c3d8d85019
This patchs uses a loongson_uart_base variable instead of the uart_base[] array and adds a new kernel option to avoid to compile uart_base.c all the time, which will save a little bit of memory for us. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: linux-mips@linux-mips.org http://patchwork.linux-mips.org/patch/727/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
76 lines
2 KiB
C
76 lines
2 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_LEMOTE_NAS] {PORT_M(3), {} },
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[MACH_LEMOTE_LL2F] {PORT(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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unsigned char iotype;
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iotype = uart8250_data[mips_machtype][0].iotype;
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if (UPIO_MEM == iotype)
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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 (UPIO_PORT == iotype)
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uart8250_data[mips_machtype][0].iobase =
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loongson_uart_base - 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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