drivers/acpi/pmic/intel_pmic_bytcrc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Intel Bay Trail Crystal Cove PMIC operation region driver
   4  *
   5  * Copyright (C) 2014 Intel Corporation. All rights reserved.
   6  */
   7
   8 #include <linux/acpi.h>
   9 #include <linux/init.h>
  10 #include <linux/mfd/intel_soc_pmic.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/regmap.h>
  13 #include "intel_pmic.h"
  14
  15 #define PWR_SOURCE_SELECT       BIT(1)
  16
  17 #define PMIC_A0LOCK_REG         0xc5
  18
  19 static struct pmic_table power_table[] = {
  20 /*      {
  21                 .address = 0x00,
  22                 .reg = ??,
  23                 .bit = ??,
  24         }, ** VSYS */
  25         {
  26                 .address = 0x04,
  27                 .reg = 0x63,
  28                 .bit = 0x00,
  29         }, /* SYSX -> VSYS_SX */
  30         {
  31                 .address = 0x08,
  32                 .reg = 0x62,
  33                 .bit = 0x00,
  34         }, /* SYSU -> VSYS_U */
  35         {
  36                 .address = 0x0c,
  37                 .reg = 0x64,
  38                 .bit = 0x00,
  39         }, /* SYSS -> VSYS_S */
  40         {
  41                 .address = 0x10,
  42                 .reg = 0x6a,
  43                 .bit = 0x00,
  44         }, /* V50S -> V5P0S */
  45         {
  46                 .address = 0x14,
  47                 .reg = 0x6b,
  48                 .bit = 0x00,
  49         }, /* HOST -> VHOST, USB2/3 host */
  50         {
  51                 .address = 0x18,
  52                 .reg = 0x6c,
  53                 .bit = 0x00,
  54         }, /* VBUS -> VBUS, USB2/3 OTG */
  55         {
  56                 .address = 0x1c,
  57                 .reg = 0x6d,
  58                 .bit = 0x00,
  59         }, /* HDMI -> VHDMI */
  60 /*      {
  61                 .address = 0x20,
  62                 .reg = ??,
  63                 .bit = ??,
  64         }, ** S285 */
  65         {
  66                 .address = 0x24,
  67                 .reg = 0x66,
  68                 .bit = 0x00,
  69         }, /* X285 -> V2P85SX, camera */
  70 /*      {
  71                 .address = 0x28,
  72                 .reg = ??,
  73                 .bit = ??,
  74         }, ** V33A */
  75         {
  76                 .address = 0x2c,
  77                 .reg = 0x69,
  78                 .bit = 0x00,
  79         }, /* V33S -> V3P3S, display/ssd/audio */
  80         {
  81                 .address = 0x30,
  82                 .reg = 0x68,
  83                 .bit = 0x00,
  84         }, /* V33U -> V3P3U, SDIO wifi&bt */
  85 /*      {
  86                 .address = 0x34 .. 0x40,
  87                 .reg = ??,
  88                 .bit = ??,
  89         }, ** V33I, V18A, REFQ, V12A */
  90         {
  91                 .address = 0x44,
  92                 .reg = 0x5c,
  93                 .bit = 0x00,
  94         }, /* V18S -> V1P8S, SOC/USB PHY/SIM */
  95         {
  96                 .address = 0x48,
  97                 .reg = 0x5d,
  98                 .bit = 0x00,
  99         }, /* V18X -> V1P8SX, eMMC/camara/audio */
 100         {
 101                 .address = 0x4c,
 102                 .reg = 0x5b,
 103                 .bit = 0x00,
 104         }, /* V18U -> V1P8U, LPDDR */
 105         {
 106                 .address = 0x50,
 107                 .reg = 0x61,
 108                 .bit = 0x00,
 109         }, /* V12X -> V1P2SX, SOC SFR */
 110         {
 111                 .address = 0x54,
 112                 .reg = 0x60,
 113                 .bit = 0x00,
 114         }, /* V12S -> V1P2S, MIPI */
 115 /*      {
 116                 .address = 0x58,
 117                 .reg = ??,
 118                 .bit = ??,
 119         }, ** V10A */
 120         {
 121                 .address = 0x5c,
 122                 .reg = 0x56,
 123                 .bit = 0x00,
 124         }, /* V10S -> V1P0S, SOC GFX */
 125         {
 126                 .address = 0x60,
 127                 .reg = 0x57,
 128                 .bit = 0x00,
 129         }, /* V10X -> V1P0SX, SOC display/DDR IO/PCIe */
 130         {
 131                 .address = 0x64,
 132                 .reg = 0x59,
 133                 .bit = 0x00,
 134         }, /* V105 -> V1P05S, L2 SRAM */
 135 };
 136
 137 static struct pmic_table thermal_table[] = {
 138         {
 139                 .address = 0x00,
 140                 .reg = 0x75
 141         },
 142         {
 143                 .address = 0x04,
 144                 .reg = 0x95
 145         },
 146         {
 147                 .address = 0x08,
 148                 .reg = 0x97
 149         },
 150         {
 151                 .address = 0x0c,
 152                 .reg = 0x77
 153         },
 154         {
 155                 .address = 0x10,
 156                 .reg = 0x9a
 157         },
 158         {
 159                 .address = 0x14,
 160                 .reg = 0x9c
 161         },
 162         {
 163                 .address = 0x18,
 164                 .reg = 0x79
 165         },
 166         {
 167                 .address = 0x1c,
 168                 .reg = 0x9f
 169         },
 170         {
 171                 .address = 0x20,
 172                 .reg = 0xa1
 173         },
 174         {
 175                 .address = 0x48,
 176                 .reg = 0x94
 177         },
 178         {
 179                 .address = 0x4c,
 180                 .reg = 0x99
 181         },
 182         {
 183                 .address = 0x50,
 184                 .reg = 0x9e
 185         },
 186 };
 187
 188 static int intel_crc_pmic_get_power(struct regmap *regmap, int reg,
 189                                     int bit, u64 *value)
 190 {
 191         int data;
 192
 193         if (regmap_read(regmap, reg, &data))
 194                 return -EIO;
 195
 196         *value = (data & PWR_SOURCE_SELECT) && (data & BIT(bit)) ? 1 : 0;
 197         return 0;
 198 }
 199
 200 static int intel_crc_pmic_update_power(struct regmap *regmap, int reg,
 201                                        int bit, bool on)
 202 {
 203         int data;
 204
 205         if (regmap_read(regmap, reg, &data))
 206                 return -EIO;
 207
 208         if (on) {
 209                 data |= PWR_SOURCE_SELECT | BIT(bit);
 210         } else {
 211                 data &= ~BIT(bit);
 212                 data |= PWR_SOURCE_SELECT;
 213         }
 214
 215         if (regmap_write(regmap, reg, data))
 216                 return -EIO;
 217         return 0;
 218 }
 219
 220 static int intel_crc_pmic_get_raw_temp(struct regmap *regmap, int reg)
 221 {
 222         int temp_l, temp_h;
 223
 224         /*
 225          * Raw temperature value is 10bits: 8bits in reg
 226          * and 2bits in reg-1: bit0,1
 227          */
 228         if (regmap_read(regmap, reg, &temp_l) ||
 229             regmap_read(regmap, reg - 1, &temp_h))
 230                 return -EIO;
 231
 232         return temp_l | (temp_h & 0x3) << 8;
 233 }
 234
 235 static int intel_crc_pmic_update_aux(struct regmap *regmap, int reg, int raw)
 236 {
 237         return regmap_write(regmap, reg, raw) ||
 238                 regmap_update_bits(regmap, reg - 1, 0x3, raw >> 8) ? -EIO : 0;
 239 }
 240
 241 static int intel_crc_pmic_get_policy(struct regmap *regmap,
 242                                         int reg, int bit, u64 *value)
 243 {
 244         int pen;
 245
 246         if (regmap_read(regmap, reg, &pen))
 247                 return -EIO;
 248         *value = pen >> 7;
 249         return 0;
 250 }
 251
 252 static int intel_crc_pmic_update_policy(struct regmap *regmap,
 253                                         int reg, int bit, int enable)
 254 {
 255         int alert0;
 256
 257         /* Update to policy enable bit requires unlocking a0lock */
 258         if (regmap_read(regmap, PMIC_A0LOCK_REG, &alert0))
 259                 return -EIO;
 260
 261         if (regmap_update_bits(regmap, PMIC_A0LOCK_REG, 0x01, 0))
 262                 return -EIO;
 263
 264         if (regmap_update_bits(regmap, reg, 0x80, enable << 7))
 265                 return -EIO;
 266
 267         /* restore alert0 */
 268         if (regmap_write(regmap, PMIC_A0LOCK_REG, alert0))
 269                 return -EIO;
 270
 271         return 0;
 272 }
 273
 274 static struct intel_pmic_opregion_data intel_crc_pmic_opregion_data = {
 275         .get_power      = intel_crc_pmic_get_power,
 276         .update_power   = intel_crc_pmic_update_power,
 277         .get_raw_temp   = intel_crc_pmic_get_raw_temp,
 278         .update_aux     = intel_crc_pmic_update_aux,
 279         .get_policy     = intel_crc_pmic_get_policy,
 280         .update_policy  = intel_crc_pmic_update_policy,
 281         .power_table    = power_table,
 282         .power_table_count= ARRAY_SIZE(power_table),
 283         .thermal_table  = thermal_table,
 284         .thermal_table_count = ARRAY_SIZE(thermal_table),
 285 };
 286
 287 static int intel_crc_pmic_opregion_probe(struct platform_device *pdev)
 288 {
 289         struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
 290         return intel_pmic_install_opregion_handler(&pdev->dev,
 291                         ACPI_HANDLE(pdev->dev.parent), pmic->regmap,
 292                         &intel_crc_pmic_opregion_data);
 293 }
 294
 295 static struct platform_driver intel_crc_pmic_opregion_driver = {
 296         .probe = intel_crc_pmic_opregion_probe,
 297         .driver = {
 298                 .name = "byt_crystal_cove_pmic",
 299         },
 300 };
 301 builtin_platform_driver(intel_crc_pmic_opregion_driver);