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mx37_3stack_pmic_wm8350.c

/*
 * mx37-3stack-pmic-wm8350.c  --  i.MX37 3STACK Driver for Wolfson WM8350 PMIC
 *
 * Copyright 2007 Wolfson Microelectronics PLC.
 * Copyright 2008-2009 Freescale Semiconductor Inc.
 *
 * Author: Liam Girdwood
 *         liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/wm8350/audio.h>
#include <linux/mfd/wm8350/core.h>
#include <linux/mfd/wm8350/pmic.h>
#include <linux/mfd/wm8350/gpio.h>
#include <linux/mfd/wm8350/bl.h>
#include <mach/irqs.h>

#include "iomux.h"

/* CPU */
static struct regulator_consumer_supply dcdc1_consumers[] = {
      {
       .supply = "cpu_vcc",
       }
};

static struct regulator_consumer_supply dcdc3_consumers[] = {
      {
       .supply = "AVDD",
       .dev_name = "1-001a",
       },
      {
       .supply = "HPVDD",
       .dev_name = "1-001a",
       },
};

static struct regulator_init_data dcdc1_data = {
      .constraints = {
                  .name = "DCDC1",
                  .min_uV = 850000,
                  .max_uV = 1200000,
                  .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
                  REGULATOR_CHANGE_MODE,
                  .valid_modes_mask = REGULATOR_MODE_FAST,
                  .state_mem = {
                              .uV = 1050000,
                              .mode = REGULATOR_MODE_NORMAL,
                              .enabled = 1,
                              },
                  .initial_state = PM_SUSPEND_MEM,
                  .always_on = 1,
                  .boot_on = 1,
                  },
      .num_consumer_supplies = ARRAY_SIZE(dcdc1_consumers),
      .consumer_supplies = dcdc1_consumers,
};

/* MX37 LP */
static struct regulator_init_data dcdc4_data = {
      .constraints = {
                  .name = "DCDC4",
                  .min_uV = 1000000,
                  .max_uV = 1250000,
                  .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
                  REGULATOR_CHANGE_MODE,
                  .valid_modes_mask = REGULATOR_MODE_NORMAL |
                  REGULATOR_MODE_FAST,
                  .state_mem = {
                              .uV = 1250000,
                              .mode = REGULATOR_MODE_NORMAL,
                              .enabled = 1,
                              },
                  .initial_state = PM_SUSPEND_MEM,
                  .always_on = 1,
                  .boot_on = 1,
                  },
};

/* DDR RAM */
static struct regulator_init_data dcdc6_data = {
      .constraints = {
                  .name = "DCDC6",
                  .min_uV = 1800000,
                  .max_uV = 1800000,
                  .valid_modes_mask = REGULATOR_MODE_NORMAL,
                  .state_mem = {
                              .uV = 1800000,
                              .mode = REGULATOR_MODE_NORMAL,
                              .enabled = 1,
                              },
                  .state_disk = {
                               .mode = REGULATOR_MODE_NORMAL,
                               .enabled = 0,
                               },
                  .always_on = 1,
                  .boot_on = 1,
                  .initial_state = PM_SUSPEND_MEM,
                  },
};

static struct regulator_init_data dcdc3_data = {
      .constraints = {
                  .name = "DCDC3",
                  .min_uV = 3300000,
                  .max_uV = 3300000,
                  .valid_modes_mask = REGULATOR_MODE_NORMAL,
                  .apply_uV = 1,
                  },
      .num_consumer_supplies = ARRAY_SIZE(dcdc3_consumers),
      .consumer_supplies = dcdc3_consumers,
};

static struct regulator_init_data ldo1_data = {
      .constraints = {
                  .name = "LDO1",
                  .min_uV = 2800000,
                  .max_uV = 2800000,
                  .valid_modes_mask = REGULATOR_MODE_NORMAL,
                  .apply_uV = 1,
                  .always_on = 1,
                  .boot_on = 1,
                  },
};

static struct regulator_init_data ldo2_data = {
      .constraints = {
                  .name = "LDO2",
                  .min_uV = 2500000,
                  .max_uV = 2500000,
                  .valid_modes_mask = REGULATOR_MODE_NORMAL,
                  .apply_uV = 1,
                  .always_on = 1,
                  .boot_on = 1,
                  },
};

static struct regulator_init_data ldo3_data = {
      .constraints = {
                  .name = "LDO3",
                  .min_uV = 1200000,
                  .max_uV = 1200000,
                  .valid_modes_mask = REGULATOR_MODE_NORMAL,
                  .apply_uV = 1,
                  .always_on = 1,
                  .boot_on = 1,
                  },
};

static struct regulator_init_data ldo4_data = {
      .constraints = {
                  .name = "LDO4",
                  .min_uV = 1800000,
                  .max_uV = 1800000,
                  .valid_modes_mask = REGULATOR_MODE_NORMAL,
                  .apply_uV = 1,
                  .always_on = 1,
                  .boot_on = 1,
                  },
};

static struct regulator_init_data isinka_data = {
      .constraints = {
                  .name = "ISINKA",
                  .min_uA = 0,
                  .max_uA = 225000,
                  .valid_ops_mask = REGULATOR_CHANGE_CURRENT,
                  .valid_modes_mask = REGULATOR_MODE_NORMAL,
                  },
};

static struct regulator_init_data dcdc5_data = {
      .constraints = {
                  .name = "DCDC5",
                  .min_uV = 0,
                  .max_uV = 5000000,
                  .valid_modes_mask = REGULATOR_MODE_NORMAL,
                  },
};

static struct regulator_init_data dcdc2_data = {
      .constraints = {
                  .name = "DCDC2",
                  .min_uV = 0,
                  .max_uV = 5000000,
                  .valid_modes_mask = REGULATOR_MODE_NORMAL,
                  },
};

static void wm8350_nop_release(struct device *dev)
{
      /* Nothing */
}

static int wm8350_check_fb(struct fb_info *info)
{
      return (to_platform_device(info->device)->id == 0);
}

struct wm8350_bl_platform_data wm8350_bl_data = {
      .isink = WM8350_ISINK_A,
      .dcdc = WM8350_DCDC_5,
      .voltage_ramp = WM8350_DC5_RMP_20V,
      .retries = 5,
      .max_brightness = 63,
      .power = FB_BLANK_UNBLANK,
      .brightness = 50,
      .check_fb = wm8350_check_fb,
};

static struct platform_device mxc_wm8350_devices[] = {
      {
       .name = "wm8350-bl",
       .id = 2,
       .dev = {
             .release = wm8350_nop_release,
             .platform_data = &wm8350_bl_data,
             },
       },
};

static struct wm8350_audio_platform_data imx_3stack_wm8350_setup = {
      .vmid_discharge_msecs = 1000,
      .drain_msecs = 30,
      .cap_discharge_msecs = 700,
      .vmid_charge_msecs = 700,
      .vmid_s_curve = WM8350_S_CURVE_SLOW,
      .dis_out4 = WM8350_DISCHARGE_SLOW,
      .dis_out3 = WM8350_DISCHARGE_SLOW,
      .dis_out2 = WM8350_DISCHARGE_SLOW,
      .dis_out1 = WM8350_DISCHARGE_SLOW,
      .vroi_out4 = WM8350_TIE_OFF_500R,
      .vroi_out3 = WM8350_TIE_OFF_500R,
      .vroi_out2 = WM8350_TIE_OFF_500R,
      .vroi_out1 = WM8350_TIE_OFF_500R,
      .vroi_enable = 0,
      .codec_current_on = WM8350_CODEC_ISEL_1_0,
      .codec_current_standby = WM8350_CODEC_ISEL_0_5,
      .codec_current_charge = WM8350_CODEC_ISEL_1_5,
};

struct mxc_audio_platform_data imx_3stack_audio_platform_data = {
      .ssi_num = 2,
      .src_port = 2,
      .ext_port = 5,
};

static struct platform_device *imx_snd_device;

static int mx37_wm8350_init(struct wm8350 *wm8350)
{
      int i, ret;

      for (i = 0; i < ARRAY_SIZE(mxc_wm8350_devices); i++) {
            if (platform_device_register(&mxc_wm8350_devices[i]) < 0)
                  dev_err(&mxc_wm8350_devices[i].dev,
                        "Unable to register WM8350 device\n");
      }

      wm8350->pmic.isink_A_dcdc = WM8350_DCDC_5;

      /*Note: Needs to be moved into a regulator function. */
      /* Configuring -- GPIO 7 pin */
      if (wm8350_gpio_config(wm8350, 7, WM8350_GPIO_DIR_OUT, 0,
                         WM8350_GPIO_ACTIVE_LOW, WM8350_GPIO_PULL_NONE,
                         WM8350_GPIO_INVERT_OFF,
                         WM8350_GPIO_DEBOUNCE_OFF) == 0)
            wm8350_set_bits(wm8350, WM8350_GPIO_PIN_STATUS, 1 << 7);
      else
            printk(KERN_ERR "Error in setting Wolfson GPIO pin 7 \n");
      /* enable gpio4:USB_VBUS_EN */
      ret =
          wm8350_gpio_config(wm8350, 4, WM8350_GPIO_DIR_IN,
                         WM8350_GPIO4_MR_IN, WM8350_GPIO_ACTIVE_HIGH,
                         WM8350_GPIO_PULL_UP, WM8350_GPIO_INVERT_OFF,
                         WM8350_GPIO_DEBOUNCE_OFF);
      if (ret)
            printk(KERN_ERR "Error in setting USB VBUS enable pin\n");

      wm8350_register_regulator(wm8350, WM8350_DCDC_1, &dcdc1_data);
      wm8350_register_regulator(wm8350, WM8350_DCDC_2, &dcdc2_data);
      wm8350_register_regulator(wm8350, WM8350_DCDC_3, &dcdc3_data);
      wm8350_register_regulator(wm8350, WM8350_DCDC_4, &dcdc4_data);
      wm8350_register_regulator(wm8350, WM8350_DCDC_5, &dcdc5_data);
      wm8350_register_regulator(wm8350, WM8350_DCDC_6, &dcdc6_data);
      wm8350_register_regulator(wm8350, WM8350_LDO_1, &ldo1_data);
      wm8350_register_regulator(wm8350, WM8350_LDO_2, &ldo2_data);
      wm8350_register_regulator(wm8350, WM8350_LDO_3, &ldo3_data);
      wm8350_register_regulator(wm8350, WM8350_LDO_4, &ldo4_data);
      wm8350_register_regulator(wm8350, WM8350_ISINK_A, &isinka_data);

      /* register sound */
      pr_info("Registering imx37_snd_device");
      wm8350->codec.platform_data = &imx_3stack_wm8350_setup;

      imx_snd_device = platform_device_alloc("wm8350-imx-3stack-audio", -1);
      if (!imx_snd_device) {
            ret = -ENOMEM;
            goto err;
      }
      imx_3stack_audio_platform_data.priv = wm8350;

      imx_snd_device->dev.platform_data = &imx_3stack_audio_platform_data;
      ret = platform_device_add(imx_snd_device);
      if (ret)
            goto snd_err;

      return 0;

snd_err:
      platform_device_put(imx_snd_device);

err:
      kfree(wm8350->reg_cache);
      return ret;
}

struct wm8350_platform_data __initdata mx37_wm8350_pdata = {
      .init = mx37_wm8350_init,
};

static struct i2c_board_info __initdata wm8350_i2c_device = {
      I2C_BOARD_INFO("wm8350", 0x1a),
      .platform_data = &mx37_wm8350_pdata,
      .irq = IOMUX_TO_IRQ(MX37_PIN_GPIO1_4),
};

static __init int mxc_init_i2c(void)
{
      i2c_register_board_info(1, &wm8350_i2c_device, 1);
      return 0;
}

subsys_initcall(mxc_init_i2c);

static __init int wm8350_regulator_init(void)
{
      int i = 0;
      int ret = 0;
      struct regulator *regulator;
      char *wm8350_global_regulator[] = {
            "DCDC1",
            "DCDC3",
            "DCDC4",
            "DCDC6",
            "LDO3",
      };

      /* for board v2.0 later, do nothing here */
      if (board_is_rev(BOARD_REV_2))
            return 0;
      while ((i < ARRAY_SIZE(wm8350_global_regulator)) &&
            !IS_ERR_VALUE(
                  (unsigned long)(regulator =
                              regulator_get(NULL,
                                    wm8350_global_regulator
                                    [i])))) {
            regulator_enable(regulator);
            if (strcmp(wm8350_global_regulator[i], "DCDC4") == 0)
                  ret =
                      regulator_set_voltage(regulator, 1250000, 1250000);
            else if (strcmp(wm8350_global_regulator[i], "DCDC1") == 0) {
                  ret =
                      regulator_set_voltage(regulator, 1050000, 1050000);
                  regulator_set_mode(regulator, REGULATOR_MODE_FAST);
            }
            i++;
      }
      return ret;
}

late_initcall(wm8350_regulator_init);

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