ASoC: Move WM8580 to normal I2C device probe

Refactor the WM8580 device registration to probe via standard I2C device
registration, registering the DAIs once the device has probed via I2C.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 158 insertions, 168 deletions

diff --git a/sound/soc/codecs/wm8580.c b/sound/soc/codecs/wm8580.c
index 27f9e231bf69..442ea6f160fc 100644
--- a/sound/soc/codecs/wm8580.c
+++ b/sound/soc/codecs/wm8580.c
@@ -1,7 +1,7 @@
 /*
  * wm8580.c  --  WM8580 ALSA Soc Audio driver
  *
- * Copyright 2008 Wolfson Microelectronics PLC.
+ * Copyright 2008, 2009 Wolfson Microelectronics PLC.
  *
  *  This program is free software; you can redistribute  it and/or modify it
  *  under  the terms of  the GNU General  Public License as published by the
@@ -35,17 +35,6 @@
 
 #include "wm8580.h"
 
-struct pll_state {
-        unsigned int in;
-        unsigned int out;
-};
-
-/* codec private data */
-struct wm8580_priv {
-        struct pll_state a;
-        struct pll_state b;
-};
-
 /* WM8580 register space */
 #define WM8580_PLLA1                         0x00
 #define WM8580_PLLA2                         0x01
@@ -100,6 +89,8 @@ struct wm8580_priv {
 #define WM8580_READBACK                      0x34
 #define WM8580_RESET                         0x35
 
+#define WM8580_MAX_REGISTER                  0x35
+
 /* PLLB4 (register 7h) */
 #define WM8580_PLLB4_MCLKOUTSRC_MASK   0x60
 #define WM8580_PLLB4_MCLKOUTSRC_PLLA   0x20
@@ -191,6 +182,20 @@ static const u16 wm8580_reg[] = {
         0x0000, 0x0000 /*R53*/
 };
 
+struct pll_state {
+        unsigned int in;
+        unsigned int out;
+};
+
+/* codec private data */
+struct wm8580_priv {
+        struct snd_soc_codec codec;
+        u16 reg_cache[WM8580_MAX_REGISTER + 1];
+        struct pll_state a;
+        struct pll_state b;
+};
+
+
 /*
  * read wm8580 register cache
  */
@@ -755,8 +760,22 @@ static int wm8580_set_bias_level(struct snd_soc_codec *codec,
         switch (level) {
         case SND_SOC_BIAS_ON:
         case SND_SOC_BIAS_PREPARE:
+                break;
+
         case SND_SOC_BIAS_STANDBY:
+                if (codec->bias_level == SND_SOC_BIAS_OFF) {
+                        /* Power up and get individual control of the DACs */
+                        reg = wm8580_read(codec, WM8580_PWRDN1);
+                        reg &= ~(WM8580_PWRDN1_PWDN | WM8580_PWRDN1_ALLDACPD);
+                        wm8580_write(codec, WM8580_PWRDN1, reg);
+
+                        /* Make VMID high impedence */
+                        reg = wm8580_read(codec,  WM8580_ADC_CONTROL1);
+                        reg &= ~0x100;
+                        wm8580_write(codec, WM8580_ADC_CONTROL1, reg);
+                }
                 break;
+
         case SND_SOC_BIAS_OFF:
                 reg = wm8580_read(codec, WM8580_PWRDN1);
                 wm8580_write(codec, WM8580_PWRDN1, reg | WM8580_PWRDN1_PWDN);
@@ -812,100 +831,163 @@ struct snd_soc_dai wm8580_dai[] = {
 };
 EXPORT_SYMBOL_GPL(wm8580_dai);
 
-/*
- * initialise the WM8580 driver
- * register the mixer and dsp interfaces with the kernel
- */
-static int wm8580_init(struct snd_soc_device *socdev)
+static struct snd_soc_codec *wm8580_codec;
+
+static int wm8580_probe(struct platform_device *pdev)
 {
-        struct snd_soc_codec *codec = socdev->card->codec;
+        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
+        struct snd_soc_codec *codec;
         int ret = 0;
 
-        codec->name = "WM8580";
-        codec->owner = THIS_MODULE;
-        codec->read = wm8580_read_reg_cache;
-        codec->write = wm8580_write;
-        codec->set_bias_level = wm8580_set_bias_level;
-        codec->dai = wm8580_dai;
-        codec->num_dai = ARRAY_SIZE(wm8580_dai);
-        codec->reg_cache_size = ARRAY_SIZE(wm8580_reg);
-        codec->reg_cache = kmemdup(wm8580_reg, sizeof(wm8580_reg),
-                                   GFP_KERNEL);
-
-        if (codec->reg_cache == NULL)
-                return -ENOMEM;
-
-        /* Get the codec into a known state */
-        wm8580_write(codec, WM8580_RESET, 0);
-
-        /* Power up and get individual control of the DACs */
-        wm8580_write(codec, WM8580_PWRDN1, wm8580_read(codec, WM8580_PWRDN1) &
-                     ~(WM8580_PWRDN1_PWDN | WM8580_PWRDN1_ALLDACPD));
+        if (wm8580_codec == NULL) {
+                dev_err(&pdev->dev, "Codec device not registered\n");
+                return -ENODEV;
+        }
 
-        /* Make VMID high impedence */
-        wm8580_write(codec, WM8580_ADC_CONTROL1,
-                     wm8580_read(codec,  WM8580_ADC_CONTROL1) & ~0x100);
+        socdev->card->codec = wm8580_codec;
+        codec = wm8580_codec;
 
         /* register pcms */
-        ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1,
-                               SNDRV_DEFAULT_STR1);
+        ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
         if (ret < 0) {
-                printk(KERN_ERR "wm8580: failed to create pcms\n");
+                dev_err(codec->dev, "failed to create pcms: %d\n", ret);
                 goto pcm_err;
         }
 
         snd_soc_add_controls(codec, wm8580_snd_controls,
-                                ARRAY_SIZE(wm8580_snd_controls));
+                             ARRAY_SIZE(wm8580_snd_controls));
         wm8580_add_widgets(codec);
-
         ret = snd_soc_init_card(socdev);
         if (ret < 0) {
-                printk(KERN_ERR "wm8580: failed to register card\n");
+                dev_err(codec->dev, "failed to register card: %d\n", ret);
                 goto card_err;
         }
+
         return ret;
 
 card_err:
         snd_soc_free_pcms(socdev);
         snd_soc_dapm_free(socdev);
 pcm_err:
-        kfree(codec->reg_cache);
         return ret;
 }
 
-/* If the i2c layer weren't so broken, we could pass this kind of data
-   around */
-static struct snd_soc_device *wm8580_socdev;
+/* power down chip */
+static int wm8580_remove(struct platform_device *pdev)
+{
+        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 
-#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+        snd_soc_free_pcms(socdev);
+        snd_soc_dapm_free(socdev);
 
-/*
- * WM8580 2 wire address is determined by GPIO5
- * state during powerup.
- *    low  = 0x1a
- *    high = 0x1b
- */
+        return 0;
+}
+
+struct snd_soc_codec_device soc_codec_dev_wm8580 = {
+        .probe =        wm8580_probe,
+        .remove =       wm8580_remove,
+};
+EXPORT_SYMBOL_GPL(soc_codec_dev_wm8580);
+
+static int wm8580_register(struct wm8580_priv *wm8580)
+{
+        int ret, i;
+        struct snd_soc_codec *codec = &wm8580->codec;
+
+        if (wm8580_codec) {
+                dev_err(codec->dev, "Another WM8580 is registered\n");
+                ret = -EINVAL;
+                goto err;
+        }
+
+        mutex_init(&codec->mutex);
+        INIT_LIST_HEAD(&codec->dapm_widgets);
+        INIT_LIST_HEAD(&codec->dapm_paths);
+
+        codec->private_data = wm8580;
+        codec->name = "WM8580";
+        codec->owner = THIS_MODULE;
+        codec->read = wm8580_read_reg_cache;
+        codec->write = wm8580_write;
+        codec->bias_level = SND_SOC_BIAS_OFF;
+        codec->set_bias_level = wm8580_set_bias_level;
+        codec->dai = wm8580_dai;
+        codec->num_dai = ARRAY_SIZE(wm8580_dai);
+        codec->reg_cache_size = ARRAY_SIZE(wm8580->reg_cache);
+        codec->reg_cache = &wm8580->reg_cache;
+
+        memcpy(codec->reg_cache, wm8580_reg, sizeof(wm8580_reg));
+
+        /* Get the codec into a known state */
+        ret = wm8580_write(codec, WM8580_RESET, 0);
+        if (ret != 0) {
+                dev_err(codec->dev, "Failed to reset codec: %d\n", ret);
+                goto err;
+        }
+
+        for (i = 0; i < ARRAY_SIZE(wm8580_dai); i++)
+                wm8580_dai[i].dev = codec->dev;
+
+        wm8580_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 
+        wm8580_codec = codec;
+
+        ret = snd_soc_register_codec(codec);
+        if (ret != 0) {
+                dev_err(codec->dev, "Failed to register codec: %d\n", ret);
+                goto err;
+        }
+
+        ret = snd_soc_register_dais(wm8580_dai, ARRAY_SIZE(wm8580_dai));
+        if (ret != 0) {
+                dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
+                goto err_codec;
+        }
+
+        return 0;
+
+err_codec:
+        snd_soc_unregister_codec(codec);
+err:
+        kfree(wm8580);
+        return ret;
+}
+
+static void wm8580_unregister(struct wm8580_priv *wm8580)
+{
+        wm8580_set_bias_level(&wm8580->codec, SND_SOC_BIAS_OFF);
+        snd_soc_unregister_dais(wm8580_dai, ARRAY_SIZE(wm8580_dai));
+        snd_soc_unregister_codec(&wm8580->codec);
+        kfree(wm8580);
+        wm8580_codec = NULL;
+}
+
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 static int wm8580_i2c_probe(struct i2c_client *i2c,
                             const struct i2c_device_id *id)
 {
-        struct snd_soc_device *socdev = wm8580_socdev;
-        struct snd_soc_codec *codec = socdev->card->codec;
-        int ret;
+        struct wm8580_priv *wm8580;
+        struct snd_soc_codec *codec;
+
+        wm8580 = kzalloc(sizeof(struct wm8580_priv), GFP_KERNEL);
+        if (wm8580 == NULL)
+                return -ENOMEM;
+
+        codec = &wm8580->codec;
+        codec->hw_write = (hw_write_t)i2c_master_send;
 
-        i2c_set_clientdata(i2c, codec);
+        i2c_set_clientdata(i2c, wm8580);
         codec->control_data = i2c;
 
-        ret = wm8580_init(socdev);
-        if (ret < 0)
-                dev_err(&i2c->dev, "failed to initialise WM8580\n");
-        return ret;
+        codec->dev = &i2c->dev;
+
+        return wm8580_register(wm8580);
 }
 
 static int wm8580_i2c_remove(struct i2c_client *client)
 {
-        struct snd_soc_codec *codec = i2c_get_clientdata(client);
-        kfree(codec->reg_cache);
+        struct wm8580_priv *wm8580 = i2c_get_clientdata(client);
+        wm8580_unregister(wm8580);
         return 0;
 }
 
@@ -917,127 +999,35 @@ MODULE_DEVICE_TABLE(i2c, wm8580_i2c_id);
 
 static struct i2c_driver wm8580_i2c_driver = {
         .driver = {
-                .name = "WM8580 I2C Codec",
+                .name = "wm8580",
                 .owner = THIS_MODULE,
         },
         .probe =    wm8580_i2c_probe,
         .remove =   wm8580_i2c_remove,
         .id_table = wm8580_i2c_id,
 };
+#endif
 
-static int wm8580_add_i2c_device(struct platform_device *pdev,
-                                 const struct wm8580_setup_data *setup)
+static int __init wm8580_modinit(void)
 {
-        struct i2c_board_info info;
-        struct i2c_adapter *adapter;
-        struct i2c_client *client;
         int ret;
 
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
         ret = i2c_add_driver(&wm8580_i2c_driver);
         if (ret != 0) {
-                dev_err(&pdev->dev, "can't add i2c driver\n");
-                return ret;
-        }
-
-        memset(&info, 0, sizeof(struct i2c_board_info));
-        info.addr = setup->i2c_address;
-        strlcpy(info.type, "wm8580", I2C_NAME_SIZE);
-
-        adapter = i2c_get_adapter(setup->i2c_bus);
-        if (!adapter) {
-                dev_err(&pdev->dev, "can't get i2c adapter %d\n",
-                        setup->i2c_bus);
-                goto err_driver;
-        }
-
-        client = i2c_new_device(adapter, &info);
-        i2c_put_adapter(adapter);
-        if (!client) {
-                dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
-                        (unsigned int)info.addr);
-                goto err_driver;
-        }
-
-        return 0;
-
-err_driver:
-        i2c_del_driver(&wm8580_i2c_driver);
-        return -ENODEV;
-}
-#endif
-
-static int wm8580_probe(struct platform_device *pdev)
-{
-        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-        struct wm8580_setup_data *setup;
-        struct snd_soc_codec *codec;
-        struct wm8580_priv *wm8580;
-        int ret = 0;
-
-        setup = socdev->codec_data;
-        codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
-        if (codec == NULL)
-                return -ENOMEM;
-
-        wm8580 = kzalloc(sizeof(struct wm8580_priv), GFP_KERNEL);
-        if (wm8580 == NULL) {
-                kfree(codec);
-                return -ENOMEM;
+                pr_err("Failed to register WM8580 I2C driver: %d\n", ret);
         }
-
-        codec->private_data = wm8580;
-        socdev->card->codec = codec;
-        mutex_init(&codec->mutex);
-        INIT_LIST_HEAD(&codec->dapm_widgets);
-        INIT_LIST_HEAD(&codec->dapm_paths);
-        wm8580_socdev = socdev;
-
-#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
-        if (setup->i2c_address) {
-                codec->hw_write = (hw_write_t)i2c_master_send;
-                ret = wm8580_add_i2c_device(pdev, setup);
-        }
-#else
-                /* Add other interfaces here */
-#endif
-        return ret;
-}
-
-/* power down chip */
-static int wm8580_remove(struct platform_device *pdev)
-{
-        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
-        struct snd_soc_codec *codec = socdev->card->codec;
-
-        if (codec->control_data)
-                wm8580_set_bias_level(codec, SND_SOC_BIAS_OFF);
-        snd_soc_free_pcms(socdev);
-        snd_soc_dapm_free(socdev);
-#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
-        i2c_unregister_device(codec->control_data);
-        i2c_del_driver(&wm8580_i2c_driver);
 #endif
-        kfree(codec->private_data);
-        kfree(codec);
 
         return 0;
 }
-
-struct snd_soc_codec_device soc_codec_dev_wm8580 = {
-        .probe =        wm8580_probe,
-        .remove =       wm8580_remove,
-};
-EXPORT_SYMBOL_GPL(soc_codec_dev_wm8580);
-
-static int __init wm8580_modinit(void)
-{
-        return snd_soc_register_dais(wm8580_dai, ARRAY_SIZE(wm8580_dai));
-}
 module_init(wm8580_modinit);
 
 static void __exit wm8580_exit(void)
 {
-        snd_soc_unregister_dais(wm8580_dai, ARRAY_SIZE(wm8580_dai));
+#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
+        i2c_del_driver(&wm8580_i2c_driver);
+#endif
 }
 module_exit(wm8580_exit);