Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 1 | /* |
| 2 | * twl6030_usb - TWL6030 USB transceiver, talking to OMAP OTG driver. |
| 3 | * |
| 4 | * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * Author: Hema HK <hemahk@ti.com> |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/init.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/platform_device.h> |
| 27 | #include <linux/io.h> |
| 28 | #include <linux/usb/otg.h> |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 29 | #include <linux/usb/musb-omap.h> |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 30 | #include <linux/i2c/twl.h> |
| 31 | #include <linux/regulator/consumer.h> |
| 32 | #include <linux/err.h> |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 33 | #include <linux/slab.h> |
Hema HK | 603ab52 | 2011-03-22 16:54:21 +0530 | [diff] [blame] | 34 | #include <linux/delay.h> |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 35 | |
| 36 | /* usb register definitions */ |
| 37 | #define USB_VENDOR_ID_LSB 0x00 |
| 38 | #define USB_VENDOR_ID_MSB 0x01 |
| 39 | #define USB_PRODUCT_ID_LSB 0x02 |
| 40 | #define USB_PRODUCT_ID_MSB 0x03 |
| 41 | #define USB_VBUS_CTRL_SET 0x04 |
| 42 | #define USB_VBUS_CTRL_CLR 0x05 |
| 43 | #define USB_ID_CTRL_SET 0x06 |
| 44 | #define USB_ID_CTRL_CLR 0x07 |
| 45 | #define USB_VBUS_INT_SRC 0x08 |
| 46 | #define USB_VBUS_INT_LATCH_SET 0x09 |
| 47 | #define USB_VBUS_INT_LATCH_CLR 0x0A |
| 48 | #define USB_VBUS_INT_EN_LO_SET 0x0B |
| 49 | #define USB_VBUS_INT_EN_LO_CLR 0x0C |
| 50 | #define USB_VBUS_INT_EN_HI_SET 0x0D |
| 51 | #define USB_VBUS_INT_EN_HI_CLR 0x0E |
| 52 | #define USB_ID_INT_SRC 0x0F |
| 53 | #define USB_ID_INT_LATCH_SET 0x10 |
| 54 | #define USB_ID_INT_LATCH_CLR 0x11 |
| 55 | |
| 56 | #define USB_ID_INT_EN_LO_SET 0x12 |
| 57 | #define USB_ID_INT_EN_LO_CLR 0x13 |
| 58 | #define USB_ID_INT_EN_HI_SET 0x14 |
| 59 | #define USB_ID_INT_EN_HI_CLR 0x15 |
| 60 | #define USB_OTG_ADP_CTRL 0x16 |
| 61 | #define USB_OTG_ADP_HIGH 0x17 |
| 62 | #define USB_OTG_ADP_LOW 0x18 |
| 63 | #define USB_OTG_ADP_RISE 0x19 |
| 64 | #define USB_OTG_REVISION 0x1A |
| 65 | |
| 66 | /* to be moved to LDO */ |
| 67 | #define TWL6030_MISC2 0xE5 |
| 68 | #define TWL6030_CFG_LDO_PD2 0xF5 |
| 69 | #define TWL6030_BACKUP_REG 0xFA |
| 70 | |
| 71 | #define STS_HW_CONDITIONS 0x21 |
| 72 | |
| 73 | /* In module TWL6030_MODULE_PM_MASTER */ |
| 74 | #define STS_HW_CONDITIONS 0x21 |
| 75 | #define STS_USB_ID BIT(2) |
| 76 | |
| 77 | /* In module TWL6030_MODULE_PM_RECEIVER */ |
| 78 | #define VUSB_CFG_TRANS 0x71 |
| 79 | #define VUSB_CFG_STATE 0x72 |
| 80 | #define VUSB_CFG_VOLTAGE 0x73 |
| 81 | |
| 82 | /* in module TWL6030_MODULE_MAIN_CHARGE */ |
| 83 | |
| 84 | #define CHARGERUSB_CTRL1 0x8 |
| 85 | |
| 86 | #define CONTROLLER_STAT1 0x03 |
| 87 | #define VBUS_DET BIT(2) |
| 88 | |
| 89 | struct twl6030_usb { |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 90 | struct usb_phy phy; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 91 | struct device *dev; |
| 92 | |
| 93 | /* for vbus reporting with irqs disabled */ |
| 94 | spinlock_t lock; |
| 95 | |
| 96 | struct regulator *usb3v3; |
| 97 | |
Moiz Sonasath | 5bf5450 | 2011-06-27 10:01:01 -0500 | [diff] [blame] | 98 | /* used to set vbus, in atomic path */ |
| 99 | struct work_struct set_vbus_work; |
| 100 | |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 101 | int irq1; |
| 102 | int irq2; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 103 | enum omap_musb_vbus_id_status linkstat; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 104 | u8 asleep; |
| 105 | bool irq_enabled; |
Moiz Sonasath | 5bf5450 | 2011-06-27 10:01:01 -0500 | [diff] [blame] | 106 | bool vbus_enable; |
Graeme Gregory | 5ccee4a | 2011-05-22 21:21:24 +0100 | [diff] [blame] | 107 | unsigned long features; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 108 | }; |
| 109 | |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 110 | #define phy_to_twl(x) container_of((x), struct twl6030_usb, phy) |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 111 | |
| 112 | /*-------------------------------------------------------------------------*/ |
| 113 | |
| 114 | static inline int twl6030_writeb(struct twl6030_usb *twl, u8 module, |
| 115 | u8 data, u8 address) |
| 116 | { |
| 117 | int ret = 0; |
| 118 | |
| 119 | ret = twl_i2c_write_u8(module, data, address); |
| 120 | if (ret < 0) |
| 121 | dev_err(twl->dev, |
| 122 | "Write[0x%x] Error %d\n", address, ret); |
| 123 | return ret; |
| 124 | } |
| 125 | |
| 126 | static inline u8 twl6030_readb(struct twl6030_usb *twl, u8 module, u8 address) |
| 127 | { |
| 128 | u8 data, ret = 0; |
| 129 | |
| 130 | ret = twl_i2c_read_u8(module, &data, address); |
| 131 | if (ret >= 0) |
| 132 | ret = data; |
| 133 | else |
| 134 | dev_err(twl->dev, |
| 135 | "readb[0x%x,0x%x] Error %d\n", |
| 136 | module, address, ret); |
| 137 | return ret; |
| 138 | } |
| 139 | |
Heikki Krogerus | 8675381 | 2012-02-13 13:24:02 +0200 | [diff] [blame] | 140 | static int twl6030_phy_init(struct usb_phy *x) |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 141 | { |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 142 | struct twl6030_usb *twl; |
| 143 | struct device *dev; |
| 144 | struct twl4030_usb_data *pdata; |
| 145 | |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 146 | twl = phy_to_twl(x); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 147 | dev = twl->dev; |
| 148 | pdata = dev->platform_data; |
| 149 | |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 150 | if (twl->linkstat == OMAP_MUSB_ID_GROUND) |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 151 | pdata->phy_power(twl->dev, 1, 1); |
| 152 | else |
| 153 | pdata->phy_power(twl->dev, 0, 1); |
| 154 | |
| 155 | return 0; |
| 156 | } |
| 157 | |
Heikki Krogerus | 8675381 | 2012-02-13 13:24:02 +0200 | [diff] [blame] | 158 | static void twl6030_phy_shutdown(struct usb_phy *x) |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 159 | { |
| 160 | struct twl6030_usb *twl; |
| 161 | struct device *dev; |
| 162 | struct twl4030_usb_data *pdata; |
| 163 | |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 164 | twl = phy_to_twl(x); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 165 | dev = twl->dev; |
| 166 | pdata = dev->platform_data; |
| 167 | pdata->phy_power(twl->dev, 0, 0); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 168 | } |
| 169 | |
Heikki Krogerus | 8675381 | 2012-02-13 13:24:02 +0200 | [diff] [blame] | 170 | static int twl6030_phy_suspend(struct usb_phy *x, int suspend) |
Hema HK | 070b8ed | 2011-02-17 12:06:08 +0530 | [diff] [blame] | 171 | { |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 172 | struct twl6030_usb *twl = phy_to_twl(x); |
Hema HK | 070b8ed | 2011-02-17 12:06:08 +0530 | [diff] [blame] | 173 | struct device *dev = twl->dev; |
| 174 | struct twl4030_usb_data *pdata = dev->platform_data; |
| 175 | |
| 176 | pdata->phy_suspend(dev, suspend); |
| 177 | |
| 178 | return 0; |
| 179 | } |
| 180 | |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 181 | static int twl6030_start_srp(struct usb_otg *otg) |
Hema HK | 603ab52 | 2011-03-22 16:54:21 +0530 | [diff] [blame] | 182 | { |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 183 | struct twl6030_usb *twl = phy_to_twl(otg->phy); |
Hema HK | 603ab52 | 2011-03-22 16:54:21 +0530 | [diff] [blame] | 184 | |
| 185 | twl6030_writeb(twl, TWL_MODULE_USB, 0x24, USB_VBUS_CTRL_SET); |
| 186 | twl6030_writeb(twl, TWL_MODULE_USB, 0x84, USB_VBUS_CTRL_SET); |
| 187 | |
| 188 | mdelay(100); |
| 189 | twl6030_writeb(twl, TWL_MODULE_USB, 0xa0, USB_VBUS_CTRL_CLR); |
| 190 | |
| 191 | return 0; |
| 192 | } |
| 193 | |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 194 | static int twl6030_usb_ldo_init(struct twl6030_usb *twl) |
| 195 | { |
Graeme Gregory | 5ccee4a | 2011-05-22 21:21:24 +0100 | [diff] [blame] | 196 | char *regulator_name; |
| 197 | |
| 198 | if (twl->features & TWL6025_SUBCLASS) |
| 199 | regulator_name = "ldousb"; |
| 200 | else |
| 201 | regulator_name = "vusb"; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 202 | |
| 203 | /* Set to OTG_REV 1.3 and turn on the ID_WAKEUP_COMP */ |
| 204 | twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_BACKUP_REG); |
| 205 | |
| 206 | /* Program CFG_LDO_PD2 register and set VUSB bit */ |
| 207 | twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x1, TWL6030_CFG_LDO_PD2); |
| 208 | |
| 209 | /* Program MISC2 register and set bit VUSB_IN_VBAT */ |
| 210 | twl6030_writeb(twl, TWL6030_MODULE_ID0 , 0x10, TWL6030_MISC2); |
| 211 | |
Graeme Gregory | 5ccee4a | 2011-05-22 21:21:24 +0100 | [diff] [blame] | 212 | twl->usb3v3 = regulator_get(twl->dev, regulator_name); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 213 | if (IS_ERR(twl->usb3v3)) |
| 214 | return -ENODEV; |
| 215 | |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 216 | /* Program the USB_VBUS_CTRL_SET and set VBUS_ACT_COMP bit */ |
| 217 | twl6030_writeb(twl, TWL_MODULE_USB, 0x4, USB_VBUS_CTRL_SET); |
| 218 | |
| 219 | /* |
| 220 | * Program the USB_ID_CTRL_SET register to enable GND drive |
| 221 | * and the ID comparators |
| 222 | */ |
| 223 | twl6030_writeb(twl, TWL_MODULE_USB, 0x14, USB_ID_CTRL_SET); |
| 224 | |
| 225 | return 0; |
| 226 | } |
| 227 | |
| 228 | static ssize_t twl6030_usb_vbus_show(struct device *dev, |
| 229 | struct device_attribute *attr, char *buf) |
| 230 | { |
| 231 | struct twl6030_usb *twl = dev_get_drvdata(dev); |
| 232 | unsigned long flags; |
| 233 | int ret = -EINVAL; |
| 234 | |
| 235 | spin_lock_irqsave(&twl->lock, flags); |
| 236 | |
| 237 | switch (twl->linkstat) { |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 238 | case OMAP_MUSB_VBUS_VALID: |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 239 | ret = snprintf(buf, PAGE_SIZE, "vbus\n"); |
| 240 | break; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 241 | case OMAP_MUSB_ID_GROUND: |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 242 | ret = snprintf(buf, PAGE_SIZE, "id\n"); |
| 243 | break; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 244 | case OMAP_MUSB_VBUS_OFF: |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 245 | ret = snprintf(buf, PAGE_SIZE, "none\n"); |
| 246 | break; |
| 247 | default: |
| 248 | ret = snprintf(buf, PAGE_SIZE, "UNKNOWN\n"); |
| 249 | } |
| 250 | spin_unlock_irqrestore(&twl->lock, flags); |
| 251 | |
| 252 | return ret; |
| 253 | } |
| 254 | static DEVICE_ATTR(vbus, 0444, twl6030_usb_vbus_show, NULL); |
| 255 | |
| 256 | static irqreturn_t twl6030_usb_irq(int irq, void *_twl) |
| 257 | { |
| 258 | struct twl6030_usb *twl = _twl; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 259 | enum omap_musb_vbus_id_status status = OMAP_MUSB_UNKNOWN; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 260 | u8 vbus_state, hw_state; |
| 261 | |
| 262 | hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS); |
| 263 | |
| 264 | vbus_state = twl6030_readb(twl, TWL_MODULE_MAIN_CHARGE, |
| 265 | CONTROLLER_STAT1); |
| 266 | if (!(hw_state & STS_USB_ID)) { |
| 267 | if (vbus_state & VBUS_DET) { |
Hema HK | 6dc2503 | 2011-02-17 12:06:04 +0530 | [diff] [blame] | 268 | regulator_enable(twl->usb3v3); |
| 269 | twl->asleep = 1; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 270 | status = OMAP_MUSB_VBUS_VALID; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 271 | twl->linkstat = status; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 272 | omap_musb_mailbox(status); |
Hema HK | 6dc2503 | 2011-02-17 12:06:04 +0530 | [diff] [blame] | 273 | } else { |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 274 | if (twl->linkstat != OMAP_MUSB_UNKNOWN) { |
| 275 | status = OMAP_MUSB_VBUS_OFF; |
| 276 | twl->linkstat = status; |
| 277 | omap_musb_mailbox(status); |
| 278 | if (twl->asleep) { |
| 279 | regulator_disable(twl->usb3v3); |
| 280 | twl->asleep = 0; |
| 281 | } |
Hema HK | 6dc2503 | 2011-02-17 12:06:04 +0530 | [diff] [blame] | 282 | } |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 283 | } |
| 284 | } |
| 285 | sysfs_notify(&twl->dev->kobj, NULL, "vbus"); |
| 286 | |
| 287 | return IRQ_HANDLED; |
| 288 | } |
| 289 | |
| 290 | static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl) |
| 291 | { |
| 292 | struct twl6030_usb *twl = _twl; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 293 | enum omap_musb_vbus_id_status status = OMAP_MUSB_UNKNOWN; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 294 | u8 hw_state; |
| 295 | |
| 296 | hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS); |
| 297 | |
| 298 | if (hw_state & STS_USB_ID) { |
| 299 | |
Hema HK | 6dc2503 | 2011-02-17 12:06:04 +0530 | [diff] [blame] | 300 | regulator_enable(twl->usb3v3); |
| 301 | twl->asleep = 1; |
Moiz Sonasath | dc8738d | 2012-06-12 20:17:12 +0300 | [diff] [blame] | 302 | twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_CLR); |
| 303 | twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_SET); |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 304 | status = OMAP_MUSB_ID_GROUND; |
Hema HK | 31e9992 | 2011-02-17 12:06:05 +0530 | [diff] [blame] | 305 | twl->linkstat = status; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 306 | omap_musb_mailbox(status); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 307 | } else { |
Moiz Sonasath | dc8738d | 2012-06-12 20:17:12 +0300 | [diff] [blame] | 308 | twl6030_writeb(twl, TWL_MODULE_USB, 0x10, USB_ID_INT_EN_HI_CLR); |
| 309 | twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 310 | } |
Moiz Sonasath | dc8738d | 2012-06-12 20:17:12 +0300 | [diff] [blame] | 311 | twl6030_writeb(twl, TWL_MODULE_USB, status, USB_ID_INT_LATCH_CLR); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 312 | |
| 313 | return IRQ_HANDLED; |
| 314 | } |
| 315 | |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 316 | static int twl6030_set_peripheral(struct usb_otg *otg, |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 317 | struct usb_gadget *gadget) |
| 318 | { |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 319 | if (!otg) |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 320 | return -ENODEV; |
| 321 | |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 322 | otg->gadget = gadget; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 323 | if (!gadget) |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 324 | otg->phy->state = OTG_STATE_UNDEFINED; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 325 | |
| 326 | return 0; |
| 327 | } |
| 328 | |
Heikki Krogerus | 8675381 | 2012-02-13 13:24:02 +0200 | [diff] [blame] | 329 | static int twl6030_enable_irq(struct usb_phy *x) |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 330 | { |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 331 | struct twl6030_usb *twl = phy_to_twl(x); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 332 | |
Moiz Sonasath | dc8738d | 2012-06-12 20:17:12 +0300 | [diff] [blame] | 333 | twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 334 | twl6030_interrupt_unmask(0x05, REG_INT_MSK_LINE_C); |
| 335 | twl6030_interrupt_unmask(0x05, REG_INT_MSK_STS_C); |
| 336 | |
| 337 | twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK, |
| 338 | REG_INT_MSK_LINE_C); |
| 339 | twl6030_interrupt_unmask(TWL6030_CHARGER_CTRL_INT_MASK, |
| 340 | REG_INT_MSK_STS_C); |
| 341 | twl6030_usb_irq(twl->irq2, twl); |
| 342 | twl6030_usbotg_irq(twl->irq1, twl); |
| 343 | |
| 344 | return 0; |
| 345 | } |
| 346 | |
Moiz Sonasath | 5bf5450 | 2011-06-27 10:01:01 -0500 | [diff] [blame] | 347 | static void otg_set_vbus_work(struct work_struct *data) |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 348 | { |
Moiz Sonasath | 5bf5450 | 2011-06-27 10:01:01 -0500 | [diff] [blame] | 349 | struct twl6030_usb *twl = container_of(data, struct twl6030_usb, |
| 350 | set_vbus_work); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 351 | |
| 352 | /* |
| 353 | * Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1 |
| 354 | * register. This enables boost mode. |
| 355 | */ |
Moiz Sonasath | 5bf5450 | 2011-06-27 10:01:01 -0500 | [diff] [blame] | 356 | |
| 357 | if (twl->vbus_enable) |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 358 | twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x40, |
Moiz Sonasath | 5bf5450 | 2011-06-27 10:01:01 -0500 | [diff] [blame] | 359 | CHARGERUSB_CTRL1); |
| 360 | else |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 361 | twl6030_writeb(twl, TWL_MODULE_MAIN_CHARGE , 0x00, |
Moiz Sonasath | 5bf5450 | 2011-06-27 10:01:01 -0500 | [diff] [blame] | 362 | CHARGERUSB_CTRL1); |
| 363 | } |
| 364 | |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 365 | static int twl6030_set_vbus(struct usb_otg *otg, bool enabled) |
Moiz Sonasath | 5bf5450 | 2011-06-27 10:01:01 -0500 | [diff] [blame] | 366 | { |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 367 | struct twl6030_usb *twl = phy_to_twl(otg->phy); |
Moiz Sonasath | 5bf5450 | 2011-06-27 10:01:01 -0500 | [diff] [blame] | 368 | |
| 369 | twl->vbus_enable = enabled; |
| 370 | schedule_work(&twl->set_vbus_work); |
| 371 | |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 372 | return 0; |
| 373 | } |
| 374 | |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 375 | static int twl6030_set_host(struct usb_otg *otg, struct usb_bus *host) |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 376 | { |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 377 | if (!otg) |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 378 | return -ENODEV; |
| 379 | |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 380 | otg->host = host; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 381 | if (!host) |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 382 | otg->phy->state = OTG_STATE_UNDEFINED; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 383 | return 0; |
| 384 | } |
| 385 | |
| 386 | static int __devinit twl6030_usb_probe(struct platform_device *pdev) |
| 387 | { |
| 388 | struct twl6030_usb *twl; |
| 389 | int status, err; |
| 390 | struct twl4030_usb_data *pdata; |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 391 | struct usb_otg *otg; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 392 | struct device *dev = &pdev->dev; |
| 393 | pdata = dev->platform_data; |
| 394 | |
Kishon Vijay Abraham I | b8a3efa | 2012-06-22 17:40:55 +0530 | [diff] [blame] | 395 | twl = devm_kzalloc(dev, sizeof *twl, GFP_KERNEL); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 396 | if (!twl) |
| 397 | return -ENOMEM; |
| 398 | |
Kishon Vijay Abraham I | b8a3efa | 2012-06-22 17:40:55 +0530 | [diff] [blame] | 399 | otg = devm_kzalloc(dev, sizeof *otg, GFP_KERNEL); |
| 400 | if (!otg) |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 401 | return -ENOMEM; |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 402 | |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 403 | twl->dev = &pdev->dev; |
| 404 | twl->irq1 = platform_get_irq(pdev, 0); |
| 405 | twl->irq2 = platform_get_irq(pdev, 1); |
Graeme Gregory | 5ccee4a | 2011-05-22 21:21:24 +0100 | [diff] [blame] | 406 | twl->features = pdata->features; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 407 | twl->linkstat = OMAP_MUSB_UNKNOWN; |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 408 | |
| 409 | twl->phy.dev = twl->dev; |
| 410 | twl->phy.label = "twl6030"; |
| 411 | twl->phy.otg = otg; |
| 412 | twl->phy.init = twl6030_phy_init; |
| 413 | twl->phy.shutdown = twl6030_phy_shutdown; |
| 414 | twl->phy.set_suspend = twl6030_phy_suspend; |
| 415 | |
| 416 | otg->phy = &twl->phy; |
| 417 | otg->set_host = twl6030_set_host; |
| 418 | otg->set_peripheral = twl6030_set_peripheral; |
| 419 | otg->set_vbus = twl6030_set_vbus; |
| 420 | otg->start_srp = twl6030_start_srp; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 421 | |
| 422 | /* init spinlock for workqueue */ |
| 423 | spin_lock_init(&twl->lock); |
| 424 | |
| 425 | err = twl6030_usb_ldo_init(twl); |
| 426 | if (err) { |
| 427 | dev_err(&pdev->dev, "ldo init failed\n"); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 428 | return err; |
| 429 | } |
Kishon Vijay Abraham I | 662dca5 | 2012-06-22 17:02:46 +0530 | [diff] [blame] | 430 | usb_add_phy(&twl->phy, USB_PHY_TYPE_USB2); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 431 | |
| 432 | platform_set_drvdata(pdev, twl); |
| 433 | if (device_create_file(&pdev->dev, &dev_attr_vbus)) |
| 434 | dev_warn(&pdev->dev, "could not create sysfs file\n"); |
| 435 | |
Moiz Sonasath | 5bf5450 | 2011-06-27 10:01:01 -0500 | [diff] [blame] | 436 | INIT_WORK(&twl->set_vbus_work, otg_set_vbus_work); |
| 437 | |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 438 | twl->irq_enabled = true; |
| 439 | status = request_threaded_irq(twl->irq1, NULL, twl6030_usbotg_irq, |
Ming Lei | 8f9d973 | 2012-05-17 11:38:24 +0800 | [diff] [blame] | 440 | IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 441 | "twl6030_usb", twl); |
| 442 | if (status < 0) { |
| 443 | dev_err(&pdev->dev, "can't get IRQ %d, err %d\n", |
| 444 | twl->irq1, status); |
| 445 | device_remove_file(twl->dev, &dev_attr_vbus); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 446 | return status; |
| 447 | } |
| 448 | |
| 449 | status = request_threaded_irq(twl->irq2, NULL, twl6030_usb_irq, |
Ming Lei | 8f9d973 | 2012-05-17 11:38:24 +0800 | [diff] [blame] | 450 | IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 451 | "twl6030_usb", twl); |
| 452 | if (status < 0) { |
| 453 | dev_err(&pdev->dev, "can't get IRQ %d, err %d\n", |
| 454 | twl->irq2, status); |
| 455 | free_irq(twl->irq1, twl); |
| 456 | device_remove_file(twl->dev, &dev_attr_vbus); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 457 | return status; |
| 458 | } |
| 459 | |
Hema HK | 6dc2503 | 2011-02-17 12:06:04 +0530 | [diff] [blame] | 460 | twl->asleep = 0; |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 461 | pdata->phy_init(dev); |
Heikki Krogerus | 46b8f6b | 2012-02-13 13:24:12 +0200 | [diff] [blame] | 462 | twl6030_phy_suspend(&twl->phy, 0); |
| 463 | twl6030_enable_irq(&twl->phy); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 464 | dev_info(&pdev->dev, "Initialized TWL6030 USB module\n"); |
| 465 | |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | static int __exit twl6030_usb_remove(struct platform_device *pdev) |
| 470 | { |
| 471 | struct twl6030_usb *twl = platform_get_drvdata(pdev); |
| 472 | |
| 473 | struct twl4030_usb_data *pdata; |
| 474 | struct device *dev = &pdev->dev; |
| 475 | pdata = dev->platform_data; |
| 476 | |
| 477 | twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK, |
| 478 | REG_INT_MSK_LINE_C); |
| 479 | twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK, |
| 480 | REG_INT_MSK_STS_C); |
| 481 | free_irq(twl->irq1, twl); |
| 482 | free_irq(twl->irq2, twl); |
| 483 | regulator_put(twl->usb3v3); |
| 484 | pdata->phy_exit(twl->dev); |
| 485 | device_remove_file(twl->dev, &dev_attr_vbus); |
Moiz Sonasath | 5bf5450 | 2011-06-27 10:01:01 -0500 | [diff] [blame] | 486 | cancel_work_sync(&twl->set_vbus_work); |
Hema HK | c33fad0 | 2010-12-10 17:58:20 +0530 | [diff] [blame] | 487 | |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | static struct platform_driver twl6030_usb_driver = { |
| 492 | .probe = twl6030_usb_probe, |
| 493 | .remove = __exit_p(twl6030_usb_remove), |
| 494 | .driver = { |
| 495 | .name = "twl6030_usb", |
| 496 | .owner = THIS_MODULE, |
| 497 | }, |
| 498 | }; |
| 499 | |
| 500 | static int __init twl6030_usb_init(void) |
| 501 | { |
| 502 | return platform_driver_register(&twl6030_usb_driver); |
| 503 | } |
| 504 | subsys_initcall(twl6030_usb_init); |
| 505 | |
| 506 | static void __exit twl6030_usb_exit(void) |
| 507 | { |
| 508 | platform_driver_unregister(&twl6030_usb_driver); |
| 509 | } |
| 510 | module_exit(twl6030_usb_exit); |
| 511 | |
| 512 | MODULE_ALIAS("platform:twl6030_usb"); |
| 513 | MODULE_AUTHOR("Hema HK <hemahk@ti.com>"); |
| 514 | MODULE_DESCRIPTION("TWL6030 USB transceiver driver"); |
| 515 | MODULE_LICENSE("GPL"); |