ASoC: add DAI and platform / DMA drivers for SH SIU

Several SuperH platforms, including sh7722, sh7343, sh7354, sh7367 include
a Sound Interface Unit (SIU). This patch adds DAI and platform / DMA
drivers for this interface.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

arch/sh/include/asm/siu.h

+/*
+ * platform header for the SIU ASoC driver
+ *
+ * Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * 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.
+ */
+
+#ifndef ASM_SIU_H
+#define ASM_SIU_H
+
+#include <asm/dma-sh.h>
+
+struct device;
+
+struct siu_platform {
+	struct device *dma_dev;
+	enum sh_dmae_slave_chan_id dma_slave_tx_a;
+	enum sh_dmae_slave_chan_id dma_slave_rx_a;
+	enum sh_dmae_slave_chan_id dma_slave_tx_b;
+	enum sh_dmae_slave_chan_id dma_slave_rx_b;
+};
+
+#endif /* ASM_SIU_H */

sound/soc/sh/Kconfig

@@ -26,6 +26,12 @@ config SND_SOC_SH4_FSI
 	help
 	  This option enables FSI sound support
 
+config SND_SOC_SH4_SIU
+	tristate
+	depends on (SUPERH || ARCH_SHMOBILE) && HAVE_CLK
+	select DMADEVICES
+	select SH_DMAE
+
 ##
 ## Boards
 ##

sound/soc/sh/Makefile

@@ -6,9 +6,11 @@ obj-$(CONFIG_SND_SOC_PCM_SH7760)	+= snd-soc-dma-sh7760.o
 snd-soc-hac-objs	:= hac.o
 snd-soc-ssi-objs	:= ssi.o
 snd-soc-fsi-objs	:= fsi.o
+snd-soc-siu-objs	:= siu_pcm.o siu_dai.o
 obj-$(CONFIG_SND_SOC_SH4_HAC)	+= snd-soc-hac.o
 obj-$(CONFIG_SND_SOC_SH4_SSI)	+= snd-soc-ssi.o
 obj-$(CONFIG_SND_SOC_SH4_FSI)	+= snd-soc-fsi.o
+obj-$(CONFIG_SND_SOC_SH4_SIU)	+= snd-soc-siu.o
 
 ## boards
 snd-soc-sh7760-ac97-objs	:= sh7760-ac97.o

sound/soc/sh/siu.h

+/*
+ * siu.h - ALSA SoC driver for Renesas SH7343, SH7722 SIU peripheral.
+ *
+ * Copyright (C) 2009-2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ * Copyright (C) 2006 Carlos Munoz <carlos@kenati.com>
+ *
+ * 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef SIU_H
+#define SIU_H
+
+/* Common kernel and user-space firmware-building defines and types */
+
+#define YRAM0_SIZE		(0x0040 / 4)		/* 16 */
+#define YRAM1_SIZE		(0x0080 / 4)		/* 32 */
+#define YRAM2_SIZE		(0x0040 / 4)		/* 16 */
+#define YRAM3_SIZE		(0x0080 / 4)		/* 32 */
+#define YRAM4_SIZE		(0x0080 / 4)		/* 32 */
+#define YRAM_DEF_SIZE		(YRAM0_SIZE + YRAM1_SIZE + YRAM2_SIZE + \
+				 YRAM3_SIZE + YRAM4_SIZE)
+#define YRAM_FIR_SIZE		(0x0400 / 4)		/* 256 */
+#define YRAM_IIR_SIZE		(0x0200 / 4)		/* 128 */
+
+#define XRAM0_SIZE		(0x0400 / 4)		/* 256 */
+#define XRAM1_SIZE		(0x0200 / 4)		/* 128 */
+#define XRAM2_SIZE		(0x0200 / 4)		/* 128 */
+
+/* PRAM program array size */
+#define PRAM0_SIZE		(0x0100 / 4)		/* 64 */
+#define PRAM1_SIZE		((0x2000 - 0x0100) / 4)	/* 1984 */
+
+#include <linux/types.h>
+
+struct siu_spb_param {
+	__u32	ab1a;	/* input FIFO address */
+	__u32	ab0a;	/* output FIFO address */
+	__u32	dir;	/* 0=the ather except CPUOUTPUT, 1=CPUINPUT */
+	__u32	event;	/* SPB program starting conditions */
+	__u32	stfifo;	/* STFIFO register setting value */
+	__u32	trdat;	/* TRDAT register setting value */
+};
+
+struct siu_firmware {
+	__u32			yram_fir_coeff[YRAM_FIR_SIZE];
+	__u32			pram0[PRAM0_SIZE];
+	__u32			pram1[PRAM1_SIZE];
+	__u32			yram0[YRAM0_SIZE];
+	__u32			yram1[YRAM1_SIZE];
+	__u32			yram2[YRAM2_SIZE];
+	__u32			yram3[YRAM3_SIZE];
+	__u32			yram4[YRAM4_SIZE];
+	__u32			spbpar_num;
+	struct siu_spb_param	spbpar[32];
+};
+
+#ifdef __KERNEL__
+
+#include <linux/dmaengine.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+#include <asm/dma-sh.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc-dai.h>
+
+#define SIU_PERIOD_BYTES_MAX	8192		/* DMA transfer/period size */
+#define SIU_PERIOD_BYTES_MIN	256		/* DMA transfer/period size */
+#define SIU_PERIODS_MAX		64		/* Max periods in buffer */
+#define SIU_PERIODS_MIN		4		/* Min periods in buffer */
+#define SIU_BUFFER_BYTES_MAX	(SIU_PERIOD_BYTES_MAX * SIU_PERIODS_MAX)
+
+/* SIU ports: only one can be used at a time */
+enum {
+	SIU_PORT_A,
+	SIU_PORT_B,
+	SIU_PORT_NUM,
+};
+
+/* SIU clock configuration */
+enum {
+	SIU_CLKA_PLL,
+	SIU_CLKA_EXT,
+	SIU_CLKB_PLL,
+	SIU_CLKB_EXT
+};
+
+struct siu_info {
+	int			port_id;
+	u32 __iomem		*pram;
+	u32 __iomem		*xram;
+	u32 __iomem		*yram;
+	u32 __iomem		*reg;
+	struct siu_firmware	fw;
+};
+
+struct siu_stream {
+	struct tasklet_struct		tasklet;
+	struct snd_pcm_substream	*substream;
+	snd_pcm_format_t		format;
+	size_t				buf_bytes;
+	size_t				period_bytes;
+	int				cur_period;	/* Period currently in dma */
+	u32				volume;
+	snd_pcm_sframes_t		xfer_cnt;	/* Number of frames */
+	u8				rw_flg;		/* transfer status */
+	/* DMA status */
+	struct dma_chan			*chan;		/* DMA channel */
+	struct dma_async_tx_descriptor	*tx_desc;
+	dma_cookie_t			cookie;
+	struct sh_dmae_slave		param;
+};
+
+struct siu_port {
+	unsigned long		play_cap;	/* Used to track full duplex */
+	struct snd_pcm		*pcm;
+	struct siu_stream	playback;
+	struct siu_stream	capture;
+	u32			stfifo;		/* STFIFO value from firmware */
+	u32			trdat;		/* TRDAT value from firmware */
+};
+
+extern struct siu_port *siu_ports[SIU_PORT_NUM];
+
+static inline struct siu_port *siu_port_info(struct snd_pcm_substream *substream)
+{
+	struct platform_device *pdev =
+		to_platform_device(substream->pcm->card->dev);
+	return siu_ports[pdev->id];
+}
+
+/* Register access */
+static inline void siu_write32(u32 __iomem *addr, u32 val)
+{
+	__raw_writel(val, addr);
+}
+
+static inline u32 siu_read32(u32 __iomem *addr)
+{
+	return __raw_readl(addr);
+}
+
+/* SIU registers */
+#define SIU_IFCTL	(0x000 / sizeof(u32))
+#define SIU_SRCTL	(0x004 / sizeof(u32))
+#define SIU_SFORM	(0x008 / sizeof(u32))
+#define SIU_CKCTL	(0x00c / sizeof(u32))
+#define SIU_TRDAT	(0x010 / sizeof(u32))
+#define SIU_STFIFO	(0x014 / sizeof(u32))
+#define SIU_DPAK	(0x01c / sizeof(u32))
+#define SIU_CKREV	(0x020 / sizeof(u32))
+#define SIU_EVNTC	(0x028 / sizeof(u32))
+#define SIU_SBCTL	(0x040 / sizeof(u32))
+#define SIU_SBPSET	(0x044 / sizeof(u32))
+#define SIU_SBFSTS	(0x068 / sizeof(u32))
+#define SIU_SBDVCA	(0x06c / sizeof(u32))
+#define SIU_SBDVCB	(0x070 / sizeof(u32))
+#define SIU_SBACTIV	(0x074 / sizeof(u32))
+#define SIU_DMAIA	(0x090 / sizeof(u32))
+#define SIU_DMAIB	(0x094 / sizeof(u32))
+#define SIU_DMAOA	(0x098 / sizeof(u32))
+#define SIU_DMAOB	(0x09c / sizeof(u32))
+#define SIU_DMAML	(0x0a0 / sizeof(u32))
+#define SIU_SPSTS	(0x0cc / sizeof(u32))
+#define SIU_SPCTL	(0x0d0 / sizeof(u32))
+#define SIU_BRGASEL	(0x100 / sizeof(u32))
+#define SIU_BRRA	(0x104 / sizeof(u32))
+#define SIU_BRGBSEL	(0x108 / sizeof(u32))
+#define SIU_BRRB	(0x10c / sizeof(u32))
+
+extern struct snd_soc_platform siu_platform;
+extern struct snd_soc_dai siu_i2s_dai;
+
+int siu_init_port(int port, struct siu_port **port_info, struct snd_card *card);
+void siu_free_port(struct siu_port *port_info);
+
+#endif
+
+#endif /* SIU_H */