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linux-sg2042/sound/soc/sh/fsi.c

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/*
* 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/delay.h>
#include <linux/pm_runtime.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <sound/soc.h>
#include <sound/sh_fsi.h>
/* PortA/PortB register */
#define REG_DO_FMT 0x0000
#define REG_DOFF_CTL 0x0004
#define REG_DOFF_ST 0x0008
#define REG_DI_FMT 0x000C
#define REG_DIFF_CTL 0x0010
#define REG_DIFF_ST 0x0014
#define REG_CKG1 0x0018
#define REG_CKG2 0x001C
#define REG_DIDT 0x0020
#define REG_DODT 0x0024
#define REG_MUTE_ST 0x0028
#define REG_OUT_DMAC 0x002C
#define REG_OUT_SEL 0x0030
#define REG_IN_DMAC 0x0038
/* master register */
#define MST_CLK_RST 0x0210
#define MST_SOFT_RST 0x0214
#define MST_FIFO_SZ 0x0218
/* core register (depend on FSI version) */
#define A_MST_CTLR 0x0180
#define B_MST_CTLR 0x01A0
#define CPU_INT_ST 0x01F4
#define CPU_IEMSK 0x01F8
#define CPU_IMSK 0x01FC
#define INT_ST 0x0200
#define IEMSK 0x0204
#define IMSK 0x0208
/* DO_FMT */
/* DI_FMT */
#define CR_BWS_24 (0x0 << 20) /* FSI2 */
#define CR_BWS_16 (0x1 << 20) /* FSI2 */
#define CR_BWS_20 (0x2 << 20) /* FSI2 */
#define CR_DTMD_PCM (0x0 << 8) /* FSI2 */
#define CR_DTMD_SPDIF_PCM (0x1 << 8) /* FSI2 */
#define CR_DTMD_SPDIF_STREAM (0x2 << 8) /* FSI2 */
#define CR_MONO (0x0 << 4)
#define CR_MONO_D (0x1 << 4)
#define CR_PCM (0x2 << 4)
#define CR_I2S (0x3 << 4)
#define CR_TDM (0x4 << 4)
#define CR_TDM_D (0x5 << 4)
/* DOFF_CTL */
/* DIFF_CTL */
#define IRQ_HALF 0x00100000
#define FIFO_CLR 0x00000001
/* DOFF_ST */
#define ERR_OVER 0x00000010
#define ERR_UNDER 0x00000001
#define ST_ERR (ERR_OVER | ERR_UNDER)
/* CKG1 */
#define ACKMD_MASK 0x00007000
#define BPFMD_MASK 0x00000700
#define DIMD (1 << 4)
#define DOMD (1 << 0)
/* A/B MST_CTLR */
#define BP (1 << 4) /* Fix the signal of Biphase output */
#define SE (1 << 0) /* Fix the master clock */
/* CLK_RST */
#define CRB (1 << 4)
#define CRA (1 << 0)
/* IO SHIFT / MACRO */
#define BI_SHIFT 12
#define BO_SHIFT 8
#define AI_SHIFT 4
#define AO_SHIFT 0
#define AB_IO(param, shift) (param << shift)
/* SOFT_RST */
#define PBSR (1 << 12) /* Port B Software Reset */
#define PASR (1 << 8) /* Port A Software Reset */
#define IR (1 << 4) /* Interrupt Reset */
#define FSISR (1 << 0) /* Software Reset */
/* OUT_SEL (FSI2) */
#define DMMD (1 << 4) /* SPDIF output timing 0: Biphase only */
/* 1: Biphase and serial */
/* FIFO_SZ */
#define FIFO_SZ_MASK 0x7
#define FSI_RATES SNDRV_PCM_RATE_8000_96000
#define FSI_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
typedef int (*set_rate_func)(struct device *dev, int is_porta, int rate, int enable);
/*
* FSI driver use below type name for variable
*
* xxx_num : number of data
* xxx_pos : position of data
* xxx_capa : capacity of data
*/
/*
* period/frame/sample image
*
* ex) PCM (2ch)
*
* period pos period pos
* [n] [n + 1]
* |<-------------------- period--------------------->|
* ==|============================================ ... =|==
* | |
* ||<----- frame ----->|<------ frame ----->| ... |
* |+--------------------+--------------------+- ... |
* ||[ sample ][ sample ]|[ sample ][ sample ]| ... |
* |+--------------------+--------------------+- ... |
* ==|============================================ ... =|==
*/
/*
* FSI FIFO image
*
* | |
* | |
* | [ sample ] |
* | [ sample ] |
* | [ sample ] |
* | [ sample ] |
* --> go to codecs
*/
/*
* struct
*/
struct fsi_stream_handler;
struct fsi_stream {
/*
* these are initialized by fsi_stream_init()
*/
struct snd_pcm_substream *substream;
int fifo_sample_capa; /* sample capacity of FSI FIFO */
int buff_sample_capa; /* sample capacity of ALSA buffer */
int buff_sample_pos; /* sample position of ALSA buffer */
int period_samples; /* sample number / 1 period */
int period_pos; /* current period position */
int sample_width; /* sample width */
int uerr_num;
int oerr_num;
/*
* thse are initialized by fsi_handler_init()
*/
struct fsi_stream_handler *handler;
struct fsi_priv *priv;
};
struct fsi_priv {
void __iomem *base;
struct fsi_master *master;
struct fsi_stream playback;
struct fsi_stream capture;
u32 do_fmt;
u32 di_fmt;
int chan_num:16;
int clk_master:1;
int spdif:1;
long rate;
};
struct fsi_stream_handler {
int (*probe)(struct fsi_priv *fsi, struct fsi_stream *io);
int (*transfer)(struct fsi_priv *fsi, struct fsi_stream *io);
int (*remove)(struct fsi_priv *fsi, struct fsi_stream *io);
};
#define fsi_stream_handler_call(io, func, args...) \
(!(io) ? -ENODEV : \
!((io)->handler->func) ? 0 : \
(io)->handler->func(args))
struct fsi_core {
int ver;
u32 int_st;
u32 iemsk;
u32 imsk;
u32 a_mclk;
u32 b_mclk;
};
struct fsi_master {
void __iomem *base;
int irq;
struct fsi_priv fsia;
struct fsi_priv fsib;
struct fsi_core *core;
struct sh_fsi_platform_info *info;
spinlock_t lock;
};
static int fsi_stream_is_play(struct fsi_priv *fsi, struct fsi_stream *io);
/*
* basic read write function
*/
static void __fsi_reg_write(u32 __iomem *reg, u32 data)
{
/* valid data area is 24bit */
data &= 0x00ffffff;
__raw_writel(data, reg);
}
static u32 __fsi_reg_read(u32 __iomem *reg)
{
return __raw_readl(reg);
}
static void __fsi_reg_mask_set(u32 __iomem *reg, u32 mask, u32 data)
{
u32 val = __fsi_reg_read(reg);
val &= ~mask;
val |= data & mask;
__fsi_reg_write(reg, val);
}
#define fsi_reg_write(p, r, d)\
__fsi_reg_write((p->base + REG_##r), d)
#define fsi_reg_read(p, r)\
__fsi_reg_read((p->base + REG_##r))
#define fsi_reg_mask_set(p, r, m, d)\
__fsi_reg_mask_set((p->base + REG_##r), m, d)
#define fsi_master_read(p, r) _fsi_master_read(p, MST_##r)
#define fsi_core_read(p, r) _fsi_master_read(p, p->core->r)
static u32 _fsi_master_read(struct fsi_master *master, u32 reg)
{
u32 ret;
unsigned long flags;
spin_lock_irqsave(&master->lock, flags);
ret = __fsi_reg_read(master->base + reg);
spin_unlock_irqrestore(&master->lock, flags);
return ret;
}
#define fsi_master_mask_set(p, r, m, d) _fsi_master_mask_set(p, MST_##r, m, d)
#define fsi_core_mask_set(p, r, m, d) _fsi_master_mask_set(p, p->core->r, m, d)
static void _fsi_master_mask_set(struct fsi_master *master,
u32 reg, u32 mask, u32 data)
{
unsigned long flags;
spin_lock_irqsave(&master->lock, flags);
__fsi_reg_mask_set(master->base + reg, mask, data);
spin_unlock_irqrestore(&master->lock, flags);
}
/*
* basic function
*/
static struct fsi_master *fsi_get_master(struct fsi_priv *fsi)
{
return fsi->master;
}
static int fsi_is_clk_master(struct fsi_priv *fsi)
{
return fsi->clk_master;
}
static int fsi_is_port_a(struct fsi_priv *fsi)
{
return fsi->master->base == fsi->base;
}
static int fsi_is_spdif(struct fsi_priv *fsi)
{
return fsi->spdif;
}
static int fsi_is_play(struct snd_pcm_substream *substream)
{
return substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
}
static struct snd_soc_dai *fsi_get_dai(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
return rtd->cpu_dai;
}
static struct fsi_priv *fsi_get_priv_frm_dai(struct snd_soc_dai *dai)
{
struct fsi_master *master = snd_soc_dai_get_drvdata(dai);
if (dai->id == 0)
return &master->fsia;
else
return &master->fsib;
}
static struct fsi_priv *fsi_get_priv(struct snd_pcm_substream *substream)
{
return fsi_get_priv_frm_dai(fsi_get_dai(substream));
}
static set_rate_func fsi_get_info_set_rate(struct fsi_master *master)
{
if (!master->info)
return NULL;
return master->info->set_rate;
}
static u32 fsi_get_info_flags(struct fsi_priv *fsi)
{
int is_porta = fsi_is_port_a(fsi);
struct fsi_master *master = fsi_get_master(fsi);
if (!master->info)
return 0;
return is_porta ? master->info->porta_flags :
master->info->portb_flags;
}
static u32 fsi_get_port_shift(struct fsi_priv *fsi, int is_play)
{
int is_porta = fsi_is_port_a(fsi);
u32 shift;
if (is_porta)
shift = is_play ? AO_SHIFT : AI_SHIFT;
else
shift = is_play ? BO_SHIFT : BI_SHIFT;
return shift;
}
static int fsi_frame2sample(struct fsi_priv *fsi, int frames)
{
return frames * fsi->chan_num;
}
static int fsi_sample2frame(struct fsi_priv *fsi, int samples)
{
return samples / fsi->chan_num;
}
static int fsi_get_current_fifo_samples(struct fsi_priv *fsi,
struct fsi_stream *io)
{
int is_play = fsi_stream_is_play(fsi, io);
u32 status;
int frames;
status = is_play ?
fsi_reg_read(fsi, DOFF_ST) :
fsi_reg_read(fsi, DIFF_ST);
frames = 0x1ff & (status >> 8);
return fsi_frame2sample(fsi, frames);
}
static void fsi_count_fifo_err(struct fsi_priv *fsi)
{
u32 ostatus = fsi_reg_read(fsi, DOFF_ST);
u32 istatus = fsi_reg_read(fsi, DIFF_ST);
if (ostatus & ERR_OVER)
fsi->playback.oerr_num++;
if (ostatus & ERR_UNDER)
fsi->playback.uerr_num++;
if (istatus & ERR_OVER)
fsi->capture.oerr_num++;
if (istatus & ERR_UNDER)
fsi->capture.uerr_num++;
fsi_reg_write(fsi, DOFF_ST, 0);
fsi_reg_write(fsi, DIFF_ST, 0);
}
/*
* fsi_stream_xx() function
*/
static inline int fsi_stream_is_play(struct fsi_priv *fsi,
struct fsi_stream *io)
{
return &fsi->playback == io;
}
static inline struct fsi_stream *fsi_stream_get(struct fsi_priv *fsi,
int is_play)
{
return is_play ? &fsi->playback : &fsi->capture;
}
static int fsi_stream_is_working(struct fsi_priv *fsi,
int is_play)
{
struct fsi_stream *io = fsi_stream_get(fsi, is_play);
struct fsi_master *master = fsi_get_master(fsi);
unsigned long flags;
int ret;
spin_lock_irqsave(&master->lock, flags);
ret = !!io->substream;
spin_unlock_irqrestore(&master->lock, flags);
return ret;
}
static struct fsi_priv *fsi_stream_to_priv(struct fsi_stream *io)
{
return io->priv;
}
static void fsi_stream_init(struct fsi_priv *fsi,
int is_play,
struct snd_pcm_substream *substream)
{
struct fsi_stream *io = fsi_stream_get(fsi, is_play);
struct snd_pcm_runtime *runtime = substream->runtime;
struct fsi_master *master = fsi_get_master(fsi);
unsigned long flags;
spin_lock_irqsave(&master->lock, flags);
io->substream = substream;
io->buff_sample_capa = fsi_frame2sample(fsi, runtime->buffer_size);
io->buff_sample_pos = 0;
io->period_samples = fsi_frame2sample(fsi, runtime->period_size);
io->period_pos = 0;
io->sample_width = samples_to_bytes(runtime, 1);
io->oerr_num = -1; /* ignore 1st err */
io->uerr_num = -1; /* ignore 1st err */
spin_unlock_irqrestore(&master->lock, flags);
}
static void fsi_stream_quit(struct fsi_priv *fsi, int is_play)
{
struct fsi_stream *io = fsi_stream_get(fsi, is_play);
struct snd_soc_dai *dai = fsi_get_dai(io->substream);
struct fsi_master *master = fsi_get_master(fsi);
unsigned long flags;
spin_lock_irqsave(&master->lock, flags);
if (io->oerr_num > 0)
dev_err(dai->dev, "over_run = %d\n", io->oerr_num);
if (io->uerr_num > 0)
dev_err(dai->dev, "under_run = %d\n", io->uerr_num);
io->substream = NULL;
io->buff_sample_capa = 0;
io->buff_sample_pos = 0;
io->period_samples = 0;
io->period_pos = 0;
io->sample_width = 0;
io->oerr_num = 0;
io->uerr_num = 0;
spin_unlock_irqrestore(&master->lock, flags);
}
static int fsi_stream_transfer(struct fsi_stream *io)
{
struct fsi_priv *fsi = fsi_stream_to_priv(io);
if (!fsi)
return -EIO;
return fsi_stream_handler_call(io, transfer, fsi, io);
}
static int fsi_stream_probe(struct fsi_priv *fsi)
{
struct fsi_stream *io;
int ret1, ret2;
io = &fsi->playback;
ret1 = fsi_stream_handler_call(io, probe, fsi, io);
io = &fsi->capture;
ret2 = fsi_stream_handler_call(io, probe, fsi, io);
if (ret1 < 0)
return ret1;
if (ret2 < 0)
return ret2;
return 0;
}
static int fsi_stream_remove(struct fsi_priv *fsi)
{
struct fsi_stream *io;
int ret1, ret2;
io = &fsi->playback;
ret1 = fsi_stream_handler_call(io, remove, fsi, io);
io = &fsi->capture;
ret2 = fsi_stream_handler_call(io, remove, fsi, io);
if (ret1 < 0)
return ret1;
if (ret2 < 0)
return ret2;
return 0;
}
/*
* irq function
*/
static void fsi_irq_enable(struct fsi_priv *fsi, int is_play)
{
u32 data = AB_IO(1, fsi_get_port_shift(fsi, is_play));
struct fsi_master *master = fsi_get_master(fsi);
fsi_core_mask_set(master, imsk, data, data);
fsi_core_mask_set(master, iemsk, data, data);
}
static void fsi_irq_disable(struct fsi_priv *fsi, int is_play)
{
u32 data = AB_IO(1, fsi_get_port_shift(fsi, is_play));
struct fsi_master *master = fsi_get_master(fsi);
fsi_core_mask_set(master, imsk, data, 0);
fsi_core_mask_set(master, iemsk, data, 0);
}
static u32 fsi_irq_get_status(struct fsi_master *master)
{
return fsi_core_read(master, int_st);
}
static void fsi_irq_clear_status(struct fsi_priv *fsi)
{
u32 data = 0;
struct fsi_master *master = fsi_get_master(fsi);
data |= AB_IO(1, fsi_get_port_shift(fsi, 0));
data |= AB_IO(1, fsi_get_port_shift(fsi, 1));
/* clear interrupt factor */
fsi_core_mask_set(master, int_st, data, 0);
}
/*
* SPDIF master clock function
*
* These functions are used later FSI2
*/
static void fsi_spdif_clk_ctrl(struct fsi_priv *fsi, int enable)
{
struct fsi_master *master = fsi_get_master(fsi);
u32 mask, val;
if (master->core->ver < 2) {
pr_err("fsi: register access err (%s)\n", __func__);
return;
}
mask = BP | SE;
val = enable ? mask : 0;
fsi_is_port_a(fsi) ?
fsi_core_mask_set(master, a_mclk, mask, val) :
fsi_core_mask_set(master, b_mclk, mask, val);
}
/*
* clock function
*/
static int fsi_set_master_clk(struct device *dev, struct fsi_priv *fsi,
long rate, int enable)
{
struct fsi_master *master = fsi_get_master(fsi);
set_rate_func set_rate = fsi_get_info_set_rate(master);
int fsi_ver = master->core->ver;
int ret;
ret = set_rate(dev, fsi_is_port_a(fsi), rate, enable);
if (ret < 0) /* error */
return ret;
if (!enable)
return 0;
if (ret > 0) {
u32 data = 0;
switch (ret & SH_FSI_ACKMD_MASK) {
default:
/* FALL THROUGH */
case SH_FSI_ACKMD_512:
data |= (0x0 << 12);
break;
case SH_FSI_ACKMD_256:
data |= (0x1 << 12);
break;
case SH_FSI_ACKMD_128:
data |= (0x2 << 12);
break;
case SH_FSI_ACKMD_64:
data |= (0x3 << 12);
break;
case SH_FSI_ACKMD_32:
if (fsi_ver < 2)
dev_err(dev, "unsupported ACKMD\n");
else
data |= (0x4 << 12);
break;
}
switch (ret & SH_FSI_BPFMD_MASK) {
default:
/* FALL THROUGH */
case SH_FSI_BPFMD_32:
data |= (0x0 << 8);
break;
case SH_FSI_BPFMD_64:
data |= (0x1 << 8);
break;
case SH_FSI_BPFMD_128:
data |= (0x2 << 8);
break;
case SH_FSI_BPFMD_256:
data |= (0x3 << 8);
break;
case SH_FSI_BPFMD_512:
data |= (0x4 << 8);
break;
case SH_FSI_BPFMD_16:
if (fsi_ver < 2)
dev_err(dev, "unsupported ACKMD\n");
else
data |= (0x7 << 8);
break;
}
fsi_reg_mask_set(fsi, CKG1, (ACKMD_MASK | BPFMD_MASK) , data);
udelay(10);
ret = 0;
}
return ret;
}
#define fsi_port_start(f, i) __fsi_port_clk_ctrl(f, i, 1)
#define fsi_port_stop(f, i) __fsi_port_clk_ctrl(f, i, 0)
static void __fsi_port_clk_ctrl(struct fsi_priv *fsi, int is_play, int enable)
{
struct fsi_master *master = fsi_get_master(fsi);
u32 clk = fsi_is_port_a(fsi) ? CRA : CRB;
if (enable)
fsi_irq_enable(fsi, is_play);
else
fsi_irq_disable(fsi, is_play);
if (fsi_is_clk_master(fsi))
fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0);
}
/*
* pio data transfer handler
*/
static void fsi_pio_push16(struct fsi_priv *fsi, u8 *_buf, int samples)
{
u16 *buf = (u16 *)_buf;
int i;
for (i = 0; i < samples; i++)
fsi_reg_write(fsi, DODT, ((u32)*(buf + i) << 8));
}
static void fsi_pio_pop16(struct fsi_priv *fsi, u8 *_buf, int samples)
{
u16 *buf = (u16 *)_buf;
int i;
for (i = 0; i < samples; i++)
*(buf + i) = (u16)(fsi_reg_read(fsi, DIDT) >> 8);
}
static void fsi_pio_push32(struct fsi_priv *fsi, u8 *_buf, int samples)
{
u32 *buf = (u32 *)_buf;
int i;
for (i = 0; i < samples; i++)
fsi_reg_write(fsi, DODT, *(buf + i));
}
static void fsi_pio_pop32(struct fsi_priv *fsi, u8 *_buf, int samples)
{
u32 *buf = (u32 *)_buf;
int i;
for (i = 0; i < samples; i++)
*(buf + i) = fsi_reg_read(fsi, DIDT);
}
static u8 *fsi_pio_get_area(struct fsi_priv *fsi, struct fsi_stream *io)
{
struct snd_pcm_runtime *runtime = io->substream->runtime;
return runtime->dma_area +
samples_to_bytes(runtime, io->buff_sample_pos);
}
static int fsi_pio_transfer(struct fsi_priv *fsi, struct fsi_stream *io,
void (*run16)(struct fsi_priv *fsi, u8 *buf, int samples),
void (*run32)(struct fsi_priv *fsi, u8 *buf, int samples),
int samples)
{
struct snd_pcm_runtime *runtime;
struct snd_pcm_substream *substream;
u8 *buf;
int over_period;
if (!fsi ||
!io->substream ||
!io->substream->runtime)
return -EINVAL;
over_period = 0;
substream = io->substream;
runtime = substream->runtime;
/* FSI FIFO has limit.
* So, this driver can not send periods data at a time
*/
if (io->buff_sample_pos >=
io->period_samples * (io->period_pos + 1)) {
over_period = 1;
io->period_pos = (io->period_pos + 1) % runtime->periods;
if (0 == io->period_pos)
io->buff_sample_pos = 0;
}
buf = fsi_pio_get_area(fsi, io);
switch (io->sample_width) {
case 2:
run16(fsi, buf, samples);
break;
case 4:
run32(fsi, buf, samples);
break;
default:
return -EINVAL;
}
/* update buff_sample_pos */
io->buff_sample_pos += samples;
if (over_period)
snd_pcm_period_elapsed(substream);
return 0;
}
static int fsi_pio_pop(struct fsi_priv *fsi, struct fsi_stream *io)
{
int sample_residues; /* samples in FSI fifo */
int sample_space; /* ALSA free samples space */
int samples;
sample_residues = fsi_get_current_fifo_samples(fsi, io);
sample_space = io->buff_sample_capa - io->buff_sample_pos;
samples = min(sample_residues, sample_space);
return fsi_pio_transfer(fsi, io,
fsi_pio_pop16,
fsi_pio_pop32,
samples);
}
static int fsi_pio_push(struct fsi_priv *fsi, struct fsi_stream *io)
{
int sample_residues; /* ALSA residue samples */
int sample_space; /* FSI fifo free samples space */
int samples;
sample_residues = io->buff_sample_capa - io->buff_sample_pos;
sample_space = io->fifo_sample_capa -
fsi_get_current_fifo_samples(fsi, io);
samples = min(sample_residues, sample_space);
return fsi_pio_transfer(fsi, io,
fsi_pio_push16,
fsi_pio_push32,
samples);
}
static struct fsi_stream_handler fsi_pio_push_handler = {
.transfer = fsi_pio_push,
};
static struct fsi_stream_handler fsi_pio_pop_handler = {
.transfer = fsi_pio_pop,
};
static irqreturn_t fsi_interrupt(int irq, void *data)
{
struct fsi_master *master = data;
u32 int_st = fsi_irq_get_status(master);
/* clear irq status */
fsi_master_mask_set(master, SOFT_RST, IR, 0);
fsi_master_mask_set(master, SOFT_RST, IR, IR);
if (int_st & AB_IO(1, AO_SHIFT))
fsi_stream_transfer(&master->fsia.playback);
if (int_st & AB_IO(1, BO_SHIFT))
fsi_stream_transfer(&master->fsib.playback);
if (int_st & AB_IO(1, AI_SHIFT))
fsi_stream_transfer(&master->fsia.capture);
if (int_st & AB_IO(1, BI_SHIFT))
fsi_stream_transfer(&master->fsib.capture);
fsi_count_fifo_err(&master->fsia);
fsi_count_fifo_err(&master->fsib);
fsi_irq_clear_status(&master->fsia);
fsi_irq_clear_status(&master->fsib);
return IRQ_HANDLED;
}
/*
* dai ops
*/
static void fsi_fifo_init(struct fsi_priv *fsi,
int is_play,
struct device *dev)
{
struct fsi_master *master = fsi_get_master(fsi);
struct fsi_stream *io = fsi_stream_get(fsi, is_play);
u32 shift, i;
int frame_capa;
/* get on-chip RAM capacity */
shift = fsi_master_read(master, FIFO_SZ);
shift >>= fsi_get_port_shift(fsi, is_play);
shift &= FIFO_SZ_MASK;
frame_capa = 256 << shift;
dev_dbg(dev, "fifo = %d words\n", frame_capa);
/*
* The maximum number of sample data varies depending
* on the number of channels selected for the format.
*
* FIFOs are used in 4-channel units in 3-channel mode
* and in 8-channel units in 5- to 7-channel mode
* meaning that more FIFOs than the required size of DPRAM
* are used.
*
* ex) if 256 words of DP-RAM is connected
* 1 channel: 256 (256 x 1 = 256)
* 2 channels: 128 (128 x 2 = 256)
* 3 channels: 64 ( 64 x 3 = 192)
* 4 channels: 64 ( 64 x 4 = 256)
* 5 channels: 32 ( 32 x 5 = 160)
* 6 channels: 32 ( 32 x 6 = 192)
* 7 channels: 32 ( 32 x 7 = 224)
* 8 channels: 32 ( 32 x 8 = 256)
*/
for (i = 1; i < fsi->chan_num; i <<= 1)
frame_capa >>= 1;
dev_dbg(dev, "%d channel %d store\n",
fsi->chan_num, frame_capa);
io->fifo_sample_capa = fsi_frame2sample(fsi, frame_capa);
/*
* set interrupt generation factor
* clear FIFO
*/
if (is_play) {
fsi_reg_write(fsi, DOFF_CTL, IRQ_HALF);
fsi_reg_mask_set(fsi, DOFF_CTL, FIFO_CLR, FIFO_CLR);
} else {
fsi_reg_write(fsi, DIFF_CTL, IRQ_HALF);
fsi_reg_mask_set(fsi, DIFF_CTL, FIFO_CLR, FIFO_CLR);
}
}
static int fsi_hw_startup(struct fsi_priv *fsi,
int is_play,
struct device *dev)
{
struct fsi_master *master = fsi_get_master(fsi);
int fsi_ver = master->core->ver;
u32 flags = fsi_get_info_flags(fsi);
u32 data = 0;
/* clock setting */
if (fsi_is_clk_master(fsi))
data = DIMD | DOMD;
fsi_reg_mask_set(fsi, CKG1, (DIMD | DOMD), data);
/* clock inversion (CKG2) */
data = 0;
if (SH_FSI_LRM_INV & flags)
data |= 1 << 12;
if (SH_FSI_BRM_INV & flags)
data |= 1 << 8;
if (SH_FSI_LRS_INV & flags)
data |= 1 << 4;
if (SH_FSI_BRS_INV & flags)
data |= 1 << 0;
fsi_reg_write(fsi, CKG2, data);
/* set format */
fsi_reg_write(fsi, DO_FMT, fsi->do_fmt);
fsi_reg_write(fsi, DI_FMT, fsi->di_fmt);
/* spdif ? */
if (fsi_is_spdif(fsi)) {
fsi_spdif_clk_ctrl(fsi, 1);
fsi_reg_mask_set(fsi, OUT_SEL, DMMD, DMMD);
}
/*
* FIXME
*
* FSI driver assumed that data package is in-back.
* FSI2 chip can select it.
*/
if (fsi_ver >= 2) {
fsi_reg_write(fsi, OUT_DMAC, (1 << 4));
fsi_reg_write(fsi, IN_DMAC, (1 << 4));
}
/* irq clear */
fsi_irq_disable(fsi, is_play);
fsi_irq_clear_status(fsi);
/* fifo init */
fsi_fifo_init(fsi, is_play, dev);
return 0;
}
static void fsi_hw_shutdown(struct fsi_priv *fsi,
struct device *dev)
{
if (fsi_is_clk_master(fsi))
fsi_set_master_clk(dev, fsi, fsi->rate, 0);
}
static int fsi_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct fsi_priv *fsi = fsi_get_priv(substream);
int is_play = fsi_is_play(substream);
return fsi_hw_startup(fsi, is_play, dai->dev);
}
static void fsi_dai_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct fsi_priv *fsi = fsi_get_priv(substream);
fsi_hw_shutdown(fsi, dai->dev);
fsi->rate = 0;
}
static int fsi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct fsi_priv *fsi = fsi_get_priv(substream);
struct fsi_stream *io = fsi_stream_get(fsi, fsi_is_play(substream));
int is_play = fsi_is_play(substream);
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
fsi_stream_init(fsi, is_play, substream);
ret = fsi_stream_transfer(io);
if (0 == ret)
fsi_port_start(fsi, is_play);
break;
case SNDRV_PCM_TRIGGER_STOP:
fsi_port_stop(fsi, is_play);
fsi_stream_quit(fsi, is_play);
break;
}
return ret;
}
static int fsi_set_fmt_dai(struct fsi_priv *fsi, unsigned int fmt)
{
u32 data = 0;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
data = CR_I2S;
fsi->chan_num = 2;
break;
case SND_SOC_DAIFMT_LEFT_J:
data = CR_PCM;
fsi->chan_num = 2;
break;
default:
return -EINVAL;
}
fsi->do_fmt = data;
fsi->di_fmt = data;
return 0;
}
static int fsi_set_fmt_spdif(struct fsi_priv *fsi)
{
struct fsi_master *master = fsi_get_master(fsi);
u32 data = 0;
if (master->core->ver < 2)
return -EINVAL;
data = CR_BWS_16 | CR_DTMD_SPDIF_PCM | CR_PCM;
fsi->chan_num = 2;
fsi->spdif = 1;
fsi->do_fmt = data;
fsi->di_fmt = data;
return 0;
}
static int fsi_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct fsi_priv *fsi = fsi_get_priv_frm_dai(dai);
struct fsi_master *master = fsi_get_master(fsi);
set_rate_func set_rate = fsi_get_info_set_rate(master);
u32 flags = fsi_get_info_flags(fsi);
int ret;
/* set master/slave audio interface */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
fsi->clk_master = 1;
break;
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
if (fsi_is_clk_master(fsi) && !set_rate) {
dev_err(dai->dev, "platform doesn't have set_rate\n");
return -EINVAL;
}
/* set format */
switch (flags & SH_FSI_FMT_MASK) {
case SH_FSI_FMT_DAI:
ret = fsi_set_fmt_dai(fsi, fmt & SND_SOC_DAIFMT_FORMAT_MASK);
break;
case SH_FSI_FMT_SPDIF:
ret = fsi_set_fmt_spdif(fsi);
break;
default:
ret = -EINVAL;
}
return ret;
}
static int fsi_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct fsi_priv *fsi = fsi_get_priv(substream);
long rate = params_rate(params);
int ret;
if (!fsi_is_clk_master(fsi))
return 0;
ret = fsi_set_master_clk(dai->dev, fsi, rate, 1);
if (ret < 0)
return ret;
fsi->rate = rate;
return ret;
}
static const struct snd_soc_dai_ops fsi_dai_ops = {
.startup = fsi_dai_startup,
.shutdown = fsi_dai_shutdown,
.trigger = fsi_dai_trigger,
.set_fmt = fsi_dai_set_fmt,
.hw_params = fsi_dai_hw_params,
};
/*
* 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_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 fsi_priv *fsi = fsi_get_priv(substream);
struct fsi_stream *io = fsi_stream_get(fsi, fsi_is_play(substream));
int samples_pos = io->buff_sample_pos - 1;
if (samples_pos < 0)
samples_pos = 0;
return fsi_sample2frame(fsi, samples_pos);
}
static struct snd_pcm_ops fsi_pcm_ops = {
.open = fsi_pcm_open,
.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_soc_pcm_runtime *rtd)
{
struct snd_pcm *pcm = rtd->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
*/
static struct snd_soc_dai_driver fsi_soc_dai[] = {
{
.name = "fsia-dai",
.playback = {
.rates = FSI_RATES,
.formats = FSI_FMTS,
.channels_min = 1,
.channels_max = 8,
},
.capture = {
.rates = FSI_RATES,
.formats = FSI_FMTS,
.channels_min = 1,
.channels_max = 8,
},
.ops = &fsi_dai_ops,
},
{
.name = "fsib-dai",
.playback = {
.rates = FSI_RATES,
.formats = FSI_FMTS,
.channels_min = 1,
.channels_max = 8,
},
.capture = {
.rates = FSI_RATES,
.formats = FSI_FMTS,
.channels_min = 1,
.channels_max = 8,
},
.ops = &fsi_dai_ops,
},
};
static struct snd_soc_platform_driver fsi_soc_platform = {
.ops = &fsi_pcm_ops,
.pcm_new = fsi_pcm_new,
.pcm_free = fsi_pcm_free,
};
/*
* platform function
*/
static void fsi_handler_init(struct fsi_priv *fsi)
{
fsi->playback.handler = &fsi_pio_push_handler; /* default PIO */
fsi->playback.priv = fsi;
fsi->capture.handler = &fsi_pio_pop_handler; /* default PIO */
fsi->capture.priv = fsi;
}
static int fsi_probe(struct platform_device *pdev)
{
struct fsi_master *master;
const struct platform_device_id *id_entry;
struct resource *res;
unsigned int irq;
int ret;
id_entry = pdev->id_entry;
if (!id_entry) {
dev_err(&pdev->dev, "unknown fsi device\n");
return -ENODEV;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
if (!res || (int)irq <= 0) {
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 setting */
master->irq = irq;
master->info = pdev->dev.platform_data;
master->core = (struct fsi_core *)id_entry->driver_data;
spin_lock_init(&master->lock);
/* FSI A setting */
master->fsia.base = master->base;
master->fsia.master = master;
fsi_handler_init(&master->fsia);
ret = fsi_stream_probe(&master->fsia);
if (ret < 0) {
dev_err(&pdev->dev, "FSIA stream probe failed\n");
goto exit_iounmap;
}
/* FSI B setting */
master->fsib.base = master->base + 0x40;
master->fsib.master = master;
fsi_handler_init(&master->fsib);
ret = fsi_stream_probe(&master->fsib);
if (ret < 0) {
dev_err(&pdev->dev, "FSIB stream probe failed\n");
goto exit_fsia;
}
pm_runtime_enable(&pdev->dev);
dev_set_drvdata(&pdev->dev, master);
ret = request_irq(irq, &fsi_interrupt, 0,
id_entry->name, master);
if (ret) {
dev_err(&pdev->dev, "irq request err\n");
goto exit_fsib;
}
ret = snd_soc_register_platform(&pdev->dev, &fsi_soc_platform);
if (ret < 0) {
dev_err(&pdev->dev, "cannot snd soc register\n");
goto exit_free_irq;
}
ret = snd_soc_register_dais(&pdev->dev, fsi_soc_dai,
ARRAY_SIZE(fsi_soc_dai));
if (ret < 0) {
dev_err(&pdev->dev, "cannot snd dai register\n");
goto exit_snd_soc;
}
return ret;
exit_snd_soc:
snd_soc_unregister_platform(&pdev->dev);
exit_free_irq:
free_irq(irq, master);
exit_fsib:
fsi_stream_remove(&master->fsib);
exit_fsia:
fsi_stream_remove(&master->fsia);
exit_iounmap:
iounmap(master->base);
pm_runtime_disable(&pdev->dev);
exit_kfree:
kfree(master);
master = NULL;
exit:
return ret;
}
static int fsi_remove(struct platform_device *pdev)
{
struct fsi_master *master;
master = dev_get_drvdata(&pdev->dev);
free_irq(master->irq, master);
pm_runtime_disable(&pdev->dev);
snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(fsi_soc_dai));
snd_soc_unregister_platform(&pdev->dev);
fsi_stream_remove(&master->fsia);
fsi_stream_remove(&master->fsib);
iounmap(master->base);
kfree(master);
return 0;
}
static void __fsi_suspend(struct fsi_priv *fsi,
int is_play,
struct device *dev)
{
if (!fsi_stream_is_working(fsi, is_play))
return;
fsi_port_stop(fsi, is_play);
fsi_hw_shutdown(fsi, dev);
}
static void __fsi_resume(struct fsi_priv *fsi,
int is_play,
struct device *dev)
{
if (!fsi_stream_is_working(fsi, is_play))
return;
fsi_hw_startup(fsi, is_play, dev);
if (fsi_is_clk_master(fsi) && fsi->rate)
fsi_set_master_clk(dev, fsi, fsi->rate, 1);
fsi_port_start(fsi, is_play);
}
static int fsi_suspend(struct device *dev)
{
struct fsi_master *master = dev_get_drvdata(dev);
struct fsi_priv *fsia = &master->fsia;
struct fsi_priv *fsib = &master->fsib;
__fsi_suspend(fsia, 1, dev);
__fsi_suspend(fsia, 0, dev);
__fsi_suspend(fsib, 1, dev);
__fsi_suspend(fsib, 0, dev);
return 0;
}
static int fsi_resume(struct device *dev)
{
struct fsi_master *master = dev_get_drvdata(dev);
struct fsi_priv *fsia = &master->fsia;
struct fsi_priv *fsib = &master->fsib;
__fsi_resume(fsia, 1, dev);
__fsi_resume(fsia, 0, dev);
__fsi_resume(fsib, 1, dev);
__fsi_resume(fsib, 0, dev);
return 0;
}
static struct dev_pm_ops fsi_pm_ops = {
.suspend = fsi_suspend,
.resume = fsi_resume,
};
static struct fsi_core fsi1_core = {
.ver = 1,
/* Interrupt */
.int_st = INT_ST,
.iemsk = IEMSK,
.imsk = IMSK,
};
static struct fsi_core fsi2_core = {
.ver = 2,
/* Interrupt */
.int_st = CPU_INT_ST,
.iemsk = CPU_IEMSK,
.imsk = CPU_IMSK,
.a_mclk = A_MST_CTLR,
.b_mclk = B_MST_CTLR,
};
static struct platform_device_id fsi_id_table[] = {
{ "sh_fsi", (kernel_ulong_t)&fsi1_core },
{ "sh_fsi2", (kernel_ulong_t)&fsi2_core },
{},
};
MODULE_DEVICE_TABLE(platform, fsi_id_table);
static struct platform_driver fsi_driver = {
.driver = {
.name = "fsi-pcm-audio",
.pm = &fsi_pm_ops,
},
.probe = fsi_probe,
.remove = fsi_remove,
.id_table = fsi_id_table,
};
module_platform_driver(fsi_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("SuperH onchip FSI audio driver");
MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");
MODULE_ALIAS("platform:fsi-pcm-audio");
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