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1da177e4 LT |
1 | /* |
2 | * usb-host.c: ETRAX 100LX USB Host Controller Driver (HCD) | |
3 | * | |
4 | * Copyright (c) 2002, 2003 Axis Communications AB. | |
5 | */ | |
6 | ||
1da177e4 LT |
7 | #include <linux/kernel.h> |
8 | #include <linux/delay.h> | |
9 | #include <linux/ioport.h> | |
10 | #include <linux/sched.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/errno.h> | |
13 | #include <linux/unistd.h> | |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/init.h> | |
1da177e4 LT |
16 | #include <linux/list.h> |
17 | #include <linux/spinlock.h> | |
18 | ||
19 | #include <asm/uaccess.h> | |
20 | #include <asm/io.h> | |
21 | #include <asm/irq.h> | |
22 | #include <asm/dma.h> | |
23 | #include <asm/system.h> | |
24 | #include <asm/arch/svinto.h> | |
25 | ||
26 | #include <linux/usb.h> | |
27 | /* Ugly include because we don't live with the other host drivers. */ | |
28 | #include <../drivers/usb/core/hcd.h> | |
29 | #include <../drivers/usb/core/usb.h> | |
30 | ||
31 | #include "hc_crisv10.h" | |
32 | ||
33 | #define ETRAX_USB_HC_IRQ USB_HC_IRQ_NBR | |
34 | #define ETRAX_USB_RX_IRQ USB_DMA_RX_IRQ_NBR | |
35 | #define ETRAX_USB_TX_IRQ USB_DMA_TX_IRQ_NBR | |
36 | ||
37 | static const char *usb_hcd_version = "$Revision: 1.2 $"; | |
38 | ||
39 | #undef KERN_DEBUG | |
40 | #define KERN_DEBUG "" | |
41 | ||
42 | ||
43 | #undef USB_DEBUG_RH | |
44 | #undef USB_DEBUG_EPID | |
45 | #undef USB_DEBUG_SB | |
46 | #undef USB_DEBUG_DESC | |
47 | #undef USB_DEBUG_URB | |
48 | #undef USB_DEBUG_TRACE | |
49 | #undef USB_DEBUG_BULK | |
50 | #undef USB_DEBUG_CTRL | |
51 | #undef USB_DEBUG_INTR | |
52 | #undef USB_DEBUG_ISOC | |
53 | ||
54 | #ifdef USB_DEBUG_RH | |
55 | #define dbg_rh(format, arg...) printk(KERN_DEBUG __FILE__ ": (RH) " format "\n" , ## arg) | |
56 | #else | |
57 | #define dbg_rh(format, arg...) do {} while (0) | |
58 | #endif | |
59 | ||
60 | #ifdef USB_DEBUG_EPID | |
61 | #define dbg_epid(format, arg...) printk(KERN_DEBUG __FILE__ ": (EPID) " format "\n" , ## arg) | |
62 | #else | |
63 | #define dbg_epid(format, arg...) do {} while (0) | |
64 | #endif | |
65 | ||
66 | #ifdef USB_DEBUG_SB | |
67 | #define dbg_sb(format, arg...) printk(KERN_DEBUG __FILE__ ": (SB) " format "\n" , ## arg) | |
68 | #else | |
69 | #define dbg_sb(format, arg...) do {} while (0) | |
70 | #endif | |
71 | ||
72 | #ifdef USB_DEBUG_CTRL | |
73 | #define dbg_ctrl(format, arg...) printk(KERN_DEBUG __FILE__ ": (CTRL) " format "\n" , ## arg) | |
74 | #else | |
75 | #define dbg_ctrl(format, arg...) do {} while (0) | |
76 | #endif | |
77 | ||
78 | #ifdef USB_DEBUG_BULK | |
79 | #define dbg_bulk(format, arg...) printk(KERN_DEBUG __FILE__ ": (BULK) " format "\n" , ## arg) | |
80 | #else | |
81 | #define dbg_bulk(format, arg...) do {} while (0) | |
82 | #endif | |
83 | ||
84 | #ifdef USB_DEBUG_INTR | |
85 | #define dbg_intr(format, arg...) printk(KERN_DEBUG __FILE__ ": (INTR) " format "\n" , ## arg) | |
86 | #else | |
87 | #define dbg_intr(format, arg...) do {} while (0) | |
88 | #endif | |
89 | ||
90 | #ifdef USB_DEBUG_ISOC | |
91 | #define dbg_isoc(format, arg...) printk(KERN_DEBUG __FILE__ ": (ISOC) " format "\n" , ## arg) | |
92 | #else | |
93 | #define dbg_isoc(format, arg...) do {} while (0) | |
94 | #endif | |
95 | ||
96 | #ifdef USB_DEBUG_TRACE | |
97 | #define DBFENTER (printk(": Entering: %s\n", __FUNCTION__)) | |
98 | #define DBFEXIT (printk(": Exiting: %s\n", __FUNCTION__)) | |
99 | #else | |
100 | #define DBFENTER do {} while (0) | |
101 | #define DBFEXIT do {} while (0) | |
102 | #endif | |
103 | ||
104 | #define usb_pipeslow(pipe) (((pipe) >> 26) & 1) | |
105 | ||
106 | /*------------------------------------------------------------------- | |
107 | Virtual Root Hub | |
108 | -------------------------------------------------------------------*/ | |
109 | ||
110 | static __u8 root_hub_dev_des[] = | |
111 | { | |
112 | 0x12, /* __u8 bLength; */ | |
113 | 0x01, /* __u8 bDescriptorType; Device */ | |
114 | 0x00, /* __le16 bcdUSB; v1.0 */ | |
115 | 0x01, | |
116 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
117 | 0x00, /* __u8 bDeviceSubClass; */ | |
118 | 0x00, /* __u8 bDeviceProtocol; */ | |
119 | 0x08, /* __u8 bMaxPacketSize0; 8 Bytes */ | |
120 | 0x00, /* __le16 idVendor; */ | |
121 | 0x00, | |
122 | 0x00, /* __le16 idProduct; */ | |
123 | 0x00, | |
124 | 0x00, /* __le16 bcdDevice; */ | |
125 | 0x00, | |
126 | 0x00, /* __u8 iManufacturer; */ | |
127 | 0x02, /* __u8 iProduct; */ | |
128 | 0x01, /* __u8 iSerialNumber; */ | |
129 | 0x01 /* __u8 bNumConfigurations; */ | |
130 | }; | |
131 | ||
132 | /* Configuration descriptor */ | |
133 | static __u8 root_hub_config_des[] = | |
134 | { | |
135 | 0x09, /* __u8 bLength; */ | |
136 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
137 | 0x19, /* __le16 wTotalLength; */ | |
138 | 0x00, | |
139 | 0x01, /* __u8 bNumInterfaces; */ | |
140 | 0x01, /* __u8 bConfigurationValue; */ | |
141 | 0x00, /* __u8 iConfiguration; */ | |
142 | 0x40, /* __u8 bmAttributes; Bit 7: Bus-powered */ | |
143 | 0x00, /* __u8 MaxPower; */ | |
144 | ||
145 | /* interface */ | |
146 | 0x09, /* __u8 if_bLength; */ | |
147 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
148 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
149 | 0x00, /* __u8 if_bAlternateSetting; */ | |
150 | 0x01, /* __u8 if_bNumEndpoints; */ | |
151 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
152 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
153 | 0x00, /* __u8 if_bInterfaceProtocol; */ | |
154 | 0x00, /* __u8 if_iInterface; */ | |
155 | ||
156 | /* endpoint */ | |
157 | 0x07, /* __u8 ep_bLength; */ | |
158 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
159 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
160 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ | |
161 | 0x08, /* __le16 ep_wMaxPacketSize; 8 Bytes */ | |
162 | 0x00, | |
163 | 0xff /* __u8 ep_bInterval; 255 ms */ | |
164 | }; | |
165 | ||
166 | static __u8 root_hub_hub_des[] = | |
167 | { | |
168 | 0x09, /* __u8 bLength; */ | |
169 | 0x29, /* __u8 bDescriptorType; Hub-descriptor */ | |
170 | 0x02, /* __u8 bNbrPorts; */ | |
171 | 0x00, /* __u16 wHubCharacteristics; */ | |
172 | 0x00, | |
173 | 0x01, /* __u8 bPwrOn2pwrGood; 2ms */ | |
174 | 0x00, /* __u8 bHubContrCurrent; 0 mA */ | |
175 | 0x00, /* __u8 DeviceRemovable; *** 7 Ports max *** */ | |
176 | 0xff /* __u8 PortPwrCtrlMask; *** 7 ports max *** */ | |
177 | }; | |
178 | ||
8d06afab IM |
179 | static DEFINE_TIMER(bulk_start_timer, NULL, 0, 0); |
180 | static DEFINE_TIMER(bulk_eot_timer, NULL, 0, 0); | |
1da177e4 LT |
181 | |
182 | /* We want the start timer to expire before the eot timer, because the former might start | |
183 | traffic, thus making it unnecessary for the latter to time out. */ | |
184 | #define BULK_START_TIMER_INTERVAL (HZ/10) /* 100 ms */ | |
185 | #define BULK_EOT_TIMER_INTERVAL (HZ/10+2) /* 120 ms */ | |
186 | ||
187 | #define OK(x) len = (x); dbg_rh("OK(%d): line: %d", x, __LINE__); break | |
188 | #define CHECK_ALIGN(x) if (((__u32)(x)) & 0x00000003) \ | |
189 | {panic("Alignment check (DWORD) failed at %s:%s:%d\n", __FILE__, __FUNCTION__, __LINE__);} | |
190 | ||
e94b1766 | 191 | #define SLAB_FLAG (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL) |
1da177e4 LT |
192 | #define KMALLOC_FLAG (in_interrupt() ? GFP_ATOMIC : GFP_KERNEL) |
193 | ||
194 | /* Most helpful debugging aid */ | |
195 | #define assert(expr) ((void) ((expr) ? 0 : (err("assert failed at line %d",__LINE__)))) | |
196 | ||
197 | /* Alternative assert define which stops after a failed assert. */ | |
198 | /* | |
199 | #define assert(expr) \ | |
200 | { \ | |
201 | if (!(expr)) { \ | |
202 | err("assert failed at line %d",__LINE__); \ | |
203 | while (1); \ | |
204 | } \ | |
205 | } | |
206 | */ | |
207 | ||
208 | ||
209 | /* FIXME: Should RX_BUF_SIZE be a config option, or maybe we should adjust it dynamically? | |
210 | To adjust it dynamically we would have to get an interrupt when we reach the end | |
211 | of the rx descriptor list, or when we get close to the end, and then allocate more | |
212 | descriptors. */ | |
213 | ||
214 | #define NBR_OF_RX_DESC 512 | |
215 | #define RX_DESC_BUF_SIZE 1024 | |
216 | #define RX_BUF_SIZE (NBR_OF_RX_DESC * RX_DESC_BUF_SIZE) | |
217 | ||
218 | /* The number of epids is, among other things, used for pre-allocating | |
219 | ctrl, bulk and isoc EP descriptors (one for each epid). | |
220 | Assumed to be > 1 when initiating the DMA lists. */ | |
221 | #define NBR_OF_EPIDS 32 | |
222 | ||
223 | /* Support interrupt traffic intervals up to 128 ms. */ | |
224 | #define MAX_INTR_INTERVAL 128 | |
225 | ||
226 | /* If periodic traffic (intr or isoc) is to be used, then one entry in the EP table | |
227 | must be "invalid". By this we mean that we shouldn't care about epid attentions | |
228 | for this epid, or at least handle them differently from epid attentions for "valid" | |
229 | epids. This define determines which one to use (don't change it). */ | |
230 | #define INVALID_EPID 31 | |
231 | /* A special epid for the bulk dummys. */ | |
232 | #define DUMMY_EPID 30 | |
233 | ||
234 | /* This is just a software cache for the valid entries in R_USB_EPT_DATA. */ | |
235 | static __u32 epid_usage_bitmask; | |
236 | ||
237 | /* A bitfield to keep information on in/out traffic is needed to uniquely identify | |
238 | an endpoint on a device, since the most significant bit which indicates traffic | |
239 | direction is lacking in the ep_id field (ETRAX epids can handle both in and | |
240 | out traffic on endpoints that are otherwise identical). The USB framework, however, | |
241 | relies on them to be handled separately. For example, bulk IN and OUT urbs cannot | |
242 | be queued in the same list, since they would block each other. */ | |
243 | static __u32 epid_out_traffic; | |
244 | ||
245 | /* DMA IN cache bug. Align the DMA IN buffers to 32 bytes, i.e. a cache line. | |
246 | Since RX_DESC_BUF_SIZE is 1024 is a multiple of 32, all rx buffers will be cache aligned. */ | |
247 | static volatile unsigned char RxBuf[RX_BUF_SIZE] __attribute__ ((aligned (32))); | |
248 | static volatile USB_IN_Desc_t RxDescList[NBR_OF_RX_DESC] __attribute__ ((aligned (4))); | |
249 | ||
250 | /* Pointers into RxDescList. */ | |
251 | static volatile USB_IN_Desc_t *myNextRxDesc; | |
252 | static volatile USB_IN_Desc_t *myLastRxDesc; | |
253 | static volatile USB_IN_Desc_t *myPrevRxDesc; | |
254 | ||
255 | /* EP descriptors must be 32-bit aligned. */ | |
256 | static volatile USB_EP_Desc_t TxCtrlEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4))); | |
257 | static volatile USB_EP_Desc_t TxBulkEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4))); | |
258 | /* After each enabled bulk EP (IN or OUT) we put two disabled EP descriptors with the eol flag set, | |
259 | causing the DMA to stop the DMA channel. The first of these two has the intr flag set, which | |
260 | gives us a dma8_sub0_descr interrupt. When we receive this, we advance the DMA one step in the | |
261 | EP list and then restart the bulk channel, thus forcing a switch between bulk EP descriptors | |
262 | in each frame. */ | |
263 | static volatile USB_EP_Desc_t TxBulkDummyEPList[NBR_OF_EPIDS][2] __attribute__ ((aligned (4))); | |
264 | ||
265 | static volatile USB_EP_Desc_t TxIsocEPList[NBR_OF_EPIDS] __attribute__ ((aligned (4))); | |
266 | static volatile USB_SB_Desc_t TxIsocSB_zout __attribute__ ((aligned (4))); | |
267 | ||
268 | static volatile USB_EP_Desc_t TxIntrEPList[MAX_INTR_INTERVAL] __attribute__ ((aligned (4))); | |
269 | static volatile USB_SB_Desc_t TxIntrSB_zout __attribute__ ((aligned (4))); | |
270 | ||
271 | /* A zout transfer makes a memory access at the address of its buf pointer, which means that setting | |
272 | this buf pointer to 0 will cause an access to the flash. In addition to this, setting sw_len to 0 | |
273 | results in a 16/32 bytes (depending on DMA burst size) transfer. Instead, we set it to 1, and point | |
274 | it to this buffer. */ | |
275 | static int zout_buffer[4] __attribute__ ((aligned (4))); | |
276 | ||
277 | /* Cache for allocating new EP and SB descriptors. */ | |
278 | static kmem_cache_t *usb_desc_cache; | |
279 | ||
280 | /* Cache for the registers allocated in the top half. */ | |
281 | static kmem_cache_t *top_half_reg_cache; | |
282 | ||
283 | /* Cache for the data allocated in the isoc descr top half. */ | |
284 | static kmem_cache_t *isoc_compl_cache; | |
285 | ||
286 | static struct usb_bus *etrax_usb_bus; | |
287 | ||
288 | /* This is a circular (double-linked) list of the active urbs for each epid. | |
289 | The head is never removed, and new urbs are linked onto the list as | |
290 | urb_entry_t elements. Don't reference urb_list directly; use the wrapper | |
291 | functions instead. Note that working with these lists might require spinlock | |
292 | protection. */ | |
293 | static struct list_head urb_list[NBR_OF_EPIDS]; | |
294 | ||
295 | /* Read about the need and usage of this lock in submit_ctrl_urb. */ | |
296 | static spinlock_t urb_list_lock; | |
297 | ||
298 | /* Used when unlinking asynchronously. */ | |
299 | static struct list_head urb_unlink_list; | |
300 | ||
301 | /* for returning string descriptors in UTF-16LE */ | |
302 | static int ascii2utf (char *ascii, __u8 *utf, int utfmax) | |
303 | { | |
304 | int retval; | |
305 | ||
306 | for (retval = 0; *ascii && utfmax > 1; utfmax -= 2, retval += 2) { | |
307 | *utf++ = *ascii++ & 0x7f; | |
308 | *utf++ = 0; | |
309 | } | |
310 | return retval; | |
311 | } | |
312 | ||
313 | static int usb_root_hub_string (int id, int serial, char *type, __u8 *data, int len) | |
314 | { | |
315 | char buf [30]; | |
316 | ||
317 | // assert (len > (2 * (sizeof (buf) + 1))); | |
318 | // assert (strlen (type) <= 8); | |
319 | ||
320 | // language ids | |
321 | if (id == 0) { | |
322 | *data++ = 4; *data++ = 3; /* 4 bytes data */ | |
323 | *data++ = 0; *data++ = 0; /* some language id */ | |
324 | return 4; | |
325 | ||
326 | // serial number | |
327 | } else if (id == 1) { | |
328 | sprintf (buf, "%x", serial); | |
329 | ||
330 | // product description | |
331 | } else if (id == 2) { | |
332 | sprintf (buf, "USB %s Root Hub", type); | |
333 | ||
334 | // id 3 == vendor description | |
335 | ||
336 | // unsupported IDs --> "stall" | |
337 | } else | |
338 | return 0; | |
339 | ||
340 | data [0] = 2 + ascii2utf (buf, data + 2, len - 2); | |
341 | data [1] = 3; | |
342 | return data [0]; | |
343 | } | |
344 | ||
345 | /* Wrappers around the list functions (include/linux/list.h). */ | |
346 | ||
347 | static inline int urb_list_empty(int epid) | |
348 | { | |
349 | return list_empty(&urb_list[epid]); | |
350 | } | |
351 | ||
352 | /* Returns first urb for this epid, or NULL if list is empty. */ | |
353 | static inline struct urb *urb_list_first(int epid) | |
354 | { | |
355 | struct urb *first_urb = 0; | |
356 | ||
357 | if (!urb_list_empty(epid)) { | |
358 | /* Get the first urb (i.e. head->next). */ | |
359 | urb_entry_t *urb_entry = list_entry((&urb_list[epid])->next, urb_entry_t, list); | |
360 | first_urb = urb_entry->urb; | |
361 | } | |
362 | return first_urb; | |
363 | } | |
364 | ||
365 | /* Adds an urb_entry last in the list for this epid. */ | |
366 | static inline void urb_list_add(struct urb *urb, int epid) | |
367 | { | |
368 | urb_entry_t *urb_entry = (urb_entry_t *)kmalloc(sizeof(urb_entry_t), KMALLOC_FLAG); | |
369 | assert(urb_entry); | |
370 | ||
371 | urb_entry->urb = urb; | |
372 | list_add_tail(&urb_entry->list, &urb_list[epid]); | |
373 | } | |
374 | ||
375 | /* Search through the list for an element that contains this urb. (The list | |
376 | is expected to be short and the one we are about to delete will often be | |
377 | the first in the list.) */ | |
378 | static inline urb_entry_t *__urb_list_entry(struct urb *urb, int epid) | |
379 | { | |
380 | struct list_head *entry; | |
381 | struct list_head *tmp; | |
382 | urb_entry_t *urb_entry; | |
383 | ||
384 | list_for_each_safe(entry, tmp, &urb_list[epid]) { | |
385 | urb_entry = list_entry(entry, urb_entry_t, list); | |
386 | assert(urb_entry); | |
387 | assert(urb_entry->urb); | |
388 | ||
389 | if (urb_entry->urb == urb) { | |
390 | return urb_entry; | |
391 | } | |
392 | } | |
393 | return 0; | |
394 | } | |
395 | ||
396 | /* Delete an urb from the list. */ | |
397 | static inline void urb_list_del(struct urb *urb, int epid) | |
398 | { | |
399 | urb_entry_t *urb_entry = __urb_list_entry(urb, epid); | |
400 | assert(urb_entry); | |
401 | ||
402 | /* Delete entry and free. */ | |
403 | list_del(&urb_entry->list); | |
404 | kfree(urb_entry); | |
405 | } | |
406 | ||
407 | /* Move an urb to the end of the list. */ | |
408 | static inline void urb_list_move_last(struct urb *urb, int epid) | |
409 | { | |
410 | urb_entry_t *urb_entry = __urb_list_entry(urb, epid); | |
411 | assert(urb_entry); | |
412 | ||
179e0917 | 413 | list_move_tail(&urb_entry->list, &urb_list[epid]); |
1da177e4 LT |
414 | } |
415 | ||
416 | /* Get the next urb in the list. */ | |
417 | static inline struct urb *urb_list_next(struct urb *urb, int epid) | |
418 | { | |
419 | urb_entry_t *urb_entry = __urb_list_entry(urb, epid); | |
420 | ||
421 | assert(urb_entry); | |
422 | ||
423 | if (urb_entry->list.next != &urb_list[epid]) { | |
424 | struct list_head *elem = urb_entry->list.next; | |
425 | urb_entry = list_entry(elem, urb_entry_t, list); | |
426 | return urb_entry->urb; | |
427 | } else { | |
428 | return NULL; | |
429 | } | |
430 | } | |
431 | ||
432 | ||
433 | ||
434 | /* For debug purposes only. */ | |
435 | static inline void urb_list_dump(int epid) | |
436 | { | |
437 | struct list_head *entry; | |
438 | struct list_head *tmp; | |
439 | urb_entry_t *urb_entry; | |
440 | int i = 0; | |
441 | ||
442 | info("Dumping urb list for epid %d", epid); | |
443 | ||
444 | list_for_each_safe(entry, tmp, &urb_list[epid]) { | |
445 | urb_entry = list_entry(entry, urb_entry_t, list); | |
446 | info(" entry %d, urb = 0x%lx", i, (unsigned long)urb_entry->urb); | |
447 | } | |
448 | } | |
449 | ||
450 | static void init_rx_buffers(void); | |
451 | static int etrax_rh_unlink_urb(struct urb *urb); | |
452 | static void etrax_rh_send_irq(struct urb *urb); | |
453 | static void etrax_rh_init_int_timer(struct urb *urb); | |
454 | static void etrax_rh_int_timer_do(unsigned long ptr); | |
455 | ||
456 | static int etrax_usb_setup_epid(struct urb *urb); | |
457 | static int etrax_usb_lookup_epid(struct urb *urb); | |
458 | static int etrax_usb_allocate_epid(void); | |
459 | static void etrax_usb_free_epid(int epid); | |
460 | ||
461 | static int etrax_remove_from_sb_list(struct urb *urb); | |
462 | ||
5db539e4 OK |
463 | static void* etrax_usb_buffer_alloc(struct usb_bus* bus, size_t size, |
464 | unsigned mem_flags, dma_addr_t *dma); | |
1da177e4 LT |
465 | static void etrax_usb_buffer_free(struct usb_bus *bus, size_t size, void *addr, dma_addr_t dma); |
466 | ||
467 | static void etrax_usb_add_to_bulk_sb_list(struct urb *urb, int epid); | |
468 | static void etrax_usb_add_to_ctrl_sb_list(struct urb *urb, int epid); | |
469 | static void etrax_usb_add_to_intr_sb_list(struct urb *urb, int epid); | |
470 | static void etrax_usb_add_to_isoc_sb_list(struct urb *urb, int epid); | |
471 | ||
472 | static int etrax_usb_submit_bulk_urb(struct urb *urb); | |
473 | static int etrax_usb_submit_ctrl_urb(struct urb *urb); | |
474 | static int etrax_usb_submit_intr_urb(struct urb *urb); | |
475 | static int etrax_usb_submit_isoc_urb(struct urb *urb); | |
476 | ||
5db539e4 | 477 | static int etrax_usb_submit_urb(struct urb *urb, unsigned mem_flags); |
1da177e4 LT |
478 | static int etrax_usb_unlink_urb(struct urb *urb, int status); |
479 | static int etrax_usb_get_frame_number(struct usb_device *usb_dev); | |
480 | ||
7d12e780 DH |
481 | static irqreturn_t etrax_usb_tx_interrupt(int irq, void *vhc); |
482 | static irqreturn_t etrax_usb_rx_interrupt(int irq, void *vhc); | |
483 | static irqreturn_t etrax_usb_hc_interrupt_top_half(int irq, void *vhc); | |
1da177e4 LT |
484 | static void etrax_usb_hc_interrupt_bottom_half(void *data); |
485 | ||
486 | static void etrax_usb_isoc_descr_interrupt_bottom_half(void *data); | |
487 | ||
488 | ||
489 | /* The following is a list of interrupt handlers for the host controller interrupts we use. | |
490 | They are called from etrax_usb_hc_interrupt_bottom_half. */ | |
491 | static void etrax_usb_hc_isoc_eof_interrupt(void); | |
492 | static void etrax_usb_hc_bulk_eot_interrupt(int timer_induced); | |
493 | static void etrax_usb_hc_epid_attn_interrupt(usb_interrupt_registers_t *reg); | |
494 | static void etrax_usb_hc_port_status_interrupt(usb_interrupt_registers_t *reg); | |
495 | static void etrax_usb_hc_ctl_status_interrupt(usb_interrupt_registers_t *reg); | |
496 | ||
497 | static int etrax_rh_submit_urb (struct urb *urb); | |
498 | ||
499 | /* Forward declaration needed because they are used in the rx interrupt routine. */ | |
500 | static void etrax_usb_complete_urb(struct urb *urb, int status); | |
501 | static void etrax_usb_complete_bulk_urb(struct urb *urb, int status); | |
502 | static void etrax_usb_complete_ctrl_urb(struct urb *urb, int status); | |
503 | static void etrax_usb_complete_intr_urb(struct urb *urb, int status); | |
504 | static void etrax_usb_complete_isoc_urb(struct urb *urb, int status); | |
505 | ||
506 | static int etrax_usb_hc_init(void); | |
507 | static void etrax_usb_hc_cleanup(void); | |
508 | ||
509 | static struct usb_operations etrax_usb_device_operations = | |
510 | { | |
511 | .get_frame_number = etrax_usb_get_frame_number, | |
512 | .submit_urb = etrax_usb_submit_urb, | |
513 | .unlink_urb = etrax_usb_unlink_urb, | |
514 | .buffer_alloc = etrax_usb_buffer_alloc, | |
515 | .buffer_free = etrax_usb_buffer_free | |
516 | }; | |
517 | ||
518 | /* Note that these functions are always available in their "__" variants, for use in | |
519 | error situations. The "__" missing variants are controlled by the USB_DEBUG_DESC/ | |
520 | USB_DEBUG_URB macros. */ | |
521 | static void __dump_urb(struct urb* purb) | |
522 | { | |
523 | printk("\nurb :0x%08lx\n", (unsigned long)purb); | |
524 | printk("dev :0x%08lx\n", (unsigned long)purb->dev); | |
525 | printk("pipe :0x%08x\n", purb->pipe); | |
526 | printk("status :%d\n", purb->status); | |
527 | printk("transfer_flags :0x%08x\n", purb->transfer_flags); | |
528 | printk("transfer_buffer :0x%08lx\n", (unsigned long)purb->transfer_buffer); | |
529 | printk("transfer_buffer_length:%d\n", purb->transfer_buffer_length); | |
530 | printk("actual_length :%d\n", purb->actual_length); | |
531 | printk("setup_packet :0x%08lx\n", (unsigned long)purb->setup_packet); | |
532 | printk("start_frame :%d\n", purb->start_frame); | |
533 | printk("number_of_packets :%d\n", purb->number_of_packets); | |
534 | printk("interval :%d\n", purb->interval); | |
535 | printk("error_count :%d\n", purb->error_count); | |
536 | printk("context :0x%08lx\n", (unsigned long)purb->context); | |
537 | printk("complete :0x%08lx\n\n", (unsigned long)purb->complete); | |
538 | } | |
539 | ||
540 | static void __dump_in_desc(volatile USB_IN_Desc_t *in) | |
541 | { | |
542 | printk("\nUSB_IN_Desc at 0x%08lx\n", (unsigned long)in); | |
543 | printk(" sw_len : 0x%04x (%d)\n", in->sw_len, in->sw_len); | |
544 | printk(" command : 0x%04x\n", in->command); | |
545 | printk(" next : 0x%08lx\n", in->next); | |
546 | printk(" buf : 0x%08lx\n", in->buf); | |
547 | printk(" hw_len : 0x%04x (%d)\n", in->hw_len, in->hw_len); | |
548 | printk(" status : 0x%04x\n\n", in->status); | |
549 | } | |
550 | ||
551 | static void __dump_sb_desc(volatile USB_SB_Desc_t *sb) | |
552 | { | |
553 | char tt = (sb->command & 0x30) >> 4; | |
554 | char *tt_string; | |
555 | ||
556 | switch (tt) { | |
557 | case 0: | |
558 | tt_string = "zout"; | |
559 | break; | |
560 | case 1: | |
561 | tt_string = "in"; | |
562 | break; | |
563 | case 2: | |
564 | tt_string = "out"; | |
565 | break; | |
566 | case 3: | |
567 | tt_string = "setup"; | |
568 | break; | |
569 | default: | |
570 | tt_string = "unknown (weird)"; | |
571 | } | |
572 | ||
573 | printk("\n USB_SB_Desc at 0x%08lx\n", (unsigned long)sb); | |
574 | printk(" command : 0x%04x\n", sb->command); | |
575 | printk(" rem : %d\n", (sb->command & 0x3f00) >> 8); | |
576 | printk(" full : %d\n", (sb->command & 0x40) >> 6); | |
577 | printk(" tt : %d (%s)\n", tt, tt_string); | |
578 | printk(" intr : %d\n", (sb->command & 0x8) >> 3); | |
579 | printk(" eot : %d\n", (sb->command & 0x2) >> 1); | |
580 | printk(" eol : %d\n", sb->command & 0x1); | |
581 | printk(" sw_len : 0x%04x (%d)\n", sb->sw_len, sb->sw_len); | |
582 | printk(" next : 0x%08lx\n", sb->next); | |
583 | printk(" buf : 0x%08lx\n\n", sb->buf); | |
584 | } | |
585 | ||
586 | ||
587 | static void __dump_ep_desc(volatile USB_EP_Desc_t *ep) | |
588 | { | |
589 | printk("\nUSB_EP_Desc at 0x%08lx\n", (unsigned long)ep); | |
590 | printk(" command : 0x%04x\n", ep->command); | |
591 | printk(" ep_id : %d\n", (ep->command & 0x1f00) >> 8); | |
592 | printk(" enable : %d\n", (ep->command & 0x10) >> 4); | |
593 | printk(" intr : %d\n", (ep->command & 0x8) >> 3); | |
594 | printk(" eof : %d\n", (ep->command & 0x2) >> 1); | |
595 | printk(" eol : %d\n", ep->command & 0x1); | |
596 | printk(" hw_len : 0x%04x (%d)\n", ep->hw_len, ep->hw_len); | |
597 | printk(" next : 0x%08lx\n", ep->next); | |
598 | printk(" sub : 0x%08lx\n\n", ep->sub); | |
599 | } | |
600 | ||
601 | static inline void __dump_ep_list(int pipe_type) | |
602 | { | |
603 | volatile USB_EP_Desc_t *ep; | |
604 | volatile USB_EP_Desc_t *first_ep; | |
605 | volatile USB_SB_Desc_t *sb; | |
606 | ||
607 | switch (pipe_type) | |
608 | { | |
609 | case PIPE_BULK: | |
610 | first_ep = &TxBulkEPList[0]; | |
611 | break; | |
612 | case PIPE_CONTROL: | |
613 | first_ep = &TxCtrlEPList[0]; | |
614 | break; | |
615 | case PIPE_INTERRUPT: | |
616 | first_ep = &TxIntrEPList[0]; | |
617 | break; | |
618 | case PIPE_ISOCHRONOUS: | |
619 | first_ep = &TxIsocEPList[0]; | |
620 | break; | |
621 | default: | |
622 | warn("Cannot dump unknown traffic type"); | |
623 | return; | |
624 | } | |
625 | ep = first_ep; | |
626 | ||
627 | printk("\n\nDumping EP list...\n\n"); | |
628 | ||
629 | do { | |
630 | __dump_ep_desc(ep); | |
631 | /* Cannot phys_to_virt on 0 as it turns into 80000000, which is != 0. */ | |
632 | sb = ep->sub ? phys_to_virt(ep->sub) : 0; | |
633 | while (sb) { | |
634 | __dump_sb_desc(sb); | |
635 | sb = sb->next ? phys_to_virt(sb->next) : 0; | |
636 | } | |
637 | ep = (volatile USB_EP_Desc_t *)(phys_to_virt(ep->next)); | |
638 | ||
639 | } while (ep != first_ep); | |
640 | } | |
641 | ||
642 | static inline void __dump_ept_data(int epid) | |
643 | { | |
644 | unsigned long flags; | |
645 | __u32 r_usb_ept_data; | |
646 | ||
647 | if (epid < 0 || epid > 31) { | |
648 | printk("Cannot dump ept data for invalid epid %d\n", epid); | |
649 | return; | |
650 | } | |
651 | ||
652 | save_flags(flags); | |
653 | cli(); | |
654 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
655 | nop(); | |
656 | r_usb_ept_data = *R_USB_EPT_DATA; | |
657 | restore_flags(flags); | |
658 | ||
659 | printk("\nR_USB_EPT_DATA = 0x%x for epid %d :\n", r_usb_ept_data, epid); | |
660 | if (r_usb_ept_data == 0) { | |
661 | /* No need for more detailed printing. */ | |
662 | return; | |
663 | } | |
664 | printk(" valid : %d\n", (r_usb_ept_data & 0x80000000) >> 31); | |
665 | printk(" hold : %d\n", (r_usb_ept_data & 0x40000000) >> 30); | |
666 | printk(" error_count_in : %d\n", (r_usb_ept_data & 0x30000000) >> 28); | |
667 | printk(" t_in : %d\n", (r_usb_ept_data & 0x08000000) >> 27); | |
668 | printk(" low_speed : %d\n", (r_usb_ept_data & 0x04000000) >> 26); | |
669 | printk(" port : %d\n", (r_usb_ept_data & 0x03000000) >> 24); | |
670 | printk(" error_code : %d\n", (r_usb_ept_data & 0x00c00000) >> 22); | |
671 | printk(" t_out : %d\n", (r_usb_ept_data & 0x00200000) >> 21); | |
672 | printk(" error_count_out : %d\n", (r_usb_ept_data & 0x00180000) >> 19); | |
673 | printk(" max_len : %d\n", (r_usb_ept_data & 0x0003f800) >> 11); | |
674 | printk(" ep : %d\n", (r_usb_ept_data & 0x00000780) >> 7); | |
675 | printk(" dev : %d\n", (r_usb_ept_data & 0x0000003f)); | |
676 | } | |
677 | ||
678 | static inline void __dump_ept_data_list(void) | |
679 | { | |
680 | int i; | |
681 | ||
682 | printk("Dumping the whole R_USB_EPT_DATA list\n"); | |
683 | ||
684 | for (i = 0; i < 32; i++) { | |
685 | __dump_ept_data(i); | |
686 | } | |
687 | } | |
688 | #ifdef USB_DEBUG_DESC | |
689 | #define dump_in_desc(...) __dump_in_desc(...) | |
690 | #define dump_sb_desc(...) __dump_sb_desc(...) | |
691 | #define dump_ep_desc(...) __dump_ep_desc(...) | |
692 | #else | |
693 | #define dump_in_desc(...) do {} while (0) | |
694 | #define dump_sb_desc(...) do {} while (0) | |
695 | #define dump_ep_desc(...) do {} while (0) | |
696 | #endif | |
697 | ||
698 | #ifdef USB_DEBUG_URB | |
699 | #define dump_urb(x) __dump_urb(x) | |
700 | #else | |
701 | #define dump_urb(x) do {} while (0) | |
702 | #endif | |
703 | ||
704 | static void init_rx_buffers(void) | |
705 | { | |
706 | int i; | |
707 | ||
708 | DBFENTER; | |
709 | ||
710 | for (i = 0; i < (NBR_OF_RX_DESC - 1); i++) { | |
711 | RxDescList[i].sw_len = RX_DESC_BUF_SIZE; | |
712 | RxDescList[i].command = 0; | |
713 | RxDescList[i].next = virt_to_phys(&RxDescList[i + 1]); | |
714 | RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE)); | |
715 | RxDescList[i].hw_len = 0; | |
716 | RxDescList[i].status = 0; | |
717 | ||
718 | /* DMA IN cache bug. (struct etrax_dma_descr has the same layout as USB_IN_Desc | |
719 | for the relevant fields.) */ | |
720 | prepare_rx_descriptor((struct etrax_dma_descr*)&RxDescList[i]); | |
721 | ||
722 | } | |
723 | ||
724 | RxDescList[i].sw_len = RX_DESC_BUF_SIZE; | |
725 | RxDescList[i].command = IO_STATE(USB_IN_command, eol, yes); | |
726 | RxDescList[i].next = virt_to_phys(&RxDescList[0]); | |
727 | RxDescList[i].buf = virt_to_phys(RxBuf + (i * RX_DESC_BUF_SIZE)); | |
728 | RxDescList[i].hw_len = 0; | |
729 | RxDescList[i].status = 0; | |
730 | ||
731 | myNextRxDesc = &RxDescList[0]; | |
732 | myLastRxDesc = &RxDescList[NBR_OF_RX_DESC - 1]; | |
733 | myPrevRxDesc = &RxDescList[NBR_OF_RX_DESC - 1]; | |
734 | ||
735 | *R_DMA_CH9_FIRST = virt_to_phys(myNextRxDesc); | |
736 | *R_DMA_CH9_CMD = IO_STATE(R_DMA_CH9_CMD, cmd, start); | |
737 | ||
738 | DBFEXIT; | |
739 | } | |
740 | ||
741 | static void init_tx_bulk_ep(void) | |
742 | { | |
743 | int i; | |
744 | ||
745 | DBFENTER; | |
746 | ||
747 | for (i = 0; i < (NBR_OF_EPIDS - 1); i++) { | |
748 | CHECK_ALIGN(&TxBulkEPList[i]); | |
749 | TxBulkEPList[i].hw_len = 0; | |
750 | TxBulkEPList[i].command = IO_FIELD(USB_EP_command, epid, i); | |
751 | TxBulkEPList[i].sub = 0; | |
752 | TxBulkEPList[i].next = virt_to_phys(&TxBulkEPList[i + 1]); | |
753 | ||
754 | /* Initiate two EPs, disabled and with the eol flag set. No need for any | |
755 | preserved epid. */ | |
756 | ||
757 | /* The first one has the intr flag set so we get an interrupt when the DMA | |
758 | channel is about to become disabled. */ | |
759 | CHECK_ALIGN(&TxBulkDummyEPList[i][0]); | |
760 | TxBulkDummyEPList[i][0].hw_len = 0; | |
761 | TxBulkDummyEPList[i][0].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) | | |
762 | IO_STATE(USB_EP_command, eol, yes) | | |
763 | IO_STATE(USB_EP_command, intr, yes)); | |
764 | TxBulkDummyEPList[i][0].sub = 0; | |
765 | TxBulkDummyEPList[i][0].next = virt_to_phys(&TxBulkDummyEPList[i][1]); | |
766 | ||
767 | /* The second one. */ | |
768 | CHECK_ALIGN(&TxBulkDummyEPList[i][1]); | |
769 | TxBulkDummyEPList[i][1].hw_len = 0; | |
770 | TxBulkDummyEPList[i][1].command = (IO_FIELD(USB_EP_command, epid, DUMMY_EPID) | | |
771 | IO_STATE(USB_EP_command, eol, yes)); | |
772 | TxBulkDummyEPList[i][1].sub = 0; | |
773 | /* The last dummy's next pointer is the same as the current EP's next pointer. */ | |
774 | TxBulkDummyEPList[i][1].next = virt_to_phys(&TxBulkEPList[i + 1]); | |
775 | } | |
776 | ||
777 | /* Configure the last one. */ | |
778 | CHECK_ALIGN(&TxBulkEPList[i]); | |
779 | TxBulkEPList[i].hw_len = 0; | |
780 | TxBulkEPList[i].command = (IO_STATE(USB_EP_command, eol, yes) | | |
781 | IO_FIELD(USB_EP_command, epid, i)); | |
782 | TxBulkEPList[i].sub = 0; | |
783 | TxBulkEPList[i].next = virt_to_phys(&TxBulkEPList[0]); | |
784 | ||
785 | /* No need configuring dummy EPs for the last one as it will never be used for | |
786 | bulk traffic (i == INVALD_EPID at this point). */ | |
787 | ||
788 | /* Set up to start on the last EP so we will enable it when inserting traffic | |
789 | for the first time (imitating the situation where the DMA has stopped | |
790 | because there was no more traffic). */ | |
791 | *R_DMA_CH8_SUB0_EP = virt_to_phys(&TxBulkEPList[i]); | |
792 | /* No point in starting the bulk channel yet. | |
793 | *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); */ | |
794 | DBFEXIT; | |
795 | } | |
796 | ||
797 | static void init_tx_ctrl_ep(void) | |
798 | { | |
799 | int i; | |
800 | ||
801 | DBFENTER; | |
802 | ||
803 | for (i = 0; i < (NBR_OF_EPIDS - 1); i++) { | |
804 | CHECK_ALIGN(&TxCtrlEPList[i]); | |
805 | TxCtrlEPList[i].hw_len = 0; | |
806 | TxCtrlEPList[i].command = IO_FIELD(USB_EP_command, epid, i); | |
807 | TxCtrlEPList[i].sub = 0; | |
808 | TxCtrlEPList[i].next = virt_to_phys(&TxCtrlEPList[i + 1]); | |
809 | } | |
810 | ||
811 | CHECK_ALIGN(&TxCtrlEPList[i]); | |
812 | TxCtrlEPList[i].hw_len = 0; | |
813 | TxCtrlEPList[i].command = (IO_STATE(USB_EP_command, eol, yes) | | |
814 | IO_FIELD(USB_EP_command, epid, i)); | |
815 | ||
816 | TxCtrlEPList[i].sub = 0; | |
817 | TxCtrlEPList[i].next = virt_to_phys(&TxCtrlEPList[0]); | |
818 | ||
819 | *R_DMA_CH8_SUB1_EP = virt_to_phys(&TxCtrlEPList[0]); | |
820 | *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start); | |
821 | ||
822 | DBFEXIT; | |
823 | } | |
824 | ||
825 | ||
826 | static void init_tx_intr_ep(void) | |
827 | { | |
828 | int i; | |
829 | ||
830 | DBFENTER; | |
831 | ||
832 | /* Read comment at zout_buffer declaration for an explanation to this. */ | |
833 | TxIntrSB_zout.sw_len = 1; | |
834 | TxIntrSB_zout.next = 0; | |
835 | TxIntrSB_zout.buf = virt_to_phys(&zout_buffer[0]); | |
836 | TxIntrSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) | | |
837 | IO_STATE(USB_SB_command, tt, zout) | | |
838 | IO_STATE(USB_SB_command, full, yes) | | |
839 | IO_STATE(USB_SB_command, eot, yes) | | |
840 | IO_STATE(USB_SB_command, eol, yes)); | |
841 | ||
842 | for (i = 0; i < (MAX_INTR_INTERVAL - 1); i++) { | |
843 | CHECK_ALIGN(&TxIntrEPList[i]); | |
844 | TxIntrEPList[i].hw_len = 0; | |
845 | TxIntrEPList[i].command = | |
846 | (IO_STATE(USB_EP_command, eof, yes) | | |
847 | IO_STATE(USB_EP_command, enable, yes) | | |
848 | IO_FIELD(USB_EP_command, epid, INVALID_EPID)); | |
849 | TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout); | |
850 | TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[i + 1]); | |
851 | } | |
852 | ||
853 | CHECK_ALIGN(&TxIntrEPList[i]); | |
854 | TxIntrEPList[i].hw_len = 0; | |
855 | TxIntrEPList[i].command = | |
856 | (IO_STATE(USB_EP_command, eof, yes) | | |
857 | IO_STATE(USB_EP_command, eol, yes) | | |
858 | IO_STATE(USB_EP_command, enable, yes) | | |
859 | IO_FIELD(USB_EP_command, epid, INVALID_EPID)); | |
860 | TxIntrEPList[i].sub = virt_to_phys(&TxIntrSB_zout); | |
861 | TxIntrEPList[i].next = virt_to_phys(&TxIntrEPList[0]); | |
862 | ||
863 | *R_DMA_CH8_SUB2_EP = virt_to_phys(&TxIntrEPList[0]); | |
864 | *R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start); | |
865 | DBFEXIT; | |
866 | } | |
867 | ||
868 | static void init_tx_isoc_ep(void) | |
869 | { | |
870 | int i; | |
871 | ||
872 | DBFENTER; | |
873 | ||
874 | /* Read comment at zout_buffer declaration for an explanation to this. */ | |
875 | TxIsocSB_zout.sw_len = 1; | |
876 | TxIsocSB_zout.next = 0; | |
877 | TxIsocSB_zout.buf = virt_to_phys(&zout_buffer[0]); | |
878 | TxIsocSB_zout.command = (IO_FIELD(USB_SB_command, rem, 0) | | |
879 | IO_STATE(USB_SB_command, tt, zout) | | |
880 | IO_STATE(USB_SB_command, full, yes) | | |
881 | IO_STATE(USB_SB_command, eot, yes) | | |
882 | IO_STATE(USB_SB_command, eol, yes)); | |
883 | ||
884 | /* The last isochronous EP descriptor is a dummy. */ | |
885 | ||
886 | for (i = 0; i < (NBR_OF_EPIDS - 1); i++) { | |
887 | CHECK_ALIGN(&TxIsocEPList[i]); | |
888 | TxIsocEPList[i].hw_len = 0; | |
889 | TxIsocEPList[i].command = IO_FIELD(USB_EP_command, epid, i); | |
890 | TxIsocEPList[i].sub = 0; | |
891 | TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[i + 1]); | |
892 | } | |
893 | ||
894 | CHECK_ALIGN(&TxIsocEPList[i]); | |
895 | TxIsocEPList[i].hw_len = 0; | |
896 | ||
897 | /* Must enable the last EP descr to get eof interrupt. */ | |
898 | TxIsocEPList[i].command = (IO_STATE(USB_EP_command, enable, yes) | | |
899 | IO_STATE(USB_EP_command, eof, yes) | | |
900 | IO_STATE(USB_EP_command, eol, yes) | | |
901 | IO_FIELD(USB_EP_command, epid, INVALID_EPID)); | |
902 | TxIsocEPList[i].sub = virt_to_phys(&TxIsocSB_zout); | |
903 | TxIsocEPList[i].next = virt_to_phys(&TxIsocEPList[0]); | |
904 | ||
905 | *R_DMA_CH8_SUB3_EP = virt_to_phys(&TxIsocEPList[0]); | |
906 | *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start); | |
907 | ||
908 | DBFEXIT; | |
909 | } | |
910 | ||
911 | static void etrax_usb_unlink_intr_urb(struct urb *urb) | |
912 | { | |
913 | volatile USB_EP_Desc_t *first_ep; /* First EP in the list. */ | |
914 | volatile USB_EP_Desc_t *curr_ep; /* Current EP, the iterator. */ | |
915 | volatile USB_EP_Desc_t *next_ep; /* The EP after current. */ | |
916 | volatile USB_EP_Desc_t *unlink_ep; /* The one we should remove from the list. */ | |
917 | ||
918 | int epid; | |
919 | ||
920 | /* Read 8.8.4 in Designer's Reference, "Removing an EP Descriptor from the List". */ | |
921 | ||
922 | DBFENTER; | |
923 | ||
924 | epid = ((etrax_urb_priv_t *)urb->hcpriv)->epid; | |
925 | ||
926 | first_ep = &TxIntrEPList[0]; | |
927 | curr_ep = first_ep; | |
928 | ||
929 | ||
930 | /* Note that this loop removes all EP descriptors with this epid. This assumes | |
931 | that all EP descriptors belong to the one and only urb for this epid. */ | |
932 | ||
933 | do { | |
934 | next_ep = (USB_EP_Desc_t *)phys_to_virt(curr_ep->next); | |
935 | ||
936 | if (IO_EXTRACT(USB_EP_command, epid, next_ep->command) == epid) { | |
937 | ||
938 | dbg_intr("Found EP to unlink for epid %d", epid); | |
939 | ||
940 | /* This is the one we should unlink. */ | |
941 | unlink_ep = next_ep; | |
942 | ||
943 | /* Actually unlink the EP from the DMA list. */ | |
944 | curr_ep->next = unlink_ep->next; | |
945 | ||
946 | /* Wait until the DMA is no longer at this descriptor. */ | |
947 | while (*R_DMA_CH8_SUB2_EP == virt_to_phys(unlink_ep)); | |
948 | ||
949 | /* Now we are free to remove it and its SB descriptor. | |
950 | Note that it is assumed here that there is only one sb in the | |
951 | sb list for this ep. */ | |
952 | kmem_cache_free(usb_desc_cache, phys_to_virt(unlink_ep->sub)); | |
953 | kmem_cache_free(usb_desc_cache, (USB_EP_Desc_t *)unlink_ep); | |
954 | } | |
955 | ||
956 | curr_ep = phys_to_virt(curr_ep->next); | |
957 | ||
958 | } while (curr_ep != first_ep); | |
959 | urb->hcpriv = NULL; | |
960 | } | |
961 | ||
962 | void etrax_usb_do_intr_recover(int epid) | |
963 | { | |
964 | USB_EP_Desc_t *first_ep, *tmp_ep; | |
965 | ||
966 | DBFENTER; | |
967 | ||
968 | first_ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB2_EP); | |
969 | tmp_ep = first_ep; | |
970 | ||
971 | /* What this does is simply to walk the list of interrupt | |
972 | ep descriptors and enable those that are disabled. */ | |
973 | ||
974 | do { | |
975 | if (IO_EXTRACT(USB_EP_command, epid, tmp_ep->command) == epid && | |
976 | !(tmp_ep->command & IO_MASK(USB_EP_command, enable))) { | |
977 | tmp_ep->command |= IO_STATE(USB_EP_command, enable, yes); | |
978 | } | |
979 | ||
980 | tmp_ep = (USB_EP_Desc_t *)phys_to_virt(tmp_ep->next); | |
981 | ||
982 | } while (tmp_ep != first_ep); | |
983 | ||
984 | ||
985 | DBFEXIT; | |
986 | } | |
987 | ||
988 | static int etrax_rh_unlink_urb (struct urb *urb) | |
989 | { | |
990 | etrax_hc_t *hc; | |
991 | ||
992 | DBFENTER; | |
993 | ||
994 | hc = urb->dev->bus->hcpriv; | |
995 | ||
996 | if (hc->rh.urb == urb) { | |
997 | hc->rh.send = 0; | |
998 | del_timer(&hc->rh.rh_int_timer); | |
999 | } | |
1000 | ||
1001 | DBFEXIT; | |
1002 | return 0; | |
1003 | } | |
1004 | ||
1005 | static void etrax_rh_send_irq(struct urb *urb) | |
1006 | { | |
1007 | __u16 data = 0; | |
1008 | etrax_hc_t *hc = urb->dev->bus->hcpriv; | |
1009 | DBFENTER; | |
1010 | ||
1011 | /* | |
1012 | dbg_rh("R_USB_FM_NUMBER : 0x%08X", *R_USB_FM_NUMBER); | |
1013 | dbg_rh("R_USB_FM_REMAINING: 0x%08X", *R_USB_FM_REMAINING); | |
1014 | */ | |
1015 | ||
1016 | data |= (hc->rh.wPortChange_1) ? (1 << 1) : 0; | |
1017 | data |= (hc->rh.wPortChange_2) ? (1 << 2) : 0; | |
1018 | ||
1019 | *((__u16 *)urb->transfer_buffer) = cpu_to_le16(data); | |
1020 | /* FIXME: Why is actual_length set to 1 when data is 2 bytes? | |
1021 | Since only 1 byte is used, why not declare data as __u8? */ | |
1022 | urb->actual_length = 1; | |
1023 | urb->status = 0; | |
1024 | ||
1025 | if (hc->rh.send && urb->complete) { | |
1026 | dbg_rh("wPortChange_1: 0x%04X", hc->rh.wPortChange_1); | |
1027 | dbg_rh("wPortChange_2: 0x%04X", hc->rh.wPortChange_2); | |
1028 | ||
1029 | urb->complete(urb, NULL); | |
1030 | } | |
1031 | ||
1032 | DBFEXIT; | |
1033 | } | |
1034 | ||
1035 | static void etrax_rh_init_int_timer(struct urb *urb) | |
1036 | { | |
1037 | etrax_hc_t *hc; | |
1038 | ||
1039 | DBFENTER; | |
1040 | ||
1041 | hc = urb->dev->bus->hcpriv; | |
1042 | hc->rh.interval = urb->interval; | |
1043 | init_timer(&hc->rh.rh_int_timer); | |
1044 | hc->rh.rh_int_timer.function = etrax_rh_int_timer_do; | |
1045 | hc->rh.rh_int_timer.data = (unsigned long)urb; | |
1046 | /* FIXME: Is the jiffies resolution enough? All intervals < 10 ms will be mapped | |
1047 | to 0, and the rest to the nearest lower 10 ms. */ | |
1048 | hc->rh.rh_int_timer.expires = jiffies + ((HZ * hc->rh.interval) / 1000); | |
1049 | add_timer(&hc->rh.rh_int_timer); | |
1050 | ||
1051 | DBFEXIT; | |
1052 | } | |
1053 | ||
1054 | static void etrax_rh_int_timer_do(unsigned long ptr) | |
1055 | { | |
1056 | struct urb *urb; | |
1057 | etrax_hc_t *hc; | |
1058 | ||
1059 | DBFENTER; | |
1060 | ||
1061 | urb = (struct urb*)ptr; | |
1062 | hc = urb->dev->bus->hcpriv; | |
1063 | ||
1064 | if (hc->rh.send) { | |
1065 | etrax_rh_send_irq(urb); | |
1066 | } | |
1067 | ||
1068 | DBFEXIT; | |
1069 | } | |
1070 | ||
1071 | static int etrax_usb_setup_epid(struct urb *urb) | |
1072 | { | |
1073 | int epid; | |
1074 | char devnum, endpoint, out_traffic, slow; | |
1075 | int maxlen; | |
1076 | unsigned long flags; | |
1077 | ||
1078 | DBFENTER; | |
1079 | ||
1080 | epid = etrax_usb_lookup_epid(urb); | |
1081 | if ((epid != -1)){ | |
1082 | /* An epid that fits this urb has been found. */ | |
1083 | DBFEXIT; | |
1084 | return epid; | |
1085 | } | |
1086 | ||
1087 | /* We must find and initiate a new epid for this urb. */ | |
1088 | epid = etrax_usb_allocate_epid(); | |
1089 | ||
1090 | if (epid == -1) { | |
1091 | /* Failed to allocate a new epid. */ | |
1092 | DBFEXIT; | |
1093 | return epid; | |
1094 | } | |
1095 | ||
1096 | /* We now have a new epid to use. Initiate it. */ | |
1097 | set_bit(epid, (void *)&epid_usage_bitmask); | |
1098 | ||
1099 | devnum = usb_pipedevice(urb->pipe); | |
1100 | endpoint = usb_pipeendpoint(urb->pipe); | |
1101 | slow = usb_pipeslow(urb->pipe); | |
1102 | maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)); | |
1103 | if (usb_pipetype(urb->pipe) == PIPE_CONTROL) { | |
1104 | /* We want both IN and OUT control traffic to be put on the same EP/SB list. */ | |
1105 | out_traffic = 1; | |
1106 | } else { | |
1107 | out_traffic = usb_pipeout(urb->pipe); | |
1108 | } | |
1109 | ||
1110 | save_flags(flags); | |
1111 | cli(); | |
1112 | ||
1113 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
1114 | nop(); | |
1115 | ||
1116 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1117 | *R_USB_EPT_DATA_ISO = IO_STATE(R_USB_EPT_DATA_ISO, valid, yes) | | |
1118 | /* FIXME: Change any to the actual port? */ | |
1119 | IO_STATE(R_USB_EPT_DATA_ISO, port, any) | | |
1120 | IO_FIELD(R_USB_EPT_DATA_ISO, max_len, maxlen) | | |
1121 | IO_FIELD(R_USB_EPT_DATA_ISO, ep, endpoint) | | |
1122 | IO_FIELD(R_USB_EPT_DATA_ISO, dev, devnum); | |
1123 | } else { | |
1124 | *R_USB_EPT_DATA = IO_STATE(R_USB_EPT_DATA, valid, yes) | | |
1125 | IO_FIELD(R_USB_EPT_DATA, low_speed, slow) | | |
1126 | /* FIXME: Change any to the actual port? */ | |
1127 | IO_STATE(R_USB_EPT_DATA, port, any) | | |
1128 | IO_FIELD(R_USB_EPT_DATA, max_len, maxlen) | | |
1129 | IO_FIELD(R_USB_EPT_DATA, ep, endpoint) | | |
1130 | IO_FIELD(R_USB_EPT_DATA, dev, devnum); | |
1131 | } | |
1132 | ||
1133 | restore_flags(flags); | |
1134 | ||
1135 | if (out_traffic) { | |
1136 | set_bit(epid, (void *)&epid_out_traffic); | |
1137 | } else { | |
1138 | clear_bit(epid, (void *)&epid_out_traffic); | |
1139 | } | |
1140 | ||
1141 | dbg_epid("Setting up epid %d with devnum %d, endpoint %d and max_len %d (%s)", | |
1142 | epid, devnum, endpoint, maxlen, out_traffic ? "OUT" : "IN"); | |
1143 | ||
1144 | DBFEXIT; | |
1145 | return epid; | |
1146 | } | |
1147 | ||
1148 | static void etrax_usb_free_epid(int epid) | |
1149 | { | |
1150 | unsigned long flags; | |
1151 | ||
1152 | DBFENTER; | |
1153 | ||
1154 | if (!test_bit(epid, (void *)&epid_usage_bitmask)) { | |
1155 | warn("Trying to free unused epid %d", epid); | |
1156 | DBFEXIT; | |
1157 | return; | |
1158 | } | |
1159 | ||
1160 | save_flags(flags); | |
1161 | cli(); | |
1162 | ||
1163 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
1164 | nop(); | |
1165 | while (*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)); | |
1166 | /* This will, among other things, set the valid field to 0. */ | |
1167 | *R_USB_EPT_DATA = 0; | |
1168 | restore_flags(flags); | |
1169 | ||
1170 | clear_bit(epid, (void *)&epid_usage_bitmask); | |
1171 | ||
1172 | ||
1173 | dbg_epid("Freed epid %d", epid); | |
1174 | ||
1175 | DBFEXIT; | |
1176 | } | |
1177 | ||
1178 | static int etrax_usb_lookup_epid(struct urb *urb) | |
1179 | { | |
1180 | int i; | |
1181 | __u32 data; | |
1182 | char devnum, endpoint, slow, out_traffic; | |
1183 | int maxlen; | |
1184 | unsigned long flags; | |
1185 | ||
1186 | DBFENTER; | |
1187 | ||
1188 | devnum = usb_pipedevice(urb->pipe); | |
1189 | endpoint = usb_pipeendpoint(urb->pipe); | |
1190 | slow = usb_pipeslow(urb->pipe); | |
1191 | maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)); | |
1192 | if (usb_pipetype(urb->pipe) == PIPE_CONTROL) { | |
1193 | /* We want both IN and OUT control traffic to be put on the same EP/SB list. */ | |
1194 | out_traffic = 1; | |
1195 | } else { | |
1196 | out_traffic = usb_pipeout(urb->pipe); | |
1197 | } | |
1198 | ||
1199 | /* Step through att epids. */ | |
1200 | for (i = 0; i < NBR_OF_EPIDS; i++) { | |
1201 | if (test_bit(i, (void *)&epid_usage_bitmask) && | |
1202 | test_bit(i, (void *)&epid_out_traffic) == out_traffic) { | |
1203 | ||
1204 | save_flags(flags); | |
1205 | cli(); | |
1206 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, i); | |
1207 | nop(); | |
1208 | ||
1209 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1210 | data = *R_USB_EPT_DATA_ISO; | |
1211 | restore_flags(flags); | |
1212 | ||
1213 | if ((IO_MASK(R_USB_EPT_DATA_ISO, valid) & data) && | |
1214 | (IO_EXTRACT(R_USB_EPT_DATA_ISO, dev, data) == devnum) && | |
1215 | (IO_EXTRACT(R_USB_EPT_DATA_ISO, ep, data) == endpoint) && | |
1216 | (IO_EXTRACT(R_USB_EPT_DATA_ISO, max_len, data) == maxlen)) { | |
1217 | dbg_epid("Found epid %d for devnum %d, endpoint %d (%s)", | |
1218 | i, devnum, endpoint, out_traffic ? "OUT" : "IN"); | |
1219 | DBFEXIT; | |
1220 | return i; | |
1221 | } | |
1222 | } else { | |
1223 | data = *R_USB_EPT_DATA; | |
1224 | restore_flags(flags); | |
1225 | ||
1226 | if ((IO_MASK(R_USB_EPT_DATA, valid) & data) && | |
1227 | (IO_EXTRACT(R_USB_EPT_DATA, dev, data) == devnum) && | |
1228 | (IO_EXTRACT(R_USB_EPT_DATA, ep, data) == endpoint) && | |
1229 | (IO_EXTRACT(R_USB_EPT_DATA, low_speed, data) == slow) && | |
1230 | (IO_EXTRACT(R_USB_EPT_DATA, max_len, data) == maxlen)) { | |
1231 | dbg_epid("Found epid %d for devnum %d, endpoint %d (%s)", | |
1232 | i, devnum, endpoint, out_traffic ? "OUT" : "IN"); | |
1233 | DBFEXIT; | |
1234 | return i; | |
1235 | } | |
1236 | } | |
1237 | } | |
1238 | } | |
1239 | ||
1240 | DBFEXIT; | |
1241 | return -1; | |
1242 | } | |
1243 | ||
1244 | static int etrax_usb_allocate_epid(void) | |
1245 | { | |
1246 | int i; | |
1247 | ||
1248 | DBFENTER; | |
1249 | ||
1250 | for (i = 0; i < NBR_OF_EPIDS; i++) { | |
1251 | if (!test_bit(i, (void *)&epid_usage_bitmask)) { | |
1252 | dbg_epid("Found free epid %d", i); | |
1253 | DBFEXIT; | |
1254 | return i; | |
1255 | } | |
1256 | } | |
1257 | ||
1258 | dbg_epid("Found no free epids"); | |
1259 | DBFEXIT; | |
1260 | return -1; | |
1261 | } | |
1262 | ||
5db539e4 | 1263 | static int etrax_usb_submit_urb(struct urb *urb, unsigned mem_flags) |
1da177e4 LT |
1264 | { |
1265 | etrax_hc_t *hc; | |
1266 | int ret = -EINVAL; | |
1267 | ||
1268 | DBFENTER; | |
1269 | ||
1270 | if (!urb->dev || !urb->dev->bus) { | |
1271 | return -ENODEV; | |
1272 | } | |
1273 | if (usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)) <= 0) { | |
1274 | info("Submit urb to pipe with maxpacketlen 0, pipe 0x%X\n", urb->pipe); | |
1275 | return -EMSGSIZE; | |
1276 | } | |
1277 | ||
1278 | if (urb->timeout) { | |
1279 | /* FIXME. */ | |
1280 | warn("urb->timeout specified, ignoring."); | |
1281 | } | |
1282 | ||
1283 | hc = (etrax_hc_t*)urb->dev->bus->hcpriv; | |
1284 | ||
1285 | if (usb_pipedevice(urb->pipe) == hc->rh.devnum) { | |
1286 | /* This request is for the Virtual Root Hub. */ | |
1287 | ret = etrax_rh_submit_urb(urb); | |
1288 | ||
1289 | } else if (usb_pipetype(urb->pipe) == PIPE_BULK) { | |
1290 | ||
1291 | ret = etrax_usb_submit_bulk_urb(urb); | |
1292 | ||
1293 | } else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) { | |
1294 | ||
1295 | ret = etrax_usb_submit_ctrl_urb(urb); | |
1296 | ||
1297 | } else if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) { | |
1298 | int bustime; | |
1299 | ||
1300 | if (urb->bandwidth == 0) { | |
1301 | bustime = usb_check_bandwidth(urb->dev, urb); | |
1302 | if (bustime < 0) { | |
1303 | ret = bustime; | |
1304 | } else { | |
1305 | ret = etrax_usb_submit_intr_urb(urb); | |
1306 | if (ret == 0) | |
1307 | usb_claim_bandwidth(urb->dev, urb, bustime, 0); | |
1308 | } | |
1309 | } else { | |
1310 | /* Bandwidth already set. */ | |
1311 | ret = etrax_usb_submit_intr_urb(urb); | |
1312 | } | |
1313 | ||
1314 | } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1315 | int bustime; | |
1316 | ||
1317 | if (urb->bandwidth == 0) { | |
1318 | bustime = usb_check_bandwidth(urb->dev, urb); | |
1319 | if (bustime < 0) { | |
1320 | ret = bustime; | |
1321 | } else { | |
1322 | ret = etrax_usb_submit_isoc_urb(urb); | |
1323 | if (ret == 0) | |
1324 | usb_claim_bandwidth(urb->dev, urb, bustime, 0); | |
1325 | } | |
1326 | } else { | |
1327 | /* Bandwidth already set. */ | |
1328 | ret = etrax_usb_submit_isoc_urb(urb); | |
1329 | } | |
1330 | } | |
1331 | ||
1332 | DBFEXIT; | |
1333 | ||
1334 | if (ret != 0) | |
1335 | printk("Submit URB error %d\n", ret); | |
1336 | ||
1337 | return ret; | |
1338 | } | |
1339 | ||
1340 | static int etrax_usb_unlink_urb(struct urb *urb, int status) | |
1341 | { | |
1342 | etrax_hc_t *hc; | |
1343 | etrax_urb_priv_t *urb_priv; | |
1344 | int epid; | |
1345 | unsigned int flags; | |
1346 | ||
1347 | DBFENTER; | |
1348 | ||
1349 | if (!urb) { | |
1350 | return -EINVAL; | |
1351 | } | |
1352 | ||
1353 | /* Disable interrupts here since a descriptor interrupt for the isoc epid | |
1354 | will modify the sb list. This could possibly be done more granular, but | |
1355 | unlink_urb should not be used frequently anyway. | |
1356 | */ | |
1357 | ||
1358 | save_flags(flags); | |
1359 | cli(); | |
1360 | ||
1361 | if (!urb->dev || !urb->dev->bus) { | |
1362 | restore_flags(flags); | |
1363 | return -ENODEV; | |
1364 | } | |
1365 | if (!urb->hcpriv) { | |
1366 | /* This happens if a device driver calls unlink on an urb that | |
1367 | was never submitted (lazy driver) or if the urb was completed | |
1368 | while unlink was being called. */ | |
1369 | restore_flags(flags); | |
1370 | return 0; | |
1371 | } | |
1372 | if (urb->transfer_flags & URB_ASYNC_UNLINK) { | |
1373 | /* FIXME. */ | |
1374 | /* If URB_ASYNC_UNLINK is set: | |
1375 | unlink | |
1376 | move to a separate urb list | |
1377 | call complete at next sof with ECONNRESET | |
1378 | ||
1379 | If not: | |
1380 | wait 1 ms | |
1381 | unlink | |
1382 | call complete with ENOENT | |
1383 | */ | |
1384 | warn("URB_ASYNC_UNLINK set, ignoring."); | |
1385 | } | |
1386 | ||
1387 | /* One might think that urb->status = -EINPROGRESS would be a requirement for unlinking, | |
1388 | but that doesn't work for interrupt and isochronous traffic since they are completed | |
1389 | repeatedly, and urb->status is set then. That may in itself be a bug though. */ | |
1390 | ||
1391 | hc = urb->dev->bus->hcpriv; | |
1392 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
1393 | epid = urb_priv->epid; | |
1394 | ||
1395 | /* Set the urb status (synchronous unlink). */ | |
1396 | urb->status = -ENOENT; | |
1397 | urb_priv->urb_state = UNLINK; | |
1398 | ||
1399 | if (usb_pipedevice(urb->pipe) == hc->rh.devnum) { | |
1400 | int ret; | |
1401 | ret = etrax_rh_unlink_urb(urb); | |
1402 | DBFEXIT; | |
1403 | restore_flags(flags); | |
1404 | return ret; | |
1405 | ||
1406 | } else if (usb_pipetype(urb->pipe) == PIPE_BULK) { | |
1407 | ||
1408 | dbg_bulk("Unlink of bulk urb (0x%lx)", (unsigned long)urb); | |
1409 | ||
1410 | if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) { | |
1411 | /* The EP was enabled, disable it and wait. */ | |
1412 | TxBulkEPList[epid].command &= ~IO_MASK(USB_EP_command, enable); | |
1413 | ||
1414 | /* Ah, the luxury of busy-wait. */ | |
1415 | while (*R_DMA_CH8_SUB0_EP == virt_to_phys(&TxBulkEPList[epid])); | |
1416 | } | |
1417 | /* Kicking dummy list out of the party. */ | |
1418 | TxBulkEPList[epid].next = virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]); | |
1419 | ||
1420 | } else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) { | |
1421 | ||
1422 | dbg_ctrl("Unlink of ctrl urb (0x%lx)", (unsigned long)urb); | |
1423 | ||
1424 | if (TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable)) { | |
1425 | /* The EP was enabled, disable it and wait. */ | |
1426 | TxCtrlEPList[epid].command &= ~IO_MASK(USB_EP_command, enable); | |
1427 | ||
1428 | /* Ah, the luxury of busy-wait. */ | |
1429 | while (*R_DMA_CH8_SUB1_EP == virt_to_phys(&TxCtrlEPList[epid])); | |
1430 | } | |
1431 | ||
1432 | } else if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) { | |
1433 | ||
1434 | dbg_intr("Unlink of intr urb (0x%lx)", (unsigned long)urb); | |
1435 | ||
1436 | /* Separate function because it's a tad more complicated. */ | |
1437 | etrax_usb_unlink_intr_urb(urb); | |
1438 | ||
1439 | } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1440 | ||
1441 | dbg_isoc("Unlink of isoc urb (0x%lx)", (unsigned long)urb); | |
1442 | ||
1443 | if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) { | |
1444 | /* The EP was enabled, disable it and wait. */ | |
1445 | TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable); | |
1446 | ||
1447 | /* Ah, the luxury of busy-wait. */ | |
1448 | while (*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid])); | |
1449 | } | |
1450 | } | |
1451 | ||
1452 | /* Note that we need to remove the urb from the urb list *before* removing its SB | |
1453 | descriptors. (This means that the isoc eof handler might get a null urb when we | |
1454 | are unlinking the last urb.) */ | |
1455 | ||
1456 | if (usb_pipetype(urb->pipe) == PIPE_BULK) { | |
1457 | ||
1458 | urb_list_del(urb, epid); | |
1459 | TxBulkEPList[epid].sub = 0; | |
1460 | etrax_remove_from_sb_list(urb); | |
1461 | ||
1462 | } else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) { | |
1463 | ||
1464 | urb_list_del(urb, epid); | |
1465 | TxCtrlEPList[epid].sub = 0; | |
1466 | etrax_remove_from_sb_list(urb); | |
1467 | ||
1468 | } else if (usb_pipetype(urb->pipe) == PIPE_INTERRUPT) { | |
1469 | ||
1470 | urb_list_del(urb, epid); | |
1471 | /* Sanity check (should never happen). */ | |
1472 | assert(urb_list_empty(epid)); | |
1473 | ||
1474 | /* Release allocated bandwidth. */ | |
1475 | usb_release_bandwidth(urb->dev, urb, 0); | |
1476 | ||
1477 | } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1478 | ||
1479 | if (usb_pipeout(urb->pipe)) { | |
1480 | ||
1481 | USB_SB_Desc_t *iter_sb, *prev_sb, *next_sb; | |
1482 | ||
1483 | if (__urb_list_entry(urb, epid)) { | |
1484 | ||
1485 | urb_list_del(urb, epid); | |
1486 | iter_sb = TxIsocEPList[epid].sub ? phys_to_virt(TxIsocEPList[epid].sub) : 0; | |
1487 | prev_sb = 0; | |
1488 | while (iter_sb && (iter_sb != urb_priv->first_sb)) { | |
1489 | prev_sb = iter_sb; | |
1490 | iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0; | |
1491 | } | |
1492 | ||
1493 | if (iter_sb == 0) { | |
1494 | /* Unlink of the URB currently being transmitted. */ | |
1495 | prev_sb = 0; | |
1496 | iter_sb = TxIsocEPList[epid].sub ? phys_to_virt(TxIsocEPList[epid].sub) : 0; | |
1497 | } | |
1498 | ||
1499 | while (iter_sb && (iter_sb != urb_priv->last_sb)) { | |
1500 | iter_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0; | |
1501 | } | |
1502 | if (iter_sb) { | |
1503 | next_sb = iter_sb->next ? phys_to_virt(iter_sb->next) : 0; | |
1504 | } else { | |
1505 | /* This should only happen if the DMA has completed | |
1506 | processing the SB list for this EP while interrupts | |
1507 | are disabled. */ | |
1508 | dbg_isoc("Isoc urb not found, already sent?"); | |
1509 | next_sb = 0; | |
1510 | } | |
1511 | if (prev_sb) { | |
1512 | prev_sb->next = next_sb ? virt_to_phys(next_sb) : 0; | |
1513 | } else { | |
1514 | TxIsocEPList[epid].sub = next_sb ? virt_to_phys(next_sb) : 0; | |
1515 | } | |
1516 | ||
1517 | etrax_remove_from_sb_list(urb); | |
1518 | if (urb_list_empty(epid)) { | |
1519 | TxIsocEPList[epid].sub = 0; | |
1520 | dbg_isoc("Last isoc out urb epid %d", epid); | |
1521 | } else if (next_sb || prev_sb) { | |
1522 | dbg_isoc("Re-enable isoc out epid %d", epid); | |
1523 | ||
1524 | TxIsocEPList[epid].hw_len = 0; | |
1525 | TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes); | |
1526 | } else { | |
1527 | TxIsocEPList[epid].sub = 0; | |
1528 | dbg_isoc("URB list non-empty and no SB list, EP disabled"); | |
1529 | } | |
1530 | } else { | |
1531 | dbg_isoc("Urb 0x%p not found, completed already?", urb); | |
1532 | } | |
1533 | } else { | |
1534 | ||
1535 | urb_list_del(urb, epid); | |
1536 | ||
1537 | /* For in traffic there is only one SB descriptor for each EP even | |
1538 | though there may be several urbs (all urbs point at the same SB). */ | |
1539 | if (urb_list_empty(epid)) { | |
1540 | /* No more urbs, remove the SB. */ | |
1541 | TxIsocEPList[epid].sub = 0; | |
1542 | etrax_remove_from_sb_list(urb); | |
1543 | } else { | |
1544 | TxIsocEPList[epid].hw_len = 0; | |
1545 | TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes); | |
1546 | } | |
1547 | } | |
1548 | /* Release allocated bandwidth. */ | |
1549 | usb_release_bandwidth(urb->dev, urb, 1); | |
1550 | } | |
1551 | /* Free the epid if urb list is empty. */ | |
1552 | if (urb_list_empty(epid)) { | |
1553 | etrax_usb_free_epid(epid); | |
1554 | } | |
1555 | restore_flags(flags); | |
1556 | ||
1557 | /* Must be done before calling completion handler. */ | |
1558 | kfree(urb_priv); | |
1559 | urb->hcpriv = 0; | |
1560 | ||
1561 | if (urb->complete) { | |
1562 | urb->complete(urb, NULL); | |
1563 | } | |
1564 | ||
1565 | DBFEXIT; | |
1566 | return 0; | |
1567 | } | |
1568 | ||
1569 | static int etrax_usb_get_frame_number(struct usb_device *usb_dev) | |
1570 | { | |
1571 | DBFENTER; | |
1572 | DBFEXIT; | |
1573 | return (*R_USB_FM_NUMBER & 0x7ff); | |
1574 | } | |
1575 | ||
7d12e780 | 1576 | static irqreturn_t etrax_usb_tx_interrupt(int irq, void *vhc) |
1da177e4 LT |
1577 | { |
1578 | DBFENTER; | |
1579 | ||
1580 | /* This interrupt handler could be used when unlinking EP descriptors. */ | |
1581 | ||
1582 | if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub0_descr)) { | |
1583 | USB_EP_Desc_t *ep; | |
1584 | ||
1585 | //dbg_bulk("dma8_sub0_descr (BULK) intr."); | |
1586 | ||
1587 | /* It should be safe clearing the interrupt here, since we don't expect to get a new | |
1588 | one until we restart the bulk channel. */ | |
1589 | *R_DMA_CH8_SUB0_CLR_INTR = IO_STATE(R_DMA_CH8_SUB0_CLR_INTR, clr_descr, do); | |
1590 | ||
1591 | /* Wait while the DMA is running (though we don't expect it to be). */ | |
1592 | while (*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd)); | |
1593 | ||
1594 | /* Advance the DMA to the next EP descriptor. */ | |
1595 | ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB0_EP); | |
1596 | ||
1597 | //dbg_bulk("descr intr: DMA is at 0x%lx", (unsigned long)ep); | |
1598 | ||
1599 | /* ep->next is already a physical address; no need for a virt_to_phys. */ | |
1600 | *R_DMA_CH8_SUB0_EP = ep->next; | |
1601 | ||
1602 | /* Start the DMA bulk channel again. */ | |
1603 | *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); | |
1604 | } | |
1605 | if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub1_descr)) { | |
1606 | struct urb *urb; | |
1607 | int epid; | |
1608 | etrax_urb_priv_t *urb_priv; | |
1609 | unsigned long int flags; | |
1610 | ||
1611 | dbg_ctrl("dma8_sub1_descr (CTRL) intr."); | |
1612 | *R_DMA_CH8_SUB1_CLR_INTR = IO_STATE(R_DMA_CH8_SUB1_CLR_INTR, clr_descr, do); | |
1613 | ||
1614 | /* The complete callback gets called so we cli. */ | |
1615 | save_flags(flags); | |
1616 | cli(); | |
1617 | ||
1618 | for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) { | |
1619 | if ((TxCtrlEPList[epid].sub == 0) || | |
1620 | (epid == DUMMY_EPID) || | |
1621 | (epid == INVALID_EPID)) { | |
1622 | /* Nothing here to see. */ | |
1623 | continue; | |
1624 | } | |
1625 | ||
1626 | /* Get the first urb (if any). */ | |
1627 | urb = urb_list_first(epid); | |
1628 | ||
1629 | if (urb) { | |
1630 | ||
1631 | /* Sanity check. */ | |
1632 | assert(usb_pipetype(urb->pipe) == PIPE_CONTROL); | |
1633 | ||
1634 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
1635 | assert(urb_priv); | |
1636 | ||
1637 | if (urb_priv->urb_state == WAITING_FOR_DESCR_INTR) { | |
1638 | assert(!(TxCtrlEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable))); | |
1639 | ||
1640 | etrax_usb_complete_urb(urb, 0); | |
1641 | } | |
1642 | } | |
1643 | } | |
1644 | restore_flags(flags); | |
1645 | } | |
1646 | if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub2_descr)) { | |
1647 | dbg_intr("dma8_sub2_descr (INTR) intr."); | |
1648 | *R_DMA_CH8_SUB2_CLR_INTR = IO_STATE(R_DMA_CH8_SUB2_CLR_INTR, clr_descr, do); | |
1649 | } | |
1650 | if (*R_IRQ_READ2 & IO_MASK(R_IRQ_READ2, dma8_sub3_descr)) { | |
1651 | struct urb *urb; | |
1652 | int epid; | |
1653 | int epid_done; | |
1654 | etrax_urb_priv_t *urb_priv; | |
1655 | USB_SB_Desc_t *sb_desc; | |
1656 | ||
1657 | usb_isoc_complete_data_t *comp_data = NULL; | |
1658 | ||
1659 | /* One or more isoc out transfers are done. */ | |
1660 | dbg_isoc("dma8_sub3_descr (ISOC) intr."); | |
1661 | ||
1662 | /* For each isoc out EP search for the first sb_desc with the intr flag | |
1663 | set. This descriptor must be the last packet from an URB. Then | |
1664 | traverse the URB list for the EP until the URB with urb_priv->last_sb | |
1665 | matching the intr-marked sb_desc is found. All URBs before this have | |
1666 | been sent. | |
1667 | */ | |
1668 | ||
1669 | for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) { | |
1670 | /* Skip past epids with no SB lists, epids used for in traffic, | |
1671 | and special (dummy, invalid) epids. */ | |
1672 | if ((TxIsocEPList[epid].sub == 0) || | |
1673 | (test_bit(epid, (void *)&epid_out_traffic) == 0) || | |
1674 | (epid == DUMMY_EPID) || | |
1675 | (epid == INVALID_EPID)) { | |
1676 | /* Nothing here to see. */ | |
1677 | continue; | |
1678 | } | |
1679 | sb_desc = phys_to_virt(TxIsocEPList[epid].sub); | |
1680 | ||
1681 | /* Find the last descriptor of the currently active URB for this ep. | |
1682 | This is the first descriptor in the sub list marked for a descriptor | |
1683 | interrupt. */ | |
1684 | while (sb_desc && !IO_EXTRACT(USB_SB_command, intr, sb_desc->command)) { | |
1685 | sb_desc = sb_desc->next ? phys_to_virt(sb_desc->next) : 0; | |
1686 | } | |
1687 | assert(sb_desc); | |
1688 | ||
1689 | dbg_isoc("Check epid %d, sub 0x%p, SB 0x%p", | |
1690 | epid, | |
1691 | phys_to_virt(TxIsocEPList[epid].sub), | |
1692 | sb_desc); | |
1693 | ||
1694 | epid_done = 0; | |
1695 | ||
1696 | /* Get the first urb (if any). */ | |
1697 | urb = urb_list_first(epid); | |
1698 | assert(urb); | |
1699 | ||
1700 | while (urb && !epid_done) { | |
1701 | ||
1702 | /* Sanity check. */ | |
1703 | assert(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS); | |
1704 | ||
1705 | if (!usb_pipeout(urb->pipe)) { | |
1706 | /* descr interrupts are generated only for out pipes. */ | |
1707 | epid_done = 1; | |
1708 | continue; | |
1709 | } | |
1710 | ||
1711 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
1712 | assert(urb_priv); | |
1713 | ||
1714 | if (sb_desc != urb_priv->last_sb) { | |
1715 | ||
1716 | /* This urb has been sent. */ | |
1717 | dbg_isoc("out URB 0x%p sent", urb); | |
1718 | ||
1719 | urb_priv->urb_state = TRANSFER_DONE; | |
1720 | ||
1721 | } else if ((sb_desc == urb_priv->last_sb) && | |
1722 | !(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) { | |
1723 | ||
1724 | assert((sb_desc->command & IO_MASK(USB_SB_command, eol)) == IO_STATE(USB_SB_command, eol, yes)); | |
1725 | assert(sb_desc->next == 0); | |
1726 | ||
1727 | dbg_isoc("out URB 0x%p last in list, epid disabled", urb); | |
1728 | TxIsocEPList[epid].sub = 0; | |
1729 | TxIsocEPList[epid].hw_len = 0; | |
1730 | urb_priv->urb_state = TRANSFER_DONE; | |
1731 | ||
1732 | epid_done = 1; | |
1733 | ||
1734 | } else { | |
1735 | epid_done = 1; | |
1736 | } | |
1737 | if (!epid_done) { | |
1738 | urb = urb_list_next(urb, epid); | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | } | |
1743 | ||
1744 | *R_DMA_CH8_SUB3_CLR_INTR = IO_STATE(R_DMA_CH8_SUB3_CLR_INTR, clr_descr, do); | |
1745 | ||
54e6ecb2 | 1746 | comp_data = (usb_isoc_complete_data_t*)kmem_cache_alloc(isoc_compl_cache, GFP_ATOMIC); |
1da177e4 LT |
1747 | assert(comp_data != NULL); |
1748 | ||
1749 | INIT_WORK(&comp_data->usb_bh, etrax_usb_isoc_descr_interrupt_bottom_half, comp_data); | |
1750 | schedule_work(&comp_data->usb_bh); | |
1751 | } | |
1752 | ||
1753 | DBFEXIT; | |
1754 | return IRQ_HANDLED; | |
1755 | } | |
1756 | ||
1757 | static void etrax_usb_isoc_descr_interrupt_bottom_half(void *data) | |
1758 | { | |
1759 | usb_isoc_complete_data_t *comp_data = (usb_isoc_complete_data_t*)data; | |
1760 | ||
1761 | struct urb *urb; | |
1762 | int epid; | |
1763 | int epid_done; | |
1764 | etrax_urb_priv_t *urb_priv; | |
1765 | ||
1766 | DBFENTER; | |
1767 | ||
1768 | dbg_isoc("dma8_sub3_descr (ISOC) bottom half."); | |
1769 | ||
1770 | for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) { | |
1771 | unsigned long flags; | |
1772 | ||
1773 | save_flags(flags); | |
1774 | cli(); | |
1775 | ||
1776 | epid_done = 0; | |
1777 | ||
1778 | /* The descriptor interrupt handler has marked all transmitted isoch. out | |
1779 | URBs with TRANSFER_DONE. Now we traverse all epids and for all that | |
1780 | have isoch. out traffic traverse its URB list and complete the | |
1781 | transmitted URB. | |
1782 | */ | |
1783 | ||
1784 | while (!epid_done) { | |
1785 | ||
1786 | /* Get the first urb (if any). */ | |
1787 | urb = urb_list_first(epid); | |
1788 | if (urb == 0) { | |
1789 | epid_done = 1; | |
1790 | continue; | |
1791 | } | |
1792 | ||
1793 | if (usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) { | |
1794 | epid_done = 1; | |
1795 | continue; | |
1796 | } | |
1797 | ||
1798 | if (!usb_pipeout(urb->pipe)) { | |
1799 | /* descr interrupts are generated only for out pipes. */ | |
1800 | epid_done = 1; | |
1801 | continue; | |
1802 | } | |
1803 | ||
1804 | dbg_isoc("Check epid %d, SB 0x%p", epid, (char*)TxIsocEPList[epid].sub); | |
1805 | ||
1806 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
1807 | assert(urb_priv); | |
1808 | ||
1809 | if (urb_priv->urb_state == TRANSFER_DONE) { | |
1810 | int i; | |
1811 | struct usb_iso_packet_descriptor *packet; | |
1812 | ||
1813 | /* This urb has been sent. */ | |
1814 | dbg_isoc("Completing isoc out URB 0x%p", urb); | |
1815 | ||
1816 | for (i = 0; i < urb->number_of_packets; i++) { | |
1817 | packet = &urb->iso_frame_desc[i]; | |
1818 | packet->status = 0; | |
1819 | packet->actual_length = packet->length; | |
1820 | } | |
1821 | ||
1822 | etrax_usb_complete_isoc_urb(urb, 0); | |
1823 | ||
1824 | if (urb_list_empty(epid)) { | |
1825 | etrax_usb_free_epid(epid); | |
1826 | epid_done = 1; | |
1827 | } | |
1828 | } else { | |
1829 | epid_done = 1; | |
1830 | } | |
1831 | } | |
1832 | restore_flags(flags); | |
1833 | ||
1834 | } | |
1835 | kmem_cache_free(isoc_compl_cache, comp_data); | |
1836 | ||
1837 | DBFEXIT; | |
1838 | } | |
1839 | ||
1840 | ||
1841 | ||
7d12e780 | 1842 | static irqreturn_t etrax_usb_rx_interrupt(int irq, void *vhc) |
1da177e4 LT |
1843 | { |
1844 | struct urb *urb; | |
1845 | etrax_urb_priv_t *urb_priv; | |
1846 | int epid = 0; | |
1847 | unsigned long flags; | |
1848 | ||
1849 | /* Isoc diagnostics. */ | |
1850 | static int curr_fm = 0; | |
1851 | static int prev_fm = 0; | |
1852 | ||
1853 | DBFENTER; | |
1854 | ||
1855 | /* Clear this interrupt. */ | |
1856 | *R_DMA_CH9_CLR_INTR = IO_STATE(R_DMA_CH9_CLR_INTR, clr_eop, do); | |
1857 | ||
1858 | /* Note that this while loop assumes that all packets span only | |
1859 | one rx descriptor. */ | |
1860 | ||
1861 | /* The reason we cli here is that we call the driver's callback functions. */ | |
1862 | save_flags(flags); | |
1863 | cli(); | |
1864 | ||
1865 | while (myNextRxDesc->status & IO_MASK(USB_IN_status, eop)) { | |
1866 | ||
1867 | epid = IO_EXTRACT(USB_IN_status, epid, myNextRxDesc->status); | |
1868 | urb = urb_list_first(epid); | |
1869 | ||
1870 | //printk("eop for epid %d, first urb 0x%lx\n", epid, (unsigned long)urb); | |
1871 | ||
1872 | if (!urb) { | |
1873 | err("No urb for epid %d in rx interrupt", epid); | |
1874 | __dump_ept_data(epid); | |
1875 | goto skip_out; | |
1876 | } | |
1877 | ||
1878 | /* Note that we cannot indescriminately assert(usb_pipein(urb->pipe)) since | |
1879 | ctrl pipes are not. */ | |
1880 | ||
1881 | if (myNextRxDesc->status & IO_MASK(USB_IN_status, error)) { | |
1882 | __u32 r_usb_ept_data; | |
1883 | int no_error = 0; | |
1884 | ||
1885 | assert(test_bit(epid, (void *)&epid_usage_bitmask)); | |
1886 | ||
1887 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
1888 | nop(); | |
1889 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1890 | r_usb_ept_data = *R_USB_EPT_DATA_ISO; | |
1891 | ||
1892 | if ((r_usb_ept_data & IO_MASK(R_USB_EPT_DATA_ISO, valid)) && | |
1893 | (IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data) == 0) && | |
1894 | (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata))) { | |
1895 | /* Not an error, just a failure to receive an expected iso | |
1896 | in packet in this frame. This is not documented | |
1897 | in the designers reference. | |
1898 | */ | |
1899 | no_error++; | |
1900 | } else { | |
1901 | warn("R_USB_EPT_DATA_ISO for epid %d = 0x%x", epid, r_usb_ept_data); | |
1902 | } | |
1903 | } else { | |
1904 | r_usb_ept_data = *R_USB_EPT_DATA; | |
1905 | warn("R_USB_EPT_DATA for epid %d = 0x%x", epid, r_usb_ept_data); | |
1906 | } | |
1907 | ||
1908 | if (!no_error){ | |
1909 | warn("error in rx desc->status, epid %d, first urb = 0x%lx", | |
1910 | epid, (unsigned long)urb); | |
1911 | __dump_in_desc(myNextRxDesc); | |
1912 | ||
1913 | warn("R_USB_STATUS = 0x%x", *R_USB_STATUS); | |
1914 | ||
1915 | /* Check that ept was disabled when error occurred. */ | |
1916 | switch (usb_pipetype(urb->pipe)) { | |
1917 | case PIPE_BULK: | |
1918 | assert(!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable))); | |
1919 | break; | |
1920 | case PIPE_CONTROL: | |
1921 | assert(!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable))); | |
1922 | break; | |
1923 | case PIPE_INTERRUPT: | |
1924 | assert(!(TxIntrEPList[epid].command & IO_MASK(USB_EP_command, enable))); | |
1925 | break; | |
1926 | case PIPE_ISOCHRONOUS: | |
1927 | assert(!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))); | |
1928 | break; | |
1929 | default: | |
1930 | warn("etrax_usb_rx_interrupt: bad pipetype %d in urb 0x%p", | |
1931 | usb_pipetype(urb->pipe), | |
1932 | urb); | |
1933 | } | |
1934 | etrax_usb_complete_urb(urb, -EPROTO); | |
1935 | goto skip_out; | |
1936 | } | |
1937 | } | |
1938 | ||
1939 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
1940 | assert(urb_priv); | |
1941 | ||
1942 | if ((usb_pipetype(urb->pipe) == PIPE_BULK) || | |
1943 | (usb_pipetype(urb->pipe) == PIPE_CONTROL) || | |
1944 | (usb_pipetype(urb->pipe) == PIPE_INTERRUPT)) { | |
1945 | ||
1946 | if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) { | |
1947 | /* We get nodata for empty data transactions, and the rx descriptor's | |
1948 | hw_len field is not valid in that case. No data to copy in other | |
1949 | words. */ | |
1950 | } else { | |
1951 | /* Make sure the data fits in the buffer. */ | |
1952 | assert(urb_priv->rx_offset + myNextRxDesc->hw_len | |
1953 | <= urb->transfer_buffer_length); | |
1954 | ||
1955 | memcpy(urb->transfer_buffer + urb_priv->rx_offset, | |
1956 | phys_to_virt(myNextRxDesc->buf), myNextRxDesc->hw_len); | |
1957 | urb_priv->rx_offset += myNextRxDesc->hw_len; | |
1958 | } | |
1959 | ||
1960 | if (myNextRxDesc->status & IO_MASK(USB_IN_status, eot)) { | |
1961 | if ((usb_pipetype(urb->pipe) == PIPE_CONTROL) && | |
1962 | ((TxCtrlEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable)) == | |
1963 | IO_STATE(USB_EP_command, enable, yes))) { | |
1964 | /* The EP is still enabled, so the OUT packet used to ack | |
1965 | the in data is probably not processed yet. If the EP | |
1966 | sub pointer has not moved beyond urb_priv->last_sb mark | |
1967 | it for a descriptor interrupt and complete the urb in | |
1968 | the descriptor interrupt handler. | |
1969 | */ | |
1970 | USB_SB_Desc_t *sub = TxCtrlEPList[urb_priv->epid].sub ? phys_to_virt(TxCtrlEPList[urb_priv->epid].sub) : 0; | |
1971 | ||
1972 | while ((sub != NULL) && (sub != urb_priv->last_sb)) { | |
1973 | sub = sub->next ? phys_to_virt(sub->next) : 0; | |
1974 | } | |
1975 | if (sub != NULL) { | |
1976 | /* The urb has not been fully processed. */ | |
1977 | urb_priv->urb_state = WAITING_FOR_DESCR_INTR; | |
1978 | } else { | |
1979 | warn("(CTRL) epid enabled and urb (0x%p) processed, ep->sub=0x%p", urb, (char*)TxCtrlEPList[urb_priv->epid].sub); | |
1980 | etrax_usb_complete_urb(urb, 0); | |
1981 | } | |
1982 | } else { | |
1983 | etrax_usb_complete_urb(urb, 0); | |
1984 | } | |
1985 | } | |
1986 | ||
1987 | } else if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
1988 | ||
1989 | struct usb_iso_packet_descriptor *packet; | |
1990 | ||
1991 | if (urb_priv->urb_state == UNLINK) { | |
1992 | info("Ignoring rx data for urb being unlinked."); | |
1993 | goto skip_out; | |
1994 | } else if (urb_priv->urb_state == NOT_STARTED) { | |
1995 | info("What? Got rx data for urb that isn't started?"); | |
1996 | goto skip_out; | |
1997 | } | |
1998 | ||
1999 | packet = &urb->iso_frame_desc[urb_priv->isoc_packet_counter]; | |
2000 | packet->status = 0; | |
2001 | ||
2002 | if (myNextRxDesc->status & IO_MASK(USB_IN_status, nodata)) { | |
2003 | /* We get nodata for empty data transactions, and the rx descriptor's | |
2004 | hw_len field is not valid in that case. We copy 0 bytes however to | |
2005 | stay in synch. */ | |
2006 | packet->actual_length = 0; | |
2007 | } else { | |
2008 | packet->actual_length = myNextRxDesc->hw_len; | |
2009 | /* Make sure the data fits in the buffer. */ | |
2010 | assert(packet->actual_length <= packet->length); | |
2011 | memcpy(urb->transfer_buffer + packet->offset, | |
2012 | phys_to_virt(myNextRxDesc->buf), packet->actual_length); | |
2013 | } | |
2014 | ||
2015 | /* Increment the packet counter. */ | |
2016 | urb_priv->isoc_packet_counter++; | |
2017 | ||
2018 | /* Note that we don't care about the eot field in the rx descriptor's status. | |
2019 | It will always be set for isoc traffic. */ | |
2020 | if (urb->number_of_packets == urb_priv->isoc_packet_counter) { | |
2021 | ||
2022 | /* Out-of-synch diagnostics. */ | |
2023 | curr_fm = (*R_USB_FM_NUMBER & 0x7ff); | |
2024 | if (((prev_fm + urb_priv->isoc_packet_counter) % (0x7ff + 1)) != curr_fm) { | |
2025 | /* This test is wrong, if there is more than one isoc | |
2026 | in endpoint active it will always calculate wrong | |
2027 | since prev_fm is shared by all endpoints. | |
2028 | ||
2029 | FIXME Make this check per URB using urb->start_frame. | |
2030 | */ | |
2031 | dbg_isoc("Out of synch? Previous frame = %d, current frame = %d", | |
2032 | prev_fm, curr_fm); | |
2033 | ||
2034 | } | |
2035 | prev_fm = curr_fm; | |
2036 | ||
2037 | /* Complete the urb with status OK. */ | |
2038 | etrax_usb_complete_isoc_urb(urb, 0); | |
2039 | } | |
2040 | } | |
2041 | ||
2042 | skip_out: | |
2043 | ||
2044 | /* DMA IN cache bug. Flush the DMA IN buffer from the cache. (struct etrax_dma_descr | |
2045 | has the same layout as USB_IN_Desc for the relevant fields.) */ | |
2046 | prepare_rx_descriptor((struct etrax_dma_descr*)myNextRxDesc); | |
2047 | ||
2048 | myPrevRxDesc = myNextRxDesc; | |
2049 | myPrevRxDesc->command |= IO_MASK(USB_IN_command, eol); | |
2050 | myLastRxDesc->command &= ~IO_MASK(USB_IN_command, eol); | |
2051 | myLastRxDesc = myPrevRxDesc; | |
2052 | ||
2053 | myNextRxDesc->status = 0; | |
2054 | myNextRxDesc = phys_to_virt(myNextRxDesc->next); | |
2055 | } | |
2056 | ||
2057 | restore_flags(flags); | |
2058 | ||
2059 | DBFEXIT; | |
2060 | ||
2061 | return IRQ_HANDLED; | |
2062 | } | |
2063 | ||
2064 | ||
2065 | /* This function will unlink the SB descriptors associated with this urb. */ | |
2066 | static int etrax_remove_from_sb_list(struct urb *urb) | |
2067 | { | |
2068 | USB_SB_Desc_t *next_sb, *first_sb, *last_sb; | |
2069 | etrax_urb_priv_t *urb_priv; | |
2070 | int i = 0; | |
2071 | ||
2072 | DBFENTER; | |
2073 | ||
2074 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
2075 | assert(urb_priv); | |
2076 | ||
2077 | /* Just a sanity check. Since we don't fiddle with the DMA list the EP descriptor | |
2078 | doesn't really need to be disabled, it's just that we expect it to be. */ | |
2079 | if (usb_pipetype(urb->pipe) == PIPE_BULK) { | |
2080 | assert(!(TxBulkEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable))); | |
2081 | } else if (usb_pipetype(urb->pipe) == PIPE_CONTROL) { | |
2082 | assert(!(TxCtrlEPList[urb_priv->epid].command & IO_MASK(USB_EP_command, enable))); | |
2083 | } | |
2084 | ||
2085 | first_sb = urb_priv->first_sb; | |
2086 | last_sb = urb_priv->last_sb; | |
2087 | ||
2088 | assert(first_sb); | |
2089 | assert(last_sb); | |
2090 | ||
2091 | while (first_sb != last_sb) { | |
2092 | next_sb = (USB_SB_Desc_t *)phys_to_virt(first_sb->next); | |
2093 | kmem_cache_free(usb_desc_cache, first_sb); | |
2094 | first_sb = next_sb; | |
2095 | i++; | |
2096 | } | |
2097 | kmem_cache_free(usb_desc_cache, last_sb); | |
2098 | i++; | |
2099 | dbg_sb("%d SB descriptors freed", i); | |
2100 | /* Compare i with urb->number_of_packets for Isoc traffic. | |
2101 | Should be same when calling unlink_urb */ | |
2102 | ||
2103 | DBFEXIT; | |
2104 | ||
2105 | return i; | |
2106 | } | |
2107 | ||
2108 | static int etrax_usb_submit_bulk_urb(struct urb *urb) | |
2109 | { | |
2110 | int epid; | |
2111 | int empty; | |
2112 | unsigned long flags; | |
2113 | etrax_urb_priv_t *urb_priv; | |
2114 | ||
2115 | DBFENTER; | |
2116 | ||
2117 | /* Epid allocation, empty check and list add must be protected. | |
2118 | Read about this in etrax_usb_submit_ctrl_urb. */ | |
2119 | ||
2120 | spin_lock_irqsave(&urb_list_lock, flags); | |
2121 | epid = etrax_usb_setup_epid(urb); | |
2122 | if (epid == -1) { | |
2123 | DBFEXIT; | |
2124 | spin_unlock_irqrestore(&urb_list_lock, flags); | |
2125 | return -ENOMEM; | |
2126 | } | |
2127 | empty = urb_list_empty(epid); | |
2128 | urb_list_add(urb, epid); | |
2129 | spin_unlock_irqrestore(&urb_list_lock, flags); | |
2130 | ||
2131 | dbg_bulk("Adding bulk %s urb 0x%lx to %s list, epid %d", | |
2132 | usb_pipein(urb->pipe) ? "IN" : "OUT", (unsigned long)urb, empty ? "empty" : "", epid); | |
2133 | ||
2134 | /* Mark the urb as being in progress. */ | |
2135 | urb->status = -EINPROGRESS; | |
2136 | ||
2137 | /* Setup the hcpriv data. */ | |
80b6ca48 | 2138 | urb_priv = kzalloc(sizeof(etrax_urb_priv_t), KMALLOC_FLAG); |
1da177e4 LT |
2139 | assert(urb_priv != NULL); |
2140 | /* This sets rx_offset to 0. */ | |
1da177e4 LT |
2141 | urb_priv->urb_state = NOT_STARTED; |
2142 | urb->hcpriv = urb_priv; | |
2143 | ||
2144 | if (empty) { | |
2145 | etrax_usb_add_to_bulk_sb_list(urb, epid); | |
2146 | } | |
2147 | ||
2148 | DBFEXIT; | |
2149 | ||
2150 | return 0; | |
2151 | } | |
2152 | ||
2153 | static void etrax_usb_add_to_bulk_sb_list(struct urb *urb, int epid) | |
2154 | { | |
2155 | USB_SB_Desc_t *sb_desc; | |
2156 | etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
2157 | unsigned long flags; | |
2158 | char maxlen; | |
2159 | ||
2160 | DBFENTER; | |
2161 | ||
2162 | dbg_bulk("etrax_usb_add_to_bulk_sb_list, urb 0x%lx", (unsigned long)urb); | |
2163 | ||
2164 | maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)); | |
2165 | ||
2166 | sb_desc = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2167 | assert(sb_desc != NULL); | |
2168 | memset(sb_desc, 0, sizeof(USB_SB_Desc_t)); | |
2169 | ||
2170 | ||
2171 | if (usb_pipeout(urb->pipe)) { | |
2172 | ||
2173 | dbg_bulk("Grabbing bulk OUT, urb 0x%lx, epid %d", (unsigned long)urb, epid); | |
2174 | ||
2175 | /* This is probably a sanity check of the bulk transaction length | |
2176 | not being larger than 64 kB. */ | |
2177 | if (urb->transfer_buffer_length > 0xffff) { | |
2178 | panic("urb->transfer_buffer_length > 0xffff"); | |
2179 | } | |
2180 | ||
2181 | sb_desc->sw_len = urb->transfer_buffer_length; | |
2182 | ||
2183 | /* The rem field is don't care if it's not a full-length transfer, so setting | |
2184 | it shouldn't hurt. Also, rem isn't used for OUT traffic. */ | |
2185 | sb_desc->command = (IO_FIELD(USB_SB_command, rem, 0) | | |
2186 | IO_STATE(USB_SB_command, tt, out) | | |
2187 | IO_STATE(USB_SB_command, eot, yes) | | |
2188 | IO_STATE(USB_SB_command, eol, yes)); | |
2189 | ||
2190 | /* The full field is set to yes, even if we don't actually check that this is | |
2191 | a full-length transfer (i.e., that transfer_buffer_length % maxlen = 0). | |
2192 | Setting full prevents the USB controller from sending an empty packet in | |
2193 | that case. However, if URB_ZERO_PACKET was set we want that. */ | |
2194 | if (!(urb->transfer_flags & URB_ZERO_PACKET)) { | |
2195 | sb_desc->command |= IO_STATE(USB_SB_command, full, yes); | |
2196 | } | |
2197 | ||
2198 | sb_desc->buf = virt_to_phys(urb->transfer_buffer); | |
2199 | sb_desc->next = 0; | |
2200 | ||
2201 | } else if (usb_pipein(urb->pipe)) { | |
2202 | ||
2203 | dbg_bulk("Grabbing bulk IN, urb 0x%lx, epid %d", (unsigned long)urb, epid); | |
2204 | ||
2205 | sb_desc->sw_len = urb->transfer_buffer_length ? | |
2206 | (urb->transfer_buffer_length - 1) / maxlen + 1 : 0; | |
2207 | ||
2208 | /* The rem field is don't care if it's not a full-length transfer, so setting | |
2209 | it shouldn't hurt. */ | |
2210 | sb_desc->command = | |
2211 | (IO_FIELD(USB_SB_command, rem, | |
2212 | urb->transfer_buffer_length % maxlen) | | |
2213 | IO_STATE(USB_SB_command, tt, in) | | |
2214 | IO_STATE(USB_SB_command, eot, yes) | | |
2215 | IO_STATE(USB_SB_command, eol, yes)); | |
2216 | ||
2217 | sb_desc->buf = 0; | |
2218 | sb_desc->next = 0; | |
2219 | } | |
2220 | ||
2221 | urb_priv->first_sb = sb_desc; | |
2222 | urb_priv->last_sb = sb_desc; | |
2223 | urb_priv->epid = epid; | |
2224 | ||
2225 | urb->hcpriv = urb_priv; | |
2226 | ||
2227 | /* Reset toggle bits and reset error count. */ | |
2228 | save_flags(flags); | |
2229 | cli(); | |
2230 | ||
2231 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
2232 | nop(); | |
2233 | ||
2234 | /* FIXME: Is this a special case since the hold field is checked, | |
2235 | or should we check hold in a lot of other cases as well? */ | |
2236 | if (*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)) { | |
2237 | panic("Hold was set in %s", __FUNCTION__); | |
2238 | } | |
2239 | ||
2240 | /* Reset error counters (regardless of which direction this traffic is). */ | |
2241 | *R_USB_EPT_DATA &= | |
2242 | ~(IO_MASK(R_USB_EPT_DATA, error_count_in) | | |
2243 | IO_MASK(R_USB_EPT_DATA, error_count_out)); | |
2244 | ||
2245 | /* Software must preset the toggle bits. */ | |
2246 | if (usb_pipeout(urb->pipe)) { | |
2247 | char toggle = | |
2248 | usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe)); | |
2249 | *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_out); | |
2250 | *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_out, toggle); | |
2251 | } else { | |
2252 | char toggle = | |
2253 | usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), usb_pipeout(urb->pipe)); | |
2254 | *R_USB_EPT_DATA &= ~IO_MASK(R_USB_EPT_DATA, t_in); | |
2255 | *R_USB_EPT_DATA |= IO_FIELD(R_USB_EPT_DATA, t_in, toggle); | |
2256 | } | |
2257 | ||
2258 | /* Assert that the EP descriptor is disabled. */ | |
2259 | assert(!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable))); | |
2260 | ||
2261 | /* The reason we set the EP's sub pointer directly instead of | |
2262 | walking the SB list and linking it last in the list is that we only | |
2263 | have one active urb at a time (the rest are queued). */ | |
2264 | ||
2265 | /* Note that we cannot have interrupts running when we have set the SB descriptor | |
2266 | but the EP is not yet enabled. If a bulk eot happens for another EP, we will | |
2267 | find this EP disabled and with a SB != 0, which will make us think that it's done. */ | |
2268 | TxBulkEPList[epid].sub = virt_to_phys(sb_desc); | |
2269 | TxBulkEPList[epid].hw_len = 0; | |
2270 | /* Note that we don't have to fill in the ep_id field since this | |
2271 | was done when we allocated the EP descriptors in init_tx_bulk_ep. */ | |
2272 | ||
2273 | /* Check if the dummy list is already with us (if several urbs were queued). */ | |
2274 | if (TxBulkEPList[epid].next != virt_to_phys(&TxBulkDummyEPList[epid][0])) { | |
2275 | ||
2276 | dbg_bulk("Inviting dummy list to the party for urb 0x%lx, epid %d", | |
2277 | (unsigned long)urb, epid); | |
2278 | ||
2279 | /* The last EP in the dummy list already has its next pointer set to | |
2280 | TxBulkEPList[epid].next. */ | |
2281 | ||
2282 | /* We don't need to check if the DMA is at this EP or not before changing the | |
2283 | next pointer, since we will do it in one 32-bit write (EP descriptors are | |
2284 | 32-bit aligned). */ | |
2285 | TxBulkEPList[epid].next = virt_to_phys(&TxBulkDummyEPList[epid][0]); | |
2286 | } | |
2287 | /* Enable the EP descr. */ | |
2288 | dbg_bulk("Enabling bulk EP for urb 0x%lx, epid %d", (unsigned long)urb, epid); | |
2289 | TxBulkEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes); | |
2290 | ||
2291 | /* Everything is set up, safe to enable interrupts again. */ | |
2292 | restore_flags(flags); | |
2293 | ||
2294 | /* If the DMA bulk channel isn't running, we need to restart it if it | |
2295 | has stopped at the last EP descriptor (DMA stopped because there was | |
2296 | no more traffic) or if it has stopped at a dummy EP with the intr flag | |
2297 | set (DMA stopped because we were too slow in inserting new traffic). */ | |
2298 | if (!(*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd))) { | |
2299 | ||
2300 | USB_EP_Desc_t *ep; | |
2301 | ep = (USB_EP_Desc_t *)phys_to_virt(*R_DMA_CH8_SUB0_EP); | |
2302 | dbg_bulk("DMA channel not running in add"); | |
2303 | dbg_bulk("DMA is at 0x%lx", (unsigned long)ep); | |
2304 | ||
2305 | if (*R_DMA_CH8_SUB0_EP == virt_to_phys(&TxBulkEPList[NBR_OF_EPIDS - 1]) || | |
2306 | (ep->command & 0x8) >> 3) { | |
2307 | *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); | |
2308 | /* Update/restart the bulk start timer since we just started the channel. */ | |
2309 | mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL); | |
2310 | /* Update/restart the bulk eot timer since we just inserted traffic. */ | |
2311 | mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL); | |
2312 | } | |
2313 | } | |
2314 | ||
2315 | DBFEXIT; | |
2316 | } | |
2317 | ||
2318 | static void etrax_usb_complete_bulk_urb(struct urb *urb, int status) | |
2319 | { | |
2320 | etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
2321 | int epid = urb_priv->epid; | |
2322 | unsigned long flags; | |
2323 | ||
2324 | DBFENTER; | |
2325 | ||
2326 | if (status) | |
2327 | warn("Completing bulk urb with status %d.", status); | |
2328 | ||
2329 | dbg_bulk("Completing bulk urb 0x%lx for epid %d", (unsigned long)urb, epid); | |
2330 | ||
2331 | /* Update the urb list. */ | |
2332 | urb_list_del(urb, epid); | |
2333 | ||
2334 | /* For an IN pipe, we always set the actual length, regardless of whether there was | |
2335 | an error or not (which means the device driver can use the data if it wants to). */ | |
2336 | if (usb_pipein(urb->pipe)) { | |
2337 | urb->actual_length = urb_priv->rx_offset; | |
2338 | } else { | |
2339 | /* Set actual_length for OUT urbs also; the USB mass storage driver seems | |
2340 | to want that. We wouldn't know of any partial writes if there was an error. */ | |
2341 | if (status == 0) { | |
2342 | urb->actual_length = urb->transfer_buffer_length; | |
2343 | } else { | |
2344 | urb->actual_length = 0; | |
2345 | } | |
2346 | } | |
2347 | ||
2348 | /* FIXME: Is there something of the things below we shouldn't do if there was an error? | |
2349 | Like, maybe we shouldn't toggle the toggle bits, or maybe we shouldn't insert more traffic. */ | |
2350 | ||
2351 | save_flags(flags); | |
2352 | cli(); | |
2353 | ||
2354 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
2355 | nop(); | |
2356 | ||
2357 | /* We need to fiddle with the toggle bits because the hardware doesn't do it for us. */ | |
2358 | if (usb_pipeout(urb->pipe)) { | |
2359 | char toggle = | |
2360 | IO_EXTRACT(R_USB_EPT_DATA, t_out, *R_USB_EPT_DATA); | |
2361 | usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), | |
2362 | usb_pipeout(urb->pipe), toggle); | |
2363 | } else { | |
2364 | char toggle = | |
2365 | IO_EXTRACT(R_USB_EPT_DATA, t_in, *R_USB_EPT_DATA); | |
2366 | usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), | |
2367 | usb_pipeout(urb->pipe), toggle); | |
2368 | } | |
2369 | restore_flags(flags); | |
2370 | ||
2371 | /* Remember to free the SBs. */ | |
2372 | etrax_remove_from_sb_list(urb); | |
2373 | kfree(urb_priv); | |
2374 | urb->hcpriv = 0; | |
2375 | ||
2376 | /* If there are any more urb's in the list we'd better start sending */ | |
2377 | if (!urb_list_empty(epid)) { | |
2378 | ||
2379 | struct urb *new_urb; | |
2380 | ||
2381 | /* Get the first urb. */ | |
2382 | new_urb = urb_list_first(epid); | |
2383 | assert(new_urb); | |
2384 | ||
2385 | dbg_bulk("More bulk for epid %d", epid); | |
2386 | ||
2387 | etrax_usb_add_to_bulk_sb_list(new_urb, epid); | |
2388 | } | |
2389 | ||
2390 | urb->status = status; | |
2391 | ||
2392 | /* We let any non-zero status from the layer above have precedence. */ | |
2393 | if (status == 0) { | |
2394 | /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's max length) | |
2395 | is to be treated as an error. */ | |
2396 | if (urb->transfer_flags & URB_SHORT_NOT_OK) { | |
2397 | if (usb_pipein(urb->pipe) && | |
2398 | (urb->actual_length != | |
2399 | usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)))) { | |
2400 | urb->status = -EREMOTEIO; | |
2401 | } | |
2402 | } | |
2403 | } | |
2404 | ||
2405 | if (urb->complete) { | |
2406 | urb->complete(urb, NULL); | |
2407 | } | |
2408 | ||
2409 | if (urb_list_empty(epid)) { | |
2410 | /* This means that this EP is now free, deconfigure it. */ | |
2411 | etrax_usb_free_epid(epid); | |
2412 | ||
2413 | /* No more traffic; time to clean up. | |
2414 | Must set sub pointer to 0, since we look at the sub pointer when handling | |
2415 | the bulk eot interrupt. */ | |
2416 | ||
2417 | dbg_bulk("No bulk for epid %d", epid); | |
2418 | ||
2419 | TxBulkEPList[epid].sub = 0; | |
2420 | ||
2421 | /* Unlink the dummy list. */ | |
2422 | ||
2423 | dbg_bulk("Kicking dummy list out of party for urb 0x%lx, epid %d", | |
2424 | (unsigned long)urb, epid); | |
2425 | ||
2426 | /* No need to wait for the DMA before changing the next pointer. | |
2427 | The modulo NBR_OF_EPIDS isn't actually necessary, since we will never use | |
2428 | the last one (INVALID_EPID) for actual traffic. */ | |
2429 | TxBulkEPList[epid].next = | |
2430 | virt_to_phys(&TxBulkEPList[(epid + 1) % NBR_OF_EPIDS]); | |
2431 | } | |
2432 | ||
2433 | DBFEXIT; | |
2434 | } | |
2435 | ||
2436 | static int etrax_usb_submit_ctrl_urb(struct urb *urb) | |
2437 | { | |
2438 | int epid; | |
2439 | int empty; | |
2440 | unsigned long flags; | |
2441 | etrax_urb_priv_t *urb_priv; | |
2442 | ||
2443 | DBFENTER; | |
2444 | ||
2445 | /* FIXME: Return -ENXIO if there is already a queued urb for this endpoint? */ | |
2446 | ||
2447 | /* Epid allocation, empty check and list add must be protected. | |
2448 | ||
2449 | Epid allocation because if we find an existing epid for this endpoint an urb might be | |
2450 | completed (emptying the list) before we add the new urb to the list, causing the epid | |
2451 | to be de-allocated. We would then start the transfer with an invalid epid -> epid attn. | |
2452 | ||
2453 | Empty check and add because otherwise we might conclude that the list is not empty, | |
2454 | after which it becomes empty before we add the new urb to the list, causing us not to | |
2455 | insert the new traffic into the SB list. */ | |
2456 | ||
2457 | spin_lock_irqsave(&urb_list_lock, flags); | |
2458 | epid = etrax_usb_setup_epid(urb); | |
2459 | if (epid == -1) { | |
2460 | spin_unlock_irqrestore(&urb_list_lock, flags); | |
2461 | DBFEXIT; | |
2462 | return -ENOMEM; | |
2463 | } | |
2464 | empty = urb_list_empty(epid); | |
2465 | urb_list_add(urb, epid); | |
2466 | spin_unlock_irqrestore(&urb_list_lock, flags); | |
2467 | ||
2468 | dbg_ctrl("Adding ctrl urb 0x%lx to %s list, epid %d", | |
2469 | (unsigned long)urb, empty ? "empty" : "", epid); | |
2470 | ||
2471 | /* Mark the urb as being in progress. */ | |
2472 | urb->status = -EINPROGRESS; | |
2473 | ||
2474 | /* Setup the hcpriv data. */ | |
80b6ca48 | 2475 | urb_priv = kzalloc(sizeof(etrax_urb_priv_t), KMALLOC_FLAG); |
1da177e4 LT |
2476 | assert(urb_priv != NULL); |
2477 | /* This sets rx_offset to 0. */ | |
1da177e4 LT |
2478 | urb_priv->urb_state = NOT_STARTED; |
2479 | urb->hcpriv = urb_priv; | |
2480 | ||
2481 | if (empty) { | |
2482 | etrax_usb_add_to_ctrl_sb_list(urb, epid); | |
2483 | } | |
2484 | ||
2485 | DBFEXIT; | |
2486 | ||
2487 | return 0; | |
2488 | } | |
2489 | ||
2490 | static void etrax_usb_add_to_ctrl_sb_list(struct urb *urb, int epid) | |
2491 | { | |
2492 | USB_SB_Desc_t *sb_desc_setup; | |
2493 | USB_SB_Desc_t *sb_desc_data; | |
2494 | USB_SB_Desc_t *sb_desc_status; | |
2495 | ||
2496 | etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
2497 | ||
2498 | unsigned long flags; | |
2499 | char maxlen; | |
2500 | ||
2501 | DBFENTER; | |
2502 | ||
2503 | maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)); | |
2504 | ||
2505 | sb_desc_setup = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2506 | assert(sb_desc_setup != NULL); | |
2507 | sb_desc_status = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2508 | assert(sb_desc_status != NULL); | |
2509 | ||
2510 | /* Initialize the mandatory setup SB descriptor (used only in control transfers) */ | |
2511 | sb_desc_setup->sw_len = 8; | |
2512 | sb_desc_setup->command = (IO_FIELD(USB_SB_command, rem, 0) | | |
2513 | IO_STATE(USB_SB_command, tt, setup) | | |
2514 | IO_STATE(USB_SB_command, full, yes) | | |
2515 | IO_STATE(USB_SB_command, eot, yes)); | |
2516 | ||
2517 | sb_desc_setup->buf = virt_to_phys(urb->setup_packet); | |
2518 | ||
2519 | if (usb_pipeout(urb->pipe)) { | |
2520 | dbg_ctrl("Transfer for epid %d is OUT", epid); | |
2521 | ||
2522 | /* If this Control OUT transfer has an optional data stage we add an OUT token | |
2523 | before the mandatory IN (status) token, hence the reordered SB list */ | |
2524 | ||
2525 | sb_desc_setup->next = virt_to_phys(sb_desc_status); | |
2526 | if (urb->transfer_buffer) { | |
2527 | ||
2528 | dbg_ctrl("This OUT transfer has an extra data stage"); | |
2529 | ||
2530 | sb_desc_data = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2531 | assert(sb_desc_data != NULL); | |
2532 | ||
2533 | sb_desc_setup->next = virt_to_phys(sb_desc_data); | |
2534 | ||
2535 | sb_desc_data->sw_len = urb->transfer_buffer_length; | |
2536 | sb_desc_data->command = (IO_STATE(USB_SB_command, tt, out) | | |
2537 | IO_STATE(USB_SB_command, full, yes) | | |
2538 | IO_STATE(USB_SB_command, eot, yes)); | |
2539 | sb_desc_data->buf = virt_to_phys(urb->transfer_buffer); | |
2540 | sb_desc_data->next = virt_to_phys(sb_desc_status); | |
2541 | } | |
2542 | ||
2543 | sb_desc_status->sw_len = 1; | |
2544 | sb_desc_status->command = (IO_FIELD(USB_SB_command, rem, 0) | | |
2545 | IO_STATE(USB_SB_command, tt, in) | | |
2546 | IO_STATE(USB_SB_command, eot, yes) | | |
2547 | IO_STATE(USB_SB_command, intr, yes) | | |
2548 | IO_STATE(USB_SB_command, eol, yes)); | |
2549 | ||
2550 | sb_desc_status->buf = 0; | |
2551 | sb_desc_status->next = 0; | |
2552 | ||
2553 | } else if (usb_pipein(urb->pipe)) { | |
2554 | ||
2555 | dbg_ctrl("Transfer for epid %d is IN", epid); | |
2556 | dbg_ctrl("transfer_buffer_length = %d", urb->transfer_buffer_length); | |
2557 | dbg_ctrl("rem is calculated to %d", urb->transfer_buffer_length % maxlen); | |
2558 | ||
2559 | sb_desc_data = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2560 | assert(sb_desc_data != NULL); | |
2561 | ||
2562 | sb_desc_setup->next = virt_to_phys(sb_desc_data); | |
2563 | ||
2564 | sb_desc_data->sw_len = urb->transfer_buffer_length ? | |
2565 | (urb->transfer_buffer_length - 1) / maxlen + 1 : 0; | |
2566 | dbg_ctrl("sw_len got %d", sb_desc_data->sw_len); | |
2567 | ||
2568 | sb_desc_data->command = | |
2569 | (IO_FIELD(USB_SB_command, rem, | |
2570 | urb->transfer_buffer_length % maxlen) | | |
2571 | IO_STATE(USB_SB_command, tt, in) | | |
2572 | IO_STATE(USB_SB_command, eot, yes)); | |
2573 | ||
2574 | sb_desc_data->buf = 0; | |
2575 | sb_desc_data->next = virt_to_phys(sb_desc_status); | |
2576 | ||
2577 | /* Read comment at zout_buffer declaration for an explanation to this. */ | |
2578 | sb_desc_status->sw_len = 1; | |
2579 | sb_desc_status->command = (IO_FIELD(USB_SB_command, rem, 0) | | |
2580 | IO_STATE(USB_SB_command, tt, zout) | | |
2581 | IO_STATE(USB_SB_command, full, yes) | | |
2582 | IO_STATE(USB_SB_command, eot, yes) | | |
2583 | IO_STATE(USB_SB_command, intr, yes) | | |
2584 | IO_STATE(USB_SB_command, eol, yes)); | |
2585 | ||
2586 | sb_desc_status->buf = virt_to_phys(&zout_buffer[0]); | |
2587 | sb_desc_status->next = 0; | |
2588 | } | |
2589 | ||
2590 | urb_priv->first_sb = sb_desc_setup; | |
2591 | urb_priv->last_sb = sb_desc_status; | |
2592 | urb_priv->epid = epid; | |
2593 | ||
2594 | urb_priv->urb_state = STARTED; | |
2595 | ||
2596 | /* Reset toggle bits and reset error count, remember to di and ei */ | |
2597 | /* Warning: it is possible that this locking doesn't work with bottom-halves */ | |
2598 | ||
2599 | save_flags(flags); | |
2600 | cli(); | |
2601 | ||
2602 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
2603 | nop(); | |
2604 | if (*R_USB_EPT_DATA & IO_MASK(R_USB_EPT_DATA, hold)) { | |
2605 | panic("Hold was set in %s", __FUNCTION__); | |
2606 | } | |
2607 | ||
2608 | ||
2609 | /* FIXME: Compare with etrax_usb_add_to_bulk_sb_list where the toggle bits | |
2610 | are set to a specific value. Why the difference? Read "Transfer and Toggle Bits | |
2611 | in Designer's Reference, p. 8 - 11. */ | |
2612 | *R_USB_EPT_DATA &= | |
2613 | ~(IO_MASK(R_USB_EPT_DATA, error_count_in) | | |
2614 | IO_MASK(R_USB_EPT_DATA, error_count_out) | | |
2615 | IO_MASK(R_USB_EPT_DATA, t_in) | | |
2616 | IO_MASK(R_USB_EPT_DATA, t_out)); | |
2617 | ||
2618 | /* Since we use the rx interrupt to complete ctrl urbs, we can enable interrupts now | |
2619 | (i.e. we don't check the sub pointer on an eot interrupt like we do for bulk traffic). */ | |
2620 | restore_flags(flags); | |
2621 | ||
2622 | /* Assert that the EP descriptor is disabled. */ | |
2623 | assert(!(TxCtrlEPList[epid].command & IO_MASK(USB_EP_command, enable))); | |
2624 | ||
2625 | /* Set up and enable the EP descriptor. */ | |
2626 | TxCtrlEPList[epid].sub = virt_to_phys(sb_desc_setup); | |
2627 | TxCtrlEPList[epid].hw_len = 0; | |
2628 | TxCtrlEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes); | |
2629 | ||
2630 | /* We start the DMA sub channel without checking if it's running or not, because: | |
2631 | 1) If it's already running, issuing the start command is a nop. | |
2632 | 2) We avoid a test-and-set race condition. */ | |
2633 | *R_DMA_CH8_SUB1_CMD = IO_STATE(R_DMA_CH8_SUB1_CMD, cmd, start); | |
2634 | ||
2635 | DBFEXIT; | |
2636 | } | |
2637 | ||
2638 | static void etrax_usb_complete_ctrl_urb(struct urb *urb, int status) | |
2639 | { | |
2640 | etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
2641 | int epid = urb_priv->epid; | |
2642 | ||
2643 | DBFENTER; | |
2644 | ||
2645 | if (status) | |
2646 | warn("Completing ctrl urb with status %d.", status); | |
2647 | ||
2648 | dbg_ctrl("Completing ctrl epid %d, urb 0x%lx", epid, (unsigned long)urb); | |
2649 | ||
2650 | /* Remove this urb from the list. */ | |
2651 | urb_list_del(urb, epid); | |
2652 | ||
2653 | /* For an IN pipe, we always set the actual length, regardless of whether there was | |
2654 | an error or not (which means the device driver can use the data if it wants to). */ | |
2655 | if (usb_pipein(urb->pipe)) { | |
2656 | urb->actual_length = urb_priv->rx_offset; | |
2657 | } | |
2658 | ||
2659 | /* FIXME: Is there something of the things below we shouldn't do if there was an error? | |
2660 | Like, maybe we shouldn't insert more traffic. */ | |
2661 | ||
2662 | /* Remember to free the SBs. */ | |
2663 | etrax_remove_from_sb_list(urb); | |
2664 | kfree(urb_priv); | |
2665 | urb->hcpriv = 0; | |
2666 | ||
2667 | /* If there are any more urbs in the list we'd better start sending. */ | |
2668 | if (!urb_list_empty(epid)) { | |
2669 | struct urb *new_urb; | |
2670 | ||
2671 | /* Get the first urb. */ | |
2672 | new_urb = urb_list_first(epid); | |
2673 | assert(new_urb); | |
2674 | ||
2675 | dbg_ctrl("More ctrl for epid %d, first urb = 0x%lx", epid, (unsigned long)new_urb); | |
2676 | ||
2677 | etrax_usb_add_to_ctrl_sb_list(new_urb, epid); | |
2678 | } | |
2679 | ||
2680 | urb->status = status; | |
2681 | ||
2682 | /* We let any non-zero status from the layer above have precedence. */ | |
2683 | if (status == 0) { | |
2684 | /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's max length) | |
2685 | is to be treated as an error. */ | |
2686 | if (urb->transfer_flags & URB_SHORT_NOT_OK) { | |
2687 | if (usb_pipein(urb->pipe) && | |
2688 | (urb->actual_length != | |
2689 | usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)))) { | |
2690 | urb->status = -EREMOTEIO; | |
2691 | } | |
2692 | } | |
2693 | } | |
2694 | ||
2695 | if (urb->complete) { | |
2696 | urb->complete(urb, NULL); | |
2697 | } | |
2698 | ||
2699 | if (urb_list_empty(epid)) { | |
2700 | /* No more traffic. Time to clean up. */ | |
2701 | etrax_usb_free_epid(epid); | |
2702 | /* Must set sub pointer to 0. */ | |
2703 | dbg_ctrl("No ctrl for epid %d", epid); | |
2704 | TxCtrlEPList[epid].sub = 0; | |
2705 | } | |
2706 | ||
2707 | DBFEXIT; | |
2708 | } | |
2709 | ||
2710 | static int etrax_usb_submit_intr_urb(struct urb *urb) | |
2711 | { | |
2712 | ||
2713 | int epid; | |
2714 | ||
2715 | DBFENTER; | |
2716 | ||
2717 | if (usb_pipeout(urb->pipe)) { | |
2718 | /* Unsupported transfer type. | |
2719 | We don't support interrupt out traffic. (If we do, we can't support | |
2720 | intervals for neither in or out traffic, but are forced to schedule all | |
2721 | interrupt traffic in one frame.) */ | |
2722 | return -EINVAL; | |
2723 | } | |
2724 | ||
2725 | epid = etrax_usb_setup_epid(urb); | |
2726 | if (epid == -1) { | |
2727 | DBFEXIT; | |
2728 | return -ENOMEM; | |
2729 | } | |
2730 | ||
2731 | if (!urb_list_empty(epid)) { | |
2732 | /* There is already a queued urb for this endpoint. */ | |
2733 | etrax_usb_free_epid(epid); | |
2734 | return -ENXIO; | |
2735 | } | |
2736 | ||
2737 | urb->status = -EINPROGRESS; | |
2738 | ||
2739 | dbg_intr("Add intr urb 0x%lx, to list, epid %d", (unsigned long)urb, epid); | |
2740 | ||
2741 | urb_list_add(urb, epid); | |
2742 | etrax_usb_add_to_intr_sb_list(urb, epid); | |
2743 | ||
2744 | return 0; | |
2745 | ||
2746 | DBFEXIT; | |
2747 | } | |
2748 | ||
2749 | static void etrax_usb_add_to_intr_sb_list(struct urb *urb, int epid) | |
2750 | { | |
2751 | ||
2752 | volatile USB_EP_Desc_t *tmp_ep; | |
2753 | volatile USB_EP_Desc_t *first_ep; | |
2754 | ||
2755 | char maxlen; | |
2756 | int interval; | |
2757 | int i; | |
2758 | ||
2759 | etrax_urb_priv_t *urb_priv; | |
2760 | ||
2761 | DBFENTER; | |
2762 | ||
2763 | maxlen = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe)); | |
2764 | interval = urb->interval; | |
2765 | ||
80b6ca48 | 2766 | urb_priv = kzalloc(sizeof(etrax_urb_priv_t), KMALLOC_FLAG); |
1da177e4 | 2767 | assert(urb_priv != NULL); |
1da177e4 LT |
2768 | urb->hcpriv = urb_priv; |
2769 | ||
2770 | first_ep = &TxIntrEPList[0]; | |
2771 | ||
2772 | /* Round of the interval to 2^n, it is obvious that this code favours | |
2773 | smaller numbers, but that is actually a good thing */ | |
2774 | /* FIXME: The "rounding error" for larger intervals will be quite | |
2775 | large. For in traffic this shouldn't be a problem since it will only | |
2776 | mean that we "poll" more often. */ | |
2777 | for (i = 0; interval; i++) { | |
2778 | interval = interval >> 1; | |
2779 | } | |
2780 | interval = 1 << (i - 1); | |
2781 | ||
2782 | dbg_intr("Interval rounded to %d", interval); | |
2783 | ||
2784 | tmp_ep = first_ep; | |
2785 | i = 0; | |
2786 | do { | |
2787 | if (tmp_ep->command & IO_MASK(USB_EP_command, eof)) { | |
2788 | if ((i % interval) == 0) { | |
2789 | /* Insert the traffic ep after tmp_ep */ | |
2790 | USB_EP_Desc_t *ep_desc; | |
2791 | USB_SB_Desc_t *sb_desc; | |
2792 | ||
2793 | dbg_intr("Inserting EP for epid %d", epid); | |
2794 | ||
2795 | ep_desc = (USB_EP_Desc_t *) | |
2796 | kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2797 | sb_desc = (USB_SB_Desc_t *) | |
2798 | kmem_cache_alloc(usb_desc_cache, SLAB_FLAG); | |
2799 | assert(ep_desc != NULL); | |
2800 | CHECK_ALIGN(ep_desc); | |
2801 | assert(sb_desc != NULL); | |
2802 | ||
2803 | ep_desc->sub = virt_to_phys(sb_desc); | |
2804 | ep_desc->hw_len = 0; | |
2805 | ep_desc->command = (IO_FIELD(USB_EP_command, epid, epid) | | |
2806 | IO_STATE(USB_EP_command, enable, yes)); | |
2807 | ||
2808 | ||
2809 | /* Round upwards the number of packets of size maxlen | |
2810 | that this SB descriptor should receive. */ | |
2811 | sb_desc->sw_len = urb->transfer_buffer_length ? | |
2812 | (urb->transfer_buffer_length - 1) / maxlen + 1 : 0; | |
2813 | sb_desc->next = 0; | |
2814 | sb_desc->buf = 0; | |
2815 | sb_desc->command = | |
2816 | (IO_FIELD(USB_SB_command, rem, urb->transfer_buffer_length % maxlen) | | |
2817 | IO_STATE(USB_SB_command, tt, in) | | |
2818 | IO_STATE(USB_SB_command, eot, yes) | | |
2819 | IO_STATE(USB_SB_command, eol, yes)); | |
2820 | ||
2821 | ep_desc->next = tmp_ep->next; | |
2822 | tmp_ep->next = virt_to_phys(ep_desc); | |
2823 | } | |
2824 | i++; | |
2825 | } | |
2826 | tmp_ep = (USB_EP_Desc_t *)phys_to_virt(tmp_ep->next); | |
2827 | } while (tmp_ep != first_ep); | |
2828 | ||
2829 | ||
2830 | /* Note that first_sb/last_sb doesn't apply to interrupt traffic. */ | |
2831 | urb_priv->epid = epid; | |
2832 | ||
2833 | /* We start the DMA sub channel without checking if it's running or not, because: | |
2834 | 1) If it's already running, issuing the start command is a nop. | |
2835 | 2) We avoid a test-and-set race condition. */ | |
2836 | *R_DMA_CH8_SUB2_CMD = IO_STATE(R_DMA_CH8_SUB2_CMD, cmd, start); | |
2837 | ||
2838 | DBFEXIT; | |
2839 | } | |
2840 | ||
2841 | ||
2842 | ||
2843 | static void etrax_usb_complete_intr_urb(struct urb *urb, int status) | |
2844 | { | |
2845 | etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
2846 | int epid = urb_priv->epid; | |
2847 | ||
2848 | DBFENTER; | |
2849 | ||
2850 | if (status) | |
2851 | warn("Completing intr urb with status %d.", status); | |
2852 | ||
2853 | dbg_intr("Completing intr epid %d, urb 0x%lx", epid, (unsigned long)urb); | |
2854 | ||
2855 | urb->status = status; | |
2856 | urb->actual_length = urb_priv->rx_offset; | |
2857 | ||
2858 | dbg_intr("interrupt urb->actual_length = %d", urb->actual_length); | |
2859 | ||
2860 | /* We let any non-zero status from the layer above have precedence. */ | |
2861 | if (status == 0) { | |
2862 | /* URB_SHORT_NOT_OK means that short reads (shorter than the endpoint's max length) | |
2863 | is to be treated as an error. */ | |
2864 | if (urb->transfer_flags & URB_SHORT_NOT_OK) { | |
2865 | if (urb->actual_length != | |
2866 | usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))) { | |
2867 | urb->status = -EREMOTEIO; | |
2868 | } | |
2869 | } | |
2870 | } | |
2871 | ||
2872 | /* The driver will resubmit the URB so we need to remove it first */ | |
2873 | etrax_usb_unlink_urb(urb, 0); | |
2874 | if (urb->complete) { | |
2875 | urb->complete(urb, NULL); | |
2876 | } | |
2877 | ||
2878 | DBFEXIT; | |
2879 | } | |
2880 | ||
2881 | ||
2882 | static int etrax_usb_submit_isoc_urb(struct urb *urb) | |
2883 | { | |
2884 | int epid; | |
2885 | unsigned long flags; | |
2886 | ||
2887 | DBFENTER; | |
2888 | ||
2889 | dbg_isoc("Submitting isoc urb = 0x%lx", (unsigned long)urb); | |
2890 | ||
2891 | /* Epid allocation, empty check and list add must be protected. | |
2892 | Read about this in etrax_usb_submit_ctrl_urb. */ | |
2893 | ||
2894 | spin_lock_irqsave(&urb_list_lock, flags); | |
2895 | /* Is there an active epid for this urb ? */ | |
2896 | epid = etrax_usb_setup_epid(urb); | |
2897 | if (epid == -1) { | |
2898 | DBFEXIT; | |
2899 | spin_unlock_irqrestore(&urb_list_lock, flags); | |
2900 | return -ENOMEM; | |
2901 | } | |
2902 | ||
2903 | /* Ok, now we got valid endpoint, lets insert some traffic */ | |
2904 | ||
2905 | urb->status = -EINPROGRESS; | |
2906 | ||
2907 | /* Find the last urb in the URB_List and add this urb after that one. | |
2908 | Also add the traffic, that is do an etrax_usb_add_to_isoc_sb_list. This | |
2909 | is important to make this in "real time" since isochronous traffic is | |
2910 | time sensitive. */ | |
2911 | ||
2912 | dbg_isoc("Adding isoc urb to (possibly empty) list"); | |
2913 | urb_list_add(urb, epid); | |
2914 | etrax_usb_add_to_isoc_sb_list(urb, epid); | |
2915 | spin_unlock_irqrestore(&urb_list_lock, flags); | |
2916 | ||
2917 | DBFEXIT; | |
2918 | ||
2919 | return 0; | |
2920 | } | |
2921 | ||
2922 | static void etrax_usb_check_error_isoc_ep(const int epid) | |
2923 | { | |
2924 | unsigned long int flags; | |
2925 | int error_code; | |
2926 | __u32 r_usb_ept_data; | |
2927 | ||
2928 | /* We can't read R_USB_EPID_ATTN here since it would clear the iso_eof, | |
2929 | bulk_eot and epid_attn interrupts. So we just check the status of | |
2930 | the epid without testing if for it in R_USB_EPID_ATTN. */ | |
2931 | ||
2932 | ||
2933 | save_flags(flags); | |
2934 | cli(); | |
2935 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
2936 | nop(); | |
2937 | /* Note that although there are separate R_USB_EPT_DATA and R_USB_EPT_DATA_ISO | |
2938 | registers, they are located at the same address and are of the same size. | |
2939 | In other words, this read should be ok for isoc also. */ | |
2940 | r_usb_ept_data = *R_USB_EPT_DATA; | |
2941 | restore_flags(flags); | |
2942 | ||
2943 | error_code = IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data); | |
2944 | ||
2945 | if (r_usb_ept_data & IO_MASK(R_USB_EPT_DATA, hold)) { | |
2946 | warn("Hold was set for epid %d.", epid); | |
2947 | return; | |
2948 | } | |
2949 | ||
2950 | if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA_ISO, error_code, no_error)) { | |
2951 | ||
2952 | /* This indicates that the SB list of the ept was completed before | |
2953 | new data was appended to it. This is not an error, but indicates | |
2954 | large system or USB load and could possibly cause trouble for | |
2955 | very timing sensitive USB device drivers so we log it. | |
2956 | */ | |
2957 | info("Isoc. epid %d disabled with no error", epid); | |
2958 | return; | |
2959 | ||
2960 | } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA_ISO, error_code, stall)) { | |
2961 | /* Not really a protocol error, just says that the endpoint gave | |
2962 | a stall response. Note that error_code cannot be stall for isoc. */ | |
2963 | panic("Isoc traffic cannot stall"); | |
2964 | ||
2965 | } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA_ISO, error_code, bus_error)) { | |
2966 | /* Two devices responded to a transaction request. Must be resolved | |
2967 | by software. FIXME: Reset ports? */ | |
2968 | panic("Bus error for epid %d." | |
2969 | " Two devices responded to transaction request", | |
2970 | epid); | |
2971 | ||
2972 | } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, buffer_error)) { | |
2973 | /* DMA overrun or underrun. */ | |
2974 | warn("Buffer overrun/underrun for epid %d. DMA too busy?", epid); | |
2975 | ||
2976 | /* It seems that error_code = buffer_error in | |
2977 | R_USB_EPT_DATA/R_USB_EPT_DATA_ISO and ourun = yes in R_USB_STATUS | |
2978 | are the same error. */ | |
2979 | } | |
2980 | } | |
2981 | ||
2982 | ||
2983 | static void etrax_usb_add_to_isoc_sb_list(struct urb *urb, int epid) | |
2984 | { | |
2985 | ||
2986 | int i = 0; | |
2987 | ||
2988 | etrax_urb_priv_t *urb_priv; | |
2989 | USB_SB_Desc_t *prev_sb_desc, *next_sb_desc, *temp_sb_desc; | |
2990 | ||
2991 | DBFENTER; | |
2992 | ||
2993 | prev_sb_desc = next_sb_desc = temp_sb_desc = NULL; | |
2994 | ||
80b6ca48 | 2995 | urb_priv = kzalloc(sizeof(etrax_urb_priv_t), GFP_ATOMIC); |
1da177e4 | 2996 | assert(urb_priv != NULL); |
1da177e4 LT |
2997 | |
2998 | urb->hcpriv = urb_priv; | |
2999 | urb_priv->epid = epid; | |
3000 | ||
3001 | if (usb_pipeout(urb->pipe)) { | |
3002 | ||
3003 | if (urb->number_of_packets == 0) panic("etrax_usb_add_to_isoc_sb_list 0 packets\n"); | |
3004 | ||
3005 | dbg_isoc("Transfer for epid %d is OUT", epid); | |
3006 | dbg_isoc("%d packets in URB", urb->number_of_packets); | |
3007 | ||
3008 | /* Create one SB descriptor for each packet and link them together. */ | |
3009 | for (i = 0; i < urb->number_of_packets; i++) { | |
3010 | if (!urb->iso_frame_desc[i].length) | |
3011 | continue; | |
3012 | ||
54e6ecb2 | 3013 | next_sb_desc = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, GFP_ATOMIC); |
1da177e4 LT |
3014 | assert(next_sb_desc != NULL); |
3015 | ||
3016 | if (urb->iso_frame_desc[i].length > 0) { | |
3017 | ||
3018 | next_sb_desc->command = (IO_STATE(USB_SB_command, tt, out) | | |
3019 | IO_STATE(USB_SB_command, eot, yes)); | |
3020 | ||
3021 | next_sb_desc->sw_len = urb->iso_frame_desc[i].length; | |
3022 | next_sb_desc->buf = virt_to_phys((char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset); | |
3023 | ||
3024 | /* Check if full length transfer. */ | |
3025 | if (urb->iso_frame_desc[i].length == | |
3026 | usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe))) { | |
3027 | next_sb_desc->command |= IO_STATE(USB_SB_command, full, yes); | |
3028 | } | |
3029 | } else { | |
3030 | dbg_isoc("zero len packet"); | |
3031 | next_sb_desc->command = (IO_FIELD(USB_SB_command, rem, 0) | | |
3032 | IO_STATE(USB_SB_command, tt, zout) | | |
3033 | IO_STATE(USB_SB_command, eot, yes) | | |
3034 | IO_STATE(USB_SB_command, full, yes)); | |
3035 | ||
3036 | next_sb_desc->sw_len = 1; | |
3037 | next_sb_desc->buf = virt_to_phys(&zout_buffer[0]); | |
3038 | } | |
3039 | ||
3040 | /* First SB descriptor that belongs to this urb */ | |
3041 | if (i == 0) | |
3042 | urb_priv->first_sb = next_sb_desc; | |
3043 | else | |
3044 | prev_sb_desc->next = virt_to_phys(next_sb_desc); | |
3045 | ||
3046 | prev_sb_desc = next_sb_desc; | |
3047 | } | |
3048 | ||
3049 | next_sb_desc->command |= (IO_STATE(USB_SB_command, intr, yes) | | |
3050 | IO_STATE(USB_SB_command, eol, yes)); | |
3051 | next_sb_desc->next = 0; | |
3052 | urb_priv->last_sb = next_sb_desc; | |
3053 | ||
3054 | } else if (usb_pipein(urb->pipe)) { | |
3055 | ||
3056 | dbg_isoc("Transfer for epid %d is IN", epid); | |
3057 | dbg_isoc("transfer_buffer_length = %d", urb->transfer_buffer_length); | |
3058 | dbg_isoc("rem is calculated to %d", urb->iso_frame_desc[urb->number_of_packets - 1].length); | |
3059 | ||
3060 | /* Note that in descriptors for periodic traffic are not consumed. This means that | |
3061 | the USB controller never propagates in the SB list. In other words, if there already | |
3062 | is an SB descriptor in the list for this EP we don't have to do anything. */ | |
3063 | if (TxIsocEPList[epid].sub == 0) { | |
3064 | dbg_isoc("Isoc traffic not already running, allocating SB"); | |
3065 | ||
54e6ecb2 | 3066 | next_sb_desc = (USB_SB_Desc_t*)kmem_cache_alloc(usb_desc_cache, GFP_ATOMIC); |
1da177e4 LT |
3067 | assert(next_sb_desc != NULL); |
3068 | ||
3069 | next_sb_desc->command = (IO_STATE(USB_SB_command, tt, in) | | |
3070 | IO_STATE(USB_SB_command, eot, yes) | | |
3071 | IO_STATE(USB_SB_command, eol, yes)); | |
3072 | ||
3073 | next_sb_desc->next = 0; | |
3074 | next_sb_desc->sw_len = 1; /* Actual number of packets is not relevant | |
3075 | for periodic in traffic as long as it is more | |
3076 | than zero. Set to 1 always. */ | |
3077 | next_sb_desc->buf = 0; | |
3078 | ||
3079 | /* The rem field is don't care for isoc traffic, so we don't set it. */ | |
3080 | ||
3081 | /* Only one SB descriptor that belongs to this urb. */ | |
3082 | urb_priv->first_sb = next_sb_desc; | |
3083 | urb_priv->last_sb = next_sb_desc; | |
3084 | ||
3085 | } else { | |
3086 | ||
3087 | dbg_isoc("Isoc traffic already running, just setting first/last_sb"); | |
3088 | ||
3089 | /* Each EP for isoc in will have only one SB descriptor, setup when submitting the | |
3090 | already active urb. Note that even though we may have several first_sb/last_sb | |
3091 | pointing at the same SB descriptor, they are freed only once (when the list has | |
3092 | become empty). */ | |
3093 | urb_priv->first_sb = phys_to_virt(TxIsocEPList[epid].sub); | |
3094 | urb_priv->last_sb = phys_to_virt(TxIsocEPList[epid].sub); | |
3095 | return; | |
3096 | } | |
3097 | ||
3098 | } | |
3099 | ||
3100 | /* Find the spot to insert this urb and add it. */ | |
3101 | if (TxIsocEPList[epid].sub == 0) { | |
3102 | /* First SB descriptor inserted in this list (in or out). */ | |
3103 | dbg_isoc("Inserting SB desc first in list"); | |
3104 | TxIsocEPList[epid].hw_len = 0; | |
3105 | TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb); | |
3106 | ||
3107 | } else { | |
3108 | /* Isochronous traffic is already running, insert new traffic last (only out). */ | |
3109 | dbg_isoc("Inserting SB desc last in list"); | |
3110 | temp_sb_desc = phys_to_virt(TxIsocEPList[epid].sub); | |
3111 | while ((temp_sb_desc->command & IO_MASK(USB_SB_command, eol)) != | |
3112 | IO_STATE(USB_SB_command, eol, yes)) { | |
3113 | assert(temp_sb_desc->next); | |
3114 | temp_sb_desc = phys_to_virt(temp_sb_desc->next); | |
3115 | } | |
3116 | dbg_isoc("Appending list on desc 0x%p", temp_sb_desc); | |
3117 | ||
3118 | /* Next pointer must be set before eol is removed. */ | |
3119 | temp_sb_desc->next = virt_to_phys(urb_priv->first_sb); | |
3120 | /* Clear the previous end of list flag since there is a new in the | |
3121 | added SB descriptor list. */ | |
3122 | temp_sb_desc->command &= ~IO_MASK(USB_SB_command, eol); | |
3123 | ||
3124 | if (!(TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable))) { | |
3125 | /* 8.8.5 in Designer's Reference says we should check for and correct | |
3126 | any errors in the EP here. That should not be necessary if epid_attn | |
3127 | is handled correctly, so we assume all is ok. */ | |
3128 | dbg_isoc("EP disabled"); | |
3129 | etrax_usb_check_error_isoc_ep(epid); | |
3130 | ||
3131 | /* The SB list was exhausted. */ | |
3132 | if (virt_to_phys(urb_priv->last_sb) != TxIsocEPList[epid].sub) { | |
3133 | /* The new sublist did not get processed before the EP was | |
3134 | disabled. Setup the EP again. */ | |
3135 | dbg_isoc("Set EP sub to new list"); | |
3136 | TxIsocEPList[epid].hw_len = 0; | |
3137 | TxIsocEPList[epid].sub = virt_to_phys(urb_priv->first_sb); | |
3138 | } | |
3139 | } | |
3140 | } | |
3141 | ||
3142 | if (urb->transfer_flags & URB_ISO_ASAP) { | |
3143 | /* The isoc transfer should be started as soon as possible. The start_frame | |
3144 | field is a return value if URB_ISO_ASAP was set. Comparing R_USB_FM_NUMBER | |
3145 | with a USB Chief trace shows that the first isoc IN token is sent 2 frames | |
3146 | later. I'm not sure how this affects usage of the start_frame field by the | |
3147 | device driver, or how it affects things when USB_ISO_ASAP is not set, so | |
3148 | therefore there's no compensation for the 2 frame "lag" here. */ | |
3149 | urb->start_frame = (*R_USB_FM_NUMBER & 0x7ff); | |
3150 | TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes); | |
3151 | urb_priv->urb_state = STARTED; | |
3152 | dbg_isoc("URB_ISO_ASAP set, urb->start_frame set to %d", urb->start_frame); | |
3153 | } else { | |
3154 | /* Not started yet. */ | |
3155 | urb_priv->urb_state = NOT_STARTED; | |
3156 | dbg_isoc("urb_priv->urb_state set to NOT_STARTED"); | |
3157 | } | |
3158 | ||
3159 | /* We start the DMA sub channel without checking if it's running or not, because: | |
3160 | 1) If it's already running, issuing the start command is a nop. | |
3161 | 2) We avoid a test-and-set race condition. */ | |
3162 | *R_DMA_CH8_SUB3_CMD = IO_STATE(R_DMA_CH8_SUB3_CMD, cmd, start); | |
3163 | ||
3164 | DBFEXIT; | |
3165 | } | |
3166 | ||
3167 | static void etrax_usb_complete_isoc_urb(struct urb *urb, int status) | |
3168 | { | |
3169 | etrax_urb_priv_t *urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
3170 | int epid = urb_priv->epid; | |
3171 | int auto_resubmit = 0; | |
3172 | ||
3173 | DBFENTER; | |
3174 | dbg_isoc("complete urb 0x%p, status %d", urb, status); | |
3175 | ||
3176 | if (status) | |
3177 | warn("Completing isoc urb with status %d.", status); | |
3178 | ||
3179 | if (usb_pipein(urb->pipe)) { | |
3180 | int i; | |
3181 | ||
3182 | /* Make that all isoc packets have status and length set before | |
3183 | completing the urb. */ | |
3184 | for (i = urb_priv->isoc_packet_counter; i < urb->number_of_packets; i++) { | |
3185 | urb->iso_frame_desc[i].actual_length = 0; | |
3186 | urb->iso_frame_desc[i].status = -EPROTO; | |
3187 | } | |
3188 | ||
3189 | urb_list_del(urb, epid); | |
3190 | ||
3191 | if (!list_empty(&urb_list[epid])) { | |
3192 | ((etrax_urb_priv_t *)(urb_list_first(epid)->hcpriv))->urb_state = STARTED; | |
3193 | } else { | |
3194 | unsigned long int flags; | |
3195 | if (TxIsocEPList[epid].command & IO_MASK(USB_EP_command, enable)) { | |
3196 | /* The EP was enabled, disable it and wait. */ | |
3197 | TxIsocEPList[epid].command &= ~IO_MASK(USB_EP_command, enable); | |
3198 | ||
3199 | /* Ah, the luxury of busy-wait. */ | |
3200 | while (*R_DMA_CH8_SUB3_EP == virt_to_phys(&TxIsocEPList[epid])); | |
3201 | } | |
3202 | ||
3203 | etrax_remove_from_sb_list(urb); | |
3204 | TxIsocEPList[epid].sub = 0; | |
3205 | TxIsocEPList[epid].hw_len = 0; | |
3206 | ||
3207 | save_flags(flags); | |
3208 | cli(); | |
3209 | etrax_usb_free_epid(epid); | |
3210 | restore_flags(flags); | |
3211 | } | |
3212 | ||
3213 | urb->hcpriv = 0; | |
3214 | kfree(urb_priv); | |
3215 | ||
3216 | /* Release allocated bandwidth. */ | |
3217 | usb_release_bandwidth(urb->dev, urb, 0); | |
3218 | } else if (usb_pipeout(urb->pipe)) { | |
3219 | int freed_descr; | |
3220 | ||
3221 | dbg_isoc("Isoc out urb complete 0x%p", urb); | |
3222 | ||
3223 | /* Update the urb list. */ | |
3224 | urb_list_del(urb, epid); | |
3225 | ||
3226 | freed_descr = etrax_remove_from_sb_list(urb); | |
3227 | dbg_isoc("freed %d descriptors of %d packets", freed_descr, urb->number_of_packets); | |
3228 | assert(freed_descr == urb->number_of_packets); | |
3229 | urb->hcpriv = 0; | |
3230 | kfree(urb_priv); | |
3231 | ||
3232 | /* Release allocated bandwidth. */ | |
3233 | usb_release_bandwidth(urb->dev, urb, 0); | |
3234 | } | |
3235 | ||
3236 | urb->status = status; | |
3237 | if (urb->complete) { | |
3238 | urb->complete(urb, NULL); | |
3239 | } | |
3240 | ||
3241 | if (auto_resubmit) { | |
3242 | /* Check that urb was not unlinked by the complete callback. */ | |
3243 | if (__urb_list_entry(urb, epid)) { | |
3244 | /* Move this one down the list. */ | |
3245 | urb_list_move_last(urb, epid); | |
3246 | ||
3247 | /* Mark the now first urb as started (may already be). */ | |
3248 | ((etrax_urb_priv_t *)(urb_list_first(epid)->hcpriv))->urb_state = STARTED; | |
3249 | ||
3250 | /* Must set this to 0 since this urb is still active after | |
3251 | completion. */ | |
3252 | urb_priv->isoc_packet_counter = 0; | |
3253 | } else { | |
3254 | warn("(ISOC) automatic resubmit urb 0x%p removed by complete.", urb); | |
3255 | } | |
3256 | } | |
3257 | ||
3258 | DBFEXIT; | |
3259 | } | |
3260 | ||
3261 | static void etrax_usb_complete_urb(struct urb *urb, int status) | |
3262 | { | |
3263 | switch (usb_pipetype(urb->pipe)) { | |
3264 | case PIPE_BULK: | |
3265 | etrax_usb_complete_bulk_urb(urb, status); | |
3266 | break; | |
3267 | case PIPE_CONTROL: | |
3268 | etrax_usb_complete_ctrl_urb(urb, status); | |
3269 | break; | |
3270 | case PIPE_INTERRUPT: | |
3271 | etrax_usb_complete_intr_urb(urb, status); | |
3272 | break; | |
3273 | case PIPE_ISOCHRONOUS: | |
3274 | etrax_usb_complete_isoc_urb(urb, status); | |
3275 | break; | |
3276 | default: | |
3277 | err("Unknown pipetype"); | |
3278 | } | |
3279 | } | |
3280 | ||
3281 | ||
3282 | ||
7d12e780 | 3283 | static irqreturn_t etrax_usb_hc_interrupt_top_half(int irq, void *vhc) |
1da177e4 LT |
3284 | { |
3285 | usb_interrupt_registers_t *reg; | |
3286 | unsigned long flags; | |
3287 | __u32 irq_mask; | |
3288 | __u8 status; | |
3289 | __u32 epid_attn; | |
3290 | __u16 port_status_1; | |
3291 | __u16 port_status_2; | |
3292 | __u32 fm_number; | |
3293 | ||
3294 | DBFENTER; | |
3295 | ||
3296 | /* Read critical registers into local variables, do kmalloc afterwards. */ | |
3297 | save_flags(flags); | |
3298 | cli(); | |
3299 | ||
3300 | irq_mask = *R_USB_IRQ_MASK_READ; | |
3301 | /* Reading R_USB_STATUS clears the ctl_status interrupt. Note that R_USB_STATUS | |
3302 | must be read before R_USB_EPID_ATTN since reading the latter clears the | |
3303 | ourun and perror fields of R_USB_STATUS. */ | |
3304 | status = *R_USB_STATUS; | |
3305 | ||
3306 | /* Reading R_USB_EPID_ATTN clears the iso_eof, bulk_eot and epid_attn interrupts. */ | |
3307 | epid_attn = *R_USB_EPID_ATTN; | |
3308 | ||
3309 | /* Reading R_USB_RH_PORT_STATUS_1 and R_USB_RH_PORT_STATUS_2 clears the | |
3310 | port_status interrupt. */ | |
3311 | port_status_1 = *R_USB_RH_PORT_STATUS_1; | |
3312 | port_status_2 = *R_USB_RH_PORT_STATUS_2; | |
3313 | ||
3314 | /* Reading R_USB_FM_NUMBER clears the sof interrupt. */ | |
3315 | /* Note: the lower 11 bits contain the actual frame number, sent with each sof. */ | |
3316 | fm_number = *R_USB_FM_NUMBER; | |
3317 | ||
3318 | restore_flags(flags); | |
3319 | ||
54e6ecb2 | 3320 | reg = (usb_interrupt_registers_t *)kmem_cache_alloc(top_half_reg_cache, GFP_ATOMIC); |
1da177e4 LT |
3321 | |
3322 | assert(reg != NULL); | |
3323 | ||
3324 | reg->hc = (etrax_hc_t *)vhc; | |
3325 | ||
3326 | /* Now put register values into kmalloc'd area. */ | |
3327 | reg->r_usb_irq_mask_read = irq_mask; | |
3328 | reg->r_usb_status = status; | |
3329 | reg->r_usb_epid_attn = epid_attn; | |
3330 | reg->r_usb_rh_port_status_1 = port_status_1; | |
3331 | reg->r_usb_rh_port_status_2 = port_status_2; | |
3332 | reg->r_usb_fm_number = fm_number; | |
3333 | ||
3334 | INIT_WORK(®->usb_bh, etrax_usb_hc_interrupt_bottom_half, reg); | |
3335 | schedule_work(®->usb_bh); | |
3336 | ||
3337 | DBFEXIT; | |
3338 | ||
3339 | return IRQ_HANDLED; | |
3340 | } | |
3341 | ||
3342 | static void etrax_usb_hc_interrupt_bottom_half(void *data) | |
3343 | { | |
3344 | usb_interrupt_registers_t *reg = (usb_interrupt_registers_t *)data; | |
3345 | __u32 irq_mask = reg->r_usb_irq_mask_read; | |
3346 | ||
3347 | DBFENTER; | |
3348 | ||
3349 | /* Interrupts are handled in order of priority. */ | |
3350 | if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, epid_attn)) { | |
3351 | etrax_usb_hc_epid_attn_interrupt(reg); | |
3352 | } | |
3353 | if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, port_status)) { | |
3354 | etrax_usb_hc_port_status_interrupt(reg); | |
3355 | } | |
3356 | if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, ctl_status)) { | |
3357 | etrax_usb_hc_ctl_status_interrupt(reg); | |
3358 | } | |
3359 | if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, iso_eof)) { | |
3360 | etrax_usb_hc_isoc_eof_interrupt(); | |
3361 | } | |
3362 | if (irq_mask & IO_MASK(R_USB_IRQ_MASK_READ, bulk_eot)) { | |
3363 | /* Update/restart the bulk start timer since obviously the channel is running. */ | |
3364 | mod_timer(&bulk_start_timer, jiffies + BULK_START_TIMER_INTERVAL); | |
3365 | /* Update/restart the bulk eot timer since we just received an bulk eot interrupt. */ | |
3366 | mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL); | |
3367 | ||
3368 | etrax_usb_hc_bulk_eot_interrupt(0); | |
3369 | } | |
3370 | ||
3371 | kmem_cache_free(top_half_reg_cache, reg); | |
3372 | ||
3373 | DBFEXIT; | |
3374 | } | |
3375 | ||
3376 | ||
3377 | void etrax_usb_hc_isoc_eof_interrupt(void) | |
3378 | { | |
3379 | struct urb *urb; | |
3380 | etrax_urb_priv_t *urb_priv; | |
3381 | int epid; | |
3382 | unsigned long flags; | |
3383 | ||
3384 | DBFENTER; | |
3385 | ||
3386 | /* Do not check the invalid epid (it has a valid sub pointer). */ | |
3387 | for (epid = 0; epid < NBR_OF_EPIDS - 1; epid++) { | |
3388 | ||
3389 | /* Do not check the invalid epid (it has a valid sub pointer). */ | |
3390 | if ((epid == DUMMY_EPID) || (epid == INVALID_EPID)) | |
3391 | continue; | |
3392 | ||
3393 | /* Disable interrupts to block the isoc out descriptor interrupt handler | |
3394 | from being called while the isoc EPID list is being checked. | |
3395 | */ | |
3396 | save_flags(flags); | |
3397 | cli(); | |
3398 | ||
3399 | if (TxIsocEPList[epid].sub == 0) { | |
3400 | /* Nothing here to see. */ | |
3401 | restore_flags(flags); | |
3402 | continue; | |
3403 | } | |
3404 | ||
3405 | /* Get the first urb (if any). */ | |
3406 | urb = urb_list_first(epid); | |
3407 | if (urb == 0) { | |
3408 | warn("Ignoring NULL urb"); | |
3409 | restore_flags(flags); | |
3410 | continue; | |
3411 | } | |
3412 | if (usb_pipein(urb->pipe)) { | |
3413 | ||
3414 | /* Sanity check. */ | |
3415 | assert(usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS); | |
3416 | ||
3417 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
3418 | assert(urb_priv); | |
3419 | ||
3420 | if (urb_priv->urb_state == NOT_STARTED) { | |
3421 | ||
3422 | /* If ASAP is not set and urb->start_frame is the current frame, | |
3423 | start the transfer. */ | |
3424 | if (!(urb->transfer_flags & URB_ISO_ASAP) && | |
3425 | (urb->start_frame == (*R_USB_FM_NUMBER & 0x7ff))) { | |
3426 | ||
3427 | dbg_isoc("Enabling isoc IN EP descr for epid %d", epid); | |
3428 | TxIsocEPList[epid].command |= IO_STATE(USB_EP_command, enable, yes); | |
3429 | ||
3430 | /* This urb is now active. */ | |
3431 | urb_priv->urb_state = STARTED; | |
3432 | continue; | |
3433 | } | |
3434 | } | |
3435 | } | |
3436 | restore_flags(flags); | |
3437 | } | |
3438 | ||
3439 | DBFEXIT; | |
3440 | ||
3441 | } | |
3442 | ||
3443 | void etrax_usb_hc_bulk_eot_interrupt(int timer_induced) | |
3444 | { | |
3445 | int epid; | |
3446 | ||
3447 | /* The technique is to run one urb at a time, wait for the eot interrupt at which | |
3448 | point the EP descriptor has been disabled. */ | |
3449 | ||
3450 | DBFENTER; | |
3451 | dbg_bulk("bulk eot%s", timer_induced ? ", called by timer" : ""); | |
3452 | ||
3453 | for (epid = 0; epid < NBR_OF_EPIDS; epid++) { | |
3454 | ||
3455 | if (!(TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) && | |
3456 | (TxBulkEPList[epid].sub != 0)) { | |
3457 | ||
3458 | struct urb *urb; | |
3459 | etrax_urb_priv_t *urb_priv; | |
3460 | unsigned long flags; | |
3461 | __u32 r_usb_ept_data; | |
3462 | ||
3463 | /* Found a disabled EP descriptor which has a non-null sub pointer. | |
3464 | Verify that this ctrl EP descriptor got disabled no errors. | |
3465 | FIXME: Necessary to check error_code? */ | |
3466 | dbg_bulk("for epid %d?", epid); | |
3467 | ||
3468 | /* Get the first urb. */ | |
3469 | urb = urb_list_first(epid); | |
3470 | ||
3471 | /* FIXME: Could this happen for valid reasons? Why did it disappear? Because of | |
3472 | wrong unlinking? */ | |
3473 | if (!urb) { | |
3474 | warn("NULL urb for epid %d", epid); | |
3475 | continue; | |
3476 | } | |
3477 | ||
3478 | assert(urb); | |
3479 | urb_priv = (etrax_urb_priv_t *)urb->hcpriv; | |
3480 | assert(urb_priv); | |
3481 | ||
3482 | /* Sanity checks. */ | |
3483 | assert(usb_pipetype(urb->pipe) == PIPE_BULK); | |
3484 | if (phys_to_virt(TxBulkEPList[epid].sub) != urb_priv->last_sb) { | |
3485 | err("bulk endpoint got disabled before reaching last sb"); | |
3486 | } | |
3487 | ||
3488 | /* For bulk IN traffic, there seems to be a race condition between | |
3489 | between the bulk eot and eop interrupts, or rather an uncertainty regarding | |
3490 | the order in which they happen. Normally we expect the eop interrupt from | |
3491 | DMA channel 9 to happen before the eot interrupt. | |
3492 | ||
3493 | Therefore, we complete the bulk IN urb in the rx interrupt handler instead. */ | |
3494 | ||
3495 | if (usb_pipein(urb->pipe)) { | |
3496 | dbg_bulk("in urb, continuing"); | |
3497 | continue; | |
3498 | } | |
3499 | ||
3500 | save_flags(flags); | |
3501 | cli(); | |
3502 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
3503 | nop(); | |
3504 | r_usb_ept_data = *R_USB_EPT_DATA; | |
3505 | restore_flags(flags); | |
3506 | ||
3507 | if (IO_EXTRACT(R_USB_EPT_DATA, error_code, r_usb_ept_data) == | |
3508 | IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) { | |
3509 | /* This means that the endpoint has no error, is disabled | |
3510 | and had inserted traffic, i.e. transfer successfully completed. */ | |
3511 | etrax_usb_complete_bulk_urb(urb, 0); | |
3512 | } else { | |
3513 | /* Shouldn't happen. We expect errors to be caught by epid attention. */ | |
3514 | err("Found disabled bulk EP desc, error_code != no_error"); | |
3515 | } | |
3516 | } | |
3517 | } | |
3518 | ||
3519 | /* Normally, we should find (at least) one disabled EP descriptor with a valid sub pointer. | |
3520 | However, because of the uncertainty in the deliverance of the eop/eot interrupts, we may | |
3521 | not. Also, we might find two disabled EPs when handling an eot interrupt, and then find | |
3522 | none the next time. */ | |
3523 | ||
3524 | DBFEXIT; | |
3525 | ||
3526 | } | |
3527 | ||
3528 | void etrax_usb_hc_epid_attn_interrupt(usb_interrupt_registers_t *reg) | |
3529 | { | |
3530 | /* This function handles the epid attention interrupt. There are a variety of reasons | |
3531 | for this interrupt to happen (Designer's Reference, p. 8 - 22 for the details): | |
3532 | ||
3533 | invalid ep_id - Invalid epid in an EP (EP disabled). | |
3534 | stall - Not strictly an error condition (EP disabled). | |
3535 | 3rd error - Three successive transaction errors (EP disabled). | |
3536 | buffer ourun - Buffer overrun or underrun (EP disabled). | |
3537 | past eof1 - Intr or isoc transaction proceeds past EOF1. | |
3538 | near eof - Intr or isoc transaction would not fit inside the frame. | |
3539 | zout transfer - If zout transfer for a bulk endpoint (EP disabled). | |
3540 | setup transfer - If setup transfer for a non-ctrl endpoint (EP disabled). */ | |
3541 | ||
3542 | int epid; | |
3543 | ||
3544 | ||
3545 | DBFENTER; | |
3546 | ||
3547 | assert(reg != NULL); | |
3548 | ||
3549 | /* Note that we loop through all epids. We still want to catch errors for | |
3550 | the invalid one, even though we might handle them differently. */ | |
3551 | for (epid = 0; epid < NBR_OF_EPIDS; epid++) { | |
3552 | ||
3553 | if (test_bit(epid, (void *)®->r_usb_epid_attn)) { | |
3554 | ||
3555 | struct urb *urb; | |
3556 | __u32 r_usb_ept_data; | |
3557 | unsigned long flags; | |
3558 | int error_code; | |
3559 | ||
3560 | save_flags(flags); | |
3561 | cli(); | |
3562 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, epid); | |
3563 | nop(); | |
3564 | /* Note that although there are separate R_USB_EPT_DATA and R_USB_EPT_DATA_ISO | |
3565 | registers, they are located at the same address and are of the same size. | |
3566 | In other words, this read should be ok for isoc also. */ | |
3567 | r_usb_ept_data = *R_USB_EPT_DATA; | |
3568 | restore_flags(flags); | |
3569 | ||
3570 | /* First some sanity checks. */ | |
3571 | if (epid == INVALID_EPID) { | |
3572 | /* FIXME: What if it became disabled? Could seriously hurt interrupt | |
3573 | traffic. (Use do_intr_recover.) */ | |
3574 | warn("Got epid_attn for INVALID_EPID (%d).", epid); | |
3575 | err("R_USB_EPT_DATA = 0x%x", r_usb_ept_data); | |
3576 | err("R_USB_STATUS = 0x%x", reg->r_usb_status); | |
3577 | continue; | |
3578 | } else if (epid == DUMMY_EPID) { | |
3579 | /* We definitely don't care about these ones. Besides, they are | |
3580 | always disabled, so any possible disabling caused by the | |
3581 | epid attention interrupt is irrelevant. */ | |
3582 | warn("Got epid_attn for DUMMY_EPID (%d).", epid); | |
3583 | continue; | |
3584 | } | |
3585 | ||
3586 | /* Get the first urb in the urb list for this epid. We blatantly assume | |
3587 | that only the first urb could have caused the epid attention. | |
3588 | (For bulk and ctrl, only one urb is active at any one time. For intr | |
3589 | and isoc we remove them once they are completed.) */ | |
3590 | urb = urb_list_first(epid); | |
3591 | ||
3592 | if (urb == NULL) { | |
3593 | err("Got epid_attn for epid %i with no urb.", epid); | |
3594 | err("R_USB_EPT_DATA = 0x%x", r_usb_ept_data); | |
3595 | err("R_USB_STATUS = 0x%x", reg->r_usb_status); | |
3596 | continue; | |
3597 | } | |
3598 | ||
3599 | switch (usb_pipetype(urb->pipe)) { | |
3600 | case PIPE_BULK: | |
3601 | warn("Got epid attn for bulk endpoint, epid %d", epid); | |
3602 | break; | |
3603 | case PIPE_CONTROL: | |
3604 | warn("Got epid attn for control endpoint, epid %d", epid); | |
3605 | break; | |
3606 | case PIPE_INTERRUPT: | |
3607 | warn("Got epid attn for interrupt endpoint, epid %d", epid); | |
3608 | break; | |
3609 | case PIPE_ISOCHRONOUS: | |
3610 | warn("Got epid attn for isochronous endpoint, epid %d", epid); | |
3611 | break; | |
3612 | } | |
3613 | ||
3614 | if (usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) { | |
3615 | if (r_usb_ept_data & IO_MASK(R_USB_EPT_DATA, hold)) { | |
3616 | warn("Hold was set for epid %d.", epid); | |
3617 | continue; | |
3618 | } | |
3619 | } | |
3620 | ||
3621 | /* Even though error_code occupies bits 22 - 23 in both R_USB_EPT_DATA and | |
3622 | R_USB_EPT_DATA_ISOC, we separate them here so we don't forget in other places. */ | |
3623 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
3624 | error_code = IO_EXTRACT(R_USB_EPT_DATA_ISO, error_code, r_usb_ept_data); | |
3625 | } else { | |
3626 | error_code = IO_EXTRACT(R_USB_EPT_DATA, error_code, r_usb_ept_data); | |
3627 | } | |
3628 | ||
3629 | /* Using IO_STATE_VALUE on R_USB_EPT_DATA should be ok for isoc also. */ | |
3630 | if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, no_error)) { | |
3631 | ||
3632 | /* Isoc traffic doesn't have error_count_in/error_count_out. */ | |
3633 | if ((usb_pipetype(urb->pipe) != PIPE_ISOCHRONOUS) && | |
3634 | (IO_EXTRACT(R_USB_EPT_DATA, error_count_in, r_usb_ept_data) == 3 || | |
3635 | IO_EXTRACT(R_USB_EPT_DATA, error_count_out, r_usb_ept_data) == 3)) { | |
3636 | /* 3rd error. */ | |
3637 | warn("3rd error for epid %i", epid); | |
3638 | etrax_usb_complete_urb(urb, -EPROTO); | |
3639 | ||
3640 | } else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) { | |
3641 | ||
3642 | warn("Perror for epid %d", epid); | |
3643 | ||
3644 | if (!(r_usb_ept_data & IO_MASK(R_USB_EPT_DATA, valid))) { | |
3645 | /* invalid ep_id */ | |
3646 | panic("Perror because of invalid epid." | |
3647 | " Deconfigured too early?"); | |
3648 | } else { | |
3649 | /* past eof1, near eof, zout transfer, setup transfer */ | |
3650 | ||
3651 | /* Dump the urb and the relevant EP descriptor list. */ | |
3652 | ||
3653 | __dump_urb(urb); | |
3654 | __dump_ept_data(epid); | |
3655 | __dump_ep_list(usb_pipetype(urb->pipe)); | |
3656 | ||
3657 | panic("Something wrong with DMA descriptor contents." | |
3658 | " Too much traffic inserted?"); | |
3659 | } | |
3660 | } else if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) { | |
3661 | /* buffer ourun */ | |
3662 | panic("Buffer overrun/underrun for epid %d. DMA too busy?", epid); | |
3663 | } | |
3664 | ||
3665 | } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, stall)) { | |
3666 | /* Not really a protocol error, just says that the endpoint gave | |
3667 | a stall response. Note that error_code cannot be stall for isoc. */ | |
3668 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { | |
3669 | panic("Isoc traffic cannot stall"); | |
3670 | } | |
3671 | ||
3672 | warn("Stall for epid %d", epid); | |
3673 | etrax_usb_complete_urb(urb, -EPIPE); | |
3674 | ||
3675 | } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, bus_error)) { | |
3676 | /* Two devices responded to a transaction request. Must be resolved | |
3677 | by software. FIXME: Reset ports? */ | |
3678 | panic("Bus error for epid %d." | |
3679 | " Two devices responded to transaction request", | |
3680 | epid); | |
3681 | ||
3682 | } else if (error_code == IO_STATE_VALUE(R_USB_EPT_DATA, error_code, buffer_error)) { | |
3683 | /* DMA overrun or underrun. */ | |
3684 | warn("Buffer overrun/underrun for epid %d. DMA too busy?", epid); | |
3685 | ||
3686 | /* It seems that error_code = buffer_error in | |
3687 | R_USB_EPT_DATA/R_USB_EPT_DATA_ISO and ourun = yes in R_USB_STATUS | |
3688 | are the same error. */ | |
3689 | etrax_usb_complete_urb(urb, -EPROTO); | |
3690 | } | |
3691 | } | |
3692 | } | |
3693 | ||
3694 | DBFEXIT; | |
3695 | ||
3696 | } | |
3697 | ||
3698 | void etrax_usb_bulk_start_timer_func(unsigned long dummy) | |
3699 | { | |
3700 | ||
3701 | /* We might enable an EP descriptor behind the current DMA position when it's about | |
3702 | to decide that there are no more bulk traffic and it should stop the bulk channel. | |
3703 | Therefore we periodically check if the bulk channel is stopped and there is an | |
3704 | enabled bulk EP descriptor, in which case we start the bulk channel. */ | |
3705 | dbg_bulk("bulk_start_timer timed out."); | |
3706 | ||
3707 | if (!(*R_DMA_CH8_SUB0_CMD & IO_MASK(R_DMA_CH8_SUB0_CMD, cmd))) { | |
3708 | int epid; | |
3709 | ||
3710 | dbg_bulk("Bulk DMA channel not running."); | |
3711 | ||
3712 | for (epid = 0; epid < NBR_OF_EPIDS; epid++) { | |
3713 | if (TxBulkEPList[epid].command & IO_MASK(USB_EP_command, enable)) { | |
3714 | dbg_bulk("Found enabled EP for epid %d, starting bulk channel.\n", | |
3715 | epid); | |
3716 | *R_DMA_CH8_SUB0_CMD = IO_STATE(R_DMA_CH8_SUB0_CMD, cmd, start); | |
3717 | ||
3718 | /* Restart the bulk eot timer since we just started the bulk channel. */ | |
3719 | mod_timer(&bulk_eot_timer, jiffies + BULK_EOT_TIMER_INTERVAL); | |
3720 | ||
3721 | /* No need to search any further. */ | |
3722 | break; | |
3723 | } | |
3724 | } | |
3725 | } else { | |
3726 | dbg_bulk("Bulk DMA channel running."); | |
3727 | } | |
3728 | } | |
3729 | ||
3730 | void etrax_usb_hc_port_status_interrupt(usb_interrupt_registers_t *reg) | |
3731 | { | |
3732 | etrax_hc_t *hc = reg->hc; | |
3733 | __u16 r_usb_rh_port_status_1 = reg->r_usb_rh_port_status_1; | |
3734 | __u16 r_usb_rh_port_status_2 = reg->r_usb_rh_port_status_2; | |
3735 | ||
3736 | DBFENTER; | |
3737 | ||
3738 | /* The Etrax RH does not include a wPortChange register, so this has to be handled in software | |
3739 | (by saving the old port status value for comparison when the port status interrupt happens). | |
3740 | See section 11.16.2.6.2 in the USB 1.1 spec for details. */ | |
3741 | ||
3742 | dbg_rh("hc->rh.prev_wPortStatus_1 = 0x%x", hc->rh.prev_wPortStatus_1); | |
3743 | dbg_rh("hc->rh.prev_wPortStatus_2 = 0x%x", hc->rh.prev_wPortStatus_2); | |
3744 | dbg_rh("r_usb_rh_port_status_1 = 0x%x", r_usb_rh_port_status_1); | |
3745 | dbg_rh("r_usb_rh_port_status_2 = 0x%x", r_usb_rh_port_status_2); | |
3746 | ||
3747 | /* C_PORT_CONNECTION is set on any transition. */ | |
3748 | hc->rh.wPortChange_1 |= | |
3749 | ((r_usb_rh_port_status_1 & (1 << RH_PORT_CONNECTION)) != | |
3750 | (hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_CONNECTION))) ? | |
3751 | (1 << RH_PORT_CONNECTION) : 0; | |
3752 | ||
3753 | hc->rh.wPortChange_2 |= | |
3754 | ((r_usb_rh_port_status_2 & (1 << RH_PORT_CONNECTION)) != | |
3755 | (hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_CONNECTION))) ? | |
3756 | (1 << RH_PORT_CONNECTION) : 0; | |
3757 | ||
3758 | /* C_PORT_ENABLE is _only_ set on a one to zero transition, i.e. when | |
3759 | the port is disabled, not when it's enabled. */ | |
3760 | hc->rh.wPortChange_1 |= | |
3761 | ((hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_ENABLE)) | |
3762 | && !(r_usb_rh_port_status_1 & (1 << RH_PORT_ENABLE))) ? | |
3763 | (1 << RH_PORT_ENABLE) : 0; | |
3764 | ||
3765 | hc->rh.wPortChange_2 |= | |
3766 | ((hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_ENABLE)) | |
3767 | && !(r_usb_rh_port_status_2 & (1 << RH_PORT_ENABLE))) ? | |
3768 | (1 << RH_PORT_ENABLE) : 0; | |
3769 | ||
3770 | /* C_PORT_SUSPEND is set to one when the device has transitioned out | |
3771 | of the suspended state, i.e. when suspend goes from one to zero. */ | |
3772 | hc->rh.wPortChange_1 |= | |
3773 | ((hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_SUSPEND)) | |
3774 | && !(r_usb_rh_port_status_1 & (1 << RH_PORT_SUSPEND))) ? | |
3775 | (1 << RH_PORT_SUSPEND) : 0; | |
3776 | ||
3777 | hc->rh.wPortChange_2 |= | |
3778 | ((hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_SUSPEND)) | |
3779 | && !(r_usb_rh_port_status_2 & (1 << RH_PORT_SUSPEND))) ? | |
3780 | (1 << RH_PORT_SUSPEND) : 0; | |
3781 | ||
3782 | ||
3783 | /* C_PORT_RESET is set when reset processing on this port is complete. */ | |
3784 | hc->rh.wPortChange_1 |= | |
3785 | ((hc->rh.prev_wPortStatus_1 & (1 << RH_PORT_RESET)) | |
3786 | && !(r_usb_rh_port_status_1 & (1 << RH_PORT_RESET))) ? | |
3787 | (1 << RH_PORT_RESET) : 0; | |
3788 | ||
3789 | hc->rh.wPortChange_2 |= | |
3790 | ((hc->rh.prev_wPortStatus_2 & (1 << RH_PORT_RESET)) | |
3791 | && !(r_usb_rh_port_status_2 & (1 << RH_PORT_RESET))) ? | |
3792 | (1 << RH_PORT_RESET) : 0; | |
3793 | ||
3794 | /* Save the new values for next port status change. */ | |
3795 | hc->rh.prev_wPortStatus_1 = r_usb_rh_port_status_1; | |
3796 | hc->rh.prev_wPortStatus_2 = r_usb_rh_port_status_2; | |
3797 | ||
3798 | dbg_rh("hc->rh.wPortChange_1 set to 0x%x", hc->rh.wPortChange_1); | |
3799 | dbg_rh("hc->rh.wPortChange_2 set to 0x%x", hc->rh.wPortChange_2); | |
3800 | ||
3801 | DBFEXIT; | |
3802 | ||
3803 | } | |
3804 | ||
3805 | void etrax_usb_hc_ctl_status_interrupt(usb_interrupt_registers_t *reg) | |
3806 | { | |
3807 | DBFENTER; | |
3808 | ||
3809 | /* FIXME: What should we do if we get ourun or perror? Dump the EP and SB | |
3810 | list for the corresponding epid? */ | |
3811 | if (reg->r_usb_status & IO_MASK(R_USB_STATUS, ourun)) { | |
3812 | panic("USB controller got ourun."); | |
3813 | } | |
3814 | if (reg->r_usb_status & IO_MASK(R_USB_STATUS, perror)) { | |
3815 | ||
3816 | /* Before, etrax_usb_do_intr_recover was called on this epid if it was | |
3817 | an interrupt pipe. I don't see how re-enabling all EP descriptors | |
3818 | will help if there was a programming error. */ | |
3819 | panic("USB controller got perror."); | |
3820 | } | |
3821 | ||
3822 | if (reg->r_usb_status & IO_MASK(R_USB_STATUS, device_mode)) { | |
3823 | /* We should never operate in device mode. */ | |
3824 | panic("USB controller in device mode."); | |
3825 | } | |
3826 | ||
3827 | /* These if-statements could probably be nested. */ | |
3828 | if (reg->r_usb_status & IO_MASK(R_USB_STATUS, host_mode)) { | |
3829 | info("USB controller in host mode."); | |
3830 | } | |
3831 | if (reg->r_usb_status & IO_MASK(R_USB_STATUS, started)) { | |
3832 | info("USB controller started."); | |
3833 | } | |
3834 | if (reg->r_usb_status & IO_MASK(R_USB_STATUS, running)) { | |
3835 | info("USB controller running."); | |
3836 | } | |
3837 | ||
3838 | DBFEXIT; | |
3839 | ||
3840 | } | |
3841 | ||
3842 | ||
3843 | static int etrax_rh_submit_urb(struct urb *urb) | |
3844 | { | |
3845 | struct usb_device *usb_dev = urb->dev; | |
3846 | etrax_hc_t *hc = usb_dev->bus->hcpriv; | |
3847 | unsigned int pipe = urb->pipe; | |
3848 | struct usb_ctrlrequest *cmd = (struct usb_ctrlrequest *) urb->setup_packet; | |
3849 | void *data = urb->transfer_buffer; | |
3850 | int leni = urb->transfer_buffer_length; | |
3851 | int len = 0; | |
3852 | int stat = 0; | |
3853 | ||
3854 | __u16 bmRType_bReq; | |
3855 | __u16 wValue; | |
3856 | __u16 wIndex; | |
3857 | __u16 wLength; | |
3858 | ||
3859 | DBFENTER; | |
3860 | ||
3861 | /* FIXME: What is this interrupt urb that is sent to the root hub? */ | |
3862 | if (usb_pipetype (pipe) == PIPE_INTERRUPT) { | |
3863 | dbg_rh("Root-Hub submit IRQ: every %d ms", urb->interval); | |
3864 | hc->rh.urb = urb; | |
3865 | hc->rh.send = 1; | |
3866 | /* FIXME: We could probably remove this line since it's done | |
3867 | in etrax_rh_init_int_timer. (Don't remove it from | |
3868 | etrax_rh_init_int_timer though.) */ | |
3869 | hc->rh.interval = urb->interval; | |
3870 | etrax_rh_init_int_timer(urb); | |
3871 | DBFEXIT; | |
3872 | ||
3873 | return 0; | |
3874 | } | |
3875 | ||
3876 | bmRType_bReq = cmd->bRequestType | (cmd->bRequest << 8); | |
3877 | wValue = le16_to_cpu(cmd->wValue); | |
3878 | wIndex = le16_to_cpu(cmd->wIndex); | |
3879 | wLength = le16_to_cpu(cmd->wLength); | |
3880 | ||
3881 | dbg_rh("bmRType_bReq : 0x%04x (%d)", bmRType_bReq, bmRType_bReq); | |
3882 | dbg_rh("wValue : 0x%04x (%d)", wValue, wValue); | |
3883 | dbg_rh("wIndex : 0x%04x (%d)", wIndex, wIndex); | |
3884 | dbg_rh("wLength : 0x%04x (%d)", wLength, wLength); | |
3885 | ||
3886 | switch (bmRType_bReq) { | |
3887 | ||
3888 | /* Request Destination: | |
3889 | without flags: Device, | |
3890 | RH_INTERFACE: interface, | |
3891 | RH_ENDPOINT: endpoint, | |
3892 | RH_CLASS means HUB here, | |
3893 | RH_OTHER | RH_CLASS almost ever means HUB_PORT here | |
3894 | */ | |
3895 | ||
3896 | case RH_GET_STATUS: | |
3897 | *(__u16 *) data = cpu_to_le16 (1); | |
3898 | OK (2); | |
3899 | ||
3900 | case RH_GET_STATUS | RH_INTERFACE: | |
3901 | *(__u16 *) data = cpu_to_le16 (0); | |
3902 | OK (2); | |
3903 | ||
3904 | case RH_GET_STATUS | RH_ENDPOINT: | |
3905 | *(__u16 *) data = cpu_to_le16 (0); | |
3906 | OK (2); | |
3907 | ||
3908 | case RH_GET_STATUS | RH_CLASS: | |
3909 | *(__u32 *) data = cpu_to_le32 (0); | |
3910 | OK (4); /* hub power ** */ | |
3911 | ||
3912 | case RH_GET_STATUS | RH_OTHER | RH_CLASS: | |
3913 | if (wIndex == 1) { | |
3914 | *((__u16*)data) = cpu_to_le16(hc->rh.prev_wPortStatus_1); | |
3915 | *((__u16*)data + 1) = cpu_to_le16(hc->rh.wPortChange_1); | |
3916 | } else if (wIndex == 2) { | |
3917 | *((__u16*)data) = cpu_to_le16(hc->rh.prev_wPortStatus_2); | |
3918 | *((__u16*)data + 1) = cpu_to_le16(hc->rh.wPortChange_2); | |
3919 | } else { | |
3920 | dbg_rh("RH_GET_STATUS whith invalid wIndex!"); | |
3921 | OK(0); | |
3922 | } | |
3923 | ||
3924 | OK(4); | |
3925 | ||
3926 | case RH_CLEAR_FEATURE | RH_ENDPOINT: | |
3927 | switch (wValue) { | |
3928 | case (RH_ENDPOINT_STALL): | |
3929 | OK (0); | |
3930 | } | |
3931 | break; | |
3932 | ||
3933 | case RH_CLEAR_FEATURE | RH_CLASS: | |
3934 | switch (wValue) { | |
3935 | case (RH_C_HUB_OVER_CURRENT): | |
3936 | OK (0); /* hub power over current ** */ | |
3937 | } | |
3938 | break; | |
3939 | ||
3940 | case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS: | |
3941 | switch (wValue) { | |
3942 | case (RH_PORT_ENABLE): | |
3943 | if (wIndex == 1) { | |
3944 | ||
3945 | dbg_rh("trying to do disable port 1"); | |
3946 | ||
3947 | *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, yes); | |
3948 | ||
3949 | while (hc->rh.prev_wPortStatus_1 & | |
3950 | IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes)); | |
3951 | *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no); | |
3952 | dbg_rh("Port 1 is disabled"); | |
3953 | ||
3954 | } else if (wIndex == 2) { | |
3955 | ||
3956 | dbg_rh("trying to do disable port 2"); | |
3957 | ||
3958 | *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, yes); | |
3959 | ||
3960 | while (hc->rh.prev_wPortStatus_2 & | |
3961 | IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, yes)); | |
3962 | *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no); | |
3963 | dbg_rh("Port 2 is disabled"); | |
3964 | ||
3965 | } else { | |
3966 | dbg_rh("RH_CLEAR_FEATURE->RH_PORT_ENABLE " | |
3967 | "with invalid wIndex == %d!", wIndex); | |
3968 | } | |
3969 | ||
3970 | OK (0); | |
3971 | case (RH_PORT_SUSPEND): | |
3972 | /* Opposite to suspend should be resume, so we'll do a resume. */ | |
3973 | /* FIXME: USB 1.1, 11.16.2.2 says: | |
3974 | "Clearing the PORT_SUSPEND feature causes a host-initiated resume | |
3975 | on the specified port. If the port is not in the Suspended state, | |
3976 | the hub should treat this request as a functional no-operation." | |
3977 | Shouldn't we check if the port is in a suspended state before | |
3978 | resuming? */ | |
3979 | ||
3980 | /* Make sure the controller isn't busy. */ | |
3981 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
3982 | ||
3983 | if (wIndex == 1) { | |
3984 | *R_USB_COMMAND = | |
3985 | IO_STATE(R_USB_COMMAND, port_sel, port1) | | |
3986 | IO_STATE(R_USB_COMMAND, port_cmd, resume) | | |
3987 | IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); | |
3988 | } else if (wIndex == 2) { | |
3989 | *R_USB_COMMAND = | |
3990 | IO_STATE(R_USB_COMMAND, port_sel, port2) | | |
3991 | IO_STATE(R_USB_COMMAND, port_cmd, resume) | | |
3992 | IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); | |
3993 | } else { | |
3994 | dbg_rh("RH_CLEAR_FEATURE->RH_PORT_SUSPEND " | |
3995 | "with invalid wIndex == %d!", wIndex); | |
3996 | } | |
3997 | ||
3998 | OK (0); | |
3999 | case (RH_PORT_POWER): | |
4000 | OK (0); /* port power ** */ | |
4001 | case (RH_C_PORT_CONNECTION): | |
4002 | if (wIndex == 1) { | |
4003 | hc->rh.wPortChange_1 &= ~(1 << RH_PORT_CONNECTION); | |
4004 | } else if (wIndex == 2) { | |
4005 | hc->rh.wPortChange_2 &= ~(1 << RH_PORT_CONNECTION); | |
4006 | } else { | |
4007 | dbg_rh("RH_CLEAR_FEATURE->RH_C_PORT_CONNECTION " | |
4008 | "with invalid wIndex == %d!", wIndex); | |
4009 | } | |
4010 | ||
4011 | OK (0); | |
4012 | case (RH_C_PORT_ENABLE): | |
4013 | if (wIndex == 1) { | |
4014 | hc->rh.wPortChange_1 &= ~(1 << RH_PORT_ENABLE); | |
4015 | } else if (wIndex == 2) { | |
4016 | hc->rh.wPortChange_2 &= ~(1 << RH_PORT_ENABLE); | |
4017 | } else { | |
4018 | dbg_rh("RH_CLEAR_FEATURE->RH_C_PORT_ENABLE " | |
4019 | "with invalid wIndex == %d!", wIndex); | |
4020 | } | |
4021 | OK (0); | |
4022 | case (RH_C_PORT_SUSPEND): | |
4023 | /*** WR_RH_PORTSTAT(RH_PS_PSSC); */ | |
4024 | OK (0); | |
4025 | case (RH_C_PORT_OVER_CURRENT): | |
4026 | OK (0); /* port power over current ** */ | |
4027 | case (RH_C_PORT_RESET): | |
4028 | if (wIndex == 1) { | |
4029 | hc->rh.wPortChange_1 &= ~(1 << RH_PORT_RESET); | |
4030 | } else if (wIndex == 2) { | |
4031 | hc->rh.wPortChange_2 &= ~(1 << RH_PORT_RESET); | |
4032 | } else { | |
4033 | dbg_rh("RH_CLEAR_FEATURE->RH_C_PORT_RESET " | |
4034 | "with invalid index == %d!", wIndex); | |
4035 | } | |
4036 | ||
4037 | OK (0); | |
4038 | ||
4039 | } | |
4040 | break; | |
4041 | ||
4042 | case RH_SET_FEATURE | RH_OTHER | RH_CLASS: | |
4043 | switch (wValue) { | |
4044 | case (RH_PORT_SUSPEND): | |
4045 | ||
4046 | /* Make sure the controller isn't busy. */ | |
4047 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4048 | ||
4049 | if (wIndex == 1) { | |
4050 | *R_USB_COMMAND = | |
4051 | IO_STATE(R_USB_COMMAND, port_sel, port1) | | |
4052 | IO_STATE(R_USB_COMMAND, port_cmd, suspend) | | |
4053 | IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); | |
4054 | } else if (wIndex == 2) { | |
4055 | *R_USB_COMMAND = | |
4056 | IO_STATE(R_USB_COMMAND, port_sel, port2) | | |
4057 | IO_STATE(R_USB_COMMAND, port_cmd, suspend) | | |
4058 | IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); | |
4059 | } else { | |
4060 | dbg_rh("RH_SET_FEATURE->RH_PORT_SUSPEND " | |
4061 | "with invalid wIndex == %d!", wIndex); | |
4062 | } | |
4063 | ||
4064 | OK (0); | |
4065 | case (RH_PORT_RESET): | |
4066 | if (wIndex == 1) { | |
4067 | ||
4068 | port_1_reset: | |
4069 | dbg_rh("Doing reset of port 1"); | |
4070 | ||
4071 | /* Make sure the controller isn't busy. */ | |
4072 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4073 | ||
4074 | *R_USB_COMMAND = | |
4075 | IO_STATE(R_USB_COMMAND, port_sel, port1) | | |
4076 | IO_STATE(R_USB_COMMAND, port_cmd, reset) | | |
4077 | IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); | |
4078 | ||
4079 | /* We must wait at least 10 ms for the device to recover. | |
4080 | 15 ms should be enough. */ | |
4081 | udelay(15000); | |
4082 | ||
4083 | /* Wait for reset bit to go low (should be done by now). */ | |
4084 | while (hc->rh.prev_wPortStatus_1 & | |
4085 | IO_STATE(R_USB_RH_PORT_STATUS_1, reset, yes)); | |
4086 | ||
4087 | /* If the port status is | |
4088 | 1) connected and enabled then there is a device and everything is fine | |
4089 | 2) neither connected nor enabled then there is no device, also fine | |
4090 | 3) connected and not enabled then we try again | |
4091 | (Yes, there are other port status combinations besides these.) */ | |
4092 | ||
4093 | if ((hc->rh.prev_wPortStatus_1 & | |
4094 | IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes)) && | |
4095 | (hc->rh.prev_wPortStatus_1 & | |
4096 | IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, no))) { | |
4097 | dbg_rh("Connected device on port 1, but port not enabled?" | |
4098 | " Trying reset again."); | |
4099 | goto port_2_reset; | |
4100 | } | |
4101 | ||
4102 | /* Diagnostic printouts. */ | |
4103 | if ((hc->rh.prev_wPortStatus_1 & | |
4104 | IO_STATE(R_USB_RH_PORT_STATUS_1, connected, no)) && | |
4105 | (hc->rh.prev_wPortStatus_1 & | |
4106 | IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, no))) { | |
4107 | dbg_rh("No connected device on port 1"); | |
4108 | } else if ((hc->rh.prev_wPortStatus_1 & | |
4109 | IO_STATE(R_USB_RH_PORT_STATUS_1, connected, yes)) && | |
4110 | (hc->rh.prev_wPortStatus_1 & | |
4111 | IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, yes))) { | |
4112 | dbg_rh("Connected device on port 1, port 1 enabled"); | |
4113 | } | |
4114 | ||
4115 | } else if (wIndex == 2) { | |
4116 | ||
4117 | port_2_reset: | |
4118 | dbg_rh("Doing reset of port 2"); | |
4119 | ||
4120 | /* Make sure the controller isn't busy. */ | |
4121 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4122 | ||
4123 | /* Issue the reset command. */ | |
4124 | *R_USB_COMMAND = | |
4125 | IO_STATE(R_USB_COMMAND, port_sel, port2) | | |
4126 | IO_STATE(R_USB_COMMAND, port_cmd, reset) | | |
4127 | IO_STATE(R_USB_COMMAND, ctrl_cmd, nop); | |
4128 | ||
4129 | /* We must wait at least 10 ms for the device to recover. | |
4130 | 15 ms should be enough. */ | |
4131 | udelay(15000); | |
4132 | ||
4133 | /* Wait for reset bit to go low (should be done by now). */ | |
4134 | while (hc->rh.prev_wPortStatus_2 & | |
4135 | IO_STATE(R_USB_RH_PORT_STATUS_2, reset, yes)); | |
4136 | ||
4137 | /* If the port status is | |
4138 | 1) connected and enabled then there is a device and everything is fine | |
4139 | 2) neither connected nor enabled then there is no device, also fine | |
4140 | 3) connected and not enabled then we try again | |
4141 | (Yes, there are other port status combinations besides these.) */ | |
4142 | ||
4143 | if ((hc->rh.prev_wPortStatus_2 & | |
4144 | IO_STATE(R_USB_RH_PORT_STATUS_2, connected, yes)) && | |
4145 | (hc->rh.prev_wPortStatus_2 & | |
4146 | IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, no))) { | |
4147 | dbg_rh("Connected device on port 2, but port not enabled?" | |
4148 | " Trying reset again."); | |
4149 | goto port_2_reset; | |
4150 | } | |
4151 | ||
4152 | /* Diagnostic printouts. */ | |
4153 | if ((hc->rh.prev_wPortStatus_2 & | |
4154 | IO_STATE(R_USB_RH_PORT_STATUS_2, connected, no)) && | |
4155 | (hc->rh.prev_wPortStatus_2 & | |
4156 | IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, no))) { | |
4157 | dbg_rh("No connected device on port 2"); | |
4158 | } else if ((hc->rh.prev_wPortStatus_2 & | |
4159 | IO_STATE(R_USB_RH_PORT_STATUS_2, connected, yes)) && | |
4160 | (hc->rh.prev_wPortStatus_2 & | |
4161 | IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, yes))) { | |
4162 | dbg_rh("Connected device on port 2, port 2 enabled"); | |
4163 | } | |
4164 | ||
4165 | } else { | |
4166 | dbg_rh("RH_SET_FEATURE->RH_PORT_RESET with invalid wIndex = %d", wIndex); | |
4167 | } | |
4168 | ||
4169 | /* Make sure the controller isn't busy. */ | |
4170 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4171 | ||
4172 | /* If all enabled ports were disabled the host controller goes down into | |
4173 | started mode, so we need to bring it back into the running state. | |
4174 | (This is safe even if it's already in the running state.) */ | |
4175 | *R_USB_COMMAND = | |
4176 | IO_STATE(R_USB_COMMAND, port_sel, nop) | | |
4177 | IO_STATE(R_USB_COMMAND, port_cmd, reset) | | |
4178 | IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run); | |
4179 | ||
4180 | dbg_rh("...Done"); | |
4181 | OK(0); | |
4182 | ||
4183 | case (RH_PORT_POWER): | |
4184 | OK (0); /* port power ** */ | |
4185 | case (RH_PORT_ENABLE): | |
4186 | /* There is no port enable command in the host controller, so if the | |
4187 | port is already enabled, we do nothing. If not, we reset the port | |
4188 | (with an ugly goto). */ | |
4189 | ||
4190 | if (wIndex == 1) { | |
4191 | if (hc->rh.prev_wPortStatus_1 & | |
4192 | IO_STATE(R_USB_RH_PORT_STATUS_1, enabled, no)) { | |
4193 | goto port_1_reset; | |
4194 | } | |
4195 | } else if (wIndex == 2) { | |
4196 | if (hc->rh.prev_wPortStatus_2 & | |
4197 | IO_STATE(R_USB_RH_PORT_STATUS_2, enabled, no)) { | |
4198 | goto port_2_reset; | |
4199 | } | |
4200 | } else { | |
4201 | dbg_rh("RH_SET_FEATURE->RH_GET_STATUS with invalid wIndex = %d", wIndex); | |
4202 | } | |
4203 | OK (0); | |
4204 | } | |
4205 | break; | |
4206 | ||
4207 | case RH_SET_ADDRESS: | |
4208 | hc->rh.devnum = wValue; | |
4209 | dbg_rh("RH address set to: %d", hc->rh.devnum); | |
4210 | OK (0); | |
4211 | ||
4212 | case RH_GET_DESCRIPTOR: | |
4213 | switch ((wValue & 0xff00) >> 8) { | |
4214 | case (0x01): /* device descriptor */ | |
4215 | len = min_t(unsigned int, leni, min_t(unsigned int, sizeof (root_hub_dev_des), wLength)); | |
4216 | memcpy (data, root_hub_dev_des, len); | |
4217 | OK (len); | |
4218 | case (0x02): /* configuration descriptor */ | |
4219 | len = min_t(unsigned int, leni, min_t(unsigned int, sizeof (root_hub_config_des), wLength)); | |
4220 | memcpy (data, root_hub_config_des, len); | |
4221 | OK (len); | |
4222 | case (0x03): /* string descriptors */ | |
4223 | len = usb_root_hub_string (wValue & 0xff, | |
4224 | 0xff, "ETRAX 100LX", | |
4225 | data, wLength); | |
4226 | if (len > 0) { | |
4227 | OK(min(leni, len)); | |
4228 | } else { | |
4229 | stat = -EPIPE; | |
4230 | } | |
4231 | ||
4232 | } | |
4233 | break; | |
4234 | ||
4235 | case RH_GET_DESCRIPTOR | RH_CLASS: | |
4236 | root_hub_hub_des[2] = hc->rh.numports; | |
4237 | len = min_t(unsigned int, leni, min_t(unsigned int, sizeof (root_hub_hub_des), wLength)); | |
4238 | memcpy (data, root_hub_hub_des, len); | |
4239 | OK (len); | |
4240 | ||
4241 | case RH_GET_CONFIGURATION: | |
4242 | *(__u8 *) data = 0x01; | |
4243 | OK (1); | |
4244 | ||
4245 | case RH_SET_CONFIGURATION: | |
4246 | OK (0); | |
4247 | ||
4248 | default: | |
4249 | stat = -EPIPE; | |
4250 | } | |
4251 | ||
4252 | urb->actual_length = len; | |
4253 | urb->status = stat; | |
4254 | urb->dev = NULL; | |
4255 | if (urb->complete) { | |
4256 | urb->complete(urb, NULL); | |
4257 | } | |
4258 | DBFEXIT; | |
4259 | ||
4260 | return 0; | |
4261 | } | |
4262 | ||
4263 | static void | |
4264 | etrax_usb_bulk_eot_timer_func(unsigned long dummy) | |
4265 | { | |
4266 | /* Because of a race condition in the top half, we might miss a bulk eot. | |
4267 | This timer "simulates" a bulk eot if we don't get one for a while, hopefully | |
4268 | correcting the situation. */ | |
4269 | dbg_bulk("bulk_eot_timer timed out."); | |
4270 | etrax_usb_hc_bulk_eot_interrupt(1); | |
4271 | } | |
4272 | ||
4273 | static void* | |
5db539e4 OK |
4274 | etrax_usb_buffer_alloc(struct usb_bus* bus, size_t size, |
4275 | unsigned mem_flags, dma_addr_t *dma) | |
1da177e4 LT |
4276 | { |
4277 | return kmalloc(size, mem_flags); | |
4278 | } | |
4279 | ||
4280 | static void | |
4281 | etrax_usb_buffer_free(struct usb_bus *bus, size_t size, void *addr, dma_addr_t dma) | |
4282 | { | |
4283 | kfree(addr); | |
4284 | } | |
4285 | ||
4286 | ||
4287 | static struct device fake_device; | |
4288 | ||
4289 | static int __init etrax_usb_hc_init(void) | |
4290 | { | |
4291 | static etrax_hc_t *hc; | |
4292 | struct usb_bus *bus; | |
4293 | struct usb_device *usb_rh; | |
4294 | int i; | |
4295 | ||
4296 | DBFENTER; | |
4297 | ||
4298 | info("ETRAX 100LX USB-HCD %s (c) 2001-2003 Axis Communications AB\n", usb_hcd_version); | |
4299 | ||
4300 | hc = kmalloc(sizeof(etrax_hc_t), GFP_KERNEL); | |
4301 | assert(hc != NULL); | |
4302 | ||
4303 | /* We use kmem_cache_* to make sure that all DMA desc. are dword aligned */ | |
4304 | /* Note that we specify sizeof(USB_EP_Desc_t) as the size, but also allocate | |
4305 | SB descriptors from this cache. This is ok since sizeof(USB_EP_Desc_t) == | |
4306 | sizeof(USB_SB_Desc_t). */ | |
4307 | ||
4308 | usb_desc_cache = kmem_cache_create("usb_desc_cache", sizeof(USB_EP_Desc_t), 0, | |
4309 | SLAB_HWCACHE_ALIGN, 0, 0); | |
4310 | assert(usb_desc_cache != NULL); | |
4311 | ||
4312 | top_half_reg_cache = kmem_cache_create("top_half_reg_cache", | |
4313 | sizeof(usb_interrupt_registers_t), | |
4314 | 0, SLAB_HWCACHE_ALIGN, 0, 0); | |
4315 | assert(top_half_reg_cache != NULL); | |
4316 | ||
4317 | isoc_compl_cache = kmem_cache_create("isoc_compl_cache", | |
4318 | sizeof(usb_isoc_complete_data_t), | |
4319 | 0, SLAB_HWCACHE_ALIGN, 0, 0); | |
4320 | assert(isoc_compl_cache != NULL); | |
4321 | ||
4322 | etrax_usb_bus = bus = usb_alloc_bus(&etrax_usb_device_operations); | |
4323 | hc->bus = bus; | |
4324 | bus->bus_name="ETRAX 100LX"; | |
4325 | bus->hcpriv = hc; | |
4326 | ||
093cf723 | 4327 | /* Initialize RH to the default address. |
1da177e4 LT |
4328 | And make sure that we have no status change indication */ |
4329 | hc->rh.numports = 2; /* The RH has two ports */ | |
4330 | hc->rh.devnum = 1; | |
4331 | hc->rh.wPortChange_1 = 0; | |
4332 | hc->rh.wPortChange_2 = 0; | |
4333 | ||
4334 | /* Also initate the previous values to zero */ | |
4335 | hc->rh.prev_wPortStatus_1 = 0; | |
4336 | hc->rh.prev_wPortStatus_2 = 0; | |
4337 | ||
4338 | /* Initialize the intr-traffic flags */ | |
4339 | /* FIXME: This isn't used. (Besides, the error field isn't initialized.) */ | |
4340 | hc->intr.sleeping = 0; | |
4341 | hc->intr.wq = NULL; | |
4342 | ||
4343 | epid_usage_bitmask = 0; | |
4344 | epid_out_traffic = 0; | |
4345 | ||
4346 | /* Mark the invalid epid as being used. */ | |
4347 | set_bit(INVALID_EPID, (void *)&epid_usage_bitmask); | |
4348 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, INVALID_EPID); | |
4349 | nop(); | |
4350 | /* The valid bit should still be set ('invalid' is in our world; not the hardware's). */ | |
4351 | *R_USB_EPT_DATA = (IO_STATE(R_USB_EPT_DATA, valid, yes) | | |
4352 | IO_FIELD(R_USB_EPT_DATA, max_len, 1)); | |
4353 | ||
4354 | /* Mark the dummy epid as being used. */ | |
4355 | set_bit(DUMMY_EPID, (void *)&epid_usage_bitmask); | |
4356 | *R_USB_EPT_INDEX = IO_FIELD(R_USB_EPT_INDEX, value, DUMMY_EPID); | |
4357 | nop(); | |
4358 | *R_USB_EPT_DATA = (IO_STATE(R_USB_EPT_DATA, valid, no) | | |
4359 | IO_FIELD(R_USB_EPT_DATA, max_len, 1)); | |
4360 | ||
4361 | /* Initialize the urb list by initiating a head for each list. */ | |
4362 | for (i = 0; i < NBR_OF_EPIDS; i++) { | |
4363 | INIT_LIST_HEAD(&urb_list[i]); | |
4364 | } | |
4365 | spin_lock_init(&urb_list_lock); | |
4366 | ||
4367 | INIT_LIST_HEAD(&urb_unlink_list); | |
4368 | ||
4369 | ||
4370 | /* Initiate the bulk start timer. */ | |
4371 | init_timer(&bulk_start_timer); | |
4372 | bulk_start_timer.expires = jiffies + BULK_START_TIMER_INTERVAL; | |
4373 | bulk_start_timer.function = etrax_usb_bulk_start_timer_func; | |
4374 | add_timer(&bulk_start_timer); | |
4375 | ||
4376 | ||
4377 | /* Initiate the bulk eot timer. */ | |
4378 | init_timer(&bulk_eot_timer); | |
4379 | bulk_eot_timer.expires = jiffies + BULK_EOT_TIMER_INTERVAL; | |
4380 | bulk_eot_timer.function = etrax_usb_bulk_eot_timer_func; | |
4381 | add_timer(&bulk_eot_timer); | |
4382 | ||
4383 | /* Set up the data structures for USB traffic. Note that this must be done before | |
4384 | any interrupt that relies on sane DMA list occurrs. */ | |
4385 | init_rx_buffers(); | |
4386 | init_tx_bulk_ep(); | |
4387 | init_tx_ctrl_ep(); | |
4388 | init_tx_intr_ep(); | |
4389 | init_tx_isoc_ep(); | |
4390 | ||
4391 | device_initialize(&fake_device); | |
4392 | kobject_set_name(&fake_device.kobj, "etrax_usb"); | |
4393 | kobject_add(&fake_device.kobj); | |
312c004d | 4394 | kobject_uevent(&fake_device.kobj, KOBJ_ADD); |
1da177e4 LT |
4395 | hc->bus->controller = &fake_device; |
4396 | usb_register_bus(hc->bus); | |
4397 | ||
4398 | *R_IRQ_MASK2_SET = | |
4399 | /* Note that these interrupts are not used. */ | |
4400 | IO_STATE(R_IRQ_MASK2_SET, dma8_sub0_descr, set) | | |
4401 | /* Sub channel 1 (ctrl) descr. interrupts are used. */ | |
4402 | IO_STATE(R_IRQ_MASK2_SET, dma8_sub1_descr, set) | | |
4403 | IO_STATE(R_IRQ_MASK2_SET, dma8_sub2_descr, set) | | |
4404 | /* Sub channel 3 (isoc) descr. interrupts are used. */ | |
4405 | IO_STATE(R_IRQ_MASK2_SET, dma8_sub3_descr, set); | |
4406 | ||
4407 | /* Note that the dma9_descr interrupt is not used. */ | |
4408 | *R_IRQ_MASK2_SET = | |
4409 | IO_STATE(R_IRQ_MASK2_SET, dma9_eop, set) | | |
4410 | IO_STATE(R_IRQ_MASK2_SET, dma9_descr, set); | |
4411 | ||
4412 | /* FIXME: Enable iso_eof only when isoc traffic is running. */ | |
4413 | *R_USB_IRQ_MASK_SET = | |
4414 | IO_STATE(R_USB_IRQ_MASK_SET, iso_eof, set) | | |
4415 | IO_STATE(R_USB_IRQ_MASK_SET, bulk_eot, set) | | |
4416 | IO_STATE(R_USB_IRQ_MASK_SET, epid_attn, set) | | |
4417 | IO_STATE(R_USB_IRQ_MASK_SET, port_status, set) | | |
4418 | IO_STATE(R_USB_IRQ_MASK_SET, ctl_status, set); | |
4419 | ||
4420 | ||
4421 | if (request_irq(ETRAX_USB_HC_IRQ, etrax_usb_hc_interrupt_top_half, 0, | |
4422 | "ETRAX 100LX built-in USB (HC)", hc)) { | |
4423 | err("Could not allocate IRQ %d for USB", ETRAX_USB_HC_IRQ); | |
4424 | etrax_usb_hc_cleanup(); | |
4425 | DBFEXIT; | |
4426 | return -1; | |
4427 | } | |
4428 | ||
4429 | if (request_irq(ETRAX_USB_RX_IRQ, etrax_usb_rx_interrupt, 0, | |
4430 | "ETRAX 100LX built-in USB (Rx)", hc)) { | |
4431 | err("Could not allocate IRQ %d for USB", ETRAX_USB_RX_IRQ); | |
4432 | etrax_usb_hc_cleanup(); | |
4433 | DBFEXIT; | |
4434 | return -1; | |
4435 | } | |
4436 | ||
4437 | if (request_irq(ETRAX_USB_TX_IRQ, etrax_usb_tx_interrupt, 0, | |
4438 | "ETRAX 100LX built-in USB (Tx)", hc)) { | |
4439 | err("Could not allocate IRQ %d for USB", ETRAX_USB_TX_IRQ); | |
4440 | etrax_usb_hc_cleanup(); | |
4441 | DBFEXIT; | |
4442 | return -1; | |
4443 | } | |
4444 | ||
4445 | /* R_USB_COMMAND: | |
4446 | USB commands in host mode. The fields in this register should all be | |
4447 | written to in one write. Do not read-modify-write one field at a time. A | |
4448 | write to this register will trigger events in the USB controller and an | |
4449 | incomplete command may lead to unpredictable results, and in worst case | |
4450 | even to a deadlock in the controller. | |
4451 | (Note however that the busy field is read-only, so no need to write to it.) */ | |
4452 | ||
4453 | /* Check the busy bit before writing to R_USB_COMMAND. */ | |
4454 | ||
4455 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4456 | ||
4457 | /* Reset the USB interface. */ | |
4458 | *R_USB_COMMAND = | |
4459 | IO_STATE(R_USB_COMMAND, port_sel, nop) | | |
4460 | IO_STATE(R_USB_COMMAND, port_cmd, reset) | | |
4461 | IO_STATE(R_USB_COMMAND, ctrl_cmd, reset); | |
4462 | ||
4463 | /* Designer's Reference, p. 8 - 10 says we should Initate R_USB_FM_PSTART to 0x2A30 (10800), | |
4464 | to guarantee that control traffic gets 10% of the bandwidth, and periodic transfer may | |
4465 | allocate the rest (90%). This doesn't work though. Read on for a lenghty explanation. | |
4466 | ||
4467 | While there is a difference between rev. 2 and rev. 3 of the ETRAX 100LX regarding the NAK | |
4468 | behaviour, it doesn't solve this problem. What happens is that a control transfer will not | |
4469 | be interrupted in its data stage when PSTART happens (the point at which periodic traffic | |
4470 | is started). Thus, if PSTART is set to 10800 and its IN or OUT token is NAKed until just before | |
4471 | PSTART happens, it will continue the IN/OUT transfer as long as it's ACKed. After it's done, | |
4472 | there may be too little time left for an isochronous transfer, causing an epid attention | |
4473 | interrupt due to perror. The work-around for this is to let the control transfers run at the | |
4474 | end of the frame instead of at the beginning, and will be interrupted just fine if it doesn't | |
4475 | fit into the frame. However, since there will *always* be a control transfer at the beginning | |
4476 | of the frame, regardless of what we set PSTART to, that transfer might be a 64-byte transfer | |
4477 | which consumes up to 15% of the frame, leaving only 85% for periodic traffic. The solution to | |
4478 | this would be to 'dummy allocate' 5% of the frame with the usb_claim_bandwidth function to make | |
4479 | sure that the periodic transfers that are inserted will always fit in the frame. | |
4480 | ||
4481 | The idea was suggested that a control transfer could be split up into several 8 byte transfers, | |
4482 | so that it would be interrupted by PSTART, but since this can't be done for an IN transfer this | |
4483 | hasn't been implemented. | |
4484 | ||
4485 | The value 11960 is chosen to be just after the SOF token, with a couple of bit times extra | |
4486 | for possible bit stuffing. */ | |
4487 | ||
4488 | *R_USB_FM_PSTART = IO_FIELD(R_USB_FM_PSTART, value, 11960); | |
4489 | ||
4490 | #ifdef CONFIG_ETRAX_USB_HOST_PORT1 | |
4491 | *R_USB_PORT1_DISABLE = IO_STATE(R_USB_PORT1_DISABLE, disable, no); | |
4492 | #endif | |
4493 | ||
4494 | #ifdef CONFIG_ETRAX_USB_HOST_PORT2 | |
4495 | *R_USB_PORT2_DISABLE = IO_STATE(R_USB_PORT2_DISABLE, disable, no); | |
4496 | #endif | |
4497 | ||
4498 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4499 | ||
4500 | /* Configure the USB interface as a host controller. */ | |
4501 | *R_USB_COMMAND = | |
4502 | IO_STATE(R_USB_COMMAND, port_sel, nop) | | |
4503 | IO_STATE(R_USB_COMMAND, port_cmd, reset) | | |
4504 | IO_STATE(R_USB_COMMAND, ctrl_cmd, host_config); | |
4505 | ||
4506 | /* Note: Do not reset any ports here. Await the port status interrupts, to have a controlled | |
4507 | sequence of resetting the ports. If we reset both ports now, and there are devices | |
4508 | on both ports, we will get a bus error because both devices will answer the set address | |
4509 | request. */ | |
4510 | ||
4511 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4512 | ||
4513 | /* Start processing of USB traffic. */ | |
4514 | *R_USB_COMMAND = | |
4515 | IO_STATE(R_USB_COMMAND, port_sel, nop) | | |
4516 | IO_STATE(R_USB_COMMAND, port_cmd, reset) | | |
4517 | IO_STATE(R_USB_COMMAND, ctrl_cmd, host_run); | |
4518 | ||
4519 | while (*R_USB_COMMAND & IO_MASK(R_USB_COMMAND, busy)); | |
4520 | ||
4521 | usb_rh = usb_alloc_dev(NULL, hc->bus, 0); | |
4522 | hc->bus->root_hub = usb_rh; | |
4523 | usb_rh->state = USB_STATE_ADDRESS; | |
4524 | usb_rh->speed = USB_SPEED_FULL; | |
4525 | usb_rh->devnum = 1; | |
4526 | hc->bus->devnum_next = 2; | |
4527 | usb_rh->ep0.desc.wMaxPacketSize = __const_cpu_to_le16(64); | |
4528 | usb_get_device_descriptor(usb_rh, USB_DT_DEVICE_SIZE); | |
4529 | usb_new_device(usb_rh); | |
4530 | ||
4531 | DBFEXIT; | |
4532 | ||
4533 | return 0; | |
4534 | } | |
4535 | ||
4536 | static void etrax_usb_hc_cleanup(void) | |
4537 | { | |
4538 | DBFENTER; | |
4539 | ||
4540 | free_irq(ETRAX_USB_HC_IRQ, NULL); | |
4541 | free_irq(ETRAX_USB_RX_IRQ, NULL); | |
4542 | free_irq(ETRAX_USB_TX_IRQ, NULL); | |
4543 | ||
4544 | usb_deregister_bus(etrax_usb_bus); | |
4545 | ||
4546 | /* FIXME: call kmem_cache_destroy here? */ | |
4547 | ||
4548 | DBFEXIT; | |
4549 | } | |
4550 | ||
4551 | module_init(etrax_usb_hc_init); | |
4552 | module_exit(etrax_usb_hc_cleanup); |