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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Palmas USB transceiver driver
4 *
5 * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
7 * Author: Kishon Vijay Abraham I <kishon@ti.com>
8 * Based on twl6030_usb.c
9 * Author: Hema HK <hemahk@ti.com>
10 */
11
12#include <linux/devm-helpers.h>
13#include <linux/module.h>
14#include <linux/interrupt.h>
15#include <linux/platform_device.h>
16#include <linux/slab.h>
17#include <linux/err.h>
18#include <linux/mfd/palmas.h>
19#include <linux/of.h>
20#include <linux/of_platform.h>
21#include <linux/gpio/consumer.h>
22#include <linux/workqueue.h>
23
24#define USB_GPIO_DEBOUNCE_MS 20 /* ms */
25
26static const unsigned int palmas_extcon_cable[] = {
27 EXTCON_USB,
28 EXTCON_USB_HOST,
29 EXTCON_NONE,
30};
31
32static void palmas_usb_wakeup(struct palmas *palmas, int enable)
33{
34 if (enable)
35 palmas_write(palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_WAKEUP,
36 PALMAS_USB_WAKEUP_ID_WK_UP_COMP);
37 else
38 palmas_write(palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_WAKEUP, 0);
39}
40
41static irqreturn_t palmas_vbus_irq_handler(int irq, void *_palmas_usb)
42{
43 struct palmas_usb *palmas_usb = _palmas_usb;
44 struct extcon_dev *edev = palmas_usb->edev;
45 unsigned int vbus_line_state;
46
47 palmas_read(palmas_usb->palmas, PALMAS_INTERRUPT_BASE,
48 PALMAS_INT3_LINE_STATE, &vbus_line_state);
49
50 if (vbus_line_state & PALMAS_INT3_LINE_STATE_VBUS) {
51 if (palmas_usb->linkstat != PALMAS_USB_STATE_VBUS) {
52 palmas_usb->linkstat = PALMAS_USB_STATE_VBUS;
53 extcon_set_state_sync(edev, EXTCON_USB, true);
54 dev_dbg(palmas_usb->dev, "USB cable is attached\n");
55 } else {
56 dev_dbg(palmas_usb->dev,
57 "Spurious connect event detected\n");
58 }
59 } else if (!(vbus_line_state & PALMAS_INT3_LINE_STATE_VBUS)) {
60 if (palmas_usb->linkstat == PALMAS_USB_STATE_VBUS) {
61 palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT;
62 extcon_set_state_sync(edev, EXTCON_USB, false);
63 dev_dbg(palmas_usb->dev, "USB cable is detached\n");
64 } else {
65 dev_dbg(palmas_usb->dev,
66 "Spurious disconnect event detected\n");
67 }
68 }
69
70 return IRQ_HANDLED;
71}
72
73static irqreturn_t palmas_id_irq_handler(int irq, void *_palmas_usb)
74{
75 unsigned int set, id_src;
76 struct palmas_usb *palmas_usb = _palmas_usb;
77 struct extcon_dev *edev = palmas_usb->edev;
78
79 palmas_read(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
80 PALMAS_USB_ID_INT_LATCH_SET, &set);
81 palmas_read(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
82 PALMAS_USB_ID_INT_SRC, &id_src);
83
84 if ((set & PALMAS_USB_ID_INT_SRC_ID_GND) &&
85 (id_src & PALMAS_USB_ID_INT_SRC_ID_GND)) {
86 palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
87 PALMAS_USB_ID_INT_LATCH_CLR,
88 PALMAS_USB_ID_INT_EN_HI_CLR_ID_GND);
89 palmas_usb->linkstat = PALMAS_USB_STATE_ID;
90 extcon_set_state_sync(edev, EXTCON_USB_HOST, true);
91 dev_dbg(palmas_usb->dev, "USB-HOST cable is attached\n");
92 } else if ((set & PALMAS_USB_ID_INT_SRC_ID_FLOAT) &&
93 (id_src & PALMAS_USB_ID_INT_SRC_ID_FLOAT)) {
94 palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
95 PALMAS_USB_ID_INT_LATCH_CLR,
96 PALMAS_USB_ID_INT_EN_HI_CLR_ID_FLOAT);
97 palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT;
98 extcon_set_state_sync(edev, EXTCON_USB_HOST, false);
99 dev_dbg(palmas_usb->dev, "USB-HOST cable is detached\n");
100 } else if ((palmas_usb->linkstat == PALMAS_USB_STATE_ID) &&
101 (!(set & PALMAS_USB_ID_INT_SRC_ID_GND))) {
102 palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT;
103 extcon_set_state_sync(edev, EXTCON_USB_HOST, false);
104 dev_dbg(palmas_usb->dev, "USB-HOST cable is detached\n");
105 } else if ((palmas_usb->linkstat == PALMAS_USB_STATE_DISCONNECT) &&
106 (id_src & PALMAS_USB_ID_INT_SRC_ID_GND)) {
107 palmas_usb->linkstat = PALMAS_USB_STATE_ID;
108 extcon_set_state_sync(edev, EXTCON_USB_HOST, true);
109 dev_dbg(palmas_usb->dev, "USB-HOST cable is attached\n");
110 }
111
112 return IRQ_HANDLED;
113}
114
115static void palmas_gpio_id_detect(struct work_struct *work)
116{
117 int id;
118 struct palmas_usb *palmas_usb = container_of(to_delayed_work(work),
119 struct palmas_usb,
120 wq_detectid);
121 struct extcon_dev *edev = palmas_usb->edev;
122
123 if (!palmas_usb->id_gpiod)
124 return;
125
126 id = gpiod_get_value_cansleep(palmas_usb->id_gpiod);
127
128 if (id) {
129 extcon_set_state_sync(edev, EXTCON_USB_HOST, false);
130 dev_dbg(palmas_usb->dev, "USB-HOST cable is detached\n");
131 } else {
132 extcon_set_state_sync(edev, EXTCON_USB_HOST, true);
133 dev_dbg(palmas_usb->dev, "USB-HOST cable is attached\n");
134 }
135}
136
137static irqreturn_t palmas_gpio_id_irq_handler(int irq, void *_palmas_usb)
138{
139 struct palmas_usb *palmas_usb = _palmas_usb;
140
141 queue_delayed_work(system_power_efficient_wq, &palmas_usb->wq_detectid,
142 palmas_usb->sw_debounce_jiffies);
143
144 return IRQ_HANDLED;
145}
146
147static void palmas_enable_irq(struct palmas_usb *palmas_usb)
148{
149 palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
150 PALMAS_USB_VBUS_CTRL_SET,
151 PALMAS_USB_VBUS_CTRL_SET_VBUS_ACT_COMP);
152
153 if (palmas_usb->enable_id_detection) {
154 palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
155 PALMAS_USB_ID_CTRL_SET,
156 PALMAS_USB_ID_CTRL_SET_ID_ACT_COMP);
157
158 palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
159 PALMAS_USB_ID_INT_EN_HI_SET,
160 PALMAS_USB_ID_INT_EN_HI_SET_ID_GND |
161 PALMAS_USB_ID_INT_EN_HI_SET_ID_FLOAT);
162 }
163
164 if (palmas_usb->enable_vbus_detection)
165 palmas_vbus_irq_handler(palmas_usb->vbus_irq, palmas_usb);
166
167 /* cold plug for host mode needs this delay */
168 if (palmas_usb->enable_id_detection) {
169 msleep(30);
170 palmas_id_irq_handler(palmas_usb->id_irq, palmas_usb);
171 }
172}
173
174static int palmas_usb_probe(struct platform_device *pdev)
175{
176 struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
177 struct palmas_usb_platform_data *pdata = dev_get_platdata(&pdev->dev);
178 struct device_node *node = pdev->dev.of_node;
179 struct palmas_usb *palmas_usb;
180 int status;
181
182 if (!palmas) {
183 dev_err(&pdev->dev, "failed to get valid parent\n");
184 return -EINVAL;
185 }
186
187 palmas_usb = devm_kzalloc(&pdev->dev, sizeof(*palmas_usb), GFP_KERNEL);
188 if (!palmas_usb)
189 return -ENOMEM;
190
191 if (node && !pdata) {
192 palmas_usb->wakeup = of_property_read_bool(node, "ti,wakeup");
193 palmas_usb->enable_id_detection = of_property_read_bool(node,
194 "ti,enable-id-detection");
195 palmas_usb->enable_vbus_detection = of_property_read_bool(node,
196 "ti,enable-vbus-detection");
197 } else {
198 palmas_usb->wakeup = true;
199 palmas_usb->enable_id_detection = true;
200 palmas_usb->enable_vbus_detection = true;
201
202 if (pdata)
203 palmas_usb->wakeup = pdata->wakeup;
204 }
205
206 palmas_usb->id_gpiod = devm_gpiod_get_optional(&pdev->dev, "id",
207 GPIOD_IN);
208 if (IS_ERR(palmas_usb->id_gpiod))
209 return dev_err_probe(&pdev->dev, PTR_ERR(palmas_usb->id_gpiod),
210 "failed to get id gpio\n");
211
212 palmas_usb->vbus_gpiod = devm_gpiod_get_optional(&pdev->dev, "vbus",
213 GPIOD_IN);
214 if (IS_ERR(palmas_usb->vbus_gpiod))
215 return dev_err_probe(&pdev->dev, PTR_ERR(palmas_usb->vbus_gpiod),
216 "failed to get id gpio\n");
217
218 if (palmas_usb->enable_id_detection && palmas_usb->id_gpiod) {
219 palmas_usb->enable_id_detection = false;
220 palmas_usb->enable_gpio_id_detection = true;
221 }
222
223 if (palmas_usb->enable_vbus_detection && palmas_usb->vbus_gpiod) {
224 palmas_usb->enable_vbus_detection = false;
225 palmas_usb->enable_gpio_vbus_detection = true;
226 }
227
228 if (palmas_usb->enable_gpio_id_detection) {
229 u32 debounce;
230
231 if (of_property_read_u32(node, "debounce-delay-ms", &debounce))
232 debounce = USB_GPIO_DEBOUNCE_MS;
233
234 status = gpiod_set_debounce(palmas_usb->id_gpiod,
235 debounce * 1000);
236 if (status < 0)
237 palmas_usb->sw_debounce_jiffies = msecs_to_jiffies(debounce);
238 }
239
240 status = devm_delayed_work_autocancel(&pdev->dev,
241 &palmas_usb->wq_detectid,
242 palmas_gpio_id_detect);
243 if (status)
244 return status;
245
246 palmas->usb = palmas_usb;
247 palmas_usb->palmas = palmas;
248
249 palmas_usb->dev = &pdev->dev;
250
251 palmas_usb_wakeup(palmas, palmas_usb->wakeup);
252
253 platform_set_drvdata(pdev, palmas_usb);
254
255 palmas_usb->edev = devm_extcon_dev_allocate(&pdev->dev,
256 palmas_extcon_cable);
257 if (IS_ERR(palmas_usb->edev)) {
258 dev_err(&pdev->dev, "failed to allocate extcon device\n");
259 return -ENOMEM;
260 }
261
262 status = devm_extcon_dev_register(&pdev->dev, palmas_usb->edev);
263 if (status) {
264 dev_err(&pdev->dev, "failed to register extcon device\n");
265 return status;
266 }
267
268 if (palmas_usb->enable_id_detection) {
269 palmas_usb->id_otg_irq = regmap_irq_get_virq(palmas->irq_data,
270 PALMAS_ID_OTG_IRQ);
271 palmas_usb->id_irq = regmap_irq_get_virq(palmas->irq_data,
272 PALMAS_ID_IRQ);
273 status = devm_request_threaded_irq(palmas_usb->dev,
274 palmas_usb->id_irq,
275 NULL, palmas_id_irq_handler,
276 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
277 IRQF_ONESHOT,
278 "palmas_usb_id", palmas_usb);
279 if (status < 0) {
280 dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
281 palmas_usb->id_irq, status);
282 return status;
283 }
284 } else if (palmas_usb->enable_gpio_id_detection) {
285 palmas_usb->gpio_id_irq = gpiod_to_irq(palmas_usb->id_gpiod);
286 if (palmas_usb->gpio_id_irq < 0) {
287 dev_err(&pdev->dev, "failed to get id irq\n");
288 return palmas_usb->gpio_id_irq;
289 }
290 status = devm_request_threaded_irq(&pdev->dev,
291 palmas_usb->gpio_id_irq,
292 NULL,
293 palmas_gpio_id_irq_handler,
294 IRQF_TRIGGER_RISING |
295 IRQF_TRIGGER_FALLING |
296 IRQF_ONESHOT,
297 "palmas_usb_id",
298 palmas_usb);
299 if (status < 0) {
300 dev_err(&pdev->dev,
301 "failed to request handler for id irq\n");
302 return status;
303 }
304 }
305
306 if (palmas_usb->enable_vbus_detection) {
307 palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data,
308 PALMAS_VBUS_OTG_IRQ);
309 palmas_usb->vbus_irq = regmap_irq_get_virq(palmas->irq_data,
310 PALMAS_VBUS_IRQ);
311 status = devm_request_threaded_irq(palmas_usb->dev,
312 palmas_usb->vbus_irq, NULL,
313 palmas_vbus_irq_handler,
314 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
315 IRQF_ONESHOT,
316 "palmas_usb_vbus", palmas_usb);
317 if (status < 0) {
318 dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
319 palmas_usb->vbus_irq, status);
320 return status;
321 }
322 } else if (palmas_usb->enable_gpio_vbus_detection) {
323 /* remux GPIO_1 as VBUSDET */
324 status = palmas_update_bits(palmas,
325 PALMAS_PU_PD_OD_BASE,
326 PALMAS_PRIMARY_SECONDARY_PAD1,
327 PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK,
328 (1 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT));
329 if (status < 0) {
330 dev_err(&pdev->dev, "can't remux GPIO1\n");
331 return status;
332 }
333
334 palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data,
335 PALMAS_VBUS_OTG_IRQ);
336 palmas_usb->gpio_vbus_irq = gpiod_to_irq(palmas_usb->vbus_gpiod);
337 if (palmas_usb->gpio_vbus_irq < 0) {
338 dev_err(&pdev->dev, "failed to get vbus irq\n");
339 return palmas_usb->gpio_vbus_irq;
340 }
341 status = devm_request_threaded_irq(&pdev->dev,
342 palmas_usb->gpio_vbus_irq,
343 NULL,
344 palmas_vbus_irq_handler,
345 IRQF_TRIGGER_FALLING |
346 IRQF_TRIGGER_RISING |
347 IRQF_ONESHOT,
348 "palmas_usb_vbus",
349 palmas_usb);
350 if (status < 0) {
351 dev_err(&pdev->dev,
352 "failed to request handler for vbus irq\n");
353 return status;
354 }
355 }
356
357 palmas_enable_irq(palmas_usb);
358 /* perform initial detection */
359 if (palmas_usb->enable_gpio_vbus_detection)
360 palmas_vbus_irq_handler(palmas_usb->gpio_vbus_irq, palmas_usb);
361 palmas_gpio_id_detect(&palmas_usb->wq_detectid.work);
362 device_set_wakeup_capable(&pdev->dev, true);
363 return 0;
364}
365
366#ifdef CONFIG_PM_SLEEP
367static int palmas_usb_suspend(struct device *dev)
368{
369 struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
370
371 if (device_may_wakeup(dev)) {
372 if (palmas_usb->enable_vbus_detection)
373 enable_irq_wake(palmas_usb->vbus_irq);
374 if (palmas_usb->enable_gpio_vbus_detection)
375 enable_irq_wake(palmas_usb->gpio_vbus_irq);
376 if (palmas_usb->enable_id_detection)
377 enable_irq_wake(palmas_usb->id_irq);
378 if (palmas_usb->enable_gpio_id_detection)
379 enable_irq_wake(palmas_usb->gpio_id_irq);
380 }
381 return 0;
382}
383
384static int palmas_usb_resume(struct device *dev)
385{
386 struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
387
388 if (device_may_wakeup(dev)) {
389 if (palmas_usb->enable_vbus_detection)
390 disable_irq_wake(palmas_usb->vbus_irq);
391 if (palmas_usb->enable_gpio_vbus_detection)
392 disable_irq_wake(palmas_usb->gpio_vbus_irq);
393 if (palmas_usb->enable_id_detection)
394 disable_irq_wake(palmas_usb->id_irq);
395 if (palmas_usb->enable_gpio_id_detection)
396 disable_irq_wake(palmas_usb->gpio_id_irq);
397 }
398
399 /* check if GPIO states changed while suspend/resume */
400 if (palmas_usb->enable_gpio_vbus_detection)
401 palmas_vbus_irq_handler(palmas_usb->gpio_vbus_irq, palmas_usb);
402 palmas_gpio_id_detect(&palmas_usb->wq_detectid.work);
403
404 return 0;
405};
406#endif
407
408static SIMPLE_DEV_PM_OPS(palmas_pm_ops, palmas_usb_suspend, palmas_usb_resume);
409
410static const struct of_device_id of_palmas_match_tbl[] = {
411 { .compatible = "ti,palmas-usb", },
412 { .compatible = "ti,palmas-usb-vid", },
413 { .compatible = "ti,twl6035-usb", },
414 { .compatible = "ti,twl6035-usb-vid", },
415 { /* end */ }
416};
417
418static struct platform_driver palmas_usb_driver = {
419 .probe = palmas_usb_probe,
420 .driver = {
421 .name = "palmas-usb",
422 .of_match_table = of_palmas_match_tbl,
423 .pm = &palmas_pm_ops,
424 },
425};
426
427module_platform_driver(palmas_usb_driver);
428
429MODULE_ALIAS("platform:palmas-usb");
430MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
431MODULE_DESCRIPTION("Palmas USB transceiver driver");
432MODULE_LICENSE("GPL");
433MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);
1/*
2 * Palmas USB transceiver driver
3 *
4 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * Author: Graeme Gregory <gg@slimlogic.co.uk>
11 * Author: Kishon Vijay Abraham I <kishon@ti.com>
12 *
13 * Based on twl6030_usb.c
14 *
15 * Author: Hema HK <hemahk@ti.com>
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 */
22
23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/platform_device.h>
26#include <linux/err.h>
27#include <linux/mfd/palmas.h>
28#include <linux/of.h>
29#include <linux/of_platform.h>
30
31static const char *palmas_extcon_cable[] = {
32 [0] = "USB",
33 [1] = "USB-HOST",
34 NULL,
35};
36
37static const int mutually_exclusive[] = {0x3, 0x0};
38
39static void palmas_usb_wakeup(struct palmas *palmas, int enable)
40{
41 if (enable)
42 palmas_write(palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_WAKEUP,
43 PALMAS_USB_WAKEUP_ID_WK_UP_COMP);
44 else
45 palmas_write(palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_WAKEUP, 0);
46}
47
48static irqreturn_t palmas_vbus_irq_handler(int irq, void *_palmas_usb)
49{
50 struct palmas_usb *palmas_usb = _palmas_usb;
51 unsigned int vbus_line_state;
52
53 palmas_read(palmas_usb->palmas, PALMAS_INTERRUPT_BASE,
54 PALMAS_INT3_LINE_STATE, &vbus_line_state);
55
56 if (vbus_line_state & PALMAS_INT3_LINE_STATE_VBUS) {
57 if (palmas_usb->linkstat != PALMAS_USB_STATE_VBUS) {
58 palmas_usb->linkstat = PALMAS_USB_STATE_VBUS;
59 extcon_set_cable_state(&palmas_usb->edev, "USB", true);
60 dev_info(palmas_usb->dev, "USB cable is attached\n");
61 } else {
62 dev_dbg(palmas_usb->dev,
63 "Spurious connect event detected\n");
64 }
65 } else if (!(vbus_line_state & PALMAS_INT3_LINE_STATE_VBUS)) {
66 if (palmas_usb->linkstat == PALMAS_USB_STATE_VBUS) {
67 palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT;
68 extcon_set_cable_state(&palmas_usb->edev, "USB", false);
69 dev_info(palmas_usb->dev, "USB cable is detached\n");
70 } else {
71 dev_dbg(palmas_usb->dev,
72 "Spurious disconnect event detected\n");
73 }
74 }
75
76 return IRQ_HANDLED;
77}
78
79static irqreturn_t palmas_id_irq_handler(int irq, void *_palmas_usb)
80{
81 unsigned int set, id_src;
82 struct palmas_usb *palmas_usb = _palmas_usb;
83
84 palmas_read(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
85 PALMAS_USB_ID_INT_LATCH_SET, &set);
86 palmas_read(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
87 PALMAS_USB_ID_INT_SRC, &id_src);
88
89 if ((set & PALMAS_USB_ID_INT_SRC_ID_GND) &&
90 (id_src & PALMAS_USB_ID_INT_SRC_ID_GND)) {
91 palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
92 PALMAS_USB_ID_INT_LATCH_CLR,
93 PALMAS_USB_ID_INT_EN_HI_CLR_ID_GND);
94 palmas_usb->linkstat = PALMAS_USB_STATE_ID;
95 extcon_set_cable_state(&palmas_usb->edev, "USB-HOST", true);
96 dev_info(palmas_usb->dev, "USB-HOST cable is attached\n");
97 } else if ((set & PALMAS_USB_ID_INT_SRC_ID_FLOAT) &&
98 (id_src & PALMAS_USB_ID_INT_SRC_ID_FLOAT)) {
99 palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
100 PALMAS_USB_ID_INT_LATCH_CLR,
101 PALMAS_USB_ID_INT_EN_HI_CLR_ID_FLOAT);
102 palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT;
103 extcon_set_cable_state(&palmas_usb->edev, "USB-HOST", false);
104 dev_info(palmas_usb->dev, "USB-HOST cable is detached\n");
105 } else if ((palmas_usb->linkstat == PALMAS_USB_STATE_ID) &&
106 (!(set & PALMAS_USB_ID_INT_SRC_ID_GND))) {
107 palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT;
108 extcon_set_cable_state(&palmas_usb->edev, "USB-HOST", false);
109 dev_info(palmas_usb->dev, "USB-HOST cable is detached\n");
110 } else if ((palmas_usb->linkstat == PALMAS_USB_STATE_DISCONNECT) &&
111 (id_src & PALMAS_USB_ID_INT_SRC_ID_GND)) {
112 palmas_usb->linkstat = PALMAS_USB_STATE_ID;
113 extcon_set_cable_state(&palmas_usb->edev, "USB-HOST", true);
114 dev_info(palmas_usb->dev, " USB-HOST cable is attached\n");
115 }
116
117 return IRQ_HANDLED;
118}
119
120static void palmas_enable_irq(struct palmas_usb *palmas_usb)
121{
122 palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
123 PALMAS_USB_VBUS_CTRL_SET,
124 PALMAS_USB_VBUS_CTRL_SET_VBUS_ACT_COMP);
125
126 palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
127 PALMAS_USB_ID_CTRL_SET, PALMAS_USB_ID_CTRL_SET_ID_ACT_COMP);
128
129 palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
130 PALMAS_USB_ID_INT_EN_HI_SET,
131 PALMAS_USB_ID_INT_EN_HI_SET_ID_GND |
132 PALMAS_USB_ID_INT_EN_HI_SET_ID_FLOAT);
133
134 if (palmas_usb->enable_vbus_detection)
135 palmas_vbus_irq_handler(palmas_usb->vbus_irq, palmas_usb);
136
137 /* cold plug for host mode needs this delay */
138 if (palmas_usb->enable_id_detection) {
139 msleep(30);
140 palmas_id_irq_handler(palmas_usb->id_irq, palmas_usb);
141 }
142}
143
144static int palmas_usb_probe(struct platform_device *pdev)
145{
146 struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
147 struct palmas_usb_platform_data *pdata = dev_get_platdata(&pdev->dev);
148 struct device_node *node = pdev->dev.of_node;
149 struct palmas_usb *palmas_usb;
150 int status;
151
152 palmas_usb = devm_kzalloc(&pdev->dev, sizeof(*palmas_usb), GFP_KERNEL);
153 if (!palmas_usb)
154 return -ENOMEM;
155
156 if (node && !pdata) {
157 palmas_usb->wakeup = of_property_read_bool(node, "ti,wakeup");
158 palmas_usb->enable_id_detection = of_property_read_bool(node,
159 "ti,enable-id-detection");
160 palmas_usb->enable_vbus_detection = of_property_read_bool(node,
161 "ti,enable-vbus-detection");
162 } else {
163 palmas_usb->wakeup = true;
164 palmas_usb->enable_id_detection = true;
165 palmas_usb->enable_vbus_detection = true;
166
167 if (pdata)
168 palmas_usb->wakeup = pdata->wakeup;
169 }
170
171 palmas->usb = palmas_usb;
172 palmas_usb->palmas = palmas;
173
174 palmas_usb->dev = &pdev->dev;
175
176 palmas_usb->id_otg_irq = regmap_irq_get_virq(palmas->irq_data,
177 PALMAS_ID_OTG_IRQ);
178 palmas_usb->id_irq = regmap_irq_get_virq(palmas->irq_data,
179 PALMAS_ID_IRQ);
180 palmas_usb->vbus_otg_irq = regmap_irq_get_virq(palmas->irq_data,
181 PALMAS_VBUS_OTG_IRQ);
182 palmas_usb->vbus_irq = regmap_irq_get_virq(palmas->irq_data,
183 PALMAS_VBUS_IRQ);
184
185 palmas_usb_wakeup(palmas, palmas_usb->wakeup);
186
187 platform_set_drvdata(pdev, palmas_usb);
188
189 palmas_usb->edev.supported_cable = palmas_extcon_cable;
190 palmas_usb->edev.dev.parent = palmas_usb->dev;
191 palmas_usb->edev.mutually_exclusive = mutually_exclusive;
192
193 status = extcon_dev_register(&palmas_usb->edev);
194 if (status) {
195 dev_err(&pdev->dev, "failed to register extcon device\n");
196 return status;
197 }
198
199 if (palmas_usb->enable_id_detection) {
200 status = devm_request_threaded_irq(palmas_usb->dev,
201 palmas_usb->id_irq,
202 NULL, palmas_id_irq_handler,
203 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
204 IRQF_ONESHOT | IRQF_EARLY_RESUME,
205 "palmas_usb_id", palmas_usb);
206 if (status < 0) {
207 dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
208 palmas_usb->id_irq, status);
209 goto fail_extcon;
210 }
211 }
212
213 if (palmas_usb->enable_vbus_detection) {
214 status = devm_request_threaded_irq(palmas_usb->dev,
215 palmas_usb->vbus_irq, NULL,
216 palmas_vbus_irq_handler,
217 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
218 IRQF_ONESHOT | IRQF_EARLY_RESUME,
219 "palmas_usb_vbus", palmas_usb);
220 if (status < 0) {
221 dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
222 palmas_usb->vbus_irq, status);
223 goto fail_extcon;
224 }
225 }
226
227 palmas_enable_irq(palmas_usb);
228 device_set_wakeup_capable(&pdev->dev, true);
229 return 0;
230
231fail_extcon:
232 extcon_dev_unregister(&palmas_usb->edev);
233
234 return status;
235}
236
237static int palmas_usb_remove(struct platform_device *pdev)
238{
239 struct palmas_usb *palmas_usb = platform_get_drvdata(pdev);
240
241 extcon_dev_unregister(&palmas_usb->edev);
242
243 return 0;
244}
245
246#ifdef CONFIG_PM_SLEEP
247static int palmas_usb_suspend(struct device *dev)
248{
249 struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
250
251 if (device_may_wakeup(dev)) {
252 if (palmas_usb->enable_vbus_detection)
253 enable_irq_wake(palmas_usb->vbus_irq);
254 if (palmas_usb->enable_id_detection)
255 enable_irq_wake(palmas_usb->id_irq);
256 }
257 return 0;
258}
259
260static int palmas_usb_resume(struct device *dev)
261{
262 struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
263
264 if (device_may_wakeup(dev)) {
265 if (palmas_usb->enable_vbus_detection)
266 disable_irq_wake(palmas_usb->vbus_irq);
267 if (palmas_usb->enable_id_detection)
268 disable_irq_wake(palmas_usb->id_irq);
269 }
270 return 0;
271};
272#endif
273
274static SIMPLE_DEV_PM_OPS(palmas_pm_ops, palmas_usb_suspend, palmas_usb_resume);
275
276static struct of_device_id of_palmas_match_tbl[] = {
277 { .compatible = "ti,palmas-usb", },
278 { .compatible = "ti,palmas-usb-vid", },
279 { .compatible = "ti,twl6035-usb", },
280 { .compatible = "ti,twl6035-usb-vid", },
281 { /* end */ }
282};
283
284static struct platform_driver palmas_usb_driver = {
285 .probe = palmas_usb_probe,
286 .remove = palmas_usb_remove,
287 .driver = {
288 .name = "palmas-usb",
289 .of_match_table = of_palmas_match_tbl,
290 .owner = THIS_MODULE,
291 .pm = &palmas_pm_ops,
292 },
293};
294
295module_platform_driver(palmas_usb_driver);
296
297MODULE_ALIAS("platform:palmas-usb");
298MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
299MODULE_DESCRIPTION("Palmas USB transceiver driver");
300MODULE_LICENSE("GPL");
301MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);