diff options
Diffstat (limited to 'sound/drivers/vx/vx_pcm.c')
| -rw-r--r-- | sound/drivers/vx/vx_pcm.c | 1312 |
1 files changed, 1312 insertions, 0 deletions
diff --git a/sound/drivers/vx/vx_pcm.c b/sound/drivers/vx/vx_pcm.c new file mode 100644 index 000000000000..98587176b327 --- /dev/null +++ b/sound/drivers/vx/vx_pcm.c @@ -0,0 +1,1312 @@ +/* + * Driver for Digigram VX soundcards + * + * PCM part + * + * Copyright (c) 2002,2003 by Takashi Iwai <tiwai@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * + * STRATEGY + * for playback, we send series of "chunks", which size is equal with the + * IBL size, typically 126 samples. at each end of chunk, the end-of-buffer + * interrupt is notified, and the interrupt handler will feed the next chunk. + * + * the current position is calculated from the sample count RMH. + * pipe->transferred is the counter of data which has been already transferred. + * if this counter reaches to the period size, snd_pcm_period_elapsed() will + * be issued. + * + * for capture, the situation is much easier. + * to get a low latency response, we'll check the capture streams at each + * interrupt (capture stream has no EOB notification). if the pending + * data is accumulated to the period size, snd_pcm_period_elapsed() is + * called and the pointer is updated. + * + * the current point of read buffer is kept in pipe->hw_ptr. note that + * this is in bytes. + * + * + * TODO + * - linked trigger for full-duplex mode. + * - scheduled action on the stream. + */ + +#include <sound/driver.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <linux/delay.h> +#include <sound/core.h> +#include <sound/asoundef.h> +#include <sound/pcm.h> +#include <sound/vx_core.h> +#include "vx_cmd.h" + + +/* + * we use a vmalloc'ed (sg-)buffer + */ + +/* get the physical page pointer on the given offset */ +static struct page *snd_pcm_get_vmalloc_page(snd_pcm_substream_t *subs, unsigned long offset) +{ + void *pageptr = subs->runtime->dma_area + offset; + return vmalloc_to_page(pageptr); +} + +/* + * allocate a buffer via vmalloc_32(). + * called from hw_params + * NOTE: this may be called not only once per pcm open! + */ +static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t *subs, size_t size) +{ + snd_pcm_runtime_t *runtime = subs->runtime; + if (runtime->dma_area) { + /* already allocated */ + if (runtime->dma_bytes >= size) + return 0; /* already enough large */ + vfree_nocheck(runtime->dma_area); /* bypass the memory wrapper */ + } + runtime->dma_area = vmalloc_32(size); + if (! runtime->dma_area) + return -ENOMEM; + memset(runtime->dma_area, 0, size); + runtime->dma_bytes = size; + return 1; /* changed */ +} + +/* + * free the buffer. + * called from hw_free callback + * NOTE: this may be called not only once per pcm open! + */ +static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t *subs) +{ + snd_pcm_runtime_t *runtime = subs->runtime; + if (runtime->dma_area) { + vfree_nocheck(runtime->dma_area); /* bypass the memory wrapper */ + runtime->dma_area = NULL; + } + return 0; +} + + +/* + * read three pending pcm bytes via inb() + */ +static void vx_pcm_read_per_bytes(vx_core_t *chip, snd_pcm_runtime_t *runtime, vx_pipe_t *pipe) +{ + int offset = pipe->hw_ptr; + unsigned char *buf = (unsigned char *)(runtime->dma_area + offset); + *buf++ = vx_inb(chip, RXH); + if (++offset >= pipe->buffer_bytes) { + offset = 0; + buf = (unsigned char *)runtime->dma_area; + } + *buf++ = vx_inb(chip, RXM); + if (++offset >= pipe->buffer_bytes) { + offset = 0; + buf = (unsigned char *)runtime->dma_area; + } + *buf++ = vx_inb(chip, RXL); + if (++offset >= pipe->buffer_bytes) { + offset = 0; + buf = (unsigned char *)runtime->dma_area; + } + pipe->hw_ptr = offset; +} + +/* + * vx_set_pcx_time - convert from the PC time to the RMH status time. + * @pc_time: the pointer for the PC-time to set + * @dsp_time: the pointer for RMH status time array + */ +static void vx_set_pcx_time(vx_core_t *chip, pcx_time_t *pc_time, unsigned int *dsp_time) +{ + dsp_time[0] = (unsigned int)((*pc_time) >> 24) & PCX_TIME_HI_MASK; + dsp_time[1] = (unsigned int)(*pc_time) & MASK_DSP_WORD; +} + +/* + * vx_set_differed_time - set the differed time if specified + * @rmh: the rmh record to modify + * @pipe: the pipe to be checked + * + * if the pipe is programmed with the differed time, set the DSP time + * on the rmh and changes its command length. + * + * returns the increase of the command length. + */ +static int vx_set_differed_time(vx_core_t *chip, struct vx_rmh *rmh, vx_pipe_t *pipe) +{ + /* Update The length added to the RMH command by the timestamp */ + if (! (pipe->differed_type & DC_DIFFERED_DELAY)) + return 0; + + /* Set the T bit */ + rmh->Cmd[0] |= DSP_DIFFERED_COMMAND_MASK; + + /* Time stamp is the 1st following parameter */ + vx_set_pcx_time(chip, &pipe->pcx_time, &rmh->Cmd[1]); + + /* Add the flags to a notified differed command */ + if (pipe->differed_type & DC_NOTIFY_DELAY) + rmh->Cmd[1] |= NOTIFY_MASK_TIME_HIGH ; + + /* Add the flags to a multiple differed command */ + if (pipe->differed_type & DC_MULTIPLE_DELAY) + rmh->Cmd[1] |= MULTIPLE_MASK_TIME_HIGH; + + /* Add the flags to a stream-time differed command */ + if (pipe->differed_type & DC_STREAM_TIME_DELAY) + rmh->Cmd[1] |= STREAM_MASK_TIME_HIGH; + + rmh->LgCmd += 2; + return 2; +} + +/* + * vx_set_stream_format - send the stream format command + * @pipe: the affected pipe + * @data: format bitmask + */ +static int vx_set_stream_format(vx_core_t *chip, vx_pipe_t *pipe, unsigned int data) +{ + struct vx_rmh rmh; + + vx_init_rmh(&rmh, pipe->is_capture ? + CMD_FORMAT_STREAM_IN : CMD_FORMAT_STREAM_OUT); + rmh.Cmd[0] |= pipe->number << FIELD_SIZE; + + /* Command might be longer since we may have to add a timestamp */ + vx_set_differed_time(chip, &rmh, pipe); + + rmh.Cmd[rmh.LgCmd] = (data & 0xFFFFFF00) >> 8; + rmh.Cmd[rmh.LgCmd + 1] = (data & 0xFF) << 16 /*| (datal & 0xFFFF00) >> 8*/; + rmh.LgCmd += 2; + + return vx_send_msg(chip, &rmh); +} + + +/* + * vx_set_format - set the format of a pipe + * @pipe: the affected pipe + * @runtime: pcm runtime instance to be referred + * + * returns 0 if successful, or a negative error code. + */ +static int vx_set_format(vx_core_t *chip, vx_pipe_t *pipe, + snd_pcm_runtime_t *runtime) +{ + unsigned int header = HEADER_FMT_BASE; + + if (runtime->channels == 1) + header |= HEADER_FMT_MONO; + if (snd_pcm_format_little_endian(runtime->format)) + header |= HEADER_FMT_INTEL; + if (runtime->rate < 32000 && runtime->rate > 11025) + header |= HEADER_FMT_UPTO32; + else if (runtime->rate <= 11025) + header |= HEADER_FMT_UPTO11; + + switch (snd_pcm_format_physical_width(runtime->format)) { + // case 8: break; + case 16: header |= HEADER_FMT_16BITS; break; + case 24: header |= HEADER_FMT_24BITS; break; + default : + snd_BUG(); + return -EINVAL; + }; + + return vx_set_stream_format(chip, pipe, header); +} + +/* + * set / query the IBL size + */ +static int vx_set_ibl(vx_core_t *chip, struct vx_ibl_info *info) +{ + int err; + struct vx_rmh rmh; + + vx_init_rmh(&rmh, CMD_IBL); + rmh.Cmd[0] |= info->size & 0x03ffff; + err = vx_send_msg(chip, &rmh); + if (err < 0) + return err; + info->size = rmh.Stat[0]; + info->max_size = rmh.Stat[1]; + info->min_size = rmh.Stat[2]; + info->granularity = rmh.Stat[3]; + snd_printdd(KERN_DEBUG "vx_set_ibl: size = %d, max = %d, min = %d, gran = %d\n", + info->size, info->max_size, info->min_size, info->granularity); + return 0; +} + + +/* + * vx_get_pipe_state - get the state of a pipe + * @pipe: the pipe to be checked + * @state: the pointer for the returned state + * + * checks the state of a given pipe, and stores the state (1 = running, + * 0 = paused) on the given pointer. + * + * called from trigger callback only + */ +static int vx_get_pipe_state(vx_core_t *chip, vx_pipe_t *pipe, int *state) +{ + int err; + struct vx_rmh rmh; + + vx_init_rmh(&rmh, CMD_PIPE_STATE); + vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0); + err = vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ + if (! err) + *state = (rmh.Stat[0] & (1 << pipe->number)) ? 1 : 0; + return err; +} + + +/* + * vx_query_hbuffer_size - query available h-buffer size in bytes + * @pipe: the pipe to be checked + * + * return the available size on h-buffer in bytes, + * or a negative error code. + * + * NOTE: calling this function always switches to the stream mode. + * you'll need to disconnect the host to get back to the + * normal mode. + */ +static int vx_query_hbuffer_size(vx_core_t *chip, vx_pipe_t *pipe) +{ + int result; + struct vx_rmh rmh; + + vx_init_rmh(&rmh, CMD_SIZE_HBUFFER); + vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0); + if (pipe->is_capture) + rmh.Cmd[0] |= 0x00000001; + result = vx_send_msg(chip, &rmh); + if (! result) + result = rmh.Stat[0] & 0xffff; + return result; +} + + +/* + * vx_pipe_can_start - query whether a pipe is ready for start + * @pipe: the pipe to be checked + * + * return 1 if ready, 0 if not ready, and negative value on error. + * + * called from trigger callback only + */ +static int vx_pipe_can_start(vx_core_t *chip, vx_pipe_t *pipe) +{ + int err; + struct vx_rmh rmh; + + vx_init_rmh(&rmh, CMD_CAN_START_PIPE); + vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0); + rmh.Cmd[0] |= 1; + + err = vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ + if (! err) { + if (rmh.Stat[0]) + err = 1; + } + return err; +} + +/* + * vx_conf_pipe - tell the pipe to stand by and wait for IRQA. + * @pipe: the pipe to be configured + */ +static int vx_conf_pipe(vx_core_t *chip, vx_pipe_t *pipe) +{ + struct vx_rmh rmh; + + vx_init_rmh(&rmh, CMD_CONF_PIPE); + if (pipe->is_capture) + rmh.Cmd[0] |= COMMAND_RECORD_MASK; + rmh.Cmd[1] = 1 << pipe->number; + return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ +} + +/* + * vx_send_irqa - trigger IRQA + */ +static int vx_send_irqa(vx_core_t *chip) +{ + struct vx_rmh rmh; + + vx_init_rmh(&rmh, CMD_SEND_IRQA); + return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ +} + + +#define MAX_WAIT_FOR_DSP 250 +/* + * vx boards do not support inter-card sync, besides + * only 126 samples require to be prepared before a pipe can start + */ +#define CAN_START_DELAY 2 /* wait 2ms only before asking if the pipe is ready*/ +#define WAIT_STATE_DELAY 2 /* wait 2ms after irqA was requested and check if the pipe state toggled*/ + +/* + * vx_toggle_pipe - start / pause a pipe + * @pipe: the pipe to be triggered + * @state: start = 1, pause = 0 + * + * called from trigger callback only + * + */ +static int vx_toggle_pipe(vx_core_t *chip, vx_pipe_t *pipe, int state) +{ + int err, i, cur_state; + + /* Check the pipe is not already in the requested state */ + if (vx_get_pipe_state(chip, pipe, &cur_state) < 0) + return -EBADFD; + if (state == cur_state) + return 0; + + /* If a start is requested, ask the DSP to get prepared + * and wait for a positive acknowledge (when there are + * enough sound buffer for this pipe) + */ + if (state) { + for (i = 0 ; i < MAX_WAIT_FOR_DSP; i++) { + err = vx_pipe_can_start(chip, pipe); + if (err > 0) + break; + /* Wait for a few, before asking again + * to avoid flooding the DSP with our requests + */ + mdelay(1); + } + } + + if ((err = vx_conf_pipe(chip, pipe)) < 0) + return err; + + if ((err = vx_send_irqa(chip)) < 0) + return err; + + /* If it completes successfully, wait for the pipes + * reaching the expected state before returning + * Check one pipe only (since they are synchronous) + */ + for (i = 0; i < MAX_WAIT_FOR_DSP; i++) { + err = vx_get_pipe_state(chip, pipe, &cur_state); + if (err < 0 || cur_state == state) + break; + err = -EIO; + mdelay(1); + } + return err < 0 ? -EIO : 0; +} + + +/* + * vx_stop_pipe - stop a pipe + * @pipe: the pipe to be stopped + * + * called from trigger callback only + */ +static int vx_stop_pipe(vx_core_t *chip, vx_pipe_t *pipe) +{ + struct vx_rmh rmh; + vx_init_rmh(&rmh, CMD_STOP_PIPE); + vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0); + return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ +} + + +/* + * vx_alloc_pipe - allocate a pipe and initialize the pipe instance + * @capture: 0 = playback, 1 = capture operation + * @audioid: the audio id to be assigned + * @num_audio: number of audio channels + * @pipep: the returned pipe instance + * + * return 0 on success, or a negative error code. + */ +static int vx_alloc_pipe(vx_core_t *chip, int capture, + int audioid, int num_audio, + vx_pipe_t **pipep) +{ + int err; + vx_pipe_t *pipe; + struct vx_rmh rmh; + int data_mode; + + *pipep = NULL; + vx_init_rmh(&rmh, CMD_RES_PIPE); + vx_set_pipe_cmd_params(&rmh, capture, audioid, num_audio); +#if 0 // NYI + if (underrun_skip_sound) + rmh.Cmd[0] |= BIT_SKIP_SOUND; +#endif // NYI + data_mode = (chip->uer_bits & IEC958_AES0_NONAUDIO) != 0; + if (! capture && data_mode) + rmh.Cmd[0] |= BIT_DATA_MODE; + err = vx_send_msg(chip, &rmh); + if (err < 0) + return err; + + /* initialize the pipe record */ + pipe = kcalloc(1, sizeof(*pipe), GFP_KERNEL); + if (! pipe) { + /* release the pipe */ + vx_init_rmh(&rmh, CMD_FREE_PIPE); + vx_set_pipe_cmd_params(&rmh, capture, audioid, 0); + vx_send_msg(chip, &rmh); + return -ENOMEM; + } + + /* the pipe index should be identical with the audio index */ + pipe->number = audioid; + pipe->is_capture = capture; + pipe->channels = num_audio; + pipe->differed_type = 0; + pipe->pcx_time = 0; + pipe->data_mode = data_mode; + *pipep = pipe; + + return 0; +} + + +/* + * vx_free_pipe - release a pipe + * @pipe: pipe to be released + */ +static int vx_free_pipe(vx_core_t *chip, vx_pipe_t *pipe) +{ + struct vx_rmh rmh; + + vx_init_rmh(&rmh, CMD_FREE_PIPE); + vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0); + vx_send_msg(chip, &rmh); + + kfree(pipe); + return 0; +} + + +/* + * vx_start_stream - start the stream + * + * called from trigger callback only + */ +static int vx_start_stream(vx_core_t *chip, vx_pipe_t *pipe) +{ + struct vx_rmh rmh; + + vx_init_rmh(&rmh, CMD_START_ONE_STREAM); + vx_set_stream_cmd_params(&rmh, pipe->is_capture, pipe->number); + vx_set_differed_time(chip, &rmh, pipe); + return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ +} + + +/* + * vx_stop_stream - stop the stream + * + * called from trigger callback only + */ +static int vx_stop_stream(vx_core_t *chip, vx_pipe_t *pipe) +{ + struct vx_rmh rmh; + + vx_init_rmh(&rmh, CMD_STOP_STREAM); + vx_set_stream_cmd_params(&rmh, pipe->is_capture, pipe->number); + return vx_send_msg_nolock(chip, &rmh); /* no lock needed for trigger */ +} + + +/* + * playback hw information + */ + +static snd_pcm_hardware_t vx_pcm_playback_hw = { + .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_RESUME), + .formats = /*SNDRV_PCM_FMTBIT_U8 |*/ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE, + .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000, + .rate_min = 5000, + .rate_max = 48000, + .channels_min = 1, + .channels_max = 2, + .buffer_bytes_max = (128*1024), + .period_bytes_min = 126, + .period_bytes_max = (128*1024), + .periods_min = 2, + .periods_max = VX_MAX_PERIODS, + .fifo_size = 126, +}; + + +static void vx_pcm_delayed_start(unsigned long arg); + +/* + * vx_pcm_playback_open - open callback for playback + */ +static int vx_pcm_playback_open(snd_pcm_substream_t *subs) +{ + snd_pcm_runtime_t *runtime = subs->runtime; + vx_core_t *chip = snd_pcm_substream_chip(subs); + vx_pipe_t *pipe = NULL; + unsigned int audio; + int err; + + if (chip->chip_status & VX_STAT_IS_STALE) + return -EBUSY; + + audio = subs->pcm->device * 2; + snd_assert(audio < chip->audio_outs, return -EINVAL); + + /* playback pipe may have been already allocated for monitoring */ + pipe = chip->playback_pipes[audio]; + if (! pipe) { + /* not allocated yet */ + err = vx_alloc_pipe(chip, 0, audio, 2, &pipe); /* stereo playback */ + if (err < 0) + return err; + chip->playback_pipes[audio] = pipe; + } + /* open for playback */ + pipe->references++; + + pipe->substream = subs; + tasklet_init(&pipe->start_tq, vx_pcm_delayed_start, (unsigned long)subs); + chip->playback_pipes[audio] = pipe; + + runtime->hw = vx_pcm_playback_hw; + runtime->hw.period_bytes_min = chip->ibl.size; + runtime->private_data = pipe; + + /* align to 4 bytes (otherwise will be problematic when 24bit is used) */ + snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4); + snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4); + + return 0; +} + +/* + * vx_pcm_playback_close - close callback for playback + */ +static int vx_pcm_playback_close(snd_pcm_substream_t *subs) +{ + vx_core_t *chip = snd_pcm_substream_chip(subs); + vx_pipe_t *pipe; + + if (! subs->runtime->private_data) + return -EINVAL; + + pipe = subs->runtime->private_data; + + if (--pipe->references == 0) { + chip->playback_pipes[pipe->number] = NULL; + vx_free_pipe(chip, pipe); + } + + return 0; + +} + + +/* + * vx_notify_end_of_buffer - send "end-of-buffer" notifier at the given pipe + * @pipe: the pipe to notify + * + * NB: call with a certain lock. + */ +static int vx_notify_end_of_buffer(vx_core_t *chip, vx_pipe_t *pipe) +{ + int err; + struct vx_rmh rmh; /* use a temporary rmh here */ + + /* Toggle Dsp Host Interface into Message mode */ + vx_send_rih_nolock(chip, IRQ_PAUSE_START_CONNECT); + vx_init_rmh(&rmh, CMD_NOTIFY_END_OF_BUFFER); + vx_set_stream_cmd_params(&rmh, 0, pipe->number); + err = vx_send_msg_nolock(chip, &rmh); + if (err < 0) + return err; + /* Toggle Dsp Host Interface back to sound transfer mode */ + vx_send_rih_nolock(chip, IRQ_PAUSE_START_CONNECT); + return 0; +} + +/* + * vx_pcm_playback_transfer_chunk - transfer a single chunk + * @subs: substream + * @pipe: the pipe to transfer + * @size: chunk size in bytes + * + * transfer a single buffer chunk. EOB notificaton is added after that. + * called from the interrupt handler, too. + * + * return 0 if ok. + */ +static int vx_pcm_playback_transfer_chunk(vx_core_t *chip, snd_pcm_runtime_t *runtime, vx_pipe_t *pipe, int size) +{ + int space, err = 0; + + space = vx_query_hbuffer_size(chip, pipe); + if (space < 0) { + /* disconnect the host, SIZE_HBUF command always switches to the stream mode */ + vx_send_rih(chip, IRQ_CONNECT_STREAM_NEXT); + snd_printd("error hbuffer\n"); + return space; + } + if (space < size) { + vx_send_rih(chip, IRQ_CONNECT_STREAM_NEXT); + snd_printd("no enough hbuffer space %d\n", space); + return -EIO; /* XRUN */ + } + + /* we don't need irqsave here, because this function + * is called from either trigger callback or irq handler + */ + spin_lock(&chip->lock); + vx_pseudo_dma_write(chip, runtime, pipe, size); + err = vx_notify_end_of_buffer(chip, pipe); + /* disconnect the host, SIZE_HBUF command always switches to the stream mode */ + vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT); + spin_unlock(&chip->lock); + return err; +} + +/* + * update the position of the given pipe. + * pipe->position is updated and wrapped within the buffer size. + * pipe->transferred is updated, too, but the size is not wrapped, + * so that the caller can check the total transferred size later + * (to call snd_pcm_period_elapsed). + */ +static int vx_update_pipe_position(vx_core_t *chip, snd_pcm_runtime_t *runtime, vx_pipe_t *pipe) +{ + struct vx_rmh rmh; + int err, update; + u64 count; + + vx_init_rmh(&rmh, CMD_STREAM_SAMPLE_COUNT); + vx_set_pipe_cmd_params(&rmh, pipe->is_capture, pipe->number, 0); + err = vx_send_msg(chip, &rmh); + if (err < 0) + return err; + + count = ((u64)(rmh.Stat[0] & 0xfffff) << 24) | (u64)rmh.Stat[1]; + update = (int)(count - pipe->cur_count); + pipe->cur_count = count; + pipe->position += update; + if (pipe->position >= (int)runtime->buffer_size) + pipe->position %= runtime->buffer_size; + pipe->transferred += update; + return 0; +} + +/* + * transfer the pending playback buffer data to DSP + * called from interrupt handler + */ +static void vx_pcm_playback_transfer(vx_core_t *chip, snd_pcm_substream_t *subs, vx_pipe_t *pipe, int nchunks) +{ + int i, err; + snd_pcm_runtime_t *runtime = subs->runtime; + + if (! pipe->prepared || (chip->chip_status & VX_STAT_IS_STALE)) + return; + for (i = 0; i < nchunks; i++) { + if ((err = vx_pcm_playback_transfer_chunk(chip, runtime, pipe, + chip->ibl.size)) < 0) + return; + } +} + +/* + * update the playback position and call snd_pcm_period_elapsed() if necessary + * called from interrupt handler + */ +static void vx_pcm_playback_update(vx_core_t *chip, snd_pcm_substream_t *subs, vx_pipe_t *pipe) +{ + int err; + snd_pcm_runtime_t *runtime = subs->runtime; + + if (pipe->running && ! (chip->chip_status & VX_STAT_IS_STALE)) { + if ((err = vx_update_pipe_position(chip, runtime, pipe)) < 0) + return; + if (pipe->transferred >= (int)runtime->period_size) { + pipe->transferred %= runtime->period_size; + snd_pcm_period_elapsed(subs); + } + } +} + +/* + * start the stream and pipe. + * this function is called from tasklet, which is invoked by the trigger + * START callback. + */ +static void vx_pcm_delayed_start(unsigned long arg) +{ + snd_pcm_substream_t *subs = (snd_pcm_substream_t *)arg; + vx_core_t *chip = subs->pcm->private_data; + vx_pipe_t *pipe = subs->runtime->private_data; + int err; + + /* printk( KERN_DEBUG "DDDD tasklet delayed start jiffies = %ld\n", jiffies);*/ + + if ((err = vx_start_stream(chip, pipe)) < 0) { + snd_printk(KERN_ERR "vx: cannot start stream\n"); + return; + } + if ((err = vx_toggle_pipe(chip, pipe, 1)) < 0) { + snd_printk(KERN_ERR "vx: cannot start pipe\n"); + return; + } + /* printk( KERN_DEBUG "dddd tasklet delayed start jiffies = %ld \n", jiffies);*/ +} + +/* + * vx_pcm_playback_trigger - trigger callback for playback + */ +static int vx_pcm_trigger(snd_pcm_substream_t *subs, int cmd) +{ + vx_core_t *chip = snd_pcm_substream_chip(subs); + vx_pipe_t *pipe = subs->runtime->private_data; + int err; + + if (chip->chip_status & VX_STAT_IS_STALE) + return -EBUSY; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + if (! pipe->is_capture) + vx_pcm_playback_transfer(chip, subs, pipe, 2); + /* FIXME: + * we trigger the pipe using tasklet, so that the interrupts are + * issued surely after the trigger is completed. + */ + tasklet_hi_schedule(&pipe->start_tq); + chip->pcm_running++; + pipe->running = 1; + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + vx_toggle_pipe(chip, pipe, 0); + vx_stop_pipe(chip, pipe); + vx_stop_stream(chip, pipe); + chip->pcm_running--; + pipe->running = 0; + break; + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + if ((err = vx_toggle_pipe(chip, pipe, 0)) < 0) + return err; + break; + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + if ((err = vx_toggle_pipe(chip, pipe, 1)) < 0) + return err; + break; + default: + return -EINVAL; + } + return 0; +} + +/* + * vx_pcm_playback_pointer - pointer callback for playback + */ +static snd_pcm_uframes_t vx_pcm_playback_pointer(snd_pcm_substream_t *subs) +{ + snd_pcm_runtime_t *runtime = subs->runtime; + vx_pipe_t *pipe = runtime->private_data; + return pipe->position; +} + +/* + * vx_pcm_hw_params - hw_params callback for playback and capture + */ +static int vx_pcm_hw_params(snd_pcm_substream_t *subs, + snd_pcm_hw_params_t *hw_params) +{ + return snd_pcm_alloc_vmalloc_buffer(subs, params_buffer_bytes(hw_params)); +} + +/* + * vx_pcm_hw_free - hw_free callback for playback and capture + */ +static int vx_pcm_hw_free(snd_pcm_substream_t *subs) +{ + return snd_pcm_free_vmalloc_buffer(subs); +} + +/* + * vx_pcm_prepare - prepare callback for playback and capture + */ +static int vx_pcm_prepare(snd_pcm_substream_t *subs) +{ + vx_core_t *chip = snd_pcm_substream_chip(subs); + snd_pcm_runtime_t *runtime = subs->runtime; + vx_pipe_t *pipe = runtime->private_data; + int err, data_mode; + // int max_size, nchunks; + + if (chip->chip_status & VX_STAT_IS_STALE) + return -EBUSY; + + data_mode = (chip->uer_bits & IEC958_AES0_NONAUDIO) != 0; + if (data_mode != pipe->data_mode && ! pipe->is_capture) { + /* IEC958 status (raw-mode) was changed */ + /* we reopen the pipe */ + struct vx_rmh rmh; + snd_printdd(KERN_DEBUG "reopen the pipe with data_mode = %d\n", data_mode); + vx_init_rmh(&rmh, CMD_FREE_PIPE); + vx_set_pipe_cmd_params(&rmh, 0, pipe->number, 0); + if ((err = vx_send_msg(chip, &rmh)) < 0) + return err; + vx_init_rmh(&rmh, CMD_RES_PIPE); + vx_set_pipe_cmd_params(&rmh, 0, pipe->number, pipe->channels); + if (data_mode) + rmh.Cmd[0] |= BIT_DATA_MODE; + if ((err = vx_send_msg(chip, &rmh)) < 0) + return err; + pipe->data_mode = data_mode; + } + + if (chip->pcm_running && chip->freq != runtime->rate) { + snd_printk(KERN_ERR "vx: cannot set different clock %d from the current %d\n", runtime->rate, chip->freq); + return -EINVAL; + } + vx_set_clock(chip, runtime->rate); + + if ((err = vx_set_format(chip, pipe, runtime)) < 0) + return err; + + if (vx_is_pcmcia(chip)) { + pipe->align = 2; /* 16bit word */ + } else { + pipe->align = 4; /* 32bit word */ + } + + pipe->buffer_bytes = frames_to_bytes(runtime, runtime->buffer_size); + pipe->period_bytes = frames_to_bytes(runtime, runtime->period_size); + pipe->hw_ptr = 0; + + /* set the timestamp */ + vx_update_pipe_position(chip, runtime, pipe); + /* clear again */ + pipe->transferred = 0; + pipe->position = 0; + + pipe->prepared = 1; + + return 0; +} + + +/* + * operators for PCM playback + */ +static snd_pcm_ops_t vx_pcm_playback_ops = { + .open = vx_pcm_playback_open, + .close = vx_pcm_playback_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = vx_pcm_hw_params, + .hw_free = vx_pcm_hw_free, + .prepare = vx_pcm_prepare, + .trigger = vx_pcm_trigger, + .pointer = vx_pcm_playback_pointer, + .page = snd_pcm_get_vmalloc_page, +}; + + +/* + * playback hw information + */ + +static snd_pcm_hardware_t vx_pcm_capture_hw = { + .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_RESUME), + .formats = /*SNDRV_PCM_FMTBIT_U8 |*/ SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE, + .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000, + .rate_min = 5000, + .rate_max = 48000, + .channels_min = 1, + .channels_max = 2, + .buffer_bytes_max = (128*1024), + .period_bytes_min = 126, + .period_bytes_max = (128*1024), + .periods_min = 2, + .periods_max = VX_MAX_PERIODS, + .fifo_size = 126, +}; + + +/* + * vx_pcm_capture_open - open callback for capture + */ +static int vx_pcm_capture_open(snd_pcm_substream_t *subs) +{ + snd_pcm_runtime_t *runtime = subs->runtime; + vx_core_t *chip = snd_pcm_substream_chip(subs); + vx_pipe_t *pipe; + vx_pipe_t *pipe_out_monitoring = NULL; + unsigned int audio; + int err; + + if (chip->chip_status & VX_STAT_IS_STALE) + return -EBUSY; + + audio = subs->pcm->device * 2; + snd_assert(audio < chip->audio_ins, return -EINVAL); + err = vx_alloc_pipe(chip, 1, audio, 2, &pipe); + if (err < 0) + return err; + pipe->substream = subs; + tasklet_init(&pipe->start_tq, vx_pcm_delayed_start, (unsigned long)subs); + chip->capture_pipes[audio] = pipe; + + /* check if monitoring is needed */ + if (chip->audio_monitor_active[audio]) { + pipe_out_monitoring = chip->playback_pipes[audio]; + if (! pipe_out_monitoring) { + /* allocate a pipe */ + err = vx_alloc_pipe(chip, 0, audio, 2, &pipe_out_monitoring); + if (err < 0) + return err; + chip->playback_pipes[audio] = pipe_out_monitoring; + } + pipe_out_monitoring->references++; + /* + if an output pipe is available, it's audios still may need to be + unmuted. hence we'll have to call a mixer entry point. + */ + vx_set_monitor_level(chip, audio, chip->audio_monitor[audio], chip->audio_monitor_active[audio]); + /* assuming stereo */ + vx_set_monitor_level(chip, audio+1, chip->audio_monitor[audio+1], chip->audio_monitor_active[audio+1]); + } + + pipe->monitoring_pipe = pipe_out_monitoring; /* default value NULL */ + + runtime->hw = vx_pcm_capture_hw; + runtime->hw.period_bytes_min = chip->ibl.size; + runtime->private_data = pipe; + + /* align to 4 bytes (otherwise will be problematic when 24bit is used) */ + snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4); + snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 4); + + return 0; +} + +/* + * vx_pcm_capture_close - close callback for capture + */ +static int vx_pcm_capture_close(snd_pcm_substream_t *subs) +{ + vx_core_t *chip = snd_pcm_substream_chip(subs); + vx_pipe_t *pipe; + vx_pipe_t *pipe_out_monitoring; + + if (! subs->runtime->private_data) + return -EINVAL; + pipe = subs->runtime->private_data; + chip->capture_pipes[pipe->number] = NULL; + + pipe_out_monitoring = pipe->monitoring_pipe; + + /* + if an output pipe is attached to this input, + check if it needs to be released. + */ + if (pipe_out_monitoring) { + if (--pipe_out_monitoring->references == 0) { + vx_free_pipe(chip, pipe_out_monitoring); + chip->playback_pipes[pipe->number] = NULL; + pipe->monitoring_pipe = NULL; + } + } + + vx_free_pipe(chip, pipe); + return 0; +} + + + +#define DMA_READ_ALIGN 6 /* hardware alignment for read */ + +/* + * vx_pcm_capture_update - update the capture buffer + */ +static void vx_pcm_capture_update(vx_core_t *chip, snd_pcm_substream_t *subs, vx_pipe_t *pipe) +{ + int size, space, count; + snd_pcm_runtime_t *runtime = subs->runtime; + + if (! pipe->prepared || (chip->chip_status & VX_STAT_IS_STALE)) + return; + + size = runtime->buffer_size - snd_pcm_capture_avail(runtime); + if (! size) + return; + size = frames_to_bytes(runtime, size); + space = vx_query_hbuffer_size(chip, pipe); + if (space < 0) + goto _error; + if (size > space) + size = space; + size = (size / 3) * 3; /* align to 3 bytes */ + if (size < DMA_READ_ALIGN) + goto _error; + + /* keep the last 6 bytes, they will be read after disconnection */ + count = size - DMA_READ_ALIGN; + /* read bytes until the current pointer reaches to the aligned position + * for word-transfer + */ + while (count > 0) { + if ((pipe->hw_ptr % pipe->align) == 0) + break; + if (vx_wait_for_rx_full(chip) < 0) + goto _error; + vx_pcm_read_per_bytes(chip, runtime, pipe); + count -= 3; + } + if (count > 0) { + /* ok, let's accelerate! */ + int align = pipe->align * 3; + space = (count / align) * align; + vx_pseudo_dma_read(chip, runtime, pipe, space); + count -= space; + } + /* read the rest of bytes */ + while (count > 0) { + if (vx_wait_for_rx_full(chip) < 0) + goto _error; + vx_pcm_read_per_bytes(chip, runtime, pipe); + count -= 3; + } + /* disconnect the host, SIZE_HBUF command always switches to the stream mode */ + vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT); + /* read the last pending 6 bytes */ + count = DMA_READ_ALIGN; + while (count > 0) { + vx_pcm_read_per_bytes(chip, runtime, pipe); + count -= 3; + } + /* update the position */ + pipe->transferred += size; + if (pipe->transferred >= pipe->period_bytes) { + pipe->transferred %= pipe->period_bytes; + snd_pcm_period_elapsed(subs); + } + return; + + _error: + /* disconnect the host, SIZE_HBUF command always switches to the stream mode */ + vx_send_rih_nolock(chip, IRQ_CONNECT_STREAM_NEXT); + return; +} + +/* + * vx_pcm_capture_pointer - pointer callback for capture + */ +static snd_pcm_uframes_t vx_pcm_capture_pointer(snd_pcm_substream_t *subs) +{ + snd_pcm_runtime_t *runtime = subs->runtime; + vx_pipe_t *pipe = runtime->private_data; + return bytes_to_frames(runtime, pipe->hw_ptr); +} + +/* + * operators for PCM capture + */ +static snd_pcm_ops_t vx_pcm_capture_ops = { + .open = vx_pcm_capture_open, + .close = vx_pcm_capture_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = vx_pcm_hw_params, + .hw_free = vx_pcm_hw_free, + .prepare = vx_pcm_prepare, + .trigger = vx_pcm_trigger, + .pointer = vx_pcm_capture_pointer, + .page = snd_pcm_get_vmalloc_page, +}; + + +/* + * interrupt handler for pcm streams + */ +void vx_pcm_update_intr(vx_core_t *chip, unsigned int events) +{ + unsigned int i; + vx_pipe_t *pipe; + +#define EVENT_MASK (END_OF_BUFFER_EVENTS_PENDING|ASYNC_EVENTS_PENDING) + + if (events & EVENT_MASK) { + vx_init_rmh(&chip->irq_rmh, CMD_ASYNC); + if (events & ASYNC_EVENTS_PENDING) + chip->irq_rmh.Cmd[0] |= 0x00000001; /* SEL_ASYNC_EVENTS */ + if (events & END_OF_BUFFER_EVENTS_PENDING) + chip->irq_rmh.Cmd[0] |= 0x00000002; /* SEL_END_OF_BUF_EVENTS */ + + if (vx_send_msg(chip, &chip->irq_rmh) < 0) { + snd_printdd(KERN_ERR "msg send error!!\n"); + return; + } + + i = 1; + while (i < chip->irq_rmh.LgStat) { + int p, buf, capture, eob; + p = chip->irq_rmh.Stat[i] & MASK_FIRST_FIELD; + capture = (chip->irq_rmh.Stat[i] & 0x400000) ? 1 : 0; + eob = (chip->irq_rmh.Stat[i] & 0x800000) ? 1 : 0; + i++; + if (events & ASYNC_EVENTS_PENDING) + i++; + buf = 1; /* force to transfer */ + if (events & END_OF_BUFFER_EVENTS_PENDING) { + if (eob) + buf = chip->irq_rmh.Stat[i]; + i++; + } + if (capture) + continue; + snd_assert(p >= 0 && (unsigned int)p < chip->audio_outs,); + pipe = chip->playback_pipes[p]; + if (pipe && pipe->substream) { + vx_pcm_playback_update(chip, pipe->substream, pipe); + vx_pcm_playback_transfer(chip, pipe->substream, pipe, buf); + } + } + } + + /* update the capture pcm pointers as frequently as possible */ + for (i = 0; i < chip->audio_ins; i++) { + pipe = chip->capture_pipes[i]; + if (pipe && pipe->substream) + vx_pcm_capture_update(chip, pipe->substream, pipe); + } +} + + +/* + * vx_init_audio_io - check the availabe audio i/o and allocate pipe arrays + */ +static int vx_init_audio_io(vx_core_t *chip) +{ + struct vx_rmh rmh; + int preferred; + + vx_init_rmh(&rmh, CMD_SUPPORTED); + if (vx_send_msg(chip, &rmh) < 0) { + snd_printk(KERN_ERR "vx: cannot get the supported audio data\n"); + return -ENXIO; + } + + chip->audio_outs = rmh.Stat[0] & MASK_FIRST_FIELD; + chip->audio_ins = (rmh.Stat[0] >> (FIELD_SIZE*2)) & MASK_FIRST_FIELD; + chip->audio_info = rmh.Stat[1]; + + /* allocate pipes */ + chip->playback_pipes = kmalloc(sizeof(vx_pipe_t *) * chip->audio_outs, GFP_KERNEL); + chip->capture_pipes = kmalloc(sizeof(vx_pipe_t *) * chip->audio_ins, GFP_KERNEL); + if (! chip->playback_pipes || ! chip->capture_pipes) + return -ENOMEM; + + memset(chip->playback_pipes, 0, sizeof(vx_pipe_t *) * chip->audio_outs); + memset(chip->capture_pipes, 0, sizeof(vx_pipe_t *) * chip->audio_ins); + + preferred = chip->ibl.size; + chip->ibl.size = 0; + vx_set_ibl(chip, &chip->ibl); /* query the info */ + if (preferred > 0) { + chip->ibl.size = ((preferred + chip->ibl.granularity - 1) / chip->ibl.granularity) * chip->ibl.granularity; + if (chip->ibl.size > chip->ibl.max_size) + chip->ibl.size = chip->ibl.max_size; + } else + chip->ibl.size = chip->ibl.min_size; /* set to the minimum */ + vx_set_ibl(chip, &chip->ibl); + + return 0; +} + + +/* + * free callback for pcm + */ +static void snd_vx_pcm_free(snd_pcm_t *pcm) +{ + vx_core_t *chip = pcm->private_data; + chip->pcm[pcm->device] = NULL; + if (chip->playback_pipes) { + kfree(chip->playback_pipes); + chip->playback_pipes = NULL; + } + if (chip->capture_pipes) { + kfree(chip->capture_pipes); + chip->capture_pipes = NULL; + } +} + +/* + * snd_vx_pcm_new - create and initialize a pcm + */ +int snd_vx_pcm_new(vx_core_t *chip) +{ + snd_pcm_t *pcm; + unsigned int i; + int err; + + if ((err = vx_init_audio_io(chip)) < 0) + return err; + + for (i = 0; i < chip->hw->num_codecs; i++) { + unsigned int outs, ins; + outs = chip->audio_outs > i * 2 ? 1 : 0; + ins = chip->audio_ins > i * 2 ? 1 : 0; + if (! outs && ! ins) + break; + err = snd_pcm_new(chip->card, "VX PCM", i, + outs, ins, &pcm); + if (err < 0) + return err; + if (outs) + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &vx_pcm_playback_ops); + if (ins) + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &vx_pcm_capture_ops); + + pcm->private_data = chip; + pcm->private_free = snd_vx_pcm_free; + pcm->info_flags = 0; + strcpy(pcm->name, chip->card->shortname); + chip->pcm[i] = pcm; + } + + return 0; +} |