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6d6ce40f TL |
1 | /* |
2 | * Motorola CPCAP PMIC USB PHY driver | |
3 | * Copyright (C) 2017 Tony Lindgren <tony@atomide.com> | |
4 | * | |
5 | * Some parts based on earlier Motorola Linux kernel tree code in | |
6 | * board-mapphone-usb.c and cpcap-usb-det.c: | |
7 | * Copyright (C) 2007 - 2011 Motorola, Inc. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation version 2. | |
12 | * | |
13 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
14 | * kind, whether express or implied; without even the implied warranty | |
15 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | */ | |
18 | ||
19 | #include <linux/atomic.h> | |
20 | #include <linux/clk.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/err.h> | |
23 | #include <linux/io.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/of.h> | |
26 | #include <linux/of_platform.h> | |
27 | #include <linux/iio/consumer.h> | |
28 | #include <linux/pinctrl/consumer.h> | |
29 | #include <linux/platform_device.h> | |
30 | #include <linux/regmap.h> | |
31 | #include <linux/slab.h> | |
32 | ||
33 | #include <linux/gpio/consumer.h> | |
34 | #include <linux/mfd/motorola-cpcap.h> | |
35 | #include <linux/phy/omap_usb.h> | |
36 | #include <linux/phy/phy.h> | |
37 | #include <linux/regulator/consumer.h> | |
38 | #include <linux/usb/musb.h> | |
39 | ||
40 | /* CPCAP_REG_USBC1 register bits */ | |
41 | #define CPCAP_BIT_IDPULSE BIT(15) | |
42 | #define CPCAP_BIT_ID100KPU BIT(14) | |
43 | #define CPCAP_BIT_IDPUCNTRL BIT(13) | |
44 | #define CPCAP_BIT_IDPU BIT(12) | |
45 | #define CPCAP_BIT_IDPD BIT(11) | |
46 | #define CPCAP_BIT_VBUSCHRGTMR3 BIT(10) | |
47 | #define CPCAP_BIT_VBUSCHRGTMR2 BIT(9) | |
48 | #define CPCAP_BIT_VBUSCHRGTMR1 BIT(8) | |
49 | #define CPCAP_BIT_VBUSCHRGTMR0 BIT(7) | |
50 | #define CPCAP_BIT_VBUSPU BIT(6) | |
51 | #define CPCAP_BIT_VBUSPD BIT(5) | |
52 | #define CPCAP_BIT_DMPD BIT(4) | |
53 | #define CPCAP_BIT_DPPD BIT(3) | |
54 | #define CPCAP_BIT_DM1K5PU BIT(2) | |
55 | #define CPCAP_BIT_DP1K5PU BIT(1) | |
56 | #define CPCAP_BIT_DP150KPU BIT(0) | |
57 | ||
58 | /* CPCAP_REG_USBC2 register bits */ | |
59 | #define CPCAP_BIT_ZHSDRV1 BIT(15) | |
60 | #define CPCAP_BIT_ZHSDRV0 BIT(14) | |
61 | #define CPCAP_BIT_DPLLCLKREQ BIT(13) | |
62 | #define CPCAP_BIT_SE0CONN BIT(12) | |
63 | #define CPCAP_BIT_UARTTXTRI BIT(11) | |
64 | #define CPCAP_BIT_UARTSWAP BIT(10) | |
65 | #define CPCAP_BIT_UARTMUX1 BIT(9) | |
66 | #define CPCAP_BIT_UARTMUX0 BIT(8) | |
67 | #define CPCAP_BIT_ULPISTPLOW BIT(7) | |
68 | #define CPCAP_BIT_TXENPOL BIT(6) | |
69 | #define CPCAP_BIT_USBXCVREN BIT(5) | |
70 | #define CPCAP_BIT_USBCNTRL BIT(4) | |
71 | #define CPCAP_BIT_USBSUSPEND BIT(3) | |
72 | #define CPCAP_BIT_EMUMODE2 BIT(2) | |
73 | #define CPCAP_BIT_EMUMODE1 BIT(1) | |
74 | #define CPCAP_BIT_EMUMODE0 BIT(0) | |
75 | ||
76 | /* CPCAP_REG_USBC3 register bits */ | |
77 | #define CPCAP_BIT_SPARE_898_15 BIT(15) | |
78 | #define CPCAP_BIT_IHSTX03 BIT(14) | |
79 | #define CPCAP_BIT_IHSTX02 BIT(13) | |
80 | #define CPCAP_BIT_IHSTX01 BIT(12) | |
81 | #define CPCAP_BIT_IHSTX0 BIT(11) | |
82 | #define CPCAP_BIT_IDPU_SPI BIT(10) | |
83 | #define CPCAP_BIT_UNUSED_898_9 BIT(9) | |
84 | #define CPCAP_BIT_VBUSSTBY_EN BIT(8) | |
85 | #define CPCAP_BIT_VBUSEN_SPI BIT(7) | |
86 | #define CPCAP_BIT_VBUSPU_SPI BIT(6) | |
87 | #define CPCAP_BIT_VBUSPD_SPI BIT(5) | |
88 | #define CPCAP_BIT_DMPD_SPI BIT(4) | |
89 | #define CPCAP_BIT_DPPD_SPI BIT(3) | |
90 | #define CPCAP_BIT_SUSPEND_SPI BIT(2) | |
91 | #define CPCAP_BIT_PU_SPI BIT(1) | |
92 | #define CPCAP_BIT_ULPI_SPI_SEL BIT(0) | |
93 | ||
94 | struct cpcap_usb_ints_state { | |
95 | bool id_ground; | |
96 | bool id_float; | |
97 | bool chrg_det; | |
98 | bool rvrs_chrg; | |
99 | bool vbusov; | |
100 | ||
101 | bool chrg_se1b; | |
102 | bool se0conn; | |
103 | bool rvrs_mode; | |
104 | bool chrgcurr1; | |
105 | bool vbusvld; | |
106 | bool sessvld; | |
107 | bool sessend; | |
108 | bool se1; | |
109 | ||
110 | bool battdetb; | |
111 | bool dm; | |
112 | bool dp; | |
113 | }; | |
114 | ||
115 | enum cpcap_gpio_mode { | |
116 | CPCAP_DM_DP, | |
117 | CPCAP_MDM_RX_TX, | |
118 | CPCAP_UNKNOWN, | |
119 | CPCAP_OTG_DM_DP, | |
120 | }; | |
121 | ||
122 | struct cpcap_phy_ddata { | |
123 | struct regmap *reg; | |
124 | struct device *dev; | |
125 | struct clk *refclk; | |
126 | struct usb_phy phy; | |
127 | struct delayed_work detect_work; | |
128 | struct pinctrl *pins; | |
129 | struct pinctrl_state *pins_ulpi; | |
130 | struct pinctrl_state *pins_utmi; | |
131 | struct pinctrl_state *pins_uart; | |
132 | struct gpio_desc *gpio[2]; | |
133 | struct iio_channel *vbus; | |
134 | struct iio_channel *id; | |
135 | struct regulator *vusb; | |
136 | atomic_t active; | |
137 | }; | |
138 | ||
139 | static bool cpcap_usb_vbus_valid(struct cpcap_phy_ddata *ddata) | |
140 | { | |
141 | int error, value = 0; | |
142 | ||
143 | error = iio_read_channel_processed(ddata->vbus, &value); | |
144 | if (error >= 0) | |
145 | return value > 3900 ? true : false; | |
146 | ||
147 | dev_err(ddata->dev, "error reading VBUS: %i\n", error); | |
148 | ||
149 | return false; | |
150 | } | |
151 | ||
152 | static int cpcap_usb_phy_set_host(struct usb_otg *otg, struct usb_bus *host) | |
153 | { | |
154 | otg->host = host; | |
155 | if (!host) | |
156 | otg->state = OTG_STATE_UNDEFINED; | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | static int cpcap_usb_phy_set_peripheral(struct usb_otg *otg, | |
162 | struct usb_gadget *gadget) | |
163 | { | |
164 | otg->gadget = gadget; | |
165 | if (!gadget) | |
166 | otg->state = OTG_STATE_UNDEFINED; | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static const struct phy_ops ops = { | |
172 | .owner = THIS_MODULE, | |
173 | }; | |
174 | ||
175 | static int cpcap_phy_get_ints_state(struct cpcap_phy_ddata *ddata, | |
176 | struct cpcap_usb_ints_state *s) | |
177 | { | |
178 | int val, error; | |
179 | ||
180 | error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val); | |
181 | if (error) | |
182 | return error; | |
183 | ||
184 | s->id_ground = val & BIT(15); | |
185 | s->id_float = val & BIT(14); | |
186 | s->vbusov = val & BIT(11); | |
187 | ||
188 | error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val); | |
189 | if (error) | |
190 | return error; | |
191 | ||
192 | s->vbusvld = val & BIT(3); | |
193 | s->sessvld = val & BIT(2); | |
194 | s->sessend = val & BIT(1); | |
195 | s->se1 = val & BIT(0); | |
196 | ||
197 | error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val); | |
198 | if (error) | |
199 | return error; | |
200 | ||
201 | s->dm = val & BIT(1); | |
202 | s->dp = val & BIT(0); | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | static int cpcap_usb_set_uart_mode(struct cpcap_phy_ddata *ddata); | |
208 | static int cpcap_usb_set_usb_mode(struct cpcap_phy_ddata *ddata); | |
209 | ||
210 | static void cpcap_usb_detect(struct work_struct *work) | |
211 | { | |
212 | struct cpcap_phy_ddata *ddata; | |
213 | struct cpcap_usb_ints_state s; | |
214 | bool vbus = false; | |
215 | int error; | |
216 | ||
217 | ddata = container_of(work, struct cpcap_phy_ddata, detect_work.work); | |
218 | ||
219 | error = cpcap_phy_get_ints_state(ddata, &s); | |
220 | if (error) | |
221 | return; | |
222 | ||
223 | if (s.id_ground) { | |
224 | dev_dbg(ddata->dev, "id ground, USB host mode\n"); | |
225 | error = cpcap_usb_set_usb_mode(ddata); | |
226 | if (error) | |
227 | goto out_err; | |
228 | ||
229 | error = musb_mailbox(MUSB_ID_GROUND); | |
230 | if (error) | |
231 | goto out_err; | |
232 | ||
233 | error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, | |
234 | CPCAP_BIT_VBUSSTBY_EN, | |
235 | CPCAP_BIT_VBUSSTBY_EN); | |
236 | if (error) | |
237 | goto out_err; | |
238 | ||
239 | return; | |
240 | } | |
241 | ||
242 | error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, | |
243 | CPCAP_BIT_VBUSSTBY_EN, 0); | |
244 | if (error) | |
245 | goto out_err; | |
246 | ||
247 | vbus = cpcap_usb_vbus_valid(ddata); | |
248 | ||
249 | if (vbus) { | |
250 | /* Are we connected to a docking station with vbus? */ | |
251 | if (s.id_ground) { | |
252 | dev_dbg(ddata->dev, "connected to a dock\n"); | |
253 | ||
254 | /* No VBUS needed with docks */ | |
255 | error = cpcap_usb_set_usb_mode(ddata); | |
256 | if (error) | |
257 | goto out_err; | |
258 | error = musb_mailbox(MUSB_ID_GROUND); | |
259 | if (error) | |
260 | goto out_err; | |
261 | ||
262 | return; | |
263 | } | |
264 | ||
265 | /* Otherwise assume we're connected to a USB host */ | |
266 | dev_dbg(ddata->dev, "connected to USB host\n"); | |
267 | error = cpcap_usb_set_usb_mode(ddata); | |
268 | if (error) | |
269 | goto out_err; | |
270 | error = musb_mailbox(MUSB_VBUS_VALID); | |
271 | if (error) | |
272 | goto out_err; | |
273 | ||
274 | return; | |
275 | } | |
276 | ||
277 | /* Default to debug UART mode */ | |
278 | error = cpcap_usb_set_uart_mode(ddata); | |
279 | if (error) | |
280 | goto out_err; | |
281 | ||
282 | error = musb_mailbox(MUSB_VBUS_OFF); | |
283 | if (error) | |
284 | goto out_err; | |
285 | ||
286 | dev_dbg(ddata->dev, "set UART mode\n"); | |
287 | ||
288 | return; | |
289 | ||
290 | out_err: | |
291 | dev_err(ddata->dev, "error setting cable state: %i\n", error); | |
292 | } | |
293 | ||
294 | static irqreturn_t cpcap_phy_irq_thread(int irq, void *data) | |
295 | { | |
296 | struct cpcap_phy_ddata *ddata = data; | |
297 | ||
298 | if (!atomic_read(&ddata->active)) | |
299 | return IRQ_NONE; | |
300 | ||
301 | schedule_delayed_work(&ddata->detect_work, msecs_to_jiffies(1)); | |
302 | ||
303 | return IRQ_HANDLED; | |
304 | } | |
305 | ||
306 | static int cpcap_usb_init_irq(struct platform_device *pdev, | |
307 | struct cpcap_phy_ddata *ddata, | |
308 | const char *name) | |
309 | { | |
310 | int irq, error; | |
311 | ||
312 | irq = platform_get_irq_byname(pdev, name); | |
313 | if (!irq) | |
314 | return -ENODEV; | |
315 | ||
316 | error = devm_request_threaded_irq(ddata->dev, irq, NULL, | |
317 | cpcap_phy_irq_thread, | |
318 | IRQF_SHARED, | |
319 | name, ddata); | |
320 | if (error) { | |
321 | dev_err(ddata->dev, "could not get irq %s: %i\n", | |
322 | name, error); | |
323 | ||
324 | return error; | |
325 | } | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
330 | static const char * const cpcap_phy_irqs[] = { | |
331 | /* REG_INT_0 */ | |
332 | "id_ground", "id_float", | |
333 | ||
334 | /* REG_INT1 */ | |
335 | "se0conn", "vbusvld", "sessvld", "sessend", "se1", | |
336 | ||
337 | /* REG_INT_3 */ | |
338 | "dm", "dp", | |
339 | }; | |
340 | ||
341 | static int cpcap_usb_init_interrupts(struct platform_device *pdev, | |
342 | struct cpcap_phy_ddata *ddata) | |
343 | { | |
344 | int i, error; | |
345 | ||
346 | for (i = 0; i < ARRAY_SIZE(cpcap_phy_irqs); i++) { | |
347 | error = cpcap_usb_init_irq(pdev, ddata, cpcap_phy_irqs[i]); | |
348 | if (error) | |
349 | return error; | |
350 | } | |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
355 | /* | |
356 | * Optional pins and modes. At least Motorola mapphone devices | |
357 | * are using two GPIOs and dynamic pinctrl to multiplex PHY pins | |
358 | * to UART, ULPI or UTMI mode. | |
359 | */ | |
360 | ||
361 | static int cpcap_usb_gpio_set_mode(struct cpcap_phy_ddata *ddata, | |
362 | enum cpcap_gpio_mode mode) | |
363 | { | |
364 | if (!ddata->gpio[0] || !ddata->gpio[1]) | |
365 | return 0; | |
366 | ||
367 | gpiod_set_value(ddata->gpio[0], mode & 1); | |
368 | gpiod_set_value(ddata->gpio[1], mode >> 1); | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
373 | static int cpcap_usb_set_uart_mode(struct cpcap_phy_ddata *ddata) | |
374 | { | |
375 | int error; | |
376 | ||
377 | error = cpcap_usb_gpio_set_mode(ddata, CPCAP_DM_DP); | |
378 | if (error) | |
379 | goto out_err; | |
380 | ||
381 | if (ddata->pins_uart) { | |
382 | error = pinctrl_select_state(ddata->pins, ddata->pins_uart); | |
383 | if (error) | |
384 | goto out_err; | |
385 | } | |
386 | ||
387 | error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC1, | |
388 | CPCAP_BIT_VBUSPD, | |
389 | CPCAP_BIT_VBUSPD); | |
390 | if (error) | |
391 | goto out_err; | |
392 | ||
393 | error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2, | |
394 | 0xffff, CPCAP_BIT_UARTMUX0 | | |
395 | CPCAP_BIT_EMUMODE0); | |
396 | if (error) | |
397 | goto out_err; | |
398 | ||
399 | error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, 0x7fff, | |
400 | CPCAP_BIT_IDPU_SPI); | |
401 | if (error) | |
402 | goto out_err; | |
403 | ||
404 | return 0; | |
405 | ||
406 | out_err: | |
407 | dev_err(ddata->dev, "%s failed with %i\n", __func__, error); | |
408 | ||
409 | return error; | |
410 | } | |
411 | ||
412 | static int cpcap_usb_set_usb_mode(struct cpcap_phy_ddata *ddata) | |
413 | { | |
414 | int error; | |
415 | ||
416 | error = cpcap_usb_gpio_set_mode(ddata, CPCAP_OTG_DM_DP); | |
417 | if (error) | |
418 | return error; | |
419 | ||
420 | if (ddata->pins_utmi) { | |
421 | error = pinctrl_select_state(ddata->pins, ddata->pins_utmi); | |
422 | if (error) { | |
423 | dev_err(ddata->dev, "could not set usb mode: %i\n", | |
424 | error); | |
425 | ||
426 | return error; | |
427 | } | |
428 | } | |
429 | ||
430 | error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC1, | |
431 | CPCAP_BIT_VBUSPD, 0); | |
432 | if (error) | |
433 | goto out_err; | |
434 | ||
435 | error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2, | |
436 | CPCAP_BIT_USBXCVREN, | |
437 | CPCAP_BIT_USBXCVREN); | |
438 | if (error) | |
439 | goto out_err; | |
440 | ||
441 | error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC3, | |
442 | CPCAP_BIT_PU_SPI | | |
443 | CPCAP_BIT_DMPD_SPI | | |
444 | CPCAP_BIT_DPPD_SPI | | |
445 | CPCAP_BIT_SUSPEND_SPI | | |
446 | CPCAP_BIT_ULPI_SPI_SEL, 0); | |
447 | if (error) | |
448 | goto out_err; | |
449 | ||
450 | error = regmap_update_bits(ddata->reg, CPCAP_REG_USBC2, | |
451 | CPCAP_BIT_USBXCVREN, | |
452 | CPCAP_BIT_USBXCVREN); | |
453 | if (error) | |
454 | goto out_err; | |
455 | ||
456 | return 0; | |
457 | ||
458 | out_err: | |
459 | dev_err(ddata->dev, "%s failed with %i\n", __func__, error); | |
460 | ||
461 | return error; | |
462 | } | |
463 | ||
464 | static int cpcap_usb_init_optional_pins(struct cpcap_phy_ddata *ddata) | |
465 | { | |
466 | ddata->pins = devm_pinctrl_get(ddata->dev); | |
467 | if (IS_ERR(ddata->pins)) { | |
468 | dev_info(ddata->dev, "default pins not configured: %ld\n", | |
469 | PTR_ERR(ddata->pins)); | |
470 | ddata->pins = NULL; | |
471 | } | |
472 | ||
473 | ddata->pins_ulpi = pinctrl_lookup_state(ddata->pins, "ulpi"); | |
474 | if (IS_ERR(ddata->pins_ulpi)) { | |
475 | dev_info(ddata->dev, "ulpi pins not configured\n"); | |
476 | ddata->pins_ulpi = NULL; | |
477 | } | |
478 | ||
479 | ddata->pins_utmi = pinctrl_lookup_state(ddata->pins, "utmi"); | |
480 | if (IS_ERR(ddata->pins_utmi)) { | |
481 | dev_info(ddata->dev, "utmi pins not configured\n"); | |
482 | ddata->pins_utmi = NULL; | |
483 | } | |
484 | ||
485 | ddata->pins_uart = pinctrl_lookup_state(ddata->pins, "uart"); | |
486 | if (IS_ERR(ddata->pins_uart)) { | |
487 | dev_info(ddata->dev, "uart pins not configured\n"); | |
488 | ddata->pins_uart = NULL; | |
489 | } | |
490 | ||
491 | if (ddata->pins_uart) | |
492 | return pinctrl_select_state(ddata->pins, ddata->pins_uart); | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
497 | static void cpcap_usb_init_optional_gpios(struct cpcap_phy_ddata *ddata) | |
498 | { | |
499 | int i; | |
500 | ||
501 | for (i = 0; i < 2; i++) { | |
502 | ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode", | |
503 | i, GPIOD_OUT_HIGH); | |
504 | if (IS_ERR(ddata->gpio[i])) { | |
505 | dev_info(ddata->dev, "no mode change GPIO%i: %li\n", | |
506 | i, PTR_ERR(ddata->gpio[i])); | |
507 | ddata->gpio[i] = NULL; | |
508 | } | |
509 | } | |
510 | } | |
511 | ||
512 | static int cpcap_usb_init_iio(struct cpcap_phy_ddata *ddata) | |
513 | { | |
514 | enum iio_chan_type type; | |
515 | int error; | |
516 | ||
517 | ddata->vbus = devm_iio_channel_get(ddata->dev, "vbus"); | |
518 | if (IS_ERR(ddata->vbus)) { | |
519 | error = PTR_ERR(ddata->vbus); | |
520 | goto out_err; | |
521 | } | |
522 | ||
523 | if (!ddata->vbus->indio_dev) { | |
524 | error = -ENXIO; | |
525 | goto out_err; | |
526 | } | |
527 | ||
528 | error = iio_get_channel_type(ddata->vbus, &type); | |
529 | if (error < 0) | |
530 | goto out_err; | |
531 | ||
532 | if (type != IIO_VOLTAGE) { | |
533 | error = -EINVAL; | |
534 | goto out_err; | |
535 | } | |
536 | ||
537 | return 0; | |
538 | ||
539 | out_err: | |
540 | dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n", | |
541 | error); | |
542 | ||
543 | return error; | |
544 | } | |
545 | ||
546 | #ifdef CONFIG_OF | |
547 | static const struct of_device_id cpcap_usb_phy_id_table[] = { | |
548 | { | |
549 | .compatible = "motorola,cpcap-usb-phy", | |
550 | }, | |
551 | { | |
552 | .compatible = "motorola,mapphone-cpcap-usb-phy", | |
553 | }, | |
554 | {}, | |
555 | }; | |
556 | MODULE_DEVICE_TABLE(of, cpcap_usb_phy_id_table); | |
557 | #endif | |
558 | ||
559 | static int cpcap_usb_phy_probe(struct platform_device *pdev) | |
560 | { | |
561 | struct cpcap_phy_ddata *ddata; | |
562 | struct phy *generic_phy; | |
563 | struct phy_provider *phy_provider; | |
564 | struct usb_otg *otg; | |
565 | const struct of_device_id *of_id; | |
566 | int error; | |
567 | ||
568 | of_id = of_match_device(of_match_ptr(cpcap_usb_phy_id_table), | |
569 | &pdev->dev); | |
570 | if (!of_id) | |
571 | return -EINVAL; | |
572 | ||
573 | ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); | |
574 | if (!ddata) | |
575 | return -ENOMEM; | |
576 | ||
577 | ddata->reg = dev_get_regmap(pdev->dev.parent, NULL); | |
578 | if (!ddata->reg) | |
579 | return -ENODEV; | |
580 | ||
581 | otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); | |
582 | if (!otg) | |
583 | return -ENOMEM; | |
584 | ||
585 | ddata->dev = &pdev->dev; | |
586 | ddata->phy.dev = ddata->dev; | |
587 | ddata->phy.label = "cpcap_usb_phy"; | |
588 | ddata->phy.otg = otg; | |
589 | ddata->phy.type = USB_PHY_TYPE_USB2; | |
590 | otg->set_host = cpcap_usb_phy_set_host; | |
591 | otg->set_peripheral = cpcap_usb_phy_set_peripheral; | |
592 | otg->usb_phy = &ddata->phy; | |
593 | INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect); | |
594 | platform_set_drvdata(pdev, ddata); | |
595 | ||
596 | ddata->vusb = devm_regulator_get(&pdev->dev, "vusb"); | |
597 | if (IS_ERR(ddata->vusb)) | |
598 | return PTR_ERR(ddata->vusb); | |
599 | ||
600 | error = regulator_enable(ddata->vusb); | |
601 | if (error) | |
602 | return error; | |
603 | ||
604 | generic_phy = devm_phy_create(ddata->dev, NULL, &ops); | |
605 | if (IS_ERR(generic_phy)) { | |
606 | error = PTR_ERR(generic_phy); | |
607 | return PTR_ERR(generic_phy); | |
608 | } | |
609 | ||
610 | phy_set_drvdata(generic_phy, ddata); | |
611 | ||
612 | phy_provider = devm_of_phy_provider_register(ddata->dev, | |
613 | of_phy_simple_xlate); | |
614 | if (IS_ERR(phy_provider)) | |
615 | return PTR_ERR(phy_provider); | |
616 | ||
617 | error = cpcap_usb_init_optional_pins(ddata); | |
618 | if (error) | |
619 | return error; | |
620 | ||
621 | cpcap_usb_init_optional_gpios(ddata); | |
622 | ||
623 | error = cpcap_usb_init_iio(ddata); | |
624 | if (error) | |
625 | return error; | |
626 | ||
627 | error = cpcap_usb_init_interrupts(pdev, ddata); | |
628 | if (error) | |
629 | return error; | |
630 | ||
631 | usb_add_phy_dev(&ddata->phy); | |
632 | atomic_set(&ddata->active, 1); | |
633 | schedule_delayed_work(&ddata->detect_work, msecs_to_jiffies(1)); | |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
638 | static int cpcap_usb_phy_remove(struct platform_device *pdev) | |
639 | { | |
640 | struct cpcap_phy_ddata *ddata = platform_get_drvdata(pdev); | |
641 | int error; | |
642 | ||
643 | atomic_set(&ddata->active, 0); | |
644 | error = cpcap_usb_set_uart_mode(ddata); | |
645 | if (error) | |
646 | dev_err(ddata->dev, "could not set UART mode\n"); | |
647 | ||
648 | error = musb_mailbox(MUSB_VBUS_OFF); | |
649 | if (error) | |
650 | dev_err(ddata->dev, "could not set mailbox\n"); | |
651 | ||
652 | usb_remove_phy(&ddata->phy); | |
653 | cancel_delayed_work_sync(&ddata->detect_work); | |
654 | clk_unprepare(ddata->refclk); | |
655 | regulator_disable(ddata->vusb); | |
656 | ||
657 | return 0; | |
658 | } | |
659 | ||
660 | static struct platform_driver cpcap_usb_phy_driver = { | |
661 | .probe = cpcap_usb_phy_probe, | |
662 | .remove = cpcap_usb_phy_remove, | |
663 | .driver = { | |
664 | .name = "cpcap-usb-phy", | |
665 | .of_match_table = of_match_ptr(cpcap_usb_phy_id_table), | |
666 | }, | |
667 | }; | |
668 | ||
669 | module_platform_driver(cpcap_usb_phy_driver); | |
670 | ||
671 | MODULE_ALIAS("platform:cpcap_usb"); | |
672 | MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); | |
673 | MODULE_DESCRIPTION("CPCAP usb phy driver"); | |
674 | MODULE_LICENSE("GPL v2"); |