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7ec80ddf | 1 | /* |
2 | * linux/arch/arm/mach-w90x900/w90p910.c | |
3 | * | |
4 | * Based on linux/arch/arm/plat-s3c24xx/s3c244x.c by Ben Dooks | |
5 | * | |
6 | * Copyright (c) 2008 Nuvoton technology corporation | |
7 | * All rights reserved. | |
8 | * | |
9 | * Wan ZongShun <mcuos.com@gmail.com> | |
10 | * | |
11 | * W90P910 cpu support | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | */ | |
19 | ||
20 | #include <linux/kernel.h> | |
21 | #include <linux/types.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/list.h> | |
24 | #include <linux/timer.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/platform_device.h> | |
27 | #include <linux/io.h> | |
28 | ||
29 | #include <asm/mach/arch.h> | |
30 | #include <asm/mach/map.h> | |
31 | #include <asm/mach/irq.h> | |
32 | #include <asm/irq.h> | |
33 | ||
34 | #include <mach/hardware.h> | |
35 | #include <mach/regs-serial.h> | |
36 | ||
37 | #include "cpu.h" | |
38 | ||
39 | /*W90P910 has five uarts*/ | |
40 | ||
41 | #define MAX_UART_COUNT 5 | |
42 | static int uart_count; | |
43 | static struct platform_device *uart_devs[MAX_UART_COUNT-1]; | |
44 | ||
45 | /* Initial IO mappings */ | |
46 | ||
47 | static struct map_desc w90p910_iodesc[] __initdata = { | |
48 | IODESC_ENT(IRQ), | |
49 | IODESC_ENT(GCR), | |
50 | IODESC_ENT(UART), | |
51 | IODESC_ENT(TIMER), | |
52 | IODESC_ENT(EBI), | |
53 | /*IODESC_ENT(LCD),*/ | |
54 | }; | |
55 | ||
56 | /*Init the dev resource*/ | |
57 | ||
58 | static W90X900_RES(UART0); | |
59 | static W90X900_RES(UART1); | |
60 | static W90X900_RES(UART2); | |
61 | static W90X900_RES(UART3); | |
62 | static W90X900_RES(UART4); | |
63 | static W90X900_DEVICE(uart0, UART0, 0, "w90x900-uart"); | |
64 | static W90X900_DEVICE(uart1, UART1, 1, "w90x900-uart"); | |
65 | static W90X900_DEVICE(uart2, UART2, 2, "w90x900-uart"); | |
66 | static W90X900_DEVICE(uart3, UART3, 3, "w90x900-uart"); | |
67 | static W90X900_DEVICE(uart4, UART4, 4, "w90x900-uart"); | |
68 | ||
69 | static struct platform_device *uart_devices[] __initdata = { | |
70 | &w90x900_uart0, | |
71 | &w90x900_uart1, | |
72 | &w90x900_uart2, | |
73 | &w90x900_uart3, | |
74 | &w90x900_uart4 | |
75 | }; | |
76 | ||
77 | /*Init W90P910 uart device*/ | |
78 | ||
79 | void __init w90p910_init_uarts(struct w90x900_uartcfg *cfg, int no) | |
80 | { | |
81 | struct platform_device *platdev; | |
82 | int uart, uartdev; | |
83 | ||
84 | /*By min() to judge count of uart be used indeed*/ | |
85 | ||
86 | uartdev = ARRAY_SIZE(uart_devices); | |
87 | no = min(uartdev, no); | |
88 | ||
89 | for (uart = 0; uart < no; uart++, cfg++) { | |
90 | if (cfg->hwport != uart) | |
91 | printk(KERN_ERR "w90x900_uartcfg[%d] error\n", uart); | |
92 | platdev = uart_devices[cfg->hwport]; | |
93 | uart_devs[uart] = platdev; | |
94 | platdev->dev.platform_data = cfg; | |
95 | } | |
96 | uart_count = uart; | |
97 | } | |
98 | ||
99 | /*Init W90P910 evb io*/ | |
100 | ||
101 | void __init w90p910_map_io(struct map_desc *mach_desc, int mach_size) | |
102 | { | |
103 | unsigned long idcode = 0x0; | |
104 | ||
105 | iotable_init(w90p910_iodesc, ARRAY_SIZE(w90p910_iodesc)); | |
106 | ||
107 | idcode = __raw_readl(W90X900PDID); | |
108 | if (idcode != W90P910_CPUID) | |
109 | printk(KERN_ERR "CPU type 0x%08lx is not W90P910\n", idcode); | |
110 | } | |
111 | ||
112 | /*Init W90P910 clock*/ | |
113 | ||
114 | void __init w90p910_init_clocks(int xtal) | |
115 | { | |
116 | } | |
117 | ||
118 | static int __init w90p910_init_cpu(void) | |
119 | { | |
120 | return 0; | |
121 | } | |
122 | ||
123 | static int __init w90x900_arch_init(void) | |
124 | { | |
125 | int ret; | |
126 | ||
127 | ret = w90p910_init_cpu(); | |
128 | if (ret != 0) | |
129 | return ret; | |
130 | ||
131 | return platform_add_devices(uart_devs, uart_count); | |
132 | ||
133 | } | |
134 | arch_initcall(w90x900_arch_init); |