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baeb7ef349
The kbuild test robot wrote me: | make.cross ARCH=powerpc |>> ERROR: ".__xchg_called_with_bad_pointer" [drivers/tty/serial/8250/8250.ko] undefined! The generic implementation of xchg() on arm and x86 works for variables of size one bye (char). According to the report powerpc does not support xchg() for one byte sized variables and looking further it seems also to be the same case for sparc and tile (or for 10 out of 26 architectures which provide a custom implementation). For that reason I increase the size of the variable from one to four bytes to get it work on powerpc (and the others). Reported-By: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
142 lines
4.7 KiB
C
142 lines
4.7 KiB
C
/*
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* linux/include/linux/serial_8250.h
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*
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* Copyright (C) 2004 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef _LINUX_SERIAL_8250_H
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#define _LINUX_SERIAL_8250_H
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#include <linux/serial_core.h>
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#include <linux/platform_device.h>
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/*
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* This is the platform device platform_data structure
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*/
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struct plat_serial8250_port {
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unsigned long iobase; /* io base address */
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void __iomem *membase; /* ioremap cookie or NULL */
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resource_size_t mapbase; /* resource base */
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unsigned int irq; /* interrupt number */
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unsigned long irqflags; /* request_irq flags */
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unsigned int uartclk; /* UART clock rate */
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void *private_data;
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unsigned char regshift; /* register shift */
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unsigned char iotype; /* UPIO_* */
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unsigned char hub6;
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upf_t flags; /* UPF_* flags */
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unsigned int type; /* If UPF_FIXED_TYPE */
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unsigned int (*serial_in)(struct uart_port *, int);
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void (*serial_out)(struct uart_port *, int, int);
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void (*set_termios)(struct uart_port *,
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struct ktermios *new,
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struct ktermios *old);
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int (*handle_irq)(struct uart_port *);
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void (*pm)(struct uart_port *, unsigned int state,
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unsigned old);
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void (*handle_break)(struct uart_port *);
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};
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/*
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* Allocate 8250 platform device IDs. Nothing is implied by
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* the numbering here, except for the legacy entry being -1.
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*/
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enum {
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PLAT8250_DEV_LEGACY = -1,
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PLAT8250_DEV_PLATFORM,
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PLAT8250_DEV_PLATFORM1,
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PLAT8250_DEV_PLATFORM2,
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PLAT8250_DEV_FOURPORT,
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PLAT8250_DEV_ACCENT,
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PLAT8250_DEV_BOCA,
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PLAT8250_DEV_EXAR_ST16C554,
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PLAT8250_DEV_HUB6,
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PLAT8250_DEV_AU1X00,
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PLAT8250_DEV_SM501,
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};
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struct uart_8250_dma;
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/*
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* This should be used by drivers which want to register
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* their own 8250 ports without registering their own
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* platform device. Using these will make your driver
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* dependent on the 8250 driver.
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*/
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struct uart_8250_port {
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struct uart_port port;
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struct timer_list timer; /* "no irq" timer */
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struct list_head list; /* ports on this IRQ */
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unsigned short capabilities; /* port capabilities */
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unsigned short bugs; /* port bugs */
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bool fifo_bug; /* min RX trigger if enabled */
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unsigned int tx_loadsz; /* transmit fifo load size */
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unsigned char acr;
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unsigned char fcr;
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unsigned char ier;
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unsigned char lcr;
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unsigned char mcr;
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unsigned char mcr_mask; /* mask of user bits */
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unsigned char mcr_force; /* mask of forced bits */
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unsigned char cur_iotype; /* Running I/O type */
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unsigned int rpm_tx_active;
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/*
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* Some bits in registers are cleared on a read, so they must
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* be saved whenever the register is read but the bits will not
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* be immediately processed.
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*/
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#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS
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unsigned char lsr_saved_flags;
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#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
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unsigned char msr_saved_flags;
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struct uart_8250_dma *dma;
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struct serial_rs485 rs485;
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/* 8250 specific callbacks */
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int (*dl_read)(struct uart_8250_port *);
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void (*dl_write)(struct uart_8250_port *, int);
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int (*rs485_config)(struct uart_8250_port *,
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struct serial_rs485 *rs485);
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};
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static inline struct uart_8250_port *up_to_u8250p(struct uart_port *up)
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{
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return container_of(up, struct uart_8250_port, port);
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}
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int serial8250_register_8250_port(struct uart_8250_port *);
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void serial8250_unregister_port(int line);
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void serial8250_suspend_port(int line);
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void serial8250_resume_port(int line);
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extern int early_serial_setup(struct uart_port *port);
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extern int serial8250_find_port(struct uart_port *p);
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extern int serial8250_find_port_for_earlycon(void);
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extern unsigned int serial8250_early_in(struct uart_port *port, int offset);
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extern void serial8250_early_out(struct uart_port *port, int offset, int value);
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extern int setup_early_serial8250_console(char *cmdline);
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extern void serial8250_do_set_termios(struct uart_port *port,
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struct ktermios *termios, struct ktermios *old);
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extern int serial8250_do_startup(struct uart_port *port);
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extern void serial8250_do_shutdown(struct uart_port *port);
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extern void serial8250_do_pm(struct uart_port *port, unsigned int state,
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unsigned int oldstate);
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extern int fsl8250_handle_irq(struct uart_port *port);
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int serial8250_handle_irq(struct uart_port *port, unsigned int iir);
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unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr);
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void serial8250_tx_chars(struct uart_8250_port *up);
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unsigned int serial8250_modem_status(struct uart_8250_port *up);
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extern void serial8250_set_isa_configurator(void (*v)
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(int port, struct uart_port *up,
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unsigned short *capabilities));
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#endif
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