[net-next-2.6.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)
		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_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;

	printk(KERN_INFO "EISA: Probing bus %d at %s\n",
	       root->bus_nr, dev_name(root->dev));

	/* 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) {
		printk(KERN_ERR "EISA: Couldn't allocate mainboard slot\n");
		return -ENOMEM;
	}
		
	if (eisa_request_resources(root, edev, 0)) {
		printk(KERN_WARNING \
		       "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;
	}

	printk(KERN_INFO "EISA: Mainboard %s detected.\n", edev->id.sig);

	if (eisa_register_device(edev)) {
		printk(KERN_ERR "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) {
			printk(KERN_ERR "EISA: Out of memory for slot %d\n", i);
			continue;
		}

		if (eisa_request_resources(root, edev, i)) {
			printk(KERN_WARNING \
			       "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;
		}
		
		printk(KERN_INFO "EISA: slot %d : %s detected",
		       i, edev->id.sig);
			
		switch (edev->state) {
		case EISA_CONFIG_ENABLED | EISA_CONFIG_FORCED:
			printk(" (forced enabled)");
			break;

		case EISA_CONFIG_FORCED:
			printk(" (forced disabled)");
			break;

		case 0:
			printk(" (disabled)");
			break;
		}
			
		printk (".\n");

		c++;

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

	printk(KERN_INFO "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);
42ddfd68 JG	235	if (rc)
42ddfd68 JG	236	return rc;
1da177e4	237
33fd797b TLSC	238	rc = device_create_file(&edev->dev, &dev_attr_signature);
	239	if (rc)
	240	goto err_devreg;
	241	rc = device_create_file(&edev->dev, &dev_attr_enabled);
	242	if (rc)
	243	goto err_sig;
	244	rc = device_create_file(&edev->dev, &dev_attr_modalias);
	245	if (rc)
	246	goto err_enab;
1da177e4 LT	247
1da177e4 LT	248	return 0;
42ddfd68 JG	249
42ddfd68 JG	250	err_enab:
33fd797b	251	device_remove_file(&edev->dev, &dev_attr_enabled);
42ddfd68	252	err_sig:
33fd797b	253	device_remove_file(&edev->dev, &dev_attr_signature);
42ddfd68 JG	254	err_devreg:
	255	device_unregister(&edev->dev);
	256	return rc;
1da177e4 LT	257	}
1da177e4 LT	258
33fd797b TLSC	259	static int __init eisa_request_resources(struct eisa_root_device *root,
	260	struct eisa_device *edev,
	261	int slot)
1da177e4 LT	262	{
	263	int i;
	264
	265	for (i = 0; i < EISA_MAX_RESOURCES; i++) {
	266	/* Don't register resource for slot 0, since this is
	267	* very likely to fail... :-( Instead, grab the EISA
	268	* id, now we can display something in /proc/ioports.
	269	*/
	270
	271	/* Only one region for mainboard */
	272	if (!slot && i > 0) {
	273	edev->res[i].start = edev->res[i].end = 0;
	274	continue;
	275	}
	276
	277	if (slot) {
	278	edev->res[i].name = NULL;
33fd797b TLSC	279	edev->res[i].start = SLOT_ADDRESS(root, slot)
33fd797b TLSC	280	+ (i * 0x400);
1da177e4 LT	281	edev->res[i].end = edev->res[i].start + 0xff;
	282	edev->res[i].flags = IORESOURCE_IO;
	283	} else {
	284	edev->res[i].name = NULL;
33fd797b TLSC	285	edev->res[i].start = SLOT_ADDRESS(root, slot)
33fd797b TLSC	286	+ EISA_VENDOR_ID_OFFSET;
1da177e4 LT	287	edev->res[i].end = edev->res[i].start + 3;
	288	edev->res[i].flags = IORESOURCE_BUSY;
	289	}
	290
33fd797b	291	if (request_resource(root->res, &edev->res[i]))
1da177e4 LT	292	goto failed;
	293	}
	294
	295	return 0;
	296
	297	failed:
	298	while (--i >= 0)
33fd797b	299	release_resource(&edev->res[i]);
1da177e4 LT	300
	301	return -1;
	302	}
	303
33fd797b	304	static void __init eisa_release_resources(struct eisa_device *edev)
1da177e4 LT	305	{
	306	int i;
	307
	308	for (i = 0; i < EISA_MAX_RESOURCES; i++)
	309	if (edev->res[i].start \|\| edev->res[i].end)
33fd797b	310	release_resource(&edev->res[i]);
1da177e4 LT	311	}
1da177e4 LT	312
33fd797b	313	static int __init eisa_probe(struct eisa_root_device *root)
1da177e4 LT	314	{
	315	int i, c;
	316	struct eisa_device *edev;
	317
33fd797b TLSC	318	printk(KERN_INFO "EISA: Probing bus %d at %s\n",
33fd797b TLSC	319	root->bus_nr, dev_name(root->dev));
1da177e4 LT	320
	321	/* First try to get hold of slot 0. If there is no device
	322	* here, simply fail, unless root->force_probe is set. */
	323
33fd797b TLSC	324	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
	325	if (!edev) {
	326	printk(KERN_ERR "EISA: Couldn't allocate mainboard slot\n");
1da177e4 LT	327	return -ENOMEM;
	328	}
	329
33fd797b TLSC	330	if (eisa_request_resources(root, edev, 0)) {
	331	printk(KERN_WARNING \
	332	"EISA: Cannot allocate resource for mainboard\n");
	333	kfree(edev);
1da177e4 LT	334	if (!root->force_probe)
	335	return -EBUSY;
	336	goto force_probe;
	337	}
	338
33fd797b TLSC	339	if (eisa_init_device(root, edev, 0)) {
	340	eisa_release_resources(edev);
	341	kfree(edev);
1da177e4 LT	342	if (!root->force_probe)
	343	return -ENODEV;
	344	goto force_probe;
	345	}
	346
33fd797b	347	printk(KERN_INFO "EISA: Mainboard %s detected.\n", edev->id.sig);
1da177e4	348
33fd797b TLSC	349	if (eisa_register_device(edev)) {
	350	printk(KERN_ERR "EISA: Failed to register %s\n",
	351	edev->id.sig);
	352	eisa_release_resources(edev);
	353	kfree(edev);
1da177e4 LT	354	}
	355
	356	force_probe:
	357
	358	for (c = 0, i = 1; i <= root->slots; i++) {
33fd797b TLSC	359	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
	360	if (!edev) {
	361	printk(KERN_ERR "EISA: Out of memory for slot %d\n", i);
1da177e4 LT	362	continue;
1da177e4 LT	363	}
1da177e4	364
33fd797b TLSC	365	if (eisa_request_resources(root, edev, i)) {
	366	printk(KERN_WARNING \
	367	"Cannot allocate resource for EISA slot %d\n",
	368	i);
	369	kfree(edev);
1da177e4 LT	370	continue;
	371	}
	372
33fd797b TLSC	373	if (eisa_init_device(root, edev, i)) {
	374	eisa_release_resources(edev);
	375	kfree(edev);
1da177e4 LT	376	continue;
	377	}
	378
33fd797b TLSC	379	printk(KERN_INFO "EISA: slot %d : %s detected",
33fd797b TLSC	380	i, edev->id.sig);
1da177e4 LT	381
	382	switch (edev->state) {
	383	case EISA_CONFIG_ENABLED \| EISA_CONFIG_FORCED:
33fd797b	384	printk(" (forced enabled)");
1da177e4 LT	385	break;
	386
	387	case EISA_CONFIG_FORCED:
33fd797b	388	printk(" (forced disabled)");
1da177e4 LT	389	break;
	390
	391	case 0:
33fd797b	392	printk(" (disabled)");
1da177e4 LT	393	break;
	394	}
	395
	396	printk (".\n");
	397
	398	c++;
	399
33fd797b TLSC	400	if (eisa_register_device(edev)) {
	401	printk(KERN_ERR "EISA: Failed to register %s\n",
	402	edev->id.sig);
	403	eisa_release_resources(edev);
	404	kfree(edev);
1da177e4 LT	405	}
	406	}
	407
33fd797b	408	printk(KERN_INFO "EISA: Detected %d card%s.\n", c, c == 1 ? "" : "s");
1da177e4 LT	409
	410	return 0;
	411	}
	412
	413	static struct resource eisa_root_res = {
	414	.name = "EISA root resource",
	415	.start = 0,
	416	.end = 0xffffffff,
	417	.flags = IORESOURCE_IO,
	418	};
	419
	420	static int eisa_bus_count;
	421
33fd797b	422	int __init eisa_root_register(struct eisa_root_device *root)
1da177e4 LT	423	{
	424	int err;
	425
	426	/* Use our own resources to check if this bus base address has
	427	* been already registered. This prevents the virtual root
	428	* device from registering after the real one has, for
	429	* example... */
	430
	431	root->eisa_root_res.name = eisa_root_res.name;
	432	root->eisa_root_res.start = root->res->start;
	433	root->eisa_root_res.end = root->res->end;
	434	root->eisa_root_res.flags = IORESOURCE_BUSY;
	435
33fd797b TLSC	436	err = request_resource(&eisa_root_res, &root->eisa_root_res);
33fd797b TLSC	437	if (err)
1da177e4 LT	438	return err;
	439
	440	root->bus_nr = eisa_bus_count++;
	441
33fd797b TLSC	442	err = eisa_probe(root);
	443	if (err)
	444	release_resource(&root->eisa_root_res);
1da177e4 LT	445
	446	return err;
	447	}
	448
33fd797b	449	static int __init eisa_init(void)
1da177e4 LT	450	{
	451	int r;
	452
33fd797b TLSC	453	r = bus_register(&eisa_bus_type);
33fd797b TLSC	454	if (r)
1da177e4 LT	455	return r;
1da177e4 LT	456
33fd797b	457	printk(KERN_INFO "EISA bus registered\n");
1da177e4 LT	458	return 0;
	459	}
	460
	461	module_param_array(enable_dev, int, &enable_dev_count, 0444);
	462	module_param_array(disable_dev, int, &disable_dev_count, 0444);
	463
33fd797b	464	postcore_initcall(eisa_init);
1da177e4 LT	465
1da177e4 LT	466	int EISA_bus; /* for legacy drivers */
33fd797b	467	EXPORT_SYMBOL(EISA_bus);