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ASoC: sh: fsi: cleanup suspend/resume 

Current FSI driver was using saved_xxx variable for suspend/resume.
OTOH, the start and stop of power/clock are controlled by
fsi_hw_startup/fsi_hw_shutdown in current FSI driver.
The all necessary registers value are set by fsi_hw_startup.

So, if fsi_hw_shutdown is called when "suspend" is generated,
and fsi_hw_startup is called at "resume",
the saved_xxx are not needed.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Kuninori Morimoto 2011-05-23 20:46:35 +09:00 committed by Mark Brown
parent 4c48125331
commit cda828cafe
1 changed files with 42 additions and 55 deletions
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97
sound/soc/sh/fsi.c
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@ -184,13 +184,6 @@ struct fsi_priv {
int spdif:1;
long rate;
/* for suspend/resume */
u32 saved_do_fmt;
u32 saved_di_fmt;
u32 saved_ckg1;
u32 saved_ckg2;
u32 saved_out_sel;
};
struct fsi_core {
@ -211,14 +204,6 @@ struct fsi_master {
struct fsi_core *core;
struct sh_fsi_platform_info *info;
spinlock_t lock;
/* for suspend/resume */
u32 saved_a_mclk;
u32 saved_b_mclk;
u32 saved_iemsk;
u32 saved_imsk;
u32 saved_clk_rst;
u32 saved_soft_rst;
};
/*
@ -388,6 +373,21 @@ static int fsi_sample2frame(struct fsi_priv *fsi, int samples)
return samples / fsi->chan_num;
}
static int fsi_stream_is_working(struct fsi_priv *fsi,
int is_play)
{
struct fsi_stream *io = fsi_get_stream(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 void fsi_stream_push(struct fsi_priv *fsi,
int is_play,
struct snd_pcm_substream *substream)
@ -666,7 +666,6 @@ static int fsi_set_master_clk(struct device *dev, struct fsi_priv *fsi,
}
return ret;
}
#define fsi_port_start(f, i) __fsi_port_clk_ctrl(f, i, 1)
@ -675,14 +674,13 @@ 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;
int is_master = fsi_is_clk_master(fsi);
if (enable)
fsi_irq_enable(fsi, is_play);
else
fsi_irq_disable(fsi, is_play);
if (is_master)
if (fsi_is_clk_master(fsi))
fsi_master_mask_set(master, CLK_RST, clk, (enable) ? clk : 0);
}
@ -1327,48 +1325,43 @@ static int fsi_remove(struct platform_device *pdev)
}
static void __fsi_suspend(struct fsi_priv *fsi,
int is_play,
struct device *dev)
{
fsi->saved_do_fmt = fsi_reg_read(fsi, DO_FMT);
fsi->saved_di_fmt = fsi_reg_read(fsi, DI_FMT);
fsi->saved_ckg1 = fsi_reg_read(fsi, CKG1);
fsi->saved_ckg2 = fsi_reg_read(fsi, CKG2);
fsi->saved_out_sel = fsi_reg_read(fsi, OUT_SEL);
if (!fsi_stream_is_working(fsi, is_play))
return;
if (fsi_is_clk_master(fsi))
fsi_set_master_clk(dev, fsi, fsi->rate, 0);
fsi_port_stop(fsi, is_play);
fsi_hw_shutdown(fsi, is_play, dev);
}
static void __fsi_resume(struct fsi_priv *fsi,
int is_play,
struct device *dev)
{
fsi_reg_write(fsi, DO_FMT, fsi->saved_do_fmt);
fsi_reg_write(fsi, DI_FMT, fsi->saved_di_fmt);
fsi_reg_write(fsi, CKG1, fsi->saved_ckg1);
fsi_reg_write(fsi, CKG2, fsi->saved_ckg2);
fsi_reg_write(fsi, OUT_SEL, fsi->saved_out_sel);
if (!fsi_stream_is_working(fsi, is_play))
return;
if (fsi_is_clk_master(fsi))
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;
pm_runtime_get_sync(dev);
__fsi_suspend(fsia, 1, dev);
__fsi_suspend(fsia, 0, dev);
__fsi_suspend(&master->fsia, dev);
__fsi_suspend(&master->fsib, dev);
master->saved_a_mclk = fsi_core_read(master, a_mclk);
master->saved_b_mclk = fsi_core_read(master, b_mclk);
master->saved_iemsk = fsi_core_read(master, iemsk);
master->saved_imsk = fsi_core_read(master, imsk);
master->saved_clk_rst = fsi_master_read(master, CLK_RST);
master->saved_soft_rst = fsi_master_read(master, SOFT_RST);
pm_runtime_put_sync(dev);
__fsi_suspend(fsib, 1, dev);
__fsi_suspend(fsib, 0, dev);
return 0;
}
@ -1376,20 +1369,14 @@ static int fsi_suspend(struct device *dev)
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;
pm_runtime_get_sync(dev);
__fsi_resume(fsia, 1, dev);
__fsi_resume(fsia, 0, dev);
fsi_master_mask_set(master, SOFT_RST, 0xffff, master->saved_soft_rst);
fsi_master_mask_set(master, CLK_RST, 0xffff, master->saved_clk_rst);
fsi_core_mask_set(master, a_mclk, 0xffff, master->saved_a_mclk);
fsi_core_mask_set(master, b_mclk, 0xffff, master->saved_b_mclk);
fsi_core_mask_set(master, iemsk, 0xffff, master->saved_iemsk);
fsi_core_mask_set(master, imsk, 0xffff, master->saved_imsk);
__fsi_resume(&master->fsia, dev);
__fsi_resume(&master->fsib, dev);
pm_runtime_put_sync(dev);
__fsi_resume(fsib, 1, dev);
__fsi_resume(fsib, 0, dev);
return 0;
}