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