[net-next-2.6.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 txentry_desc *txdesc)
{
	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;

	/*
	 * 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;
	}

	/*
	 * Add the requested extra tx headroom in front of the skb.
	 */
	skb_push(entry->skb, rt2x00dev->ops->extra_tx_headroom);
	memset(entry->skb->data, 0, rt2x00dev->ops->extra_tx_headroom);

	/*
	 * Call the driver's write_tx_datadesc function, if it exists.
	 */
	if (rt2x00dev->ops->lib->write_tx_datadesc)
		rt2x00dev->ops->lib->write_tx_datadesc(entry, txdesc);

	/*
	 * Map the skb to DMA.
	 */
	if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags))
		rt2x00queue_map_txskb(rt2x00dev, entry->skb);

	return 0;
}
EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data);

/*
 * TX/RX data handlers.
 */
void rt2x00pci_txdone(struct queue_entry *entry,
		      struct txdone_entry_desc *txdesc)
{
	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);

	/*
	 * Unmap the skb.
	 */
	rt2x00queue_unmap_skb(rt2x00dev, entry->skb);

	/*
	 * Remove the extra tx headroom from the skb.
	 */
	skb_pull(entry->skb, rt2x00dev->ops->extra_tx_headroom);

	/*
	 * Signal that the TX descriptor is no longer in the skb.
	 */
	skbdesc->flags &= ~SKBDESC_DESC_IN_SKB;

	/*
	 * Pass on to rt2x00lib.
	 */
	rt2x00lib_txdone(entry, txdesc);
}
EXPORT_SYMBOL_GPL(rt2x00pci_txdone);

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(rt2x00dev->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);

	if (pci_dev->is_pcie)
		rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
	else
		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	*/
41086693 HS	66	int rt2x00pci_write_tx_data(struct queue_entry *entry,
41086693 HS	67	struct txentry_desc *txdesc)
95ea3627	68	{
798b7adb	69	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
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
0b8004aa GW	84	/*
	85	* Add the requested extra tx headroom in front of the skb.
	86	*/
	87	skb_push(entry->skb, rt2x00dev->ops->extra_tx_headroom);
	88	memset(entry->skb->data, 0, rt2x00dev->ops->extra_tx_headroom);
	89
baaffe67 GW	90	/*
	91	* Call the driver's write_tx_datadesc function, if it exists.
	92	*/
	93	if (rt2x00dev->ops->lib->write_tx_datadesc)
	94	rt2x00dev->ops->lib->write_tx_datadesc(entry, txdesc);
	95
0b8004aa GW	96	/*
	97	* Map the skb to DMA.
	98	*/
	99	if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags))
	100	rt2x00queue_map_txskb(rt2x00dev, entry->skb);
	101
95ea3627 ID	102	return 0;
	103	}
	104	EXPORT_SYMBOL_GPL(rt2x00pci_write_tx_data);
	105
	106	/*
3957ccb5	107	* TX/RX data handlers.
95ea3627	108	*/
0b8004aa GW	109	void rt2x00pci_txdone(struct queue_entry *entry,
	110	struct txdone_entry_desc *txdesc)
	111	{
	112	struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
	113	struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
	114
	115	/*
	116	* Unmap the skb.
	117	*/
	118	rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
	119
	120	/*
	121	* Remove the extra tx headroom from the skb.
	122	*/
	123	skb_pull(entry->skb, rt2x00dev->ops->extra_tx_headroom);
	124
	125	/*
	126	* Signal that the TX descriptor is no longer in the skb.
	127	*/
	128	skbdesc->flags &= ~SKBDESC_DESC_IN_SKB;
	129
	130	/*
	131	* Pass on to rt2x00lib.
	132	*/
	133	rt2x00lib_txdone(entry, txdesc);
	134	}
	135	EXPORT_SYMBOL_GPL(rt2x00pci_txdone);
	136
95ea3627 ID	137	void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev)
95ea3627 ID	138	{
181d6902 ID	139	struct data_queue *queue = rt2x00dev->rx;
181d6902 ID	140	struct queue_entry *entry;
b8be63ff	141	struct queue_entry_priv_pci *entry_priv;
c4da0048	142	struct skb_frame_desc *skbdesc;
95ea3627 ID	143
95ea3627 ID	144	while (1) {
181d6902	145	entry = rt2x00queue_get_entry(queue, Q_INDEX);
b8be63ff	146	entry_priv = entry->priv_data;
95ea3627	147
798b7adb	148	if (rt2x00dev->ops->lib->get_entry_state(entry))
95ea3627 ID	149	break;
95ea3627 ID	150
c4da0048 GW	151	/*
	152	* Fill in desc fields of the skb descriptor
	153	*/
	154	skbdesc = get_skb_frame_desc(entry->skb);
	155	skbdesc->desc = entry_priv->desc;
	156	skbdesc->desc_len = entry->queue->desc_size;
	157
	158	/*
	159	* Send the frame to rt2x00lib for further processing.
	160	*/
	161	rt2x00lib_rxdone(rt2x00dev, entry);
95ea3627 ID	162	}
	163	}
	164	EXPORT_SYMBOL_GPL(rt2x00pci_rxdone);
	165
	166	/*
	167	* Device initialization handlers.
	168	*/
181d6902 ID	169	static int rt2x00pci_alloc_queue_dma(struct rt2x00_dev *rt2x00dev,
181d6902 ID	170	struct data_queue *queue)
95ea3627	171	{
b8be63ff	172	struct queue_entry_priv_pci *entry_priv;
30b3a23c ID	173	void *addr;
30b3a23c ID	174	dma_addr_t dma;
95ea3627 ID	175	unsigned int i;
	176
	177	/*
	178	* Allocate DMA memory for descriptor and buffer.
	179	*/
c4da0048 GW	180	addr = dma_alloc_coherent(rt2x00dev->dev,
	181	queue->limit * queue->desc_size,
	182	&dma, GFP_KERNEL \| GFP_DMA);
30b3a23c	183	if (!addr)
95ea3627 ID	184	return -ENOMEM;
95ea3627 ID	185
c4da0048	186	memset(addr, 0, queue->limit * queue->desc_size);
9c9dd2c9	187
95ea3627	188	/*
181d6902	189	* Initialize all queue entries to contain valid addresses.
95ea3627	190	*/
181d6902	191	for (i = 0; i < queue->limit; i++) {
b8be63ff	192	entry_priv = queue->entries[i].priv_data;
c4da0048 GW	193	entry_priv->desc = addr + i * queue->desc_size;
c4da0048 GW	194	entry_priv->desc_dma = dma + i * queue->desc_size;
95ea3627 ID	195	}
	196
	197	return 0;
	198	}
	199
181d6902 ID	200	static void rt2x00pci_free_queue_dma(struct rt2x00_dev *rt2x00dev,
181d6902 ID	201	struct data_queue *queue)
95ea3627	202	{
b8be63ff ID	203	struct queue_entry_priv_pci *entry_priv =
b8be63ff ID	204	queue->entries[0].priv_data;
181d6902	205
c4da0048 GW	206	if (entry_priv->desc)
	207	dma_free_coherent(rt2x00dev->dev,
	208	queue->limit * queue->desc_size,
	209	entry_priv->desc, entry_priv->desc_dma);
	210	entry_priv->desc = NULL;
95ea3627 ID	211	}
	212
	213	int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev)
	214	{
181d6902	215	struct data_queue *queue;
95ea3627 ID	216	int status;
	217
	218	/*
	219	* Allocate DMA
	220	*/
181d6902 ID	221	queue_for_each(rt2x00dev, queue) {
181d6902 ID	222	status = rt2x00pci_alloc_queue_dma(rt2x00dev, queue);
95ea3627 ID	223	if (status)
	224	goto exit;
	225	}
	226
	227	/*
	228	* Register interrupt handler.
	229	*/
440ddada ID	230	status = request_irq(rt2x00dev->irq, rt2x00dev->ops->lib->irq_handler,
440ddada ID	231	IRQF_SHARED, rt2x00dev->name, rt2x00dev);
95ea3627 ID	232	if (status) {
95ea3627 ID	233	ERROR(rt2x00dev, "IRQ %d allocation failed (error %d).\n",
440ddada	234	rt2x00dev->irq, status);
b30cdfc5	235	goto exit;
95ea3627 ID	236	}
	237
	238	return 0;
	239
	240	exit:
b30cdfc5 ID	241	queue_for_each(rt2x00dev, queue)
b30cdfc5 ID	242	rt2x00pci_free_queue_dma(rt2x00dev, queue);
95ea3627 ID	243
	244	return status;
	245	}
	246	EXPORT_SYMBOL_GPL(rt2x00pci_initialize);
	247
	248	void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev)
	249	{
181d6902	250	struct data_queue *queue;
95ea3627 ID	251
	252	/*
	253	* Free irq line.
	254	*/
52a9bd2a	255	free_irq(rt2x00dev->irq, rt2x00dev);
95ea3627 ID	256
	257	/*
	258	* Free DMA
	259	*/
181d6902 ID	260	queue_for_each(rt2x00dev, queue)
181d6902 ID	261	rt2x00pci_free_queue_dma(rt2x00dev, queue);
95ea3627 ID	262	}
	263	EXPORT_SYMBOL_GPL(rt2x00pci_uninitialize);
	264
	265	/*
	266	* PCI driver handlers.
	267	*/
	268	static void rt2x00pci_free_reg(struct rt2x00_dev *rt2x00dev)
	269	{
	270	kfree(rt2x00dev->rf);
	271	rt2x00dev->rf = NULL;
	272
	273	kfree(rt2x00dev->eeprom);
	274	rt2x00dev->eeprom = NULL;
	275
21795094 ID	276	if (rt2x00dev->csr.base) {
	277	iounmap(rt2x00dev->csr.base);
	278	rt2x00dev->csr.base = NULL;
95ea3627 ID	279	}
	280	}
	281
	282	static int rt2x00pci_alloc_reg(struct rt2x00_dev *rt2x00dev)
	283	{
14a3bf89	284	struct pci_dev *pci_dev = to_pci_dev(rt2x00dev->dev);
95ea3627	285
275f165f	286	rt2x00dev->csr.base = pci_ioremap_bar(pci_dev, 0);
21795094	287	if (!rt2x00dev->csr.base)
95ea3627 ID	288	goto exit;
	289
	290	rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
	291	if (!rt2x00dev->eeprom)
	292	goto exit;
	293
	294	rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
	295	if (!rt2x00dev->rf)
	296	goto exit;
	297
	298	return 0;
	299
	300	exit:
	301	ERROR_PROBE("Failed to allocate registers.\n");
	302
	303	rt2x00pci_free_reg(rt2x00dev);
	304
	305	return -ENOMEM;
	306	}
	307
	308	int rt2x00pci_probe(struct pci_dev pci_dev, const struct pci_device_id id)
	309	{
	310	struct rt2x00_ops ops = (struct rt2x00_ops )id->driver_data;
	311	struct ieee80211_hw *hw;
	312	struct rt2x00_dev *rt2x00dev;
	313	int retval;
	314
	315	retval = pci_request_regions(pci_dev, pci_name(pci_dev));
	316	if (retval) {
	317	ERROR_PROBE("PCI request regions failed.\n");
	318	return retval;
	319	}
	320
	321	retval = pci_enable_device(pci_dev);
	322	if (retval) {
	323	ERROR_PROBE("Enable device failed.\n");
	324	goto exit_release_regions;
	325	}
	326
	327	pci_set_master(pci_dev);
	328
	329	if (pci_set_mwi(pci_dev))
	330	ERROR_PROBE("MWI not available.\n");
	331
284901a9	332	if (dma_set_mask(&pci_dev->dev, DMA_BIT_MASK(32))) {
95ea3627 ID	333	ERROR_PROBE("PCI DMA not supported.\n");
	334	retval = -EIO;
	335	goto exit_disable_device;
	336	}
	337
	338	hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
	339	if (!hw) {
	340	ERROR_PROBE("Failed to allocate hardware.\n");
	341	retval = -ENOMEM;
	342	goto exit_disable_device;
	343	}
	344
	345	pci_set_drvdata(pci_dev, hw);
	346
	347	rt2x00dev = hw->priv;
14a3bf89	348	rt2x00dev->dev = &pci_dev->dev;
95ea3627 ID	349	rt2x00dev->ops = ops;
95ea3627 ID	350	rt2x00dev->hw = hw;
440ddada ID	351	rt2x00dev->irq = pci_dev->irq;
	352	rt2x00dev->name = pci_name(pci_dev);
	353
6e1fdd11 GW	354	if (pci_dev->is_pcie)
	355	rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
	356	else
	357	rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI);
2015d192	358
95ea3627 ID	359	retval = rt2x00pci_alloc_reg(rt2x00dev);
	360	if (retval)
	361	goto exit_free_device;
	362
	363	retval = rt2x00lib_probe_dev(rt2x00dev);
	364	if (retval)
	365	goto exit_free_reg;
	366
	367	return 0;
	368
	369	exit_free_reg:
	370	rt2x00pci_free_reg(rt2x00dev);
	371
	372	exit_free_device:
	373	ieee80211_free_hw(hw);
	374
	375	exit_disable_device:
	376	if (retval != -EBUSY)
	377	pci_disable_device(pci_dev);
	378
	379	exit_release_regions:
	380	pci_release_regions(pci_dev);
	381
	382	pci_set_drvdata(pci_dev, NULL);
	383
	384	return retval;
	385	}
	386	EXPORT_SYMBOL_GPL(rt2x00pci_probe);
	387
	388	void rt2x00pci_remove(struct pci_dev *pci_dev)
	389	{
	390	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
	391	struct rt2x00_dev *rt2x00dev = hw->priv;
	392
	393	/*
	394	* Free all allocated data.
	395	*/
	396	rt2x00lib_remove_dev(rt2x00dev);
	397	rt2x00pci_free_reg(rt2x00dev);
	398	ieee80211_free_hw(hw);
	399
	400	/*
	401	* Free the PCI device data.
	402	*/
	403	pci_set_drvdata(pci_dev, NULL);
	404	pci_disable_device(pci_dev);
	405	pci_release_regions(pci_dev);
	406	}
	407	EXPORT_SYMBOL_GPL(rt2x00pci_remove);
	408
	409	#ifdef CONFIG_PM
	410	int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state)
	411	{
	412	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
	413	struct rt2x00_dev *rt2x00dev = hw->priv;
	414	int retval;
	415
	416	retval = rt2x00lib_suspend(rt2x00dev, state);
	417	if (retval)
	418	return retval;
	419
95ea3627 ID	420	pci_save_state(pci_dev);
	421	pci_disable_device(pci_dev);
	422	return pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
	423	}
	424	EXPORT_SYMBOL_GPL(rt2x00pci_suspend);
	425
	426	int rt2x00pci_resume(struct pci_dev *pci_dev)
	427	{
	428	struct ieee80211_hw *hw = pci_get_drvdata(pci_dev);
	429	struct rt2x00_dev *rt2x00dev = hw->priv;
95ea3627 ID	430
	431	if (pci_set_power_state(pci_dev, PCI_D0) \|\|
	432	pci_enable_device(pci_dev) \|\|
	433	pci_restore_state(pci_dev)) {
	434	ERROR(rt2x00dev, "Failed to resume device.\n");
	435	return -EIO;
	436	}
	437
499a214c	438	return rt2x00lib_resume(rt2x00dev);
95ea3627 ID	439	}
	440	EXPORT_SYMBOL_GPL(rt2x00pci_resume);
	441	#endif /* CONFIG_PM */
	442
	443	/*
	444	* rt2x00pci module information.
	445	*/
	446	MODULE_AUTHOR(DRV_PROJECT);
	447	MODULE_VERSION(DRV_VERSION);
181d6902	448	MODULE_DESCRIPTION("rt2x00 pci library");
95ea3627	449	MODULE_LICENSE("GPL");