diff options
Diffstat (limited to 'target/linux/ubicom32/files/sound/ubicom32/ubi32-pcm.c')
| -rw-r--r-- | target/linux/ubicom32/files/sound/ubicom32/ubi32-pcm.c | 711 |
1 files changed, 711 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/sound/ubicom32/ubi32-pcm.c b/target/linux/ubicom32/files/sound/ubicom32/ubi32-pcm.c new file mode 100644 index 000000000..2bc300b85 --- /dev/null +++ b/target/linux/ubicom32/files/sound/ubicom32/ubi32-pcm.c @@ -0,0 +1,711 @@ +/* + * sound/ubicom32/ubi32-pcm.c + * Interface to ubicom32 virtual audio peripheral + * + * (C) Copyright 2009, Ubicom, Inc. + * + * This file is part of the Ubicom32 Linux Kernel Port. + * + * The Ubicom32 Linux Kernel Port 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. + * + * The Ubicom32 Linux Kernel Port 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 the Ubicom32 Linux Kernel Port. If not, + * see <http://www.gnu.org/licenses/>. + * + * Ubicom32 implementation derived from (with many thanks): + * arch/m68knommu + * arch/blackfin + * arch/parisc + */ + +#include <linux/interrupt.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <asm/ip5000.h> +#include <asm/ubi32-pcm.h> +#include <linux/dma-mapping.h> +#include <linux/delay.h> +#include "ubi32.h" + +struct ubi32_snd_runtime_data { + dma_addr_t dma_buffer; /* Physical address of DMA buffer */ + dma_addr_t dma_buffer_end; /* First address beyond end of DMA buffer */ + size_t period_size; + dma_addr_t period_ptr; /* Physical address of next period */ + unsigned int flags; +}; + +static void snd_ubi32_vp_int_set(struct snd_pcm *pcm) +{ + struct ubi32_snd_priv *ubi32_priv = pcm->private_data; + ubi32_priv->ar->int_req |= (1 << ubi32_priv->irq_idx); + ubicom32_set_interrupt(ubi32_priv->tx_irq); +} + +static snd_pcm_uframes_t snd_ubi32_pcm_pointer(struct snd_pcm_substream *substream) +{ + + struct ubi32_snd_priv *ubi32_priv = snd_pcm_substream_chip(substream); + struct audio_dev_regs *adr = ubi32_priv->adr; + struct snd_pcm_runtime *runtime = substream->runtime; + struct ubi32_snd_runtime_data *ubi32_rd = substream->runtime->private_data; + + dma_addr_t read_pos; + + snd_pcm_uframes_t frames; + if (!adr->primary_os_buffer_ptr) { + /* + * If primary_os_buffer_ptr is NULL (e.g. right after the HW is started or + * when the HW is stopped), then handle this case separately. + */ + return 0; + } + + read_pos = (dma_addr_t)adr->primary_os_buffer_ptr; + frames = bytes_to_frames(runtime, read_pos - ubi32_rd->dma_buffer); + if (frames == runtime->buffer_size) { + frames = 0; + } + return frames; +} + +/* + * Audio trigger + */ +static int snd_ubi32_pcm_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct ubi32_snd_priv *ubi32_priv = substream->pcm->private_data; + struct audio_dev_regs *adr = ubi32_priv->adr; + struct ubi32_snd_runtime_data *ubi32_rd = substream->runtime->private_data; + int ret = 0; + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "snd_ubi32_pcm_trigger cmd=%d=", cmd); +#endif + + if (adr->command != AUDIO_CMD_NONE) { + snd_printk(KERN_WARNING "Can't send command to audio device at this time\n"); + // Set a timer to call this function back later. How to do this? + return 0; + } + + /* + * Set interrupt flag to indicate that we interrupted audio device + * to send a command + */ + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "START\n"); +#endif + /* + * Ready the DMA transfer + */ + ubi32_rd->period_ptr = ubi32_rd->dma_buffer; + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "trigger period_ptr=%lx\n", (unsigned long)ubi32_rd->period_ptr); +#endif + adr->dma_xfer_requests[0].ptr = (void *)ubi32_rd->period_ptr; + adr->dma_xfer_requests[0].ctr = ubi32_rd->period_size; + adr->dma_xfer_requests[0].active = 1; + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "xfer_request 0 ptr=0x%x ctr=%u\n", ubi32_rd->period_ptr, ubi32_rd->period_size); +#endif + + ubi32_rd->period_ptr += ubi32_rd->period_size; + adr->dma_xfer_requests[1].ptr = (void *)ubi32_rd->period_ptr; + adr->dma_xfer_requests[1].ctr = ubi32_rd->period_size; + adr->dma_xfer_requests[1].active = 1; + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "xfer_request 1 ptr=0x%x ctr=%u\n", ubi32_rd->period_ptr, ubi32_rd->period_size); +#endif + + /* + * Tell the VP that we want to begin playback by filling in the + * command field and then interrupting the audio VP + */ + adr->int_flags |= AUDIO_INT_FLAG_COMMAND; + adr->command = AUDIO_CMD_START; + snd_ubi32_vp_int_set(substream->pcm); + break; + + case SNDRV_PCM_TRIGGER_STOP: + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "STOP\n"); +#endif + + /* + * Tell the VP that we want to stop playback by filling in the + * command field and then interrupting the audio VP + */ + adr->int_flags |= AUDIO_INT_FLAG_COMMAND; + adr->command = AUDIO_CMD_STOP; + snd_ubi32_vp_int_set(substream->pcm); + break; + + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "PAUSE_PUSH\n"); +#endif + + /* + * Tell the VP that we want to pause playback by filling in the + * command field and then interrupting the audio VP + */ + adr->int_flags |= AUDIO_INT_FLAG_COMMAND; + adr->command = AUDIO_CMD_PAUSE; + snd_ubi32_vp_int_set(substream->pcm); + break; + + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "PAUSE_RELEASE\n"); +#endif + /* + * Tell the VP that we want to resume paused playback by filling + * in the command field and then interrupting the audio VP + */ + adr->int_flags |= AUDIO_INT_FLAG_COMMAND; + adr->command = AUDIO_CMD_RESUME; + snd_ubi32_vp_int_set(substream->pcm); + break; + + default: + snd_printk(KERN_WARNING "Unhandled trigger\n"); + ret = -EINVAL; + break; + } + + return ret; +} + +/* + * Prepare to transfer an audio stream to the codec + */ +static int snd_ubi32_pcm_prepare(struct snd_pcm_substream *substream) +{ + /* + * Configure registers and setup the runtime instance for DMA transfers + */ + struct ubi32_snd_priv *ubi32_priv = substream->pcm->private_data; + struct audio_dev_regs *adr = ubi32_priv->adr; + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "snd_ubi32_pcm_prepare: sending STOP command to audio device\n"); +#endif + + /* + * Make sure the audio device is stopped + */ + + /* + * Set interrupt flag to indicate that we interrupted audio device + * to send a command + */ + adr->int_flags |= AUDIO_INT_FLAG_COMMAND; + adr->command = AUDIO_CMD_STOP; + snd_ubi32_vp_int_set(substream->pcm); + + return 0; +} + +/* + * Allocate DMA buffers from preallocated memory. + * Preallocation was done in snd_ubi32_pcm_new() + */ +static int snd_ubi32_pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct ubi32_snd_priv *ubi32_priv = substream->pcm->private_data; + struct audio_dev_regs *adr = ubi32_priv->adr; + struct ubi32_snd_runtime_data *ubi32_rd = substream->runtime->private_data; + + /* + * Use pre-allocated memory from ubi32_snd_pcm_new() to satisfy + * this memory request. + */ + int ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); + if (ret < 0) { + return ret; + } + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "snd_ubi32_pcm_hw_params\n"); +#endif + + if (!(adr->channel_mask & (1 << params_channels(hw_params)))) { + snd_printk(KERN_INFO "snd_ubi32_pcm_hw_params unsupported number of channels %d mask %08x\n", params_channels(hw_params), adr->channel_mask); + return -EINVAL; + } + + if (ubi32_priv->set_channels) { + int ret = ubi32_priv->set_channels(ubi32_priv, params_channels(hw_params)); + if (ret) { + snd_printk(KERN_WARNING "Unable to set channels to %d, ret=%d\n", params_channels(hw_params), ret); + return ret; + } + } + + if (ubi32_priv->set_rate) { + int ret = ubi32_priv->set_rate(ubi32_priv, params_rate(hw_params)); + if (ret) { + snd_printk(KERN_WARNING "Unable to set rate to %d, ret=%d\n", params_rate(hw_params), ret); + return ret; + } + } + + if (ubi32_priv->pdata->set_rate) { + int ret = ubi32_priv->pdata->set_rate(ubi32_priv->pdata->appdata, params_rate(hw_params)); + if (ret) { + snd_printk(KERN_WARNING "Unable to set rate to %d, ret=%d\n", params_rate(hw_params), ret); + return ret; + } + } + + if (adr->command != AUDIO_CMD_NONE) { + snd_printk(KERN_WARNING "snd_ubi32_pcm_hw_params: tio busy\n"); + return -EAGAIN; + } + + if (params_format(hw_params) == SNDRV_PCM_FORMAT_S16_LE) { + adr->flags |= CMD_START_FLAG_LE; + } else { + adr->flags &= ~CMD_START_FLAG_LE; + } + adr->channels = params_channels(hw_params); + adr->sample_rate = params_rate(hw_params); + adr->command = AUDIO_CMD_SETUP; + adr->int_flags |= AUDIO_INT_FLAG_COMMAND; + snd_ubi32_vp_int_set(substream->pcm); + + /* + * Wait for the command to complete + */ + while (adr->command != AUDIO_CMD_NONE) { + udelay(1); + } + + /* + * Put the DMA info into the DMA descriptor that we will + * use to do transfers to our audio VP "hardware" + */ + + /* + * Mark both DMA transfers as not ready/inactive + */ + adr->dma_xfer_requests[0].active = 0; + adr->dma_xfer_requests[1].active = 0; + + /* + * Put the location of the buffer into the runtime data instance + */ + ubi32_rd->dma_buffer = (dma_addr_t)runtime->dma_area; + ubi32_rd->dma_buffer_end = (dma_addr_t)(runtime->dma_area + runtime->dma_bytes); + + /* + * Get the period size + */ + ubi32_rd->period_size = params_period_bytes(hw_params); + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "DMA for ubi32 audio initialized dma_area=0x%x dma_bytes=%d, period_size=%d\n", (unsigned int)runtime->dma_area, (unsigned int)runtime->dma_bytes, ubi32_rd->period_size); + snd_printk(KERN_INFO "Private buffer ubi32_rd: dma_buffer=0x%x dma_buffer_end=0x%x ret=%d\n", ubi32_rd->dma_buffer, ubi32_rd->dma_buffer_end, ret); +#endif + + return ret; +} + +/* + * This is the reverse of snd_ubi32_pcm_hw_params + */ +static int snd_ubi32_pcm_hw_free(struct snd_pcm_substream *substream) +{ +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "snd_ubi32_pcm_hw_free\n"); +#endif + return snd_pcm_lib_free_pages(substream); +} + +/* + * Audio virtual peripheral capabilities (capture and playback are identical) + */ +static struct snd_pcm_hardware snd_ubi32_pcm_hw = +{ + .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME), + .buffer_bytes_max = (64*1024), + .period_bytes_min = 64, + .period_bytes_max = 8184,//8184,//8176, + .periods_min = 2, + .periods_max = 255, + .fifo_size = 0, // THIS IS IGNORED BY ALSA +}; + +/* + * We fill this in later + */ +static struct snd_pcm_hw_constraint_list ubi32_pcm_rates; + +/* + * snd_ubi32_pcm_close + */ +static int snd_ubi32_pcm_close(struct snd_pcm_substream *substream) +{ + /* Disable codec, stop DMA, free private data structures */ + //struct ubi32_snd_priv *ubi32_priv = snd_pcm_substream_chip(substream); + struct ubi32_snd_runtime_data *ubi32_rd = substream->runtime->private_data; + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "snd_ubi32_pcm_close\n"); +#endif + + substream->runtime->private_data = NULL; + + kfree(ubi32_rd); + + return 0; +} + +/* + * snd_ubi32_pcm_open + */ +static int snd_ubi32_pcm_open(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct ubi32_snd_runtime_data *ubi32_rd; + int ret = 0; + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "ubi32 pcm open\n"); +#endif + + /* Associate capabilities with component */ + runtime->hw = snd_ubi32_pcm_hw; + + /* + * Inform ALSA about constraints of the audio device + */ + ret = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &ubi32_pcm_rates); + if (ret < 0) { + snd_printk(KERN_INFO "invalid rate\n"); + goto out; + } + + /* Force the buffer size to be an integer multiple of period size */ + ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); + if (ret < 0) { + snd_printk(KERN_INFO "invalid period\n"); + goto out; + } + /* Initialize structures/registers */ + ubi32_rd = kzalloc(sizeof(struct ubi32_snd_runtime_data), GFP_KERNEL); + if (ubi32_rd == NULL) { + ret = -ENOMEM; + goto out; + } + + runtime->private_data = ubi32_rd; + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "snd_ubi32_pcm_open returned 0\n"); +#endif + + return 0; +out: +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "snd_ubi32_pcm_open returned %d\n", ret); +#endif + + return ret; +} + +static struct snd_pcm_ops snd_ubi32_pcm_ops = { + .open = snd_ubi32_pcm_open, /* Open */ + .close = snd_ubi32_pcm_close, /* Close */ + .ioctl = snd_pcm_lib_ioctl, /* Generic IOCTL handler */ + .hw_params = snd_ubi32_pcm_hw_params, /* Hardware parameters/capabilities */ + .hw_free = snd_ubi32_pcm_hw_free, /* Free function for hw_params */ + .prepare = snd_ubi32_pcm_prepare, + .trigger = snd_ubi32_pcm_trigger, + .pointer = snd_ubi32_pcm_pointer, +}; + +/* + * Interrupt handler that gets called when the audio device + * interrupts Linux + */ +static irqreturn_t snd_ubi32_pcm_interrupt(int irq, void *appdata) +{ + struct snd_pcm *pcm = (struct snd_pcm *)appdata; + struct ubi32_snd_priv *ubi32_priv = pcm->private_data; + struct audio_dev_regs *adr = ubi32_priv->adr; + struct snd_pcm_substream *substream; + struct ubi32_snd_runtime_data *ubi32_rd; + int dma_to_fill = 0; + + /* + * Check to see if the interrupt is for us + */ + if (!(ubi32_priv->ar->int_status & (1 << ubi32_priv->irq_idx))) { + return IRQ_NONE; + } + + /* + * Clear the interrupt + */ + ubi32_priv->ar->int_status &= ~(1 << ubi32_priv->irq_idx); + + /* + * We only have one stream since we don't mix. Therefore + * we don't need to search through substreams. + */ + if (ubi32_priv->is_capture) { + substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; + } else { + substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; + } + + if (!substream->runtime) { + snd_printk(KERN_WARNING "No runtime data\n"); + return IRQ_NONE; + } + + ubi32_rd = substream->runtime->private_data; + +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "Ubi32 ALSA interrupt\n"); +#endif + + if (ubi32_rd == NULL) { + snd_printk(KERN_WARNING "No private data\n"); + return IRQ_NONE; + } + + // Check interrupt cause + if (0) { + // Handle the underflow case + } else if ((adr->status & AUDIO_STATUS_PLAY_DMA0_REQUEST) || + (adr->status & AUDIO_STATUS_PLAY_DMA1_REQUEST)) { + if (adr->status & AUDIO_STATUS_PLAY_DMA0_REQUEST) { + dma_to_fill = 0; + adr->status &= ~AUDIO_STATUS_PLAY_DMA0_REQUEST; + } else if (adr->status & AUDIO_STATUS_PLAY_DMA1_REQUEST) { + dma_to_fill = 1; + adr->status &= ~AUDIO_STATUS_PLAY_DMA1_REQUEST; + } + ubi32_rd->period_ptr += ubi32_rd->period_size; + if (ubi32_rd->period_ptr >= ubi32_rd->dma_buffer_end) { + ubi32_rd->period_ptr = ubi32_rd->dma_buffer; + } + adr->dma_xfer_requests[dma_to_fill].ptr = (void *)ubi32_rd->period_ptr; + adr->dma_xfer_requests[dma_to_fill].ctr = ubi32_rd->period_size; + adr->dma_xfer_requests[dma_to_fill].active = 1; +#ifdef CONFIG_SND_DEBUG + snd_printk(KERN_INFO "xfer_request %d ptr=0x%x ctr=%u\n", dma_to_fill, ubi32_rd->period_ptr, ubi32_rd->period_size); +#endif + adr->int_flags |= AUDIO_INT_FLAG_MORE_SAMPLES; + snd_ubi32_vp_int_set(substream->pcm); + } + // If we are interrupted by the VP, that means we completed + // processing one period of audio. We need to inform the upper + // layers of ALSA of this. + snd_pcm_period_elapsed(substream); + + return IRQ_HANDLED; +} + +void __devexit snd_ubi32_pcm_remove(struct ubi32_snd_priv *ubi32_priv) +{ + struct snd_pcm *pcm = ubi32_priv->pcm; + free_irq(ubi32_priv->rx_irq, pcm); +} + +#if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12 +#error "Change this table to match pcm.h" +#endif +static unsigned int rates[] __initdata = {5512, 8000, 11025, 16000, 22050, + 32000, 44100, 48000, 64000, 88200, + 96000, 176400, 192000}; + +/* + * snd_ubi32_pcm_probe + */ +int __devinit snd_ubi32_pcm_probe(struct ubi32_snd_priv *ubi32_priv, struct platform_device *pdev) +{ + struct snd_pcm *pcm; + int ret, err; + int i; + int j; + int nrates; + unsigned int rate_max = 0; + unsigned int rate_min = 0xFFFFFFFF; + unsigned int rate_mask = 0; + struct audio_dev_regs *adr; + struct resource *res_adr; + struct resource *res_irq_tx; + struct resource *res_irq_rx; + struct ubi32pcm_platform_data *pdata; + + pdata = pdev->dev.platform_data; + if (!pdata) { + return -ENODEV; + } + + /* + * Get our resources, adr is the hardware driver base address + * and the tx and rx irqs are used to communicate with the + * hardware driver. + */ + res_adr = platform_get_resource(pdev, IORESOURCE_MEM, AUDIO_MEM_RESOURCE); + res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, AUDIO_TX_IRQ_RESOURCE); + res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, AUDIO_RX_IRQ_RESOURCE); + if (!res_adr || !res_irq_tx || !res_irq_rx) { + snd_printk(KERN_WARNING "Could not get resources"); + return -ENODEV; + } + + ubi32_priv->ar = (struct audio_regs *)res_adr->start; + ubi32_priv->tx_irq = res_irq_tx->start; + ubi32_priv->rx_irq = res_irq_rx->start; + ubi32_priv->irq_idx = pdata->inst_num; + ubi32_priv->adr = &(ubi32_priv->ar->adr[pdata->inst_num]); + + /* + * Check the version + */ + adr = ubi32_priv->adr; + if (adr->version != AUDIO_DEV_REGS_VERSION) { + snd_printk(KERN_WARNING "This audio_dev_reg is not compatible with this driver\n"); + return -ENODEV; + } + + /* + * Find out the standard rates, also find max and min rates + */ + for (i = 0; i < ARRAY_SIZE(rates); i++) { + int found = 0; + for (j = 0; j < adr->n_sample_rates; j++) { + if (rates[i] == adr->sample_rates[j]) { + /* + * Check to see if it is supported by the dac + */ + if ((rates[i] >= ubi32_priv->min_sample_rate) && + (!ubi32_priv->max_sample_rate || + (ubi32_priv->max_sample_rate && (rates[i] <= ubi32_priv->max_sample_rate)))) { + found = 1; + rate_mask |= (1 << i); + nrates++; + if (rates[i] < rate_min) { + rate_min = rates[i]; + } + if (rates[i] > rate_max) { + rate_max = rates[i]; + } + break; + } + } + } + if (!found) { + rate_mask |= SNDRV_PCM_RATE_KNOT; + } + } + + snd_ubi32_pcm_hw.rates = rate_mask; + snd_ubi32_pcm_hw.rate_min = rate_min; + snd_ubi32_pcm_hw.rate_max = rate_max; + ubi32_pcm_rates.count = adr->n_sample_rates; + ubi32_pcm_rates.list = (unsigned int *)adr->sample_rates; + ubi32_pcm_rates.mask = 0; + + for (i = 0; i < 32; i++) { + if (adr->channel_mask & (1 << i)) { + if (!snd_ubi32_pcm_hw.channels_min) { + snd_ubi32_pcm_hw.channels_min = i; + } + snd_ubi32_pcm_hw.channels_max = i; + } + } + snd_printk(KERN_INFO "Ubi32PCM: channels_min:%u channels_max:%u\n", + snd_ubi32_pcm_hw.channels_min, + snd_ubi32_pcm_hw.channels_max); + + if (adr->caps & AUDIONODE_CAP_BE) { + snd_ubi32_pcm_hw.formats |= SNDRV_PCM_FMTBIT_S16_BE; + } + if (adr->caps & AUDIONODE_CAP_LE) { + snd_ubi32_pcm_hw.formats |= SNDRV_PCM_FMTBIT_S16_LE; + } + + snd_printk(KERN_INFO "Ubi32PCM: rates:%08x min:%u max:%u count:%d fmts:%016llx (%s)\n", + snd_ubi32_pcm_hw.rates, + snd_ubi32_pcm_hw.rate_min, + snd_ubi32_pcm_hw.rate_max, + ubi32_pcm_rates.count, + snd_ubi32_pcm_hw.formats, + ubi32_priv->is_capture ? "capture" : "playback"); + + if (ubi32_priv->is_capture) { + ret = snd_pcm_new(ubi32_priv->card, "Ubi32 PCM", 0, 0, 1, &pcm); + } else { + ret = snd_pcm_new(ubi32_priv->card, "Ubi32 PCM", 0, 1, 0, &pcm); + } + + if (ret < 0) { + return ret; + } + + pcm->private_data = ubi32_priv; + ubi32_priv->pcm = pcm; + ubi32_priv->pdata = pdata; + + pcm->info_flags = 0; + + strcpy(pcm->name, "Ubi32-PCM"); + + snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, + snd_dma_continuous_data(GFP_KERNEL), + 45*1024, 64*1024); + + if (ubi32_priv->is_capture) { + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ubi32_pcm_ops); + } else { + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ubi32_pcm_ops); + } + + /* + * Start up the audio device + */ + adr->int_flags |= AUDIO_INT_FLAG_COMMAND; + adr->command = AUDIO_CMD_ENABLE; + snd_ubi32_vp_int_set(pcm); + + /* + * Request IRQ + */ + err = request_irq(ubi32_priv->rx_irq, snd_ubi32_pcm_interrupt, IRQF_SHARED | IRQF_DISABLED, pcm->name, pcm); + if (err) { + snd_printk(KERN_WARNING "request_irq failed: irq=%d err=%d\n", ubi32_priv->rx_irq, err); + return -ENODEV; + } + + return ret; + +} |