[linux-2.6-block.git] / drivers / eisa / eisa-bus.c

/*
 * EISA bus support functions for sysfs.
 *
 * (C) 2002, 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
 *
 * This code is released under the GPL version 2.
 */

#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/eisa.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <asm/io.h>

#define SLOT_ADDRESS(r,n) (r->bus_base_addr + (0x1000 * n))

#define EISA_DEVINFO(i,s) { .id = { .sig = i }, .name = s }

struct eisa_device_info {
	struct eisa_device_id id;
	char name[50];
};

#ifdef CONFIG_EISA_NAMES
static struct eisa_device_info __initdata eisa_table[] = {
#include "devlist.h"
};
#define EISA_INFOS (sizeof (eisa_table) / (sizeof (struct eisa_device_info)))
#endif

#define EISA_MAX_FORCED_DEV 16

static int enable_dev[EISA_MAX_FORCED_DEV];
static unsigned int enable_dev_count;
static int disable_dev[EISA_MAX_FORCED_DEV];
static unsigned int disable_dev_count;

static int is_forced_dev(int *forced_tab,
			 int forced_count,
			 struct eisa_root_device *root,
			 struct eisa_device *edev)
{
	int i, x;

	for (i = 0; i < forced_count; i++) {
		x = (root->bus_nr << 8) | edev->slot;
		if (forced_tab[i] == x)
			return 1;
	}

	return 0;
}

static void __init eisa_name_device(struct eisa_device *edev)
{
#ifdef CONFIG_EISA_NAMES
	int i;
	for (i = 0; i < EISA_INFOS; i++) {
		if (!strcmp(edev->id.sig, eisa_table[i].id.sig)) {
			strlcpy(edev->pretty_name,
				eisa_table[i].name,
				sizeof(edev->pretty_name));
			return;
		}
	}

	/* No name was found */
	sprintf(edev->pretty_name, "EISA device %.7s", edev->id.sig);
#endif
}

static char __init *decode_eisa_sig(unsigned long addr)
{
        static char sig_str[EISA_SIG_LEN];
	u8 sig[4];
        u16 rev;
	int i;

	for (i = 0; i < 4; i++) {
#ifdef CONFIG_EISA_VLB_PRIMING
		/*
		 * This ugly stuff is used to wake up VL-bus cards
		 * (AHA-284x is the only known example), so we can
		 * read the EISA id.
		 *
		 * Thankfully, this only exists on x86...
		 */
		outb(0x80 + i, addr);
#endif
		sig[i] = inb(addr + i);

		if (!i && (sig[0] & 0x80))
			return NULL;
	}
	
        sig_str[0] = ((sig[0] >> 2) & 0x1f) + ('A' - 1);
        sig_str[1] = (((sig[0] & 3) << 3) | (sig[1] >> 5)) + ('A' - 1);
        sig_str[2] = (sig[1] & 0x1f) + ('A' - 1);
        rev = (sig[2] << 8) | sig[3];
        sprintf(sig_str + 3, "%04X", rev);

        return sig_str;
}

static int eisa_bus_match(struct device *dev, struct device_driver *drv)
{
	struct eisa_device *edev = to_eisa_device(dev);
	struct eisa_driver *edrv = to_eisa_driver(drv);
	const struct eisa_device_id *eids = edrv->id_table;

	if (!eids)
		return 0;

	while (strlen(eids->sig)) {
		if (!strcmp(eids->sig, edev->id.sig) &&
		    edev->state & EISA_CONFIG_ENABLED) {
			edev->id.driver_data = eids->driver_data;
			return 1;
		}

		eids++;
	}

	return 0;
}

static int eisa_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
{
	struct eisa_device *edev = to_eisa_device(dev);

	add_uevent_var(env, "MODALIAS=" EISA_DEVICE_MODALIAS_FMT, edev->id.sig);
	return 0;
}

struct bus_type eisa_bus_type = {
	.name  = "eisa",
	.match = eisa_bus_match,
	.uevent = eisa_bus_uevent,
};
EXPORT_SYMBOL(eisa_bus_type);

int eisa_driver_register(struct eisa_driver *edrv)
{
	edrv->driver.bus = &eisa_bus_type;
	return driver_register(&edrv->driver);
}
EXPORT_SYMBOL(eisa_driver_register);

void eisa_driver_unregister(struct eisa_driver *edrv)
{
	driver_unregister(&edrv->driver);
}
EXPORT_SYMBOL(eisa_driver_unregister);

static ssize_t eisa_show_sig(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	struct eisa_device *edev = to_eisa_device(dev);
	return sprintf(buf, "%s\n", edev->id.sig);
}

static DEVICE_ATTR(signature, S_IRUGO, eisa_show_sig, NULL);

static ssize_t eisa_show_state(struct device *dev,
			       struct device_attribute *attr,
			       char *buf)
{
	struct eisa_device *edev = to_eisa_device(dev);
	return sprintf(buf, "%d\n", edev->state & EISA_CONFIG_ENABLED);
}

static DEVICE_ATTR(enabled, S_IRUGO, eisa_show_state, NULL);

static ssize_t eisa_show_modalias(struct device *dev,
				  struct device_attribute *attr,
				  char *buf)
{
	struct eisa_device *edev = to_eisa_device(dev);
	return sprintf(buf, EISA_DEVICE_MODALIAS_FMT "\n", edev->id.sig);
}

static DEVICE_ATTR(modalias, S_IRUGO, eisa_show_modalias, NULL);

static int __init eisa_init_device(struct eisa_root_device *root,
				   struct eisa_device *edev,
				   int slot)
{
	char *sig;
	unsigned long sig_addr;
	int i;

	sig_addr = SLOT_ADDRESS(root, slot) + EISA_VENDOR_ID_OFFSET;

	sig = decode_eisa_sig(sig_addr);
	if (!sig)
		return -1;	/* No EISA device here */
	
	memcpy(edev->id.sig, sig, EISA_SIG_LEN);
	edev->slot = slot;
	edev->state = inb(SLOT_ADDRESS(root, slot) + EISA_CONFIG_OFFSET)
		      & EISA_CONFIG_ENABLED;
	edev->base_addr = SLOT_ADDRESS(root, slot);
	edev->dma_mask = root->dma_mask; /* Default DMA mask */
	eisa_name_device(edev);
	edev->dev.parent = root->dev;
	edev->dev.bus = &eisa_bus_type;
	edev->dev.dma_mask = &edev->dma_mask;
	edev->dev.coherent_dma_mask = edev->dma_mask;
	dev_set_name(&edev->dev, "%02X:%02X", root->bus_nr, slot);

	for (i = 0; i < EISA_MAX_RESOURCES; i++) {
#ifdef CONFIG_EISA_NAMES
		edev->res[i].name = edev->pretty_name;
#else
		edev->res[i].name = edev->id.sig;
#endif
	}

	if (is_forced_dev(enable_dev, enable_dev_count, root, edev))
		edev->state = EISA_CONFIG_ENABLED | EISA_CONFIG_FORCED;
	
	if (is_forced_dev(disable_dev, disable_dev_count, root, edev))
		edev->state = EISA_CONFIG_FORCED;

	return 0;
}

static int __init eisa_register_device(struct eisa_device *edev)
{
	int rc = device_register(&edev->dev);
	if (rc) {
		put_device(&edev->dev);
		return rc;
	}

	rc = device_create_file(&edev->dev, &dev_attr_signature);
	if (rc)
		goto err_devreg;
	rc = device_create_file(&edev->dev, &dev_attr_enabled);
	if (rc)
		goto err_sig;
	rc = device_create_file(&edev->dev, &dev_attr_modalias);
	if (rc)
		goto err_enab;

	return 0;

err_enab:
	device_remove_file(&edev->dev, &dev_attr_enabled);
err_sig:
	device_remove_file(&edev->dev, &dev_attr_signature);
err_devreg:
	device_unregister(&edev->dev);
	return rc;
}

static int __init eisa_request_resources(struct eisa_root_device *root,
					 struct eisa_device *edev,
					 int slot)
{
	int i;

	for (i = 0; i < EISA_MAX_RESOURCES; i++) {
		/* Don't register resource for slot 0, since this is
		 * very likely to fail... :-( Instead, grab the EISA
		 * id, now we can display something in /proc/ioports.
		 */

		/* Only one region for mainboard */
		if (!slot && i > 0) {
			edev->res[i].start = edev->res[i].end = 0;
			continue;
		}
		
		if (slot) {
			edev->res[i].name  = NULL;
			edev->res[i].start = SLOT_ADDRESS(root, slot)
					     + (i * 0x400);
			edev->res[i].end   = edev->res[i].start + 0xff;
			edev->res[i].flags = IORESOURCE_IO;
		} else {
			edev->res[i].name  = NULL;
			edev->res[i].start = SLOT_ADDRESS(root, slot)
					     + EISA_VENDOR_ID_OFFSET;
			edev->res[i].end   = edev->res[i].start + 3;
			edev->res[i].flags = IORESOURCE_IO | IORESOURCE_BUSY;
		}

		if (request_resource(root->res, &edev->res[i]))
			goto failed;
	}

	return 0;
	
 failed:
	while (--i >= 0)
		release_resource(&edev->res[i]);

	return -1;
}

static void __init eisa_release_resources(struct eisa_device *edev)
{
	int i;

	for (i = 0; i < EISA_MAX_RESOURCES; i++)
		if (edev->res[i].start || edev->res[i].end)
			release_resource(&edev->res[i]);
}

static int __init eisa_probe(struct eisa_root_device *root)
{
        int i, c;
	struct eisa_device *edev;
	char *enabled_str;

	dev_info(root->dev, "Probing EISA bus %d\n", root->bus_nr);

	/* First try to get hold of slot 0. If there is no device
	 * here, simply fail, unless root->force_probe is set. */
	
	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
	if (!edev) {
		dev_err(root->dev, "EISA: Couldn't allocate mainboard slot\n");
		return -ENOMEM;
	}
		
	if (eisa_request_resources(root, edev, 0)) {
		dev_warn(root->dev,
		         "EISA: Cannot allocate resource for mainboard\n");
		kfree(edev);
		if (!root->force_probe)
			return -EBUSY;
		goto force_probe;
	}

	if (eisa_init_device(root, edev, 0)) {
		eisa_release_resources(edev);
		kfree(edev);
		if (!root->force_probe)
			return -ENODEV;
		goto force_probe;
	}

	dev_info(&edev->dev, "EISA: Mainboard %s detected\n", edev->id.sig);

	if (eisa_register_device(edev)) {
		dev_err(&edev->dev, "EISA: Failed to register %s\n",
		        edev->id.sig);
		eisa_release_resources(edev);
		kfree(edev);
	}
	
 force_probe:
	
        for (c = 0, i = 1; i <= root->slots; i++) {
		edev = kzalloc(sizeof(*edev), GFP_KERNEL);
		if (!edev) {
			dev_err(root->dev, "EISA: Out of memory for slot %d\n",
				i);
			continue;
		}

		if (eisa_request_resources(root, edev, i)) {
			dev_warn(root->dev,
			         "Cannot allocate resource for EISA slot %d\n",
			         i);
			kfree(edev);
			continue;
		}

		if (eisa_init_device(root, edev, i)) {
			eisa_release_resources(edev);
			kfree(edev);
			continue;
		}

		if (edev->state == (EISA_CONFIG_ENABLED | EISA_CONFIG_FORCED))
			enabled_str = " (forced enabled)";
		else if (edev->state == EISA_CONFIG_FORCED)
			enabled_str = " (forced disabled)";
		else if (edev->state == 0)
			enabled_str = " (disabled)";
		else
			enabled_str = "";

		dev_info(&edev->dev, "EISA: slot %d: %s detected%s\n", i,
			 edev->id.sig, enabled_str);

		c++;

		if (eisa_register_device(edev)) {
			dev_err(&edev->dev, "EISA: Failed to register %s\n",
			        edev->id.sig);
			eisa_release_resources(edev);
			kfree(edev);
		}
        }

	dev_info(root->dev, "EISA: Detected %d card%s\n", c, c == 1 ? "" : "s");
	return 0;
}

static struct resource eisa_root_res = {
	.name  = "EISA root resource",
	.start = 0,
	.end   = 0xffffffff,
	.flags = IORESOURCE_IO,
};

static int eisa_bus_count;

int __init eisa_root_register(struct eisa_root_device *root)
{
	int err;

	/* Use our own resources to check if this bus base address has
	 * been already registered. This prevents the virtual root
	 * device from registering after the real one has, for
	 * example... */
	
	root->eisa_root_res.name  = eisa_root_res.name;
	root->eisa_root_res.start = root->res->start;
	root->eisa_root_res.end   = root->res->end;
	root->eisa_root_res.flags = IORESOURCE_BUSY;

	err = request_resource(&eisa_root_res, &root->eisa_root_res);
	if (err)
		return err;
	
	root->bus_nr = eisa_bus_count++;

	err = eisa_probe(root);
	if (err)
		release_resource(&root->eisa_root_res);

	return err;
}

static int __init eisa_init(void)
{
	int r;
	
	r = bus_register(&eisa_bus_type);
	if (r)
		return r;

	printk(KERN_INFO "EISA bus registered\n");
	return 0;
}

module_param_array(enable_dev, int, &enable_dev_count, 0444);
module_param_array(disable_dev, int, &disable_dev_count, 0444);

postcore_initcall(eisa_init);

int EISA_bus;		/* for legacy drivers */
EXPORT_SYMBOL(EISA_bus);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* EISA bus support functions for sysfs.
	3	*
	4	* (C) 2002, 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
	5	*
	6	* This code is released under the GPL version 2.
	7	*/
	8
	9	#include <linux/kernel.h>
	10	#include <linux/device.h>
	11	#include <linux/eisa.h>
	12	#include <linux/module.h>
	13	#include <linux/moduleparam.h>
	14	#include <linux/init.h>
	15	#include <linux/slab.h>
	16	#include <linux/ioport.h>
	17	#include <asm/io.h>
	18
	19	#define SLOT_ADDRESS(r,n) (r->bus_base_addr + (0x1000 * n))
	20
	21	#define EISA_DEVINFO(i,s) { .id = { .sig = i }, .name = s }
	22
	23	struct eisa_device_info {
	24	struct eisa_device_id id;
ca52a498	25	char name[50];
1da177e4 LT	26	};
	27
	28	#ifdef CONFIG_EISA_NAMES
	29	static struct eisa_device_info __initdata eisa_table[] = {
	30	#include "devlist.h"
	31	};
	32	#define EISA_INFOS (sizeof (eisa_table) / (sizeof (struct eisa_device_info)))
	33	#endif
	34
	35	#define EISA_MAX_FORCED_DEV 16
	36
	37	static int enable_dev[EISA_MAX_FORCED_DEV];
64a6f950	38	static unsigned int enable_dev_count;
1da177e4	39	static int disable_dev[EISA_MAX_FORCED_DEV];
64a6f950	40	static unsigned int disable_dev_count;
1da177e4	41
33fd797b TLSC	42	static int is_forced_dev(int *forced_tab,
	43	int forced_count,
	44	struct eisa_root_device *root,
	45	struct eisa_device *edev)
1da177e4 LT	46	{
	47	int i, x;
	48
	49	for (i = 0; i < forced_count; i++) {
	50	x = (root->bus_nr << 8) \| edev->slot;
	51	if (forced_tab[i] == x)
	52	return 1;
	53	}
	54
	55	return 0;
	56	}
	57
33fd797b	58	static void __init eisa_name_device(struct eisa_device *edev)
1da177e4 LT	59	{
	60	#ifdef CONFIG_EISA_NAMES
	61	int i;
	62	for (i = 0; i < EISA_INFOS; i++) {
33fd797b TLSC	63	if (!strcmp(edev->id.sig, eisa_table[i].id.sig)) {
	64	strlcpy(edev->pretty_name,
	65	eisa_table[i].name,
	66	sizeof(edev->pretty_name));
1da177e4 LT	67	return;
	68	}
	69	}
	70
	71	/* No name was found */
33fd797b	72	sprintf(edev->pretty_name, "EISA device %.7s", edev->id.sig);
1da177e4 LT	73	#endif
	74	}
	75
	76	static char __init *decode_eisa_sig(unsigned long addr)
	77	{
	78	static char sig_str[EISA_SIG_LEN];
	79	u8 sig[4];
	80	u16 rev;
	81	int i;
	82
	83	for (i = 0; i < 4; i++) {
	84	#ifdef CONFIG_EISA_VLB_PRIMING
	85	/*
	86	* This ugly stuff is used to wake up VL-bus cards
	87	* (AHA-284x is the only known example), so we can
	88	* read the EISA id.
	89	*
	90	* Thankfully, this only exists on x86...
	91	*/
	92	outb(0x80 + i, addr);
	93	#endif
33fd797b	94	sig[i] = inb(addr + i);
1da177e4 LT	95
	96	if (!i && (sig[0] & 0x80))
	97	return NULL;
	98	}
	99
	100	sig_str[0] = ((sig[0] >> 2) & 0x1f) + ('A' - 1);
	101	sig_str[1] = (((sig[0] & 3) << 3) \| (sig[1] >> 5)) + ('A' - 1);
	102	sig_str[2] = (sig[1] & 0x1f) + ('A' - 1);
	103	rev = (sig[2] << 8) \| sig[3];
	104	sprintf(sig_str + 3, "%04X", rev);
	105
	106	return sig_str;
	107	}
	108
33fd797b	109	static int eisa_bus_match(struct device dev, struct device_driver drv)
1da177e4	110	{
33fd797b TLSC	111	struct eisa_device *edev = to_eisa_device(dev);
33fd797b TLSC	112	struct eisa_driver *edrv = to_eisa_driver(drv);
1da177e4 LT	113	const struct eisa_device_id *eids = edrv->id_table;
	114
	115	if (!eids)
	116	return 0;
	117
33fd797b TLSC	118	while (strlen(eids->sig)) {
33fd797b TLSC	119	if (!strcmp(eids->sig, edev->id.sig) &&
1da177e4 LT	120	edev->state & EISA_CONFIG_ENABLED) {
	121	edev->id.driver_data = eids->driver_data;
	122	return 1;
	123	}
	124
	125	eids++;
	126	}
	127
	128	return 0;
	129	}
	130
7eff2e7a	131	static int eisa_bus_uevent(struct device dev, struct kobj_uevent_env env)
07563c71 MT	132	{
07563c71 MT	133	struct eisa_device *edev = to_eisa_device(dev);
07563c71	134
7eff2e7a	135	add_uevent_var(env, "MODALIAS=" EISA_DEVICE_MODALIAS_FMT, edev->id.sig);
07563c71 MT	136	return 0;
	137	}
	138
1da177e4 LT	139	struct bus_type eisa_bus_type = {
	140	.name = "eisa",
	141	.match = eisa_bus_match,
07563c71	142	.uevent = eisa_bus_uevent,
1da177e4	143	};
33fd797b	144	EXPORT_SYMBOL(eisa_bus_type);
1da177e4	145
33fd797b	146	int eisa_driver_register(struct eisa_driver *edrv)
1da177e4	147	{
1da177e4	148	edrv->driver.bus = &eisa_bus_type;
33fd797b	149	return driver_register(&edrv->driver);
1da177e4	150	}
33fd797b	151	EXPORT_SYMBOL(eisa_driver_register);
1da177e4	152
33fd797b	153	void eisa_driver_unregister(struct eisa_driver *edrv)
1da177e4	154	{
33fd797b	155	driver_unregister(&edrv->driver);
1da177e4	156	}
33fd797b	157	EXPORT_SYMBOL(eisa_driver_unregister);
1da177e4	158
33fd797b TLSC	159	static ssize_t eisa_show_sig(struct device dev, struct device_attribute attr,
33fd797b TLSC	160	char *buf)
1da177e4	161	{
33fd797b TLSC	162	struct eisa_device *edev = to_eisa_device(dev);
33fd797b TLSC	163	return sprintf(buf, "%s\n", edev->id.sig);
1da177e4 LT	164	}
	165
	166	static DEVICE_ATTR(signature, S_IRUGO, eisa_show_sig, NULL);
	167
33fd797b TLSC	168	static ssize_t eisa_show_state(struct device *dev,
	169	struct device_attribute *attr,
	170	char *buf)
1da177e4	171	{
33fd797b TLSC	172	struct eisa_device *edev = to_eisa_device(dev);
33fd797b TLSC	173	return sprintf(buf, "%d\n", edev->state & EISA_CONFIG_ENABLED);
1da177e4 LT	174	}
	175
	176	static DEVICE_ATTR(enabled, S_IRUGO, eisa_show_state, NULL);
	177
33fd797b TLSC	178	static ssize_t eisa_show_modalias(struct device *dev,
	179	struct device_attribute *attr,
	180	char *buf)
07563c71	181	{
33fd797b TLSC	182	struct eisa_device *edev = to_eisa_device(dev);
33fd797b TLSC	183	return sprintf(buf, EISA_DEVICE_MODALIAS_FMT "\n", edev->id.sig);
07563c71 MT	184	}
	185
	186	static DEVICE_ATTR(modalias, S_IRUGO, eisa_show_modalias, NULL);
	187
33fd797b TLSC	188	static int __init eisa_init_device(struct eisa_root_device *root,
	189	struct eisa_device *edev,
	190	int slot)
1da177e4 LT	191	{
1da177e4 LT	192	char *sig;
33fd797b	193	unsigned long sig_addr;
1da177e4 LT	194	int i;
1da177e4 LT	195
33fd797b	196	sig_addr = SLOT_ADDRESS(root, slot) + EISA_VENDOR_ID_OFFSET;
1da177e4	197
33fd797b TLSC	198	sig = decode_eisa_sig(sig_addr);
33fd797b TLSC	199	if (!sig)
1da177e4 LT	200	return -1; /* No EISA device here */
1da177e4 LT	201
33fd797b	202	memcpy(edev->id.sig, sig, EISA_SIG_LEN);
1da177e4	203	edev->slot = slot;
33fd797b TLSC	204	edev->state = inb(SLOT_ADDRESS(root, slot) + EISA_CONFIG_OFFSET)
	205	& EISA_CONFIG_ENABLED;
	206	edev->base_addr = SLOT_ADDRESS(root, slot);
1da177e4	207	edev->dma_mask = root->dma_mask; /* Default DMA mask */
33fd797b	208	eisa_name_device(edev);
1da177e4 LT	209	edev->dev.parent = root->dev;
	210	edev->dev.bus = &eisa_bus_type;
	211	edev->dev.dma_mask = &edev->dma_mask;
	212	edev->dev.coherent_dma_mask = edev->dma_mask;
e537b245	213	dev_set_name(&edev->dev, "%02X:%02X", root->bus_nr, slot);
1da177e4 LT	214
	215	for (i = 0; i < EISA_MAX_RESOURCES; i++) {
	216	#ifdef CONFIG_EISA_NAMES
	217	edev->res[i].name = edev->pretty_name;
	218	#else
	219	edev->res[i].name = edev->id.sig;
	220	#endif
	221	}
	222
33fd797b	223	if (is_forced_dev(enable_dev, enable_dev_count, root, edev))
1da177e4 LT	224	edev->state = EISA_CONFIG_ENABLED \| EISA_CONFIG_FORCED;
1da177e4 LT	225
33fd797b	226	if (is_forced_dev(disable_dev, disable_dev_count, root, edev))
1da177e4 LT	227	edev->state = EISA_CONFIG_FORCED;
	228
	229	return 0;
	230	}
	231
33fd797b	232	static int __init eisa_register_device(struct eisa_device *edev)
1da177e4	233	{
33fd797b	234	int rc = device_register(&edev->dev);
04df008a LK	235	if (rc) {
04df008a LK	236	put_device(&edev->dev);
42ddfd68	237	return rc;
04df008a	238	}
1da177e4	239
33fd797b TLSC	240	rc = device_create_file(&edev->dev, &dev_attr_signature);
	241	if (rc)
	242	goto err_devreg;
	243	rc = device_create_file(&edev->dev, &dev_attr_enabled);
	244	if (rc)
	245	goto err_sig;
	246	rc = device_create_file(&edev->dev, &dev_attr_modalias);
	247	if (rc)
	248	goto err_enab;
1da177e4 LT	249
1da177e4 LT	250	return 0;
42ddfd68 JG	251
42ddfd68 JG	252	err_enab:
33fd797b	253	device_remove_file(&edev->dev, &dev_attr_enabled);
42ddfd68	254	err_sig:
33fd797b	255	device_remove_file(&edev->dev, &dev_attr_signature);
42ddfd68 JG	256	err_devreg:
	257	device_unregister(&edev->dev);
	258	return rc;
1da177e4 LT	259	}
1da177e4 LT	260
33fd797b TLSC	261	static int __init eisa_request_resources(struct eisa_root_device *root,
	262	struct eisa_device *edev,
	263	int slot)
1da177e4 LT	264	{
	265	int i;
	266
	267	for (i = 0; i < EISA_MAX_RESOURCES; i++) {
	268	/* Don't register resource for slot 0, since this is
	269	* very likely to fail... :-( Instead, grab the EISA
	270	* id, now we can display something in /proc/ioports.
	271	*/
	272
	273	/* Only one region for mainboard */
	274	if (!slot && i > 0) {
	275	edev->res[i].start = edev->res[i].end = 0;
	276	continue;
	277	}
	278
	279	if (slot) {
765ee51f	280	edev->res[i].name = NULL;
33fd797b TLSC	281	edev->res[i].start = SLOT_ADDRESS(root, slot)
33fd797b TLSC	282	+ (i * 0x400);
1da177e4 LT	283	edev->res[i].end = edev->res[i].start + 0xff;
	284	edev->res[i].flags = IORESOURCE_IO;
	285	} else {
765ee51f	286	edev->res[i].name = NULL;
33fd797b TLSC	287	edev->res[i].start = SLOT_ADDRESS(root, slot)
33fd797b TLSC	288	+ EISA_VENDOR_ID_OFFSET;
1da177e4	289	edev->res[i].end = edev->res[i].start + 3;
76668257	290	edev->res[i].flags = IORESOURCE_IO \| IORESOURCE_BUSY;
1da177e4 LT	291	}
1da177e4 LT	292
33fd797b	293	if (request_resource(root->res, &edev->res[i]))
1da177e4 LT	294	goto failed;
	295	}
	296
	297	return 0;
	298
	299	failed:
	300	while (--i >= 0)
33fd797b	301	release_resource(&edev->res[i]);
1da177e4 LT	302
	303	return -1;
	304	}
	305
33fd797b	306	static void __init eisa_release_resources(struct eisa_device *edev)
1da177e4 LT	307	{
	308	int i;
	309
	310	for (i = 0; i < EISA_MAX_RESOURCES; i++)
	311	if (edev->res[i].start \|\| edev->res[i].end)
33fd797b	312	release_resource(&edev->res[i]);
1da177e4 LT	313	}
1da177e4 LT	314
33fd797b	315	static int __init eisa_probe(struct eisa_root_device *root)
1da177e4 LT	316	{
	317	int i, c;
	318	struct eisa_device *edev;
4cf9f24d	319	char *enabled_str;
1da177e4	320
4cf9f24d	321	dev_info(root->dev, "Probing EISA bus %d\n", root->bus_nr);
1da177e4 LT	322
	323	/* First try to get hold of slot 0. If there is no device
	324	* here, simply fail, unless root->force_probe is set. */
	325
33fd797b TLSC	326	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
33fd797b TLSC	327	if (!edev) {
4cf9f24d	328	dev_err(root->dev, "EISA: Couldn't allocate mainboard slot\n");
1da177e4 LT	329	return -ENOMEM;
	330	}
	331
765ee51f BH	332	if (eisa_request_resources(root, edev, 0)) {
	333	dev_warn(root->dev,
	334	"EISA: Cannot allocate resource for mainboard\n");
33fd797b	335	kfree(edev);
1da177e4	336	if (!root->force_probe)
765ee51f	337	return -EBUSY;
1da177e4 LT	338	goto force_probe;
	339	}
	340
765ee51f BH	341	if (eisa_init_device(root, edev, 0)) {
765ee51f BH	342	eisa_release_resources(edev);
33fd797b	343	kfree(edev);
1da177e4	344	if (!root->force_probe)
765ee51f	345	return -ENODEV;
1da177e4 LT	346	goto force_probe;
	347	}
	348
4cf9f24d	349	dev_info(&edev->dev, "EISA: Mainboard %s detected\n", edev->id.sig);
1da177e4	350
33fd797b	351	if (eisa_register_device(edev)) {
4cf9f24d BH	352	dev_err(&edev->dev, "EISA: Failed to register %s\n",
4cf9f24d BH	353	edev->id.sig);
33fd797b TLSC	354	eisa_release_resources(edev);
33fd797b TLSC	355	kfree(edev);
1da177e4 LT	356	}
	357
	358	force_probe:
	359
	360	for (c = 0, i = 1; i <= root->slots; i++) {
33fd797b TLSC	361	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
33fd797b TLSC	362	if (!edev) {
4cf9f24d BH	363	dev_err(root->dev, "EISA: Out of memory for slot %d\n",
4cf9f24d BH	364	i);
1da177e4 LT	365	continue;
1da177e4 LT	366	}
1da177e4	367
26abfeed BH	368	if (eisa_request_resources(root, edev, i)) {
	369	dev_warn(root->dev,
	370	"Cannot allocate resource for EISA slot %d\n",
	371	i);
33fd797b	372	kfree(edev);
1da177e4 LT	373	continue;
1da177e4 LT	374	}
4cf9f24d	375
765ee51f BH	376	if (eisa_init_device(root, edev, i)) {
	377	eisa_release_resources(edev);
	378	kfree(edev);
	379	continue;
	380	}
	381
4cf9f24d BH	382	if (edev->state == (EISA_CONFIG_ENABLED \| EISA_CONFIG_FORCED))
	383	enabled_str = " (forced enabled)";
	384	else if (edev->state == EISA_CONFIG_FORCED)
	385	enabled_str = " (forced disabled)";
	386	else if (edev->state == 0)
	387	enabled_str = " (disabled)";
	388	else
	389	enabled_str = "";
	390
	391	dev_info(&edev->dev, "EISA: slot %d: %s detected%s\n", i,
	392	edev->id.sig, enabled_str);
1da177e4 LT	393
	394	c++;
	395
33fd797b	396	if (eisa_register_device(edev)) {
4cf9f24d BH	397	dev_err(&edev->dev, "EISA: Failed to register %s\n",
4cf9f24d BH	398	edev->id.sig);
33fd797b TLSC	399	eisa_release_resources(edev);
33fd797b TLSC	400	kfree(edev);
1da177e4 LT	401	}
	402	}
	403
4cf9f24d	404	dev_info(root->dev, "EISA: Detected %d card%s\n", c, c == 1 ? "" : "s");
1da177e4 LT	405	return 0;
	406	}
	407
	408	static struct resource eisa_root_res = {
	409	.name = "EISA root resource",
	410	.start = 0,
	411	.end = 0xffffffff,
	412	.flags = IORESOURCE_IO,
	413	};
	414
	415	static int eisa_bus_count;
	416
33fd797b	417	int __init eisa_root_register(struct eisa_root_device *root)
1da177e4 LT	418	{
	419	int err;
	420
	421	/* Use our own resources to check if this bus base address has
	422	* been already registered. This prevents the virtual root
	423	* device from registering after the real one has, for
	424	* example... */
	425
	426	root->eisa_root_res.name = eisa_root_res.name;
	427	root->eisa_root_res.start = root->res->start;
	428	root->eisa_root_res.end = root->res->end;
	429	root->eisa_root_res.flags = IORESOURCE_BUSY;
	430
33fd797b TLSC	431	err = request_resource(&eisa_root_res, &root->eisa_root_res);
33fd797b TLSC	432	if (err)
1da177e4 LT	433	return err;
	434
	435	root->bus_nr = eisa_bus_count++;
	436
33fd797b TLSC	437	err = eisa_probe(root);
	438	if (err)
	439	release_resource(&root->eisa_root_res);
1da177e4 LT	440
	441	return err;
	442	}
	443
33fd797b	444	static int __init eisa_init(void)
1da177e4 LT	445	{
	446	int r;
	447
33fd797b TLSC	448	r = bus_register(&eisa_bus_type);
33fd797b TLSC	449	if (r)
1da177e4 LT	450	return r;
1da177e4 LT	451
33fd797b	452	printk(KERN_INFO "EISA bus registered\n");
1da177e4 LT	453	return 0;
	454	}
	455
	456	module_param_array(enable_dev, int, &enable_dev_count, 0444);
	457	module_param_array(disable_dev, int, &disable_dev_count, 0444);
	458
33fd797b	459	postcore_initcall(eisa_init);
1da177e4 LT	460
1da177e4 LT	461	int EISA_bus; /* for legacy drivers */
33fd797b	462	EXPORT_SYMBOL(EISA_bus);