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5b7d70c6 BD |
1 | /* linux/drivers/usb/gadget/s3c-hsotg.c |
2 | * | |
3 | * Copyright 2008 Openmoko, Inc. | |
4 | * Copyright 2008 Simtec Electronics | |
5 | * Ben Dooks <ben@simtec.co.uk> | |
6 | * http://armlinux.simtec.co.uk/ | |
7 | * | |
8 | * S3C USB2.0 High-speed / OtG driver | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/spinlock.h> | |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/dma-mapping.h> | |
21 | #include <linux/debugfs.h> | |
22 | #include <linux/seq_file.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/io.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
e50bf385 | 26 | #include <linux/clk.h> |
5b7d70c6 BD |
27 | |
28 | #include <linux/usb/ch9.h> | |
29 | #include <linux/usb/gadget.h> | |
30 | ||
31 | #include <mach/map.h> | |
32 | ||
33 | #include <plat/regs-usb-hsotg-phy.h> | |
34 | #include <plat/regs-usb-hsotg.h> | |
f9fed7cd | 35 | #include <mach/regs-sys.h> |
5b7d70c6 | 36 | #include <plat/udc-hs.h> |
4d47166c | 37 | #include <plat/cpu.h> |
5b7d70c6 BD |
38 | |
39 | #define DMA_ADDR_INVALID (~((dma_addr_t)0)) | |
40 | ||
41 | /* EP0_MPS_LIMIT | |
42 | * | |
43 | * Unfortunately there seems to be a limit of the amount of data that can | |
25985edc LDM |
44 | * be transferred by IN transactions on EP0. This is either 127 bytes or 3 |
45 | * packets (which practically means 1 packet and 63 bytes of data) when the | |
5b7d70c6 BD |
46 | * MPS is set to 64. |
47 | * | |
48 | * This means if we are wanting to move >127 bytes of data, we need to | |
49 | * split the transactions up, but just doing one packet at a time does | |
50 | * not work (this may be an implicit DATA0 PID on first packet of the | |
51 | * transaction) and doing 2 packets is outside the controller's limits. | |
52 | * | |
53 | * If we try to lower the MPS size for EP0, then no transfers work properly | |
54 | * for EP0, and the system will fail basic enumeration. As no cause for this | |
55 | * has currently been found, we cannot support any large IN transfers for | |
56 | * EP0. | |
57 | */ | |
58 | #define EP0_MPS_LIMIT 64 | |
59 | ||
60 | struct s3c_hsotg; | |
61 | struct s3c_hsotg_req; | |
62 | ||
63 | /** | |
64 | * struct s3c_hsotg_ep - driver endpoint definition. | |
65 | * @ep: The gadget layer representation of the endpoint. | |
66 | * @name: The driver generated name for the endpoint. | |
67 | * @queue: Queue of requests for this endpoint. | |
68 | * @parent: Reference back to the parent device structure. | |
69 | * @req: The current request that the endpoint is processing. This is | |
70 | * used to indicate an request has been loaded onto the endpoint | |
71 | * and has yet to be completed (maybe due to data move, or simply | |
72 | * awaiting an ack from the core all the data has been completed). | |
73 | * @debugfs: File entry for debugfs file for this endpoint. | |
74 | * @lock: State lock to protect contents of endpoint. | |
75 | * @dir_in: Set to true if this endpoint is of the IN direction, which | |
76 | * means that it is sending data to the Host. | |
77 | * @index: The index for the endpoint registers. | |
78 | * @name: The name array passed to the USB core. | |
79 | * @halted: Set if the endpoint has been halted. | |
80 | * @periodic: Set if this is a periodic ep, such as Interrupt | |
81 | * @sent_zlp: Set if we've sent a zero-length packet. | |
82 | * @total_data: The total number of data bytes done. | |
83 | * @fifo_size: The size of the FIFO (for periodic IN endpoints) | |
84 | * @fifo_load: The amount of data loaded into the FIFO (periodic IN) | |
85 | * @last_load: The offset of data for the last start of request. | |
86 | * @size_loaded: The last loaded size for DxEPTSIZE for periodic IN | |
87 | * | |
88 | * This is the driver's state for each registered enpoint, allowing it | |
89 | * to keep track of transactions that need doing. Each endpoint has a | |
90 | * lock to protect the state, to try and avoid using an overall lock | |
91 | * for the host controller as much as possible. | |
92 | * | |
93 | * For periodic IN endpoints, we have fifo_size and fifo_load to try | |
94 | * and keep track of the amount of data in the periodic FIFO for each | |
95 | * of these as we don't have a status register that tells us how much | |
e7a9ff54 BD |
96 | * is in each of them. (note, this may actually be useless information |
97 | * as in shared-fifo mode periodic in acts like a single-frame packet | |
98 | * buffer than a fifo) | |
5b7d70c6 BD |
99 | */ |
100 | struct s3c_hsotg_ep { | |
101 | struct usb_ep ep; | |
102 | struct list_head queue; | |
103 | struct s3c_hsotg *parent; | |
104 | struct s3c_hsotg_req *req; | |
105 | struct dentry *debugfs; | |
106 | ||
107 | spinlock_t lock; | |
108 | ||
109 | unsigned long total_data; | |
110 | unsigned int size_loaded; | |
111 | unsigned int last_load; | |
112 | unsigned int fifo_load; | |
113 | unsigned short fifo_size; | |
114 | ||
115 | unsigned char dir_in; | |
116 | unsigned char index; | |
117 | ||
118 | unsigned int halted:1; | |
119 | unsigned int periodic:1; | |
120 | unsigned int sent_zlp:1; | |
121 | ||
122 | char name[10]; | |
123 | }; | |
124 | ||
125 | #define S3C_HSOTG_EPS (8+1) /* limit to 9 for the moment */ | |
126 | ||
127 | /** | |
128 | * struct s3c_hsotg - driver state. | |
129 | * @dev: The parent device supplied to the probe function | |
130 | * @driver: USB gadget driver | |
131 | * @plat: The platform specific configuration data. | |
132 | * @regs: The memory area mapped for accessing registers. | |
133 | * @regs_res: The resource that was allocated when claiming register space. | |
134 | * @irq: The IRQ number we are using | |
10aebc77 | 135 | * @dedicated_fifos: Set if the hardware has dedicated IN-EP fifos. |
5b7d70c6 BD |
136 | * @debug_root: root directrory for debugfs. |
137 | * @debug_file: main status file for debugfs. | |
138 | * @debug_fifo: FIFO status file for debugfs. | |
139 | * @ep0_reply: Request used for ep0 reply. | |
140 | * @ep0_buff: Buffer for EP0 reply data, if needed. | |
141 | * @ctrl_buff: Buffer for EP0 control requests. | |
142 | * @ctrl_req: Request for EP0 control packets. | |
143 | * @eps: The endpoints being supplied to the gadget framework | |
144 | */ | |
145 | struct s3c_hsotg { | |
146 | struct device *dev; | |
147 | struct usb_gadget_driver *driver; | |
148 | struct s3c_hsotg_plat *plat; | |
149 | ||
150 | void __iomem *regs; | |
151 | struct resource *regs_res; | |
152 | int irq; | |
31ee04de | 153 | struct clk *clk; |
5b7d70c6 | 154 | |
10aebc77 BD |
155 | unsigned int dedicated_fifos:1; |
156 | ||
5b7d70c6 BD |
157 | struct dentry *debug_root; |
158 | struct dentry *debug_file; | |
159 | struct dentry *debug_fifo; | |
160 | ||
161 | struct usb_request *ep0_reply; | |
162 | struct usb_request *ctrl_req; | |
163 | u8 ep0_buff[8]; | |
164 | u8 ctrl_buff[8]; | |
165 | ||
166 | struct usb_gadget gadget; | |
167 | struct s3c_hsotg_ep eps[]; | |
168 | }; | |
169 | ||
170 | /** | |
171 | * struct s3c_hsotg_req - data transfer request | |
172 | * @req: The USB gadget request | |
173 | * @queue: The list of requests for the endpoint this is queued for. | |
174 | * @in_progress: Has already had size/packets written to core | |
175 | * @mapped: DMA buffer for this request has been mapped via dma_map_single(). | |
176 | */ | |
177 | struct s3c_hsotg_req { | |
178 | struct usb_request req; | |
179 | struct list_head queue; | |
180 | unsigned char in_progress; | |
181 | unsigned char mapped; | |
182 | }; | |
183 | ||
184 | /* conversion functions */ | |
185 | static inline struct s3c_hsotg_req *our_req(struct usb_request *req) | |
186 | { | |
187 | return container_of(req, struct s3c_hsotg_req, req); | |
188 | } | |
189 | ||
190 | static inline struct s3c_hsotg_ep *our_ep(struct usb_ep *ep) | |
191 | { | |
192 | return container_of(ep, struct s3c_hsotg_ep, ep); | |
193 | } | |
194 | ||
195 | static inline struct s3c_hsotg *to_hsotg(struct usb_gadget *gadget) | |
196 | { | |
197 | return container_of(gadget, struct s3c_hsotg, gadget); | |
198 | } | |
199 | ||
200 | static inline void __orr32(void __iomem *ptr, u32 val) | |
201 | { | |
202 | writel(readl(ptr) | val, ptr); | |
203 | } | |
204 | ||
205 | static inline void __bic32(void __iomem *ptr, u32 val) | |
206 | { | |
207 | writel(readl(ptr) & ~val, ptr); | |
208 | } | |
209 | ||
210 | /* forward decleration of functions */ | |
211 | static void s3c_hsotg_dump(struct s3c_hsotg *hsotg); | |
212 | ||
213 | /** | |
214 | * using_dma - return the DMA status of the driver. | |
215 | * @hsotg: The driver state. | |
216 | * | |
217 | * Return true if we're using DMA. | |
218 | * | |
219 | * Currently, we have the DMA support code worked into everywhere | |
220 | * that needs it, but the AMBA DMA implementation in the hardware can | |
221 | * only DMA from 32bit aligned addresses. This means that gadgets such | |
222 | * as the CDC Ethernet cannot work as they often pass packets which are | |
223 | * not 32bit aligned. | |
224 | * | |
225 | * Unfortunately the choice to use DMA or not is global to the controller | |
226 | * and seems to be only settable when the controller is being put through | |
227 | * a core reset. This means we either need to fix the gadgets to take | |
228 | * account of DMA alignment, or add bounce buffers (yuerk). | |
229 | * | |
230 | * Until this issue is sorted out, we always return 'false'. | |
231 | */ | |
232 | static inline bool using_dma(struct s3c_hsotg *hsotg) | |
233 | { | |
234 | return false; /* support is not complete */ | |
235 | } | |
236 | ||
237 | /** | |
238 | * s3c_hsotg_en_gsint - enable one or more of the general interrupt | |
239 | * @hsotg: The device state | |
240 | * @ints: A bitmask of the interrupts to enable | |
241 | */ | |
242 | static void s3c_hsotg_en_gsint(struct s3c_hsotg *hsotg, u32 ints) | |
243 | { | |
244 | u32 gsintmsk = readl(hsotg->regs + S3C_GINTMSK); | |
245 | u32 new_gsintmsk; | |
246 | ||
247 | new_gsintmsk = gsintmsk | ints; | |
248 | ||
249 | if (new_gsintmsk != gsintmsk) { | |
250 | dev_dbg(hsotg->dev, "gsintmsk now 0x%08x\n", new_gsintmsk); | |
251 | writel(new_gsintmsk, hsotg->regs + S3C_GINTMSK); | |
252 | } | |
253 | } | |
254 | ||
255 | /** | |
256 | * s3c_hsotg_disable_gsint - disable one or more of the general interrupt | |
257 | * @hsotg: The device state | |
258 | * @ints: A bitmask of the interrupts to enable | |
259 | */ | |
260 | static void s3c_hsotg_disable_gsint(struct s3c_hsotg *hsotg, u32 ints) | |
261 | { | |
262 | u32 gsintmsk = readl(hsotg->regs + S3C_GINTMSK); | |
263 | u32 new_gsintmsk; | |
264 | ||
265 | new_gsintmsk = gsintmsk & ~ints; | |
266 | ||
267 | if (new_gsintmsk != gsintmsk) | |
268 | writel(new_gsintmsk, hsotg->regs + S3C_GINTMSK); | |
269 | } | |
270 | ||
271 | /** | |
272 | * s3c_hsotg_ctrl_epint - enable/disable an endpoint irq | |
273 | * @hsotg: The device state | |
274 | * @ep: The endpoint index | |
275 | * @dir_in: True if direction is in. | |
276 | * @en: The enable value, true to enable | |
277 | * | |
278 | * Set or clear the mask for an individual endpoint's interrupt | |
279 | * request. | |
280 | */ | |
281 | static void s3c_hsotg_ctrl_epint(struct s3c_hsotg *hsotg, | |
282 | unsigned int ep, unsigned int dir_in, | |
283 | unsigned int en) | |
284 | { | |
285 | unsigned long flags; | |
286 | u32 bit = 1 << ep; | |
287 | u32 daint; | |
288 | ||
289 | if (!dir_in) | |
290 | bit <<= 16; | |
291 | ||
292 | local_irq_save(flags); | |
293 | daint = readl(hsotg->regs + S3C_DAINTMSK); | |
294 | if (en) | |
295 | daint |= bit; | |
296 | else | |
297 | daint &= ~bit; | |
298 | writel(daint, hsotg->regs + S3C_DAINTMSK); | |
299 | local_irq_restore(flags); | |
300 | } | |
301 | ||
302 | /** | |
303 | * s3c_hsotg_init_fifo - initialise non-periodic FIFOs | |
304 | * @hsotg: The device instance. | |
305 | */ | |
306 | static void s3c_hsotg_init_fifo(struct s3c_hsotg *hsotg) | |
307 | { | |
0f002d20 BD |
308 | unsigned int ep; |
309 | unsigned int addr; | |
310 | unsigned int size; | |
1703a6d3 | 311 | int timeout; |
0f002d20 BD |
312 | u32 val; |
313 | ||
5b7d70c6 BD |
314 | /* the ryu 2.6.24 release ahs |
315 | writel(0x1C0, hsotg->regs + S3C_GRXFSIZ); | |
316 | writel(S3C_GNPTXFSIZ_NPTxFStAddr(0x200) | | |
317 | S3C_GNPTXFSIZ_NPTxFDep(0x1C0), | |
318 | hsotg->regs + S3C_GNPTXFSIZ); | |
319 | */ | |
320 | ||
6d091ee7 | 321 | /* set FIFO sizes to 2048/1024 */ |
5b7d70c6 BD |
322 | |
323 | writel(2048, hsotg->regs + S3C_GRXFSIZ); | |
324 | writel(S3C_GNPTXFSIZ_NPTxFStAddr(2048) | | |
6d091ee7 | 325 | S3C_GNPTXFSIZ_NPTxFDep(1024), |
5b7d70c6 | 326 | hsotg->regs + S3C_GNPTXFSIZ); |
0f002d20 BD |
327 | |
328 | /* arange all the rest of the TX FIFOs, as some versions of this | |
329 | * block have overlapping default addresses. This also ensures | |
330 | * that if the settings have been changed, then they are set to | |
331 | * known values. */ | |
332 | ||
333 | /* start at the end of the GNPTXFSIZ, rounded up */ | |
334 | addr = 2048 + 1024; | |
335 | size = 768; | |
336 | ||
337 | /* currently we allocate TX FIFOs for all possible endpoints, | |
338 | * and assume that they are all the same size. */ | |
339 | ||
340 | for (ep = 0; ep <= 15; ep++) { | |
341 | val = addr; | |
342 | val |= size << S3C_DPTXFSIZn_DPTxFSize_SHIFT; | |
343 | addr += size; | |
344 | ||
345 | writel(val, hsotg->regs + S3C_DPTXFSIZn(ep)); | |
346 | } | |
1703a6d3 BD |
347 | |
348 | /* according to p428 of the design guide, we need to ensure that | |
349 | * all fifos are flushed before continuing */ | |
350 | ||
351 | writel(S3C_GRSTCTL_TxFNum(0x10) | S3C_GRSTCTL_TxFFlsh | | |
352 | S3C_GRSTCTL_RxFFlsh, hsotg->regs + S3C_GRSTCTL); | |
353 | ||
354 | /* wait until the fifos are both flushed */ | |
355 | timeout = 100; | |
356 | while (1) { | |
357 | val = readl(hsotg->regs + S3C_GRSTCTL); | |
358 | ||
359 | if ((val & (S3C_GRSTCTL_TxFFlsh | S3C_GRSTCTL_RxFFlsh)) == 0) | |
360 | break; | |
361 | ||
362 | if (--timeout == 0) { | |
363 | dev_err(hsotg->dev, | |
364 | "%s: timeout flushing fifos (GRSTCTL=%08x)\n", | |
365 | __func__, val); | |
366 | } | |
367 | ||
368 | udelay(1); | |
369 | } | |
370 | ||
371 | dev_dbg(hsotg->dev, "FIFOs reset, timeout at %d\n", timeout); | |
5b7d70c6 BD |
372 | } |
373 | ||
374 | /** | |
375 | * @ep: USB endpoint to allocate request for. | |
376 | * @flags: Allocation flags | |
377 | * | |
378 | * Allocate a new USB request structure appropriate for the specified endpoint | |
379 | */ | |
0978f8c5 MB |
380 | static struct usb_request *s3c_hsotg_ep_alloc_request(struct usb_ep *ep, |
381 | gfp_t flags) | |
5b7d70c6 BD |
382 | { |
383 | struct s3c_hsotg_req *req; | |
384 | ||
385 | req = kzalloc(sizeof(struct s3c_hsotg_req), flags); | |
386 | if (!req) | |
387 | return NULL; | |
388 | ||
389 | INIT_LIST_HEAD(&req->queue); | |
390 | ||
391 | req->req.dma = DMA_ADDR_INVALID; | |
392 | return &req->req; | |
393 | } | |
394 | ||
395 | /** | |
396 | * is_ep_periodic - return true if the endpoint is in periodic mode. | |
397 | * @hs_ep: The endpoint to query. | |
398 | * | |
399 | * Returns true if the endpoint is in periodic mode, meaning it is being | |
400 | * used for an Interrupt or ISO transfer. | |
401 | */ | |
402 | static inline int is_ep_periodic(struct s3c_hsotg_ep *hs_ep) | |
403 | { | |
404 | return hs_ep->periodic; | |
405 | } | |
406 | ||
407 | /** | |
408 | * s3c_hsotg_unmap_dma - unmap the DMA memory being used for the request | |
409 | * @hsotg: The device state. | |
410 | * @hs_ep: The endpoint for the request | |
411 | * @hs_req: The request being processed. | |
412 | * | |
413 | * This is the reverse of s3c_hsotg_map_dma(), called for the completion | |
414 | * of a request to ensure the buffer is ready for access by the caller. | |
415 | */ | |
416 | static void s3c_hsotg_unmap_dma(struct s3c_hsotg *hsotg, | |
417 | struct s3c_hsotg_ep *hs_ep, | |
418 | struct s3c_hsotg_req *hs_req) | |
419 | { | |
420 | struct usb_request *req = &hs_req->req; | |
421 | enum dma_data_direction dir; | |
422 | ||
423 | dir = hs_ep->dir_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE; | |
424 | ||
425 | /* ignore this if we're not moving any data */ | |
426 | if (hs_req->req.length == 0) | |
427 | return; | |
428 | ||
429 | if (hs_req->mapped) { | |
430 | /* we mapped this, so unmap and remove the dma */ | |
431 | ||
432 | dma_unmap_single(hsotg->dev, req->dma, req->length, dir); | |
433 | ||
434 | req->dma = DMA_ADDR_INVALID; | |
435 | hs_req->mapped = 0; | |
436 | } else { | |
5b520259 | 437 | dma_sync_single_for_cpu(hsotg->dev, req->dma, req->length, dir); |
5b7d70c6 BD |
438 | } |
439 | } | |
440 | ||
441 | /** | |
442 | * s3c_hsotg_write_fifo - write packet Data to the TxFIFO | |
443 | * @hsotg: The controller state. | |
444 | * @hs_ep: The endpoint we're going to write for. | |
445 | * @hs_req: The request to write data for. | |
446 | * | |
447 | * This is called when the TxFIFO has some space in it to hold a new | |
448 | * transmission and we have something to give it. The actual setup of | |
449 | * the data size is done elsewhere, so all we have to do is to actually | |
450 | * write the data. | |
451 | * | |
452 | * The return value is zero if there is more space (or nothing was done) | |
453 | * otherwise -ENOSPC is returned if the FIFO space was used up. | |
454 | * | |
455 | * This routine is only needed for PIO | |
456 | */ | |
457 | static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg, | |
458 | struct s3c_hsotg_ep *hs_ep, | |
459 | struct s3c_hsotg_req *hs_req) | |
460 | { | |
461 | bool periodic = is_ep_periodic(hs_ep); | |
462 | u32 gnptxsts = readl(hsotg->regs + S3C_GNPTXSTS); | |
463 | int buf_pos = hs_req->req.actual; | |
464 | int to_write = hs_ep->size_loaded; | |
465 | void *data; | |
466 | int can_write; | |
467 | int pkt_round; | |
468 | ||
469 | to_write -= (buf_pos - hs_ep->last_load); | |
470 | ||
471 | /* if there's nothing to write, get out early */ | |
472 | if (to_write == 0) | |
473 | return 0; | |
474 | ||
10aebc77 | 475 | if (periodic && !hsotg->dedicated_fifos) { |
5b7d70c6 BD |
476 | u32 epsize = readl(hsotg->regs + S3C_DIEPTSIZ(hs_ep->index)); |
477 | int size_left; | |
478 | int size_done; | |
479 | ||
480 | /* work out how much data was loaded so we can calculate | |
481 | * how much data is left in the fifo. */ | |
482 | ||
483 | size_left = S3C_DxEPTSIZ_XferSize_GET(epsize); | |
484 | ||
e7a9ff54 BD |
485 | /* if shared fifo, we cannot write anything until the |
486 | * previous data has been completely sent. | |
487 | */ | |
488 | if (hs_ep->fifo_load != 0) { | |
489 | s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_PTxFEmp); | |
490 | return -ENOSPC; | |
491 | } | |
492 | ||
5b7d70c6 BD |
493 | dev_dbg(hsotg->dev, "%s: left=%d, load=%d, fifo=%d, size %d\n", |
494 | __func__, size_left, | |
495 | hs_ep->size_loaded, hs_ep->fifo_load, hs_ep->fifo_size); | |
496 | ||
497 | /* how much of the data has moved */ | |
498 | size_done = hs_ep->size_loaded - size_left; | |
499 | ||
500 | /* how much data is left in the fifo */ | |
501 | can_write = hs_ep->fifo_load - size_done; | |
502 | dev_dbg(hsotg->dev, "%s: => can_write1=%d\n", | |
503 | __func__, can_write); | |
504 | ||
505 | can_write = hs_ep->fifo_size - can_write; | |
506 | dev_dbg(hsotg->dev, "%s: => can_write2=%d\n", | |
507 | __func__, can_write); | |
508 | ||
509 | if (can_write <= 0) { | |
510 | s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_PTxFEmp); | |
511 | return -ENOSPC; | |
512 | } | |
10aebc77 BD |
513 | } else if (hsotg->dedicated_fifos && hs_ep->index != 0) { |
514 | can_write = readl(hsotg->regs + S3C_DTXFSTS(hs_ep->index)); | |
515 | ||
516 | can_write &= 0xffff; | |
517 | can_write *= 4; | |
5b7d70c6 BD |
518 | } else { |
519 | if (S3C_GNPTXSTS_NPTxQSpcAvail_GET(gnptxsts) == 0) { | |
520 | dev_dbg(hsotg->dev, | |
521 | "%s: no queue slots available (0x%08x)\n", | |
522 | __func__, gnptxsts); | |
523 | ||
524 | s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_NPTxFEmp); | |
525 | return -ENOSPC; | |
526 | } | |
527 | ||
528 | can_write = S3C_GNPTXSTS_NPTxFSpcAvail_GET(gnptxsts); | |
679f9b7c | 529 | can_write *= 4; /* fifo size is in 32bit quantities. */ |
5b7d70c6 BD |
530 | } |
531 | ||
532 | dev_dbg(hsotg->dev, "%s: GNPTXSTS=%08x, can=%d, to=%d, mps %d\n", | |
533 | __func__, gnptxsts, can_write, to_write, hs_ep->ep.maxpacket); | |
534 | ||
535 | /* limit to 512 bytes of data, it seems at least on the non-periodic | |
536 | * FIFO, requests of >512 cause the endpoint to get stuck with a | |
537 | * fragment of the end of the transfer in it. | |
538 | */ | |
539 | if (can_write > 512) | |
540 | can_write = 512; | |
541 | ||
03e10e5a BD |
542 | /* limit the write to one max-packet size worth of data, but allow |
543 | * the transfer to return that it did not run out of fifo space | |
544 | * doing it. */ | |
545 | if (to_write > hs_ep->ep.maxpacket) { | |
546 | to_write = hs_ep->ep.maxpacket; | |
547 | ||
548 | s3c_hsotg_en_gsint(hsotg, | |
549 | periodic ? S3C_GINTSTS_PTxFEmp : | |
550 | S3C_GINTSTS_NPTxFEmp); | |
551 | } | |
552 | ||
5b7d70c6 BD |
553 | /* see if we can write data */ |
554 | ||
555 | if (to_write > can_write) { | |
556 | to_write = can_write; | |
557 | pkt_round = to_write % hs_ep->ep.maxpacket; | |
558 | ||
559 | /* Not sure, but we probably shouldn't be writing partial | |
560 | * packets into the FIFO, so round the write down to an | |
561 | * exact number of packets. | |
562 | * | |
563 | * Note, we do not currently check to see if we can ever | |
564 | * write a full packet or not to the FIFO. | |
565 | */ | |
566 | ||
567 | if (pkt_round) | |
568 | to_write -= pkt_round; | |
569 | ||
570 | /* enable correct FIFO interrupt to alert us when there | |
571 | * is more room left. */ | |
572 | ||
573 | s3c_hsotg_en_gsint(hsotg, | |
574 | periodic ? S3C_GINTSTS_PTxFEmp : | |
575 | S3C_GINTSTS_NPTxFEmp); | |
576 | } | |
577 | ||
578 | dev_dbg(hsotg->dev, "write %d/%d, can_write %d, done %d\n", | |
579 | to_write, hs_req->req.length, can_write, buf_pos); | |
580 | ||
581 | if (to_write <= 0) | |
582 | return -ENOSPC; | |
583 | ||
584 | hs_req->req.actual = buf_pos + to_write; | |
585 | hs_ep->total_data += to_write; | |
586 | ||
587 | if (periodic) | |
588 | hs_ep->fifo_load += to_write; | |
589 | ||
590 | to_write = DIV_ROUND_UP(to_write, 4); | |
591 | data = hs_req->req.buf + buf_pos; | |
592 | ||
593 | writesl(hsotg->regs + S3C_EPFIFO(hs_ep->index), data, to_write); | |
594 | ||
595 | return (to_write >= can_write) ? -ENOSPC : 0; | |
596 | } | |
597 | ||
598 | /** | |
599 | * get_ep_limit - get the maximum data legnth for this endpoint | |
600 | * @hs_ep: The endpoint | |
601 | * | |
602 | * Return the maximum data that can be queued in one go on a given endpoint | |
603 | * so that transfers that are too long can be split. | |
604 | */ | |
605 | static unsigned get_ep_limit(struct s3c_hsotg_ep *hs_ep) | |
606 | { | |
607 | int index = hs_ep->index; | |
608 | unsigned maxsize; | |
609 | unsigned maxpkt; | |
610 | ||
611 | if (index != 0) { | |
612 | maxsize = S3C_DxEPTSIZ_XferSize_LIMIT + 1; | |
613 | maxpkt = S3C_DxEPTSIZ_PktCnt_LIMIT + 1; | |
614 | } else { | |
b05ca580 | 615 | maxsize = 64+64; |
5b7d70c6 | 616 | if (hs_ep->dir_in) { |
5b7d70c6 BD |
617 | maxpkt = S3C_DIEPTSIZ0_PktCnt_LIMIT + 1; |
618 | } else { | |
5b7d70c6 BD |
619 | maxpkt = 2; |
620 | } | |
621 | } | |
622 | ||
623 | /* we made the constant loading easier above by using +1 */ | |
624 | maxpkt--; | |
625 | maxsize--; | |
626 | ||
627 | /* constrain by packet count if maxpkts*pktsize is greater | |
628 | * than the length register size. */ | |
629 | ||
630 | if ((maxpkt * hs_ep->ep.maxpacket) < maxsize) | |
631 | maxsize = maxpkt * hs_ep->ep.maxpacket; | |
632 | ||
633 | return maxsize; | |
634 | } | |
635 | ||
636 | /** | |
637 | * s3c_hsotg_start_req - start a USB request from an endpoint's queue | |
638 | * @hsotg: The controller state. | |
639 | * @hs_ep: The endpoint to process a request for | |
640 | * @hs_req: The request to start. | |
641 | * @continuing: True if we are doing more for the current request. | |
642 | * | |
643 | * Start the given request running by setting the endpoint registers | |
644 | * appropriately, and writing any data to the FIFOs. | |
645 | */ | |
646 | static void s3c_hsotg_start_req(struct s3c_hsotg *hsotg, | |
647 | struct s3c_hsotg_ep *hs_ep, | |
648 | struct s3c_hsotg_req *hs_req, | |
649 | bool continuing) | |
650 | { | |
651 | struct usb_request *ureq = &hs_req->req; | |
652 | int index = hs_ep->index; | |
653 | int dir_in = hs_ep->dir_in; | |
654 | u32 epctrl_reg; | |
655 | u32 epsize_reg; | |
656 | u32 epsize; | |
657 | u32 ctrl; | |
658 | unsigned length; | |
659 | unsigned packets; | |
660 | unsigned maxreq; | |
661 | ||
662 | if (index != 0) { | |
663 | if (hs_ep->req && !continuing) { | |
664 | dev_err(hsotg->dev, "%s: active request\n", __func__); | |
665 | WARN_ON(1); | |
666 | return; | |
667 | } else if (hs_ep->req != hs_req && continuing) { | |
668 | dev_err(hsotg->dev, | |
669 | "%s: continue different req\n", __func__); | |
670 | WARN_ON(1); | |
671 | return; | |
672 | } | |
673 | } | |
674 | ||
675 | epctrl_reg = dir_in ? S3C_DIEPCTL(index) : S3C_DOEPCTL(index); | |
676 | epsize_reg = dir_in ? S3C_DIEPTSIZ(index) : S3C_DOEPTSIZ(index); | |
677 | ||
678 | dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x, ep %d, dir %s\n", | |
679 | __func__, readl(hsotg->regs + epctrl_reg), index, | |
680 | hs_ep->dir_in ? "in" : "out"); | |
681 | ||
9c39ddc6 AT |
682 | /* If endpoint is stalled, we will restart request later */ |
683 | ctrl = readl(hsotg->regs + epctrl_reg); | |
684 | ||
685 | if (ctrl & S3C_DxEPCTL_Stall) { | |
686 | dev_warn(hsotg->dev, "%s: ep%d is stalled\n", __func__, index); | |
687 | return; | |
688 | } | |
689 | ||
5b7d70c6 BD |
690 | length = ureq->length - ureq->actual; |
691 | ||
692 | if (0) | |
693 | dev_dbg(hsotg->dev, | |
694 | "REQ buf %p len %d dma 0x%08x noi=%d zp=%d snok=%d\n", | |
695 | ureq->buf, length, ureq->dma, | |
696 | ureq->no_interrupt, ureq->zero, ureq->short_not_ok); | |
697 | ||
698 | maxreq = get_ep_limit(hs_ep); | |
699 | if (length > maxreq) { | |
700 | int round = maxreq % hs_ep->ep.maxpacket; | |
701 | ||
702 | dev_dbg(hsotg->dev, "%s: length %d, max-req %d, r %d\n", | |
703 | __func__, length, maxreq, round); | |
704 | ||
705 | /* round down to multiple of packets */ | |
706 | if (round) | |
707 | maxreq -= round; | |
708 | ||
709 | length = maxreq; | |
710 | } | |
711 | ||
712 | if (length) | |
713 | packets = DIV_ROUND_UP(length, hs_ep->ep.maxpacket); | |
714 | else | |
715 | packets = 1; /* send one packet if length is zero. */ | |
716 | ||
717 | if (dir_in && index != 0) | |
718 | epsize = S3C_DxEPTSIZ_MC(1); | |
719 | else | |
720 | epsize = 0; | |
721 | ||
722 | if (index != 0 && ureq->zero) { | |
723 | /* test for the packets being exactly right for the | |
724 | * transfer */ | |
725 | ||
726 | if (length == (packets * hs_ep->ep.maxpacket)) | |
727 | packets++; | |
728 | } | |
729 | ||
730 | epsize |= S3C_DxEPTSIZ_PktCnt(packets); | |
731 | epsize |= S3C_DxEPTSIZ_XferSize(length); | |
732 | ||
733 | dev_dbg(hsotg->dev, "%s: %d@%d/%d, 0x%08x => 0x%08x\n", | |
734 | __func__, packets, length, ureq->length, epsize, epsize_reg); | |
735 | ||
736 | /* store the request as the current one we're doing */ | |
737 | hs_ep->req = hs_req; | |
738 | ||
739 | /* write size / packets */ | |
740 | writel(epsize, hsotg->regs + epsize_reg); | |
741 | ||
5b7d70c6 BD |
742 | if (using_dma(hsotg)) { |
743 | unsigned int dma_reg; | |
744 | ||
745 | /* write DMA address to control register, buffer already | |
746 | * synced by s3c_hsotg_ep_queue(). */ | |
747 | ||
748 | dma_reg = dir_in ? S3C_DIEPDMA(index) : S3C_DOEPDMA(index); | |
749 | writel(ureq->dma, hsotg->regs + dma_reg); | |
750 | ||
751 | dev_dbg(hsotg->dev, "%s: 0x%08x => 0x%08x\n", | |
752 | __func__, ureq->dma, dma_reg); | |
753 | } | |
754 | ||
755 | ctrl |= S3C_DxEPCTL_EPEna; /* ensure ep enabled */ | |
756 | ctrl |= S3C_DxEPCTL_USBActEp; | |
757 | ctrl |= S3C_DxEPCTL_CNAK; /* clear NAK set by core */ | |
758 | ||
759 | dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl); | |
760 | writel(ctrl, hsotg->regs + epctrl_reg); | |
761 | ||
762 | /* set these, it seems that DMA support increments past the end | |
763 | * of the packet buffer so we need to calculate the length from | |
764 | * this information. */ | |
765 | hs_ep->size_loaded = length; | |
766 | hs_ep->last_load = ureq->actual; | |
767 | ||
768 | if (dir_in && !using_dma(hsotg)) { | |
769 | /* set these anyway, we may need them for non-periodic in */ | |
770 | hs_ep->fifo_load = 0; | |
771 | ||
772 | s3c_hsotg_write_fifo(hsotg, hs_ep, hs_req); | |
773 | } | |
774 | ||
775 | /* clear the INTknTXFEmpMsk when we start request, more as a aide | |
776 | * to debugging to see what is going on. */ | |
777 | if (dir_in) | |
778 | writel(S3C_DIEPMSK_INTknTXFEmpMsk, | |
779 | hsotg->regs + S3C_DIEPINT(index)); | |
780 | ||
781 | /* Note, trying to clear the NAK here causes problems with transmit | |
25985edc | 782 | * on the S3C6400 ending up with the TXFIFO becoming full. */ |
5b7d70c6 BD |
783 | |
784 | /* check ep is enabled */ | |
785 | if (!(readl(hsotg->regs + epctrl_reg) & S3C_DxEPCTL_EPEna)) | |
786 | dev_warn(hsotg->dev, | |
787 | "ep%d: failed to become enabled (DxEPCTL=0x%08x)?\n", | |
788 | index, readl(hsotg->regs + epctrl_reg)); | |
789 | ||
790 | dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", | |
791 | __func__, readl(hsotg->regs + epctrl_reg)); | |
792 | } | |
793 | ||
794 | /** | |
795 | * s3c_hsotg_map_dma - map the DMA memory being used for the request | |
796 | * @hsotg: The device state. | |
797 | * @hs_ep: The endpoint the request is on. | |
798 | * @req: The request being processed. | |
799 | * | |
800 | * We've been asked to queue a request, so ensure that the memory buffer | |
801 | * is correctly setup for DMA. If we've been passed an extant DMA address | |
802 | * then ensure the buffer has been synced to memory. If our buffer has no | |
803 | * DMA memory, then we map the memory and mark our request to allow us to | |
804 | * cleanup on completion. | |
805 | */ | |
806 | static int s3c_hsotg_map_dma(struct s3c_hsotg *hsotg, | |
807 | struct s3c_hsotg_ep *hs_ep, | |
808 | struct usb_request *req) | |
809 | { | |
810 | enum dma_data_direction dir; | |
811 | struct s3c_hsotg_req *hs_req = our_req(req); | |
812 | ||
813 | dir = hs_ep->dir_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE; | |
814 | ||
815 | /* if the length is zero, ignore the DMA data */ | |
816 | if (hs_req->req.length == 0) | |
817 | return 0; | |
818 | ||
819 | if (req->dma == DMA_ADDR_INVALID) { | |
820 | dma_addr_t dma; | |
821 | ||
822 | dma = dma_map_single(hsotg->dev, req->buf, req->length, dir); | |
823 | ||
824 | if (unlikely(dma_mapping_error(hsotg->dev, dma))) | |
825 | goto dma_error; | |
826 | ||
827 | if (dma & 3) { | |
828 | dev_err(hsotg->dev, "%s: unaligned dma buffer\n", | |
829 | __func__); | |
830 | ||
831 | dma_unmap_single(hsotg->dev, dma, req->length, dir); | |
832 | return -EINVAL; | |
833 | } | |
834 | ||
835 | hs_req->mapped = 1; | |
836 | req->dma = dma; | |
837 | } else { | |
5b520259 | 838 | dma_sync_single_for_cpu(hsotg->dev, req->dma, req->length, dir); |
5b7d70c6 BD |
839 | hs_req->mapped = 0; |
840 | } | |
841 | ||
842 | return 0; | |
843 | ||
844 | dma_error: | |
845 | dev_err(hsotg->dev, "%s: failed to map buffer %p, %d bytes\n", | |
846 | __func__, req->buf, req->length); | |
847 | ||
848 | return -EIO; | |
849 | } | |
850 | ||
851 | static int s3c_hsotg_ep_queue(struct usb_ep *ep, struct usb_request *req, | |
852 | gfp_t gfp_flags) | |
853 | { | |
854 | struct s3c_hsotg_req *hs_req = our_req(req); | |
855 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
856 | struct s3c_hsotg *hs = hs_ep->parent; | |
857 | unsigned long irqflags; | |
858 | bool first; | |
859 | ||
860 | dev_dbg(hs->dev, "%s: req %p: %d@%p, noi=%d, zero=%d, snok=%d\n", | |
861 | ep->name, req, req->length, req->buf, req->no_interrupt, | |
862 | req->zero, req->short_not_ok); | |
863 | ||
864 | /* initialise status of the request */ | |
865 | INIT_LIST_HEAD(&hs_req->queue); | |
866 | req->actual = 0; | |
867 | req->status = -EINPROGRESS; | |
868 | ||
869 | /* if we're using DMA, sync the buffers as necessary */ | |
870 | if (using_dma(hs)) { | |
871 | int ret = s3c_hsotg_map_dma(hs, hs_ep, req); | |
872 | if (ret) | |
873 | return ret; | |
874 | } | |
875 | ||
876 | spin_lock_irqsave(&hs_ep->lock, irqflags); | |
877 | ||
878 | first = list_empty(&hs_ep->queue); | |
879 | list_add_tail(&hs_req->queue, &hs_ep->queue); | |
880 | ||
881 | if (first) | |
882 | s3c_hsotg_start_req(hs, hs_ep, hs_req, false); | |
883 | ||
884 | spin_unlock_irqrestore(&hs_ep->lock, irqflags); | |
885 | ||
886 | return 0; | |
887 | } | |
888 | ||
889 | static void s3c_hsotg_ep_free_request(struct usb_ep *ep, | |
890 | struct usb_request *req) | |
891 | { | |
892 | struct s3c_hsotg_req *hs_req = our_req(req); | |
893 | ||
894 | kfree(hs_req); | |
895 | } | |
896 | ||
897 | /** | |
898 | * s3c_hsotg_complete_oursetup - setup completion callback | |
899 | * @ep: The endpoint the request was on. | |
900 | * @req: The request completed. | |
901 | * | |
902 | * Called on completion of any requests the driver itself | |
903 | * submitted that need cleaning up. | |
904 | */ | |
905 | static void s3c_hsotg_complete_oursetup(struct usb_ep *ep, | |
906 | struct usb_request *req) | |
907 | { | |
908 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
909 | struct s3c_hsotg *hsotg = hs_ep->parent; | |
910 | ||
911 | dev_dbg(hsotg->dev, "%s: ep %p, req %p\n", __func__, ep, req); | |
912 | ||
913 | s3c_hsotg_ep_free_request(ep, req); | |
914 | } | |
915 | ||
916 | /** | |
917 | * ep_from_windex - convert control wIndex value to endpoint | |
918 | * @hsotg: The driver state. | |
919 | * @windex: The control request wIndex field (in host order). | |
920 | * | |
921 | * Convert the given wIndex into a pointer to an driver endpoint | |
922 | * structure, or return NULL if it is not a valid endpoint. | |
923 | */ | |
924 | static struct s3c_hsotg_ep *ep_from_windex(struct s3c_hsotg *hsotg, | |
925 | u32 windex) | |
926 | { | |
927 | struct s3c_hsotg_ep *ep = &hsotg->eps[windex & 0x7F]; | |
928 | int dir = (windex & USB_DIR_IN) ? 1 : 0; | |
929 | int idx = windex & 0x7F; | |
930 | ||
931 | if (windex >= 0x100) | |
932 | return NULL; | |
933 | ||
934 | if (idx > S3C_HSOTG_EPS) | |
935 | return NULL; | |
936 | ||
937 | if (idx && ep->dir_in != dir) | |
938 | return NULL; | |
939 | ||
940 | return ep; | |
941 | } | |
942 | ||
943 | /** | |
944 | * s3c_hsotg_send_reply - send reply to control request | |
945 | * @hsotg: The device state | |
946 | * @ep: Endpoint 0 | |
947 | * @buff: Buffer for request | |
948 | * @length: Length of reply. | |
949 | * | |
950 | * Create a request and queue it on the given endpoint. This is useful as | |
951 | * an internal method of sending replies to certain control requests, etc. | |
952 | */ | |
953 | static int s3c_hsotg_send_reply(struct s3c_hsotg *hsotg, | |
954 | struct s3c_hsotg_ep *ep, | |
955 | void *buff, | |
956 | int length) | |
957 | { | |
958 | struct usb_request *req; | |
959 | int ret; | |
960 | ||
961 | dev_dbg(hsotg->dev, "%s: buff %p, len %d\n", __func__, buff, length); | |
962 | ||
963 | req = s3c_hsotg_ep_alloc_request(&ep->ep, GFP_ATOMIC); | |
964 | hsotg->ep0_reply = req; | |
965 | if (!req) { | |
966 | dev_warn(hsotg->dev, "%s: cannot alloc req\n", __func__); | |
967 | return -ENOMEM; | |
968 | } | |
969 | ||
970 | req->buf = hsotg->ep0_buff; | |
971 | req->length = length; | |
972 | req->zero = 1; /* always do zero-length final transfer */ | |
973 | req->complete = s3c_hsotg_complete_oursetup; | |
974 | ||
975 | if (length) | |
976 | memcpy(req->buf, buff, length); | |
977 | else | |
978 | ep->sent_zlp = 1; | |
979 | ||
980 | ret = s3c_hsotg_ep_queue(&ep->ep, req, GFP_ATOMIC); | |
981 | if (ret) { | |
982 | dev_warn(hsotg->dev, "%s: cannot queue req\n", __func__); | |
983 | return ret; | |
984 | } | |
985 | ||
986 | return 0; | |
987 | } | |
988 | ||
989 | /** | |
990 | * s3c_hsotg_process_req_status - process request GET_STATUS | |
991 | * @hsotg: The device state | |
992 | * @ctrl: USB control request | |
993 | */ | |
994 | static int s3c_hsotg_process_req_status(struct s3c_hsotg *hsotg, | |
995 | struct usb_ctrlrequest *ctrl) | |
996 | { | |
997 | struct s3c_hsotg_ep *ep0 = &hsotg->eps[0]; | |
998 | struct s3c_hsotg_ep *ep; | |
999 | __le16 reply; | |
1000 | int ret; | |
1001 | ||
1002 | dev_dbg(hsotg->dev, "%s: USB_REQ_GET_STATUS\n", __func__); | |
1003 | ||
1004 | if (!ep0->dir_in) { | |
1005 | dev_warn(hsotg->dev, "%s: direction out?\n", __func__); | |
1006 | return -EINVAL; | |
1007 | } | |
1008 | ||
1009 | switch (ctrl->bRequestType & USB_RECIP_MASK) { | |
1010 | case USB_RECIP_DEVICE: | |
1011 | reply = cpu_to_le16(0); /* bit 0 => self powered, | |
1012 | * bit 1 => remote wakeup */ | |
1013 | break; | |
1014 | ||
1015 | case USB_RECIP_INTERFACE: | |
1016 | /* currently, the data result should be zero */ | |
1017 | reply = cpu_to_le16(0); | |
1018 | break; | |
1019 | ||
1020 | case USB_RECIP_ENDPOINT: | |
1021 | ep = ep_from_windex(hsotg, le16_to_cpu(ctrl->wIndex)); | |
1022 | if (!ep) | |
1023 | return -ENOENT; | |
1024 | ||
1025 | reply = cpu_to_le16(ep->halted ? 1 : 0); | |
1026 | break; | |
1027 | ||
1028 | default: | |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | if (le16_to_cpu(ctrl->wLength) != 2) | |
1033 | return -EINVAL; | |
1034 | ||
1035 | ret = s3c_hsotg_send_reply(hsotg, ep0, &reply, 2); | |
1036 | if (ret) { | |
1037 | dev_err(hsotg->dev, "%s: failed to send reply\n", __func__); | |
1038 | return ret; | |
1039 | } | |
1040 | ||
1041 | return 1; | |
1042 | } | |
1043 | ||
1044 | static int s3c_hsotg_ep_sethalt(struct usb_ep *ep, int value); | |
1045 | ||
9c39ddc6 AT |
1046 | /** |
1047 | * get_ep_head - return the first request on the endpoint | |
1048 | * @hs_ep: The controller endpoint to get | |
1049 | * | |
1050 | * Get the first request on the endpoint. | |
1051 | */ | |
1052 | static struct s3c_hsotg_req *get_ep_head(struct s3c_hsotg_ep *hs_ep) | |
1053 | { | |
1054 | if (list_empty(&hs_ep->queue)) | |
1055 | return NULL; | |
1056 | ||
1057 | return list_first_entry(&hs_ep->queue, struct s3c_hsotg_req, queue); | |
1058 | } | |
1059 | ||
5b7d70c6 BD |
1060 | /** |
1061 | * s3c_hsotg_process_req_featire - process request {SET,CLEAR}_FEATURE | |
1062 | * @hsotg: The device state | |
1063 | * @ctrl: USB control request | |
1064 | */ | |
1065 | static int s3c_hsotg_process_req_feature(struct s3c_hsotg *hsotg, | |
1066 | struct usb_ctrlrequest *ctrl) | |
1067 | { | |
26ab3d0c | 1068 | struct s3c_hsotg_ep *ep0 = &hsotg->eps[0]; |
9c39ddc6 AT |
1069 | struct s3c_hsotg_req *hs_req; |
1070 | bool restart; | |
5b7d70c6 BD |
1071 | bool set = (ctrl->bRequest == USB_REQ_SET_FEATURE); |
1072 | struct s3c_hsotg_ep *ep; | |
26ab3d0c | 1073 | int ret; |
5b7d70c6 BD |
1074 | |
1075 | dev_dbg(hsotg->dev, "%s: %s_FEATURE\n", | |
1076 | __func__, set ? "SET" : "CLEAR"); | |
1077 | ||
1078 | if (ctrl->bRequestType == USB_RECIP_ENDPOINT) { | |
1079 | ep = ep_from_windex(hsotg, le16_to_cpu(ctrl->wIndex)); | |
1080 | if (!ep) { | |
1081 | dev_dbg(hsotg->dev, "%s: no endpoint for 0x%04x\n", | |
1082 | __func__, le16_to_cpu(ctrl->wIndex)); | |
1083 | return -ENOENT; | |
1084 | } | |
1085 | ||
1086 | switch (le16_to_cpu(ctrl->wValue)) { | |
1087 | case USB_ENDPOINT_HALT: | |
1088 | s3c_hsotg_ep_sethalt(&ep->ep, set); | |
26ab3d0c AT |
1089 | |
1090 | ret = s3c_hsotg_send_reply(hsotg, ep0, NULL, 0); | |
1091 | if (ret) { | |
1092 | dev_err(hsotg->dev, | |
1093 | "%s: failed to send reply\n", __func__); | |
1094 | return ret; | |
1095 | } | |
9c39ddc6 AT |
1096 | |
1097 | if (!set) { | |
1098 | /* | |
1099 | * If we have request in progress, | |
1100 | * then complete it | |
1101 | */ | |
1102 | if (ep->req) { | |
1103 | hs_req = ep->req; | |
1104 | ep->req = NULL; | |
1105 | list_del_init(&hs_req->queue); | |
1106 | hs_req->req.complete(&ep->ep, | |
1107 | &hs_req->req); | |
1108 | } | |
1109 | ||
1110 | /* If we have pending request, then start it */ | |
1111 | restart = !list_empty(&ep->queue); | |
1112 | if (restart) { | |
1113 | hs_req = get_ep_head(ep); | |
1114 | s3c_hsotg_start_req(hsotg, ep, | |
1115 | hs_req, false); | |
1116 | } | |
1117 | } | |
1118 | ||
5b7d70c6 BD |
1119 | break; |
1120 | ||
1121 | default: | |
1122 | return -ENOENT; | |
1123 | } | |
1124 | } else | |
1125 | return -ENOENT; /* currently only deal with endpoint */ | |
1126 | ||
1127 | return 1; | |
1128 | } | |
1129 | ||
1130 | /** | |
1131 | * s3c_hsotg_process_control - process a control request | |
1132 | * @hsotg: The device state | |
1133 | * @ctrl: The control request received | |
1134 | * | |
1135 | * The controller has received the SETUP phase of a control request, and | |
1136 | * needs to work out what to do next (and whether to pass it on to the | |
1137 | * gadget driver). | |
1138 | */ | |
1139 | static void s3c_hsotg_process_control(struct s3c_hsotg *hsotg, | |
1140 | struct usb_ctrlrequest *ctrl) | |
1141 | { | |
1142 | struct s3c_hsotg_ep *ep0 = &hsotg->eps[0]; | |
1143 | int ret = 0; | |
1144 | u32 dcfg; | |
1145 | ||
1146 | ep0->sent_zlp = 0; | |
1147 | ||
1148 | dev_dbg(hsotg->dev, "ctrl Req=%02x, Type=%02x, V=%04x, L=%04x\n", | |
1149 | ctrl->bRequest, ctrl->bRequestType, | |
1150 | ctrl->wValue, ctrl->wLength); | |
1151 | ||
1152 | /* record the direction of the request, for later use when enquing | |
1153 | * packets onto EP0. */ | |
1154 | ||
1155 | ep0->dir_in = (ctrl->bRequestType & USB_DIR_IN) ? 1 : 0; | |
1156 | dev_dbg(hsotg->dev, "ctrl: dir_in=%d\n", ep0->dir_in); | |
1157 | ||
1158 | /* if we've no data with this request, then the last part of the | |
1159 | * transaction is going to implicitly be IN. */ | |
1160 | if (ctrl->wLength == 0) | |
1161 | ep0->dir_in = 1; | |
1162 | ||
1163 | if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { | |
1164 | switch (ctrl->bRequest) { | |
1165 | case USB_REQ_SET_ADDRESS: | |
1166 | dcfg = readl(hsotg->regs + S3C_DCFG); | |
1167 | dcfg &= ~S3C_DCFG_DevAddr_MASK; | |
1168 | dcfg |= ctrl->wValue << S3C_DCFG_DevAddr_SHIFT; | |
1169 | writel(dcfg, hsotg->regs + S3C_DCFG); | |
1170 | ||
1171 | dev_info(hsotg->dev, "new address %d\n", ctrl->wValue); | |
1172 | ||
1173 | ret = s3c_hsotg_send_reply(hsotg, ep0, NULL, 0); | |
1174 | return; | |
1175 | ||
1176 | case USB_REQ_GET_STATUS: | |
1177 | ret = s3c_hsotg_process_req_status(hsotg, ctrl); | |
1178 | break; | |
1179 | ||
1180 | case USB_REQ_CLEAR_FEATURE: | |
1181 | case USB_REQ_SET_FEATURE: | |
1182 | ret = s3c_hsotg_process_req_feature(hsotg, ctrl); | |
1183 | break; | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | /* as a fallback, try delivering it to the driver to deal with */ | |
1188 | ||
1189 | if (ret == 0 && hsotg->driver) { | |
1190 | ret = hsotg->driver->setup(&hsotg->gadget, ctrl); | |
1191 | if (ret < 0) | |
1192 | dev_dbg(hsotg->dev, "driver->setup() ret %d\n", ret); | |
1193 | } | |
1194 | ||
5b7d70c6 BD |
1195 | /* the request is either unhandlable, or is not formatted correctly |
1196 | * so respond with a STALL for the status stage to indicate failure. | |
1197 | */ | |
1198 | ||
1199 | if (ret < 0) { | |
1200 | u32 reg; | |
1201 | u32 ctrl; | |
1202 | ||
1203 | dev_dbg(hsotg->dev, "ep0 stall (dir=%d)\n", ep0->dir_in); | |
1204 | reg = (ep0->dir_in) ? S3C_DIEPCTL0 : S3C_DOEPCTL0; | |
1205 | ||
1206 | /* S3C_DxEPCTL_Stall will be cleared by EP once it has | |
1207 | * taken effect, so no need to clear later. */ | |
1208 | ||
1209 | ctrl = readl(hsotg->regs + reg); | |
1210 | ctrl |= S3C_DxEPCTL_Stall; | |
1211 | ctrl |= S3C_DxEPCTL_CNAK; | |
1212 | writel(ctrl, hsotg->regs + reg); | |
1213 | ||
1214 | dev_dbg(hsotg->dev, | |
25985edc | 1215 | "written DxEPCTL=0x%08x to %08x (DxEPCTL=0x%08x)\n", |
5b7d70c6 BD |
1216 | ctrl, reg, readl(hsotg->regs + reg)); |
1217 | ||
25985edc | 1218 | /* don't believe we need to anything more to get the EP |
5b7d70c6 BD |
1219 | * to reply with a STALL packet */ |
1220 | } | |
1221 | } | |
1222 | ||
1223 | static void s3c_hsotg_enqueue_setup(struct s3c_hsotg *hsotg); | |
1224 | ||
1225 | /** | |
1226 | * s3c_hsotg_complete_setup - completion of a setup transfer | |
1227 | * @ep: The endpoint the request was on. | |
1228 | * @req: The request completed. | |
1229 | * | |
1230 | * Called on completion of any requests the driver itself submitted for | |
1231 | * EP0 setup packets | |
1232 | */ | |
1233 | static void s3c_hsotg_complete_setup(struct usb_ep *ep, | |
1234 | struct usb_request *req) | |
1235 | { | |
1236 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
1237 | struct s3c_hsotg *hsotg = hs_ep->parent; | |
1238 | ||
1239 | if (req->status < 0) { | |
1240 | dev_dbg(hsotg->dev, "%s: failed %d\n", __func__, req->status); | |
1241 | return; | |
1242 | } | |
1243 | ||
1244 | if (req->actual == 0) | |
1245 | s3c_hsotg_enqueue_setup(hsotg); | |
1246 | else | |
1247 | s3c_hsotg_process_control(hsotg, req->buf); | |
1248 | } | |
1249 | ||
1250 | /** | |
1251 | * s3c_hsotg_enqueue_setup - start a request for EP0 packets | |
1252 | * @hsotg: The device state. | |
1253 | * | |
1254 | * Enqueue a request on EP0 if necessary to received any SETUP packets | |
1255 | * received from the host. | |
1256 | */ | |
1257 | static void s3c_hsotg_enqueue_setup(struct s3c_hsotg *hsotg) | |
1258 | { | |
1259 | struct usb_request *req = hsotg->ctrl_req; | |
1260 | struct s3c_hsotg_req *hs_req = our_req(req); | |
1261 | int ret; | |
1262 | ||
1263 | dev_dbg(hsotg->dev, "%s: queueing setup request\n", __func__); | |
1264 | ||
1265 | req->zero = 0; | |
1266 | req->length = 8; | |
1267 | req->buf = hsotg->ctrl_buff; | |
1268 | req->complete = s3c_hsotg_complete_setup; | |
1269 | ||
1270 | if (!list_empty(&hs_req->queue)) { | |
1271 | dev_dbg(hsotg->dev, "%s already queued???\n", __func__); | |
1272 | return; | |
1273 | } | |
1274 | ||
1275 | hsotg->eps[0].dir_in = 0; | |
1276 | ||
1277 | ret = s3c_hsotg_ep_queue(&hsotg->eps[0].ep, req, GFP_ATOMIC); | |
1278 | if (ret < 0) { | |
1279 | dev_err(hsotg->dev, "%s: failed queue (%d)\n", __func__, ret); | |
1280 | /* Don't think there's much we can do other than watch the | |
1281 | * driver fail. */ | |
1282 | } | |
1283 | } | |
1284 | ||
5b7d70c6 BD |
1285 | /** |
1286 | * s3c_hsotg_complete_request - complete a request given to us | |
1287 | * @hsotg: The device state. | |
1288 | * @hs_ep: The endpoint the request was on. | |
1289 | * @hs_req: The request to complete. | |
1290 | * @result: The result code (0 => Ok, otherwise errno) | |
1291 | * | |
1292 | * The given request has finished, so call the necessary completion | |
1293 | * if it has one and then look to see if we can start a new request | |
1294 | * on the endpoint. | |
1295 | * | |
1296 | * Note, expects the ep to already be locked as appropriate. | |
1297 | */ | |
1298 | static void s3c_hsotg_complete_request(struct s3c_hsotg *hsotg, | |
1299 | struct s3c_hsotg_ep *hs_ep, | |
1300 | struct s3c_hsotg_req *hs_req, | |
1301 | int result) | |
1302 | { | |
1303 | bool restart; | |
1304 | ||
1305 | if (!hs_req) { | |
1306 | dev_dbg(hsotg->dev, "%s: nothing to complete?\n", __func__); | |
1307 | return; | |
1308 | } | |
1309 | ||
1310 | dev_dbg(hsotg->dev, "complete: ep %p %s, req %p, %d => %p\n", | |
1311 | hs_ep, hs_ep->ep.name, hs_req, result, hs_req->req.complete); | |
1312 | ||
1313 | /* only replace the status if we've not already set an error | |
1314 | * from a previous transaction */ | |
1315 | ||
1316 | if (hs_req->req.status == -EINPROGRESS) | |
1317 | hs_req->req.status = result; | |
1318 | ||
1319 | hs_ep->req = NULL; | |
1320 | list_del_init(&hs_req->queue); | |
1321 | ||
1322 | if (using_dma(hsotg)) | |
1323 | s3c_hsotg_unmap_dma(hsotg, hs_ep, hs_req); | |
1324 | ||
1325 | /* call the complete request with the locks off, just in case the | |
1326 | * request tries to queue more work for this endpoint. */ | |
1327 | ||
1328 | if (hs_req->req.complete) { | |
1329 | spin_unlock(&hs_ep->lock); | |
1330 | hs_req->req.complete(&hs_ep->ep, &hs_req->req); | |
1331 | spin_lock(&hs_ep->lock); | |
1332 | } | |
1333 | ||
1334 | /* Look to see if there is anything else to do. Note, the completion | |
1335 | * of the previous request may have caused a new request to be started | |
1336 | * so be careful when doing this. */ | |
1337 | ||
1338 | if (!hs_ep->req && result >= 0) { | |
1339 | restart = !list_empty(&hs_ep->queue); | |
1340 | if (restart) { | |
1341 | hs_req = get_ep_head(hs_ep); | |
1342 | s3c_hsotg_start_req(hsotg, hs_ep, hs_req, false); | |
1343 | } | |
1344 | } | |
1345 | } | |
1346 | ||
1347 | /** | |
1348 | * s3c_hsotg_complete_request_lock - complete a request given to us (locked) | |
1349 | * @hsotg: The device state. | |
1350 | * @hs_ep: The endpoint the request was on. | |
1351 | * @hs_req: The request to complete. | |
1352 | * @result: The result code (0 => Ok, otherwise errno) | |
1353 | * | |
1354 | * See s3c_hsotg_complete_request(), but called with the endpoint's | |
1355 | * lock held. | |
1356 | */ | |
1357 | static void s3c_hsotg_complete_request_lock(struct s3c_hsotg *hsotg, | |
1358 | struct s3c_hsotg_ep *hs_ep, | |
1359 | struct s3c_hsotg_req *hs_req, | |
1360 | int result) | |
1361 | { | |
1362 | unsigned long flags; | |
1363 | ||
1364 | spin_lock_irqsave(&hs_ep->lock, flags); | |
1365 | s3c_hsotg_complete_request(hsotg, hs_ep, hs_req, result); | |
1366 | spin_unlock_irqrestore(&hs_ep->lock, flags); | |
1367 | } | |
1368 | ||
1369 | /** | |
1370 | * s3c_hsotg_rx_data - receive data from the FIFO for an endpoint | |
1371 | * @hsotg: The device state. | |
1372 | * @ep_idx: The endpoint index for the data | |
1373 | * @size: The size of data in the fifo, in bytes | |
1374 | * | |
1375 | * The FIFO status shows there is data to read from the FIFO for a given | |
1376 | * endpoint, so sort out whether we need to read the data into a request | |
1377 | * that has been made for that endpoint. | |
1378 | */ | |
1379 | static void s3c_hsotg_rx_data(struct s3c_hsotg *hsotg, int ep_idx, int size) | |
1380 | { | |
1381 | struct s3c_hsotg_ep *hs_ep = &hsotg->eps[ep_idx]; | |
1382 | struct s3c_hsotg_req *hs_req = hs_ep->req; | |
1383 | void __iomem *fifo = hsotg->regs + S3C_EPFIFO(ep_idx); | |
1384 | int to_read; | |
1385 | int max_req; | |
1386 | int read_ptr; | |
1387 | ||
1388 | if (!hs_req) { | |
1389 | u32 epctl = readl(hsotg->regs + S3C_DOEPCTL(ep_idx)); | |
1390 | int ptr; | |
1391 | ||
1392 | dev_warn(hsotg->dev, | |
1393 | "%s: FIFO %d bytes on ep%d but no req (DxEPCTl=0x%08x)\n", | |
1394 | __func__, size, ep_idx, epctl); | |
1395 | ||
1396 | /* dump the data from the FIFO, we've nothing we can do */ | |
1397 | for (ptr = 0; ptr < size; ptr += 4) | |
1398 | (void)readl(fifo); | |
1399 | ||
1400 | return; | |
1401 | } | |
1402 | ||
1403 | spin_lock(&hs_ep->lock); | |
1404 | ||
1405 | to_read = size; | |
1406 | read_ptr = hs_req->req.actual; | |
1407 | max_req = hs_req->req.length - read_ptr; | |
1408 | ||
a33e7136 BD |
1409 | dev_dbg(hsotg->dev, "%s: read %d/%d, done %d/%d\n", |
1410 | __func__, to_read, max_req, read_ptr, hs_req->req.length); | |
1411 | ||
5b7d70c6 BD |
1412 | if (to_read > max_req) { |
1413 | /* more data appeared than we where willing | |
1414 | * to deal with in this request. | |
1415 | */ | |
1416 | ||
1417 | /* currently we don't deal this */ | |
1418 | WARN_ON_ONCE(1); | |
1419 | } | |
1420 | ||
5b7d70c6 BD |
1421 | hs_ep->total_data += to_read; |
1422 | hs_req->req.actual += to_read; | |
1423 | to_read = DIV_ROUND_UP(to_read, 4); | |
1424 | ||
1425 | /* note, we might over-write the buffer end by 3 bytes depending on | |
1426 | * alignment of the data. */ | |
1427 | readsl(fifo, hs_req->req.buf + read_ptr, to_read); | |
1428 | ||
1429 | spin_unlock(&hs_ep->lock); | |
1430 | } | |
1431 | ||
1432 | /** | |
1433 | * s3c_hsotg_send_zlp - send zero-length packet on control endpoint | |
1434 | * @hsotg: The device instance | |
1435 | * @req: The request currently on this endpoint | |
1436 | * | |
1437 | * Generate a zero-length IN packet request for terminating a SETUP | |
1438 | * transaction. | |
1439 | * | |
1440 | * Note, since we don't write any data to the TxFIFO, then it is | |
25985edc | 1441 | * currently believed that we do not need to wait for any space in |
5b7d70c6 BD |
1442 | * the TxFIFO. |
1443 | */ | |
1444 | static void s3c_hsotg_send_zlp(struct s3c_hsotg *hsotg, | |
1445 | struct s3c_hsotg_req *req) | |
1446 | { | |
1447 | u32 ctrl; | |
1448 | ||
1449 | if (!req) { | |
1450 | dev_warn(hsotg->dev, "%s: no request?\n", __func__); | |
1451 | return; | |
1452 | } | |
1453 | ||
1454 | if (req->req.length == 0) { | |
1455 | hsotg->eps[0].sent_zlp = 1; | |
1456 | s3c_hsotg_enqueue_setup(hsotg); | |
1457 | return; | |
1458 | } | |
1459 | ||
1460 | hsotg->eps[0].dir_in = 1; | |
1461 | hsotg->eps[0].sent_zlp = 1; | |
1462 | ||
1463 | dev_dbg(hsotg->dev, "sending zero-length packet\n"); | |
1464 | ||
1465 | /* issue a zero-sized packet to terminate this */ | |
1466 | writel(S3C_DxEPTSIZ_MC(1) | S3C_DxEPTSIZ_PktCnt(1) | | |
1467 | S3C_DxEPTSIZ_XferSize(0), hsotg->regs + S3C_DIEPTSIZ(0)); | |
1468 | ||
1469 | ctrl = readl(hsotg->regs + S3C_DIEPCTL0); | |
1470 | ctrl |= S3C_DxEPCTL_CNAK; /* clear NAK set by core */ | |
1471 | ctrl |= S3C_DxEPCTL_EPEna; /* ensure ep enabled */ | |
1472 | ctrl |= S3C_DxEPCTL_USBActEp; | |
1473 | writel(ctrl, hsotg->regs + S3C_DIEPCTL0); | |
1474 | } | |
1475 | ||
1476 | /** | |
1477 | * s3c_hsotg_handle_outdone - handle receiving OutDone/SetupDone from RXFIFO | |
1478 | * @hsotg: The device instance | |
1479 | * @epnum: The endpoint received from | |
1480 | * @was_setup: Set if processing a SetupDone event. | |
1481 | * | |
1482 | * The RXFIFO has delivered an OutDone event, which means that the data | |
1483 | * transfer for an OUT endpoint has been completed, either by a short | |
1484 | * packet or by the finish of a transfer. | |
1485 | */ | |
1486 | static void s3c_hsotg_handle_outdone(struct s3c_hsotg *hsotg, | |
1487 | int epnum, bool was_setup) | |
1488 | { | |
a33e7136 | 1489 | u32 epsize = readl(hsotg->regs + S3C_DOEPTSIZ(epnum)); |
5b7d70c6 BD |
1490 | struct s3c_hsotg_ep *hs_ep = &hsotg->eps[epnum]; |
1491 | struct s3c_hsotg_req *hs_req = hs_ep->req; | |
1492 | struct usb_request *req = &hs_req->req; | |
a33e7136 | 1493 | unsigned size_left = S3C_DxEPTSIZ_XferSize_GET(epsize); |
5b7d70c6 BD |
1494 | int result = 0; |
1495 | ||
1496 | if (!hs_req) { | |
1497 | dev_dbg(hsotg->dev, "%s: no request active\n", __func__); | |
1498 | return; | |
1499 | } | |
1500 | ||
1501 | if (using_dma(hsotg)) { | |
5b7d70c6 | 1502 | unsigned size_done; |
5b7d70c6 BD |
1503 | |
1504 | /* Calculate the size of the transfer by checking how much | |
1505 | * is left in the endpoint size register and then working it | |
1506 | * out from the amount we loaded for the transfer. | |
1507 | * | |
1508 | * We need to do this as DMA pointers are always 32bit aligned | |
1509 | * so may overshoot/undershoot the transfer. | |
1510 | */ | |
1511 | ||
5b7d70c6 BD |
1512 | size_done = hs_ep->size_loaded - size_left; |
1513 | size_done += hs_ep->last_load; | |
1514 | ||
1515 | req->actual = size_done; | |
1516 | } | |
1517 | ||
a33e7136 BD |
1518 | /* if there is more request to do, schedule new transfer */ |
1519 | if (req->actual < req->length && size_left == 0) { | |
1520 | s3c_hsotg_start_req(hsotg, hs_ep, hs_req, true); | |
1521 | return; | |
1522 | } | |
1523 | ||
5b7d70c6 BD |
1524 | if (req->actual < req->length && req->short_not_ok) { |
1525 | dev_dbg(hsotg->dev, "%s: got %d/%d (short not ok) => error\n", | |
1526 | __func__, req->actual, req->length); | |
1527 | ||
1528 | /* todo - what should we return here? there's no one else | |
1529 | * even bothering to check the status. */ | |
1530 | } | |
1531 | ||
1532 | if (epnum == 0) { | |
1533 | if (!was_setup && req->complete != s3c_hsotg_complete_setup) | |
1534 | s3c_hsotg_send_zlp(hsotg, hs_req); | |
1535 | } | |
1536 | ||
1537 | s3c_hsotg_complete_request_lock(hsotg, hs_ep, hs_req, result); | |
1538 | } | |
1539 | ||
1540 | /** | |
1541 | * s3c_hsotg_read_frameno - read current frame number | |
1542 | * @hsotg: The device instance | |
1543 | * | |
1544 | * Return the current frame number | |
1545 | */ | |
1546 | static u32 s3c_hsotg_read_frameno(struct s3c_hsotg *hsotg) | |
1547 | { | |
1548 | u32 dsts; | |
1549 | ||
1550 | dsts = readl(hsotg->regs + S3C_DSTS); | |
1551 | dsts &= S3C_DSTS_SOFFN_MASK; | |
1552 | dsts >>= S3C_DSTS_SOFFN_SHIFT; | |
1553 | ||
1554 | return dsts; | |
1555 | } | |
1556 | ||
1557 | /** | |
1558 | * s3c_hsotg_handle_rx - RX FIFO has data | |
1559 | * @hsotg: The device instance | |
1560 | * | |
1561 | * The IRQ handler has detected that the RX FIFO has some data in it | |
1562 | * that requires processing, so find out what is in there and do the | |
1563 | * appropriate read. | |
1564 | * | |
25985edc | 1565 | * The RXFIFO is a true FIFO, the packets coming out are still in packet |
5b7d70c6 BD |
1566 | * chunks, so if you have x packets received on an endpoint you'll get x |
1567 | * FIFO events delivered, each with a packet's worth of data in it. | |
1568 | * | |
1569 | * When using DMA, we should not be processing events from the RXFIFO | |
1570 | * as the actual data should be sent to the memory directly and we turn | |
1571 | * on the completion interrupts to get notifications of transfer completion. | |
1572 | */ | |
0978f8c5 | 1573 | static void s3c_hsotg_handle_rx(struct s3c_hsotg *hsotg) |
5b7d70c6 BD |
1574 | { |
1575 | u32 grxstsr = readl(hsotg->regs + S3C_GRXSTSP); | |
1576 | u32 epnum, status, size; | |
1577 | ||
1578 | WARN_ON(using_dma(hsotg)); | |
1579 | ||
1580 | epnum = grxstsr & S3C_GRXSTS_EPNum_MASK; | |
1581 | status = grxstsr & S3C_GRXSTS_PktSts_MASK; | |
1582 | ||
1583 | size = grxstsr & S3C_GRXSTS_ByteCnt_MASK; | |
1584 | size >>= S3C_GRXSTS_ByteCnt_SHIFT; | |
1585 | ||
1586 | if (1) | |
1587 | dev_dbg(hsotg->dev, "%s: GRXSTSP=0x%08x (%d@%d)\n", | |
1588 | __func__, grxstsr, size, epnum); | |
1589 | ||
1590 | #define __status(x) ((x) >> S3C_GRXSTS_PktSts_SHIFT) | |
1591 | ||
1592 | switch (status >> S3C_GRXSTS_PktSts_SHIFT) { | |
1593 | case __status(S3C_GRXSTS_PktSts_GlobalOutNAK): | |
1594 | dev_dbg(hsotg->dev, "GlobalOutNAK\n"); | |
1595 | break; | |
1596 | ||
1597 | case __status(S3C_GRXSTS_PktSts_OutDone): | |
1598 | dev_dbg(hsotg->dev, "OutDone (Frame=0x%08x)\n", | |
1599 | s3c_hsotg_read_frameno(hsotg)); | |
1600 | ||
1601 | if (!using_dma(hsotg)) | |
1602 | s3c_hsotg_handle_outdone(hsotg, epnum, false); | |
1603 | break; | |
1604 | ||
1605 | case __status(S3C_GRXSTS_PktSts_SetupDone): | |
1606 | dev_dbg(hsotg->dev, | |
1607 | "SetupDone (Frame=0x%08x, DOPEPCTL=0x%08x)\n", | |
1608 | s3c_hsotg_read_frameno(hsotg), | |
1609 | readl(hsotg->regs + S3C_DOEPCTL(0))); | |
1610 | ||
1611 | s3c_hsotg_handle_outdone(hsotg, epnum, true); | |
1612 | break; | |
1613 | ||
1614 | case __status(S3C_GRXSTS_PktSts_OutRX): | |
1615 | s3c_hsotg_rx_data(hsotg, epnum, size); | |
1616 | break; | |
1617 | ||
1618 | case __status(S3C_GRXSTS_PktSts_SetupRX): | |
1619 | dev_dbg(hsotg->dev, | |
1620 | "SetupRX (Frame=0x%08x, DOPEPCTL=0x%08x)\n", | |
1621 | s3c_hsotg_read_frameno(hsotg), | |
1622 | readl(hsotg->regs + S3C_DOEPCTL(0))); | |
1623 | ||
1624 | s3c_hsotg_rx_data(hsotg, epnum, size); | |
1625 | break; | |
1626 | ||
1627 | default: | |
1628 | dev_warn(hsotg->dev, "%s: unknown status %08x\n", | |
1629 | __func__, grxstsr); | |
1630 | ||
1631 | s3c_hsotg_dump(hsotg); | |
1632 | break; | |
1633 | } | |
1634 | } | |
1635 | ||
1636 | /** | |
1637 | * s3c_hsotg_ep0_mps - turn max packet size into register setting | |
1638 | * @mps: The maximum packet size in bytes. | |
1639 | */ | |
1640 | static u32 s3c_hsotg_ep0_mps(unsigned int mps) | |
1641 | { | |
1642 | switch (mps) { | |
1643 | case 64: | |
1644 | return S3C_D0EPCTL_MPS_64; | |
1645 | case 32: | |
1646 | return S3C_D0EPCTL_MPS_32; | |
1647 | case 16: | |
1648 | return S3C_D0EPCTL_MPS_16; | |
1649 | case 8: | |
1650 | return S3C_D0EPCTL_MPS_8; | |
1651 | } | |
1652 | ||
1653 | /* bad max packet size, warn and return invalid result */ | |
1654 | WARN_ON(1); | |
1655 | return (u32)-1; | |
1656 | } | |
1657 | ||
1658 | /** | |
1659 | * s3c_hsotg_set_ep_maxpacket - set endpoint's max-packet field | |
1660 | * @hsotg: The driver state. | |
1661 | * @ep: The index number of the endpoint | |
1662 | * @mps: The maximum packet size in bytes | |
1663 | * | |
1664 | * Configure the maximum packet size for the given endpoint, updating | |
1665 | * the hardware control registers to reflect this. | |
1666 | */ | |
1667 | static void s3c_hsotg_set_ep_maxpacket(struct s3c_hsotg *hsotg, | |
1668 | unsigned int ep, unsigned int mps) | |
1669 | { | |
1670 | struct s3c_hsotg_ep *hs_ep = &hsotg->eps[ep]; | |
1671 | void __iomem *regs = hsotg->regs; | |
1672 | u32 mpsval; | |
1673 | u32 reg; | |
1674 | ||
1675 | if (ep == 0) { | |
1676 | /* EP0 is a special case */ | |
1677 | mpsval = s3c_hsotg_ep0_mps(mps); | |
1678 | if (mpsval > 3) | |
1679 | goto bad_mps; | |
1680 | } else { | |
1681 | if (mps >= S3C_DxEPCTL_MPS_LIMIT+1) | |
1682 | goto bad_mps; | |
1683 | ||
1684 | mpsval = mps; | |
1685 | } | |
1686 | ||
1687 | hs_ep->ep.maxpacket = mps; | |
1688 | ||
1689 | /* update both the in and out endpoint controldir_ registers, even | |
1690 | * if one of the directions may not be in use. */ | |
1691 | ||
1692 | reg = readl(regs + S3C_DIEPCTL(ep)); | |
1693 | reg &= ~S3C_DxEPCTL_MPS_MASK; | |
1694 | reg |= mpsval; | |
1695 | writel(reg, regs + S3C_DIEPCTL(ep)); | |
1696 | ||
1697 | reg = readl(regs + S3C_DOEPCTL(ep)); | |
1698 | reg &= ~S3C_DxEPCTL_MPS_MASK; | |
1699 | reg |= mpsval; | |
1700 | writel(reg, regs + S3C_DOEPCTL(ep)); | |
1701 | ||
1702 | return; | |
1703 | ||
1704 | bad_mps: | |
1705 | dev_err(hsotg->dev, "ep%d: bad mps of %d\n", ep, mps); | |
1706 | } | |
1707 | ||
9c39ddc6 AT |
1708 | /** |
1709 | * s3c_hsotg_txfifo_flush - flush Tx FIFO | |
1710 | * @hsotg: The driver state | |
1711 | * @idx: The index for the endpoint (0..15) | |
1712 | */ | |
1713 | static void s3c_hsotg_txfifo_flush(struct s3c_hsotg *hsotg, unsigned int idx) | |
1714 | { | |
1715 | int timeout; | |
1716 | int val; | |
1717 | ||
1718 | writel(S3C_GRSTCTL_TxFNum(idx) | S3C_GRSTCTL_TxFFlsh, | |
1719 | hsotg->regs + S3C_GRSTCTL); | |
1720 | ||
1721 | /* wait until the fifo is flushed */ | |
1722 | timeout = 100; | |
1723 | ||
1724 | while (1) { | |
1725 | val = readl(hsotg->regs + S3C_GRSTCTL); | |
1726 | ||
1727 | if ((val & (S3C_GRSTCTL_TxFFlsh)) == 0) | |
1728 | break; | |
1729 | ||
1730 | if (--timeout == 0) { | |
1731 | dev_err(hsotg->dev, | |
1732 | "%s: timeout flushing fifo (GRSTCTL=%08x)\n", | |
1733 | __func__, val); | |
1734 | } | |
1735 | ||
1736 | udelay(1); | |
1737 | } | |
1738 | } | |
5b7d70c6 BD |
1739 | |
1740 | /** | |
1741 | * s3c_hsotg_trytx - check to see if anything needs transmitting | |
1742 | * @hsotg: The driver state | |
1743 | * @hs_ep: The driver endpoint to check. | |
1744 | * | |
1745 | * Check to see if there is a request that has data to send, and if so | |
1746 | * make an attempt to write data into the FIFO. | |
1747 | */ | |
1748 | static int s3c_hsotg_trytx(struct s3c_hsotg *hsotg, | |
1749 | struct s3c_hsotg_ep *hs_ep) | |
1750 | { | |
1751 | struct s3c_hsotg_req *hs_req = hs_ep->req; | |
1752 | ||
1753 | if (!hs_ep->dir_in || !hs_req) | |
1754 | return 0; | |
1755 | ||
1756 | if (hs_req->req.actual < hs_req->req.length) { | |
1757 | dev_dbg(hsotg->dev, "trying to write more for ep%d\n", | |
1758 | hs_ep->index); | |
1759 | return s3c_hsotg_write_fifo(hsotg, hs_ep, hs_req); | |
1760 | } | |
1761 | ||
1762 | return 0; | |
1763 | } | |
1764 | ||
1765 | /** | |
1766 | * s3c_hsotg_complete_in - complete IN transfer | |
1767 | * @hsotg: The device state. | |
1768 | * @hs_ep: The endpoint that has just completed. | |
1769 | * | |
1770 | * An IN transfer has been completed, update the transfer's state and then | |
1771 | * call the relevant completion routines. | |
1772 | */ | |
1773 | static void s3c_hsotg_complete_in(struct s3c_hsotg *hsotg, | |
1774 | struct s3c_hsotg_ep *hs_ep) | |
1775 | { | |
1776 | struct s3c_hsotg_req *hs_req = hs_ep->req; | |
1777 | u32 epsize = readl(hsotg->regs + S3C_DIEPTSIZ(hs_ep->index)); | |
1778 | int size_left, size_done; | |
1779 | ||
1780 | if (!hs_req) { | |
1781 | dev_dbg(hsotg->dev, "XferCompl but no req\n"); | |
1782 | return; | |
1783 | } | |
1784 | ||
1785 | /* Calculate the size of the transfer by checking how much is left | |
1786 | * in the endpoint size register and then working it out from | |
1787 | * the amount we loaded for the transfer. | |
1788 | * | |
1789 | * We do this even for DMA, as the transfer may have incremented | |
1790 | * past the end of the buffer (DMA transfers are always 32bit | |
1791 | * aligned). | |
1792 | */ | |
1793 | ||
1794 | size_left = S3C_DxEPTSIZ_XferSize_GET(epsize); | |
1795 | ||
1796 | size_done = hs_ep->size_loaded - size_left; | |
1797 | size_done += hs_ep->last_load; | |
1798 | ||
1799 | if (hs_req->req.actual != size_done) | |
1800 | dev_dbg(hsotg->dev, "%s: adjusting size done %d => %d\n", | |
1801 | __func__, hs_req->req.actual, size_done); | |
1802 | ||
1803 | hs_req->req.actual = size_done; | |
1804 | ||
1805 | /* if we did all of the transfer, and there is more data left | |
1806 | * around, then try restarting the rest of the request */ | |
1807 | ||
1808 | if (!size_left && hs_req->req.actual < hs_req->req.length) { | |
1809 | dev_dbg(hsotg->dev, "%s trying more for req...\n", __func__); | |
1810 | s3c_hsotg_start_req(hsotg, hs_ep, hs_req, true); | |
1811 | } else | |
1812 | s3c_hsotg_complete_request_lock(hsotg, hs_ep, hs_req, 0); | |
1813 | } | |
1814 | ||
1815 | /** | |
1816 | * s3c_hsotg_epint - handle an in/out endpoint interrupt | |
1817 | * @hsotg: The driver state | |
1818 | * @idx: The index for the endpoint (0..15) | |
1819 | * @dir_in: Set if this is an IN endpoint | |
1820 | * | |
1821 | * Process and clear any interrupt pending for an individual endpoint | |
1822 | */ | |
1823 | static void s3c_hsotg_epint(struct s3c_hsotg *hsotg, unsigned int idx, | |
1824 | int dir_in) | |
1825 | { | |
1826 | struct s3c_hsotg_ep *hs_ep = &hsotg->eps[idx]; | |
1827 | u32 epint_reg = dir_in ? S3C_DIEPINT(idx) : S3C_DOEPINT(idx); | |
1828 | u32 epctl_reg = dir_in ? S3C_DIEPCTL(idx) : S3C_DOEPCTL(idx); | |
1829 | u32 epsiz_reg = dir_in ? S3C_DIEPTSIZ(idx) : S3C_DOEPTSIZ(idx); | |
1830 | u32 ints; | |
5b7d70c6 BD |
1831 | |
1832 | ints = readl(hsotg->regs + epint_reg); | |
1833 | ||
a3395f0d AT |
1834 | /* Clear endpoint interrupts */ |
1835 | writel(ints, hsotg->regs + epint_reg); | |
1836 | ||
5b7d70c6 BD |
1837 | dev_dbg(hsotg->dev, "%s: ep%d(%s) DxEPINT=0x%08x\n", |
1838 | __func__, idx, dir_in ? "in" : "out", ints); | |
1839 | ||
1840 | if (ints & S3C_DxEPINT_XferCompl) { | |
1841 | dev_dbg(hsotg->dev, | |
1842 | "%s: XferCompl: DxEPCTL=0x%08x, DxEPTSIZ=%08x\n", | |
1843 | __func__, readl(hsotg->regs + epctl_reg), | |
1844 | readl(hsotg->regs + epsiz_reg)); | |
1845 | ||
1846 | /* we get OutDone from the FIFO, so we only need to look | |
1847 | * at completing IN requests here */ | |
1848 | if (dir_in) { | |
1849 | s3c_hsotg_complete_in(hsotg, hs_ep); | |
1850 | ||
c9a64ea8 | 1851 | if (idx == 0 && !hs_ep->req) |
5b7d70c6 BD |
1852 | s3c_hsotg_enqueue_setup(hsotg); |
1853 | } else if (using_dma(hsotg)) { | |
1854 | /* We're using DMA, we need to fire an OutDone here | |
1855 | * as we ignore the RXFIFO. */ | |
1856 | ||
1857 | s3c_hsotg_handle_outdone(hsotg, idx, false); | |
1858 | } | |
5b7d70c6 BD |
1859 | } |
1860 | ||
9c39ddc6 | 1861 | if (ints & S3C_DxEPINT_EPDisbld) { |
5b7d70c6 | 1862 | dev_dbg(hsotg->dev, "%s: EPDisbld\n", __func__); |
5b7d70c6 | 1863 | |
9c39ddc6 AT |
1864 | if (dir_in) { |
1865 | int epctl = readl(hsotg->regs + epctl_reg); | |
1866 | ||
1867 | s3c_hsotg_txfifo_flush(hsotg, idx); | |
1868 | ||
1869 | if ((epctl & S3C_DxEPCTL_Stall) && | |
1870 | (epctl & S3C_DxEPCTL_EPType_Bulk)) { | |
1871 | int dctl = readl(hsotg->regs + S3C_DCTL); | |
1872 | ||
1873 | dctl |= S3C_DCTL_CGNPInNAK; | |
1874 | writel(dctl, hsotg->regs + S3C_DCTL); | |
1875 | } | |
1876 | } | |
1877 | } | |
1878 | ||
a3395f0d | 1879 | if (ints & S3C_DxEPINT_AHBErr) |
5b7d70c6 | 1880 | dev_dbg(hsotg->dev, "%s: AHBErr\n", __func__); |
5b7d70c6 BD |
1881 | |
1882 | if (ints & S3C_DxEPINT_Setup) { /* Setup or Timeout */ | |
1883 | dev_dbg(hsotg->dev, "%s: Setup/Timeout\n", __func__); | |
1884 | ||
1885 | if (using_dma(hsotg) && idx == 0) { | |
1886 | /* this is the notification we've received a | |
1887 | * setup packet. In non-DMA mode we'd get this | |
1888 | * from the RXFIFO, instead we need to process | |
1889 | * the setup here. */ | |
1890 | ||
1891 | if (dir_in) | |
1892 | WARN_ON_ONCE(1); | |
1893 | else | |
1894 | s3c_hsotg_handle_outdone(hsotg, 0, true); | |
1895 | } | |
5b7d70c6 BD |
1896 | } |
1897 | ||
a3395f0d | 1898 | if (ints & S3C_DxEPINT_Back2BackSetup) |
5b7d70c6 | 1899 | dev_dbg(hsotg->dev, "%s: B2BSetup/INEPNakEff\n", __func__); |
5b7d70c6 BD |
1900 | |
1901 | if (dir_in) { | |
1902 | /* not sure if this is important, but we'll clear it anyway | |
1903 | */ | |
1904 | if (ints & S3C_DIEPMSK_INTknTXFEmpMsk) { | |
1905 | dev_dbg(hsotg->dev, "%s: ep%d: INTknTXFEmpMsk\n", | |
1906 | __func__, idx); | |
5b7d70c6 BD |
1907 | } |
1908 | ||
1909 | /* this probably means something bad is happening */ | |
1910 | if (ints & S3C_DIEPMSK_INTknEPMisMsk) { | |
1911 | dev_warn(hsotg->dev, "%s: ep%d: INTknEP\n", | |
1912 | __func__, idx); | |
5b7d70c6 | 1913 | } |
10aebc77 BD |
1914 | |
1915 | /* FIFO has space or is empty (see GAHBCFG) */ | |
1916 | if (hsotg->dedicated_fifos && | |
1917 | ints & S3C_DIEPMSK_TxFIFOEmpty) { | |
1918 | dev_dbg(hsotg->dev, "%s: ep%d: TxFIFOEmpty\n", | |
1919 | __func__, idx); | |
1920 | s3c_hsotg_trytx(hsotg, hs_ep); | |
10aebc77 | 1921 | } |
5b7d70c6 | 1922 | } |
5b7d70c6 BD |
1923 | } |
1924 | ||
1925 | /** | |
1926 | * s3c_hsotg_irq_enumdone - Handle EnumDone interrupt (enumeration done) | |
1927 | * @hsotg: The device state. | |
1928 | * | |
1929 | * Handle updating the device settings after the enumeration phase has | |
1930 | * been completed. | |
1931 | */ | |
1932 | static void s3c_hsotg_irq_enumdone(struct s3c_hsotg *hsotg) | |
1933 | { | |
1934 | u32 dsts = readl(hsotg->regs + S3C_DSTS); | |
1935 | int ep0_mps = 0, ep_mps; | |
1936 | ||
1937 | /* This should signal the finish of the enumeration phase | |
1938 | * of the USB handshaking, so we should now know what rate | |
1939 | * we connected at. */ | |
1940 | ||
1941 | dev_dbg(hsotg->dev, "EnumDone (DSTS=0x%08x)\n", dsts); | |
1942 | ||
1943 | /* note, since we're limited by the size of transfer on EP0, and | |
1944 | * it seems IN transfers must be a even number of packets we do | |
1945 | * not advertise a 64byte MPS on EP0. */ | |
1946 | ||
1947 | /* catch both EnumSpd_FS and EnumSpd_FS48 */ | |
1948 | switch (dsts & S3C_DSTS_EnumSpd_MASK) { | |
1949 | case S3C_DSTS_EnumSpd_FS: | |
1950 | case S3C_DSTS_EnumSpd_FS48: | |
1951 | hsotg->gadget.speed = USB_SPEED_FULL; | |
1952 | dev_info(hsotg->dev, "new device is full-speed\n"); | |
1953 | ||
1954 | ep0_mps = EP0_MPS_LIMIT; | |
1955 | ep_mps = 64; | |
1956 | break; | |
1957 | ||
1958 | case S3C_DSTS_EnumSpd_HS: | |
1959 | dev_info(hsotg->dev, "new device is high-speed\n"); | |
1960 | hsotg->gadget.speed = USB_SPEED_HIGH; | |
1961 | ||
1962 | ep0_mps = EP0_MPS_LIMIT; | |
1963 | ep_mps = 512; | |
1964 | break; | |
1965 | ||
1966 | case S3C_DSTS_EnumSpd_LS: | |
1967 | hsotg->gadget.speed = USB_SPEED_LOW; | |
1968 | dev_info(hsotg->dev, "new device is low-speed\n"); | |
1969 | ||
1970 | /* note, we don't actually support LS in this driver at the | |
1971 | * moment, and the documentation seems to imply that it isn't | |
1972 | * supported by the PHYs on some of the devices. | |
1973 | */ | |
1974 | break; | |
1975 | } | |
1976 | ||
1977 | /* we should now know the maximum packet size for an | |
1978 | * endpoint, so set the endpoints to a default value. */ | |
1979 | ||
1980 | if (ep0_mps) { | |
1981 | int i; | |
1982 | s3c_hsotg_set_ep_maxpacket(hsotg, 0, ep0_mps); | |
1983 | for (i = 1; i < S3C_HSOTG_EPS; i++) | |
1984 | s3c_hsotg_set_ep_maxpacket(hsotg, i, ep_mps); | |
1985 | } | |
1986 | ||
1987 | /* ensure after enumeration our EP0 is active */ | |
1988 | ||
1989 | s3c_hsotg_enqueue_setup(hsotg); | |
1990 | ||
1991 | dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", | |
1992 | readl(hsotg->regs + S3C_DIEPCTL0), | |
1993 | readl(hsotg->regs + S3C_DOEPCTL0)); | |
1994 | } | |
1995 | ||
1996 | /** | |
1997 | * kill_all_requests - remove all requests from the endpoint's queue | |
1998 | * @hsotg: The device state. | |
1999 | * @ep: The endpoint the requests may be on. | |
2000 | * @result: The result code to use. | |
2001 | * @force: Force removal of any current requests | |
2002 | * | |
2003 | * Go through the requests on the given endpoint and mark them | |
2004 | * completed with the given result code. | |
2005 | */ | |
2006 | static void kill_all_requests(struct s3c_hsotg *hsotg, | |
2007 | struct s3c_hsotg_ep *ep, | |
2008 | int result, bool force) | |
2009 | { | |
2010 | struct s3c_hsotg_req *req, *treq; | |
2011 | unsigned long flags; | |
2012 | ||
2013 | spin_lock_irqsave(&ep->lock, flags); | |
2014 | ||
2015 | list_for_each_entry_safe(req, treq, &ep->queue, queue) { | |
2016 | /* currently, we can't do much about an already | |
2017 | * running request on an in endpoint */ | |
2018 | ||
2019 | if (ep->req == req && ep->dir_in && !force) | |
2020 | continue; | |
2021 | ||
2022 | s3c_hsotg_complete_request(hsotg, ep, req, | |
2023 | result); | |
2024 | } | |
2025 | ||
2026 | spin_unlock_irqrestore(&ep->lock, flags); | |
2027 | } | |
2028 | ||
2029 | #define call_gadget(_hs, _entry) \ | |
2030 | if ((_hs)->gadget.speed != USB_SPEED_UNKNOWN && \ | |
2031 | (_hs)->driver && (_hs)->driver->_entry) \ | |
2032 | (_hs)->driver->_entry(&(_hs)->gadget); | |
2033 | ||
2034 | /** | |
2035 | * s3c_hsotg_disconnect_irq - disconnect irq service | |
2036 | * @hsotg: The device state. | |
2037 | * | |
2038 | * A disconnect IRQ has been received, meaning that the host has | |
2039 | * lost contact with the bus. Remove all current transactions | |
2040 | * and signal the gadget driver that this has happened. | |
2041 | */ | |
2042 | static void s3c_hsotg_disconnect_irq(struct s3c_hsotg *hsotg) | |
2043 | { | |
2044 | unsigned ep; | |
2045 | ||
2046 | for (ep = 0; ep < S3C_HSOTG_EPS; ep++) | |
2047 | kill_all_requests(hsotg, &hsotg->eps[ep], -ESHUTDOWN, true); | |
2048 | ||
2049 | call_gadget(hsotg, disconnect); | |
2050 | } | |
2051 | ||
2052 | /** | |
2053 | * s3c_hsotg_irq_fifoempty - TX FIFO empty interrupt handler | |
2054 | * @hsotg: The device state: | |
2055 | * @periodic: True if this is a periodic FIFO interrupt | |
2056 | */ | |
2057 | static void s3c_hsotg_irq_fifoempty(struct s3c_hsotg *hsotg, bool periodic) | |
2058 | { | |
2059 | struct s3c_hsotg_ep *ep; | |
2060 | int epno, ret; | |
2061 | ||
2062 | /* look through for any more data to transmit */ | |
2063 | ||
2064 | for (epno = 0; epno < S3C_HSOTG_EPS; epno++) { | |
2065 | ep = &hsotg->eps[epno]; | |
2066 | ||
2067 | if (!ep->dir_in) | |
2068 | continue; | |
2069 | ||
2070 | if ((periodic && !ep->periodic) || | |
2071 | (!periodic && ep->periodic)) | |
2072 | continue; | |
2073 | ||
2074 | ret = s3c_hsotg_trytx(hsotg, ep); | |
2075 | if (ret < 0) | |
2076 | break; | |
2077 | } | |
2078 | } | |
2079 | ||
2080 | static struct s3c_hsotg *our_hsotg; | |
2081 | ||
2082 | /* IRQ flags which will trigger a retry around the IRQ loop */ | |
2083 | #define IRQ_RETRY_MASK (S3C_GINTSTS_NPTxFEmp | \ | |
2084 | S3C_GINTSTS_PTxFEmp | \ | |
2085 | S3C_GINTSTS_RxFLvl) | |
2086 | ||
2087 | /** | |
2088 | * s3c_hsotg_irq - handle device interrupt | |
2089 | * @irq: The IRQ number triggered | |
2090 | * @pw: The pw value when registered the handler. | |
2091 | */ | |
2092 | static irqreturn_t s3c_hsotg_irq(int irq, void *pw) | |
2093 | { | |
2094 | struct s3c_hsotg *hsotg = pw; | |
2095 | int retry_count = 8; | |
2096 | u32 gintsts; | |
2097 | u32 gintmsk; | |
2098 | ||
2099 | irq_retry: | |
2100 | gintsts = readl(hsotg->regs + S3C_GINTSTS); | |
2101 | gintmsk = readl(hsotg->regs + S3C_GINTMSK); | |
2102 | ||
2103 | dev_dbg(hsotg->dev, "%s: %08x %08x (%08x) retry %d\n", | |
2104 | __func__, gintsts, gintsts & gintmsk, gintmsk, retry_count); | |
2105 | ||
2106 | gintsts &= gintmsk; | |
2107 | ||
2108 | if (gintsts & S3C_GINTSTS_OTGInt) { | |
2109 | u32 otgint = readl(hsotg->regs + S3C_GOTGINT); | |
2110 | ||
2111 | dev_info(hsotg->dev, "OTGInt: %08x\n", otgint); | |
2112 | ||
2113 | writel(otgint, hsotg->regs + S3C_GOTGINT); | |
5b7d70c6 BD |
2114 | } |
2115 | ||
2116 | if (gintsts & S3C_GINTSTS_DisconnInt) { | |
2117 | dev_dbg(hsotg->dev, "%s: DisconnInt\n", __func__); | |
2118 | writel(S3C_GINTSTS_DisconnInt, hsotg->regs + S3C_GINTSTS); | |
2119 | ||
2120 | s3c_hsotg_disconnect_irq(hsotg); | |
2121 | } | |
2122 | ||
2123 | if (gintsts & S3C_GINTSTS_SessReqInt) { | |
2124 | dev_dbg(hsotg->dev, "%s: SessReqInt\n", __func__); | |
2125 | writel(S3C_GINTSTS_SessReqInt, hsotg->regs + S3C_GINTSTS); | |
2126 | } | |
2127 | ||
2128 | if (gintsts & S3C_GINTSTS_EnumDone) { | |
5b7d70c6 | 2129 | writel(S3C_GINTSTS_EnumDone, hsotg->regs + S3C_GINTSTS); |
a3395f0d AT |
2130 | |
2131 | s3c_hsotg_irq_enumdone(hsotg); | |
5b7d70c6 BD |
2132 | } |
2133 | ||
2134 | if (gintsts & S3C_GINTSTS_ConIDStsChng) { | |
2135 | dev_dbg(hsotg->dev, "ConIDStsChg (DSTS=0x%08x, GOTCTL=%08x)\n", | |
2136 | readl(hsotg->regs + S3C_DSTS), | |
2137 | readl(hsotg->regs + S3C_GOTGCTL)); | |
2138 | ||
2139 | writel(S3C_GINTSTS_ConIDStsChng, hsotg->regs + S3C_GINTSTS); | |
2140 | } | |
2141 | ||
2142 | if (gintsts & (S3C_GINTSTS_OEPInt | S3C_GINTSTS_IEPInt)) { | |
2143 | u32 daint = readl(hsotg->regs + S3C_DAINT); | |
2144 | u32 daint_out = daint >> S3C_DAINT_OutEP_SHIFT; | |
2145 | u32 daint_in = daint & ~(daint_out << S3C_DAINT_OutEP_SHIFT); | |
2146 | int ep; | |
2147 | ||
2148 | dev_dbg(hsotg->dev, "%s: daint=%08x\n", __func__, daint); | |
2149 | ||
2150 | for (ep = 0; ep < 15 && daint_out; ep++, daint_out >>= 1) { | |
2151 | if (daint_out & 1) | |
2152 | s3c_hsotg_epint(hsotg, ep, 0); | |
2153 | } | |
2154 | ||
2155 | for (ep = 0; ep < 15 && daint_in; ep++, daint_in >>= 1) { | |
2156 | if (daint_in & 1) | |
2157 | s3c_hsotg_epint(hsotg, ep, 1); | |
2158 | } | |
5b7d70c6 BD |
2159 | } |
2160 | ||
2161 | if (gintsts & S3C_GINTSTS_USBRst) { | |
2162 | dev_info(hsotg->dev, "%s: USBRst\n", __func__); | |
2163 | dev_dbg(hsotg->dev, "GNPTXSTS=%08x\n", | |
2164 | readl(hsotg->regs + S3C_GNPTXSTS)); | |
2165 | ||
a3395f0d AT |
2166 | writel(S3C_GINTSTS_USBRst, hsotg->regs + S3C_GINTSTS); |
2167 | ||
5b7d70c6 BD |
2168 | kill_all_requests(hsotg, &hsotg->eps[0], -ECONNRESET, true); |
2169 | ||
2170 | /* it seems after a reset we can end up with a situation | |
b3864ced BD |
2171 | * where the TXFIFO still has data in it... the docs |
2172 | * suggest resetting all the fifos, so use the init_fifo | |
2173 | * code to relayout and flush the fifos. | |
5b7d70c6 BD |
2174 | */ |
2175 | ||
b3864ced | 2176 | s3c_hsotg_init_fifo(hsotg); |
5b7d70c6 BD |
2177 | |
2178 | s3c_hsotg_enqueue_setup(hsotg); | |
5b7d70c6 BD |
2179 | } |
2180 | ||
2181 | /* check both FIFOs */ | |
2182 | ||
2183 | if (gintsts & S3C_GINTSTS_NPTxFEmp) { | |
2184 | dev_dbg(hsotg->dev, "NPTxFEmp\n"); | |
2185 | ||
2186 | /* Disable the interrupt to stop it happening again | |
2187 | * unless one of these endpoint routines decides that | |
2188 | * it needs re-enabling */ | |
2189 | ||
2190 | s3c_hsotg_disable_gsint(hsotg, S3C_GINTSTS_NPTxFEmp); | |
2191 | s3c_hsotg_irq_fifoempty(hsotg, false); | |
5b7d70c6 BD |
2192 | } |
2193 | ||
2194 | if (gintsts & S3C_GINTSTS_PTxFEmp) { | |
2195 | dev_dbg(hsotg->dev, "PTxFEmp\n"); | |
2196 | ||
2197 | /* See note in S3C_GINTSTS_NPTxFEmp */ | |
2198 | ||
2199 | s3c_hsotg_disable_gsint(hsotg, S3C_GINTSTS_PTxFEmp); | |
2200 | s3c_hsotg_irq_fifoempty(hsotg, true); | |
5b7d70c6 BD |
2201 | } |
2202 | ||
2203 | if (gintsts & S3C_GINTSTS_RxFLvl) { | |
2204 | /* note, since GINTSTS_RxFLvl doubles as FIFO-not-empty, | |
2205 | * we need to retry s3c_hsotg_handle_rx if this is still | |
2206 | * set. */ | |
2207 | ||
2208 | s3c_hsotg_handle_rx(hsotg); | |
5b7d70c6 BD |
2209 | } |
2210 | ||
2211 | if (gintsts & S3C_GINTSTS_ModeMis) { | |
2212 | dev_warn(hsotg->dev, "warning, mode mismatch triggered\n"); | |
2213 | writel(S3C_GINTSTS_ModeMis, hsotg->regs + S3C_GINTSTS); | |
2214 | } | |
2215 | ||
2216 | if (gintsts & S3C_GINTSTS_USBSusp) { | |
2217 | dev_info(hsotg->dev, "S3C_GINTSTS_USBSusp\n"); | |
2218 | writel(S3C_GINTSTS_USBSusp, hsotg->regs + S3C_GINTSTS); | |
2219 | ||
2220 | call_gadget(hsotg, suspend); | |
2221 | } | |
2222 | ||
2223 | if (gintsts & S3C_GINTSTS_WkUpInt) { | |
2224 | dev_info(hsotg->dev, "S3C_GINTSTS_WkUpIn\n"); | |
2225 | writel(S3C_GINTSTS_WkUpInt, hsotg->regs + S3C_GINTSTS); | |
2226 | ||
2227 | call_gadget(hsotg, resume); | |
2228 | } | |
2229 | ||
2230 | if (gintsts & S3C_GINTSTS_ErlySusp) { | |
2231 | dev_dbg(hsotg->dev, "S3C_GINTSTS_ErlySusp\n"); | |
2232 | writel(S3C_GINTSTS_ErlySusp, hsotg->regs + S3C_GINTSTS); | |
2233 | } | |
2234 | ||
2235 | /* these next two seem to crop-up occasionally causing the core | |
2236 | * to shutdown the USB transfer, so try clearing them and logging | |
25985edc | 2237 | * the occurrence. */ |
5b7d70c6 BD |
2238 | |
2239 | if (gintsts & S3C_GINTSTS_GOUTNakEff) { | |
2240 | dev_info(hsotg->dev, "GOUTNakEff triggered\n"); | |
2241 | ||
5b7d70c6 | 2242 | writel(S3C_DCTL_CGOUTNak, hsotg->regs + S3C_DCTL); |
a3395f0d AT |
2243 | |
2244 | s3c_hsotg_dump(hsotg); | |
5b7d70c6 BD |
2245 | } |
2246 | ||
2247 | if (gintsts & S3C_GINTSTS_GINNakEff) { | |
2248 | dev_info(hsotg->dev, "GINNakEff triggered\n"); | |
2249 | ||
5b7d70c6 | 2250 | writel(S3C_DCTL_CGNPInNAK, hsotg->regs + S3C_DCTL); |
a3395f0d AT |
2251 | |
2252 | s3c_hsotg_dump(hsotg); | |
5b7d70c6 BD |
2253 | } |
2254 | ||
2255 | /* if we've had fifo events, we should try and go around the | |
2256 | * loop again to see if there's any point in returning yet. */ | |
2257 | ||
2258 | if (gintsts & IRQ_RETRY_MASK && --retry_count > 0) | |
2259 | goto irq_retry; | |
2260 | ||
2261 | return IRQ_HANDLED; | |
2262 | } | |
2263 | ||
2264 | /** | |
2265 | * s3c_hsotg_ep_enable - enable the given endpoint | |
2266 | * @ep: The USB endpint to configure | |
2267 | * @desc: The USB endpoint descriptor to configure with. | |
2268 | * | |
2269 | * This is called from the USB gadget code's usb_ep_enable(). | |
2270 | */ | |
2271 | static int s3c_hsotg_ep_enable(struct usb_ep *ep, | |
2272 | const struct usb_endpoint_descriptor *desc) | |
2273 | { | |
2274 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
2275 | struct s3c_hsotg *hsotg = hs_ep->parent; | |
2276 | unsigned long flags; | |
2277 | int index = hs_ep->index; | |
2278 | u32 epctrl_reg; | |
2279 | u32 epctrl; | |
2280 | u32 mps; | |
2281 | int dir_in; | |
19c190f9 | 2282 | int ret = 0; |
5b7d70c6 BD |
2283 | |
2284 | dev_dbg(hsotg->dev, | |
2285 | "%s: ep %s: a 0x%02x, attr 0x%02x, mps 0x%04x, intr %d\n", | |
2286 | __func__, ep->name, desc->bEndpointAddress, desc->bmAttributes, | |
2287 | desc->wMaxPacketSize, desc->bInterval); | |
2288 | ||
2289 | /* not to be called for EP0 */ | |
2290 | WARN_ON(index == 0); | |
2291 | ||
2292 | dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0; | |
2293 | if (dir_in != hs_ep->dir_in) { | |
2294 | dev_err(hsotg->dev, "%s: direction mismatch!\n", __func__); | |
2295 | return -EINVAL; | |
2296 | } | |
2297 | ||
2298 | mps = le16_to_cpu(desc->wMaxPacketSize); | |
2299 | ||
2300 | /* note, we handle this here instead of s3c_hsotg_set_ep_maxpacket */ | |
2301 | ||
2302 | epctrl_reg = dir_in ? S3C_DIEPCTL(index) : S3C_DOEPCTL(index); | |
2303 | epctrl = readl(hsotg->regs + epctrl_reg); | |
2304 | ||
2305 | dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x from 0x%08x\n", | |
2306 | __func__, epctrl, epctrl_reg); | |
2307 | ||
2308 | spin_lock_irqsave(&hs_ep->lock, flags); | |
2309 | ||
2310 | epctrl &= ~(S3C_DxEPCTL_EPType_MASK | S3C_DxEPCTL_MPS_MASK); | |
2311 | epctrl |= S3C_DxEPCTL_MPS(mps); | |
2312 | ||
2313 | /* mark the endpoint as active, otherwise the core may ignore | |
2314 | * transactions entirely for this endpoint */ | |
2315 | epctrl |= S3C_DxEPCTL_USBActEp; | |
2316 | ||
2317 | /* set the NAK status on the endpoint, otherwise we might try and | |
2318 | * do something with data that we've yet got a request to process | |
2319 | * since the RXFIFO will take data for an endpoint even if the | |
2320 | * size register hasn't been set. | |
2321 | */ | |
2322 | ||
2323 | epctrl |= S3C_DxEPCTL_SNAK; | |
2324 | ||
2325 | /* update the endpoint state */ | |
2326 | hs_ep->ep.maxpacket = mps; | |
2327 | ||
2328 | /* default, set to non-periodic */ | |
2329 | hs_ep->periodic = 0; | |
2330 | ||
2331 | switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { | |
2332 | case USB_ENDPOINT_XFER_ISOC: | |
2333 | dev_err(hsotg->dev, "no current ISOC support\n"); | |
19c190f9 JL |
2334 | ret = -EINVAL; |
2335 | goto out; | |
5b7d70c6 BD |
2336 | |
2337 | case USB_ENDPOINT_XFER_BULK: | |
2338 | epctrl |= S3C_DxEPCTL_EPType_Bulk; | |
2339 | break; | |
2340 | ||
2341 | case USB_ENDPOINT_XFER_INT: | |
2342 | if (dir_in) { | |
2343 | /* Allocate our TxFNum by simply using the index | |
2344 | * of the endpoint for the moment. We could do | |
2345 | * something better if the host indicates how | |
2346 | * many FIFOs we are expecting to use. */ | |
2347 | ||
2348 | hs_ep->periodic = 1; | |
2349 | epctrl |= S3C_DxEPCTL_TxFNum(index); | |
2350 | } | |
2351 | ||
2352 | epctrl |= S3C_DxEPCTL_EPType_Intterupt; | |
2353 | break; | |
2354 | ||
2355 | case USB_ENDPOINT_XFER_CONTROL: | |
2356 | epctrl |= S3C_DxEPCTL_EPType_Control; | |
2357 | break; | |
2358 | } | |
2359 | ||
10aebc77 BD |
2360 | /* if the hardware has dedicated fifos, we must give each IN EP |
2361 | * a unique tx-fifo even if it is non-periodic. | |
2362 | */ | |
2363 | if (dir_in && hsotg->dedicated_fifos) | |
2364 | epctrl |= S3C_DxEPCTL_TxFNum(index); | |
2365 | ||
5b7d70c6 BD |
2366 | /* for non control endpoints, set PID to D0 */ |
2367 | if (index) | |
2368 | epctrl |= S3C_DxEPCTL_SetD0PID; | |
2369 | ||
2370 | dev_dbg(hsotg->dev, "%s: write DxEPCTL=0x%08x\n", | |
2371 | __func__, epctrl); | |
2372 | ||
2373 | writel(epctrl, hsotg->regs + epctrl_reg); | |
2374 | dev_dbg(hsotg->dev, "%s: read DxEPCTL=0x%08x\n", | |
2375 | __func__, readl(hsotg->regs + epctrl_reg)); | |
2376 | ||
2377 | /* enable the endpoint interrupt */ | |
2378 | s3c_hsotg_ctrl_epint(hsotg, index, dir_in, 1); | |
2379 | ||
19c190f9 | 2380 | out: |
5b7d70c6 | 2381 | spin_unlock_irqrestore(&hs_ep->lock, flags); |
19c190f9 | 2382 | return ret; |
5b7d70c6 BD |
2383 | } |
2384 | ||
2385 | static int s3c_hsotg_ep_disable(struct usb_ep *ep) | |
2386 | { | |
2387 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
2388 | struct s3c_hsotg *hsotg = hs_ep->parent; | |
2389 | int dir_in = hs_ep->dir_in; | |
2390 | int index = hs_ep->index; | |
2391 | unsigned long flags; | |
2392 | u32 epctrl_reg; | |
2393 | u32 ctrl; | |
2394 | ||
2395 | dev_info(hsotg->dev, "%s(ep %p)\n", __func__, ep); | |
2396 | ||
2397 | if (ep == &hsotg->eps[0].ep) { | |
2398 | dev_err(hsotg->dev, "%s: called for ep0\n", __func__); | |
2399 | return -EINVAL; | |
2400 | } | |
2401 | ||
2402 | epctrl_reg = dir_in ? S3C_DIEPCTL(index) : S3C_DOEPCTL(index); | |
2403 | ||
2404 | /* terminate all requests with shutdown */ | |
2405 | kill_all_requests(hsotg, hs_ep, -ESHUTDOWN, false); | |
2406 | ||
2407 | spin_lock_irqsave(&hs_ep->lock, flags); | |
2408 | ||
2409 | ctrl = readl(hsotg->regs + epctrl_reg); | |
2410 | ctrl &= ~S3C_DxEPCTL_EPEna; | |
2411 | ctrl &= ~S3C_DxEPCTL_USBActEp; | |
2412 | ctrl |= S3C_DxEPCTL_SNAK; | |
2413 | ||
2414 | dev_dbg(hsotg->dev, "%s: DxEPCTL=0x%08x\n", __func__, ctrl); | |
2415 | writel(ctrl, hsotg->regs + epctrl_reg); | |
2416 | ||
2417 | /* disable endpoint interrupts */ | |
2418 | s3c_hsotg_ctrl_epint(hsotg, hs_ep->index, hs_ep->dir_in, 0); | |
2419 | ||
2420 | spin_unlock_irqrestore(&hs_ep->lock, flags); | |
2421 | return 0; | |
2422 | } | |
2423 | ||
2424 | /** | |
2425 | * on_list - check request is on the given endpoint | |
2426 | * @ep: The endpoint to check. | |
2427 | * @test: The request to test if it is on the endpoint. | |
2428 | */ | |
2429 | static bool on_list(struct s3c_hsotg_ep *ep, struct s3c_hsotg_req *test) | |
2430 | { | |
2431 | struct s3c_hsotg_req *req, *treq; | |
2432 | ||
2433 | list_for_each_entry_safe(req, treq, &ep->queue, queue) { | |
2434 | if (req == test) | |
2435 | return true; | |
2436 | } | |
2437 | ||
2438 | return false; | |
2439 | } | |
2440 | ||
2441 | static int s3c_hsotg_ep_dequeue(struct usb_ep *ep, struct usb_request *req) | |
2442 | { | |
2443 | struct s3c_hsotg_req *hs_req = our_req(req); | |
2444 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
2445 | struct s3c_hsotg *hs = hs_ep->parent; | |
2446 | unsigned long flags; | |
2447 | ||
2448 | dev_info(hs->dev, "ep_dequeue(%p,%p)\n", ep, req); | |
2449 | ||
5b7d70c6 BD |
2450 | spin_lock_irqsave(&hs_ep->lock, flags); |
2451 | ||
2452 | if (!on_list(hs_ep, hs_req)) { | |
2453 | spin_unlock_irqrestore(&hs_ep->lock, flags); | |
2454 | return -EINVAL; | |
2455 | } | |
2456 | ||
2457 | s3c_hsotg_complete_request(hs, hs_ep, hs_req, -ECONNRESET); | |
2458 | spin_unlock_irqrestore(&hs_ep->lock, flags); | |
2459 | ||
2460 | return 0; | |
2461 | } | |
2462 | ||
2463 | static int s3c_hsotg_ep_sethalt(struct usb_ep *ep, int value) | |
2464 | { | |
2465 | struct s3c_hsotg_ep *hs_ep = our_ep(ep); | |
2466 | struct s3c_hsotg *hs = hs_ep->parent; | |
2467 | int index = hs_ep->index; | |
2468 | unsigned long irqflags; | |
2469 | u32 epreg; | |
2470 | u32 epctl; | |
9c39ddc6 | 2471 | u32 xfertype; |
5b7d70c6 BD |
2472 | |
2473 | dev_info(hs->dev, "%s(ep %p %s, %d)\n", __func__, ep, ep->name, value); | |
2474 | ||
2475 | spin_lock_irqsave(&hs_ep->lock, irqflags); | |
2476 | ||
2477 | /* write both IN and OUT control registers */ | |
2478 | ||
2479 | epreg = S3C_DIEPCTL(index); | |
2480 | epctl = readl(hs->regs + epreg); | |
2481 | ||
9c39ddc6 AT |
2482 | if (value) { |
2483 | epctl |= S3C_DxEPCTL_Stall + S3C_DxEPCTL_SNAK; | |
2484 | if (epctl & S3C_DxEPCTL_EPEna) | |
2485 | epctl |= S3C_DxEPCTL_EPDis; | |
2486 | } else { | |
5b7d70c6 | 2487 | epctl &= ~S3C_DxEPCTL_Stall; |
9c39ddc6 AT |
2488 | xfertype = epctl & S3C_DxEPCTL_EPType_MASK; |
2489 | if (xfertype == S3C_DxEPCTL_EPType_Bulk || | |
2490 | xfertype == S3C_DxEPCTL_EPType_Intterupt) | |
2491 | epctl |= S3C_DxEPCTL_SetD0PID; | |
2492 | } | |
5b7d70c6 BD |
2493 | |
2494 | writel(epctl, hs->regs + epreg); | |
2495 | ||
2496 | epreg = S3C_DOEPCTL(index); | |
2497 | epctl = readl(hs->regs + epreg); | |
2498 | ||
2499 | if (value) | |
2500 | epctl |= S3C_DxEPCTL_Stall; | |
9c39ddc6 | 2501 | else { |
5b7d70c6 | 2502 | epctl &= ~S3C_DxEPCTL_Stall; |
9c39ddc6 AT |
2503 | xfertype = epctl & S3C_DxEPCTL_EPType_MASK; |
2504 | if (xfertype == S3C_DxEPCTL_EPType_Bulk || | |
2505 | xfertype == S3C_DxEPCTL_EPType_Intterupt) | |
2506 | epctl |= S3C_DxEPCTL_SetD0PID; | |
2507 | } | |
5b7d70c6 BD |
2508 | |
2509 | writel(epctl, hs->regs + epreg); | |
2510 | ||
2511 | spin_unlock_irqrestore(&hs_ep->lock, irqflags); | |
2512 | ||
2513 | return 0; | |
2514 | } | |
2515 | ||
2516 | static struct usb_ep_ops s3c_hsotg_ep_ops = { | |
2517 | .enable = s3c_hsotg_ep_enable, | |
2518 | .disable = s3c_hsotg_ep_disable, | |
2519 | .alloc_request = s3c_hsotg_ep_alloc_request, | |
2520 | .free_request = s3c_hsotg_ep_free_request, | |
2521 | .queue = s3c_hsotg_ep_queue, | |
2522 | .dequeue = s3c_hsotg_ep_dequeue, | |
2523 | .set_halt = s3c_hsotg_ep_sethalt, | |
25985edc | 2524 | /* note, don't believe we have any call for the fifo routines */ |
5b7d70c6 BD |
2525 | }; |
2526 | ||
2527 | /** | |
2528 | * s3c_hsotg_corereset - issue softreset to the core | |
2529 | * @hsotg: The device state | |
2530 | * | |
2531 | * Issue a soft reset to the core, and await the core finishing it. | |
2532 | */ | |
2533 | static int s3c_hsotg_corereset(struct s3c_hsotg *hsotg) | |
2534 | { | |
2535 | int timeout; | |
2536 | u32 grstctl; | |
2537 | ||
2538 | dev_dbg(hsotg->dev, "resetting core\n"); | |
2539 | ||
2540 | /* issue soft reset */ | |
2541 | writel(S3C_GRSTCTL_CSftRst, hsotg->regs + S3C_GRSTCTL); | |
2542 | ||
2543 | timeout = 1000; | |
2544 | do { | |
2545 | grstctl = readl(hsotg->regs + S3C_GRSTCTL); | |
d00f5004 | 2546 | } while ((grstctl & S3C_GRSTCTL_CSftRst) && timeout-- > 0); |
5b7d70c6 | 2547 | |
d00f5004 | 2548 | if (grstctl & S3C_GRSTCTL_CSftRst) { |
5b7d70c6 BD |
2549 | dev_err(hsotg->dev, "Failed to get CSftRst asserted\n"); |
2550 | return -EINVAL; | |
2551 | } | |
2552 | ||
2553 | timeout = 1000; | |
2554 | ||
2555 | while (1) { | |
2556 | u32 grstctl = readl(hsotg->regs + S3C_GRSTCTL); | |
2557 | ||
2558 | if (timeout-- < 0) { | |
2559 | dev_info(hsotg->dev, | |
2560 | "%s: reset failed, GRSTCTL=%08x\n", | |
2561 | __func__, grstctl); | |
2562 | return -ETIMEDOUT; | |
2563 | } | |
2564 | ||
5b7d70c6 BD |
2565 | if (!(grstctl & S3C_GRSTCTL_AHBIdle)) |
2566 | continue; | |
2567 | ||
2568 | break; /* reset done */ | |
2569 | } | |
2570 | ||
2571 | dev_dbg(hsotg->dev, "reset successful\n"); | |
2572 | return 0; | |
2573 | } | |
2574 | ||
b0fca50f UKK |
2575 | int usb_gadget_probe_driver(struct usb_gadget_driver *driver, |
2576 | int (*bind)(struct usb_gadget *)) | |
5b7d70c6 BD |
2577 | { |
2578 | struct s3c_hsotg *hsotg = our_hsotg; | |
2579 | int ret; | |
2580 | ||
2581 | if (!hsotg) { | |
2582 | printk(KERN_ERR "%s: called with no device\n", __func__); | |
2583 | return -ENODEV; | |
2584 | } | |
2585 | ||
2586 | if (!driver) { | |
2587 | dev_err(hsotg->dev, "%s: no driver\n", __func__); | |
2588 | return -EINVAL; | |
2589 | } | |
2590 | ||
2591 | if (driver->speed != USB_SPEED_HIGH && | |
2592 | driver->speed != USB_SPEED_FULL) { | |
2593 | dev_err(hsotg->dev, "%s: bad speed\n", __func__); | |
2594 | } | |
2595 | ||
b0fca50f | 2596 | if (!bind || !driver->setup) { |
5b7d70c6 BD |
2597 | dev_err(hsotg->dev, "%s: missing entry points\n", __func__); |
2598 | return -EINVAL; | |
2599 | } | |
2600 | ||
2601 | WARN_ON(hsotg->driver); | |
2602 | ||
2603 | driver->driver.bus = NULL; | |
2604 | hsotg->driver = driver; | |
2605 | hsotg->gadget.dev.driver = &driver->driver; | |
2606 | hsotg->gadget.dev.dma_mask = hsotg->dev->dma_mask; | |
2607 | hsotg->gadget.speed = USB_SPEED_UNKNOWN; | |
2608 | ||
2609 | ret = device_add(&hsotg->gadget.dev); | |
2610 | if (ret) { | |
2611 | dev_err(hsotg->dev, "failed to register gadget device\n"); | |
2612 | goto err; | |
2613 | } | |
2614 | ||
b0fca50f | 2615 | ret = bind(&hsotg->gadget); |
5b7d70c6 BD |
2616 | if (ret) { |
2617 | dev_err(hsotg->dev, "failed bind %s\n", driver->driver.name); | |
2618 | ||
2619 | hsotg->gadget.dev.driver = NULL; | |
2620 | hsotg->driver = NULL; | |
2621 | goto err; | |
2622 | } | |
2623 | ||
2624 | /* we must now enable ep0 ready for host detection and then | |
2625 | * set configuration. */ | |
2626 | ||
2627 | s3c_hsotg_corereset(hsotg); | |
2628 | ||
2629 | /* set the PLL on, remove the HNP/SRP and set the PHY */ | |
2630 | writel(S3C_GUSBCFG_PHYIf16 | S3C_GUSBCFG_TOutCal(7) | | |
2631 | (0x5 << 10), hsotg->regs + S3C_GUSBCFG); | |
2632 | ||
2633 | /* looks like soft-reset changes state of FIFOs */ | |
2634 | s3c_hsotg_init_fifo(hsotg); | |
2635 | ||
2636 | __orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon); | |
2637 | ||
2638 | writel(1 << 18 | S3C_DCFG_DevSpd_HS, hsotg->regs + S3C_DCFG); | |
2639 | ||
a3395f0d AT |
2640 | /* Clear any pending OTG interrupts */ |
2641 | writel(0xffffffff, hsotg->regs + S3C_GOTGINT); | |
2642 | ||
2643 | /* Clear any pending interrupts */ | |
2644 | writel(0xffffffff, hsotg->regs + S3C_GINTSTS); | |
2645 | ||
5b7d70c6 BD |
2646 | writel(S3C_GINTSTS_DisconnInt | S3C_GINTSTS_SessReqInt | |
2647 | S3C_GINTSTS_ConIDStsChng | S3C_GINTSTS_USBRst | | |
2648 | S3C_GINTSTS_EnumDone | S3C_GINTSTS_OTGInt | | |
2649 | S3C_GINTSTS_USBSusp | S3C_GINTSTS_WkUpInt | | |
2650 | S3C_GINTSTS_GOUTNakEff | S3C_GINTSTS_GINNakEff | | |
2651 | S3C_GINTSTS_ErlySusp, | |
2652 | hsotg->regs + S3C_GINTMSK); | |
2653 | ||
2654 | if (using_dma(hsotg)) | |
2655 | writel(S3C_GAHBCFG_GlblIntrEn | S3C_GAHBCFG_DMAEn | | |
2656 | S3C_GAHBCFG_HBstLen_Incr4, | |
2657 | hsotg->regs + S3C_GAHBCFG); | |
2658 | else | |
2659 | writel(S3C_GAHBCFG_GlblIntrEn, hsotg->regs + S3C_GAHBCFG); | |
2660 | ||
2661 | /* Enabling INTknTXFEmpMsk here seems to be a big mistake, we end | |
2662 | * up being flooded with interrupts if the host is polling the | |
2663 | * endpoint to try and read data. */ | |
2664 | ||
2665 | writel(S3C_DIEPMSK_TimeOUTMsk | S3C_DIEPMSK_AHBErrMsk | | |
2666 | S3C_DIEPMSK_INTknEPMisMsk | | |
10aebc77 BD |
2667 | S3C_DIEPMSK_EPDisbldMsk | S3C_DIEPMSK_XferComplMsk | |
2668 | ((hsotg->dedicated_fifos) ? S3C_DIEPMSK_TxFIFOEmpty : 0), | |
5b7d70c6 BD |
2669 | hsotg->regs + S3C_DIEPMSK); |
2670 | ||
2671 | /* don't need XferCompl, we get that from RXFIFO in slave mode. In | |
2672 | * DMA mode we may need this. */ | |
2673 | writel(S3C_DOEPMSK_SetupMsk | S3C_DOEPMSK_AHBErrMsk | | |
2674 | S3C_DOEPMSK_EPDisbldMsk | | |
b7800218 RK |
2675 | (using_dma(hsotg) ? (S3C_DIEPMSK_XferComplMsk | |
2676 | S3C_DIEPMSK_TimeOUTMsk) : 0), | |
5b7d70c6 BD |
2677 | hsotg->regs + S3C_DOEPMSK); |
2678 | ||
2679 | writel(0, hsotg->regs + S3C_DAINTMSK); | |
2680 | ||
2681 | dev_info(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", | |
2682 | readl(hsotg->regs + S3C_DIEPCTL0), | |
2683 | readl(hsotg->regs + S3C_DOEPCTL0)); | |
2684 | ||
2685 | /* enable in and out endpoint interrupts */ | |
2686 | s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_OEPInt | S3C_GINTSTS_IEPInt); | |
2687 | ||
2688 | /* Enable the RXFIFO when in slave mode, as this is how we collect | |
2689 | * the data. In DMA mode, we get events from the FIFO but also | |
2690 | * things we cannot process, so do not use it. */ | |
2691 | if (!using_dma(hsotg)) | |
2692 | s3c_hsotg_en_gsint(hsotg, S3C_GINTSTS_RxFLvl); | |
2693 | ||
2694 | /* Enable interrupts for EP0 in and out */ | |
2695 | s3c_hsotg_ctrl_epint(hsotg, 0, 0, 1); | |
2696 | s3c_hsotg_ctrl_epint(hsotg, 0, 1, 1); | |
2697 | ||
2698 | __orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_PWROnPrgDone); | |
2699 | udelay(10); /* see openiboot */ | |
2700 | __bic32(hsotg->regs + S3C_DCTL, S3C_DCTL_PWROnPrgDone); | |
2701 | ||
2702 | dev_info(hsotg->dev, "DCTL=0x%08x\n", readl(hsotg->regs + S3C_DCTL)); | |
2703 | ||
2704 | /* S3C_DxEPCTL_USBActEp says RO in manual, but seems to be set by | |
2705 | writing to the EPCTL register.. */ | |
2706 | ||
2707 | /* set to read 1 8byte packet */ | |
2708 | writel(S3C_DxEPTSIZ_MC(1) | S3C_DxEPTSIZ_PktCnt(1) | | |
2709 | S3C_DxEPTSIZ_XferSize(8), hsotg->regs + DOEPTSIZ0); | |
2710 | ||
2711 | writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) | | |
2712 | S3C_DxEPCTL_CNAK | S3C_DxEPCTL_EPEna | | |
2713 | S3C_DxEPCTL_USBActEp, | |
2714 | hsotg->regs + S3C_DOEPCTL0); | |
2715 | ||
2716 | /* enable, but don't activate EP0in */ | |
2717 | writel(s3c_hsotg_ep0_mps(hsotg->eps[0].ep.maxpacket) | | |
2718 | S3C_DxEPCTL_USBActEp, hsotg->regs + S3C_DIEPCTL0); | |
2719 | ||
2720 | s3c_hsotg_enqueue_setup(hsotg); | |
2721 | ||
2722 | dev_info(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n", | |
2723 | readl(hsotg->regs + S3C_DIEPCTL0), | |
2724 | readl(hsotg->regs + S3C_DOEPCTL0)); | |
2725 | ||
2726 | /* clear global NAKs */ | |
2727 | writel(S3C_DCTL_CGOUTNak | S3C_DCTL_CGNPInNAK, | |
2728 | hsotg->regs + S3C_DCTL); | |
2729 | ||
2e0e0777 BD |
2730 | /* must be at-least 3ms to allow bus to see disconnect */ |
2731 | msleep(3); | |
2732 | ||
5b7d70c6 BD |
2733 | /* remove the soft-disconnect and let's go */ |
2734 | __bic32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon); | |
2735 | ||
2736 | /* report to the user, and return */ | |
2737 | ||
2738 | dev_info(hsotg->dev, "bound driver %s\n", driver->driver.name); | |
2739 | return 0; | |
2740 | ||
2741 | err: | |
2742 | hsotg->driver = NULL; | |
2743 | hsotg->gadget.dev.driver = NULL; | |
2744 | return ret; | |
2745 | } | |
b0fca50f | 2746 | EXPORT_SYMBOL(usb_gadget_probe_driver); |
5b7d70c6 BD |
2747 | |
2748 | int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) | |
2749 | { | |
2750 | struct s3c_hsotg *hsotg = our_hsotg; | |
2751 | int ep; | |
2752 | ||
2753 | if (!hsotg) | |
2754 | return -ENODEV; | |
2755 | ||
2756 | if (!driver || driver != hsotg->driver || !driver->unbind) | |
2757 | return -EINVAL; | |
2758 | ||
2759 | /* all endpoints should be shutdown */ | |
2760 | for (ep = 0; ep < S3C_HSOTG_EPS; ep++) | |
2761 | s3c_hsotg_ep_disable(&hsotg->eps[ep].ep); | |
2762 | ||
2763 | call_gadget(hsotg, disconnect); | |
2764 | ||
2765 | driver->unbind(&hsotg->gadget); | |
2766 | hsotg->driver = NULL; | |
2767 | hsotg->gadget.speed = USB_SPEED_UNKNOWN; | |
2768 | ||
2769 | device_del(&hsotg->gadget.dev); | |
2770 | ||
2771 | dev_info(hsotg->dev, "unregistered gadget driver '%s'\n", | |
2772 | driver->driver.name); | |
2773 | ||
2774 | return 0; | |
2775 | } | |
2776 | EXPORT_SYMBOL(usb_gadget_unregister_driver); | |
2777 | ||
2778 | static int s3c_hsotg_gadget_getframe(struct usb_gadget *gadget) | |
2779 | { | |
2780 | return s3c_hsotg_read_frameno(to_hsotg(gadget)); | |
2781 | } | |
2782 | ||
2783 | static struct usb_gadget_ops s3c_hsotg_gadget_ops = { | |
2784 | .get_frame = s3c_hsotg_gadget_getframe, | |
2785 | }; | |
2786 | ||
2787 | /** | |
2788 | * s3c_hsotg_initep - initialise a single endpoint | |
2789 | * @hsotg: The device state. | |
2790 | * @hs_ep: The endpoint to be initialised. | |
2791 | * @epnum: The endpoint number | |
2792 | * | |
2793 | * Initialise the given endpoint (as part of the probe and device state | |
2794 | * creation) to give to the gadget driver. Setup the endpoint name, any | |
2795 | * direction information and other state that may be required. | |
2796 | */ | |
2797 | static void __devinit s3c_hsotg_initep(struct s3c_hsotg *hsotg, | |
2798 | struct s3c_hsotg_ep *hs_ep, | |
2799 | int epnum) | |
2800 | { | |
2801 | u32 ptxfifo; | |
2802 | char *dir; | |
2803 | ||
2804 | if (epnum == 0) | |
2805 | dir = ""; | |
2806 | else if ((epnum % 2) == 0) { | |
2807 | dir = "out"; | |
2808 | } else { | |
2809 | dir = "in"; | |
2810 | hs_ep->dir_in = 1; | |
2811 | } | |
2812 | ||
2813 | hs_ep->index = epnum; | |
2814 | ||
2815 | snprintf(hs_ep->name, sizeof(hs_ep->name), "ep%d%s", epnum, dir); | |
2816 | ||
2817 | INIT_LIST_HEAD(&hs_ep->queue); | |
2818 | INIT_LIST_HEAD(&hs_ep->ep.ep_list); | |
2819 | ||
2820 | spin_lock_init(&hs_ep->lock); | |
2821 | ||
2822 | /* add to the list of endpoints known by the gadget driver */ | |
2823 | if (epnum) | |
2824 | list_add_tail(&hs_ep->ep.ep_list, &hsotg->gadget.ep_list); | |
2825 | ||
2826 | hs_ep->parent = hsotg; | |
2827 | hs_ep->ep.name = hs_ep->name; | |
2828 | hs_ep->ep.maxpacket = epnum ? 512 : EP0_MPS_LIMIT; | |
2829 | hs_ep->ep.ops = &s3c_hsotg_ep_ops; | |
2830 | ||
2831 | /* Read the FIFO size for the Periodic TX FIFO, even if we're | |
2832 | * an OUT endpoint, we may as well do this if in future the | |
2833 | * code is changed to make each endpoint's direction changeable. | |
2834 | */ | |
2835 | ||
2836 | ptxfifo = readl(hsotg->regs + S3C_DPTXFSIZn(epnum)); | |
679f9b7c | 2837 | hs_ep->fifo_size = S3C_DPTXFSIZn_DPTxFSize_GET(ptxfifo) * 4; |
5b7d70c6 BD |
2838 | |
2839 | /* if we're using dma, we need to set the next-endpoint pointer | |
2840 | * to be something valid. | |
2841 | */ | |
2842 | ||
2843 | if (using_dma(hsotg)) { | |
2844 | u32 next = S3C_DxEPCTL_NextEp((epnum + 1) % 15); | |
2845 | writel(next, hsotg->regs + S3C_DIEPCTL(epnum)); | |
2846 | writel(next, hsotg->regs + S3C_DOEPCTL(epnum)); | |
2847 | } | |
2848 | } | |
2849 | ||
2850 | /** | |
2851 | * s3c_hsotg_otgreset - reset the OtG phy block | |
2852 | * @hsotg: The host state. | |
2853 | * | |
2854 | * Power up the phy, set the basic configuration and start the PHY. | |
2855 | */ | |
2856 | static void s3c_hsotg_otgreset(struct s3c_hsotg *hsotg) | |
2857 | { | |
e50bf385 | 2858 | struct clk *xusbxti; |
1eb838d3 | 2859 | u32 pwr, osc; |
5b7d70c6 | 2860 | |
1eb838d3 MS |
2861 | pwr = readl(S3C_PHYPWR); |
2862 | pwr &= ~0x19; | |
2863 | writel(pwr, S3C_PHYPWR); | |
5b7d70c6 BD |
2864 | mdelay(1); |
2865 | ||
2866 | osc = hsotg->plat->is_osc ? S3C_PHYCLK_EXT_OSC : 0; | |
2867 | ||
e50bf385 MC |
2868 | xusbxti = clk_get(hsotg->dev, "xusbxti"); |
2869 | if (xusbxti && !IS_ERR(xusbxti)) { | |
2870 | switch (clk_get_rate(xusbxti)) { | |
2871 | case 12*MHZ: | |
2872 | osc |= S3C_PHYCLK_CLKSEL_12M; | |
2873 | break; | |
2874 | case 24*MHZ: | |
2875 | osc |= S3C_PHYCLK_CLKSEL_24M; | |
2876 | break; | |
2877 | default: | |
2878 | case 48*MHZ: | |
2879 | /* default reference clock */ | |
2880 | break; | |
2881 | } | |
2882 | clk_put(xusbxti); | |
2883 | } | |
2884 | ||
5b7d70c6 BD |
2885 | writel(osc | 0x10, S3C_PHYCLK); |
2886 | ||
2887 | /* issue a full set of resets to the otg and core */ | |
2888 | ||
2889 | writel(S3C_RSTCON_PHY, S3C_RSTCON); | |
2890 | udelay(20); /* at-least 10uS */ | |
2891 | writel(0, S3C_RSTCON); | |
2892 | } | |
2893 | ||
2894 | ||
2895 | static void s3c_hsotg_init(struct s3c_hsotg *hsotg) | |
2896 | { | |
10aebc77 BD |
2897 | u32 cfg4; |
2898 | ||
5b7d70c6 BD |
2899 | /* unmask subset of endpoint interrupts */ |
2900 | ||
2901 | writel(S3C_DIEPMSK_TimeOUTMsk | S3C_DIEPMSK_AHBErrMsk | | |
2902 | S3C_DIEPMSK_EPDisbldMsk | S3C_DIEPMSK_XferComplMsk, | |
2903 | hsotg->regs + S3C_DIEPMSK); | |
2904 | ||
2905 | writel(S3C_DOEPMSK_SetupMsk | S3C_DOEPMSK_AHBErrMsk | | |
2906 | S3C_DOEPMSK_EPDisbldMsk | S3C_DOEPMSK_XferComplMsk, | |
2907 | hsotg->regs + S3C_DOEPMSK); | |
2908 | ||
2909 | writel(0, hsotg->regs + S3C_DAINTMSK); | |
2910 | ||
390b1661 TA |
2911 | /* Be in disconnected state until gadget is registered */ |
2912 | __orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon); | |
2913 | ||
5b7d70c6 BD |
2914 | if (0) { |
2915 | /* post global nak until we're ready */ | |
2916 | writel(S3C_DCTL_SGNPInNAK | S3C_DCTL_SGOUTNak, | |
2917 | hsotg->regs + S3C_DCTL); | |
2918 | } | |
2919 | ||
2920 | /* setup fifos */ | |
2921 | ||
2922 | dev_info(hsotg->dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n", | |
2923 | readl(hsotg->regs + S3C_GRXFSIZ), | |
2924 | readl(hsotg->regs + S3C_GNPTXFSIZ)); | |
2925 | ||
2926 | s3c_hsotg_init_fifo(hsotg); | |
2927 | ||
2928 | /* set the PLL on, remove the HNP/SRP and set the PHY */ | |
2929 | writel(S3C_GUSBCFG_PHYIf16 | S3C_GUSBCFG_TOutCal(7) | (0x5 << 10), | |
2930 | hsotg->regs + S3C_GUSBCFG); | |
2931 | ||
2932 | writel(using_dma(hsotg) ? S3C_GAHBCFG_DMAEn : 0x0, | |
2933 | hsotg->regs + S3C_GAHBCFG); | |
10aebc77 BD |
2934 | |
2935 | /* check hardware configuration */ | |
2936 | ||
2937 | cfg4 = readl(hsotg->regs + 0x50); | |
2938 | hsotg->dedicated_fifos = (cfg4 >> 25) & 1; | |
2939 | ||
2940 | dev_info(hsotg->dev, "%s fifos\n", | |
2941 | hsotg->dedicated_fifos ? "dedicated" : "shared"); | |
5b7d70c6 BD |
2942 | } |
2943 | ||
2944 | static void s3c_hsotg_dump(struct s3c_hsotg *hsotg) | |
2945 | { | |
2946 | struct device *dev = hsotg->dev; | |
2947 | void __iomem *regs = hsotg->regs; | |
2948 | u32 val; | |
2949 | int idx; | |
2950 | ||
2951 | dev_info(dev, "DCFG=0x%08x, DCTL=0x%08x, DIEPMSK=%08x\n", | |
2952 | readl(regs + S3C_DCFG), readl(regs + S3C_DCTL), | |
2953 | readl(regs + S3C_DIEPMSK)); | |
2954 | ||
2955 | dev_info(dev, "GAHBCFG=0x%08x, 0x44=0x%08x\n", | |
2956 | readl(regs + S3C_GAHBCFG), readl(regs + 0x44)); | |
2957 | ||
2958 | dev_info(dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n", | |
2959 | readl(regs + S3C_GRXFSIZ), readl(regs + S3C_GNPTXFSIZ)); | |
2960 | ||
2961 | /* show periodic fifo settings */ | |
2962 | ||
2963 | for (idx = 1; idx <= 15; idx++) { | |
2964 | val = readl(regs + S3C_DPTXFSIZn(idx)); | |
2965 | dev_info(dev, "DPTx[%d] FSize=%d, StAddr=0x%08x\n", idx, | |
2966 | val >> S3C_DPTXFSIZn_DPTxFSize_SHIFT, | |
2967 | val & S3C_DPTXFSIZn_DPTxFStAddr_MASK); | |
2968 | } | |
2969 | ||
2970 | for (idx = 0; idx < 15; idx++) { | |
2971 | dev_info(dev, | |
2972 | "ep%d-in: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n", idx, | |
2973 | readl(regs + S3C_DIEPCTL(idx)), | |
2974 | readl(regs + S3C_DIEPTSIZ(idx)), | |
2975 | readl(regs + S3C_DIEPDMA(idx))); | |
2976 | ||
2977 | val = readl(regs + S3C_DOEPCTL(idx)); | |
2978 | dev_info(dev, | |
2979 | "ep%d-out: EPCTL=0x%08x, SIZ=0x%08x, DMA=0x%08x\n", | |
2980 | idx, readl(regs + S3C_DOEPCTL(idx)), | |
2981 | readl(regs + S3C_DOEPTSIZ(idx)), | |
2982 | readl(regs + S3C_DOEPDMA(idx))); | |
2983 | ||
2984 | } | |
2985 | ||
2986 | dev_info(dev, "DVBUSDIS=0x%08x, DVBUSPULSE=%08x\n", | |
2987 | readl(regs + S3C_DVBUSDIS), readl(regs + S3C_DVBUSPULSE)); | |
2988 | } | |
2989 | ||
2990 | ||
2991 | /** | |
2992 | * state_show - debugfs: show overall driver and device state. | |
2993 | * @seq: The seq file to write to. | |
2994 | * @v: Unused parameter. | |
2995 | * | |
2996 | * This debugfs entry shows the overall state of the hardware and | |
2997 | * some general information about each of the endpoints available | |
2998 | * to the system. | |
2999 | */ | |
3000 | static int state_show(struct seq_file *seq, void *v) | |
3001 | { | |
3002 | struct s3c_hsotg *hsotg = seq->private; | |
3003 | void __iomem *regs = hsotg->regs; | |
3004 | int idx; | |
3005 | ||
3006 | seq_printf(seq, "DCFG=0x%08x, DCTL=0x%08x, DSTS=0x%08x\n", | |
3007 | readl(regs + S3C_DCFG), | |
3008 | readl(regs + S3C_DCTL), | |
3009 | readl(regs + S3C_DSTS)); | |
3010 | ||
3011 | seq_printf(seq, "DIEPMSK=0x%08x, DOEPMASK=0x%08x\n", | |
3012 | readl(regs + S3C_DIEPMSK), readl(regs + S3C_DOEPMSK)); | |
3013 | ||
3014 | seq_printf(seq, "GINTMSK=0x%08x, GINTSTS=0x%08x\n", | |
3015 | readl(regs + S3C_GINTMSK), | |
3016 | readl(regs + S3C_GINTSTS)); | |
3017 | ||
3018 | seq_printf(seq, "DAINTMSK=0x%08x, DAINT=0x%08x\n", | |
3019 | readl(regs + S3C_DAINTMSK), | |
3020 | readl(regs + S3C_DAINT)); | |
3021 | ||
3022 | seq_printf(seq, "GNPTXSTS=0x%08x, GRXSTSR=%08x\n", | |
3023 | readl(regs + S3C_GNPTXSTS), | |
3024 | readl(regs + S3C_GRXSTSR)); | |
3025 | ||
3026 | seq_printf(seq, "\nEndpoint status:\n"); | |
3027 | ||
3028 | for (idx = 0; idx < 15; idx++) { | |
3029 | u32 in, out; | |
3030 | ||
3031 | in = readl(regs + S3C_DIEPCTL(idx)); | |
3032 | out = readl(regs + S3C_DOEPCTL(idx)); | |
3033 | ||
3034 | seq_printf(seq, "ep%d: DIEPCTL=0x%08x, DOEPCTL=0x%08x", | |
3035 | idx, in, out); | |
3036 | ||
3037 | in = readl(regs + S3C_DIEPTSIZ(idx)); | |
3038 | out = readl(regs + S3C_DOEPTSIZ(idx)); | |
3039 | ||
3040 | seq_printf(seq, ", DIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x", | |
3041 | in, out); | |
3042 | ||
3043 | seq_printf(seq, "\n"); | |
3044 | } | |
3045 | ||
3046 | return 0; | |
3047 | } | |
3048 | ||
3049 | static int state_open(struct inode *inode, struct file *file) | |
3050 | { | |
3051 | return single_open(file, state_show, inode->i_private); | |
3052 | } | |
3053 | ||
3054 | static const struct file_operations state_fops = { | |
3055 | .owner = THIS_MODULE, | |
3056 | .open = state_open, | |
3057 | .read = seq_read, | |
3058 | .llseek = seq_lseek, | |
3059 | .release = single_release, | |
3060 | }; | |
3061 | ||
3062 | /** | |
3063 | * fifo_show - debugfs: show the fifo information | |
3064 | * @seq: The seq_file to write data to. | |
3065 | * @v: Unused parameter. | |
3066 | * | |
3067 | * Show the FIFO information for the overall fifo and all the | |
3068 | * periodic transmission FIFOs. | |
3069 | */ | |
3070 | static int fifo_show(struct seq_file *seq, void *v) | |
3071 | { | |
3072 | struct s3c_hsotg *hsotg = seq->private; | |
3073 | void __iomem *regs = hsotg->regs; | |
3074 | u32 val; | |
3075 | int idx; | |
3076 | ||
3077 | seq_printf(seq, "Non-periodic FIFOs:\n"); | |
3078 | seq_printf(seq, "RXFIFO: Size %d\n", readl(regs + S3C_GRXFSIZ)); | |
3079 | ||
3080 | val = readl(regs + S3C_GNPTXFSIZ); | |
3081 | seq_printf(seq, "NPTXFIFO: Size %d, Start 0x%08x\n", | |
3082 | val >> S3C_GNPTXFSIZ_NPTxFDep_SHIFT, | |
3083 | val & S3C_GNPTXFSIZ_NPTxFStAddr_MASK); | |
3084 | ||
3085 | seq_printf(seq, "\nPeriodic TXFIFOs:\n"); | |
3086 | ||
3087 | for (idx = 1; idx <= 15; idx++) { | |
3088 | val = readl(regs + S3C_DPTXFSIZn(idx)); | |
3089 | ||
3090 | seq_printf(seq, "\tDPTXFIFO%2d: Size %d, Start 0x%08x\n", idx, | |
3091 | val >> S3C_DPTXFSIZn_DPTxFSize_SHIFT, | |
3092 | val & S3C_DPTXFSIZn_DPTxFStAddr_MASK); | |
3093 | } | |
3094 | ||
3095 | return 0; | |
3096 | } | |
3097 | ||
3098 | static int fifo_open(struct inode *inode, struct file *file) | |
3099 | { | |
3100 | return single_open(file, fifo_show, inode->i_private); | |
3101 | } | |
3102 | ||
3103 | static const struct file_operations fifo_fops = { | |
3104 | .owner = THIS_MODULE, | |
3105 | .open = fifo_open, | |
3106 | .read = seq_read, | |
3107 | .llseek = seq_lseek, | |
3108 | .release = single_release, | |
3109 | }; | |
3110 | ||
3111 | ||
3112 | static const char *decode_direction(int is_in) | |
3113 | { | |
3114 | return is_in ? "in" : "out"; | |
3115 | } | |
3116 | ||
3117 | /** | |
3118 | * ep_show - debugfs: show the state of an endpoint. | |
3119 | * @seq: The seq_file to write data to. | |
3120 | * @v: Unused parameter. | |
3121 | * | |
3122 | * This debugfs entry shows the state of the given endpoint (one is | |
3123 | * registered for each available). | |
3124 | */ | |
3125 | static int ep_show(struct seq_file *seq, void *v) | |
3126 | { | |
3127 | struct s3c_hsotg_ep *ep = seq->private; | |
3128 | struct s3c_hsotg *hsotg = ep->parent; | |
3129 | struct s3c_hsotg_req *req; | |
3130 | void __iomem *regs = hsotg->regs; | |
3131 | int index = ep->index; | |
3132 | int show_limit = 15; | |
3133 | unsigned long flags; | |
3134 | ||
3135 | seq_printf(seq, "Endpoint index %d, named %s, dir %s:\n", | |
3136 | ep->index, ep->ep.name, decode_direction(ep->dir_in)); | |
3137 | ||
3138 | /* first show the register state */ | |
3139 | ||
3140 | seq_printf(seq, "\tDIEPCTL=0x%08x, DOEPCTL=0x%08x\n", | |
3141 | readl(regs + S3C_DIEPCTL(index)), | |
3142 | readl(regs + S3C_DOEPCTL(index))); | |
3143 | ||
3144 | seq_printf(seq, "\tDIEPDMA=0x%08x, DOEPDMA=0x%08x\n", | |
3145 | readl(regs + S3C_DIEPDMA(index)), | |
3146 | readl(regs + S3C_DOEPDMA(index))); | |
3147 | ||
3148 | seq_printf(seq, "\tDIEPINT=0x%08x, DOEPINT=0x%08x\n", | |
3149 | readl(regs + S3C_DIEPINT(index)), | |
3150 | readl(regs + S3C_DOEPINT(index))); | |
3151 | ||
3152 | seq_printf(seq, "\tDIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x\n", | |
3153 | readl(regs + S3C_DIEPTSIZ(index)), | |
3154 | readl(regs + S3C_DOEPTSIZ(index))); | |
3155 | ||
3156 | seq_printf(seq, "\n"); | |
3157 | seq_printf(seq, "mps %d\n", ep->ep.maxpacket); | |
3158 | seq_printf(seq, "total_data=%ld\n", ep->total_data); | |
3159 | ||
3160 | seq_printf(seq, "request list (%p,%p):\n", | |
3161 | ep->queue.next, ep->queue.prev); | |
3162 | ||
3163 | spin_lock_irqsave(&ep->lock, flags); | |
3164 | ||
3165 | list_for_each_entry(req, &ep->queue, queue) { | |
3166 | if (--show_limit < 0) { | |
3167 | seq_printf(seq, "not showing more requests...\n"); | |
3168 | break; | |
3169 | } | |
3170 | ||
3171 | seq_printf(seq, "%c req %p: %d bytes @%p, ", | |
3172 | req == ep->req ? '*' : ' ', | |
3173 | req, req->req.length, req->req.buf); | |
3174 | seq_printf(seq, "%d done, res %d\n", | |
3175 | req->req.actual, req->req.status); | |
3176 | } | |
3177 | ||
3178 | spin_unlock_irqrestore(&ep->lock, flags); | |
3179 | ||
3180 | return 0; | |
3181 | } | |
3182 | ||
3183 | static int ep_open(struct inode *inode, struct file *file) | |
3184 | { | |
3185 | return single_open(file, ep_show, inode->i_private); | |
3186 | } | |
3187 | ||
3188 | static const struct file_operations ep_fops = { | |
3189 | .owner = THIS_MODULE, | |
3190 | .open = ep_open, | |
3191 | .read = seq_read, | |
3192 | .llseek = seq_lseek, | |
3193 | .release = single_release, | |
3194 | }; | |
3195 | ||
3196 | /** | |
3197 | * s3c_hsotg_create_debug - create debugfs directory and files | |
3198 | * @hsotg: The driver state | |
3199 | * | |
3200 | * Create the debugfs files to allow the user to get information | |
3201 | * about the state of the system. The directory name is created | |
3202 | * with the same name as the device itself, in case we end up | |
3203 | * with multiple blocks in future systems. | |
3204 | */ | |
3205 | static void __devinit s3c_hsotg_create_debug(struct s3c_hsotg *hsotg) | |
3206 | { | |
3207 | struct dentry *root; | |
3208 | unsigned epidx; | |
3209 | ||
3210 | root = debugfs_create_dir(dev_name(hsotg->dev), NULL); | |
3211 | hsotg->debug_root = root; | |
3212 | if (IS_ERR(root)) { | |
3213 | dev_err(hsotg->dev, "cannot create debug root\n"); | |
3214 | return; | |
3215 | } | |
3216 | ||
3217 | /* create general state file */ | |
3218 | ||
3219 | hsotg->debug_file = debugfs_create_file("state", 0444, root, | |
3220 | hsotg, &state_fops); | |
3221 | ||
3222 | if (IS_ERR(hsotg->debug_file)) | |
3223 | dev_err(hsotg->dev, "%s: failed to create state\n", __func__); | |
3224 | ||
3225 | hsotg->debug_fifo = debugfs_create_file("fifo", 0444, root, | |
3226 | hsotg, &fifo_fops); | |
3227 | ||
3228 | if (IS_ERR(hsotg->debug_fifo)) | |
3229 | dev_err(hsotg->dev, "%s: failed to create fifo\n", __func__); | |
3230 | ||
3231 | /* create one file for each endpoint */ | |
3232 | ||
3233 | for (epidx = 0; epidx < S3C_HSOTG_EPS; epidx++) { | |
3234 | struct s3c_hsotg_ep *ep = &hsotg->eps[epidx]; | |
3235 | ||
3236 | ep->debugfs = debugfs_create_file(ep->name, 0444, | |
3237 | root, ep, &ep_fops); | |
3238 | ||
3239 | if (IS_ERR(ep->debugfs)) | |
3240 | dev_err(hsotg->dev, "failed to create %s debug file\n", | |
3241 | ep->name); | |
3242 | } | |
3243 | } | |
3244 | ||
3245 | /** | |
3246 | * s3c_hsotg_delete_debug - cleanup debugfs entries | |
3247 | * @hsotg: The driver state | |
3248 | * | |
3249 | * Cleanup (remove) the debugfs files for use on module exit. | |
3250 | */ | |
3251 | static void __devexit s3c_hsotg_delete_debug(struct s3c_hsotg *hsotg) | |
3252 | { | |
3253 | unsigned epidx; | |
3254 | ||
3255 | for (epidx = 0; epidx < S3C_HSOTG_EPS; epidx++) { | |
3256 | struct s3c_hsotg_ep *ep = &hsotg->eps[epidx]; | |
3257 | debugfs_remove(ep->debugfs); | |
3258 | } | |
3259 | ||
3260 | debugfs_remove(hsotg->debug_file); | |
3261 | debugfs_remove(hsotg->debug_fifo); | |
3262 | debugfs_remove(hsotg->debug_root); | |
3263 | } | |
3264 | ||
3265 | /** | |
3266 | * s3c_hsotg_gate - set the hardware gate for the block | |
3267 | * @pdev: The device we bound to | |
3268 | * @on: On or off. | |
3269 | * | |
3270 | * Set the hardware gate setting into the block. If we end up on | |
3271 | * something other than an S3C64XX, then we might need to change this | |
3272 | * to using a platform data callback, or some other mechanism. | |
3273 | */ | |
3274 | static void s3c_hsotg_gate(struct platform_device *pdev, bool on) | |
3275 | { | |
3276 | unsigned long flags; | |
3277 | u32 others; | |
3278 | ||
3279 | local_irq_save(flags); | |
3280 | ||
3281 | others = __raw_readl(S3C64XX_OTHERS); | |
3282 | if (on) | |
3283 | others |= S3C64XX_OTHERS_USBMASK; | |
3284 | else | |
3285 | others &= ~S3C64XX_OTHERS_USBMASK; | |
3286 | __raw_writel(others, S3C64XX_OTHERS); | |
3287 | ||
3288 | local_irq_restore(flags); | |
3289 | } | |
3290 | ||
0978f8c5 | 3291 | static struct s3c_hsotg_plat s3c_hsotg_default_pdata; |
5b7d70c6 BD |
3292 | |
3293 | static int __devinit s3c_hsotg_probe(struct platform_device *pdev) | |
3294 | { | |
3295 | struct s3c_hsotg_plat *plat = pdev->dev.platform_data; | |
3296 | struct device *dev = &pdev->dev; | |
3297 | struct s3c_hsotg *hsotg; | |
3298 | struct resource *res; | |
3299 | int epnum; | |
3300 | int ret; | |
3301 | ||
3302 | if (!plat) | |
3303 | plat = &s3c_hsotg_default_pdata; | |
3304 | ||
3305 | hsotg = kzalloc(sizeof(struct s3c_hsotg) + | |
3306 | sizeof(struct s3c_hsotg_ep) * S3C_HSOTG_EPS, | |
3307 | GFP_KERNEL); | |
3308 | if (!hsotg) { | |
3309 | dev_err(dev, "cannot get memory\n"); | |
3310 | return -ENOMEM; | |
3311 | } | |
3312 | ||
3313 | hsotg->dev = dev; | |
3314 | hsotg->plat = plat; | |
3315 | ||
31ee04de MS |
3316 | hsotg->clk = clk_get(&pdev->dev, "otg"); |
3317 | if (IS_ERR(hsotg->clk)) { | |
3318 | dev_err(dev, "cannot get otg clock\n"); | |
3319 | ret = -EINVAL; | |
3320 | goto err_mem; | |
3321 | } | |
3322 | ||
5b7d70c6 BD |
3323 | platform_set_drvdata(pdev, hsotg); |
3324 | ||
3325 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
3326 | if (!res) { | |
3327 | dev_err(dev, "cannot find register resource 0\n"); | |
3328 | ret = -EINVAL; | |
31ee04de | 3329 | goto err_clk; |
5b7d70c6 BD |
3330 | } |
3331 | ||
3332 | hsotg->regs_res = request_mem_region(res->start, resource_size(res), | |
3333 | dev_name(dev)); | |
3334 | if (!hsotg->regs_res) { | |
3335 | dev_err(dev, "cannot reserve registers\n"); | |
3336 | ret = -ENOENT; | |
31ee04de | 3337 | goto err_clk; |
5b7d70c6 BD |
3338 | } |
3339 | ||
3340 | hsotg->regs = ioremap(res->start, resource_size(res)); | |
3341 | if (!hsotg->regs) { | |
3342 | dev_err(dev, "cannot map registers\n"); | |
3343 | ret = -ENXIO; | |
3344 | goto err_regs_res; | |
3345 | } | |
3346 | ||
3347 | ret = platform_get_irq(pdev, 0); | |
3348 | if (ret < 0) { | |
3349 | dev_err(dev, "cannot find IRQ\n"); | |
3350 | goto err_regs; | |
3351 | } | |
3352 | ||
3353 | hsotg->irq = ret; | |
3354 | ||
3355 | ret = request_irq(ret, s3c_hsotg_irq, 0, dev_name(dev), hsotg); | |
3356 | if (ret < 0) { | |
3357 | dev_err(dev, "cannot claim IRQ\n"); | |
3358 | goto err_regs; | |
3359 | } | |
3360 | ||
3361 | dev_info(dev, "regs %p, irq %d\n", hsotg->regs, hsotg->irq); | |
3362 | ||
3363 | device_initialize(&hsotg->gadget.dev); | |
3364 | ||
3365 | dev_set_name(&hsotg->gadget.dev, "gadget"); | |
3366 | ||
3367 | hsotg->gadget.is_dualspeed = 1; | |
3368 | hsotg->gadget.ops = &s3c_hsotg_gadget_ops; | |
3369 | hsotg->gadget.name = dev_name(dev); | |
3370 | ||
3371 | hsotg->gadget.dev.parent = dev; | |
3372 | hsotg->gadget.dev.dma_mask = dev->dma_mask; | |
3373 | ||
3374 | /* setup endpoint information */ | |
3375 | ||
3376 | INIT_LIST_HEAD(&hsotg->gadget.ep_list); | |
3377 | hsotg->gadget.ep0 = &hsotg->eps[0].ep; | |
3378 | ||
3379 | /* allocate EP0 request */ | |
3380 | ||
3381 | hsotg->ctrl_req = s3c_hsotg_ep_alloc_request(&hsotg->eps[0].ep, | |
3382 | GFP_KERNEL); | |
3383 | if (!hsotg->ctrl_req) { | |
3384 | dev_err(dev, "failed to allocate ctrl req\n"); | |
3385 | goto err_regs; | |
3386 | } | |
3387 | ||
3388 | /* reset the system */ | |
3389 | ||
31ee04de MS |
3390 | clk_enable(hsotg->clk); |
3391 | ||
5b7d70c6 BD |
3392 | s3c_hsotg_gate(pdev, true); |
3393 | ||
3394 | s3c_hsotg_otgreset(hsotg); | |
3395 | s3c_hsotg_corereset(hsotg); | |
3396 | s3c_hsotg_init(hsotg); | |
3397 | ||
3398 | /* initialise the endpoints now the core has been initialised */ | |
3399 | for (epnum = 0; epnum < S3C_HSOTG_EPS; epnum++) | |
3400 | s3c_hsotg_initep(hsotg, &hsotg->eps[epnum], epnum); | |
3401 | ||
3402 | s3c_hsotg_create_debug(hsotg); | |
3403 | ||
3404 | s3c_hsotg_dump(hsotg); | |
3405 | ||
3406 | our_hsotg = hsotg; | |
3407 | return 0; | |
3408 | ||
3409 | err_regs: | |
3410 | iounmap(hsotg->regs); | |
3411 | ||
3412 | err_regs_res: | |
3413 | release_resource(hsotg->regs_res); | |
3414 | kfree(hsotg->regs_res); | |
31ee04de MS |
3415 | err_clk: |
3416 | clk_put(hsotg->clk); | |
5b7d70c6 BD |
3417 | err_mem: |
3418 | kfree(hsotg); | |
3419 | return ret; | |
3420 | } | |
3421 | ||
3422 | static int __devexit s3c_hsotg_remove(struct platform_device *pdev) | |
3423 | { | |
3424 | struct s3c_hsotg *hsotg = platform_get_drvdata(pdev); | |
3425 | ||
3426 | s3c_hsotg_delete_debug(hsotg); | |
3427 | ||
3428 | usb_gadget_unregister_driver(hsotg->driver); | |
3429 | ||
3430 | free_irq(hsotg->irq, hsotg); | |
3431 | iounmap(hsotg->regs); | |
3432 | ||
3433 | release_resource(hsotg->regs_res); | |
3434 | kfree(hsotg->regs_res); | |
3435 | ||
3436 | s3c_hsotg_gate(pdev, false); | |
3437 | ||
31ee04de MS |
3438 | clk_disable(hsotg->clk); |
3439 | clk_put(hsotg->clk); | |
3440 | ||
5b7d70c6 BD |
3441 | kfree(hsotg); |
3442 | return 0; | |
3443 | } | |
3444 | ||
3445 | #if 1 | |
3446 | #define s3c_hsotg_suspend NULL | |
3447 | #define s3c_hsotg_resume NULL | |
3448 | #endif | |
3449 | ||
3450 | static struct platform_driver s3c_hsotg_driver = { | |
3451 | .driver = { | |
3452 | .name = "s3c-hsotg", | |
3453 | .owner = THIS_MODULE, | |
3454 | }, | |
3455 | .probe = s3c_hsotg_probe, | |
3456 | .remove = __devexit_p(s3c_hsotg_remove), | |
3457 | .suspend = s3c_hsotg_suspend, | |
3458 | .resume = s3c_hsotg_resume, | |
3459 | }; | |
3460 | ||
3461 | static int __init s3c_hsotg_modinit(void) | |
3462 | { | |
3463 | return platform_driver_register(&s3c_hsotg_driver); | |
3464 | } | |
3465 | ||
3466 | static void __exit s3c_hsotg_modexit(void) | |
3467 | { | |
3468 | platform_driver_unregister(&s3c_hsotg_driver); | |
3469 | } | |
3470 | ||
3471 | module_init(s3c_hsotg_modinit); | |
3472 | module_exit(s3c_hsotg_modexit); | |
3473 | ||
3474 | MODULE_DESCRIPTION("Samsung S3C USB High-speed/OtG device"); | |
3475 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); | |
3476 | MODULE_LICENSE("GPL"); | |
3477 | MODULE_ALIAS("platform:s3c-hsotg"); |