[deliverable/linux.git] / drivers / mtd / maps / scx200_docflash.c

/* linux/drivers/mtd/maps/scx200_docflash.c

   Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>

   National Semiconductor SCx200 flash mapped with DOCCS
*/

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>

#include <linux/pci.h>
#include <linux/scx200.h>

#define NAME "scx200_docflash"

MODULE_AUTHOR("Christer Weinigel <wingel@hack.org>");
MODULE_DESCRIPTION("NatSemi SCx200 DOCCS Flash Driver");
MODULE_LICENSE("GPL");

static int probe = 0;		/* Don't autoprobe */
static unsigned size = 0x1000000; /* 16 MiB the whole ISA address space */
static unsigned width = 8;	/* Default to 8 bits wide */
static char *flashtype = "cfi_probe";

module_param(probe, int, 0);
MODULE_PARM_DESC(probe, "Probe for a BIOS mapping");
module_param(size, int, 0);
MODULE_PARM_DESC(size, "Size of the flash mapping");
module_param(width, int, 0);
MODULE_PARM_DESC(width, "Data width of the flash mapping (8/16)");
module_param(flashtype, charp, 0);
MODULE_PARM_DESC(flashtype, "Type of MTD probe to do");

static struct resource docmem = {
	.flags = IORESOURCE_MEM,
	.name  = "NatSemi SCx200 DOCCS Flash",
};

static struct mtd_info *mymtd;

static struct mtd_partition partition_info[] = {
	{
		.name   = "DOCCS Boot kernel",
		.offset = 0,
		.size   = 0xc0000
	},
	{
		.name   = "DOCCS Low BIOS",
		.offset = 0xc0000,
		.size   = 0x40000
	},
	{
		.name   = "DOCCS File system",
		.offset = 0x100000,
		.size   = ~0	/* calculate from flash size */
	},
	{
		.name   = "DOCCS High BIOS",
		.offset = ~0, 	/* calculate from flash size */
		.size   = 0x80000
	},
};
#define NUM_PARTITIONS ARRAY_SIZE(partition_info)

static struct map_info scx200_docflash_map = {
	.name      = "NatSemi SCx200 DOCCS Flash",
};

static int __init init_scx200_docflash(void)
{
	unsigned u;
	unsigned base;
	unsigned ctrl;
	unsigned pmr;
	struct pci_dev *bridge;

	printk(KERN_DEBUG NAME ": NatSemi SCx200 DOCCS Flash Driver\n");

	if ((bridge = pci_get_device(PCI_VENDOR_ID_NS,
				      PCI_DEVICE_ID_NS_SCx200_BRIDGE,
				      NULL)) == NULL)
		return -ENODEV;

	/* check that we have found the configuration block */
	if (!scx200_cb_present()) {
		pci_dev_put(bridge);
		return -ENODEV;
	}

	if (probe) {
		/* Try to use the present flash mapping if any */
		pci_read_config_dword(bridge, SCx200_DOCCS_BASE, &base);
		pci_read_config_dword(bridge, SCx200_DOCCS_CTRL, &ctrl);
		pci_dev_put(bridge);

		pmr = inl(scx200_cb_base + SCx200_PMR);

		if (base == 0
		    || (ctrl & 0x07000000) != 0x07000000
		    || (ctrl & 0x0007ffff) == 0)
			return -ENODEV;

		size = ((ctrl&0x1fff)<<13) + (1<<13);

		for (u = size; u > 1; u >>= 1)
			;
		if (u != 1)
			return -ENODEV;

		if (pmr & (1<<6))
			width = 16;
		else
			width = 8;

		docmem.start = base;
		docmem.end = base + size;

		if (request_resource(&iomem_resource, &docmem)) {
			printk(KERN_ERR NAME ": unable to allocate memory for flash mapping\n");
			return -ENOMEM;
		}
	} else {
		pci_dev_put(bridge);
		for (u = size; u > 1; u >>= 1)
			;
		if (u != 1) {
			printk(KERN_ERR NAME ": invalid size for flash mapping\n");
			return -EINVAL;
		}

		if (width != 8 && width != 16) {
			printk(KERN_ERR NAME ": invalid bus width for flash mapping\n");
			return -EINVAL;
		}

		if (allocate_resource(&iomem_resource, &docmem,
				      size,
				      0xc0000000, 0xffffffff,
				      size, NULL, NULL)) {
			printk(KERN_ERR NAME ": unable to allocate memory for flash mapping\n");
			return -ENOMEM;
		}

		ctrl = 0x07000000 | ((size-1) >> 13);

		printk(KERN_INFO "DOCCS BASE=0x%08lx, CTRL=0x%08lx\n", (long)docmem.start, (long)ctrl);

		pci_write_config_dword(bridge, SCx200_DOCCS_BASE, docmem.start);
		pci_write_config_dword(bridge, SCx200_DOCCS_CTRL, ctrl);
		pmr = inl(scx200_cb_base + SCx200_PMR);

		if (width == 8) {
			pmr &= ~(1<<6);
		} else {
			pmr |= (1<<6);
		}
		outl(pmr, scx200_cb_base + SCx200_PMR);
	}

	printk(KERN_INFO NAME ": DOCCS mapped at %pR, width %d\n",
	       &docmem, width);

	scx200_docflash_map.size = size;
	if (width == 8)
		scx200_docflash_map.bankwidth = 1;
	else
		scx200_docflash_map.bankwidth = 2;

	simple_map_init(&scx200_docflash_map);

	scx200_docflash_map.phys = docmem.start;
	scx200_docflash_map.virt = ioremap(docmem.start, scx200_docflash_map.size);
	if (!scx200_docflash_map.virt) {
		printk(KERN_ERR NAME ": failed to ioremap the flash\n");
		release_resource(&docmem);
		return -EIO;
	}

	mymtd = do_map_probe(flashtype, &scx200_docflash_map);
	if (!mymtd) {
		printk(KERN_ERR NAME ": unable to detect flash\n");
		iounmap(scx200_docflash_map.virt);
		release_resource(&docmem);
		return -ENXIO;
	}

	if (size < mymtd->size)
		printk(KERN_WARNING NAME ": warning, flash mapping is smaller than flash size\n");

	mymtd->owner = THIS_MODULE;

	partition_info[3].offset = mymtd->size-partition_info[3].size;
	partition_info[2].size = partition_info[3].offset-partition_info[2].offset;
	mtd_device_register(mymtd, partition_info, NUM_PARTITIONS);

	return 0;
}

static void __exit cleanup_scx200_docflash(void)
{
	if (mymtd) {
		mtd_device_unregister(mymtd);
		map_destroy(mymtd);
	}
	if (scx200_docflash_map.virt) {
		iounmap(scx200_docflash_map.virt);
		release_resource(&docmem);
	}
}

module_init(init_scx200_docflash);
module_exit(cleanup_scx200_docflash);

/*
    Local variables:
        compile-command: "make -k -C ../../.. SUBDIRS=drivers/mtd/maps modules"
        c-basic-offset: 8
    End:
*/
Commit	Line	Data
69f34c98	1	/* linux/drivers/mtd/maps/scx200_docflash.c
1da177e4 LT	2
	3	Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
	4
1da177e4 LT	5	National Semiconductor SCx200 flash mapped with DOCCS
	6	*/
	7
	8	#include <linux/module.h>
1da177e4 LT	9	#include <linux/types.h>
	10	#include <linux/kernel.h>
	11	#include <linux/init.h>
	12	#include <asm/io.h>
	13	#include <linux/mtd/mtd.h>
	14	#include <linux/mtd/map.h>
	15	#include <linux/mtd/partitions.h>
	16
	17	#include <linux/pci.h>
	18	#include <linux/scx200.h>
	19
	20	#define NAME "scx200_docflash"
	21
	22	MODULE_AUTHOR("Christer Weinigel <wingel@hack.org>");
	23	MODULE_DESCRIPTION("NatSemi SCx200 DOCCS Flash Driver");
	24	MODULE_LICENSE("GPL");
	25
	26	static int probe = 0; /* Don't autoprobe */
	27	static unsigned size = 0x1000000; /* 16 MiB the whole ISA address space */
	28	static unsigned width = 8; /* Default to 8 bits wide */
	29	static char *flashtype = "cfi_probe";
	30
	31	module_param(probe, int, 0);
	32	MODULE_PARM_DESC(probe, "Probe for a BIOS mapping");
	33	module_param(size, int, 0);
	34	MODULE_PARM_DESC(size, "Size of the flash mapping");
	35	module_param(width, int, 0);
	36	MODULE_PARM_DESC(width, "Data width of the flash mapping (8/16)");
	37	module_param(flashtype, charp, 0);
	38	MODULE_PARM_DESC(flashtype, "Type of MTD probe to do");
	39
	40	static struct resource docmem = {
	41	.flags = IORESOURCE_MEM,
	42	.name = "NatSemi SCx200 DOCCS Flash",
	43	};
	44
	45	static struct mtd_info *mymtd;
	46
1da177e4	47	static struct mtd_partition partition_info[] = {
69f34c98 TG	48	{
	49	.name = "DOCCS Boot kernel",
	50	.offset = 0,
1da177e4 LT	51	.size = 0xc0000
1da177e4 LT	52	},
69f34c98 TG	53	{
	54	.name = "DOCCS Low BIOS",
	55	.offset = 0xc0000,
1da177e4 LT	56	.size = 0x40000
1da177e4 LT	57	},
69f34c98 TG	58	{
	59	.name = "DOCCS File system",
	60	.offset = 0x100000,
1da177e4 LT	61	.size = ~0 /* calculate from flash size */
1da177e4 LT	62	},
69f34c98 TG	63	{
69f34c98 TG	64	.name = "DOCCS High BIOS",
1da177e4 LT	65	.offset = ~0, /* calculate from flash size */
	66	.size = 0x80000
	67	},
	68	};
87d10f3c	69	#define NUM_PARTITIONS ARRAY_SIZE(partition_info)
1da177e4 LT	70
	71	static struct map_info scx200_docflash_map = {
	72	.name = "NatSemi SCx200 DOCCS Flash",
	73	};
	74
	75	static int __init init_scx200_docflash(void)
	76	{
	77	unsigned u;
	78	unsigned base;
	79	unsigned ctrl;
	80	unsigned pmr;
	81	struct pci_dev *bridge;
	82
	83	printk(KERN_DEBUG NAME ": NatSemi SCx200 DOCCS Flash Driver\n");
	84
dd8e9ed6	85	if ((bridge = pci_get_device(PCI_VENDOR_ID_NS,
1da177e4 LT	86	PCI_DEVICE_ID_NS_SCx200_BRIDGE,
	87	NULL)) == NULL)
	88	return -ENODEV;
	89
	90	/* check that we have found the configuration block */
dd8e9ed6 AC	91	if (!scx200_cb_present()) {
dd8e9ed6 AC	92	pci_dev_put(bridge);
1da177e4	93	return -ENODEV;
dd8e9ed6	94	}
1da177e4 LT	95
	96	if (probe) {
	97	/* Try to use the present flash mapping if any */
	98	pci_read_config_dword(bridge, SCx200_DOCCS_BASE, &base);
	99	pci_read_config_dword(bridge, SCx200_DOCCS_CTRL, &ctrl);
dd8e9ed6 AC	100	pci_dev_put(bridge);
dd8e9ed6 AC	101
1da177e4 LT	102	pmr = inl(scx200_cb_base + SCx200_PMR);
	103
	104	if (base == 0
	105	\|\| (ctrl & 0x07000000) != 0x07000000
	106	\|\| (ctrl & 0x0007ffff) == 0)
	107	return -ENODEV;
	108
	109	size = ((ctrl&0x1fff)<<13) + (1<<13);
	110
	111	for (u = size; u > 1; u >>= 1)
	112	;
	113	if (u != 1)
	114	return -ENODEV;
	115
	116	if (pmr & (1<<6))
	117	width = 16;
	118	else
	119	width = 8;
	120
	121	docmem.start = base;
	122	docmem.end = base + size;
	123
	124	if (request_resource(&iomem_resource, &docmem)) {
	125	printk(KERN_ERR NAME ": unable to allocate memory for flash mapping\n");
	126	return -ENOMEM;
	127	}
	128	} else {
dd8e9ed6	129	pci_dev_put(bridge);
1da177e4 LT	130	for (u = size; u > 1; u >>= 1)
	131	;
	132	if (u != 1) {
	133	printk(KERN_ERR NAME ": invalid size for flash mapping\n");
	134	return -EINVAL;
	135	}
69f34c98	136
1da177e4 LT	137	if (width != 8 && width != 16) {
	138	printk(KERN_ERR NAME ": invalid bus width for flash mapping\n");
	139	return -EINVAL;
	140	}
69f34c98 TG	141
69f34c98 TG	142	if (allocate_resource(&iomem_resource, &docmem,
1da177e4	143	size,
69f34c98	144	0xc0000000, 0xffffffff,
1da177e4 LT	145	size, NULL, NULL)) {
	146	printk(KERN_ERR NAME ": unable to allocate memory for flash mapping\n");
	147	return -ENOMEM;
	148	}
69f34c98	149
1da177e4 LT	150	ctrl = 0x07000000 \| ((size-1) >> 13);
	151
	152	printk(KERN_INFO "DOCCS BASE=0x%08lx, CTRL=0x%08lx\n", (long)docmem.start, (long)ctrl);
69f34c98	153
1da177e4 LT	154	pci_write_config_dword(bridge, SCx200_DOCCS_BASE, docmem.start);
	155	pci_write_config_dword(bridge, SCx200_DOCCS_CTRL, ctrl);
	156	pmr = inl(scx200_cb_base + SCx200_PMR);
69f34c98	157
1da177e4 LT	158	if (width == 8) {
	159	pmr &= ~(1<<6);
	160	} else {
	161	pmr \|= (1<<6);
	162	}
	163	outl(pmr, scx200_cb_base + SCx200_PMR);
	164	}
69f34c98	165
f9a5279c JP	166	printk(KERN_INFO NAME ": DOCCS mapped at %pR, width %d\n",
f9a5279c JP	167	&docmem, width);
1da177e4 LT	168
	169	scx200_docflash_map.size = size;
	170	if (width == 8)
	171	scx200_docflash_map.bankwidth = 1;
	172	else
	173	scx200_docflash_map.bankwidth = 2;
	174
	175	simple_map_init(&scx200_docflash_map);
	176
	177	scx200_docflash_map.phys = docmem.start;
	178	scx200_docflash_map.virt = ioremap(docmem.start, scx200_docflash_map.size);
	179	if (!scx200_docflash_map.virt) {
	180	printk(KERN_ERR NAME ": failed to ioremap the flash\n");
	181	release_resource(&docmem);
	182	return -EIO;
	183	}
	184
	185	mymtd = do_map_probe(flashtype, &scx200_docflash_map);
	186	if (!mymtd) {
	187	printk(KERN_ERR NAME ": unable to detect flash\n");
	188	iounmap(scx200_docflash_map.virt);
	189	release_resource(&docmem);
	190	return -ENXIO;
	191	}
	192
	193	if (size < mymtd->size)
	194	printk(KERN_WARNING NAME ": warning, flash mapping is smaller than flash size\n");
	195
	196	mymtd->owner = THIS_MODULE;
	197
1da177e4 LT	198	partition_info[3].offset = mymtd->size-partition_info[3].size;
1da177e4 LT	199	partition_info[2].size = partition_info[3].offset-partition_info[2].offset;
f6c11c18 JI	200	mtd_device_register(mymtd, partition_info, NUM_PARTITIONS);
f6c11c18 JI	201
1da177e4 LT	202	return 0;
	203	}
	204
	205	static void __exit cleanup_scx200_docflash(void)
	206	{
	207	if (mymtd) {
f6c11c18	208	mtd_device_unregister(mymtd);
1da177e4 LT	209	map_destroy(mymtd);
	210	}
	211	if (scx200_docflash_map.virt) {
	212	iounmap(scx200_docflash_map.virt);
	213	release_resource(&docmem);
	214	}
	215	}
	216
	217	module_init(init_scx200_docflash);
	218	module_exit(cleanup_scx200_docflash);
	219
	220	/*
	221	Local variables:
	222	compile-command: "make -k -C ../../.. SUBDIRS=drivers/mtd/maps modules"
	223	c-basic-offset: 8
	224	End:
	225	*/