diff options
Diffstat (limited to 'sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c')
| -rw-r--r-- | sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c b/sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c new file mode 100644 index 0000000..0a954dc --- /dev/null +++ b/sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c @@ -0,0 +1,361 @@ +/* + * Driver for Sound Core PDAudioCF soundcards + * + * PCM part + * + * Copyright (c) 2003 by Jaroslav Kysela <perex@suse.cz> + * + * 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 + */ + +#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 "pdaudiocf.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); +} + +/* + * hw_params callback + * 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) { + if (runtime->dma_bytes >= size) + return 0; /* already enough large */ + vfree_nocheck(runtime->dma_area); + } + runtime->dma_area = vmalloc_nocheck(size); + if (! runtime->dma_area) + return -ENOMEM; + runtime->dma_bytes = size; + return 0; +} + +/* + * 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); + runtime->dma_area = NULL; + } + return 0; +} + +/* + * clear the SRAM contents + */ +static int pdacf_pcm_clear_sram(pdacf_t *chip) +{ + int max_loop = 64 * 1024; + + while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) { + if (max_loop-- < 0) + return -EIO; + inw(chip->port + PDAUDIOCF_REG_MD); + } + return 0; +} + +/* + * pdacf_pcm_trigger - trigger callback for capture + */ +static int pdacf_pcm_trigger(snd_pcm_substream_t *subs, int cmd) +{ + pdacf_t *chip = snd_pcm_substream_chip(subs); + snd_pcm_runtime_t *runtime = subs->runtime; + int inc, ret = 0, rate; + unsigned short mask, val, tmp; + + if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE) + return -EBUSY; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + chip->pcm_hwptr = 0; + chip->pcm_tdone = 0; + /* fall thru */ + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + case SNDRV_PCM_TRIGGER_RESUME: + mask = 0; + val = PDAUDIOCF_RECORD; + inc = 1; + rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + case SNDRV_PCM_TRIGGER_SUSPEND: + mask = PDAUDIOCF_RECORD; + val = 0; + inc = -1; + rate = 0; + break; + default: + return -EINVAL; + } + spin_lock(&chip->reg_lock); + chip->pcm_running += inc; + tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR); + if (chip->pcm_running) { + if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) { + chip->pcm_running -= inc; + ret = -EIO; + goto __end; + } + } + tmp &= ~mask; + tmp |= val; + pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp); + __end: + spin_unlock(&chip->reg_lock); + snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE); + return ret; +} + +/* + * pdacf_pcm_hw_params - hw_params callback for playback and capture + */ +static int pdacf_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)); +} + +/* + * pdacf_pcm_hw_free - hw_free callback for playback and capture + */ +static int pdacf_pcm_hw_free(snd_pcm_substream_t *subs) +{ + return snd_pcm_free_vmalloc_buffer(subs); +} + +/* + * pdacf_pcm_prepare - prepare callback for playback and capture + */ +static int pdacf_pcm_prepare(snd_pcm_substream_t *subs) +{ + pdacf_t *chip = snd_pcm_substream_chip(subs); + snd_pcm_runtime_t *runtime = subs->runtime; + u16 val, nval, aval; + + if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE) + return -EBUSY; + + chip->pcm_channels = runtime->channels; + + chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0; +#ifdef SNDRV_LITTLE_ENDIAN + chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0; +#else + chip->pcm_swab = chip->pcm_little; +#endif + + if (snd_pcm_format_unsigned(runtime->format)) + chip->pcm_xor = 0x80008000; + + if (pdacf_pcm_clear_sram(chip) < 0) + return -EIO; + + val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR); + nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1); + switch (runtime->format) { + case SNDRV_PCM_FORMAT_S16_LE: + case SNDRV_PCM_FORMAT_S16_BE: + break; + default: /* 24-bit */ + nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1; + break; + } + aval = 0; + chip->pcm_sample = 4; + switch (runtime->format) { + case SNDRV_PCM_FORMAT_S16_LE: + case SNDRV_PCM_FORMAT_S16_BE: + aval = AK4117_DIF_16R; + chip->pcm_frame = 2; + chip->pcm_sample = 2; + break; + case SNDRV_PCM_FORMAT_S24_3LE: + case SNDRV_PCM_FORMAT_S24_3BE: + chip->pcm_sample = 3; + /* fall trough */ + default: /* 24-bit */ + aval = AK4117_DIF_24R; + chip->pcm_frame = 3; + chip->pcm_xor &= 0xffff0000; + break; + } + + if (val != nval) { + snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval); + pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval); + } + + val = pdacf_reg_read(chip, PDAUDIOCF_REG_IER); + val &= ~(PDAUDIOCF_IRQLVLEN1); + val |= PDAUDIOCF_IRQLVLEN0; + pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val); + + chip->pcm_size = runtime->buffer_size; + chip->pcm_period = runtime->period_size; + chip->pcm_area = runtime->dma_area; + + return 0; +} + + +/* + * capture hw information + */ + +static snd_pcm_hardware_t pdacf_pcm_capture_hw = { + .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME | + SNDRV_PCM_INFO_MMAP_VALID), + .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | + SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | + SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE, + .rates = SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_88200 | + SNDRV_PCM_RATE_96000 | + SNDRV_PCM_RATE_176400 | + SNDRV_PCM_RATE_192000, + .rate_min = 32000, + .rate_max = 192000, + .channels_min = 1, + .channels_max = 2, + .buffer_bytes_max = (512*1024), + .period_bytes_min = 8*1024, + .period_bytes_max = (64*1024), + .periods_min = 2, + .periods_max = 128, + .fifo_size = 0, +}; + + +/* + * pdacf_pcm_capture_open - open callback for capture + */ +static int pdacf_pcm_capture_open(snd_pcm_substream_t *subs) +{ + snd_pcm_runtime_t *runtime = subs->runtime; + pdacf_t *chip = snd_pcm_substream_chip(subs); + + if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE) + return -EBUSY; + + runtime->hw = pdacf_pcm_capture_hw; + runtime->private_data = chip; + chip->pcm_substream = subs; + + return 0; +} + +/* + * pdacf_pcm_capture_close - close callback for capture + */ +static int pdacf_pcm_capture_close(snd_pcm_substream_t *subs) +{ + pdacf_t *chip = snd_pcm_substream_chip(subs); + + if (!chip) + return -EINVAL; + pdacf_reinit(chip, 0); + chip->pcm_substream = NULL; + return 0; +} + + +/* + * pdacf_pcm_capture_pointer - pointer callback for capture + */ +static snd_pcm_uframes_t pdacf_pcm_capture_pointer(snd_pcm_substream_t *subs) +{ + pdacf_t *chip = snd_pcm_substream_chip(subs); + return chip->pcm_hwptr; +} + +/* + * operators for PCM capture + */ +static snd_pcm_ops_t pdacf_pcm_capture_ops = { + .open = pdacf_pcm_capture_open, + .close = pdacf_pcm_capture_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = pdacf_pcm_hw_params, + .hw_free = pdacf_pcm_hw_free, + .prepare = pdacf_pcm_prepare, + .trigger = pdacf_pcm_trigger, + .pointer = pdacf_pcm_capture_pointer, + .page = snd_pcm_get_vmalloc_page, +}; + + +/* + * free callback for pcm + */ +static void snd_pdacf_pcm_free(snd_pcm_t *pcm) +{ + pdacf_t *chip = pcm->private_data; + chip->pcm = NULL; +} + +/* + * snd_pdacf_pcm_new - create and initialize a pcm + */ +int snd_pdacf_pcm_new(pdacf_t *chip) +{ + snd_pcm_t *pcm; + int err; + + err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm); + if (err < 0) + return err; + + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops); + + pcm->private_data = chip; + pcm->private_free = snd_pdacf_pcm_free; + pcm->info_flags = 0; + strcpy(pcm->name, chip->card->shortname); + chip->pcm = pcm; + + err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream); + if (err < 0) + return err; + + return 0; +} |
