1 files changed, 108 insertions, 0 deletions
diff --git a/sound/soc/codecs/rl6347a.c b/sound/soc/codecs/rl6347a.c
new file mode 100644
index 0000000000..fa8ac34549
--- /dev/null
+++ b/sound/soc/codecs/rl6347a.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * rl6347a.c - RL6347A class device shared support
+ *
+ * Copyright 2015 Realtek Semiconductor Corp.
+ *
+ * Author: Oder Chiou <oder_chiou@realtek.com>
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/regmap.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
+		dev_err(&client->dev, "I2C error %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, buf = 0x0;
+	unsigned int index, vid;
+
+	/* 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");