path: root/package/mac80211/patches/405-ath9k-move-PCI-code-into-separate-file.patch

From d95e670cd1395ffd8410bed809b6d060f2183d6b Mon Sep 17 00:00:00 2001
From: Gabor Juhos <juhosg@openwrt.org>
Date: Mon, 5 Jan 2009 11:01:09 +0100
Subject: [PATCH 05/11] ath9k: move PCI code into separate file

Now that we have converted all bus specific routines to replaceable, we
can move the PCI specific codes into a separate file.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
---
 drivers/net/wireless/ath9k/Makefile |    1 +
 drivers/net/wireless/ath9k/core.h   |   18 ++-
 drivers/net/wireless/ath9k/main.c   |  299 +++--------------------------------
 drivers/net/wireless/ath9k/pci.c    |  289 +++++++++++++++++++++++++++++++++
 4 files changed, 328 insertions(+), 279 deletions(-)

--- a/drivers/net/wireless/ath9k/Makefile
+++ b/drivers/net/wireless/ath9k/Makefile
@@ -11,6 +11,7 @@ ath9k-y +=	hw.o \
 		xmit.o \
 		rc.o
 
+ath9k-$(CONFIG_PCI) += pci.o
 ath9k-$(CONFIG_ATH9K_DEBUG) += debug.o
 
 obj-$(CONFIG_ATH9K) += ath9k.o
--- a/drivers/net/wireless/ath9k/core.h
+++ b/drivers/net/wireless/ath9k/core.h
@@ -18,7 +18,7 @@
 #define CORE_H
 
 #include <linux/etherdevice.h>
-#include <linux/pci.h>
+#include <linux/device.h>
 #include <net/mac80211.h>
 #include <linux/leds.h>
 #include <linux/rfkill.h>
@@ -766,4 +766,20 @@ static inline void ath_bus_cleanup(struc
 	sc->bus_ops->cleanup(sc);
 }
 
+extern struct ieee80211_ops ath9k_ops;
+
+irqreturn_t ath_isr(int irq, void *dev);
+int ath_attach(u16 devid, struct ath_softc *sc);
+void ath_detach(struct ath_softc *sc);
+const char *ath_mac_bb_name(u32 mac_bb_version);
+const char *ath_rf_name(u16 rf_version);
+
+#ifdef CONFIG_PCI
+int ath_pci_init(void);
+void ath_pci_exit(void);
+#else
+static inline int ath_pci_init(void) { return 0; };
+static inline void ath_pci_exit(void) {};
+#endif
+
 #endif /* CORE_H */
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -28,38 +28,6 @@ MODULE_DESCRIPTION("Support for Atheros 
 MODULE_SUPPORTED_DEVICE("Atheros 802.11n WLAN cards");
 MODULE_LICENSE("Dual BSD/GPL");
 
-static struct pci_device_id ath_pci_id_table[] __devinitdata = {
-	{ PCI_VDEVICE(ATHEROS, 0x0023) }, /* PCI   */
-	{ PCI_VDEVICE(ATHEROS, 0x0024) }, /* PCI-E */
-	{ PCI_VDEVICE(ATHEROS, 0x0027) }, /* PCI   */
-	{ PCI_VDEVICE(ATHEROS, 0x0029) }, /* PCI   */
-	{ PCI_VDEVICE(ATHEROS, 0x002A) }, /* PCI-E */
-	{ PCI_VDEVICE(ATHEROS, 0x002B) }, /* PCI-E */
-	{ 0 }
-};
-
-static void ath_detach(struct ath_softc *sc);
-
-/* return bus cachesize in 4B word units */
-
-static void ath_pci_read_cachesize(struct ath_softc *sc, int *csz)
-{
-	u8 u8tmp;
-
-	pci_read_config_byte(to_pci_dev(sc->dev), PCI_CACHE_LINE_SIZE,
-			     (u8 *)&u8tmp);
-	*csz = (int)u8tmp;
-
-	/*
-	 * This check was put in to avoid "unplesant" consequences if
-	 * the bootrom has not fully initialized all PCI devices.
-	 * Sometimes the cache line size register is not set
-	 */
-
-	if (*csz == 0)
-		*csz = DEFAULT_CACHELINE >> 2;   /* Use the default size */
-}
-
 static void ath_cache_conf_rate(struct ath_softc *sc,
 				struct ieee80211_conf *conf)
 {
@@ -497,7 +465,7 @@ static void ath9k_tasklet(unsigned long 
 	ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_imask);
 }
 
-static irqreturn_t ath_isr(int irq, void *dev)
+irqreturn_t ath_isr(int irq, void *dev)
 {
 	struct ath_softc *sc = dev;
 	struct ath_hal *ah = sc->sc_ah;
@@ -1278,7 +1246,7 @@ static int ath_start_rfkill_poll(struct 
 }
 #endif /* CONFIG_RFKILL */
 
-static void ath_detach(struct ath_softc *sc)
+void ath_detach(struct ath_softc *sc)
 {
 	struct ieee80211_hw *hw = sc->hw;
 	int i = 0;
@@ -1529,7 +1497,7 @@ bad:
 	return error;
 }
 
-static int ath_attach(u16 devid, struct ath_softc *sc)
+int ath_attach(u16 devid, struct ath_softc *sc)
 {
 	struct ieee80211_hw *hw = sc->hw;
 	int error = 0;
@@ -2448,7 +2416,7 @@ static int ath9k_ampdu_action(struct iee
 	return ret;
 }
 
-static struct ieee80211_ops ath9k_ops = {
+struct ieee80211_ops ath9k_ops = {
 	.tx 		    = ath9k_tx,
 	.start 		    = ath9k_start,
 	.stop 		    = ath9k_stop,
@@ -2492,7 +2460,7 @@ static struct {
 /*
  * Return the MAC/BB name. "????" is returned if the MAC/BB is unknown.
  */
-static const char *
+const char *
 ath_mac_bb_name(u32 mac_bb_version)
 {
 	int i;
@@ -2509,7 +2477,7 @@ ath_mac_bb_name(u32 mac_bb_version)
 /*
  * Return the RF name. "????" is returned if the RF is unknown.
  */
-static const char *
+const char *
 ath_rf_name(u16 rf_version)
 {
 	int i;
@@ -2523,236 +2491,7 @@ ath_rf_name(u16 rf_version)
 	return "????";
 }
 
-static void ath_pci_cleanup(struct ath_softc *sc)
-{
-	struct pci_dev *pdev = to_pci_dev(sc->dev);
-
-	ath_detach(sc);
-	if (pdev->irq)
-		free_irq(pdev->irq, sc);
-	pci_iounmap(pdev, sc->mem);
-	pci_release_region(pdev, 0);
-	pci_disable_device(pdev);
-	ieee80211_free_hw(sc->hw);
-}
-
-static struct ath_bus_ops ath_pci_bus_ops = {
-	.read_cachesize = ath_pci_read_cachesize,
-	.cleanup = ath_pci_cleanup,
-};
-
-static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
-{
-	void __iomem *mem;
-	struct ath_softc *sc;
-	struct ieee80211_hw *hw;
-	u8 csz;
-	u32 val;
-	int ret = 0;
-	struct ath_hal *ah;
-
-	if (pci_enable_device(pdev))
-		return -EIO;
-
-	ret =  pci_set_dma_mask(pdev, DMA_32BIT_MASK);
-
-	if (ret) {
-		printk(KERN_ERR "ath9k: 32-bit DMA not available\n");
-		goto bad;
-	}
-
-	ret = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
-
-	if (ret) {
-		printk(KERN_ERR "ath9k: 32-bit DMA consistent "
-			"DMA enable failed\n");
-		goto bad;
-	}
-
-	/*
-	 * Cache line size is used to size and align various
-	 * structures used to communicate with the hardware.
-	 */
-	pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
-	if (csz == 0) {
-		/*
-		 * Linux 2.4.18 (at least) writes the cache line size
-		 * register as a 16-bit wide register which is wrong.
-		 * We must have this setup properly for rx buffer
-		 * DMA to work so force a reasonable value here if it
-		 * comes up zero.
-		 */
-		csz = L1_CACHE_BYTES / sizeof(u32);
-		pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
-	}
-	/*
-	 * The default setting of latency timer yields poor results,
-	 * set it to the value used by other systems. It may be worth
-	 * tweaking this setting more.
-	 */
-	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
-
-	pci_set_master(pdev);
-
-	/*
-	 * Disable the RETRY_TIMEOUT register (0x41) to keep
-	 * PCI Tx retries from interfering with C3 CPU state.
-	 */
-	pci_read_config_dword(pdev, 0x40, &val);
-	if ((val & 0x0000ff00) != 0)
-		pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
-
-	ret = pci_request_region(pdev, 0, "ath9k");
-	if (ret) {
-		dev_err(&pdev->dev, "PCI memory region reserve error\n");
-		ret = -ENODEV;
-		goto bad;
-	}
-
-	mem = pci_iomap(pdev, 0, 0);
-	if (!mem) {
-		printk(KERN_ERR "PCI memory map error\n") ;
-		ret = -EIO;
-		goto bad1;
-	}
-
-	hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
-	if (hw == NULL) {
-		printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n");
-		goto bad2;
-	}
-
-	SET_IEEE80211_DEV(hw, &pdev->dev);
-	pci_set_drvdata(pdev, hw);
-
-	sc = hw->priv;
-	sc->hw = hw;
-	sc->dev = &pdev->dev;
-	sc->mem = mem;
-	sc->bus_ops = &ath_pci_bus_ops;
-
-	if (ath_attach(id->device, sc) != 0) {
-		ret = -ENODEV;
-		goto bad3;
-	}
-
-	/* setup interrupt service routine */
-
-	if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) {
-		printk(KERN_ERR "%s: request_irq failed\n",
-			wiphy_name(hw->wiphy));
-		ret = -EIO;
-		goto bad4;
-	}
-
-	ah = sc->sc_ah;
-	printk(KERN_INFO
-	       "%s: Atheros AR%s MAC/BB Rev:%x "
-	       "AR%s RF Rev:%x: mem=0x%lx, irq=%d\n",
-	       wiphy_name(hw->wiphy),
-	       ath_mac_bb_name(ah->ah_macVersion),
-	       ah->ah_macRev,
-	       ath_rf_name((ah->ah_analog5GhzRev & AR_RADIO_SREV_MAJOR)),
-	       ah->ah_phyRev,
-	       (unsigned long)mem, pdev->irq);
-
-	return 0;
-bad4:
-	ath_detach(sc);
-bad3:
-	ieee80211_free_hw(hw);
-bad2:
-	pci_iounmap(pdev, mem);
-bad1:
-	pci_release_region(pdev, 0);
-bad:
-	pci_disable_device(pdev);
-	return ret;
-}
-
-static void ath_pci_remove(struct pci_dev *pdev)
-{
-	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
-	struct ath_softc *sc = hw->priv;
-
-	ath_pci_cleanup(sc);
-}
-
-#ifdef CONFIG_PM
-
-static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
-{
-	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
-	struct ath_softc *sc = hw->priv;
-
-	ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
-
-#if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
-	if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
-		cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
-#endif
-
-	pci_save_state(pdev);
-	pci_disable_device(pdev);
-	pci_set_power_state(pdev, 3);
-
-	return 0;
-}
-
-static int ath_pci_resume(struct pci_dev *pdev)
-{
-	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
-	struct ath_softc *sc = hw->priv;
-	u32 val;
-	int err;
-
-	err = pci_enable_device(pdev);
-	if (err)
-		return err;
-	pci_restore_state(pdev);
-	/*
-	 * Suspend/Resume resets the PCI configuration space, so we have to
-	 * re-disable the RETRY_TIMEOUT register (0x41) to keep
-	 * PCI Tx retries from interfering with C3 CPU state
-	 */
-	pci_read_config_dword(pdev, 0x40, &val);
-	if ((val & 0x0000ff00) != 0)
-		pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
-
-	/* Enable LED */
-	ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
-			    AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
-	ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
-
-#if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
-	/*
-	 * check the h/w rfkill state on resume
-	 * and start the rfkill poll timer
-	 */
-	if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
-		queue_delayed_work(sc->hw->workqueue,
-				   &sc->rf_kill.rfkill_poll, 0);
-#endif
-
-	return 0;
-}
-
-#endif /* CONFIG_PM */
-
-MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
-
-static struct pci_driver ath_pci_driver = {
-	.name       = "ath9k",
-	.id_table   = ath_pci_id_table,
-	.probe      = ath_pci_probe,
-	.remove     = ath_pci_remove,
-#ifdef CONFIG_PM
-	.suspend    = ath_pci_suspend,
-	.resume     = ath_pci_resume,
-#endif /* CONFIG_PM */
-};
-
-static int __init init_ath_pci(void)
+static int __init ath9k_init(void)
 {
 	int error;
 
@@ -2764,26 +2503,30 @@ static int __init init_ath_pci(void)
 		printk(KERN_ERR
 			"Unable to register rate control algorithm: %d\n",
 			error);
-		ath_rate_control_unregister();
-		return error;
+		goto err_out;
 	}
 
-	if (pci_register_driver(&ath_pci_driver) < 0) {
+	error = ath_pci_init();
+	if (error < 0) {
 		printk(KERN_ERR
 			"ath_pci: No devices found, driver not installed.\n");
-		ath_rate_control_unregister();
-		pci_unregister_driver(&ath_pci_driver);
-		return -ENODEV;
+		error = -ENODEV;
+		goto err_rate_unregister;
 	}
 
 	return 0;
+
+ err_rate_unregister:
+	ath_rate_control_unregister();
+ err_out:
+	return error;
 }
-module_init(init_ath_pci);
+module_init(ath9k_init);
 
-static void __exit exit_ath_pci(void)
+static void __exit ath9k_exit(void)
 {
+	ath_pci_exit();
 	ath_rate_control_unregister();
-	pci_unregister_driver(&ath_pci_driver);
 	printk(KERN_INFO "%s: Driver unloaded\n", dev_info);
 }
-module_exit(exit_ath_pci);
+module_exit(ath9k_exit);
--- /dev/null
+++ b/drivers/net/wireless/ath9k/pci.c
@@ -0,0 +1,289 @@
+/*
+ * Copyright (c) 2008 Atheros Communications Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/nl80211.h>
+#include <linux/pci.h>
+#include "core.h"
+#include "reg.h"
+#include "hw.h"
+
+static struct pci_device_id ath_pci_id_table[] __devinitdata = {
+	{ PCI_VDEVICE(ATHEROS, 0x0023) }, /* PCI   */
+	{ PCI_VDEVICE(ATHEROS, 0x0024) }, /* PCI-E */
+	{ PCI_VDEVICE(ATHEROS, 0x0027) }, /* PCI   */
+	{ PCI_VDEVICE(ATHEROS, 0x0029) }, /* PCI   */
+	{ PCI_VDEVICE(ATHEROS, 0x002A) }, /* PCI-E */
+	{ PCI_VDEVICE(ATHEROS, 0x002B) }, /* PCI-E */
+	{ 0 }
+};
+
+/* return bus cachesize in 4B word units */
+static void ath_pci_read_cachesize(struct ath_softc *sc, int *csz)
+{
+	u8 u8tmp;
+
+	pci_read_config_byte(to_pci_dev(sc->dev), PCI_CACHE_LINE_SIZE,
+			     (u8 *)&u8tmp);
+	*csz = (int)u8tmp;
+
+	/*
+	 * This check was put in to avoid "unplesant" consequences if
+	 * the bootrom has not fully initialized all PCI devices.
+	 * Sometimes the cache line size register is not set
+	 */
+
+	if (*csz == 0)
+		*csz = DEFAULT_CACHELINE >> 2;   /* Use the default size */
+}
+
+static void ath_pci_cleanup(struct ath_softc *sc)
+{
+	struct pci_dev *pdev = to_pci_dev(sc->dev);
+
+	ath_detach(sc);
+	if (pdev->irq)
+		free_irq(pdev->irq, sc);
+	pci_iounmap(pdev, sc->mem);
+	pci_release_region(pdev, 0);
+	pci_disable_device(pdev);
+	ieee80211_free_hw(sc->hw);
+}
+
+static struct ath_bus_ops ath_pci_bus_ops = {
+	.read_cachesize = ath_pci_read_cachesize,
+	.cleanup = ath_pci_cleanup,
+};
+
+static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	void __iomem *mem;
+	struct ath_softc *sc;
+	struct ieee80211_hw *hw;
+	u8 csz;
+	u32 val;
+	int ret = 0;
+	struct ath_hal *ah;
+
+	if (pci_enable_device(pdev))
+		return -EIO;
+
+	ret =  pci_set_dma_mask(pdev, DMA_32BIT_MASK);
+
+	if (ret) {
+		printk(KERN_ERR "ath9k: 32-bit DMA not available\n");
+		goto bad;
+	}
+
+	ret = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
+
+	if (ret) {
+		printk(KERN_ERR "ath9k: 32-bit DMA consistent "
+			"DMA enable failed\n");
+		goto bad;
+	}
+
+	/*
+	 * Cache line size is used to size and align various
+	 * structures used to communicate with the hardware.
+	 */
+	pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
+	if (csz == 0) {
+		/*
+		 * Linux 2.4.18 (at least) writes the cache line size
+		 * register as a 16-bit wide register which is wrong.
+		 * We must have this setup properly for rx buffer
+		 * DMA to work so force a reasonable value here if it
+		 * comes up zero.
+		 */
+		csz = L1_CACHE_BYTES / sizeof(u32);
+		pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
+	}
+	/*
+	 * The default setting of latency timer yields poor results,
+	 * set it to the value used by other systems. It may be worth
+	 * tweaking this setting more.
+	 */
+	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
+
+	pci_set_master(pdev);
+
+	/*
+	 * Disable the RETRY_TIMEOUT register (0x41) to keep
+	 * PCI Tx retries from interfering with C3 CPU state.
+	 */
+	pci_read_config_dword(pdev, 0x40, &val);
+	if ((val & 0x0000ff00) != 0)
+		pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
+
+	ret = pci_request_region(pdev, 0, "ath9k");
+	if (ret) {
+		dev_err(&pdev->dev, "PCI memory region reserve error\n");
+		ret = -ENODEV;
+		goto bad;
+	}
+
+	mem = pci_iomap(pdev, 0, 0);
+	if (!mem) {
+		printk(KERN_ERR "PCI memory map error\n") ;
+		ret = -EIO;
+		goto bad1;
+	}
+
+	hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
+	if (hw == NULL) {
+		printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n");
+		goto bad2;
+	}
+
+	SET_IEEE80211_DEV(hw, &pdev->dev);
+	pci_set_drvdata(pdev, hw);
+
+	sc = hw->priv;
+	sc->hw = hw;
+	sc->dev = &pdev->dev;
+	sc->mem = mem;
+	sc->bus_ops = &ath_pci_bus_ops;
+
+	if (ath_attach(id->device, sc) != 0) {
+		ret = -ENODEV;
+		goto bad3;
+	}
+
+	/* setup interrupt service routine */
+
+	if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) {
+		printk(KERN_ERR "%s: request_irq failed\n",
+			wiphy_name(hw->wiphy));
+		ret = -EIO;
+		goto bad4;
+	}
+
+	ah = sc->sc_ah;
+	printk(KERN_INFO
+	       "%s: Atheros AR%s MAC/BB Rev:%x "
+	       "AR%s RF Rev:%x: mem=0x%lx, irq=%d\n",
+	       wiphy_name(hw->wiphy),
+	       ath_mac_bb_name(ah->ah_macVersion),
+	       ah->ah_macRev,
+	       ath_rf_name((ah->ah_analog5GhzRev & AR_RADIO_SREV_MAJOR)),
+	       ah->ah_phyRev,
+	       (unsigned long)mem, pdev->irq);
+
+	return 0;
+bad4:
+	ath_detach(sc);
+bad3:
+	ieee80211_free_hw(hw);
+bad2:
+	pci_iounmap(pdev, mem);
+bad1:
+	pci_release_region(pdev, 0);
+bad:
+	pci_disable_device(pdev);
+	return ret;
+}
+
+static void ath_pci_remove(struct pci_dev *pdev)
+{
+	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+	struct ath_softc *sc = hw->priv;
+
+	ath_pci_cleanup(sc);
+}
+
+#ifdef CONFIG_PM
+
+static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+	struct ath_softc *sc = hw->priv;
+
+	ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
+
+#if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
+	if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
+		cancel_delayed_work_sync(&sc->rf_kill.rfkill_poll);
+#endif
+
+	pci_save_state(pdev);
+	pci_disable_device(pdev);
+	pci_set_power_state(pdev, 3);
+
+	return 0;
+}
+
+static int ath_pci_resume(struct pci_dev *pdev)
+{
+	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
+	struct ath_softc *sc = hw->priv;
+	u32 val;
+	int err;
+
+	err = pci_enable_device(pdev);
+	if (err)
+		return err;
+	pci_restore_state(pdev);
+	/*
+	 * Suspend/Resume resets the PCI configuration space, so we have to
+	 * re-disable the RETRY_TIMEOUT register (0x41) to keep
+	 * PCI Tx retries from interfering with C3 CPU state
+	 */
+	pci_read_config_dword(pdev, 0x40, &val);
+	if ((val & 0x0000ff00) != 0)
+		pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
+
+	/* Enable LED */
+	ath9k_hw_cfg_output(sc->sc_ah, ATH_LED_PIN,
+			    AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
+	ath9k_hw_set_gpio(sc->sc_ah, ATH_LED_PIN, 1);
+
+#if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
+	/*
+	 * check the h/w rfkill state on resume
+	 * and start the rfkill poll timer
+	 */
+	if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
+		queue_delayed_work(sc->hw->workqueue,
+				   &sc->rf_kill.rfkill_poll, 0);
+#endif
+
+	return 0;
+}
+
+#endif /* CONFIG_PM */
+
+MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
+
+static struct pci_driver ath_pci_driver = {
+	.name       = "ath9k",
+	.id_table   = ath_pci_id_table,
+	.probe      = ath_pci_probe,
+	.remove     = ath_pci_remove,
+#ifdef CONFIG_PM
+	.suspend    = ath_pci_suspend,
+	.resume     = ath_pci_resume,
+#endif /* CONFIG_PM */
+};
+
+int __init ath_pci_init(void)
+{
+	return pci_register_driver(&ath_pci_driver);
+}
+
+void ath_pci_exit(void)
+{
+	pci_unregister_driver(&ath_pci_driver);
+}