[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / mtd / maps / ichxrom.c

/*
 * ichxrom.c
 *
 * Normal mappings of chips in physical memory
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/cfi.h>
#include <linux/mtd/flashchip.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/list.h>

#define xstr(s) str(s)
#define str(s) #s
#define MOD_NAME xstr(KBUILD_BASENAME)

#define ADDRESS_NAME_LEN 18

#define ROM_PROBE_STEP_SIZE (64*1024) /* 64KiB */

#define BIOS_CNTL	0x4e
#define FWH_DEC_EN1	0xE3
#define FWH_DEC_EN2	0xF0
#define FWH_SEL1	0xE8
#define FWH_SEL2	0xEE

struct ichxrom_window {
	void __iomem* virt;
	unsigned long phys;
	unsigned long size;
	struct list_head maps;
	struct resource rsrc;
	struct pci_dev *pdev;
};

struct ichxrom_map_info {
	struct list_head list;
	struct map_info map;
	struct mtd_info *mtd;
	struct resource rsrc;
	char map_name[sizeof(MOD_NAME) + 2 + ADDRESS_NAME_LEN];
};

static struct ichxrom_window ichxrom_window = {
	.maps = LIST_HEAD_INIT(ichxrom_window.maps),
};

static void ichxrom_cleanup(struct ichxrom_window *window)
{
	struct ichxrom_map_info *map, *scratch;
	u16 word;

	/* Disable writes through the rom window */
	pci_read_config_word(window->pdev, BIOS_CNTL, &word);
	pci_write_config_word(window->pdev, BIOS_CNTL, word & ~1);
	pci_dev_put(window->pdev);

	/* Free all of the mtd devices */
	list_for_each_entry_safe(map, scratch, &window->maps, list) {
		if (map->rsrc.parent)
			release_resource(&map->rsrc);
		mtd_device_unregister(map->mtd);
		map_destroy(map->mtd);
		list_del(&map->list);
		kfree(map);
	}
	if (window->rsrc.parent)
		release_resource(&window->rsrc);
	if (window->virt) {
		iounmap(window->virt);
		window->virt = NULL;
		window->phys = 0;
		window->size = 0;
		window->pdev = NULL;
	}
}


static int ichxrom_init_one(struct pci_dev *pdev,
			    const struct pci_device_id *ent)
{
	static char *rom_probe_types[] = { "cfi_probe", "jedec_probe", NULL };
	struct ichxrom_window *window = &ichxrom_window;
	struct ichxrom_map_info *map = NULL;
	unsigned long map_top;
	u8 byte;
	u16 word;

	/* For now I just handle the ichx and I assume there
	 * are not a lot of resources up at the top of the address
	 * space.  It is possible to handle other devices in the
	 * top 16MB but it is very painful.  Also since
	 * you can only really attach a FWH to an ICHX there
	 * a number of simplifications you can make.
	 *
	 * Also you can page firmware hubs if an 8MB window isn't enough
	 * but don't currently handle that case either.
	 */
	window->pdev = pdev;

	/* Find a region continuous to the end of the ROM window  */
	window->phys = 0;
	pci_read_config_byte(pdev, FWH_DEC_EN1, &byte);
	if (byte == 0xff) {
		window->phys = 0xffc00000;
		pci_read_config_byte(pdev, FWH_DEC_EN2, &byte);
		if ((byte & 0x0f) == 0x0f) {
			window->phys = 0xff400000;
		}
		else if ((byte & 0x0e) == 0x0e) {
			window->phys = 0xff500000;
		}
		else if ((byte & 0x0c) == 0x0c) {
			window->phys = 0xff600000;
		}
		else if ((byte & 0x08) == 0x08) {
			window->phys = 0xff700000;
		}
	}
	else if ((byte & 0xfe) == 0xfe) {
		window->phys = 0xffc80000;
	}
	else if ((byte & 0xfc) == 0xfc) {
		window->phys = 0xffd00000;
	}
	else if ((byte & 0xf8) == 0xf8) {
		window->phys = 0xffd80000;
	}
	else if ((byte & 0xf0) == 0xf0) {
		window->phys = 0xffe00000;
	}
	else if ((byte & 0xe0) == 0xe0) {
		window->phys = 0xffe80000;
	}
	else if ((byte & 0xc0) == 0xc0) {
		window->phys = 0xfff00000;
	}
	else if ((byte & 0x80) == 0x80) {
		window->phys = 0xfff80000;
	}

	if (window->phys == 0) {
		printk(KERN_ERR MOD_NAME ": Rom window is closed\n");
		goto out;
	}
	window->phys -= 0x400000UL;
	window->size = (0xffffffffUL - window->phys) + 1UL;

	/* Enable writes through the rom window */
	pci_read_config_word(pdev, BIOS_CNTL, &word);
	if (!(word & 1)  && (word & (1<<1))) {
		/* The BIOS will generate an error if I enable
		 * this device, so don't even try.
		 */
		printk(KERN_ERR MOD_NAME ": firmware access control, I can't enable writes\n");
		goto out;
	}
	pci_write_config_word(pdev, BIOS_CNTL, word | 1);

	/*
	 * Try to reserve the window mem region.  If this fails then
	 * it is likely due to the window being "reseved" by the BIOS.
	 */
	window->rsrc.name = MOD_NAME;
	window->rsrc.start = window->phys;
	window->rsrc.end   = window->phys + window->size - 1;
	window->rsrc.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
	if (request_resource(&iomem_resource, &window->rsrc)) {
		window->rsrc.parent = NULL;
		printk(KERN_DEBUG MOD_NAME ": "
		       "%s(): Unable to register resource %pR - kernel bug?\n",
		       __func__, &window->rsrc);
	}

	/* Map the firmware hub into my address space. */
	window->virt = ioremap_nocache(window->phys, window->size);
	if (!window->virt) {
		printk(KERN_ERR MOD_NAME ": ioremap(%08lx, %08lx) failed\n",
			window->phys, window->size);
		goto out;
	}

	/* Get the first address to look for an rom chip at */
	map_top = window->phys;
	if ((window->phys & 0x3fffff) != 0) {
		map_top = window->phys + 0x400000;
	}
#if 1
	/* The probe sequence run over the firmware hub lock
	 * registers sets them to 0x7 (no access).
	 * Probe at most the last 4M of the address space.
	 */
	if (map_top < 0xffc00000) {
		map_top = 0xffc00000;
	}
#endif
	/* Loop through and look for rom chips */
	while((map_top - 1) < 0xffffffffUL) {
		struct cfi_private *cfi;
		unsigned long offset;
		int i;

		if (!map) {
			map = kmalloc(sizeof(*map), GFP_KERNEL);
		}
		if (!map) {
			printk(KERN_ERR MOD_NAME ": kmalloc failed");
			goto out;
		}
		memset(map, 0, sizeof(*map));
		INIT_LIST_HEAD(&map->list);
		map->map.name = map->map_name;
		map->map.phys = map_top;
		offset = map_top - window->phys;
		map->map.virt = (void __iomem *)
			(((unsigned long)(window->virt)) + offset);
		map->map.size = 0xffffffffUL - map_top + 1UL;
		/* Set the name of the map to the address I am trying */
		sprintf(map->map_name, "%s @%08Lx",
			MOD_NAME, (unsigned long long)map->map.phys);

		/* Firmware hubs only use vpp when being programmed
		 * in a factory setting.  So in-place programming
		 * needs to use a different method.
		 */
		for(map->map.bankwidth = 32; map->map.bankwidth;
			map->map.bankwidth >>= 1)
		{
			char **probe_type;
			/* Skip bankwidths that are not supported */
			if (!map_bankwidth_supported(map->map.bankwidth))
				continue;

			/* Setup the map methods */
			simple_map_init(&map->map);

			/* Try all of the probe methods */
			probe_type = rom_probe_types;
			for(; *probe_type; probe_type++) {
				map->mtd = do_map_probe(*probe_type, &map->map);
				if (map->mtd)
					goto found;
			}
		}
		map_top += ROM_PROBE_STEP_SIZE;
		continue;
	found:
		/* Trim the size if we are larger than the map */
		if (map->mtd->size > map->map.size) {
			printk(KERN_WARNING MOD_NAME
				" rom(%llu) larger than window(%lu). fixing...\n",
				(unsigned long long)map->mtd->size, map->map.size);
			map->mtd->size = map->map.size;
		}
		if (window->rsrc.parent) {
			/*
			 * Registering the MTD device in iomem may not be possible
			 * if there is a BIOS "reserved" and BUSY range.  If this
			 * fails then continue anyway.
			 */
			map->rsrc.name  = map->map_name;
			map->rsrc.start = map->map.phys;
			map->rsrc.end   = map->map.phys + map->mtd->size - 1;
			map->rsrc.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
			if (request_resource(&window->rsrc, &map->rsrc)) {
				printk(KERN_ERR MOD_NAME
					": cannot reserve MTD resource\n");
				map->rsrc.parent = NULL;
			}
		}

		/* Make the whole region visible in the map */
		map->map.virt = window->virt;
		map->map.phys = window->phys;
		cfi = map->map.fldrv_priv;
		for(i = 0; i < cfi->numchips; i++) {
			cfi->chips[i].start += offset;
		}

		/* Now that the mtd devices is complete claim and export it */
		map->mtd->owner = THIS_MODULE;
		if (mtd_device_register(map->mtd, NULL, 0)) {
			map_destroy(map->mtd);
			map->mtd = NULL;
			goto out;
		}


		/* Calculate the new value of map_top */
		map_top += map->mtd->size;

		/* File away the map structure */
		list_add(&map->list, &window->maps);
		map = NULL;
	}

 out:
	/* Free any left over map structures */
	kfree(map);

	/* See if I have any map structures */
	if (list_empty(&window->maps)) {
		ichxrom_cleanup(window);
		return -ENODEV;
	}
	return 0;
}


static void ichxrom_remove_one(struct pci_dev *pdev)
{
	struct ichxrom_window *window = &ichxrom_window;
	ichxrom_cleanup(window);
}

static struct pci_device_id ichxrom_pci_tbl[] = {
	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0,
	  PCI_ANY_ID, PCI_ANY_ID, },
	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0,
	  PCI_ANY_ID, PCI_ANY_ID, },
	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0,
	  PCI_ANY_ID, PCI_ANY_ID, },
	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0,
	  PCI_ANY_ID, PCI_ANY_ID, },
	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1,
	  PCI_ANY_ID, PCI_ANY_ID, },
	{ 0, },
};

#if 0
MODULE_DEVICE_TABLE(pci, ichxrom_pci_tbl);

static struct pci_driver ichxrom_driver = {
	.name =		MOD_NAME,
	.id_table =	ichxrom_pci_tbl,
	.probe =	ichxrom_init_one,
	.remove =	ichxrom_remove_one,
};
#endif

static int __init init_ichxrom(void)
{
	struct pci_dev *pdev;
	struct pci_device_id *id;

	pdev = NULL;
	for (id = ichxrom_pci_tbl; id->vendor; id++) {
		pdev = pci_get_device(id->vendor, id->device, NULL);
		if (pdev) {
			break;
		}
	}
	if (pdev) {
		return ichxrom_init_one(pdev, &ichxrom_pci_tbl[0]);
	}
	return -ENXIO;
#if 0
	return pci_register_driver(&ichxrom_driver);
#endif
}

static void __exit cleanup_ichxrom(void)
{
	ichxrom_remove_one(ichxrom_window.pdev);
}

module_init(init_ichxrom);
module_exit(cleanup_ichxrom);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Eric Biederman <ebiederman@lnxi.com>");
MODULE_DESCRIPTION("MTD map driver for BIOS chips on the ICHX southbridge");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* ichxrom.c
	3	*
	4	* Normal mappings of chips in physical memory
1da177e4 LT	5	*/
	6
	7	#include <linux/module.h>
	8	#include <linux/types.h>
	9	#include <linux/kernel.h>
	10	#include <linux/init.h>
5a0e3ad6	11	#include <linux/slab.h>
1da177e4 LT	12	#include <asm/io.h>
	13	#include <linux/mtd/mtd.h>
	14	#include <linux/mtd/map.h>
	15	#include <linux/mtd/cfi.h>
	16	#include <linux/mtd/flashchip.h>
1da177e4 LT	17	#include <linux/pci.h>
	18	#include <linux/pci_ids.h>
	19	#include <linux/list.h>
	20
	21	#define xstr(s) str(s)
	22	#define str(s) #s
	23	#define MOD_NAME xstr(KBUILD_BASENAME)
	24
	25	#define ADDRESS_NAME_LEN 18
	26
	27	#define ROM_PROBE_STEP_SIZE (641024) / 64KiB */
	28
	29	#define BIOS_CNTL 0x4e
	30	#define FWH_DEC_EN1 0xE3
	31	#define FWH_DEC_EN2 0xF0
	32	#define FWH_SEL1 0xE8
	33	#define FWH_SEL2 0xEE
	34
	35	struct ichxrom_window {
	36	void __iomem* virt;
	37	unsigned long phys;
	38	unsigned long size;
	39	struct list_head maps;
	40	struct resource rsrc;
	41	struct pci_dev *pdev;
	42	};
	43
	44	struct ichxrom_map_info {
	45	struct list_head list;
	46	struct map_info map;
	47	struct mtd_info *mtd;
	48	struct resource rsrc;
	49	char map_name[sizeof(MOD_NAME) + 2 + ADDRESS_NAME_LEN];
	50	};
	51
	52	static struct ichxrom_window ichxrom_window = {
	53	.maps = LIST_HEAD_INIT(ichxrom_window.maps),
	54	};
	55
	56	static void ichxrom_cleanup(struct ichxrom_window *window)
	57	{
	58	struct ichxrom_map_info map, scratch;
	59	u16 word;
	60
	61	/* Disable writes through the rom window */
	62	pci_read_config_word(window->pdev, BIOS_CNTL, &word);
	63	pci_write_config_word(window->pdev, BIOS_CNTL, word & ~1);
dd8e9ed6	64	pci_dev_put(window->pdev);
1da177e4 LT	65
	66	/* Free all of the mtd devices */
	67	list_for_each_entry_safe(map, scratch, &window->maps, list) {
	68	if (map->rsrc.parent)
	69	release_resource(&map->rsrc);
ee0e87b1	70	mtd_device_unregister(map->mtd);
1da177e4 LT	71	map_destroy(map->mtd);
	72	list_del(&map->list);
	73	kfree(map);
	74	}
	75	if (window->rsrc.parent)
	76	release_resource(&window->rsrc);
	77	if (window->virt) {
	78	iounmap(window->virt);
	79	window->virt = NULL;
	80	window->phys = 0;
	81	window->size = 0;
	82	window->pdev = NULL;
	83	}
	84	}
	85
	86
7bf350b7 AB	87	static int ichxrom_init_one(struct pci_dev *pdev,
7bf350b7 AB	88	const struct pci_device_id *ent)
1da177e4 LT	89	{
	90	static char *rom_probe_types[] = { "cfi_probe", "jedec_probe", NULL };
	91	struct ichxrom_window *window = &ichxrom_window;
	92	struct ichxrom_map_info *map = NULL;
	93	unsigned long map_top;
	94	u8 byte;
	95	u16 word;
	96
	97	/* For now I just handle the ichx and I assume there
	98	* are not a lot of resources up at the top of the address
	99	* space. It is possible to handle other devices in the
	100	* top 16MB but it is very painful. Also since
	101	* you can only really attach a FWH to an ICHX there
	102	* a number of simplifications you can make.
	103	*
69f34c98	104	* Also you can page firmware hubs if an 8MB window isn't enough
1da177e4 LT	105	* but don't currently handle that case either.
	106	*/
	107	window->pdev = pdev;
	108
	109	/* Find a region continuous to the end of the ROM window */
	110	window->phys = 0;
	111	pci_read_config_byte(pdev, FWH_DEC_EN1, &byte);
	112	if (byte == 0xff) {
	113	window->phys = 0xffc00000;
	114	pci_read_config_byte(pdev, FWH_DEC_EN2, &byte);
	115	if ((byte & 0x0f) == 0x0f) {
	116	window->phys = 0xff400000;
	117	}
	118	else if ((byte & 0x0e) == 0x0e) {
	119	window->phys = 0xff500000;
	120	}
	121	else if ((byte & 0x0c) == 0x0c) {
	122	window->phys = 0xff600000;
	123	}
	124	else if ((byte & 0x08) == 0x08) {
	125	window->phys = 0xff700000;
	126	}
	127	}
	128	else if ((byte & 0xfe) == 0xfe) {
	129	window->phys = 0xffc80000;
	130	}
	131	else if ((byte & 0xfc) == 0xfc) {
	132	window->phys = 0xffd00000;
	133	}
	134	else if ((byte & 0xf8) == 0xf8) {
	135	window->phys = 0xffd80000;
	136	}
	137	else if ((byte & 0xf0) == 0xf0) {
	138	window->phys = 0xffe00000;
	139	}
	140	else if ((byte & 0xe0) == 0xe0) {
	141	window->phys = 0xffe80000;
	142	}
	143	else if ((byte & 0xc0) == 0xc0) {
	144	window->phys = 0xfff00000;
	145	}
	146	else if ((byte & 0x80) == 0x80) {
69f34c98	147	window->phys = 0xfff80000;
1da177e4 LT	148	}
	149
	150	if (window->phys == 0) {
	151	printk(KERN_ERR MOD_NAME ": Rom window is closed\n");
	152	goto out;
	153	}
	154	window->phys -= 0x400000UL;
	155	window->size = (0xffffffffUL - window->phys) + 1UL;
	156
	157	/* Enable writes through the rom window */
	158	pci_read_config_word(pdev, BIOS_CNTL, &word);
	159	if (!(word & 1) && (word & (1<<1))) {
	160	/* The BIOS will generate an error if I enable
	161	* this device, so don't even try.
	162	*/
	163	printk(KERN_ERR MOD_NAME ": firmware access control, I can't enable writes\n");
	164	goto out;
	165	}
	166	pci_write_config_word(pdev, BIOS_CNTL, word \| 1);
	167
	168	/*
	169	* Try to reserve the window mem region. If this fails then
	170	* it is likely due to the window being "reseved" by the BIOS.
	171	*/
	172	window->rsrc.name = MOD_NAME;
	173	window->rsrc.start = window->phys;
	174	window->rsrc.end = window->phys + window->size - 1;
	175	window->rsrc.flags = IORESOURCE_MEM \| IORESOURCE_BUSY;
	176	if (request_resource(&iomem_resource, &window->rsrc)) {
	177	window->rsrc.parent = NULL;
f9a5279c JP	178	printk(KERN_DEBUG MOD_NAME ": "
	179	"%s(): Unable to register resource %pR - kernel bug?\n",
	180	__func__, &window->rsrc);
1da177e4 LT	181	}
	182
	183	/* Map the firmware hub into my address space. */
	184	window->virt = ioremap_nocache(window->phys, window->size);
	185	if (!window->virt) {
	186	printk(KERN_ERR MOD_NAME ": ioremap(%08lx, %08lx) failed\n",
	187	window->phys, window->size);
	188	goto out;
	189	}
	190
	191	/* Get the first address to look for an rom chip at */
	192	map_top = window->phys;
	193	if ((window->phys & 0x3fffff) != 0) {
	194	map_top = window->phys + 0x400000;
	195	}
	196	#if 1
	197	/* The probe sequence run over the firmware hub lock
	198	* registers sets them to 0x7 (no access).
	199	* Probe at most the last 4M of the address space.
	200	*/
	201	if (map_top < 0xffc00000) {
	202	map_top = 0xffc00000;
	203	}
	204	#endif
	205	/* Loop through and look for rom chips */
	206	while((map_top - 1) < 0xffffffffUL) {
	207	struct cfi_private *cfi;
	208	unsigned long offset;
	209	int i;
	210
	211	if (!map) {
	212	map = kmalloc(sizeof(*map), GFP_KERNEL);
	213	}
	214	if (!map) {
	215	printk(KERN_ERR MOD_NAME ": kmalloc failed");
	216	goto out;
	217	}
	218	memset(map, 0, sizeof(*map));
	219	INIT_LIST_HEAD(&map->list);
	220	map->map.name = map->map_name;
	221	map->map.phys = map_top;
	222	offset = map_top - window->phys;
	223	map->map.virt = (void __iomem *)
	224	(((unsigned long)(window->virt)) + offset);
	225	map->map.size = 0xffffffffUL - map_top + 1UL;
	226	/* Set the name of the map to the address I am trying */
3a38d3af AM	227	sprintf(map->map_name, "%s @%08Lx",
3a38d3af AM	228	MOD_NAME, (unsigned long long)map->map.phys);
1da177e4 LT	229
	230	/* Firmware hubs only use vpp when being programmed
	231	* in a factory setting. So in-place programming
	232	* needs to use a different method.
	233	*/
69f34c98	234	for(map->map.bankwidth = 32; map->map.bankwidth;
1da177e4 LT	235	map->map.bankwidth >>= 1)
	236	{
	237	char **probe_type;
	238	/* Skip bankwidths that are not supported */
	239	if (!map_bankwidth_supported(map->map.bankwidth))
	240	continue;
	241
	242	/* Setup the map methods */
	243	simple_map_init(&map->map);
	244
	245	/* Try all of the probe methods */
	246	probe_type = rom_probe_types;
	247	for(; *probe_type; probe_type++) {
	248	map->mtd = do_map_probe(*probe_type, &map->map);
	249	if (map->mtd)
	250	goto found;
	251	}
	252	}
	253	map_top += ROM_PROBE_STEP_SIZE;
	254	continue;
	255	found:
	256	/* Trim the size if we are larger than the map */
	257	if (map->mtd->size > map->map.size) {
	258	printk(KERN_WARNING MOD_NAME
69423d99 AH	259	" rom(%llu) larger than window(%lu). fixing...\n",
69423d99 AH	260	(unsigned long long)map->mtd->size, map->map.size);
1da177e4 LT	261	map->mtd->size = map->map.size;
	262	}
	263	if (window->rsrc.parent) {
	264	/*
	265	* Registering the MTD device in iomem may not be possible
	266	* if there is a BIOS "reserved" and BUSY range. If this
	267	* fails then continue anyway.
	268	*/
	269	map->rsrc.name = map->map_name;
	270	map->rsrc.start = map->map.phys;
	271	map->rsrc.end = map->map.phys + map->mtd->size - 1;
	272	map->rsrc.flags = IORESOURCE_MEM \| IORESOURCE_BUSY;
	273	if (request_resource(&window->rsrc, &map->rsrc)) {
	274	printk(KERN_ERR MOD_NAME
	275	": cannot reserve MTD resource\n");
	276	map->rsrc.parent = NULL;
	277	}
	278	}
	279
	280	/* Make the whole region visible in the map */
	281	map->map.virt = window->virt;
	282	map->map.phys = window->phys;
	283	cfi = map->map.fldrv_priv;
	284	for(i = 0; i < cfi->numchips; i++) {
	285	cfi->chips[i].start += offset;
	286	}
69f34c98	287
1da177e4 LT	288	/* Now that the mtd devices is complete claim and export it */
1da177e4 LT	289	map->mtd->owner = THIS_MODULE;
ee0e87b1	290	if (mtd_device_register(map->mtd, NULL, 0)) {
1da177e4 LT	291	map_destroy(map->mtd);
	292	map->mtd = NULL;
	293	goto out;
	294	}
	295
	296
	297	/* Calculate the new value of map_top */
	298	map_top += map->mtd->size;
	299
	300	/* File away the map structure */
	301	list_add(&map->list, &window->maps);
	302	map = NULL;
	303	}
	304
	305	out:
	306	/* Free any left over map structures */
fa671646 JJ	307	kfree(map);
fa671646 JJ	308
1da177e4 LT	309	/* See if I have any map structures */
	310	if (list_empty(&window->maps)) {
	311	ichxrom_cleanup(window);
	312	return -ENODEV;
	313	}
	314	return 0;
	315	}
	316
	317
7bf350b7	318	static void ichxrom_remove_one(struct pci_dev *pdev)
1da177e4 LT	319	{
	320	struct ichxrom_window *window = &ichxrom_window;
	321	ichxrom_cleanup(window);
	322	}
	323
042a1909	324	static struct pci_device_id ichxrom_pci_tbl[] = {
69f34c98	325	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0,
1da177e4	326	PCI_ANY_ID, PCI_ANY_ID, },
69f34c98	327	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_0,
1da177e4	328	PCI_ANY_ID, PCI_ANY_ID, },
69f34c98	329	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0,
1da177e4 LT	330	PCI_ANY_ID, PCI_ANY_ID, },
	331	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0,
	332	PCI_ANY_ID, PCI_ANY_ID, },
	333	{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_1,
	334	PCI_ANY_ID, PCI_ANY_ID, },
	335	{ 0, },
	336	};
	337
b9c86d59	338	#if 0
1da177e4 LT	339	MODULE_DEVICE_TABLE(pci, ichxrom_pci_tbl);
1da177e4 LT	340
1da177e4 LT	341	static struct pci_driver ichxrom_driver = {
	342	.name = MOD_NAME,
	343	.id_table = ichxrom_pci_tbl,
	344	.probe = ichxrom_init_one,
	345	.remove = ichxrom_remove_one,
	346	};
	347	#endif
	348
	349	static int __init init_ichxrom(void)
	350	{
	351	struct pci_dev *pdev;
	352	struct pci_device_id *id;
	353
	354	pdev = NULL;
	355	for (id = ichxrom_pci_tbl; id->vendor; id++) {
dd8e9ed6	356	pdev = pci_get_device(id->vendor, id->device, NULL);
1da177e4 LT	357	if (pdev) {
	358	break;
	359	}
	360	}
	361	if (pdev) {
	362	return ichxrom_init_one(pdev, &ichxrom_pci_tbl[0]);
	363	}
	364	return -ENXIO;
	365	#if 0
ff3bc4eb	366	return pci_register_driver(&ichxrom_driver);
1da177e4 LT	367	#endif
	368	}
	369
	370	static void __exit cleanup_ichxrom(void)
	371	{
	372	ichxrom_remove_one(ichxrom_window.pdev);
	373	}
	374
	375	module_init(init_ichxrom);
	376	module_exit(cleanup_ichxrom);
	377
	378	MODULE_LICENSE("GPL");
	379	MODULE_AUTHOR("Eric Biederman <ebiederman@lnxi.com>");
	380	MODULE_DESCRIPTION("MTD map driver for BIOS chips on the ICHX southbridge");