Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 1 | /* |
| 2 | * TWL4030/TPS65950 BCI (Battery Charger Interface) driver |
| 3 | * |
| 4 | * Copyright (C) 2010 Gražvydas Ignotas <notasas@gmail.com> |
| 5 | * |
| 6 | * based on twl4030_bci_battery.c by TI |
| 7 | * Copyright (C) 2008 Texas Instruments, Inc. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/slab.h> |
Kishon Vijay Abraham I | ded017e | 2012-06-26 17:40:32 +0530 | [diff] [blame] | 18 | #include <linux/err.h> |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 19 | #include <linux/platform_device.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/i2c/twl.h> |
| 22 | #include <linux/power_supply.h> |
| 23 | #include <linux/notifier.h> |
| 24 | #include <linux/usb/otg.h> |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 25 | #include <linux/i2c/twl4030-madc.h> |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 26 | |
| 27 | #define TWL4030_BCIMSTATEC 0x02 |
| 28 | #define TWL4030_BCIICHG 0x08 |
| 29 | #define TWL4030_BCIVAC 0x0a |
| 30 | #define TWL4030_BCIVBUS 0x0c |
Nishanth Menon | 61a7784 | 2014-05-28 16:46:49 -0500 | [diff] [blame] | 31 | #define TWL4030_BCIMFSTS3 0x0F |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 32 | #define TWL4030_BCIMFSTS4 0x10 |
| 33 | #define TWL4030_BCICTL1 0x23 |
NeilBrown | 210d4bc | 2012-05-09 07:40:40 +1000 | [diff] [blame] | 34 | #define TWL4030_BB_CFG 0x12 |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 35 | #define TWL4030_BCIIREF1 0x27 |
| 36 | #define TWL4030_BCIIREF2 0x28 |
| 37 | #define TWL4030_BCIMFKEY 0x11 |
| 38 | #define TWL4030_BCIMFTH8 0x1d |
| 39 | #define TWL4030_BCIMFTH9 0x1e |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 40 | |
Nishanth Menon | 61a7784 | 2014-05-28 16:46:49 -0500 | [diff] [blame] | 41 | #define TWL4030_BCIMFSTS1 0x01 |
| 42 | |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 43 | #define TWL4030_BCIAUTOWEN BIT(5) |
| 44 | #define TWL4030_CONFIG_DONE BIT(4) |
| 45 | #define TWL4030_BCIAUTOUSB BIT(1) |
| 46 | #define TWL4030_BCIAUTOAC BIT(0) |
| 47 | #define TWL4030_CGAIN BIT(5) |
| 48 | #define TWL4030_USBFASTMCHG BIT(2) |
| 49 | #define TWL4030_STS_VBUS BIT(7) |
| 50 | #define TWL4030_STS_USB_ID BIT(2) |
NeilBrown | 210d4bc | 2012-05-09 07:40:40 +1000 | [diff] [blame] | 51 | #define TWL4030_BBCHEN BIT(4) |
Il Han | 94b05ca | 2012-08-17 16:49:43 +0900 | [diff] [blame] | 52 | #define TWL4030_BBSEL_MASK 0x0c |
| 53 | #define TWL4030_BBSEL_2V5 0x00 |
| 54 | #define TWL4030_BBSEL_3V0 0x04 |
| 55 | #define TWL4030_BBSEL_3V1 0x08 |
| 56 | #define TWL4030_BBSEL_3V2 0x0c |
| 57 | #define TWL4030_BBISEL_MASK 0x03 |
| 58 | #define TWL4030_BBISEL_25uA 0x00 |
| 59 | #define TWL4030_BBISEL_150uA 0x01 |
| 60 | #define TWL4030_BBISEL_500uA 0x02 |
| 61 | #define TWL4030_BBISEL_1000uA 0x03 |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 62 | |
Nishanth Menon | 61a7784 | 2014-05-28 16:46:49 -0500 | [diff] [blame] | 63 | #define TWL4030_BATSTSPCHG BIT(2) |
| 64 | #define TWL4030_BATSTSMCHG BIT(6) |
| 65 | |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 66 | /* BCI interrupts */ |
| 67 | #define TWL4030_WOVF BIT(0) /* Watchdog overflow */ |
| 68 | #define TWL4030_TMOVF BIT(1) /* Timer overflow */ |
| 69 | #define TWL4030_ICHGHIGH BIT(2) /* Battery charge current high */ |
| 70 | #define TWL4030_ICHGLOW BIT(3) /* Battery cc. low / FSM state change */ |
| 71 | #define TWL4030_ICHGEOC BIT(4) /* Battery current end-of-charge */ |
| 72 | #define TWL4030_TBATOR2 BIT(5) /* Battery temperature out of range 2 */ |
| 73 | #define TWL4030_TBATOR1 BIT(6) /* Battery temperature out of range 1 */ |
| 74 | #define TWL4030_BATSTS BIT(7) /* Battery status */ |
| 75 | |
| 76 | #define TWL4030_VBATLVL BIT(0) /* VBAT level */ |
| 77 | #define TWL4030_VBATOV BIT(1) /* VBAT overvoltage */ |
| 78 | #define TWL4030_VBUSOV BIT(2) /* VBUS overvoltage */ |
| 79 | #define TWL4030_ACCHGOV BIT(3) /* Ac charger overvoltage */ |
| 80 | |
| 81 | #define TWL4030_MSTATEC_USB BIT(4) |
| 82 | #define TWL4030_MSTATEC_AC BIT(5) |
| 83 | #define TWL4030_MSTATEC_MASK 0x0f |
| 84 | #define TWL4030_MSTATEC_QUICK1 0x02 |
| 85 | #define TWL4030_MSTATEC_QUICK7 0x07 |
| 86 | #define TWL4030_MSTATEC_COMPLETE1 0x0b |
| 87 | #define TWL4030_MSTATEC_COMPLETE4 0x0e |
| 88 | |
| 89 | static bool allow_usb; |
Grazvydas Ignotas | 28d48f0 | 2011-06-03 14:43:11 +0300 | [diff] [blame] | 90 | module_param(allow_usb, bool, 0644); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 91 | MODULE_PARM_DESC(allow_usb, "Allow USB charge drawing default current"); |
| 92 | |
| 93 | struct twl4030_bci { |
| 94 | struct device *dev; |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 95 | struct power_supply *ac; |
| 96 | struct power_supply *usb; |
Heikki Krogerus | 8675381 | 2012-02-13 13:24:02 +0200 | [diff] [blame] | 97 | struct usb_phy *transceiver; |
Heikki Krogerus | fcc8ebc | 2012-02-13 13:24:16 +0200 | [diff] [blame] | 98 | struct notifier_block usb_nb; |
Heikki Krogerus | d6ccc44 | 2011-02-25 13:56:36 +0200 | [diff] [blame] | 99 | struct work_struct work; |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 100 | int irq_chg; |
| 101 | int irq_bci; |
NeilBrown | ab37813 | 2012-05-09 07:40:40 +1000 | [diff] [blame] | 102 | int usb_enabled; |
Heikki Krogerus | d6ccc44 | 2011-02-25 13:56:36 +0200 | [diff] [blame] | 103 | |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 104 | /* |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 105 | * ichg_* and *_cur values in uA. If any are 'large', we set |
| 106 | * CGAIN to '1' which doubles the range for half the |
| 107 | * precision. |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 108 | */ |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 109 | unsigned int ichg_eoc, ichg_lo, ichg_hi; |
| 110 | unsigned int usb_cur, ac_cur; |
| 111 | bool ac_is_active; |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 112 | |
Heikki Krogerus | d6ccc44 | 2011-02-25 13:56:36 +0200 | [diff] [blame] | 113 | unsigned long event; |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 114 | }; |
| 115 | |
| 116 | /* |
| 117 | * clear and set bits on an given register on a given module |
| 118 | */ |
| 119 | static int twl4030_clear_set(u8 mod_no, u8 clear, u8 set, u8 reg) |
| 120 | { |
| 121 | u8 val = 0; |
| 122 | int ret; |
| 123 | |
| 124 | ret = twl_i2c_read_u8(mod_no, &val, reg); |
| 125 | if (ret) |
| 126 | return ret; |
| 127 | |
| 128 | val &= ~clear; |
| 129 | val |= set; |
| 130 | |
| 131 | return twl_i2c_write_u8(mod_no, val, reg); |
| 132 | } |
| 133 | |
| 134 | static int twl4030_bci_read(u8 reg, u8 *val) |
| 135 | { |
Peter Ujfalusi | e9f14c1 | 2012-11-13 10:42:11 +0100 | [diff] [blame] | 136 | return twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, val, reg); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 137 | } |
| 138 | |
| 139 | static int twl4030_clear_set_boot_bci(u8 clear, u8 set) |
| 140 | { |
Peter Ujfalusi | e9f14c1 | 2012-11-13 10:42:11 +0100 | [diff] [blame] | 141 | return twl4030_clear_set(TWL_MODULE_PM_MASTER, clear, |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 142 | TWL4030_CONFIG_DONE | TWL4030_BCIAUTOWEN | set, |
| 143 | TWL4030_PM_MASTER_BOOT_BCI); |
| 144 | } |
| 145 | |
| 146 | static int twl4030bci_read_adc_val(u8 reg) |
| 147 | { |
| 148 | int ret, temp; |
| 149 | u8 val; |
| 150 | |
| 151 | /* read MSB */ |
| 152 | ret = twl4030_bci_read(reg + 1, &val); |
| 153 | if (ret) |
| 154 | return ret; |
| 155 | |
| 156 | temp = (int)(val & 0x03) << 8; |
| 157 | |
| 158 | /* read LSB */ |
| 159 | ret = twl4030_bci_read(reg, &val); |
| 160 | if (ret) |
| 161 | return ret; |
| 162 | |
| 163 | return temp | val; |
| 164 | } |
| 165 | |
| 166 | /* |
Nishanth Menon | 61a7784 | 2014-05-28 16:46:49 -0500 | [diff] [blame] | 167 | * Check if Battery Pack was present |
| 168 | */ |
| 169 | static int twl4030_is_battery_present(struct twl4030_bci *bci) |
| 170 | { |
| 171 | int ret; |
| 172 | u8 val = 0; |
| 173 | |
| 174 | /* Battery presence in Main charge? */ |
| 175 | ret = twl_i2c_read_u8(TWL_MODULE_MAIN_CHARGE, &val, TWL4030_BCIMFSTS3); |
| 176 | if (ret) |
| 177 | return ret; |
| 178 | if (val & TWL4030_BATSTSMCHG) |
| 179 | return 0; |
| 180 | |
| 181 | /* |
| 182 | * OK, It could be that bootloader did not enable main charger, |
| 183 | * pre-charge is h/w auto. So, Battery presence in Pre-charge? |
| 184 | */ |
| 185 | ret = twl_i2c_read_u8(TWL4030_MODULE_PRECHARGE, &val, |
| 186 | TWL4030_BCIMFSTS1); |
| 187 | if (ret) |
| 188 | return ret; |
| 189 | if (val & TWL4030_BATSTSPCHG) |
| 190 | return 0; |
| 191 | |
| 192 | return -ENODEV; |
| 193 | } |
| 194 | |
| 195 | /* |
NeilBrown | 3b542f0 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 196 | * TI provided formulas: |
| 197 | * CGAIN == 0: ICHG = (BCIICHG * 1.7) / (2^10 - 1) - 0.85 |
| 198 | * CGAIN == 1: ICHG = (BCIICHG * 3.4) / (2^10 - 1) - 1.7 |
| 199 | * Here we use integer approximation of: |
| 200 | * CGAIN == 0: val * 1.6618 - 0.85 * 1000 |
| 201 | * CGAIN == 1: (val * 1.6618 - 0.85 * 1000) * 2 |
| 202 | */ |
| 203 | /* |
| 204 | * convert twl register value for currents into uA |
| 205 | */ |
| 206 | static int regval2ua(int regval, bool cgain) |
| 207 | { |
| 208 | if (cgain) |
| 209 | return (regval * 16618 - 8500 * 1000) / 5; |
| 210 | else |
| 211 | return (regval * 16618 - 8500 * 1000) / 10; |
| 212 | } |
| 213 | |
| 214 | /* |
| 215 | * convert uA currents into twl register value |
| 216 | */ |
| 217 | static int ua2regval(int ua, bool cgain) |
| 218 | { |
| 219 | int ret; |
| 220 | if (cgain) |
| 221 | ua /= 2; |
| 222 | ret = (ua * 10 + 8500 * 1000) / 16618; |
| 223 | /* rounding problems */ |
| 224 | if (ret < 512) |
| 225 | ret = 512; |
| 226 | return ret; |
| 227 | } |
| 228 | |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 229 | static int twl4030_charger_update_current(struct twl4030_bci *bci) |
| 230 | { |
| 231 | int status; |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 232 | int cur; |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 233 | unsigned reg, cur_reg; |
| 234 | u8 bcictl1, oldreg, fullreg; |
| 235 | bool cgain = false; |
| 236 | u8 boot_bci; |
| 237 | |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 238 | /* |
| 239 | * If AC (Accessory Charger) voltage exceeds 4.5V (MADC 11) |
| 240 | * and AC is enabled, set current for 'ac' |
| 241 | */ |
| 242 | if (twl4030_get_madc_conversion(11) > 4500) { |
| 243 | cur = bci->ac_cur; |
| 244 | bci->ac_is_active = true; |
| 245 | } else { |
| 246 | cur = bci->usb_cur; |
| 247 | bci->ac_is_active = false; |
| 248 | } |
| 249 | |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 250 | /* First, check thresholds and see if cgain is needed */ |
| 251 | if (bci->ichg_eoc >= 200000) |
| 252 | cgain = true; |
| 253 | if (bci->ichg_lo >= 400000) |
| 254 | cgain = true; |
| 255 | if (bci->ichg_hi >= 820000) |
| 256 | cgain = true; |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 257 | if (cur > 852000) |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 258 | cgain = true; |
| 259 | |
| 260 | status = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); |
| 261 | if (status < 0) |
| 262 | return status; |
| 263 | if (twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &boot_bci, |
| 264 | TWL4030_PM_MASTER_BOOT_BCI) < 0) |
| 265 | boot_bci = 0; |
| 266 | boot_bci &= 7; |
| 267 | |
| 268 | if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN)) |
| 269 | /* Need to turn for charging while we change the |
| 270 | * CGAIN bit. Leave it off while everything is |
| 271 | * updated. |
| 272 | */ |
| 273 | twl4030_clear_set_boot_bci(boot_bci, 0); |
| 274 | |
| 275 | /* |
| 276 | * For ichg_eoc, the hardware only supports reg values matching |
| 277 | * 100XXXX000, and requires the XXXX be stored in the high nibble |
| 278 | * of TWL4030_BCIMFTH8. |
| 279 | */ |
| 280 | reg = ua2regval(bci->ichg_eoc, cgain); |
| 281 | if (reg > 0x278) |
| 282 | reg = 0x278; |
| 283 | if (reg < 0x200) |
| 284 | reg = 0x200; |
| 285 | reg = (reg >> 3) & 0xf; |
| 286 | fullreg = reg << 4; |
| 287 | |
| 288 | /* |
| 289 | * For ichg_lo, reg value must match 10XXXX0000. |
| 290 | * XXXX is stored in low nibble of TWL4030_BCIMFTH8. |
| 291 | */ |
| 292 | reg = ua2regval(bci->ichg_lo, cgain); |
| 293 | if (reg > 0x2F0) |
| 294 | reg = 0x2F0; |
| 295 | if (reg < 0x200) |
| 296 | reg = 0x200; |
| 297 | reg = (reg >> 4) & 0xf; |
| 298 | fullreg |= reg; |
| 299 | |
| 300 | /* ichg_eoc and ichg_lo live in same register */ |
| 301 | status = twl4030_bci_read(TWL4030_BCIMFTH8, &oldreg); |
| 302 | if (status < 0) |
| 303 | return status; |
| 304 | if (oldreg != fullreg) { |
| 305 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xF4, |
| 306 | TWL4030_BCIMFKEY); |
| 307 | if (status < 0) |
| 308 | return status; |
| 309 | twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, |
| 310 | fullreg, TWL4030_BCIMFTH8); |
| 311 | } |
| 312 | |
| 313 | /* ichg_hi threshold must be 1XXXX01100 (I think) */ |
| 314 | reg = ua2regval(bci->ichg_hi, cgain); |
| 315 | if (reg > 0x3E0) |
| 316 | reg = 0x3E0; |
| 317 | if (reg < 0x200) |
| 318 | reg = 0x200; |
| 319 | fullreg = (reg >> 5) & 0xF; |
| 320 | fullreg <<= 4; |
| 321 | status = twl4030_bci_read(TWL4030_BCIMFTH9, &oldreg); |
| 322 | if (status < 0) |
| 323 | return status; |
| 324 | if ((oldreg & 0xF0) != fullreg) { |
| 325 | fullreg |= (oldreg & 0x0F); |
| 326 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, |
| 327 | TWL4030_BCIMFKEY); |
| 328 | if (status < 0) |
| 329 | return status; |
| 330 | twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, |
| 331 | fullreg, TWL4030_BCIMFTH9); |
| 332 | } |
| 333 | |
| 334 | /* |
| 335 | * And finally, set the current. This is stored in |
| 336 | * two registers. |
| 337 | */ |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 338 | reg = ua2regval(cur, cgain); |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 339 | /* we have only 10 bits */ |
| 340 | if (reg > 0x3ff) |
| 341 | reg = 0x3ff; |
| 342 | status = twl4030_bci_read(TWL4030_BCIIREF1, &oldreg); |
| 343 | if (status < 0) |
| 344 | return status; |
| 345 | cur_reg = oldreg; |
| 346 | status = twl4030_bci_read(TWL4030_BCIIREF2, &oldreg); |
| 347 | if (status < 0) |
| 348 | return status; |
| 349 | cur_reg |= oldreg << 8; |
| 350 | if (reg != oldreg) { |
| 351 | /* disable write protection for one write access for |
| 352 | * BCIIREF */ |
| 353 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, |
| 354 | TWL4030_BCIMFKEY); |
| 355 | if (status < 0) |
| 356 | return status; |
| 357 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, |
| 358 | (reg & 0x100) ? 3 : 2, |
| 359 | TWL4030_BCIIREF2); |
| 360 | if (status < 0) |
| 361 | return status; |
| 362 | /* disable write protection for one write access for |
| 363 | * BCIIREF */ |
| 364 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, 0xE7, |
| 365 | TWL4030_BCIMFKEY); |
| 366 | if (status < 0) |
| 367 | return status; |
| 368 | status = twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, |
| 369 | reg & 0xff, |
| 370 | TWL4030_BCIIREF1); |
| 371 | } |
| 372 | if ((!!cgain) != !!(bcictl1 & TWL4030_CGAIN)) { |
| 373 | /* Flip CGAIN and re-enable charging */ |
| 374 | bcictl1 ^= TWL4030_CGAIN; |
| 375 | twl_i2c_write_u8(TWL_MODULE_MAIN_CHARGE, |
| 376 | bcictl1, TWL4030_BCICTL1); |
| 377 | twl4030_clear_set_boot_bci(0, boot_bci); |
| 378 | } |
| 379 | return 0; |
| 380 | } |
| 381 | |
NeilBrown | 3b542f0 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 382 | /* |
NeilBrown | 9c645d2 | 2012-05-09 07:40:39 +1000 | [diff] [blame] | 383 | * Enable/Disable USB Charge functionality. |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 384 | */ |
| 385 | static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable) |
| 386 | { |
| 387 | int ret; |
| 388 | |
NeilBrown | e57c4a6 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 389 | if (enable && !IS_ERR_OR_NULL(bci->transceiver)) { |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 390 | |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 391 | twl4030_charger_update_current(bci); |
| 392 | |
NeilBrown | e57c4a6 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 393 | /* Need to keep phy powered */ |
NeilBrown | ab37813 | 2012-05-09 07:40:40 +1000 | [diff] [blame] | 394 | if (!bci->usb_enabled) { |
NeilBrown | e57c4a6 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 395 | pm_runtime_get_sync(bci->transceiver->dev); |
NeilBrown | ab37813 | 2012-05-09 07:40:40 +1000 | [diff] [blame] | 396 | bci->usb_enabled = 1; |
| 397 | } |
| 398 | |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 399 | /* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */ |
| 400 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB); |
| 401 | if (ret < 0) |
| 402 | return ret; |
| 403 | |
| 404 | /* forcing USBFASTMCHG(BCIMFSTS4[2]) to 1 */ |
Peter Ujfalusi | e9f14c1 | 2012-11-13 10:42:11 +0100 | [diff] [blame] | 405 | ret = twl4030_clear_set(TWL_MODULE_MAIN_CHARGE, 0, |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 406 | TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4); |
| 407 | } else { |
| 408 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0); |
NeilBrown | ab37813 | 2012-05-09 07:40:40 +1000 | [diff] [blame] | 409 | if (bci->usb_enabled) { |
NeilBrown | e57c4a6 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 410 | pm_runtime_mark_last_busy(bci->transceiver->dev); |
| 411 | pm_runtime_put_autosuspend(bci->transceiver->dev); |
NeilBrown | ab37813 | 2012-05-09 07:40:40 +1000 | [diff] [blame] | 412 | bci->usb_enabled = 0; |
| 413 | } |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 414 | } |
| 415 | |
| 416 | return ret; |
| 417 | } |
| 418 | |
| 419 | /* |
| 420 | * Enable/Disable AC Charge funtionality. |
| 421 | */ |
| 422 | static int twl4030_charger_enable_ac(bool enable) |
| 423 | { |
| 424 | int ret; |
| 425 | |
| 426 | if (enable) |
| 427 | ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOAC); |
| 428 | else |
| 429 | ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOAC, 0); |
| 430 | |
| 431 | return ret; |
| 432 | } |
| 433 | |
| 434 | /* |
NeilBrown | 210d4bc | 2012-05-09 07:40:40 +1000 | [diff] [blame] | 435 | * Enable/Disable charging of Backup Battery. |
| 436 | */ |
| 437 | static int twl4030_charger_enable_backup(int uvolt, int uamp) |
| 438 | { |
| 439 | int ret; |
| 440 | u8 flags; |
| 441 | |
| 442 | if (uvolt < 2500000 || |
| 443 | uamp < 25) { |
| 444 | /* disable charging of backup battery */ |
Peter Ujfalusi | e9f14c1 | 2012-11-13 10:42:11 +0100 | [diff] [blame] | 445 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
NeilBrown | 210d4bc | 2012-05-09 07:40:40 +1000 | [diff] [blame] | 446 | TWL4030_BBCHEN, 0, TWL4030_BB_CFG); |
| 447 | return ret; |
| 448 | } |
| 449 | |
| 450 | flags = TWL4030_BBCHEN; |
| 451 | if (uvolt >= 3200000) |
| 452 | flags |= TWL4030_BBSEL_3V2; |
| 453 | else if (uvolt >= 3100000) |
| 454 | flags |= TWL4030_BBSEL_3V1; |
| 455 | else if (uvolt >= 3000000) |
| 456 | flags |= TWL4030_BBSEL_3V0; |
| 457 | else |
| 458 | flags |= TWL4030_BBSEL_2V5; |
| 459 | |
| 460 | if (uamp >= 1000) |
| 461 | flags |= TWL4030_BBISEL_1000uA; |
| 462 | else if (uamp >= 500) |
| 463 | flags |= TWL4030_BBISEL_500uA; |
| 464 | else if (uamp >= 150) |
| 465 | flags |= TWL4030_BBISEL_150uA; |
| 466 | else |
| 467 | flags |= TWL4030_BBISEL_25uA; |
| 468 | |
Peter Ujfalusi | e9f14c1 | 2012-11-13 10:42:11 +0100 | [diff] [blame] | 469 | ret = twl4030_clear_set(TWL_MODULE_PM_RECEIVER, |
NeilBrown | 210d4bc | 2012-05-09 07:40:40 +1000 | [diff] [blame] | 470 | TWL4030_BBSEL_MASK | TWL4030_BBISEL_MASK, |
| 471 | flags, |
| 472 | TWL4030_BB_CFG); |
| 473 | |
| 474 | return ret; |
| 475 | } |
| 476 | |
| 477 | /* |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 478 | * TWL4030 CHG_PRES (AC charger presence) events |
| 479 | */ |
| 480 | static irqreturn_t twl4030_charger_interrupt(int irq, void *arg) |
| 481 | { |
| 482 | struct twl4030_bci *bci = arg; |
| 483 | |
| 484 | dev_dbg(bci->dev, "CHG_PRES irq\n"); |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 485 | twl4030_charger_update_current(bci); |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 486 | power_supply_changed(bci->ac); |
| 487 | power_supply_changed(bci->usb); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 488 | |
| 489 | return IRQ_HANDLED; |
| 490 | } |
| 491 | |
| 492 | /* |
| 493 | * TWL4030 BCI monitoring events |
| 494 | */ |
| 495 | static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) |
| 496 | { |
| 497 | struct twl4030_bci *bci = arg; |
| 498 | u8 irqs1, irqs2; |
| 499 | int ret; |
| 500 | |
| 501 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1, |
| 502 | TWL4030_INTERRUPTS_BCIISR1A); |
| 503 | if (ret < 0) |
| 504 | return IRQ_HANDLED; |
| 505 | |
| 506 | ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs2, |
| 507 | TWL4030_INTERRUPTS_BCIISR2A); |
| 508 | if (ret < 0) |
| 509 | return IRQ_HANDLED; |
| 510 | |
| 511 | dev_dbg(bci->dev, "BCI irq %02x %02x\n", irqs2, irqs1); |
| 512 | |
| 513 | if (irqs1 & (TWL4030_ICHGLOW | TWL4030_ICHGEOC)) { |
| 514 | /* charger state change, inform the core */ |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 515 | power_supply_changed(bci->ac); |
| 516 | power_supply_changed(bci->usb); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 517 | } |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 518 | twl4030_charger_update_current(bci); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 519 | |
| 520 | /* various monitoring events, for now we just log them here */ |
| 521 | if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1)) |
| 522 | dev_warn(bci->dev, "battery temperature out of range\n"); |
| 523 | |
| 524 | if (irqs1 & TWL4030_BATSTS) |
| 525 | dev_crit(bci->dev, "battery disconnected\n"); |
| 526 | |
| 527 | if (irqs2 & TWL4030_VBATOV) |
| 528 | dev_crit(bci->dev, "VBAT overvoltage\n"); |
| 529 | |
| 530 | if (irqs2 & TWL4030_VBUSOV) |
| 531 | dev_crit(bci->dev, "VBUS overvoltage\n"); |
| 532 | |
| 533 | if (irqs2 & TWL4030_ACCHGOV) |
| 534 | dev_crit(bci->dev, "Ac charger overvoltage\n"); |
| 535 | |
| 536 | return IRQ_HANDLED; |
| 537 | } |
| 538 | |
Heikki Krogerus | d6ccc44 | 2011-02-25 13:56:36 +0200 | [diff] [blame] | 539 | static void twl4030_bci_usb_work(struct work_struct *data) |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 540 | { |
Heikki Krogerus | d6ccc44 | 2011-02-25 13:56:36 +0200 | [diff] [blame] | 541 | struct twl4030_bci *bci = container_of(data, struct twl4030_bci, work); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 542 | |
Heikki Krogerus | d6ccc44 | 2011-02-25 13:56:36 +0200 | [diff] [blame] | 543 | switch (bci->event) { |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 544 | case USB_EVENT_VBUS: |
| 545 | case USB_EVENT_CHARGER: |
| 546 | twl4030_charger_enable_usb(bci, true); |
| 547 | break; |
| 548 | case USB_EVENT_NONE: |
| 549 | twl4030_charger_enable_usb(bci, false); |
| 550 | break; |
| 551 | } |
Heikki Krogerus | d6ccc44 | 2011-02-25 13:56:36 +0200 | [diff] [blame] | 552 | } |
| 553 | |
| 554 | static int twl4030_bci_usb_ncb(struct notifier_block *nb, unsigned long val, |
| 555 | void *priv) |
| 556 | { |
Heikki Krogerus | fcc8ebc | 2012-02-13 13:24:16 +0200 | [diff] [blame] | 557 | struct twl4030_bci *bci = container_of(nb, struct twl4030_bci, usb_nb); |
Heikki Krogerus | d6ccc44 | 2011-02-25 13:56:36 +0200 | [diff] [blame] | 558 | |
| 559 | dev_dbg(bci->dev, "OTG notify %lu\n", val); |
| 560 | |
| 561 | bci->event = val; |
| 562 | schedule_work(&bci->work); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 563 | |
| 564 | return NOTIFY_OK; |
| 565 | } |
| 566 | |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 567 | static int twl4030_charger_get_current(void) |
| 568 | { |
| 569 | int curr; |
| 570 | int ret; |
| 571 | u8 bcictl1; |
| 572 | |
| 573 | curr = twl4030bci_read_adc_val(TWL4030_BCIICHG); |
| 574 | if (curr < 0) |
| 575 | return curr; |
| 576 | |
| 577 | ret = twl4030_bci_read(TWL4030_BCICTL1, &bcictl1); |
| 578 | if (ret) |
| 579 | return ret; |
| 580 | |
NeilBrown | 3b542f0 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 581 | return regval2ua(curr, bcictl1 & TWL4030_CGAIN); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 582 | } |
| 583 | |
| 584 | /* |
| 585 | * Returns the main charge FSM state |
| 586 | * Or < 0 on failure. |
| 587 | */ |
| 588 | static int twl4030bci_state(struct twl4030_bci *bci) |
| 589 | { |
| 590 | int ret; |
| 591 | u8 state; |
| 592 | |
| 593 | ret = twl4030_bci_read(TWL4030_BCIMSTATEC, &state); |
| 594 | if (ret) { |
| 595 | pr_err("twl4030_bci: error reading BCIMSTATEC\n"); |
| 596 | return ret; |
| 597 | } |
| 598 | |
| 599 | dev_dbg(bci->dev, "state: %02x\n", state); |
| 600 | |
| 601 | return state; |
| 602 | } |
| 603 | |
| 604 | static int twl4030_bci_state_to_status(int state) |
| 605 | { |
| 606 | state &= TWL4030_MSTATEC_MASK; |
| 607 | if (TWL4030_MSTATEC_QUICK1 <= state && state <= TWL4030_MSTATEC_QUICK7) |
| 608 | return POWER_SUPPLY_STATUS_CHARGING; |
| 609 | else if (TWL4030_MSTATEC_COMPLETE1 <= state && |
| 610 | state <= TWL4030_MSTATEC_COMPLETE4) |
| 611 | return POWER_SUPPLY_STATUS_FULL; |
| 612 | else |
| 613 | return POWER_SUPPLY_STATUS_NOT_CHARGING; |
| 614 | } |
| 615 | |
| 616 | static int twl4030_bci_get_property(struct power_supply *psy, |
| 617 | enum power_supply_property psp, |
| 618 | union power_supply_propval *val) |
| 619 | { |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 620 | struct twl4030_bci *bci = dev_get_drvdata(psy->dev.parent); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 621 | int is_charging; |
| 622 | int state; |
| 623 | int ret; |
| 624 | |
| 625 | state = twl4030bci_state(bci); |
| 626 | if (state < 0) |
| 627 | return state; |
| 628 | |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 629 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 630 | is_charging = state & TWL4030_MSTATEC_USB; |
| 631 | else |
| 632 | is_charging = state & TWL4030_MSTATEC_AC; |
| 633 | |
| 634 | switch (psp) { |
| 635 | case POWER_SUPPLY_PROP_STATUS: |
| 636 | if (is_charging) |
| 637 | val->intval = twl4030_bci_state_to_status(state); |
| 638 | else |
| 639 | val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; |
| 640 | break; |
| 641 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| 642 | /* charging must be active for meaningful result */ |
| 643 | if (!is_charging) |
| 644 | return -ENODATA; |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 645 | if (psy->desc->type == POWER_SUPPLY_TYPE_USB) { |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 646 | ret = twl4030bci_read_adc_val(TWL4030_BCIVBUS); |
| 647 | if (ret < 0) |
| 648 | return ret; |
| 649 | /* BCIVBUS uses ADCIN8, 7/1023 V/step */ |
| 650 | val->intval = ret * 6843; |
| 651 | } else { |
| 652 | ret = twl4030bci_read_adc_val(TWL4030_BCIVAC); |
| 653 | if (ret < 0) |
| 654 | return ret; |
| 655 | /* BCIVAC uses ADCIN11, 10/1023 V/step */ |
| 656 | val->intval = ret * 9775; |
| 657 | } |
| 658 | break; |
| 659 | case POWER_SUPPLY_PROP_CURRENT_NOW: |
| 660 | if (!is_charging) |
| 661 | return -ENODATA; |
| 662 | /* current measurement is shared between AC and USB */ |
| 663 | ret = twl4030_charger_get_current(); |
| 664 | if (ret < 0) |
| 665 | return ret; |
| 666 | val->intval = ret; |
| 667 | break; |
| 668 | case POWER_SUPPLY_PROP_ONLINE: |
| 669 | val->intval = is_charging && |
| 670 | twl4030_bci_state_to_status(state) != |
| 671 | POWER_SUPPLY_STATUS_NOT_CHARGING; |
| 672 | break; |
| 673 | default: |
| 674 | return -EINVAL; |
| 675 | } |
| 676 | |
| 677 | return 0; |
| 678 | } |
| 679 | |
| 680 | static enum power_supply_property twl4030_charger_props[] = { |
| 681 | POWER_SUPPLY_PROP_STATUS, |
| 682 | POWER_SUPPLY_PROP_ONLINE, |
| 683 | POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| 684 | POWER_SUPPLY_PROP_CURRENT_NOW, |
| 685 | }; |
| 686 | |
NeilBrown | ec0b380 | 2013-10-31 17:05:50 +1100 | [diff] [blame] | 687 | #ifdef CONFIG_OF |
| 688 | static const struct twl4030_bci_platform_data * |
| 689 | twl4030_bci_parse_dt(struct device *dev) |
| 690 | { |
| 691 | struct device_node *np = dev->of_node; |
| 692 | struct twl4030_bci_platform_data *pdata; |
| 693 | u32 num; |
| 694 | |
| 695 | if (!np) |
| 696 | return NULL; |
| 697 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
| 698 | if (!pdata) |
| 699 | return pdata; |
| 700 | |
| 701 | if (of_property_read_u32(np, "ti,bb-uvolt", &num) == 0) |
| 702 | pdata->bb_uvolt = num; |
| 703 | if (of_property_read_u32(np, "ti,bb-uamp", &num) == 0) |
| 704 | pdata->bb_uamp = num; |
| 705 | return pdata; |
| 706 | } |
| 707 | #else |
| 708 | static inline const struct twl4030_bci_platform_data * |
| 709 | twl4030_bci_parse_dt(struct device *dev) |
| 710 | { |
| 711 | return NULL; |
| 712 | } |
| 713 | #endif |
| 714 | |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 715 | static const struct power_supply_desc twl4030_bci_ac_desc = { |
| 716 | .name = "twl4030_ac", |
| 717 | .type = POWER_SUPPLY_TYPE_MAINS, |
| 718 | .properties = twl4030_charger_props, |
| 719 | .num_properties = ARRAY_SIZE(twl4030_charger_props), |
| 720 | .get_property = twl4030_bci_get_property, |
| 721 | }; |
| 722 | |
| 723 | static const struct power_supply_desc twl4030_bci_usb_desc = { |
| 724 | .name = "twl4030_usb", |
| 725 | .type = POWER_SUPPLY_TYPE_USB, |
| 726 | .properties = twl4030_charger_props, |
| 727 | .num_properties = ARRAY_SIZE(twl4030_charger_props), |
| 728 | .get_property = twl4030_bci_get_property, |
| 729 | }; |
| 730 | |
Pavel Machek | 7396f70 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 731 | static int twl4030_bci_probe(struct platform_device *pdev) |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 732 | { |
| 733 | struct twl4030_bci *bci; |
NeilBrown | ec0b380 | 2013-10-31 17:05:50 +1100 | [diff] [blame] | 734 | const struct twl4030_bci_platform_data *pdata = pdev->dev.platform_data; |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 735 | int ret; |
Grazvydas Ignotas | 28d48f0 | 2011-06-03 14:43:11 +0300 | [diff] [blame] | 736 | u32 reg; |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 737 | |
NeilBrown | 325b50a | 2015-03-23 10:20:28 +1100 | [diff] [blame] | 738 | bci = devm_kzalloc(&pdev->dev, sizeof(*bci), GFP_KERNEL); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 739 | if (bci == NULL) |
| 740 | return -ENOMEM; |
| 741 | |
NeilBrown | ec0b380 | 2013-10-31 17:05:50 +1100 | [diff] [blame] | 742 | if (!pdata) |
| 743 | pdata = twl4030_bci_parse_dt(&pdev->dev); |
| 744 | |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 745 | bci->ichg_eoc = 80100; /* Stop charging when current drops to here */ |
| 746 | bci->ichg_lo = 241000; /* Low threshold */ |
| 747 | bci->ichg_hi = 500000; /* High threshold */ |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 748 | bci->ac_cur = 500000; /* 500mA */ |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 749 | if (allow_usb) |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 750 | bci->usb_cur = 500000; /* 500mA */ |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 751 | else |
NeilBrown | e4ae537 | 2015-07-30 10:11:24 +1000 | [diff] [blame^] | 752 | bci->usb_cur = 100000; /* 100mA */ |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 753 | |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 754 | bci->dev = &pdev->dev; |
| 755 | bci->irq_chg = platform_get_irq(pdev, 0); |
| 756 | bci->irq_bci = platform_get_irq(pdev, 1); |
| 757 | |
Nishanth Menon | 61a7784 | 2014-05-28 16:46:49 -0500 | [diff] [blame] | 758 | /* Only proceed further *IF* battery is physically present */ |
| 759 | ret = twl4030_is_battery_present(bci); |
| 760 | if (ret) { |
| 761 | dev_crit(&pdev->dev, "Battery was not detected:%d\n", ret); |
NeilBrown | 325b50a | 2015-03-23 10:20:28 +1100 | [diff] [blame] | 762 | return ret; |
Nishanth Menon | 61a7784 | 2014-05-28 16:46:49 -0500 | [diff] [blame] | 763 | } |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 764 | |
Nishanth Menon | 61a7784 | 2014-05-28 16:46:49 -0500 | [diff] [blame] | 765 | platform_set_drvdata(pdev, bci); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 766 | |
NeilBrown | 325b50a | 2015-03-23 10:20:28 +1100 | [diff] [blame] | 767 | bci->ac = devm_power_supply_register(&pdev->dev, &twl4030_bci_ac_desc, |
| 768 | NULL); |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 769 | if (IS_ERR(bci->ac)) { |
| 770 | ret = PTR_ERR(bci->ac); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 771 | dev_err(&pdev->dev, "failed to register ac: %d\n", ret); |
NeilBrown | 325b50a | 2015-03-23 10:20:28 +1100 | [diff] [blame] | 772 | return ret; |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 773 | } |
| 774 | |
NeilBrown | 325b50a | 2015-03-23 10:20:28 +1100 | [diff] [blame] | 775 | bci->usb = devm_power_supply_register(&pdev->dev, &twl4030_bci_usb_desc, |
| 776 | NULL); |
Krzysztof Kozlowski | 297d716 | 2015-03-12 08:44:11 +0100 | [diff] [blame] | 777 | if (IS_ERR(bci->usb)) { |
| 778 | ret = PTR_ERR(bci->usb); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 779 | dev_err(&pdev->dev, "failed to register usb: %d\n", ret); |
NeilBrown | 325b50a | 2015-03-23 10:20:28 +1100 | [diff] [blame] | 780 | return ret; |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 781 | } |
| 782 | |
NeilBrown | 1b7cac2 | 2015-03-23 10:20:28 +1100 | [diff] [blame] | 783 | ret = devm_request_threaded_irq(&pdev->dev, bci->irq_chg, NULL, |
Fengguang Wu | a2778b0 | 2012-08-23 19:56:43 +0800 | [diff] [blame] | 784 | twl4030_charger_interrupt, IRQF_ONESHOT, pdev->name, |
| 785 | bci); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 786 | if (ret < 0) { |
| 787 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", |
| 788 | bci->irq_chg, ret); |
NeilBrown | 325b50a | 2015-03-23 10:20:28 +1100 | [diff] [blame] | 789 | return ret; |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 790 | } |
| 791 | |
NeilBrown | 1b7cac2 | 2015-03-23 10:20:28 +1100 | [diff] [blame] | 792 | ret = devm_request_threaded_irq(&pdev->dev, bci->irq_bci, NULL, |
Fengguang Wu | a2778b0 | 2012-08-23 19:56:43 +0800 | [diff] [blame] | 793 | twl4030_bci_interrupt, IRQF_ONESHOT, pdev->name, bci); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 794 | if (ret < 0) { |
| 795 | dev_err(&pdev->dev, "could not request irq %d, status %d\n", |
| 796 | bci->irq_bci, ret); |
NeilBrown | 325b50a | 2015-03-23 10:20:28 +1100 | [diff] [blame] | 797 | return ret; |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 798 | } |
| 799 | |
Heikki Krogerus | d6ccc44 | 2011-02-25 13:56:36 +0200 | [diff] [blame] | 800 | INIT_WORK(&bci->work, twl4030_bci_usb_work); |
| 801 | |
NeilBrown | f5e4edb | 2015-03-23 09:52:48 +1100 | [diff] [blame] | 802 | bci->usb_nb.notifier_call = twl4030_bci_usb_ncb; |
| 803 | if (bci->dev->of_node) { |
| 804 | struct device_node *phynode; |
| 805 | |
| 806 | phynode = of_find_compatible_node(bci->dev->of_node->parent, |
| 807 | NULL, "ti,twl4030-usb"); |
NeilBrown | 3fc3895 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 808 | if (phynode) { |
NeilBrown | f5e4edb | 2015-03-23 09:52:48 +1100 | [diff] [blame] | 809 | bci->transceiver = devm_usb_get_phy_by_node( |
| 810 | bci->dev, phynode, &bci->usb_nb); |
NeilBrown | 3fc3895 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 811 | if (IS_ERR(bci->transceiver) && |
| 812 | PTR_ERR(bci->transceiver) == -EPROBE_DEFER) |
| 813 | return -EPROBE_DEFER; |
| 814 | } |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 815 | } |
| 816 | |
| 817 | /* Enable interrupts now. */ |
Grazvydas Ignotas | 28d48f0 | 2011-06-03 14:43:11 +0300 | [diff] [blame] | 818 | reg = ~(u32)(TWL4030_ICHGLOW | TWL4030_ICHGEOC | TWL4030_TBATOR2 | |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 819 | TWL4030_TBATOR1 | TWL4030_BATSTS); |
| 820 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, |
| 821 | TWL4030_INTERRUPTS_BCIIMR1A); |
| 822 | if (ret < 0) { |
| 823 | dev_err(&pdev->dev, "failed to unmask interrupts: %d\n", ret); |
NeilBrown | 325b50a | 2015-03-23 10:20:28 +1100 | [diff] [blame] | 824 | return ret; |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 825 | } |
| 826 | |
Grazvydas Ignotas | 28d48f0 | 2011-06-03 14:43:11 +0300 | [diff] [blame] | 827 | reg = ~(u32)(TWL4030_VBATOV | TWL4030_VBUSOV | TWL4030_ACCHGOV); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 828 | ret = twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, reg, |
| 829 | TWL4030_INTERRUPTS_BCIIMR2A); |
| 830 | if (ret < 0) |
| 831 | dev_warn(&pdev->dev, "failed to unmask interrupts: %d\n", ret); |
| 832 | |
NeilBrown | 1098cb5 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 833 | twl4030_charger_update_current(bci); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 834 | twl4030_charger_enable_ac(true); |
NeilBrown | 6e37ec8 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 835 | if (!IS_ERR_OR_NULL(bci->transceiver)) |
| 836 | twl4030_bci_usb_ncb(&bci->usb_nb, |
| 837 | bci->transceiver->last_event, |
| 838 | NULL); |
| 839 | else |
| 840 | twl4030_charger_enable_usb(bci, false); |
NeilBrown | ec0b380 | 2013-10-31 17:05:50 +1100 | [diff] [blame] | 841 | if (pdata) |
| 842 | twl4030_charger_enable_backup(pdata->bb_uvolt, |
| 843 | pdata->bb_uamp); |
| 844 | else |
| 845 | twl4030_charger_enable_backup(0, 0); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 846 | |
| 847 | return 0; |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 848 | } |
| 849 | |
| 850 | static int __exit twl4030_bci_remove(struct platform_device *pdev) |
| 851 | { |
| 852 | struct twl4030_bci *bci = platform_get_drvdata(pdev); |
| 853 | |
| 854 | twl4030_charger_enable_ac(false); |
| 855 | twl4030_charger_enable_usb(bci, false); |
NeilBrown | 210d4bc | 2012-05-09 07:40:40 +1000 | [diff] [blame] | 856 | twl4030_charger_enable_backup(0, 0); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 857 | |
| 858 | /* mask interrupts */ |
| 859 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, |
| 860 | TWL4030_INTERRUPTS_BCIIMR1A); |
| 861 | twl_i2c_write_u8(TWL4030_MODULE_INTERRUPTS, 0xff, |
| 862 | TWL4030_INTERRUPTS_BCIIMR2A); |
| 863 | |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 864 | return 0; |
| 865 | } |
| 866 | |
NeilBrown | ec0b380 | 2013-10-31 17:05:50 +1100 | [diff] [blame] | 867 | static const struct of_device_id twl_bci_of_match[] = { |
| 868 | {.compatible = "ti,twl4030-bci", }, |
| 869 | { } |
| 870 | }; |
| 871 | MODULE_DEVICE_TABLE(of, twl_bci_of_match); |
| 872 | |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 873 | static struct platform_driver twl4030_bci_driver = { |
Pavel Machek | 7396f70 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 874 | .probe = twl4030_bci_probe, |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 875 | .driver = { |
| 876 | .name = "twl4030_bci", |
NeilBrown | ec0b380 | 2013-10-31 17:05:50 +1100 | [diff] [blame] | 877 | .of_match_table = of_match_ptr(twl_bci_of_match), |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 878 | }, |
| 879 | .remove = __exit_p(twl4030_bci_remove), |
| 880 | }; |
Pavel Machek | 7396f70 | 2015-07-30 10:11:24 +1000 | [diff] [blame] | 881 | module_platform_driver(twl4030_bci_driver); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 882 | |
Grazvydas Ignotas | 28d48f0 | 2011-06-03 14:43:11 +0300 | [diff] [blame] | 883 | MODULE_AUTHOR("Gražvydas Ignotas"); |
Grazvydas Ignotas | 2e727f1 | 2010-09-27 23:18:24 +0300 | [diff] [blame] | 884 | MODULE_DESCRIPTION("TWL4030 Battery Charger Interface driver"); |
| 885 | MODULE_LICENSE("GPL"); |
| 886 | MODULE_ALIAS("platform:twl4030_bci"); |