88pm805.c

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/*
 * Base driver for Marvell 88PM805
 *
 * Copyright (C) 2012 Marvell International Ltd.
 * Haojian Zhuang <[email protected]>
 * Joseph(Yossi) Hanin <[email protected]>
 * Qiao Zhou <[email protected]>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License. See the file "COPYING" in the main directory of this
 * archive for more details.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/mfd/core.h>
#include <linux/mfd/88pm80x.h>
#include <linux/slab.h>
#include <linux/delay.h>

#define PM805_CHIP_ID           (0x00)

static const struct i2c_device_id pm80x_id_table[] = {
    {"88PM805", CHIP_PM805},
    {} /* NULL terminated */
};
MODULE_DEVICE_TABLE(i2c, pm80x_id_table);

/* Interrupt Number in 88PM805 */
enum {
    PM805_IRQ_LDO_OFF,  /*0 */
    PM805_IRQ_SRC_DPLL_LOCK,    /*1 */
    PM805_IRQ_CLIP_FAULT,
    PM805_IRQ_MIC_CONFLICT,
    PM805_IRQ_HP2_SHRT,
    PM805_IRQ_HP1_SHRT, /*5 */
    PM805_IRQ_FINE_PLL_FAULT,
    PM805_IRQ_RAW_PLL_FAULT,
    PM805_IRQ_VOLP_BTN_DET,
    PM805_IRQ_VOLM_BTN_DET,
    PM805_IRQ_SHRT_BTN_DET, /*10 */
    PM805_IRQ_MIC_DET,  /*11 */

    PM805_MAX_IRQ,
};

static struct resource codec_resources[] = {
    {
     /* Headset microphone insertion or removal */
     .name = "micin",
     .start = PM805_IRQ_MIC_DET,
     .end = PM805_IRQ_MIC_DET,
     .flags = IORESOURCE_IRQ,
     },
    {
     /* Audio short HP1 */
     .name = "audio-short1",
     .start = PM805_IRQ_HP1_SHRT,
     .end = PM805_IRQ_HP1_SHRT,
     .flags = IORESOURCE_IRQ,
     },
    {
     /* Audio short HP2 */
     .name = "audio-short2",
     .start = PM805_IRQ_HP2_SHRT,
     .end = PM805_IRQ_HP2_SHRT,
     .flags = IORESOURCE_IRQ,
     },
};

static struct mfd_cell codec_devs[] = {
    {
     .name = "88pm80x-codec",
     .num_resources = ARRAY_SIZE(codec_resources),
     .resources = &codec_resources[0],
     .id = -1,
     },
};

static struct regmap_irq pm805_irqs[] = {
    /* INT0 */
    [PM805_IRQ_LDO_OFF] = {
        .mask = PM805_INT1_HP1_SHRT,
    },
    [PM805_IRQ_SRC_DPLL_LOCK] = {
        .mask = PM805_INT1_HP2_SHRT,
    },
    [PM805_IRQ_CLIP_FAULT] = {
        .mask = PM805_INT1_MIC_CONFLICT,
    },
    [PM805_IRQ_MIC_CONFLICT] = {
        .mask = PM805_INT1_CLIP_FAULT,
    },
    [PM805_IRQ_HP2_SHRT] = {
        .mask = PM805_INT1_LDO_OFF,
    },
    [PM805_IRQ_HP1_SHRT] = {
        .mask = PM805_INT1_SRC_DPLL_LOCK,
    },
    /* INT1 */
    [PM805_IRQ_FINE_PLL_FAULT] = {
        .reg_offset = 1,
        .mask = PM805_INT2_MIC_DET,
    },
    [PM805_IRQ_RAW_PLL_FAULT] = {
        .reg_offset = 1,
        .mask = PM805_INT2_SHRT_BTN_DET,
    },
    [PM805_IRQ_VOLP_BTN_DET] = {
        .reg_offset = 1,
        .mask = PM805_INT2_VOLM_BTN_DET,
    },
    [PM805_IRQ_VOLM_BTN_DET] = {
        .reg_offset = 1,
        .mask = PM805_INT2_VOLP_BTN_DET,
    },
    [PM805_IRQ_SHRT_BTN_DET] = {
        .reg_offset = 1,
        .mask = PM805_INT2_RAW_PLL_FAULT,
    },
    [PM805_IRQ_MIC_DET] = {
        .reg_offset = 1,
        .mask = PM805_INT2_FINE_PLL_FAULT,
    },
};

static int __devinit device_irq_init_805(struct pm80x_chip *chip)
{
    struct regmap *map = chip->regmap;
    unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
    int data, mask, ret = -EINVAL;

    if (!map || !chip->irq) {
        dev_err(chip->dev, "incorrect parameters\n");
        return -EINVAL;
    }

    /*
     * irq_mode defines the way of clearing interrupt. it's read-clear by
     * default.
     */
    mask =
        PM805_STATUS0_INT_CLEAR | PM805_STATUS0_INV_INT |
        PM800_STATUS0_INT_MASK;

    data = PM805_STATUS0_INT_CLEAR;
    ret = regmap_update_bits(map, PM805_INT_STATUS0, mask, data);
    /*
     * PM805_INT_STATUS is under 32K clock domain, so need to
     * add proper delay before the next I2C register access.
     */
    msleep(1);

    if (ret < 0)
        goto out;

    ret =
        regmap_add_irq_chip(chip->regmap, chip->irq, flags, -1,
                chip->regmap_irq_chip, &chip->irq_data);

out:
    return ret;
}

static void device_irq_exit_805(struct pm80x_chip *chip)
{
    regmap_del_irq_chip(chip->irq, chip->irq_data);
}

static struct regmap_irq_chip pm805_irq_chip = {
    .name = "88pm805",
    .irqs = pm805_irqs,
    .num_irqs = ARRAY_SIZE(pm805_irqs),

    .num_regs = 2,
    .status_base = PM805_INT_STATUS1,
    .mask_base = PM805_INT_MASK1,
    .ack_base = PM805_INT_STATUS1,
};

static int __devinit device_805_init(struct pm80x_chip *chip)
{
    int ret = 0;
    unsigned int val;
    struct regmap *map = chip->regmap;

    if (!map) {
        dev_err(chip->dev, "regmap is invalid\n");
        return -EINVAL;
    }

    ret = regmap_read(map, PM805_CHIP_ID, &val);
    if (ret < 0) {
        dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
        goto out_irq_init;
    }
    chip->version = val;

    chip->regmap_irq_chip = &pm805_irq_chip;

    ret = device_irq_init_805(chip);
    if (ret < 0) {
        dev_err(chip->dev, "Failed to init pm805 irq!\n");
        goto out_irq_init;
    }

    ret = mfd_add_devices(chip->dev, 0, &codec_devs[0],
                  ARRAY_SIZE(codec_devs), &codec_resources[0], 0,
                  NULL);
    if (ret < 0) {
        dev_err(chip->dev, "Failed to add codec subdev\n");
        goto out_codec;
    } else
        dev_info(chip->dev, "[%s]:Added mfd codec_devs\n", __func__);

    return 0;

out_codec:
    device_irq_exit_805(chip);
out_irq_init:
    return ret;
}

static int __devinit pm805_probe(struct i2c_client *client,
                 const struct i2c_device_id *id)
{
    int ret = 0;
    struct pm80x_chip *chip;
    struct pm80x_platform_data *pdata = client->dev.platform_data;

    ret = pm80x_init(client, id);
    if (ret) {
        dev_err(&client->dev, "pm805_init fail!\n");
        goto out_init;
    }

    chip = i2c_get_clientdata(client);

    ret = device_805_init(chip);
    if (ret) {
        dev_err(chip->dev, "%s id 0x%x failed!\n", __func__, chip->id);
        goto err_805_init;
    }

    if (pdata->plat_config)
        pdata->plat_config(chip, pdata);

err_805_init:
    pm80x_deinit(client);
out_init:
    return ret;
}

static int __devexit pm805_remove(struct i2c_client *client)
{
    struct pm80x_chip *chip = i2c_get_clientdata(client);

    mfd_remove_devices(chip->dev);
    device_irq_exit_805(chip);

    pm80x_deinit(client);

    return 0;
}

static struct i2c_driver pm805_driver = {
    .driver = {
        .name = "88PM80X",
        .owner = THIS_MODULE,
        .pm = &pm80x_pm_ops,
        },
    .probe = pm805_probe,
    .remove = __devexit_p(pm805_remove),
    .id_table = pm80x_id_table,
};

static int __init pm805_i2c_init(void)
{
    return i2c_add_driver(&pm805_driver);
}
subsys_initcall(pm805_i2c_init);

static void __exit pm805_i2c_exit(void)
{
    i2c_del_driver(&pm805_driver);
}
module_exit(pm805_i2c_exit);

MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM805");
MODULE_AUTHOR("Qiao Zhou <[email protected]>");
MODULE_LICENSE("GPL");