2 * twl4030_usb - TWL4030 USB transceiver, talking to OMAP OTG controller
4 * Copyright (C) 2004-2007 Texas Instruments
5 * Copyright (C) 2008 Nokia Corporation
6 * Contact: Felipe Balbi <felipe.balbi@nokia.com>
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.
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.
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.
23 * - HS USB ULPI mode works.
24 * - 3-pin mode support may be added in future.
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/interrupt.h>
30 #include <linux/platform_device.h>
31 #include <linux/spinlock.h>
32 #include <linux/workqueue.h>
34 #include <linux/delay.h>
35 #include <linux/usb/otg.h>
36 #include <linux/i2c/twl4030.h>
37 #include <linux/regulator/consumer.h>
38 #include <linux/err.h>
41 /* Register defines */
43 #define VENDOR_ID_LO 0x00
44 #define VENDOR_ID_HI 0x01
45 #define PRODUCT_ID_LO 0x02
46 #define PRODUCT_ID_HI 0x03
48 #define FUNC_CTRL 0x04
49 #define FUNC_CTRL_SET 0x05
50 #define FUNC_CTRL_CLR 0x06
51 #define FUNC_CTRL_SUSPENDM (1 << 6)
52 #define FUNC_CTRL_RESET (1 << 5)
53 #define FUNC_CTRL_OPMODE_MASK (3 << 3) /* bits 3 and 4 */
54 #define FUNC_CTRL_OPMODE_NORMAL (0 << 3)
55 #define FUNC_CTRL_OPMODE_NONDRIVING (1 << 3)
56 #define FUNC_CTRL_OPMODE_DISABLE_BIT_NRZI (2 << 3)
57 #define FUNC_CTRL_TERMSELECT (1 << 2)
58 #define FUNC_CTRL_XCVRSELECT_MASK (3 << 0) /* bits 0 and 1 */
59 #define FUNC_CTRL_XCVRSELECT_HS (0 << 0)
60 #define FUNC_CTRL_XCVRSELECT_FS (1 << 0)
61 #define FUNC_CTRL_XCVRSELECT_LS (2 << 0)
62 #define FUNC_CTRL_XCVRSELECT_FS4LS (3 << 0)
65 #define IFC_CTRL_SET 0x08
66 #define IFC_CTRL_CLR 0x09
67 #define IFC_CTRL_INTERFACE_PROTECT_DISABLE (1 << 7)
68 #define IFC_CTRL_AUTORESUME (1 << 4)
69 #define IFC_CTRL_CLOCKSUSPENDM (1 << 3)
70 #define IFC_CTRL_CARKITMODE (1 << 2)
71 #define IFC_CTRL_FSLSSERIALMODE_3PIN (1 << 1)
73 #define TWL4030_OTG_CTRL 0x0A
74 #define TWL4030_OTG_CTRL_SET 0x0B
75 #define TWL4030_OTG_CTRL_CLR 0x0C
76 #define TWL4030_OTG_CTRL_DRVVBUS (1 << 5)
77 #define TWL4030_OTG_CTRL_CHRGVBUS (1 << 4)
78 #define TWL4030_OTG_CTRL_DISCHRGVBUS (1 << 3)
79 #define TWL4030_OTG_CTRL_DMPULLDOWN (1 << 2)
80 #define TWL4030_OTG_CTRL_DPPULLDOWN (1 << 1)
81 #define TWL4030_OTG_CTRL_IDPULLUP (1 << 0)
83 #define USB_INT_EN_RISE 0x0D
84 #define USB_INT_EN_RISE_SET 0x0E
85 #define USB_INT_EN_RISE_CLR 0x0F
86 #define USB_INT_EN_FALL 0x10
87 #define USB_INT_EN_FALL_SET 0x11
88 #define USB_INT_EN_FALL_CLR 0x12
89 #define USB_INT_STS 0x13
90 #define USB_INT_LATCH 0x14
91 #define USB_INT_IDGND (1 << 4)
92 #define USB_INT_SESSEND (1 << 3)
93 #define USB_INT_SESSVALID (1 << 2)
94 #define USB_INT_VBUSVALID (1 << 1)
95 #define USB_INT_HOSTDISCONNECT (1 << 0)
97 #define CARKIT_CTRL 0x19
98 #define CARKIT_CTRL_SET 0x1A
99 #define CARKIT_CTRL_CLR 0x1B
100 #define CARKIT_CTRL_MICEN (1 << 6)
101 #define CARKIT_CTRL_SPKRIGHTEN (1 << 5)
102 #define CARKIT_CTRL_SPKLEFTEN (1 << 4)
103 #define CARKIT_CTRL_RXDEN (1 << 3)
104 #define CARKIT_CTRL_TXDEN (1 << 2)
105 #define CARKIT_CTRL_IDGNDDRV (1 << 1)
106 #define CARKIT_CTRL_CARKITPWR (1 << 0)
107 #define CARKIT_PLS_CTRL 0x22
108 #define CARKIT_PLS_CTRL_SET 0x23
109 #define CARKIT_PLS_CTRL_CLR 0x24
110 #define CARKIT_PLS_CTRL_SPKRRIGHT_BIASEN (1 << 3)
111 #define CARKIT_PLS_CTRL_SPKRLEFT_BIASEN (1 << 2)
112 #define CARKIT_PLS_CTRL_RXPLSEN (1 << 1)
113 #define CARKIT_PLS_CTRL_TXPLSEN (1 << 0)
115 #define MCPC_CTRL 0x30
116 #define MCPC_CTRL_SET 0x31
117 #define MCPC_CTRL_CLR 0x32
118 #define MCPC_CTRL_RTSOL (1 << 7)
119 #define MCPC_CTRL_EXTSWR (1 << 6)
120 #define MCPC_CTRL_EXTSWC (1 << 5)
121 #define MCPC_CTRL_VOICESW (1 << 4)
122 #define MCPC_CTRL_OUT64K (1 << 3)
123 #define MCPC_CTRL_RTSCTSSW (1 << 2)
124 #define MCPC_CTRL_HS_UART (1 << 0)
126 #define MCPC_IO_CTRL 0x33
127 #define MCPC_IO_CTRL_SET 0x34
128 #define MCPC_IO_CTRL_CLR 0x35
129 #define MCPC_IO_CTRL_MICBIASEN (1 << 5)
130 #define MCPC_IO_CTRL_CTS_NPU (1 << 4)
131 #define MCPC_IO_CTRL_RXD_PU (1 << 3)
132 #define MCPC_IO_CTRL_TXDTYP (1 << 2)
133 #define MCPC_IO_CTRL_CTSTYP (1 << 1)
134 #define MCPC_IO_CTRL_RTSTYP (1 << 0)
136 #define MCPC_CTRL2 0x36
137 #define MCPC_CTRL2_SET 0x37
138 #define MCPC_CTRL2_CLR 0x38
139 #define MCPC_CTRL2_MCPC_CK_EN (1 << 0)
141 #define OTHER_FUNC_CTRL 0x80
142 #define OTHER_FUNC_CTRL_SET 0x81
143 #define OTHER_FUNC_CTRL_CLR 0x82
144 #define OTHER_FUNC_CTRL_BDIS_ACON_EN (1 << 4)
145 #define OTHER_FUNC_CTRL_FIVEWIRE_MODE (1 << 2)
147 #define OTHER_IFC_CTRL 0x83
148 #define OTHER_IFC_CTRL_SET 0x84
149 #define OTHER_IFC_CTRL_CLR 0x85
150 #define OTHER_IFC_CTRL_OE_INT_EN (1 << 6)
151 #define OTHER_IFC_CTRL_CEA2011_MODE (1 << 5)
152 #define OTHER_IFC_CTRL_FSLSSERIALMODE_4PIN (1 << 4)
153 #define OTHER_IFC_CTRL_HIZ_ULPI_60MHZ_OUT (1 << 3)
154 #define OTHER_IFC_CTRL_HIZ_ULPI (1 << 2)
155 #define OTHER_IFC_CTRL_ALT_INT_REROUTE (1 << 0)
157 #define OTHER_INT_EN_RISE 0x86
158 #define OTHER_INT_EN_RISE_SET 0x87
159 #define OTHER_INT_EN_RISE_CLR 0x88
160 #define OTHER_INT_EN_FALL 0x89
161 #define OTHER_INT_EN_FALL_SET 0x8A
162 #define OTHER_INT_EN_FALL_CLR 0x8B
163 #define OTHER_INT_STS 0x8C
164 #define OTHER_INT_LATCH 0x8D
165 #define OTHER_INT_VB_SESS_VLD (1 << 7)
166 #define OTHER_INT_DM_HI (1 << 6) /* not valid for "latch" reg */
167 #define OTHER_INT_DP_HI (1 << 5) /* not valid for "latch" reg */
168 #define OTHER_INT_BDIS_ACON (1 << 3) /* not valid for "fall" regs */
169 #define OTHER_INT_MANU (1 << 1)
170 #define OTHER_INT_ABNORMAL_STRESS (1 << 0)
172 #define ID_STATUS 0x96
173 #define ID_RES_FLOAT (1 << 4)
174 #define ID_RES_440K (1 << 3)
175 #define ID_RES_200K (1 << 2)
176 #define ID_RES_102K (1 << 1)
177 #define ID_RES_GND (1 << 0)
179 #define POWER_CTRL 0xAC
180 #define POWER_CTRL_SET 0xAD
181 #define POWER_CTRL_CLR 0xAE
182 #define POWER_CTRL_OTG_ENAB (1 << 5)
184 #define OTHER_IFC_CTRL2 0xAF
185 #define OTHER_IFC_CTRL2_SET 0xB0
186 #define OTHER_IFC_CTRL2_CLR 0xB1
187 #define OTHER_IFC_CTRL2_ULPI_STP_LOW (1 << 4)
188 #define OTHER_IFC_CTRL2_ULPI_TXEN_POL (1 << 3)
189 #define OTHER_IFC_CTRL2_ULPI_4PIN_2430 (1 << 2)
190 #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_MASK (3 << 0) /* bits 0 and 1 */
191 #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT1N (0 << 0)
192 #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT2N (1 << 0)
194 #define REG_CTRL_EN 0xB2
195 #define REG_CTRL_EN_SET 0xB3
196 #define REG_CTRL_EN_CLR 0xB4
197 #define REG_CTRL_ERROR 0xB5
198 #define ULPI_I2C_CONFLICT_INTEN (1 << 0)
200 #define OTHER_FUNC_CTRL2 0xB8
201 #define OTHER_FUNC_CTRL2_SET 0xB9
202 #define OTHER_FUNC_CTRL2_CLR 0xBA
203 #define OTHER_FUNC_CTRL2_VBAT_TIMER_EN (1 << 0)
205 /* following registers do not have separate _clr and _set registers */
206 #define VBUS_DEBOUNCE 0xC0
207 #define ID_DEBOUNCE 0xC1
208 #define VBAT_TIMER 0xD3
209 #define PHY_PWR_CTRL 0xFD
210 #define PHY_PWR_PHYPWD (1 << 0)
211 #define PHY_CLK_CTRL 0xFE
212 #define PHY_CLK_CTRL_CLOCKGATING_EN (1 << 2)
213 #define PHY_CLK_CTRL_CLK32K_EN (1 << 1)
214 #define REQ_PHY_DPLL_CLK (1 << 0)
215 #define PHY_CLK_CTRL_STS 0xFF
216 #define PHY_DPLL_CLK (1 << 0)
218 /* In module TWL4030_MODULE_PM_MASTER */
219 #define PROTECT_KEY 0x0E
221 /* In module TWL4030_MODULE_PM_RECEIVER */
222 #define VUSB_DEDICATED1 0x7D
223 #define VUSB_DEDICATED2 0x7E
224 #define VUSB1V5_DEV_GRP 0x71
225 #define VUSB1V5_TYPE 0x72
226 #define VUSB1V5_REMAP 0x73
227 #define VUSB1V8_DEV_GRP 0x74
228 #define VUSB1V8_TYPE 0x75
229 #define VUSB1V8_REMAP 0x76
230 #define VUSB3V1_DEV_GRP 0x77
231 #define VUSB3V1_TYPE 0x78
232 #define VUSB3V1_REMAP 0x79
234 /* In module TWL4030_MODULE_INTBR */
236 #define GPIO_USB_4PIN_ULPI_2430C (3 << 0)
241 USB_LINK_UNKNOWN = 0,
248 struct otg_transceiver otg;
251 /* TWL4030 internal USB regulator supplies */
252 struct regulator *usb1v5;
253 struct regulator *usb1v8;
254 struct regulator *usb3v1;
256 /* for vbus reporting with irqs disabled */
259 /* pin configuration */
260 enum twl4030_usb_mode usb_mode;
268 /* internal define on top of container_of */
269 #define xceiv_to_twl(x) container_of((x), struct twl4030_usb, otg);
271 /*-------------------------------------------------------------------------*/
273 static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl,
274 u8 module, u8 data, u8 address)
278 if ((twl4030_i2c_write_u8(module, data, address) >= 0) &&
279 (twl4030_i2c_read_u8(module, &check, address) >= 0) &&
282 dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
283 1, module, address, check, data);
285 /* Failed once: Try again */
286 if ((twl4030_i2c_write_u8(module, data, address) >= 0) &&
287 (twl4030_i2c_read_u8(module, &check, address) >= 0) &&
290 dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
291 2, module, address, check, data);
293 /* Failed again: Return error */
297 #define twl4030_usb_write_verify(twl, address, data) \
298 twl4030_i2c_write_u8_verify(twl, TWL4030_MODULE_USB, (data), (address))
300 static inline int twl4030_usb_write(struct twl4030_usb *twl,
305 ret = twl4030_i2c_write_u8(TWL4030_MODULE_USB, data, address);
308 "TWL4030:USB:Write[0x%x] Error %d\n", address, ret);
312 static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address)
317 ret = twl4030_i2c_read_u8(module, &data, address);
322 "TWL4030:readb[0x%x,0x%x] Error %d\n",
323 module, address, ret);
328 static inline int twl4030_usb_read(struct twl4030_usb *twl, u8 address)
330 return twl4030_readb(twl, TWL4030_MODULE_USB, address);
333 /*-------------------------------------------------------------------------*/
336 twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
338 return twl4030_usb_write(twl, reg + 1, bits);
342 twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
344 return twl4030_usb_write(twl, reg + 2, bits);
347 /*-------------------------------------------------------------------------*/
349 static enum linkstat twl4030_usb_linkstat(struct twl4030_usb *twl)
352 int linkstat = USB_LINK_UNKNOWN;
354 /* STS_HW_CONDITIONS */
355 status = twl4030_readb(twl, TWL4030_MODULE_PM_MASTER, 0x0f);
357 dev_err(twl->dev, "USB link status err %d\n", status);
358 else if (status & BIT(7))
359 linkstat = USB_LINK_VBUS;
360 else if (status & BIT(2))
361 linkstat = USB_LINK_ID;
363 linkstat = USB_LINK_NONE;
365 dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
366 status, status, linkstat);
368 /* REVISIT this assumes host and peripheral controllers
369 * are registered, and that both are active...
372 spin_lock_irq(&twl->lock);
373 twl->linkstat = linkstat;
374 if (linkstat == USB_LINK_ID) {
375 twl->otg.default_a = true;
376 twl->otg.state = OTG_STATE_A_IDLE;
378 twl->otg.default_a = false;
379 twl->otg.state = OTG_STATE_B_IDLE;
381 spin_unlock_irq(&twl->lock);
386 static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode)
388 twl->usb_mode = mode;
391 case T2_USB_MODE_ULPI:
392 twl4030_usb_clear_bits(twl, IFC_CTRL, IFC_CTRL_CARKITMODE);
393 twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
394 twl4030_usb_clear_bits(twl, FUNC_CTRL,
395 FUNC_CTRL_XCVRSELECT_MASK |
396 FUNC_CTRL_OPMODE_MASK);
399 /* FIXME: power on defaults */
402 dev_err(twl->dev, "unsupported T2 transceiver mode %d\n",
408 static void twl4030_i2c_access(struct twl4030_usb *twl, int on)
410 unsigned long timeout;
411 int val = twl4030_usb_read(twl, PHY_CLK_CTRL);
415 /* enable DPLL to access PHY registers over I2C */
416 val |= REQ_PHY_DPLL_CLK;
417 WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
420 timeout = jiffies + HZ;
421 while (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
423 && time_before(jiffies, timeout))
425 if (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
427 dev_err(twl->dev, "Timeout setting T2 HSUSB "
430 /* let ULPI control the DPLL clock */
431 val &= ~REQ_PHY_DPLL_CLK;
432 WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
438 static void twl4030_phy_power(struct twl4030_usb *twl, int on)
442 pwr = twl4030_usb_read(twl, PHY_PWR_CTRL);
444 regulator_enable(twl->usb3v1);
445 regulator_enable(twl->usb1v8);
447 * Disabling usb3v1 regulator (= writing 0 to VUSB3V1_DEV_GRP
448 * in twl4030) resets the VUSB_DEDICATED2 register. This reset
449 * enables VUSB3V1_SLEEP bit that remaps usb3v1 ACTIVE state to
450 * SLEEP. We work around this by clearing the bit after usv3v1
451 * is re-activated. This ensures that VUSB3V1 is really active.
453 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0,
455 regulator_enable(twl->usb1v5);
456 pwr &= ~PHY_PWR_PHYPWD;
457 WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
458 twl4030_usb_write(twl, PHY_CLK_CTRL,
459 twl4030_usb_read(twl, PHY_CLK_CTRL) |
460 (PHY_CLK_CTRL_CLOCKGATING_EN |
461 PHY_CLK_CTRL_CLK32K_EN));
463 pwr |= PHY_PWR_PHYPWD;
464 WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
465 regulator_disable(twl->usb1v5);
466 regulator_disable(twl->usb1v8);
467 regulator_disable(twl->usb3v1);
471 static void twl4030_phy_suspend(struct twl4030_usb *twl, int controller_off)
476 twl4030_phy_power(twl, 0);
480 static void twl4030_phy_resume(struct twl4030_usb *twl)
485 twl4030_phy_power(twl, 1);
486 twl4030_i2c_access(twl, 1);
487 twl4030_usb_set_mode(twl, twl->usb_mode);
488 if (twl->usb_mode == T2_USB_MODE_ULPI)
489 twl4030_i2c_access(twl, 0);
493 static int twl4030_usb_ldo_init(struct twl4030_usb *twl)
495 /* Enable writing to power configuration registers */
496 twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0xC0, PROTECT_KEY);
497 twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0x0C, PROTECT_KEY);
499 /* put VUSB3V1 LDO in active state */
500 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);
502 /* input to VUSB3V1 LDO is from VBAT, not VBUS */
503 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1);
505 /* Initialize 3.1V regulator */
506 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP);
508 twl->usb3v1 = regulator_get(twl->dev, "usb3v1");
509 if (IS_ERR(twl->usb3v1))
512 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE);
514 /* Initialize 1.5V regulator */
515 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP);
517 twl->usb1v5 = regulator_get(twl->dev, "usb1v5");
518 if (IS_ERR(twl->usb1v5))
521 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE);
523 /* Initialize 1.8V regulator */
524 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP);
526 twl->usb1v8 = regulator_get(twl->dev, "usb1v8");
527 if (IS_ERR(twl->usb1v8))
530 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE);
532 /* disable access to power configuration registers */
533 twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, PROTECT_KEY);
538 regulator_put(twl->usb1v5);
541 regulator_put(twl->usb3v1);
546 static ssize_t twl4030_usb_vbus_show(struct device *dev,
547 struct device_attribute *attr, char *buf)
549 struct twl4030_usb *twl = dev_get_drvdata(dev);
553 spin_lock_irqsave(&twl->lock, flags);
554 ret = sprintf(buf, "%s\n",
555 (twl->linkstat == USB_LINK_VBUS) ? "on" : "off");
556 spin_unlock_irqrestore(&twl->lock, flags);
560 static DEVICE_ATTR(vbus, 0444, twl4030_usb_vbus_show, NULL);
562 static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
564 struct twl4030_usb *twl = _twl;
567 #ifdef CONFIG_LOCKDEP
568 /* WORKAROUND for lockdep forcing IRQF_DISABLED on us, which
569 * we don't want and can't tolerate. Although it might be
570 * friendlier not to borrow this thread context...
575 status = twl4030_usb_linkstat(twl);
576 if (status != USB_LINK_UNKNOWN) {
578 /* FIXME add a set_power() method so that B-devices can
579 * configure the charger appropriately. It's not always
580 * correct to consume VBUS power, and how much current to
581 * consume is a function of the USB configuration chosen
584 * REVISIT usb_gadget_vbus_connect(...) as needed, ditto
585 * its disconnect() sibling, when changing to/from the
586 * USB_LINK_VBUS state. musb_hdrc won't care until it
587 * starts to handle softconnect right.
589 twl4030charger_usb_en(status == USB_LINK_VBUS);
591 if (status == USB_LINK_NONE)
592 twl4030_phy_suspend(twl, 0);
594 twl4030_phy_resume(twl);
596 sysfs_notify(&twl->dev->kobj, NULL, "vbus");
601 static int twl4030_set_suspend(struct otg_transceiver *x, int suspend)
603 struct twl4030_usb *twl = xceiv_to_twl(x);
606 twl4030_phy_suspend(twl, 1);
608 twl4030_phy_resume(twl);
613 static int twl4030_set_peripheral(struct otg_transceiver *x,
614 struct usb_gadget *gadget)
616 struct twl4030_usb *twl;
621 twl = xceiv_to_twl(x);
622 twl->otg.gadget = gadget;
624 twl->otg.state = OTG_STATE_UNDEFINED;
629 static int twl4030_set_host(struct otg_transceiver *x, struct usb_bus *host)
631 struct twl4030_usb *twl;
636 twl = xceiv_to_twl(x);
637 twl->otg.host = host;
639 twl->otg.state = OTG_STATE_UNDEFINED;
644 static int __init twl4030_usb_probe(struct platform_device *pdev)
646 struct twl4030_usb_data *pdata = pdev->dev.platform_data;
647 struct twl4030_usb *twl;
651 dev_dbg(&pdev->dev, "platform_data not available\n");
655 twl = kzalloc(sizeof *twl, GFP_KERNEL);
659 twl->dev = &pdev->dev;
660 twl->irq = platform_get_irq(pdev, 0);
661 twl->otg.dev = twl->dev;
662 twl->otg.label = "twl4030";
663 twl->otg.set_host = twl4030_set_host;
664 twl->otg.set_peripheral = twl4030_set_peripheral;
665 twl->otg.set_suspend = twl4030_set_suspend;
666 twl->usb_mode = pdata->usb_mode;
669 /* init spinlock for workqueue */
670 spin_lock_init(&twl->lock);
672 err = twl4030_usb_ldo_init(twl);
674 dev_err(&pdev->dev, "ldo init failed\n");
678 otg_set_transceiver(&twl->otg);
680 platform_set_drvdata(pdev, twl);
681 if (device_create_file(&pdev->dev, &dev_attr_vbus))
682 dev_warn(&pdev->dev, "could not create sysfs file\n");
684 /* Our job is to use irqs and status from the power module
685 * to keep the transceiver disabled when nothing's connected.
687 * FIXME we actually shouldn't start enabling it until the
688 * USB controller drivers have said they're ready, by calling
689 * set_host() and/or set_peripheral() ... OTG_capable boards
690 * need both handles, otherwise just one suffices.
692 twl->irq_enabled = true;
693 status = request_irq(twl->irq, twl4030_usb_irq,
694 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
697 dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n",
703 /* The IRQ handler just handles changes from the previous states
704 * of the ID and VBUS pins ... in probe() we must initialize that
705 * previous state. The easy way: fake an IRQ.
707 * REVISIT: a real IRQ might have happened already, if PREEMPT is
708 * enabled. Else the IRQ may not yet be configured or enabled,
709 * because of scheduling delays.
711 twl4030_usb_irq(twl->irq, twl);
713 dev_info(&pdev->dev, "Initialized TWL4030 USB module\n");
717 static int __exit twl4030_usb_remove(struct platform_device *pdev)
719 struct twl4030_usb *twl = platform_get_drvdata(pdev);
722 free_irq(twl->irq, twl);
723 device_remove_file(twl->dev, &dev_attr_vbus);
725 /* set transceiver mode to power on defaults */
726 twl4030_usb_set_mode(twl, -1);
728 /* autogate 60MHz ULPI clock,
729 * clear dpll clock request for i2c access,
732 val = twl4030_usb_read(twl, PHY_CLK_CTRL);
734 val |= PHY_CLK_CTRL_CLOCKGATING_EN;
735 val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK);
736 twl4030_usb_write(twl, PHY_CLK_CTRL, (u8)val);
739 /* disable complete OTG block */
740 twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
742 twl4030_phy_power(twl, 0);
743 regulator_put(twl->usb1v5);
744 regulator_put(twl->usb1v8);
745 regulator_put(twl->usb3v1);
752 static struct platform_driver twl4030_usb_driver = {
753 .probe = twl4030_usb_probe,
754 .remove = __exit_p(twl4030_usb_remove),
756 .name = "twl4030_usb",
757 .owner = THIS_MODULE,
761 static int __init twl4030_usb_init(void)
763 return platform_driver_register(&twl4030_usb_driver);
765 subsys_initcall(twl4030_usb_init);
767 static void __exit twl4030_usb_exit(void)
769 platform_driver_unregister(&twl4030_usb_driver);
771 module_exit(twl4030_usb_exit);
773 MODULE_ALIAS("platform:twl4030_usb");
774 MODULE_AUTHOR("Texas Instruments, Inc, Nokia Corporation");
775 MODULE_DESCRIPTION("TWL4030 USB transceiver driver");
776 MODULE_LICENSE("GPL");