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1da177e4 LT |
1 | /* |
2 | * (C) Copyright Linus Torvalds 1999 | |
3 | * (C) Copyright Johannes Erdfelt 1999-2001 | |
4 | * (C) Copyright Andreas Gal 1999 | |
5 | * (C) Copyright Gregory P. Smith 1999 | |
6 | * (C) Copyright Deti Fliegl 1999 | |
7 | * (C) Copyright Randy Dunlap 2000 | |
8 | * (C) Copyright David Brownell 2000-2002 | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License as published by the | |
12 | * Free Software Foundation; either version 2 of the License, or (at your | |
13 | * option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
17 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
18 | * for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software Foundation, | |
22 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | */ | |
24 | ||
1da177e4 LT |
25 | #include <linux/module.h> |
26 | #include <linux/version.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/completion.h> | |
30 | #include <linux/utsname.h> | |
31 | #include <linux/mm.h> | |
32 | #include <asm/io.h> | |
1da177e4 LT |
33 | #include <linux/device.h> |
34 | #include <linux/dma-mapping.h> | |
4186ecf8 | 35 | #include <linux/mutex.h> |
1da177e4 LT |
36 | #include <asm/irq.h> |
37 | #include <asm/byteorder.h> | |
b3476675 | 38 | #include <asm/unaligned.h> |
64a21d02 | 39 | #include <linux/platform_device.h> |
6b157c9b | 40 | #include <linux/workqueue.h> |
1da177e4 LT |
41 | |
42 | #include <linux/usb.h> | |
27729aad | 43 | #include <linux/usb/hcd.h> |
1da177e4 LT |
44 | |
45 | #include "usb.h" | |
1da177e4 LT |
46 | |
47 | ||
1da177e4 LT |
48 | /*-------------------------------------------------------------------------*/ |
49 | ||
50 | /* | |
51 | * USB Host Controller Driver framework | |
52 | * | |
53 | * Plugs into usbcore (usb_bus) and lets HCDs share code, minimizing | |
54 | * HCD-specific behaviors/bugs. | |
55 | * | |
56 | * This does error checks, tracks devices and urbs, and delegates to a | |
57 | * "hc_driver" only for code (and data) that really needs to know about | |
58 | * hardware differences. That includes root hub registers, i/o queues, | |
59 | * and so on ... but as little else as possible. | |
60 | * | |
61 | * Shared code includes most of the "root hub" code (these are emulated, | |
62 | * though each HC's hardware works differently) and PCI glue, plus request | |
63 | * tracking overhead. The HCD code should only block on spinlocks or on | |
64 | * hardware handshaking; blocking on software events (such as other kernel | |
65 | * threads releasing resources, or completing actions) is all generic. | |
66 | * | |
67 | * Happens the USB 2.0 spec says this would be invisible inside the "USBD", | |
68 | * and includes mostly a "HCDI" (HCD Interface) along with some APIs used | |
69 | * only by the hub driver ... and that neither should be seen or used by | |
70 | * usb client device drivers. | |
71 | * | |
72 | * Contributors of ideas or unattributed patches include: David Brownell, | |
73 | * Roman Weissgaerber, Rory Bolt, Greg Kroah-Hartman, ... | |
74 | * | |
75 | * HISTORY: | |
76 | * 2002-02-21 Pull in most of the usb_bus support from usb.c; some | |
77 | * associated cleanup. "usb_hcd" still != "usb_bus". | |
78 | * 2001-12-12 Initial patch version for Linux 2.5.1 kernel. | |
79 | */ | |
80 | ||
81 | /*-------------------------------------------------------------------------*/ | |
82 | ||
9beeee65 AS |
83 | /* Keep track of which host controller drivers are loaded */ |
84 | unsigned long usb_hcds_loaded; | |
85 | EXPORT_SYMBOL_GPL(usb_hcds_loaded); | |
86 | ||
1da177e4 LT |
87 | /* host controllers we manage */ |
88 | LIST_HEAD (usb_bus_list); | |
89 | EXPORT_SYMBOL_GPL (usb_bus_list); | |
90 | ||
91 | /* used when allocating bus numbers */ | |
92 | #define USB_MAXBUS 64 | |
93 | struct usb_busmap { | |
94 | unsigned long busmap [USB_MAXBUS / (8*sizeof (unsigned long))]; | |
95 | }; | |
96 | static struct usb_busmap busmap; | |
97 | ||
98 | /* used when updating list of hcds */ | |
4186ecf8 | 99 | DEFINE_MUTEX(usb_bus_list_lock); /* exported only for usbfs */ |
1da177e4 LT |
100 | EXPORT_SYMBOL_GPL (usb_bus_list_lock); |
101 | ||
102 | /* used for controlling access to virtual root hubs */ | |
103 | static DEFINE_SPINLOCK(hcd_root_hub_lock); | |
104 | ||
809a58b8 AS |
105 | /* used when updating an endpoint's URB list */ |
106 | static DEFINE_SPINLOCK(hcd_urb_list_lock); | |
1da177e4 | 107 | |
cde217a5 AS |
108 | /* used to protect against unlinking URBs after the device is gone */ |
109 | static DEFINE_SPINLOCK(hcd_urb_unlink_lock); | |
110 | ||
1da177e4 LT |
111 | /* wait queue for synchronous unlinks */ |
112 | DECLARE_WAIT_QUEUE_HEAD(usb_kill_urb_queue); | |
113 | ||
809a58b8 AS |
114 | static inline int is_root_hub(struct usb_device *udev) |
115 | { | |
116 | return (udev->parent == NULL); | |
117 | } | |
118 | ||
1da177e4 LT |
119 | /*-------------------------------------------------------------------------*/ |
120 | ||
121 | /* | |
122 | * Sharable chunks of root hub code. | |
123 | */ | |
124 | ||
125 | /*-------------------------------------------------------------------------*/ | |
126 | ||
127 | #define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff) | |
128 | #define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff) | |
129 | ||
d2e9b4d6 SS |
130 | /* usb 3.0 root hub device descriptor */ |
131 | static const u8 usb3_rh_dev_descriptor[18] = { | |
132 | 0x12, /* __u8 bLength; */ | |
133 | 0x01, /* __u8 bDescriptorType; Device */ | |
134 | 0x00, 0x03, /* __le16 bcdUSB; v3.0 */ | |
135 | ||
136 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
137 | 0x00, /* __u8 bDeviceSubClass; */ | |
138 | 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */ | |
139 | 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */ | |
140 | ||
141 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ | |
cd780694 | 142 | 0x03, 0x00, /* __le16 idProduct; device 0x0003 */ |
d2e9b4d6 SS |
143 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
144 | ||
145 | 0x03, /* __u8 iManufacturer; */ | |
146 | 0x02, /* __u8 iProduct; */ | |
147 | 0x01, /* __u8 iSerialNumber; */ | |
148 | 0x01 /* __u8 bNumConfigurations; */ | |
149 | }; | |
150 | ||
1da177e4 LT |
151 | /* usb 2.0 root hub device descriptor */ |
152 | static const u8 usb2_rh_dev_descriptor [18] = { | |
153 | 0x12, /* __u8 bLength; */ | |
154 | 0x01, /* __u8 bDescriptorType; Device */ | |
155 | 0x00, 0x02, /* __le16 bcdUSB; v2.0 */ | |
156 | ||
157 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
158 | 0x00, /* __u8 bDeviceSubClass; */ | |
7329e211 | 159 | 0x00, /* __u8 bDeviceProtocol; [ usb 2.0 no TT ] */ |
16f16d11 | 160 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
1da177e4 | 161 | |
667d691e GKH |
162 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ |
163 | 0x02, 0x00, /* __le16 idProduct; device 0x0002 */ | |
1da177e4 LT |
164 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
165 | ||
166 | 0x03, /* __u8 iManufacturer; */ | |
167 | 0x02, /* __u8 iProduct; */ | |
168 | 0x01, /* __u8 iSerialNumber; */ | |
169 | 0x01 /* __u8 bNumConfigurations; */ | |
170 | }; | |
171 | ||
172 | /* no usb 2.0 root hub "device qualifier" descriptor: one speed only */ | |
173 | ||
174 | /* usb 1.1 root hub device descriptor */ | |
175 | static const u8 usb11_rh_dev_descriptor [18] = { | |
176 | 0x12, /* __u8 bLength; */ | |
177 | 0x01, /* __u8 bDescriptorType; Device */ | |
178 | 0x10, 0x01, /* __le16 bcdUSB; v1.1 */ | |
179 | ||
180 | 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */ | |
181 | 0x00, /* __u8 bDeviceSubClass; */ | |
182 | 0x00, /* __u8 bDeviceProtocol; [ low/full speeds only ] */ | |
16f16d11 | 183 | 0x40, /* __u8 bMaxPacketSize0; 64 Bytes */ |
1da177e4 | 184 | |
667d691e GKH |
185 | 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */ |
186 | 0x01, 0x00, /* __le16 idProduct; device 0x0001 */ | |
1da177e4 LT |
187 | KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */ |
188 | ||
189 | 0x03, /* __u8 iManufacturer; */ | |
190 | 0x02, /* __u8 iProduct; */ | |
191 | 0x01, /* __u8 iSerialNumber; */ | |
192 | 0x01 /* __u8 bNumConfigurations; */ | |
193 | }; | |
194 | ||
195 | ||
196 | /*-------------------------------------------------------------------------*/ | |
197 | ||
198 | /* Configuration descriptors for our root hubs */ | |
199 | ||
200 | static const u8 fs_rh_config_descriptor [] = { | |
201 | ||
202 | /* one configuration */ | |
203 | 0x09, /* __u8 bLength; */ | |
204 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
205 | 0x19, 0x00, /* __le16 wTotalLength; */ | |
206 | 0x01, /* __u8 bNumInterfaces; (1) */ | |
207 | 0x01, /* __u8 bConfigurationValue; */ | |
208 | 0x00, /* __u8 iConfiguration; */ | |
209 | 0xc0, /* __u8 bmAttributes; | |
210 | Bit 7: must be set, | |
211 | 6: Self-powered, | |
212 | 5: Remote wakeup, | |
213 | 4..0: resvd */ | |
214 | 0x00, /* __u8 MaxPower; */ | |
215 | ||
216 | /* USB 1.1: | |
217 | * USB 2.0, single TT organization (mandatory): | |
218 | * one interface, protocol 0 | |
219 | * | |
220 | * USB 2.0, multiple TT organization (optional): | |
221 | * two interfaces, protocols 1 (like single TT) | |
222 | * and 2 (multiple TT mode) ... config is | |
223 | * sometimes settable | |
224 | * NOT IMPLEMENTED | |
225 | */ | |
226 | ||
227 | /* one interface */ | |
228 | 0x09, /* __u8 if_bLength; */ | |
229 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
230 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
231 | 0x00, /* __u8 if_bAlternateSetting; */ | |
232 | 0x01, /* __u8 if_bNumEndpoints; */ | |
233 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
234 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
235 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ | |
236 | 0x00, /* __u8 if_iInterface; */ | |
237 | ||
238 | /* one endpoint (status change endpoint) */ | |
239 | 0x07, /* __u8 ep_bLength; */ | |
240 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
241 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
242 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ | |
243 | 0x02, 0x00, /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) */ | |
244 | 0xff /* __u8 ep_bInterval; (255ms -- usb 2.0 spec) */ | |
245 | }; | |
246 | ||
247 | static const u8 hs_rh_config_descriptor [] = { | |
248 | ||
249 | /* one configuration */ | |
250 | 0x09, /* __u8 bLength; */ | |
251 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
252 | 0x19, 0x00, /* __le16 wTotalLength; */ | |
253 | 0x01, /* __u8 bNumInterfaces; (1) */ | |
254 | 0x01, /* __u8 bConfigurationValue; */ | |
255 | 0x00, /* __u8 iConfiguration; */ | |
256 | 0xc0, /* __u8 bmAttributes; | |
257 | Bit 7: must be set, | |
258 | 6: Self-powered, | |
259 | 5: Remote wakeup, | |
260 | 4..0: resvd */ | |
261 | 0x00, /* __u8 MaxPower; */ | |
262 | ||
263 | /* USB 1.1: | |
264 | * USB 2.0, single TT organization (mandatory): | |
265 | * one interface, protocol 0 | |
266 | * | |
267 | * USB 2.0, multiple TT organization (optional): | |
268 | * two interfaces, protocols 1 (like single TT) | |
269 | * and 2 (multiple TT mode) ... config is | |
270 | * sometimes settable | |
271 | * NOT IMPLEMENTED | |
272 | */ | |
273 | ||
274 | /* one interface */ | |
275 | 0x09, /* __u8 if_bLength; */ | |
276 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
277 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
278 | 0x00, /* __u8 if_bAlternateSetting; */ | |
279 | 0x01, /* __u8 if_bNumEndpoints; */ | |
280 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
281 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
282 | 0x00, /* __u8 if_bInterfaceProtocol; [usb1.1 or single tt] */ | |
283 | 0x00, /* __u8 if_iInterface; */ | |
284 | ||
285 | /* one endpoint (status change endpoint) */ | |
286 | 0x07, /* __u8 ep_bLength; */ | |
287 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
288 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
289 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ | |
88fafff9 | 290 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) |
291 | * see hub.c:hub_configure() for details. */ | |
292 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, | |
1da177e4 LT |
293 | 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
294 | }; | |
295 | ||
d2e9b4d6 SS |
296 | static const u8 ss_rh_config_descriptor[] = { |
297 | /* one configuration */ | |
298 | 0x09, /* __u8 bLength; */ | |
299 | 0x02, /* __u8 bDescriptorType; Configuration */ | |
22c6a35d | 300 | 0x1f, 0x00, /* __le16 wTotalLength; */ |
d2e9b4d6 SS |
301 | 0x01, /* __u8 bNumInterfaces; (1) */ |
302 | 0x01, /* __u8 bConfigurationValue; */ | |
303 | 0x00, /* __u8 iConfiguration; */ | |
304 | 0xc0, /* __u8 bmAttributes; | |
305 | Bit 7: must be set, | |
306 | 6: Self-powered, | |
307 | 5: Remote wakeup, | |
308 | 4..0: resvd */ | |
309 | 0x00, /* __u8 MaxPower; */ | |
310 | ||
311 | /* one interface */ | |
312 | 0x09, /* __u8 if_bLength; */ | |
313 | 0x04, /* __u8 if_bDescriptorType; Interface */ | |
314 | 0x00, /* __u8 if_bInterfaceNumber; */ | |
315 | 0x00, /* __u8 if_bAlternateSetting; */ | |
316 | 0x01, /* __u8 if_bNumEndpoints; */ | |
317 | 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */ | |
318 | 0x00, /* __u8 if_bInterfaceSubClass; */ | |
319 | 0x00, /* __u8 if_bInterfaceProtocol; */ | |
320 | 0x00, /* __u8 if_iInterface; */ | |
321 | ||
322 | /* one endpoint (status change endpoint) */ | |
323 | 0x07, /* __u8 ep_bLength; */ | |
324 | 0x05, /* __u8 ep_bDescriptorType; Endpoint */ | |
325 | 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */ | |
326 | 0x03, /* __u8 ep_bmAttributes; Interrupt */ | |
327 | /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8) | |
328 | * see hub.c:hub_configure() for details. */ | |
329 | (USB_MAXCHILDREN + 1 + 7) / 8, 0x00, | |
22c6a35d SS |
330 | 0x0c, /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */ |
331 | ||
332 | /* one SuperSpeed endpoint companion descriptor */ | |
333 | 0x06, /* __u8 ss_bLength */ | |
334 | 0x30, /* __u8 ss_bDescriptorType; SuperSpeed EP Companion */ | |
335 | 0x00, /* __u8 ss_bMaxBurst; allows 1 TX between ACKs */ | |
336 | 0x00, /* __u8 ss_bmAttributes; 1 packet per service interval */ | |
337 | 0x02, 0x00 /* __le16 ss_wBytesPerInterval; 15 bits for max 15 ports */ | |
d2e9b4d6 SS |
338 | }; |
339 | ||
1da177e4 LT |
340 | /*-------------------------------------------------------------------------*/ |
341 | ||
392ca68b GS |
342 | /** |
343 | * ascii2desc() - Helper routine for producing UTF-16LE string descriptors | |
344 | * @s: Null-terminated ASCII (actually ISO-8859-1) string | |
345 | * @buf: Buffer for USB string descriptor (header + UTF-16LE) | |
346 | * @len: Length (in bytes; may be odd) of descriptor buffer. | |
347 | * | |
348 | * The return value is the number of bytes filled in: 2 + 2*strlen(s) or | |
349 | * buflen, whichever is less. | |
350 | * | |
351 | * USB String descriptors can contain at most 126 characters; input | |
352 | * strings longer than that are truncated. | |
1da177e4 | 353 | */ |
392ca68b GS |
354 | static unsigned |
355 | ascii2desc(char const *s, u8 *buf, unsigned len) | |
1da177e4 | 356 | { |
392ca68b GS |
357 | unsigned n, t = 2 + 2*strlen(s); |
358 | ||
359 | if (t > 254) | |
360 | t = 254; /* Longest possible UTF string descriptor */ | |
361 | if (len > t) | |
362 | len = t; | |
363 | ||
364 | t += USB_DT_STRING << 8; /* Now t is first 16 bits to store */ | |
365 | ||
366 | n = len; | |
367 | while (n--) { | |
368 | *buf++ = t; | |
369 | if (!n--) | |
370 | break; | |
371 | *buf++ = t >> 8; | |
372 | t = (unsigned char)*s++; | |
1da177e4 | 373 | } |
392ca68b | 374 | return len; |
1da177e4 LT |
375 | } |
376 | ||
392ca68b GS |
377 | /** |
378 | * rh_string() - provides string descriptors for root hub | |
379 | * @id: the string ID number (0: langids, 1: serial #, 2: product, 3: vendor) | |
1da177e4 | 380 | * @hcd: the host controller for this root hub |
392ca68b GS |
381 | * @data: buffer for output packet |
382 | * @len: length of the provided buffer | |
1da177e4 LT |
383 | * |
384 | * Produces either a manufacturer, product or serial number string for the | |
385 | * virtual root hub device. | |
392ca68b GS |
386 | * Returns the number of bytes filled in: the length of the descriptor or |
387 | * of the provided buffer, whichever is less. | |
1da177e4 | 388 | */ |
392ca68b GS |
389 | static unsigned |
390 | rh_string(int id, struct usb_hcd const *hcd, u8 *data, unsigned len) | |
71d2718f | 391 | { |
392ca68b GS |
392 | char buf[100]; |
393 | char const *s; | |
394 | static char const langids[4] = {4, USB_DT_STRING, 0x09, 0x04}; | |
1da177e4 LT |
395 | |
396 | // language ids | |
392ca68b GS |
397 | switch (id) { |
398 | case 0: | |
399 | /* Array of LANGID codes (0x0409 is MSFT-speak for "en-us") */ | |
400 | /* See http://www.usb.org/developers/docs/USB_LANGIDs.pdf */ | |
401 | if (len > 4) | |
402 | len = 4; | |
403 | memcpy(data, langids, len); | |
1da177e4 | 404 | return len; |
392ca68b GS |
405 | case 1: |
406 | /* Serial number */ | |
407 | s = hcd->self.bus_name; | |
408 | break; | |
409 | case 2: | |
410 | /* Product name */ | |
411 | s = hcd->product_desc; | |
412 | break; | |
413 | case 3: | |
414 | /* Manufacturer */ | |
96b644bd SH |
415 | snprintf (buf, sizeof buf, "%s %s %s", init_utsname()->sysname, |
416 | init_utsname()->release, hcd->driver->description); | |
392ca68b GS |
417 | s = buf; |
418 | break; | |
1da177e4 | 419 | default: |
392ca68b GS |
420 | /* Can't happen; caller guarantees it */ |
421 | return 0; | |
1da177e4 | 422 | } |
392ca68b GS |
423 | |
424 | return ascii2desc(s, data, len); | |
1da177e4 LT |
425 | } |
426 | ||
427 | ||
428 | /* Root hub control transfers execute synchronously */ | |
429 | static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) | |
430 | { | |
431 | struct usb_ctrlrequest *cmd; | |
432 | u16 typeReq, wValue, wIndex, wLength; | |
433 | u8 *ubuf = urb->transfer_buffer; | |
54bee6e1 MP |
434 | u8 tbuf [sizeof (struct usb_hub_descriptor)] |
435 | __attribute__((aligned(4))); | |
1da177e4 | 436 | const u8 *bufp = tbuf; |
71d2718f | 437 | unsigned len = 0; |
e9df41c5 | 438 | int status; |
7329e211 AS |
439 | u8 patch_wakeup = 0; |
440 | u8 patch_protocol = 0; | |
1da177e4 | 441 | |
9439eb94 AS |
442 | might_sleep(); |
443 | ||
e9df41c5 AS |
444 | spin_lock_irq(&hcd_root_hub_lock); |
445 | status = usb_hcd_link_urb_to_ep(hcd, urb); | |
446 | spin_unlock_irq(&hcd_root_hub_lock); | |
447 | if (status) | |
448 | return status; | |
b0d9efba | 449 | urb->hcpriv = hcd; /* Indicate it's queued */ |
e9df41c5 | 450 | |
1da177e4 LT |
451 | cmd = (struct usb_ctrlrequest *) urb->setup_packet; |
452 | typeReq = (cmd->bRequestType << 8) | cmd->bRequest; | |
453 | wValue = le16_to_cpu (cmd->wValue); | |
454 | wIndex = le16_to_cpu (cmd->wIndex); | |
455 | wLength = le16_to_cpu (cmd->wLength); | |
456 | ||
457 | if (wLength > urb->transfer_buffer_length) | |
458 | goto error; | |
459 | ||
460 | urb->actual_length = 0; | |
461 | switch (typeReq) { | |
462 | ||
463 | /* DEVICE REQUESTS */ | |
464 | ||
fb669cc0 DB |
465 | /* The root hub's remote wakeup enable bit is implemented using |
466 | * driver model wakeup flags. If this system supports wakeup | |
467 | * through USB, userspace may change the default "allow wakeup" | |
468 | * policy through sysfs or these calls. | |
469 | * | |
470 | * Most root hubs support wakeup from downstream devices, for | |
471 | * runtime power management (disabling USB clocks and reducing | |
472 | * VBUS power usage). However, not all of them do so; silicon, | |
473 | * board, and BIOS bugs here are not uncommon, so these can't | |
474 | * be treated quite like external hubs. | |
475 | * | |
476 | * Likewise, not all root hubs will pass wakeup events upstream, | |
477 | * to wake up the whole system. So don't assume root hub and | |
478 | * controller capabilities are identical. | |
479 | */ | |
480 | ||
1da177e4 | 481 | case DeviceRequest | USB_REQ_GET_STATUS: |
fb669cc0 DB |
482 | tbuf [0] = (device_may_wakeup(&hcd->self.root_hub->dev) |
483 | << USB_DEVICE_REMOTE_WAKEUP) | |
1da177e4 LT |
484 | | (1 << USB_DEVICE_SELF_POWERED); |
485 | tbuf [1] = 0; | |
486 | len = 2; | |
487 | break; | |
488 | case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: | |
489 | if (wValue == USB_DEVICE_REMOTE_WAKEUP) | |
fb669cc0 | 490 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 0); |
1da177e4 LT |
491 | else |
492 | goto error; | |
493 | break; | |
494 | case DeviceOutRequest | USB_REQ_SET_FEATURE: | |
fb669cc0 DB |
495 | if (device_can_wakeup(&hcd->self.root_hub->dev) |
496 | && wValue == USB_DEVICE_REMOTE_WAKEUP) | |
497 | device_set_wakeup_enable(&hcd->self.root_hub->dev, 1); | |
1da177e4 LT |
498 | else |
499 | goto error; | |
500 | break; | |
501 | case DeviceRequest | USB_REQ_GET_CONFIGURATION: | |
502 | tbuf [0] = 1; | |
503 | len = 1; | |
504 | /* FALLTHROUGH */ | |
505 | case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: | |
506 | break; | |
507 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: | |
508 | switch (wValue & 0xff00) { | |
509 | case USB_DT_DEVICE << 8: | |
83de4b2b | 510 | switch (hcd->speed) { |
7dd19e69 | 511 | case HCD_USB3: |
d2e9b4d6 | 512 | bufp = usb3_rh_dev_descriptor; |
7dd19e69 VM |
513 | break; |
514 | case HCD_USB2: | |
1da177e4 | 515 | bufp = usb2_rh_dev_descriptor; |
7dd19e69 VM |
516 | break; |
517 | case HCD_USB11: | |
1da177e4 | 518 | bufp = usb11_rh_dev_descriptor; |
7dd19e69 VM |
519 | break; |
520 | default: | |
1da177e4 | 521 | goto error; |
7dd19e69 | 522 | } |
1da177e4 | 523 | len = 18; |
7329e211 AS |
524 | if (hcd->has_tt) |
525 | patch_protocol = 1; | |
1da177e4 LT |
526 | break; |
527 | case USB_DT_CONFIG << 8: | |
83de4b2b | 528 | switch (hcd->speed) { |
7dd19e69 | 529 | case HCD_USB3: |
d2e9b4d6 SS |
530 | bufp = ss_rh_config_descriptor; |
531 | len = sizeof ss_rh_config_descriptor; | |
7dd19e69 VM |
532 | break; |
533 | case HCD_USB2: | |
1da177e4 LT |
534 | bufp = hs_rh_config_descriptor; |
535 | len = sizeof hs_rh_config_descriptor; | |
7dd19e69 VM |
536 | break; |
537 | case HCD_USB11: | |
1da177e4 LT |
538 | bufp = fs_rh_config_descriptor; |
539 | len = sizeof fs_rh_config_descriptor; | |
7dd19e69 VM |
540 | break; |
541 | default: | |
542 | goto error; | |
1da177e4 | 543 | } |
fb669cc0 | 544 | if (device_can_wakeup(&hcd->self.root_hub->dev)) |
1da177e4 LT |
545 | patch_wakeup = 1; |
546 | break; | |
547 | case USB_DT_STRING << 8: | |
71d2718f RK |
548 | if ((wValue & 0xff) < 4) |
549 | urb->actual_length = rh_string(wValue & 0xff, | |
550 | hcd, ubuf, wLength); | |
551 | else /* unsupported IDs --> "protocol stall" */ | |
1da177e4 | 552 | goto error; |
1da177e4 LT |
553 | break; |
554 | default: | |
555 | goto error; | |
556 | } | |
557 | break; | |
558 | case DeviceRequest | USB_REQ_GET_INTERFACE: | |
559 | tbuf [0] = 0; | |
560 | len = 1; | |
561 | /* FALLTHROUGH */ | |
562 | case DeviceOutRequest | USB_REQ_SET_INTERFACE: | |
563 | break; | |
564 | case DeviceOutRequest | USB_REQ_SET_ADDRESS: | |
565 | // wValue == urb->dev->devaddr | |
566 | dev_dbg (hcd->self.controller, "root hub device address %d\n", | |
567 | wValue); | |
568 | break; | |
569 | ||
570 | /* INTERFACE REQUESTS (no defined feature/status flags) */ | |
571 | ||
572 | /* ENDPOINT REQUESTS */ | |
573 | ||
574 | case EndpointRequest | USB_REQ_GET_STATUS: | |
575 | // ENDPOINT_HALT flag | |
576 | tbuf [0] = 0; | |
577 | tbuf [1] = 0; | |
578 | len = 2; | |
579 | /* FALLTHROUGH */ | |
580 | case EndpointOutRequest | USB_REQ_CLEAR_FEATURE: | |
581 | case EndpointOutRequest | USB_REQ_SET_FEATURE: | |
582 | dev_dbg (hcd->self.controller, "no endpoint features yet\n"); | |
583 | break; | |
584 | ||
585 | /* CLASS REQUESTS (and errors) */ | |
586 | ||
587 | default: | |
588 | /* non-generic request */ | |
b13296c6 DB |
589 | switch (typeReq) { |
590 | case GetHubStatus: | |
591 | case GetPortStatus: | |
592 | len = 4; | |
593 | break; | |
594 | case GetHubDescriptor: | |
595 | len = sizeof (struct usb_hub_descriptor); | |
596 | break; | |
1da177e4 | 597 | } |
b13296c6 DB |
598 | status = hcd->driver->hub_control (hcd, |
599 | typeReq, wValue, wIndex, | |
600 | tbuf, wLength); | |
1da177e4 LT |
601 | break; |
602 | error: | |
603 | /* "protocol stall" on error */ | |
604 | status = -EPIPE; | |
605 | } | |
606 | ||
607 | if (status) { | |
608 | len = 0; | |
609 | if (status != -EPIPE) { | |
610 | dev_dbg (hcd->self.controller, | |
611 | "CTRL: TypeReq=0x%x val=0x%x " | |
612 | "idx=0x%x len=%d ==> %d\n", | |
613 | typeReq, wValue, wIndex, | |
b13296c6 | 614 | wLength, status); |
1da177e4 LT |
615 | } |
616 | } | |
617 | if (len) { | |
618 | if (urb->transfer_buffer_length < len) | |
619 | len = urb->transfer_buffer_length; | |
620 | urb->actual_length = len; | |
621 | // always USB_DIR_IN, toward host | |
622 | memcpy (ubuf, bufp, len); | |
623 | ||
624 | /* report whether RH hardware supports remote wakeup */ | |
625 | if (patch_wakeup && | |
626 | len > offsetof (struct usb_config_descriptor, | |
627 | bmAttributes)) | |
628 | ((struct usb_config_descriptor *)ubuf)->bmAttributes | |
629 | |= USB_CONFIG_ATT_WAKEUP; | |
7329e211 AS |
630 | |
631 | /* report whether RH hardware has an integrated TT */ | |
632 | if (patch_protocol && | |
633 | len > offsetof(struct usb_device_descriptor, | |
634 | bDeviceProtocol)) | |
635 | ((struct usb_device_descriptor *) ubuf)-> | |
636 | bDeviceProtocol = 1; | |
1da177e4 LT |
637 | } |
638 | ||
639 | /* any errors get returned through the urb completion */ | |
9439eb94 | 640 | spin_lock_irq(&hcd_root_hub_lock); |
e9df41c5 | 641 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
9439eb94 AS |
642 | |
643 | /* This peculiar use of spinlocks echoes what real HC drivers do. | |
644 | * Avoiding calls to local_irq_disable/enable makes the code | |
645 | * RT-friendly. | |
646 | */ | |
647 | spin_unlock(&hcd_root_hub_lock); | |
4a00027d | 648 | usb_hcd_giveback_urb(hcd, urb, status); |
9439eb94 AS |
649 | spin_lock(&hcd_root_hub_lock); |
650 | ||
651 | spin_unlock_irq(&hcd_root_hub_lock); | |
1da177e4 LT |
652 | return 0; |
653 | } | |
654 | ||
655 | /*-------------------------------------------------------------------------*/ | |
656 | ||
657 | /* | |
d5926ae7 AS |
658 | * Root Hub interrupt transfers are polled using a timer if the |
659 | * driver requests it; otherwise the driver is responsible for | |
660 | * calling usb_hcd_poll_rh_status() when an event occurs. | |
1da177e4 | 661 | * |
d5926ae7 AS |
662 | * Completions are called in_interrupt(), but they may or may not |
663 | * be in_irq(). | |
1da177e4 | 664 | */ |
d5926ae7 AS |
665 | void usb_hcd_poll_rh_status(struct usb_hcd *hcd) |
666 | { | |
667 | struct urb *urb; | |
668 | int length; | |
669 | unsigned long flags; | |
ad361c98 | 670 | char buffer[6]; /* Any root hubs with > 31 ports? */ |
1da177e4 | 671 | |
6d88e679 | 672 | if (unlikely(!hcd->rh_pollable)) |
1b42ae6d | 673 | return; |
d5926ae7 AS |
674 | if (!hcd->uses_new_polling && !hcd->status_urb) |
675 | return; | |
1da177e4 | 676 | |
d5926ae7 AS |
677 | length = hcd->driver->hub_status_data(hcd, buffer); |
678 | if (length > 0) { | |
1da177e4 | 679 | |
d5926ae7 | 680 | /* try to complete the status urb */ |
9439eb94 | 681 | spin_lock_irqsave(&hcd_root_hub_lock, flags); |
d5926ae7 AS |
682 | urb = hcd->status_urb; |
683 | if (urb) { | |
541c7d43 | 684 | clear_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); |
e9df41c5 | 685 | hcd->status_urb = NULL; |
e9df41c5 AS |
686 | urb->actual_length = length; |
687 | memcpy(urb->transfer_buffer, buffer, length); | |
9439eb94 | 688 | |
e9df41c5 | 689 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
9439eb94 | 690 | spin_unlock(&hcd_root_hub_lock); |
4a00027d | 691 | usb_hcd_giveback_urb(hcd, urb, 0); |
9439eb94 | 692 | spin_lock(&hcd_root_hub_lock); |
e9df41c5 | 693 | } else { |
d5926ae7 | 694 | length = 0; |
541c7d43 | 695 | set_bit(HCD_FLAG_POLL_PENDING, &hcd->flags); |
e9df41c5 | 696 | } |
9439eb94 | 697 | spin_unlock_irqrestore(&hcd_root_hub_lock, flags); |
1da177e4 LT |
698 | } |
699 | ||
d5926ae7 | 700 | /* The USB 2.0 spec says 256 ms. This is close enough and won't |
01cd0819 AV |
701 | * exceed that limit if HZ is 100. The math is more clunky than |
702 | * maybe expected, this is to make sure that all timers for USB devices | |
25985edc | 703 | * fire at the same time to give the CPU a break in between */ |
541c7d43 | 704 | if (hcd->uses_new_polling ? HCD_POLL_RH(hcd) : |
d5926ae7 | 705 | (length == 0 && hcd->status_urb != NULL)) |
01cd0819 | 706 | mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); |
1da177e4 | 707 | } |
d5926ae7 | 708 | EXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status); |
1da177e4 LT |
709 | |
710 | /* timer callback */ | |
d5926ae7 AS |
711 | static void rh_timer_func (unsigned long _hcd) |
712 | { | |
713 | usb_hcd_poll_rh_status((struct usb_hcd *) _hcd); | |
714 | } | |
715 | ||
716 | /*-------------------------------------------------------------------------*/ | |
1da177e4 | 717 | |
d5926ae7 | 718 | static int rh_queue_status (struct usb_hcd *hcd, struct urb *urb) |
1da177e4 | 719 | { |
d5926ae7 | 720 | int retval; |
1da177e4 | 721 | unsigned long flags; |
71d2718f | 722 | unsigned len = 1 + (urb->dev->maxchild / 8); |
1da177e4 | 723 | |
d5926ae7 | 724 | spin_lock_irqsave (&hcd_root_hub_lock, flags); |
e9df41c5 | 725 | if (hcd->status_urb || urb->transfer_buffer_length < len) { |
d5926ae7 AS |
726 | dev_dbg (hcd->self.controller, "not queuing rh status urb\n"); |
727 | retval = -EINVAL; | |
e9df41c5 AS |
728 | goto done; |
729 | } | |
1da177e4 | 730 | |
e9df41c5 AS |
731 | retval = usb_hcd_link_urb_to_ep(hcd, urb); |
732 | if (retval) | |
733 | goto done; | |
1da177e4 | 734 | |
e9df41c5 AS |
735 | hcd->status_urb = urb; |
736 | urb->hcpriv = hcd; /* indicate it's queued */ | |
737 | if (!hcd->uses_new_polling) | |
738 | mod_timer(&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4)); | |
739 | ||
740 | /* If a status change has already occurred, report it ASAP */ | |
541c7d43 | 741 | else if (HCD_POLL_PENDING(hcd)) |
e9df41c5 AS |
742 | mod_timer(&hcd->rh_timer, jiffies); |
743 | retval = 0; | |
744 | done: | |
d5926ae7 AS |
745 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
746 | return retval; | |
1da177e4 LT |
747 | } |
748 | ||
1da177e4 LT |
749 | static int rh_urb_enqueue (struct usb_hcd *hcd, struct urb *urb) |
750 | { | |
5e60a161 | 751 | if (usb_endpoint_xfer_int(&urb->ep->desc)) |
d5926ae7 | 752 | return rh_queue_status (hcd, urb); |
5e60a161 | 753 | if (usb_endpoint_xfer_control(&urb->ep->desc)) |
1da177e4 | 754 | return rh_call_control (hcd, urb); |
d5926ae7 | 755 | return -EINVAL; |
1da177e4 LT |
756 | } |
757 | ||
758 | /*-------------------------------------------------------------------------*/ | |
759 | ||
455b25fb AS |
760 | /* Unlinks of root-hub control URBs are legal, but they don't do anything |
761 | * since these URBs always execute synchronously. | |
d5926ae7 | 762 | */ |
e9df41c5 | 763 | static int usb_rh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 | 764 | { |
455b25fb | 765 | unsigned long flags; |
e9df41c5 | 766 | int rc; |
1da177e4 | 767 | |
9439eb94 | 768 | spin_lock_irqsave(&hcd_root_hub_lock, flags); |
e9df41c5 AS |
769 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
770 | if (rc) | |
771 | goto done; | |
772 | ||
5e60a161 | 773 | if (usb_endpoint_num(&urb->ep->desc) == 0) { /* Control URB */ |
455b25fb | 774 | ; /* Do nothing */ |
d5926ae7 AS |
775 | |
776 | } else { /* Status URB */ | |
777 | if (!hcd->uses_new_polling) | |
455b25fb | 778 | del_timer (&hcd->rh_timer); |
d5926ae7 AS |
779 | if (urb == hcd->status_urb) { |
780 | hcd->status_urb = NULL; | |
e9df41c5 | 781 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
1da177e4 | 782 | |
9439eb94 | 783 | spin_unlock(&hcd_root_hub_lock); |
4a00027d | 784 | usb_hcd_giveback_urb(hcd, urb, status); |
9439eb94 AS |
785 | spin_lock(&hcd_root_hub_lock); |
786 | } | |
787 | } | |
e9df41c5 | 788 | done: |
9439eb94 | 789 | spin_unlock_irqrestore(&hcd_root_hub_lock, flags); |
e9df41c5 | 790 | return rc; |
1da177e4 LT |
791 | } |
792 | ||
5234ce1b IPG |
793 | |
794 | ||
795 | /* | |
796 | * Show & store the current value of authorized_default | |
797 | */ | |
798 | static ssize_t usb_host_authorized_default_show(struct device *dev, | |
799 | struct device_attribute *attr, | |
800 | char *buf) | |
801 | { | |
802 | struct usb_device *rh_usb_dev = to_usb_device(dev); | |
803 | struct usb_bus *usb_bus = rh_usb_dev->bus; | |
804 | struct usb_hcd *usb_hcd; | |
805 | ||
806 | if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ | |
807 | return -ENODEV; | |
808 | usb_hcd = bus_to_hcd(usb_bus); | |
809 | return snprintf(buf, PAGE_SIZE, "%u\n", usb_hcd->authorized_default); | |
810 | } | |
811 | ||
812 | static ssize_t usb_host_authorized_default_store(struct device *dev, | |
813 | struct device_attribute *attr, | |
814 | const char *buf, size_t size) | |
815 | { | |
816 | ssize_t result; | |
817 | unsigned val; | |
818 | struct usb_device *rh_usb_dev = to_usb_device(dev); | |
819 | struct usb_bus *usb_bus = rh_usb_dev->bus; | |
820 | struct usb_hcd *usb_hcd; | |
821 | ||
822 | if (usb_bus == NULL) /* FIXME: not sure if this case is possible */ | |
823 | return -ENODEV; | |
824 | usb_hcd = bus_to_hcd(usb_bus); | |
825 | result = sscanf(buf, "%u\n", &val); | |
826 | if (result == 1) { | |
827 | usb_hcd->authorized_default = val? 1 : 0; | |
828 | result = size; | |
829 | } | |
830 | else | |
831 | result = -EINVAL; | |
832 | return result; | |
833 | } | |
834 | ||
835 | static DEVICE_ATTR(authorized_default, 0644, | |
836 | usb_host_authorized_default_show, | |
837 | usb_host_authorized_default_store); | |
838 | ||
839 | ||
840 | /* Group all the USB bus attributes */ | |
841 | static struct attribute *usb_bus_attrs[] = { | |
842 | &dev_attr_authorized_default.attr, | |
843 | NULL, | |
844 | }; | |
845 | ||
846 | static struct attribute_group usb_bus_attr_group = { | |
847 | .name = NULL, /* we want them in the same directory */ | |
848 | .attrs = usb_bus_attrs, | |
849 | }; | |
850 | ||
851 | ||
852 | ||
1da177e4 LT |
853 | /*-------------------------------------------------------------------------*/ |
854 | ||
1da177e4 LT |
855 | /** |
856 | * usb_bus_init - shared initialization code | |
857 | * @bus: the bus structure being initialized | |
858 | * | |
859 | * This code is used to initialize a usb_bus structure, memory for which is | |
860 | * separately managed. | |
861 | */ | |
862 | static void usb_bus_init (struct usb_bus *bus) | |
863 | { | |
864 | memset (&bus->devmap, 0, sizeof(struct usb_devmap)); | |
865 | ||
866 | bus->devnum_next = 1; | |
867 | ||
868 | bus->root_hub = NULL; | |
1da177e4 LT |
869 | bus->busnum = -1; |
870 | bus->bandwidth_allocated = 0; | |
871 | bus->bandwidth_int_reqs = 0; | |
872 | bus->bandwidth_isoc_reqs = 0; | |
873 | ||
874 | INIT_LIST_HEAD (&bus->bus_list); | |
1da177e4 LT |
875 | } |
876 | ||
1da177e4 LT |
877 | /*-------------------------------------------------------------------------*/ |
878 | ||
879 | /** | |
880 | * usb_register_bus - registers the USB host controller with the usb core | |
881 | * @bus: pointer to the bus to register | |
882 | * Context: !in_interrupt() | |
883 | * | |
884 | * Assigns a bus number, and links the controller into usbcore data | |
885 | * structures so that it can be seen by scanning the bus list. | |
886 | */ | |
887 | static int usb_register_bus(struct usb_bus *bus) | |
888 | { | |
eb579f58 | 889 | int result = -E2BIG; |
1da177e4 | 890 | int busnum; |
1da177e4 | 891 | |
4186ecf8 | 892 | mutex_lock(&usb_bus_list_lock); |
1da177e4 | 893 | busnum = find_next_zero_bit (busmap.busmap, USB_MAXBUS, 1); |
eb579f58 | 894 | if (busnum >= USB_MAXBUS) { |
1da177e4 | 895 | printk (KERN_ERR "%s: too many buses\n", usbcore_name); |
eb579f58 | 896 | goto error_find_busnum; |
1da177e4 | 897 | } |
eb579f58 IPG |
898 | set_bit (busnum, busmap.busmap); |
899 | bus->busnum = busnum; | |
5a3201b2 | 900 | |
1da177e4 LT |
901 | /* Add it to the local list of buses */ |
902 | list_add (&bus->bus_list, &usb_bus_list); | |
4186ecf8 | 903 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 904 | |
3099e75a | 905 | usb_notify_add_bus(bus); |
1da177e4 | 906 | |
eb579f58 IPG |
907 | dev_info (bus->controller, "new USB bus registered, assigned bus " |
908 | "number %d\n", bus->busnum); | |
1da177e4 | 909 | return 0; |
eb579f58 | 910 | |
eb579f58 IPG |
911 | error_find_busnum: |
912 | mutex_unlock(&usb_bus_list_lock); | |
913 | return result; | |
1da177e4 LT |
914 | } |
915 | ||
916 | /** | |
917 | * usb_deregister_bus - deregisters the USB host controller | |
918 | * @bus: pointer to the bus to deregister | |
919 | * Context: !in_interrupt() | |
920 | * | |
921 | * Recycles the bus number, and unlinks the controller from usbcore data | |
922 | * structures so that it won't be seen by scanning the bus list. | |
923 | */ | |
924 | static void usb_deregister_bus (struct usb_bus *bus) | |
925 | { | |
926 | dev_info (bus->controller, "USB bus %d deregistered\n", bus->busnum); | |
927 | ||
928 | /* | |
929 | * NOTE: make sure that all the devices are removed by the | |
930 | * controller code, as well as having it call this when cleaning | |
931 | * itself up | |
932 | */ | |
4186ecf8 | 933 | mutex_lock(&usb_bus_list_lock); |
1da177e4 | 934 | list_del (&bus->bus_list); |
4186ecf8 | 935 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 936 | |
3099e75a | 937 | usb_notify_remove_bus(bus); |
1da177e4 LT |
938 | |
939 | clear_bit (bus->busnum, busmap.busmap); | |
1da177e4 LT |
940 | } |
941 | ||
942 | /** | |
8ec8d20b | 943 | * register_root_hub - called by usb_add_hcd() to register a root hub |
1da177e4 LT |
944 | * @hcd: host controller for this root hub |
945 | * | |
8ec8d20b | 946 | * This function registers the root hub with the USB subsystem. It sets up |
b1e8f0a6 DB |
947 | * the device properly in the device tree and then calls usb_new_device() |
948 | * to register the usb device. It also assigns the root hub's USB address | |
949 | * (always 1). | |
1da177e4 | 950 | */ |
b1e8f0a6 | 951 | static int register_root_hub(struct usb_hcd *hcd) |
1da177e4 LT |
952 | { |
953 | struct device *parent_dev = hcd->self.controller; | |
b1e8f0a6 | 954 | struct usb_device *usb_dev = hcd->self.root_hub; |
1da177e4 LT |
955 | const int devnum = 1; |
956 | int retval; | |
957 | ||
1da177e4 LT |
958 | usb_dev->devnum = devnum; |
959 | usb_dev->bus->devnum_next = devnum + 1; | |
960 | memset (&usb_dev->bus->devmap.devicemap, 0, | |
961 | sizeof usb_dev->bus->devmap.devicemap); | |
962 | set_bit (devnum, usb_dev->bus->devmap.devicemap); | |
963 | usb_set_device_state(usb_dev, USB_STATE_ADDRESS); | |
964 | ||
4186ecf8 | 965 | mutex_lock(&usb_bus_list_lock); |
1da177e4 | 966 | |
551509d2 | 967 | usb_dev->ep0.desc.wMaxPacketSize = cpu_to_le16(64); |
1da177e4 LT |
968 | retval = usb_get_device_descriptor(usb_dev, USB_DT_DEVICE_SIZE); |
969 | if (retval != sizeof usb_dev->descriptor) { | |
4186ecf8 | 970 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 971 | dev_dbg (parent_dev, "can't read %s device descriptor %d\n", |
7071a3ce | 972 | dev_name(&usb_dev->dev), retval); |
1da177e4 LT |
973 | return (retval < 0) ? retval : -EMSGSIZE; |
974 | } | |
975 | ||
1da177e4 | 976 | retval = usb_new_device (usb_dev); |
1da177e4 | 977 | if (retval) { |
1da177e4 | 978 | dev_err (parent_dev, "can't register root hub for %s, %d\n", |
7071a3ce | 979 | dev_name(&usb_dev->dev), retval); |
1da177e4 | 980 | } |
4186ecf8 | 981 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 LT |
982 | |
983 | if (retval == 0) { | |
984 | spin_lock_irq (&hcd_root_hub_lock); | |
985 | hcd->rh_registered = 1; | |
986 | spin_unlock_irq (&hcd_root_hub_lock); | |
987 | ||
988 | /* Did the HC die before the root hub was registered? */ | |
9b37596a | 989 | if (HCD_DEAD(hcd) || hcd->state == HC_STATE_HALT) |
1da177e4 LT |
990 | usb_hc_died (hcd); /* This time clean up */ |
991 | } | |
992 | ||
993 | return retval; | |
994 | } | |
1da177e4 LT |
995 | |
996 | ||
997 | /*-------------------------------------------------------------------------*/ | |
998 | ||
999 | /** | |
1000 | * usb_calc_bus_time - approximate periodic transaction time in nanoseconds | |
1001 | * @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH} | |
1002 | * @is_input: true iff the transaction sends data to the host | |
1003 | * @isoc: true for isochronous transactions, false for interrupt ones | |
1004 | * @bytecount: how many bytes in the transaction. | |
1005 | * | |
1006 | * Returns approximate bus time in nanoseconds for a periodic transaction. | |
1007 | * See USB 2.0 spec section 5.11.3; only periodic transfers need to be | |
1008 | * scheduled in software, this function is only used for such scheduling. | |
1009 | */ | |
1010 | long usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount) | |
1011 | { | |
1012 | unsigned long tmp; | |
1013 | ||
1014 | switch (speed) { | |
1015 | case USB_SPEED_LOW: /* INTR only */ | |
1016 | if (is_input) { | |
1017 | tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
1018 | return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); | |
1019 | } else { | |
1020 | tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
1021 | return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp); | |
1022 | } | |
1023 | case USB_SPEED_FULL: /* ISOC or INTR */ | |
1024 | if (isoc) { | |
1025 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
1026 | return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp); | |
1027 | } else { | |
1028 | tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L; | |
1029 | return (9107L + BW_HOST_DELAY + tmp); | |
1030 | } | |
1031 | case USB_SPEED_HIGH: /* ISOC or INTR */ | |
1032 | // FIXME adjust for input vs output | |
1033 | if (isoc) | |
498f78e6 | 1034 | tmp = HS_NSECS_ISO (bytecount); |
1da177e4 | 1035 | else |
498f78e6 | 1036 | tmp = HS_NSECS (bytecount); |
1da177e4 LT |
1037 | return tmp; |
1038 | default: | |
1039 | pr_debug ("%s: bogus device speed!\n", usbcore_name); | |
1040 | return -1; | |
1041 | } | |
1042 | } | |
782e70c6 | 1043 | EXPORT_SYMBOL_GPL(usb_calc_bus_time); |
1da177e4 | 1044 | |
1da177e4 LT |
1045 | |
1046 | /*-------------------------------------------------------------------------*/ | |
1047 | ||
1048 | /* | |
1049 | * Generic HC operations. | |
1050 | */ | |
1051 | ||
1052 | /*-------------------------------------------------------------------------*/ | |
1053 | ||
e9df41c5 AS |
1054 | /** |
1055 | * usb_hcd_link_urb_to_ep - add an URB to its endpoint queue | |
1056 | * @hcd: host controller to which @urb was submitted | |
1057 | * @urb: URB being submitted | |
1058 | * | |
1059 | * Host controller drivers should call this routine in their enqueue() | |
1060 | * method. The HCD's private spinlock must be held and interrupts must | |
1061 | * be disabled. The actions carried out here are required for URB | |
1062 | * submission, as well as for endpoint shutdown and for usb_kill_urb. | |
1063 | * | |
1064 | * Returns 0 for no error, otherwise a negative error code (in which case | |
1065 | * the enqueue() method must fail). If no error occurs but enqueue() fails | |
1066 | * anyway, it must call usb_hcd_unlink_urb_from_ep() before releasing | |
1067 | * the private spinlock and returning. | |
1068 | */ | |
1069 | int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb) | |
1da177e4 | 1070 | { |
9a9bf406 | 1071 | int rc = 0; |
1da177e4 | 1072 | |
e9df41c5 | 1073 | spin_lock(&hcd_urb_list_lock); |
1da177e4 | 1074 | |
9a9bf406 | 1075 | /* Check that the URB isn't being killed */ |
49367d8f | 1076 | if (unlikely(atomic_read(&urb->reject))) { |
9a9bf406 AS |
1077 | rc = -EPERM; |
1078 | goto done; | |
9f6a93f7 | 1079 | } |
1da177e4 | 1080 | |
9a9bf406 AS |
1081 | if (unlikely(!urb->ep->enabled)) { |
1082 | rc = -ENOENT; | |
1083 | goto done; | |
1084 | } | |
1da177e4 | 1085 | |
6840d255 AS |
1086 | if (unlikely(!urb->dev->can_submit)) { |
1087 | rc = -EHOSTUNREACH; | |
1088 | goto done; | |
1089 | } | |
1090 | ||
1da177e4 | 1091 | /* |
9a9bf406 AS |
1092 | * Check the host controller's state and add the URB to the |
1093 | * endpoint's queue. | |
1da177e4 | 1094 | */ |
9b37596a | 1095 | if (HCD_RH_RUNNING(hcd)) { |
eb231054 | 1096 | urb->unlinked = 0; |
9a9bf406 | 1097 | list_add_tail(&urb->urb_list, &urb->ep->urb_list); |
9b37596a | 1098 | } else { |
9a9bf406 AS |
1099 | rc = -ESHUTDOWN; |
1100 | goto done; | |
1da177e4 | 1101 | } |
9a9bf406 | 1102 | done: |
e9df41c5 | 1103 | spin_unlock(&hcd_urb_list_lock); |
9a9bf406 AS |
1104 | return rc; |
1105 | } | |
e9df41c5 | 1106 | EXPORT_SYMBOL_GPL(usb_hcd_link_urb_to_ep); |
9a9bf406 | 1107 | |
e9df41c5 AS |
1108 | /** |
1109 | * usb_hcd_check_unlink_urb - check whether an URB may be unlinked | |
1110 | * @hcd: host controller to which @urb was submitted | |
1111 | * @urb: URB being checked for unlinkability | |
1112 | * @status: error code to store in @urb if the unlink succeeds | |
1113 | * | |
1114 | * Host controller drivers should call this routine in their dequeue() | |
1115 | * method. The HCD's private spinlock must be held and interrupts must | |
1116 | * be disabled. The actions carried out here are required for making | |
1117 | * sure than an unlink is valid. | |
1118 | * | |
1119 | * Returns 0 for no error, otherwise a negative error code (in which case | |
1120 | * the dequeue() method must fail). The possible error codes are: | |
1121 | * | |
1122 | * -EIDRM: @urb was not submitted or has already completed. | |
1123 | * The completion function may not have been called yet. | |
1124 | * | |
1125 | * -EBUSY: @urb has already been unlinked. | |
1126 | */ | |
1127 | int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, | |
9a9bf406 AS |
1128 | int status) |
1129 | { | |
9a9bf406 | 1130 | struct list_head *tmp; |
9a9bf406 AS |
1131 | |
1132 | /* insist the urb is still queued */ | |
1133 | list_for_each(tmp, &urb->ep->urb_list) { | |
1134 | if (tmp == &urb->urb_list) | |
1135 | break; | |
1136 | } | |
e9df41c5 AS |
1137 | if (tmp != &urb->urb_list) |
1138 | return -EIDRM; | |
1da177e4 | 1139 | |
9a9bf406 AS |
1140 | /* Any status except -EINPROGRESS means something already started to |
1141 | * unlink this URB from the hardware. So there's no more work to do. | |
1da177e4 | 1142 | */ |
eb231054 | 1143 | if (urb->unlinked) |
e9df41c5 | 1144 | return -EBUSY; |
eb231054 | 1145 | urb->unlinked = status; |
1da177e4 | 1146 | |
9a9bf406 AS |
1147 | /* IRQ setup can easily be broken so that USB controllers |
1148 | * never get completion IRQs ... maybe even the ones we need to | |
1149 | * finish unlinking the initial failed usb_set_address() | |
1150 | * or device descriptor fetch. | |
1151 | */ | |
541c7d43 | 1152 | if (!HCD_SAW_IRQ(hcd) && !is_root_hub(urb->dev)) { |
9a9bf406 AS |
1153 | dev_warn(hcd->self.controller, "Unlink after no-IRQ? " |
1154 | "Controller is probably using the wrong IRQ.\n"); | |
1155 | set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); | |
ff9d78b3 SS |
1156 | if (hcd->shared_hcd) |
1157 | set_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags); | |
9a9bf406 AS |
1158 | } |
1159 | ||
e9df41c5 | 1160 | return 0; |
9a9bf406 | 1161 | } |
e9df41c5 | 1162 | EXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb); |
9a9bf406 | 1163 | |
e9df41c5 AS |
1164 | /** |
1165 | * usb_hcd_unlink_urb_from_ep - remove an URB from its endpoint queue | |
1166 | * @hcd: host controller to which @urb was submitted | |
1167 | * @urb: URB being unlinked | |
1168 | * | |
1169 | * Host controller drivers should call this routine before calling | |
1170 | * usb_hcd_giveback_urb(). The HCD's private spinlock must be held and | |
1171 | * interrupts must be disabled. The actions carried out here are required | |
1172 | * for URB completion. | |
1173 | */ | |
1174 | void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb) | |
9a9bf406 | 1175 | { |
9a9bf406 | 1176 | /* clear all state linking urb to this dev (and hcd) */ |
e9df41c5 | 1177 | spin_lock(&hcd_urb_list_lock); |
9a9bf406 | 1178 | list_del_init(&urb->urb_list); |
e9df41c5 | 1179 | spin_unlock(&hcd_urb_list_lock); |
9a9bf406 | 1180 | } |
e9df41c5 | 1181 | EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep); |
9a9bf406 | 1182 | |
b3476675 MD |
1183 | /* |
1184 | * Some usb host controllers can only perform dma using a small SRAM area. | |
1185 | * The usb core itself is however optimized for host controllers that can dma | |
1186 | * using regular system memory - like pci devices doing bus mastering. | |
1187 | * | |
1188 | * To support host controllers with limited dma capabilites we provide dma | |
1189 | * bounce buffers. This feature can be enabled using the HCD_LOCAL_MEM flag. | |
1190 | * For this to work properly the host controller code must first use the | |
1191 | * function dma_declare_coherent_memory() to point out which memory area | |
1192 | * that should be used for dma allocations. | |
1193 | * | |
1194 | * The HCD_LOCAL_MEM flag then tells the usb code to allocate all data for | |
1195 | * dma using dma_alloc_coherent() which in turn allocates from the memory | |
1196 | * area pointed out with dma_declare_coherent_memory(). | |
1197 | * | |
1198 | * So, to summarize... | |
1199 | * | |
1200 | * - We need "local" memory, canonical example being | |
1201 | * a small SRAM on a discrete controller being the | |
1202 | * only memory that the controller can read ... | |
1203 | * (a) "normal" kernel memory is no good, and | |
1204 | * (b) there's not enough to share | |
1205 | * | |
1206 | * - The only *portable* hook for such stuff in the | |
1207 | * DMA framework is dma_declare_coherent_memory() | |
1208 | * | |
1209 | * - So we use that, even though the primary requirement | |
1210 | * is that the memory be "local" (hence addressible | |
1211 | * by that device), not "coherent". | |
1212 | * | |
1213 | */ | |
1214 | ||
1215 | static int hcd_alloc_coherent(struct usb_bus *bus, | |
1216 | gfp_t mem_flags, dma_addr_t *dma_handle, | |
1217 | void **vaddr_handle, size_t size, | |
1218 | enum dma_data_direction dir) | |
1219 | { | |
1220 | unsigned char *vaddr; | |
1221 | ||
4307a28e AR |
1222 | if (*vaddr_handle == NULL) { |
1223 | WARN_ON_ONCE(1); | |
1224 | return -EFAULT; | |
1225 | } | |
1226 | ||
b3476675 MD |
1227 | vaddr = hcd_buffer_alloc(bus, size + sizeof(vaddr), |
1228 | mem_flags, dma_handle); | |
1229 | if (!vaddr) | |
1230 | return -ENOMEM; | |
1231 | ||
1232 | /* | |
1233 | * Store the virtual address of the buffer at the end | |
1234 | * of the allocated dma buffer. The size of the buffer | |
1235 | * may be uneven so use unaligned functions instead | |
1236 | * of just rounding up. It makes sense to optimize for | |
1237 | * memory footprint over access speed since the amount | |
1238 | * of memory available for dma may be limited. | |
1239 | */ | |
1240 | put_unaligned((unsigned long)*vaddr_handle, | |
1241 | (unsigned long *)(vaddr + size)); | |
1242 | ||
1243 | if (dir == DMA_TO_DEVICE) | |
1244 | memcpy(vaddr, *vaddr_handle, size); | |
1245 | ||
1246 | *vaddr_handle = vaddr; | |
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | static void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, | |
1251 | void **vaddr_handle, size_t size, | |
1252 | enum dma_data_direction dir) | |
1253 | { | |
1254 | unsigned char *vaddr = *vaddr_handle; | |
1255 | ||
1256 | vaddr = (void *)get_unaligned((unsigned long *)(vaddr + size)); | |
1257 | ||
1258 | if (dir == DMA_FROM_DEVICE) | |
1259 | memcpy(vaddr, *vaddr_handle, size); | |
1260 | ||
1261 | hcd_buffer_free(bus, size + sizeof(vaddr), *vaddr_handle, *dma_handle); | |
1262 | ||
1263 | *vaddr_handle = vaddr; | |
1264 | *dma_handle = 0; | |
1265 | } | |
1266 | ||
c8cf203a | 1267 | void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb) |
ff9c895f | 1268 | { |
ff9c895f AS |
1269 | if (urb->transfer_flags & URB_SETUP_MAP_SINGLE) |
1270 | dma_unmap_single(hcd->self.controller, | |
1271 | urb->setup_dma, | |
1272 | sizeof(struct usb_ctrlrequest), | |
1273 | DMA_TO_DEVICE); | |
1274 | else if (urb->transfer_flags & URB_SETUP_MAP_LOCAL) | |
1275 | hcd_free_coherent(urb->dev->bus, | |
1276 | &urb->setup_dma, | |
1277 | (void **) &urb->setup_packet, | |
1278 | sizeof(struct usb_ctrlrequest), | |
1279 | DMA_TO_DEVICE); | |
1280 | ||
1dae423d MF |
1281 | /* Make it safe to call this routine more than once */ |
1282 | urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL); | |
1283 | } | |
c8cf203a | 1284 | EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_setup_for_dma); |
1dae423d | 1285 | |
2694a48d RM |
1286 | static void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
1287 | { | |
1288 | if (hcd->driver->unmap_urb_for_dma) | |
1289 | hcd->driver->unmap_urb_for_dma(hcd, urb); | |
1290 | else | |
1291 | usb_hcd_unmap_urb_for_dma(hcd, urb); | |
1292 | } | |
1293 | ||
c8cf203a | 1294 | void usb_hcd_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) |
1dae423d MF |
1295 | { |
1296 | enum dma_data_direction dir; | |
1297 | ||
c8cf203a | 1298 | usb_hcd_unmap_urb_setup_for_dma(hcd, urb); |
1dae423d | 1299 | |
ff9c895f AS |
1300 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
1301 | if (urb->transfer_flags & URB_DMA_MAP_SG) | |
1302 | dma_unmap_sg(hcd->self.controller, | |
910f8d0c | 1303 | urb->sg, |
ff9c895f AS |
1304 | urb->num_sgs, |
1305 | dir); | |
1306 | else if (urb->transfer_flags & URB_DMA_MAP_PAGE) | |
1307 | dma_unmap_page(hcd->self.controller, | |
1308 | urb->transfer_dma, | |
1309 | urb->transfer_buffer_length, | |
1310 | dir); | |
1311 | else if (urb->transfer_flags & URB_DMA_MAP_SINGLE) | |
1312 | dma_unmap_single(hcd->self.controller, | |
1313 | urb->transfer_dma, | |
1314 | urb->transfer_buffer_length, | |
1315 | dir); | |
1316 | else if (urb->transfer_flags & URB_MAP_LOCAL) | |
1317 | hcd_free_coherent(urb->dev->bus, | |
1318 | &urb->transfer_dma, | |
1319 | &urb->transfer_buffer, | |
1320 | urb->transfer_buffer_length, | |
1321 | dir); | |
1322 | ||
1323 | /* Make it safe to call this routine more than once */ | |
1dae423d | 1324 | urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | |
ff9c895f AS |
1325 | URB_DMA_MAP_SINGLE | URB_MAP_LOCAL); |
1326 | } | |
c8cf203a | 1327 | EXPORT_SYMBOL_GPL(usb_hcd_unmap_urb_for_dma); |
ff9c895f | 1328 | |
b3476675 MD |
1329 | static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
1330 | gfp_t mem_flags) | |
2694a48d RM |
1331 | { |
1332 | if (hcd->driver->map_urb_for_dma) | |
1333 | return hcd->driver->map_urb_for_dma(hcd, urb, mem_flags); | |
1334 | else | |
1335 | return usb_hcd_map_urb_for_dma(hcd, urb, mem_flags); | |
1336 | } | |
1337 | ||
1338 | int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, | |
1339 | gfp_t mem_flags) | |
9a9bf406 | 1340 | { |
b3476675 MD |
1341 | enum dma_data_direction dir; |
1342 | int ret = 0; | |
1343 | ||
9a9bf406 AS |
1344 | /* Map the URB's buffers for DMA access. |
1345 | * Lower level HCD code should use *_dma exclusively, | |
e04748e3 SS |
1346 | * unless it uses pio or talks to another transport, |
1347 | * or uses the provided scatter gather list for bulk. | |
1da177e4 | 1348 | */ |
b3476675 | 1349 | |
85bcb5ee | 1350 | if (usb_endpoint_xfer_control(&urb->ep->desc)) { |
07a8cdd2 AG |
1351 | if (hcd->self.uses_pio_for_control) |
1352 | return ret; | |
85e034fd | 1353 | if (hcd->self.uses_dma) { |
b3476675 | 1354 | urb->setup_dma = dma_map_single( |
1da177e4 LT |
1355 | hcd->self.controller, |
1356 | urb->setup_packet, | |
b3476675 | 1357 | sizeof(struct usb_ctrlrequest), |
1da177e4 | 1358 | DMA_TO_DEVICE); |
85e034fd LF |
1359 | if (dma_mapping_error(hcd->self.controller, |
1360 | urb->setup_dma)) | |
1361 | return -EAGAIN; | |
ff9c895f | 1362 | urb->transfer_flags |= URB_SETUP_MAP_SINGLE; |
f537da68 | 1363 | } else if (hcd->driver->flags & HCD_LOCAL_MEM) { |
b3476675 MD |
1364 | ret = hcd_alloc_coherent( |
1365 | urb->dev->bus, mem_flags, | |
1366 | &urb->setup_dma, | |
1367 | (void **)&urb->setup_packet, | |
1368 | sizeof(struct usb_ctrlrequest), | |
1369 | DMA_TO_DEVICE); | |
ff9c895f AS |
1370 | if (ret) |
1371 | return ret; | |
1372 | urb->transfer_flags |= URB_SETUP_MAP_LOCAL; | |
f537da68 | 1373 | } |
b3476675 MD |
1374 | } |
1375 | ||
1376 | dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; | |
ff9c895f | 1377 | if (urb->transfer_buffer_length != 0 |
b3476675 | 1378 | && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { |
85e034fd | 1379 | if (hcd->self.uses_dma) { |
ff9c895f AS |
1380 | if (urb->num_sgs) { |
1381 | int n = dma_map_sg( | |
1382 | hcd->self.controller, | |
910f8d0c | 1383 | urb->sg, |
ff9c895f AS |
1384 | urb->num_sgs, |
1385 | dir); | |
1386 | if (n <= 0) | |
1387 | ret = -EAGAIN; | |
1388 | else | |
1389 | urb->transfer_flags |= URB_DMA_MAP_SG; | |
1390 | if (n != urb->num_sgs) { | |
1391 | urb->num_sgs = n; | |
1392 | urb->transfer_flags |= | |
1393 | URB_DMA_SG_COMBINED; | |
1394 | } | |
1395 | } else if (urb->sg) { | |
910f8d0c | 1396 | struct scatterlist *sg = urb->sg; |
ff9c895f AS |
1397 | urb->transfer_dma = dma_map_page( |
1398 | hcd->self.controller, | |
1399 | sg_page(sg), | |
1400 | sg->offset, | |
1401 | urb->transfer_buffer_length, | |
1402 | dir); | |
1403 | if (dma_mapping_error(hcd->self.controller, | |
85e034fd | 1404 | urb->transfer_dma)) |
ff9c895f AS |
1405 | ret = -EAGAIN; |
1406 | else | |
1407 | urb->transfer_flags |= URB_DMA_MAP_PAGE; | |
1408 | } else { | |
1409 | urb->transfer_dma = dma_map_single( | |
1410 | hcd->self.controller, | |
1411 | urb->transfer_buffer, | |
1412 | urb->transfer_buffer_length, | |
1413 | dir); | |
1414 | if (dma_mapping_error(hcd->self.controller, | |
1415 | urb->transfer_dma)) | |
1416 | ret = -EAGAIN; | |
1417 | else | |
1418 | urb->transfer_flags |= URB_DMA_MAP_SINGLE; | |
1419 | } | |
85e034fd | 1420 | } else if (hcd->driver->flags & HCD_LOCAL_MEM) { |
b3476675 MD |
1421 | ret = hcd_alloc_coherent( |
1422 | urb->dev->bus, mem_flags, | |
1423 | &urb->transfer_dma, | |
1424 | &urb->transfer_buffer, | |
1425 | urb->transfer_buffer_length, | |
1426 | dir); | |
ff9c895f AS |
1427 | if (ret == 0) |
1428 | urb->transfer_flags |= URB_MAP_LOCAL; | |
b3476675 | 1429 | } |
ff9c895f AS |
1430 | if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE | |
1431 | URB_SETUP_MAP_LOCAL))) | |
c8cf203a | 1432 | usb_hcd_unmap_urb_for_dma(hcd, urb); |
1da177e4 | 1433 | } |
b3476675 | 1434 | return ret; |
9a9bf406 | 1435 | } |
2694a48d | 1436 | EXPORT_SYMBOL_GPL(usb_hcd_map_urb_for_dma); |
1da177e4 | 1437 | |
9a9bf406 AS |
1438 | /*-------------------------------------------------------------------------*/ |
1439 | ||
1440 | /* may be called in any context with a valid urb->dev usecount | |
1441 | * caller surrenders "ownership" of urb | |
1442 | * expects usb_submit_urb() to have sanity checked and conditioned all | |
1443 | * inputs in the urb | |
1444 | */ | |
1445 | int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags) | |
1446 | { | |
1447 | int status; | |
1448 | struct usb_hcd *hcd = bus_to_hcd(urb->dev->bus); | |
1449 | ||
1450 | /* increment urb's reference count as part of giving it to the HCD | |
1451 | * (which will control it). HCD guarantees that it either returns | |
1452 | * an error or calls giveback(), but not both. | |
1453 | */ | |
1454 | usb_get_urb(urb); | |
1455 | atomic_inc(&urb->use_count); | |
4d59d8a1 | 1456 | atomic_inc(&urb->dev->urbnum); |
9a9bf406 AS |
1457 | usbmon_urb_submit(&hcd->self, urb); |
1458 | ||
1459 | /* NOTE requirements on root-hub callers (usbfs and the hub | |
1460 | * driver, for now): URBs' urb->transfer_buffer must be | |
1461 | * valid and usb_buffer_{sync,unmap}() not be needed, since | |
1462 | * they could clobber root hub response data. Also, control | |
1463 | * URBs must be submitted in process context with interrupts | |
1464 | * enabled. | |
1465 | */ | |
b3476675 | 1466 | |
ff9c895f | 1467 | if (is_root_hub(urb->dev)) { |
e9df41c5 | 1468 | status = rh_urb_enqueue(hcd, urb); |
ff9c895f AS |
1469 | } else { |
1470 | status = map_urb_for_dma(hcd, urb, mem_flags); | |
1471 | if (likely(status == 0)) { | |
1472 | status = hcd->driver->urb_enqueue(hcd, urb, mem_flags); | |
1473 | if (unlikely(status)) | |
2694a48d | 1474 | unmap_urb_for_dma(hcd, urb); |
ff9c895f AS |
1475 | } |
1476 | } | |
9a9bf406 AS |
1477 | |
1478 | if (unlikely(status)) { | |
1da177e4 | 1479 | usbmon_urb_submit_error(&hcd->self, urb, status); |
b0d9efba | 1480 | urb->hcpriv = NULL; |
9a9bf406 AS |
1481 | INIT_LIST_HEAD(&urb->urb_list); |
1482 | atomic_dec(&urb->use_count); | |
4d59d8a1 | 1483 | atomic_dec(&urb->dev->urbnum); |
49367d8f | 1484 | if (atomic_read(&urb->reject)) |
9a9bf406 AS |
1485 | wake_up(&usb_kill_urb_queue); |
1486 | usb_put_urb(urb); | |
1da177e4 LT |
1487 | } |
1488 | return status; | |
1489 | } | |
1490 | ||
1491 | /*-------------------------------------------------------------------------*/ | |
1492 | ||
1da177e4 LT |
1493 | /* this makes the hcd giveback() the urb more quickly, by kicking it |
1494 | * off hardware queues (which may take a while) and returning it as | |
1495 | * soon as practical. we've already set up the urb's return status, | |
1496 | * but we can't know if the callback completed already. | |
1497 | */ | |
e9df41c5 | 1498 | static int unlink1(struct usb_hcd *hcd, struct urb *urb, int status) |
1da177e4 LT |
1499 | { |
1500 | int value; | |
1501 | ||
809a58b8 | 1502 | if (is_root_hub(urb->dev)) |
e9df41c5 | 1503 | value = usb_rh_urb_dequeue(hcd, urb, status); |
1da177e4 LT |
1504 | else { |
1505 | ||
1506 | /* The only reason an HCD might fail this call is if | |
1507 | * it has not yet fully queued the urb to begin with. | |
1508 | * Such failures should be harmless. */ | |
e9df41c5 | 1509 | value = hcd->driver->urb_dequeue(hcd, urb, status); |
1da177e4 | 1510 | } |
1da177e4 LT |
1511 | return value; |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * called in any context | |
1516 | * | |
1517 | * caller guarantees urb won't be recycled till both unlink() | |
1518 | * and the urb's completion function return | |
1519 | */ | |
a6d2bb9f | 1520 | int usb_hcd_unlink_urb (struct urb *urb, int status) |
1da177e4 | 1521 | { |
9a9bf406 | 1522 | struct usb_hcd *hcd; |
cde217a5 AS |
1523 | int retval = -EIDRM; |
1524 | unsigned long flags; | |
1da177e4 | 1525 | |
cde217a5 AS |
1526 | /* Prevent the device and bus from going away while |
1527 | * the unlink is carried out. If they are already gone | |
1528 | * then urb->use_count must be 0, since disconnected | |
1529 | * devices can't have any active URBs. | |
1530 | */ | |
1531 | spin_lock_irqsave(&hcd_urb_unlink_lock, flags); | |
1532 | if (atomic_read(&urb->use_count) > 0) { | |
1533 | retval = 0; | |
1534 | usb_get_dev(urb->dev); | |
1535 | } | |
1536 | spin_unlock_irqrestore(&hcd_urb_unlink_lock, flags); | |
1537 | if (retval == 0) { | |
1538 | hcd = bus_to_hcd(urb->dev->bus); | |
1539 | retval = unlink1(hcd, urb, status); | |
1540 | usb_put_dev(urb->dev); | |
1541 | } | |
1da177e4 | 1542 | |
1da177e4 LT |
1543 | if (retval == 0) |
1544 | retval = -EINPROGRESS; | |
e9df41c5 | 1545 | else if (retval != -EIDRM && retval != -EBUSY) |
9a9bf406 AS |
1546 | dev_dbg(&urb->dev->dev, "hcd_unlink_urb %p fail %d\n", |
1547 | urb, retval); | |
1da177e4 LT |
1548 | return retval; |
1549 | } | |
1550 | ||
1551 | /*-------------------------------------------------------------------------*/ | |
1552 | ||
32aca560 AS |
1553 | /** |
1554 | * usb_hcd_giveback_urb - return URB from HCD to device driver | |
1555 | * @hcd: host controller returning the URB | |
1556 | * @urb: urb being returned to the USB device driver. | |
4a00027d | 1557 | * @status: completion status code for the URB. |
32aca560 AS |
1558 | * Context: in_interrupt() |
1559 | * | |
1560 | * This hands the URB from HCD to its USB device driver, using its | |
1561 | * completion function. The HCD has freed all per-urb resources | |
1562 | * (and is done using urb->hcpriv). It also released all HCD locks; | |
1563 | * the device driver won't cause problems if it frees, modifies, | |
1564 | * or resubmits this URB. | |
eb231054 | 1565 | * |
4a00027d | 1566 | * If @urb was unlinked, the value of @status will be overridden by |
eb231054 AS |
1567 | * @urb->unlinked. Erroneous short transfers are detected in case |
1568 | * the HCD hasn't checked for them. | |
32aca560 | 1569 | */ |
4a00027d | 1570 | void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status) |
32aca560 | 1571 | { |
b0d9efba | 1572 | urb->hcpriv = NULL; |
eb231054 | 1573 | if (unlikely(urb->unlinked)) |
4a00027d | 1574 | status = urb->unlinked; |
eb231054 | 1575 | else if (unlikely((urb->transfer_flags & URB_SHORT_NOT_OK) && |
b0d9efba | 1576 | urb->actual_length < urb->transfer_buffer_length && |
4a00027d AS |
1577 | !status)) |
1578 | status = -EREMOTEIO; | |
32aca560 | 1579 | |
2694a48d | 1580 | unmap_urb_for_dma(hcd, urb); |
4a00027d | 1581 | usbmon_urb_complete(&hcd->self, urb, status); |
1f5a3d0f AS |
1582 | usb_unanchor_urb(urb); |
1583 | ||
32aca560 | 1584 | /* pass ownership to the completion handler */ |
4a00027d | 1585 | urb->status = status; |
32aca560 AS |
1586 | urb->complete (urb); |
1587 | atomic_dec (&urb->use_count); | |
49367d8f | 1588 | if (unlikely(atomic_read(&urb->reject))) |
32aca560 AS |
1589 | wake_up (&usb_kill_urb_queue); |
1590 | usb_put_urb (urb); | |
1591 | } | |
782e70c6 | 1592 | EXPORT_SYMBOL_GPL(usb_hcd_giveback_urb); |
32aca560 AS |
1593 | |
1594 | /*-------------------------------------------------------------------------*/ | |
1595 | ||
95cf82f9 AS |
1596 | /* Cancel all URBs pending on this endpoint and wait for the endpoint's |
1597 | * queue to drain completely. The caller must first insure that no more | |
1598 | * URBs can be submitted for this endpoint. | |
1da177e4 | 1599 | */ |
95cf82f9 | 1600 | void usb_hcd_flush_endpoint(struct usb_device *udev, |
a6d2bb9f | 1601 | struct usb_host_endpoint *ep) |
1da177e4 LT |
1602 | { |
1603 | struct usb_hcd *hcd; | |
1604 | struct urb *urb; | |
1605 | ||
95cf82f9 AS |
1606 | if (!ep) |
1607 | return; | |
9a9bf406 | 1608 | might_sleep(); |
17200583 | 1609 | hcd = bus_to_hcd(udev->bus); |
1da177e4 | 1610 | |
95cf82f9 | 1611 | /* No more submits can occur */ |
9a9bf406 | 1612 | spin_lock_irq(&hcd_urb_list_lock); |
ddc1fd6a | 1613 | rescan: |
1da177e4 | 1614 | list_for_each_entry (urb, &ep->urb_list, urb_list) { |
5e60a161 | 1615 | int is_in; |
1da177e4 | 1616 | |
eb231054 | 1617 | if (urb->unlinked) |
1da177e4 LT |
1618 | continue; |
1619 | usb_get_urb (urb); | |
5e60a161 | 1620 | is_in = usb_urb_dir_in(urb); |
809a58b8 | 1621 | spin_unlock(&hcd_urb_list_lock); |
1da177e4 | 1622 | |
e9df41c5 AS |
1623 | /* kick hcd */ |
1624 | unlink1(hcd, urb, -ESHUTDOWN); | |
1625 | dev_dbg (hcd->self.controller, | |
1626 | "shutdown urb %p ep%d%s%s\n", | |
1627 | urb, usb_endpoint_num(&ep->desc), | |
1628 | is_in ? "in" : "out", | |
1629 | ({ char *s; | |
1630 | ||
1631 | switch (usb_endpoint_type(&ep->desc)) { | |
1632 | case USB_ENDPOINT_XFER_CONTROL: | |
1633 | s = ""; break; | |
1634 | case USB_ENDPOINT_XFER_BULK: | |
1635 | s = "-bulk"; break; | |
1636 | case USB_ENDPOINT_XFER_INT: | |
1637 | s = "-intr"; break; | |
1638 | default: | |
1639 | s = "-iso"; break; | |
1640 | }; | |
1641 | s; | |
1642 | })); | |
1da177e4 LT |
1643 | usb_put_urb (urb); |
1644 | ||
1645 | /* list contents may have changed */ | |
ddc1fd6a | 1646 | spin_lock(&hcd_urb_list_lock); |
1da177e4 LT |
1647 | goto rescan; |
1648 | } | |
9a9bf406 | 1649 | spin_unlock_irq(&hcd_urb_list_lock); |
1da177e4 | 1650 | |
95cf82f9 | 1651 | /* Wait until the endpoint queue is completely empty */ |
455b25fb | 1652 | while (!list_empty (&ep->urb_list)) { |
809a58b8 | 1653 | spin_lock_irq(&hcd_urb_list_lock); |
455b25fb AS |
1654 | |
1655 | /* The list may have changed while we acquired the spinlock */ | |
1656 | urb = NULL; | |
1657 | if (!list_empty (&ep->urb_list)) { | |
1658 | urb = list_entry (ep->urb_list.prev, struct urb, | |
1659 | urb_list); | |
1660 | usb_get_urb (urb); | |
1661 | } | |
809a58b8 | 1662 | spin_unlock_irq(&hcd_urb_list_lock); |
455b25fb AS |
1663 | |
1664 | if (urb) { | |
1665 | usb_kill_urb (urb); | |
1666 | usb_put_urb (urb); | |
1667 | } | |
1668 | } | |
1da177e4 LT |
1669 | } |
1670 | ||
3f0479e0 | 1671 | /** |
70445ae6 RD |
1672 | * usb_hcd_alloc_bandwidth - check whether a new bandwidth setting exceeds |
1673 | * the bus bandwidth | |
1674 | * @udev: target &usb_device | |
3f0479e0 SS |
1675 | * @new_config: new configuration to install |
1676 | * @cur_alt: the current alternate interface setting | |
1677 | * @new_alt: alternate interface setting that is being installed | |
1678 | * | |
1679 | * To change configurations, pass in the new configuration in new_config, | |
1680 | * and pass NULL for cur_alt and new_alt. | |
1681 | * | |
1682 | * To reset a device's configuration (put the device in the ADDRESSED state), | |
1683 | * pass in NULL for new_config, cur_alt, and new_alt. | |
1684 | * | |
1685 | * To change alternate interface settings, pass in NULL for new_config, | |
1686 | * pass in the current alternate interface setting in cur_alt, | |
1687 | * and pass in the new alternate interface setting in new_alt. | |
1688 | * | |
1689 | * Returns an error if the requested bandwidth change exceeds the | |
1690 | * bus bandwidth or host controller internal resources. | |
79abb1ab | 1691 | */ |
3f0479e0 | 1692 | int usb_hcd_alloc_bandwidth(struct usb_device *udev, |
79abb1ab | 1693 | struct usb_host_config *new_config, |
3f0479e0 SS |
1694 | struct usb_host_interface *cur_alt, |
1695 | struct usb_host_interface *new_alt) | |
79abb1ab SS |
1696 | { |
1697 | int num_intfs, i, j; | |
576a362a | 1698 | struct usb_host_interface *alt = NULL; |
79abb1ab SS |
1699 | int ret = 0; |
1700 | struct usb_hcd *hcd; | |
1701 | struct usb_host_endpoint *ep; | |
1702 | ||
1703 | hcd = bus_to_hcd(udev->bus); | |
1704 | if (!hcd->driver->check_bandwidth) | |
1705 | return 0; | |
1706 | ||
1707 | /* Configuration is being removed - set configuration 0 */ | |
3f0479e0 | 1708 | if (!new_config && !cur_alt) { |
79abb1ab SS |
1709 | for (i = 1; i < 16; ++i) { |
1710 | ep = udev->ep_out[i]; | |
1711 | if (ep) | |
1712 | hcd->driver->drop_endpoint(hcd, udev, ep); | |
1713 | ep = udev->ep_in[i]; | |
1714 | if (ep) | |
1715 | hcd->driver->drop_endpoint(hcd, udev, ep); | |
1716 | } | |
1717 | hcd->driver->check_bandwidth(hcd, udev); | |
1718 | return 0; | |
1719 | } | |
1720 | /* Check if the HCD says there's enough bandwidth. Enable all endpoints | |
1721 | * each interface's alt setting 0 and ask the HCD to check the bandwidth | |
1722 | * of the bus. There will always be bandwidth for endpoint 0, so it's | |
1723 | * ok to exclude it. | |
1724 | */ | |
1725 | if (new_config) { | |
1726 | num_intfs = new_config->desc.bNumInterfaces; | |
1727 | /* Remove endpoints (except endpoint 0, which is always on the | |
1728 | * schedule) from the old config from the schedule | |
1729 | */ | |
1730 | for (i = 1; i < 16; ++i) { | |
1731 | ep = udev->ep_out[i]; | |
1732 | if (ep) { | |
1733 | ret = hcd->driver->drop_endpoint(hcd, udev, ep); | |
1734 | if (ret < 0) | |
1735 | goto reset; | |
1736 | } | |
1737 | ep = udev->ep_in[i]; | |
1738 | if (ep) { | |
1739 | ret = hcd->driver->drop_endpoint(hcd, udev, ep); | |
1740 | if (ret < 0) | |
1741 | goto reset; | |
1742 | } | |
1743 | } | |
1744 | for (i = 0; i < num_intfs; ++i) { | |
d837e219 SS |
1745 | struct usb_host_interface *first_alt; |
1746 | int iface_num; | |
1747 | ||
1748 | first_alt = &new_config->intf_cache[i]->altsetting[0]; | |
1749 | iface_num = first_alt->desc.bInterfaceNumber; | |
91017f9c | 1750 | /* Set up endpoints for alternate interface setting 0 */ |
d837e219 | 1751 | alt = usb_find_alt_setting(new_config, iface_num, 0); |
3f0479e0 SS |
1752 | if (!alt) |
1753 | /* No alt setting 0? Pick the first setting. */ | |
d837e219 | 1754 | alt = first_alt; |
3f0479e0 | 1755 | |
79abb1ab SS |
1756 | for (j = 0; j < alt->desc.bNumEndpoints; j++) { |
1757 | ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]); | |
1758 | if (ret < 0) | |
1759 | goto reset; | |
1760 | } | |
1761 | } | |
1762 | } | |
3f0479e0 | 1763 | if (cur_alt && new_alt) { |
04a723ea SS |
1764 | struct usb_interface *iface = usb_ifnum_to_if(udev, |
1765 | cur_alt->desc.bInterfaceNumber); | |
1766 | ||
1767 | if (iface->resetting_device) { | |
1768 | /* | |
1769 | * The USB core just reset the device, so the xHCI host | |
1770 | * and the device will think alt setting 0 is installed. | |
1771 | * However, the USB core will pass in the alternate | |
1772 | * setting installed before the reset as cur_alt. Dig | |
1773 | * out the alternate setting 0 structure, or the first | |
1774 | * alternate setting if a broken device doesn't have alt | |
1775 | * setting 0. | |
1776 | */ | |
1777 | cur_alt = usb_altnum_to_altsetting(iface, 0); | |
1778 | if (!cur_alt) | |
1779 | cur_alt = &iface->altsetting[0]; | |
1780 | } | |
1781 | ||
3f0479e0 SS |
1782 | /* Drop all the endpoints in the current alt setting */ |
1783 | for (i = 0; i < cur_alt->desc.bNumEndpoints; i++) { | |
1784 | ret = hcd->driver->drop_endpoint(hcd, udev, | |
1785 | &cur_alt->endpoint[i]); | |
1786 | if (ret < 0) | |
1787 | goto reset; | |
1788 | } | |
1789 | /* Add all the endpoints in the new alt setting */ | |
1790 | for (i = 0; i < new_alt->desc.bNumEndpoints; i++) { | |
1791 | ret = hcd->driver->add_endpoint(hcd, udev, | |
1792 | &new_alt->endpoint[i]); | |
1793 | if (ret < 0) | |
1794 | goto reset; | |
1795 | } | |
1796 | } | |
79abb1ab SS |
1797 | ret = hcd->driver->check_bandwidth(hcd, udev); |
1798 | reset: | |
1799 | if (ret < 0) | |
1800 | hcd->driver->reset_bandwidth(hcd, udev); | |
1801 | return ret; | |
1802 | } | |
1803 | ||
95cf82f9 AS |
1804 | /* Disables the endpoint: synchronizes with the hcd to make sure all |
1805 | * endpoint state is gone from hardware. usb_hcd_flush_endpoint() must | |
1806 | * have been called previously. Use for set_configuration, set_interface, | |
1807 | * driver removal, physical disconnect. | |
1808 | * | |
1809 | * example: a qh stored in ep->hcpriv, holding state related to endpoint | |
1810 | * type, maxpacket size, toggle, halt status, and scheduling. | |
1811 | */ | |
1812 | void usb_hcd_disable_endpoint(struct usb_device *udev, | |
1813 | struct usb_host_endpoint *ep) | |
1814 | { | |
1815 | struct usb_hcd *hcd; | |
1816 | ||
1817 | might_sleep(); | |
1818 | hcd = bus_to_hcd(udev->bus); | |
1819 | if (hcd->driver->endpoint_disable) | |
1820 | hcd->driver->endpoint_disable(hcd, ep); | |
1821 | } | |
1822 | ||
3444b26a DV |
1823 | /** |
1824 | * usb_hcd_reset_endpoint - reset host endpoint state | |
1825 | * @udev: USB device. | |
1826 | * @ep: the endpoint to reset. | |
1827 | * | |
1828 | * Resets any host endpoint state such as the toggle bit, sequence | |
1829 | * number and current window. | |
1830 | */ | |
1831 | void usb_hcd_reset_endpoint(struct usb_device *udev, | |
1832 | struct usb_host_endpoint *ep) | |
1833 | { | |
1834 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
1835 | ||
1836 | if (hcd->driver->endpoint_reset) | |
1837 | hcd->driver->endpoint_reset(hcd, ep); | |
1838 | else { | |
1839 | int epnum = usb_endpoint_num(&ep->desc); | |
1840 | int is_out = usb_endpoint_dir_out(&ep->desc); | |
1841 | int is_control = usb_endpoint_xfer_control(&ep->desc); | |
1842 | ||
1843 | usb_settoggle(udev, epnum, is_out, 0); | |
1844 | if (is_control) | |
1845 | usb_settoggle(udev, epnum, !is_out, 0); | |
1846 | } | |
1847 | } | |
1848 | ||
eab1cafc SS |
1849 | /** |
1850 | * usb_alloc_streams - allocate bulk endpoint stream IDs. | |
1851 | * @interface: alternate setting that includes all endpoints. | |
1852 | * @eps: array of endpoints that need streams. | |
1853 | * @num_eps: number of endpoints in the array. | |
1854 | * @num_streams: number of streams to allocate. | |
1855 | * @mem_flags: flags hcd should use to allocate memory. | |
1856 | * | |
1857 | * Sets up a group of bulk endpoints to have num_streams stream IDs available. | |
1858 | * Drivers may queue multiple transfers to different stream IDs, which may | |
1859 | * complete in a different order than they were queued. | |
1860 | */ | |
1861 | int usb_alloc_streams(struct usb_interface *interface, | |
1862 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
1863 | unsigned int num_streams, gfp_t mem_flags) | |
1864 | { | |
1865 | struct usb_hcd *hcd; | |
1866 | struct usb_device *dev; | |
1867 | int i; | |
1868 | ||
1869 | dev = interface_to_usbdev(interface); | |
1870 | hcd = bus_to_hcd(dev->bus); | |
1871 | if (!hcd->driver->alloc_streams || !hcd->driver->free_streams) | |
1872 | return -EINVAL; | |
1873 | if (dev->speed != USB_SPEED_SUPER) | |
1874 | return -EINVAL; | |
1875 | ||
1876 | /* Streams only apply to bulk endpoints. */ | |
1877 | for (i = 0; i < num_eps; i++) | |
1878 | if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) | |
1879 | return -EINVAL; | |
1880 | ||
1881 | return hcd->driver->alloc_streams(hcd, dev, eps, num_eps, | |
1882 | num_streams, mem_flags); | |
1883 | } | |
1884 | EXPORT_SYMBOL_GPL(usb_alloc_streams); | |
1885 | ||
1886 | /** | |
1887 | * usb_free_streams - free bulk endpoint stream IDs. | |
1888 | * @interface: alternate setting that includes all endpoints. | |
1889 | * @eps: array of endpoints to remove streams from. | |
1890 | * @num_eps: number of endpoints in the array. | |
1891 | * @mem_flags: flags hcd should use to allocate memory. | |
1892 | * | |
1893 | * Reverts a group of bulk endpoints back to not using stream IDs. | |
1894 | * Can fail if we are given bad arguments, or HCD is broken. | |
1895 | */ | |
1896 | void usb_free_streams(struct usb_interface *interface, | |
1897 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
1898 | gfp_t mem_flags) | |
1899 | { | |
1900 | struct usb_hcd *hcd; | |
1901 | struct usb_device *dev; | |
1902 | int i; | |
1903 | ||
1904 | dev = interface_to_usbdev(interface); | |
1905 | hcd = bus_to_hcd(dev->bus); | |
1906 | if (dev->speed != USB_SPEED_SUPER) | |
1907 | return; | |
1908 | ||
1909 | /* Streams only apply to bulk endpoints. */ | |
1910 | for (i = 0; i < num_eps; i++) | |
1911 | if (!usb_endpoint_xfer_bulk(&eps[i]->desc)) | |
1912 | return; | |
1913 | ||
1914 | hcd->driver->free_streams(hcd, dev, eps, num_eps, mem_flags); | |
1915 | } | |
1916 | EXPORT_SYMBOL_GPL(usb_free_streams); | |
1917 | ||
cde217a5 AS |
1918 | /* Protect against drivers that try to unlink URBs after the device |
1919 | * is gone, by waiting until all unlinks for @udev are finished. | |
1920 | * Since we don't currently track URBs by device, simply wait until | |
1921 | * nothing is running in the locked region of usb_hcd_unlink_urb(). | |
1922 | */ | |
1923 | void usb_hcd_synchronize_unlinks(struct usb_device *udev) | |
1924 | { | |
1925 | spin_lock_irq(&hcd_urb_unlink_lock); | |
1926 | spin_unlock_irq(&hcd_urb_unlink_lock); | |
1927 | } | |
1928 | ||
1da177e4 LT |
1929 | /*-------------------------------------------------------------------------*/ |
1930 | ||
32aca560 AS |
1931 | /* called in any context */ |
1932 | int usb_hcd_get_frame_number (struct usb_device *udev) | |
1933 | { | |
1934 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
1935 | ||
9b37596a | 1936 | if (!HCD_RH_RUNNING(hcd)) |
32aca560 AS |
1937 | return -ESHUTDOWN; |
1938 | return hcd->driver->get_frame_number (hcd); | |
1939 | } | |
1940 | ||
1941 | /*-------------------------------------------------------------------------*/ | |
1942 | ||
9293677a | 1943 | #ifdef CONFIG_PM |
1da177e4 | 1944 | |
65bfd296 | 1945 | int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg) |
1da177e4 | 1946 | { |
686314cf AS |
1947 | struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); |
1948 | int status; | |
1949 | int old_state = hcd->state; | |
1da177e4 | 1950 | |
686314cf | 1951 | dev_dbg(&rhdev->dev, "bus %s%s\n", |
65bfd296 | 1952 | (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "suspend"); |
9b37596a AS |
1953 | if (HCD_DEAD(hcd)) { |
1954 | dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "suspend"); | |
1955 | return 0; | |
1956 | } | |
1957 | ||
686314cf AS |
1958 | if (!hcd->driver->bus_suspend) { |
1959 | status = -ENOENT; | |
1960 | } else { | |
9b37596a | 1961 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
686314cf AS |
1962 | hcd->state = HC_STATE_QUIESCING; |
1963 | status = hcd->driver->bus_suspend(hcd); | |
1964 | } | |
1965 | if (status == 0) { | |
1966 | usb_set_device_state(rhdev, USB_STATE_SUSPENDED); | |
9293677a | 1967 | hcd->state = HC_STATE_SUSPENDED; |
686314cf | 1968 | } else { |
9b37596a AS |
1969 | spin_lock_irq(&hcd_root_hub_lock); |
1970 | if (!HCD_DEAD(hcd)) { | |
1971 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); | |
1972 | hcd->state = old_state; | |
1973 | } | |
1974 | spin_unlock_irq(&hcd_root_hub_lock); | |
686314cf | 1975 | dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", |
9293677a | 1976 | "suspend", status); |
686314cf | 1977 | } |
9293677a | 1978 | return status; |
1da177e4 LT |
1979 | } |
1980 | ||
65bfd296 | 1981 | int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg) |
1da177e4 | 1982 | { |
686314cf AS |
1983 | struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self); |
1984 | int status; | |
cfa59dab | 1985 | int old_state = hcd->state; |
1da177e4 | 1986 | |
686314cf | 1987 | dev_dbg(&rhdev->dev, "usb %s%s\n", |
65bfd296 | 1988 | (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "resume"); |
9b37596a AS |
1989 | if (HCD_DEAD(hcd)) { |
1990 | dev_dbg(&rhdev->dev, "skipped %s of dead bus\n", "resume"); | |
1991 | return 0; | |
1992 | } | |
0c0382e3 | 1993 | if (!hcd->driver->bus_resume) |
9293677a | 1994 | return -ENOENT; |
9b37596a | 1995 | if (HCD_RH_RUNNING(hcd)) |
979d5199 | 1996 | return 0; |
686314cf | 1997 | |
9293677a | 1998 | hcd->state = HC_STATE_RESUMING; |
686314cf | 1999 | status = hcd->driver->bus_resume(hcd); |
bf3d7d40 | 2000 | clear_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); |
686314cf AS |
2001 | if (status == 0) { |
2002 | /* TRSMRCY = 10 msec */ | |
2003 | msleep(10); | |
9b37596a AS |
2004 | spin_lock_irq(&hcd_root_hub_lock); |
2005 | if (!HCD_DEAD(hcd)) { | |
2006 | usb_set_device_state(rhdev, rhdev->actconfig | |
2007 | ? USB_STATE_CONFIGURED | |
2008 | : USB_STATE_ADDRESS); | |
2009 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); | |
2010 | hcd->state = HC_STATE_RUNNING; | |
2011 | } | |
2012 | spin_unlock_irq(&hcd_root_hub_lock); | |
686314cf | 2013 | } else { |
cfa59dab | 2014 | hcd->state = old_state; |
686314cf | 2015 | dev_dbg(&rhdev->dev, "bus %s fail, err %d\n", |
9293677a | 2016 | "resume", status); |
cfa59dab AS |
2017 | if (status != -ESHUTDOWN) |
2018 | usb_hc_died(hcd); | |
9293677a DB |
2019 | } |
2020 | return status; | |
1da177e4 LT |
2021 | } |
2022 | ||
9bbdf1e0 AS |
2023 | #endif /* CONFIG_PM */ |
2024 | ||
2025 | #ifdef CONFIG_USB_SUSPEND | |
2026 | ||
6b157c9b AS |
2027 | /* Workqueue routine for root-hub remote wakeup */ |
2028 | static void hcd_resume_work(struct work_struct *work) | |
2029 | { | |
2030 | struct usb_hcd *hcd = container_of(work, struct usb_hcd, wakeup_work); | |
2031 | struct usb_device *udev = hcd->self.root_hub; | |
2032 | ||
2033 | usb_lock_device(udev); | |
0534d468 | 2034 | usb_remote_wakeup(udev); |
6b157c9b AS |
2035 | usb_unlock_device(udev); |
2036 | } | |
2037 | ||
1da177e4 LT |
2038 | /** |
2039 | * usb_hcd_resume_root_hub - called by HCD to resume its root hub | |
2040 | * @hcd: host controller for this root hub | |
2041 | * | |
2042 | * The USB host controller calls this function when its root hub is | |
2043 | * suspended (with the remote wakeup feature enabled) and a remote | |
6b157c9b AS |
2044 | * wakeup request is received. The routine submits a workqueue request |
2045 | * to resume the root hub (that is, manage its downstream ports again). | |
1da177e4 LT |
2046 | */ |
2047 | void usb_hcd_resume_root_hub (struct usb_hcd *hcd) | |
2048 | { | |
2049 | unsigned long flags; | |
2050 | ||
2051 | spin_lock_irqsave (&hcd_root_hub_lock, flags); | |
ff2f0787 AS |
2052 | if (hcd->rh_registered) { |
2053 | set_bit(HCD_FLAG_WAKEUP_PENDING, &hcd->flags); | |
9bbdf1e0 | 2054 | queue_work(pm_wq, &hcd->wakeup_work); |
ff2f0787 | 2055 | } |
1da177e4 LT |
2056 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
2057 | } | |
9293677a | 2058 | EXPORT_SYMBOL_GPL(usb_hcd_resume_root_hub); |
1da177e4 | 2059 | |
9bbdf1e0 | 2060 | #endif /* CONFIG_USB_SUSPEND */ |
1da177e4 LT |
2061 | |
2062 | /*-------------------------------------------------------------------------*/ | |
2063 | ||
2064 | #ifdef CONFIG_USB_OTG | |
2065 | ||
2066 | /** | |
2067 | * usb_bus_start_enum - start immediate enumeration (for OTG) | |
2068 | * @bus: the bus (must use hcd framework) | |
2069 | * @port_num: 1-based number of port; usually bus->otg_port | |
2070 | * Context: in_interrupt() | |
2071 | * | |
2072 | * Starts enumeration, with an immediate reset followed later by | |
2073 | * khubd identifying and possibly configuring the device. | |
2074 | * This is needed by OTG controller drivers, where it helps meet | |
2075 | * HNP protocol timing requirements for starting a port reset. | |
2076 | */ | |
2077 | int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num) | |
2078 | { | |
2079 | struct usb_hcd *hcd; | |
2080 | int status = -EOPNOTSUPP; | |
2081 | ||
2082 | /* NOTE: since HNP can't start by grabbing the bus's address0_sem, | |
2083 | * boards with root hubs hooked up to internal devices (instead of | |
2084 | * just the OTG port) may need more attention to resetting... | |
2085 | */ | |
2086 | hcd = container_of (bus, struct usb_hcd, self); | |
2087 | if (port_num && hcd->driver->start_port_reset) | |
2088 | status = hcd->driver->start_port_reset(hcd, port_num); | |
2089 | ||
2090 | /* run khubd shortly after (first) root port reset finishes; | |
2091 | * it may issue others, until at least 50 msecs have passed. | |
2092 | */ | |
2093 | if (status == 0) | |
2094 | mod_timer(&hcd->rh_timer, jiffies + msecs_to_jiffies(10)); | |
2095 | return status; | |
2096 | } | |
782e70c6 | 2097 | EXPORT_SYMBOL_GPL(usb_bus_start_enum); |
1da177e4 LT |
2098 | |
2099 | #endif | |
2100 | ||
2101 | /*-------------------------------------------------------------------------*/ | |
2102 | ||
1da177e4 LT |
2103 | /** |
2104 | * usb_hcd_irq - hook IRQs to HCD framework (bus glue) | |
2105 | * @irq: the IRQ being raised | |
2106 | * @__hcd: pointer to the HCD whose IRQ is being signaled | |
1da177e4 LT |
2107 | * |
2108 | * If the controller isn't HALTed, calls the driver's irq handler. | |
2109 | * Checks whether the controller is now dead. | |
2110 | */ | |
7d12e780 | 2111 | irqreturn_t usb_hcd_irq (int irq, void *__hcd) |
1da177e4 LT |
2112 | { |
2113 | struct usb_hcd *hcd = __hcd; | |
de85422b SB |
2114 | unsigned long flags; |
2115 | irqreturn_t rc; | |
1da177e4 | 2116 | |
de85422b SB |
2117 | /* IRQF_DISABLED doesn't work correctly with shared IRQs |
2118 | * when the first handler doesn't use it. So let's just | |
2119 | * assume it's never used. | |
2120 | */ | |
2121 | local_irq_save(flags); | |
1da177e4 | 2122 | |
9b37596a | 2123 | if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd))) { |
de85422b SB |
2124 | rc = IRQ_NONE; |
2125 | } else if (hcd->driver->irq(hcd) == IRQ_NONE) { | |
2126 | rc = IRQ_NONE; | |
2127 | } else { | |
2128 | set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags); | |
ff9d78b3 SS |
2129 | if (hcd->shared_hcd) |
2130 | set_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags); | |
8de98402 | 2131 | |
de85422b SB |
2132 | if (unlikely(hcd->state == HC_STATE_HALT)) |
2133 | usb_hc_died(hcd); | |
2134 | rc = IRQ_HANDLED; | |
2135 | } | |
2136 | ||
2137 | local_irq_restore(flags); | |
2138 | return rc; | |
1da177e4 | 2139 | } |
43b86af8 | 2140 | EXPORT_SYMBOL_GPL(usb_hcd_irq); |
1da177e4 LT |
2141 | |
2142 | /*-------------------------------------------------------------------------*/ | |
2143 | ||
2144 | /** | |
2145 | * usb_hc_died - report abnormal shutdown of a host controller (bus glue) | |
2146 | * @hcd: pointer to the HCD representing the controller | |
2147 | * | |
2148 | * This is called by bus glue to report a USB host controller that died | |
2149 | * while operations may still have been pending. It's called automatically | |
c5635437 SS |
2150 | * by the PCI glue, so only glue for non-PCI busses should need to call it. |
2151 | * | |
2152 | * Only call this function with the primary HCD. | |
1da177e4 LT |
2153 | */ |
2154 | void usb_hc_died (struct usb_hcd *hcd) | |
2155 | { | |
2156 | unsigned long flags; | |
2157 | ||
2158 | dev_err (hcd->self.controller, "HC died; cleaning up\n"); | |
2159 | ||
2160 | spin_lock_irqsave (&hcd_root_hub_lock, flags); | |
9b37596a AS |
2161 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
2162 | set_bit(HCD_FLAG_DEAD, &hcd->flags); | |
1da177e4 | 2163 | if (hcd->rh_registered) { |
541c7d43 | 2164 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
1da177e4 LT |
2165 | |
2166 | /* make khubd clean up old urbs and devices */ | |
2167 | usb_set_device_state (hcd->self.root_hub, | |
2168 | USB_STATE_NOTATTACHED); | |
2169 | usb_kick_khubd (hcd->self.root_hub); | |
2170 | } | |
c5635437 SS |
2171 | if (usb_hcd_is_primary_hcd(hcd) && hcd->shared_hcd) { |
2172 | hcd = hcd->shared_hcd; | |
2173 | if (hcd->rh_registered) { | |
2174 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
2175 | ||
2176 | /* make khubd clean up old urbs and devices */ | |
2177 | usb_set_device_state(hcd->self.root_hub, | |
2178 | USB_STATE_NOTATTACHED); | |
2179 | usb_kick_khubd(hcd->self.root_hub); | |
2180 | } | |
2181 | } | |
1da177e4 | 2182 | spin_unlock_irqrestore (&hcd_root_hub_lock, flags); |
c5635437 | 2183 | /* Make sure that the other roothub is also deallocated. */ |
1da177e4 LT |
2184 | } |
2185 | EXPORT_SYMBOL_GPL (usb_hc_died); | |
2186 | ||
2187 | /*-------------------------------------------------------------------------*/ | |
2188 | ||
1da177e4 | 2189 | /** |
c5635437 | 2190 | * usb_create_shared_hcd - create and initialize an HCD structure |
1da177e4 LT |
2191 | * @driver: HC driver that will use this hcd |
2192 | * @dev: device for this HC, stored in hcd->self.controller | |
2193 | * @bus_name: value to store in hcd->self.bus_name | |
c5635437 SS |
2194 | * @primary_hcd: a pointer to the usb_hcd structure that is sharing the |
2195 | * PCI device. Only allocate certain resources for the primary HCD | |
1da177e4 LT |
2196 | * Context: !in_interrupt() |
2197 | * | |
2198 | * Allocate a struct usb_hcd, with extra space at the end for the | |
2199 | * HC driver's private data. Initialize the generic members of the | |
2200 | * hcd structure. | |
2201 | * | |
2202 | * If memory is unavailable, returns NULL. | |
2203 | */ | |
c5635437 SS |
2204 | struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver, |
2205 | struct device *dev, const char *bus_name, | |
2206 | struct usb_hcd *primary_hcd) | |
1da177e4 LT |
2207 | { |
2208 | struct usb_hcd *hcd; | |
2209 | ||
7b842b6e | 2210 | hcd = kzalloc(sizeof(*hcd) + driver->hcd_priv_size, GFP_KERNEL); |
1da177e4 LT |
2211 | if (!hcd) { |
2212 | dev_dbg (dev, "hcd alloc failed\n"); | |
2213 | return NULL; | |
2214 | } | |
c5635437 SS |
2215 | if (primary_hcd == NULL) { |
2216 | hcd->bandwidth_mutex = kmalloc(sizeof(*hcd->bandwidth_mutex), | |
2217 | GFP_KERNEL); | |
2218 | if (!hcd->bandwidth_mutex) { | |
2219 | kfree(hcd); | |
2220 | dev_dbg(dev, "hcd bandwidth mutex alloc failed\n"); | |
2221 | return NULL; | |
2222 | } | |
2223 | mutex_init(hcd->bandwidth_mutex); | |
2224 | dev_set_drvdata(dev, hcd); | |
2225 | } else { | |
2226 | hcd->bandwidth_mutex = primary_hcd->bandwidth_mutex; | |
2227 | hcd->primary_hcd = primary_hcd; | |
2228 | primary_hcd->primary_hcd = primary_hcd; | |
2229 | hcd->shared_hcd = primary_hcd; | |
2230 | primary_hcd->shared_hcd = hcd; | |
d673bfcb | 2231 | } |
d673bfcb | 2232 | |
17200583 | 2233 | kref_init(&hcd->kref); |
1da177e4 LT |
2234 | |
2235 | usb_bus_init(&hcd->self); | |
1da177e4 LT |
2236 | hcd->self.controller = dev; |
2237 | hcd->self.bus_name = bus_name; | |
dd990f16 | 2238 | hcd->self.uses_dma = (dev->dma_mask != NULL); |
1da177e4 LT |
2239 | |
2240 | init_timer(&hcd->rh_timer); | |
d5926ae7 AS |
2241 | hcd->rh_timer.function = rh_timer_func; |
2242 | hcd->rh_timer.data = (unsigned long) hcd; | |
9bbdf1e0 | 2243 | #ifdef CONFIG_USB_SUSPEND |
6b157c9b AS |
2244 | INIT_WORK(&hcd->wakeup_work, hcd_resume_work); |
2245 | #endif | |
1da177e4 LT |
2246 | |
2247 | hcd->driver = driver; | |
83de4b2b | 2248 | hcd->speed = driver->flags & HCD_MASK; |
1da177e4 LT |
2249 | hcd->product_desc = (driver->product_desc) ? driver->product_desc : |
2250 | "USB Host Controller"; | |
1da177e4 LT |
2251 | return hcd; |
2252 | } | |
c5635437 SS |
2253 | EXPORT_SYMBOL_GPL(usb_create_shared_hcd); |
2254 | ||
2255 | /** | |
2256 | * usb_create_hcd - create and initialize an HCD structure | |
2257 | * @driver: HC driver that will use this hcd | |
2258 | * @dev: device for this HC, stored in hcd->self.controller | |
2259 | * @bus_name: value to store in hcd->self.bus_name | |
2260 | * Context: !in_interrupt() | |
2261 | * | |
2262 | * Allocate a struct usb_hcd, with extra space at the end for the | |
2263 | * HC driver's private data. Initialize the generic members of the | |
2264 | * hcd structure. | |
2265 | * | |
2266 | * If memory is unavailable, returns NULL. | |
2267 | */ | |
2268 | struct usb_hcd *usb_create_hcd(const struct hc_driver *driver, | |
2269 | struct device *dev, const char *bus_name) | |
2270 | { | |
2271 | return usb_create_shared_hcd(driver, dev, bus_name, NULL); | |
2272 | } | |
782e70c6 | 2273 | EXPORT_SYMBOL_GPL(usb_create_hcd); |
1da177e4 | 2274 | |
c5635437 SS |
2275 | /* |
2276 | * Roothubs that share one PCI device must also share the bandwidth mutex. | |
2277 | * Don't deallocate the bandwidth_mutex until the last shared usb_hcd is | |
2278 | * deallocated. | |
2279 | * | |
2280 | * Make sure to only deallocate the bandwidth_mutex when the primary HCD is | |
2281 | * freed. When hcd_release() is called for the non-primary HCD, set the | |
2282 | * primary_hcd's shared_hcd pointer to null (since the non-primary HCD will be | |
2283 | * freed shortly). | |
2284 | */ | |
17200583 AS |
2285 | static void hcd_release (struct kref *kref) |
2286 | { | |
2287 | struct usb_hcd *hcd = container_of (kref, struct usb_hcd, kref); | |
2288 | ||
c5635437 SS |
2289 | if (usb_hcd_is_primary_hcd(hcd)) |
2290 | kfree(hcd->bandwidth_mutex); | |
2291 | else | |
2292 | hcd->shared_hcd->shared_hcd = NULL; | |
17200583 AS |
2293 | kfree(hcd); |
2294 | } | |
2295 | ||
2296 | struct usb_hcd *usb_get_hcd (struct usb_hcd *hcd) | |
2297 | { | |
2298 | if (hcd) | |
2299 | kref_get (&hcd->kref); | |
2300 | return hcd; | |
2301 | } | |
782e70c6 | 2302 | EXPORT_SYMBOL_GPL(usb_get_hcd); |
17200583 | 2303 | |
1da177e4 LT |
2304 | void usb_put_hcd (struct usb_hcd *hcd) |
2305 | { | |
17200583 AS |
2306 | if (hcd) |
2307 | kref_put (&hcd->kref, hcd_release); | |
1da177e4 | 2308 | } |
782e70c6 | 2309 | EXPORT_SYMBOL_GPL(usb_put_hcd); |
1da177e4 | 2310 | |
c5635437 SS |
2311 | int usb_hcd_is_primary_hcd(struct usb_hcd *hcd) |
2312 | { | |
2313 | if (!hcd->primary_hcd) | |
2314 | return 1; | |
2315 | return hcd == hcd->primary_hcd; | |
2316 | } | |
2317 | EXPORT_SYMBOL_GPL(usb_hcd_is_primary_hcd); | |
2318 | ||
23e0d106 SS |
2319 | static int usb_hcd_request_irqs(struct usb_hcd *hcd, |
2320 | unsigned int irqnum, unsigned long irqflags) | |
2321 | { | |
2322 | int retval; | |
2323 | ||
2324 | if (hcd->driver->irq) { | |
2325 | ||
2326 | /* IRQF_DISABLED doesn't work as advertised when used together | |
2327 | * with IRQF_SHARED. As usb_hcd_irq() will always disable | |
2328 | * interrupts we can remove it here. | |
2329 | */ | |
2330 | if (irqflags & IRQF_SHARED) | |
2331 | irqflags &= ~IRQF_DISABLED; | |
2332 | ||
2333 | snprintf(hcd->irq_descr, sizeof(hcd->irq_descr), "%s:usb%d", | |
2334 | hcd->driver->description, hcd->self.busnum); | |
2335 | retval = request_irq(irqnum, &usb_hcd_irq, irqflags, | |
2336 | hcd->irq_descr, hcd); | |
2337 | if (retval != 0) { | |
2338 | dev_err(hcd->self.controller, | |
2339 | "request interrupt %d failed\n", | |
2340 | irqnum); | |
2341 | return retval; | |
2342 | } | |
2343 | hcd->irq = irqnum; | |
2344 | dev_info(hcd->self.controller, "irq %d, %s 0x%08llx\n", irqnum, | |
2345 | (hcd->driver->flags & HCD_MEMORY) ? | |
2346 | "io mem" : "io base", | |
2347 | (unsigned long long)hcd->rsrc_start); | |
2348 | } else { | |
2349 | hcd->irq = -1; | |
2350 | if (hcd->rsrc_start) | |
2351 | dev_info(hcd->self.controller, "%s 0x%08llx\n", | |
2352 | (hcd->driver->flags & HCD_MEMORY) ? | |
2353 | "io mem" : "io base", | |
2354 | (unsigned long long)hcd->rsrc_start); | |
2355 | } | |
2356 | return 0; | |
2357 | } | |
2358 | ||
1da177e4 LT |
2359 | /** |
2360 | * usb_add_hcd - finish generic HCD structure initialization and register | |
2361 | * @hcd: the usb_hcd structure to initialize | |
2362 | * @irqnum: Interrupt line to allocate | |
2363 | * @irqflags: Interrupt type flags | |
2364 | * | |
2365 | * Finish the remaining parts of generic HCD initialization: allocate the | |
2366 | * buffers of consistent memory, register the bus, request the IRQ line, | |
2367 | * and call the driver's reset() and start() routines. | |
2368 | */ | |
2369 | int usb_add_hcd(struct usb_hcd *hcd, | |
2370 | unsigned int irqnum, unsigned long irqflags) | |
2371 | { | |
8ec8d20b AS |
2372 | int retval; |
2373 | struct usb_device *rhdev; | |
1da177e4 LT |
2374 | |
2375 | dev_info(hcd->self.controller, "%s\n", hcd->product_desc); | |
2376 | ||
5234ce1b | 2377 | hcd->authorized_default = hcd->wireless? 0 : 1; |
8de98402 BH |
2378 | set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); |
2379 | ||
b1e8f0a6 DB |
2380 | /* HC is in reset state, but accessible. Now do the one-time init, |
2381 | * bottom up so that hcds can customize the root hubs before khubd | |
2382 | * starts talking to them. (Note, bus id is assigned early too.) | |
2383 | */ | |
1da177e4 LT |
2384 | if ((retval = hcd_buffer_create(hcd)) != 0) { |
2385 | dev_dbg(hcd->self.controller, "pool alloc failed\n"); | |
2386 | return retval; | |
2387 | } | |
2388 | ||
2389 | if ((retval = usb_register_bus(&hcd->self)) < 0) | |
8ec8d20b | 2390 | goto err_register_bus; |
1da177e4 | 2391 | |
b1e8f0a6 DB |
2392 | if ((rhdev = usb_alloc_dev(NULL, &hcd->self, 0)) == NULL) { |
2393 | dev_err(hcd->self.controller, "unable to allocate root hub\n"); | |
2394 | retval = -ENOMEM; | |
2395 | goto err_allocate_root_hub; | |
2396 | } | |
6d88e679 | 2397 | hcd->self.root_hub = rhdev; |
6b403b02 | 2398 | |
83de4b2b | 2399 | switch (hcd->speed) { |
6b403b02 SS |
2400 | case HCD_USB11: |
2401 | rhdev->speed = USB_SPEED_FULL; | |
2402 | break; | |
2403 | case HCD_USB2: | |
2404 | rhdev->speed = USB_SPEED_HIGH; | |
2405 | break; | |
2406 | case HCD_USB3: | |
2407 | rhdev->speed = USB_SPEED_SUPER; | |
2408 | break; | |
2409 | default: | |
96e077ae | 2410 | goto err_set_rh_speed; |
6b403b02 | 2411 | } |
b1e8f0a6 | 2412 | |
db4cefaa DB |
2413 | /* wakeup flag init defaults to "everything works" for root hubs, |
2414 | * but drivers can override it in reset() if needed, along with | |
2415 | * recording the overall controller's system wakeup capability. | |
2416 | */ | |
2417 | device_init_wakeup(&rhdev->dev, 1); | |
2418 | ||
9b37596a AS |
2419 | /* HCD_FLAG_RH_RUNNING doesn't matter until the root hub is |
2420 | * registered. But since the controller can die at any time, | |
2421 | * let's initialize the flag before touching the hardware. | |
2422 | */ | |
2423 | set_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); | |
2424 | ||
b1e8f0a6 DB |
2425 | /* "reset" is misnamed; its role is now one-time init. the controller |
2426 | * should already have been reset (and boot firmware kicked off etc). | |
2427 | */ | |
2428 | if (hcd->driver->reset && (retval = hcd->driver->reset(hcd)) < 0) { | |
2429 | dev_err(hcd->self.controller, "can't setup\n"); | |
2430 | goto err_hcd_driver_setup; | |
2431 | } | |
6d88e679 | 2432 | hcd->rh_pollable = 1; |
b1e8f0a6 | 2433 | |
fb669cc0 DB |
2434 | /* NOTE: root hub and controller capabilities may not be the same */ |
2435 | if (device_can_wakeup(hcd->self.controller) | |
2436 | && device_can_wakeup(&hcd->self.root_hub->dev)) | |
b1e8f0a6 | 2437 | dev_dbg(hcd->self.controller, "supports USB remote wakeup\n"); |
b1e8f0a6 DB |
2438 | |
2439 | /* enable irqs just before we start the controller */ | |
c5635437 SS |
2440 | if (usb_hcd_is_primary_hcd(hcd)) { |
2441 | retval = usb_hcd_request_irqs(hcd, irqnum, irqflags); | |
2442 | if (retval) | |
2443 | goto err_request_irq; | |
2444 | } | |
1da177e4 | 2445 | |
4814030c | 2446 | hcd->state = HC_STATE_RUNNING; |
abc4f9b0 SS |
2447 | retval = hcd->driver->start(hcd); |
2448 | if (retval < 0) { | |
1da177e4 | 2449 | dev_err(hcd->self.controller, "startup error %d\n", retval); |
8ec8d20b | 2450 | goto err_hcd_driver_start; |
1da177e4 LT |
2451 | } |
2452 | ||
b1e8f0a6 | 2453 | /* starting here, usbcore will pay attention to this root hub */ |
55c52718 | 2454 | rhdev->bus_mA = min(500u, hcd->power_budget); |
b1e8f0a6 | 2455 | if ((retval = register_root_hub(hcd)) != 0) |
8ec8d20b AS |
2456 | goto err_register_root_hub; |
2457 | ||
5234ce1b IPG |
2458 | retval = sysfs_create_group(&rhdev->dev.kobj, &usb_bus_attr_group); |
2459 | if (retval < 0) { | |
2460 | printk(KERN_ERR "Cannot register USB bus sysfs attributes: %d\n", | |
2461 | retval); | |
2462 | goto error_create_attr_group; | |
2463 | } | |
541c7d43 | 2464 | if (hcd->uses_new_polling && HCD_POLL_RH(hcd)) |
d5926ae7 | 2465 | usb_hcd_poll_rh_status(hcd); |
1da177e4 LT |
2466 | return retval; |
2467 | ||
5234ce1b | 2468 | error_create_attr_group: |
9b37596a | 2469 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
96e077ae AS |
2470 | if (HC_IS_RUNNING(hcd->state)) |
2471 | hcd->state = HC_STATE_QUIESCING; | |
2472 | spin_lock_irq(&hcd_root_hub_lock); | |
2473 | hcd->rh_registered = 0; | |
2474 | spin_unlock_irq(&hcd_root_hub_lock); | |
2475 | ||
2476 | #ifdef CONFIG_USB_SUSPEND | |
2477 | cancel_work_sync(&hcd->wakeup_work); | |
2478 | #endif | |
5234ce1b | 2479 | mutex_lock(&usb_bus_list_lock); |
6d88e679 | 2480 | usb_disconnect(&rhdev); /* Sets rhdev to NULL */ |
5234ce1b | 2481 | mutex_unlock(&usb_bus_list_lock); |
b1e8f0a6 | 2482 | err_register_root_hub: |
6d88e679 | 2483 | hcd->rh_pollable = 0; |
541c7d43 | 2484 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
6d88e679 | 2485 | del_timer_sync(&hcd->rh_timer); |
8ec8d20b | 2486 | hcd->driver->stop(hcd); |
96e077ae | 2487 | hcd->state = HC_STATE_HALT; |
541c7d43 | 2488 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
96e077ae | 2489 | del_timer_sync(&hcd->rh_timer); |
b1e8f0a6 | 2490 | err_hcd_driver_start: |
c5635437 | 2491 | if (usb_hcd_is_primary_hcd(hcd) && hcd->irq >= 0) |
1da177e4 | 2492 | free_irq(irqnum, hcd); |
b1e8f0a6 DB |
2493 | err_request_irq: |
2494 | err_hcd_driver_setup: | |
96e077ae | 2495 | err_set_rh_speed: |
6d88e679 | 2496 | usb_put_dev(hcd->self.root_hub); |
b1e8f0a6 | 2497 | err_allocate_root_hub: |
1da177e4 | 2498 | usb_deregister_bus(&hcd->self); |
b1e8f0a6 | 2499 | err_register_bus: |
1da177e4 LT |
2500 | hcd_buffer_destroy(hcd); |
2501 | return retval; | |
2502 | } | |
782e70c6 | 2503 | EXPORT_SYMBOL_GPL(usb_add_hcd); |
1da177e4 LT |
2504 | |
2505 | /** | |
2506 | * usb_remove_hcd - shutdown processing for generic HCDs | |
2507 | * @hcd: the usb_hcd structure to remove | |
2508 | * Context: !in_interrupt() | |
2509 | * | |
2510 | * Disconnects the root hub, then reverses the effects of usb_add_hcd(), | |
2511 | * invoking the HCD's stop() method. | |
2512 | */ | |
2513 | void usb_remove_hcd(struct usb_hcd *hcd) | |
2514 | { | |
6d88e679 AS |
2515 | struct usb_device *rhdev = hcd->self.root_hub; |
2516 | ||
1da177e4 LT |
2517 | dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); |
2518 | ||
6d88e679 AS |
2519 | usb_get_dev(rhdev); |
2520 | sysfs_remove_group(&rhdev->dev.kobj, &usb_bus_attr_group); | |
96e077ae | 2521 | |
9b37596a | 2522 | clear_bit(HCD_FLAG_RH_RUNNING, &hcd->flags); |
1da177e4 LT |
2523 | if (HC_IS_RUNNING (hcd->state)) |
2524 | hcd->state = HC_STATE_QUIESCING; | |
2525 | ||
2526 | dev_dbg(hcd->self.controller, "roothub graceful disconnect\n"); | |
2527 | spin_lock_irq (&hcd_root_hub_lock); | |
2528 | hcd->rh_registered = 0; | |
2529 | spin_unlock_irq (&hcd_root_hub_lock); | |
9ad3d6cc | 2530 | |
9bbdf1e0 | 2531 | #ifdef CONFIG_USB_SUSPEND |
d5d4db70 | 2532 | cancel_work_sync(&hcd->wakeup_work); |
6b157c9b AS |
2533 | #endif |
2534 | ||
4186ecf8 | 2535 | mutex_lock(&usb_bus_list_lock); |
6d88e679 | 2536 | usb_disconnect(&rhdev); /* Sets rhdev to NULL */ |
4186ecf8 | 2537 | mutex_unlock(&usb_bus_list_lock); |
1da177e4 | 2538 | |
6d88e679 AS |
2539 | /* Prevent any more root-hub status calls from the timer. |
2540 | * The HCD might still restart the timer (if a port status change | |
2541 | * interrupt occurs), but usb_hcd_poll_rh_status() won't invoke | |
2542 | * the hub_status_data() callback. | |
2543 | */ | |
2544 | hcd->rh_pollable = 0; | |
541c7d43 | 2545 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
6d88e679 AS |
2546 | del_timer_sync(&hcd->rh_timer); |
2547 | ||
1da177e4 LT |
2548 | hcd->driver->stop(hcd); |
2549 | hcd->state = HC_STATE_HALT; | |
2550 | ||
6d88e679 | 2551 | /* In case the HCD restarted the timer, stop it again. */ |
541c7d43 | 2552 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
1b42ae6d AS |
2553 | del_timer_sync(&hcd->rh_timer); |
2554 | ||
c5635437 SS |
2555 | if (usb_hcd_is_primary_hcd(hcd)) { |
2556 | if (hcd->irq >= 0) | |
2557 | free_irq(hcd->irq, hcd); | |
2558 | } | |
6d88e679 AS |
2559 | |
2560 | usb_put_dev(hcd->self.root_hub); | |
1da177e4 LT |
2561 | usb_deregister_bus(&hcd->self); |
2562 | hcd_buffer_destroy(hcd); | |
2563 | } | |
782e70c6 | 2564 | EXPORT_SYMBOL_GPL(usb_remove_hcd); |
1da177e4 | 2565 | |
64a21d02 AG |
2566 | void |
2567 | usb_hcd_platform_shutdown(struct platform_device* dev) | |
2568 | { | |
2569 | struct usb_hcd *hcd = platform_get_drvdata(dev); | |
2570 | ||
2571 | if (hcd->driver->shutdown) | |
2572 | hcd->driver->shutdown(hcd); | |
2573 | } | |
782e70c6 | 2574 | EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown); |
64a21d02 | 2575 | |
1da177e4 LT |
2576 | /*-------------------------------------------------------------------------*/ |
2577 | ||
f150fa1a | 2578 | #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) |
1da177e4 LT |
2579 | |
2580 | struct usb_mon_operations *mon_ops; | |
2581 | ||
2582 | /* | |
2583 | * The registration is unlocked. | |
2584 | * We do it this way because we do not want to lock in hot paths. | |
2585 | * | |
2586 | * Notice that the code is minimally error-proof. Because usbmon needs | |
2587 | * symbols from usbcore, usbcore gets referenced and cannot be unloaded first. | |
2588 | */ | |
2589 | ||
2590 | int usb_mon_register (struct usb_mon_operations *ops) | |
2591 | { | |
2592 | ||
2593 | if (mon_ops) | |
2594 | return -EBUSY; | |
2595 | ||
2596 | mon_ops = ops; | |
2597 | mb(); | |
2598 | return 0; | |
2599 | } | |
2600 | EXPORT_SYMBOL_GPL (usb_mon_register); | |
2601 | ||
2602 | void usb_mon_deregister (void) | |
2603 | { | |
2604 | ||
2605 | if (mon_ops == NULL) { | |
2606 | printk(KERN_ERR "USB: monitor was not registered\n"); | |
2607 | return; | |
2608 | } | |
2609 | mon_ops = NULL; | |
2610 | mb(); | |
2611 | } | |
2612 | EXPORT_SYMBOL_GPL (usb_mon_deregister); | |
2613 | ||
f150fa1a | 2614 | #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ |