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authorLinus Torvalds <torvalds@linux-foundation.org>2016-05-21 06:57:27 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-21 06:57:27 +0300
commite10abc629f38efd9b6936cf3612583cc846104d9 (patch)
tree58fb8f6dba5d085d4b0352137d18faf7cfa47a69 /include
parent0eff4589c36edd03d50b835d0768b2c2ef3f20bd (diff)
parentd20bb59af64667a16f2468b54fc0adb2f824a3b6 (diff)
downloadlinux-e10abc629f38efd9b6936cf3612583cc846104d9.tar.xz
Merge tag 'tty-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty and serial driver updates from Greg KH: "Here's the large TTY and Serial driver update for 4.7-rc1. A few new serial drivers are added here, and Peter has fixed a bunch of long-standing bugs in the tty layer and serial drivers as normal. Full details in the shortlog. All of these have been in linux-next for a while with no reported issues" * tag 'tty-4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (88 commits) MAINTAINERS: 8250: remove website reference serial: core: Fix port mutex assert if lockdep disabled serial: 8250_dw: fix wrong logic in dw8250_check_lcr() tty: vt, finish looping on duplicate tty: vt, return error when con_startup fails QE-UART: add "fsl,t1040-ucc-uart" to of_device_id serial: mctrl_gpio: Drop support for out1-gpios and out2-gpios serial: 8250dw: Add device HID for future AMD UART controller Fix OpenSSH pty regression on close serial: mctrl_gpio: add IRQ locking serial: 8250: Integrate Fintek into 8250_base serial: mps2-uart: add support for early console serial: mps2-uart: add MPS2 UART driver dt-bindings: document the MPS2 UART bindings serial: sirf: Use generic uart-has-rtscts DT property serial: sirf: Introduce helper variable struct device_node *np serial: mxs-auart: Use generic uart-has-rtscts DT property serial: imx: Use generic uart-has-rtscts DT property doc: DT: Add Generic Serial Device Tree Bindings serial: 8250: of: Make tegra_serial_handle_break() static ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/console.h2
-rw-r--r--include/linux/selection.h8
-rw-r--r--include/linux/serial_8250.h2
-rw-r--r--include/linux/serial_core.h3
-rw-r--r--include/linux/tty.h89
-rw-r--r--include/uapi/linux/serial_core.h3
-rw-r--r--include/uapi/linux/tty_flags.h13
-rw-r--r--include/uapi/linux/vt.h1
8 files changed, 111 insertions, 10 deletions
diff --git a/include/linux/console.h b/include/linux/console.h
index ea731af2451e..137ac1a1c16f 100644
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -47,7 +47,7 @@ struct consw {
int (*con_font_copy)(struct vc_data *, int);
int (*con_resize)(struct vc_data *, unsigned int, unsigned int,
unsigned int);
- int (*con_set_palette)(struct vc_data *, unsigned char *);
+ int (*con_set_palette)(struct vc_data *, const unsigned char *);
int (*con_scrolldelta)(struct vc_data *, int);
int (*con_set_origin)(struct vc_data *);
void (*con_save_screen)(struct vc_data *);
diff --git a/include/linux/selection.h b/include/linux/selection.h
index 85193aa8c1e3..8e4624efdb6f 100644
--- a/include/linux/selection.h
+++ b/include/linux/selection.h
@@ -24,10 +24,10 @@ extern void mouse_report(struct tty_struct * tty, int butt, int mrx, int mry);
extern int console_blanked;
-extern unsigned char color_table[];
-extern int default_red[];
-extern int default_grn[];
-extern int default_blu[];
+extern const unsigned char color_table[];
+extern unsigned char default_red[];
+extern unsigned char default_grn[];
+extern unsigned char default_blu[];
extern unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed);
extern u16 screen_glyph(struct vc_data *vc, int offset);
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index 434879759725..48ec7651989b 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -36,6 +36,7 @@ struct plat_serial8250_port {
void (*set_termios)(struct uart_port *,
struct ktermios *new,
struct ktermios *old);
+ unsigned int (*get_mctrl)(struct uart_port *);
int (*handle_irq)(struct uart_port *);
void (*pm)(struct uart_port *, unsigned int state,
unsigned old);
@@ -148,6 +149,7 @@ extern int early_serial8250_setup(struct earlycon_device *device,
const char *options);
extern void serial8250_do_set_termios(struct uart_port *port,
struct ktermios *termios, struct ktermios *old);
+extern unsigned int serial8250_do_get_mctrl(struct uart_port *port);
extern int serial8250_do_startup(struct uart_port *port);
extern void serial8250_do_shutdown(struct uart_port *port);
extern void serial8250_do_pm(struct uart_port *port, unsigned int state,
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index cbfcf38e220d..a3d7c0d4a03e 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -123,6 +123,7 @@ struct uart_port {
void (*set_termios)(struct uart_port *,
struct ktermios *new,
struct ktermios *old);
+ unsigned int (*get_mctrl)(struct uart_port *);
void (*set_mctrl)(struct uart_port *, unsigned int);
int (*startup)(struct uart_port *port);
void (*shutdown)(struct uart_port *port);
@@ -281,6 +282,8 @@ struct uart_state {
enum uart_pm_state pm_state;
struct circ_buf xmit;
+ atomic_t refcount;
+ wait_queue_head_t remove_wait;
struct uart_port *uart_port;
};
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 17b247c94440..40144f382516 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -228,7 +228,8 @@ struct tty_port {
int count; /* Usage count */
wait_queue_head_t open_wait; /* Open waiters */
wait_queue_head_t delta_msr_wait; /* Modem status change */
- unsigned long flags; /* TTY flags ASY_*/
+ unsigned long flags; /* User TTY flags ASYNC_ */
+ unsigned long iflags; /* Internal flags TTY_PORT_ */
unsigned char console:1, /* port is a console */
low_latency:1; /* optional: tune for latency */
struct mutex mutex; /* Locking */
@@ -242,6 +243,18 @@ struct tty_port {
struct kref kref; /* Ref counter */
};
+/* tty_port::iflags bits -- use atomic bit ops */
+#define TTY_PORT_INITIALIZED 0 /* device is initialized */
+#define TTY_PORT_SUSPENDED 1 /* device is suspended */
+#define TTY_PORT_ACTIVE 2 /* device is open */
+
+/*
+ * uart drivers: use the uart_port::status field and the UPSTAT_* defines
+ * for s/w-based flow control steering and carrier detection status
+ */
+#define TTY_PORT_CTS_FLOW 3 /* h/w flow control enabled */
+#define TTY_PORT_CHECK_CD 4 /* carrier detect enabled */
+
/*
* Where all of the state associated with a tty is kept while the tty
* is open. Since the termios state should be kept even if the tty
@@ -338,7 +351,6 @@ struct tty_file_private {
#define TTY_OTHER_CLOSED 2 /* Other side (if any) has closed */
#define TTY_EXCLUSIVE 3 /* Exclusive open mode */
#define TTY_DO_WRITE_WAKEUP 5 /* Call write_wakeup after queuing new */
-#define TTY_OTHER_DONE 6 /* Closed pty has completed input processing */
#define TTY_LDISC_OPEN 11 /* Line discipline is open */
#define TTY_PTY_LOCK 16 /* pty private */
#define TTY_NO_WRITE_SPLIT 17 /* Preserve write boundaries to driver */
@@ -360,6 +372,16 @@ static inline void tty_set_flow_change(struct tty_struct *tty, int val)
smp_mb();
}
+static inline bool tty_io_error(struct tty_struct *tty)
+{
+ return test_bit(TTY_IO_ERROR, &tty->flags);
+}
+
+static inline bool tty_throttled(struct tty_struct *tty)
+{
+ return test_bit(TTY_THROTTLED, &tty->flags);
+}
+
#ifdef CONFIG_TTY
extern void console_init(void);
extern void tty_kref_put(struct tty_struct *tty);
@@ -459,6 +481,7 @@ extern void tty_buffer_init(struct tty_port *port);
extern void tty_buffer_set_lock_subclass(struct tty_port *port);
extern bool tty_buffer_restart_work(struct tty_port *port);
extern bool tty_buffer_cancel_work(struct tty_port *port);
+extern void tty_buffer_flush_work(struct tty_port *port);
extern speed_t tty_termios_baud_rate(struct ktermios *termios);
extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
extern void tty_termios_encode_baud_rate(struct ktermios *termios,
@@ -539,7 +562,67 @@ static inline struct tty_port *tty_port_get(struct tty_port *port)
/* If the cts flow control is enabled, return true. */
static inline bool tty_port_cts_enabled(struct tty_port *port)
{
- return port->flags & ASYNC_CTS_FLOW;
+ return test_bit(TTY_PORT_CTS_FLOW, &port->iflags);
+}
+
+static inline void tty_port_set_cts_flow(struct tty_port *port, bool val)
+{
+ if (val)
+ set_bit(TTY_PORT_CTS_FLOW, &port->iflags);
+ else
+ clear_bit(TTY_PORT_CTS_FLOW, &port->iflags);
+}
+
+static inline bool tty_port_active(struct tty_port *port)
+{
+ return test_bit(TTY_PORT_ACTIVE, &port->iflags);
+}
+
+static inline void tty_port_set_active(struct tty_port *port, bool val)
+{
+ if (val)
+ set_bit(TTY_PORT_ACTIVE, &port->iflags);
+ else
+ clear_bit(TTY_PORT_ACTIVE, &port->iflags);
+}
+
+static inline bool tty_port_check_carrier(struct tty_port *port)
+{
+ return test_bit(TTY_PORT_CHECK_CD, &port->iflags);
+}
+
+static inline void tty_port_set_check_carrier(struct tty_port *port, bool val)
+{
+ if (val)
+ set_bit(TTY_PORT_CHECK_CD, &port->iflags);
+ else
+ clear_bit(TTY_PORT_CHECK_CD, &port->iflags);
+}
+
+static inline bool tty_port_suspended(struct tty_port *port)
+{
+ return test_bit(TTY_PORT_SUSPENDED, &port->iflags);
+}
+
+static inline void tty_port_set_suspended(struct tty_port *port, bool val)
+{
+ if (val)
+ set_bit(TTY_PORT_SUSPENDED, &port->iflags);
+ else
+ clear_bit(TTY_PORT_SUSPENDED, &port->iflags);
+}
+
+static inline bool tty_port_initialized(struct tty_port *port)
+{
+ return test_bit(TTY_PORT_INITIALIZED, &port->iflags);
+}
+
+static inline void tty_port_set_initialized(struct tty_port *port, bool val)
+{
+ if (val)
+ set_bit(TTY_PORT_INITIALIZED, &port->iflags);
+ else
+ clear_bit(TTY_PORT_INITIALIZED, &port->iflags);
}
extern struct tty_struct *tty_port_tty_get(struct tty_port *port);
diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h
index 24da334af7f1..99dbed8a8874 100644
--- a/include/uapi/linux/serial_core.h
+++ b/include/uapi/linux/serial_core.h
@@ -267,4 +267,7 @@
/* Microchip PIC32 UART */
#define PORT_PIC32 115
+/* MPS2 UART */
+#define PORT_MPS2UART 116
+
#endif /* _UAPILINUX_SERIAL_CORE_H */
diff --git a/include/uapi/linux/tty_flags.h b/include/uapi/linux/tty_flags.h
index 072e41e45ee2..66e4d8bcb16f 100644
--- a/include/uapi/linux/tty_flags.h
+++ b/include/uapi/linux/tty_flags.h
@@ -32,7 +32,13 @@
#define ASYNCB_MAGIC_MULTIPLIER 16 /* Use special CLK or divisor */
#define ASYNCB_LAST_USER 16
-/* Internal flags used only by kernel */
+/*
+ * Internal flags used only by kernel (read-only)
+ *
+ * WARNING: These flags are no longer used and have been superceded by the
+ * TTY_PORT_ flags in the iflags field (and not userspace-visible)
+ */
+#ifndef _KERNEL_
#define ASYNCB_INITIALIZED 31 /* Serial port was initialized */
#define ASYNCB_SUSPENDED 30 /* Serial port is suspended */
#define ASYNCB_NORMAL_ACTIVE 29 /* Normal device is active */
@@ -43,7 +49,9 @@
#define ASYNCB_SHARE_IRQ 24 /* for multifunction cards, no longer used */
#define ASYNCB_CONS_FLOW 23 /* flow control for console */
#define ASYNCB_FIRST_KERNEL 22
+#endif
+/* Masks */
#define ASYNC_HUP_NOTIFY (1U << ASYNCB_HUP_NOTIFY)
#define ASYNC_SUSPENDED (1U << ASYNCB_SUSPENDED)
#define ASYNC_FOURPORT (1U << ASYNCB_FOURPORT)
@@ -72,6 +80,8 @@
#define ASYNC_SPD_WARP (ASYNC_SPD_HI|ASYNC_SPD_SHI)
#define ASYNC_SPD_MASK (ASYNC_SPD_HI|ASYNC_SPD_VHI|ASYNC_SPD_SHI)
+#ifndef _KERNEL_
+/* These flags are no longer used (and were always masked from userspace) */
#define ASYNC_INITIALIZED (1U << ASYNCB_INITIALIZED)
#define ASYNC_NORMAL_ACTIVE (1U << ASYNCB_NORMAL_ACTIVE)
#define ASYNC_BOOT_AUTOCONF (1U << ASYNCB_BOOT_AUTOCONF)
@@ -81,5 +91,6 @@
#define ASYNC_SHARE_IRQ (1U << ASYNCB_SHARE_IRQ)
#define ASYNC_CONS_FLOW (1U << ASYNCB_CONS_FLOW)
#define ASYNC_INTERNAL_FLAGS (~((1U << ASYNCB_FIRST_KERNEL) - 1))
+#endif
#endif
diff --git a/include/uapi/linux/vt.h b/include/uapi/linux/vt.h
index 978578bd1895..f69034887e68 100644
--- a/include/uapi/linux/vt.h
+++ b/include/uapi/linux/vt.h
@@ -8,7 +8,6 @@
*/
#define MIN_NR_CONSOLES 1 /* must be at least 1 */
#define MAX_NR_CONSOLES 63 /* serial lines start at 64 */
-#define MAX_NR_USER_CONSOLES 63 /* must be root to allocate above this */
/* Note: the ioctl VT_GETSTATE does not work for
consoles 16 and higher (since it returns a short) */