diff options
Diffstat (limited to 'arch/arm/mach-rpc/riscpc.c')
| -rw-r--r-- | arch/arm/mach-rpc/riscpc.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/arch/arm/mach-rpc/riscpc.c b/arch/arm/mach-rpc/riscpc.c new file mode 100644 index 000000000..f70fb9c4b --- /dev/null +++ b/arch/arm/mach-rpc/riscpc.c @@ -0,0 +1,225 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/arch/arm/mach-rpc/riscpc.c + * + * Copyright (C) 1998-2001 Russell King + * + * 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 <linux/ata_platform.h> +#include <linux/io.h> +#include <linux/i2c.h> +#include <linux/reboot.h> + +#include <asm/elf.h> +#include <asm/mach-types.h> +#include <mach/hardware.h> +#include <asm/hardware/iomd.h> +#include <asm/page.h> +#include <asm/domain.h> +#include <asm/setup.h> +#include <asm/system_misc.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; + fallthrough; /* ??? */ + case 256: + vram_size += PAGE_SIZE * 256; + break; + 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 = (unsigned long)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. + */ + writeb(0xc, PCIO_BASE + (0x3f2 << 2)); + + /* + * RiscPC can't handle half-word loads and stores + */ + elf_hwcap &= ~HWCAP_HALF; +} + +static struct resource acornfb_resources[] = { + /* VIDC */ + DEFINE_RES_MEM(0x03400000, 0x00200000), + DEFINE_RES_IRQ(IRQ_VSYNCPULSE), +}; + +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[] = { + DEFINE_RES_MEM(0x03200000, 0x10000), +}; + +static struct platform_device iomd_device = { + .name = "iomd", + .id = -1, + .num_resources = ARRAY_SIZE(iomd_resources), + .resource = iomd_resources, +}; + +static struct resource iomd_kart_resources[] = { + DEFINE_RES_IRQ(IRQ_KEYBOARDRX), + DEFINE_RES_IRQ(IRQ_KEYBOARDTX), +}; + +static struct platform_device kbd_device = { + .name = "kart", + .id = -1, + .dev = { + .parent = &iomd_device.dev, + }, + .num_resources = ARRAY_SIZE(iomd_kart_resources), + .resource = iomd_kart_resources, +}; + +static struct plat_serial8250_port serial_platform_data[] = { + { + .mapbase = 0x03010fe0, + .irq = IRQ_SERIALPORT, + .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 pata_platform_info pata_platform_data = { + .ioport_shift = 2, +}; + +static struct resource pata_resources[] = { + DEFINE_RES_MEM(0x030107c0, 0x20), + DEFINE_RES_MEM(0x03010fd8, 0x04), + DEFINE_RES_IRQ(IRQ_HARDDISK), +}; + +static struct platform_device pata_device = { + .name = "pata_platform", + .id = -1, + .num_resources = ARRAY_SIZE(pata_resources), + .resource = pata_resources, + .dev = { + .platform_data = &pata_platform_data, + .coherent_dma_mask = ~0, /* grumble */ + }, +}; + +static struct platform_device *devs[] __initdata = { + &iomd_device, + &kbd_device, + &serial_device, + &acornfb_device, + &pata_device, +}; + +static struct i2c_board_info i2c_rtc = { + I2C_BOARD_INFO("pcf8583", 0x50) +}; + +static int __init rpc_init(void) +{ + i2c_register_board_info(0, &i2c_rtc, 1); + return platform_add_devices(devs, ARRAY_SIZE(devs)); +} + +arch_initcall(rpc_init); + +static void rpc_restart(enum reboot_mode mode, const char *cmd) +{ + iomd_writeb(0, IOMD_ROMCR0); + + /* + * Jump into the ROM + */ + soft_restart(0); +} + +void ioc_timer_init(void); + +MACHINE_START(RISCPC, "Acorn-RiscPC") + /* Maintainer: Russell King */ + .atag_offset = 0x100, + .reserve_lp0 = 1, + .reserve_lp1 = 1, + .map_io = rpc_map_io, + .init_irq = rpc_init_irq, + .init_time = ioc_timer_init, + .restart = rpc_restart, +MACHINE_END |