/* * * Support for audio capture * PCI function #1 of the cx2388x. * * (c) 2005,2006 Ricardo Cerqueira * (c) 2005 Mauro Carvalho Chehab * Based on a dummy cx88 module by Gerd Knorr * Based on dummy.c by Jaroslav Kysela * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include #include #include #include #include "cx88.h" #include "cx88-reg.h" #define dprintk(level,fmt, arg...) if (debug >= level) \ printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg) #define dprintk_core(level,fmt, arg...) if (debug >= level) \ printk(KERN_DEBUG "%s/1: " fmt, chip->core->name , ## arg) /**************************************************************************** Data type declarations - Can be moded to a header file later ****************************************************************************/ /* These can be replaced after done */ #define MIXER_ADDR_LAST MAX_CX88_INPUT struct cx88_audio_dev { struct cx88_core *core; struct cx88_dmaqueue q; /* pci i/o */ struct pci_dev *pci; unsigned char pci_rev,pci_lat; /* audio controls */ int irq; struct snd_card *card; spinlock_t reg_lock; unsigned int dma_size; unsigned int period_size; unsigned int num_periods; struct videobuf_dmabuf dma_risc; int mixer_volume[MIXER_ADDR_LAST+1][2]; int capture_source[MIXER_ADDR_LAST+1][2]; long int read_count; long int read_offset; struct cx88_buffer *buf; long opened; struct snd_pcm_substream *substream; }; typedef struct cx88_audio_dev snd_cx88_card_t; /**************************************************************************** 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}; static struct snd_card *snd_cx88_cards[SNDRV_CARDS]; module_param_array(enable, bool, NULL, 0444); MODULE_PARM_DESC(enable, "Enable cx88x soundcard. default enabled."); module_param_array(index, int, NULL, 0444); MODULE_PARM_DESC(index, "Index value for cx88x capture interface(s)."); /**************************************************************************** Module macros ****************************************************************************/ MODULE_DESCRIPTION("ALSA driver module for cx2388x based TV cards"); MODULE_AUTHOR("Ricardo Cerqueira"); MODULE_AUTHOR("Mauro Carvalho Chehab "); MODULE_LICENSE("GPL"); MODULE_SUPPORTED_DEVICE("{{Conexant,23881}," "{{Conexant,23882}," "{{Conexant,23883}"); static unsigned int debug; module_param(debug,int,0644); MODULE_PARM_DESC(debug,"enable debug messages"); /**************************************************************************** Module specific funtions ****************************************************************************/ /* * BOARD Specific: Sets audio DMA */ static int _cx88_start_audio_dma(snd_cx88_card_t *chip) { struct cx88_buffer *buf = chip->buf; struct cx88_core *core=chip->core; struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25]; dprintk(1, "Starting audio DMA for %i bytes/line and %i (%i) lines at address %08x\n",buf->bpl, chip->num_periods, audio_ch->fifo_size / buf->bpl, audio_ch->fifo_start); /* setup fifo + format - out channel */ cx88_sram_channel_setup(chip->core, &cx88_sram_channels[SRAM_CH25], buf->bpl, buf->risc.dma); /* sets bpl size */ cx_write(MO_AUDD_LNGTH, buf->bpl); /* reset counter */ cx_write(MO_AUDD_GPCNTRL,GP_COUNT_CONTROL_RESET); dprintk(1,"Enabling IRQ, setting mask from 0x%x to 0x%x\n",chip->core->pci_irqmask,(chip->core->pci_irqmask | 0x02)); /* enable irqs */ cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | 0x02); /* Enables corresponding bits at AUD_INT_STAT */ cx_write(MO_AUD_INTMSK, (1<<16)| (1<<12)| (1<<4)| (1<<0) ); /* start dma */ cx_set(MO_DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */ cx_set(MO_AUD_DMACNTRL, 0x11); /* audio downstream FIFO and RISC enable */ if (debug) cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]); return 0; } /* * BOARD Specific: Resets audio DMA */ static int _cx88_stop_audio_dma(snd_cx88_card_t *chip) { struct cx88_core *core=chip->core; dprintk(1, "Stopping audio DMA\n"); /* stop dma */ cx_clear(MO_AUD_DMACNTRL, 0x11); /* disable irqs */ cx_clear(MO_PCI_INTMSK, 0x02); cx_clear(MO_AUD_INTMSK, (1<<16)| (1<<12)| (1<<4)| (1<<0) ); if (debug) cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]); return 0; } #define MAX_IRQ_LOOP 10 /* * BOARD Specific: IRQ dma bits */ static char *cx88_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 cx8801_aud_irq(snd_cx88_card_t *chip) { struct cx88_core *core = chip->core; u32 status, mask; u32 count; status = cx_read(MO_AUD_INTSTAT); mask = cx_read(MO_AUD_INTMSK); if (0 == (status & mask)) { spin_unlock(&chip->reg_lock); return; } cx_write(MO_AUD_INTSTAT, status); if (debug > 1 || (status & mask & ~0xff)) cx88_print_irqbits(core->name, "irq aud", cx88_aud_irqs, status, mask); /* risc op code error */ if (status & (1 << 16)) { printk(KERN_WARNING "%s/0: audio risc op code error\n",core->name); cx_clear(MO_AUD_DMACNTRL, 0x11); cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]); } /* risc1 downstream */ if (status & 0x01) { spin_lock(&chip->reg_lock); count = cx_read(MO_AUDD_GPCNT); spin_unlock(&chip->reg_lock); if (chip->read_count == 0) chip->read_count += chip->dma_size; } if (chip->read_count >= chip->period_size) { dprintk(2, "Elapsing period\n"); snd_pcm_period_elapsed(chip->substream); } dprintk(3,"Leaving audio IRQ handler...\n"); /* FIXME: Any other status should deserve a special handling? */ } /* * BOARD Specific: Handles IRQ calls */ static irqreturn_t cx8801_irq(int irq, void *dev_id, struct pt_regs *regs) { snd_cx88_card_t *chip = dev_id; struct cx88_core *core = chip->core; u32 status; int loop, handled = 0; for (loop = 0; loop < MAX_IRQ_LOOP; loop++) { status = cx_read(MO_PCI_INTSTAT) & (core->pci_irqmask | 0x02); if (0 == status) goto out; dprintk( 3, "cx8801_irq\n" ); dprintk( 3, " loop: %d/%d\n", loop, MAX_IRQ_LOOP ); dprintk( 3, " status: %d\n", status ); handled = 1; cx_write(MO_PCI_INTSTAT, status); if (status & 0x02) { dprintk( 2, " ALSA IRQ handling\n" ); cx8801_aud_irq(chip); } }; if (MAX_IRQ_LOOP == loop) { dprintk( 0, "clearing mask\n" ); dprintk(1,"%s/0: irq loop -- clearing mask\n", core->name); cx_clear(MO_PCI_INTMSK,0x02); } out: return IRQ_RETVAL(handled); } static int dsp_buffer_free(snd_cx88_card_t *chip) { BUG_ON(!chip->dma_size); dprintk(2,"Freeing buffer\n"); videobuf_dma_pci_unmap(chip->pci, &chip->dma_risc); videobuf_dma_free(&chip->dma_risc); btcx_riscmem_free(chip->pci,&chip->buf->risc); kfree(chip->buf); chip->dma_size = 0; return 0; } /**************************************************************************** ALSA PCM Interface ****************************************************************************/ /* * Digital hardware definition */ static struct snd_pcm_hardware snd_cx88_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 = 1, .channels_max = 2, .buffer_bytes_max = (2*2048), .period_bytes_min = 2048, .period_bytes_max = 2048, .periods_min = 2, .periods_max = 2, }; /* * audio pcm capture runtime free */ static void snd_card_cx88_runtime_free(struct snd_pcm_runtime *runtime) { } /* * audio pcm capture open callback */ static int snd_cx88_pcm_open(struct snd_pcm_substream *substream) { snd_cx88_card_t *chip = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; int err; if (test_and_set_bit(0, &chip->opened)) return -EBUSY; err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); if (err < 0) goto _error; chip->substream = substream; chip->read_count = 0; chip->read_offset = 0; runtime->private_free = snd_card_cx88_runtime_free; runtime->hw = snd_cx88_digital_hw; return 0; _error: dprintk(1,"Error opening PCM!\n"); clear_bit(0, &chip->opened); smp_mb__after_clear_bit(); return err; } /* * audio close callback */ static int snd_cx88_close(struct snd_pcm_substream *substream) { snd_cx88_card_t *chip = snd_pcm_substream_chip(substream); clear_bit(0, &chip->opened); smp_mb__after_clear_bit(); return 0; } /* * hw_params callback */ static int snd_cx88_hw_params(struct snd_pcm_substream * substream, struct snd_pcm_hw_params * hw_params) { snd_cx88_card_t *chip = snd_pcm_substream_chip(substream); struct cx88_buffer *buf; 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); dprintk(1,"Setting buffer\n"); buf = kmalloc(sizeof(*buf),GFP_KERNEL); if (NULL == buf) return -ENOMEM; memset(buf,0,sizeof(*buf)); buf->vb.memory = V4L2_MEMORY_MMAP; buf->vb.width = chip->period_size; buf->vb.height = chip->num_periods; buf->vb.size = chip->dma_size; buf->vb.field = V4L2_FIELD_NONE; videobuf_dma_init(&buf->vb.dma); videobuf_dma_init_kernel(&buf->vb.dma,PCI_DMA_FROMDEVICE, (PAGE_ALIGN(buf->vb.size) >> PAGE_SHIFT)); videobuf_dma_pci_map(chip->pci,&buf->vb.dma); cx88_risc_databuffer(chip->pci, &buf->risc, buf->vb.dma.sglist, buf->vb.width, buf->vb.height); 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->vb.state = STATE_PREPARED; buf->bpl = chip->period_size; chip->buf = buf; chip->dma_risc = buf->vb.dma; dprintk(1,"Buffer ready at %u\n",chip->dma_risc.nr_pages); substream->runtime->dma_area = chip->dma_risc.vmalloc; return 0; } /* * hw free callback */ static int snd_cx88_hw_free(struct snd_pcm_substream * substream) { snd_cx88_card_t *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_cx88_prepare(struct snd_pcm_substream *substream) { return 0; } /* * trigger callback */ static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd) { snd_cx88_card_t *chip = snd_pcm_substream_chip(substream); int err; spin_lock(&chip->reg_lock); switch (cmd) { case SNDRV_PCM_TRIGGER_START: err=_cx88_start_audio_dma(chip); break; case SNDRV_PCM_TRIGGER_STOP: err=_cx88_stop_audio_dma(chip); break; default: err=-EINVAL; break; } spin_unlock(&chip->reg_lock); return err; } /* * pointer callback */ static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream) { snd_cx88_card_t *chip = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; if (chip->read_count) { chip->read_count -= snd_pcm_lib_period_bytes(substream); chip->read_offset += snd_pcm_lib_period_bytes(substream); if (chip->read_offset == chip->dma_size) chip->read_offset = 0; } dprintk(2, "Pointer time, will return %li, read %li\n",chip->read_offset,chip->read_count); return bytes_to_frames(runtime, chip->read_offset); } /* * operators */ static struct snd_pcm_ops snd_cx88_pcm_ops = { .open = snd_cx88_pcm_open, .close = snd_cx88_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_cx88_hw_params, .hw_free = snd_cx88_hw_free, .prepare = snd_cx88_prepare, .trigger = snd_cx88_card_trigger, .pointer = snd_cx88_pointer, }; /* * create a PCM device */ static int __devinit snd_cx88_pcm(snd_cx88_card_t *chip, int device, char *name) { int err; struct snd_pcm *pcm; err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm); if (err < 0) return err; pcm->private_data = chip; strcpy(pcm->name, name); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops); return 0; } /**************************************************************************** CONTROL INTERFACE ****************************************************************************/ static int snd_cx88_capture_volume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *info) { info->type = SNDRV_CTL_ELEM_TYPE_INTEGER; info->count = 1; info->value.integer.min = 0; info->value.integer.max = 0x3f; return 0; } /* OK - TODO: test it */ static int snd_cx88_capture_volume_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol); struct cx88_core *core=chip->core; value->value.integer.value[0] = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f); return 0; } /* OK - TODO: test it */ static int snd_cx88_capture_volume_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol); struct cx88_core *core=chip->core; int v; u32 old_control; spin_lock_irq(&chip->reg_lock); old_control = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f); v = 0x3f - (value->value.integer.value[0] & 0x3f); cx_andor(AUD_VOL_CTL, 0x3f, v); spin_unlock_irq(&chip->reg_lock); return v != old_control; } static struct snd_kcontrol_new snd_cx88_capture_volume = { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "Capture Volume", .info = snd_cx88_capture_volume_info, .get = snd_cx88_capture_volume_get, .put = snd_cx88_capture_volume_put, }; /**************************************************************************** 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 struct pci_device_id cx88_audio_pci_tbl[] = { {0x14f1,0x8801,PCI_ANY_ID,PCI_ANY_ID,0,0,0}, {0x14f1,0x8811,PCI_ANY_ID,PCI_ANY_ID,0,0,0}, {0, } }; MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl); /* * Chip-specific destructor */ static int snd_cx88_free(snd_cx88_card_t *chip) { if (chip->irq >= 0){ synchronize_irq(chip->irq); free_irq(chip->irq, chip); } cx88_core_put(chip->core,chip->pci); pci_disable_device(chip->pci); return 0; } /* * Component Destructor */ static void snd_cx88_dev_free(struct snd_card * card) { snd_cx88_card_t *chip = card->private_data; snd_cx88_free(chip); } /* * Alsa Constructor - Component probe */ static int devno; static int __devinit snd_cx88_create(struct snd_card *card, struct pci_dev *pci, snd_cx88_card_t **rchip) { snd_cx88_card_t *chip; struct cx88_core *core; int err; *rchip = NULL; err = pci_enable_device(pci); if (err < 0) return err; pci_set_master(pci); chip = (snd_cx88_card_t *) card->private_data; core = cx88_core_get(pci); if (NULL == core) { err = -EINVAL; kfree (chip); return err; } if (!pci_dma_supported(pci,0xffffffff)) { dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n",core->name); err = -EIO; cx88_core_put(core,pci); return err; } /* pci init */ chip->card = card; chip->pci = pci; chip->irq = -1; spin_lock_init(&chip->reg_lock); cx88_reset(core); chip->core = core; /* get irq */ err = request_irq(chip->pci->irq, cx8801_irq, SA_SHIRQ | SA_INTERRUPT, chip->core->name, chip); if (err < 0) { dprintk(0, "%s: can't get IRQ %d\n", chip->core->name, chip->pci->irq); return err; } /* print pci info */ pci_read_config_byte(pci, PCI_CLASS_REVISION, &chip->pci_rev); pci_read_config_byte(pci, PCI_LATENCY_TIMER, &chip->pci_lat); dprintk(1,"ALSA %s/%i: found at %s, rev: %d, irq: %d, " "latency: %d, mmio: 0x%lx\n", core->name, devno, pci_name(pci), chip->pci_rev, pci->irq, chip->pci_lat,pci_resource_start(pci,0)); chip->irq = pci->irq; synchronize_irq(chip->irq); snd_card_set_dev(card, &pci->dev); *rchip = chip; return 0; } static int __devinit cx88_audio_initdev(struct pci_dev *pci, const struct pci_device_id *pci_id) { struct snd_card *card; snd_cx88_card_t *chip; int err; if (devno >= SNDRV_CARDS) return (-ENODEV); if (!enable[devno]) { ++devno; return (-ENOENT); } card = snd_card_new(index[devno], id[devno], THIS_MODULE, sizeof(snd_cx88_card_t)); if (!card) return (-ENOMEM); card->private_free = snd_cx88_dev_free; err = snd_cx88_create(card, pci, &chip); if (err < 0) return (err); err = snd_cx88_pcm(chip, 0, "CX88 Digital"); if (err < 0) { snd_card_free(card); return (err); } err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_capture_volume, chip)); if (err < 0) { snd_card_free(card); return (err); } strcpy (card->driver, "CX88x"); sprintf(card->shortname, "Conexant CX%x", pci->device); sprintf(card->longname, "%s at %#lx", card->shortname, pci_resource_start(pci, 0)); strcpy (card->mixername, "CX88"); dprintk (0, "%s/%i: ALSA support for cx2388x boards\n", card->driver,devno); err = snd_card_register(card); if (err < 0) { snd_card_free(card); return (err); } snd_cx88_cards[devno] = card; pci_set_drvdata(pci,card); devno++; return 0; } /* * ALSA destructor */ static void __devexit cx88_audio_finidev(struct pci_dev *pci) { struct cx88_audio_dev *card = pci_get_drvdata(pci); snd_card_free((void *)card); pci_set_drvdata(pci, NULL); devno--; } /* * PCI driver definition */ static struct pci_driver cx88_audio_pci_driver = { .name = "cx88_audio", .id_table = cx88_audio_pci_tbl, .probe = cx88_audio_initdev, .remove = cx88_audio_finidev, }; /**************************************************************************** LINUX MODULE INIT ****************************************************************************/ /* * module init */ static int cx88_audio_init(void) { printk(KERN_INFO "cx2388x alsa driver version %d.%d.%d loaded\n", (CX88_VERSION_CODE >> 16) & 0xff, (CX88_VERSION_CODE >> 8) & 0xff, CX88_VERSION_CODE & 0xff); #ifdef SNAPSHOT printk(KERN_INFO "cx2388x: snapshot date %04d-%02d-%02d\n", SNAPSHOT/10000, (SNAPSHOT/100)%100, SNAPSHOT%100); #endif return pci_register_driver(&cx88_audio_pci_driver); } /* * module remove */ static void cx88_audio_fini(void) { pci_unregister_driver(&cx88_audio_pci_driver); } module_init(cx88_audio_init); module_exit(cx88_audio_fini); /* ----------------------------------------------------------- */ /* * Local variables: * c-basic-offset: 8 * End: */