/* * linux/arch/arm/mach-rpc/riscpc.c * * Copyright (C) 1998-2001 Russell King * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Architecture specific fixups. */ #include <linux/kernel.h> #include <linux/tty.h> #include <linux/delay.h> #include <linux/pm.h> #include <linux/init.h> #include <linux/sched.h> #include <linux/device.h> #include <linux/serial_8250.h> #include <asm/elf.h> #include <asm/io.h> #include <asm/mach-types.h> #include <asm/hardware.h> #include <asm/page.h> #include <asm/domain.h> #include <asm/setup.h> #include <asm/mach/map.h> #include <asm/mach/arch.h> #include <asm/mach/time.h> extern void rpc_init_irq(void); unsigned int vram_size; unsigned int memc_ctrl_reg; unsigned int number_mfm_drives; static int __init parse_tag_acorn(const struct tag *tag) { memc_ctrl_reg = tag->u.acorn.memc_control_reg; number_mfm_drives = tag->u.acorn.adfsdrives; switch (tag->u.acorn.vram_pages) { case 512: vram_size += PAGE_SIZE * 256; case 256: vram_size += PAGE_SIZE * 256; default: break; } #if 0 if (vram_size) { desc->video_start = 0x02000000; desc->video_end = 0x02000000 + vram_size; } #endif return 0; } __tagtable(ATAG_ACORN, parse_tag_acorn); static struct map_desc rpc_io_desc[] __initdata = { { /* VRAM */ .virtual = SCREEN_BASE, .pfn = __phys_to_pfn(SCREEN_START), .length = 2*1048576, .type = MT_DEVICE }, { /* IO space */ .virtual = (u32)IO_BASE, .pfn = __phys_to_pfn(IO_START), .length = IO_SIZE , .type = MT_DEVICE }, { /* EASI space */ .virtual = EASI_BASE, .pfn = __phys_to_pfn(EASI_START), .length = EASI_SIZE, .type = MT_DEVICE } }; static void __init rpc_map_io(void) { iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc)); /* * Turn off floppy. */ outb(0xc, 0x3f2); /* * RiscPC can't handle half-word loads and stores */ elf_hwcap &= ~HWCAP_HALF; } static struct resource acornfb_resources[] = { { /* VIDC */ .start = 0x03400000, .end = 0x035fffff, .flags = IORESOURCE_MEM, }, { .start = IRQ_VSYNCPULSE, .end = IRQ_VSYNCPULSE, .flags = IORESOURCE_IRQ, }, }; static struct platform_device acornfb_device = { .name = "acornfb", .id = -1, .dev = { .coherent_dma_mask = 0xffffffff, }, .num_resources = ARRAY_SIZE(acornfb_resources), .resource = acornfb_resources, }; static struct resource iomd_resources[] = { { .start = 0x03200000, .end = 0x0320ffff, .flags = IORESOURCE_MEM, }, }; static struct platform_device iomd_device = { .name = "iomd", .id = -1, .num_resources = ARRAY_SIZE(iomd_resources), .resource = iomd_resources, }; static struct platform_device kbd_device = { .name = "kart", .id = -1, .dev = { .parent = &iomd_device.dev, }, }; static struct plat_serial8250_port serial_platform_data[] = { { .mapbase = 0x03010fe0, .irq = 10, .uartclk = 1843200, .regshift = 2, .iotype = UPIO_MEM, .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST, }, { }, }; static struct platform_device serial_device = { .name = "serial8250", .id = PLAT8250_DEV_PLATFORM, .dev = { .platform_data = serial_platform_data, }, }; static struct platform_device *devs[] __initdata = { &iomd_device, &kbd_device, &serial_device, &acornfb_device, }; static int __init rpc_init(void) { return platform_add_devices(devs, ARRAY_SIZE(devs)); } arch_initcall(rpc_init); extern struct sys_timer ioc_timer; MACHINE_START(RISCPC, "Acorn-RiscPC") /* Maintainer: Russell King */ .phys_io = 0x03000000, .io_pg_offst = ((0xe0000000) >> 18) & 0xfffc, .boot_params = 0x10000100, .reserve_lp0 = 1, .reserve_lp1 = 1, .map_io = rpc_map_io, .init_irq = rpc_init_irq, .timer = &ioc_timer, MACHINE_END