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path: root/drivers/serial/sh-sci.c
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Diffstat (limited to 'drivers/serial/sh-sci.c')
-rw-r--r--drivers/serial/sh-sci.c81
1 files changed, 32 insertions, 49 deletions
diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 430754ebac8..a9e07075962 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -482,6 +482,7 @@ static inline void sci_receive_chars(struct uart_port *port,
struct tty_struct *tty = port->info->tty;
int i, count, copied = 0;
unsigned short status;
+ unsigned char flag;
status = sci_in(port, SCxSR);
if (!(status & SCxSR_RDxF(port)))
@@ -499,8 +500,7 @@ static inline void sci_receive_chars(struct uart_port *port,
#endif
/* Don't copy more bytes than there is room for in the buffer */
- if (tty->flip.count + count > TTY_FLIPBUF_SIZE)
- count = TTY_FLIPBUF_SIZE - tty->flip.count;
+ count = tty_buffer_request_room(tty, count);
/* If for any reason we can't copy more data, we're done! */
if (count == 0)
@@ -512,8 +512,7 @@ static inline void sci_receive_chars(struct uart_port *port,
|| uart_handle_sysrq_char(port, c, regs)) {
count = 0;
} else {
- tty->flip.char_buf_ptr[0] = c;
- tty->flip.flag_buf_ptr[0] = TTY_NORMAL;
+ tty_insert_flip_char(tty, c, TTY_NORMAL);
}
} else {
for (i=0; i<count; i++) {
@@ -542,26 +541,21 @@ static inline void sci_receive_chars(struct uart_port *port,
}
/* Store data and status */
- tty->flip.char_buf_ptr[i] = c;
if (status&SCxSR_FER(port)) {
- tty->flip.flag_buf_ptr[i] = TTY_FRAME;
+ flag = TTY_FRAME;
pr_debug("sci: frame error\n");
} else if (status&SCxSR_PER(port)) {
- tty->flip.flag_buf_ptr[i] = TTY_PARITY;
+ flag = TTY_PARITY;
pr_debug("sci: parity error\n");
- } else {
- tty->flip.flag_buf_ptr[i] = TTY_NORMAL;
- }
+ } else
+ flag = TTY_NORMAL;
+ tty_insert_flip_char(tty, c, flag);
}
}
sci_in(port, SCxSR); /* dummy read */
sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
- /* Update the kernel buffer end */
- tty->flip.count += count;
- tty->flip.char_buf_ptr += count;
- tty->flip.flag_buf_ptr += count;
copied += count;
port->icount.rx += count;
}
@@ -608,48 +602,45 @@ static inline int sci_handle_errors(struct uart_port *port)
unsigned short status = sci_in(port, SCxSR);
struct tty_struct *tty = port->info->tty;
- if (status&SCxSR_ORER(port) && tty->flip.count<TTY_FLIPBUF_SIZE) {
+ if (status&SCxSR_ORER(port)) {
/* overrun error */
- copied++;
- *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
+ if(tty_insert_flip_char(tty, 0, TTY_OVERRUN))
+ copied++;
pr_debug("sci: overrun error\n");
}
- if (status&SCxSR_FER(port) && tty->flip.count<TTY_FLIPBUF_SIZE) {
+ if (status&SCxSR_FER(port)) {
if (sci_rxd_in(port) == 0) {
/* Notify of BREAK */
struct sci_port * sci_port = (struct sci_port *)port;
- if(!sci_port->break_flag) {
- sci_port->break_flag = 1;
- sci_schedule_break_timer((struct sci_port *)port);
+ if(!sci_port->break_flag) {
+ sci_port->break_flag = 1;
+ sci_schedule_break_timer((struct sci_port *)port);
/* Do sysrq handling. */
- if(uart_handle_break(port)) {
+ if(uart_handle_break(port))
return 0;
- }
pr_debug("sci: BREAK detected\n");
- copied++;
- *tty->flip.flag_buf_ptr++ = TTY_BREAK;
+ if(tty_insert_flip_char(tty, 0, TTY_BREAK))
+ copied++;
}
}
else {
/* frame error */
- copied++;
- *tty->flip.flag_buf_ptr++ = TTY_FRAME;
+ if(tty_insert_flip_char(tty, 0, TTY_FRAME))
+ copied++;
pr_debug("sci: frame error\n");
}
}
- if (status&SCxSR_PER(port) && tty->flip.count<TTY_FLIPBUF_SIZE) {
+ if (status&SCxSR_PER(port)) {
+ if(tty_insert_flip_char(tty, 0, TTY_PARITY))
+ copied++;
/* parity error */
- copied++;
- *tty->flip.flag_buf_ptr++ = TTY_PARITY;
pr_debug("sci: parity error\n");
}
- if (copied) {
- tty->flip.count += copied;
+ if (copied)
tty_flip_buffer_push(tty);
- }
return copied;
}
@@ -661,15 +652,14 @@ static inline int sci_handle_breaks(struct uart_port *port)
struct tty_struct *tty = port->info->tty;
struct sci_port *s = &sci_ports[port->line];
- if (!s->break_flag && status & SCxSR_BRK(port) &&
- tty->flip.count < TTY_FLIPBUF_SIZE) {
+ if (!s->break_flag && status & SCxSR_BRK(port))
#if defined(CONFIG_CPU_SH3)
/* Debounce break */
s->break_flag = 1;
#endif
/* Notify of BREAK */
- copied++;
- *tty->flip.flag_buf_ptr++ = TTY_BREAK;
+ if(tty_insert_flip_char(tty, 0, TTY_BREAK))
+ copied++;
pr_debug("sci: BREAK detected\n");
}
@@ -677,19 +667,15 @@ static inline int sci_handle_breaks(struct uart_port *port)
/* XXX: Handle SCIF overrun error */
if (port->type == PORT_SCIF && (sci_in(port, SCLSR) & SCIF_ORER) != 0) {
sci_out(port, SCLSR, 0);
- if(tty->flip.count<TTY_FLIPBUF_SIZE) {
+ if(tty_insert_flip_char(tty, 0, TTY_OVERRUN)) {
copied++;
- *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
pr_debug("sci: overrun error\n");
}
}
#endif
- if (copied) {
- tty->flip.count += copied;
+ if (copied)
tty_flip_buffer_push(tty);
- }
-
return copied;
}
@@ -732,12 +718,9 @@ static irqreturn_t sci_er_interrupt(int irq, void *ptr, struct pt_regs *regs)
struct tty_struct *tty = port->info->tty;
sci_out(port, SCLSR, 0);
- if(tty->flip.count<TTY_FLIPBUF_SIZE) {
- *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
- tty->flip.count++;
- tty_flip_buffer_push(tty);
- pr_debug("scif: overrun error\n");
- }
+ tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+ tty_flip_buffer_push(tty);
+ pr_debug("scif: overrun error\n");
}
#endif
sci_rx_interrupt(irq, ptr, regs);
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-12 16:47:26 +0000