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[][MAX_UARTS + 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_GENERIC] = {PORT_M(2, 25000000), {} },
51 [MACH_LOONGSON_END] = {},
52 };
53
54 static struct platform_device uart8250_device = {
55 .name = "serial8250",
56 .id = PLAT8250_DEV_PLATFORM,
57 };
58
serial_init(void)59 static int __init serial_init(void)
60 {
61 int i;
62 unsigned char iotype;
63
64 iotype = uart8250_data[mips_machtype][0].iotype;
65
66 if (UPIO_MEM == iotype) {
67 uart8250_data[mips_machtype][0].mapbase =
68 loongson_uart_base[0];
69 uart8250_data[mips_machtype][0].membase =
70 (void __iomem *)_loongson_uart_base[0];
71 }
72 else if (UPIO_PORT == iotype)
73 uart8250_data[mips_machtype][0].iobase =
74 loongson_uart_base[0] - LOONGSON_PCIIO_BASE;
75
76 if (loongson_sysconf.uarts[0].uartclk)
77 uart8250_data[mips_machtype][0].uartclk =
78 loongson_sysconf.uarts[0].uartclk;
79
80 for (i = 1; i < loongson_sysconf.nr_uarts; i++) {
81 iotype = loongson_sysconf.uarts[i].iotype;
82 uart8250_data[mips_machtype][i].iotype = iotype;
83 loongson_uart_base[i] = loongson_sysconf.uarts[i].uart_base;
84
85 if (UPIO_MEM == iotype) {
86 uart8250_data[mips_machtype][i].irq =
87 MIPS_CPU_IRQ_BASE + loongson_sysconf.uarts[i].int_offset;
88 uart8250_data[mips_machtype][i].mapbase =
89 loongson_uart_base[i];
90 uart8250_data[mips_machtype][i].membase =
91 ioremap_nocache(loongson_uart_base[i], 8);
92 } else if (UPIO_PORT == iotype) {
93 uart8250_data[mips_machtype][i].irq =
94 loongson_sysconf.uarts[i].int_offset;
95 uart8250_data[mips_machtype][i].iobase =
96 loongson_uart_base[i] - LOONGSON_PCIIO_BASE;
97 }
98
99 uart8250_data[mips_machtype][i].uartclk =
100 loongson_sysconf.uarts[i].uartclk;
101 uart8250_data[mips_machtype][i].flags =
102 UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
103 }
104
105 memset(&uart8250_data[mips_machtype][loongson_sysconf.nr_uarts],
106 0, sizeof(struct plat_serial8250_port));
107 uart8250_device.dev.platform_data = uart8250_data[mips_machtype];
108
109 return platform_device_register(&uart8250_device);
110 }
111 module_init(serial_init);
112
serial_exit(void)113 static void __init serial_exit(void)
114 {
115 platform_device_unregister(&uart8250_device);
116 }
117 module_exit(serial_exit);
118
