diff options
Diffstat (limited to 'sound/sparc/dbri.c')
| -rw-r--r-- | sound/sparc/dbri.c | 65 |
1 files changed, 48 insertions, 17 deletions
diff --git a/sound/sparc/dbri.c b/sound/sparc/dbri.c index 82d5e8072f2b..e4935fca12df 100644 --- a/sound/sparc/dbri.c +++ b/sound/sparc/dbri.c @@ -635,10 +635,16 @@ to send them to the DBRI. static void dbri_cmdwait(struct snd_dbri *dbri) { int maxloops = MAXLOOPS; + unsigned long flags; /* Delay if previous commands are still being processed */ - while ((--maxloops) > 0 && (sbus_readl(dbri->regs + REG0) & D_P)) + spin_lock_irqsave(&dbri->lock, flags); + while ((--maxloops) > 0 && (sbus_readl(dbri->regs + REG0) & D_P)) { + spin_unlock_irqrestore(&dbri->lock, flags); msleep_interruptible(1); + spin_lock_irqsave(&dbri->lock, flags); + } + spin_unlock_irqrestore(&dbri->lock, flags); if (maxloops == 0) { printk(KERN_ERR "DBRI: Chip never completed command buffer\n"); @@ -671,11 +677,12 @@ static s32 *dbri_cmdlock(struct snd_dbri * dbri, int len) * the last WAIT cmd and force DBRI to reread the cmd. * The JUMP cmd points to the new cmd string. * It also releases the cmdlock spinlock. + * + * Lock must not be held before calling this. */ static void dbri_cmdsend(struct snd_dbri * dbri, s32 * cmd,int len) { s32 tmp, addr; - unsigned long flags; static int wait_id = 0; wait_id++; @@ -706,12 +713,10 @@ static void dbri_cmdsend(struct snd_dbri * dbri, s32 * cmd,int len) } #endif - spin_lock_irqsave(&dbri->lock, flags); /* Reread the last command */ tmp = sbus_readl(dbri->regs + REG0); tmp |= D_P; sbus_writel(tmp, dbri->regs + REG0); - spin_unlock_irqrestore(&dbri->lock, flags); dbri->cmdptr = cmd; spin_unlock(&dbri->cmdlock); @@ -777,9 +782,9 @@ static void dbri_initialize(struct snd_dbri * dbri) dma_addr = dbri->dma_dvma + dbri_dma_off(cmd, 0); sbus_writel(dma_addr, dbri->regs + REG8); spin_unlock(&dbri->cmdlock); - dbri_cmdwait(dbri); spin_unlock_irqrestore(&dbri->lock, flags); + dbri_cmdwait(dbri); } /* @@ -840,6 +845,9 @@ static void reset_pipe(struct snd_dbri * dbri, int pipe) dbri->pipes[pipe].first_desc = -1; } +/* + * Lock must be held before calling this. + */ static void setup_pipe(struct snd_dbri * dbri, int pipe, int sdp) { if (pipe < 0 || pipe > DBRI_MAX_PIPE) { @@ -866,6 +874,9 @@ static void setup_pipe(struct snd_dbri * dbri, int pipe, int sdp) reset_pipe(dbri, pipe); } +/* + * Lock must be held before calling this. + */ static void link_time_slot(struct snd_dbri * dbri, int pipe, int prevpipe, int nextpipe, int length, int cycle) @@ -920,6 +931,10 @@ static void link_time_slot(struct snd_dbri * dbri, int pipe, dbri_cmdsend(dbri, cmd, 4); } +#if 0 +/* + * Lock must be held before calling this. + */ static void unlink_time_slot(struct snd_dbri * dbri, int pipe, enum in_or_out direction, int prevpipe, int nextpipe) @@ -952,6 +967,7 @@ static void unlink_time_slot(struct snd_dbri * dbri, int pipe, dbri_cmdsend(dbri, cmd, 4); } +#endif /* xmit_fixed() / recv_fixed() * @@ -965,11 +981,14 @@ static void unlink_time_slot(struct snd_dbri * dbri, int pipe, * the actual time slot is. The interrupt handler takes care of bit * ordering and alignment. An 8-bit time slot will always end up * in the low-order 8 bits, filled either MSB-first or LSB-first, - * depending on the settings passed to setup_pipe() + * depending on the settings passed to setup_pipe(). + * + * Lock must not be held before calling it. */ static void xmit_fixed(struct snd_dbri * dbri, int pipe, unsigned int data) { s32 *cmd; + unsigned long flags; if (pipe < 16 || pipe > DBRI_MAX_PIPE) { printk(KERN_ERR "DBRI: xmit_fixed: Illegal pipe number\n"); @@ -1002,8 +1021,11 @@ static void xmit_fixed(struct snd_dbri * dbri, int pipe, unsigned int data) *(cmd++) = data; *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); + spin_lock_irqsave(&dbri->lock, flags); dbri_cmdsend(dbri, cmd, 3); + spin_unlock_irqrestore(&dbri->lock, flags); dbri_cmdwait(dbri); + } static void recv_fixed(struct snd_dbri * dbri, int pipe, volatile __u32 * ptr) @@ -1039,6 +1061,8 @@ static void recv_fixed(struct snd_dbri * dbri, int pipe, volatile __u32 * ptr) * be spread across multiple descriptors. * * All descriptors create a ring buffer. + * + * Lock must be held before calling this. */ static int setup_descs(struct snd_dbri * dbri, int streamno, unsigned int period) { @@ -1186,6 +1210,9 @@ multiplexed serial interface which the DBRI can operate in either master enum master_or_slave { CHImaster, CHIslave }; +/* + * Lock must not be held before calling it. + */ static void reset_chi(struct snd_dbri * dbri, enum master_or_slave master_or_slave, int bits_per_frame) { @@ -1258,9 +1285,14 @@ static void reset_chi(struct snd_dbri * dbri, enum master_or_slave master_or_sla In the standard SPARC audio configuration, the CS4215 codec is attached to the DBRI via the CHI interface and few of the DBRI's PIO pins. + * Lock must not be held before calling it. + */ static void cs4215_setup_pipes(struct snd_dbri * dbri) { + unsigned long flags; + + spin_lock_irqsave(&dbri->lock, flags); /* * Data mode: * Pipe 4: Send timeslots 1-4 (audio data) @@ -1284,6 +1316,7 @@ static void cs4215_setup_pipes(struct snd_dbri * dbri) setup_pipe(dbri, 17, D_SDP_FIXED | D_SDP_TO_SER | D_SDP_MSB); setup_pipe(dbri, 18, D_SDP_FIXED | D_SDP_FROM_SER | D_SDP_MSB); setup_pipe(dbri, 19, D_SDP_FIXED | D_SDP_FROM_SER | D_SDP_MSB); + spin_unlock_irqrestore(&dbri->lock, flags); dbri_cmdwait(dbri); } @@ -1358,6 +1391,7 @@ static void cs4215_open(struct snd_dbri * dbri) { int data_width; u32 tmp; + unsigned long flags; dprintk(D_MM, "cs4215_open: %d channels, %d bits\n", dbri->mm.channels, dbri->mm.precision); @@ -1382,6 +1416,7 @@ static void cs4215_open(struct snd_dbri * dbri) * bits. The CS4215, it seems, observes TSIN (the delayed signal) * even if it's the CHI master. Don't ask me... */ + spin_lock_irqsave(&dbri->lock, flags); tmp = sbus_readl(dbri->regs + REG0); tmp &= ~(D_C); /* Disable CHI */ sbus_writel(tmp, dbri->regs + REG0); @@ -1409,6 +1444,7 @@ static void cs4215_open(struct snd_dbri * dbri) tmp = sbus_readl(dbri->regs + REG0); tmp |= D_C; /* Enable CHI */ sbus_writel(tmp, dbri->regs + REG0); + spin_unlock_irqrestore(&dbri->lock, flags); cs4215_setdata(dbri, 0); } @@ -1420,6 +1456,7 @@ static int cs4215_setctrl(struct snd_dbri * dbri) { int i, val; u32 tmp; + unsigned long flags; /* FIXME - let the CPU do something useful during these delays */ @@ -1456,6 +1493,7 @@ static int cs4215_setctrl(struct snd_dbri * dbri) * done in hardware by a TI 248 that delays the DBRI->4215 * frame sync signal by eight clock cycles. Anybody know why? */ + spin_lock_irqsave(&dbri->lock, flags); tmp = sbus_readl(dbri->regs + REG0); tmp &= ~D_C; /* Disable CHI */ sbus_writel(tmp, dbri->regs + REG0); @@ -1472,14 +1510,17 @@ static int cs4215_setctrl(struct snd_dbri * dbri) link_time_slot(dbri, 17, 16, 16, 32, dbri->mm.offset); link_time_slot(dbri, 18, 16, 16, 8, dbri->mm.offset); link_time_slot(dbri, 19, 18, 16, 8, dbri->mm.offset + 48); + spin_unlock_irqrestore(&dbri->lock, flags); /* Wait for the chip to echo back CLB (Control Latch Bit) as zero */ dbri->mm.ctrl[0] &= ~CS4215_CLB; xmit_fixed(dbri, 17, *(int *)dbri->mm.ctrl); + spin_lock_irqsave(&dbri->lock, flags); tmp = sbus_readl(dbri->regs + REG0); tmp |= D_C; /* Enable CHI */ sbus_writel(tmp, dbri->regs + REG0); + spin_unlock_irqrestore(&dbri->lock, flags); for (i = 10; ((dbri->mm.status & 0xe4) != 0x20); --i) { msleep_interruptible(1); @@ -1688,6 +1729,7 @@ static void xmit_descs(struct snd_dbri *dbri) dbri->pipes[info->pipe].desc = first_td; } } + spin_unlock_irqrestore(&dbri->lock, flags); } @@ -2093,7 +2135,6 @@ static int snd_dbri_prepare(struct snd_pcm_substream *substream) { struct snd_dbri *dbri = snd_pcm_substream_chip(substream); struct dbri_streaminfo *info = DBRI_STREAM(dbri, substream); - struct snd_pcm_runtime *runtime = substream->runtime; int ret; info->size = snd_pcm_lib_buffer_bytes(substream); @@ -2232,7 +2273,6 @@ static int snd_cs4215_put_volume(struct snd_kcontrol *kcontrol, { struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol); struct dbri_streaminfo *info = &dbri->stream_info[kcontrol->private_value]; - unsigned long flags; int changed = 0; if (info->left_gain != ucontrol->value.integer.value[0]) { @@ -2247,13 +2287,9 @@ static int snd_cs4215_put_volume(struct snd_kcontrol *kcontrol, /* First mute outputs, and wait 1/8000 sec (125 us) * to make sure this takes. This avoids clicking noises. */ - spin_lock_irqsave(&dbri->lock, flags); - cs4215_setdata(dbri, 1); udelay(125); cs4215_setdata(dbri, 0); - - spin_unlock_irqrestore(&dbri->lock, flags); } return changed; } @@ -2300,7 +2336,6 @@ static int snd_cs4215_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct snd_dbri *dbri = snd_kcontrol_chip(kcontrol); - unsigned long flags; int elem = kcontrol->private_value & 0xff; int shift = (kcontrol->private_value >> 8) & 0xff; int mask = (kcontrol->private_value >> 16) & 0xff; @@ -2333,13 +2368,9 @@ static int snd_cs4215_put_single(struct snd_kcontrol *kcontrol, /* First mute outputs, and wait 1/8000 sec (125 us) * to make sure this takes. This avoids clicking noises. */ - spin_lock_irqsave(&dbri->lock, flags); - cs4215_setdata(dbri, 1); udelay(125); cs4215_setdata(dbri, 0); - - spin_unlock_irqrestore(&dbri->lock, flags); } return changed; } |