Merge branch 'master'
[linux-2.6] / 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 unsigned int vram_size;
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
63 static struct map_desc rpc_io_desc[] __initdata = {
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         }
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",
156         .id                     = PLAT8250_DEV_PLATFORM,
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")
179         /* Maintainer: Russell King */
180         .phys_ram       = 0x10000000,
181         .phys_io        = 0x03000000,
182         .io_pg_offst    = ((0xe0000000) >> 18) & 0xfffc,
183         .boot_params    = 0x10000100,
184         .reserve_lp0    = 1,
185         .reserve_lp1    = 1,
186         .map_io         = rpc_map_io,
187         .init_irq       = rpc_init_irq,
188         .timer          = &ioc_timer,
189 MACHINE_END