mirror of
https://github.com/edk2-porting/linux-next.git
synced 2025-01-01 10:03:22 +08:00
4b71598b6a
This structure might have made sense many years ago, but at this point it is only used in one specific driver, and referenced in stale comments elsewhere. Rather than change the sunsu.c driver, simply move the struct to be within the exclusive domain of that driver, so it won't get inadvertently picked up and used by other serial drivers going forward. The comments referencing the now driver specific struct are updated accordingly. Note that 8250.c has a struct that is similar in usage, with the name serial8250_config; but is 100% independent and untouched here. Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
100 lines
3.0 KiB
C
100 lines
3.0 KiB
C
/*
|
|
* 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;
|
|
};
|
|
|
|
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_CAP_RTOIE (1 << 13) /* UART needs IER bit 4 set (Xscale, Tegra) */
|
|
|
|
#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 UART_BUG_PARITY (1 << 4) /* UART mishandles parity if FIFO enabled */
|
|
|
|
#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
|
|
|
|
static inline int serial_in(struct uart_8250_port *up, int offset)
|
|
{
|
|
return up->port.serial_in(&up->port, offset);
|
|
}
|
|
|
|
static inline void serial_out(struct uart_8250_port *up, int offset, int value)
|
|
{
|
|
up->port.serial_out(&up->port, offset, value);
|
|
}
|
|
|
|
void serial8250_clear_and_reinit_fifos(struct uart_8250_port *p);
|
|
|
|
static inline int serial_dl_read(struct uart_8250_port *up)
|
|
{
|
|
return up->dl_read(up);
|
|
}
|
|
|
|
static inline void serial_dl_write(struct uart_8250_port *up, int value)
|
|
{
|
|
up->dl_write(up, value);
|
|
}
|
|
|
|
#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
|