Merge branch 'tty-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git

6 files changed, 65 insertions, 20 deletions

diff --git a/include/linux/console_struct.h b/include/linux/console_struct.h
index d5b9c8d40c18..f75033f0277f 100644
--- a/include/linux/console_struct.h
+++ b/include/linux/console_struct.h
@@ -17,7 +17,7 @@
 #include <linux/vt.h>
 #include <linux/workqueue.h>
 
-struct uni_pagedir;
+struct uni_pagedict;
 struct uni_screen;
 
 #define NPAR 16
@@ -157,8 +157,8 @@ struct vc_data {
 	unsigned int	vc_bell_duration;	/* Console bell duration */
 	unsigned short	vc_cur_blink_ms;	/* Cursor blink duration */
 	struct vc_data **vc_display_fg;		/* [!] Ptr to var holding fg console for this display */
-	struct uni_pagedir *vc_uni_pagedir;
-	struct uni_pagedir **vc_uni_pagedir_loc; /* [!] Location of uni_pagedir variable for this console */
+	struct uni_pagedict *vc_uni_pagedir;
+	struct uni_pagedict **vc_uni_pagedir_loc; /* [!] Location of uni_pagedict variable for this console */
 	struct uni_screen *vc_uni_screen;	/* unicode screen content */
 	/* additional information is in vt_kern.h */
 };
diff --git a/include/linux/consolemap.h b/include/linux/consolemap.h
index bcfce748c9d8..c35db4896c37 100644
--- a/include/linux/consolemap.h
+++ b/include/linux/consolemap.h
@@ -7,30 +7,56 @@
 #ifndef __LINUX_CONSOLEMAP_H__
 #define __LINUX_CONSOLEMAP_H__
 
-#define LAT1_MAP 0
-#define GRAF_MAP 1
-#define IBMPC_MAP 2
-#define USER_MAP 3
+enum translation_map {
+	LAT1_MAP,
+	GRAF_MAP,
+	IBMPC_MAP,
+	USER_MAP,
+
+	FIRST_MAP = LAT1_MAP,
+	LAST_MAP = USER_MAP,
+};
 
 #include <linux/types.h>
 
-#ifdef CONFIG_CONSOLE_TRANSLATIONS
 struct vc_data;
 
-extern u16 inverse_translate(const struct vc_data *conp, int glyph,
-		int use_unicode);
-extern unsigned short *set_translate(int m, struct vc_data *vc);
-extern int conv_uni_to_pc(struct vc_data *conp, long ucs);
-extern u32 conv_8bit_to_uni(unsigned char c);
-extern int conv_uni_to_8bit(u32 uni);
+#ifdef CONFIG_CONSOLE_TRANSLATIONS
+u16 inverse_translate(const struct vc_data *conp, u16 glyph, bool use_unicode);
+unsigned short *set_translate(enum translation_map m, struct vc_data *vc);
+int conv_uni_to_pc(struct vc_data *conp, long ucs);
+u32 conv_8bit_to_uni(unsigned char c);
+int conv_uni_to_8bit(u32 uni);
 void console_map_init(void);
 #else
-#define inverse_translate(conp, glyph, uni) ((uint16_t)glyph)
-#define set_translate(m, vc) ((unsigned short *)NULL)
-#define conv_uni_to_pc(conp, ucs) ((int) (ucs > 0xff ? -1: ucs))
-#define conv_8bit_to_uni(c) ((uint32_t)(c))
-#define conv_uni_to_8bit(c) ((int) ((c) & 0xff))
-#define console_map_init(c) do { ; } while (0)
+static inline u16 inverse_translate(const struct vc_data *conp, u16 glyph,
+		bool use_unicode)
+{
+	return glyph;
+}
+
+static inline unsigned short *set_translate(enum translation_map m,
+		struct vc_data *vc)
+{
+	return NULL;
+}
+
+static inline int conv_uni_to_pc(struct vc_data *conp, long ucs)
+{
+	return ucs > 0xff ? -1 : ucs;
+}
+
+static inline u32 conv_8bit_to_uni(unsigned char c)
+{
+	return c;
+}
+
+static inline int conv_uni_to_8bit(u32 uni)
+{
+	return uni & 0xff;
+}
+
+static inline void console_map_init(void) { }
 #endif /* CONFIG_CONSOLE_TRANSLATIONS */
 
 #endif /* __LINUX_CONSOLEMAP_H__ */
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 657a0fc68a3f..8032ffa741ed 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -255,6 +255,7 @@ struct uart_port {
 	struct attribute_group	*attr_group;		/* port specific attributes */
 	const struct attribute_group **tty_groups;	/* all attributes (serial core use only) */
 	struct serial_rs485     rs485;
+	const struct serial_rs485	*rs485_supported;	/* Supported mask for serial_rs485 */
 	struct gpio_desc	*rs485_term_gpio;	/* enable RS485 bus termination */
 	struct serial_iso7816   iso7816;
 	void			*private_data;		/* generic platform data pointer */
@@ -593,4 +594,5 @@ static inline int uart_handle_break(struct uart_port *port)
 					 !((cflag) & CLOCAL))
 
 int uart_get_rs485_mode(struct uart_port *port);
+int uart_rs485_config(struct uart_port *port);
 #endif /* LINUX_SERIAL_CORE_H */
diff --git a/include/linux/tty_buffer.h b/include/linux/tty_buffer.h
index 3b9d77604291..1796648c2907 100644
--- a/include/linux/tty_buffer.h
+++ b/include/linux/tty_buffer.h
@@ -15,6 +15,7 @@ struct tty_buffer {
 	int used;
 	int size;
 	int commit;
+	int lookahead;		/* Lazy update on recv, can become less than "read" */
 	int read;
 	int flags;
 	/* Data points here */
diff --git a/include/linux/tty_ldisc.h b/include/linux/tty_ldisc.h
index e85002b56752..33678e1936f6 100644
--- a/include/linux/tty_ldisc.h
+++ b/include/linux/tty_ldisc.h
@@ -186,6 +186,18 @@ int ldsem_down_write_nested(struct ld_semaphore *sem, int subclass,
  *	indicate all data received is %TTY_NORMAL. If assigned, prefer this
  *	function for automatic flow control.
  *
+ * @lookahead_buf: [DRV] ``void ()(struct tty_struct *tty,
+ *			const unsigned char *cp, const char *fp, int count)
+ *
+ *	This function is called by the low-level tty driver for characters
+ *	not eaten by ->receive_buf() or ->receive_buf2(). It is useful for
+ *	processing high-priority characters such as software flow-control
+ *	characters that could otherwise get stuck into the intermediate
+ *	buffer until tty has room to receive them. Ldisc must be able to
+ *	handle later a ->receive_buf() or ->receive_buf2() call for the
+ *	same characters (e.g. by skipping the actions for high-priority
+ *	characters already handled by ->lookahead_buf()).
+ *
  * @owner: module containting this ldisc (for reference counting)
  *
  * This structure defines the interface between the tty line discipline
@@ -229,6 +241,8 @@ struct tty_ldisc_ops {
 	void	(*dcd_change)(struct tty_struct *tty, unsigned int status);
 	int	(*receive_buf2)(struct tty_struct *tty, const unsigned char *cp,
 				const char *fp, int count);
+	void	(*lookahead_buf)(struct tty_struct *tty, const unsigned char *cp,
+				 const unsigned char *fp, unsigned int count);
 
 	struct  module *owner;
 };
diff --git a/include/linux/tty_port.h b/include/linux/tty_port.h
index 58e9619116b7..fa3c3bdaa234 100644
--- a/include/linux/tty_port.h
+++ b/include/linux/tty_port.h
@@ -40,6 +40,8 @@ struct tty_port_operations {
 
 struct tty_port_client_operations {
 	int (*receive_buf)(struct tty_port *port, const unsigned char *, const unsigned char *, size_t);
+	void (*lookahead_buf)(struct tty_port *port, const unsigned char *cp,
+			      const unsigned char *fp, unsigned int count);
 	void (*write_wakeup)(struct tty_port *port);
 };