/*
* Serial port stubs for kernel decompress status messages
*
* Initially based on:
* arch/arm/plat-omap/include/mach/uncompress.h
*
* Original copyrights follow.
*
* Copyright (C) 2000 RidgeRun, Inc.
* Author: Greg Lonnon <glonnon@ridgerun.com>
*
* Rewritten by:
* Author: <source@mvista.com>
* 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/mach-types.h>
#include <mach/serial.h>
u32 *uart;
/* PORT_16C550A, in polled non-fifo mode */
static void putc(char c)
{
while (!(uart[UART_LSR] & UART_LSR_THRE))
barrier();
uart[UART_TX] = c;
}
static inline void flush(void)
{
while (!(uart[UART_LSR] & UART_LSR_THRE))
barrier();
}
static inline void set_uart_info(u32 phys, void * __iomem virt)
{
/*
* Get address of some.bss variable and round it down
* a la CONFIG_AUTO_ZRELADDR.
*/
u32 ram_start = (u32)&uart & 0xf8000000;
u32 *uart_info = (u32 *)(ram_start + DAVINCI_UART_INFO_OFS);
uart = (u32 *)phys;
uart_info[0] = phys;
uart_info[1] = (u32)virt;
}
#define _DEBUG_LL_ENTRY(machine, phys, virt) \
if (machine_is_##machine()) { \
set_uart_info(phys, virt); \
break; \
}
#define DEBUG_LL_DAVINCI(machine, port) \
_DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE, \
IO_ADDRESS(DAVINCI_UART##port##_BASE))
#define DEBUG_LL_DA8XX(machine, port) \
_DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE, \
IO_ADDRESS(DA8XX_UART##port##_BASE))
#define DEBUG_LL_TNETV107X(machine, port) \
_DEBUG_LL_ENTRY(machine, TNETV107X_UART##port##_BASE, \
TNETV107X_UART##port##_VIRT)
static inline void __arch_decomp_setup(unsigned long arch_id)
{
/*
* 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 {
/* Davinci boards */
DEBUG_LL_DAVINCI(davinci_evm, 0);
DEBUG_LL_DAVINCI(sffsdr, 0);
DEBUG_LL_DAVINCI(neuros_osd2, 0);
DEBUG_LL_DAVINCI(davinci_dm355_evm, 0);
DEBUG_LL_DAVINCI(dm355_leopard, 0);
DEBUG_LL_DAVINCI(davinci_dm6467_evm, 0);
DEBUG_LL_DAVINCI(davinci_dm365_evm, 0);
/* DA8xx boards */
DEBUG_LL_DA8XX(davinci_da830_evm, 2);
DEBUG_LL_DA8XX(davinci_da850_evm, 2);
DEBUG_LL_DA8XX(mityomapl138, 1);
DEBUG_LL_DA8XX(omapl138_hawkboard, 2);
/* TNETV107x boards */
DEBUG_LL_TNETV107X(tnetv107x, 1);
} while (0);
}
#define arch_decomp_setup() __arch_decomp_setup(arch_id)
#define arch_decomp_wdog()
