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 static const struct i2c_device_id pm80x_id_table[] = {
  33         { "88PM805" },
  34         {} /* NULL terminated */
  35 };
  36 MODULE_DEVICE_TABLE(i2c, pm80x_id_table);
  37
  38 /* Interrupt Number in 88PM805 */
  39 enum {
  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
  56 static struct resource codec_resources[] = {
  57         /* Headset microphone insertion or removal */
  58         DEFINE_RES_IRQ_NAMED(PM805_IRQ_MIC_DET, "micin"),
  59
  60         /* Audio short HP1 */
  61         DEFINE_RES_IRQ_NAMED(PM805_IRQ_HP1_SHRT, "audio-short1"),
  62
  63         /* Audio short HP2 */
  64         DEFINE_RES_IRQ_NAMED(PM805_IRQ_HP2_SHRT, "audio-short2"),
  65 };
  66
  67 static const struct mfd_cell codec_devs[] = {
  68         {
  69          .name = "88pm80x-codec",
  70          .num_resources = ARRAY_SIZE(codec_resources),
  71          .resources = &codec_resources[0],
  72          .id = -1,
  73          },
  74 };
  75
  76 static const struct regmap_irq pm805_irqs[] = {
  77         /* INT0 */
  78         [PM805_IRQ_LDO_OFF] = {
  79                 .mask = PM805_INT1_HP1_SHRT,
  80         },
  81         [PM805_IRQ_SRC_DPLL_LOCK] = {
  82                 .mask = PM805_INT1_HP2_SHRT,
  83         },
  84         [PM805_IRQ_CLIP_FAULT] = {
  85                 .mask = PM805_INT1_MIC_CONFLICT,
  86         },
  87         [PM805_IRQ_MIC_CONFLICT] = {
  88                 .mask = PM805_INT1_CLIP_FAULT,
  89         },
  90         [PM805_IRQ_HP2_SHRT] = {
  91                 .mask = PM805_INT1_LDO_OFF,
  92         },
  93         [PM805_IRQ_HP1_SHRT] = {
  94                 .mask = PM805_INT1_SRC_DPLL_LOCK,
  95         },
  96         /* INT1 */
  97         [PM805_IRQ_FINE_PLL_FAULT] = {
  98                 .reg_offset = 1,
  99                 .mask = PM805_INT2_MIC_DET,
 100         },
 101         [PM805_IRQ_RAW_PLL_FAULT] = {
 102                 .reg_offset = 1,
 103                 .mask = PM805_INT2_SHRT_BTN_DET,
 104         },
 105         [PM805_IRQ_VOLP_BTN_DET] = {
 106                 .reg_offset = 1,
 107                 .mask = PM805_INT2_VOLM_BTN_DET,
 108         },
 109         [PM805_IRQ_VOLM_BTN_DET] = {
 110                 .reg_offset = 1,
 111                 .mask = PM805_INT2_VOLP_BTN_DET,
 112         },
 113         [PM805_IRQ_SHRT_BTN_DET] = {
 114                 .reg_offset = 1,
 115                 .mask = PM805_INT2_RAW_PLL_FAULT,
 116         },
 117         [PM805_IRQ_MIC_DET] = {
 118                 .reg_offset = 1,
 119                 .mask = PM805_INT2_FINE_PLL_FAULT,
 120         },
 121 };
 122
 123 static int device_irq_init_805(struct pm80x_chip *chip)
 124 {
 125         struct regmap *map = chip->regmap;
 126         unsigned long flags = IRQF_ONESHOT;
 127         int data, mask, ret = -EINVAL;
 128
 129         if (!map || !chip->irq) {
 130                 dev_err(chip->dev, "incorrect parameters\n");
 131                 return -EINVAL;
 132         }
 133
 134         /*
 135          * irq_mode defines the way of clearing interrupt. it's read-clear by
 136          * default.
 137          */
 138         mask =
 139             PM805_STATUS0_INT_CLEAR | PM805_STATUS0_INV_INT |
 140             PM800_STATUS0_INT_MASK;
 141
 142         data = PM805_STATUS0_INT_CLEAR;
 143         ret = regmap_update_bits(map, PM805_INT_STATUS0, mask, data);
 144         /*
 145          * PM805_INT_STATUS is under 32K clock domain, so need to
 146          * add proper delay before the next I2C register access.
 147          */
 148         usleep_range(1000, 3000);
 149
 150         if (ret < 0)
 151                 goto out;
 152
 153         ret =
 154             regmap_add_irq_chip(chip->regmap, chip->irq, flags, -1,
 155                                 chip->regmap_irq_chip, &chip->irq_data);
 156
 157 out:
 158         return ret;
 159 }
 160
 161 static void device_irq_exit_805(struct pm80x_chip *chip)
 162 {
 163         regmap_del_irq_chip(chip->irq, chip->irq_data);
 164 }
 165
 166 static const struct regmap_irq_chip pm805_irq_chip = {
 167         .name = "88pm805",
 168         .irqs = pm805_irqs,
 169         .num_irqs = ARRAY_SIZE(pm805_irqs),
 170
 171         .num_regs = 2,
 172         .status_base = PM805_INT_STATUS1,
 173         .mask_base = PM805_INT_MASK1,
 174         .ack_base = PM805_INT_STATUS1,
 175 };
 176
 177 static int device_805_init(struct pm80x_chip *chip)
 178 {
 179         int ret = 0;
 180         struct regmap *map = chip->regmap;
 181
 182         if (!map) {
 183                 dev_err(chip->dev, "regmap is invalid\n");
 184                 return -EINVAL;
 185         }
 186
 187         chip->regmap_irq_chip = &pm805_irq_chip;
 188
 189         ret = device_irq_init_805(chip);
 190         if (ret < 0) {
 191                 dev_err(chip->dev, "Failed to init pm805 irq!\n");
 192                 goto out_irq_init;
 193         }
 194
 195         ret = mfd_add_devices(chip->dev, 0, &codec_devs[0],
 196                               ARRAY_SIZE(codec_devs), &codec_resources[0], 0,
 197                               NULL);
 198         if (ret < 0) {
 199                 dev_err(chip->dev, "Failed to add codec subdev\n");
 200                 goto out_codec;
 201         } else
 202                 dev_info(chip->dev, "[%s]:Added mfd codec_devs\n", __func__);
 203
 204         return 0;
 205
 206 out_codec:
 207         device_irq_exit_805(chip);
 208 out_irq_init:
 209         return ret;
 210 }
 211
 212 static int pm805_probe(struct i2c_client *client)
 213 {
 214         int ret = 0;
 215         struct pm80x_chip *chip;
 216         struct pm80x_platform_data *pdata = dev_get_platdata(&client->dev);
 217
 218         ret = pm80x_init(client);
 219         if (ret) {
 220                 dev_err(&client->dev, "pm805_init fail!\n");
 221                 goto out_init;
 222         }
 223
 224         chip = i2c_get_clientdata(client);
 225
 226         ret = device_805_init(chip);
 227         if (ret) {
 228                 dev_err(chip->dev, "Failed to initialize 88pm805 devices\n");
 229                 goto err_805_init;
 230         }
 231
 232         if (pdata && pdata->plat_config)
 233                 pdata->plat_config(chip, pdata);
 234
 235 err_805_init:
 236         pm80x_deinit();
 237 out_init:
 238         return ret;
 239 }
 240
 241 static void pm805_remove(struct i2c_client *client)
 242 {
 243         struct pm80x_chip *chip = i2c_get_clientdata(client);
 244
 245         mfd_remove_devices(chip->dev);
 246         device_irq_exit_805(chip);
 247
 248         pm80x_deinit();
 249 }
 250
 251 static struct i2c_driver pm805_driver = {
 252         .driver = {
 253                 .name = "88PM805",
 254                 .pm = pm_sleep_ptr(&pm80x_pm_ops),
 255                 },
 256         .probe = pm805_probe,
 257         .remove = pm805_remove,
 258         .id_table = pm80x_id_table,
 259 };
 260
 261 static int __init pm805_i2c_init(void)
 262 {
 263         return i2c_add_driver(&pm805_driver);
 264 }
 265 subsys_initcall(pm805_i2c_init);
 266
 267 static void __exit pm805_i2c_exit(void)
 268 {
 269         i2c_del_driver(&pm805_driver);
 270 }
 271 module_exit(pm805_i2c_exit);
 272
 273 MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM805");
 274 MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
 275 MODULE_LICENSE("GPL");