?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
usb: phy: ab8500-usb: fix last notifier arguments
[linux-2.6/btrfs-unstable.git] / drivers / usb / phy / phy-ab8500-usb.c
blob888dad65bf9b06fa424502c4bff7f086a4753bfc
1 /*
2 * drivers/usb/otg/ab8500_usb.c
3 *
4 * USB transceiver driver for AB8500 chip
5 *
6 * Copyright (C) 2010 ST-Ericsson AB
7 * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 */
24
25 #include <linux/module.h>
26 #include <linux/platform_device.h>
27 #include <linux/usb/otg.h>
28 #include <linux/slab.h>
29 #include <linux/notifier.h>
30 #include <linux/interrupt.h>
31 #include <linux/delay.h>
32 #include <linux/mfd/abx500.h>
33 #include <linux/mfd/abx500/ab8500.h>
34 #include <linux/usb/musb-ux500.h>
35 #include <linux/regulator/consumer.h>
36
37 /* Bank AB8500_SYS_CTRL2_BLOCK */
38 #define AB8500_MAIN_WD_CTRL_REG 0x01
39
40 /* Bank AB8500_USB */
41 #define AB8500_USB_LINE_STAT_REG 0x80
42 #define AB8505_USB_LINE_STAT_REG 0x94
43 #define AB8500_USB_PHY_CTRL_REG 0x8A
44
45 /* Bank AB8500_DEVELOPMENT */
46 #define AB8500_BANK12_ACCESS 0x00
47
48 /* Bank AB8500_DEBUG */
49 #define AB8500_USB_PHY_TUNE1 0x05
50 #define AB8500_USB_PHY_TUNE2 0x06
51 #define AB8500_USB_PHY_TUNE3 0x07
52
53 #define AB8500_BIT_OTG_STAT_ID (1 << 0)
54 #define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0)
55 #define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1)
56 #define AB8500_BIT_WD_CTRL_ENABLE (1 << 0)
57 #define AB8500_BIT_WD_CTRL_KICK (1 << 1)
58
59 #define AB8500_WD_KICK_DELAY_US 100 /* usec */
60 #define AB8500_WD_V11_DISABLE_DELAY_US 100 /* usec */
61 #define AB8500_V20_31952_DISABLE_DELAY_US 100 /* usec */
62
63 /* Usb line status register */
64 enum ab8500_usb_link_status {
65 USB_LINK_NOT_CONFIGURED_8500 = 0,
66 USB_LINK_STD_HOST_NC_8500,
67 USB_LINK_STD_HOST_C_NS_8500,
68 USB_LINK_STD_HOST_C_S_8500,
69 USB_LINK_HOST_CHG_NM_8500,
70 USB_LINK_HOST_CHG_HS_8500,
71 USB_LINK_HOST_CHG_HS_CHIRP_8500,
72 USB_LINK_DEDICATED_CHG_8500,
73 USB_LINK_ACA_RID_A_8500,
74 USB_LINK_ACA_RID_B_8500,
75 USB_LINK_ACA_RID_C_NM_8500,
76 USB_LINK_ACA_RID_C_HS_8500,
77 USB_LINK_ACA_RID_C_HS_CHIRP_8500,
78 USB_LINK_HM_IDGND_8500,
79 USB_LINK_RESERVED_8500,
80 USB_LINK_NOT_VALID_LINK_8500,
81 };
82
83 enum ab8505_usb_link_status {
84 USB_LINK_NOT_CONFIGURED_8505 = 0,
85 USB_LINK_STD_HOST_NC_8505,
86 USB_LINK_STD_HOST_C_NS_8505,
87 USB_LINK_STD_HOST_C_S_8505,
88 USB_LINK_CDP_8505,
89 USB_LINK_RESERVED0_8505,
90 USB_LINK_RESERVED1_8505,
91 USB_LINK_DEDICATED_CHG_8505,
92 USB_LINK_ACA_RID_A_8505,
93 USB_LINK_ACA_RID_B_8505,
94 USB_LINK_ACA_RID_C_NM_8505,
95 USB_LINK_RESERVED2_8505,
96 USB_LINK_RESERVED3_8505,
97 USB_LINK_HM_IDGND_8505,
98 USB_LINK_CHARGERPORT_NOT_OK_8505,
99 USB_LINK_CHARGER_DM_HIGH_8505,
100 USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8505,
101 USB_LINK_STD_UPSTREAM_NO_IDGNG_NO_VBUS_8505,
102 USB_LINK_STD_UPSTREAM_8505,
103 USB_LINK_CHARGER_SE1_8505,
104 USB_LINK_CARKIT_CHGR_1_8505,
105 USB_LINK_CARKIT_CHGR_2_8505,
106 USB_LINK_ACA_DOCK_CHGR_8505,
107 USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8505,
108 USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8505,
109 USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505,
110 USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505,
111 USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8505,
112 };
113
114 enum ab8500_usb_mode {
115 USB_IDLE = 0,
116 USB_PERIPHERAL,
117 USB_HOST,
118 USB_DEDICATED_CHG
119 };
120
121 struct ab8500_usb {
122 struct usb_phy phy;
123 struct device *dev;
124 struct ab8500 *ab8500;
125 unsigned vbus_draw;
126 struct delayed_work dwork;
127 struct work_struct phy_dis_work;
128 unsigned long link_status_wait;
129 enum ab8500_usb_mode mode;
130 struct regulator *v_ape;
131 struct regulator *v_musb;
132 struct regulator *v_ulpi;
133 int saved_v_ulpi;
134 int previous_link_status_state;
135 };
136
137 static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x)
138 {
139 return container_of(x, struct ab8500_usb, phy);
140 }
141
142 static void ab8500_usb_wd_workaround(struct ab8500_usb *ab)
143 {
144 abx500_set_register_interruptible(ab->dev,
145 AB8500_SYS_CTRL2_BLOCK,
146 AB8500_MAIN_WD_CTRL_REG,
147 AB8500_BIT_WD_CTRL_ENABLE);
148
149 udelay(AB8500_WD_KICK_DELAY_US);
150
151 abx500_set_register_interruptible(ab->dev,
152 AB8500_SYS_CTRL2_BLOCK,
153 AB8500_MAIN_WD_CTRL_REG,
154 (AB8500_BIT_WD_CTRL_ENABLE
155 | AB8500_BIT_WD_CTRL_KICK));
156
157 udelay(AB8500_WD_V11_DISABLE_DELAY_US);
158
159 abx500_set_register_interruptible(ab->dev,
160 AB8500_SYS_CTRL2_BLOCK,
161 AB8500_MAIN_WD_CTRL_REG,
162 0);
163 }
164
165 static void ab8500_usb_regulator_enable(struct ab8500_usb *ab)
166 {
167 int ret, volt;
168
169 regulator_enable(ab->v_ape);
170
171 if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
172 ab->saved_v_ulpi = regulator_get_voltage(ab->v_ulpi);
173 if (ab->saved_v_ulpi < 0)
174 dev_err(ab->dev, "Failed to get v_ulpi voltage\n");
175
176 ret = regulator_set_voltage(ab->v_ulpi, 1300000, 1350000);
177 if (ret < 0)
178 dev_err(ab->dev, "Failed to set the Vintcore to 1.3V, ret=%d\n",
179 ret);
180
181 ret = regulator_set_optimum_mode(ab->v_ulpi, 28000);
182 if (ret < 0)
183 dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n",
184 ret);
185 }
186
187 regulator_enable(ab->v_ulpi);
188
189 if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
190 volt = regulator_get_voltage(ab->v_ulpi);
191 if ((volt != 1300000) && (volt != 1350000))
192 dev_err(ab->dev, "Vintcore is not set to 1.3V volt=%d\n",
193 volt);
194 }
195
196 regulator_enable(ab->v_musb);
197 }
198
199 static void ab8500_usb_regulator_disable(struct ab8500_usb *ab)
200 {
201 int ret;
202
203 regulator_disable(ab->v_musb);
204
205 regulator_disable(ab->v_ulpi);
206
207 /* USB is not the only consumer of Vintcore, restore old settings */
208 if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
209 if (ab->saved_v_ulpi > 0) {
210 ret = regulator_set_voltage(ab->v_ulpi,
211 ab->saved_v_ulpi, ab->saved_v_ulpi);
212 if (ret < 0)
213 dev_err(ab->dev, "Failed to set the Vintcore to %duV, ret=%d\n",
214 ab->saved_v_ulpi, ret);
215 }
216
217 ret = regulator_set_optimum_mode(ab->v_ulpi, 0);
218 if (ret < 0)
219 dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n",
220 ret);
221 }
222
223 regulator_disable(ab->v_ape);
224 }
225
226 static void ab8500_usb_wd_linkstatus(struct ab8500_usb *ab, u8 bit)
227 {
228 /* Workaround for v2.0 bug # 31952 */
229 if (is_ab8500_2p0(ab->ab8500)) {
230 abx500_mask_and_set_register_interruptible(ab->dev,
231 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
232 bit, bit);
233 udelay(AB8500_V20_31952_DISABLE_DELAY_US);
234 }
235 }
236
237 static void ab8500_usb_phy_enable(struct ab8500_usb *ab, bool sel_host)
238 {
239 u8 bit;
240 bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN :
241 AB8500_BIT_PHY_CTRL_DEVICE_EN;
242
243 ab8500_usb_regulator_enable(ab);
244
245 abx500_mask_and_set_register_interruptible(ab->dev,
246 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
247 bit, bit);
248 }
249
250 static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host)
251 {
252 u8 bit;
253 bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN :
254 AB8500_BIT_PHY_CTRL_DEVICE_EN;
255
256 ab8500_usb_wd_linkstatus(ab, bit);
257
258 abx500_mask_and_set_register_interruptible(ab->dev,
259 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
260 bit, 0);
261
262 /* Needed to disable the phy.*/
263 ab8500_usb_wd_workaround(ab);
264
265 ab8500_usb_regulator_disable(ab);
266 }
267
268 #define ab8500_usb_host_phy_en(ab) ab8500_usb_phy_enable(ab, true)
269 #define ab8500_usb_host_phy_dis(ab) ab8500_usb_phy_disable(ab, true)
270 #define ab8500_usb_peri_phy_en(ab) ab8500_usb_phy_enable(ab, false)
271 #define ab8500_usb_peri_phy_dis(ab) ab8500_usb_phy_disable(ab, false)
272
273 static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
274 enum ab8505_usb_link_status lsts)
275 {
276 enum ux500_musb_vbus_id_status event = 0;
277
278 dev_dbg(ab->dev, "ab8505_usb_link_status_update %d\n", lsts);
279
280 /*
281 * Spurious link_status interrupts are seen at the time of
282 * disconnection of a device in RIDA state
283 */
284 if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8505 &&
285 (lsts == USB_LINK_STD_HOST_NC_8505))
286 return 0;
287
288 ab->previous_link_status_state = lsts;
289
290 switch (lsts) {
291 case USB_LINK_ACA_RID_B_8505:
292 event = UX500_MUSB_RIDB;
293 case USB_LINK_NOT_CONFIGURED_8505:
294 case USB_LINK_RESERVED0_8505:
295 case USB_LINK_RESERVED1_8505:
296 case USB_LINK_RESERVED2_8505:
297 case USB_LINK_RESERVED3_8505:
298 ab->mode = USB_IDLE;
299 ab->phy.otg->default_a = false;
300 ab->vbus_draw = 0;
301 if (event != UX500_MUSB_RIDB)
302 event = UX500_MUSB_NONE;
303 /*
304 * Fallback to default B_IDLE as nothing
305 * is connected
306 */
307 ab->phy.state = OTG_STATE_B_IDLE;
308 break;
309
310 case USB_LINK_ACA_RID_C_NM_8505:
311 event = UX500_MUSB_RIDC;
312 case USB_LINK_STD_HOST_NC_8505:
313 case USB_LINK_STD_HOST_C_NS_8505:
314 case USB_LINK_STD_HOST_C_S_8505:
315 case USB_LINK_CDP_8505:
316 if (ab->mode == USB_IDLE) {
317 ab->mode = USB_PERIPHERAL;
318 ab8500_usb_peri_phy_en(ab);
319 atomic_notifier_call_chain(&ab->phy.notifier,
320 UX500_MUSB_PREPARE, &ab->vbus_draw);
321 }
322 if (event != UX500_MUSB_RIDC)
323 event = UX500_MUSB_VBUS;
324 break;
325
326 case USB_LINK_ACA_RID_A_8505:
327 case USB_LINK_ACA_DOCK_CHGR_8505:
328 event = UX500_MUSB_RIDA;
329 case USB_LINK_HM_IDGND_8505:
330 if (ab->mode == USB_IDLE) {
331 ab->mode = USB_HOST;
332 ab8500_usb_host_phy_en(ab);
333 atomic_notifier_call_chain(&ab->phy.notifier,
334 UX500_MUSB_PREPARE, &ab->vbus_draw);
335 }
336 ab->phy.otg->default_a = true;
337 if (event != UX500_MUSB_RIDA)
338 event = UX500_MUSB_ID;
339 atomic_notifier_call_chain(&ab->phy.notifier,
340 event, &ab->vbus_draw);
341 break;
342
343 case USB_LINK_DEDICATED_CHG_8505:
344 ab->mode = USB_DEDICATED_CHG;
345 event = UX500_MUSB_CHARGER;
346 atomic_notifier_call_chain(&ab->phy.notifier,
347 event, &ab->vbus_draw);
348 break;
349
350 default:
351 break;
352 }
353
354 return 0;
355 }
356
357 static int ab8500_usb_link_status_update(struct ab8500_usb *ab,
358 enum ab8500_usb_link_status lsts)
359 {
360 enum ux500_musb_vbus_id_status event = 0;
361
362 dev_dbg(ab->dev, "ab8500_usb_link_status_update %d\n", lsts);
363
364 /*
365 * Spurious link_status interrupts are seen in case of a
366 * disconnection of a device in IDGND and RIDA stage
367 */
368 if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8500 &&
369 (lsts == USB_LINK_STD_HOST_C_NS_8500 ||
370 lsts == USB_LINK_STD_HOST_NC_8500))
371 return 0;
372
373 if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8500 &&
374 lsts == USB_LINK_STD_HOST_NC_8500)
375 return 0;
376
377 ab->previous_link_status_state = lsts;
378
379 switch (lsts) {
380 case USB_LINK_ACA_RID_B_8500:
381 event = UX500_MUSB_RIDB;
382 case USB_LINK_NOT_CONFIGURED_8500:
383 case USB_LINK_NOT_VALID_LINK_8500:
384 ab->mode = USB_IDLE;
385 ab->phy.otg->default_a = false;
386 ab->vbus_draw = 0;
387 if (event != UX500_MUSB_RIDB)
388 event = UX500_MUSB_NONE;
389 /* Fallback to default B_IDLE as nothing is connected */
390 ab->phy.state = OTG_STATE_B_IDLE;
391 break;
392
393 case USB_LINK_ACA_RID_C_NM_8500:
394 case USB_LINK_ACA_RID_C_HS_8500:
395 case USB_LINK_ACA_RID_C_HS_CHIRP_8500:
396 event = UX500_MUSB_RIDC;
397 case USB_LINK_STD_HOST_NC_8500:
398 case USB_LINK_STD_HOST_C_NS_8500:
399 case USB_LINK_STD_HOST_C_S_8500:
400 case USB_LINK_HOST_CHG_NM_8500:
401 case USB_LINK_HOST_CHG_HS_8500:
402 case USB_LINK_HOST_CHG_HS_CHIRP_8500:
403 if (ab->mode == USB_IDLE) {
404 ab->mode = USB_PERIPHERAL;
405 ab8500_usb_peri_phy_en(ab);
406 atomic_notifier_call_chain(&ab->phy.notifier,
407 UX500_MUSB_PREPARE, &ab->vbus_draw);
408 }
409 if (event != UX500_MUSB_RIDC)
410 event = UX500_MUSB_VBUS;
411 break;
412
413 case USB_LINK_ACA_RID_A_8500:
414 event = UX500_MUSB_RIDA;
415 case USB_LINK_HM_IDGND_8500:
416 if (ab->mode == USB_IDLE) {
417 ab->mode = USB_HOST;
418 ab8500_usb_host_phy_en(ab);
419 atomic_notifier_call_chain(&ab->phy.notifier,
420 UX500_MUSB_PREPARE, &ab->vbus_draw);
421 }
422 ab->phy.otg->default_a = true;
423 if (event != UX500_MUSB_RIDA)
424 event = UX500_MUSB_ID;
425 atomic_notifier_call_chain(&ab->phy.notifier,
426 event, &ab->vbus_draw);
427 break;
428
429 case USB_LINK_DEDICATED_CHG_8500:
430 ab->mode = USB_DEDICATED_CHG;
431 event = UX500_MUSB_CHARGER;
432 atomic_notifier_call_chain(&ab->phy.notifier,
433 event, &ab->vbus_draw);
434 break;
435
436 case USB_LINK_RESERVED_8500:
437 break;
438 }
439
440 return 0;
441 }
442
443 /*
444 * Connection Sequence:
445 * 1. Link Status Interrupt
446 * 2. Enable AB clock
447 * 3. Enable AB regulators
448 * 4. Enable USB phy
449 * 5. Reset the musb controller
450 * 6. Switch the ULPI GPIO pins to fucntion mode
451 * 7. Enable the musb Peripheral5 clock
452 * 8. Restore MUSB context
453 */
454 static int abx500_usb_link_status_update(struct ab8500_usb *ab)
455 {
456 u8 reg;
457 int ret = 0;
458
459 if (is_ab8500(ab->ab8500)) {
460 enum ab8500_usb_link_status lsts;
461
462 abx500_get_register_interruptible(ab->dev,
463 AB8500_USB, AB8500_USB_LINE_STAT_REG, &reg);
464 lsts = (reg >> 3) & 0x0F;
465 ret = ab8500_usb_link_status_update(ab, lsts);
466 } else if (is_ab8505(ab->ab8500)) {
467 enum ab8505_usb_link_status lsts;
468
469 abx500_get_register_interruptible(ab->dev,
470 AB8500_USB, AB8505_USB_LINE_STAT_REG, &reg);
471 lsts = (reg >> 3) & 0x1F;
472 ret = ab8505_usb_link_status_update(ab, lsts);
473 }
474
475 return ret;
476 }
477
478 /*
479 * Disconnection Sequence:
480 * 1. Disconect Interrupt
481 * 2. Disable regulators
482 * 3. Disable AB clock
483 * 4. Disable the Phy
484 * 5. Link Status Interrupt
485 * 6. Disable Musb Clock
486 */
487 static irqreturn_t ab8500_usb_disconnect_irq(int irq, void *data)
488 {
489 struct ab8500_usb *ab = (struct ab8500_usb *) data;
490 enum usb_phy_events event = UX500_MUSB_NONE;
491
492 /* Link status will not be updated till phy is disabled. */
493 if (ab->mode == USB_HOST) {
494 ab->phy.otg->default_a = false;
495 ab->vbus_draw = 0;
496 atomic_notifier_call_chain(&ab->phy.notifier,
497 event, &ab->vbus_draw);
498 ab8500_usb_host_phy_dis(ab);
499 ab->mode = USB_IDLE;
500 }
501
502 if (ab->mode == USB_PERIPHERAL) {
503 atomic_notifier_call_chain(&ab->phy.notifier,
504 event, &ab->vbus_draw);
505 ab8500_usb_peri_phy_dis(ab);
506 atomic_notifier_call_chain(&ab->phy.notifier,
507 UX500_MUSB_CLEAN, &ab->vbus_draw);
508 ab->mode = USB_IDLE;
509 ab->phy.otg->default_a = false;
510 ab->vbus_draw = 0;
511 }
512
513 if (is_ab8500_2p0(ab->ab8500)) {
514 if (ab->mode == USB_DEDICATED_CHG) {
515 ab8500_usb_wd_linkstatus(ab,
516 AB8500_BIT_PHY_CTRL_DEVICE_EN);
517 abx500_mask_and_set_register_interruptible(ab->dev,
518 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
519 AB8500_BIT_PHY_CTRL_DEVICE_EN, 0);
520 }
521 }
522
523 return IRQ_HANDLED;
524 }
525
526 static irqreturn_t ab8500_usb_link_status_irq(int irq, void *data)
527 {
528 struct ab8500_usb *ab = (struct ab8500_usb *) data;
529
530 abx500_usb_link_status_update(ab);
531
532 return IRQ_HANDLED;
533 }
534
535 static void ab8500_usb_delayed_work(struct work_struct *work)
536 {
537 struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
538 dwork.work);
539
540 abx500_usb_link_status_update(ab);
541 }
542
543 static void ab8500_usb_phy_disable_work(struct work_struct *work)
544 {
545 struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
546 phy_dis_work);
547
548 if (!ab->phy.otg->host)
549 ab8500_usb_host_phy_dis(ab);
550
551 if (!ab->phy.otg->gadget)
552 ab8500_usb_peri_phy_dis(ab);
553 }
554
555 static unsigned ab8500_eyediagram_workaroud(struct ab8500_usb *ab, unsigned mA)
556 {
557 /*
558 * AB8500 V2 has eye diagram issues when drawing more than 100mA from
559 * VBUS. Set charging current to 100mA in case of standard host
560 */
561 if (is_ab8500_2p0_or_earlier(ab->ab8500))
562 if (mA > 100)
563 mA = 100;
564
565 return mA;
566 }
567
568 static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA)
569 {
570 struct ab8500_usb *ab;
571
572 if (!phy)
573 return -ENODEV;
574
575 ab = phy_to_ab(phy);
576
577 mA = ab8500_eyediagram_workaroud(ab, mA);
578
579 ab->vbus_draw = mA;
580
581 atomic_notifier_call_chain(&ab->phy.notifier,
582 UX500_MUSB_VBUS, &ab->vbus_draw);
583
584 return 0;
585 }
586
587 static int ab8500_usb_set_suspend(struct usb_phy *x, int suspend)
588 {
589 /* TODO */
590 return 0;
591 }
592
593 static int ab8500_usb_set_peripheral(struct usb_otg *otg,
594 struct usb_gadget *gadget)
595 {
596 struct ab8500_usb *ab;
597
598 if (!otg)
599 return -ENODEV;
600
601 ab = phy_to_ab(otg->phy);
602
603 /* Some drivers call this function in atomic context.
604 * Do not update ab8500 registers directly till this
605 * is fixed.
606 */
607
608 if (!gadget) {
609 otg->gadget = NULL;
610 schedule_work(&ab->phy_dis_work);
611 } else {
612 otg->gadget = gadget;
613 otg->phy->state = OTG_STATE_B_IDLE;
614
615 /* Phy will not be enabled if cable is already
616 * plugged-in. Schedule to enable phy.
617 * Use same delay to avoid any race condition.
618 */
619 schedule_delayed_work(&ab->dwork, ab->link_status_wait);
620 }
621
622 return 0;
623 }
624
625 static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
626 {
627 struct ab8500_usb *ab;
628
629 if (!otg)
630 return -ENODEV;
631
632 ab = phy_to_ab(otg->phy);
633
634 /* Some drivers call this function in atomic context.
635 * Do not update ab8500 registers directly till this
636 * is fixed.
637 */
638
639 if (!host) {
640 otg->host = NULL;
641 schedule_work(&ab->phy_dis_work);
642 } else {
643 otg->host = host;
644 /* Phy will not be enabled if cable is already
645 * plugged-in. Schedule to enable phy.
646 * Use same delay to avoid any race condition.
647 */
648 schedule_delayed_work(&ab->dwork, ab->link_status_wait);
649 }
650
651 return 0;
652 }
653
654 static int ab8500_usb_regulator_get(struct ab8500_usb *ab)
655 {
656 int err;
657
658 ab->v_ape = devm_regulator_get(ab->dev, "v-ape");
659 if (IS_ERR(ab->v_ape)) {
660 dev_err(ab->dev, "Could not get v-ape supply\n");
661 err = PTR_ERR(ab->v_ape);
662 return err;
663 }
664
665 ab->v_ulpi = devm_regulator_get(ab->dev, "vddulpivio18");
666 if (IS_ERR(ab->v_ulpi)) {
667 dev_err(ab->dev, "Could not get vddulpivio18 supply\n");
668 err = PTR_ERR(ab->v_ulpi);
669 return err;
670 }
671
672 ab->v_musb = devm_regulator_get(ab->dev, "musb_1v8");
673 if (IS_ERR(ab->v_musb)) {
674 dev_err(ab->dev, "Could not get musb_1v8 supply\n");
675 err = PTR_ERR(ab->v_musb);
676 return err;
677 }
678
679 return 0;
680 }
681
682 static int ab8500_usb_irq_setup(struct platform_device *pdev,
683 struct ab8500_usb *ab)
684 {
685 int err;
686 int irq;
687
688 irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS");
689 if (irq < 0) {
690 dev_err(&pdev->dev, "Link status irq not found\n");
691 return irq;
692 }
693 err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
694 ab8500_usb_link_status_irq,
695 IRQF_NO_SUSPEND | IRQF_SHARED, "usb-link-status", ab);
696 if (err < 0) {
697 dev_err(ab->dev, "request_irq failed for link status irq\n");
698 return err;
699 }
700
701 irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F");
702 if (irq < 0) {
703 dev_err(&pdev->dev, "ID fall irq not found\n");
704 return irq;
705 }
706 err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
707 ab8500_usb_disconnect_irq,
708 IRQF_NO_SUSPEND | IRQF_SHARED, "usb-id-fall", ab);
709 if (err < 0) {
710 dev_err(ab->dev, "request_irq failed for ID fall irq\n");
711 return err;
712 }
713
714 irq = platform_get_irq_byname(pdev, "VBUS_DET_F");
715 if (irq < 0) {
716 dev_err(&pdev->dev, "VBUS fall irq not found\n");
717 return irq;
718 }
719 err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
720 ab8500_usb_disconnect_irq,
721 IRQF_NO_SUSPEND | IRQF_SHARED, "usb-vbus-fall", ab);
722 if (err < 0) {
723 dev_err(ab->dev, "request_irq failed for Vbus fall irq\n");
724 return err;
725 }
726
727 return 0;
728 }
729
730 static int ab8500_usb_probe(struct platform_device *pdev)
731 {
732 struct ab8500_usb *ab;
733 struct ab8500 *ab8500;
734 struct usb_otg *otg;
735 int err;
736 int rev;
737
738 ab8500 = dev_get_drvdata(pdev->dev.parent);
739 rev = abx500_get_chip_id(&pdev->dev);
740
741 if (is_ab8500_1p1_or_earlier(ab8500)) {
742 dev_err(&pdev->dev, "Unsupported AB8500 chip rev=%d\n", rev);
743 return -ENODEV;
744 }
745
746 ab = devm_kzalloc(&pdev->dev, sizeof(*ab), GFP_KERNEL);
747 if (!ab)
748 return -ENOMEM;
749
750 otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
751 if (!otg)
752 return -ENOMEM;
753
754 ab->dev = &pdev->dev;
755 ab->ab8500 = ab8500;
756 ab->phy.dev = ab->dev;
757 ab->phy.otg = otg;
758 ab->phy.label = "ab8500";
759 ab->phy.set_suspend = ab8500_usb_set_suspend;
760 ab->phy.set_power = ab8500_usb_set_power;
761 ab->phy.state = OTG_STATE_UNDEFINED;
762
763 otg->phy = &ab->phy;
764 otg->set_host = ab8500_usb_set_host;
765 otg->set_peripheral = ab8500_usb_set_peripheral;
766
767 platform_set_drvdata(pdev, ab);
768
769 ATOMIC_INIT_NOTIFIER_HEAD(&ab->phy.notifier);
770
771 /* v1: Wait for link status to become stable.
772 * all: Updates form set_host and set_peripheral as they are atomic.
773 */
774 INIT_DELAYED_WORK(&ab->dwork, ab8500_usb_delayed_work);
775
776 /* all: Disable phy when called from set_host and set_peripheral */
777 INIT_WORK(&ab->phy_dis_work, ab8500_usb_phy_disable_work);
778
779 err = ab8500_usb_regulator_get(ab);
780 if (err)
781 return err;
782
783 err = ab8500_usb_irq_setup(pdev, ab);
784 if (err < 0)
785 return err;
786
787 err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2);
788 if (err) {
789 dev_err(&pdev->dev, "Can't register transceiver\n");
790 return err;
791 }
792
793 /* Phy tuning values for AB8500 */
794 if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
795 /* Enable the PBT/Bank 0x12 access */
796 err = abx500_set_register_interruptible(ab->dev,
797 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01);
798 if (err < 0)
799 dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
800 err);
801
802 err = abx500_set_register_interruptible(ab->dev,
803 AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8);
804 if (err < 0)
805 dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
806 err);
807
808 err = abx500_set_register_interruptible(ab->dev,
809 AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x00);
810 if (err < 0)
811 dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
812 err);
813
814 err = abx500_set_register_interruptible(ab->dev,
815 AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x78);
816 if (err < 0)
817 dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
818 err);
819
820 /* Switch to normal mode/disable Bank 0x12 access */
821 err = abx500_set_register_interruptible(ab->dev,
822 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00);
823 if (err < 0)
824 dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
825 err);
826 }
827
828 /* Phy tuning values for AB8505 */
829 if (is_ab8505(ab->ab8500)) {
830 /* Enable the PBT/Bank 0x12 access */
831 err = abx500_mask_and_set_register_interruptible(ab->dev,
832 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS,
833 0x01, 0x01);
834 if (err < 0)
835 dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
836 err);
837
838 err = abx500_mask_and_set_register_interruptible(ab->dev,
839 AB8500_DEBUG, AB8500_USB_PHY_TUNE1,
840 0xC8, 0xC8);
841 if (err < 0)
842 dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
843 err);
844
845 err = abx500_mask_and_set_register_interruptible(ab->dev,
846 AB8500_DEBUG, AB8500_USB_PHY_TUNE2,
847 0x60, 0x60);
848 if (err < 0)
849 dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
850 err);
851
852 err = abx500_mask_and_set_register_interruptible(ab->dev,
853 AB8500_DEBUG, AB8500_USB_PHY_TUNE3,
854 0xFC, 0x80);
855
856 if (err < 0)
857 dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
858 err);
859
860 /* Switch to normal mode/disable Bank 0x12 access */
861 err = abx500_mask_and_set_register_interruptible(ab->dev,
862 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS,
863 0x00, 0x00);
864 if (err < 0)
865 dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
866 err);
867 }
868
869 /* Needed to enable ID detection. */
870 ab8500_usb_wd_workaround(ab);
871
872 dev_info(&pdev->dev, "revision 0x%2x driver initialized\n", rev);
873
874 return 0;
875 }
876
877 static int ab8500_usb_remove(struct platform_device *pdev)
878 {
879 struct ab8500_usb *ab = platform_get_drvdata(pdev);
880
881 cancel_delayed_work_sync(&ab->dwork);
882
883 cancel_work_sync(&ab->phy_dis_work);
884
885 usb_remove_phy(&ab->phy);
886
887 if (ab->mode == USB_HOST)
888 ab8500_usb_host_phy_dis(ab);
889 else if (ab->mode == USB_PERIPHERAL)
890 ab8500_usb_peri_phy_dis(ab);
891
892 platform_set_drvdata(pdev, NULL);
893
894 return 0;
895 }
896
897 static struct platform_driver ab8500_usb_driver = {
898 .probe = ab8500_usb_probe,
899 .remove = ab8500_usb_remove,
900 .driver = {
901 .name = "ab8500-usb",
902 .owner = THIS_MODULE,
903 },
904 };
905
906 static int __init ab8500_usb_init(void)
907 {
908 return platform_driver_register(&ab8500_usb_driver);
909 }
910 subsys_initcall(ab8500_usb_init);
911
912 static void __exit ab8500_usb_exit(void)
913 {
914 platform_driver_unregister(&ab8500_usb_driver);
915 }
916 module_exit(ab8500_usb_exit);
917
918 MODULE_ALIAS("platform:ab8500_usb");
919 MODULE_AUTHOR("ST-Ericsson AB");
920 MODULE_DESCRIPTION("AB8500 usb transceiver driver");
921 MODULE_LICENSE("GPL");
(deprecated) Btrfs devel tree