ASoC: rt286: Add RL6347A class device shared support for RT286

The patch separates the IO function from the rt286. It is prepared to share
for new chips that support the same IO function.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 128 insertions, 0 deletions

diff --git a/sound/soc/codecs/rl6347a.c b/sound/soc/codecs/rl6347a.c
new file mode 100644
index 000000000000..91d5166bd3a1
--- /dev/null
+++ b/sound/soc/codecs/rl6347a.c
@@ -0,0 +1,128 @@
+/*
+ * rl6347a.c - RL6347A class device shared support
+ *
+ * Copyright 2015 Realtek Semiconductor Corp.
+ *
+ * Author: Oder Chiou <oder_chiou@realtek.com>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/dmi.h>
+#include <linux/acpi.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+#include <sound/jack.h>
+#include <linux/workqueue.h>
+#include <sound/hda_verbs.h>
+
+#include "rl6347a.h"
+
+int rl6347a_hw_write(void *context, unsigned int reg, unsigned int value)
+{
+	struct i2c_client *client = context;
+	struct rl6347a_priv *rl6347a = i2c_get_clientdata(client);
+	u8 data[4];
+	int ret, i;
+
+	/* handle index registers */
+	if (reg <= 0xff) {
+		rl6347a_hw_write(client, RL6347A_COEF_INDEX, reg);
+		for (i = 0; i < rl6347a->index_cache_size; i++) {
+			if (reg == rl6347a->index_cache[i].reg) {
+				rl6347a->index_cache[i].def = value;
+				break;
+			}
+
+		}
+		reg = RL6347A_PROC_COEF;
+	}
+
+	data[0] = (reg >> 24) & 0xff;
+	data[1] = (reg >> 16) & 0xff;
+	/*
+	 * 4 bit VID: reg should be 0
+	 * 12 bit VID: value should be 0
+	 * So we use an OR operator to handle it rather than use if condition.
+	 */
+	data[2] = ((reg >> 8) & 0xff) | ((value >> 8) & 0xff);
+	data[3] = value & 0xff;
+
+	ret = i2c_master_send(client, data, 4);
+
+	if (ret == 4)
+		return 0;
+	else
+		pr_err("ret=%d\n", ret);
+	if (ret < 0)
+		return ret;
+	else
+		return -EIO;
+}
+EXPORT_SYMBOL_GPL(rl6347a_hw_write);
+
+int rl6347a_hw_read(void *context, unsigned int reg, unsigned int *value)
+{
+	struct i2c_client *client = context;
+	struct i2c_msg xfer[2];
+	int ret;
+	__be32 be_reg;
+	unsigned int index, vid, buf = 0x0;
+
+	/* handle index registers */
+	if (reg <= 0xff) {
+		rl6347a_hw_write(client, RL6347A_COEF_INDEX, reg);
+		reg = RL6347A_PROC_COEF;
+	}
+
+	reg = reg | 0x80000;
+	vid = (reg >> 8) & 0xfff;
+
+	if (AC_VERB_GET_AMP_GAIN_MUTE == (vid & 0xf00)) {
+		index = (reg >> 8) & 0xf;
+		reg = (reg & ~0xf0f) | index;
+	}
+	be_reg = cpu_to_be32(reg);
+
+	/* Write register */
+	xfer[0].addr = client->addr;
+	xfer[0].flags = 0;
+	xfer[0].len = 4;
+	xfer[0].buf = (u8 *)&be_reg;
+
+	/* Read data */
+	xfer[1].addr = client->addr;
+	xfer[1].flags = I2C_M_RD;
+	xfer[1].len = 4;
+	xfer[1].buf = (u8 *)&buf;
+
+	ret = i2c_transfer(client->adapter, xfer, 2);
+	if (ret < 0)
+		return ret;
+	else if (ret != 2)
+		return -EIO;
+
+	*value = be32_to_cpu(buf);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(rl6347a_hw_read);
+
+MODULE_DESCRIPTION("RL6347A class device shared support");
+MODULE_AUTHOR("Oder Chiou <oder_chiou@realtek.com>");
+MODULE_LICENSE("GPL v2");