blob: 6b6af6cba45401ee98d1c7b967796157d2f9fcdc [file] [log] [blame]
David Brownell9ebd9612008-12-18 12:25:44 -08001/*
2 * twl4030_usb - TWL4030 USB transceiver, talking to OMAP OTG controller
3 *
4 * Copyright (C) 2004-2007 Texas Instruments
5 * Copyright (C) 2008 Nokia Corporation
6 * Contact: Felipe Balbi <felipe.balbi@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 * Current status:
23 * - HS USB ULPI mode works.
24 * - 3-pin mode support may be added in future.
25 */
26
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/interrupt.h>
30#include <linux/platform_device.h>
David Brownell9ebd9612008-12-18 12:25:44 -080031#include <linux/workqueue.h>
32#include <linux/io.h>
33#include <linux/delay.h>
34#include <linux/usb/otg.h>
Kishon Vijay Abraham I6747caa2013-09-27 11:53:27 +053035#include <linux/phy/phy.h>
Tony Lindgren96be39a2014-08-20 12:07:00 -070036#include <linux/pm_runtime.h>
Tony Lindgren80555552015-11-30 21:37:12 -080037#include <linux/usb/musb.h>
Heikki Krogerus92a6e6b2010-03-31 10:18:05 +030038#include <linux/usb/ulpi.h>
Santosh Shilimkarb07682b2009-12-13 20:05:51 +010039#include <linux/i2c/twl.h>
Jouni Hogander66760162009-02-20 14:02:31 +020040#include <linux/regulator/consumer.h>
41#include <linux/err.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090042#include <linux/slab.h>
David Brownell9ebd9612008-12-18 12:25:44 -080043
44/* Register defines */
45
David Brownell9ebd9612008-12-18 12:25:44 -080046#define MCPC_CTRL 0x30
David Brownell9ebd9612008-12-18 12:25:44 -080047#define MCPC_CTRL_RTSOL (1 << 7)
48#define MCPC_CTRL_EXTSWR (1 << 6)
49#define MCPC_CTRL_EXTSWC (1 << 5)
50#define MCPC_CTRL_VOICESW (1 << 4)
51#define MCPC_CTRL_OUT64K (1 << 3)
52#define MCPC_CTRL_RTSCTSSW (1 << 2)
53#define MCPC_CTRL_HS_UART (1 << 0)
54
55#define MCPC_IO_CTRL 0x33
David Brownell9ebd9612008-12-18 12:25:44 -080056#define MCPC_IO_CTRL_MICBIASEN (1 << 5)
57#define MCPC_IO_CTRL_CTS_NPU (1 << 4)
58#define MCPC_IO_CTRL_RXD_PU (1 << 3)
59#define MCPC_IO_CTRL_TXDTYP (1 << 2)
60#define MCPC_IO_CTRL_CTSTYP (1 << 1)
61#define MCPC_IO_CTRL_RTSTYP (1 << 0)
62
63#define MCPC_CTRL2 0x36
David Brownell9ebd9612008-12-18 12:25:44 -080064#define MCPC_CTRL2_MCPC_CK_EN (1 << 0)
65
66#define OTHER_FUNC_CTRL 0x80
David Brownell9ebd9612008-12-18 12:25:44 -080067#define OTHER_FUNC_CTRL_BDIS_ACON_EN (1 << 4)
68#define OTHER_FUNC_CTRL_FIVEWIRE_MODE (1 << 2)
69
70#define OTHER_IFC_CTRL 0x83
David Brownell9ebd9612008-12-18 12:25:44 -080071#define OTHER_IFC_CTRL_OE_INT_EN (1 << 6)
72#define OTHER_IFC_CTRL_CEA2011_MODE (1 << 5)
73#define OTHER_IFC_CTRL_FSLSSERIALMODE_4PIN (1 << 4)
74#define OTHER_IFC_CTRL_HIZ_ULPI_60MHZ_OUT (1 << 3)
75#define OTHER_IFC_CTRL_HIZ_ULPI (1 << 2)
76#define OTHER_IFC_CTRL_ALT_INT_REROUTE (1 << 0)
77
78#define OTHER_INT_EN_RISE 0x86
David Brownell9ebd9612008-12-18 12:25:44 -080079#define OTHER_INT_EN_FALL 0x89
David Brownell9ebd9612008-12-18 12:25:44 -080080#define OTHER_INT_STS 0x8C
81#define OTHER_INT_LATCH 0x8D
82#define OTHER_INT_VB_SESS_VLD (1 << 7)
83#define OTHER_INT_DM_HI (1 << 6) /* not valid for "latch" reg */
84#define OTHER_INT_DP_HI (1 << 5) /* not valid for "latch" reg */
85#define OTHER_INT_BDIS_ACON (1 << 3) /* not valid for "fall" regs */
86#define OTHER_INT_MANU (1 << 1)
87#define OTHER_INT_ABNORMAL_STRESS (1 << 0)
88
89#define ID_STATUS 0x96
90#define ID_RES_FLOAT (1 << 4)
91#define ID_RES_440K (1 << 3)
92#define ID_RES_200K (1 << 2)
93#define ID_RES_102K (1 << 1)
94#define ID_RES_GND (1 << 0)
95
96#define POWER_CTRL 0xAC
David Brownell9ebd9612008-12-18 12:25:44 -080097#define POWER_CTRL_OTG_ENAB (1 << 5)
98
99#define OTHER_IFC_CTRL2 0xAF
David Brownell9ebd9612008-12-18 12:25:44 -0800100#define OTHER_IFC_CTRL2_ULPI_STP_LOW (1 << 4)
101#define OTHER_IFC_CTRL2_ULPI_TXEN_POL (1 << 3)
102#define OTHER_IFC_CTRL2_ULPI_4PIN_2430 (1 << 2)
103#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_MASK (3 << 0) /* bits 0 and 1 */
104#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT1N (0 << 0)
105#define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT2N (1 << 0)
106
107#define REG_CTRL_EN 0xB2
David Brownell9ebd9612008-12-18 12:25:44 -0800108#define REG_CTRL_ERROR 0xB5
109#define ULPI_I2C_CONFLICT_INTEN (1 << 0)
110
111#define OTHER_FUNC_CTRL2 0xB8
David Brownell9ebd9612008-12-18 12:25:44 -0800112#define OTHER_FUNC_CTRL2_VBAT_TIMER_EN (1 << 0)
113
114/* following registers do not have separate _clr and _set registers */
115#define VBUS_DEBOUNCE 0xC0
116#define ID_DEBOUNCE 0xC1
117#define VBAT_TIMER 0xD3
118#define PHY_PWR_CTRL 0xFD
119#define PHY_PWR_PHYPWD (1 << 0)
120#define PHY_CLK_CTRL 0xFE
121#define PHY_CLK_CTRL_CLOCKGATING_EN (1 << 2)
122#define PHY_CLK_CTRL_CLK32K_EN (1 << 1)
123#define REQ_PHY_DPLL_CLK (1 << 0)
124#define PHY_CLK_CTRL_STS 0xFF
125#define PHY_DPLL_CLK (1 << 0)
126
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100127/* In module TWL_MODULE_PM_MASTER */
David Brownelldef6f8b2009-03-31 12:26:10 -0700128#define STS_HW_CONDITIONS 0x0F
David Brownell9ebd9612008-12-18 12:25:44 -0800129
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100130/* In module TWL_MODULE_PM_RECEIVER */
David Brownell9ebd9612008-12-18 12:25:44 -0800131#define VUSB_DEDICATED1 0x7D
132#define VUSB_DEDICATED2 0x7E
133#define VUSB1V5_DEV_GRP 0x71
134#define VUSB1V5_TYPE 0x72
135#define VUSB1V5_REMAP 0x73
136#define VUSB1V8_DEV_GRP 0x74
137#define VUSB1V8_TYPE 0x75
138#define VUSB1V8_REMAP 0x76
139#define VUSB3V1_DEV_GRP 0x77
140#define VUSB3V1_TYPE 0x78
141#define VUSB3V1_REMAP 0x79
142
143/* In module TWL4030_MODULE_INTBR */
144#define PMBR1 0x0D
145#define GPIO_USB_4PIN_ULPI_2430C (3 << 0)
146
NeilBrown56301df2015-04-16 18:03:04 +1000147/*
148 * If VBUS is valid or ID is ground, then we know a
149 * cable is present and we need to be runtime-enabled
150 */
Tony Lindgren80555552015-11-30 21:37:12 -0800151static inline bool cable_present(enum musb_vbus_id_status stat)
NeilBrown56301df2015-04-16 18:03:04 +1000152{
Tony Lindgren80555552015-11-30 21:37:12 -0800153 return stat == MUSB_VBUS_VALID ||
154 stat == MUSB_ID_GROUND;
NeilBrown56301df2015-04-16 18:03:04 +1000155}
156
David Brownell9ebd9612008-12-18 12:25:44 -0800157struct twl4030_usb {
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200158 struct usb_phy phy;
David Brownell9ebd9612008-12-18 12:25:44 -0800159 struct device *dev;
160
Jouni Hogander66760162009-02-20 14:02:31 +0200161 /* TWL4030 internal USB regulator supplies */
162 struct regulator *usb1v5;
163 struct regulator *usb1v8;
164 struct regulator *usb3v1;
165
David Brownell9ebd9612008-12-18 12:25:44 -0800166 /* for vbus reporting with irqs disabled */
Tony Lindgrendcc35b22014-08-27 16:28:11 -0700167 struct mutex lock;
David Brownell9ebd9612008-12-18 12:25:44 -0800168
169 /* pin configuration */
170 enum twl4030_usb_mode usb_mode;
171
172 int irq;
Tony Lindgren80555552015-11-30 21:37:12 -0800173 enum musb_vbus_id_status linkstat;
Matthias Kaehlckea87103a2011-04-01 23:02:07 +0200174 bool vbus_supplied;
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200175
176 struct delayed_work id_workaround_work;
David Brownell9ebd9612008-12-18 12:25:44 -0800177};
178
179/* internal define on top of container_of */
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200180#define phy_to_twl(x) container_of((x), struct twl4030_usb, phy)
David Brownell9ebd9612008-12-18 12:25:44 -0800181
182/*-------------------------------------------------------------------------*/
183
184static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl,
185 u8 module, u8 data, u8 address)
186{
187 u8 check;
188
Balaji T Kfc7b92f2009-12-13 21:23:33 +0100189 if ((twl_i2c_write_u8(module, data, address) >= 0) &&
190 (twl_i2c_read_u8(module, &check, address) >= 0) &&
David Brownell9ebd9612008-12-18 12:25:44 -0800191 (check == data))
192 return 0;
193 dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
194 1, module, address, check, data);
195
196 /* Failed once: Try again */
Balaji T Kfc7b92f2009-12-13 21:23:33 +0100197 if ((twl_i2c_write_u8(module, data, address) >= 0) &&
198 (twl_i2c_read_u8(module, &check, address) >= 0) &&
David Brownell9ebd9612008-12-18 12:25:44 -0800199 (check == data))
200 return 0;
201 dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
202 2, module, address, check, data);
203
204 /* Failed again: Return error */
205 return -EBUSY;
206}
207
208#define twl4030_usb_write_verify(twl, address, data) \
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100209 twl4030_i2c_write_u8_verify(twl, TWL_MODULE_USB, (data), (address))
David Brownell9ebd9612008-12-18 12:25:44 -0800210
211static inline int twl4030_usb_write(struct twl4030_usb *twl,
212 u8 address, u8 data)
213{
214 int ret = 0;
215
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100216 ret = twl_i2c_write_u8(TWL_MODULE_USB, data, address);
David Brownell9ebd9612008-12-18 12:25:44 -0800217 if (ret < 0)
218 dev_dbg(twl->dev,
219 "TWL4030:USB:Write[0x%x] Error %d\n", address, ret);
220 return ret;
221}
222
223static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address)
224{
225 u8 data;
226 int ret = 0;
227
Balaji T Kfc7b92f2009-12-13 21:23:33 +0100228 ret = twl_i2c_read_u8(module, &data, address);
David Brownell9ebd9612008-12-18 12:25:44 -0800229 if (ret >= 0)
230 ret = data;
231 else
232 dev_dbg(twl->dev,
233 "TWL4030:readb[0x%x,0x%x] Error %d\n",
234 module, address, ret);
235
236 return ret;
237}
238
239static inline int twl4030_usb_read(struct twl4030_usb *twl, u8 address)
240{
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100241 return twl4030_readb(twl, TWL_MODULE_USB, address);
David Brownell9ebd9612008-12-18 12:25:44 -0800242}
243
244/*-------------------------------------------------------------------------*/
245
246static inline int
247twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
248{
Heikki Krogerus92a6e6b2010-03-31 10:18:05 +0300249 return twl4030_usb_write(twl, ULPI_SET(reg), bits);
David Brownell9ebd9612008-12-18 12:25:44 -0800250}
251
252static inline int
253twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
254{
Heikki Krogerus92a6e6b2010-03-31 10:18:05 +0300255 return twl4030_usb_write(twl, ULPI_CLR(reg), bits);
David Brownell9ebd9612008-12-18 12:25:44 -0800256}
257
258/*-------------------------------------------------------------------------*/
259
Grazvydas Ignotasf65f4f42013-03-24 17:36:53 +0200260static bool twl4030_is_driving_vbus(struct twl4030_usb *twl)
261{
262 int ret;
263
264 ret = twl4030_usb_read(twl, PHY_CLK_CTRL_STS);
265 if (ret < 0 || !(ret & PHY_DPLL_CLK))
266 /*
267 * if clocks are off, registers are not updated,
268 * but we can assume we don't drive VBUS in this case
269 */
270 return false;
271
272 ret = twl4030_usb_read(twl, ULPI_OTG_CTRL);
273 if (ret < 0)
274 return false;
275
276 return (ret & (ULPI_OTG_DRVVBUS | ULPI_OTG_CHRGVBUS)) ? true : false;
277}
278
Tony Lindgren80555552015-11-30 21:37:12 -0800279static enum musb_vbus_id_status
Kishon Vijay Abraham Ic9721432012-06-22 17:40:52 +0530280 twl4030_usb_linkstat(struct twl4030_usb *twl)
David Brownell9ebd9612008-12-18 12:25:44 -0800281{
282 int status;
Tony Lindgren80555552015-11-30 21:37:12 -0800283 enum musb_vbus_id_status linkstat = MUSB_UNKNOWN;
David Brownell9ebd9612008-12-18 12:25:44 -0800284
Matthias Kaehlckea87103a2011-04-01 23:02:07 +0200285 twl->vbus_supplied = false;
286
David Brownelldef6f8b2009-03-31 12:26:10 -0700287 /*
288 * For ID/VBUS sensing, see manual section 15.4.8 ...
289 * except when using only battery backup power, two
290 * comparators produce VBUS_PRES and ID_PRES signals,
291 * which don't match docs elsewhere. But ... BIT(7)
292 * and BIT(2) of STS_HW_CONDITIONS, respectively, do
293 * seem to match up. If either is true the USB_PRES
294 * signal is active, the OTG module is activated, and
295 * its interrupt may be raised (may wake the system).
296 */
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100297 status = twl4030_readb(twl, TWL_MODULE_PM_MASTER, STS_HW_CONDITIONS);
David Brownell9ebd9612008-12-18 12:25:44 -0800298 if (status < 0)
299 dev_err(twl->dev, "USB link status err %d\n", status);
David Brownelldef6f8b2009-03-31 12:26:10 -0700300 else if (status & (BIT(7) | BIT(2))) {
Grazvydas Ignotasf65f4f42013-03-24 17:36:53 +0200301 if (status & BIT(7)) {
302 if (twl4030_is_driving_vbus(twl))
303 status &= ~BIT(7);
304 else
305 twl->vbus_supplied = true;
306 }
Matthias Kaehlckea87103a2011-04-01 23:02:07 +0200307
David Brownelldef6f8b2009-03-31 12:26:10 -0700308 if (status & BIT(2))
Tony Lindgren80555552015-11-30 21:37:12 -0800309 linkstat = MUSB_ID_GROUND;
Grazvydas Ignotasf65f4f42013-03-24 17:36:53 +0200310 else if (status & BIT(7))
Tony Lindgren80555552015-11-30 21:37:12 -0800311 linkstat = MUSB_VBUS_VALID;
Grazvydas Ignotasf65f4f42013-03-24 17:36:53 +0200312 else
Tony Lindgren80555552015-11-30 21:37:12 -0800313 linkstat = MUSB_VBUS_OFF;
Kishon Vijay Abraham Ic9721432012-06-22 17:40:52 +0530314 } else {
Tony Lindgren80555552015-11-30 21:37:12 -0800315 if (twl->linkstat != MUSB_UNKNOWN)
316 linkstat = MUSB_VBUS_OFF;
Kishon Vijay Abraham Ic9721432012-06-22 17:40:52 +0530317 }
David Brownell9ebd9612008-12-18 12:25:44 -0800318
319 dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
320 status, status, linkstat);
321
322 /* REVISIT this assumes host and peripheral controllers
323 * are registered, and that both are active...
324 */
325
David Brownell9ebd9612008-12-18 12:25:44 -0800326 return linkstat;
327}
328
329static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode)
330{
331 twl->usb_mode = mode;
332
333 switch (mode) {
334 case T2_USB_MODE_ULPI:
Heikki Krogerus92a6e6b2010-03-31 10:18:05 +0300335 twl4030_usb_clear_bits(twl, ULPI_IFC_CTRL,
336 ULPI_IFC_CTRL_CARKITMODE);
David Brownell9ebd9612008-12-18 12:25:44 -0800337 twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
Heikki Krogerus92a6e6b2010-03-31 10:18:05 +0300338 twl4030_usb_clear_bits(twl, ULPI_FUNC_CTRL,
339 ULPI_FUNC_CTRL_XCVRSEL_MASK |
340 ULPI_FUNC_CTRL_OPMODE_MASK);
David Brownell9ebd9612008-12-18 12:25:44 -0800341 break;
342 case -1:
343 /* FIXME: power on defaults */
344 break;
345 default:
346 dev_err(twl->dev, "unsupported T2 transceiver mode %d\n",
347 mode);
348 break;
Sachin Kamated093e62014-02-03 13:55:04 +0530349 }
David Brownell9ebd9612008-12-18 12:25:44 -0800350}
351
352static void twl4030_i2c_access(struct twl4030_usb *twl, int on)
353{
354 unsigned long timeout;
355 int val = twl4030_usb_read(twl, PHY_CLK_CTRL);
356
357 if (val >= 0) {
358 if (on) {
359 /* enable DPLL to access PHY registers over I2C */
360 val |= REQ_PHY_DPLL_CLK;
361 WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
362 (u8)val) < 0);
363
364 timeout = jiffies + HZ;
365 while (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
366 PHY_DPLL_CLK)
367 && time_before(jiffies, timeout))
368 udelay(10);
369 if (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
370 PHY_DPLL_CLK))
371 dev_err(twl->dev, "Timeout setting T2 HSUSB "
372 "PHY DPLL clock\n");
373 } else {
374 /* let ULPI control the DPLL clock */
375 val &= ~REQ_PHY_DPLL_CLK;
376 WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
377 (u8)val) < 0);
378 }
379 }
380}
381
Ming Leifc8f2a72010-09-06 23:27:09 +0800382static void __twl4030_phy_power(struct twl4030_usb *twl, int on)
383{
384 u8 pwr = twl4030_usb_read(twl, PHY_PWR_CTRL);
385
386 if (on)
387 pwr &= ~PHY_PWR_PHYPWD;
388 else
389 pwr |= PHY_PWR_PHYPWD;
390
391 WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
392}
393
Arnd Bergmann8073fb82016-03-02 16:24:08 +0100394static int __maybe_unused twl4030_usb_runtime_suspend(struct device *dev)
Kishon Vijay Abraham I6747caa2013-09-27 11:53:27 +0530395{
Tony Lindgren96be39a2014-08-20 12:07:00 -0700396 struct twl4030_usb *twl = dev_get_drvdata(dev);
Kishon Vijay Abraham I6747caa2013-09-27 11:53:27 +0530397
Tony Lindgren96be39a2014-08-20 12:07:00 -0700398 dev_dbg(twl->dev, "%s\n", __func__);
Kishon Vijay Abraham If1ddc24c92013-09-27 11:53:31 +0530399
Tony Lindgrenbad8e332014-08-27 16:28:09 -0700400 __twl4030_phy_power(twl, 0);
401 regulator_disable(twl->usb1v5);
402 regulator_disable(twl->usb1v8);
403 regulator_disable(twl->usb3v1);
Tony Lindgren96be39a2014-08-20 12:07:00 -0700404
Kishon Vijay Abraham I6747caa2013-09-27 11:53:27 +0530405 return 0;
406}
407
Arnd Bergmann8073fb82016-03-02 16:24:08 +0100408static int __maybe_unused twl4030_usb_runtime_resume(struct device *dev)
Ming Leifc8f2a72010-09-06 23:27:09 +0800409{
Tony Lindgren96be39a2014-08-20 12:07:00 -0700410 struct twl4030_usb *twl = dev_get_drvdata(dev);
Tony Lindgrenbad8e332014-08-27 16:28:09 -0700411 int res;
Tony Lindgren96be39a2014-08-20 12:07:00 -0700412
413 dev_dbg(twl->dev, "%s\n", __func__);
Tony Lindgren96be39a2014-08-20 12:07:00 -0700414
Tony Lindgrenbad8e332014-08-27 16:28:09 -0700415 res = regulator_enable(twl->usb3v1);
416 if (res)
417 dev_err(twl->dev, "Failed to enable usb3v1\n");
418
419 res = regulator_enable(twl->usb1v8);
420 if (res)
421 dev_err(twl->dev, "Failed to enable usb1v8\n");
422
423 /*
424 * Disabling usb3v1 regulator (= writing 0 to VUSB3V1_DEV_GRP
425 * in twl4030) resets the VUSB_DEDICATED2 register. This reset
426 * enables VUSB3V1_SLEEP bit that remaps usb3v1 ACTIVE state to
427 * SLEEP. We work around this by clearing the bit after usv3v1
428 * is re-activated. This ensures that VUSB3V1 is really active.
429 */
430 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);
431
432 res = regulator_enable(twl->usb1v5);
433 if (res)
434 dev_err(twl->dev, "Failed to enable usb1v5\n");
435
436 __twl4030_phy_power(twl, 1);
437 twl4030_usb_write(twl, PHY_CLK_CTRL,
438 twl4030_usb_read(twl, PHY_CLK_CTRL) |
439 (PHY_CLK_CTRL_CLOCKGATING_EN |
440 PHY_CLK_CTRL_CLK32K_EN));
Tony Lindgren96be39a2014-08-20 12:07:00 -0700441
442 return 0;
443}
444
445static int twl4030_phy_power_off(struct phy *phy)
446{
447 struct twl4030_usb *twl = phy_get_drvdata(phy);
448
449 dev_dbg(twl->dev, "%s\n", __func__);
450 pm_runtime_mark_last_busy(twl->dev);
451 pm_runtime_put_autosuspend(twl->dev);
452
453 return 0;
David Brownell9ebd9612008-12-18 12:25:44 -0800454}
455
Kishon Vijay Abraham If1ddc24c92013-09-27 11:53:31 +0530456static int twl4030_phy_power_on(struct phy *phy)
David Brownell9ebd9612008-12-18 12:25:44 -0800457{
Kishon Vijay Abraham If1ddc24c92013-09-27 11:53:31 +0530458 struct twl4030_usb *twl = phy_get_drvdata(phy);
459
Ming Leifc8f2a72010-09-06 23:27:09 +0800460 dev_dbg(twl->dev, "%s\n", __func__);
Tony Lindgren96be39a2014-08-20 12:07:00 -0700461 pm_runtime_get_sync(twl->dev);
462 twl4030_i2c_access(twl, 1);
463 twl4030_usb_set_mode(twl, twl->usb_mode);
464 if (twl->usb_mode == T2_USB_MODE_ULPI)
465 twl4030_i2c_access(twl, 0);
Tony Lindgren62dc5762014-08-27 16:28:08 -0700466 schedule_delayed_work(&twl->id_workaround_work, 0);
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200467
Kishon Vijay Abraham I6747caa2013-09-27 11:53:27 +0530468 return 0;
469}
470
Jouni Hogander66760162009-02-20 14:02:31 +0200471static int twl4030_usb_ldo_init(struct twl4030_usb *twl)
David Brownell9ebd9612008-12-18 12:25:44 -0800472{
473 /* Enable writing to power configuration registers */
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100474 twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
475 TWL4030_PM_MASTER_PROTECT_KEY);
Felipe Balbie7944d82010-08-18 09:19:37 +0300476
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100477 twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
478 TWL4030_PM_MASTER_PROTECT_KEY);
David Brownell9ebd9612008-12-18 12:25:44 -0800479
Ming Leifc8f2a72010-09-06 23:27:09 +0800480 /* Keep VUSB3V1 LDO in sleep state until VBUS/ID change detected*/
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100481 /*twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);*/
David Brownell9ebd9612008-12-18 12:25:44 -0800482
483 /* input to VUSB3V1 LDO is from VBAT, not VBUS */
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100484 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1);
David Brownell9ebd9612008-12-18 12:25:44 -0800485
Jouni Hogander66760162009-02-20 14:02:31 +0200486 /* Initialize 3.1V regulator */
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100487 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP);
Jouni Hogander66760162009-02-20 14:02:31 +0200488
Kishon Vijay Abraham I91669022013-03-15 18:58:51 +0530489 twl->usb3v1 = devm_regulator_get(twl->dev, "usb3v1");
Jouni Hogander66760162009-02-20 14:02:31 +0200490 if (IS_ERR(twl->usb3v1))
491 return -ENODEV;
492
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100493 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE);
David Brownell9ebd9612008-12-18 12:25:44 -0800494
Jouni Hogander66760162009-02-20 14:02:31 +0200495 /* Initialize 1.5V regulator */
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100496 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP);
Jouni Hogander66760162009-02-20 14:02:31 +0200497
Kishon Vijay Abraham I91669022013-03-15 18:58:51 +0530498 twl->usb1v5 = devm_regulator_get(twl->dev, "usb1v5");
Jouni Hogander66760162009-02-20 14:02:31 +0200499 if (IS_ERR(twl->usb1v5))
Kishon Vijay Abraham I91669022013-03-15 18:58:51 +0530500 return -ENODEV;
Jouni Hogander66760162009-02-20 14:02:31 +0200501
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100502 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE);
David Brownell9ebd9612008-12-18 12:25:44 -0800503
Jouni Hogander66760162009-02-20 14:02:31 +0200504 /* Initialize 1.8V regulator */
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100505 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP);
Jouni Hogander66760162009-02-20 14:02:31 +0200506
Kishon Vijay Abraham I91669022013-03-15 18:58:51 +0530507 twl->usb1v8 = devm_regulator_get(twl->dev, "usb1v8");
Jouni Hogander66760162009-02-20 14:02:31 +0200508 if (IS_ERR(twl->usb1v8))
Kishon Vijay Abraham I91669022013-03-15 18:58:51 +0530509 return -ENODEV;
Jouni Hogander66760162009-02-20 14:02:31 +0200510
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100511 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE);
David Brownell9ebd9612008-12-18 12:25:44 -0800512
513 /* disable access to power configuration registers */
Peter Ujfalusi9d94e162012-11-13 10:43:38 +0100514 twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
515 TWL4030_PM_MASTER_PROTECT_KEY);
Jouni Hogander66760162009-02-20 14:02:31 +0200516
517 return 0;
David Brownell9ebd9612008-12-18 12:25:44 -0800518}
519
520static ssize_t twl4030_usb_vbus_show(struct device *dev,
521 struct device_attribute *attr, char *buf)
522{
523 struct twl4030_usb *twl = dev_get_drvdata(dev);
David Brownell9ebd9612008-12-18 12:25:44 -0800524 int ret = -EINVAL;
525
Tony Lindgrendcc35b22014-08-27 16:28:11 -0700526 mutex_lock(&twl->lock);
David Brownell9ebd9612008-12-18 12:25:44 -0800527 ret = sprintf(buf, "%s\n",
Matthias Kaehlckea87103a2011-04-01 23:02:07 +0200528 twl->vbus_supplied ? "on" : "off");
Tony Lindgrendcc35b22014-08-27 16:28:11 -0700529 mutex_unlock(&twl->lock);
David Brownell9ebd9612008-12-18 12:25:44 -0800530
531 return ret;
532}
533static DEVICE_ATTR(vbus, 0444, twl4030_usb_vbus_show, NULL);
534
535static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
536{
537 struct twl4030_usb *twl = _twl;
Tony Lindgren80555552015-11-30 21:37:12 -0800538 enum musb_vbus_id_status status;
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200539 bool status_changed = false;
David Brownell9ebd9612008-12-18 12:25:44 -0800540
David Brownell9ebd9612008-12-18 12:25:44 -0800541 status = twl4030_usb_linkstat(twl);
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200542
Tony Lindgrendcc35b22014-08-27 16:28:11 -0700543 mutex_lock(&twl->lock);
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200544 if (status >= 0 && status != twl->linkstat) {
NeilBrown56301df2015-04-16 18:03:04 +1000545 status_changed =
546 cable_present(twl->linkstat) !=
547 cable_present(status);
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200548 twl->linkstat = status;
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200549 }
Tony Lindgrendcc35b22014-08-27 16:28:11 -0700550 mutex_unlock(&twl->lock);
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200551
552 if (status_changed) {
David Brownell9ebd9612008-12-18 12:25:44 -0800553 /* FIXME add a set_power() method so that B-devices can
554 * configure the charger appropriately. It's not always
555 * correct to consume VBUS power, and how much current to
556 * consume is a function of the USB configuration chosen
557 * by the host.
558 *
559 * REVISIT usb_gadget_vbus_connect(...) as needed, ditto
560 * its disconnect() sibling, when changing to/from the
561 * USB_LINK_VBUS state. musb_hdrc won't care until it
562 * starts to handle softconnect right.
563 */
NeilBrown56301df2015-04-16 18:03:04 +1000564 if (cable_present(status)) {
565 pm_runtime_get_sync(twl->dev);
Tony Lindgren96be39a2014-08-20 12:07:00 -0700566 } else {
NeilBrown56301df2015-04-16 18:03:04 +1000567 pm_runtime_mark_last_busy(twl->dev);
568 pm_runtime_put_autosuspend(twl->dev);
Tony Lindgren96be39a2014-08-20 12:07:00 -0700569 }
Tony Lindgren80555552015-11-30 21:37:12 -0800570 musb_mailbox(status);
David Brownell9ebd9612008-12-18 12:25:44 -0800571 }
Tony Lindgren85601b82014-08-24 17:44:22 +0530572
573 /* don't schedule during sleep - irq works right then */
Tony Lindgren80555552015-11-30 21:37:12 -0800574 if (status == MUSB_ID_GROUND && pm_runtime_active(twl->dev)) {
Tony Lindgren85601b82014-08-24 17:44:22 +0530575 cancel_delayed_work(&twl->id_workaround_work);
576 schedule_delayed_work(&twl->id_workaround_work, HZ);
577 }
578
579 if (irq)
580 sysfs_notify(&twl->dev->kobj, NULL, "vbus");
David Brownell9ebd9612008-12-18 12:25:44 -0800581
582 return IRQ_HANDLED;
583}
584
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200585static void twl4030_id_workaround_work(struct work_struct *work)
Ming Leifc8f2a72010-09-06 23:27:09 +0800586{
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200587 struct twl4030_usb *twl = container_of(work, struct twl4030_usb,
588 id_workaround_work.work);
Ming Leifc8f2a72010-09-06 23:27:09 +0800589
Tony Lindgren85601b82014-08-24 17:44:22 +0530590 twl4030_usb_irq(0, twl);
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200591}
592
Kishon Vijay Abraham If1ddc24c92013-09-27 11:53:31 +0530593static int twl4030_phy_init(struct phy *phy)
Ming Leifc8f2a72010-09-06 23:27:09 +0800594{
Kishon Vijay Abraham If1ddc24c92013-09-27 11:53:31 +0530595 struct twl4030_usb *twl = phy_get_drvdata(phy);
Ming Leifc8f2a72010-09-06 23:27:09 +0800596
Tony Lindgren96be39a2014-08-20 12:07:00 -0700597 pm_runtime_get_sync(twl->dev);
Tony Lindgren62dc5762014-08-27 16:28:08 -0700598 schedule_delayed_work(&twl->id_workaround_work, 0);
Tony Lindgren96be39a2014-08-20 12:07:00 -0700599 pm_runtime_mark_last_busy(twl->dev);
600 pm_runtime_put_autosuspend(twl->dev);
601
Kishon Vijay Abraham I817e5f32013-03-15 18:58:52 +0530602 return 0;
Ming Leifc8f2a72010-09-06 23:27:09 +0800603}
604
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200605static int twl4030_set_peripheral(struct usb_otg *otg,
606 struct usb_gadget *gadget)
David Brownell9ebd9612008-12-18 12:25:44 -0800607{
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200608 if (!otg)
David Brownell9ebd9612008-12-18 12:25:44 -0800609 return -ENODEV;
610
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200611 otg->gadget = gadget;
David Brownell9ebd9612008-12-18 12:25:44 -0800612 if (!gadget)
Felipe Balbi8b9ca272014-11-07 09:06:04 -0600613 otg->state = OTG_STATE_UNDEFINED;
David Brownell9ebd9612008-12-18 12:25:44 -0800614
615 return 0;
616}
617
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200618static int twl4030_set_host(struct usb_otg *otg, struct usb_bus *host)
David Brownell9ebd9612008-12-18 12:25:44 -0800619{
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200620 if (!otg)
David Brownell9ebd9612008-12-18 12:25:44 -0800621 return -ENODEV;
622
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200623 otg->host = host;
David Brownell9ebd9612008-12-18 12:25:44 -0800624 if (!host)
Felipe Balbi8b9ca272014-11-07 09:06:04 -0600625 otg->state = OTG_STATE_UNDEFINED;
David Brownell9ebd9612008-12-18 12:25:44 -0800626
627 return 0;
628}
629
Kishon Vijay Abraham I6747caa2013-09-27 11:53:27 +0530630static const struct phy_ops ops = {
631 .init = twl4030_phy_init,
632 .power_on = twl4030_phy_power_on,
633 .power_off = twl4030_phy_power_off,
634 .owner = THIS_MODULE,
635};
636
Tony Lindgren96be39a2014-08-20 12:07:00 -0700637static const struct dev_pm_ops twl4030_usb_pm_ops = {
638 SET_RUNTIME_PM_OPS(twl4030_usb_runtime_suspend,
639 twl4030_usb_runtime_resume, NULL)
640};
641
Bill Pemberton41ac7b32012-11-19 13:21:48 -0500642static int twl4030_usb_probe(struct platform_device *pdev)
David Brownell9ebd9612008-12-18 12:25:44 -0800643{
Jingoo Han19f9e182013-07-30 17:02:13 +0900644 struct twl4030_usb_data *pdata = dev_get_platdata(&pdev->dev);
David Brownell9ebd9612008-12-18 12:25:44 -0800645 struct twl4030_usb *twl;
Kishon Vijay Abraham I6747caa2013-09-27 11:53:27 +0530646 struct phy *phy;
Jouni Hogander66760162009-02-20 14:02:31 +0200647 int status, err;
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200648 struct usb_otg *otg;
Kishon Vijay Abraham If8515f02012-09-06 20:27:09 +0530649 struct device_node *np = pdev->dev.of_node;
Kishon Vijay Abraham I6747caa2013-09-27 11:53:27 +0530650 struct phy_provider *phy_provider;
David Brownell9ebd9612008-12-18 12:25:44 -0800651
Sachin Kamatb6d790f2014-02-03 13:55:03 +0530652 twl = devm_kzalloc(&pdev->dev, sizeof(*twl), GFP_KERNEL);
David Brownell9ebd9612008-12-18 12:25:44 -0800653 if (!twl)
654 return -ENOMEM;
655
Kishon Vijay Abraham If8515f02012-09-06 20:27:09 +0530656 if (np)
657 of_property_read_u32(np, "usb_mode",
658 (enum twl4030_usb_mode *)&twl->usb_mode);
Kishon Vijay Abraham I6747caa2013-09-27 11:53:27 +0530659 else if (pdata) {
Kishon Vijay Abraham If8515f02012-09-06 20:27:09 +0530660 twl->usb_mode = pdata->usb_mode;
Kishon Vijay Abraham I6747caa2013-09-27 11:53:27 +0530661 } else {
Kishon Vijay Abraham If8515f02012-09-06 20:27:09 +0530662 dev_err(&pdev->dev, "twl4030 initialized without pdata\n");
663 return -EINVAL;
664 }
665
Sachin Kamatb6d790f2014-02-03 13:55:03 +0530666 otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
Kishon Vijay Abraham Ib8a3efa2012-06-22 17:40:55 +0530667 if (!otg)
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200668 return -ENOMEM;
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200669
David Brownell9ebd9612008-12-18 12:25:44 -0800670 twl->dev = &pdev->dev;
671 twl->irq = platform_get_irq(pdev, 0);
Matthias Kaehlckea87103a2011-04-01 23:02:07 +0200672 twl->vbus_supplied = false;
Tony Lindgren80555552015-11-30 21:37:12 -0800673 twl->linkstat = MUSB_UNKNOWN;
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200674
675 twl->phy.dev = twl->dev;
676 twl->phy.label = "twl4030";
677 twl->phy.otg = otg;
Kishon Vijay Abraham Ic11747f2013-01-25 08:03:24 +0530678 twl->phy.type = USB_PHY_TYPE_USB2;
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200679
Felipe Balbi8b9ca272014-11-07 09:06:04 -0600680 otg->usb_phy = &twl->phy;
Heikki Krogerus74d4aa42012-02-13 13:24:11 +0200681 otg->set_host = twl4030_set_host;
682 otg->set_peripheral = twl4030_set_peripheral;
David Brownell9ebd9612008-12-18 12:25:44 -0800683
Heikki Krogerusdbc98632014-11-19 17:28:21 +0200684 phy = devm_phy_create(twl->dev, NULL, &ops);
Kishon Vijay Abraham I6747caa2013-09-27 11:53:27 +0530685 if (IS_ERR(phy)) {
686 dev_dbg(&pdev->dev, "Failed to create PHY\n");
687 return PTR_ERR(phy);
688 }
689
690 phy_set_drvdata(phy, twl);
691
Kishon Vijay Abraham I64fe1892014-02-17 14:29:25 +0530692 phy_provider = devm_of_phy_provider_register(twl->dev,
693 of_phy_simple_xlate);
694 if (IS_ERR(phy_provider))
695 return PTR_ERR(phy_provider);
696
Tony Lindgrendcc35b22014-08-27 16:28:11 -0700697 /* init mutex for workqueue */
698 mutex_init(&twl->lock);
David Brownell9ebd9612008-12-18 12:25:44 -0800699
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200700 INIT_DELAYED_WORK(&twl->id_workaround_work, twl4030_id_workaround_work);
701
Jouni Hogander66760162009-02-20 14:02:31 +0200702 err = twl4030_usb_ldo_init(twl);
703 if (err) {
704 dev_err(&pdev->dev, "ldo init failed\n");
Jouni Hogander66760162009-02-20 14:02:31 +0200705 return err;
706 }
Kishon Vijay Abraham Ic11747f2013-01-25 08:03:24 +0530707 usb_add_phy_dev(&twl->phy);
David Brownell9ebd9612008-12-18 12:25:44 -0800708
709 platform_set_drvdata(pdev, twl);
710 if (device_create_file(&pdev->dev, &dev_attr_vbus))
711 dev_warn(&pdev->dev, "could not create sysfs file\n");
712
Pali Rohár80d2e762013-09-18 19:03:33 +0200713 ATOMIC_INIT_NOTIFIER_HEAD(&twl->phy.notifier);
714
Tony Lindgren96be39a2014-08-20 12:07:00 -0700715 pm_runtime_use_autosuspend(&pdev->dev);
716 pm_runtime_set_autosuspend_delay(&pdev->dev, 2000);
717 pm_runtime_enable(&pdev->dev);
Tony Lindgren58a66db2015-11-30 21:39:54 -0800718 pm_runtime_get_sync(&pdev->dev);
Tony Lindgren96be39a2014-08-20 12:07:00 -0700719
David Brownell9ebd9612008-12-18 12:25:44 -0800720 /* Our job is to use irqs and status from the power module
721 * to keep the transceiver disabled when nothing's connected.
722 *
723 * FIXME we actually shouldn't start enabling it until the
724 * USB controller drivers have said they're ready, by calling
725 * set_host() and/or set_peripheral() ... OTG_capable boards
726 * need both handles, otherwise just one suffices.
727 */
Kishon Vijay Abraham I91669022013-03-15 18:58:51 +0530728 status = devm_request_threaded_irq(twl->dev, twl->irq, NULL,
729 twl4030_usb_irq, IRQF_TRIGGER_FALLING |
730 IRQF_TRIGGER_RISING | IRQF_ONESHOT, "twl4030_usb", twl);
David Brownell9ebd9612008-12-18 12:25:44 -0800731 if (status < 0) {
732 dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n",
733 twl->irq, status);
David Brownell9ebd9612008-12-18 12:25:44 -0800734 return status;
735 }
736
Heikki Krogerus61211b12014-11-19 17:28:19 +0200737 if (pdata)
738 err = phy_create_lookup(phy, "usb", "musb-hdrc.0");
739 if (err)
740 return err;
741
Tony Lindgren96be39a2014-08-20 12:07:00 -0700742 pm_runtime_mark_last_busy(&pdev->dev);
743 pm_runtime_put_autosuspend(twl->dev);
744
David Brownell9ebd9612008-12-18 12:25:44 -0800745 dev_info(&pdev->dev, "Initialized TWL4030 USB module\n");
746 return 0;
747}
748
Dmitry Torokhov39d35682013-02-24 00:55:07 -0800749static int twl4030_usb_remove(struct platform_device *pdev)
David Brownell9ebd9612008-12-18 12:25:44 -0800750{
751 struct twl4030_usb *twl = platform_get_drvdata(pdev);
752 int val;
753
Tony Lindgrenb241d312015-11-30 21:39:53 -0800754 usb_remove_phy(&twl->phy);
Tony Lindgren96be39a2014-08-20 12:07:00 -0700755 pm_runtime_get_sync(twl->dev);
Grazvydas Ignotas249751f2013-03-17 20:23:24 +0200756 cancel_delayed_work(&twl->id_workaround_work);
David Brownell9ebd9612008-12-18 12:25:44 -0800757 device_remove_file(twl->dev, &dev_attr_vbus);
758
759 /* set transceiver mode to power on defaults */
760 twl4030_usb_set_mode(twl, -1);
761
Tony Lindgren58a66db2015-11-30 21:39:54 -0800762 /* idle ulpi before powering off */
763 if (cable_present(twl->linkstat))
764 pm_runtime_put_noidle(twl->dev);
765 pm_runtime_mark_last_busy(twl->dev);
766 pm_runtime_put_sync_suspend(twl->dev);
767 pm_runtime_disable(twl->dev);
768
David Brownell9ebd9612008-12-18 12:25:44 -0800769 /* autogate 60MHz ULPI clock,
770 * clear dpll clock request for i2c access,
771 * disable 32KHz
772 */
773 val = twl4030_usb_read(twl, PHY_CLK_CTRL);
774 if (val >= 0) {
775 val |= PHY_CLK_CTRL_CLOCKGATING_EN;
776 val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK);
777 twl4030_usb_write(twl, PHY_CLK_CTRL, (u8)val);
778 }
779
780 /* disable complete OTG block */
781 twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
NeilBrown56301df2015-04-16 18:03:04 +1000782
David Brownell9ebd9612008-12-18 12:25:44 -0800783 return 0;
784}
785
Kishon Vijay Abraham If8515f02012-09-06 20:27:09 +0530786#ifdef CONFIG_OF
787static const struct of_device_id twl4030_usb_id_table[] = {
788 { .compatible = "ti,twl4030-usb" },
789 {}
790};
791MODULE_DEVICE_TABLE(of, twl4030_usb_id_table);
792#endif
793
David Brownell9ebd9612008-12-18 12:25:44 -0800794static struct platform_driver twl4030_usb_driver = {
795 .probe = twl4030_usb_probe,
Dmitry Torokhov39d35682013-02-24 00:55:07 -0800796 .remove = twl4030_usb_remove,
David Brownell9ebd9612008-12-18 12:25:44 -0800797 .driver = {
798 .name = "twl4030_usb",
Tony Lindgren96be39a2014-08-20 12:07:00 -0700799 .pm = &twl4030_usb_pm_ops,
Kishon Vijay Abraham If8515f02012-09-06 20:27:09 +0530800 .of_match_table = of_match_ptr(twl4030_usb_id_table),
David Brownell9ebd9612008-12-18 12:25:44 -0800801 },
802};
803
804static int __init twl4030_usb_init(void)
805{
806 return platform_driver_register(&twl4030_usb_driver);
807}
808subsys_initcall(twl4030_usb_init);
809
810static void __exit twl4030_usb_exit(void)
811{
812 platform_driver_unregister(&twl4030_usb_driver);
813}
814module_exit(twl4030_usb_exit);
815
816MODULE_ALIAS("platform:twl4030_usb");
817MODULE_AUTHOR("Texas Instruments, Inc, Nokia Corporation");
818MODULE_DESCRIPTION("TWL4030 USB transceiver driver");
819MODULE_LICENSE("GPL");