diff options
Diffstat (limited to 'arch/arm/mach-ep93xx/ts72xx.c')
| -rw-r--r-- | arch/arm/mach-ep93xx/ts72xx.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/ts72xx.c b/arch/arm/mach-ep93xx/ts72xx.c new file mode 100644 index 000000000..61f4b5dc4 --- /dev/null +++ b/arch/arm/mach-ep93xx/ts72xx.c @@ -0,0 +1,252 @@ +/* + * 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->priv; + + 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->priv; + 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 |