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/*
* arch/arm/plat-omap/include/mach/uncompress.h
*
* Serial port stubs for kernel decompress status messages
*
* Initially based on:
* linux-2.4.15-rmk1-dsplinux1.6/arch/arm/plat-omap/include/mach1510/uncompress.h
* Copyright (C) 2000 RidgeRun, Inc.
* Author: Greg Lonnon <[email protected]>
*
* Rewritten by:
* Author: <[email protected]>
* 2004 (c) MontaVista Software, Inc.
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/types.h>
#include <linux/serial_reg.h>
#include <asm/memory.h>
#include <asm/mach-types.h>
#include "serial.h"
#define MDR1_MODE_MASK 0x07
volatile u8 *uart_base;
int uart_shift;
/*
* Store the DEBUG_LL uart number into memory.
* See also debug-macro.S, and serial.c for related code.
*/
static void set_omap_uart_info(unsigned char port)
{
/*
* Get address of some.bss variable and round it down
* a la CONFIG_AUTO_ZRELADDR.
*/
u32 ram_start = (u32)&uart_shift & 0xf8000000;
u32 *uart_info = (u32 *)(ram_start + OMAP_UART_INFO_OFS);
*uart_info = port;
}
static inline void putc(int c)
{
if (!uart_base)
return;
/* Check for UART 16x mode */
if ((uart_base[UART_OMAP_MDR1 << uart_shift] & MDR1_MODE_MASK) != 0)
return;
while (!(uart_base[UART_LSR << uart_shift] & UART_LSR_THRE))
barrier();
uart_base[UART_TX << uart_shift] = c;
}
static inline void flush(void)
{
}
/*
* Macros to configure UART1 and debug UART
*/
#define _DEBUG_LL_ENTRY(mach, dbg_uart, dbg_shft, dbg_id) \
if (machine_is_##mach()) { \
uart_base = (volatile u8 *)(dbg_uart); \
uart_shift = (dbg_shft); \
port = (dbg_id); \
set_omap_uart_info(port); \
break; \
}
#define DEBUG_LL_OMAP7XX(p, mach) \
_DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP7XX_PORT_SHIFT, \
OMAP1UART##p)
#define DEBUG_LL_OMAP1(p, mach) \
_DEBUG_LL_ENTRY(mach, OMAP1_UART##p##_BASE, OMAP_PORT_SHIFT, \
OMAP1UART##p)
static inline void arch_decomp_setup(void)
{
int port = 0;
/*
* Initialize the port based on the machine ID from the bootloader.
* Note that we're using macros here instead of switch statement
* as machine_is functions are optimized out for the boards that
* are not selected.
*/
do {
/* omap7xx/8xx based boards using UART1 with shift 0 */
DEBUG_LL_OMAP7XX(1, herald);
DEBUG_LL_OMAP7XX(1, omap_perseus2);
/* omap15xx/16xx based boards using UART1 */
DEBUG_LL_OMAP1(1, ams_delta);
DEBUG_LL_OMAP1(1, nokia770);
DEBUG_LL_OMAP1(1, omap_h2);
DEBUG_LL_OMAP1(1, omap_h3);
DEBUG_LL_OMAP1(1, omap_innovator);
DEBUG_LL_OMAP1(1, omap_osk);
DEBUG_LL_OMAP1(1, omap_palmte);
DEBUG_LL_OMAP1(1, omap_palmz71);
/* omap15xx/16xx based boards using UART2 */
DEBUG_LL_OMAP1(2, omap_palmtt);
/* omap15xx/16xx based boards using UART3 */
DEBUG_LL_OMAP1(3, sx1);
} while (0);
}
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