[PATCH] USB: Eagle and ADI 930 usb adsl modem driver

A driver for USB ADSL modems based on the ADI eagle chipset using the
usb_atm infrastructure.

The managing part was taken from bsd ueagle driver, other parts were
written from scratch.

The driver uses the in-kernel firmware loader :
- to load  a first usb firmware when the modem is in pre-firmware state
- to load the dsp firmware that are swapped in host memory.
- to load CMV (configuration and management variables) when the modem
boot. (We can't use options or sysfs for this as there many possible
values. See
https://mail.gna.org/public/eagleusb-dev/2005-04/msg00031.html for a
description of some)
- to load fpga code for 930 chipset.

The device had 4 endpoints :
* 2 for data (use by usbatm). The incoming
endpoint could be iso or bulk. The modem seems buggy and produce lot's
of atm errors when using it in bulk mode for speed > 3Mbps, so iso
endpoint is need for speed > 3Mbps. At the moment iso endpoint need a
patched usbatm library and for this reason is not included in this patch.

* One bulk endpoint for uploading dsp firmware

* One irq endpoint that notices the driver
    - if we need to upload a page of the dsp firmware
    - an ack for read or write CMV and the value (for the read case).

If order to make the driver cleaner, we design synchronous
(read|write)_cmv :
-send a synchronous control message to the modem
-wait for an ack or a timeout
-return the value if needed.

In order to run these synchronous usb messages we need a kernel thread.

The driver has been tested  with sagem fast 800 modems with different
eagle chipset revision and with ADI 930 since April 2005.

Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 1827 insertions, 0 deletions

diff --git a/drivers/usb/atm/Kconfig b/drivers/usb/atm/Kconfig
index f429862e0974..550ddfa71a43 100644
--- a/drivers/usb/atm/Kconfig
+++ b/drivers/usb/atm/Kconfig
@@ -44,6 +44,19 @@ config USB_CXACRU
 	  To compile this driver as a module, choose M here: the
 	  module will be called cxacru.
 
+config USB_UEAGLEATM
+	tristate "ADI 930 and eagle USB DSL modem"
+	depends on USB_ATM
+	select FW_LOADER
+	help
+	  Say Y here if you have an ADSL USB modem based on the ADI 930
+	  or eagle chipset. In order to use your modem you will need to
+	  install firmwares and CMV (Command Management Variables); see
+	  <https://gna.org/projects/ueagleatm/> for details.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ueagle-atm.
+
 config USB_XUSBATM
 	tristate "Other USB DSL modem support"
 	depends on USB_ATM
diff --git a/drivers/usb/atm/Makefile b/drivers/usb/atm/Makefile
index 85099718c683..4c4a776ab1cd 100644
--- a/drivers/usb/atm/Makefile
+++ b/drivers/usb/atm/Makefile
@@ -4,6 +4,7 @@
 
 obj-$(CONFIG_USB_CXACRU)	+= cxacru.o
 obj-$(CONFIG_USB_SPEEDTOUCH)	+= speedtch.o
+obj-$(CONFIG_USB_UEAGLEATM)	+= ueagle-atm.o
 obj-$(CONFIG_USB_ATM)		+= usbatm.o
 obj-$(CONFIG_USB_XUSBATM)	+= xusbatm.o
 
diff --git a/drivers/usb/atm/ueagle-atm.c b/drivers/usb/atm/ueagle-atm.c
new file mode 100644
index 000000000000..3e2475c666ab
--- /dev/null
+++ b/drivers/usb/atm/ueagle-atm.c
@@ -0,0 +1,1813 @@
+/*-
+ * Copyright (c) 2003, 2004
+ *	Damien Bergamini <damien.bergamini@free.fr>. All rights reserved.
+ *
+ * Copyright (c) 2005 Matthieu Castet <castet.matthieu@free.fr>
+ *
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice unmodified, this list of conditions, and the following
+ *    disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * GPL license :
+ * 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.
+ *
+ *
+ * HISTORY : some part of the code was base on ueagle 1.3 BSD driver,
+ * Damien Bergamini agree to put his code under a DUAL GPL/BSD license.
+ *
+ * The rest of the code was was rewritten from scratch.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/crc32.h>
+#include <linux/usb.h>
+#include <linux/firmware.h>
+#include <linux/ctype.h>
+#include <linux/kthread.h>
+#include <linux/version.h>
+#include <asm/unaligned.h>
+
+#include "usbatm.h"
+
+#define EAGLEUSBVERSION "ueagle 1.1"
+
+
+/*
+ * Debug macros
+ */
+#define uea_dbg(usb_dev, format, args...)	\
+	do { \
+		if (debug >= 1) \
+			dev_dbg(&(usb_dev)->dev, \
+				"[ueagle-atm dbg] %s: " format, \
+					__FUNCTION__, ##args); \
+       } while (0)
+
+#define uea_vdbg(usb_dev, format, args...)	\
+	do { \
+		if (debug >= 2) \
+			dev_dbg(&(usb_dev)->dev, \
+				"[ueagle-atm vdbg]  " format, ##args); \
+       } while (0)
+
+#define uea_enters(usb_dev) \
+	uea_vdbg(usb_dev, "entering %s\n", __FUNCTION__)
+
+#define uea_leaves(usb_dev) \
+	uea_vdbg(usb_dev, "leaving  %s\n", __FUNCTION__)
+
+#define uea_err(usb_dev, format,args...) \
+	dev_err(&(usb_dev)->dev ,"[UEAGLE-ATM] " format , ##args)
+
+#define uea_warn(usb_dev, format,args...) \
+	dev_warn(&(usb_dev)->dev ,"[Ueagle-atm] " format, ##args)
+
+#define uea_info(usb_dev, format,args...) \
+	dev_info(&(usb_dev)->dev ,"[ueagle-atm] " format, ##args)
+
+struct uea_cmvs {
+	u32 address;
+	u16 offset;
+	u32 data;
+} __attribute__ ((packed));
+
+struct uea_softc {
+	struct usb_device *usb_dev;
+	struct usbatm_data *usbatm;
+
+	int modem_index;
+	unsigned int driver_info;
+
+	int booting;
+	int reset;
+
+	wait_queue_head_t sync_q;
+
+	struct task_struct *kthread;
+	u32 data;
+	wait_queue_head_t cmv_ack_wait;
+	int cmv_ack;
+
+	struct work_struct task;
+	u16 pageno;
+	u16 ovl;
+
+	const struct firmware *dsp_firm;
+	struct urb *urb_int;
+
+	u8 cmv_function;
+	u16 cmv_idx;
+	u32 cmv_address;
+	u16 cmv_offset;
+
+	/* keep in sync with eaglectl */
+	struct uea_stats {
+		struct {
+			u32 state;
+			u32 flags;
+			u32 mflags;
+			u32 vidcpe;
+			u32 vidco;
+			u32 dsrate;
+			u32 usrate;
+			u32 dsunc;
+			u32 usunc;
+			u32 dscorr;
+			u32 uscorr;
+			u32 txflow;
+			u32 rxflow;
+			u32 usattenuation;
+			u32 dsattenuation;
+			u32 dsmargin;
+			u32 usmargin;
+			u32 firmid;
+		} phy;
+	} stats;
+};
+
+/*
+ * Elsa IDs
+ */
+#define ELSA_VID		0x05CC
+#define ELSA_PID_PSTFIRM	0x3350
+#define ELSA_PID_PREFIRM	0x3351
+
+/*
+ * Sagem USB IDs
+ */
+#define EAGLE_VID		0x1110
+#define EAGLE_I_PID_PREFIRM	0x9010	/* Eagle I */
+#define EAGLE_I_PID_PSTFIRM	0x900F	/* Eagle I */
+
+#define EAGLE_IIC_PID_PREFIRM	0x9024	/* Eagle IIC */
+#define EAGLE_IIC_PID_PSTFIRM	0x9023	/* Eagle IIC */
+
+#define EAGLE_II_PID_PREFIRM	0x9022	/* Eagle II */
+#define EAGLE_II_PID_PSTFIRM	0x9021	/* Eagle II */
+
+/*
+ *  Eagle III Pid
+ */
+#define EAGLE_III_PID_PREFIRM	0x9032	/* Eagle III */
+#define EAGLE_III_PID_PSTFIRM	0x9031	/* Eagle III */
+
+/*
+ * USR USB IDs
+ */
+#define USR_VID			0x0BAF
+#define MILLER_A_PID_PREFIRM	0x00F2
+#define MILLER_A_PID_PSTFIRM	0x00F1
+#define MILLER_B_PID_PREFIRM	0x00FA
+#define MILLER_B_PID_PSTFIRM	0x00F9
+#define HEINEKEN_A_PID_PREFIRM	0x00F6
+#define HEINEKEN_A_PID_PSTFIRM	0x00F5
+#define HEINEKEN_B_PID_PREFIRM	0x00F8
+#define HEINEKEN_B_PID_PSTFIRM	0x00F7
+
+#define PREFIRM 0
+#define PSTFIRM (1<<7)
+enum {
+	ADI930 = 0,
+	EAGLE_I,
+	EAGLE_II,
+	EAGLE_III
+};
+
+/* macros for both struct usb_device_id and struct uea_softc */
+#define UEA_IS_PREFIRM(x) \
+	(!((x)->driver_info & PSTFIRM))
+#define UEA_CHIP_VERSION(x) \
+	((x)->driver_info & 0xf)
+
+#define IS_ISDN(sc) \
+	(le16_to_cpu(sc->usb_dev->descriptor.bcdDevice) & 0x80)
+
+#define INS_TO_USBDEV(ins) ins->usb_dev
+
+#define GET_STATUS(data) \
+	((data >> 8) & 0xf)
+#define IS_OPERATIONAL(sc) \
+	(GET_STATUS(sc->stats.phy.state) == 2)
+
+/*
+ * Set of macros to handle unaligned data in the firmware blob.
+ * The FW_GET_BYTE() macro is provided only for consistency.
+ */
+
+#define FW_GET_BYTE(p)	*((__u8 *) (p))
+#define FW_GET_WORD(p)	le16_to_cpu(get_unaligned((__le16 *) (p)))
+#define FW_GET_LONG(p)	le32_to_cpu(get_unaligned((__le32 *) (p)))
+
+#define FW_DIR "ueagle-atm/"
+#define NB_MODEM 4
+
+#define BULK_TIMEOUT 300
+#define CTRL_TIMEOUT 1000
+
+#define ACK_TIMEOUT msecs_to_jiffies(1500)
+
+#define UEA_INTR_IFACE_NO 	0
+#define UEA_US_IFACE_NO		1
+#define UEA_DS_IFACE_NO		2
+
+#define FASTEST_ISO_INTF	8
+
+#define UEA_BULK_DATA_PIPE	0x02
+#define UEA_IDMA_PIPE		0x04
+#define UEA_INTR_PIPE		0x04
+#define UEA_ISO_DATA_PIPE	0x08
+
+#define UEA_SET_BLOCK    	0x0001
+#define UEA_SET_MODE     	0x0003
+#define UEA_SET_2183_DATA	0x0004
+#define UEA_SET_TIMEOUT		0x0011
+
+#define UEA_LOOPBACK_OFF	0x0002
+#define UEA_LOOPBACK_ON		0x0003
+#define UEA_BOOT_IDMA		0x0006
+#define UEA_START_RESET		0x0007
+#define UEA_END_RESET		0x0008
+
+#define UEA_SWAP_MAILBOX	(0x3fcd | 0x4000)
+#define UEA_MPTX_START		(0x3fce | 0x4000)
+#define UEA_MPTX_MAILBOX	(0x3fd6 | 0x4000)
+#define UEA_MPRX_MAILBOX	(0x3fdf | 0x4000)
+
+/* structure describing a block within a DSP page */
+struct block_info {
+	__le16 wHdr;
+#define UEA_BIHDR 0xabcd
+	__le16 wAddress;
+	__le16 wSize;
+	__le16 wOvlOffset;
+	__le16 wOvl;		/* overlay */
+	__le16 wLast;
+} __attribute__ ((packed));
+#define BLOCK_INFO_SIZE 12
+
+/* structure representing a CMV (Configuration and Management Variable) */
+struct cmv {
+	__le16 wPreamble;
+#define PREAMBLE 0x535c
+	__u8 bDirection;
+#define MODEMTOHOST 0x01
+#define HOSTTOMODEM 0x10
+	__u8 bFunction;
+#define FUNCTION_TYPE(f)    ((f) >> 4)
+#define MEMACCESS	0x1
+#define ADSLDIRECTIVE	0x7
+
+#define FUNCTION_SUBTYPE(f) ((f) & 0x0f)
+/* for MEMACCESS */
+#define REQUESTREAD	0x0
+#define REQUESTWRITE	0x1
+#define REPLYREAD	0x2
+#define REPLYWRITE	0x3
+/* for ADSLDIRECTIVE */
+#define KERNELREADY	0x0
+#define MODEMREADY	0x1
+
+#define MAKEFUNCTION(t, s) (((t) & 0xf) << 4 | ((s) & 0xf))
+	__le16 wIndex;
+	__le32 dwSymbolicAddress;
+#define MAKESA(a, b, c, d)						\
+	(((c) & 0xff) << 24 |						\
+	 ((d) & 0xff) << 16 |						\
+	 ((a) & 0xff) << 8  |						\
+	 ((b) & 0xff))
+
+#define SA_CNTL MAKESA('C', 'N', 'T', 'L')
+#define SA_DIAG MAKESA('D', 'I', 'A', 'G')
+#define SA_INFO MAKESA('I', 'N', 'F', 'O')
+#define SA_OPTN MAKESA('O', 'P', 'T', 'N')
+#define SA_RATE MAKESA('R', 'A', 'T', 'E')
+#define SA_STAT MAKESA('S', 'T', 'A', 'T')
+	__le16 wOffsetAddress;
+	__le32 dwData;
+} __attribute__ ((packed));
+#define CMV_SIZE 16
+
+/* structure representing swap information */
+struct swap_info {
+	__u8 bSwapPageNo;
+	__u8 bOvl;		/* overlay */
+} __attribute__ ((packed));
+
+/* structure representing interrupt data */
+struct intr_pkt {
+	__u8 bType;
+	__u8 bNotification;
+	__le16 wValue;
+	__le16 wIndex;
+	__le16 wLength;
+	__le16 wInterrupt;
+#define INT_LOADSWAPPAGE 0x0001
+#define INT_INCOMINGCMV  0x0002
+	union {
+		struct {
+			struct swap_info swapinfo;
+			__le16 wDataSize;
+		} __attribute__ ((packed)) s1;
+
+		struct {
+			struct cmv cmv;
+			__le16 wDataSize;
+		} __attribute__ ((packed)) s2;
+	} __attribute__ ((packed)) u;
+#define bSwapPageNo	u.s1.swapinfo.bSwapPageNo
+#define bOvl		u.s1.swapinfo.bOvl
+} __attribute__ ((packed));
+#define INTR_PKT_SIZE 28
+
+static struct usb_driver uea_driver;
+static DECLARE_MUTEX(uea_semaphore);
+static const char *chip_name[] = {"ADI930", "Eagle I", "Eagle II", "Eagle III"};
+
+static int modem_index;
+static unsigned int debug;
+static int sync_wait[NB_MODEM];
+static char *cmv_file[NB_MODEM];
+
+module_param(debug, uint, 0644);
+MODULE_PARM_DESC(debug, "module debug level (0=off,1=on,2=verbose)");
+module_param_array(sync_wait, bool, NULL, 0644);
+MODULE_PARM_DESC(sync_wait, "wait the synchronisation before starting ATM");
+module_param_array(cmv_file, charp, NULL, 0644);
+MODULE_PARM_DESC(cmv_file,
+		"file name with configuration and management variables");
+
+#define UPDATE_ATM_STAT(type, val) \
+	do { \
+		if (sc->usbatm->atm_dev) \
+			sc->usbatm->atm_dev->type = val; \
+	} while (0)
+
+/* Firmware loading */
+#define LOAD_INTERNAL     0xA0
+#define F8051_USBCS       0x7f92
+
+/**
+ * uea_send_modem_cmd - Send a command for pre-firmware devices.
+ */
+static int uea_send_modem_cmd(struct usb_device *usb,
+		u16 addr, u16 size, u8 * buff)
+{
+	int ret = -ENOMEM;
+	u8 *xfer_buff;
+
+	xfer_buff = kmalloc(size, GFP_KERNEL);
+	if (xfer_buff) {
+		memcpy(xfer_buff, buff, size);
+		ret = usb_control_msg(usb,
+				      usb_sndctrlpipe(usb, 0),
+				      LOAD_INTERNAL,
+				      USB_DIR_OUT | USB_TYPE_VENDOR |
+				      USB_RECIP_DEVICE, addr, 0, xfer_buff,
+				      size, CTRL_TIMEOUT);
+		kfree(xfer_buff);
+	}
+
+	if (ret < 0)
+		return ret;
+
+	return (ret == size) ? 0 : -EIO;
+}
+
+static void uea_upload_pre_firmware(const struct firmware *fw_entry, void *context)
+{
+	struct usb_device *usb = context;
+	u8 *pfw, value;
+	u32 crc = 0;
+	int ret, size;
+
+	uea_enters(usb);
+	if (!fw_entry) {
+		uea_err(usb, "firmware is not available\n");
+		goto err;
+	}
+
+	pfw = fw_entry->data;
+	size = fw_entry->size;
+
+	crc = FW_GET_LONG(pfw);
+	pfw += 4;
+	size -= 4;
+	if (crc32_be(0, pfw, size) != crc) {
+		uea_err(usb, "firmware is corrupted\n");
+		goto err;
+	}
+
+	/*
+	 * Start to upload formware : send reset
+	 */
+	value = 1;
+	ret = uea_send_modem_cmd(usb, F8051_USBCS, sizeof(value), &value);
+
+	if (ret < 0) {
+		uea_err(usb, "modem reset failed with error %d\n", ret);
+		goto err;
+	}
+
+	while (size > 0) {
+		u8 len = FW_GET_BYTE(pfw);
+		u16 add = FW_GET_WORD(pfw + 1);
+		ret = uea_send_modem_cmd(usb, add, len, pfw + 3);
+		if (ret < 0) {
+			uea_err(usb, "uploading firmware data failed "
+					"with error %d\n", ret);
+			goto err;
+		}
+		pfw += len + 3;
+		size -= len + 3;
+	}
+
+	/*
+	 * Tell the modem we finish : de-assert reset
+	 */
+	value = 0;
+	ret = uea_send_modem_cmd(usb, F8051_USBCS, 1, &value);
+	if (ret < 0)
+		uea_err(usb, "modem de-assert failed with error %d\n", ret);
+	else
+		uea_info(usb, "firmware uploaded\n");
+
+err:
+	uea_leaves(usb);
+}
+
+/**
+ * uea_load_firmware - Load usb firmware for pre-firmware devices.
+ */
+static int uea_load_firmware(struct usb_device *usb, unsigned int ver)
+{
+	int ret;
+	char *fw_name = FW_DIR "eagle.fw";
+
+	uea_enters(usb);
+	uea_info(usb, "pre-firmware device, uploading firmware\n");
+
+	switch (ver) {
+	case ADI930:
+		fw_name = FW_DIR "adi930.fw";
+		break;
+	case EAGLE_I:
+		fw_name = FW_DIR "eagleI.fw";
+		break;
+	case EAGLE_II:
+		fw_name = FW_DIR "eagleII.fw";
+		break;
+	case EAGLE_III:
+		fw_name = FW_DIR "eagleIII.fw";
+		break;
+	}
+
+	ret = request_firmware_nowait(THIS_MODULE, 1, fw_name, &usb->dev, usb, uea_upload_pre_firmware);
+	if (ret)
+		uea_err(usb, "firmware %s is not available\n", fw_name);
+	else
+		uea_info(usb, "loading firmware %s\n", fw_name);
+
+	uea_leaves(usb);
+	return ret;
+}
+
+/* modem management : dsp firmware, send/read CMV, monitoring statistic
+ */
+
+/*
+ * Make sure that the DSP code provided is safe to use.
+ */
+static int check_dsp(u8 *dsp, unsigned int len)
+{
+	u8 pagecount, blockcount;
+	u16 blocksize;
+	u32 pageoffset;
+	unsigned int i, j, p, pp;
+
+	/* enough space for pagecount? */
+	if (len < 1)
+		return 1;
+
+	pagecount = FW_GET_BYTE(dsp);
+	p = 1;
+
+	/* enough space for page offsets? */
+	if (p + 4 * pagecount > len)
+		return 1;
+
+	for (i = 0; i < pagecount; i++) {
+
+		pageoffset = FW_GET_LONG(dsp + p);
+		p += 4;
+
+		if (pageoffset == 0)
+			continue;
+
+		/* enough space for blockcount? */
+		if (pageoffset >= len)
+			return 1;
+
+		pp = pageoffset;
+		blockcount = FW_GET_BYTE(dsp + pp);
+		pp += 1;
+
+		for (j = 0; j < blockcount; j++) {
+
+			/* enough space for block header? */
+			if (pp + 4 > len)
+				return 1;
+
+			pp += 2;	/* skip blockaddr */
+			blocksize = FW_GET_WORD(dsp + pp);
+			pp += 2;
+
+			/* enough space for block data? */
+			if (pp + blocksize > len)
+				return 1;
+
+			pp += blocksize;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * send data to the idma pipe
+ * */
+static int uea_idma_write(struct uea_softc *sc, void *data, u32 size)
+{
+	int ret = -ENOMEM;
+	u8 *xfer_buff;
+	int bytes_read;
+
+	xfer_buff = kmalloc(size, GFP_KERNEL);
+	if (!xfer_buff) {
+		uea_err(INS_TO_USBDEV(sc), "can't allocate xfer_buff\n");
+		return ret;
+	}
+
+	memcpy(xfer_buff, data, size);
+
+	ret = usb_bulk_msg(sc->usb_dev,
+			 usb_sndbulkpipe(sc->usb_dev, UEA_IDMA_PIPE),
+			 xfer_buff, size, &bytes_read, BULK_TIMEOUT);
+
+	kfree(xfer_buff);
+	if (ret < 0)
+		return ret;
+	if (size != bytes_read) {
+		uea_err(INS_TO_USBDEV(sc), "size != bytes_read %d %d\n", size,
+		       bytes_read);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int request_dsp(struct uea_softc *sc)
+{
+	int ret;
+	char *dsp_name;
+
+	if (UEA_CHIP_VERSION(sc) == ADI930) {
+		if (IS_ISDN(sc))
+			dsp_name = FW_DIR "DSP9i.bin";
+		else
+			dsp_name = FW_DIR "DSP9p.bin";
+	} else {
+		if (IS_ISDN(sc))
+			dsp_name = FW_DIR "DSPei.bin";
+		else
+			dsp_name = FW_DIR "DSPep.bin";
+	}
+
+	ret = request_firmware(&sc->dsp_firm,
+				dsp_name, &sc->usb_dev->dev);
+	if (ret < 0) {
+		uea_err(INS_TO_USBDEV(sc),
+		       "requesting firmware %s failed with error %d\n",
+		       dsp_name, ret);
+		return ret;
+	}
+
+	if (check_dsp(sc->dsp_firm->data, sc->dsp_firm->size)) {
+		uea_err(INS_TO_USBDEV(sc), "firmware %s is corrupted\n",
+		       dsp_name);
+		release_firmware(sc->dsp_firm);
+		sc->dsp_firm = NULL;
+		return -EILSEQ;
+	}
+
+	return 0;
+}
+
+/*
+ * The uea_load_page() function must be called within a process context
+ */
+static void uea_load_page(void *xsc)
+{
+	struct uea_softc *sc = xsc;
+	u16 pageno = sc->pageno;
+	u16 ovl = sc->ovl;
+	struct block_info bi;
+
+	u8 *p;
+	u8 pagecount, blockcount;
+	u16 blockaddr, blocksize;
+	u32 pageoffset;
+	int i;
+
+	/* reload firmware when reboot start and it's loaded already */
+	if (ovl == 0 && pageno == 0 && sc->dsp_firm) {
+		release_firmware(sc->dsp_firm);
+		sc->dsp_firm = NULL;
+	}
+
+	if (sc->dsp_firm == NULL && request_dsp(sc) < 0)
+		return;
+
+	p = sc->dsp_firm->data;
+	pagecount = FW_GET_BYTE(p);
+	p += 1;
+
+	if (pageno >= pagecount)
+		goto bad1;
+
+	p += 4 * pageno;
+	pageoffset = FW_GET_LONG(p);
+
+	if (pageoffset == 0)
+		goto bad1;
+
+	p = sc->dsp_firm->data + pageoffset;
+	blockcount = FW_GET_BYTE(p);
+	p += 1;
+
+	uea_dbg(INS_TO_USBDEV(sc),
+	       "sending %u blocks for DSP page %u\n", blockcount, pageno);
+
+	bi.wHdr = cpu_to_le16(UEA_BIHDR);
+	bi.wOvl = cpu_to_le16(ovl);
+	bi.wOvlOffset = cpu_to_le16(ovl | 0x8000);
+
+	for (i = 0; i < blockcount; i++) {
+		blockaddr = FW_GET_WORD(p);
+		p += 2;
+
+		blocksize = FW_GET_WORD(p);
+		p += 2;
+
+		bi.wSize = cpu_to_le16(blocksize);
+		bi.wAddress = cpu_to_le16(blockaddr);
+		bi.wLast = cpu_to_le16((i == blockcount - 1) ? 1 : 0);
+
+		/* send block info through the IDMA pipe */
+		if (uea_idma_write(sc, &bi, BLOCK_INFO_SIZE))
+			goto bad2;
+
+		/* send block data through the IDMA pipe */
+		if (uea_idma_write(sc, p, blocksize))
+			goto bad2;
+
+		p += blocksize;
+	}
+
+	return;
+
+bad2:
+	uea_err(INS_TO_USBDEV(sc), "sending DSP block %u failed\n", i);
+	return;
+bad1:
+	uea_err(INS_TO_USBDEV(sc), "invalid DSP page %u requested\n",pageno);
+}
+
+static inline void wake_up_cmv_ack(struct uea_softc *sc)
+{
+	sc->cmv_ack = 1;
+	wake_up(&sc->cmv_ack_wait);
+}
+
+static inline int wait_cmv_ack(struct uea_softc *sc)
+{
+	int ret = wait_event_timeout(sc->cmv_ack_wait,
+						   sc->cmv_ack, ACK_TIMEOUT);
+	sc->cmv_ack = 0;
+
+	if (ret < 0)
+		return ret;
+
+	return (ret == 0) ? -ETIMEDOUT : 0;
+
+}
+
+#define UCDC_SEND_ENCAPSULATED_COMMAND 0x00
+
+static int uea_request(struct uea_softc *sc,
+		u16 value, u16 index, u16 size, void *data)
+{
+	u8 *xfer_buff;
+	int ret = -ENOMEM;
+
+	xfer_buff = kmalloc(size, GFP_KERNEL);
+	if (!xfer_buff) {
+		uea_err(INS_TO_USBDEV(sc), "can't allocate xfer_buff\n");
+		return ret;
+	}
+	memcpy(xfer_buff, data, size);
+
+	ret = usb_control_msg(sc->usb_dev, usb_sndctrlpipe(sc->usb_dev, 0),
+			      UCDC_SEND_ENCAPSULATED_COMMAND,
+			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+			      value, index, xfer_buff, size, CTRL_TIMEOUT);
+
+	kfree(xfer_buff);
+	if (ret < 0) {
+		uea_err(INS_TO_USBDEV(sc), "usb_control_msg error %d\n", ret);
+		return ret;
+	}
+
+	if (ret != size) {
+		uea_err(INS_TO_USBDEV(sc),
+		       "usb_control_msg send only %d bytes (instead of %d)\n",
+		       ret, size);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int uea_cmv(struct uea_softc *sc,
+		u8 function, u32 address, u16 offset, u32 data)
+{
+	struct cmv cmv;
+	int ret;
+
+	/* we send a request, but we expect a reply */
+	sc->cmv_function = function | 0x2;
+	sc->cmv_idx++;
+	sc->cmv_address = address;
+	sc->cmv_offset = offset;
+
+	cmv.wPreamble = cpu_to_le16(PREAMBLE);
+	cmv.bDirection = HOSTTOMODEM;
+	cmv.bFunction = function;
+	cmv.wIndex = cpu_to_le16(sc->cmv_idx);
+	put_unaligned(cpu_to_le32(address), &cmv.dwSymbolicAddress);
+	cmv.wOffsetAddress = cpu_to_le16(offset);
+	put_unaligned(cpu_to_le32(data >> 16 | data << 16), &cmv.dwData);
+
+	ret = uea_request(sc, UEA_SET_BLOCK, UEA_MPTX_START, CMV_SIZE, &cmv);
+	if (ret < 0)
+		return ret;
+	return wait_cmv_ack(sc);
+}
+
+static inline int uea_read_cmv(struct uea_softc *sc,
+		u32 address, u16 offset, u32 *data)
+{
+	int ret = uea_cmv(sc, MAKEFUNCTION(MEMACCESS, REQUESTREAD),
+			  address, offset, 0);
+	if (ret < 0)
+		uea_err(INS_TO_USBDEV(sc),
+			"reading cmv failed with error %d\n", ret);
+	else
+	 	*data = sc->data;
+
+	return ret;
+}
+
+static inline int uea_write_cmv(struct uea_softc *sc,
+		u32 address, u16 offset, u32 data)
+{
+	int ret = uea_cmv(sc, MAKEFUNCTION(MEMACCESS, REQUESTWRITE),
+			  address, offset, data);
+	if (ret < 0)
+		uea_err(INS_TO_USBDEV(sc),
+			"writing cmv failed with error %d\n", ret);
+
+	return ret;
+}
+
+/*
+ * Monitor the modem and update the stat
+ * return 0 if everything is ok
+ * return < 0 if an error occurs (-EAGAIN reboot needed)
+ */
+static int uea_stat(struct uea_softc *sc)
+{
+	u32 data;
+	int ret;
+
+	uea_enters(INS_TO_USBDEV(sc));
+	data = sc->stats.phy.state;
+
+	ret = uea_read_cmv(sc, SA_STAT, 0, &sc->stats.phy.state);
+	if (ret < 0)
+		return ret;
+
+	switch (GET_STATUS(sc->stats.phy.state)) {
+	case 0:		/* not yet synchronized */
+		uea_dbg(INS_TO_USBDEV(sc),
+		       "modem not yet synchronized\n");
+		return 0;
+
+	case 1:		/* initialization */
+		uea_dbg(INS_TO_USBDEV(sc), "modem initializing\n");
+		return 0;
+
+	case 2:		/* operational */
+		uea_vdbg(INS_TO_USBDEV(sc), "modem operational\n");
+		break;
+
+	case 3:		/* fail ... */
+		uea_info(INS_TO_USBDEV(sc), "modem synchronization failed\n");
+		return -EAGAIN;
+
+	case 4 ... 6:	/* test state */
+		uea_warn(INS_TO_USBDEV(sc),
+				"modem in test mode - not supported\n");
+		return -EAGAIN;
+
+	case 7:		/* fast-retain ... */
+		uea_info(INS_TO_USBDEV(sc), "modem in fast-retain mode\n");
+		return 0;
+	default:
+		uea_err(INS_TO_USBDEV(sc), "modem invalid SW mode %d\n",
+			GET_STATUS(sc->stats.phy.state));
+		return -EAGAIN;
+	}
+
+	if (GET_STATUS(data) != 2) {
+		uea_request(sc, UEA_SET_MODE, UEA_LOOPBACK_OFF, 0, NULL);
+		uea_info(INS_TO_USBDEV(sc), "modem operational\n");
+
+		/* release the dsp firmware as it is not needed until
+		 * the next failure
+		 */
+		if (sc->dsp_firm) {
+			release_firmware(sc->dsp_firm);
+			sc->dsp_firm = NULL;
+		}
+
+		ret = uea_read_cmv(sc, SA_INFO, 10, &sc->stats.phy.firmid);
+		if (ret < 0)
+			return ret;
+		uea_info(INS_TO_USBDEV(sc), "ATU-R firmware version : %x\n",
+				sc->stats.phy.firmid);
+	}
+
+	/* always update it as atm layer could not be init when we switch to
+	 * operational state
+	 */
+	UPDATE_ATM_STAT(signal, ATM_PHY_SIG_FOUND);
+
+	/* wake up processes waiting for synchronization */
+	wake_up(&sc->sync_q);
+
+	ret = uea_read_cmv(sc, SA_DIAG, 2, &sc->stats.phy.flags);
+	if (ret < 0)
+		return ret;
+	sc->stats.phy.mflags |= sc->stats.phy.flags;
+
+	/* in case of a flags ( for example delineation LOSS (& 0x10)),
+	 * we check the status again in order to detect the failure earlier
+	 */
+	if (sc->stats.phy.flags) {
+		uea_dbg(INS_TO_USBDEV(sc), "Stat flag = %d\n",
+		       sc->stats.phy.flags);
+		return 0;
+	}
+
+	ret = uea_read_cmv(sc, SA_RATE, 0, &data);
+	if (ret < 0)
+		return ret;
+
+	/* in bulk mode the modem have problem with high rate
+	 * changing internal timing could improve things, but the
+	 * value is misterious.
+	 * ADI930 don't support it (-EPIPE error).
+	 */
+	if (UEA_CHIP_VERSION(sc) != ADI930
+		    && sc->stats.phy.dsrate != (data >> 16) * 32) {
+		/* Original timming from ADI(used in windows driver)
+		 * 0x20ffff>>16 * 32 = 32 * 32 = 1Mbits
+		 */
+		u16 timeout = (data <= 0x20ffff) ? 0 : 1;
+		ret = uea_request(sc, UEA_SET_TIMEOUT, timeout, 0, NULL);
+		uea_info(INS_TO_USBDEV(sc),
+				"setting new timeout %d%s\n", timeout,
+				ret < 0?" failed":"");
+	}
+	sc->stats.phy.dsrate = (data >> 16) * 32;
+	sc->stats.phy.usrate = (data & 0xffff) * 32;
+	UPDATE_ATM_STAT(link_rate, sc->stats.phy.dsrate * 1000 / 424);
+
+	ret = uea_read_cmv(sc, SA_DIAG, 23, &data);
+	if (ret < 0)
+		return ret;
+	sc->stats.phy.dsattenuation = (data & 0xff) / 2;
+
+	ret = uea_read_cmv(sc, SA_DIAG, 47, &data);
+	if (ret < 0)
+		return ret;
+	sc->stats.phy.usattenuation = (data & 0xff) / 2;
+
+	ret = uea_read_cmv(sc, SA_DIAG, 25, &sc->stats.phy.dsmargin);
+	if (ret < 0)
+		return ret;
+
+	ret = uea_read_cmv(sc, SA_DIAG, 49, &sc->stats.phy.usmargin);
+	if (ret < 0)
+		return ret;
+
+	ret = uea_read_cmv(sc, SA_DIAG, 51, &sc->stats.phy.rxflow);
+	if (ret < 0)
+		return ret;
+
+	ret = uea_read_cmv(sc, SA_DIAG, 52, &sc->stats.phy.txflow);
+	if (ret < 0)
+		return ret;
+
+	ret = uea_read_cmv(sc, SA_DIAG, 54, &sc->stats.phy.dsunc);
+	if (ret < 0)
+		return ret;
+
+	/* only for atu-c */
+	ret = uea_read_cmv(sc, SA_DIAG, 58, &sc->stats.phy.usunc);
+	if (ret < 0)
+		return ret;
+
+	ret = uea_read_cmv(sc, SA_DIAG, 53, &sc->stats.phy.dscorr);
+	if (ret < 0)
+		return ret;
+
+	/* only for atu-c */
+	ret = uea_read_cmv(sc, SA_DIAG, 57, &sc->stats.phy.uscorr);
+	if (ret < 0)
+		return ret;
+
+	ret = uea_read_cmv(sc, SA_INFO, 8, &sc->stats.phy.vidco);
+	if (ret < 0)
+		return ret;
+
+	ret = uea_read_cmv(sc, SA_INFO, 13, &sc->stats.phy.vidcpe);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int request_cmvs(struct uea_softc *sc,
+		 struct uea_cmvs **cmvs, const struct firmware **fw)
+{
+	int ret, size;
+	u8 *data;
+	char *file;
+	static char cmv_name[256] = FW_DIR;
+
+	if (cmv_file[sc->modem_index] == NULL) {
+		if (UEA_CHIP_VERSION(sc) == ADI930)
+			file = (IS_ISDN(sc)) ? "CMV9i.bin" : "CMV9p.bin";
+		else
+			file = (IS_ISDN(sc)) ? "CMVei.bin" : "CMVep.bin";
+	} else
+		file = cmv_file[sc->modem_index];
+
+	strcpy(cmv_name, FW_DIR);
+	strlcat(cmv_name, file, sizeof(cmv_name));
+
+	ret = request_firmware(fw, cmv_name, &sc->usb_dev->dev);
+	if (ret < 0) {
+		uea_err(INS_TO_USBDEV(sc),
+		       "requesting firmware %s failed with error %d\n",
+		       cmv_name, ret);
+		return ret;
+	}
+
+	data = (u8 *) (*fw)->data;
+	size = *data * sizeof(struct uea_cmvs) + 1;
+	if (size != (*fw)->size) {
+		uea_err(INS_TO_USBDEV(sc), "firmware %s is corrupted\n",
+		       cmv_name);
+		release_firmware(*fw);
+		return -EILSEQ;
+	}
+
+	*cmvs = (struct uea_cmvs *)(data + 1);
+	return *data;
+}
+
+/* Start boot post firmware modem:
+ * - send reset commands through usb control pipe
+ * - start workqueue for DSP loading
+ * - send CMV options to modem
+ */
+
+static int uea_start_reset(struct uea_softc *sc)
+{
+	u16 zero = 0;	/* ;-) */
+	int i, len, ret;
+	struct uea_cmvs *cmvs;
+	const struct firmware *cmvs_fw;
+
+	uea_enters(INS_TO_USBDEV(sc));
+	uea_info(INS_TO_USBDEV(sc), "(re)booting started\n");
+
+	sc->booting = 1;
+	UPDATE_ATM_STAT(signal, ATM_PHY_SIG_LOST);
+
+	/* reset statistics */
+	memset(&sc->stats, 0, sizeof(struct uea_stats));
+
+	/* tell the modem that we want to boot in IDMA mode */
+	uea_request(sc, UEA_SET_MODE, UEA_LOOPBACK_ON, 0, NULL);
+	uea_request(sc, UEA_SET_MODE, UEA_BOOT_IDMA, 0, NULL);
+
+ 	/* enter reset mode */
+	uea_request(sc, UEA_SET_MODE, UEA_START_RESET, 0, NULL);
+
+	/* original driver use 200ms, but windows driver use 100ms */
+	msleep(100);
+
+	/* leave reset mode */
+	uea_request(sc, UEA_SET_MODE, UEA_END_RESET, 0, NULL);
+
+ 	/* clear tx and rx mailboxes */
+	uea_request(sc, UEA_SET_2183_DATA, UEA_MPTX_MAILBOX, 2, &zero);
+	uea_request(sc, UEA_SET_2183_DATA, UEA_MPRX_MAILBOX, 2, &zero);
+	uea_request(sc, UEA_SET_2183_DATA, UEA_SWAP_MAILBOX, 2, &zero);
+
+	msleep(1000);
+	sc->cmv_function = MAKEFUNCTION(ADSLDIRECTIVE, MODEMREADY);
+	sc->booting = 0;
+
+	/* start loading DSP */
+	sc->pageno = 0;
+	sc->ovl = 0;
+	schedule_work(&sc->task);
+
+	/* wait for modem ready CMV */
+	ret = wait_cmv_ack(sc);
+	if (ret < 0)
+		return ret;
+
+	/* Enter in R-IDLE (cmv) until instructed otherwise */
+	ret = uea_write_cmv(sc, SA_CNTL, 0, 1);
+	if (ret < 0)
+		return ret;
+
+	/* get options */
+ 	ret = len = request_cmvs(sc, &cmvs, &cmvs_fw);
+	if (ret < 0)
+		return ret;
+
+	/* send options */
+	for (i = 0; i < len; i++) {
+		ret = uea_write_cmv(sc, FW_GET_LONG(&cmvs[i].address),
+					FW_GET_WORD(&cmvs[i].offset),
+					FW_GET_LONG(&cmvs[i].data));
+		if (ret < 0)
+			goto out;
+	}
+	/* Enter in R-ACT-REQ */
+	ret = uea_write_cmv(sc, SA_CNTL, 0, 2);
+out:
+	release_firmware(cmvs_fw);
+	sc->reset = 0;
+	uea_leaves(INS_TO_USBDEV(sc));
+	return ret;
+}
+
+/*
+ * In case of an error wait 1s before rebooting the modem
+ * if the modem don't request reboot (-EAGAIN).
+ * Monitor the modem every 1s.
+ */
+
+static int uea_kthread(void *data)
+{
+	struct uea_softc *sc = data;
+	int ret = -EAGAIN;
+
+	uea_enters(INS_TO_USBDEV(sc));
+	while (!kthread_should_stop()) {
+		if (ret < 0 || sc->reset)
+			ret = uea_start_reset(sc);
+		if (!ret)
+			ret = uea_stat(sc);
+		if (ret != -EAGAIN)
+			msleep(1000);
+	}
+	uea_leaves(INS_TO_USBDEV(sc));
+	return ret;
+}
+
+/* Load second usb firmware for ADI930 chip */
+static int load_XILINX_firmware(struct uea_softc *sc)
+{
+	const struct firmware *fw_entry;
+	int ret, size, u, ln;
+	u8 *pfw, value;
+	char *fw_name = FW_DIR "930-fpga.bin";
+
+	uea_enters(INS_TO_USBDEV(sc));
+
+	ret = request_firmware(&fw_entry, fw_name, &sc->usb_dev->dev);
+	if (ret) {
+		uea_err(INS_TO_USBDEV(sc), "firmware %s is not available\n",
+		       fw_name);
+		goto err0;
+	}
+
+	pfw = fw_entry->data;
+	size = fw_entry->size;
+	if (size != 0x577B) {
+		uea_err(INS_TO_USBDEV(sc), "firmware %s is corrupted\n",
+		       fw_name);
+		ret = -EILSEQ;
+		goto err1;
+	}
+	for (u = 0; u < size; u += ln) {
+		ln = min(size - u, 64);
+		ret = uea_request(sc, 0xe, 0, ln, pfw + u);
+		if (ret < 0) {
+			uea_err(INS_TO_USBDEV(sc),
+			       "elsa download data failed (%d)\n", ret);
+			goto err1;
+		}
+	}
+
+	/* finish to send the fpga
+	 */
+	ret = uea_request(sc, 0xe, 1, 0, NULL);
+	if (ret < 0) {
+		uea_err(INS_TO_USBDEV(sc),
+				"elsa download data failed (%d)\n", ret);
+		goto err1;
+	}
+
+	/*
+	 * Tell the modem we finish : de-assert reset
+	 */
+	value = 0;
+	ret = uea_send_modem_cmd(sc->usb_dev, 0xe, 1, &value);
+	if (ret < 0)
+		uea_err(sc->usb_dev, "elsa de-assert failed with error %d\n", ret);
+
+
+err1:
+	release_firmware(fw_entry);
+err0:
+	uea_leaves(INS_TO_USBDEV(sc));
+	return ret;
+}
+
+static void uea_dispatch_cmv(struct uea_softc *sc, struct cmv* cmv)
+{
+	uea_enters(INS_TO_USBDEV(sc));
+	if (le16_to_cpu(cmv->wPreamble) != PREAMBLE)
+		goto bad1;
+
+	if (cmv->bDirection != MODEMTOHOST)
+		goto bad1;
+
+	/* FIXME : ADI930 reply wrong preambule (func = 2, sub = 2) to
+	 * the first MEMACESS cmv. Ignore it...
+	 */
+	if (cmv->bFunction != sc->cmv_function) {
+		if (UEA_CHIP_VERSION(sc) == ADI930
+				&& cmv->bFunction ==  MAKEFUNCTION(2, 2)) {
+			cmv->wIndex = cpu_to_le16(sc->cmv_idx);
+			put_unaligned(cpu_to_le32(sc->cmv_address), &cmv->dwSymbolicAddress);
+			cmv->wOffsetAddress = cpu_to_le16(sc->cmv_offset);
+		}
+		else
+			goto bad2;
+	}
+
+	if (cmv->bFunction == MAKEFUNCTION(ADSLDIRECTIVE, MODEMREADY)) {
+		wake_up_cmv_ack(sc);
+		return;
+	}
+
+	/* in case of MEMACCESS */
+	if (le16_to_cpu(cmv->wIndex) != sc->cmv_idx ||
+	    le32_to_cpu(get_unaligned(&cmv->dwSymbolicAddress)) !=
+	    sc->cmv_address
+	    || le16_to_cpu(cmv->wOffsetAddress) != sc->cmv_offset)
+		goto bad2;
+
+	sc->data = le32_to_cpu(get_unaligned(&cmv->dwData));
+	sc->data = sc->data << 16 | sc->data >> 16;
+
+	wake_up_cmv_ack(sc);
+	return;
+
+bad2:
+	uea_err(INS_TO_USBDEV(sc), "unexpected cmv received,"
+			"Function : %d, Subfunction : %d\n",
+			FUNCTION_TYPE(cmv->bFunction),
+			FUNCTION_SUBTYPE(cmv->bFunction));
+	return;
+
+bad1:
+	uea_err(INS_TO_USBDEV(sc), "invalid cmv received, "
+			"wPreamble %d, bDirection %d\n",
+			le16_to_cpu(cmv->wPreamble), cmv->bDirection);
+}
+
+/*
+ * interrupt handler
+ */
+static void uea_intr(struct urb *urb, struct pt_regs *regs)
+{
+	struct uea_softc *sc = (struct uea_softc *)urb->context;
+	struct intr_pkt *intr;
+	uea_enters(INS_TO_USBDEV(sc));
+
+	if (urb->status < 0) {
+		uea_err(INS_TO_USBDEV(sc), "uea_intr() failed with %d\n",
+		       urb->status);
+		return;
+	}
+
+	intr = (struct intr_pkt *) urb->transfer_buffer;
+
+	/* device-to-host interrupt */
+	if (intr->bType != 0x08 || sc->booting) {
+		uea_err(INS_TO_USBDEV(sc), "wrong intr\n");
+		// rebooting ?
+		// sc->reset = 1;
+		goto resubmit;
+	}
+
+	switch (le16_to_cpu(intr->wInterrupt)) {
+	case INT_LOADSWAPPAGE:
+		sc->pageno = intr->bSwapPageNo;
+		sc->ovl = intr->bOvl >> 4 | intr->bOvl << 4;
+		schedule_work(&sc->task);
+		break;
+
+	case INT_INCOMINGCMV:
+		uea_dispatch_cmv(sc, &intr->u.s2.cmv);
+		break;
+
+	default:
+		uea_err(INS_TO_USBDEV(sc), "unknown intr %u\n",
+		       le16_to_cpu(intr->wInterrupt));
+	}
+
+resubmit:
+	usb_submit_urb(sc->urb_int, GFP_ATOMIC);
+}
+
+/*
+ * Start the modem : init the data and start kernel thread
+ */
+static int uea_boot(struct uea_softc *sc)
+{
+	int ret;
+	struct intr_pkt *intr;
+
+	uea_enters(INS_TO_USBDEV(sc));
+
+	INIT_WORK(&sc->task, uea_load_page, sc);
+	init_waitqueue_head(&sc->sync_q);
+	init_waitqueue_head(&sc->cmv_ack_wait);
+
+	if (UEA_CHIP_VERSION(sc) == ADI930)
+		load_XILINX_firmware(sc);
+
+	intr = kmalloc(INTR_PKT_SIZE, GFP_KERNEL);
+	if (!intr) {
+		uea_err(INS_TO_USBDEV(sc),
+		       "cannot allocate interrupt package\n");
+		uea_leaves(INS_TO_USBDEV(sc));
+		return -ENOMEM;
+	}
+
+	sc->urb_int = usb_alloc_urb(0, GFP_KERNEL);
+	if (!sc->urb_int) {
+		uea_err(INS_TO_USBDEV(sc), "cannot allocate interrupt URB\n");
+		goto err;
+	}
+
+	usb_fill_int_urb(sc->urb_int, sc->usb_dev,
+			 usb_rcvintpipe(sc->usb_dev, UEA_INTR_PIPE),
+			 intr, INTR_PKT_SIZE, uea_intr, sc,
+			 sc->usb_dev->actconfig->interface[0]->altsetting[0].
+			 endpoint[0].desc.bInterval);
+
+	ret = usb_submit_urb(sc->urb_int, GFP_KERNEL);
+	if (ret < 0) {
+		uea_err(INS_TO_USBDEV(sc),
+		       "urb submition failed with error %d\n", ret);
+		goto err1;
+	}
+
+	sc->kthread = kthread_run(uea_kthread, sc, "ueagle-atm");
+	if (sc->kthread == ERR_PTR(-ENOMEM)) {
+		uea_err(INS_TO_USBDEV(sc), "failed to create thread\n");
+		goto err2;
+	}
+
+	uea_leaves(INS_TO_USBDEV(sc));
+	return 0;
+
+err2:
+	usb_kill_urb(sc->urb_int);
+err1:
+	kfree(intr);
+err:
+	usb_free_urb(sc->urb_int);
+	uea_leaves(INS_TO_USBDEV(sc));
+	return -ENOMEM;
+}
+
+/*
+ * Stop the modem : kill kernel thread and free data
+ */
+static void uea_stop(struct uea_softc *sc)
+{
+	int ret;
+	uea_enters(INS_TO_USBDEV(sc));
+	ret = kthread_stop(sc->kthread);
+	uea_info(INS_TO_USBDEV(sc), "kthread finish with status %d\n", ret);
+
+	/* stop any pending boot process */
+	flush_scheduled_work();
+
+	uea_request(sc, UEA_SET_MODE, UEA_LOOPBACK_ON, 0, NULL);
+
+	usb_kill_urb(sc->urb_int);
+	kfree(sc->urb_int->transfer_buffer);
+	usb_free_urb(sc->urb_int);
+
+	if (sc->dsp_firm)
+		release_firmware(sc->dsp_firm);
+	uea_leaves(INS_TO_USBDEV(sc));
+}
+
+/* syfs interface */
+static struct uea_softc *dev_to_uea(struct device *dev)
+{
+	struct usb_interface *intf;
+	struct usbatm_data *usbatm;
+
+	intf = to_usb_interface(dev);
+	if (!intf)
+		return NULL;
+
+	usbatm = usb_get_intfdata(intf);
+	if (!usbatm)
+		return NULL;
+
+	return usbatm->driver_data;
+}
+
+static ssize_t read_status(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	int ret = -ENODEV;
+	struct uea_softc *sc;
+
+	down(&uea_semaphore);
+	sc = dev_to_uea(dev);
+	if (!sc)
+		goto out;
+	ret = snprintf(buf, 10, "%08x\n", sc->stats.phy.state);
+out:
+	up(&uea_semaphore);
+	return ret;
+}
+
+static ssize_t reboot(struct device *dev, struct device_attribute *attr,
+		const char *buf, size_t count)
+{
+	int ret = -ENODEV;
+	struct uea_softc *sc;
+
+	down(&uea_semaphore);
+	sc = dev_to_uea(dev);
+	if (!sc)
+		goto out;
+	sc->reset = 1;
+	ret = count;
+out:
+	up(&uea_semaphore);
+	return ret;
+}
+
+static DEVICE_ATTR(stat_status, S_IWUGO | S_IRUGO, read_status, reboot);
+
+static ssize_t read_human_status(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	int ret = -ENODEV;
+	struct uea_softc *sc;
+
+	down(&uea_semaphore);
+	sc = dev_to_uea(dev);
+	if (!sc)
+		goto out;
+
+	switch (GET_STATUS(sc->stats.phy.state)) {
+	case 0:
+		ret = sprintf(buf, "Modem is booting\n");
+		break;
+	case 1:
+		ret = sprintf(buf, "Modem is initializing\n");
+		break;
+	case 2:
+		ret = sprintf(buf, "Modem is operational\n");
+		break;
+	default:
+		ret = sprintf(buf, "Modem synchronization failed\n");
+		break;
+	}
+out:
+	up(&uea_semaphore);
+	return ret;
+}
+
+static DEVICE_ATTR(stat_human_status, S_IWUGO | S_IRUGO, read_human_status, NULL);
+
+static ssize_t read_delin(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	int ret = -ENODEV;
+	struct uea_softc *sc;
+
+	down(&uea_semaphore);
+	sc = dev_to_uea(dev);
+	if (!sc)
+		goto out;
+
+	if (sc->stats.phy.flags & 0x0C00)
+		ret = sprintf(buf, "ERROR\n");
+	else if (sc->stats.phy.flags & 0x0030)
+		ret = sprintf(buf, "LOSS\n");
+	else
+		ret = sprintf(buf, "GOOD\n");
+out:
+	up(&uea_semaphore);
+	return ret;
+}
+
+static DEVICE_ATTR(stat_delin, S_IWUGO | S_IRUGO, read_delin, NULL);
+
+#define UEA_ATTR(name, reset) 					\
+								\
+static ssize_t read_##name(struct device *dev, 			\
+		struct device_attribute *attr, char *buf)	\
+{ 								\
+	int ret = -ENODEV; 					\
+	struct uea_softc *sc; 					\
+ 								\
+	down(&uea_semaphore); 					\
+	sc = dev_to_uea(dev);					\
+	if (!sc) 						\
+		goto out; 					\
+	ret = snprintf(buf, 10, "%08x\n", sc->stats.phy.name);	\
+	if (reset)						\
+		sc->stats.phy.name = 0;				\
+out: 								\
+	up(&uea_semaphore); 					\
+	return ret; 						\
+} 								\
+								\
+static DEVICE_ATTR(stat_##name, S_IRUGO, read_##name, NULL)
+
+UEA_ATTR(mflags, 1);
+UEA_ATTR(vidcpe, 0);
+UEA_ATTR(usrate, 0);
+UEA_ATTR(dsrate, 0);
+UEA_ATTR(usattenuation, 0);
+UEA_ATTR(dsattenuation, 0);
+UEA_ATTR(usmargin, 0);
+UEA_ATTR(dsmargin, 0);
+UEA_ATTR(txflow, 0);
+UEA_ATTR(rxflow, 0);
+UEA_ATTR(uscorr, 0);
+UEA_ATTR(dscorr, 0);
+UEA_ATTR(usunc, 0);
+UEA_ATTR(dsunc, 0);
+
+/* Retrieve the device End System Identifier (MAC) */
+
+#define htoi(x) (isdigit(x) ? x-'0' : toupper(x)-'A'+10)
+static int uea_getesi(struct uea_softc *sc, u_char * esi)
+{
+	unsigned char mac_str[2 * ETH_ALEN + 1];
+	int i;
+	if (usb_string
+	    (sc->usb_dev, sc->usb_dev->descriptor.iSerialNumber, mac_str,
+	     sizeof(mac_str)) != 2 * ETH_ALEN)
+		return 1;
+
+	for (i = 0; i < ETH_ALEN; i++)
+		esi[i] = htoi(mac_str[2 * i]) * 16 + htoi(mac_str[2 * i + 1]);
+
+	return 0;
+}
+
+/* ATM stuff */
+static int uea_atm_open(struct usbatm_data *usbatm, struct atm_dev *atm_dev)
+{
+	struct uea_softc *sc = usbatm->driver_data;
+
+	return uea_getesi(sc, atm_dev->esi);
+}
+
+static int uea_heavy(struct usbatm_data *usbatm, struct usb_interface *intf)
+{
+	struct uea_softc *sc = usbatm->driver_data;
+
+	wait_event(sc->sync_q, IS_OPERATIONAL(sc));
+
+	return 0;
+
+}
+
+static int claim_interface(struct usb_device *usb_dev,
+			   struct usbatm_data *usbatm, int ifnum)
+{
+	int ret;
+	struct usb_interface *intf = usb_ifnum_to_if(usb_dev, ifnum);
+
+	if (!intf) {
+		uea_err(usb_dev, "interface %d not found\n", ifnum);
+		return -ENODEV;
+	}
+
+	ret = usb_driver_claim_interface(&uea_driver, intf, usbatm);
+	if (ret != 0)
+		uea_err(usb_dev, "can't claim interface %d, error %d\n", ifnum,
+		       ret);
+	return ret;
+}
+
+static void create_fs_entries(struct uea_softc *sc, struct usb_interface *intf)
+{
+	/* sysfs interface */
+	device_create_file(&intf->dev, &dev_attr_stat_status);
+	device_create_file(&intf->dev, &dev_attr_stat_mflags);
+	device_create_file(&intf->dev, &dev_attr_stat_human_status);
+	device_create_file(&intf->dev, &dev_attr_stat_delin);
+	device_create_file(&intf->dev, &dev_attr_stat_vidcpe);
+	device_create_file(&intf->dev, &dev_attr_stat_usrate);
+	device_create_file(&intf->dev, &dev_attr_stat_dsrate);
+	device_create_file(&intf->dev, &dev_attr_stat_usattenuation);
+	device_create_file(&intf->dev, &dev_attr_stat_dsattenuation);
+	device_create_file(&intf->dev, &dev_attr_stat_usmargin);
+	device_create_file(&intf->dev, &dev_attr_stat_dsmargin);
+	device_create_file(&intf->dev, &dev_attr_stat_txflow);
+	device_create_file(&intf->dev, &dev_attr_stat_rxflow);
+	device_create_file(&intf->dev, &dev_attr_stat_uscorr);
+	device_create_file(&intf->dev, &dev_attr_stat_dscorr);
+	device_create_file(&intf->dev, &dev_attr_stat_usunc);
+	device_create_file(&intf->dev, &dev_attr_stat_dsunc);
+}
+
+static int uea_bind(struct usbatm_data *usbatm, struct usb_interface *intf,
+		   const struct usb_device_id *id, int *heavy)
+{
+	struct usb_device *usb = interface_to_usbdev(intf);
+	struct uea_softc *sc;
+	int ret, ifnum = intf->altsetting->desc.bInterfaceNumber;
+
+	uea_enters(usb);
+
+	/* interface 0 is for firmware/monitoring */
+	if (ifnum != UEA_INTR_IFACE_NO)
+		return -ENODEV;
+
+	*heavy = sync_wait[modem_index];
+
+	/* interface 1 is for outbound traffic */
+	ret = claim_interface(usb, usbatm, UEA_US_IFACE_NO);
+	if (ret < 0)
+		return ret;
+
+	/* ADI930 has only 2 interfaces and inbound traffic
+	 * is on interface 1
+	 */
+	if (UEA_CHIP_VERSION(id) != ADI930) {
+		/* interface 2 is for inbound traffic */
+		ret = claim_interface(usb, usbatm, UEA_DS_IFACE_NO);
+		if (ret < 0)
+			return ret;
+	}
+
+	sc = kzalloc(sizeof(struct uea_softc), GFP_KERNEL);
+	if (!sc) {
+		uea_err(INS_TO_USBDEV(sc), "uea_init: not enough memory !\n");
+		return -ENOMEM;
+	}
+
+	sc->usb_dev = usb;
+	usbatm->driver_data = sc;
+	sc->usbatm = usbatm;
+	sc->modem_index = (modem_index < NB_MODEM) ? modem_index++ : 0;
+	sc->driver_info = id->driver_info;
+
+	ret = uea_boot(sc);
+	if (ret < 0) {
+		kfree(sc);
+		return ret;
+	}
+
+	create_fs_entries(sc, intf);
+	return 0;
+}
+
+static void destroy_fs_entries(struct uea_softc *sc, struct usb_interface *intf)
+{
+	/* sysfs interface */
+	device_remove_file(&intf->dev, &dev_attr_stat_status);
+	device_remove_file(&intf->dev, &dev_attr_stat_mflags);
+	device_remove_file(&intf->dev, &dev_attr_stat_human_status);
+	device_remove_file(&intf->dev, &dev_attr_stat_delin);
+	device_remove_file(&intf->dev, &dev_attr_stat_vidcpe);
+	device_remove_file(&intf->dev, &dev_attr_stat_usrate);
+	device_remove_file(&intf->dev, &dev_attr_stat_dsrate);
+	device_remove_file(&intf->dev, &dev_attr_stat_usattenuation);
+	device_remove_file(&intf->dev, &dev_attr_stat_dsattenuation);
+	device_remove_file(&intf->dev, &dev_attr_stat_usmargin);
+	device_remove_file(&intf->dev, &dev_attr_stat_dsmargin);
+	device_remove_file(&intf->dev, &dev_attr_stat_txflow);
+	device_remove_file(&intf->dev, &dev_attr_stat_rxflow);
+	device_remove_file(&intf->dev, &dev_attr_stat_uscorr);
+	device_remove_file(&intf->dev, &dev_attr_stat_dscorr);
+	device_remove_file(&intf->dev, &dev_attr_stat_usunc);
+	device_remove_file(&intf->dev, &dev_attr_stat_dsunc);
+}
+
+static void uea_unbind(struct usbatm_data *usbatm, struct usb_interface *intf)
+{
+	struct uea_softc *sc = usbatm->driver_data;
+
+	destroy_fs_entries(sc, intf);
+	uea_stop(sc);
+	kfree(sc);
+}
+
+static struct usbatm_driver uea_usbatm_driver = {
+	.driver_name = "ueagle-atm",
+	.owner = THIS_MODULE,
+	.bind = uea_bind,
+	.atm_start = uea_atm_open,
+	.unbind = uea_unbind,
+	.heavy_init = uea_heavy,
+	.in = UEA_BULK_DATA_PIPE,
+	.out = UEA_BULK_DATA_PIPE,
+};
+
+static int uea_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+	struct usb_device *usb = interface_to_usbdev(intf);
+
+	uea_enters(usb);
+	uea_info(usb, "ADSL device founded vid (%#X) pid (%#X) : %s\n",
+	       le16_to_cpu(usb->descriptor.idVendor),
+	       le16_to_cpu(usb->descriptor.idProduct),
+	       chip_name[UEA_CHIP_VERSION(id)]);
+
+	usb_reset_device(usb);
+
+	if (UEA_IS_PREFIRM(id))
+		return uea_load_firmware(usb, UEA_CHIP_VERSION(id));
+
+	return usbatm_usb_probe(intf, id, &uea_usbatm_driver);
+}
+
+static void uea_disconnect(struct usb_interface *intf)
+{
+	struct usb_device *usb = interface_to_usbdev(intf);
+	int ifnum = intf->altsetting->desc.bInterfaceNumber;
+	uea_enters(usb);
+
+	/* ADI930 has 2 interfaces and eagle 3 interfaces.
+	 * Pre-firmware device has one interface
+	 */
+	if (usb->config->desc.bNumInterfaces != 1 && ifnum == 0) {
+		down(&uea_semaphore);
+		usbatm_usb_disconnect(intf);
+		up(&uea_semaphore);
+		uea_info(usb, "ADSL device removed\n");
+	}
+
+	uea_leaves(usb);
+}
+
+/*
+ * List of supported VID/PID
+ */
+static const struct usb_device_id uea_ids[] = {
+	{USB_DEVICE(ELSA_VID,	ELSA_PID_PREFIRM),	.driver_info = ADI930 | PREFIRM},
+	{USB_DEVICE(ELSA_VID,	ELSA_PID_PSTFIRM),	.driver_info = ADI930 | PSTFIRM},
+	{USB_DEVICE(EAGLE_VID,	EAGLE_I_PID_PREFIRM),	.driver_info = EAGLE_I | PREFIRM},
+	{USB_DEVICE(EAGLE_VID,	EAGLE_I_PID_PSTFIRM),	.driver_info = EAGLE_I | PSTFIRM},
+	{USB_DEVICE(EAGLE_VID,	EAGLE_II_PID_PREFIRM),	.driver_info = EAGLE_II | PREFIRM},
+	{USB_DEVICE(EAGLE_VID,	EAGLE_II_PID_PSTFIRM),	.driver_info = EAGLE_II | PSTFIRM},
+	{USB_DEVICE(EAGLE_VID,	EAGLE_IIC_PID_PREFIRM),	.driver_info = EAGLE_II | PREFIRM},
+	{USB_DEVICE(EAGLE_VID,	EAGLE_IIC_PID_PSTFIRM),	.driver_info = EAGLE_II | PSTFIRM},
+	{USB_DEVICE(EAGLE_VID,	EAGLE_III_PID_PREFIRM),	.driver_info = EAGLE_III | PREFIRM},
+	{USB_DEVICE(EAGLE_VID,	EAGLE_III_PID_PSTFIRM),	.driver_info = EAGLE_III | PSTFIRM},
+	{USB_DEVICE(USR_VID,	MILLER_A_PID_PREFIRM),	.driver_info = EAGLE_I | PREFIRM},
+	{USB_DEVICE(USR_VID,	MILLER_A_PID_PSTFIRM),	.driver_info = EAGLE_I | PSTFIRM},
+	{USB_DEVICE(USR_VID,	MILLER_B_PID_PREFIRM),	.driver_info = EAGLE_I | PREFIRM},
+	{USB_DEVICE(USR_VID,	MILLER_B_PID_PSTFIRM),	.driver_info = EAGLE_I | PSTFIRM},
+	{USB_DEVICE(USR_VID,	HEINEKEN_A_PID_PREFIRM),.driver_info = EAGLE_I | PREFIRM},
+	{USB_DEVICE(USR_VID,	HEINEKEN_A_PID_PSTFIRM),.driver_info = EAGLE_I | PSTFIRM},
+	{USB_DEVICE(USR_VID,	HEINEKEN_B_PID_PREFIRM),.driver_info = EAGLE_I | PREFIRM},
+	{USB_DEVICE(USR_VID,	HEINEKEN_B_PID_PSTFIRM),.driver_info = EAGLE_I | PSTFIRM},
+	{}
+};
+
+/*
+ * USB driver descriptor
+ */
+static struct usb_driver uea_driver = {
+	.owner = THIS_MODULE,
+	.name = "ueagle-atm",
+	.id_table = uea_ids,
+	.probe = uea_probe,
+	.disconnect = uea_disconnect,
+};
+
+MODULE_DEVICE_TABLE(usb, uea_ids);
+
+/**
+ * uea_init - Initialize the module.
+ *      Register to USB subsystem
+ */
+static int __init uea_init(void)
+{
+	printk(KERN_INFO "[ueagle-atm] driver " EAGLEUSBVERSION " loaded\n");
+
+	usb_register(&uea_driver);
+
+	return 0;
+}
+
+module_init(uea_init);
+
+/**
+ * uea_exit  -  Destroy module
+ *    Deregister with USB subsystem
+ */
+static void __exit uea_exit(void)
+{
+	/*
+	 * This calls automatically the uea_disconnect method if necessary:
+	 */
+	usb_deregister(&uea_driver);
+
+	printk(KERN_INFO "[ueagle-atm] driver unloaded\n");
+}
+
+module_exit(uea_exit);
+
+MODULE_AUTHOR("Damien Bergamini/Matthieu Castet/Stanislaw W. Gruszka");
+MODULE_DESCRIPTION("ADI 930/Eagle USB ADSL Modem driver");
+MODULE_LICENSE("Dual BSD/GPL");