strip the kernel version suffix from target directories, except for brcm-2.4 (the -2.4 will be included in the board name here). CONFIG_LINUX_<ver>_<board> becomes CONFIG_TARGET_<board>, same for profiles.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8653 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 3074 insertions, 0 deletions

diff --git a/target/linux/amazon/files/drivers/atm/amazon_tpe.c b/target/linux/amazon/files/drivers/atm/amazon_tpe.c
new file mode 100644
index 000000000..cf3e40732
--- /dev/null
+++ b/target/linux/amazon/files/drivers/atm/amazon_tpe.c
@@ -0,0 +1,3074 @@
+/*
+ *   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.
+ */
+//-----------------------------------------------------------------------
+/*
+ * Description:
+ *	Driver for Infineon Amazon TPE
+ */
+//-----------------------------------------------------------------------
+/* Author:	peng.liu@infineon.com
+ * Created:	12-April-2004
+ */
+//-----------------------------------------------------------------------
+/* History
+ * Last changed on: 13 Oct. 2004
+ * Last changed by: peng.liu@infineon.com
+ * Last changed on: 28 Jan. 2004
+ * Last changed by: peng.liu@infineon.com
+ * Last changed Reason:
+ *	- AAL5R may send more bytes than expected in MFL (so far, confirmed as 64 bytes)
+ */
+// 507261:tc.chen 2005/07/26 re-organize code address map to improve performance.
+// 507281:tc.chen 2005/07/28 fix f4 segment isssue
+/* 511045:linmars 2005/11/04 from Liu.Peng: change NRT_VBR bandwidth calculation based on scr instead of pcr */
+ 
+#ifndef __KERNEL__
+#define __KERNEL__
+#endif 
+#ifndef EXPORT_SYMTAB
+#define EXPORT_SYMTAB
+#endif
+
+/*TPE level loopback, bypass AWARE DFE */
+#undef TPE_LOOPBACK
+
+/* enable debug options */			
+#undef AMAZON_ATM_DEBUG
+
+/* enable rx error packet analysis */
+#undef AMAZON_ATM_DEBUG_RX
+
+/* test AAL5 Interrupt */
+#undef  AMAZON_TPE_TEST_AAL5_INT
+
+/* dump packet */
+#undef AMAZON_TPE_DUMP
+
+/* read ARC register*/
+/* this register is located in side DFE module*/
+#undef AMAZON_TPE_READ_ARC
+
+/* software controlled reassembly */
+#undef AMAZON_TPE_SCR
+
+/* recovery from AAL5 bug */
+#undef AMAZON_TPE_AAL5_RECOVERY
+
+#if defined(AMAZON_TPE_READ_ARC) || defined(AMAZON_TPE_AAL5_RECOVERY)
+#define ALPHAEUS_BASE_ADDR	0x31c00
+#define A_CFG_ADDR		(ALPHAEUS_BASE_ADDR+0x04)
+#define AR_CB0_STATUS_ADDR		(ALPHAEUS_BASE_ADDR+0x2c)
+#define AR_CB1_STATUS_ADDR		(ALPHAEUS_BASE_ADDR+0x30)
+#define AT_CELL0_ADDR		(ALPHAEUS_BASE_ADDR+0x90)
+#define AR_CELL0_ADDR		(ALPHAEUS_BASE_ADDR+0x1a0)
+#define AR_CD_CNT0_ADDR		(ALPHAEUS_BASE_ADDR+0x1c8)
+#endif
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h> 
+#include <linux/slab.h>  
+#include <linux/fs.h> 
+#include <linux/types.h>
+#include <linux/errno.h>  
+#include <linux/time.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/netdevice.h>
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/atomic.h>
+#include <asm/bitops.h>
+#include <asm/system.h>
+
+#include <asm/amazon/amazon.h>
+#include <asm/amazon/irq.h>
+
+#include <linux/in.h>
+#include <linux/netdevice.h> 
+#include <linux/etherdevice.h> 
+#include <linux/ip.h>
+#include <linux/tcp.h> 
+#include <linux/skbuff.h>
+#include <linux/in6.h>
+#include <linux/delay.h>
+#include <asm/amazon/atm_defines.h>
+#include <asm/amazon/amazon_dma.h>
+#include <asm/amazon/amazon_tpe.h>
+
+#if defined(AMAZON_TPE_READ_ARC) || defined(AMAZON_TPE_AAL5_RECOVERY)
+#include <asm/amazon/amazon_mei.h>
+#include <asm/amazon/amazon_mei_app.h>
+#endif
+
+#define AMAZON_TPE_EMSG(fmt, args...) printk( KERN_ERR  "%s: " fmt,__FUNCTION__, ## args)
+
+/***************************************** External Functions *******************************************/
+extern unsigned int amazon_get_fpi_hz(void);
+extern void mask_and_ack_amazon_irq(unsigned int irq_nr);
+extern void amz_push_oam(unsigned char *);
+
+//amazon_mei.c
+#if defined(AMAZON_TPE_READ_ARC) || defined(AMAZON_TPE_AAL5_RECOVERY)
+extern MEI_ERROR meiDebugRead(u32 srcaddr, u32 *databuff, u32 databuffsize);
+extern MEI_ERROR meiDebugWrite(u32 destaddr, u32 *databuff, u32 databuffsize);
+#endif
+
+/***************************************** Internal Functions *******************************************/
+int amazon_atm_read_procmem(char *buf, char **start, off_t offset,int count, int *eof, void *data);
+/***************************************** Global Data *******************************************/
+amazon_atm_dev_t g_atm_dev;		//device data
+static struct tq_struct swex_start_task;	//BH task
+static struct tq_struct swex_complete_task;	//BH task
+#ifdef AMAZON_TPE_SCR
+static struct tq_struct a5r_task; 		//BH task
+#endif
+static struct dma_device_info 	g_dma_dev;	//for DMA
+static struct atm_dev * amazon_atm_devs[AMAZON_ATM_PORT_NUM];
+static struct oam_last_activity g_oam_time_stamp[AMAZON_ATM_MAX_VCC_NUM];
+static u8 g_oam_cell[AMAZON_AAL0_SDU+4];	//for OAM cells
+#ifdef AMAZON_CHECK_LINK
+static int adsl_link_status;			//ADSL link status, 0:down, 1:up
+#endif //AMAZON_CHECK_LINK
+/***************************************** Module Parameters *************************************/
+// Parameter Definition for module
+static int port_enable0 = 1;				// Variable for parameter port_enable0
+static int port_enable1 = 0;				// Variable for parameter port_enable1
+static int port_max_conn0 = 15;				// Variable for parameter port_max_conn0
+static int port_max_conn1 = 0;				// Variable for parameter port_max_conn1
+static int port_cell_rate_up0 = 7500;			// Variable for parameter port_cell_rate_up0
+static int port_cell_rate_up1 = 7500;			// Variable for parameter port_cell_rate_up1
+
+
+static int qsb_tau = 1;					// Variable for parameter qsb_tau
+static int qsb_srvm = 0xf;				// Variable for parameter qsb_srvm
+static int qsb_tstep = 4 ;				// Variable for parameter qsb_tstep
+
+static int cbm_nrt = 3900;				// Variable for parameter cbm_nrt
+static int cbm_clp0 =3500;				// Variable for parameter cbm_clp0
+static int cbm_clp1 =3200;				// Variable for parameter cbm_clp1
+static int cbm_free_cell_no = AMAZON_ATM_FREE_CELLS;	// Variable for parameter cbm_free_cell_no
+
+static int a5_fill_pattern = 0x7e;			// Variable for parameter a5_fill_pattern '~'
+static int a5s_mtu = 0x700;				// mtu for tx
+static int a5r_mtu = 0x700;				// mtu for rx
+
+static int oam_q_threshold = 	64;			// oam queue threshold, minium value 64
+static int rx_q_threshold = 	1000;			// rx queue threshold, minium value 64
+static int tx_q_threshold = 	800;			// tx queue threshold, minium value 64
+
+MODULE_PARM(port_max_conn0, "i");
+MODULE_PARM_DESC(port_max_conn0, "Maximum atm connection for port #0");
+MODULE_PARM(port_max_conn1, "i");
+MODULE_PARM_DESC(port_max_conn1, "Maximum atm connection for port #1");
+MODULE_PARM(port_enable0, "i");
+MODULE_PARM_DESC(port_enable0, "0 -> port disabled, 1->port enabled");
+MODULE_PARM(port_enable1, "i");
+MODULE_PARM_DESC(port_enable1, "0 -> port disabled, 1->port enabled");
+MODULE_PARM(port_cell_rate_up0, "i");
+MODULE_PARM_DESC(port_cell_rate_up0, "ATM port upstream rate in cells/s");
+MODULE_PARM(port_cell_rate_up1, "i");
+MODULE_PARM_DESC(port_cell_rate_up1, "ATM port upstream rate in cells/s");
+
+MODULE_PARM(qsb_tau,"i");
+MODULE_PARM_DESC(qsb_tau, "Cell delay variation. value must be > 0");
+MODULE_PARM(qsb_srvm, "i");
+MODULE_PARM_DESC(qsb_srvm, "Maximum burst size");
+MODULE_PARM(qsb_tstep, "i");
+MODULE_PARM_DESC(qsb_tstep, "n*32 cycles per sbs cycles n=1,2,4");
+
+MODULE_PARM(cbm_nrt, "i");
+MODULE_PARM_DESC(cbm_nrt, "Non real time threshold for cell buffer");
+MODULE_PARM(cbm_clp0, "i");
+MODULE_PARM_DESC(cbm_clp0, "Threshold for cells with cell loss priority 0");
+MODULE_PARM(cbm_clp1, "i");
+MODULE_PARM_DESC(cbm_clp1, "Threshold for cells with cell loss priority 1");
+MODULE_PARM(cbm_free_cell_no, "i");
+MODULE_PARM_DESC(cbm_free_cell_no, "Number of cells in the cell buffer manager");
+
+MODULE_PARM(a5_fill_pattern, "i");
+MODULE_PARM_DESC(a5_fill_pattern, "filling pattern (PAD) for aal5 frames");
+MODULE_PARM(a5s_mtu, "i");
+MODULE_PARM_DESC(a5s_mtu, "max. SDU for upstream");
+MODULE_PARM(a5r_mtu, "i");
+MODULE_PARM_DESC(a5r_mtu, "max. SDU for downstream");                                                                               
+
+MODULE_PARM(oam_q_threshold, "i");
+MODULE_PARM_DESC(oam_q_threshold, "oam queue threshold");
+
+MODULE_PARM(rx_q_threshold, "i");
+MODULE_PARM_DESC(rx_q_threshold, "downstream/rx queue threshold");
+
+MODULE_PARM(tx_q_threshold, "i");
+MODULE_PARM_DESC(tx_q_threshold, "upstream/tx queue threshold");
+
+/***************************************** local functions *************************************/
+/* Brief: valid QID
+ * Return: 1 if valid
+ * 	   0 if not
+ */
+static inline int valid_qid(int qid)
+{
+	return ( (qid>0) && (qid<AMAZON_ATM_MAX_QUEUE_NUM));
+}
+
+/*
+ * Brief: align to 16 bytes boundary 
+ * Parameter:
+ *	skb
+ * Description:
+ *	use skb_reserve to adjust the data pointer
+ *	don't change head pointer
+ *	pls allocate extrac 16 bytes before call this function
+ */
+static void inline alloc_align_16(struct sk_buff * skb)
+{
+	if ( ( ((u32) (skb->data)) & 15) != 0){
+		AMAZON_TPE_DMSG("need to adjust the alignment manually\n");
+		skb_reserve(skb, 16 - (((u32) (skb->data)) & 15) );
+	}
+
+}
+
+/*
+ * Brief: initialize the device according to the module paramters
+ * Return: not NULL	-	ok
+ *	   NULL		-	fails
+ * Description: arrange load parameters and call the hardware initialization routines
+ */
+static void atm_init_parameters(amazon_atm_dev_t *dev)
+{
+	//port setting
+	dev->ports[0].enable = port_enable0;
+	dev->ports[0].max_conn = port_max_conn0;
+	dev->ports[0].tx_max_cr = port_cell_rate_up0;
+	if (port_enable1){
+		dev->ports[1].enable = port_enable1;
+		dev->ports[1].max_conn = port_max_conn1;
+		dev->ports[1].tx_max_cr = port_cell_rate_up1;
+	}
+
+	//aal5
+	dev->aal5.padding_byte = a5_fill_pattern;
+	dev->aal5.tx_max_sdu = a5s_mtu;
+	dev->aal5.rx_max_sdu = a5r_mtu;
+
+	//cbm
+	dev->cbm.nrt_thr = cbm_nrt;
+	dev->cbm.clp0_thr = cbm_clp0;
+	dev->cbm.clp1_thr = cbm_clp1;
+	dev->cbm.free_cell_cnt = cbm_free_cell_no;
+
+	//qsb
+	dev->qsb.tau = qsb_tau;
+	dev->qsb.tstepc =qsb_tstep;
+	dev->qsb.sbl = qsb_srvm;
+	
+	//allocate on the fly
+	dev->cbm.mem_addr = NULL;
+	dev->cbm.qd_addr = NULL;
+}
+
+
+/*	Brief: 		Find QID for VCC
+ *	Parameters:	vcc	- VCC data structure
+ *  	Return Value:	-EINVAL		- VCC not found
+ *			qid		- QID for this VCC
+ *	Description:
+ *	This function returns the QID of a given VCC
+ */
+static int amazon_atm_get_queue(struct atm_vcc* vcc)
+{
+	int	i;
+	for (i=0;i<AMAZON_ATM_MAX_QUEUE_NUM;i++) {
+		if (g_atm_dev.queues[i].vcc == vcc) return i;
+	}
+	return -EINVAL;
+}
+
+
+/*
+ *	Brief: 		Find QID for VPI/VCI
+ *	Parameters:	vpi	- VPI to found
+ *			vci	- VCI to found
+ *
+ *  	Return Value:	-EINVAL		- VPI/VCI not found
+ *			qid		- QID for this VPI/VCI
+ *
+ *	Description:
+ *	This function returns the QID for a given VPI/VCI. itf doesn't matter
+ */
+static int amazon_atm_find_vpivci(u8 vpi, u16 vci)
+{
+	int	i;
+	struct atm_vcc * vcc;
+	for (i=0;i<AMAZON_ATM_MAX_QUEUE_NUM;i++) {
+		if ( (vcc = g_atm_dev.queues[i].vcc)!= NULL) {
+			if ((vcc->vpi == vpi) && (vcc->vci == vci)) return i;
+		}
+	}
+	return -EINVAL;
+}
+
+/*	Brief: 		Find QID for VPI
+ *	Parameters:	vpi	- VPI to found
+ *  	Return Value:	-EINVAL		- VPI not found
+ *			qid		- QID for this VPI
+ *
+ *	Description:
+ *	This function returns the QID for a given VPI. itf and VCI don't matter
+ */
+static int amazon_atm_find_vpi(u8 vpi)
+{
+	int	i;
+	for (i=0;i<AMAZON_ATM_MAX_QUEUE_NUM;i++) {
+		if ( g_atm_dev.queues[i].vcc!= NULL) {
+			if (g_atm_dev.queues[i].vcc->vpi == vpi) return i;
+		}
+	}
+	return -EINVAL;
+}
+
+/*
+ *	Brief: 		Clears QID entries for VCC
+ *
+ *	Parameters:	vcc	- VCC to found
+ *
+ *	Description:
+ *	This function searches for the given VCC and sets it to NULL if found.
+ */
+static inline void amazon_atm_clear_vcc(int i)
+{
+	g_atm_dev.queues[i].vcc = NULL;
+	g_atm_dev.queues[i].free = 1;
+}
+
+
+/*
+ * Brief:	dump skb data
+ */
+static inline void dump_skb(u32 len, char * data)
+{
+#ifdef AMAZON_TPE_DUMP
+	int i;
+	for(i=0;i<len;i++){	
+		printk("%2.2x ",(u8)(data[i]));
+		if (i % 16 == 15)
+			printk("\n");
+	}
+	printk("\n");
+#endif
+}
+
+/*
+ * Brief:	dump queue descriptor
+ */
+static inline void dump_qd(int qid)
+{
+#ifdef AMAZON_TPE_DUMP
+	u8 * qd_addr;
+	if (valid_qid(qid) != 1) return;
+	qd_addr = (u8 *) KSEG1ADDR((unsigned long)g_atm_dev.cbm.qd_addr);
+	AMAZON_TPE_EMSG("qid: %u [%8x][%8x][%8x][%8x]\n", qid
+		,readl(qd_addr+qid*CBM_QD_SIZE+0x0)
+		,readl(qd_addr+qid*CBM_QD_SIZE+0x4)
+		,readl(qd_addr+qid*CBM_QD_SIZE+0x8)
+		,readl(qd_addr+qid*CBM_QD_SIZE+0xc));
+#endif
+}
+
+/*
+ * Brief:	release TX skbuff
+ */
+static inline void amazon_atm_free_tx_skb_vcc(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+	if ( vcc->pop != NULL) {
+		vcc->pop(vcc, skb);
+	 } else {
+	 	dev_kfree_skb_any(skb);
+        }
+}
+/*
+ * Brief:	release TX skbuff
+ */
+static inline void amazon_atm_free_tx_skb(struct sk_buff *skb)
+{
+	struct atm_vcc* vcc = ATM_SKB(skb)->vcc;
+	if (vcc!=NULL){
+		amazon_atm_free_tx_skb_vcc(vcc,skb);
+	} else {
+		dev_kfree_skb_any(skb);//fchang:Added
+	}
+}
+
+/* Brief:	divide by 64 and round up
+ */
+static inline u32 divide_by_64_round_up(int input)
+{
+	u32 tmp1;
+	tmp1 = (u32) input;
+        tmp1 = (tmp1%64)?(tmp1/64 + 1): (tmp1/64);
+        if (tmp1 == 0) tmp1 = 1;
+	return tmp1;
+}
+
+/*
+ * Brief:	statistics
+ */
+#ifdef AMAZON_ATM_DEBUG
+static inline void queue_statics(int qid, qs_t idx)
+{
+	if (valid_qid(qid)){
+		g_atm_dev.queues[qid].qs[idx]++;
+	}
+}
+#else	//not AMAZON_ATM_DEBUG
+static inline void queue_statics(int qid, qs_t idx){}
+#endif	//AMAZON_ATM_DEBUG		
+
+
+/*	Brief:	set dma tx full, i.e. there is no available descriptors
+ */
+static void inline atm_dma_full(void)
+{
+	AMAZON_TPE_DMSG("ch0 is full\n");
+	atomic_set(&g_atm_dev.dma_tx_free_0,0);
+}
+
+/*
+ *	Brief	set dma tx free (at least one descript is available)
+ */
+inline static void atm_dma_free(void)
+{
+	AMAZON_TPE_DMSG("ch0 is free\n");
+	atomic_set(&g_atm_dev.dma_tx_free_0,1);
+}
+
+
+/*	Brief:		return the status of DMA TX descriptors
+ *	Parameters:	TX channel  (DMA_TX_CH0, TX_CH1)
+ *	Return:
+ *		1:	there are availabel TX descriptors
+ *		0:	no available
+ *	Description:
+ *
+ */
+inline int dma_may_send(int ch)
+{
+	if (atomic_read(&g_atm_dev.dma_tx_free_0)){
+		return 1;
+	}
+	return 0;
+}
+
+/******************************* global functions *********************************/ 
+/*
+ *	Brief: 		SWIE Cell Extraction Start Routine
+ *			and task routine for swex_complete_task
+ *	Parameters:	irq_stat	- interrupt status
+ *
+ *	Description:
+ *	This is the routine for extracting cell. It will schedule itself if the hardware is busy.
+ *	This routine runs in interrupt context
+ */
+void amazon_atm_swex(void * irq_stat)
+{
+	u32 ex_stat=0;
+	u32 addr;
+	// Read extraction status register
+	ex_stat = readl(CBM_HWEXSTAT0_ADDR);
+
+	// Check if extraction/insertion is in progress 
+	if ( (ex_stat & CBM_EXSTAT_SCB) || (ex_stat & CBM_EXSTAT_FB) || (test_and_set_bit(SWIE_LOCK, &(g_atm_dev.swie.lock))!=0)) {
+		AMAZON_TPE_DMSG(" extraction in progress. Will wait\n");
+		swex_start_task.data = irq_stat;
+		queue_task(&swex_start_task, &tq_immediate);
+		mark_bh(IMMEDIATE_BH);
+	}else {
+		// Extract QID
+		g_atm_dev.swie.qid = (((u32)irq_stat) >> 24);
+		AMAZON_TPE_DMSG("extracting from qid=%u\n",g_atm_dev.swie.qid);
+		//read status word
+		addr = KSEG1ADDR((unsigned long)g_atm_dev.cbm.qd_addr);
+		addr = readl((addr + g_atm_dev.swie.qid * 0x10 + 4) & 0xFFFFFFC0);
+		addr = KSEG1ADDR(addr);
+		g_atm_dev.swie.sw = readl(addr+52)&SWIE_ADDITION_DATA_MASK;
+		AMAZON_TPE_DMSG("cell addition word: %8x \n", g_atm_dev.swie.sw);
+		
+		// Start extraction
+		AMAZON_WRITE_REGISTER_L(g_atm_dev.swie.qid | SWIE_CBM_PID_SUBADDR, CBM_HWEXPAR0_ADDR);
+		AMAZON_WRITE_REGISTER_L(SWIE_CBM_SCE0, CBM_HWEXCMD_ADDR);
+	}
+}
+#ifdef AMAZON_TPE_SCR
+u32 g_a5r_wait=0;
+/*
+ *	Brief: 		AAL5 Packet Extraction Routine	and task routine for a5r_task
+ *	Parameters:	irq_stat	- interrupt status
+ *
+ *	Description:
+ *	This is the routine for extracting frame. It will schedule itself if the hardware is busy.
+ *	This routine runs in interrupt context
+ */
+void amazon_atm_a5r(void* qid)
+{
+	volatile u32 ex_stat=0;
+	u32 addr;
+	u32 a5r_wait=0;
+
+	ex_stat = readl(CBM_HWEXSTAT0_ADDR);
+#if 0
+	// Check if extraction/insertion is in progress 
+	if ( (ex_stat & CBM_EXSTAT_SCB) || (ex_stat & CBM_EXSTAT_FB) ) {
+		AMAZON_TPE_DMSG(" extraction in progress. Will wait\n");
+		a5r_task.data = qid;
+		queue_task(&a5r_task, &tq_immediate);
+		mark_bh(IMMEDIATE_BH);
+	}else {
+		AMAZON_TPE_DMSG("extracting from qid=%u\n",(u8)qid);
+		// Start extraction
+		AMAZON_WRITE_REGISTER_L(((u8)qid) | CBM_HWEXPAR_PN_A5, CBM_HWEXPAR0_ADDR);
+		AMAZON_WRITE_REGISTER_L(CBM_HWEXCMD_FE0, CBM_HWEXCMD_ADDR);
+	}
+#else
+	//while ( (ex_stat & CBM_EXSTAT_SCB) || (ex_stat & CBM_EXSTAT_FB) ) {
+	while ( ex_stat != 0x80){
+		a5r_wait++;
+		ex_stat = readl(CBM_HWEXSTAT0_ADDR);
+#if	0
+		if (a5r_wait >= 0xffffff){
+			a5r_wait=0;
+			printk(".");
+		}
+#endif
+	}
+	if (a5r_wait > g_a5r_wait){
+		g_a5r_wait = a5r_wait;
+	}
+	AMAZON_WRITE_REGISTER_L(((u8)qid) | CBM_HWEXPAR_PN_A5, CBM_HWEXPAR0_ADDR);
+	AMAZON_WRITE_REGISTER_L(CBM_HWEXCMD_FE0, CBM_HWEXCMD_ADDR);
+#endif
+}
+
+#endif //AMAZON_TPE_SCR
+
+/*	Brief:	Handle F4/F5 OAM cell
+ *	Return:
+ *		0	ok
+ *		<0	fails
+ */
+static int inline amazon_handle_oam_cell(void *data, u8 vpi, u16 vci,u32 status)
+{
+	struct atm_vcc*		vcc=NULL;
+	int qid;
+	if (!status&SWIE_EOAM_MASK){
+		AMAZON_TPE_EMSG("unknown cell received, discarded\n");
+		goto amazon_handle_oam_cell_err_exit;
+	}else if (status&SWIE_ECRC10ERROR_MASK){
+		AMAZON_TPE_EMSG("CRC-10 Error Status:%8x, discarded\n", status);
+		goto amazon_handle_oam_cell_err_exit;
+	}else{
+		if(status & (SWIE_EVCI3_MASK |SWIE_EVCI4_MASK)){
+			//F4 level (VPI) OAM, Assume duplex
+			qid = amazon_atm_find_vpi(vpi)+CBM_RX_OFFSET;
+		}else if (status & (SWIE_EPTI4_MASK|SWIE_EPTI5_MASK)){
+			//F5 level (VCI) OAM, Assume duplex
+			qid = amazon_atm_find_vpivci(vpi,vci)+CBM_RX_OFFSET;			
+		}else{
+			qid = -1;
+			AMAZON_TPE_EMSG("non-F4/F5 OAM cells?, discarded\n");
+			goto amazon_handle_oam_cell_err_exit;
+		}
+	}
+	if (valid_qid(qid) && ((vcc = g_atm_dev.queues[qid].vcc)!=NULL)){
+		//TODO, should we do this for ALL OAM types? (Actually only User and CC)
+		g_atm_dev.queues[qid].access_time=xtime;
+		if (vcc->push_oam){
+			(*vcc->push_oam)(vcc,data);
+		}else{
+			amz_push_oam(data);
+		}
+	}else{
+		AMAZON_TPE_EMSG("no VCC yet\n");
+		goto amazon_handle_oam_cell_err_exit;
+	}
+	return 0;
+amazon_handle_oam_cell_err_exit:	
+	dump_skb(AMAZON_AAL0_SDU,(char *)data);	
+	return -1;
+}
+
+/*	Brief:	SWIE Cell Extraction Finish Routine 
+ *		and task routine for swex_complete_task
+ *	Description:
+ *	1.Allocate a buffer of type struct sk_buff
+ *	2.Copy the data from the temporary memory to this buffer
+ *	3.Push the data to upper layer
+ * 	4.Update the statistical data if necessary
+ *	5.Release the temporary data
+
+ */
+void amazon_atm_swex_push(void * data)
+{
+	struct atm_vcc*		vcc=NULL;
+	struct sk_buff*		skb=NULL;
+	struct amazon_atm_cell_header * cell_header;
+	u32 status;
+	int qid;
+	if (!data){
+		AMAZON_TPE_EMSG("data is NULL\n");
+		return;
+	}
+	qid = ((u8*)data)[AMAZON_AAL0_SDU];
+	status = ((u32*)data)[ATM_AAL0_SDU/4];
+	cell_header = (struct amazon_atm_cell_header *) data;
+	if (valid_qid(qid) != 1){
+		AMAZON_TPE_EMSG("error qid: %u\n",qid);
+		AMAZON_TPE_EMSG("unknown cells recieved\n");
+	}else if (qid == AMAZON_ATM_OAM_Q_ID){
+		//OAM or RM or OTHER cell
+		//Find real connection
+		
+#ifdef IKOS_MINI_BOOT	
+		//for OAM loop back test
+		dump_skb(56,(char *)data);
+		//kfree(data);	using g_oam_cell
+		return;
+#endif //IKOS_MINI_BOOT				
+#ifdef TPE_LOOPBACK					
+		amz_push_oam(data);
+		return;
+#endif//TPE_LOOPBACK
+		int ret = 0;
+		ret = amazon_handle_oam_cell(data,cell_header->bit.vpi,cell_header->bit.vci,status);
+		if (ret == 0)
+					return;
+				}else{
+		//should be normal AAL0 cells
+		// Get VCC
+		vcc = g_atm_dev.queues[qid].vcc;
+		if (vcc != NULL) {
+			AMAZON_TPE_DMSG("push to upper layer\n");
+			skb = dev_alloc_skb(AMAZON_AAL0_SDU);
+			if (skb != NULL) {
+				//skb->dev=vcc->dev;
+				memcpy(skb_put(skb, AMAZON_AAL0_SDU), data, AMAZON_AAL0_SDU);
+				skb->stamp = xtime;
+				ATM_SKB(skb)->vcc = vcc;
+				(*g_atm_dev.queues[qid].push)(vcc,skb,0);
+			}else{
+				AMAZON_TPE_EMSG(" No memory left for incoming AAL0 cell! Cell discarded!\n");
+				//inform the upper layer
+				(*g_atm_dev.queues[qid].push)(vcc,skb,-ENOMEM);
+				atomic_inc(&vcc->stats->rx_drop);
+			}
+		}else{
+			AMAZON_TPE_EMSG("invalid qid %u\n",qid);
+		}
+	}
+	//kfree(data);	using g_oam_cell
+}
+
+/*
+ *	Brief: 		Interrupt handler for software cell extraction (done)
+ *	Parameters:	irq	- CPPN for this interrupt
+ *			data	- Device ID for this interrupt
+ *			regs	- Register file
+ *
+ *	Description:
+ *	When a software extraction is finished this interrupt is issued.
+ *	It reads the cell data and sends it to the ATM stack.
+ */
+void amazon_atm_swex_isr(int irq, void *data, struct pt_regs *regs)
+{
+	u32 * cell = NULL;
+	int i;
+	//ATM_AAL0 SDU + QID
+	AMAZON_TPE_DMSG("SWIE extraction done\n");
+	cell = (u32 *) g_oam_cell;
+	if (cell != NULL){
+		//convert to host byte order from big endian
+		for(i=0;i<ATM_AAL0_SDU;i+=4){
+			cell[i/4]=readl(SWIE_ECELL_ADDR+i);	
+		}
+		cell[ATM_AAL0_SDU/4]= g_atm_dev.swie.sw;
+		((u8*)cell)[AMAZON_AAL0_SDU] = g_atm_dev.swie.qid;
+#ifdef IKOS_MINI_BOOT
+	for(i=0;i<ATM_AAL0_SDU;i+=4){
+		AMAZON_TPE_DMSG("[%2x][%2x][%2x][%2x]\n",
+			((char*)cell)[i],
+			((char*)cell)[i+1],
+			((char*)cell)[i+2],
+			((char*)cell)[i+3]
+			);
+	}
+	AMAZON_TPE_DMSG("qid: %u\n", ((u8*)cell)[AMAZON_AAL0_SDU]);
+	amazon_atm_swex_push((void *) cell);
+#else //not IKOS_MINI_BOOT
+	swex_complete_task.data = cell;
+	queue_task(&swex_complete_task,&tq_immediate);
+	mark_bh(IMMEDIATE_BH);
+#endif //not IKOS_MINI_BOOT
+	}else{
+		AMAZON_TPE_EMSG("no memory for receiving AAL0 cell\n");
+	}
+	
+	/* release the lock and check */
+	if (test_and_clear_bit(SWIE_LOCK,&(g_atm_dev.swie.lock)) == 0){
+		AMAZON_TPE_EMSG("swie lock is already released\n");
+	}
+	wake_up(&g_atm_dev.swie.sleep);
+}
+/*	Brief: 		Interrupt handler for software cell insertion
+ *
+ *	Parameters:	irq	- CPPN for this interrupt
+ *			data	- Device ID for this interrupt
+ *			regs	- Register file
+ *
+ *	Description:
+ *	When a software insertion is finished this interrupt is issued.
+ *	The only purpose is to release the semaphore and read the status register.
+ */
+void amazon_atm_swin_isr(int irq, void *data, struct pt_regs *regs)
+{
+	AMAZON_TPE_DMSG("SWIE insertion done\n");
+	/* release the lock and check */
+	if (test_and_clear_bit(SWIE_LOCK,&(g_atm_dev.swie.lock)) == 0){
+		AMAZON_TPE_EMSG("swie lock is already released");
+	}
+	// Release semaphore
+	up(&g_atm_dev.swie.in_sem);
+
+}
+/*	Brief: 		Interrupt handler for software cell insertion & extraction
+ *	Parameters:	irq	- CPPN for this interrupt
+ *			data	- Device ID for this interrupt
+ *			regs	- Register file
+ *	Description:
+ *	When a software insertion or extractionis finished this interrupt is issued.
+ */
+void amazon_atm_swie_isr(int irq, void *data, struct pt_regs *regs)
+{
+	u32	status=0;
+	// Read status register
+	status = readl(SWIE_ISTAT_ADDR);
+	AMAZON_TPE_DMSG("insertion status: %8x\n", status);
+	if (status & SWIE_ISTAT_DONE){
+		//clear interrupt in peripheral and ICU
+		AMAZON_WRITE_REGISTER_L(SRC_TOS_MIPS | SRC_CLRR|SRC_SRE_ENABLE | AMAZON_SWIE_INT, SWIE_ISRC_ADDR);
+		mask_and_ack_amazon_irq(AMAZON_SWIE_INT);
+		
+		amazon_atm_swin_isr(irq,data,regs);
+	}
+	status = readl(SWIE_ESTAT_ADDR);
+	AMAZON_TPE_DMSG("extraction status: %8x\n", status);
+	if (status & SWIE_ESTAT_DONE){
+		//clear interrupt
+		AMAZON_WRITE_REGISTER_L(SRC_TOS_MIPS | SRC_CLRR|SRC_SRE_ENABLE | AMAZON_SWIE_INT, SWIE_ESRC_ADDR);
+		mask_and_ack_amazon_irq(AMAZON_SWIE_INT);
+		
+		amazon_atm_swex_isr(irq,data,regs);
+	}
+	//clear interrupt in ICU
+}
+ 
+/*
+ *	Brief: 		Insert ATM cell into CBM
+ *	Parameters:	queue	- Target queue
+ *			cell	- Pointer to cell data
+ *  	Return Value:	EBUSY		- CBM is busy
+ *			0		- OK, cell inserted
+ *	Description:
+ *	This function inserts a cell into the CBM using the software insertion
+ *	method. The format of the cell should be
+ *	Little Endian (address starting from 0)
+ *		H3, H2, H1, H0, P3, P2, P1, P0, P7, P6, P5, P4, ..., P47, P46, P45, P44
+ *	Big Endian (address starting from 0)
+ *		H0, H1, H2, H3, P0, P1, P2, P3, P4, P5, P6, P7, ..., P44, P45, P46, P47
+ *	This function does not free memory!!!
+ */
+int amazon_atm_swin(u8 queue, void* cell)
+{
+	u32	status=0;
+	int i;
+	// Read status register
+	status = readl(SWIE_ISTAT_ADDR);
+	AMAZON_TPE_DMSG(" SWIE status=0x%08x\n",status);
+
+	AMAZON_TPE_DMSG(" Inserting cell qid=%u\n",queue);
+	
+#ifdef AMAZON_CHECK_LINK
+	if (adsl_link_status == 0){
+		return -EFAULT;	
+	}
+#endif //AMAZON_CHECK_LINK
+
+	// Get semaphore (if possible)
+	if (down_interruptible(&g_atm_dev.swie.in_sem)) {
+		return -ERESTARTSYS;
+	}
+	/* try to set lock */
+	wait_event_interruptible(g_atm_dev.swie.sleep,(test_and_set_bit(SWIE_LOCK,&(g_atm_dev.swie.lock)) == 0));
+	if (signal_pending(current)){
+		return -ERESTARTSYS; 
+	}
+
+	// Store cell in CBM memory
+	for(i=0;i<ATM_AAL0_SDU;i+=4){
+		AMAZON_WRITE_REGISTER_L(((u32*)cell)[i/4],SWIE_ICELL_ADDR+i);
+	}
+	//Store queue id
+	AMAZON_WRITE_REGISTER_L((u32) queue,SWIE_IQID_ADDR);
+
+	//Start SWIE
+	AMAZON_WRITE_REGISTER_L(SWIE_ICMD_START,SWIE_ICMD_ADDR);
+	
+	return 0;
+}
+
+#ifdef AMAZON_ATM_DEBUG
+/*
+ *	Brief: 		Interrupt handler for HTU
+ *
+ *	Parameters:	irq	- CPPN for this interrupt
+ *			data	- Device ID for this interrupt
+ *			regs	- Register file
+ *
+ */
+void amazon_atm_htu_isr(int irq, void *data, struct pt_regs *regs)
+{
+	u32	irq_stat=0;
+
+	// Read interrupt status register
+	irq_stat = readl(HTU_ISR0_ADDR);
+	AMAZON_TPE_DMSG("HTU status: %8x\n",irq_stat);
+	//Clear interrupt in CBM and ICU
+	AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_HTU_INT, HTU_SRC0_ADDR);
+	mask_and_ack_amazon_irq(AMAZON_HTU_INT);	
+	// Check if Any Cell Arrived
+	if (irq_stat & (HTU_ISR_NE | HTU_ISR_PNE) ) {
+		AMAZON_TPE_EMSG("INFNOENTRY %8x\n", readl(HTU_INFNOENTRY_ADDR));		
+	}else if (irq_stat & (HTU_ISR_TORD|HTU_ISR_PT)){
+		AMAZON_TPE_EMSG("Time Out %8x\n", readl(HTU_INFTIMEOUT_ADDR));
+	}else if (irq_stat & HTU_ISR_IT){
+		AMAZON_TPE_EMSG("Interrupt Test\n");
+	}else if (irq_stat & HTU_ISR_OTOC){
+		AMAZON_TPE_EMSG("Overflow of Time Out Counter\n");
+	}else if (irq_stat & HTU_ISR_ONEC){
+		AMAZON_TPE_EMSG("Overflow of No Entry Counter\n");
+	}else{
+		AMAZON_TPE_EMSG("unknown HTU interrupt occurs %8x\n", irq_stat);
+	}
+
+}
+#endif //AMAZON_ATM_DEBUG
+
+#ifdef AMAZON_TPE_TEST_AAL5_INT
+/*
+ *	Brief: 		Interrupt handler for AAL5
+ *
+ *	Parameters:	irq	- CPPN for this interrupt
+ *			data	- Device ID for this interrupt
+ *			regs	- Register file
+ *
+ */
+void amazon_atm_aal5_isr(int irq, void *data, struct pt_regs *regs)
+{
+	volatile u32 irq_stat=0;
+
+	// Read interrupt status register
+	irq_stat = readl(AAL5_SISR0_ADDR);
+	if (irq_stat){
+		AMAZON_TPE_EMSG("A5S status: %8x\n",irq_stat);
+		//Clear interrupt in CBM and ICU
+		AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_AAL5_INT, AAL5_SSRC0_ADDR);
+		mask_and_ack_amazon_irq(AMAZON_AAL5_INT);	
+	}
+	irq_stat = readl(AAL5_RISR0_ADDR);
+	if (irq_stat){
+		AMAZON_TPE_EMSG("A5R status: %8x\n",irq_stat);
+		//Clear interrupt in CBM and ICU
+		AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_AAL5_INT, AAL5_RSRC0_ADDR);
+		mask_and_ack_amazon_irq(AMAZON_AAL5_INT);	
+	}
+}
+#endif //AMAZON_TPE_TEST_AAL5_INT
+
+/*
+ *	Brief: 		Interrupt handler for CBM
+ *
+ *	Parameters:	irq	- CPPN for this interrupt
+ *			data	- Device ID for this interrupt
+ *			regs	- Register file
+ *
+ *	Description:
+ *	This is the MIPS interrupt handler for the CBM. It processes incoming cells
+ *	for SWIE queues.
+ */
+void amazon_atm_cbm_isr(int irq, void *data, struct pt_regs *regs)
+{
+	u32	irq_stat=0;
+	u8 qid=0;
+
+	// Read interrupt status register
+	while ( (irq_stat = readl(CBM_INTINF0_ADDR))){
+		AMAZON_TPE_DMSG("CBM INT status: %8x\n",irq_stat);
+		//Clear interrupt in CBM and ICU
+		AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_CBM_INT, CBM_SRC0_ADDR);
+		qid = (u8) ((irq_stat & CBM_INTINF0_QID_MASK)>>CBM_INTINF0_QID_SHIFT);
+#ifdef AMAZON_TPE_SCR	
+		if (irq_stat & CBM_INTINF0_EF){
+			amazon_atm_a5r((void*)qid);
+		}
+#endif
+		// Check if Any Cell Arrived
+		if (irq_stat & CBM_INTINF0_ACA) {
+			amazon_atm_swex((void *)irq_stat);		
+		}
+		//TX AAL5 PDU discard
+		if (irq_stat & CBM_INTINF0_OPF){
+ 			if ( (qid) < CBM_RX_OFFSET ){
+ 				g_atm_dev.mib_counter.tx_drop++;
+			}
+			queue_statics(qid, QS_HW_DROP);
+		}
+		if (irq_stat & (CBM_INTINF0_ERR|CBM_INTINF0_Q0E|CBM_INTINF0_Q0I|CBM_INTINF0_RDE)){
+			AMAZON_TPE_EMSG("CBM INT status: %8x\n",irq_stat);
+			if (irq_stat & CBM_INTINF0_ERR){
+				AMAZON_TPE_EMSG("CBM Error: FPI Bus Error\n");
+			}
+			if (irq_stat & CBM_INTINF0_Q0E){
+				AMAZON_TPE_EMSG("CBM Error: Queue 0 Extract\n");
+			}
+			if (irq_stat & CBM_INTINF0_Q0I){
+				AMAZON_TPE_EMSG("CBM Error: Queue 0 Extract\n");
+			}
+			if (irq_stat & CBM_INTINF0_RDE){
+				AMAZON_TPE_EMSG("CBM Error: Read Empty Queue %u\n",qid);
+				dump_qd(qid);
+			}
+		}		
+	}
+	mask_and_ack_amazon_irq(AMAZON_CBM_INT);
+}
+
+/*	Brief:	check the status word after AAL SDU after reassembly
+ */
+static inline void check_aal5_error(u8 stw0, u8 stw1, int qid)
+{
+	if (stw0 & AAL5_STW0_MFL){
+		AMAZON_TPE_DMSG("Maximum Frame Length\n");
+		g_atm_dev.queues[qid].aal5VccOverSizedSDUs++;
+	} 
+	if (stw0 & AAL5_STW0_CRC){
+		AMAZON_TPE_DMSG("CRC\n");
+		g_atm_dev.queues[qid].aal5VccCrcErrors++;
+	}
+#ifdef AMAZON_ATM_DEBUG_RX
+	AMAZON_TPE_EMSG("qid:%u stw0:%8x stw1:%8x\n",qid,stw0,stw1);
+#endif
+}
+
+/* Brief: 	Process DMA rx data
+ * Parameters:
+ 	dma_dev:	pointer to the dma_device_info, provided by us when register the dma device
+ * Return: 	no
+ * Description: DMA interrupt handerl with OoS support. It is called when there is some data in rx direction.
+ *
+ */
+//507261:tc.chen void atm_process_dma_rx(struct dma_device_info* dma_dev)
+void __system atm_process_dma_rx(struct dma_device_info* dma_dev)
+{
+        u8 * head=NULL;
+        u32 length=0;
+        u8 stw0=0;
+        u8 stw1=0;
+
+	struct sk_buff * skb=NULL;
+	struct atm_vcc * vcc=NULL;
+	int qid=0;
+#ifdef AMAZON_ATM_DEBUG_RX
+	static int dma_rx_dump=0;
+	static u32 seq=0;
+	
+	seq++;
+	if (dma_rx_dump>0){
+		printk("\n=========================[%u]=========================\n",seq);
+	}
+#endif	
+	length=dma_device_read(dma_dev,&head,(void**)&skb);
+	AMAZON_TPE_DMSG("receive %8p[%u] from DMA\n", head,length);
+	if (head == NULL||length<=0) {
+		AMAZON_TPE_DMSG("dma_read null \n");
+		goto error_exit;
+	}
+
+	if (length > (g_atm_dev.aal5.rx_max_sdu+64)){
+		AMAZON_TPE_EMSG("received packet too large (%u)\n",length);
+		goto error_exit;
+	}
+	//check AAL5R trail for error and qid
+	//last byte is qid
+	length--;
+	qid = (int) head[length];
+	AMAZON_TPE_DMSG("head[%u] qid %u\n",length, qid);
+	//STW0 is always 4 bytes before qid
+	length -= 4;
+	stw0 = head[length]&0xff;
+	AMAZON_TPE_DMSG("head[%u] stw0 %8x\n",length, stw0);
+	//position of STW1 depends on the BE bits
+	length = length-4 + (stw0&AAL5_STW0_BE);
+	stw1 = head[length]&0xff;
+	AMAZON_TPE_DMSG("head[%u] stw1 %8x\n",length, stw1);	
+	if ( (stw0 & AAL5_STW0_MASK) || (stw1 & AAL5_STW1_MASK) ){
+		//AAL5 Error
+		check_aal5_error(stw0, stw1,qid);		
+		goto error_exit;
+	}
+	//make data pointers consistent
+	//UU + CPI
+	length -= 2;
+	AMAZON_TPE_DMSG("packet length %u\n", length);
+
+	//error: cannot restore the qid
+	if (valid_qid(qid) != 1){
+		AMAZON_TPE_EMSG("received frame in invalid qid %u!\n", qid);
+		goto error_exit;
+	}
+	vcc = g_atm_dev.queues[qid].vcc;
+	if (vcc == NULL){
+		AMAZON_TPE_EMSG("received frame in invalid vcc, qid=%u!\n",qid);
+		goto error_exit;
+	}
+	if (skb == NULL){
+		AMAZON_TPE_EMSG("cannot restore skb pointer!\n");
+		goto error_exit;
+	}
+	skb_put(skb,length);
+	skb->stamp = xtime;
+	g_atm_dev.queues[qid].access_time=xtime;
+	if ((*g_atm_dev.queues[qid].push)(vcc,skb,0)){
+		g_atm_dev.mib_counter.rx_drop++;
+		queue_statics(qid, QS_SW_DROP);					
+	}else{
+		g_atm_dev.mib_counter.rx++;
+		adsl_led_flash();//joelin adsl led
+		queue_statics(qid, QS_PKT);
+		AMAZON_TPE_DMSG("push successful!\n");
+	}
+#ifdef AMAZON_ATM_DEBUG_RX
+	if (dma_rx_dump>0){
+		printk("\nOK packet [dump=%u] length=%u\n",dma_rx_dump,length);
+		dump_skb(length+7, head);
+	}
+	if (dma_rx_dump >0) dma_rx_dump--;
+#endif	
+	return ;
+error_exit:
+#ifdef AMAZON_ATM_DEBUG_RX
+	if ( (head!=NULL) && (length >0)){
+		AMAZON_TPE_EMSG("length=%u\n",length);
+		dump_skb(length+5, head);
+	}	
+	dma_rx_dump++;
+#endif	
+	g_atm_dev.mib_counter.rx_err++;
+	queue_statics(qid, QS_ERR);
+	/*
+	if (vcc){
+		(*g_atm_dev.queues[qid].push)(vcc,skb,1);	
+	}
+	*/
+	if (skb != NULL) {
+		dev_kfree_skb_any(skb);
+	}
+	return;
+}
+
+/*Brief:	ISR for DMA pseudo interrupt
+ *Parameter:
+ 	dma_dev:	pointer to the dma_device_info, provided by us when register the dma device
+ 	intr_status:	
+ 		RCV_INT:		rx data available
+ 		TX_BUF_FULL_INT:	tx descriptor run out of
+ 		TRANSMIT_CPT_INT:	tx descriptor available again
+ *Return:
+ 	0 for success???
+ */
+//507261:tc.chen int amazon_atm_dma_handler(struct dma_device_info* dma_dev, int intr_status)
+int __system amazon_atm_dma_handler(struct dma_device_info* dma_dev, int intr_status)
+{
+	AMAZON_TPE_DMSG("status:%u\n",intr_status);
+	switch (intr_status) {
+		case RCV_INT:
+			atm_process_dma_rx(dma_dev);
+			break;
+		case TX_BUF_FULL_INT:
+			//TX full: no descriptors
+			atm_dma_full();
+			break;
+		case TRANSMIT_CPT_INT:
+			//TX free: at least one descriptor
+			atm_dma_free();
+			break;
+		default:
+			AMAZON_TPE_EMSG("unknown status!\n");
+	}
+	return 0;
+}
+
+/*Brief:	free buffer for DMA tx
+ *Parameter:
+ 	dataptr:	pointers to data buffer
+ 	opt:		optional parameter, used to convey struct skb pointer, passwd in dma_device_write
+ *Return:
+ 	0 for success???
+ *Description:
+ 	called by DMA module to release data buffer after DMA tx transaction
+ *Error:
+ 	cannot restore skb pointer
+ */
+int amazon_atm_free_tx(u8*dataptr, void* opt)
+{
+	struct sk_buff *skb;
+	if (opt){
+		AMAZON_TPE_DMSG("free skb%8p\n",opt);
+		skb = (struct sk_buff *)opt;
+		amazon_atm_free_tx_skb(skb);
+	}else{
+		AMAZON_TPE_EMSG("BUG: cannot restore skb pointer!\n");
+	}
+	return 0;
+}
+
+/*Brief:	allocate buffer & do alignment
+ */
+inline struct sk_buff * amazon_atm_alloc_buffer(int len)
+{
+	struct sk_buff *skb;
+	skb = dev_alloc_skb(len+16);
+	if (skb){
+		//alignment requriements (4x32 bits (16 bytes) boundary)
+		alloc_align_16(skb);
+	}
+	return skb;
+}
+
+/*Brief:	allocate buffer for DMA rx
+ *Parameter:
+ 	len: length
+ 	opt: optional data to convey the skb pointer, which will be returned to me in interrupt handler,
+ *Return:
+ 	pointer to buffer, NULL means error?
+ *Description:
+ 	must make sure byte alignment
+ */
+ 	
+u8* amazon_atm_alloc_rx(int len, int* offset, void **opt)
+{
+	struct sk_buff *skb;
+	*offset = 0;
+	skb = amazon_atm_alloc_buffer(len);
+	if (skb){
+		AMAZON_TPE_DMSG("alloc skb->data:%8p len:%u\n",skb->data,len);
+		*(struct sk_buff**)opt = skb;
+	}else{
+		AMAZON_TPE_DMSG("no memory for receiving atm frame!\n");
+		return NULL;
+	}
+	return skb->data;
+}
+
+
+
+
+/* Brief:	Allocate kernel memory for sending a datagram.
+ * Parameters
+ *	vcc	virtual connection
+ *	size	data buffer size
+ * Return:
+ *	NULL	fail
+ *	sk_buff	a pointer to a sk_buff
+ * Description:
+ *  This function can allocate our own additional memory for AAL5S inbound
+ * header (8bytes). We have to replace the protocol default one (alloc_tx in /net/atm/common.c) 
+ * when we open the device.
+ * byte alignment is done is DMA driver.
+ */
+struct sk_buff *amazon_atm_alloc_tx(struct atm_vcc *vcc,unsigned int size)
+{
+	struct sk_buff *skb;
+
+	if (!dma_may_send(DMA_TX_CH0)){
+		AMAZON_TPE_EMSG("no DMA descriptor available!\n");
+		return NULL;
+	}
+	//AAL5 inbound header space + alignment extra buffer
+	size+=8+AAL5S_INBOUND_HEADER;
+
+        if (atomic_read(&vcc->tx_inuse) && !atm_may_send(vcc,size)) {
+                AMAZON_TPE_EMSG("Sorry tx_inuse = %u, size = %u, sndbuf = %u\n",
+                    atomic_read(&vcc->tx_inuse),size,vcc->sk->sndbuf);
+                return NULL;
+        }
+
+        skb = amazon_atm_alloc_buffer(size);
+	if (skb == NULL){
+		AMAZON_TPE_EMSG("no memory\n");
+		return NULL;
+	}
+	AMAZON_TPE_DMSG("dev_alloc_skb(%u) = %x\n", skb->len, (u32)skb);
+        AMAZON_TPE_DMSG("tx_inuse %u += %u\n",atomic_read(&vcc->tx_inuse),skb->truesize);
+        atomic_add(skb->truesize+ATM_PDU_OVHD,&vcc->tx_inuse);
+
+	//reserve for AAL5 inbound header
+	skb_reserve(skb,AAL5S_INBOUND_HEADER);
+        return skb;
+}
+
+
+/* Brief:	change per queue QSB setting according to vcc qos parameters
+ * Paramters:
+ *	vcc:	atm_vcc pointer 
+ *	qid:	CBM queue id (1~15)
+ * Return:
+  */
+static inline void set_qsb(struct atm_vcc *vcc, struct atm_qos *qos, int qid)
+{
+	qsb_qptl_t	qptl;
+	qsb_qvpt_t	qvpt;
+	u32 tmp=0;
+	unsigned int qsb_clk;
+	
+	qsb_clk = amazon_get_fpi_hz()>>1;
+        
+	AMAZON_TPE_EMSG("Class=%u MAX_PCR=%u PCR=%u MIN_PCR=%u SCR=%u MBS=%u CDV=%u\n"
+		,qos->txtp.traffic_class
+		,qos->txtp.max_pcr
+		,qos->txtp.pcr
+		,qos->txtp.min_pcr
+		,qos->txtp.scr
+		,qos->txtp.mbs
+		,qos->txtp.cdv
+		);
+	
+	// PCR limiter
+	if (qos->txtp.max_pcr == 0){	
+		qptl.bit.tprs = 0;                  /* 0 disables the PCR limiter */
+	}else {
+		// peak cell rate will be slightly lower than requested	(maximum rate / pcr)= (qsbclock/2^3 * timestep/4)/pcr
+		tmp = (( (qsb_clk * g_atm_dev.qsb.tstepc)>>5)/ qos->txtp.max_pcr ) + 1;
+		// check if an overfow occured
+		if (tmp > QSB_TP_TS_MAX) {
+			AMAZON_TPE_EMSG("max_pcr is too small, max_pcr:%u tprs:%u\n",qos->txtp.max_pcr, tmp);
+		  	qptl.bit.tprs = QSB_TP_TS_MAX;
+		}else{
+			qptl.bit.tprs = tmp;
+		}
+	}
+	//WFQ
+	if (qos->txtp.traffic_class == ATM_CBR  || qos->txtp.traffic_class ==ATM_VBR_RT){
+		// real time queue gets weighted fair queueing bypass
+		qptl.bit.twfq  = 0;
+	}else if (qos->txtp.traffic_class ==ATM_VBR_NRT ||qos->txtp.traffic_class ==ATM_UBR_PLUS ){
+		// wfq calculation here are based on virtual cell rates, to reduce granularity for large rates
+		// wfq factor is maximum cell rate / garenteed cell rate.
+		//qptl.bit.twfq = g_atm_dev.qsb.min_cr * QSB_WFQ_NONUBR_MAX / qos->txtp.min_pcr;
+		if (qos->txtp.min_pcr == 0) {
+			AMAZON_TPE_EMSG("<warning> MIN_PCR should not be zero\n");
+			qptl.bit.twfq = QSB_WFQ_NONUBR_MAX;
+		}else{
+			tmp = QSB_GCR_MIN * QSB_WFQ_NONUBR_MAX / qos->txtp.min_pcr;		
+			if (tmp == 0 ){
+				qptl.bit.twfq = 1;
+			}else if (tmp > QSB_WFQ_NONUBR_MAX){
+				AMAZON_TPE_EMSG("min_pcr is too small, min_pcr:%u twfq:%u\n",qos->txtp.min_pcr, tmp);
+				qptl.bit.twfq = QSB_WFQ_NONUBR_MAX;
+			}else{
+				qptl.bit.twfq = tmp;	
+			}
+		}
+	}else if (qos->txtp.traffic_class == ATM_UBR){
+		// ubr bypass, twfq set to maximum value
+		qptl.bit.twfq = QSB_WFQ_UBR_BYPASS;
+	}else{
+		//tx is diabled, treated as UBR
+		AMAZON_TPE_EMSG("<warning> unsupported traffic class %u \n", qos->txtp.traffic_class);
+		qos->txtp.traffic_class = ATM_UBR;
+		qptl.bit.twfq = QSB_WFQ_UBR_BYPASS;
+	}
+	
+	//SCR Leaky Bucket Shaper VBR.0/VBR.1
+	if (qos->txtp.traffic_class ==ATM_VBR_RT || qos->txtp.traffic_class ==ATM_VBR_NRT){
+		if (qos->txtp.scr == 0){
+			//SCR == 0 disable the shaper
+			qvpt.bit.ts = 0;
+			qvpt.bit.taus = 0;
+		}else{
+			//CLP
+			if (vcc->atm_options&ATM_ATMOPT_CLP){
+				//CLP1
+				qptl.bit.vbr = 1;
+			}else{
+				//CLP0
+				qptl.bit.vbr = 0;
+			}
+			//TS and TauS
+			tmp = (( (qsb_clk * g_atm_dev.qsb.tstepc)>>5)/ qos->txtp.scr ) + 1;
+			if (tmp > QSB_TP_TS_MAX) {
+				AMAZON_TPE_EMSG("scr is too small, scr:%u ts:%u\n",qos->txtp.scr, tmp);
+				qvpt.bit.ts = QSB_TP_TS_MAX;
+			}else{
+				qvpt.bit.ts = tmp;
+			}
+			tmp = (qos->txtp.mbs - 1)*(qvpt.bit.ts - qptl.bit.tprs)/64;
+			if (tmp > QSB_TAUS_MAX){
+				AMAZON_TPE_EMSG("mbs is too large, mbr:%u taus:%u\n",qos->txtp.mbs, tmp);
+				qvpt.bit.taus = QSB_TAUS_MAX;
+			}else if (tmp == 0){
+				qvpt.bit.taus = 1;
+			}else{
+				qvpt.bit.taus = tmp;
+			}
+		}
+	}else{
+		qvpt.w0 = 0;
+	}
+	//write the QSB Queue Parameter Table (QPT)
+	AMAZON_WRITE_REGISTER_L(QSB_QPT_SET_MASK,QSB_RTM_ADDR);
+	AMAZON_WRITE_REGISTER_L(qptl.w0, QSB_RTD_ADDR);
+	AMAZON_WRITE_REGISTER_L((QSB_TABLESEL_QPT<<QSB_TABLESEL_SHIFT)
+		| QSB_RAMAC_REG_LOW
+		| QSB_WRITE
+		| qid
+		,QSB_RAMAC_ADDR);
+	//write the QSB Queue VBR Parameter Table (QVPT)
+	AMAZON_WRITE_REGISTER_L(QSB_QVPT_SET_MASK,QSB_RTM_ADDR);
+	AMAZON_WRITE_REGISTER_L(qvpt.w0, QSB_RTD_ADDR);
+	AMAZON_WRITE_REGISTER_L((QSB_TABLESEL_QVPT<<QSB_TABLESEL_SHIFT)
+		| QSB_RAMAC_REG_LOW
+		| QSB_WRITE
+		| qid
+		,QSB_RAMAC_ADDR);	
+	AMAZON_TPE_EMSG("tprs:%u twfq:%u ts:%u taus:%u\n",qptl.bit.tprs,qptl.bit.twfq,qvpt.bit.ts,qvpt.bit.taus);
+}
+
+/* 
+ * Brief:	create/change CBM queue descriptor
+ * Parameter:	
+ *	vcc:	atm_vcc pointer 
+ *	qid:	CBM queue id (1~15)
+ */
+static inline void set_qd(struct atm_vcc *vcc, u32 qid)
+{
+	u32 tx_config=0,rx_config=0;
+	u32 itf = (u32) vcc->itf;
+	u32 dma_qos=0;
+	u8 * qd_addr=NULL;
+		
+	tx_config|=CBM_QD_W3_WM_EN|CBM_QD_W3_CLPt;
+	//RT: check if the connection is a real time connection
+	if (vcc->qos.txtp.traffic_class == ATM_CBR || vcc->qos.txtp.traffic_class == ATM_VBR_RT){
+		tx_config|= CBM_QD_W3_RT;
+	}else{
+		tx_config|= CBM_QD_W3_AAL5; //don't set the AAL5 flag if it is a RT service
+	}
+	rx_config = tx_config;
+	
+	if(vcc->qos.aal == ATM_AAL5){	
+		//QoS: DMA QoS according to the traffic class
+		switch (vcc->qos.txtp.traffic_class){
+			case ATM_CBR: dma_qos = CBR_DMA_QOS;break;
+			case ATM_VBR_RT: dma_qos = VBR_RT_DMA_QOS;break;
+			case ATM_VBR_NRT: dma_qos = VBR_NRT_DMA_QOS;break;
+			case ATM_UBR_PLUS: dma_qos = UBR_PLUS_DMA_QOS;break;
+			case ATM_UBR: dma_qos = UBR_DMA_QOS;break;
+		}
+	
+		//TX: upstream, AAL5(EPD or PPD), NOINT, SBid
+		tx_config |= CBM_QD_W3_DIR_UP|CBM_QD_W3_INT_NOINT|(itf&CBM_QD_W3_SBID_MASK);
+		//RX: DMA QoS, downstream, no interrupt, AAL5(EPD, PPD), NO INT, HCR
+#ifdef AMAZON_TPE_SCR
+		rx_config |= dma_qos|CBM_QD_W3_DIR_DOWN|CBM_QD_W3_INT_EOF;
+#else		
+		rx_config |= dma_qos|CBM_QD_W3_DIR_DOWN|CBM_QD_W3_INT_NOINT|CBM_QD_W3_HCR;
+#endif		
+	}else {
+		//should be AAL0	
+		//upstream, NOINT, SBid
+		tx_config |= CBM_QD_W3_DIR_UP|CBM_QD_W3_INT_NOINT|(itf&CBM_QD_W3_SBID_MASK);
+		//RX: downstream, ACA interrupt, 
+		rx_config |= CBM_QD_W3_DIR_DOWN|CBM_QD_W3_INT_ACA;
+	}
+
+	//Threshold: maximum threshold for tx/rx queue, which is adjustable in steps of 64 cells
+	tx_config |=	( (divide_by_64_round_up(tx_q_threshold)&0xffff)<<CBM_QD_W3_THRESHOLD_SHIFT) & CBM_QD_W3_THRESHOLD_MASK;
+	rx_config |=	( (divide_by_64_round_up(rx_q_threshold)&0xffff)<<CBM_QD_W3_THRESHOLD_SHIFT) & CBM_QD_W3_THRESHOLD_MASK;
+	
+	qd_addr = (u8*) KSEG1ADDR((unsigned long)g_atm_dev.cbm.qd_addr);
+	//TX
+	AMAZON_WRITE_REGISTER_L(tx_config, (qd_addr+qid*CBM_QD_SIZE + 0xc));
+	AMAZON_WRITE_REGISTER_L(0, (qd_addr+qid*CBM_QD_SIZE + 0x8));
+	//RX
+	AMAZON_WRITE_REGISTER_L(rx_config, (qd_addr+(qid+CBM_RX_OFFSET)*CBM_QD_SIZE + 0xc));
+	AMAZON_WRITE_REGISTER_L(0, (qd_addr+(qid+CBM_RX_OFFSET)*CBM_QD_SIZE + 0x8));
+}
+/*
+ * Brief:	add HTU table entry
+ * Parameter:	
+ *	vpi.vci:
+ *	qid:	CBM queue id (DEST is qid + CBM_RX_OFFSET)
+ *	idx:	entry id (starting from zero to 14)
+ * Return:
+ *	0:	sucessful
+ *	EIO:	HTU table entry cannot be written
+ */
+
+inline int set_htu_entry(u8 vpi, u16 vci, u8 qid, u8 idx)
+{
+	int i = 0;
+	u32 tmp1=0;
+	while ((tmp1 = readl(HTU_RAMSTAT_ADDR))!=0 && i < 1024) i++;
+	if (i > 1024)
+	{
+		AMAZON_TPE_EMSG("timeout\n");
+		return -EIO;
+	}
+	// write address register,
+	AMAZON_WRITE_REGISTER_L(idx, HTU_RAMADDR_ADDR);
+	// configure transmit queue
+	tmp1 = vpi<<24|vci<<8;
+	tmp1|= 	HTU_RAMDAT1_VCON	// valid connection the entry is not validated here !!!!!!!!!!!!!!!!
+		|HTU_RAMDAT1_VCI3	// vci3 -> oam queue
+		|HTU_RAMDAT1_VCI4	// vci4 -> oam queue
+		|HTU_RAMDAT1_VCI6	// vci6 -> rm queue
+		|HTU_RAMDAT1_PTI4	// pti4 -> oam queue
+		|HTU_RAMDAT1_PTI5;	// pti5 -> oam queue
+
+	// ramdat 1 (in params & oam handling)
+	AMAZON_WRITE_REGISTER_L( tmp1, HTU_RAMDAT1_ADDR);
+	// ramdat 2 (out params & oam handling)
+	tmp1 = ((qid+CBM_RX_OFFSET)&HTU_RAMDAT2_QID_MASK)
+		|HTU_RAMDAT2_PTI6
+		|HTU_RAMDAT2_PTI7
+		|HTU_RAMDAT2_F4U
+		|HTU_RAMDAT2_F5U
+		;
+	AMAZON_WRITE_REGISTER_L( tmp1, HTU_RAMDAT2_ADDR);
+	wmb();
+	// write HTU entry
+	AMAZON_WRITE_REGISTER_L(HTU_RAMCMD_WR, HTU_RAMCMD_ADDR);
+	return 0;
+}
+/*
+ * Brief:	add HTU table entry
+ * Parameter:	
+ *	vcc:	atm_vcc pointer
+ *	qid:	CBM queue id
+ * Return:
+ *	0:	sucessful
+ *	EIO:	HTU table entry cannot be written
+ */
+inline static int set_htu(struct atm_vcc *vcc, u32 qid)
+{
+	return set_htu_entry(vcc->vpi, vcc->vci, qid, (qid - CBM_DEFAULT_Q_OFFSET));
+}
+
+/* 
+ * Brief:	allocate a queue
+ * Return:	
+ *		<=0	no available queues
+ *		>0	qid
+ */
+static int atm_allocate_q(short itf)
+{
+	int i;
+	u32 tmp1=0;
+	int qid=0;
+	amazon_atm_port_t * dev;
+	dev = &g_atm_dev.ports[itf];
+	//find start queue id for this interface
+	for (i=0; i< itf; i++)
+	{
+		qid+= g_atm_dev.ports[i].max_conn;
+	}
+	// apply default queue offset ( oam, free cell queue, others, rm )
+	qid += CBM_DEFAULT_Q_OFFSET;
+	tmp1 = qid;
+	// search for a free queue
+	while (	(qid<tmp1+dev->max_conn)
+		&& ( g_atm_dev.queues[qid].free != 1)) {
+		qid++;;
+	}
+	// if none was found, send failure message and return
+	if ( tmp1+dev->max_conn == qid)
+	{
+		return -EFAULT;
+	}
+	return qid;
+	
+}
+/* Brief:	open a aal5 or aal0 connection
+ */
+static int atm_open(struct atm_vcc *vcc, push_back_t push)
+{
+	int err=0;
+	int qid=0;
+	amazon_atm_port_t * port = & g_atm_dev.ports[vcc->itf];
+	unsigned long flags;
+	/***************** check bandwidth ******************/
+	/* 511045:linmars change ATM_VBR_NRT to use scr instead of pcr */
+	if ((vcc->qos.txtp.traffic_class==ATM_CBR&&vcc->qos.txtp.max_pcr>port->tx_rem_cr)
+	||(vcc->qos.txtp.traffic_class==ATM_VBR_RT&&vcc->qos.txtp.max_pcr>port->tx_rem_cr)
+	||(vcc->qos.txtp.traffic_class==ATM_VBR_NRT&&vcc->qos.txtp.scr>port->tx_rem_cr) 
+	||(vcc->qos.txtp.traffic_class==ATM_UBR_PLUS&&vcc->qos.txtp.min_pcr>port->tx_rem_cr)
+	) {
+                AMAZON_TPE_EMSG("not enough bandwidth left (%u) cells per seconds \n",port->tx_rem_cr);
+                return -EINVAL;
+	}
+	if ( (qid = amazon_atm_find_vpivci(vcc->vpi, vcc->vci)) >0 ){
+		AMAZON_TPE_EMSG("vpi:%u vci:%u is alreay open on queue:%u\n", vcc->vpi, vcc->vci, qid);
+		return -EADDRINUSE;
+	}
+
+	/***************** allocate entry queueID for this port *****************/
+	if ( (qid=atm_allocate_q(vcc->itf)) <= 0){
+		AMAZON_TPE_EMSG("port: %u max:%u qid: %u\n", vcc->itf, port->max_conn, qid);
+		AMAZON_TPE_EMSG("no availabel connections for this port:%u\n",vcc->itf);
+		return -EINVAL;
+	}
+	/**************QSB parameters and CBM descriptors*************/
+	set_qsb(vcc, &vcc->qos, qid);
+	set_qd(vcc, qid);
+	mb();
+	err=set_htu(vcc,qid);
+	if (err){
+		AMAZON_TPE_EMSG("set htu entry fails %u\n",err);
+		return err;
+	}
+	/************set internal mapping*************/
+	local_irq_save(flags);
+	g_atm_dev.queues[qid].free = 0;
+	g_atm_dev.queues[qid].vcc = vcc;
+	g_atm_dev.queues[qid].push = push;
+	g_atm_dev.queues[qid+CBM_RX_OFFSET].free = 0;
+	g_atm_dev.queues[qid+CBM_RX_OFFSET].vcc = vcc;
+	g_atm_dev.queues[qid+CBM_RX_OFFSET].push = push;
+	/******************reserve bandwidth**********************/
+	if (vcc->qos.txtp.traffic_class == ATM_CBR){
+		//CBR, real time connection, reserve PCR
+		port->tx_cur_cr += vcc->qos.txtp.max_pcr;
+		port->tx_rem_cr -= vcc->qos.txtp.max_pcr;
+	}else if (vcc->qos.txtp.traffic_class == ATM_VBR_RT){
+		//VBR_RT, real time connection, reserve PCR
+		port->tx_cur_cr += vcc->qos.txtp.max_pcr;
+		port->tx_rem_cr -= vcc->qos.txtp.max_pcr;
+	}else if (vcc->qos.txtp.traffic_class == ATM_VBR_NRT){
+		//VBR_NRT, reserve SCR
+		port->tx_cur_cr += vcc->qos.txtp.pcr;
+		port->tx_rem_cr -= vcc->qos.txtp.pcr;
+	}else if (vcc->qos.txtp.traffic_class == ATM_UBR_PLUS){
+		//UBR_PLUS, reserve MCR
+		port->tx_cur_cr += vcc->qos.txtp.min_pcr;
+		port->tx_rem_cr -= vcc->qos.txtp.min_pcr;
+	}
+	local_irq_restore(flags);
+	return err;
+}
+/* Brief: 	Open ATM connection
+ * Parameters: 	atm_vcc	- Pointer to VCC data structure
+ *		vpi	- VPI value for new connection
+ *		vci	- VCI value for new connection
+ *
+ * Return: 	0 	- sucessful
+ * 		-ENOMEM	- No memory available
+ *		-EINVAL	- No bandwidth/queue/ or unsupported AAL type
+ * Description:
+ *	This function opens an ATM connection on a specific device/interface
+ *
+ */
+int	amazon_atm_open(struct atm_vcc *vcc,push_back_t push)
+{
+	int err=0;
+
+	AMAZON_TPE_DMSG("vpi %u vci %u  itf %u aal %u\n"
+		,vcc->vpi
+		,vcc->vci
+		,vcc->itf
+		,vcc->qos.aal
+		);
+		
+	AMAZON_TPE_DMSG("tx cl %u bw %u mtu %u\n"
+		,vcc->qos.txtp.traffic_class
+		,vcc->qos.txtp.max_pcr
+		,vcc->qos.txtp.max_sdu
+		);
+	AMAZON_TPE_DMSG("rx cl %u bw %u mtu %u\n"
+		,vcc->qos.rxtp.traffic_class
+		,vcc->qos.rxtp.max_pcr
+		,vcc->qos.rxtp.max_sdu
+		);
+	if (vcc->qos.aal == ATM_AAL5 || vcc->qos.aal == ATM_AAL0){
+		err = atm_open(vcc,push);
+	}else{
+		AMAZON_TPE_EMSG("unsupported aal type %u\n", vcc->qos.aal);
+		err = -EPROTONOSUPPORT;
+	};
+	if (err == 0 ){
+		//replace the default memory allocation function with our own
+		vcc->alloc_tx = amazon_atm_alloc_tx;
+		set_bit(ATM_VF_READY,&vcc->flags);
+	}
+	return err;
+}
+
+/* Brief: 	Send ATM OAM cell
+ * Parameters: 	atm_vcc	- Pointer to VCC data structure
+ *		skb	- Pointer to sk_buff structure, that contains the data
+ * Return: 	0 		- sucessful
+ * 		-ENOMEM		- No memory available
+ *		-EINVAL		- Not supported
+ * Description:
+ * This function sends a cell over and ATM connection
+ * We always release the skb
+ * TODO: flags handling (ATM_OF_IMMED, ATM_OF_INRATE)
+ */
+int	amazon_atm_send_oam(struct atm_vcc *vcc, void * cell, int flags)
+{
+	int err=0;
+	int qid=0;
+	struct amazon_atm_cell_header * cell_header;
+	// Get cell header
+	cell_header = (struct amazon_atm_cell_header*) cell;
+	if ((cell_header->bit.pti == ATM_PTI_SEGF5) || (cell_header->bit.pti == ATM_PTI_E2EF5)) {
+		qid = amazon_atm_find_vpivci( cell_header->bit.vpi, cell_header->bit.vci);
+	}else if (cell_header->bit.vci == 0x3 || cell_header->bit.vci == 0x4) {
+		//507281:tc.chen qid = amazon_atm_find_vpi((int) cell_header->bit.vpi);
+		// 507281:tc.chen start
+		u8 f4_vpi;
+		f4_vpi = cell_header->bit.vpi;
+		qid = amazon_atm_find_vpi(f4_vpi );
+		// 507281:tc.chen end
+	}else{
+		//non-OAM cells, always invalid
+		qid = -EINVAL;
+	}
+	if (qid == -EINVAL) {
+		err =  -EINVAL;
+		AMAZON_TPE_EMSG("not valid AAL0 packet\n");
+	}else{
+		//send the cell using swie
+#ifdef TPE_LOOPBACK
+		err = amazon_atm_swin(AMAZON_ATM_OAM_Q_ID, cell);
+#else		
+		err = amazon_atm_swin(qid, cell);
+#endif
+	}
+	//kfree(cell);
+	return err;
+}
+
+/* Brief: 	Send AAL5 frame through DMA
+ * Parameters: 	vpi	- virtual path id 
+ *		vci	- virtual circuit id
+ *		clp	- cell loss priority
+ *		qid	- CBM queue to be sent to
+ *		skb	- packet to be sent
+ * Return: 	0 		- sucessful
+ * 		-ENOMEM		- No memory available
+ *		-EINVAL		- Not supported
+ * Description:
+ * This function sends a AAL5 frame over and ATM connection
+ * 	1. make sure that the data is aligned to 4x32-bit boundary
+ *	2. provide the inbound data (CPCS-UU and CPI, not used here)
+ *	3. set CLPn
+ *	4. send the frame by DMA
+ *	5. release the buffer ???
+ ** use our own allocation alloc_tx
+ ** we make sure the alignment and additional memory
+ *** we always release the skb
+
+ */
+int amazon_atm_dma_tx(u8 vpi, u16 vci, u8 clp, u8 qid, struct sk_buff *skb) 
+{
+     	int err=0,need_pop=1;
+	u32 * data=NULL;
+	int nwrite=0;
+	struct sk_buff *skb_tmp;
+	u32 len=skb->len;	
+
+	//AAL5S inbound header 8 bytes
+	if (skb->len > g_atm_dev.aal5.tx_max_sdu - AAL5S_INBOUND_HEADER) {
+		AMAZON_TPE_DMSG("tx_max_sdu:%u\n",g_atm_dev.aal5.tx_max_sdu); 
+		AMAZON_TPE_DMSG("skb too large [%u]!\n",skb->len);
+		err = -EMSGSIZE;
+		goto atm_dma_tx_error_exit;
+	}
+	
+	//Check the byte alignment requirement and header space
+	if ( ( ((u32)(skb->data)%16) !=AAL5S_INBOUND_HEADER)|| (skb_headroom(skb)<AAL5S_INBOUND_HEADER)){
+		//not aligned or no space for header, fall back to memcpy
+		skb_tmp = dev_alloc_skb(skb->len+16);
+		if (skb_tmp==NULL){
+			err = - ENOMEM;			
+			goto atm_dma_tx_error_exit;	
+		}
+		alloc_align_16(skb_tmp);
+		g_atm_dev.aal5.cnt_cpy++;
+		skb_reserve(skb_tmp,AAL5S_INBOUND_HEADER);
+		memcpy(skb_put(skb_tmp,skb->len), skb->data, skb->len);
+		amazon_atm_free_tx_skb(skb);
+		need_pop=0;
+		skb = skb_tmp;
+	}
+	//Provide AAL5S inbound header
+	data = (u32 *)skb_push(skb,8);
+	data[0] = __be32_to_cpu(vpi<<20|vci<<4|clp);
+	data[1] = __be32_to_cpu(g_atm_dev.aal5.padding_byte<<8|qid);
+	
+	len = skb->len;
+
+	//send through DMA
+	AMAZON_TPE_DMSG("AAL5S header 0 %8x\n", data[0]);
+	AMAZON_TPE_DMSG("AAL5S header 0 %8x\n", data[1]);
+	AMAZON_TPE_DMSG("about to call dma_write len: %u\n", len);
+	nwrite=dma_device_write( &g_dma_dev,skb->data,len,skb);
+	if (nwrite != len) {
+		//DMA descriptors full
+//		AMAZON_TPE_EMSG("AAL5 packet drop due to DMA nwrite:%u skb->len:%u\n", nwrite,len);
+		AMAZON_TPE_DMSG("AAL5 packet drop due to DMA nwrite:%u skb->len:%u\n", nwrite,len);
+		err = -EAGAIN;
+		goto atm_dma_tx_drop_exit;
+	}
+	AMAZON_TPE_DMSG("just finish call dma_write\n");
+	//release in the "dma done" call-back
+	return 0;
+atm_dma_tx_error_exit:
+	g_atm_dev.mib_counter.tx_err++;	
+	queue_statics(qid, QS_ERR);
+	goto atm_dma_tx_exit;
+	
+atm_dma_tx_drop_exit:
+	g_atm_dev.mib_counter.tx_drop++;
+	queue_statics(qid, QS_SW_DROP);
+atm_dma_tx_exit:
+	if (need_pop){
+		amazon_atm_free_tx_skb(skb);
+	}else{
+		dev_kfree_skb_any(skb);
+	}
+	return err;
+}
+
+/* Brief: 	Send AAL0/AAL5 packet
+ * Parameters: 	atm_vcc	- Pointer to VCC data structure
+ *		skb	- Pointer to sk_buff structure, that contains the data
+ * Return: 	0 		- sucessful
+ * 		-ENOMEM		- No memory available
+ *		-EINVAL		- Not supported
+ * Description:
+ *	See amazon_atm_dma_tx
+ */
+int	amazon_atm_send(struct atm_vcc *vcc,struct sk_buff *skb)
+{
+	int qid=0;
+	u8 clp=0;
+        int err=0;
+	u32 wm=0;
+
+	if (vcc == NULL || skb == NULL){
+		AMAZON_TPE_EMSG("invalid parameter\n");
+		return -EINVAL;
+	}
+	ATM_SKB(skb)->vcc = vcc;
+	qid = amazon_atm_get_queue(vcc);
+	if (valid_qid(qid) != 1) {
+		AMAZON_TPE_EMSG("invalid vcc!\n");
+		err = -EINVAL;
+		goto atm_send_err_exit;
+	}
+	
+	//Send AAL0 using SWIN
+	if (vcc->qos.aal == ATM_AAL0){
+#ifdef  TPE_LOOPBACK
+		err=amazon_atm_swin((qid+CBM_RX_OFFSET), skb->data);	
+#else
+		err=amazon_atm_swin(qid, skb->data);
+#endif
+		if (err){
+			goto atm_send_err_exit;
+		}	
+		goto atm_send_exit;
+	}
+	
+	//Should be AAl5
+	//MIB counter
+	g_atm_dev.mib_counter.tx++;
+	adsl_led_flash();//joelin adsl led
+	queue_statics(qid, QS_PKT);
+
+#ifdef AMAZON_CHECK_LINK
+	//check adsl link 
+	if (adsl_link_status == 0){
+		//link down
+		AMAZON_TPE_DMSG("ADSL link down, discarded!\n");
+		err=-EFAULT;
+		goto atm_send_drop_exit;
+	}
+#endif
+	clp = (vcc->atm_options&ATM_ATMOPT_CLP)?1:0;
+	//check watermark first
+	wm = readl(CBM_WMSTAT0_ADDR);
+	if (  (wm & (1<<qid))
+	    ||( (vcc->qos.txtp.traffic_class != ATM_CBR
+	         &&vcc->qos.txtp.traffic_class != ATM_VBR_RT) 
+		&(wm & (CBM_WM_NRT_MASK | (clp&CBM_WM_CLP1_MASK)) ))){
+		//wm hit: discard
+		AMAZON_TPE_DMSG("watermark hit, discarded!\n");
+		err=-EFAULT;
+		goto atm_send_drop_exit;
+	}
+#ifdef  TPE_LOOPBACK
+	return amazon_atm_dma_tx(vcc->vpi, vcc->vci,clp, (qid+CBM_RX_OFFSET),skb);
+#else	
+	return amazon_atm_dma_tx(vcc->vpi, vcc->vci,clp, qid,skb);
+#endif
+
+atm_send_exit:	
+	amazon_atm_free_tx_skb_vcc(vcc,skb);	
+	return 0;
+	
+atm_send_drop_exit:
+	g_atm_dev.mib_counter.tx_drop++;
+	queue_statics(qid,QS_SW_DROP);
+atm_send_err_exit:	
+	amazon_atm_free_tx_skb_vcc(vcc,skb);
+	return err;
+}
+
+/* Brief:	Return ATM port related MIB
+ * Parameter:	interface number
+ 	 atm_cell_ifEntry_t
+ */
+int amazon_atm_cell_mib(atm_cell_ifEntry_t* to,u32 itf)
+{
+	g_atm_dev.mib_counter.htu_unp += readl(HTU_MIBCIUP);
+	to->ifInUnknownProtos = g_atm_dev.mib_counter.htu_unp;
+#ifdef AMAZON_TPE_READ_ARC
+	u32 reg_val=0;
+	meiDebugRead((AR_CELL0_ADDR+itf*4),&reg_val,1);
+	g_atm_dev.mib_counter.rx_cells += reg_val;
+	reg_val=0;
+	meiDebugWrite((AR_CELL0_ADDR+itf*4),&reg_val,1);
+	to->ifHCInOctets_h = (g_atm_dev.mib_counter.rx_cells * 53)>>32;
+	to->ifHCInOctets_l = (g_atm_dev.mib_counter.rx_cells * 53) & 0xffff;
+	
+	meiDebugRead((AT_CELL0_ADDR+itf*4),&reg_val,1);
+	g_atm_dev.mib_counter.tx_cells += reg_val;
+	reg_val=0;
+	meiDebugWrite((AT_CELL0_ADDR+itf*4),&reg_val,1);
+	to->ifHCOutOctets_h = (g_atm_dev.mib_counter.tx_cells * 53)>>32;
+	to->ifHCOutOctets_l = (g_atm_dev.mib_counter.rx_cells * 53) & 0xffff;
+	
+	meiDebugRead((AR_CD_CNT0_ADDR+itf*4),&reg_val,1);
+	g_atm_dev.mib_counter.rx_err_cells += reg_val;
+	reg_val=0;
+	meiDebugWrite((AR_CD_CNT0_ADDR+itf*4),&reg_val,1);
+	to->ifInErrors = g_atm_dev.mib_counter.rx_err_cells;
+	
+	to->ifOutErrors = 0;
+#else
+	to->ifHCInOctets_h = 0;
+	to->ifHCInOctets_l = 0;
+	to->ifHCOutOctets_h = 0;
+	to->ifHCOutOctets_l = 0;
+	to->ifInErrors = 0;
+	to->ifOutErrors = 0;
+#endif
+	return 0;
+}
+
+/* Brief:	Return ATM AAL5 related MIB
+ * Parameter:
+ 	 atm_aal5_ifEntry_t
+ */
+int amazon_atm_aal5_mib(atm_aal5_ifEntry_t* to)
+{
+	u32 reg_l,reg_h;
+	//AAL5R	received Octets from ATM
+	reg_l = readl(AAL5_RIOL_ADDR);
+	reg_h = readl(AAL5_RIOM_ADDR);
+	g_atm_dev.mib_counter.rx_cnt_h +=reg_h;
+	if (reg_l + g_atm_dev.mib_counter.rx_cnt_l < reg_l){
+		g_atm_dev.mib_counter.rx_cnt_h++;
+	}
+	
+	g_atm_dev.mib_counter.rx_cnt_l+= reg_l;
+	//AAL5S	sent Octets to ATM
+	reg_l = readl(AAL5_SOOL_ADDR);
+	reg_h = readl(AAL5_SOOM_ADDR);
+	g_atm_dev.mib_counter.tx_cnt_h +=reg_h;
+	if (reg_l + g_atm_dev.mib_counter.tx_cnt_l < reg_l){
+		g_atm_dev.mib_counter.tx_cnt_h++;
+	}
+	g_atm_dev.mib_counter.tx_cnt_l+= reg_l;
+
+
+	g_atm_dev.mib_counter.tx_ppd += readl(CBM_AAL5ODIS_ADDR);
+	g_atm_dev.mib_counter.rx_drop += readl(CBM_AAL5IDIS_ADDR);
+	
+	//store 
+	to->ifHCInOctets_h = g_atm_dev.mib_counter.rx_cnt_h;
+	to->ifHCInOctets_l = g_atm_dev.mib_counter.rx_cnt_l;
+	to->ifHCOutOctets_h = g_atm_dev.mib_counter.tx_cnt_h;
+	to->ifHCOutOctets_l = g_atm_dev.mib_counter.tx_cnt_l;
+	to->ifOutDiscards = g_atm_dev.mib_counter.tx_drop;
+	to->ifInDiscards = g_atm_dev.mib_counter.rx_drop;
+
+	//Software provided counters
+	//packets passed to higher layer
+	to->ifInUcastPkts = g_atm_dev.mib_counter.rx;
+	//packets passed from higher layer
+	to->ifOutUcastPkts = g_atm_dev.mib_counter.tx;
+	//number of wrong downstream packets
+	to->ifInErrors = g_atm_dev.mib_counter.rx_err;
+	//number of wrong upstream packets
+	to->ifOutErros = g_atm_dev.mib_counter.tx_err;
+
+	return 0;
+}
+/* Brief:	Return ATM AAL5 VCC related MIB from internale use
+ * Parameter:
+ *	qid
+ *	atm_aal5_vcc_t
+ */
+static int __amazon_atm_vcc_mib(int qid, atm_aal5_vcc_t* to)
+{
+	//aal5VccCrcErrors
+	to->aal5VccCrcErrors = g_atm_dev.queues[qid].aal5VccCrcErrors;
+	to->aal5VccOverSizedSDUs =g_atm_dev.queues[qid].aal5VccOverSizedSDUs;
+	to->aal5VccSarTimeOuts = 0; //not supported yet
+	return 0;
+}
+/* Brief:	Return ATM AAL5 VCC related MIB from vpi/vci
+ * Parameter:	atm_vcc
+ * 	 atm_aal5_vcc_t
+ */
+int amazon_atm_vcc_mib_x(int vpi, int vci,atm_aal5_vcc_t* to)
+{
+	int qid=0;
+	int err=0;
+	qid =  amazon_atm_find_vpivci(vpi, vci);
+	if (qid >0 ){
+		err = __amazon_atm_vcc_mib(qid,to);
+	}else{
+		return -EINVAL;
+	}
+	return err;
+}
+
+
+/* Brief:	Return ATM AAL5 VCC related MIB
+ * Parameter:	atm_vcc
+ *	 atm_aal5_vcc_t
+ */
+int amazon_atm_vcc_mib(struct atm_vcc *vcc,atm_aal5_vcc_t* to)
+{
+	int qid=0;
+	int err=0;
+	qid =  amazon_atm_get_queue(vcc);
+	if (qid >0 ){
+		err = __amazon_atm_vcc_mib(qid,to);
+	}else{
+		return -EINVAL;
+	}
+	return err;
+}
+
+/* Brief: 	Close ATM connection
+ * Parameters: 	atm_vcc	- Pointer to VCC data structure
+ * Return: 	no
+ * Description:
+ * This function closes the given ATM connection
+ */
+void	amazon_atm_close(struct atm_vcc *vcc){
+	int i;
+	int qid=0;
+	u32 tmp1;
+	u8 * qd_addr;
+	unsigned long flags;
+	if (vcc == NULL){
+		AMAZON_TPE_EMSG("invalid parameter. vcc is null\n");
+		return;
+	}
+	u32 itf = (u32) vcc->itf;
+	//release bandwidth
+	if (vcc->qos.txtp.traffic_class == ATM_CBR){
+		g_atm_dev.ports[itf].tx_rem_cr += vcc->qos.txtp.max_pcr;
+		g_atm_dev.ports[itf].tx_cur_cr -= vcc->qos.txtp.max_pcr;
+	}else if (vcc->qos.txtp.traffic_class == ATM_VBR_RT){
+		g_atm_dev.ports[itf].tx_rem_cr += vcc->qos.txtp.max_pcr;
+		g_atm_dev.ports[itf].tx_cur_cr -= vcc->qos.txtp.max_pcr;
+	}else if (vcc->qos.txtp.traffic_class == ATM_VBR_NRT){
+		g_atm_dev.ports[itf].tx_rem_cr += vcc->qos.txtp.pcr;
+		g_atm_dev.ports[itf].tx_cur_cr -= vcc->qos.txtp.pcr;
+	}else if (vcc->qos.txtp.traffic_class == ATM_UBR_PLUS){
+		g_atm_dev.ports[itf].tx_rem_cr += vcc->qos.txtp.min_pcr;
+		g_atm_dev.ports[itf].tx_cur_cr -= vcc->qos.txtp.min_pcr;
+	}
+
+	qid = amazon_atm_get_queue(vcc);
+	if (qid == -EINVAL){
+		AMAZON_TPE_EMSG("unknown vcc %u.%u.%u\n", vcc->itf, vcc->vpi, vcc->vci);
+		return;
+	}
+	local_irq_save(flags);
+	//Disable HTU entry
+	i=0;
+	while ((tmp1 = readl(HTU_RAMSTAT_ADDR))!=0 && i < HTU_RAM_ACCESS_MAX) i++;
+ 	if (i == HTU_RAM_ACCESS_MAX){
+		AMAZON_TPE_EMSG("HTU RAM ACCESS out of time\n");
+	}
+
+	// write address register
+	AMAZON_WRITE_REGISTER_L(qid - CBM_DEFAULT_Q_OFFSET, HTU_RAMADDR_ADDR);
+	// invalidate the connection
+	AMAZON_WRITE_REGISTER_L(0, HTU_RAMDAT1_ADDR);
+	// write command
+	AMAZON_WRITE_REGISTER_L(HTU_RAMCMD_WR,HTU_RAMCMD_ADDR);
+	
+	qd_addr = (u8 *) KSEG1ADDR((unsigned long)g_atm_dev.cbm.qd_addr);
+#ifdef AMAZON_ATM_DEBUG
+	tmp1 = readl(qd_addr+qid*CBM_QD_SIZE+0x8) & 0xffff;
+	AMAZON_TPE_DMSG("TX queue has %u cells \n", tmp1);
+	tmp1 = readl( qd_addr+(qid+CBM_RX_OFFSET)*CBM_QD_SIZE+0x08)&0xffff;
+	AMAZON_TPE_DMSG("RX queue has %u cells \n", tmp1);
+#endif	
+	// set threshold of txqueue to 0
+	tmp1 = readl(qd_addr+qid*CBM_QD_SIZE+0x0c);
+	tmp1&= (~ CBM_QD_W3_THRESHOLD_MASK);
+	AMAZON_WRITE_REGISTER_L(tmp1, (qd_addr+qid*CBM_QD_SIZE+0x0c));
+	// set threshold of rxqueue to 0
+	tmp1 = readl( qd_addr+(qid+CBM_RX_OFFSET)*CBM_QD_SIZE+0x0c);
+	tmp1&= (~ CBM_QD_W3_THRESHOLD_MASK);
+	AMAZON_WRITE_REGISTER_L(tmp1,(qd_addr+(qid+CBM_RX_OFFSET)*CBM_QD_SIZE+0x0c));
+
+	//clear internal mapping
+	amazon_atm_clear_vcc(qid);
+	amazon_atm_clear_vcc(qid+CBM_RX_OFFSET);
+
+	local_irq_restore(flags);
+}
+
+
+/* Brief:	initialize internal data structure
+ */
+static void atm_constructor(amazon_atm_dev_t * dev)
+{
+	int i;
+	memset(dev,0,sizeof(amazon_atm_dev_t));
+	atm_init_parameters(dev);
+	//internal: queue "free" flag
+	for(i=1;i<AMAZON_ATM_MAX_QUEUE_NUM;i++) {
+		//dev->queues[i].vcc=NULL;
+		dev->queues[i].free = 1;
+	}
+	for(i=0;i<AMAZON_ATM_PORT_NUM;i++){
+		dev->ports[i].tx_rem_cr = dev->ports[i].tx_max_cr;
+	}
+	//MIB
+	atomic_set(&dev->dma_tx_free_0,1); //initially there should be free descriptors
+}
+
+/* Brief:	return round up base-2 logarithm
+ */
+static inline int get_log_2(u32 value)
+{
+	int i=0,j=1;
+	while (i<11){
+		if (j>=value) break;
+		j=j<<1;
+		i++;
+	}
+	AMAZON_TPE_DMSG("round up base-2 logarithm of %u is %u\n", value, i);
+	return i;
+}
+
+/* Brief:	TPE hardware initialization
+ * Parameter:	specifiy the configurations of the hardware
+ */
+static inline int atm_init_hard(amazon_atm_dev_t * dev)
+{
+	int i;
+	u32 tmp1, tmp2, tmp3;
+	u8 * mem_addr=NULL;
+	u8 * qd_addr=NULL;
+	//PMU power on the module 1st
+	*(AMAZON_PMU_PWDCR) = 	(*AMAZON_PMU_PWDCR) | (AMAZON_PMU_PWDCR_TPE);
+	//Reset the module
+	*(AMAZON_RST_REQ) = (* AMAZON_RST_REQ) | (AMAZON_RST_REQ_TPE);
+	mb();
+	mdelay(100);
+	*(AMAZON_RST_REQ) = (* AMAZON_RST_REQ) & (~(AMAZON_RST_REQ_TPE));
+	mb();
+	
+	unsigned long qsb_clk = amazon_get_fpi_hz()>>1;
+	/*********allocate & arrange memory for CBM *********/
+	if (dev->cbm.mem_addr == NULL){
+		dev->cbm.allocated = 1;
+		mem_addr = (u8 *)__get_free_pages(GFP_KERNEL, get_log_2(((CBM_CELL_SIZE * dev->cbm.free_cell_cnt) >>PAGE_SHIFT) + 1));
+		if (mem_addr != NULL){ 
+			dev->cbm.mem_addr = mem_addr;
+		} else	{
+			goto init_no_mem;
+		}
+	}
+	if (dev->cbm.qd_addr == NULL){
+#ifdef CONFIG_USE_VENUS
+		//to work around a bug, bit15 of QDOFF address should be 1,Aug4, 2004
+		//thus, we allocate 64k memory		
+		qd_addr = (u8 *)__get_free_pages(GFP_KERNEL, 4);
+		if (qd_addr != NULL) {
+			dev->cbm.qd_addr_free = (u8*) (((unsigned long) qd_addr));
+			dev->cbm.qd_addr = (u8*) (((unsigned long) qd_addr) | 0x8000);
+		}else{
+			goto init_no_mem;
+		}
+#else	//CONFIG_USE_VENUS
+		qd_addr = (u8 *)kmalloc( CBM_QD_SIZE * AMAZON_ATM_MAX_QUEUE_NUM, GFP_KERNEL);
+		if (qd_addr != NULL) {
+			dev->cbm.qd_addr = qd_addr;
+		}else {
+			goto init_no_mem;
+		}
+#endif //CONFIG_USE_VENUS			
+	}
+//#ifndef CONFIG_MIPS_UNCACHED
+	mem_addr = (u8 *)KSEG1ADDR((unsigned long)dev->cbm.mem_addr);
+	qd_addr = (u8 *)KSEG1ADDR((unsigned long)dev->cbm.qd_addr);
+//#endif
+	//CBM reset cell queue memory, 64 bytes / cell
+	memset_io(mem_addr, 0, CBM_CELL_SIZE * dev->cbm.free_cell_cnt);
+	//make a link list, last 4 bytes is pointer
+	for(i=1;i<dev->cbm.free_cell_cnt;i++){
+		AMAZON_WRITE_REGISTER_L(CPHYSADDR((mem_addr + CBM_CELL_SIZE * i)),(mem_addr + CBM_CELL_SIZE * (i-1) + 0x3c));
+	}
+	//reset queue descriptor
+	memset_io(qd_addr, 0, CBM_QD_SIZE * AMAZON_ATM_MAX_QUEUE_NUM);
+	//init word 0-2 of q0 (free cell list)
+	//address of last cell
+	AMAZON_WRITE_REGISTER_L(CPHYSADDR((mem_addr + CBM_CELL_SIZE * (dev->cbm.free_cell_cnt-1))), qd_addr);
+	//address of first cell
+	AMAZON_WRITE_REGISTER_L(CPHYSADDR((mem_addr)), (qd_addr + 4));
+	//no. of free cells
+	AMAZON_WRITE_REGISTER_L(dev->cbm.free_cell_cnt,(qd_addr + 8));
+	//init q descriptor for OAM receiving
+	AMAZON_WRITE_REGISTER_L((CBM_QD_W3_INT_ACA | (divide_by_64_round_up(oam_q_threshold)&0xff)<< CBM_QD_W3_THRESHOLD_SHIFT), (qd_addr + AMAZON_ATM_OAM_Q_ID * CBM_QD_SIZE + 0x0c));
+//	AMAZON_WRITE_REGISTER_L((CBM_QD_W3_INT_ACA | (u32)oam_q_threshold<< CBM_QD_W3_THRESHOLD_SHIFT), (qd_addr + AMAZON_ATM_OAM_Q_ID * CBM_QD_SIZE + 0x0c));
+	//config CBM
+	//set offset address and threshold
+	AMAZON_WRITE_REGISTER_L(CPHYSADDR(qd_addr), CBM_QDOFF_ADDR);
+	AMAZON_WRITE_REGISTER_L(((dev->cbm.nrt_thr&CBM_THR_MASK)|CBM_WM_3_1), CBM_NRTTHR_ADDR);
+	AMAZON_WRITE_REGISTER_L(((dev->cbm.clp0_thr&CBM_THR_MASK)|CBM_WM_3_1), CBM_CLP0THR_ADDR);
+	AMAZON_WRITE_REGISTER_L(((dev->cbm.clp1_thr&CBM_THR_MASK)|CBM_WM_3_1), CBM_CLP1THR_ADDR);
+	//config interrupts
+	AMAZON_WRITE_REGISTER_L( CBM_IMR_MASK & (~(CBM_IMR_ACA|CBM_IMR_Q0E|CBM_IMR_Q0I|CBM_IMR_RDE|CBM_IMR_OPF|CBM_IMR_ERR             	
+#ifdef AMAZON_ATM_DEBUG	
+						|CBM_IMR_DISC|CBM_IMR_QFD|CBM_IMR_NFCA|CBM_IMR_CLP1TR|CBM_IMR_CLP0TR|CBM_IMR_NRTTR|CBM_IMR_QTR
+#endif	
+#ifdef AMAZON_TPE_SCR
+						|CBM_IMR_EF 
+#endif
+							)), CBM_IMR0_ADDR);
+	AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_CBM_INT, CBM_SRC0_ADDR);
+	
+	//HTU
+	//RAM entry for number of possible connections per interface
+	tmp1 = dev->ports[0].max_conn?dev->ports[0].max_conn-1:0;
+	AMAZON_WRITE_REGISTER_L(tmp1, HTU_RX0_ADDR);
+	for(i=1;i<AMAZON_ATM_PORT_NUM;i++){
+		tmp1+=dev->ports[i].max_conn;
+		AMAZON_WRITE_REGISTER_L(tmp1, HTU_RX0_ADDR + 4 * i);
+	}
+	dev->cbm.max_q_off = tmp1+1;
+	//Queue ID for OAM/RM/Other cells
+	AMAZON_WRITE_REGISTER_L (AMAZON_ATM_OAM_Q_ID, HTU_DESTOAM_ADDR);
+	AMAZON_WRITE_REGISTER_L( AMAZON_ATM_RM_Q_ID, HTU_DESTRM_ADDR);
+	AMAZON_WRITE_REGISTER_L( AMAZON_ATM_OTHER_Q_ID, HTU_DESTOTHER_ADDR);
+	//Timeout
+	AMAZON_WRITE_REGISTER_L((u32) HTUTIMEOUT, HTU_TIMEOUT_ADDR);
+#ifdef AMAZON_ATM_DEBUG
+        AMAZON_WRITE_REGISTER_L((u32) HTU_ISR_MASK 
+				&(~(HTU_ISR_NE|HTU_ISR_TORD|HTU_ISR_OTOC|HTU_ISR_ONEC|HTU_ISR_PNE|HTU_ISR_PT)), HTU_IMR0_ADDR);
+	AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS|SRC_SRE_ENABLE|AMAZON_HTU_INT,HTU_SRC0_ADDR);
+#endif
+	//QSB
+	//global setting, TstepC, SBL, Tau
+	//Tau
+	AMAZON_WRITE_REGISTER_L(dev->qsb.tau, QSB_TAU_ADDR);
+	//SBL
+	AMAZON_WRITE_REGISTER_L(dev->qsb.sbl, QSB_SBL_ADDR);
+	//tstep
+	AMAZON_WRITE_REGISTER_L(dev->qsb.tstepc>>1, QSB_CONFIG_ADDR);
+
+	//port settting
+	for(i=0;i<AMAZON_ATM_PORT_NUM;i++){
+		if ( (dev->ports[i].enable) && (dev->ports[i].tx_max_cr!=0) ){
+			tmp1 = ((qsb_clk * dev->qsb.tstepc) >>1) / dev->ports[i].tx_max_cr;
+			tmp2 = tmp1 / 64;	//integer value of Tsb
+			tmp3 = tmp1%64 + 1; 	//fractional part of Tsb
+			//carry over to integer part (?)
+			if (tmp3 == 64) {
+				tmp3 = 0;
+				tmp2++;
+			}
+			if (tmp2 == 0){
+				tmp2 = 1;
+				tmp3 = 1;
+			}
+			//1. set mask 2. write value to data transfer register 3. start the transfer
+			//SCT(FracRate)
+			AMAZON_WRITE_REGISTER_L(QSB_SET_SCT_MASK, QSB_RTM_ADDR);
+			AMAZON_WRITE_REGISTER_L(tmp3,QSB_RTD_ADDR);
+			AMAZON_WRITE_REGISTER_L(((QSB_TABLESEL_SCT<<QSB_TABLESEL_SHIFT)|QSB_RAMAC_REG_LOW|QSB_WRITE|i),QSB_RAMAC_ADDR);
+			//SPT(SBV + PN + IntRage)
+			AMAZON_WRITE_REGISTER_L(QSB_SET_SPT_MASK, QSB_RTM_ADDR);
+			AMAZON_WRITE_REGISTER_L(QSB_SPT_SBVALID|tmp2|(i<<16),QSB_RTD_ADDR);
+			AMAZON_WRITE_REGISTER_L(((QSB_TABLESEL_SPT<<QSB_TABLESEL_SHIFT)|QSB_RAMAC_REG_LOW|QSB_WRITE|i),QSB_RAMAC_ADDR);
+
+
+		}
+	}
+	
+	//SWIE: Setup Service Request Control Registers to enable interrupts
+	AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_SWIE_INT, SWIE_ISRC_ADDR);
+	AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_SWIE_INT, SWIE_ESRC_ADDR);
+
+	wmb();
+#ifdef AMAZON_TPE_TEST_AAL5_INT
+	AMAZON_WRITE_REGISTER_L(AAL5R_ISR_FE,AAL5_RIMR0_ADDR);
+	AMAZON_WRITE_REGISTER_L(0, AAL5_SIMR0_ADDR);
+	AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_AAL5_INT,AAL5_SSRC0_ADDR);
+	AMAZON_WRITE_REGISTER_L(SRC_CLRR|SRC_TOS_MIPS | SRC_SRE_ENABLE | AMAZON_AAL5_INT,AAL5_RSRC0_ADDR);
+#endif //AMAZON_TPE_TEST_AAL5_INT
+
+	AMAZON_WRITE_REGISTER_L(dev->aal5.tx_max_sdu,AAL5_SMFL_ADDR);	
+ 	AMAZON_WRITE_REGISTER_L(dev->aal5.rx_max_sdu,AAL5_RMFL_ADDR);
+	AMAZON_WRITE_REGISTER_L(AAL5_SCMD_MODE_POLL // enable polling mode
+ 					|AAL5_SCMD_SS
+ 					|AAL5_SCMD_AR
+					,AAL5_SCMD_ADDR);
+	//start CBM
+ 	AMAZON_WRITE_REGISTER_L(CBM_CFG_START,CBM_CFG_ADDR);
+ 	wmb();
+	return 0;
+init_no_mem:
+	if (mem_addr != NULL) free_pages((unsigned long)mem_addr,get_log_2(((CBM_CELL_SIZE * dev->cbm.free_cell_cnt) >>PAGE_SHIFT) + 1));
+	
+#ifdef CONFIG_USE_VENUS	
+	//to work around a bug, bit15 of QDOFF address should be 1
+	if (qd_addr != NULL) free_pages((unsigned long)qd_addr,4);
+#else //CONFIG_USE_VENUS
+	if (qd_addr != NULL) kfree(qd_addr);	
+#endif //CONFIG_USE_VENUS	
+	return -ENOMEM;
+}
+
+/*	
+ *	Brief:	Create entry in /proc for status information
+ */
+void atm_create_proc(void)
+{
+	create_proc_read_entry("amazon_atm", 0,NULL, amazon_atm_read_procmem,(void*)PROC_ATM);
+        create_proc_read_entry("amazon_atm_mib", 0,NULL, amazon_atm_read_procmem,(void*)PROC_MIB);
+        create_proc_read_entry("amazon_atm_vcc", 0,NULL, amazon_atm_read_procmem,(void*)PROC_VCC);
+#if 0	
+	create_proc_read_entry("amazon_atm_aal5", 0,NULL, amazon_atm_read_procmem,(void*)PROC_AAL5);
+        create_proc_read_entry("amazon_atm_cbm", 0,NULL, amazon_atm_read_procmem,(void*)PROC_CBM);
+        create_proc_read_entry("amazon_atm_htu", 0,NULL, amazon_atm_read_procmem,(void*)PROC_HTU);
+        create_proc_read_entry("amazon_atm_qsb", 0,NULL, amazon_atm_read_procmem,(void*)PROC_QSB);
+        create_proc_read_entry("amazon_atm_swie", 0,NULL, amazon_atm_read_procmem,(void*)PROC_SWIE);
+#endif
+}
+
+/*
+ *	Brief:	Delete entry in /proc for status information
+ */
+void atm_delete_proc(void)
+{
+	remove_proc_entry("amazon_atm", NULL);
+        remove_proc_entry("amazon_atm_mib", NULL);
+        remove_proc_entry("amazon_atm_vcc", NULL);
+#if 0	
+	remove_proc_entry("amazon_atm_aal5", NULL);
+        remove_proc_entry("amazon_atm_cbm", NULL);
+        remove_proc_entry("amazon_atm_htu", NULL);
+        remove_proc_entry("amazon_atm_qsb", NULL);
+        remove_proc_entry("amazon_atm_swie", NULL);
+#endif	
+}
+/* Brief: 	Initialize ATM module
+ * Parameters: 	no
+ * Return: 	&g_atm_dev - sucessful
+ *		NULL	- fails: 
+ *			1. invalid parameter
+ * 			2. No memory available
+ * Description:
+ *  This function configure the TPE components according to the input info,
+ *	-CBM
+ *	-HTU
+ *	-QSB
+ *	-AAL5
+ *
+ */
+amazon_atm_dev_t * amazon_atm_create(void)
+{
+	int i;
+	AMAZON_TPE_DMSG("atm_init\n");
+	/************initialize global data structure****************/
+	atm_constructor(&g_atm_dev);
+	/***********allocate kernel resources****************/
+	//bottom halfs for SWEX
+	swex_start_task.routine = amazon_atm_swex;
+	swex_start_task.data = NULL;
+	swex_complete_task.routine = amazon_atm_swex_push;
+	swex_complete_task.data = NULL;
+#ifdef AMAZON_TPE_SCR
+	a5r_task.routine = amazon_atm_a5r;
+	a5r_task.data = NULL;
+#endif	//AMAZON_TPE_SCR
+	//SWIN semaphore
+	sema_init(&(g_atm_dev.swie.in_sem), 1);
+	//SWIE lock
+	clear_bit(SWIE_LOCK, &(g_atm_dev.swie.lock));
+	//SWIE wait queue
+	init_waitqueue_head(&(g_atm_dev.swie.sleep));
+	atm_create_proc();
+		
+	//register DMA
+	memset(&g_dma_dev,0,sizeof(struct dma_device_info));
+	strcpy(g_dma_dev.device_name,"TPE");
+	g_dma_dev.weight=1; 
+	g_dma_dev.num_tx_chan=2;
+     	g_dma_dev.num_rx_chan=2; 
+     	g_dma_dev.ack=1;
+     	g_dma_dev.tx_burst_len=4;
+     	g_dma_dev.rx_burst_len=4;
+     	//DMA TX
+
+	for(i=0;i<1;i++){
+		g_dma_dev.tx_chan[i].weight=QOS_DEFAULT_WGT;
+       		g_dma_dev.tx_chan[i].desc_num=10;
+       		g_dma_dev.tx_chan[i].packet_size=g_atm_dev.aal5.tx_max_sdu + AAL5S_INBOUND_HEADER;
+       		g_dma_dev.tx_chan[i].control=1;
+     	}
+	//DMA RX
+     	for(i=0;i<2;i++){
+       		g_dma_dev.rx_chan[i].weight=QOS_DEFAULT_WGT;
+		/* BingTao's suggestion, change from 5->10 will prevent packet loss in NO_TX_INT mode */
+		g_dma_dev.rx_chan[i].desc_num=10;
+		g_dma_dev.rx_chan[i].packet_size=(g_atm_dev.aal5.rx_max_sdu + AAL5R_TRAILER_LEN+0x10f)&(~0xf);
+		g_dma_dev.rx_chan[i].control=1;
+     	}
+	g_dma_dev.intr_handler=amazon_atm_dma_handler;
+    	g_dma_dev.buffer_alloc=amazon_atm_alloc_rx;
+     	g_dma_dev.buffer_free=amazon_atm_free_tx;
+     	dma_device_register(&g_dma_dev);
+/***********intialize the atm hardware ****************/
+	if ( atm_init_hard(&g_atm_dev) != 0){
+		return NULL;
+	}
+	//start CBM
+	AMAZON_WRITE_REGISTER_L(CBM_CFG_START,CBM_CFG_ADDR);
+	wmb();
+
+	//Start HTU
+	AMAZON_WRITE_REGISTER_L(HTU_CFG_START ,HTU_CFG_ADDR);
+	wmb();
+
+
+	// Register interrupts for insertion and extraction
+	request_irq(AMAZON_SWIE_INT, amazon_atm_swie_isr, SA_INTERRUPT, "tpe_swie", NULL);
+	request_irq(AMAZON_CBM_INT, amazon_atm_cbm_isr, SA_INTERRUPT, "tpe_cbm", NULL);
+#ifdef AMAZON_ATM_DEBUG
+	request_irq(AMAZON_HTU_INT , amazon_atm_htu_isr, SA_INTERRUPT, "tpe_htu", NULL);
+#endif
+#ifdef AMAZON_TPE_TEST_AAL5_INT	
+	request_irq(AMAZON_AAL5_INT, amazon_atm_aal5_isr, SA_INTERRUPT, "tpe_aal5", NULL);
+#endif
+	return &g_atm_dev;
+}
+
+/* Brief: 	clean up atm
+ * Parameters: 	no
+ * Return: 	no
+ * Description:
+ *  Disable the device.
+ */
+void	amazon_atm_cleanup(void){
+	int i;
+	clear_bit(SWIE_LOCK, &(g_atm_dev.swie.lock));
+	wake_up(&g_atm_dev.swie.sleep);
+	up(&g_atm_dev.swie.in_sem);
+	// diable SWIE interrupts
+	AMAZON_WRITE_REGISTER_L(0, SWIE_ISRC_ADDR);
+	AMAZON_WRITE_REGISTER_L(0, SWIE_ESRC_ADDR);
+	wmb();
+
+	// Disable schedulers ( including interrupts )-----------------------
+	for (i = 0; i < AMAZON_ATM_PORT_NUM; i++);
+	{
+		AMAZON_WRITE_REGISTER_L(QSB_SET_SPT_SBVALID_MASK, QSB_RTM_ADDR);
+		AMAZON_WRITE_REGISTER_L( 0 ,QSB_RTD_ADDR);
+		AMAZON_WRITE_REGISTER_L( (QSB_TABLESEL_SPT<<QSB_TABLESEL_SHIFT)
+						| QSB_RAMAC_REG_LOW
+						| QSB_WRITE
+						| i,
+						QSB_RAMAC_ADDR);
+	}
+	// disable QSB_Interrupts
+	AMAZON_WRITE_REGISTER_L( 0, QSB_IMR_ADDR);
+	AMAZON_WRITE_REGISTER_L( 0, QSB_SRC_ADDR);
+	// disable CBM interrupts
+	AMAZON_WRITE_REGISTER_L( 0	, CBM_IMR0_ADDR);
+	AMAZON_WRITE_REGISTER_L( 0 , CBM_SRC0_ADDR);
+	// set CBM start bit to 0
+	AMAZON_WRITE_REGISTER_L(0,CBM_CFG_ADDR);
+	// request hardware extraction of queue 0, wich should force the CBM
+	// to recognize that the start bit is not set
+	AMAZON_WRITE_REGISTER_L(CBM_HWEXPAR_PN_A5, CBM_HWEXPAR0_ADDR);
+	// write frame extraction command into the hw extract command register
+	AMAZON_WRITE_REGISTER_L(CBM_HWEXCMD_FE0, CBM_HWEXCMD_ADDR);
+	// disable htu
+ 	// disable all HTU interrupts
+	AMAZON_WRITE_REGISTER_L(0  ,HTU_IMR0_ADDR);
+	AMAZON_WRITE_REGISTER_L(0  ,HTU_SRC0_ADDR);
+	
+	if (g_atm_dev.cbm.allocated){
+		free_pages((unsigned long)g_atm_dev.cbm.mem_addr, get_log_2(((CBM_CELL_SIZE * g_atm_dev.cbm.free_cell_cnt) >>PAGE_SHIFT)+1));
+#ifdef CONFIG_USE_VENUS
+		//to work around a bug, bit15 of QDOFF address should be 1
+		free_pages((unsigned long)g_atm_dev.cbm.qd_addr_free,4);
+#else //CONFIG_USE_VENUS
+		kfree(g_atm_dev.cbm.qd_addr);
+#endif //CONFIG_USE_VENUS						
+	}
+	atm_delete_proc();
+	// free interrupts for insertion and extraction
+	dma_device_unregister(&g_dma_dev);
+	free_irq(AMAZON_SWIE_INT, NULL);
+	free_irq(AMAZON_CBM_INT, NULL);
+#ifdef AMAZON_ATM_DEBUG
+	free_irq(AMAZON_HTU_INT, NULL);
+#endif
+#ifdef AMAZON_TPE_TEST_AAL5_INT
+	free_irq(AMAZON_AAL5_INT, NULL);
+#endif
+
+}
+
+/************************ ATM network interface ***********************************************/
+/*	Brief:		getsockopt
+ */
+int amazon_atm_getsockopt(struct atm_vcc *vcc, int level, int optname, char *optval, int optlen)
+{
+	int err=0;
+	atm_aal5_vcc_t mib_vcc;
+	AMAZON_TPE_DMSG("1\n");
+	switch (optname){
+		case	SO_AMAZON_ATM_MIB_VCC:
+			AMAZON_TPE_DMSG("2\n");
+			err = amazon_atm_vcc_mib(vcc, &mib_vcc);
+			AMAZON_TPE_DMSG("%u\n",mib_vcc.aal5VccCrcErrors);
+                        err = copy_to_user((void *)optval,&mib_vcc, sizeof(mib_vcc));
+                        AMAZON_TPE_DMSG("err %u\n",err);
+                        break;
+                default:
+                	return -EFAULT;
+	}
+	return err;
+}
+
+/*	Brief:		IOCTL
+ */
+
+int amazon_atm_ioctl(struct atm_dev *dev,unsigned int cmd,void *arg)
+{
+	int     err=0;
+	//MIB
+	atm_cell_ifEntry_t mib_cell;
+	atm_aal5_ifEntry_t mib_aal5;
+	atm_aal5_vcc_x_t mib_vcc;
+	if (_IOC_TYPE(cmd) != AMAZON_ATM_IOC_MAGIC) return -ENOTTY;
+	if (_IOC_NR(cmd) > AMAZON_ATM_IOC_MAXNR) return -ENOTTY;
+
+	if (_IOC_DIR(cmd) & _IOC_READ)
+		err = !access_ok(VERIFY_WRITE, (void *)arg, _IOC_SIZE(cmd));
+	else if (_IOC_DIR(cmd) & _IOC_WRITE)
+		err =  !access_ok(VERIFY_READ, (void *)arg, _IOC_SIZE(cmd));
+	if (err) {
+		AMAZON_TPE_EMSG("acess verification fails \n");
+		return -EFAULT;
+	}
+	switch(cmd) {
+		case AMAZON_ATM_MIB_CELL:
+			err = amazon_atm_cell_mib(&mib_cell,(u32)arg);
+			if (err==0){
+				err = __copy_to_user((void *)arg,&mib_cell,sizeof(mib_cell));
+			}else{
+				AMAZON_TPE_EMSG("cannot get MIB ATM_CELL\n");
+			}
+			break;
+		case AMAZON_ATM_MIB_AAL5:
+			err = amazon_atm_aal5_mib(&mib_aal5);
+			if (err==0){
+				err=__copy_to_user(arg, &mib_aal5, sizeof(mib_aal5));
+			}else{
+				AMAZON_TPE_EMSG("cannot get MIB ATM_AAL5\n");
+			}
+			break;
+		case AMAZON_ATM_MIB_VCC:
+			err=__copy_from_user(&mib_vcc,arg, sizeof(mib_vcc));
+			AMAZON_TPE_DMSG("return of copy_from_user %x\n",err);
+			err = amazon_atm_vcc_mib_x(mib_vcc.vpi, mib_vcc.vci, &(mib_vcc.mib_vcc));
+			if (err==0){
+				err=__copy_to_user(arg, &mib_vcc, sizeof(mib_vcc));	
+			}else{
+				AMAZON_TPE_EMSG("cannot get MIB ATM_VCC\n");
+			}
+				
+    		default:
+    			return -ENOTTY;
+	}
+	return err;
+}
+/*	Brief:	return a link list of OAM related time stamp info
+ *	Parameter:	none
+ *	Return:	
+ 		a link list of "struct oam_last_activity" data
+ *	Description:
+ 		Each time, a F4/F5 cell or AAL5 packet is received, the time stamp is updated.
+		Through this call, u get a list of this time stamp for all active connection.
+		Please note that u have read-only access.
+ */
+const struct oam_last_activity* get_oam_time_stamp()
+{
+	int i,j;
+	for(i=CBM_DEFAULT_Q_OFFSET+CBM_RX_OFFSET,j=0;i<CBM_RX_OFFSET+CBM_DEFAULT_Q_OFFSET+AMAZON_ATM_MAX_VCC_NUM;i++){
+		if (g_atm_dev.queues[i].free != 1 && g_atm_dev.queues[i].vcc != NULL){
+			//active connection
+			if (j !=0 ){
+				g_oam_time_stamp[j-1].next = &g_oam_time_stamp[j];
+			}
+			g_oam_time_stamp[j].vpi = g_atm_dev.queues[i].vcc->vpi;
+			g_oam_time_stamp[j].vci = g_atm_dev.queues[i].vcc->vci;
+			g_oam_time_stamp[j].stamp = g_atm_dev.queues[i].access_time;
+			g_oam_time_stamp[j].next = NULL;
+			j++;
+		}
+	}
+	if (j==0) {
+		return NULL;
+	}else{
+		return g_oam_time_stamp;
+	}
+}
+
+
+/*	Brief:	call back routine for rx
+ *	Parameter:
+ *		vcc atm_vcc pointer
+ *		skb	data if no error
+ 		err	error flag, 0: no error, 1:error
+ *	Return:	
+ *		0	
+ *		<>0	cannot push up
+ *	Description:
+ *		release the packet if cannot push up
+ */
+static	int amazon_atm_net_push(struct atm_vcc *vcc,struct sk_buff *skb, int err)
+{
+	if (err){
+		if (vcc && vcc->stats) {
+			atomic_inc(&vcc->stats->rx_err);
+		}
+	}else{	
+		ATM_SKB(skb)->vcc = vcc;
+	
+		if (!atm_charge(vcc, skb->truesize)){
+			//no space this vcc
+			AMAZON_TPE_EMSG("no space for this vcc\n");
+			dev_kfree_skb_any(skb);
+			return -ENOMEM;
+		}
+		atomic_inc(&vcc->stats->rx);
+		AMAZON_TPE_DMSG("push to vcc\n");
+		vcc->push(vcc,skb);
+	}
+	return 0;
+}
+int	amazon_atm_net_send_oam(struct atm_vcc*vcc, void *cell, int flags)
+{
+	return amazon_atm_send_oam(vcc,cell,flags);
+}
+
+int	amazon_atm_net_send(struct atm_vcc *vcc,struct sk_buff *skb)
+{
+	int err=0;
+	if (vcc->qos.aal == ATM_AAL0 || vcc->qos.aal == ATM_AAL5) {
+		err=amazon_atm_send(vcc,skb);
+	}else{
+		//not supported
+		err =  -EPROTONOSUPPORT;
+	}
+	if (err){
+		atomic_inc(&vcc->stats->tx_err);
+	}else{
+		atomic_inc(&vcc->stats->tx);
+	}
+	AMAZON_TPE_DMSG("sent, tx_inuse:%u\n", atomic_read(&vcc->tx_inuse));
+	return err;
+}
+
+int	amazon_atm_net_open(struct atm_vcc *vcc,short vpi, int vci)
+{
+	vcc->itf = (int)  vcc->dev->dev_data;
+	vcc->vpi = vpi;
+	vcc->vci = vci;
+	return(amazon_atm_open(vcc,amazon_atm_net_push));
+}
+
+static int amazon_atm_change_qos(struct atm_vcc *vcc, struct atm_qos *qos, int flgs)
+{
+	int qid;
+	
+	if (vcc == NULL || qos == NULL){
+		AMAZON_TPE_EMSG("invalid parameters\n");
+		return -EINVAL;
+	}
+	qid = amazon_atm_get_queue(vcc);
+	if (valid_qid(qid) != 1) {
+		AMAZON_TPE_EMSG("no vcc connection opened\n");
+		return -EINVAL;
+	}
+	set_qsb(vcc,qos,qid);
+	return 0;
+}
+
+static struct atmdev_ops amazon_atm_ops = {
+   open:	amazon_atm_net_open,
+   close:	amazon_atm_close,
+   ioctl:	amazon_atm_ioctl,
+   send:	amazon_atm_net_send,
+   send_oam:	amazon_atm_net_send_oam,
+//   getsockopt:	amazon_atm_getsockopt,
+   change_qos:	amazon_atm_change_qos,
+//   proc_read:	amazon_atm_proc_read,
+   owner:	THIS_MODULE,
+};				// ATM device callback functions
+
+/*
+ * brief "/proc" function
+ */
+int amazon_atm_read_procmem(char *buf, char **start, off_t offset,int count, int *eof, void *data)
+{
+	int buf_off=0;	/* for buf */
+	int i=0,j=0;
+	int type= (u32)data;//which module
+	atm_aal5_ifEntry_t mib_aal5;
+	atm_cell_ifEntry_t mib_cell;
+	atm_aal5_vcc_t mib_vcc;
+    	switch(type){
+		case PROC_MIB:
+			//MIB counter
+			amazon_atm_aal5_mib(&mib_aal5);
+			//TX:
+			buf_off+=sprintf(buf+buf_off,"\n============= AAL5 Upstream =========\n");
+			buf_off+=sprintf(buf+buf_off,"received %u (pkts) from upper layer\n", mib_aal5.ifOutUcastPkts);
+			buf_off+=sprintf(buf+buf_off,"errors: %u (pkts)\n",mib_aal5.ifOutErros);
+			buf_off+=sprintf(buf+buf_off,"discards: %u (ptks)\n", mib_aal5.ifOutDiscards);
+			buf_off+=sprintf(buf+buf_off,"transmitted: %x-%x (bytes) \n",
+					mib_aal5.ifHCOutOctets_h, mib_aal5.ifHCOutOctets_l);
+			//RX:
+			buf_off+=sprintf(buf+buf_off,"\n============= AAL5 Downstream =========\n");
+			buf_off+=sprintf(buf+buf_off,"received %x-%x (bytes)\n",
+					mib_aal5.ifHCInOctets_h,mib_aal5.ifHCInOctets_l);
+			buf_off+=sprintf(buf+buf_off,"discards: %u (ptks)\n",mib_aal5.ifInDiscards);
+			buf_off+=sprintf(buf+buf_off,"errors: %u (ptks)\n",mib_aal5.ifInErrors);
+			buf_off+=sprintf(buf+buf_off,"passed %u (ptks) to upper layer\n",mib_aal5.ifInUcastPkts);
+			
+			//Cell level
+			buf_off+=sprintf(buf+buf_off,"\n============= ATM Cell =========\n");
+			amazon_atm_cell_mib(&mib_cell,0);
+#ifdef AMAZON_TPE_READ_ARC			
+			buf_off+=sprintf(buf+buf_off,"Port 0: downstream received: %x-%x (bytes)\n",mib_cell.ifHCInOctets_h,mib_cell.ifHCInOctets_l);
+			buf_off+=sprintf(buf+buf_off,"Port 0: upstream transmitted: %x-%x (bytes)\n",mib_cell.ifHCOutOctets_h,mib_cell.ifHCOutOctets_l);
+			buf_off+=sprintf(buf+buf_off,"Port 0: downstream errors: %u (cells)\n",mib_cell.ifInErrors);
+			amazon_atm_cell_mib(&mib_cell,1);
+			buf_off+=sprintf(buf+buf_off,"Port 1: downstream received: %x-%x (bytes)\n",mib_cell.ifHCInOctets_h,mib_cell.ifHCInOctets_l);
+			buf_off+=sprintf(buf+buf_off,"Port 1: upstream transmitted: %x-%x (bytes)\n",mib_cell.ifHCOutOctets_h,mib_cell.ifHCOutOctets_l);
+			buf_off+=sprintf(buf+buf_off,"Port 1: downstream errors: %u (cells)\n",mib_cell.ifInErrors);
+#endif
+			buf_off+=sprintf(buf+buf_off,"HTU discards: %u (cells)\n",mib_cell.ifInUnknownProtos);
+			
+			buf_off+=sprintf(buf+buf_off,"\n====== Specials =====\n");
+			buf_off+=sprintf(buf+buf_off,"AAL5S PPD: %u (cells)\n",g_atm_dev.mib_counter.tx_ppd);
+#ifdef AMAZON_TPE_SCR
+			buf_off+=sprintf(buf+buf_off,"Reassembly wait: %u \n",g_a5r_wait);
+#endif
+			break;
+		case PROC_ATM:
+			//Interface (Port)
+			buf_off+=sprintf(buf+buf_off,"[Interfaces]\n");
+			for(i=0;i<AMAZON_ATM_PORT_NUM;i++){
+				if (g_atm_dev.ports[i].enable==0){
+					buf_off+=sprintf(buf+buf_off,"\tport[%u] not in use\n",i);
+				}else{
+					buf_off+=sprintf(buf+buf_off,"\tport[%u]\n\t\tmax_conn=%u\n"
+									,i
+									,g_atm_dev.ports[i].max_conn
+									);
+					buf_off+=sprintf(buf+buf_off,"\t\ttx_max=%u\n\t\trem=%u\n\t\tcur=%u\n"
+									,g_atm_dev.ports[i].tx_max_cr
+									,g_atm_dev.ports[i].tx_rem_cr
+									,g_atm_dev.ports[i].tx_cur_cr
+									);
+				}
+
+			}
+			//Units Info
+			//AAL5
+			buf_off+=sprintf(buf+buf_off,"[AAL5]\n\tpad=%c(%x)\n\trx_mtu=%u\n\ttx_mtu=%u\n"
+    					,g_atm_dev.aal5.padding_byte
+    					,g_atm_dev.aal5.padding_byte
+    					,g_atm_dev.aal5.rx_max_sdu
+    					,g_atm_dev.aal5.tx_max_sdu
+    					);
+			//CBM
+			buf_off+=sprintf(buf+buf_off,
+				"[CBM]\n\tnrt_thr=%u\n\tclp0_thr=%u\n\tclp1_thr=%u\n\ttx_q_threshold=%u\n\trx_q_threshold=%u\n\toam_q_threshold=%u\n\tfree_cell_cnt=%u\n"
+    					,g_atm_dev.cbm.nrt_thr
+    					,g_atm_dev.cbm.clp0_thr
+    					,g_atm_dev.cbm.clp1_thr
+					,tx_q_threshold
+					,rx_q_threshold
+					,oam_q_threshold
+    					,g_atm_dev.cbm.free_cell_cnt
+    					);
+			//QSB
+			buf_off+=sprintf(buf+buf_off,"[QSB]\n\ttau=%u\n\ttstepc=%u\n\tsbl=%u\n"
+    					,g_atm_dev.qsb.tau
+    					,g_atm_dev.qsb.tstepc
+    					,g_atm_dev.qsb.sbl
+    					);
+			buf_off+=sprintf(buf+buf_off,"[Debugging]\n\taal5_need_copy=%u\n",g_atm_dev.aal5.cnt_cpy);
+			break;
+		case PROC_VCC:
+			for(i=CBM_DEFAULT_Q_OFFSET,j=0;i<g_atm_dev.cbm.max_q_off+CBM_DEFAULT_Q_OFFSET;i++){
+				if (g_atm_dev.queues[i].free!=1){
+					buf_off+=sprintf(buf+buf_off,"vcc[%u]\n\tvpi=%u vci=%u itf=%u qid=%u access_time=%u.%u\n"
+									,j++
+									,g_atm_dev.queues[i].vcc->vpi
+									,g_atm_dev.queues[i].vcc->vci
+									,g_atm_dev.queues[i].vcc->itf
+									,i
+									,(u32)g_atm_dev.queues[i+CBM_RX_OFFSET].access_time.tv_sec
+									,(u32)g_atm_dev.queues[i+CBM_RX_OFFSET].access_time.tv_usec
+									);
+					buf_off+=sprintf(buf+buf_off,"\tqos_tx class=%u max_pcr=%u pcr=%u min_pcr=%u scr=%u mbs=%u cdv=%u\n"
+									,g_atm_dev.queues[i].vcc->qos.txtp.traffic_class
+									,g_atm_dev.queues[i].vcc->qos.txtp.max_pcr
+									,g_atm_dev.queues[i].vcc->qos.txtp.pcr
+									,g_atm_dev.queues[i].vcc->qos.txtp.min_pcr
+									,g_atm_dev.queues[i].vcc->qos.txtp.scr
+									,g_atm_dev.queues[i].vcc->qos.txtp.mbs
+									,g_atm_dev.queues[i].vcc->qos.txtp.cdv
+									);
+					buf_off+=sprintf(buf+buf_off,"\tqos_rx class=%u max_pcr=%u pcr=%u min_pcr=%u scr=%u mbs=%u cdv=%u\n"
+									,g_atm_dev.queues[i].vcc->qos.rxtp.traffic_class
+									,g_atm_dev.queues[i].vcc->qos.rxtp.max_pcr
+									,g_atm_dev.queues[i].vcc->qos.rxtp.pcr
+									,g_atm_dev.queues[i].vcc->qos.rxtp.min_pcr
+									,g_atm_dev.queues[i].vcc->qos.rxtp.scr
+									,g_atm_dev.queues[i].vcc->qos.rxtp.mbs
+									,g_atm_dev.queues[i].vcc->qos.rxtp.cdv
+									);
+					__amazon_atm_vcc_mib((i+CBM_RX_OFFSET),&mib_vcc);
+					buf_off+=sprintf(buf+buf_off,"\tCRC error=%u\n", mib_vcc.aal5VccCrcErrors);
+					buf_off+=sprintf(buf+buf_off,"\toversized packet=%u\n", mib_vcc.aal5VccOverSizedSDUs);
+#ifdef 	AMAZON_ATM_DEBUG
+					if ( valid_qid(i+CBM_RX_OFFSET)){
+					buf_off+=sprintf(buf+buf_off,"\tdownstream statics\n" );
+					buf_off+=sprintf(buf+buf_off,"\t\tpackets=%u\n",g_atm_dev.queues[i+CBM_RX_OFFSET].qs[QS_PKT]);
+					buf_off+=sprintf(buf+buf_off,"\t\terr_packets=%u\n",g_atm_dev.queues[i+CBM_RX_OFFSET].qs[QS_ERR] );
+					buf_off+=sprintf(buf+buf_off,"\t\tsw_dropped=%u\n",g_atm_dev.queues[i+CBM_RX_OFFSET].qs[QS_SW_DROP] );
+					}
+
+					buf_off+=sprintf(buf+buf_off,"\tupstream statics\n" );
+					buf_off+=sprintf(buf+buf_off,"\t\tpackets=%u\n",g_atm_dev.queues[i].qs[QS_PKT]);
+					buf_off+=sprintf(buf+buf_off,"\t\terr_packets=%u\n",g_atm_dev.queues[i].qs[QS_ERR] );
+					buf_off+=sprintf(buf+buf_off,"\t\thw_dropped=%u\n",g_atm_dev.queues[i].qs[QS_HW_DROP] );
+					buf_off+=sprintf(buf+buf_off,"\t\tsw_dropped=%u\n",g_atm_dev.queues[i].qs[QS_SW_DROP] );
+
+#endif					
+	
+				}
+
+			}
+			break;
+		default:
+			break;
+    	}
+	if(buf_off>0)	*eof = 1;
+	return buf_off;
+}
+
+#ifdef AMAZON_TPE_AAL5_RECOVERY
+extern int (*tpe_reset)(void);
+extern int (*tpe_start)(void);
+extern int (*tpe_inject)(void);
+/*	Brief:		Reset TPE hardware
+ *	Description
+ *		This is a wordaround for AAL5 bug. It tries to reset TPE.
+ *	 take care of software
+ *	 setup all previous connection
+ */
+int amazon_tpe_reset(void)
+{
+	struct atm_vcc * vcc;	
+	int err=0;
+	int i;
+	u8 * qd_addr;
+	u32 reg_l, reg_h;
+	unsigned int a_cfg_value=0;
+	unsigned int a_cfg_old_value=0;
+	atm_aal5_ifEntry_t mib_aal5;
+	atm_cell_ifEntry_t mib_cell;
+	
+	//make sure all cells transmitting out first
+	//Segmentation done
+	amazon_atm_aal5_mib(&mib_aal5);
+	reg_l = g_atm_dev.mib_counter.tx_cnt_l;
+	reg_h = g_atm_dev.mib_counter.tx_cnt_h;
+	while(1){
+		mdelay(10);
+		amazon_atm_aal5_mib(&mib_aal5);
+		if( (reg_l == g_atm_dev.mib_counter.tx_cnt_l) && (reg_h == g_atm_dev.mib_counter.tx_cnt_h) ){
+			break;
+		}
+		AMAZON_TPE_DMSG("AAL5 Segmentation still in progress!\n");
+		reg_l = g_atm_dev.mib_counter.tx_cnt_l;
+		reg_h = g_atm_dev.mib_counter.tx_cnt_h;
+	}
+	//QSB done
+	qd_addr = (u8 *) KSEG1ADDR((unsigned long)g_atm_dev.cbm.qd_addr);
+	for (i=1;i<15;i++){
+		while ( (err=readl(qd_addr+i*CBM_QD_SIZE+0x8)&0xffff) !=0  ){
+			mdelay(20);
+			AMAZON_TPE_DMSG("queue %u not empty (%u)\n",i,err);
+		}
+	}
+	//insurance for interfaces between Aware and CARB
+	mdelay(100);
+	amazon_atm_cell_mib(&mib_cell,0);
+	amazon_atm_cell_mib(&mib_cell,1);
+	amazon_atm_aal5_mib(&mib_aal5);
+	
+	mb();
+	while ( (AMAZON_READ_REGISTER_L(AR_CELLRDY_BC0) != 0 ) || (AMAZON_READ_REGISTER_L(AR_CELLRDY_BC0) != 0 )  ){
+		AMAZON_TPE_EMSG("\nwaiting for AWARE");
+		AMAZON_TPE_EMSG(" BC0 %u ", AMAZON_READ_REGISTER_L(AR_CELLRDY_BC0));
+		AMAZON_TPE_EMSG(" BC1 %u ", AMAZON_READ_REGISTER_L(AR_CELLRDY_BC1));
+		AMAZON_TPE_EMSG("\n");
+		mdelay(1);
+	}
+	// disable AAI module
+	meiDebugRead(A_CFG_ADDR,&a_cfg_value,1);	
+	a_cfg_old_value=a_cfg_value;
+	a_cfg_value &= (~(0x2800));
+	meiDebugWrite(A_CFG_ADDR,&a_cfg_value,1);	
+	//clear buffer
+	a_cfg_value = 0x1;
+	meiDebugWrite(AR_CB0_STATUS_ADDR,&a_cfg_value,1);	
+	meiDebugWrite(AR_CB1_STATUS_ADDR,&a_cfg_value,1);	
+
+	if ( atm_init_hard(&g_atm_dev) != 0){
+		return -EIO;
+	}
+	sema_init(&(g_atm_dev.swie.in_sem), 1);
+	//SWIE lock
+	clear_bit(SWIE_LOCK, &(g_atm_dev.swie.lock));
+	//SWIE wait queue
+	init_waitqueue_head(&(g_atm_dev.swie.sleep));
+	
+	for (i=CBM_DEFAULT_Q_OFFSET;i<AMAZON_ATM_MAX_QUEUE_NUM/2;i++) {
+		vcc = g_atm_dev.queues[i].vcc;
+		if (vcc != NULL){
+			set_qsb(vcc, &vcc->qos, i);
+			set_qd(vcc, i);
+			mb();
+			err=set_htu(vcc,i);
+			if (err){
+				AMAZON_TPE_EMSG("set htu entry fails %u\n",err);
+			}
+		}
+	}
+	meiDebugWrite(A_CFG_ADDR,&a_cfg_old_value,1);	
+#if 0
+	//reset DFE
+	*(AMAZON_RST_REQ) = (* AMAZON_RST_REQ) | (AMAZON_RST_REQ_DFE);
+	mb();
+	*(AMAZON_RST_REQ) = (* AMAZON_RST_REQ) &  (~AMAZON_RST_REQ_DFE);
+	mb();
+#endif
+	
+	return 0;
+}
+
+/* Brief:	Send a ATM EoP packet to save DMA channel
+ */
+int amazon_tpe_inject_debug_cell(void)
+{
+	//Send a ATM cell to save DMA channel
+	u8 qid;
+	unsigned char atm_cell[48];
+	qid = 0x11;
+	AMAZON_TPE_DMSG("qid = %d\n",qid);
+	memset(atm_cell,0,48);
+	atm_cell[3] = 0x2;
+	if ( amazon_atm_swin(qid,atm_cell)) {
+		AMAZON_TPE_EMSG("cannot insert EoP cell\n");
+		return -1;
+	}
+	return 0;
+}
+
+/* Brief:	start HTU (TPE)
+ */
+
+int amazon_tpe_start(void)
+{
+	AMAZON_WRITE_REGISTER_L(HTU_CFG_START ,HTU_CFG_ADDR);
+	wmb();
+	return 0;
+}
+#endif //AMAZON_TPE_AAL5_RECOVERY
+
+#ifdef AMAZON_CHECK_LINK
+extern int (*adsl_link_notify)(int);
+/*	Brief:	notify link status of ADSL link
+ *	Parameters:	0	link down
+ *			1	link up
+ *	Returns:	0 	OK
+ *	Details:	called by MEI driver 
+ *	should update status and inform upper layer
+ */
+int amazon_tpe_link_notify(int status)
+{
+	adsl_link_status = status;
+	AMAZON_TPE_DMSG("link status %s\n",(status==1)?"Up":"Down");
+	if (status == 0){
+		//wait until no cells in upstream queues
+		set_current_state(TASK_INTERRUPTIBLE);
+		schedule_timeout(2*HZ);
+	}
+	return 0;
+}
+#endif //ifdef AMAZON_CHECK_LINK
+
+/*
+ *	Brief: 		Initialize ATM module
+ *
+ *  	Return Value:	ENOMEM		- No memory available
+ *			EBUSY		- Cannot register atm device
+ *			ERESTARTSYS 	- Process interrupted by other signal
+ *			0		- OK, module initialized
+ *
+ *	Description:
+ *	This function registers an atm device for all UTOPIA devices.
+ *	It also allocates memory for the private device data structures
+ */
+int __init amazon_atm_net_init(void)
+{
+	int i;
+	int err=0;
+	amazon_atm_dev_t *dev = NULL;
+	
+	if ((dev=amazon_atm_create()) != NULL){
+		for(i=0;i<AMAZON_ATM_PORT_NUM;i++){
+			if (!dev->ports[i].enable){
+				amazon_atm_devs[i] = NULL;
+				continue;
+			}
+			amazon_atm_devs[i] =atm_dev_register("amazon_atm",&amazon_atm_ops,-1,0UL);
+			if (amazon_atm_devs[i] == NULL){
+				AMAZON_TPE_EMSG("atm_dev_register fails\n");
+				err = -EIO;
+				goto amazon_atm_net_init_exit;
+			}else{
+				AMAZON_TPE_DMSG("registering device %u\n",i);
+				amazon_atm_devs[i]->ci_range.vpi_bits = 8;
+				amazon_atm_devs[i]->ci_range.vci_bits = 16;
+				amazon_atm_devs[i]->link_rate = dev->ports[i].tx_max_cr;
+				amazon_atm_devs[i]->dev_data = (void *) i;
+			}
+		}
+			
+	}else{
+		err = -ENOMEM;
+		AMAZON_TPE_EMSG("cannot init atm device\n");
+		goto amazon_atm_net_init_exit;
+	}
+#ifdef AMAZON_TPE_AAL5_RECOVERY	
+	tpe_reset = & amazon_tpe_reset;
+	tpe_start = & amazon_tpe_start;
+	tpe_inject = & amazon_tpe_inject_debug_cell;
+#endif //AMAZON_TPE_AAL5_RECOVERY
+#ifdef AMAZON_CHECK_LINK
+	adsl_link_notify=amazon_tpe_link_notify;
+#endif //AMAZON_CHECK_LINK
+amazon_atm_net_init_exit:
+	return err;
+}
+
+void __exit amazon_atm_net_cleanup(void)
+{
+	int i;
+	amazon_atm_cleanup();
+	for(i=0;i<AMAZON_ATM_PORT_NUM;i++){
+		if (amazon_atm_devs[i] != NULL){
+			AMAZON_TPE_DMSG("unregister dev %u\n",i);
+			atm_dev_deregister(amazon_atm_devs[i]);
+		}
+	}
+	return;
+}
+EXPORT_SYMBOL(get_oam_time_stamp);
+
+MODULE_LICENSE ("GPL"); 
+MODULE_AUTHOR("Infineon IFAP DC COM peng.liu@infineon.com");
+MODULE_DESCRIPTION("AMAZON ATM driver");
+
+module_init(amazon_atm_net_init);
+module_exit(amazon_atm_net_cleanup);
+ 
+
+
+
+