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- /*
- * 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(struct snd_pcm_substream *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(struct snd_pcm_substream *subs, size_t size)
- {
- struct snd_pcm_runtime *runtime = subs->runtime;
- if (runtime->dma_area) {
- /* already allocated */
- if (runtime->dma_bytes >= size)
- return 0; /* already enough large */
- vfree(runtime->dma_area);
- }
- 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(struct snd_pcm_substream *subs)
- {
- struct snd_pcm_runtime *runtime = subs->runtime;
- vfree(runtime->dma_area);
- runtime->dma_area = NULL;
- return 0;
- }
- /*
- * read three pending pcm bytes via inb()
- */
- static void vx_pcm_read_per_bytes(struct vx_core *chip, struct snd_pcm_runtime *runtime,
- struct vx_pipe *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(struct vx_core *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(struct vx_core *chip, struct vx_rmh *rmh,
- struct vx_pipe *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(struct vx_core *chip, struct vx_pipe *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(struct vx_core *chip, struct vx_pipe *pipe,
- struct snd_pcm_runtime *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(struct vx_core *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(struct vx_core *chip, struct vx_pipe *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(struct vx_core *chip, struct vx_pipe *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(struct vx_core *chip, struct vx_pipe *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(struct vx_core *chip, struct vx_pipe *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(struct vx_core *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(struct vx_core *chip, struct vx_pipe *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(struct vx_core *chip, struct vx_pipe *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(struct vx_core *chip, int capture,
- int audioid, int num_audio,
- struct vx_pipe **pipep)
- {
- int err;
- struct vx_pipe *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 = kzalloc(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(struct vx_core *chip, struct vx_pipe *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(struct vx_core *chip, struct vx_pipe *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(struct vx_core *chip, struct vx_pipe *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 struct snd_pcm_hardware 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(struct snd_pcm_substream *subs)
- {
- struct snd_pcm_runtime *runtime = subs->runtime;
- struct vx_core *chip = snd_pcm_substream_chip(subs);
- struct vx_pipe *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(struct snd_pcm_substream *subs)
- {
- struct vx_core *chip = snd_pcm_substream_chip(subs);
- struct vx_pipe *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(struct vx_core *chip, struct vx_pipe *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(struct vx_core *chip,
- struct snd_pcm_runtime *runtime,
- struct vx_pipe *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(struct vx_core *chip,
- struct snd_pcm_runtime *runtime,
- struct vx_pipe *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(struct vx_core *chip,
- struct snd_pcm_substream *subs,
- struct vx_pipe *pipe, int nchunks)
- {
- int i, err;
- struct snd_pcm_runtime *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(struct vx_core *chip,
- struct snd_pcm_substream *subs,
- struct vx_pipe *pipe)
- {
- int err;
- struct snd_pcm_runtime *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)
- {
- struct snd_pcm_substream *subs = (struct snd_pcm_substream *)arg;
- struct vx_core *chip = subs->pcm->private_data;
- struct vx_pipe *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(struct snd_pcm_substream *subs, int cmd)
- {
- struct vx_core *chip = snd_pcm_substream_chip(subs);
- struct vx_pipe *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(struct snd_pcm_substream *subs)
- {
- struct snd_pcm_runtime *runtime = subs->runtime;
- struct vx_pipe *pipe = runtime->private_data;
- return pipe->position;
- }
- /*
- * vx_pcm_hw_params - hw_params callback for playback and capture
- */
- static int vx_pcm_hw_params(struct snd_pcm_substream *subs,
- struct snd_pcm_hw_params *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(struct snd_pcm_substream *subs)
- {
- return snd_pcm_free_vmalloc_buffer(subs);
- }
- /*
- * vx_pcm_prepare - prepare callback for playback and capture
- */
- static int vx_pcm_prepare(struct snd_pcm_substream *subs)
- {
- struct vx_core *chip = snd_pcm_substream_chip(subs);
- struct snd_pcm_runtime *runtime = subs->runtime;
- struct vx_pipe *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 struct snd_pcm_ops 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 struct snd_pcm_hardware 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(struct snd_pcm_substream *subs)
- {
- struct snd_pcm_runtime *runtime = subs->runtime;
- struct vx_core *chip = snd_pcm_substream_chip(subs);
- struct vx_pipe *pipe;
- struct vx_pipe *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(struct snd_pcm_substream *subs)
- {
- struct vx_core *chip = snd_pcm_substream_chip(subs);
- struct vx_pipe *pipe;
- struct vx_pipe *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(struct vx_core *chip, struct snd_pcm_substream *subs,
- struct vx_pipe *pipe)
- {
- int size, space, count;
- struct snd_pcm_runtime *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(struct snd_pcm_substream *subs)
- {
- struct snd_pcm_runtime *runtime = subs->runtime;
- struct vx_pipe *pipe = runtime->private_data;
- return bytes_to_frames(runtime, pipe->hw_ptr);
- }
- /*
- * operators for PCM capture
- */
- static struct snd_pcm_ops 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(struct vx_core *chip, unsigned int events)
- {
- unsigned int i;
- struct vx_pipe *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(struct vx_core *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 = kcalloc(chip->audio_outs, sizeof(struct vx_pipe *), GFP_KERNEL);
- if (!chip->playback_pipes)
- return -ENOMEM;
- chip->capture_pipes = kcalloc(chip->audio_ins, sizeof(struct vx_pipe *), GFP_KERNEL);
- if (!chip->capture_pipes) {
- kfree(chip->playback_pipes);
- return -ENOMEM;
- }
- 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(struct snd_pcm *pcm)
- {
- struct vx_core *chip = pcm->private_data;
- chip->pcm[pcm->device] = NULL;
- kfree(chip->playback_pipes);
- chip->playback_pipes = NULL;
- kfree(chip->capture_pipes);
- chip->capture_pipes = NULL;
- }
- /*
- * snd_vx_pcm_new - create and initialize a pcm
- */
- int snd_vx_pcm_new(struct vx_core *chip)
- {
- struct snd_pcm *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;
- }
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