static int aes_dma_stop(struct aes_hwa_ctx *ctx)
{
struct tf_crypto_aes_operation_state *state =
crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(ctx->req));
int err = 0;
size_t count;
dprintk(KERN_INFO "aes_dma_stop(%p)\n", ctx);
tf_aes_save_registers(state);
if (!AES_CTRL_IS_MODE_ECB(state->CTRL)) {
u32 *ptr = (u32 *) ctx->req->info;
ptr[0] = state->AES_IV_0;
ptr[1] = state->AES_IV_1;
ptr[2] = state->AES_IV_2;
ptr[3] = state->AES_IV_3;
}
OUTREG32(&paes_reg->AES_SYSCONFIG, 0);
omap_stop_dma(ctx->dma_lch_in);
omap_stop_dma(ctx->dma_lch_out);
tf_crypto_disable_clock(PUBLIC_CRYPTO_AES1_CLOCK_REG);
if (!(ctx->flags & FLAGS_FAST)) {
dma_sync_single_for_device(NULL, ctx->dma_addr_out,
ctx->dma_size, DMA_FROM_DEVICE);
#ifdef CONFIG_TF_DRIVER_FAULT_INJECTION
tf_aes_fault_injection(paes_reg->AES_CTRL, ctx->buf_out);
#endif
/* Copy data */
count = sg_copy(&ctx->out_sg, &ctx->out_offset, ctx->buf_out,
ctx->buflen, ctx->dma_size, 1);
if (count != ctx->dma_size)
err = -EINVAL;
} else {
dma_unmap_sg(NULL, ctx->out_sg, 1, DMA_FROM_DEVICE);
dma_unmap_sg(NULL, ctx->in_sg, 1, DMA_TO_DEVICE);
#ifdef CONFIG_TF_DRIVER_FAULT_INJECTION
tf_aes_fault_injection(paes_reg->AES_CTRL,
sg_virt(ctx->out_sg));
#endif
}
if (err || !ctx->total)
ctx->req->base.complete(&ctx->req->base, err);
return err;
}
static int omap_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct omap_runtime_data *prtd = runtime->private_data;
struct omap_pcm_dma_data *dma_data = prtd->dma_data;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&prtd->lock, flags);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
prtd->period_index = 0;
/* Configure McBSP internal buffer usage */
if (dma_data->set_threshold)
dma_data->set_threshold(substream);
omap_start_dma(prtd->dma_ch);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
prtd->period_index = -1;
omap_stop_dma(prtd->dma_ch);
#if 0 // orig
/* Since we are using self linking, there is a
chance that the DMA as re-enabled the channel
just after disabling it */
while (omap_get_dma_active_status(prtd->dma_ch))
omap_stop_dma(prtd->dma_ch);
#else // [email protected], TI patch error in the recording
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
/* Fix: Ensure that the DMA channel is stopped
for self linked audio DMA channel */
while (omap_get_dma_active_status(prtd->dma_ch))
omap_stop_dma(prtd->dma_ch);
}
#endif
break;
default:
ret = -EINVAL;
}
spin_unlock_irqrestore(&prtd->lock, flags);
return ret;
}
static void uart_tx_dma_callback(int lch, u16 ch_status, void *data)
{
struct uart_omap_port *up = (struct uart_omap_port *)data;
struct circ_buf *xmit = &up->port.info->xmit;
xmit->tail = (xmit->tail + up->uart_dma.tx_buf_size) & (UART_XMIT_SIZE - 1);
up->port.icount.tx += up->uart_dma.tx_buf_size;
/* Revisit: Not sure about the below two steps. Seen some instabilities
* with them. might not be needed in the DMA path
*/
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(&up->port);
if (uart_circ_empty(xmit)) {
spin_lock(&(up->uart_dma.tx_lock));
serial_omap_stop_tx(&up->port);
up->uart_dma.tx_dma_state = 0;
spin_unlock(&(up->uart_dma.tx_lock));
} else {
omap_stop_dma(up->uart_dma.tx_dma_channel);
serial_omap_continue_tx(up);
}
isr8250_activity = jiffies;
return;
}
static void serial_omap_stop_tx(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
struct omap_uart_port_info *pdata = up->pdev->dev.platform_data;
if (up->use_dma &&
up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) {
if (omap_get_dma_active_status(up->uart_dma.tx_dma_channel))
return;
omap_stop_dma(up->uart_dma.tx_dma_channel);
omap_free_dma(up->uart_dma.tx_dma_channel);
up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE;
pm_runtime_mark_last_busy(&up->pdev->dev);
pm_runtime_put_autosuspend(&up->pdev->dev);
}
pm_runtime_get_sync(&up->pdev->dev);
if (up->ier & UART_IER_THRI) {
up->ier &= ~UART_IER_THRI;
serial_out(up, UART_IER, up->ier);
}
if (!up->use_dma && pdata && pdata->set_forceidle)
pdata->set_forceidle(up->pdev);
pm_runtime_mark_last_busy(&up->pdev->dev);
pm_runtime_put_autosuspend(&up->pdev->dev);
}
static int omap_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct omap_runtime_data *prtd = runtime->private_data;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&prtd->lock, flags);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
prtd->period_index = 0;
omap_start_dma(prtd->dma_ch);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
prtd->period_index = -1;
omap_stop_dma(prtd->dma_ch);
break;
default:
ret = -EINVAL;
}
spin_unlock_irqrestore(&prtd->lock, flags);
return ret;
}
/*
* omap24xxx_timeout_isr
* Looks at DMA destination register and calls receive
* callback if the destination register is the same on
* two timer isr.
*/
static void
omap24xx_timeout_isr(unsigned long uart_no)
{
u32 w = 0;
int lch;
int curr_pos;
static int prev_pos = 0;
struct omap24xx_uart *hsuart = &ui[uart_no];
FN_IN;
lch = hsuart->rx_dma_channel;
curr_pos = omap_get_dma_dst_pos(lch);
if ((curr_pos == prev_pos) && (curr_pos != hsuart->rx_buf_dma_phys)) {
omap_stop_dma(lch);
w = OMAP_DMA_CSR_REG(lch);
uart_rx_dma_callback(lch, w, uart_cb[hsuart->uart_no].dev);
prev_pos = 0;
}
else {
prev_pos = curr_pos;
mod_timer(&hsuart->timer, jiffies +
msecs_to_jiffies(hsuart->timeout));
}
FN_OUT(0);
}
static void serial_omap_stop_tx(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
if (up->use_dma &&
up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) {
/*
* Check if dma is still active. If yes do nothing,
* return. Else stop dma
*/
if (omap_get_dma_active_status(up->uart_dma.tx_dma_channel))
return;
omap_stop_dma(up->uart_dma.tx_dma_channel);
omap_free_dma(up->uart_dma.tx_dma_channel);
up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE;
pm_runtime_mark_last_busy(&up->pdev->dev);
pm_runtime_put_autosuspend(&up->pdev->dev);
}
pm_runtime_get_sync(&up->pdev->dev);
if (up->ier & UART_IER_THRI) {
up->ier &= ~UART_IER_THRI;
serial_out(up, UART_IER, up->ier);
}
pm_runtime_mark_last_busy(&up->pdev->dev);
pm_runtime_put_autosuspend(&up->pdev->dev);
}
static void serial_omap_stop_tx(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
if (up->use_dma) {
if (up->uart_dma.tx_dma_channel != 0xFF) {
/*
* Check if dma is still active . If yes do nothing , return.
* Else stop dma
*/
int status = omap_readl(OMAP34XX_DMA4_BASE + OMAP_DMA4_CCR(up->uart_dma.tx_dma_channel));
if (status & (1 << 7))
return;
omap_stop_dma(up->uart_dma.tx_dma_channel);
omap_free_dma(up->uart_dma.tx_dma_channel);
up->uart_dma.tx_dma_channel = 0xFF;
}
}
if (up->ier & UART_IER_THRI) {
up->ier &= ~UART_IER_THRI;
serial_out(up, UART_IER, up->ier);
}
#ifdef CONFIG_OMAP3_PM
if (!up->uart_dma.rx_dma_state) {
unsigned int tmp;
tmp = (serial_in(up, UART_OMAP_SYSC) & 0x7) | (2 << 3);
serial_out(up, UART_OMAP_SYSC, tmp); /* smart-idle */
}
#endif
}
static void suspend_capture(struct omap1_cam_dev *pcdev)
{
u32 ctrlclock = CAM_READ_CACHE(pcdev, CTRLCLOCK);
CAM_WRITE(pcdev, CTRLCLOCK, ctrlclock & ~LCLK_EN);
omap_stop_dma(pcdev->dma_ch);
}
int omap_free_sound_dma(void *data, int **channels)
{
int i;
int *chan = NULL;
FN_IN;
if (unlikely(NULL == channels)) {
BUG();
return -EPERM;
}
if (unlikely(NULL == *channels)) {
BUG();
return -EPERM;
}
chan = (*channels);
if (!cpu_is_omap1510())
omap_sound_dma_unlink_lch(data);
for (i = 0; i < nr_linked_channels; i++) {
int cur_chan = chan[i];
omap_stop_dma(cur_chan);
omap_free_dma(cur_chan);
}
kfree(*channels);
*channels = NULL;
FN_OUT(0);
return 0;
}
static void serial_omap_stop_tx(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
if (up->use_dma &&
up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) {
/*
* Check if dma is still active. If yes do nothing,
* return. Else stop dma
*/
if (omap_get_dma_active_status(up->uart_dma.tx_dma_channel))
return;
omap_stop_dma(up->uart_dma.tx_dma_channel);
omap_free_dma(up->uart_dma.tx_dma_channel);
up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE;
}
if (!(up->rs485.flags & SER_RS485_ENABLED)) {
serial_omap_disable_ier_thri(up);
return;
}
up->tx_wait_end = 1;
serial_omap_thri_mode(up);
serial_omap_enable_ier_thri(up);
}
static void serial_omap_stop_tx(struct uart_port *port)
{
struct uart_omap_port *up = (struct uart_omap_port *)port;
if (up->use_dma &&
up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) {
/*
* Check if dma is still active. If yes do nothing,
* return. Else stop dma
*/
if (omap_get_dma_active_status(up->uart_dma.tx_dma_channel))
return;
omap_stop_dma(up->uart_dma.tx_dma_channel);
omap_free_dma(up->uart_dma.tx_dma_channel);
up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE;
serial_omap_port_disable(up);
}
serial_omap_port_enable(up);
if (up->ier & UART_IER_THRI) {
up->ier &= ~UART_IER_THRI;
serial_out(up, UART_IER, up->ier);
}
serial_omap_port_disable(up);
}
/* DMA TX callback - calling when frame transfer has been finished */
static void omap_irda_tx_dma_callback(int lch, u16 ch_status, void *data)
{
struct net_device *dev = data;
struct omap_irda *omap_ir = netdev_priv(dev);
/*Stop DMA controller */
omap_stop_dma(omap_ir->tx_dma_channel);
}
static void serial_omap_stop_rxdma(struct uart_omap_port *up)
{
if (up->uart_dma.rx_dma_used) {
del_timer(&up->uart_dma.rx_timer);
omap_stop_dma(up->uart_dma.rx_dma_channel);
omap_free_dma(up->uart_dma.rx_dma_channel);
up->uart_dma.rx_dma_channel = OMAP_UART_DMA_CH_FREE;
up->uart_dma.rx_dma_used = false;
}
}
static void serial_omap_stop_rxdma(struct uart_omap_port *up)
{
if (up->uart_dma.rx_dma_state) {
del_timer(&up->uart_dma.rx_timer);
omap_stop_dma(up->uart_dma.rx_dma_channel);
omap_free_dma(up->uart_dma.rx_dma_channel);
up->uart_dma.rx_dma_channel = 0xFF;
up->uart_dma.rx_dma_state = 0x0;
}
}
static int omap_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct omap_runtime_data *prtd = runtime->private_data;
struct omap_pcm_dma_data *dma_data = prtd->dma_data;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&prtd->lock, flags);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
prtd->period_index = 0;
/* Configure McBSP internal buffer usage */
if (dma_data->set_threshold)
dma_data->set_threshold(substream);
omap_start_dma(prtd->dma_ch);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
prtd->period_index = -1;
omap_stop_dma(prtd->dma_ch);
if (cpu_is_omap44xx()) {
/* Since we are using self linking, there is a
chance that the DMA as re-enabled the channel
just after disabling it */
while (omap_get_dma_active_status(prtd->dma_ch))
omap_stop_dma(prtd->dma_ch);
}
break;
default:
ret = -EINVAL;
}
spin_unlock_irqrestore(&prtd->lock, flags);
return ret;
}
static void serial_omap_stop_rxdma(struct uart_omap_port *up)
{
if (up->uart_dma.rx_dma_used) {
del_timer(&up->uart_dma.rx_timer);
omap_stop_dma(up->uart_dma.rx_dma_channel);
omap_free_dma(up->uart_dma.rx_dma_channel);
up->uart_dma.rx_dma_channel = OMAP_UART_DMA_CH_FREE;
up->uart_dma.rx_dma_used = false;
pm_runtime_mark_last_busy(&up->pdev->dev);
pm_runtime_put_autosuspend(&up->pdev->dev);
}
}
static void omap1610_irda_tx_dma_callback(int lch, u16 ch_status, void *data)
{
struct net_device *dev = data;
struct omap1610_irda *si = dev->priv;
__ECHO_IN;
/*Stop DMA controller */
omap_stop_dma(si->tx_dma_channel);
__ECHO_OUT;
}
static void abe_dbg_stop_dma(struct omap_abe *abe)
{
/* Since we are using self linking, there is a
chance that the DMA as re-enabled the channel just after disabling it */
while (omap_get_dma_active_status(abe->debugfs.dma_ch))
omap_stop_dma(abe->debugfs.dma_ch);
if (abe->debugfs.circular)
omap_dma_unlink_lch(abe->debugfs.dma_ch, abe->debugfs.dma_ch);
omap_free_dma(abe->debugfs.dma_ch);
pm_runtime_put_sync(abe->dev);
}
static int dma_channel_abort(struct dma_channel *channel)
{
struct musb_dma_channel *musb_channel = channel->private_data;
void __iomem *mbase = musb_channel->controller->base;
u8 bchannel = musb_channel->idx;
int offset;
u16 csr;
if (channel->status == MUSB_DMA_STATUS_BUSY) {
if (musb_channel->transmit) {
offset = MUSB_EP_OFFSET(musb_channel->epnum,
MUSB_TXCSR);
/*
* The programming guide says that we must clear
* the DMAENAB bit before the DMAMODE bit...
*/
csr = musb_readw(mbase, offset);
csr &= ~(MUSB_TXCSR_AUTOSET | MUSB_TXCSR_DMAENAB);
musb_writew(mbase, offset, csr);
csr &= ~MUSB_TXCSR_DMAMODE;
musb_writew(mbase, offset, csr);
} else {
if (musb_channel->sysdma_channel != -1)
omap_stop_dma(musb_channel->sysdma_channel);
offset = MUSB_EP_OFFSET(musb_channel->epnum,
MUSB_RXCSR);
csr = musb_readw(mbase, offset);
csr &= ~(MUSB_RXCSR_AUTOCLEAR |
MUSB_RXCSR_DMAENAB |
MUSB_RXCSR_DMAMODE);
musb_writew(mbase, offset, csr);
}
musb_writew(mbase,
MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_CONTROL),
0);
musb_write_hsdma_addr(mbase, bchannel, 0);
musb_write_hsdma_count(mbase, bchannel, 0);
channel->status = MUSB_DMA_STATUS_FREE;
}
return 0;
}
/***************************************************************************************
*
* Stop all the DMA channels of the stream
*
**************************************************************************************/
void audio_stop_dma(audio_stream_t * s)
{
int *chan = s->lch;
int i;
FN_IN;
if (unlikely(NULL == chan)) {
BUG();
return;
}
for (i = 0; i < nr_linked_channels; i++) {
int cur_chan = chan[i];
omap_stop_dma(cur_chan);
}
s->started = 0;
FN_OUT(0);
return;
}
/* ISRs have to be short and smart.. So we transfer every heavy duty stuff to the
* work item
*/
static void sound_dma_irq_handler(int sound_curr_lch, u16 ch_status, void *data)
{
int dma_status = ch_status;
audio_stream_t *s = (audio_stream_t *) data;
FN_IN;
#ifdef IRQ_TRACE
xyz[h++] = '0' + sound_curr_lch;
if (h == MAX_UP - 1) {
printk("%s-", xyz);
h = 0;
}
#endif
DPRINTK("lch=%d,status=0x%x, dma_status=%d, data=%p\n", sound_curr_lch,
ch_status, dma_status, data);
if (dma_status & (DCSR_ERROR)) {
if (cpu_is_omap15xx() || cpu_is_omap16xx())
omap_stop_dma(sound_curr_lch);
ERR("DCSR_ERROR!\n");
FN_OUT(-1);
return;
}
if (AUDIO_QUEUE_LAST(s))
audio_stop_dma(s);
/* Start the work item - we ping pong the work items */
if (!work_item_running) {
work1.current_lch = sound_curr_lch;
work1.ch_status = ch_status;
work1.s = s;
/* schedule tasklet 1 */
tasklet_schedule(&audio_isr_work1);
work_item_running = 1;
} else {
work2.current_lch = sound_curr_lch;
work2.ch_status = ch_status;
work2.s = s;
/* schedule tasklet 2 */
tasklet_schedule(&audio_isr_work2);
work_item_running = 0;
}
FN_OUT(0);
return;
}
static int dma_channel_abort(struct dma_channel *channel)
{
struct musb_dma_channel *musb_channel = channel->private_data;
void __iomem *mbase = musb_channel->controller->base;
u8 bchannel = musb_channel->idx;
u16 csr;
if (channel->status == MUSB_DMA_STATUS_BUSY) {
if (musb_channel->transmit) {
csr = musb_readw(mbase,
MUSB_EP_OFFSET(musb_channel->epnum,
MUSB_TXCSR));
csr &= ~(MUSB_TXCSR_AUTOSET |
MUSB_TXCSR_DMAENAB |
MUSB_TXCSR_DMAMODE);
musb_writew(mbase,
MUSB_EP_OFFSET(musb_channel->epnum, MUSB_TXCSR),
csr);
} else {
if (musb_channel->sysdma_channel != -1)
omap_stop_dma(musb_channel->sysdma_channel);
csr = musb_readw(mbase,
MUSB_EP_OFFSET(musb_channel->epnum,
MUSB_RXCSR));
csr &= ~(MUSB_RXCSR_AUTOCLEAR |
MUSB_RXCSR_DMAENAB |
MUSB_RXCSR_DMAMODE);
musb_writew(mbase,
MUSB_EP_OFFSET(musb_channel->epnum, MUSB_RXCSR),
csr);
}
musb_writew(mbase,
MUSB_HSDMA_CHANNEL_OFFSET(bchannel, MUSB_HSDMA_CONTROL),
0);
musb_write_hsdma_addr(mbase, bchannel, 0);
musb_write_hsdma_count(mbase, bchannel, 0);
channel->status = MUSB_DMA_STATUS_FREE;
}
return 0;
}
/*
* Stop all the DMA channels of the stream
*/
void omap_stop_alsa_sound_dma(struct audio_stream *s)
{
int *chan = s->lch;
int i;
FN_IN;
if (unlikely(NULL == chan)) {
BUG();
return -1;
}
for (i = 0; i < nr_linked_channels; i++) {
int cur_chan = chan[i];
omap_stop_dma(cur_chan);
}
s->started = 0;
FN_OUT(0);
return 0;
}
static void
mmc_omap_release_dma(struct mmc_omap_host *host, struct mmc_data *data,
int abort)
{
enum dma_data_direction dma_data_dir;
BUG_ON(host->dma_ch < 0);
if (data->error)
omap_stop_dma(host->dma_ch);
/* Release DMA channel lazily */
mod_timer(&host->dma_timer, jiffies + HZ);
if (data->flags & MMC_DATA_WRITE)
dma_data_dir = DMA_TO_DEVICE;
else
dma_data_dir = DMA_FROM_DEVICE;
dma_unmap_sg(mmc_dev(host->mmc), data->sg, host->sg_len,
dma_data_dir);
}
static void hist_dma_cb(int lch, u16 ch_status, void *data)
{
struct ispstat *hist = data;
if (ch_status & ~OMAP_DMA_BLOCK_IRQ) {
dev_dbg(hist->isp->dev, "hist: DMA error. status = 0x%04x\n",
ch_status);
omap_stop_dma(lch);
hist_reset_mem(hist);
atomic_set(&hist->buf_err, 1);
}
isp_reg_clr(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT,
ISPHIST_CNT_CLEAR);
omap3isp_stat_dma_isr(hist);
if (hist->state != ISPSTAT_DISABLED)
omap3isp_hist_dma_done(hist->isp);
}
static void dma_channel_release(struct dma_channel *channel)
{
struct musb_dma_channel *musb_channel = channel->private_data;
channel->actual_len = 0;
musb_channel->start_addr = 0;
musb_channel->len = 0;
musb_channel->controller->used_channels &=
~(1 << musb_channel->idx);
channel->status = MUSB_DMA_STATUS_UNKNOWN;
if (musb_channel->sysdma_channel != -1) {
omap_stop_dma(musb_channel->sysdma_channel);
omap_free_dma(musb_channel->sysdma_channel);
musb_channel->sysdma_channel = -1;
}
}
static int tusb_omap_dma_abort(struct dma_channel *channel)
{
struct tusb_omap_dma_ch *chdat = to_chdat(channel);
struct tusb_omap_dma *tusb_dma = chdat->tusb_dma;
if (!tusb_dma->multichannel) {
if (tusb_dma->ch >= 0) {
omap_stop_dma(tusb_dma->ch);
omap_free_dma(tusb_dma->ch);
tusb_dma->ch = -1;
}
tusb_dma->dmareq = -1;
tusb_dma->sync_dev = -1;
}
channel->status = MUSB_DMA_STATUS_FREE;
return 0;
}
/*
* ISRs have to be short and smart..
* Here we call alsa handling, after some error checking
*/
static void sound_dma_irq_handler(int sound_curr_lch, u16 ch_status,
void *data)
{
int dma_status = ch_status;
struct audio_stream *s = (struct audio_stream *) data;
FN_IN;
/* some register checking */
DPRINTK("lch=%d,status=0x%x, dma_status=%d, data=%p\n",
sound_curr_lch, ch_status, dma_status, data);
if (dma_status & (DCSR_ERROR)) {
omap_stop_dma(sound_curr_lch);
ERR("DCSR_ERROR!\n");
FN_OUT(-1);
return;
}
if (ch_status & DCSR_END_BLOCK)
callback_omap_alsa_sound_dma(s);
FN_OUT(0);
return;
}
static void uart_tx_dma_callback(int lch, u16 ch_status, void *data)
{
struct uart_omap_port *up = (struct uart_omap_port *)data;
struct circ_buf *xmit = &up->port.state->xmit;
xmit->tail = (xmit->tail + up->uart_dma.tx_buf_size) & \
(UART_XMIT_SIZE - 1);
up->port.icount.tx += up->uart_dma.tx_buf_size;
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(&up->port);
if (uart_circ_empty(xmit)) {
spin_lock(&(up->uart_dma.tx_lock));
serial_omap_stop_tx(&up->port);
up->uart_dma.tx_dma_used = false;
spin_unlock(&(up->uart_dma.tx_lock));
if (up->plat_hold_wakelock)
(up->plat_hold_wakelock(up, WAKELK_TX));
} else {
#ifdef CONFIG_PM
/*
* This will enable the clock for some reason if the
* clocks get disabled. This would enable the ICK also
* in case if the Idle state is set and the PRCM modul
* just shutdown the ICK because of inactivity.
*/
omap_uart_enable_clock_from_irq(up->pdev->id);
#endif
omap_stop_dma(up->uart_dma.tx_dma_channel);
serial_omap_continue_tx(up);
}
up->port_activity = jiffies;
return;
}