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 228