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path: root/drivers/media/pci/cx25821/cx25821-alsa.c
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Diffstat (limited to 'drivers/media/pci/cx25821/cx25821-alsa.c')
-rw-r--r--drivers/media/pci/cx25821/cx25821-alsa.c784
1 files changed, 784 insertions, 0 deletions
diff --git a/drivers/media/pci/cx25821/cx25821-alsa.c b/drivers/media/pci/cx25821/cx25821-alsa.c
new file mode 100644
index 000000000000..1858a45dd081
--- /dev/null
+++ b/drivers/media/pci/cx25821/cx25821-alsa.c
@@ -0,0 +1,784 @@
+/*
+ * 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 bool 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;
+
+ audint_status = cx_read(AUD_A_INT_STAT);
+ audint_mask = cx_read(AUD_A_INT_MSK);
+ 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:
+ */

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