sparc dbri: fixed setting of burst size after reset
PATCH 1/1 sparc dbri: fixed setting of burst size after reset
From: Krzysztof Helt ([email protected])
A proper way to set DBRI's burst size. The size must be set after each chip reset.
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sound/sparc/dbri.c renamed from alsa-kernel/sparc/dbri.c +9 -8
@@ -690,6 +690,7 @@ static void dbri_cmdsend(struct snd_dbristatic 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 *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_dfor (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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