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aa69a809 DL |
1 | /* |
2 | * ci13xxx_udc.c - MIPS USB IP core family device controller | |
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 | ||
13 | /* | |
14 | * Description: MIPS USB IP core family device controller | |
15 | * Currently it only supports IP part number CI13412 | |
16 | * | |
17 | * This driver is composed of several blocks: | |
18 | * - HW: hardware interface | |
19 | * - DBG: debug facilities (optional) | |
20 | * - UTIL: utilities | |
21 | * - ISR: interrupts handling | |
22 | * - ENDPT: endpoint operations (Gadget API) | |
23 | * - GADGET: gadget operations (Gadget API) | |
24 | * - BUS: bus glue code, bus abstraction layer | |
aa69a809 DL |
25 | * |
26 | * Compile Options | |
27 | * - CONFIG_USB_GADGET_DEBUG_FILES: enable debug facilities | |
28 | * - STALL_IN: non-empty bulk-in pipes cannot be halted | |
29 | * if defined mass storage compliance succeeds but with warnings | |
30 | * => case 4: Hi > Dn | |
31 | * => case 5: Hi > Di | |
32 | * => case 8: Hi <> Do | |
33 | * if undefined usbtest 13 fails | |
34 | * - TRACE: enable function tracing (depends on DEBUG) | |
35 | * | |
36 | * Main Features | |
37 | * - Chapter 9 & Mass Storage Compliance with Gadget File Storage | |
38 | * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined) | |
39 | * - Normal & LPM support | |
40 | * | |
41 | * USBTEST Report | |
42 | * - OK: 0-12, 13 (STALL_IN defined) & 14 | |
43 | * - Not Supported: 15 & 16 (ISO) | |
44 | * | |
45 | * TODO List | |
46 | * - OTG | |
47 | * - Isochronous & Interrupt Traffic | |
48 | * - Handle requests which spawns into several TDs | |
49 | * - GET_STATUS(device) - always reports 0 | |
50 | * - Gadget API (majority of optional features) | |
51 | * - Suspend & Remote Wakeup | |
52 | */ | |
36825a2d | 53 | #include <linux/delay.h> |
aa69a809 DL |
54 | #include <linux/device.h> |
55 | #include <linux/dmapool.h> | |
56 | #include <linux/dma-mapping.h> | |
57 | #include <linux/init.h> | |
62bb84ed AS |
58 | #include <linux/platform_device.h> |
59 | #include <linux/module.h> | |
aa69a809 | 60 | #include <linux/interrupt.h> |
aa69a809 DL |
61 | #include <linux/io.h> |
62 | #include <linux/irq.h> | |
63 | #include <linux/kernel.h> | |
5a0e3ad6 | 64 | #include <linux/slab.h> |
c036019e | 65 | #include <linux/pm_runtime.h> |
aa69a809 DL |
66 | #include <linux/usb/ch9.h> |
67 | #include <linux/usb/gadget.h> | |
f01ef574 | 68 | #include <linux/usb/otg.h> |
aa69a809 DL |
69 | |
70 | #include "ci13xxx_udc.h" | |
71 | ||
aa69a809 DL |
72 | /****************************************************************************** |
73 | * DEFINE | |
74 | *****************************************************************************/ | |
954aad8c MG |
75 | |
76 | #define DMA_ADDR_INVALID (~(dma_addr_t)0) | |
77 | ||
aa69a809 DL |
78 | /* control endpoint description */ |
79 | static const struct usb_endpoint_descriptor | |
ca9cfea0 | 80 | ctrl_endpt_out_desc = { |
aa69a809 DL |
81 | .bLength = USB_DT_ENDPOINT_SIZE, |
82 | .bDescriptorType = USB_DT_ENDPOINT, | |
83 | ||
ca9cfea0 PK |
84 | .bEndpointAddress = USB_DIR_OUT, |
85 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, | |
86 | .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX), | |
87 | }; | |
88 | ||
89 | static const struct usb_endpoint_descriptor | |
90 | ctrl_endpt_in_desc = { | |
91 | .bLength = USB_DT_ENDPOINT_SIZE, | |
92 | .bDescriptorType = USB_DT_ENDPOINT, | |
93 | ||
94 | .bEndpointAddress = USB_DIR_IN, | |
aa69a809 DL |
95 | .bmAttributes = USB_ENDPOINT_XFER_CONTROL, |
96 | .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX), | |
97 | }; | |
98 | ||
aa69a809 DL |
99 | /* Interrupt statistics */ |
100 | #define ISR_MASK 0x1F | |
101 | static struct { | |
102 | u32 test; | |
103 | u32 ui; | |
104 | u32 uei; | |
105 | u32 pci; | |
106 | u32 uri; | |
107 | u32 sli; | |
108 | u32 none; | |
109 | struct { | |
110 | u32 cnt; | |
111 | u32 buf[ISR_MASK+1]; | |
112 | u32 idx; | |
113 | } hndl; | |
114 | } isr_statistics; | |
115 | ||
116 | /** | |
117 | * ffs_nr: find first (least significant) bit set | |
118 | * @x: the word to search | |
119 | * | |
120 | * This function returns bit number (instead of position) | |
121 | */ | |
122 | static int ffs_nr(u32 x) | |
123 | { | |
124 | int n = ffs(x); | |
125 | ||
126 | return n ? n-1 : 32; | |
127 | } | |
128 | ||
129 | /****************************************************************************** | |
130 | * HW block | |
131 | *****************************************************************************/ | |
aa69a809 | 132 | |
f01ef574 PK |
133 | /* MSM specific */ |
134 | #define ABS_AHBBURST (0x0090UL) | |
135 | #define ABS_AHBMODE (0x0098UL) | |
aa69a809 | 136 | /* UDC register map */ |
262c1632 AS |
137 | static uintptr_t ci_regs_nolpm[] = { |
138 | [CAP_CAPLENGTH] = 0x000UL, | |
139 | [CAP_HCCPARAMS] = 0x008UL, | |
140 | [CAP_DCCPARAMS] = 0x024UL, | |
141 | [CAP_TESTMODE] = 0x038UL, | |
142 | [OP_USBCMD] = 0x000UL, | |
143 | [OP_USBSTS] = 0x004UL, | |
144 | [OP_USBINTR] = 0x008UL, | |
145 | [OP_DEVICEADDR] = 0x014UL, | |
146 | [OP_ENDPTLISTADDR] = 0x018UL, | |
147 | [OP_PORTSC] = 0x044UL, | |
148 | [OP_DEVLC] = 0x084UL, | |
149 | [OP_USBMODE] = 0x068UL, | |
150 | [OP_ENDPTSETUPSTAT] = 0x06CUL, | |
151 | [OP_ENDPTPRIME] = 0x070UL, | |
152 | [OP_ENDPTFLUSH] = 0x074UL, | |
153 | [OP_ENDPTSTAT] = 0x078UL, | |
154 | [OP_ENDPTCOMPLETE] = 0x07CUL, | |
155 | [OP_ENDPTCTRL] = 0x080UL, | |
156 | }; | |
157 | ||
158 | static uintptr_t ci_regs_lpm[] = { | |
159 | [CAP_CAPLENGTH] = 0x000UL, | |
160 | [CAP_HCCPARAMS] = 0x008UL, | |
161 | [CAP_DCCPARAMS] = 0x024UL, | |
162 | [CAP_TESTMODE] = 0x0FCUL, | |
163 | [OP_USBCMD] = 0x000UL, | |
164 | [OP_USBSTS] = 0x004UL, | |
165 | [OP_USBINTR] = 0x008UL, | |
166 | [OP_DEVICEADDR] = 0x014UL, | |
167 | [OP_ENDPTLISTADDR] = 0x018UL, | |
168 | [OP_PORTSC] = 0x044UL, | |
169 | [OP_DEVLC] = 0x084UL, | |
170 | [OP_USBMODE] = 0x0C8UL, | |
171 | [OP_ENDPTSETUPSTAT] = 0x0D8UL, | |
172 | [OP_ENDPTPRIME] = 0x0DCUL, | |
173 | [OP_ENDPTFLUSH] = 0x0E0UL, | |
174 | [OP_ENDPTSTAT] = 0x0E4UL, | |
175 | [OP_ENDPTCOMPLETE] = 0x0E8UL, | |
176 | [OP_ENDPTCTRL] = 0x0ECUL, | |
177 | }; | |
178 | ||
179 | static int hw_alloc_regmap(struct ci13xxx *udc, bool is_lpm) | |
180 | { | |
181 | int i; | |
182 | ||
183 | kfree(udc->hw_bank.regmap); | |
184 | ||
185 | udc->hw_bank.regmap = kzalloc((OP_LAST + 1) * sizeof(void *), | |
186 | GFP_KERNEL); | |
187 | if (!udc->hw_bank.regmap) | |
188 | return -ENOMEM; | |
189 | ||
190 | for (i = 0; i < OP_ENDPTCTRL; i++) | |
191 | udc->hw_bank.regmap[i] = | |
192 | (i <= CAP_LAST ? udc->hw_bank.cap : udc->hw_bank.op) + | |
193 | (is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]); | |
194 | ||
195 | for (; i <= OP_LAST; i++) | |
196 | udc->hw_bank.regmap[i] = udc->hw_bank.op + | |
197 | 4 * (i - OP_ENDPTCTRL) + | |
198 | (is_lpm | |
199 | ? ci_regs_lpm[OP_ENDPTCTRL] | |
200 | : ci_regs_nolpm[OP_ENDPTCTRL]); | |
201 | ||
202 | return 0; | |
203 | } | |
aa69a809 DL |
204 | |
205 | /** | |
206 | * hw_ep_bit: calculates the bit number | |
207 | * @num: endpoint number | |
208 | * @dir: endpoint direction | |
209 | * | |
210 | * This function returns bit number | |
211 | */ | |
212 | static inline int hw_ep_bit(int num, int dir) | |
213 | { | |
214 | return num + (dir ? 16 : 0); | |
215 | } | |
216 | ||
d3595d13 | 217 | static int ep_to_bit(struct ci13xxx *udc, int n) |
dd39c358 | 218 | { |
d3595d13 | 219 | int fill = 16 - udc->hw_ep_max / 2; |
dd39c358 | 220 | |
d3595d13 | 221 | if (n >= udc->hw_ep_max / 2) |
dd39c358 MKB |
222 | n += fill; |
223 | ||
224 | return n; | |
225 | } | |
226 | ||
aa69a809 | 227 | /** |
262c1632 AS |
228 | * hw_read: reads from a hw register |
229 | * @reg: register index | |
aa69a809 DL |
230 | * @mask: bitfield mask |
231 | * | |
262c1632 | 232 | * This function returns register contents |
aa69a809 | 233 | */ |
262c1632 | 234 | static u32 hw_read(struct ci13xxx *udc, enum ci13xxx_regs reg, u32 mask) |
aa69a809 | 235 | { |
262c1632 | 236 | return ioread32(udc->hw_bank.regmap[reg]) & mask; |
aa69a809 DL |
237 | } |
238 | ||
239 | /** | |
262c1632 AS |
240 | * hw_write: writes to a hw register |
241 | * @reg: register index | |
aa69a809 | 242 | * @mask: bitfield mask |
262c1632 | 243 | * @data: new value |
aa69a809 | 244 | */ |
262c1632 AS |
245 | static void hw_write(struct ci13xxx *udc, enum ci13xxx_regs reg, u32 mask, |
246 | u32 data) | |
aa69a809 | 247 | { |
262c1632 AS |
248 | if (~mask) |
249 | data = (ioread32(udc->hw_bank.regmap[reg]) & ~mask) | |
250 | | (data & mask); | |
251 | ||
252 | iowrite32(data, udc->hw_bank.regmap[reg]); | |
aa69a809 DL |
253 | } |
254 | ||
255 | /** | |
262c1632 AS |
256 | * hw_test_and_clear: tests & clears a hw register |
257 | * @reg: register index | |
aa69a809 DL |
258 | * @mask: bitfield mask |
259 | * | |
262c1632 | 260 | * This function returns register contents |
aa69a809 | 261 | */ |
262c1632 AS |
262 | static u32 hw_test_and_clear(struct ci13xxx *udc, enum ci13xxx_regs reg, |
263 | u32 mask) | |
aa69a809 | 264 | { |
262c1632 | 265 | u32 val = ioread32(udc->hw_bank.regmap[reg]) & mask; |
aa69a809 | 266 | |
262c1632 AS |
267 | iowrite32(val, udc->hw_bank.regmap[reg]); |
268 | return val; | |
aa69a809 DL |
269 | } |
270 | ||
271 | /** | |
262c1632 AS |
272 | * hw_test_and_write: tests & writes a hw register |
273 | * @reg: register index | |
aa69a809 | 274 | * @mask: bitfield mask |
262c1632 | 275 | * @data: new value |
aa69a809 | 276 | * |
262c1632 | 277 | * This function returns register contents |
aa69a809 | 278 | */ |
262c1632 AS |
279 | static u32 hw_test_and_write(struct ci13xxx *udc, enum ci13xxx_regs reg, |
280 | u32 mask, u32 data) | |
aa69a809 | 281 | { |
262c1632 | 282 | u32 val = hw_read(udc, reg, ~0); |
aa69a809 | 283 | |
262c1632 AS |
284 | hw_write(udc, reg, mask, data); |
285 | return (val & mask) >> ffs_nr(mask); | |
aa69a809 DL |
286 | } |
287 | ||
d3595d13 AS |
288 | static int hw_device_init(struct ci13xxx *udc, void __iomem *base, |
289 | uintptr_t cap_offset) | |
aa69a809 DL |
290 | { |
291 | u32 reg; | |
292 | ||
293 | /* bank is a module variable */ | |
d3595d13 | 294 | udc->hw_bank.abs = base; |
aa69a809 | 295 | |
d3595d13 AS |
296 | udc->hw_bank.cap = udc->hw_bank.abs; |
297 | udc->hw_bank.cap += cap_offset; | |
298 | udc->hw_bank.op = udc->hw_bank.cap + ioread8(udc->hw_bank.cap); | |
aa69a809 | 299 | |
262c1632 AS |
300 | hw_alloc_regmap(udc, false); |
301 | reg = hw_read(udc, CAP_HCCPARAMS, HCCPARAMS_LEN) >> | |
f9df8395 | 302 | ffs_nr(HCCPARAMS_LEN); |
d3595d13 | 303 | udc->hw_bank.lpm = reg; |
262c1632 | 304 | hw_alloc_regmap(udc, !!reg); |
d3595d13 AS |
305 | udc->hw_bank.size = udc->hw_bank.op - udc->hw_bank.abs; |
306 | udc->hw_bank.size += OP_LAST; | |
307 | udc->hw_bank.size /= sizeof(u32); | |
aa69a809 | 308 | |
262c1632 | 309 | reg = hw_read(udc, CAP_DCCPARAMS, DCCPARAMS_DEN) >> |
f9df8395 | 310 | ffs_nr(DCCPARAMS_DEN); |
d3595d13 | 311 | udc->hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */ |
f01ef574 | 312 | |
d3595d13 | 313 | if (udc->hw_ep_max == 0 || udc->hw_ep_max > ENDPT_MAX) |
ca9cfea0 | 314 | return -ENODEV; |
f01ef574 | 315 | |
ce9d6fbc AS |
316 | dev_dbg(udc->dev, "ChipIdea UDC found, lpm: %d; cap: %p op: %p\n", |
317 | udc->hw_bank.lpm, udc->hw_bank.cap, udc->hw_bank.op); | |
318 | ||
f01ef574 PK |
319 | /* setup lock mode ? */ |
320 | ||
321 | /* ENDPTSETUPSTAT is '0' by default */ | |
322 | ||
323 | /* HCSPARAMS.bf.ppc SHOULD BE zero for device */ | |
324 | ||
325 | return 0; | |
326 | } | |
327 | /** | |
328 | * hw_device_reset: resets chip (execute without interruption) | |
329 | * @base: register base address | |
330 | * | |
331 | * This function returns an error code | |
332 | */ | |
333 | static int hw_device_reset(struct ci13xxx *udc) | |
334 | { | |
aa69a809 | 335 | /* should flush & stop before reset */ |
262c1632 AS |
336 | hw_write(udc, OP_ENDPTFLUSH, ~0, ~0); |
337 | hw_write(udc, OP_USBCMD, USBCMD_RS, 0); | |
aa69a809 | 338 | |
262c1632 AS |
339 | hw_write(udc, OP_USBCMD, USBCMD_RST, USBCMD_RST); |
340 | while (hw_read(udc, OP_USBCMD, USBCMD_RST)) | |
aa69a809 DL |
341 | udelay(10); /* not RTOS friendly */ |
342 | ||
f01ef574 PK |
343 | |
344 | if (udc->udc_driver->notify_event) | |
345 | udc->udc_driver->notify_event(udc, | |
346 | CI13XXX_CONTROLLER_RESET_EVENT); | |
347 | ||
8c2387a7 | 348 | if (udc->udc_driver->flags & CI13XXX_DISABLE_STREAMING) |
262c1632 | 349 | hw_write(udc, OP_USBMODE, USBMODE_SDIS, USBMODE_SDIS); |
f01ef574 | 350 | |
aa69a809 | 351 | /* USBMODE should be configured step by step */ |
262c1632 AS |
352 | hw_write(udc, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE); |
353 | hw_write(udc, OP_USBMODE, USBMODE_CM, USBMODE_CM_DEVICE); | |
f9df8395 | 354 | /* HW >= 2.3 */ |
262c1632 | 355 | hw_write(udc, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM); |
aa69a809 | 356 | |
262c1632 | 357 | if (hw_read(udc, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DEVICE) { |
aa69a809 | 358 | pr_err("cannot enter in device mode"); |
d3595d13 | 359 | pr_err("lpm = %i", udc->hw_bank.lpm); |
aa69a809 DL |
360 | return -ENODEV; |
361 | } | |
362 | ||
aa69a809 DL |
363 | return 0; |
364 | } | |
365 | ||
366 | /** | |
367 | * hw_device_state: enables/disables interrupts & starts/stops device (execute | |
368 | * without interruption) | |
369 | * @dma: 0 => disable, !0 => enable and set dma engine | |
370 | * | |
371 | * This function returns an error code | |
372 | */ | |
d3595d13 | 373 | static int hw_device_state(struct ci13xxx *udc, u32 dma) |
aa69a809 DL |
374 | { |
375 | if (dma) { | |
262c1632 | 376 | hw_write(udc, OP_ENDPTLISTADDR, ~0, dma); |
aa69a809 | 377 | /* interrupt, error, port change, reset, sleep/suspend */ |
262c1632 | 378 | hw_write(udc, OP_USBINTR, ~0, |
aa69a809 | 379 | USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI); |
262c1632 | 380 | hw_write(udc, OP_USBCMD, USBCMD_RS, USBCMD_RS); |
aa69a809 | 381 | } else { |
262c1632 AS |
382 | hw_write(udc, OP_USBCMD, USBCMD_RS, 0); |
383 | hw_write(udc, OP_USBINTR, ~0, 0); | |
aa69a809 DL |
384 | } |
385 | return 0; | |
386 | } | |
387 | ||
388 | /** | |
389 | * hw_ep_flush: flush endpoint fifo (execute without interruption) | |
390 | * @num: endpoint number | |
391 | * @dir: endpoint direction | |
392 | * | |
393 | * This function returns an error code | |
394 | */ | |
d3595d13 | 395 | static int hw_ep_flush(struct ci13xxx *udc, int num, int dir) |
aa69a809 DL |
396 | { |
397 | int n = hw_ep_bit(num, dir); | |
398 | ||
399 | do { | |
400 | /* flush any pending transfer */ | |
262c1632 AS |
401 | hw_write(udc, OP_ENDPTFLUSH, BIT(n), BIT(n)); |
402 | while (hw_read(udc, OP_ENDPTFLUSH, BIT(n))) | |
aa69a809 | 403 | cpu_relax(); |
262c1632 | 404 | } while (hw_read(udc, OP_ENDPTSTAT, BIT(n))); |
aa69a809 DL |
405 | |
406 | return 0; | |
407 | } | |
408 | ||
409 | /** | |
410 | * hw_ep_disable: disables endpoint (execute without interruption) | |
411 | * @num: endpoint number | |
412 | * @dir: endpoint direction | |
413 | * | |
414 | * This function returns an error code | |
415 | */ | |
d3595d13 | 416 | static int hw_ep_disable(struct ci13xxx *udc, int num, int dir) |
aa69a809 | 417 | { |
d3595d13 | 418 | hw_ep_flush(udc, num, dir); |
262c1632 | 419 | hw_write(udc, OP_ENDPTCTRL + num, |
d3595d13 | 420 | dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0); |
aa69a809 DL |
421 | return 0; |
422 | } | |
423 | ||
424 | /** | |
425 | * hw_ep_enable: enables endpoint (execute without interruption) | |
426 | * @num: endpoint number | |
427 | * @dir: endpoint direction | |
428 | * @type: endpoint type | |
429 | * | |
430 | * This function returns an error code | |
431 | */ | |
d3595d13 | 432 | static int hw_ep_enable(struct ci13xxx *udc, int num, int dir, int type) |
aa69a809 DL |
433 | { |
434 | u32 mask, data; | |
435 | ||
436 | if (dir) { | |
437 | mask = ENDPTCTRL_TXT; /* type */ | |
438 | data = type << ffs_nr(mask); | |
439 | ||
440 | mask |= ENDPTCTRL_TXS; /* unstall */ | |
441 | mask |= ENDPTCTRL_TXR; /* reset data toggle */ | |
442 | data |= ENDPTCTRL_TXR; | |
443 | mask |= ENDPTCTRL_TXE; /* enable */ | |
444 | data |= ENDPTCTRL_TXE; | |
445 | } else { | |
446 | mask = ENDPTCTRL_RXT; /* type */ | |
447 | data = type << ffs_nr(mask); | |
448 | ||
449 | mask |= ENDPTCTRL_RXS; /* unstall */ | |
450 | mask |= ENDPTCTRL_RXR; /* reset data toggle */ | |
451 | data |= ENDPTCTRL_RXR; | |
452 | mask |= ENDPTCTRL_RXE; /* enable */ | |
453 | data |= ENDPTCTRL_RXE; | |
454 | } | |
262c1632 | 455 | hw_write(udc, OP_ENDPTCTRL + num, mask, data); |
aa69a809 DL |
456 | return 0; |
457 | } | |
458 | ||
459 | /** | |
460 | * hw_ep_get_halt: return endpoint halt status | |
461 | * @num: endpoint number | |
462 | * @dir: endpoint direction | |
463 | * | |
464 | * This function returns 1 if endpoint halted | |
465 | */ | |
d3595d13 | 466 | static int hw_ep_get_halt(struct ci13xxx *udc, int num, int dir) |
aa69a809 DL |
467 | { |
468 | u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS; | |
469 | ||
262c1632 | 470 | return hw_read(udc, OP_ENDPTCTRL + num, mask) ? 1 : 0; |
aa69a809 DL |
471 | } |
472 | ||
aa69a809 DL |
473 | /** |
474 | * hw_test_and_clear_setup_status: test & clear setup status (execute without | |
475 | * interruption) | |
dd39c358 | 476 | * @n: endpoint number |
aa69a809 DL |
477 | * |
478 | * This function returns setup status | |
479 | */ | |
d3595d13 | 480 | static int hw_test_and_clear_setup_status(struct ci13xxx *udc, int n) |
aa69a809 | 481 | { |
d3595d13 | 482 | n = ep_to_bit(udc, n); |
262c1632 | 483 | return hw_test_and_clear(udc, OP_ENDPTSETUPSTAT, BIT(n)); |
aa69a809 DL |
484 | } |
485 | ||
486 | /** | |
487 | * hw_ep_prime: primes endpoint (execute without interruption) | |
488 | * @num: endpoint number | |
489 | * @dir: endpoint direction | |
490 | * @is_ctrl: true if control endpoint | |
491 | * | |
492 | * This function returns an error code | |
493 | */ | |
d3595d13 | 494 | static int hw_ep_prime(struct ci13xxx *udc, int num, int dir, int is_ctrl) |
aa69a809 DL |
495 | { |
496 | int n = hw_ep_bit(num, dir); | |
497 | ||
262c1632 | 498 | if (is_ctrl && dir == RX && hw_read(udc, OP_ENDPTSETUPSTAT, BIT(num))) |
aa69a809 DL |
499 | return -EAGAIN; |
500 | ||
262c1632 | 501 | hw_write(udc, OP_ENDPTPRIME, BIT(n), BIT(n)); |
aa69a809 | 502 | |
262c1632 | 503 | while (hw_read(udc, OP_ENDPTPRIME, BIT(n))) |
aa69a809 | 504 | cpu_relax(); |
262c1632 | 505 | if (is_ctrl && dir == RX && hw_read(udc, OP_ENDPTSETUPSTAT, BIT(num))) |
aa69a809 DL |
506 | return -EAGAIN; |
507 | ||
508 | /* status shoult be tested according with manual but it doesn't work */ | |
509 | return 0; | |
510 | } | |
511 | ||
512 | /** | |
513 | * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute | |
514 | * without interruption) | |
515 | * @num: endpoint number | |
516 | * @dir: endpoint direction | |
517 | * @value: true => stall, false => unstall | |
518 | * | |
519 | * This function returns an error code | |
520 | */ | |
d3595d13 | 521 | static int hw_ep_set_halt(struct ci13xxx *udc, int num, int dir, int value) |
aa69a809 DL |
522 | { |
523 | if (value != 0 && value != 1) | |
524 | return -EINVAL; | |
525 | ||
526 | do { | |
262c1632 | 527 | enum ci13xxx_regs reg = OP_ENDPTCTRL + num; |
aa69a809 DL |
528 | u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS; |
529 | u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR; | |
530 | ||
531 | /* data toggle - reserved for EP0 but it's in ESS */ | |
262c1632 AS |
532 | hw_write(udc, reg, mask_xs|mask_xr, |
533 | value ? mask_xs : mask_xr); | |
d3595d13 | 534 | } while (value != hw_ep_get_halt(udc, num, dir)); |
aa69a809 DL |
535 | |
536 | return 0; | |
537 | } | |
538 | ||
539 | /** | |
540 | * hw_intr_clear: disables interrupt & clears interrupt status (execute without | |
541 | * interruption) | |
542 | * @n: interrupt bit | |
543 | * | |
544 | * This function returns an error code | |
545 | */ | |
d3595d13 | 546 | static int hw_intr_clear(struct ci13xxx *udc, int n) |
aa69a809 DL |
547 | { |
548 | if (n >= REG_BITS) | |
549 | return -EINVAL; | |
550 | ||
262c1632 AS |
551 | hw_write(udc, OP_USBINTR, BIT(n), 0); |
552 | hw_write(udc, OP_USBSTS, BIT(n), BIT(n)); | |
aa69a809 DL |
553 | return 0; |
554 | } | |
555 | ||
556 | /** | |
557 | * hw_intr_force: enables interrupt & forces interrupt status (execute without | |
558 | * interruption) | |
559 | * @n: interrupt bit | |
560 | * | |
561 | * This function returns an error code | |
562 | */ | |
d3595d13 | 563 | static int hw_intr_force(struct ci13xxx *udc, int n) |
aa69a809 DL |
564 | { |
565 | if (n >= REG_BITS) | |
566 | return -EINVAL; | |
567 | ||
262c1632 AS |
568 | hw_write(udc, CAP_TESTMODE, TESTMODE_FORCE, TESTMODE_FORCE); |
569 | hw_write(udc, OP_USBINTR, BIT(n), BIT(n)); | |
570 | hw_write(udc, OP_USBSTS, BIT(n), BIT(n)); | |
571 | hw_write(udc, CAP_TESTMODE, TESTMODE_FORCE, 0); | |
aa69a809 DL |
572 | return 0; |
573 | } | |
574 | ||
575 | /** | |
576 | * hw_is_port_high_speed: test if port is high speed | |
577 | * | |
578 | * This function returns true if high speed port | |
579 | */ | |
d3595d13 | 580 | static int hw_port_is_high_speed(struct ci13xxx *udc) |
aa69a809 | 581 | { |
262c1632 AS |
582 | return udc->hw_bank.lpm ? hw_read(udc, OP_DEVLC, DEVLC_PSPD) : |
583 | hw_read(udc, OP_PORTSC, PORTSC_HSP); | |
aa69a809 DL |
584 | } |
585 | ||
586 | /** | |
587 | * hw_port_test_get: reads port test mode value | |
588 | * | |
589 | * This function returns port test mode value | |
590 | */ | |
d3595d13 | 591 | static u8 hw_port_test_get(struct ci13xxx *udc) |
aa69a809 | 592 | { |
262c1632 | 593 | return hw_read(udc, OP_PORTSC, PORTSC_PTC) >> ffs_nr(PORTSC_PTC); |
aa69a809 DL |
594 | } |
595 | ||
596 | /** | |
597 | * hw_port_test_set: writes port test mode (execute without interruption) | |
598 | * @mode: new value | |
599 | * | |
600 | * This function returns an error code | |
601 | */ | |
d3595d13 | 602 | static int hw_port_test_set(struct ci13xxx *udc, u8 mode) |
aa69a809 DL |
603 | { |
604 | const u8 TEST_MODE_MAX = 7; | |
605 | ||
606 | if (mode > TEST_MODE_MAX) | |
607 | return -EINVAL; | |
608 | ||
262c1632 | 609 | hw_write(udc, OP_PORTSC, PORTSC_PTC, mode << ffs_nr(PORTSC_PTC)); |
aa69a809 DL |
610 | return 0; |
611 | } | |
612 | ||
613 | /** | |
614 | * hw_read_intr_enable: returns interrupt enable register | |
615 | * | |
616 | * This function returns register data | |
617 | */ | |
d3595d13 | 618 | static u32 hw_read_intr_enable(struct ci13xxx *udc) |
aa69a809 | 619 | { |
262c1632 | 620 | return hw_read(udc, OP_USBINTR, ~0); |
aa69a809 DL |
621 | } |
622 | ||
623 | /** | |
624 | * hw_read_intr_status: returns interrupt status register | |
625 | * | |
626 | * This function returns register data | |
627 | */ | |
d3595d13 | 628 | static u32 hw_read_intr_status(struct ci13xxx *udc) |
aa69a809 | 629 | { |
262c1632 | 630 | return hw_read(udc, OP_USBSTS, ~0); |
aa69a809 DL |
631 | } |
632 | ||
633 | /** | |
634 | * hw_register_read: reads all device registers (execute without interruption) | |
635 | * @buf: destination buffer | |
636 | * @size: buffer size | |
637 | * | |
638 | * This function returns number of registers read | |
639 | */ | |
d3595d13 | 640 | static size_t hw_register_read(struct ci13xxx *udc, u32 *buf, size_t size) |
aa69a809 DL |
641 | { |
642 | unsigned i; | |
643 | ||
d3595d13 AS |
644 | if (size > udc->hw_bank.size) |
645 | size = udc->hw_bank.size; | |
aa69a809 DL |
646 | |
647 | for (i = 0; i < size; i++) | |
262c1632 | 648 | buf[i] = hw_read(udc, i * sizeof(u32), ~0); |
aa69a809 DL |
649 | |
650 | return size; | |
651 | } | |
652 | ||
653 | /** | |
654 | * hw_register_write: writes to register | |
655 | * @addr: register address | |
656 | * @data: register value | |
657 | * | |
658 | * This function returns an error code | |
659 | */ | |
d3595d13 | 660 | static int hw_register_write(struct ci13xxx *udc, u16 addr, u32 data) |
aa69a809 DL |
661 | { |
662 | /* align */ | |
663 | addr /= sizeof(u32); | |
664 | ||
d3595d13 | 665 | if (addr >= udc->hw_bank.size) |
aa69a809 DL |
666 | return -EINVAL; |
667 | ||
668 | /* align */ | |
669 | addr *= sizeof(u32); | |
670 | ||
262c1632 | 671 | hw_write(udc, addr, ~0, data); |
aa69a809 DL |
672 | return 0; |
673 | } | |
674 | ||
675 | /** | |
676 | * hw_test_and_clear_complete: test & clear complete status (execute without | |
677 | * interruption) | |
dd39c358 | 678 | * @n: endpoint number |
aa69a809 DL |
679 | * |
680 | * This function returns complete status | |
681 | */ | |
d3595d13 | 682 | static int hw_test_and_clear_complete(struct ci13xxx *udc, int n) |
aa69a809 | 683 | { |
d3595d13 | 684 | n = ep_to_bit(udc, n); |
262c1632 | 685 | return hw_test_and_clear(udc, OP_ENDPTCOMPLETE, BIT(n)); |
aa69a809 DL |
686 | } |
687 | ||
688 | /** | |
689 | * hw_test_and_clear_intr_active: test & clear active interrupts (execute | |
690 | * without interruption) | |
691 | * | |
692 | * This function returns active interrutps | |
693 | */ | |
d3595d13 | 694 | static u32 hw_test_and_clear_intr_active(struct ci13xxx *udc) |
aa69a809 | 695 | { |
d3595d13 | 696 | u32 reg = hw_read_intr_status(udc) & hw_read_intr_enable(udc); |
aa69a809 | 697 | |
262c1632 | 698 | hw_write(udc, OP_USBSTS, ~0, reg); |
aa69a809 DL |
699 | return reg; |
700 | } | |
701 | ||
702 | /** | |
703 | * hw_test_and_clear_setup_guard: test & clear setup guard (execute without | |
704 | * interruption) | |
705 | * | |
706 | * This function returns guard value | |
707 | */ | |
d3595d13 | 708 | static int hw_test_and_clear_setup_guard(struct ci13xxx *udc) |
aa69a809 | 709 | { |
262c1632 | 710 | return hw_test_and_write(udc, OP_USBCMD, USBCMD_SUTW, 0); |
aa69a809 DL |
711 | } |
712 | ||
713 | /** | |
714 | * hw_test_and_set_setup_guard: test & set setup guard (execute without | |
715 | * interruption) | |
716 | * | |
717 | * This function returns guard value | |
718 | */ | |
d3595d13 | 719 | static int hw_test_and_set_setup_guard(struct ci13xxx *udc) |
aa69a809 | 720 | { |
262c1632 | 721 | return hw_test_and_write(udc, OP_USBCMD, USBCMD_SUTW, USBCMD_SUTW); |
aa69a809 DL |
722 | } |
723 | ||
724 | /** | |
725 | * hw_usb_set_address: configures USB address (execute without interruption) | |
726 | * @value: new USB address | |
727 | * | |
ef15e549 AS |
728 | * This function explicitly sets the address, without the "USBADRA" (advance) |
729 | * feature, which is not supported by older versions of the controller. | |
aa69a809 | 730 | */ |
ef15e549 | 731 | static void hw_usb_set_address(struct ci13xxx *udc, u8 value) |
aa69a809 | 732 | { |
ef15e549 AS |
733 | hw_write(udc, OP_DEVICEADDR, DEVICEADDR_USBADR, |
734 | value << ffs_nr(DEVICEADDR_USBADR)); | |
aa69a809 DL |
735 | } |
736 | ||
737 | /** | |
738 | * hw_usb_reset: restart device after a bus reset (execute without | |
739 | * interruption) | |
740 | * | |
741 | * This function returns an error code | |
742 | */ | |
d3595d13 | 743 | static int hw_usb_reset(struct ci13xxx *udc) |
aa69a809 | 744 | { |
d3595d13 | 745 | hw_usb_set_address(udc, 0); |
aa69a809 DL |
746 | |
747 | /* ESS flushes only at end?!? */ | |
262c1632 | 748 | hw_write(udc, OP_ENDPTFLUSH, ~0, ~0); |
aa69a809 DL |
749 | |
750 | /* clear setup token semaphores */ | |
262c1632 | 751 | hw_write(udc, OP_ENDPTSETUPSTAT, 0, 0); |
aa69a809 DL |
752 | |
753 | /* clear complete status */ | |
262c1632 | 754 | hw_write(udc, OP_ENDPTCOMPLETE, 0, 0); |
aa69a809 DL |
755 | |
756 | /* wait until all bits cleared */ | |
262c1632 | 757 | while (hw_read(udc, OP_ENDPTPRIME, ~0)) |
aa69a809 DL |
758 | udelay(10); /* not RTOS friendly */ |
759 | ||
760 | /* reset all endpoints ? */ | |
761 | ||
762 | /* reset internal status and wait for further instructions | |
763 | no need to verify the port reset status (ESS does it) */ | |
764 | ||
765 | return 0; | |
766 | } | |
767 | ||
768 | /****************************************************************************** | |
769 | * DBG block | |
770 | *****************************************************************************/ | |
771 | /** | |
772 | * show_device: prints information about device capabilities and status | |
773 | * | |
774 | * Check "device.h" for details | |
775 | */ | |
776 | static ssize_t show_device(struct device *dev, struct device_attribute *attr, | |
777 | char *buf) | |
778 | { | |
779 | struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev); | |
780 | struct usb_gadget *gadget = &udc->gadget; | |
781 | int n = 0; | |
782 | ||
aa69a809 | 783 | if (attr == NULL || buf == NULL) { |
0f089094 | 784 | dev_err(udc->dev, "[%s] EINVAL\n", __func__); |
aa69a809 DL |
785 | return 0; |
786 | } | |
787 | ||
788 | n += scnprintf(buf + n, PAGE_SIZE - n, "speed = %d\n", | |
789 | gadget->speed); | |
d327ab5b MN |
790 | n += scnprintf(buf + n, PAGE_SIZE - n, "max_speed = %d\n", |
791 | gadget->max_speed); | |
792 | /* TODO: Scheduled for removal in 3.8. */ | |
aa69a809 | 793 | n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed = %d\n", |
d327ab5b | 794 | gadget_is_dualspeed(gadget)); |
aa69a809 DL |
795 | n += scnprintf(buf + n, PAGE_SIZE - n, "is_otg = %d\n", |
796 | gadget->is_otg); | |
797 | n += scnprintf(buf + n, PAGE_SIZE - n, "is_a_peripheral = %d\n", | |
798 | gadget->is_a_peripheral); | |
799 | n += scnprintf(buf + n, PAGE_SIZE - n, "b_hnp_enable = %d\n", | |
800 | gadget->b_hnp_enable); | |
801 | n += scnprintf(buf + n, PAGE_SIZE - n, "a_hnp_support = %d\n", | |
802 | gadget->a_hnp_support); | |
803 | n += scnprintf(buf + n, PAGE_SIZE - n, "a_alt_hnp_support = %d\n", | |
804 | gadget->a_alt_hnp_support); | |
805 | n += scnprintf(buf + n, PAGE_SIZE - n, "name = %s\n", | |
806 | (gadget->name ? gadget->name : "")); | |
807 | ||
808 | return n; | |
809 | } | |
810 | static DEVICE_ATTR(device, S_IRUSR, show_device, NULL); | |
811 | ||
812 | /** | |
813 | * show_driver: prints information about attached gadget (if any) | |
814 | * | |
815 | * Check "device.h" for details | |
816 | */ | |
817 | static ssize_t show_driver(struct device *dev, struct device_attribute *attr, | |
818 | char *buf) | |
819 | { | |
820 | struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev); | |
821 | struct usb_gadget_driver *driver = udc->driver; | |
822 | int n = 0; | |
823 | ||
aa69a809 DL |
824 | if (attr == NULL || buf == NULL) { |
825 | dev_err(dev, "[%s] EINVAL\n", __func__); | |
826 | return 0; | |
827 | } | |
828 | ||
829 | if (driver == NULL) | |
830 | return scnprintf(buf, PAGE_SIZE, | |
831 | "There is no gadget attached!\n"); | |
832 | ||
833 | n += scnprintf(buf + n, PAGE_SIZE - n, "function = %s\n", | |
834 | (driver->function ? driver->function : "")); | |
835 | n += scnprintf(buf + n, PAGE_SIZE - n, "max speed = %d\n", | |
7177aed4 | 836 | driver->max_speed); |
aa69a809 DL |
837 | |
838 | return n; | |
839 | } | |
840 | static DEVICE_ATTR(driver, S_IRUSR, show_driver, NULL); | |
841 | ||
842 | /* Maximum event message length */ | |
843 | #define DBG_DATA_MSG 64UL | |
844 | ||
845 | /* Maximum event messages */ | |
846 | #define DBG_DATA_MAX 128UL | |
847 | ||
848 | /* Event buffer descriptor */ | |
849 | static struct { | |
850 | char (buf[DBG_DATA_MAX])[DBG_DATA_MSG]; /* buffer */ | |
851 | unsigned idx; /* index */ | |
852 | unsigned tty; /* print to console? */ | |
853 | rwlock_t lck; /* lock */ | |
854 | } dbg_data = { | |
855 | .idx = 0, | |
856 | .tty = 0, | |
857 | .lck = __RW_LOCK_UNLOCKED(lck) | |
858 | }; | |
859 | ||
860 | /** | |
861 | * dbg_dec: decrements debug event index | |
862 | * @idx: buffer index | |
863 | */ | |
864 | static void dbg_dec(unsigned *idx) | |
865 | { | |
866 | *idx = (*idx - 1) & (DBG_DATA_MAX-1); | |
867 | } | |
868 | ||
869 | /** | |
870 | * dbg_inc: increments debug event index | |
871 | * @idx: buffer index | |
872 | */ | |
873 | static void dbg_inc(unsigned *idx) | |
874 | { | |
875 | *idx = (*idx + 1) & (DBG_DATA_MAX-1); | |
876 | } | |
877 | ||
878 | /** | |
879 | * dbg_print: prints the common part of the event | |
880 | * @addr: endpoint address | |
881 | * @name: event name | |
882 | * @status: status | |
883 | * @extra: extra information | |
884 | */ | |
885 | static void dbg_print(u8 addr, const char *name, int status, const char *extra) | |
886 | { | |
887 | struct timeval tval; | |
888 | unsigned int stamp; | |
889 | unsigned long flags; | |
890 | ||
891 | write_lock_irqsave(&dbg_data.lck, flags); | |
892 | ||
893 | do_gettimeofday(&tval); | |
894 | stamp = tval.tv_sec & 0xFFFF; /* 2^32 = 4294967296. Limit to 4096s */ | |
895 | stamp = stamp * 1000000 + tval.tv_usec; | |
896 | ||
897 | scnprintf(dbg_data.buf[dbg_data.idx], DBG_DATA_MSG, | |
0f91349b | 898 | "%04X\t? %02X %-7.7s %4i ?\t%s\n", |
aa69a809 DL |
899 | stamp, addr, name, status, extra); |
900 | ||
901 | dbg_inc(&dbg_data.idx); | |
902 | ||
903 | write_unlock_irqrestore(&dbg_data.lck, flags); | |
904 | ||
905 | if (dbg_data.tty != 0) | |
0f91349b | 906 | pr_notice("%04X\t? %02X %-7.7s %4i ?\t%s\n", |
aa69a809 DL |
907 | stamp, addr, name, status, extra); |
908 | } | |
909 | ||
910 | /** | |
911 | * dbg_done: prints a DONE event | |
912 | * @addr: endpoint address | |
913 | * @td: transfer descriptor | |
914 | * @status: status | |
915 | */ | |
916 | static void dbg_done(u8 addr, const u32 token, int status) | |
917 | { | |
918 | char msg[DBG_DATA_MSG]; | |
919 | ||
920 | scnprintf(msg, sizeof(msg), "%d %02X", | |
921 | (int)(token & TD_TOTAL_BYTES) >> ffs_nr(TD_TOTAL_BYTES), | |
922 | (int)(token & TD_STATUS) >> ffs_nr(TD_STATUS)); | |
923 | dbg_print(addr, "DONE", status, msg); | |
924 | } | |
925 | ||
926 | /** | |
927 | * dbg_event: prints a generic event | |
928 | * @addr: endpoint address | |
929 | * @name: event name | |
930 | * @status: status | |
931 | */ | |
932 | static void dbg_event(u8 addr, const char *name, int status) | |
933 | { | |
934 | if (name != NULL) | |
935 | dbg_print(addr, name, status, ""); | |
936 | } | |
937 | ||
938 | /* | |
939 | * dbg_queue: prints a QUEUE event | |
940 | * @addr: endpoint address | |
941 | * @req: USB request | |
942 | * @status: status | |
943 | */ | |
944 | static void dbg_queue(u8 addr, const struct usb_request *req, int status) | |
945 | { | |
946 | char msg[DBG_DATA_MSG]; | |
947 | ||
948 | if (req != NULL) { | |
949 | scnprintf(msg, sizeof(msg), | |
950 | "%d %d", !req->no_interrupt, req->length); | |
951 | dbg_print(addr, "QUEUE", status, msg); | |
952 | } | |
953 | } | |
954 | ||
955 | /** | |
956 | * dbg_setup: prints a SETUP event | |
957 | * @addr: endpoint address | |
958 | * @req: setup request | |
959 | */ | |
960 | static void dbg_setup(u8 addr, const struct usb_ctrlrequest *req) | |
961 | { | |
962 | char msg[DBG_DATA_MSG]; | |
963 | ||
964 | if (req != NULL) { | |
965 | scnprintf(msg, sizeof(msg), | |
966 | "%02X %02X %04X %04X %d", req->bRequestType, | |
967 | req->bRequest, le16_to_cpu(req->wValue), | |
968 | le16_to_cpu(req->wIndex), le16_to_cpu(req->wLength)); | |
969 | dbg_print(addr, "SETUP", 0, msg); | |
970 | } | |
971 | } | |
972 | ||
973 | /** | |
974 | * show_events: displays the event buffer | |
975 | * | |
976 | * Check "device.h" for details | |
977 | */ | |
978 | static ssize_t show_events(struct device *dev, struct device_attribute *attr, | |
979 | char *buf) | |
980 | { | |
981 | unsigned long flags; | |
982 | unsigned i, j, n = 0; | |
983 | ||
aa69a809 | 984 | if (attr == NULL || buf == NULL) { |
0f089094 | 985 | dev_err(dev->parent, "[%s] EINVAL\n", __func__); |
aa69a809 DL |
986 | return 0; |
987 | } | |
988 | ||
989 | read_lock_irqsave(&dbg_data.lck, flags); | |
990 | ||
991 | i = dbg_data.idx; | |
992 | for (dbg_dec(&i); i != dbg_data.idx; dbg_dec(&i)) { | |
993 | n += strlen(dbg_data.buf[i]); | |
994 | if (n >= PAGE_SIZE) { | |
995 | n -= strlen(dbg_data.buf[i]); | |
996 | break; | |
997 | } | |
998 | } | |
999 | for (j = 0, dbg_inc(&i); j < n; dbg_inc(&i)) | |
1000 | j += scnprintf(buf + j, PAGE_SIZE - j, | |
1001 | "%s", dbg_data.buf[i]); | |
1002 | ||
1003 | read_unlock_irqrestore(&dbg_data.lck, flags); | |
1004 | ||
1005 | return n; | |
1006 | } | |
1007 | ||
1008 | /** | |
1009 | * store_events: configure if events are going to be also printed to console | |
1010 | * | |
1011 | * Check "device.h" for details | |
1012 | */ | |
1013 | static ssize_t store_events(struct device *dev, struct device_attribute *attr, | |
1014 | const char *buf, size_t count) | |
1015 | { | |
1016 | unsigned tty; | |
1017 | ||
aa69a809 DL |
1018 | if (attr == NULL || buf == NULL) { |
1019 | dev_err(dev, "[%s] EINVAL\n", __func__); | |
1020 | goto done; | |
1021 | } | |
1022 | ||
1023 | if (sscanf(buf, "%u", &tty) != 1 || tty > 1) { | |
1024 | dev_err(dev, "<1|0>: enable|disable console log\n"); | |
1025 | goto done; | |
1026 | } | |
1027 | ||
1028 | dbg_data.tty = tty; | |
1029 | dev_info(dev, "tty = %u", dbg_data.tty); | |
1030 | ||
1031 | done: | |
1032 | return count; | |
1033 | } | |
1034 | static DEVICE_ATTR(events, S_IRUSR | S_IWUSR, show_events, store_events); | |
1035 | ||
1036 | /** | |
1037 | * show_inters: interrupt status, enable status and historic | |
1038 | * | |
1039 | * Check "device.h" for details | |
1040 | */ | |
1041 | static ssize_t show_inters(struct device *dev, struct device_attribute *attr, | |
1042 | char *buf) | |
1043 | { | |
1044 | struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev); | |
1045 | unsigned long flags; | |
1046 | u32 intr; | |
1047 | unsigned i, j, n = 0; | |
1048 | ||
aa69a809 | 1049 | if (attr == NULL || buf == NULL) { |
0f089094 | 1050 | dev_err(udc->dev, "[%s] EINVAL\n", __func__); |
aa69a809 DL |
1051 | return 0; |
1052 | } | |
1053 | ||
d3595d13 | 1054 | spin_lock_irqsave(&udc->lock, flags); |
aa69a809 DL |
1055 | |
1056 | n += scnprintf(buf + n, PAGE_SIZE - n, | |
d3595d13 | 1057 | "status = %08x\n", hw_read_intr_status(udc)); |
aa69a809 | 1058 | n += scnprintf(buf + n, PAGE_SIZE - n, |
d3595d13 | 1059 | "enable = %08x\n", hw_read_intr_enable(udc)); |
aa69a809 DL |
1060 | |
1061 | n += scnprintf(buf + n, PAGE_SIZE - n, "*test = %d\n", | |
1062 | isr_statistics.test); | |
0f91349b | 1063 | n += scnprintf(buf + n, PAGE_SIZE - n, "? ui = %d\n", |
aa69a809 | 1064 | isr_statistics.ui); |
0f91349b | 1065 | n += scnprintf(buf + n, PAGE_SIZE - n, "? uei = %d\n", |
aa69a809 | 1066 | isr_statistics.uei); |
0f91349b | 1067 | n += scnprintf(buf + n, PAGE_SIZE - n, "? pci = %d\n", |
aa69a809 | 1068 | isr_statistics.pci); |
0f91349b | 1069 | n += scnprintf(buf + n, PAGE_SIZE - n, "? uri = %d\n", |
aa69a809 | 1070 | isr_statistics.uri); |
0f91349b | 1071 | n += scnprintf(buf + n, PAGE_SIZE - n, "? sli = %d\n", |
aa69a809 DL |
1072 | isr_statistics.sli); |
1073 | n += scnprintf(buf + n, PAGE_SIZE - n, "*none = %d\n", | |
1074 | isr_statistics.none); | |
1075 | n += scnprintf(buf + n, PAGE_SIZE - n, "*hndl = %d\n", | |
1076 | isr_statistics.hndl.cnt); | |
1077 | ||
1078 | for (i = isr_statistics.hndl.idx, j = 0; j <= ISR_MASK; j++, i++) { | |
1079 | i &= ISR_MASK; | |
1080 | intr = isr_statistics.hndl.buf[i]; | |
1081 | ||
1082 | if (USBi_UI & intr) | |
1083 | n += scnprintf(buf + n, PAGE_SIZE - n, "ui "); | |
1084 | intr &= ~USBi_UI; | |
1085 | if (USBi_UEI & intr) | |
1086 | n += scnprintf(buf + n, PAGE_SIZE - n, "uei "); | |
1087 | intr &= ~USBi_UEI; | |
1088 | if (USBi_PCI & intr) | |
1089 | n += scnprintf(buf + n, PAGE_SIZE - n, "pci "); | |
1090 | intr &= ~USBi_PCI; | |
1091 | if (USBi_URI & intr) | |
1092 | n += scnprintf(buf + n, PAGE_SIZE - n, "uri "); | |
1093 | intr &= ~USBi_URI; | |
1094 | if (USBi_SLI & intr) | |
1095 | n += scnprintf(buf + n, PAGE_SIZE - n, "sli "); | |
1096 | intr &= ~USBi_SLI; | |
1097 | if (intr) | |
1098 | n += scnprintf(buf + n, PAGE_SIZE - n, "??? "); | |
1099 | if (isr_statistics.hndl.buf[i]) | |
1100 | n += scnprintf(buf + n, PAGE_SIZE - n, "\n"); | |
1101 | } | |
1102 | ||
d3595d13 | 1103 | spin_unlock_irqrestore(&udc->lock, flags); |
aa69a809 DL |
1104 | |
1105 | return n; | |
1106 | } | |
1107 | ||
1108 | /** | |
1109 | * store_inters: enable & force or disable an individual interrutps | |
1110 | * (to be used for test purposes only) | |
1111 | * | |
1112 | * Check "device.h" for details | |
1113 | */ | |
1114 | static ssize_t store_inters(struct device *dev, struct device_attribute *attr, | |
1115 | const char *buf, size_t count) | |
1116 | { | |
1117 | struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev); | |
1118 | unsigned long flags; | |
1119 | unsigned en, bit; | |
1120 | ||
aa69a809 | 1121 | if (attr == NULL || buf == NULL) { |
0f089094 | 1122 | dev_err(udc->dev, "EINVAL\n"); |
aa69a809 DL |
1123 | goto done; |
1124 | } | |
1125 | ||
1126 | if (sscanf(buf, "%u %u", &en, &bit) != 2 || en > 1) { | |
0f089094 | 1127 | dev_err(udc->dev, "<1|0> <bit>: enable|disable interrupt\n"); |
aa69a809 DL |
1128 | goto done; |
1129 | } | |
1130 | ||
d3595d13 | 1131 | spin_lock_irqsave(&udc->lock, flags); |
aa69a809 | 1132 | if (en) { |
d3595d13 | 1133 | if (hw_intr_force(udc, bit)) |
aa69a809 DL |
1134 | dev_err(dev, "invalid bit number\n"); |
1135 | else | |
1136 | isr_statistics.test++; | |
1137 | } else { | |
d3595d13 | 1138 | if (hw_intr_clear(udc, bit)) |
aa69a809 DL |
1139 | dev_err(dev, "invalid bit number\n"); |
1140 | } | |
d3595d13 | 1141 | spin_unlock_irqrestore(&udc->lock, flags); |
aa69a809 DL |
1142 | |
1143 | done: | |
1144 | return count; | |
1145 | } | |
1146 | static DEVICE_ATTR(inters, S_IRUSR | S_IWUSR, show_inters, store_inters); | |
1147 | ||
1148 | /** | |
1149 | * show_port_test: reads port test mode | |
1150 | * | |
1151 | * Check "device.h" for details | |
1152 | */ | |
1153 | static ssize_t show_port_test(struct device *dev, | |
1154 | struct device_attribute *attr, char *buf) | |
1155 | { | |
1156 | struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev); | |
1157 | unsigned long flags; | |
1158 | unsigned mode; | |
1159 | ||
aa69a809 | 1160 | if (attr == NULL || buf == NULL) { |
0f089094 | 1161 | dev_err(udc->dev, "EINVAL\n"); |
aa69a809 DL |
1162 | return 0; |
1163 | } | |
1164 | ||
d3595d13 AS |
1165 | spin_lock_irqsave(&udc->lock, flags); |
1166 | mode = hw_port_test_get(udc); | |
1167 | spin_unlock_irqrestore(&udc->lock, flags); | |
aa69a809 DL |
1168 | |
1169 | return scnprintf(buf, PAGE_SIZE, "mode = %u\n", mode); | |
1170 | } | |
1171 | ||
1172 | /** | |
1173 | * store_port_test: writes port test mode | |
1174 | * | |
1175 | * Check "device.h" for details | |
1176 | */ | |
1177 | static ssize_t store_port_test(struct device *dev, | |
1178 | struct device_attribute *attr, | |
1179 | const char *buf, size_t count) | |
1180 | { | |
1181 | struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev); | |
1182 | unsigned long flags; | |
1183 | unsigned mode; | |
1184 | ||
aa69a809 | 1185 | if (attr == NULL || buf == NULL) { |
0f089094 | 1186 | dev_err(udc->dev, "[%s] EINVAL\n", __func__); |
aa69a809 DL |
1187 | goto done; |
1188 | } | |
1189 | ||
1190 | if (sscanf(buf, "%u", &mode) != 1) { | |
0f089094 | 1191 | dev_err(udc->dev, "<mode>: set port test mode"); |
aa69a809 DL |
1192 | goto done; |
1193 | } | |
1194 | ||
d3595d13 AS |
1195 | spin_lock_irqsave(&udc->lock, flags); |
1196 | if (hw_port_test_set(udc, mode)) | |
0f089094 | 1197 | dev_err(udc->dev, "invalid mode\n"); |
d3595d13 | 1198 | spin_unlock_irqrestore(&udc->lock, flags); |
aa69a809 DL |
1199 | |
1200 | done: | |
1201 | return count; | |
1202 | } | |
1203 | static DEVICE_ATTR(port_test, S_IRUSR | S_IWUSR, | |
1204 | show_port_test, store_port_test); | |
1205 | ||
1206 | /** | |
1207 | * show_qheads: DMA contents of all queue heads | |
1208 | * | |
1209 | * Check "device.h" for details | |
1210 | */ | |
1211 | static ssize_t show_qheads(struct device *dev, struct device_attribute *attr, | |
1212 | char *buf) | |
1213 | { | |
1214 | struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev); | |
1215 | unsigned long flags; | |
1216 | unsigned i, j, n = 0; | |
1217 | ||
aa69a809 | 1218 | if (attr == NULL || buf == NULL) { |
0f089094 | 1219 | dev_err(udc->dev, "[%s] EINVAL\n", __func__); |
aa69a809 DL |
1220 | return 0; |
1221 | } | |
1222 | ||
d3595d13 AS |
1223 | spin_lock_irqsave(&udc->lock, flags); |
1224 | for (i = 0; i < udc->hw_ep_max/2; i++) { | |
ca9cfea0 | 1225 | struct ci13xxx_ep *mEpRx = &udc->ci13xxx_ep[i]; |
d3595d13 AS |
1226 | struct ci13xxx_ep *mEpTx = |
1227 | &udc->ci13xxx_ep[i + udc->hw_ep_max/2]; | |
aa69a809 DL |
1228 | n += scnprintf(buf + n, PAGE_SIZE - n, |
1229 | "EP=%02i: RX=%08X TX=%08X\n", | |
ca9cfea0 | 1230 | i, (u32)mEpRx->qh.dma, (u32)mEpTx->qh.dma); |
aa69a809 DL |
1231 | for (j = 0; j < (sizeof(struct ci13xxx_qh)/sizeof(u32)); j++) { |
1232 | n += scnprintf(buf + n, PAGE_SIZE - n, | |
1233 | " %04X: %08X %08X\n", j, | |
ca9cfea0 PK |
1234 | *((u32 *)mEpRx->qh.ptr + j), |
1235 | *((u32 *)mEpTx->qh.ptr + j)); | |
aa69a809 DL |
1236 | } |
1237 | } | |
d3595d13 | 1238 | spin_unlock_irqrestore(&udc->lock, flags); |
aa69a809 DL |
1239 | |
1240 | return n; | |
1241 | } | |
1242 | static DEVICE_ATTR(qheads, S_IRUSR, show_qheads, NULL); | |
1243 | ||
1244 | /** | |
1245 | * show_registers: dumps all registers | |
1246 | * | |
1247 | * Check "device.h" for details | |
1248 | */ | |
c2b65f84 | 1249 | #define DUMP_ENTRIES 512 |
aa69a809 DL |
1250 | static ssize_t show_registers(struct device *dev, |
1251 | struct device_attribute *attr, char *buf) | |
1252 | { | |
1253 | struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev); | |
1254 | unsigned long flags; | |
c2b65f84 | 1255 | u32 *dump; |
aa69a809 DL |
1256 | unsigned i, k, n = 0; |
1257 | ||
aa69a809 | 1258 | if (attr == NULL || buf == NULL) { |
0f089094 | 1259 | dev_err(udc->dev, "[%s] EINVAL\n", __func__); |
aa69a809 DL |
1260 | return 0; |
1261 | } | |
1262 | ||
c2b65f84 SAS |
1263 | dump = kmalloc(sizeof(u32) * DUMP_ENTRIES, GFP_KERNEL); |
1264 | if (!dump) { | |
0f089094 | 1265 | dev_err(udc->dev, "%s: out of memory\n", __func__); |
c2b65f84 SAS |
1266 | return 0; |
1267 | } | |
1268 | ||
d3595d13 AS |
1269 | spin_lock_irqsave(&udc->lock, flags); |
1270 | k = hw_register_read(udc, dump, DUMP_ENTRIES); | |
1271 | spin_unlock_irqrestore(&udc->lock, flags); | |
aa69a809 DL |
1272 | |
1273 | for (i = 0; i < k; i++) { | |
1274 | n += scnprintf(buf + n, PAGE_SIZE - n, | |
1275 | "reg[0x%04X] = 0x%08X\n", | |
1276 | i * (unsigned)sizeof(u32), dump[i]); | |
1277 | } | |
c2b65f84 | 1278 | kfree(dump); |
aa69a809 DL |
1279 | |
1280 | return n; | |
1281 | } | |
1282 | ||
1283 | /** | |
1284 | * store_registers: writes value to register address | |
1285 | * | |
1286 | * Check "device.h" for details | |
1287 | */ | |
1288 | static ssize_t store_registers(struct device *dev, | |
1289 | struct device_attribute *attr, | |
1290 | const char *buf, size_t count) | |
1291 | { | |
1292 | struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev); | |
1293 | unsigned long addr, data, flags; | |
1294 | ||
aa69a809 | 1295 | if (attr == NULL || buf == NULL) { |
0f089094 | 1296 | dev_err(udc->dev, "[%s] EINVAL\n", __func__); |
aa69a809 DL |
1297 | goto done; |
1298 | } | |
1299 | ||
1300 | if (sscanf(buf, "%li %li", &addr, &data) != 2) { | |
0f089094 AS |
1301 | dev_err(udc->dev, |
1302 | "<addr> <data>: write data to register address\n"); | |
aa69a809 DL |
1303 | goto done; |
1304 | } | |
1305 | ||
d3595d13 AS |
1306 | spin_lock_irqsave(&udc->lock, flags); |
1307 | if (hw_register_write(udc, addr, data)) | |
0f089094 | 1308 | dev_err(udc->dev, "invalid address range\n"); |
d3595d13 | 1309 | spin_unlock_irqrestore(&udc->lock, flags); |
aa69a809 DL |
1310 | |
1311 | done: | |
1312 | return count; | |
1313 | } | |
1314 | static DEVICE_ATTR(registers, S_IRUSR | S_IWUSR, | |
1315 | show_registers, store_registers); | |
1316 | ||
1317 | /** | |
1318 | * show_requests: DMA contents of all requests currently queued (all endpts) | |
1319 | * | |
1320 | * Check "device.h" for details | |
1321 | */ | |
1322 | static ssize_t show_requests(struct device *dev, struct device_attribute *attr, | |
1323 | char *buf) | |
1324 | { | |
1325 | struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev); | |
1326 | unsigned long flags; | |
1327 | struct list_head *ptr = NULL; | |
1328 | struct ci13xxx_req *req = NULL; | |
ca9cfea0 | 1329 | unsigned i, j, n = 0, qSize = sizeof(struct ci13xxx_td)/sizeof(u32); |
aa69a809 | 1330 | |
aa69a809 | 1331 | if (attr == NULL || buf == NULL) { |
0f089094 | 1332 | dev_err(udc->dev, "[%s] EINVAL\n", __func__); |
aa69a809 DL |
1333 | return 0; |
1334 | } | |
1335 | ||
d3595d13 AS |
1336 | spin_lock_irqsave(&udc->lock, flags); |
1337 | for (i = 0; i < udc->hw_ep_max; i++) | |
ca9cfea0 PK |
1338 | list_for_each(ptr, &udc->ci13xxx_ep[i].qh.queue) |
1339 | { | |
1340 | req = list_entry(ptr, struct ci13xxx_req, queue); | |
aa69a809 | 1341 | |
ca9cfea0 PK |
1342 | n += scnprintf(buf + n, PAGE_SIZE - n, |
1343 | "EP=%02i: TD=%08X %s\n", | |
d3595d13 AS |
1344 | i % udc->hw_ep_max/2, (u32)req->dma, |
1345 | ((i < udc->hw_ep_max/2) ? "RX" : "TX")); | |
ca9cfea0 PK |
1346 | |
1347 | for (j = 0; j < qSize; j++) | |
aa69a809 | 1348 | n += scnprintf(buf + n, PAGE_SIZE - n, |
ca9cfea0 PK |
1349 | " %04X: %08X\n", j, |
1350 | *((u32 *)req->ptr + j)); | |
1351 | } | |
d3595d13 | 1352 | spin_unlock_irqrestore(&udc->lock, flags); |
aa69a809 DL |
1353 | |
1354 | return n; | |
1355 | } | |
1356 | static DEVICE_ATTR(requests, S_IRUSR, show_requests, NULL); | |
1357 | ||
1358 | /** | |
1359 | * dbg_create_files: initializes the attribute interface | |
1360 | * @dev: device | |
1361 | * | |
1362 | * This function returns an error code | |
1363 | */ | |
1364 | __maybe_unused static int dbg_create_files(struct device *dev) | |
1365 | { | |
1366 | int retval = 0; | |
1367 | ||
1368 | if (dev == NULL) | |
1369 | return -EINVAL; | |
1370 | retval = device_create_file(dev, &dev_attr_device); | |
1371 | if (retval) | |
1372 | goto done; | |
1373 | retval = device_create_file(dev, &dev_attr_driver); | |
1374 | if (retval) | |
1375 | goto rm_device; | |
1376 | retval = device_create_file(dev, &dev_attr_events); | |
1377 | if (retval) | |
1378 | goto rm_driver; | |
1379 | retval = device_create_file(dev, &dev_attr_inters); | |
1380 | if (retval) | |
1381 | goto rm_events; | |
1382 | retval = device_create_file(dev, &dev_attr_port_test); | |
1383 | if (retval) | |
1384 | goto rm_inters; | |
1385 | retval = device_create_file(dev, &dev_attr_qheads); | |
1386 | if (retval) | |
1387 | goto rm_port_test; | |
1388 | retval = device_create_file(dev, &dev_attr_registers); | |
1389 | if (retval) | |
1390 | goto rm_qheads; | |
1391 | retval = device_create_file(dev, &dev_attr_requests); | |
1392 | if (retval) | |
1393 | goto rm_registers; | |
1394 | return 0; | |
1395 | ||
1396 | rm_registers: | |
1397 | device_remove_file(dev, &dev_attr_registers); | |
1398 | rm_qheads: | |
1399 | device_remove_file(dev, &dev_attr_qheads); | |
1400 | rm_port_test: | |
1401 | device_remove_file(dev, &dev_attr_port_test); | |
1402 | rm_inters: | |
1403 | device_remove_file(dev, &dev_attr_inters); | |
1404 | rm_events: | |
1405 | device_remove_file(dev, &dev_attr_events); | |
1406 | rm_driver: | |
1407 | device_remove_file(dev, &dev_attr_driver); | |
1408 | rm_device: | |
1409 | device_remove_file(dev, &dev_attr_device); | |
1410 | done: | |
1411 | return retval; | |
1412 | } | |
1413 | ||
1414 | /** | |
1415 | * dbg_remove_files: destroys the attribute interface | |
1416 | * @dev: device | |
1417 | * | |
1418 | * This function returns an error code | |
1419 | */ | |
1420 | __maybe_unused static int dbg_remove_files(struct device *dev) | |
1421 | { | |
1422 | if (dev == NULL) | |
1423 | return -EINVAL; | |
1424 | device_remove_file(dev, &dev_attr_requests); | |
1425 | device_remove_file(dev, &dev_attr_registers); | |
1426 | device_remove_file(dev, &dev_attr_qheads); | |
1427 | device_remove_file(dev, &dev_attr_port_test); | |
1428 | device_remove_file(dev, &dev_attr_inters); | |
1429 | device_remove_file(dev, &dev_attr_events); | |
1430 | device_remove_file(dev, &dev_attr_driver); | |
1431 | device_remove_file(dev, &dev_attr_device); | |
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | /****************************************************************************** | |
1436 | * UTIL block | |
1437 | *****************************************************************************/ | |
1438 | /** | |
1439 | * _usb_addr: calculates endpoint address from direction & number | |
1440 | * @ep: endpoint | |
1441 | */ | |
1442 | static inline u8 _usb_addr(struct ci13xxx_ep *ep) | |
1443 | { | |
1444 | return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num; | |
1445 | } | |
1446 | ||
1447 | /** | |
1448 | * _hardware_queue: configures a request at hardware level | |
1449 | * @gadget: gadget | |
1450 | * @mEp: endpoint | |
1451 | * | |
1452 | * This function returns an error code | |
1453 | */ | |
1454 | static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq) | |
1455 | { | |
d3595d13 | 1456 | struct ci13xxx *udc = mEp->udc; |
aa69a809 | 1457 | unsigned i; |
0e6ca199 PK |
1458 | int ret = 0; |
1459 | unsigned length = mReq->req.length; | |
aa69a809 | 1460 | |
aa69a809 DL |
1461 | /* don't queue twice */ |
1462 | if (mReq->req.status == -EALREADY) | |
1463 | return -EALREADY; | |
1464 | ||
aa69a809 | 1465 | mReq->req.status = -EALREADY; |
954aad8c | 1466 | if (length && mReq->req.dma == DMA_ADDR_INVALID) { |
aa69a809 DL |
1467 | mReq->req.dma = \ |
1468 | dma_map_single(mEp->device, mReq->req.buf, | |
0e6ca199 PK |
1469 | length, mEp->dir ? DMA_TO_DEVICE : |
1470 | DMA_FROM_DEVICE); | |
aa69a809 DL |
1471 | if (mReq->req.dma == 0) |
1472 | return -ENOMEM; | |
1473 | ||
1474 | mReq->map = 1; | |
1475 | } | |
1476 | ||
0e6ca199 PK |
1477 | if (mReq->req.zero && length && (length % mEp->ep.maxpacket == 0)) { |
1478 | mReq->zptr = dma_pool_alloc(mEp->td_pool, GFP_ATOMIC, | |
1479 | &mReq->zdma); | |
1480 | if (mReq->zptr == NULL) { | |
1481 | if (mReq->map) { | |
1482 | dma_unmap_single(mEp->device, mReq->req.dma, | |
1483 | length, mEp->dir ? DMA_TO_DEVICE : | |
1484 | DMA_FROM_DEVICE); | |
954aad8c | 1485 | mReq->req.dma = DMA_ADDR_INVALID; |
0e6ca199 PK |
1486 | mReq->map = 0; |
1487 | } | |
1488 | return -ENOMEM; | |
1489 | } | |
1490 | memset(mReq->zptr, 0, sizeof(*mReq->zptr)); | |
1491 | mReq->zptr->next = TD_TERMINATE; | |
1492 | mReq->zptr->token = TD_STATUS_ACTIVE; | |
1493 | if (!mReq->req.no_interrupt) | |
1494 | mReq->zptr->token |= TD_IOC; | |
1495 | } | |
aa69a809 DL |
1496 | /* |
1497 | * TD configuration | |
1498 | * TODO - handle requests which spawns into several TDs | |
1499 | */ | |
1500 | memset(mReq->ptr, 0, sizeof(*mReq->ptr)); | |
0e6ca199 | 1501 | mReq->ptr->token = length << ffs_nr(TD_TOTAL_BYTES); |
aa69a809 | 1502 | mReq->ptr->token &= TD_TOTAL_BYTES; |
aa69a809 | 1503 | mReq->ptr->token |= TD_STATUS_ACTIVE; |
0e6ca199 PK |
1504 | if (mReq->zptr) { |
1505 | mReq->ptr->next = mReq->zdma; | |
1506 | } else { | |
1507 | mReq->ptr->next = TD_TERMINATE; | |
1508 | if (!mReq->req.no_interrupt) | |
1509 | mReq->ptr->token |= TD_IOC; | |
1510 | } | |
aa69a809 DL |
1511 | mReq->ptr->page[0] = mReq->req.dma; |
1512 | for (i = 1; i < 5; i++) | |
1513 | mReq->ptr->page[i] = | |
0a313c4d | 1514 | (mReq->req.dma + i * CI13XXX_PAGE_SIZE) & ~TD_RESERVED_MASK; |
aa69a809 | 1515 | |
0e6ca199 PK |
1516 | if (!list_empty(&mEp->qh.queue)) { |
1517 | struct ci13xxx_req *mReqPrev; | |
1518 | int n = hw_ep_bit(mEp->num, mEp->dir); | |
1519 | int tmp_stat; | |
1520 | ||
1521 | mReqPrev = list_entry(mEp->qh.queue.prev, | |
1522 | struct ci13xxx_req, queue); | |
1523 | if (mReqPrev->zptr) | |
1524 | mReqPrev->zptr->next = mReq->dma & TD_ADDR_MASK; | |
1525 | else | |
1526 | mReqPrev->ptr->next = mReq->dma & TD_ADDR_MASK; | |
1527 | wmb(); | |
262c1632 | 1528 | if (hw_read(udc, OP_ENDPTPRIME, BIT(n))) |
0e6ca199 PK |
1529 | goto done; |
1530 | do { | |
262c1632 AS |
1531 | hw_write(udc, OP_USBCMD, USBCMD_ATDTW, USBCMD_ATDTW); |
1532 | tmp_stat = hw_read(udc, OP_ENDPTSTAT, BIT(n)); | |
1533 | } while (!hw_read(udc, OP_USBCMD, USBCMD_ATDTW)); | |
1534 | hw_write(udc, OP_USBCMD, USBCMD_ATDTW, 0); | |
0e6ca199 PK |
1535 | if (tmp_stat) |
1536 | goto done; | |
1537 | } | |
1538 | ||
1539 | /* QH configuration */ | |
ca9cfea0 PK |
1540 | mEp->qh.ptr->td.next = mReq->dma; /* TERMINATE = 0 */ |
1541 | mEp->qh.ptr->td.token &= ~TD_STATUS; /* clear status */ | |
0e6ca199 | 1542 | mEp->qh.ptr->cap |= QH_ZLT; |
aa69a809 DL |
1543 | |
1544 | wmb(); /* synchronize before ep prime */ | |
1545 | ||
d3595d13 | 1546 | ret = hw_ep_prime(udc, mEp->num, mEp->dir, |
aa69a809 | 1547 | mEp->type == USB_ENDPOINT_XFER_CONTROL); |
0e6ca199 PK |
1548 | done: |
1549 | return ret; | |
aa69a809 DL |
1550 | } |
1551 | ||
1552 | /** | |
1553 | * _hardware_dequeue: handles a request at hardware level | |
1554 | * @gadget: gadget | |
1555 | * @mEp: endpoint | |
1556 | * | |
1557 | * This function returns an error code | |
1558 | */ | |
1559 | static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq) | |
1560 | { | |
aa69a809 DL |
1561 | if (mReq->req.status != -EALREADY) |
1562 | return -EINVAL; | |
1563 | ||
0e6ca199 PK |
1564 | if ((TD_STATUS_ACTIVE & mReq->ptr->token) != 0) |
1565 | return -EBUSY; | |
1566 | ||
1567 | if (mReq->zptr) { | |
1568 | if ((TD_STATUS_ACTIVE & mReq->zptr->token) != 0) | |
1569 | return -EBUSY; | |
1570 | dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma); | |
1571 | mReq->zptr = NULL; | |
1572 | } | |
aa69a809 DL |
1573 | |
1574 | mReq->req.status = 0; | |
1575 | ||
1576 | if (mReq->map) { | |
1577 | dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length, | |
1578 | mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
954aad8c | 1579 | mReq->req.dma = DMA_ADDR_INVALID; |
aa69a809 DL |
1580 | mReq->map = 0; |
1581 | } | |
1582 | ||
1583 | mReq->req.status = mReq->ptr->token & TD_STATUS; | |
0e6ca199 | 1584 | if ((TD_STATUS_HALTED & mReq->req.status) != 0) |
aa69a809 DL |
1585 | mReq->req.status = -1; |
1586 | else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0) | |
1587 | mReq->req.status = -1; | |
1588 | else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0) | |
1589 | mReq->req.status = -1; | |
1590 | ||
1591 | mReq->req.actual = mReq->ptr->token & TD_TOTAL_BYTES; | |
1592 | mReq->req.actual >>= ffs_nr(TD_TOTAL_BYTES); | |
1593 | mReq->req.actual = mReq->req.length - mReq->req.actual; | |
1594 | mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual; | |
1595 | ||
1596 | return mReq->req.actual; | |
1597 | } | |
1598 | ||
1599 | /** | |
1600 | * _ep_nuke: dequeues all endpoint requests | |
1601 | * @mEp: endpoint | |
1602 | * | |
1603 | * This function returns an error code | |
1604 | * Caller must hold lock | |
1605 | */ | |
1606 | static int _ep_nuke(struct ci13xxx_ep *mEp) | |
1607 | __releases(mEp->lock) | |
1608 | __acquires(mEp->lock) | |
1609 | { | |
aa69a809 DL |
1610 | if (mEp == NULL) |
1611 | return -EINVAL; | |
1612 | ||
d3595d13 | 1613 | hw_ep_flush(mEp->udc, mEp->num, mEp->dir); |
aa69a809 | 1614 | |
ca9cfea0 | 1615 | while (!list_empty(&mEp->qh.queue)) { |
aa69a809 DL |
1616 | |
1617 | /* pop oldest request */ | |
1618 | struct ci13xxx_req *mReq = \ | |
ca9cfea0 | 1619 | list_entry(mEp->qh.queue.next, |
aa69a809 DL |
1620 | struct ci13xxx_req, queue); |
1621 | list_del_init(&mReq->queue); | |
1622 | mReq->req.status = -ESHUTDOWN; | |
1623 | ||
7c25a826 | 1624 | if (mReq->req.complete != NULL) { |
aa69a809 DL |
1625 | spin_unlock(mEp->lock); |
1626 | mReq->req.complete(&mEp->ep, &mReq->req); | |
1627 | spin_lock(mEp->lock); | |
1628 | } | |
1629 | } | |
1630 | return 0; | |
1631 | } | |
1632 | ||
1633 | /** | |
1634 | * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts | |
1635 | * @gadget: gadget | |
1636 | * | |
1637 | * This function returns an error code | |
aa69a809 DL |
1638 | */ |
1639 | static int _gadget_stop_activity(struct usb_gadget *gadget) | |
aa69a809 DL |
1640 | { |
1641 | struct usb_ep *ep; | |
1642 | struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget); | |
e2b61c1d | 1643 | unsigned long flags; |
aa69a809 | 1644 | |
aa69a809 DL |
1645 | if (gadget == NULL) |
1646 | return -EINVAL; | |
1647 | ||
d3595d13 | 1648 | spin_lock_irqsave(&udc->lock, flags); |
e2b61c1d PK |
1649 | udc->gadget.speed = USB_SPEED_UNKNOWN; |
1650 | udc->remote_wakeup = 0; | |
1651 | udc->suspended = 0; | |
d3595d13 | 1652 | spin_unlock_irqrestore(&udc->lock, flags); |
e2b61c1d | 1653 | |
aa69a809 DL |
1654 | /* flush all endpoints */ |
1655 | gadget_for_each_ep(ep, gadget) { | |
1656 | usb_ep_fifo_flush(ep); | |
1657 | } | |
d36ade60 AS |
1658 | usb_ep_fifo_flush(&udc->ep0out->ep); |
1659 | usb_ep_fifo_flush(&udc->ep0in->ep); | |
aa69a809 | 1660 | |
1f339d84 AS |
1661 | if (udc->driver) |
1662 | udc->driver->disconnect(gadget); | |
aa69a809 DL |
1663 | |
1664 | /* make sure to disable all endpoints */ | |
1665 | gadget_for_each_ep(ep, gadget) { | |
1666 | usb_ep_disable(ep); | |
1667 | } | |
aa69a809 | 1668 | |
ca9cfea0 | 1669 | if (udc->status != NULL) { |
d36ade60 | 1670 | usb_ep_free_request(&udc->ep0in->ep, udc->status); |
ca9cfea0 | 1671 | udc->status = NULL; |
aa69a809 DL |
1672 | } |
1673 | ||
aa69a809 DL |
1674 | return 0; |
1675 | } | |
1676 | ||
1677 | /****************************************************************************** | |
1678 | * ISR block | |
1679 | *****************************************************************************/ | |
1680 | /** | |
1681 | * isr_reset_handler: USB reset interrupt handler | |
1682 | * @udc: UDC device | |
1683 | * | |
1684 | * This function resets USB engine after a bus reset occurred | |
1685 | */ | |
1686 | static void isr_reset_handler(struct ci13xxx *udc) | |
1687 | __releases(udc->lock) | |
1688 | __acquires(udc->lock) | |
1689 | { | |
aa69a809 DL |
1690 | int retval; |
1691 | ||
aa69a809 DL |
1692 | dbg_event(0xFF, "BUS RST", 0); |
1693 | ||
d3595d13 | 1694 | spin_unlock(&udc->lock); |
aa69a809 DL |
1695 | retval = _gadget_stop_activity(&udc->gadget); |
1696 | if (retval) | |
1697 | goto done; | |
1698 | ||
d3595d13 | 1699 | retval = hw_usb_reset(udc); |
aa69a809 DL |
1700 | if (retval) |
1701 | goto done; | |
1702 | ||
d36ade60 | 1703 | udc->status = usb_ep_alloc_request(&udc->ep0in->ep, GFP_ATOMIC); |
ac1aa6a2 A |
1704 | if (udc->status == NULL) |
1705 | retval = -ENOMEM; | |
ca9cfea0 | 1706 | |
d3595d13 | 1707 | spin_lock(&udc->lock); |
aa69a809 DL |
1708 | |
1709 | done: | |
1710 | if (retval) | |
0f089094 | 1711 | dev_err(udc->dev, "error: %i\n", retval); |
aa69a809 DL |
1712 | } |
1713 | ||
1714 | /** | |
1715 | * isr_get_status_complete: get_status request complete function | |
1716 | * @ep: endpoint | |
1717 | * @req: request handled | |
1718 | * | |
1719 | * Caller must release lock | |
1720 | */ | |
1721 | static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req) | |
1722 | { | |
0f089094 | 1723 | if (ep == NULL || req == NULL) |
aa69a809 | 1724 | return; |
aa69a809 DL |
1725 | |
1726 | kfree(req->buf); | |
1727 | usb_ep_free_request(ep, req); | |
1728 | } | |
1729 | ||
1730 | /** | |
1731 | * isr_get_status_response: get_status request response | |
ca9cfea0 | 1732 | * @udc: udc struct |
aa69a809 DL |
1733 | * @setup: setup request packet |
1734 | * | |
1735 | * This function returns an error code | |
1736 | */ | |
ca9cfea0 | 1737 | static int isr_get_status_response(struct ci13xxx *udc, |
aa69a809 DL |
1738 | struct usb_ctrlrequest *setup) |
1739 | __releases(mEp->lock) | |
1740 | __acquires(mEp->lock) | |
1741 | { | |
d36ade60 | 1742 | struct ci13xxx_ep *mEp = udc->ep0in; |
aa69a809 DL |
1743 | struct usb_request *req = NULL; |
1744 | gfp_t gfp_flags = GFP_ATOMIC; | |
1745 | int dir, num, retval; | |
1746 | ||
aa69a809 DL |
1747 | if (mEp == NULL || setup == NULL) |
1748 | return -EINVAL; | |
1749 | ||
1750 | spin_unlock(mEp->lock); | |
1751 | req = usb_ep_alloc_request(&mEp->ep, gfp_flags); | |
1752 | spin_lock(mEp->lock); | |
1753 | if (req == NULL) | |
1754 | return -ENOMEM; | |
1755 | ||
1756 | req->complete = isr_get_status_complete; | |
1757 | req->length = 2; | |
1758 | req->buf = kzalloc(req->length, gfp_flags); | |
1759 | if (req->buf == NULL) { | |
1760 | retval = -ENOMEM; | |
1761 | goto err_free_req; | |
1762 | } | |
1763 | ||
1764 | if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) { | |
e2b61c1d | 1765 | /* Assume that device is bus powered for now. */ |
1f339d84 | 1766 | *(u16 *)req->buf = udc->remote_wakeup << 1; |
aa69a809 DL |
1767 | retval = 0; |
1768 | } else if ((setup->bRequestType & USB_RECIP_MASK) \ | |
1769 | == USB_RECIP_ENDPOINT) { | |
1770 | dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ? | |
1771 | TX : RX; | |
1772 | num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK; | |
d3595d13 | 1773 | *(u16 *)req->buf = hw_ep_get_halt(udc, num, dir); |
aa69a809 DL |
1774 | } |
1775 | /* else do nothing; reserved for future use */ | |
1776 | ||
1777 | spin_unlock(mEp->lock); | |
1778 | retval = usb_ep_queue(&mEp->ep, req, gfp_flags); | |
1779 | spin_lock(mEp->lock); | |
1780 | if (retval) | |
1781 | goto err_free_buf; | |
1782 | ||
1783 | return 0; | |
1784 | ||
1785 | err_free_buf: | |
1786 | kfree(req->buf); | |
1787 | err_free_req: | |
1788 | spin_unlock(mEp->lock); | |
1789 | usb_ep_free_request(&mEp->ep, req); | |
1790 | spin_lock(mEp->lock); | |
1791 | return retval; | |
1792 | } | |
1793 | ||
541cace8 PK |
1794 | /** |
1795 | * isr_setup_status_complete: setup_status request complete function | |
1796 | * @ep: endpoint | |
1797 | * @req: request handled | |
1798 | * | |
1799 | * Caller must release lock. Put the port in test mode if test mode | |
1800 | * feature is selected. | |
1801 | */ | |
1802 | static void | |
1803 | isr_setup_status_complete(struct usb_ep *ep, struct usb_request *req) | |
1804 | { | |
1805 | struct ci13xxx *udc = req->context; | |
1806 | unsigned long flags; | |
1807 | ||
ef15e549 AS |
1808 | if (udc->setaddr) { |
1809 | hw_usb_set_address(udc, udc->address); | |
1810 | udc->setaddr = false; | |
1811 | } | |
1812 | ||
d3595d13 | 1813 | spin_lock_irqsave(&udc->lock, flags); |
541cace8 | 1814 | if (udc->test_mode) |
d3595d13 AS |
1815 | hw_port_test_set(udc, udc->test_mode); |
1816 | spin_unlock_irqrestore(&udc->lock, flags); | |
541cace8 PK |
1817 | } |
1818 | ||
aa69a809 DL |
1819 | /** |
1820 | * isr_setup_status_phase: queues the status phase of a setup transation | |
ca9cfea0 | 1821 | * @udc: udc struct |
aa69a809 DL |
1822 | * |
1823 | * This function returns an error code | |
1824 | */ | |
ca9cfea0 | 1825 | static int isr_setup_status_phase(struct ci13xxx *udc) |
aa69a809 DL |
1826 | __releases(mEp->lock) |
1827 | __acquires(mEp->lock) | |
1828 | { | |
1829 | int retval; | |
ca9cfea0 | 1830 | struct ci13xxx_ep *mEp; |
aa69a809 | 1831 | |
d36ade60 | 1832 | mEp = (udc->ep0_dir == TX) ? udc->ep0out : udc->ep0in; |
541cace8 PK |
1833 | udc->status->context = udc; |
1834 | udc->status->complete = isr_setup_status_complete; | |
aa69a809 DL |
1835 | |
1836 | spin_unlock(mEp->lock); | |
ca9cfea0 | 1837 | retval = usb_ep_queue(&mEp->ep, udc->status, GFP_ATOMIC); |
aa69a809 DL |
1838 | spin_lock(mEp->lock); |
1839 | ||
1840 | return retval; | |
1841 | } | |
1842 | ||
1843 | /** | |
1844 | * isr_tr_complete_low: transaction complete low level handler | |
1845 | * @mEp: endpoint | |
1846 | * | |
1847 | * This function returns an error code | |
1848 | * Caller must hold lock | |
1849 | */ | |
1850 | static int isr_tr_complete_low(struct ci13xxx_ep *mEp) | |
1851 | __releases(mEp->lock) | |
1852 | __acquires(mEp->lock) | |
1853 | { | |
0e6ca199 | 1854 | struct ci13xxx_req *mReq, *mReqTemp; |
76cd9cfb | 1855 | struct ci13xxx_ep *mEpTemp = mEp; |
986b11b8 | 1856 | int uninitialized_var(retval); |
aa69a809 | 1857 | |
ca9cfea0 | 1858 | if (list_empty(&mEp->qh.queue)) |
aa69a809 DL |
1859 | return -EINVAL; |
1860 | ||
0e6ca199 PK |
1861 | list_for_each_entry_safe(mReq, mReqTemp, &mEp->qh.queue, |
1862 | queue) { | |
1863 | retval = _hardware_dequeue(mEp, mReq); | |
1864 | if (retval < 0) | |
1865 | break; | |
1866 | list_del_init(&mReq->queue); | |
1867 | dbg_done(_usb_addr(mEp), mReq->ptr->token, retval); | |
1868 | if (mReq->req.complete != NULL) { | |
1869 | spin_unlock(mEp->lock); | |
76cd9cfb PK |
1870 | if ((mEp->type == USB_ENDPOINT_XFER_CONTROL) && |
1871 | mReq->req.length) | |
1f339d84 | 1872 | mEpTemp = mEp->udc->ep0in; |
76cd9cfb | 1873 | mReq->req.complete(&mEpTemp->ep, &mReq->req); |
0e6ca199 PK |
1874 | spin_lock(mEp->lock); |
1875 | } | |
d9bb9c18 AL |
1876 | } |
1877 | ||
ef907482 | 1878 | if (retval == -EBUSY) |
0e6ca199 PK |
1879 | retval = 0; |
1880 | if (retval < 0) | |
1881 | dbg_event(_usb_addr(mEp), "DONE", retval); | |
aa69a809 | 1882 | |
aa69a809 DL |
1883 | return retval; |
1884 | } | |
1885 | ||
1886 | /** | |
1887 | * isr_tr_complete_handler: transaction complete interrupt handler | |
1888 | * @udc: UDC descriptor | |
1889 | * | |
1890 | * This function handles traffic events | |
1891 | */ | |
1892 | static void isr_tr_complete_handler(struct ci13xxx *udc) | |
1893 | __releases(udc->lock) | |
1894 | __acquires(udc->lock) | |
1895 | { | |
1896 | unsigned i; | |
541cace8 | 1897 | u8 tmode = 0; |
aa69a809 | 1898 | |
d3595d13 | 1899 | for (i = 0; i < udc->hw_ep_max; i++) { |
aa69a809 | 1900 | struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i]; |
4c5212b7 | 1901 | int type, num, dir, err = -EINVAL; |
aa69a809 DL |
1902 | struct usb_ctrlrequest req; |
1903 | ||
31fb6014 | 1904 | if (mEp->ep.desc == NULL) |
aa69a809 DL |
1905 | continue; /* not configured */ |
1906 | ||
d3595d13 | 1907 | if (hw_test_and_clear_complete(udc, i)) { |
aa69a809 DL |
1908 | err = isr_tr_complete_low(mEp); |
1909 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) { | |
1910 | if (err > 0) /* needs status phase */ | |
ca9cfea0 | 1911 | err = isr_setup_status_phase(udc); |
aa69a809 DL |
1912 | if (err < 0) { |
1913 | dbg_event(_usb_addr(mEp), | |
1914 | "ERROR", err); | |
d3595d13 | 1915 | spin_unlock(&udc->lock); |
aa69a809 | 1916 | if (usb_ep_set_halt(&mEp->ep)) |
0f089094 | 1917 | dev_err(udc->dev, |
0917ba84 | 1918 | "error: ep_set_halt\n"); |
d3595d13 | 1919 | spin_lock(&udc->lock); |
aa69a809 DL |
1920 | } |
1921 | } | |
1922 | } | |
1923 | ||
1924 | if (mEp->type != USB_ENDPOINT_XFER_CONTROL || | |
d3595d13 | 1925 | !hw_test_and_clear_setup_status(udc, i)) |
aa69a809 DL |
1926 | continue; |
1927 | ||
1928 | if (i != 0) { | |
0f089094 | 1929 | dev_warn(udc->dev, "ctrl traffic at endpoint %d\n", i); |
aa69a809 DL |
1930 | continue; |
1931 | } | |
1932 | ||
ca9cfea0 PK |
1933 | /* |
1934 | * Flush data and handshake transactions of previous | |
1935 | * setup packet. | |
1936 | */ | |
d36ade60 AS |
1937 | _ep_nuke(udc->ep0out); |
1938 | _ep_nuke(udc->ep0in); | |
ca9cfea0 | 1939 | |
aa69a809 DL |
1940 | /* read_setup_packet */ |
1941 | do { | |
d3595d13 | 1942 | hw_test_and_set_setup_guard(udc); |
ca9cfea0 | 1943 | memcpy(&req, &mEp->qh.ptr->setup, sizeof(req)); |
d3595d13 | 1944 | } while (!hw_test_and_clear_setup_guard(udc)); |
aa69a809 DL |
1945 | |
1946 | type = req.bRequestType; | |
1947 | ||
ca9cfea0 | 1948 | udc->ep0_dir = (type & USB_DIR_IN) ? TX : RX; |
aa69a809 DL |
1949 | |
1950 | dbg_setup(_usb_addr(mEp), &req); | |
1951 | ||
1952 | switch (req.bRequest) { | |
1953 | case USB_REQ_CLEAR_FEATURE: | |
e2b61c1d PK |
1954 | if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) && |
1955 | le16_to_cpu(req.wValue) == | |
1956 | USB_ENDPOINT_HALT) { | |
1957 | if (req.wLength != 0) | |
1958 | break; | |
1959 | num = le16_to_cpu(req.wIndex); | |
4c5212b7 | 1960 | dir = num & USB_ENDPOINT_DIR_MASK; |
e2b61c1d | 1961 | num &= USB_ENDPOINT_NUMBER_MASK; |
4c5212b7 | 1962 | if (dir) /* TX */ |
d3595d13 | 1963 | num += udc->hw_ep_max/2; |
e2b61c1d | 1964 | if (!udc->ci13xxx_ep[num].wedge) { |
d3595d13 | 1965 | spin_unlock(&udc->lock); |
e2b61c1d PK |
1966 | err = usb_ep_clear_halt( |
1967 | &udc->ci13xxx_ep[num].ep); | |
d3595d13 | 1968 | spin_lock(&udc->lock); |
e2b61c1d PK |
1969 | if (err) |
1970 | break; | |
1971 | } | |
1972 | err = isr_setup_status_phase(udc); | |
1973 | } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE) && | |
1974 | le16_to_cpu(req.wValue) == | |
1975 | USB_DEVICE_REMOTE_WAKEUP) { | |
1976 | if (req.wLength != 0) | |
aa69a809 | 1977 | break; |
e2b61c1d PK |
1978 | udc->remote_wakeup = 0; |
1979 | err = isr_setup_status_phase(udc); | |
1980 | } else { | |
1981 | goto delegate; | |
aa69a809 | 1982 | } |
aa69a809 DL |
1983 | break; |
1984 | case USB_REQ_GET_STATUS: | |
1985 | if (type != (USB_DIR_IN|USB_RECIP_DEVICE) && | |
1986 | type != (USB_DIR_IN|USB_RECIP_ENDPOINT) && | |
1987 | type != (USB_DIR_IN|USB_RECIP_INTERFACE)) | |
1988 | goto delegate; | |
1989 | if (le16_to_cpu(req.wLength) != 2 || | |
1990 | le16_to_cpu(req.wValue) != 0) | |
1991 | break; | |
ca9cfea0 | 1992 | err = isr_get_status_response(udc, &req); |
aa69a809 DL |
1993 | break; |
1994 | case USB_REQ_SET_ADDRESS: | |
1995 | if (type != (USB_DIR_OUT|USB_RECIP_DEVICE)) | |
1996 | goto delegate; | |
1997 | if (le16_to_cpu(req.wLength) != 0 || | |
1998 | le16_to_cpu(req.wIndex) != 0) | |
1999 | break; | |
ef15e549 AS |
2000 | udc->address = (u8)le16_to_cpu(req.wValue); |
2001 | udc->setaddr = true; | |
ca9cfea0 | 2002 | err = isr_setup_status_phase(udc); |
aa69a809 DL |
2003 | break; |
2004 | case USB_REQ_SET_FEATURE: | |
e2b61c1d PK |
2005 | if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) && |
2006 | le16_to_cpu(req.wValue) == | |
2007 | USB_ENDPOINT_HALT) { | |
2008 | if (req.wLength != 0) | |
2009 | break; | |
2010 | num = le16_to_cpu(req.wIndex); | |
4c5212b7 | 2011 | dir = num & USB_ENDPOINT_DIR_MASK; |
e2b61c1d | 2012 | num &= USB_ENDPOINT_NUMBER_MASK; |
4c5212b7 | 2013 | if (dir) /* TX */ |
d3595d13 | 2014 | num += udc->hw_ep_max/2; |
aa69a809 | 2015 | |
d3595d13 | 2016 | spin_unlock(&udc->lock); |
e2b61c1d | 2017 | err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep); |
d3595d13 | 2018 | spin_lock(&udc->lock); |
e2b61c1d | 2019 | if (!err) |
541cace8 PK |
2020 | isr_setup_status_phase(udc); |
2021 | } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE)) { | |
e2b61c1d PK |
2022 | if (req.wLength != 0) |
2023 | break; | |
541cace8 PK |
2024 | switch (le16_to_cpu(req.wValue)) { |
2025 | case USB_DEVICE_REMOTE_WAKEUP: | |
2026 | udc->remote_wakeup = 1; | |
2027 | err = isr_setup_status_phase(udc); | |
2028 | break; | |
2029 | case USB_DEVICE_TEST_MODE: | |
2030 | tmode = le16_to_cpu(req.wIndex) >> 8; | |
2031 | switch (tmode) { | |
2032 | case TEST_J: | |
2033 | case TEST_K: | |
2034 | case TEST_SE0_NAK: | |
2035 | case TEST_PACKET: | |
2036 | case TEST_FORCE_EN: | |
2037 | udc->test_mode = tmode; | |
2038 | err = isr_setup_status_phase( | |
2039 | udc); | |
2040 | break; | |
2041 | default: | |
2042 | break; | |
2043 | } | |
2044 | default: | |
2045 | goto delegate; | |
2046 | } | |
e2b61c1d PK |
2047 | } else { |
2048 | goto delegate; | |
2049 | } | |
aa69a809 DL |
2050 | break; |
2051 | default: | |
2052 | delegate: | |
2053 | if (req.wLength == 0) /* no data phase */ | |
ca9cfea0 | 2054 | udc->ep0_dir = TX; |
aa69a809 | 2055 | |
d3595d13 | 2056 | spin_unlock(&udc->lock); |
aa69a809 | 2057 | err = udc->driver->setup(&udc->gadget, &req); |
d3595d13 | 2058 | spin_lock(&udc->lock); |
aa69a809 DL |
2059 | break; |
2060 | } | |
2061 | ||
2062 | if (err < 0) { | |
2063 | dbg_event(_usb_addr(mEp), "ERROR", err); | |
2064 | ||
d3595d13 | 2065 | spin_unlock(&udc->lock); |
aa69a809 | 2066 | if (usb_ep_set_halt(&mEp->ep)) |
0f089094 | 2067 | dev_err(udc->dev, "error: ep_set_halt\n"); |
d3595d13 | 2068 | spin_lock(&udc->lock); |
aa69a809 DL |
2069 | } |
2070 | } | |
2071 | } | |
2072 | ||
2073 | /****************************************************************************** | |
2074 | * ENDPT block | |
2075 | *****************************************************************************/ | |
2076 | /** | |
2077 | * ep_enable: configure endpoint, making it usable | |
2078 | * | |
2079 | * Check usb_ep_enable() at "usb_gadget.h" for details | |
2080 | */ | |
2081 | static int ep_enable(struct usb_ep *ep, | |
2082 | const struct usb_endpoint_descriptor *desc) | |
2083 | { | |
2084 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
ca9cfea0 | 2085 | int retval = 0; |
aa69a809 DL |
2086 | unsigned long flags; |
2087 | ||
aa69a809 DL |
2088 | if (ep == NULL || desc == NULL) |
2089 | return -EINVAL; | |
2090 | ||
2091 | spin_lock_irqsave(mEp->lock, flags); | |
2092 | ||
2093 | /* only internal SW should enable ctrl endpts */ | |
2094 | ||
31fb6014 | 2095 | mEp->ep.desc = desc; |
aa69a809 | 2096 | |
ca9cfea0 | 2097 | if (!list_empty(&mEp->qh.queue)) |
0f089094 | 2098 | dev_warn(mEp->udc->dev, "enabling a non-empty endpoint!\n"); |
aa69a809 | 2099 | |
15739bb5 MK |
2100 | mEp->dir = usb_endpoint_dir_in(desc) ? TX : RX; |
2101 | mEp->num = usb_endpoint_num(desc); | |
2102 | mEp->type = usb_endpoint_type(desc); | |
aa69a809 | 2103 | |
29cc8897 | 2104 | mEp->ep.maxpacket = usb_endpoint_maxp(desc); |
aa69a809 | 2105 | |
ca9cfea0 | 2106 | dbg_event(_usb_addr(mEp), "ENABLE", 0); |
aa69a809 | 2107 | |
ca9cfea0 | 2108 | mEp->qh.ptr->cap = 0; |
aa69a809 | 2109 | |
ca9cfea0 PK |
2110 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) |
2111 | mEp->qh.ptr->cap |= QH_IOS; | |
2112 | else if (mEp->type == USB_ENDPOINT_XFER_ISOC) | |
2113 | mEp->qh.ptr->cap &= ~QH_MULT; | |
2114 | else | |
2115 | mEp->qh.ptr->cap &= ~QH_ZLT; | |
aa69a809 | 2116 | |
ca9cfea0 PK |
2117 | mEp->qh.ptr->cap |= |
2118 | (mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT; | |
2119 | mEp->qh.ptr->td.next |= TD_TERMINATE; /* needed? */ | |
aa69a809 | 2120 | |
ac1aa6a2 A |
2121 | /* |
2122 | * Enable endpoints in the HW other than ep0 as ep0 | |
2123 | * is always enabled | |
2124 | */ | |
2125 | if (mEp->num) | |
d3595d13 | 2126 | retval |= hw_ep_enable(mEp->udc, mEp->num, mEp->dir, mEp->type); |
aa69a809 DL |
2127 | |
2128 | spin_unlock_irqrestore(mEp->lock, flags); | |
2129 | return retval; | |
2130 | } | |
2131 | ||
2132 | /** | |
2133 | * ep_disable: endpoint is no longer usable | |
2134 | * | |
2135 | * Check usb_ep_disable() at "usb_gadget.h" for details | |
2136 | */ | |
2137 | static int ep_disable(struct usb_ep *ep) | |
2138 | { | |
2139 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
2140 | int direction, retval = 0; | |
2141 | unsigned long flags; | |
2142 | ||
aa69a809 DL |
2143 | if (ep == NULL) |
2144 | return -EINVAL; | |
31fb6014 | 2145 | else if (mEp->ep.desc == NULL) |
aa69a809 DL |
2146 | return -EBUSY; |
2147 | ||
2148 | spin_lock_irqsave(mEp->lock, flags); | |
2149 | ||
2150 | /* only internal SW should disable ctrl endpts */ | |
2151 | ||
2152 | direction = mEp->dir; | |
2153 | do { | |
2154 | dbg_event(_usb_addr(mEp), "DISABLE", 0); | |
2155 | ||
2156 | retval |= _ep_nuke(mEp); | |
d3595d13 | 2157 | retval |= hw_ep_disable(mEp->udc, mEp->num, mEp->dir); |
aa69a809 DL |
2158 | |
2159 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) | |
2160 | mEp->dir = (mEp->dir == TX) ? RX : TX; | |
2161 | ||
2162 | } while (mEp->dir != direction); | |
2163 | ||
f9c56cdd | 2164 | mEp->ep.desc = NULL; |
aa69a809 DL |
2165 | |
2166 | spin_unlock_irqrestore(mEp->lock, flags); | |
2167 | return retval; | |
2168 | } | |
2169 | ||
2170 | /** | |
2171 | * ep_alloc_request: allocate a request object to use with this endpoint | |
2172 | * | |
2173 | * Check usb_ep_alloc_request() at "usb_gadget.h" for details | |
2174 | */ | |
2175 | static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) | |
2176 | { | |
2177 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
2178 | struct ci13xxx_req *mReq = NULL; | |
aa69a809 | 2179 | |
0f089094 | 2180 | if (ep == NULL) |
aa69a809 | 2181 | return NULL; |
aa69a809 | 2182 | |
aa69a809 DL |
2183 | mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags); |
2184 | if (mReq != NULL) { | |
2185 | INIT_LIST_HEAD(&mReq->queue); | |
954aad8c | 2186 | mReq->req.dma = DMA_ADDR_INVALID; |
aa69a809 DL |
2187 | |
2188 | mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags, | |
2189 | &mReq->dma); | |
2190 | if (mReq->ptr == NULL) { | |
2191 | kfree(mReq); | |
2192 | mReq = NULL; | |
2193 | } | |
2194 | } | |
2195 | ||
2196 | dbg_event(_usb_addr(mEp), "ALLOC", mReq == NULL); | |
2197 | ||
aa69a809 DL |
2198 | return (mReq == NULL) ? NULL : &mReq->req; |
2199 | } | |
2200 | ||
2201 | /** | |
2202 | * ep_free_request: frees a request object | |
2203 | * | |
2204 | * Check usb_ep_free_request() at "usb_gadget.h" for details | |
2205 | */ | |
2206 | static void ep_free_request(struct usb_ep *ep, struct usb_request *req) | |
2207 | { | |
2208 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
2209 | struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req); | |
2210 | unsigned long flags; | |
2211 | ||
aa69a809 | 2212 | if (ep == NULL || req == NULL) { |
aa69a809 DL |
2213 | return; |
2214 | } else if (!list_empty(&mReq->queue)) { | |
0f089094 | 2215 | dev_err(mEp->udc->dev, "freeing queued request\n"); |
aa69a809 DL |
2216 | return; |
2217 | } | |
2218 | ||
2219 | spin_lock_irqsave(mEp->lock, flags); | |
2220 | ||
2221 | if (mReq->ptr) | |
2222 | dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma); | |
2223 | kfree(mReq); | |
2224 | ||
2225 | dbg_event(_usb_addr(mEp), "FREE", 0); | |
2226 | ||
2227 | spin_unlock_irqrestore(mEp->lock, flags); | |
2228 | } | |
2229 | ||
2230 | /** | |
2231 | * ep_queue: queues (submits) an I/O request to an endpoint | |
2232 | * | |
2233 | * Check usb_ep_queue()* at usb_gadget.h" for details | |
2234 | */ | |
2235 | static int ep_queue(struct usb_ep *ep, struct usb_request *req, | |
2236 | gfp_t __maybe_unused gfp_flags) | |
2237 | { | |
2238 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
2239 | struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req); | |
1f339d84 | 2240 | struct ci13xxx *udc = mEp->udc; |
aa69a809 DL |
2241 | int retval = 0; |
2242 | unsigned long flags; | |
2243 | ||
31fb6014 | 2244 | if (ep == NULL || req == NULL || mEp->ep.desc == NULL) |
aa69a809 DL |
2245 | return -EINVAL; |
2246 | ||
2247 | spin_lock_irqsave(mEp->lock, flags); | |
2248 | ||
76cd9cfb PK |
2249 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) { |
2250 | if (req->length) | |
1f339d84 AS |
2251 | mEp = (udc->ep0_dir == RX) ? |
2252 | udc->ep0out : udc->ep0in; | |
76cd9cfb PK |
2253 | if (!list_empty(&mEp->qh.queue)) { |
2254 | _ep_nuke(mEp); | |
2255 | retval = -EOVERFLOW; | |
0f089094 AS |
2256 | dev_warn(mEp->udc->dev, "endpoint ctrl %X nuked\n", |
2257 | _usb_addr(mEp)); | |
76cd9cfb | 2258 | } |
aa69a809 DL |
2259 | } |
2260 | ||
2261 | /* first nuke then test link, e.g. previous status has not sent */ | |
2262 | if (!list_empty(&mReq->queue)) { | |
2263 | retval = -EBUSY; | |
0f089094 | 2264 | dev_err(mEp->udc->dev, "request already in queue\n"); |
aa69a809 DL |
2265 | goto done; |
2266 | } | |
2267 | ||
1155a7b8 AS |
2268 | if (req->length > 4 * CI13XXX_PAGE_SIZE) { |
2269 | req->length = 4 * CI13XXX_PAGE_SIZE; | |
aa69a809 | 2270 | retval = -EMSGSIZE; |
0f089094 | 2271 | dev_warn(mEp->udc->dev, "request length truncated\n"); |
aa69a809 DL |
2272 | } |
2273 | ||
2274 | dbg_queue(_usb_addr(mEp), req, retval); | |
2275 | ||
2276 | /* push request */ | |
2277 | mReq->req.status = -EINPROGRESS; | |
2278 | mReq->req.actual = 0; | |
aa69a809 | 2279 | |
0e6ca199 | 2280 | retval = _hardware_enqueue(mEp, mReq); |
d9bb9c18 AL |
2281 | |
2282 | if (retval == -EALREADY) { | |
aa69a809 DL |
2283 | dbg_event(_usb_addr(mEp), "QUEUE", retval); |
2284 | retval = 0; | |
2285 | } | |
0e6ca199 PK |
2286 | if (!retval) |
2287 | list_add_tail(&mReq->queue, &mEp->qh.queue); | |
aa69a809 DL |
2288 | |
2289 | done: | |
2290 | spin_unlock_irqrestore(mEp->lock, flags); | |
2291 | return retval; | |
2292 | } | |
2293 | ||
2294 | /** | |
2295 | * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint | |
2296 | * | |
2297 | * Check usb_ep_dequeue() at "usb_gadget.h" for details | |
2298 | */ | |
2299 | static int ep_dequeue(struct usb_ep *ep, struct usb_request *req) | |
2300 | { | |
2301 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
2302 | struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req); | |
2303 | unsigned long flags; | |
2304 | ||
0e6ca199 | 2305 | if (ep == NULL || req == NULL || mReq->req.status != -EALREADY || |
31fb6014 | 2306 | mEp->ep.desc == NULL || list_empty(&mReq->queue) || |
0e6ca199 | 2307 | list_empty(&mEp->qh.queue)) |
aa69a809 DL |
2308 | return -EINVAL; |
2309 | ||
2310 | spin_lock_irqsave(mEp->lock, flags); | |
2311 | ||
2312 | dbg_event(_usb_addr(mEp), "DEQUEUE", 0); | |
2313 | ||
d3595d13 | 2314 | hw_ep_flush(mEp->udc, mEp->num, mEp->dir); |
aa69a809 DL |
2315 | |
2316 | /* pop request */ | |
2317 | list_del_init(&mReq->queue); | |
0e6ca199 PK |
2318 | if (mReq->map) { |
2319 | dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length, | |
2320 | mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
954aad8c | 2321 | mReq->req.dma = DMA_ADDR_INVALID; |
0e6ca199 PK |
2322 | mReq->map = 0; |
2323 | } | |
aa69a809 DL |
2324 | req->status = -ECONNRESET; |
2325 | ||
7c25a826 | 2326 | if (mReq->req.complete != NULL) { |
aa69a809 DL |
2327 | spin_unlock(mEp->lock); |
2328 | mReq->req.complete(&mEp->ep, &mReq->req); | |
2329 | spin_lock(mEp->lock); | |
2330 | } | |
2331 | ||
2332 | spin_unlock_irqrestore(mEp->lock, flags); | |
2333 | return 0; | |
2334 | } | |
2335 | ||
2336 | /** | |
2337 | * ep_set_halt: sets the endpoint halt feature | |
2338 | * | |
2339 | * Check usb_ep_set_halt() at "usb_gadget.h" for details | |
2340 | */ | |
2341 | static int ep_set_halt(struct usb_ep *ep, int value) | |
2342 | { | |
2343 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
2344 | int direction, retval = 0; | |
2345 | unsigned long flags; | |
2346 | ||
31fb6014 | 2347 | if (ep == NULL || mEp->ep.desc == NULL) |
aa69a809 DL |
2348 | return -EINVAL; |
2349 | ||
2350 | spin_lock_irqsave(mEp->lock, flags); | |
2351 | ||
2352 | #ifndef STALL_IN | |
2353 | /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */ | |
2354 | if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX && | |
ca9cfea0 | 2355 | !list_empty(&mEp->qh.queue)) { |
aa69a809 DL |
2356 | spin_unlock_irqrestore(mEp->lock, flags); |
2357 | return -EAGAIN; | |
2358 | } | |
2359 | #endif | |
2360 | ||
2361 | direction = mEp->dir; | |
2362 | do { | |
2363 | dbg_event(_usb_addr(mEp), "HALT", value); | |
d3595d13 | 2364 | retval |= hw_ep_set_halt(mEp->udc, mEp->num, mEp->dir, value); |
aa69a809 DL |
2365 | |
2366 | if (!value) | |
2367 | mEp->wedge = 0; | |
2368 | ||
2369 | if (mEp->type == USB_ENDPOINT_XFER_CONTROL) | |
2370 | mEp->dir = (mEp->dir == TX) ? RX : TX; | |
2371 | ||
2372 | } while (mEp->dir != direction); | |
2373 | ||
2374 | spin_unlock_irqrestore(mEp->lock, flags); | |
2375 | return retval; | |
2376 | } | |
2377 | ||
2378 | /** | |
2379 | * ep_set_wedge: sets the halt feature and ignores clear requests | |
2380 | * | |
2381 | * Check usb_ep_set_wedge() at "usb_gadget.h" for details | |
2382 | */ | |
2383 | static int ep_set_wedge(struct usb_ep *ep) | |
2384 | { | |
2385 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
2386 | unsigned long flags; | |
2387 | ||
31fb6014 | 2388 | if (ep == NULL || mEp->ep.desc == NULL) |
aa69a809 DL |
2389 | return -EINVAL; |
2390 | ||
2391 | spin_lock_irqsave(mEp->lock, flags); | |
2392 | ||
2393 | dbg_event(_usb_addr(mEp), "WEDGE", 0); | |
2394 | mEp->wedge = 1; | |
2395 | ||
2396 | spin_unlock_irqrestore(mEp->lock, flags); | |
2397 | ||
2398 | return usb_ep_set_halt(ep); | |
2399 | } | |
2400 | ||
2401 | /** | |
2402 | * ep_fifo_flush: flushes contents of a fifo | |
2403 | * | |
2404 | * Check usb_ep_fifo_flush() at "usb_gadget.h" for details | |
2405 | */ | |
2406 | static void ep_fifo_flush(struct usb_ep *ep) | |
2407 | { | |
2408 | struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep); | |
2409 | unsigned long flags; | |
2410 | ||
aa69a809 | 2411 | if (ep == NULL) { |
0f089094 | 2412 | dev_err(mEp->udc->dev, "%02X: -EINVAL\n", _usb_addr(mEp)); |
aa69a809 DL |
2413 | return; |
2414 | } | |
2415 | ||
2416 | spin_lock_irqsave(mEp->lock, flags); | |
2417 | ||
2418 | dbg_event(_usb_addr(mEp), "FFLUSH", 0); | |
d3595d13 | 2419 | hw_ep_flush(mEp->udc, mEp->num, mEp->dir); |
aa69a809 DL |
2420 | |
2421 | spin_unlock_irqrestore(mEp->lock, flags); | |
2422 | } | |
2423 | ||
2424 | /** | |
2425 | * Endpoint-specific part of the API to the USB controller hardware | |
2426 | * Check "usb_gadget.h" for details | |
2427 | */ | |
2428 | static const struct usb_ep_ops usb_ep_ops = { | |
2429 | .enable = ep_enable, | |
2430 | .disable = ep_disable, | |
2431 | .alloc_request = ep_alloc_request, | |
2432 | .free_request = ep_free_request, | |
2433 | .queue = ep_queue, | |
2434 | .dequeue = ep_dequeue, | |
2435 | .set_halt = ep_set_halt, | |
2436 | .set_wedge = ep_set_wedge, | |
2437 | .fifo_flush = ep_fifo_flush, | |
2438 | }; | |
2439 | ||
2440 | /****************************************************************************** | |
2441 | * GADGET block | |
2442 | *****************************************************************************/ | |
f01ef574 PK |
2443 | static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active) |
2444 | { | |
2445 | struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget); | |
2446 | unsigned long flags; | |
2447 | int gadget_ready = 0; | |
2448 | ||
2449 | if (!(udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS)) | |
2450 | return -EOPNOTSUPP; | |
2451 | ||
d3595d13 | 2452 | spin_lock_irqsave(&udc->lock, flags); |
f01ef574 PK |
2453 | udc->vbus_active = is_active; |
2454 | if (udc->driver) | |
2455 | gadget_ready = 1; | |
d3595d13 | 2456 | spin_unlock_irqrestore(&udc->lock, flags); |
f01ef574 PK |
2457 | |
2458 | if (gadget_ready) { | |
2459 | if (is_active) { | |
c036019e | 2460 | pm_runtime_get_sync(&_gadget->dev); |
f01ef574 | 2461 | hw_device_reset(udc); |
d3595d13 | 2462 | hw_device_state(udc, udc->ep0out->qh.dma); |
f01ef574 | 2463 | } else { |
d3595d13 | 2464 | hw_device_state(udc, 0); |
f01ef574 PK |
2465 | if (udc->udc_driver->notify_event) |
2466 | udc->udc_driver->notify_event(udc, | |
2467 | CI13XXX_CONTROLLER_STOPPED_EVENT); | |
2468 | _gadget_stop_activity(&udc->gadget); | |
c036019e | 2469 | pm_runtime_put_sync(&_gadget->dev); |
f01ef574 PK |
2470 | } |
2471 | } | |
2472 | ||
2473 | return 0; | |
2474 | } | |
2475 | ||
e2b61c1d PK |
2476 | static int ci13xxx_wakeup(struct usb_gadget *_gadget) |
2477 | { | |
2478 | struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget); | |
2479 | unsigned long flags; | |
2480 | int ret = 0; | |
2481 | ||
d3595d13 | 2482 | spin_lock_irqsave(&udc->lock, flags); |
e2b61c1d PK |
2483 | if (!udc->remote_wakeup) { |
2484 | ret = -EOPNOTSUPP; | |
e2b61c1d PK |
2485 | goto out; |
2486 | } | |
262c1632 | 2487 | if (!hw_read(udc, OP_PORTSC, PORTSC_SUSP)) { |
e2b61c1d | 2488 | ret = -EINVAL; |
e2b61c1d PK |
2489 | goto out; |
2490 | } | |
262c1632 | 2491 | hw_write(udc, OP_PORTSC, PORTSC_FPR, PORTSC_FPR); |
e2b61c1d | 2492 | out: |
d3595d13 | 2493 | spin_unlock_irqrestore(&udc->lock, flags); |
e2b61c1d PK |
2494 | return ret; |
2495 | } | |
2496 | ||
d860852e PK |
2497 | static int ci13xxx_vbus_draw(struct usb_gadget *_gadget, unsigned mA) |
2498 | { | |
2499 | struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget); | |
2500 | ||
2501 | if (udc->transceiver) | |
b96d3b08 | 2502 | return usb_phy_set_power(udc->transceiver, mA); |
d860852e PK |
2503 | return -ENOTSUPP; |
2504 | } | |
2505 | ||
1f339d84 AS |
2506 | static int ci13xxx_start(struct usb_gadget *gadget, |
2507 | struct usb_gadget_driver *driver); | |
2508 | static int ci13xxx_stop(struct usb_gadget *gadget, | |
2509 | struct usb_gadget_driver *driver); | |
aa69a809 DL |
2510 | /** |
2511 | * Device operations part of the API to the USB controller hardware, | |
2512 | * which don't involve endpoints (or i/o) | |
2513 | * Check "usb_gadget.h" for details | |
2514 | */ | |
f01ef574 PK |
2515 | static const struct usb_gadget_ops usb_gadget_ops = { |
2516 | .vbus_session = ci13xxx_vbus_session, | |
e2b61c1d | 2517 | .wakeup = ci13xxx_wakeup, |
d860852e | 2518 | .vbus_draw = ci13xxx_vbus_draw, |
1f339d84 AS |
2519 | .udc_start = ci13xxx_start, |
2520 | .udc_stop = ci13xxx_stop, | |
f01ef574 | 2521 | }; |
aa69a809 | 2522 | |
790c2d52 | 2523 | static int init_eps(struct ci13xxx *udc) |
aa69a809 | 2524 | { |
790c2d52 | 2525 | int retval = 0, i, j; |
aa69a809 | 2526 | |
790c2d52 | 2527 | for (i = 0; i < udc->hw_ep_max/2; i++) |
ca9cfea0 | 2528 | for (j = RX; j <= TX; j++) { |
d3595d13 | 2529 | int k = i + j * udc->hw_ep_max/2; |
ca9cfea0 | 2530 | struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[k]; |
aa69a809 | 2531 | |
ca9cfea0 PK |
2532 | scnprintf(mEp->name, sizeof(mEp->name), "ep%i%s", i, |
2533 | (j == TX) ? "in" : "out"); | |
aa69a809 | 2534 | |
d3595d13 AS |
2535 | mEp->udc = udc; |
2536 | mEp->lock = &udc->lock; | |
ca9cfea0 PK |
2537 | mEp->device = &udc->gadget.dev; |
2538 | mEp->td_pool = udc->td_pool; | |
aa69a809 | 2539 | |
ca9cfea0 PK |
2540 | mEp->ep.name = mEp->name; |
2541 | mEp->ep.ops = &usb_ep_ops; | |
2542 | mEp->ep.maxpacket = CTRL_PAYLOAD_MAX; | |
aa69a809 | 2543 | |
ca9cfea0 | 2544 | INIT_LIST_HEAD(&mEp->qh.queue); |
ca9cfea0 | 2545 | mEp->qh.ptr = dma_pool_alloc(udc->qh_pool, GFP_KERNEL, |
790c2d52 | 2546 | &mEp->qh.dma); |
ca9cfea0 | 2547 | if (mEp->qh.ptr == NULL) |
aa69a809 DL |
2548 | retval = -ENOMEM; |
2549 | else | |
ca9cfea0 PK |
2550 | memset(mEp->qh.ptr, 0, sizeof(*mEp->qh.ptr)); |
2551 | ||
d36ade60 AS |
2552 | /* |
2553 | * set up shorthands for ep0 out and in endpoints, | |
2554 | * don't add to gadget's ep_list | |
2555 | */ | |
2556 | if (i == 0) { | |
2557 | if (j == RX) | |
2558 | udc->ep0out = mEp; | |
2559 | else | |
2560 | udc->ep0in = mEp; | |
2561 | ||
ca9cfea0 | 2562 | continue; |
d36ade60 | 2563 | } |
ca9cfea0 | 2564 | |
aa69a809 | 2565 | list_add_tail(&mEp->ep.ep_list, &udc->gadget.ep_list); |
ca9cfea0 | 2566 | } |
790c2d52 AS |
2567 | |
2568 | return retval; | |
2569 | } | |
2570 | ||
2571 | /** | |
2572 | * ci13xxx_start: register a gadget driver | |
1f339d84 | 2573 | * @gadget: our gadget |
790c2d52 | 2574 | * @driver: the driver being registered |
790c2d52 | 2575 | * |
790c2d52 AS |
2576 | * Interrupts are enabled here. |
2577 | */ | |
1f339d84 AS |
2578 | static int ci13xxx_start(struct usb_gadget *gadget, |
2579 | struct usb_gadget_driver *driver) | |
790c2d52 | 2580 | { |
1f339d84 | 2581 | struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget); |
790c2d52 | 2582 | unsigned long flags; |
790c2d52 AS |
2583 | int retval = -ENOMEM; |
2584 | ||
1f339d84 | 2585 | if (driver->disconnect == NULL) |
790c2d52 | 2586 | return -EINVAL; |
790c2d52 | 2587 | |
790c2d52 | 2588 | |
d36ade60 AS |
2589 | udc->ep0out->ep.desc = &ctrl_endpt_out_desc; |
2590 | retval = usb_ep_enable(&udc->ep0out->ep); | |
ac1aa6a2 A |
2591 | if (retval) |
2592 | return retval; | |
877c1f54 | 2593 | |
d36ade60 AS |
2594 | udc->ep0in->ep.desc = &ctrl_endpt_in_desc; |
2595 | retval = usb_ep_enable(&udc->ep0in->ep); | |
ac1aa6a2 A |
2596 | if (retval) |
2597 | return retval; | |
d3595d13 | 2598 | spin_lock_irqsave(&udc->lock, flags); |
aa69a809 | 2599 | |
49d3df53 | 2600 | udc->driver = driver; |
c036019e | 2601 | pm_runtime_get_sync(&udc->gadget.dev); |
f01ef574 PK |
2602 | if (udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS) { |
2603 | if (udc->vbus_active) { | |
2604 | if (udc->udc_driver->flags & CI13XXX_REGS_SHARED) | |
2605 | hw_device_reset(udc); | |
2606 | } else { | |
c036019e | 2607 | pm_runtime_put_sync(&udc->gadget.dev); |
f01ef574 PK |
2608 | goto done; |
2609 | } | |
2610 | } | |
2611 | ||
d3595d13 | 2612 | retval = hw_device_state(udc, udc->ep0out->qh.dma); |
c036019e PK |
2613 | if (retval) |
2614 | pm_runtime_put_sync(&udc->gadget.dev); | |
aa69a809 DL |
2615 | |
2616 | done: | |
d3595d13 | 2617 | spin_unlock_irqrestore(&udc->lock, flags); |
aa69a809 DL |
2618 | return retval; |
2619 | } | |
aa69a809 DL |
2620 | |
2621 | /** | |
0f91349b | 2622 | * ci13xxx_stop: unregister a gadget driver |
aa69a809 | 2623 | */ |
1f339d84 AS |
2624 | static int ci13xxx_stop(struct usb_gadget *gadget, |
2625 | struct usb_gadget_driver *driver) | |
aa69a809 | 2626 | { |
1f339d84 AS |
2627 | struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget); |
2628 | unsigned long flags; | |
aa69a809 | 2629 | |
d3595d13 | 2630 | spin_lock_irqsave(&udc->lock, flags); |
aa69a809 | 2631 | |
f01ef574 PK |
2632 | if (!(udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS) || |
2633 | udc->vbus_active) { | |
d3595d13 | 2634 | hw_device_state(udc, 0); |
f01ef574 PK |
2635 | if (udc->udc_driver->notify_event) |
2636 | udc->udc_driver->notify_event(udc, | |
2637 | CI13XXX_CONTROLLER_STOPPED_EVENT); | |
1f339d84 | 2638 | udc->driver = NULL; |
d3595d13 | 2639 | spin_unlock_irqrestore(&udc->lock, flags); |
aa69a809 | 2640 | _gadget_stop_activity(&udc->gadget); |
d3595d13 | 2641 | spin_lock_irqsave(&udc->lock, flags); |
c036019e | 2642 | pm_runtime_put(&udc->gadget.dev); |
f01ef574 | 2643 | } |
aa69a809 | 2644 | |
d3595d13 | 2645 | spin_unlock_irqrestore(&udc->lock, flags); |
aa69a809 | 2646 | |
aa69a809 DL |
2647 | return 0; |
2648 | } | |
aa69a809 DL |
2649 | |
2650 | /****************************************************************************** | |
2651 | * BUS block | |
2652 | *****************************************************************************/ | |
2653 | /** | |
2654 | * udc_irq: global interrupt handler | |
2655 | * | |
2656 | * This function returns IRQ_HANDLED if the IRQ has been handled | |
2657 | * It locks access to registers | |
2658 | */ | |
62bb84ed | 2659 | static irqreturn_t udc_irq(int irq, void *data) |
aa69a809 | 2660 | { |
1f339d84 | 2661 | struct ci13xxx *udc = data; |
aa69a809 DL |
2662 | irqreturn_t retval; |
2663 | u32 intr; | |
2664 | ||
f639554b | 2665 | if (udc == NULL) |
aa69a809 | 2666 | return IRQ_HANDLED; |
aa69a809 | 2667 | |
d3595d13 | 2668 | spin_lock(&udc->lock); |
f01ef574 PK |
2669 | |
2670 | if (udc->udc_driver->flags & CI13XXX_REGS_SHARED) { | |
262c1632 AS |
2671 | if (hw_read(udc, OP_USBMODE, USBMODE_CM) != |
2672 | USBMODE_CM_DEVICE) { | |
d3595d13 | 2673 | spin_unlock(&udc->lock); |
f01ef574 PK |
2674 | return IRQ_NONE; |
2675 | } | |
2676 | } | |
d3595d13 | 2677 | intr = hw_test_and_clear_intr_active(udc); |
aa69a809 DL |
2678 | if (intr) { |
2679 | isr_statistics.hndl.buf[isr_statistics.hndl.idx++] = intr; | |
2680 | isr_statistics.hndl.idx &= ISR_MASK; | |
2681 | isr_statistics.hndl.cnt++; | |
2682 | ||
2683 | /* order defines priority - do NOT change it */ | |
2684 | if (USBi_URI & intr) { | |
2685 | isr_statistics.uri++; | |
2686 | isr_reset_handler(udc); | |
2687 | } | |
2688 | if (USBi_PCI & intr) { | |
2689 | isr_statistics.pci++; | |
d3595d13 | 2690 | udc->gadget.speed = hw_port_is_high_speed(udc) ? |
aa69a809 | 2691 | USB_SPEED_HIGH : USB_SPEED_FULL; |
7bb4fdc6 | 2692 | if (udc->suspended && udc->driver->resume) { |
d3595d13 | 2693 | spin_unlock(&udc->lock); |
e2b61c1d | 2694 | udc->driver->resume(&udc->gadget); |
d3595d13 | 2695 | spin_lock(&udc->lock); |
e2b61c1d PK |
2696 | udc->suspended = 0; |
2697 | } | |
aa69a809 DL |
2698 | } |
2699 | if (USBi_UEI & intr) | |
2700 | isr_statistics.uei++; | |
2701 | if (USBi_UI & intr) { | |
2702 | isr_statistics.ui++; | |
2703 | isr_tr_complete_handler(udc); | |
2704 | } | |
e2b61c1d | 2705 | if (USBi_SLI & intr) { |
7bb4fdc6 MKB |
2706 | if (udc->gadget.speed != USB_SPEED_UNKNOWN && |
2707 | udc->driver->suspend) { | |
e2b61c1d | 2708 | udc->suspended = 1; |
d3595d13 | 2709 | spin_unlock(&udc->lock); |
e2b61c1d | 2710 | udc->driver->suspend(&udc->gadget); |
d3595d13 | 2711 | spin_lock(&udc->lock); |
e2b61c1d | 2712 | } |
aa69a809 | 2713 | isr_statistics.sli++; |
e2b61c1d | 2714 | } |
aa69a809 DL |
2715 | retval = IRQ_HANDLED; |
2716 | } else { | |
2717 | isr_statistics.none++; | |
2718 | retval = IRQ_NONE; | |
2719 | } | |
d3595d13 | 2720 | spin_unlock(&udc->lock); |
aa69a809 DL |
2721 | |
2722 | return retval; | |
2723 | } | |
2724 | ||
2725 | /** | |
2726 | * udc_release: driver release function | |
2727 | * @dev: device | |
2728 | * | |
2729 | * Currently does nothing | |
2730 | */ | |
2731 | static void udc_release(struct device *dev) | |
2732 | { | |
aa69a809 DL |
2733 | } |
2734 | ||
2735 | /** | |
2736 | * udc_probe: parent probe must call this to initialize UDC | |
2737 | * @dev: parent device | |
2738 | * @regs: registers base address | |
2739 | * @name: driver name | |
2740 | * | |
2741 | * This function returns an error code | |
2742 | * No interrupts active, the IRQ has not been requested yet | |
2743 | * Kernel assumes 32-bit DMA operations by default, no need to dma_set_mask | |
2744 | */ | |
f01ef574 | 2745 | static int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev, |
1f339d84 | 2746 | void __iomem *regs, struct ci13xxx **_udc) |
aa69a809 DL |
2747 | { |
2748 | struct ci13xxx *udc; | |
2749 | int retval = 0; | |
2750 | ||
f01ef574 PK |
2751 | if (dev == NULL || regs == NULL || driver == NULL || |
2752 | driver->name == NULL) | |
aa69a809 DL |
2753 | return -EINVAL; |
2754 | ||
2755 | udc = kzalloc(sizeof(struct ci13xxx), GFP_KERNEL); | |
2756 | if (udc == NULL) | |
2757 | return -ENOMEM; | |
2758 | ||
d3595d13 | 2759 | spin_lock_init(&udc->lock); |
f01ef574 PK |
2760 | udc->regs = regs; |
2761 | udc->udc_driver = driver; | |
aa69a809 | 2762 | |
f01ef574 | 2763 | udc->gadget.ops = &usb_gadget_ops; |
aa69a809 | 2764 | udc->gadget.speed = USB_SPEED_UNKNOWN; |
d327ab5b | 2765 | udc->gadget.max_speed = USB_SPEED_HIGH; |
aa69a809 | 2766 | udc->gadget.is_otg = 0; |
f01ef574 | 2767 | udc->gadget.name = driver->name; |
aa69a809 DL |
2768 | |
2769 | INIT_LIST_HEAD(&udc->gadget.ep_list); | |
aa69a809 | 2770 | |
5df58524 | 2771 | dev_set_name(&udc->gadget.dev, "gadget"); |
aa69a809 | 2772 | udc->gadget.dev.dma_mask = dev->dma_mask; |
61948ee4 | 2773 | udc->gadget.dev.coherent_dma_mask = dev->coherent_dma_mask; |
aa69a809 DL |
2774 | udc->gadget.dev.parent = dev; |
2775 | udc->gadget.dev.release = udc_release; | |
2776 | ||
0f089094 AS |
2777 | udc->dev = dev; |
2778 | ||
790c2d52 AS |
2779 | /* alloc resources */ |
2780 | udc->qh_pool = dma_pool_create("ci13xxx_qh", dev, | |
2781 | sizeof(struct ci13xxx_qh), | |
2782 | 64, CI13XXX_PAGE_SIZE); | |
2783 | if (udc->qh_pool == NULL) { | |
2784 | retval = -ENOMEM; | |
2785 | goto free_udc; | |
2786 | } | |
2787 | ||
2788 | udc->td_pool = dma_pool_create("ci13xxx_td", dev, | |
2789 | sizeof(struct ci13xxx_td), | |
2790 | 64, CI13XXX_PAGE_SIZE); | |
2791 | if (udc->td_pool == NULL) { | |
2792 | retval = -ENOMEM; | |
2793 | goto free_qh_pool; | |
2794 | } | |
2795 | ||
62bb84ed | 2796 | retval = hw_device_init(udc, regs, driver->capoffset); |
f01ef574 | 2797 | if (retval < 0) |
790c2d52 AS |
2798 | goto free_pools; |
2799 | ||
2800 | retval = init_eps(udc); | |
2801 | if (retval) | |
2802 | goto free_pools; | |
2803 | ||
2804 | udc->gadget.ep0 = &udc->ep0in->ep; | |
f01ef574 | 2805 | |
b96d3b08 | 2806 | udc->transceiver = usb_get_transceiver(); |
f01ef574 PK |
2807 | |
2808 | if (udc->udc_driver->flags & CI13XXX_REQUIRE_TRANSCEIVER) { | |
2809 | if (udc->transceiver == NULL) { | |
2810 | retval = -ENODEV; | |
790c2d52 | 2811 | goto free_pools; |
f01ef574 PK |
2812 | } |
2813 | } | |
2814 | ||
2815 | if (!(udc->udc_driver->flags & CI13XXX_REGS_SHARED)) { | |
2816 | retval = hw_device_reset(udc); | |
2817 | if (retval) | |
2818 | goto put_transceiver; | |
2819 | } | |
2820 | ||
aa69a809 | 2821 | retval = device_register(&udc->gadget.dev); |
f01ef574 PK |
2822 | if (retval) { |
2823 | put_device(&udc->gadget.dev); | |
2824 | goto put_transceiver; | |
2825 | } | |
aa69a809 DL |
2826 | |
2827 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
2828 | retval = dbg_create_files(&udc->gadget.dev); | |
2829 | #endif | |
f01ef574 PK |
2830 | if (retval) |
2831 | goto unreg_device; | |
2832 | ||
2833 | if (udc->transceiver) { | |
6e13c650 HK |
2834 | retval = otg_set_peripheral(udc->transceiver->otg, |
2835 | &udc->gadget); | |
f01ef574 PK |
2836 | if (retval) |
2837 | goto remove_dbg; | |
aa69a809 | 2838 | } |
0f91349b SAS |
2839 | |
2840 | retval = usb_add_gadget_udc(dev, &udc->gadget); | |
2841 | if (retval) | |
2842 | goto remove_trans; | |
2843 | ||
c036019e PK |
2844 | pm_runtime_no_callbacks(&udc->gadget.dev); |
2845 | pm_runtime_enable(&udc->gadget.dev); | |
aa69a809 | 2846 | |
1f339d84 | 2847 | *_udc = udc; |
aa69a809 DL |
2848 | return retval; |
2849 | ||
0f91349b SAS |
2850 | remove_trans: |
2851 | if (udc->transceiver) { | |
6e13c650 | 2852 | otg_set_peripheral(udc->transceiver->otg, &udc->gadget); |
b96d3b08 | 2853 | usb_put_transceiver(udc->transceiver); |
0f91349b SAS |
2854 | } |
2855 | ||
0917ba84 | 2856 | dev_err(dev, "error = %i\n", retval); |
f01ef574 PK |
2857 | remove_dbg: |
2858 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES | |
2859 | dbg_remove_files(&udc->gadget.dev); | |
2860 | #endif | |
2861 | unreg_device: | |
2862 | device_unregister(&udc->gadget.dev); | |
2863 | put_transceiver: | |
2864 | if (udc->transceiver) | |
b96d3b08 | 2865 | usb_put_transceiver(udc->transceiver); |
790c2d52 AS |
2866 | free_pools: |
2867 | dma_pool_destroy(udc->td_pool); | |
2868 | free_qh_pool: | |
2869 | dma_pool_destroy(udc->qh_pool); | |
f01ef574 | 2870 | free_udc: |
aa69a809 | 2871 | kfree(udc); |
1f339d84 | 2872 | *_udc = NULL; |
aa69a809 DL |
2873 | return retval; |
2874 | } | |
2875 | ||
2876 | /** | |
2877 | * udc_remove: parent remove must call this to remove UDC | |
2878 | * | |
2879 | * No interrupts active, the IRQ has been released | |
2880 | */ | |
1f339d84 | 2881 | static void udc_remove(struct ci13xxx *udc) |
aa69a809 | 2882 | { |
790c2d52 | 2883 | int i; |
aa69a809 | 2884 | |
0f089094 | 2885 | if (udc == NULL) |
aa69a809 | 2886 | return; |
0f089094 | 2887 | |
0f91349b | 2888 | usb_del_gadget_udc(&udc->gadget); |
aa69a809 | 2889 | |
790c2d52 AS |
2890 | for (i = 0; i < udc->hw_ep_max; i++) { |
2891 | struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i]; | |
2892 | ||
2893 | dma_pool_free(udc->qh_pool, mEp->qh.ptr, mEp->qh.dma); | |
2894 | } | |
2895 | ||
2896 | dma_pool_destroy(udc->td_pool); | |
2897 | dma_pool_destroy(udc->qh_pool); | |
2898 | ||
f01ef574 | 2899 | if (udc->transceiver) { |
6e13c650 | 2900 | otg_set_peripheral(udc->transceiver->otg, &udc->gadget); |
b96d3b08 | 2901 | usb_put_transceiver(udc->transceiver); |
f01ef574 | 2902 | } |
aa69a809 DL |
2903 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
2904 | dbg_remove_files(&udc->gadget.dev); | |
2905 | #endif | |
2906 | device_unregister(&udc->gadget.dev); | |
2907 | ||
262c1632 | 2908 | kfree(udc->hw_bank.regmap); |
aa69a809 | 2909 | kfree(udc); |
aa69a809 | 2910 | } |
62bb84ed AS |
2911 | |
2912 | static int __devinit ci_udc_probe(struct platform_device *pdev) | |
2913 | { | |
2914 | struct device *dev = &pdev->dev; | |
2915 | struct ci13xxx_udc_driver *driver = dev->platform_data; | |
1f339d84 | 2916 | struct ci13xxx *udc; |
62bb84ed AS |
2917 | struct resource *res; |
2918 | void __iomem *base; | |
2919 | int ret; | |
2920 | ||
2921 | if (!driver) { | |
2922 | dev_err(dev, "platform data missing\n"); | |
2923 | return -ENODEV; | |
2924 | } | |
2925 | ||
2926 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2927 | if (!res) { | |
2928 | dev_err(dev, "missing resource\n"); | |
2929 | return -ENODEV; | |
2930 | } | |
2931 | ||
2932 | base = devm_request_and_ioremap(dev, res); | |
2933 | if (!res) { | |
2934 | dev_err(dev, "can't request and ioremap resource\n"); | |
2935 | return -ENOMEM; | |
2936 | } | |
2937 | ||
1f339d84 | 2938 | ret = udc_probe(driver, dev, base, &udc); |
62bb84ed AS |
2939 | if (ret) |
2940 | return ret; | |
2941 | ||
1f339d84 AS |
2942 | udc->irq = platform_get_irq(pdev, 0); |
2943 | if (udc->irq < 0) { | |
62bb84ed AS |
2944 | dev_err(dev, "missing IRQ\n"); |
2945 | ret = -ENODEV; | |
2946 | goto out; | |
2947 | } | |
2948 | ||
1f339d84 AS |
2949 | platform_set_drvdata(pdev, udc); |
2950 | ret = request_irq(udc->irq, udc_irq, IRQF_SHARED, driver->name, udc); | |
62bb84ed AS |
2951 | |
2952 | out: | |
2953 | if (ret) | |
1f339d84 | 2954 | udc_remove(udc); |
62bb84ed AS |
2955 | |
2956 | return ret; | |
2957 | } | |
2958 | ||
2959 | static int __devexit ci_udc_remove(struct platform_device *pdev) | |
2960 | { | |
1f339d84 AS |
2961 | struct ci13xxx *udc = platform_get_drvdata(pdev); |
2962 | ||
2963 | free_irq(udc->irq, udc); | |
2964 | udc_remove(udc); | |
62bb84ed AS |
2965 | |
2966 | return 0; | |
2967 | } | |
2968 | ||
2969 | static struct platform_driver ci_udc_driver = { | |
2970 | .probe = ci_udc_probe, | |
2971 | .remove = __devexit_p(ci_udc_remove), | |
2972 | .driver = { | |
2973 | .name = "ci_udc", | |
2974 | }, | |
2975 | }; | |
2976 | ||
2977 | module_platform_driver(ci_udc_driver); | |
2978 | ||
2979 | MODULE_ALIAS("platform:ci_udc"); | |
2980 | MODULE_ALIAS("platform:ci13xxx"); | |
2981 | MODULE_LICENSE("GPL v2"); | |
2982 | MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>"); | |
2983 | MODULE_DESCRIPTION("ChipIdea UDC Driver"); |