a3ed495190
To share the same kernel image amon different machines we have added the machtype command line support. In the old serial port implementation the UART base address is hardcoded as a macro in machine.h which breaks with machtype, so change that to discover the address dynamically. Also move the initialization of the UART base address to uart_base.c to avoid remapping twice for early_printk.c and serial.c. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/581/ Patchwork: http://patchwork.linux-mips.org/patch/682/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
71 lines
1.9 KiB
C
71 lines
1.9 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
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*
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* Copyright (C) 2009 Lemote, Inc.
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* Author: Yan hua (yanhua@lemote.com)
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* Author: Wu Zhangjin (wuzj@lemote.com)
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*/
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#include <linux/io.h>
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#include <linux/init.h>
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#include <linux/serial_8250.h>
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#include <asm/bootinfo.h>
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#include <loongson.h>
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#include <machine.h>
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#define PORT(int) \
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{ \
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.irq = int, \
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.uartclk = 1843200, \
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.iotype = UPIO_PORT, \
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \
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.regshift = 0, \
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}
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#define PORT_M(int) \
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{ \
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.irq = MIPS_CPU_IRQ_BASE + (int), \
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.uartclk = 3686400, \
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.iotype = UPIO_MEM, \
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.membase = (void __iomem *)NULL, \
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \
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.regshift = 0, \
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}
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static struct plat_serial8250_port uart8250_data[][2] = {
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[MACH_LOONGSON_UNKNOWN] {},
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[MACH_LEMOTE_FL2E] {PORT(4), {} },
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[MACH_LEMOTE_FL2F] {PORT(3), {} },
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[MACH_LEMOTE_ML2F7] {PORT_M(3), {} },
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[MACH_LEMOTE_YL2F89] {PORT_M(3), {} },
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[MACH_DEXXON_GDIUM2F10] {PORT_M(3), {} },
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[MACH_LOONGSON_END] {},
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};
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static struct platform_device uart8250_device = {
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.name = "serial8250",
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.id = PLAT8250_DEV_PLATFORM,
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};
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static int __init serial_init(void)
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{
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if (uart8250_data[mips_machtype][0].iotype == UPIO_MEM)
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uart8250_data[mips_machtype][0].membase =
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(void __iomem *)_loongson_uart_base;
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else if (uart8250_data[mips_machtype][0].iotype == UPIO_PORT)
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uart8250_data[mips_machtype][0].iobase =
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uart8250_base[mips_machtype] - LOONGSON_PCIIO_BASE;
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uart8250_device.dev.platform_data = uart8250_data[mips_machtype];
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return platform_device_register(&uart8250_device);
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}
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device_initcall(serial_init);
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