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/module.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, clk) \ 23 { \ 24 .irq = int, \ 25 .uartclk = clk, \ 26 .iotype = UPIO_PORT, \ 27 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \ 28 .regshift = 0, \ 29 } 30 31 #define PORT_M(int, clk) \ 32 { \ 33 .irq = MIPS_CPU_IRQ_BASE + (int), \ 34 .uartclk = clk, \ 35 .iotype = UPIO_MEM, \ 36 .membase = (void __iomem *)NULL, \ 37 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \ 38 .regshift = 0, \ 39 } 40 41 static struct plat_serial8250_port uart8250_data[MACH_LOONGSON_END + 1] = { 42 [MACH_LOONGSON_UNKNOWN] = {}, 43 [MACH_LEMOTE_FL2E] = PORT(4, 1843200), 44 [MACH_LEMOTE_FL2F] = PORT(3, 1843200), 45 [MACH_LEMOTE_ML2F7] = PORT_M(3, 3686400), 46 [MACH_LEMOTE_YL2F89] = PORT_M(3, 3686400), 47 [MACH_DEXXON_GDIUM2F10] = PORT_M(3, 3686400), 48 [MACH_LEMOTE_NAS] = PORT_M(3, 3686400), 49 [MACH_LEMOTE_LL2F] = PORT(3, 1843200), 50 [MACH_LOONGSON_END] = {}, 51 }; 52 53 static struct platform_device uart8250_device = { 54 .name = "serial8250", 55 .id = PLAT8250_DEV_PLATFORM, 56 }; 57 58 static int __init serial_init(void) 59 { 60 unsigned char iotype; 61 62 iotype = uart8250_data[mips_machtype].iotype; 63 64 if (UPIO_MEM == iotype) { 65 uart8250_data[mips_machtype].mapbase = 66 loongson_uart_base; 67 uart8250_data[mips_machtype].membase = 68 (void __iomem *)_loongson_uart_base; 69 } 70 else if (UPIO_PORT == iotype) 71 uart8250_data[mips_machtype].iobase = 72 loongson_uart_base - LOONGSON_PCIIO_BASE; 73 74 memset(&uart8250_data[mips_machtype + 1], 0, 75 sizeof(struct plat_serial8250_port)); 76 uart8250_device.dev.platform_data = &uart8250_data[mips_machtype]; 77 78 return platform_device_register(&uart8250_device); 79 } 80 module_init(serial_init); 81 82 static void __exit serial_exit(void) 83 { 84 platform_device_unregister(&uart8250_device); 85 } 86 module_exit(serial_exit); 87