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
serial_init(void)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
serial_exit(void)82 static void __exit serial_exit(void)
83 {
84 platform_device_unregister(&uart8250_device);
85 }
86 module_exit(serial_exit);
87