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Diffstat (limited to 'include/linux/serialP.h')
| -rw-r--r-- | include/linux/serialP.h | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/include/linux/serialP.h b/include/linux/serialP.h new file mode 100644 index 00000000000..e811a615f69 --- /dev/null +++ b/include/linux/serialP.h @@ -0,0 +1,142 @@ +/* + * Private header file for the (dumb) serial driver + * + * Copyright (C) 1997 by Theodore Ts'o. + * + * Redistribution of this file is permitted under the terms of the GNU + * Public License (GPL) + */ + +#ifndef _LINUX_SERIALP_H +#define _LINUX_SERIALP_H + +/* + * This is our internal structure for each serial port's state. + * + * Many fields are paralleled by the structure used by the serial_struct + * structure. + * + * For definitions of the flags field, see tty.h + */ + +#include <linux/termios.h> +#include <linux/workqueue.h> +#include <linux/interrupt.h> +#include <linux/circ_buf.h> +#include <linux/wait.h> + +struct serial_state { + int magic; + int baud_base; + unsigned long port; + int irq; + int flags; + int hub6; + int type; + int line; + int revision; /* Chip revision (950) */ + int xmit_fifo_size; + int custom_divisor; + int count; + u8 *iomem_base; + u16 iomem_reg_shift; + unsigned short close_delay; + unsigned short closing_wait; /* time to wait before closing */ + struct async_icount icount; + int io_type; + struct async_struct *info; + struct pci_dev *dev; +}; + +struct async_struct { + int magic; + unsigned long port; + int hub6; + int flags; + int xmit_fifo_size; + struct serial_state *state; + struct tty_struct *tty; + int read_status_mask; + int ignore_status_mask; + int timeout; + int quot; + int x_char; /* xon/xoff character */ + int close_delay; + unsigned short closing_wait; + unsigned short closing_wait2; /* obsolete */ + int IER; /* Interrupt Enable Register */ + int MCR; /* Modem control register */ + int LCR; /* Line control register */ + int ACR; /* 16950 Additional Control Reg. */ + unsigned long event; + unsigned long last_active; + int line; + int blocked_open; /* # of blocked opens */ + struct circ_buf xmit; + spinlock_t xmit_lock; + u8 *iomem_base; + u16 iomem_reg_shift; + int io_type; + struct work_struct work; + struct tasklet_struct tlet; +#ifdef DECLARE_WAITQUEUE + wait_queue_head_t open_wait; + wait_queue_head_t close_wait; + wait_queue_head_t delta_msr_wait; +#else + struct wait_queue *open_wait; + struct wait_queue *close_wait; + struct wait_queue *delta_msr_wait; +#endif + struct async_struct *next_port; /* For the linked list */ + struct async_struct *prev_port; +}; + +#define CONFIGURED_SERIAL_PORT(info) ((info)->port || ((info)->iomem_base)) + +#define SERIAL_MAGIC 0x5301 +#define SSTATE_MAGIC 0x5302 + +/* + * Events are used to schedule things to happen at timer-interrupt + * time, instead of at rs interrupt time. + */ +#define RS_EVENT_WRITE_WAKEUP 0 + +/* + * Multiport serial configuration structure --- internal structure + */ +struct rs_multiport_struct { + int port1; + unsigned char mask1, match1; + int port2; + unsigned char mask2, match2; + int port3; + unsigned char mask3, match3; + int port4; + unsigned char mask4, match4; + int port_monitor; +}; + +#if defined(__alpha__) && !defined(CONFIG_PCI) +/* + * Digital did something really horribly wrong with the OUT1 and OUT2 + * lines on at least some ALPHA's. The failure mode is that if either + * is cleared, the machine locks up with endless interrupts. + * + * This is still used by arch/mips/au1000/common/serial.c for some weird + * reason (mips != alpha!) + */ +#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1) +#elif defined(CONFIG_SBC8560) +/* + * WindRiver did something similarly broken on their SBC8560 board. The + * UART tristates its IRQ output while OUT2 is clear, but they pulled + * the interrupt line _up_ instead of down, so if we register the IRQ + * while the UART is in that state, we die in an IRQ storm. */ +#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2) +#else +#define ALPHA_KLUDGE_MCR 0 +#endif + +#endif /* _LINUX_SERIAL_H */ |