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630 lines
16 KiB
630 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* MOSCHIP MCS7830 based (7730/7830/7832) USB 2.0 Ethernet Devices |
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* |
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* based on usbnet.c, asix.c and the vendor provided mcs7830 driver |
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* |
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* Copyright (C) 2010 Andreas Mohr <[email protected]> |
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* Copyright (C) 2006 Arnd Bergmann <[email protected]> |
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* Copyright (C) 2003-2005 David Hollis <[email protected]> |
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* Copyright (C) 2005 Phil Chang <[email protected]> |
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* Copyright (c) 2002-2003 TiVo Inc. |
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* |
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* Definitions gathered from MOSCHIP, Data Sheet_7830DA.pdf (thanks!). |
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* |
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* 2010-12-19: add 7832 USB PID ("functionality same as MCS7830"), |
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* per active notification by manufacturer |
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* |
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* TODO: |
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* - support HIF_REG_CONFIG_SLEEPMODE/HIF_REG_CONFIG_TXENABLE (via autopm?) |
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* - implement ethtool_ops get_pauseparam/set_pauseparam |
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* via HIF_REG_PAUSE_THRESHOLD (>= revision C only!) |
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* - implement get_eeprom/[set_eeprom] |
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* - switch PHY on/off on ifup/ifdown (perhaps in usbnet.c, via MII) |
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* - mcs7830_get_regs() handling is weird: for rev 2 we return 32 regs, |
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* can access only ~ 24, remaining user buffer is uninitialized garbage |
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* - anything else? |
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*/ |
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#include <linux/crc32.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/module.h> |
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#include <linux/netdevice.h> |
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#include <linux/slab.h> |
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#include <linux/usb.h> |
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#include <linux/usb/usbnet.h> |
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/* requests */ |
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#define MCS7830_RD_BMREQ (USB_DIR_IN | USB_TYPE_VENDOR | \ |
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USB_RECIP_DEVICE) |
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#define MCS7830_WR_BMREQ (USB_DIR_OUT | USB_TYPE_VENDOR | \ |
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USB_RECIP_DEVICE) |
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#define MCS7830_RD_BREQ 0x0E |
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#define MCS7830_WR_BREQ 0x0D |
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#define MCS7830_CTRL_TIMEOUT 1000 |
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#define MCS7830_MAX_MCAST 64 |
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#define MCS7830_VENDOR_ID 0x9710 |
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#define MCS7832_PRODUCT_ID 0x7832 |
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#define MCS7830_PRODUCT_ID 0x7830 |
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#define MCS7730_PRODUCT_ID 0x7730 |
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#define SITECOM_VENDOR_ID 0x0DF6 |
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#define LN_030_PRODUCT_ID 0x0021 |
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#define MCS7830_MII_ADVERTISE (ADVERTISE_PAUSE_CAP | ADVERTISE_100FULL | \ |
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ADVERTISE_100HALF | ADVERTISE_10FULL | \ |
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ADVERTISE_10HALF | ADVERTISE_CSMA) |
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/* HIF_REG_XX corresponding index value */ |
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enum { |
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HIF_REG_MULTICAST_HASH = 0x00, |
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HIF_REG_PACKET_GAP1 = 0x08, |
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HIF_REG_PACKET_GAP2 = 0x09, |
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HIF_REG_PHY_DATA = 0x0a, |
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HIF_REG_PHY_CMD1 = 0x0c, |
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HIF_REG_PHY_CMD1_READ = 0x40, |
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HIF_REG_PHY_CMD1_WRITE = 0x20, |
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HIF_REG_PHY_CMD1_PHYADDR = 0x01, |
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HIF_REG_PHY_CMD2 = 0x0d, |
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HIF_REG_PHY_CMD2_PEND_FLAG_BIT = 0x80, |
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HIF_REG_PHY_CMD2_READY_FLAG_BIT = 0x40, |
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HIF_REG_CONFIG = 0x0e, |
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/* hmm, spec sez: "R/W", "Except bit 3" (likely TXENABLE). */ |
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HIF_REG_CONFIG_CFG = 0x80, |
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HIF_REG_CONFIG_SPEED100 = 0x40, |
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HIF_REG_CONFIG_FULLDUPLEX_ENABLE = 0x20, |
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HIF_REG_CONFIG_RXENABLE = 0x10, |
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HIF_REG_CONFIG_TXENABLE = 0x08, |
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HIF_REG_CONFIG_SLEEPMODE = 0x04, |
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HIF_REG_CONFIG_ALLMULTICAST = 0x02, |
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HIF_REG_CONFIG_PROMISCUOUS = 0x01, |
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HIF_REG_ETHERNET_ADDR = 0x0f, |
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HIF_REG_FRAME_DROP_COUNTER = 0x15, /* 0..ff; reset: 0 */ |
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HIF_REG_PAUSE_THRESHOLD = 0x16, |
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HIF_REG_PAUSE_THRESHOLD_DEFAULT = 0, |
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}; |
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/* Trailing status byte in Ethernet Rx frame */ |
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enum { |
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MCS7830_RX_SHORT_FRAME = 0x01, /* < 64 bytes */ |
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MCS7830_RX_LENGTH_ERROR = 0x02, /* framelen != Ethernet length field */ |
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MCS7830_RX_ALIGNMENT_ERROR = 0x04, /* non-even number of nibbles */ |
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MCS7830_RX_CRC_ERROR = 0x08, |
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MCS7830_RX_LARGE_FRAME = 0x10, /* > 1518 bytes */ |
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MCS7830_RX_FRAME_CORRECT = 0x20, /* frame is correct */ |
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/* [7:6] reserved */ |
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}; |
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struct mcs7830_data { |
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u8 multi_filter[8]; |
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u8 config; |
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}; |
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static const char driver_name[] = "MOSCHIP usb-ethernet driver"; |
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static int mcs7830_get_reg(struct usbnet *dev, u16 index, u16 size, void *data) |
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{ |
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return usbnet_read_cmd(dev, MCS7830_RD_BREQ, MCS7830_RD_BMREQ, |
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0x0000, index, data, size); |
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} |
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static int mcs7830_set_reg(struct usbnet *dev, u16 index, u16 size, const void *data) |
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{ |
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return usbnet_write_cmd(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ, |
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0x0000, index, data, size); |
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} |
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static void mcs7830_set_reg_async(struct usbnet *dev, u16 index, u16 size, void *data) |
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{ |
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usbnet_write_cmd_async(dev, MCS7830_WR_BREQ, MCS7830_WR_BMREQ, |
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0x0000, index, data, size); |
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} |
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static int mcs7830_hif_get_mac_address(struct usbnet *dev, unsigned char *addr) |
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{ |
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int ret = mcs7830_get_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr); |
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if (ret < 0) |
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return ret; |
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return 0; |
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} |
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static int mcs7830_hif_set_mac_address(struct usbnet *dev, unsigned char *addr) |
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{ |
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int ret = mcs7830_set_reg(dev, HIF_REG_ETHERNET_ADDR, ETH_ALEN, addr); |
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if (ret < 0) |
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return ret; |
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return 0; |
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} |
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static int mcs7830_set_mac_address(struct net_device *netdev, void *p) |
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{ |
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int ret; |
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struct usbnet *dev = netdev_priv(netdev); |
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struct sockaddr *addr = p; |
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if (netif_running(netdev)) |
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return -EBUSY; |
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if (!is_valid_ether_addr(addr->sa_data)) |
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return -EADDRNOTAVAIL; |
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ret = mcs7830_hif_set_mac_address(dev, addr->sa_data); |
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if (ret < 0) |
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return ret; |
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/* it worked --> adopt it on netdev side */ |
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memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); |
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return 0; |
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} |
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static int mcs7830_read_phy(struct usbnet *dev, u8 index) |
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{ |
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int ret; |
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int i; |
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__le16 val; |
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u8 cmd[2] = { |
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HIF_REG_PHY_CMD1_READ | HIF_REG_PHY_CMD1_PHYADDR, |
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HIF_REG_PHY_CMD2_PEND_FLAG_BIT | index, |
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}; |
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mutex_lock(&dev->phy_mutex); |
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/* write the MII command */ |
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ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd); |
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if (ret < 0) |
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goto out; |
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/* wait for the data to become valid, should be within < 1ms */ |
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for (i = 0; i < 10; i++) { |
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ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd); |
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if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT)) |
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break; |
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ret = -EIO; |
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msleep(1); |
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} |
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if (ret < 0) |
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goto out; |
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/* read actual register contents */ |
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ret = mcs7830_get_reg(dev, HIF_REG_PHY_DATA, 2, &val); |
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if (ret < 0) |
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goto out; |
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ret = le16_to_cpu(val); |
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dev_dbg(&dev->udev->dev, "read PHY reg %02x: %04x (%d tries)\n", |
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index, val, i); |
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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 mcs7830_write_phy(struct usbnet *dev, u8 index, u16 val) |
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{ |
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int ret; |
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int i; |
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__le16 le_val; |
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u8 cmd[2] = { |
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HIF_REG_PHY_CMD1_WRITE | HIF_REG_PHY_CMD1_PHYADDR, |
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HIF_REG_PHY_CMD2_PEND_FLAG_BIT | (index & 0x1F), |
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}; |
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mutex_lock(&dev->phy_mutex); |
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/* write the new register contents */ |
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le_val = cpu_to_le16(val); |
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ret = mcs7830_set_reg(dev, HIF_REG_PHY_DATA, 2, &le_val); |
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if (ret < 0) |
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goto out; |
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/* write the MII command */ |
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ret = mcs7830_set_reg(dev, HIF_REG_PHY_CMD1, 2, cmd); |
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if (ret < 0) |
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goto out; |
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/* wait for the command to be accepted by the PHY */ |
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for (i = 0; i < 10; i++) { |
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ret = mcs7830_get_reg(dev, HIF_REG_PHY_CMD1, 2, cmd); |
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if ((ret < 0) || (cmd[1] & HIF_REG_PHY_CMD2_READY_FLAG_BIT)) |
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break; |
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ret = -EIO; |
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msleep(1); |
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} |
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if (ret < 0) |
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goto out; |
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ret = 0; |
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dev_dbg(&dev->udev->dev, "write PHY reg %02x: %04x (%d tries)\n", |
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index, val, i); |
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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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/* |
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* This algorithm comes from the original mcs7830 version 1.4 driver, |
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* not sure if it is needed. |
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*/ |
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static int mcs7830_set_autoneg(struct usbnet *dev, int ptrUserPhyMode) |
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{ |
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int ret; |
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/* Enable all media types */ |
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ret = mcs7830_write_phy(dev, MII_ADVERTISE, MCS7830_MII_ADVERTISE); |
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/* First reset BMCR */ |
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if (!ret) |
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ret = mcs7830_write_phy(dev, MII_BMCR, 0x0000); |
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/* Enable Auto Neg */ |
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if (!ret) |
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ret = mcs7830_write_phy(dev, MII_BMCR, BMCR_ANENABLE); |
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/* Restart Auto Neg (Keep the Enable Auto Neg Bit Set) */ |
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if (!ret) |
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ret = mcs7830_write_phy(dev, MII_BMCR, |
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BMCR_ANENABLE | BMCR_ANRESTART ); |
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return ret; |
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} |
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/* |
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* if we can read register 22, the chip revision is C or higher |
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*/ |
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static int mcs7830_get_rev(struct usbnet *dev) |
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{ |
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u8 dummy[2]; |
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int ret; |
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ret = mcs7830_get_reg(dev, HIF_REG_FRAME_DROP_COUNTER, 2, dummy); |
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if (ret > 0) |
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return 2; /* Rev C or later */ |
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return 1; /* earlier revision */ |
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} |
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/* |
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* On rev. C we need to set the pause threshold |
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*/ |
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static void mcs7830_rev_C_fixup(struct usbnet *dev) |
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{ |
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u8 pause_threshold = HIF_REG_PAUSE_THRESHOLD_DEFAULT; |
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int retry; |
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for (retry = 0; retry < 2; retry++) { |
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if (mcs7830_get_rev(dev) == 2) { |
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dev_info(&dev->udev->dev, "applying rev.C fixup\n"); |
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mcs7830_set_reg(dev, HIF_REG_PAUSE_THRESHOLD, |
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1, &pause_threshold); |
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} |
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msleep(1); |
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} |
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} |
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static int mcs7830_mdio_read(struct net_device *netdev, int phy_id, |
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int location) |
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{ |
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struct usbnet *dev = netdev_priv(netdev); |
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return mcs7830_read_phy(dev, location); |
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} |
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static void mcs7830_mdio_write(struct net_device *netdev, int phy_id, |
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int location, int val) |
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{ |
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struct usbnet *dev = netdev_priv(netdev); |
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mcs7830_write_phy(dev, location, val); |
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} |
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static int mcs7830_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 inline struct mcs7830_data *mcs7830_get_data(struct usbnet *dev) |
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{ |
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return (struct mcs7830_data *)&dev->data; |
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} |
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static void mcs7830_hif_update_multicast_hash(struct usbnet *dev) |
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{ |
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struct mcs7830_data *data = mcs7830_get_data(dev); |
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mcs7830_set_reg_async(dev, HIF_REG_MULTICAST_HASH, |
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sizeof data->multi_filter, |
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data->multi_filter); |
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} |
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static void mcs7830_hif_update_config(struct usbnet *dev) |
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{ |
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/* implementation specific to data->config |
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(argument needs to be heap-based anyway - USB DMA!) */ |
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struct mcs7830_data *data = mcs7830_get_data(dev); |
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mcs7830_set_reg_async(dev, HIF_REG_CONFIG, 1, &data->config); |
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} |
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static void mcs7830_data_set_multicast(struct net_device *net) |
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{ |
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struct usbnet *dev = netdev_priv(net); |
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struct mcs7830_data *data = mcs7830_get_data(dev); |
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memset(data->multi_filter, 0, sizeof data->multi_filter); |
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data->config = HIF_REG_CONFIG_TXENABLE; |
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/* this should not be needed, but it doesn't work otherwise */ |
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data->config |= HIF_REG_CONFIG_ALLMULTICAST; |
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if (net->flags & IFF_PROMISC) { |
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data->config |= HIF_REG_CONFIG_PROMISCUOUS; |
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} else if (net->flags & IFF_ALLMULTI || |
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netdev_mc_count(net) > MCS7830_MAX_MCAST) { |
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data->config |= HIF_REG_CONFIG_ALLMULTICAST; |
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} else if (netdev_mc_empty(net)) { |
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/* just broadcast and directed */ |
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} else { |
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/* We use the 20 byte dev->data |
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* for our 8 byte filter buffer |
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* to avoid allocating memory that |
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* is tricky to free later */ |
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struct netdev_hw_addr *ha; |
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u32 crc_bits; |
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/* Build the multicast hash filter. */ |
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netdev_for_each_mc_addr(ha, net) { |
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crc_bits = ether_crc(ETH_ALEN, ha->addr) >> 26; |
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data->multi_filter[crc_bits >> 3] |= 1 << (crc_bits & 7); |
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} |
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} |
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} |
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static int mcs7830_apply_base_config(struct usbnet *dev) |
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{ |
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int ret; |
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/* re-configure known MAC (suspend case etc.) */ |
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ret = mcs7830_hif_set_mac_address(dev, dev->net->dev_addr); |
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if (ret) { |
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dev_info(&dev->udev->dev, "Cannot set MAC address\n"); |
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goto out; |
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} |
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/* Set up PHY */ |
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ret = mcs7830_set_autoneg(dev, 0); |
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if (ret) { |
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dev_info(&dev->udev->dev, "Cannot set autoneg\n"); |
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goto out; |
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} |
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mcs7830_hif_update_multicast_hash(dev); |
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mcs7830_hif_update_config(dev); |
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mcs7830_rev_C_fixup(dev); |
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ret = 0; |
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out: |
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return ret; |
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} |
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/* credits go to asix_set_multicast */ |
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static void mcs7830_set_multicast(struct net_device *net) |
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{ |
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struct usbnet *dev = netdev_priv(net); |
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mcs7830_data_set_multicast(net); |
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mcs7830_hif_update_multicast_hash(dev); |
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mcs7830_hif_update_config(dev); |
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} |
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static int mcs7830_get_regs_len(struct net_device *net) |
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{ |
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struct usbnet *dev = netdev_priv(net); |
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switch (mcs7830_get_rev(dev)) { |
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case 1: |
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return 21; |
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case 2: |
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return 32; |
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} |
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return 0; |
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} |
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static void mcs7830_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *drvinfo) |
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{ |
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usbnet_get_drvinfo(net, drvinfo); |
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} |
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static void mcs7830_get_regs(struct net_device *net, struct ethtool_regs *regs, void *data) |
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{ |
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struct usbnet *dev = netdev_priv(net); |
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regs->version = mcs7830_get_rev(dev); |
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mcs7830_get_reg(dev, 0, regs->len, data); |
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} |
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static const struct ethtool_ops mcs7830_ethtool_ops = { |
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.get_drvinfo = mcs7830_get_drvinfo, |
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.get_regs_len = mcs7830_get_regs_len, |
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.get_regs = mcs7830_get_regs, |
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/* common usbnet calls */ |
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.get_link = usbnet_get_link, |
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.get_msglevel = usbnet_get_msglevel, |
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.set_msglevel = usbnet_set_msglevel, |
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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 const struct net_device_ops mcs7830_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 = mcs7830_ioctl, |
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.ndo_set_rx_mode = mcs7830_set_multicast, |
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.ndo_set_mac_address = mcs7830_set_mac_address, |
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}; |
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static int mcs7830_bind(struct usbnet *dev, struct usb_interface *udev) |
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{ |
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struct net_device *net = dev->net; |
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int ret; |
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int retry; |
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/* Initial startup: Gather MAC address setting from EEPROM */ |
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ret = -EINVAL; |
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for (retry = 0; retry < 5 && ret; retry++) |
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ret = mcs7830_hif_get_mac_address(dev, net->dev_addr); |
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if (ret) { |
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dev_warn(&dev->udev->dev, "Cannot read MAC address\n"); |
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goto out; |
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} |
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mcs7830_data_set_multicast(net); |
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ret = mcs7830_apply_base_config(dev); |
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if (ret) |
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goto out; |
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net->ethtool_ops = &mcs7830_ethtool_ops; |
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net->netdev_ops = &mcs7830_netdev_ops; |
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|
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/* reserve space for the status byte on rx */ |
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dev->rx_urb_size = ETH_FRAME_LEN + 1; |
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dev->mii.mdio_read = mcs7830_mdio_read; |
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dev->mii.mdio_write = mcs7830_mdio_write; |
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dev->mii.dev = net; |
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dev->mii.phy_id_mask = 0x3f; |
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dev->mii.reg_num_mask = 0x1f; |
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dev->mii.phy_id = *((u8 *) net->dev_addr + 1); |
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|
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ret = usbnet_get_endpoints(dev, udev); |
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out: |
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return ret; |
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} |
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|
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/* The chip always appends a status byte that we need to strip */ |
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static int mcs7830_rx_fixup(struct usbnet *dev, struct sk_buff *skb) |
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{ |
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u8 status; |
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|
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/* This check is no longer done by usbnet */ |
|
if (skb->len < dev->net->hard_header_len) { |
|
dev_err(&dev->udev->dev, "unexpected tiny rx frame\n"); |
|
return 0; |
|
} |
|
|
|
skb_trim(skb, skb->len - 1); |
|
status = skb->data[skb->len]; |
|
|
|
if (status != MCS7830_RX_FRAME_CORRECT) { |
|
dev_dbg(&dev->udev->dev, "rx fixup status %x\n", status); |
|
|
|
/* hmm, perhaps usbnet.c already sees a globally visible |
|
frame error and increments rx_errors on its own already? */ |
|
dev->net->stats.rx_errors++; |
|
|
|
if (status & (MCS7830_RX_SHORT_FRAME |
|
|MCS7830_RX_LENGTH_ERROR |
|
|MCS7830_RX_LARGE_FRAME)) |
|
dev->net->stats.rx_length_errors++; |
|
if (status & MCS7830_RX_ALIGNMENT_ERROR) |
|
dev->net->stats.rx_frame_errors++; |
|
if (status & MCS7830_RX_CRC_ERROR) |
|
dev->net->stats.rx_crc_errors++; |
|
} |
|
|
|
return skb->len > 0; |
|
} |
|
|
|
static void mcs7830_status(struct usbnet *dev, struct urb *urb) |
|
{ |
|
u8 *buf = urb->transfer_buffer; |
|
bool link, link_changed; |
|
|
|
if (urb->actual_length < 16) |
|
return; |
|
|
|
link = !(buf[1] == 0x20); |
|
link_changed = netif_carrier_ok(dev->net) != link; |
|
if (link_changed) { |
|
usbnet_link_change(dev, link, 0); |
|
netdev_dbg(dev->net, "Link Status is: %d\n", link); |
|
} |
|
} |
|
|
|
static const struct driver_info moschip_info = { |
|
.description = "MOSCHIP 7830/7832/7730 usb-NET adapter", |
|
.bind = mcs7830_bind, |
|
.rx_fixup = mcs7830_rx_fixup, |
|
.flags = FLAG_ETHER | FLAG_LINK_INTR, |
|
.status = mcs7830_status, |
|
.in = 1, |
|
.out = 2, |
|
}; |
|
|
|
static const struct driver_info sitecom_info = { |
|
.description = "Sitecom LN-30 usb-NET adapter", |
|
.bind = mcs7830_bind, |
|
.rx_fixup = mcs7830_rx_fixup, |
|
.flags = FLAG_ETHER | FLAG_LINK_INTR, |
|
.status = mcs7830_status, |
|
.in = 1, |
|
.out = 2, |
|
}; |
|
|
|
static const struct usb_device_id products[] = { |
|
{ |
|
USB_DEVICE(MCS7830_VENDOR_ID, MCS7832_PRODUCT_ID), |
|
.driver_info = (unsigned long) &moschip_info, |
|
}, |
|
{ |
|
USB_DEVICE(MCS7830_VENDOR_ID, MCS7830_PRODUCT_ID), |
|
.driver_info = (unsigned long) &moschip_info, |
|
}, |
|
{ |
|
USB_DEVICE(MCS7830_VENDOR_ID, MCS7730_PRODUCT_ID), |
|
.driver_info = (unsigned long) &moschip_info, |
|
}, |
|
{ |
|
USB_DEVICE(SITECOM_VENDOR_ID, LN_030_PRODUCT_ID), |
|
.driver_info = (unsigned long) &sitecom_info, |
|
}, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(usb, products); |
|
|
|
static int mcs7830_reset_resume (struct usb_interface *intf) |
|
{ |
|
/* YES, this function is successful enough that ethtool -d |
|
does show same output pre-/post-suspend */ |
|
|
|
struct usbnet *dev = usb_get_intfdata(intf); |
|
|
|
mcs7830_apply_base_config(dev); |
|
|
|
usbnet_resume(intf); |
|
|
|
return 0; |
|
} |
|
|
|
static struct usb_driver mcs7830_driver = { |
|
.name = driver_name, |
|
.id_table = products, |
|
.probe = usbnet_probe, |
|
.disconnect = usbnet_disconnect, |
|
.suspend = usbnet_suspend, |
|
.resume = usbnet_resume, |
|
.reset_resume = mcs7830_reset_resume, |
|
.disable_hub_initiated_lpm = 1, |
|
}; |
|
|
|
module_usb_driver(mcs7830_driver); |
|
|
|
MODULE_DESCRIPTION("USB to network adapter MCS7830)"); |
|
MODULE_LICENSE("GPL");
|
|
|