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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-09 12:09:24 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-09 12:09:24 -0800
commit5983faf942f260023e547f3c5f38c1033c35cc9b (patch)
treef54ce89de5d9f7a05e99948937ac5456df09df30 /include
parent21a2cb565a74bf794d343ce22300c5f6c1568ae1 (diff)
parent995234da19b927f42722d796e8270384f33be11c (diff)
Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
* 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (65 commits) tty: serial: imx: move del_timer_sync() to avoid potential deadlock imx: add polled io uart methods imx: Add save/restore functions for UART control regs serial/imx: let probing fail for the dt case without a valid alias serial/imx: propagate error from of_alias_get_id instead of using -ENODEV tty: serial: imx: Allow UART to be a source for wakeup serial: driver for m32 arch should not have DEC alpha errata serial/documentation: fix documented name of DCD cpp symbol atmel_serial: fix spinlock lockup in RS485 code tty: Fix memory leak in virtual console when enable unicode translation serial: use DIV_ROUND_CLOSEST instead of open coding it serial: add support for 400 and 800 v3 series Titan cards serial: bfin-uart: Remove ASYNC_CTS_FLOW flag for hardware automatic CTS. serial: bfin-uart: Enable hardware automatic CTS only when CTS pin is available. serial: make FSL errata depend on 8250_CONSOLE, not just 8250 serial: add irq handler for Freescale 16550 errata. serial: manually inline serial8250_handle_port serial: make 8250 timeout use the specified IRQ handler serial: export the key functions for an 8250 IRQ handler serial: clean up parameter passing for 8250 Rx IRQ handling ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/serial_8250.h5
-rw-r--r--include/linux/serial_core.h100
2 files changed, 18 insertions, 87 deletions
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index 1f05bbeac01..8f012f8ac8e 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -66,6 +66,7 @@ enum {
* dependent on the 8250 driver.
*/
struct uart_port;
+struct uart_8250_port;
int serial8250_register_port(struct uart_port *);
void serial8250_unregister_port(int line);
@@ -81,7 +82,11 @@ extern void serial8250_do_set_termios(struct uart_port *port,
struct ktermios *termios, struct ktermios *old);
extern void serial8250_do_pm(struct uart_port *port, unsigned int state,
unsigned int oldstate);
+extern int fsl8250_handle_irq(struct uart_port *port);
int serial8250_handle_irq(struct uart_port *port, unsigned int iir);
+unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr);
+void serial8250_tx_chars(struct uart_8250_port *up);
+unsigned int serial8250_modem_status(struct uart_8250_port *up);
extern void serial8250_set_isa_configurator(void (*v)
(int port, struct uart_port *up,
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index eadf33d0abb..b67305e3ad5 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -351,6 +351,7 @@ struct uart_port {
#define UPF_CONS_FLOW ((__force upf_t) (1 << 23))
#define UPF_SHARE_IRQ ((__force upf_t) (1 << 24))
#define UPF_EXAR_EFR ((__force upf_t) (1 << 25))
+#define UPF_IIR_ONCE ((__force upf_t) (1 << 26))
/* The exact UART type is known and should not be probed. */
#define UPF_FIXED_TYPE ((__force upf_t) (1 << 27))
#define UPF_BOOT_AUTOCONF ((__force upf_t) (1 << 28))
@@ -483,10 +484,19 @@ static inline int uart_tx_stopped(struct uart_port *port)
/*
* The following are helper functions for the low level drivers.
*/
+
+extern void uart_handle_dcd_change(struct uart_port *uport,
+ unsigned int status);
+extern void uart_handle_cts_change(struct uart_port *uport,
+ unsigned int status);
+
+extern void uart_insert_char(struct uart_port *port, unsigned int status,
+ unsigned int overrun, unsigned int ch, unsigned int flag);
+
+#ifdef SUPPORT_SYSRQ
static inline int
uart_handle_sysrq_char(struct uart_port *port, unsigned int ch)
{
-#ifdef SUPPORT_SYSRQ
if (port->sysrq) {
if (ch && time_before(jiffies, port->sysrq)) {
handle_sysrq(ch);
@@ -495,11 +505,10 @@ uart_handle_sysrq_char(struct uart_port *port, unsigned int ch)
}
port->sysrq = 0;
}
-#endif
return 0;
}
-#ifndef SUPPORT_SYSRQ
-#define uart_handle_sysrq_char(port,ch) uart_handle_sysrq_char(port, 0)
+#else
+#define uart_handle_sysrq_char(port,ch) ({ (void)port; 0; })
#endif
/*
@@ -522,89 +531,6 @@ static inline int uart_handle_break(struct uart_port *port)
return 0;
}
-/**
- * uart_handle_dcd_change - handle a change of carrier detect state
- * @uport: uart_port structure for the open port
- * @status: new carrier detect status, nonzero if active
- */
-static inline void
-uart_handle_dcd_change(struct uart_port *uport, unsigned int status)
-{
- struct uart_state *state = uport->state;
- struct tty_port *port = &state->port;
- struct tty_ldisc *ld = tty_ldisc_ref(port->tty);
- struct pps_event_time ts;
-
- if (ld && ld->ops->dcd_change)
- pps_get_ts(&ts);
-
- uport->icount.dcd++;
-#ifdef CONFIG_HARD_PPS
- if ((uport->flags & UPF_HARDPPS_CD) && status)
- hardpps();
-#endif
-
- if (port->flags & ASYNC_CHECK_CD) {
- if (status)
- wake_up_interruptible(&port->open_wait);
- else if (port->tty)
- tty_hangup(port->tty);
- }
-
- if (ld && ld->ops->dcd_change)
- ld->ops->dcd_change(port->tty, status, &ts);
- if (ld)
- tty_ldisc_deref(ld);
-}
-
-/**
- * uart_handle_cts_change - handle a change of clear-to-send state
- * @uport: uart_port structure for the open port
- * @status: new clear to send status, nonzero if active
- */
-static inline void
-uart_handle_cts_change(struct uart_port *uport, unsigned int status)
-{
- struct tty_port *port = &uport->state->port;
- struct tty_struct *tty = port->tty;
-
- uport->icount.cts++;
-
- if (port->flags & ASYNC_CTS_FLOW) {
- if (tty->hw_stopped) {
- if (status) {
- tty->hw_stopped = 0;
- uport->ops->start_tx(uport);
- uart_write_wakeup(uport);
- }
- } else {
- if (!status) {
- tty->hw_stopped = 1;
- uport->ops->stop_tx(uport);
- }
- }
- }
-}
-
-#include <linux/tty_flip.h>
-
-static inline void
-uart_insert_char(struct uart_port *port, unsigned int status,
- unsigned int overrun, unsigned int ch, unsigned int flag)
-{
- struct tty_struct *tty = port->state->port.tty;
-
- if ((status & port->ignore_status_mask & ~overrun) == 0)
- tty_insert_flip_char(tty, ch, flag);
-
- /*
- * Overrun is special. Since it's reported immediately,
- * it doesn't affect the current character.
- */
- if (status & ~port->ignore_status_mask & overrun)
- tty_insert_flip_char(tty, 0, TTY_OVERRUN);
-}
-
/*
* UART_ENABLE_MS - determine if port should enable modem status irqs
*/