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/*
* 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
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