| 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * MFD driver for TWL6040 audio device |
| 4 | * |
| 5 | * Authors: Misael Lopez Cruz <misael.lopez@ti.com> |
| 6 | * Jorge Eduardo Candelaria <jorge.candelaria@ti.com> |
| 7 | * Peter Ujfalusi <peter.ujfalusi@ti.com> |
| 8 | * |
| 9 | * Copyright: (C) 2011 Texas Instruments, Inc. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/types.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/err.h> |
| 17 | #include <linux/platform_device.h> |
| 18 | #include <linux/of.h> |
| 19 | #include <linux/gpio/consumer.h> |
| 20 | #include <linux/delay.h> |
| 21 | #include <linux/i2c.h> |
| 22 | #include <linux/regmap.h> |
| 23 | #include <linux/mfd/core.h> |
| 24 | #include <linux/mfd/twl6040.h> |
| 25 | #include <linux/regulator/consumer.h> |
| 26 | |
| 27 | #define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1) |
| 28 | #define TWL6040_NUM_SUPPLIES (2) |
| 29 | |
| 30 | static const struct reg_default twl6040_defaults[] = { |
| 31 | { 0x01, 0x4B }, /* REG_ASICID (ro) */ |
| 32 | { 0x02, 0x00 }, /* REG_ASICREV (ro) */ |
| 33 | { 0x03, 0x00 }, /* REG_INTID */ |
| 34 | { 0x04, 0x00 }, /* REG_INTMR */ |
| 35 | { 0x05, 0x00 }, /* REG_NCPCTRL */ |
| 36 | { 0x06, 0x00 }, /* REG_LDOCTL */ |
| 37 | { 0x07, 0x60 }, /* REG_HPPLLCTL */ |
| 38 | { 0x08, 0x00 }, /* REG_LPPLLCTL */ |
| 39 | { 0x09, 0x4A }, /* REG_LPPLLDIV */ |
| 40 | { 0x0A, 0x00 }, /* REG_AMICBCTL */ |
| 41 | { 0x0B, 0x00 }, /* REG_DMICBCTL */ |
| 42 | { 0x0C, 0x00 }, /* REG_MICLCTL */ |
| 43 | { 0x0D, 0x00 }, /* REG_MICRCTL */ |
| 44 | { 0x0E, 0x00 }, /* REG_MICGAIN */ |
| 45 | { 0x0F, 0x1B }, /* REG_LINEGAIN */ |
| 46 | { 0x10, 0x00 }, /* REG_HSLCTL */ |
| 47 | { 0x11, 0x00 }, /* REG_HSRCTL */ |
| 48 | { 0x12, 0x00 }, /* REG_HSGAIN */ |
| 49 | { 0x13, 0x00 }, /* REG_EARCTL */ |
| 50 | { 0x14, 0x00 }, /* REG_HFLCTL */ |
| 51 | { 0x15, 0x00 }, /* REG_HFLGAIN */ |
| 52 | { 0x16, 0x00 }, /* REG_HFRCTL */ |
| 53 | { 0x17, 0x00 }, /* REG_HFRGAIN */ |
| 54 | { 0x18, 0x00 }, /* REG_VIBCTLL */ |
| 55 | { 0x19, 0x00 }, /* REG_VIBDATL */ |
| 56 | { 0x1A, 0x00 }, /* REG_VIBCTLR */ |
| 57 | { 0x1B, 0x00 }, /* REG_VIBDATR */ |
| 58 | { 0x1C, 0x00 }, /* REG_HKCTL1 */ |
| 59 | { 0x1D, 0x00 }, /* REG_HKCTL2 */ |
| 60 | { 0x1E, 0x00 }, /* REG_GPOCTL */ |
| 61 | { 0x1F, 0x00 }, /* REG_ALB */ |
| 62 | { 0x20, 0x00 }, /* REG_DLB */ |
| 63 | /* 0x28, REG_TRIM1 */ |
| 64 | /* 0x29, REG_TRIM2 */ |
| 65 | /* 0x2A, REG_TRIM3 */ |
| 66 | /* 0x2B, REG_HSOTRIM */ |
| 67 | /* 0x2C, REG_HFOTRIM */ |
| 68 | { 0x2D, 0x08 }, /* REG_ACCCTL */ |
| 69 | { 0x2E, 0x00 }, /* REG_STATUS (ro) */ |
| 70 | }; |
| 71 | |
| 72 | static struct reg_sequence twl6040_patch[] = { |
| 73 | /* |
| 74 | * Select I2C bus access to dual access registers |
| 75 | * Interrupt register is cleared on read |
| 76 | * Select fast mode for i2c (400KHz) |
| 77 | */ |
| 78 | { TWL6040_REG_ACCCTL, |
| 79 | TWL6040_I2CSEL | TWL6040_INTCLRMODE | TWL6040_I2CMODE(1) }, |
| 80 | }; |
| 81 | |
| 82 | |
| 83 | static bool twl6040_has_vibra(struct device_node *parent) |
| 84 | { |
| 85 | struct device_node *node; |
| 86 | |
| 87 | node = of_get_child_by_name(parent, "vibra"); |
| 88 | if (node) { |
| 89 | of_node_put(node); |
| 90 | return true; |
| 91 | } |
| 92 | |
| 93 | return false; |
| 94 | } |
| 95 | |
| 96 | int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg) |
| 97 | { |
| 98 | int ret; |
| 99 | unsigned int val; |
| 100 | |
| 101 | ret = regmap_read(twl6040->regmap, reg, &val); |
| 102 | if (ret < 0) |
| 103 | return ret; |
| 104 | |
| 105 | return val; |
| 106 | } |
| 107 | EXPORT_SYMBOL(twl6040_reg_read); |
| 108 | |
| 109 | int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val) |
| 110 | { |
| 111 | int ret; |
| 112 | |
| 113 | ret = regmap_write(twl6040->regmap, reg, val); |
| 114 | |
| 115 | return ret; |
| 116 | } |
| 117 | EXPORT_SYMBOL(twl6040_reg_write); |
| 118 | |
| 119 | int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask) |
| 120 | { |
| 121 | return regmap_update_bits(twl6040->regmap, reg, mask, mask); |
| 122 | } |
| 123 | EXPORT_SYMBOL(twl6040_set_bits); |
| 124 | |
| 125 | int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask) |
| 126 | { |
| 127 | return regmap_update_bits(twl6040->regmap, reg, mask, 0); |
| 128 | } |
| 129 | EXPORT_SYMBOL(twl6040_clear_bits); |
| 130 | |
| 131 | /* twl6040 codec manual power-up sequence */ |
| 132 | static int twl6040_power_up_manual(struct twl6040 *twl6040) |
| 133 | { |
| 134 | u8 ldoctl, ncpctl, lppllctl; |
| 135 | int ret; |
| 136 | |
| 137 | /* enable high-side LDO, reference system and internal oscillator */ |
| 138 | ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA; |
| 139 | ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); |
| 140 | if (ret) |
| 141 | return ret; |
| 142 | usleep_range(10000, 10500); |
| 143 | |
| 144 | /* enable negative charge pump */ |
| 145 | ncpctl = TWL6040_NCPENA; |
| 146 | ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl); |
| 147 | if (ret) |
| 148 | goto ncp_err; |
| 149 | usleep_range(1000, 1500); |
| 150 | |
| 151 | /* enable low-side LDO */ |
| 152 | ldoctl |= TWL6040_LSLDOENA; |
| 153 | ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); |
| 154 | if (ret) |
| 155 | goto lsldo_err; |
| 156 | usleep_range(1000, 1500); |
| 157 | |
| 158 | /* enable low-power PLL */ |
| 159 | lppllctl = TWL6040_LPLLENA; |
| 160 | ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); |
| 161 | if (ret) |
| 162 | goto lppll_err; |
| 163 | usleep_range(5000, 5500); |
| 164 | |
| 165 | /* disable internal oscillator */ |
| 166 | ldoctl &= ~TWL6040_OSCENA; |
| 167 | ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); |
| 168 | if (ret) |
| 169 | goto osc_err; |
| 170 | |
| 171 | return 0; |
| 172 | |
| 173 | osc_err: |
| 174 | lppllctl &= ~TWL6040_LPLLENA; |
| 175 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); |
| 176 | lppll_err: |
| 177 | ldoctl &= ~TWL6040_LSLDOENA; |
| 178 | twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); |
| 179 | lsldo_err: |
| 180 | ncpctl &= ~TWL6040_NCPENA; |
| 181 | twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl); |
| 182 | ncp_err: |
| 183 | ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA); |
| 184 | twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); |
| 185 | |
| 186 | dev_err(twl6040->dev, "manual power-up failed\n"); |
| 187 | return ret; |
| 188 | } |
| 189 | |
| 190 | /* twl6040 manual power-down sequence */ |
| 191 | static void twl6040_power_down_manual(struct twl6040 *twl6040) |
| 192 | { |
| 193 | u8 ncpctl, ldoctl, lppllctl; |
| 194 | |
| 195 | ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL); |
| 196 | ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL); |
| 197 | lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL); |
| 198 | |
| 199 | /* enable internal oscillator */ |
| 200 | ldoctl |= TWL6040_OSCENA; |
| 201 | twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); |
| 202 | usleep_range(1000, 1500); |
| 203 | |
| 204 | /* disable low-power PLL */ |
| 205 | lppllctl &= ~TWL6040_LPLLENA; |
| 206 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl); |
| 207 | |
| 208 | /* disable low-side LDO */ |
| 209 | ldoctl &= ~TWL6040_LSLDOENA; |
| 210 | twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); |
| 211 | |
| 212 | /* disable negative charge pump */ |
| 213 | ncpctl &= ~TWL6040_NCPENA; |
| 214 | twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl); |
| 215 | |
| 216 | /* disable high-side LDO, reference system and internal oscillator */ |
| 217 | ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA); |
| 218 | twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl); |
| 219 | } |
| 220 | |
| 221 | static irqreturn_t twl6040_readyint_handler(int irq, void *data) |
| 222 | { |
| 223 | struct twl6040 *twl6040 = data; |
| 224 | |
| 225 | complete(&twl6040->ready); |
| 226 | |
| 227 | return IRQ_HANDLED; |
| 228 | } |
| 229 | |
| 230 | static irqreturn_t twl6040_thint_handler(int irq, void *data) |
| 231 | { |
| 232 | struct twl6040 *twl6040 = data; |
| 233 | u8 status; |
| 234 | |
| 235 | status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS); |
| 236 | if (status & TWL6040_TSHUTDET) { |
| 237 | dev_warn(twl6040->dev, "Thermal shutdown, powering-off"); |
| 238 | twl6040_power(twl6040, 0); |
| 239 | } else { |
| 240 | dev_warn(twl6040->dev, "Leaving thermal shutdown, powering-on"); |
| 241 | twl6040_power(twl6040, 1); |
| 242 | } |
| 243 | |
| 244 | return IRQ_HANDLED; |
| 245 | } |
| 246 | |
| 247 | static int twl6040_power_up_automatic(struct twl6040 *twl6040) |
| 248 | { |
| 249 | int time_left; |
| 250 | |
| 251 | gpiod_set_value_cansleep(twl6040->audpwron, 1); |
| 252 | |
| 253 | time_left = wait_for_completion_timeout(&twl6040->ready, |
| 254 | msecs_to_jiffies(144)); |
| 255 | if (!time_left) { |
| 256 | u8 intid; |
| 257 | |
| 258 | dev_warn(twl6040->dev, "timeout waiting for READYINT\n"); |
| 259 | intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID); |
| 260 | if (!(intid & TWL6040_READYINT)) { |
| 261 | dev_err(twl6040->dev, "automatic power-up failed\n"); |
| 262 | gpiod_set_value_cansleep(twl6040->audpwron, 0); |
| 263 | return -ETIMEDOUT; |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | return 0; |
| 268 | } |
| 269 | |
| 270 | int twl6040_power(struct twl6040 *twl6040, int on) |
| 271 | { |
| 272 | int ret = 0; |
| 273 | |
| 274 | mutex_lock(&twl6040->mutex); |
| 275 | |
| 276 | if (on) { |
| 277 | /* already powered-up */ |
| 278 | if (twl6040->power_count++) |
| 279 | goto out; |
| 280 | |
| 281 | ret = clk_prepare_enable(twl6040->clk32k); |
| 282 | if (ret) { |
| 283 | twl6040->power_count = 0; |
| 284 | goto out; |
| 285 | } |
| 286 | |
| 287 | /* Allow writes to the chip */ |
| 288 | regcache_cache_only(twl6040->regmap, false); |
| 289 | |
| 290 | if (twl6040->audpwron) { |
| 291 | /* use automatic power-up sequence */ |
| 292 | ret = twl6040_power_up_automatic(twl6040); |
| 293 | if (ret) { |
| 294 | clk_disable_unprepare(twl6040->clk32k); |
| 295 | twl6040->power_count = 0; |
| 296 | goto out; |
| 297 | } |
| 298 | } else { |
| 299 | /* use manual power-up sequence */ |
| 300 | ret = twl6040_power_up_manual(twl6040); |
| 301 | if (ret) { |
| 302 | clk_disable_unprepare(twl6040->clk32k); |
| 303 | twl6040->power_count = 0; |
| 304 | goto out; |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | /* |
| 309 | * Register access can produce errors after power-up unless we |
| 310 | * wait at least 8ms based on measurements on duovero. |
| 311 | */ |
| 312 | usleep_range(10000, 12000); |
| 313 | |
| 314 | /* Sync with the HW */ |
| 315 | ret = regcache_sync(twl6040->regmap); |
| 316 | if (ret) { |
| 317 | dev_err(twl6040->dev, "Failed to sync with the HW: %i\n", |
| 318 | ret); |
| 319 | goto out; |
| 320 | } |
| 321 | |
| 322 | /* Default PLL configuration after power up */ |
| 323 | twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL; |
| 324 | twl6040->sysclk_rate = 19200000; |
| 325 | } else { |
| 326 | /* already powered-down */ |
| 327 | if (!twl6040->power_count) { |
| 328 | dev_err(twl6040->dev, |
| 329 | "device is already powered-off\n"); |
| 330 | ret = -EPERM; |
| 331 | goto out; |
| 332 | } |
| 333 | |
| 334 | if (--twl6040->power_count) |
| 335 | goto out; |
| 336 | |
| 337 | if (twl6040->audpwron) { |
| 338 | /* use AUDPWRON line */ |
| 339 | gpiod_set_value_cansleep(twl6040->audpwron, 0); |
| 340 | |
| 341 | /* power-down sequence latency */ |
| 342 | usleep_range(500, 700); |
| 343 | } else { |
| 344 | /* use manual power-down sequence */ |
| 345 | twl6040_power_down_manual(twl6040); |
| 346 | } |
| 347 | |
| 348 | /* Set regmap to cache only and mark it as dirty */ |
| 349 | regcache_cache_only(twl6040->regmap, true); |
| 350 | regcache_mark_dirty(twl6040->regmap); |
| 351 | |
| 352 | twl6040->sysclk_rate = 0; |
| 353 | |
| 354 | if (twl6040->pll == TWL6040_SYSCLK_SEL_HPPLL) { |
| 355 | clk_disable_unprepare(twl6040->mclk); |
| 356 | twl6040->mclk_rate = 0; |
| 357 | } |
| 358 | |
| 359 | clk_disable_unprepare(twl6040->clk32k); |
| 360 | } |
| 361 | |
| 362 | out: |
| 363 | mutex_unlock(&twl6040->mutex); |
| 364 | return ret; |
| 365 | } |
| 366 | EXPORT_SYMBOL(twl6040_power); |
| 367 | |
| 368 | int twl6040_set_pll(struct twl6040 *twl6040, int pll_id, |
| 369 | unsigned int freq_in, unsigned int freq_out) |
| 370 | { |
| 371 | u8 hppllctl, lppllctl; |
| 372 | int ret = 0; |
| 373 | |
| 374 | mutex_lock(&twl6040->mutex); |
| 375 | |
| 376 | hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL); |
| 377 | lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL); |
| 378 | |
| 379 | /* Force full reconfiguration when switching between PLL */ |
| 380 | if (pll_id != twl6040->pll) { |
| 381 | twl6040->sysclk_rate = 0; |
| 382 | twl6040->mclk_rate = 0; |
| 383 | } |
| 384 | |
| 385 | switch (pll_id) { |
| 386 | case TWL6040_SYSCLK_SEL_LPPLL: |
| 387 | /* low-power PLL divider */ |
| 388 | /* Change the sysclk configuration only if it has been canged */ |
| 389 | if (twl6040->sysclk_rate != freq_out) { |
| 390 | switch (freq_out) { |
| 391 | case 17640000: |
| 392 | lppllctl |= TWL6040_LPLLFIN; |
| 393 | break; |
| 394 | case 19200000: |
| 395 | lppllctl &= ~TWL6040_LPLLFIN; |
| 396 | break; |
| 397 | default: |
| 398 | dev_err(twl6040->dev, |
| 399 | "freq_out %d not supported\n", |
| 400 | freq_out); |
| 401 | ret = -EINVAL; |
| 402 | goto pll_out; |
| 403 | } |
| 404 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, |
| 405 | lppllctl); |
| 406 | } |
| 407 | |
| 408 | /* The PLL in use has not been change, we can exit */ |
| 409 | if (twl6040->pll == pll_id) |
| 410 | break; |
| 411 | |
| 412 | switch (freq_in) { |
| 413 | case 32768: |
| 414 | lppllctl |= TWL6040_LPLLENA; |
| 415 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, |
| 416 | lppllctl); |
| 417 | mdelay(5); |
| 418 | lppllctl &= ~TWL6040_HPLLSEL; |
| 419 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, |
| 420 | lppllctl); |
| 421 | hppllctl &= ~TWL6040_HPLLENA; |
| 422 | twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, |
| 423 | hppllctl); |
| 424 | break; |
| 425 | default: |
| 426 | dev_err(twl6040->dev, |
| 427 | "freq_in %d not supported\n", freq_in); |
| 428 | ret = -EINVAL; |
| 429 | goto pll_out; |
| 430 | } |
| 431 | |
| 432 | clk_disable_unprepare(twl6040->mclk); |
| 433 | break; |
| 434 | case TWL6040_SYSCLK_SEL_HPPLL: |
| 435 | /* high-performance PLL can provide only 19.2 MHz */ |
| 436 | if (freq_out != 19200000) { |
| 437 | dev_err(twl6040->dev, |
| 438 | "freq_out %d not supported\n", freq_out); |
| 439 | ret = -EINVAL; |
| 440 | goto pll_out; |
| 441 | } |
| 442 | |
| 443 | if (twl6040->mclk_rate != freq_in) { |
| 444 | hppllctl &= ~TWL6040_MCLK_MSK; |
| 445 | |
| 446 | switch (freq_in) { |
| 447 | case 12000000: |
| 448 | /* PLL enabled, active mode */ |
| 449 | hppllctl |= TWL6040_MCLK_12000KHZ | |
| 450 | TWL6040_HPLLENA; |
| 451 | break; |
| 452 | case 19200000: |
| 453 | /* PLL enabled, bypass mode */ |
| 454 | hppllctl |= TWL6040_MCLK_19200KHZ | |
| 455 | TWL6040_HPLLBP | TWL6040_HPLLENA; |
| 456 | break; |
| 457 | case 26000000: |
| 458 | /* PLL enabled, active mode */ |
| 459 | hppllctl |= TWL6040_MCLK_26000KHZ | |
| 460 | TWL6040_HPLLENA; |
| 461 | break; |
| 462 | case 38400000: |
| 463 | /* PLL enabled, bypass mode */ |
| 464 | hppllctl |= TWL6040_MCLK_38400KHZ | |
| 465 | TWL6040_HPLLBP | TWL6040_HPLLENA; |
| 466 | break; |
| 467 | default: |
| 468 | dev_err(twl6040->dev, |
| 469 | "freq_in %d not supported\n", freq_in); |
| 470 | ret = -EINVAL; |
| 471 | goto pll_out; |
| 472 | } |
| 473 | |
| 474 | /* When switching to HPPLL, enable the mclk first */ |
| 475 | if (pll_id != twl6040->pll) |
| 476 | clk_prepare_enable(twl6040->mclk); |
| 477 | /* |
| 478 | * enable clock slicer to ensure input waveform is |
| 479 | * square |
| 480 | */ |
| 481 | hppllctl |= TWL6040_HPLLSQRENA; |
| 482 | |
| 483 | twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, |
| 484 | hppllctl); |
| 485 | usleep_range(500, 700); |
| 486 | lppllctl |= TWL6040_HPLLSEL; |
| 487 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, |
| 488 | lppllctl); |
| 489 | lppllctl &= ~TWL6040_LPLLENA; |
| 490 | twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, |
| 491 | lppllctl); |
| 492 | |
| 493 | twl6040->mclk_rate = freq_in; |
| 494 | } |
| 495 | break; |
| 496 | default: |
| 497 | dev_err(twl6040->dev, "unknown pll id %d\n", pll_id); |
| 498 | ret = -EINVAL; |
| 499 | goto pll_out; |
| 500 | } |
| 501 | |
| 502 | twl6040->sysclk_rate = freq_out; |
| 503 | twl6040->pll = pll_id; |
| 504 | |
| 505 | pll_out: |
| 506 | mutex_unlock(&twl6040->mutex); |
| 507 | return ret; |
| 508 | } |
| 509 | EXPORT_SYMBOL(twl6040_set_pll); |
| 510 | |
| 511 | int twl6040_get_pll(struct twl6040 *twl6040) |
| 512 | { |
| 513 | if (twl6040->power_count) |
| 514 | return twl6040->pll; |
| 515 | else |
| 516 | return -ENODEV; |
| 517 | } |
| 518 | EXPORT_SYMBOL(twl6040_get_pll); |
| 519 | |
| 520 | unsigned int twl6040_get_sysclk(struct twl6040 *twl6040) |
| 521 | { |
| 522 | return twl6040->sysclk_rate; |
| 523 | } |
| 524 | EXPORT_SYMBOL(twl6040_get_sysclk); |
| 525 | |
| 526 | /* Get the combined status of the vibra control register */ |
| 527 | int twl6040_get_vibralr_status(struct twl6040 *twl6040) |
| 528 | { |
| 529 | unsigned int reg; |
| 530 | int ret; |
| 531 | u8 status; |
| 532 | |
| 533 | ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLL, ®); |
| 534 | if (ret != 0) |
| 535 | return ret; |
| 536 | status = reg; |
| 537 | |
| 538 | ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLR, ®); |
| 539 | if (ret != 0) |
| 540 | return ret; |
| 541 | status |= reg; |
| 542 | |
| 543 | status &= (TWL6040_VIBENA | TWL6040_VIBSEL); |
| 544 | |
| 545 | return status; |
| 546 | } |
| 547 | EXPORT_SYMBOL(twl6040_get_vibralr_status); |
| 548 | |
| 549 | static struct resource twl6040_vibra_rsrc[] = { |
| 550 | { |
| 551 | .flags = IORESOURCE_IRQ, |
| 552 | }, |
| 553 | }; |
| 554 | |
| 555 | static struct resource twl6040_codec_rsrc[] = { |
| 556 | { |
| 557 | .flags = IORESOURCE_IRQ, |
| 558 | }, |
| 559 | }; |
| 560 | |
| 561 | static bool twl6040_readable_reg(struct device *dev, unsigned int reg) |
| 562 | { |
| 563 | /* Register 0 is not readable */ |
| 564 | if (!reg) |
| 565 | return false; |
| 566 | return true; |
| 567 | } |
| 568 | |
| 569 | static bool twl6040_volatile_reg(struct device *dev, unsigned int reg) |
| 570 | { |
| 571 | switch (reg) { |
| 572 | case TWL6040_REG_ASICID: |
| 573 | case TWL6040_REG_ASICREV: |
| 574 | case TWL6040_REG_INTID: |
| 575 | case TWL6040_REG_LPPLLCTL: |
| 576 | case TWL6040_REG_HPPLLCTL: |
| 577 | case TWL6040_REG_STATUS: |
| 578 | return true; |
| 579 | default: |
| 580 | return false; |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | static bool twl6040_writeable_reg(struct device *dev, unsigned int reg) |
| 585 | { |
| 586 | switch (reg) { |
| 587 | case TWL6040_REG_ASICID: |
| 588 | case TWL6040_REG_ASICREV: |
| 589 | case TWL6040_REG_STATUS: |
| 590 | return false; |
| 591 | default: |
| 592 | return true; |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | static const struct regmap_config twl6040_regmap_config = { |
| 597 | .reg_bits = 8, |
| 598 | .val_bits = 8, |
| 599 | |
| 600 | .reg_defaults = twl6040_defaults, |
| 601 | .num_reg_defaults = ARRAY_SIZE(twl6040_defaults), |
| 602 | |
| 603 | .max_register = TWL6040_REG_STATUS, /* 0x2e */ |
| 604 | |
| 605 | .readable_reg = twl6040_readable_reg, |
| 606 | .volatile_reg = twl6040_volatile_reg, |
| 607 | .writeable_reg = twl6040_writeable_reg, |
| 608 | |
| 609 | .cache_type = REGCACHE_MAPLE, |
| 610 | .use_single_read = true, |
| 611 | .use_single_write = true, |
| 612 | }; |
| 613 | |
| 614 | static const struct regmap_irq twl6040_irqs[] = { |
| 615 | { .reg_offset = 0, .mask = TWL6040_THINT, }, |
| 616 | { .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, }, |
| 617 | { .reg_offset = 0, .mask = TWL6040_HOOKINT, }, |
| 618 | { .reg_offset = 0, .mask = TWL6040_HFINT, }, |
| 619 | { .reg_offset = 0, .mask = TWL6040_VIBINT, }, |
| 620 | { .reg_offset = 0, .mask = TWL6040_READYINT, }, |
| 621 | }; |
| 622 | |
| 623 | static struct regmap_irq_chip twl6040_irq_chip = { |
| 624 | .name = "twl6040", |
| 625 | .irqs = twl6040_irqs, |
| 626 | .num_irqs = ARRAY_SIZE(twl6040_irqs), |
| 627 | |
| 628 | .num_regs = 1, |
| 629 | .status_base = TWL6040_REG_INTID, |
| 630 | .mask_base = TWL6040_REG_INTMR, |
| 631 | }; |
| 632 | |
| 633 | static int twl6040_probe(struct i2c_client *client) |
| 634 | { |
| 635 | struct device_node *node = client->dev.of_node; |
| 636 | struct twl6040 *twl6040; |
| 637 | struct mfd_cell *cell = NULL; |
| 638 | int irq, ret, children = 0; |
| 639 | |
| 640 | if (!node) { |
| 641 | dev_err(&client->dev, "of node is missing\n"); |
| 642 | return -EINVAL; |
| 643 | } |
| 644 | |
| 645 | /* In order to operate correctly we need valid interrupt config */ |
| 646 | if (!client->irq) { |
| 647 | dev_err(&client->dev, "Invalid IRQ configuration\n"); |
| 648 | return -EINVAL; |
| 649 | } |
| 650 | |
| 651 | twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040), |
| 652 | GFP_KERNEL); |
| 653 | if (!twl6040) |
| 654 | return -ENOMEM; |
| 655 | |
| 656 | twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config); |
| 657 | if (IS_ERR(twl6040->regmap)) |
| 658 | return PTR_ERR(twl6040->regmap); |
| 659 | |
| 660 | i2c_set_clientdata(client, twl6040); |
| 661 | |
| 662 | twl6040->clk32k = devm_clk_get(&client->dev, "clk32k"); |
| 663 | if (IS_ERR(twl6040->clk32k)) { |
| 664 | if (PTR_ERR(twl6040->clk32k) == -EPROBE_DEFER) |
| 665 | return -EPROBE_DEFER; |
| 666 | dev_dbg(&client->dev, "clk32k is not handled\n"); |
| 667 | twl6040->clk32k = NULL; |
| 668 | } |
| 669 | |
| 670 | twl6040->mclk = devm_clk_get(&client->dev, "mclk"); |
| 671 | if (IS_ERR(twl6040->mclk)) { |
| 672 | if (PTR_ERR(twl6040->mclk) == -EPROBE_DEFER) |
| 673 | return -EPROBE_DEFER; |
| 674 | dev_dbg(&client->dev, "mclk is not handled\n"); |
| 675 | twl6040->mclk = NULL; |
| 676 | } |
| 677 | |
| 678 | twl6040->supplies[0].supply = "vio"; |
| 679 | twl6040->supplies[1].supply = "v2v1"; |
| 680 | ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES, |
| 681 | twl6040->supplies); |
| 682 | if (ret != 0) { |
| 683 | dev_err(&client->dev, "Failed to get supplies: %d\n", ret); |
| 684 | return ret; |
| 685 | } |
| 686 | |
| 687 | ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies); |
| 688 | if (ret != 0) { |
| 689 | dev_err(&client->dev, "Failed to enable supplies: %d\n", ret); |
| 690 | return ret; |
| 691 | } |
| 692 | |
| 693 | twl6040->dev = &client->dev; |
| 694 | twl6040->irq = client->irq; |
| 695 | |
| 696 | mutex_init(&twl6040->mutex); |
| 697 | init_completion(&twl6040->ready); |
| 698 | |
| 699 | regmap_register_patch(twl6040->regmap, twl6040_patch, |
| 700 | ARRAY_SIZE(twl6040_patch)); |
| 701 | |
| 702 | twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV); |
| 703 | if (twl6040->rev < 0) { |
| 704 | dev_err(&client->dev, "Failed to read revision register: %d\n", |
| 705 | twl6040->rev); |
| 706 | ret = twl6040->rev; |
| 707 | goto gpio_err; |
| 708 | } |
| 709 | |
| 710 | /* ERRATA: Automatic power-up is not possible in ES1.0 */ |
| 711 | if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) { |
| 712 | twl6040->audpwron = devm_gpiod_get_optional(&client->dev, |
| 713 | "ti,audpwron", |
| 714 | GPIOD_OUT_LOW); |
| 715 | ret = PTR_ERR_OR_ZERO(twl6040->audpwron); |
| 716 | if (ret) |
| 717 | goto gpio_err; |
| 718 | |
| 719 | gpiod_set_consumer_name(twl6040->audpwron, "audpwron"); |
| 720 | |
| 721 | /* Clear any pending interrupt */ |
| 722 | twl6040_reg_read(twl6040, TWL6040_REG_INTID); |
| 723 | } |
| 724 | |
| 725 | ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT, |
| 726 | 0, &twl6040_irq_chip, &twl6040->irq_data); |
| 727 | if (ret < 0) |
| 728 | goto gpio_err; |
| 729 | |
| 730 | twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data, |
| 731 | TWL6040_IRQ_READY); |
| 732 | twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data, |
| 733 | TWL6040_IRQ_TH); |
| 734 | |
| 735 | ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL, |
| 736 | twl6040_readyint_handler, IRQF_ONESHOT, |
| 737 | "twl6040_irq_ready", twl6040); |
| 738 | if (ret) { |
| 739 | dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret); |
| 740 | goto readyirq_err; |
| 741 | } |
| 742 | |
| 743 | ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL, |
| 744 | twl6040_thint_handler, IRQF_ONESHOT, |
| 745 | "twl6040_irq_th", twl6040); |
| 746 | if (ret) { |
| 747 | dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret); |
| 748 | goto readyirq_err; |
| 749 | } |
| 750 | |
| 751 | /* |
| 752 | * The main functionality of twl6040 to provide audio on OMAP4+ systems. |
| 753 | * We can add the ASoC codec child whenever this driver has been loaded. |
| 754 | */ |
| 755 | irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG); |
| 756 | cell = &twl6040->cells[children]; |
| 757 | cell->name = "twl6040-codec"; |
| 758 | twl6040_codec_rsrc[0].start = irq; |
| 759 | twl6040_codec_rsrc[0].end = irq; |
| 760 | cell->resources = twl6040_codec_rsrc; |
| 761 | cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc); |
| 762 | children++; |
| 763 | |
| 764 | /* Vibra input driver support */ |
| 765 | if (twl6040_has_vibra(node)) { |
| 766 | irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB); |
| 767 | |
| 768 | cell = &twl6040->cells[children]; |
| 769 | cell->name = "twl6040-vibra"; |
| 770 | twl6040_vibra_rsrc[0].start = irq; |
| 771 | twl6040_vibra_rsrc[0].end = irq; |
| 772 | cell->resources = twl6040_vibra_rsrc; |
| 773 | cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc); |
| 774 | children++; |
| 775 | } |
| 776 | |
| 777 | /* GPO support */ |
| 778 | cell = &twl6040->cells[children]; |
| 779 | cell->name = "twl6040-gpo"; |
| 780 | children++; |
| 781 | |
| 782 | /* PDM clock support */ |
| 783 | cell = &twl6040->cells[children]; |
| 784 | cell->name = "twl6040-pdmclk"; |
| 785 | children++; |
| 786 | |
| 787 | /* The chip is powered down so mark regmap to cache only and dirty */ |
| 788 | regcache_cache_only(twl6040->regmap, true); |
| 789 | regcache_mark_dirty(twl6040->regmap); |
| 790 | |
| 791 | ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children, |
| 792 | NULL, 0, NULL); |
| 793 | if (ret) |
| 794 | goto readyirq_err; |
| 795 | |
| 796 | return 0; |
| 797 | |
| 798 | readyirq_err: |
| 799 | regmap_del_irq_chip(twl6040->irq, twl6040->irq_data); |
| 800 | gpio_err: |
| 801 | regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies); |
| 802 | return ret; |
| 803 | } |
| 804 | |
| 805 | static void twl6040_remove(struct i2c_client *client) |
| 806 | { |
| 807 | struct twl6040 *twl6040 = i2c_get_clientdata(client); |
| 808 | |
| 809 | if (twl6040->power_count) |
| 810 | twl6040_power(twl6040, 0); |
| 811 | |
| 812 | regmap_del_irq_chip(twl6040->irq, twl6040->irq_data); |
| 813 | |
| 814 | mfd_remove_devices(&client->dev); |
| 815 | |
| 816 | regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies); |
| 817 | } |
| 818 | |
| 819 | static const struct i2c_device_id twl6040_i2c_id[] = { |
| 820 | { "twl6040", 0, }, |
| 821 | { "twl6041", 0, }, |
| 822 | { }, |
| 823 | }; |
| 824 | MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id); |
| 825 | |
| 826 | static struct i2c_driver twl6040_driver = { |
| 827 | .driver = { |
| 828 | .name = "twl6040", |
| 829 | }, |
| 830 | .probe = twl6040_probe, |
| 831 | .remove = twl6040_remove, |
| 832 | .id_table = twl6040_i2c_id, |
| 833 | }; |
| 834 | |
| 835 | module_i2c_driver(twl6040_driver); |
| 836 | |
| 837 | MODULE_DESCRIPTION("TWL6040 MFD"); |
| 838 | MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>"); |
| 839 | MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>"); |