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 21 #include <asm/elf.h> 22 #include <asm/io.h> 23 #include <asm/mach-types.h> 24 #include <asm/hardware.h> 25 #include <asm/page.h> 26 #include <asm/domain.h> 27 #include <asm/setup.h> 28 29 #include <asm/mach/map.h> 30 #include <asm/mach/arch.h> 31 #include <asm/mach/time.h> 32 33 extern void rpc_init_irq(void); 34 35 unsigned int vram_size; 36 unsigned int memc_ctrl_reg; 37 unsigned int number_mfm_drives; 38 39 static int __init parse_tag_acorn(const struct tag *tag) 40 { 41 memc_ctrl_reg = tag->u.acorn.memc_control_reg; 42 number_mfm_drives = tag->u.acorn.adfsdrives; 43 44 switch (tag->u.acorn.vram_pages) { 45 case 512: 46 vram_size += PAGE_SIZE * 256; 47 case 256: 48 vram_size += PAGE_SIZE * 256; 49 default: 50 break; 51 } 52 #if 0 53 if (vram_size) { 54 desc->video_start = 0x02000000; 55 desc->video_end = 0x02000000 + vram_size; 56 } 57 #endif 58 return 0; 59 } 60 61 __tagtable(ATAG_ACORN, parse_tag_acorn); 62 63 static struct map_desc rpc_io_desc[] __initdata = { 64 { /* VRAM */ 65 .virtual = SCREEN_BASE, 66 .pfn = __phys_to_pfn(SCREEN_START), 67 .length = 2*1048576, 68 .type = MT_DEVICE 69 }, { /* IO space */ 70 .virtual = (u32)IO_BASE, 71 .pfn = __phys_to_pfn(IO_START), 72 .length = IO_SIZE , 73 .type = MT_DEVICE 74 }, { /* EASI space */ 75 .virtual = EASI_BASE, 76 .pfn = __phys_to_pfn(EASI_START), 77 .length = EASI_SIZE, 78 .type = MT_DEVICE 79 } 80 }; 81 82 static void __init rpc_map_io(void) 83 { 84 iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc)); 85 86 /* 87 * Turn off floppy. 88 */ 89 outb(0xc, 0x3f2); 90 91 /* 92 * RiscPC can't handle half-word loads and stores 93 */ 94 elf_hwcap &= ~HWCAP_HALF; 95 } 96 97 static struct resource acornfb_resources[] = { 98 { /* VIDC */ 99 .start = 0x03400000, 100 .end = 0x035fffff, 101 .flags = IORESOURCE_MEM, 102 }, { 103 .start = IRQ_VSYNCPULSE, 104 .end = IRQ_VSYNCPULSE, 105 .flags = IORESOURCE_IRQ, 106 }, 107 }; 108 109 static struct platform_device acornfb_device = { 110 .name = "acornfb", 111 .id = -1, 112 .dev = { 113 .coherent_dma_mask = 0xffffffff, 114 }, 115 .num_resources = ARRAY_SIZE(acornfb_resources), 116 .resource = acornfb_resources, 117 }; 118 119 static struct resource iomd_resources[] = { 120 { 121 .start = 0x03200000, 122 .end = 0x0320ffff, 123 .flags = IORESOURCE_MEM, 124 }, 125 }; 126 127 static struct platform_device iomd_device = { 128 .name = "iomd", 129 .id = -1, 130 .num_resources = ARRAY_SIZE(iomd_resources), 131 .resource = iomd_resources, 132 }; 133 134 static struct platform_device kbd_device = { 135 .name = "kart", 136 .id = -1, 137 .dev = { 138 .parent = &iomd_device.dev, 139 }, 140 }; 141 142 static struct plat_serial8250_port serial_platform_data[] = { 143 { 144 .mapbase = 0x03010fe0, 145 .irq = 10, 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 platform_device *devs[] __initdata = { 163 &iomd_device, 164 &kbd_device, 165 &serial_device, 166 &acornfb_device, 167 }; 168 169 static int __init rpc_init(void) 170 { 171 return platform_add_devices(devs, ARRAY_SIZE(devs)); 172 } 173 174 arch_initcall(rpc_init); 175 176 extern struct sys_timer ioc_timer; 177 178 MACHINE_START(RISCPC, "Acorn-RiscPC") 179 /* Maintainer: Russell King */ 180 .phys_ram = 0x10000000, 181 .phys_io = 0x03000000, 182 .io_pg_offst = ((0xe0000000) >> 18) & 0xfffc, 183 .boot_params = 0x10000100, 184 .reserve_lp0 = 1, 185 .reserve_lp1 = 1, 186 .map_io = rpc_map_io, 187 .init_irq = rpc_init_irq, 188 .timer = &ioc_timer, 189 MACHINE_END 190