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>
39 /* Register defines */
41 #define VENDOR_ID_LO 0x00
42 #define VENDOR_ID_HI 0x01
43 #define PRODUCT_ID_LO 0x02
44 #define PRODUCT_ID_HI 0x03
46 #define FUNC_CTRL 0x04
47 #define FUNC_CTRL_SET 0x05
48 #define FUNC_CTRL_CLR 0x06
49 #define FUNC_CTRL_SUSPENDM (1 << 6)
50 #define FUNC_CTRL_RESET (1 << 5)
51 #define FUNC_CTRL_OPMODE_MASK (3 << 3) /* bits 3 and 4 */
52 #define FUNC_CTRL_OPMODE_NORMAL (0 << 3)
53 #define FUNC_CTRL_OPMODE_NONDRIVING (1 << 3)
54 #define FUNC_CTRL_OPMODE_DISABLE_BIT_NRZI (2 << 3)
55 #define FUNC_CTRL_TERMSELECT (1 << 2)
56 #define FUNC_CTRL_XCVRSELECT_MASK (3 << 0) /* bits 0 and 1 */
57 #define FUNC_CTRL_XCVRSELECT_HS (0 << 0)
58 #define FUNC_CTRL_XCVRSELECT_FS (1 << 0)
59 #define FUNC_CTRL_XCVRSELECT_LS (2 << 0)
60 #define FUNC_CTRL_XCVRSELECT_FS4LS (3 << 0)
63 #define IFC_CTRL_SET 0x08
64 #define IFC_CTRL_CLR 0x09
65 #define IFC_CTRL_INTERFACE_PROTECT_DISABLE (1 << 7)
66 #define IFC_CTRL_AUTORESUME (1 << 4)
67 #define IFC_CTRL_CLOCKSUSPENDM (1 << 3)
68 #define IFC_CTRL_CARKITMODE (1 << 2)
69 #define IFC_CTRL_FSLSSERIALMODE_3PIN (1 << 1)
71 #define TWL4030_OTG_CTRL 0x0A
72 #define TWL4030_OTG_CTRL_SET 0x0B
73 #define TWL4030_OTG_CTRL_CLR 0x0C
74 #define TWL4030_OTG_CTRL_DRVVBUS (1 << 5)
75 #define TWL4030_OTG_CTRL_CHRGVBUS (1 << 4)
76 #define TWL4030_OTG_CTRL_DISCHRGVBUS (1 << 3)
77 #define TWL4030_OTG_CTRL_DMPULLDOWN (1 << 2)
78 #define TWL4030_OTG_CTRL_DPPULLDOWN (1 << 1)
79 #define TWL4030_OTG_CTRL_IDPULLUP (1 << 0)
81 #define USB_INT_EN_RISE 0x0D
82 #define USB_INT_EN_RISE_SET 0x0E
83 #define USB_INT_EN_RISE_CLR 0x0F
84 #define USB_INT_EN_FALL 0x10
85 #define USB_INT_EN_FALL_SET 0x11
86 #define USB_INT_EN_FALL_CLR 0x12
87 #define USB_INT_STS 0x13
88 #define USB_INT_LATCH 0x14
89 #define USB_INT_IDGND (1 << 4)
90 #define USB_INT_SESSEND (1 << 3)
91 #define USB_INT_SESSVALID (1 << 2)
92 #define USB_INT_VBUSVALID (1 << 1)
93 #define USB_INT_HOSTDISCONNECT (1 << 0)
95 #define CARKIT_CTRL 0x19
96 #define CARKIT_CTRL_SET 0x1A
97 #define CARKIT_CTRL_CLR 0x1B
98 #define CARKIT_CTRL_MICEN (1 << 6)
99 #define CARKIT_CTRL_SPKRIGHTEN (1 << 5)
100 #define CARKIT_CTRL_SPKLEFTEN (1 << 4)
101 #define CARKIT_CTRL_RXDEN (1 << 3)
102 #define CARKIT_CTRL_TXDEN (1 << 2)
103 #define CARKIT_CTRL_IDGNDDRV (1 << 1)
104 #define CARKIT_CTRL_CARKITPWR (1 << 0)
105 #define CARKIT_PLS_CTRL 0x22
106 #define CARKIT_PLS_CTRL_SET 0x23
107 #define CARKIT_PLS_CTRL_CLR 0x24
108 #define CARKIT_PLS_CTRL_SPKRRIGHT_BIASEN (1 << 3)
109 #define CARKIT_PLS_CTRL_SPKRLEFT_BIASEN (1 << 2)
110 #define CARKIT_PLS_CTRL_RXPLSEN (1 << 1)
111 #define CARKIT_PLS_CTRL_TXPLSEN (1 << 0)
113 #define MCPC_CTRL 0x30
114 #define MCPC_CTRL_SET 0x31
115 #define MCPC_CTRL_CLR 0x32
116 #define MCPC_CTRL_RTSOL (1 << 7)
117 #define MCPC_CTRL_EXTSWR (1 << 6)
118 #define MCPC_CTRL_EXTSWC (1 << 5)
119 #define MCPC_CTRL_VOICESW (1 << 4)
120 #define MCPC_CTRL_OUT64K (1 << 3)
121 #define MCPC_CTRL_RTSCTSSW (1 << 2)
122 #define MCPC_CTRL_HS_UART (1 << 0)
124 #define MCPC_IO_CTRL 0x33
125 #define MCPC_IO_CTRL_SET 0x34
126 #define MCPC_IO_CTRL_CLR 0x35
127 #define MCPC_IO_CTRL_MICBIASEN (1 << 5)
128 #define MCPC_IO_CTRL_CTS_NPU (1 << 4)
129 #define MCPC_IO_CTRL_RXD_PU (1 << 3)
130 #define MCPC_IO_CTRL_TXDTYP (1 << 2)
131 #define MCPC_IO_CTRL_CTSTYP (1 << 1)
132 #define MCPC_IO_CTRL_RTSTYP (1 << 0)
134 #define MCPC_CTRL2 0x36
135 #define MCPC_CTRL2_SET 0x37
136 #define MCPC_CTRL2_CLR 0x38
137 #define MCPC_CTRL2_MCPC_CK_EN (1 << 0)
139 #define OTHER_FUNC_CTRL 0x80
140 #define OTHER_FUNC_CTRL_SET 0x81
141 #define OTHER_FUNC_CTRL_CLR 0x82
142 #define OTHER_FUNC_CTRL_BDIS_ACON_EN (1 << 4)
143 #define OTHER_FUNC_CTRL_FIVEWIRE_MODE (1 << 2)
145 #define OTHER_IFC_CTRL 0x83
146 #define OTHER_IFC_CTRL_SET 0x84
147 #define OTHER_IFC_CTRL_CLR 0x85
148 #define OTHER_IFC_CTRL_OE_INT_EN (1 << 6)
149 #define OTHER_IFC_CTRL_CEA2011_MODE (1 << 5)
150 #define OTHER_IFC_CTRL_FSLSSERIALMODE_4PIN (1 << 4)
151 #define OTHER_IFC_CTRL_HIZ_ULPI_60MHZ_OUT (1 << 3)
152 #define OTHER_IFC_CTRL_HIZ_ULPI (1 << 2)
153 #define OTHER_IFC_CTRL_ALT_INT_REROUTE (1 << 0)
155 #define OTHER_INT_EN_RISE 0x86
156 #define OTHER_INT_EN_RISE_SET 0x87
157 #define OTHER_INT_EN_RISE_CLR 0x88
158 #define OTHER_INT_EN_FALL 0x89
159 #define OTHER_INT_EN_FALL_SET 0x8A
160 #define OTHER_INT_EN_FALL_CLR 0x8B
161 #define OTHER_INT_STS 0x8C
162 #define OTHER_INT_LATCH 0x8D
163 #define OTHER_INT_VB_SESS_VLD (1 << 7)
164 #define OTHER_INT_DM_HI (1 << 6) /* not valid for "latch" reg */
165 #define OTHER_INT_DP_HI (1 << 5) /* not valid for "latch" reg */
166 #define OTHER_INT_BDIS_ACON (1 << 3) /* not valid for "fall" regs */
167 #define OTHER_INT_MANU (1 << 1)
168 #define OTHER_INT_ABNORMAL_STRESS (1 << 0)
170 #define ID_STATUS 0x96
171 #define ID_RES_FLOAT (1 << 4)
172 #define ID_RES_440K (1 << 3)
173 #define ID_RES_200K (1 << 2)
174 #define ID_RES_102K (1 << 1)
175 #define ID_RES_GND (1 << 0)
177 #define POWER_CTRL 0xAC
178 #define POWER_CTRL_SET 0xAD
179 #define POWER_CTRL_CLR 0xAE
180 #define POWER_CTRL_OTG_ENAB (1 << 5)
182 #define OTHER_IFC_CTRL2 0xAF
183 #define OTHER_IFC_CTRL2_SET 0xB0
184 #define OTHER_IFC_CTRL2_CLR 0xB1
185 #define OTHER_IFC_CTRL2_ULPI_STP_LOW (1 << 4)
186 #define OTHER_IFC_CTRL2_ULPI_TXEN_POL (1 << 3)
187 #define OTHER_IFC_CTRL2_ULPI_4PIN_2430 (1 << 2)
188 #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_MASK (3 << 0) /* bits 0 and 1 */
189 #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT1N (0 << 0)
190 #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT2N (1 << 0)
192 #define REG_CTRL_EN 0xB2
193 #define REG_CTRL_EN_SET 0xB3
194 #define REG_CTRL_EN_CLR 0xB4
195 #define REG_CTRL_ERROR 0xB5
196 #define ULPI_I2C_CONFLICT_INTEN (1 << 0)
198 #define OTHER_FUNC_CTRL2 0xB8
199 #define OTHER_FUNC_CTRL2_SET 0xB9
200 #define OTHER_FUNC_CTRL2_CLR 0xBA
201 #define OTHER_FUNC_CTRL2_VBAT_TIMER_EN (1 << 0)
203 /* following registers do not have separate _clr and _set registers */
204 #define VBUS_DEBOUNCE 0xC0
205 #define ID_DEBOUNCE 0xC1
206 #define VBAT_TIMER 0xD3
207 #define PHY_PWR_CTRL 0xFD
208 #define PHY_PWR_PHYPWD (1 << 0)
209 #define PHY_CLK_CTRL 0xFE
210 #define PHY_CLK_CTRL_CLOCKGATING_EN (1 << 2)
211 #define PHY_CLK_CTRL_CLK32K_EN (1 << 1)
212 #define REQ_PHY_DPLL_CLK (1 << 0)
213 #define PHY_CLK_CTRL_STS 0xFF
214 #define PHY_DPLL_CLK (1 << 0)
216 /* In module TWL4030_MODULE_PM_MASTER */
217 #define PROTECT_KEY 0x0E
219 /* In module TWL4030_MODULE_PM_RECEIVER */
220 #define VUSB_DEDICATED1 0x7D
221 #define VUSB_DEDICATED2 0x7E
222 #define VUSB1V5_DEV_GRP 0x71
223 #define VUSB1V5_TYPE 0x72
224 #define VUSB1V5_REMAP 0x73
225 #define VUSB1V8_DEV_GRP 0x74
226 #define VUSB1V8_TYPE 0x75
227 #define VUSB1V8_REMAP 0x76
228 #define VUSB3V1_DEV_GRP 0x77
229 #define VUSB3V1_TYPE 0x78
230 #define VUSB3V1_REMAP 0x79
232 /* In module TWL4030_MODULE_INTBR */
234 #define GPIO_USB_4PIN_ULPI_2430C (3 << 0)
239 USB_LINK_UNKNOWN = 0,
246 struct otg_transceiver otg;
249 /* for vbus reporting with irqs disabled */
252 /* pin configuration */
253 enum twl4030_usb_mode usb_mode;
261 /* internal define on top of container_of */
262 #define xceiv_to_twl(x) container_of((x), struct twl4030_usb, otg);
264 /*-------------------------------------------------------------------------*/
266 static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl,
267 u8 module, u8 data, u8 address)
271 if ((twl4030_i2c_write_u8(module, data, address) >= 0) &&
272 (twl4030_i2c_read_u8(module, &check, address) >= 0) &&
275 dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
276 1, module, address, check, data);
278 /* Failed once: Try again */
279 if ((twl4030_i2c_write_u8(module, data, address) >= 0) &&
280 (twl4030_i2c_read_u8(module, &check, address) >= 0) &&
283 dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n",
284 2, module, address, check, data);
286 /* Failed again: Return error */
290 #define twl4030_usb_write_verify(twl, address, data) \
291 twl4030_i2c_write_u8_verify(twl, TWL4030_MODULE_USB, (data), (address))
293 static inline int twl4030_usb_write(struct twl4030_usb *twl,
298 ret = twl4030_i2c_write_u8(TWL4030_MODULE_USB, data, address);
301 "TWL4030:USB:Write[0x%x] Error %d\n", address, ret);
305 static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address)
310 ret = twl4030_i2c_read_u8(module, &data, address);
315 "TWL4030:readb[0x%x,0x%x] Error %d\n",
316 module, address, ret);
321 static inline int twl4030_usb_read(struct twl4030_usb *twl, u8 address)
323 return twl4030_readb(twl, TWL4030_MODULE_USB, address);
326 /*-------------------------------------------------------------------------*/
329 twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
331 return twl4030_usb_write(twl, reg + 1, bits);
335 twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits)
337 return twl4030_usb_write(twl, reg + 2, bits);
340 /*-------------------------------------------------------------------------*/
342 static enum linkstat twl4030_usb_linkstat(struct twl4030_usb *twl)
345 int linkstat = USB_LINK_UNKNOWN;
347 /* STS_HW_CONDITIONS */
348 status = twl4030_readb(twl, TWL4030_MODULE_PM_MASTER, 0x0f);
350 dev_err(twl->dev, "USB link status err %d\n", status);
351 else if (status & BIT(7))
352 linkstat = USB_LINK_VBUS;
353 else if (status & BIT(2))
354 linkstat = USB_LINK_ID;
356 linkstat = USB_LINK_NONE;
358 dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
359 status, status, linkstat);
361 /* REVISIT this assumes host and peripheral controllers
362 * are registered, and that both are active...
365 spin_lock_irq(&twl->lock);
366 twl->linkstat = linkstat;
367 if (linkstat == USB_LINK_ID) {
368 twl->otg.default_a = true;
369 twl->otg.state = OTG_STATE_A_IDLE;
371 twl->otg.default_a = false;
372 twl->otg.state = OTG_STATE_B_IDLE;
374 spin_unlock_irq(&twl->lock);
379 static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode)
381 twl->usb_mode = mode;
384 case T2_USB_MODE_ULPI:
385 twl4030_usb_clear_bits(twl, IFC_CTRL, IFC_CTRL_CARKITMODE);
386 twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
387 twl4030_usb_clear_bits(twl, FUNC_CTRL,
388 FUNC_CTRL_XCVRSELECT_MASK |
389 FUNC_CTRL_OPMODE_MASK);
392 /* FIXME: power on defaults */
395 dev_err(twl->dev, "unsupported T2 transceiver mode %d\n",
401 static void twl4030_i2c_access(struct twl4030_usb *twl, int on)
403 unsigned long timeout;
404 int val = twl4030_usb_read(twl, PHY_CLK_CTRL);
408 /* enable DPLL to access PHY registers over I2C */
409 val |= REQ_PHY_DPLL_CLK;
410 WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
413 timeout = jiffies + HZ;
414 while (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
416 && time_before(jiffies, timeout))
418 if (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) &
420 dev_err(twl->dev, "Timeout setting T2 HSUSB "
423 /* let ULPI control the DPLL clock */
424 val &= ~REQ_PHY_DPLL_CLK;
425 WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL,
431 static void twl4030_phy_power(struct twl4030_usb *twl, int on)
435 pwr = twl4030_usb_read(twl, PHY_PWR_CTRL);
437 pwr &= ~PHY_PWR_PHYPWD;
438 WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
439 twl4030_usb_write(twl, PHY_CLK_CTRL,
440 twl4030_usb_read(twl, PHY_CLK_CTRL) |
441 (PHY_CLK_CTRL_CLOCKGATING_EN |
442 PHY_CLK_CTRL_CLK32K_EN));
444 pwr |= PHY_PWR_PHYPWD;
445 WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
449 static void twl4030_phy_suspend(struct twl4030_usb *twl, int controller_off)
454 twl4030_phy_power(twl, 0);
458 static void twl4030_phy_resume(struct twl4030_usb *twl)
463 twl4030_phy_power(twl, 1);
464 twl4030_i2c_access(twl, 1);
465 twl4030_usb_set_mode(twl, twl->usb_mode);
466 if (twl->usb_mode == T2_USB_MODE_ULPI)
467 twl4030_i2c_access(twl, 0);
471 static void twl4030_usb_ldo_init(struct twl4030_usb *twl)
473 /* Enable writing to power configuration registers */
474 twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0xC0, PROTECT_KEY);
475 twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0x0C, PROTECT_KEY);
477 /* put VUSB3V1 LDO in active state */
478 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);
480 /* input to VUSB3V1 LDO is from VBAT, not VBUS */
481 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1);
483 /* turn on 3.1V regulator */
484 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB3V1_DEV_GRP);
485 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE);
487 /* turn on 1.5V regulator */
488 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB1V5_DEV_GRP);
489 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE);
491 /* turn on 1.8V regulator */
492 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB1V8_DEV_GRP);
493 twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE);
495 /* disable access to power configuration registers */
496 twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, PROTECT_KEY);
499 static ssize_t twl4030_usb_vbus_show(struct device *dev,
500 struct device_attribute *attr, char *buf)
502 struct twl4030_usb *twl = dev_get_drvdata(dev);
506 spin_lock_irqsave(&twl->lock, flags);
507 ret = sprintf(buf, "%s\n",
508 (twl->linkstat == USB_LINK_VBUS) ? "on" : "off");
509 spin_unlock_irqrestore(&twl->lock, flags);
513 static DEVICE_ATTR(vbus, 0444, twl4030_usb_vbus_show, NULL);
515 static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
517 struct twl4030_usb *twl = _twl;
520 #ifdef CONFIG_LOCKDEP
521 /* WORKAROUND for lockdep forcing IRQF_DISABLED on us, which
522 * we don't want and can't tolerate. Although it might be
523 * friendlier not to borrow this thread context...
528 status = twl4030_usb_linkstat(twl);
529 if (status != USB_LINK_UNKNOWN) {
531 /* FIXME add a set_power() method so that B-devices can
532 * configure the charger appropriately. It's not always
533 * correct to consume VBUS power, and how much current to
534 * consume is a function of the USB configuration chosen
537 * REVISIT usb_gadget_vbus_connect(...) as needed, ditto
538 * its disconnect() sibling, when changing to/from the
539 * USB_LINK_VBUS state. musb_hdrc won't care until it
540 * starts to handle softconnect right.
542 twl4030charger_usb_en(status == USB_LINK_VBUS);
544 if (status == USB_LINK_NONE)
545 twl4030_phy_suspend(twl, 0);
547 twl4030_phy_resume(twl);
549 sysfs_notify(&twl->dev->kobj, NULL, "vbus");
554 static int twl4030_set_suspend(struct otg_transceiver *x, int suspend)
556 struct twl4030_usb *twl = xceiv_to_twl(x);
559 twl4030_phy_suspend(twl, 1);
561 twl4030_phy_resume(twl);
566 static int twl4030_set_peripheral(struct otg_transceiver *x,
567 struct usb_gadget *gadget)
569 struct twl4030_usb *twl;
574 twl = xceiv_to_twl(x);
575 twl->otg.gadget = gadget;
577 twl->otg.state = OTG_STATE_UNDEFINED;
582 static int twl4030_set_host(struct otg_transceiver *x, struct usb_bus *host)
584 struct twl4030_usb *twl;
589 twl = xceiv_to_twl(x);
590 twl->otg.host = host;
592 twl->otg.state = OTG_STATE_UNDEFINED;
597 static int __init twl4030_usb_probe(struct platform_device *pdev)
599 struct twl4030_usb_data *pdata = pdev->dev.platform_data;
600 struct twl4030_usb *twl;
604 dev_dbg(&pdev->dev, "platform_data not available\n");
608 twl = kzalloc(sizeof *twl, GFP_KERNEL);
612 twl->dev = &pdev->dev;
613 twl->irq = platform_get_irq(pdev, 0);
614 twl->otg.dev = twl->dev;
615 twl->otg.label = "twl4030";
616 twl->otg.set_host = twl4030_set_host;
617 twl->otg.set_peripheral = twl4030_set_peripheral;
618 twl->otg.set_suspend = twl4030_set_suspend;
619 twl->usb_mode = pdata->usb_mode;
622 /* init spinlock for workqueue */
623 spin_lock_init(&twl->lock);
625 twl4030_usb_ldo_init(twl);
626 otg_set_transceiver(&twl->otg);
628 platform_set_drvdata(pdev, twl);
629 if (device_create_file(&pdev->dev, &dev_attr_vbus))
630 dev_warn(&pdev->dev, "could not create sysfs file\n");
632 /* Our job is to use irqs and status from the power module
633 * to keep the transceiver disabled when nothing's connected.
635 * FIXME we actually shouldn't start enabling it until the
636 * USB controller drivers have said they're ready, by calling
637 * set_host() and/or set_peripheral() ... OTG_capable boards
638 * need both handles, otherwise just one suffices.
640 twl->irq_enabled = true;
641 status = request_irq(twl->irq, twl4030_usb_irq,
642 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
645 dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n",
651 /* The IRQ handler just handles changes from the previous states
652 * of the ID and VBUS pins ... in probe() we must initialize that
653 * previous state. The easy way: fake an IRQ.
655 * REVISIT: a real IRQ might have happened already, if PREEMPT is
656 * enabled. Else the IRQ may not yet be configured or enabled,
657 * because of scheduling delays.
659 twl4030_usb_irq(twl->irq, twl);
661 dev_info(&pdev->dev, "Initialized TWL4030 USB module\n");
665 static int __exit twl4030_usb_remove(struct platform_device *pdev)
667 struct twl4030_usb *twl = platform_get_drvdata(pdev);
670 free_irq(twl->irq, twl);
671 device_remove_file(twl->dev, &dev_attr_vbus);
673 /* set transceiver mode to power on defaults */
674 twl4030_usb_set_mode(twl, -1);
676 /* autogate 60MHz ULPI clock,
677 * clear dpll clock request for i2c access,
680 val = twl4030_usb_read(twl, PHY_CLK_CTRL);
682 val |= PHY_CLK_CTRL_CLOCKGATING_EN;
683 val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK);
684 twl4030_usb_write(twl, PHY_CLK_CTRL, (u8)val);
687 /* disable complete OTG block */
688 twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
690 twl4030_phy_power(twl, 0);
697 static struct platform_driver twl4030_usb_driver = {
698 .probe = twl4030_usb_probe,
699 .remove = __exit_p(twl4030_remove),
701 .name = "twl4030_usb",
702 .owner = THIS_MODULE,
706 static int __init twl4030_usb_init(void)
708 return platform_driver_register(&twl4030_usb_driver);
710 subsys_initcall(twl4030_usb_init);
712 static void __exit twl4030_usb_exit(void)
714 platform_driver_unregister(&twl4030_usb_driver);
716 module_exit(twl4030_usb_exit);
718 MODULE_ALIAS("platform:twl4030_usb");
719 MODULE_AUTHOR("Texas Instruments, Inc, Nokia Corporation");
720 MODULE_DESCRIPTION("TWL4030 USB transceiver driver");
721 MODULE_LICENSE("GPL");