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Commit | Line | Data |
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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> | |
16 | #include <linux/dma-mapping.h> | |
ded017ee | 17 | #include <linux/err.h> |
aa69a809 | 18 | #include <linux/init.h> |
62bb84ed AS |
19 | #include <linux/platform_device.h> |
20 | #include <linux/module.h> | |
aa69a809 | 21 | #include <linux/interrupt.h> |
aa69a809 DL |
22 | #include <linux/io.h> |
23 | #include <linux/irq.h> | |
24 | #include <linux/kernel.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
c036019e | 26 | #include <linux/pm_runtime.h> |
aa69a809 DL |
27 | #include <linux/usb/ch9.h> |
28 | #include <linux/usb/gadget.h> | |
f01ef574 | 29 | #include <linux/usb/otg.h> |
e443b333 | 30 | #include <linux/usb/chipidea.h> |
aa69a809 | 31 | |
e443b333 AS |
32 | #include "ci.h" |
33 | #include "udc.h" | |
34 | #include "bits.h" | |
35 | #include "debug.h" | |
954aad8c | 36 | |
aa69a809 DL |
37 | /* control endpoint description */ |
38 | static const struct usb_endpoint_descriptor | |
ca9cfea0 | 39 | ctrl_endpt_out_desc = { |
aa69a809 DL |
40 | .bLength = USB_DT_ENDPOINT_SIZE, |
41 | .bDescriptorType = USB_DT_ENDPOINT, | |
42 | ||
ca9cfea0 PK |
43 | .bEndpointAddress = USB_DIR_OUT, |
44 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, | |
45 | .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX), | |
46 | }; | |
47 | ||
48 | static const struct usb_endpoint_descriptor | |
49 | ctrl_endpt_in_desc = { | |
50 | .bLength = USB_DT_ENDPOINT_SIZE, | |
51 | .bDescriptorType = USB_DT_ENDPOINT, | |
52 | ||
53 | .bEndpointAddress = USB_DIR_IN, | |
aa69a809 DL |
54 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, |
55 | .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX), | |
56 | }; | |
57 | ||
aa69a809 DL |
58 | /** |
59 | * hw_ep_bit: calculates the bit number | |
60 | * @num: endpoint number | |
61 | * @dir: endpoint direction | |
62 | * | |
63 | * This function returns bit number | |
64 | */ | |
65 | static inline int hw_ep_bit(int num, int dir) | |
66 | { | |
67 | return num + (dir ? 16 : 0); | |
68 | } | |
69 | ||
26c696c6 | 70 | static inline int ep_to_bit(struct ci13xxx *ci, int n) |
dd39c358 | 71 | { |
26c696c6 | 72 | int fill = 16 - ci->hw_ep_max / 2; |
dd39c358 | 73 | |
26c696c6 | 74 | if (n >= ci->hw_ep_max / 2) |
dd39c358 MKB |
75 | n += fill; |
76 | ||
77 | return n; | |
78 | } | |
79 | ||
aa69a809 | 80 | /** |
c0a48e6c | 81 | * hw_device_state: enables/disables interrupts (execute without interruption) |
aa69a809 DL |
82 | * @dma: 0 => disable, !0 => enable and set dma engine |
83 | * | |
84 | * This function returns an error code | |
85 | */ | |
26c696c6 | 86 | static int hw_device_state(struct ci13xxx *ci, u32 dma) |
aa69a809 DL |
87 | { |
88 | if (dma) { | |
26c696c6 | 89 | hw_write(ci, OP_ENDPTLISTADDR, ~0, dma); |
aa69a809 | 90 | /* interrupt, error, port change, reset, sleep/suspend */ |
26c696c6 | 91 | hw_write(ci, OP_USBINTR, ~0, |
aa69a809 | 92 | USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI); |
aa69a809 | 93 | } else { |
26c696c6 | 94 | hw_write(ci, OP_USBINTR, ~0, 0); |
aa69a809 DL |
95 | } |
96 | return 0; | |
97 | } | |
98 | ||
99 | /** | |
100 | * hw_ep_flush: flush endpoint fifo (execute without interruption) | |
101 | * @num: endpoint number | |
102 | * @dir: endpoint direction | |
103 | * | |
104 | * This function returns an error code | |
105 | */ | |
26c696c6 | 106 | static int hw_ep_flush(struct ci13xxx *ci, int num, int dir) |
aa69a809 DL |
107 | { |
108 | int n = hw_ep_bit(num, dir); | |
109 | ||
110 | do { | |
111 | /* flush any pending transfer */ | |
26c696c6 RZ |
112 | hw_write(ci, OP_ENDPTFLUSH, BIT(n), BIT(n)); |
113 | while (hw_read(ci, OP_ENDPTFLUSH, BIT(n))) | |
aa69a809 | 114 | cpu_relax(); |
26c696c6 | 115 | } while (hw_read(ci, OP_ENDPTSTAT, BIT(n))); |
aa69a809 DL |
116 | |
117 | return 0; | |
118 | } | |
119 | ||
120 | /** | |
121 | * hw_ep_disable: disables endpoint (execute without interruption) | |
122 | * @num: endpoint number | |
123 | * @dir: endpoint direction | |
124 | * | |
125 | * This function returns an error code | |
126 | */ | |
26c696c6 | 127 | static int hw_ep_disable(struct ci13xxx *ci, int num, int dir) |
aa69a809 | 128 | { |
26c696c6 RZ |
129 | hw_ep_flush(ci, num, dir); |
130 | hw_write(ci, OP_ENDPTCTRL + num, | |
d3595d13 | 131 | dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0); |
aa69a809 DL |
132 | return 0; |
133 | } | |
134 | ||
135 | /** | |
136 | * hw_ep_enable: enables endpoint (execute without interruption) | |
137 | * @num: endpoint number | |
138 | * @dir: endpoint direction | |
139 | * @type: endpoint type | |
140 | * | |
141 | * This function returns an error code | |
142 | */ | |
26c696c6 | 143 | static int hw_ep_enable(struct ci13xxx *ci, int num, int dir, int type) |
aa69a809 DL |
144 | { |
145 | u32 mask, data; | |
146 | ||
147 | if (dir) { | |
148 | mask = ENDPTCTRL_TXT; /* type */ | |
149 | data = type << ffs_nr(mask); | |
150 | ||
151 | mask |= ENDPTCTRL_TXS; /* unstall */ | |
152 | mask |= ENDPTCTRL_TXR; /* reset data toggle */ | |
153 | data |= ENDPTCTRL_TXR; | |
154 | mask |= ENDPTCTRL_TXE; /* enable */ | |
155 | data |= ENDPTCTRL_TXE; | |
156 | } else { | |
157 | mask = ENDPTCTRL_RXT; /* type */ | |
158 | data = type << ffs_nr(mask); | |
159 | ||
160 | mask |= ENDPTCTRL_RXS; /* unstall */ | |
161 | mask |= ENDPTCTRL_RXR; /* reset data toggle */ | |
162 | data |= ENDPTCTRL_RXR; | |
163 | mask |= ENDPTCTRL_RXE; /* enable */ | |
164 | data |= ENDPTCTRL_RXE; | |
165 | } | |
26c696c6 | 166 | hw_write(ci, OP_ENDPTCTRL + num, mask, data); |
aa69a809 DL |
167 | return 0; |
168 | } | |
169 | ||
170 | /** | |
171 | * hw_ep_get_halt: return endpoint halt status | |
172 | * @num: endpoint number | |
173 | * @dir: endpoint direction | |
174 | * | |
175 | * This function returns 1 if endpoint halted | |
176 | */ | |
26c696c6 | 177 | static int hw_ep_get_halt(struct ci13xxx *ci, int num, int dir) |
aa69a809 DL |
178 | { |
179 | u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS; | |
180 | ||
26c696c6 | 181 | return hw_read(ci, OP_ENDPTCTRL + num, mask) ? 1 : 0; |
aa69a809 DL |
182 | } |
183 | ||
aa69a809 DL |
184 | /** |
185 | * hw_test_and_clear_setup_status: test & clear setup status (execute without | |
186 | * interruption) | |
dd39c358 | 187 | * @n: endpoint number |
aa69a809 DL |
188 | * |
189 | * This function returns setup status | |
190 | */ | |
26c696c6 | 191 | static int hw_test_and_clear_setup_status(struct ci13xxx *ci, int n) |
aa69a809 | 192 | { |
26c696c6 RZ |
193 | n = ep_to_bit(ci, n); |
194 | return hw_test_and_clear(ci, OP_ENDPTSETUPSTAT, BIT(n)); | |
aa69a809 DL |
195 | } |
196 | ||
197 | /** | |
198 | * hw_ep_prime: primes endpoint (execute without interruption) | |
199 | * @num: endpoint number | |
200 | * @dir: endpoint direction | |
201 | * @is_ctrl: true if control endpoint | |
202 | * | |
203 | * This function returns an error code | |
204 | */ | |
26c696c6 | 205 | static int hw_ep_prime(struct ci13xxx *ci, int num, int dir, int is_ctrl) |
aa69a809 DL |
206 | { |
207 | int n = hw_ep_bit(num, dir); | |
208 | ||
26c696c6 | 209 | if (is_ctrl && dir == RX && hw_read(ci, OP_ENDPTSETUPSTAT, BIT(num))) |
aa69a809 DL |
210 | return -EAGAIN; |
211 | ||
26c696c6 | 212 | hw_write(ci, OP_ENDPTPRIME, BIT(n), BIT(n)); |
aa69a809 | 213 | |
26c696c6 | 214 | while (hw_read(ci, OP_ENDPTPRIME, BIT(n))) |
aa69a809 | 215 | cpu_relax(); |
26c696c6 | 216 | if (is_ctrl && dir == RX && hw_read(ci, OP_ENDPTSETUPSTAT, BIT(num))) |
aa69a809 DL |
217 | return -EAGAIN; |
218 | ||
219 | /* status shoult be tested according with manual but it doesn't work */ | |
220 | return 0; | |
221 | } | |
222 | ||
223 | /** | |
224 | * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute | |
225 | * without interruption) | |
226 | * @num: endpoint number | |
227 | * @dir: endpoint direction | |
228 | * @value: true => stall, false => unstall | |
229 | * | |
230 | * This function returns an error code | |
231 | */ | |
26c696c6 | 232 | static int hw_ep_set_halt(struct ci13xxx *ci, int num, int dir, int value) |
aa69a809 DL |
233 | { |
234 | if (value != 0 && value != 1) | |
235 | return -EINVAL; | |
236 | ||
237 | do { | |
262c1632 | 238 | enum ci13xxx_regs reg = OP_ENDPTCTRL + num; |
aa69a809 DL |
239 | u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS; |
240 | u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR; | |
241 | ||
242 | /* data toggle - reserved for EP0 but it's in ESS */ | |
26c696c6 | 243 | hw_write(ci, reg, mask_xs|mask_xr, |
262c1632 | 244 | value ? mask_xs : mask_xr); |
26c696c6 | 245 | } while (value != hw_ep_get_halt(ci, num, dir)); |
aa69a809 DL |
246 | |
247 | return 0; | |
248 | } | |
249 | ||
aa69a809 DL |
250 | /** |
251 | * hw_is_port_high_speed: test if port is high speed | |
252 | * | |
253 | * This function returns true if high speed port | |
254 | */ | |
26c696c6 | 255 | static int hw_port_is_high_speed(struct ci13xxx *ci) |
aa69a809 | 256 | { |
26c696c6 RZ |
257 | return ci->hw_bank.lpm ? hw_read(ci, OP_DEVLC, DEVLC_PSPD) : |
258 | hw_read(ci, OP_PORTSC, PORTSC_HSP); | |
aa69a809 DL |
259 | } |
260 | ||
aa69a809 DL |
261 | /** |
262 | * hw_read_intr_enable: returns interrupt enable register | |
263 | * | |
264 | * This function returns register data | |
265 | */ | |
26c696c6 | 266 | static u32 hw_read_intr_enable(struct ci13xxx *ci) |
aa69a809 | 267 | { |
26c696c6 | 268 | return hw_read(ci, OP_USBINTR, ~0); |
aa69a809 DL |
269 | } |
270 | ||
271 | /** | |
272 | * hw_read_intr_status: returns interrupt status register | |
273 | * | |
274 | * This function returns register data | |
275 | */ | |
26c696c6 | 276 | static u32 hw_read_intr_status(struct ci13xxx *ci) |
aa69a809 | 277 | { |
26c696c6 | 278 | return hw_read(ci, OP_USBSTS, ~0); |
aa69a809 DL |
279 | } |
280 | ||
aa69a809 DL |
281 | /** |
282 | * hw_test_and_clear_complete: test & clear complete status (execute without | |
283 | * interruption) | |
dd39c358 | 284 | * @n: endpoint number |
aa69a809 DL |
285 | * |
286 | * This function returns complete status | |
287 | */ | |
26c696c6 | 288 | static int hw_test_and_clear_complete(struct ci13xxx *ci, int n) |
aa69a809 | 289 | { |
26c696c6 RZ |
290 | n = ep_to_bit(ci, n); |
291 | return hw_test_and_clear(ci, OP_ENDPTCOMPLETE, BIT(n)); | |
aa69a809 DL |
292 | } |
293 | ||
294 | /** | |
295 | * hw_test_and_clear_intr_active: test & clear active interrupts (execute | |
296 | * without interruption) | |
297 | * | |
298 | * This function returns active interrutps | |
299 | */ | |
26c696c6 | 300 | static u32 hw_test_and_clear_intr_active(struct ci13xxx *ci) |
aa69a809 | 301 | { |
26c696c6 | 302 | u32 reg = hw_read_intr_status(ci) & hw_read_intr_enable(ci); |
aa69a809 | 303 | |
26c696c6 | 304 | hw_write(ci, OP_USBSTS, ~0, reg); |
aa69a809 DL |
305 | return reg; |
306 | } | |
307 | ||
308 | /** | |
309 | * hw_test_and_clear_setup_guard: test & clear setup guard (execute without | |
310 | * interruption) | |
311 | * | |
312 | * This function returns guard value | |
313 | */ | |
26c696c6 | 314 | static int hw_test_and_clear_setup_guard(struct ci13xxx *ci) |
aa69a809 | 315 | { |
26c696c6 | 316 | return hw_test_and_write(ci, OP_USBCMD, USBCMD_SUTW, 0); |
aa69a809 DL |
317 | } |
318 | ||
319 | /** | |
320 | * hw_test_and_set_setup_guard: test & set setup guard (execute without | |
321 | * interruption) | |
322 | * | |
323 | * This function returns guard value | |
324 | */ | |
26c696c6 | 325 | static int hw_test_and_set_setup_guard(struct ci13xxx *ci) |
aa69a809 | 326 | { |
26c696c6 | 327 | return hw_test_and_write(ci, OP_USBCMD, USBCMD_SUTW, USBCMD_SUTW); |
aa69a809 DL |
328 | } |
329 | ||
330 | /** | |
331 | * hw_usb_set_address: configures USB address (execute without interruption) | |
332 | * @value: new USB address | |
333 | * | |
ef15e549 AS |
334 | * This function explicitly sets the address, without the "USBADRA" (advance) |
335 | * feature, which is not supported by older versions of the controller. | |
aa69a809 | 336 | */ |
26c696c6 | 337 | static void hw_usb_set_address(struct ci13xxx *ci, u8 value) |
aa69a809 | 338 | { |
26c696c6 | 339 | hw_write(ci, OP_DEVICEADDR, DEVICEADDR_USBADR, |
ef15e549 | 340 | value << ffs_nr(DEVICEADDR_USBADR)); |
aa69a809 DL |
341 | } |
342 | ||
343 | /** | |
344 | * hw_usb_reset: restart device after a bus reset (execute without | |
345 | * interruption) | |
346 | * | |
347 | * This function returns an error code | |
348 | */ | |
26c696c6 | 349 | static int hw_usb_reset(struct ci13xxx *ci) |
aa69a809 | 350 | { |
26c696c6 | 351 | hw_usb_set_address(ci, 0); |
aa69a809 DL |
352 | |
353 | /* ESS flushes only at end?!? */ | |
26c696c6 | 354 | hw_write(ci, OP_ENDPTFLUSH, ~0, ~0); |
aa69a809 DL |
355 | |
356 | /* clear setup token semaphores */ | |
26c696c6 | 357 | hw_write(ci, OP_ENDPTSETUPSTAT, 0, 0); |
aa69a809 DL |
358 | |
359 | /* clear complete status */ | |
26c696c6 | 360 | hw_write(ci, OP_ENDPTCOMPLETE, 0, 0); |
aa69a809 DL |
361 | |
362 | /* wait until all bits cleared */ | |
26c696c6 | 363 | while (hw_read(ci, OP_ENDPTPRIME, ~0)) |
aa69a809 DL |
364 | udelay(10); /* not RTOS friendly */ |
365 | ||
366 | /* reset all endpoints ? */ | |
367 | ||
368 | /* reset internal status and wait for further instructions | |
369 | no need to verify the port reset status (ESS does it) */ | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
aa69a809 DL |
374 | /****************************************************************************** |
375 | * UTIL block | |
376 | *****************************************************************************/ | |
377 | /** | |
378 | * _usb_addr: calculates endpoint address from direction & number | |
379 | * @ep: endpoint | |
380 | */ | |
381 | static inline u8 _usb_addr(struct ci13xxx_ep *ep) | |
382 | { | |
383 | return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num; | |
384 | } | |
385 | ||
386 | /** | |
387 | * _hardware_queue: configures a request at hardware level | |
388 | * @gadget: gadget | |
389 | * @mEp: endpoint | |
390 | * | |
391 | * This function returns an error code | |
392 | */ | |
393 | static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq) | |
394 | { | |
26c696c6 | 395 | struct ci13xxx *ci = mEp->ci; |
aa69a809 | 396 | unsigned i; |
0e6ca199 PK |
397 | int ret = 0; |
398 | unsigned length = mReq->req.length; | |
aa69a809 | 399 | |
aa69a809 DL |
400 | /* don't queue twice */ |
401 | if (mReq->req.status == -EALREADY) | |
402 | return -EALREADY; | |
403 | ||
aa69a809 | 404 | mReq->req.status = -EALREADY; |
aa69a809 | 405 | |
0e6ca199 PK |
406 | if (mReq->req.zero && length && (length % mEp->ep.maxpacket == 0)) { |
407 | mReq->zptr = dma_pool_alloc(mEp->td_pool, GFP_ATOMIC, | |
408 | &mReq->zdma); | |
5e0aa49e | 409 | if (mReq->zptr == NULL) |
0e6ca199 | 410 | return -ENOMEM; |
5e0aa49e | 411 | |
0e6ca199 PK |
412 | memset(mReq->zptr, 0, sizeof(*mReq->zptr)); |
413 | mReq->zptr->next = TD_TERMINATE; | |
414 | mReq->zptr->token = TD_STATUS_ACTIVE; | |
415 | if (!mReq->req.no_interrupt) | |
416 | mReq->zptr->token |= TD_IOC; | |
417 | } | |
26c696c6 | 418 | ret = usb_gadget_map_request(&ci->gadget, &mReq->req, mEp->dir); |
5e0aa49e AS |
419 | if (ret) |
420 | return ret; | |
421 | ||
aa69a809 DL |
422 | /* |
423 | * TD configuration | |
424 | * TODO - handle requests which spawns into several TDs | |
425 | */ | |
426 | memset(mReq->ptr, 0, sizeof(*mReq->ptr)); | |
0e6ca199 | 427 | mReq->ptr->token = length << ffs_nr(TD_TOTAL_BYTES); |
aa69a809 | 428 | mReq->ptr->token &= TD_TOTAL_BYTES; |
aa69a809 | 429 | mReq->ptr->token |= TD_STATUS_ACTIVE; |
0e6ca199 PK |
430 | if (mReq->zptr) { |
431 | mReq->ptr->next = mReq->zdma; | |
432 | } else { | |
433 | mReq->ptr->next = TD_TERMINATE; | |
434 | if (!mReq->req.no_interrupt) | |
435 | mReq->ptr->token |= TD_IOC; | |
436 | } | |
aa69a809 DL |
437 | mReq->ptr->page[0] = mReq->req.dma; |
438 | for (i = 1; i < 5; i++) | |
439 | mReq->ptr->page[i] = | |
0a313c4d | 440 | (mReq->req.dma + i * CI13XXX_PAGE_SIZE) & ~TD_RESERVED_MASK; |
aa69a809 | 441 | |
0e6ca199 PK |
442 | if (!list_empty(&mEp->qh.queue)) { |
443 | struct ci13xxx_req *mReqPrev; | |
444 | int n = hw_ep_bit(mEp->num, mEp->dir); | |
445 | int tmp_stat; | |
446 | ||
447 | mReqPrev = list_entry(mEp->qh.queue.prev, | |
448 | struct ci13xxx_req, queue); | |
449 | if (mReqPrev->zptr) | |
450 | mReqPrev->zptr->next = mReq->dma & TD_ADDR_MASK; | |
451 | else | |
452 | mReqPrev->ptr->next = mReq->dma & TD_ADDR_MASK; | |
453 | wmb(); | |
26c696c6 | 454 | if (hw_read(ci, OP_ENDPTPRIME, BIT(n))) |
0e6ca199 PK |
455 | goto done; |
456 | do { | |
26c696c6 RZ |
457 | hw_write(ci, OP_USBCMD, USBCMD_ATDTW, USBCMD_ATDTW); |
458 | tmp_stat = hw_read(ci, OP_ENDPTSTAT, BIT(n)); | |
459 | } while (!hw_read(ci, OP_USBCMD, USBCMD_ATDTW)); | |
460 | hw_write(ci, OP_USBCMD, USBCMD_ATDTW, 0); | |
0e6ca199 PK |
461 | if (tmp_stat) |
462 | goto done; | |
463 | } | |
464 | ||
465 | /* QH configuration */ | |
ca9cfea0 PK |
466 | mEp->qh.ptr->td.next = mReq->dma; /* TERMINATE = 0 */ |
467 | mEp->qh.ptr->td.token &= ~TD_STATUS; /* clear status */ | |
0e6ca199 | 468 | mEp->qh.ptr->cap |= QH_ZLT; |
aa69a809 DL |
469 | |
470 | wmb(); /* synchronize before ep prime */ | |
471 | ||
26c696c6 | 472 | ret = hw_ep_prime(ci, mEp->num, mEp->dir, |
aa69a809 | 473 | mEp->type == USB_ENDPOINT_XFER_CONTROL); |
0e6ca199 PK |
474 | done: |
475 | return ret; | |
aa69a809 DL |
476 | } |
477 | ||
478 | /** | |
479 | * _hardware_dequeue: handles a request at hardware level | |
480 | * @gadget: gadget | |
481 | * @mEp: endpoint | |
482 | * | |
483 | * This function returns an error code | |
484 | */ | |
485 | static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq) | |
486 | { | |
aa69a809 DL |
487 | if (mReq->req.status != -EALREADY) |
488 | return -EINVAL; | |
489 | ||
0e6ca199 PK |
490 | if ((TD_STATUS_ACTIVE & mReq->ptr->token) != 0) |
491 | return -EBUSY; | |
492 | ||
493 | if (mReq->zptr) { | |
494 | if ((TD_STATUS_ACTIVE & mReq->zptr->token) != 0) | |
495 | return -EBUSY; | |
496 | dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma); | |
497 | mReq->zptr = NULL; | |
498 | } | |
aa69a809 DL |
499 | |
500 | mReq->req.status = 0; | |
501 | ||
26c696c6 | 502 | usb_gadget_unmap_request(&mEp->ci->gadget, &mReq->req, mEp->dir); |
aa69a809 DL |
503 | |
504 | mReq->req.status = mReq->ptr->token & TD_STATUS; | |
0e6ca199 | 505 | if ((TD_STATUS_HALTED & mReq->req.status) != 0) |
aa69a809 DL |
506 | mReq->req.status = -1; |
507 | else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0) | |
508 | mReq->req.status = -1; | |
509 | else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0) | |
510 | mReq->req.status = -1; | |
511 | ||
512 | mReq->req.actual = mReq->ptr->token & TD_TOTAL_BYTES; | |
513 | mReq->req.actual >>= ffs_nr(TD_TOTAL_BYTES); | |
514 | mReq->req.actual = mReq->req.length - mReq->req.actual; | |
515 | mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual; | |
516 | ||
517 | return mReq->req.actual; | |
518 | } | |
519 | ||
520 | /** | |
521 | * _ep_nuke: dequeues all endpoint requests | |
522 | * @mEp: endpoint | |
523 | * | |
524 | * This function returns an error code | |
525 | * Caller must hold lock | |
526 | */ | |
527 | static int _ep_nuke(struct ci13xxx_ep *mEp) | |
528 | __releases(mEp->lock) | |
529 | __acquires(mEp->lock) | |
530 | { | |
aa69a809 DL |
531 | if (mEp == NULL) |
532 | return -EINVAL; | |
533 | ||
26c696c6 | 534 | hw_ep_flush(mEp->ci, mEp->num, mEp->dir); |
aa69a809 | 535 | |
ca9cfea0 | 536 | while (!list_empty(&mEp->qh.queue)) { |
aa69a809 DL |
537 | |
538 | /* pop oldest request */ | |
539 | struct ci13xxx_req *mReq = \ | |
ca9cfea0 | 540 | list_entry(mEp->qh.queue.next, |
aa69a809 DL |
541 | struct ci13xxx_req, queue); |
542 | list_del_init(&mReq->queue); | |
543 | mReq->req.status = -ESHUTDOWN; | |
544 | ||
7c25a826 | 545 | if (mReq->req.complete != NULL) { |
aa69a809 DL |
546 | spin_unlock(mEp->lock); |
547 | mReq->req.complete(&mEp->ep, &mReq->req); | |
548 | spin_lock(mEp->lock); | |
549 | } | |
550 | } | |
551 | return 0; | |
552 | } | |
553 | ||
554 | /** | |
555 | * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts | |
556 | * @gadget: gadget | |
557 | * | |
558 | * This function returns an error code | |
aa69a809 DL |
559 | */ |
560 | static int _gadget_stop_activity(struct usb_gadget *gadget) | |
aa69a809 DL |
561 | { |
562 | struct usb_ep *ep; | |
26c696c6 | 563 | struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget); |
e2b61c1d | 564 | unsigned long flags; |
aa69a809 | 565 | |
26c696c6 RZ |
566 | spin_lock_irqsave(&ci->lock, flags); |
567 | ci->gadget.speed = USB_SPEED_UNKNOWN; | |
568 | ci->remote_wakeup = 0; | |
569 | ci->suspended = 0; | |
570 | spin_unlock_irqrestore(&ci->lock, flags); | |
e2b61c1d | 571 | |
aa69a809 DL |
572 | /* flush all endpoints */ |
573 | gadget_for_each_ep(ep, gadget) { | |
574 | usb_ep_fifo_flush(ep); | |
575 | } | |
26c696c6 RZ |
576 | usb_ep_fifo_flush(&ci->ep0out->ep); |
577 | usb_ep_fifo_flush(&ci->ep0in->ep); | |
aa69a809 | 578 | |
26c696c6 RZ |
579 | if (ci->driver) |
580 | ci->driver->disconnect(gadget); | |
aa69a809 DL |
581 | |
582 | /* make sure to disable all endpoints */ | |
583 | gadget_for_each_ep(ep, gadget) { | |
584 | usb_ep_disable(ep); | |
585 | } | |
aa69a809 | 586 | |
26c696c6 RZ |
587 | if (ci->status != NULL) { |
588 | usb_ep_free_request(&ci->ep0in->ep, ci->status); | |
589 | ci->status = NULL; | |
aa69a809 DL |
590 | } |
591 | ||
aa69a809 DL |
592 | return 0; |
593 | } | |
594 | ||
595 | /****************************************************************************** | |
596 | * ISR block | |
597 | *****************************************************************************/ | |
598 | /** | |
599 | * isr_reset_handler: USB reset interrupt handler | |
26c696c6 | 600 | * @ci: UDC device |
aa69a809 DL |
601 | * |
602 | * This function resets USB engine after a bus reset occurred | |
603 | */ | |
26c696c6 RZ |
604 | static void isr_reset_handler(struct ci13xxx *ci) |
605 | __releases(ci->lock) | |
606 | __acquires(ci->lock) | |
aa69a809 | 607 | { |
aa69a809 DL |
608 | int retval; |
609 | ||
aa69a809 DL |
610 | dbg_event(0xFF, "BUS RST", 0); |
611 | ||
26c696c6 RZ |
612 | spin_unlock(&ci->lock); |
613 | retval = _gadget_stop_activity(&ci->gadget); | |
aa69a809 DL |
614 | if (retval) |
615 | goto done; | |
616 | ||
26c696c6 | 617 | retval = hw_usb_reset(ci); |
aa69a809 DL |
618 | if (retval) |
619 | goto done; | |
620 | ||
26c696c6 RZ |
621 | ci->status = usb_ep_alloc_request(&ci->ep0in->ep, GFP_ATOMIC); |
622 | if (ci->status == NULL) | |
ac1aa6a2 | 623 | retval = -ENOMEM; |
ca9cfea0 | 624 | |
b9322252 | 625 | done: |
26c696c6 | 626 | spin_lock(&ci->lock); |
aa69a809 | 627 | |
aa69a809 | 628 | if (retval) |
26c696c6 | 629 | dev_err(ci->dev, "error: %i\n", retval); |
aa69a809 DL |
630 | } |
631 | ||
632 | /** | |
633 | * isr_get_status_complete: get_status request complete function | |
634 | * @ep: endpoint | |
635 | * @req: request handled | |
636 | * | |
637 | * Caller must release lock | |
638 | */ | |
639 | static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req) | |
640 | { | |
0f089094 | 641 | if (ep == NULL || req == NULL) |
aa69a809 | 642 | return; |
aa69a809 DL |
643 | |
644 | kfree(req->buf); | |
645 | usb_ep_free_request(ep, req); | |
646 | } | |
647 | ||
648 | /** | |
649 | * isr_get_status_response: get_status request response | |
26c696c6 | 650 | * @ci: ci struct |
aa69a809 DL |
651 | * @setup: setup request packet |
652 | * | |
653 | * This function returns an error code | |
654 | */ | |
26c696c6 | 655 | static int isr_get_status_response(struct ci13xxx *ci, |
aa69a809 DL |
656 | struct usb_ctrlrequest *setup) |
657 | __releases(mEp->lock) | |
658 | __acquires(mEp->lock) | |
659 | { | |
26c696c6 | 660 | struct ci13xxx_ep *mEp = ci->ep0in; |
aa69a809 DL |
661 | struct usb_request *req = NULL; |
662 | gfp_t gfp_flags = GFP_ATOMIC; | |
663 | int dir, num, retval; | |
664 | ||
aa69a809 DL |
665 | if (mEp == NULL || setup == NULL) |
666 | return -EINVAL; | |
667 | ||
668 | spin_unlock(mEp->lock); | |
669 | req = usb_ep_alloc_request(&mEp->ep, gfp_flags); | |
670 | spin_lock(mEp->lock); | |
671 | if (req == NULL) | |
672 | return -ENOMEM; | |
673 | ||
674 | req->complete = isr_get_status_complete; | |
675 | req->length = 2; | |
676 | req->buf = kzalloc(req->length, gfp_flags); | |
677 | if (req->buf == NULL) { | |
678 | retval = -ENOMEM; | |
679 | goto err_free_req; | |
680 | } | |
681 | ||
682 | if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) { | |
e2b61c1d | 683 | /* Assume that device is bus powered for now. */ |
26c696c6 | 684 | *(u16 *)req->buf = ci->remote_wakeup << 1; |
aa69a809 DL |
685 | retval = 0; |
686 | } else if ((setup->bRequestType & USB_RECIP_MASK) \ | |
687 | == USB_RECIP_ENDPOINT) { | |
688 | dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ? | |
689 | TX : RX; | |
690 | num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK; | |
26c696c6 | 691 | *(u16 *)req->buf = hw_ep_get_halt(ci, num, dir); |
aa69a809 DL |
692 | } |
693 | /* else do nothing; reserved for future use */ | |
694 | ||
695 | spin_unlock(mEp->lock); | |
696 | retval = usb_ep_queue(&mEp->ep, req, gfp_flags); | |
697 | spin_lock(mEp->lock); | |
698 | if (retval) | |
699 | goto err_free_buf; | |
700 | ||
701 | return 0; | |
702 | ||
703 | err_free_buf: | |
704 | kfree(req->buf); | |
705 | err_free_req: | |
706 | spin_unlock(mEp->lock); | |
707 | usb_ep_free_request(&mEp->ep, req); | |
708 | spin_lock(mEp->lock); | |
709 | return retval; | |
710 | } | |
711 | ||
541cace8 PK |
712 | /** |
713 | * isr_setup_status_complete: setup_status request complete function | |
714 | * @ep: endpoint | |
715 | * @req: request handled | |
716 | * | |
717 | * Caller must release lock. Put the port in test mode if test mode | |
718 | * feature is selected. | |
719 | */ | |
720 | static void | |
721 | isr_setup_status_complete(struct usb_ep *ep, struct usb_request *req) | |
722 | { | |
26c696c6 | 723 | struct ci13xxx *ci = req->context; |
541cace8 PK |
724 | unsigned long flags; |
725 | ||
26c696c6 RZ |
726 | if (ci->setaddr) { |
727 | hw_usb_set_address(ci, ci->address); | |
728 | ci->setaddr = false; | |
ef15e549 AS |
729 | } |
730 | ||
26c696c6 RZ |
731 | spin_lock_irqsave(&ci->lock, flags); |
732 | if (ci->test_mode) | |
733 | hw_port_test_set(ci, ci->test_mode); | |
734 | spin_unlock_irqrestore(&ci->lock, flags); | |
541cace8 PK |
735 | } |
736 | ||
aa69a809 DL |
737 | /** |
738 | * isr_setup_status_phase: queues the status phase of a setup transation | |
26c696c6 | 739 | * @ci: ci struct |
aa69a809 DL |
740 | * |
741 | * This function returns an error code | |
742 | */ | |
26c696c6 | 743 | static int isr_setup_status_phase(struct ci13xxx *ci) |
aa69a809 DL |
744 | __releases(mEp->lock) |
745 | __acquires(mEp->lock) | |
746 | { | |
747 | int retval; | |
ca9cfea0 | 748 | struct ci13xxx_ep *mEp; |
aa69a809 | 749 | |
26c696c6 RZ |
750 | mEp = (ci->ep0_dir == TX) ? ci->ep0out : ci->ep0in; |
751 | ci->status->context = ci; | |
752 | ci->status->complete = isr_setup_status_complete; | |
aa69a809 DL |
753 | |
754 | spin_unlock(mEp->lock); | |
26c696c6 | 755 | retval = usb_ep_queue(&mEp->ep, ci->status, GFP_ATOMIC); |
aa69a809 DL |
756 | spin_lock(mEp->lock); |
757 | ||
758 | return retval; | |
759 | } | |
760 | ||
761 | /** | |
762 | * isr_tr_complete_low: transaction complete low level handler | |
763 | * @mEp: endpoint | |
764 | * | |
765 | * This function returns an error code | |
766 | * Caller must hold lock | |
767 | */ | |
768 | static int isr_tr_complete_low(struct ci13xxx_ep *mEp) | |
769 | __releases(mEp->lock) | |
770 | __acquires(mEp->lock) | |
771 | { | |
0e6ca199 | 772 | struct ci13xxx_req *mReq, *mReqTemp; |
76cd9cfb | 773 | struct ci13xxx_ep *mEpTemp = mEp; |
986b11b8 | 774 | int uninitialized_var(retval); |
aa69a809 | 775 | |
ca9cfea0 | 776 | if (list_empty(&mEp->qh.queue)) |
aa69a809 DL |
777 | return -EINVAL; |
778 | ||
0e6ca199 PK |
779 | list_for_each_entry_safe(mReq, mReqTemp, &mEp->qh.queue, |
780 | queue) { | |
781 | retval = _hardware_dequeue(mEp, mReq); | |
782 | if (retval < 0) | |
783 | break; | |
784 | list_del_init(&mReq->queue); | |
785 | dbg_done(_usb_addr(mEp), mReq->ptr->token, retval); | |
786 | if (mReq->req.complete != NULL) { | |
787 | spin_unlock(mEp->lock); | |
76cd9cfb PK |
788 | if ((mEp->type == USB_ENDPOINT_XFER_CONTROL) && |
789 | mReq->req.length) | |
26c696c6 | 790 | mEpTemp = mEp->ci->ep0in; |
76cd9cfb | 791 | mReq->req.complete(&mEpTemp->ep, &mReq->req); |
0e6ca199 PK |
792 | spin_lock(mEp->lock); |
793 | } | |
d9bb9c18 AL |
794 | } |
795 | ||
ef907482 | 796 | if (retval == -EBUSY) |
0e6ca199 PK |
797 | retval = 0; |
798 | if (retval < 0) | |
799 | dbg_event(_usb_addr(mEp), "DONE", retval); | |
aa69a809 | 800 | |
aa69a809 DL |
801 | return retval; |
802 | } | |
803 | ||
804 | /** | |
805 | * isr_tr_complete_handler: transaction complete interrupt handler | |
26c696c6 | 806 | * @ci: UDC descriptor |
aa69a809 DL |
807 | * |
808 | * This function handles traffic events | |
809 | */ | |
26c696c6 RZ |
810 | static void isr_tr_complete_handler(struct ci13xxx *ci) |
811 | __releases(ci->lock) | |
812 | __acquires(ci->lock) | |
aa69a809 DL |
813 | { |
814 | unsigned i; | |
541cace8 | 815 | u8 tmode = 0; |
aa69a809 | 816 | |
26c696c6 RZ |
817 | for (i = 0; i < ci->hw_ep_max; i++) { |
818 | struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i]; | |
4c5212b7 | 819 | int type, num, dir, err = -EINVAL; |
aa69a809 DL |
820 | struct usb_ctrlrequest req; |
821 | ||
31fb6014 | 822 | if (mEp->ep.desc == NULL) |
aa69a809 DL |
823 | continue; /* not configured */ |
824 | ||
26c696c6 | 825 | if (hw_test_and_clear_complete(ci, i)) { |
aa69a809 DL |
826 | err = isr_tr_complete_low(mEp); |
827 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) { | |
828 | if (err > 0) /* needs status phase */ | |
26c696c6 | 829 | err = isr_setup_status_phase(ci); |
aa69a809 DL |
830 | if (err < 0) { |
831 | dbg_event(_usb_addr(mEp), | |
832 | "ERROR", err); | |
26c696c6 | 833 | spin_unlock(&ci->lock); |
aa69a809 | 834 | if (usb_ep_set_halt(&mEp->ep)) |
26c696c6 | 835 | dev_err(ci->dev, |
0917ba84 | 836 | "error: ep_set_halt\n"); |
26c696c6 | 837 | spin_lock(&ci->lock); |
aa69a809 DL |
838 | } |
839 | } | |
840 | } | |
841 | ||
842 | if (mEp->type != USB_ENDPOINT_XFER_CONTROL || | |
26c696c6 | 843 | !hw_test_and_clear_setup_status(ci, i)) |
aa69a809 DL |
844 | continue; |
845 | ||
846 | if (i != 0) { | |
26c696c6 | 847 | dev_warn(ci->dev, "ctrl traffic at endpoint %d\n", i); |
aa69a809 DL |
848 | continue; |
849 | } | |
850 | ||
ca9cfea0 PK |
851 | /* |
852 | * Flush data and handshake transactions of previous | |
853 | * setup packet. | |
854 | */ | |
26c696c6 RZ |
855 | _ep_nuke(ci->ep0out); |
856 | _ep_nuke(ci->ep0in); | |
ca9cfea0 | 857 | |
aa69a809 DL |
858 | /* read_setup_packet */ |
859 | do { | |
26c696c6 | 860 | hw_test_and_set_setup_guard(ci); |
ca9cfea0 | 861 | memcpy(&req, &mEp->qh.ptr->setup, sizeof(req)); |
26c696c6 | 862 | } while (!hw_test_and_clear_setup_guard(ci)); |
aa69a809 DL |
863 | |
864 | type = req.bRequestType; | |
865 | ||
26c696c6 | 866 | ci->ep0_dir = (type & USB_DIR_IN) ? TX : RX; |
aa69a809 DL |
867 | |
868 | dbg_setup(_usb_addr(mEp), &req); | |
869 | ||
870 | switch (req.bRequest) { | |
871 | case USB_REQ_CLEAR_FEATURE: | |
e2b61c1d PK |
872 | if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) && |
873 | le16_to_cpu(req.wValue) == | |
874 | USB_ENDPOINT_HALT) { | |
875 | if (req.wLength != 0) | |
876 | break; | |
877 | num = le16_to_cpu(req.wIndex); | |
4c5212b7 | 878 | dir = num & USB_ENDPOINT_DIR_MASK; |
e2b61c1d | 879 | num &= USB_ENDPOINT_NUMBER_MASK; |
4c5212b7 | 880 | if (dir) /* TX */ |
26c696c6 RZ |
881 | num += ci->hw_ep_max/2; |
882 | if (!ci->ci13xxx_ep[num].wedge) { | |
883 | spin_unlock(&ci->lock); | |
e2b61c1d | 884 | err = usb_ep_clear_halt( |
26c696c6 RZ |
885 | &ci->ci13xxx_ep[num].ep); |
886 | spin_lock(&ci->lock); | |
e2b61c1d PK |
887 | if (err) |
888 | break; | |
889 | } | |
26c696c6 | 890 | err = isr_setup_status_phase(ci); |
e2b61c1d PK |
891 | } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE) && |
892 | le16_to_cpu(req.wValue) == | |
893 | USB_DEVICE_REMOTE_WAKEUP) { | |
894 | if (req.wLength != 0) | |
aa69a809 | 895 | break; |
26c696c6 RZ |
896 | ci->remote_wakeup = 0; |
897 | err = isr_setup_status_phase(ci); | |
e2b61c1d PK |
898 | } else { |
899 | goto delegate; | |
aa69a809 | 900 | } |
aa69a809 DL |
901 | break; |
902 | case USB_REQ_GET_STATUS: | |
903 | if (type != (USB_DIR_IN|USB_RECIP_DEVICE) && | |
904 | type != (USB_DIR_IN|USB_RECIP_ENDPOINT) && | |
905 | type != (USB_DIR_IN|USB_RECIP_INTERFACE)) | |
906 | goto delegate; | |
907 | if (le16_to_cpu(req.wLength) != 2 || | |
908 | le16_to_cpu(req.wValue) != 0) | |
909 | break; | |
26c696c6 | 910 | err = isr_get_status_response(ci, &req); |
aa69a809 DL |
911 | break; |
912 | case USB_REQ_SET_ADDRESS: | |
913 | if (type != (USB_DIR_OUT|USB_RECIP_DEVICE)) | |
914 | goto delegate; | |
915 | if (le16_to_cpu(req.wLength) != 0 || | |
916 | le16_to_cpu(req.wIndex) != 0) | |
917 | break; | |
26c696c6 RZ |
918 | ci->address = (u8)le16_to_cpu(req.wValue); |
919 | ci->setaddr = true; | |
920 | err = isr_setup_status_phase(ci); | |
aa69a809 DL |
921 | break; |
922 | case USB_REQ_SET_FEATURE: | |
e2b61c1d PK |
923 | if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) && |
924 | le16_to_cpu(req.wValue) == | |
925 | USB_ENDPOINT_HALT) { | |
926 | if (req.wLength != 0) | |
927 | break; | |
928 | num = le16_to_cpu(req.wIndex); | |
4c5212b7 | 929 | dir = num & USB_ENDPOINT_DIR_MASK; |
e2b61c1d | 930 | num &= USB_ENDPOINT_NUMBER_MASK; |
4c5212b7 | 931 | if (dir) /* TX */ |
26c696c6 | 932 | num += ci->hw_ep_max/2; |
aa69a809 | 933 | |
26c696c6 RZ |
934 | spin_unlock(&ci->lock); |
935 | err = usb_ep_set_halt(&ci->ci13xxx_ep[num].ep); | |
936 | spin_lock(&ci->lock); | |
e2b61c1d | 937 | if (!err) |
26c696c6 | 938 | isr_setup_status_phase(ci); |
541cace8 | 939 | } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE)) { |
e2b61c1d PK |
940 | if (req.wLength != 0) |
941 | break; | |
541cace8 PK |
942 | switch (le16_to_cpu(req.wValue)) { |
943 | case USB_DEVICE_REMOTE_WAKEUP: | |
26c696c6 RZ |
944 | ci->remote_wakeup = 1; |
945 | err = isr_setup_status_phase(ci); | |
541cace8 PK |
946 | break; |
947 | case USB_DEVICE_TEST_MODE: | |
948 | tmode = le16_to_cpu(req.wIndex) >> 8; | |
949 | switch (tmode) { | |
950 | case TEST_J: | |
951 | case TEST_K: | |
952 | case TEST_SE0_NAK: | |
953 | case TEST_PACKET: | |
954 | case TEST_FORCE_EN: | |
26c696c6 | 955 | ci->test_mode = tmode; |
541cace8 | 956 | err = isr_setup_status_phase( |
26c696c6 | 957 | ci); |
541cace8 PK |
958 | break; |
959 | default: | |
960 | break; | |
961 | } | |
962 | default: | |
963 | goto delegate; | |
964 | } | |
e2b61c1d PK |
965 | } else { |
966 | goto delegate; | |
967 | } | |
aa69a809 DL |
968 | break; |
969 | default: | |
970 | delegate: | |
971 | if (req.wLength == 0) /* no data phase */ | |
26c696c6 | 972 | ci->ep0_dir = TX; |
aa69a809 | 973 | |
26c696c6 RZ |
974 | spin_unlock(&ci->lock); |
975 | err = ci->driver->setup(&ci->gadget, &req); | |
976 | spin_lock(&ci->lock); | |
aa69a809 DL |
977 | break; |
978 | } | |
979 | ||
980 | if (err < 0) { | |
981 | dbg_event(_usb_addr(mEp), "ERROR", err); | |
982 | ||
26c696c6 | 983 | spin_unlock(&ci->lock); |
aa69a809 | 984 | if (usb_ep_set_halt(&mEp->ep)) |
26c696c6 RZ |
985 | dev_err(ci->dev, "error: ep_set_halt\n"); |
986 | spin_lock(&ci->lock); | |
aa69a809 DL |
987 | } |
988 | } | |
989 | } | |
990 | ||
991 | /****************************************************************************** | |
992 | * ENDPT block | |
993 | *****************************************************************************/ | |
994 | /** | |
995 | * ep_enable: configure endpoint, making it usable | |
996 | * | |
997 | * Check usb_ep_enable() at "usb_gadget.h" for details | |
998 | */ | |
999 | static int ep_enable(struct usb_ep *ep, | |
1000 | const struct usb_endpoint_descriptor *desc) | |
1001 | { | |
1002 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
ca9cfea0 | 1003 | int retval = 0; |
aa69a809 DL |
1004 | unsigned long flags; |
1005 | ||
aa69a809 DL |
1006 | if (ep == NULL || desc == NULL) |
1007 | return -EINVAL; | |
1008 | ||
1009 | spin_lock_irqsave(mEp->lock, flags); | |
1010 | ||
1011 | /* only internal SW should enable ctrl endpts */ | |
1012 | ||
31fb6014 | 1013 | mEp->ep.desc = desc; |
aa69a809 | 1014 | |
ca9cfea0 | 1015 | if (!list_empty(&mEp->qh.queue)) |
26c696c6 | 1016 | dev_warn(mEp->ci->dev, "enabling a non-empty endpoint!\n"); |
aa69a809 | 1017 | |
15739bb5 MK |
1018 | mEp->dir = usb_endpoint_dir_in(desc) ? TX : RX; |
1019 | mEp->num = usb_endpoint_num(desc); | |
1020 | mEp->type = usb_endpoint_type(desc); | |
aa69a809 | 1021 | |
29cc8897 | 1022 | mEp->ep.maxpacket = usb_endpoint_maxp(desc); |
aa69a809 | 1023 | |
ca9cfea0 | 1024 | dbg_event(_usb_addr(mEp), "ENABLE", 0); |
aa69a809 | 1025 | |
ca9cfea0 | 1026 | mEp->qh.ptr->cap = 0; |
aa69a809 | 1027 | |
ca9cfea0 PK |
1028 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) |
1029 | mEp->qh.ptr->cap |= QH_IOS; | |
1030 | else if (mEp->type == USB_ENDPOINT_XFER_ISOC) | |
1031 | mEp->qh.ptr->cap &= ~QH_MULT; | |
1032 | else | |
1033 | mEp->qh.ptr->cap &= ~QH_ZLT; | |
aa69a809 | 1034 | |
ca9cfea0 PK |
1035 | mEp->qh.ptr->cap |= |
1036 | (mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT; | |
1037 | mEp->qh.ptr->td.next |= TD_TERMINATE; /* needed? */ | |
aa69a809 | 1038 | |
ac1aa6a2 A |
1039 | /* |
1040 | * Enable endpoints in the HW other than ep0 as ep0 | |
1041 | * is always enabled | |
1042 | */ | |
1043 | if (mEp->num) | |
26c696c6 | 1044 | retval |= hw_ep_enable(mEp->ci, mEp->num, mEp->dir, mEp->type); |
aa69a809 DL |
1045 | |
1046 | spin_unlock_irqrestore(mEp->lock, flags); | |
1047 | return retval; | |
1048 | } | |
1049 | ||
1050 | /** | |
1051 | * ep_disable: endpoint is no longer usable | |
1052 | * | |
1053 | * Check usb_ep_disable() at "usb_gadget.h" for details | |
1054 | */ | |
1055 | static int ep_disable(struct usb_ep *ep) | |
1056 | { | |
1057 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1058 | int direction, retval = 0; | |
1059 | unsigned long flags; | |
1060 | ||
aa69a809 DL |
1061 | if (ep == NULL) |
1062 | return -EINVAL; | |
31fb6014 | 1063 | else if (mEp->ep.desc == NULL) |
aa69a809 DL |
1064 | return -EBUSY; |
1065 | ||
1066 | spin_lock_irqsave(mEp->lock, flags); | |
1067 | ||
1068 | /* only internal SW should disable ctrl endpts */ | |
1069 | ||
1070 | direction = mEp->dir; | |
1071 | do { | |
1072 | dbg_event(_usb_addr(mEp), "DISABLE", 0); | |
1073 | ||
1074 | retval |= _ep_nuke(mEp); | |
26c696c6 | 1075 | retval |= hw_ep_disable(mEp->ci, mEp->num, mEp->dir); |
aa69a809 DL |
1076 | |
1077 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) | |
1078 | mEp->dir = (mEp->dir == TX) ? RX : TX; | |
1079 | ||
1080 | } while (mEp->dir != direction); | |
1081 | ||
f9c56cdd | 1082 | mEp->ep.desc = NULL; |
aa69a809 DL |
1083 | |
1084 | spin_unlock_irqrestore(mEp->lock, flags); | |
1085 | return retval; | |
1086 | } | |
1087 | ||
1088 | /** | |
1089 | * ep_alloc_request: allocate a request object to use with this endpoint | |
1090 | * | |
1091 | * Check usb_ep_alloc_request() at "usb_gadget.h" for details | |
1092 | */ | |
1093 | static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) | |
1094 | { | |
1095 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1096 | struct ci13xxx_req *mReq = NULL; | |
aa69a809 | 1097 | |
0f089094 | 1098 | if (ep == NULL) |
aa69a809 | 1099 | return NULL; |
aa69a809 | 1100 | |
aa69a809 DL |
1101 | mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags); |
1102 | if (mReq != NULL) { | |
1103 | INIT_LIST_HEAD(&mReq->queue); | |
1104 | ||
1105 | mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags, | |
1106 | &mReq->dma); | |
1107 | if (mReq->ptr == NULL) { | |
1108 | kfree(mReq); | |
1109 | mReq = NULL; | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | dbg_event(_usb_addr(mEp), "ALLOC", mReq == NULL); | |
1114 | ||
aa69a809 DL |
1115 | return (mReq == NULL) ? NULL : &mReq->req; |
1116 | } | |
1117 | ||
1118 | /** | |
1119 | * ep_free_request: frees a request object | |
1120 | * | |
1121 | * Check usb_ep_free_request() at "usb_gadget.h" for details | |
1122 | */ | |
1123 | static void ep_free_request(struct usb_ep *ep, struct usb_request *req) | |
1124 | { | |
1125 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1126 | struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req); | |
1127 | unsigned long flags; | |
1128 | ||
aa69a809 | 1129 | if (ep == NULL || req == NULL) { |
aa69a809 DL |
1130 | return; |
1131 | } else if (!list_empty(&mReq->queue)) { | |
26c696c6 | 1132 | dev_err(mEp->ci->dev, "freeing queued request\n"); |
aa69a809 DL |
1133 | return; |
1134 | } | |
1135 | ||
1136 | spin_lock_irqsave(mEp->lock, flags); | |
1137 | ||
1138 | if (mReq->ptr) | |
1139 | dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma); | |
1140 | kfree(mReq); | |
1141 | ||
1142 | dbg_event(_usb_addr(mEp), "FREE", 0); | |
1143 | ||
1144 | spin_unlock_irqrestore(mEp->lock, flags); | |
1145 | } | |
1146 | ||
1147 | /** | |
1148 | * ep_queue: queues (submits) an I/O request to an endpoint | |
1149 | * | |
1150 | * Check usb_ep_queue()* at usb_gadget.h" for details | |
1151 | */ | |
1152 | static int ep_queue(struct usb_ep *ep, struct usb_request *req, | |
1153 | gfp_t __maybe_unused gfp_flags) | |
1154 | { | |
1155 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1156 | struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req); | |
26c696c6 | 1157 | struct ci13xxx *ci = mEp->ci; |
aa69a809 DL |
1158 | int retval = 0; |
1159 | unsigned long flags; | |
1160 | ||
31fb6014 | 1161 | if (ep == NULL || req == NULL || mEp->ep.desc == NULL) |
aa69a809 DL |
1162 | return -EINVAL; |
1163 | ||
1164 | spin_lock_irqsave(mEp->lock, flags); | |
1165 | ||
76cd9cfb PK |
1166 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) { |
1167 | if (req->length) | |
26c696c6 RZ |
1168 | mEp = (ci->ep0_dir == RX) ? |
1169 | ci->ep0out : ci->ep0in; | |
76cd9cfb PK |
1170 | if (!list_empty(&mEp->qh.queue)) { |
1171 | _ep_nuke(mEp); | |
1172 | retval = -EOVERFLOW; | |
26c696c6 | 1173 | dev_warn(mEp->ci->dev, "endpoint ctrl %X nuked\n", |
0f089094 | 1174 | _usb_addr(mEp)); |
76cd9cfb | 1175 | } |
aa69a809 DL |
1176 | } |
1177 | ||
1178 | /* first nuke then test link, e.g. previous status has not sent */ | |
1179 | if (!list_empty(&mReq->queue)) { | |
1180 | retval = -EBUSY; | |
26c696c6 | 1181 | dev_err(mEp->ci->dev, "request already in queue\n"); |
aa69a809 DL |
1182 | goto done; |
1183 | } | |
1184 | ||
1155a7b8 AS |
1185 | if (req->length > 4 * CI13XXX_PAGE_SIZE) { |
1186 | req->length = 4 * CI13XXX_PAGE_SIZE; | |
aa69a809 | 1187 | retval = -EMSGSIZE; |
26c696c6 | 1188 | dev_warn(mEp->ci->dev, "request length truncated\n"); |
aa69a809 DL |
1189 | } |
1190 | ||
1191 | dbg_queue(_usb_addr(mEp), req, retval); | |
1192 | ||
1193 | /* push request */ | |
1194 | mReq->req.status = -EINPROGRESS; | |
1195 | mReq->req.actual = 0; | |
aa69a809 | 1196 | |
0e6ca199 | 1197 | retval = _hardware_enqueue(mEp, mReq); |
d9bb9c18 AL |
1198 | |
1199 | if (retval == -EALREADY) { | |
aa69a809 DL |
1200 | dbg_event(_usb_addr(mEp), "QUEUE", retval); |
1201 | retval = 0; | |
1202 | } | |
0e6ca199 PK |
1203 | if (!retval) |
1204 | list_add_tail(&mReq->queue, &mEp->qh.queue); | |
aa69a809 DL |
1205 | |
1206 | done: | |
1207 | spin_unlock_irqrestore(mEp->lock, flags); | |
1208 | return retval; | |
1209 | } | |
1210 | ||
1211 | /** | |
1212 | * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint | |
1213 | * | |
1214 | * Check usb_ep_dequeue() at "usb_gadget.h" for details | |
1215 | */ | |
1216 | static int ep_dequeue(struct usb_ep *ep, struct usb_request *req) | |
1217 | { | |
1218 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1219 | struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req); | |
1220 | unsigned long flags; | |
1221 | ||
0e6ca199 | 1222 | if (ep == NULL || req == NULL || mReq->req.status != -EALREADY || |
31fb6014 | 1223 | mEp->ep.desc == NULL || list_empty(&mReq->queue) || |
0e6ca199 | 1224 | list_empty(&mEp->qh.queue)) |
aa69a809 DL |
1225 | return -EINVAL; |
1226 | ||
1227 | spin_lock_irqsave(mEp->lock, flags); | |
1228 | ||
1229 | dbg_event(_usb_addr(mEp), "DEQUEUE", 0); | |
1230 | ||
26c696c6 | 1231 | hw_ep_flush(mEp->ci, mEp->num, mEp->dir); |
aa69a809 DL |
1232 | |
1233 | /* pop request */ | |
1234 | list_del_init(&mReq->queue); | |
5e0aa49e | 1235 | |
26c696c6 | 1236 | usb_gadget_unmap_request(&mEp->ci->gadget, req, mEp->dir); |
5e0aa49e | 1237 | |
aa69a809 DL |
1238 | req->status = -ECONNRESET; |
1239 | ||
7c25a826 | 1240 | if (mReq->req.complete != NULL) { |
aa69a809 DL |
1241 | spin_unlock(mEp->lock); |
1242 | mReq->req.complete(&mEp->ep, &mReq->req); | |
1243 | spin_lock(mEp->lock); | |
1244 | } | |
1245 | ||
1246 | spin_unlock_irqrestore(mEp->lock, flags); | |
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | /** | |
1251 | * ep_set_halt: sets the endpoint halt feature | |
1252 | * | |
1253 | * Check usb_ep_set_halt() at "usb_gadget.h" for details | |
1254 | */ | |
1255 | static int ep_set_halt(struct usb_ep *ep, int value) | |
1256 | { | |
1257 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1258 | int direction, retval = 0; | |
1259 | unsigned long flags; | |
1260 | ||
31fb6014 | 1261 | if (ep == NULL || mEp->ep.desc == NULL) |
aa69a809 DL |
1262 | return -EINVAL; |
1263 | ||
1264 | spin_lock_irqsave(mEp->lock, flags); | |
1265 | ||
1266 | #ifndef STALL_IN | |
1267 | /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */ | |
1268 | if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX && | |
ca9cfea0 | 1269 | !list_empty(&mEp->qh.queue)) { |
aa69a809 DL |
1270 | spin_unlock_irqrestore(mEp->lock, flags); |
1271 | return -EAGAIN; | |
1272 | } | |
1273 | #endif | |
1274 | ||
1275 | direction = mEp->dir; | |
1276 | do { | |
1277 | dbg_event(_usb_addr(mEp), "HALT", value); | |
26c696c6 | 1278 | retval |= hw_ep_set_halt(mEp->ci, mEp->num, mEp->dir, value); |
aa69a809 DL |
1279 | |
1280 | if (!value) | |
1281 | mEp->wedge = 0; | |
1282 | ||
1283 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) | |
1284 | mEp->dir = (mEp->dir == TX) ? RX : TX; | |
1285 | ||
1286 | } while (mEp->dir != direction); | |
1287 | ||
1288 | spin_unlock_irqrestore(mEp->lock, flags); | |
1289 | return retval; | |
1290 | } | |
1291 | ||
1292 | /** | |
1293 | * ep_set_wedge: sets the halt feature and ignores clear requests | |
1294 | * | |
1295 | * Check usb_ep_set_wedge() at "usb_gadget.h" for details | |
1296 | */ | |
1297 | static int ep_set_wedge(struct usb_ep *ep) | |
1298 | { | |
1299 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1300 | unsigned long flags; | |
1301 | ||
31fb6014 | 1302 | if (ep == NULL || mEp->ep.desc == NULL) |
aa69a809 DL |
1303 | return -EINVAL; |
1304 | ||
1305 | spin_lock_irqsave(mEp->lock, flags); | |
1306 | ||
1307 | dbg_event(_usb_addr(mEp), "WEDGE", 0); | |
1308 | mEp->wedge = 1; | |
1309 | ||
1310 | spin_unlock_irqrestore(mEp->lock, flags); | |
1311 | ||
1312 | return usb_ep_set_halt(ep); | |
1313 | } | |
1314 | ||
1315 | /** | |
1316 | * ep_fifo_flush: flushes contents of a fifo | |
1317 | * | |
1318 | * Check usb_ep_fifo_flush() at "usb_gadget.h" for details | |
1319 | */ | |
1320 | static void ep_fifo_flush(struct usb_ep *ep) | |
1321 | { | |
1322 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1323 | unsigned long flags; | |
1324 | ||
aa69a809 | 1325 | if (ep == NULL) { |
26c696c6 | 1326 | dev_err(mEp->ci->dev, "%02X: -EINVAL\n", _usb_addr(mEp)); |
aa69a809 DL |
1327 | return; |
1328 | } | |
1329 | ||
1330 | spin_lock_irqsave(mEp->lock, flags); | |
1331 | ||
1332 | dbg_event(_usb_addr(mEp), "FFLUSH", 0); | |
26c696c6 | 1333 | hw_ep_flush(mEp->ci, mEp->num, mEp->dir); |
aa69a809 DL |
1334 | |
1335 | spin_unlock_irqrestore(mEp->lock, flags); | |
1336 | } | |
1337 | ||
1338 | /** | |
1339 | * Endpoint-specific part of the API to the USB controller hardware | |
1340 | * Check "usb_gadget.h" for details | |
1341 | */ | |
1342 | static const struct usb_ep_ops usb_ep_ops = { | |
1343 | .enable = ep_enable, | |
1344 | .disable = ep_disable, | |
1345 | .alloc_request = ep_alloc_request, | |
1346 | .free_request = ep_free_request, | |
1347 | .queue = ep_queue, | |
1348 | .dequeue = ep_dequeue, | |
1349 | .set_halt = ep_set_halt, | |
1350 | .set_wedge = ep_set_wedge, | |
1351 | .fifo_flush = ep_fifo_flush, | |
1352 | }; | |
1353 | ||
1354 | /****************************************************************************** | |
1355 | * GADGET block | |
1356 | *****************************************************************************/ | |
f01ef574 PK |
1357 | static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active) |
1358 | { | |
26c696c6 | 1359 | struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); |
f01ef574 PK |
1360 | unsigned long flags; |
1361 | int gadget_ready = 0; | |
1362 | ||
26c696c6 | 1363 | if (!(ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS)) |
f01ef574 PK |
1364 | return -EOPNOTSUPP; |
1365 | ||
26c696c6 RZ |
1366 | spin_lock_irqsave(&ci->lock, flags); |
1367 | ci->vbus_active = is_active; | |
1368 | if (ci->driver) | |
f01ef574 | 1369 | gadget_ready = 1; |
26c696c6 | 1370 | spin_unlock_irqrestore(&ci->lock, flags); |
f01ef574 PK |
1371 | |
1372 | if (gadget_ready) { | |
1373 | if (is_active) { | |
c036019e | 1374 | pm_runtime_get_sync(&_gadget->dev); |
26c696c6 RZ |
1375 | hw_device_reset(ci, USBMODE_CM_DC); |
1376 | hw_device_state(ci, ci->ep0out->qh.dma); | |
f01ef574 | 1377 | } else { |
26c696c6 RZ |
1378 | hw_device_state(ci, 0); |
1379 | if (ci->platdata->notify_event) | |
1380 | ci->platdata->notify_event(ci, | |
f01ef574 | 1381 | CI13XXX_CONTROLLER_STOPPED_EVENT); |
26c696c6 | 1382 | _gadget_stop_activity(&ci->gadget); |
c036019e | 1383 | pm_runtime_put_sync(&_gadget->dev); |
f01ef574 PK |
1384 | } |
1385 | } | |
1386 | ||
1387 | return 0; | |
1388 | } | |
1389 | ||
e2b61c1d PK |
1390 | static int ci13xxx_wakeup(struct usb_gadget *_gadget) |
1391 | { | |
26c696c6 | 1392 | struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); |
e2b61c1d PK |
1393 | unsigned long flags; |
1394 | int ret = 0; | |
1395 | ||
26c696c6 RZ |
1396 | spin_lock_irqsave(&ci->lock, flags); |
1397 | if (!ci->remote_wakeup) { | |
e2b61c1d | 1398 | ret = -EOPNOTSUPP; |
e2b61c1d PK |
1399 | goto out; |
1400 | } | |
26c696c6 | 1401 | if (!hw_read(ci, OP_PORTSC, PORTSC_SUSP)) { |
e2b61c1d | 1402 | ret = -EINVAL; |
e2b61c1d PK |
1403 | goto out; |
1404 | } | |
26c696c6 | 1405 | hw_write(ci, OP_PORTSC, PORTSC_FPR, PORTSC_FPR); |
e2b61c1d | 1406 | out: |
26c696c6 | 1407 | spin_unlock_irqrestore(&ci->lock, flags); |
e2b61c1d PK |
1408 | return ret; |
1409 | } | |
1410 | ||
d860852e PK |
1411 | static int ci13xxx_vbus_draw(struct usb_gadget *_gadget, unsigned mA) |
1412 | { | |
26c696c6 | 1413 | struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); |
d860852e | 1414 | |
26c696c6 RZ |
1415 | if (ci->transceiver) |
1416 | return usb_phy_set_power(ci->transceiver, mA); | |
d860852e PK |
1417 | return -ENOTSUPP; |
1418 | } | |
1419 | ||
c0a48e6c MG |
1420 | /* Change Data+ pullup status |
1421 | * this func is used by usb_gadget_connect/disconnet | |
1422 | */ | |
1423 | static int ci13xxx_pullup(struct usb_gadget *_gadget, int is_on) | |
1424 | { | |
1425 | struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); | |
1426 | ||
1427 | if (is_on) | |
1428 | hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS); | |
1429 | else | |
1430 | hw_write(ci, OP_USBCMD, USBCMD_RS, 0); | |
1431 | ||
1432 | return 0; | |
1433 | } | |
1434 | ||
1f339d84 AS |
1435 | static int ci13xxx_start(struct usb_gadget *gadget, |
1436 | struct usb_gadget_driver *driver); | |
1437 | static int ci13xxx_stop(struct usb_gadget *gadget, | |
1438 | struct usb_gadget_driver *driver); | |
aa69a809 DL |
1439 | /** |
1440 | * Device operations part of the API to the USB controller hardware, | |
1441 | * which don't involve endpoints (or i/o) | |
1442 | * Check "usb_gadget.h" for details | |
1443 | */ | |
f01ef574 PK |
1444 | static const struct usb_gadget_ops usb_gadget_ops = { |
1445 | .vbus_session = ci13xxx_vbus_session, | |
e2b61c1d | 1446 | .wakeup = ci13xxx_wakeup, |
c0a48e6c | 1447 | .pullup = ci13xxx_pullup, |
d860852e | 1448 | .vbus_draw = ci13xxx_vbus_draw, |
1f339d84 AS |
1449 | .udc_start = ci13xxx_start, |
1450 | .udc_stop = ci13xxx_stop, | |
f01ef574 | 1451 | }; |
aa69a809 | 1452 | |
26c696c6 | 1453 | static int init_eps(struct ci13xxx *ci) |
aa69a809 | 1454 | { |
790c2d52 | 1455 | int retval = 0, i, j; |
aa69a809 | 1456 | |
26c696c6 | 1457 | for (i = 0; i < ci->hw_ep_max/2; i++) |
ca9cfea0 | 1458 | for (j = RX; j <= TX; j++) { |
26c696c6 RZ |
1459 | int k = i + j * ci->hw_ep_max/2; |
1460 | struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[k]; | |
aa69a809 | 1461 | |
ca9cfea0 PK |
1462 | scnprintf(mEp->name, sizeof(mEp->name), "ep%i%s", i, |
1463 | (j == TX) ? "in" : "out"); | |
aa69a809 | 1464 | |
26c696c6 RZ |
1465 | mEp->ci = ci; |
1466 | mEp->lock = &ci->lock; | |
1467 | mEp->td_pool = ci->td_pool; | |
aa69a809 | 1468 | |
ca9cfea0 PK |
1469 | mEp->ep.name = mEp->name; |
1470 | mEp->ep.ops = &usb_ep_ops; | |
7f67c38b MG |
1471 | /* |
1472 | * for ep0: maxP defined in desc, for other | |
1473 | * eps, maxP is set by epautoconfig() called | |
1474 | * by gadget layer | |
1475 | */ | |
1476 | mEp->ep.maxpacket = (unsigned short)~0; | |
aa69a809 | 1477 | |
ca9cfea0 | 1478 | INIT_LIST_HEAD(&mEp->qh.queue); |
26c696c6 | 1479 | mEp->qh.ptr = dma_pool_alloc(ci->qh_pool, GFP_KERNEL, |
790c2d52 | 1480 | &mEp->qh.dma); |
ca9cfea0 | 1481 | if (mEp->qh.ptr == NULL) |
aa69a809 DL |
1482 | retval = -ENOMEM; |
1483 | else | |
ca9cfea0 PK |
1484 | memset(mEp->qh.ptr, 0, sizeof(*mEp->qh.ptr)); |
1485 | ||
d36ade60 AS |
1486 | /* |
1487 | * set up shorthands for ep0 out and in endpoints, | |
1488 | * don't add to gadget's ep_list | |
1489 | */ | |
1490 | if (i == 0) { | |
1491 | if (j == RX) | |
26c696c6 | 1492 | ci->ep0out = mEp; |
d36ade60 | 1493 | else |
26c696c6 | 1494 | ci->ep0in = mEp; |
d36ade60 | 1495 | |
7f67c38b | 1496 | mEp->ep.maxpacket = CTRL_PAYLOAD_MAX; |
ca9cfea0 | 1497 | continue; |
d36ade60 | 1498 | } |
ca9cfea0 | 1499 | |
26c696c6 | 1500 | list_add_tail(&mEp->ep.ep_list, &ci->gadget.ep_list); |
ca9cfea0 | 1501 | } |
790c2d52 AS |
1502 | |
1503 | return retval; | |
1504 | } | |
1505 | ||
1506 | /** | |
1507 | * ci13xxx_start: register a gadget driver | |
1f339d84 | 1508 | * @gadget: our gadget |
790c2d52 | 1509 | * @driver: the driver being registered |
790c2d52 | 1510 | * |
790c2d52 AS |
1511 | * Interrupts are enabled here. |
1512 | */ | |
1f339d84 AS |
1513 | static int ci13xxx_start(struct usb_gadget *gadget, |
1514 | struct usb_gadget_driver *driver) | |
790c2d52 | 1515 | { |
26c696c6 | 1516 | struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget); |
790c2d52 | 1517 | unsigned long flags; |
790c2d52 AS |
1518 | int retval = -ENOMEM; |
1519 | ||
1f339d84 | 1520 | if (driver->disconnect == NULL) |
790c2d52 | 1521 | return -EINVAL; |
790c2d52 | 1522 | |
790c2d52 | 1523 | |
26c696c6 RZ |
1524 | ci->ep0out->ep.desc = &ctrl_endpt_out_desc; |
1525 | retval = usb_ep_enable(&ci->ep0out->ep); | |
ac1aa6a2 A |
1526 | if (retval) |
1527 | return retval; | |
877c1f54 | 1528 | |
26c696c6 RZ |
1529 | ci->ep0in->ep.desc = &ctrl_endpt_in_desc; |
1530 | retval = usb_ep_enable(&ci->ep0in->ep); | |
ac1aa6a2 A |
1531 | if (retval) |
1532 | return retval; | |
26c696c6 RZ |
1533 | spin_lock_irqsave(&ci->lock, flags); |
1534 | ||
1535 | ci->driver = driver; | |
1536 | pm_runtime_get_sync(&ci->gadget.dev); | |
1537 | if (ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) { | |
1538 | if (ci->vbus_active) { | |
1539 | if (ci->platdata->flags & CI13XXX_REGS_SHARED) | |
1540 | hw_device_reset(ci, USBMODE_CM_DC); | |
f01ef574 | 1541 | } else { |
26c696c6 | 1542 | pm_runtime_put_sync(&ci->gadget.dev); |
f01ef574 PK |
1543 | goto done; |
1544 | } | |
1545 | } | |
1546 | ||
26c696c6 | 1547 | retval = hw_device_state(ci, ci->ep0out->qh.dma); |
c036019e | 1548 | if (retval) |
26c696c6 | 1549 | pm_runtime_put_sync(&ci->gadget.dev); |
aa69a809 DL |
1550 | |
1551 | done: | |
26c696c6 | 1552 | spin_unlock_irqrestore(&ci->lock, flags); |
aa69a809 DL |
1553 | return retval; |
1554 | } | |
aa69a809 DL |
1555 | |
1556 | /** | |
0f91349b | 1557 | * ci13xxx_stop: unregister a gadget driver |
aa69a809 | 1558 | */ |
1f339d84 AS |
1559 | static int ci13xxx_stop(struct usb_gadget *gadget, |
1560 | struct usb_gadget_driver *driver) | |
aa69a809 | 1561 | { |
26c696c6 | 1562 | struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget); |
1f339d84 | 1563 | unsigned long flags; |
aa69a809 | 1564 | |
26c696c6 | 1565 | spin_lock_irqsave(&ci->lock, flags); |
aa69a809 | 1566 | |
26c696c6 RZ |
1567 | if (!(ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) || |
1568 | ci->vbus_active) { | |
1569 | hw_device_state(ci, 0); | |
1570 | if (ci->platdata->notify_event) | |
1571 | ci->platdata->notify_event(ci, | |
f01ef574 | 1572 | CI13XXX_CONTROLLER_STOPPED_EVENT); |
26c696c6 RZ |
1573 | ci->driver = NULL; |
1574 | spin_unlock_irqrestore(&ci->lock, flags); | |
1575 | _gadget_stop_activity(&ci->gadget); | |
1576 | spin_lock_irqsave(&ci->lock, flags); | |
1577 | pm_runtime_put(&ci->gadget.dev); | |
f01ef574 | 1578 | } |
aa69a809 | 1579 | |
26c696c6 | 1580 | spin_unlock_irqrestore(&ci->lock, flags); |
aa69a809 | 1581 | |
aa69a809 DL |
1582 | return 0; |
1583 | } | |
aa69a809 DL |
1584 | |
1585 | /****************************************************************************** | |
1586 | * BUS block | |
1587 | *****************************************************************************/ | |
1588 | /** | |
26c696c6 | 1589 | * udc_irq: ci interrupt handler |
aa69a809 DL |
1590 | * |
1591 | * This function returns IRQ_HANDLED if the IRQ has been handled | |
1592 | * It locks access to registers | |
1593 | */ | |
26c696c6 | 1594 | static irqreturn_t udc_irq(struct ci13xxx *ci) |
aa69a809 | 1595 | { |
aa69a809 DL |
1596 | irqreturn_t retval; |
1597 | u32 intr; | |
1598 | ||
26c696c6 | 1599 | if (ci == NULL) |
aa69a809 | 1600 | return IRQ_HANDLED; |
aa69a809 | 1601 | |
26c696c6 | 1602 | spin_lock(&ci->lock); |
f01ef574 | 1603 | |
26c696c6 RZ |
1604 | if (ci->platdata->flags & CI13XXX_REGS_SHARED) { |
1605 | if (hw_read(ci, OP_USBMODE, USBMODE_CM) != | |
758fc986 | 1606 | USBMODE_CM_DC) { |
26c696c6 | 1607 | spin_unlock(&ci->lock); |
f01ef574 PK |
1608 | return IRQ_NONE; |
1609 | } | |
1610 | } | |
26c696c6 | 1611 | intr = hw_test_and_clear_intr_active(ci); |
e443b333 | 1612 | dbg_interrupt(intr); |
aa69a809 | 1613 | |
e443b333 | 1614 | if (intr) { |
aa69a809 | 1615 | /* order defines priority - do NOT change it */ |
e443b333 | 1616 | if (USBi_URI & intr) |
26c696c6 | 1617 | isr_reset_handler(ci); |
e443b333 | 1618 | |
aa69a809 | 1619 | if (USBi_PCI & intr) { |
26c696c6 | 1620 | ci->gadget.speed = hw_port_is_high_speed(ci) ? |
aa69a809 | 1621 | USB_SPEED_HIGH : USB_SPEED_FULL; |
26c696c6 RZ |
1622 | if (ci->suspended && ci->driver->resume) { |
1623 | spin_unlock(&ci->lock); | |
1624 | ci->driver->resume(&ci->gadget); | |
1625 | spin_lock(&ci->lock); | |
1626 | ci->suspended = 0; | |
e2b61c1d | 1627 | } |
aa69a809 | 1628 | } |
e443b333 AS |
1629 | |
1630 | if (USBi_UI & intr) | |
26c696c6 | 1631 | isr_tr_complete_handler(ci); |
e443b333 | 1632 | |
e2b61c1d | 1633 | if (USBi_SLI & intr) { |
26c696c6 RZ |
1634 | if (ci->gadget.speed != USB_SPEED_UNKNOWN && |
1635 | ci->driver->suspend) { | |
1636 | ci->suspended = 1; | |
1637 | spin_unlock(&ci->lock); | |
1638 | ci->driver->suspend(&ci->gadget); | |
1639 | spin_lock(&ci->lock); | |
e2b61c1d | 1640 | } |
e2b61c1d | 1641 | } |
aa69a809 DL |
1642 | retval = IRQ_HANDLED; |
1643 | } else { | |
aa69a809 DL |
1644 | retval = IRQ_NONE; |
1645 | } | |
26c696c6 | 1646 | spin_unlock(&ci->lock); |
aa69a809 DL |
1647 | |
1648 | return retval; | |
1649 | } | |
1650 | ||
1651 | /** | |
1652 | * udc_release: driver release function | |
1653 | * @dev: device | |
1654 | * | |
1655 | * Currently does nothing | |
1656 | */ | |
1657 | static void udc_release(struct device *dev) | |
1658 | { | |
aa69a809 DL |
1659 | } |
1660 | ||
1661 | /** | |
5f36e231 | 1662 | * udc_start: initialize gadget role |
26c696c6 | 1663 | * @ci: chipidea controller |
aa69a809 | 1664 | */ |
26c696c6 | 1665 | static int udc_start(struct ci13xxx *ci) |
aa69a809 | 1666 | { |
26c696c6 | 1667 | struct device *dev = ci->dev; |
aa69a809 DL |
1668 | int retval = 0; |
1669 | ||
26c696c6 | 1670 | spin_lock_init(&ci->lock); |
aa69a809 | 1671 | |
26c696c6 RZ |
1672 | ci->gadget.ops = &usb_gadget_ops; |
1673 | ci->gadget.speed = USB_SPEED_UNKNOWN; | |
1674 | ci->gadget.max_speed = USB_SPEED_HIGH; | |
1675 | ci->gadget.is_otg = 0; | |
1676 | ci->gadget.name = ci->platdata->name; | |
aa69a809 | 1677 | |
26c696c6 | 1678 | INIT_LIST_HEAD(&ci->gadget.ep_list); |
aa69a809 | 1679 | |
26c696c6 RZ |
1680 | dev_set_name(&ci->gadget.dev, "gadget"); |
1681 | ci->gadget.dev.dma_mask = dev->dma_mask; | |
1682 | ci->gadget.dev.coherent_dma_mask = dev->coherent_dma_mask; | |
1683 | ci->gadget.dev.parent = dev; | |
1684 | ci->gadget.dev.release = udc_release; | |
aa69a809 | 1685 | |
790c2d52 | 1686 | /* alloc resources */ |
26c696c6 | 1687 | ci->qh_pool = dma_pool_create("ci13xxx_qh", dev, |
790c2d52 AS |
1688 | sizeof(struct ci13xxx_qh), |
1689 | 64, CI13XXX_PAGE_SIZE); | |
26c696c6 | 1690 | if (ci->qh_pool == NULL) |
5f36e231 | 1691 | return -ENOMEM; |
790c2d52 | 1692 | |
26c696c6 | 1693 | ci->td_pool = dma_pool_create("ci13xxx_td", dev, |
790c2d52 AS |
1694 | sizeof(struct ci13xxx_td), |
1695 | 64, CI13XXX_PAGE_SIZE); | |
26c696c6 | 1696 | if (ci->td_pool == NULL) { |
790c2d52 AS |
1697 | retval = -ENOMEM; |
1698 | goto free_qh_pool; | |
1699 | } | |
1700 | ||
26c696c6 | 1701 | retval = init_eps(ci); |
790c2d52 AS |
1702 | if (retval) |
1703 | goto free_pools; | |
1704 | ||
26c696c6 | 1705 | ci->gadget.ep0 = &ci->ep0in->ep; |
f01ef574 | 1706 | |
a2c3d690 RZ |
1707 | if (ci->global_phy) |
1708 | ci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2); | |
f01ef574 | 1709 | |
26c696c6 RZ |
1710 | if (ci->platdata->flags & CI13XXX_REQUIRE_TRANSCEIVER) { |
1711 | if (ci->transceiver == NULL) { | |
f01ef574 | 1712 | retval = -ENODEV; |
790c2d52 | 1713 | goto free_pools; |
f01ef574 PK |
1714 | } |
1715 | } | |
1716 | ||
26c696c6 RZ |
1717 | if (!(ci->platdata->flags & CI13XXX_REGS_SHARED)) { |
1718 | retval = hw_device_reset(ci, USBMODE_CM_DC); | |
f01ef574 PK |
1719 | if (retval) |
1720 | goto put_transceiver; | |
1721 | } | |
1722 | ||
26c696c6 | 1723 | retval = device_register(&ci->gadget.dev); |
f01ef574 | 1724 | if (retval) { |
26c696c6 | 1725 | put_device(&ci->gadget.dev); |
f01ef574 PK |
1726 | goto put_transceiver; |
1727 | } | |
aa69a809 | 1728 | |
26c696c6 | 1729 | retval = dbg_create_files(&ci->gadget.dev); |
f01ef574 PK |
1730 | if (retval) |
1731 | goto unreg_device; | |
1732 | ||
26c696c6 RZ |
1733 | if (!IS_ERR_OR_NULL(ci->transceiver)) { |
1734 | retval = otg_set_peripheral(ci->transceiver->otg, | |
1735 | &ci->gadget); | |
f01ef574 PK |
1736 | if (retval) |
1737 | goto remove_dbg; | |
aa69a809 | 1738 | } |
0f91349b | 1739 | |
26c696c6 | 1740 | retval = usb_add_gadget_udc(dev, &ci->gadget); |
0f91349b SAS |
1741 | if (retval) |
1742 | goto remove_trans; | |
1743 | ||
26c696c6 RZ |
1744 | pm_runtime_no_callbacks(&ci->gadget.dev); |
1745 | pm_runtime_enable(&ci->gadget.dev); | |
aa69a809 | 1746 | |
aa69a809 DL |
1747 | return retval; |
1748 | ||
0f91349b | 1749 | remove_trans: |
26c696c6 | 1750 | if (!IS_ERR_OR_NULL(ci->transceiver)) { |
c9d1f947 | 1751 | otg_set_peripheral(ci->transceiver->otg, NULL); |
a2c3d690 RZ |
1752 | if (ci->global_phy) |
1753 | usb_put_phy(ci->transceiver); | |
0f91349b SAS |
1754 | } |
1755 | ||
0917ba84 | 1756 | dev_err(dev, "error = %i\n", retval); |
f01ef574 | 1757 | remove_dbg: |
26c696c6 | 1758 | dbg_remove_files(&ci->gadget.dev); |
f01ef574 | 1759 | unreg_device: |
26c696c6 | 1760 | device_unregister(&ci->gadget.dev); |
f01ef574 | 1761 | put_transceiver: |
a2c3d690 | 1762 | if (!IS_ERR_OR_NULL(ci->transceiver) && ci->global_phy) |
26c696c6 | 1763 | usb_put_phy(ci->transceiver); |
790c2d52 | 1764 | free_pools: |
26c696c6 | 1765 | dma_pool_destroy(ci->td_pool); |
790c2d52 | 1766 | free_qh_pool: |
26c696c6 | 1767 | dma_pool_destroy(ci->qh_pool); |
aa69a809 DL |
1768 | return retval; |
1769 | } | |
1770 | ||
1771 | /** | |
1772 | * udc_remove: parent remove must call this to remove UDC | |
1773 | * | |
1774 | * No interrupts active, the IRQ has been released | |
1775 | */ | |
26c696c6 | 1776 | static void udc_stop(struct ci13xxx *ci) |
aa69a809 | 1777 | { |
790c2d52 | 1778 | int i; |
aa69a809 | 1779 | |
26c696c6 | 1780 | if (ci == NULL) |
aa69a809 | 1781 | return; |
0f089094 | 1782 | |
26c696c6 | 1783 | usb_del_gadget_udc(&ci->gadget); |
aa69a809 | 1784 | |
26c696c6 RZ |
1785 | for (i = 0; i < ci->hw_ep_max; i++) { |
1786 | struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i]; | |
790c2d52 | 1787 | |
26c696c6 | 1788 | dma_pool_free(ci->qh_pool, mEp->qh.ptr, mEp->qh.dma); |
790c2d52 AS |
1789 | } |
1790 | ||
26c696c6 RZ |
1791 | dma_pool_destroy(ci->td_pool); |
1792 | dma_pool_destroy(ci->qh_pool); | |
790c2d52 | 1793 | |
26c696c6 RZ |
1794 | if (!IS_ERR_OR_NULL(ci->transceiver)) { |
1795 | otg_set_peripheral(ci->transceiver->otg, NULL); | |
a2c3d690 RZ |
1796 | if (ci->global_phy) |
1797 | usb_put_phy(ci->transceiver); | |
f01ef574 | 1798 | } |
26c696c6 RZ |
1799 | dbg_remove_files(&ci->gadget.dev); |
1800 | device_unregister(&ci->gadget.dev); | |
5f36e231 | 1801 | /* my kobject is dynamic, I swear! */ |
26c696c6 | 1802 | memset(&ci->gadget, 0, sizeof(ci->gadget)); |
5f36e231 AS |
1803 | } |
1804 | ||
1805 | /** | |
1806 | * ci_hdrc_gadget_init - initialize device related bits | |
1807 | * ci: the controller | |
1808 | * | |
1809 | * This function enables the gadget role, if the device is "device capable". | |
1810 | */ | |
1811 | int ci_hdrc_gadget_init(struct ci13xxx *ci) | |
1812 | { | |
1813 | struct ci_role_driver *rdrv; | |
1814 | ||
1815 | if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DC)) | |
1816 | return -ENXIO; | |
1817 | ||
1818 | rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL); | |
1819 | if (!rdrv) | |
1820 | return -ENOMEM; | |
1821 | ||
1822 | rdrv->start = udc_start; | |
1823 | rdrv->stop = udc_stop; | |
1824 | rdrv->irq = udc_irq; | |
1825 | rdrv->name = "gadget"; | |
1826 | ci->roles[CI_ROLE_GADGET] = rdrv; | |
aa69a809 | 1827 | |
5f36e231 | 1828 | return 0; |
aa69a809 | 1829 | } |