ARM: 7343/1: sa11x0: convert to sparse IRQ
[~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                 .start          = 0x03400000,
103                 .end            = 0x035fffff,
104                 .flags          = IORESOURCE_MEM,
105         }, {
106                 .start          = IRQ_VSYNCPULSE,
107                 .end            = IRQ_VSYNCPULSE,
108                 .flags          = IORESOURCE_IRQ,
109         },
110 };
111
112 static struct platform_device acornfb_device = {
113         .name                   = "acornfb",
114         .id                     = -1,
115         .dev                    = {
116                 .coherent_dma_mask = 0xffffffff,
117         },
118         .num_resources          = ARRAY_SIZE(acornfb_resources),
119         .resource               = acornfb_resources,
120 };
121
122 static struct resource iomd_resources[] = {
123         {
124                 .start          = 0x03200000,
125                 .end            = 0x0320ffff,
126                 .flags          = IORESOURCE_MEM,
127         },
128 };
129
130 static struct platform_device iomd_device = {
131         .name                   = "iomd",
132         .id                     = -1,
133         .num_resources          = ARRAY_SIZE(iomd_resources),
134         .resource               = iomd_resources,
135 };
136
137 static struct platform_device kbd_device = {
138         .name                   = "kart",
139         .id                     = -1,
140         .dev                    = {
141                 .parent         = &iomd_device.dev,
142         },
143 };
144
145 static struct plat_serial8250_port serial_platform_data[] = {
146         {
147                 .mapbase        = 0x03010fe0,
148                 .irq            = 10,
149                 .uartclk        = 1843200,
150                 .regshift       = 2,
151                 .iotype         = UPIO_MEM,
152                 .flags          = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
153         },
154         { },
155 };
156
157 static struct platform_device serial_device = {
158         .name                   = "serial8250",
159         .id                     = PLAT8250_DEV_PLATFORM,
160         .dev                    = {
161                 .platform_data  = serial_platform_data,
162         },
163 };
164
165 static struct pata_platform_info pata_platform_data = {
166         .ioport_shift           = 2,
167 };
168
169 static struct resource pata_resources[] = {
170         [0] = {
171                 .start          = 0x030107c0,
172                 .end            = 0x030107df,
173                 .flags          = IORESOURCE_MEM,
174         },
175         [1] = {
176                 .start          = 0x03010fd8,
177                 .end            = 0x03010fdb,
178                 .flags          = IORESOURCE_MEM,
179         },
180         [2] = {
181                 .start          = IRQ_HARDDISK,
182                 .end            = IRQ_HARDDISK,
183                 .flags          = IORESOURCE_IRQ,
184         },
185 };
186
187 static struct platform_device pata_device = {
188         .name                   = "pata_platform",
189         .id                     = -1,
190         .num_resources          = ARRAY_SIZE(pata_resources),
191         .resource               = pata_resources,
192         .dev                    = {
193                 .platform_data  = &pata_platform_data,
194                 .coherent_dma_mask = ~0,        /* grumble */
195         },
196 };
197
198 static struct platform_device *devs[] __initdata = {
199         &iomd_device,
200         &kbd_device,
201         &serial_device,
202         &acornfb_device,
203         &pata_device,
204 };
205
206 static struct i2c_board_info i2c_rtc = {
207         I2C_BOARD_INFO("pcf8583", 0x50)
208 };
209
210 static int __init rpc_init(void)
211 {
212         i2c_register_board_info(0, &i2c_rtc, 1);
213         return platform_add_devices(devs, ARRAY_SIZE(devs));
214 }
215
216 arch_initcall(rpc_init);
217
218 static void rpc_restart(char mode, const char *cmd)
219 {
220         iomd_writeb(0, IOMD_ROMCR0);
221
222         /*
223          * Jump into the ROM
224          */
225         soft_restart(0);
226 }
227
228 extern struct sys_timer ioc_timer;
229
230 MACHINE_START(RISCPC, "Acorn-RiscPC")
231         /* Maintainer: Russell King */
232         .atag_offset    = 0x100,
233         .reserve_lp0    = 1,
234         .reserve_lp1    = 1,
235         .map_io         = rpc_map_io,
236         .init_irq       = rpc_init_irq,
237         .timer          = &ioc_timer,
238         .restart        = rpc_restart,
239 MACHINE_END