[linux-2.6-block.git] / arch / arm / mach-ep93xx / ts72xx.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->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
Commit	Line	Data
e7736d47 LB	1	/*
	2	* arch/arm/mach-ep93xx/ts72xx.c
	3	* Technologic Systems TS72xx SBC support.
	4	*
	5	* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or (at
	10	* your option) any later version.
	11	*/
	12
030d2dd4 HS	13	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
030d2dd4 HS	14
e7736d47 LB	15	#include <linux/kernel.h>
e7736d47 LB	16	#include <linux/init.h>
7ba01f97	17	#include <linux/platform_device.h>
fced80c7	18	#include <linux/io.h>
583ddafe	19	#include <linux/m48t86.h>
030d2dd4 HS	20	#include <linux/mtd/nand.h>
030d2dd4 HS	21	#include <linux/mtd/partitions.h>
583ddafe	22
a09e64fb	23	#include <mach/hardware.h>
583ddafe	24
e7736d47	25	#include <asm/mach-types.h>
e7736d47	26	#include <asm/mach/map.h>
583ddafe HS	27	#include <asm/mach/arch.h>
583ddafe HS	28
258249ec	29	#include "soc.h"
e4d4a902	30	#include "ts72xx.h"
e7736d47 LB	31
	32	static struct map_desc ts72xx_io_desc[] __initdata = {
	33	{
29fe651f	34	.virtual = (unsigned long)TS72XX_MODEL_VIRT_BASE,
e7736d47 LB	35	.pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
	36	.length = TS72XX_MODEL_SIZE,
	37	.type = MT_DEVICE,
	38	}, {
29fe651f	39	.virtual = (unsigned long)TS72XX_OPTIONS_VIRT_BASE,
e7736d47 LB	40	.pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
	41	.length = TS72XX_OPTIONS_SIZE,
	42	.type = MT_DEVICE,
	43	}, {
29fe651f	44	.virtual = (unsigned long)TS72XX_OPTIONS2_VIRT_BASE,
e7736d47 LB	45	.pfn = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
	46	.length = TS72XX_OPTIONS2_SIZE,
	47	.type = MT_DEVICE,
7ba01f97	48	}, {
29fe651f	49	.virtual = (unsigned long)TS72XX_RTC_INDEX_VIRT_BASE,
7ba01f97 LB	50	.pfn = __phys_to_pfn(TS72XX_RTC_INDEX_PHYS_BASE),
	51	.length = TS72XX_RTC_INDEX_SIZE,
	52	.type = MT_DEVICE,
	53	}, {
29fe651f	54	.virtual = (unsigned long)TS72XX_RTC_DATA_VIRT_BASE,
7ba01f97 LB	55	.pfn = __phys_to_pfn(TS72XX_RTC_DATA_PHYS_BASE),
	56	.length = TS72XX_RTC_DATA_SIZE,
	57	.type = MT_DEVICE,
e7736d47 LB	58	}
	59	};
	60
030d2dd4 HS	61	static void __init ts72xx_map_io(void)
	62	{
	63	ep93xx_map_io();
	64	iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
	65	}
	66
	67
	68	/*************************************************************************
	69	* NAND flash
	70	*************************************************************************/
	71	#define TS72XX_NAND_CONTROL_ADDR_LINE 22 /* 0xN0400000 */
	72	#define TS72XX_NAND_BUSY_ADDR_LINE 23 /* 0xN0800000 */
	73
	74	static void ts72xx_nand_hwcontrol(struct mtd_info *mtd,
	75	int cmd, unsigned int ctrl)
	76	{
	77	struct nand_chip *chip = mtd->priv;
	78
	79	if (ctrl & NAND_CTRL_CHANGE) {
	80	void __iomem *addr = chip->IO_ADDR_R;
	81	unsigned char bits;
	82
	83	addr += (1 << TS72XX_NAND_CONTROL_ADDR_LINE);
	84
	85	bits = __raw_readb(addr) & ~0x07;
	86	bits \|= (ctrl & NAND_NCE) << 2; /* bit 0 -> bit 2 */
	87	bits \|= (ctrl & NAND_CLE); /* bit 1 -> bit 1 */
	88	bits \|= (ctrl & NAND_ALE) >> 2; /* bit 2 -> bit 0 */
	89
	90	__raw_writeb(bits, addr);
e7736d47	91	}
e7736d47	92
030d2dd4 HS	93	if (cmd != NAND_CMD_NONE)
	94	__raw_writeb(cmd, chip->IO_ADDR_W);
	95	}
	96
	97	static int ts72xx_nand_device_ready(struct mtd_info *mtd)
	98	{
	99	struct nand_chip *chip = mtd->priv;
	100	void __iomem *addr = chip->IO_ADDR_R;
	101
	102	addr += (1 << TS72XX_NAND_BUSY_ADDR_LINE);
	103
	104	return !!(__raw_readb(addr) & 0x20);
	105	}
	106
030d2dd4 HS	107	#define TS72XX_BOOTROM_PART_SIZE (SZ_16K)
	108	#define TS72XX_REDBOOT_PART_SIZE (SZ_2M + SZ_1M)
	109
	110	static struct mtd_partition ts72xx_nand_parts[] = {
e7736d47	111	{
030d2dd4 HS	112	.name = "TS-BOOTROM",
	113	.offset = 0,
	114	.size = TS72XX_BOOTROM_PART_SIZE,
	115	.mask_flags = MTD_WRITEABLE, /* force read-only */
e7736d47	116	}, {
030d2dd4	117	.name = "Linux",
78dd9e35 DES	118	.offset = MTDPART_OFS_RETAIN,
	119	.size = TS72XX_REDBOOT_PART_SIZE,
	120	/* leave so much for last partition */
e7736d47	121	}, {
030d2dd4 HS	122	.name = "RedBoot",
	123	.offset = MTDPART_OFS_APPEND,
	124	.size = MTDPART_SIZ_FULL,
	125	.mask_flags = MTD_WRITEABLE, /* force read-only */
	126	},
e7736d47 LB	127	};
e7736d47 LB	128
030d2dd4 HS	129	static struct platform_nand_data ts72xx_nand_data = {
	130	.chip = {
	131	.nr_chips = 1,
	132	.chip_offset = 0,
	133	.chip_delay = 15,
78dd9e35 DES	134	.partitions = ts72xx_nand_parts,
78dd9e35 DES	135	.nr_partitions = ARRAY_SIZE(ts72xx_nand_parts),
030d2dd4 HS	136	},
	137	.ctrl = {
	138	.cmd_ctrl = ts72xx_nand_hwcontrol,
	139	.dev_ready = ts72xx_nand_device_ready,
	140	},
	141	};
	142
	143	static struct resource ts72xx_nand_resource[] = {
	144	{
	145	.start = 0, /* filled in later */
	146	.end = 0, /* filled in later */
	147	.flags = IORESOURCE_MEM,
	148	},
	149	};
	150
	151	static struct platform_device ts72xx_nand_flash = {
	152	.name = "gen_nand",
	153	.id = -1,
	154	.dev.platform_data = &ts72xx_nand_data,
	155	.resource = ts72xx_nand_resource,
	156	.num_resources = ARRAY_SIZE(ts72xx_nand_resource),
	157	};
	158
	159
3174c88a HS	160	static void __init ts72xx_register_flash(void)
3174c88a HS	161	{
16bcf78f HS	162	/*
	163	* TS7200 has NOR flash all other TS72xx board have NAND flash.
	164	*/
030d2dd4	165	if (board_is_ts7200()) {
16bcf78f	166	ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_16M);
030d2dd4 HS	167	} else {
	168	resource_size_t start;
	169
	170	if (is_ts9420_installed())
	171	start = EP93XX_CS7_PHYS_BASE;
	172	else
	173	start = EP93XX_CS6_PHYS_BASE;
	174
	175	ts72xx_nand_resource[0].start = start;
	176	ts72xx_nand_resource[0].end = start + SZ_16M - 1;
	177
	178	platform_device_register(&ts72xx_nand_flash);
	179	}
3174c88a HS	180	}
3174c88a HS	181
030d2dd4	182
fd0a0ac1	183	static unsigned char ts72xx_rtc_readbyte(unsigned long addr)
7ba01f97 LB	184	{
	185	__raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
	186	return __raw_readb(TS72XX_RTC_DATA_VIRT_BASE);
	187	}
	188
fd0a0ac1	189	static void ts72xx_rtc_writebyte(unsigned char value, unsigned long addr)
7ba01f97 LB	190	{
	191	__raw_writeb(addr, TS72XX_RTC_INDEX_VIRT_BASE);
	192	__raw_writeb(value, TS72XX_RTC_DATA_VIRT_BASE);
	193	}
	194
	195	static struct m48t86_ops ts72xx_rtc_ops = {
e48f3fa3 HS	196	.readbyte = ts72xx_rtc_readbyte,
e48f3fa3 HS	197	.writebyte = ts72xx_rtc_writebyte,
7ba01f97 LB	198	};
	199
	200	static struct platform_device ts72xx_rtc_device = {
e48f3fa3 HS	201	.name = "rtc-m48t86",
	202	.id = -1,
	203	.dev = {
	204	.platform_data = &ts72xx_rtc_ops,
7ba01f97	205	},
e48f3fa3	206	.num_resources = 0,
7ba01f97 LB	207	};
7ba01f97 LB	208
12926dc4 MW	209	static struct resource ts72xx_wdt_resources[] = {
	210	{
	211	.start = TS72XX_WDT_CONTROL_PHYS_BASE,
	212	.end = TS72XX_WDT_CONTROL_PHYS_BASE + SZ_4K - 1,
	213	.flags = IORESOURCE_MEM,
	214	},
	215	{
	216	.start = TS72XX_WDT_FEED_PHYS_BASE,
	217	.end = TS72XX_WDT_FEED_PHYS_BASE + SZ_4K - 1,
	218	.flags = IORESOURCE_MEM,
	219	},
	220	};
	221
	222	static struct platform_device ts72xx_wdt_device = {
	223	.name = "ts72xx-wdt",
	224	.id = -1,
	225	.num_resources = ARRAY_SIZE(ts72xx_wdt_resources),
	226	.resource = ts72xx_wdt_resources,
	227	};
	228
b370e082	229	static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
e48f3fa3	230	.phy_id = 1,
730ee9f3 LB	231	};
730ee9f3 LB	232
e7736d47 LB	233	static void __init ts72xx_init_machine(void)
	234	{
	235	ep93xx_init_devices();
3174c88a	236	ts72xx_register_flash();
7ba01f97	237	platform_device_register(&ts72xx_rtc_device);
12926dc4	238	platform_device_register(&ts72xx_wdt_device);
730ee9f3	239
a0a08fdc	240	ep93xx_register_eth(&ts72xx_eth_data, 1);
e7736d47 LB	241	}
	242
	243	MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
	244	/* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
e562cf17	245	.atag_offset = 0x100,
e7736d47 LB	246	.map_io = ts72xx_map_io,
e7736d47 LB	247	.init_irq = ep93xx_init_irq,
6bb27d73	248	.init_time = ep93xx_timer_init,
e7736d47	249	.init_machine = ts72xx_init_machine,
c914283f	250	.init_late = ep93xx_init_late,
3275166e	251	.restart = ep93xx_restart,
e7736d47	252	MACHINE_END