mirror of https://gitee.com/openkylin/linux.git
830 lines
20 KiB
C
830 lines
20 KiB
C
/*
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* Driver for the Conexant CX25821 PCIe bridge
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*
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* Copyright (C) 2009 Conexant Systems Inc.
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* Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
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* Based on SAA713x ALSA driver and CX88 driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/vmalloc.h>
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#include <linux/dma-mapping.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/control.h>
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#include <sound/initval.h>
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#include <sound/tlv.h>
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#include "cx25821.h"
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#include "cx25821-reg.h"
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#define AUDIO_SRAM_CHANNEL SRAM_CH08
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#define dprintk(level, fmt, arg...) \
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do { \
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if (debug >= level) \
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pr_info("%s/1: " fmt, chip->dev->name, ##arg); \
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} while (0)
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#define dprintk_core(level, fmt, arg...) \
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do { \
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if (debug >= level) \
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printk(KERN_DEBUG "%s/1: " fmt, chip->dev->name, ##arg); \
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} while (0)
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/****************************************************************************
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Data type declarations - Can be moded to a header file later
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****************************************************************************/
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static int devno;
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struct cx25821_audio_buffer {
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unsigned int bpl;
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struct cx25821_riscmem risc;
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void *vaddr;
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struct scatterlist *sglist;
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int sglen;
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int nr_pages;
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};
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struct cx25821_audio_dev {
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struct cx25821_dev *dev;
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struct cx25821_dmaqueue q;
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/* pci i/o */
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struct pci_dev *pci;
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/* audio controls */
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int irq;
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struct snd_card *card;
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unsigned long iobase;
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spinlock_t reg_lock;
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atomic_t count;
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unsigned int dma_size;
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unsigned int period_size;
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unsigned int num_periods;
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struct cx25821_audio_buffer *buf;
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struct snd_pcm_substream *substream;
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};
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/****************************************************************************
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Module global static vars
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****************************************************************************/
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
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static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
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static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
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module_param_array(enable, bool, NULL, 0444);
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MODULE_PARM_DESC(enable, "Enable cx25821 soundcard. default enabled.");
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module_param_array(index, int, NULL, 0444);
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MODULE_PARM_DESC(index, "Index value for cx25821 capture interface(s).");
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/****************************************************************************
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Module macros
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****************************************************************************/
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MODULE_DESCRIPTION("ALSA driver module for cx25821 based capture cards");
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MODULE_AUTHOR("Hiep Huynh");
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MODULE_LICENSE("GPL");
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MODULE_SUPPORTED_DEVICE("{{Conexant,25821}"); /* "{{Conexant,23881}," */
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static unsigned int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "enable debug messages");
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/****************************************************************************
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Module specific funtions
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****************************************************************************/
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/* Constants taken from cx88-reg.h */
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#define AUD_INT_DN_RISCI1 (1 << 0)
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#define AUD_INT_UP_RISCI1 (1 << 1)
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#define AUD_INT_RDS_DN_RISCI1 (1 << 2)
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#define AUD_INT_DN_RISCI2 (1 << 4) /* yes, 3 is skipped */
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#define AUD_INT_UP_RISCI2 (1 << 5)
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#define AUD_INT_RDS_DN_RISCI2 (1 << 6)
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#define AUD_INT_DN_SYNC (1 << 12)
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#define AUD_INT_UP_SYNC (1 << 13)
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#define AUD_INT_RDS_DN_SYNC (1 << 14)
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#define AUD_INT_OPC_ERR (1 << 16)
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#define AUD_INT_BER_IRQ (1 << 20)
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#define AUD_INT_MCHG_IRQ (1 << 21)
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#define GP_COUNT_CONTROL_RESET 0x3
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#define PCI_MSK_AUD_EXT (1 << 4)
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#define PCI_MSK_AUD_INT (1 << 3)
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static int cx25821_alsa_dma_init(struct cx25821_audio_dev *chip, int nr_pages)
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{
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struct cx25821_audio_buffer *buf = chip->buf;
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struct page *pg;
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int i;
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buf->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
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if (NULL == buf->vaddr) {
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dprintk(1, "vmalloc_32(%d pages) failed\n", nr_pages);
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return -ENOMEM;
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}
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dprintk(1, "vmalloc is at addr 0x%p, size=%d\n",
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buf->vaddr,
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nr_pages << PAGE_SHIFT);
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memset(buf->vaddr, 0, nr_pages << PAGE_SHIFT);
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buf->nr_pages = nr_pages;
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buf->sglist = vzalloc(array_size(sizeof(*buf->sglist), buf->nr_pages));
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if (NULL == buf->sglist)
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goto vzalloc_err;
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sg_init_table(buf->sglist, buf->nr_pages);
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for (i = 0; i < buf->nr_pages; i++) {
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pg = vmalloc_to_page(buf->vaddr + i * PAGE_SIZE);
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if (NULL == pg)
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goto vmalloc_to_page_err;
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sg_set_page(&buf->sglist[i], pg, PAGE_SIZE, 0);
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}
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return 0;
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vmalloc_to_page_err:
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vfree(buf->sglist);
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buf->sglist = NULL;
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vzalloc_err:
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vfree(buf->vaddr);
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buf->vaddr = NULL;
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return -ENOMEM;
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}
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static int cx25821_alsa_dma_map(struct cx25821_audio_dev *dev)
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{
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struct cx25821_audio_buffer *buf = dev->buf;
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buf->sglen = dma_map_sg(&dev->pci->dev, buf->sglist,
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buf->nr_pages, PCI_DMA_FROMDEVICE);
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if (0 == buf->sglen) {
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pr_warn("%s: cx25821_alsa_map_sg failed\n", __func__);
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return -ENOMEM;
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}
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return 0;
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}
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static int cx25821_alsa_dma_unmap(struct cx25821_audio_dev *dev)
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{
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struct cx25821_audio_buffer *buf = dev->buf;
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if (!buf->sglen)
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return 0;
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dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen, PCI_DMA_FROMDEVICE);
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buf->sglen = 0;
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return 0;
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}
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static int cx25821_alsa_dma_free(struct cx25821_audio_buffer *buf)
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{
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vfree(buf->sglist);
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buf->sglist = NULL;
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vfree(buf->vaddr);
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buf->vaddr = NULL;
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return 0;
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}
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/*
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* BOARD Specific: Sets audio DMA
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*/
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static int _cx25821_start_audio_dma(struct cx25821_audio_dev *chip)
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{
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struct cx25821_audio_buffer *buf = chip->buf;
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struct cx25821_dev *dev = chip->dev;
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const struct sram_channel *audio_ch =
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&cx25821_sram_channels[AUDIO_SRAM_CHANNEL];
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u32 tmp = 0;
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/* enable output on the GPIO 0 for the MCLK ADC (Audio) */
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cx25821_set_gpiopin_direction(chip->dev, 0, 0);
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/* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
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cx_clear(AUD_INT_DMA_CTL,
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FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
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/* setup fifo + format - out channel */
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cx25821_sram_channel_setup_audio(chip->dev, audio_ch, buf->bpl,
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buf->risc.dma);
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/* sets bpl size */
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cx_write(AUD_A_LNGTH, buf->bpl);
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/* reset counter */
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/* GP_COUNT_CONTROL_RESET = 0x3 */
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cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
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atomic_set(&chip->count, 0);
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/* Set the input mode to 16-bit */
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tmp = cx_read(AUD_A_CFG);
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cx_write(AUD_A_CFG, tmp | FLD_AUD_DST_PK_MODE | FLD_AUD_DST_ENABLE |
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FLD_AUD_CLK_ENABLE);
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/*
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pr_info("DEBUG: Start audio DMA, %d B/line, cmds_start(0x%x)= %d lines/FIFO, %d periods, %d byte buffer\n",
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buf->bpl, audio_ch->cmds_start,
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cx_read(audio_ch->cmds_start + 12)>>1,
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chip->num_periods, buf->bpl * chip->num_periods);
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*/
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/* Enables corresponding bits at AUD_INT_STAT */
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cx_write(AUD_A_INT_MSK, FLD_AUD_DST_RISCI1 | FLD_AUD_DST_OF |
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FLD_AUD_DST_SYNC | FLD_AUD_DST_OPC_ERR);
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/* Clean any pending interrupt bits already set */
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cx_write(AUD_A_INT_STAT, ~0);
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/* enable audio irqs */
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cx_set(PCI_INT_MSK, chip->dev->pci_irqmask | PCI_MSK_AUD_INT);
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/* Turn on audio downstream fifo and risc enable 0x101 */
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tmp = cx_read(AUD_INT_DMA_CTL);
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cx_set(AUD_INT_DMA_CTL, tmp |
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(FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN));
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mdelay(100);
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return 0;
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}
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/*
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* BOARD Specific: Resets audio DMA
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*/
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static int _cx25821_stop_audio_dma(struct cx25821_audio_dev *chip)
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{
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struct cx25821_dev *dev = chip->dev;
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/* stop dma */
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cx_clear(AUD_INT_DMA_CTL,
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FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
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/* disable irqs */
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cx_clear(PCI_INT_MSK, PCI_MSK_AUD_INT);
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cx_clear(AUD_A_INT_MSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
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AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);
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return 0;
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}
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#define MAX_IRQ_LOOP 50
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/*
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* BOARD Specific: IRQ dma bits
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*/
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static char *cx25821_aud_irqs[32] = {
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"dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
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NULL, /* reserved */
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"dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
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NULL, /* reserved */
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"dnf_of", "upf_uf", "rds_dnf_uf", /* 8-10 */
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NULL, /* reserved */
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"dn_sync", "up_sync", "rds_dn_sync", /* 12-14 */
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NULL, /* reserved */
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"opc_err", "par_err", "rip_err", /* 16-18 */
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"pci_abort", "ber_irq", "mchg_irq" /* 19-21 */
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};
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/*
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* BOARD Specific: Threats IRQ audio specific calls
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*/
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static void cx25821_aud_irq(struct cx25821_audio_dev *chip, u32 status,
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u32 mask)
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{
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struct cx25821_dev *dev = chip->dev;
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if (0 == (status & mask))
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return;
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cx_write(AUD_A_INT_STAT, status);
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if (debug > 1 || (status & mask & ~0xff))
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cx25821_print_irqbits(dev->name, "irq aud", cx25821_aud_irqs,
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ARRAY_SIZE(cx25821_aud_irqs), status, mask);
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/* risc op code error */
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if (status & AUD_INT_OPC_ERR) {
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pr_warn("WARNING %s/1: Audio risc op code error\n", dev->name);
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cx_clear(AUD_INT_DMA_CTL,
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FLD_AUD_DST_A_RISC_EN | FLD_AUD_DST_A_FIFO_EN);
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cx25821_sram_channel_dump_audio(dev,
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&cx25821_sram_channels[AUDIO_SRAM_CHANNEL]);
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}
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if (status & AUD_INT_DN_SYNC) {
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pr_warn("WARNING %s: Downstream sync error!\n", dev->name);
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cx_write(AUD_A_GPCNT_CTL, GP_COUNT_CONTROL_RESET);
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return;
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}
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/* risc1 downstream */
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if (status & AUD_INT_DN_RISCI1) {
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atomic_set(&chip->count, cx_read(AUD_A_GPCNT));
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snd_pcm_period_elapsed(chip->substream);
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}
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}
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/*
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* BOARD Specific: Handles IRQ calls
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*/
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static irqreturn_t cx25821_irq(int irq, void *dev_id)
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{
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struct cx25821_audio_dev *chip = dev_id;
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struct cx25821_dev *dev = chip->dev;
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u32 status, pci_status;
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u32 audint_status, audint_mask;
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int loop, handled = 0;
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audint_status = cx_read(AUD_A_INT_STAT);
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audint_mask = cx_read(AUD_A_INT_MSK);
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status = cx_read(PCI_INT_STAT);
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for (loop = 0; loop < 1; loop++) {
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status = cx_read(PCI_INT_STAT);
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if (0 == status) {
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status = cx_read(PCI_INT_STAT);
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audint_status = cx_read(AUD_A_INT_STAT);
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audint_mask = cx_read(AUD_A_INT_MSK);
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if (status) {
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handled = 1;
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cx_write(PCI_INT_STAT, status);
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cx25821_aud_irq(chip, audint_status,
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audint_mask);
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break;
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} else {
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goto out;
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}
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}
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handled = 1;
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cx_write(PCI_INT_STAT, status);
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cx25821_aud_irq(chip, audint_status, audint_mask);
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}
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pci_status = cx_read(PCI_INT_STAT);
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if (handled)
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cx_write(PCI_INT_STAT, pci_status);
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out:
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return IRQ_RETVAL(handled);
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}
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static int dsp_buffer_free(struct cx25821_audio_dev *chip)
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{
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struct cx25821_riscmem *risc = &chip->buf->risc;
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BUG_ON(!chip->dma_size);
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dprintk(2, "Freeing buffer\n");
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cx25821_alsa_dma_unmap(chip);
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cx25821_alsa_dma_free(chip->buf);
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pci_free_consistent(chip->pci, risc->size, risc->cpu, risc->dma);
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kfree(chip->buf);
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chip->buf = NULL;
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chip->dma_size = 0;
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return 0;
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}
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/****************************************************************************
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ALSA PCM Interface
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****************************************************************************/
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/*
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* Digital hardware definition
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*/
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#define DEFAULT_FIFO_SIZE 384
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static const struct snd_pcm_hardware snd_cx25821_digital_hw = {
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.info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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.rates = SNDRV_PCM_RATE_48000,
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.rate_min = 48000,
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.rate_max = 48000,
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.channels_min = 2,
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.channels_max = 2,
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/* Analog audio output will be full of clicks and pops if there
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are not exactly four lines in the SRAM FIFO buffer. */
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.period_bytes_min = DEFAULT_FIFO_SIZE / 3,
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.period_bytes_max = DEFAULT_FIFO_SIZE / 3,
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.periods_min = 1,
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.periods_max = AUDIO_LINE_SIZE,
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/* 128 * 128 = 16384 = 1024 * 16 */
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.buffer_bytes_max = (AUDIO_LINE_SIZE * AUDIO_LINE_SIZE),
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};
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/*
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* audio pcm capture open callback
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*/
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static int snd_cx25821_pcm_open(struct snd_pcm_substream *substream)
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{
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struct cx25821_audio_dev *chip = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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int err;
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unsigned int bpl = 0;
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if (!chip) {
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pr_err("DEBUG: cx25821 can't find device struct. Can't proceed with open\n");
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return -ENODEV;
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}
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err = snd_pcm_hw_constraint_pow2(runtime, 0,
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SNDRV_PCM_HW_PARAM_PERIODS);
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if (err < 0)
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goto _error;
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chip->substream = substream;
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runtime->hw = snd_cx25821_digital_hw;
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if (cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size !=
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DEFAULT_FIFO_SIZE) {
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/* since there are 3 audio Clusters */
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bpl = cx25821_sram_channels[AUDIO_SRAM_CHANNEL].fifo_size / 3;
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bpl &= ~7; /* must be multiple of 8 */
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if (bpl > AUDIO_LINE_SIZE)
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bpl = AUDIO_LINE_SIZE;
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runtime->hw.period_bytes_min = bpl;
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runtime->hw.period_bytes_max = bpl;
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}
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return 0;
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_error:
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dprintk(1, "Error opening PCM!\n");
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return err;
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}
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/*
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* 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 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;
|
|
chip->buf = buf;
|
|
|
|
ret = cx25821_alsa_dma_init(chip,
|
|
(PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
ret = cx25821_alsa_dma_map(chip);
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
ret = cx25821_risc_databuffer_audio(chip->pci, &buf->risc, buf->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 */
|
|
|
|
substream->runtime->dma_area = chip->buf->vaddr;
|
|
substream->runtime->dma_bytes = chip->dma_size;
|
|
substream->runtime->dma_addr = 0;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
chip->buf = NULL;
|
|
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 const 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;
|
|
strscpy(pcm->name, name, sizeof(pcm->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 const struct pci_device_id __maybe_unused cx25821_audio_pci_tbl[] = {
|
|
{0x14f1, 0x0920, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
|
|
{0,}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl);
|
|
|
|
/*
|
|
* 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_new(&dev->pci->dev, 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;
|
|
}
|
|
|
|
strscpy(card->driver, "cx25821", sizeof(card->driver));
|
|
|
|
/* Card "creation" */
|
|
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;
|
|
}
|
|
|
|
strscpy(card->shortname, "cx25821", sizeof(card->shortname));
|
|
sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name,
|
|
chip->iobase, chip->irq);
|
|
strscpy(card->mixername, "CX25821", sizeof(card->mixername));
|
|
|
|
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;
|
|
}
|
|
|
|
dev->card = card;
|
|
devno++;
|
|
return 0;
|
|
|
|
error:
|
|
snd_card_free(card);
|
|
return err;
|
|
}
|
|
|
|
/****************************************************************************
|
|
LINUX MODULE INIT
|
|
****************************************************************************/
|
|
|
|
static int cx25821_alsa_exit_callback(struct device *dev, void *data)
|
|
{
|
|
struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
|
|
struct cx25821_dev *cxdev = get_cx25821(v4l2_dev);
|
|
|
|
snd_card_free(cxdev->card);
|
|
return 0;
|
|
}
|
|
|
|
static void cx25821_audio_fini(void)
|
|
{
|
|
struct device_driver *drv = driver_find("cx25821", &pci_bus_type);
|
|
int ret;
|
|
|
|
ret = driver_for_each_device(drv, NULL, NULL, cx25821_alsa_exit_callback);
|
|
if (ret)
|
|
pr_err("%s failed to find a cx25821 driver.\n", __func__);
|
|
}
|
|
|
|
static int cx25821_alsa_init_callback(struct device *dev, void *data)
|
|
{
|
|
struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
|
|
struct cx25821_dev *cxdev = get_cx25821(v4l2_dev);
|
|
|
|
cx25821_audio_initdev(cxdev);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Module initializer
|
|
*
|
|
* Loops through present saa7134 cards, and assigns an ALSA device
|
|
* to each one
|
|
*
|
|
*/
|
|
static int cx25821_alsa_init(void)
|
|
{
|
|
struct device_driver *drv = driver_find("cx25821", &pci_bus_type);
|
|
|
|
return driver_for_each_device(drv, NULL, NULL, cx25821_alsa_init_callback);
|
|
|
|
}
|
|
|
|
late_initcall(cx25821_alsa_init);
|
|
module_exit(cx25821_audio_fini);
|