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serial: sh-sci: Add more register documentation

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Signed-off-by: Geert Uytterhoeven <[email protected]>
Acked-by: Simon Horman <[email protected]>
Acked-by: Laurent Pinchart <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Geert Uytterhoeven 2014-03-11 11:11:19 +01:00 • committed by Greg Kroah-Hartman
commit 26de4f1b2f
2 changed files with 73 additions and 48 deletions
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28
drivers/tty/serial/sh-sci.c
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@ -911,7 +911,7 @@ static irqreturn_t sci_rx_interrupt(int irq, void *ptr)
/* Disable future Rx interrupts */
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
disable_irq_nosync(irq);
scr |= 0x4000;
scr |= SCSCR_RDRQE;
} else {
scr &= ~SCSCR_RIE;
}
@ -1200,7 +1200,9 @@ static void sci_set_mctrl(struct uart_port *port, unsigned int mctrl)
*/
reg = sci_getreg(port, SCFCR);
if (reg->size)
serial_port_out(port, SCFCR, serial_port_in(port, SCFCR) | 1);
serial_port_out(port, SCFCR,
serial_port_in(port, SCFCR) |
SCFCR_LOOP);
}
}
@ -1496,9 +1498,9 @@ static void sci_start_tx(struct uart_port *port)
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
u16 new, scr = serial_port_in(port, SCSCR);
if (s->chan_tx)
new = scr | 0x8000;
new = scr | SCSCR_TDRQE;
else
new = scr & ~0x8000;
new = scr & ~SCSCR_TDRQE;
if (new != scr)
serial_port_out(port, SCSCR, new);
}
@ -1525,7 +1527,7 @@ static void sci_stop_tx(struct uart_port *port)
ctrl = serial_port_in(port, SCSCR);
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
ctrl &= ~0x8000;
ctrl &= ~SCSCR_TDRQE;
ctrl &= ~SCSCR_TIE;
@ -1539,7 +1541,7 @@ static void sci_start_rx(struct uart_port *port)
ctrl = serial_port_in(port, SCSCR) | port_rx_irq_mask(port);
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
ctrl &= ~0x4000;
ctrl &= ~SCSCR_RDRQE;
serial_port_out(port, SCSCR, ctrl);
}
@ -1551,7 +1553,7 @@ static void sci_stop_rx(struct uart_port *port)
ctrl = serial_port_in(port, SCSCR);
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB)
ctrl &= ~0x4000;
ctrl &= ~SCSCR_RDRQE;
ctrl &= ~port_rx_irq_mask(port);
@ -1614,7 +1616,7 @@ static void rx_timer_fn(unsigned long arg)
u16 scr = serial_port_in(port, SCSCR);
if (port->type == PORT_SCIFA || port->type == PORT_SCIFB) {
scr &= ~0x4000;
scr &= ~SCSCR_RDRQE;
enable_irq(s->irqs[SCIx_RXI_IRQ]);
}
serial_port_out(port, SCSCR, scr | SCSCR_RIE);
@ -1871,13 +1873,13 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
smr_val = serial_port_in(port, SCSMR) & 3;
if ((termios->c_cflag & CSIZE) == CS7)
smr_val |= 0x40;
smr_val |= SCSMR_CHR;
if (termios->c_cflag & PARENB)
smr_val |= 0x20;
smr_val |= SCSMR_PE;
if (termios->c_cflag & PARODD)
smr_val |= 0x30;
smr_val |= SCSMR_PE | SCSMR_ODD;
if (termios->c_cflag & CSTOPB)
smr_val |= 0x08;
smr_val |= SCSMR_STOP;
uart_update_timeout(port, termios->c_cflag, baud);
@ -1885,7 +1887,7 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
__func__, smr_val, cks, t, s->cfg->scscr);
if (t >= 0) {
serial_port_out(port, SCSMR, (smr_val & ~3) | cks);
serial_port_out(port, SCSMR, (smr_val & ~SCSMR_CKS) | cks);
serial_port_out(port, SCBRR, t);
reg = sci_getreg(port, HSSRR);
if (reg->size)