diff options
| -rw-r--r-- | sound/sparc/dbri.c | 385 |
1 files changed, 192 insertions, 193 deletions
diff --git a/sound/sparc/dbri.c b/sound/sparc/dbri.c index 5696f79..3fb2ede 100644 --- a/sound/sparc/dbri.c +++ b/sound/sparc/dbri.c @@ -2,6 +2,8 @@ * Driver for DBRI sound chip found on Sparcs. * Copyright (C) 2004, 2005 Martin Habets (mhabets@users.sourceforge.net) * + * Converted to ring buffered version by Krzysztof Helt (krzysztof.h1@wp.pl) + * * Based entirely upon drivers/sbus/audio/dbri.c which is: * Copyright (C) 1997 Rudolf Koenig (rfkoenig@immd4.informatik.uni-erlangen.de) * Copyright (C) 1998, 1999 Brent Baccala (baccala@freesoft.org) @@ -260,7 +262,7 @@ struct dbri_mem { * the CPU and the DBRI */ struct dbri_dma { - volatile s32 cmd[DBRI_NO_CMDS]; /* Place for commands */ + s32 cmd[DBRI_NO_CMDS]; /* Place for commands */ volatile s32 intr[DBRI_INT_BLK]; /* Interrupt field */ struct dbri_mem desc[DBRI_NO_DESCS]; /* Xmit/receive descriptors */ }; @@ -284,7 +286,6 @@ struct dbri_pipe { struct dbri_streaminfo { struct snd_pcm_substream *substream; u32 dvma_buffer; /* Device view of Alsa DMA buffer */ - int left; /* # of bytes left in DMA buffer */ int size; /* Size of DMA buffer */ size_t offset; /* offset in user buffer */ int pipe; /* Data pipe used */ @@ -305,11 +306,11 @@ struct snd_dbri { void __iomem *regs; /* dbri HW regs */ int dbri_irqp; /* intr queue pointer */ - int wait_send; /* sequence of command buffers send */ - int wait_ackd; /* sequence of command buffers acknowledged */ struct dbri_pipe pipes[DBRI_NO_PIPES]; /* DBRI's 32 data pipes */ int next_desc[DBRI_NO_DESCS]; /* Index of next desc, or -1 */ + spinlock_t cmdlock; /* Protects cmd queue accesses */ + s32 *cmdptr; /* Pointer to the last queued cmd */ int chi_bpf; @@ -544,7 +545,7 @@ struct snd_dbri { #define DBRI_TD_TBC (1<<0) /* Transmit buffer Complete */ #define DBRI_TD_STATUS(v) ((v)&0xff) /* Transmit status */ /* Maximum buffer size per TD: almost 8Kb */ -#define DBRI_TD_MAXCNT ((1 << 13) - 1) +#define DBRI_TD_MAXCNT ((1 << 13) - 4) /* Receive descriptor defines */ #define DBRI_RD_F (1<<31) /* End of Frame */ @@ -608,79 +609,110 @@ The list is terminated with a WAIT command, which generates a CPU interrupt to signal completion. Since the DBRI can run in parallel with the CPU, several means of -synchronization present themselves. The method implemented here is close -to the original scheme (Rudolf's), and uses 2 counters (wait_send and -wait_ackd) to synchronize the command buffer between the CPU and the DBRI. +synchronization present themselves. The method implemented here is only +to use the dbri_cmdwait() to wait for execution of batch of sent commands. -A more sophisticated scheme might involve a circular command buffer -or an array of command buffers. A routine could fill one with -commands and link it onto a list. When a interrupt signaled -completion of the current command buffer, look on the list for -the next one. +A circular command buffer is used here. A new command is being added +while other can be executed. The scheme works by adding two WAIT commands +after each sent batch of commands. When the next batch is prepared it is +added after the WAIT commands then the WAITs are replaced with single JUMP +command to the new batch. The the DBRI is forced to reread the last WAIT +command (replaced by the JUMP by then). If the DBRI is still executing +previous commands the request to reread the WAIT command is ignored. Every time a routine wants to write commands to the DBRI, it must -first call dbri_cmdlock() and get an initial pointer into dbri->dma->cmd -in return. dbri_cmdlock() will block if the previous commands have not -been completed yet. After this the commands can be written to the buffer, -and dbri_cmdsend() is called with the final pointer value to send them -to the DBRI. +first call dbri_cmdlock() and get pointer to a free space in +dbri->dma->cmd buffer. After this, the commands can be written to +the buffer, and dbri_cmdsend() is called with the final pointer value +to send them to the DBRI. */ static void dbri_process_interrupt_buffer(struct snd_dbri * dbri); -enum dbri_lock { NoGetLock, GetLock }; #define MAXLOOPS 10 - -static volatile s32 *dbri_cmdlock(struct snd_dbri * dbri, enum dbri_lock get) +/* + * Wait for the current command string to execute + */ +static void dbri_cmdwait(struct snd_dbri *dbri) { int maxloops = MAXLOOPS; -#ifndef SMP - if ((get == GetLock) && spin_is_locked(&dbri->lock)) { - printk(KERN_ERR "DBRI: cmdlock called while in spinlock."); - } -#endif - /* Delay if previous commands are still being processed */ - while ((--maxloops) > 0 && (dbri->wait_send != dbri->wait_ackd)) { + while ((--maxloops) > 0 && (sbus_readl(dbri->regs + REG0) & D_P)) msleep_interruptible(1); - } + if (maxloops == 0) { - printk(KERN_ERR "DBRI: Chip never completed command buffer %d\n", - dbri->wait_send); + printk(KERN_ERR "DBRI: Chip never completed command buffer\n"); } else { dprintk(D_CMD, "Chip completed command buffer (%d)\n", MAXLOOPS - maxloops - 1); } +} +/* + * Lock the command queue and returns pointer to a space for len cmd words + * It locks the cmdlock spinlock. + */ +static s32 *dbri_cmdlock(struct snd_dbri * dbri, int len) +{ + /* Space for 2 WAIT cmds (replaced later by 1 JUMP cmd) */ + len += 2; + spin_lock(&dbri->cmdlock); + if (dbri->cmdptr - dbri->dma->cmd + len < DBRI_NO_CMDS - 2) + return dbri->cmdptr + 2; + else if (len < sbus_readl(dbri->regs + REG8) - dbri->dma_dvma) + return dbri->dma->cmd; + else + printk(KERN_ERR "DBRI: no space for commands."); - /*if (get == GetLock) spin_lock(&dbri->lock); */ - return &dbri->dma->cmd[0]; + return 0; } -static void dbri_cmdsend(struct snd_dbri * dbri, volatile s32 * cmd) +/* + * Send prepared cmd string. It works by writting a JMP cmd into + * the last WAIT cmd and force DBRI to reread the cmd. + * The JMP cmd points to the new cmd string. + * It also releases the cmdlock spinlock. + */ +static void dbri_cmdsend(struct snd_dbri * dbri, s32 * cmd,int len) { - volatile s32 *ptr; + s32 *ptr; + s32 tmp, addr; + static int wait_id = 0; - for (ptr = &dbri->dma->cmd[0]; ptr < cmd; ptr++) { - dprintk(D_CMD, "cmd: %lx:%08x\n", (unsigned long)ptr, *ptr); - } + wait_id++; + wait_id &= 0xffff; /* restrict it to a 16 bit counter. */ + *(cmd) = DBRI_CMD(D_WAIT, 1, wait_id); + *(cmd+1) = DBRI_CMD(D_WAIT, 1, wait_id); - if ((cmd - &dbri->dma->cmd[0]) >= DBRI_NO_CMDS - 1) { - printk(KERN_ERR "DBRI: Command buffer overflow! (bug in driver)\n"); - /* Ignore the last part. */ - cmd = &dbri->dma->cmd[DBRI_NO_CMDS - 3]; - } + /* Replace the last command with JUMP */ + addr = dbri->dma_dvma + (cmd - len - dbri->dma->cmd) * sizeof(s32); + *(dbri->cmdptr+1) = addr; + *(dbri->cmdptr) = DBRI_CMD(D_JUMP, 0, 0); - dbri->wait_send++; - dbri->wait_send &= 0xffff; /* restrict it to a 16 bit counter. */ - *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); - *(cmd++) = DBRI_CMD(D_WAIT, 1, dbri->wait_send); +#ifdef DBRI_DEBUG + if (cmd > dbri->cmdptr ) + for (ptr = dbri->cmdptr; ptr < cmd+2; ptr++) { + dprintk(D_CMD, "cmd: %lx:%08x\n", (unsigned long)ptr, *ptr); + } + else { + ptr = dbri->cmdptr; + dprintk(D_CMD, "cmd: %lx:%08x\n", (unsigned long)ptr, *ptr); + ptr = dbri->cmdptr+1; + dprintk(D_CMD, "cmd: %lx:%08x\n", (unsigned long)ptr, *ptr); + for (ptr = dbri->dma->cmd; ptr < cmd+2; ptr++) { + dprintk(D_CMD, "cmd: %lx:%08x\n", (unsigned long)ptr, *ptr); + } + } +#endif - /* Set command pointer and signal it is valid. */ - sbus_writel(dbri->dma_dvma, dbri->regs + REG8); + /* Reread the last command */ + tmp = sbus_readl(dbri->regs + REG0); + tmp |= D_P; + sbus_writel(tmp, dbri->regs + REG0); - /*spin_unlock(&dbri->lock); */ + dbri->cmdptr = cmd; + spin_unlock(&dbri->cmdlock); } /* Lock must be held when calling this */ @@ -709,7 +741,7 @@ static void dbri_reset(struct snd_dbri * dbri) /* Lock must not be held before calling this */ static void dbri_initialize(struct snd_dbri * dbri) { - volatile s32 *cmd; + s32 *cmd; u32 dma_addr; unsigned long flags; int n; @@ -718,14 +750,11 @@ static void dbri_initialize(struct snd_dbri * dbri) dbri_reset(dbri); - cmd = dbri_cmdlock(dbri, NoGetLock); - dprintk(D_GEN, "init: cmd: %p, int: %p\n", - &dbri->dma->cmd[0], &dbri->dma->intr[0]); - /* Initialize pipes */ for (n = 0; n < DBRI_NO_PIPES; n++) dbri->pipes[n].desc = dbri->pipes[n].first_desc = -1; + spin_lock_init(&dbri->cmdlock); /* * Initialize the interrupt ringbuffer. */ @@ -735,10 +764,19 @@ static void dbri_initialize(struct snd_dbri * dbri) /* * Set up the interrupt queue */ + spin_lock(&dbri->cmdlock); + cmd = dbri->cmdptr = dbri->dma->cmd; *(cmd++) = DBRI_CMD(D_IIQ, 0, 0); *(cmd++) = dma_addr; + *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); + dbri->cmdptr = cmd; + *(cmd++) = DBRI_CMD(D_WAIT, 1, 0); + *(cmd++) = DBRI_CMD(D_WAIT, 1, 0); + dma_addr = dbri->dma_dvma + dbri_dma_off(cmd, 0); + sbus_writel(dma_addr, dbri->regs + REG8); + spin_unlock(&dbri->cmdlock); + dbri_cmdwait(dbri); - dbri_cmdsend(dbri, cmd); spin_unlock_irqrestore(&dbri->lock, flags); } @@ -770,7 +808,7 @@ static void reset_pipe(struct snd_dbri * dbri, int pipe) { int sdp; int desc; - volatile int *cmd; + s32 *cmd; if (pipe < 0 || pipe > DBRI_MAX_PIPE) { printk(KERN_ERR "DBRI: reset_pipe called with illegal pipe number\n"); @@ -783,16 +821,18 @@ static void reset_pipe(struct snd_dbri * dbri, int pipe) return; } - cmd = dbri_cmdlock(dbri, NoGetLock); + cmd = dbri_cmdlock(dbri, 3); *(cmd++) = DBRI_CMD(D_SDP, 0, sdp | D_SDP_C | D_SDP_P); *(cmd++) = 0; - dbri_cmdsend(dbri, cmd); + *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); + dbri_cmdsend(dbri, cmd, 3); desc = dbri->pipes[pipe].first_desc; - while (desc != -1) { - dbri->dma->desc[desc].nda = dbri->dma->desc[desc].ba = 0; - desc = dbri->next_desc[desc]; - } + if ( desc >= 0) + do { + dbri->dma->desc[desc].nda = dbri->dma->desc[desc].ba = 0; + desc = dbri->next_desc[desc]; + } while (desc != -1 && desc != dbri->pipes[pipe].first_desc); dbri->pipes[pipe].desc = -1; dbri->pipes[pipe].first_desc = -1; @@ -828,7 +868,7 @@ static void link_time_slot(struct snd_dbri * dbri, int pipe, int prevpipe, int nextpipe, int length, int cycle) { - volatile s32 *cmd; + s32 *cmd; int val; if (pipe < 0 || pipe > DBRI_MAX_PIPE @@ -847,11 +887,10 @@ static void link_time_slot(struct snd_dbri * dbri, int pipe, } dbri->pipes[prevpipe].nextpipe = pipe; - dbri->pipes[pipe].nextpipe = nextpipe; dbri->pipes[pipe].length = length; - cmd = dbri_cmdlock(dbri, NoGetLock); + cmd = dbri_cmdlock(dbri, 4); if (dbri->pipes[pipe].sdp & D_SDP_TO_SER) { /* Deal with CHI special case: @@ -874,25 +913,27 @@ static void link_time_slot(struct snd_dbri * dbri, int pipe, D_TS_LEN(length) | D_TS_CYCLE(cycle) | D_TS_NEXT(nextpipe); *(cmd++) = 0; } + *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); - dbri_cmdsend(dbri, cmd); + dbri_cmdsend(dbri, cmd, 4); } static void unlink_time_slot(struct snd_dbri * dbri, int pipe, enum in_or_out direction, int prevpipe, int nextpipe) { - volatile s32 *cmd; + s32 *cmd; int val; if (pipe < 0 || pipe > DBRI_MAX_PIPE - || prevpipe < 0 || prevpipe > DBRI_MAX_PIPE) { + || prevpipe < 0 || prevpipe > DBRI_MAX_PIPE + || nextpipe < 0 || nextpipe > DBRI_MAX_PIPE) { printk(KERN_ERR "DBRI: unlink_time_slot called with illegal pipe number\n"); return; } - cmd = dbri_cmdlock(dbri, NoGetLock); + cmd = dbri_cmdlock(dbri, 4); if (direction == PIPEinput) { val = D_DTS_VI | D_DTS_DEL | D_DTS_PRVIN(prevpipe) | pipe; @@ -905,8 +946,9 @@ static void unlink_time_slot(struct snd_dbri * dbri, int pipe, *(cmd++) = 0; *(cmd++) = D_TS_NEXT(nextpipe); } + *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); - dbri_cmdsend(dbri, cmd); + dbri_cmdsend(dbri, cmd, 4); } /* xmit_fixed() / recv_fixed() @@ -925,7 +967,7 @@ static void unlink_time_slot(struct snd_dbri * dbri, int pipe, */ static void xmit_fixed(struct snd_dbri * dbri, int pipe, unsigned int data) { - volatile s32 *cmd; + s32 *cmd; if (pipe < 16 || pipe > DBRI_MAX_PIPE) { printk(KERN_ERR "DBRI: xmit_fixed: Illegal pipe number\n"); @@ -952,12 +994,14 @@ static void xmit_fixed(struct snd_dbri * dbri, int pipe, unsigned int data) if (dbri->pipes[pipe].sdp & D_SDP_MSB) data = reverse_bytes(data, dbri->pipes[pipe].length); - cmd = dbri_cmdlock(dbri, GetLock); + cmd = dbri_cmdlock(dbri, 3); *(cmd++) = DBRI_CMD(D_SSP, 0, pipe); *(cmd++) = data; + *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); - dbri_cmdsend(dbri, cmd); + dbri_cmdsend(dbri, cmd, 3); + dbri_cmdwait(dbri); } static void recv_fixed(struct snd_dbri * dbri, int pipe, volatile __u32 * ptr) @@ -991,6 +1035,8 @@ static void recv_fixed(struct snd_dbri * dbri, int pipe, volatile __u32 * ptr) * and work by building chains of descriptors which identify the * data buffers. Buffers too large for a single descriptor will * be spread across multiple descriptors. + * + * All descriptors create a ring buffer. */ static int setup_descs(struct snd_dbri * dbri, int streamno, unsigned int period) { @@ -1051,14 +1097,13 @@ static int setup_descs(struct snd_dbri * dbri, int streamno, unsigned int period return -1; } - if (len > DBRI_TD_MAXCNT) { - mylen = DBRI_TD_MAXCNT; /* 8KB - 1 */ - } else { + if (len > DBRI_TD_MAXCNT) + mylen = DBRI_TD_MAXCNT; /* 8KB - 4 */ + else mylen = len; - } - if (mylen > period) { + + if (mylen > period) mylen = period; - } dbri->next_desc[desc] = -1; dbri->dma->desc[desc].ba = dvma_buffer; @@ -1067,17 +1112,17 @@ static int setup_descs(struct snd_dbri * dbri, int streamno, unsigned int period if (streamno == DBRI_PLAY) { dbri->dma->desc[desc].word1 = DBRI_TD_CNT(mylen); dbri->dma->desc[desc].word4 = 0; - if (first_desc != -1) - dbri->dma->desc[desc].word1 |= DBRI_TD_M; + dbri->dma->desc[desc].word1 |= + DBRI_TD_F | DBRI_TD_B; } else { dbri->dma->desc[desc].word1 = 0; dbri->dma->desc[desc].word4 = DBRI_RD_B | DBRI_RD_BCNT(mylen); } - if (first_desc == -1) { + if (first_desc == -1) first_desc = desc; - } else { + else { dbri->next_desc[last_desc] = desc; dbri->dma->desc[last_desc].nda = dbri->dma_dvma + dbri_dma_off(desc, desc); @@ -1093,21 +1138,28 @@ static int setup_descs(struct snd_dbri * dbri, int streamno, unsigned int period return -1; } - dbri->dma->desc[last_desc].word1 &= ~DBRI_TD_M; if (streamno == DBRI_PLAY) { dbri->dma->desc[last_desc].word1 |= - DBRI_TD_I | DBRI_TD_F | DBRI_TD_B; + DBRI_TD_F | DBRI_TD_B; + dbri->dma->desc[last_desc].nda = + dbri->dma_dvma + dbri_dma_off(desc, first_desc); + dbri->next_desc[last_desc] = first_desc; } dbri->pipes[info->pipe].first_desc = first_desc; dbri->pipes[info->pipe].desc = first_desc; - for (desc = first_desc; desc != -1; desc = dbri->next_desc[desc]) { +#ifdef DBRI_DEBUG + for (desc = first_desc; desc != -1; ) { dprintk(D_DESC, "DESC %d: %08x %08x %08x %08x\n", desc, dbri->dma->desc[desc].word1, dbri->dma->desc[desc].ba, dbri->dma->desc[desc].nda, dbri->dma->desc[desc].word4); + desc = dbri->next_desc[desc]; + if ( desc == first_desc ) + break; } +#endif return 0; } @@ -1127,43 +1179,24 @@ enum master_or_slave { CHImaster, CHIslave }; static void reset_chi(struct snd_dbri * dbri, enum master_or_slave master_or_slave, int bits_per_frame) { - volatile s32 *cmd; + s32 *cmd; int val; - static int chi_initialized = 0; /* FIXME: mutex? */ - - if (!chi_initialized) { - cmd = dbri_cmdlock(dbri, GetLock); + /* Set CHI Anchor: Pipe 16 */ - /* Set CHI Anchor: Pipe 16 */ - - val = D_DTS_VO | D_DTS_VI | D_DTS_INS - | D_DTS_PRVIN(16) | D_PIPE(16) | D_DTS_PRVOUT(16); - *(cmd++) = DBRI_CMD(D_DTS, 0, val); - *(cmd++) = D_TS_ANCHOR | D_TS_NEXT(16); - *(cmd++) = D_TS_ANCHOR | D_TS_NEXT(16); + cmd = dbri_cmdlock(dbri, 4); + val = D_DTS_VO | D_DTS_VI | D_DTS_INS + | D_DTS_PRVIN(16) | D_PIPE(16) | D_DTS_PRVOUT(16); + *(cmd++) = DBRI_CMD(D_DTS, 0, val); + *(cmd++) = D_TS_ANCHOR | D_TS_NEXT(16); + *(cmd++) = D_TS_ANCHOR | D_TS_NEXT(16); + *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); + dbri_cmdsend(dbri, cmd, 4); - dbri->pipes[16].sdp = 1; - dbri->pipes[16].nextpipe = 16; + dbri->pipes[16].sdp = 1; + dbri->pipes[16].nextpipe = 16; -#if 0 - chi_initialized++; -#endif - } else { - int pipe; - - for (pipe = 0; pipe < DBRI_NO_PIPES; pipe++ ) - if ( pipe != 16 ) { - if (dbri->pipes[pipe].sdp & D_SDP_TO_SER) - unlink_time_slot(dbri, pipe, PIPEoutput, - 16, dbri->pipes[pipe].nextpipe); - else - unlink_time_slot(dbri, pipe, PIPEinput, - 16, dbri->pipes[pipe].nextpipe); - } - - cmd = dbri_cmdlock(dbri, GetLock); - } + cmd = dbri_cmdlock(dbri, 4); if (master_or_slave == CHIslave) { /* Setup DBRI for CHI Slave - receive clock, frame sync (FS) @@ -1202,8 +1235,9 @@ static void reset_chi(struct snd_dbri * dbri, enum master_or_slave master_or_sla *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); *(cmd++) = DBRI_CMD(D_CDM, 0, D_CDM_XCE | D_CDM_XEN | D_CDM_REN); + *(cmd++) = DBRI_CMD(D_PAUSE, 0, 0); - dbri_cmdsend(dbri, cmd); + dbri_cmdsend(dbri, cmd, 4); } /* @@ -1240,6 +1274,8 @@ 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); + + dbri_cmdwait(dbri); } static int cs4215_init_data(struct cs4215 *mm) @@ -1271,7 +1307,7 @@ static int cs4215_init_data(struct cs4215 *mm) mm->status = 0; mm->version = 0xff; mm->precision = 8; /* For ULAW */ - mm->channels = 2; + mm->channels = 1; return 0; } @@ -1554,7 +1590,6 @@ static int cs4215_init(struct snd_dbri * dbri) } cs4215_setup_pipes(dbri); - cs4215_init_data(&dbri->mm); /* Enable capture of the status & version timeslots. */ @@ -1583,9 +1618,7 @@ buffer and calls dbri_process_one_interrupt() for each interrupt word. Complicated interrupts are handled by dedicated functions (which appear first in this file). Any pending interrupts can be serviced by calling dbri_process_interrupt_buffer(), which works even if the CPU's -interrupts are disabled. This function is used by dbri_cmdlock() -to make sure we're synced up with the chip before each command sequence, -even if we're running cli'ed. +interrupts are disabled. */ @@ -1594,11 +1627,10 @@ even if we're running cli'ed. * Transmit the current TD's for recording/playing, if needed. * For playback, ALSA has filled the DMA memory with new data (we hope). */ -static void xmit_descs(unsigned long data) +static void xmit_descs(struct snd_dbri *dbri) { - struct snd_dbri *dbri = (struct snd_dbri *) data; struct dbri_streaminfo *info; - volatile s32 *cmd; + s32 *cmd; unsigned long flags; int first_td; @@ -1609,7 +1641,7 @@ static void xmit_descs(unsigned long data) info = &dbri->stream_info[DBRI_REC]; spin_lock_irqsave(&dbri->lock, flags); - if ((info->left >= info->size) && (info->pipe >= 0)) { + if (info->pipe >= 0) { first_td = dbri->pipes[info->pipe].first_desc; dprintk(D_DESC, "xmit_descs rec @ TD %d\n", first_td); @@ -1619,16 +1651,15 @@ static void xmit_descs(unsigned long data) goto play; } - cmd = dbri_cmdlock(dbri, NoGetLock); + cmd = dbri_cmdlock(dbri, 2); *(cmd++) = DBRI_CMD(D_SDP, 0, dbri->pipes[info->pipe].sdp | D_SDP_P | D_SDP_EVERY | D_SDP_C); *(cmd++) = dbri->dma_dvma + dbri_dma_off(desc, first_td); - dbri_cmdsend(dbri, cmd); + dbri_cmdsend(dbri, cmd, 2); /* Reset our admin of the pipe & bytes read. */ dbri->pipes[info->pipe].desc = first_td; - info->left = 0; } play: @@ -1638,33 +1669,27 @@ play: info = &dbri->stream_info[DBRI_PLAY]; spin_lock_irqsave(&dbri->lock, flags); - if ((info->left <= 0) && (info->pipe >= 0)) { + if (info->pipe >= 0) { first_td = dbri->pipes[info->pipe].first_desc; dprintk(D_DESC, "xmit_descs play @ TD %d\n", first_td); /* Stream could be closed by the time we run. */ - if (first_td < 0) { - spin_unlock_irqrestore(&dbri->lock, flags); - return; - } - - cmd = dbri_cmdlock(dbri, NoGetLock); - *(cmd++) = DBRI_CMD(D_SDP, 0, - dbri->pipes[info->pipe].sdp - | D_SDP_P | D_SDP_EVERY | D_SDP_C); - *(cmd++) = dbri->dma_dvma + dbri_dma_off(desc, first_td); - dbri_cmdsend(dbri, cmd); + if (first_td >= 0) { + cmd = dbri_cmdlock(dbri, 2); + *(cmd++) = DBRI_CMD(D_SDP, 0, + dbri->pipes[info->pipe].sdp + | D_SDP_P | D_SDP_EVERY | D_SDP_C); + *(cmd++) = dbri->dma_dvma + dbri_dma_off(desc, first_td); + dbri_cmdsend(dbri, cmd, 2); - /* Reset our admin of the pipe & bytes written. */ - dbri->pipes[info->pipe].desc = first_td; - info->left = info->size; + /* Reset our admin of the pipe & bytes written. */ + dbri->pipes[info->pipe].desc = first_td; + } } spin_unlock_irqrestore(&dbri->lock, flags); } -static DECLARE_TASKLET(xmit_descs_task, xmit_descs, 0); - /* transmission_complete_intr() * * Called by main interrupt handler when DBRI signals transmission complete @@ -1684,7 +1709,6 @@ static void transmission_complete_intr(struct snd_dbri * dbri, int pipe) struct dbri_streaminfo *info; int td; int status; - int len; info = &dbri->stream_info[DBRI_PLAY]; @@ -1703,20 +1727,7 @@ static void transmission_complete_intr(struct snd_dbri * dbri, int pipe) dprintk(D_INT, "TD %d, status 0x%02x\n", td, status); dbri->dma->desc[td].word4 = 0; /* Reset it for next time. */ - len = DBRI_RD_CNT(dbri->dma->desc[td].word1); - info->offset += len; - info->left -= len; - - /* On the last TD, transmit them all again. */ - if (dbri->next_desc[td] == -1) { - if (info->left > 0) { - printk(KERN_WARNING - "%d bytes left after last transfer.\n", - info->left); - info->left = 0; - } - tasklet_schedule(&xmit_descs_task); - } + info->offset += DBRI_RD_CNT(dbri->dma->desc[td].word1); td = dbri->next_desc[td]; dbri->pipes[pipe].desc = td; @@ -1749,7 +1760,6 @@ static void reception_complete_intr(struct snd_dbri * dbri, int pipe) info = &dbri->stream_info[DBRI_REC]; info->offset += DBRI_RD_CNT(status); - info->left += DBRI_RD_CNT(status); /* FIXME: Check status */ @@ -1757,6 +1767,7 @@ static void reception_complete_intr(struct snd_dbri * dbri, int pipe) rd, DBRI_RD_STATUS(status), DBRI_RD_CNT(status)); /* On the last TD, transmit them all again. */ +#if 0 if (dbri->next_desc[rd] == -1) { if (info->left > info->size) { printk(KERN_WARNING @@ -1765,6 +1776,7 @@ static void reception_complete_intr(struct snd_dbri * dbri, int pipe) } tasklet_schedule(&xmit_descs_task); } +#endif /* Notify ALSA */ if (spin_is_locked(&dbri->lock)) { @@ -1793,16 +1805,11 @@ static void dbri_process_one_interrupt(struct snd_dbri * dbri, int x) channel, code, rval); } - if (channel == D_INTR_CMD && command == D_WAIT) { - dbri->wait_ackd = val; - if (dbri->wait_send != val) { - printk(KERN_ERR "Processing wait command %d when %d was send.\n", - val, dbri->wait_send); - } - return; - } - switch (code) { + case D_INTR_CMDI: + if (command != D_WAIT) + printk(KERN_ERR "DBRI: Command read interrupt\n"); + break; case D_INTR_BRDY: reception_complete_intr(dbri, channel); break; @@ -1815,8 +1822,10 @@ static void dbri_process_one_interrupt(struct snd_dbri * dbri, int x) * resend SDP command with clear pipe bit (C) set */ { - volatile s32 *cmd; - + /* FIXME: do something useful in case of underrun */ + printk(KERN_ERR "DBRI: Underrun error\n"); +#if 0 + s32 *cmd; int pipe = channel; int td = dbri->pipes[pipe].desc; @@ -1827,6 +1836,7 @@ static void dbri_process_one_interrupt(struct snd_dbri * dbri, int x) | D_SDP_P | D_SDP_C | D_SDP_2SAME); *(cmd++) = dbri->dma_dvma + dbri_dma_off(desc, td); dbri_cmdsend(dbri, cmd); +#endif } break; case D_INTR_FXDT: @@ -1847,9 +1857,7 @@ static void dbri_process_one_interrupt(struct snd_dbri * dbri, int x) /* dbri_process_interrupt_buffer advances through the DBRI's interrupt * buffer until it finds a zero word (indicating nothing more to do * right now). Non-zero words require processing and are handed off - * to dbri_process_one_interrupt AFTER advancing the pointer. This - * order is important since we might recurse back into this function - * and need to make sure the pointer has been advanced first. + * to dbri_process_one_interrupt AFTER advancing the pointer. */ static void dbri_process_interrupt_buffer(struct snd_dbri * dbri) { @@ -1919,8 +1927,6 @@ static irqreturn_t snd_dbri_interrupt(int irq, void *dev_id, dbri_process_interrupt_buffer(dbri); - /* FIXME: Write 0 into regs to ACK interrupt */ - spin_unlock(&dbri->lock); return IRQ_HANDLED; @@ -1962,7 +1968,6 @@ static int snd_dbri_open(struct snd_pcm_substream *substream) spin_lock_irqsave(&dbri->lock, flags); info->substream = substream; - info->left = 0; info->offset = 0; info->dvma_buffer = 0; info->pipe = -1; @@ -1980,7 +1985,6 @@ static int snd_dbri_close(struct snd_pcm_substream *substream) dprintk(D_USR, "close audio output.\n"); info->substream = NULL; - info->left = 0; info->offset = 0; return 0; @@ -2062,10 +2066,8 @@ static int snd_dbri_prepare(struct snd_pcm_substream *substream) info->size = snd_pcm_lib_buffer_bytes(substream); if (DBRI_STREAMNO(substream) == DBRI_PLAY) info->pipe = 4; /* Send pipe */ - else { + else info->pipe = 6; /* Receive pipe */ - info->left = info->size; /* To trigger submittal */ - } spin_lock_irq(&dbri->lock); @@ -2093,14 +2095,11 @@ static int snd_dbri_trigger(struct snd_pcm_substream *substream, int cmd) case SNDRV_PCM_TRIGGER_START: dprintk(D_USR, "start audio, period is %d bytes\n", (int)snd_pcm_lib_period_bytes(substream)); - /* Enable & schedule the tasklet that re-submits the TDs. */ - xmit_descs_task.data = (unsigned long)dbri; - tasklet_schedule(&xmit_descs_task); + /* Re-submit the TDs. */ + xmit_descs(dbri); break; case SNDRV_PCM_TRIGGER_STOP: dprintk(D_USR, "stop audio.\n"); - /* Make the tasklet bail out immediately. */ - xmit_descs_task.data = 0; reset_pipe(dbri, info->pipe); break; default: @@ -2118,8 +2117,8 @@ static snd_pcm_uframes_t snd_dbri_pointer(struct snd_pcm_substream *substream) ret = bytes_to_frames(substream->runtime, info->offset) % substream->runtime->buffer_size; - dprintk(D_USR, "I/O pointer: %ld frames, %d bytes left.\n", - ret, info->left); + dprintk(D_USR, "I/O pointer: %ld frames of %ld.\n", + ret, substream->runtime->buffer_size); return ret; } |
