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> |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 31 | #include <linux/workqueue.h> |
| 32 | #include <linux/io.h> |
| 33 | #include <linux/delay.h> |
| 34 | #include <linux/usb/otg.h> |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 35 | #include <linux/phy/phy.h> |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 36 | #include <linux/pm_runtime.h> |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 37 | #include <linux/usb/musb.h> |
Heikki Krogerus | 92a6e6b | 2010-03-31 10:18:05 +0300 | [diff] [blame] | 38 | #include <linux/usb/ulpi.h> |
Wolfram Sang | a205425 | 2017-08-14 18:34:24 +0200 | [diff] [blame] | 39 | #include <linux/mfd/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 | |
NeilBrown | 56301df | 2015-04-16 18:03:04 +1000 | [diff] [blame] | 147 | /* |
| 148 | * If VBUS is valid or ID is ground, then we know a |
| 149 | * cable is present and we need to be runtime-enabled |
| 150 | */ |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 151 | static inline bool cable_present(enum musb_vbus_id_status stat) |
NeilBrown | 56301df | 2015-04-16 18:03:04 +1000 | [diff] [blame] | 152 | { |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 153 | return stat == MUSB_VBUS_VALID || |
| 154 | stat == MUSB_ID_GROUND; |
NeilBrown | 56301df | 2015-04-16 18:03:04 +1000 | [diff] [blame] | 155 | } |
| 156 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 157 | struct twl4030_usb { |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 158 | struct usb_phy phy; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 159 | struct device *dev; |
| 160 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 161 | /* TWL4030 internal USB regulator supplies */ |
| 162 | struct regulator *usb1v5; |
| 163 | struct regulator *usb1v8; |
| 164 | struct regulator *usb3v1; |
| 165 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 166 | /* for vbus reporting with irqs disabled */ |
Tony Lindgren | dcc35b2 | 2014-08-27 16:28:11 -0700 | [diff] [blame] | 167 | struct mutex lock; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 168 | |
| 169 | /* pin configuration */ |
| 170 | enum twl4030_usb_mode usb_mode; |
| 171 | |
| 172 | int irq; |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 173 | enum musb_vbus_id_status linkstat; |
Matthias Kaehlcke | a87103a | 2011-04-01 23:02:07 +0200 | [diff] [blame] | 174 | bool vbus_supplied; |
Andreas Kemnade | 78489c7 | 2016-08-22 21:24:22 +0200 | [diff] [blame] | 175 | bool musb_mailbox_pending; |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 176 | |
| 177 | struct delayed_work id_workaround_work; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 178 | }; |
| 179 | |
| 180 | /* internal define on top of container_of */ |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 181 | #define phy_to_twl(x) container_of((x), struct twl4030_usb, phy) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 182 | |
| 183 | /*-------------------------------------------------------------------------*/ |
| 184 | |
| 185 | static int twl4030_i2c_write_u8_verify(struct twl4030_usb *twl, |
| 186 | u8 module, u8 data, u8 address) |
| 187 | { |
Dan Carpenter | df674ef | 2017-06-30 11:01:47 +0300 | [diff] [blame] | 188 | u8 check = 0xFF; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 189 | |
Balaji T K | fc7b92f | 2009-12-13 21:23:33 +0100 | [diff] [blame] | 190 | if ((twl_i2c_write_u8(module, data, address) >= 0) && |
| 191 | (twl_i2c_read_u8(module, &check, address) >= 0) && |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 192 | (check == data)) |
| 193 | return 0; |
| 194 | dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n", |
| 195 | 1, module, address, check, data); |
| 196 | |
| 197 | /* Failed once: Try again */ |
Balaji T K | fc7b92f | 2009-12-13 21:23:33 +0100 | [diff] [blame] | 198 | if ((twl_i2c_write_u8(module, data, address) >= 0) && |
| 199 | (twl_i2c_read_u8(module, &check, address) >= 0) && |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 200 | (check == data)) |
| 201 | return 0; |
| 202 | dev_dbg(twl->dev, "Write%d[%d,0x%x] wrote %02x but read %02x\n", |
| 203 | 2, module, address, check, data); |
| 204 | |
| 205 | /* Failed again: Return error */ |
| 206 | return -EBUSY; |
| 207 | } |
| 208 | |
| 209 | #define twl4030_usb_write_verify(twl, address, data) \ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 210 | twl4030_i2c_write_u8_verify(twl, TWL_MODULE_USB, (data), (address)) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 211 | |
| 212 | static inline int twl4030_usb_write(struct twl4030_usb *twl, |
| 213 | u8 address, u8 data) |
| 214 | { |
| 215 | int ret = 0; |
| 216 | |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 217 | ret = twl_i2c_write_u8(TWL_MODULE_USB, data, address); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 218 | if (ret < 0) |
| 219 | dev_dbg(twl->dev, |
| 220 | "TWL4030:USB:Write[0x%x] Error %d\n", address, ret); |
| 221 | return ret; |
| 222 | } |
| 223 | |
| 224 | static inline int twl4030_readb(struct twl4030_usb *twl, u8 module, u8 address) |
| 225 | { |
| 226 | u8 data; |
| 227 | int ret = 0; |
| 228 | |
Balaji T K | fc7b92f | 2009-12-13 21:23:33 +0100 | [diff] [blame] | 229 | ret = twl_i2c_read_u8(module, &data, address); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 230 | if (ret >= 0) |
| 231 | ret = data; |
| 232 | else |
| 233 | dev_dbg(twl->dev, |
| 234 | "TWL4030:readb[0x%x,0x%x] Error %d\n", |
| 235 | module, address, ret); |
| 236 | |
| 237 | return ret; |
| 238 | } |
| 239 | |
| 240 | static inline int twl4030_usb_read(struct twl4030_usb *twl, u8 address) |
| 241 | { |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 242 | return twl4030_readb(twl, TWL_MODULE_USB, address); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | /*-------------------------------------------------------------------------*/ |
| 246 | |
| 247 | static inline int |
| 248 | twl4030_usb_set_bits(struct twl4030_usb *twl, u8 reg, u8 bits) |
| 249 | { |
Heikki Krogerus | 92a6e6b | 2010-03-31 10:18:05 +0300 | [diff] [blame] | 250 | return twl4030_usb_write(twl, ULPI_SET(reg), bits); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | static inline int |
| 254 | twl4030_usb_clear_bits(struct twl4030_usb *twl, u8 reg, u8 bits) |
| 255 | { |
Heikki Krogerus | 92a6e6b | 2010-03-31 10:18:05 +0300 | [diff] [blame] | 256 | return twl4030_usb_write(twl, ULPI_CLR(reg), bits); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | /*-------------------------------------------------------------------------*/ |
| 260 | |
Grazvydas Ignotas | f65f4f4 | 2013-03-24 17:36:53 +0200 | [diff] [blame] | 261 | static bool twl4030_is_driving_vbus(struct twl4030_usb *twl) |
| 262 | { |
| 263 | int ret; |
| 264 | |
| 265 | ret = twl4030_usb_read(twl, PHY_CLK_CTRL_STS); |
| 266 | if (ret < 0 || !(ret & PHY_DPLL_CLK)) |
| 267 | /* |
| 268 | * if clocks are off, registers are not updated, |
| 269 | * but we can assume we don't drive VBUS in this case |
| 270 | */ |
| 271 | return false; |
| 272 | |
| 273 | ret = twl4030_usb_read(twl, ULPI_OTG_CTRL); |
| 274 | if (ret < 0) |
| 275 | return false; |
| 276 | |
| 277 | return (ret & (ULPI_OTG_DRVVBUS | ULPI_OTG_CHRGVBUS)) ? true : false; |
| 278 | } |
| 279 | |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 280 | static enum musb_vbus_id_status |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 281 | twl4030_usb_linkstat(struct twl4030_usb *twl) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 282 | { |
| 283 | int status; |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 284 | enum musb_vbus_id_status linkstat = MUSB_UNKNOWN; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 285 | |
Matthias Kaehlcke | a87103a | 2011-04-01 23:02:07 +0200 | [diff] [blame] | 286 | twl->vbus_supplied = false; |
| 287 | |
David Brownell | def6f8b | 2009-03-31 12:26:10 -0700 | [diff] [blame] | 288 | /* |
| 289 | * For ID/VBUS sensing, see manual section 15.4.8 ... |
| 290 | * except when using only battery backup power, two |
| 291 | * comparators produce VBUS_PRES and ID_PRES signals, |
| 292 | * which don't match docs elsewhere. But ... BIT(7) |
| 293 | * and BIT(2) of STS_HW_CONDITIONS, respectively, do |
| 294 | * seem to match up. If either is true the USB_PRES |
| 295 | * signal is active, the OTG module is activated, and |
| 296 | * its interrupt may be raised (may wake the system). |
| 297 | */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 298 | status = twl4030_readb(twl, TWL_MODULE_PM_MASTER, STS_HW_CONDITIONS); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 299 | if (status < 0) |
| 300 | dev_err(twl->dev, "USB link status err %d\n", status); |
David Brownell | def6f8b | 2009-03-31 12:26:10 -0700 | [diff] [blame] | 301 | else if (status & (BIT(7) | BIT(2))) { |
Grazvydas Ignotas | f65f4f4 | 2013-03-24 17:36:53 +0200 | [diff] [blame] | 302 | if (status & BIT(7)) { |
| 303 | if (twl4030_is_driving_vbus(twl)) |
| 304 | status &= ~BIT(7); |
| 305 | else |
| 306 | twl->vbus_supplied = true; |
| 307 | } |
Matthias Kaehlcke | a87103a | 2011-04-01 23:02:07 +0200 | [diff] [blame] | 308 | |
David Brownell | def6f8b | 2009-03-31 12:26:10 -0700 | [diff] [blame] | 309 | if (status & BIT(2)) |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 310 | linkstat = MUSB_ID_GROUND; |
Grazvydas Ignotas | f65f4f4 | 2013-03-24 17:36:53 +0200 | [diff] [blame] | 311 | else if (status & BIT(7)) |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 312 | linkstat = MUSB_VBUS_VALID; |
Grazvydas Ignotas | f65f4f4 | 2013-03-24 17:36:53 +0200 | [diff] [blame] | 313 | else |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 314 | linkstat = MUSB_VBUS_OFF; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 315 | } else { |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 316 | if (twl->linkstat != MUSB_UNKNOWN) |
| 317 | linkstat = MUSB_VBUS_OFF; |
Kishon Vijay Abraham I | c972143 | 2012-06-22 17:40:52 +0530 | [diff] [blame] | 318 | } |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 319 | |
Matt Ranostay | 9d052aa | 2016-09-20 19:58:04 -0700 | [diff] [blame] | 320 | kobject_uevent(&twl->dev->kobj, linkstat == MUSB_VBUS_VALID |
| 321 | ? KOBJ_ONLINE : KOBJ_OFFLINE); |
| 322 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 323 | dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n", |
| 324 | status, status, linkstat); |
| 325 | |
| 326 | /* REVISIT this assumes host and peripheral controllers |
| 327 | * are registered, and that both are active... |
| 328 | */ |
| 329 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 330 | return linkstat; |
| 331 | } |
| 332 | |
| 333 | static void twl4030_usb_set_mode(struct twl4030_usb *twl, int mode) |
| 334 | { |
| 335 | twl->usb_mode = mode; |
| 336 | |
| 337 | switch (mode) { |
| 338 | case T2_USB_MODE_ULPI: |
Heikki Krogerus | 92a6e6b | 2010-03-31 10:18:05 +0300 | [diff] [blame] | 339 | twl4030_usb_clear_bits(twl, ULPI_IFC_CTRL, |
| 340 | ULPI_IFC_CTRL_CARKITMODE); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 341 | twl4030_usb_set_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); |
Heikki Krogerus | 92a6e6b | 2010-03-31 10:18:05 +0300 | [diff] [blame] | 342 | twl4030_usb_clear_bits(twl, ULPI_FUNC_CTRL, |
| 343 | ULPI_FUNC_CTRL_XCVRSEL_MASK | |
| 344 | ULPI_FUNC_CTRL_OPMODE_MASK); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 345 | break; |
| 346 | case -1: |
| 347 | /* FIXME: power on defaults */ |
| 348 | break; |
| 349 | default: |
| 350 | dev_err(twl->dev, "unsupported T2 transceiver mode %d\n", |
| 351 | mode); |
| 352 | break; |
Sachin Kamat | ed093e6 | 2014-02-03 13:55:04 +0530 | [diff] [blame] | 353 | } |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | static void twl4030_i2c_access(struct twl4030_usb *twl, int on) |
| 357 | { |
| 358 | unsigned long timeout; |
| 359 | int val = twl4030_usb_read(twl, PHY_CLK_CTRL); |
| 360 | |
| 361 | if (val >= 0) { |
| 362 | if (on) { |
| 363 | /* enable DPLL to access PHY registers over I2C */ |
| 364 | val |= REQ_PHY_DPLL_CLK; |
| 365 | WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL, |
| 366 | (u8)val) < 0); |
| 367 | |
| 368 | timeout = jiffies + HZ; |
| 369 | while (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) & |
| 370 | PHY_DPLL_CLK) |
| 371 | && time_before(jiffies, timeout)) |
| 372 | udelay(10); |
| 373 | if (!(twl4030_usb_read(twl, PHY_CLK_CTRL_STS) & |
| 374 | PHY_DPLL_CLK)) |
| 375 | dev_err(twl->dev, "Timeout setting T2 HSUSB " |
| 376 | "PHY DPLL clock\n"); |
| 377 | } else { |
| 378 | /* let ULPI control the DPLL clock */ |
| 379 | val &= ~REQ_PHY_DPLL_CLK; |
| 380 | WARN_ON(twl4030_usb_write_verify(twl, PHY_CLK_CTRL, |
| 381 | (u8)val) < 0); |
| 382 | } |
| 383 | } |
| 384 | } |
| 385 | |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 386 | static void __twl4030_phy_power(struct twl4030_usb *twl, int on) |
| 387 | { |
| 388 | u8 pwr = twl4030_usb_read(twl, PHY_PWR_CTRL); |
| 389 | |
| 390 | if (on) |
| 391 | pwr &= ~PHY_PWR_PHYPWD; |
| 392 | else |
| 393 | pwr |= PHY_PWR_PHYPWD; |
| 394 | |
| 395 | WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0); |
| 396 | } |
| 397 | |
Arnd Bergmann | 8073fb8 | 2016-03-02 16:24:08 +0100 | [diff] [blame] | 398 | static int __maybe_unused twl4030_usb_runtime_suspend(struct device *dev) |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 399 | { |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 400 | struct twl4030_usb *twl = dev_get_drvdata(dev); |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 401 | |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 402 | dev_dbg(twl->dev, "%s\n", __func__); |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 403 | |
Tony Lindgren | bad8e33 | 2014-08-27 16:28:09 -0700 | [diff] [blame] | 404 | __twl4030_phy_power(twl, 0); |
| 405 | regulator_disable(twl->usb1v5); |
| 406 | regulator_disable(twl->usb1v8); |
| 407 | regulator_disable(twl->usb3v1); |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 408 | |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 409 | return 0; |
| 410 | } |
| 411 | |
Arnd Bergmann | 8073fb8 | 2016-03-02 16:24:08 +0100 | [diff] [blame] | 412 | static int __maybe_unused twl4030_usb_runtime_resume(struct device *dev) |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 413 | { |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 414 | struct twl4030_usb *twl = dev_get_drvdata(dev); |
Tony Lindgren | bad8e33 | 2014-08-27 16:28:09 -0700 | [diff] [blame] | 415 | int res; |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 416 | |
| 417 | dev_dbg(twl->dev, "%s\n", __func__); |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 418 | |
Tony Lindgren | bad8e33 | 2014-08-27 16:28:09 -0700 | [diff] [blame] | 419 | res = regulator_enable(twl->usb3v1); |
| 420 | if (res) |
| 421 | dev_err(twl->dev, "Failed to enable usb3v1\n"); |
| 422 | |
| 423 | res = regulator_enable(twl->usb1v8); |
| 424 | if (res) |
| 425 | dev_err(twl->dev, "Failed to enable usb1v8\n"); |
| 426 | |
| 427 | /* |
| 428 | * Disabling usb3v1 regulator (= writing 0 to VUSB3V1_DEV_GRP |
| 429 | * in twl4030) resets the VUSB_DEDICATED2 register. This reset |
| 430 | * enables VUSB3V1_SLEEP bit that remaps usb3v1 ACTIVE state to |
| 431 | * SLEEP. We work around this by clearing the bit after usv3v1 |
| 432 | * is re-activated. This ensures that VUSB3V1 is really active. |
| 433 | */ |
| 434 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2); |
| 435 | |
| 436 | res = regulator_enable(twl->usb1v5); |
| 437 | if (res) |
| 438 | dev_err(twl->dev, "Failed to enable usb1v5\n"); |
| 439 | |
| 440 | __twl4030_phy_power(twl, 1); |
| 441 | twl4030_usb_write(twl, PHY_CLK_CTRL, |
| 442 | twl4030_usb_read(twl, PHY_CLK_CTRL) | |
| 443 | (PHY_CLK_CTRL_CLOCKGATING_EN | |
| 444 | PHY_CLK_CTRL_CLK32K_EN)); |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 445 | |
Andreas Kemnade | b78ea84 | 2016-08-25 00:27:59 +0200 | [diff] [blame] | 446 | twl4030_i2c_access(twl, 1); |
| 447 | twl4030_usb_set_mode(twl, twl->usb_mode); |
| 448 | if (twl->usb_mode == T2_USB_MODE_ULPI) |
| 449 | twl4030_i2c_access(twl, 0); |
| 450 | /* |
| 451 | * According to the TPS65950 TRM, there has to be at least 50ms |
| 452 | * delay between setting POWER_CTRL_OTG_ENAB and enabling charging |
| 453 | * so wait here so that a fully enabled phy can be expected after |
| 454 | * resume |
| 455 | */ |
| 456 | msleep(50); |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 457 | return 0; |
| 458 | } |
| 459 | |
| 460 | static int twl4030_phy_power_off(struct phy *phy) |
| 461 | { |
| 462 | struct twl4030_usb *twl = phy_get_drvdata(phy); |
| 463 | |
| 464 | dev_dbg(twl->dev, "%s\n", __func__); |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 465 | |
| 466 | return 0; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 467 | } |
| 468 | |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 469 | static int twl4030_phy_power_on(struct phy *phy) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 470 | { |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 471 | struct twl4030_usb *twl = phy_get_drvdata(phy); |
| 472 | |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 473 | dev_dbg(twl->dev, "%s\n", __func__); |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 474 | pm_runtime_get_sync(twl->dev); |
Tony Lindgren | 12b7db2 | 2016-05-31 10:05:19 -0500 | [diff] [blame] | 475 | schedule_delayed_work(&twl->id_workaround_work, HZ); |
Tony Lindgren | f7c4a46 | 2016-11-16 13:21:27 -0600 | [diff] [blame] | 476 | pm_runtime_mark_last_busy(twl->dev); |
| 477 | pm_runtime_put_autosuspend(twl->dev); |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 478 | |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 479 | return 0; |
| 480 | } |
| 481 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 482 | static int twl4030_usb_ldo_init(struct twl4030_usb *twl) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 483 | { |
| 484 | /* Enable writing to power configuration registers */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 485 | twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1, |
| 486 | TWL4030_PM_MASTER_PROTECT_KEY); |
Felipe Balbi | e7944d8 | 2010-08-18 09:19:37 +0300 | [diff] [blame] | 487 | |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 488 | twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2, |
| 489 | TWL4030_PM_MASTER_PROTECT_KEY); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 490 | |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 491 | /* Keep VUSB3V1 LDO in sleep state until VBUS/ID change detected*/ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 492 | /*twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);*/ |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 493 | |
| 494 | /* input to VUSB3V1 LDO is from VBAT, not VBUS */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 495 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 496 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 497 | /* Initialize 3.1V regulator */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 498 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 499 | |
Kishon Vijay Abraham I | 9166902 | 2013-03-15 18:58:51 +0530 | [diff] [blame] | 500 | twl->usb3v1 = devm_regulator_get(twl->dev, "usb3v1"); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 501 | if (IS_ERR(twl->usb3v1)) |
| 502 | return -ENODEV; |
| 503 | |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 504 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 505 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 506 | /* Initialize 1.5V regulator */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 507 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 508 | |
Kishon Vijay Abraham I | 9166902 | 2013-03-15 18:58:51 +0530 | [diff] [blame] | 509 | twl->usb1v5 = devm_regulator_get(twl->dev, "usb1v5"); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 510 | if (IS_ERR(twl->usb1v5)) |
Kishon Vijay Abraham I | 9166902 | 2013-03-15 18:58:51 +0530 | [diff] [blame] | 511 | return -ENODEV; |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 512 | |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 513 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 514 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 515 | /* Initialize 1.8V regulator */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 516 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 517 | |
Kishon Vijay Abraham I | 9166902 | 2013-03-15 18:58:51 +0530 | [diff] [blame] | 518 | twl->usb1v8 = devm_regulator_get(twl->dev, "usb1v8"); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 519 | if (IS_ERR(twl->usb1v8)) |
Kishon Vijay Abraham I | 9166902 | 2013-03-15 18:58:51 +0530 | [diff] [blame] | 520 | return -ENODEV; |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 521 | |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 522 | twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 523 | |
| 524 | /* disable access to power configuration registers */ |
Peter Ujfalusi | 9d94e16 | 2012-11-13 10:43:38 +0100 | [diff] [blame] | 525 | twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0, |
| 526 | TWL4030_PM_MASTER_PROTECT_KEY); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 527 | |
| 528 | return 0; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 529 | } |
| 530 | |
| 531 | static ssize_t twl4030_usb_vbus_show(struct device *dev, |
| 532 | struct device_attribute *attr, char *buf) |
| 533 | { |
| 534 | struct twl4030_usb *twl = dev_get_drvdata(dev); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 535 | int ret = -EINVAL; |
| 536 | |
Tony Lindgren | dcc35b2 | 2014-08-27 16:28:11 -0700 | [diff] [blame] | 537 | mutex_lock(&twl->lock); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 538 | ret = sprintf(buf, "%s\n", |
Matthias Kaehlcke | a87103a | 2011-04-01 23:02:07 +0200 | [diff] [blame] | 539 | twl->vbus_supplied ? "on" : "off"); |
Tony Lindgren | dcc35b2 | 2014-08-27 16:28:11 -0700 | [diff] [blame] | 540 | mutex_unlock(&twl->lock); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 541 | |
| 542 | return ret; |
| 543 | } |
| 544 | static DEVICE_ATTR(vbus, 0444, twl4030_usb_vbus_show, NULL); |
| 545 | |
| 546 | static irqreturn_t twl4030_usb_irq(int irq, void *_twl) |
| 547 | { |
| 548 | struct twl4030_usb *twl = _twl; |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 549 | enum musb_vbus_id_status status; |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 550 | bool status_changed = false; |
Tony Lindgren | 12b7db2 | 2016-05-31 10:05:19 -0500 | [diff] [blame] | 551 | int err; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 552 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 553 | status = twl4030_usb_linkstat(twl); |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 554 | |
Tony Lindgren | dcc35b2 | 2014-08-27 16:28:11 -0700 | [diff] [blame] | 555 | mutex_lock(&twl->lock); |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 556 | if (status >= 0 && status != twl->linkstat) { |
NeilBrown | 56301df | 2015-04-16 18:03:04 +1000 | [diff] [blame] | 557 | status_changed = |
| 558 | cable_present(twl->linkstat) != |
| 559 | cable_present(status); |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 560 | twl->linkstat = status; |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 561 | } |
Tony Lindgren | dcc35b2 | 2014-08-27 16:28:11 -0700 | [diff] [blame] | 562 | mutex_unlock(&twl->lock); |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 563 | |
| 564 | if (status_changed) { |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 565 | /* FIXME add a set_power() method so that B-devices can |
| 566 | * configure the charger appropriately. It's not always |
| 567 | * correct to consume VBUS power, and how much current to |
| 568 | * consume is a function of the USB configuration chosen |
| 569 | * by the host. |
| 570 | * |
| 571 | * REVISIT usb_gadget_vbus_connect(...) as needed, ditto |
| 572 | * its disconnect() sibling, when changing to/from the |
| 573 | * USB_LINK_VBUS state. musb_hdrc won't care until it |
| 574 | * starts to handle softconnect right. |
| 575 | */ |
NeilBrown | 56301df | 2015-04-16 18:03:04 +1000 | [diff] [blame] | 576 | if (cable_present(status)) { |
| 577 | pm_runtime_get_sync(twl->dev); |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 578 | } else { |
NeilBrown | 56301df | 2015-04-16 18:03:04 +1000 | [diff] [blame] | 579 | pm_runtime_mark_last_busy(twl->dev); |
| 580 | pm_runtime_put_autosuspend(twl->dev); |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 581 | } |
Andreas Kemnade | 78489c7 | 2016-08-22 21:24:22 +0200 | [diff] [blame] | 582 | twl->musb_mailbox_pending = true; |
| 583 | } |
| 584 | if (twl->musb_mailbox_pending) { |
Tony Lindgren | 12b7db2 | 2016-05-31 10:05:19 -0500 | [diff] [blame] | 585 | err = musb_mailbox(status); |
Andreas Kemnade | 78489c7 | 2016-08-22 21:24:22 +0200 | [diff] [blame] | 586 | if (!err) |
| 587 | twl->musb_mailbox_pending = false; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 588 | } |
Tony Lindgren | 85601b8 | 2014-08-24 17:44:22 +0530 | [diff] [blame] | 589 | |
| 590 | /* don't schedule during sleep - irq works right then */ |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 591 | if (status == MUSB_ID_GROUND && pm_runtime_active(twl->dev)) { |
Tony Lindgren | 85601b8 | 2014-08-24 17:44:22 +0530 | [diff] [blame] | 592 | cancel_delayed_work(&twl->id_workaround_work); |
| 593 | schedule_delayed_work(&twl->id_workaround_work, HZ); |
| 594 | } |
| 595 | |
| 596 | if (irq) |
| 597 | sysfs_notify(&twl->dev->kobj, NULL, "vbus"); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 598 | |
| 599 | return IRQ_HANDLED; |
| 600 | } |
| 601 | |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 602 | static void twl4030_id_workaround_work(struct work_struct *work) |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 603 | { |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 604 | struct twl4030_usb *twl = container_of(work, struct twl4030_usb, |
| 605 | id_workaround_work.work); |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 606 | |
Tony Lindgren | 85601b8 | 2014-08-24 17:44:22 +0530 | [diff] [blame] | 607 | twl4030_usb_irq(0, twl); |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 608 | } |
| 609 | |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 610 | static int twl4030_phy_init(struct phy *phy) |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 611 | { |
Kishon Vijay Abraham I | f1ddc24c9 | 2013-09-27 11:53:31 +0530 | [diff] [blame] | 612 | struct twl4030_usb *twl = phy_get_drvdata(phy); |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 613 | |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 614 | pm_runtime_get_sync(twl->dev); |
Tony Lindgren | 12b7db2 | 2016-05-31 10:05:19 -0500 | [diff] [blame] | 615 | twl->linkstat = MUSB_UNKNOWN; |
| 616 | schedule_delayed_work(&twl->id_workaround_work, HZ); |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 617 | pm_runtime_mark_last_busy(twl->dev); |
| 618 | pm_runtime_put_autosuspend(twl->dev); |
| 619 | |
Kishon Vijay Abraham I | 817e5f3 | 2013-03-15 18:58:52 +0530 | [diff] [blame] | 620 | return 0; |
Ming Lei | fc8f2a7 | 2010-09-06 23:27:09 +0800 | [diff] [blame] | 621 | } |
| 622 | |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 623 | static int twl4030_set_peripheral(struct usb_otg *otg, |
| 624 | struct usb_gadget *gadget) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 625 | { |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 626 | if (!otg) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 627 | return -ENODEV; |
| 628 | |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 629 | otg->gadget = gadget; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 630 | if (!gadget) |
Felipe Balbi | 8b9ca27 | 2014-11-07 09:06:04 -0600 | [diff] [blame] | 631 | otg->state = OTG_STATE_UNDEFINED; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 632 | |
| 633 | return 0; |
| 634 | } |
| 635 | |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 636 | 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] | 637 | { |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 638 | if (!otg) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 639 | return -ENODEV; |
| 640 | |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 641 | otg->host = host; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 642 | if (!host) |
Felipe Balbi | 8b9ca27 | 2014-11-07 09:06:04 -0600 | [diff] [blame] | 643 | otg->state = OTG_STATE_UNDEFINED; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 644 | |
| 645 | return 0; |
| 646 | } |
| 647 | |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 648 | static const struct phy_ops ops = { |
| 649 | .init = twl4030_phy_init, |
| 650 | .power_on = twl4030_phy_power_on, |
| 651 | .power_off = twl4030_phy_power_off, |
| 652 | .owner = THIS_MODULE, |
| 653 | }; |
| 654 | |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 655 | static const struct dev_pm_ops twl4030_usb_pm_ops = { |
| 656 | SET_RUNTIME_PM_OPS(twl4030_usb_runtime_suspend, |
| 657 | twl4030_usb_runtime_resume, NULL) |
| 658 | }; |
| 659 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 660 | static int twl4030_usb_probe(struct platform_device *pdev) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 661 | { |
Jingoo Han | 19f9e18 | 2013-07-30 17:02:13 +0900 | [diff] [blame] | 662 | struct twl4030_usb_data *pdata = dev_get_platdata(&pdev->dev); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 663 | struct twl4030_usb *twl; |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 664 | struct phy *phy; |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 665 | int status, err; |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 666 | struct usb_otg *otg; |
Kishon Vijay Abraham I | f8515f0 | 2012-09-06 20:27:09 +0530 | [diff] [blame] | 667 | struct device_node *np = pdev->dev.of_node; |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 668 | struct phy_provider *phy_provider; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 669 | |
Sachin Kamat | b6d790f | 2014-02-03 13:55:03 +0530 | [diff] [blame] | 670 | twl = devm_kzalloc(&pdev->dev, sizeof(*twl), GFP_KERNEL); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 671 | if (!twl) |
| 672 | return -ENOMEM; |
| 673 | |
Kishon Vijay Abraham I | f8515f0 | 2012-09-06 20:27:09 +0530 | [diff] [blame] | 674 | if (np) |
| 675 | of_property_read_u32(np, "usb_mode", |
| 676 | (enum twl4030_usb_mode *)&twl->usb_mode); |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 677 | else if (pdata) { |
Kishon Vijay Abraham I | f8515f0 | 2012-09-06 20:27:09 +0530 | [diff] [blame] | 678 | twl->usb_mode = pdata->usb_mode; |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 679 | } else { |
Kishon Vijay Abraham I | f8515f0 | 2012-09-06 20:27:09 +0530 | [diff] [blame] | 680 | dev_err(&pdev->dev, "twl4030 initialized without pdata\n"); |
| 681 | return -EINVAL; |
| 682 | } |
| 683 | |
Sachin Kamat | b6d790f | 2014-02-03 13:55:03 +0530 | [diff] [blame] | 684 | otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL); |
Kishon Vijay Abraham I | b8a3efa | 2012-06-22 17:40:55 +0530 | [diff] [blame] | 685 | if (!otg) |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 686 | return -ENOMEM; |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 687 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 688 | twl->dev = &pdev->dev; |
| 689 | twl->irq = platform_get_irq(pdev, 0); |
Matthias Kaehlcke | a87103a | 2011-04-01 23:02:07 +0200 | [diff] [blame] | 690 | twl->vbus_supplied = false; |
Tony Lindgren | 8055555 | 2015-11-30 21:37:12 -0800 | [diff] [blame] | 691 | twl->linkstat = MUSB_UNKNOWN; |
Andreas Kemnade | 78489c7 | 2016-08-22 21:24:22 +0200 | [diff] [blame] | 692 | twl->musb_mailbox_pending = false; |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 693 | |
| 694 | twl->phy.dev = twl->dev; |
| 695 | twl->phy.label = "twl4030"; |
| 696 | twl->phy.otg = otg; |
Kishon Vijay Abraham I | c11747f | 2013-01-25 08:03:24 +0530 | [diff] [blame] | 697 | twl->phy.type = USB_PHY_TYPE_USB2; |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 698 | |
Felipe Balbi | 8b9ca27 | 2014-11-07 09:06:04 -0600 | [diff] [blame] | 699 | otg->usb_phy = &twl->phy; |
Heikki Krogerus | 74d4aa4 | 2012-02-13 13:24:11 +0200 | [diff] [blame] | 700 | otg->set_host = twl4030_set_host; |
| 701 | otg->set_peripheral = twl4030_set_peripheral; |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 702 | |
Heikki Krogerus | dbc9863 | 2014-11-19 17:28:21 +0200 | [diff] [blame] | 703 | phy = devm_phy_create(twl->dev, NULL, &ops); |
Kishon Vijay Abraham I | 6747caa | 2013-09-27 11:53:27 +0530 | [diff] [blame] | 704 | if (IS_ERR(phy)) { |
| 705 | dev_dbg(&pdev->dev, "Failed to create PHY\n"); |
| 706 | return PTR_ERR(phy); |
| 707 | } |
| 708 | |
| 709 | phy_set_drvdata(phy, twl); |
| 710 | |
Kishon Vijay Abraham I | 64fe189 | 2014-02-17 14:29:25 +0530 | [diff] [blame] | 711 | phy_provider = devm_of_phy_provider_register(twl->dev, |
| 712 | of_phy_simple_xlate); |
| 713 | if (IS_ERR(phy_provider)) |
| 714 | return PTR_ERR(phy_provider); |
| 715 | |
Tony Lindgren | dcc35b2 | 2014-08-27 16:28:11 -0700 | [diff] [blame] | 716 | /* init mutex for workqueue */ |
| 717 | mutex_init(&twl->lock); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 718 | |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 719 | INIT_DELAYED_WORK(&twl->id_workaround_work, twl4030_id_workaround_work); |
| 720 | |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 721 | err = twl4030_usb_ldo_init(twl); |
| 722 | if (err) { |
| 723 | dev_err(&pdev->dev, "ldo init failed\n"); |
Jouni Hogander | 6676016 | 2009-02-20 14:02:31 +0200 | [diff] [blame] | 724 | return err; |
| 725 | } |
Kishon Vijay Abraham I | c11747f | 2013-01-25 08:03:24 +0530 | [diff] [blame] | 726 | usb_add_phy_dev(&twl->phy); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 727 | |
| 728 | platform_set_drvdata(pdev, twl); |
| 729 | if (device_create_file(&pdev->dev, &dev_attr_vbus)) |
| 730 | dev_warn(&pdev->dev, "could not create sysfs file\n"); |
| 731 | |
Pali Rohár | 80d2e76 | 2013-09-18 19:03:33 +0200 | [diff] [blame] | 732 | ATOMIC_INIT_NOTIFIER_HEAD(&twl->phy.notifier); |
| 733 | |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 734 | pm_runtime_use_autosuspend(&pdev->dev); |
| 735 | pm_runtime_set_autosuspend_delay(&pdev->dev, 2000); |
| 736 | pm_runtime_enable(&pdev->dev); |
Tony Lindgren | 58a66db | 2015-11-30 21:39:54 -0800 | [diff] [blame] | 737 | pm_runtime_get_sync(&pdev->dev); |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 738 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 739 | /* Our job is to use irqs and status from the power module |
| 740 | * to keep the transceiver disabled when nothing's connected. |
| 741 | * |
| 742 | * FIXME we actually shouldn't start enabling it until the |
| 743 | * USB controller drivers have said they're ready, by calling |
| 744 | * set_host() and/or set_peripheral() ... OTG_capable boards |
| 745 | * need both handles, otherwise just one suffices. |
| 746 | */ |
Kishon Vijay Abraham I | 9166902 | 2013-03-15 18:58:51 +0530 | [diff] [blame] | 747 | status = devm_request_threaded_irq(twl->dev, twl->irq, NULL, |
| 748 | twl4030_usb_irq, IRQF_TRIGGER_FALLING | |
| 749 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, "twl4030_usb", twl); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 750 | if (status < 0) { |
| 751 | dev_dbg(&pdev->dev, "can't get IRQ %d, err %d\n", |
| 752 | twl->irq, status); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 753 | return status; |
| 754 | } |
| 755 | |
Heikki Krogerus | 61211b1 | 2014-11-19 17:28:19 +0200 | [diff] [blame] | 756 | if (pdata) |
| 757 | err = phy_create_lookup(phy, "usb", "musb-hdrc.0"); |
| 758 | if (err) |
| 759 | return err; |
| 760 | |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 761 | pm_runtime_mark_last_busy(&pdev->dev); |
| 762 | pm_runtime_put_autosuspend(twl->dev); |
| 763 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 764 | dev_info(&pdev->dev, "Initialized TWL4030 USB module\n"); |
| 765 | return 0; |
| 766 | } |
| 767 | |
Dmitry Torokhov | 39d3568 | 2013-02-24 00:55:07 -0800 | [diff] [blame] | 768 | static int twl4030_usb_remove(struct platform_device *pdev) |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 769 | { |
| 770 | struct twl4030_usb *twl = platform_get_drvdata(pdev); |
| 771 | int val; |
| 772 | |
Tony Lindgren | b241d31 | 2015-11-30 21:39:53 -0800 | [diff] [blame] | 773 | usb_remove_phy(&twl->phy); |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 774 | pm_runtime_get_sync(twl->dev); |
Grazvydas Ignotas | 249751f | 2013-03-17 20:23:24 +0200 | [diff] [blame] | 775 | cancel_delayed_work(&twl->id_workaround_work); |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 776 | device_remove_file(twl->dev, &dev_attr_vbus); |
| 777 | |
| 778 | /* set transceiver mode to power on defaults */ |
| 779 | twl4030_usb_set_mode(twl, -1); |
| 780 | |
Tony Lindgren | 58a66db | 2015-11-30 21:39:54 -0800 | [diff] [blame] | 781 | /* idle ulpi before powering off */ |
| 782 | if (cable_present(twl->linkstat)) |
| 783 | pm_runtime_put_noidle(twl->dev); |
| 784 | pm_runtime_mark_last_busy(twl->dev); |
Tony Lindgren | 12b7db2 | 2016-05-31 10:05:19 -0500 | [diff] [blame] | 785 | pm_runtime_dont_use_autosuspend(&pdev->dev); |
| 786 | pm_runtime_put_sync(twl->dev); |
Tony Lindgren | 58a66db | 2015-11-30 21:39:54 -0800 | [diff] [blame] | 787 | pm_runtime_disable(twl->dev); |
| 788 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 789 | /* autogate 60MHz ULPI clock, |
| 790 | * clear dpll clock request for i2c access, |
| 791 | * disable 32KHz |
| 792 | */ |
| 793 | val = twl4030_usb_read(twl, PHY_CLK_CTRL); |
| 794 | if (val >= 0) { |
| 795 | val |= PHY_CLK_CTRL_CLOCKGATING_EN; |
| 796 | val &= ~(PHY_CLK_CTRL_CLK32K_EN | REQ_PHY_DPLL_CLK); |
| 797 | twl4030_usb_write(twl, PHY_CLK_CTRL, (u8)val); |
| 798 | } |
| 799 | |
| 800 | /* disable complete OTG block */ |
| 801 | twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB); |
NeilBrown | 56301df | 2015-04-16 18:03:04 +1000 | [diff] [blame] | 802 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 803 | return 0; |
| 804 | } |
| 805 | |
Kishon Vijay Abraham I | f8515f0 | 2012-09-06 20:27:09 +0530 | [diff] [blame] | 806 | #ifdef CONFIG_OF |
| 807 | static const struct of_device_id twl4030_usb_id_table[] = { |
| 808 | { .compatible = "ti,twl4030-usb" }, |
| 809 | {} |
| 810 | }; |
| 811 | MODULE_DEVICE_TABLE(of, twl4030_usb_id_table); |
| 812 | #endif |
| 813 | |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 814 | static struct platform_driver twl4030_usb_driver = { |
| 815 | .probe = twl4030_usb_probe, |
Dmitry Torokhov | 39d3568 | 2013-02-24 00:55:07 -0800 | [diff] [blame] | 816 | .remove = twl4030_usb_remove, |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 817 | .driver = { |
| 818 | .name = "twl4030_usb", |
Tony Lindgren | 96be39a | 2014-08-20 12:07:00 -0700 | [diff] [blame] | 819 | .pm = &twl4030_usb_pm_ops, |
Kishon Vijay Abraham I | f8515f0 | 2012-09-06 20:27:09 +0530 | [diff] [blame] | 820 | .of_match_table = of_match_ptr(twl4030_usb_id_table), |
David Brownell | 9ebd961 | 2008-12-18 12:25:44 -0800 | [diff] [blame] | 821 | }, |
| 822 | }; |
| 823 | |
| 824 | static int __init twl4030_usb_init(void) |
| 825 | { |
| 826 | return platform_driver_register(&twl4030_usb_driver); |
| 827 | } |
| 828 | subsys_initcall(twl4030_usb_init); |
| 829 | |
| 830 | static void __exit twl4030_usb_exit(void) |
| 831 | { |
| 832 | platform_driver_unregister(&twl4030_usb_driver); |
| 833 | } |
| 834 | module_exit(twl4030_usb_exit); |
| 835 | |
| 836 | MODULE_ALIAS("platform:twl4030_usb"); |
| 837 | MODULE_AUTHOR("Texas Instruments, Inc, Nokia Corporation"); |
| 838 | MODULE_DESCRIPTION("TWL4030 USB transceiver driver"); |
| 839 | MODULE_LICENSE("GPL"); |