static int tegra_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct tegra_runtime_data *prtd;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct tegra_pcm_dma_params * dmap;
int ret = 0;
prtd = kzalloc(sizeof(struct tegra_runtime_data), GFP_KERNEL);
if (prtd == NULL)
return -ENOMEM;
runtime->private_data = prtd;
prtd->substream = substream;
spin_lock_init(&prtd->lock);
dmap = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
if (dmap) {
prtd->dma_req[0].dev = prtd;
prtd->dma_req[1].dev = prtd;
prtd->dma_chan = tegra_dma_allocate_channel(
TEGRA_DMA_MODE_CONTINUOUS_SINGLE,
"pcm");
if (prtd->dma_chan == NULL) {
ret = -ENOMEM;
goto err;
}
}
/* Set HW params now that initialization is complete */
snd_soc_set_runtime_hwparams(substream, &tegra_pcm_hardware);
/* Ensure period size is multiple of 8 */
ret = snd_pcm_hw_constraint_step(runtime, 0,
SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 0x8);
if (ret < 0)
goto err;
/* Ensure that buffer size is a multiple of period size */
ret = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
goto err;
return 0;
err:
if (prtd->dma_chan) {
tegra_dma_free_channel(prtd->dma_chan);
}
kfree(prtd);
return ret;
}
static int tegra_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct tegra_runtime_data *prtd;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct tegra_pcm_dma_params * dmap;
int ret = 0;
prtd = kzalloc(sizeof(struct tegra_runtime_data), GFP_KERNEL);
if (prtd == NULL)
return -ENOMEM;
runtime->private_data = prtd;
prtd->substream = substream;
spin_lock_init(&prtd->lock);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
dmap = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
setup_dma_tx_request(&prtd->dma_req[0], dmap);
setup_dma_tx_request(&prtd->dma_req[1], dmap);
} else {
dmap = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
setup_dma_rx_request(&prtd->dma_req[0], dmap);
setup_dma_rx_request(&prtd->dma_req[1], dmap);
}
prtd->dma_req[0].dev = prtd;
prtd->dma_req[1].dev = prtd;
prtd->dma_chan = tegra_dma_allocate_channel(TEGRA_DMA_MODE_ONESHOT);
if (prtd->dma_chan == NULL) {
ret = -ENOMEM;
goto err;
}
/* */
snd_soc_set_runtime_hwparams(substream, &tegra_pcm_hardware);
/* */
ret = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
goto err;
return 0;
err:
if (prtd->dma_chan) {
tegra_dma_free_channel(prtd->dma_chan);
}
kfree(prtd);
return ret;
}
static int tegra_uart_init_rx_dma(struct tegra_uart_port *t)
{
t->rx_dma = tegra_dma_allocate_channel(TEGRA_DMA_MODE_CONTINUOUS,
"uart_rx_%d", t->uport.line);
if (!t->rx_dma) {
dev_err(t->uport.dev, "%s: failed to allocate RX DMA.\n",
__func__);
return -ENODEV;
}
return 0;
}
static int tegra_init_apb_dma(void)
{
#ifdef CONFIG_TEGRA_SYSTEM_DMA
tegra_apb_dma = tegra_dma_allocate_channel(TEGRA_DMA_MODE_ONESHOT |
TEGRA_DMA_SHARED, "apbio");
if (!tegra_apb_dma) {
pr_err("%s: can not allocate dma channel\n", __func__);
return -ENODEV;
}
tegra_apb_bb = dma_alloc_coherent(NULL, sizeof(u32),
&tegra_apb_bb_phys, GFP_KERNEL);
if (!tegra_apb_bb) {
pr_err("%s: can not allocate bounce buffer\n", __func__);
tegra_dma_free_channel(tegra_apb_dma);
tegra_apb_dma = NULL;
return -ENOMEM;
}
#endif
return 0;
}
static int tegra_uart_init_rx_dma(struct tegra_uart_port *t)
{
dma_addr_t rx_dma_phys;
void *rx_dma_virt;
t->rx_dma = tegra_dma_allocate_channel(TEGRA_DMA_MODE_CONTINUOUS,
"uart_rx_%d", t->uport.line);
if (!t->rx_dma) {
dev_err(t->uport.dev, "%s: failed to allocate RX DMA.\n", __func__);
return -ENODEV;
}
t->rx_dma_req.size = UART_RX_DMA_BUFFER_SIZE;
rx_dma_virt = dma_alloc_coherent(t->uport.dev,
t->rx_dma_req.size, &rx_dma_phys, GFP_KERNEL);
if (!rx_dma_virt) {
dev_err(t->uport.dev, "DMA buffers allocate failed\n");
goto fail;
}
t->rx_dma_req.dest_addr = rx_dma_phys;
t->rx_dma_req.virt_addr = rx_dma_virt;
t->rx_dma_req.source_addr = (unsigned long)t->uport.mapbase;
t->rx_dma_req.source_wrap = 4;
t->rx_dma_req.dest_wrap = 0;
t->rx_dma_req.to_memory = 1;
t->rx_dma_req.source_bus_width = 8;
t->rx_dma_req.dest_bus_width = 32;
t->rx_dma_req.req_sel = dma_req_sel[t->uport.line];
t->rx_dma_req.complete = tegra_rx_dma_complete_callback;
t->rx_dma_req.threshold = tegra_rx_dma_threshold_callback;
t->rx_dma_req.dev = t;
return 0;
fail:
tegra_uart_free_rx_dma(t);
return -ENODEV;
}
static int tegra_startup(struct uart_port *u)
{
struct tegra_uart_port *t = container_of(u,
struct tegra_uart_port, uport);
int ret = 0;
struct tegra_uart_platform_data *pdata;
t = container_of(u, struct tegra_uart_port, uport);
sprintf(t->port_name, "tegra_uart_%d", u->line);
t->use_tx_dma = false;
if (!TX_FORCE_PIO) {
t->tx_dma = tegra_dma_allocate_channel(TEGRA_DMA_MODE_ONESHOT,
"uart_tx_%d", u->line);
if (t->tx_dma)
t->use_tx_dma = true;
else
pr_err("%s: failed to allocate TX DMA.\n", __func__);
}
if (t->use_tx_dma) {
t->tx_dma_req.instance = u->line;
t->tx_dma_req.complete = tegra_tx_dma_complete_callback;
t->tx_dma_req.to_memory = 0;
t->tx_dma_req.dest_addr = (unsigned long)t->uport.mapbase;
t->tx_dma_req.dest_wrap = 4;
t->tx_dma_req.source_wrap = 0;
t->tx_dma_req.source_bus_width = 32;
t->tx_dma_req.dest_bus_width = 8;
t->tx_dma_req.req_sel = dma_req_sel[t->uport.line];
t->tx_dma_req.dev = t;
t->tx_dma_req.size = 0;
t->xmit_dma_addr = dma_map_single(t->uport.dev,
t->uport.state->xmit.buf, UART_XMIT_SIZE,
DMA_TO_DEVICE);
}
t->tx_in_progress = 0;
t->use_rx_dma = false;
if (!RX_FORCE_PIO && t->rx_dma_req.virt_addr) {
if (!tegra_uart_init_rx_dma(t))
t->use_rx_dma = true;
}
ret = tegra_uart_hw_init(t);
if (ret)
goto fail;
if (t->is_irda && t->irda_start)
t->irda_start();
pdata = u->dev->platform_data;
if (pdata && pdata->is_loopback)
t->mcr_shadow |= UART_MCR_LOOP;
dev_dbg(u->dev, "Requesting IRQ %d\n", u->irq);
ret = request_irq(u->irq, tegra_uart_isr,
IRQF_DISABLED | IRQF_TRIGGER_HIGH,
t->port_name, t);
if (ret) {
dev_err(u->dev, "Failed to register ISR for IRQ %d\n", u->irq);
goto fail;
}
dev_dbg(u->dev, "Started UART port %d\n", u->line);
return 0;
fail:
dev_err(u->dev, "Tegra UART startup failed\n");
return ret;
}
static int tegra_pcm_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct tegra_runtime_data *prtd;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct tegra_pcm_dma_params * dmap;
int ret = 0;
prtd = kzalloc(sizeof(struct tegra_runtime_data), GFP_KERNEL);
if (prtd == NULL)
return -ENOMEM;
runtime->private_data = prtd;
prtd->substream = substream;
spin_lock_init(&prtd->lock);
dmap = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
if (dmap) {
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
setup_dma_tx_request(&prtd->dma_req[0], dmap);
setup_dma_tx_request(&prtd->dma_req[1], dmap);
} else {
setup_dma_rx_request(&prtd->dma_req[0], dmap);
setup_dma_rx_request(&prtd->dma_req[1], dmap);
}
prtd->dma_req[0].dev = prtd;
prtd->dma_req[1].dev = prtd;
prtd->dma_chan = tegra_dma_allocate_channel(
TEGRA_DMA_MODE_CONTINUOUS_SINGLE,
"pcm");
if (prtd->dma_chan == NULL) {
ret = -ENOMEM;
goto err;
}
}
/* Set HW params now that initialization is complete */
snd_soc_set_runtime_hwparams(substream, &tegra_pcm_hardware);
/* Ensure period size is multiple of 8 */
ret = snd_pcm_hw_constraint_step(runtime, 0,
SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 0x8);
if (ret < 0)
goto err;
/* Ensure that buffer size is a multiple of period size */
ret = snd_pcm_hw_constraint_integer(runtime,
SNDRV_PCM_HW_PARAM_PERIODS);
if (ret < 0)
goto err;
#ifdef CONFIG_HAS_WAKELOCK
snprintf(prtd->tegra_wake_lock_name, sizeof(prtd->tegra_wake_lock_name),
"tegra-pcm-%s-%d",
(substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? "out" : "in",
substream->pcm->device);
wake_lock_init(&prtd->tegra_wake_lock, WAKE_LOCK_SUSPEND,
prtd->tegra_wake_lock_name);
#endif
return 0;
err:
if (prtd->dma_chan) {
tegra_dma_free_channel(prtd->dma_chan);
}
kfree(prtd);
return ret;
}