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1/*
2 * USB transceiver driver for AB8500 family chips
3 *
4 * Copyright (C) 2010-2013 ST-Ericsson AB
5 * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
6 * Avinash Kumar <avinash.kumar@stericsson.com>
7 * Thirupathi Chippakurthy <thirupathi.chippakurthy@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/clk.h>
33#include <linux/err.h>
34#include <linux/mfd/abx500.h>
35#include <linux/mfd/abx500/ab8500.h>
36#include <linux/usb/musb-ux500.h>
37#include <linux/regulator/consumer.h>
38#include <linux/pinctrl/consumer.h>
39
40/* Bank AB8500_SYS_CTRL2_BLOCK */
41#define AB8500_MAIN_WD_CTRL_REG 0x01
42
43/* Bank AB8500_USB */
44#define AB8500_USB_LINE_STAT_REG 0x80
45#define AB8505_USB_LINE_STAT_REG 0x94
46#define AB8540_USB_LINK_STAT_REG 0x94
47#define AB9540_USB_LINK_STAT_REG 0x94
48#define AB8540_USB_OTG_CTL_REG 0x87
49#define AB8500_USB_PHY_CTRL_REG 0x8A
50#define AB8540_VBUS_CTRL_REG 0x82
51
52/* Bank AB8500_DEVELOPMENT */
53#define AB8500_BANK12_ACCESS 0x00
54
55/* Bank AB8500_DEBUG */
56#define AB8540_DEBUG 0x32
57#define AB8500_USB_PHY_TUNE1 0x05
58#define AB8500_USB_PHY_TUNE2 0x06
59#define AB8500_USB_PHY_TUNE3 0x07
60
61/* Bank AB8500_INTERRUPT */
62#define AB8500_IT_SOURCE2_REG 0x01
63
64#define AB8500_BIT_OTG_STAT_ID (1 << 0)
65#define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0)
66#define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1)
67#define AB8500_BIT_WD_CTRL_ENABLE (1 << 0)
68#define AB8500_BIT_WD_CTRL_KICK (1 << 1)
69#define AB8500_BIT_SOURCE2_VBUSDET (1 << 7)
70#define AB8540_BIT_OTG_CTL_VBUS_VALID_ENA (1 << 0)
71#define AB8540_BIT_OTG_CTL_ID_HOST_ENA (1 << 1)
72#define AB8540_BIT_OTG_CTL_ID_DEV_ENA (1 << 5)
73#define AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA (1 << 0)
74
75#define AB8500_WD_KICK_DELAY_US 100 /* usec */
76#define AB8500_WD_V11_DISABLE_DELAY_US 100 /* usec */
77#define AB8500_V20_31952_DISABLE_DELAY_US 100 /* usec */
78
79/* Usb line status register */
80enum ab8500_usb_link_status {
81 USB_LINK_NOT_CONFIGURED_8500 = 0,
82 USB_LINK_STD_HOST_NC_8500,
83 USB_LINK_STD_HOST_C_NS_8500,
84 USB_LINK_STD_HOST_C_S_8500,
85 USB_LINK_HOST_CHG_NM_8500,
86 USB_LINK_HOST_CHG_HS_8500,
87 USB_LINK_HOST_CHG_HS_CHIRP_8500,
88 USB_LINK_DEDICATED_CHG_8500,
89 USB_LINK_ACA_RID_A_8500,
90 USB_LINK_ACA_RID_B_8500,
91 USB_LINK_ACA_RID_C_NM_8500,
92 USB_LINK_ACA_RID_C_HS_8500,
93 USB_LINK_ACA_RID_C_HS_CHIRP_8500,
94 USB_LINK_HM_IDGND_8500,
95 USB_LINK_RESERVED_8500,
96 USB_LINK_NOT_VALID_LINK_8500,
97};
98
99enum ab8505_usb_link_status {
100 USB_LINK_NOT_CONFIGURED_8505 = 0,
101 USB_LINK_STD_HOST_NC_8505,
102 USB_LINK_STD_HOST_C_NS_8505,
103 USB_LINK_STD_HOST_C_S_8505,
104 USB_LINK_CDP_8505,
105 USB_LINK_RESERVED0_8505,
106 USB_LINK_RESERVED1_8505,
107 USB_LINK_DEDICATED_CHG_8505,
108 USB_LINK_ACA_RID_A_8505,
109 USB_LINK_ACA_RID_B_8505,
110 USB_LINK_ACA_RID_C_NM_8505,
111 USB_LINK_RESERVED2_8505,
112 USB_LINK_RESERVED3_8505,
113 USB_LINK_HM_IDGND_8505,
114 USB_LINK_CHARGERPORT_NOT_OK_8505,
115 USB_LINK_CHARGER_DM_HIGH_8505,
116 USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8505,
117 USB_LINK_STD_UPSTREAM_NO_IDGNG_NO_VBUS_8505,
118 USB_LINK_STD_UPSTREAM_8505,
119 USB_LINK_CHARGER_SE1_8505,
120 USB_LINK_CARKIT_CHGR_1_8505,
121 USB_LINK_CARKIT_CHGR_2_8505,
122 USB_LINK_ACA_DOCK_CHGR_8505,
123 USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8505,
124 USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8505,
125 USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505,
126 USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505,
127 USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8505,
128};
129
130enum ab8540_usb_link_status {
131 USB_LINK_NOT_CONFIGURED_8540 = 0,
132 USB_LINK_STD_HOST_NC_8540,
133 USB_LINK_STD_HOST_C_NS_8540,
134 USB_LINK_STD_HOST_C_S_8540,
135 USB_LINK_CDP_8540,
136 USB_LINK_RESERVED0_8540,
137 USB_LINK_RESERVED1_8540,
138 USB_LINK_DEDICATED_CHG_8540,
139 USB_LINK_ACA_RID_A_8540,
140 USB_LINK_ACA_RID_B_8540,
141 USB_LINK_ACA_RID_C_NM_8540,
142 USB_LINK_RESERVED2_8540,
143 USB_LINK_RESERVED3_8540,
144 USB_LINK_HM_IDGND_8540,
145 USB_LINK_CHARGERPORT_NOT_OK_8540,
146 USB_LINK_CHARGER_DM_HIGH_8540,
147 USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8540,
148 USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_8540,
149 USB_LINK_STD_UPSTREAM_8540,
150 USB_LINK_CHARGER_SE1_8540,
151 USB_LINK_CARKIT_CHGR_1_8540,
152 USB_LINK_CARKIT_CHGR_2_8540,
153 USB_LINK_ACA_DOCK_CHGR_8540,
154 USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8540,
155 USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8540,
156 USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8540,
157 USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8540,
158 USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8540
159};
160
161enum ab9540_usb_link_status {
162 USB_LINK_NOT_CONFIGURED_9540 = 0,
163 USB_LINK_STD_HOST_NC_9540,
164 USB_LINK_STD_HOST_C_NS_9540,
165 USB_LINK_STD_HOST_C_S_9540,
166 USB_LINK_CDP_9540,
167 USB_LINK_RESERVED0_9540,
168 USB_LINK_RESERVED1_9540,
169 USB_LINK_DEDICATED_CHG_9540,
170 USB_LINK_ACA_RID_A_9540,
171 USB_LINK_ACA_RID_B_9540,
172 USB_LINK_ACA_RID_C_NM_9540,
173 USB_LINK_RESERVED2_9540,
174 USB_LINK_RESERVED3_9540,
175 USB_LINK_HM_IDGND_9540,
176 USB_LINK_CHARGERPORT_NOT_OK_9540,
177 USB_LINK_CHARGER_DM_HIGH_9540,
178 USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540,
179 USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_9540,
180 USB_LINK_STD_UPSTREAM_9540,
181 USB_LINK_CHARGER_SE1_9540,
182 USB_LINK_CARKIT_CHGR_1_9540,
183 USB_LINK_CARKIT_CHGR_2_9540,
184 USB_LINK_ACA_DOCK_CHGR_9540,
185 USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_9540,
186 USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_9540,
187 USB_LINK_SAMSUNG_UART_CBL_PHY_EN_9540,
188 USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_9540,
189 USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_9540
190};
191
192enum ab8500_usb_mode {
193 USB_IDLE = 0,
194 USB_PERIPHERAL,
195 USB_HOST,
196 USB_DEDICATED_CHG
197};
198
199/* Register USB_LINK_STATUS interrupt */
200#define AB8500_USB_FLAG_USE_LINK_STATUS_IRQ (1 << 0)
201/* Register ID_WAKEUP_F interrupt */
202#define AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ (1 << 1)
203/* Register VBUS_DET_F interrupt */
204#define AB8500_USB_FLAG_USE_VBUS_DET_IRQ (1 << 2)
205/* Driver is using the ab-iddet driver*/
206#define AB8500_USB_FLAG_USE_AB_IDDET (1 << 3)
207/* Enable setting regulators voltage */
208#define AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE (1 << 4)
209/* Enable the check_vbus_status workaround */
210#define AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS (1 << 5)
211/* Enable the vbus host workaround */
212#define AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK (1 << 6)
213
214struct ab8500_usb {
215 struct usb_phy phy;
216 struct device *dev;
217 struct ab8500 *ab8500;
218 unsigned vbus_draw;
219 struct work_struct phy_dis_work;
220 struct work_struct vbus_event_work;
221 enum ab8500_usb_mode mode;
222 struct clk *sysclk;
223 struct regulator *v_ape;
224 struct regulator *v_musb;
225 struct regulator *v_ulpi;
226 int saved_v_ulpi;
227 int previous_link_status_state;
228 struct pinctrl *pinctrl;
229 struct pinctrl_state *pins_sleep;
230 bool enabled_charging_detection;
231 unsigned int flags;
232};
233
234static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x)
235{
236 return container_of(x, struct ab8500_usb, phy);
237}
238
239static void ab8500_usb_wd_workaround(struct ab8500_usb *ab)
240{
241 abx500_set_register_interruptible(ab->dev,
242 AB8500_SYS_CTRL2_BLOCK,
243 AB8500_MAIN_WD_CTRL_REG,
244 AB8500_BIT_WD_CTRL_ENABLE);
245
246 udelay(AB8500_WD_KICK_DELAY_US);
247
248 abx500_set_register_interruptible(ab->dev,
249 AB8500_SYS_CTRL2_BLOCK,
250 AB8500_MAIN_WD_CTRL_REG,
251 (AB8500_BIT_WD_CTRL_ENABLE
252 | AB8500_BIT_WD_CTRL_KICK));
253
254 udelay(AB8500_WD_V11_DISABLE_DELAY_US);
255
256 abx500_set_register_interruptible(ab->dev,
257 AB8500_SYS_CTRL2_BLOCK,
258 AB8500_MAIN_WD_CTRL_REG,
259 0);
260}
261
262static void ab8500_usb_regulator_enable(struct ab8500_usb *ab)
263{
264 int ret, volt;
265
266 ret = regulator_enable(ab->v_ape);
267 if (ret)
268 dev_err(ab->dev, "Failed to enable v-ape\n");
269
270 if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) {
271 ab->saved_v_ulpi = regulator_get_voltage(ab->v_ulpi);
272 if (ab->saved_v_ulpi < 0)
273 dev_err(ab->dev, "Failed to get v_ulpi voltage\n");
274
275 ret = regulator_set_voltage(ab->v_ulpi, 1300000, 1350000);
276 if (ret < 0)
277 dev_err(ab->dev, "Failed to set the Vintcore to 1.3V, ret=%d\n",
278 ret);
279
280 ret = regulator_set_load(ab->v_ulpi, 28000);
281 if (ret < 0)
282 dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n",
283 ret);
284 }
285
286 ret = regulator_enable(ab->v_ulpi);
287 if (ret)
288 dev_err(ab->dev, "Failed to enable vddulpivio18\n");
289
290 if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) {
291 volt = regulator_get_voltage(ab->v_ulpi);
292 if ((volt != 1300000) && (volt != 1350000))
293 dev_err(ab->dev, "Vintcore is not set to 1.3V volt=%d\n",
294 volt);
295 }
296
297 ret = regulator_enable(ab->v_musb);
298 if (ret)
299 dev_err(ab->dev, "Failed to enable musb_1v8\n");
300}
301
302static void ab8500_usb_regulator_disable(struct ab8500_usb *ab)
303{
304 int ret;
305
306 regulator_disable(ab->v_musb);
307
308 regulator_disable(ab->v_ulpi);
309
310 /* USB is not the only consumer of Vintcore, restore old settings */
311 if (ab->flags & AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE) {
312 if (ab->saved_v_ulpi > 0) {
313 ret = regulator_set_voltage(ab->v_ulpi,
314 ab->saved_v_ulpi, ab->saved_v_ulpi);
315 if (ret < 0)
316 dev_err(ab->dev, "Failed to set the Vintcore to %duV, ret=%d\n",
317 ab->saved_v_ulpi, ret);
318 }
319
320 ret = regulator_set_load(ab->v_ulpi, 0);
321 if (ret < 0)
322 dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n",
323 ret);
324 }
325
326 regulator_disable(ab->v_ape);
327}
328
329static void ab8500_usb_wd_linkstatus(struct ab8500_usb *ab, u8 bit)
330{
331 /* Workaround for v2.0 bug # 31952 */
332 if (is_ab8500_2p0(ab->ab8500)) {
333 abx500_mask_and_set_register_interruptible(ab->dev,
334 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
335 bit, bit);
336 udelay(AB8500_V20_31952_DISABLE_DELAY_US);
337 }
338}
339
340static void ab8500_usb_phy_enable(struct ab8500_usb *ab, bool sel_host)
341{
342 u8 bit;
343 bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN :
344 AB8500_BIT_PHY_CTRL_DEVICE_EN;
345
346 /* mux and configure USB pins to DEFAULT state */
347 ab->pinctrl = pinctrl_get_select(ab->dev, PINCTRL_STATE_DEFAULT);
348 if (IS_ERR(ab->pinctrl))
349 dev_err(ab->dev, "could not get/set default pinstate\n");
350
351 if (clk_prepare_enable(ab->sysclk))
352 dev_err(ab->dev, "can't prepare/enable clock\n");
353
354 ab8500_usb_regulator_enable(ab);
355
356 abx500_mask_and_set_register_interruptible(ab->dev,
357 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
358 bit, bit);
359
360 if (ab->flags & AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK) {
361 if (sel_host)
362 abx500_set_register_interruptible(ab->dev,
363 AB8500_USB, AB8540_USB_OTG_CTL_REG,
364 AB8540_BIT_OTG_CTL_VBUS_VALID_ENA |
365 AB8540_BIT_OTG_CTL_ID_HOST_ENA |
366 AB8540_BIT_OTG_CTL_ID_DEV_ENA);
367 }
368}
369
370static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host)
371{
372 u8 bit;
373 bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN :
374 AB8500_BIT_PHY_CTRL_DEVICE_EN;
375
376 ab8500_usb_wd_linkstatus(ab, bit);
377
378 abx500_mask_and_set_register_interruptible(ab->dev,
379 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
380 bit, 0);
381
382 /* Needed to disable the phy.*/
383 ab8500_usb_wd_workaround(ab);
384
385 clk_disable_unprepare(ab->sysclk);
386
387 ab8500_usb_regulator_disable(ab);
388
389 if (!IS_ERR(ab->pinctrl)) {
390 /* configure USB pins to SLEEP state */
391 ab->pins_sleep = pinctrl_lookup_state(ab->pinctrl,
392 PINCTRL_STATE_SLEEP);
393
394 if (IS_ERR(ab->pins_sleep))
395 dev_dbg(ab->dev, "could not get sleep pinstate\n");
396 else if (pinctrl_select_state(ab->pinctrl, ab->pins_sleep))
397 dev_err(ab->dev, "could not set pins to sleep state\n");
398
399 /*
400 * as USB pins are shared with iddet, release them to allow
401 * iddet to request them
402 */
403 pinctrl_put(ab->pinctrl);
404 }
405}
406
407#define ab8500_usb_host_phy_en(ab) ab8500_usb_phy_enable(ab, true)
408#define ab8500_usb_host_phy_dis(ab) ab8500_usb_phy_disable(ab, true)
409#define ab8500_usb_peri_phy_en(ab) ab8500_usb_phy_enable(ab, false)
410#define ab8500_usb_peri_phy_dis(ab) ab8500_usb_phy_disable(ab, false)
411
412static int ab9540_usb_link_status_update(struct ab8500_usb *ab,
413 enum ab9540_usb_link_status lsts)
414{
415 enum ux500_musb_vbus_id_status event = 0;
416
417 dev_dbg(ab->dev, "ab9540_usb_link_status_update %d\n", lsts);
418
419 if (ab->previous_link_status_state == USB_LINK_HM_IDGND_9540 &&
420 (lsts == USB_LINK_STD_HOST_C_NS_9540 ||
421 lsts == USB_LINK_STD_HOST_NC_9540))
422 return 0;
423
424 if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_9540 &&
425 (lsts == USB_LINK_STD_HOST_NC_9540))
426 return 0;
427
428 ab->previous_link_status_state = lsts;
429
430 switch (lsts) {
431 case USB_LINK_ACA_RID_B_9540:
432 event = UX500_MUSB_RIDB;
433 case USB_LINK_NOT_CONFIGURED_9540:
434 case USB_LINK_RESERVED0_9540:
435 case USB_LINK_RESERVED1_9540:
436 case USB_LINK_RESERVED2_9540:
437 case USB_LINK_RESERVED3_9540:
438 if (ab->mode == USB_PERIPHERAL)
439 atomic_notifier_call_chain(&ab->phy.notifier,
440 UX500_MUSB_CLEAN, &ab->vbus_draw);
441 ab->mode = USB_IDLE;
442 ab->phy.otg->default_a = false;
443 ab->vbus_draw = 0;
444 if (event != UX500_MUSB_RIDB)
445 event = UX500_MUSB_NONE;
446 /* Fallback to default B_IDLE as nothing is connected. */
447 ab->phy.otg->state = OTG_STATE_B_IDLE;
448 usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
449 break;
450
451 case USB_LINK_ACA_RID_C_NM_9540:
452 event = UX500_MUSB_RIDC;
453 case USB_LINK_STD_HOST_NC_9540:
454 case USB_LINK_STD_HOST_C_NS_9540:
455 case USB_LINK_STD_HOST_C_S_9540:
456 case USB_LINK_CDP_9540:
457 if (ab->mode == USB_HOST) {
458 ab->mode = USB_PERIPHERAL;
459 ab8500_usb_host_phy_dis(ab);
460 ab8500_usb_peri_phy_en(ab);
461 atomic_notifier_call_chain(&ab->phy.notifier,
462 UX500_MUSB_PREPARE, &ab->vbus_draw);
463 usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
464 }
465 if (ab->mode == USB_IDLE) {
466 ab->mode = USB_PERIPHERAL;
467 ab8500_usb_peri_phy_en(ab);
468 atomic_notifier_call_chain(&ab->phy.notifier,
469 UX500_MUSB_PREPARE, &ab->vbus_draw);
470 usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
471 }
472 if (event != UX500_MUSB_RIDC)
473 event = UX500_MUSB_VBUS;
474 break;
475
476 case USB_LINK_ACA_RID_A_9540:
477 event = UX500_MUSB_RIDA;
478 case USB_LINK_HM_IDGND_9540:
479 case USB_LINK_STD_UPSTREAM_9540:
480 if (ab->mode == USB_PERIPHERAL) {
481 ab->mode = USB_HOST;
482 ab8500_usb_peri_phy_dis(ab);
483 ab8500_usb_host_phy_en(ab);
484 atomic_notifier_call_chain(&ab->phy.notifier,
485 UX500_MUSB_PREPARE, &ab->vbus_draw);
486 }
487 if (ab->mode == USB_IDLE) {
488 ab->mode = USB_HOST;
489 ab8500_usb_host_phy_en(ab);
490 atomic_notifier_call_chain(&ab->phy.notifier,
491 UX500_MUSB_PREPARE, &ab->vbus_draw);
492 }
493 ab->phy.otg->default_a = true;
494 if (event != UX500_MUSB_RIDA)
495 event = UX500_MUSB_ID;
496
497 atomic_notifier_call_chain(&ab->phy.notifier,
498 event, &ab->vbus_draw);
499 break;
500
501 case USB_LINK_DEDICATED_CHG_9540:
502 ab->mode = USB_DEDICATED_CHG;
503 event = UX500_MUSB_CHARGER;
504 atomic_notifier_call_chain(&ab->phy.notifier,
505 event, &ab->vbus_draw);
506 usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
507 break;
508
509 case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_9540:
510 case USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_9540:
511 if (!(is_ab9540_2p0_or_earlier(ab->ab8500))) {
512 event = UX500_MUSB_NONE;
513 if (ab->mode == USB_HOST) {
514 ab->phy.otg->default_a = false;
515 ab->vbus_draw = 0;
516 atomic_notifier_call_chain(&ab->phy.notifier,
517 event, &ab->vbus_draw);
518 ab8500_usb_host_phy_dis(ab);
519 ab->mode = USB_IDLE;
520 }
521 if (ab->mode == USB_PERIPHERAL) {
522 atomic_notifier_call_chain(&ab->phy.notifier,
523 event, &ab->vbus_draw);
524 ab8500_usb_peri_phy_dis(ab);
525 atomic_notifier_call_chain(&ab->phy.notifier,
526 UX500_MUSB_CLEAN,
527 &ab->vbus_draw);
528 ab->mode = USB_IDLE;
529 ab->phy.otg->default_a = false;
530 ab->vbus_draw = 0;
531 usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
532 }
533 }
534 break;
535
536 default:
537 break;
538 }
539
540 return 0;
541}
542
543static int ab8540_usb_link_status_update(struct ab8500_usb *ab,
544 enum ab8540_usb_link_status lsts)
545{
546 enum ux500_musb_vbus_id_status event = 0;
547
548 dev_dbg(ab->dev, "ab8540_usb_link_status_update %d\n", lsts);
549
550 if (ab->enabled_charging_detection) {
551 /* Disable USB Charger detection */
552 abx500_mask_and_set_register_interruptible(ab->dev,
553 AB8500_USB, AB8540_VBUS_CTRL_REG,
554 AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA, 0x00);
555 ab->enabled_charging_detection = false;
556 }
557
558 /*
559 * Spurious link_status interrupts are seen in case of a
560 * disconnection of a device in IDGND and RIDA stage
561 */
562 if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8540 &&
563 (lsts == USB_LINK_STD_HOST_C_NS_8540 ||
564 lsts == USB_LINK_STD_HOST_NC_8540))
565 return 0;
566
567 if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8540 &&
568 (lsts == USB_LINK_STD_HOST_NC_8540))
569 return 0;
570
571 ab->previous_link_status_state = lsts;
572
573 switch (lsts) {
574 case USB_LINK_ACA_RID_B_8540:
575 event = UX500_MUSB_RIDB;
576 case USB_LINK_NOT_CONFIGURED_8540:
577 case USB_LINK_RESERVED0_8540:
578 case USB_LINK_RESERVED1_8540:
579 case USB_LINK_RESERVED2_8540:
580 case USB_LINK_RESERVED3_8540:
581 ab->mode = USB_IDLE;
582 ab->phy.otg->default_a = false;
583 ab->vbus_draw = 0;
584 if (event != UX500_MUSB_RIDB)
585 event = UX500_MUSB_NONE;
586 /*
587 * Fallback to default B_IDLE as nothing
588 * is connected
589 */
590 ab->phy.otg->state = OTG_STATE_B_IDLE;
591 usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
592 break;
593
594 case USB_LINK_ACA_RID_C_NM_8540:
595 event = UX500_MUSB_RIDC;
596 case USB_LINK_STD_HOST_NC_8540:
597 case USB_LINK_STD_HOST_C_NS_8540:
598 case USB_LINK_STD_HOST_C_S_8540:
599 case USB_LINK_CDP_8540:
600 if (ab->mode == USB_IDLE) {
601 ab->mode = USB_PERIPHERAL;
602 ab8500_usb_peri_phy_en(ab);
603 atomic_notifier_call_chain(&ab->phy.notifier,
604 UX500_MUSB_PREPARE, &ab->vbus_draw);
605 usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
606 }
607 if (event != UX500_MUSB_RIDC)
608 event = UX500_MUSB_VBUS;
609 break;
610
611 case USB_LINK_ACA_RID_A_8540:
612 case USB_LINK_ACA_DOCK_CHGR_8540:
613 event = UX500_MUSB_RIDA;
614 case USB_LINK_HM_IDGND_8540:
615 case USB_LINK_STD_UPSTREAM_8540:
616 if (ab->mode == USB_IDLE) {
617 ab->mode = USB_HOST;
618 ab8500_usb_host_phy_en(ab);
619 atomic_notifier_call_chain(&ab->phy.notifier,
620 UX500_MUSB_PREPARE, &ab->vbus_draw);
621 }
622 ab->phy.otg->default_a = true;
623 if (event != UX500_MUSB_RIDA)
624 event = UX500_MUSB_ID;
625 atomic_notifier_call_chain(&ab->phy.notifier,
626 event, &ab->vbus_draw);
627 break;
628
629 case USB_LINK_DEDICATED_CHG_8540:
630 ab->mode = USB_DEDICATED_CHG;
631 event = UX500_MUSB_CHARGER;
632 atomic_notifier_call_chain(&ab->phy.notifier,
633 event, &ab->vbus_draw);
634 usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
635 break;
636
637 case USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8540:
638 case USB_LINK_STD_UPSTREAM_NO_IDGNG_VBUS_8540:
639 event = UX500_MUSB_NONE;
640 if (ab->mode == USB_HOST) {
641 ab->phy.otg->default_a = false;
642 ab->vbus_draw = 0;
643 atomic_notifier_call_chain(&ab->phy.notifier,
644 event, &ab->vbus_draw);
645 ab8500_usb_host_phy_dis(ab);
646 ab->mode = USB_IDLE;
647 }
648 if (ab->mode == USB_PERIPHERAL) {
649 atomic_notifier_call_chain(&ab->phy.notifier,
650 event, &ab->vbus_draw);
651 ab8500_usb_peri_phy_dis(ab);
652 atomic_notifier_call_chain(&ab->phy.notifier,
653 UX500_MUSB_CLEAN, &ab->vbus_draw);
654 ab->mode = USB_IDLE;
655 ab->phy.otg->default_a = false;
656 ab->vbus_draw = 0;
657 usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
658 }
659 break;
660
661 default:
662 event = UX500_MUSB_NONE;
663 break;
664 }
665
666 return 0;
667}
668
669static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
670 enum ab8505_usb_link_status lsts)
671{
672 enum ux500_musb_vbus_id_status event = 0;
673
674 dev_dbg(ab->dev, "ab8505_usb_link_status_update %d\n", lsts);
675
676 /*
677 * Spurious link_status interrupts are seen at the time of
678 * disconnection of a device in RIDA state
679 */
680 if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8505 &&
681 (lsts == USB_LINK_STD_HOST_NC_8505))
682 return 0;
683
684 ab->previous_link_status_state = lsts;
685
686 switch (lsts) {
687 case USB_LINK_ACA_RID_B_8505:
688 event = UX500_MUSB_RIDB;
689 case USB_LINK_NOT_CONFIGURED_8505:
690 case USB_LINK_RESERVED0_8505:
691 case USB_LINK_RESERVED1_8505:
692 case USB_LINK_RESERVED2_8505:
693 case USB_LINK_RESERVED3_8505:
694 ab->mode = USB_IDLE;
695 ab->phy.otg->default_a = false;
696 ab->vbus_draw = 0;
697 if (event != UX500_MUSB_RIDB)
698 event = UX500_MUSB_NONE;
699 /*
700 * Fallback to default B_IDLE as nothing
701 * is connected
702 */
703 ab->phy.otg->state = OTG_STATE_B_IDLE;
704 usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
705 break;
706
707 case USB_LINK_ACA_RID_C_NM_8505:
708 event = UX500_MUSB_RIDC;
709 case USB_LINK_STD_HOST_NC_8505:
710 case USB_LINK_STD_HOST_C_NS_8505:
711 case USB_LINK_STD_HOST_C_S_8505:
712 case USB_LINK_CDP_8505:
713 if (ab->mode == USB_IDLE) {
714 ab->mode = USB_PERIPHERAL;
715 ab8500_usb_peri_phy_en(ab);
716 atomic_notifier_call_chain(&ab->phy.notifier,
717 UX500_MUSB_PREPARE, &ab->vbus_draw);
718 usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
719 }
720 if (event != UX500_MUSB_RIDC)
721 event = UX500_MUSB_VBUS;
722 break;
723
724 case USB_LINK_ACA_RID_A_8505:
725 case USB_LINK_ACA_DOCK_CHGR_8505:
726 event = UX500_MUSB_RIDA;
727 case USB_LINK_HM_IDGND_8505:
728 if (ab->mode == USB_IDLE) {
729 ab->mode = USB_HOST;
730 ab8500_usb_host_phy_en(ab);
731 atomic_notifier_call_chain(&ab->phy.notifier,
732 UX500_MUSB_PREPARE, &ab->vbus_draw);
733 }
734 ab->phy.otg->default_a = true;
735 if (event != UX500_MUSB_RIDA)
736 event = UX500_MUSB_ID;
737 atomic_notifier_call_chain(&ab->phy.notifier,
738 event, &ab->vbus_draw);
739 break;
740
741 case USB_LINK_DEDICATED_CHG_8505:
742 ab->mode = USB_DEDICATED_CHG;
743 event = UX500_MUSB_CHARGER;
744 atomic_notifier_call_chain(&ab->phy.notifier,
745 event, &ab->vbus_draw);
746 usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
747 break;
748
749 default:
750 break;
751 }
752
753 return 0;
754}
755
756static int ab8500_usb_link_status_update(struct ab8500_usb *ab,
757 enum ab8500_usb_link_status lsts)
758{
759 enum ux500_musb_vbus_id_status event = 0;
760
761 dev_dbg(ab->dev, "ab8500_usb_link_status_update %d\n", lsts);
762
763 /*
764 * Spurious link_status interrupts are seen in case of a
765 * disconnection of a device in IDGND and RIDA stage
766 */
767 if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8500 &&
768 (lsts == USB_LINK_STD_HOST_C_NS_8500 ||
769 lsts == USB_LINK_STD_HOST_NC_8500))
770 return 0;
771
772 if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8500 &&
773 lsts == USB_LINK_STD_HOST_NC_8500)
774 return 0;
775
776 ab->previous_link_status_state = lsts;
777
778 switch (lsts) {
779 case USB_LINK_ACA_RID_B_8500:
780 event = UX500_MUSB_RIDB;
781 case USB_LINK_NOT_CONFIGURED_8500:
782 case USB_LINK_NOT_VALID_LINK_8500:
783 ab->mode = USB_IDLE;
784 ab->phy.otg->default_a = false;
785 ab->vbus_draw = 0;
786 if (event != UX500_MUSB_RIDB)
787 event = UX500_MUSB_NONE;
788 /* Fallback to default B_IDLE as nothing is connected */
789 ab->phy.otg->state = OTG_STATE_B_IDLE;
790 usb_phy_set_event(&ab->phy, USB_EVENT_NONE);
791 break;
792
793 case USB_LINK_ACA_RID_C_NM_8500:
794 case USB_LINK_ACA_RID_C_HS_8500:
795 case USB_LINK_ACA_RID_C_HS_CHIRP_8500:
796 event = UX500_MUSB_RIDC;
797 case USB_LINK_STD_HOST_NC_8500:
798 case USB_LINK_STD_HOST_C_NS_8500:
799 case USB_LINK_STD_HOST_C_S_8500:
800 case USB_LINK_HOST_CHG_NM_8500:
801 case USB_LINK_HOST_CHG_HS_8500:
802 case USB_LINK_HOST_CHG_HS_CHIRP_8500:
803 if (ab->mode == USB_IDLE) {
804 ab->mode = USB_PERIPHERAL;
805 ab8500_usb_peri_phy_en(ab);
806 atomic_notifier_call_chain(&ab->phy.notifier,
807 UX500_MUSB_PREPARE, &ab->vbus_draw);
808 usb_phy_set_event(&ab->phy, USB_EVENT_ENUMERATED);
809 }
810 if (event != UX500_MUSB_RIDC)
811 event = UX500_MUSB_VBUS;
812 break;
813
814 case USB_LINK_ACA_RID_A_8500:
815 event = UX500_MUSB_RIDA;
816 case USB_LINK_HM_IDGND_8500:
817 if (ab->mode == USB_IDLE) {
818 ab->mode = USB_HOST;
819 ab8500_usb_host_phy_en(ab);
820 atomic_notifier_call_chain(&ab->phy.notifier,
821 UX500_MUSB_PREPARE, &ab->vbus_draw);
822 }
823 ab->phy.otg->default_a = true;
824 if (event != UX500_MUSB_RIDA)
825 event = UX500_MUSB_ID;
826 atomic_notifier_call_chain(&ab->phy.notifier,
827 event, &ab->vbus_draw);
828 break;
829
830 case USB_LINK_DEDICATED_CHG_8500:
831 ab->mode = USB_DEDICATED_CHG;
832 event = UX500_MUSB_CHARGER;
833 atomic_notifier_call_chain(&ab->phy.notifier,
834 event, &ab->vbus_draw);
835 usb_phy_set_event(&ab->phy, USB_EVENT_CHARGER);
836 break;
837
838 case USB_LINK_RESERVED_8500:
839 break;
840 }
841
842 return 0;
843}
844
845/*
846 * Connection Sequence:
847 * 1. Link Status Interrupt
848 * 2. Enable AB clock
849 * 3. Enable AB regulators
850 * 4. Enable USB phy
851 * 5. Reset the musb controller
852 * 6. Switch the ULPI GPIO pins to fucntion mode
853 * 7. Enable the musb Peripheral5 clock
854 * 8. Restore MUSB context
855 */
856static int abx500_usb_link_status_update(struct ab8500_usb *ab)
857{
858 u8 reg;
859 int ret = 0;
860
861 if (is_ab8500(ab->ab8500)) {
862 enum ab8500_usb_link_status lsts;
863
864 abx500_get_register_interruptible(ab->dev,
865 AB8500_USB, AB8500_USB_LINE_STAT_REG, ®);
866 lsts = (reg >> 3) & 0x0F;
867 ret = ab8500_usb_link_status_update(ab, lsts);
868 } else if (is_ab8505(ab->ab8500)) {
869 enum ab8505_usb_link_status lsts;
870
871 abx500_get_register_interruptible(ab->dev,
872 AB8500_USB, AB8505_USB_LINE_STAT_REG, ®);
873 lsts = (reg >> 3) & 0x1F;
874 ret = ab8505_usb_link_status_update(ab, lsts);
875 } else if (is_ab8540(ab->ab8500)) {
876 enum ab8540_usb_link_status lsts;
877
878 abx500_get_register_interruptible(ab->dev,
879 AB8500_USB, AB8540_USB_LINK_STAT_REG, ®);
880 lsts = (reg >> 3) & 0xFF;
881 ret = ab8540_usb_link_status_update(ab, lsts);
882 } else if (is_ab9540(ab->ab8500)) {
883 enum ab9540_usb_link_status lsts;
884
885 abx500_get_register_interruptible(ab->dev,
886 AB8500_USB, AB9540_USB_LINK_STAT_REG, ®);
887 lsts = (reg >> 3) & 0xFF;
888 ret = ab9540_usb_link_status_update(ab, lsts);
889 }
890
891 return ret;
892}
893
894/*
895 * Disconnection Sequence:
896 * 1. Disconnect Interrupt
897 * 2. Disable regulators
898 * 3. Disable AB clock
899 * 4. Disable the Phy
900 * 5. Link Status Interrupt
901 * 6. Disable Musb Clock
902 */
903static irqreturn_t ab8500_usb_disconnect_irq(int irq, void *data)
904{
905 struct ab8500_usb *ab = (struct ab8500_usb *) data;
906 enum usb_phy_events event = UX500_MUSB_NONE;
907
908 /* Link status will not be updated till phy is disabled. */
909 if (ab->mode == USB_HOST) {
910 ab->phy.otg->default_a = false;
911 ab->vbus_draw = 0;
912 atomic_notifier_call_chain(&ab->phy.notifier,
913 event, &ab->vbus_draw);
914 ab8500_usb_host_phy_dis(ab);
915 ab->mode = USB_IDLE;
916 }
917
918 if (ab->mode == USB_PERIPHERAL) {
919 atomic_notifier_call_chain(&ab->phy.notifier,
920 event, &ab->vbus_draw);
921 ab8500_usb_peri_phy_dis(ab);
922 atomic_notifier_call_chain(&ab->phy.notifier,
923 UX500_MUSB_CLEAN, &ab->vbus_draw);
924 ab->mode = USB_IDLE;
925 ab->phy.otg->default_a = false;
926 ab->vbus_draw = 0;
927 }
928
929 if (is_ab8500_2p0(ab->ab8500)) {
930 if (ab->mode == USB_DEDICATED_CHG) {
931 ab8500_usb_wd_linkstatus(ab,
932 AB8500_BIT_PHY_CTRL_DEVICE_EN);
933 abx500_mask_and_set_register_interruptible(ab->dev,
934 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
935 AB8500_BIT_PHY_CTRL_DEVICE_EN, 0);
936 }
937 }
938
939 return IRQ_HANDLED;
940}
941
942static irqreturn_t ab8500_usb_link_status_irq(int irq, void *data)
943{
944 struct ab8500_usb *ab = (struct ab8500_usb *)data;
945
946 abx500_usb_link_status_update(ab);
947
948 return IRQ_HANDLED;
949}
950
951static void ab8500_usb_phy_disable_work(struct work_struct *work)
952{
953 struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
954 phy_dis_work);
955
956 if (!ab->phy.otg->host)
957 ab8500_usb_host_phy_dis(ab);
958
959 if (!ab->phy.otg->gadget)
960 ab8500_usb_peri_phy_dis(ab);
961}
962
963/* Check if VBUS is set and linkstatus has not detected a cable. */
964static bool ab8500_usb_check_vbus_status(struct ab8500_usb *ab)
965{
966 u8 isource2;
967 u8 reg;
968 enum ab8540_usb_link_status lsts;
969
970 abx500_get_register_interruptible(ab->dev,
971 AB8500_INTERRUPT, AB8500_IT_SOURCE2_REG,
972 &isource2);
973
974 /* If Vbus is below 3.6V abort */
975 if (!(isource2 & AB8500_BIT_SOURCE2_VBUSDET))
976 return false;
977
978 abx500_get_register_interruptible(ab->dev,
979 AB8500_USB, AB8540_USB_LINK_STAT_REG,
980 ®);
981
982 lsts = (reg >> 3) & 0xFF;
983
984 /* Check if linkstatus has detected a cable */
985 if (lsts)
986 return false;
987
988 return true;
989}
990
991/* re-trigger charger detection again with watchdog re-kick. */
992static void ab8500_usb_vbus_turn_on_event_work(struct work_struct *work)
993{
994 struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
995 vbus_event_work);
996
997 if (ab->mode != USB_IDLE)
998 return;
999
1000 abx500_set_register_interruptible(ab->dev,
1001 AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG,
1002 AB8500_BIT_WD_CTRL_ENABLE);
1003
1004 udelay(100);
1005
1006 abx500_set_register_interruptible(ab->dev,
1007 AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG,
1008 AB8500_BIT_WD_CTRL_ENABLE | AB8500_BIT_WD_CTRL_KICK);
1009
1010 udelay(100);
1011
1012 /* Disable Main watchdog */
1013 abx500_set_register_interruptible(ab->dev,
1014 AB8500_SYS_CTRL2_BLOCK, AB8500_MAIN_WD_CTRL_REG,
1015 0x0);
1016
1017 /* Enable USB Charger detection */
1018 abx500_mask_and_set_register_interruptible(ab->dev,
1019 AB8500_USB, AB8540_VBUS_CTRL_REG,
1020 AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA,
1021 AB8540_BIT_VBUS_CTRL_CHARG_DET_ENA);
1022
1023 ab->enabled_charging_detection = true;
1024}
1025
1026static unsigned ab8500_eyediagram_workaroud(struct ab8500_usb *ab, unsigned mA)
1027{
1028 /*
1029 * AB8500 V2 has eye diagram issues when drawing more than 100mA from
1030 * VBUS. Set charging current to 100mA in case of standard host
1031 */
1032 if (is_ab8500_2p0_or_earlier(ab->ab8500))
1033 if (mA > 100)
1034 mA = 100;
1035
1036 return mA;
1037}
1038
1039static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA)
1040{
1041 struct ab8500_usb *ab;
1042
1043 if (!phy)
1044 return -ENODEV;
1045
1046 ab = phy_to_ab(phy);
1047
1048 mA = ab8500_eyediagram_workaroud(ab, mA);
1049
1050 ab->vbus_draw = mA;
1051
1052 atomic_notifier_call_chain(&ab->phy.notifier,
1053 UX500_MUSB_VBUS, &ab->vbus_draw);
1054
1055 return 0;
1056}
1057
1058static int ab8500_usb_set_suspend(struct usb_phy *x, int suspend)
1059{
1060 /* TODO */
1061 return 0;
1062}
1063
1064static int ab8500_usb_set_peripheral(struct usb_otg *otg,
1065 struct usb_gadget *gadget)
1066{
1067 struct ab8500_usb *ab;
1068
1069 if (!otg)
1070 return -ENODEV;
1071
1072 ab = phy_to_ab(otg->usb_phy);
1073
1074 ab->phy.otg->gadget = gadget;
1075
1076 /* Some drivers call this function in atomic context.
1077 * Do not update ab8500 registers directly till this
1078 * is fixed.
1079 */
1080
1081 if ((ab->mode != USB_IDLE) && !gadget) {
1082 ab->mode = USB_IDLE;
1083 schedule_work(&ab->phy_dis_work);
1084 }
1085
1086 return 0;
1087}
1088
1089static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
1090{
1091 struct ab8500_usb *ab;
1092
1093 if (!otg)
1094 return -ENODEV;
1095
1096 ab = phy_to_ab(otg->usb_phy);
1097
1098 ab->phy.otg->host = host;
1099
1100 /* Some drivers call this function in atomic context.
1101 * Do not update ab8500 registers directly till this
1102 * is fixed.
1103 */
1104
1105 if ((ab->mode != USB_IDLE) && !host) {
1106 ab->mode = USB_IDLE;
1107 schedule_work(&ab->phy_dis_work);
1108 }
1109
1110 return 0;
1111}
1112
1113static void ab8500_usb_restart_phy(struct ab8500_usb *ab)
1114{
1115 abx500_mask_and_set_register_interruptible(ab->dev,
1116 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
1117 AB8500_BIT_PHY_CTRL_DEVICE_EN,
1118 AB8500_BIT_PHY_CTRL_DEVICE_EN);
1119
1120 udelay(100);
1121
1122 abx500_mask_and_set_register_interruptible(ab->dev,
1123 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
1124 AB8500_BIT_PHY_CTRL_DEVICE_EN,
1125 0);
1126
1127 abx500_mask_and_set_register_interruptible(ab->dev,
1128 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
1129 AB8500_BIT_PHY_CTRL_HOST_EN,
1130 AB8500_BIT_PHY_CTRL_HOST_EN);
1131
1132 udelay(100);
1133
1134 abx500_mask_and_set_register_interruptible(ab->dev,
1135 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
1136 AB8500_BIT_PHY_CTRL_HOST_EN,
1137 0);
1138}
1139
1140static int ab8500_usb_regulator_get(struct ab8500_usb *ab)
1141{
1142 int err;
1143
1144 ab->v_ape = devm_regulator_get(ab->dev, "v-ape");
1145 if (IS_ERR(ab->v_ape)) {
1146 dev_err(ab->dev, "Could not get v-ape supply\n");
1147 err = PTR_ERR(ab->v_ape);
1148 return err;
1149 }
1150
1151 ab->v_ulpi = devm_regulator_get(ab->dev, "vddulpivio18");
1152 if (IS_ERR(ab->v_ulpi)) {
1153 dev_err(ab->dev, "Could not get vddulpivio18 supply\n");
1154 err = PTR_ERR(ab->v_ulpi);
1155 return err;
1156 }
1157
1158 ab->v_musb = devm_regulator_get(ab->dev, "musb_1v8");
1159 if (IS_ERR(ab->v_musb)) {
1160 dev_err(ab->dev, "Could not get musb_1v8 supply\n");
1161 err = PTR_ERR(ab->v_musb);
1162 return err;
1163 }
1164
1165 return 0;
1166}
1167
1168static int ab8500_usb_irq_setup(struct platform_device *pdev,
1169 struct ab8500_usb *ab)
1170{
1171 int err;
1172 int irq;
1173
1174 if (ab->flags & AB8500_USB_FLAG_USE_LINK_STATUS_IRQ) {
1175 irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS");
1176 if (irq < 0) {
1177 dev_err(&pdev->dev, "Link status irq not found\n");
1178 return irq;
1179 }
1180 err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
1181 ab8500_usb_link_status_irq,
1182 IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT,
1183 "usb-link-status", ab);
1184 if (err < 0) {
1185 dev_err(ab->dev, "request_irq failed for link status irq\n");
1186 return err;
1187 }
1188 }
1189
1190 if (ab->flags & AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ) {
1191 irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F");
1192 if (irq < 0) {
1193 dev_err(&pdev->dev, "ID fall irq not found\n");
1194 return irq;
1195 }
1196 err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
1197 ab8500_usb_disconnect_irq,
1198 IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT,
1199 "usb-id-fall", ab);
1200 if (err < 0) {
1201 dev_err(ab->dev, "request_irq failed for ID fall irq\n");
1202 return err;
1203 }
1204 }
1205
1206 if (ab->flags & AB8500_USB_FLAG_USE_VBUS_DET_IRQ) {
1207 irq = platform_get_irq_byname(pdev, "VBUS_DET_F");
1208 if (irq < 0) {
1209 dev_err(&pdev->dev, "VBUS fall irq not found\n");
1210 return irq;
1211 }
1212 err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
1213 ab8500_usb_disconnect_irq,
1214 IRQF_NO_SUSPEND | IRQF_SHARED | IRQF_ONESHOT,
1215 "usb-vbus-fall", ab);
1216 if (err < 0) {
1217 dev_err(ab->dev, "request_irq failed for Vbus fall irq\n");
1218 return err;
1219 }
1220 }
1221
1222 return 0;
1223}
1224
1225static void ab8500_usb_set_ab8500_tuning_values(struct ab8500_usb *ab)
1226{
1227 int err;
1228
1229 /* Enable the PBT/Bank 0x12 access */
1230 err = abx500_set_register_interruptible(ab->dev,
1231 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01);
1232 if (err < 0)
1233 dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
1234 err);
1235
1236 err = abx500_set_register_interruptible(ab->dev,
1237 AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8);
1238 if (err < 0)
1239 dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
1240 err);
1241
1242 err = abx500_set_register_interruptible(ab->dev,
1243 AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x00);
1244 if (err < 0)
1245 dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
1246 err);
1247
1248 err = abx500_set_register_interruptible(ab->dev,
1249 AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x78);
1250 if (err < 0)
1251 dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
1252 err);
1253
1254 /* Switch to normal mode/disable Bank 0x12 access */
1255 err = abx500_set_register_interruptible(ab->dev,
1256 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00);
1257 if (err < 0)
1258 dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
1259 err);
1260}
1261
1262static void ab8500_usb_set_ab8505_tuning_values(struct ab8500_usb *ab)
1263{
1264 int err;
1265
1266 /* Enable the PBT/Bank 0x12 access */
1267 err = abx500_mask_and_set_register_interruptible(ab->dev,
1268 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS,
1269 0x01, 0x01);
1270 if (err < 0)
1271 dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
1272 err);
1273
1274 err = abx500_mask_and_set_register_interruptible(ab->dev,
1275 AB8500_DEBUG, AB8500_USB_PHY_TUNE1,
1276 0xC8, 0xC8);
1277 if (err < 0)
1278 dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
1279 err);
1280
1281 err = abx500_mask_and_set_register_interruptible(ab->dev,
1282 AB8500_DEBUG, AB8500_USB_PHY_TUNE2,
1283 0x60, 0x60);
1284 if (err < 0)
1285 dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
1286 err);
1287
1288 err = abx500_mask_and_set_register_interruptible(ab->dev,
1289 AB8500_DEBUG, AB8500_USB_PHY_TUNE3,
1290 0xFC, 0x80);
1291
1292 if (err < 0)
1293 dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
1294 err);
1295
1296 /* Switch to normal mode/disable Bank 0x12 access */
1297 err = abx500_mask_and_set_register_interruptible(ab->dev,
1298 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS,
1299 0x00, 0x00);
1300 if (err < 0)
1301 dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
1302 err);
1303}
1304
1305static void ab8500_usb_set_ab8540_tuning_values(struct ab8500_usb *ab)
1306{
1307 int err;
1308
1309 err = abx500_set_register_interruptible(ab->dev,
1310 AB8540_DEBUG, AB8500_USB_PHY_TUNE1, 0xCC);
1311 if (err < 0)
1312 dev_err(ab->dev, "Failed to set PHY_TUNE1 register ret=%d\n",
1313 err);
1314
1315 err = abx500_set_register_interruptible(ab->dev,
1316 AB8540_DEBUG, AB8500_USB_PHY_TUNE2, 0x60);
1317 if (err < 0)
1318 dev_err(ab->dev, "Failed to set PHY_TUNE2 register ret=%d\n",
1319 err);
1320
1321 err = abx500_set_register_interruptible(ab->dev,
1322 AB8540_DEBUG, AB8500_USB_PHY_TUNE3, 0x90);
1323 if (err < 0)
1324 dev_err(ab->dev, "Failed to set PHY_TUNE3 regester ret=%d\n",
1325 err);
1326}
1327
1328static void ab8500_usb_set_ab9540_tuning_values(struct ab8500_usb *ab)
1329{
1330 int err;
1331
1332 /* Enable the PBT/Bank 0x12 access */
1333 err = abx500_set_register_interruptible(ab->dev,
1334 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01);
1335 if (err < 0)
1336 dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
1337 err);
1338
1339 err = abx500_set_register_interruptible(ab->dev,
1340 AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8);
1341 if (err < 0)
1342 dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
1343 err);
1344
1345 err = abx500_set_register_interruptible(ab->dev,
1346 AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x60);
1347 if (err < 0)
1348 dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
1349 err);
1350
1351 err = abx500_set_register_interruptible(ab->dev,
1352 AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x80);
1353 if (err < 0)
1354 dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
1355 err);
1356
1357 /* Switch to normal mode/disable Bank 0x12 access */
1358 err = abx500_set_register_interruptible(ab->dev,
1359 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00);
1360 if (err < 0)
1361 dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
1362 err);
1363}
1364
1365static int ab8500_usb_probe(struct platform_device *pdev)
1366{
1367 struct ab8500_usb *ab;
1368 struct ab8500 *ab8500;
1369 struct usb_otg *otg;
1370 int err;
1371 int rev;
1372
1373 ab8500 = dev_get_drvdata(pdev->dev.parent);
1374 rev = abx500_get_chip_id(&pdev->dev);
1375
1376 if (is_ab8500_1p1_or_earlier(ab8500)) {
1377 dev_err(&pdev->dev, "Unsupported AB8500 chip rev=%d\n", rev);
1378 return -ENODEV;
1379 }
1380
1381 ab = devm_kzalloc(&pdev->dev, sizeof(*ab), GFP_KERNEL);
1382 if (!ab)
1383 return -ENOMEM;
1384
1385 otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
1386 if (!otg)
1387 return -ENOMEM;
1388
1389 ab->dev = &pdev->dev;
1390 ab->ab8500 = ab8500;
1391 ab->phy.dev = ab->dev;
1392 ab->phy.otg = otg;
1393 ab->phy.label = "ab8500";
1394 ab->phy.set_suspend = ab8500_usb_set_suspend;
1395 ab->phy.set_power = ab8500_usb_set_power;
1396 ab->phy.otg->state = OTG_STATE_UNDEFINED;
1397
1398 otg->usb_phy = &ab->phy;
1399 otg->set_host = ab8500_usb_set_host;
1400 otg->set_peripheral = ab8500_usb_set_peripheral;
1401
1402 if (is_ab8500(ab->ab8500)) {
1403 ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
1404 AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ |
1405 AB8500_USB_FLAG_USE_VBUS_DET_IRQ |
1406 AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
1407 } else if (is_ab8505(ab->ab8500)) {
1408 ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
1409 AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ |
1410 AB8500_USB_FLAG_USE_VBUS_DET_IRQ |
1411 AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
1412 } else if (is_ab8540(ab->ab8500)) {
1413 ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
1414 AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS |
1415 AB8500_USB_FLAG_USE_VBUS_HOST_QUIRK |
1416 AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
1417 } else if (is_ab9540(ab->ab8500)) {
1418 ab->flags |= AB8500_USB_FLAG_USE_LINK_STATUS_IRQ |
1419 AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
1420 if (is_ab9540_2p0_or_earlier(ab->ab8500))
1421 ab->flags |= AB8500_USB_FLAG_USE_ID_WAKEUP_IRQ |
1422 AB8500_USB_FLAG_USE_VBUS_DET_IRQ;
1423 }
1424
1425 /* Disable regulator voltage setting for AB8500 <= v2.0 */
1426 if (is_ab8500_2p0_or_earlier(ab->ab8500))
1427 ab->flags &= ~AB8500_USB_FLAG_REGULATOR_SET_VOLTAGE;
1428
1429 platform_set_drvdata(pdev, ab);
1430
1431 /* all: Disable phy when called from set_host and set_peripheral */
1432 INIT_WORK(&ab->phy_dis_work, ab8500_usb_phy_disable_work);
1433
1434 INIT_WORK(&ab->vbus_event_work, ab8500_usb_vbus_turn_on_event_work);
1435
1436 err = ab8500_usb_regulator_get(ab);
1437 if (err)
1438 return err;
1439
1440 ab->sysclk = devm_clk_get(ab->dev, "sysclk");
1441 if (IS_ERR(ab->sysclk)) {
1442 dev_err(ab->dev, "Could not get sysclk.\n");
1443 return PTR_ERR(ab->sysclk);
1444 }
1445
1446 err = ab8500_usb_irq_setup(pdev, ab);
1447 if (err < 0)
1448 return err;
1449
1450 err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2);
1451 if (err) {
1452 dev_err(&pdev->dev, "Can't register transceiver\n");
1453 return err;
1454 }
1455
1456 if (is_ab8500(ab->ab8500) && !is_ab8500_2p0_or_earlier(ab->ab8500))
1457 /* Phy tuning values for AB8500 > v2.0 */
1458 ab8500_usb_set_ab8500_tuning_values(ab);
1459 else if (is_ab8505(ab->ab8500))
1460 /* Phy tuning values for AB8505 */
1461 ab8500_usb_set_ab8505_tuning_values(ab);
1462 else if (is_ab8540(ab->ab8500))
1463 /* Phy tuning values for AB8540 */
1464 ab8500_usb_set_ab8540_tuning_values(ab);
1465 else if (is_ab9540(ab->ab8500))
1466 /* Phy tuning values for AB9540 */
1467 ab8500_usb_set_ab9540_tuning_values(ab);
1468
1469 /* Needed to enable ID detection. */
1470 ab8500_usb_wd_workaround(ab);
1471
1472 /*
1473 * This is required for usb-link-status to work properly when a
1474 * cable is connected at boot time.
1475 */
1476 ab8500_usb_restart_phy(ab);
1477
1478 if (ab->flags & AB8500_USB_FLAG_USE_CHECK_VBUS_STATUS) {
1479 if (ab8500_usb_check_vbus_status(ab))
1480 schedule_work(&ab->vbus_event_work);
1481 }
1482
1483 abx500_usb_link_status_update(ab);
1484
1485 dev_info(&pdev->dev, "revision 0x%2x driver initialized\n", rev);
1486
1487 return 0;
1488}
1489
1490static int ab8500_usb_remove(struct platform_device *pdev)
1491{
1492 struct ab8500_usb *ab = platform_get_drvdata(pdev);
1493
1494 cancel_work_sync(&ab->phy_dis_work);
1495 cancel_work_sync(&ab->vbus_event_work);
1496
1497 usb_remove_phy(&ab->phy);
1498
1499 if (ab->mode == USB_HOST)
1500 ab8500_usb_host_phy_dis(ab);
1501 else if (ab->mode == USB_PERIPHERAL)
1502 ab8500_usb_peri_phy_dis(ab);
1503
1504 return 0;
1505}
1506
1507static const struct platform_device_id ab8500_usb_devtype[] = {
1508 { .name = "ab8500-usb", },
1509 { .name = "ab8540-usb", },
1510 { .name = "ab9540-usb", },
1511 { /* sentinel */ }
1512};
1513MODULE_DEVICE_TABLE(platform, ab8500_usb_devtype);
1514
1515static struct platform_driver ab8500_usb_driver = {
1516 .probe = ab8500_usb_probe,
1517 .remove = ab8500_usb_remove,
1518 .id_table = ab8500_usb_devtype,
1519 .driver = {
1520 .name = "abx5x0-usb",
1521 },
1522};
1523
1524static int __init ab8500_usb_init(void)
1525{
1526 return platform_driver_register(&ab8500_usb_driver);
1527}
1528subsys_initcall(ab8500_usb_init);
1529
1530static void __exit ab8500_usb_exit(void)
1531{
1532 platform_driver_unregister(&ab8500_usb_driver);
1533}
1534module_exit(ab8500_usb_exit);
1535
1536MODULE_AUTHOR("ST-Ericsson AB");
1537MODULE_DESCRIPTION("AB8500 family usb transceiver driver");
1538MODULE_LICENSE("GPL");