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/pata_platform.h> 21 22 #include <asm/elf.h> 23 #include <asm/io.h> 24 #include <asm/mach-types.h> 25 #include <asm/hardware.h> 26 #include <asm/page.h> 27 #include <asm/domain.h> 28 #include <asm/setup.h> 29 30 #include <asm/mach/map.h> 31 #include <asm/mach/arch.h> 32 #include <asm/mach/time.h> 33 34 extern void rpc_init_irq(void); 35 36 unsigned int vram_size; 37 unsigned int memc_ctrl_reg; 38 unsigned int number_mfm_drives; 39 40 static int __init parse_tag_acorn(const struct tag *tag) 41 { 42 memc_ctrl_reg = tag->u.acorn.memc_control_reg; 43 number_mfm_drives = tag->u.acorn.adfsdrives; 44 45 switch (tag->u.acorn.vram_pages) { 46 case 512: 47 vram_size += PAGE_SIZE * 256; 48 case 256: 49 vram_size += PAGE_SIZE * 256; 50 default: 51 break; 52 } 53 #if 0 54 if (vram_size) { 55 desc->video_start = 0x02000000; 56 desc->video_end = 0x02000000 + vram_size; 57 } 58 #endif 59 return 0; 60 } 61 62 __tagtable(ATAG_ACORN, parse_tag_acorn); 63 64 static struct map_desc rpc_io_desc[] __initdata = { 65 { /* VRAM */ 66 .virtual = SCREEN_BASE, 67 .pfn = __phys_to_pfn(SCREEN_START), 68 .length = 2*1048576, 69 .type = MT_DEVICE 70 }, { /* IO space */ 71 .virtual = (u32)IO_BASE, 72 .pfn = __phys_to_pfn(IO_START), 73 .length = IO_SIZE , 74 .type = MT_DEVICE 75 }, { /* EASI space */ 76 .virtual = EASI_BASE, 77 .pfn = __phys_to_pfn(EASI_START), 78 .length = EASI_SIZE, 79 .type = MT_DEVICE 80 } 81 }; 82 83 static void __init rpc_map_io(void) 84 { 85 iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc)); 86 87 /* 88 * Turn off floppy. 89 */ 90 writeb(0xc, PCIO_BASE + (0x3f2 << 2)); 91 92 /* 93 * RiscPC can't handle half-word loads and stores 94 */ 95 elf_hwcap &= ~HWCAP_HALF; 96 } 97 98 static struct resource acornfb_resources[] = { 99 { /* VIDC */ 100 .start = 0x03400000, 101 .end = 0x035fffff, 102 .flags = IORESOURCE_MEM, 103 }, { 104 .start = IRQ_VSYNCPULSE, 105 .end = IRQ_VSYNCPULSE, 106 .flags = IORESOURCE_IRQ, 107 }, 108 }; 109 110 static struct platform_device acornfb_device = { 111 .name = "acornfb", 112 .id = -1, 113 .dev = { 114 .coherent_dma_mask = 0xffffffff, 115 }, 116 .num_resources = ARRAY_SIZE(acornfb_resources), 117 .resource = acornfb_resources, 118 }; 119 120 static struct resource iomd_resources[] = { 121 { 122 .start = 0x03200000, 123 .end = 0x0320ffff, 124 .flags = IORESOURCE_MEM, 125 }, 126 }; 127 128 static struct platform_device iomd_device = { 129 .name = "iomd", 130 .id = -1, 131 .num_resources = ARRAY_SIZE(iomd_resources), 132 .resource = iomd_resources, 133 }; 134 135 static struct platform_device kbd_device = { 136 .name = "kart", 137 .id = -1, 138 .dev = { 139 .parent = &iomd_device.dev, 140 }, 141 }; 142 143 static struct plat_serial8250_port serial_platform_data[] = { 144 { 145 .mapbase = 0x03010fe0, 146 .irq = 10, 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 [0] = { 169 .start = 0x030107c0, 170 .end = 0x030107df, 171 .flags = IORESOURCE_MEM, 172 }, 173 [1] = { 174 .start = 0x03010fd8, 175 .end = 0x03010fdb, 176 .flags = IORESOURCE_MEM, 177 }, 178 [2] = { 179 .start = IRQ_HARDDISK, 180 .end = IRQ_HARDDISK, 181 .flags = IORESOURCE_IRQ, 182 }, 183 }; 184 185 static struct platform_device pata_device = { 186 .name = "pata_platform", 187 .id = -1, 188 .num_resources = ARRAY_SIZE(pata_resources), 189 .resource = pata_resources, 190 .dev = { 191 .platform_data = &pata_platform_data, 192 .coherent_dma_mask = ~0, /* grumble */ 193 }, 194 }; 195 196 static struct platform_device *devs[] __initdata = { 197 &iomd_device, 198 &kbd_device, 199 &serial_device, 200 &acornfb_device, 201 &pata_device, 202 }; 203 204 static int __init rpc_init(void) 205 { 206 return platform_add_devices(devs, ARRAY_SIZE(devs)); 207 } 208 209 arch_initcall(rpc_init); 210 211 extern struct sys_timer ioc_timer; 212 213 MACHINE_START(RISCPC, "Acorn-RiscPC") 214 /* Maintainer: Russell King */ 215 .phys_io = 0x03000000, 216 .io_pg_offst = ((0xe0000000) >> 18) & 0xfffc, 217 .boot_params = 0x10000100, 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 MACHINE_END 224