android_kernel_motorola_sm6225/arch/mips/boot/compressed/uart-16550.c
Paul Gortmaker 3b2663ca84 mips: delete non-required instances of include <linux/init.h>
None of these files are actually using any __init type directives
and hence don't need to include <linux/init.h>.  Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6320/
2014-01-24 22:39:56 +01:00

63 lines
1.3 KiB
C

/*
* 16550 compatible uart based serial debug support for zboot
*/
#include <linux/types.h>
#include <linux/serial_reg.h>
#include <asm/addrspace.h>
#if defined(CONFIG_MACH_LOONGSON) || defined(CONFIG_MIPS_MALTA)
#define UART_BASE 0x1fd003f8
#define PORT(offset) (CKSEG1ADDR(UART_BASE) + (offset))
#endif
#ifdef CONFIG_AR7
#include <ar7.h>
#define PORT(offset) (CKSEG1ADDR(AR7_REGS_UART0) + (4 * offset))
#endif
#ifdef CONFIG_MACH_JZ4740
#include <asm/mach-jz4740/base.h>
#define PORT(offset) (CKSEG1ADDR(JZ4740_UART0_BASE_ADDR) + (4 * offset))
#endif
#ifdef CONFIG_CPU_XLR
#define UART0_BASE 0x1EF14000
#define PORT(offset) (CKSEG1ADDR(UART0_BASE) + (4 * offset))
#define IOTYPE unsigned int
#endif
#ifdef CONFIG_CPU_XLP
#define UART0_BASE 0x18030100
#define PORT(offset) (CKSEG1ADDR(UART0_BASE) + (4 * offset))
#define IOTYPE unsigned int
#endif
#ifndef IOTYPE
#define IOTYPE char
#endif
#ifndef PORT
#error please define the serial port address for your own machine
#endif
static inline unsigned int serial_in(int offset)
{
return *((volatile IOTYPE *)PORT(offset)) & 0xFF;
}
static inline void serial_out(int offset, int value)
{
*((volatile IOTYPE *)PORT(offset)) = value & 0xFF;
}
void putc(char c)
{
int timeout = 1000000;
while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
;
serial_out(UART_TX, c);
}