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Heikki Krogerusec464752010-08-19 15:09:36 +03001/*
2 * ISP1704 USB Charger Detection driver
3 *
4 * Copyright (C) 2010 Nokia Corporation
Pali Rohárf07c11e2013-09-08 10:50:37 +02005 * Copyright (C) 2012 - 2013 Pali Rohár <pali.rohar@gmail.com>
Heikki Krogerusec464752010-08-19 15:09:36 +03006 *
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>
Sebastian Reichel34a10962013-12-01 02:00:10 +010032#include <linux/of.h>
33#include <linux/of_gpio.h>
Heikki Krogerusec464752010-08-19 15:09:36 +030034
35#include <linux/usb/otg.h>
36#include <linux/usb/ulpi.h>
37#include <linux/usb/ch9.h>
38#include <linux/usb/gadget.h>
Kalle Jokiniemi2785cef2011-03-29 16:27:59 +030039#include <linux/power/isp1704_charger.h>
Heikki Krogerusec464752010-08-19 15:09:36 +030040
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
54static u16 isp170x_id[] = {
55 0x1704,
56 0x1707,
57};
58
59struct isp1704_charger {
60 struct device *dev;
61 struct power_supply psy;
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +020062 struct usb_phy *phy;
Heikki Krogerusec464752010-08-19 15:09:36 +030063 struct notifier_block nb;
64 struct work_struct work;
65
Heikki Krogerusbac43b22010-11-04 16:31:47 +020066 /* properties */
Ameya Palande746d8fb2010-11-04 16:31:46 +020067 char model[8];
Heikki Krogerusec464752010-08-19 15:09:36 +030068 unsigned present:1;
Heikki Krogerusbac43b22010-11-04 16:31:47 +020069 unsigned online:1;
70 unsigned current_max;
Heikki Krogerusec464752010-08-19 15:09:36 +030071};
72
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +020073static inline int isp1704_read(struct isp1704_charger *isp, u32 reg)
74{
75 return usb_phy_io_read(isp->phy, reg);
76}
77
78static inline int isp1704_write(struct isp1704_charger *isp, u32 val, u32 reg)
79{
80 return usb_phy_io_write(isp->phy, val, reg);
81}
82
Heikki Krogerusec464752010-08-19 15:09:36 +030083/*
Kalle Jokiniemi2785cef2011-03-29 16:27:59 +030084 * Disable/enable the power from the isp1704 if a function for it
85 * has been provided with platform data.
86 */
87static void isp1704_charger_set_power(struct isp1704_charger *isp, bool on)
88{
89 struct isp1704_charger_data *board = isp->dev->platform_data;
90
Felipe Contrerasc9345022012-01-06 06:00:48 +040091 if (board && board->set_power)
Kalle Jokiniemi2785cef2011-03-29 16:27:59 +030092 board->set_power(on);
Sebastian Reichel34a10962013-12-01 02:00:10 +010093 else if (board)
94 gpio_set_value(board->enable_gpio, on);
Kalle Jokiniemi2785cef2011-03-29 16:27:59 +030095}
96
97/*
Heikki Krogerusbac43b22010-11-04 16:31:47 +020098 * Determine is the charging port DCP (dedicated charger) or CDP (Host/HUB
99 * chargers).
100 *
101 * REVISIT: The method is defined in Battery Charging Specification and is
102 * applicable to any ULPI transceiver. Nothing isp170x specific here.
103 */
104static inline int isp1704_charger_type(struct isp1704_charger *isp)
105{
106 u8 reg;
107 u8 func_ctrl;
108 u8 otg_ctrl;
109 int type = POWER_SUPPLY_TYPE_USB_DCP;
110
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200111 func_ctrl = isp1704_read(isp, ULPI_FUNC_CTRL);
112 otg_ctrl = isp1704_read(isp, ULPI_OTG_CTRL);
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200113
114 /* disable pulldowns */
115 reg = ULPI_OTG_CTRL_DM_PULLDOWN | ULPI_OTG_CTRL_DP_PULLDOWN;
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200116 isp1704_write(isp, ULPI_CLR(ULPI_OTG_CTRL), reg);
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200117
118 /* full speed */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200119 isp1704_write(isp, ULPI_CLR(ULPI_FUNC_CTRL),
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200120 ULPI_FUNC_CTRL_XCVRSEL_MASK);
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200121 isp1704_write(isp, ULPI_SET(ULPI_FUNC_CTRL),
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200122 ULPI_FUNC_CTRL_FULL_SPEED);
123
124 /* Enable strong pull-up on DP (1.5K) and reset */
125 reg = ULPI_FUNC_CTRL_TERMSELECT | ULPI_FUNC_CTRL_RESET;
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200126 isp1704_write(isp, ULPI_SET(ULPI_FUNC_CTRL), reg);
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200127 usleep_range(1000, 2000);
128
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200129 reg = isp1704_read(isp, ULPI_DEBUG);
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200130 if ((reg & 3) != 3)
131 type = POWER_SUPPLY_TYPE_USB_CDP;
132
133 /* recover original state */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200134 isp1704_write(isp, ULPI_FUNC_CTRL, func_ctrl);
135 isp1704_write(isp, ULPI_OTG_CTRL, otg_ctrl);
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200136
137 return type;
138}
139
140/*
Heikki Krogerusec464752010-08-19 15:09:36 +0300141 * ISP1704 detects PS/2 adapters as charger. To make sure the detected charger
142 * is actually a dedicated charger, the following steps need to be taken.
143 */
144static inline int isp1704_charger_verify(struct isp1704_charger *isp)
145{
146 int ret = 0;
147 u8 r;
148
149 /* Reset the transceiver */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200150 r = isp1704_read(isp, ULPI_FUNC_CTRL);
Heikki Krogerusec464752010-08-19 15:09:36 +0300151 r |= ULPI_FUNC_CTRL_RESET;
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200152 isp1704_write(isp, ULPI_FUNC_CTRL, r);
Heikki Krogerusec464752010-08-19 15:09:36 +0300153 usleep_range(1000, 2000);
154
155 /* Set normal mode */
156 r &= ~(ULPI_FUNC_CTRL_RESET | ULPI_FUNC_CTRL_OPMODE_MASK);
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200157 isp1704_write(isp, ULPI_FUNC_CTRL, r);
Heikki Krogerusec464752010-08-19 15:09:36 +0300158
159 /* Clear the DP and DM pull-down bits */
160 r = ULPI_OTG_CTRL_DP_PULLDOWN | ULPI_OTG_CTRL_DM_PULLDOWN;
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200161 isp1704_write(isp, ULPI_CLR(ULPI_OTG_CTRL), r);
Heikki Krogerusec464752010-08-19 15:09:36 +0300162
163 /* Enable strong pull-up on DP (1.5K) and reset */
164 r = ULPI_FUNC_CTRL_TERMSELECT | ULPI_FUNC_CTRL_RESET;
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200165 isp1704_write(isp, ULPI_SET(ULPI_FUNC_CTRL), r);
Heikki Krogerusec464752010-08-19 15:09:36 +0300166 usleep_range(1000, 2000);
167
168 /* Read the line state */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200169 if (!isp1704_read(isp, ULPI_DEBUG)) {
Heikki Krogerusec464752010-08-19 15:09:36 +0300170 /* Disable strong pull-up on DP (1.5K) */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200171 isp1704_write(isp, ULPI_CLR(ULPI_FUNC_CTRL),
Heikki Krogerusec464752010-08-19 15:09:36 +0300172 ULPI_FUNC_CTRL_TERMSELECT);
173 return 1;
174 }
175
176 /* Is it a charger or PS/2 connection */
177
178 /* Enable weak pull-up resistor on DP */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200179 isp1704_write(isp, ULPI_SET(ISP1704_PWR_CTRL),
Heikki Krogerusec464752010-08-19 15:09:36 +0300180 ISP1704_PWR_CTRL_DP_WKPU_EN);
181
182 /* Disable strong pull-up on DP (1.5K) */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200183 isp1704_write(isp, ULPI_CLR(ULPI_FUNC_CTRL),
Heikki Krogerusec464752010-08-19 15:09:36 +0300184 ULPI_FUNC_CTRL_TERMSELECT);
185
186 /* Enable weak pull-down resistor on DM */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200187 isp1704_write(isp, ULPI_SET(ULPI_OTG_CTRL),
Heikki Krogerusec464752010-08-19 15:09:36 +0300188 ULPI_OTG_CTRL_DM_PULLDOWN);
189
190 /* It's a charger if the line states are clear */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200191 if (!(isp1704_read(isp, ULPI_DEBUG)))
Heikki Krogerusec464752010-08-19 15:09:36 +0300192 ret = 1;
193
194 /* Disable weak pull-up resistor on DP */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200195 isp1704_write(isp, ULPI_CLR(ISP1704_PWR_CTRL),
Heikki Krogerusec464752010-08-19 15:09:36 +0300196 ISP1704_PWR_CTRL_DP_WKPU_EN);
197
198 return ret;
199}
200
201static inline int isp1704_charger_detect(struct isp1704_charger *isp)
202{
203 unsigned long timeout;
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200204 u8 pwr_ctrl;
Heikki Krogerusec464752010-08-19 15:09:36 +0300205 int ret = 0;
206
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200207 pwr_ctrl = isp1704_read(isp, ISP1704_PWR_CTRL);
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200208
Heikki Krogerusec464752010-08-19 15:09:36 +0300209 /* set SW control bit in PWR_CTRL register */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200210 isp1704_write(isp, ISP1704_PWR_CTRL,
Heikki Krogerusec464752010-08-19 15:09:36 +0300211 ISP1704_PWR_CTRL_SWCTRL);
212
213 /* enable manual charger detection */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200214 isp1704_write(isp, ULPI_SET(ISP1704_PWR_CTRL),
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200215 ISP1704_PWR_CTRL_SWCTRL
216 | ISP1704_PWR_CTRL_DPVSRC_EN);
Heikki Krogerusec464752010-08-19 15:09:36 +0300217 usleep_range(1000, 2000);
218
219 timeout = jiffies + msecs_to_jiffies(300);
220 do {
221 /* Check if there is a charger */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200222 if (isp1704_read(isp, ISP1704_PWR_CTRL)
Heikki Krogerusec464752010-08-19 15:09:36 +0300223 & ISP1704_PWR_CTRL_VDAT_DET) {
224 ret = isp1704_charger_verify(isp);
225 break;
226 }
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200227 } while (!time_after(jiffies, timeout) && isp->online);
228
229 /* recover original state */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200230 isp1704_write(isp, ISP1704_PWR_CTRL, pwr_ctrl);
Heikki Krogerusec464752010-08-19 15:09:36 +0300231
232 return ret;
233}
234
Pali Rohárf07c11e2013-09-08 10:50:37 +0200235static inline int isp1704_charger_detect_dcp(struct isp1704_charger *isp)
236{
237 if (isp1704_charger_detect(isp) &&
238 isp1704_charger_type(isp) == POWER_SUPPLY_TYPE_USB_DCP)
239 return true;
240 else
241 return false;
242}
243
Heikki Krogerusec464752010-08-19 15:09:36 +0300244static void isp1704_charger_work(struct work_struct *data)
245{
Heikki Krogerusec464752010-08-19 15:09:36 +0300246 struct isp1704_charger *isp =
247 container_of(data, struct isp1704_charger, work);
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200248 static DEFINE_MUTEX(lock);
Heikki Krogerusec464752010-08-19 15:09:36 +0300249
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200250 mutex_lock(&lock);
Heikki Krogerusec464752010-08-19 15:09:36 +0300251
Pali Rohárf07c11e2013-09-08 10:50:37 +0200252 switch (isp->phy->last_event) {
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200253 case USB_EVENT_VBUS:
Pali Rohárf07c11e2013-09-08 10:50:37 +0200254 /* do not call wall charger detection more times */
255 if (!isp->present) {
256 isp->online = true;
257 isp->present = 1;
258 isp1704_charger_set_power(isp, 1);
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200259
Pali Rohárf07c11e2013-09-08 10:50:37 +0200260 /* detect wall charger */
261 if (isp1704_charger_detect_dcp(isp)) {
262 isp->psy.type = POWER_SUPPLY_TYPE_USB_DCP;
263 isp->current_max = 1800;
264 } else {
265 isp->psy.type = POWER_SUPPLY_TYPE_USB;
266 isp->current_max = 500;
267 }
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200268
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200269 /* enable data pullups */
Heikki Krogerusb1c711d2012-02-13 13:24:17 +0200270 if (isp->phy->otg->gadget)
271 usb_gadget_connect(isp->phy->otg->gadget);
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200272 }
Pali Rohárf07c11e2013-09-08 10:50:37 +0200273
274 if (isp->psy.type != POWER_SUPPLY_TYPE_USB_DCP) {
275 /*
276 * Only 500mA here or high speed chirp
277 * handshaking may break
278 */
279 if (isp->current_max > 500)
280 isp->current_max = 500;
281
282 if (isp->current_max > 100)
283 isp->psy.type = POWER_SUPPLY_TYPE_USB_CDP;
284 }
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200285 break;
286 case USB_EVENT_NONE:
287 isp->online = false;
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200288 isp->present = 0;
289 isp->current_max = 0;
290 isp->psy.type = POWER_SUPPLY_TYPE_USB;
291
292 /*
293 * Disable data pullups. We need to prevent the controller from
294 * enumerating.
295 *
296 * FIXME: This is here to allow charger detection with Host/HUB
297 * chargers. The pullups may be enabled elsewhere, so this can
298 * not be the final solution.
299 */
Heikki Krogerusb1c711d2012-02-13 13:24:17 +0200300 if (isp->phy->otg->gadget)
301 usb_gadget_disconnect(isp->phy->otg->gadget);
Kalle Jokiniemi2785cef2011-03-29 16:27:59 +0300302
303 isp1704_charger_set_power(isp, 0);
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200304 break;
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200305 default:
306 goto out;
Heikki Krogerusec464752010-08-19 15:09:36 +0300307 }
308
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200309 power_supply_changed(&isp->psy);
310out:
311 mutex_unlock(&lock);
Heikki Krogerusec464752010-08-19 15:09:36 +0300312}
313
314static int isp1704_notifier_call(struct notifier_block *nb,
Pali Rohárf07c11e2013-09-08 10:50:37 +0200315 unsigned long val, void *v)
Heikki Krogerusec464752010-08-19 15:09:36 +0300316{
317 struct isp1704_charger *isp =
318 container_of(nb, struct isp1704_charger, nb);
319
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200320 schedule_work(&isp->work);
Heikki Krogerusec464752010-08-19 15:09:36 +0300321
322 return NOTIFY_OK;
323}
324
325static int isp1704_charger_get_property(struct power_supply *psy,
326 enum power_supply_property psp,
327 union power_supply_propval *val)
328{
329 struct isp1704_charger *isp =
330 container_of(psy, struct isp1704_charger, psy);
331
332 switch (psp) {
333 case POWER_SUPPLY_PROP_PRESENT:
334 val->intval = isp->present;
335 break;
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200336 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;
Heikki Krogerusec464752010-08-19 15:09:36 +0300342 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
354static enum power_supply_property power_props[] = {
355 POWER_SUPPLY_PROP_PRESENT,
Heikki Krogerusbac43b22010-11-04 16:31:47 +0200356 POWER_SUPPLY_PROP_ONLINE,
357 POWER_SUPPLY_PROP_CURRENT_MAX,
Heikki Krogerusec464752010-08-19 15:09:36 +0300358 POWER_SUPPLY_PROP_MODEL_NAME,
359 POWER_SUPPLY_PROP_MANUFACTURER,
360};
361
362static 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 */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200370 ret = isp1704_write(isp, ULPI_SCRATCH, 0xaa);
Heikki Krogerusec464752010-08-19 15:09:36 +0300371 if (ret < 0)
372 return ret;
373
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200374 ret = isp1704_read(isp, ULPI_SCRATCH);
Heikki Krogerusec464752010-08-19 15:09:36 +0300375 if (ret < 0)
376 return ret;
377
378 if (ret != 0xaa)
379 return -ENODEV;
380
381 /* Verify the product and vendor id matches */
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200382 vendor = isp1704_read(isp, ULPI_VENDOR_ID_LOW);
383 vendor |= isp1704_read(isp, ULPI_VENDOR_ID_HIGH) << 8;
Heikki Krogerusec464752010-08-19 15:09:36 +0300384 if (vendor != NXP_VENDOR_ID)
385 return -ENODEV;
386
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200387 product = isp1704_read(isp, ULPI_PRODUCT_ID_LOW);
388 product |= isp1704_read(isp, ULPI_PRODUCT_ID_HIGH) << 8;
Heikki Krogerusec464752010-08-19 15:09:36 +0300389
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
Bill Pembertonc8afa642012-11-19 13:22:23 -0500402static int isp1704_charger_probe(struct platform_device *pdev)
Heikki Krogerusec464752010-08-19 15:09:36 +0300403{
404 struct isp1704_charger *isp;
405 int ret = -ENODEV;
406
Sebastian Reichel34a10962013-12-01 02:00:10 +0100407 struct isp1704_charger_data *pdata = dev_get_platdata(&pdev->dev);
408 struct device_node *np = pdev->dev.of_node;
409
410 if (np) {
411 int gpio = of_get_named_gpio(np, "nxp,enable-gpio", 0);
412
413 if (gpio < 0)
414 return gpio;
415
416 pdata = devm_kzalloc(&pdev->dev,
417 sizeof(struct isp1704_charger_data), GFP_KERNEL);
418 pdata->enable_gpio = gpio;
419
420 dev_info(&pdev->dev, "init gpio %d\n", pdata->enable_gpio);
421
422 ret = devm_gpio_request_one(&pdev->dev, pdata->enable_gpio,
423 GPIOF_OUT_INIT_HIGH, "isp1704_reset");
424 if (ret)
425 goto fail0;
426 }
427
428 if (!pdata) {
429 dev_err(&pdev->dev, "missing platform data!\n");
430 return -ENODEV;
431 }
432
433
Jingoo Han2a2ce522013-03-11 15:34:15 +0900434 isp = devm_kzalloc(&pdev->dev, sizeof(*isp), GFP_KERNEL);
Heikki Krogerusec464752010-08-19 15:09:36 +0300435 if (!isp)
436 return -ENOMEM;
437
Sebastian Reichel34a10962013-12-01 02:00:10 +0100438 if (np)
439 isp->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
440 else
441 isp->phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
442
443 if (IS_ERR(isp->phy)) {
444 ret = PTR_ERR(isp->phy);
445 goto fail0;
446 }
447 if (!isp->phy)
Heikki Krogerusec464752010-08-19 15:09:36 +0300448 goto fail0;
449
Heikki Krogerusa4607d92010-11-04 16:31:48 +0200450 isp->dev = &pdev->dev;
451 platform_set_drvdata(pdev, isp);
452
Kalle Jokiniemi2785cef2011-03-29 16:27:59 +0300453 isp1704_charger_set_power(isp, 1);
454
Heikki Krogerusec464752010-08-19 15:09:36 +0300455 ret = isp1704_test_ulpi(isp);
456 if (ret < 0)
457 goto fail1;
458
Heikki Krogerusec464752010-08-19 15:09:36 +0300459 isp->psy.name = "isp1704";
460 isp->psy.type = POWER_SUPPLY_TYPE_USB;
461 isp->psy.properties = power_props;
462 isp->psy.num_properties = ARRAY_SIZE(power_props);
463 isp->psy.get_property = isp1704_charger_get_property;
464
465 ret = power_supply_register(isp->dev, &isp->psy);
466 if (ret)
467 goto fail1;
468
469 /*
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200470 * REVISIT: using work in order to allow the usb notifications to be
Heikki Krogerusec464752010-08-19 15:09:36 +0300471 * made atomically in the future.
472 */
473 INIT_WORK(&isp->work, isp1704_charger_work);
474
475 isp->nb.notifier_call = isp1704_notifier_call;
476
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200477 ret = usb_register_notifier(isp->phy, &isp->nb);
Heikki Krogerusec464752010-08-19 15:09:36 +0300478 if (ret)
479 goto fail2;
480
481 dev_info(isp->dev, "registered with product id %s\n", isp->model);
482
Heikki Krogeruse1a85694e2010-11-08 12:22:40 +0200483 /*
484 * Taking over the D+ pullup.
485 *
486 * FIXME: The device will be disconnected if it was already
487 * enumerated. The charger driver should be always loaded before any
488 * gadget is loaded.
489 */
Heikki Krogerusb1c711d2012-02-13 13:24:17 +0200490 if (isp->phy->otg->gadget)
491 usb_gadget_disconnect(isp->phy->otg->gadget);
Heikki Krogeruse1a85694e2010-11-08 12:22:40 +0200492
Pali Rohárf07c11e2013-09-08 10:50:37 +0200493 if (isp->phy->last_event == USB_EVENT_NONE)
494 isp1704_charger_set_power(isp, 0);
495
Heikki Krogeruse1a85694e2010-11-08 12:22:40 +0200496 /* Detect charger if VBUS is valid (the cable was already plugged). */
Pali Rohárf07c11e2013-09-08 10:50:37 +0200497 if (isp->phy->last_event == USB_EVENT_VBUS &&
498 !isp->phy->otg->default_a)
Heikki Krogeruse1a85694e2010-11-08 12:22:40 +0200499 schedule_work(&isp->work);
Heikki Krogeruse1a85694e2010-11-08 12:22:40 +0200500
Heikki Krogerusec464752010-08-19 15:09:36 +0300501 return 0;
502fail2:
503 power_supply_unregister(&isp->psy);
504fail1:
Dan Carpenter81a08382012-03-27 23:22:13 +0300505 isp1704_charger_set_power(isp, 0);
Heikki Krogerusec464752010-08-19 15:09:36 +0300506fail0:
Heikki Krogerusec464752010-08-19 15:09:36 +0300507 dev_err(&pdev->dev, "failed to register isp1704 with error %d\n", ret);
508
509 return ret;
510}
511
Bill Pemberton415ec692012-11-19 13:26:07 -0500512static int isp1704_charger_remove(struct platform_device *pdev)
Heikki Krogerusec464752010-08-19 15:09:36 +0300513{
514 struct isp1704_charger *isp = platform_get_drvdata(pdev);
515
Heikki Krogerusfcc8ebc2012-02-13 13:24:16 +0200516 usb_unregister_notifier(isp->phy, &isp->nb);
Heikki Krogerusec464752010-08-19 15:09:36 +0300517 power_supply_unregister(&isp->psy);
Kalle Jokiniemi2785cef2011-03-29 16:27:59 +0300518 isp1704_charger_set_power(isp, 0);
Heikki Krogerusec464752010-08-19 15:09:36 +0300519
520 return 0;
521}
522
Sebastian Reichel34a10962013-12-01 02:00:10 +0100523#ifdef CONFIG_OF
524static const struct of_device_id omap_isp1704_of_match[] = {
525 { .compatible = "nxp,isp1704", },
526 {},
527};
528MODULE_DEVICE_TABLE(of, omap_isp1704_of_match);
529#endif
530
Heikki Krogerusec464752010-08-19 15:09:36 +0300531static struct platform_driver isp1704_charger_driver = {
532 .driver = {
533 .name = "isp1704_charger",
Sebastian Reichel34a10962013-12-01 02:00:10 +0100534 .of_match_table = of_match_ptr(omap_isp1704_of_match),
Heikki Krogerusec464752010-08-19 15:09:36 +0300535 },
536 .probe = isp1704_charger_probe,
Bill Pemberton28ea73f2012-11-19 13:20:40 -0500537 .remove = isp1704_charger_remove,
Heikki Krogerusec464752010-08-19 15:09:36 +0300538};
539
Axel Lin300bac72011-11-26 12:01:10 +0800540module_platform_driver(isp1704_charger_driver);
Heikki Krogerusec464752010-08-19 15:09:36 +0300541
542MODULE_ALIAS("platform:isp1704_charger");
543MODULE_AUTHOR("Nokia Corporation");
544MODULE_DESCRIPTION("ISP170x USB Charger driver");
545MODULE_LICENSE("GPL");