sound/soc/codecs/tpa6130a2.c

   1 /*
   2  * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver
   3  *
   4  * Copyright (C) Nokia Corporation
   5  *
   6  * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/errno.h>
  25 #include <linux/device.h>
  26 #include <linux/i2c.h>
  27 #include <linux/gpio.h>
  28 #include <linux/regulator/consumer.h>
  29 #include <linux/slab.h>
  30 #include <sound/tpa6130a2-plat.h>
  31 #include <sound/soc.h>
  32 #include <sound/tlv.h>
  33 #include <linux/of.h>
  34 #include <linux/of_gpio.h>
  35 #include <linux/regmap.h>
  36
  37 #include "tpa6130a2.h"
  38
  39 enum tpa_model {
  40         TPA6130A2,
  41         TPA6140A2,
  42 };
  43
  44 /* This struct is used to save the context */
  45 struct tpa6130a2_data {
  46         struct device *dev;
  47         struct regmap *regmap;
  48         struct regulator *supply;
  49         int power_gpio;
  50         enum tpa_model id;
  51 };
  52
  53 static int tpa6130a2_power(struct tpa6130a2_data *data, bool enable)
  54 {
  55         int ret;
  56
  57         if (enable) {
  58                 ret = regulator_enable(data->supply);
  59                 if (ret != 0) {
  60                         dev_err(data->dev,
  61                                 "Failed to enable supply: %d\n", ret);
  62                         return ret;
  63                 }
  64                 /* Power on */
  65                 if (data->power_gpio >= 0)
  66                         gpio_set_value(data->power_gpio, 1);
  67         } else {
  68                 /* Power off */
  69                 if (data->power_gpio >= 0)
  70                         gpio_set_value(data->power_gpio, 0);
  71
  72                 ret = regulator_disable(data->supply);
  73                 if (ret != 0) {
  74                         dev_err(data->dev,
  75                                 "Failed to disable supply: %d\n", ret);
  76                         return ret;
  77                 }
  78
  79                 /* device regs does not match the cache state anymore */
  80                 regcache_mark_dirty(data->regmap);
  81         }
  82
  83         return ret;
  84 }
  85
  86 static int tpa6130a2_power_event(struct snd_soc_dapm_widget *w,
  87                                  struct snd_kcontrol *kctrl, int event)
  88 {
  89         struct snd_soc_component *c = snd_soc_dapm_to_component(w->dapm);
  90         struct tpa6130a2_data *data = snd_soc_component_get_drvdata(c);
  91         int ret;
  92
  93         /* before widget power up */
  94         if (SND_SOC_DAPM_EVENT_ON(event)) {
  95                 /* Turn on the chip */
  96                 tpa6130a2_power(data, true);
  97                 /* Sync the registers */
  98                 ret = regcache_sync(data->regmap);
  99                 if (ret < 0) {
 100                         dev_err(c->dev, "Failed to initialize chip\n");
 101                         tpa6130a2_power(data, false);
 102                         return ret;
 103                 }
 104         /* after widget power down */
 105         } else {
 106                 tpa6130a2_power(data, false);
 107         }
 108
 109         return 0;
 110 }
 111
 112 /*
 113  * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
 114  * down in gain.
 115  */
 116 static const DECLARE_TLV_DB_RANGE(tpa6130_tlv,
 117         0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
 118         2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
 119         4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
 120         6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
 121         8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
 122         10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
 123         12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
 124         14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
 125         21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
 126         38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0)
 127 );
 128
 129 static const struct snd_kcontrol_new tpa6130a2_controls[] = {
 130         SOC_SINGLE_TLV("Headphone Playback Volume",
 131                        TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
 132                        tpa6130_tlv),
 133 };
 134
 135 static const DECLARE_TLV_DB_RANGE(tpa6140_tlv,
 136         0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
 137         9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
 138         17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0)
 139 );
 140
 141 static const struct snd_kcontrol_new tpa6140a2_controls[] = {
 142         SOC_SINGLE_TLV("Headphone Playback Volume",
 143                        TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
 144                        tpa6140_tlv),
 145 };
 146
 147 static int tpa6130a2_component_probe(struct snd_soc_component *component)
 148 {
 149         struct tpa6130a2_data *data = snd_soc_component_get_drvdata(component);
 150
 151         if (data->id == TPA6140A2)
 152                 return snd_soc_add_component_controls(component,
 153                         tpa6140a2_controls, ARRAY_SIZE(tpa6140a2_controls));
 154         else
 155                 return snd_soc_add_component_controls(component,
 156                         tpa6130a2_controls, ARRAY_SIZE(tpa6130a2_controls));
 157 }
 158
 159 static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {
 160         SND_SOC_DAPM_INPUT("LEFTIN"),
 161         SND_SOC_DAPM_INPUT("RIGHTIN"),
 162         SND_SOC_DAPM_OUTPUT("HPLEFT"),
 163         SND_SOC_DAPM_OUTPUT("HPRIGHT"),
 164
 165         SND_SOC_DAPM_PGA("Left Mute", TPA6130A2_REG_VOL_MUTE,
 166                          TPA6130A2_HP_EN_L_SHIFT, 1, NULL, 0),
 167         SND_SOC_DAPM_PGA("Right Mute", TPA6130A2_REG_VOL_MUTE,
 168                          TPA6130A2_HP_EN_R_SHIFT, 1, NULL, 0),
 169         SND_SOC_DAPM_PGA("Left PGA", TPA6130A2_REG_CONTROL,
 170                          TPA6130A2_HP_EN_L_SHIFT, 0, NULL, 0),
 171         SND_SOC_DAPM_PGA("Right PGA", TPA6130A2_REG_CONTROL,
 172                          TPA6130A2_HP_EN_R_SHIFT, 0, NULL, 0),
 173
 174         SND_SOC_DAPM_SUPPLY("Power", TPA6130A2_REG_CONTROL,
 175                             TPA6130A2_SWS_SHIFT, 1, tpa6130a2_power_event,
 176                             SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 177 };
 178
 179 static const struct snd_soc_dapm_route tpa6130a2_dapm_routes[] = {
 180         { "Left PGA", NULL, "LEFTIN" },
 181         { "Right PGA", NULL, "RIGHTIN" },
 182
 183         { "Left Mute", NULL, "Left PGA" },
 184         { "Right Mute", NULL, "Right PGA" },
 185
 186         { "HPLEFT", NULL, "Left Mute" },
 187         { "HPRIGHT", NULL, "Right Mute" },
 188
 189         { "Left PGA", NULL, "Power" },
 190         { "Right PGA", NULL, "Power" },
 191 };
 192
 193 struct snd_soc_component_driver tpa6130a2_component_driver = {
 194         .name = "tpa6130a2",
 195         .probe = tpa6130a2_component_probe,
 196         .dapm_widgets = tpa6130a2_dapm_widgets,
 197         .num_dapm_widgets = ARRAY_SIZE(tpa6130a2_dapm_widgets),
 198         .dapm_routes = tpa6130a2_dapm_routes,
 199         .num_dapm_routes = ARRAY_SIZE(tpa6130a2_dapm_routes),
 200 };
 201
 202 static const struct reg_default tpa6130a2_reg_defaults[] = {
 203         { TPA6130A2_REG_CONTROL, TPA6130A2_SWS },
 204         { TPA6130A2_REG_VOL_MUTE, TPA6130A2_MUTE_R | TPA6130A2_MUTE_L },
 205 };
 206
 207 static const struct regmap_config tpa6130a2_regmap_config = {
 208         .reg_bits = 8,
 209         .val_bits = 8,
 210         .max_register = TPA6130A2_REG_VERSION,
 211         .reg_defaults = tpa6130a2_reg_defaults,
 212         .num_reg_defaults = ARRAY_SIZE(tpa6130a2_reg_defaults),
 213         .cache_type = REGCACHE_RBTREE,
 214 };
 215
 216 static int tpa6130a2_probe(struct i2c_client *client,
 217                            const struct i2c_device_id *id)
 218 {
 219         struct device *dev;
 220         struct tpa6130a2_data *data;
 221         struct tpa6130a2_platform_data *pdata = client->dev.platform_data;
 222         struct device_node *np = client->dev.of_node;
 223         const char *regulator;
 224         unsigned int version;
 225         int ret;
 226
 227         dev = &client->dev;
 228
 229         data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
 230         if (!data)
 231                 return -ENOMEM;
 232
 233         data->dev = dev;
 234
 235         data->regmap = devm_regmap_init_i2c(client, &tpa6130a2_regmap_config);
 236         if (IS_ERR(data->regmap))
 237                 return PTR_ERR(data->regmap);
 238
 239         if (pdata) {
 240                 data->power_gpio = pdata->power_gpio;
 241         } else if (np) {
 242                 data->power_gpio = of_get_named_gpio(np, "power-gpio", 0);
 243         } else {
 244                 dev_err(dev, "Platform data not set\n");
 245                 dump_stack();
 246                 return -ENODEV;
 247         }
 248
 249         i2c_set_clientdata(client, data);
 250
 251         data->id = id->driver_data;
 252
 253         if (data->power_gpio >= 0) {
 254                 ret = devm_gpio_request(dev, data->power_gpio,
 255                                         "tpa6130a2 enable");
 256                 if (ret < 0) {
 257                         dev_err(dev, "Failed to request power GPIO (%d)\n",
 258                                 data->power_gpio);
 259                         return ret;
 260                 }
 261                 gpio_direction_output(data->power_gpio, 0);
 262         }
 263
 264         switch (data->id) {
 265         default:
 266                 dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
 267                          data->id);
 268         case TPA6130A2:
 269                 regulator = "Vdd";
 270                 break;
 271         case TPA6140A2:
 272                 regulator = "AVdd";
 273                 break;
 274         }
 275
 276         data->supply = devm_regulator_get(dev, regulator);
 277         if (IS_ERR(data->supply)) {
 278                 ret = PTR_ERR(data->supply);
 279                 dev_err(dev, "Failed to request supply: %d\n", ret);
 280                 return ret;
 281         }
 282
 283         ret = tpa6130a2_power(data, true);
 284         if (ret != 0)
 285                 return ret;
 286
 287
 288         /* Read version */
 289         regmap_read(data->regmap, TPA6130A2_REG_VERSION, &version);
 290         version &= TPA6130A2_VERSION_MASK;
 291         if ((version != 1) && (version != 2))
 292                 dev_warn(dev, "UNTESTED version detected (%d)\n", version);
 293
 294         /* Disable the chip */
 295         ret = tpa6130a2_power(data, false);
 296         if (ret != 0)
 297                 return ret;
 298
 299         return devm_snd_soc_register_component(&client->dev,
 300                         &tpa6130a2_component_driver, NULL, 0);
 301 }
 302
 303 static const struct i2c_device_id tpa6130a2_id[] = {
 304         { "tpa6130a2", TPA6130A2 },
 305         { "tpa6140a2", TPA6140A2 },
 306         { }
 307 };
 308 MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
 309
 310 #if IS_ENABLED(CONFIG_OF)
 311 static const struct of_device_id tpa6130a2_of_match[] = {
 312         { .compatible = "ti,tpa6130a2", },
 313         { .compatible = "ti,tpa6140a2" },
 314         {},
 315 };
 316 MODULE_DEVICE_TABLE(of, tpa6130a2_of_match);
 317 #endif
 318
 319 static struct i2c_driver tpa6130a2_i2c_driver = {
 320         .driver = {
 321                 .name = "tpa6130a2",
 322                 .of_match_table = of_match_ptr(tpa6130a2_of_match),
 323         },
 324         .probe = tpa6130a2_probe,
 325         .id_table = tpa6130a2_id,
 326 };
 327
 328 module_i2c_driver(tpa6130a2_i2c_driver);
 329
 330 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
 331 MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
 332 MODULE_LICENSE("GPL");