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Diffstat (limited to 'kernel/include/linux/serial_8250.h')
| -rw-r--r-- | kernel/include/linux/serial_8250.h | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/kernel/include/linux/serial_8250.h b/kernel/include/linux/serial_8250.h new file mode 100644 index 000000000..78097e7a3 --- /dev/null +++ b/kernel/include/linux/serial_8250.h @@ -0,0 +1,157 @@ +/* + * linux/include/linux/serial_8250.h + * + * Copyright (C) 2004 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ +#ifndef _LINUX_SERIAL_8250_H +#define _LINUX_SERIAL_8250_H + +#include <linux/serial_core.h> +#include <linux/platform_device.h> + +/* + * This is the platform device platform_data structure + */ +struct plat_serial8250_port { + unsigned long iobase; /* io base address */ + void __iomem *membase; /* ioremap cookie or NULL */ + resource_size_t mapbase; /* resource base */ + unsigned int irq; /* interrupt number */ + unsigned long irqflags; /* request_irq flags */ + unsigned int uartclk; /* UART clock rate */ + void *private_data; + unsigned char regshift; /* register shift */ + unsigned char iotype; /* UPIO_* */ + unsigned char hub6; + upf_t flags; /* UPF_* flags */ + unsigned int type; /* If UPF_FIXED_TYPE */ + unsigned int (*serial_in)(struct uart_port *, int); + void (*serial_out)(struct uart_port *, int, int); + void (*set_termios)(struct uart_port *, + struct ktermios *new, + struct ktermios *old); + int (*handle_irq)(struct uart_port *); + void (*pm)(struct uart_port *, unsigned int state, + unsigned old); + void (*handle_break)(struct uart_port *); +}; + +/* + * Allocate 8250 platform device IDs. Nothing is implied by + * the numbering here, except for the legacy entry being -1. + */ +enum { + PLAT8250_DEV_LEGACY = -1, + PLAT8250_DEV_PLATFORM, + PLAT8250_DEV_PLATFORM1, + PLAT8250_DEV_PLATFORM2, + PLAT8250_DEV_FOURPORT, + PLAT8250_DEV_ACCENT, + PLAT8250_DEV_BOCA, + PLAT8250_DEV_EXAR_ST16C554, + PLAT8250_DEV_HUB6, + PLAT8250_DEV_AU1X00, + PLAT8250_DEV_SM501, +}; + +struct uart_8250_dma; +struct uart_8250_port; + +/** + * 8250 core driver operations + * + * @setup_irq() Setup irq handling. The universal 8250 driver links this + * port to the irq chain. Other drivers may @request_irq(). + * @release_irq() Undo irq handling. The universal 8250 driver unlinks + * the port from the irq chain. + */ +struct uart_8250_ops { + int (*setup_irq)(struct uart_8250_port *); + void (*release_irq)(struct uart_8250_port *); +}; + +/* + * This should be used by drivers which want to register + * their own 8250 ports without registering their own + * platform device. Using these will make your driver + * dependent on the 8250 driver. + */ + +struct uart_8250_port { + struct uart_port port; + struct timer_list timer; /* "no irq" timer */ + struct list_head list; /* ports on this IRQ */ + unsigned short capabilities; /* port capabilities */ + unsigned short bugs; /* port bugs */ + bool fifo_bug; /* min RX trigger if enabled */ + unsigned int tx_loadsz; /* transmit fifo load size */ + unsigned char acr; + unsigned char fcr; + unsigned char ier; + unsigned char lcr; + unsigned char mcr; + unsigned char mcr_mask; /* mask of user bits */ + unsigned char mcr_force; /* mask of forced bits */ + unsigned char cur_iotype; /* Running I/O type */ + unsigned int rpm_tx_active; + unsigned char canary; /* non-zero during system sleep + * if no_console_suspend + */ + unsigned char probe; +#define UART_PROBE_RSA (1 << 0) + + /* + * Some bits in registers are cleared on a read, so they must + * be saved whenever the register is read but the bits will not + * be immediately processed. + */ +#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS + unsigned char lsr_saved_flags; +#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA + unsigned char msr_saved_flags; + + struct uart_8250_dma *dma; + const struct uart_8250_ops *ops; + + /* 8250 specific callbacks */ + int (*dl_read)(struct uart_8250_port *); + void (*dl_write)(struct uart_8250_port *, int); +}; + +static inline struct uart_8250_port *up_to_u8250p(struct uart_port *up) +{ + return container_of(up, struct uart_8250_port, port); +} + +int serial8250_register_8250_port(struct uart_8250_port *); +void serial8250_unregister_port(int line); +void serial8250_suspend_port(int line); +void serial8250_resume_port(int line); + +extern int early_serial_setup(struct uart_port *port); + +extern unsigned int serial8250_early_in(struct uart_port *port, int offset); +extern void serial8250_early_out(struct uart_port *port, int offset, int value); +extern void serial8250_do_set_termios(struct uart_port *port, + struct ktermios *termios, struct ktermios *old); +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, + unsigned int oldstate); +extern void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl); +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, + unsigned short *capabilities)); + +#endif |