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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> | |
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 */ | |
727b4ddb | 143 | data = type << __ffs(mask); |
aa69a809 DL |
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 */ | |
727b4ddb | 152 | data = type << __ffs(mask); |
aa69a809 DL |
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, |
727b4ddb | 334 | value << __ffs(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 | 406 | memset(mReq->zptr, 0, sizeof(*mReq->zptr)); |
938d323f SN |
407 | mReq->zptr->next = cpu_to_le32(TD_TERMINATE); |
408 | mReq->zptr->token = cpu_to_le32(TD_STATUS_ACTIVE); | |
0e6ca199 | 409 | if (!mReq->req.no_interrupt) |
938d323f | 410 | mReq->zptr->token |= cpu_to_le32(TD_IOC); |
0e6ca199 | 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)); | |
938d323f SN |
421 | mReq->ptr->token = cpu_to_le32(length << __ffs(TD_TOTAL_BYTES)); |
422 | mReq->ptr->token &= cpu_to_le32(TD_TOTAL_BYTES); | |
423 | mReq->ptr->token |= cpu_to_le32(TD_STATUS_ACTIVE); | |
0e6ca199 | 424 | if (mReq->zptr) { |
938d323f | 425 | mReq->ptr->next = cpu_to_le32(mReq->zdma); |
0e6ca199 | 426 | } else { |
938d323f | 427 | mReq->ptr->next = cpu_to_le32(TD_TERMINATE); |
0e6ca199 | 428 | if (!mReq->req.no_interrupt) |
938d323f SN |
429 | mReq->ptr->token |= cpu_to_le32(TD_IOC); |
430 | } | |
431 | mReq->ptr->page[0] = cpu_to_le32(mReq->req.dma); | |
b983e51a | 432 | for (i = 1; i < TD_PAGE_COUNT; i++) { |
938d323f SN |
433 | u32 page = mReq->req.dma + i * CI13XXX_PAGE_SIZE; |
434 | page &= ~TD_RESERVED_MASK; | |
435 | mReq->ptr->page[i] = cpu_to_le32(page); | |
0e6ca199 | 436 | } |
aa69a809 | 437 | |
a9c17430 MG |
438 | wmb(); |
439 | ||
0e6ca199 PK |
440 | if (!list_empty(&mEp->qh.queue)) { |
441 | struct ci13xxx_req *mReqPrev; | |
442 | int n = hw_ep_bit(mEp->num, mEp->dir); | |
443 | int tmp_stat; | |
938d323f | 444 | u32 next = mReq->dma & TD_ADDR_MASK; |
0e6ca199 PK |
445 | |
446 | mReqPrev = list_entry(mEp->qh.queue.prev, | |
447 | struct ci13xxx_req, queue); | |
448 | if (mReqPrev->zptr) | |
938d323f | 449 | mReqPrev->zptr->next = cpu_to_le32(next); |
0e6ca199 | 450 | else |
938d323f | 451 | mReqPrev->ptr->next = cpu_to_le32(next); |
0e6ca199 | 452 | wmb(); |
26c696c6 | 453 | if (hw_read(ci, OP_ENDPTPRIME, BIT(n))) |
0e6ca199 PK |
454 | goto done; |
455 | do { | |
26c696c6 RZ |
456 | hw_write(ci, OP_USBCMD, USBCMD_ATDTW, USBCMD_ATDTW); |
457 | tmp_stat = hw_read(ci, OP_ENDPTSTAT, BIT(n)); | |
458 | } while (!hw_read(ci, OP_USBCMD, USBCMD_ATDTW)); | |
459 | hw_write(ci, OP_USBCMD, USBCMD_ATDTW, 0); | |
0e6ca199 PK |
460 | if (tmp_stat) |
461 | goto done; | |
462 | } | |
463 | ||
464 | /* QH configuration */ | |
938d323f | 465 | mEp->qh.ptr->td.next = cpu_to_le32(mReq->dma); /* TERMINATE = 0 */ |
080ff5f4 MG |
466 | mEp->qh.ptr->td.token &= |
467 | cpu_to_le32(~(TD_STATUS_HALTED|TD_STATUS_ACTIVE)); | |
aa69a809 DL |
468 | |
469 | wmb(); /* synchronize before ep prime */ | |
470 | ||
26c696c6 | 471 | ret = hw_ep_prime(ci, mEp->num, mEp->dir, |
aa69a809 | 472 | mEp->type == USB_ENDPOINT_XFER_CONTROL); |
0e6ca199 PK |
473 | done: |
474 | return ret; | |
aa69a809 DL |
475 | } |
476 | ||
477 | /** | |
478 | * _hardware_dequeue: handles a request at hardware level | |
479 | * @gadget: gadget | |
480 | * @mEp: endpoint | |
481 | * | |
482 | * This function returns an error code | |
483 | */ | |
484 | static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq) | |
485 | { | |
9e506438 MG |
486 | u32 tmptoken = le32_to_cpu(mReq->ptr->token); |
487 | ||
aa69a809 DL |
488 | if (mReq->req.status != -EALREADY) |
489 | return -EINVAL; | |
490 | ||
9e506438 | 491 | if ((TD_STATUS_ACTIVE & tmptoken) != 0) |
0e6ca199 PK |
492 | return -EBUSY; |
493 | ||
494 | if (mReq->zptr) { | |
938d323f | 495 | if ((cpu_to_le32(TD_STATUS_ACTIVE) & mReq->zptr->token) != 0) |
0e6ca199 PK |
496 | return -EBUSY; |
497 | dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma); | |
498 | mReq->zptr = NULL; | |
499 | } | |
aa69a809 DL |
500 | |
501 | mReq->req.status = 0; | |
502 | ||
26c696c6 | 503 | usb_gadget_unmap_request(&mEp->ci->gadget, &mReq->req, mEp->dir); |
aa69a809 | 504 | |
9e506438 | 505 | mReq->req.status = tmptoken & TD_STATUS; |
0e6ca199 | 506 | if ((TD_STATUS_HALTED & mReq->req.status) != 0) |
aa69a809 DL |
507 | mReq->req.status = -1; |
508 | else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0) | |
509 | mReq->req.status = -1; | |
510 | else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0) | |
511 | mReq->req.status = -1; | |
512 | ||
9e506438 | 513 | mReq->req.actual = tmptoken & TD_TOTAL_BYTES; |
727b4ddb | 514 | mReq->req.actual >>= __ffs(TD_TOTAL_BYTES); |
aa69a809 DL |
515 | mReq->req.actual = mReq->req.length - mReq->req.actual; |
516 | mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual; | |
517 | ||
518 | return mReq->req.actual; | |
519 | } | |
520 | ||
521 | /** | |
522 | * _ep_nuke: dequeues all endpoint requests | |
523 | * @mEp: endpoint | |
524 | * | |
525 | * This function returns an error code | |
526 | * Caller must hold lock | |
527 | */ | |
528 | static int _ep_nuke(struct ci13xxx_ep *mEp) | |
529 | __releases(mEp->lock) | |
530 | __acquires(mEp->lock) | |
531 | { | |
aa69a809 DL |
532 | if (mEp == NULL) |
533 | return -EINVAL; | |
534 | ||
26c696c6 | 535 | hw_ep_flush(mEp->ci, mEp->num, mEp->dir); |
aa69a809 | 536 | |
ca9cfea0 | 537 | while (!list_empty(&mEp->qh.queue)) { |
aa69a809 DL |
538 | |
539 | /* pop oldest request */ | |
540 | struct ci13xxx_req *mReq = \ | |
ca9cfea0 | 541 | list_entry(mEp->qh.queue.next, |
aa69a809 | 542 | struct ci13xxx_req, queue); |
7ca2cd29 MG |
543 | |
544 | if (mReq->zptr) { | |
545 | dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma); | |
546 | mReq->zptr = NULL; | |
547 | } | |
548 | ||
aa69a809 DL |
549 | list_del_init(&mReq->queue); |
550 | mReq->req.status = -ESHUTDOWN; | |
551 | ||
7c25a826 | 552 | if (mReq->req.complete != NULL) { |
aa69a809 DL |
553 | spin_unlock(mEp->lock); |
554 | mReq->req.complete(&mEp->ep, &mReq->req); | |
555 | spin_lock(mEp->lock); | |
556 | } | |
557 | } | |
558 | return 0; | |
559 | } | |
560 | ||
561 | /** | |
562 | * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts | |
563 | * @gadget: gadget | |
564 | * | |
565 | * This function returns an error code | |
aa69a809 DL |
566 | */ |
567 | static int _gadget_stop_activity(struct usb_gadget *gadget) | |
aa69a809 DL |
568 | { |
569 | struct usb_ep *ep; | |
26c696c6 | 570 | struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget); |
e2b61c1d | 571 | unsigned long flags; |
aa69a809 | 572 | |
26c696c6 RZ |
573 | spin_lock_irqsave(&ci->lock, flags); |
574 | ci->gadget.speed = USB_SPEED_UNKNOWN; | |
575 | ci->remote_wakeup = 0; | |
576 | ci->suspended = 0; | |
577 | spin_unlock_irqrestore(&ci->lock, flags); | |
e2b61c1d | 578 | |
aa69a809 DL |
579 | /* flush all endpoints */ |
580 | gadget_for_each_ep(ep, gadget) { | |
581 | usb_ep_fifo_flush(ep); | |
582 | } | |
26c696c6 RZ |
583 | usb_ep_fifo_flush(&ci->ep0out->ep); |
584 | usb_ep_fifo_flush(&ci->ep0in->ep); | |
aa69a809 | 585 | |
26c696c6 RZ |
586 | if (ci->driver) |
587 | ci->driver->disconnect(gadget); | |
aa69a809 DL |
588 | |
589 | /* make sure to disable all endpoints */ | |
590 | gadget_for_each_ep(ep, gadget) { | |
591 | usb_ep_disable(ep); | |
592 | } | |
aa69a809 | 593 | |
26c696c6 RZ |
594 | if (ci->status != NULL) { |
595 | usb_ep_free_request(&ci->ep0in->ep, ci->status); | |
596 | ci->status = NULL; | |
aa69a809 DL |
597 | } |
598 | ||
aa69a809 DL |
599 | return 0; |
600 | } | |
601 | ||
602 | /****************************************************************************** | |
603 | * ISR block | |
604 | *****************************************************************************/ | |
605 | /** | |
606 | * isr_reset_handler: USB reset interrupt handler | |
26c696c6 | 607 | * @ci: UDC device |
aa69a809 DL |
608 | * |
609 | * This function resets USB engine after a bus reset occurred | |
610 | */ | |
26c696c6 RZ |
611 | static void isr_reset_handler(struct ci13xxx *ci) |
612 | __releases(ci->lock) | |
613 | __acquires(ci->lock) | |
aa69a809 | 614 | { |
aa69a809 DL |
615 | int retval; |
616 | ||
26c696c6 RZ |
617 | spin_unlock(&ci->lock); |
618 | retval = _gadget_stop_activity(&ci->gadget); | |
aa69a809 DL |
619 | if (retval) |
620 | goto done; | |
621 | ||
26c696c6 | 622 | retval = hw_usb_reset(ci); |
aa69a809 DL |
623 | if (retval) |
624 | goto done; | |
625 | ||
26c696c6 RZ |
626 | ci->status = usb_ep_alloc_request(&ci->ep0in->ep, GFP_ATOMIC); |
627 | if (ci->status == NULL) | |
ac1aa6a2 | 628 | retval = -ENOMEM; |
ca9cfea0 | 629 | |
b9322252 | 630 | done: |
26c696c6 | 631 | spin_lock(&ci->lock); |
aa69a809 | 632 | |
aa69a809 | 633 | if (retval) |
26c696c6 | 634 | dev_err(ci->dev, "error: %i\n", retval); |
aa69a809 DL |
635 | } |
636 | ||
637 | /** | |
638 | * isr_get_status_complete: get_status request complete function | |
639 | * @ep: endpoint | |
640 | * @req: request handled | |
641 | * | |
642 | * Caller must release lock | |
643 | */ | |
644 | static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req) | |
645 | { | |
0f089094 | 646 | if (ep == NULL || req == NULL) |
aa69a809 | 647 | return; |
aa69a809 DL |
648 | |
649 | kfree(req->buf); | |
650 | usb_ep_free_request(ep, req); | |
651 | } | |
652 | ||
dd064e9d MG |
653 | /** |
654 | * _ep_queue: queues (submits) an I/O request to an endpoint | |
655 | * | |
656 | * Caller must hold lock | |
657 | */ | |
658 | static int _ep_queue(struct usb_ep *ep, struct usb_request *req, | |
659 | gfp_t __maybe_unused gfp_flags) | |
660 | { | |
661 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
662 | struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req); | |
663 | struct ci13xxx *ci = mEp->ci; | |
664 | int retval = 0; | |
665 | ||
666 | if (ep == NULL || req == NULL || mEp->ep.desc == NULL) | |
667 | return -EINVAL; | |
668 | ||
669 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) { | |
670 | if (req->length) | |
671 | mEp = (ci->ep0_dir == RX) ? | |
672 | ci->ep0out : ci->ep0in; | |
673 | if (!list_empty(&mEp->qh.queue)) { | |
674 | _ep_nuke(mEp); | |
675 | retval = -EOVERFLOW; | |
676 | dev_warn(mEp->ci->dev, "endpoint ctrl %X nuked\n", | |
677 | _usb_addr(mEp)); | |
678 | } | |
679 | } | |
680 | ||
681 | /* first nuke then test link, e.g. previous status has not sent */ | |
682 | if (!list_empty(&mReq->queue)) { | |
683 | dev_err(mEp->ci->dev, "request already in queue\n"); | |
684 | return -EBUSY; | |
685 | } | |
686 | ||
b983e51a | 687 | if (req->length > (TD_PAGE_COUNT - 1) * CI13XXX_PAGE_SIZE) { |
dd064e9d MG |
688 | dev_err(mEp->ci->dev, "request bigger than one td\n"); |
689 | return -EMSGSIZE; | |
690 | } | |
691 | ||
692 | /* push request */ | |
693 | mReq->req.status = -EINPROGRESS; | |
694 | mReq->req.actual = 0; | |
695 | ||
696 | retval = _hardware_enqueue(mEp, mReq); | |
697 | ||
698 | if (retval == -EALREADY) | |
699 | retval = 0; | |
700 | if (!retval) | |
701 | list_add_tail(&mReq->queue, &mEp->qh.queue); | |
702 | ||
703 | return retval; | |
704 | } | |
705 | ||
aa69a809 DL |
706 | /** |
707 | * isr_get_status_response: get_status request response | |
26c696c6 | 708 | * @ci: ci struct |
aa69a809 DL |
709 | * @setup: setup request packet |
710 | * | |
711 | * This function returns an error code | |
712 | */ | |
26c696c6 | 713 | static int isr_get_status_response(struct ci13xxx *ci, |
aa69a809 DL |
714 | struct usb_ctrlrequest *setup) |
715 | __releases(mEp->lock) | |
716 | __acquires(mEp->lock) | |
717 | { | |
26c696c6 | 718 | struct ci13xxx_ep *mEp = ci->ep0in; |
aa69a809 DL |
719 | struct usb_request *req = NULL; |
720 | gfp_t gfp_flags = GFP_ATOMIC; | |
721 | int dir, num, retval; | |
722 | ||
aa69a809 DL |
723 | if (mEp == NULL || setup == NULL) |
724 | return -EINVAL; | |
725 | ||
726 | spin_unlock(mEp->lock); | |
727 | req = usb_ep_alloc_request(&mEp->ep, gfp_flags); | |
728 | spin_lock(mEp->lock); | |
729 | if (req == NULL) | |
730 | return -ENOMEM; | |
731 | ||
732 | req->complete = isr_get_status_complete; | |
733 | req->length = 2; | |
734 | req->buf = kzalloc(req->length, gfp_flags); | |
735 | if (req->buf == NULL) { | |
736 | retval = -ENOMEM; | |
737 | goto err_free_req; | |
738 | } | |
739 | ||
740 | if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) { | |
e2b61c1d | 741 | /* Assume that device is bus powered for now. */ |
26c696c6 | 742 | *(u16 *)req->buf = ci->remote_wakeup << 1; |
aa69a809 DL |
743 | retval = 0; |
744 | } else if ((setup->bRequestType & USB_RECIP_MASK) \ | |
745 | == USB_RECIP_ENDPOINT) { | |
746 | dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ? | |
747 | TX : RX; | |
748 | num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK; | |
26c696c6 | 749 | *(u16 *)req->buf = hw_ep_get_halt(ci, num, dir); |
aa69a809 DL |
750 | } |
751 | /* else do nothing; reserved for future use */ | |
752 | ||
dd064e9d | 753 | retval = _ep_queue(&mEp->ep, req, gfp_flags); |
aa69a809 DL |
754 | if (retval) |
755 | goto err_free_buf; | |
756 | ||
757 | return 0; | |
758 | ||
759 | err_free_buf: | |
760 | kfree(req->buf); | |
761 | err_free_req: | |
762 | spin_unlock(mEp->lock); | |
763 | usb_ep_free_request(&mEp->ep, req); | |
764 | spin_lock(mEp->lock); | |
765 | return retval; | |
766 | } | |
767 | ||
541cace8 PK |
768 | /** |
769 | * isr_setup_status_complete: setup_status request complete function | |
770 | * @ep: endpoint | |
771 | * @req: request handled | |
772 | * | |
773 | * Caller must release lock. Put the port in test mode if test mode | |
774 | * feature is selected. | |
775 | */ | |
776 | static void | |
777 | isr_setup_status_complete(struct usb_ep *ep, struct usb_request *req) | |
778 | { | |
26c696c6 | 779 | struct ci13xxx *ci = req->context; |
541cace8 PK |
780 | unsigned long flags; |
781 | ||
26c696c6 RZ |
782 | if (ci->setaddr) { |
783 | hw_usb_set_address(ci, ci->address); | |
784 | ci->setaddr = false; | |
ef15e549 AS |
785 | } |
786 | ||
26c696c6 RZ |
787 | spin_lock_irqsave(&ci->lock, flags); |
788 | if (ci->test_mode) | |
789 | hw_port_test_set(ci, ci->test_mode); | |
790 | spin_unlock_irqrestore(&ci->lock, flags); | |
541cace8 PK |
791 | } |
792 | ||
aa69a809 DL |
793 | /** |
794 | * isr_setup_status_phase: queues the status phase of a setup transation | |
26c696c6 | 795 | * @ci: ci struct |
aa69a809 DL |
796 | * |
797 | * This function returns an error code | |
798 | */ | |
26c696c6 | 799 | static int isr_setup_status_phase(struct ci13xxx *ci) |
aa69a809 DL |
800 | { |
801 | int retval; | |
ca9cfea0 | 802 | struct ci13xxx_ep *mEp; |
aa69a809 | 803 | |
26c696c6 RZ |
804 | mEp = (ci->ep0_dir == TX) ? ci->ep0out : ci->ep0in; |
805 | ci->status->context = ci; | |
806 | ci->status->complete = isr_setup_status_complete; | |
aa69a809 | 807 | |
dd064e9d | 808 | retval = _ep_queue(&mEp->ep, ci->status, GFP_ATOMIC); |
aa69a809 DL |
809 | |
810 | return retval; | |
811 | } | |
812 | ||
813 | /** | |
814 | * isr_tr_complete_low: transaction complete low level handler | |
815 | * @mEp: endpoint | |
816 | * | |
817 | * This function returns an error code | |
818 | * Caller must hold lock | |
819 | */ | |
820 | static int isr_tr_complete_low(struct ci13xxx_ep *mEp) | |
821 | __releases(mEp->lock) | |
822 | __acquires(mEp->lock) | |
823 | { | |
0e6ca199 | 824 | struct ci13xxx_req *mReq, *mReqTemp; |
76cd9cfb | 825 | struct ci13xxx_ep *mEpTemp = mEp; |
db89960e | 826 | int retval = 0; |
aa69a809 | 827 | |
0e6ca199 PK |
828 | list_for_each_entry_safe(mReq, mReqTemp, &mEp->qh.queue, |
829 | queue) { | |
830 | retval = _hardware_dequeue(mEp, mReq); | |
831 | if (retval < 0) | |
832 | break; | |
833 | list_del_init(&mReq->queue); | |
0e6ca199 PK |
834 | if (mReq->req.complete != NULL) { |
835 | spin_unlock(mEp->lock); | |
76cd9cfb PK |
836 | if ((mEp->type == USB_ENDPOINT_XFER_CONTROL) && |
837 | mReq->req.length) | |
26c696c6 | 838 | mEpTemp = mEp->ci->ep0in; |
76cd9cfb | 839 | mReq->req.complete(&mEpTemp->ep, &mReq->req); |
0e6ca199 PK |
840 | spin_lock(mEp->lock); |
841 | } | |
d9bb9c18 AL |
842 | } |
843 | ||
ef907482 | 844 | if (retval == -EBUSY) |
0e6ca199 | 845 | retval = 0; |
aa69a809 | 846 | |
aa69a809 DL |
847 | return retval; |
848 | } | |
849 | ||
850 | /** | |
851 | * isr_tr_complete_handler: transaction complete interrupt handler | |
26c696c6 | 852 | * @ci: UDC descriptor |
aa69a809 DL |
853 | * |
854 | * This function handles traffic events | |
855 | */ | |
26c696c6 RZ |
856 | static void isr_tr_complete_handler(struct ci13xxx *ci) |
857 | __releases(ci->lock) | |
858 | __acquires(ci->lock) | |
aa69a809 DL |
859 | { |
860 | unsigned i; | |
541cace8 | 861 | u8 tmode = 0; |
aa69a809 | 862 | |
26c696c6 RZ |
863 | for (i = 0; i < ci->hw_ep_max; i++) { |
864 | struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i]; | |
4c5212b7 | 865 | int type, num, dir, err = -EINVAL; |
aa69a809 DL |
866 | struct usb_ctrlrequest req; |
867 | ||
31fb6014 | 868 | if (mEp->ep.desc == NULL) |
aa69a809 DL |
869 | continue; /* not configured */ |
870 | ||
26c696c6 | 871 | if (hw_test_and_clear_complete(ci, i)) { |
aa69a809 DL |
872 | err = isr_tr_complete_low(mEp); |
873 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) { | |
874 | if (err > 0) /* needs status phase */ | |
26c696c6 | 875 | err = isr_setup_status_phase(ci); |
aa69a809 | 876 | if (err < 0) { |
26c696c6 | 877 | spin_unlock(&ci->lock); |
aa69a809 | 878 | if (usb_ep_set_halt(&mEp->ep)) |
26c696c6 | 879 | dev_err(ci->dev, |
0917ba84 | 880 | "error: ep_set_halt\n"); |
26c696c6 | 881 | spin_lock(&ci->lock); |
aa69a809 DL |
882 | } |
883 | } | |
884 | } | |
885 | ||
886 | if (mEp->type != USB_ENDPOINT_XFER_CONTROL || | |
26c696c6 | 887 | !hw_test_and_clear_setup_status(ci, i)) |
aa69a809 DL |
888 | continue; |
889 | ||
890 | if (i != 0) { | |
26c696c6 | 891 | dev_warn(ci->dev, "ctrl traffic at endpoint %d\n", i); |
aa69a809 DL |
892 | continue; |
893 | } | |
894 | ||
ca9cfea0 PK |
895 | /* |
896 | * Flush data and handshake transactions of previous | |
897 | * setup packet. | |
898 | */ | |
26c696c6 RZ |
899 | _ep_nuke(ci->ep0out); |
900 | _ep_nuke(ci->ep0in); | |
ca9cfea0 | 901 | |
aa69a809 DL |
902 | /* read_setup_packet */ |
903 | do { | |
26c696c6 | 904 | hw_test_and_set_setup_guard(ci); |
ca9cfea0 | 905 | memcpy(&req, &mEp->qh.ptr->setup, sizeof(req)); |
26c696c6 | 906 | } while (!hw_test_and_clear_setup_guard(ci)); |
aa69a809 DL |
907 | |
908 | type = req.bRequestType; | |
909 | ||
26c696c6 | 910 | ci->ep0_dir = (type & USB_DIR_IN) ? TX : RX; |
aa69a809 | 911 | |
aa69a809 DL |
912 | switch (req.bRequest) { |
913 | case USB_REQ_CLEAR_FEATURE: | |
e2b61c1d PK |
914 | if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) && |
915 | le16_to_cpu(req.wValue) == | |
916 | USB_ENDPOINT_HALT) { | |
917 | if (req.wLength != 0) | |
918 | break; | |
919 | num = le16_to_cpu(req.wIndex); | |
4c5212b7 | 920 | dir = num & USB_ENDPOINT_DIR_MASK; |
e2b61c1d | 921 | num &= USB_ENDPOINT_NUMBER_MASK; |
4c5212b7 | 922 | if (dir) /* TX */ |
26c696c6 RZ |
923 | num += ci->hw_ep_max/2; |
924 | if (!ci->ci13xxx_ep[num].wedge) { | |
925 | spin_unlock(&ci->lock); | |
e2b61c1d | 926 | err = usb_ep_clear_halt( |
26c696c6 RZ |
927 | &ci->ci13xxx_ep[num].ep); |
928 | spin_lock(&ci->lock); | |
e2b61c1d PK |
929 | if (err) |
930 | break; | |
931 | } | |
26c696c6 | 932 | err = isr_setup_status_phase(ci); |
e2b61c1d PK |
933 | } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE) && |
934 | le16_to_cpu(req.wValue) == | |
935 | USB_DEVICE_REMOTE_WAKEUP) { | |
936 | if (req.wLength != 0) | |
aa69a809 | 937 | break; |
26c696c6 RZ |
938 | ci->remote_wakeup = 0; |
939 | err = isr_setup_status_phase(ci); | |
e2b61c1d PK |
940 | } else { |
941 | goto delegate; | |
aa69a809 | 942 | } |
aa69a809 DL |
943 | break; |
944 | case USB_REQ_GET_STATUS: | |
945 | if (type != (USB_DIR_IN|USB_RECIP_DEVICE) && | |
946 | type != (USB_DIR_IN|USB_RECIP_ENDPOINT) && | |
947 | type != (USB_DIR_IN|USB_RECIP_INTERFACE)) | |
948 | goto delegate; | |
949 | if (le16_to_cpu(req.wLength) != 2 || | |
950 | le16_to_cpu(req.wValue) != 0) | |
951 | break; | |
26c696c6 | 952 | err = isr_get_status_response(ci, &req); |
aa69a809 DL |
953 | break; |
954 | case USB_REQ_SET_ADDRESS: | |
955 | if (type != (USB_DIR_OUT|USB_RECIP_DEVICE)) | |
956 | goto delegate; | |
957 | if (le16_to_cpu(req.wLength) != 0 || | |
958 | le16_to_cpu(req.wIndex) != 0) | |
959 | break; | |
26c696c6 RZ |
960 | ci->address = (u8)le16_to_cpu(req.wValue); |
961 | ci->setaddr = true; | |
962 | err = isr_setup_status_phase(ci); | |
aa69a809 DL |
963 | break; |
964 | case USB_REQ_SET_FEATURE: | |
e2b61c1d PK |
965 | if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) && |
966 | le16_to_cpu(req.wValue) == | |
967 | USB_ENDPOINT_HALT) { | |
968 | if (req.wLength != 0) | |
969 | break; | |
970 | num = le16_to_cpu(req.wIndex); | |
4c5212b7 | 971 | dir = num & USB_ENDPOINT_DIR_MASK; |
e2b61c1d | 972 | num &= USB_ENDPOINT_NUMBER_MASK; |
4c5212b7 | 973 | if (dir) /* TX */ |
26c696c6 | 974 | num += ci->hw_ep_max/2; |
aa69a809 | 975 | |
26c696c6 RZ |
976 | spin_unlock(&ci->lock); |
977 | err = usb_ep_set_halt(&ci->ci13xxx_ep[num].ep); | |
978 | spin_lock(&ci->lock); | |
e2b61c1d | 979 | if (!err) |
26c696c6 | 980 | isr_setup_status_phase(ci); |
541cace8 | 981 | } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE)) { |
e2b61c1d PK |
982 | if (req.wLength != 0) |
983 | break; | |
541cace8 PK |
984 | switch (le16_to_cpu(req.wValue)) { |
985 | case USB_DEVICE_REMOTE_WAKEUP: | |
26c696c6 RZ |
986 | ci->remote_wakeup = 1; |
987 | err = isr_setup_status_phase(ci); | |
541cace8 PK |
988 | break; |
989 | case USB_DEVICE_TEST_MODE: | |
990 | tmode = le16_to_cpu(req.wIndex) >> 8; | |
991 | switch (tmode) { | |
992 | case TEST_J: | |
993 | case TEST_K: | |
994 | case TEST_SE0_NAK: | |
995 | case TEST_PACKET: | |
996 | case TEST_FORCE_EN: | |
26c696c6 | 997 | ci->test_mode = tmode; |
541cace8 | 998 | err = isr_setup_status_phase( |
26c696c6 | 999 | ci); |
541cace8 PK |
1000 | break; |
1001 | default: | |
1002 | break; | |
1003 | } | |
1004 | default: | |
1005 | goto delegate; | |
1006 | } | |
e2b61c1d PK |
1007 | } else { |
1008 | goto delegate; | |
1009 | } | |
aa69a809 DL |
1010 | break; |
1011 | default: | |
1012 | delegate: | |
1013 | if (req.wLength == 0) /* no data phase */ | |
26c696c6 | 1014 | ci->ep0_dir = TX; |
aa69a809 | 1015 | |
26c696c6 RZ |
1016 | spin_unlock(&ci->lock); |
1017 | err = ci->driver->setup(&ci->gadget, &req); | |
1018 | spin_lock(&ci->lock); | |
aa69a809 DL |
1019 | break; |
1020 | } | |
1021 | ||
1022 | if (err < 0) { | |
26c696c6 | 1023 | spin_unlock(&ci->lock); |
aa69a809 | 1024 | if (usb_ep_set_halt(&mEp->ep)) |
26c696c6 RZ |
1025 | dev_err(ci->dev, "error: ep_set_halt\n"); |
1026 | spin_lock(&ci->lock); | |
aa69a809 DL |
1027 | } |
1028 | } | |
1029 | } | |
1030 | ||
1031 | /****************************************************************************** | |
1032 | * ENDPT block | |
1033 | *****************************************************************************/ | |
1034 | /** | |
1035 | * ep_enable: configure endpoint, making it usable | |
1036 | * | |
1037 | * Check usb_ep_enable() at "usb_gadget.h" for details | |
1038 | */ | |
1039 | static int ep_enable(struct usb_ep *ep, | |
1040 | const struct usb_endpoint_descriptor *desc) | |
1041 | { | |
1042 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
ca9cfea0 | 1043 | int retval = 0; |
aa69a809 | 1044 | unsigned long flags; |
1cd12a9c | 1045 | u32 cap = 0; |
aa69a809 | 1046 | |
aa69a809 DL |
1047 | if (ep == NULL || desc == NULL) |
1048 | return -EINVAL; | |
1049 | ||
1050 | spin_lock_irqsave(mEp->lock, flags); | |
1051 | ||
1052 | /* only internal SW should enable ctrl endpts */ | |
1053 | ||
31fb6014 | 1054 | mEp->ep.desc = desc; |
aa69a809 | 1055 | |
ca9cfea0 | 1056 | if (!list_empty(&mEp->qh.queue)) |
26c696c6 | 1057 | dev_warn(mEp->ci->dev, "enabling a non-empty endpoint!\n"); |
aa69a809 | 1058 | |
15739bb5 MK |
1059 | mEp->dir = usb_endpoint_dir_in(desc) ? TX : RX; |
1060 | mEp->num = usb_endpoint_num(desc); | |
1061 | mEp->type = usb_endpoint_type(desc); | |
aa69a809 | 1062 | |
29cc8897 | 1063 | mEp->ep.maxpacket = usb_endpoint_maxp(desc); |
aa69a809 | 1064 | |
ca9cfea0 | 1065 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) |
1cd12a9c | 1066 | cap |= QH_IOS; |
776ffc16 MG |
1067 | if (mEp->num) |
1068 | cap |= QH_ZLT; | |
1cd12a9c MG |
1069 | cap |= (mEp->ep.maxpacket << __ffs(QH_MAX_PKT)) & QH_MAX_PKT; |
1070 | ||
1071 | mEp->qh.ptr->cap = cpu_to_le32(cap); | |
1072 | ||
938d323f | 1073 | mEp->qh.ptr->td.next |= cpu_to_le32(TD_TERMINATE); /* needed? */ |
aa69a809 | 1074 | |
ac1aa6a2 A |
1075 | /* |
1076 | * Enable endpoints in the HW other than ep0 as ep0 | |
1077 | * is always enabled | |
1078 | */ | |
1079 | if (mEp->num) | |
26c696c6 | 1080 | retval |= hw_ep_enable(mEp->ci, mEp->num, mEp->dir, mEp->type); |
aa69a809 DL |
1081 | |
1082 | spin_unlock_irqrestore(mEp->lock, flags); | |
1083 | return retval; | |
1084 | } | |
1085 | ||
1086 | /** | |
1087 | * ep_disable: endpoint is no longer usable | |
1088 | * | |
1089 | * Check usb_ep_disable() at "usb_gadget.h" for details | |
1090 | */ | |
1091 | static int ep_disable(struct usb_ep *ep) | |
1092 | { | |
1093 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1094 | int direction, retval = 0; | |
1095 | unsigned long flags; | |
1096 | ||
aa69a809 DL |
1097 | if (ep == NULL) |
1098 | return -EINVAL; | |
31fb6014 | 1099 | else if (mEp->ep.desc == NULL) |
aa69a809 DL |
1100 | return -EBUSY; |
1101 | ||
1102 | spin_lock_irqsave(mEp->lock, flags); | |
1103 | ||
1104 | /* only internal SW should disable ctrl endpts */ | |
1105 | ||
1106 | direction = mEp->dir; | |
1107 | do { | |
aa69a809 | 1108 | retval |= _ep_nuke(mEp); |
26c696c6 | 1109 | retval |= hw_ep_disable(mEp->ci, mEp->num, mEp->dir); |
aa69a809 DL |
1110 | |
1111 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) | |
1112 | mEp->dir = (mEp->dir == TX) ? RX : TX; | |
1113 | ||
1114 | } while (mEp->dir != direction); | |
1115 | ||
f9c56cdd | 1116 | mEp->ep.desc = NULL; |
aa69a809 DL |
1117 | |
1118 | spin_unlock_irqrestore(mEp->lock, flags); | |
1119 | return retval; | |
1120 | } | |
1121 | ||
1122 | /** | |
1123 | * ep_alloc_request: allocate a request object to use with this endpoint | |
1124 | * | |
1125 | * Check usb_ep_alloc_request() at "usb_gadget.h" for details | |
1126 | */ | |
1127 | static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) | |
1128 | { | |
1129 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1130 | struct ci13xxx_req *mReq = NULL; | |
aa69a809 | 1131 | |
0f089094 | 1132 | if (ep == NULL) |
aa69a809 | 1133 | return NULL; |
aa69a809 | 1134 | |
aa69a809 DL |
1135 | mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags); |
1136 | if (mReq != NULL) { | |
1137 | INIT_LIST_HEAD(&mReq->queue); | |
1138 | ||
1139 | mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags, | |
1140 | &mReq->dma); | |
1141 | if (mReq->ptr == NULL) { | |
1142 | kfree(mReq); | |
1143 | mReq = NULL; | |
1144 | } | |
1145 | } | |
1146 | ||
aa69a809 DL |
1147 | return (mReq == NULL) ? NULL : &mReq->req; |
1148 | } | |
1149 | ||
1150 | /** | |
1151 | * ep_free_request: frees a request object | |
1152 | * | |
1153 | * Check usb_ep_free_request() at "usb_gadget.h" for details | |
1154 | */ | |
1155 | static void ep_free_request(struct usb_ep *ep, struct usb_request *req) | |
1156 | { | |
1157 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1158 | struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req); | |
1159 | unsigned long flags; | |
1160 | ||
aa69a809 | 1161 | if (ep == NULL || req == NULL) { |
aa69a809 DL |
1162 | return; |
1163 | } else if (!list_empty(&mReq->queue)) { | |
26c696c6 | 1164 | dev_err(mEp->ci->dev, "freeing queued request\n"); |
aa69a809 DL |
1165 | return; |
1166 | } | |
1167 | ||
1168 | spin_lock_irqsave(mEp->lock, flags); | |
1169 | ||
1170 | if (mReq->ptr) | |
1171 | dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma); | |
1172 | kfree(mReq); | |
1173 | ||
aa69a809 DL |
1174 | spin_unlock_irqrestore(mEp->lock, flags); |
1175 | } | |
1176 | ||
1177 | /** | |
1178 | * ep_queue: queues (submits) an I/O request to an endpoint | |
1179 | * | |
1180 | * Check usb_ep_queue()* at usb_gadget.h" for details | |
1181 | */ | |
1182 | static int ep_queue(struct usb_ep *ep, struct usb_request *req, | |
1183 | gfp_t __maybe_unused gfp_flags) | |
1184 | { | |
1185 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
aa69a809 DL |
1186 | int retval = 0; |
1187 | unsigned long flags; | |
1188 | ||
31fb6014 | 1189 | if (ep == NULL || req == NULL || mEp->ep.desc == NULL) |
aa69a809 DL |
1190 | return -EINVAL; |
1191 | ||
1192 | spin_lock_irqsave(mEp->lock, flags); | |
dd064e9d | 1193 | retval = _ep_queue(ep, req, gfp_flags); |
aa69a809 DL |
1194 | spin_unlock_irqrestore(mEp->lock, flags); |
1195 | return retval; | |
1196 | } | |
1197 | ||
1198 | /** | |
1199 | * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint | |
1200 | * | |
1201 | * Check usb_ep_dequeue() at "usb_gadget.h" for details | |
1202 | */ | |
1203 | static int ep_dequeue(struct usb_ep *ep, struct usb_request *req) | |
1204 | { | |
1205 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1206 | struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req); | |
1207 | unsigned long flags; | |
1208 | ||
0e6ca199 | 1209 | if (ep == NULL || req == NULL || mReq->req.status != -EALREADY || |
31fb6014 | 1210 | mEp->ep.desc == NULL || list_empty(&mReq->queue) || |
0e6ca199 | 1211 | list_empty(&mEp->qh.queue)) |
aa69a809 DL |
1212 | return -EINVAL; |
1213 | ||
1214 | spin_lock_irqsave(mEp->lock, flags); | |
1215 | ||
26c696c6 | 1216 | hw_ep_flush(mEp->ci, mEp->num, mEp->dir); |
aa69a809 DL |
1217 | |
1218 | /* pop request */ | |
1219 | list_del_init(&mReq->queue); | |
5e0aa49e | 1220 | |
26c696c6 | 1221 | usb_gadget_unmap_request(&mEp->ci->gadget, req, mEp->dir); |
5e0aa49e | 1222 | |
aa69a809 DL |
1223 | req->status = -ECONNRESET; |
1224 | ||
7c25a826 | 1225 | if (mReq->req.complete != NULL) { |
aa69a809 DL |
1226 | spin_unlock(mEp->lock); |
1227 | mReq->req.complete(&mEp->ep, &mReq->req); | |
1228 | spin_lock(mEp->lock); | |
1229 | } | |
1230 | ||
1231 | spin_unlock_irqrestore(mEp->lock, flags); | |
1232 | return 0; | |
1233 | } | |
1234 | ||
1235 | /** | |
1236 | * ep_set_halt: sets the endpoint halt feature | |
1237 | * | |
1238 | * Check usb_ep_set_halt() at "usb_gadget.h" for details | |
1239 | */ | |
1240 | static int ep_set_halt(struct usb_ep *ep, int value) | |
1241 | { | |
1242 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1243 | int direction, retval = 0; | |
1244 | unsigned long flags; | |
1245 | ||
31fb6014 | 1246 | if (ep == NULL || mEp->ep.desc == NULL) |
aa69a809 DL |
1247 | return -EINVAL; |
1248 | ||
1249 | spin_lock_irqsave(mEp->lock, flags); | |
1250 | ||
1251 | #ifndef STALL_IN | |
1252 | /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */ | |
1253 | if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX && | |
ca9cfea0 | 1254 | !list_empty(&mEp->qh.queue)) { |
aa69a809 DL |
1255 | spin_unlock_irqrestore(mEp->lock, flags); |
1256 | return -EAGAIN; | |
1257 | } | |
1258 | #endif | |
1259 | ||
1260 | direction = mEp->dir; | |
1261 | do { | |
26c696c6 | 1262 | retval |= hw_ep_set_halt(mEp->ci, mEp->num, mEp->dir, value); |
aa69a809 DL |
1263 | |
1264 | if (!value) | |
1265 | mEp->wedge = 0; | |
1266 | ||
1267 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) | |
1268 | mEp->dir = (mEp->dir == TX) ? RX : TX; | |
1269 | ||
1270 | } while (mEp->dir != direction); | |
1271 | ||
1272 | spin_unlock_irqrestore(mEp->lock, flags); | |
1273 | return retval; | |
1274 | } | |
1275 | ||
1276 | /** | |
1277 | * ep_set_wedge: sets the halt feature and ignores clear requests | |
1278 | * | |
1279 | * Check usb_ep_set_wedge() at "usb_gadget.h" for details | |
1280 | */ | |
1281 | static int ep_set_wedge(struct usb_ep *ep) | |
1282 | { | |
1283 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1284 | unsigned long flags; | |
1285 | ||
31fb6014 | 1286 | if (ep == NULL || mEp->ep.desc == NULL) |
aa69a809 DL |
1287 | return -EINVAL; |
1288 | ||
1289 | spin_lock_irqsave(mEp->lock, flags); | |
aa69a809 | 1290 | mEp->wedge = 1; |
aa69a809 DL |
1291 | spin_unlock_irqrestore(mEp->lock, flags); |
1292 | ||
1293 | return usb_ep_set_halt(ep); | |
1294 | } | |
1295 | ||
1296 | /** | |
1297 | * ep_fifo_flush: flushes contents of a fifo | |
1298 | * | |
1299 | * Check usb_ep_fifo_flush() at "usb_gadget.h" for details | |
1300 | */ | |
1301 | static void ep_fifo_flush(struct usb_ep *ep) | |
1302 | { | |
1303 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
1304 | unsigned long flags; | |
1305 | ||
aa69a809 | 1306 | if (ep == NULL) { |
26c696c6 | 1307 | dev_err(mEp->ci->dev, "%02X: -EINVAL\n", _usb_addr(mEp)); |
aa69a809 DL |
1308 | return; |
1309 | } | |
1310 | ||
1311 | spin_lock_irqsave(mEp->lock, flags); | |
1312 | ||
26c696c6 | 1313 | hw_ep_flush(mEp->ci, mEp->num, mEp->dir); |
aa69a809 DL |
1314 | |
1315 | spin_unlock_irqrestore(mEp->lock, flags); | |
1316 | } | |
1317 | ||
1318 | /** | |
1319 | * Endpoint-specific part of the API to the USB controller hardware | |
1320 | * Check "usb_gadget.h" for details | |
1321 | */ | |
1322 | static const struct usb_ep_ops usb_ep_ops = { | |
1323 | .enable = ep_enable, | |
1324 | .disable = ep_disable, | |
1325 | .alloc_request = ep_alloc_request, | |
1326 | .free_request = ep_free_request, | |
1327 | .queue = ep_queue, | |
1328 | .dequeue = ep_dequeue, | |
1329 | .set_halt = ep_set_halt, | |
1330 | .set_wedge = ep_set_wedge, | |
1331 | .fifo_flush = ep_fifo_flush, | |
1332 | }; | |
1333 | ||
1334 | /****************************************************************************** | |
1335 | * GADGET block | |
1336 | *****************************************************************************/ | |
f01ef574 PK |
1337 | static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active) |
1338 | { | |
26c696c6 | 1339 | struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); |
f01ef574 PK |
1340 | unsigned long flags; |
1341 | int gadget_ready = 0; | |
1342 | ||
26c696c6 | 1343 | if (!(ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS)) |
f01ef574 PK |
1344 | return -EOPNOTSUPP; |
1345 | ||
26c696c6 RZ |
1346 | spin_lock_irqsave(&ci->lock, flags); |
1347 | ci->vbus_active = is_active; | |
1348 | if (ci->driver) | |
f01ef574 | 1349 | gadget_ready = 1; |
26c696c6 | 1350 | spin_unlock_irqrestore(&ci->lock, flags); |
f01ef574 PK |
1351 | |
1352 | if (gadget_ready) { | |
1353 | if (is_active) { | |
c036019e | 1354 | pm_runtime_get_sync(&_gadget->dev); |
26c696c6 RZ |
1355 | hw_device_reset(ci, USBMODE_CM_DC); |
1356 | hw_device_state(ci, ci->ep0out->qh.dma); | |
f01ef574 | 1357 | } else { |
26c696c6 RZ |
1358 | hw_device_state(ci, 0); |
1359 | if (ci->platdata->notify_event) | |
1360 | ci->platdata->notify_event(ci, | |
f01ef574 | 1361 | CI13XXX_CONTROLLER_STOPPED_EVENT); |
26c696c6 | 1362 | _gadget_stop_activity(&ci->gadget); |
c036019e | 1363 | pm_runtime_put_sync(&_gadget->dev); |
f01ef574 PK |
1364 | } |
1365 | } | |
1366 | ||
1367 | return 0; | |
1368 | } | |
1369 | ||
e2b61c1d PK |
1370 | static int ci13xxx_wakeup(struct usb_gadget *_gadget) |
1371 | { | |
26c696c6 | 1372 | struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); |
e2b61c1d PK |
1373 | unsigned long flags; |
1374 | int ret = 0; | |
1375 | ||
26c696c6 RZ |
1376 | spin_lock_irqsave(&ci->lock, flags); |
1377 | if (!ci->remote_wakeup) { | |
e2b61c1d | 1378 | ret = -EOPNOTSUPP; |
e2b61c1d PK |
1379 | goto out; |
1380 | } | |
26c696c6 | 1381 | if (!hw_read(ci, OP_PORTSC, PORTSC_SUSP)) { |
e2b61c1d | 1382 | ret = -EINVAL; |
e2b61c1d PK |
1383 | goto out; |
1384 | } | |
26c696c6 | 1385 | hw_write(ci, OP_PORTSC, PORTSC_FPR, PORTSC_FPR); |
e2b61c1d | 1386 | out: |
26c696c6 | 1387 | spin_unlock_irqrestore(&ci->lock, flags); |
e2b61c1d PK |
1388 | return ret; |
1389 | } | |
1390 | ||
d860852e PK |
1391 | static int ci13xxx_vbus_draw(struct usb_gadget *_gadget, unsigned mA) |
1392 | { | |
26c696c6 | 1393 | struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); |
d860852e | 1394 | |
26c696c6 RZ |
1395 | if (ci->transceiver) |
1396 | return usb_phy_set_power(ci->transceiver, mA); | |
d860852e PK |
1397 | return -ENOTSUPP; |
1398 | } | |
1399 | ||
c0a48e6c MG |
1400 | /* Change Data+ pullup status |
1401 | * this func is used by usb_gadget_connect/disconnet | |
1402 | */ | |
1403 | static int ci13xxx_pullup(struct usb_gadget *_gadget, int is_on) | |
1404 | { | |
1405 | struct ci13xxx *ci = container_of(_gadget, struct ci13xxx, gadget); | |
1406 | ||
1407 | if (is_on) | |
1408 | hw_write(ci, OP_USBCMD, USBCMD_RS, USBCMD_RS); | |
1409 | else | |
1410 | hw_write(ci, OP_USBCMD, USBCMD_RS, 0); | |
1411 | ||
1412 | return 0; | |
1413 | } | |
1414 | ||
1f339d84 AS |
1415 | static int ci13xxx_start(struct usb_gadget *gadget, |
1416 | struct usb_gadget_driver *driver); | |
1417 | static int ci13xxx_stop(struct usb_gadget *gadget, | |
1418 | struct usb_gadget_driver *driver); | |
aa69a809 DL |
1419 | /** |
1420 | * Device operations part of the API to the USB controller hardware, | |
1421 | * which don't involve endpoints (or i/o) | |
1422 | * Check "usb_gadget.h" for details | |
1423 | */ | |
f01ef574 PK |
1424 | static const struct usb_gadget_ops usb_gadget_ops = { |
1425 | .vbus_session = ci13xxx_vbus_session, | |
e2b61c1d | 1426 | .wakeup = ci13xxx_wakeup, |
c0a48e6c | 1427 | .pullup = ci13xxx_pullup, |
d860852e | 1428 | .vbus_draw = ci13xxx_vbus_draw, |
1f339d84 AS |
1429 | .udc_start = ci13xxx_start, |
1430 | .udc_stop = ci13xxx_stop, | |
f01ef574 | 1431 | }; |
aa69a809 | 1432 | |
26c696c6 | 1433 | static int init_eps(struct ci13xxx *ci) |
aa69a809 | 1434 | { |
790c2d52 | 1435 | int retval = 0, i, j; |
aa69a809 | 1436 | |
26c696c6 | 1437 | for (i = 0; i < ci->hw_ep_max/2; i++) |
ca9cfea0 | 1438 | for (j = RX; j <= TX; j++) { |
26c696c6 RZ |
1439 | int k = i + j * ci->hw_ep_max/2; |
1440 | struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[k]; | |
aa69a809 | 1441 | |
ca9cfea0 PK |
1442 | scnprintf(mEp->name, sizeof(mEp->name), "ep%i%s", i, |
1443 | (j == TX) ? "in" : "out"); | |
aa69a809 | 1444 | |
26c696c6 RZ |
1445 | mEp->ci = ci; |
1446 | mEp->lock = &ci->lock; | |
1447 | mEp->td_pool = ci->td_pool; | |
aa69a809 | 1448 | |
ca9cfea0 PK |
1449 | mEp->ep.name = mEp->name; |
1450 | mEp->ep.ops = &usb_ep_ops; | |
7f67c38b MG |
1451 | /* |
1452 | * for ep0: maxP defined in desc, for other | |
1453 | * eps, maxP is set by epautoconfig() called | |
1454 | * by gadget layer | |
1455 | */ | |
1456 | mEp->ep.maxpacket = (unsigned short)~0; | |
aa69a809 | 1457 | |
ca9cfea0 | 1458 | INIT_LIST_HEAD(&mEp->qh.queue); |
26c696c6 | 1459 | mEp->qh.ptr = dma_pool_alloc(ci->qh_pool, GFP_KERNEL, |
790c2d52 | 1460 | &mEp->qh.dma); |
ca9cfea0 | 1461 | if (mEp->qh.ptr == NULL) |
aa69a809 DL |
1462 | retval = -ENOMEM; |
1463 | else | |
ca9cfea0 PK |
1464 | memset(mEp->qh.ptr, 0, sizeof(*mEp->qh.ptr)); |
1465 | ||
d36ade60 AS |
1466 | /* |
1467 | * set up shorthands for ep0 out and in endpoints, | |
1468 | * don't add to gadget's ep_list | |
1469 | */ | |
1470 | if (i == 0) { | |
1471 | if (j == RX) | |
26c696c6 | 1472 | ci->ep0out = mEp; |
d36ade60 | 1473 | else |
26c696c6 | 1474 | ci->ep0in = mEp; |
d36ade60 | 1475 | |
7f67c38b | 1476 | mEp->ep.maxpacket = CTRL_PAYLOAD_MAX; |
ca9cfea0 | 1477 | continue; |
d36ade60 | 1478 | } |
ca9cfea0 | 1479 | |
26c696c6 | 1480 | list_add_tail(&mEp->ep.ep_list, &ci->gadget.ep_list); |
ca9cfea0 | 1481 | } |
790c2d52 AS |
1482 | |
1483 | return retval; | |
1484 | } | |
1485 | ||
ad6b1b97 MKB |
1486 | static void destroy_eps(struct ci13xxx *ci) |
1487 | { | |
1488 | int i; | |
1489 | ||
1490 | for (i = 0; i < ci->hw_ep_max; i++) { | |
1491 | struct ci13xxx_ep *mEp = &ci->ci13xxx_ep[i]; | |
1492 | ||
1493 | dma_pool_free(ci->qh_pool, mEp->qh.ptr, mEp->qh.dma); | |
1494 | } | |
1495 | } | |
1496 | ||
790c2d52 AS |
1497 | /** |
1498 | * ci13xxx_start: register a gadget driver | |
1f339d84 | 1499 | * @gadget: our gadget |
790c2d52 | 1500 | * @driver: the driver being registered |
790c2d52 | 1501 | * |
790c2d52 AS |
1502 | * Interrupts are enabled here. |
1503 | */ | |
1f339d84 AS |
1504 | static int ci13xxx_start(struct usb_gadget *gadget, |
1505 | struct usb_gadget_driver *driver) | |
790c2d52 | 1506 | { |
26c696c6 | 1507 | struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget); |
790c2d52 | 1508 | unsigned long flags; |
790c2d52 AS |
1509 | int retval = -ENOMEM; |
1510 | ||
1f339d84 | 1511 | if (driver->disconnect == NULL) |
790c2d52 | 1512 | return -EINVAL; |
790c2d52 | 1513 | |
790c2d52 | 1514 | |
26c696c6 RZ |
1515 | ci->ep0out->ep.desc = &ctrl_endpt_out_desc; |
1516 | retval = usb_ep_enable(&ci->ep0out->ep); | |
ac1aa6a2 A |
1517 | if (retval) |
1518 | return retval; | |
877c1f54 | 1519 | |
26c696c6 RZ |
1520 | ci->ep0in->ep.desc = &ctrl_endpt_in_desc; |
1521 | retval = usb_ep_enable(&ci->ep0in->ep); | |
ac1aa6a2 A |
1522 | if (retval) |
1523 | return retval; | |
26c696c6 RZ |
1524 | spin_lock_irqsave(&ci->lock, flags); |
1525 | ||
1526 | ci->driver = driver; | |
1527 | pm_runtime_get_sync(&ci->gadget.dev); | |
1528 | if (ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) { | |
1529 | if (ci->vbus_active) { | |
571bb7ab | 1530 | if (ci->platdata->flags & CI13XXX_REGS_SHARED) |
26c696c6 | 1531 | hw_device_reset(ci, USBMODE_CM_DC); |
f01ef574 | 1532 | } else { |
26c696c6 | 1533 | pm_runtime_put_sync(&ci->gadget.dev); |
f01ef574 PK |
1534 | goto done; |
1535 | } | |
1536 | } | |
1537 | ||
26c696c6 | 1538 | retval = hw_device_state(ci, ci->ep0out->qh.dma); |
c036019e | 1539 | if (retval) |
26c696c6 | 1540 | pm_runtime_put_sync(&ci->gadget.dev); |
aa69a809 DL |
1541 | |
1542 | done: | |
26c696c6 | 1543 | spin_unlock_irqrestore(&ci->lock, flags); |
aa69a809 DL |
1544 | return retval; |
1545 | } | |
aa69a809 DL |
1546 | |
1547 | /** | |
0f91349b | 1548 | * ci13xxx_stop: unregister a gadget driver |
aa69a809 | 1549 | */ |
1f339d84 AS |
1550 | static int ci13xxx_stop(struct usb_gadget *gadget, |
1551 | struct usb_gadget_driver *driver) | |
aa69a809 | 1552 | { |
26c696c6 | 1553 | struct ci13xxx *ci = container_of(gadget, struct ci13xxx, gadget); |
1f339d84 | 1554 | unsigned long flags; |
aa69a809 | 1555 | |
26c696c6 | 1556 | spin_lock_irqsave(&ci->lock, flags); |
aa69a809 | 1557 | |
26c696c6 RZ |
1558 | if (!(ci->platdata->flags & CI13XXX_PULLUP_ON_VBUS) || |
1559 | ci->vbus_active) { | |
1560 | hw_device_state(ci, 0); | |
1561 | if (ci->platdata->notify_event) | |
1562 | ci->platdata->notify_event(ci, | |
f01ef574 | 1563 | CI13XXX_CONTROLLER_STOPPED_EVENT); |
26c696c6 RZ |
1564 | ci->driver = NULL; |
1565 | spin_unlock_irqrestore(&ci->lock, flags); | |
1566 | _gadget_stop_activity(&ci->gadget); | |
1567 | spin_lock_irqsave(&ci->lock, flags); | |
1568 | pm_runtime_put(&ci->gadget.dev); | |
f01ef574 | 1569 | } |
aa69a809 | 1570 | |
26c696c6 | 1571 | spin_unlock_irqrestore(&ci->lock, flags); |
aa69a809 | 1572 | |
aa69a809 DL |
1573 | return 0; |
1574 | } | |
aa69a809 DL |
1575 | |
1576 | /****************************************************************************** | |
1577 | * BUS block | |
1578 | *****************************************************************************/ | |
1579 | /** | |
26c696c6 | 1580 | * udc_irq: ci interrupt handler |
aa69a809 DL |
1581 | * |
1582 | * This function returns IRQ_HANDLED if the IRQ has been handled | |
1583 | * It locks access to registers | |
1584 | */ | |
26c696c6 | 1585 | static irqreturn_t udc_irq(struct ci13xxx *ci) |
aa69a809 | 1586 | { |
aa69a809 DL |
1587 | irqreturn_t retval; |
1588 | u32 intr; | |
1589 | ||
26c696c6 | 1590 | if (ci == NULL) |
aa69a809 | 1591 | return IRQ_HANDLED; |
aa69a809 | 1592 | |
26c696c6 | 1593 | spin_lock(&ci->lock); |
f01ef574 | 1594 | |
26c696c6 RZ |
1595 | if (ci->platdata->flags & CI13XXX_REGS_SHARED) { |
1596 | if (hw_read(ci, OP_USBMODE, USBMODE_CM) != | |
758fc986 | 1597 | USBMODE_CM_DC) { |
26c696c6 | 1598 | spin_unlock(&ci->lock); |
f01ef574 PK |
1599 | return IRQ_NONE; |
1600 | } | |
1601 | } | |
26c696c6 | 1602 | intr = hw_test_and_clear_intr_active(ci); |
aa69a809 | 1603 | |
e443b333 | 1604 | if (intr) { |
aa69a809 | 1605 | /* order defines priority - do NOT change it */ |
e443b333 | 1606 | if (USBi_URI & intr) |
26c696c6 | 1607 | isr_reset_handler(ci); |
e443b333 | 1608 | |
aa69a809 | 1609 | if (USBi_PCI & intr) { |
26c696c6 | 1610 | ci->gadget.speed = hw_port_is_high_speed(ci) ? |
aa69a809 | 1611 | USB_SPEED_HIGH : USB_SPEED_FULL; |
26c696c6 RZ |
1612 | if (ci->suspended && ci->driver->resume) { |
1613 | spin_unlock(&ci->lock); | |
1614 | ci->driver->resume(&ci->gadget); | |
1615 | spin_lock(&ci->lock); | |
1616 | ci->suspended = 0; | |
e2b61c1d | 1617 | } |
aa69a809 | 1618 | } |
e443b333 AS |
1619 | |
1620 | if (USBi_UI & intr) | |
26c696c6 | 1621 | isr_tr_complete_handler(ci); |
e443b333 | 1622 | |
e2b61c1d | 1623 | if (USBi_SLI & intr) { |
26c696c6 RZ |
1624 | if (ci->gadget.speed != USB_SPEED_UNKNOWN && |
1625 | ci->driver->suspend) { | |
1626 | ci->suspended = 1; | |
1627 | spin_unlock(&ci->lock); | |
1628 | ci->driver->suspend(&ci->gadget); | |
1629 | spin_lock(&ci->lock); | |
e2b61c1d | 1630 | } |
e2b61c1d | 1631 | } |
aa69a809 DL |
1632 | retval = IRQ_HANDLED; |
1633 | } else { | |
aa69a809 DL |
1634 | retval = IRQ_NONE; |
1635 | } | |
26c696c6 | 1636 | spin_unlock(&ci->lock); |
aa69a809 DL |
1637 | |
1638 | return retval; | |
1639 | } | |
1640 | ||
aa69a809 | 1641 | /** |
5f36e231 | 1642 | * udc_start: initialize gadget role |
26c696c6 | 1643 | * @ci: chipidea controller |
aa69a809 | 1644 | */ |
26c696c6 | 1645 | static int udc_start(struct ci13xxx *ci) |
aa69a809 | 1646 | { |
26c696c6 | 1647 | struct device *dev = ci->dev; |
aa69a809 DL |
1648 | int retval = 0; |
1649 | ||
26c696c6 | 1650 | spin_lock_init(&ci->lock); |
aa69a809 | 1651 | |
26c696c6 RZ |
1652 | ci->gadget.ops = &usb_gadget_ops; |
1653 | ci->gadget.speed = USB_SPEED_UNKNOWN; | |
1654 | ci->gadget.max_speed = USB_SPEED_HIGH; | |
1655 | ci->gadget.is_otg = 0; | |
1656 | ci->gadget.name = ci->platdata->name; | |
aa69a809 | 1657 | |
26c696c6 | 1658 | INIT_LIST_HEAD(&ci->gadget.ep_list); |
aa69a809 | 1659 | |
790c2d52 | 1660 | /* alloc resources */ |
26c696c6 | 1661 | ci->qh_pool = dma_pool_create("ci13xxx_qh", dev, |
790c2d52 AS |
1662 | sizeof(struct ci13xxx_qh), |
1663 | 64, CI13XXX_PAGE_SIZE); | |
26c696c6 | 1664 | if (ci->qh_pool == NULL) |
5f36e231 | 1665 | return -ENOMEM; |
790c2d52 | 1666 | |
26c696c6 | 1667 | ci->td_pool = dma_pool_create("ci13xxx_td", dev, |
790c2d52 AS |
1668 | sizeof(struct ci13xxx_td), |
1669 | 64, CI13XXX_PAGE_SIZE); | |
26c696c6 | 1670 | if (ci->td_pool == NULL) { |
790c2d52 AS |
1671 | retval = -ENOMEM; |
1672 | goto free_qh_pool; | |
1673 | } | |
1674 | ||
26c696c6 | 1675 | retval = init_eps(ci); |
790c2d52 AS |
1676 | if (retval) |
1677 | goto free_pools; | |
1678 | ||
26c696c6 | 1679 | ci->gadget.ep0 = &ci->ep0in->ep; |
f01ef574 | 1680 | |
d343f4e8 | 1681 | if (ci->global_phy) { |
a2c3d690 | 1682 | ci->transceiver = usb_get_phy(USB_PHY_TYPE_USB2); |
d343f4e8 AS |
1683 | if (IS_ERR(ci->transceiver)) |
1684 | ci->transceiver = NULL; | |
1685 | } | |
f01ef574 | 1686 | |
26c696c6 RZ |
1687 | if (ci->platdata->flags & CI13XXX_REQUIRE_TRANSCEIVER) { |
1688 | if (ci->transceiver == NULL) { | |
f01ef574 | 1689 | retval = -ENODEV; |
ad6b1b97 | 1690 | goto destroy_eps; |
f01ef574 PK |
1691 | } |
1692 | } | |
1693 | ||
26c696c6 RZ |
1694 | if (!(ci->platdata->flags & CI13XXX_REGS_SHARED)) { |
1695 | retval = hw_device_reset(ci, USBMODE_CM_DC); | |
f01ef574 PK |
1696 | if (retval) |
1697 | goto put_transceiver; | |
1698 | } | |
1699 | ||
d343f4e8 | 1700 | if (ci->transceiver) { |
26c696c6 RZ |
1701 | retval = otg_set_peripheral(ci->transceiver->otg, |
1702 | &ci->gadget); | |
f01ef574 | 1703 | if (retval) |
64dc9e2e | 1704 | goto put_transceiver; |
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: |
d343f4e8 | 1717 | if (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 | put_transceiver: |
d343f4e8 | 1725 | if (ci->transceiver && ci->global_phy) |
26c696c6 | 1726 | usb_put_phy(ci->transceiver); |
ad6b1b97 MKB |
1727 | destroy_eps: |
1728 | destroy_eps(ci); | |
790c2d52 | 1729 | free_pools: |
26c696c6 | 1730 | dma_pool_destroy(ci->td_pool); |
790c2d52 | 1731 | free_qh_pool: |
26c696c6 | 1732 | dma_pool_destroy(ci->qh_pool); |
aa69a809 DL |
1733 | return retval; |
1734 | } | |
1735 | ||
1736 | /** | |
1737 | * udc_remove: parent remove must call this to remove UDC | |
1738 | * | |
1739 | * No interrupts active, the IRQ has been released | |
1740 | */ | |
26c696c6 | 1741 | static void udc_stop(struct ci13xxx *ci) |
aa69a809 | 1742 | { |
26c696c6 | 1743 | if (ci == NULL) |
aa69a809 | 1744 | return; |
0f089094 | 1745 | |
26c696c6 | 1746 | usb_del_gadget_udc(&ci->gadget); |
aa69a809 | 1747 | |
ad6b1b97 | 1748 | destroy_eps(ci); |
790c2d52 | 1749 | |
26c696c6 RZ |
1750 | dma_pool_destroy(ci->td_pool); |
1751 | dma_pool_destroy(ci->qh_pool); | |
790c2d52 | 1752 | |
d343f4e8 | 1753 | if (ci->transceiver) { |
26c696c6 | 1754 | otg_set_peripheral(ci->transceiver->otg, NULL); |
a2c3d690 RZ |
1755 | if (ci->global_phy) |
1756 | usb_put_phy(ci->transceiver); | |
f01ef574 | 1757 | } |
5f36e231 | 1758 | /* my kobject is dynamic, I swear! */ |
26c696c6 | 1759 | memset(&ci->gadget, 0, sizeof(ci->gadget)); |
5f36e231 AS |
1760 | } |
1761 | ||
1762 | /** | |
1763 | * ci_hdrc_gadget_init - initialize device related bits | |
1764 | * ci: the controller | |
1765 | * | |
1766 | * This function enables the gadget role, if the device is "device capable". | |
1767 | */ | |
1768 | int ci_hdrc_gadget_init(struct ci13xxx *ci) | |
1769 | { | |
1770 | struct ci_role_driver *rdrv; | |
1771 | ||
1772 | if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DC)) | |
1773 | return -ENXIO; | |
1774 | ||
1775 | rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL); | |
1776 | if (!rdrv) | |
1777 | return -ENOMEM; | |
1778 | ||
1779 | rdrv->start = udc_start; | |
1780 | rdrv->stop = udc_stop; | |
1781 | rdrv->irq = udc_irq; | |
1782 | rdrv->name = "gadget"; | |
1783 | ci->roles[CI_ROLE_GADGET] = rdrv; | |
aa69a809 | 1784 | |
5f36e231 | 1785 | return 0; |
aa69a809 | 1786 | } |