[PATCH 2a/4 v2] ASoC: add DAI and platform / DMA drivers for SH SIU

Guennadi Liakhovetski
2010-01-22T18:09:03Z

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>
---

v1 -> v2:

1. splitted off board support into a separate patch
2. made SND_SOC_SH4_SIU a hidden Kconfig variable
3. SND_SOC_SH4_SIU now can be selected on other SuperH platforms, not only
on sh7722
4. moved many defines, that are only used in one of .c-files in those
files
5. prefixed remaining defines in the header with SIU_
6. clarification: "only fixed Left-upper, Left-lower, Right-upper,
Right-lower packing is supported" means - only this byte order is
hard-coded without support for other possible byte-orders
7. clk_put() doesn't mind getting an error code as its argument, but moved
it under the respective "if" just in case;)
8. removed mono-emulation via data-copying. Looking for a recipe to achive
this via alsa-configuration, anyone?

diff --git a/arch/sh/include/asm/siu.h b/arch/sh/include/asm/siu.h
new file mode 100644
index 0000000..57565a3
--- /dev/null
+++ b/arch/sh/include/asm/siu.h
@@ -0,0 +1,26 @@
+/*
+ * 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 */
diff --git a/sound/soc/sh/Kconfig b/sound/soc/sh/Kconfig
index 8072a6d..a86696b 100644
--- a/sound/soc/sh/Kconfig
+++ b/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
##
diff --git a/sound/soc/sh/Makefile b/sound/soc/sh/Makefile
index 1d0ec0a..8a5a192 100644
--- a/sound/soc/sh/Makefile
+++ b/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
diff --git a/sound/soc/sh/siu.h b/sound/soc/sh/siu.h
new file mode 100644
index 0000000..9cc04ab
--- /dev/null
+++ b/sound/soc/sh/siu.h
@@ -0,0 +1,193 @@
+/*
+ * 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 */
diff --git a/sound/soc/sh/siu_dai.c b/sound/soc/sh/siu_dai.c
new file mode 100644
index 0000000..5452d19
--- /dev/null
+++ b/sound/soc/sh/siu_dai.c
@@ -0,0 +1,847 @@
+/*
+ * siu_dai.c - 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.
+ */
+
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/pm_runtime.h>
+
+#include <asm/clock.h>
+#include <asm/siu.h>
+
+#include <sound/control.h>
+#include <sound/soc-dai.h>
+
+#include "siu.h"
+
+/* Board specifics */
+#if defined(CONFIG_CPU_SUBTYPE_SH7722)
+# define SIU_MAX_VOLUME 0x1000
+#else
+# define SIU_MAX_VOLUME 0x7fff
+#endif
+
+#define PRAM_SIZE 0x2000
+#define XRAM_SIZE 0x800
+#define YRAM_SIZE 0x800
+
+#define XRAM_OFFSET 0x4000
+#define YRAM_OFFSET 0x6000
+#define REG_OFFSET 0xc000
+
+#define PLAYBACK_ENABLED 1
+#define CAPTURE_ENABLED 2
+
+#define VOLUME_CAPTURE 0
+#define VOLUME_PLAYBACK 1
+#define DFLT_VOLUME_LEVEL 0x08000800
+
+/*
+ * SPDIF is only available on port A and on some SIU implementations it is only
+ * available for input. Due to the lack of hardware to test it, SPDIF is left
+ * disabled in this driver version
+ */
+struct format_flag {
+ u32 i2s;
+ u32 pcm;
+ u32 spdif;
+ u32 mask;
+};
+
+struct port_flag {
+ struct format_flag playback;
+ struct format_flag capture;
+};
+
+static struct port_flag siu_flags[SIU_PORT_NUM] = {
+ [SIU_PORT_A] = {
+ .playback = {
+ .i2s = 0x50000000,
+ .pcm = 0x40000000,
+ .spdif = 0x80000000, /* not on all SIU versions */
+ .mask = 0xd0000000,
+ },
+ .capture = {
+ .i2s = 0x05000000,
+ .pcm = 0x04000000,
+ .spdif = 0x08000000,
+ .mask = 0x0d000000,
+ },
+ },
+ [SIU_PORT_B] = {
+ .playback = {
+ .i2s = 0x00500000,
+ .pcm = 0x00400000,
+ .spdif = 0, /* impossible - turn off */
+ .mask = 0x00500000,
+ },
+ .capture = {
+ .i2s = 0x00050000,
+ .pcm = 0x00040000,
+ .spdif = 0, /* impossible - turn off */
+ .mask = 0x00050000,
+ },
+ },
+};
+
+static void siu_dai_start(struct siu_port *port_info)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+
+ dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);
+
+ /* Turn on SIU clock */
+ pm_runtime_get_sync(siu_i2s_dai.dev);
+
+ /* Issue software reset to siu */
+ siu_write32(base + SIU_SRCTL, 0);
+
+ /* Wait for the reset to take effect */
+ udelay(1);
+
+ port_info->stfifo = 0;
+ port_info->trdat = 0;
+
+ /* portA, portB, SIU operate */
+ siu_write32(base + SIU_SRCTL, 0x301);
+
+ /* portA%6fs, portB%6fs */
+ siu_write32(base + SIU_CKCTL, 0x40400000);
+
+ /* portA's BRG does not divide SIUCKA */
+ siu_write32(base + SIU_BRGASEL, 0);
+ siu_write32(base + SIU_BRRA, 0);
+
+ /* portB's BRG divides SIUCKB by half */
+ siu_write32(base + SIU_BRGBSEL, 1);
+ siu_write32(base + SIU_BRRB, 0);
+
+ siu_write32(base + SIU_IFCTL, 0x44440000);
+
+ /* portA: 32 bit/fs, master; portB: 32 bit/fs, master */
+ siu_write32(base + SIU_SFORM, 0x0c0c0000);
+
+ /*
+ * Volume levels: looks like the DSP firmware implements volume controls
+ * differently from what's described in the datasheet
+ */
+ siu_write32(base + SIU_SBDVCA, port_info->playback.volume);
+ siu_write32(base + SIU_SBDVCB, port_info->capture.volume);
+}
+
+static void siu_dai_stop(void)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+
+ /* SIU software reset */
+ siu_write32(base + SIU_SRCTL, 0);
+
+ /* Turn off SIU clock */
+ pm_runtime_put_sync(siu_i2s_dai.dev);
+}
+
+static void siu_dai_spbAselect(struct siu_port *port_info)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct siu_firmware *fw = &info->fw;
+ u32 *ydef = fw->yram0;
+ u32 idx;
+
+ /* path A use */
+ if (!info->port_id)
+ idx = 1; /* portA */
+ else
+ idx = 2; /* portB */
+
+ ydef[0] = (fw->spbpar[idx].ab1a << 16) |
+ (fw->spbpar[idx].ab0a << 8) |
+ (fw->spbpar[idx].dir << 7) | 3;
+ ydef[1] = fw->yram0[1]; /* 0x03000300 */
+ ydef[2] = (16 / 2) << 24;
+ ydef[3] = fw->yram0[3]; /* 0 */
+ ydef[4] = fw->yram0[4]; /* 0 */
+ ydef[7] = fw->spbpar[idx].event;
+ port_info->stfifo |= fw->spbpar[idx].stfifo;
+ port_info->trdat |= fw->spbpar[idx].trdat;
+}
+
+static void siu_dai_spbBselect(struct siu_port *port_info)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct siu_firmware *fw = &info->fw;
+ u32 *ydef = fw->yram0;
+ u32 idx;
+
+ /* path B use */
+ if (!info->port_id)
+ idx = 7; /* portA */
+ else
+ idx = 8; /* portB */
+
+ ydef[5] = (fw->spbpar[idx].ab1a << 16) |
+ (fw->spbpar[idx].ab0a << 8) | 1;
+ ydef[6] = fw->spbpar[idx].event;
+ port_info->stfifo |= fw->spbpar[idx].stfifo;
+ port_info->trdat |= fw->spbpar[idx].trdat;
+}
+
+static void siu_dai_open(struct siu_stream *siu_stream)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+ u32 srctl, ifctl;
+
+ srctl = siu_read32(base + SIU_SRCTL);
+ ifctl = siu_read32(base + SIU_IFCTL);
+
+ switch (info->port_id) {
+ case SIU_PORT_A:
+ /* portA operates */
+ srctl |= 0x200;
+ ifctl &= ~0xc2;
+ break;
+ case SIU_PORT_B:
+ /* portB operates */
+ srctl |= 0x100;
+ ifctl &= ~0x31;
+ break;
+ }
+
+ siu_write32(base + SIU_SRCTL, srctl);
+ /* Unmute and configure portA */
+ siu_write32(base + SIU_IFCTL, ifctl);
+}
+
+/*
+ * At the moment only fixed Left-upper, Left-lower, Right-upper, Right-lower
+ * packing is supported
+ */
+static void siu_dai_pcmdatapack(struct siu_stream *siu_stream)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+ u32 dpak;
+
+ dpak = siu_read32(base + SIU_DPAK);
+
+ switch (info->port_id) {
+ case SIU_PORT_A:
+ dpak &= ~0xc0000000;
+ break;
+ case SIU_PORT_B:
+ dpak &= ~0x00c00000;
+ break;
+ }
+
+ siu_write32(base + SIU_DPAK, dpak);
+}
+
+static int siu_dai_spbstart(struct siu_port *port_info)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+ struct siu_firmware *fw = &info->fw;
+ u32 *ydef = fw->yram0;
+ int cnt;
+ u32 __iomem *add;
+ u32 *ptr;
+
+ /* Load SPB Program in PRAM */
+ ptr = fw->pram0;
+ add = info->pram;
+ for (cnt = 0; cnt < PRAM0_SIZE; cnt++, add++, ptr++)
+ siu_write32(add, *ptr);
+
+ ptr = fw->pram1;
+ add = info->pram + (0x0100 / sizeof(u32));
+ for (cnt = 0; cnt < PRAM1_SIZE; cnt++, add++, ptr++)
+ siu_write32(add, *ptr);
+
+ /* XRAM initialization */
+ add = info->xram;
+ for (cnt = 0; cnt < XRAM0_SIZE + XRAM1_SIZE + XRAM2_SIZE; cnt++, add++)
+ siu_write32(add, 0);
+
+ /* YRAM variable area initialization */
+ add = info->yram;
+ for (cnt = 0; cnt < YRAM_DEF_SIZE; cnt++, add++)
+ siu_write32(add, ydef[cnt]);
+
+ /* YRAM FIR coefficient area initialization */
+ add = info->yram + (0x0200 / sizeof(u32));
+ for (cnt = 0; cnt < YRAM_FIR_SIZE; cnt++, add++)
+ siu_write32(add, fw->yram_fir_coeff[cnt]);
+
+ /* YRAM IIR coefficient area initialization */
+ add = info->yram + (0x0600 / sizeof(u32));
+ for (cnt = 0; cnt < YRAM_IIR_SIZE; cnt++, add++)
+ siu_write32(add, 0);
+
+ siu_write32(base + SIU_TRDAT, port_info->trdat);
+ port_info->trdat = 0x0;
+
+
+ /* SPB start condition: software */
+ siu_write32(base + SIU_SBACTIV, 0);
+ /* Start SPB */
+ siu_write32(base + SIU_SBCTL, 0xc0000000);
+ /* Wait for program to halt */
+ cnt = 0x10000;
+ while (--cnt && siu_read32(base + SIU_SBCTL) != 0x80000000)
+ cpu_relax();
+
+ if (!cnt)
+ return -EBUSY;
+
+ /* SPB program start address setting */
+ siu_write32(base + SIU_SBPSET, 0x00400000);
+ /* SPB hardware start(FIFOCTL source) */
+ siu_write32(base + SIU_SBACTIV, 0xc0000000);
+
+ return 0;
+}
+
+static void siu_dai_spbstop(struct siu_port *port_info)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+
+ siu_write32(base + SIU_SBACTIV, 0);
+ /* SPB stop */
+ siu_write32(base + SIU_SBCTL, 0);
+
+ port_info->stfifo = 0;
+}
+
+/* API functions */
+
+/* Playback and capture hardware properties are identical */
+static struct snd_pcm_hardware siu_dai_pcm_hw = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED,
+ .formats = SNDRV_PCM_FMTBIT_S16,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ .rate_min = 8000,
+ .rate_max = 48000,
+ .channels_min = 2,
+ .channels_max = 2,
+ .buffer_bytes_max = SIU_BUFFER_BYTES_MAX,
+ .period_bytes_min = SIU_PERIOD_BYTES_MIN,
+ .period_bytes_max = SIU_PERIOD_BYTES_MAX,
+ .periods_min = SIU_PERIODS_MIN,
+ .periods_max = SIU_PERIODS_MAX,
+};
+
+static int siu_dai_info_volume(struct snd_kcontrol *kctrl,
+ struct snd_ctl_elem_info *uinfo)
+{
+ struct siu_port *port_info = snd_kcontrol_chip(kctrl);
+
+ dev_dbg(port_info->pcm->card->dev, "%s\n", __func__);
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 2;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = SIU_MAX_VOLUME;
+
+ return 0;
+}
+
+static int siu_dai_get_volume(struct snd_kcontrol *kctrl,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct siu_port *port_info = snd_kcontrol_chip(kctrl);
+ struct device *dev = port_info->pcm->card->dev;
+ u32 vol;
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ switch (kctrl->private_value) {
+ case VOLUME_PLAYBACK:
+ /* Playback is always on port 0 */
+ vol = port_info->playback.volume;
+ ucontrol->value.integer.value[0] = vol & 0xffff;
+ ucontrol->value.integer.value[1] = vol >> 16 & 0xffff;
+ break;
+ case VOLUME_CAPTURE:
+ /* Capture is always on port 1 */
+ vol = port_info->capture.volume;
+ ucontrol->value.integer.value[0] = vol & 0xffff;
+ ucontrol->value.integer.value[1] = vol >> 16 & 0xffff;
+ break;
+ default:
+ dev_err(dev, "%s() invalid private_value=%ld\n",
+ __func__, kctrl->private_value);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int siu_dai_put_volume(struct snd_kcontrol *kctrl,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct siu_port *port_info = snd_kcontrol_chip(kctrl);
+ struct device *dev = port_info->pcm->card->dev;
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+ u32 new_vol;
+ u32 cur_vol;
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ if (ucontrol->value.integer.value[0] < 0 ||
+ ucontrol->value.integer.value[0] > SIU_MAX_VOLUME ||
+ ucontrol->value.integer.value[1] < 0 ||
+ ucontrol->value.integer.value[1] > SIU_MAX_VOLUME)
+ return -EINVAL;
+
+ new_vol = ucontrol->value.integer.value[0] |
+ ucontrol->value.integer.value[1] << 16;
+
+ /* See comment above - DSP firmware implementation */
+ switch (kctrl->private_value) {
+ case VOLUME_PLAYBACK:
+ /* Playback is always on port 0 */
+ cur_vol = port_info->playback.volume;
+ siu_write32(base + SIU_SBDVCA, new_vol);
+ port_info->playback.volume = new_vol;
+ break;
+ case VOLUME_CAPTURE:
+ /* Capture is always on port 1 */
+ cur_vol = port_info->capture.volume;
+ siu_write32(base + SIU_SBDVCB, new_vol);
+ port_info->capture.volume = new_vol;
+ break;
+ default:
+ dev_err(dev, "%s() invalid private_value=%ld\n",
+ __func__, kctrl->private_value);
+ return -EINVAL;
+ }
+
+ if (cur_vol != new_vol)
+ return 1;
+
+ return 0;
+}
+
+static struct snd_kcontrol_new playback_controls = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "PCM Playback Volume",
+ .index = 0,
+ .info = siu_dai_info_volume,
+ .get = siu_dai_get_volume,
+ .put = siu_dai_put_volume,
+ .private_value = VOLUME_PLAYBACK,
+};
+
+static struct snd_kcontrol_new capture_controls = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "PCM Capture Volume",
+ .index = 0,
+ .info = siu_dai_info_volume,
+ .get = siu_dai_get_volume,
+ .put = siu_dai_put_volume,
+ .private_value = VOLUME_CAPTURE,
+};
+
+int siu_init_port(int port, struct siu_port **port_info, struct snd_card *card)
+{
+ struct device *dev = card->dev;
+ struct snd_kcontrol *kctrl;
+ int ret;
+
+ *port_info = kzalloc(sizeof(**port_info), GFP_KERNEL);
+ if (!*port_info)
+ return -ENOMEM;
+
+ dev_dbg(dev, "%s: port #%d@%p\n", __func__, port, *port_info);
+
+ (*port_info)->playback.volume = DFLT_VOLUME_LEVEL;
+ (*port_info)->capture.volume = DFLT_VOLUME_LEVEL;
+
+ /*
+ * Add mixer support. The SPB is used to change the volume. Both
+ * ports use the same SPB. Therefore, we only register one
+ * control instance since it will be used by both channels.
+ * In error case we continue without controls.
+ */
+ kctrl = snd_ctl_new1(&playback_controls, *port_info);
+ ret = snd_ctl_add(card, kctrl);
+ if (ret < 0)
+ dev_err(dev,
+ "failed to add playback controls %p port=%d err=%d\n",
+ kctrl, port, ret);
+
+ kctrl = snd_ctl_new1(&capture_controls, *port_info);
+ ret = snd_ctl_add(card, kctrl);
+ if (ret < 0)
+ dev_err(dev,
+ "failed to add capture controls %p port=%d err=%d\n",
+ kctrl, port, ret);
+
+ return 0;
+}
+
+void siu_free_port(struct siu_port *port_info)
+{
+ kfree(port_info);
+}
+
+static int siu_dai_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct snd_pcm_runtime *rt = substream->runtime;
+ struct siu_port *port_info = siu_port_info(substream);
+ int ret;
+
+ dev_dbg(substream->pcm->card->dev, "%s: port=%d@%p\n", __func__,
+ info->port_id, port_info);
+
+ snd_soc_set_runtime_hwparams(substream, &siu_dai_pcm_hw);
+
+ ret = snd_pcm_hw_constraint_integer(rt, SNDRV_PCM_HW_PARAM_PERIODS);
+ if (unlikely(ret < 0))
+ return ret;
+
+ siu_dai_start(port_info);
+
+ return 0;
+}
+
+static void siu_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct siu_port *port_info = siu_port_info(substream);
+
+ dev_dbg(substream->pcm->card->dev, "%s: port=%d@%p\n", __func__,
+ info->port_id, port_info);
+
+ if (substream->stream = SNDRV_PCM_STREAM_PLAYBACK)
+ port_info->play_cap &= ~PLAYBACK_ENABLED;
+ else
+ port_info->play_cap &= ~CAPTURE_ENABLED;
+
+ /* Stop the siu if the other stream is not using it */
+ if (!port_info->play_cap) {
+ /* during stmread or stmwrite ? */
+ BUG_ON(port_info->playback.rw_flg || port_info->capture.rw_flg);
+ siu_dai_spbstop(port_info);
+ siu_dai_stop();
+ }
+}
+
+/* PCM part of siu_dai_playback_prepare() / siu_dai_capture_prepare() */
+static int siu_dai_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct snd_pcm_runtime *rt = substream->runtime;
+ struct siu_port *port_info = siu_port_info(substream);
+ struct siu_stream *siu_stream;
+ int self, ret;
+
+ dev_dbg(substream->pcm->card->dev,
+ "%s: port %d, active streams %lx, %d channels\n",
+ __func__, info->port_id, port_info->play_cap, rt->channels);
+
+ if (substream->stream = SNDRV_PCM_STREAM_PLAYBACK) {
+ self = PLAYBACK_ENABLED;
+ siu_stream = &port_info->playback;
+ } else {
+ self = CAPTURE_ENABLED;
+ siu_stream = &port_info->capture;
+ }
+
+ /* Set up the siu if not already done */
+ if (!port_info->play_cap) {
+ siu_stream->rw_flg = 0; /* stream-data transfer flag */
+
+ siu_dai_spbAselect(port_info);
+ siu_dai_spbBselect(port_info);
+
+ siu_dai_open(siu_stream);
+
+ siu_dai_pcmdatapack(siu_stream);
+
+ ret = siu_dai_spbstart(port_info);
+ if (ret < 0)
+ goto fail;
+ }
+
+ port_info->play_cap |= self;
+
+fail:
+ return ret;
+}
+
+/*
+ * SIU can set bus format to I2S / PCM / SPDIF independently for playback and
+ * capture, however, the current API sets the bus format globally for a DAI.
+ */
+static int siu_dai_set_fmt(struct snd_soc_dai *dai,
+ unsigned int fmt)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+ u32 ifctl;
+
+ dev_dbg(dai->dev, "%s: fmt 0x%x on port %d\n",
+ __func__, fmt, info->port_id);
+
+ if (info->port_id < 0)
+ return -ENODEV;
+
+ /* Here select between I2S / PCM / SPDIF */
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ ifctl = siu_flags[info->port_id].playback.i2s |
+ siu_flags[info->port_id].capture.i2s;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ ifctl = siu_flags[info->port_id].playback.pcm |
+ siu_flags[info->port_id].capture.pcm;
+ break;
+ /* SPDIF disabled - see comment at the top */
+ default:
+ return -EINVAL;
+ }
+
+ ifctl |= ~(siu_flags[info->port_id].playback.mask |
+ siu_flags[info->port_id].capture.mask) &
+ siu_read32(base + SIU_IFCTL);
+ siu_write32(base + SIU_IFCTL, ifctl);
+
+ return 0;
+}
+
+static int siu_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
+ unsigned int freq, int dir)
+{
+ struct clk *siu_clk, *parent_clk;
+ char *siu_name, *parent_name;
+ int ret;
+
+ if (dir != SND_SOC_CLOCK_IN)
+ return -EINVAL;
+
+ dev_dbg(dai->dev, "%s: using clock %d\n", __func__, clk_id);
+
+ switch (clk_id) {
+ case SIU_CLKA_PLL:
+ siu_name = "siua_clk";
+ parent_name = "pll_clk";
+ break;
+ case SIU_CLKA_EXT:
+ siu_name = "siua_clk";
+ parent_name = "siumcka_clk";
+ break;
+ case SIU_CLKB_PLL:
+ siu_name = "siub_clk";
+ parent_name = "pll_clk";
+ break;
+ case SIU_CLKB_EXT:
+ siu_name = "siub_clk";
+ parent_name = "siumckb_clk";
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ siu_clk = clk_get(siu_i2s_dai.dev, siu_name);
+ if (IS_ERR(siu_clk))
+ return PTR_ERR(siu_clk);
+
+ parent_clk = clk_get(siu_i2s_dai.dev, parent_name);
+ if (!IS_ERR(parent_clk)) {
+ ret = clk_set_parent(siu_clk, parent_clk);
+ if (!ret)
+ clk_set_rate(siu_clk, freq);
+ clk_put(parent_clk);
+ }
+
+ clk_put(siu_clk);
+
+ return 0;
+}
+
+static struct snd_soc_dai_ops siu_dai_ops = {
+ .startup = siu_dai_startup,
+ .shutdown = siu_dai_shutdown,
+ .prepare = siu_dai_prepare,
+ .set_sysclk = siu_dai_set_sysclk,
+ .set_fmt = siu_dai_set_fmt,
+};
+
+struct snd_soc_dai siu_i2s_dai = {
+ .name = "sh-siu",
+ .id = 0,
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .formats = SNDRV_PCM_FMTBIT_S16,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ },
+ .capture = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .formats = SNDRV_PCM_FMTBIT_S16,
+ .rates = SNDRV_PCM_RATE_8000_48000,
+ },
+ .ops = &siu_dai_ops,
+};
+EXPORT_SYMBOL_GPL(siu_i2s_dai);
+
+static int __devinit siu_probe(struct platform_device *pdev)
+{
+ const struct firmware *fw_entry;
+ struct resource *res, *region;
+ struct siu_info *info;
+ int ret;
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ ret = request_firmware(&fw_entry, "siu_spb.bin", &pdev->dev);
+ if (ret)
+ goto ereqfw;
+
+ /*
+ * Loaded firmware is "const" - read only, but we have to modify it in
+ * snd_siu_sh7343_spbAselect() and snd_siu_sh7343_spbBselect()
+ */
+ memcpy(&info->fw, fw_entry->data, fw_entry->size);
+
+ release_firmware(fw_entry);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ ret = -ENODEV;
+ goto egetres;
+ }
+
+ region = request_mem_region(res->start, resource_size(res),
+ pdev->name);
+ if (!region) {
+ dev_err(&pdev->dev, "SIU region already claimed\n");
+ ret = -EBUSY;
+ goto ereqmemreg;
+ }
+
+ ret = -ENOMEM;
+ info->pram = ioremap(res->start, PRAM_SIZE);
+ if (!info->pram)
+ goto emappram;
+ info->xram = ioremap(res->start + XRAM_OFFSET, XRAM_SIZE);
+ if (!info->xram)
+ goto emapxram;
+ info->yram = ioremap(res->start + YRAM_OFFSET, YRAM_SIZE);
+ if (!info->yram)
+ goto emapyram;
+ info->reg = ioremap(res->start + REG_OFFSET, resource_size(res) -
+ REG_OFFSET);
+ if (!info->reg)
+ goto emapreg;
+
+ siu_i2s_dai.dev = &pdev->dev;
+ siu_i2s_dai.private_data = info;
+
+ ret = snd_soc_register_dais(&siu_i2s_dai, 1);
+ if (ret < 0)
+ goto edaiinit;
+
+ ret = snd_soc_register_platform(&siu_platform);
+ if (ret < 0)
+ goto esocregp;
+
+ pm_runtime_enable(&pdev->dev);
+
+ return ret;
+
+esocregp:
+ snd_soc_unregister_dais(&siu_i2s_dai, 1);
+edaiinit:
+ iounmap(info->reg);
+emapreg:
+ iounmap(info->yram);
+emapyram:
+ iounmap(info->xram);
+emapxram:
+ iounmap(info->pram);
+emappram:
+ release_mem_region(res->start, resource_size(res));
+ereqmemreg:
+egetres:
+ereqfw:
+ kfree(info);
+
+ return ret;
+}
+
+static int __devexit siu_remove(struct platform_device *pdev)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct resource *res;
+
+ pm_runtime_disable(&pdev->dev);
+
+ snd_soc_unregister_platform(&siu_platform);
+ snd_soc_unregister_dais(&siu_i2s_dai, 1);
+
+ iounmap(info->reg);
+ iounmap(info->yram);
+ iounmap(info->xram);
+ iounmap(info->pram);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res)
+ release_mem_region(res->start, resource_size(res));
+ kfree(info);
+
+ return 0;
+}
+
+static struct platform_driver siu_driver = {
+ .driver = {
+ .name = "sh_siu",
+ },
+ .probe = siu_probe,
+ .remove = __devexit_p(siu_remove),
+};
+
+static int __init siu_init(void)
+{
+ return platform_driver_register(&siu_driver);
+}
+
+static void __exit siu_exit(void)
+{
+ platform_driver_unregister(&siu_driver);
+}
+
+module_init(siu_init)
+module_exit(siu_exit)
+
+MODULE_AUTHOR("Carlos Munoz <carlos@kenati.com>");
+MODULE_DESCRIPTION("ALSA SoC SH7722 SIU driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/sh/siu_pcm.c b/sound/soc/sh/siu_pcm.c
new file mode 100644
index 0000000..c5efc30
--- /dev/null
+++ b/sound/soc/sh/siu_pcm.c
@@ -0,0 +1,616 @@
+/*
+ * siu_pcm.c - ALSA 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.
+ */
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <sound/control.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc-dai.h>
+
+#include <asm/dma-sh.h>
+#include <asm/siu.h>
+
+#include "siu.h"
+
+#define GET_MAX_PERIODS(buf_bytes, period_bytes) \
+ ((buf_bytes) / (period_bytes))
+#define PERIOD_OFFSET(buf_addr, period_num, period_bytes) \
+ ((buf_addr) + ((period_num) * (period_bytes)))
+
+#define RWF_STM_RD 0x01 /* Read in progress */
+#define RWF_STM_WT 0x02 /* Write in progress */
+
+struct siu_port *siu_ports[SIU_PORT_NUM];
+
+/* transfersize is number of u32 dma transfers per period */
+static int siu_pcm_stmwrite_stop(struct siu_port *port_info)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+ struct siu_stream *siu_stream = &port_info->playback;
+ u32 stfifo;
+
+ if (!siu_stream->rw_flg)
+ return -EPERM;
+
+ /* output FIFO disable */
+ stfifo = siu_read32(base + SIU_STFIFO);
+ siu_write32(base + SIU_STFIFO, stfifo & ~0x0c180c18);
+ pr_debug("%s: STFIFO %x -> %x\n", __func__,
+ stfifo, stfifo & ~0x0c180c18);
+
+ /* during stmwrite clear */
+ siu_stream->rw_flg = 0;
+
+ return 0;
+}
+
+static int siu_pcm_stmwrite_start(struct siu_port *port_info)
+{
+ struct siu_stream *siu_stream = &port_info->playback;
+
+ if (siu_stream->rw_flg)
+ return -EPERM;
+
+ /* Current period in buffer */
+ port_info->playback.cur_period = 0;
+
+ /* during stmwrite flag set */
+ siu_stream->rw_flg = RWF_STM_WT;
+
+ /* DMA transfer start */
+ tasklet_schedule(&siu_stream->tasklet);
+
+ return 0;
+}
+
+static void siu_dma_tx_complete(void *arg)
+{
+ struct siu_stream *siu_stream = arg;
+
+ if (!siu_stream->rw_flg)
+ return;
+
+ /* Update completed period count */
+ if (++siu_stream->cur_period >+ GET_MAX_PERIODS(siu_stream->buf_bytes,
+ siu_stream->period_bytes))
+ siu_stream->cur_period = 0;
+
+ pr_debug("%s: done period #%d (%u/%u bytes), cookie %d\n",
+ __func__, siu_stream->cur_period,
+ siu_stream->cur_period * siu_stream->period_bytes,
+ siu_stream->buf_bytes, siu_stream->cookie);
+
+ tasklet_schedule(&siu_stream->tasklet);
+
+ /* Notify alsa: a period is done */
+ snd_pcm_period_elapsed(siu_stream->substream);
+}
+
+static int siu_pcm_wr_set(struct siu_port *port_info,
+ dma_addr_t buff, u32 size)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+ struct siu_stream *siu_stream = &port_info->playback;
+ struct snd_pcm_substream *substream = siu_stream->substream;
+ struct device *dev = substream->pcm->card->dev;
+ struct dma_async_tx_descriptor *desc;
+ dma_cookie_t cookie;
+ struct scatterlist sg;
+ u32 stfifo;
+
+ sg_init_table(&sg, 1);
+ sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)),
+ size, offset_in_page(buff));
+ sg_dma_address(&sg) = buff;
+
+ desc = siu_stream->chan->device->device_prep_slave_sg(siu_stream->chan,
+ &sg, 1, DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ if (!desc) {
+ dev_err(dev, "Failed to allocate a dma descriptor\n");
+ return -ENOMEM;
+ }
+
+ desc->callback = siu_dma_tx_complete;
+ desc->callback_param = siu_stream;
+ cookie = desc->tx_submit(desc);
+ if (cookie < 0) {
+ dev_err(dev, "Failed to submit a dma transfer\n");
+ return cookie;
+ }
+
+ siu_stream->tx_desc = desc;
+ siu_stream->cookie = cookie;
+
+ dma_async_issue_pending(siu_stream->chan);
+
+ /* only output FIFO enable */
+ stfifo = siu_read32(base + SIU_STFIFO);
+ siu_write32(base + SIU_STFIFO, stfifo | (port_info->stfifo & 0x0c180c18));
+ dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
+ stfifo, stfifo | (port_info->stfifo & 0x0c180c18));
+
+ return 0;
+}
+
+static int siu_pcm_rd_set(struct siu_port *port_info,
+ dma_addr_t buff, size_t size)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+ struct siu_stream *siu_stream = &port_info->capture;
+ struct snd_pcm_substream *substream = siu_stream->substream;
+ struct device *dev = substream->pcm->card->dev;
+ struct dma_async_tx_descriptor *desc;
+ dma_cookie_t cookie;
+ struct scatterlist sg;
+ u32 stfifo;
+
+ dev_dbg(dev, "%s: %u@%llx\n", __func__, size, (unsigned long long)buff);
+
+ sg_init_table(&sg, 1);
+ sg_set_page(&sg, pfn_to_page(PFN_DOWN(buff)),
+ size, offset_in_page(buff));
+ sg_dma_address(&sg) = buff;
+
+ desc = siu_stream->chan->device->device_prep_slave_sg(siu_stream->chan,
+ &sg, 1, DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+ if (!desc) {
+ dev_err(dev, "Failed to allocate dma descriptor\n");
+ return -ENOMEM;
+ }
+
+ desc->callback = siu_dma_tx_complete;
+ desc->callback_param = siu_stream;
+ cookie = desc->tx_submit(desc);
+ if (cookie < 0) {
+ dev_err(dev, "Failed to submit dma descriptor\n");
+ return cookie;
+ }
+
+ siu_stream->tx_desc = desc;
+ siu_stream->cookie = cookie;
+
+ dma_async_issue_pending(siu_stream->chan);
+
+ /* only input FIFO enable */
+ stfifo = siu_read32(base + SIU_STFIFO);
+ siu_write32(base + SIU_STFIFO, siu_read32(base + SIU_STFIFO) |
+ (port_info->stfifo & 0x13071307));
+ dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
+ stfifo, stfifo | (port_info->stfifo & 0x13071307));
+
+ return 0;
+}
+
+static void siu_io_tasklet(unsigned long data)
+{
+ struct siu_stream *siu_stream = (struct siu_stream *)data;
+ struct snd_pcm_substream *substream = siu_stream->substream;
+ struct device *dev = substream->pcm->card->dev;
+ struct snd_pcm_runtime *rt = substream->runtime;
+ struct siu_port *port_info = siu_port_info(substream);
+
+ dev_dbg(dev, "%s: flags %x\n", __func__, siu_stream->rw_flg);
+
+ if (!siu_stream->rw_flg) {
+ dev_dbg(dev, "%s: stream inactive\n", __func__);
+ return;
+ }
+
+ if (substream->stream = SNDRV_PCM_STREAM_CAPTURE) {
+ dma_addr_t buff;
+ size_t count;
+ u8 *virt;
+
+ buff = (dma_addr_t)PERIOD_OFFSET(rt->dma_addr,
+ siu_stream->cur_period,
+ siu_stream->period_bytes);
+ virt = PERIOD_OFFSET(rt->dma_area,
+ siu_stream->cur_period,
+ siu_stream->period_bytes);
+ count = siu_stream->period_bytes;
+
+ /* DMA transfer start */
+ siu_pcm_rd_set(port_info, buff, count);
+ } else {
+ siu_pcm_wr_set(port_info,
+ (dma_addr_t)PERIOD_OFFSET(rt->dma_addr,
+ siu_stream->cur_period,
+ siu_stream->period_bytes),
+ siu_stream->period_bytes);
+ }
+}
+
+/* Capture */
+static int siu_pcm_stmread_start(struct siu_port *port_info)
+{
+ struct siu_stream *siu_stream = &port_info->capture;
+
+ if (siu_stream->xfer_cnt > 0x1000000)
+ return -EINVAL;
+ if (siu_stream->rw_flg)
+ return -EPERM;
+
+ /* Current period in buffer */
+ siu_stream->cur_period = 0;
+
+ /* during stmread flag set */
+ siu_stream->rw_flg = RWF_STM_RD;
+
+ tasklet_schedule(&siu_stream->tasklet);
+
+ return 0;
+}
+
+static int siu_pcm_stmread_stop(struct siu_port *port_info)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+ struct siu_stream *siu_stream = &port_info->capture;
+ struct device *dev = siu_stream->substream->pcm->card->dev;
+ u32 stfifo;
+
+ if (!siu_stream->rw_flg)
+ return -EPERM;
+
+ /* input FIFO disable */
+ stfifo = siu_read32(base + SIU_STFIFO);
+ siu_write32(base + SIU_STFIFO, stfifo & ~0x13071307);
+ dev_dbg(dev, "%s: STFIFO %x -> %x\n", __func__,
+ stfifo, stfifo & ~0x13071307);
+
+ /* during stmread flag clear */
+ siu_stream->rw_flg = 0;
+
+ return 0;
+}
+
+static int siu_pcm_hw_params(struct snd_pcm_substream *ss,
+ struct snd_pcm_hw_params *hw_params)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct device *dev = ss->pcm->card->dev;
+ int ret;
+
+ dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
+
+ ret = snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
+ if (ret < 0)
+ dev_err(dev, "snd_pcm_lib_malloc_pages() failed\n");
+
+ return ret;
+}
+
+static int siu_pcm_hw_free(struct snd_pcm_substream *ss)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct siu_port *port_info = siu_port_info(ss);
+ struct device *dev = ss->pcm->card->dev;
+ struct siu_stream *siu_stream;
+
+ if (ss->stream = SNDRV_PCM_STREAM_PLAYBACK)
+ siu_stream = &port_info->playback;
+ else
+ siu_stream = &port_info->capture;
+
+ dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
+
+ return snd_pcm_lib_free_pages(ss);
+}
+
+static bool filter(struct dma_chan *chan, void *slave)
+{
+ struct sh_dmae_slave *param = slave;
+
+ pr_debug("%s: slave ID %d\n", __func__, param->slave_id);
+
+ if (unlikely(param->dma_dev != chan->device->dev))
+ return false;
+
+ chan->private = param;
+ return true;
+}
+
+static int siu_pcm_open(struct snd_pcm_substream *ss)
+{
+ /* Playback / Capture */
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct siu_port *port_info = siu_port_info(ss);
+ struct siu_stream *siu_stream;
+ u32 port = info->port_id;
+ struct siu_platform *pdata = siu_i2s_dai.dev->platform_data;
+ struct device *dev = ss->pcm->card->dev;
+ dma_cap_mask_t mask;
+ struct sh_dmae_slave *param;
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+
+ dev_dbg(dev, "%s, port=%d@%p\n", __func__, port, port_info);
+
+ if (ss->stream = SNDRV_PCM_STREAM_PLAYBACK) {
+ siu_stream = &port_info->playback;
+ param = &siu_stream->param;
+ param->slave_id = port ? SHDMA_SLAVE_SIUB_TX :
+ SHDMA_SLAVE_SIUA_TX;
+ } else {
+ siu_stream = &port_info->capture;
+ param = &siu_stream->param;
+ param->slave_id = port ? SHDMA_SLAVE_SIUB_RX :
+ SHDMA_SLAVE_SIUA_RX;
+ }
+
+ param->dma_dev = pdata->dma_dev;
+ /* Get DMA channel */
+ siu_stream->chan = dma_request_channel(mask, filter, param);
+ if (!siu_stream->chan) {
+ dev_err(dev, "DMA channel allocation failed!\n");
+ return -EBUSY;
+ }
+
+ siu_stream->substream = ss;
+
+ return 0;
+}
+
+static int siu_pcm_close(struct snd_pcm_substream *ss)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct device *dev = ss->pcm->card->dev;
+ struct siu_port *port_info = siu_port_info(ss);
+ struct siu_stream *siu_stream;
+
+ dev_dbg(dev, "%s: port=%d\n", __func__, info->port_id);
+
+ if (ss->stream = SNDRV_PCM_STREAM_PLAYBACK)
+ siu_stream = &port_info->playback;
+ else
+ siu_stream = &port_info->capture;
+
+ dma_release_channel(siu_stream->chan);
+ siu_stream->chan = NULL;
+
+ siu_stream->substream = NULL;
+
+ return 0;
+}
+
+static int siu_pcm_prepare(struct snd_pcm_substream *ss)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct siu_port *port_info = siu_port_info(ss);
+ struct device *dev = ss->pcm->card->dev;
+ struct snd_pcm_runtime *rt = ss->runtime;
+ struct siu_stream *siu_stream;
+ snd_pcm_sframes_t xfer_cnt;
+
+ if (ss->stream = SNDRV_PCM_STREAM_PLAYBACK)
+ siu_stream = &port_info->playback;
+ else
+ siu_stream = &port_info->capture;
+
+ rt = siu_stream->substream->runtime;
+
+ siu_stream->buf_bytes = snd_pcm_lib_buffer_bytes(ss);
+ siu_stream->period_bytes = snd_pcm_lib_period_bytes(ss);
+
+ dev_dbg(dev, "%s: port=%d, %d channels, period=%u bytes\n", __func__,
+ info->port_id, rt->channels, siu_stream->period_bytes);
+
+ /* We only support buffers that are multiples of the period */
+ if (siu_stream->buf_bytes % siu_stream->period_bytes) {
+ dev_err(dev, "%s() - buffer=%d not multiple of period=%d\n",
+ __func__, siu_stream->buf_bytes,
+ siu_stream->period_bytes);
+ return -EINVAL;
+ }
+
+ xfer_cnt = bytes_to_frames(rt, siu_stream->period_bytes);
+ if (!xfer_cnt || xfer_cnt > 0x1000000)
+ return -EINVAL;
+
+ siu_stream->format = rt->format;
+ siu_stream->xfer_cnt = xfer_cnt;
+
+ dev_dbg(dev, "port=%d buf=%lx buf_bytes=%d period_bytes=%d "
+ "format=%d channels=%d xfer_cnt=%d\n", info->port_id,
+ (unsigned long)rt->dma_addr, siu_stream->buf_bytes,
+ siu_stream->period_bytes,
+ siu_stream->format, rt->channels, (int)xfer_cnt);
+
+ return 0;
+}
+
+static int siu_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
+{
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct device *dev = ss->pcm->card->dev;
+ struct siu_port *port_info = siu_port_info(ss);
+ int ret;
+
+ dev_dbg(dev, "%s: port=%d@%p, cmd=%d\n", __func__,
+ info->port_id, port_info, cmd);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ if (ss->stream = SNDRV_PCM_STREAM_PLAYBACK)
+ ret = siu_pcm_stmwrite_start(port_info);
+ else
+ ret = siu_pcm_stmread_start(port_info);
+
+ if (ret < 0)
+ dev_warn(dev, "%s: start failed on port=%d\n",
+ __func__, info->port_id);
+
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ if (ss->stream = SNDRV_PCM_STREAM_PLAYBACK)
+ siu_pcm_stmwrite_stop(port_info);
+ else
+ siu_pcm_stmread_stop(port_info);
+ ret = 0;
+
+ break;
+ default:
+ dev_err(dev, "%s() unsupported cmd=%d\n", __func__, cmd);
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+/*
+ * So far only resolution of one period is supported, subject to extending the
+ * dmangine API
+ */
+static snd_pcm_uframes_t siu_pcm_pointer_dma(struct snd_pcm_substream *ss)
+{
+ struct device *dev = ss->pcm->card->dev;
+ struct siu_info *info = siu_i2s_dai.private_data;
+ u32 __iomem *base = info->reg;
+ struct siu_port *port_info = siu_port_info(ss);
+ struct snd_pcm_runtime *rt = ss->runtime;
+ size_t ptr;
+ struct siu_stream *siu_stream;
+
+ if (ss->stream = SNDRV_PCM_STREAM_PLAYBACK)
+ siu_stream = &port_info->playback;
+ else
+ siu_stream = &port_info->capture;
+
+ /*
+ * ptr is the offset into the buffer where the dma is currently at. We
+ * check if the dma buffer has just wrapped.
+ */
+ ptr = PERIOD_OFFSET(rt->dma_addr,
+ siu_stream->cur_period,
+ siu_stream->period_bytes) - rt->dma_addr;
+
+ dev_dbg(dev,
+ "%s: port=%d, events %x, FSTS %x, xferred %u/%u, cookie %d\n",
+ __func__, info->port_id, siu_read32(base + SIU_EVNTC),
+ siu_read32(base + SIU_SBFSTS), ptr, siu_stream->buf_bytes,
+ siu_stream->cookie);
+
+ if (ptr >= siu_stream->buf_bytes)
+ ptr = 0;
+
+ return bytes_to_frames(ss->runtime, ptr);
+}
+
+static int siu_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
+ struct snd_pcm *pcm)
+{
+ /* card->dev = socdev->dev, see snd_soc_new_pcms() */
+ struct siu_info *info = siu_i2s_dai.private_data;
+ struct platform_device *pdev = to_platform_device(card->dev);
+ int ret;
+ int i;
+
+ /* pdev->id selects between SIUA and SIUB */
+ if (pdev->id < 0 || pdev->id >= SIU_PORT_NUM)
+ return -EINVAL;
+
+ info->port_id = pdev->id;
+
+ /*
+ * While the siu has 2 ports, only one port can be on at a time (only 1
+ * SPB). So far all the boards using the siu had only one of the ports
+ * wired to a codec. To simplify things, we only register one port with
+ * alsa. In case both ports are needed, it should be changed here
+ */
+ for (i = pdev->id; i < pdev->id + 1; i++) {
+ struct siu_port **port_info = &siu_ports[i];
+
+ ret = siu_init_port(i, port_info, card);
+ if (ret < 0)
+ return ret;
+
+ ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
+ SNDRV_DMA_TYPE_DEV, NULL,
+ SIU_BUFFER_BYTES_MAX, SIU_BUFFER_BYTES_MAX);
+ if (ret < 0) {
+ dev_err(card->dev,
+ "snd_pcm_lib_preallocate_pages_for_all() err=%d",
+ ret);
+ goto fail;
+ }
+
+ (*port_info)->pcm = pcm;
+
+ /* IO tasklets */
+ tasklet_init(&(*port_info)->playback.tasklet, siu_io_tasklet,
+ (unsigned long)&(*port_info)->playback);
+ tasklet_init(&(*port_info)->capture.tasklet, siu_io_tasklet,
+ (unsigned long)&(*port_info)->capture);
+ }
+
+ dev_info(card->dev, "SuperH SIU driver initialized.\n");
+ return 0;
+
+fail:
+ siu_free_port(siu_ports[pdev->id]);
+ dev_err(card->dev, "SIU: failed to initialize.\n");
+ return ret;
+}
+
+static void siu_pcm_free(struct snd_pcm *pcm)
+{
+ struct platform_device *pdev = to_platform_device(pcm->card->dev);
+ struct siu_port *port_info = siu_ports[pdev->id];
+
+ tasklet_kill(&port_info->capture.tasklet);
+ tasklet_kill(&port_info->playback.tasklet);
+
+ siu_free_port(port_info);
+ snd_pcm_lib_preallocate_free_for_all(pcm);
+
+ dev_dbg(pcm->card->dev, "%s\n", __func__);
+}
+
+static struct snd_pcm_ops siu_pcm_ops = {
+ .open = siu_pcm_open,
+ .close = siu_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = siu_pcm_hw_params,
+ .hw_free = siu_pcm_hw_free,
+ .prepare = siu_pcm_prepare,
+ .trigger = siu_pcm_trigger,
+ .pointer = siu_pcm_pointer_dma,
+};
+
+struct snd_soc_platform siu_platform = {
+ .name = "siu-audio",
+ .pcm_ops = &siu_pcm_ops,
+ .pcm_new = siu_pcm_new,
+ .pcm_free = siu_pcm_free,
+};
+EXPORT_SYMBOL_GPL(siu_platform);