diff options
Diffstat (limited to 'drivers/staging/cx25821/cx25821-alsa.c')
-rw-r--r-- | drivers/staging/cx25821/cx25821-alsa.c | 795 |
1 files changed, 0 insertions, 795 deletions
diff --git a/drivers/staging/cx25821/cx25821-alsa.c b/drivers/staging/cx25821/cx25821-alsa.c deleted file mode 100644 index 09e99de..0000000 --- a/drivers/staging/cx25821/cx25821-alsa.c +++ /dev/null @@ -1,795 +0,0 @@ -/* - * Driver for the Conexant CX25821 PCIe bridge - * - * Copyright (C) 2009 Conexant Systems Inc. - * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com> - * Based on SAA713x ALSA driver and CX88 driver - * - * 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, version 2 - * - * 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 - * - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#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 <linux/slab.h> - -#include <linux/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 "cx25821.h" -#include "cx25821-reg.h" - -#define AUDIO_SRAM_CHANNEL SRAM_CH08 - -#define dprintk(level, fmt, arg...) \ -do { \ - if (debug >= level) \ - pr_info("%s/1: " fmt, chip->dev->name, ##arg); \ -} while (0) -#define dprintk_core(level, fmt, arg...) \ -do { \ - if (debug >= level) \ - printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name, ##arg); \ -} while (0) - -/**************************************************************************** - Data type declarations - Can be moded to a header file later - ****************************************************************************/ - -static struct snd_card *snd_cx25821_cards[SNDRV_CARDS]; -static int devno; - -struct cx25821_audio_buffer { - unsigned int bpl; - struct btcx_riscmem risc; - struct videobuf_dmabuf dma; -}; - -struct cx25821_audio_dev { - struct cx25821_dev *dev; - struct cx25821_dmaqueue q; - - /* pci i/o */ - struct pci_dev *pci; - - /* audio controls */ - int irq; - - struct snd_card *card; - - unsigned long iobase; - spinlock_t reg_lock; - atomic_t count; - - unsigned int dma_size; - unsigned int period_size; - unsigned int num_periods; - - struct videobuf_dmabuf *dma_risc; - - struct cx25821_audio_buffer *buf; - - struct snd_pcm_substream *substream; -}; - - -/**************************************************************************** - Module global static vars - ****************************************************************************/ - -static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ -static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ -static int enable[SNDRV_CARDS] = { 1, [1 ... (SNDRV_CARDS - 1)] = 1 }; - -module_param_array(enable, bool, NULL, 0444); -MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled."); - -module_param_array(index, int, NULL, 0444); -MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s)."); - -/**************************************************************************** - Module macros - ****************************************************************************/ - -MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards"); -MODULE_AUTHOR("Hiep Huynh"); -MODULE_LICENSE("GPL"); -MODULE_SUPPORTED_DEVICE("{{Conexant,25821}"); /* "{{Conexant,23881}," */ - -static unsigned int debug; -module_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "enable debug messages"); - -/**************************************************************************** - Module 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 - -#define PCI_MSK_AUD_EXT (1 << 4) -#define PCI_MSK_AUD_INT (1 << 3) -/* - * BOARD Specific: Sets audio DMA - */ - -static int _cx25821_start_audio_dma(struct cx25821_audio_dev *chip) -{ - struct cx25821_audio_buffer *buf = chip->buf; - struct cx25821_dev *dev = chip->dev; - struct sram_channel *audio_ch = - &cx25821_sram_channels[AUDIO_SRAM_CHANNEL]; - u32 tmp = 0; - - /* enable output on the GPIO 0 for the MCLK ADC (Audio) */ - cx25821_set_gpiopin_direction(chip->dev, 0, 0); - - /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */ - cx_clear(AUD_INT_DMA_CTL, - FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); - - /* setup fifo + format - out channel */ - cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl, - buf->risc.dma); - - /* sets bpl size */ - cx_write(AUD_A_LNGTH, buf->bpl); - - /* reset counter */ - /* GP_COUNT_CONTROL_RESET = 0x3 */ - cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); - atomic_set(&chip->count, 0); - - /* Set the input mode to 16-bit */ - tmp = cx_read(AUD_A_CFG); - cx_write(AUD_A_CFG, - tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE | - FLD_AUD_CLK_ENABLE); - - /* - pr_info("DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d byte buffer\n", - buf->bpl, audio_ch->cmds_start, - 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(AUD_A_INT_MSK, - FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF | FLD_AUD_DST_SYNC | - FLD_AUD_DST_OPC_ERR); - - /* Clean any pending interrupt bits already set */ - cx_write(AUD_A_INT_STAT, ~0); - - /* enable audio irqs */ - cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT); - - /* Turn on audio downstream fifo and risc enable 0x101 */ - tmp = cx_read(AUD_INT_DMA_CTL); - cx_set(AUD_INT_DMA_CTL, - tmp | (FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN)); - - mdelay(100); - return 0; -} - -/* - * BOARD Specific: Resets audio DMA - */ -static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip) -{ - struct cx25821_dev *dev = chip->dev; - - /* stop dma */ - cx_clear(AUD_INT_DMA_CTL, - FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); - - /* disable irqs */ - cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT); - cx_clear(AUD_A_INT_MSK, - AUD_INT_OPC_ERR | AUD_INT_DN_SYNC | AUD_INT_DN_RISCI2 | - AUD_INT_DN_RISCI1); - - return 0; -} - -#define MAX_IRQ_LOOP 50 - -/* - * BOARD Specific: IRQ dma bits - */ -static char *cx25821_aud_irqs[32] = { - "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */ - NULL, /* reserved */ - "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */ - NULL, /* reserved */ - "dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */ - NULL, /* reserved */ - "dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */ - NULL, /* reserved */ - "opc_err", "par_err", "rip_err", /* 16-18 */ - "pci_abort", "ber_irq", "mchg_irq" /* 19-21 */ -}; - -/* - * BOARD Specific: Threats IRQ audio specific calls - */ -static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status, - u32 mask) -{ - struct cx25821_dev *dev = chip->dev; - - if (0 == (status & mask)) - return; - - cx_write(AUD_A_INT_STAT, status); - if (debug > 1 || (status & mask & ~0xff)) - cx25821_print_irqbits(dev->name, "irq aud", - cx25821_aud_irqs, - ARRAY_SIZE(cx25821_aud_irqs), status, - mask); - - /* risc op code error */ - if (status & AUD_INT_OPC_ERR) { - pr_warn("WARNING %s/1: Audio risc op code error\n", dev->name); - - cx_clear(AUD_INT_DMA_CTL, - FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN); - cx25821_sram_channel_dump_audio(dev, - &cx25821_sram_channels - [AUDIO_SRAM_CHANNEL]); - } - if (status & AUD_INT_DN_SYNC) { - pr_warn("WARNING %s: Downstream sync error!\n", dev->name); - cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET); - return; - } - - /* risc1 downstream */ - if (status & AUD_INT_DN_RISCI1) { - atomic_set(&chip->count, cx_read(AUD_A_GPCNT)); - snd_pcm_period_elapsed(chip->substream); - } -} - -/* - * BOARD Specific: Handles IRQ calls - */ -static irqreturn_t cx25821_irq(int irq, void *dev_id) -{ - struct cx25821_audio_dev *chip = dev_id; - struct cx25821_dev *dev = chip->dev; - u32 status, pci_status; - u32 audint_status, audint_mask; - int loop, handled = 0; - int audint_count = 0; - - audint_status = cx_read(AUD_A_INT_STAT); - audint_mask = cx_read(AUD_A_INT_MSK); - audint_count = cx_read(AUD_A_GPCNT); - status = cx_read(PCI_INT_STAT); - - for (loop = 0; loop < 1; loop++) { - status = cx_read(PCI_INT_STAT); - if (0 == status) { - status = cx_read(PCI_INT_STAT); - audint_status = cx_read(AUD_A_INT_STAT); - audint_mask = cx_read(AUD_A_INT_MSK); - - if (status) { - handled = 1; - cx_write(PCI_INT_STAT, status); - - cx25821_aud_irq(chip, audint_status, - audint_mask); - break; - } else - goto out; - } - - handled = 1; - cx_write(PCI_INT_STAT, status); - - cx25821_aud_irq(chip, audint_status, audint_mask); - } - - pci_status = cx_read(PCI_INT_STAT); - - if (handled) - cx_write(PCI_INT_STAT, pci_status); - -out: - return IRQ_RETVAL(handled); -} - -static int dsp_buffer_free(struct cx25821_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 384 -static struct snd_pcm_hardware snd_cx25821_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 / 3, - .period_bytes_max = DEFAULT_FIFO_SIZE / 3, - .periods_min = 1, - .periods_max = AUDIO_LINE_SIZE, - /* 128 * 128 = 16384 = 1024 * 16 */ - .buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE), -}; - -/* - * audio pcm capture open callback - */ -static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream) -{ - struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); - struct snd_pcm_runtime *runtime = substream->runtime; - int err; - unsigned int bpl = 0; - - if (!chip) { - pr_err("DEBUG: cx25821 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_cx25821_digital_hw; - - if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size != - DEFAULT_FIFO_SIZE) { - /* since there are 3 audio Clusters */ - bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3; - bpl &= ~7; /* must be multiple of 8 */ - - if (bpl > AUDIO_LINE_SIZE) - bpl = AUDIO_LINE_SIZE; - - 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_cx25821_close(struct snd_pcm_substream *substream) -{ - return 0; -} - -/* - * hw_params callback - */ -static int snd_cx25821_hw_params(struct snd_pcm_substream *substream, - struct snd_pcm_hw_params *hw_params) -{ - struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); - struct videobuf_dmabuf *dma; - - struct cx25821_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; - - if (chip->period_size > AUDIO_LINE_SIZE) - chip->period_size = AUDIO_LINE_SIZE; - - 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 = - cx25821_risc_databuffer_audio(chip->pci, &buf->risc, dma->sglist, - chip->period_size, chip->num_periods, - 1); - if (ret < 0) { - pr_info("DEBUG: ERROR after cx25821_risc_databuffer_audio()\n"); - 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_cx25821_hw_free(struct snd_pcm_substream *substream) -{ - struct cx25821_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_cx25821_prepare(struct snd_pcm_substream *substream) -{ - return 0; -} - -/* - * trigger callback - */ -static int snd_cx25821_card_trigger(struct snd_pcm_substream *substream, - int cmd) -{ - struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream); - int err = 0; - - /* Local interrupts are already disabled by ALSA */ - spin_lock(&chip->reg_lock); - - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: - err = _cx25821_start_audio_dma(chip); - break; - case SNDRV_PCM_TRIGGER_STOP: - err = _cx25821_stop_audio_dma(chip); - break; - default: - err = -EINVAL; - break; - } - - spin_unlock(&chip->reg_lock); - - return err; -} - -/* - * pointer callback - */ -static snd_pcm_uframes_t snd_cx25821_pointer(struct snd_pcm_substream - *substream) -{ - struct cx25821_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_cx25821_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_cx25821_pcm_ops = { - .open = snd_cx25821_pcm_open, - .close = snd_cx25821_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = snd_cx25821_hw_params, - .hw_free = snd_cx25821_hw_free, - .prepare = snd_cx25821_prepare, - .trigger = snd_cx25821_card_trigger, - .pointer = snd_cx25821_pointer, - .page = snd_cx25821_page, -}; - -/* - * ALSA create a PCM device: Called when initializing the board. - * Sets up the name and hooks up the callbacks - */ -static int snd_cx25821_pcm(struct cx25821_audio_dev *chip, int device, - char *name) -{ - struct snd_pcm *pcm; - int err; - - err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm); - if (err < 0) { - pr_info("ERROR: FAILED snd_pcm_new() in %s\n", __func__); - return err; - } - pcm->private_data = chip; - pcm->info_flags = 0; - strcpy(pcm->name, name); - snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx25821_pcm_ops); - - return 0; -} - -/**************************************************************************** - Basic Flow for Sound Devices - ****************************************************************************/ - -/* - * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio - * Only boards with eeprom and byte 1 at eeprom=1 have it - */ - -static DEFINE_PCI_DEVICE_TABLE(cx25821_audio_pci_tbl) = { - {0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, - {0,} -}; - -MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl); - -/* - * Not used in the function snd_cx25821_dev_free so removing - * from the file. - */ -/* -static int snd_cx25821_free(struct cx25821_audio_dev *chip) -{ - if (chip->irq >= 0) - free_irq(chip->irq, chip); - - cx25821_dev_unregister(chip->dev); - pci_disable_device(chip->pci); - - return 0; -} -*/ - -/* - * Component Destructor - */ -static void snd_cx25821_dev_free(struct snd_card *card) -{ - struct cx25821_audio_dev *chip = card->private_data; - - /* snd_cx25821_free(chip); */ - snd_card_free(chip->card); -} - -/* - * Alsa Constructor - Component probe - */ -static int cx25821_audio_initdev(struct cx25821_dev *dev) -{ - struct snd_card *card; - struct cx25821_audio_dev *chip; - int err; - - if (devno >= SNDRV_CARDS) { - pr_info("DEBUG ERROR: devno >= SNDRV_CARDS %s\n", __func__); - return -ENODEV; - } - - if (!enable[devno]) { - ++devno; - pr_info("DEBUG ERROR: !enable[devno] %s\n", __func__); - return -ENOENT; - } - - err = snd_card_create(index[devno], id[devno], THIS_MODULE, - sizeof(struct cx25821_audio_dev), &card); - if (err < 0) { - pr_info("DEBUG ERROR: cannot create snd_card_new in %s\n", - __func__); - return err; - } - - strcpy(card->driver, "cx25821"); - - /* Card "creation" */ - card->private_free = snd_cx25821_dev_free; - chip = card->private_data; - spin_lock_init(&chip->reg_lock); - - chip->dev = dev; - chip->card = card; - chip->pci = dev->pci; - chip->iobase = pci_resource_start(dev->pci, 0); - - chip->irq = dev->pci->irq; - - err = request_irq(dev->pci->irq, cx25821_irq, - IRQF_SHARED, chip->dev->name, chip); - - if (err < 0) { - pr_err("ERROR %s: can't get IRQ %d for ALSA\n", - chip->dev->name, dev->pci->irq); - goto error; - } - - err = snd_cx25821_pcm(chip, 0, "cx25821 Digital"); - if (err < 0) { - pr_info("DEBUG ERROR: cannot create snd_cx25821_pcm %s\n", - __func__); - goto error; - } - - snd_card_set_dev(card, &chip->pci->dev); - - strcpy(card->shortname, "cx25821"); - sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name, - chip->iobase, chip->irq); - strcpy(card->mixername, "CX25821"); - - pr_info("%s/%i: ALSA support for cx25821 boards\n", - card->driver, devno); - - err = snd_card_register(card); - if (err < 0) { - pr_info("DEBUG ERROR: cannot register sound card %s\n", - __func__); - goto error; - } - - snd_cx25821_cards[devno] = card; - - devno++; - return 0; - -error: - snd_card_free(card); - return err; -} - -/**************************************************************************** - LINUX MODULE INIT - ****************************************************************************/ -static void cx25821_audio_fini(void) -{ - snd_card_free(snd_cx25821_cards[0]); -} - -/* - * Module initializer - * - * Loops through present saa7134 cards, and assigns an ALSA device - * to each one - * - */ -static int cx25821_alsa_init(void) -{ - struct cx25821_dev *dev = NULL; - struct list_head *list; - - mutex_lock(&cx25821_devlist_mutex); - list_for_each(list, &cx25821_devlist) { - dev = list_entry(list, struct cx25821_dev, devlist); - cx25821_audio_initdev(dev); - } - mutex_unlock(&cx25821_devlist_mutex); - - if (dev == NULL) - pr_info("ERROR ALSA: no cx25821 cards found\n"); - - return 0; - -} - -late_initcall(cx25821_alsa_init); -module_exit(cx25821_audio_fini); - -/* ----------------------------------------------------------- */ -/* - * Local variables: - * c-basic-offset: 8 - * End: - */ |