提交 d1fdf07e 编写于 作者: K Krzysztof Helt 提交者: Jaroslav Kysela

[ALSA] sparc dbri: fixed setting of burst size after reset

A proper way to set DBRI's burst size. The size must be set after
each chip reset.
Signed-off-by: NKrzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>
上级 470f1f1a
......@@ -690,6 +690,7 @@ static void dbri_cmdsend(struct snd_dbri * dbri, volatile s32 * cmd)
static void dbri_reset(struct snd_dbri * dbri)
{
int i;
u32 tmp;
dprintk(D_GEN, "reset 0:%x 2:%x 8:%x 9:%x\n",
sbus_readl(dbri->regs + REG0),
......@@ -699,13 +700,20 @@ static void dbri_reset(struct snd_dbri * dbri)
sbus_writel(D_R, dbri->regs + REG0); /* Soft Reset */
for (i = 0; (sbus_readl(dbri->regs + REG0) & D_R) && i < 64; i++)
udelay(10);
/* A brute approach - DBRI falls back to working burst size by itself
* On SS20 D_S does not work, so do not try so high. */
tmp = sbus_readl(dbri->regs + REG0);
tmp |= D_G | D_E;
tmp &= ~D_S;
sbus_writel(tmp, dbri->regs + REG0);
}
/* Lock must not be held before calling this */
static void dbri_initialize(struct snd_dbri * dbri)
{
volatile s32 *cmd;
u32 dma_addr, tmp;
u32 dma_addr;
unsigned long flags;
int n;
......@@ -721,13 +729,6 @@ static void dbri_initialize(struct snd_dbri * dbri)
for (n = 0; n < DBRI_NO_PIPES; n++)
dbri->pipes[n].desc = dbri->pipes[n].first_desc = -1;
/* A brute approach - DBRI falls back to working burst size by itself
* On SS20 D_S does not work, so do not try so high. */
tmp = sbus_readl(dbri->regs + REG0);
tmp |= D_G | D_E;
tmp &= ~D_S;
sbus_writel(tmp, dbri->regs + REG0);
/*
* Initialize the interrupt ringbuffer.
*/
......
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