Linux-2.6.12-rc2
[linux-2.6.git] / arch / arm / mach-rpc / riscpc.c
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