mirror of
https://github.com/torvalds/linux
synced 2024-10-24 04:06:04 +00:00
09aaf994e3
Bail out of UART access functions in uncompress.h if the uart port is not setup. This will happen when booting from DT since machine type matching does not work in this case. This may also happen if a correct machine type is not setup by bootloader. Signed-off-by: Sekhar Nori <nsekhar@ti.com>
105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
/*
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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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* arch/arm/plat-omap/include/mach/uncompress.h
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*
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* Original copyrights follow.
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*
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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/mach-types.h>
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#include <mach/serial.h>
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#define IOMEM(x) ((void __force __iomem *)(x))
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u32 *uart;
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/* PORT_16C550A, in polled non-fifo mode */
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static void putc(char c)
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{
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if (!uart)
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return;
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while (!(uart[UART_LSR] & UART_LSR_THRE))
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barrier();
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uart[UART_TX] = c;
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}
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static inline void flush(void)
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{
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if (!uart)
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return;
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while (!(uart[UART_LSR] & UART_LSR_THRE))
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barrier();
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}
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static inline void set_uart_info(u32 phys)
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{
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uart = (u32 *)phys;
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}
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#define _DEBUG_LL_ENTRY(machine, phys) \
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{ \
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if (machine_is_##machine()) { \
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set_uart_info(phys); \
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break; \
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} \
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}
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#define DEBUG_LL_DAVINCI(machine, port) \
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_DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE)
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#define DEBUG_LL_DA8XX(machine, port) \
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_DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE)
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#define DEBUG_LL_TNETV107X(machine, port) \
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_DEBUG_LL_ENTRY(machine, TNETV107X_UART##port##_BASE)
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static inline void __arch_decomp_setup(unsigned long arch_id)
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{
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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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/* Davinci boards */
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DEBUG_LL_DAVINCI(davinci_evm, 0);
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DEBUG_LL_DAVINCI(sffsdr, 0);
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DEBUG_LL_DAVINCI(neuros_osd2, 0);
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DEBUG_LL_DAVINCI(davinci_dm355_evm, 0);
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DEBUG_LL_DAVINCI(dm355_leopard, 0);
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DEBUG_LL_DAVINCI(davinci_dm6467_evm, 0);
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DEBUG_LL_DAVINCI(davinci_dm365_evm, 0);
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/* DA8xx boards */
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DEBUG_LL_DA8XX(davinci_da830_evm, 2);
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DEBUG_LL_DA8XX(davinci_da850_evm, 2);
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DEBUG_LL_DA8XX(mityomapl138, 1);
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DEBUG_LL_DA8XX(omapl138_hawkboard, 2);
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/* TNETV107x boards */
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DEBUG_LL_TNETV107X(tnetv107x, 1);
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} while (0);
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}
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#define arch_decomp_setup() __arch_decomp_setup(arch_id)
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#define arch_decomp_wdog()
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