diff options
Diffstat (limited to 'drivers/staging/solo6x10/g723.c')
-rw-r--r-- | drivers/staging/solo6x10/g723.c | 398 |
1 files changed, 398 insertions, 0 deletions
diff --git a/drivers/staging/solo6x10/g723.c b/drivers/staging/solo6x10/g723.c new file mode 100644 index 000000000000..4aba8f3dbe60 --- /dev/null +++ b/drivers/staging/solo6x10/g723.c @@ -0,0 +1,398 @@ +/* + * Copyright (C) 2010 Bluecherry, LLC www.bluecherrydvr.com + * Copyright (C) 2010 Ben Collins <bcollins@bluecherry.net> + * + * 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 <linux/kernel.h> +#include <linux/mempool.h> +#include <linux/poll.h> +#include <linux/kthread.h> +#include <linux/freezer.h> +#include <sound/core.h> +#include <sound/initval.h> +#include <sound/pcm.h> +#include <sound/control.h> +#include "solo6x10.h" +#include "tw28.h" + +#define G723_INTR_ORDER 0 +#define G723_FDMA_PAGES 32 +#define G723_PERIOD_BYTES 48 +#define G723_PERIOD_BLOCK 1024 +#define G723_FRAMES_PER_PAGE 48 + +/* Sets up channels 16-19 for decoding and 0-15 for encoding */ +#define OUTMODE_MASK 0x300 + +#define SAMPLERATE 8000 +#define BITRATE 25 + +/* The solo writes to 1k byte pages, 32 pages, in the dma. Each 1k page + * is broken down to 20 * 48 byte regions (one for each channel possible) + * with the rest of the page being dummy data. */ +#define MAX_BUFFER (G723_PERIOD_BYTES * PERIODS_MAX) +#define IRQ_PAGES 4 /* 0 - 4 */ +#define PERIODS_MIN (1 << IRQ_PAGES) +#define PERIODS_MAX G723_FDMA_PAGES + +struct solo_snd_pcm { + int on; + spinlock_t lock; + struct solo6010_dev *solo_dev; + unsigned char g723_buf[G723_PERIOD_BYTES]; +}; + +static void solo_g723_config(struct solo6010_dev *solo_dev) +{ + int clk_div; + + clk_div = SOLO_CLOCK_MHZ / (SAMPLERATE * (BITRATE * 2) * 2); + + solo_reg_write(solo_dev, SOLO_AUDIO_SAMPLE, + SOLO_AUDIO_BITRATE(BITRATE) | + SOLO_AUDIO_CLK_DIV(clk_div)); + + solo_reg_write(solo_dev, SOLO_AUDIO_FDMA_INTR, + SOLO_AUDIO_FDMA_INTERVAL(IRQ_PAGES) | + SOLO_AUDIO_INTR_ORDER(G723_INTR_ORDER) | + SOLO_AUDIO_FDMA_BASE(SOLO_G723_EXT_ADDR(solo_dev) >> 16)); + + solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, + SOLO_AUDIO_ENABLE | SOLO_AUDIO_I2S_MODE | + SOLO_AUDIO_I2S_MULTI(3) | SOLO_AUDIO_MODE(OUTMODE_MASK)); +} + +void solo_g723_isr(struct solo6010_dev *solo_dev) +{ + struct snd_pcm_str *pstr = + &solo_dev->snd_pcm->streams[SNDRV_PCM_STREAM_CAPTURE]; + struct snd_pcm_substream *ss; + struct solo_snd_pcm *solo_pcm; + + solo_reg_write(solo_dev, SOLO_IRQ_STAT, SOLO_IRQ_G723); + + for (ss = pstr->substream; ss != NULL; ss = ss->next) { + if (snd_pcm_substream_chip(ss) == NULL) + continue; + + /* This means open() hasn't been called on this one */ + if (snd_pcm_substream_chip(ss) == solo_dev) + continue; + + /* Haven't triggered a start yet */ + solo_pcm = snd_pcm_substream_chip(ss); + if (!solo_pcm->on) + continue; + + snd_pcm_period_elapsed(ss); + } +} + +static int snd_solo_hw_params(struct snd_pcm_substream *ss, + struct snd_pcm_hw_params *hw_params) +{ + return snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params)); +} + +static int snd_solo_hw_free(struct snd_pcm_substream *ss) +{ + return snd_pcm_lib_free_pages(ss); +} + +static struct snd_pcm_hardware snd_solo_pcm_hw = { + .info = (SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP_VALID), + .formats = SNDRV_PCM_FMTBIT_U8, + .rates = SNDRV_PCM_RATE_8000, + .rate_min = 8000, + .rate_max = 8000, + .channels_min = 1, + .channels_max = 1, + .buffer_bytes_max = MAX_BUFFER, + .period_bytes_min = G723_PERIOD_BYTES, + .period_bytes_max = G723_PERIOD_BYTES, + .periods_min = PERIODS_MIN, + .periods_max = PERIODS_MAX, +}; + +static int snd_solo_pcm_open(struct snd_pcm_substream *ss) +{ + struct solo6010_dev *solo_dev = snd_pcm_substream_chip(ss); + struct solo_snd_pcm *solo_pcm; + + solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL); + if (solo_pcm == NULL) + return -ENOMEM; + + spin_lock_init(&solo_pcm->lock); + solo_pcm->solo_dev = solo_dev; + ss->runtime->hw = snd_solo_pcm_hw; + + snd_pcm_substream_chip(ss) = solo_pcm; + + return 0; +} + +static int snd_solo_pcm_close(struct snd_pcm_substream *ss) +{ + struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); + + snd_pcm_substream_chip(ss) = solo_pcm->solo_dev; + kfree(solo_pcm); + + return 0; +} + +static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd) +{ + struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); + struct solo6010_dev *solo_dev = solo_pcm->solo_dev; + int ret = 0; + + spin_lock(&solo_pcm->lock); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + if (solo_pcm->on == 0) { + /* If this is the first user, switch on interrupts */ + if (atomic_inc_return(&solo_dev->snd_users) == 1) + solo6010_irq_on(solo_dev, SOLO_IRQ_G723); + solo_pcm->on = 1; + } + break; + case SNDRV_PCM_TRIGGER_STOP: + if (solo_pcm->on) { + /* If this was our last user, switch them off */ + if (atomic_dec_return(&solo_dev->snd_users) == 0) + solo6010_irq_off(solo_dev, SOLO_IRQ_G723); + solo_pcm->on = 0; + } + break; + default: + ret = -EINVAL; + } + + spin_unlock(&solo_pcm->lock); + + return ret; +} + +static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss) +{ + return 0; +} + +static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss) +{ + struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); + struct solo6010_dev *solo_dev = solo_pcm->solo_dev; + snd_pcm_uframes_t idx = solo_reg_read(solo_dev, SOLO_AUDIO_STA) & 0x1f; + + return idx * G723_FRAMES_PER_PAGE; +} + +static int snd_solo_pcm_copy(struct snd_pcm_substream *ss, int channel, + snd_pcm_uframes_t pos, void __user *dst, + snd_pcm_uframes_t count) +{ + struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); + struct solo6010_dev *solo_dev = solo_pcm->solo_dev; + int err, i; + + for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) { + int page = (pos / G723_FRAMES_PER_PAGE) + i; + + err = solo_p2m_dma(solo_dev, SOLO_P2M_DMA_ID_G723E, 0, + solo_pcm->g723_buf, + SOLO_G723_EXT_ADDR(solo_dev) + + (page * G723_PERIOD_BLOCK) + + (ss->number * G723_PERIOD_BYTES), + G723_PERIOD_BYTES); + if (err) + return err; + + err = copy_to_user(dst + (i * G723_PERIOD_BYTES), + solo_pcm->g723_buf, G723_PERIOD_BYTES); + + if (err) + return -EFAULT; + } + + return 0; +} + +static struct snd_pcm_ops snd_solo_pcm_ops = { + .open = snd_solo_pcm_open, + .close = snd_solo_pcm_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = snd_solo_hw_params, + .hw_free = snd_solo_hw_free, + .prepare = snd_solo_pcm_prepare, + .trigger = snd_solo_pcm_trigger, + .pointer = snd_solo_pcm_pointer, + .copy = snd_solo_pcm_copy, +}; + +static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *info) +{ + info->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + info->count = 1; + info->value.integer.min = 0; + info->value.integer.max = 15; + info->value.integer.step = 1; + + return 0; +} + +static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *value) +{ + struct solo6010_dev *solo_dev = snd_kcontrol_chip(kcontrol); + u8 ch = value->id.numid - 1; + + value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch); + + return 0; +} + +static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *value) +{ + struct solo6010_dev *solo_dev = snd_kcontrol_chip(kcontrol); + u8 ch = value->id.numid - 1; + u8 old_val; + + old_val = tw28_get_audio_gain(solo_dev, ch); + if (old_val == value->value.integer.value[0]) + return 0; + + tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]); + + return 1; +} + +static struct snd_kcontrol_new snd_solo_capture_volume = { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "Capture Volume", + .info = snd_solo_capture_volume_info, + .get = snd_solo_capture_volume_get, + .put = snd_solo_capture_volume_put, +}; + +static int solo_snd_pcm_init(struct solo6010_dev *solo_dev) +{ + struct snd_card *card = solo_dev->snd_card; + struct snd_pcm *pcm; + struct snd_pcm_substream *ss; + int ret; + int i; + + ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans, + &pcm); + if (ret < 0) + return ret; + + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, + &snd_solo_pcm_ops); + + snd_pcm_chip(pcm) = solo_dev; + pcm->info_flags = 0; + strcpy(pcm->name, card->shortname); + + for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; + ss; ss = ss->next, i++) + sprintf(ss->name, "Camera #%d Audio", i); + + ret = snd_pcm_lib_preallocate_pages_for_all(pcm, + SNDRV_DMA_TYPE_CONTINUOUS, + snd_dma_continuous_data(GFP_KERNEL), + MAX_BUFFER, MAX_BUFFER); + if (ret < 0) + return ret; + + solo_dev->snd_pcm = pcm; + + return 0; +} + +int solo_g723_init(struct solo6010_dev *solo_dev) +{ + static struct snd_device_ops ops = { NULL }; + struct snd_card *card; + struct snd_kcontrol_new kctl; + char name[32]; + int ret; + + atomic_set(&solo_dev->snd_users, 0); + + /* Allows for easier mapping between video and audio */ + sprintf(name, "Softlogic%d", solo_dev->vfd->num); + + ret = snd_card_create(SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0, + &solo_dev->snd_card); + if (ret < 0) + return ret; + + card = solo_dev->snd_card; + + strcpy(card->driver, SOLO6010_NAME); + strcpy(card->shortname, "SOLO-6010 Audio"); + sprintf(card->longname, "%s on %s IRQ %d", card->shortname, + pci_name(solo_dev->pdev), solo_dev->pdev->irq); + snd_card_set_dev(card, &solo_dev->pdev->dev); + + ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops); + if (ret < 0) + goto snd_error; + + /* Mixer controls */ + strcpy(card->mixername, "SOLO-6010"); + kctl = snd_solo_capture_volume; + kctl.count = solo_dev->nr_chans; + ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev)); + if (ret < 0) + return ret; + + ret = solo_snd_pcm_init(solo_dev); + if (ret < 0) + goto snd_error; + + ret = snd_card_register(card); + if (ret < 0) + goto snd_error; + + solo_g723_config(solo_dev); + + dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name); + + return 0; + +snd_error: + snd_card_free(card); + return ret; +} + +void solo_g723_exit(struct solo6010_dev *solo_dev) +{ + solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0); + solo6010_irq_off(solo_dev, SOLO_IRQ_G723); + + snd_card_free(solo_dev->snd_card); +} |