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651 lines
15 KiB
651 lines
15 KiB
/* |
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* Davicom DM96xx USB 10/100Mbps ethernet devices |
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* |
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* Peter Korsgaard <[email protected]> |
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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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|
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//#define DEBUG |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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 = dev_get_tstats64, |
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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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|
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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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|
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/* receive broadcast packets */ |
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dm9601_set_multicast(dev->net); |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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if (skb_headroom(skb) < DM_TX_OVERHEAD || skb_tailroom(skb) < pad) { |
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struct sk_buff *skb2; |
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|
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skb2 = skb_copy_expand(skb, DM_TX_OVERHEAD, pad, flags); |
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dev_kfree_skb_any(skb); |
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skb = skb2; |
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if (!skb) |
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return NULL; |
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} |
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|
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__skb_push(skb, DM_TX_OVERHEAD); |
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|
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if (pad) { |
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memset(skb->data + skb->len, 0, pad); |
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__skb_put(skb, pad); |
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} |
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skb->data[0] = len; |
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skb->data[1] = len >> 8; |
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return skb; |
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} |
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|
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static void dm9601_status(struct usbnet *dev, struct urb *urb) |
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{ |
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int link; |
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u8 *buf; |
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|
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/* format: |
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b0: net status |
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b1: tx status 1 |
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b2: tx status 2 |
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b3: rx status |
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b4: rx overflow |
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b5: rx count |
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b6: tx count |
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b7: gpr |
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*/ |
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|
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if (urb->actual_length < 8) |
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return; |
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|
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buf = urb->transfer_buffer; |
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|
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link = !!(buf[0] & 0x40); |
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if (netif_carrier_ok(dev->net) != link) { |
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usbnet_link_change(dev, link, 1); |
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netdev_dbg(dev->net, "Link Status is: %d\n", link); |
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} |
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} |
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|
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static int dm9601_link_reset(struct usbnet *dev) |
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{ |
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struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET }; |
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|
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mii_check_media(&dev->mii, 1, 1); |
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mii_ethtool_gset(&dev->mii, &ecmd); |
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|
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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, |
|
}, |
|
{ |
|
USB_DEVICE(0x0586, 0x3427), /* ZyXEL Keenetic Plus DSL xDSL modem */ |
|
.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 <[email protected]>"); |
|
MODULE_DESCRIPTION("Davicom DM96xx USB 10/100 ethernet devices"); |
|
MODULE_LICENSE("GPL");
|
|
|