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