path: root/drivers/net/usb/smsc95xx.c

 /***************************************************************************
 *
 * Copyright (C) 2007-2008 SMSC
 *
 * 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.
 *
 *****************************************************************************/

#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/usb.h>
#include <linux/crc32.h>
#include <linux/usb/usbnet.h>
#include "smsc95xx.h"

#define SMSC_CHIPNAME			"smsc95xx"
#define SMSC_DRIVER_VERSION		"1.0.3"
#define HS_USB_PKT_SIZE			(512)
#define FS_USB_PKT_SIZE			(64)
#define DEFAULT_HS_BURST_CAP_SIZE	(16 * 1024 + 5 * HS_USB_PKT_SIZE)
#define DEFAULT_FS_BURST_CAP_SIZE	(6 * 1024 + 33 * FS_USB_PKT_SIZE)
#define DEFAULT_BULK_IN_DELAY		(0x00002000)
#define MAX_SINGLE_PACKET_SIZE		(2048)
#define LAN95XX_EEPROM_MAGIC		(0x9500)
#define EEPROM_MAC_OFFSET		(0x01)
#define DEFAULT_RX_CSUM_ENABLE		(true)
#define SMSC95XX_INTERNAL_PHY_ID	(1)
#define SMSC95XX_TX_OVERHEAD		(8)
#define FLOW_CTRL_TX			(1)
#define FLOW_CTRL_RX			(2)

struct smsc95xx_priv {
	u32 mac_cr;
	spinlock_t mac_cr_lock;
	bool use_rx_csum;
};

struct usb_context {
	struct usb_ctrlrequest req;
	struct completion notify;
	struct usbnet *dev;
};

int turbo_mode = true;
module_param(turbo_mode, bool, 0644);
MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");

static int smsc95xx_read_reg(struct usbnet *dev, u32 index, u32 *data)
{
	u32 *buf = kmalloc(4, GFP_KERNEL);
	int ret;

	BUG_ON(!dev);

	if (!buf)
		return -ENOMEM;

	ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
		USB_VENDOR_REQUEST_READ_REGISTER,
		USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
		00, index, buf, 4, USB_CTRL_GET_TIMEOUT);

	if (unlikely(ret < 0))
		devwarn(dev, "Failed to read register index 0x%08x", index);

	le32_to_cpus(buf);
	*data = *buf;
	kfree(buf);

	return ret;
}

static int smsc95xx_write_reg(struct usbnet *dev, u32 index, u32 data)
{
	u32 *buf = kmalloc(4, GFP_KERNEL);
	int ret;

	BUG_ON(!dev);

	if (!buf)
		return -ENOMEM;

	*buf = data;
	cpu_to_le32s(buf);

	ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
		USB_VENDOR_REQUEST_WRITE_REGISTER,
		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
		00, index, buf, 4, USB_CTRL_SET_TIMEOUT);

	if (unlikely(ret < 0))
		devwarn(dev, "Failed to write register index 0x%08x", index);

	kfree(buf);

	return ret;
}

/* Loop until the read is completed with timeout
 * called with phy_mutex held */
static int smsc95xx_phy_wait_not_busy(struct usbnet *dev)
{
	unsigned long start_time