Commit 79df1208 authored by Dave Aldridge's avatar Dave Aldridge Committed by Wolfgang Denk
Browse files

ns16550: change to allow 32 bit access to registers



If CONFIG_SYS_NS16550_MEM32 is defined then 32 bit memory
mapped access will be used to read/write the uart registers.

This is especially useful for SoC devices that implement 16550
compatible uarts but that have peripheral access width constraints.
Signed-off-by: default avatarDave Aldridge <fovsoft@gmail.com>
parent b18eabfa
......@@ -19,6 +19,12 @@
#ifdef CONFIG_SYS_NS16550_PORT_MAPPED
#define serial_out(x,y) outb(x,(ulong)y)
#define serial_in(y) inb((ulong)y)
#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE > 0)
#define serial_out(x,y) out_be32(y,x)
#define serial_in(y) in_be32(y)
#elif defined(CONFIG_SYS_NS16550_MEM32) && (CONFIG_SYS_NS16550_REG_SIZE < 0)
#define serial_out(x,y) out_le32(y,x)
#define serial_in(y) in_le32(y)
#else
#define serial_out(x,y) writeb(x,y)
#define serial_in(y) readb(y)
......
......@@ -21,8 +21,12 @@
* will not allocate storage for arrays of size 0
*/
#include <linux/types.h>
#if !defined(CONFIG_SYS_NS16550_REG_SIZE) || (CONFIG_SYS_NS16550_REG_SIZE == 0)
#error "Please define NS16550 registers size."
#elif defined(CONFIG_SYS_NS16550_MEM32)
#define UART_REG(x) u32 x
#elif (CONFIG_SYS_NS16550_REG_SIZE > 0)
#define UART_REG(x) \
unsigned char prepad_##x[CONFIG_SYS_NS16550_REG_SIZE - 1]; \
......
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