diff options
Diffstat (limited to 'drivers/tty/serial/sh-sci.c')
| -rw-r--r-- | drivers/tty/serial/sh-sci.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index ca31e34afd83..f70d06a03864 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -588,12 +588,17 @@ static void sci_start_tx(struct uart_port *port) if (s->chan_tx && !uart_circ_empty(&s->port.state->xmit) && dma_submit_error(s->cookie_tx)) { + if (s->cfg->regtype == SCIx_RZ_SCIFA_REGTYPE) + /* Switch irq from SCIF to DMA */ + disable_irq(s->irqs[SCIx_TXI_IRQ]); + s->cookie_tx = 0; schedule_work(&s->work_tx); } #endif - if (!s->chan_tx || port->type == PORT_SCIFA || port->type == PORT_SCIFB) { + if (!s->chan_tx || s->cfg->regtype == SCIx_RZ_SCIFA_REGTYPE || + port->type == PORT_SCIFA || port->type == PORT_SCIFB) { /* Set TIE (Transmit Interrupt Enable) bit in SCSCR */ ctrl = serial_port_in(port, SCSCR); serial_port_out(port, SCSCR, ctrl | SCSCR_TIE); @@ -1192,9 +1197,15 @@ static void sci_dma_tx_complete(void *arg) schedule_work(&s->work_tx); } else { s->cookie_tx = -EINVAL; - if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) { + if (port->type == PORT_SCIFA || port->type == PORT_SCIFB || + s->cfg->regtype == SCIx_RZ_SCIFA_REGTYPE) { u16 ctrl = serial_port_in(port, SCSCR); serial_port_out(port, SCSCR, ctrl & ~SCSCR_TIE); + if (s->cfg->regtype == SCIx_RZ_SCIFA_REGTYPE) { + /* Switch irq from DMA to SCIF */ + dmaengine_pause(s->chan_tx_saved); + enable_irq(s->irqs[SCIx_TXI_IRQ]); + } } } |