Staging: add rt2860 wireless driver

This is the Ralink RT2860 driver from the company that does horrible
things like reading a config file from /etc.  However, the driver that
is currently under development from the wireless development community
is not working at all yet, so distros and users are using this version
instead (quite common hardware on a lot of netbook machines).

So here is this driver, for now, until the wireless developers get a
"clean" version into the main tree, or until this version is cleaned up
sufficiently to move out of the staging tree.

Ported to the Linux build system and cleaned up a bit already by me.

Cc: Linux wireless <linux-wireless@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1377 insertions, 0 deletions

diff --git a/drivers/staging/rt2860/2860_main_dev.c b/drivers/staging/rt2860/2860_main_dev.c
new file mode 100644
index 000000000000..c29453641851
--- /dev/null
+++ b/drivers/staging/rt2860/2860_main_dev.c
@@ -0,0 +1,1377 @@
+/*
+ *************************************************************************
+ * Ralink Tech Inc.
+ * 5F., No.36, Taiyuan St., Jhubei City,
+ * Hsinchu County 302,
+ * Taiwan, R.O.C.
+ *
+ * (c) Copyright 2002-2007, Ralink Technology, Inc.
+ *
+ * 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 Name:
+    2870_main_dev.c
+
+    Abstract:
+    Create and register network interface.
+
+    Revision History:
+    Who         When            What
+    --------    ----------      ----------------------------------------------
+*/
+
+#include "rt_config.h"
+
+
+#ifdef MULTIPLE_CARD_SUPPORT
+// record whether the card in the card list is used in the card file
+extern UINT8  MC_CardUsed[];
+#endif // MULTIPLE_CARD_SUPPORT //
+
+
+extern INT __devinit rt28xx_probe(IN void *_dev_p, IN void *_dev_id_p,
+									IN UINT argc, OUT PRTMP_ADAPTER *ppAd);
+
+static void rx_done_tasklet(unsigned long data);
+static void mgmt_dma_done_tasklet(unsigned long data);
+static void ac0_dma_done_tasklet(unsigned long data);
+static void ac1_dma_done_tasklet(unsigned long data);
+static void ac2_dma_done_tasklet(unsigned long data);
+static void ac3_dma_done_tasklet(unsigned long data);
+static void hcca_dma_done_tasklet(unsigned long data);
+static void fifo_statistic_full_tasklet(unsigned long data);
+
+
+/*---------------------------------------------------------------------*/
+/* Symbol & Macro Definitions                                          */
+/*---------------------------------------------------------------------*/
+#define RT2860_INT_RX_DLY				(1<<0)		// bit 0
+#define RT2860_INT_TX_DLY				(1<<1)		// bit 1
+#define RT2860_INT_RX_DONE				(1<<2)		// bit 2
+#define RT2860_INT_AC0_DMA_DONE			(1<<3)		// bit 3
+#define RT2860_INT_AC1_DMA_DONE			(1<<4)		// bit 4
+#define RT2860_INT_AC2_DMA_DONE			(1<<5)		// bit 5
+#define RT2860_INT_AC3_DMA_DONE			(1<<6)		// bit 6
+#define RT2860_INT_HCCA_DMA_DONE		(1<<7)		// bit 7
+#define RT2860_INT_MGMT_DONE			(1<<8)		// bit 8
+
+#define INT_RX			RT2860_INT_RX_DONE
+
+#define INT_AC0_DLY		(RT2860_INT_AC0_DMA_DONE) //| RT2860_INT_TX_DLY)
+#define INT_AC1_DLY		(RT2860_INT_AC1_DMA_DONE) //| RT2860_INT_TX_DLY)
+#define INT_AC2_DLY		(RT2860_INT_AC2_DMA_DONE) //| RT2860_INT_TX_DLY)
+#define INT_AC3_DLY		(RT2860_INT_AC3_DMA_DONE) //| RT2860_INT_TX_DLY)
+#define INT_HCCA_DLY 	(RT2860_INT_HCCA_DMA_DONE) //| RT2860_INT_TX_DLY)
+#define INT_MGMT_DLY	RT2860_INT_MGMT_DONE
+
+/*---------------------------------------------------------------------*/
+/* Prototypes of Functions Used                                        */
+/*---------------------------------------------------------------------*/
+/* function declarations */
+static INT __devinit rt2860_init_one (struct pci_dev *pci_dev, const struct pci_device_id  *ent);
+static VOID __devexit rt2860_remove_one(struct pci_dev *pci_dev);
+static INT __devinit rt2860_probe(struct pci_dev *pci_dev, const struct pci_device_id  *ent);
+void init_thread_task(PRTMP_ADAPTER pAd);
+static void __exit rt2860_cleanup_module(void);
+static int __init rt2860_init_module(void);
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+#ifdef CONFIG_PM
+static int rt2860_suspend(struct pci_dev *pci_dev, pm_message_t state);
+static int rt2860_resume(struct pci_dev *pci_dev);
+#endif // CONFIG_PM //
+#endif
+
+
+//
+// Ralink PCI device table, include all supported chipsets
+//
+static struct pci_device_id rt2860_pci_tbl[] __devinitdata =
+{
+	{PCI_DEVICE(NIC_PCI_VENDOR_ID, NIC2860_PCI_DEVICE_ID)},		//RT28602.4G
+	{PCI_DEVICE(NIC_PCI_VENDOR_ID, NIC2860_PCIe_DEVICE_ID)},
+	{PCI_DEVICE(NIC_PCI_VENDOR_ID, NIC2760_PCI_DEVICE_ID)},
+	{PCI_DEVICE(NIC_PCI_VENDOR_ID, NIC2790_PCIe_DEVICE_ID)},
+	{PCI_DEVICE(VEN_AWT_PCI_VENDOR_ID, VEN_AWT_PCIe_DEVICE_ID)},
+    {0,}		// terminate list
+};
+
+MODULE_DEVICE_TABLE(pci, rt2860_pci_tbl);
+#ifdef CONFIG_STA_SUPPORT
+MODULE_LICENSE("GPL");
+#ifdef MODULE_VERSION
+MODULE_VERSION(STA_DRIVER_VERSION);
+#endif
+#endif // CONFIG_STA_SUPPORT //
+
+
+//
+// Our PCI driver structure
+//
+static struct pci_driver rt2860_driver =
+{
+    name:       "rt2860",
+    id_table:   rt2860_pci_tbl,
+    probe:      rt2860_init_one,
+#if LINUX_VERSION_CODE >= 0x20412
+    remove:     __devexit_p(rt2860_remove_one),
+#else
+    remove:     __devexit(rt2860_remove_one),
+#endif
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+#ifdef CONFIG_PM
+	suspend:	rt2860_suspend,
+	resume:		rt2860_resume,
+#endif
+#endif
+};
+
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+#ifdef CONFIG_PM
+
+VOID RT2860RejectPendingPackets(
+	IN	PRTMP_ADAPTER	pAd)
+{
+	// clear PS packets
+	// clear TxSw packets
+}
+
+static int rt2860_suspend(
+	struct pci_dev *pci_dev,
+	pm_message_t state)
+{
+	struct net_device *net_dev = pci_get_drvdata(pci_dev);
+	PRTMP_ADAPTER pAd = (PRTMP_ADAPTER)NULL;
+	INT32 retval;
+
+
+	DBGPRINT(RT_DEBUG_TRACE, ("===> rt2860_suspend()\n"));
+
+	if (net_dev == NULL)
+	{
+		DBGPRINT(RT_DEBUG_ERROR, ("net_dev == NULL!\n"));
+	}
+	else
+	{
+		pAd = (PRTMP_ADAPTER)net_dev->priv;
+
+		/* we can not use IFF_UP because ra0 down but ra1 up */
+		/* and 1 suspend/resume function for 1 module, not for each interface */
+		/* so Linux will call suspend/resume function once */
+		if (VIRTUAL_IF_NUM(pAd) > 0)
+		{
+			// avoid users do suspend after interface is down
+
+			// stop interface
+			netif_carrier_off(net_dev);
+			netif_stop_queue(net_dev);
+
+			// mark device as removed from system and therefore no longer available
+			netif_device_detach(net_dev);
+
+			// mark halt flag
+			RTMP_SET_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS);
+			RTMP_SET_FLAG(pAd, fRTMP_ADAPTER_RADIO_OFF);
+
+			// take down the device
+			rt28xx_close((PNET_DEV)net_dev);
+
+			RT_MOD_DEC_USE_COUNT();
+		}
+	}
+
+	// reference to http://vovo2000.com/type-lab/linux/kernel-api/linux-kernel-api.html
+	// enable device to generate PME# when suspended
+	// pci_choose_state(): Choose the power state of a PCI device to be suspended
+	retval = pci_enable_wake(pci_dev, pci_choose_state(pci_dev, state), 1);
+	// save the PCI configuration space of a device before suspending
+	pci_save_state(pci_dev);
+	// disable PCI device after use
+	pci_disable_device(pci_dev);
+
+	retval = pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
+
+	DBGPRINT(RT_DEBUG_TRACE, ("<=== rt2860_suspend()\n"));
+	return retval;
+}
+
+static int rt2860_resume(
+	struct pci_dev *pci_dev)
+{
+	struct net_device *net_dev = pci_get_drvdata(pci_dev);
+	PRTMP_ADAPTER pAd = (PRTMP_ADAPTER)NULL;
+	INT32 retval;
+
+
+	// set the power state of a PCI device
+	// PCI has 4 power states, DO (normal) ~ D3(less power)
+	// in include/linux/pci.h, you can find that
+	// #define PCI_D0          ((pci_power_t __force) 0)
+	// #define PCI_D1          ((pci_power_t __force) 1)
+	// #define PCI_D2          ((pci_power_t __force) 2)
+	// #define PCI_D3hot       ((pci_power_t __force) 3)
+	// #define PCI_D3cold      ((pci_power_t __force) 4)
+	// #define PCI_UNKNOWN     ((pci_power_t __force) 5)
+	// #define PCI_POWER_ERROR ((pci_power_t __force) -1)
+	retval = pci_set_power_state(pci_dev, PCI_D0);
+
+	// restore the saved state of a PCI device
+	pci_restore_state(pci_dev);
+
+	// initialize device before it's used by a driver
+	if (pci_enable_device(pci_dev))
+	{
+		printk("pci enable fail!\n");
+		return 0;
+	}
+
+	DBGPRINT(RT_DEBUG_TRACE, ("===> rt2860_resume()\n"));
+
+	if (net_dev == NULL)
+	{
+		DBGPRINT(RT_DEBUG_ERROR, ("net_dev == NULL!\n"));
+	}
+	else
+		pAd = (PRTMP_ADAPTER)net_dev->priv;
+
+	if (pAd != NULL)
+	{
+		/* we can not use IFF_UP because ra0 down but ra1 up */
+		/* and 1 suspend/resume function for 1 module, not for each interface */
+		/* so Linux will call suspend/resume function once */
+		if (VIRTUAL_IF_NUM(pAd) > 0)
+		{
+			// mark device as attached from system and restart if needed
+			netif_device_attach(net_dev);
+
+			if (rt28xx_open((PNET_DEV)net_dev) != 0)
+			{
+				// open fail
+				DBGPRINT(RT_DEBUG_TRACE, ("<=== rt2860_resume()\n"));
+				return 0;
+			}
+
+			// increase MODULE use count
+			RT_MOD_INC_USE_COUNT();
+
+			RTMP_CLEAR_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS);
+			RTMP_CLEAR_FLAG(pAd, fRTMP_ADAPTER_RADIO_OFF);
+
+			netif_start_queue(net_dev);
+			netif_carrier_on(net_dev);
+			netif_wake_queue(net_dev);
+		}
+	}
+
+	DBGPRINT(RT_DEBUG_TRACE, ("<=== rt2860_resume()\n"));
+	return 0;
+}
+#endif // CONFIG_PM //
+#endif
+
+
+static INT __init rt2860_init_module(VOID)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+	return pci_register_driver(&rt2860_driver);
+#else
+    return pci_module_init(&rt2860_driver);
+#endif
+}
+
+
+//
+// Driver module unload function
+//
+static VOID __exit rt2860_cleanup_module(VOID)
+{
+    pci_unregister_driver(&rt2860_driver);
+}
+
+module_init(rt2860_init_module);
+module_exit(rt2860_cleanup_module);
+
+
+static INT __devinit rt2860_init_one (
+    IN  struct pci_dev              *pci_dev,
+    IN  const struct pci_device_id  *ent)
+{
+    INT rc;
+
+    DBGPRINT(RT_DEBUG_TRACE, ("===> rt2860_init_one\n"));
+
+    // wake up and enable device
+    if (pci_enable_device (pci_dev))
+    {
+        rc = -EIO;
+    }
+    else
+    {
+        rc = rt2860_probe(pci_dev, ent);
+    }
+
+    DBGPRINT(RT_DEBUG_TRACE, ("<=== rt2860_init_one\n"));
+    return rc;
+}
+
+
+static VOID __devexit rt2860_remove_one(
+    IN  struct pci_dev  *pci_dev)
+{
+    struct net_device   *net_dev = pci_get_drvdata(pci_dev);
+    RTMP_ADAPTER        *pAd = net_dev->priv;
+
+    DBGPRINT(RT_DEBUG_TRACE, ("===> rt2860_remove_one\n"));
+
+	if (pAd != NULL)
+	{
+#ifdef MULTIPLE_CARD_SUPPORT
+		if ((pAd->MC_RowID >= 0) && (pAd->MC_RowID <= MAX_NUM_OF_MULTIPLE_CARD))
+			MC_CardUsed[pAd->MC_RowID] = 0; // not clear MAC address
+#endif // MULTIPLE_CARD_SUPPORT //
+
+
+
+
+		// Unregister network device
+		unregister_netdev(net_dev);
+
+		// Unmap CSR base address
+		iounmap((char *)(net_dev->base_addr));
+
+		RTMPFreeAdapter(pAd);
+
+		// release memory region
+		release_mem_region(pci_resource_start(pci_dev, 0), pci_resource_len(pci_dev, 0));
+	}
+	else
+	{
+		// Unregister network device
+		unregister_netdev(net_dev);
+
+		// Unmap CSR base address
+		iounmap((char *)(net_dev->base_addr));
+
+		// release memory region
+		release_mem_region(pci_resource_start(pci_dev, 0), pci_resource_len(pci_dev, 0));
+	}
+
+	// Free pre-allocated net_device memory
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+	free_netdev(net_dev);
+#else
+	kfree(net_dev);
+#endif
+}
+
+//
+// PCI device probe & initialization function
+//
+static INT __devinit   rt2860_probe(
+    IN  struct pci_dev              *pci_dev,
+    IN  const struct pci_device_id  *ent)
+{
+	PRTMP_ADAPTER pAd;
+    INT rv = 0;
+
+    rv = (INT)rt28xx_probe((void *)pci_dev, (void *)ent, 0, &pAd);
+	OPSTATUS_CLEAR_FLAG(pAd, fOP_STATUS_ADVANCE_POWER_SAVE_PCIE_DEVICE);
+	return rv;
+}
+
+
+void init_thread_task(IN PRTMP_ADAPTER pAd)
+{
+	POS_COOKIE pObj;
+
+	pObj = (POS_COOKIE) pAd->OS_Cookie;
+
+	tasklet_init(&pObj->rx_done_task, rx_done_tasklet, (unsigned long)pAd);
+	tasklet_init(&pObj->mgmt_dma_done_task, mgmt_dma_done_tasklet, (unsigned long)pAd);
+	tasklet_init(&pObj->ac0_dma_done_task, ac0_dma_done_tasklet, (unsigned long)pAd);
+	tasklet_init(&pObj->ac1_dma_done_task, ac1_dma_done_tasklet, (unsigned long)pAd);
+	tasklet_init(&pObj->ac2_dma_done_task, ac2_dma_done_tasklet, (unsigned long)pAd);
+	tasklet_init(&pObj->ac3_dma_done_task, ac3_dma_done_tasklet, (unsigned long)pAd);
+	tasklet_init(&pObj->hcca_dma_done_task, hcca_dma_done_tasklet, (unsigned long)pAd);
+	tasklet_init(&pObj->tbtt_task, tbtt_tasklet, (unsigned long)pAd);
+	tasklet_init(&pObj->fifo_statistic_full_task, fifo_statistic_full_tasklet, (unsigned long)pAd);
+}
+
+void kill_thread_task(IN PRTMP_ADAPTER pAd)
+{
+	POS_COOKIE pObj;
+
+	pObj = (POS_COOKIE) pAd->OS_Cookie;
+
+	tasklet_kill(&pObj->rx_done_task);
+	tasklet_kill(&pObj->mgmt_dma_done_task);
+	tasklet_kill(&pObj->ac0_dma_done_task);
+	tasklet_kill(&pObj->ac1_dma_done_task);
+	tasklet_kill(&pObj->ac2_dma_done_task);
+	tasklet_kill(&pObj->ac3_dma_done_task);
+	tasklet_kill(&pObj->hcca_dma_done_task);
+	tasklet_kill(&pObj->tbtt_task);
+	tasklet_kill(&pObj->fifo_statistic_full_task);
+}
+
+
+static void rt2860_int_enable(PRTMP_ADAPTER pAd, unsigned int mode)
+{
+	u32 regValue;
+
+	pAd->int_disable_mask &= ~(mode);
+	regValue = pAd->int_enable_reg & ~(pAd->int_disable_mask);
+	RTMP_IO_WRITE32(pAd, INT_MASK_CSR, regValue);     // 1:enable
+
+	if (regValue != 0)
+		RTMP_SET_FLAG(pAd, fRTMP_ADAPTER_INTERRUPT_ACTIVE);
+}
+
+
+static void rt2860_int_disable(PRTMP_ADAPTER pAd, unsigned int mode)
+{
+	u32 regValue;
+
+	pAd->int_disable_mask |= mode;
+	regValue = 	pAd->int_enable_reg & ~(pAd->int_disable_mask);
+	RTMP_IO_WRITE32(pAd, INT_MASK_CSR, regValue);     // 0: disable
+
+	if (regValue == 0)
+	{
+		RTMP_CLEAR_FLAG(pAd, fRTMP_ADAPTER_INTERRUPT_ACTIVE);
+	}
+}
+
+static void mgmt_dma_done_tasklet(unsigned long data)
+{
+	unsigned long flags;
+	PRTMP_ADAPTER pAd = (PRTMP_ADAPTER) data;
+    INT_SOURCE_CSR_STRUC	IntSource;
+	POS_COOKIE pObj;
+
+	// Do nothing if the driver is starting halt state.
+	// This might happen when timer already been fired before cancel timer with mlmehalt
+	if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
+		return;
+
+    pObj = (POS_COOKIE) pAd->OS_Cookie;
+
+	IntSource.word = 0;
+	IntSource.field.MgmtDmaDone = 1;
+	pAd->int_pending &= ~INT_MGMT_DLY;
+
+	RTMPHandleMgmtRingDmaDoneInterrupt(pAd);
+
+	// if you use RTMP_SEM_LOCK, sometimes kernel will hang up, no any
+	// bug report output
+	RTMP_INT_LOCK(&pAd->irq_lock, flags);
+	/*
+	 * double check to avoid lose of interrupts
+	 */
+	if (pAd->int_pending & INT_MGMT_DLY)
+	{
+		tasklet_hi_schedule(&pObj->mgmt_dma_done_task);
+		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+		return;
+	}
+
+	/* enable TxDataInt again */
+	rt2860_int_enable(pAd, INT_MGMT_DLY);
+	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+}
+
+static void rx_done_tasklet(unsigned long data)
+{
+	unsigned long flags;
+	PRTMP_ADAPTER pAd = (PRTMP_ADAPTER) data;
+	BOOLEAN	bReschedule = 0;
+	POS_COOKIE pObj;
+
+	// Do nothing if the driver is starting halt state.
+	// This might happen when timer already been fired before cancel timer with mlmehalt
+	if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
+		return;
+
+    pObj = (POS_COOKIE) pAd->OS_Cookie;
+
+	pAd->int_pending &= ~(INT_RX);
+#ifdef CONFIG_STA_SUPPORT
+	IF_DEV_CONFIG_OPMODE_ON_STA(pAd)
+		bReschedule = STARxDoneInterruptHandle(pAd, 0);
+#endif // CONFIG_STA_SUPPORT //
+
+	RTMP_INT_LOCK(&pAd->irq_lock, flags);
+	/*
+	 * double check to avoid rotting packet
+	 */
+	if (pAd->int_pending & INT_RX || bReschedule)
+	{
+		tasklet_hi_schedule(&pObj->rx_done_task);
+		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+		return;
+	}
+
+	/* enable RxINT again */
+	rt2860_int_enable(pAd, INT_RX);
+	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+
+}
+
+void fifo_statistic_full_tasklet(unsigned long data)
+{
+	unsigned long flags;
+	PRTMP_ADAPTER pAd = (PRTMP_ADAPTER) data;
+	POS_COOKIE pObj;
+
+	// Do nothing if the driver is starting halt state.
+	// This might happen when timer already been fired before cancel timer with mlmehalt
+	if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
+		return;
+
+    pObj = (POS_COOKIE) pAd->OS_Cookie;
+
+	pAd->int_pending &= ~(FifoStaFullInt);
+	NICUpdateFifoStaCounters(pAd);
+
+	RTMP_INT_LOCK(&pAd->irq_lock, flags);
+	/*
+	 * double check to avoid rotting packet
+	 */
+	if (pAd->int_pending & FifoStaFullInt)
+	{
+		tasklet_hi_schedule(&pObj->fifo_statistic_full_task);
+		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+		return;
+	}
+
+	/* enable RxINT again */
+
+	rt2860_int_enable(pAd, FifoStaFullInt);
+	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+
+}
+
+static void hcca_dma_done_tasklet(unsigned long data)
+{
+	unsigned long flags;
+	PRTMP_ADAPTER pAd = (PRTMP_ADAPTER) data;
+    INT_SOURCE_CSR_STRUC	IntSource;
+	POS_COOKIE pObj;
+
+	// Do nothing if the driver is starting halt state.
+	// This might happen when timer already been fired before cancel timer with mlmehalt
+	if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
+		return;
+
+    pObj = (POS_COOKIE) pAd->OS_Cookie;
+
+
+	IntSource.word = 0;
+	IntSource.field.HccaDmaDone = 1;
+	pAd->int_pending &= ~INT_HCCA_DLY;
+
+	RTMPHandleTxRingDmaDoneInterrupt(pAd, IntSource);
+
+	RTMP_INT_LOCK(&pAd->irq_lock, flags);
+	/*
+	 * double check to avoid lose of interrupts
+	 */
+	if (pAd->int_pending & INT_HCCA_DLY)
+	{
+		tasklet_hi_schedule(&pObj->hcca_dma_done_task);
+		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+		return;
+	}
+
+	/* enable TxDataInt again */
+	rt2860_int_enable(pAd, INT_HCCA_DLY);
+	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+}
+
+static void ac3_dma_done_tasklet(unsigned long data)
+{
+	unsigned long flags;
+	PRTMP_ADAPTER pAd = (PRTMP_ADAPTER) data;
+    INT_SOURCE_CSR_STRUC	IntSource;
+	POS_COOKIE pObj;
+	BOOLEAN bReschedule = 0;
+
+	// Do nothing if the driver is starting halt state.
+	// This might happen when timer already been fired before cancel timer with mlmehalt
+	if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
+		return;
+
+    pObj = (POS_COOKIE) pAd->OS_Cookie;
+
+	IntSource.word = 0;
+	IntSource.field.Ac3DmaDone = 1;
+	pAd->int_pending &= ~INT_AC3_DLY;
+
+	bReschedule = RTMPHandleTxRingDmaDoneInterrupt(pAd, IntSource);
+
+	RTMP_INT_LOCK(&pAd->irq_lock, flags);
+	/*
+	 * double check to avoid lose of interrupts
+	 */
+	if ((pAd->int_pending & INT_AC3_DLY) || bReschedule)
+	{
+		tasklet_hi_schedule(&pObj->ac3_dma_done_task);
+		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+		return;
+	}
+
+	/* enable TxDataInt again */
+	rt2860_int_enable(pAd, INT_AC3_DLY);
+	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+}
+
+static void ac2_dma_done_tasklet(unsigned long data)
+{
+	unsigned long flags;
+	PRTMP_ADAPTER pAd = (PRTMP_ADAPTER) data;
+    INT_SOURCE_CSR_STRUC	IntSource;
+	POS_COOKIE pObj;
+	BOOLEAN bReschedule = 0;
+
+	// Do nothing if the driver is starting halt state.
+	// This might happen when timer already been fired before cancel timer with mlmehalt
+	if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
+		return;
+
+    pObj = (POS_COOKIE) pAd->OS_Cookie;
+
+	IntSource.word = 0;
+	IntSource.field.Ac2DmaDone = 1;
+	pAd->int_pending &= ~INT_AC2_DLY;
+
+	bReschedule = RTMPHandleTxRingDmaDoneInterrupt(pAd, IntSource);
+
+	RTMP_INT_LOCK(&pAd->irq_lock, flags);
+
+	/*
+	 * double check to avoid lose of interrupts
+	 */
+	if ((pAd->int_pending & INT_AC2_DLY) || bReschedule)
+	{
+		tasklet_hi_schedule(&pObj->ac2_dma_done_task);
+		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+		return;
+	}
+
+	/* enable TxDataInt again */
+	rt2860_int_enable(pAd, INT_AC2_DLY);
+	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+}
+
+static void ac1_dma_done_tasklet(unsigned long data)
+{
+	unsigned long flags;
+	PRTMP_ADAPTER pAd = (PRTMP_ADAPTER) data;
+    INT_SOURCE_CSR_STRUC	IntSource;
+	POS_COOKIE pObj;
+	BOOLEAN bReschedule = 0;
+
+	// Do nothing if the driver is starting halt state.
+	// This might happen when timer already been fired before cancel timer with mlmehalt
+	if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
+		return;
+
+    pObj = (POS_COOKIE) pAd->OS_Cookie;
+
+	IntSource.word = 0;
+	IntSource.field.Ac1DmaDone = 1;
+	pAd->int_pending &= ~INT_AC1_DLY;
+
+	bReschedule = RTMPHandleTxRingDmaDoneInterrupt(pAd, IntSource);
+
+	RTMP_INT_LOCK(&pAd->irq_lock, flags);
+	/*
+	 * double check to avoid lose of interrupts
+	 */
+	if ((pAd->int_pending & INT_AC1_DLY) || bReschedule)
+	{
+		tasklet_hi_schedule(&pObj->ac1_dma_done_task);
+		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+		return;
+	}
+
+	/* enable TxDataInt again */
+	rt2860_int_enable(pAd, INT_AC1_DLY);
+	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+}
+
+static void ac0_dma_done_tasklet(unsigned long data)
+{
+	unsigned long flags;
+	PRTMP_ADAPTER pAd = (PRTMP_ADAPTER) data;
+    INT_SOURCE_CSR_STRUC	IntSource;
+	POS_COOKIE pObj;
+	BOOLEAN bReschedule = 0;
+
+	// Do nothing if the driver is starting halt state.
+	// This might happen when timer already been fired before cancel timer with mlmehalt
+	if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS | fRTMP_ADAPTER_NIC_NOT_EXIST))
+		return;
+
+    pObj = (POS_COOKIE) pAd->OS_Cookie;
+
+	IntSource.word = 0;
+	IntSource.field.Ac0DmaDone = 1;
+	pAd->int_pending &= ~INT_AC0_DLY;
+
+	bReschedule = RTMPHandleTxRingDmaDoneInterrupt(pAd, IntSource);
+
+	RTMP_INT_LOCK(&pAd->irq_lock, flags);
+	/*
+	 * double check to avoid lose of interrupts
+	 */
+	if ((pAd->int_pending & INT_AC0_DLY) || bReschedule)
+	{
+		tasklet_hi_schedule(&pObj->ac0_dma_done_task);
+		RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+		return;
+	}
+
+	/* enable TxDataInt again */
+	rt2860_int_enable(pAd, INT_AC0_DLY);
+	RTMP_INT_UNLOCK(&pAd->irq_lock, flags);
+}
+
+
+int print_int_count;
+
+IRQ_HANDLE_TYPE
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19))
+rt2860_interrupt(int irq, void *dev_instance)
+#else
+rt2860_interrupt(int irq, void *dev_instance, struct pt_regs *regs)
+#endif
+{
+	struct net_device *net_dev = (struct net_device *) dev_instance;
+	PRTMP_ADAPTER pAd = (PRTMP_ADAPTER) net_dev->priv;
+	INT_SOURCE_CSR_STRUC	IntSource;
+	POS_COOKIE pObj;
+
+	pObj = (POS_COOKIE) pAd->OS_Cookie;
+
+
+	/* Note 03312008: we can not return here before
+		RTMP_IO_READ32(pAd, INT_SOURCE_CSR, &IntSource.word);
+		RTMP_IO_WRITE32(pAd, INT_SOURCE_CSR, IntSource.word);
+		Or kernel will panic after ifconfig ra0 down sometimes */
+
+
+	//
+	// Inital the Interrupt source.
+	//
+	IntSource.word = 0x00000000L;
+//	McuIntSource.word = 0x00000000L;
+
+	//
+	// Get the interrupt sources & saved to local variable
+	//
+	//RTMP_IO_READ32(pAd, where, &McuIntSource.word);
+	//RTMP_IO_WRITE32(pAd, , McuIntSource.word);
+
+	//
+	// Flag fOP_STATUS_DOZE On, means ASIC put to sleep, elase means ASICK WakeUp
+	// And at the same time, clock maybe turned off that say there is no DMA service.
+	// when ASIC get to sleep.
+	// To prevent system hang on power saving.
+	// We need to check it before handle the INT_SOURCE_CSR, ASIC must be wake up.
+	//
+	// RT2661 => when ASIC is sleeping, MAC register cannot be read and written.
+	// RT2860 => when ASIC is sleeping, MAC register can be read and written.
+
+	{
+		RTMP_IO_READ32(pAd, INT_SOURCE_CSR, &IntSource.word);
+		RTMP_IO_WRITE32(pAd, INT_SOURCE_CSR, IntSource.word); // write 1 to clear
+	}
+
+	// Do nothing if Reset in progress
+	if (RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_RESET_IN_PROGRESS) ||
+		RTMP_TEST_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS))
+	{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+        return  IRQ_HANDLED;
+#else
+        return;
+#endif
+	}
+
+	//
+	// Handle interrupt, walk through all bits
+	// Should start from highest priority interrupt
+	// The priority can be adjust by altering processing if statement
+	//
+
+    pAd->bPCIclkOff = FALSE;
+
+	// If required spinlock, each interrupt service routine has to acquire
+	// and release itself.
+	//
+
+	// Do nothing if NIC doesn't exist
+	if (IntSource.word == 0xffffffff)
+	{
+		RTMP_SET_FLAG(pAd, fRTMP_ADAPTER_NIC_NOT_EXIST | fRTMP_ADAPTER_HALT_IN_PROGRESS);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+        return  IRQ_HANDLED;
+#else
+        return;
+#endif
+	}
+
+	if (IntSource.word & TxCoherent)
+	{
+		DBGPRINT(RT_DEBUG_ERROR, (">>>TxCoherent<<<\n"));
+		RTMPHandleRxCoherentInterrupt(pAd);
+	}
+
+	if (IntSource.word & RxCoherent)
+	{
+		DBGPRINT(RT_DEBUG_ERROR, (">>>RxCoherent<<<\n"));
+		RTMPHandleRxCoherentInterrupt(pAd);
+	}
+
+	if (IntSource.word & FifoStaFullInt)
+	{
+#if 1
+		if ((pAd->int_disable_mask & FifoStaFullInt) == 0)
+		{
+			/* mask FifoStaFullInt */
+			rt2860_int_disable(pAd, FifoStaFullInt);
+			tasklet_hi_schedule(&pObj->fifo_statistic_full_task);
+		}
+		pAd->int_pending |= FifoStaFullInt;
+#else
+		NICUpdateFifoStaCounters(pAd);
+#endif
+	}
+
+	if (IntSource.word & INT_MGMT_DLY)
+	{
+		if ((pAd->int_disable_mask & INT_MGMT_DLY) ==0 )
+		{
+			rt2860_int_disable(pAd, INT_MGMT_DLY);
+			tasklet_hi_schedule(&pObj->mgmt_dma_done_task);
+		}
+		pAd->int_pending |= INT_MGMT_DLY ;
+	}
+
+	if (IntSource.word & INT_RX)
+	{
+		if ((pAd->int_disable_mask & INT_RX) == 0)
+		{
+			/* mask RxINT */
+			rt2860_int_disable(pAd, INT_RX);
+			tasklet_hi_schedule(&pObj->rx_done_task);
+		}
+		pAd->int_pending |= INT_RX;
+	}
+
+	if (IntSource.word & INT_HCCA_DLY)
+	{
+
+		if ((pAd->int_disable_mask & INT_HCCA_DLY) == 0)
+		{
+			/* mask TxDataInt */
+			rt2860_int_disable(pAd, INT_HCCA_DLY);
+			tasklet_hi_schedule(&pObj->hcca_dma_done_task);
+		}
+		pAd->int_pending |= INT_HCCA_DLY;
+	}
+
+	if (IntSource.word & INT_AC3_DLY)
+	{
+
+		if ((pAd->int_disable_mask & INT_AC3_DLY) == 0)
+		{
+			/* mask TxDataInt */
+			rt2860_int_disable(pAd, INT_AC3_DLY);
+			tasklet_hi_schedule(&pObj->ac3_dma_done_task);
+		}
+		pAd->int_pending |= INT_AC3_DLY;
+	}
+
+	if (IntSource.word & INT_AC2_DLY)
+	{
+
+		if ((pAd->int_disable_mask & INT_AC2_DLY) == 0)
+		{
+			/* mask TxDataInt */
+			rt2860_int_disable(pAd, INT_AC2_DLY);
+			tasklet_hi_schedule(&pObj->ac2_dma_done_task);
+		}
+		pAd->int_pending |= INT_AC2_DLY;
+	}
+
+	if (IntSource.word & INT_AC1_DLY)
+	{
+
+		pAd->int_pending |= INT_AC1_DLY;
+
+		if ((pAd->int_disable_mask & INT_AC1_DLY) == 0)
+		{
+			/* mask TxDataInt */
+			rt2860_int_disable(pAd, INT_AC1_DLY);
+			tasklet_hi_schedule(&pObj->ac1_dma_done_task);
+		}
+
+	}
+
+	if (IntSource.word & INT_AC0_DLY)
+	{
+		pAd->int_pending |= INT_AC0_DLY;
+
+		if ((pAd->int_disable_mask & INT_AC0_DLY) == 0)
+		{
+			/* mask TxDataInt */
+			rt2860_int_disable(pAd, INT_AC0_DLY);
+			tasklet_hi_schedule(&pObj->ac0_dma_done_task);
+		}
+
+	}
+
+    if (IntSource.word & PreTBTTInt)
+	{
+		RTMPHandlePreTBTTInterrupt(pAd);
+	}
+
+	if (IntSource.word & TBTTInt)
+	{
+		RTMPHandleTBTTInterrupt(pAd);
+	}
+
+
+
+#ifdef CONFIG_STA_SUPPORT
+	IF_DEV_CONFIG_OPMODE_ON_STA(pAd)
+	{
+		if (IntSource.word & AutoWakeupInt)
+			RTMPHandleTwakeupInterrupt(pAd);
+	}
+#endif // CONFIG_STA_SUPPORT //
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+    return  IRQ_HANDLED;
+#endif
+
+}
+
+/*
+========================================================================
+Routine Description:
+    Check the chipset vendor/product ID.
+
+Arguments:
+    _dev_p				Point to the PCI or USB device
+
+Return Value:
+    TRUE				Check ok
+	FALSE				Check fail
+
+Note:
+========================================================================
+*/
+BOOLEAN RT28XXChipsetCheck(
+	IN void *_dev_p)
+{
+	/* always TRUE */
+	return TRUE;
+}
+
+
+/*
+========================================================================
+Routine Description:
+    Init net device structure.
+
+Arguments:
+    _dev_p				Point to the PCI or USB device
+    *net_dev			Point to the net device
+	*pAd				the raxx interface data pointer
+
+Return Value:
+    TRUE				Init ok
+	FALSE				Init fail
+
+Note:
+========================================================================
+*/
+BOOLEAN RT28XXNetDevInit(
+	IN void 				*_dev_p,
+	IN struct  net_device	*net_dev,
+	IN RTMP_ADAPTER 		*pAd)
+{
+	struct pci_dev *pci_dev = (struct pci_dev *)_dev_p;
+    CHAR	*print_name;
+    ULONG	csr_addr;
+
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
+    print_name = pci_dev ? pci_name(pci_dev) : "rt2860";
+#else
+    print_name = pci_dev ? pci_dev->slot_name : "rt2860";
+#endif // LINUX_VERSION_CODE //
+
+	net_dev->base_addr = 0;
+	net_dev->irq = 0;
+
+    if (pci_request_regions(pci_dev, print_name))
+        goto err_out_free_netdev;
+
+    // interrupt IRQ number
+    net_dev->irq = pci_dev->irq;
+
+    // map physical address to virtual address for accessing register
+    csr_addr = (unsigned long) ioremap(pci_resource_start(pci_dev, 0),
+										pci_resource_len(pci_dev, 0));
+
+    if (!csr_addr)
+    {
+        DBGPRINT(RT_DEBUG_ERROR,
+				("ioremap failed for device %s, region 0x%lX @ 0x%lX\n",
+				print_name, (ULONG)pci_resource_len(pci_dev, 0),
+				(ULONG)pci_resource_start(pci_dev, 0)));
+        goto err_out_free_res;
+    }
+
+    // Save CSR virtual address and irq to device structure
+    net_dev->base_addr = csr_addr;
+    pAd->CSRBaseAddress = (PUCHAR)net_dev->base_addr;
+
+    // Set DMA master
+    pci_set_master(pci_dev);
+
+    net_dev->priv_flags = INT_MAIN;
+
+    DBGPRINT(RT_DEBUG_TRACE, ("%s: at 0x%lx, VA 0x%lx, IRQ %d. \n",
+        	net_dev->name, (ULONG)pci_resource_start(pci_dev, 0),
+			(ULONG)csr_addr, pci_dev->irq));
+	return TRUE;
+
+
+	/* --------------------------- ERROR HANDLE --------------------------- */
+err_out_free_res:
+    pci_release_regions(pci_dev);
+err_out_free_netdev:
+	/* free netdev in caller, not here */
+	return FALSE;
+}
+
+
+/*
+========================================================================
+Routine Description:
+    Init net device structure.
+
+Arguments:
+    _dev_p				Point to the PCI or USB device
+	*pAd				the raxx interface data pointer
+
+Return Value:
+    TRUE				Config ok
+	FALSE				Config fail
+
+Note:
+========================================================================
+*/
+BOOLEAN RT28XXProbePostConfig(
+	IN void 				*_dev_p,
+	IN RTMP_ADAPTER 		*pAd,
+	IN INT32				argc)
+{
+	/* no use */
+	return TRUE;
+}
+
+
+/*
+========================================================================
+Routine Description:
+    Disable DMA.
+
+Arguments:
+	*pAd				the raxx interface data pointer
+
+Return Value:
+	None
+
+Note:
+========================================================================
+*/
+VOID RT28XXDMADisable(
+	IN RTMP_ADAPTER 		*pAd)
+{
+	WPDMA_GLO_CFG_STRUC     GloCfg;
+
+
+	RTMP_IO_READ32(pAd, WPDMA_GLO_CFG, &GloCfg.word);
+	GloCfg.word &= 0xff0;
+	GloCfg.field.EnTXWriteBackDDONE =1;
+	RTMP_IO_WRITE32(pAd, WPDMA_GLO_CFG, GloCfg.word);
+}
+
+
+/*
+========================================================================
+Routine Description:
+    Enable DMA.
+
+Arguments:
+	*pAd				the raxx interface data pointer
+
+Return Value:
+	None
+
+Note:
+========================================================================
+*/
+VOID RT28XXDMAEnable(
+	IN RTMP_ADAPTER 		*pAd)
+{
+	WPDMA_GLO_CFG_STRUC	GloCfg;
+	int i = 0;
+
+	RTMP_IO_WRITE32(pAd, MAC_SYS_CTRL, 0x4);
+	do
+	{
+		RTMP_IO_READ32(pAd, WPDMA_GLO_CFG, &GloCfg.word);
+		if ((GloCfg.field.TxDMABusy == 0)  && (GloCfg.field.RxDMABusy == 0))
+			break;
+
+		DBGPRINT(RT_DEBUG_TRACE, ("==>  DMABusy\n"));
+		RTMPusecDelay(1000);
+		i++;
+	}while ( i <200);
+
+	RTMPusecDelay(50);
+
+	GloCfg.field.EnTXWriteBackDDONE = 1;
+	GloCfg.field.WPDMABurstSIZE = 2;
+	GloCfg.field.EnableRxDMA = 1;
+	GloCfg.field.EnableTxDMA = 1;
+
+	DBGPRINT(RT_DEBUG_TRACE, ("<== WRITE DMA offset 0x208 = 0x%x\n", GloCfg.word));
+	RTMP_IO_WRITE32(pAd, WPDMA_GLO_CFG, GloCfg.word);
+
+}
+
+/*
+========================================================================
+Routine Description:
+    Write Beacon buffer to Asic.
+
+Arguments:
+	*pAd				the raxx interface data pointer
+
+Return Value:
+	None
+
+Note:
+========================================================================
+*/
+VOID RT28xx_UpdateBeaconToAsic(
+	IN RTMP_ADAPTER		*pAd,
+	IN INT				apidx,
+	IN ULONG			FrameLen,
+	IN ULONG			UpdatePos)
+{
+	ULONG				CapInfoPos = 0;
+	UCHAR  			*ptr, *ptr_update, *ptr_capinfo;
+	UINT  			i;
+	BOOLEAN			bBcnReq = FALSE;
+	UCHAR			bcn_idx = 0;
+
+	{
+		DBGPRINT(RT_DEBUG_ERROR, ("%s() : No valid Interface be found.\n", __FUNCTION__));
+		return;
+	}
+
+	if (bBcnReq == FALSE)
+	{
+		/* when the ra interface is down, do not send its beacon frame */
+		/* clear all zero */
+		for(i=0; i<TXWI_SIZE; i+=4)
+			RTMP_IO_WRITE32(pAd, pAd->BeaconOffset[bcn_idx] + i, 0x00);
+	}
+	else
+	{
+		ptr = (PUCHAR)&pAd->BeaconTxWI;
+#ifdef RT_BIG_ENDIAN
+		RTMPWIEndianChange(ptr, TYPE_TXWI);
+#endif
+		for (i=0; i<TXWI_SIZE; i+=4)  // 16-byte TXWI field
+		{
+			UINT32 longptr =  *ptr + (*(ptr+1)<<8) + (*(ptr+2)<<16) + (*(ptr+3)<<24);
+			RTMP_IO_WRITE32(pAd, pAd->BeaconOffset[bcn_idx] + i, longptr);
+			ptr += 4;
+		}
+
+		// Update CapabilityInfo in Beacon
+		for (i = CapInfoPos; i < (CapInfoPos+2); i++)
+		{
+			RTMP_IO_WRITE8(pAd, pAd->BeaconOffset[bcn_idx] + TXWI_SIZE + i, *ptr_capinfo);
+			ptr_capinfo ++;
+		}
+
+		if (FrameLen > UpdatePos)
+		{
+			for (i= UpdatePos; i< (FrameLen); i++)
+			{
+				RTMP_IO_WRITE8(pAd, pAd->BeaconOffset[bcn_idx] + TXWI_SIZE + i, *ptr_update);
+				ptr_update ++;
+			}
+		}
+
+	}
+
+}
+
+#ifdef CONFIG_STA_SUPPORT
+VOID RTMPInitPCIeLinkCtrlValue(
+	IN	PRTMP_ADAPTER	pAd)
+{
+}
+
+VOID RTMPFindHostPCIDev(
+    IN	PRTMP_ADAPTER	pAd)
+{
+}
+
+/*
+	========================================================================
+
+	Routine Description:
+
+	Arguments:
+		Level = RESTORE_HALT : Restore PCI host and Ralink PCIe Link Control field to its default value.
+		Level = Other Value : Restore from dot11 power save or radio off status. And force PCI host Link Control fields to 0x1
+
+	========================================================================
+*/
+VOID RTMPPCIeLinkCtrlValueRestore(
+	IN	PRTMP_ADAPTER	pAd,
+	IN   UCHAR		Level)
+{
+}
+
+/*
+	========================================================================
+
+	Routine Description:
+
+	Arguments:
+		Max : limit Host PCI and Ralink PCIe device's LINK CONTROL field's value.
+		Because now frequently set our device to mode 1 or mode 3 will cause problem.
+
+	========================================================================
+*/
+VOID RTMPPCIeLinkCtrlSetting(
+	IN	PRTMP_ADAPTER	pAd,
+	IN 	USHORT		Max)
+{
+}
+#endif // CONFIG_STA_SUPPORT //
+
+VOID rt2860_stop(struct net_device *net_dev)
+{
+    PRTMP_ADAPTER pAd = (PRTMP_ADAPTER)NULL;
+    if (net_dev == NULL)
+	{
+		DBGPRINT(RT_DEBUG_ERROR, ("net_dev == NULL!\n"));
+	}
+	else
+		pAd = (PRTMP_ADAPTER)net_dev->priv;
+
+	if (pAd != NULL)
+	{
+	    // stop interface
+		netif_carrier_off(net_dev);
+		netif_stop_queue(net_dev);
+
+		// mark device as removed from system and therefore no longer available
+		netif_device_detach(net_dev);
+
+		// mark halt flag
+		RTMP_SET_FLAG(pAd, fRTMP_ADAPTER_HALT_IN_PROGRESS);
+		RTMP_SET_FLAG(pAd, fRTMP_ADAPTER_RADIO_OFF);
+
+		// take down the device
+		rt28xx_close((PNET_DEV)net_dev);
+		RT_MOD_DEC_USE_COUNT();
+	}
+    return;
+}
+
+/*
+ * invaild or writeback cache
+ * and convert virtual address to physical address
+ */
+dma_addr_t linux_pci_map_single(void *handle, void *ptr, size_t size, int sd_idx, int direction)
+{
+	PRTMP_ADAPTER pAd;
+	POS_COOKIE pObj;
+
+	/*
+		------ Porting Information ------
+		> For Tx Alloc:
+			mgmt packets => sd_idx = 0
+			SwIdx: pAd->MgmtRing.TxCpuIdx
+			pTxD : pAd->MgmtRing.Cell[SwIdx].AllocVa;
+
+			data packets => sd_idx = 1
+	 		TxIdx : pAd->TxRing[pTxBlk->QueIdx].TxCpuIdx
+	 		QueIdx: pTxBlk->QueIdx
+	 		pTxD  : pAd->TxRing[pTxBlk->QueIdx].Cell[TxIdx].AllocVa;
+
+	 	> For Rx Alloc:
+	 		sd_idx = -1
+	*/
+
+	pAd = (PRTMP_ADAPTER)handle;
+	pObj = (POS_COOKIE)pAd->OS_Cookie;
+
+	if (sd_idx == 1)
+	{
+		PTX_BLK		pTxBlk;
+		pTxBlk = (PTX_BLK)ptr;
+		return pci_map_single(pObj->pci_dev, pTxBlk->pSrcBufData, pTxBlk->SrcBufLen, direction);
+	}
+	else
+	{
+		return pci_map_single(pObj->pci_dev, ptr, size, direction);
+	}
+
+}
+
+void linux_pci_unmap_single(void *handle, dma_addr_t dma_addr, size_t size, int direction)
+{
+	PRTMP_ADAPTER pAd;
+	POS_COOKIE pObj;
+
+	pAd=(PRTMP_ADAPTER)handle;
+	pObj = (POS_COOKIE)pAd->OS_Cookie;
+
+	pci_unmap_single(pObj->pci_dev, dma_addr, size, direction);
+
+}
+