1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
* linux/arch/arm/mach-rpc/riscpc.c
*
* Copyright (C) 1998-2001 Russell King
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Architecture specific fixups.
*/
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/device.h>
#include <linux/serial_8250.h>
#include <linux/ata_platform.h>
#include <linux/io.h>
#include <linux/i2c.h>
#include <asm/elf.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <asm/hardware/iomd.h>
#include <asm/page.h>
#include <asm/domain.h>
#include <asm/setup.h>
#include <asm/system_misc.h>
#include <asm/mach/map.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
extern void rpc_init_irq(void);
unsigned int vram_size;
unsigned int memc_ctrl_reg;
unsigned int number_mfm_drives;
static int __init parse_tag_acorn(const struct tag *tag)
{
memc_ctrl_reg = tag->u.acorn.memc_control_reg;
number_mfm_drives = tag->u.acorn.adfsdrives;
switch (tag->u.acorn.vram_pages) {
case 512:
vram_size += PAGE_SIZE * 256;
case 256:
vram_size += PAGE_SIZE * 256;
default:
break;
}
#if 0
if (vram_size) {
desc->video_start = 0x02000000;
desc->video_end = 0x02000000 + vram_size;
}
#endif
return 0;
}
__tagtable(ATAG_ACORN, parse_tag_acorn);
static struct map_desc rpc_io_desc[] __initdata = {
{ /* VRAM */
.virtual = SCREEN_BASE,
.pfn = __phys_to_pfn(SCREEN_START),
.length = 2*1048576,
.type = MT_DEVICE
}, { /* IO space */
.virtual = (u32)IO_BASE,
.pfn = __phys_to_pfn(IO_START),
.length = IO_SIZE ,
.type = MT_DEVICE
}, { /* EASI space */
.virtual = (unsigned long)EASI_BASE,
.pfn = __phys_to_pfn(EASI_START),
.length = EASI_SIZE,
.type = MT_DEVICE
}
};
static void __init rpc_map_io(void)
{
iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc));
/*
* Turn off floppy.
*/
writeb(0xc, PCIO_BASE + (0x3f2 << 2));
/*
* RiscPC can't handle half-word loads and stores
*/
elf_hwcap &= ~HWCAP_HALF;
}
static struct resource acornfb_resources[] = {
/* VIDC */
DEFINE_RES_MEM(0x03400000, 0x00200000),
DEFINE_RES_IRQ(IRQ_VSYNCPULSE),
};
static struct platform_device acornfb_device = {
.name = "acornfb",
.id = -1,
.dev = {
.coherent_dma_mask = 0xffffffff,
},
.num_resources = ARRAY_SIZE(acornfb_resources),
.resource = acornfb_resources,
};
static struct resource iomd_resources[] = {
DEFINE_RES_MEM(0x03200000, 0x10000),
};
static struct platform_device iomd_device = {
.name = "iomd",
.id = -1,
.num_resources = ARRAY_SIZE(iomd_resources),
.resource = iomd_resources,
};
static struct resource iomd_kart_resources[] = {
DEFINE_RES_IRQ(IRQ_KEYBOARDRX),
DEFINE_RES_IRQ(IRQ_KEYBOARDTX),
};
static struct platform_device kbd_device = {
.name = "kart",
.id = -1,
.dev = {
.parent = &iomd_device.dev,
},
.num_resources = ARRAY_SIZE(iomd_kart_resources),
.resource = iomd_kart_resources,
};
static struct plat_serial8250_port serial_platform_data[] = {
{
.mapbase = 0x03010fe0,
.irq = IRQ_SERIALPORT,
.uartclk = 1843200,
.regshift = 2,
.iotype = UPIO_MEM,
.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
},
{ },
};
static struct platform_device serial_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = serial_platform_data,
},
};
static struct pata_platform_info pata_platform_data = {
.ioport_shift = 2,
};
static struct resource pata_resources[] = {
DEFINE_RES_MEM(0x030107c0, 0x20),
DEFINE_RES_MEM(0x03010fd8, 0x04),
DEFINE_RES_IRQ(IRQ_HARDDISK),
};
static struct platform_device pata_device = {
.name = "pata_platform",
.id = -1,
.num_resources = ARRAY_SIZE(pata_resources),
.resource = pata_resources,
.dev = {
.platform_data = &pata_platform_data,
.coherent_dma_mask = ~0, /* grumble */
},
};
static struct platform_device *devs[] __initdata = {
&iomd_device,
&kbd_device,
&serial_device,
&acornfb_device,
&pata_device,
};
static struct i2c_board_info i2c_rtc = {
I2C_BOARD_INFO("pcf8583", 0x50)
};
static int __init rpc_init(void)
{
i2c_register_board_info(0, &i2c_rtc, 1);
return platform_add_devices(devs, ARRAY_SIZE(devs));
}
arch_initcall(rpc_init);
static void rpc_restart(char mode, const char *cmd)
{
iomd_writeb(0, IOMD_ROMCR0);
/*
* Jump into the ROM
*/
soft_restart(0);
}
void ioc_timer_init(void);
MACHINE_START(RISCPC, "Acorn-RiscPC")
/* Maintainer: Russell King */
.atag_offset = 0x100,
.reserve_lp0 = 1,
.reserve_lp1 = 1,
.map_io = rpc_map_io,
.init_irq = rpc_init_irq,
.init_time = ioc_timer_init,
.restart = rpc_restart,
MACHINE_END
|
