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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 LT |
63 | static struct map_desc rpc_io_desc[] __initdata = { |
64 | { SCREEN_BASE, SCREEN_START, 2*1048576, MT_DEVICE }, /* VRAM */ | |
65 | { (u32)IO_BASE, IO_START, IO_SIZE , MT_DEVICE }, /* IO space */ | |
66 | { EASI_BASE, EASI_START, EASI_SIZE, MT_DEVICE } /* EASI space */ | |
67 | }; | |
68 | ||
69 | static void __init rpc_map_io(void) | |
70 | { | |
71 | iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc)); | |
72 | ||
73 | /* | |
74 | * Turn off floppy. | |
75 | */ | |
76 | outb(0xc, 0x3f2); | |
77 | ||
78 | /* | |
79 | * RiscPC can't handle half-word loads and stores | |
80 | */ | |
81 | elf_hwcap &= ~HWCAP_HALF; | |
82 | } | |
83 | ||
84 | static struct resource acornfb_resources[] = { | |
85 | { /* VIDC */ | |
86 | .start = 0x03400000, | |
87 | .end = 0x035fffff, | |
88 | .flags = IORESOURCE_MEM, | |
89 | }, { | |
90 | .start = IRQ_VSYNCPULSE, | |
91 | .end = IRQ_VSYNCPULSE, | |
92 | .flags = IORESOURCE_IRQ, | |
93 | }, | |
94 | }; | |
95 | ||
96 | static struct platform_device acornfb_device = { | |
97 | .name = "acornfb", | |
98 | .id = -1, | |
99 | .dev = { | |
100 | .coherent_dma_mask = 0xffffffff, | |
101 | }, | |
102 | .num_resources = ARRAY_SIZE(acornfb_resources), | |
103 | .resource = acornfb_resources, | |
104 | }; | |
105 | ||
106 | static struct resource iomd_resources[] = { | |
107 | { | |
108 | .start = 0x03200000, | |
109 | .end = 0x0320ffff, | |
110 | .flags = IORESOURCE_MEM, | |
111 | }, | |
112 | }; | |
113 | ||
114 | static struct platform_device iomd_device = { | |
115 | .name = "iomd", | |
116 | .id = -1, | |
117 | .num_resources = ARRAY_SIZE(iomd_resources), | |
118 | .resource = iomd_resources, | |
119 | }; | |
120 | ||
121 | static struct platform_device kbd_device = { | |
122 | .name = "kart", | |
123 | .id = -1, | |
124 | .dev = { | |
125 | .parent = &iomd_device.dev, | |
126 | }, | |
127 | }; | |
128 | ||
129 | static struct plat_serial8250_port serial_platform_data[] = { | |
130 | { | |
131 | .mapbase = 0x03010fe0, | |
132 | .irq = 10, | |
133 | .uartclk = 1843200, | |
134 | .regshift = 2, | |
135 | .iotype = UPIO_MEM, | |
136 | .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST, | |
137 | }, | |
138 | { }, | |
139 | }; | |
140 | ||
141 | static struct platform_device serial_device = { | |
142 | .name = "serial8250", | |
143 | .id = 0, | |
144 | .dev = { | |
145 | .platform_data = serial_platform_data, | |
146 | }, | |
147 | }; | |
148 | ||
149 | static struct platform_device *devs[] __initdata = { | |
150 | &iomd_device, | |
151 | &kbd_device, | |
152 | &serial_device, | |
153 | &acornfb_device, | |
154 | }; | |
155 | ||
156 | static int __init rpc_init(void) | |
157 | { | |
158 | return platform_add_devices(devs, ARRAY_SIZE(devs)); | |
159 | } | |
160 | ||
161 | arch_initcall(rpc_init); | |
162 | ||
163 | extern struct sys_timer ioc_timer; | |
164 | ||
165 | MACHINE_START(RISCPC, "Acorn-RiscPC") | |
e9dea0c6 RK |
166 | /* Maintainer: Russell King */ |
167 | .phys_ram = 0x10000000, | |
168 | .phys_io = 0x03000000, | |
169 | .io_pg_offst = ((0xe0000000) >> 18) & 0xfffc, | |
170 | .boot_params = 0x10000100, | |
171 | .reserve_lp0 = 1, | |
172 | .reserve_lp1 = 1, | |
173 | .map_io = rpc_map_io, | |
174 | .init_irq = rpc_init_irq, | |
1da177e4 LT |
175 | .timer = &ioc_timer, |
176 | MACHINE_END |