16bcf78f8c
Create a core.c __init function to handle the physmap flash registration for all the ep93xx platforms. Also, modify all the ep93xx platforms to use this new function. This simplifies all the ep93xx platform init code and reduces the size of the kernel when including multiple ep93xx boards. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: Ryan Mallon <ryan@bluewatersys.com> Acked-by: Martin Guy <martinwguy@gmail.com> Acked-by: Hubert Feurstein <hubert.feurstein@contec.at> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
268 lines
6.7 KiB
C
268 lines
6.7 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_APPEND,
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.size = 0, /* filled in later */
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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 void ts72xx_nand_set_parts(uint64_t size,
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struct platform_nand_chip *chip)
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{
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/* Factory TS-72xx boards only come with 32MiB or 128MiB NAND options */
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if (size == SZ_32M || size == SZ_128M) {
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/* Set the "Linux" partition size */
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ts72xx_nand_parts[1].size = size - TS72XX_REDBOOT_PART_SIZE;
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chip->partitions = ts72xx_nand_parts;
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chip->nr_partitions = ARRAY_SIZE(ts72xx_nand_parts);
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} else {
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pr_warning("Unknown nand disk size:%lluMiB\n", size >> 20);
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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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.set_parts = ts72xx_nand_set_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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.phys_io = EP93XX_APB_PHYS_BASE,
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.io_pg_offst = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
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.boot_params = EP93XX_SDCE3_PHYS_BASE_SYNC + 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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