Commit be1b4d34 authored by Grant Likely's avatar Grant Likely Committed by Josh Boyer
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[POWERPC] Uartlite: Add macros for register names 



Add macros to define register names to improve readability.

Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: default avatarJosh Boyer <jwboyer@linux.vnet.ibm.com>
parent 69c9c943

arch/powerpc/boot/uartlite.c

+21 −6
Original line number Diff line number Diff line
@@ -16,30 +16,45 @@ 
#include "io.h"

#include "ops.h"



#define ULITE_RX		0x00

#define ULITE_TX		0x04

#define ULITE_STATUS		0x08

#define ULITE_CONTROL		0x0c



#define ULITE_STATUS_RXVALID	0x01

#define ULITE_STATUS_TXFULL	0x08



#define ULITE_CONTROL_RST_RX	0x02



static void * reg_base;



static int uartlite_open(void)

{

	/* Clear the RX FIFO */

	out_be32(reg_base + 0x0C, 0x2);

	out_be32(reg_base + ULITE_CONTROL, ULITE_CONTROL_RST_RX);

	return 0;

}



static void uartlite_putc(unsigned char c)

{

	while ((in_be32(reg_base + 0x8) & 0x08) != 0); /* spin */

	out_be32(reg_base + 0x4, c);

	u32 reg = ULITE_STATUS_TXFULL;

	while (reg & ULITE_STATUS_TXFULL) /* spin on TXFULL bit */

		reg = in_be32(reg_base + ULITE_STATUS);

	out_be32(reg_base + ULITE_TX, c);

}



static unsigned char uartlite_getc(void)

{

	while ((in_be32(reg_base + 0x8) & 0x01) == 0); /* spin */

	return in_be32(reg_base);

	u32 reg = ULITE_STATUS_RXVALID;

	while (reg & ULITE_STATUS_RXVALID) /* spin on RXVALID bit */

		reg = in_be32(reg_base + ULITE_STATUS);

	return in_be32(reg_base + ULITE_RX);

}



static u8 uartlite_tstc(void)

{

	return ((in_be32(reg_base + 0x8) & 0x01) != 0);

	u32 reg = in_be32(reg_base + ULITE_STATUS);

	return reg & ULITE_STATUS_RXVALID;

}



int uartlite_console_init(void *devp, struct serial_console_data *scdp)