Commit | Line | Data |
---|---|---|
ec46475f HK |
1 | /* |
2 | * ISP1704 USB Charger Detection driver | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
f07c11ea | 5 | * Copyright (C) 2012 - 2013 Pali Rohár <pali.rohar@gmail.com> |
ec46475f HK |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/err.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/device.h> | |
28 | #include <linux/sysfs.h> | |
29 | #include <linux/platform_device.h> | |
30 | #include <linux/power_supply.h> | |
31 | #include <linux/delay.h> | |
34a10961 SR |
32 | #include <linux/of.h> |
33 | #include <linux/of_gpio.h> | |
ec46475f HK |
34 | |
35 | #include <linux/usb/otg.h> | |
36 | #include <linux/usb/ulpi.h> | |
37 | #include <linux/usb/ch9.h> | |
38 | #include <linux/usb/gadget.h> | |
2785cefc | 39 | #include <linux/power/isp1704_charger.h> |
ec46475f HK |
40 | |
41 | /* Vendor specific Power Control register */ | |
42 | #define ISP1704_PWR_CTRL 0x3d | |
43 | #define ISP1704_PWR_CTRL_SWCTRL (1 << 0) | |
44 | #define ISP1704_PWR_CTRL_DET_COMP (1 << 1) | |
45 | #define ISP1704_PWR_CTRL_BVALID_RISE (1 << 2) | |
46 | #define ISP1704_PWR_CTRL_BVALID_FALL (1 << 3) | |
47 | #define ISP1704_PWR_CTRL_DP_WKPU_EN (1 << 4) | |
48 | #define ISP1704_PWR_CTRL_VDAT_DET (1 << 5) | |
49 | #define ISP1704_PWR_CTRL_DPVSRC_EN (1 << 6) | |
50 | #define ISP1704_PWR_CTRL_HWDETECT (1 << 7) | |
51 | ||
52 | #define NXP_VENDOR_ID 0x04cc | |
53 | ||
54 | static u16 isp170x_id[] = { | |
55 | 0x1704, | |
56 | 0x1707, | |
57 | }; | |
58 | ||
59 | struct isp1704_charger { | |
297d716f KK |
60 | struct device *dev; |
61 | struct power_supply *psy; | |
62 | struct power_supply_desc psy_desc; | |
63 | struct usb_phy *phy; | |
64 | struct notifier_block nb; | |
65 | struct work_struct work; | |
ec46475f | 66 | |
bac43b20 | 67 | /* properties */ |
746d8fb8 | 68 | char model[8]; |
ec46475f | 69 | unsigned present:1; |
bac43b20 HK |
70 | unsigned online:1; |
71 | unsigned current_max; | |
ec46475f HK |
72 | }; |
73 | ||
fcc8ebc9 HK |
74 | static inline int isp1704_read(struct isp1704_charger *isp, u32 reg) |
75 | { | |
76 | return usb_phy_io_read(isp->phy, reg); | |
77 | } | |
78 | ||
88025632 | 79 | static inline int isp1704_write(struct isp1704_charger *isp, u32 reg, u32 val) |
fcc8ebc9 HK |
80 | { |
81 | return usb_phy_io_write(isp->phy, val, reg); | |
82 | } | |
83 | ||
2785cefc KJ |
84 | /* |
85 | * Disable/enable the power from the isp1704 if a function for it | |
86 | * has been provided with platform data. | |
87 | */ | |
88 | static void isp1704_charger_set_power(struct isp1704_charger *isp, bool on) | |
89 | { | |
90 | struct isp1704_charger_data *board = isp->dev->platform_data; | |
91 | ||
c934502d | 92 | if (board && board->set_power) |
2785cefc | 93 | board->set_power(on); |
34a10961 SR |
94 | else if (board) |
95 | gpio_set_value(board->enable_gpio, on); | |
2785cefc KJ |
96 | } |
97 | ||
bac43b20 HK |
98 | /* |
99 | * Determine is the charging port DCP (dedicated charger) or CDP (Host/HUB | |
100 | * chargers). | |
101 | * | |
102 | * REVISIT: The method is defined in Battery Charging Specification and is | |
103 | * applicable to any ULPI transceiver. Nothing isp170x specific here. | |
104 | */ | |
105 | static inline int isp1704_charger_type(struct isp1704_charger *isp) | |
106 | { | |
107 | u8 reg; | |
108 | u8 func_ctrl; | |
109 | u8 otg_ctrl; | |
110 | int type = POWER_SUPPLY_TYPE_USB_DCP; | |
111 | ||
fcc8ebc9 HK |
112 | func_ctrl = isp1704_read(isp, ULPI_FUNC_CTRL); |
113 | otg_ctrl = isp1704_read(isp, ULPI_OTG_CTRL); | |
bac43b20 HK |
114 | |
115 | /* disable pulldowns */ | |
116 | reg = ULPI_OTG_CTRL_DM_PULLDOWN | ULPI_OTG_CTRL_DP_PULLDOWN; | |
fcc8ebc9 | 117 | isp1704_write(isp, ULPI_CLR(ULPI_OTG_CTRL), reg); |
bac43b20 HK |
118 | |
119 | /* full speed */ | |
fcc8ebc9 | 120 | isp1704_write(isp, ULPI_CLR(ULPI_FUNC_CTRL), |
bac43b20 | 121 | ULPI_FUNC_CTRL_XCVRSEL_MASK); |
fcc8ebc9 | 122 | isp1704_write(isp, ULPI_SET(ULPI_FUNC_CTRL), |
bac43b20 HK |
123 | ULPI_FUNC_CTRL_FULL_SPEED); |
124 | ||
125 | /* Enable strong pull-up on DP (1.5K) and reset */ | |
126 | reg = ULPI_FUNC_CTRL_TERMSELECT | ULPI_FUNC_CTRL_RESET; | |
fcc8ebc9 | 127 | isp1704_write(isp, ULPI_SET(ULPI_FUNC_CTRL), reg); |
bac43b20 HK |
128 | usleep_range(1000, 2000); |
129 | ||
fcc8ebc9 | 130 | reg = isp1704_read(isp, ULPI_DEBUG); |
bac43b20 HK |
131 | if ((reg & 3) != 3) |
132 | type = POWER_SUPPLY_TYPE_USB_CDP; | |
133 | ||
134 | /* recover original state */ | |
fcc8ebc9 HK |
135 | isp1704_write(isp, ULPI_FUNC_CTRL, func_ctrl); |
136 | isp1704_write(isp, ULPI_OTG_CTRL, otg_ctrl); | |
bac43b20 HK |
137 | |
138 | return type; | |
139 | } | |
140 | ||
ec46475f HK |
141 | /* |
142 | * ISP1704 detects PS/2 adapters as charger. To make sure the detected charger | |
143 | * is actually a dedicated charger, the following steps need to be taken. | |
144 | */ | |
145 | static inline int isp1704_charger_verify(struct isp1704_charger *isp) | |
146 | { | |
147 | int ret = 0; | |
148 | u8 r; | |
149 | ||
150 | /* Reset the transceiver */ | |
fcc8ebc9 | 151 | r = isp1704_read(isp, ULPI_FUNC_CTRL); |
ec46475f | 152 | r |= ULPI_FUNC_CTRL_RESET; |
fcc8ebc9 | 153 | isp1704_write(isp, ULPI_FUNC_CTRL, r); |
ec46475f HK |
154 | usleep_range(1000, 2000); |
155 | ||
156 | /* Set normal mode */ | |
157 | r &= ~(ULPI_FUNC_CTRL_RESET | ULPI_FUNC_CTRL_OPMODE_MASK); | |
fcc8ebc9 | 158 | isp1704_write(isp, ULPI_FUNC_CTRL, r); |
ec46475f HK |
159 | |
160 | /* Clear the DP and DM pull-down bits */ | |
161 | r = ULPI_OTG_CTRL_DP_PULLDOWN | ULPI_OTG_CTRL_DM_PULLDOWN; | |
fcc8ebc9 | 162 | isp1704_write(isp, ULPI_CLR(ULPI_OTG_CTRL), r); |
ec46475f HK |
163 | |
164 | /* Enable strong pull-up on DP (1.5K) and reset */ | |
165 | r = ULPI_FUNC_CTRL_TERMSELECT | ULPI_FUNC_CTRL_RESET; | |
fcc8ebc9 | 166 | isp1704_write(isp, ULPI_SET(ULPI_FUNC_CTRL), r); |
ec46475f HK |
167 | usleep_range(1000, 2000); |
168 | ||
169 | /* Read the line state */ | |
fcc8ebc9 | 170 | if (!isp1704_read(isp, ULPI_DEBUG)) { |
ec46475f | 171 | /* Disable strong pull-up on DP (1.5K) */ |
fcc8ebc9 | 172 | isp1704_write(isp, ULPI_CLR(ULPI_FUNC_CTRL), |
ec46475f HK |
173 | ULPI_FUNC_CTRL_TERMSELECT); |
174 | return 1; | |
175 | } | |
176 | ||
177 | /* Is it a charger or PS/2 connection */ | |
178 | ||
179 | /* Enable weak pull-up resistor on DP */ | |
fcc8ebc9 | 180 | isp1704_write(isp, ULPI_SET(ISP1704_PWR_CTRL), |
ec46475f HK |
181 | ISP1704_PWR_CTRL_DP_WKPU_EN); |
182 | ||
183 | /* Disable strong pull-up on DP (1.5K) */ | |
fcc8ebc9 | 184 | isp1704_write(isp, ULPI_CLR(ULPI_FUNC_CTRL), |
ec46475f HK |
185 | ULPI_FUNC_CTRL_TERMSELECT); |
186 | ||
187 | /* Enable weak pull-down resistor on DM */ | |
fcc8ebc9 | 188 | isp1704_write(isp, ULPI_SET(ULPI_OTG_CTRL), |
ec46475f HK |
189 | ULPI_OTG_CTRL_DM_PULLDOWN); |
190 | ||
191 | /* It's a charger if the line states are clear */ | |
fcc8ebc9 | 192 | if (!(isp1704_read(isp, ULPI_DEBUG))) |
ec46475f HK |
193 | ret = 1; |
194 | ||
195 | /* Disable weak pull-up resistor on DP */ | |
fcc8ebc9 | 196 | isp1704_write(isp, ULPI_CLR(ISP1704_PWR_CTRL), |
ec46475f HK |
197 | ISP1704_PWR_CTRL_DP_WKPU_EN); |
198 | ||
199 | return ret; | |
200 | } | |
201 | ||
202 | static inline int isp1704_charger_detect(struct isp1704_charger *isp) | |
203 | { | |
204 | unsigned long timeout; | |
bac43b20 | 205 | u8 pwr_ctrl; |
ec46475f HK |
206 | int ret = 0; |
207 | ||
fcc8ebc9 | 208 | pwr_ctrl = isp1704_read(isp, ISP1704_PWR_CTRL); |
bac43b20 | 209 | |
ec46475f | 210 | /* set SW control bit in PWR_CTRL register */ |
fcc8ebc9 | 211 | isp1704_write(isp, ISP1704_PWR_CTRL, |
ec46475f HK |
212 | ISP1704_PWR_CTRL_SWCTRL); |
213 | ||
214 | /* enable manual charger detection */ | |
fcc8ebc9 | 215 | isp1704_write(isp, ULPI_SET(ISP1704_PWR_CTRL), |
bac43b20 HK |
216 | ISP1704_PWR_CTRL_SWCTRL |
217 | | ISP1704_PWR_CTRL_DPVSRC_EN); | |
ec46475f HK |
218 | usleep_range(1000, 2000); |
219 | ||
220 | timeout = jiffies + msecs_to_jiffies(300); | |
221 | do { | |
222 | /* Check if there is a charger */ | |
fcc8ebc9 | 223 | if (isp1704_read(isp, ISP1704_PWR_CTRL) |
ec46475f HK |
224 | & ISP1704_PWR_CTRL_VDAT_DET) { |
225 | ret = isp1704_charger_verify(isp); | |
226 | break; | |
227 | } | |
bac43b20 HK |
228 | } while (!time_after(jiffies, timeout) && isp->online); |
229 | ||
230 | /* recover original state */ | |
fcc8ebc9 | 231 | isp1704_write(isp, ISP1704_PWR_CTRL, pwr_ctrl); |
ec46475f HK |
232 | |
233 | return ret; | |
234 | } | |
235 | ||
f07c11ea PR |
236 | static inline int isp1704_charger_detect_dcp(struct isp1704_charger *isp) |
237 | { | |
238 | if (isp1704_charger_detect(isp) && | |
239 | isp1704_charger_type(isp) == POWER_SUPPLY_TYPE_USB_DCP) | |
240 | return true; | |
241 | else | |
242 | return false; | |
243 | } | |
244 | ||
ec46475f HK |
245 | static void isp1704_charger_work(struct work_struct *data) |
246 | { | |
ec46475f HK |
247 | struct isp1704_charger *isp = |
248 | container_of(data, struct isp1704_charger, work); | |
bac43b20 | 249 | static DEFINE_MUTEX(lock); |
ec46475f | 250 | |
bac43b20 | 251 | mutex_lock(&lock); |
ec46475f | 252 | |
f07c11ea | 253 | switch (isp->phy->last_event) { |
ec46475f | 254 | case USB_EVENT_VBUS: |
f07c11ea PR |
255 | /* do not call wall charger detection more times */ |
256 | if (!isp->present) { | |
257 | isp->online = true; | |
258 | isp->present = 1; | |
259 | isp1704_charger_set_power(isp, 1); | |
260 | ||
261 | /* detect wall charger */ | |
262 | if (isp1704_charger_detect_dcp(isp)) { | |
297d716f | 263 | isp->psy_desc.type = POWER_SUPPLY_TYPE_USB_DCP; |
f07c11ea PR |
264 | isp->current_max = 1800; |
265 | } else { | |
297d716f | 266 | isp->psy_desc.type = POWER_SUPPLY_TYPE_USB; |
f07c11ea PR |
267 | isp->current_max = 500; |
268 | } | |
bac43b20 | 269 | |
f07c11ea PR |
270 | /* enable data pullups */ |
271 | if (isp->phy->otg->gadget) | |
272 | usb_gadget_connect(isp->phy->otg->gadget); | |
bac43b20 HK |
273 | } |
274 | ||
297d716f | 275 | if (isp->psy_desc.type != POWER_SUPPLY_TYPE_USB_DCP) { |
bac43b20 HK |
276 | /* |
277 | * Only 500mA here or high speed chirp | |
278 | * handshaking may break | |
279 | */ | |
f07c11ea PR |
280 | if (isp->current_max > 500) |
281 | isp->current_max = 500; | |
282 | ||
283 | if (isp->current_max > 100) | |
297d716f | 284 | isp->psy_desc.type = POWER_SUPPLY_TYPE_USB_CDP; |
bac43b20 | 285 | } |
ec46475f HK |
286 | break; |
287 | case USB_EVENT_NONE: | |
bac43b20 | 288 | isp->online = false; |
bac43b20 HK |
289 | isp->present = 0; |
290 | isp->current_max = 0; | |
297d716f | 291 | isp->psy_desc.type = POWER_SUPPLY_TYPE_USB; |
bac43b20 HK |
292 | |
293 | /* | |
294 | * Disable data pullups. We need to prevent the controller from | |
295 | * enumerating. | |
296 | * | |
297 | * FIXME: This is here to allow charger detection with Host/HUB | |
298 | * chargers. The pullups may be enabled elsewhere, so this can | |
299 | * not be the final solution. | |
300 | */ | |
b1c711d6 HK |
301 | if (isp->phy->otg->gadget) |
302 | usb_gadget_disconnect(isp->phy->otg->gadget); | |
2785cefc KJ |
303 | |
304 | isp1704_charger_set_power(isp, 0); | |
bac43b20 | 305 | break; |
ec46475f | 306 | default: |
bac43b20 | 307 | goto out; |
ec46475f HK |
308 | } |
309 | ||
297d716f | 310 | power_supply_changed(isp->psy); |
bac43b20 HK |
311 | out: |
312 | mutex_unlock(&lock); | |
313 | } | |
314 | ||
315 | static int isp1704_notifier_call(struct notifier_block *nb, | |
f07c11ea | 316 | unsigned long val, void *v) |
bac43b20 HK |
317 | { |
318 | struct isp1704_charger *isp = | |
319 | container_of(nb, struct isp1704_charger, nb); | |
320 | ||
bac43b20 HK |
321 | schedule_work(&isp->work); |
322 | ||
ec46475f HK |
323 | return NOTIFY_OK; |
324 | } | |
325 | ||
326 | static int isp1704_charger_get_property(struct power_supply *psy, | |
327 | enum power_supply_property psp, | |
328 | union power_supply_propval *val) | |
329 | { | |
297d716f | 330 | struct isp1704_charger *isp = power_supply_get_drvdata(psy); |
ec46475f HK |
331 | |
332 | switch (psp) { | |
333 | case POWER_SUPPLY_PROP_PRESENT: | |
334 | val->intval = isp->present; | |
335 | break; | |
bac43b20 HK |
336 | case POWER_SUPPLY_PROP_ONLINE: |
337 | val->intval = isp->online; | |
338 | break; | |
339 | case POWER_SUPPLY_PROP_CURRENT_MAX: | |
340 | val->intval = isp->current_max; | |
341 | break; | |
ec46475f HK |
342 | case POWER_SUPPLY_PROP_MODEL_NAME: |
343 | val->strval = isp->model; | |
344 | break; | |
345 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
346 | val->strval = "NXP"; | |
347 | break; | |
348 | default: | |
349 | return -EINVAL; | |
350 | } | |
351 | return 0; | |
352 | } | |
353 | ||
354 | static enum power_supply_property power_props[] = { | |
355 | POWER_SUPPLY_PROP_PRESENT, | |
bac43b20 HK |
356 | POWER_SUPPLY_PROP_ONLINE, |
357 | POWER_SUPPLY_PROP_CURRENT_MAX, | |
ec46475f HK |
358 | POWER_SUPPLY_PROP_MODEL_NAME, |
359 | POWER_SUPPLY_PROP_MANUFACTURER, | |
360 | }; | |
361 | ||
362 | static inline int isp1704_test_ulpi(struct isp1704_charger *isp) | |
363 | { | |
364 | int vendor; | |
365 | int product; | |
366 | int i; | |
367 | int ret = -ENODEV; | |
368 | ||
369 | /* Test ULPI interface */ | |
fcc8ebc9 | 370 | ret = isp1704_write(isp, ULPI_SCRATCH, 0xaa); |
ec46475f HK |
371 | if (ret < 0) |
372 | return ret; | |
373 | ||
fcc8ebc9 | 374 | ret = isp1704_read(isp, ULPI_SCRATCH); |
ec46475f HK |
375 | if (ret < 0) |
376 | return ret; | |
377 | ||
378 | if (ret != 0xaa) | |
379 | return -ENODEV; | |
380 | ||
381 | /* Verify the product and vendor id matches */ | |
fcc8ebc9 HK |
382 | vendor = isp1704_read(isp, ULPI_VENDOR_ID_LOW); |
383 | vendor |= isp1704_read(isp, ULPI_VENDOR_ID_HIGH) << 8; | |
ec46475f HK |
384 | if (vendor != NXP_VENDOR_ID) |
385 | return -ENODEV; | |
386 | ||
fcc8ebc9 HK |
387 | product = isp1704_read(isp, ULPI_PRODUCT_ID_LOW); |
388 | product |= isp1704_read(isp, ULPI_PRODUCT_ID_HIGH) << 8; | |
ec46475f HK |
389 | |
390 | for (i = 0; i < ARRAY_SIZE(isp170x_id); i++) { | |
391 | if (product == isp170x_id[i]) { | |
392 | sprintf(isp->model, "isp%x", product); | |
393 | return product; | |
394 | } | |
395 | } | |
396 | ||
397 | dev_err(isp->dev, "product id %x not matching known ids", product); | |
398 | ||
399 | return -ENODEV; | |
400 | } | |
401 | ||
c8afa640 | 402 | static int isp1704_charger_probe(struct platform_device *pdev) |
ec46475f HK |
403 | { |
404 | struct isp1704_charger *isp; | |
405 | int ret = -ENODEV; | |
297d716f | 406 | struct power_supply_config psy_cfg = {}; |
ec46475f | 407 | |
34a10961 SR |
408 | struct isp1704_charger_data *pdata = dev_get_platdata(&pdev->dev); |
409 | struct device_node *np = pdev->dev.of_node; | |
410 | ||
411 | if (np) { | |
412 | int gpio = of_get_named_gpio(np, "nxp,enable-gpio", 0); | |
413 | ||
ed6107be PR |
414 | if (gpio < 0) { |
415 | dev_err(&pdev->dev, "missing DT GPIO nxp,enable-gpio\n"); | |
34a10961 | 416 | return gpio; |
ed6107be | 417 | } |
34a10961 SR |
418 | |
419 | pdata = devm_kzalloc(&pdev->dev, | |
420 | sizeof(struct isp1704_charger_data), GFP_KERNEL); | |
421 | pdata->enable_gpio = gpio; | |
422 | ||
423 | dev_info(&pdev->dev, "init gpio %d\n", pdata->enable_gpio); | |
424 | ||
425 | ret = devm_gpio_request_one(&pdev->dev, pdata->enable_gpio, | |
426 | GPIOF_OUT_INIT_HIGH, "isp1704_reset"); | |
ed6107be PR |
427 | if (ret) { |
428 | dev_err(&pdev->dev, "gpio request failed\n"); | |
34a10961 | 429 | goto fail0; |
ed6107be | 430 | } |
34a10961 SR |
431 | } |
432 | ||
433 | if (!pdata) { | |
434 | dev_err(&pdev->dev, "missing platform data!\n"); | |
435 | return -ENODEV; | |
436 | } | |
437 | ||
438 | ||
2a2ce52a | 439 | isp = devm_kzalloc(&pdev->dev, sizeof(*isp), GFP_KERNEL); |
ec46475f HK |
440 | if (!isp) |
441 | return -ENOMEM; | |
442 | ||
34a10961 SR |
443 | if (np) |
444 | isp->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0); | |
445 | else | |
446 | isp->phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2); | |
447 | ||
448 | if (IS_ERR(isp->phy)) { | |
449 | ret = PTR_ERR(isp->phy); | |
ed6107be | 450 | dev_err(&pdev->dev, "usb_get_phy failed\n"); |
34a10961 SR |
451 | goto fail0; |
452 | } | |
ec46475f | 453 | |
a4607d9f HK |
454 | isp->dev = &pdev->dev; |
455 | platform_set_drvdata(pdev, isp); | |
456 | ||
2785cefc KJ |
457 | isp1704_charger_set_power(isp, 1); |
458 | ||
ec46475f | 459 | ret = isp1704_test_ulpi(isp); |
ed6107be PR |
460 | if (ret < 0) { |
461 | dev_err(&pdev->dev, "isp1704_test_ulpi failed\n"); | |
ec46475f | 462 | goto fail1; |
ed6107be | 463 | } |
ec46475f | 464 | |
297d716f KK |
465 | isp->psy_desc.name = "isp1704"; |
466 | isp->psy_desc.type = POWER_SUPPLY_TYPE_USB; | |
467 | isp->psy_desc.properties = power_props; | |
468 | isp->psy_desc.num_properties = ARRAY_SIZE(power_props); | |
469 | isp->psy_desc.get_property = isp1704_charger_get_property; | |
ec46475f | 470 | |
297d716f KK |
471 | psy_cfg.drv_data = isp; |
472 | ||
473 | isp->psy = power_supply_register(isp->dev, &isp->psy_desc, &psy_cfg); | |
474 | if (IS_ERR(isp->psy)) { | |
475 | ret = PTR_ERR(isp->psy); | |
ed6107be | 476 | dev_err(&pdev->dev, "power_supply_register failed\n"); |
ec46475f | 477 | goto fail1; |
297d716f | 478 | } |
ec46475f HK |
479 | |
480 | /* | |
fcc8ebc9 | 481 | * REVISIT: using work in order to allow the usb notifications to be |
ec46475f HK |
482 | * made atomically in the future. |
483 | */ | |
484 | INIT_WORK(&isp->work, isp1704_charger_work); | |
485 | ||
486 | isp->nb.notifier_call = isp1704_notifier_call; | |
487 | ||
fcc8ebc9 | 488 | ret = usb_register_notifier(isp->phy, &isp->nb); |
ed6107be PR |
489 | if (ret) { |
490 | dev_err(&pdev->dev, "usb_register_notifier failed\n"); | |
ec46475f | 491 | goto fail2; |
ed6107be | 492 | } |
ec46475f HK |
493 | |
494 | dev_info(isp->dev, "registered with product id %s\n", isp->model); | |
495 | ||
e1a85694 HK |
496 | /* |
497 | * Taking over the D+ pullup. | |
498 | * | |
499 | * FIXME: The device will be disconnected if it was already | |
500 | * enumerated. The charger driver should be always loaded before any | |
501 | * gadget is loaded. | |
502 | */ | |
b1c711d6 HK |
503 | if (isp->phy->otg->gadget) |
504 | usb_gadget_disconnect(isp->phy->otg->gadget); | |
e1a85694 | 505 | |
f07c11ea PR |
506 | if (isp->phy->last_event == USB_EVENT_NONE) |
507 | isp1704_charger_set_power(isp, 0); | |
508 | ||
e1a85694 | 509 | /* Detect charger if VBUS is valid (the cable was already plugged). */ |
f07c11ea PR |
510 | if (isp->phy->last_event == USB_EVENT_VBUS && |
511 | !isp->phy->otg->default_a) | |
e1a85694 | 512 | schedule_work(&isp->work); |
e1a85694 | 513 | |
ec46475f HK |
514 | return 0; |
515 | fail2: | |
297d716f | 516 | power_supply_unregister(isp->psy); |
ec46475f | 517 | fail1: |
81a08382 | 518 | isp1704_charger_set_power(isp, 0); |
ec46475f | 519 | fail0: |
ec46475f HK |
520 | dev_err(&pdev->dev, "failed to register isp1704 with error %d\n", ret); |
521 | ||
522 | return ret; | |
523 | } | |
524 | ||
415ec69f | 525 | static int isp1704_charger_remove(struct platform_device *pdev) |
ec46475f HK |
526 | { |
527 | struct isp1704_charger *isp = platform_get_drvdata(pdev); | |
528 | ||
fcc8ebc9 | 529 | usb_unregister_notifier(isp->phy, &isp->nb); |
297d716f | 530 | power_supply_unregister(isp->psy); |
2785cefc | 531 | isp1704_charger_set_power(isp, 0); |
ec46475f HK |
532 | |
533 | return 0; | |
534 | } | |
535 | ||
34a10961 SR |
536 | #ifdef CONFIG_OF |
537 | static const struct of_device_id omap_isp1704_of_match[] = { | |
538 | { .compatible = "nxp,isp1704", }, | |
64876fe5 | 539 | { .compatible = "nxp,isp1707", }, |
34a10961 SR |
540 | {}, |
541 | }; | |
542 | MODULE_DEVICE_TABLE(of, omap_isp1704_of_match); | |
543 | #endif | |
544 | ||
ec46475f HK |
545 | static struct platform_driver isp1704_charger_driver = { |
546 | .driver = { | |
547 | .name = "isp1704_charger", | |
34a10961 | 548 | .of_match_table = of_match_ptr(omap_isp1704_of_match), |
ec46475f HK |
549 | }, |
550 | .probe = isp1704_charger_probe, | |
28ea73f4 | 551 | .remove = isp1704_charger_remove, |
ec46475f HK |
552 | }; |
553 | ||
300bac7f | 554 | module_platform_driver(isp1704_charger_driver); |
ec46475f HK |
555 | |
556 | MODULE_ALIAS("platform:isp1704_charger"); | |
557 | MODULE_AUTHOR("Nokia Corporation"); | |
558 | MODULE_DESCRIPTION("ISP170x USB Charger driver"); | |
559 | MODULE_LICENSE("GPL"); |