diff options
Diffstat (limited to 'drivers/media/video/cx23885/cx23885-alsa.c')
| -rw-r--r-- | drivers/media/video/cx23885/cx23885-alsa.c | 535 |
1 files changed, 0 insertions, 535 deletions
diff --git a/drivers/media/video/cx23885/cx23885-alsa.c b/drivers/media/video/cx23885/cx23885-alsa.c deleted file mode 100644 index 795169237e70..000000000000 --- a/drivers/media/video/cx23885/cx23885-alsa.c +++ /dev/null @@ -1,535 +0,0 @@ -/* - * - * Support for CX23885 analog audio capture - * - * (c) 2008 Mijhail Moreyra <mijhail.moreyra@gmail.com> - * Adapted from cx88-alsa.c - * (c) 2009 Steven Toth <stoth@kernellabs.com> - * - * 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., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/device.h> -#include <linux/interrupt.h> -#include <linux/vmalloc.h> -#include <linux/dma-mapping.h> -#include <linux/pci.h> - -#include <asm/delay.h> - -#include <sound/core.h> -#include <sound/pcm.h> -#include <sound/pcm_params.h> -#include <sound/control.h> -#include <sound/initval.h> - -#include <sound/tlv.h> - - -#include "cx23885.h" -#include "cx23885-reg.h" - -#define AUDIO_SRAM_CHANNEL SRAM_CH07 - -#define dprintk(level, fmt, arg...) if (audio_debug >= level) \ - printk(KERN_INFO "%s: " fmt, chip->dev->name , ## arg) - -#define dprintk_core(level, fmt, arg...) if (audio_debug >= level) \ - printk(KERN_DEBUG "%s: " fmt, chip->dev->name , ## arg) - -/**************************************************************************** - Module global static vars - ****************************************************************************/ - -static unsigned int disable_analog_audio; -module_param(disable_analog_audio, int, 0644); -MODULE_PARM_DESC(disable_analog_audio, "disable analog audio ALSA driver"); - -static unsigned int audio_debug; -module_param(audio_debug, int, 0644); -MODULE_PARM_DESC(audio_debug, "enable debug messages [analog audio]"); - -/**************************************************************************** - Board specific funtions - ****************************************************************************/ - -/* Constants taken from cx88-reg.h */ -#define AUD_INT_DN_RISCI1 (1 << 0) -#define AUD_INT_UP_RISCI1 (1 << 1) -#define AUD_INT_RDS_DN_RISCI1 (1 << 2) -#define AUD_INT_DN_RISCI2 (1 << 4) /* yes, 3 is skipped */ -#define AUD_INT_UP_RISCI2 (1 << 5) -#define AUD_INT_RDS_DN_RISCI2 (1 << 6) -#define AUD_INT_DN_SYNC (1 << 12) -#define AUD_INT_UP_SYNC (1 << 13) -#define AUD_INT_RDS_DN_SYNC (1 << 14) -#define AUD_INT_OPC_ERR (1 << 16) -#define AUD_INT_BER_IRQ (1 << 20) -#define AUD_INT_MCHG_IRQ (1 << 21) -#define GP_COUNT_CONTROL_RESET 0x3 - -/* - * BOARD Specific: Sets audio DMA - */ - -static int cx23885_start_audio_dma(struct cx23885_audio_dev *chip) -{ - struct cx23885_audio_buffer *buf = chip->buf; - struct cx23885_dev *dev = chip->dev; - struct sram_channel *audio_ch = - &dev->sram_channels[AUDIO_SRAM_CHANNEL]; - - dprintk(1, "%s()\n", __func__); - - /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */ - cx_clear(AUD_INT_DMA_CTL, 0x11); - - /* setup fifo + format - out channel */ - cx23885_sram_channel_setup(chip->dev, audio_ch, buf->bpl, - buf->risc.dma); - - /* sets bpl size */ - cx_write(AUD_INT_A_LNGTH, buf->bpl); - - /* This is required to get good audio (1 seems to be ok) */ - cx_write(AUD_INT_A_MODE, 1); - - /* reset counter */ - cx_write(AUD_INT_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); - atomic_set(&chip->count, 0); - - dprintk(1, "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d " - "byte buffer\n", buf->bpl, cx_read(audio_ch->cmds_start+12)>>1, - chip->num_periods, buf->bpl * chip->num_periods); - - /* Enables corresponding bits at AUD_INT_STAT */ - cx_write(AUDIO_INT_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | - AUD_INT_DN_RISCI1); - - /* Clean any pending interrupt bits already set */ - cx_write(AUDIO_INT_INT_STAT, ~0); - - /* enable audio irqs */ - cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT); - - /* start dma */ - cx_set(DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */ - cx_set(AUD_INT_DMA_CTL, 0x11); /* audio downstream FIFO and - RISC enable */ - if (audio_debug) - cx23885_sram_channel_dump(chip->dev, audio_ch); - - return 0; -} - -/* - * BOARD Specific: Resets audio DMA - */ -static int cx23885_stop_audio_dma(struct cx23885_audio_dev *chip) -{ - struct cx23885_dev *dev = chip->dev; - dprintk(1, "Stopping audio DMA\n"); - - /* stop dma */ - cx_clear(AUD_INT_DMA_CTL, 0x11); - - /* disable irqs */ - cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT); - cx_clear(AUDIO_INT_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | - AUD_INT_DN_RISCI1); - - if (audio_debug) - cx23885_sram_channel_dump(chip->dev, - &dev->sram_channels[AUDIO_SRAM_CHANNEL]); - - return 0; -} - -/* - * BOARD Specific: Handles audio IRQ - */ -int cx23885_audio_irq(struct cx23885_dev *dev, u32 status, u32 mask) -{ - struct cx23885_audio_dev *chip = dev->audio_dev; - - if (0 == (status & mask)) - return 0; - - cx_write(AUDIO_INT_INT_STAT, status); - - /* risc op code error */ - if (status & AUD_INT_OPC_ERR) { - printk(KERN_WARNING "%s/1: Audio risc op code error\n", - dev->name); - cx_clear(AUD_INT_DMA_CTL, 0x11); - cx23885_sram_channel_dump(dev, - &dev->sram_channels[AUDIO_SRAM_CHANNEL]); - } - if (status & AUD_INT_DN_SYNC) { - dprintk(1, "Downstream sync error\n"); - cx_write(AUD_INT_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); - return 1; - } - /* risc1 downstream */ - if (status & AUD_INT_DN_RISCI1) { - atomic_set(&chip->count, cx_read(AUD_INT_A_GPCNT)); - snd_pcm_period_elapsed(chip->substream); - } - /* FIXME: Any other status should deserve a special handling? */ - - return 1; -} - -static int dsp_buffer_free(struct cx23885_audio_dev *chip) -{ - BUG_ON(!chip->dma_size); - - dprintk(2, "Freeing buffer\n"); - videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc); - videobuf_dma_free(chip->dma_risc); - btcx_riscmem_free(chip->pci, &chip->buf->risc); - kfree(chip->buf); - - chip->dma_risc = NULL; - chip->dma_size = 0; - - return 0; -} - -/**************************************************************************** - ALSA PCM Interface - ****************************************************************************/ - -/* - * Digital hardware definition - */ -#define DEFAULT_FIFO_SIZE 4096 - -static struct snd_pcm_hardware snd_cx23885_digital_hw = { - .info = SNDRV_PCM_INFO_MMAP | - SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_BLOCK_TRANSFER | - SNDRV_PCM_INFO_MMAP_VALID, - .formats = SNDRV_PCM_FMTBIT_S16_LE, - - .rates = SNDRV_PCM_RATE_48000, - .rate_min = 48000, - .rate_max = 48000, - .channels_min = 2, - .channels_max = 2, - /* Analog audio output will be full of clicks and pops if there - are not exactly four lines in the SRAM FIFO buffer. */ - .period_bytes_min = DEFAULT_FIFO_SIZE/4, - .period_bytes_max = DEFAULT_FIFO_SIZE/4, - .periods_min = 1, - .periods_max = 1024, - .buffer_bytes_max = (1024*1024), -}; - -/* - * audio pcm capture open callback - */ -static int snd_cx23885_pcm_open(struct snd_pcm_substream *substream) -{ - struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); - struct snd_pcm_runtime *runtime = substream->runtime; - int err; - - if (!chip) { - printk(KERN_ERR "BUG: cx23885 can't find device struct." - " Can't proceed with open\n"); - return -ENODEV; - } - - err = snd_pcm_hw_constraint_pow2(runtime, 0, - SNDRV_PCM_HW_PARAM_PERIODS); - if (err < 0) - goto _error; - - chip->substream = substream; - - runtime->hw = snd_cx23885_digital_hw; - - if (chip->dev->sram_channels[AUDIO_SRAM_CHANNEL].fifo_size != - DEFAULT_FIFO_SIZE) { - unsigned int bpl = chip->dev-> - sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 4; - bpl &= ~7; /* must be multiple of 8 */ - runtime->hw.period_bytes_min = bpl; - runtime->hw.period_bytes_max = bpl; - } - - return 0; -_error: - dprintk(1, "Error opening PCM!\n"); - return err; -} - -/* - * audio close callback - */ -static int snd_cx23885_close(struct snd_pcm_substream *substream) -{ - return 0; -} - -/* - * hw_params callback - */ -static int snd_cx23885_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *hw_params) -{ - struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); - struct videobuf_dmabuf *dma; - - struct cx23885_audio_buffer *buf; - int ret; - - if (substream->runtime->dma_area) { - dsp_buffer_free(chip); - substream->runtime->dma_area = NULL; - } - - chip->period_size = params_period_bytes(hw_params); - chip->num_periods = params_periods(hw_params); - chip->dma_size = chip->period_size * params_periods(hw_params); - - BUG_ON(!chip->dma_size); - BUG_ON(chip->num_periods & (chip->num_periods-1)); - - buf = kzalloc(sizeof(*buf), GFP_KERNEL); - if (NULL == buf) - return -ENOMEM; - - buf->bpl = chip->period_size; - - dma = &buf->dma; - videobuf_dma_init(dma); - ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE, - (PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT)); - if (ret < 0) - goto error; - - ret = videobuf_dma_map(&chip->pci->dev, dma); - if (ret < 0) - goto error; - - ret = cx23885_risc_databuffer(chip->pci, &buf->risc, dma->sglist, - chip->period_size, chip->num_periods, 1); - if (ret < 0) - goto error; - - /* Loop back to start of program */ - buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC); - buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma); - buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */ - - chip->buf = buf; - chip->dma_risc = dma; - - substream->runtime->dma_area = chip->dma_risc->vaddr; - substream->runtime->dma_bytes = chip->dma_size; - substream->runtime->dma_addr = 0; - - return 0; - -error: - kfree(buf); - return ret; -} - -/* - * hw free callback - */ -static int snd_cx23885_hw_free(struct snd_pcm_substream *substream) -{ - - struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); - - if (substream->runtime->dma_area) { - dsp_buffer_free(chip); - substream->runtime->dma_area = NULL; - } - - return 0; -} - -/* - * prepare callback - */ -static int snd_cx23885_prepare(struct snd_pcm_substream *substream) -{ - return 0; -} - -/* - * trigger callback - */ -static int snd_cx23885_card_trigger(struct snd_pcm_substream *substream, - int cmd) -{ - struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); - int err; - - /* Local interrupts are already disabled by ALSA */ - spin_lock(&chip->lock); - - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - err = cx23885_start_audio_dma(chip); - break; - case SNDRV_PCM_TRIGGER_STOP: - err = cx23885_stop_audio_dma(chip); - break; - default: - err = -EINVAL; - break; - } - - spin_unlock(&chip->lock); - - return err; -} - -/* - * pointer callback - */ -static snd_pcm_uframes_t snd_cx23885_pointer( - struct snd_pcm_substream *substream) -{ - struct cx23885_audio_dev *chip = snd_pcm_substream_chip(substream); - struct snd_pcm_runtime *runtime = substream->runtime; - u16 count; - - count = atomic_read(&chip->count); - - return runtime->period_size * (count & (runtime->periods-1)); -} - -/* - * page callback (needed for mmap) - */ -static struct page *snd_cx23885_page(struct snd_pcm_substream *substream, - unsigned long offset) -{ - void *pageptr = substream->runtime->dma_area + offset; - return vmalloc_to_page(pageptr); -} - -/* - * operators - */ -static struct snd_pcm_ops snd_cx23885_pcm_ops = { - .open = snd_cx23885_pcm_open, - .close = snd_cx23885_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = snd_cx23885_hw_params, - .hw_free = snd_cx23885_hw_free, - .prepare = snd_cx23885_prepare, - .trigger = snd_cx23885_card_trigger, - .pointer = snd_cx23885_pointer, - .page = snd_cx23885_page, -}; - -/* - * create a PCM device - */ -static int snd_cx23885_pcm(struct cx23885_audio_dev *chip, int device, - char *name) -{ - int err; - struct snd_pcm *pcm; - - err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm); - if (err < 0) - return err; - pcm->private_data = chip; - strcpy(pcm->name, name); - snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx23885_pcm_ops); - - return 0; -} - -/**************************************************************************** - Basic Flow for Sound Devices - ****************************************************************************/ - -/* - * Alsa Constructor - Component probe - */ - -struct cx23885_audio_dev *cx23885_audio_register(struct cx23885_dev *dev) -{ - struct snd_card *card; - struct cx23885_audio_dev *chip; - int err; - - if (disable_analog_audio) - return NULL; - - if (dev->sram_channels[AUDIO_SRAM_CHANNEL].cmds_start == 0) { - printk(KERN_WARNING "%s(): Missing SRAM channel configuration " - "for analog TV Audio\n", __func__); - return NULL; - } - - err = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, - THIS_MODULE, sizeof(struct cx23885_audio_dev), &card); - if (err < 0) - goto error; - - chip = (struct cx23885_audio_dev *) card->private_data; - chip->dev = dev; - chip->pci = dev->pci; - chip->card = card; - spin_lock_init(&chip->lock); - - snd_card_set_dev(card, &dev->pci->dev); - - err = snd_cx23885_pcm(chip, 0, "CX23885 Digital"); - if (err < 0) - goto error; - - strcpy(card->driver, "CX23885"); - sprintf(card->shortname, "Conexant CX23885"); - sprintf(card->longname, "%s at %s", card->shortname, dev->name); - - err = snd_card_register(card); - if (err < 0) - goto error; - - dprintk(0, "registered ALSA audio device\n"); - - return chip; - -error: - snd_card_free(card); - printk(KERN_ERR "%s(): Failed to register analog " - "audio adapter\n", __func__); - - return NULL; -} - -/* - * ALSA destructor - */ -void cx23885_audio_unregister(struct cx23885_dev *dev) -{ - struct cx23885_audio_dev *chip = dev->audio_dev; - - snd_card_free(chip->card); -} |