1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org) 7 * 8 * Copyright (C) 2009 Lemote, Inc. 9 * Author: Yan hua (yanhua@lemote.com) 10 * Author: Wu Zhangjin (wuzhangjin@gmail.com) 11 */ 12 13#include <linux/io.h> 14#include <linux/init.h> 15#include <linux/serial_8250.h> 16 17#include <asm/bootinfo.h> 18 19#include <loongson.h> 20#include <machine.h> 21 22#define PORT(int) \ 23{ \ 24 .irq = int, \ 25 .uartclk = 1843200, \ 26 .iotype = UPIO_PORT, \ 27 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \ 28 .regshift = 0, \ 29} 30 31#define PORT_M(int) \ 32{ \ 33 .irq = MIPS_CPU_IRQ_BASE + (int), \ 34 .uartclk = 3686400, \ 35 .iotype = UPIO_MEM, \ 36 .membase = (void __iomem *)NULL, \ 37 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \ 38 .regshift = 0, \ 39} 40 41static struct plat_serial8250_port uart8250_data[][2] = { 42 [MACH_LOONGSON_UNKNOWN] {}, 43 [MACH_LEMOTE_FL2E] {PORT(4), {} }, 44 [MACH_LEMOTE_FL2F] {PORT(3), {} }, 45 [MACH_LEMOTE_ML2F7] {PORT_M(3), {} }, 46 [MACH_LEMOTE_YL2F89] {PORT_M(3), {} }, 47 [MACH_DEXXON_GDIUM2F10] {PORT_M(3), {} }, 48 [MACH_LEMOTE_NAS] {PORT_M(3), {} }, 49 [MACH_LEMOTE_LL2F] {PORT(3), {} }, 50 [MACH_LOONGSON_END] {}, 51}; 52 53static struct platform_device uart8250_device = { 54 .name = "serial8250", 55 .id = PLAT8250_DEV_PLATFORM, 56}; 57 58static int __init serial_init(void) 59{ 60 unsigned char iotype; 61 62 iotype = uart8250_data[mips_machtype][0].iotype; 63 64 if (UPIO_MEM == iotype) 65 uart8250_data[mips_machtype][0].membase = 66 (void __iomem *)_loongson_uart_base; 67 else if (UPIO_PORT == iotype) 68 uart8250_data[mips_machtype][0].iobase = 69 loongson_uart_base - LOONGSON_PCIIO_BASE; 70 71 uart8250_device.dev.platform_data = uart8250_data[mips_machtype]; 72 73 return platform_device_register(&uart8250_device); 74} 75 76device_initcall(serial_init); 77