drivers/acpi/pmic/intel_pmic_bxtwc.c

   1 /*
   2  * intel_pmic_bxtwc.c - Intel BXT WhiskeyCove PMIC operation region driver
   3  *
   4  * Copyright (C) 2015 Intel Corporation. All rights reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version
   8  * 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/acpi.h>
  18 #include <linux/mfd/intel_soc_pmic.h>
  19 #include <linux/regmap.h>
  20 #include <linux/platform_device.h>
  21 #include "intel_pmic.h"
  22
  23 #define WHISKEY_COVE_ALRT_HIGH_BIT_MASK 0x0F
  24 #define WHISKEY_COVE_ADC_HIGH_BIT(x)    (((x & 0x0F) << 8))
  25 #define WHISKEY_COVE_ADC_CURSRC(x)      (((x & 0xF0) >> 4))
  26 #define VR_MODE_DISABLED        0
  27 #define VR_MODE_AUTO            BIT(0)
  28 #define VR_MODE_NORMAL          BIT(1)
  29 #define VR_MODE_SWITCH          BIT(2)
  30 #define VR_MODE_ECO             (BIT(0)|BIT(1))
  31 #define VSWITCH2_OUTPUT         BIT(5)
  32 #define VSWITCH1_OUTPUT         BIT(4)
  33 #define VUSBPHY_CHARGE          BIT(1)
  34
  35 static struct pmic_table power_table[] = {
  36         {
  37                 .address = 0x0,
  38                 .reg = 0x63,
  39                 .bit = VR_MODE_AUTO,
  40         }, /* VDD1 -> VDD1CNT */
  41         {
  42                 .address = 0x04,
  43                 .reg = 0x65,
  44                 .bit = VR_MODE_AUTO,
  45         }, /* VDD2 -> VDD2CNT */
  46         {
  47                 .address = 0x08,
  48                 .reg = 0x67,
  49                 .bit = VR_MODE_AUTO,
  50         }, /* VDD3 -> VDD3CNT */
  51         {
  52                 .address = 0x0c,
  53                 .reg = 0x6d,
  54                 .bit = VR_MODE_AUTO,
  55         }, /* VLFX -> VFLEXCNT */
  56         {
  57                 .address = 0x10,
  58                 .reg = 0x6f,
  59                 .bit = VR_MODE_NORMAL,
  60         }, /* VP1A -> VPROG1ACNT */
  61         {
  62                 .address = 0x14,
  63                 .reg = 0x70,
  64                 .bit = VR_MODE_NORMAL,
  65         }, /* VP1B -> VPROG1BCNT */
  66         {
  67                 .address = 0x18,
  68                 .reg = 0x71,
  69                 .bit = VR_MODE_NORMAL,
  70         }, /* VP1C -> VPROG1CCNT */
  71         {
  72                 .address = 0x1c,
  73                 .reg = 0x72,
  74                 .bit = VR_MODE_NORMAL,
  75         }, /* VP1D -> VPROG1DCNT */
  76         {
  77                 .address = 0x20,
  78                 .reg = 0x73,
  79                 .bit = VR_MODE_NORMAL,
  80         }, /* VP2A -> VPROG2ACNT */
  81         {
  82                 .address = 0x24,
  83                 .reg = 0x74,
  84                 .bit = VR_MODE_NORMAL,
  85         }, /* VP2B -> VPROG2BCNT */
  86         {
  87                 .address = 0x28,
  88                 .reg = 0x75,
  89                 .bit = VR_MODE_NORMAL,
  90         }, /* VP2C -> VPROG2CCNT */
  91         {
  92                 .address = 0x2c,
  93                 .reg = 0x76,
  94                 .bit = VR_MODE_NORMAL,
  95         }, /* VP3A -> VPROG3ACNT */
  96         {
  97                 .address = 0x30,
  98                 .reg = 0x77,
  99                 .bit = VR_MODE_NORMAL,
 100         }, /* VP3B -> VPROG3BCNT */
 101         {
 102                 .address = 0x34,
 103                 .reg = 0x78,
 104                 .bit = VSWITCH2_OUTPUT,
 105         }, /* VSW2 -> VLD0CNT Bit 5*/
 106         {
 107                 .address = 0x38,
 108                 .reg = 0x78,
 109                 .bit = VSWITCH1_OUTPUT,
 110         }, /* VSW1 -> VLD0CNT Bit 4 */
 111         {
 112                 .address = 0x3c,
 113                 .reg = 0x78,
 114                 .bit = VUSBPHY_CHARGE,
 115         }, /* VUPY -> VLDOCNT Bit 1 */
 116         {
 117                 .address = 0x40,
 118                 .reg = 0x7b,
 119                 .bit = VR_MODE_NORMAL,
 120         }, /* VRSO -> VREFSOCCNT*/
 121         {
 122                 .address = 0x44,
 123                 .reg = 0xA0,
 124                 .bit = VR_MODE_NORMAL,
 125         }, /* VP1E -> VPROG1ECNT */
 126         {
 127                 .address = 0x48,
 128                 .reg = 0xA1,
 129                 .bit = VR_MODE_NORMAL,
 130         }, /* VP1F -> VPROG1FCNT */
 131         {
 132                 .address = 0x4c,
 133                 .reg = 0xA2,
 134                 .bit = VR_MODE_NORMAL,
 135         }, /* VP2D -> VPROG2DCNT */
 136         {
 137                 .address = 0x50,
 138                 .reg = 0xA3,
 139                 .bit = VR_MODE_NORMAL,
 140         }, /* VP4A -> VPROG4ACNT */
 141         {
 142                 .address = 0x54,
 143                 .reg = 0xA4,
 144                 .bit = VR_MODE_NORMAL,
 145         }, /* VP4B -> VPROG4BCNT */
 146         {
 147                 .address = 0x58,
 148                 .reg = 0xA5,
 149                 .bit = VR_MODE_NORMAL,
 150         }, /* VP4C -> VPROG4CCNT */
 151         {
 152                 .address = 0x5c,
 153                 .reg = 0xA6,
 154                 .bit = VR_MODE_NORMAL,
 155         }, /* VP4D -> VPROG4DCNT */
 156         {
 157                 .address = 0x60,
 158                 .reg = 0xA7,
 159                 .bit = VR_MODE_NORMAL,
 160         }, /* VP5A -> VPROG5ACNT */
 161         {
 162                 .address = 0x64,
 163                 .reg = 0xA8,
 164                 .bit = VR_MODE_NORMAL,
 165         }, /* VP5B -> VPROG5BCNT */
 166         {
 167                 .address = 0x68,
 168                 .reg = 0xA9,
 169                 .bit = VR_MODE_NORMAL,
 170         }, /* VP6A -> VPROG6ACNT */
 171         {
 172                 .address = 0x6c,
 173                 .reg = 0xAA,
 174                 .bit = VR_MODE_NORMAL,
 175         }, /* VP6B -> VPROG6BCNT */
 176         {
 177                 .address = 0x70,
 178                 .reg = 0x36,
 179                 .bit = BIT(2),
 180         }, /* SDWN_N -> MODEMCTRL Bit 2 */
 181         {
 182                 .address = 0x74,
 183                 .reg = 0x36,
 184                 .bit = BIT(0),
 185         } /* MOFF -> MODEMCTRL Bit 0 */
 186 };
 187
 188 static struct pmic_table thermal_table[] = {
 189         {
 190                 .address = 0x00,
 191                 .reg = 0x4F39
 192         },
 193         {
 194                 .address = 0x04,
 195                 .reg = 0x4F24
 196         },
 197         {
 198                 .address = 0x08,
 199                 .reg = 0x4F26
 200         },
 201         {
 202                 .address = 0x0c,
 203                 .reg = 0x4F3B
 204         },
 205         {
 206                 .address = 0x10,
 207                 .reg = 0x4F28
 208         },
 209         {
 210                 .address = 0x14,
 211                 .reg = 0x4F2A
 212         },
 213         {
 214                 .address = 0x18,
 215                 .reg = 0x4F3D
 216         },
 217         {
 218                 .address = 0x1c,
 219                 .reg = 0x4F2C
 220         },
 221         {
 222                 .address = 0x20,
 223                 .reg = 0x4F2E
 224         },
 225         {
 226                 .address = 0x24,
 227                 .reg = 0x4F3F
 228         },
 229         {
 230                 .address = 0x28,
 231                 .reg = 0x4F30
 232         },
 233         {
 234                 .address = 0x30,
 235                 .reg = 0x4F41
 236         },
 237         {
 238                 .address = 0x34,
 239                 .reg = 0x4F32
 240         },
 241         {
 242                 .address = 0x3c,
 243                 .reg = 0x4F43
 244         },
 245         {
 246                 .address = 0x40,
 247                 .reg = 0x4F34
 248         },
 249         {
 250                 .address = 0x48,
 251                 .reg = 0x4F6A,
 252                 .bit = 0,
 253         },
 254         {
 255                 .address = 0x4C,
 256                 .reg = 0x4F6A,
 257                 .bit = 1
 258         },
 259         {
 260                 .address = 0x50,
 261                 .reg = 0x4F6A,
 262                 .bit = 2
 263         },
 264         {
 265                 .address = 0x54,
 266                 .reg = 0x4F6A,
 267                 .bit = 4
 268         },
 269         {
 270                 .address = 0x58,
 271                 .reg = 0x4F6A,
 272                 .bit = 5
 273         },
 274         {
 275                 .address = 0x5C,
 276                 .reg = 0x4F6A,
 277                 .bit = 3
 278         },
 279 };
 280
 281 static int intel_bxtwc_pmic_get_power(struct regmap *regmap, int reg,
 282                 int bit, u64 *value)
 283 {
 284         int data;
 285
 286         if (regmap_read(regmap, reg, &data))
 287                 return -EIO;
 288
 289         *value = (data & bit) ? 1 : 0;
 290         return 0;
 291 }
 292
 293 static int intel_bxtwc_pmic_update_power(struct regmap *regmap, int reg,
 294                 int bit, bool on)
 295 {
 296         u8 val, mask = bit;
 297
 298         if (on)
 299                 val = 0xFF;
 300         else
 301                 val = 0x0;
 302
 303         return regmap_update_bits(regmap, reg, mask, val);
 304 }
 305
 306 static int intel_bxtwc_pmic_get_raw_temp(struct regmap *regmap, int reg)
 307 {
 308         unsigned int val, adc_val, reg_val;
 309         u8 temp_l, temp_h, cursrc;
 310         unsigned long rlsb;
 311         static const unsigned long rlsb_array[] = {
 312                 0, 260420, 130210, 65100, 32550, 16280,
 313                 8140, 4070, 2030, 0, 260420, 130210 };
 314
 315         if (regmap_read(regmap, reg, &val))
 316                 return -EIO;
 317         temp_l = (u8) val;
 318
 319         if (regmap_read(regmap, (reg - 1), &val))
 320                 return -EIO;
 321         temp_h = (u8) val;
 322
 323         reg_val = temp_l | WHISKEY_COVE_ADC_HIGH_BIT(temp_h);
 324         cursrc = WHISKEY_COVE_ADC_CURSRC(temp_h);
 325         rlsb = rlsb_array[cursrc];
 326         adc_val = reg_val * rlsb / 1000;
 327
 328         return adc_val;
 329 }
 330
 331 static int
 332 intel_bxtwc_pmic_update_aux(struct regmap *regmap, int reg, int raw)
 333 {
 334         u32 bsr_num;
 335         u16 resi_val, count = 0, thrsh = 0;
 336         u8 alrt_h, alrt_l, cursel = 0;
 337
 338         bsr_num = raw;
 339         bsr_num /= (1 << 5);
 340
 341         count = fls(bsr_num) - 1;
 342
 343         cursel = clamp_t(s8, (count - 7), 0, 7);
 344         thrsh = raw / (1 << (4 + cursel));
 345
 346         resi_val = (cursel << 9) | thrsh;
 347         alrt_h = (resi_val >> 8) & WHISKEY_COVE_ALRT_HIGH_BIT_MASK;
 348         if (regmap_update_bits(regmap,
 349                                 reg - 1,
 350                                 WHISKEY_COVE_ALRT_HIGH_BIT_MASK,
 351                                 alrt_h))
 352                 return -EIO;
 353
 354         alrt_l = (u8)resi_val;
 355         return regmap_write(regmap, reg, alrt_l);
 356 }
 357
 358 static int
 359 intel_bxtwc_pmic_get_policy(struct regmap *regmap, int reg, int bit, u64 *value)
 360 {
 361         u8 mask = BIT(bit);
 362         unsigned int val;
 363
 364         if (regmap_read(regmap, reg, &val))
 365                 return -EIO;
 366
 367         *value = (val & mask) >> bit;
 368         return 0;
 369 }
 370
 371 static int
 372 intel_bxtwc_pmic_update_policy(struct regmap *regmap,
 373                                 int reg, int bit, int enable)
 374 {
 375         u8 mask = BIT(bit), val = enable << bit;
 376
 377         return regmap_update_bits(regmap, reg, mask, val);
 378 }
 379
 380 static struct intel_pmic_opregion_data intel_bxtwc_pmic_opregion_data = {
 381         .get_power      = intel_bxtwc_pmic_get_power,
 382         .update_power   = intel_bxtwc_pmic_update_power,
 383         .get_raw_temp   = intel_bxtwc_pmic_get_raw_temp,
 384         .update_aux     = intel_bxtwc_pmic_update_aux,
 385         .get_policy     = intel_bxtwc_pmic_get_policy,
 386         .update_policy  = intel_bxtwc_pmic_update_policy,
 387         .power_table      = power_table,
 388         .power_table_count = ARRAY_SIZE(power_table),
 389         .thermal_table     = thermal_table,
 390         .thermal_table_count = ARRAY_SIZE(thermal_table),
 391 };
 392
 393 static int intel_bxtwc_pmic_opregion_probe(struct platform_device *pdev)
 394 {
 395         struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
 396
 397         return intel_pmic_install_opregion_handler(&pdev->dev,
 398                         ACPI_HANDLE(pdev->dev.parent),
 399                         pmic->regmap,
 400                         &intel_bxtwc_pmic_opregion_data);
 401 }
 402
 403 static struct platform_device_id bxt_wc_opregion_id_table[] = {
 404         { .name = "bxt_wcove_region" },
 405         {},
 406 };
 407
 408 static struct platform_driver intel_bxtwc_pmic_opregion_driver = {
 409         .probe = intel_bxtwc_pmic_opregion_probe,
 410         .driver = {
 411                 .name = "bxt_whiskey_cove_pmic",
 412         },
 413         .id_table = bxt_wc_opregion_id_table,
 414 };
 415
 416 static int __init intel_bxtwc_pmic_opregion_driver_init(void)
 417 {
 418         return platform_driver_register(&intel_bxtwc_pmic_opregion_driver);
 419 }
 420 device_initcall(intel_bxtwc_pmic_opregion_driver_init);