Merge branches 'acorn', 'ebsa110' and 'sa11x0' into platforms
[~shefty/rdma-dev.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
32 #include <asm/mach/map.h>
33 #include <asm/mach/arch.h>
34 #include <asm/mach/time.h>
35
36 extern void rpc_init_irq(void);
37
38 unsigned int vram_size;
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 static struct map_desc rpc_io_desc[] __initdata = {
67         {       /* VRAM         */
68                 .virtual        =  SCREEN_BASE,
69                 .pfn            = __phys_to_pfn(SCREEN_START),
70                 .length         =       2*1048576,
71                 .type           = MT_DEVICE
72         }, {    /* IO space     */
73                 .virtual        =  (u32)IO_BASE,
74                 .pfn            = __phys_to_pfn(IO_START),
75                 .length         =       IO_SIZE  ,
76                 .type           = MT_DEVICE
77         }, {    /* EASI space   */
78                 .virtual        = (unsigned long)EASI_BASE,
79                 .pfn            = __phys_to_pfn(EASI_START),
80                 .length         = EASI_SIZE,
81                 .type           = MT_DEVICE
82         }
83 };
84
85 static void __init rpc_map_io(void)
86 {
87         iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc));
88
89         /*
90          * Turn off floppy.
91          */
92         writeb(0xc, PCIO_BASE + (0x3f2 << 2));
93
94         /*
95          * RiscPC can't handle half-word loads and stores
96          */
97         elf_hwcap &= ~HWCAP_HALF;
98 }
99
100 static struct resource acornfb_resources[] = {
101         /* VIDC */
102         DEFINE_RES_MEM(0x03400000, 0x00200000),
103         DEFINE_RES_IRQ(IRQ_VSYNCPULSE),
104 };
105
106 static struct platform_device acornfb_device = {
107         .name                   = "acornfb",
108         .id                     = -1,
109         .dev                    = {
110                 .coherent_dma_mask = 0xffffffff,
111         },
112         .num_resources          = ARRAY_SIZE(acornfb_resources),
113         .resource               = acornfb_resources,
114 };
115
116 static struct resource iomd_resources[] = {
117         DEFINE_RES_MEM(0x03200000, 0x10000),
118 };
119
120 static struct platform_device iomd_device = {
121         .name                   = "iomd",
122         .id                     = -1,
123         .num_resources          = ARRAY_SIZE(iomd_resources),
124         .resource               = iomd_resources,
125 };
126
127 static struct resource iomd_kart_resources[] = {
128         DEFINE_RES_IRQ(IRQ_KEYBOARDRX),
129         DEFINE_RES_IRQ(IRQ_KEYBOARDTX),
130 };
131
132 static struct platform_device kbd_device = {
133         .name                   = "kart",
134         .id                     = -1,
135         .dev                    = {
136                 .parent         = &iomd_device.dev,
137         },
138         .num_resources          = ARRAY_SIZE(iomd_kart_resources),
139         .resource               = iomd_kart_resources,
140 };
141
142 static struct plat_serial8250_port serial_platform_data[] = {
143         {
144                 .mapbase        = 0x03010fe0,
145                 .irq            = IRQ_SERIALPORT,
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 pata_platform_info pata_platform_data = {
163         .ioport_shift           = 2,
164 };
165
166 static struct resource pata_resources[] = {
167         DEFINE_RES_MEM(0x030107c0, 0x20),
168         DEFINE_RES_MEM(0x03010fd8, 0x04),
169         DEFINE_RES_IRQ(IRQ_HARDDISK),
170 };
171
172 static struct platform_device pata_device = {
173         .name                   = "pata_platform",
174         .id                     = -1,
175         .num_resources          = ARRAY_SIZE(pata_resources),
176         .resource               = pata_resources,
177         .dev                    = {
178                 .platform_data  = &pata_platform_data,
179                 .coherent_dma_mask = ~0,        /* grumble */
180         },
181 };
182
183 static struct platform_device *devs[] __initdata = {
184         &iomd_device,
185         &kbd_device,
186         &serial_device,
187         &acornfb_device,
188         &pata_device,
189 };
190
191 static struct i2c_board_info i2c_rtc = {
192         I2C_BOARD_INFO("pcf8583", 0x50)
193 };
194
195 static int __init rpc_init(void)
196 {
197         i2c_register_board_info(0, &i2c_rtc, 1);
198         return platform_add_devices(devs, ARRAY_SIZE(devs));
199 }
200
201 arch_initcall(rpc_init);
202
203 static void rpc_restart(char mode, const char *cmd)
204 {
205         iomd_writeb(0, IOMD_ROMCR0);
206
207         /*
208          * Jump into the ROM
209          */
210         soft_restart(0);
211 }
212
213 extern struct sys_timer ioc_timer;
214
215 MACHINE_START(RISCPC, "Acorn-RiscPC")
216         /* Maintainer: Russell King */
217         .atag_offset    = 0x100,
218         .reserve_lp0    = 1,
219         .reserve_lp1    = 1,
220         .map_io         = rpc_map_io,
221         .init_irq       = rpc_init_irq,
222         .timer          = &ioc_timer,
223         .restart        = rpc_restart,
224 MACHINE_END