This driver is very simple. It support playback only now. It is tested by ms7724se board.
Signed-off-by: Kuninori Morimoto morimoto.kuninori@renesas.com --- include/sound/fsi.h | 83 ++++ sound/soc/sh/Kconfig | 5 + sound/soc/sh/Makefile | 1 + sound/soc/sh/fsi.c | 1001 +++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 1090 insertions(+), 0 deletions(-) create mode 100644 include/sound/fsi.h create mode 100644 sound/soc/sh/fsi.c
diff --git a/include/sound/fsi.h b/include/sound/fsi.h new file mode 100644 index 0000000..c022736 --- /dev/null +++ b/include/sound/fsi.h @@ -0,0 +1,83 @@ +#ifndef __SOUND_FSI_H +#define __SOUND_FSI_H + +/* + * Fifo-attached Serial Interface (FSI) support for SH7724 + * + * Copyright (C) 2009 Renesas Solutions Corp. + * Kuninori Morimoto morimoto.kuninori@renesas.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. + */ + +/* flags format + + * 0xABCDEEFF + * + * A: channel size for TDM (input) + * B: channel size for TDM (ooutput) + * C: inversion + * D: mode + * E: input format + * F: output format + */ + +#include <linux/clk.h> +#include <sound/soc.h> + +/* TDM channel */ +#define SH_FSI_SET_CH_I(x) ((x & 0xF) << 28) +#define SH_FSI_SET_CH_O(x) ((x & 0xF) << 24) + +#define SH_FSI_CH_IMASK 0xF0000000 +#define SH_FSI_CH_OMASK 0x0F000000 +#define SH_FSI_GET_CH_I(x) ((x & SH_FSI_CH_IMASK) >> 28) +#define SH_FSI_GET_CH_O(x) ((x & SH_FSI_CH_OMASK) >> 24) + +/* clock inversion */ +#define SH_FSI_INVERSION_MASK 0x00F00000 +#define SH_FSI_LRM_INV (1 << 20) +#define SH_FSI_BRM_INV (1 << 21) +#define SH_FSI_LRS_INV (1 << 22) +#define SH_FSI_BRS_INV (1 << 23) + +/* mode */ +#define SH_FSI_MODE_MASK 0x000F0000 +#define SH_FSI_IN_SLAVE_MODE (1 << 16) /* default master mode */ +#define SH_FSI_OUT_SLAVE_MODE (1 << 17) /* default master mode */ + +/* DI format */ +#define SH_FSI_FMT_MASK 0x000000FF +#define SH_FSI_IFMT(x) (((SH_FSI_FMT_ ## x) & SH_FSI_FMT_MASK) << 8) +#define SH_FSI_OFMT(x) (((SH_FSI_FMT_ ## x) & SH_FSI_FMT_MASK) << 0) +#define SH_FSI_GET_IFMT(x) ((x >> 8) & SH_FSI_FMT_MASK) +#define SH_FSI_GET_OFMT(x) ((x >> 0) & SH_FSI_FMT_MASK) + +#define SH_FSI_FMT_MONO (1 << 0) +#define SH_FSI_FMT_MONO_DELAY (1 << 1) +#define SH_FSI_FMT_PCM (1 << 2) +#define SH_FSI_FMT_I2S (1 << 3) +#define SH_FSI_FMT_TDM (1 << 4) +#define SH_FSI_FMT_TDM_DELAY (1 << 5) + +#define SH_FSI_IFMT_TDM_CH(x) \ + (SH_FSI_IFMT(TDM) | SH_FSI_SET_CH_I(x)) +#define SH_FSI_IFMT_TDM_DELAY_CH(x) \ + (SH_FSI_IFMT(TDM_DELAY) | SH_FSI_SET_CH_I(x)) + +#define SH_FSI_OFMT_TDM_CH(x) \ + (SH_FSI_OFMT(TDM) | SH_FSI_SET_CH_O(x)) +#define SH_FSI_OFMT_TDM_DELAY_CH(x) \ + (SH_FSI_OFMT(TDM_DELAY) | SH_FSI_SET_CH_O(x)) + +struct sh_fsi_platform_info { + unsigned long porta_flags; + unsigned long portb_flags; +}; + +extern struct snd_soc_dai fsi_soc_dai[2]; +extern struct snd_soc_platform fsi_soc_platform; + +#endif /* __SOUND_FSI_H */ diff --git a/sound/soc/sh/Kconfig b/sound/soc/sh/Kconfig index 54bd604..afb0e60 100644 --- a/sound/soc/sh/Kconfig +++ b/sound/soc/sh/Kconfig @@ -20,6 +20,11 @@ config SND_SOC_SH4_HAC config SND_SOC_SH4_SSI tristate
+config SND_SOC_SH4_FSI + tristate "SH4 FSI support" + depends on CPU_SUBTYPE_SH7724 + help + This option enables FSI sound support
## diff --git a/sound/soc/sh/Makefile b/sound/soc/sh/Makefile index a8e8ab8..dfa4949 100644 --- a/sound/soc/sh/Makefile +++ b/sound/soc/sh/Makefile @@ -7,6 +7,7 @@ snd-soc-hac-objs := hac.o snd-soc-ssi-objs := ssi.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) += fsi.o
## boards snd-soc-sh7760-ac97-objs := sh7760-ac97.o diff --git a/sound/soc/sh/fsi.c b/sound/soc/sh/fsi.c new file mode 100644 index 0000000..017f170 --- /dev/null +++ b/sound/soc/sh/fsi.c @@ -0,0 +1,1001 @@ +/* + * Fifo-attached Serial Interface (FSI) support for SH7724 + * + * Copyright (C) 2009 Renesas Solutions Corp. + * Kuninori Morimoto morimoto.kuninori@renesas.com + * + * Based on ssi.c + * Copyright (c) 2007 Manuel Lauss mano@roarinelk.homelinux.net + * + * 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/init.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/delay.h> +#include <linux/list.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/initval.h> +#include <sound/soc.h> +#include <sound/pcm_params.h> +#include <sound/fsi.h> +#include <asm/atomic.h> +#include <asm/dma.h> +#include <asm/dma-sh.h> + +#define DO_FMT 0x0000 +#define DOFF_CTL 0x0004 +#define DOFF_ST 0x0008 +#define DI_FMT 0x000C +#define DIFF_CTL 0x0010 +#define DIFF_ST 0x0014 +#define CKG1 0x0018 +#define CKG2 0x001C +#define DIDT 0x0020 +#define DODT 0x0024 +#define MUTE_ST 0x0028 +#define REG_END MUTE_ST + +#define INT_ST 0x0200 +#define IEMSK 0x0204 +#define IMSK 0x0208 +#define MUTE 0x020C +#define CLK_RST 0x0210 +#define SOFT_RST 0x0214 +#define MREG_START INT_ST +#define MREG_END SOFT_RST + +/* DO_FMT */ +/* DI_FMT */ +#define CR_FMT(param) ((param) << 4) +# define CR_MONO 0x0 +# define CR_MONO_D 0x1 +# define CR_PCM 0x2 +# define CR_I2S 0x3 +# define CR_TDM 0x4 +# define CR_TDM_D 0x5 + +/* DOFF_CTL */ +/* DIFF_CTL */ +#define IRQ_HALF 0x00100000 +#define FIFO_CLR 0x00000001 + +/* DOFF_ST */ +#define ERR_OVER 0x00000010 +#define ERR_UNDER 0x00000001 + +/* CLK_RST */ +#define B_CLK 0x00000010 +#define A_CLK 0x00000001 + +/* INT_ST */ +#define INT_B_IN (1 << 12) +#define INT_B_OUT (1 << 8) +#define INT_A_IN (1 << 4) +#define INT_A_OUT (1 << 0) + +#define FSI_RATES SNDRV_PCM_RATE_8000_96000 + +#define FSI_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE) + +/************************************************************************ + + + struct + + +************************************************************************/ +struct fsi_priv { + void __iomem *base; + struct snd_pcm_substream *substream; + + int fifo_max; + int chan; + int dma_chan; + + int byte_offset; + int period_len; + int buffer_len; + int periods; +}; + +struct fsi_master { + void __iomem *base; + atomic_t user; + int irq; + struct clk *clk; + struct fsi_priv fsia; + struct fsi_priv fsib; + struct sh_fsi_platform_info *info; +}; + +struct fsi_master *master; + +/************************************************************************ + + + basic read write function + + +************************************************************************/ +static int __fsi_reg_write(u32 reg, u32 data) +{ + /* valid data area is 24bit */ + data &= 0x00ffffff; + + return ctrl_outl(data, reg); +} + +static u32 __fsi_reg_read(u32 reg) +{ + return ctrl_inl(reg); +} + +static int __fsi_reg_mask_set(u32 reg, u32 mask, u32 data) +{ + u32 val = __fsi_reg_read(reg); + + val &= ~mask; + val |= data & mask; + + return __fsi_reg_write(reg, val); +} + +static int fsi_reg_write(struct fsi_priv *fsi, u32 reg, u32 data) +{ + if (reg > REG_END) + return -1; + + return __fsi_reg_write((u32)(fsi->base + reg), data); +} + +static u32 fsi_reg_read(struct fsi_priv *fsi, u32 reg) +{ + if (reg > REG_END) + return 0; + + return __fsi_reg_read((u32)(fsi->base + reg)); +} + +static int fsi_reg_mask_set(struct fsi_priv *fsi, u32 reg, u32 mask, u32 data) +{ + if (reg > REG_END) + return -1; + + return __fsi_reg_mask_set((u32)(fsi->base + reg), mask, data); +} + +static int fsi_master_write(u32 reg, u32 data) +{ + if ((reg < MREG_START) || + (reg > MREG_END)) + return -1; + + return __fsi_reg_write((u32)(master->base + reg), data); +} + +static u32 fsi_master_read(u32 reg) +{ + if ((reg < MREG_START) || + (reg > MREG_END)) + return 0; + + return __fsi_reg_read((u32)(master->base + reg)); +} + +static int fsi_master_mask_set(u32 reg, u32 mask, u32 data) +{ + if ((reg < MREG_START) || + (reg > MREG_END)) + return -1; + + return __fsi_reg_mask_set((u32)(master->base + reg), mask, data); +} + +/************************************************************************ + + + basic function + + +************************************************************************/ +static struct fsi_priv *fsi_get(struct snd_pcm_substream *substream) +{ + struct snd_soc_pcm_runtime *rtd; + struct fsi_priv *fsi = NULL; + + if (!substream || !master) + return NULL; + + rtd = substream->private_data; + switch (rtd->dai->cpu_dai->id) { + case 0: + fsi = &master->fsia; + break; + case 1: + fsi = &master->fsib; + break; + } + + return fsi; +} + +static int fsi_is_port_a(struct fsi_priv *fsi) +{ + /* return + * 1 : port a + * 0 : port b + */ + + if (fsi == &master->fsia) + return 1; + + return 0; +} + +static u32 fsi_get_info_flags(struct fsi_priv *fsi) +{ + int is_porta = fsi_is_port_a(fsi); + + return is_porta ? master->info->porta_flags : + master->info->portb_flags; +} + +static int fsi_is_master_mode(struct fsi_priv *fsi, int is_play) +{ + u32 mode; + u32 flags = fsi_get_info_flags(fsi); + + mode = is_play ? SH_FSI_OUT_SLAVE_MODE : SH_FSI_IN_SLAVE_MODE; + + /* return + * 1 : master mode + * 0 : slave mode + */ + + return (mode & flags) != mode; +} + +static u32 fsi_port_ab_io_bit(struct fsi_priv *fsi, int is_play) +{ + int is_porta = fsi_is_port_a(fsi); + u32 data; + + if (is_porta) + data = is_play ? (1 << 0) : (1 << 4); + else + data = is_play ? (1 << 8) : (1 << 12); + + return data; +} + +static void fsi_stream_push(struct fsi_priv *fsi, + struct snd_pcm_substream *substream, + u32 buffer_len, + u32 period_len) +{ + fsi->substream = substream; + fsi->buffer_len = buffer_len; + fsi->period_len = period_len; + fsi->byte_offset = 0; + fsi->periods = 0; +} + +static void fsi_stream_pop(struct fsi_priv *fsi) +{ + fsi->substream = NULL; + fsi->buffer_len = 0; + fsi->period_len = 0; + fsi->byte_offset = 0; + fsi->periods = 0; +} + +static int fsi_get_fifo_residue(struct fsi_priv *fsi, int is_play) +{ + u32 status; + u32 reg = is_play ? DOFF_ST : DIFF_ST; + int residue; + + status = fsi_reg_read(fsi, reg); + residue = 0x1ff & (status >> 8); + residue *= fsi->chan; + + return residue; +} + +static int fsi_get_residue(struct fsi_priv *fsi, int is_play) +{ + int residue; + int width; + struct snd_pcm_runtime *runtime; + + runtime = fsi->substream->runtime; + + /* get 1 channel data width */ + width = frames_to_bytes(runtime, 1) / fsi->chan; + + if (2 == width) + residue = fsi_get_fifo_residue(fsi, is_play); + else + residue = get_dma_residue(fsi->dma_chan); + + return residue; +} + +/************************************************************************ + + + basic dma function + + +************************************************************************/ +#define PORTA_DMA 0 +#define PORTB_DMA 1 + +static int fsi_get_dma_chan(void) +{ + if (0 != request_dma(PORTA_DMA, "fsia")) + return -EIO; + + if (0 != request_dma(PORTB_DMA, "fsib")) { + free_dma(PORTA_DMA); + return -EIO; + } + + master->fsia.dma_chan = PORTA_DMA; + master->fsib.dma_chan = PORTB_DMA; + + return 0; +} + +static void fsi_free_dma_chan(void) +{ + dma_wait_for_completion(PORTA_DMA); + dma_wait_for_completion(PORTB_DMA); + free_dma(PORTA_DMA); + free_dma(PORTB_DMA); + + master->fsia.dma_chan = -1; + master->fsib.dma_chan = -1; +} + +/************************************************************************ + + + ctrl function + + +************************************************************************/ +static void fsi_irq_enable(struct fsi_priv *fsi, int is_play) +{ + u32 data = fsi_port_ab_io_bit(fsi, is_play); + + fsi_master_mask_set(IMSK, data, data); + fsi_master_mask_set(IEMSK, data, data); +} + +static void fsi_irq_disable(struct fsi_priv *fsi, int is_play) +{ + u32 data = fsi_port_ab_io_bit(fsi, is_play); + + fsi_master_mask_set(IMSK, data, 0); + fsi_master_mask_set(IEMSK, data, 0); +} + +static void fsi_clk_ctrl(struct fsi_priv *fsi, int enable) +{ + u32 val = fsi_is_port_a(fsi) ? (1 << 0) : (1 << 4); + + if (enable) + fsi_master_mask_set(CLK_RST, val, val); + else + fsi_master_mask_set(CLK_RST, val, 0); +} + +static void fsi_irq_init(struct fsi_priv *fsi, int is_play) +{ + u32 data; + u32 ctrl; + + data = fsi_port_ab_io_bit(fsi, is_play); + ctrl = is_play ? DOFF_CTL : DIFF_CTL; + + /* set IMSK */ + fsi_irq_disable(fsi, is_play); + + /* set interrupt generation factor */ + fsi_reg_write(fsi, ctrl, IRQ_HALF); + + /* clear FIFO */ + fsi_reg_mask_set(fsi, ctrl, FIFO_CLR, FIFO_CLR); + + /* clear interrupt factor */ + fsi_master_mask_set(INT_ST, data, 0); +} + +static void fsi_soft_all_reset(void) +{ + u32 status = fsi_master_read(SOFT_RST); + + /* port AB reset */ + status &= 0x000000ff; + fsi_master_write(SOFT_RST, status); + mdelay(10); + + /* soft reset */ + status &= 0x000000f0; + fsi_master_write(SOFT_RST, status); + status |= 0x00000001; + fsi_master_write(SOFT_RST, status); + mdelay(10); +} + +static void fsi_16data_push(struct fsi_priv *fsi, + struct snd_pcm_runtime *runtime, + int send) +{ + u16 *dma_start; + u32 snd; + int i; + + /* get dma start position for FSI */ + dma_start = (u16 *)runtime->dma_area; + dma_start += fsi->byte_offset / 2; + + /* + * soft dma + * FSI can not use DMA when 16bpp + */ + for (i = 0; i < send; i++) { + snd = (u32)dma_start[i]; + fsi_reg_write(fsi, DODT, snd << 8); + } +} + +static void fsi_32data_push(struct fsi_priv *fsi, + struct snd_pcm_runtime *runtime, + int send) +{ + u32 *dma_start; + + /* get dma start position for FSI */ + dma_start = (u32 *)runtime->dma_area; + dma_start += fsi->byte_offset / 4; + + dma_wait_for_completion(fsi->dma_chan); + dma_configure_channel(fsi->dma_chan, (SM_INC|0x400|TS_32|TM_BUR)); + dma_write(fsi->dma_chan, (u32)dma_start, + (u32)(fsi->base + DODT), send * 4); +} + +/* playback interrupt */ +static int fsi_data_push(struct fsi_priv *fsi) +{ + struct snd_pcm_runtime *runtime; + struct snd_pcm_substream *substream = NULL; + int send; + int fifo_free; + int width; + + if (!fsi || + !fsi->substream || + !fsi->substream->runtime) + return -EINVAL; + + runtime = fsi->substream->runtime; + + /* FSI FIFO has limit. + * So, this driver can not send periods data at a time + */ + if (fsi->byte_offset >= + fsi->period_len * (fsi->periods + 1)) { + + substream = fsi->substream; + fsi->periods = (fsi->periods + 1) % runtime->periods; + + if (0 == fsi->periods) + fsi->byte_offset = 0; + } + + /* get 1 channel data width */ + width = frames_to_bytes(runtime, 1) / fsi->chan; + + /* get send size for alsa */ + send = (fsi->buffer_len - fsi->byte_offset) / width; + + /* get FIFO free size */ + fifo_free = (fsi->fifo_max * fsi->chan) - fsi_get_fifo_residue(fsi, 1); + + /* size check */ + if (fifo_free < send) + send = fifo_free; + + if (2 == width) + fsi_16data_push(fsi, runtime, send); + else if (4 == width) + fsi_32data_push(fsi, runtime, send); + else + return -EINVAL; + + fsi->byte_offset += send * width; + + fsi_irq_enable(fsi, 1); + + if (substream) + snd_pcm_period_elapsed(substream); + + return 0; +} + +static irqreturn_t fsi_interrupt(int irq, void *data) +{ + u32 status = fsi_master_read(SOFT_RST) & ~0x00000010; + u32 int_st = fsi_master_read(INT_ST); + + /* clear irq status */ + fsi_master_write(SOFT_RST, status); + fsi_master_write(SOFT_RST, status | 0x00000010); + + if (int_st & INT_A_OUT) + fsi_data_push(&master->fsia); + if (int_st & INT_B_OUT) + fsi_data_push(&master->fsib); + + fsi_master_write(INT_ST, 0x0000000); + + return IRQ_HANDLED; +} + +/************************************************************************ + + + dai ops + + +************************************************************************/ +static int fsi_dai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct fsi_priv *fsi = fsi_get(substream); + const char *msg; + u32 flags = fsi_get_info_flags(fsi); + u32 fmt; + u32 reg; + u32 data; + int is_play = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); + int is_master; + int ret = 0; + + if (1 == atomic_inc_return(&master->user)) + clk_enable(master->clk); + + /* CKG1 */ + data = is_play ? (1 << 0) : (1 << 4); + is_master = fsi_is_master_mode(fsi, is_play); + if (is_master) + fsi_reg_mask_set(fsi, CKG1, data, data); + else + fsi_reg_mask_set(fsi, CKG1, data, 0); + + /* clock inversion (CKG2) */ + data = 0; + switch (SH_FSI_INVERSION_MASK & flags) { + case SH_FSI_LRM_INV: + data = 1 << 12; + break; + case SH_FSI_BRM_INV: + data = 1 << 8; + break; + case SH_FSI_LRS_INV: + data = 1 << 4; + break; + case SH_FSI_BRS_INV: + data = 1 << 0; + break; + } + fsi_reg_write(fsi, CKG2, data); + + /* do fmt, di fmt */ + data = 0; + reg = is_play ? DO_FMT : DI_FMT; + fmt = is_play ? SH_FSI_GET_OFMT(flags) : SH_FSI_GET_IFMT(flags); + switch (fmt) { + case SH_FSI_FMT_MONO: + msg = "MONO"; + data = CR_FMT(CR_MONO); + fsi->chan = 1; + break; + case SH_FSI_FMT_MONO_DELAY: + msg = "MONO Delay"; + data = CR_FMT(CR_MONO_D); + fsi->chan = 1; + break; + case SH_FSI_FMT_PCM: + msg = "PCM"; + data = CR_FMT(CR_PCM); + fsi->chan = 2; + break; + case SH_FSI_FMT_I2S: + msg = "I2S"; + data = CR_FMT(CR_I2S); + fsi->chan = 2; + break; + case SH_FSI_FMT_TDM: + msg = "TDM"; + data = CR_FMT(CR_TDM) | (fsi->chan - 1); + fsi->chan = is_play ? + SH_FSI_GET_CH_O(flags) : SH_FSI_GET_CH_I(flags); + break; + case SH_FSI_FMT_TDM_DELAY: + msg = "TDM Delay"; + data = CR_FMT(CR_TDM_D) | (fsi->chan - 1); + fsi->chan = is_play ? + SH_FSI_GET_CH_O(flags) : SH_FSI_GET_CH_I(flags); + break; + default: + dev_err(dai->dev, "unknown format.\n"); + return -EINVAL; + } + + switch (fsi->chan) { + case 1: + fsi->fifo_max = 256; + break; + case 2: + fsi->fifo_max = 128; + break; + case 3: + case 4: + fsi->fifo_max = 64; + break; + case 5: + case 6: + case 7: + case 8: + fsi->fifo_max = 32; + break; + default: + dev_err(dai->dev, "channel size error.\n"); + return -EINVAL; + } + + fsi_reg_write(fsi, reg, data); + dev_info(dai->dev, "use %s format (%d channel) use %d DMAC\n", + msg, fsi->chan, fsi->dma_chan); + + /* + * clear clk reset if master mode + */ + if (is_master) + fsi_clk_ctrl(fsi, 1); + + /* irq setting */ + fsi_irq_init(fsi, is_play); + + return ret; +} + +static void fsi_dai_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct fsi_priv *fsi = fsi_get(substream); + int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + + fsi_irq_disable(fsi, is_play); + fsi_clk_ctrl(fsi, 0); + + if (atomic_dec_and_test(&master->user)) + clk_disable(master->clk); +} + +static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + struct fsi_priv *fsi = fsi_get(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + int ret = 0; + + /* capture not supported */ + if (!is_play) + return -ENODEV; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + fsi_stream_push(fsi, substream, + frames_to_bytes(runtime, runtime->buffer_size), + frames_to_bytes(runtime, runtime->period_size)); + ret = fsi_data_push(fsi); + break; + case SNDRV_PCM_TRIGGER_STOP: + fsi_irq_disable(fsi, is_play); + fsi_stream_pop(fsi); + break; + } + + return ret; +} + +static struct snd_soc_dai_ops fsi_dai_ops = { + .startup = fsi_dai_startup, + .shutdown = fsi_dai_shutdown, + .trigger = fsi_dai_trigger, +}; + +/************************************************************************ + + + pcm ops + + +************************************************************************/ +static struct snd_pcm_hardware fsi_pcm_hardware = { + .info = SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_PAUSE, + .formats = FSI_FMTS, + .rates = FSI_RATES, + .rate_min = 8000, + .rate_max = 192000, + .channels_min = 1, + .channels_max = 2, + .buffer_bytes_max = 64 * 1024, + .period_bytes_min = 32, + .period_bytes_max = 8192, + .periods_min = 1, + .periods_max = 32, + .fifo_size = 256, +}; + +static int fsi_pcm_open(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + int ret = 0; + + snd_soc_set_runtime_hwparams(substream, &fsi_pcm_hardware); + + ret = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + + return ret; +} + +static int fsi_pcm_close(struct snd_pcm_substream *substream) +{ + return 0; +} + +static int fsi_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + return snd_pcm_lib_malloc_pages(substream, + params_buffer_bytes(hw_params)); +} + +static int fsi_hw_free(struct snd_pcm_substream *substream) +{ + return snd_pcm_lib_free_pages(substream); +} + +static snd_pcm_uframes_t fsi_pointer(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct fsi_priv *fsi = fsi_get(substream); + int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + long location; + + location = (fsi->byte_offset - 1) - fsi_get_residue(fsi, is_play); + if (location < 0) + location = 0; + + return bytes_to_frames(runtime, location); +} + +static struct snd_pcm_ops fsi_pcm_ops = { + .open = fsi_pcm_open, + .close = fsi_pcm_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = fsi_hw_params, + .hw_free = fsi_hw_free, + .pointer = fsi_pointer, +}; + +/************************************************************************ + + + snd_soc_platform + + +************************************************************************/ +#define PREALLOC_BUFFER (32 * 1024) +#define PREALLOC_BUFFER_MAX (32 * 1024) + +static void fsi_pcm_free(struct snd_pcm *pcm) +{ + snd_pcm_lib_preallocate_free_for_all(pcm); +} + +static int fsi_pcm_new(struct snd_card *card, + struct snd_soc_dai *dai, + struct snd_pcm *pcm) +{ + /* + * dont use SNDRV_DMA_TYPE_DEV, since it will oops the SH kernel + * in MMAP mode (i.e. aplay -M) + */ + return snd_pcm_lib_preallocate_pages_for_all( + pcm, + SNDRV_DMA_TYPE_CONTINUOUS, + snd_dma_continuous_data(GFP_KERNEL), + PREALLOC_BUFFER, PREALLOC_BUFFER_MAX); +} + +/************************************************************************ + + + alsa struct + + +************************************************************************/ +struct snd_soc_dai fsi_soc_dai[] = { + { + .name = "FSI0", + .id = 0, + .playback = { + .rates = FSI_RATES, + .formats = FSI_FMTS, + .channels_min = 1, + .channels_max = 8, + }, + /* capture not supported */ + .ops = &fsi_dai_ops, + } +}; +EXPORT_SYMBOL_GPL(fsi_soc_dai); + +struct snd_soc_platform fsi_soc_platform = { + .name = "fsi-pcm", + .pcm_ops = &fsi_pcm_ops, + .pcm_new = fsi_pcm_new, + .pcm_free = fsi_pcm_free, +}; +EXPORT_SYMBOL_GPL(fsi_soc_platform); + +/************************************************************************ + + + platform function + + +************************************************************************/ +static int fsi_probe(struct platform_device *pdev) +{ + struct resource *res; + char clk_name[8]; + unsigned int irq; + int ret; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + irq = platform_get_irq(pdev, 0); + if (!res || !irq) { + dev_err(&pdev->dev, "Not enough FSI platform resources.\n"); + ret = -ENODEV; + goto exit; + } + + master = kzalloc(sizeof(*master), GFP_KERNEL); + if (!master) { + dev_err(&pdev->dev, "Could not allocate master\n"); + ret = -ENOMEM; + goto exit; + } + + master->base = ioremap_nocache(res->start, resource_size(res)); + if (!master->base) { + ret = -ENXIO; + dev_err(&pdev->dev, "Unable to ioremap FSI registers.\n"); + goto exit_kfree; + } + + master->irq = irq; + master->info = pdev->dev.platform_data; + master->fsia.base = master->base; + master->fsib.base = master->base + 0x40; + + master->fsia.dma_chan = -1; + master->fsib.dma_chan = -1; + + ret = fsi_get_dma_chan(); + if (ret < 0) + goto exit_iounmap; + + /* FSI is based on SPU mstp */ + snprintf(clk_name, sizeof(clk_name), "spu%d", pdev->id); + master->clk = clk_get(&pdev->dev, clk_name); + if (IS_ERR(master->clk)) { + dev_err(&pdev->dev, "cannot get %s mstp\n", clk_name); + ret = -EIO; + goto exit_free_dma; + } + + /* FSIA */ + fsi_soc_dai[0].dev = &pdev->dev; + + master->user = ATOMIC_INIT(0); + + fsi_soft_all_reset(); + + ret = request_irq(irq, &fsi_interrupt, IRQF_DISABLED, "fsi", master); + if (ret) { + dev_err(&pdev->dev, "irq request err\n"); + goto exit_free_dma; + } + + ret = snd_soc_register_platform(&fsi_soc_platform); + if (ret < 0) { + dev_err(&pdev->dev, "cannot snd soc register\n"); + goto exit_free_irq; + } + + return snd_soc_register_dais(fsi_soc_dai, ARRAY_SIZE(fsi_soc_dai)); + +exit_free_irq: + free_irq(irq, master); +exit_free_dma: + fsi_free_dma_chan(); +exit_iounmap: + iounmap(master->base); +exit_kfree: + kfree(master); + master = NULL; +exit: + return ret; +} + +static int fsi_remove(struct platform_device *pdev) +{ + snd_soc_unregister_dais(fsi_soc_dai, ARRAY_SIZE(fsi_soc_dai)); + snd_soc_unregister_platform(&fsi_soc_platform); + + clk_put(master->clk); + + fsi_free_dma_chan(); + + free_irq(master->irq, master); + + iounmap(master->base); + kfree(master); + master = NULL; + return 0; +} + +static struct platform_driver fsi_driver = { + .driver = { + .name = "sh_fsi", + }, + .probe = fsi_probe, + .remove = fsi_remove, +}; + +static int __init fsi_mobile_init(void) +{ + return platform_driver_register(&fsi_driver); +} + +static void __exit fsi_mobile_exit(void) +{ + platform_driver_unregister(&fsi_driver); +} +module_init(fsi_mobile_init); +module_exit(fsi_mobile_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("SuperH onchip FSI audio driver"); +MODULE_AUTHOR("Kuninori Morimoto morimoto.kuninori@renesas.com");