drivers/mfd/88pm805.c

   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
  32 #define PM805_CHIP_ID                   (0x00)
  33
  34 static const struct i2c_device_id pm80x_id_table[] = {
  35         {"88PM805", CHIP_PM805},
  36         {} /* NULL terminated */
  37 };
  38 MODULE_DEVICE_TABLE(i2c, pm80x_id_table);
  39
  40 /* Interrupt Number in 88PM805 */
  41 enum {
  42         PM805_IRQ_LDO_OFF,      /*0 */
  43         PM805_IRQ_SRC_DPLL_LOCK,        /*1 */
  44         PM805_IRQ_CLIP_FAULT,
  45         PM805_IRQ_MIC_CONFLICT,
  46         PM805_IRQ_HP2_SHRT,
  47         PM805_IRQ_HP1_SHRT,     /*5 */
  48         PM805_IRQ_FINE_PLL_FAULT,
  49         PM805_IRQ_RAW_PLL_FAULT,
  50         PM805_IRQ_VOLP_BTN_DET,
  51         PM805_IRQ_VOLM_BTN_DET,
  52         PM805_IRQ_SHRT_BTN_DET, /*10 */
  53         PM805_IRQ_MIC_DET,      /*11 */
  54
  55         PM805_MAX_IRQ,
  56 };
  57
  58 static struct resource codec_resources[] = {
  59         {
  60          /* Headset microphone insertion or removal */
  61          .name = "micin",
  62          .start = PM805_IRQ_MIC_DET,
  63          .end = PM805_IRQ_MIC_DET,
  64          .flags = IORESOURCE_IRQ,
  65          },
  66         {
  67          /* Audio short HP1 */
  68          .name = "audio-short1",
  69          .start = PM805_IRQ_HP1_SHRT,
  70          .end = PM805_IRQ_HP1_SHRT,
  71          .flags = IORESOURCE_IRQ,
  72          },
  73         {
  74          /* Audio short HP2 */
  75          .name = "audio-short2",
  76          .start = PM805_IRQ_HP2_SHRT,
  77          .end = PM805_IRQ_HP2_SHRT,
  78          .flags = IORESOURCE_IRQ,
  79          },
  80 };
  81
  82 static struct mfd_cell codec_devs[] = {
  83         {
  84          .name = "88pm80x-codec",
  85          .num_resources = ARRAY_SIZE(codec_resources),
  86          .resources = &codec_resources[0],
  87          .id = -1,
  88          },
  89 };
  90
  91 static struct regmap_irq pm805_irqs[] = {
  92         /* INT0 */
  93         [PM805_IRQ_LDO_OFF] = {
  94                 .mask = PM805_INT1_HP1_SHRT,
  95         },
  96         [PM805_IRQ_SRC_DPLL_LOCK] = {
  97                 .mask = PM805_INT1_HP2_SHRT,
  98         },
  99         [PM805_IRQ_CLIP_FAULT] = {
 100                 .mask = PM805_INT1_MIC_CONFLICT,
 101         },
 102         [PM805_IRQ_MIC_CONFLICT] = {
 103                 .mask = PM805_INT1_CLIP_FAULT,
 104         },
 105         [PM805_IRQ_HP2_SHRT] = {
 106                 .mask = PM805_INT1_LDO_OFF,
 107         },
 108         [PM805_IRQ_HP1_SHRT] = {
 109                 .mask = PM805_INT1_SRC_DPLL_LOCK,
 110         },
 111         /* INT1 */
 112         [PM805_IRQ_FINE_PLL_FAULT] = {
 113                 .reg_offset = 1,
 114                 .mask = PM805_INT2_MIC_DET,
 115         },
 116         [PM805_IRQ_RAW_PLL_FAULT] = {
 117                 .reg_offset = 1,
 118                 .mask = PM805_INT2_SHRT_BTN_DET,
 119         },
 120         [PM805_IRQ_VOLP_BTN_DET] = {
 121                 .reg_offset = 1,
 122                 .mask = PM805_INT2_VOLM_BTN_DET,
 123         },
 124         [PM805_IRQ_VOLM_BTN_DET] = {
 125                 .reg_offset = 1,
 126                 .mask = PM805_INT2_VOLP_BTN_DET,
 127         },
 128         [PM805_IRQ_SHRT_BTN_DET] = {
 129                 .reg_offset = 1,
 130                 .mask = PM805_INT2_RAW_PLL_FAULT,
 131         },
 132         [PM805_IRQ_MIC_DET] = {
 133                 .reg_offset = 1,
 134                 .mask = PM805_INT2_FINE_PLL_FAULT,
 135         },
 136 };
 137
 138 static int device_irq_init_805(struct pm80x_chip *chip)
 139 {
 140         struct regmap *map = chip->regmap;
 141         unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
 142         int data, mask, ret = -EINVAL;
 143
 144         if (!map || !chip->irq) {
 145                 dev_err(chip->dev, "incorrect parameters\n");
 146                 return -EINVAL;
 147         }
 148
 149         /*
 150          * irq_mode defines the way of clearing interrupt. it's read-clear by
 151          * default.
 152          */
 153         mask =
 154             PM805_STATUS0_INT_CLEAR | PM805_STATUS0_INV_INT |
 155             PM800_STATUS0_INT_MASK;
 156
 157         data = PM805_STATUS0_INT_CLEAR;
 158         ret = regmap_update_bits(map, PM805_INT_STATUS0, mask, data);
 159         /*
 160          * PM805_INT_STATUS is under 32K clock domain, so need to
 161          * add proper delay before the next I2C register access.
 162          */
 163         msleep(1);
 164
 165         if (ret < 0)
 166                 goto out;
 167
 168         ret =
 169             regmap_add_irq_chip(chip->regmap, chip->irq, flags, -1,
 170                                 chip->regmap_irq_chip, &chip->irq_data);
 171
 172 out:
 173         return ret;
 174 }
 175
 176 static void device_irq_exit_805(struct pm80x_chip *chip)
 177 {
 178         regmap_del_irq_chip(chip->irq, chip->irq_data);
 179 }
 180
 181 static struct regmap_irq_chip pm805_irq_chip = {
 182         .name = "88pm805",
 183         .irqs = pm805_irqs,
 184         .num_irqs = ARRAY_SIZE(pm805_irqs),
 185
 186         .num_regs = 2,
 187         .status_base = PM805_INT_STATUS1,
 188         .mask_base = PM805_INT_MASK1,
 189         .ack_base = PM805_INT_STATUS1,
 190 };
 191
 192 static int device_805_init(struct pm80x_chip *chip)
 193 {
 194         int ret = 0;
 195         unsigned int val;
 196         struct regmap *map = chip->regmap;
 197
 198         if (!map) {
 199                 dev_err(chip->dev, "regmap is invalid\n");
 200                 return -EINVAL;
 201         }
 202
 203         ret = regmap_read(map, PM805_CHIP_ID, &val);
 204         if (ret < 0) {
 205                 dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
 206                 goto out_irq_init;
 207         }
 208         chip->version = val;
 209
 210         chip->regmap_irq_chip = &pm805_irq_chip;
 211
 212         ret = device_irq_init_805(chip);
 213         if (ret < 0) {
 214                 dev_err(chip->dev, "Failed to init pm805 irq!\n");
 215                 goto out_irq_init;
 216         }
 217
 218         ret = mfd_add_devices(chip->dev, 0, &codec_devs[0],
 219                               ARRAY_SIZE(codec_devs), &codec_resources[0], 0,
 220                               NULL);
 221         if (ret < 0) {
 222                 dev_err(chip->dev, "Failed to add codec subdev\n");
 223                 goto out_codec;
 224         } else
 225                 dev_info(chip->dev, "[%s]:Added mfd codec_devs\n", __func__);
 226
 227         return 0;
 228
 229 out_codec:
 230         device_irq_exit_805(chip);
 231 out_irq_init:
 232         return ret;
 233 }
 234
 235 static int pm805_probe(struct i2c_client *client,
 236                                  const struct i2c_device_id *id)
 237 {
 238         int ret = 0;
 239         struct pm80x_chip *chip;
 240         struct pm80x_platform_data *pdata = client->dev.platform_data;
 241
 242         ret = pm80x_init(client, id);
 243         if (ret) {
 244                 dev_err(&client->dev, "pm805_init fail!\n");
 245                 goto out_init;
 246         }
 247
 248         chip = i2c_get_clientdata(client);
 249
 250         ret = device_805_init(chip);
 251         if (ret) {
 252                 dev_err(chip->dev, "%s id 0x%x failed!\n", __func__, chip->id);
 253                 goto err_805_init;
 254         }
 255
 256         if (pdata->plat_config)
 257                 pdata->plat_config(chip, pdata);
 258
 259 err_805_init:
 260         pm80x_deinit();
 261 out_init:
 262         return ret;
 263 }
 264
 265 static int pm805_remove(struct i2c_client *client)
 266 {
 267         struct pm80x_chip *chip = i2c_get_clientdata(client);
 268
 269         mfd_remove_devices(chip->dev);
 270         device_irq_exit_805(chip);
 271
 272         pm80x_deinit();
 273
 274         return 0;
 275 }
 276
 277 static struct i2c_driver pm805_driver = {
 278         .driver = {
 279                 .name = "88PM80X",
 280                 .owner = THIS_MODULE,
 281                 .pm = &pm80x_pm_ops,
 282                 },
 283         .probe = pm805_probe,
 284         .remove = pm805_remove,
 285         .id_table = pm80x_id_table,
 286 };
 287
 288 static int __init pm805_i2c_init(void)
 289 {
 290         return i2c_add_driver(&pm805_driver);
 291 }
 292 subsys_initcall(pm805_i2c_init);
 293
 294 static void __exit pm805_i2c_exit(void)
 295 {
 296         i2c_del_driver(&pm805_driver);
 297 }
 298 module_exit(pm805_i2c_exit);
 299
 300 MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM805");
 301 MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
 302 MODULE_LICENSE("GPL");