[linux-2.6] / 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[DEVICE_NAME_SIZE];
};

#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 int enable_dev_count;
static int disable_dev[EISA_MAX_FORCED_DEV];
static 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,
				 DEVICE_NAME_SIZE);
			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;
}

struct bus_type eisa_bus_type = {
	.name  = "eisa",
	.match = eisa_bus_match,
};

int eisa_driver_register (struct eisa_driver *edrv)
{
	int r;
	
	edrv->driver.bus = &eisa_bus_type;
	if ((r = driver_register (&edrv->driver)) < 0)
		return r;

	return 0;
}

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

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 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;

	if (!(sig = decode_eisa_sig (sig_addr)))
		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;
	sprintf (edev->dev.bus_id, "%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)
{
	if (device_register (&edev->dev))
		return -1;

	device_create_file (&edev->dev, &dev_attr_signature);
	device_create_file (&edev->dev, &dev_attr_enabled);

	return 0;
}

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, root->dev->bus_id);

	/* First try to get hold of slot 0. If there is no device
	 * here, simply fail, unless root->force_probe is set. */
	
	if (!(edev = kmalloc (sizeof (*edev), GFP_KERNEL))) {
		printk (KERN_ERR "EISA: Couldn't allocate mainboard slot\n");
		return -ENOMEM;
	}
		
	memset (edev, 0, sizeof (*edev));

	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++) {
		if (!(edev = kmalloc (sizeof (*edev), GFP_KERNEL))) {
			printk (KERN_ERR "EISA: Out of memory for slot %d\n",
				i);
			continue;
		}
		
		memset (edev, 0, sizeof (*edev));

		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;

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

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

	return err;
}

static int __init eisa_init (void)
{
	int r;
	
	if ((r = bus_register (&eisa_bus_type)))
		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);
EXPORT_SYMBOL (eisa_bus_type);
EXPORT_SYMBOL (eisa_driver_register);
EXPORT_SYMBOL (eisa_driver_unregister);
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;
	25	char name[DEVICE_NAME_SIZE];
	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];
	38	static int enable_dev_count;
	39	static int disable_dev[EISA_MAX_FORCED_DEV];
	40	static int disable_dev_count;
	41
	42	static int is_forced_dev (int *forced_tab,
	43	int forced_count,
	44	struct eisa_root_device *root,
	45	struct eisa_device *edev)
	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
	58	static void __init eisa_name_device (struct eisa_device *edev)
	59	{
	60	#ifdef CONFIG_EISA_NAMES
	61	int i;
	62	for (i = 0; i < EISA_INFOS; i++) {
	63	if (!strcmp (edev->id.sig, eisa_table[i].id.sig)) {
	64	strlcpy (edev->pretty_name,
65	eisa_table[i].name,
66	DEVICE_NAME_SIZE);
67	return;
68	}
69	}
70
71	/* No name was found */
72	sprintf (edev->pretty_name, "EISA device %.7s", edev->id.sig);
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
94	sig[i] = inb (addr + i);
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
109	static int eisa_bus_match (struct device dev, struct device_driver drv)
110	{
111	struct eisa_device *edev = to_eisa_device (dev);
112	struct eisa_driver *edrv = to_eisa_driver (drv);
113	const struct eisa_device_id *eids = edrv->id_table;
114
115	if (!eids)
116	return 0;
117
118	while (strlen (eids->sig)) {
119	if (!strcmp (eids->sig, edev->id.sig) &&
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
131	struct bus_type eisa_bus_type = {
132	.name = "eisa",
133	.match = eisa_bus_match,
134	};
135
136	int eisa_driver_register (struct eisa_driver *edrv)
137	{
138	int r;
139
140	edrv->driver.bus = &eisa_bus_type;
141	if ((r = driver_register (&edrv->driver)) < 0)
142	return r;
143
144	return 0;
145	}
146
147	void eisa_driver_unregister (struct eisa_driver *edrv)
148	{
149	driver_unregister (&edrv->driver);
150	}
151
74880c06	152	static ssize_t eisa_show_sig (struct device dev, struct device_attribute attr, char *buf)
1da177e4 LT	153	{
	154	struct eisa_device *edev = to_eisa_device (dev);
	155	return sprintf (buf,"%s\n", edev->id.sig);
	156	}
	157
	158	static DEVICE_ATTR(signature, S_IRUGO, eisa_show_sig, NULL);
	159
74880c06	160	static ssize_t eisa_show_state (struct device dev, struct device_attribute attr, char *buf)
1da177e4 LT	161	{
	162	struct eisa_device *edev = to_eisa_device (dev);
	163	return sprintf (buf,"%d\n", edev->state & EISA_CONFIG_ENABLED);
	164	}
	165
	166	static DEVICE_ATTR(enabled, S_IRUGO, eisa_show_state, NULL);
	167
	168	static int __init eisa_init_device (struct eisa_root_device *root,
	169	struct eisa_device *edev,
	170	int slot)
	171	{
	172	char *sig;
	173	unsigned long sig_addr;
	174	int i;
	175
	176	sig_addr = SLOT_ADDRESS (root, slot) + EISA_VENDOR_ID_OFFSET;
	177
	178	if (!(sig = decode_eisa_sig (sig_addr)))
	179	return -1; /* No EISA device here */
	180
	181	memcpy (edev->id.sig, sig, EISA_SIG_LEN);
	182	edev->slot = slot;
	183	edev->state = inb (SLOT_ADDRESS (root, slot) + EISA_CONFIG_OFFSET) & EISA_CONFIG_ENABLED;
	184	edev->base_addr = SLOT_ADDRESS (root, slot);
	185	edev->dma_mask = root->dma_mask; /* Default DMA mask */
	186	eisa_name_device (edev);
	187	edev->dev.parent = root->dev;
	188	edev->dev.bus = &eisa_bus_type;
	189	edev->dev.dma_mask = &edev->dma_mask;
	190	edev->dev.coherent_dma_mask = edev->dma_mask;
	191	sprintf (edev->dev.bus_id, "%02X:%02X", root->bus_nr, slot);
	192
	193	for (i = 0; i < EISA_MAX_RESOURCES; i++) {
	194	#ifdef CONFIG_EISA_NAMES
	195	edev->res[i].name = edev->pretty_name;
	196	#else
	197	edev->res[i].name = edev->id.sig;
	198	#endif
	199	}
	200
	201	if (is_forced_dev (enable_dev, enable_dev_count, root, edev))
	202	edev->state = EISA_CONFIG_ENABLED \| EISA_CONFIG_FORCED;
	203
	204	if (is_forced_dev (disable_dev, disable_dev_count, root, edev))
	205	edev->state = EISA_CONFIG_FORCED;
	206
	207	return 0;
	208	}
	209
	210	static int __init eisa_register_device (struct eisa_device *edev)
	211	{
	212	if (device_register (&edev->dev))
	213	return -1;
	214
	215	device_create_file (&edev->dev, &dev_attr_signature);
	216	device_create_file (&edev->dev, &dev_attr_enabled);
	217
	218	return 0;
	219	}
	220
	221	static int __init eisa_request_resources (struct eisa_root_device *root,
	222	struct eisa_device *edev,
	223	int slot)
	224	{
225	int i;
226
227	for (i = 0; i < EISA_MAX_RESOURCES; i++) {
228	/* Don't register resource for slot 0, since this is
229	* very likely to fail... :-( Instead, grab the EISA
230	* id, now we can display something in /proc/ioports.
231	*/
232
233	/* Only one region for mainboard */
234	if (!slot && i > 0) {
235	edev->res[i].start = edev->res[i].end = 0;
236	continue;
237	}
238
239	if (slot) {
240	edev->res[i].name = NULL;
241	edev->res[i].start = SLOT_ADDRESS (root, slot) + (i * 0x400);
242	edev->res[i].end = edev->res[i].start + 0xff;
243	edev->res[i].flags = IORESOURCE_IO;
244	} else {
245	edev->res[i].name = NULL;
246	edev->res[i].start = SLOT_ADDRESS (root, slot) + EISA_VENDOR_ID_OFFSET;
247	edev->res[i].end = edev->res[i].start + 3;
248	edev->res[i].flags = IORESOURCE_BUSY;
249	}
250
251	if (request_resource (root->res, &edev->res[i]))
252	goto failed;
253	}
254
255	return 0;
256
257	failed:
258	while (--i >= 0)
259	release_resource (&edev->res[i]);
260
261	return -1;
262	}
263
264	static void __init eisa_release_resources (struct eisa_device *edev)
265	{
266	int i;
267
268	for (i = 0; i < EISA_MAX_RESOURCES; i++)
269	if (edev->res[i].start \|\| edev->res[i].end)
270	release_resource (&edev->res[i]);
271	}
272
273	static int __init eisa_probe (struct eisa_root_device *root)
274	{
275	int i, c;
276	struct eisa_device *edev;
277
278	printk (KERN_INFO "EISA: Probing bus %d at %s\n",
279	root->bus_nr, root->dev->bus_id);
280
281	/* First try to get hold of slot 0. If there is no device
282	* here, simply fail, unless root->force_probe is set. */
283
284	if (!(edev = kmalloc (sizeof (*edev), GFP_KERNEL))) {
285	printk (KERN_ERR "EISA: Couldn't allocate mainboard slot\n");
286	return -ENOMEM;
287	}
288
289	memset (edev, 0, sizeof (*edev));
290
291	if (eisa_request_resources (root, edev, 0)) {
292	printk (KERN_WARNING \
293	"EISA: Cannot allocate resource for mainboard\n");
294	kfree (edev);
295	if (!root->force_probe)
296	return -EBUSY;
297	goto force_probe;
298	}
299
300	if (eisa_init_device (root, edev, 0)) {
301	eisa_release_resources (edev);
302	kfree (edev);
303	if (!root->force_probe)
304	return -ENODEV;
305	goto force_probe;
306	}
307
308	printk (KERN_INFO "EISA: Mainboard %s detected.\n", edev->id.sig);
309
310	if (eisa_register_device (edev)) {
311	printk (KERN_ERR "EISA: Failed to register %s\n",
312	edev->id.sig);
313	eisa_release_resources (edev);
314	kfree (edev);
315	}
316
317	force_probe:
318
319	for (c = 0, i = 1; i <= root->slots; i++) {
320	if (!(edev = kmalloc (sizeof (*edev), GFP_KERNEL))) {
321	printk (KERN_ERR "EISA: Out of memory for slot %d\n",
322	i);
323	continue;
324	}
325
326	memset (edev, 0, sizeof (*edev));
327
328	if (eisa_request_resources (root, edev, i)) {
329	printk (KERN_WARNING \
330	"Cannot allocate resource for EISA slot %d\n",
331	i);
332	kfree (edev);
333	continue;
334	}
335
336	if (eisa_init_device (root, edev, i)) {
337	eisa_release_resources (edev);
338	kfree (edev);
339	continue;
340	}
341
342	printk (KERN_INFO "EISA: slot %d : %s detected",
343	i, edev->id.sig);
344
345	switch (edev->state) {
346	case EISA_CONFIG_ENABLED \| EISA_CONFIG_FORCED:
347	printk (" (forced enabled)");
348	break;
349
350	case EISA_CONFIG_FORCED:
351	printk (" (forced disabled)");
352	break;
353
354	case 0:
355	printk (" (disabled)");
356	break;
357	}
358
359	printk (".\n");
360
361	c++;
362
363	if (eisa_register_device (edev)) {
364	printk (KERN_ERR "EISA: Failed to register %s\n",
365	edev->id.sig);
366	eisa_release_resources (edev);
367	kfree (edev);
368	}
369	}
370
371	printk (KERN_INFO "EISA: Detected %d card%s.\n", c, c == 1 ? "" : "s");
372
373	return 0;
374	}
375
376	static struct resource eisa_root_res = {
377	.name = "EISA root resource",
378	.start = 0,
379	.end = 0xffffffff,
380	.flags = IORESOURCE_IO,
381	};
382
383	static int eisa_bus_count;
384
385	int __init eisa_root_register (struct eisa_root_device *root)
386	{
387	int err;
388
389	/* Use our own resources to check if this bus base address has
390	* been already registered. This prevents the virtual root
391	* device from registering after the real one has, for
392	* example... */
393
394	root->eisa_root_res.name = eisa_root_res.name;
395	root->eisa_root_res.start = root->res->start;
396	root->eisa_root_res.end = root->res->end;
397	root->eisa_root_res.flags = IORESOURCE_BUSY;
398
399	if ((err = request_resource (&eisa_root_res, &root->eisa_root_res)))
400	return err;
401
402	root->bus_nr = eisa_bus_count++;
403
404	if ((err = eisa_probe (root)))
405	release_resource (&root->eisa_root_res);
406
407	return err;
408	}
409
410	static int __init eisa_init (void)
411	{
412	int r;
413
414	if ((r = bus_register (&eisa_bus_type)))
415	return r;
416
417	printk (KERN_INFO "EISA bus registered\n");
418	return 0;
419	}
420
421	module_param_array(enable_dev, int, &enable_dev_count, 0444);
422	module_param_array(disable_dev, int, &disable_dev_count, 0444);
423
424	postcore_initcall (eisa_init);
425
426	int EISA_bus; /* for legacy drivers */
427	EXPORT_SYMBOL (EISA_bus);
428	EXPORT_SYMBOL (eisa_bus_type);
429	EXPORT_SYMBOL (eisa_driver_register);
430	EXPORT_SYMBOL (eisa_driver_unregister);