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224 lines
4.6 KiB
224 lines
4.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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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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* 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 <linux/ata_platform.h> |
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#include <linux/io.h> |
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#include <linux/i2c.h> |
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#include <linux/reboot.h> |
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#include <asm/elf.h> |
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#include <asm/mach-types.h> |
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#include <mach/hardware.h> |
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#include <asm/hardware/iomd.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/system_misc.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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fallthrough; /* ??? */ |
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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 = (unsigned long)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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writeb(0xc, PCIO_BASE + (0x3f2 << 2)); |
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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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DEFINE_RES_MEM(0x03400000, 0x00200000), |
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DEFINE_RES_IRQ(IRQ_VSYNCPULSE), |
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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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DEFINE_RES_MEM(0x03200000, 0x10000), |
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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 resource iomd_kart_resources[] = { |
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DEFINE_RES_IRQ(IRQ_KEYBOARDRX), |
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DEFINE_RES_IRQ(IRQ_KEYBOARDTX), |
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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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.num_resources = ARRAY_SIZE(iomd_kart_resources), |
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.resource = iomd_kart_resources, |
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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 = IRQ_SERIALPORT, |
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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 pata_platform_info pata_platform_data = { |
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.ioport_shift = 2, |
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}; |
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static struct resource pata_resources[] = { |
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DEFINE_RES_MEM(0x030107c0, 0x20), |
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DEFINE_RES_MEM(0x03010fd8, 0x04), |
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DEFINE_RES_IRQ(IRQ_HARDDISK), |
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}; |
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static struct platform_device pata_device = { |
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.name = "pata_platform", |
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.id = -1, |
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.num_resources = ARRAY_SIZE(pata_resources), |
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.resource = pata_resources, |
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.dev = { |
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.platform_data = &pata_platform_data, |
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.coherent_dma_mask = ~0, /* grumble */ |
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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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&pata_device, |
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}; |
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static struct i2c_board_info i2c_rtc = { |
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I2C_BOARD_INFO("pcf8583", 0x50) |
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}; |
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static int __init rpc_init(void) |
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{ |
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i2c_register_board_info(0, &i2c_rtc, 1); |
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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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static void rpc_restart(enum reboot_mode mode, const char *cmd) |
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{ |
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iomd_writeb(0, IOMD_ROMCR0); |
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/* |
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* Jump into the ROM |
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*/ |
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soft_restart(0); |
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} |
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void ioc_timer_init(void); |
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MACHINE_START(RISCPC, "Acorn-RiscPC") |
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/* Maintainer: Russell King */ |
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.atag_offset = 0x100, |
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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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.init_time = ioc_timer_init, |
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.restart = rpc_restart, |
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MACHINE_END
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