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