118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
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/*
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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 (wuzhangjin@gmail.com)
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*/
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#include <linux/io.h>
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#include <linux/module.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, clk) \
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{ \
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.irq = int, \
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.uartclk = clk, \
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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, clk) \
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{ \
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.irq = MIPS_CPU_IRQ_BASE + (int), \
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.uartclk = clk, \
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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[][MAX_UARTS + 1] = {
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[MACH_LOONGSON_UNKNOWN] = {},
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[MACH_LEMOTE_FL2E] = {PORT(4, 1843200), {} },
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[MACH_LEMOTE_FL2F] = {PORT(3, 1843200), {} },
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[MACH_LEMOTE_ML2F7] = {PORT_M(3, 3686400), {} },
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[MACH_LEMOTE_YL2F89] = {PORT_M(3, 3686400), {} },
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[MACH_DEXXON_GDIUM2F10] = {PORT_M(3, 3686400), {} },
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[MACH_LEMOTE_NAS] = {PORT_M(3, 3686400), {} },
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[MACH_LEMOTE_LL2F] = {PORT(3, 1843200), {} },
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[MACH_LOONGSON_GENERIC] = {PORT_M(2, 25000000), {} },
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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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int i;
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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].mapbase =
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loongson_uart_base[0];
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uart8250_data[mips_machtype][0].membase =
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(void __iomem *)_loongson_uart_base[0];
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}
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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[0] - LOONGSON_PCIIO_BASE;
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if (loongson_sysconf.uarts[0].uartclk)
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uart8250_data[mips_machtype][0].uartclk =
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loongson_sysconf.uarts[0].uartclk;
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for (i = 1; i < loongson_sysconf.nr_uarts; i++) {
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iotype = loongson_sysconf.uarts[i].iotype;
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uart8250_data[mips_machtype][i].iotype = iotype;
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loongson_uart_base[i] = loongson_sysconf.uarts[i].uart_base;
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if (UPIO_MEM == iotype) {
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uart8250_data[mips_machtype][i].irq =
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MIPS_CPU_IRQ_BASE + loongson_sysconf.uarts[i].int_offset;
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uart8250_data[mips_machtype][i].mapbase =
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loongson_uart_base[i];
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uart8250_data[mips_machtype][i].membase =
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ioremap_nocache(loongson_uart_base[i], 8);
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} else if (UPIO_PORT == iotype) {
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uart8250_data[mips_machtype][i].irq =
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loongson_sysconf.uarts[i].int_offset;
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uart8250_data[mips_machtype][i].iobase =
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loongson_uart_base[i] - LOONGSON_PCIIO_BASE;
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}
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uart8250_data[mips_machtype][i].uartclk =
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loongson_sysconf.uarts[i].uartclk;
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uart8250_data[mips_machtype][i].flags =
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UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
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}
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memset(&uart8250_data[mips_machtype][loongson_sysconf.nr_uarts],
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0, sizeof(struct plat_serial8250_port));
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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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module_init(serial_init);
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static void __exit serial_exit(void)
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{
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platform_device_unregister(&uart8250_device);
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}
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module_exit(serial_exit);
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