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 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;
}
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));
} else {
omap_stop_dma(up->uart_dma.tx_dma_channel);
serial_omap_continue_tx(up);
}
up->port_activity = jiffies;
return;
}
