Merge tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm...
[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 #include <linux/ata_platform.h>
21 #include <linux/io.h>
22 #include <linux/i2c.h>
23
24 #include <asm/elf.h>
25 #include <asm/mach-types.h>
26 #include <mach/hardware.h>
27 #include <asm/hardware/iomd.h>
28 #include <asm/page.h>
29 #include <asm/domain.h>
30 #include <asm/setup.h>
31 #include <asm/system_misc.h>
32
33 #include <asm/mach/map.h>
34 #include <asm/mach/arch.h>
35 #include <asm/mach/time.h>
36
37 extern void rpc_init_irq(void);
38
39 unsigned int vram_size;
40 unsigned int memc_ctrl_reg;
41 unsigned int number_mfm_drives;
42
43 static int __init parse_tag_acorn(const struct tag *tag)
44 {
45         memc_ctrl_reg = tag->u.acorn.memc_control_reg;
46         number_mfm_drives = tag->u.acorn.adfsdrives;
47
48         switch (tag->u.acorn.vram_pages) {
49         case 512:
50                 vram_size += PAGE_SIZE * 256;
51         case 256:
52                 vram_size += PAGE_SIZE * 256;
53         default:
54                 break;
55         }
56 #if 0
57         if (vram_size) {
58                 desc->video_start = 0x02000000;
59                 desc->video_end   = 0x02000000 + vram_size;
60         }
61 #endif
62         return 0;
63 }
64
65 __tagtable(ATAG_ACORN, parse_tag_acorn);
66
67 static struct map_desc rpc_io_desc[] __initdata = {
68         {       /* VRAM         */
69                 .virtual        =  SCREEN_BASE,
70                 .pfn            = __phys_to_pfn(SCREEN_START),
71                 .length         =       2*1048576,
72                 .type           = MT_DEVICE
73         }, {    /* IO space     */
74                 .virtual        =  (u32)IO_BASE,
75                 .pfn            = __phys_to_pfn(IO_START),
76                 .length         =       IO_SIZE  ,
77                 .type           = MT_DEVICE
78         }, {    /* EASI space   */
79                 .virtual        = (unsigned long)EASI_BASE,
80                 .pfn            = __phys_to_pfn(EASI_START),
81                 .length         = EASI_SIZE,
82                 .type           = MT_DEVICE
83         }
84 };
85
86 static void __init rpc_map_io(void)
87 {
88         iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc));
89
90         /*
91          * Turn off floppy.
92          */
93         writeb(0xc, PCIO_BASE + (0x3f2 << 2));
94
95         /*
96          * RiscPC can't handle half-word loads and stores
97          */
98         elf_hwcap &= ~HWCAP_HALF;
99 }
100
101 static struct resource acornfb_resources[] = {
102         /* VIDC */
103         DEFINE_RES_MEM(0x03400000, 0x00200000),
104         DEFINE_RES_IRQ(IRQ_VSYNCPULSE),
105 };
106
107 static struct platform_device acornfb_device = {
108         .name                   = "acornfb",
109         .id                     = -1,
110         .dev                    = {
111                 .coherent_dma_mask = 0xffffffff,
112         },
113         .num_resources          = ARRAY_SIZE(acornfb_resources),
114         .resource               = acornfb_resources,
115 };
116
117 static struct resource iomd_resources[] = {
118         DEFINE_RES_MEM(0x03200000, 0x10000),
119 };
120
121 static struct platform_device iomd_device = {
122         .name                   = "iomd",
123         .id                     = -1,
124         .num_resources          = ARRAY_SIZE(iomd_resources),
125         .resource               = iomd_resources,
126 };
127
128 static struct resource iomd_kart_resources[] = {
129         DEFINE_RES_IRQ(IRQ_KEYBOARDRX),
130         DEFINE_RES_IRQ(IRQ_KEYBOARDTX),
131 };
132
133 static struct platform_device kbd_device = {
134         .name                   = "kart",
135         .id                     = -1,
136         .dev                    = {
137                 .parent         = &iomd_device.dev,
138         },
139         .num_resources          = ARRAY_SIZE(iomd_kart_resources),
140         .resource               = iomd_kart_resources,
141 };
142
143 static struct plat_serial8250_port serial_platform_data[] = {
144         {
145                 .mapbase        = 0x03010fe0,
146                 .irq            = IRQ_SERIALPORT,
147                 .uartclk        = 1843200,
148                 .regshift       = 2,
149                 .iotype         = UPIO_MEM,
150                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
151         },
152         { },
153 };
154
155 static struct platform_device serial_device = {
156         .name                   = "serial8250",
157         .id                     = PLAT8250_DEV_PLATFORM,
158         .dev                    = {
159                 .platform_data  = serial_platform_data,
160         },
161 };
162
163 static struct pata_platform_info pata_platform_data = {
164         .ioport_shift           = 2,
165 };
166
167 static struct resource pata_resources[] = {
168         DEFINE_RES_MEM(0x030107c0, 0x20),
169         DEFINE_RES_MEM(0x03010fd8, 0x04),
170         DEFINE_RES_IRQ(IRQ_HARDDISK),
171 };
172
173 static struct platform_device pata_device = {
174         .name                   = "pata_platform",
175         .id                     = -1,
176         .num_resources          = ARRAY_SIZE(pata_resources),
177         .resource               = pata_resources,
178         .dev                    = {
179                 .platform_data  = &pata_platform_data,
180                 .coherent_dma_mask = ~0,        /* grumble */
181         },
182 };
183
184 static struct platform_device *devs[] __initdata = {
185         &iomd_device,
186         &kbd_device,
187         &serial_device,
188         &acornfb_device,
189         &pata_device,
190 };
191
192 static struct i2c_board_info i2c_rtc = {
193         I2C_BOARD_INFO("pcf8583", 0x50)
194 };
195
196 static int __init rpc_init(void)
197 {
198         i2c_register_board_info(0, &i2c_rtc, 1);
199         return platform_add_devices(devs, ARRAY_SIZE(devs));
200 }
201
202 arch_initcall(rpc_init);
203
204 static void rpc_restart(char mode, const char *cmd)
205 {
206         iomd_writeb(0, IOMD_ROMCR0);
207
208         /*
209          * Jump into the ROM
210          */
211         soft_restart(0);
212 }
213
214 extern struct sys_timer ioc_timer;
215
216 MACHINE_START(RISCPC, "Acorn-RiscPC")
217         /* Maintainer: Russell King */
218         .atag_offset    = 0x100,
219         .reserve_lp0    = 1,
220         .reserve_lp1    = 1,
221         .map_io         = rpc_map_io,
222         .init_irq       = rpc_init_irq,
223         .timer          = &ioc_timer,
224         .restart        = rpc_restart,
225 MACHINE_END