mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 00:34:20 +08:00
c993e09504
mtd_to_nand() was recently introduced to avoid direct accesses to the mtd->priv field. Update all ARM specific implementations to use this helper. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
253 lines
6.3 KiB
C
253 lines
6.3 KiB
C
/*
|
|
* arch/arm/mach-ep93xx/ts72xx.c
|
|
* Technologic Systems TS72xx SBC support.
|
|
*
|
|
* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or (at
|
|
* your option) any later version.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/m48t86.h>
|
|
#include <linux/mtd/nand.h>
|
|
#include <linux/mtd/partitions.h>
|
|
|
|
#include <mach/hardware.h>
|
|
|
|
#include <asm/mach-types.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/arch.h>
|
|
|
|
#include "soc.h"
|
|
#include "ts72xx.h"
|
|
|
|
static struct map_desc ts72xx_io_desc[] __initdata = {
|
|
{
|
|
.virtual = (unsigned long)TS72XX_MODEL_VIRT_BASE,
|
|
.pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
|
|
.length = TS72XX_MODEL_SIZE,
|
|
.type = MT_DEVICE,
|
|
}, {
|
|
.virtual = (unsigned long)TS72XX_OPTIONS_VIRT_BASE,
|
|
.pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
|
|
.length = TS72XX_OPTIONS_SIZE,
|
|
.type = MT_DEVICE,
|
|
}, {
|
|
.virtual = (unsigned long)TS72XX_OPTIONS2_VIRT_BASE,
|
|
.pfn = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
|
|
.length = TS72XX_OPTIONS2_SIZE,
|
|
.type = MT_DEVICE,
|
|
}, {
|
|
.virtual = (unsigned long)TS72XX_RTC_INDEX_VIRT_BASE,
|
|
.pfn = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
|
|
.length = TS72XX_RTC_INDEX_SIZE,
|
|
.type = MT_DEVICE,
|
|
}, {
|
|
.virtual = (unsigned long)TS72XX_RTC_DATA_VIRT_BASE,
|
|
.pfn = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
|
|
.length = TS72XX_RTC_DATA_SIZE,
|
|
.type = MT_DEVICE,
|
|
}
|
|
};
|
|
|
|
static void __init ts72xx_map_io(void)
|
|
{
|
|
ep93xx_map_io();
|
|
iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
|
|
}
|
|
|
|
|
|
/*************************************************************************
|
|
* NAND flash
|
|
*************************************************************************/
|
|
#define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */
|
|
#define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */
|
|
|
|
static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
|
|
int cmd, unsigned int ctrl)
|
|
{
|
|
struct nand_chip *chip = mtd_to_nand(mtd);
|
|
|
|
if (ctrl & NAND_CTRL_CHANGE) {
|
|
void __iomem *addr = chip->IO_ADDR_R;
|
|
unsigned char bits;
|
|
|
|
addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
|
|
|
|
bits = __raw_readb(addr) & ~0x07;
|
|
bits |= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
|
|
bits |= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */
|
|
bits |= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
|
|
|
|
__raw_writeb(bits, addr);
|
|
}
|
|
|
|
if (cmd != NAND_CMD_NONE)
|
|
__raw_writeb(cmd, chip->IO_ADDR_W);
|
|
}
|
|
|
|
static int ts72xx_nand_device_ready(struct mtd_info *mtd)
|
|
{
|
|
struct nand_chip *chip = mtd_to_nand(mtd);
|
|
void __iomem *addr = chip->IO_ADDR_R;
|
|
|
|
addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
|
|
|
|
return !!(__raw_readb(addr) & 0x20);
|
|
}
|
|
|
|
#define TS72XX_BOOTROM_PART_SIZE (SZ_16K)
|
|
#define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M)
|
|
|
|
static struct mtd_partition ts72xx_nand_parts[] = {
|
|
{
|
|
.name = "TS-BOOTROM",
|
|
.offset = 0,
|
|
.size = TS72XX_BOOTROM_PART_SIZE,
|
|
.mask_flags = MTD_WRITEABLE, /* force read-only */
|
|
}, {
|
|
.name = "Linux",
|
|
.offset = MTDPART_OFS_RETAIN,
|
|
.size = TS72XX_REDBOOT_PART_SIZE,
|
|
/* leave so much for last partition */
|
|
}, {
|
|
.name = "RedBoot",
|
|
.offset = MTDPART_OFS_APPEND,
|
|
.size = MTDPART_SIZ_FULL,
|
|
.mask_flags = MTD_WRITEABLE, /* force read-only */
|
|
},
|
|
};
|
|
|
|
static struct platform_nand_data ts72xx_nand_data = {
|
|
.chip = {
|
|
.nr_chips = 1,
|
|
.chip_offset = 0,
|
|
.chip_delay = 15,
|
|
.partitions = ts72xx_nand_parts,
|
|
.nr_partitions = ARRAY_SIZE(ts72xx_nand_parts),
|
|
},
|
|
.ctrl = {
|
|
.cmd_ctrl = ts72xx_nand_hwcontrol,
|
|
.dev_ready = ts72xx_nand_device_ready,
|
|
},
|
|
};
|
|
|
|
static struct resource ts72xx_nand_resource[] = {
|
|
{
|
|
.start = 0, /* filled in later */
|
|
.end = 0, /* filled in later */
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
};
|
|
|
|
static struct platform_device ts72xx_nand_flash = {
|
|
.name = "gen_nand",
|
|
.id = -1,
|
|
.dev.platform_data = &ts72xx_nand_data,
|
|
.resource = ts72xx_nand_resource,
|
|
.num_resources = ARRAY_SIZE(ts72xx_nand_resource),
|
|
};
|
|
|
|
|
|
static void __init ts72xx_register_flash(void)
|
|
{
|
|
/*
|
|
* TS7200 has NOR flash all other TS72xx board have NAND flash.
|
|
*/
|
|
if (board_is_ts7200()) {
|
|
ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
|
|
} else {
|
|
resource_size_t start;
|
|
|
|
if (is_ts9420_installed())
|
|
start = EP93XX_CS7_PHYS_BASE;
|
|
else
|
|
start = EP93XX_CS6_PHYS_BASE;
|
|
|
|
ts72xx_nand_resource[0].start = start;
|
|
ts72xx_nand_resource[0].end = start + SZ_16M - 1;
|
|
|
|
platform_device_register(&ts72xx_nand_flash);
|
|
}
|
|
}
|
|
|
|
|
|
static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
|
|
{
|
|
__raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
|
|
return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
|
|
}
|
|
|
|
static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
|
|
{
|
|
__raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
|
|
__raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
|
|
}
|
|
|
|
static struct m48t86_ops ts72xx_rtc_ops = {
|
|
.readbyte = ts72xx_rtc_readbyte,
|
|
.writebyte = ts72xx_rtc_writebyte,
|
|
};
|
|
|
|
static struct platform_device ts72xx_rtc_device = {
|
|
.name = "rtc-m48t86",
|
|
.id = -1,
|
|
.dev = {
|
|
.platform_data = &ts72xx_rtc_ops,
|
|
},
|
|
.num_resources = 0,
|
|
};
|
|
|
|
static struct resource ts72xx_wdt_resources[] = {
|
|
{
|
|
.start = TS72XX_WDT_CONTROL_PHYS_BASE,
|
|
.end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
{
|
|
.start = TS72XX_WDT_FEED_PHYS_BASE,
|
|
.end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1,
|
|
.flags = IORESOURCE_MEM,
|
|
},
|
|
};
|
|
|
|
static struct platform_device ts72xx_wdt_device = {
|
|
.name = "ts72xx-wdt",
|
|
.id = -1,
|
|
.num_resources = ARRAY_SIZE(ts72xx_wdt_resources),
|
|
.resource = ts72xx_wdt_resources,
|
|
};
|
|
|
|
static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
|
|
.phy_id = 1,
|
|
};
|
|
|
|
static void __init ts72xx_init_machine(void)
|
|
{
|
|
ep93xx_init_devices();
|
|
ts72xx_register_flash();
|
|
platform_device_register(&ts72xx_rtc_device);
|
|
platform_device_register(&ts72xx_wdt_device);
|
|
|
|
ep93xx_register_eth(&ts72xx_eth_data, 1);
|
|
}
|
|
|
|
MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
|
|
/* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
|
|
.atag_offset = 0x100,
|
|
.map_io = ts72xx_map_io,
|
|
.init_irq = ep93xx_init_irq,
|
|
.init_time = ep93xx_timer_init,
|
|
.init_machine = ts72xx_init_machine,
|
|
.init_late = ep93xx_init_late,
|
|
.restart = ep93xx_restart,
|
|
MACHINE_END
|