MFD: twl4030-codec -> twl4030-audio: Rename the driver

Rename the driver, and header file from twl4030-codec to
twl4030-audio.
To avoid breakage change depending drivers at the same time.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
CC: Misael Lopez Cruz <misael.lopez@ti.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 277 insertions, 0 deletions

diff --git a/drivers/mfd/twl4030-audio.c b/drivers/mfd/twl4030-audio.c
new file mode 100644
index 00000000000..5cdf8414679
--- /dev/null
+++ b/drivers/mfd/twl4030-audio.c
@@ -0,0 +1,277 @@
+/*
+ * MFD driver for twl4030 audio submodule, which contains an audio codec, and
+ * the vibra control.
+ *
+ * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
+ *
+ * Copyright:   (C) 2009 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/platform_device.h>
+#include <linux/i2c/twl.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/twl4030-audio.h>
+
+#define TWL4030_AUDIO_CELLS	2
+
+static struct platform_device *twl4030_audio_dev;
+
+struct twl4030_audio_resource {
+	int request_count;
+	u8 reg;
+	u8 mask;
+};
+
+struct twl4030_audio {
+	unsigned int audio_mclk;
+	struct mutex mutex;
+	struct twl4030_audio_resource resource[TWL4030_AUDIO_RES_MAX];
+	struct mfd_cell cells[TWL4030_AUDIO_CELLS];
+};
+
+/*
+ * Modify the resource, the function returns the content of the register
+ * after the modification.
+ */
+static int twl4030_audio_set_resource(enum twl4030_audio_res id, int enable)
+{
+	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
+	u8 val;
+
+	twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
+			audio->resource[id].reg);
+
+	if (enable)
+		val |= audio->resource[id].mask;
+	else
+		val &= ~audio->resource[id].mask;
+
+	twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
+					val, audio->resource[id].reg);
+
+	return val;
+}
+
+static inline int twl4030_audio_get_resource(enum twl4030_audio_res id)
+{
+	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
+	u8 val;
+
+	twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
+			audio->resource[id].reg);
+
+	return val;
+}
+
+/*
+ * Enable the resource.
+ * The function returns with error or the content of the register
+ */
+int twl4030_audio_enable_resource(enum twl4030_audio_res id)
+{
+	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
+	int val;
+
+	if (id >= TWL4030_AUDIO_RES_MAX) {
+		dev_err(&twl4030_audio_dev->dev,
+				"Invalid resource ID (%u)\n", id);
+		return -EINVAL;
+	}
+
+	mutex_lock(&audio->mutex);
+	if (!audio->resource[id].request_count)
+		/* Resource was disabled, enable it */
+		val = twl4030_audio_set_resource(id, 1);
+	else
+		val = twl4030_audio_get_resource(id);
+
+	audio->resource[id].request_count++;
+	mutex_unlock(&audio->mutex);
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(twl4030_audio_enable_resource);
+
+/*
+ * Disable the resource.
+ * The function returns with error or the content of the register
+ */
+int twl4030_audio_disable_resource(unsigned id)
+{
+	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
+	int val;
+
+	if (id >= TWL4030_AUDIO_RES_MAX) {
+		dev_err(&twl4030_audio_dev->dev,
+				"Invalid resource ID (%u)\n", id);
+		return -EINVAL;
+	}
+
+	mutex_lock(&audio->mutex);
+	if (!audio->resource[id].request_count) {
+		dev_err(&twl4030_audio_dev->dev,
+			"Resource has been disabled already (%u)\n", id);
+		mutex_unlock(&audio->mutex);
+		return -EPERM;
+	}
+	audio->resource[id].request_count--;
+
+	if (!audio->resource[id].request_count)
+		/* Resource can be disabled now */
+		val = twl4030_audio_set_resource(id, 0);
+	else
+		val = twl4030_audio_get_resource(id);
+
+	mutex_unlock(&audio->mutex);
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(twl4030_audio_disable_resource);
+
+unsigned int twl4030_audio_get_mclk(void)
+{
+	struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
+
+	return audio->audio_mclk;
+}
+EXPORT_SYMBOL_GPL(twl4030_audio_get_mclk);
+
+static int __devinit twl4030_audio_probe(struct platform_device *pdev)
+{
+	struct twl4030_audio *audio;
+	struct twl4030_codec_data *pdata = pdev->dev.platform_data;
+	struct mfd_cell *cell = NULL;
+	int ret, childs = 0;
+	u8 val;
+
+	if (!pdata) {
+		dev_err(&pdev->dev, "Platform data is missing\n");
+		return -EINVAL;
+	}
+
+	/* Configure APLL_INFREQ and disable APLL if enabled */
+	val = 0;
+	switch (pdata->audio_mclk) {
+	case 19200000:
+		val |= TWL4030_APLL_INFREQ_19200KHZ;
+		break;
+	case 26000000:
+		val |= TWL4030_APLL_INFREQ_26000KHZ;
+		break;
+	case 38400000:
+		val |= TWL4030_APLL_INFREQ_38400KHZ;
+		break;
+	default:
+		dev_err(&pdev->dev, "Invalid audio_mclk\n");
+		return -EINVAL;
+	}
+	twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
+					val, TWL4030_REG_APLL_CTL);
+
+	audio = kzalloc(sizeof(struct twl4030_audio), GFP_KERNEL);
+	if (!audio)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, audio);
+
+	twl4030_audio_dev = pdev;
+	mutex_init(&audio->mutex);
+	audio->audio_mclk = pdata->audio_mclk;
+
+	/* Codec power */
+	audio->resource[TWL4030_AUDIO_RES_POWER].reg = TWL4030_REG_CODEC_MODE;
+	audio->resource[TWL4030_AUDIO_RES_POWER].mask = TWL4030_CODECPDZ;
+
+	/* PLL */
+	audio->resource[TWL4030_AUDIO_RES_APLL].reg = TWL4030_REG_APLL_CTL;
+	audio->resource[TWL4030_AUDIO_RES_APLL].mask = TWL4030_APLL_EN;
+
+	if (pdata->audio) {
+		cell = &audio->cells[childs];
+		cell->name = "twl4030-codec";
+		cell->platform_data = pdata->audio;
+		cell->pdata_size = sizeof(*pdata->audio);
+		childs++;
+	}
+	if (pdata->vibra) {
+		cell = &audio->cells[childs];
+		cell->name = "twl4030-vibra";
+		cell->platform_data = pdata->vibra;
+		cell->pdata_size = sizeof(*pdata->vibra);
+		childs++;
+	}
+
+	if (childs)
+		ret = mfd_add_devices(&pdev->dev, pdev->id, audio->cells,
+				      childs, NULL, 0);
+	else {
+		dev_err(&pdev->dev, "No platform data found for childs\n");
+		ret = -ENODEV;
+	}
+
+	if (!ret)
+		return 0;
+
+	platform_set_drvdata(pdev, NULL);
+	kfree(audio);
+	twl4030_audio_dev = NULL;
+	return ret;
+}
+
+static int __devexit twl4030_audio_remove(struct platform_device *pdev)
+{
+	struct twl4030_audio *audio = platform_get_drvdata(pdev);
+
+	mfd_remove_devices(&pdev->dev);
+	platform_set_drvdata(pdev, NULL);
+	kfree(audio);
+	twl4030_audio_dev = NULL;
+
+	return 0;
+}
+
+MODULE_ALIAS("platform:twl4030-audio");
+
+static struct platform_driver twl4030_audio_driver = {
+	.probe		= twl4030_audio_probe,
+	.remove		= __devexit_p(twl4030_audio_remove),
+	.driver		= {
+		.owner	= THIS_MODULE,
+		.name	= "twl4030-audio",
+	},
+};
+
+static int __devinit twl4030_audio_init(void)
+{
+	return platform_driver_register(&twl4030_audio_driver);
+}
+module_init(twl4030_audio_init);
+
+static void __devexit twl4030_audio_exit(void)
+{
+	platform_driver_unregister(&twl4030_audio_driver);
+}
+module_exit(twl4030_audio_exit);
+
+MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
+MODULE_LICENSE("GPL");