/* * Driver for audio on multifunction CS5535 companion device * Copyright (C) Jaya Kumar * * Based on Jaroslav Kysela and Takashi Iwai's examples. * This work was sponsored by CIS(M) Sdn Bhd. * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * todo: add be fmt support, spdif, pm */ #include <linux/init.h> #include <linux/slab.h> #include <linux/pci.h> #include <sound/driver.h> #include <sound/core.h> #include <sound/control.h> #include <sound/initval.h> #include <sound/asoundef.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include <sound/ac97_codec.h> #include "cs5535audio.h" static struct snd_pcm_hardware snd_cs5535audio_playback = { .info = ( SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_SYNC_START | SNDRV_PCM_INFO_RESUME ), .formats = ( SNDRV_PCM_FMTBIT_S16_LE ), .rates = ( SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000 ), .rate_min = 4000, .rate_max = 48000, .channels_min = 2, .channels_max = 2, .buffer_bytes_max = (128*1024), .period_bytes_min = 64, .period_bytes_max = (64*1024 - 16), .periods_min = 1, .periods_max = CS5535AUDIO_MAX_DESCRIPTORS, .fifo_size = 0, }; static struct snd_pcm_hardware snd_cs5535audio_capture = { .info = ( SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START ), .formats = ( SNDRV_PCM_FMTBIT_S16_LE ), .rates = ( SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000 ), .rate_min = 4000, .rate_max = 48000, .channels_min = 2, .channels_max = 2, .buffer_bytes_max = (128*1024), .period_bytes_min = 64, .period_bytes_max = (64*1024 - 16), .periods_min = 1, .periods_max = CS5535AUDIO_MAX_DESCRIPTORS, .fifo_size = 0, }; static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream) { int err; struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; runtime->hw = snd_cs5535audio_playback; cs5535au->playback_substream = substream; runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]); snd_pcm_set_sync(substream); if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) return err; return 0; } static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream) { return 0; } #define CS5535AUDIO_DESC_LIST_SIZE \ PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc)) static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au, struct cs5535audio_dma *dma, struct snd_pcm_substream *substream, unsigned int periods, unsigned int period_bytes) { unsigned int i; u32 addr, desc_addr, jmpprd_addr; struct cs5535audio_dma_desc *lastdesc; if (periods > CS5535AUDIO_MAX_DESCRIPTORS) return -ENOMEM; if (dma->desc_buf.area == NULL) { if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(cs5535au->pci), CS5535AUDIO_DESC_LIST_SIZE+1, &dma->desc_buf) < 0) return -ENOMEM; dma->period_bytes = dma->periods = 0; } if (dma->periods == periods && dma->period_bytes == period_bytes) return 0; /* the u32 cast is okay because in snd*create we successfully told pci alloc that we're only 32 bit capable so the uppper will be 0 */ addr = (u32) substream->runtime->dma_addr; desc_addr = (u32) dma->desc_buf.addr; for (i = 0; i < periods; i++) { struct cs5535audio_dma_desc *desc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i]; desc->addr = cpu_to_le32(addr); desc->size = cpu_to_le32(period_bytes); desc->ctlreserved = cpu_to_le32(PRD_EOP); desc_addr += sizeof(struct cs5535audio_dma_desc); addr += period_bytes; } /* we reserved one dummy descriptor at the end to do the PRD jump */ lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods]; lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr); lastdesc->size = 0; lastdesc->ctlreserved = cpu_to_le32(PRD_JMP); jmpprd_addr = cpu_to_le32(lastdesc->addr + (sizeof(struct cs5535audio_dma_desc)*periods)); dma->period_bytes = period_bytes; dma->periods = periods; spin_lock_irq(&cs5535au->reg_lock); dma->ops->disable_dma(cs5535au); dma->ops->setup_prd(cs5535au, jmpprd_addr); spin_unlock_irq(&cs5535au->reg_lock); return 0; } static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au) { cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN); } static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au) { cs_writeb(cs5535au, ACC_BM0_CMD, 0); } static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au) { cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE); } static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au, u32 prd_addr) { cs_writel(cs5535au, ACC_BM0_PRD, prd_addr); } static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au) { return cs_readl(cs5535au, ACC_BM0_PRD); } static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au) { return cs_readl(cs5535au, ACC_BM0_PNTR); } static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au) { cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN); } static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au) { cs_writeb(cs5535au, ACC_BM1_CMD, 0); } static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au) { cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE); } static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au, u32 prd_addr) { cs_writel(cs5535au, ACC_BM1_PRD, prd_addr); } static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au) { return cs_readl(cs5535au, ACC_BM1_PRD); } static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au) { return cs_readl(cs5535au, ACC_BM1_PNTR); } static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au, struct cs5535audio_dma *dma, struct snd_pcm_substream *substream) { snd_dma_free_pages(&dma->desc_buf); dma->desc_buf.area = NULL; } static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); struct cs5535audio_dma *dma = substream->runtime->private_data; int err; err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); if (err < 0) return err; dma->buf_addr = substream->runtime->dma_addr; dma->buf_bytes = params_buffer_bytes(hw_params); err = cs5535audio_build_dma_packets(cs5535au, dma, substream, params_periods(hw_params), params_period_bytes(hw_params)); return err; } static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream) { struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); struct cs5535audio_dma *dma = substream->runtime->private_data; cs5535audio_clear_dma_packets(cs5535au, dma, substream); return snd_pcm_lib_free_pages(substream); } static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream) { struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE, substream->runtime->rate); } static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd) { struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); struct cs5535audio_dma *dma = substream->runtime->private_data; int err = 0; spin_lock(&cs5535au->reg_lock); switch (cmd) { case SNDRV_PCM_TRIGGER_PAUSE_PUSH: dma->ops->pause_dma(cs5535au); break; case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: dma->ops->enable_dma(cs5535au); break; case SNDRV_PCM_TRIGGER_START: dma->ops->enable_dma(cs5535au); break; case SNDRV_PCM_TRIGGER_RESUME: dma->ops->enable_dma(cs5535au); dma->suspended = 0; break; case SNDRV_PCM_TRIGGER_STOP: dma->ops->disable_dma(cs5535au); break; case SNDRV_PCM_TRIGGER_SUSPEND: dma->ops->disable_dma(cs5535au); dma->suspended = 1; break; default: snd_printk(KERN_ERR "unhandled trigger\n"); err = -EINVAL; break; } spin_unlock(&cs5535au->reg_lock); return err; } static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream *substream) { struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); u32 curdma; struct cs5535audio_dma *dma; dma = substream->runtime->private_data; curdma = dma->ops->read_dma_pntr(cs5535au); if (curdma < dma->buf_addr) { snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n", curdma, dma->buf_addr); return 0; } curdma -= dma->buf_addr; if (curdma >= dma->buf_bytes) { snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n", curdma, dma->buf_bytes); return 0; } return bytes_to_frames(substream->runtime, curdma); } static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream) { int err; struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; runtime->hw = snd_cs5535audio_capture; cs5535au->capture_substream = substream; runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]); snd_pcm_set_sync(substream); if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) return err; return 0; } static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream) { return 0; } static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream) { struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream); return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE, substream->runtime->rate); } static struct snd_pcm_ops snd_cs5535audio_playback_ops = { .open = snd_cs5535audio_playback_open, .close = snd_cs5535audio_playback_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_cs5535audio_hw_params, .hw_free = snd_cs5535audio_hw_free, .prepare = snd_cs5535audio_playback_prepare, .trigger = snd_cs5535audio_trigger, .pointer = snd_cs5535audio_pcm_pointer, }; static struct snd_pcm_ops snd_cs5535audio_capture_ops = { .open = snd_cs5535audio_capture_open, .close = snd_cs5535audio_capture_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_cs5535audio_hw_params, .hw_free = snd_cs5535audio_hw_free, .prepare = snd_cs5535audio_capture_prepare, .trigger = snd_cs5535audio_trigger, .pointer = snd_cs5535audio_pcm_pointer, }; static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = { .type = CS5535AUDIO_DMA_PLAYBACK, .enable_dma = cs5535audio_playback_enable_dma, .disable_dma = cs5535audio_playback_disable_dma, .setup_prd = cs5535audio_playback_setup_prd, .read_prd = cs5535audio_playback_read_prd, .pause_dma = cs5535audio_playback_pause_dma, .read_dma_pntr = cs5535audio_playback_read_dma_pntr, }; static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = { .type = CS5535AUDIO_DMA_CAPTURE, .enable_dma = cs5535audio_capture_enable_dma, .disable_dma = cs5535audio_capture_disable_dma, .setup_prd = cs5535audio_capture_setup_prd, .read_prd = cs5535audio_capture_read_prd, .pause_dma = cs5535audio_capture_pause_dma, .read_dma_pntr = cs5535audio_capture_read_dma_pntr, }; int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au) { struct snd_pcm *pcm; int err; err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm); if (err < 0) return err; cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops = &snd_cs5535audio_playback_dma_ops; cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops = &snd_cs5535audio_capture_dma_ops; snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cs5535audio_playback_ops); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cs5535audio_capture_ops); pcm->private_data = cs5535au; pcm->info_flags = 0; strcpy(pcm->name, "CS5535 Audio"); snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(cs5535au->pci), 64*1024, 128*1024); cs5535au->pcm = pcm; return 0; }