^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/arch/arm/mach-rpc/riscpc.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1998-2001 Russell King
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Architecture specific fixups.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/serial_8250.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/ata_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/mach-types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <mach/hardware.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <asm/hardware/iomd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <asm/domain.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <asm/system_misc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <asm/mach/map.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <asm/mach/arch.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <asm/mach/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) extern void rpc_init_irq(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) unsigned int vram_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) unsigned int memc_ctrl_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) unsigned int number_mfm_drives;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static int __init parse_tag_acorn(const struct tag *tag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) memc_ctrl_reg = tag->u.acorn.memc_control_reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) number_mfm_drives = tag->u.acorn.adfsdrives;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) switch (tag->u.acorn.vram_pages) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) case 512:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) vram_size += PAGE_SIZE * 256;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) fallthrough; /* ??? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) case 256:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) vram_size += PAGE_SIZE * 256;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (vram_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) desc->video_start = 0x02000000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) desc->video_end = 0x02000000 + vram_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) __tagtable(ATAG_ACORN, parse_tag_acorn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static struct map_desc rpc_io_desc[] __initdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) { /* VRAM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) .virtual = SCREEN_BASE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .pfn = __phys_to_pfn(SCREEN_START),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .length = 2*1048576,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) .type = MT_DEVICE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }, { /* IO space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) .virtual = (u32)IO_BASE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .pfn = __phys_to_pfn(IO_START),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .length = IO_SIZE ,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .type = MT_DEVICE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }, { /* EASI space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) .virtual = (unsigned long)EASI_BASE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) .pfn = __phys_to_pfn(EASI_START),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) .length = EASI_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) .type = MT_DEVICE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static void __init rpc_map_io(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) iotable_init(rpc_io_desc, ARRAY_SIZE(rpc_io_desc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * Turn off floppy.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) writeb(0xc, PCIO_BASE + (0x3f2 << 2));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * RiscPC can't handle half-word loads and stores
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) elf_hwcap &= ~HWCAP_HALF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static struct resource acornfb_resources[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /* VIDC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) DEFINE_RES_MEM(0x03400000, 0x00200000),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) DEFINE_RES_IRQ(IRQ_VSYNCPULSE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static struct platform_device acornfb_device = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .name = "acornfb",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .id = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .dev = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .coherent_dma_mask = 0xffffffff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .num_resources = ARRAY_SIZE(acornfb_resources),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .resource = acornfb_resources,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static struct resource iomd_resources[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) DEFINE_RES_MEM(0x03200000, 0x10000),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static struct platform_device iomd_device = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .name = "iomd",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .id = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .num_resources = ARRAY_SIZE(iomd_resources),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .resource = iomd_resources,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static struct resource iomd_kart_resources[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) DEFINE_RES_IRQ(IRQ_KEYBOARDRX),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) DEFINE_RES_IRQ(IRQ_KEYBOARDTX),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static struct platform_device kbd_device = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .name = "kart",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .id = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .dev = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .parent = &iomd_device.dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) .num_resources = ARRAY_SIZE(iomd_kart_resources),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) .resource = iomd_kart_resources,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static struct plat_serial8250_port serial_platform_data[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .mapbase = 0x03010fe0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) .irq = IRQ_SERIALPORT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) .uartclk = 1843200,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) .regshift = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) .iotype = UPIO_MEM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_SKIP_TEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static struct platform_device serial_device = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) .name = "serial8250",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) .id = PLAT8250_DEV_PLATFORM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) .dev = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) .platform_data = serial_platform_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static struct pata_platform_info pata_platform_data = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .ioport_shift = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static struct resource pata_resources[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) DEFINE_RES_MEM(0x030107c0, 0x20),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) DEFINE_RES_MEM(0x03010fd8, 0x04),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) DEFINE_RES_IRQ(IRQ_HARDDISK),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) static struct platform_device pata_device = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) .name = "pata_platform",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) .id = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) .num_resources = ARRAY_SIZE(pata_resources),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) .resource = pata_resources,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) .dev = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) .platform_data = &pata_platform_data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) .coherent_dma_mask = ~0, /* grumble */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static struct platform_device *devs[] __initdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) &iomd_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) &kbd_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) &serial_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) &acornfb_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) &pata_device,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static struct i2c_board_info i2c_rtc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) I2C_BOARD_INFO("pcf8583", 0x50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static int __init rpc_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) i2c_register_board_info(0, &i2c_rtc, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) return platform_add_devices(devs, ARRAY_SIZE(devs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) arch_initcall(rpc_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static void rpc_restart(enum reboot_mode mode, const char *cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) iomd_writeb(0, IOMD_ROMCR0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * Jump into the ROM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) soft_restart(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) void ioc_timer_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) MACHINE_START(RISCPC, "Acorn-RiscPC")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) /* Maintainer: Russell King */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) .atag_offset = 0x100,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) .reserve_lp0 = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) .reserve_lp1 = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) .map_io = rpc_map_io,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) .init_irq = rpc_init_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) .init_time = ioc_timer_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) .restart = rpc_restart,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) MACHINE_END
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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