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 #include <linux/reboot.h> 24 25 #include <asm/elf.h> 26 #include <asm/mach-types.h> 27 #include <mach/hardware.h> 28 #include <asm/hardware/iomd.h> 29 #include <asm/page.h> 30 #include <asm/domain.h> 31 #include <asm/setup.h> 32 #include <asm/system_misc.h> 33 34 #include <asm/mach/map.h> 35 #include <asm/mach/arch.h> 36 #include <asm/mach/time.h> 37 38 extern void rpc_init_irq(void); 39 40 unsigned int vram_size; 41 unsigned int memc_ctrl_reg; 42 unsigned int number_mfm_drives; 43 44 static int __init parse_tag_acorn(const struct tag *tag) 45 { 46 memc_ctrl_reg = tag->u.acorn.memc_control_reg; 47 number_mfm_drives = tag->u.acorn.adfsdrives; 48 49 switch (tag->u.acorn.vram_pages) { 50 case 512: 51 vram_size += PAGE_SIZE * 256; 52 case 256: 53 vram_size += PAGE_SIZE * 256; 54 default: 55 break; 56 } 57 #if 0 58 if (vram_size) { 59 desc->video_start = 0x02000000; 60 desc->video_end = 0x02000000 + vram_size; 61 } 62 #endif 63 return 0; 64 } 65 66 __tagtable(ATAG_ACORN, parse_tag_acorn); 67 68 static struct map_desc rpc_io_desc[] __initdata = { 69 { /* VRAM */ 70 .virtual = SCREEN_BASE, 71 .pfn = __phys_to_pfn(SCREEN_START), 72 .length = 2*1048576, 73 .type = MT_DEVICE 74 }, { /* IO space */ 75 .virtual = (u32)IO_BASE, 76 .pfn = __phys_to_pfn(IO_START), 77 .length = IO_SIZE , 78 .type = MT_DEVICE 79 }, { /* EASI space */ 80 .virtual = (unsigned long)EASI_BASE, 81 .pfn = __phys_to_pfn(EASI_START), 82 .length = EASI_SIZE, 83 .type = MT_DEVICE 84 } 85 }; 86 87 static void __init rpc_map_io(void) 88 { 89 iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc)); 90 91 /* 92 * Turn off floppy. 93 */ 94 writeb(0xc, PCIO_BASE + (0x3f2 << 2)); 95 96 /* 97 * RiscPC can't handle half-word loads and stores 98 */ 99 elf_hwcap &= ~HWCAP_HALF; 100 } 101 102 static struct resource acornfb_resources[] = { 103 /* VIDC */ 104 DEFINE_RES_MEM(0x03400000, 0x00200000), 105 DEFINE_RES_IRQ(IRQ_VSYNCPULSE), 106 }; 107 108 static struct platform_device acornfb_device = { 109 .name = "acornfb", 110 .id = -1, 111 .dev = { 112 .coherent_dma_mask = 0xffffffff, 113 }, 114 .num_resources = ARRAY_SIZE(acornfb_resources), 115 .resource = acornfb_resources, 116 }; 117 118 static struct resource iomd_resources[] = { 119 DEFINE_RES_MEM(0x03200000, 0x10000), 120 }; 121 122 static struct platform_device iomd_device = { 123 .name = "iomd", 124 .id = -1, 125 .num_resources = ARRAY_SIZE(iomd_resources), 126 .resource = iomd_resources, 127 }; 128 129 static struct resource iomd_kart_resources[] = { 130 DEFINE_RES_IRQ(IRQ_KEYBOARDRX), 131 DEFINE_RES_IRQ(IRQ_KEYBOARDTX), 132 }; 133 134 static struct platform_device kbd_device = { 135 .name = "kart", 136 .id = -1, 137 .dev = { 138 .parent = &iomd_device.dev, 139 }, 140 .num_resources = ARRAY_SIZE(iomd_kart_resources), 141 .resource = iomd_kart_resources, 142 }; 143 144 static struct plat_serial8250_port serial_platform_data[] = { 145 { 146 .mapbase = 0x03010fe0, 147 .irq = IRQ_SERIALPORT, 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 DEFINE_RES_MEM(0x030107c0, 0x20), 170 DEFINE_RES_MEM(0x03010fd8, 0x04), 171 DEFINE_RES_IRQ(IRQ_HARDDISK), 172 }; 173 174 static struct platform_device pata_device = { 175 .name = "pata_platform", 176 .id = -1, 177 .num_resources = ARRAY_SIZE(pata_resources), 178 .resource = pata_resources, 179 .dev = { 180 .platform_data = &pata_platform_data, 181 .coherent_dma_mask = ~0, /* grumble */ 182 }, 183 }; 184 185 static struct platform_device *devs[] __initdata = { 186 &iomd_device, 187 &kbd_device, 188 &serial_device, 189 &acornfb_device, 190 &pata_device, 191 }; 192 193 static struct i2c_board_info i2c_rtc = { 194 I2C_BOARD_INFO("pcf8583", 0x50) 195 }; 196 197 static int __init rpc_init(void) 198 { 199 i2c_register_board_info(0, &i2c_rtc, 1); 200 return platform_add_devices(devs, ARRAY_SIZE(devs)); 201 } 202 203 arch_initcall(rpc_init); 204 205 static void rpc_restart(enum reboot_mode mode, const char *cmd) 206 { 207 iomd_writeb(0, IOMD_ROMCR0); 208 209 /* 210 * Jump into the ROM 211 */ 212 soft_restart(0); 213 } 214 215 void ioc_timer_init(void); 216 217 MACHINE_START(RISCPC, "Acorn-RiscPC") 218 /* Maintainer: Russell King */ 219 .atag_offset = 0x100, 220 .reserve_lp0 = 1, 221 .reserve_lp1 = 1, 222 .map_io = rpc_map_io, 223 .init_irq = rpc_init_irq, 224 .init_time = ioc_timer_init, 225 .restart = rpc_restart, 226 MACHINE_END 227