Merge branch 'devel-stable' of http://ftp.arm.linux.org.uk/pub/linux/arm/kernel/git...
[linux-3.10.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/page.h>
28 #include <asm/domain.h>
29 #include <asm/setup.h>
30
31 #include <asm/mach/map.h>
32 #include <asm/mach/arch.h>
33 #include <asm/mach/time.h>
34
35 extern void rpc_init_irq(void);
36
37 unsigned int vram_size;
38 unsigned int memc_ctrl_reg;
39 unsigned int number_mfm_drives;
40
41 static int __init parse_tag_acorn(const struct tag *tag)
42 {
43         memc_ctrl_reg = tag->u.acorn.memc_control_reg;
44         number_mfm_drives = tag->u.acorn.adfsdrives;
45
46         switch (tag->u.acorn.vram_pages) {
47         case 512:
48                 vram_size += PAGE_SIZE * 256;
49         case 256:
50                 vram_size += PAGE_SIZE * 256;
51         default:
52                 break;
53         }
54 #if 0
55         if (vram_size) {
56                 desc->video_start = 0x02000000;
57                 desc->video_end   = 0x02000000 + vram_size;
58         }
59 #endif
60         return 0;
61 }
62
63 __tagtable(ATAG_ACORN, parse_tag_acorn);
64
65 static struct map_desc rpc_io_desc[] __initdata = {
66         {       /* VRAM         */
67                 .virtual        =  SCREEN_BASE,
68                 .pfn            = __phys_to_pfn(SCREEN_START),
69                 .length         =       2*1048576,
70                 .type           = MT_DEVICE
71         }, {    /* IO space     */
72                 .virtual        =  (u32)IO_BASE,
73                 .pfn            = __phys_to_pfn(IO_START),
74                 .length         =       IO_SIZE  ,
75                 .type           = MT_DEVICE
76         }, {    /* EASI space   */
77                 .virtual        = (unsigned long)EASI_BASE,
78                 .pfn            = __phys_to_pfn(EASI_START),
79                 .length         = EASI_SIZE,
80                 .type           = MT_DEVICE
81         }
82 };
83
84 static void __init rpc_map_io(void)
85 {
86         iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc));
87
88         /*
89          * Turn off floppy.
90          */
91         writeb(0xc, PCIO_BASE + (0x3f2 << 2));
92
93         /*
94          * RiscPC can't handle half-word loads and stores
95          */
96         elf_hwcap &= ~HWCAP_HALF;
97 }
98
99 static struct resource acornfb_resources[] = {
100         {       /* VIDC */
101                 .start          = 0x03400000,
102                 .end            = 0x035fffff,
103                 .flags          = IORESOURCE_MEM,
104         }, {
105                 .start          = IRQ_VSYNCPULSE,
106                 .end            = IRQ_VSYNCPULSE,
107                 .flags          = IORESOURCE_IRQ,
108         },
109 };
110
111 static struct platform_device acornfb_device = {
112         .name                   = "acornfb",
113         .id                     = -1,
114         .dev                    = {
115                 .coherent_dma_mask = 0xffffffff,
116         },
117         .num_resources          = ARRAY_SIZE(acornfb_resources),
118         .resource               = acornfb_resources,
119 };
120
121 static struct resource iomd_resources[] = {
122         {
123                 .start          = 0x03200000,
124                 .end            = 0x0320ffff,
125                 .flags          = IORESOURCE_MEM,
126         },
127 };
128
129 static struct platform_device iomd_device = {
130         .name                   = "iomd",
131         .id                     = -1,
132         .num_resources          = ARRAY_SIZE(iomd_resources),
133         .resource               = iomd_resources,
134 };
135
136 static struct platform_device kbd_device = {
137         .name                   = "kart",
138         .id                     = -1,
139         .dev                    = {
140                 .parent         = &iomd_device.dev,
141         },
142 };
143
144 static struct plat_serial8250_port serial_platform_data[] = {
145         {
146                 .mapbase        = 0x03010fe0,
147                 .irq            = 10,
148                 .uartclk        = 1843200,
149                 .regshift       = 2,
150                 .iotype         = UPIO_MEM,
151                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
152         },
153         { },
154 };
155
156 static struct platform_device serial_device = {
157         .name                   = "serial8250",
158         .id                     = PLAT8250_DEV_PLATFORM,
159         .dev                    = {
160                 .platform_data  = serial_platform_data,
161         },
162 };
163
164 static struct pata_platform_info pata_platform_data = {
165         .ioport_shift           = 2,
166 };
167
168 static struct resource pata_resources[] = {
169         [0] = {
170                 .start          = 0x030107c0,
171                 .end            = 0x030107df,
172                 .flags          = IORESOURCE_MEM,
173         },
174         [1] = {
175                 .start          = 0x03010fd8,
176                 .end            = 0x03010fdb,
177                 .flags          = IORESOURCE_MEM,
178         },
179         [2] = {
180                 .start          = IRQ_HARDDISK,
181                 .end            = IRQ_HARDDISK,
182                 .flags          = IORESOURCE_IRQ,
183         },
184 };
185
186 static struct platform_device pata_device = {
187         .name                   = "pata_platform",
188         .id                     = -1,
189         .num_resources          = ARRAY_SIZE(pata_resources),
190         .resource               = pata_resources,
191         .dev                    = {
192                 .platform_data  = &pata_platform_data,
193                 .coherent_dma_mask = ~0,        /* grumble */
194         },
195 };
196
197 static struct platform_device *devs[] __initdata = {
198         &iomd_device,
199         &kbd_device,
200         &serial_device,
201         &acornfb_device,
202         &pata_device,
203 };
204
205 static struct i2c_board_info i2c_rtc = {
206         I2C_BOARD_INFO("pcf8583", 0x50)
207 };
208
209 static int __init rpc_init(void)
210 {
211         i2c_register_board_info(0, &i2c_rtc, 1);
212         return platform_add_devices(devs, ARRAY_SIZE(devs));
213 }
214
215 arch_initcall(rpc_init);
216
217 extern struct sys_timer ioc_timer;
218
219 MACHINE_START(RISCPC, "Acorn-RiscPC")
220         /* Maintainer: Russell King */
221         .atag_offset    = 0x100,
222         .reserve_lp0    = 1,
223         .reserve_lp1    = 1,
224         .map_io         = rpc_map_io,
225         .init_irq       = rpc_init_irq,
226         .timer          = &ioc_timer,
227 MACHINE_END