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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mach-rpc/riscpc.c | |
3 | * | |
4 | * Copyright (C) 1998-2001 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * Architecture specific fixups. | |
11 | */ | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/tty.h> | |
14 | #include <linux/delay.h> | |
15 | #include <linux/pm.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/sched.h> | |
18 | #include <linux/device.h> | |
19 | #include <linux/serial_8250.h> | |
20 | ||
21 | #include <asm/elf.h> | |
22 | #include <asm/io.h> | |
23 | #include <asm/mach-types.h> | |
24 | #include <asm/hardware.h> | |
25 | #include <asm/page.h> | |
26 | #include <asm/domain.h> | |
27 | #include <asm/setup.h> | |
28 | ||
29 | #include <asm/mach/map.h> | |
30 | #include <asm/mach/arch.h> | |
31 | #include <asm/mach/time.h> | |
32 | ||
33 | extern void rpc_init_irq(void); | |
34 | ||
35 | extern unsigned int vram_size; | |
36 | ||
37 | #if 0 | |
38 | ||
39 | unsigned int memc_ctrl_reg; | |
40 | unsigned int number_mfm_drives; | |
41 | ||
42 | static int __init parse_tag_acorn(const struct tag *tag) | |
43 | { | |
44 | memc_ctrl_reg = tag->u.acorn.memc_control_reg; | |
45 | number_mfm_drives = tag->u.acorn.adfsdrives; | |
46 | ||
47 | switch (tag->u.acorn.vram_pages) { | |
48 | case 512: | |
49 | vram_size += PAGE_SIZE * 256; | |
50 | case 256: | |
51 | vram_size += PAGE_SIZE * 256; | |
52 | default: | |
53 | break; | |
54 | } | |
55 | #if 0 | |
56 | if (vram_size) { | |
57 | desc->video_start = 0x02000000; | |
58 | desc->video_end = 0x02000000 + vram_size; | |
59 | } | |
60 | #endif | |
61 | return 0; | |
62 | } | |
63 | ||
64 | __tagtable(ATAG_ACORN, parse_tag_acorn); | |
65 | ||
66 | #endif | |
67 | ||
68 | static struct map_desc rpc_io_desc[] __initdata = { | |
69 | { SCREEN_BASE, SCREEN_START, 2*1048576, MT_DEVICE }, /* VRAM */ | |
70 | { (u32)IO_BASE, IO_START, IO_SIZE , MT_DEVICE }, /* IO space */ | |
71 | { EASI_BASE, EASI_START, EASI_SIZE, MT_DEVICE } /* EASI space */ | |
72 | }; | |
73 | ||
74 | static void __init rpc_map_io(void) | |
75 | { | |
76 | iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc)); | |
77 | ||
78 | /* | |
79 | * Turn off floppy. | |
80 | */ | |
81 | outb(0xc, 0x3f2); | |
82 | ||
83 | /* | |
84 | * RiscPC can't handle half-word loads and stores | |
85 | */ | |
86 | elf_hwcap &= ~HWCAP_HALF; | |
87 | } | |
88 | ||
89 | static struct resource acornfb_resources[] = { | |
90 | { /* VIDC */ | |
91 | .start = 0x03400000, | |
92 | .end = 0x035fffff, | |
93 | .flags = IORESOURCE_MEM, | |
94 | }, { | |
95 | .start = IRQ_VSYNCPULSE, | |
96 | .end = IRQ_VSYNCPULSE, | |
97 | .flags = IORESOURCE_IRQ, | |
98 | }, | |
99 | }; | |
100 | ||
101 | static struct platform_device acornfb_device = { | |
102 | .name = "acornfb", | |
103 | .id = -1, | |
104 | .dev = { | |
105 | .coherent_dma_mask = 0xffffffff, | |
106 | }, | |
107 | .num_resources = ARRAY_SIZE(acornfb_resources), | |
108 | .resource = acornfb_resources, | |
109 | }; | |
110 | ||
111 | static struct resource iomd_resources[] = { | |
112 | { | |
113 | .start = 0x03200000, | |
114 | .end = 0x0320ffff, | |
115 | .flags = IORESOURCE_MEM, | |
116 | }, | |
117 | }; | |
118 | ||
119 | static struct platform_device iomd_device = { | |
120 | .name = "iomd", | |
121 | .id = -1, | |
122 | .num_resources = ARRAY_SIZE(iomd_resources), | |
123 | .resource = iomd_resources, | |
124 | }; | |
125 | ||
126 | static struct platform_device kbd_device = { | |
127 | .name = "kart", | |
128 | .id = -1, | |
129 | .dev = { | |
130 | .parent = &iomd_device.dev, | |
131 | }, | |
132 | }; | |
133 | ||
134 | static struct plat_serial8250_port serial_platform_data[] = { | |
135 | { | |
136 | .mapbase = 0x03010fe0, | |
137 | .irq = 10, | |
138 | .uartclk = 1843200, | |
139 | .regshift = 2, | |
140 | .iotype = UPIO_MEM, | |
141 | .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST, | |
142 | }, | |
143 | { }, | |
144 | }; | |
145 | ||
146 | static struct platform_device serial_device = { | |
147 | .name = "serial8250", | |
148 | .id = 0, | |
149 | .dev = { | |
150 | .platform_data = serial_platform_data, | |
151 | }, | |
152 | }; | |
153 | ||
154 | static struct platform_device *devs[] __initdata = { | |
155 | &iomd_device, | |
156 | &kbd_device, | |
157 | &serial_device, | |
158 | &acornfb_device, | |
159 | }; | |
160 | ||
161 | static int __init rpc_init(void) | |
162 | { | |
163 | return platform_add_devices(devs, ARRAY_SIZE(devs)); | |
164 | } | |
165 | ||
166 | arch_initcall(rpc_init); | |
167 | ||
168 | extern struct sys_timer ioc_timer; | |
169 | ||
170 | MACHINE_START(RISCPC, "Acorn-RiscPC") | |
171 | MAINTAINER("Russell King") | |
172 | BOOT_MEM(0x10000000, 0x03000000, 0xe0000000) | |
173 | BOOT_PARAMS(0x10000100) | |
174 | DISABLE_PARPORT(0) | |
175 | DISABLE_PARPORT(1) | |
176 | MAPIO(rpc_map_io) | |
177 | INITIRQ(rpc_init_irq) | |
178 | .timer = &ioc_timer, | |
179 | MACHINE_END |