diff options
Diffstat (limited to 'drivers/net/usb/smsc95xx.c')
| -rw-r--r-- | drivers/net/usb/smsc95xx.c | 2133 |
1 files changed, 2133 insertions, 0 deletions
diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c new file mode 100644 index 000000000..a530f20ee --- /dev/null +++ b/drivers/net/usb/smsc95xx.c @@ -0,0 +1,2133 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + /*************************************************************************** + * + * Copyright (C) 2007-2008 SMSC + * + *****************************************************************************/ + +#include <linux/module.h> +#include <linux/kmod.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/mii.h> +#include <linux/usb.h> +#include <linux/bitrev.h> +#include <linux/crc16.h> +#include <linux/crc32.h> +#include <linux/usb/usbnet.h> +#include <linux/slab.h> +#include <linux/of_net.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/mdio.h> +#include <linux/phy.h> +#include <net/selftests.h> + +#include "smsc95xx.h" + +#define SMSC_CHIPNAME "smsc95xx" +#define SMSC_DRIVER_VERSION "2.0.0" +#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_TX_CSUM_ENABLE (true) +#define DEFAULT_RX_CSUM_ENABLE (true) +#define SMSC95XX_INTERNAL_PHY_ID (1) +#define SMSC95XX_TX_OVERHEAD (8) +#define SMSC95XX_TX_OVERHEAD_CSUM (12) +#define SUPPORTED_WAKE (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \ + WAKE_MCAST | WAKE_ARP | WAKE_MAGIC) + +#define FEATURE_8_WAKEUP_FILTERS (0x01) +#define FEATURE_PHY_NLP_CROSSOVER (0x02) +#define FEATURE_REMOTE_WAKEUP (0x04) + +#define SUSPEND_SUSPEND0 (0x01) +#define SUSPEND_SUSPEND1 (0x02) +#define SUSPEND_SUSPEND2 (0x04) +#define SUSPEND_SUSPEND3 (0x08) +#define SUSPEND_ALLMODES (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \ + SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3) + +#define SMSC95XX_NR_IRQS (1) /* raise to 12 for GPIOs */ +#define PHY_HWIRQ (SMSC95XX_NR_IRQS - 1) + +struct smsc95xx_priv { + u32 mac_cr; + u32 hash_hi; + u32 hash_lo; + u32 wolopts; + spinlock_t mac_cr_lock; + u8 features; + u8 suspend_flags; + bool is_internal_phy; + struct irq_chip irqchip; + struct irq_domain *irqdomain; + struct fwnode_handle *irqfwnode; + struct mii_bus *mdiobus; + struct phy_device *phydev; + struct task_struct *pm_task; +}; + +static bool turbo_mode = true; +module_param(turbo_mode, bool, 0644); +MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction"); + +static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index, + u32 *data) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + u32 buf; + int ret; + int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16); + + if (current != pdata->pm_task) + fn = usbnet_read_cmd; + else + fn = usbnet_read_cmd_nopm; + + ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN + | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0, index, &buf, 4); + if (ret < 4) { + ret = ret < 0 ? ret : -ENODATA; + + if (ret != -ENODEV) + netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n", + index, ret); + return ret; + } + + le32_to_cpus(&buf); + *data = buf; + + return ret; +} + +static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index, + u32 data) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + u32 buf; + int ret; + int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16); + + if (current != pdata->pm_task) + fn = usbnet_write_cmd; + else + fn = usbnet_write_cmd_nopm; + + buf = data; + cpu_to_le32s(&buf); + + ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT + | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0, index, &buf, 4); + if (ret < 0 && ret != -ENODEV) + netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n", + index, ret); + + return ret; +} + +/* Loop until the read is completed with timeout + * called with phy_mutex held */ +static int __must_check smsc95xx_phy_wait_not_busy(struct usbnet *dev) +{ + unsigned long start_time = jiffies; + u32 val; + int ret; + + do { + ret = smsc95xx_read_reg(dev, MII_ADDR, &val); + if (ret < 0) { + /* Ignore -ENODEV error during disconnect() */ + if (ret == -ENODEV) + return 0; + netdev_warn(dev->net, "Error reading MII_ACCESS\n"); + return ret; + } + + if (!(val & MII_BUSY_)) + return 0; + } while (!time_after(jiffies, start_time + HZ)); + + return -EIO; +} + +static u32 mii_address_cmd(int phy_id, int idx, u16 op) +{ + return (phy_id & 0x1f) << 11 | (idx & 0x1f) << 6 | op; +} + +static int smsc95xx_mdio_read(struct usbnet *dev, int phy_id, int idx) +{ + u32 val, addr; + int ret; + + mutex_lock(&dev->phy_mutex); + + /* confirm MII not busy */ + ret = smsc95xx_phy_wait_not_busy(dev); + if (ret < 0) { + netdev_warn(dev->net, "%s: MII is busy\n", __func__); + goto done; + } + + /* set the address, index & direction (read from PHY) */ + addr = mii_address_cmd(phy_id, idx, MII_READ_ | MII_BUSY_); + ret = smsc95xx_write_reg(dev, MII_ADDR, addr); + if (ret < 0) { + if (ret != -ENODEV) + netdev_warn(dev->net, "Error writing MII_ADDR\n"); + goto done; + } + + ret = smsc95xx_phy_wait_not_busy(dev); + if (ret < 0) { + netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx); + goto done; + } + + ret = smsc95xx_read_reg(dev, MII_DATA, &val); + if (ret < 0) { + if (ret != -ENODEV) + netdev_warn(dev->net, "Error reading MII_DATA\n"); + goto done; + } + + ret = (u16)(val & 0xFFFF); + +done: + mutex_unlock(&dev->phy_mutex); + + /* Ignore -ENODEV error during disconnect() */ + if (ret == -ENODEV) + return 0; + return ret; +} + +static void smsc95xx_mdio_write(struct usbnet *dev, int phy_id, int idx, + int regval) +{ + u32 val, addr; + int ret; + + mutex_lock(&dev->phy_mutex); + + /* confirm MII not busy */ + ret = smsc95xx_phy_wait_not_busy(dev); + if (ret < 0) { + netdev_warn(dev->net, "%s: MII is busy\n", __func__); + goto done; + } + + val = regval; + ret = smsc95xx_write_reg(dev, MII_DATA, val); + if (ret < 0) { + if (ret != -ENODEV) + netdev_warn(dev->net, "Error writing MII_DATA\n"); + goto done; + } + + /* set the address, index & direction (write to PHY) */ + addr = mii_address_cmd(phy_id, idx, MII_WRITE_ | MII_BUSY_); + ret = smsc95xx_write_reg(dev, MII_ADDR, addr); + if (ret < 0) { + if (ret != -ENODEV) + netdev_warn(dev->net, "Error writing MII_ADDR\n"); + goto done; + } + + ret = smsc95xx_phy_wait_not_busy(dev); + if (ret < 0) { + netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx); + goto done; + } + +done: + mutex_unlock(&dev->phy_mutex); +} + +static int smsc95xx_mdiobus_reset(struct mii_bus *bus) +{ + struct smsc95xx_priv *pdata; + struct usbnet *dev; + u32 val; + int ret; + + dev = bus->priv; + pdata = dev->driver_priv; + + if (pdata->is_internal_phy) + return 0; + + mutex_lock(&dev->phy_mutex); + + ret = smsc95xx_read_reg(dev, PM_CTRL, &val); + if (ret < 0) + goto reset_out; + + val |= PM_CTL_PHY_RST_; + + ret = smsc95xx_write_reg(dev, PM_CTRL, val); + if (ret < 0) + goto reset_out; + + /* Driver has no knowledge at this point about the external PHY. + * The 802.3 specifies that the reset process shall + * be completed within 0.5 s. + */ + fsleep(500000); + +reset_out: + mutex_unlock(&dev->phy_mutex); + + return 0; +} + +static int smsc95xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) +{ + struct usbnet *dev = bus->priv; + + return smsc95xx_mdio_read(dev, phy_id, idx); +} + +static int smsc95xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, + u16 regval) +{ + struct usbnet *dev = bus->priv; + + smsc95xx_mdio_write(dev, phy_id, idx, regval); + return 0; +} + +static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev) +{ + unsigned long start_time = jiffies; + u32 val; + int ret; + + do { + ret = smsc95xx_read_reg(dev, E2P_CMD, &val); + if (ret < 0) { + netdev_warn(dev->net, "Error reading E2P_CMD\n"); + return ret; + } + + 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_)) { + netdev_warn(dev->net, "EEPROM read operation timeout\n"); + return -EIO; + } + + return 0; +} + +static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev) +{ + unsigned long start_time = jiffies; + u32 val; + int ret; + + do { + ret = smsc95xx_read_reg(dev, E2P_CMD, &val); + if (ret < 0) { + netdev_warn(dev->net, "Error reading E2P_CMD\n"); + return ret; + } + + if (!(val & E2P_CMD_BUSY_)) + return 0; + + udelay(40); + } while (!time_after(jiffies, start_time + HZ)); + + netdev_warn(dev->net, "EEPROM is busy\n"); + 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_); + ret = smsc95xx_write_reg(dev, E2P_CMD, val); + if (ret < 0) { + netdev_warn(dev->net, "Error writing E2P_CMD\n"); + return ret; + } + + ret = smsc95xx_wait_eeprom(dev); + if (ret < 0) + return ret; + + ret = smsc95xx_read_reg(dev, E2P_DATA, &val); + if (ret < 0) { + netdev_warn(dev->net, "Error reading E2P_DATA\n"); + return ret; + } + + 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_; + ret = smsc95xx_write_reg(dev, E2P_CMD, val); + if (ret < 0) { + netdev_warn(dev->net, "Error writing E2P_DATA\n"); + return ret; + } + + ret = smsc95xx_wait_eeprom(dev); + if (ret < 0) + return ret; + + for (i = 0; i < length; i++) { + + /* Fill data register */ + val = data[i]; + ret = smsc95xx_write_reg(dev, E2P_DATA, val); + if (ret < 0) { + netdev_warn(dev->net, "Error writing E2P_DATA\n"); + return ret; + } + + /* Send "write" command */ + val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_); + ret = smsc95xx_write_reg(dev, E2P_CMD, val); + if (ret < 0) { + netdev_warn(dev->net, "Error writing E2P_CMD\n"); + return ret; + } + + ret = smsc95xx_wait_eeprom(dev); + if (ret < 0) + return ret; + + offset++; + } + + return 0; +} + +static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index, + u32 data) +{ + const u16 size = 4; + u32 buf; + int ret; + + buf = data; + cpu_to_le32s(&buf); + + ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, + USB_DIR_OUT | USB_TYPE_VENDOR | + USB_RECIP_DEVICE, + 0, index, &buf, size); + if (ret < 0) + netdev_warn(dev->net, "Error write async cmd, sts=%d\n", + ret); + return ret; +} + +/* 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 = dev->driver_priv; + unsigned long flags; + int ret; + + pdata->hash_hi = 0; + pdata->hash_lo = 0; + + spin_lock_irqsave(&pdata->mac_cr_lock, flags); + + if (dev->net->flags & IFF_PROMISC) { + netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n"); + pdata->mac_cr |= MAC_CR_PRMS_; + pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_); + } else if (dev->net->flags & IFF_ALLMULTI) { + netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n"); + pdata->mac_cr |= MAC_CR_MCPAS_; + pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_); + } else if (!netdev_mc_empty(dev->net)) { + struct netdev_hw_addr *ha; + + pdata->mac_cr |= MAC_CR_HPFILT_; + pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_); + + netdev_for_each_mc_addr(ha, netdev) { + u32 bitnum = smsc95xx_hash(ha->addr); + u32 mask = 0x01 << (bitnum & 0x1F); + if (bitnum & 0x20) + pdata->hash_hi |= mask; + else + pdata->hash_lo |= mask; + } + + netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n", + pdata->hash_hi, pdata->hash_lo); + } else { + netif_dbg(dev, drv, dev->net, "receive own packets only\n"); + 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 */ + ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi); + if (ret < 0) + netdev_warn(dev->net, "failed to initiate async write to HASHH\n"); + + ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo); + if (ret < 0) + netdev_warn(dev->net, "failed to initiate async write to HASHL\n"); + + ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr); + if (ret < 0) + netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n"); +} + +static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev) +{ + u32 flow = 0, afc_cfg; + struct smsc95xx_priv *pdata = dev->driver_priv; + bool tx_pause, rx_pause; + + int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg); + if (ret < 0) + return ret; + + if (pdata->phydev->duplex == DUPLEX_FULL) { + phy_get_pause(pdata->phydev, &tx_pause, &rx_pause); + + if (rx_pause) + flow = 0xFFFF0002; + + if (tx_pause) { + afc_cfg |= 0xF; + flow |= 0xFFFF0000; + } else { + afc_cfg &= ~0xF; + } + + netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n", + rx_pause ? "enabled" : "disabled", + tx_pause ? "enabled" : "disabled"); + } else { + netif_dbg(dev, link, dev->net, "half duplex\n"); + afc_cfg |= 0xF; + } + + ret = smsc95xx_write_reg(dev, FLOW, flow); + if (ret < 0) + return ret; + + return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg); +} + +static void smsc95xx_mac_update_fullduplex(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + unsigned long flags; + int ret; + + spin_lock_irqsave(&pdata->mac_cr_lock, flags); + if (pdata->phydev->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); + + ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); + if (ret < 0) { + if (ret != -ENODEV) + netdev_warn(dev->net, + "Error updating MAC full duplex mode\n"); + return; + } + + ret = smsc95xx_phy_update_flowcontrol(dev); + if (ret < 0) + netdev_warn(dev->net, "Error updating PHY flow control\n"); +} + +static void smsc95xx_status(struct usbnet *dev, struct urb *urb) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + unsigned long flags; + u32 intdata; + + if (urb->actual_length != 4) { + netdev_warn(dev->net, "unexpected urb length %d\n", + urb->actual_length); + return; + } + + intdata = get_unaligned_le32(urb->transfer_buffer); + netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata); + + local_irq_save(flags); + + if (intdata & INT_ENP_PHY_INT_) + generic_handle_domain_irq(pdata->irqdomain, PHY_HWIRQ); + else + netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n", + intdata); + + local_irq_restore(flags); +} + +/* Enable or disable Tx & Rx checksum offload engines */ +static int smsc95xx_set_features(struct net_device *netdev, + netdev_features_t features) +{ + struct usbnet *dev = netdev_priv(netdev); + u32 read_buf; + int ret; + + ret = smsc95xx_read_reg(dev, COE_CR, &read_buf); + if (ret < 0) + return ret; + + if (features & NETIF_F_IP_CSUM) + read_buf |= Tx_COE_EN_; + else + read_buf &= ~Tx_COE_EN_; + + if (features & NETIF_F_RXCSUM) + read_buf |= Rx_COE_EN_; + else + read_buf &= ~Rx_COE_EN_; + + ret = smsc95xx_write_reg(dev, COE_CR, read_buf); + if (ret < 0) + return ret; + + netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", 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) { + netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n", + ee->magic); + return -EINVAL; + } + + return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data); +} + +static int smsc95xx_ethtool_getregslen(struct net_device *netdev) +{ + /* all smsc95xx registers */ + return COE_CR - ID_REV + sizeof(u32); +} + +static void +smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs, + void *buf) +{ + struct usbnet *dev = netdev_priv(netdev); + unsigned int i, j; + int retval; + u32 *data = buf; + + retval = smsc95xx_read_reg(dev, ID_REV, ®s->version); + if (retval < 0) { + netdev_warn(netdev, "REGS: cannot read ID_REV\n"); + return; + } + + for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) { + retval = smsc95xx_read_reg(dev, i, &data[j]); + if (retval < 0) { + netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i); + return; + } + } +} + +static void smsc95xx_ethtool_get_wol(struct net_device *net, + struct ethtool_wolinfo *wolinfo) +{ + struct usbnet *dev = netdev_priv(net); + struct smsc95xx_priv *pdata = dev->driver_priv; + + wolinfo->supported = SUPPORTED_WAKE; + wolinfo->wolopts = pdata->wolopts; +} + +static int smsc95xx_ethtool_set_wol(struct net_device *net, + struct ethtool_wolinfo *wolinfo) +{ + struct usbnet *dev = netdev_priv(net); + struct smsc95xx_priv *pdata = dev->driver_priv; + int ret; + + if (wolinfo->wolopts & ~SUPPORTED_WAKE) + return -EINVAL; + + pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE; + + ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts); + if (ret < 0) + netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret); + + return ret; +} + +static u32 smsc95xx_get_link(struct net_device *net) +{ + phy_read_status(net->phydev); + return net->phydev->link; +} + +static void smsc95xx_ethtool_get_strings(struct net_device *netdev, u32 sset, + u8 *data) +{ + switch (sset) { + case ETH_SS_TEST: + net_selftest_get_strings(data); + break; + } +} + +static int smsc95xx_ethtool_get_sset_count(struct net_device *ndev, int sset) +{ + switch (sset) { + case ETH_SS_TEST: + return net_selftest_get_count(); + default: + return -EOPNOTSUPP; + } +} + +static const struct ethtool_ops smsc95xx_ethtool_ops = { + .get_link = smsc95xx_get_link, + .nway_reset = phy_ethtool_nway_reset, + .get_drvinfo = usbnet_get_drvinfo, + .get_msglevel = usbnet_get_msglevel, + .set_msglevel = usbnet_set_msglevel, + .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len, + .get_eeprom = smsc95xx_ethtool_get_eeprom, + .set_eeprom = smsc95xx_ethtool_set_eeprom, + .get_regs_len = smsc95xx_ethtool_getregslen, + .get_regs = smsc95xx_ethtool_getregs, + .get_wol = smsc95xx_ethtool_get_wol, + .set_wol = smsc95xx_ethtool_set_wol, + .get_link_ksettings = phy_ethtool_get_link_ksettings, + .set_link_ksettings = phy_ethtool_set_link_ksettings, + .get_ts_info = ethtool_op_get_ts_info, + .self_test = net_selftest, + .get_strings = smsc95xx_ethtool_get_strings, + .get_sset_count = smsc95xx_ethtool_get_sset_count, +}; + +static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) +{ + if (!netif_running(netdev)) + return -EINVAL; + + return phy_mii_ioctl(netdev->phydev, rq, cmd); +} + +static void smsc95xx_init_mac_address(struct usbnet *dev) +{ + u8 addr[ETH_ALEN]; + + /* maybe the boot loader passed the MAC address in devicetree */ + if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) { + if (is_valid_ether_addr(dev->net->dev_addr)) { + /* device tree values are valid so use them */ + netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n"); + return; + } + } + + /* try reading mac address from EEPROM */ + if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) { + eth_hw_addr_set(dev->net, addr); + if (is_valid_ether_addr(dev->net->dev_addr)) { + /* eeprom values are valid so use them */ + netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n"); + return; + } + } + + /* no useful static MAC address found. generate a random one */ + eth_hw_addr_random(dev->net); + netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n"); +} + +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) + return ret; + + return smsc95xx_write_reg(dev, ADDRH, addr_hi); +} + +/* starts the TX path */ +static int smsc95xx_start_tx_path(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + unsigned long flags; + int ret; + + /* 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); + + ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); + if (ret < 0) + return ret; + + /* Enable Tx at SCSRs */ + return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_); +} + +/* Starts the Receive path */ +static int smsc95xx_start_rx_path(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + 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); + + return smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr); +} + +static int smsc95xx_reset(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + u32 read_buf, write_buf, burst_cap; + int ret = 0, timeout; + + netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n"); + + ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_); + if (ret < 0) + return ret; + + timeout = 0; + do { + msleep(10); + ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); + if (ret < 0) + return ret; + timeout++; + } while ((read_buf & HW_CFG_LRST_) && (timeout < 100)); + + if (timeout >= 100) { + netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n"); + return -ETIMEDOUT; + } + + ret = smsc95xx_set_mac_address(dev); + if (ret < 0) + return ret; + + netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n", + dev->net->dev_addr); + + ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); + if (ret < 0) + return ret; + + netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n", + read_buf); + + read_buf |= HW_CFG_BIR_; + + ret = smsc95xx_write_reg(dev, HW_CFG, read_buf); + if (ret < 0) + return ret; + + ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); + if (ret < 0) + return ret; + + netif_dbg(dev, ifup, dev->net, + "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n", + 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; + } + + netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n", + (ulong)dev->rx_urb_size); + + ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap); + if (ret < 0) + return ret; + + ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf); + if (ret < 0) + return ret; + + netif_dbg(dev, ifup, dev->net, + "Read Value from BURST_CAP after writing: 0x%08x\n", + read_buf); + + ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); + if (ret < 0) + return ret; + + ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf); + if (ret < 0) + return ret; + + netif_dbg(dev, ifup, dev->net, + "Read Value from BULK_IN_DLY after writing: 0x%08x\n", + read_buf); + + ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); + if (ret < 0) + return ret; + + netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n", + 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) + return ret; + + ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf); + if (ret < 0) + return ret; + + netif_dbg(dev, ifup, dev->net, + "Read Value from HW_CFG after writing: 0x%08x\n", read_buf); + + ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); + if (ret < 0) + return ret; + + ret = smsc95xx_read_reg(dev, ID_REV, &read_buf); + if (ret < 0) + return ret; + netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf); + + /* Configure GPIO pins as LED outputs */ + write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED | + LED_GPIO_CFG_FDX_LED; + ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf); + if (ret < 0) + return ret; + + /* Init Tx */ + ret = smsc95xx_write_reg(dev, FLOW, 0); + if (ret < 0) + return ret; + + ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT); + if (ret < 0) + return ret; + + /* Don't need mac_cr_lock during initialisation */ + ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr); + if (ret < 0) + return ret; + + /* Init Rx */ + /* Set Vlan */ + ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q); + if (ret < 0) + return ret; + + /* Enable or disable checksum offload engines */ + ret = smsc95xx_set_features(dev->net, dev->net->features); + if (ret < 0) { + netdev_warn(dev->net, "Failed to set checksum offload features\n"); + return ret; + } + + smsc95xx_set_multicast(dev->net); + + ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf); + if (ret < 0) + 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) + return ret; + + ret = smsc95xx_start_tx_path(dev); + if (ret < 0) { + netdev_warn(dev->net, "Failed to start TX path\n"); + return ret; + } + + ret = smsc95xx_start_rx_path(dev); + if (ret < 0) { + netdev_warn(dev->net, "Failed to start RX path\n"); + return ret; + } + + netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n"); + return 0; +} + +static const struct net_device_ops smsc95xx_netdev_ops = { + .ndo_open = usbnet_open, + .ndo_stop = usbnet_stop, + .ndo_start_xmit = usbnet_start_xmit, + .ndo_tx_timeout = usbnet_tx_timeout, + .ndo_change_mtu = usbnet_change_mtu, + .ndo_get_stats64 = dev_get_tstats64, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, + .ndo_eth_ioctl = smsc95xx_ioctl, + .ndo_set_rx_mode = smsc95xx_set_multicast, + .ndo_set_features = smsc95xx_set_features, +}; + +static void smsc95xx_handle_link_change(struct net_device *net) +{ + struct usbnet *dev = netdev_priv(net); + + phy_print_status(net->phydev); + smsc95xx_mac_update_fullduplex(dev); + usbnet_defer_kevent(dev, EVENT_LINK_CHANGE); +} + +static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf) +{ + struct smsc95xx_priv *pdata; + char usb_path[64]; + int ret, phy_irq; + u32 val; + + printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n"); + + ret = usbnet_get_endpoints(dev, intf); + if (ret < 0) { + netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret); + return ret; + } + + pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + + dev->driver_priv = pdata; + + spin_lock_init(&pdata->mac_cr_lock); + + /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff. + * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must + * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero, + * it is transmitted as all ones. The zero transmitted checksum means + * transmitter generated no checksum. Hence, enable csum offload only + * for ipv4 packets. + */ + if (DEFAULT_TX_CSUM_ENABLE) + dev->net->features |= NETIF_F_IP_CSUM; + if (DEFAULT_RX_CSUM_ENABLE) + dev->net->features |= NETIF_F_RXCSUM; + + dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM; + set_bit(EVENT_NO_IP_ALIGN, &dev->flags); + + smsc95xx_init_mac_address(dev); + + /* Init all registers */ + ret = smsc95xx_reset(dev); + if (ret) + goto free_pdata; + + /* create irq domain for use by PHY driver and GPIO consumers */ + usb_make_path(dev->udev, usb_path, sizeof(usb_path)); + pdata->irqfwnode = irq_domain_alloc_named_fwnode(usb_path); + if (!pdata->irqfwnode) { + ret = -ENOMEM; + goto free_pdata; + } + + pdata->irqdomain = irq_domain_create_linear(pdata->irqfwnode, + SMSC95XX_NR_IRQS, + &irq_domain_simple_ops, + pdata); + if (!pdata->irqdomain) { + ret = -ENOMEM; + goto free_irqfwnode; + } + + phy_irq = irq_create_mapping(pdata->irqdomain, PHY_HWIRQ); + if (!phy_irq) { + ret = -ENOENT; + goto remove_irqdomain; + } + + pdata->irqchip = dummy_irq_chip; + pdata->irqchip.name = SMSC_CHIPNAME; + irq_set_chip_and_handler_name(phy_irq, &pdata->irqchip, + handle_simple_irq, "phy"); + + pdata->mdiobus = mdiobus_alloc(); + if (!pdata->mdiobus) { + ret = -ENOMEM; + goto dispose_irq; + } + + ret = smsc95xx_read_reg(dev, HW_CFG, &val); + if (ret < 0) + goto free_mdio; + + pdata->is_internal_phy = !(val & HW_CFG_PSEL_); + if (pdata->is_internal_phy) + pdata->mdiobus->phy_mask = ~(1u << SMSC95XX_INTERNAL_PHY_ID); + + pdata->mdiobus->priv = dev; + pdata->mdiobus->read = smsc95xx_mdiobus_read; + pdata->mdiobus->write = smsc95xx_mdiobus_write; + pdata->mdiobus->reset = smsc95xx_mdiobus_reset; + pdata->mdiobus->name = "smsc95xx-mdiobus"; + pdata->mdiobus->parent = &dev->udev->dev; + + snprintf(pdata->mdiobus->id, ARRAY_SIZE(pdata->mdiobus->id), + "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum); + + ret = mdiobus_register(pdata->mdiobus); + if (ret) { + netdev_err(dev->net, "Could not register MDIO bus\n"); + goto free_mdio; + } + + pdata->phydev = phy_find_first(pdata->mdiobus); + if (!pdata->phydev) { + netdev_err(dev->net, "no PHY found\n"); + ret = -ENODEV; + goto unregister_mdio; + } + + pdata->phydev->irq = phy_irq; + pdata->phydev->is_internal = pdata->is_internal_phy; + + /* detect device revision as different features may be available */ + ret = smsc95xx_read_reg(dev, ID_REV, &val); + if (ret < 0) + goto unregister_mdio; + + val >>= 16; + if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) || + (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_)) + pdata->features = (FEATURE_8_WAKEUP_FILTERS | + FEATURE_PHY_NLP_CROSSOVER | + FEATURE_REMOTE_WAKEUP); + else if (val == ID_REV_CHIP_ID_9512_) + pdata->features = FEATURE_8_WAKEUP_FILTERS; + + dev->net->netdev_ops = &smsc95xx_netdev_ops; + dev->net->ethtool_ops = &smsc95xx_ethtool_ops; + dev->net->flags |= IFF_MULTICAST; + dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM; + dev->net->min_mtu = ETH_MIN_MTU; + dev->net->max_mtu = ETH_DATA_LEN; + dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; + + ret = phy_connect_direct(dev->net, pdata->phydev, + &smsc95xx_handle_link_change, + PHY_INTERFACE_MODE_MII); + if (ret) { + netdev_err(dev->net, "can't attach PHY to %s\n", pdata->mdiobus->id); + goto unregister_mdio; + } + + phy_attached_info(dev->net->phydev); + + return 0; + +unregister_mdio: + mdiobus_unregister(pdata->mdiobus); + +free_mdio: + mdiobus_free(pdata->mdiobus); + +dispose_irq: + irq_dispose_mapping(phy_irq); + +remove_irqdomain: + irq_domain_remove(pdata->irqdomain); + +free_irqfwnode: + irq_domain_free_fwnode(pdata->irqfwnode); + +free_pdata: + kfree(pdata); + return ret; +} + +static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + + phy_disconnect(dev->net->phydev); + mdiobus_unregister(pdata->mdiobus); + mdiobus_free(pdata->mdiobus); + irq_dispose_mapping(irq_find_mapping(pdata->irqdomain, PHY_HWIRQ)); + irq_domain_remove(pdata->irqdomain); + irq_domain_free_fwnode(pdata->irqfwnode); + netif_dbg(dev, ifdown, dev->net, "free pdata\n"); + kfree(pdata); +} + +static int smsc95xx_start_phy(struct usbnet *dev) +{ + phy_start(dev->net->phydev); + + return 0; +} + +static int smsc95xx_stop(struct usbnet *dev) +{ + phy_stop(dev->net->phydev); + + return 0; +} + +static u32 smsc_crc(const u8 *buffer, size_t len, int filter) +{ + u32 crc = bitrev16(crc16(0xFFFF, buffer, len)); + return crc << ((filter % 2) * 16); +} + +static int smsc95xx_link_ok(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + int ret; + + /* first, a dummy read, needed to latch some MII phys */ + ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); + if (ret < 0) + return ret; + + ret = smsc95xx_mdio_read(dev, pdata->phydev->mdio.addr, MII_BMSR); + if (ret < 0) + return ret; + + return !!(ret & BMSR_LSTATUS); +} + +static int smsc95xx_enter_suspend0(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + u32 val; + int ret; + + ret = smsc95xx_read_reg(dev, PM_CTRL, &val); + if (ret < 0) + return ret; + + val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_)); + val |= PM_CTL_SUS_MODE_0; + + ret = smsc95xx_write_reg(dev, PM_CTRL, val); + if (ret < 0) + return ret; + + /* clear wol status */ + val &= ~PM_CTL_WUPS_; + val |= PM_CTL_WUPS_WOL_; + + /* enable energy detection */ + if (pdata->wolopts & WAKE_PHY) + val |= PM_CTL_WUPS_ED_; + + ret = smsc95xx_write_reg(dev, PM_CTRL, val); + if (ret < 0) + return ret; + + /* read back PM_CTRL */ + ret = smsc95xx_read_reg(dev, PM_CTRL, &val); + if (ret < 0) + return ret; + + pdata->suspend_flags |= SUSPEND_SUSPEND0; + + return 0; +} + +static int smsc95xx_enter_suspend1(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + int ret, phy_id = pdata->phydev->mdio.addr; + u32 val; + + /* reconfigure link pulse detection timing for + * compatibility with non-standard link partners + */ + if (pdata->features & FEATURE_PHY_NLP_CROSSOVER) + smsc95xx_mdio_write(dev, phy_id, PHY_EDPD_CONFIG, + PHY_EDPD_CONFIG_DEFAULT); + + /* enable energy detect power-down mode */ + ret = smsc95xx_mdio_read(dev, phy_id, PHY_MODE_CTRL_STS); + if (ret < 0) + return ret; + + ret |= MODE_CTRL_STS_EDPWRDOWN_; + + smsc95xx_mdio_write(dev, phy_id, PHY_MODE_CTRL_STS, ret); + + /* enter SUSPEND1 mode */ + ret = smsc95xx_read_reg(dev, PM_CTRL, &val); + if (ret < 0) + return ret; + + val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); + val |= PM_CTL_SUS_MODE_1; + + ret = smsc95xx_write_reg(dev, PM_CTRL, val); + if (ret < 0) + return ret; + + /* clear wol status, enable energy detection */ + val &= ~PM_CTL_WUPS_; + val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_); + + ret = smsc95xx_write_reg(dev, PM_CTRL, val); + if (ret < 0) + return ret; + + pdata->suspend_flags |= SUSPEND_SUSPEND1; + + return 0; +} + +static int smsc95xx_enter_suspend2(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + u32 val; + int ret; + + ret = smsc95xx_read_reg(dev, PM_CTRL, &val); + if (ret < 0) + return ret; + + val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); + val |= PM_CTL_SUS_MODE_2; + + ret = smsc95xx_write_reg(dev, PM_CTRL, val); + if (ret < 0) + return ret; + + pdata->suspend_flags |= SUSPEND_SUSPEND2; + + return 0; +} + +static int smsc95xx_enter_suspend3(struct usbnet *dev) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + u32 val; + int ret; + + ret = smsc95xx_read_reg(dev, RX_FIFO_INF, &val); + if (ret < 0) + return ret; + + if (val & RX_FIFO_INF_USED_) { + netdev_info(dev->net, "rx fifo not empty in autosuspend\n"); + return -EBUSY; + } + + ret = smsc95xx_read_reg(dev, PM_CTRL, &val); + if (ret < 0) + return ret; + + val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_); + val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS; + + ret = smsc95xx_write_reg(dev, PM_CTRL, val); + if (ret < 0) + return ret; + + /* clear wol status */ + val &= ~PM_CTL_WUPS_; + val |= PM_CTL_WUPS_WOL_; + + ret = smsc95xx_write_reg(dev, PM_CTRL, val); + if (ret < 0) + return ret; + + pdata->suspend_flags |= SUSPEND_SUSPEND3; + + return 0; +} + +static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + + if (!netif_running(dev->net)) { + /* interface is ifconfig down so fully power down hw */ + netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n"); + return smsc95xx_enter_suspend2(dev); + } + + if (!link_up) { + /* link is down so enter EDPD mode, but only if device can + * reliably resume from it. This check should be redundant + * as current FEATURE_REMOTE_WAKEUP parts also support + * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */ + if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) { + netdev_warn(dev->net, "EDPD not supported\n"); + return -EBUSY; + } + + netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n"); + netdev_info(dev->net, "entering SUSPEND1 mode\n"); + return smsc95xx_enter_suspend1(dev); + } + + netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n"); + return smsc95xx_enter_suspend3(dev); +} + +static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct usbnet *dev = usb_get_intfdata(intf); + struct smsc95xx_priv *pdata = dev->driver_priv; + u32 val, link_up; + int ret; + + pdata->pm_task = current; + + ret = usbnet_suspend(intf, message); + if (ret < 0) { + netdev_warn(dev->net, "usbnet_suspend error\n"); + pdata->pm_task = NULL; + return ret; + } + + if (pdata->suspend_flags) { + netdev_warn(dev->net, "error during last resume\n"); + pdata->suspend_flags = 0; + } + + link_up = smsc95xx_link_ok(dev); + + if (message.event == PM_EVENT_AUTO_SUSPEND && + (pdata->features & FEATURE_REMOTE_WAKEUP)) { + ret = smsc95xx_autosuspend(dev, link_up); + goto done; + } + + /* if we get this far we're not autosuspending */ + /* if no wol options set, or if link is down and we're not waking on + * PHY activity, enter lowest power SUSPEND2 mode + */ + if (!(pdata->wolopts & SUPPORTED_WAKE) || + !(link_up || (pdata->wolopts & WAKE_PHY))) { + netdev_info(dev->net, "entering SUSPEND2 mode\n"); + + /* disable energy detect (link up) & wake up events */ + ret = smsc95xx_read_reg(dev, WUCSR, &val); + if (ret < 0) + goto done; + + val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_); + + ret = smsc95xx_write_reg(dev, WUCSR, val); + if (ret < 0) + goto done; + + ret = smsc95xx_read_reg(dev, PM_CTRL, &val); + if (ret < 0) + goto done; + + val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_); + + ret = smsc95xx_write_reg(dev, PM_CTRL, val); + if (ret < 0) + goto done; + + ret = smsc95xx_enter_suspend2(dev); + goto done; + } + + if (pdata->wolopts & WAKE_PHY) { + /* if link is down then configure EDPD and enter SUSPEND1, + * otherwise enter SUSPEND0 below + */ + if (!link_up) { + netdev_info(dev->net, "entering SUSPEND1 mode\n"); + ret = smsc95xx_enter_suspend1(dev); + goto done; + } + } + + if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { + u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL); + u32 command[2]; + u32 offset[2]; + u32 crc[4]; + int wuff_filter_count = + (pdata->features & FEATURE_8_WAKEUP_FILTERS) ? + LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; + int i, filter = 0; + + if (!filter_mask) { + netdev_warn(dev->net, "Unable to allocate filter_mask\n"); + ret = -ENOMEM; + goto done; + } + + memset(command, 0, sizeof(command)); + memset(offset, 0, sizeof(offset)); + memset(crc, 0, sizeof(crc)); + + if (pdata->wolopts & WAKE_BCAST) { + const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; + netdev_info(dev->net, "enabling broadcast detection\n"); + filter_mask[filter * 4] = 0x003F; + filter_mask[filter * 4 + 1] = 0x00; + filter_mask[filter * 4 + 2] = 0x00; + filter_mask[filter * 4 + 3] = 0x00; + command[filter/4] |= 0x05UL << ((filter % 4) * 8); + offset[filter/4] |= 0x00 << ((filter % 4) * 8); + crc[filter/2] |= smsc_crc(bcast, 6, filter); + filter++; + } + + if (pdata->wolopts & WAKE_MCAST) { + const u8 mcast[] = {0x01, 0x00, 0x5E}; + netdev_info(dev->net, "enabling multicast detection\n"); + filter_mask[filter * 4] = 0x0007; + filter_mask[filter * 4 + 1] = 0x00; + filter_mask[filter * 4 + 2] = 0x00; + filter_mask[filter * 4 + 3] = 0x00; + command[filter/4] |= 0x09UL << ((filter % 4) * 8); + offset[filter/4] |= 0x00 << ((filter % 4) * 8); + crc[filter/2] |= smsc_crc(mcast, 3, filter); + filter++; + } + + if (pdata->wolopts & WAKE_ARP) { + const u8 arp[] = {0x08, 0x06}; + netdev_info(dev->net, "enabling ARP detection\n"); + filter_mask[filter * 4] = 0x0003; + filter_mask[filter * 4 + 1] = 0x00; + filter_mask[filter * 4 + 2] = 0x00; + filter_mask[filter * 4 + 3] = 0x00; + command[filter/4] |= 0x05UL << ((filter % 4) * 8); + offset[filter/4] |= 0x0C << ((filter % 4) * 8); + crc[filter/2] |= smsc_crc(arp, 2, filter); + filter++; + } + + if (pdata->wolopts & WAKE_UCAST) { + netdev_info(dev->net, "enabling unicast detection\n"); + filter_mask[filter * 4] = 0x003F; + filter_mask[filter * 4 + 1] = 0x00; + filter_mask[filter * 4 + 2] = 0x00; + filter_mask[filter * 4 + 3] = 0x00; + command[filter/4] |= 0x01UL << ((filter % 4) * 8); + offset[filter/4] |= 0x00 << ((filter % 4) * 8); + crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter); + filter++; + } + + for (i = 0; i < (wuff_filter_count * 4); i++) { + ret = smsc95xx_write_reg(dev, WUFF, filter_mask[i]); + if (ret < 0) { + kfree(filter_mask); + goto done; + } + } + kfree(filter_mask); + + for (i = 0; i < (wuff_filter_count / 4); i++) { + ret = smsc95xx_write_reg(dev, WUFF, command[i]); + if (ret < 0) + goto done; + } + + for (i = 0; i < (wuff_filter_count / 4); i++) { + ret = smsc95xx_write_reg(dev, WUFF, offset[i]); + if (ret < 0) + goto done; + } + + for (i = 0; i < (wuff_filter_count / 2); i++) { + ret = smsc95xx_write_reg(dev, WUFF, crc[i]); + if (ret < 0) + goto done; + } + + /* clear any pending pattern match packet status */ + ret = smsc95xx_read_reg(dev, WUCSR, &val); + if (ret < 0) + goto done; + + val |= WUCSR_WUFR_; + + ret = smsc95xx_write_reg(dev, WUCSR, val); + if (ret < 0) + goto done; + } + + if (pdata->wolopts & WAKE_MAGIC) { + /* clear any pending magic packet status */ + ret = smsc95xx_read_reg(dev, WUCSR, &val); + if (ret < 0) + goto done; + + val |= WUCSR_MPR_; + + ret = smsc95xx_write_reg(dev, WUCSR, val); + if (ret < 0) + goto done; + } + + /* enable/disable wakeup sources */ + ret = smsc95xx_read_reg(dev, WUCSR, &val); + if (ret < 0) + goto done; + + if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { + netdev_info(dev->net, "enabling pattern match wakeup\n"); + val |= WUCSR_WAKE_EN_; + } else { + netdev_info(dev->net, "disabling pattern match wakeup\n"); + val &= ~WUCSR_WAKE_EN_; + } + + if (pdata->wolopts & WAKE_MAGIC) { + netdev_info(dev->net, "enabling magic packet wakeup\n"); + val |= WUCSR_MPEN_; + } else { + netdev_info(dev->net, "disabling magic packet wakeup\n"); + val &= ~WUCSR_MPEN_; + } + + ret = smsc95xx_write_reg(dev, WUCSR, val); + if (ret < 0) + goto done; + + /* enable wol wakeup source */ + ret = smsc95xx_read_reg(dev, PM_CTRL, &val); + if (ret < 0) + goto done; + + val |= PM_CTL_WOL_EN_; + + /* phy energy detect wakeup source */ + if (pdata->wolopts & WAKE_PHY) + val |= PM_CTL_ED_EN_; + + ret = smsc95xx_write_reg(dev, PM_CTRL, val); + if (ret < 0) + goto done; + + /* enable receiver to enable frame reception */ + smsc95xx_start_rx_path(dev); + + /* some wol options are enabled, so enter SUSPEND0 */ + netdev_info(dev->net, "entering SUSPEND0 mode\n"); + ret = smsc95xx_enter_suspend0(dev); + +done: + /* + * TODO: resume() might need to handle the suspend failure + * in system sleep + */ + if (ret && PMSG_IS_AUTO(message)) + usbnet_resume(intf); + + pdata->pm_task = NULL; + return ret; +} + +static int smsc95xx_resume(struct usb_interface *intf) +{ + struct usbnet *dev = usb_get_intfdata(intf); + struct smsc95xx_priv *pdata; + u8 suspend_flags; + int ret; + u32 val; + + BUG_ON(!dev); + pdata = dev->driver_priv; + suspend_flags = pdata->suspend_flags; + + netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags); + + /* do this first to ensure it's cleared even in error case */ + pdata->suspend_flags = 0; + + pdata->pm_task = current; + + if (suspend_flags & SUSPEND_ALLMODES) { + /* clear wake-up sources */ + ret = smsc95xx_read_reg(dev, WUCSR, &val); + if (ret < 0) + goto done; + + val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_); + + ret = smsc95xx_write_reg(dev, WUCSR, val); + if (ret < 0) + goto done; + + /* clear wake-up status */ + ret = smsc95xx_read_reg(dev, PM_CTRL, &val); + if (ret < 0) + goto done; + + val &= ~PM_CTL_WOL_EN_; + val |= PM_CTL_WUPS_; + + ret = smsc95xx_write_reg(dev, PM_CTRL, val); + if (ret < 0) + goto done; + } + + phy_init_hw(pdata->phydev); + + ret = usbnet_resume(intf); + if (ret < 0) + netdev_warn(dev->net, "usbnet_resume error\n"); + +done: + pdata->pm_task = NULL; + return ret; +} + +static int smsc95xx_reset_resume(struct usb_interface *intf) +{ + struct usbnet *dev = usb_get_intfdata(intf); + struct smsc95xx_priv *pdata = dev->driver_priv; + int ret; + + pdata->pm_task = current; + ret = smsc95xx_reset(dev); + pdata->pm_task = NULL; + if (ret < 0) + return ret; + + return smsc95xx_resume(intf); +} + +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) +{ + /* This check is no longer done by usbnet */ + if (skb->len < dev->net->hard_header_len) + return 0; + + while (skb->len > 0) { + u32 header, align_count; + struct sk_buff *ax_skb; + unsigned char *packet; + u16 size; + + header = get_unaligned_le32(skb->data); + 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(size > skb->len)) { + netif_dbg(dev, rx_err, dev->net, + "size err header=0x%08x\n", header); + return 0; + } + + if (unlikely(header & RX_STS_ES_)) { + netif_dbg(dev, rx_err, dev->net, + "Error header=0x%08x\n", header); + dev->net->stats.rx_errors++; + dev->net->stats.rx_dropped++; + + if (header & RX_STS_CRC_) { + dev->net->stats.rx_crc_errors++; + } else { + if (header & (RX_STS_TL_ | RX_STS_RF_)) + dev->net->stats.rx_frame_errors++; + + if ((header & RX_STS_LE_) && + (!(header & RX_STS_FT_))) + dev->net->stats.rx_length_errors++; + } + } else { + /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */ + if (unlikely(size > (ETH_FRAME_LEN + 12))) { + netif_dbg(dev, rx_err, dev->net, + "size err header=0x%08x\n", header); + return 0; + } + + /* last frame in this batch */ + if (skb->len == size) { + if (dev->net->features & NETIF_F_RXCSUM) + smsc95xx_rx_csum_offload(skb); + skb_trim(skb, skb->len - 4); /* remove fcs */ + skb->truesize = size + sizeof(struct sk_buff); + + return 1; + } + + ax_skb = skb_clone(skb, GFP_ATOMIC); + if (unlikely(!ax_skb)) { + netdev_warn(dev->net, "Error allocating skb\n"); + return 0; + } + + ax_skb->len = size; + ax_skb->data = packet; + skb_set_tail_pointer(ax_skb, size); + + if (dev->net->features & NETIF_F_RXCSUM) + smsc95xx_rx_csum_offload(ax_skb); + skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */ + 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); + } + + return 1; +} + +static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb) +{ + u16 low_16 = (u16)skb_checksum_start_offset(skb); + u16 high_16 = low_16 + skb->csum_offset; + return (high_16 << 16) | low_16; +} + +/* The TX CSUM won't work if the checksum lies in the last 4 bytes of the + * transmission. This is fairly unlikely, only seems to trigger with some + * short TCP ACK packets sent. + * + * Note, this calculation should probably check for the alignment of the + * data as well, but a straight check for csum being in the last four bytes + * of the packet should be ok for now. + */ +static bool smsc95xx_can_tx_checksum(struct sk_buff *skb) +{ + unsigned int len = skb->len - skb_checksum_start_offset(skb); + + if (skb->len <= 45) + return false; + return skb->csum_offset < (len - (4 + 1)); +} + +static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev, + struct sk_buff *skb, gfp_t flags) +{ + bool csum = skb->ip_summed == CHECKSUM_PARTIAL; + int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD; + u32 tx_cmd_a, tx_cmd_b; + void *ptr; + + /* We do not advertise SG, so skbs should be already linearized */ + BUG_ON(skb_shinfo(skb)->nr_frags); + + /* Make writable and expand header space by overhead if required */ + if (skb_cow_head(skb, overhead)) { + /* Must deallocate here as returning NULL to indicate error + * means the skb won't be deallocated in the caller. + */ + dev_kfree_skb_any(skb); + return NULL; + } + + tx_cmd_b = (u32)skb->len; + tx_cmd_a = tx_cmd_b | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_; + + if (csum) { + if (!smsc95xx_can_tx_checksum(skb)) { + /* workaround - hardware tx checksum does not work + * properly with extremely small packets */ + long csstart = skb_checksum_start_offset(skb); + __wsum calc = csum_partial(skb->data + csstart, + skb->len - csstart, 0); + *((__sum16 *)(skb->data + csstart + + skb->csum_offset)) = csum_fold(calc); + + csum = false; + } else { + u32 csum_preamble = smsc95xx_calc_csum_preamble(skb); + ptr = skb_push(skb, 4); + put_unaligned_le32(csum_preamble, ptr); + + tx_cmd_a += 4; + tx_cmd_b += 4; + tx_cmd_b |= TX_CMD_B_CSUM_ENABLE; + } + } + + ptr = skb_push(skb, 8); + put_unaligned_le32(tx_cmd_a, ptr); + put_unaligned_le32(tx_cmd_b, ptr+4); + + return skb; +} + +static int smsc95xx_manage_power(struct usbnet *dev, int on) +{ + struct smsc95xx_priv *pdata = dev->driver_priv; + + dev->intf->needs_remote_wakeup = on; + + if (pdata->features & FEATURE_REMOTE_WAKEUP) + return 0; + + /* this chip revision isn't capable of remote wakeup */ + netdev_info(dev->net, "hardware isn't capable of remote wakeup\n"); + + if (on) + usb_autopm_get_interface_no_resume(dev->intf); + else + usb_autopm_put_interface(dev->intf); + + return 0; +} + +static const struct driver_info smsc95xx_info = { + .description = "smsc95xx USB 2.0 Ethernet", + .bind = smsc95xx_bind, + .unbind = smsc95xx_unbind, + .reset = smsc95xx_reset, + .check_connect = smsc95xx_start_phy, + .stop = smsc95xx_stop, + .rx_fixup = smsc95xx_rx_fixup, + .tx_fixup = smsc95xx_tx_fixup, + .status = smsc95xx_status, + .manage_power = smsc95xx_manage_power, + .flags = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR, +}; + +static const struct usb_device_id products[] = { + { + /* SMSC9500 USB Ethernet Device */ + USB_DEVICE(0x0424, 0x9500), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9505 USB Ethernet Device */ + USB_DEVICE(0x0424, 0x9505), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9500A USB Ethernet Device */ + USB_DEVICE(0x0424, 0x9E00), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9505A USB Ethernet Device */ + USB_DEVICE(0x0424, 0x9E01), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9512/9514 USB Hub & Ethernet Device */ + USB_DEVICE(0x0424, 0xec00), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9500 USB Ethernet Device (SAL10) */ + USB_DEVICE(0x0424, 0x9900), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9505 USB Ethernet Device (SAL10) */ + USB_DEVICE(0x0424, 0x9901), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9500A USB Ethernet Device (SAL10) */ + USB_DEVICE(0x0424, 0x9902), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9505A USB Ethernet Device (SAL10) */ + USB_DEVICE(0x0424, 0x9903), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */ + USB_DEVICE(0x0424, 0x9904), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9500A USB Ethernet Device (HAL) */ + USB_DEVICE(0x0424, 0x9905), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9505A USB Ethernet Device (HAL) */ + USB_DEVICE(0x0424, 0x9906), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9500 USB Ethernet Device (Alternate ID) */ + USB_DEVICE(0x0424, 0x9907), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9500A USB Ethernet Device (Alternate ID) */ + USB_DEVICE(0x0424, 0x9908), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */ + USB_DEVICE(0x0424, 0x9909), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC LAN9530 USB Ethernet Device */ + USB_DEVICE(0x0424, 0x9530), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC LAN9730 USB Ethernet Device */ + USB_DEVICE(0x0424, 0x9730), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* SMSC LAN89530 USB Ethernet Device */ + USB_DEVICE(0x0424, 0x9E08), + .driver_info = (unsigned long) &smsc95xx_info, + }, + { + /* Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet Device */ + USB_DEVICE(0x184F, 0x0051), + .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 = smsc95xx_suspend, + .resume = smsc95xx_resume, + .reset_resume = smsc95xx_reset_resume, + .disconnect = usbnet_disconnect, + .disable_hub_initiated_lpm = 1, + .supports_autosuspend = 1, +}; + +module_usb_driver(smsc95xx_driver); + +MODULE_AUTHOR("Nancy Lin"); +MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>"); +MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices"); +MODULE_LICENSE("GPL"); |