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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 | ||
ebe2a9ff | 35 | unsigned int vram_size; |
1da177e4 LT |
36 | unsigned int memc_ctrl_reg; |
37 | unsigned int number_mfm_drives; | |
38 | ||
39 | static int __init parse_tag_acorn(const struct tag *tag) | |
40 | { | |
41 | memc_ctrl_reg = tag->u.acorn.memc_control_reg; | |
42 | number_mfm_drives = tag->u.acorn.adfsdrives; | |
43 | ||
44 | switch (tag->u.acorn.vram_pages) { | |
45 | case 512: | |
46 | vram_size += PAGE_SIZE * 256; | |
47 | case 256: | |
48 | vram_size += PAGE_SIZE * 256; | |
49 | default: | |
50 | break; | |
51 | } | |
52 | #if 0 | |
53 | if (vram_size) { | |
54 | desc->video_start = 0x02000000; | |
55 | desc->video_end = 0x02000000 + vram_size; | |
56 | } | |
57 | #endif | |
58 | return 0; | |
59 | } | |
60 | ||
61 | __tagtable(ATAG_ACORN, parse_tag_acorn); | |
62 | ||
1da177e4 | 63 | static struct map_desc rpc_io_desc[] __initdata = { |
f9258f22 DS |
64 | { /* VRAM */ |
65 | .virtual = SCREEN_BASE, | |
66 | .pfn = __phys_to_pfn(SCREEN_START), | |
67 | .length = 2*1048576, | |
68 | .type = MT_DEVICE | |
69 | }, { /* IO space */ | |
70 | .virtual = (u32)IO_BASE, | |
71 | .pfn = __phys_to_pfn(IO_START), | |
72 | .length = IO_SIZE , | |
73 | .type = MT_DEVICE | |
74 | }, { /* EASI space */ | |
75 | .virtual = EASI_BASE, | |
76 | .pfn = __phys_to_pfn(EASI_START), | |
77 | .length = EASI_SIZE, | |
78 | .type = MT_DEVICE | |
79 | } | |
1da177e4 LT |
80 | }; |
81 | ||
82 | static void __init rpc_map_io(void) | |
83 | { | |
84 | iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc)); | |
85 | ||
86 | /* | |
87 | * Turn off floppy. | |
88 | */ | |
89 | outb(0xc, 0x3f2); | |
90 | ||
91 | /* | |
92 | * RiscPC can't handle half-word loads and stores | |
93 | */ | |
94 | elf_hwcap &= ~HWCAP_HALF; | |
95 | } | |
96 | ||
97 | static struct resource acornfb_resources[] = { | |
98 | { /* VIDC */ | |
99 | .start = 0x03400000, | |
100 | .end = 0x035fffff, | |
101 | .flags = IORESOURCE_MEM, | |
102 | }, { | |
103 | .start = IRQ_VSYNCPULSE, | |
104 | .end = IRQ_VSYNCPULSE, | |
105 | .flags = IORESOURCE_IRQ, | |
106 | }, | |
107 | }; | |
108 | ||
109 | static struct platform_device acornfb_device = { | |
110 | .name = "acornfb", | |
111 | .id = -1, | |
112 | .dev = { | |
113 | .coherent_dma_mask = 0xffffffff, | |
114 | }, | |
115 | .num_resources = ARRAY_SIZE(acornfb_resources), | |
116 | .resource = acornfb_resources, | |
117 | }; | |
118 | ||
119 | static struct resource iomd_resources[] = { | |
120 | { | |
121 | .start = 0x03200000, | |
122 | .end = 0x0320ffff, | |
123 | .flags = IORESOURCE_MEM, | |
124 | }, | |
125 | }; | |
126 | ||
127 | static struct platform_device iomd_device = { | |
128 | .name = "iomd", | |
129 | .id = -1, | |
130 | .num_resources = ARRAY_SIZE(iomd_resources), | |
131 | .resource = iomd_resources, | |
132 | }; | |
133 | ||
134 | static struct platform_device kbd_device = { | |
135 | .name = "kart", | |
136 | .id = -1, | |
137 | .dev = { | |
138 | .parent = &iomd_device.dev, | |
139 | }, | |
140 | }; | |
141 | ||
142 | static struct plat_serial8250_port serial_platform_data[] = { | |
143 | { | |
144 | .mapbase = 0x03010fe0, | |
145 | .irq = 10, | |
146 | .uartclk = 1843200, | |
147 | .regshift = 2, | |
148 | .iotype = UPIO_MEM, | |
149 | .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST, | |
150 | }, | |
151 | { }, | |
152 | }; | |
153 | ||
154 | static struct platform_device serial_device = { | |
155 | .name = "serial8250", | |
6df29deb | 156 | .id = PLAT8250_DEV_PLATFORM, |
1da177e4 LT |
157 | .dev = { |
158 | .platform_data = serial_platform_data, | |
159 | }, | |
160 | }; | |
161 | ||
162 | static struct platform_device *devs[] __initdata = { | |
163 | &iomd_device, | |
164 | &kbd_device, | |
165 | &serial_device, | |
166 | &acornfb_device, | |
167 | }; | |
168 | ||
169 | static int __init rpc_init(void) | |
170 | { | |
171 | return platform_add_devices(devs, ARRAY_SIZE(devs)); | |
172 | } | |
173 | ||
174 | arch_initcall(rpc_init); | |
175 | ||
176 | extern struct sys_timer ioc_timer; | |
177 | ||
178 | MACHINE_START(RISCPC, "Acorn-RiscPC") | |
e9dea0c6 | 179 | /* Maintainer: Russell King */ |
e9dea0c6 RK |
180 | .phys_io = 0x03000000, |
181 | .io_pg_offst = ((0xe0000000) >> 18) & 0xfffc, | |
182 | .boot_params = 0x10000100, | |
183 | .reserve_lp0 = 1, | |
184 | .reserve_lp1 = 1, | |
185 | .map_io = rpc_map_io, | |
186 | .init_irq = rpc_init_irq, | |
1da177e4 LT |
187 | .timer = &ioc_timer, |
188 | MACHINE_END |