diff options
| author | Dave Aldridge <fovsoft@gmail.com> | 2011-09-01 22:47:14 +0000 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2011-10-01 21:54:16 +0200 |
| commit | 79df1208ee6984aa63468673c042667d121bb0bc (patch) | |
| tree | c0943501442703bfed2dc2fb2984557588e6d5c2 | |
| parent | b18eabfa5fad24e7046903208c72af82d7e01cdd (diff) | |
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: Dave Aldridge <fovsoft@gmail.com>
| -rw-r--r-- | drivers/serial/ns16550.c | 6 | ||||
| -rw-r--r-- | include/ns16550.h | 4 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index 8eeb48fb2a..0174744dfe 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -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) diff --git a/include/ns16550.h b/include/ns16550.h index 9ea81e9463..51f1c17b31 100644 --- a/include/ns16550.h +++ b/include/ns16550.h @@ -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]; \ |