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-rw-r--r--include/linux/console.h4
-rw-r--r--include/linux/serdev.h262
-rw-r--r--include/linux/serial_core.h2
-rw-r--r--include/linux/serial_sci.h15
-rw-r--r--include/linux/tty.h12
-rw-r--r--include/uapi/linux/serial_core.h3
-rw-r--r--include/uapi/linux/serial_reg.h26
7 files changed, 287 insertions, 37 deletions
diff --git a/include/linux/console.h b/include/linux/console.h
index 9c26c6685587..5949d1855589 100644
--- a/include/linux/console.h
+++ b/include/linux/console.h
@@ -73,6 +73,10 @@ struct consw {
u16 *(*con_screen_pos)(struct vc_data *, int);
unsigned long (*con_getxy)(struct vc_data *, unsigned long, int *, int *);
/*
+ * Flush the video console driver's scrollback buffer
+ */
+ void (*con_flush_scrollback)(struct vc_data *);
+ /*
* Prepare the console for the debugger. This includes, but is not
* limited to, unblanking the console, loading an appropriate
* palette, and allowing debugger generated output.
diff --git a/include/linux/serdev.h b/include/linux/serdev.h
new file mode 100644
index 000000000000..9519da6253a8
--- /dev/null
+++ b/include/linux/serdev.h
@@ -0,0 +1,262 @@
+/*
+ * Copyright (C) 2016-2017 Linaro Ltd., Rob Herring <robh@kernel.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#ifndef _LINUX_SERDEV_H
+#define _LINUX_SERDEV_H
+
+#include <linux/types.h>
+#include <linux/device.h>
+
+struct serdev_controller;
+struct serdev_device;
+
+/*
+ * serdev device structures
+ */
+
+/**
+ * struct serdev_device_ops - Callback operations for a serdev device
+ * @receive_buf: Function called with data received from device.
+ * @write_wakeup: Function called when ready to transmit more data.
+ */
+struct serdev_device_ops {
+ int (*receive_buf)(struct serdev_device *, const unsigned char *, size_t);
+ void (*write_wakeup)(struct serdev_device *);
+};
+
+/**
+ * struct serdev_device - Basic representation of an serdev device
+ * @dev: Driver model representation of the device.
+ * @nr: Device number on serdev bus.
+ * @ctrl: serdev controller managing this device.
+ * @ops: Device operations.
+ */
+struct serdev_device {
+ struct device dev;
+ int nr;
+ struct serdev_controller *ctrl;
+ const struct serdev_device_ops *ops;
+};
+
+static inline struct serdev_device *to_serdev_device(struct device *d)
+{
+ return container_of(d, struct serdev_device, dev);
+}
+
+/**
+ * struct serdev_device_driver - serdev slave device driver
+ * @driver: serdev device drivers should initialize name field of this
+ * structure.
+ * @probe: binds this driver to a serdev device.
+ * @remove: unbinds this driver from the serdev device.
+ */
+struct serdev_device_driver {
+ struct device_driver driver;
+ int (*probe)(struct serdev_device *);
+ void (*remove)(struct serdev_device *);
+};
+
+static inline struct serdev_device_driver *to_serdev_device_driver(struct device_driver *d)
+{
+ return container_of(d, struct serdev_device_driver, driver);
+}
+
+/*
+ * serdev controller structures
+ */
+struct serdev_controller_ops {
+ int (*write_buf)(struct serdev_controller *, const unsigned char *, size_t);
+ void (*write_flush)(struct serdev_controller *);
+ int (*write_room)(struct serdev_controller *);
+ int (*open)(struct serdev_controller *);
+ void (*close)(struct serdev_controller *);
+ void (*set_flow_control)(struct serdev_controller *, bool);
+ unsigned int (*set_baudrate)(struct serdev_controller *, unsigned int);
+};
+
+/**
+ * struct serdev_controller - interface to the serdev controller
+ * @dev: Driver model representation of the device.
+ * @nr: number identifier for this controller/bus.
+ * @serdev: Pointer to slave device for this controller.
+ * @ops: Controller operations.
+ */
+struct serdev_controller {
+ struct device dev;
+ unsigned int nr;
+ struct serdev_device *serdev;
+ const struct serdev_controller_ops *ops;
+};
+
+static inline struct serdev_controller *to_serdev_controller(struct device *d)
+{
+ return container_of(d, struct serdev_controller, dev);
+}
+
+static inline void *serdev_device_get_drvdata(const struct serdev_device *serdev)
+{
+ return dev_get_drvdata(&serdev->dev);
+}
+
+static inline void serdev_device_set_drvdata(struct serdev_device *serdev, void *data)
+{
+ dev_set_drvdata(&serdev->dev, data);
+}
+
+/**
+ * serdev_device_put() - decrement serdev device refcount
+ * @serdev serdev device.
+ */
+static inline void serdev_device_put(struct serdev_device *serdev)
+{
+ if (serdev)
+ put_device(&serdev->dev);
+}
+
+static inline void serdev_device_set_client_ops(struct serdev_device *serdev,
+ const struct serdev_device_ops *ops)
+{
+ serdev->ops = ops;
+}
+
+static inline
+void *serdev_controller_get_drvdata(const struct serdev_controller *ctrl)
+{
+ return ctrl ? dev_get_drvdata(&ctrl->dev) : NULL;
+}
+
+static inline void serdev_controller_set_drvdata(struct serdev_controller *ctrl,
+ void *data)
+{
+ dev_set_drvdata(&ctrl->dev, data);
+}
+
+/**
+ * serdev_controller_put() - decrement controller refcount
+ * @ctrl serdev controller.
+ */
+static inline void serdev_controller_put(struct serdev_controller *ctrl)
+{
+ if (ctrl)
+ put_device(&ctrl->dev);
+}
+
+struct serdev_device *serdev_device_alloc(struct serdev_controller *);
+int serdev_device_add(struct serdev_device *);
+void serdev_device_remove(struct serdev_device *);
+
+struct serdev_controller *serdev_controller_alloc(struct device *, size_t);
+int serdev_controller_add(struct serdev_controller *);
+void serdev_controller_remove(struct serdev_controller *);
+
+static inline void serdev_controller_write_wakeup(struct serdev_controller *ctrl)
+{
+ struct serdev_device *serdev = ctrl->serdev;
+
+ if (!serdev || !serdev->ops->write_wakeup)
+ return;
+
+ serdev->ops->write_wakeup(ctrl->serdev);
+}
+
+static inline int serdev_controller_receive_buf(struct serdev_controller *ctrl,
+ const unsigned char *data,
+ size_t count)
+{
+ struct serdev_device *serdev = ctrl->serdev;
+
+ if (!serdev || !serdev->ops->receive_buf)
+ return -EINVAL;
+
+ return serdev->ops->receive_buf(ctrl->serdev, data, count);
+}
+
+#if IS_ENABLED(CONFIG_SERIAL_DEV_BUS)
+
+int serdev_device_open(struct serdev_device *);
+void serdev_device_close(struct serdev_device *);
+unsigned int serdev_device_set_baudrate(struct serdev_device *, unsigned int);
+void serdev_device_set_flow_control(struct serdev_device *, bool);
+int serdev_device_write_buf(struct serdev_device *, const unsigned char *, size_t);
+void serdev_device_write_flush(struct serdev_device *);
+int serdev_device_write_room(struct serdev_device *);
+
+/*
+ * serdev device driver functions
+ */
+int __serdev_device_driver_register(struct serdev_device_driver *, struct module *);
+#define serdev_device_driver_register(sdrv) \
+ __serdev_device_driver_register(sdrv, THIS_MODULE)
+
+/**
+ * serdev_device_driver_unregister() - unregister an serdev client driver
+ * @sdrv: the driver to unregister
+ */
+static inline void serdev_device_driver_unregister(struct serdev_device_driver *sdrv)
+{
+ if (sdrv)
+ driver_unregister(&sdrv->driver);
+}
+
+#define module_serdev_device_driver(__serdev_device_driver) \
+ module_driver(__serdev_device_driver, serdev_device_driver_register, \
+ serdev_device_driver_unregister)
+
+#else
+
+static inline int serdev_device_open(struct serdev_device *sdev)
+{
+ return -ENODEV;
+}
+static inline void serdev_device_close(struct serdev_device *sdev) {}
+static inline unsigned int serdev_device_set_baudrate(struct serdev_device *sdev, unsigned int baudrate)
+{
+ return 0;
+}
+static inline void serdev_device_set_flow_control(struct serdev_device *sdev, bool enable) {}
+static inline int serdev_device_write_buf(struct serdev_device *sdev, const unsigned char *buf, size_t count)
+{
+ return -ENODEV;
+}
+static inline void serdev_device_write_flush(struct serdev_device *sdev) {}
+static inline int serdev_device_write_room(struct serdev_device *sdev)
+{
+ return 0;
+}
+
+#define serdev_device_driver_register(x)
+#define serdev_device_driver_unregister(x)
+
+#endif /* CONFIG_SERIAL_DEV_BUS */
+
+/*
+ * serdev hooks into TTY core
+ */
+struct tty_port;
+struct tty_driver;
+
+#ifdef CONFIG_SERIAL_DEV_CTRL_TTYPORT
+struct device *serdev_tty_port_register(struct tty_port *port,
+ struct device *parent,
+ struct tty_driver *drv, int idx);
+void serdev_tty_port_unregister(struct tty_port *port);
+#else
+static inline struct device *serdev_tty_port_register(struct tty_port *port,
+ struct device *parent,
+ struct tty_driver *drv, int idx)
+{
+ return ERR_PTR(-ENODEV);
+}
+static inline void serdev_tty_port_unregister(struct tty_port *port) {}
+#endif /* CONFIG_SERIAL_DEV_CTRL_TTYPORT */
+
+#endif /*_LINUX_SERDEV_H */
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 5def8e830fb0..58484fb35cc8 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -450,7 +450,7 @@ extern void uart_handle_cts_change(struct uart_port *uport,
extern void uart_insert_char(struct uart_port *port, unsigned int status,
unsigned int overrun, unsigned int ch, unsigned int flag);
-#ifdef SUPPORT_SYSRQ
+#if defined(SUPPORT_SYSRQ) && defined(CONFIG_MAGIC_SYSRQ_SERIAL)
static inline int
uart_handle_sysrq_char(struct uart_port *port, unsigned int ch)
{
diff --git a/include/linux/serial_sci.h b/include/linux/serial_sci.h
index 9f2bfd055742..e598eaef3962 100644
--- a/include/linux/serial_sci.h
+++ b/include/linux/serial_sci.h
@@ -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 */
@@ -41,24 +39,16 @@ enum {
SCIx_NR_REGTYPES,
};
-struct device;
-
struct plat_sci_port_ops {
void (*init_pins)(struct uart_port *, unsigned int cflag);
};
/*
- * Port-specific capabilities
- */
-#define SCIx_HAVE_RTSCTS BIT(0)
-
-/*
* Platform device specific platform_data struct
*/
struct plat_sci_port {
unsigned int type; /* SCI / SCIF / IRDA / HSCIF */
upf_t flags; /* UPF_* flags */
- unsigned long capabilities; /* Port features/capabilities */
unsigned int sampling_rate;
unsigned int scscr; /* SCSCR initialization */
@@ -66,14 +56,9 @@ struct plat_sci_port {
/*
* Platform overrides if necessary, defaults otherwise.
*/
- int port_reg;
- unsigned char regshift;
unsigned char regtype;
struct plat_sci_port_ops *ops;
-
- unsigned int dma_slave_tx;
- unsigned int dma_slave_rx;
};
#endif /* __LINUX_SERIAL_SCI_H */
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 40144f382516..1017e904c0a3 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -217,12 +217,18 @@ struct tty_port_operations {
/* Called on the final put of a port */
void (*destruct)(struct tty_port *port);
};
-
+
+struct tty_port_client_operations {
+ int (*receive_buf)(struct tty_port *port, const unsigned char *, const unsigned char *, size_t);
+ void (*write_wakeup)(struct tty_port *port);
+};
+
struct tty_port {
struct tty_bufhead buf; /* Locked internally */
struct tty_struct *tty; /* Back pointer */
struct tty_struct *itty; /* internal back ptr */
const struct tty_port_operations *ops; /* Port operations */
+ const struct tty_port_client_operations *client_ops; /* Port client operations */
spinlock_t lock; /* Lock protecting tty field */
int blocked_open; /* Waiting to open */
int count; /* Usage count */
@@ -241,6 +247,7 @@ struct tty_port {
based drain is needed else
set to size of fifo */
struct kref kref; /* Ref counter */
+ void *client_data;
};
/* tty_port::iflags bits -- use atomic bit ops */
@@ -528,6 +535,7 @@ extern int tty_alloc_file(struct file *file);
extern void tty_add_file(struct tty_struct *tty, struct file *file);
extern void tty_free_file(struct file *file);
extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx);
+extern void tty_release_struct(struct tty_struct *tty, int idx);
extern int tty_release(struct inode *inode, struct file *filp);
extern void tty_init_termios(struct tty_struct *tty);
extern int tty_standard_install(struct tty_driver *driver,
@@ -656,7 +664,7 @@ extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty);
extern void tty_ldisc_release(struct tty_struct *tty);
extern void tty_ldisc_init(struct tty_struct *tty);
extern void tty_ldisc_deinit(struct tty_struct *tty);
-extern int tty_ldisc_receive_buf(struct tty_ldisc *ld, unsigned char *p,
+extern int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p,
char *f, int count);
/* n_tty.c */
diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h
index 99dbed8a8874..9ec741b133fe 100644
--- a/include/uapi/linux/serial_core.h
+++ b/include/uapi/linux/serial_core.h
@@ -56,7 +56,8 @@
#define PORT_ALTR_16550_F128 28 /* Altera 16550 UART with 128 FIFOs */
#define PORT_RT2880 29 /* Ralink RT2880 internal UART */
#define PORT_16550A_FSL64 30 /* Freescale 16550 UART with 64 FIFOs */
-#define PORT_MAX_8250 30 /* max port ID */
+#define PORT_DA830 31 /* TI DA8xx/66AK2x */
+#define PORT_MAX_8250 31 /* max port ID */
/*
* ARM specific type numbers. These are not currently guaranteed
diff --git a/include/uapi/linux/serial_reg.h b/include/uapi/linux/serial_reg.h
index b4c04842a8c0..5db76880b4ad 100644
--- a/include/uapi/linux/serial_reg.h
+++ b/include/uapi/linux/serial_reg.h
@@ -327,6 +327,14 @@
#define SERIAL_RSA_BAUD_BASE (921600)
#define SERIAL_RSA_BAUD_BASE_LO (SERIAL_RSA_BAUD_BASE / 8)
+/* Extra registers for TI DA8xx/66AK2x */
+#define UART_DA830_PWREMU_MGMT 12
+
+/* PWREMU_MGMT register bits */
+#define UART_DA830_PWREMU_MGMT_FREE (1 << 0) /* Free-running mode */
+#define UART_DA830_PWREMU_MGMT_URRST (1 << 13) /* Receiver reset/enable */
+#define UART_DA830_PWREMU_MGMT_UTRST (1 << 14) /* Transmitter reset/enable */
+
/*
* Extra serial register definitions for the internal UARTs
* in TI OMAP processors.
@@ -359,24 +367,6 @@
#define UART_OMAP_MDR1_DISABLE 0x07 /* Disable (default state) */
/*
- * These are definitions for the Exar XR17V35X and XR17(C|D)15X
- */
-#define UART_EXAR_8XMODE 0x88 /* 8X sampling rate select */
-#define UART_EXAR_SLEEP 0x8b /* Sleep mode */
-#define UART_EXAR_DVID 0x8d /* Device identification */
-
-#define UART_EXAR_FCTR 0x08 /* Feature Control Register */
-#define UART_FCTR_EXAR_IRDA 0x08 /* IrDa data encode select */
-#define UART_FCTR_EXAR_485 0x10 /* Auto 485 half duplex dir ctl */
-#define UART_FCTR_EXAR_TRGA 0x00 /* FIFO trigger table A */
-#define UART_FCTR_EXAR_TRGB 0x60 /* FIFO trigger table B */
-#define UART_FCTR_EXAR_TRGC 0x80 /* FIFO trigger table C */
-#define UART_FCTR_EXAR_TRGD 0xc0 /* FIFO trigger table D programmable */
-
-#define UART_EXAR_TXTRG 0x0a /* Tx FIFO trigger level write-only */
-#define UART_EXAR_RXTRG 0x0b /* Rx FIFO trigger level write-only */
-
-/*
* These are definitions for the Altera ALTR_16550_F32/F64/F128
* Normalized from 0x100 to 0x40 because of shift by 2 (32 bit regs).
*/
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