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

// SPDX-License-Identifier: GPL-2.0-only
/*
 * EISA bus support functions for sysfs.
 *
 * (C) 2002, 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
 */

#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)
		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
d1d24ed4	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4 LT	2	/*
	3	* EISA bus support functions for sysfs.
	4	*
	5	* (C) 2002, 2003 Marc Zyngier <maz@wild-wind.fr.eu.org>
1da177e4 LT	6	*/
	7
	8	#include <linux/kernel.h>
	9	#include <linux/device.h>
	10	#include <linux/eisa.h>
	11	#include <linux/module.h>
	12	#include <linux/moduleparam.h>
	13	#include <linux/init.h>
	14	#include <linux/slab.h>
	15	#include <linux/ioport.h>
	16	#include <asm/io.h>
	17
	18	#define SLOT_ADDRESS(r,n) (r->bus_base_addr + (0x1000 * n))
	19
	20	#define EISA_DEVINFO(i,s) { .id = { .sig = i }, .name = s }
	21
	22	struct eisa_device_info {
	23	struct eisa_device_id id;
ca52a498	24	char name[50];
1da177e4 LT	25	};
	26
	27	#ifdef CONFIG_EISA_NAMES
	28	static struct eisa_device_info __initdata eisa_table[] = {
	29	#include "devlist.h"
	30	};
	31	#define EISA_INFOS (sizeof (eisa_table) / (sizeof (struct eisa_device_info)))
	32	#endif
	33
	34	#define EISA_MAX_FORCED_DEV 16
	35
	36	static int enable_dev[EISA_MAX_FORCED_DEV];
64a6f950	37	static unsigned int enable_dev_count;
1da177e4	38	static int disable_dev[EISA_MAX_FORCED_DEV];
64a6f950	39	static unsigned int disable_dev_count;
1da177e4	40
33fd797b TLSC	41	static int is_forced_dev(int *forced_tab,
	42	int forced_count,
	43	struct eisa_root_device *root,
	44	struct eisa_device *edev)
1da177e4 LT	45	{
	46	int i, x;
	47
	48	for (i = 0; i < forced_count; i++) {
	49	x = (root->bus_nr << 8) \| edev->slot;
	50	if (forced_tab[i] == x)
	51	return 1;
	52	}
	53
	54	return 0;
	55	}
	56
33fd797b	57	static void __init eisa_name_device(struct eisa_device *edev)
1da177e4 LT	58	{
	59	#ifdef CONFIG_EISA_NAMES
	60	int i;
	61	for (i = 0; i < EISA_INFOS; i++) {
33fd797b TLSC	62	if (!strcmp(edev->id.sig, eisa_table[i].id.sig)) {
	63	strlcpy(edev->pretty_name,
	64	eisa_table[i].name,
	65	sizeof(edev->pretty_name));
1da177e4 LT	66	return;
	67	}
	68	}
	69
	70	/* No name was found */
33fd797b	71	sprintf(edev->pretty_name, "EISA device %.7s", edev->id.sig);
1da177e4 LT	72	#endif
	73	}
	74
	75	static char __init *decode_eisa_sig(unsigned long addr)
	76	{
91809d22	77	static char sig_str[EISA_SIG_LEN];
1da177e4	78	u8 sig[4];
91809d22	79	u16 rev;
1da177e4 LT	80	int i;
	81
	82	for (i = 0; i < 4; i++) {
	83	#ifdef CONFIG_EISA_VLB_PRIMING
	84	/*
	85	* This ugly stuff is used to wake up VL-bus cards
	86	* (AHA-284x is the only known example), so we can
	87	* read the EISA id.
	88	*
	89	* Thankfully, this only exists on x86...
	90	*/
	91	outb(0x80 + i, addr);
	92	#endif
33fd797b	93	sig[i] = inb(addr + i);
1da177e4 LT	94
	95	if (!i && (sig[0] & 0x80))
	96	return NULL;
	97	}
91809d22 LM	98
	99	sig_str[0] = ((sig[0] >> 2) & 0x1f) + ('A' - 1);
	100	sig_str[1] = (((sig[0] & 3) << 3) \| (sig[1] >> 5)) + ('A' - 1);
	101	sig_str[2] = (sig[1] & 0x1f) + ('A' - 1);
	102	rev = (sig[2] << 8) \| sig[3];
	103	sprintf(sig_str + 3, "%04X", rev);
	104
	105	return sig_str;
1da177e4 LT	106	}
1da177e4 LT	107
33fd797b	108	static int eisa_bus_match(struct device dev, struct device_driver drv)
1da177e4	109	{
33fd797b TLSC	110	struct eisa_device *edev = to_eisa_device(dev);
33fd797b TLSC	111	struct eisa_driver *edrv = to_eisa_driver(drv);
1da177e4 LT	112	const struct eisa_device_id *eids = edrv->id_table;
	113
	114	if (!eids)
	115	return 0;
	116
33fd797b TLSC	117	while (strlen(eids->sig)) {
33fd797b TLSC	118	if (!strcmp(eids->sig, edev->id.sig) &&
1da177e4 LT	119	edev->state & EISA_CONFIG_ENABLED) {
	120	edev->id.driver_data = eids->driver_data;
	121	return 1;
	122	}
	123
	124	eids++;
	125	}
	126
	127	return 0;
	128	}
	129
7eff2e7a	130	static int eisa_bus_uevent(struct device dev, struct kobj_uevent_env env)
07563c71 MT	131	{
07563c71 MT	132	struct eisa_device *edev = to_eisa_device(dev);
07563c71	133
7eff2e7a	134	add_uevent_var(env, "MODALIAS=" EISA_DEVICE_MODALIAS_FMT, edev->id.sig);
07563c71 MT	135	return 0;
	136	}
	137
1da177e4 LT	138	struct bus_type eisa_bus_type = {
	139	.name = "eisa",
	140	.match = eisa_bus_match,
07563c71	141	.uevent = eisa_bus_uevent,
1da177e4	142	};
33fd797b	143	EXPORT_SYMBOL(eisa_bus_type);
1da177e4	144
33fd797b	145	int eisa_driver_register(struct eisa_driver *edrv)
1da177e4	146	{
1da177e4	147	edrv->driver.bus = &eisa_bus_type;
33fd797b	148	return driver_register(&edrv->driver);
1da177e4	149	}
33fd797b	150	EXPORT_SYMBOL(eisa_driver_register);
1da177e4	151
33fd797b	152	void eisa_driver_unregister(struct eisa_driver *edrv)
1da177e4	153	{
33fd797b	154	driver_unregister(&edrv->driver);
1da177e4	155	}
33fd797b	156	EXPORT_SYMBOL(eisa_driver_unregister);
1da177e4	157
33fd797b TLSC	158	static ssize_t eisa_show_sig(struct device dev, struct device_attribute attr,
33fd797b TLSC	159	char *buf)
1da177e4	160	{
33fd797b TLSC	161	struct eisa_device *edev = to_eisa_device(dev);
33fd797b TLSC	162	return sprintf(buf, "%s\n", edev->id.sig);
1da177e4 LT	163	}
	164
	165	static DEVICE_ATTR(signature, S_IRUGO, eisa_show_sig, NULL);
	166
33fd797b TLSC	167	static ssize_t eisa_show_state(struct device *dev,
	168	struct device_attribute *attr,
	169	char *buf)
1da177e4	170	{
33fd797b TLSC	171	struct eisa_device *edev = to_eisa_device(dev);
33fd797b TLSC	172	return sprintf(buf, "%d\n", edev->state & EISA_CONFIG_ENABLED);
1da177e4 LT	173	}
	174
	175	static DEVICE_ATTR(enabled, S_IRUGO, eisa_show_state, NULL);
	176
33fd797b TLSC	177	static ssize_t eisa_show_modalias(struct device *dev,
	178	struct device_attribute *attr,
	179	char *buf)
07563c71	180	{
33fd797b TLSC	181	struct eisa_device *edev = to_eisa_device(dev);
33fd797b TLSC	182	return sprintf(buf, EISA_DEVICE_MODALIAS_FMT "\n", edev->id.sig);
07563c71 MT	183	}
	184
	185	static DEVICE_ATTR(modalias, S_IRUGO, eisa_show_modalias, NULL);
	186
33fd797b TLSC	187	static int __init eisa_init_device(struct eisa_root_device *root,
	188	struct eisa_device *edev,
	189	int slot)
1da177e4 LT	190	{
1da177e4 LT	191	char *sig;
33fd797b	192	unsigned long sig_addr;
1da177e4 LT	193	int i;
1da177e4 LT	194
33fd797b	195	sig_addr = SLOT_ADDRESS(root, slot) + EISA_VENDOR_ID_OFFSET;
1da177e4	196
33fd797b TLSC	197	sig = decode_eisa_sig(sig_addr);
33fd797b TLSC	198	if (!sig)
1da177e4	199	return -1; /* No EISA device here */
91809d22	200
33fd797b	201	memcpy(edev->id.sig, sig, EISA_SIG_LEN);
1da177e4	202	edev->slot = slot;
33fd797b TLSC	203	edev->state = inb(SLOT_ADDRESS(root, slot) + EISA_CONFIG_OFFSET)
	204	& EISA_CONFIG_ENABLED;
	205	edev->base_addr = SLOT_ADDRESS(root, slot);
1da177e4	206	edev->dma_mask = root->dma_mask; /* Default DMA mask */
33fd797b	207	eisa_name_device(edev);
1da177e4 LT	208	edev->dev.parent = root->dev;
	209	edev->dev.bus = &eisa_bus_type;
	210	edev->dev.dma_mask = &edev->dma_mask;
	211	edev->dev.coherent_dma_mask = edev->dma_mask;
e537b245	212	dev_set_name(&edev->dev, "%02X:%02X", root->bus_nr, slot);
1da177e4 LT	213
	214	for (i = 0; i < EISA_MAX_RESOURCES; i++) {
	215	#ifdef CONFIG_EISA_NAMES
	216	edev->res[i].name = edev->pretty_name;
	217	#else
	218	edev->res[i].name = edev->id.sig;
	219	#endif
	220	}
	221
33fd797b	222	if (is_forced_dev(enable_dev, enable_dev_count, root, edev))
1da177e4	223	edev->state = EISA_CONFIG_ENABLED \| EISA_CONFIG_FORCED;
91809d22	224
33fd797b	225	if (is_forced_dev(disable_dev, disable_dev_count, root, edev))
1da177e4 LT	226	edev->state = EISA_CONFIG_FORCED;
	227
	228	return 0;
	229	}
	230
33fd797b	231	static int __init eisa_register_device(struct eisa_device *edev)
1da177e4	232	{
33fd797b	233	int rc = device_register(&edev->dev);
04df008a LK	234	if (rc) {
04df008a LK	235	put_device(&edev->dev);
42ddfd68	236	return rc;
04df008a	237	}
1da177e4	238
33fd797b TLSC	239	rc = device_create_file(&edev->dev, &dev_attr_signature);
	240	if (rc)
	241	goto err_devreg;
	242	rc = device_create_file(&edev->dev, &dev_attr_enabled);
	243	if (rc)
	244	goto err_sig;
	245	rc = device_create_file(&edev->dev, &dev_attr_modalias);
	246	if (rc)
	247	goto err_enab;
1da177e4 LT	248
1da177e4 LT	249	return 0;
42ddfd68 JG	250
42ddfd68 JG	251	err_enab:
33fd797b	252	device_remove_file(&edev->dev, &dev_attr_enabled);
42ddfd68	253	err_sig:
33fd797b	254	device_remove_file(&edev->dev, &dev_attr_signature);
42ddfd68 JG	255	err_devreg:
	256	device_unregister(&edev->dev);
	257	return rc;
1da177e4 LT	258	}
1da177e4 LT	259
33fd797b TLSC	260	static int __init eisa_request_resources(struct eisa_root_device *root,
	261	struct eisa_device *edev,
	262	int slot)
1da177e4 LT	263	{
	264	int i;
	265
	266	for (i = 0; i < EISA_MAX_RESOURCES; i++) {
	267	/* Don't register resource for slot 0, since this is
	268	* very likely to fail... :-( Instead, grab the EISA
	269	* id, now we can display something in /proc/ioports.
	270	*/
	271
	272	/* Only one region for mainboard */
	273	if (!slot && i > 0) {
	274	edev->res[i].start = edev->res[i].end = 0;
	275	continue;
	276	}
91809d22	277
1da177e4	278	if (slot) {
765ee51f	279	edev->res[i].name = NULL;
33fd797b TLSC	280	edev->res[i].start = SLOT_ADDRESS(root, slot)
33fd797b TLSC	281	+ (i * 0x400);
1da177e4 LT	282	edev->res[i].end = edev->res[i].start + 0xff;
	283	edev->res[i].flags = IORESOURCE_IO;
	284	} else {
765ee51f	285	edev->res[i].name = NULL;
33fd797b TLSC	286	edev->res[i].start = SLOT_ADDRESS(root, slot)
33fd797b TLSC	287	+ EISA_VENDOR_ID_OFFSET;
1da177e4	288	edev->res[i].end = edev->res[i].start + 3;
76668257	289	edev->res[i].flags = IORESOURCE_IO \| IORESOURCE_BUSY;
1da177e4 LT	290	}
1da177e4 LT	291
33fd797b	292	if (request_resource(root->res, &edev->res[i]))
1da177e4 LT	293	goto failed;
	294	}
	295
	296	return 0;
91809d22	297
1da177e4 LT	298	failed:
1da177e4 LT	299	while (--i >= 0)
33fd797b	300	release_resource(&edev->res[i]);
1da177e4 LT	301
	302	return -1;
	303	}
	304
33fd797b	305	static void __init eisa_release_resources(struct eisa_device *edev)
1da177e4 LT	306	{
	307	int i;
	308
	309	for (i = 0; i < EISA_MAX_RESOURCES; i++)
	310	if (edev->res[i].start \|\| edev->res[i].end)
33fd797b	311	release_resource(&edev->res[i]);
1da177e4 LT	312	}
1da177e4 LT	313
33fd797b	314	static int __init eisa_probe(struct eisa_root_device *root)
1da177e4	315	{
91809d22	316	int i, c;
1da177e4	317	struct eisa_device *edev;
4cf9f24d	318	char *enabled_str;
1da177e4	319
4cf9f24d	320	dev_info(root->dev, "Probing EISA bus %d\n", root->bus_nr);
1da177e4 LT	321
	322	/* First try to get hold of slot 0. If there is no device
	323	* here, simply fail, unless root->force_probe is set. */
91809d22	324
33fd797b	325	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
3ea98d47	326	if (!edev)
1da177e4	327	return -ENOMEM;
91809d22	328
765ee51f BH	329	if (eisa_request_resources(root, edev, 0)) {
765ee51f BH	330	dev_warn(root->dev,
91809d22	331	"EISA: Cannot allocate resource for mainboard\n");
33fd797b	332	kfree(edev);
1da177e4	333	if (!root->force_probe)
765ee51f	334	return -EBUSY;
1da177e4 LT	335	goto force_probe;
	336	}
	337
765ee51f BH	338	if (eisa_init_device(root, edev, 0)) {
765ee51f BH	339	eisa_release_resources(edev);
33fd797b	340	kfree(edev);
1da177e4	341	if (!root->force_probe)
765ee51f	342	return -ENODEV;
1da177e4 LT	343	goto force_probe;
	344	}
	345
4cf9f24d	346	dev_info(&edev->dev, "EISA: Mainboard %s detected\n", edev->id.sig);
1da177e4	347
33fd797b	348	if (eisa_register_device(edev)) {
4cf9f24d	349	dev_err(&edev->dev, "EISA: Failed to register %s\n",
91809d22	350	edev->id.sig);
33fd797b TLSC	351	eisa_release_resources(edev);
33fd797b TLSC	352	kfree(edev);
1da177e4	353	}
91809d22	354
1da177e4	355	force_probe:
91809d22 LM	356
91809d22 LM	357	for (c = 0, i = 1; i <= root->slots; i++) {
33fd797b TLSC	358	edev = kzalloc(sizeof(*edev), GFP_KERNEL);
33fd797b TLSC	359	if (!edev) {
4cf9f24d BH	360	dev_err(root->dev, "EISA: Out of memory for slot %d\n",
4cf9f24d BH	361	i);
1da177e4 LT	362	continue;
1da177e4 LT	363	}
1da177e4	364
26abfeed BH	365	if (eisa_request_resources(root, edev, i)) {
26abfeed BH	366	dev_warn(root->dev,
91809d22 LM	367	"Cannot allocate resource for EISA slot %d\n",
91809d22 LM	368	i);
33fd797b	369	kfree(edev);
1da177e4 LT	370	continue;
1da177e4 LT	371	}
4cf9f24d	372
765ee51f BH	373	if (eisa_init_device(root, edev, i)) {
	374	eisa_release_resources(edev);
	375	kfree(edev);
	376	continue;
	377	}
	378
4cf9f24d BH	379	if (edev->state == (EISA_CONFIG_ENABLED \| EISA_CONFIG_FORCED))
	380	enabled_str = " (forced enabled)";
	381	else if (edev->state == EISA_CONFIG_FORCED)
	382	enabled_str = " (forced disabled)";
	383	else if (edev->state == 0)
	384	enabled_str = " (disabled)";
	385	else
	386	enabled_str = "";
	387
	388	dev_info(&edev->dev, "EISA: slot %d: %s detected%s\n", i,
	389	edev->id.sig, enabled_str);
1da177e4 LT	390
	391	c++;
	392
33fd797b	393	if (eisa_register_device(edev)) {
4cf9f24d	394	dev_err(&edev->dev, "EISA: Failed to register %s\n",
91809d22	395	edev->id.sig);
33fd797b TLSC	396	eisa_release_resources(edev);
33fd797b TLSC	397	kfree(edev);
1da177e4	398	}
91809d22	399	}
1da177e4	400
4cf9f24d	401	dev_info(root->dev, "EISA: Detected %d card%s\n", c, c == 1 ? "" : "s");
1da177e4 LT	402	return 0;
	403	}
	404
	405	static struct resource eisa_root_res = {
	406	.name = "EISA root resource",
	407	.start = 0,
	408	.end = 0xffffffff,
	409	.flags = IORESOURCE_IO,
	410	};
	411
	412	static int eisa_bus_count;
	413
33fd797b	414	int __init eisa_root_register(struct eisa_root_device *root)
1da177e4 LT	415	{
	416	int err;
	417
	418	/* Use our own resources to check if this bus base address has
	419	* been already registered. This prevents the virtual root
	420	* device from registering after the real one has, for
	421	* example... */
91809d22	422
1da177e4 LT	423	root->eisa_root_res.name = eisa_root_res.name;
	424	root->eisa_root_res.start = root->res->start;
	425	root->eisa_root_res.end = root->res->end;
	426	root->eisa_root_res.flags = IORESOURCE_BUSY;
	427
33fd797b TLSC	428	err = request_resource(&eisa_root_res, &root->eisa_root_res);
33fd797b TLSC	429	if (err)
1da177e4	430	return err;
91809d22	431
1da177e4 LT	432	root->bus_nr = eisa_bus_count++;
1da177e4 LT	433
33fd797b TLSC	434	err = eisa_probe(root);
	435	if (err)
	436	release_resource(&root->eisa_root_res);
1da177e4 LT	437
	438	return err;
	439	}
	440
33fd797b	441	static int __init eisa_init(void)
1da177e4 LT	442	{
1da177e4 LT	443	int r;
91809d22	444
33fd797b TLSC	445	r = bus_register(&eisa_bus_type);
33fd797b TLSC	446	if (r)
1da177e4 LT	447	return r;
1da177e4 LT	448
33fd797b	449	printk(KERN_INFO "EISA bus registered\n");
1da177e4 LT	450	return 0;
	451	}
	452
	453	module_param_array(enable_dev, int, &enable_dev_count, 0444);
	454	module_param_array(disable_dev, int, &disable_dev_count, 0444);
	455
33fd797b	456	postcore_initcall(eisa_init);
1da177e4 LT	457
1da177e4 LT	458	int EISA_bus; /* for legacy drivers */
33fd797b	459	EXPORT_SYMBOL(EISA_bus);