/* * twl4030_usb - TWL4030 USB transceiver, talking to OMAP OTG controller * * Copyright (C) 2004-2007 Texas Instruments * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Current status: * - HS USB ULPI mode works. * - 3-pin mode support may be added in future. */ #include #include #include #include #include #include /* Register defines */ #define VENDOR_ID_LO 0x00 #define VENDOR_ID_HI 0x01 #define PRODUCT_ID_LO 0x02 #define PRODUCT_ID_HI 0x03 #define FUNC_CTRL 0x04 #define FUNC_CTRL_SET 0x05 #define FUNC_CTRL_CLR 0x06 #define FUNC_CTRL_SUSPENDM (1 << 6) #define FUNC_CTRL_RESET (1 << 5) #define FUNC_CTRL_OPMODE_MASK (3 << 3) /* bits 3 and 4 */ #define FUNC_CTRL_OPMODE_NORMAL (0 << 3) #define FUNC_CTRL_OPMODE_NONDRIVING (1 << 3) #define FUNC_CTRL_OPMODE_DISABLE_BIT_NRZI (2 << 3) #define FUNC_CTRL_TERMSELECT (1 << 2) #define FUNC_CTRL_XCVRSELECT_MASK (3 << 0) /* bits 0 and 1 */ #define FUNC_CTRL_XCVRSELECT_HS (0 << 0) #define FUNC_CTRL_XCVRSELECT_FS (1 << 0) #define FUNC_CTRL_XCVRSELECT_LS (2 << 0) #define FUNC_CTRL_XCVRSELECT_FS4LS (3 << 0) #define IFC_CTRL 0x07 #define IFC_CTRL_SET 0x08 #define IFC_CTRL_CLR 0x09 #define IFC_CTRL_INTERFACE_PROTECT_DISABLE (1 << 7) #define IFC_CTRL_AUTORESUME (1 << 4) #define IFC_CTRL_CLOCKSUSPENDM (1 << 3) #define IFC_CTRL_CARKITMODE (1 << 2) #define IFC_CTRL_FSLSSERIALMODE_3PIN (1 << 1) #define OTG_CTRL 0x0A #define OTG_CTRL_SET 0x0B #define OTG_CTRL_CLR 0x0C #define OTG_CTRL_DRVVBUS (1 << 5) #define OTG_CTRL_CHRGVBUS (1 << 4) #define OTG_CTRL_DISCHRGVBUS (1 << 3) #define OTG_CTRL_DMPULLDOWN (1 << 2) #define OTG_CTRL_DPPULLDOWN (1 << 1) #define OTG_CTRL_IDPULLUP (1 << 0) #define USB_INT_EN_RISE 0x0D #define USB_INT_EN_RISE_SET 0x0E #define USB_INT_EN_RISE_CLR 0x0F #define USB_INT_EN_FALL 0x10 #define USB_INT_EN_FALL_SET 0x11 #define USB_INT_EN_FALL_CLR 0x12 #define USB_INT_STS 0x13 #define USB_INT_LATCH 0x14 #define USB_INT_IDGND (1 << 4) #define USB_INT_SESSEND (1 << 3) #define USB_INT_SESSVALID (1 << 2) #define USB_INT_VBUSVALID (1 << 1) #define USB_INT_HOSTDISCONNECT (1 << 0) #define CARKIT_CTRL 0x19 #define CARKIT_CTRL_SET 0x1A #define CARKIT_CTRL_CLR 0x1B #define CARKIT_CTRL_MICEN (1 << 6) #define CARKIT_CTRL_SPKRIGHTEN (1 << 5) #define CARKIT_CTRL_SPKLEFTEN (1 << 4) #define CARKIT_CTRL_RXDEN (1 << 3) #define CARKIT_CTRL_TXDEN (1 << 2) #define CARKIT_CTRL_IDGNDDRV (1 << 1) #define CARKIT_CTRL_CARKITPWR (1 << 0) #define CARKIT_PLS_CTRL 0x22 #define CARKIT_PLS_CTRL_SET 0x23 #define CARKIT_PLS_CTRL_CLR 0x24 #define CARKIT_PLS_CTRL_SPKRRIGHT_BIASEN (1 << 3) #define CARKIT_PLS_CTRL_SPKRLEFT_BIASEN (1 << 2) #define CARKIT_PLS_CTRL_RXPLSEN (1 << 1) #define CARKIT_PLS_CTRL_TXPLSEN (1 << 0) #define MCPC_CTRL 0x30 #define MCPC_CTRL_SET 0x31 #define MCPC_CTRL_CLR 0x32 #define MCPC_CTRL_RTSOL (1 << 7) #define MCPC_CTRL_EXTSWR (1 << 6) #define MCPC_CTRL_EXTSWC (1 << 5) #define MCPC_CTRL_VOICESW (1 << 4) #define MCPC_CTRL_OUT64K (1 << 3) #define MCPC_CTRL_RTSCTSSW (1 << 2) #define MCPC_CTRL_HS_UART (1 << 0) #define MCPC_IO_CTRL 0x33 #define MCPC_IO_CTRL_SET 0x34 #define MCPC_IO_CTRL_CLR 0x35 #define MCPC_IO_CTRL_MICBIASEN (1 << 5) #define MCPC_IO_CTRL_CTS_NPU (1 << 4) #define MCPC_IO_CTRL_RXD_PU (1 << 3) #define MCPC_IO_CTRL_TXDTYP (1 << 2) #define MCPC_IO_CTRL_CTSTYP (1 << 1) #define MCPC_IO_CTRL_RTSTYP (1 << 0) #define MCPC_CTRL2 0x36 #define MCPC_CTRL2_SET 0x37 #define MCPC_CTRL2_CLR 0x38 #define MCPC_CTRL2_MCPC_CK_EN (1 << 0) #define OTHER_FUNC_CTRL 0x80 #define OTHER_FUNC_CTRL_SET 0x81 #define OTHER_FUNC_CTRL_CLR 0x82 #define OTHER_FUNC_CTRL_BDIS_ACON_EN (1 << 4) #define OTHER_FUNC_CTRL_FIVEWIRE_MODE (1 << 2) #define OTHER_IFC_CTRL 0x83 #define OTHER_IFC_CTRL_SET 0x84 #define OTHER_IFC_CTRL_CLR 0x85 #define OTHER_IFC_CTRL_OE_INT_EN (1 << 6) #define OTHER_IFC_CTRL_CEA2011_MODE (1 << 5) #define OTHER_IFC_CTRL_FSLSSERIALMODE_4PIN (1 << 4) #define OTHER_IFC_CTRL_HIZ_ULPI_60MHZ_OUT (1 << 3) #define OTHER_IFC_CTRL_HIZ_ULPI (1 << 2) #define OTHER_IFC_CTRL_ALT_INT_REROUTE (1 << 0) #define OTHER_INT_EN_RISE 0x86 #define OTHER_INT_EN_RISE_SET 0x87 #define OTHER_INT_EN_RISE_CLR 0x88 #define OTHER_INT_EN_FALL 0x89 #define OTHER_INT_EN_FALL_SET 0x8A #define OTHER_INT_EN_FALL_CLR 0x8B #define OTHER_INT_STS 0x8C #define OTHER_INT_LATCH 0x8D #define OTHER_INT_VB_SESS_VLD (1 << 7) #define OTHER_INT_DM_HI (1 << 6) /* not valid for "latch" reg */ #define OTHER_INT_DP_HI (1 << 5) /* not valid for "latch" reg */ #define OTHER_INT_BDIS_ACON (1 << 3) /* not valid for "fall" regs */ #define OTHER_INT_MANU (1 << 1) #define OTHER_INT_ABNORMAL_STRESS (1 << 0) #define ID_STATUS 0x96 #define ID_RES_FLOAT (1 << 4) #define ID_RES_440K (1 << 3) #define ID_RES_200K (1 << 2) #define ID_RES_102K (1 << 1) #define ID_RES_GND (1 << 0) #define POWER_CTRL 0xAC #define POWER_CTRL_SET 0xAD #define POWER_CTRL_CLR 0xAE #define POWER_CTRL_OTG_ENAB (1 << 5) #define OTHER_IFC_CTRL2 0xAF #define OTHER_IFC_CTRL2_SET 0xB0 #define OTHER_IFC_CTRL2_CLR 0xB1 #define OTHER_IFC_CTRL2_ULPI_STP_LOW (1 << 4) #define OTHER_IFC_CTRL2_ULPI_TXEN_POL (1 << 3) #define OTHER_IFC_CTRL2_ULPI_4PIN_2430 (1 << 2) #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_MASK (3 << 0) /* bits 0 and 1 */ #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT1N (0 << 0) #define OTHER_IFC_CTRL2_USB_INT_OUTSEL_INT2N (1 << 0) #define REG_CTRL_EN 0xB2 #define REG_CTRL_EN_SET 0xB3 #define REG_CTRL_EN_CLR 0xB4 #define REG_CTRL_ERROR 0xB5 #define ULPI_I2C_CONFLICT_INTEN (1 << 0) #define OTHER_FUNC_CTRL2 0xB8 #define OTHER_FUNC_CTRL2_SET 0xB9 #define OTHER_FUNC_CTRL2_CLR 0xBA #define OTHER_FUNC_CTRL2_VBAT_TIMER_EN (1 << 0) /* following registers do not have separate _clr and _set registers */ #define VBUS_DEBOUNCE 0xC0 #define ID_DEBOUNCE 0xC1 #define VBAT_TIMER 0xD3 #define PHY_PWR_CTRL 0xFD #define PHY_PWR_PHYPWD (1 << 0) #define PHY_CLK_CTRL 0xFE #define PHY_CLK_CTRL_CLOCKGATING_EN (1 << 2) #define PHY_CLK_CTRL_CLK32K_EN (1 << 1) #define REQ_PHY_DPLL_CLK (1 << 0) #define PHY_CLK_CTRL_STS 0xFF #define PHY_DPLL_CLK (1 << 0) /* In module TWL4030_MODULE_PM_MASTER */ #define PROTECT_KEY 0x0E /* In module TWL4030_MODULE_PM_RECEIVER */ #define VUSB_DEDICATED1 0x7D #define VUSB_DEDICATED2 0x7E #define VUSB1V5_DEV_GRP 0x71 #define VUSB1V5_TYPE 0x72 #define VUSB1V5_REMAP 0x73 #define VUSB1V8_DEV_GRP 0x74 #define VUSB1V8_TYPE 0x75 #define VUSB1V8_REMAP 0x76 #define VUSB3V1_DEV_GRP 0x77 #define VUSB3V1_TYPE 0x78 #define VUSB3V1_REMAP 0x79 #define ID_STATUS 0x96 #define ID_RES_FLOAT (1 << 4) /* mini-B */ #define ID_RES_440K (1 << 3) /* type 2 charger */ #define ID_RES_200K (1 << 2) /* 5-wire carkit or type 1 charger */ #define ID_RES_102K (1 << 1) /* phone */ #define ID_RES_GND (1 << 0) /* mini-A */ /* In module TWL4030_MODULE_INTBR */ #define PMBR1 0x0D #define GPIO_USB_4PIN_ULPI_2430C (3 << 0) /* In module TWL4030_MODULE_INT */ #define REG_PWR_ISR1 0x00 #define REG_PWR_IMR1 0x01 #define USB_PRES (1 << 2) #define REG_PWR_EDR1 0x05 #define USB_PRES_FALLING (1 << 4) #define USB_PRES_RISING (1 << 5) #define REG_PWR_SIH_CTRL 0x07 #define COR (1 << 2) /*-------------------------------------------------------------------------*/ struct twl4030_usb { int irq; u8 usb_mode; /* pin configuration */ #define T2_USB_MODE_ULPI 1 /* #define T2_USB_MODE_CEA2011_3PIN 2 */ u8 asleep; }; static struct twl4030_usb *the_transceiver; /*-------------------------------------------------------------------------*/ static int twl4030_i2c_write_u8_verify(u8 module, u8 data, u8 address) { u8 check; if ((twl4030_i2c_write_u8(module, data, address) >= 0) && (twl4030_i2c_read_u8(module, &check, address) >= 0) && (check == data)) return 0; /* Failed once: Try again */ if ((twl4030_i2c_write_u8(module, data, address) >= 0) && (twl4030_i2c_read_u8(module, &check, address) >= 0) && (check == data)) return 0; /* Failed again: Return error */ return -EBUSY; } #define twl4030_usb_write_verify(address, data) \ twl4030_i2c_write_u8_verify(TWL4030_MODULE_USB, (data), (address)) static inline int twl4030_usb_write(u8 address, u8 data) { int ret = 0; ret = twl4030_i2c_write_u8(TWL4030_MODULE_USB, data, address); if (ret >= 0) { #if 0 /* debug */ u8 data1; if (twl4030_i2c_read_u8(TWL4030_MODULE_USB, &data1, address) < 0) printk(KERN_ERR "re-read failed\n"); else printk(KERN_INFO "Write %s wrote %x read %x from reg %x\n", (data1 == data) ? "succeed" : "mismatch", data, data1, address); #endif } else { printk(KERN_WARNING "TWL4030:USB:Write[0x%x] Error %d\n", address, ret); } return ret; } static inline int twl4030_usb_read(u8 address) { u8 data; int ret = 0; ret = twl4030_i2c_read_u8(TWL4030_MODULE_USB, &data, address); if (ret >= 0) { ret = data; } else { printk(KERN_WARNING "TWL4030:USB:Read[0x%x] Error %d\n", address, ret); } return ret; } /*-------------------------------------------------------------------------*/ static inline int twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits) { return twl4030_usb_write(reg + 1, bits); } static inline int twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits) { return twl4030_usb_write(reg + 2, bits); } /*-------------------------------------------------------------------------*/ static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode) { twl->usb_mode = mode; switch (mode) { case T2_USB_MODE_ULPI: twl4030_usb_clear_bits(twl, IFC_CTRL, IFC_CTRL_CARKITMODE); twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); twl4030_usb_clear_bits(twl, FUNC_CTRL, FUNC_CTRL_XCVRSELECT_MASK | FUNC_CTRL_OPMODE_MASK); break; /* case T2_USB_MODE_CEA2011_3PIN: twl4030_cea2011_3_pin_FS_setup(twl); break; */ default: /* FIXME: power on defaults */ break; }; } #ifdef CONFIG_TWL4030_USB_HS_ULPI static void hs_usb_init(struct twl4030_usb *twl) { twl->usb_mode = T2_USB_MODE_ULPI; return; } #endif static void twl4030_i2c_access(int on) { unsigned long timeout; int val = twl4030_usb_read(PHY_CLK_CTRL); if (val >= 0) { if (on) { /* enable DPLL to access PHY registers over I2C */ val |= REQ_PHY_DPLL_CLK; if (twl4030_usb_write_verify(PHY_CLK_CTRL, (u8)val) < 0) { printk(KERN_ERR "twl4030_usb: i2c write failed," " line %d\n", __LINE__); return; } timeout = jiffies + HZ; while (!(twl4030_usb_read(PHY_CLK_CTRL_STS) & PHY_DPLL_CLK) && time_before(jiffies, timeout)) udelay(10); if (!(twl4030_usb_read(PHY_CLK_CTRL_STS) & PHY_DPLL_CLK)) printk(KERN_ERR "Timeout setting T2 HSUSB " "PHY DPLL clock\n"); } else { /* let ULPI control the DPLL clock */ val &= ~REQ_PHY_DPLL_CLK; if (twl4030_usb_write_verify(PHY_CLK_CTRL, (u8)val) < 0) { printk(KERN_ERR "twl4030_usb: i2c write failed," " line %d\n", __LINE__); } } } return; } static void usb_irq_enable(int rising, int falling) { u8 val; /* edge setup */ if (twl4030_i2c_read_u8(TWL4030_MODULE_INT, &val, REG_PWR_EDR1) < 0) { printk(KERN_ERR "twl4030_usb: i2c read failed," " line %d\n", __LINE__); return; } val &= ~(USB_PRES_RISING | USB_PRES_FALLING); if (rising) val = val | USB_PRES_RISING; if (falling) val = val | USB_PRES_FALLING; if (twl4030_i2c_write_u8_verify(TWL4030_MODULE_INT, val, REG_PWR_EDR1) < 0) { printk(KERN_ERR "twl4030_usb: i2c write failed," " line %d\n", __LINE__); return; } /* un-mask interrupt */ if (twl4030_i2c_read_u8(TWL4030_MODULE_INT, &val, REG_PWR_IMR1) < 0) { printk(KERN_ERR "twl4030_usb: i2c read failed," " line %d\n", __LINE__); return; } val &= ~USB_PRES; if (twl4030_i2c_write_u8_verify(TWL4030_MODULE_INT, val, REG_PWR_IMR1) < 0) printk(KERN_ERR "twl4030_usb: i2c write failed," " line %d\n", __LINE__); return; } static void usb_irq_disable(void) { u8 val; /* undo edge setup */ if (twl4030_i2c_read_u8(TWL4030_MODULE_INT, &val, REG_PWR_EDR1) < 0) { printk(KERN_ERR "twl4030_usb: i2c read failed," " line %d\n", __LINE__); return; } val &= ~(USB_PRES_RISING | USB_PRES_FALLING); if (twl4030_i2c_write_u8_verify(TWL4030_MODULE_INT, val, REG_PWR_EDR1) < 0) { printk(KERN_ERR "twl4030_usb: i2c write failed," " line %d\n", __LINE__); return; } /* mask interrupt */ if (twl4030_i2c_read_u8(TWL4030_MODULE_INT, &val, REG_PWR_IMR1) < 0) { printk(KERN_ERR "twl4030_usb: i2c read failed," " line %d\n", __LINE__); return; } val |= USB_PRES; if (twl4030_i2c_write_u8_verify(TWL4030_MODULE_INT, val, REG_PWR_IMR1) < 0) printk(KERN_ERR "twl4030_usb: i2c write failed," " line %d\n", __LINE__); return; } void twl4030_phy_suspend(int controller_off); void twl4030_phy_resume(void); static irqreturn_t twl4030_usb_irq(int irq, void *_twl) { int ret = IRQ_NONE; u8 val; if (twl4030_i2c_read_u8(TWL4030_MODULE_INT, &val, REG_PWR_ISR1) < 0) { printk(KERN_ERR "twl4030_usb: i2c read failed," " line %d\n", __LINE__); goto done; } /* this interrupt line may be shared */ if (!(val & USB_PRES)) goto done; /* clear the interrupt */ twl4030_i2c_write_u8(TWL4030_MODULE_INT, USB_PRES, REG_PWR_ISR1); /* action based on cable attach or detach */ if (twl4030_i2c_read_u8(TWL4030_MODULE_INT, &val, REG_PWR_EDR1) < 0) { printk(KERN_ERR "twl4030_usb: i2c read failed," " line %d\n", __LINE__); goto done; } if (val & USB_PRES_RISING) twl4030_phy_resume(); else twl4030_phy_suspend(0); ret = IRQ_HANDLED; done: return ret; } static void twl4030_phy_power(struct twl4030_usb *twl, int on) { u8 pwr; pwr = twl4030_usb_read(PHY_PWR_CTRL); if (on) { pwr &= ~PHY_PWR_PHYPWD; if (twl4030_usb_write_verify(PHY_PWR_CTRL, pwr) < 0) { printk(KERN_ERR "twl4030_usb: i2c write failed," " line %d\n", __LINE__); return; } twl4030_usb_write(PHY_CLK_CTRL, twl4030_usb_read(PHY_CLK_CTRL) | (PHY_CLK_CTRL_CLOCKGATING_EN | PHY_CLK_CTRL_CLK32K_EN)); } else { pwr |= PHY_PWR_PHYPWD; if (twl4030_usb_write_verify(PHY_PWR_CTRL, pwr) < 0) { printk(KERN_ERR "twl4030_usb: i2c write failed," " line %d\n", __LINE__); } } return; } static void twl4030_usb_ldo_init(struct twl4030_usb *twl) { /* Enable writing to power configuration registers */ twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0xC0, PROTECT_KEY); twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0x0C, PROTECT_KEY); /* put VUSB3V1 LDO in active state */ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2); /* input to VUSB3V1 LDO is from VBAT, not VBUS */ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1); /* turn on 3.1V regulator */ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB3V1_DEV_GRP); twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE); /* turn on 1.5V regulator */ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB1V5_DEV_GRP); twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE); /* turn on 1.8V regulator */ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB1V8_DEV_GRP); twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE); /* disable access to power configuration registers */ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, PROTECT_KEY); } void twl4030_phy_suspend(int controller_off) { struct twl4030_usb *twl = the_transceiver; if (controller_off) usb_irq_disable(); if (twl->asleep) return; if (!controller_off) /* enable rising edge interrupt to detect cable attach */ usb_irq_enable(1, 0); twl4030_phy_power(twl, 0); twl->asleep = 1; return; } EXPORT_SYMBOL(twl4030_phy_suspend); void twl4030_phy_resume(void) { struct twl4030_usb *twl = the_transceiver; if (!twl->asleep) return; /* enable falling edge interrupt to detect cable detach */ usb_irq_enable(0, 1); twl4030_phy_power(twl, 1); twl4030_i2c_access(1); twl4030_usb_set_mode(twl, twl->usb_mode); if (twl->usb_mode == T2_USB_MODE_ULPI) twl4030_i2c_access(0); twl->asleep = 0; return; } EXPORT_SYMBOL(twl4030_phy_resume); static int __init twl4030_usb_init(void) { struct twl4030_usb *twl; int status; if (the_transceiver) return 0; twl = kzalloc(sizeof *twl, GFP_KERNEL); if (!twl) return 0; the_transceiver = twl; twl->irq = TWL4030_MODIRQ_PWR; usb_irq_disable(); status = request_irq(twl->irq, twl4030_usb_irq, IRQF_DISABLED | IRQF_SHARED, "twl4030_usb", twl); if (status < 0) { printk(KERN_DEBUG "can't get IRQ %d, err %d\n", twl->irq, status); kfree(twl); return -ENODEV; } #if defined(CONFIG_TWL4030_USB_HS_ULPI) hs_usb_init(twl); #endif twl4030_usb_ldo_init(twl); twl4030_phy_power(twl, 1); twl4030_i2c_access(1); twl4030_usb_set_mode(twl, twl->usb_mode); if (twl->usb_mode == T2_USB_MODE_ULPI) twl4030_i2c_access(0); twl->asleep = 0; if (twl->usb_mode == T2_USB_MODE_ULPI) twl4030_phy_suspend(1); printk(KERN_INFO "Initialized TWL4030 USB module"); return 0; } static void __exit twl4030_usb_exit(void) { struct twl4030_usb *twl = the_transceiver; int val; usb_irq_disable(); free_irq(twl->irq, twl); /* set transceiver mode to power on defaults */ twl4030_usb_set_mode(twl, -1); /* autogate 60MHz ULPI clock, * clear dpll clock request for i2c access, * disable 32KHz */ val = twl4030_usb_read(PHY_CLK_CTRL); if (val >= 0) { val |= PHY_CLK_CTRL_CLOCKGATING_EN; val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK); twl4030_usb_write(PHY_CLK_CTRL, (u8)val); } /* disable complete OTG block */ twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); twl4030_phy_power(twl, 0); kfree(twl); } subsys_initcall(twl4030_usb_init); module_exit(twl4030_usb_exit); MODULE_AUTHOR("Texas Instruments, Inc."); MODULE_DESCRIPTION("TWL4030 USB transceiver driver"); MODULE_LICENSE("GPL");