]>
Commit | Line | Data |
---|---|---|
aa69a809 | 1 | /* |
eb70e5ab | 2 | * udc.c - ChipIdea UDC driver |
aa69a809 DL |
3 | * |
4 | * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. | |
5 | * | |
6 | * Author: David Lopo | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
36825a2d | 13 | #include <linux/delay.h> |
aa69a809 DL |
14 | #include <linux/device.h> |
15 | #include <linux/dmapool.h> | |
ded017ee | 16 | #include <linux/err.h> |
5b08319f | 17 | #include <linux/irqreturn.h> |
aa69a809 | 18 | #include <linux/kernel.h> |
5a0e3ad6 | 19 | #include <linux/slab.h> |
c036019e | 20 | #include <linux/pm_runtime.h> |
aa69a809 DL |
21 | #include <linux/usb/ch9.h> |
22 | #include <linux/usb/gadget.h> | |
f01ef574 | 23 | #include <linux/usb/otg.h> |
e443b333 | 24 | #include <linux/usb/chipidea.h> |
aa69a809 | 25 | |
e443b333 AS |
26 | #include "ci.h" |
27 | #include "udc.h" | |
28 | #include "bits.h" | |
29 | #include "debug.h" | |
954aad8c | 30 | |
aa69a809 DL |
31 | /* control endpoint description */ |
32 | static const struct usb_endpoint_descriptor | |
ca9cfea0 | 33 | ctrl_endpt_out_desc = { |
aa69a809 DL |
34 | .bLength = USB_DT_ENDPOINT_SIZE, |
35 | .bDescriptorType = USB_DT_ENDPOINT, | |
36 | ||
ca9cfea0 PK |
37 | .bEndpointAddress = USB_DIR_OUT, |
38 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, | |
39 | .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX), | |
40 | }; | |
41 | ||
42 | static const struct usb_endpoint_descriptor | |
43 | ctrl_endpt_in_desc = { | |
44 | .bLength = USB_DT_ENDPOINT_SIZE, | |
45 | .bDescriptorType = USB_DT_ENDPOINT, | |
46 | ||
47 | .bEndpointAddress = USB_DIR_IN, | |
aa69a809 DL |
48 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, |
49 | .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX), | |
50 | }; | |
51 | ||
aa69a809 DL |
52 | /** |
53 | * hw_ep_bit: calculates the bit number | |
54 | * @num: endpoint number | |
55 | * @dir: endpoint direction | |
56 | * | |
57 | * This function returns bit number | |
58 | */ | |
59 | static inline int hw_ep_bit(int num, int dir) | |
60 | { | |
61 | return num + (dir ? 16 : 0); | |
62 | } | |
63 | ||
26c696c6 | 64 | static inline int ep_to_bit(struct ci13xxx *ci, int n) |
dd39c358 | 65 | { |
26c696c6 | 66 | int fill = 16 - ci->hw_ep_max / 2; |
dd39c358 | 67 | |
26c696c6 | 68 | if (n >= ci->hw_ep_max / 2) |
dd39c358 MKB |
69 | n += fill; |
70 | ||
71 | return n; | |
72 | } | |
73 | ||
aa69a809 | 74 | /** |
c0a48e6c | 75 | * hw_device_state: enables/disables interrupts (execute without interruption) |
aa69a809 DL |
76 | * @dma: 0 => disable, !0 => enable and set dma engine |
77 | * | |
78 | * This function returns an error code | |
79 | */ | |
26c696c6 | 80 | static int hw_device_state(struct ci13xxx *ci, u32 dma) |
aa69a809 DL |
81 | { |
82 | if (dma) { | |
26c696c6 | 83 | hw_write(ci, OP_ENDPTLISTADDR, ~0, dma); |
aa69a809 | 84 | /* interrupt, error, port change, reset, sleep/suspend */ |
26c696c6 | 85 | hw_write(ci, OP_USBINTR, ~0, |
aa69a809 | 86 | USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI); |
aa69a809 | 87 | } else { |
26c696c6 | 88 | hw_write(ci, OP_USBINTR, ~0, 0); |
aa69a809 DL |
89 | } |
90 | return 0; | |
91 | } | |
92 | ||
93 | /** | |
94 | * hw_ep_flush: flush endpoint fifo (execute without interruption) | |
95 | * @num: endpoint number | |
96 | * @dir: endpoint direction | |
97 | * | |
98 | * This function returns an error code | |
99 | */ | |
26c696c6 | 100 | static int hw_ep_flush(struct ci13xxx *ci, int num, int dir) |
aa69a809 DL |
101 | { |
102 | int n = hw_ep_bit(num, dir); | |
103 | ||
104 | do { | |
105 | /* flush any pending transfer */ | |
26c696c6 RZ |
106 | hw_write(ci, OP_ENDPTFLUSH, BIT(n), BIT(n)); |
107 | while (hw_read(ci, OP_ENDPTFLUSH, BIT(n))) | |
aa69a809 | 108 | cpu_relax(); |
26c696c6 | 109 | } while (hw_read(ci, OP_ENDPTSTAT, BIT(n))); |
aa69a809 DL |
110 | |
111 | return 0; | |
112 | } | |
113 | ||
114 | /** | |
115 | * hw_ep_disable: disables endpoint (execute without interruption) | |
116 | * @num: endpoint number | |
117 | * @dir: endpoint direction | |
118 | * | |
119 | * This function returns an error code | |
120 | */ | |
26c696c6 | 121 | static int hw_ep_disable(struct ci13xxx *ci, int num, int dir) |
aa69a809 | 122 | { |
26c696c6 RZ |
123 | hw_ep_flush(ci, num, dir); |
124 | hw_write(ci, OP_ENDPTCTRL + num, | |
d3595d13 | 125 | dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0); |
aa69a809 DL |
126 | return 0; |
127 | } | |
128 | ||
129 | /** | |
130 | * hw_ep_enable: enables endpoint (execute without interruption) | |
131 | * @num: endpoint number | |
132 | * @dir: endpoint direction | |
133 | * @type: endpoint type | |
134 | * | |
135 | * This function returns an error code | |
136 | */ | |
26c696c6 | 137 | static int hw_ep_enable(struct ci13xxx *ci, int num, int dir, int type) |
aa69a809 DL |
138 | { |
139 | u32 mask, data; | |
140 | ||
141 | if (dir) { | |
142 | mask = ENDPTCTRL_TXT; /* type */ | |
143 | data = type << ffs_nr(mask); | |
144 | ||
145 | mask |= ENDPTCTRL_TXS; /* unstall */ | |
146 | mask |= ENDPTCTRL_TXR; /* reset data toggle */ | |
147 | data |= ENDPTCTRL_TXR; | |
148 | mask |= ENDPTCTRL_TXE; /* enable */ | |
149 | data |= ENDPTCTRL_TXE; | |
150 | } else { | |
151 | mask = ENDPTCTRL_RXT; /* type */ | |
152 | data = type << ffs_nr(mask); | |
153 | ||
154 | mask |= ENDPTCTRL_RXS; /* unstall */ | |
155 | mask |= ENDPTCTRL_RXR; /* reset data toggle */ | |
156 | data |= ENDPTCTRL_RXR; | |
157 | mask |= ENDPTCTRL_RXE; /* enable */ | |
158 | data |= ENDPTCTRL_RXE; | |
159 | } | |
26c696c6 | 160 | hw_write(ci, OP_ENDPTCTRL + num, mask, data); |
aa69a809 DL |
161 | return 0; |
162 | } | |
163 | ||
164 | /** | |
165 | * hw_ep_get_halt: return endpoint halt status | |
166 | * @num: endpoint number | |
167 | * @dir: endpoint direction | |
168 | * | |
169 | * This function returns 1 if endpoint halted | |
170 | */ | |
26c696c6 | 171 | static int hw_ep_get_halt(struct ci13xxx *ci, int num, int dir) |
aa69a809 DL |
172 | { |
173 | u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS; | |
174 | ||
26c696c6 | 175 | return hw_read(ci, OP_ENDPTCTRL + num, mask) ? 1 : 0; |
aa69a809 DL |
176 | } |
177 | ||
aa69a809 DL |
178 | /** |
179 | * hw_test_and_clear_setup_status: test & clear setup status (execute without | |
180 | * interruption) | |
dd39c358 | 181 | * @n: endpoint number |
aa69a809 DL |
182 | * |
183 | * This function returns setup status | |
184 | */ | |
26c696c6 | 185 | static int hw_test_and_clear_setup_status(struct ci13xxx *ci, int n) |
aa69a809 | 186 | { |
26c696c6 RZ |
187 | n = ep_to_bit(ci, n); |
188 | return hw_test_and_clear(ci, OP_ENDPTSETUPSTAT, BIT(n)); | |
aa69a809 DL |
189 | } |
190 | ||
191 | /** | |
192 | * hw_ep_prime: primes endpoint (execute without interruption) | |
193 | * @num: endpoint number | |
194 | * @dir: endpoint direction | |
195 | * @is_ctrl: true if control endpoint | |
196 | * | |
197 | * This function returns an error code | |
198 | */ | |
26c696c6 | 199 | static int hw_ep_prime(struct ci13xxx *ci, int num, int dir, int is_ctrl) |
aa69a809 DL |
200 | { |
201 | int n = hw_ep_bit(num, dir); | |
202 | ||
26c696c6 | 203 | if (is_ctrl && dir == RX && hw_read(ci, OP_ENDPTSETUPSTAT, BIT(num))) |
aa69a809 DL |
204 | return -EAGAIN; |
205 | ||
26c696c6 | 206 | hw_write(ci, OP_ENDPTPRIME, BIT(n), BIT(n)); |
aa69a809 | 207 | |
26c696c6 | 208 | while (hw_read(ci, OP_ENDPTPRIME, BIT(n))) |
aa69a809 | 209 | cpu_relax(); |
26c696c6 | 210 | if (is_ctrl && dir == RX && hw_read(ci, OP_ENDPTSETUPSTAT, BIT(num))) |
aa69a809 DL |
211 | return -EAGAIN; |
212 | ||
213 | /* status shoult be tested according with manual but it doesn't work */ | |
214 | return 0; | |
215 | } | |
216 | ||
217 | /** | |
218 | * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute | |
219 | * without interruption) | |
220 | * @num: endpoint number | |
221 | * @dir: endpoint direction | |
222 | * @value: true => stall, false => unstall | |
223 | * | |
224 | * This function returns an error code | |
225 | */ | |
26c696c6 | 226 | static int hw_ep_set_halt(struct ci13xxx *ci, int num, int dir, int value) |
aa69a809 DL |
227 | { |
228 | if (value != 0 && value != 1) | |
229 | return -EINVAL; | |
230 | ||
231 | do { | |
262c1632 | 232 | enum ci13xxx_regs reg = OP_ENDPTCTRL + num; |
aa69a809 DL |
233 | u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS; |
234 | u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR; | |
235 | ||
236 | /* data toggle - reserved for EP0 but it's in ESS */ | |
26c696c6 | 237 | hw_write(ci, reg, mask_xs|mask_xr, |
262c1632 | 238 | value ? mask_xs : mask_xr); |
26c696c6 | 239 | } while (value != hw_ep_get_halt(ci, num, dir)); |
aa69a809 DL |
240 | |
241 | return 0; | |
242 | } | |
243 | ||
aa69a809 DL |
244 | /** |
245 | * hw_is_port_high_speed: test if port is high speed | |
246 | * | |
247 | * This function returns true if high speed port | |
248 | */ | |
26c696c6 | 249 | static int hw_port_is_high_speed(struct ci13xxx *ci) |
aa69a809 | 250 | { |
26c696c6 RZ |
251 | return ci->hw_bank.lpm ? hw_read(ci, OP_DEVLC, DEVLC_PSPD) : |
252 | hw_read(ci, OP_PORTSC, PORTSC_HSP); | |
aa69a809 DL |
253 | } |
254 | ||
aa69a809 DL |
255 | /** |
256 | * hw_read_intr_enable: returns interrupt enable register | |
257 | * | |
258 | * This function returns register data | |
259 | */ | |
26c696c6 | 260 | static u32 hw_read_intr_enable(struct ci13xxx *ci) |
aa69a809 | 261 | { |
26c696c6 | 262 | return hw_read(ci, OP_USBINTR, ~0); |
aa69a809 DL |
263 | } |
264 | ||
265 | /** | |
266 | * hw_read_intr_status: returns interrupt status register | |
267 | * | |
268 | * This function returns register data | |
269 | */ | |
26c696c6 | 270 | static u32 hw_read_intr_status(struct ci13xxx *ci) |
aa69a809 | 271 | { |
26c696c6 | 272 | return hw_read(ci, OP_USBSTS, ~0); |
aa69a809 DL |
273 | } |
274 | ||
aa69a809 DL |
275 | /** |
276 | * hw_test_and_clear_complete: test & clear complete status (execute without | |
277 | * interruption) | |
dd39c358 | 278 | * @n: endpoint number |
aa69a809 DL |
279 | * |
280 | * This function returns complete status | |
281 | */ | |
26c696c6 | 282 | static int hw_test_and_clear_complete(struct ci13xxx *ci, int n) |
aa69a809 | 283 | { |
26c696c6 RZ |
284 | n = ep_to_bit(ci, n); |
285 | return hw_test_and_clear(ci, OP_ENDPTCOMPLETE, BIT(n)); | |
aa69a809 DL |
286 | } |
287 | ||
288 | /** | |
289 | * hw_test_and_clear_intr_active: test & clear active interrupts (execute | |
290 | * without interruption) | |
291 | * | |
292 | * This function returns active interrutps | |
293 | */ | |
26c696c6 | 294 | static u32 hw_test_and_clear_intr_active(struct ci13xxx *ci) |
aa69a809 | 295 | { |
26c696c6 | 296 | u32 reg = hw_read_intr_status(ci) & hw_read_intr_enable(ci); |
aa69a809 | 297 | |
26c696c6 | 298 | hw_write(ci, OP_USBSTS, ~0, reg); |
aa69a809 DL |
299 | return reg; |
300 | } | |
301 | ||
302 | /** | |
303 | * hw_test_and_clear_setup_guard: test & clear setup guard (execute without | |
304 | * interruption) | |
305 | * | |
306 | * This function returns guard value | |
307 | */ | |
26c696c6 | 308 | static int hw_test_and_clear_setup_guard(struct ci13xxx *ci) |
aa69a809 | 309 | { |
26c696c6 | 310 | return hw_test_and_write(ci, OP_USBCMD, USBCMD_SUTW, 0); |
aa69a809 DL |
311 | } |
312 | ||
313 | /** | |
314 | * hw_test_and_set_setup_guard: test & set setup guard (execute without | |
315 | * interruption) | |
316 | * | |
317 | * This function returns guard value | |
318 | */ | |
26c696c6 | 319 | static int hw_test_and_set_setup_guard(struct ci13xxx *ci) |
aa69a809 | 320 | { |
26c696c6 | 321 | return hw_test_and_write(ci, OP_USBCMD, USBCMD_SUTW, USBCMD_SUTW); |
aa69a809 DL |
322 | } |
323 | ||
324 | /** | |
325 | * hw_usb_set_address: configures USB address (execute without interruption) | |
326 | * @value: new USB address | |
327 | * | |
ef15e549 AS |
328 | * This function explicitly sets the address, without the "USBADRA" (advance) |
329 | * feature, which is not supported by older versions of the controller. | |
aa69a809 | 330 | */ |
26c696c6 | 331 | static void hw_usb_set_address(struct ci13xxx *ci, u8 value) |
aa69a809 | 332 | { |
26c696c6 | 333 | hw_write(ci, OP_DEVICEADDR, DEVICEADDR_USBADR, |
ef15e549 | 334 | value << ffs_nr(DEVICEADDR_USBADR)); |
aa69a809 DL |
335 | } |
336 | ||
337 | /** | |
338 | * hw_usb_reset: restart device after a bus reset (execute without | |
339 | * interruption) | |
340 | * | |
341 | * This function returns an error code | |
342 | */ | |
26c696c6 | 343 | static int hw_usb_reset(struct ci13xxx *ci) |
aa69a809 | 344 | { |
26c696c6 | 345 | hw_usb_set_address(ci, 0); |
aa69a809 DL |
346 | |
347 | /* ESS flushes only at end?!? */ | |
26c696c6 | 348 | hw_write(ci, OP_ENDPTFLUSH, ~0, ~0); |
aa69a809 DL |
349 | |
350 | /* clear setup token semaphores */ | |
26c696c6 | 351 | hw_write(ci, OP_ENDPTSETUPSTAT, 0, 0); |
aa69a809 DL |
352 | |
353 | /* clear complete status */ | |
26c696c6 | 354 | hw_write(ci, OP_ENDPTCOMPLETE, 0, 0); |
aa69a809 DL |
355 | |
356 | /* wait until all bits cleared */ | |
26c696c6 | 357 | while (hw_read(ci, OP_ENDPTPRIME, ~0)) |
aa69a809 DL |
358 | udelay(10); /* not RTOS friendly */ |
359 | ||
360 | /* reset all endpoints ? */ | |
361 | ||
362 | /* reset internal status and wait for further instructions | |
363 | no need to verify the port reset status (ESS does it) */ | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
aa69a809 DL |
368 | /****************************************************************************** |
369 | * UTIL block | |
370 | *****************************************************************************/ | |
371 | /** | |
372 | * _usb_addr: calculates endpoint address from direction & number | |
373 | * @ep: endpoint | |
374 | */ | |
375 | static inline u8 _usb_addr(struct ci13xxx_ep *ep) | |
376 | { | |
377 | return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num; | |
378 | } | |
379 | ||
380 | /** | |
381 | * _hardware_queue: configures a request at hardware level | |
382 | * @gadget: gadget | |
383 | * @mEp: endpoint | |
384 | * | |
385 | * This function returns an error code | |
386 | */ | |
387 | static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq) | |
388 | { | |
26c696c6 | 389 | struct ci13xxx *ci = mEp->ci; |
aa69a809 | 390 | unsigned i; |
0e6ca199 PK |
391 | int ret = 0; |
392 | unsigned length = mReq->req.length; | |
aa69a809 | 393 | |
aa69a809 DL |
394 | /* don't queue twice */ |
395 | if (mReq->req.status == -EALREADY) | |
396 | return -EALREADY; | |
397 | ||
aa69a809 | 398 | mReq->req.status = -EALREADY; |
aa69a809 | 399 | |
0e6ca199 PK |
400 | if (mReq->req.zero && length && (length % mEp->ep.maxpacket == 0)) { |
401 | mReq->zptr = dma_pool_alloc(mEp->td_pool, GFP_ATOMIC, | |
402 | &mReq->zdma); | |
5e0aa49e | 403 | if (mReq->zptr == NULL) |
0e6ca199 | 404 | return -ENOMEM; |
5e0aa49e | 405 | |
0e6ca199 PK |
406 | memset(mReq->zptr, 0, sizeof(*mReq->zptr)); |
407 | mReq->zptr->next = TD_TERMINATE; | |
408 | mReq->zptr->token = TD_STATUS_ACTIVE; | |
409 | if (!mReq->req.no_interrupt) | |
410 | mReq->zptr->token |= TD_IOC; | |
411 | } | |
26c696c6 | 412 | ret = usb_gadget_map_request(&ci->gadget, &mReq->req, mEp->dir); |
5e0aa49e AS |
413 | if (ret) |
414 | return ret; | |
415 | ||
aa69a809 DL |
416 | /* |
417 | * TD configuration | |
418 | * TODO - handle requests which spawns into several TDs | |
419 | */ | |
420 | memset(mReq->ptr, 0, sizeof(*mReq->ptr)); | |
0e6ca199 | 421 | mReq->ptr->token = length << ffs_nr(TD_TOTAL_BYTES); |
aa69a809 | 422 | mReq->ptr->token &= TD_TOTAL_BYTES; |
aa69a809 | 423 | mReq->ptr->token |= TD_STATUS_ACTIVE; |
0e6ca199 PK |
424 | if (mReq->zptr) { |
425 | mReq->ptr->next = mReq->zdma; | |
426 | } else { | |
427 | mReq->ptr->next = TD_TERMINATE; | |
428 | if (!mReq->req.no_interrupt) | |
429 | mReq->ptr->token |= TD_IOC; | |
430 | } | |
aa69a809 DL |
431 | mReq->ptr->page[0] = mReq->req.dma; |
432 | for (i = 1; i < 5; i++) | |
433 | mReq->ptr->page[i] = | |
0a313c4d | 434 | (mReq->req.dma + i * CI13XXX_PAGE_SIZE) & ~TD_RESERVED_MASK; |
aa69a809 | 435 | |
0e6ca199 PK |
436 | if (!list_empty(&mEp->qh.queue)) { |
437 | struct ci13xxx_req *mReqPrev; | |
438 | int n = hw_ep_bit(mEp->num, mEp->dir); | |
439 | int tmp_stat; | |
440 | ||
441 | mReqPrev = list_entry(mEp->qh.queue.prev, | |
442 | struct ci13xxx_req, queue); | |
443 | if (mReqPrev->zptr) | |
444 | mReqPrev->zptr->next = mReq->dma & TD_ADDR_MASK; | |
445 | else | |
446 | mReqPrev->ptr->next = mReq->dma & TD_ADDR_MASK; | |
447 | wmb(); | |
26c696c6 | 448 | if (hw_read(ci, OP_ENDPTPRIME, BIT(n))) |
0e6ca199 PK |
449 | goto done; |
450 | do { | |
26c696c6 RZ |
451 | hw_write(ci, OP_USBCMD, USBCMD_ATDTW, USBCMD_ATDTW); |
452 | tmp_stat = hw_read(ci, OP_ENDPTSTAT, BIT(n)); | |
453 | } while (!hw_read(ci, OP_USBCMD, USBCMD_ATDTW)); | |
454 | hw_write(ci, OP_USBCMD, USBCMD_ATDTW, 0); | |
0e6ca199 PK |
455 | if (tmp_stat) |
456 | goto done; | |
457 | } | |
458 | ||
459 | /* QH configuration */ | |
ca9cfea0 PK |
460 | mEp->qh.ptr->td.next = mReq->dma; /* TERMINATE = 0 */ |
461 | mEp->qh.ptr->td.token &= ~TD_STATUS; /* clear status */ | |
0e6ca199 | 462 | mEp->qh.ptr->cap |= QH_ZLT; |
aa69a809 DL |
463 | |
464 | wmb(); /* synchronize before ep prime */ | |
465 | ||
26c696c6 | 466 | ret = hw_ep_prime(ci, mEp->num, mEp->dir, |
aa69a809 | 467 | mEp->type == USB_ENDPOINT_XFER_CONTROL); |
0e6ca199 PK |
468 | done: |
469 | return ret; | |
aa69a809 DL |
470 | } |
471 | ||
472 | /** | |
473 | * _hardware_dequeue: handles a request at hardware level | |
474 | * @gadget: gadget | |
475 | * @mEp: endpoint | |
476 | * | |
477 | * This function returns an error code | |
478 | */ | |
479 | static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq) | |
480 | { | |
aa69a809 DL |
481 | if (mReq->req.status != -EALREADY) |
482 | return -EINVAL; | |
483 | ||
0e6ca199 PK |
484 | if ((TD_STATUS_ACTIVE & mReq->ptr->token) != 0) |
485 | return -EBUSY; | |
486 | ||
487 | if (mReq->zptr) { | |
488 | if ((TD_STATUS_ACTIVE & mReq->zptr->token) != 0) | |
489 | return -EBUSY; | |
490 | dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma); | |
491 | mReq->zptr = NULL; | |
492 | } | |
aa69a809 DL |
493 | |
494 | mReq->req.status = 0; | |
495 | ||
26c696c6 | 496 | usb_gadget_unmap_request(&mEp->ci->gadget, &mReq->req, mEp->dir); |
aa69a809 DL |
497 | |
498 | mReq->req.status = mReq->ptr->token & TD_STATUS; | |
0e6ca199 | 499 | if ((TD_STATUS_HALTED & mReq->req.status) != 0) |
aa69a809 DL |
500 | mReq->req.status = -1; |
501 | else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0) | |
502 | mReq->req.status = -1; | |
503 | else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0) | |
504 | mReq->req.status = -1; | |
505 | ||
506 | mReq->req.actual = mReq->ptr->token & TD_TOTAL_BYTES; | |
507 | mReq->req.actual >>= ffs_nr(TD_TOTAL_BYTES); | |
508 | mReq->req.actual = mReq->req.length - mReq->req.actual; | |
509 | mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual; | |
510 | ||
511 | return mReq->req.actual; | |
512 | } | |
513 | ||
514 | /** | |
515 | * _ep_nuke: dequeues all endpoint requests | |
516 | * @mEp: endpoint | |
517 | * | |
518 | * This function returns an error code | |
519 | * Caller must hold lock | |
520 | */ | |
521 | static int _ep_nuke(struct ci13xxx_ep *mEp) | |
522 | __releases(mEp->lock) | |
523 | __acquires(mEp->lock) | |
524 | { | |
aa69a809 DL |
525 | if (mEp == NULL) |
526 | return -EINVAL; | |
527 | ||
26c696c6 | 528 | hw_ep_flush(mEp->ci, mEp->num, mEp->dir); |
aa69a809 | 529 | |
ca9cfea0 | 530 | while (!list_empty(&mEp->qh.queue)) { |
aa69a809 DL |
531 | |
532 | /* pop oldest request */ | |
533 | struct ci13xxx_req *mReq = \ | |
ca9cfea0 | 534 | list_entry(mEp->qh.queue.next, |
aa69a809 DL |
535 | struct ci13xxx_req, queue); |
536 | list_del_init(&mReq->queue); | |
537 | mReq->req.status = -ESHUTDOWN; | |
538 | ||
7c25a826 | 539 | if (mReq->req.complete != NULL) { |
aa69a809 DL |
540 | spin_unlock(mEp->lock); |
541 | mReq->req.complete(&mEp->ep, &mReq->req); | |
542 | spin_lock(mEp->lock); | |
543 | } | |
544 | } | |
545 | return 0; | |
546 | } | |
547 | ||
548 | /** | |
549 | * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts | |
550 | * @gadget: gadget | |
551 | * | |
552 | * This function returns an error code | |
aa69a809 DL |
553 | */ |
554 | static int _gadget_stop_activity(struct usb_gadget *gadget) | |
aa69a809 DL |
555 | { |
556 | struct usb_ep *ep; | |
26c696c6 | 557 | struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget); |
e2b61c1d | 558 | unsigned long flags; |
aa69a809 | 559 | |
26c696c6 RZ |
560 | spin_lock_irqsave(&ci->lock, flags); |
561 | ci->gadget.speed = USB_SPEED_UNKNOWN; | |
562 | ci->remote_wakeup = 0; | |
563 | ci->suspended = 0; | |
564 | spin_unlock_irqrestore(&ci->lock, flags); | |
e2b61c1d | 565 | |
aa69a809 DL |
566 | /* flush all endpoints */ |
567 | gadget_for_each_ep(ep, gadget) { | |
568 | usb_ep_fifo_flush(ep); | |
569 | } | |
26c696c6 RZ |
570 | usb_ep_fifo_flush(&ci->ep0out->ep); |
571 | usb_ep_fifo_flush(&ci->ep0in->ep); | |
aa69a809 | 572 | |
26c696c6 RZ |
573 | if (ci->driver) |
574 | ci->driver->disconnect(gadget); | |
aa69a809 DL |
575 | |
576 | /* make sure to disable all endpoints */ | |
577 | gadget_for_each_ep(ep, gadget) { | |
578 | usb_ep_disable(ep); | |
579 | } | |
aa69a809 | 580 | |
26c696c6 RZ |
581 | if (ci->status != NULL) { |
582 | usb_ep_free_request(&ci->ep0in->ep, ci->status); | |
583 | ci->status = NULL; | |
aa69a809 DL |
584 | } |
585 | ||
aa69a809 DL |
586 | return 0; |
587 | } | |
588 | ||
589 | /****************************************************************************** | |
590 | * ISR block | |
591 | *****************************************************************************/ | |
592 | /** | |
593 | * isr_reset_handler: USB reset interrupt handler | |
26c696c6 | 594 | * @ci: UDC device |
aa69a809 DL |
595 | * |
596 | * This function resets USB engine after a bus reset occurred | |
597 | */ | |
26c696c6 RZ |
598 | static void isr_reset_handler(struct ci13xxx *ci) |
599 | __releases(ci->lock) | |
600 | __acquires(ci->lock) | |
aa69a809 | 601 | { |
aa69a809 DL |
602 | int retval; |
603 | ||
26c696c6 RZ |
604 | spin_unlock(&ci->lock); |
605 | retval = _gadget_stop_activity(&ci->gadget); | |
aa69a809 DL |
606 | if (retval) |
607 | goto done; | |
608 | ||
26c696c6 | 609 | retval = hw_usb_reset(ci); |
aa69a809 DL |
610 | if (retval) |
611 | goto done; | |
612 | ||
26c696c6 RZ |
613 | ci->status = usb_ep_alloc_request(&ci->ep0in->ep, GFP_ATOMIC); |
614 | if (ci->status == NULL) | |
ac1aa6a2 | 615 | retval = -ENOMEM; |
ca9cfea0 | 616 | |
b9322252 | 617 | done: |
26c696c6 | 618 | spin_lock(&ci->lock); |
aa69a809 | 619 | |
aa69a809 | 620 | if (retval) |
26c696c6 | 621 | dev_err(ci->dev, "error: %i\n", retval); |
aa69a809 DL |
622 | } |
623 | ||
624 | /** | |
625 | * isr_get_status_complete: get_status request complete function | |
626 | * @ep: endpoint | |
627 | * @req: request handled | |
628 | * | |
629 | * Caller must release lock | |
630 | */ | |
631 | static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req) | |
632 | { | |
0f089094 | 633 | if (ep == NULL || req == NULL) |
aa69a809 | 634 | return; |
aa69a809 DL |
635 | |
636 | kfree(req->buf); | |
637 | usb_ep_free_request(ep, req); | |
638 | } | |
639 | ||
640 | /** | |
641 | * isr_get_status_response: get_status request response | |
26c696c6 | 642 | * @ci: ci struct |
aa69a809 DL |
643 | * @setup: setup request packet |
644 | * | |
645 | * This function returns an error code | |
646 | */ | |
26c696c6 | 647 | static int isr_get_status_response(struct ci13xxx *ci, |
aa69a809 DL |
648 | struct usb_ctrlrequest *setup) |
649 | __releases(mEp->lock) | |
650 | __acquires(mEp->lock) | |
651 | { | |
26c696c6 | 652 | struct ci13xxx_ep *mEp = ci->ep0in; |
aa69a809 DL |
653 | struct usb_request *req = NULL; |
654 | gfp_t gfp_flags = GFP_ATOMIC; | |
655 | int dir, num, retval; | |
656 | ||
aa69a809 DL |
657 | if (mEp == NULL || setup == NULL) |
658 | return -EINVAL; | |
659 | ||
660 | spin_unlock(mEp->lock); | |
661 | req = usb_ep_alloc_request(&mEp->ep, gfp_flags); | |
662 | spin_lock(mEp->lock); | |
663 | if (req == NULL) | |
664 | return -ENOMEM; | |
665 | ||
666 | req->complete = isr_get_status_complete; | |
667 | req->length = 2; | |
668 | req->buf = kzalloc(req->length, gfp_flags); | |
669 | if (req->buf == NULL) { | |
670 | retval = -ENOMEM; | |
671 | goto err_free_req; | |
672 | } | |
673 | ||
674 | if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) { | |
e2b61c1d | 675 | /* Assume that device is bus powered for now. */ |
26c696c6 | 676 | *(u16 *)req->buf = ci->remote_wakeup << 1; |
aa69a809 DL |
677 | retval = 0; |
678 | } else if ((setup->bRequestType & USB_RECIP_MASK) \ | |
679 | == USB_RECIP_ENDPOINT) { | |
680 | dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ? | |
681 | TX : RX; | |
682 | num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK; | |
26c696c6 | 683 | *(u16 *)req->buf = hw_ep_get_halt(ci, num, dir); |
aa69a809 DL |
684 | } |
685 | /* else do nothing; reserved for future use */ | |
686 | ||
687 | spin_unlock(mEp->lock); | |
688 | retval = usb_ep_queue(&mEp->ep, req, gfp_flags); | |
689 | spin_lock(mEp->lock); | |
690 | if (retval) | |
691 | goto err_free_buf; | |
692 | ||
693 | return 0; | |
694 | ||
695 | err_free_buf: | |
696 | kfree(req->buf); | |
697 | err_free_req: | |
698 | spin_unlock(mEp->lock); | |
699 | usb_ep_free_request(&mEp->ep, req); | |
700 | spin_lock(mEp->lock); | |
701 | return retval; | |
702 | } | |
703 | ||
541cace8 PK |
704 | /** |
705 | * isr_setup_status_complete: setup_status request complete function | |
706 | * @ep: endpoint | |
707 | * @req: request handled | |
708 | * | |
709 | * Caller must release lock. Put the port in test mode if test mode | |
710 | * feature is selected. | |
711 | */ | |
712 | static void | |
713 | isr_setup_status_complete(struct usb_ep *ep, struct usb_request *req) | |
714 | { | |
26c696c6 | 715 | struct ci13xxx *ci = req->context; |
541cace8 PK |
716 | unsigned long flags; |
717 | ||
26c696c6 RZ |
718 | if (ci->setaddr) { |
719 | hw_usb_set_address(ci, ci->address); | |
720 | ci->setaddr = false; | |
ef15e549 AS |
721 | } |
722 | ||
26c696c6 RZ |
723 | spin_lock_irqsave(&ci->lock, flags); |
724 | if (ci->test_mode) | |
725 | hw_port_test_set(ci, ci->test_mode); | |
726 | spin_unlock_irqrestore(&ci->lock, flags); | |
541cace8 PK |
727 | } |
728 | ||
aa69a809 DL |
729 | /** |
730 | * isr_setup_status_phase: queues the status phase of a setup transation | |
26c696c6 | 731 | * @ci: ci struct |
aa69a809 DL |
732 | * |
733 | * This function returns an error code | |
734 | */ | |
26c696c6 | 735 | static int isr_setup_status_phase(struct ci13xxx *ci) |
aa69a809 DL |
736 | __releases(mEp->lock) |
737 | __acquires(mEp->lock) | |
738 | { | |
739 | int retval; | |
ca9cfea0 | 740 | struct ci13xxx_ep *mEp; |
aa69a809 | 741 | |
26c696c6 RZ |
742 | mEp = (ci->ep0_dir == TX) ? ci->ep0out : ci->ep0in; |
743 | ci->status->context = ci; | |
744 | ci->status->complete = isr_setup_status_complete; | |
aa69a809 DL |
745 | |
746 | spin_unlock(mEp->lock); | |
26c696c6 | 747 | retval = usb_ep_queue(&mEp->ep, ci->status, GFP_ATOMIC); |
aa69a809 DL |
748 | spin_lock(mEp->lock); |
749 | ||
750 | return retval; | |
751 | } | |
752 | ||
753 | /** | |
754 | * isr_tr_complete_low: transaction complete low level handler | |
755 | * @mEp: endpoint | |
756 | * | |
757 | * This function returns an error code | |
758 | * Caller must hold lock | |
759 | */ | |
760 | static int isr_tr_complete_low(struct ci13xxx_ep *mEp) | |
761 | __releases(mEp->lock) | |
762 | __acquires(mEp->lock) | |
763 | { | |
0e6ca199 | 764 | struct ci13xxx_req *mReq, *mReqTemp; |
76cd9cfb | 765 | struct ci13xxx_ep *mEpTemp = mEp; |
db89960e | 766 | int retval = 0; |
aa69a809 | 767 | |
0e6ca199 PK |
768 | list_for_each_entry_safe(mReq, mReqTemp, &mEp->qh.queue, |
769 | queue) { | |
770 | retval = _hardware_dequeue(mEp, mReq); | |
771 | if (retval < 0) | |
772 | break; | |
773 | list_del_init(&mReq->queue); | |
0e6ca199 PK |
774 | if (mReq->req.complete != NULL) { |
775 | spin_unlock(mEp->lock); | |
76cd9cfb PK |
776 | if ((mEp->type == USB_ENDPOINT_XFER_CONTROL) && |
777 | mReq->req.length) | |
26c696c6 | 778 | mEpTemp = mEp->ci->ep0in; |
76cd9cfb | 779 | mReq->req.complete(&mEpTemp->ep, &mReq->req); |
0e6ca199 PK |
780 | spin_lock(mEp->lock); |
781 | } | |
d9bb9c18 AL |
782 | } |
783 | ||
ef907482 | 784 | if (retval == -EBUSY) |
0e6ca199 | 785 | retval = 0; |
aa69a809 | 786 | |
aa69a809 DL |
787 | return retval; |
788 | } | |
789 | ||
790 | /** | |
791 | * isr_tr_complete_handler: transaction complete interrupt handler | |
26c696c6 | 792 | * @ci: UDC descriptor |
aa69a809 DL |
793 | * |
794 | * This function handles traffic events | |
795 | */ | |
26c696c6 RZ |
796 | static void isr_tr_complete_handler(struct ci13xxx *ci) |
797 | __releases(ci->lock) | |
798 | __acquires(ci->lock) | |
aa69a809 DL |
799 | { |
800 | unsigned i; | |
541cace8 | 801 | u8 tmode = 0; |
aa69a809 | 802 | |
26c696c6 RZ |
803 | for (i = 0; i < ci->hw_ep_max; i++) { |
804 | struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i]; | |
4c5212b7 | 805 | int type, num, dir, err = -EINVAL; |
aa69a809 DL |
806 | struct usb_ctrlrequest req; |
807 | ||
31fb6014 | 808 | if (mEp->ep.desc == NULL) |
aa69a809 DL |
809 | continue; /* not configured */ |
810 | ||
26c696c6 | 811 | if (hw_test_and_clear_complete(ci, i)) { |
aa69a809 DL |
812 | err = isr_tr_complete_low(mEp); |
813 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) { | |
814 | if (err > 0) /* needs status phase */ | |
26c696c6 | 815 | err = isr_setup_status_phase(ci); |
aa69a809 | 816 | if (err < 0) { |
26c696c6 | 817 | spin_unlock(&ci->lock); |
aa69a809 | 818 | if (usb_ep_set_halt(&mEp->ep)) |
26c696c6 | 819 | dev_err(ci->dev, |
0917ba84 | 820 | "error: ep_set_halt\n"); |
26c696c6 | 821 | spin_lock(&ci->lock); |
aa69a809 DL |
822 | } |
823 | } | |
824 | } | |
825 | ||
826 | if (mEp->type != USB_ENDPOINT_XFER_CONTROL || | |
26c696c6 | 827 | !hw_test_and_clear_setup_status(ci, i)) |
aa69a809 DL |
828 | continue; |
829 | ||
830 | if (i != 0) { | |
26c696c6 | 831 | dev_warn(ci->dev, "ctrl traffic at endpoint %d\n", i); |
aa69a809 DL |
832 | continue; |
833 | } | |
834 | ||
ca9cfea0 PK |
835 | /* |
836 | * Flush data and handshake transactions of previous | |
837 | * setup packet. | |
838 | */ | |
26c696c6 RZ |
839 | _ep_nuke(ci->ep0out); |
840 | _ep_nuke(ci->ep0in); | |
ca9cfea0 | 841 | |
aa69a809 DL |
842 | /* read_setup_packet */ |
843 | do { | |
26c696c6 | 844 | hw_test_and_set_setup_guard(ci); |
ca9cfea0 | 845 | memcpy(&req, &mEp->qh.ptr->setup, sizeof(req)); |
26c696c6 | 846 | } while (!hw_test_and_clear_setup_guard(ci)); |
aa69a809 DL |
847 | |
848 | type = req.bRequestType; | |
849 | ||
26c696c6 | 850 | ci->ep0_dir = (type & USB_DIR_IN) ? TX : RX; |
aa69a809 | 851 | |
aa69a809 DL |
852 | switch (req.bRequest) { |
853 | case USB_REQ_CLEAR_FEATURE: | |
e2b61c1d PK |
854 | if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) && |
855 | le16_to_cpu(req.wValue) == | |
856 | USB_ENDPOINT_HALT) { | |
857 | if (req.wLength != 0) | |
858 | break; | |
859 | num = le16_to_cpu(req.wIndex); | |
4c5212b7 | 860 | dir = num & USB_ENDPOINT_DIR_MASK; |
e2b61c1d | 861 | num &= USB_ENDPOINT_NUMBER_MASK; |
4c5212b7 | 862 | if (dir) /* TX */ |
26c696c6 RZ |
863 | num += ci->hw_ep_max/2; |
864 | if (!ci->ci13xxx_ep[num].wedge) { | |
865 | spin_unlock(&ci->lock); | |
e2b61c1d | 866 | err = usb_ep_clear_halt( |
26c696c6 RZ |
867 | &ci->ci13xxx_ep[num].ep); |
868 | spin_lock(&ci->lock); | |
e2b61c1d PK |
869 | if (err) |
870 | break; | |
871 | } | |
26c696c6 | 872 | err = isr_setup_status_phase(ci); |
e2b61c1d PK |
873 | } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE) && |
874 | le16_to_cpu(req.wValue) == | |
875 | USB_DEVICE_REMOTE_WAKEUP) { | |
876 | if (req.wLength != 0) | |
aa69a809 | 877 | break; |
26c696c6 RZ |
878 | ci->remote_wakeup = 0; |
879 | err = isr_setup_status_phase(ci); | |
e2b61c1d PK |
880 | } else { |
881 | goto delegate; | |
aa69a809 | 882 | } |
aa69a809 DL |
883 | break; |
884 | case USB_REQ_GET_STATUS: | |
885 | if (type != (USB_DIR_IN|USB_RECIP_DEVICE) && | |
886 | type != (USB_DIR_IN|USB_RECIP_ENDPOINT) && | |
887 | type != (USB_DIR_IN|USB_RECIP_INTERFACE)) | |
888 | goto delegate; | |
889 | if (le16_to_cpu(req.wLength) != 2 || | |
890 | le16_to_cpu(req.wValue) != 0) | |
891 | break; | |
26c696c6 | 892 | err = isr_get_status_response(ci, &req); |
aa69a809 DL |
893 | break; |
894 | case USB_REQ_SET_ADDRESS: | |
895 | if (type != (USB_DIR_OUT|USB_RECIP_DEVICE)) | |
896 | goto delegate; | |
897 | if (le16_to_cpu(req.wLength) != 0 || | |
898 | le16_to_cpu(req.wIndex) != 0) | |
899 | break; | |
26c696c6 RZ |
900 | ci->address = (u8)le16_to_cpu(req.wValue); |
901 | ci->setaddr = true; | |
902 | err = isr_setup_status_phase(ci); | |
aa69a809 DL |
903 | break; |
904 | case USB_REQ_SET_FEATURE: | |
e2b61c1d PK |
905 | if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) && |
906 | le16_to_cpu(req.wValue) == | |
907 | USB_ENDPOINT_HALT) { | |
908 | if (req.wLength != 0) | |
909 | break; | |
910 | num = le16_to_cpu(req.wIndex); | |
4c5212b7 | 911 | dir = num & USB_ENDPOINT_DIR_MASK; |
e2b61c1d | 912 | num &= USB_ENDPOINT_NUMBER_MASK; |
4c5212b7 | 913 | if (dir) /* TX */ |
26c696c6 | 914 | num += ci->hw_ep_max/2; |
aa69a809 | 915 | |
26c696c6 RZ |
916 | spin_unlock(&ci->lock); |
917 | err = usb_ep_set_halt(&ci->ci13xxx_ep[num].ep); | |
918 | spin_lock(&ci->lock); | |
e2b61c1d | 919 | if (!err) |
26c696c6 | 920 | isr_setup_status_phase(ci); |
541cace8 | 921 | } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE)) { |
e2b61c1d PK |
922 | if (req.wLength != 0) |
923 | break; | |
541cace8 PK |
924 | switch (le16_to_cpu(req.wValue)) { |
925 | case USB_DEVICE_REMOTE_WAKEUP: | |
26c696c6 RZ |
926 | ci->remote_wakeup = 1; |
927 | err = isr_setup_status_phase(ci); | |
541cace8 PK |
928 | break; |
929 | case USB_DEVICE_TEST_MODE: | |
930 | tmode = le16_to_cpu(req.wIndex) >> 8; | |
931 | switch (tmode) { | |
932 | case TEST_J: | |
933 | case TEST_K: | |
934 | case TEST_SE0_NAK: | |
935 | case TEST_PACKET: | |
936 | case TEST_FORCE_EN: | |
26c696c6 | 937 | ci->test_mode = tmode; |
541cace8 | 938 | err = isr_setup_status_phase( |
26c696c6 | 939 | ci); |
541cace8 PK |
940 | break; |
941 | default: | |
942 | break; | |
943 | } | |
944 | default: | |
945 | goto delegate; | |
946 | } | |
e2b61c1d PK |
947 | } else { |
948 | goto delegate; | |
949 | } | |
aa69a809 DL |
950 | break; |
951 | default: | |
952 | delegate: | |
953 | if (req.wLength == 0) /* no data phase */ | |
26c696c6 | 954 | ci->ep0_dir = TX; |
aa69a809 | 955 | |
26c696c6 RZ |
956 | spin_unlock(&ci->lock); |
957 | err = ci->driver->setup(&ci->gadget, &req); | |
958 | spin_lock(&ci->lock); | |
aa69a809 DL |
959 | break; |
960 | } | |
961 | ||
962 | if (err < 0) { | |
26c696c6 | 963 | spin_unlock(&ci->lock); |
aa69a809 | 964 | if (usb_ep_set_halt(&mEp->ep)) |
26c696c6 RZ |
965 | dev_err(ci->dev, "error: ep_set_halt\n"); |
966 | spin_lock(&ci->lock); | |
aa69a809 DL |
967 | } |
968 | } | |
969 | } | |
970 | ||
971 | /****************************************************************************** | |
972 | * ENDPT block | |
973 | *****************************************************************************/ | |
974 | /** | |
975 | * ep_enable: configure endpoint, making it usable | |
976 | * | |
977 | * Check usb_ep_enable() at "usb_gadget.h" for details | |
978 | */ | |
979 | static int ep_enable(struct usb_ep *ep, | |
980 | const struct usb_endpoint_descriptor *desc) | |
981 | { | |
982 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
ca9cfea0 | 983 | int retval = 0; |
aa69a809 DL |
984 | unsigned long flags; |
985 | ||
aa69a809 DL |
986 | if (ep == NULL || desc == NULL) |
987 | return -EINVAL; | |
988 | ||
989 | spin_lock_irqsave(mEp->lock, flags); | |
990 | ||
991 | /* only internal SW should enable ctrl endpts */ | |
992 | ||
31fb6014 | 993 | mEp->ep.desc = desc; |
aa69a809 | 994 | |
ca9cfea0 | 995 | if (!list_empty(&mEp->qh.queue)) |
26c696c6 | 996 | dev_warn(mEp->ci->dev, "enabling a non-empty endpoint!\n"); |
aa69a809 | 997 | |
15739bb5 MK |
998 | mEp->dir = usb_endpoint_dir_in(desc) ? TX : RX; |
999 | mEp->num = usb_endpoint_num(desc); | |
1000 | mEp->type = usb_endpoint_type(desc); | |
aa69a809 | 1001 | |
29cc8897 | 1002 | mEp->ep.maxpacket = usb_endpoint_maxp(desc); |
aa69a809 | 1003 | |
ca9cfea0 | 1004 | mEp->qh.ptr->cap = 0; |
aa69a809 | 1005 | |
ca9cfea0 PK |
1006 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) |
1007 | mEp->qh.ptr->cap |= QH_IOS; | |
1008 | else if (mEp->type == USB_ENDPOINT_XFER_ISOC) | |
1009 | mEp->qh.ptr->cap &= ~QH_MULT; | |
1010 | else | |
1011 | mEp->qh.ptr->cap &= ~QH_ZLT; | |
aa69a809 | 1012 | |
ca9cfea0 PK |
1013 | mEp->qh.ptr->cap |= |
1014 | (mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT; | |
1015 | mEp->qh.ptr->td.next |= TD_TERMINATE; /* needed? */ | |
aa69a809 | 1016 | |
ac1aa6a2 A |
1017 | /* |
1018 | * Enable endpoints in the HW other than ep0 as ep0 | |
1019 | * is always enabled | |
1020 | */ | |
1021 | if (mEp->num) | |
26c696c6 | 1022 | retval |= hw_ep_enable(mEp->ci, mEp->num, mEp->dir, mEp->type); |
aa69a809 DL |
1023 | |
1024 | spin_unlock_irqrestore(mEp->lock, flags); | |
1025 | return retval; | |
1026 | } | |
1027 | ||
1028 | /** | |
1029 | * ep_disable: endpoint is no longer usable | |
1030 | * | |
1031 | * Check usb_ep_disable() at "usb_gadget.h" for details | |
1032 | */ | |
1033 | static int ep_disable(struct usb_ep *ep) | |
1034 | { | |
1035 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1036 | int direction, retval = 0; | |
1037 | unsigned long flags; | |
1038 | ||
aa69a809 DL |
1039 | if (ep == NULL) |
1040 | return -EINVAL; | |
31fb6014 | 1041 | else if (mEp->ep.desc == NULL) |
aa69a809 DL |
1042 | return -EBUSY; |
1043 | ||
1044 | spin_lock_irqsave(mEp->lock, flags); | |
1045 | ||
1046 | /* only internal SW should disable ctrl endpts */ | |
1047 | ||
1048 | direction = mEp->dir; | |
1049 | do { | |
aa69a809 | 1050 | retval |= _ep_nuke(mEp); |
26c696c6 | 1051 | retval |= hw_ep_disable(mEp->ci, mEp->num, mEp->dir); |
aa69a809 DL |
1052 | |
1053 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) | |
1054 | mEp->dir = (mEp->dir == TX) ? RX : TX; | |
1055 | ||
1056 | } while (mEp->dir != direction); | |
1057 | ||
f9c56cdd | 1058 | mEp->ep.desc = NULL; |
aa69a809 DL |
1059 | |
1060 | spin_unlock_irqrestore(mEp->lock, flags); | |
1061 | return retval; | |
1062 | } | |
1063 | ||
1064 | /** | |
1065 | * ep_alloc_request: allocate a request object to use with this endpoint | |
1066 | * | |
1067 | * Check usb_ep_alloc_request() at "usb_gadget.h" for details | |
1068 | */ | |
1069 | static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) | |
1070 | { | |
1071 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1072 | struct ci13xxx_req *mReq = NULL; | |
aa69a809 | 1073 | |
0f089094 | 1074 | if (ep == NULL) |
aa69a809 | 1075 | return NULL; |
aa69a809 | 1076 | |
aa69a809 DL |
1077 | mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags); |
1078 | if (mReq != NULL) { | |
1079 | INIT_LIST_HEAD(&mReq->queue); | |
1080 | ||
1081 | mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags, | |
1082 | &mReq->dma); | |
1083 | if (mReq->ptr == NULL) { | |
1084 | kfree(mReq); | |
1085 | mReq = NULL; | |
1086 | } | |
1087 | } | |
1088 | ||
aa69a809 DL |
1089 | return (mReq == NULL) ? NULL : &mReq->req; |
1090 | } | |
1091 | ||
1092 | /** | |
1093 | * ep_free_request: frees a request object | |
1094 | * | |
1095 | * Check usb_ep_free_request() at "usb_gadget.h" for details | |
1096 | */ | |
1097 | static void ep_free_request(struct usb_ep *ep, struct usb_request *req) | |
1098 | { | |
1099 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1100 | struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req); | |
1101 | unsigned long flags; | |
1102 | ||
aa69a809 | 1103 | if (ep == NULL || req == NULL) { |
aa69a809 DL |
1104 | return; |
1105 | } else if (!list_empty(&mReq->queue)) { | |
26c696c6 | 1106 | dev_err(mEp->ci->dev, "freeing queued request\n"); |
aa69a809 DL |
1107 | return; |
1108 | } | |
1109 | ||
1110 | spin_lock_irqsave(mEp->lock, flags); | |
1111 | ||
1112 | if (mReq->ptr) | |
1113 | dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma); | |
1114 | kfree(mReq); | |
1115 | ||
aa69a809 DL |
1116 | spin_unlock_irqrestore(mEp->lock, flags); |
1117 | } | |
1118 | ||
1119 | /** | |
1120 | * ep_queue: queues (submits) an I/O request to an endpoint | |
1121 | * | |
1122 | * Check usb_ep_queue()* at usb_gadget.h" for details | |
1123 | */ | |
1124 | static int ep_queue(struct usb_ep *ep, struct usb_request *req, | |
1125 | gfp_t __maybe_unused gfp_flags) | |
1126 | { | |
1127 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1128 | struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req); | |
26c696c6 | 1129 | struct ci13xxx *ci = mEp->ci; |
aa69a809 DL |
1130 | int retval = 0; |
1131 | unsigned long flags; | |
1132 | ||
31fb6014 | 1133 | if (ep == NULL || req == NULL || mEp->ep.desc == NULL) |
aa69a809 DL |
1134 | return -EINVAL; |
1135 | ||
1136 | spin_lock_irqsave(mEp->lock, flags); | |
1137 | ||
76cd9cfb PK |
1138 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) { |
1139 | if (req->length) | |
26c696c6 RZ |
1140 | mEp = (ci->ep0_dir == RX) ? |
1141 | ci->ep0out : ci->ep0in; | |
76cd9cfb PK |
1142 | if (!list_empty(&mEp->qh.queue)) { |
1143 | _ep_nuke(mEp); | |
1144 | retval = -EOVERFLOW; | |
26c696c6 | 1145 | dev_warn(mEp->ci->dev, "endpoint ctrl %X nuked\n", |
0f089094 | 1146 | _usb_addr(mEp)); |
76cd9cfb | 1147 | } |
aa69a809 DL |
1148 | } |
1149 | ||
1150 | /* first nuke then test link, e.g. previous status has not sent */ | |
1151 | if (!list_empty(&mReq->queue)) { | |
1152 | retval = -EBUSY; | |
26c696c6 | 1153 | dev_err(mEp->ci->dev, "request already in queue\n"); |
aa69a809 DL |
1154 | goto done; |
1155 | } | |
1156 | ||
1155a7b8 AS |
1157 | if (req->length > 4 * CI13XXX_PAGE_SIZE) { |
1158 | req->length = 4 * CI13XXX_PAGE_SIZE; | |
aa69a809 | 1159 | retval = -EMSGSIZE; |
26c696c6 | 1160 | dev_warn(mEp->ci->dev, "request length truncated\n"); |
aa69a809 DL |
1161 | } |
1162 | ||
aa69a809 DL |
1163 | /* push request */ |
1164 | mReq->req.status = -EINPROGRESS; | |
1165 | mReq->req.actual = 0; | |
aa69a809 | 1166 | |
0e6ca199 | 1167 | retval = _hardware_enqueue(mEp, mReq); |
d9bb9c18 | 1168 | |
69b7e8d3 | 1169 | if (retval == -EALREADY) |
aa69a809 | 1170 | retval = 0; |
0e6ca199 PK |
1171 | if (!retval) |
1172 | list_add_tail(&mReq->queue, &mEp->qh.queue); | |
aa69a809 DL |
1173 | |
1174 | done: | |
1175 | spin_unlock_irqrestore(mEp->lock, flags); | |
1176 | return retval; | |
1177 | } | |
1178 | ||
1179 | /** | |
1180 | * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint | |
1181 | * | |
1182 | * Check usb_ep_dequeue() at "usb_gadget.h" for details | |
1183 | */ | |
1184 | static int ep_dequeue(struct usb_ep *ep, struct usb_request *req) | |
1185 | { | |
1186 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1187 | struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req); | |
1188 | unsigned long flags; | |
1189 | ||
0e6ca199 | 1190 | if (ep == NULL || req == NULL || mReq->req.status != -EALREADY || |
31fb6014 | 1191 | mEp->ep.desc == NULL || list_empty(&mReq->queue) || |
0e6ca199 | 1192 | list_empty(&mEp->qh.queue)) |
aa69a809 DL |
1193 | return -EINVAL; |
1194 | ||
1195 | spin_lock_irqsave(mEp->lock, flags); | |
1196 | ||
26c696c6 | 1197 | hw_ep_flush(mEp->ci, mEp->num, mEp->dir); |
aa69a809 DL |
1198 | |
1199 | /* pop request */ | |
1200 | list_del_init(&mReq->queue); | |
5e0aa49e | 1201 | |
26c696c6 | 1202 | usb_gadget_unmap_request(&mEp->ci->gadget, req, mEp->dir); |
5e0aa49e | 1203 | |
aa69a809 DL |
1204 | req->status = -ECONNRESET; |
1205 | ||
7c25a826 | 1206 | if (mReq->req.complete != NULL) { |
aa69a809 DL |
1207 | spin_unlock(mEp->lock); |
1208 | mReq->req.complete(&mEp->ep, &mReq->req); | |
1209 | spin_lock(mEp->lock); | |
1210 | } | |
1211 | ||
1212 | spin_unlock_irqrestore(mEp->lock, flags); | |
1213 | return 0; | |
1214 | } | |
1215 | ||
1216 | /** | |
1217 | * ep_set_halt: sets the endpoint halt feature | |
1218 | * | |
1219 | * Check usb_ep_set_halt() at "usb_gadget.h" for details | |
1220 | */ | |
1221 | static int ep_set_halt(struct usb_ep *ep, int value) | |
1222 | { | |
1223 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1224 | int direction, retval = 0; | |
1225 | unsigned long flags; | |
1226 | ||
31fb6014 | 1227 | if (ep == NULL || mEp->ep.desc == NULL) |
aa69a809 DL |
1228 | return -EINVAL; |
1229 | ||
1230 | spin_lock_irqsave(mEp->lock, flags); | |
1231 | ||
1232 | #ifndef STALL_IN | |
1233 | /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */ | |
1234 | if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX && | |
ca9cfea0 | 1235 | !list_empty(&mEp->qh.queue)) { |
aa69a809 DL |
1236 | spin_unlock_irqrestore(mEp->lock, flags); |
1237 | return -EAGAIN; | |
1238 | } | |
1239 | #endif | |
1240 | ||
1241 | direction = mEp->dir; | |
1242 | do { | |
26c696c6 | 1243 | retval |= hw_ep_set_halt(mEp->ci, mEp->num, mEp->dir, value); |
aa69a809 DL |
1244 | |
1245 | if (!value) | |
1246 | mEp->wedge = 0; | |
1247 | ||
1248 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) | |
1249 | mEp->dir = (mEp->dir == TX) ? RX : TX; | |
1250 | ||
1251 | } while (mEp->dir != direction); | |
1252 | ||
1253 | spin_unlock_irqrestore(mEp->lock, flags); | |
1254 | return retval; | |
1255 | } | |
1256 | ||
1257 | /** | |
1258 | * ep_set_wedge: sets the halt feature and ignores clear requests | |
1259 | * | |
1260 | * Check usb_ep_set_wedge() at "usb_gadget.h" for details | |
1261 | */ | |
1262 | static int ep_set_wedge(struct usb_ep *ep) | |
1263 | { | |
1264 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1265 | unsigned long flags; | |
1266 | ||
31fb6014 | 1267 | if (ep == NULL || mEp->ep.desc == NULL) |
aa69a809 DL |
1268 | return -EINVAL; |
1269 | ||
1270 | spin_lock_irqsave(mEp->lock, flags); | |
aa69a809 | 1271 | mEp->wedge = 1; |
aa69a809 DL |
1272 | spin_unlock_irqrestore(mEp->lock, flags); |
1273 | ||
1274 | return usb_ep_set_halt(ep); | |
1275 | } | |
1276 | ||
1277 | /** | |
1278 | * ep_fifo_flush: flushes contents of a fifo | |
1279 | * | |
1280 | * Check usb_ep_fifo_flush() at "usb_gadget.h" for details | |
1281 | */ | |
1282 | static void ep_fifo_flush(struct usb_ep *ep) | |
1283 | { | |
1284 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1285 | unsigned long flags; | |
1286 | ||
aa69a809 | 1287 | if (ep == NULL) { |
26c696c6 | 1288 | dev_err(mEp->ci->dev, "%02X: -EINVAL\n", _usb_addr(mEp)); |
aa69a809 DL |
1289 | return; |
1290 | } | |
1291 | ||
1292 | spin_lock_irqsave(mEp->lock, flags); | |
1293 | ||
26c696c6 | 1294 | hw_ep_flush(mEp->ci, mEp->num, mEp->dir); |
aa69a809 DL |
1295 | |
1296 | spin_unlock_irqrestore(mEp->lock, flags); | |
1297 | } | |
1298 | ||
1299 | /** | |
1300 | * Endpoint-specific part of the API to the USB controller hardware | |
1301 | * Check "usb_gadget.h" for details | |
1302 | */ | |
1303 | static const struct usb_ep_ops usb_ep_ops = { | |
1304 | .enable = ep_enable, | |
1305 | .disable = ep_disable, | |
1306 | .alloc_request = ep_alloc_request, | |
1307 | .free_request = ep_free_request, | |
1308 | .queue = ep_queue, | |
1309 | .dequeue = ep_dequeue, | |
1310 | .set_halt = ep_set_halt, | |
1311 | .set_wedge = ep_set_wedge, | |
1312 | .fifo_flush = ep_fifo_flush, | |
1313 | }; | |
1314 | ||
1315 | /****************************************************************************** | |
1316 | * GADGET block | |
1317 | *****************************************************************************/ | |
f01ef574 PK |
1318 | static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active) |
1319 | { | |
26c696c6 | 1320 | struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); |
f01ef574 PK |
1321 | unsigned long flags; |
1322 | int gadget_ready = 0; | |
1323 | ||
26c696c6 | 1324 | if (!(ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS)) |
f01ef574 PK |
1325 | return -EOPNOTSUPP; |
1326 | ||
26c696c6 RZ |
1327 | spin_lock_irqsave(&ci->lock, flags); |
1328 | ci->vbus_active = is_active; | |
1329 | if (ci->driver) | |
f01ef574 | 1330 | gadget_ready = 1; |
26c696c6 | 1331 | spin_unlock_irqrestore(&ci->lock, flags); |
f01ef574 PK |
1332 | |
1333 | if (gadget_ready) { | |
1334 | if (is_active) { | |
c036019e | 1335 | pm_runtime_get_sync(&_gadget->dev); |
26c696c6 RZ |
1336 | hw_device_reset(ci, USBMODE_CM_DC); |
1337 | hw_device_state(ci, ci->ep0out->qh.dma); | |
f01ef574 | 1338 | } else { |
26c696c6 RZ |
1339 | hw_device_state(ci, 0); |
1340 | if (ci->platdata->notify_event) | |
1341 | ci->platdata->notify_event(ci, | |
f01ef574 | 1342 | CI13XXX_CONTROLLER_STOPPED_EVENT); |
26c696c6 | 1343 | _gadget_stop_activity(&ci->gadget); |
c036019e | 1344 | pm_runtime_put_sync(&_gadget->dev); |
f01ef574 PK |
1345 | } |
1346 | } | |
1347 | ||
1348 | return 0; | |
1349 | } | |
1350 | ||
e2b61c1d PK |
1351 | static int ci13xxx_wakeup(struct usb_gadget *_gadget) |
1352 | { | |
26c696c6 | 1353 | struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); |
e2b61c1d PK |
1354 | unsigned long flags; |
1355 | int ret = 0; | |
1356 | ||
26c696c6 RZ |
1357 | spin_lock_irqsave(&ci->lock, flags); |
1358 | if (!ci->remote_wakeup) { | |
e2b61c1d | 1359 | ret = -EOPNOTSUPP; |
e2b61c1d PK |
1360 | goto out; |
1361 | } | |
26c696c6 | 1362 | if (!hw_read(ci, OP_PORTSC, PORTSC_SUSP)) { |
e2b61c1d | 1363 | ret = -EINVAL; |
e2b61c1d PK |
1364 | goto out; |
1365 | } | |
26c696c6 | 1366 | hw_write(ci, OP_PORTSC, PORTSC_FPR, PORTSC_FPR); |
e2b61c1d | 1367 | out: |
26c696c6 | 1368 | spin_unlock_irqrestore(&ci->lock, flags); |
e2b61c1d PK |
1369 | return ret; |
1370 | } | |
1371 | ||
d860852e PK |
1372 | static int ci13xxx_vbus_draw(struct usb_gadget *_gadget, unsigned mA) |
1373 | { | |
26c696c6 | 1374 | struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); |
d860852e | 1375 | |
26c696c6 RZ |
1376 | if (ci->transceiver) |
1377 | return usb_phy_set_power(ci->transceiver, mA); | |
d860852e PK |
1378 | return -ENOTSUPP; |
1379 | } | |
1380 | ||
c0a48e6c MG |
1381 | /* Change Data+ pullup status |
1382 | * this func is used by usb_gadget_connect/disconnet | |
1383 | */ | |
1384 | static int ci13xxx_pullup(struct usb_gadget *_gadget, int is_on) | |
1385 | { | |
1386 | struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); | |
1387 | ||
1388 | if (is_on) | |
1389 | hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS); | |
1390 | else | |
1391 | hw_write(ci, OP_USBCMD, USBCMD_RS, 0); | |
1392 | ||
1393 | return 0; | |
1394 | } | |
1395 | ||
1f339d84 AS |
1396 | static int ci13xxx_start(struct usb_gadget *gadget, |
1397 | struct usb_gadget_driver *driver); | |
1398 | static int ci13xxx_stop(struct usb_gadget *gadget, | |
1399 | struct usb_gadget_driver *driver); | |
aa69a809 DL |
1400 | /** |
1401 | * Device operations part of the API to the USB controller hardware, | |
1402 | * which don't involve endpoints (or i/o) | |
1403 | * Check "usb_gadget.h" for details | |
1404 | */ | |
f01ef574 PK |
1405 | static const struct usb_gadget_ops usb_gadget_ops = { |
1406 | .vbus_session = ci13xxx_vbus_session, | |
e2b61c1d | 1407 | .wakeup = ci13xxx_wakeup, |
c0a48e6c | 1408 | .pullup = ci13xxx_pullup, |
d860852e | 1409 | .vbus_draw = ci13xxx_vbus_draw, |
1f339d84 AS |
1410 | .udc_start = ci13xxx_start, |
1411 | .udc_stop = ci13xxx_stop, | |
f01ef574 | 1412 | }; |
aa69a809 | 1413 | |
26c696c6 | 1414 | static int init_eps(struct ci13xxx *ci) |
aa69a809 | 1415 | { |
790c2d52 | 1416 | int retval = 0, i, j; |
aa69a809 | 1417 | |
26c696c6 | 1418 | for (i = 0; i < ci->hw_ep_max/2; i++) |
ca9cfea0 | 1419 | for (j = RX; j <= TX; j++) { |
26c696c6 RZ |
1420 | int k = i + j * ci->hw_ep_max/2; |
1421 | struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[k]; | |
aa69a809 | 1422 | |
ca9cfea0 PK |
1423 | scnprintf(mEp->name, sizeof(mEp->name), "ep%i%s", i, |
1424 | (j == TX) ? "in" : "out"); | |
aa69a809 | 1425 | |
26c696c6 RZ |
1426 | mEp->ci = ci; |
1427 | mEp->lock = &ci->lock; | |
1428 | mEp->td_pool = ci->td_pool; | |
aa69a809 | 1429 | |
ca9cfea0 PK |
1430 | mEp->ep.name = mEp->name; |
1431 | mEp->ep.ops = &usb_ep_ops; | |
7f67c38b MG |
1432 | /* |
1433 | * for ep0: maxP defined in desc, for other | |
1434 | * eps, maxP is set by epautoconfig() called | |
1435 | * by gadget layer | |
1436 | */ | |
1437 | mEp->ep.maxpacket = (unsigned short)~0; | |
aa69a809 | 1438 | |
ca9cfea0 | 1439 | INIT_LIST_HEAD(&mEp->qh.queue); |
26c696c6 | 1440 | mEp->qh.ptr = dma_pool_alloc(ci->qh_pool, GFP_KERNEL, |
790c2d52 | 1441 | &mEp->qh.dma); |
ca9cfea0 | 1442 | if (mEp->qh.ptr == NULL) |
aa69a809 DL |
1443 | retval = -ENOMEM; |
1444 | else | |
ca9cfea0 PK |
1445 | memset(mEp->qh.ptr, 0, sizeof(*mEp->qh.ptr)); |
1446 | ||
d36ade60 AS |
1447 | /* |
1448 | * set up shorthands for ep0 out and in endpoints, | |
1449 | * don't add to gadget's ep_list | |
1450 | */ | |
1451 | if (i == 0) { | |
1452 | if (j == RX) | |
26c696c6 | 1453 | ci->ep0out = mEp; |
d36ade60 | 1454 | else |
26c696c6 | 1455 | ci->ep0in = mEp; |
d36ade60 | 1456 | |
7f67c38b | 1457 | mEp->ep.maxpacket = CTRL_PAYLOAD_MAX; |
ca9cfea0 | 1458 | continue; |
d36ade60 | 1459 | } |
ca9cfea0 | 1460 | |
26c696c6 | 1461 | list_add_tail(&mEp->ep.ep_list, &ci->gadget.ep_list); |
ca9cfea0 | 1462 | } |
790c2d52 AS |
1463 | |
1464 | return retval; | |
1465 | } | |
1466 | ||
ad6b1b97 MKB |
1467 | static void destroy_eps(struct ci13xxx *ci) |
1468 | { | |
1469 | int i; | |
1470 | ||
1471 | for (i = 0; i < ci->hw_ep_max; i++) { | |
1472 | struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i]; | |
1473 | ||
1474 | dma_pool_free(ci->qh_pool, mEp->qh.ptr, mEp->qh.dma); | |
1475 | } | |
1476 | } | |
1477 | ||
790c2d52 AS |
1478 | /** |
1479 | * ci13xxx_start: register a gadget driver | |
1f339d84 | 1480 | * @gadget: our gadget |
790c2d52 | 1481 | * @driver: the driver being registered |
790c2d52 | 1482 | * |
790c2d52 AS |
1483 | * Interrupts are enabled here. |
1484 | */ | |
1f339d84 AS |
1485 | static int ci13xxx_start(struct usb_gadget *gadget, |
1486 | struct usb_gadget_driver *driver) | |
790c2d52 | 1487 | { |
26c696c6 | 1488 | struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget); |
790c2d52 | 1489 | unsigned long flags; |
790c2d52 AS |
1490 | int retval = -ENOMEM; |
1491 | ||
1f339d84 | 1492 | if (driver->disconnect == NULL) |
790c2d52 | 1493 | return -EINVAL; |
790c2d52 | 1494 | |
790c2d52 | 1495 | |
26c696c6 RZ |
1496 | ci->ep0out->ep.desc = &ctrl_endpt_out_desc; |
1497 | retval = usb_ep_enable(&ci->ep0out->ep); | |
ac1aa6a2 A |
1498 | if (retval) |
1499 | return retval; | |
877c1f54 | 1500 | |
26c696c6 RZ |
1501 | ci->ep0in->ep.desc = &ctrl_endpt_in_desc; |
1502 | retval = usb_ep_enable(&ci->ep0in->ep); | |
ac1aa6a2 A |
1503 | if (retval) |
1504 | return retval; | |
26c696c6 RZ |
1505 | spin_lock_irqsave(&ci->lock, flags); |
1506 | ||
1507 | ci->driver = driver; | |
1508 | pm_runtime_get_sync(&ci->gadget.dev); | |
1509 | if (ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) { | |
1510 | if (ci->vbus_active) { | |
571bb7ab | 1511 | if (ci->platdata->flags & CI13XXX_REGS_SHARED) |
26c696c6 | 1512 | hw_device_reset(ci, USBMODE_CM_DC); |
f01ef574 | 1513 | } else { |
26c696c6 | 1514 | pm_runtime_put_sync(&ci->gadget.dev); |
f01ef574 PK |
1515 | goto done; |
1516 | } | |
1517 | } | |
1518 | ||
26c696c6 | 1519 | retval = hw_device_state(ci, ci->ep0out->qh.dma); |
c036019e | 1520 | if (retval) |
26c696c6 | 1521 | pm_runtime_put_sync(&ci->gadget.dev); |
aa69a809 DL |
1522 | |
1523 | done: | |
26c696c6 | 1524 | spin_unlock_irqrestore(&ci->lock, flags); |
aa69a809 DL |
1525 | return retval; |
1526 | } | |
aa69a809 DL |
1527 | |
1528 | /** | |
0f91349b | 1529 | * ci13xxx_stop: unregister a gadget driver |
aa69a809 | 1530 | */ |
1f339d84 AS |
1531 | static int ci13xxx_stop(struct usb_gadget *gadget, |
1532 | struct usb_gadget_driver *driver) | |
aa69a809 | 1533 | { |
26c696c6 | 1534 | struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget); |
1f339d84 | 1535 | unsigned long flags; |
aa69a809 | 1536 | |
26c696c6 | 1537 | spin_lock_irqsave(&ci->lock, flags); |
aa69a809 | 1538 | |
26c696c6 RZ |
1539 | if (!(ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) || |
1540 | ci->vbus_active) { | |
1541 | hw_device_state(ci, 0); | |
1542 | if (ci->platdata->notify_event) | |
1543 | ci->platdata->notify_event(ci, | |
f01ef574 | 1544 | CI13XXX_CONTROLLER_STOPPED_EVENT); |
26c696c6 RZ |
1545 | ci->driver = NULL; |
1546 | spin_unlock_irqrestore(&ci->lock, flags); | |
1547 | _gadget_stop_activity(&ci->gadget); | |
1548 | spin_lock_irqsave(&ci->lock, flags); | |
1549 | pm_runtime_put(&ci->gadget.dev); | |
f01ef574 | 1550 | } |
aa69a809 | 1551 | |
26c696c6 | 1552 | spin_unlock_irqrestore(&ci->lock, flags); |
aa69a809 | 1553 | |
aa69a809 DL |
1554 | return 0; |
1555 | } | |
aa69a809 DL |
1556 | |
1557 | /****************************************************************************** | |
1558 | * BUS block | |
1559 | *****************************************************************************/ | |
1560 | /** | |
26c696c6 | 1561 | * udc_irq: ci interrupt handler |
aa69a809 DL |
1562 | * |
1563 | * This function returns IRQ_HANDLED if the IRQ has been handled | |
1564 | * It locks access to registers | |
1565 | */ | |
26c696c6 | 1566 | static irqreturn_t udc_irq(struct ci13xxx *ci) |
aa69a809 | 1567 | { |
aa69a809 DL |
1568 | irqreturn_t retval; |
1569 | u32 intr; | |
1570 | ||
26c696c6 | 1571 | if (ci == NULL) |
aa69a809 | 1572 | return IRQ_HANDLED; |
aa69a809 | 1573 | |
26c696c6 | 1574 | spin_lock(&ci->lock); |
f01ef574 | 1575 | |
26c696c6 RZ |
1576 | if (ci->platdata->flags & CI13XXX_REGS_SHARED) { |
1577 | if (hw_read(ci, OP_USBMODE, USBMODE_CM) != | |
758fc986 | 1578 | USBMODE_CM_DC) { |
26c696c6 | 1579 | spin_unlock(&ci->lock); |
f01ef574 PK |
1580 | return IRQ_NONE; |
1581 | } | |
1582 | } | |
26c696c6 | 1583 | intr = hw_test_and_clear_intr_active(ci); |
aa69a809 | 1584 | |
e443b333 | 1585 | if (intr) { |
aa69a809 | 1586 | /* order defines priority - do NOT change it */ |
e443b333 | 1587 | if (USBi_URI & intr) |
26c696c6 | 1588 | isr_reset_handler(ci); |
e443b333 | 1589 | |
aa69a809 | 1590 | if (USBi_PCI & intr) { |
26c696c6 | 1591 | ci->gadget.speed = hw_port_is_high_speed(ci) ? |
aa69a809 | 1592 | USB_SPEED_HIGH : USB_SPEED_FULL; |
26c696c6 RZ |
1593 | if (ci->suspended && ci->driver->resume) { |
1594 | spin_unlock(&ci->lock); | |
1595 | ci->driver->resume(&ci->gadget); | |
1596 | spin_lock(&ci->lock); | |
1597 | ci->suspended = 0; | |
e2b61c1d | 1598 | } |
aa69a809 | 1599 | } |
e443b333 AS |
1600 | |
1601 | if (USBi_UI & intr) | |
26c696c6 | 1602 | isr_tr_complete_handler(ci); |
e443b333 | 1603 | |
e2b61c1d | 1604 | if (USBi_SLI & intr) { |
26c696c6 RZ |
1605 | if (ci->gadget.speed != USB_SPEED_UNKNOWN && |
1606 | ci->driver->suspend) { | |
1607 | ci->suspended = 1; | |
1608 | spin_unlock(&ci->lock); | |
1609 | ci->driver->suspend(&ci->gadget); | |
1610 | spin_lock(&ci->lock); | |
e2b61c1d | 1611 | } |
e2b61c1d | 1612 | } |
aa69a809 DL |
1613 | retval = IRQ_HANDLED; |
1614 | } else { | |
aa69a809 DL |
1615 | retval = IRQ_NONE; |
1616 | } | |
26c696c6 | 1617 | spin_unlock(&ci->lock); |
aa69a809 DL |
1618 | |
1619 | return retval; | |
1620 | } | |
1621 | ||
1622 | /** | |
1623 | * udc_release: driver release function | |
1624 | * @dev: device | |
1625 | * | |
1626 | * Currently does nothing | |
1627 | */ | |
1628 | static void udc_release(struct device *dev) | |
1629 | { | |
aa69a809 DL |
1630 | } |
1631 | ||
1632 | /** | |
5f36e231 | 1633 | * udc_start: initialize gadget role |
26c696c6 | 1634 | * @ci: chipidea controller |
aa69a809 | 1635 | */ |
26c696c6 | 1636 | static int udc_start(struct ci13xxx *ci) |
aa69a809 | 1637 | { |
26c696c6 | 1638 | struct device *dev = ci->dev; |
aa69a809 DL |
1639 | int retval = 0; |
1640 | ||
26c696c6 | 1641 | spin_lock_init(&ci->lock); |
aa69a809 | 1642 | |
26c696c6 RZ |
1643 | ci->gadget.ops = &usb_gadget_ops; |
1644 | ci->gadget.speed = USB_SPEED_UNKNOWN; | |
1645 | ci->gadget.max_speed = USB_SPEED_HIGH; | |
1646 | ci->gadget.is_otg = 0; | |
1647 | ci->gadget.name = ci->platdata->name; | |
aa69a809 | 1648 | |
26c696c6 | 1649 | INIT_LIST_HEAD(&ci->gadget.ep_list); |
aa69a809 | 1650 | |
26c696c6 RZ |
1651 | dev_set_name(&ci->gadget.dev, "gadget"); |
1652 | ci->gadget.dev.dma_mask = dev->dma_mask; | |
1653 | ci->gadget.dev.coherent_dma_mask = dev->coherent_dma_mask; | |
1654 | ci->gadget.dev.parent = dev; | |
1655 | ci->gadget.dev.release = udc_release; | |
aa69a809 | 1656 | |
790c2d52 | 1657 | /* alloc resources */ |
26c696c6 | 1658 | ci->qh_pool = dma_pool_create("ci13xxx_qh", dev, |
790c2d52 AS |
1659 | sizeof(struct ci13xxx_qh), |
1660 | 64, CI13XXX_PAGE_SIZE); | |
26c696c6 | 1661 | if (ci->qh_pool == NULL) |
5f36e231 | 1662 | return -ENOMEM; |
790c2d52 | 1663 | |
26c696c6 | 1664 | ci->td_pool = dma_pool_create("ci13xxx_td", dev, |
790c2d52 AS |
1665 | sizeof(struct ci13xxx_td), |
1666 | 64, CI13XXX_PAGE_SIZE); | |
26c696c6 | 1667 | if (ci->td_pool == NULL) { |
790c2d52 AS |
1668 | retval = -ENOMEM; |
1669 | goto free_qh_pool; | |
1670 | } | |
1671 | ||
26c696c6 | 1672 | retval = init_eps(ci); |
790c2d52 AS |
1673 | if (retval) |
1674 | goto free_pools; | |
1675 | ||
26c696c6 | 1676 | ci->gadget.ep0 = &ci->ep0in->ep; |
f01ef574 | 1677 | |
a2c3d690 RZ |
1678 | if (ci->global_phy) |
1679 | ci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2); | |
f01ef574 | 1680 | |
26c696c6 RZ |
1681 | if (ci->platdata->flags & CI13XXX_REQUIRE_TRANSCEIVER) { |
1682 | if (ci->transceiver == NULL) { | |
f01ef574 | 1683 | retval = -ENODEV; |
ad6b1b97 | 1684 | goto destroy_eps; |
f01ef574 PK |
1685 | } |
1686 | } | |
1687 | ||
26c696c6 RZ |
1688 | if (!(ci->platdata->flags & CI13XXX_REGS_SHARED)) { |
1689 | retval = hw_device_reset(ci, USBMODE_CM_DC); | |
f01ef574 PK |
1690 | if (retval) |
1691 | goto put_transceiver; | |
1692 | } | |
1693 | ||
26c696c6 | 1694 | retval = device_register(&ci->gadget.dev); |
f01ef574 | 1695 | if (retval) { |
26c696c6 | 1696 | put_device(&ci->gadget.dev); |
f01ef574 PK |
1697 | goto put_transceiver; |
1698 | } | |
aa69a809 | 1699 | |
26c696c6 RZ |
1700 | if (!IS_ERR_OR_NULL(ci->transceiver)) { |
1701 | retval = otg_set_peripheral(ci->transceiver->otg, | |
1702 | &ci->gadget); | |
f01ef574 | 1703 | if (retval) |
adf0f735 | 1704 | goto unreg_device; |
aa69a809 | 1705 | } |
0f91349b | 1706 | |
26c696c6 | 1707 | retval = usb_add_gadget_udc(dev, &ci->gadget); |
0f91349b SAS |
1708 | if (retval) |
1709 | goto remove_trans; | |
1710 | ||
26c696c6 RZ |
1711 | pm_runtime_no_callbacks(&ci->gadget.dev); |
1712 | pm_runtime_enable(&ci->gadget.dev); | |
aa69a809 | 1713 | |
aa69a809 DL |
1714 | return retval; |
1715 | ||
0f91349b | 1716 | remove_trans: |
26c696c6 | 1717 | if (!IS_ERR_OR_NULL(ci->transceiver)) { |
c9d1f947 | 1718 | otg_set_peripheral(ci->transceiver->otg, NULL); |
a2c3d690 RZ |
1719 | if (ci->global_phy) |
1720 | usb_put_phy(ci->transceiver); | |
0f91349b SAS |
1721 | } |
1722 | ||
0917ba84 | 1723 | dev_err(dev, "error = %i\n", retval); |
f01ef574 | 1724 | unreg_device: |
26c696c6 | 1725 | device_unregister(&ci->gadget.dev); |
f01ef574 | 1726 | put_transceiver: |
a2c3d690 | 1727 | if (!IS_ERR_OR_NULL(ci->transceiver) && ci->global_phy) |
26c696c6 | 1728 | usb_put_phy(ci->transceiver); |
ad6b1b97 MKB |
1729 | destroy_eps: |
1730 | destroy_eps(ci); | |
790c2d52 | 1731 | free_pools: |
26c696c6 | 1732 | dma_pool_destroy(ci->td_pool); |
790c2d52 | 1733 | free_qh_pool: |
26c696c6 | 1734 | dma_pool_destroy(ci->qh_pool); |
aa69a809 DL |
1735 | return retval; |
1736 | } | |
1737 | ||
1738 | /** | |
1739 | * udc_remove: parent remove must call this to remove UDC | |
1740 | * | |
1741 | * No interrupts active, the IRQ has been released | |
1742 | */ | |
26c696c6 | 1743 | static void udc_stop(struct ci13xxx *ci) |
aa69a809 | 1744 | { |
26c696c6 | 1745 | if (ci == NULL) |
aa69a809 | 1746 | return; |
0f089094 | 1747 | |
26c696c6 | 1748 | usb_del_gadget_udc(&ci->gadget); |
aa69a809 | 1749 | |
ad6b1b97 | 1750 | destroy_eps(ci); |
790c2d52 | 1751 | |
26c696c6 RZ |
1752 | dma_pool_destroy(ci->td_pool); |
1753 | dma_pool_destroy(ci->qh_pool); | |
790c2d52 | 1754 | |
26c696c6 RZ |
1755 | if (!IS_ERR_OR_NULL(ci->transceiver)) { |
1756 | otg_set_peripheral(ci->transceiver->otg, NULL); | |
a2c3d690 RZ |
1757 | if (ci->global_phy) |
1758 | usb_put_phy(ci->transceiver); | |
f01ef574 | 1759 | } |
26c696c6 | 1760 | device_unregister(&ci->gadget.dev); |
5f36e231 | 1761 | /* my kobject is dynamic, I swear! */ |
26c696c6 | 1762 | memset(&ci->gadget, 0, sizeof(ci->gadget)); |
5f36e231 AS |
1763 | } |
1764 | ||
1765 | /** | |
1766 | * ci_hdrc_gadget_init - initialize device related bits | |
1767 | * ci: the controller | |
1768 | * | |
1769 | * This function enables the gadget role, if the device is "device capable". | |
1770 | */ | |
1771 | int ci_hdrc_gadget_init(struct ci13xxx *ci) | |
1772 | { | |
1773 | struct ci_role_driver *rdrv; | |
1774 | ||
1775 | if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DC)) | |
1776 | return -ENXIO; | |
1777 | ||
1778 | rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL); | |
1779 | if (!rdrv) | |
1780 | return -ENOMEM; | |
1781 | ||
1782 | rdrv->start = udc_start; | |
1783 | rdrv->stop = udc_stop; | |
1784 | rdrv->irq = udc_irq; | |
1785 | rdrv->name = "gadget"; | |
1786 | ci->roles[CI_ROLE_GADGET] = rdrv; | |
aa69a809 | 1787 | |
5f36e231 | 1788 | return 0; |
aa69a809 | 1789 | } |