2 * drivers/usb/otg/ab8500_usb.c
4 * USB transceiver driver for AB8500 chip
6 * Copyright (C) 2010 ST-Ericsson AB
7 * Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
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.
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.
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.
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 #include <linux/pinctrl/consumer.h>
38 /* Bank AB8500_SYS_CTRL2_BLOCK */
39 #define AB8500_MAIN_WD_CTRL_REG 0x01
42 #define AB8500_USB_LINE_STAT_REG 0x80
43 #define AB8505_USB_LINE_STAT_REG 0x94
44 #define AB8500_USB_PHY_CTRL_REG 0x8A
46 /* Bank AB8500_DEVELOPMENT */
47 #define AB8500_BANK12_ACCESS 0x00
49 /* Bank AB8500_DEBUG */
50 #define AB8500_USB_PHY_TUNE1 0x05
51 #define AB8500_USB_PHY_TUNE2 0x06
52 #define AB8500_USB_PHY_TUNE3 0x07
54 #define AB8500_BIT_OTG_STAT_ID (1 << 0)
55 #define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0)
56 #define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1)
57 #define AB8500_BIT_WD_CTRL_ENABLE (1 << 0)
58 #define AB8500_BIT_WD_CTRL_KICK (1 << 1)
60 #define AB8500_WD_KICK_DELAY_US 100 /* usec */
61 #define AB8500_WD_V11_DISABLE_DELAY_US 100 /* usec */
62 #define AB8500_V20_31952_DISABLE_DELAY_US 100 /* usec */
64 /* Usb line status register */
65 enum ab8500_usb_link_status {
66 USB_LINK_NOT_CONFIGURED_8500 = 0,
67 USB_LINK_STD_HOST_NC_8500,
68 USB_LINK_STD_HOST_C_NS_8500,
69 USB_LINK_STD_HOST_C_S_8500,
70 USB_LINK_HOST_CHG_NM_8500,
71 USB_LINK_HOST_CHG_HS_8500,
72 USB_LINK_HOST_CHG_HS_CHIRP_8500,
73 USB_LINK_DEDICATED_CHG_8500,
74 USB_LINK_ACA_RID_A_8500,
75 USB_LINK_ACA_RID_B_8500,
76 USB_LINK_ACA_RID_C_NM_8500,
77 USB_LINK_ACA_RID_C_HS_8500,
78 USB_LINK_ACA_RID_C_HS_CHIRP_8500,
79 USB_LINK_HM_IDGND_8500,
80 USB_LINK_RESERVED_8500,
81 USB_LINK_NOT_VALID_LINK_8500,
84 enum ab8505_usb_link_status {
85 USB_LINK_NOT_CONFIGURED_8505 = 0,
86 USB_LINK_STD_HOST_NC_8505,
87 USB_LINK_STD_HOST_C_NS_8505,
88 USB_LINK_STD_HOST_C_S_8505,
90 USB_LINK_RESERVED0_8505,
91 USB_LINK_RESERVED1_8505,
92 USB_LINK_DEDICATED_CHG_8505,
93 USB_LINK_ACA_RID_A_8505,
94 USB_LINK_ACA_RID_B_8505,
95 USB_LINK_ACA_RID_C_NM_8505,
96 USB_LINK_RESERVED2_8505,
97 USB_LINK_RESERVED3_8505,
98 USB_LINK_HM_IDGND_8505,
99 USB_LINK_CHARGERPORT_NOT_OK_8505,
100 USB_LINK_CHARGER_DM_HIGH_8505,
101 USB_LINK_PHYEN_NO_VBUS_NO_IDGND_8505,
102 USB_LINK_STD_UPSTREAM_NO_IDGNG_NO_VBUS_8505,
103 USB_LINK_STD_UPSTREAM_8505,
104 USB_LINK_CHARGER_SE1_8505,
105 USB_LINK_CARKIT_CHGR_1_8505,
106 USB_LINK_CARKIT_CHGR_2_8505,
107 USB_LINK_ACA_DOCK_CHGR_8505,
108 USB_LINK_SAMSUNG_BOOT_CBL_PHY_EN_8505,
109 USB_LINK_SAMSUNG_BOOT_CBL_PHY_DISB_8505,
110 USB_LINK_SAMSUNG_UART_CBL_PHY_EN_8505,
111 USB_LINK_SAMSUNG_UART_CBL_PHY_DISB_8505,
112 USB_LINK_MOTOROLA_FACTORY_CBL_PHY_EN_8505,
115 enum ab8500_usb_mode {
125 struct ab8500 *ab8500;
127 struct work_struct phy_dis_work;
128 enum ab8500_usb_mode mode;
129 struct regulator *v_ape;
130 struct regulator *v_musb;
131 struct regulator *v_ulpi;
133 int previous_link_status_state;
134 struct pinctrl *pinctrl;
135 struct pinctrl_state *pins_sleep;
138 static inline struct ab8500_usb *phy_to_ab(struct usb_phy *x)
140 return container_of(x, struct ab8500_usb, phy);
143 static void ab8500_usb_wd_workaround(struct ab8500_usb *ab)
145 abx500_set_register_interruptible(ab->dev,
146 AB8500_SYS_CTRL2_BLOCK,
147 AB8500_MAIN_WD_CTRL_REG,
148 AB8500_BIT_WD_CTRL_ENABLE);
150 udelay(AB8500_WD_KICK_DELAY_US);
152 abx500_set_register_interruptible(ab->dev,
153 AB8500_SYS_CTRL2_BLOCK,
154 AB8500_MAIN_WD_CTRL_REG,
155 (AB8500_BIT_WD_CTRL_ENABLE
156 | AB8500_BIT_WD_CTRL_KICK));
158 udelay(AB8500_WD_V11_DISABLE_DELAY_US);
160 abx500_set_register_interruptible(ab->dev,
161 AB8500_SYS_CTRL2_BLOCK,
162 AB8500_MAIN_WD_CTRL_REG,
166 static void ab8500_usb_regulator_enable(struct ab8500_usb *ab)
170 ret = regulator_enable(ab->v_ape);
172 dev_err(ab->dev, "Failed to enable v-ape\n");
174 if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
175 ab->saved_v_ulpi = regulator_get_voltage(ab->v_ulpi);
176 if (ab->saved_v_ulpi < 0)
177 dev_err(ab->dev, "Failed to get v_ulpi voltage\n");
179 ret = regulator_set_voltage(ab->v_ulpi, 1300000, 1350000);
181 dev_err(ab->dev, "Failed to set the Vintcore to 1.3V, ret=%d\n",
184 ret = regulator_set_optimum_mode(ab->v_ulpi, 28000);
186 dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n",
190 ret = regulator_enable(ab->v_ulpi);
192 dev_err(ab->dev, "Failed to enable vddulpivio18\n");
194 if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
195 volt = regulator_get_voltage(ab->v_ulpi);
196 if ((volt != 1300000) && (volt != 1350000))
197 dev_err(ab->dev, "Vintcore is not set to 1.3V volt=%d\n",
201 ret = regulator_enable(ab->v_musb);
203 dev_err(ab->dev, "Failed to enable musb_1v8\n");
206 static void ab8500_usb_regulator_disable(struct ab8500_usb *ab)
210 regulator_disable(ab->v_musb);
212 regulator_disable(ab->v_ulpi);
214 /* USB is not the only consumer of Vintcore, restore old settings */
215 if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
216 if (ab->saved_v_ulpi > 0) {
217 ret = regulator_set_voltage(ab->v_ulpi,
218 ab->saved_v_ulpi, ab->saved_v_ulpi);
220 dev_err(ab->dev, "Failed to set the Vintcore to %duV, ret=%d\n",
221 ab->saved_v_ulpi, ret);
224 ret = regulator_set_optimum_mode(ab->v_ulpi, 0);
226 dev_err(ab->dev, "Failed to set optimum mode (ret=%d)\n",
230 regulator_disable(ab->v_ape);
233 static void ab8500_usb_wd_linkstatus(struct ab8500_usb *ab, u8 bit)
235 /* Workaround for v2.0 bug # 31952 */
236 if (is_ab8500_2p0(ab->ab8500)) {
237 abx500_mask_and_set_register_interruptible(ab->dev,
238 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
240 udelay(AB8500_V20_31952_DISABLE_DELAY_US);
244 static void ab8500_usb_phy_enable(struct ab8500_usb *ab, bool sel_host)
247 bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN :
248 AB8500_BIT_PHY_CTRL_DEVICE_EN;
250 /* mux and configure USB pins to DEFAULT state */
251 ab->pinctrl = pinctrl_get_select(ab->dev, PINCTRL_STATE_DEFAULT);
252 if (IS_ERR(ab->pinctrl))
253 dev_err(ab->dev, "could not get/set default pinstate\n");
255 ab8500_usb_regulator_enable(ab);
257 abx500_mask_and_set_register_interruptible(ab->dev,
258 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
262 static void ab8500_usb_phy_disable(struct ab8500_usb *ab, bool sel_host)
265 bit = sel_host ? AB8500_BIT_PHY_CTRL_HOST_EN :
266 AB8500_BIT_PHY_CTRL_DEVICE_EN;
268 ab8500_usb_wd_linkstatus(ab, bit);
270 abx500_mask_and_set_register_interruptible(ab->dev,
271 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
274 /* Needed to disable the phy.*/
275 ab8500_usb_wd_workaround(ab);
277 ab8500_usb_regulator_disable(ab);
279 if (!IS_ERR(ab->pinctrl)) {
280 /* configure USB pins to SLEEP state */
281 ab->pins_sleep = pinctrl_lookup_state(ab->pinctrl,
282 PINCTRL_STATE_SLEEP);
284 if (IS_ERR(ab->pins_sleep))
285 dev_dbg(ab->dev, "could not get sleep pinstate\n");
286 else if (pinctrl_select_state(ab->pinctrl, ab->pins_sleep))
287 dev_err(ab->dev, "could not set pins to sleep state\n");
289 /* as USB pins are shared with idddet, release them to allow
290 * iddet to request them
292 pinctrl_put(ab->pinctrl);
296 #define ab8500_usb_host_phy_en(ab) ab8500_usb_phy_enable(ab, true)
297 #define ab8500_usb_host_phy_dis(ab) ab8500_usb_phy_disable(ab, true)
298 #define ab8500_usb_peri_phy_en(ab) ab8500_usb_phy_enable(ab, false)
299 #define ab8500_usb_peri_phy_dis(ab) ab8500_usb_phy_disable(ab, false)
301 static int ab8505_usb_link_status_update(struct ab8500_usb *ab,
302 enum ab8505_usb_link_status lsts)
304 enum ux500_musb_vbus_id_status event = 0;
306 dev_dbg(ab->dev, "ab8505_usb_link_status_update %d\n", lsts);
309 * Spurious link_status interrupts are seen at the time of
310 * disconnection of a device in RIDA state
312 if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8505 &&
313 (lsts == USB_LINK_STD_HOST_NC_8505))
316 ab->previous_link_status_state = lsts;
319 case USB_LINK_ACA_RID_B_8505:
320 event = UX500_MUSB_RIDB;
321 case USB_LINK_NOT_CONFIGURED_8505:
322 case USB_LINK_RESERVED0_8505:
323 case USB_LINK_RESERVED1_8505:
324 case USB_LINK_RESERVED2_8505:
325 case USB_LINK_RESERVED3_8505:
327 ab->phy.otg->default_a = false;
329 if (event != UX500_MUSB_RIDB)
330 event = UX500_MUSB_NONE;
332 * Fallback to default B_IDLE as nothing
335 ab->phy.state = OTG_STATE_B_IDLE;
338 case USB_LINK_ACA_RID_C_NM_8505:
339 event = UX500_MUSB_RIDC;
340 case USB_LINK_STD_HOST_NC_8505:
341 case USB_LINK_STD_HOST_C_NS_8505:
342 case USB_LINK_STD_HOST_C_S_8505:
343 case USB_LINK_CDP_8505:
344 if (ab->mode == USB_IDLE) {
345 ab->mode = USB_PERIPHERAL;
346 ab8500_usb_peri_phy_en(ab);
347 atomic_notifier_call_chain(&ab->phy.notifier,
348 UX500_MUSB_PREPARE, &ab->vbus_draw);
350 if (event != UX500_MUSB_RIDC)
351 event = UX500_MUSB_VBUS;
354 case USB_LINK_ACA_RID_A_8505:
355 case USB_LINK_ACA_DOCK_CHGR_8505:
356 event = UX500_MUSB_RIDA;
357 case USB_LINK_HM_IDGND_8505:
358 if (ab->mode == USB_IDLE) {
360 ab8500_usb_host_phy_en(ab);
361 atomic_notifier_call_chain(&ab->phy.notifier,
362 UX500_MUSB_PREPARE, &ab->vbus_draw);
364 ab->phy.otg->default_a = true;
365 if (event != UX500_MUSB_RIDA)
366 event = UX500_MUSB_ID;
367 atomic_notifier_call_chain(&ab->phy.notifier,
368 event, &ab->vbus_draw);
371 case USB_LINK_DEDICATED_CHG_8505:
372 ab->mode = USB_DEDICATED_CHG;
373 event = UX500_MUSB_CHARGER;
374 atomic_notifier_call_chain(&ab->phy.notifier,
375 event, &ab->vbus_draw);
385 static int ab8500_usb_link_status_update(struct ab8500_usb *ab,
386 enum ab8500_usb_link_status lsts)
388 enum ux500_musb_vbus_id_status event = 0;
390 dev_dbg(ab->dev, "ab8500_usb_link_status_update %d\n", lsts);
393 * Spurious link_status interrupts are seen in case of a
394 * disconnection of a device in IDGND and RIDA stage
396 if (ab->previous_link_status_state == USB_LINK_HM_IDGND_8500 &&
397 (lsts == USB_LINK_STD_HOST_C_NS_8500 ||
398 lsts == USB_LINK_STD_HOST_NC_8500))
401 if (ab->previous_link_status_state == USB_LINK_ACA_RID_A_8500 &&
402 lsts == USB_LINK_STD_HOST_NC_8500)
405 ab->previous_link_status_state = lsts;
408 case USB_LINK_ACA_RID_B_8500:
409 event = UX500_MUSB_RIDB;
410 case USB_LINK_NOT_CONFIGURED_8500:
411 case USB_LINK_NOT_VALID_LINK_8500:
413 ab->phy.otg->default_a = false;
415 if (event != UX500_MUSB_RIDB)
416 event = UX500_MUSB_NONE;
417 /* Fallback to default B_IDLE as nothing is connected */
418 ab->phy.state = OTG_STATE_B_IDLE;
421 case USB_LINK_ACA_RID_C_NM_8500:
422 case USB_LINK_ACA_RID_C_HS_8500:
423 case USB_LINK_ACA_RID_C_HS_CHIRP_8500:
424 event = UX500_MUSB_RIDC;
425 case USB_LINK_STD_HOST_NC_8500:
426 case USB_LINK_STD_HOST_C_NS_8500:
427 case USB_LINK_STD_HOST_C_S_8500:
428 case USB_LINK_HOST_CHG_NM_8500:
429 case USB_LINK_HOST_CHG_HS_8500:
430 case USB_LINK_HOST_CHG_HS_CHIRP_8500:
431 if (ab->mode == USB_IDLE) {
432 ab->mode = USB_PERIPHERAL;
433 ab8500_usb_peri_phy_en(ab);
434 atomic_notifier_call_chain(&ab->phy.notifier,
435 UX500_MUSB_PREPARE, &ab->vbus_draw);
437 if (event != UX500_MUSB_RIDC)
438 event = UX500_MUSB_VBUS;
441 case USB_LINK_ACA_RID_A_8500:
442 event = UX500_MUSB_RIDA;
443 case USB_LINK_HM_IDGND_8500:
444 if (ab->mode == USB_IDLE) {
446 ab8500_usb_host_phy_en(ab);
447 atomic_notifier_call_chain(&ab->phy.notifier,
448 UX500_MUSB_PREPARE, &ab->vbus_draw);
450 ab->phy.otg->default_a = true;
451 if (event != UX500_MUSB_RIDA)
452 event = UX500_MUSB_ID;
453 atomic_notifier_call_chain(&ab->phy.notifier,
454 event, &ab->vbus_draw);
457 case USB_LINK_DEDICATED_CHG_8500:
458 ab->mode = USB_DEDICATED_CHG;
459 event = UX500_MUSB_CHARGER;
460 atomic_notifier_call_chain(&ab->phy.notifier,
461 event, &ab->vbus_draw);
464 case USB_LINK_RESERVED_8500:
472 * Connection Sequence:
473 * 1. Link Status Interrupt
475 * 3. Enable AB regulators
477 * 5. Reset the musb controller
478 * 6. Switch the ULPI GPIO pins to fucntion mode
479 * 7. Enable the musb Peripheral5 clock
480 * 8. Restore MUSB context
482 static int abx500_usb_link_status_update(struct ab8500_usb *ab)
487 if (is_ab8500(ab->ab8500)) {
488 enum ab8500_usb_link_status lsts;
490 abx500_get_register_interruptible(ab->dev,
491 AB8500_USB, AB8500_USB_LINE_STAT_REG, ®);
492 lsts = (reg >> 3) & 0x0F;
493 ret = ab8500_usb_link_status_update(ab, lsts);
494 } else if (is_ab8505(ab->ab8500)) {
495 enum ab8505_usb_link_status lsts;
497 abx500_get_register_interruptible(ab->dev,
498 AB8500_USB, AB8505_USB_LINE_STAT_REG, ®);
499 lsts = (reg >> 3) & 0x1F;
500 ret = ab8505_usb_link_status_update(ab, lsts);
507 * Disconnection Sequence:
508 * 1. Disconect Interrupt
509 * 2. Disable regulators
510 * 3. Disable AB clock
512 * 5. Link Status Interrupt
513 * 6. Disable Musb Clock
515 static irqreturn_t ab8500_usb_disconnect_irq(int irq, void *data)
517 struct ab8500_usb *ab = (struct ab8500_usb *) data;
518 enum usb_phy_events event = UX500_MUSB_NONE;
520 /* Link status will not be updated till phy is disabled. */
521 if (ab->mode == USB_HOST) {
522 ab->phy.otg->default_a = false;
524 atomic_notifier_call_chain(&ab->phy.notifier,
525 event, &ab->vbus_draw);
526 ab8500_usb_host_phy_dis(ab);
530 if (ab->mode == USB_PERIPHERAL) {
531 atomic_notifier_call_chain(&ab->phy.notifier,
532 event, &ab->vbus_draw);
533 ab8500_usb_peri_phy_dis(ab);
534 atomic_notifier_call_chain(&ab->phy.notifier,
535 UX500_MUSB_CLEAN, &ab->vbus_draw);
537 ab->phy.otg->default_a = false;
541 if (is_ab8500_2p0(ab->ab8500)) {
542 if (ab->mode == USB_DEDICATED_CHG) {
543 ab8500_usb_wd_linkstatus(ab,
544 AB8500_BIT_PHY_CTRL_DEVICE_EN);
545 abx500_mask_and_set_register_interruptible(ab->dev,
546 AB8500_USB, AB8500_USB_PHY_CTRL_REG,
547 AB8500_BIT_PHY_CTRL_DEVICE_EN, 0);
554 static irqreturn_t ab8500_usb_link_status_irq(int irq, void *data)
556 struct ab8500_usb *ab = (struct ab8500_usb *) data;
558 abx500_usb_link_status_update(ab);
563 static void ab8500_usb_phy_disable_work(struct work_struct *work)
565 struct ab8500_usb *ab = container_of(work, struct ab8500_usb,
568 if (!ab->phy.otg->host)
569 ab8500_usb_host_phy_dis(ab);
571 if (!ab->phy.otg->gadget)
572 ab8500_usb_peri_phy_dis(ab);
575 static unsigned ab8500_eyediagram_workaroud(struct ab8500_usb *ab, unsigned mA)
578 * AB8500 V2 has eye diagram issues when drawing more than 100mA from
579 * VBUS. Set charging current to 100mA in case of standard host
581 if (is_ab8500_2p0_or_earlier(ab->ab8500))
588 static int ab8500_usb_set_power(struct usb_phy *phy, unsigned mA)
590 struct ab8500_usb *ab;
597 mA = ab8500_eyediagram_workaroud(ab, mA);
601 atomic_notifier_call_chain(&ab->phy.notifier,
602 UX500_MUSB_VBUS, &ab->vbus_draw);
607 static int ab8500_usb_set_suspend(struct usb_phy *x, int suspend)
613 static int ab8500_usb_set_peripheral(struct usb_otg *otg,
614 struct usb_gadget *gadget)
616 struct ab8500_usb *ab;
621 ab = phy_to_ab(otg->phy);
623 ab->phy.otg->gadget = gadget;
625 /* Some drivers call this function in atomic context.
626 * Do not update ab8500 registers directly till this
630 if ((ab->mode != USB_IDLE) && (!gadget)) {
632 schedule_work(&ab->phy_dis_work);
638 static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
640 struct ab8500_usb *ab;
645 ab = phy_to_ab(otg->phy);
647 ab->phy.otg->host = host;
649 /* Some drivers call this function in atomic context.
650 * Do not update ab8500 registers directly till this
654 if ((ab->mode != USB_IDLE) && (!host)) {
656 schedule_work(&ab->phy_dis_work);
662 static int ab8500_usb_regulator_get(struct ab8500_usb *ab)
666 ab->v_ape = devm_regulator_get(ab->dev, "v-ape");
667 if (IS_ERR(ab->v_ape)) {
668 dev_err(ab->dev, "Could not get v-ape supply\n");
669 err = PTR_ERR(ab->v_ape);
673 ab->v_ulpi = devm_regulator_get(ab->dev, "vddulpivio18");
674 if (IS_ERR(ab->v_ulpi)) {
675 dev_err(ab->dev, "Could not get vddulpivio18 supply\n");
676 err = PTR_ERR(ab->v_ulpi);
680 ab->v_musb = devm_regulator_get(ab->dev, "musb_1v8");
681 if (IS_ERR(ab->v_musb)) {
682 dev_err(ab->dev, "Could not get musb_1v8 supply\n");
683 err = PTR_ERR(ab->v_musb);
690 static int ab8500_usb_irq_setup(struct platform_device *pdev,
691 struct ab8500_usb *ab)
696 irq = platform_get_irq_byname(pdev, "USB_LINK_STATUS");
698 dev_err(&pdev->dev, "Link status irq not found\n");
701 err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
702 ab8500_usb_link_status_irq,
703 IRQF_NO_SUSPEND | IRQF_SHARED, "usb-link-status", ab);
705 dev_err(ab->dev, "request_irq failed for link status irq\n");
709 irq = platform_get_irq_byname(pdev, "ID_WAKEUP_F");
711 dev_err(&pdev->dev, "ID fall irq not found\n");
714 err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
715 ab8500_usb_disconnect_irq,
716 IRQF_NO_SUSPEND | IRQF_SHARED, "usb-id-fall", ab);
718 dev_err(ab->dev, "request_irq failed for ID fall irq\n");
722 irq = platform_get_irq_byname(pdev, "VBUS_DET_F");
724 dev_err(&pdev->dev, "VBUS fall irq not found\n");
727 err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
728 ab8500_usb_disconnect_irq,
729 IRQF_NO_SUSPEND | IRQF_SHARED, "usb-vbus-fall", ab);
731 dev_err(ab->dev, "request_irq failed for Vbus fall irq\n");
738 static int ab8500_usb_probe(struct platform_device *pdev)
740 struct ab8500_usb *ab;
741 struct ab8500 *ab8500;
746 ab8500 = dev_get_drvdata(pdev->dev.parent);
747 rev = abx500_get_chip_id(&pdev->dev);
749 if (is_ab8500_1p1_or_earlier(ab8500)) {
750 dev_err(&pdev->dev, "Unsupported AB8500 chip rev=%d\n", rev);
754 ab = devm_kzalloc(&pdev->dev, sizeof(*ab), GFP_KERNEL);
758 otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
762 ab->dev = &pdev->dev;
764 ab->phy.dev = ab->dev;
766 ab->phy.label = "ab8500";
767 ab->phy.set_suspend = ab8500_usb_set_suspend;
768 ab->phy.set_power = ab8500_usb_set_power;
769 ab->phy.state = OTG_STATE_UNDEFINED;
772 otg->set_host = ab8500_usb_set_host;
773 otg->set_peripheral = ab8500_usb_set_peripheral;
775 platform_set_drvdata(pdev, ab);
777 ATOMIC_INIT_NOTIFIER_HEAD(&ab->phy.notifier);
779 /* all: Disable phy when called from set_host and set_peripheral */
780 INIT_WORK(&ab->phy_dis_work, ab8500_usb_phy_disable_work);
782 err = ab8500_usb_regulator_get(ab);
786 err = ab8500_usb_irq_setup(pdev, ab);
790 err = usb_add_phy(&ab->phy, USB_PHY_TYPE_USB2);
792 dev_err(&pdev->dev, "Can't register transceiver\n");
796 /* Phy tuning values for AB8500 */
797 if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
798 /* Enable the PBT/Bank 0x12 access */
799 err = abx500_set_register_interruptible(ab->dev,
800 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01);
802 dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
805 err = abx500_set_register_interruptible(ab->dev,
806 AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8);
808 dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
811 err = abx500_set_register_interruptible(ab->dev,
812 AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x00);
814 dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
817 err = abx500_set_register_interruptible(ab->dev,
818 AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x78);
820 dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
823 /* Switch to normal mode/disable Bank 0x12 access */
824 err = abx500_set_register_interruptible(ab->dev,
825 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00);
827 dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
831 /* Phy tuning values for AB8505 */
832 if (is_ab8505(ab->ab8500)) {
833 /* Enable the PBT/Bank 0x12 access */
834 err = abx500_mask_and_set_register_interruptible(ab->dev,
835 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS,
838 dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
841 err = abx500_mask_and_set_register_interruptible(ab->dev,
842 AB8500_DEBUG, AB8500_USB_PHY_TUNE1,
845 dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
848 err = abx500_mask_and_set_register_interruptible(ab->dev,
849 AB8500_DEBUG, AB8500_USB_PHY_TUNE2,
852 dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
855 err = abx500_mask_and_set_register_interruptible(ab->dev,
856 AB8500_DEBUG, AB8500_USB_PHY_TUNE3,
860 dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
863 /* Switch to normal mode/disable Bank 0x12 access */
864 err = abx500_mask_and_set_register_interruptible(ab->dev,
865 AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS,
868 dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
872 /* Needed to enable ID detection. */
873 ab8500_usb_wd_workaround(ab);
875 abx500_usb_link_status_update(ab);
877 dev_info(&pdev->dev, "revision 0x%2x driver initialized\n", rev);
882 static int ab8500_usb_remove(struct platform_device *pdev)
884 struct ab8500_usb *ab = platform_get_drvdata(pdev);
886 cancel_work_sync(&ab->phy_dis_work);
888 usb_remove_phy(&ab->phy);
890 if (ab->mode == USB_HOST)
891 ab8500_usb_host_phy_dis(ab);
892 else if (ab->mode == USB_PERIPHERAL)
893 ab8500_usb_peri_phy_dis(ab);
898 static struct platform_driver ab8500_usb_driver = {
899 .probe = ab8500_usb_probe,
900 .remove = ab8500_usb_remove,
902 .name = "ab8500-usb",
903 .owner = THIS_MODULE,
907 static int __init ab8500_usb_init(void)
909 return platform_driver_register(&ab8500_usb_driver);
911 subsys_initcall(ab8500_usb_init);
913 static void __exit ab8500_usb_exit(void)
915 platform_driver_unregister(&ab8500_usb_driver);
917 module_exit(ab8500_usb_exit);
919 MODULE_ALIAS("platform:ab8500_usb");
920 MODULE_AUTHOR("ST-Ericsson AB");
921 MODULE_DESCRIPTION("AB8500 usb transceiver driver");
922 MODULE_LICENSE("GPL");