David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 1 | /* |
| 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> |
| 31 | #include <linux/spinlock.h> |
| 32 | #include <linux/workqueue.h> |
| 33 | #include <linux/io.h> |
| 34 | #include <linux/delay.h> |
| 35 | #include <linux/usb/otg.h> |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 36 | #include <linux/phy/phy.h> |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 37 | #include <linux/usb/musb-omap.h> |
Heikki Krogerus | 92a6e6b | 2010-03-31 10:18:05 +0300 | [diff] [blame] | 38 | #include <linux/usb/ulpi.h> |
Santosh Shilimkar | b07682b | 2009-12-13 20:05:51 +0100 | [diff] [blame] | 39 | #include <linux/i2c/twl.h> |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 40 | #include <linux/regulator/consumer.h> |
| 41 | #include <linux/err.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 42 | #include <linux/slab.h> |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 43 | |
| 44 | /* Register defines */ |
| 45 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 46 | #define MCPC_CTRL 0x30 |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 47 | #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 Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 56 | #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 Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 64 | #define MCPC_CTRL2_MCPC_CK_EN (1 << 0) |
| 65 | |
| 66 | #define OTHER_FUNC_CTRL 0x80 |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 67 | #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 Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 71 | #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 Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 79 | #define OTHER_INT_EN_FALL 0x89 |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 80 | #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 Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 97 | #define POWER_CTRL_OTG_ENAB (1 << 5) |
| 98 | |
| 99 | #define OTHER_IFC_CTRL2 0xAF |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 100 | #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 Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 108 | #define REG_CTRL_ERROR 0xB5 |
| 109 | #define ULPI_I2C_CONFLICT_INTEN (1 << 0) |
| 110 | |
| 111 | #define OTHER_FUNC_CTRL2 0xB8 |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 112 | #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 Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 127 | /* In module TWL_MODULE_PM_MASTER */ |
David Brownell | def6f8b | 2009-03-31 12:26:10 -0700 | [diff] [blame] | 128 | #define STS_HW_CONDITIONS 0x0F |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 129 | |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 130 | /* In module TWL_MODULE_PM_RECEIVER */ |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 131 | #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 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 147 | struct twl4030_usb { |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 148 | struct usb_phy phy; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 149 | struct device *dev; |
| 150 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 151 | /* TWL4030 internal USB regulator supplies */ |
| 152 | struct regulator *usb1v5; |
| 153 | struct regulator *usb1v8; |
| 154 | struct regulator *usb3v1; |
| 155 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 156 | /* for vbus reporting with irqs disabled */ |
| 157 | spinlock_t lock; |
| 158 | |
| 159 | /* pin configuration */ |
| 160 | enum twl4030_usb_mode usb_mode; |
| 161 | |
| 162 | int irq; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 163 | enum omap_musb_vbus_id_status linkstat; |
Matthias Kaehlcke | a87103a | 2011-04-01 23:02:07 +0200 | [diff] [blame] | 164 | bool vbus_supplied; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 165 | u8 asleep; |
| 166 | bool irq_enabled; |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 167 | |
| 168 | struct delayed_work id_workaround_work; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 169 | }; |
| 170 | |
| 171 | /* internal define on top of container_of */ |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 172 | #define phy_to_twl(x) container_of((x), struct twl4030_usb, phy) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 173 | |
| 174 | /*-------------------------------------------------------------------------*/ |
| 175 | |
| 176 | static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl, |
| 177 | u8 module, u8 data, u8 address) |
| 178 | { |
| 179 | u8 check; |
| 180 | |
Balaji T K | fc7b92f | 2009-12-13 21:23:33 +0100 | [diff] [blame] | 181 | if ((twl_i2c_write_u8(module, data, address) >= 0) && |
| 182 | (twl_i2c_read_u8(module, &check, address) >= 0) && |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 183 | (check == data)) |
| 184 | return 0; |
| 185 | dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n", |
| 186 | 1, module, address, check, data); |
| 187 | |
| 188 | /* Failed once: Try again */ |
Balaji T K | fc7b92f | 2009-12-13 21:23:33 +0100 | [diff] [blame] | 189 | if ((twl_i2c_write_u8(module, data, address) >= 0) && |
| 190 | (twl_i2c_read_u8(module, &check, address) >= 0) && |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 191 | (check == data)) |
| 192 | return 0; |
| 193 | dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n", |
| 194 | 2, module, address, check, data); |
| 195 | |
| 196 | /* Failed again: Return error */ |
| 197 | return -EBUSY; |
| 198 | } |
| 199 | |
| 200 | #define twl4030_usb_write_verify(twl, address, data) \ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 201 | twl4030_i2c_write_u8_verify(twl, TWL_MODULE_USB, (data), (address)) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 202 | |
| 203 | static inline int twl4030_usb_write(struct twl4030_usb *twl, |
| 204 | u8 address, u8 data) |
| 205 | { |
| 206 | int ret = 0; |
| 207 | |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 208 | ret = twl_i2c_write_u8(TWL_MODULE_USB, data, address); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 209 | if (ret < 0) |
| 210 | dev_dbg(twl->dev, |
| 211 | "TWL4030:USB:Write[0x%x] Error %d\n", address, ret); |
| 212 | return ret; |
| 213 | } |
| 214 | |
| 215 | static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address) |
| 216 | { |
| 217 | u8 data; |
| 218 | int ret = 0; |
| 219 | |
Balaji T K | fc7b92f | 2009-12-13 21:23:33 +0100 | [diff] [blame] | 220 | ret = twl_i2c_read_u8(module, &data, address); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 221 | if (ret >= 0) |
| 222 | ret = data; |
| 223 | else |
| 224 | dev_dbg(twl->dev, |
| 225 | "TWL4030:readb[0x%x,0x%x] Error %d\n", |
| 226 | module, address, ret); |
| 227 | |
| 228 | return ret; |
| 229 | } |
| 230 | |
| 231 | static inline int twl4030_usb_read(struct twl4030_usb *twl, u8 address) |
| 232 | { |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 233 | return twl4030_readb(twl, TWL_MODULE_USB, address); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | /*-------------------------------------------------------------------------*/ |
| 237 | |
| 238 | static inline int |
| 239 | twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits) |
| 240 | { |
Heikki Krogerus | 92a6e6b | 2010-03-31 10:18:05 +0300 | [diff] [blame] | 241 | return twl4030_usb_write(twl, ULPI_SET(reg), bits); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | static inline int |
| 245 | twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits) |
| 246 | { |
Heikki Krogerus | 92a6e6b | 2010-03-31 10:18:05 +0300 | [diff] [blame] | 247 | return twl4030_usb_write(twl, ULPI_CLR(reg), bits); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 248 | } |
| 249 | |
| 250 | /*-------------------------------------------------------------------------*/ |
| 251 | |
Grazvydas Ignotas | f65f4f4 | 2013-03-24 17:36:53 +0200 | [diff] [blame] | 252 | static bool twl4030_is_driving_vbus(struct twl4030_usb *twl) |
| 253 | { |
| 254 | int ret; |
| 255 | |
| 256 | ret = twl4030_usb_read(twl, PHY_CLK_CTRL_STS); |
| 257 | if (ret < 0 || !(ret & PHY_DPLL_CLK)) |
| 258 | /* |
| 259 | * if clocks are off, registers are not updated, |
| 260 | * but we can assume we don't drive VBUS in this case |
| 261 | */ |
| 262 | return false; |
| 263 | |
| 264 | ret = twl4030_usb_read(twl, ULPI_OTG_CTRL); |
| 265 | if (ret < 0) |
| 266 | return false; |
| 267 | |
| 268 | return (ret & (ULPI_OTG_DRVVBUS | ULPI_OTG_CHRGVBUS)) ? true : false; |
| 269 | } |
| 270 | |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 271 | static enum omap_musb_vbus_id_status |
| 272 | twl4030_usb_linkstat(struct twl4030_usb *twl) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 273 | { |
| 274 | int status; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 275 | enum omap_musb_vbus_id_status linkstat = OMAP_MUSB_UNKNOWN; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 276 | |
Matthias Kaehlcke | a87103a | 2011-04-01 23:02:07 +0200 | [diff] [blame] | 277 | twl->vbus_supplied = false; |
| 278 | |
David Brownell | def6f8b | 2009-03-31 12:26:10 -0700 | [diff] [blame] | 279 | /* |
| 280 | * For ID/VBUS sensing, see manual section 15.4.8 ... |
| 281 | * except when using only battery backup power, two |
| 282 | * comparators produce VBUS_PRES and ID_PRES signals, |
| 283 | * which don't match docs elsewhere. But ... BIT(7) |
| 284 | * and BIT(2) of STS_HW_CONDITIONS, respectively, do |
| 285 | * seem to match up. If either is true the USB_PRES |
| 286 | * signal is active, the OTG module is activated, and |
| 287 | * its interrupt may be raised (may wake the system). |
| 288 | */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 289 | status = twl4030_readb(twl, TWL_MODULE_PM_MASTER, STS_HW_CONDITIONS); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 290 | if (status < 0) |
| 291 | dev_err(twl->dev, "USB link status err %d\n", status); |
David Brownell | def6f8b | 2009-03-31 12:26:10 -0700 | [diff] [blame] | 292 | else if (status & (BIT(7) | BIT(2))) { |
Grazvydas Ignotas | f65f4f4 | 2013-03-24 17:36:53 +0200 | [diff] [blame] | 293 | if (status & BIT(7)) { |
| 294 | if (twl4030_is_driving_vbus(twl)) |
| 295 | status &= ~BIT(7); |
| 296 | else |
| 297 | twl->vbus_supplied = true; |
| 298 | } |
Matthias Kaehlcke | a87103a | 2011-04-01 23:02:07 +0200 | [diff] [blame] | 299 | |
David Brownell | def6f8b | 2009-03-31 12:26:10 -0700 | [diff] [blame] | 300 | if (status & BIT(2)) |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 301 | linkstat = OMAP_MUSB_ID_GROUND; |
Grazvydas Ignotas | f65f4f4 | 2013-03-24 17:36:53 +0200 | [diff] [blame] | 302 | else if (status & BIT(7)) |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 303 | linkstat = OMAP_MUSB_VBUS_VALID; |
Grazvydas Ignotas | f65f4f4 | 2013-03-24 17:36:53 +0200 | [diff] [blame] | 304 | else |
| 305 | linkstat = OMAP_MUSB_VBUS_OFF; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 306 | } else { |
| 307 | if (twl->linkstat != OMAP_MUSB_UNKNOWN) |
| 308 | linkstat = OMAP_MUSB_VBUS_OFF; |
| 309 | } |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 310 | |
| 311 | dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n", |
| 312 | status, status, linkstat); |
| 313 | |
| 314 | /* REVISIT this assumes host and peripheral controllers |
| 315 | * are registered, and that both are active... |
| 316 | */ |
| 317 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 318 | return linkstat; |
| 319 | } |
| 320 | |
| 321 | static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode) |
| 322 | { |
| 323 | twl->usb_mode = mode; |
| 324 | |
| 325 | switch (mode) { |
| 326 | case T2_USB_MODE_ULPI: |
Heikki Krogerus | 92a6e6b | 2010-03-31 10:18:05 +0300 | [diff] [blame] | 327 | twl4030_usb_clear_bits(twl, ULPI_IFC_CTRL, |
| 328 | ULPI_IFC_CTRL_CARKITMODE); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 329 | twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); |
Heikki Krogerus | 92a6e6b | 2010-03-31 10:18:05 +0300 | [diff] [blame] | 330 | twl4030_usb_clear_bits(twl, ULPI_FUNC_CTRL, |
| 331 | ULPI_FUNC_CTRL_XCVRSEL_MASK | |
| 332 | ULPI_FUNC_CTRL_OPMODE_MASK); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 333 | break; |
| 334 | case -1: |
| 335 | /* FIXME: power on defaults */ |
| 336 | break; |
| 337 | default: |
| 338 | dev_err(twl->dev, "unsupported T2 transceiver mode %d\n", |
| 339 | mode); |
| 340 | break; |
Sachin Kamat | ed093e6 | 2014-02-03 13:55:04 +0530 | [diff] [blame] | 341 | } |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | static void twl4030_i2c_access(struct twl4030_usb *twl, int on) |
| 345 | { |
| 346 | unsigned long timeout; |
| 347 | int val = twl4030_usb_read(twl, PHY_CLK_CTRL); |
| 348 | |
| 349 | if (val >= 0) { |
| 350 | if (on) { |
| 351 | /* enable DPLL to access PHY registers over I2C */ |
| 352 | val |= REQ_PHY_DPLL_CLK; |
| 353 | WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL, |
| 354 | (u8)val) < 0); |
| 355 | |
| 356 | timeout = jiffies + HZ; |
| 357 | while (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) & |
| 358 | PHY_DPLL_CLK) |
| 359 | && time_before(jiffies, timeout)) |
| 360 | udelay(10); |
| 361 | if (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) & |
| 362 | PHY_DPLL_CLK)) |
| 363 | dev_err(twl->dev, "Timeout setting T2 HSUSB " |
| 364 | "PHY DPLL clock\n"); |
| 365 | } else { |
| 366 | /* let ULPI control the DPLL clock */ |
| 367 | val &= ~REQ_PHY_DPLL_CLK; |
| 368 | WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL, |
| 369 | (u8)val) < 0); |
| 370 | } |
| 371 | } |
| 372 | } |
| 373 | |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 374 | static void __twl4030_phy_power(struct twl4030_usb *twl, int on) |
| 375 | { |
| 376 | u8 pwr = twl4030_usb_read(twl, PHY_PWR_CTRL); |
| 377 | |
| 378 | if (on) |
| 379 | pwr &= ~PHY_PWR_PHYPWD; |
| 380 | else |
| 381 | pwr |= PHY_PWR_PHYPWD; |
| 382 | |
| 383 | WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0); |
| 384 | } |
| 385 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 386 | static void twl4030_phy_power(struct twl4030_usb *twl, int on) |
| 387 | { |
Fabio Baltieri | 9ec602e | 2013-04-03 16:02:26 +0200 | [diff] [blame] | 388 | int ret; |
| 389 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 390 | if (on) { |
Fabio Baltieri | 9ec602e | 2013-04-03 16:02:26 +0200 | [diff] [blame] | 391 | ret = regulator_enable(twl->usb3v1); |
| 392 | if (ret) |
| 393 | dev_err(twl->dev, "Failed to enable usb3v1\n"); |
| 394 | |
| 395 | ret = regulator_enable(twl->usb1v8); |
| 396 | if (ret) |
| 397 | dev_err(twl->dev, "Failed to enable usb1v8\n"); |
| 398 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 399 | /* |
| 400 | * Disabling usb3v1 regulator (= writing 0 to VUSB3V1_DEV_GRP |
| 401 | * in twl4030) resets the VUSB_DEDICATED2 register. This reset |
| 402 | * enables VUSB3V1_SLEEP bit that remaps usb3v1 ACTIVE state to |
| 403 | * SLEEP. We work around this by clearing the bit after usv3v1 |
| 404 | * is re-activated. This ensures that VUSB3V1 is really active. |
| 405 | */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 406 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2); |
Fabio Baltieri | 9ec602e | 2013-04-03 16:02:26 +0200 | [diff] [blame] | 407 | |
| 408 | ret = regulator_enable(twl->usb1v5); |
| 409 | if (ret) |
| 410 | dev_err(twl->dev, "Failed to enable usb1v5\n"); |
| 411 | |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 412 | __twl4030_phy_power(twl, 1); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 413 | twl4030_usb_write(twl, PHY_CLK_CTRL, |
| 414 | twl4030_usb_read(twl, PHY_CLK_CTRL) | |
| 415 | (PHY_CLK_CTRL_CLOCKGATING_EN | |
| 416 | PHY_CLK_CTRL_CLK32K_EN)); |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 417 | } else { |
| 418 | __twl4030_phy_power(twl, 0); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 419 | regulator_disable(twl->usb1v5); |
| 420 | regulator_disable(twl->usb1v8); |
| 421 | regulator_disable(twl->usb3v1); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 422 | } |
| 423 | } |
| 424 | |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 425 | static int twl4030_phy_power_off(struct phy *phy) |
| 426 | { |
| 427 | struct twl4030_usb *twl = phy_get_drvdata(phy); |
| 428 | |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 429 | if (twl->asleep) |
| 430 | return 0; |
| 431 | |
| 432 | twl4030_phy_power(twl, 0); |
| 433 | twl->asleep = 1; |
| 434 | dev_dbg(twl->dev, "%s\n", __func__); |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 435 | return 0; |
| 436 | } |
| 437 | |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 438 | static void __twl4030_phy_power_on(struct twl4030_usb *twl) |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 439 | { |
| 440 | twl4030_phy_power(twl, 1); |
| 441 | twl4030_i2c_access(twl, 1); |
| 442 | twl4030_usb_set_mode(twl, twl->usb_mode); |
| 443 | if (twl->usb_mode == T2_USB_MODE_ULPI) |
| 444 | twl4030_i2c_access(twl, 0); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 445 | } |
| 446 | |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 447 | static int twl4030_phy_power_on(struct phy *phy) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 448 | { |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 449 | struct twl4030_usb *twl = phy_get_drvdata(phy); |
| 450 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 451 | if (!twl->asleep) |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 452 | return 0; |
| 453 | __twl4030_phy_power_on(twl); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 454 | twl->asleep = 0; |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 455 | dev_dbg(twl->dev, "%s\n", __func__); |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 456 | |
| 457 | /* |
| 458 | * XXX When VBUS gets driven after musb goes to A mode, |
| 459 | * ID_PRES related interrupts no longer arrive, why? |
| 460 | * Register itself is updated fine though, so we must poll. |
| 461 | */ |
| 462 | if (twl->linkstat == OMAP_MUSB_ID_GROUND) { |
| 463 | cancel_delayed_work(&twl->id_workaround_work); |
| 464 | schedule_delayed_work(&twl->id_workaround_work, HZ); |
| 465 | } |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 466 | return 0; |
| 467 | } |
| 468 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 469 | static int twl4030_usb_ldo_init(struct twl4030_usb *twl) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 470 | { |
| 471 | /* Enable writing to power configuration registers */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 472 | twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1, |
| 473 | TWL4030_PM_MASTER_PROTECT_KEY); |
Felipe Balbi | e7944d8 | 2010-08-18 09:19:37 +0300 | [diff] [blame] | 474 | |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 475 | twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2, |
| 476 | TWL4030_PM_MASTER_PROTECT_KEY); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 477 | |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 478 | /* Keep VUSB3V1 LDO in sleep state until VBUS/ID change detected*/ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 479 | /*twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);*/ |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 480 | |
| 481 | /* input to VUSB3V1 LDO is from VBAT, not VBUS */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 482 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 483 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 484 | /* Initialize 3.1V regulator */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 485 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 486 | |
Kishon Vijay Abraham I | 9166902 | 2013-03-15 18:58:51 +0530 | [diff] [blame] | 487 | twl->usb3v1 = devm_regulator_get(twl->dev, "usb3v1"); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 488 | if (IS_ERR(twl->usb3v1)) |
| 489 | return -ENODEV; |
| 490 | |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 491 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 492 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 493 | /* Initialize 1.5V regulator */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 494 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 495 | |
Kishon Vijay Abraham I | 9166902 | 2013-03-15 18:58:51 +0530 | [diff] [blame] | 496 | twl->usb1v5 = devm_regulator_get(twl->dev, "usb1v5"); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 497 | if (IS_ERR(twl->usb1v5)) |
Kishon Vijay Abraham I | 9166902 | 2013-03-15 18:58:51 +0530 | [diff] [blame] | 498 | return -ENODEV; |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 499 | |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 500 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 501 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 502 | /* Initialize 1.8V regulator */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 503 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 504 | |
Kishon Vijay Abraham I | 9166902 | 2013-03-15 18:58:51 +0530 | [diff] [blame] | 505 | twl->usb1v8 = devm_regulator_get(twl->dev, "usb1v8"); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 506 | if (IS_ERR(twl->usb1v8)) |
Kishon Vijay Abraham I | 9166902 | 2013-03-15 18:58:51 +0530 | [diff] [blame] | 507 | return -ENODEV; |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 508 | |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 509 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 510 | |
| 511 | /* disable access to power configuration registers */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 512 | twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0, |
| 513 | TWL4030_PM_MASTER_PROTECT_KEY); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 514 | |
| 515 | return 0; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 516 | } |
| 517 | |
| 518 | static ssize_t twl4030_usb_vbus_show(struct device *dev, |
| 519 | struct device_attribute *attr, char *buf) |
| 520 | { |
| 521 | struct twl4030_usb *twl = dev_get_drvdata(dev); |
| 522 | unsigned long flags; |
| 523 | int ret = -EINVAL; |
| 524 | |
| 525 | spin_lock_irqsave(&twl->lock, flags); |
| 526 | ret = sprintf(buf, "%s\n", |
Matthias Kaehlcke | a87103a | 2011-04-01 23:02:07 +0200 | [diff] [blame] | 527 | twl->vbus_supplied ? "on" : "off"); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 528 | spin_unlock_irqrestore(&twl->lock, flags); |
| 529 | |
| 530 | return ret; |
| 531 | } |
| 532 | static DEVICE_ATTR(vbus, 0444, twl4030_usb_vbus_show, NULL); |
| 533 | |
| 534 | static irqreturn_t twl4030_usb_irq(int irq, void *_twl) |
| 535 | { |
| 536 | struct twl4030_usb *twl = _twl; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 537 | enum omap_musb_vbus_id_status status; |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 538 | bool status_changed = false; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 539 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 540 | status = twl4030_usb_linkstat(twl); |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 541 | |
| 542 | spin_lock_irq(&twl->lock); |
| 543 | if (status >= 0 && status != twl->linkstat) { |
| 544 | twl->linkstat = status; |
| 545 | status_changed = true; |
| 546 | } |
| 547 | spin_unlock_irq(&twl->lock); |
| 548 | |
| 549 | if (status_changed) { |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 550 | /* FIXME add a set_power() method so that B-devices can |
| 551 | * configure the charger appropriately. It's not always |
| 552 | * correct to consume VBUS power, and how much current to |
| 553 | * consume is a function of the USB configuration chosen |
| 554 | * by the host. |
| 555 | * |
| 556 | * REVISIT usb_gadget_vbus_connect(...) as needed, ditto |
| 557 | * its disconnect() sibling, when changing to/from the |
| 558 | * USB_LINK_VBUS state. musb_hdrc won't care until it |
| 559 | * starts to handle softconnect right. |
| 560 | */ |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 561 | omap_musb_mailbox(status); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 562 | } |
| 563 | sysfs_notify(&twl->dev->kobj, NULL, "vbus"); |
| 564 | |
| 565 | return IRQ_HANDLED; |
| 566 | } |
| 567 | |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 568 | static void twl4030_id_workaround_work(struct work_struct *work) |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 569 | { |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 570 | struct twl4030_usb *twl = container_of(work, struct twl4030_usb, |
| 571 | id_workaround_work.work); |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 572 | enum omap_musb_vbus_id_status status; |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 573 | bool status_changed = false; |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 574 | |
| 575 | status = twl4030_usb_linkstat(twl); |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 576 | |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 577 | spin_lock_irq(&twl->lock); |
| 578 | if (status >= 0 && status != twl->linkstat) { |
| 579 | twl->linkstat = status; |
| 580 | status_changed = true; |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 581 | } |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 582 | spin_unlock_irq(&twl->lock); |
| 583 | |
| 584 | if (status_changed) { |
| 585 | dev_dbg(twl->dev, "handle missing status change to %d\n", |
| 586 | status); |
| 587 | omap_musb_mailbox(status); |
| 588 | } |
| 589 | |
| 590 | /* don't schedule during sleep - irq works right then */ |
| 591 | if (status == OMAP_MUSB_ID_GROUND && !twl->asleep) { |
| 592 | cancel_delayed_work(&twl->id_workaround_work); |
| 593 | schedule_delayed_work(&twl->id_workaround_work, HZ); |
| 594 | } |
| 595 | } |
| 596 | |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 597 | static int twl4030_phy_init(struct phy *phy) |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 598 | { |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 599 | struct twl4030_usb *twl = phy_get_drvdata(phy); |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 600 | enum omap_musb_vbus_id_status status; |
| 601 | |
Grazvydas Ignotas | 44a50d0 | 2013-03-17 20:23:21 +0200 | [diff] [blame] | 602 | /* |
| 603 | * Start in sleep state, we'll get called through set_suspend() |
| 604 | * callback when musb is runtime resumed and it's time to start. |
| 605 | */ |
| 606 | __twl4030_phy_power(twl, 0); |
| 607 | twl->asleep = 1; |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 608 | |
Grazvydas Ignotas | 44a50d0 | 2013-03-17 20:23:21 +0200 | [diff] [blame] | 609 | status = twl4030_usb_linkstat(twl); |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 610 | twl->linkstat = status; |
| 611 | |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 612 | if (status == OMAP_MUSB_ID_GROUND || status == OMAP_MUSB_VBUS_VALID) { |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 613 | omap_musb_mailbox(twl->linkstat); |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 614 | twl4030_phy_power_on(phy); |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 615 | } |
Grazvydas Ignotas | 44a50d0 | 2013-03-17 20:23:21 +0200 | [diff] [blame] | 616 | |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 617 | sysfs_notify(&twl->dev->kobj, NULL, "vbus"); |
Kishon Vijay Abraham I | 817e5f3 | 2013-03-15 18:58:52 +0530 | [diff] [blame] | 618 | return 0; |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 619 | } |
| 620 | |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 621 | static int twl4030_set_peripheral(struct usb_otg *otg, |
| 622 | struct usb_gadget *gadget) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 623 | { |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 624 | if (!otg) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 625 | return -ENODEV; |
| 626 | |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 627 | otg->gadget = gadget; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 628 | if (!gadget) |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 629 | otg->phy->state = OTG_STATE_UNDEFINED; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 630 | |
| 631 | return 0; |
| 632 | } |
| 633 | |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 634 | static int twl4030_set_host(struct usb_otg *otg, struct usb_bus *host) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 635 | { |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 636 | if (!otg) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 637 | return -ENODEV; |
| 638 | |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 639 | otg->host = host; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 640 | if (!host) |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 641 | otg->phy->state = OTG_STATE_UNDEFINED; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 642 | |
| 643 | return 0; |
| 644 | } |
| 645 | |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 646 | static const struct phy_ops ops = { |
| 647 | .init = twl4030_phy_init, |
| 648 | .power_on = twl4030_phy_power_on, |
| 649 | .power_off = twl4030_phy_power_off, |
| 650 | .owner = THIS_MODULE, |
| 651 | }; |
| 652 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 653 | static int twl4030_usb_probe(struct platform_device *pdev) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 654 | { |
Jingoo Han | 19f9e18 | 2013-07-30 17:02:13 +0900 | [diff] [blame] | 655 | struct twl4030_usb_data *pdata = dev_get_platdata(&pdev->dev); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 656 | struct twl4030_usb *twl; |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 657 | struct phy *phy; |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 658 | int status, err; |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 659 | struct usb_otg *otg; |
Kishon Vijay Abraham I | f8515f0 | 2012-09-06 20:27:09 +0530 | [diff] [blame] | 660 | struct device_node *np = pdev->dev.of_node; |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 661 | struct phy_provider *phy_provider; |
| 662 | struct phy_init_data *init_data = NULL; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 663 | |
Sachin Kamat | b6d790f | 2014-02-03 13:55:03 +0530 | [diff] [blame] | 664 | twl = devm_kzalloc(&pdev->dev, sizeof(*twl), GFP_KERNEL); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 665 | if (!twl) |
| 666 | return -ENOMEM; |
| 667 | |
Kishon Vijay Abraham I | f8515f0 | 2012-09-06 20:27:09 +0530 | [diff] [blame] | 668 | if (np) |
| 669 | of_property_read_u32(np, "usb_mode", |
| 670 | (enum twl4030_usb_mode *)&twl->usb_mode); |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 671 | else if (pdata) { |
Kishon Vijay Abraham I | f8515f0 | 2012-09-06 20:27:09 +0530 | [diff] [blame] | 672 | twl->usb_mode = pdata->usb_mode; |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 673 | init_data = pdata->init_data; |
| 674 | } else { |
Kishon Vijay Abraham I | f8515f0 | 2012-09-06 20:27:09 +0530 | [diff] [blame] | 675 | dev_err(&pdev->dev, "twl4030 initialized without pdata\n"); |
| 676 | return -EINVAL; |
| 677 | } |
| 678 | |
Sachin Kamat | b6d790f | 2014-02-03 13:55:03 +0530 | [diff] [blame] | 679 | otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); |
Kishon Vijay Abraham I | b8a3efa | 2012-06-22 17:40:55 +0530 | [diff] [blame] | 680 | if (!otg) |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 681 | return -ENOMEM; |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 682 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 683 | twl->dev = &pdev->dev; |
| 684 | twl->irq = platform_get_irq(pdev, 0); |
Matthias Kaehlcke | a87103a | 2011-04-01 23:02:07 +0200 | [diff] [blame] | 685 | twl->vbus_supplied = false; |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 686 | twl->asleep = 1; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 687 | twl->linkstat = OMAP_MUSB_UNKNOWN; |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 688 | |
| 689 | twl->phy.dev = twl->dev; |
| 690 | twl->phy.label = "twl4030"; |
| 691 | twl->phy.otg = otg; |
Kishon Vijay Abraham I | c11747f | 2013-01-25 08:03:24 +0530 | [diff] [blame] | 692 | twl->phy.type = USB_PHY_TYPE_USB2; |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 693 | |
| 694 | otg->phy = &twl->phy; |
| 695 | otg->set_host = twl4030_set_host; |
| 696 | otg->set_peripheral = twl4030_set_peripheral; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 697 | |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 698 | phy = devm_phy_create(twl->dev, &ops, init_data); |
| 699 | if (IS_ERR(phy)) { |
| 700 | dev_dbg(&pdev->dev, "Failed to create PHY\n"); |
| 701 | return PTR_ERR(phy); |
| 702 | } |
| 703 | |
| 704 | phy_set_drvdata(phy, twl); |
| 705 | |
Kishon Vijay Abraham I | 64fe189 | 2014-02-17 14:29:25 +0530 | [diff] [blame] | 706 | phy_provider = devm_of_phy_provider_register(twl->dev, |
| 707 | of_phy_simple_xlate); |
| 708 | if (IS_ERR(phy_provider)) |
| 709 | return PTR_ERR(phy_provider); |
| 710 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 711 | /* init spinlock for workqueue */ |
| 712 | spin_lock_init(&twl->lock); |
| 713 | |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 714 | INIT_DELAYED_WORK(&twl->id_workaround_work, twl4030_id_workaround_work); |
| 715 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 716 | err = twl4030_usb_ldo_init(twl); |
| 717 | if (err) { |
| 718 | dev_err(&pdev->dev, "ldo init failed\n"); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 719 | return err; |
| 720 | } |
Kishon Vijay Abraham I | c11747f | 2013-01-25 08:03:24 +0530 | [diff] [blame] | 721 | usb_add_phy_dev(&twl->phy); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 722 | |
| 723 | platform_set_drvdata(pdev, twl); |
| 724 | if (device_create_file(&pdev->dev, &dev_attr_vbus)) |
| 725 | dev_warn(&pdev->dev, "could not create sysfs file\n"); |
| 726 | |
Pali Rohár | 80d2e76 | 2013-09-18 19:03:33 +0200 | [diff] [blame] | 727 | ATOMIC_INIT_NOTIFIER_HEAD(&twl->phy.notifier); |
| 728 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 729 | /* Our job is to use irqs and status from the power module |
| 730 | * to keep the transceiver disabled when nothing's connected. |
| 731 | * |
| 732 | * FIXME we actually shouldn't start enabling it until the |
| 733 | * USB controller drivers have said they're ready, by calling |
| 734 | * set_host() and/or set_peripheral() ... OTG_capable boards |
| 735 | * need both handles, otherwise just one suffices. |
| 736 | */ |
| 737 | twl->irq_enabled = true; |
Kishon Vijay Abraham I | 9166902 | 2013-03-15 18:58:51 +0530 | [diff] [blame] | 738 | status = devm_request_threaded_irq(twl->dev, twl->irq, NULL, |
| 739 | twl4030_usb_irq, IRQF_TRIGGER_FALLING | |
| 740 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, "twl4030_usb", twl); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 741 | if (status < 0) { |
| 742 | dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n", |
| 743 | twl->irq, status); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 744 | return status; |
| 745 | } |
| 746 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 747 | dev_info(&pdev->dev, "Initialized TWL4030 USB module\n"); |
| 748 | return 0; |
| 749 | } |
| 750 | |
Dmitry Torokhov | 39d3568 | 2013-02-24 00:55:07 -0800 | [diff] [blame] | 751 | static int twl4030_usb_remove(struct platform_device *pdev) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 752 | { |
| 753 | struct twl4030_usb *twl = platform_get_drvdata(pdev); |
| 754 | int val; |
| 755 | |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 756 | cancel_delayed_work(&twl->id_workaround_work); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 757 | 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 | |
| 762 | /* autogate 60MHz ULPI clock, |
| 763 | * clear dpll clock request for i2c access, |
| 764 | * disable 32KHz |
| 765 | */ |
| 766 | val = twl4030_usb_read(twl, PHY_CLK_CTRL); |
| 767 | if (val >= 0) { |
| 768 | val |= PHY_CLK_CTRL_CLOCKGATING_EN; |
| 769 | val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK); |
| 770 | twl4030_usb_write(twl, PHY_CLK_CTRL, (u8)val); |
| 771 | } |
| 772 | |
| 773 | /* disable complete OTG block */ |
| 774 | twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); |
| 775 | |
Jarkko Nikula | c3d6450 | 2010-11-30 17:58:25 +0200 | [diff] [blame] | 776 | if (!twl->asleep) |
| 777 | twl4030_phy_power(twl, 0); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 778 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 779 | return 0; |
| 780 | } |
| 781 | |
Kishon Vijay Abraham I | f8515f0 | 2012-09-06 20:27:09 +0530 | [diff] [blame] | 782 | #ifdef CONFIG_OF |
| 783 | static const struct of_device_id twl4030_usb_id_table[] = { |
| 784 | { .compatible = "ti,twl4030-usb" }, |
| 785 | {} |
| 786 | }; |
| 787 | MODULE_DEVICE_TABLE(of, twl4030_usb_id_table); |
| 788 | #endif |
| 789 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 790 | static struct platform_driver twl4030_usb_driver = { |
| 791 | .probe = twl4030_usb_probe, |
Dmitry Torokhov | 39d3568 | 2013-02-24 00:55:07 -0800 | [diff] [blame] | 792 | .remove = twl4030_usb_remove, |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 793 | .driver = { |
| 794 | .name = "twl4030_usb", |
| 795 | .owner = THIS_MODULE, |
Kishon Vijay Abraham I | f8515f0 | 2012-09-06 20:27:09 +0530 | [diff] [blame] | 796 | .of_match_table = of_match_ptr(twl4030_usb_id_table), |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 797 | }, |
| 798 | }; |
| 799 | |
| 800 | static int __init twl4030_usb_init(void) |
| 801 | { |
| 802 | return platform_driver_register(&twl4030_usb_driver); |
| 803 | } |
| 804 | subsys_initcall(twl4030_usb_init); |
| 805 | |
| 806 | static void __exit twl4030_usb_exit(void) |
| 807 | { |
| 808 | platform_driver_unregister(&twl4030_usb_driver); |
| 809 | } |
| 810 | module_exit(twl4030_usb_exit); |
| 811 | |
| 812 | MODULE_ALIAS("platform:twl4030_usb"); |
| 813 | MODULE_AUTHOR("Texas Instruments, Inc, Nokia Corporation"); |
| 814 | MODULE_DESCRIPTION("TWL4030 USB transceiver driver"); |
| 815 | MODULE_LICENSE("GPL"); |