--- /dev/null
+/*
+ * 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/pci.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_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
+ ),
+ .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;
+ runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_FRONT_DAC];
+ snd_pcm_limit_hw_rates(runtime);
+ cs5535au->playback_substream = substream;
+ runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
+ 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_le16(period_bytes);
+ desc->ctlreserved = cpu_to_le16(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_le16(PRD_JMP);
+ jmpprd_addr = cpu_to_le32(lastdesc->addr +
+ (sizeof(struct cs5535audio_dma_desc)*periods));
+
+ dma->substream = substream;
+ 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;
+ dma->substream = 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));
+ if (!err)
+ dma->pcm_open_flag = 1;
+
+ 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;
+
+ if (dma->pcm_open_flag) {
+ if (substream == cs5535au->playback_substream)
+ snd_ac97_update_power(cs5535au->ac97,
+ AC97_PCM_FRONT_DAC_RATE, 0);
+ else
+ snd_ac97_update_power(cs5535au->ac97,
+ AC97_PCM_LR_ADC_RATE, 0);
+ dma->pcm_open_flag = 0;
+ }
+ 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);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ dma->ops->disable_dma(cs5535au);
+ break;
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ dma->ops->disable_dma(cs5535au);
+ break;
+ default:
+ dev_err(cs5535au->card->dev, "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) {
+ dev_err(cs5535au->card->dev, "curdma=%x < %x bufaddr.\n",
+ curdma, dma->buf_addr);
+ return 0;
+ }
+ curdma -= dma->buf_addr;
+ if (curdma >= dma->buf_bytes) {
+ dev_err(cs5535au->card->dev, "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;
+ runtime->hw.rates = cs5535au->ac97->rates[AC97_RATES_ADC];
+ snd_pcm_limit_hw_rates(runtime);
+ cs5535au->capture_substream = substream;
+ runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
+ if ((err = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
+ return err;
+ olpc_capture_open(cs5535au->ac97);
+ return 0;
+}
+
+static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
+{
+ struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
+ olpc_capture_close(cs5535au->ac97);
+ 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 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;
+}
+
Code Review / kvmfornfv.git / blobdiff