diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/console.h | 4 | ||||
| -rw-r--r-- | include/linux/serdev.h | 262 | ||||
| -rw-r--r-- | include/linux/serial_core.h | 2 | ||||
| -rw-r--r-- | include/linux/serial_sci.h | 15 | ||||
| -rw-r--r-- | include/linux/tty.h | 12 | ||||
| -rw-r--r-- | include/uapi/linux/serial_core.h | 3 | ||||
| -rw-r--r-- | include/uapi/linux/serial_reg.h | 26 |
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). */ |
