diff options
Diffstat (limited to 'drivers/net/usb/smsc95xx.c')
| -rw-r--r-- | drivers/net/usb/smsc95xx.c | 1225 |
1 files changed, 1225 insertions, 0 deletions
diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c new file mode 100644 index 000000000000..51e2f5d7d14e --- /dev/null +++ b/drivers/net/usb/smsc95xx.c @@ -0,0 +1,1225 @@ + /*************************************************************************** + * + * Copyright (C) 2007-2008 SMSC + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + *****************************************************************************/ + +#include <linux/module.h> +#include <linux/kmod.h> +#include <linux/init.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/mii.h> +#include <linux/usb.h> +#include <linux/crc32.h> +#include <linux/usb/usbnet.h> +#include "smsc95xx.h" + +#define SMSC_CHIPNAME "smsc95xx" +#define SMSC_DRIVER_VERSION "1.0.3" +#define HS_USB_PKT_SIZE (512) +#define FS_USB_PKT_SIZE (64) +#define DEFAULT_HS_BURST_CAP_SIZE (16 * 1024 + 5 * HS_USB_PKT_SIZE) +#define DEFAULT_FS_BURST_CAP_SIZE (6 * 1024 + 33 * FS_USB_PKT_SIZE) +#define DEFAULT_BULK_IN_DELAY (0x00002000) +#define MAX_SINGLE_PACKET_SIZE (2048) +#define LAN95XX_EEPROM_MAGIC (0x9500) +#define EEPROM_MAC_OFFSET (0x01) +#define DEFAULT_RX_CSUM_ENABLE (true) +#define SMSC95XX_INTERNAL_PHY_ID (1) +#define SMSC95XX_TX_OVERHEAD (8) +#define FLOW_CTRL_TX (1) +#define FLOW_CTRL_RX (2) + +struct smsc95xx_priv { + u32 mac_cr; + spinlock_t mac_cr_lock; + bool use_rx_csum; +}; + +struct usb_context { + struct usb_ctrlrequest req; + struct completion notify; + struct usbnet *dev; +}; + +int turbo_mode = true; +module_param(turbo_mode, bool, 0644); +MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); + +static int smsc95xx_read_reg(struct usbnet *dev, u32 index, u32 *data) +{ + u32 *buf = kmalloc(4, GFP_KERNEL); + int ret; + + BUG_ON(!dev); + + if (!buf) + return -ENOMEM; + + ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), + USB_VENDOR_REQUEST_READ_REGISTER, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 00, index, buf, 4, USB_CTRL_GET_TIMEOUT); + + if (unlikely(ret < 0)) + devwarn(dev, "Failed to read register index 0x%08x", index); + + le32_to_cpus(buf); + *data = *buf; + kfree(buf); + + return ret; +} + +static int smsc95xx_write_reg(struct usbnet *dev, u32 index, u32 data) +{ + u32 *buf = kmalloc(4, GFP_KERNEL); + int ret; + + BUG_ON(!dev); + + if (!buf) + return -ENOMEM; + + *buf = data; + cpu_to_le32s(buf); + + ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), + USB_VENDOR_REQUEST_WRITE_REGISTER, + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 00, index, buf, 4, USB_CTRL_SET_TIMEOUT); + + if (unlikely(ret < 0)) + devwarn(dev, "Failed to write register index 0x%08x", index); + + kfree(buf); + + return ret; +} + +/* Loop until the read is completed with timeout + * called with phy_mutex held */ +static int smsc95xx_phy_wait_not_busy(struct usbnet *dev) +{ + unsigned long start_time = jiffies; + u32 val; + + do { + smsc95xx_read_reg(dev, MII_ADDR, &val); + if (!(val & MII_BUSY_)) + return 0; + } while (!time_after(jiffies, start_time + HZ)); + + return -EIO; +} + +static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx) +{ + struct usbnet *dev = netdev_priv(netdev); + u32 val, addr; + + mutex_lock(&dev->phy_mutex); + + /* confirm MII not busy */ + if (smsc95xx_phy_wait_not_busy(dev)) { + devwarn(dev, "MII is busy in smsc95xx_mdio_read"); + mutex_unlock(&dev->phy_mutex); + return -EIO; + } + + /* set the address, index & direction (read from PHY) */ + phy_id &= dev->mii.phy_id_mask; + idx &= dev->mii.reg_num_mask; + addr = (phy_id << 11) | (idx << 6) | MII_READ_; + smsc95xx_write_reg(dev, MII_ADDR, addr); + + if (smsc95xx_phy_wait_not_busy(dev)) { + devwarn(dev, "Timed out reading MII reg %02X", idx); + mutex_unlock(&dev->phy_mutex); + return -EIO; + } + + smsc95xx_read_reg(dev, MII_DATA, &val); + + mutex_unlock(&dev->phy_mutex); + + return (u16)(val & 0xFFFF); +} + +static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx, + int regval) +{ + struct usbnet *dev = netdev_priv(netdev); + u32 val, addr; + + mutex_lock(&dev->phy_mutex); + + /* confirm MII not busy */ + if (smsc95xx_phy_wait_not_busy(dev)) { + devwarn(dev, "MII is busy in smsc95xx_mdio_write"); + mutex_unlock(&dev->phy_mutex); + return; + } + + val = regval; + smsc95xx_write_reg(dev, MII_DATA, val); + + /* set the address, index & direction (write to PHY) */ + phy_id &= dev->mii.phy_id_mask; + idx &= dev->mii.reg_num_mask; + addr = (phy_id << 11) | (idx << 6) | MII_WRITE_; + smsc95xx_write_reg(dev, MII_ADDR, addr); + + if (smsc95xx_phy_wait_not_busy(dev)) + devwarn(dev, "Timed out writing MII reg %02X", idx); + + mutex_unlock(&dev->phy_mutex); +} + +static int smsc95xx_wait_eeprom(struct usbnet *dev) +{ + unsigned long start_time = jiffies; + u32 val; + + do { + smsc95xx_read_reg(dev, E2P_CMD, &val); + if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_)) + break; + udelay(40); + } while (!time_after(jiffies, start_time + HZ)); + + if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) { + devwarn(dev, "EEPROM read operation timeout"); + return -EIO; + } + + return 0; +} + +static int smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) +{ + unsigned long start_time = jiffies; + u32 val; + + do { + smsc95xx_read_reg(dev, E2P_CMD, &val); + + if (!(val & E2P_CMD_LOADED_)) { + devwarn(dev, "No EEPROM present"); + return -EIO; + } + + if (!(val & E2P_CMD_BUSY_)) + return 0; + + udelay(40); + } while (!time_after(jiffies, start_time + HZ)); + + devwarn(dev, "EEPROM is busy"); + return -EIO; +} + +static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length, + u8 *data) +{ + u32 val; + int i, ret; + + BUG_ON(!dev); + BUG_ON(!data); + + ret = smsc95xx_eeprom_confirm_not_busy(dev); + if (ret) + return ret; + + for (i = 0; i < length; i++) { + val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_); + smsc95xx_write_reg(dev, E2P_CMD, val); + + ret = smsc95xx_wait_eeprom(dev); + if (ret < 0) + return ret; + + smsc95xx_read_reg(dev, E2P_DATA, &val); + + data[i] = val & 0xFF; + offset++; + } + + return 0; +} + +static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length, + u8 *data) +{ + u32 val; + int i, ret; + + BUG_ON(!dev); + BUG_ON(!data); + + ret = smsc95xx_eeprom_confirm_not_busy(dev); + if (ret) + return ret; + + /* Issue write/erase enable command */ + val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_; + smsc95xx_write_reg(dev, E2P_CMD, val); + + ret = smsc95xx_wait_eeprom(dev); + if (ret < 0) + return ret; + + for (i = 0; i < length; i++) { + + /* Fill data register */ + val = data[i]; + smsc95xx_write_reg(dev, E2P_DATA, val); + + /* Send "write" command */ + val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); + smsc95xx_write_reg(dev, E2P_CMD, val); + + ret = smsc95xx_wait_eeprom(dev); + if (ret < 0) + return ret; + + offset++; + } + + return 0; +} + +static void smsc95xx_async_cmd_callback(struct urb *urb, struct pt_regs *regs) +{ + struct usb_context *usb_context = urb->context; + struct usbnet *dev = usb_context->dev; + + if (urb->status < 0) + devwarn(dev, "async callback failed with %d", urb->status); + + complete(&usb_context->notify); + + kfree(usb_context); + usb_free_urb(urb); +} + +static int smsc95xx_write_reg_async(struct usbnet *dev, u16 index, u32 *data) +{ + struct usb_context *usb_context; + int status; + struct urb *urb; + const u16 size = 4; + + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) { + devwarn(dev, "Error allocating URB"); + return -ENOMEM; + } + + usb_context = kmalloc(sizeof(struct usb_context), GFP_ATOMIC); + if (usb_context == NULL) { + devwarn(dev, "Error allocating control msg"); + usb_free_urb(urb); + return -ENOMEM; + } + + usb_context->req.bRequestType = + USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE; + usb_context->req.bRequest = USB_VENDOR_REQUEST_WRITE_REGISTER; + usb_context->req.wValue = 00; + usb_context->req.wIndex = cpu_to_le16(index); + usb_context->req.wLength = cpu_to_le16(size); + init_completion(&usb_context->notify); + + usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0), + (void *)&usb_context->req, data, size, + (usb_complete_t)smsc95xx_async_cmd_callback, + (void *)usb_context); + + status = usb_submit_urb(urb, GFP_ATOMIC); + if (status < 0) { + devwarn(dev, "Error submitting control msg, sts=%d", status); + kfree(usb_context); + usb_free_urb(urb); + } + + return status; +} + +/* returns hash bit number for given MAC address + * example: + * 01 00 5E 00 00 01 -> returns bit number 31 */ +static unsigned int smsc95xx_hash(char addr[ETH_ALEN]) +{ + return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f; +} + +static void smsc95xx_set_multicast(struct net_device *netdev) +{ + struct usbnet *dev = netdev_priv(netdev); + struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); + u32 hash_hi = 0; + u32 hash_lo = 0; + unsigned long flags; + + spin_lock_irqsave(&pdata->mac_cr_lock, flags); + + if (dev->net->flags & IFF_PROMISC) { + if (netif_msg_drv(dev)) + devdbg(dev, "promiscuous mode enabled"); + pdata->mac_cr |= MAC_CR_PRMS_; + pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); + } else if (dev->net->flags & IFF_ALLMULTI) { + if (netif_msg_drv(dev)) + devdbg(dev, "receive all multicast enabled"); + pdata->mac_cr |= MAC_CR_MCPAS_; + pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); + } else if (dev->net->mc_count > 0) { + struct dev_mc_list *mc_list = dev->net->mc_list; + int count = 0; + + pdata->mac_cr |= MAC_CR_HPFILT_; + pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); + + while (mc_list) { + count++; + if (mc_list->dmi_addrlen == ETH_ALEN) { + u32 bitnum = smsc95xx_hash(mc_list->dmi_addr); + u32 mask = 0x01 << (bitnum & 0x1F); + if (bitnum & 0x20) + hash_hi |= mask; + else + hash_lo |= mask; + } else { + devwarn(dev, "dmi_addrlen != 6"); + } + mc_list = mc_list->next; + } + + if (count != ((u32)dev->net->mc_count)) + devwarn(dev, "mc_count != dev->mc_count"); + + if (netif_msg_drv(dev)) + devdbg(dev, "HASHH=0x%08X, HASHL=0x%08X", hash_hi, + hash_lo); + } else { + if (netif_msg_drv(dev)) + devdbg(dev, "receive own packets only"); + pdata->mac_cr &= + ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_); + } + + spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); + + /* Initiate async writes, as we can't wait for completion here */ + smsc95xx_write_reg_async(dev, HASHH, &hash_hi); + smsc95xx_write_reg_async(dev, HASHL, &hash_lo); + smsc95xx_write_reg_async(dev, MAC_CR, &pdata->mac_cr); +} + +static u8 smsc95xx_resolve_flowctrl_fulldplx(u16 lcladv, u16 rmtadv) +{ + u8 cap = 0; + + if (lcladv & ADVERTISE_PAUSE_CAP) { + if (lcladv & ADVERTISE_PAUSE_ASYM) { + if (rmtadv & LPA_PAUSE_CAP) + cap = FLOW_CTRL_TX | FLOW_CTRL_RX; + else if (rmtadv & LPA_PAUSE_ASYM) + cap = FLOW_CTRL_RX; + } else { + if (rmtadv & LPA_PAUSE_CAP) + cap = FLOW_CTRL_TX | FLOW_CTRL_RX; + } + } else if (lcladv & ADVERTISE_PAUSE_ASYM) { + if ((rmtadv & LPA_PAUSE_CAP) && (rmtadv & LPA_PAUSE_ASYM)) + cap = FLOW_CTRL_TX; + } + + return cap; +} + +static void smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex, + u16 lcladv, u16 rmtadv) +{ + u32 flow, afc_cfg = 0; + + int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); + if (ret < 0) { + devwarn(dev, "error reading AFC_CFG"); + return; + } + + if (duplex == DUPLEX_FULL) { + u8 cap = smsc95xx_resolve_flowctrl_fulldplx(lcladv, rmtadv); + + if (cap & FLOW_CTRL_RX) + flow = 0xFFFF0002; + else + flow = 0; + + if (cap & FLOW_CTRL_TX) + afc_cfg |= 0xF; + else + afc_cfg &= ~0xF; + + if (netif_msg_link(dev)) + devdbg(dev, "rx pause %s, tx pause %s", + (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), + (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); + } else { + if (netif_msg_link(dev)) + devdbg(dev, "half duplex"); + flow = 0; + afc_cfg |= 0xF; + } + + smsc95xx_write_reg(dev, FLOW, flow); + smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); +} + +static int smsc95xx_link_reset(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); + struct mii_if_info *mii = &dev->mii; + struct ethtool_cmd ecmd; + unsigned long flags; + u16 lcladv, rmtadv; + u32 intdata; + + /* clear interrupt status */ + smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC); + intdata = 0xFFFFFFFF; + smsc95xx_write_reg(dev, INT_STS, intdata); + + mii_check_media(mii, 1, 1); + mii_ethtool_gset(&dev->mii, &ecmd); + lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE); + rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA); + + if (netif_msg_link(dev)) + devdbg(dev, "speed: %d duplex: %d lcladv: %04x rmtadv: %04x", + ecmd.speed, ecmd.duplex, lcladv, rmtadv); + + spin_lock_irqsave(&pdata->mac_cr_lock, flags); + if (ecmd.duplex != DUPLEX_FULL) { + pdata->mac_cr &= ~MAC_CR_FDPX_; + pdata->mac_cr |= MAC_CR_RCVOWN_; + } else { + pdata->mac_cr &= ~MAC_CR_RCVOWN_; + pdata->mac_cr |= MAC_CR_FDPX_; + } + spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); + + smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); + + smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv); + + return 0; +} + +static void smsc95xx_status(struct usbnet *dev, struct urb *urb) +{ + u32 intdata; + + if (urb->actual_length != 4) { + devwarn(dev, "unexpected urb length %d", urb->actual_length); + return; + } + + memcpy(&intdata, urb->transfer_buffer, 4); + le32_to_cpus(&intdata); + + if (netif_msg_link(dev)) + devdbg(dev, "intdata: 0x%08X", intdata); + + if (intdata & INT_ENP_PHY_INT_) + usbnet_defer_kevent(dev, EVENT_LINK_RESET); + else + devwarn(dev, "unexpected interrupt, intdata=0x%08X", intdata); +} + +/* Enable or disable Rx checksum offload engine */ +static int smsc95xx_set_rx_csum(struct usbnet *dev, bool enable) +{ + u32 read_buf; + int ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); + if (ret < 0) { + devwarn(dev, "Failed to read COE_CR: %d", ret); + return ret; + } + + if (enable) + read_buf |= Rx_COE_EN_; + else + read_buf &= ~Rx_COE_EN_; + + ret = smsc95xx_write_reg(dev, COE_CR, read_buf); + if (ret < 0) { + devwarn(dev, "Failed to write COE_CR: %d", ret); + return ret; + } + + if (netif_msg_hw(dev)) + devdbg(dev, "COE_CR = 0x%08x", read_buf); + return 0; +} + +static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net) +{ + return MAX_EEPROM_SIZE; +} + +static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev, + struct ethtool_eeprom *ee, u8 *data) +{ + struct usbnet *dev = netdev_priv(netdev); + + ee->magic = LAN95XX_EEPROM_MAGIC; + + return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data); +} + +static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev, + struct ethtool_eeprom *ee, u8 *data) +{ + struct usbnet *dev = netdev_priv(netdev); + + if (ee->magic != LAN95XX_EEPROM_MAGIC) { + devwarn(dev, "EEPROM: magic value mismatch, magic = 0x%x", + ee->magic); + return -EINVAL; + } + + return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); +} + +static u32 smsc95xx_ethtool_get_rx_csum(struct net_device *netdev) +{ + struct usbnet *dev = netdev_priv(netdev); + struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); + + return pdata->use_rx_csum; +} + +static int smsc95xx_ethtool_set_rx_csum(struct net_device *netdev, u32 val) +{ + struct usbnet *dev = netdev_priv(netdev); + struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); + + pdata->use_rx_csum = !!val; + + return smsc95xx_set_rx_csum(dev, pdata->use_rx_csum); +} + +static struct ethtool_ops smsc95xx_ethtool_ops = { + .get_link = usbnet_get_link, + .nway_reset = usbnet_nway_reset, + .get_drvinfo = usbnet_get_drvinfo, + .get_msglevel = usbnet_get_msglevel, + .set_msglevel = usbnet_set_msglevel, + .get_settings = usbnet_get_settings, + .set_settings = usbnet_set_settings, + .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, + .get_eeprom = smsc95xx_ethtool_get_eeprom, + .set_eeprom = smsc95xx_ethtool_set_eeprom, + .get_rx_csum = smsc95xx_ethtool_get_rx_csum, + .set_rx_csum = smsc95xx_ethtool_set_rx_csum, +}; + +static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) +{ + struct usbnet *dev = netdev_priv(netdev); + + if (!netif_running(netdev)) + return -EINVAL; + + return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); +} + +static void smsc95xx_init_mac_address(struct usbnet *dev) +{ + /* try reading mac address from EEPROM */ + if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, + dev->net->dev_addr) == 0) { + if (is_valid_ether_addr(dev->net->dev_addr)) { + /* eeprom values are valid so use them */ + if (netif_msg_ifup(dev)) + devdbg(dev, "MAC address read from EEPROM"); + return; + } + } + + /* no eeprom, or eeprom values are invalid. generate random MAC */ + random_ether_addr(dev->net->dev_addr); + if (netif_msg_ifup(dev)) + devdbg(dev, "MAC address set to random_ether_addr"); +} + +static int smsc95xx_set_mac_address(struct usbnet *dev) +{ + u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 | + dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24; + u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8; + int ret; + + ret = smsc95xx_write_reg(dev, ADDRL, addr_lo); + if (ret < 0) { + devwarn(dev, "Failed to write ADDRL: %d", ret); + return ret; + } + + ret = smsc95xx_write_reg(dev, ADDRH, addr_hi); + if (ret < 0) { + devwarn(dev, "Failed to write ADDRH: %d", ret); + return ret; + } + + return 0; +} + +/* starts the TX path */ +static void smsc95xx_start_tx_path(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); + unsigned long flags; + u32 reg_val; + + /* Enable Tx at MAC */ + spin_lock_irqsave(&pdata->mac_cr_lock, flags); + pdata->mac_cr |= MAC_CR_TXEN_; + spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); + + smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); + + /* Enable Tx at SCSRs */ + reg_val = TX_CFG_ON_; + smsc95xx_write_reg(dev, TX_CFG, reg_val); +} + +/* Starts the Receive path */ +static void smsc95xx_start_rx_path(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); + unsigned long flags; + + spin_lock_irqsave(&pdata->mac_cr_lock, flags); + pdata->mac_cr |= MAC_CR_RXEN_; + spin_unlock_irqrestore(&pdata->mac_cr_lock, flags); + + smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); +} + +static int smsc95xx_phy_initialize(struct usbnet *dev) +{ + /* Initialize MII structure */ + dev->mii.dev = dev->net; + dev->mii.mdio_read = smsc95xx_mdio_read; + dev->mii.mdio_write = smsc95xx_mdio_write; + dev->mii.phy_id_mask = 0x1f; + dev->mii.reg_num_mask = 0x1f; + dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID; + + smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET); + smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE, + ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | + ADVERTISE_PAUSE_ASYM); + + /* read to clear */ + smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC); + + smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK, + PHY_INT_MASK_DEFAULT_); + mii_nway_restart(&dev->mii); + + if (netif_msg_ifup(dev)) + devdbg(dev, "phy initialised succesfully"); + return 0; +} + +static int smsc95xx_reset(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); + u32 read_buf, write_buf, burst_cap; + int ret = 0, timeout; + DECLARE_MAC_BUF(mac); + + if (netif_msg_ifup(dev)) + devdbg(dev, "entering smsc95xx_reset"); + + write_buf = HW_CFG_LRST_; + ret = smsc95xx_write_reg(dev, HW_CFG, write_buf); + if (ret < 0) { + devwarn(dev, "Failed to write HW_CFG_LRST_ bit in HW_CFG " + "register, ret = %d", ret); + return ret; + } + + timeout = 0; + do { + ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); + if (ret < 0) { + devwarn(dev, "Failed to read HW_CFG: %d", ret); + return ret; + } + msleep(10); + timeout++; + } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); + + if (timeout >= 100) { + devwarn(dev, "timeout waiting for completion of Lite Reset"); + return ret; + } + + write_buf = PM_CTL_PHY_RST_; + ret = smsc95xx_write_reg(dev, PM_CTRL, write_buf); + if (ret < 0) { + devwarn(dev, "Failed to write PM_CTRL: %d", ret); + return ret; + } + + timeout = 0; + do { + ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf); + if (ret < 0) { + devwarn(dev, "Failed to read PM_CTRL: %d", ret); + return ret; + } + msleep(10); + timeout++; + } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100)); + + if (timeout >= 100) { + devwarn(dev, "timeout waiting for PHY Reset"); + return ret; + } + + smsc95xx_init_mac_address(dev); + + ret = smsc95xx_set_mac_address(dev); + if (ret < 0) + return ret; + + if (netif_msg_ifup(dev)) + devdbg(dev, "MAC Address: %s", + print_mac(mac, dev->net->dev_addr)); + + ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); + if (ret < 0) { + devwarn(dev, "Failed to read HW_CFG: %d", ret); + return ret; + } + + if (netif_msg_ifup(dev)) + devdbg(dev, "Read Value from HW_CFG : 0x%08x", read_buf); + + read_buf |= HW_CFG_BIR_; + + ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); + if (ret < 0) { + devwarn(dev, "Failed to write HW_CFG_BIR_ bit in HW_CFG " + "register, ret = %d", ret); + return ret; + } + + ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); + if (ret < 0) { + devwarn(dev, "Failed to read HW_CFG: %d", ret); + return ret; + } + if (netif_msg_ifup(dev)) + devdbg(dev, "Read Value from HW_CFG after writing " + "HW_CFG_BIR_: 0x%08x", read_buf); + + if (!turbo_mode) { + burst_cap = 0; + dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE; + } else if (dev->udev->speed == USB_SPEED_HIGH) { + burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; + dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE; + } else { + burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; + dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE; + } + + if (netif_msg_ifup(dev)) + devdbg(dev, "rx_urb_size=%ld", (ulong)dev->rx_urb_size); + + ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); + if (ret < 0) { + devwarn(dev, "Failed to write BURST_CAP: %d", ret); + return ret; + } + + ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); + if (ret < 0) { + devwarn(dev, "Failed to read BURST_CAP: %d", ret); + return ret; + } + if (netif_msg_ifup(dev)) + devdbg(dev, "Read Value from BURST_CAP after writing: 0x%08x", + read_buf); + + read_buf = DEFAULT_BULK_IN_DELAY; + ret = smsc95xx_write_reg(dev, BULK_IN_DLY, read_buf); + if (ret < 0) { + devwarn(dev, "ret = %d", ret); + return ret; + } + + ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); + if (ret < 0) { + devwarn(dev, "Failed to read BULK_IN_DLY: %d", ret); + return ret; + } + if (netif_msg_ifup(dev)) + devdbg(dev, "Read Value from BULK_IN_DLY after writing: " + "0x%08x", read_buf); + + ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); + if (ret < 0) { + devwarn(dev, "Failed to read HW_CFG: %d", ret); + return ret; + } + if (netif_msg_ifup(dev)) + devdbg(dev, "Read Value from HW_CFG: 0x%08x", read_buf); + + if (turbo_mode) + read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_); + + read_buf &= ~HW_CFG_RXDOFF_; + + /* set Rx data offset=2, Make IP header aligns on word boundary. */ + read_buf |= NET_IP_ALIGN << 9; + + ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); + if (ret < 0) { + devwarn(dev, "Failed to write HW_CFG register, ret=%d", ret); + return ret; + } + + ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); + if (ret < 0) { + devwarn(dev, "Failed to read HW_CFG: %d", ret); + return ret; + } + if (netif_msg_ifup(dev)) + devdbg(dev, "Read Value from HW_CFG after writing: 0x%08x", + read_buf); + + write_buf = 0xFFFFFFFF; + ret = smsc95xx_write_reg(dev, INT_STS, write_buf); + if (ret < 0) { + devwarn(dev, "Failed to write INT_STS register, ret=%d", ret); + return ret; + } + + ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); + if (ret < 0) { + devwarn(dev, "Failed to read ID_REV: %d", ret); + return ret; + } + if (netif_msg_ifup(dev)) + devdbg(dev, "ID_REV = 0x%08x", read_buf); + + /* Init Tx */ + write_buf = 0; + ret = smsc95xx_write_reg(dev, FLOW, write_buf); + if (ret < 0) { + devwarn(dev, "Failed to write FLOW: %d", ret); + return ret; + } + + read_buf = AFC_CFG_DEFAULT; + ret = smsc95xx_write_reg(dev, AFC_CFG, read_buf); + if (ret < 0) { + devwarn(dev, "Failed to write AFC_CFG: %d", ret); + return ret; + } + + /* Don't need mac_cr_lock during initialisation */ + ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); + if (ret < 0) { + devwarn(dev, "Failed to read MAC_CR: %d", ret); + return ret; + } + + /* Init Rx */ + /* Set Vlan */ + write_buf = (u32)ETH_P_8021Q; + ret = smsc95xx_write_reg(dev, VLAN1, write_buf); + if (ret < 0) { + devwarn(dev, "Failed to write VAN1: %d", ret); + return ret; + } + + /* Enable or disable Rx checksum offload engine */ + ret = smsc95xx_set_rx_csum(dev, pdata->use_rx_csum); + if (ret < 0) { + devwarn(dev, "Failed to set Rx csum offload: %d", ret); + return ret; + } + + smsc95xx_set_multicast(dev->net); + + if (smsc95xx_phy_initialize(dev) < 0) + return -EIO; + + ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); + if (ret < 0) { + devwarn(dev, "Failed to read INT_EP_CTL: %d", ret); + return ret; + } + + /* enable PHY interrupts */ + read_buf |= INT_EP_CTL_PHY_INT_; + + ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf); + if (ret < 0) { + devwarn(dev, "Failed to write INT_EP_CTL: %d", ret); + return ret; + } + + smsc95xx_start_tx_path(dev); + smsc95xx_start_rx_path(dev); + + if (netif_msg_ifup(dev)) + devdbg(dev, "smsc95xx_reset, return 0"); + return 0; +} + +static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) +{ + struct smsc95xx_priv *pdata = NULL; + int ret; + + printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); + + ret = usbnet_get_endpoints(dev, intf); + if (ret < 0) { + devwarn(dev, "usbnet_get_endpoints failed: %d", ret); + return ret; + } + + dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv), + GFP_KERNEL); + + pdata = (struct smsc95xx_priv *)(dev->data[0]); + if (!pdata) { + devwarn(dev, "Unable to allocate struct smsc95xx_priv"); + return -ENOMEM; + } + + spin_lock_init(&pdata->mac_cr_lock); + + pdata->use_rx_csum = DEFAULT_RX_CSUM_ENABLE; + + /* Init all registers */ + ret = smsc95xx_reset(dev); + + dev->net->do_ioctl = smsc95xx_ioctl; + dev->net->ethtool_ops = &smsc95xx_ethtool_ops; + dev->net->set_multicast_list = smsc95xx_set_multicast; + dev->net->flags |= IFF_MULTICAST; + dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD; + return 0; +} + +static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) +{ + struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); + if (pdata) { + if (netif_msg_ifdown(dev)) + devdbg(dev, "free pdata"); + kfree(pdata); + pdata = NULL; + dev->data[0] = 0; + } +} + +static void smsc95xx_rx_csum_offload(struct sk_buff *skb) +{ + skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2); + skb->ip_summed = CHECKSUM_COMPLETE; + skb_trim(skb, skb->len - 2); +} + +static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) +{ + struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]); + + while (skb->len > 0) { + u32 header, align_count; + struct sk_buff *ax_skb; + unsigned char *packet; + u16 size; + + memcpy(&header, skb->data, sizeof(header)); + le32_to_cpus(&header); + skb_pull(skb, 4 + NET_IP_ALIGN); + packet = skb->data; + + /* get the packet length */ + size = (u16)((header & RX_STS_FL_) >> 16); + align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; + + if (unlikely(header & RX_STS_ES_)) { + if (netif_msg_rx_err(dev)) + devdbg(dev, "Error header=0x%08x", header); + dev->stats.rx_errors++; + dev->stats.rx_dropped++; + + if (header & RX_STS_CRC_) { + dev->stats.rx_crc_errors++; + } else { + if (header & (RX_STS_TL_ | RX_STS_RF_)) + dev->stats.rx_frame_errors++; + + if ((header & RX_STS_LE_) && + (!(header & RX_STS_FT_))) + dev->stats.rx_length_errors++; + } + } else { + /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ + if (unlikely(size > (ETH_FRAME_LEN + 12))) { + if (netif_msg_rx_err(dev)) + devdbg(dev, "size err header=0x%08x", + header); + return 0; + } + + /* last frame in this batch */ + if (skb->len == size) { + if (pdata->use_rx_csum) + smsc95xx_rx_csum_offload(skb); + + skb->truesize = size + sizeof(struct sk_buff); + + return 1; + } + + ax_skb = skb_clone(skb, GFP_ATOMIC); + if (unlikely(!ax_skb)) { + devwarn(dev, "Error allocating skb"); + return 0; + } + + ax_skb->len = size; + ax_skb->data = packet; + skb_set_tail_pointer(ax_skb, size); + + if (pdata->use_rx_csum) + smsc95xx_rx_csum_offload(ax_skb); + + ax_skb->truesize = size + sizeof(struct sk_buff); + + usbnet_skb_return(dev, ax_skb); + } + + skb_pull(skb, size); + + /* padding bytes before the next frame starts */ + if (skb->len) + skb_pull(skb, align_count); + } + + if (unlikely(skb->len < 0)) { + devwarn(dev, "invalid rx length<0 %d", skb->len); + return 0; + } + + return 1; +} + +static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, + struct sk_buff *skb, gfp_t flags) +{ + u32 tx_cmd_a, tx_cmd_b; + + if (skb_headroom(skb) < SMSC95XX_TX_OVERHEAD) { + struct sk_buff *skb2 = skb_copy_expand(skb, + SMSC95XX_TX_OVERHEAD, 0, flags); + dev_kfree_skb_any(skb); + skb = skb2; + if (!skb) + return NULL; + } + + skb_push(skb, 4); + tx_cmd_b = (u32)(skb->len - 4); + cpu_to_le32s(&tx_cmd_b); + memcpy(skb->data, &tx_cmd_b, 4); + + skb_push(skb, 4); + tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ | + TX_CMD_A_LAST_SEG_; + cpu_to_le32s(&tx_cmd_a); + memcpy(skb->data, &tx_cmd_a, 4); + + return skb; +} + +static const struct driver_info smsc95xx_info = { + .description = "smsc95xx USB 2.0 Ethernet", + .bind = smsc95xx_bind, + .unbind = smsc95xx_unbind, + .link_reset = smsc95xx_link_reset, + .reset = smsc95xx_reset, + .rx_fixup = smsc95xx_rx_fixup, + .tx_fixup = smsc95xx_tx_fixup, + .status = smsc95xx_status, + .flags = FLAG_ETHER, +}; + +static const struct usb_device_id products[] = { + { + /* SMSC9500 USB Ethernet Device */ + USB_DEVICE(0x0424, 0x9500), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { }, /* END */ +}; +MODULE_DEVICE_TABLE(usb, products); + +static struct usb_driver smsc95xx_driver = { + .name = "smsc95xx", + .id_table = products, + .probe = usbnet_probe, + .suspend = usbnet_suspend, + .resume = usbnet_resume, + .disconnect = usbnet_disconnect, +}; + +static int __init smsc95xx_init(void) +{ + return usb_register(&smsc95xx_driver); +} +module_init(smsc95xx_init); + +static void __exit smsc95xx_exit(void) +{ + usb_deregister(&smsc95xx_driver); +} +module_exit(smsc95xx_exit); + +MODULE_AUTHOR("Nancy Lin"); +MODULE_AUTHOR("Steve Glendinning <steve.glendinning@smsc.com>"); +MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); +MODULE_LICENSE("GPL"); |