11802d0beSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2b1eea857SAaron Lu /* 3b1eea857SAaron Lu * intel_pmic.c - Intel PMIC operation region driver 4b1eea857SAaron Lu * 5b1eea857SAaron Lu * Copyright (C) 2014 Intel Corporation. All rights reserved. 6b1eea857SAaron Lu */ 7b1eea857SAaron Lu 86d3ef8d8SPaul Gortmaker #include <linux/export.h> 9b1eea857SAaron Lu #include <linux/acpi.h> 107b5618f4SHans de Goede #include <linux/mfd/intel_soc_pmic.h> 11b1eea857SAaron Lu #include <linux/regmap.h> 12ac586e2dSSrinivas Pandruvada #include <acpi/acpi_lpat.h> 13b1eea857SAaron Lu #include "intel_pmic.h" 14b1eea857SAaron Lu 15b1eea857SAaron Lu #define PMIC_POWER_OPREGION_ID 0x8d 16b1eea857SAaron Lu #define PMIC_THERMAL_OPREGION_ID 0x8c 170afa877aSFelipe Balbi #define PMIC_REGS_OPREGION_ID 0x8f 180afa877aSFelipe Balbi 190afa877aSFelipe Balbi struct intel_pmic_regs_handler_ctx { 200afa877aSFelipe Balbi unsigned int val; 210afa877aSFelipe Balbi u16 addr; 220afa877aSFelipe Balbi }; 23b1eea857SAaron Lu 24b1eea857SAaron Lu struct intel_pmic_opregion { 25b1eea857SAaron Lu struct mutex lock; 26ac586e2dSSrinivas Pandruvada struct acpi_lpat_conversion_table *lpat_table; 27b1eea857SAaron Lu struct regmap *regmap; 28b1eea857SAaron Lu struct intel_pmic_opregion_data *data; 290afa877aSFelipe Balbi struct intel_pmic_regs_handler_ctx ctx; 30b1eea857SAaron Lu }; 31b1eea857SAaron Lu 327b5618f4SHans de Goede static struct intel_pmic_opregion *intel_pmic_opregion; 337b5618f4SHans de Goede 34b1eea857SAaron Lu static int pmic_get_reg_bit(int address, struct pmic_table *table, 35b1eea857SAaron Lu int count, int *reg, int *bit) 36b1eea857SAaron Lu { 37b1eea857SAaron Lu int i; 38b1eea857SAaron Lu 39b1eea857SAaron Lu for (i = 0; i < count; i++) { 40b1eea857SAaron Lu if (table[i].address == address) { 41b1eea857SAaron Lu *reg = table[i].reg; 42b1eea857SAaron Lu if (bit) 43b1eea857SAaron Lu *bit = table[i].bit; 44b1eea857SAaron Lu return 0; 45b1eea857SAaron Lu } 46b1eea857SAaron Lu } 47b1eea857SAaron Lu return -ENOENT; 48b1eea857SAaron Lu } 49b1eea857SAaron Lu 50b1eea857SAaron Lu static acpi_status intel_pmic_power_handler(u32 function, 51b1eea857SAaron Lu acpi_physical_address address, u32 bits, u64 *value64, 52b1eea857SAaron Lu void *handler_context, void *region_context) 53b1eea857SAaron Lu { 54b1eea857SAaron Lu struct intel_pmic_opregion *opregion = region_context; 55b1eea857SAaron Lu struct regmap *regmap = opregion->regmap; 56b1eea857SAaron Lu struct intel_pmic_opregion_data *d = opregion->data; 57b1eea857SAaron Lu int reg, bit, result; 58b1eea857SAaron Lu 59b1eea857SAaron Lu if (bits != 32 || !value64) 60b1eea857SAaron Lu return AE_BAD_PARAMETER; 61b1eea857SAaron Lu 62b1eea857SAaron Lu if (function == ACPI_WRITE && !(*value64 == 0 || *value64 == 1)) 63b1eea857SAaron Lu return AE_BAD_PARAMETER; 64b1eea857SAaron Lu 65b1eea857SAaron Lu result = pmic_get_reg_bit(address, d->power_table, 66b1eea857SAaron Lu d->power_table_count, ®, &bit); 67b1eea857SAaron Lu if (result == -ENOENT) 68b1eea857SAaron Lu return AE_BAD_PARAMETER; 69b1eea857SAaron Lu 70b1eea857SAaron Lu mutex_lock(&opregion->lock); 71b1eea857SAaron Lu 72b1eea857SAaron Lu result = function == ACPI_READ ? 73b1eea857SAaron Lu d->get_power(regmap, reg, bit, value64) : 74b1eea857SAaron Lu d->update_power(regmap, reg, bit, *value64 == 1); 75b1eea857SAaron Lu 76b1eea857SAaron Lu mutex_unlock(&opregion->lock); 77b1eea857SAaron Lu 78b1eea857SAaron Lu return result ? AE_ERROR : AE_OK; 79b1eea857SAaron Lu } 80b1eea857SAaron Lu 81b1eea857SAaron Lu static int pmic_read_temp(struct intel_pmic_opregion *opregion, 82b1eea857SAaron Lu int reg, u64 *value) 83b1eea857SAaron Lu { 84b1eea857SAaron Lu int raw_temp, temp; 85b1eea857SAaron Lu 86b1eea857SAaron Lu if (!opregion->data->get_raw_temp) 87b1eea857SAaron Lu return -ENXIO; 88b1eea857SAaron Lu 89b1eea857SAaron Lu raw_temp = opregion->data->get_raw_temp(opregion->regmap, reg); 90b1eea857SAaron Lu if (raw_temp < 0) 91b1eea857SAaron Lu return raw_temp; 92b1eea857SAaron Lu 93ac586e2dSSrinivas Pandruvada if (!opregion->lpat_table) { 94b1eea857SAaron Lu *value = raw_temp; 95b1eea857SAaron Lu return 0; 96b1eea857SAaron Lu } 97b1eea857SAaron Lu 98ac586e2dSSrinivas Pandruvada temp = acpi_lpat_raw_to_temp(opregion->lpat_table, raw_temp); 99b1eea857SAaron Lu if (temp < 0) 100b1eea857SAaron Lu return temp; 101b1eea857SAaron Lu 102b1eea857SAaron Lu *value = temp; 103b1eea857SAaron Lu return 0; 104b1eea857SAaron Lu } 105b1eea857SAaron Lu 106b1eea857SAaron Lu static int pmic_thermal_temp(struct intel_pmic_opregion *opregion, int reg, 107b1eea857SAaron Lu u32 function, u64 *value) 108b1eea857SAaron Lu { 109b1eea857SAaron Lu return function == ACPI_READ ? 110b1eea857SAaron Lu pmic_read_temp(opregion, reg, value) : -EINVAL; 111b1eea857SAaron Lu } 112b1eea857SAaron Lu 113b1eea857SAaron Lu static int pmic_thermal_aux(struct intel_pmic_opregion *opregion, int reg, 114b1eea857SAaron Lu u32 function, u64 *value) 115b1eea857SAaron Lu { 116b1eea857SAaron Lu int raw_temp; 117b1eea857SAaron Lu 118b1eea857SAaron Lu if (function == ACPI_READ) 119b1eea857SAaron Lu return pmic_read_temp(opregion, reg, value); 120b1eea857SAaron Lu 121b1eea857SAaron Lu if (!opregion->data->update_aux) 122b1eea857SAaron Lu return -ENXIO; 123b1eea857SAaron Lu 124ac586e2dSSrinivas Pandruvada if (opregion->lpat_table) { 125ac586e2dSSrinivas Pandruvada raw_temp = acpi_lpat_temp_to_raw(opregion->lpat_table, *value); 126b1eea857SAaron Lu if (raw_temp < 0) 127b1eea857SAaron Lu return raw_temp; 128b1eea857SAaron Lu } else { 129b1eea857SAaron Lu raw_temp = *value; 130b1eea857SAaron Lu } 131b1eea857SAaron Lu 132b1eea857SAaron Lu return opregion->data->update_aux(opregion->regmap, reg, raw_temp); 133b1eea857SAaron Lu } 134b1eea857SAaron Lu 135b1eea857SAaron Lu static int pmic_thermal_pen(struct intel_pmic_opregion *opregion, int reg, 136d8ba8191SBin Gao int bit, u32 function, u64 *value) 137b1eea857SAaron Lu { 138b1eea857SAaron Lu struct intel_pmic_opregion_data *d = opregion->data; 139b1eea857SAaron Lu struct regmap *regmap = opregion->regmap; 140b1eea857SAaron Lu 141b1eea857SAaron Lu if (!d->get_policy || !d->update_policy) 142b1eea857SAaron Lu return -ENXIO; 143b1eea857SAaron Lu 144b1eea857SAaron Lu if (function == ACPI_READ) 145d8ba8191SBin Gao return d->get_policy(regmap, reg, bit, value); 146b1eea857SAaron Lu 147b1eea857SAaron Lu if (*value != 0 && *value != 1) 148b1eea857SAaron Lu return -EINVAL; 149b1eea857SAaron Lu 150d8ba8191SBin Gao return d->update_policy(regmap, reg, bit, *value); 151b1eea857SAaron Lu } 152b1eea857SAaron Lu 153b1eea857SAaron Lu static bool pmic_thermal_is_temp(int address) 154b1eea857SAaron Lu { 155b1eea857SAaron Lu return (address <= 0x3c) && !(address % 12); 156b1eea857SAaron Lu } 157b1eea857SAaron Lu 158b1eea857SAaron Lu static bool pmic_thermal_is_aux(int address) 159b1eea857SAaron Lu { 160b1eea857SAaron Lu return (address >= 4 && address <= 0x40 && !((address - 4) % 12)) || 161b1eea857SAaron Lu (address >= 8 && address <= 0x44 && !((address - 8) % 12)); 162b1eea857SAaron Lu } 163b1eea857SAaron Lu 164b1eea857SAaron Lu static bool pmic_thermal_is_pen(int address) 165b1eea857SAaron Lu { 166b1eea857SAaron Lu return address >= 0x48 && address <= 0x5c; 167b1eea857SAaron Lu } 168b1eea857SAaron Lu 169b1eea857SAaron Lu static acpi_status intel_pmic_thermal_handler(u32 function, 170b1eea857SAaron Lu acpi_physical_address address, u32 bits, u64 *value64, 171b1eea857SAaron Lu void *handler_context, void *region_context) 172b1eea857SAaron Lu { 173b1eea857SAaron Lu struct intel_pmic_opregion *opregion = region_context; 174b1eea857SAaron Lu struct intel_pmic_opregion_data *d = opregion->data; 175d8ba8191SBin Gao int reg, bit, result; 176b1eea857SAaron Lu 177b1eea857SAaron Lu if (bits != 32 || !value64) 178b1eea857SAaron Lu return AE_BAD_PARAMETER; 179b1eea857SAaron Lu 180b1eea857SAaron Lu result = pmic_get_reg_bit(address, d->thermal_table, 181d8ba8191SBin Gao d->thermal_table_count, ®, &bit); 182b1eea857SAaron Lu if (result == -ENOENT) 183b1eea857SAaron Lu return AE_BAD_PARAMETER; 184b1eea857SAaron Lu 185b1eea857SAaron Lu mutex_lock(&opregion->lock); 186b1eea857SAaron Lu 187b1eea857SAaron Lu if (pmic_thermal_is_temp(address)) 188b1eea857SAaron Lu result = pmic_thermal_temp(opregion, reg, function, value64); 189b1eea857SAaron Lu else if (pmic_thermal_is_aux(address)) 190b1eea857SAaron Lu result = pmic_thermal_aux(opregion, reg, function, value64); 191b1eea857SAaron Lu else if (pmic_thermal_is_pen(address)) 192d8ba8191SBin Gao result = pmic_thermal_pen(opregion, reg, bit, 193d8ba8191SBin Gao function, value64); 194b1eea857SAaron Lu else 195b1eea857SAaron Lu result = -EINVAL; 196b1eea857SAaron Lu 197b1eea857SAaron Lu mutex_unlock(&opregion->lock); 198b1eea857SAaron Lu 199b1eea857SAaron Lu if (result < 0) { 200b1eea857SAaron Lu if (result == -EINVAL) 201b1eea857SAaron Lu return AE_BAD_PARAMETER; 202b1eea857SAaron Lu else 203b1eea857SAaron Lu return AE_ERROR; 204b1eea857SAaron Lu } 205b1eea857SAaron Lu 206b1eea857SAaron Lu return AE_OK; 207b1eea857SAaron Lu } 208b1eea857SAaron Lu 2090afa877aSFelipe Balbi static acpi_status intel_pmic_regs_handler(u32 function, 2100afa877aSFelipe Balbi acpi_physical_address address, u32 bits, u64 *value64, 2110afa877aSFelipe Balbi void *handler_context, void *region_context) 2120afa877aSFelipe Balbi { 2130afa877aSFelipe Balbi struct intel_pmic_opregion *opregion = region_context; 214730de199SFelipe Balbi int result = 0; 2150afa877aSFelipe Balbi 2160afa877aSFelipe Balbi switch (address) { 2170afa877aSFelipe Balbi case 0: 2180afa877aSFelipe Balbi return AE_OK; 2190afa877aSFelipe Balbi case 1: 2200afa877aSFelipe Balbi opregion->ctx.addr |= (*value64 & 0xff) << 8; 2210afa877aSFelipe Balbi return AE_OK; 2220afa877aSFelipe Balbi case 2: 2230afa877aSFelipe Balbi opregion->ctx.addr |= *value64 & 0xff; 2240afa877aSFelipe Balbi return AE_OK; 2250afa877aSFelipe Balbi case 3: 2260afa877aSFelipe Balbi opregion->ctx.val = *value64 & 0xff; 2270afa877aSFelipe Balbi return AE_OK; 2280afa877aSFelipe Balbi case 4: 2290afa877aSFelipe Balbi if (*value64) { 2300afa877aSFelipe Balbi result = regmap_write(opregion->regmap, opregion->ctx.addr, 2310afa877aSFelipe Balbi opregion->ctx.val); 2320afa877aSFelipe Balbi } else { 2330afa877aSFelipe Balbi result = regmap_read(opregion->regmap, opregion->ctx.addr, 2340afa877aSFelipe Balbi &opregion->ctx.val); 2350afa877aSFelipe Balbi if (result == 0) 2360afa877aSFelipe Balbi *value64 = opregion->ctx.val; 2370afa877aSFelipe Balbi } 2380afa877aSFelipe Balbi memset(&opregion->ctx, 0x00, sizeof(opregion->ctx)); 2390afa877aSFelipe Balbi } 2400afa877aSFelipe Balbi 2410afa877aSFelipe Balbi if (result < 0) { 2420afa877aSFelipe Balbi if (result == -EINVAL) 2430afa877aSFelipe Balbi return AE_BAD_PARAMETER; 2440afa877aSFelipe Balbi else 2450afa877aSFelipe Balbi return AE_ERROR; 2460afa877aSFelipe Balbi } 2470afa877aSFelipe Balbi 2480afa877aSFelipe Balbi return AE_OK; 2490afa877aSFelipe Balbi } 2500afa877aSFelipe Balbi 251b1eea857SAaron Lu int intel_pmic_install_opregion_handler(struct device *dev, acpi_handle handle, 252b1eea857SAaron Lu struct regmap *regmap, 253b1eea857SAaron Lu struct intel_pmic_opregion_data *d) 254b1eea857SAaron Lu { 255b1eea857SAaron Lu acpi_status status; 256b1eea857SAaron Lu struct intel_pmic_opregion *opregion; 257ac586e2dSSrinivas Pandruvada int ret; 258b1eea857SAaron Lu 259b1eea857SAaron Lu if (!dev || !regmap || !d) 260b1eea857SAaron Lu return -EINVAL; 261b1eea857SAaron Lu 262b1eea857SAaron Lu if (!handle) 263b1eea857SAaron Lu return -ENODEV; 264b1eea857SAaron Lu 265b1eea857SAaron Lu opregion = devm_kzalloc(dev, sizeof(*opregion), GFP_KERNEL); 266b1eea857SAaron Lu if (!opregion) 267b1eea857SAaron Lu return -ENOMEM; 268b1eea857SAaron Lu 269b1eea857SAaron Lu mutex_init(&opregion->lock); 270b1eea857SAaron Lu opregion->regmap = regmap; 271ac586e2dSSrinivas Pandruvada opregion->lpat_table = acpi_lpat_get_conversion_table(handle); 272b1eea857SAaron Lu 273b1eea857SAaron Lu status = acpi_install_address_space_handler(handle, 274b1eea857SAaron Lu PMIC_POWER_OPREGION_ID, 275b1eea857SAaron Lu intel_pmic_power_handler, 276b1eea857SAaron Lu NULL, opregion); 277ac586e2dSSrinivas Pandruvada if (ACPI_FAILURE(status)) { 278ac586e2dSSrinivas Pandruvada ret = -ENODEV; 279ac586e2dSSrinivas Pandruvada goto out_error; 280ac586e2dSSrinivas Pandruvada } 281b1eea857SAaron Lu 282b1eea857SAaron Lu status = acpi_install_address_space_handler(handle, 283b1eea857SAaron Lu PMIC_THERMAL_OPREGION_ID, 284b1eea857SAaron Lu intel_pmic_thermal_handler, 285b1eea857SAaron Lu NULL, opregion); 286b1eea857SAaron Lu if (ACPI_FAILURE(status)) { 287b1eea857SAaron Lu acpi_remove_address_space_handler(handle, PMIC_POWER_OPREGION_ID, 288b1eea857SAaron Lu intel_pmic_power_handler); 289ac586e2dSSrinivas Pandruvada ret = -ENODEV; 2900afa877aSFelipe Balbi goto out_remove_power_handler; 2910afa877aSFelipe Balbi } 2920afa877aSFelipe Balbi 2930afa877aSFelipe Balbi status = acpi_install_address_space_handler(handle, 2940afa877aSFelipe Balbi PMIC_REGS_OPREGION_ID, intel_pmic_regs_handler, NULL, 2950afa877aSFelipe Balbi opregion); 2960afa877aSFelipe Balbi if (ACPI_FAILURE(status)) { 2970afa877aSFelipe Balbi ret = -ENODEV; 2980afa877aSFelipe Balbi goto out_remove_thermal_handler; 299b1eea857SAaron Lu } 300b1eea857SAaron Lu 301b1eea857SAaron Lu opregion->data = d; 3027b5618f4SHans de Goede intel_pmic_opregion = opregion; 303b1eea857SAaron Lu return 0; 304ac586e2dSSrinivas Pandruvada 3050afa877aSFelipe Balbi out_remove_thermal_handler: 3060afa877aSFelipe Balbi acpi_remove_address_space_handler(handle, PMIC_THERMAL_OPREGION_ID, 3070afa877aSFelipe Balbi intel_pmic_thermal_handler); 3080afa877aSFelipe Balbi 3090afa877aSFelipe Balbi out_remove_power_handler: 3100afa877aSFelipe Balbi acpi_remove_address_space_handler(handle, PMIC_POWER_OPREGION_ID, 3110afa877aSFelipe Balbi intel_pmic_power_handler); 3120afa877aSFelipe Balbi 313ac586e2dSSrinivas Pandruvada out_error: 314ac586e2dSSrinivas Pandruvada acpi_lpat_free_conversion_table(opregion->lpat_table); 315ac586e2dSSrinivas Pandruvada return ret; 316b1eea857SAaron Lu } 317b1eea857SAaron Lu EXPORT_SYMBOL_GPL(intel_pmic_install_opregion_handler); 3187b5618f4SHans de Goede 3197b5618f4SHans de Goede /** 3207b5618f4SHans de Goede * intel_soc_pmic_exec_mipi_pmic_seq_element - Execute PMIC MIPI sequence 3217b5618f4SHans de Goede * @i2c_address: I2C client address for the PMIC 3227b5618f4SHans de Goede * @reg_address: PMIC register address 3237b5618f4SHans de Goede * @value: New value for the register bits to change 3247b5618f4SHans de Goede * @mask: Mask indicating which register bits to change 3257b5618f4SHans de Goede * 3267b5618f4SHans de Goede * DSI LCD panels describe an initialization sequence in the i915 VBT (Video 3277b5618f4SHans de Goede * BIOS Tables) using so called MIPI sequences. One possible element in these 3287b5618f4SHans de Goede * sequences is a PMIC specific element of 15 bytes. 3297b5618f4SHans de Goede * 3307b5618f4SHans de Goede * This function executes these PMIC specific elements sending the embedded 3317b5618f4SHans de Goede * commands to the PMIC. 3327b5618f4SHans de Goede * 3337b5618f4SHans de Goede * Return 0 on success, < 0 on failure. 3347b5618f4SHans de Goede */ 3357b5618f4SHans de Goede int intel_soc_pmic_exec_mipi_pmic_seq_element(u16 i2c_address, u32 reg_address, 3367b5618f4SHans de Goede u32 value, u32 mask) 3377b5618f4SHans de Goede { 3387b5618f4SHans de Goede struct intel_pmic_opregion_data *d; 3397b5618f4SHans de Goede int ret; 3407b5618f4SHans de Goede 3417b5618f4SHans de Goede if (!intel_pmic_opregion) { 3427b5618f4SHans de Goede pr_warn("%s: No PMIC registered\n", __func__); 3437b5618f4SHans de Goede return -ENXIO; 3447b5618f4SHans de Goede } 3457b5618f4SHans de Goede 3467b5618f4SHans de Goede d = intel_pmic_opregion->data; 3477b5618f4SHans de Goede 3487b5618f4SHans de Goede mutex_lock(&intel_pmic_opregion->lock); 3497b5618f4SHans de Goede 3507b5618f4SHans de Goede if (d->exec_mipi_pmic_seq_element) { 3517b5618f4SHans de Goede ret = d->exec_mipi_pmic_seq_element(intel_pmic_opregion->regmap, 3527b5618f4SHans de Goede i2c_address, reg_address, 3537b5618f4SHans de Goede value, mask); 354429188f0SHans de Goede } else if (d->pmic_i2c_address) { 355429188f0SHans de Goede if (i2c_address == d->pmic_i2c_address) { 356429188f0SHans de Goede ret = regmap_update_bits(intel_pmic_opregion->regmap, 357429188f0SHans de Goede reg_address, mask, value); 358429188f0SHans de Goede } else { 359429188f0SHans de Goede pr_err("%s: Unexpected i2c-addr: 0x%02x (reg-addr 0x%x value 0x%x mask 0x%x)\n", 360429188f0SHans de Goede __func__, i2c_address, reg_address, value, mask); 361429188f0SHans de Goede ret = -ENXIO; 362429188f0SHans de Goede } 3637b5618f4SHans de Goede } else { 3647b5618f4SHans de Goede pr_warn("%s: Not implemented\n", __func__); 3657b5618f4SHans de Goede pr_warn("%s: i2c-addr: 0x%x reg-addr 0x%x value 0x%x mask 0x%x\n", 3667b5618f4SHans de Goede __func__, i2c_address, reg_address, value, mask); 3677b5618f4SHans de Goede ret = -EOPNOTSUPP; 3687b5618f4SHans de Goede } 3697b5618f4SHans de Goede 3707b5618f4SHans de Goede mutex_unlock(&intel_pmic_opregion->lock); 3717b5618f4SHans de Goede 3727b5618f4SHans de Goede return ret; 3737b5618f4SHans de Goede } 3747b5618f4SHans de Goede EXPORT_SYMBOL_GPL(intel_soc_pmic_exec_mipi_pmic_seq_element); 375