linux/drivers/mfd/88pm805.c
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   1/*
   2 * Base driver for Marvell 88PM805
   3 *
   4 * Copyright (C) 2012 Marvell International Ltd.
   5 * Haojian Zhuang <haojian.zhuang@marvell.com>
   6 * Joseph(Yossi) Hanin <yhanin@marvell.com>
   7 * Qiao Zhou <zhouqiao@marvell.com>
   8 *
   9 * This file is subject to the terms and conditions of the GNU General
  10 * Public License. See the file "COPYING" in the main directory of this
  11 * archive for more details.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21 */
  22
  23#include <linux/kernel.h>
  24#include <linux/module.h>
  25#include <linux/i2c.h>
  26#include <linux/irq.h>
  27#include <linux/mfd/core.h>
  28#include <linux/mfd/88pm80x.h>
  29#include <linux/slab.h>
  30#include <linux/delay.h>
  31
  32static const struct i2c_device_id pm80x_id_table[] = {
  33        {"88PM805", 0},
  34        {} /* NULL terminated */
  35};
  36MODULE_DEVICE_TABLE(i2c, pm80x_id_table);
  37
  38/* Interrupt Number in 88PM805 */
  39enum {
  40        PM805_IRQ_LDO_OFF,      /*0 */
  41        PM805_IRQ_SRC_DPLL_LOCK,        /*1 */
  42        PM805_IRQ_CLIP_FAULT,
  43        PM805_IRQ_MIC_CONFLICT,
  44        PM805_IRQ_HP2_SHRT,
  45        PM805_IRQ_HP1_SHRT,     /*5 */
  46        PM805_IRQ_FINE_PLL_FAULT,
  47        PM805_IRQ_RAW_PLL_FAULT,
  48        PM805_IRQ_VOLP_BTN_DET,
  49        PM805_IRQ_VOLM_BTN_DET,
  50        PM805_IRQ_SHRT_BTN_DET, /*10 */
  51        PM805_IRQ_MIC_DET,      /*11 */
  52
  53        PM805_MAX_IRQ,
  54};
  55
  56static struct resource codec_resources[] = {
  57        {
  58         /* Headset microphone insertion or removal */
  59         .name = "micin",
  60         .start = PM805_IRQ_MIC_DET,
  61         .end = PM805_IRQ_MIC_DET,
  62         .flags = IORESOURCE_IRQ,
  63         },
  64        {
  65         /* Audio short HP1 */
  66         .name = "audio-short1",
  67         .start = PM805_IRQ_HP1_SHRT,
  68         .end = PM805_IRQ_HP1_SHRT,
  69         .flags = IORESOURCE_IRQ,
  70         },
  71        {
  72         /* Audio short HP2 */
  73         .name = "audio-short2",
  74         .start = PM805_IRQ_HP2_SHRT,
  75         .end = PM805_IRQ_HP2_SHRT,
  76         .flags = IORESOURCE_IRQ,
  77         },
  78};
  79
  80static struct mfd_cell codec_devs[] = {
  81        {
  82         .name = "88pm80x-codec",
  83         .num_resources = ARRAY_SIZE(codec_resources),
  84         .resources = &codec_resources[0],
  85         .id = -1,
  86         },
  87};
  88
  89static struct regmap_irq pm805_irqs[] = {
  90        /* INT0 */
  91        [PM805_IRQ_LDO_OFF] = {
  92                .mask = PM805_INT1_HP1_SHRT,
  93        },
  94        [PM805_IRQ_SRC_DPLL_LOCK] = {
  95                .mask = PM805_INT1_HP2_SHRT,
  96        },
  97        [PM805_IRQ_CLIP_FAULT] = {
  98                .mask = PM805_INT1_MIC_CONFLICT,
  99        },
 100        [PM805_IRQ_MIC_CONFLICT] = {
 101                .mask = PM805_INT1_CLIP_FAULT,
 102        },
 103        [PM805_IRQ_HP2_SHRT] = {
 104                .mask = PM805_INT1_LDO_OFF,
 105        },
 106        [PM805_IRQ_HP1_SHRT] = {
 107                .mask = PM805_INT1_SRC_DPLL_LOCK,
 108        },
 109        /* INT1 */
 110        [PM805_IRQ_FINE_PLL_FAULT] = {
 111                .reg_offset = 1,
 112                .mask = PM805_INT2_MIC_DET,
 113        },
 114        [PM805_IRQ_RAW_PLL_FAULT] = {
 115                .reg_offset = 1,
 116                .mask = PM805_INT2_SHRT_BTN_DET,
 117        },
 118        [PM805_IRQ_VOLP_BTN_DET] = {
 119                .reg_offset = 1,
 120                .mask = PM805_INT2_VOLM_BTN_DET,
 121        },
 122        [PM805_IRQ_VOLM_BTN_DET] = {
 123                .reg_offset = 1,
 124                .mask = PM805_INT2_VOLP_BTN_DET,
 125        },
 126        [PM805_IRQ_SHRT_BTN_DET] = {
 127                .reg_offset = 1,
 128                .mask = PM805_INT2_RAW_PLL_FAULT,
 129        },
 130        [PM805_IRQ_MIC_DET] = {
 131                .reg_offset = 1,
 132                .mask = PM805_INT2_FINE_PLL_FAULT,
 133        },
 134};
 135
 136static int device_irq_init_805(struct pm80x_chip *chip)
 137{
 138        struct regmap *map = chip->regmap;
 139        unsigned long flags = IRQF_ONESHOT;
 140        int data, mask, ret = -EINVAL;
 141
 142        if (!map || !chip->irq) {
 143                dev_err(chip->dev, "incorrect parameters\n");
 144                return -EINVAL;
 145        }
 146
 147        /*
 148         * irq_mode defines the way of clearing interrupt. it's read-clear by
 149         * default.
 150         */
 151        mask =
 152            PM805_STATUS0_INT_CLEAR | PM805_STATUS0_INV_INT |
 153            PM800_STATUS0_INT_MASK;
 154
 155        data = PM805_STATUS0_INT_CLEAR;
 156        ret = regmap_update_bits(map, PM805_INT_STATUS0, mask, data);
 157        /*
 158         * PM805_INT_STATUS is under 32K clock domain, so need to
 159         * add proper delay before the next I2C register access.
 160         */
 161        msleep(1);
 162
 163        if (ret < 0)
 164                goto out;
 165
 166        ret =
 167            regmap_add_irq_chip(chip->regmap, chip->irq, flags, -1,
 168                                chip->regmap_irq_chip, &chip->irq_data);
 169
 170out:
 171        return ret;
 172}
 173
 174static void device_irq_exit_805(struct pm80x_chip *chip)
 175{
 176        regmap_del_irq_chip(chip->irq, chip->irq_data);
 177}
 178
 179static struct regmap_irq_chip pm805_irq_chip = {
 180        .name = "88pm805",
 181        .irqs = pm805_irqs,
 182        .num_irqs = ARRAY_SIZE(pm805_irqs),
 183
 184        .num_regs = 2,
 185        .status_base = PM805_INT_STATUS1,
 186        .mask_base = PM805_INT_MASK1,
 187        .ack_base = PM805_INT_STATUS1,
 188};
 189
 190static int device_805_init(struct pm80x_chip *chip)
 191{
 192        int ret = 0;
 193        struct regmap *map = chip->regmap;
 194
 195        if (!map) {
 196                dev_err(chip->dev, "regmap is invalid\n");
 197                return -EINVAL;
 198        }
 199
 200        chip->regmap_irq_chip = &pm805_irq_chip;
 201
 202        ret = device_irq_init_805(chip);
 203        if (ret < 0) {
 204                dev_err(chip->dev, "Failed to init pm805 irq!\n");
 205                goto out_irq_init;
 206        }
 207
 208        ret = mfd_add_devices(chip->dev, 0, &codec_devs[0],
 209                              ARRAY_SIZE(codec_devs), &codec_resources[0], 0,
 210                              NULL);
 211        if (ret < 0) {
 212                dev_err(chip->dev, "Failed to add codec subdev\n");
 213                goto out_codec;
 214        } else
 215                dev_info(chip->dev, "[%s]:Added mfd codec_devs\n", __func__);
 216
 217        return 0;
 218
 219out_codec:
 220        device_irq_exit_805(chip);
 221out_irq_init:
 222        return ret;
 223}
 224
 225static int pm805_probe(struct i2c_client *client,
 226                                 const struct i2c_device_id *id)
 227{
 228        int ret = 0;
 229        struct pm80x_chip *chip;
 230        struct pm80x_platform_data *pdata = client->dev.platform_data;
 231
 232        ret = pm80x_init(client);
 233        if (ret) {
 234                dev_err(&client->dev, "pm805_init fail!\n");
 235                goto out_init;
 236        }
 237
 238        chip = i2c_get_clientdata(client);
 239
 240        ret = device_805_init(chip);
 241        if (ret) {
 242                dev_err(chip->dev, "Failed to initialize 88pm805 devices\n");
 243                goto err_805_init;
 244        }
 245
 246        if (pdata->plat_config)
 247                pdata->plat_config(chip, pdata);
 248
 249err_805_init:
 250        pm80x_deinit();
 251out_init:
 252        return ret;
 253}
 254
 255static int pm805_remove(struct i2c_client *client)
 256{
 257        struct pm80x_chip *chip = i2c_get_clientdata(client);
 258
 259        mfd_remove_devices(chip->dev);
 260        device_irq_exit_805(chip);
 261
 262        pm80x_deinit();
 263
 264        return 0;
 265}
 266
 267static struct i2c_driver pm805_driver = {
 268        .driver = {
 269                .name = "88PM805",
 270                .owner = THIS_MODULE,
 271                .pm = &pm80x_pm_ops,
 272                },
 273        .probe = pm805_probe,
 274        .remove = pm805_remove,
 275        .id_table = pm80x_id_table,
 276};
 277
 278static int __init pm805_i2c_init(void)
 279{
 280        return i2c_add_driver(&pm805_driver);
 281}
 282subsys_initcall(pm805_i2c_init);
 283
 284static void __exit pm805_i2c_exit(void)
 285{
 286        i2c_del_driver(&pm805_driver);
 287}
 288module_exit(pm805_i2c_exit);
 289
 290MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM805");
 291MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
 292MODULE_LICENSE("GPL");
 293
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