648 lines
15 KiB
C
648 lines
15 KiB
C
/*
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* Davicom DM96xx USB 10/100Mbps ethernet devices
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*
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* Peter Korsgaard <jacmet@sunsite.dk>
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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//#define DEBUG
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <linux/stddef.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/mii.h>
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#include <linux/usb.h>
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#include <linux/crc32.h>
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#include <linux/usb/usbnet.h>
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#include <linux/slab.h>
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/* datasheet:
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http://ptm2.cc.utu.fi/ftp/network/cards/DM9601/From_NET/DM9601-DS-P01-930914.pdf
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*/
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/* control requests */
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#define DM_READ_REGS 0x00
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#define DM_WRITE_REGS 0x01
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#define DM_READ_MEMS 0x02
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#define DM_WRITE_REG 0x03
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#define DM_WRITE_MEMS 0x05
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#define DM_WRITE_MEM 0x07
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/* registers */
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#define DM_NET_CTRL 0x00
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#define DM_RX_CTRL 0x05
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#define DM_SHARED_CTRL 0x0b
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#define DM_SHARED_ADDR 0x0c
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#define DM_SHARED_DATA 0x0d /* low + high */
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#define DM_PHY_ADDR 0x10 /* 6 bytes */
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#define DM_MCAST_ADDR 0x16 /* 8 bytes */
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#define DM_GPR_CTRL 0x1e
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#define DM_GPR_DATA 0x1f
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#define DM_CHIP_ID 0x2c
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#define DM_MODE_CTRL 0x91 /* only on dm9620 */
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/* chip id values */
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#define ID_DM9601 0
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#define ID_DM9620 1
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#define DM_MAX_MCAST 64
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#define DM_MCAST_SIZE 8
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#define DM_EEPROM_LEN 256
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#define DM_TX_OVERHEAD 2 /* 2 byte header */
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#define DM_RX_OVERHEAD 7 /* 3 byte header + 4 byte crc tail */
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#define DM_TIMEOUT 1000
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static int dm_read(struct usbnet *dev, u8 reg, u16 length, void *data)
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{
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int err;
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err = usbnet_read_cmd(dev, DM_READ_REGS,
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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0, reg, data, length);
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if(err != length && err >= 0)
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err = -EINVAL;
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return err;
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}
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static int dm_read_reg(struct usbnet *dev, u8 reg, u8 *value)
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{
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return dm_read(dev, reg, 1, value);
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}
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static int dm_write(struct usbnet *dev, u8 reg, u16 length, void *data)
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{
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int err;
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err = usbnet_write_cmd(dev, DM_WRITE_REGS,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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0, reg, data, length);
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if (err >= 0 && err < length)
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err = -EINVAL;
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return err;
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}
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static int dm_write_reg(struct usbnet *dev, u8 reg, u8 value)
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{
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return usbnet_write_cmd(dev, DM_WRITE_REG,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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value, reg, NULL, 0);
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}
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static void dm_write_async(struct usbnet *dev, u8 reg, u16 length, void *data)
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{
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usbnet_write_cmd_async(dev, DM_WRITE_REGS,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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0, reg, data, length);
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}
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static void dm_write_reg_async(struct usbnet *dev, u8 reg, u8 value)
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{
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usbnet_write_cmd_async(dev, DM_WRITE_REG,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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value, reg, NULL, 0);
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}
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static int dm_read_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 *value)
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{
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int ret, i;
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mutex_lock(&dev->phy_mutex);
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dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
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dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0xc : 0x4);
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for (i = 0; i < DM_TIMEOUT; i++) {
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u8 tmp = 0;
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udelay(1);
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ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
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if (ret < 0)
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goto out;
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/* ready */
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if ((tmp & 1) == 0)
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break;
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}
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if (i == DM_TIMEOUT) {
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netdev_err(dev->net, "%s read timed out!\n", phy ? "phy" : "eeprom");
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ret = -EIO;
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goto out;
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}
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dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
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ret = dm_read(dev, DM_SHARED_DATA, 2, value);
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netdev_dbg(dev->net, "read shared %d 0x%02x returned 0x%04x, %d\n",
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phy, reg, *value, ret);
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out:
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mutex_unlock(&dev->phy_mutex);
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return ret;
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}
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static int dm_write_shared_word(struct usbnet *dev, int phy, u8 reg, __le16 value)
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{
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int ret, i;
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mutex_lock(&dev->phy_mutex);
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ret = dm_write(dev, DM_SHARED_DATA, 2, &value);
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if (ret < 0)
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goto out;
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dm_write_reg(dev, DM_SHARED_ADDR, phy ? (reg | 0x40) : reg);
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dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1a : 0x12);
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for (i = 0; i < DM_TIMEOUT; i++) {
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u8 tmp = 0;
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udelay(1);
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ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
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if (ret < 0)
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goto out;
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/* ready */
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if ((tmp & 1) == 0)
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break;
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}
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if (i == DM_TIMEOUT) {
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netdev_err(dev->net, "%s write timed out!\n", phy ? "phy" : "eeprom");
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ret = -EIO;
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goto out;
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}
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dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
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out:
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mutex_unlock(&dev->phy_mutex);
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return ret;
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}
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static int dm_read_eeprom_word(struct usbnet *dev, u8 offset, void *value)
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{
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return dm_read_shared_word(dev, 0, offset, value);
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}
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static int dm9601_get_eeprom_len(struct net_device *dev)
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{
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return DM_EEPROM_LEN;
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}
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static int dm9601_get_eeprom(struct net_device *net,
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struct ethtool_eeprom *eeprom, u8 * data)
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{
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struct usbnet *dev = netdev_priv(net);
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__le16 *ebuf = (__le16 *) data;
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int i;
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/* access is 16bit */
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if ((eeprom->offset % 2) || (eeprom->len % 2))
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return -EINVAL;
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for (i = 0; i < eeprom->len / 2; i++) {
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if (dm_read_eeprom_word(dev, eeprom->offset / 2 + i,
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&ebuf[i]) < 0)
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return -EINVAL;
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}
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return 0;
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}
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static int dm9601_mdio_read(struct net_device *netdev, int phy_id, int loc)
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{
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struct usbnet *dev = netdev_priv(netdev);
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__le16 res;
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if (phy_id) {
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netdev_dbg(dev->net, "Only internal phy supported\n");
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return 0;
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}
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dm_read_shared_word(dev, 1, loc, &res);
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netdev_dbg(dev->net,
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"dm9601_mdio_read() phy_id=0x%02x, loc=0x%02x, returns=0x%04x\n",
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phy_id, loc, le16_to_cpu(res));
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return le16_to_cpu(res);
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}
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static void dm9601_mdio_write(struct net_device *netdev, int phy_id, int loc,
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int val)
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{
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struct usbnet *dev = netdev_priv(netdev);
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__le16 res = cpu_to_le16(val);
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if (phy_id) {
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netdev_dbg(dev->net, "Only internal phy supported\n");
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return;
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}
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netdev_dbg(dev->net, "dm9601_mdio_write() phy_id=0x%02x, loc=0x%02x, val=0x%04x\n",
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phy_id, loc, val);
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dm_write_shared_word(dev, 1, loc, res);
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}
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static void dm9601_get_drvinfo(struct net_device *net,
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struct ethtool_drvinfo *info)
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{
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/* Inherit standard device info */
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usbnet_get_drvinfo(net, info);
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}
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static u32 dm9601_get_link(struct net_device *net)
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{
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struct usbnet *dev = netdev_priv(net);
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return mii_link_ok(&dev->mii);
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}
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static int dm9601_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
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{
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struct usbnet *dev = netdev_priv(net);
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return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
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}
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static const struct ethtool_ops dm9601_ethtool_ops = {
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.get_drvinfo = dm9601_get_drvinfo,
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.get_link = dm9601_get_link,
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.get_msglevel = usbnet_get_msglevel,
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.set_msglevel = usbnet_set_msglevel,
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.get_eeprom_len = dm9601_get_eeprom_len,
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.get_eeprom = dm9601_get_eeprom,
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.nway_reset = usbnet_nway_reset,
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.get_link_ksettings = usbnet_get_link_ksettings,
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.set_link_ksettings = usbnet_set_link_ksettings,
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};
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static void dm9601_set_multicast(struct net_device *net)
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{
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struct usbnet *dev = netdev_priv(net);
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/* We use the 20 byte dev->data for our 8 byte filter buffer
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* to avoid allocating memory that is tricky to free later */
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u8 *hashes = (u8 *) & dev->data;
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u8 rx_ctl = 0x31;
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memset(hashes, 0x00, DM_MCAST_SIZE);
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hashes[DM_MCAST_SIZE - 1] |= 0x80; /* broadcast address */
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if (net->flags & IFF_PROMISC) {
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rx_ctl |= 0x02;
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} else if (net->flags & IFF_ALLMULTI ||
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netdev_mc_count(net) > DM_MAX_MCAST) {
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rx_ctl |= 0x08;
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} else if (!netdev_mc_empty(net)) {
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struct netdev_hw_addr *ha;
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netdev_for_each_mc_addr(ha, net) {
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u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26;
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hashes[crc >> 3] |= 1 << (crc & 0x7);
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}
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}
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dm_write_async(dev, DM_MCAST_ADDR, DM_MCAST_SIZE, hashes);
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dm_write_reg_async(dev, DM_RX_CTRL, rx_ctl);
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}
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static void __dm9601_set_mac_address(struct usbnet *dev)
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{
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dm_write_async(dev, DM_PHY_ADDR, ETH_ALEN, dev->net->dev_addr);
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}
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static int dm9601_set_mac_address(struct net_device *net, void *p)
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{
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struct sockaddr *addr = p;
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struct usbnet *dev = netdev_priv(net);
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if (!is_valid_ether_addr(addr->sa_data)) {
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dev_err(&net->dev, "not setting invalid mac address %pM\n",
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addr->sa_data);
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return -EINVAL;
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}
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memcpy(net->dev_addr, addr->sa_data, net->addr_len);
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__dm9601_set_mac_address(dev);
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return 0;
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}
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static const struct net_device_ops dm9601_netdev_ops = {
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.ndo_open = usbnet_open,
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.ndo_stop = usbnet_stop,
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.ndo_start_xmit = usbnet_start_xmit,
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.ndo_tx_timeout = usbnet_tx_timeout,
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.ndo_change_mtu = usbnet_change_mtu,
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.ndo_get_stats64 = usbnet_get_stats64,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_do_ioctl = dm9601_ioctl,
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.ndo_set_rx_mode = dm9601_set_multicast,
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.ndo_set_mac_address = dm9601_set_mac_address,
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};
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static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf)
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{
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int ret;
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u8 mac[ETH_ALEN], id;
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ret = usbnet_get_endpoints(dev, intf);
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if (ret)
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goto out;
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dev->net->netdev_ops = &dm9601_netdev_ops;
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dev->net->ethtool_ops = &dm9601_ethtool_ops;
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dev->net->hard_header_len += DM_TX_OVERHEAD;
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dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
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/* dm9620/21a require room for 4 byte padding, even in dm9601
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* mode, so we need +1 to be able to receive full size
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* ethernet frames.
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*/
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dev->rx_urb_size = dev->net->mtu + ETH_HLEN + DM_RX_OVERHEAD + 1;
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dev->mii.dev = dev->net;
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dev->mii.mdio_read = dm9601_mdio_read;
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dev->mii.mdio_write = dm9601_mdio_write;
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dev->mii.phy_id_mask = 0x1f;
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dev->mii.reg_num_mask = 0x1f;
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/* reset */
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dm_write_reg(dev, DM_NET_CTRL, 1);
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udelay(20);
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/* read MAC */
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if (dm_read(dev, DM_PHY_ADDR, ETH_ALEN, mac) < 0) {
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printk(KERN_ERR "Error reading MAC address\n");
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ret = -ENODEV;
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goto out;
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}
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/*
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* Overwrite the auto-generated address only with good ones.
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*/
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if (is_valid_ether_addr(mac))
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memcpy(dev->net->dev_addr, mac, ETH_ALEN);
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else {
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printk(KERN_WARNING
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"dm9601: No valid MAC address in EEPROM, using %pM\n",
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dev->net->dev_addr);
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__dm9601_set_mac_address(dev);
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}
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if (dm_read_reg(dev, DM_CHIP_ID, &id) < 0) {
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netdev_err(dev->net, "Error reading chip ID\n");
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ret = -ENODEV;
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goto out;
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}
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/* put dm9620 devices in dm9601 mode */
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if (id == ID_DM9620) {
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u8 mode;
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if (dm_read_reg(dev, DM_MODE_CTRL, &mode) < 0) {
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netdev_err(dev->net, "Error reading MODE_CTRL\n");
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ret = -ENODEV;
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goto out;
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}
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dm_write_reg(dev, DM_MODE_CTRL, mode & 0x7f);
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}
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/* power up phy */
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dm_write_reg(dev, DM_GPR_CTRL, 1);
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dm_write_reg(dev, DM_GPR_DATA, 0);
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/* receive broadcast packets */
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dm9601_set_multicast(dev->net);
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dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
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dm9601_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
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ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP);
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mii_nway_restart(&dev->mii);
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out:
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return ret;
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}
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static int dm9601_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
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{
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u8 status;
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int len;
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/* format:
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b1: rx status
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b2: packet length (incl crc) low
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b3: packet length (incl crc) high
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b4..n-4: packet data
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bn-3..bn: ethernet crc
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*/
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if (unlikely(skb->len < DM_RX_OVERHEAD)) {
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dev_err(&dev->udev->dev, "unexpected tiny rx frame\n");
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return 0;
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}
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status = skb->data[0];
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len = (skb->data[1] | (skb->data[2] << 8)) - 4;
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if (unlikely(status & 0xbf)) {
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if (status & 0x01) dev->net->stats.rx_fifo_errors++;
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if (status & 0x02) dev->net->stats.rx_crc_errors++;
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if (status & 0x04) dev->net->stats.rx_frame_errors++;
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if (status & 0x20) dev->net->stats.rx_missed_errors++;
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if (status & 0x90) dev->net->stats.rx_length_errors++;
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return 0;
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}
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skb_pull(skb, 3);
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skb_trim(skb, len);
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return 1;
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}
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static struct sk_buff *dm9601_tx_fixup(struct usbnet *dev, struct sk_buff *skb,
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gfp_t flags)
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{
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int len, pad;
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/* format:
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b1: packet length low
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b2: packet length high
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b3..n: packet data
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*/
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len = skb->len + DM_TX_OVERHEAD;
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/* workaround for dm962x errata with tx fifo getting out of
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* sync if a USB bulk transfer retry happens right after a
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* packet with odd / maxpacket length by adding up to 3 bytes
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* padding.
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*/
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while ((len & 1) || !(len % dev->maxpacket))
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len++;
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len -= DM_TX_OVERHEAD; /* hw header doesn't count as part of length */
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pad = len - skb->len;
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if (skb_headroom(skb) < DM_TX_OVERHEAD || skb_tailroom(skb) < pad) {
|
|
struct sk_buff *skb2;
|
|
|
|
skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, pad, flags);
|
|
dev_kfree_skb_any(skb);
|
|
skb = skb2;
|
|
if (!skb)
|
|
return NULL;
|
|
}
|
|
|
|
__skb_push(skb, DM_TX_OVERHEAD);
|
|
|
|
if (pad) {
|
|
memset(skb->data + skb->len, 0, pad);
|
|
__skb_put(skb, pad);
|
|
}
|
|
|
|
skb->data[0] = len;
|
|
skb->data[1] = len >> 8;
|
|
|
|
return skb;
|
|
}
|
|
|
|
static void dm9601_status(struct usbnet *dev, struct urb *urb)
|
|
{
|
|
int link;
|
|
u8 *buf;
|
|
|
|
/* format:
|
|
b0: net status
|
|
b1: tx status 1
|
|
b2: tx status 2
|
|
b3: rx status
|
|
b4: rx overflow
|
|
b5: rx count
|
|
b6: tx count
|
|
b7: gpr
|
|
*/
|
|
|
|
if (urb->actual_length < 8)
|
|
return;
|
|
|
|
buf = urb->transfer_buffer;
|
|
|
|
link = !!(buf[0] & 0x40);
|
|
if (netif_carrier_ok(dev->net) != link) {
|
|
usbnet_link_change(dev, link, 1);
|
|
netdev_dbg(dev->net, "Link Status is: %d\n", link);
|
|
}
|
|
}
|
|
|
|
static int dm9601_link_reset(struct usbnet *dev)
|
|
{
|
|
struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
|
|
|
|
mii_check_media(&dev->mii, 1, 1);
|
|
mii_ethtool_gset(&dev->mii, &ecmd);
|
|
|
|
netdev_dbg(dev->net, "link_reset() speed: %u duplex: %d\n",
|
|
ethtool_cmd_speed(&ecmd), ecmd.duplex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct driver_info dm9601_info = {
|
|
.description = "Davicom DM96xx USB 10/100 Ethernet",
|
|
.flags = FLAG_ETHER | FLAG_LINK_INTR,
|
|
.bind = dm9601_bind,
|
|
.rx_fixup = dm9601_rx_fixup,
|
|
.tx_fixup = dm9601_tx_fixup,
|
|
.status = dm9601_status,
|
|
.link_reset = dm9601_link_reset,
|
|
.reset = dm9601_link_reset,
|
|
};
|
|
|
|
static const struct usb_device_id products[] = {
|
|
{
|
|
USB_DEVICE(0x07aa, 0x9601), /* Corega FEther USB-TXC */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x9601), /* Davicom USB-100 */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x6688), /* ZT6688 USB NIC */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x0268), /* ShanTou ST268 USB NIC */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x8515), /* ADMtek ADM8515 USB NIC */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a47, 0x9601), /* Hirose USB-100 */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0fe6, 0x8101), /* DM9601 USB to Fast Ethernet Adapter */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0fe6, 0x9700), /* DM9601 USB to Fast Ethernet Adapter */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x9000), /* DM9000E */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x9620), /* DM9620 USB to Fast Ethernet Adapter */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x9621), /* DM9621A USB to Fast Ethernet Adapter */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x9622), /* DM9622 USB to Fast Ethernet Adapter */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x0269), /* DM962OA USB to Fast Ethernet Adapter */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{
|
|
USB_DEVICE(0x0a46, 0x1269), /* DM9621A USB to Fast Ethernet Adapter */
|
|
.driver_info = (unsigned long)&dm9601_info,
|
|
},
|
|
{}, // END
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(usb, products);
|
|
|
|
static struct usb_driver dm9601_driver = {
|
|
.name = "dm9601",
|
|
.id_table = products,
|
|
.probe = usbnet_probe,
|
|
.disconnect = usbnet_disconnect,
|
|
.suspend = usbnet_suspend,
|
|
.resume = usbnet_resume,
|
|
.disable_hub_initiated_lpm = 1,
|
|
};
|
|
|
|
module_usb_driver(dm9601_driver);
|
|
|
|
MODULE_AUTHOR("Peter Korsgaard <jacmet@sunsite.dk>");
|
|
MODULE_DESCRIPTION("Davicom DM96xx USB 10/100 ethernet devices");
|
|
MODULE_LICENSE("GPL");
|