@@ -125,10 +125,6 @@ struct sci_port {
resource_size_t reg_size;
struct mctrl_gpios *gpios;
- /* Break timer */
- struct timer_list break_timer;
- int break_flag;
-
/* Clocks */
struct clk *clks[SCI_NUM_CLKS];
unsigned long clk_rates[SCI_NUM_CLKS];
@@ -517,14 +513,6 @@ static void sci_port_disable(struct sci_port *sci_port)
if (!sci_port->port.dev)
return;
- /* Cancel the break timer to ensure that the timer handler will not try
- * to access the hardware with clocks and power disabled. Reset the
- * break flag to make the break debouncing state machine ready for the
- * next break.
- */
- del_timer_sync(&sci_port->break_timer);
- sci_port->break_flag = 0;
-
for (i = SCI_NUM_CLKS; i-- > 0; )
clk_disable_unprepare(sci_port->clks[i]);
@@ -751,20 +739,6 @@ static int sci_rxfill(struct uart_port *port)
return (serial_port_in(port, SCxSR) & SCxSR_RDxF(port)) != 0;
}
-/*
- * SCI helper for checking the state of the muxed port/RXD pins.
- */
-static inline int sci_rxd_in(struct uart_port *port)
-{
- struct sci_port *s = to_sci_port(port);
-
- if (s->cfg->port_reg <= 0)
- return 1;
-
- /* Cast for ARM damage */
- return !!__raw_readb((void __iomem *)(uintptr_t)s->cfg->port_reg);
-}
-
/* ********************************************************************** *
* the interrupt related routines *
* ********************************************************************** */
@@ -832,7 +806,6 @@ static void sci_transmit_chars(struct uart_port *port)
static void sci_receive_chars(struct uart_port *port)
{
- struct sci_port *sci_port = to_sci_port(port);
struct tty_port *tport = &port->state->port;
int i, count, copied = 0;
unsigned short status;
@@ -852,8 +825,7 @@ static void sci_receive_chars(struct uart_port *port)
if (port->type == PORT_SCI) {
char c = serial_port_in(port, SCxRDR);
- if (uart_handle_sysrq_char(port, c) ||
- sci_port->break_flag)
+ if (uart_handle_sysrq_char(port, c))
count = 0;
else
tty_insert_flip_char(tport, c, TTY_NORMAL);
@@ -862,25 +834,6 @@ static void sci_receive_chars(struct uart_port *port)
char c = serial_port_in(port, SCxRDR);
status = serial_port_in(port, SCxSR);
-#if defined(CONFIG_CPU_SH3)
- /* Skip "chars" during break */
- if (sci_port->break_flag) {
- if ((c == 0) &&
- (status & SCxSR_FER(port))) {
- count--; i--;
- continue;
- }
-
- /* Nonzero => end-of-break */
- dev_dbg(port->dev, "debounce<%02x>\n", c);
- sci_port->break_flag = 0;
-
- if (STEPFN(c)) {
- count--; i--;
- continue;
- }
- }
-#endif /* CONFIG_CPU_SH3 */
if (uart_handle_sysrq_char(port, c)) {
count--; i--;
continue;
@@ -918,37 +871,6 @@ static void sci_receive_chars(struct uart_port *port)
}
}
-#define SCI_BREAK_JIFFIES (HZ/20)
-
-/*
- * The sci generates interrupts during the break,
- * 1 per millisecond or so during the break period, for 9600 baud.
- * So dont bother disabling interrupts.
- * But dont want more than 1 break event.
- * Use a kernel timer to periodically poll the rx line until
- * the break is finished.
- */
-static inline void sci_schedule_break_timer(struct sci_port *port)
-{
- mod_timer(&port->break_timer, jiffies + SCI_BREAK_JIFFIES);
-}
-
-/* Ensure that two consecutive samples find the break over. */
-static void sci_break_timer(unsigned long data)
-{
- struct sci_port *port = (struct sci_port *)data;
-
- if (sci_rxd_in(&port->port) == 0) {
- port->break_flag = 1;
- sci_schedule_break_timer(port);
- } else if (port->break_flag == 1) {
- /* break is over. */
- port->break_flag = 2;
- sci_schedule_break_timer(port);
- } else
- port->break_flag = 0;
-}
-
static int sci_handle_errors(struct uart_port *port)
{
int copied = 0;
@@ -968,35 +890,13 @@ static int sci_handle_errors(struct uart_port *port)
}
if (status & SCxSR_FER(port)) {
- if (sci_rxd_in(port) == 0) {
- /* Notify of BREAK */
- struct sci_port *sci_port = to_sci_port(port);
-
- if (!sci_port->break_flag) {
- port->icount.brk++;
-
- sci_port->break_flag = 1;
- sci_schedule_break_timer(sci_port);
-
- /* Do sysrq handling. */
- if (uart_handle_break(port))
- return 0;
-
- dev_dbg(port->dev, "BREAK detected\n");
-
- if (tty_insert_flip_char(tport, 0, TTY_BREAK))
- copied++;
- }
-
- } else {
- /* frame error */
- port->icount.frame++;
+ /* frame error */
+ port->icount.frame++;
- if (tty_insert_flip_char(tport, 0, TTY_FRAME))
- copied++;
+ if (tty_insert_flip_char(tport, 0, TTY_FRAME))
+ copied++;
- dev_notice(port->dev, "frame error\n");
- }
+ dev_notice(port->dev, "frame error\n");
}
if (status & SCxSR_PER(port)) {
@@ -1049,17 +949,11 @@ static int sci_handle_breaks(struct uart_port *port)
int copied = 0;
unsigned short status = serial_port_in(port, SCxSR);
struct tty_port *tport = &port->state->port;
- struct sci_port *s = to_sci_port(port);
if (uart_handle_break(port))
return 0;
- if (!s->break_flag && status & SCxSR_BRK(port)) {
-#if defined(CONFIG_CPU_SH3)
- /* Debounce break */
- s->break_flag = 1;
-#endif
-
+ if (status & SCxSR_BRK(port)) {
port->icount.brk++;
/* Notify of BREAK */
@@ -2675,10 +2569,6 @@ static int sci_init_single(struct platform_device *dev,
pm_runtime_enable(&dev->dev);
}
- sci_port->break_timer.data = (unsigned long)sci_port;
- sci_port->break_timer.function = sci_break_timer;
- init_timer(&sci_port->break_timer);
-
port->type = p->type;
port->flags = UPF_FIXED_PORT | UPF_BOOT_AUTOCONF | p->flags;
port->regshift = p->regshift;
@@ -9,8 +9,6 @@
* Generic header for SuperH (H)SCI(F) (used by sh/sh64 and related parts)
*/
-#define SCIx_NOT_SUPPORTED (-1)
-
/* Serial Control Register (@ = not supported by all parts) */
#define SCSCR_TIE BIT(7) /* Transmit Interrupt Enable */
#define SCSCR_RIE BIT(6) /* Receive Interrupt Enable */
@@ -41,8 +39,6 @@ enum {
SCIx_NR_REGTYPES,
};
-struct device;
-
struct plat_sci_port_ops {
void (*init_pins)(struct uart_port *, unsigned int cflag);
};
@@ -66,7 +62,6 @@ struct plat_sci_port {
/*
* Platform overrides if necessary, defaults otherwise.
*/
- int port_reg;
unsigned char regshift;
unsigned char regtype;