[net-next-2.6.git] / drivers / net / wireless / orinoco / airport.c

/* airport.c
 *
 * A driver for "Hermes" chipset based Apple Airport wireless
 * card.
 *
 * Copyright notice & release notes in file main.c
 *
 * Note specific to airport stub:
 *
 *  0.05 : first version of the new split driver
 *  0.06 : fix possible hang on powerup, add sleep support
 */

#define DRIVER_NAME "airport"
#define PFX DRIVER_NAME ": "

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <asm/pmac_feature.h>

#include "orinoco.h"

#define AIRPORT_IO_LEN	(0x1000)	/* one page */

struct airport {
	struct macio_dev *mdev;
	void __iomem *vaddr;
	unsigned int irq;
	int irq_requested;
	int ndev_registered;
};

static int
airport_suspend(struct macio_dev *mdev, pm_message_t state)
{
	struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev);
	struct net_device *dev = priv->ndev;
	struct airport *card = priv->card;
	unsigned long flags;
	int err;

	printk(KERN_DEBUG "%s: Airport entering sleep mode\n", dev->name);

	err = orinoco_lock(priv, &flags);
	if (err) {
		printk(KERN_ERR "%s: hw_unavailable on PBOOK_SLEEP_NOW\n",
		       dev->name);
		return 0;
	}

	orinoco_down(priv);
	orinoco_unlock(priv, &flags);

	disable_irq(card->irq);
	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
			  macio_get_of_node(mdev), 0, 0);

	return 0;
}

static int
airport_resume(struct macio_dev *mdev)
{
	struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev);
	struct net_device *dev = priv->ndev;
	struct airport *card = priv->card;
	unsigned long flags;
	int err;

	printk(KERN_DEBUG "%s: Airport waking up\n", dev->name);

	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
			  macio_get_of_node(mdev), 0, 1);
	msleep(200);

	enable_irq(card->irq);

	priv->hw.ops->lock_irqsave(&priv->lock, &flags);
	err = orinoco_up(priv);
	priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);

	return err;
}

static int
airport_detach(struct macio_dev *mdev)
{
	struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev);
	struct airport *card = priv->card;

	if (card->ndev_registered)
		orinoco_if_del(priv);
	card->ndev_registered = 0;

	if (card->irq_requested)
		free_irq(card->irq, priv);
	card->irq_requested = 0;

	if (card->vaddr)
		iounmap(card->vaddr);
	card->vaddr = NULL;

	macio_release_resource(mdev, 0);

	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
			  macio_get_of_node(mdev), 0, 0);
	ssleep(1);

	macio_set_drvdata(mdev, NULL);
	free_orinocodev(priv);

	return 0;
}

static int airport_hard_reset(struct orinoco_private *priv)
{
	/* It would be nice to power cycle the Airport for a real hard
	 * reset, but for some reason although it appears to
	 * re-initialize properly, it falls in a screaming heap
	 * shortly afterwards. */
#if 0
	struct airport *card = priv->card;

	/* Vitally important.  If we don't do this it seems we get an
	 * interrupt somewhere during the power cycle, since
	 * hw_unavailable is already set it doesn't get ACKed, we get
	 * into an interrupt loop and the PMU decides to turn us
	 * off. */
	disable_irq(card->irq);

	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
			  macio_get_of_node(card->mdev), 0, 0);
	ssleep(1);
	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
			  macio_get_of_node(card->mdev), 0, 1);
	ssleep(1);

	enable_irq(card->irq);
	ssleep(1);
#endif

	return 0;
}

static int
airport_attach(struct macio_dev *mdev, const struct of_device_id *match)
{
	struct orinoco_private *priv;
	struct airport *card;
	unsigned long phys_addr;
	hermes_t *hw;

	if (macio_resource_count(mdev) < 1 || macio_irq_count(mdev) < 1) {
		printk(KERN_ERR PFX "Wrong interrupt/addresses in OF tree\n");
		return -ENODEV;
	}

	/* Allocate space for private device-specific data */
	priv = alloc_orinocodev(sizeof(*card), &mdev->ofdev.dev,
				airport_hard_reset, NULL);
	if (!priv) {
		printk(KERN_ERR PFX "Cannot allocate network device\n");
		return -ENODEV;
	}
	card = priv->card;

	hw = &priv->hw;
	card->mdev = mdev;

	if (macio_request_resource(mdev, 0, DRIVER_NAME)) {
		printk(KERN_ERR PFX "can't request IO resource !\n");
		free_orinocodev(priv);
		return -EBUSY;
	}

	macio_set_drvdata(mdev, priv);

	/* Setup interrupts & base address */
	card->irq = macio_irq(mdev, 0);
	phys_addr = macio_resource_start(mdev, 0);  /* Physical address */
	printk(KERN_DEBUG PFX "Physical address %lx\n", phys_addr);
	card->vaddr = ioremap(phys_addr, AIRPORT_IO_LEN);
	if (!card->vaddr) {
		printk(KERN_ERR PFX "ioremap() failed\n");
		goto failed;
	}

	hermes_struct_init(hw, card->vaddr, HERMES_16BIT_REGSPACING);

	/* Power up card */
	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
			  macio_get_of_node(mdev), 0, 1);
	ssleep(1);

	/* Reset it before we get the interrupt */
	hw->ops->init(hw);

	if (request_irq(card->irq, orinoco_interrupt, 0, DRIVER_NAME, priv)) {
		printk(KERN_ERR PFX "Couldn't get IRQ %d\n", card->irq);
		goto failed;
	}
	card->irq_requested = 1;

	/* Initialise the main driver */
	if (orinoco_init(priv) != 0) {
		printk(KERN_ERR PFX "orinoco_init() failed\n");
		goto failed;
	}

	/* Register an interface with the stack */
	if (orinoco_if_add(priv, phys_addr, card->irq, NULL) != 0) {
		printk(KERN_ERR PFX "orinoco_if_add() failed\n");
		goto failed;
	}
	card->ndev_registered = 1;
	return 0;
 failed:
	airport_detach(mdev);
	return -ENODEV;
}				/* airport_attach */


static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
	" (Benjamin Herrenschmidt <benh@kernel.crashing.org>)";
MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
MODULE_DESCRIPTION("Driver for the Apple Airport wireless card.");
MODULE_LICENSE("Dual MPL/GPL");

static struct of_device_id airport_match[] =
{
	{
	.name 		= "radio",
	},
	{},
};

MODULE_DEVICE_TABLE(of, airport_match);

static struct macio_driver airport_driver = {
	.driver = {
		.name 		= DRIVER_NAME,
		.owner		= THIS_MODULE,
		.of_match_table	= airport_match,
	},
	.probe		= airport_attach,
	.remove		= airport_detach,
	.suspend	= airport_suspend,
	.resume		= airport_resume,
};

static int __init
init_airport(void)
{
	printk(KERN_DEBUG "%s\n", version);

	return macio_register_driver(&airport_driver);
}

static void __exit
exit_airport(void)
{
	macio_unregister_driver(&airport_driver);
}

module_init(init_airport);
module_exit(exit_airport);
Commit	Line	Data
1da177e4 LT	1	/* airport.c
	2	*
	3	* A driver for "Hermes" chipset based Apple Airport wireless
	4	* card.
	5	*
47445cb9	6	* Copyright notice & release notes in file main.c
d14c7c1d	7	*
1da177e4	8	* Note specific to airport stub:
d14c7c1d	9	*
1da177e4 LT	10	* 0.05 : first version of the new split driver
	11	* 0.06 : fix possible hang on powerup, add sleep support
	12	*/
	13
	14	#define DRIVER_NAME "airport"
	15	#define PFX DRIVER_NAME ": "
	16
1da177e4 LT	17	#include <linux/module.h>
	18	#include <linux/kernel.h>
	19	#include <linux/init.h>
ef846bf0	20	#include <linux/delay.h>
1da177e4	21	#include <asm/pmac_feature.h>
1da177e4 LT	22
	23	#include "orinoco.h"
	24
	25	#define AIRPORT_IO_LEN (0x1000) /* one page */
	26
	27	struct airport {
	28	struct macio_dev *mdev;
	29	void __iomem *vaddr;
ef96b5c9	30	unsigned int irq;
1da177e4 LT	31	int irq_requested;
	32	int ndev_registered;
	33	};
	34
	35	static int
05adc3b7	36	airport_suspend(struct macio_dev *mdev, pm_message_t state)
1da177e4	37	{
a2608362 DK	38	struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev);
a2608362 DK	39	struct net_device *dev = priv->ndev;
ef96b5c9	40	struct airport *card = priv->card;
1da177e4 LT	41	unsigned long flags;
	42	int err;
	43
	44	printk(KERN_DEBUG "%s: Airport entering sleep mode\n", dev->name);
	45
	46	err = orinoco_lock(priv, &flags);
	47	if (err) {
	48	printk(KERN_ERR "%s: hw_unavailable on PBOOK_SLEEP_NOW\n",
	49	dev->name);
	50	return 0;
	51	}
	52
6415f7df	53	orinoco_down(priv);
1da177e4 LT	54	orinoco_unlock(priv, &flags);
1da177e4 LT	55
ef96b5c9	56	disable_irq(card->irq);
d14c7c1d AB	57	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
d14c7c1d AB	58	macio_get_of_node(mdev), 0, 0);
1da177e4 LT	59
	60	return 0;
	61	}
	62
	63	static int
	64	airport_resume(struct macio_dev *mdev)
	65	{
a2608362 DK	66	struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev);
a2608362 DK	67	struct net_device *dev = priv->ndev;
ef96b5c9	68	struct airport *card = priv->card;
1da177e4 LT	69	unsigned long flags;
	70	int err;
	71
	72	printk(KERN_DEBUG "%s: Airport waking up\n", dev->name);
	73
d14c7c1d AB	74	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
d14c7c1d AB	75	macio_get_of_node(mdev), 0, 1);
1da177e4 LT	76	msleep(200);
1da177e4 LT	77
ef96b5c9	78	enable_irq(card->irq);
1da177e4	79
bcad6e80	80	priv->hw.ops->lock_irqsave(&priv->lock, &flags);
6415f7df	81	err = orinoco_up(priv);
bcad6e80	82	priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
1da177e4	83
6415f7df	84	return err;
1da177e4 LT	85	}
	86
	87	static int
	88	airport_detach(struct macio_dev *mdev)
	89	{
a2608362	90	struct orinoco_private *priv = dev_get_drvdata(&mdev->ofdev.dev);
1da177e4 LT	91	struct airport *card = priv->card;
	92
	93	if (card->ndev_registered)
5381956b	94	orinoco_if_del(priv);
1da177e4 LT	95	card->ndev_registered = 0;
	96
	97	if (card->irq_requested)
ef96b5c9	98	free_irq(card->irq, priv);
1da177e4 LT	99	card->irq_requested = 0;
	100
	101	if (card->vaddr)
	102	iounmap(card->vaddr);
	103	card->vaddr = NULL;
	104
	105	macio_release_resource(mdev, 0);
	106
d14c7c1d AB	107	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
d14c7c1d AB	108	macio_get_of_node(mdev), 0, 0);
1da177e4 LT	109	ssleep(1);
	110
	111	macio_set_drvdata(mdev, NULL);
a2608362	112	free_orinocodev(priv);
1da177e4 LT	113
	114	return 0;
	115	}
	116
	117	static int airport_hard_reset(struct orinoco_private *priv)
	118	{
	119	/* It would be nice to power cycle the Airport for a real hard
	120	* reset, but for some reason although it appears to
	121	* re-initialize properly, it falls in a screaming heap
	122	* shortly afterwards. */
	123	#if 0
1da177e4 LT	124	struct airport *card = priv->card;
	125
	126	/* Vitally important. If we don't do this it seems we get an
	127	* interrupt somewhere during the power cycle, since
	128	* hw_unavailable is already set it doesn't get ACKed, we get
59c51591	129	* into an interrupt loop and the PMU decides to turn us
1da177e4	130	* off. */
ef96b5c9	131	disable_irq(card->irq);
1da177e4	132
d14c7c1d AB	133	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
d14c7c1d AB	134	macio_get_of_node(card->mdev), 0, 0);
1da177e4	135	ssleep(1);
d14c7c1d AB	136	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
d14c7c1d AB	137	macio_get_of_node(card->mdev), 0, 1);
1da177e4 LT	138	ssleep(1);
1da177e4 LT	139
ef96b5c9	140	enable_irq(card->irq);
1da177e4 LT	141	ssleep(1);
	142	#endif
	143
	144	return 0;
	145	}
	146
	147	static int
5e655772	148	airport_attach(struct macio_dev mdev, const struct of_device_id match)
1da177e4 LT	149	{
1da177e4 LT	150	struct orinoco_private *priv;
1da177e4 LT	151	struct airport *card;
	152	unsigned long phys_addr;
	153	hermes_t *hw;
	154
	155	if (macio_resource_count(mdev) < 1 \|\| macio_irq_count(mdev) < 1) {
	156	printk(KERN_ERR PFX "Wrong interrupt/addresses in OF tree\n");
	157	return -ENODEV;
	158	}
	159
	160	/* Allocate space for private device-specific data */
a2608362 DK	161	priv = alloc_orinocodev(sizeof(*card), &mdev->ofdev.dev,
	162	airport_hard_reset, NULL);
	163	if (!priv) {
1da177e4 LT	164	printk(KERN_ERR PFX "Cannot allocate network device\n");
	165	return -ENODEV;
	166	}
1da177e4 LT	167	card = priv->card;
	168
	169	hw = &priv->hw;
	170	card->mdev = mdev;
	171
5381956b	172	if (macio_request_resource(mdev, 0, DRIVER_NAME)) {
1da177e4	173	printk(KERN_ERR PFX "can't request IO resource !\n");
a2608362	174	free_orinocodev(priv);
1da177e4 LT	175	return -EBUSY;
	176	}
	177
a2608362	178	macio_set_drvdata(mdev, priv);
1da177e4 LT	179
1da177e4 LT	180	/* Setup interrupts & base address */
ef96b5c9	181	card->irq = macio_irq(mdev, 0);
1da177e4 LT	182	phys_addr = macio_resource_start(mdev, 0); /* Physical address */
1da177e4 LT	183	printk(KERN_DEBUG PFX "Physical address %lx\n", phys_addr);
1da177e4 LT	184	card->vaddr = ioremap(phys_addr, AIRPORT_IO_LEN);
	185	if (!card->vaddr) {
	186	printk(KERN_ERR PFX "ioremap() failed\n");
	187	goto failed;
	188	}
	189
	190	hermes_struct_init(hw, card->vaddr, HERMES_16BIT_REGSPACING);
d14c7c1d	191
1da177e4	192	/* Power up card */
d14c7c1d AB	193	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE,
d14c7c1d AB	194	macio_get_of_node(mdev), 0, 1);
1da177e4 LT	195	ssleep(1);
	196
	197	/* Reset it before we get the interrupt */
b42f2074	198	hw->ops->init(hw);
1da177e4	199
ef96b5c9 DK	200	if (request_irq(card->irq, orinoco_interrupt, 0, DRIVER_NAME, priv)) {
ef96b5c9 DK	201	printk(KERN_ERR PFX "Couldn't get IRQ %d\n", card->irq);
1da177e4 LT	202	goto failed;
	203	}
	204	card->irq_requested = 1;
	205
8e638267 DK	206	/* Initialise the main driver */
	207	if (orinoco_init(priv) != 0) {
	208	printk(KERN_ERR PFX "orinoco_init() failed\n");
	209	goto failed;
	210	}
	211
5381956b	212	/* Register an interface with the stack */
593ef09c	213	if (orinoco_if_add(priv, phys_addr, card->irq, NULL) != 0) {
5381956b	214	printk(KERN_ERR PFX "orinoco_if_add() failed\n");
1da177e4 LT	215	goto failed;
1da177e4 LT	216	}
1da177e4 LT	217	card->ndev_registered = 1;
	218	return 0;
	219	failed:
	220	airport_detach(mdev);
	221	return -ENODEV;
	222	} /* airport_attach */
	223
	224
	225	static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
	226	" (Benjamin Herrenschmidt <benh@kernel.crashing.org>)";
	227	MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
	228	MODULE_DESCRIPTION("Driver for the Apple Airport wireless card.");
	229	MODULE_LICENSE("Dual MPL/GPL");
	230
d14c7c1d	231	static struct of_device_id airport_match[] =
1da177e4 LT	232	{
	233	{
	234	.name = "radio",
1da177e4 LT	235	},
	236	{},
	237	};
	238
d14c7c1d	239	MODULE_DEVICE_TABLE(of, airport_match);
5e655772	240
d14c7c1d	241	static struct macio_driver airport_driver = {
c2cdf6ab BH	242	.driver = {
	243	.name = DRIVER_NAME,
	244	.owner = THIS_MODULE,
	245	.of_match_table = airport_match,
	246	},
1da177e4 LT	247	.probe = airport_attach,
	248	.remove = airport_detach,
	249	.suspend = airport_suspend,
	250	.resume = airport_resume,
	251	};
	252
	253	static int __init
	254	init_airport(void)
	255	{
	256	printk(KERN_DEBUG "%s\n", version);
	257
	258	return macio_register_driver(&airport_driver);
	259	}
	260
	261	static void __exit
	262	exit_airport(void)
	263	{
d070d855	264	macio_unregister_driver(&airport_driver);
1da177e4 LT	265	}
	266
	267	module_init(init_airport);
	268	module_exit(exit_airport);