diff options
Diffstat (limited to 'drivers/tty/serial/8250.h')
| -rw-r--r-- | drivers/tty/serial/8250.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250.h b/drivers/tty/serial/8250.h new file mode 100644 index 000000000000..6e19ea3e48d5 --- /dev/null +++ b/drivers/tty/serial/8250.h @@ -0,0 +1,80 @@ +/* + * linux/drivers/char/8250.h + * + * Driver for 8250/16550-type serial ports + * + * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. + * + * Copyright (C) 2001 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. + */ + +#include <linux/serial_8250.h> + +struct old_serial_port { + unsigned int uart; + unsigned int baud_base; + unsigned int port; + unsigned int irq; + unsigned int flags; + unsigned char hub6; + unsigned char io_type; + unsigned char *iomem_base; + unsigned short iomem_reg_shift; + unsigned long irqflags; +}; + +/* + * This replaces serial_uart_config in include/linux/serial.h + */ +struct serial8250_config { + const char *name; + unsigned short fifo_size; + unsigned short tx_loadsz; + unsigned char fcr; + unsigned int flags; +}; + +#define UART_CAP_FIFO (1 << 8) /* UART has FIFO */ +#define UART_CAP_EFR (1 << 9) /* UART has EFR */ +#define UART_CAP_SLEEP (1 << 10) /* UART has IER sleep */ +#define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */ +#define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */ + +#define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */ +#define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */ +#define UART_BUG_NOMSR (1 << 2) /* UART has buggy MSR status bits (Au1x00) */ +#define UART_BUG_THRE (1 << 3) /* UART has buggy THRE reassertion */ + +#define PROBE_RSA (1 << 0) +#define PROBE_ANY (~0) + +#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8) + +#ifdef CONFIG_SERIAL_8250_SHARE_IRQ +#define SERIAL8250_SHARE_IRQS 1 +#else +#define SERIAL8250_SHARE_IRQS 0 +#endif + +#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. + */ +#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 |