[linux-2.6-block.git] / drivers / net / wireless / rt2x00 / rt2x00pci.c

/*
	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
	<http://rt2x00.serialmonkey.com>

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the
	Free Software Foundation, Inc.,
	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*
	Module: rt2x00pci
	Abstract: rt2x00 generic pci device routines.
 */

#include <linux/dma-mapping.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>

#include "rt2x00.h"
#include "rt2x00pci.h"

/*
 * Register access.
 */
int rt2x00pci_regbusy_read(struct rt2x00_dev *rt2x00dev,
			   const unsigned int offset,
			   const struct rt2x00_field32 field,
			   u32 *reg)
{
	unsigned int i;

	if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
		return 0;

	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
		rt2x00pci_register_read(rt2x00dev, offset, reg);
		if (!rt2x00_get_field32(*reg, field))
			return 1;
		udelay(REGISTER_BUSY_DELAY);
	}

	ERROR(rt2x00dev, "Indirect register access failed: "
	      "offset=0x%.08x, value=0x%.08x\n", offset, *reg);
	*reg = ~0;

	return 0;
}
EXPORT_SYMBOL_GPL(rt2x00pci_regbusy_read);

/*
 * TX data handlers.
 */
int rt2x00pci_write_tx_data(struct queue_entry *entry)
{
	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
	struct queue_entry_priv_pci *entry_priv = entry->priv_data;
	struct skb_frame_desc *skbdesc;

	/*
	 * This should not happen, we already checked the entry
	 * was ours. When the hardware disagrees there has been
	 * a queue corruption!
	 */
	if (unlikely(rt2x00dev->ops->lib->get_entry_state(entry))) {
		ERROR(rt2x00dev,
		      "Corrupt queue %d, accessing entry which is not ours.\n"
		      "Please file bug report to %s.\n",
		      entry->queue->qid, DRV_PROJECT);
		return -EINVAL;
	}

	/*
	 * Fill in skb descriptor
	 */
	skbdesc = get_skb_frame_desc(entry->skb);
	skbdesc->desc = entry_priv->desc;
	skbdesc->desc_len = entry->queue->desc_size;

	return 0;
}
EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data);

/*
 * TX/RX data handlers.
 */
void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev)
{
	struct data_queue *queue = rt2x00dev->rx;
	struct queue_entry *entry;
	struct queue_entry_priv_pci *entry_priv;
	struct skb_frame_desc *skbdesc;

	while (1) {
		entry = rt2x00queue_get_entry(queue, Q_INDEX);
		entry_priv = entry->priv_data;

		if (rt2x00dev->ops->lib->get_entry_state(entry))
			break;

		/*
		 * Fill in desc fields of the skb descriptor
		 */
		skbdesc = get_skb_frame_desc(entry->skb);
		skbdesc->desc = entry_priv->desc;
		skbdesc->desc_len = entry->queue->desc_size;

		/*
		 * Send the frame to rt2x00lib for further processing.
		 */
		rt2x00lib_rxdone(rt2x00dev, entry);
	}
}
EXPORT_SYMBOL_GPL(rt2x00pci_rxdone);

/*
 * Device initialization handlers.
 */
static int rt2x00pci_alloc_queue_dma(struct rt2x00_dev *rt2x00dev,
				     struct data_queue *queue)
{
	struct queue_entry_priv_pci *entry_priv;
	void *addr;
	dma_addr_t dma;
	unsigned int i;

	/*
	 * Allocate DMA memory for descriptor and buffer.
	 */
	addr = dma_alloc_coherent(rt2x00dev->dev,
				  queue->limit * queue->desc_size,
				  &dma, GFP_KERNEL | GFP_DMA);
	if (!addr)
		return -ENOMEM;

	memset(addr, 0, queue->limit * queue->desc_size);

	/*
	 * Initialize all queue entries to contain valid addresses.
	 */
	for (i = 0; i < queue->limit; i++) {
		entry_priv = queue->entries[i].priv_data;
		entry_priv->desc = addr + i * queue->desc_size;
		entry_priv->desc_dma = dma + i * queue->desc_size;
	}

	return 0;
}

static void rt2x00pci_free_queue_dma(struct rt2x00_dev *rt2x00dev,
				     struct data_queue *queue)
{
	struct queue_entry_priv_pci *entry_priv =
	    queue->entries[0].priv_data;

	if (entry_priv->desc)
		dma_free_coherent(rt2x00dev->dev,
				  queue->limit * queue->desc_size,
				  entry_priv->desc, entry_priv->desc_dma);
	entry_priv->desc = NULL;
}

int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev)
{
	struct data_queue *queue;
	int status;

	/*
	 * Allocate DMA
	 */
	queue_for_each(rt2x00dev, queue) {
		status = rt2x00pci_alloc_queue_dma(rt2x00dev, queue);
		if (status)
			goto exit;
	}

	/*
	 * Register interrupt handler.
	 */
	status = request_irq(rt2x00dev->irq, rt2x00dev->ops->lib->irq_handler,
			     IRQF_SHARED, rt2x00dev->name, rt2x00dev);
	if (status) {
		ERROR(rt2x00dev, "IRQ %d allocation failed (error %d).\n",
		      rt2x00dev->irq, status);
		goto exit;
	}

	return 0;

exit:
	queue_for_each(rt2x00dev, queue)
		rt2x00pci_free_queue_dma(rt2x00dev, queue);

	return status;
}
EXPORT_SYMBOL_GPL(rt2x00pci_initialize);

void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev)
{
	struct data_queue *queue;

	/*
	 * Free irq line.
	 */
	free_irq(to_pci_dev(rt2x00dev->dev)->irq, rt2x00dev);

	/*
	 * Free DMA
	 */
	queue_for_each(rt2x00dev, queue)
		rt2x00pci_free_queue_dma(rt2x00dev, queue);
}
EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize);

/*
 * PCI driver handlers.
 */
static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
{
	kfree(rt2x00dev->rf);
	rt2x00dev->rf = NULL;

	kfree(rt2x00dev->eeprom);
	rt2x00dev->eeprom = NULL;

	if (rt2x00dev->csr.base) {
		iounmap(rt2x00dev->csr.base);
		rt2x00dev->csr.base = NULL;
	}
}

static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
{
	struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);

	rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
	if (!rt2x00dev->csr.base)
		goto exit;

	rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
	if (!rt2x00dev->eeprom)
		goto exit;

	rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
	if (!rt2x00dev->rf)
		goto exit;

	return 0;

exit:
	ERROR_PROBE("Failed to allocate registers.\n");

	rt2x00pci_free_reg(rt2x00dev);

	return -ENOMEM;
}

int rt2x00pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id)
{
	struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_data;
	struct ieee80211_hw *hw;
	struct rt2x00_dev *rt2x00dev;
	int retval;

	retval = pci_request_regions(pci_dev, pci_name(pci_dev));
	if (retval) {
		ERROR_PROBE("PCI request regions failed.\n");
		return retval;
	}

	retval = pci_enable_device(pci_dev);
	if (retval) {
		ERROR_PROBE("Enable device failed.\n");
		goto exit_release_regions;
	}

	pci_set_master(pci_dev);

	if (pci_set_mwi(pci_dev))
		ERROR_PROBE("MWI not available.\n");

	if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
		ERROR_PROBE("PCI DMA not supported.\n");
		retval = -EIO;
		goto exit_disable_device;
	}

	hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
	if (!hw) {
		ERROR_PROBE("Failed to allocate hardware.\n");
		retval = -ENOMEM;
		goto exit_disable_device;
	}

	pci_set_drvdata(pci_dev, hw);

	rt2x00dev = hw->priv;
	rt2x00dev->dev = &pci_dev->dev;
	rt2x00dev->ops = ops;
	rt2x00dev->hw = hw;
	rt2x00dev->irq = pci_dev->irq;
	rt2x00dev->name = pci_name(pci_dev);

	rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);

	retval = rt2x00pci_alloc_reg(rt2x00dev);
	if (retval)
		goto exit_free_device;

	retval = rt2x00lib_probe_dev(rt2x00dev);
	if (retval)
		goto exit_free_reg;

	return 0;

exit_free_reg:
	rt2x00pci_free_reg(rt2x00dev);

exit_free_device:
	ieee80211_free_hw(hw);

exit_disable_device:
	if (retval != -EBUSY)
		pci_disable_device(pci_dev);

exit_release_regions:
	pci_release_regions(pci_dev);

	pci_set_drvdata(pci_dev, NULL);

	return retval;
}
EXPORT_SYMBOL_GPL(rt2x00pci_probe);

void rt2x00pci_remove(struct pci_dev *pci_dev)
{
	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
	struct rt2x00_dev *rt2x00dev = hw->priv;

	/*
	 * Free all allocated data.
	 */
	rt2x00lib_remove_dev(rt2x00dev);
	rt2x00pci_free_reg(rt2x00dev);
	ieee80211_free_hw(hw);

	/*
	 * Free the PCI device data.
	 */
	pci_set_drvdata(pci_dev, NULL);
	pci_disable_device(pci_dev);
	pci_release_regions(pci_dev);
}
EXPORT_SYMBOL_GPL(rt2x00pci_remove);

#ifdef CONFIG_PM
int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
{
	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
	struct rt2x00_dev *rt2x00dev = hw->priv;
	int retval;

	retval = rt2x00lib_suspend(rt2x00dev, state);
	if (retval)
		return retval;

	pci_save_state(pci_dev);
	pci_disable_device(pci_dev);
	return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
}
EXPORT_SYMBOL_GPL(rt2x00pci_suspend);

int rt2x00pci_resume(struct pci_dev *pci_dev)
{
	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
	struct rt2x00_dev *rt2x00dev = hw->priv;

	if (pci_set_power_state(pci_dev, PCI_D0) ||
	    pci_enable_device(pci_dev) ||
	    pci_restore_state(pci_dev)) {
		ERROR(rt2x00dev, "Failed to resume device.\n");
		return -EIO;
	}

	return rt2x00lib_resume(rt2x00dev);
}
EXPORT_SYMBOL_GPL(rt2x00pci_resume);
#endif /* CONFIG_PM */

/*
 * rt2x00pci module information.
 */
MODULE_AUTHOR(DRV_PROJECT);
MODULE_VERSION(DRV_VERSION);
MODULE_DESCRIPTION("rt2x00 pci library");
MODULE_LICENSE("GPL");
Commit	Line	Data
95ea3627	1	/*
9c9a0d14	2	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
95ea3627 ID	3	<http://rt2x00.serialmonkey.com>
	4
	5	This program is free software; you can redistribute it and/or modify
	6	it under the terms of the GNU General Public License as published by
	7	the Free Software Foundation; either version 2 of the License, or
	8	(at your option) any later version.
	9
	10	This program is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	GNU General Public License for more details.
	14
	15	You should have received a copy of the GNU General Public License
	16	along with this program; if not, write to the
	17	Free Software Foundation, Inc.,
	18	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	19	*/
	20
	21	/*
	22	Module: rt2x00pci
	23	Abstract: rt2x00 generic pci device routines.
	24	*/
	25
95ea3627 ID	26	#include <linux/dma-mapping.h>
	27	#include <linux/kernel.h>
	28	#include <linux/module.h>
	29	#include <linux/pci.h>
5a0e3ad6	30	#include <linux/slab.h>
95ea3627 ID	31
	32	#include "rt2x00.h"
	33	#include "rt2x00pci.h"
	34
c9c3b1a5 ID	35	/*
	36	* Register access.
	37	*/
	38	int rt2x00pci_regbusy_read(struct rt2x00_dev *rt2x00dev,
	39	const unsigned int offset,
	40	const struct rt2x00_field32 field,
	41	u32 *reg)
	42	{
	43	unsigned int i;
	44
c70762f9 AB	45	if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
	46	return 0;
	47
c9c3b1a5 ID	48	for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
	49	rt2x00pci_register_read(rt2x00dev, offset, reg);
	50	if (!rt2x00_get_field32(*reg, field))
	51	return 1;
	52	udelay(REGISTER_BUSY_DELAY);
	53	}
	54
	55	ERROR(rt2x00dev, "Indirect register access failed: "
	56	"offset=0x%.08x, value=0x%.08x\n", offset, *reg);
	57	*reg = ~0;
	58
	59	return 0;
	60	}
	61	EXPORT_SYMBOL_GPL(rt2x00pci_regbusy_read);
	62
95ea3627 ID	63	/*
	64	* TX data handlers.
	65	*/
6db3786a	66	int rt2x00pci_write_tx_data(struct queue_entry *entry)
95ea3627	67	{
798b7adb	68	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
b8be63ff	69	struct queue_entry_priv_pci *entry_priv = entry->priv_data;
181d6902	70	struct skb_frame_desc *skbdesc;
95ea3627	71
6db3786a ID	72	/*
	73	* This should not happen, we already checked the entry
	74	* was ours. When the hardware disagrees there has been
	75	* a queue corruption!
	76	*/
798b7adb ID	77	if (unlikely(rt2x00dev->ops->lib->get_entry_state(entry))) {
798b7adb ID	78	ERROR(rt2x00dev,
6db3786a	79	"Corrupt queue %d, accessing entry which is not ours.\n"
95ea3627	80	"Please file bug report to %s.\n",
e58c6aca	81	entry->queue->qid, DRV_PROJECT);
95ea3627 ID	82	return -EINVAL;
	83	}
	84
08992f7f ID	85	/*
	86	* Fill in skb descriptor
	87	*/
6db3786a	88	skbdesc = get_skb_frame_desc(entry->skb);
b8be63ff	89	skbdesc->desc = entry_priv->desc;
6db3786a	90	skbdesc->desc_len = entry->queue->desc_size;
95ea3627	91
95ea3627 ID	92	return 0;
	93	}
	94	EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data);
	95
	96	/*
3957ccb5	97	* TX/RX data handlers.
95ea3627 ID	98	*/
	99	void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev)
	100	{
181d6902 ID	101	struct data_queue *queue = rt2x00dev->rx;
181d6902 ID	102	struct queue_entry *entry;
b8be63ff	103	struct queue_entry_priv_pci *entry_priv;
c4da0048	104	struct skb_frame_desc *skbdesc;
95ea3627 ID	105
95ea3627 ID	106	while (1) {
181d6902	107	entry = rt2x00queue_get_entry(queue, Q_INDEX);
b8be63ff	108	entry_priv = entry->priv_data;
95ea3627	109
798b7adb	110	if (rt2x00dev->ops->lib->get_entry_state(entry))
95ea3627 ID	111	break;
95ea3627 ID	112
c4da0048 GW	113	/*
	114	* Fill in desc fields of the skb descriptor
	115	*/
	116	skbdesc = get_skb_frame_desc(entry->skb);
	117	skbdesc->desc = entry_priv->desc;
	118	skbdesc->desc_len = entry->queue->desc_size;
	119
	120	/*
	121	* Send the frame to rt2x00lib for further processing.
	122	*/
	123	rt2x00lib_rxdone(rt2x00dev, entry);
95ea3627 ID	124	}
	125	}
	126	EXPORT_SYMBOL_GPL(rt2x00pci_rxdone);
	127
	128	/*
	129	* Device initialization handlers.
	130	*/
181d6902 ID	131	static int rt2x00pci_alloc_queue_dma(struct rt2x00_dev *rt2x00dev,
181d6902 ID	132	struct data_queue *queue)
95ea3627	133	{
b8be63ff	134	struct queue_entry_priv_pci *entry_priv;
30b3a23c ID	135	void *addr;
30b3a23c ID	136	dma_addr_t dma;
95ea3627 ID	137	unsigned int i;
	138
	139	/*
	140	* Allocate DMA memory for descriptor and buffer.
	141	*/
c4da0048 GW	142	addr = dma_alloc_coherent(rt2x00dev->dev,
	143	queue->limit * queue->desc_size,
	144	&dma, GFP_KERNEL \| GFP_DMA);
30b3a23c	145	if (!addr)
95ea3627 ID	146	return -ENOMEM;
95ea3627 ID	147
c4da0048	148	memset(addr, 0, queue->limit * queue->desc_size);
9c9dd2c9	149
95ea3627	150	/*
181d6902	151	* Initialize all queue entries to contain valid addresses.
95ea3627	152	*/
181d6902	153	for (i = 0; i < queue->limit; i++) {
b8be63ff	154	entry_priv = queue->entries[i].priv_data;
c4da0048 GW	155	entry_priv->desc = addr + i * queue->desc_size;
c4da0048 GW	156	entry_priv->desc_dma = dma + i * queue->desc_size;
95ea3627 ID	157	}
	158
	159	return 0;
	160	}
	161
181d6902 ID	162	static void rt2x00pci_free_queue_dma(struct rt2x00_dev *rt2x00dev,
181d6902 ID	163	struct data_queue *queue)
95ea3627	164	{
b8be63ff ID	165	struct queue_entry_priv_pci *entry_priv =
b8be63ff ID	166	queue->entries[0].priv_data;
181d6902	167
c4da0048 GW	168	if (entry_priv->desc)
	169	dma_free_coherent(rt2x00dev->dev,
	170	queue->limit * queue->desc_size,
	171	entry_priv->desc, entry_priv->desc_dma);
	172	entry_priv->desc = NULL;
95ea3627 ID	173	}
	174
	175	int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev)
	176	{
181d6902	177	struct data_queue *queue;
95ea3627 ID	178	int status;
	179
	180	/*
	181	* Allocate DMA
	182	*/
181d6902 ID	183	queue_for_each(rt2x00dev, queue) {
181d6902 ID	184	status = rt2x00pci_alloc_queue_dma(rt2x00dev, queue);
95ea3627 ID	185	if (status)
	186	goto exit;
	187	}
	188
	189	/*
	190	* Register interrupt handler.
	191	*/
440ddada ID	192	status = request_irq(rt2x00dev->irq, rt2x00dev->ops->lib->irq_handler,
440ddada ID	193	IRQF_SHARED, rt2x00dev->name, rt2x00dev);
95ea3627 ID	194	if (status) {
95ea3627 ID	195	ERROR(rt2x00dev, "IRQ %d allocation failed (error %d).\n",
440ddada	196	rt2x00dev->irq, status);
b30cdfc5	197	goto exit;
95ea3627 ID	198	}
	199
	200	return 0;
	201
	202	exit:
b30cdfc5 ID	203	queue_for_each(rt2x00dev, queue)
b30cdfc5 ID	204	rt2x00pci_free_queue_dma(rt2x00dev, queue);
95ea3627 ID	205
	206	return status;
	207	}
	208	EXPORT_SYMBOL_GPL(rt2x00pci_initialize);
	209
	210	void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev)
	211	{
181d6902	212	struct data_queue *queue;
95ea3627 ID	213
	214	/*
	215	* Free irq line.
	216	*/
14a3bf89	217	free_irq(to_pci_dev(rt2x00dev->dev)->irq, rt2x00dev);
95ea3627 ID	218
	219	/*
	220	* Free DMA
	221	*/
181d6902 ID	222	queue_for_each(rt2x00dev, queue)
181d6902 ID	223	rt2x00pci_free_queue_dma(rt2x00dev, queue);
95ea3627 ID	224	}
	225	EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize);
	226
	227	/*
	228	* PCI driver handlers.
	229	*/
	230	static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
	231	{
	232	kfree(rt2x00dev->rf);
	233	rt2x00dev->rf = NULL;
	234
	235	kfree(rt2x00dev->eeprom);
	236	rt2x00dev->eeprom = NULL;
	237
21795094 ID	238	if (rt2x00dev->csr.base) {
	239	iounmap(rt2x00dev->csr.base);
	240	rt2x00dev->csr.base = NULL;
95ea3627 ID	241	}
	242	}
	243
	244	static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
	245	{
14a3bf89	246	struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);
95ea3627	247
275f165f	248	rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
21795094	249	if (!rt2x00dev->csr.base)
95ea3627 ID	250	goto exit;
	251
	252	rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
	253	if (!rt2x00dev->eeprom)
	254	goto exit;
	255
	256	rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
	257	if (!rt2x00dev->rf)
	258	goto exit;
	259
	260	return 0;
	261
	262	exit:
	263	ERROR_PROBE("Failed to allocate registers.\n");
	264
	265	rt2x00pci_free_reg(rt2x00dev);
	266
	267	return -ENOMEM;
	268	}
	269
	270	int rt2x00pci_probe(struct pci_dev pci_dev, const struct pci_device_id id)
	271	{
	272	struct rt2x00_ops ops = (struct rt2x00_ops )id->driver_data;
	273	struct ieee80211_hw *hw;
	274	struct rt2x00_dev *rt2x00dev;
	275	int retval;
	276
	277	retval = pci_request_regions(pci_dev, pci_name(pci_dev));
	278	if (retval) {
	279	ERROR_PROBE("PCI request regions failed.\n");
	280	return retval;
	281	}
	282
	283	retval = pci_enable_device(pci_dev);
	284	if (retval) {
	285	ERROR_PROBE("Enable device failed.\n");
	286	goto exit_release_regions;
	287	}
	288
	289	pci_set_master(pci_dev);
	290
	291	if (pci_set_mwi(pci_dev))
	292	ERROR_PROBE("MWI not available.\n");
	293
284901a9	294	if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
95ea3627 ID	295	ERROR_PROBE("PCI DMA not supported.\n");
	296	retval = -EIO;
	297	goto exit_disable_device;
	298	}
	299
	300	hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
	301	if (!hw) {
	302	ERROR_PROBE("Failed to allocate hardware.\n");
	303	retval = -ENOMEM;
	304	goto exit_disable_device;
	305	}
	306
	307	pci_set_drvdata(pci_dev, hw);
	308
	309	rt2x00dev = hw->priv;
14a3bf89	310	rt2x00dev->dev = &pci_dev->dev;
95ea3627 ID	311	rt2x00dev->ops = ops;
95ea3627 ID	312	rt2x00dev->hw = hw;
440ddada ID	313	rt2x00dev->irq = pci_dev->irq;
	314	rt2x00dev->name = pci_name(pci_dev);
	315
2015d192 GW	316	rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
2015d192 GW	317
95ea3627 ID	318	retval = rt2x00pci_alloc_reg(rt2x00dev);
	319	if (retval)
	320	goto exit_free_device;
	321
	322	retval = rt2x00lib_probe_dev(rt2x00dev);
	323	if (retval)
	324	goto exit_free_reg;
	325
	326	return 0;
	327
	328	exit_free_reg:
	329	rt2x00pci_free_reg(rt2x00dev);
	330
	331	exit_free_device:
	332	ieee80211_free_hw(hw);
	333
	334	exit_disable_device:
	335	if (retval != -EBUSY)
	336	pci_disable_device(pci_dev);
	337
	338	exit_release_regions:
	339	pci_release_regions(pci_dev);
	340
	341	pci_set_drvdata(pci_dev, NULL);
	342
	343	return retval;
	344	}
	345	EXPORT_SYMBOL_GPL(rt2x00pci_probe);
	346
	347	void rt2x00pci_remove(struct pci_dev *pci_dev)
	348	{
	349	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
	350	struct rt2x00_dev *rt2x00dev = hw->priv;
	351
	352	/*
	353	* Free all allocated data.
	354	*/
	355	rt2x00lib_remove_dev(rt2x00dev);
	356	rt2x00pci_free_reg(rt2x00dev);
	357	ieee80211_free_hw(hw);
	358
	359	/*
	360	* Free the PCI device data.
	361	*/
	362	pci_set_drvdata(pci_dev, NULL);
	363	pci_disable_device(pci_dev);
	364	pci_release_regions(pci_dev);
	365	}
	366	EXPORT_SYMBOL_GPL(rt2x00pci_remove);
	367
	368	#ifdef CONFIG_PM
	369	int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
	370	{
	371	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
	372	struct rt2x00_dev *rt2x00dev = hw->priv;
	373	int retval;
	374
	375	retval = rt2x00lib_suspend(rt2x00dev, state);
	376	if (retval)
	377	return retval;
	378
95ea3627 ID	379	pci_save_state(pci_dev);
	380	pci_disable_device(pci_dev);
	381	return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
	382	}
	383	EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
	384
	385	int rt2x00pci_resume(struct pci_dev *pci_dev)
	386	{
	387	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
	388	struct rt2x00_dev *rt2x00dev = hw->priv;
95ea3627 ID	389
	390	if (pci_set_power_state(pci_dev, PCI_D0) \|\|
	391	pci_enable_device(pci_dev) \|\|
	392	pci_restore_state(pci_dev)) {
	393	ERROR(rt2x00dev, "Failed to resume device.\n");
	394	return -EIO;
	395	}
	396
499a214c	397	return rt2x00lib_resume(rt2x00dev);
95ea3627 ID	398	}
	399	EXPORT_SYMBOL_GPL(rt2x00pci_resume);
	400	#endif /* CONFIG_PM */
	401
	402	/*
	403	* rt2x00pci module information.
	404	*/
	405	MODULE_AUTHOR(DRV_PROJECT);
	406	MODULE_VERSION(DRV_VERSION);
181d6902	407	MODULE_DESCRIPTION("rt2x00 pci library");
95ea3627	408	MODULE_LICENSE("GPL");