ASoC: Split s3c2412-i2s.c into core and SoC specific parts

The S3C2412 I2S (IIS) interface is replicated on further Samsung SoC
parts in a broadly compatible way, so split the common code out into
a core called s3c-i2s-v2.[ch] so that the newer SoCs such as the
S3C6410 can make use of it.

As such, all the original s3c2412 functions are currently being left
with their original names, and will be renamed later in the series.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 90 insertions, 0 deletions

diff --git a/sound/soc/s3c24xx/s3c-i2s-v2.h b/sound/soc/s3c24xx/s3c-i2s-v2.h
new file mode 100644
index 00000000000..f66854a77fb
--- /dev/null
+++ b/sound/soc/s3c24xx/s3c-i2s-v2.h
@@ -0,0 +1,90 @@
+/* sound/soc/s3c24xx/s3c-i2s-v2.h
+ *
+ * ALSA Soc Audio Layer - S3C_I2SV2 I2S driver
+ *
+ * Copyright (c) 2007 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ *  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
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+*/
+
+/* This code is the core support for the I2S block found in a number of
+ * Samsung SoC devices which is unofficially named I2S-V2. Currently the
+ * S3C2412 and the S3C64XX series use this block to provide 1 or 2 I2S
+ * channels via configurable GPIO.
+ */
+
+#ifndef __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H
+#define __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H __FILE__
+
+#define S3C_I2SV2_DIV_BCLK	(1)
+#define S3C_I2SV2_DIV_RCLK	(2)
+#define S3C_I2SV2_DIV_PRESCALER	(3)
+
+/**
+ * struct s3c_i2sv2_info - S3C I2S-V2 information
+ * @dev: The parent device passed to use from the probe.
+ * @regs: The pointer to the device registe block.
+ * @master: True if the I2S core is the I2S bit clock master.
+ * @dma_playback: DMA information for playback channel.
+ * @dma_capture: DMA information for capture channel.
+ * @suspend_iismod: PM save for the IISMOD register.
+ * @suspend_iiscon: PM save for the IISCON register.
+ * @suspend_iispsr: PM save for the IISPSR register.
+ *
+ * This is the private codec state for the hardware associated with an
+ * I2S channel such as the register mappings and clock sources.
+ */
+struct s3c_i2sv2_info {
+	struct device	*dev;
+	void __iomem	*regs;
+
+	struct clk	*iis_pclk;
+	struct clk	*iis_cclk;
+	struct clk	*iis_clk;
+
+	unsigned char	 master;
+
+	struct s3c24xx_pcm_dma_params	*dma_playback;
+	struct s3c24xx_pcm_dma_params	*dma_capture;
+
+	u32		 suspend_iismod;
+	u32		 suspend_iiscon;
+	u32		 suspend_iispsr;
+};
+
+struct s3c_i2sv2_rate_calc {
+	unsigned int	clk_div;	/* for prescaler */
+	unsigned int	fs_div;		/* for root frame clock */
+};
+
+extern int s3c_i2sv2_iis_calc_rate(struct s3c_i2sv2_rate_calc *info,
+				   unsigned int *fstab,
+				   unsigned int rate, struct clk *clk);
+
+/**
+ * s3c_i2sv2_probe - probe for i2s device helper
+ * @pdev: The platform device supplied to the original probe.
+ * @dai: The ASoC DAI structure supplied to the original probe.
+ * @i2s: Our local i2s structure to fill in.
+ * @base: The base address for the registers.
+ */
+extern int s3c_i2sv2_probe(struct platform_device *pdev,
+			   struct snd_soc_dai *dai,
+			   struct s3c_i2sv2_info *i2s,
+			   unsigned long base);
+
+/**
+ * s3c_i2sv2_register_dai - register dai with soc core
+ * @dai: The snd_soc_dai structure to register
+ *
+ * Fill in any missing fields and then register the given dai with the
+ * soc core.
+ */
+extern int s3c_i2sv2_register_dai(struct snd_soc_dai *dai);
+
+#endif /* __SND_SOC_S3C24XX_S3C_I2SV2_I2S_H */