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Commit | Line | Data |
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e443b333 AS |
1 | /* |
2 | * core.c - ChipIdea 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: ChipIdea USB IP core family device controller | |
15 | * | |
16 | * This driver is composed of several blocks: | |
17 | * - HW: hardware interface | |
18 | * - DBG: debug facilities (optional) | |
19 | * - UTIL: utilities | |
20 | * - ISR: interrupts handling | |
21 | * - ENDPT: endpoint operations (Gadget API) | |
22 | * - GADGET: gadget operations (Gadget API) | |
23 | * - BUS: bus glue code, bus abstraction layer | |
24 | * | |
25 | * Compile Options | |
e443b333 AS |
26 | * - STALL_IN: non-empty bulk-in pipes cannot be halted |
27 | * if defined mass storage compliance succeeds but with warnings | |
28 | * => case 4: Hi > Dn | |
29 | * => case 5: Hi > Di | |
30 | * => case 8: Hi <> Do | |
31 | * if undefined usbtest 13 fails | |
32 | * - TRACE: enable function tracing (depends on DEBUG) | |
33 | * | |
34 | * Main Features | |
35 | * - Chapter 9 & Mass Storage Compliance with Gadget File Storage | |
36 | * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined) | |
37 | * - Normal & LPM support | |
38 | * | |
39 | * USBTEST Report | |
40 | * - OK: 0-12, 13 (STALL_IN defined) & 14 | |
41 | * - Not Supported: 15 & 16 (ISO) | |
42 | * | |
43 | * TODO List | |
e443b333 AS |
44 | * - Suspend & Remote Wakeup |
45 | */ | |
46 | #include <linux/delay.h> | |
47 | #include <linux/device.h> | |
e443b333 | 48 | #include <linux/dma-mapping.h> |
3ecb3e09 | 49 | #include <linux/extcon.h> |
1e5e2d3d | 50 | #include <linux/phy/phy.h> |
e443b333 AS |
51 | #include <linux/platform_device.h> |
52 | #include <linux/module.h> | |
fe6e125e | 53 | #include <linux/idr.h> |
e443b333 AS |
54 | #include <linux/interrupt.h> |
55 | #include <linux/io.h> | |
e443b333 AS |
56 | #include <linux/kernel.h> |
57 | #include <linux/slab.h> | |
58 | #include <linux/pm_runtime.h> | |
59 | #include <linux/usb/ch9.h> | |
60 | #include <linux/usb/gadget.h> | |
61 | #include <linux/usb/otg.h> | |
62 | #include <linux/usb/chipidea.h> | |
40dcd0e8 | 63 | #include <linux/usb/of.h> |
4f6743d5 | 64 | #include <linux/of.h> |
1542d9c3 | 65 | #include <linux/regulator/consumer.h> |
8022d3d5 | 66 | #include <linux/usb/ehci_def.h> |
e443b333 AS |
67 | |
68 | #include "ci.h" | |
69 | #include "udc.h" | |
70 | #include "bits.h" | |
eb70e5ab | 71 | #include "host.h" |
c10b4f03 | 72 | #include "otg.h" |
4dcf720c | 73 | #include "otg_fsm.h" |
e443b333 | 74 | |
5f36e231 | 75 | /* Controller register map */ |
987e7bc3 MKB |
76 | static const u8 ci_regs_nolpm[] = { |
77 | [CAP_CAPLENGTH] = 0x00U, | |
78 | [CAP_HCCPARAMS] = 0x08U, | |
79 | [CAP_DCCPARAMS] = 0x24U, | |
80 | [CAP_TESTMODE] = 0x38U, | |
81 | [OP_USBCMD] = 0x00U, | |
82 | [OP_USBSTS] = 0x04U, | |
83 | [OP_USBINTR] = 0x08U, | |
84 | [OP_DEVICEADDR] = 0x14U, | |
85 | [OP_ENDPTLISTADDR] = 0x18U, | |
28362673 | 86 | [OP_TTCTRL] = 0x1CU, |
96625ead | 87 | [OP_BURSTSIZE] = 0x20U, |
7bb7e9b1 | 88 | [OP_ULPI_VIEWPORT] = 0x30U, |
987e7bc3 MKB |
89 | [OP_PORTSC] = 0x44U, |
90 | [OP_DEVLC] = 0x84U, | |
91 | [OP_OTGSC] = 0x64U, | |
92 | [OP_USBMODE] = 0x68U, | |
93 | [OP_ENDPTSETUPSTAT] = 0x6CU, | |
94 | [OP_ENDPTPRIME] = 0x70U, | |
95 | [OP_ENDPTFLUSH] = 0x74U, | |
96 | [OP_ENDPTSTAT] = 0x78U, | |
97 | [OP_ENDPTCOMPLETE] = 0x7CU, | |
98 | [OP_ENDPTCTRL] = 0x80U, | |
e443b333 AS |
99 | }; |
100 | ||
987e7bc3 MKB |
101 | static const u8 ci_regs_lpm[] = { |
102 | [CAP_CAPLENGTH] = 0x00U, | |
103 | [CAP_HCCPARAMS] = 0x08U, | |
104 | [CAP_DCCPARAMS] = 0x24U, | |
105 | [CAP_TESTMODE] = 0xFCU, | |
106 | [OP_USBCMD] = 0x00U, | |
107 | [OP_USBSTS] = 0x04U, | |
108 | [OP_USBINTR] = 0x08U, | |
109 | [OP_DEVICEADDR] = 0x14U, | |
110 | [OP_ENDPTLISTADDR] = 0x18U, | |
28362673 | 111 | [OP_TTCTRL] = 0x1CU, |
96625ead | 112 | [OP_BURSTSIZE] = 0x20U, |
7bb7e9b1 | 113 | [OP_ULPI_VIEWPORT] = 0x30U, |
987e7bc3 MKB |
114 | [OP_PORTSC] = 0x44U, |
115 | [OP_DEVLC] = 0x84U, | |
116 | [OP_OTGSC] = 0xC4U, | |
117 | [OP_USBMODE] = 0xC8U, | |
118 | [OP_ENDPTSETUPSTAT] = 0xD8U, | |
119 | [OP_ENDPTPRIME] = 0xDCU, | |
120 | [OP_ENDPTFLUSH] = 0xE0U, | |
121 | [OP_ENDPTSTAT] = 0xE4U, | |
122 | [OP_ENDPTCOMPLETE] = 0xE8U, | |
123 | [OP_ENDPTCTRL] = 0xECU, | |
e443b333 AS |
124 | }; |
125 | ||
158ec071 | 126 | static void hw_alloc_regmap(struct ci_hdrc *ci, bool is_lpm) |
e443b333 AS |
127 | { |
128 | int i; | |
129 | ||
e443b333 | 130 | for (i = 0; i < OP_ENDPTCTRL; i++) |
5f36e231 AS |
131 | ci->hw_bank.regmap[i] = |
132 | (i <= CAP_LAST ? ci->hw_bank.cap : ci->hw_bank.op) + | |
e443b333 AS |
133 | (is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]); |
134 | ||
135 | for (; i <= OP_LAST; i++) | |
5f36e231 | 136 | ci->hw_bank.regmap[i] = ci->hw_bank.op + |
e443b333 AS |
137 | 4 * (i - OP_ENDPTCTRL) + |
138 | (is_lpm | |
139 | ? ci_regs_lpm[OP_ENDPTCTRL] | |
140 | : ci_regs_nolpm[OP_ENDPTCTRL]); | |
141 | ||
e443b333 AS |
142 | } |
143 | ||
cb271f3c PC |
144 | static enum ci_revision ci_get_revision(struct ci_hdrc *ci) |
145 | { | |
146 | int ver = hw_read_id_reg(ci, ID_ID, VERSION) >> __ffs(VERSION); | |
147 | enum ci_revision rev = CI_REVISION_UNKNOWN; | |
148 | ||
149 | if (ver == 0x2) { | |
150 | rev = hw_read_id_reg(ci, ID_ID, REVISION) | |
151 | >> __ffs(REVISION); | |
152 | rev += CI_REVISION_20; | |
153 | } else if (ver == 0x0) { | |
154 | rev = CI_REVISION_1X; | |
155 | } | |
156 | ||
157 | return rev; | |
158 | } | |
159 | ||
36304b06 LJ |
160 | /** |
161 | * hw_read_intr_enable: returns interrupt enable register | |
162 | * | |
19353881 PC |
163 | * @ci: the controller |
164 | * | |
36304b06 LJ |
165 | * This function returns register data |
166 | */ | |
167 | u32 hw_read_intr_enable(struct ci_hdrc *ci) | |
168 | { | |
169 | return hw_read(ci, OP_USBINTR, ~0); | |
170 | } | |
171 | ||
172 | /** | |
173 | * hw_read_intr_status: returns interrupt status register | |
174 | * | |
19353881 PC |
175 | * @ci: the controller |
176 | * | |
36304b06 LJ |
177 | * This function returns register data |
178 | */ | |
179 | u32 hw_read_intr_status(struct ci_hdrc *ci) | |
180 | { | |
181 | return hw_read(ci, OP_USBSTS, ~0); | |
182 | } | |
183 | ||
e443b333 AS |
184 | /** |
185 | * hw_port_test_set: writes port test mode (execute without interruption) | |
186 | * @mode: new value | |
187 | * | |
188 | * This function returns an error code | |
189 | */ | |
8e22978c | 190 | int hw_port_test_set(struct ci_hdrc *ci, u8 mode) |
e443b333 AS |
191 | { |
192 | const u8 TEST_MODE_MAX = 7; | |
193 | ||
194 | if (mode > TEST_MODE_MAX) | |
195 | return -EINVAL; | |
196 | ||
727b4ddb | 197 | hw_write(ci, OP_PORTSC, PORTSC_PTC, mode << __ffs(PORTSC_PTC)); |
e443b333 AS |
198 | return 0; |
199 | } | |
200 | ||
201 | /** | |
202 | * hw_port_test_get: reads port test mode value | |
203 | * | |
19353881 PC |
204 | * @ci: the controller |
205 | * | |
e443b333 AS |
206 | * This function returns port test mode value |
207 | */ | |
8e22978c | 208 | u8 hw_port_test_get(struct ci_hdrc *ci) |
e443b333 | 209 | { |
727b4ddb | 210 | return hw_read(ci, OP_PORTSC, PORTSC_PTC) >> __ffs(PORTSC_PTC); |
e443b333 AS |
211 | } |
212 | ||
b82613cf PC |
213 | static void hw_wait_phy_stable(void) |
214 | { | |
215 | /* | |
216 | * The phy needs some delay to output the stable status from low | |
217 | * power mode. And for OTGSC, the status inputs are debounced | |
218 | * using a 1 ms time constant, so, delay 2ms for controller to get | |
219 | * the stable status, like vbus and id when the phy leaves low power. | |
220 | */ | |
221 | usleep_range(2000, 2500); | |
222 | } | |
223 | ||
864cf949 PC |
224 | /* The PHY enters/leaves low power mode */ |
225 | static void ci_hdrc_enter_lpm(struct ci_hdrc *ci, bool enable) | |
226 | { | |
227 | enum ci_hw_regs reg = ci->hw_bank.lpm ? OP_DEVLC : OP_PORTSC; | |
228 | bool lpm = !!(hw_read(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm))); | |
229 | ||
6d037db6 | 230 | if (enable && !lpm) |
864cf949 PC |
231 | hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm), |
232 | PORTSC_PHCD(ci->hw_bank.lpm)); | |
6d037db6 | 233 | else if (!enable && lpm) |
864cf949 PC |
234 | hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm), |
235 | 0); | |
864cf949 PC |
236 | } |
237 | ||
8e22978c | 238 | static int hw_device_init(struct ci_hdrc *ci, void __iomem *base) |
e443b333 AS |
239 | { |
240 | u32 reg; | |
241 | ||
242 | /* bank is a module variable */ | |
5f36e231 | 243 | ci->hw_bank.abs = base; |
e443b333 | 244 | |
5f36e231 | 245 | ci->hw_bank.cap = ci->hw_bank.abs; |
77c4400f | 246 | ci->hw_bank.cap += ci->platdata->capoffset; |
938d323f | 247 | ci->hw_bank.op = ci->hw_bank.cap + (ioread32(ci->hw_bank.cap) & 0xff); |
e443b333 | 248 | |
5f36e231 AS |
249 | hw_alloc_regmap(ci, false); |
250 | reg = hw_read(ci, CAP_HCCPARAMS, HCCPARAMS_LEN) >> | |
727b4ddb | 251 | __ffs(HCCPARAMS_LEN); |
5f36e231 | 252 | ci->hw_bank.lpm = reg; |
aeb2c121 CR |
253 | if (reg) |
254 | hw_alloc_regmap(ci, !!reg); | |
5f36e231 AS |
255 | ci->hw_bank.size = ci->hw_bank.op - ci->hw_bank.abs; |
256 | ci->hw_bank.size += OP_LAST; | |
257 | ci->hw_bank.size /= sizeof(u32); | |
e443b333 | 258 | |
5f36e231 | 259 | reg = hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_DEN) >> |
727b4ddb | 260 | __ffs(DCCPARAMS_DEN); |
5f36e231 | 261 | ci->hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */ |
e443b333 | 262 | |
09c94e62 | 263 | if (ci->hw_ep_max > ENDPT_MAX) |
e443b333 AS |
264 | return -ENODEV; |
265 | ||
864cf949 PC |
266 | ci_hdrc_enter_lpm(ci, false); |
267 | ||
c344b518 PC |
268 | /* Disable all interrupts bits */ |
269 | hw_write(ci, OP_USBINTR, 0xffffffff, 0); | |
270 | ||
271 | /* Clear all interrupts status bits*/ | |
272 | hw_write(ci, OP_USBSTS, 0xffffffff, 0xffffffff); | |
273 | ||
cb271f3c PC |
274 | ci->rev = ci_get_revision(ci); |
275 | ||
276 | dev_dbg(ci->dev, | |
277 | "ChipIdea HDRC found, revision: %d, lpm: %d; cap: %p op: %p\n", | |
278 | ci->rev, ci->hw_bank.lpm, ci->hw_bank.cap, ci->hw_bank.op); | |
e443b333 AS |
279 | |
280 | /* setup lock mode ? */ | |
281 | ||
282 | /* ENDPTSETUPSTAT is '0' by default */ | |
283 | ||
284 | /* HCSPARAMS.bf.ppc SHOULD BE zero for device */ | |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
7bb7e9b1 | 289 | void hw_phymode_configure(struct ci_hdrc *ci) |
40dcd0e8 | 290 | { |
3b5d3e68 | 291 | u32 portsc, lpm, sts = 0; |
40dcd0e8 MG |
292 | |
293 | switch (ci->platdata->phy_mode) { | |
294 | case USBPHY_INTERFACE_MODE_UTMI: | |
295 | portsc = PORTSC_PTS(PTS_UTMI); | |
296 | lpm = DEVLC_PTS(PTS_UTMI); | |
297 | break; | |
298 | case USBPHY_INTERFACE_MODE_UTMIW: | |
299 | portsc = PORTSC_PTS(PTS_UTMI) | PORTSC_PTW; | |
300 | lpm = DEVLC_PTS(PTS_UTMI) | DEVLC_PTW; | |
301 | break; | |
302 | case USBPHY_INTERFACE_MODE_ULPI: | |
303 | portsc = PORTSC_PTS(PTS_ULPI); | |
304 | lpm = DEVLC_PTS(PTS_ULPI); | |
305 | break; | |
306 | case USBPHY_INTERFACE_MODE_SERIAL: | |
307 | portsc = PORTSC_PTS(PTS_SERIAL); | |
308 | lpm = DEVLC_PTS(PTS_SERIAL); | |
309 | sts = 1; | |
310 | break; | |
311 | case USBPHY_INTERFACE_MODE_HSIC: | |
312 | portsc = PORTSC_PTS(PTS_HSIC); | |
313 | lpm = DEVLC_PTS(PTS_HSIC); | |
314 | break; | |
315 | default: | |
316 | return; | |
317 | } | |
318 | ||
319 | if (ci->hw_bank.lpm) { | |
320 | hw_write(ci, OP_DEVLC, DEVLC_PTS(7) | DEVLC_PTW, lpm); | |
3b5d3e68 CR |
321 | if (sts) |
322 | hw_write(ci, OP_DEVLC, DEVLC_STS, DEVLC_STS); | |
40dcd0e8 MG |
323 | } else { |
324 | hw_write(ci, OP_PORTSC, PORTSC_PTS(7) | PORTSC_PTW, portsc); | |
3b5d3e68 CR |
325 | if (sts) |
326 | hw_write(ci, OP_PORTSC, PORTSC_STS, PORTSC_STS); | |
40dcd0e8 MG |
327 | } |
328 | } | |
11893dae | 329 | EXPORT_SYMBOL_GPL(hw_phymode_configure); |
40dcd0e8 | 330 | |
1e5e2d3d AT |
331 | /** |
332 | * _ci_usb_phy_init: initialize phy taking in account both phy and usb_phy | |
333 | * interfaces | |
334 | * @ci: the controller | |
335 | * | |
336 | * This function returns an error code if the phy failed to init | |
337 | */ | |
338 | static int _ci_usb_phy_init(struct ci_hdrc *ci) | |
339 | { | |
340 | int ret; | |
341 | ||
342 | if (ci->phy) { | |
343 | ret = phy_init(ci->phy); | |
344 | if (ret) | |
345 | return ret; | |
346 | ||
347 | ret = phy_power_on(ci->phy); | |
348 | if (ret) { | |
349 | phy_exit(ci->phy); | |
350 | return ret; | |
351 | } | |
352 | } else { | |
353 | ret = usb_phy_init(ci->usb_phy); | |
354 | } | |
355 | ||
356 | return ret; | |
357 | } | |
358 | ||
359 | /** | |
360 | * _ci_usb_phy_exit: deinitialize phy taking in account both phy and usb_phy | |
361 | * interfaces | |
362 | * @ci: the controller | |
363 | */ | |
364 | static void ci_usb_phy_exit(struct ci_hdrc *ci) | |
365 | { | |
8feb3680 SB |
366 | if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL) |
367 | return; | |
368 | ||
1e5e2d3d AT |
369 | if (ci->phy) { |
370 | phy_power_off(ci->phy); | |
371 | phy_exit(ci->phy); | |
372 | } else { | |
373 | usb_phy_shutdown(ci->usb_phy); | |
374 | } | |
375 | } | |
376 | ||
d03cccff PC |
377 | /** |
378 | * ci_usb_phy_init: initialize phy according to different phy type | |
379 | * @ci: the controller | |
19353881 | 380 | * |
d03cccff PC |
381 | * This function returns an error code if usb_phy_init has failed |
382 | */ | |
383 | static int ci_usb_phy_init(struct ci_hdrc *ci) | |
384 | { | |
385 | int ret; | |
386 | ||
8feb3680 SB |
387 | if (ci->platdata->flags & CI_HDRC_OVERRIDE_PHY_CONTROL) |
388 | return 0; | |
389 | ||
d03cccff PC |
390 | switch (ci->platdata->phy_mode) { |
391 | case USBPHY_INTERFACE_MODE_UTMI: | |
392 | case USBPHY_INTERFACE_MODE_UTMIW: | |
393 | case USBPHY_INTERFACE_MODE_HSIC: | |
1e5e2d3d | 394 | ret = _ci_usb_phy_init(ci); |
b82613cf PC |
395 | if (!ret) |
396 | hw_wait_phy_stable(); | |
397 | else | |
d03cccff PC |
398 | return ret; |
399 | hw_phymode_configure(ci); | |
400 | break; | |
401 | case USBPHY_INTERFACE_MODE_ULPI: | |
402 | case USBPHY_INTERFACE_MODE_SERIAL: | |
403 | hw_phymode_configure(ci); | |
1e5e2d3d | 404 | ret = _ci_usb_phy_init(ci); |
d03cccff PC |
405 | if (ret) |
406 | return ret; | |
407 | break; | |
408 | default: | |
1e5e2d3d | 409 | ret = _ci_usb_phy_init(ci); |
b82613cf PC |
410 | if (!ret) |
411 | hw_wait_phy_stable(); | |
d03cccff PC |
412 | } |
413 | ||
414 | return ret; | |
415 | } | |
416 | ||
bf9c85e7 PC |
417 | |
418 | /** | |
419 | * ci_platform_configure: do controller configure | |
420 | * @ci: the controller | |
421 | * | |
422 | */ | |
423 | void ci_platform_configure(struct ci_hdrc *ci) | |
424 | { | |
8022d3d5 PC |
425 | bool is_device_mode, is_host_mode; |
426 | ||
427 | is_device_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_DC; | |
428 | is_host_mode = hw_read(ci, OP_USBMODE, USBMODE_CM) == USBMODE_CM_HC; | |
429 | ||
490b63e6 SB |
430 | if (is_device_mode) { |
431 | phy_set_mode(ci->phy, PHY_MODE_USB_DEVICE); | |
8022d3d5 | 432 | |
490b63e6 SB |
433 | if (ci->platdata->flags & CI_HDRC_DISABLE_DEVICE_STREAMING) |
434 | hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, | |
435 | USBMODE_CI_SDIS); | |
436 | } | |
437 | ||
438 | if (is_host_mode) { | |
439 | phy_set_mode(ci->phy, PHY_MODE_USB_HOST); | |
440 | ||
441 | if (ci->platdata->flags & CI_HDRC_DISABLE_HOST_STREAMING) | |
442 | hw_write(ci, OP_USBMODE, USBMODE_CI_SDIS, | |
443 | USBMODE_CI_SDIS); | |
444 | } | |
bf9c85e7 PC |
445 | |
446 | if (ci->platdata->flags & CI_HDRC_FORCE_FULLSPEED) { | |
447 | if (ci->hw_bank.lpm) | |
448 | hw_write(ci, OP_DEVLC, DEVLC_PFSC, DEVLC_PFSC); | |
449 | else | |
450 | hw_write(ci, OP_PORTSC, PORTSC_PFSC, PORTSC_PFSC); | |
451 | } | |
452 | ||
453 | if (ci->platdata->flags & CI_HDRC_SET_NON_ZERO_TTHA) | |
454 | hw_write(ci, OP_TTCTRL, TTCTRL_TTHA_MASK, TTCTRL_TTHA); | |
df96ed8d PC |
455 | |
456 | hw_write(ci, OP_USBCMD, 0xff0000, ci->platdata->itc_setting << 16); | |
457 | ||
65668718 PC |
458 | if (ci->platdata->flags & CI_HDRC_OVERRIDE_AHB_BURST) |
459 | hw_write_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK, | |
460 | ci->platdata->ahb_burst_config); | |
96625ead PC |
461 | |
462 | /* override burst size, take effect only when ahb_burst_config is 0 */ | |
463 | if (!hw_read_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK)) { | |
464 | if (ci->platdata->flags & CI_HDRC_OVERRIDE_TX_BURST) | |
465 | hw_write(ci, OP_BURSTSIZE, TX_BURST_MASK, | |
466 | ci->platdata->tx_burst_size << __ffs(TX_BURST_MASK)); | |
467 | ||
468 | if (ci->platdata->flags & CI_HDRC_OVERRIDE_RX_BURST) | |
469 | hw_write(ci, OP_BURSTSIZE, RX_BURST_MASK, | |
470 | ci->platdata->rx_burst_size); | |
471 | } | |
bf9c85e7 PC |
472 | } |
473 | ||
e443b333 | 474 | /** |
cdd278f2 | 475 | * hw_controller_reset: do controller reset |
e443b333 AS |
476 | * @ci: the controller |
477 | * | |
478 | * This function returns an error code | |
479 | */ | |
cdd278f2 PC |
480 | static int hw_controller_reset(struct ci_hdrc *ci) |
481 | { | |
482 | int count = 0; | |
483 | ||
484 | hw_write(ci, OP_USBCMD, USBCMD_RST, USBCMD_RST); | |
485 | while (hw_read(ci, OP_USBCMD, USBCMD_RST)) { | |
486 | udelay(10); | |
487 | if (count++ > 1000) | |
488 | return -ETIMEDOUT; | |
489 | } | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | /** | |
495 | * hw_device_reset: resets chip (execute without interruption) | |
496 | * @ci: the controller | |
497 | * | |
498 | * This function returns an error code | |
499 | */ | |
5b157300 | 500 | int hw_device_reset(struct ci_hdrc *ci) |
e443b333 | 501 | { |
cdd278f2 PC |
502 | int ret; |
503 | ||
e443b333 AS |
504 | /* should flush & stop before reset */ |
505 | hw_write(ci, OP_ENDPTFLUSH, ~0, ~0); | |
506 | hw_write(ci, OP_USBCMD, USBCMD_RS, 0); | |
507 | ||
cdd278f2 PC |
508 | ret = hw_controller_reset(ci); |
509 | if (ret) { | |
510 | dev_err(ci->dev, "error resetting controller, ret=%d\n", ret); | |
511 | return ret; | |
512 | } | |
e443b333 | 513 | |
11893dae SB |
514 | if (ci->platdata->notify_event) { |
515 | ret = ci->platdata->notify_event(ci, | |
8e22978c | 516 | CI_HDRC_CONTROLLER_RESET_EVENT); |
11893dae SB |
517 | if (ret) |
518 | return ret; | |
519 | } | |
e443b333 | 520 | |
e443b333 AS |
521 | /* USBMODE should be configured step by step */ |
522 | hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE); | |
5b157300 | 523 | hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_DC); |
e443b333 AS |
524 | /* HW >= 2.3 */ |
525 | hw_write(ci, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM); | |
526 | ||
5b157300 PC |
527 | if (hw_read(ci, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DC) { |
528 | pr_err("cannot enter in %s device mode", ci_role(ci)->name); | |
e443b333 AS |
529 | pr_err("lpm = %i", ci->hw_bank.lpm); |
530 | return -ENODEV; | |
531 | } | |
532 | ||
bf9c85e7 PC |
533 | ci_platform_configure(ci); |
534 | ||
e443b333 AS |
535 | return 0; |
536 | } | |
537 | ||
5f36e231 AS |
538 | static irqreturn_t ci_irq(int irq, void *data) |
539 | { | |
8e22978c | 540 | struct ci_hdrc *ci = data; |
5f36e231 | 541 | irqreturn_t ret = IRQ_NONE; |
b183c19f | 542 | u32 otgsc = 0; |
5f36e231 | 543 | |
1f874edc PC |
544 | if (ci->in_lpm) { |
545 | disable_irq_nosync(irq); | |
546 | ci->wakeup_int = true; | |
547 | pm_runtime_get(ci->dev); | |
548 | return IRQ_HANDLED; | |
549 | } | |
550 | ||
4dcf720c | 551 | if (ci->is_otg) { |
0c33bf78 | 552 | otgsc = hw_read_otgsc(ci, ~0); |
4dcf720c LJ |
553 | if (ci_otg_is_fsm_mode(ci)) { |
554 | ret = ci_otg_fsm_irq(ci); | |
555 | if (ret == IRQ_HANDLED) | |
556 | return ret; | |
557 | } | |
558 | } | |
5f36e231 | 559 | |
a107f8c5 PC |
560 | /* |
561 | * Handle id change interrupt, it indicates device/host function | |
562 | * switch. | |
563 | */ | |
564 | if (ci->is_otg && (otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS)) { | |
565 | ci->id_event = true; | |
0c33bf78 LJ |
566 | /* Clear ID change irq status */ |
567 | hw_write_otgsc(ci, OTGSC_IDIS, OTGSC_IDIS); | |
be6b0c1b | 568 | ci_otg_queue_work(ci); |
a107f8c5 PC |
569 | return IRQ_HANDLED; |
570 | } | |
b183c19f | 571 | |
a107f8c5 PC |
572 | /* |
573 | * Handle vbus change interrupt, it indicates device connection | |
574 | * and disconnection events. | |
575 | */ | |
576 | if (ci->is_otg && (otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS)) { | |
577 | ci->b_sess_valid_event = true; | |
0c33bf78 LJ |
578 | /* Clear BSV irq */ |
579 | hw_write_otgsc(ci, OTGSC_BSVIS, OTGSC_BSVIS); | |
be6b0c1b | 580 | ci_otg_queue_work(ci); |
a107f8c5 | 581 | return IRQ_HANDLED; |
5f36e231 AS |
582 | } |
583 | ||
a107f8c5 PC |
584 | /* Handle device/host interrupt */ |
585 | if (ci->role != CI_ROLE_END) | |
586 | ret = ci_role(ci)->irq(ci); | |
587 | ||
b183c19f | 588 | return ret; |
5f36e231 AS |
589 | } |
590 | ||
5cc49268 SB |
591 | static int ci_cable_notifier(struct notifier_block *nb, unsigned long event, |
592 | void *ptr) | |
3ecb3e09 | 593 | { |
5cc49268 SB |
594 | struct ci_hdrc_cable *cbl = container_of(nb, struct ci_hdrc_cable, nb); |
595 | struct ci_hdrc *ci = cbl->ci; | |
3ecb3e09 | 596 | |
5cc49268 SB |
597 | cbl->connected = event; |
598 | cbl->changed = true; | |
3ecb3e09 II |
599 | |
600 | ci_irq(ci->irq, ci); | |
601 | return NOTIFY_DONE; | |
602 | } | |
603 | ||
1542d9c3 PC |
604 | static int ci_get_platdata(struct device *dev, |
605 | struct ci_hdrc_platform_data *platdata) | |
606 | { | |
3ecb3e09 II |
607 | struct extcon_dev *ext_vbus, *ext_id; |
608 | struct ci_hdrc_cable *cable; | |
79742351 LJ |
609 | int ret; |
610 | ||
c22600c3 PC |
611 | if (!platdata->phy_mode) |
612 | platdata->phy_mode = of_usb_get_phy_mode(dev->of_node); | |
613 | ||
614 | if (!platdata->dr_mode) | |
06e7114f | 615 | platdata->dr_mode = usb_get_dr_mode(dev); |
c22600c3 PC |
616 | |
617 | if (platdata->dr_mode == USB_DR_MODE_UNKNOWN) | |
618 | platdata->dr_mode = USB_DR_MODE_OTG; | |
619 | ||
c2ec3a73 PC |
620 | if (platdata->dr_mode != USB_DR_MODE_PERIPHERAL) { |
621 | /* Get the vbus regulator */ | |
622 | platdata->reg_vbus = devm_regulator_get(dev, "vbus"); | |
623 | if (PTR_ERR(platdata->reg_vbus) == -EPROBE_DEFER) { | |
624 | return -EPROBE_DEFER; | |
625 | } else if (PTR_ERR(platdata->reg_vbus) == -ENODEV) { | |
6629467b | 626 | /* no vbus regulator is needed */ |
c2ec3a73 PC |
627 | platdata->reg_vbus = NULL; |
628 | } else if (IS_ERR(platdata->reg_vbus)) { | |
629 | dev_err(dev, "Getting regulator error: %ld\n", | |
630 | PTR_ERR(platdata->reg_vbus)); | |
631 | return PTR_ERR(platdata->reg_vbus); | |
632 | } | |
f6a9ff07 PC |
633 | /* Get TPL support */ |
634 | if (!platdata->tpl_support) | |
635 | platdata->tpl_support = | |
636 | of_usb_host_tpl_support(dev->of_node); | |
c2ec3a73 PC |
637 | } |
638 | ||
79742351 LJ |
639 | if (platdata->dr_mode == USB_DR_MODE_OTG) { |
640 | /* We can support HNP and SRP of OTG 2.0 */ | |
641 | platdata->ci_otg_caps.otg_rev = 0x0200; | |
642 | platdata->ci_otg_caps.hnp_support = true; | |
643 | platdata->ci_otg_caps.srp_support = true; | |
644 | ||
645 | /* Update otg capabilities by DT properties */ | |
646 | ret = of_usb_update_otg_caps(dev->of_node, | |
647 | &platdata->ci_otg_caps); | |
648 | if (ret) | |
649 | return ret; | |
650 | } | |
651 | ||
63863b98 | 652 | if (usb_get_maximum_speed(dev) == USB_SPEED_FULL) |
4f6743d5 MG |
653 | platdata->flags |= CI_HDRC_FORCE_FULLSPEED; |
654 | ||
4b19b78a | 655 | of_property_read_u32(dev->of_node, "phy-clkgate-delay-us", |
1fbf4628 FE |
656 | &platdata->phy_clkgate_delay_us); |
657 | ||
df96ed8d | 658 | platdata->itc_setting = 1; |
df96ed8d | 659 | |
4b19b78a SS |
660 | of_property_read_u32(dev->of_node, "itc-setting", |
661 | &platdata->itc_setting); | |
662 | ||
663 | ret = of_property_read_u32(dev->of_node, "ahb-burst-config", | |
664 | &platdata->ahb_burst_config); | |
665 | if (!ret) { | |
65668718 | 666 | platdata->flags |= CI_HDRC_OVERRIDE_AHB_BURST; |
4b19b78a SS |
667 | } else if (ret != -EINVAL) { |
668 | dev_err(dev, "failed to get ahb-burst-config\n"); | |
669 | return ret; | |
65668718 PC |
670 | } |
671 | ||
4b19b78a SS |
672 | ret = of_property_read_u32(dev->of_node, "tx-burst-size-dword", |
673 | &platdata->tx_burst_size); | |
674 | if (!ret) { | |
96625ead | 675 | platdata->flags |= CI_HDRC_OVERRIDE_TX_BURST; |
4b19b78a SS |
676 | } else if (ret != -EINVAL) { |
677 | dev_err(dev, "failed to get tx-burst-size-dword\n"); | |
678 | return ret; | |
96625ead PC |
679 | } |
680 | ||
4b19b78a SS |
681 | ret = of_property_read_u32(dev->of_node, "rx-burst-size-dword", |
682 | &platdata->rx_burst_size); | |
683 | if (!ret) { | |
96625ead | 684 | platdata->flags |= CI_HDRC_OVERRIDE_RX_BURST; |
4b19b78a SS |
685 | } else if (ret != -EINVAL) { |
686 | dev_err(dev, "failed to get rx-burst-size-dword\n"); | |
687 | return ret; | |
96625ead PC |
688 | } |
689 | ||
aa738187 PC |
690 | if (of_find_property(dev->of_node, "non-zero-ttctrl-ttha", NULL)) |
691 | platdata->flags |= CI_HDRC_SET_NON_ZERO_TTHA; | |
692 | ||
3ecb3e09 II |
693 | ext_id = ERR_PTR(-ENODEV); |
694 | ext_vbus = ERR_PTR(-ENODEV); | |
695 | if (of_property_read_bool(dev->of_node, "extcon")) { | |
696 | /* Each one of them is not mandatory */ | |
697 | ext_vbus = extcon_get_edev_by_phandle(dev, 0); | |
698 | if (IS_ERR(ext_vbus) && PTR_ERR(ext_vbus) != -ENODEV) | |
699 | return PTR_ERR(ext_vbus); | |
700 | ||
701 | ext_id = extcon_get_edev_by_phandle(dev, 1); | |
702 | if (IS_ERR(ext_id) && PTR_ERR(ext_id) != -ENODEV) | |
703 | return PTR_ERR(ext_id); | |
704 | } | |
705 | ||
706 | cable = &platdata->vbus_extcon; | |
5cc49268 | 707 | cable->nb.notifier_call = ci_cable_notifier; |
3ecb3e09 II |
708 | cable->edev = ext_vbus; |
709 | ||
710 | if (!IS_ERR(ext_vbus)) { | |
3f991aa0 | 711 | ret = extcon_get_state(cable->edev, EXTCON_USB); |
3ecb3e09 | 712 | if (ret) |
5cc49268 | 713 | cable->connected = true; |
3ecb3e09 | 714 | else |
5cc49268 | 715 | cable->connected = false; |
3ecb3e09 II |
716 | } |
717 | ||
718 | cable = &platdata->id_extcon; | |
5cc49268 | 719 | cable->nb.notifier_call = ci_cable_notifier; |
3ecb3e09 II |
720 | cable->edev = ext_id; |
721 | ||
722 | if (!IS_ERR(ext_id)) { | |
3f991aa0 | 723 | ret = extcon_get_state(cable->edev, EXTCON_USB_HOST); |
3ecb3e09 | 724 | if (ret) |
5cc49268 | 725 | cable->connected = true; |
3ecb3e09 | 726 | else |
5cc49268 | 727 | cable->connected = false; |
3ecb3e09 | 728 | } |
1542d9c3 PC |
729 | return 0; |
730 | } | |
731 | ||
3ecb3e09 II |
732 | static int ci_extcon_register(struct ci_hdrc *ci) |
733 | { | |
734 | struct ci_hdrc_cable *id, *vbus; | |
735 | int ret; | |
736 | ||
737 | id = &ci->platdata->id_extcon; | |
738 | id->ci = ci; | |
739 | if (!IS_ERR(id->edev)) { | |
3f991aa0 CC |
740 | ret = devm_extcon_register_notifier(ci->dev, id->edev, |
741 | EXTCON_USB_HOST, &id->nb); | |
3ecb3e09 II |
742 | if (ret < 0) { |
743 | dev_err(ci->dev, "register ID failed\n"); | |
744 | return ret; | |
745 | } | |
746 | } | |
747 | ||
748 | vbus = &ci->platdata->vbus_extcon; | |
749 | vbus->ci = ci; | |
750 | if (!IS_ERR(vbus->edev)) { | |
3f991aa0 CC |
751 | ret = devm_extcon_register_notifier(ci->dev, vbus->edev, |
752 | EXTCON_USB, &vbus->nb); | |
3ecb3e09 | 753 | if (ret < 0) { |
3ecb3e09 II |
754 | dev_err(ci->dev, "register VBUS failed\n"); |
755 | return ret; | |
756 | } | |
757 | } | |
758 | ||
1542d9c3 PC |
759 | return 0; |
760 | } | |
761 | ||
fe6e125e RZ |
762 | static DEFINE_IDA(ci_ida); |
763 | ||
8e22978c | 764 | struct platform_device *ci_hdrc_add_device(struct device *dev, |
cbc6dc2a | 765 | struct resource *res, int nres, |
8e22978c | 766 | struct ci_hdrc_platform_data *platdata) |
cbc6dc2a RZ |
767 | { |
768 | struct platform_device *pdev; | |
fe6e125e | 769 | int id, ret; |
cbc6dc2a | 770 | |
1542d9c3 PC |
771 | ret = ci_get_platdata(dev, platdata); |
772 | if (ret) | |
773 | return ERR_PTR(ret); | |
774 | ||
fe6e125e RZ |
775 | id = ida_simple_get(&ci_ida, 0, 0, GFP_KERNEL); |
776 | if (id < 0) | |
777 | return ERR_PTR(id); | |
778 | ||
779 | pdev = platform_device_alloc("ci_hdrc", id); | |
780 | if (!pdev) { | |
781 | ret = -ENOMEM; | |
782 | goto put_id; | |
783 | } | |
cbc6dc2a RZ |
784 | |
785 | pdev->dev.parent = dev; | |
cbc6dc2a RZ |
786 | |
787 | ret = platform_device_add_resources(pdev, res, nres); | |
788 | if (ret) | |
789 | goto err; | |
790 | ||
791 | ret = platform_device_add_data(pdev, platdata, sizeof(*platdata)); | |
792 | if (ret) | |
793 | goto err; | |
794 | ||
795 | ret = platform_device_add(pdev); | |
796 | if (ret) | |
797 | goto err; | |
798 | ||
799 | return pdev; | |
800 | ||
801 | err: | |
802 | platform_device_put(pdev); | |
fe6e125e RZ |
803 | put_id: |
804 | ida_simple_remove(&ci_ida, id); | |
cbc6dc2a RZ |
805 | return ERR_PTR(ret); |
806 | } | |
8e22978c | 807 | EXPORT_SYMBOL_GPL(ci_hdrc_add_device); |
cbc6dc2a | 808 | |
8e22978c | 809 | void ci_hdrc_remove_device(struct platform_device *pdev) |
cbc6dc2a | 810 | { |
98c35534 | 811 | int id = pdev->id; |
cbc6dc2a | 812 | platform_device_unregister(pdev); |
98c35534 | 813 | ida_simple_remove(&ci_ida, id); |
cbc6dc2a | 814 | } |
8e22978c | 815 | EXPORT_SYMBOL_GPL(ci_hdrc_remove_device); |
cbc6dc2a | 816 | |
3f124d23 PC |
817 | static inline void ci_role_destroy(struct ci_hdrc *ci) |
818 | { | |
819 | ci_hdrc_gadget_destroy(ci); | |
820 | ci_hdrc_host_destroy(ci); | |
c4a0bbbd | 821 | if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) |
cbec6bd5 | 822 | ci_hdrc_otg_destroy(ci); |
3f124d23 PC |
823 | } |
824 | ||
577b232f PC |
825 | static void ci_get_otg_capable(struct ci_hdrc *ci) |
826 | { | |
827 | if (ci->platdata->flags & CI_HDRC_DUAL_ROLE_NOT_OTG) | |
828 | ci->is_otg = false; | |
829 | else | |
830 | ci->is_otg = (hw_read(ci, CAP_DCCPARAMS, | |
831 | DCCPARAMS_DC | DCCPARAMS_HC) | |
832 | == (DCCPARAMS_DC | DCCPARAMS_HC)); | |
2e37cfd8 | 833 | if (ci->is_otg) { |
577b232f | 834 | dev_dbg(ci->dev, "It is OTG capable controller\n"); |
2e37cfd8 PC |
835 | /* Disable and clear all OTG irq */ |
836 | hw_write_otgsc(ci, OTGSC_INT_EN_BITS | OTGSC_INT_STATUS_BITS, | |
837 | OTGSC_INT_STATUS_BITS); | |
838 | } | |
577b232f PC |
839 | } |
840 | ||
a932a804 PC |
841 | static ssize_t ci_role_show(struct device *dev, struct device_attribute *attr, |
842 | char *buf) | |
843 | { | |
844 | struct ci_hdrc *ci = dev_get_drvdata(dev); | |
845 | ||
cbb22ebc MT |
846 | if (ci->role != CI_ROLE_END) |
847 | return sprintf(buf, "%s\n", ci_role(ci)->name); | |
848 | ||
849 | return 0; | |
a932a804 PC |
850 | } |
851 | ||
852 | static ssize_t ci_role_store(struct device *dev, | |
853 | struct device_attribute *attr, const char *buf, size_t n) | |
854 | { | |
855 | struct ci_hdrc *ci = dev_get_drvdata(dev); | |
856 | enum ci_role role; | |
857 | int ret; | |
858 | ||
859 | if (!(ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])) { | |
860 | dev_warn(dev, "Current configuration is not dual-role, quit\n"); | |
861 | return -EPERM; | |
862 | } | |
863 | ||
864 | for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++) | |
865 | if (!strncmp(buf, ci->roles[role]->name, | |
866 | strlen(ci->roles[role]->name))) | |
867 | break; | |
868 | ||
869 | if (role == CI_ROLE_END || role == ci->role) | |
870 | return -EINVAL; | |
871 | ||
872 | pm_runtime_get_sync(dev); | |
873 | disable_irq(ci->irq); | |
874 | ci_role_stop(ci); | |
875 | ret = ci_role_start(ci, role); | |
876 | if (!ret && ci->role == CI_ROLE_GADGET) | |
877 | ci_handle_vbus_change(ci); | |
878 | enable_irq(ci->irq); | |
879 | pm_runtime_put_sync(dev); | |
880 | ||
881 | return (ret == 0) ? n : ret; | |
882 | } | |
883 | static DEVICE_ATTR(role, 0644, ci_role_show, ci_role_store); | |
884 | ||
885 | static struct attribute *ci_attrs[] = { | |
886 | &dev_attr_role.attr, | |
887 | NULL, | |
888 | }; | |
889 | ||
890 | static struct attribute_group ci_attr_group = { | |
891 | .attrs = ci_attrs, | |
892 | }; | |
893 | ||
41ac7b3a | 894 | static int ci_hdrc_probe(struct platform_device *pdev) |
e443b333 AS |
895 | { |
896 | struct device *dev = &pdev->dev; | |
8e22978c | 897 | struct ci_hdrc *ci; |
e443b333 AS |
898 | struct resource *res; |
899 | void __iomem *base; | |
900 | int ret; | |
691962d1 | 901 | enum usb_dr_mode dr_mode; |
e443b333 | 902 | |
fad56745 | 903 | if (!dev_get_platdata(dev)) { |
e443b333 AS |
904 | dev_err(dev, "platform data missing\n"); |
905 | return -ENODEV; | |
906 | } | |
907 | ||
908 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
19290816 FB |
909 | base = devm_ioremap_resource(dev, res); |
910 | if (IS_ERR(base)) | |
911 | return PTR_ERR(base); | |
e443b333 | 912 | |
5f36e231 | 913 | ci = devm_kzalloc(dev, sizeof(*ci), GFP_KERNEL); |
d0f99249 | 914 | if (!ci) |
5f36e231 | 915 | return -ENOMEM; |
5f36e231 | 916 | |
a5d906bb | 917 | spin_lock_init(&ci->lock); |
5f36e231 | 918 | ci->dev = dev; |
fad56745 | 919 | ci->platdata = dev_get_platdata(dev); |
ed8f8318 PC |
920 | ci->imx28_write_fix = !!(ci->platdata->flags & |
921 | CI_HDRC_IMX28_WRITE_FIX); | |
1f874edc PC |
922 | ci->supports_runtime_pm = !!(ci->platdata->flags & |
923 | CI_HDRC_SUPPORTS_RUNTIME_PM); | |
7bb7e9b1 | 924 | platform_set_drvdata(pdev, ci); |
5f36e231 AS |
925 | |
926 | ret = hw_device_init(ci, base); | |
927 | if (ret < 0) { | |
928 | dev_err(dev, "can't initialize hardware\n"); | |
929 | return -ENODEV; | |
930 | } | |
e443b333 | 931 | |
7bb7e9b1 SB |
932 | ret = ci_ulpi_init(ci); |
933 | if (ret) | |
934 | return ret; | |
935 | ||
1e5e2d3d AT |
936 | if (ci->platdata->phy) { |
937 | ci->phy = ci->platdata->phy; | |
938 | } else if (ci->platdata->usb_phy) { | |
ef44cb42 | 939 | ci->usb_phy = ci->platdata->usb_phy; |
1e5e2d3d | 940 | } else { |
21a5b579 AT |
941 | ci->phy = devm_phy_get(dev->parent, "usb-phy"); |
942 | ci->usb_phy = devm_usb_get_phy(dev->parent, USB_PHY_TYPE_USB2); | |
c859aa65 | 943 | |
1e5e2d3d AT |
944 | /* if both generic PHY and USB PHY layers aren't enabled */ |
945 | if (PTR_ERR(ci->phy) == -ENOSYS && | |
7bb7e9b1 SB |
946 | PTR_ERR(ci->usb_phy) == -ENXIO) { |
947 | ret = -ENXIO; | |
948 | goto ulpi_exit; | |
949 | } | |
1e5e2d3d | 950 | |
7bb7e9b1 SB |
951 | if (IS_ERR(ci->phy) && IS_ERR(ci->usb_phy)) { |
952 | ret = -EPROBE_DEFER; | |
953 | goto ulpi_exit; | |
954 | } | |
c859aa65 | 955 | |
1e5e2d3d AT |
956 | if (IS_ERR(ci->phy)) |
957 | ci->phy = NULL; | |
958 | else if (IS_ERR(ci->usb_phy)) | |
959 | ci->usb_phy = NULL; | |
c859aa65 PC |
960 | } |
961 | ||
d03cccff | 962 | ret = ci_usb_phy_init(ci); |
74475ede PC |
963 | if (ret) { |
964 | dev_err(dev, "unable to init phy: %d\n", ret); | |
965 | return ret; | |
966 | } | |
967 | ||
eb70e5ab AS |
968 | ci->hw_bank.phys = res->start; |
969 | ||
5f36e231 AS |
970 | ci->irq = platform_get_irq(pdev, 0); |
971 | if (ci->irq < 0) { | |
e443b333 | 972 | dev_err(dev, "missing IRQ\n"); |
42d18212 | 973 | ret = ci->irq; |
c859aa65 | 974 | goto deinit_phy; |
5f36e231 AS |
975 | } |
976 | ||
577b232f PC |
977 | ci_get_otg_capable(ci); |
978 | ||
691962d1 | 979 | dr_mode = ci->platdata->dr_mode; |
5f36e231 | 980 | /* initialize role(s) before the interrupt is requested */ |
691962d1 SH |
981 | if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) { |
982 | ret = ci_hdrc_host_init(ci); | |
c4a0bbbd JZ |
983 | if (ret) { |
984 | if (ret == -ENXIO) | |
985 | dev_info(dev, "doesn't support host\n"); | |
986 | else | |
987 | goto deinit_phy; | |
988 | } | |
691962d1 | 989 | } |
eb70e5ab | 990 | |
691962d1 SH |
991 | if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) { |
992 | ret = ci_hdrc_gadget_init(ci); | |
c4a0bbbd JZ |
993 | if (ret) { |
994 | if (ret == -ENXIO) | |
995 | dev_info(dev, "doesn't support gadget\n"); | |
996 | else | |
997 | goto deinit_host; | |
998 | } | |
691962d1 | 999 | } |
5f36e231 AS |
1000 | |
1001 | if (!ci->roles[CI_ROLE_HOST] && !ci->roles[CI_ROLE_GADGET]) { | |
1002 | dev_err(dev, "no supported roles\n"); | |
74475ede | 1003 | ret = -ENODEV; |
c4a0bbbd | 1004 | goto deinit_gadget; |
cbec6bd5 PC |
1005 | } |
1006 | ||
27c62c2d | 1007 | if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) { |
cbec6bd5 PC |
1008 | ret = ci_hdrc_otg_init(ci); |
1009 | if (ret) { | |
1010 | dev_err(dev, "init otg fails, ret = %d\n", ret); | |
c4a0bbbd | 1011 | goto deinit_gadget; |
cbec6bd5 | 1012 | } |
5f36e231 AS |
1013 | } |
1014 | ||
1015 | if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) { | |
577b232f | 1016 | if (ci->is_otg) { |
577b232f | 1017 | ci->role = ci_otg_role(ci); |
0c33bf78 LJ |
1018 | /* Enable ID change irq */ |
1019 | hw_write_otgsc(ci, OTGSC_IDIE, OTGSC_IDIE); | |
577b232f PC |
1020 | } else { |
1021 | /* | |
1022 | * If the controller is not OTG capable, but support | |
1023 | * role switch, the defalt role is gadget, and the | |
1024 | * user can switch it through debugfs. | |
1025 | */ | |
1026 | ci->role = CI_ROLE_GADGET; | |
1027 | } | |
5f36e231 AS |
1028 | } else { |
1029 | ci->role = ci->roles[CI_ROLE_HOST] | |
1030 | ? CI_ROLE_HOST | |
1031 | : CI_ROLE_GADGET; | |
1032 | } | |
1033 | ||
4dcf720c | 1034 | if (!ci_otg_is_fsm_mode(ci)) { |
961ea496 LJ |
1035 | /* only update vbus status for peripheral */ |
1036 | if (ci->role == CI_ROLE_GADGET) | |
1037 | ci_handle_vbus_change(ci); | |
1038 | ||
4dcf720c LJ |
1039 | ret = ci_role_start(ci, ci->role); |
1040 | if (ret) { | |
1041 | dev_err(dev, "can't start %s role\n", | |
1042 | ci_role(ci)->name); | |
1043 | goto stop; | |
1044 | } | |
e443b333 AS |
1045 | } |
1046 | ||
4c503dd5 PC |
1047 | ret = devm_request_irq(dev, ci->irq, ci_irq, IRQF_SHARED, |
1048 | ci->platdata->name, ci); | |
5f36e231 AS |
1049 | if (ret) |
1050 | goto stop; | |
e443b333 | 1051 | |
3ecb3e09 II |
1052 | ret = ci_extcon_register(ci); |
1053 | if (ret) | |
1054 | goto stop; | |
1055 | ||
1f874edc PC |
1056 | if (ci->supports_runtime_pm) { |
1057 | pm_runtime_set_active(&pdev->dev); | |
1058 | pm_runtime_enable(&pdev->dev); | |
1059 | pm_runtime_set_autosuspend_delay(&pdev->dev, 2000); | |
1060 | pm_runtime_mark_last_busy(ci->dev); | |
1061 | pm_runtime_use_autosuspend(&pdev->dev); | |
1062 | } | |
1063 | ||
4dcf720c LJ |
1064 | if (ci_otg_is_fsm_mode(ci)) |
1065 | ci_hdrc_otg_fsm_start(ci); | |
1066 | ||
f8efa766 | 1067 | device_set_wakeup_capable(&pdev->dev, true); |
adf0f735 | 1068 | ret = dbg_create_files(ci); |
a932a804 PC |
1069 | if (ret) |
1070 | goto stop; | |
1071 | ||
1072 | ret = sysfs_create_group(&dev->kobj, &ci_attr_group); | |
1073 | if (ret) | |
1074 | goto remove_debug; | |
5f36e231 | 1075 | |
a932a804 PC |
1076 | return 0; |
1077 | ||
1078 | remove_debug: | |
1079 | dbg_remove_files(ci); | |
5f36e231 | 1080 | stop: |
c4a0bbbd JZ |
1081 | if (ci->is_otg && ci->roles[CI_ROLE_GADGET]) |
1082 | ci_hdrc_otg_destroy(ci); | |
1083 | deinit_gadget: | |
1084 | ci_hdrc_gadget_destroy(ci); | |
1085 | deinit_host: | |
1086 | ci_hdrc_host_destroy(ci); | |
c859aa65 | 1087 | deinit_phy: |
1e5e2d3d | 1088 | ci_usb_phy_exit(ci); |
7bb7e9b1 SB |
1089 | ulpi_exit: |
1090 | ci_ulpi_exit(ci); | |
e443b333 AS |
1091 | |
1092 | return ret; | |
1093 | } | |
1094 | ||
fb4e98ab | 1095 | static int ci_hdrc_remove(struct platform_device *pdev) |
e443b333 | 1096 | { |
8e22978c | 1097 | struct ci_hdrc *ci = platform_get_drvdata(pdev); |
e443b333 | 1098 | |
1f874edc PC |
1099 | if (ci->supports_runtime_pm) { |
1100 | pm_runtime_get_sync(&pdev->dev); | |
1101 | pm_runtime_disable(&pdev->dev); | |
1102 | pm_runtime_put_noidle(&pdev->dev); | |
1103 | } | |
1104 | ||
adf0f735 | 1105 | dbg_remove_files(ci); |
a932a804 | 1106 | sysfs_remove_group(&ci->dev->kobj, &ci_attr_group); |
3f124d23 | 1107 | ci_role_destroy(ci); |
864cf949 | 1108 | ci_hdrc_enter_lpm(ci, true); |
1e5e2d3d | 1109 | ci_usb_phy_exit(ci); |
7bb7e9b1 | 1110 | ci_ulpi_exit(ci); |
e443b333 AS |
1111 | |
1112 | return 0; | |
1113 | } | |
1114 | ||
1f874edc | 1115 | #ifdef CONFIG_PM |
961ea496 LJ |
1116 | /* Prepare wakeup by SRP before suspend */ |
1117 | static void ci_otg_fsm_suspend_for_srp(struct ci_hdrc *ci) | |
1118 | { | |
1119 | if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) && | |
1120 | !hw_read_otgsc(ci, OTGSC_ID)) { | |
1121 | hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_PP, | |
1122 | PORTSC_PP); | |
1123 | hw_write(ci, OP_PORTSC, PORTSC_W1C_BITS | PORTSC_WKCN, | |
1124 | PORTSC_WKCN); | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | /* Handle SRP when wakeup by data pulse */ | |
1129 | static void ci_otg_fsm_wakeup_by_srp(struct ci_hdrc *ci) | |
1130 | { | |
1131 | if ((ci->fsm.otg->state == OTG_STATE_A_IDLE) && | |
1132 | (ci->fsm.a_bus_drop == 1) && (ci->fsm.a_bus_req == 0)) { | |
1133 | if (!hw_read_otgsc(ci, OTGSC_ID)) { | |
1134 | ci->fsm.a_srp_det = 1; | |
1135 | ci->fsm.a_bus_drop = 0; | |
1136 | } else { | |
1137 | ci->fsm.id = 1; | |
1138 | } | |
1139 | ci_otg_queue_work(ci); | |
1140 | } | |
1141 | } | |
1142 | ||
8076932f PC |
1143 | static void ci_controller_suspend(struct ci_hdrc *ci) |
1144 | { | |
1f874edc | 1145 | disable_irq(ci->irq); |
8076932f | 1146 | ci_hdrc_enter_lpm(ci, true); |
1fbf4628 FE |
1147 | if (ci->platdata->phy_clkgate_delay_us) |
1148 | usleep_range(ci->platdata->phy_clkgate_delay_us, | |
1149 | ci->platdata->phy_clkgate_delay_us + 50); | |
1f874edc PC |
1150 | usb_phy_set_suspend(ci->usb_phy, 1); |
1151 | ci->in_lpm = true; | |
1152 | enable_irq(ci->irq); | |
8076932f PC |
1153 | } |
1154 | ||
1155 | static int ci_controller_resume(struct device *dev) | |
1156 | { | |
1157 | struct ci_hdrc *ci = dev_get_drvdata(dev); | |
7bb7e9b1 | 1158 | int ret; |
8076932f PC |
1159 | |
1160 | dev_dbg(dev, "at %s\n", __func__); | |
1161 | ||
1f874edc PC |
1162 | if (!ci->in_lpm) { |
1163 | WARN_ON(1); | |
1164 | return 0; | |
1165 | } | |
8076932f | 1166 | |
1f874edc | 1167 | ci_hdrc_enter_lpm(ci, false); |
7bb7e9b1 SB |
1168 | |
1169 | ret = ci_ulpi_resume(ci); | |
1170 | if (ret) | |
1171 | return ret; | |
1172 | ||
8076932f PC |
1173 | if (ci->usb_phy) { |
1174 | usb_phy_set_suspend(ci->usb_phy, 0); | |
1175 | usb_phy_set_wakeup(ci->usb_phy, false); | |
1176 | hw_wait_phy_stable(); | |
1177 | } | |
1178 | ||
1f874edc PC |
1179 | ci->in_lpm = false; |
1180 | if (ci->wakeup_int) { | |
1181 | ci->wakeup_int = false; | |
1182 | pm_runtime_mark_last_busy(ci->dev); | |
1183 | pm_runtime_put_autosuspend(ci->dev); | |
1184 | enable_irq(ci->irq); | |
961ea496 LJ |
1185 | if (ci_otg_is_fsm_mode(ci)) |
1186 | ci_otg_fsm_wakeup_by_srp(ci); | |
1f874edc PC |
1187 | } |
1188 | ||
8076932f PC |
1189 | return 0; |
1190 | } | |
1191 | ||
1f874edc | 1192 | #ifdef CONFIG_PM_SLEEP |
8076932f PC |
1193 | static int ci_suspend(struct device *dev) |
1194 | { | |
1195 | struct ci_hdrc *ci = dev_get_drvdata(dev); | |
1196 | ||
1197 | if (ci->wq) | |
1198 | flush_workqueue(ci->wq); | |
1f874edc PC |
1199 | /* |
1200 | * Controller needs to be active during suspend, otherwise the core | |
1201 | * may run resume when the parent is at suspend if other driver's | |
1202 | * suspend fails, it occurs before parent's suspend has not started, | |
1203 | * but the core suspend has finished. | |
1204 | */ | |
1205 | if (ci->in_lpm) | |
1206 | pm_runtime_resume(dev); | |
1207 | ||
1208 | if (ci->in_lpm) { | |
1209 | WARN_ON(1); | |
1210 | return 0; | |
1211 | } | |
8076932f | 1212 | |
f8efa766 | 1213 | if (device_may_wakeup(dev)) { |
961ea496 LJ |
1214 | if (ci_otg_is_fsm_mode(ci)) |
1215 | ci_otg_fsm_suspend_for_srp(ci); | |
1216 | ||
f8efa766 PC |
1217 | usb_phy_set_wakeup(ci->usb_phy, true); |
1218 | enable_irq_wake(ci->irq); | |
1219 | } | |
1220 | ||
8076932f PC |
1221 | ci_controller_suspend(ci); |
1222 | ||
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | static int ci_resume(struct device *dev) | |
1227 | { | |
1f874edc PC |
1228 | struct ci_hdrc *ci = dev_get_drvdata(dev); |
1229 | int ret; | |
1230 | ||
f8efa766 PC |
1231 | if (device_may_wakeup(dev)) |
1232 | disable_irq_wake(ci->irq); | |
1233 | ||
1f874edc PC |
1234 | ret = ci_controller_resume(dev); |
1235 | if (ret) | |
1236 | return ret; | |
1237 | ||
1238 | if (ci->supports_runtime_pm) { | |
1239 | pm_runtime_disable(dev); | |
1240 | pm_runtime_set_active(dev); | |
1241 | pm_runtime_enable(dev); | |
1242 | } | |
1243 | ||
1244 | return ret; | |
8076932f PC |
1245 | } |
1246 | #endif /* CONFIG_PM_SLEEP */ | |
1247 | ||
1f874edc PC |
1248 | static int ci_runtime_suspend(struct device *dev) |
1249 | { | |
1250 | struct ci_hdrc *ci = dev_get_drvdata(dev); | |
1251 | ||
1252 | dev_dbg(dev, "at %s\n", __func__); | |
1253 | ||
1254 | if (ci->in_lpm) { | |
1255 | WARN_ON(1); | |
1256 | return 0; | |
1257 | } | |
1258 | ||
961ea496 LJ |
1259 | if (ci_otg_is_fsm_mode(ci)) |
1260 | ci_otg_fsm_suspend_for_srp(ci); | |
1261 | ||
1f874edc PC |
1262 | usb_phy_set_wakeup(ci->usb_phy, true); |
1263 | ci_controller_suspend(ci); | |
1264 | ||
1265 | return 0; | |
1266 | } | |
1267 | ||
1268 | static int ci_runtime_resume(struct device *dev) | |
1269 | { | |
1270 | return ci_controller_resume(dev); | |
1271 | } | |
1272 | ||
1273 | #endif /* CONFIG_PM */ | |
8076932f PC |
1274 | static const struct dev_pm_ops ci_pm_ops = { |
1275 | SET_SYSTEM_SLEEP_PM_OPS(ci_suspend, ci_resume) | |
1f874edc | 1276 | SET_RUNTIME_PM_OPS(ci_runtime_suspend, ci_runtime_resume, NULL) |
8076932f | 1277 | }; |
1f874edc | 1278 | |
5f36e231 AS |
1279 | static struct platform_driver ci_hdrc_driver = { |
1280 | .probe = ci_hdrc_probe, | |
7690417d | 1281 | .remove = ci_hdrc_remove, |
e443b333 | 1282 | .driver = { |
5f36e231 | 1283 | .name = "ci_hdrc", |
8076932f | 1284 | .pm = &ci_pm_ops, |
e443b333 AS |
1285 | }, |
1286 | }; | |
1287 | ||
2f01a33b PC |
1288 | static int __init ci_hdrc_platform_register(void) |
1289 | { | |
1290 | ci_hdrc_host_driver_init(); | |
1291 | return platform_driver_register(&ci_hdrc_driver); | |
1292 | } | |
1293 | module_init(ci_hdrc_platform_register); | |
1294 | ||
1295 | static void __exit ci_hdrc_platform_unregister(void) | |
1296 | { | |
1297 | platform_driver_unregister(&ci_hdrc_driver); | |
1298 | } | |
1299 | module_exit(ci_hdrc_platform_unregister); | |
e443b333 | 1300 | |
5f36e231 | 1301 | MODULE_ALIAS("platform:ci_hdrc"); |
e443b333 AS |
1302 | MODULE_LICENSE("GPL v2"); |
1303 | MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>"); | |
5f36e231 | 1304 | MODULE_DESCRIPTION("ChipIdea HDRC Driver"); |