static void musb_sysdma_completion(int lch, u16 ch_status, void *data)
{
u32 addr;
unsigned long flags;
struct dma_channel *channel;
struct musb_dma_channel *musb_channel =
(struct musb_dma_channel *) data;
struct musb_dma_controller *controller = musb_channel->controller;
struct musb *musb = controller->private_data;
channel = &musb_channel->channel;
DBG(2, "lch = 0x%d, ch_status = 0x%x\n", lch, ch_status);
spin_lock_irqsave(&musb->lock, flags);
addr = (u32) omap_get_dma_dst_pos(musb_channel->sysdma_channel);
if (musb_channel->len == 0)
channel->actual_len = 0;
else
channel->actual_len = addr - musb_channel->start_addr;
DBG(2, "ch %p, 0x%x -> 0x%x (%d / %d) %s\n",
channel, musb_channel->start_addr, addr,
channel->actual_len, musb_channel->len,
(channel->actual_len < musb_channel->len) ?
"=> reconfig 0 " : " => complete");
channel->status = MUSB_DMA_STATUS_FREE;
musb_dma_completion(musb, musb_channel->epnum, musb_channel->transmit);
spin_unlock_irqrestore(&musb->lock, flags);
return;
}
/*
* 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 musb_sysdma_completion(int lch, u16 ch_status, void *data)
{
u32 addr;
unsigned long flags;
struct dma_channel *channel;
struct musb_dma_channel *musb_channel =
(struct musb_dma_channel *) data;
struct musb_dma_controller *controller = musb_channel->controller;
struct musb *musb = controller->private_data;
void __iomem *mbase = controller->base;
channel = &musb_channel->channel;
DBG(2, "lch = 0x%d, ch_status = 0x%x\n", lch, ch_status);
spin_lock_irqsave(&musb->lock, flags);
if (musb_channel->transmit)
addr = (u32) omap_get_dma_src_pos(musb_channel->sysdma_channel);
else
addr = (u32) omap_get_dma_dst_pos(musb_channel->sysdma_channel);
if (musb_channel->len == 0)
channel->actual_len = 0;
else
channel->actual_len = addr - musb_channel->start_addr;
DBG(2, "ch %p, 0x%x -> 0x%x (%d / %d) %s\n",
channel, musb_channel->start_addr, addr,
channel->actual_len, musb_channel->len,
(channel->actual_len < musb_channel->len) ?
"=> reconfig 0 " : " => complete");
channel->status = MUSB_DMA_STATUS_FREE;
/* completed */
if ((musb_channel->transmit) && (channel->desired_mode == 0)
&& (channel->actual_len == musb_channel->max_packet_sz)) {
u8 epnum = musb_channel->epnum;
int offset = MUSB_EP_OFFSET(musb, epnum, MUSB_TXCSR);
u16 txcsr;
/*
* The programming guide says that we
* must clear DMAENAB before DMAMODE.
*/
musb_ep_select(musb, mbase, epnum);
txcsr = musb_readw(mbase, offset);
txcsr |= MUSB_TXCSR_TXPKTRDY;
musb_writew(mbase, offset, txcsr);
}
musb_dma_completion(musb, musb_channel->epnum, musb_channel->transmit);
spin_unlock_irqrestore(&musb->lock, flags);
return;
}
static void serial_omap_rxdma_poll(unsigned long uart_no)
{
struct uart_omap_port *up = ui[uart_no];
unsigned int curr_dma_pos, curr_transmitted_size;
int ret = 0;
curr_dma_pos = omap_get_dma_dst_pos(up->uart_dma.rx_dma_channel);
if ((curr_dma_pos == up->uart_dma.prev_rx_dma_pos) ||
(curr_dma_pos == 0)) {
if (jiffies_to_msecs(jiffies - up->port_activity) <
up->uart_dma.rx_timeout) {
mod_timer(&up->uart_dma.rx_timer, jiffies +
usecs_to_jiffies(up->uart_dma.rx_poll_rate));
} else {
serial_omap_stop_rxdma(up);
up->ier |= (UART_IER_RDI | UART_IER_RLSI);
serial_out(up, UART_IER, up->ier);
}
return;
}
curr_transmitted_size = curr_dma_pos -
up->uart_dma.prev_rx_dma_pos;
up->port.icount.rx += curr_transmitted_size;
tty_insert_flip_string(up->port.state->port.tty,
up->uart_dma.rx_buf +
(up->uart_dma.prev_rx_dma_pos -
up->uart_dma.rx_buf_dma_phys),
curr_transmitted_size);
tty_flip_buffer_push(up->port.state->port.tty);
up->uart_dma.prev_rx_dma_pos = curr_dma_pos;
if (up->uart_dma.rx_buf_size +
up->uart_dma.rx_buf_dma_phys == curr_dma_pos) {
ret = serial_omap_start_rxdma(up);
if (ret < 0) {
serial_omap_stop_rxdma(up);
up->ier |= (UART_IER_RDI | UART_IER_RLSI);
serial_out(up, UART_IER, up->ier);
}
} else {
mod_timer(&up->uart_dma.rx_timer, jiffies +
usecs_to_jiffies(up->uart_dma.rx_poll_rate));
}
up->port_activity = jiffies;
}
static snd_pcm_uframes_t omap_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct omap_runtime_data *prtd = runtime->private_data;
dma_addr_t ptr;
snd_pcm_uframes_t offset;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
ptr = omap_get_dma_src_pos(prtd->dma_ch);
else
ptr = omap_get_dma_dst_pos(prtd->dma_ch);
offset = bytes_to_frames(runtime, ptr - runtime->dma_addr);
if (offset >= runtime->buffer_size)
offset = 0;
return offset;
}
static snd_pcm_uframes_t omap_pcm_pointer(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct omap_runtime_data *prtd = runtime->private_data;
dma_addr_t ptr;
snd_pcm_uframes_t offset;
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
ptr = omap_get_dma_dst_pos(prtd->dma_ch);
offset = bytes_to_frames(runtime, ptr - runtime->dma_addr);
} else if (!(cpu_is_omap1510())) {
ptr = omap_get_dma_src_pos(prtd->dma_ch);
offset = bytes_to_frames(runtime, ptr - runtime->dma_addr);
} else
offset = prtd->period_index * runtime->period_size;
if (offset >= runtime->buffer_size)
offset = 0;
return offset;
}
static int abe_dbg_get_dma_pos(struct omap_abe *abe)
{
return omap_get_dma_dst_pos(abe->debugfs.dma_ch) - abe->debugfs.buffer_addr;
}