mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 07:34:06 +08:00
1c2f04937b
There is currently no provision for passing IRQ trigger flags for serial IRQs with triggering requirements (such as GPIO IRQs) This patch adds irqflags to plat_serial8250_port that can be passed from board file to reqest_irq() of 8250 driver Changes are backward compatible with boards passing UPF_SHARE_IRQ flag Tested on Zoom2 board that has IRQF_TRIGGER_RISING requirement for 8250 irq [Moved new flag to end to fix bugs in the original with the old_serial array -- Alan] Signed-off-by: Vikram Pandita <vikram.pandita@ti.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/*
|
|
* 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
|