/* * Driver for the Conexant CX25821 PCIe bridge * * Copyright (C) 2009 Conexant Systems Inc. * Authors , * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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: */