253 lines
6.2 KiB
C
253 lines
6.2 KiB
C
/*
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* arch/arm/mach-ep93xx/ts72xx.c
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* Technologic Systems TS72xx SBC support.
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*
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* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/m48t86.h>
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#include <linux/mtd/nand.h>
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#include <linux/mtd/partitions.h>
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#include <mach/hardware.h>
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#include <mach/ts72xx.h>
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#include <asm/mach-types.h>
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#include <asm/mach/map.h>
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#include <asm/mach/arch.h>
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static struct map_desc ts72xx_io_desc[] __initdata = {
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{
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.virtual = TS72XX_MODEL_VIRT_BASE,
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.pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
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.length = TS72XX_MODEL_SIZE,
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.type = MT_DEVICE,
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}, {
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.virtual = TS72XX_OPTIONS_VIRT_BASE,
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.pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
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.length = TS72XX_OPTIONS_SIZE,
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.type = MT_DEVICE,
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}, {
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.virtual = TS72XX_OPTIONS2_VIRT_BASE,
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.pfn = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
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.length = TS72XX_OPTIONS2_SIZE,
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.type = MT_DEVICE,
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}, {
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.virtual = TS72XX_RTC_INDEX_VIRT_BASE,
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.pfn = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
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.length = TS72XX_RTC_INDEX_SIZE,
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.type = MT_DEVICE,
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}, {
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.virtual = TS72XX_RTC_DATA_VIRT_BASE,
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.pfn = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
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.length = TS72XX_RTC_DATA_SIZE,
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.type = MT_DEVICE,
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}
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};
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static void __init ts72xx_map_io(void)
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{
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ep93xx_map_io();
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iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
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}
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/*************************************************************************
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* NAND flash
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*************************************************************************/
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#define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */
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#define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */
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static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
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int cmd, unsigned int ctrl)
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{
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struct nand_chip *chip = mtd->priv;
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if (ctrl & NAND_CTRL_CHANGE) {
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void __iomem *addr = chip->IO_ADDR_R;
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unsigned char bits;
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addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
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bits = __raw_readb(addr) & ~0x07;
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bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
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bits |= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */
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bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
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__raw_writeb(bits, addr);
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}
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if (cmd != NAND_CMD_NONE)
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__raw_writeb(cmd, chip->IO_ADDR_W);
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}
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static int ts72xx_nand_device_ready(struct mtd_info *mtd)
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{
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struct nand_chip *chip = mtd->priv;
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void __iomem *addr = chip->IO_ADDR_R;
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addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
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return !!(__raw_readb(addr) & 0x20);
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}
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static const char *ts72xx_nand_part_probes[] = { "cmdlinepart", NULL };
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#define TS72XX_BOOTROM_PART_SIZE (SZ_16K)
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#define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M)
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static struct mtd_partition ts72xx_nand_parts[] = {
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{
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.name = "TS-BOOTROM",
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.offset = 0,
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.size = TS72XX_BOOTROM_PART_SIZE,
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.mask_flags = MTD_WRITEABLE, /* force read-only */
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}, {
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.name = "Linux",
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.offset = MTDPART_OFS_RETAIN,
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.size = TS72XX_REDBOOT_PART_SIZE,
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/* leave so much for last partition */
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}, {
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.name = "RedBoot",
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.offset = MTDPART_OFS_APPEND,
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.size = MTDPART_SIZ_FULL,
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.mask_flags = MTD_WRITEABLE, /* force read-only */
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},
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};
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static struct platform_nand_data ts72xx_nand_data = {
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.chip = {
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.nr_chips = 1,
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.chip_offset = 0,
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.chip_delay = 15,
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.part_probe_types = ts72xx_nand_part_probes,
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.partitions = ts72xx_nand_parts,
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.nr_partitions = ARRAY_SIZE(ts72xx_nand_parts),
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},
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.ctrl = {
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.cmd_ctrl = ts72xx_nand_hwcontrol,
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.dev_ready = ts72xx_nand_device_ready,
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},
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};
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static struct resource ts72xx_nand_resource[] = {
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{
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.start = 0, /* filled in later */
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.end = 0, /* filled in later */
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.flags = IORESOURCE_MEM,
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},
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};
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static struct platform_device ts72xx_nand_flash = {
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.name = "gen_nand",
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.id = -1,
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.dev.platform_data = &ts72xx_nand_data,
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.resource = ts72xx_nand_resource,
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.num_resources = ARRAY_SIZE(ts72xx_nand_resource),
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};
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static void __init ts72xx_register_flash(void)
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{
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/*
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* TS7200 has NOR flash all other TS72xx board have NAND flash.
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*/
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if (board_is_ts7200()) {
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ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
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} else {
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resource_size_t start;
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if (is_ts9420_installed())
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start = EP93XX_CS7_PHYS_BASE;
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else
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start = EP93XX_CS6_PHYS_BASE;
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ts72xx_nand_resource[0].start = start;
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ts72xx_nand_resource[0].end = start + SZ_16M - 1;
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platform_device_register(&ts72xx_nand_flash);
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}
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}
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static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
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{
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__raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
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return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
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}
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static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
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{
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__raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
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__raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
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}
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static struct m48t86_ops ts72xx_rtc_ops = {
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.readbyte = ts72xx_rtc_readbyte,
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.writebyte = ts72xx_rtc_writebyte,
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};
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static struct platform_device ts72xx_rtc_device = {
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.name = "rtc-m48t86",
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.id = -1,
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.dev = {
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.platform_data = &ts72xx_rtc_ops,
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},
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.num_resources = 0,
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};
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static struct resource ts72xx_wdt_resources[] = {
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{
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.start = TS72XX_WDT_CONTROL_PHYS_BASE,
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.end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = TS72XX_WDT_FEED_PHYS_BASE,
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.end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct platform_device ts72xx_wdt_device = {
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.name = "ts72xx-wdt",
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.id = -1,
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.num_resources = ARRAY_SIZE(ts72xx_wdt_resources),
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.resource = ts72xx_wdt_resources,
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};
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static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
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.phy_id = 1,
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};
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static void __init ts72xx_init_machine(void)
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{
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ep93xx_init_devices();
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ts72xx_register_flash();
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platform_device_register(&ts72xx_rtc_device);
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platform_device_register(&ts72xx_wdt_device);
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ep93xx_register_eth(&ts72xx_eth_data, 1);
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}
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MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
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/* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
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.atag_offset = 0x100,
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.map_io = ts72xx_map_io,
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.init_irq = ep93xx_init_irq,
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.timer = &ep93xx_timer,
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.init_machine = ts72xx_init_machine,
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MACHINE_END
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