diff options
Diffstat (limited to 'drivers/net/usb/lan78xx.c')
| -rw-r--r-- | drivers/net/usb/lan78xx.c | 3494 |
1 files changed, 3494 insertions, 0 deletions
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c new file mode 100644 index 000000000000..a39518fc93aa --- /dev/null +++ b/drivers/net/usb/lan78xx.c @@ -0,0 +1,3494 @@ +/* + * Copyright (C) 2015 Microchip Technology + * + * 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, see <http://www.gnu.org/licenses/>. + */ +#include <linux/version.h> +#include <linux/module.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/signal.h> +#include <linux/slab.h> +#include <linux/if_vlan.h> +#include <linux/uaccess.h> +#include <linux/list.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/mdio.h> +#include <net/ip6_checksum.h> +#include "lan78xx.h" + +#define DRIVER_AUTHOR "WOOJUNG HUH <woojung.huh@microchip.com>" +#define DRIVER_DESC "LAN78XX USB 3.0 Gigabit Ethernet Devices" +#define DRIVER_NAME "lan78xx" +#define DRIVER_VERSION "1.0.0" + +#define TX_TIMEOUT_JIFFIES (5 * HZ) +#define THROTTLE_JIFFIES (HZ / 8) +#define UNLINK_TIMEOUT_MS 3 + +#define RX_MAX_QUEUE_MEMORY (60 * 1518) + +#define SS_USB_PKT_SIZE (1024) +#define HS_USB_PKT_SIZE (512) +#define FS_USB_PKT_SIZE (64) + +#define MAX_RX_FIFO_SIZE (12 * 1024) +#define MAX_TX_FIFO_SIZE (12 * 1024) +#define DEFAULT_BURST_CAP_SIZE (MAX_TX_FIFO_SIZE) +#define DEFAULT_BULK_IN_DELAY (0x0800) +#define MAX_SINGLE_PACKET_SIZE (9000) +#define DEFAULT_TX_CSUM_ENABLE (true) +#define DEFAULT_RX_CSUM_ENABLE (true) +#define DEFAULT_TSO_CSUM_ENABLE (true) +#define DEFAULT_VLAN_FILTER_ENABLE (true) +#define INTERNAL_PHY_ID (2) /* 2: GMII */ +#define TX_OVERHEAD (8) +#define RXW_PADDING 2 + +#define LAN78XX_USB_VENDOR_ID (0x0424) +#define LAN7800_USB_PRODUCT_ID (0x7800) +#define LAN7850_USB_PRODUCT_ID (0x7850) +#define LAN78XX_EEPROM_MAGIC (0x78A5) +#define LAN78XX_OTP_MAGIC (0x78F3) + +#define MII_READ 1 +#define MII_WRITE 0 + +#define EEPROM_INDICATOR (0xA5) +#define EEPROM_MAC_OFFSET (0x01) +#define MAX_EEPROM_SIZE 512 +#define OTP_INDICATOR_1 (0xF3) +#define OTP_INDICATOR_2 (0xF7) + +#define WAKE_ALL (WAKE_PHY | WAKE_UCAST | \ + WAKE_MCAST | WAKE_BCAST | \ + WAKE_ARP | WAKE_MAGIC) + +/* USB related defines */ +#define BULK_IN_PIPE 1 +#define BULK_OUT_PIPE 2 + +/* default autosuspend delay (mSec)*/ +#define DEFAULT_AUTOSUSPEND_DELAY (10 * 1000) + +static const char lan78xx_gstrings[][ETH_GSTRING_LEN] = { + "RX FCS Errors", + "RX Alignment Errors", + "Rx Fragment Errors", + "RX Jabber Errors", + "RX Undersize Frame Errors", + "RX Oversize Frame Errors", + "RX Dropped Frames", + "RX Unicast Byte Count", + "RX Broadcast Byte Count", + "RX Multicast Byte Count", + "RX Unicast Frames", + "RX Broadcast Frames", + "RX Multicast Frames", + "RX Pause Frames", + "RX 64 Byte Frames", + "RX 65 - 127 Byte Frames", + "RX 128 - 255 Byte Frames", + "RX 256 - 511 Bytes Frames", + "RX 512 - 1023 Byte Frames", + "RX 1024 - 1518 Byte Frames", + "RX Greater 1518 Byte Frames", + "EEE RX LPI Transitions", + "EEE RX LPI Time", + "TX FCS Errors", + "TX Excess Deferral Errors", + "TX Carrier Errors", + "TX Bad Byte Count", + "TX Single Collisions", + "TX Multiple Collisions", + "TX Excessive Collision", + "TX Late Collisions", + "TX Unicast Byte Count", + "TX Broadcast Byte Count", + "TX Multicast Byte Count", + "TX Unicast Frames", + "TX Broadcast Frames", + "TX Multicast Frames", + "TX Pause Frames", + "TX 64 Byte Frames", + "TX 65 - 127 Byte Frames", + "TX 128 - 255 Byte Frames", + "TX 256 - 511 Bytes Frames", + "TX 512 - 1023 Byte Frames", + "TX 1024 - 1518 Byte Frames", + "TX Greater 1518 Byte Frames", + "EEE TX LPI Transitions", + "EEE TX LPI Time", +}; + +struct lan78xx_statstage { + u32 rx_fcs_errors; + u32 rx_alignment_errors; + u32 rx_fragment_errors; + u32 rx_jabber_errors; + u32 rx_undersize_frame_errors; + u32 rx_oversize_frame_errors; + u32 rx_dropped_frames; + u32 rx_unicast_byte_count; + u32 rx_broadcast_byte_count; + u32 rx_multicast_byte_count; + u32 rx_unicast_frames; + u32 rx_broadcast_frames; + u32 rx_multicast_frames; + u32 rx_pause_frames; + u32 rx_64_byte_frames; + u32 rx_65_127_byte_frames; + u32 rx_128_255_byte_frames; + u32 rx_256_511_bytes_frames; + u32 rx_512_1023_byte_frames; + u32 rx_1024_1518_byte_frames; + u32 rx_greater_1518_byte_frames; + u32 eee_rx_lpi_transitions; + u32 eee_rx_lpi_time; + u32 tx_fcs_errors; + u32 tx_excess_deferral_errors; + u32 tx_carrier_errors; + u32 tx_bad_byte_count; + u32 tx_single_collisions; + u32 tx_multiple_collisions; + u32 tx_excessive_collision; + u32 tx_late_collisions; + u32 tx_unicast_byte_count; + u32 tx_broadcast_byte_count; + u32 tx_multicast_byte_count; + u32 tx_unicast_frames; + u32 tx_broadcast_frames; + u32 tx_multicast_frames; + u32 tx_pause_frames; + u32 tx_64_byte_frames; + u32 tx_65_127_byte_frames; + u32 tx_128_255_byte_frames; + u32 tx_256_511_bytes_frames; + u32 tx_512_1023_byte_frames; + u32 tx_1024_1518_byte_frames; + u32 tx_greater_1518_byte_frames; + u32 eee_tx_lpi_transitions; + u32 eee_tx_lpi_time; +}; + +struct lan78xx_net; + +struct lan78xx_priv { + struct lan78xx_net *dev; + u32 rfe_ctl; + u32 mchash_table[DP_SEL_VHF_HASH_LEN]; /* multicat hash table */ + u32 pfilter_table[NUM_OF_MAF][2]; /* perfect filter table */ + u32 vlan_table[DP_SEL_VHF_VLAN_LEN]; + struct mutex dataport_mutex; /* for dataport access */ + spinlock_t rfe_ctl_lock; /* for rfe register access */ + struct work_struct set_multicast; + struct work_struct set_vlan; + u32 wol; +}; + +enum skb_state { + illegal = 0, + tx_start, + tx_done, + rx_start, + rx_done, + rx_cleanup, + unlink_start +}; + +struct skb_data { /* skb->cb is one of these */ + struct urb *urb; + struct lan78xx_net *dev; + enum skb_state state; + size_t length; +}; + +struct usb_context { + struct usb_ctrlrequest req; + struct lan78xx_net *dev; +}; + +#define EVENT_TX_HALT 0 +#define EVENT_RX_HALT 1 +#define EVENT_RX_MEMORY 2 +#define EVENT_STS_SPLIT 3 +#define EVENT_LINK_RESET 4 +#define EVENT_RX_PAUSED 5 +#define EVENT_DEV_WAKING 6 +#define EVENT_DEV_ASLEEP 7 +#define EVENT_DEV_OPEN 8 + +struct lan78xx_net { + struct net_device *net; + struct usb_device *udev; + struct usb_interface *intf; + void *driver_priv; + + int rx_qlen; + int tx_qlen; + struct sk_buff_head rxq; + struct sk_buff_head txq; + struct sk_buff_head done; + struct sk_buff_head rxq_pause; + struct sk_buff_head txq_pend; + + struct tasklet_struct bh; + struct delayed_work wq; + + struct usb_host_endpoint *ep_blkin; + struct usb_host_endpoint *ep_blkout; + struct usb_host_endpoint *ep_intr; + + int msg_enable; + + struct urb *urb_intr; + struct usb_anchor deferred; + + struct mutex phy_mutex; /* for phy access */ + unsigned pipe_in, pipe_out, pipe_intr; + + u32 hard_mtu; /* count any extra framing */ + size_t rx_urb_size; /* size for rx urbs */ + + unsigned long flags; + + wait_queue_head_t *wait; + unsigned char suspend_count; + + unsigned maxpacket; + struct timer_list delay; + + unsigned long data[5]; + struct mii_if_info mii; + + int link_on; + u8 mdix_ctrl; +}; + +/* use ethtool to change the level for any given device */ +static int msg_level = -1; +module_param(msg_level, int, 0); +MODULE_PARM_DESC(msg_level, "Override default message level"); + +static int lan78xx_read_reg(struct lan78xx_net *dev, u32 index, u32 *data) +{ + u32 *buf = kmalloc(sizeof(u32), GFP_KERNEL); + int ret; + + 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, + 0, index, buf, 4, USB_CTRL_GET_TIMEOUT); + if (likely(ret >= 0)) { + le32_to_cpus(buf); + *data = *buf; + } else { + netdev_warn(dev->net, + "Failed to read register index 0x%08x. ret = %d", + index, ret); + } + + kfree(buf); + + return ret; +} + +static int lan78xx_write_reg(struct lan78xx_net *dev, u32 index, u32 data) +{ + u32 *buf = kmalloc(sizeof(u32), GFP_KERNEL); + int ret; + + 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, + 0, index, buf, 4, USB_CTRL_SET_TIMEOUT); + if (unlikely(ret < 0)) { + netdev_warn(dev->net, + "Failed to write register index 0x%08x. ret = %d", + index, ret); + } + + kfree(buf); + + return ret; +} + +static int lan78xx_read_stats(struct lan78xx_net *dev, + struct lan78xx_statstage *data) +{ + int ret = 0; + int i; + struct lan78xx_statstage *stats; + u32 *src; + u32 *dst; + + stats = kmalloc(sizeof(*stats), GFP_KERNEL); + if (!stats) + return -ENOMEM; + + ret = usb_control_msg(dev->udev, + usb_rcvctrlpipe(dev->udev, 0), + USB_VENDOR_REQUEST_GET_STATS, + USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, + 0, + 0, + (void *)stats, + sizeof(*stats), + USB_CTRL_SET_TIMEOUT); + if (likely(ret >= 0)) { + src = (u32 *)stats; + dst = (u32 *)data; + for (i = 0; i < sizeof(*stats)/sizeof(u32); i++) { + le32_to_cpus(&src[i]); + dst[i] = src[i]; + } + } else { + netdev_warn(dev->net, + "Failed to read stat ret = 0x%x", ret); + } + + kfree(stats); + + return ret; +} + +/* Loop until the read is completed with timeout called with phy_mutex held */ +static int lan78xx_phy_wait_not_busy(struct lan78xx_net *dev) +{ + unsigned long start_time = jiffies; + u32 val; + int ret; + + do { + ret = lan78xx_read_reg(dev, MII_ACC, &val); + if (unlikely(ret < 0)) + return -EIO; + + if (!(val & MII_ACC_MII_BUSY_)) + return 0; + } while (!time_after(jiffies, start_time + HZ)); + + return -EIO; +} + +static inline u32 mii_access(int id, int index, int read) +{ + u32 ret; + + ret = ((u32)id << MII_ACC_PHY_ADDR_SHIFT_) & MII_ACC_PHY_ADDR_MASK_; + ret |= ((u32)index << MII_ACC_MIIRINDA_SHIFT_) & MII_ACC_MIIRINDA_MASK_; + if (read) + ret |= MII_ACC_MII_READ_; + else + ret |= MII_ACC_MII_WRITE_; + ret |= MII_ACC_MII_BUSY_; + + return ret; +} + +static int lan78xx_mdio_read(struct net_device *netdev, int phy_id, int idx) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + u32 val, addr; + int ret; + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + return ret; + + mutex_lock(&dev->phy_mutex); + + /* confirm MII not busy */ + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + /* set the address, index & direction (read from PHY) */ + phy_id &= dev->mii.phy_id_mask; + idx &= dev->mii.reg_num_mask; + addr = mii_access(phy_id, idx, MII_READ); + ret = lan78xx_write_reg(dev, MII_ACC, addr); + + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + ret = lan78xx_read_reg(dev, MII_DATA, &val); + + ret = (int)(val & 0xFFFF); + +done: + mutex_unlock(&dev->phy_mutex); + usb_autopm_put_interface(dev->intf); + return ret; +} + +static void lan78xx_mdio_write(struct net_device *netdev, int phy_id, + int idx, int regval) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + u32 val, addr; + int ret; + + if (usb_autopm_get_interface(dev->intf) < 0) + return; + + mutex_lock(&dev->phy_mutex); + + /* confirm MII not busy */ + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + val = regval; + ret = lan78xx_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 = mii_access(phy_id, idx, MII_WRITE); + ret = lan78xx_write_reg(dev, MII_ACC, addr); + + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + +done: + mutex_unlock(&dev->phy_mutex); + usb_autopm_put_interface(dev->intf); +} + +static void lan78xx_mmd_write(struct net_device *netdev, int phy_id, + int mmddev, int mmdidx, int regval) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + u32 val, addr; + int ret; + + if (usb_autopm_get_interface(dev->intf) < 0) + return; + + mutex_lock(&dev->phy_mutex); + + /* confirm MII not busy */ + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + mmddev &= 0x1F; + + /* set up device address for MMD */ + ret = lan78xx_write_reg(dev, MII_DATA, mmddev); + + phy_id &= dev->mii.phy_id_mask; + addr = mii_access(phy_id, PHY_MMD_CTL, MII_WRITE); + ret = lan78xx_write_reg(dev, MII_ACC, addr); + + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + /* select register of MMD */ + val = mmdidx; + ret = lan78xx_write_reg(dev, MII_DATA, val); + + phy_id &= dev->mii.phy_id_mask; + addr = mii_access(phy_id, PHY_MMD_REG_DATA, MII_WRITE); + ret = lan78xx_write_reg(dev, MII_ACC, addr); + + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + /* select register data for MMD */ + val = PHY_MMD_CTRL_OP_DNI_ | mmddev; + ret = lan78xx_write_reg(dev, MII_DATA, val); + + phy_id &= dev->mii.phy_id_mask; + addr = mii_access(phy_id, PHY_MMD_CTL, MII_WRITE); + ret = lan78xx_write_reg(dev, MII_ACC, addr); + + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + /* write to MMD */ + val = regval; + ret = lan78xx_write_reg(dev, MII_DATA, val); + + phy_id &= dev->mii.phy_id_mask; + addr = mii_access(phy_id, PHY_MMD_REG_DATA, MII_WRITE); + ret = lan78xx_write_reg(dev, MII_ACC, addr); + + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + +done: + mutex_unlock(&dev->phy_mutex); + usb_autopm_put_interface(dev->intf); +} + +static int lan78xx_mmd_read(struct net_device *netdev, int phy_id, + int mmddev, int mmdidx) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + u32 val, addr; + int ret; + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + return ret; + + mutex_lock(&dev->phy_mutex); + + /* confirm MII not busy */ + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + /* set up device address for MMD */ + ret = lan78xx_write_reg(dev, MII_DATA, mmddev); + + phy_id &= dev->mii.phy_id_mask; + addr = mii_access(phy_id, PHY_MMD_CTL, MII_WRITE); + ret = lan78xx_write_reg(dev, MII_ACC, addr); + + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + /* select register of MMD */ + val = mmdidx; + ret = lan78xx_write_reg(dev, MII_DATA, val); + + phy_id &= dev->mii.phy_id_mask; + addr = mii_access(phy_id, PHY_MMD_REG_DATA, MII_WRITE); + ret = lan78xx_write_reg(dev, MII_ACC, addr); + + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + /* select register data for MMD */ + val = PHY_MMD_CTRL_OP_DNI_ | mmddev; + ret = lan78xx_write_reg(dev, MII_DATA, val); + + phy_id &= dev->mii.phy_id_mask; + addr = mii_access(phy_id, PHY_MMD_CTL, MII_WRITE); + ret = lan78xx_write_reg(dev, MII_ACC, addr); + + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + /* set the address, index & direction (read from PHY) */ + phy_id &= dev->mii.phy_id_mask; + addr = mii_access(phy_id, PHY_MMD_REG_DATA, MII_READ); + ret = lan78xx_write_reg(dev, MII_ACC, addr); + + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + /* read from MMD */ + ret = lan78xx_read_reg(dev, MII_DATA, &val); + + ret = (int)(val & 0xFFFF); + +done: + mutex_unlock(&dev->phy_mutex); + usb_autopm_put_interface(dev->intf); + return ret; +} + +static int lan78xx_wait_eeprom(struct lan78xx_net *dev) +{ + unsigned long start_time = jiffies; + u32 val; + int ret; + + do { + ret = lan78xx_read_reg(dev, E2P_CMD, &val); + if (unlikely(ret < 0)) + return -EIO; + + if (!(val & E2P_CMD_EPC_BUSY_) || + (val & E2P_CMD_EPC_TIMEOUT_)) + break; + usleep_range(40, 100); + } while (!time_after(jiffies, start_time + HZ)); + + if (val & (E2P_CMD_EPC_TIMEOUT_ | E2P_CMD_EPC_BUSY_)) { + netdev_warn(dev->net, "EEPROM read operation timeout"); + return -EIO; + } + + return 0; +} + +static int lan78xx_eeprom_confirm_not_busy(struct lan78xx_net *dev) +{ + unsigned long start_time = jiffies; + u32 val; + int ret; + + do { + ret = lan78xx_read_reg(dev, E2P_CMD, &val); + if (unlikely(ret < 0)) + return -EIO; + + if (!(val & E2P_CMD_EPC_BUSY_)) + return 0; + + usleep_range(40, 100); + } while (!time_after(jiffies, start_time + HZ)); + + netdev_warn(dev->net, "EEPROM is busy"); + return -EIO; +} + +static int lan78xx_read_raw_eeprom(struct lan78xx_net *dev, u32 offset, + u32 length, u8 *data) +{ + u32 val; + int i, ret; + + ret = lan78xx_eeprom_confirm_not_busy(dev); + if (ret) + return ret; + + for (i = 0; i < length; i++) { + val = E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_READ_; + val |= (offset & E2P_CMD_EPC_ADDR_MASK_); + ret = lan78xx_write_reg(dev, E2P_CMD, val); + if (unlikely(ret < 0)) + return -EIO; + + ret = lan78xx_wait_eeprom(dev); + if (ret < 0) + return ret; + + ret = lan78xx_read_reg(dev, E2P_DATA, &val); + if (unlikely(ret < 0)) + return -EIO; + + data[i] = val & 0xFF; + offset++; + } + + return 0; +} + +static int lan78xx_read_eeprom(struct lan78xx_net *dev, u32 offset, + u32 length, u8 *data) +{ + u8 sig; + int ret; + + ret = lan78xx_read_raw_eeprom(dev, 0, 1, &sig); + if ((ret == 0) && (sig == EEPROM_INDICATOR)) + ret = lan78xx_read_raw_eeprom(dev, offset, length, data); + else + ret = -EINVAL; + + return ret; +} + +static int lan78xx_write_raw_eeprom(struct lan78xx_net *dev, u32 offset, + u32 length, u8 *data) +{ + u32 val; + int i, ret; + + ret = lan78xx_eeprom_confirm_not_busy(dev); + if (ret) + return ret; + + /* Issue write/erase enable command */ + val = E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_EWEN_; + ret = lan78xx_write_reg(dev, E2P_CMD, val); + if (unlikely(ret < 0)) + return -EIO; + + ret = lan78xx_wait_eeprom(dev); + if (ret < 0) + return ret; + + for (i = 0; i < length; i++) { + /* Fill data register */ + val = data[i]; + ret = lan78xx_write_reg(dev, E2P_DATA, val); + if (ret < 0) + return ret; + + /* Send "write" command */ + val = E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_WRITE_; + val |= (offset & E2P_CMD_EPC_ADDR_MASK_); + ret = lan78xx_write_reg(dev, E2P_CMD, val); + if (ret < 0) + return ret; + + ret = lan78xx_wait_eeprom(dev); + if (ret < 0) + return ret; + + offset++; + } + + return 0; +} + +static int lan78xx_read_raw_otp(struct lan78xx_net *dev, u32 offset, + u32 length, u8 *data) +{ + int i; + int ret; + u32 buf; + unsigned long timeout; + + ret = lan78xx_read_reg(dev, OTP_PWR_DN, &buf); + + if (buf & OTP_PWR_DN_PWRDN_N_) { + /* clear it and wait to be cleared */ + ret = lan78xx_write_reg(dev, OTP_PWR_DN, 0); + + timeout = jiffies + HZ; + do { + usleep_range(1, 10); + ret = lan78xx_read_reg(dev, OTP_PWR_DN, &buf); + if (time_after(jiffies, timeout)) { + netdev_warn(dev->net, + "timeout on OTP_PWR_DN"); + return -EIO; + } + } while (buf & OTP_PWR_DN_PWRDN_N_); + } + + for (i = 0; i < length; i++) { + ret = lan78xx_write_reg(dev, OTP_ADDR1, + ((offset + i) >> 8) & OTP_ADDR1_15_11); + ret = lan78xx_write_reg(dev, OTP_ADDR2, + ((offset + i) & OTP_ADDR2_10_3)); + + ret = lan78xx_write_reg(dev, OTP_FUNC_CMD, OTP_FUNC_CMD_READ_); + ret = lan78xx_write_reg(dev, OTP_CMD_GO, OTP_CMD_GO_GO_); + + timeout = jiffies + HZ; + do { + udelay(1); + ret = lan78xx_read_reg(dev, OTP_STATUS, &buf); + if (time_after(jiffies, timeout)) { + netdev_warn(dev->net, + "timeout on OTP_STATUS"); + return -EIO; + } + } while (buf & OTP_STATUS_BUSY_); + + ret = lan78xx_read_reg(dev, OTP_RD_DATA, &buf); + + data[i] = (u8)(buf & 0xFF); + } + + return 0; +} + +static int lan78xx_read_otp(struct lan78xx_net *dev, u32 offset, + u32 length, u8 *data) +{ + u8 sig; + int ret; + + ret = lan78xx_read_raw_otp(dev, 0, 1, &sig); + + if (ret == 0) { + if (sig == OTP_INDICATOR_1) + offset = offset; + else if (sig == OTP_INDICATOR_2) + offset += 0x100; + else + ret = -EINVAL; + ret = lan78xx_read_raw_otp(dev, offset, length, data); + } + + return ret; +} + +static int lan78xx_dataport_wait_not_busy(struct lan78xx_net *dev) +{ + int i, ret; + + for (i = 0; i < 100; i++) { + u32 dp_sel; + + ret = lan78xx_read_reg(dev, DP_SEL, &dp_sel); + if (unlikely(ret < 0)) + return -EIO; + + if (dp_sel & DP_SEL_DPRDY_) + return 0; + + usleep_range(40, 100); + } + + netdev_warn(dev->net, "lan78xx_dataport_wait_not_busy timed out"); + + return -EIO; +} + +static int lan78xx_dataport_write(struct lan78xx_net *dev, u32 ram_select, + u32 addr, u32 length, u32 *buf) +{ + struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); + u32 dp_sel; + int i, ret; + + if (usb_autopm_get_interface(dev->intf) < 0) + return 0; + + mutex_lock(&pdata->dataport_mutex); + + ret = lan78xx_dataport_wait_not_busy(dev); + if (ret < 0) + goto done; + + ret = lan78xx_read_reg(dev, DP_SEL, &dp_sel); + + dp_sel &= ~DP_SEL_RSEL_MASK_; + dp_sel |= ram_select; + ret = lan78xx_write_reg(dev, DP_SEL, dp_sel); + + for (i = 0; i < length; i++) { + ret = lan78xx_write_reg(dev, DP_ADDR, addr + i); + + ret = lan78xx_write_reg(dev, DP_DATA, buf[i]); + + ret = lan78xx_write_reg(dev, DP_CMD, DP_CMD_WRITE_); + + ret = lan78xx_dataport_wait_not_busy(dev); + if (ret < 0) + goto done; + } + +done: + mutex_unlock(&pdata->dataport_mutex); + usb_autopm_put_interface(dev->intf); + + return ret; +} + +static void lan78xx_set_addr_filter(struct lan78xx_priv *pdata, + int index, u8 addr[ETH_ALEN]) +{ + u32 temp; + + if ((pdata) && (index > 0) && (index < NUM_OF_MAF)) { + temp = addr[3]; + temp = addr[2] | (temp << 8); + temp = addr[1] | (temp << 8); + temp = addr[0] | (temp << 8); + pdata->pfilter_table[index][1] = temp; + temp = addr[5]; + temp = addr[4] | (temp << 8); + temp |= MAF_HI_VALID_ | MAF_HI_TYPE_DST_; + pdata->pfilter_table[index][0] = temp; + } +} + +/* returns hash bit number for given MAC address */ +static inline u32 lan78xx_hash(char addr[ETH_ALEN]) +{ + return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff; +} + +static void lan78xx_deferred_multicast_write(struct work_struct *param) +{ + struct lan78xx_priv *pdata = + container_of(param, struct lan78xx_priv, set_multicast); + struct lan78xx_net *dev = pdata->dev; + int i; + int ret; + + netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n", + pdata->rfe_ctl); + + lan78xx_dataport_write(dev, DP_SEL_RSEL_VLAN_DA_, DP_SEL_VHF_VLAN_LEN, + DP_SEL_VHF_HASH_LEN, pdata->mchash_table); + + for (i = 1; i < NUM_OF_MAF; i++) { + ret = lan78xx_write_reg(dev, MAF_HI(i), 0); + ret = lan78xx_write_reg(dev, MAF_LO(i), + pdata->pfilter_table[i][1]); + ret = lan78xx_write_reg(dev, MAF_HI(i), + pdata->pfilter_table[i][0]); + } + + ret = lan78xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); +} + +static void lan78xx_set_multicast(struct net_device *netdev) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); + unsigned long flags; + int i; + + spin_lock_irqsave(&pdata->rfe_ctl_lock, flags); + + pdata->rfe_ctl &= ~(RFE_CTL_UCAST_EN_ | RFE_CTL_MCAST_EN_ | + RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_); + + for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++) + pdata->mchash_table[i] = 0; + /* pfilter_table[0] has own HW address */ + for (i = 1; i < NUM_OF_MAF; i++) { + pdata->pfilter_table[i][0] = + pdata->pfilter_table[i][1] = 0; + } + + pdata->rfe_ctl |= RFE_CTL_BCAST_EN_; + + if (dev->net->flags & IFF_PROMISC) { + netif_dbg(dev, drv, dev->net, "promiscuous mode enabled"); + pdata->rfe_ctl |= RFE_CTL_MCAST_EN_ | RFE_CTL_UCAST_EN_; + } else { + if (dev->net->flags & IFF_ALLMULTI) { + netif_dbg(dev, drv, dev->net, + "receive all multicast enabled"); + pdata->rfe_ctl |= RFE_CTL_MCAST_EN_; + } + } + + if (netdev_mc_count(dev->net)) { + struct netdev_hw_addr *ha; + int i; + + netif_dbg(dev, drv, dev->net, "receive multicast hash filter"); + + pdata->rfe_ctl |= RFE_CTL_DA_PERFECT_; + + i = 1; + netdev_for_each_mc_addr(ha, netdev) { + /* set first 32 into Perfect Filter */ + if (i < 33) { + lan78xx_set_addr_filter(pdata, i, ha->addr); + } else { + u32 bitnum = lan78xx_hash(ha->addr); + + pdata->mchash_table[bitnum / 32] |= + (1 << (bitnum % 32)); + pdata->rfe_ctl |= RFE_CTL_MCAST_HASH_; + } + i++; + } + } + + spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags); + + /* defer register writes to a sleepable context */ + schedule_work(&pdata->set_multicast); +} + +static int lan78xx_update_flowcontrol(struct lan78xx_net *dev, u8 duplex, + u16 lcladv, u16 rmtadv) +{ + u32 flow = 0, fct_flow = 0; + int ret; + + u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); + + if (cap & FLOW_CTRL_TX) + flow = (FLOW_CR_TX_FCEN_ | 0xFFFF); + + if (cap & FLOW_CTRL_RX) + flow |= FLOW_CR_RX_FCEN_; + + if (dev->udev->speed == USB_SPEED_SUPER) + fct_flow = 0x817; + else if (dev->udev->speed == USB_SPEED_HIGH) + fct_flow = 0x211; + + netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s", + (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), + (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); + + ret = lan78xx_write_reg(dev, FCT_FLOW, fct_flow); + + /* threshold value should be set before enabling flow */ + ret = lan78xx_write_reg(dev, FLOW, flow); + + return 0; +} + +static int lan78xx_link_reset(struct lan78xx_net *dev) +{ + struct mii_if_info *mii = &dev->mii; + struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET }; + int ladv, radv, ret; + u32 buf; + + /* clear PHY interrupt status */ + /* VTSE PHY */ + ret = lan78xx_mdio_read(dev->net, mii->phy_id, PHY_VTSE_INT_STS); + if (unlikely(ret < 0)) + return -EIO; + + /* clear LAN78xx interrupt status */ + ret = lan78xx_write_reg(dev, INT_STS, INT_STS_PHY_INT_); + if (unlikely(ret < 0)) + return -EIO; + + if (!mii_link_ok(mii) && dev->link_on) { + dev->link_on = false; + netif_carrier_off(dev->net); + + /* reset MAC */ + ret = lan78xx_read_reg(dev, MAC_CR, &buf); + if (unlikely(ret < 0)) + return -EIO; + buf |= MAC_CR_RST_; + ret = lan78xx_write_reg(dev, MAC_CR, buf); + if (unlikely(ret < 0)) + return -EIO; + } else if (mii_link_ok(mii) && !dev->link_on) { + dev->link_on = true; + + mii_check_media(mii, 1, 1); + mii_ethtool_gset(&dev->mii, &ecmd); + + mii->mdio_read(mii->dev, mii->phy_id, PHY_VTSE_INT_STS); + + if (dev->udev->speed == USB_SPEED_SUPER) { + if (ethtool_cmd_speed(&ecmd) == 1000) { + /* disable U2 */ + ret = lan78xx_read_reg(dev, USB_CFG1, &buf); + buf &= ~USB_CFG1_DEV_U2_INIT_EN_; + ret = lan78xx_write_reg(dev, USB_CFG1, buf); + /* enable U1 */ + ret = lan78xx_read_reg(dev, USB_CFG1, &buf); + buf |= USB_CFG1_DEV_U1_INIT_EN_; + ret = lan78xx_write_reg(dev, USB_CFG1, buf); + } else { + /* enable U1 & U2 */ + ret = lan78xx_read_reg(dev, USB_CFG1, &buf); + buf |= USB_CFG1_DEV_U2_INIT_EN_; + buf |= USB_CFG1_DEV_U1_INIT_EN_; + ret = lan78xx_write_reg(dev, USB_CFG1, buf); + } + } + + ladv = lan78xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE); + if (ladv < 0) + return ladv; + + radv = lan78xx_mdio_read(dev->net, mii->phy_id, MII_LPA); + if (radv < 0) + return radv; + + netif_dbg(dev, link, dev->net, + "speed: %u duplex: %d anadv: 0x%04x anlpa: 0x%04x", + ethtool_cmd_speed(&ecmd), ecmd.duplex, ladv, radv); + + ret = lan78xx_update_flowcontrol(dev, ecmd.duplex, ladv, radv); + netif_carrier_on(dev->net); + } + + return ret; +} + +/* some work can't be done in tasklets, so we use keventd + * + * NOTE: annoying asymmetry: if it's active, schedule_work() fails, + * but tasklet_schedule() doesn't. hope the failure is rare. + */ +void lan78xx_defer_kevent(struct lan78xx_net *dev, int work) +{ + set_bit(work, &dev->flags); + if (!schedule_delayed_work(&dev->wq, 0)) + netdev_err(dev->net, "kevent %d may have been dropped\n", work); +} + +static void lan78xx_status(struct lan78xx_net *dev, struct urb *urb) +{ + u32 intdata; + + if (urb->actual_length != 4) { + netdev_warn(dev->net, + "unexpected urb length %d", urb->actual_length); + return; + } + + memcpy(&intdata, urb->transfer_buffer, 4); + le32_to_cpus(&intdata); + + if (intdata & INT_ENP_PHY_INT) { + netif_dbg(dev, link, dev->net, "PHY INTR: 0x%08x\n", intdata); + lan78xx_defer_kevent(dev, EVENT_LINK_RESET); + } else + netdev_warn(dev->net, + "unexpected interrupt: 0x%08x\n", intdata); +} + +static int lan78xx_ethtool_get_eeprom_len(struct net_device *netdev) +{ + return MAX_EEPROM_SIZE; +} + +static int lan78xx_ethtool_get_eeprom(struct net_device *netdev, + struct ethtool_eeprom *ee, u8 *data) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + + ee->magic = LAN78XX_EEPROM_MAGIC; + + return lan78xx_read_raw_eeprom(dev, ee->offset, ee->len, data); +} + +static int lan78xx_ethtool_set_eeprom(struct net_device *netdev, + struct ethtool_eeprom *ee, u8 *data) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + + /* Allow entire eeprom update only */ + if ((ee->magic == LAN78XX_EEPROM_MAGIC) && + (ee->offset == 0) && + (ee->len == 512) && + (data[0] == EEPROM_INDICATOR)) + return lan78xx_write_raw_eeprom(dev, ee->offset, ee->len, data); + else if ((ee->magic == LAN78XX_OTP_MAGIC) && + (ee->offset == 0) && + (ee->len == 512) && + (data[0] == OTP_INDICATOR_1)) + return lan78xx_write_raw_eeprom(dev, ee->offset, ee->len, data); + + return -EINVAL; +} + +static void lan78xx_get_strings(struct net_device *netdev, u32 stringset, + u8 *data) +{ + if (stringset == ETH_SS_STATS) + memcpy(data, lan78xx_gstrings, sizeof(lan78xx_gstrings)); +} + +static int lan78xx_get_sset_count(struct net_device *netdev, int sset) +{ + if (sset == ETH_SS_STATS) + return ARRAY_SIZE(lan78xx_gstrings); + else + return -EOPNOTSUPP; +} + +static void lan78xx_get_stats(struct net_device *netdev, + struct ethtool_stats *stats, u64 *data) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + struct lan78xx_statstage lan78xx_stat; + u32 *p; + int i; + + if (usb_autopm_get_interface(dev->intf) < 0) + return; + + if (lan78xx_read_stats(dev, &lan78xx_stat) > 0) { + p = (u32 *)&lan78xx_stat; + for (i = 0; i < (sizeof(lan78xx_stat) / (sizeof(u32))); i++) + data[i] = p[i]; + } + + usb_autopm_put_interface(dev->intf); +} + +static void lan78xx_get_wol(struct net_device *netdev, + struct ethtool_wolinfo *wol) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + int ret; + u32 buf; + struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); + + if (usb_autopm_get_interface(dev->intf) < 0) + return; + + ret = lan78xx_read_reg(dev, USB_CFG0, &buf); + if (unlikely(ret < 0)) { + wol->supported = 0; + wol->wolopts = 0; + } else { + if (buf & USB_CFG_RMT_WKP_) { + wol->supported = WAKE_ALL; + wol->wolopts = pdata->wol; + } else { + wol->supported = 0; + wol->wolopts = 0; + } + } + + usb_autopm_put_interface(dev->intf); +} + +static int lan78xx_set_wol(struct net_device *netdev, + struct ethtool_wolinfo *wol) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); + int ret; + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + return ret; + + pdata->wol = 0; + if (wol->wolopts & WAKE_UCAST) + pdata->wol |= WAKE_UCAST; + if (wol->wolopts & WAKE_MCAST) + pdata->wol |= WAKE_MCAST; + if (wol->wolopts & WAKE_BCAST) + pdata->wol |= WAKE_BCAST; + if (wol->wolopts & WAKE_MAGIC) + pdata->wol |= WAKE_MAGIC; + if (wol->wolopts & WAKE_PHY) + pdata->wol |= WAKE_PHY; + if (wol->wolopts & WAKE_ARP) + pdata->wol |= WAKE_ARP; + + device_set_wakeup_enable(&dev->udev->dev, (bool)wol->wolopts); + + usb_autopm_put_interface(dev->intf); + + return ret; +} + +static int lan78xx_get_eee(struct net_device *net, struct ethtool_eee *edata) +{ + struct lan78xx_net *dev = netdev_priv(net); + int ret; + u32 buf; + u32 adv, lpadv; + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + return ret; + + ret = lan78xx_read_reg(dev, MAC_CR, &buf); + if (buf & MAC_CR_EEE_EN_) { + buf = lan78xx_mmd_read(dev->net, dev->mii.phy_id, + PHY_MMD_DEV_7, PHY_EEE_ADVERTISEMENT); + adv = mmd_eee_adv_to_ethtool_adv_t(buf); + buf = lan78xx_mmd_read(dev->net, dev->mii.phy_id, + PHY_MMD_DEV_7, PHY_EEE_LP_ADVERTISEMENT); + lpadv = mmd_eee_adv_to_ethtool_adv_t(buf); + + edata->eee_enabled = true; + edata->supported = true; + edata->eee_active = !!(adv & lpadv); + edata->advertised = adv; + edata->lp_advertised = lpadv; + edata->tx_lpi_enabled = true; + /* EEE_TX_LPI_REQ_DLY & tx_lpi_timer are same uSec unit */ + ret = lan78xx_read_reg(dev, EEE_TX_LPI_REQ_DLY, &buf); + edata->tx_lpi_timer = buf; + } else { + buf = lan78xx_mmd_read(dev->net, dev->mii.phy_id, + PHY_MMD_DEV_7, PHY_EEE_LP_ADVERTISEMENT); + lpadv = mmd_eee_adv_to_ethtool_adv_t(buf); + + edata->eee_enabled = false; + edata->eee_active = false; + edata->supported = false; + edata->advertised = 0; + edata->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(lpadv); + edata->tx_lpi_enabled = false; + edata->tx_lpi_timer = 0; + } + + usb_autopm_put_interface(dev->intf); + + return 0; +} + +static int lan78xx_set_eee(struct net_device *net, struct ethtool_eee *edata) +{ + struct lan78xx_net *dev = netdev_priv(net); + int ret; + u32 buf; + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + return ret; + + if (edata->eee_enabled) { + ret = lan78xx_read_reg(dev, MAC_CR, &buf); + buf |= MAC_CR_EEE_EN_; + ret = lan78xx_write_reg(dev, MAC_CR, buf); + + buf = ethtool_adv_to_mmd_eee_adv_t(edata->advertised); + lan78xx_mmd_write(dev->net, dev->mii.phy_id, + PHY_MMD_DEV_7, PHY_EEE_ADVERTISEMENT, buf); + } else { + ret = lan78xx_read_reg(dev, MAC_CR, &buf); + buf &= ~MAC_CR_EEE_EN_; + ret = lan78xx_write_reg(dev, MAC_CR, buf); + } + + usb_autopm_put_interface(dev->intf); + + return 0; +} + +static u32 lan78xx_get_link(struct net_device *net) +{ + struct lan78xx_net *dev = netdev_priv(net); + + return mii_link_ok(&dev->mii); +} + +int lan78xx_nway_reset(struct net_device *net) +{ + struct lan78xx_net *dev = netdev_priv(net); + + if ((!dev->mii.mdio_read) || (!dev->mii.mdio_write)) + return -EOPNOTSUPP; + + return mii_nway_restart(&dev->mii); +} + +static void lan78xx_get_drvinfo(struct net_device *net, + struct ethtool_drvinfo *info) +{ + struct lan78xx_net *dev = netdev_priv(net); + + strncpy(info->driver, DRIVER_NAME, sizeof(info->driver)); + strncpy(info->version, DRIVER_VERSION, sizeof(info->version)); + usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); +} + +static u32 lan78xx_get_msglevel(struct net_device *net) +{ + struct lan78xx_net *dev = netdev_priv(net); + + return dev->msg_enable; +} + +static void lan78xx_set_msglevel(struct net_device *net, u32 level) +{ + struct lan78xx_net *dev = netdev_priv(net); + + dev->msg_enable = level; +} + +static int lan78xx_get_settings(struct net_device *net, struct ethtool_cmd *cmd) +{ + struct lan78xx_net *dev = netdev_priv(net); + struct mii_if_info *mii = &dev->mii; + int ret; + int buf; + + if ((!dev->mii.mdio_read) || (!dev->mii.mdio_write)) + return -EOPNOTSUPP; + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + return ret; + + ret = mii_ethtool_gset(&dev->mii, cmd); + + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_GPIO_PAGE, PHY_EXT_GPIO_PAGE_SPACE_1); + buf = mii->mdio_read(mii->dev, mii->phy_id, PHY_EXT_MODE_CTRL); + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_GPIO_PAGE, PHY_EXT_GPIO_PAGE_SPACE_0); + + buf &= PHY_EXT_MODE_CTRL_MDIX_MASK_; + if (buf == PHY_EXT_MODE_CTRL_AUTO_MDIX_) { + cmd->eth_tp_mdix = ETH_TP_MDI_AUTO; + cmd->eth_tp_mdix_ctrl = ETH_TP_MDI_AUTO; + } else if (buf == PHY_EXT_MODE_CTRL_MDI_) { + cmd->eth_tp_mdix = ETH_TP_MDI; + cmd->eth_tp_mdix_ctrl = ETH_TP_MDI; + } else if (buf == PHY_EXT_MODE_CTRL_MDI_X_) { + cmd->eth_tp_mdix = ETH_TP_MDI_X; + cmd->eth_tp_mdix_ctrl = ETH_TP_MDI_X; + } + + usb_autopm_put_interface(dev->intf); + + return ret; +} + +static int lan78xx_set_settings(struct net_device *net, struct ethtool_cmd *cmd) +{ + struct lan78xx_net *dev = netdev_priv(net); + struct mii_if_info *mii = &dev->mii; + int ret = 0; + int temp; + + if ((!dev->mii.mdio_read) || (!dev->mii.mdio_write)) + return -EOPNOTSUPP; + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + return ret; + + if (dev->mdix_ctrl != cmd->eth_tp_mdix_ctrl) { + if (cmd->eth_tp_mdix_ctrl == ETH_TP_MDI) { + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_GPIO_PAGE, + PHY_EXT_GPIO_PAGE_SPACE_1); + temp = mii->mdio_read(mii->dev, mii->phy_id, + PHY_EXT_MODE_CTRL); + temp &= ~PHY_EXT_MODE_CTRL_MDIX_MASK_; + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_MODE_CTRL, + temp | PHY_EXT_MODE_CTRL_MDI_); + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_GPIO_PAGE, + PHY_EXT_GPIO_PAGE_SPACE_0); + } else if (cmd->eth_tp_mdix_ctrl == ETH_TP_MDI_X) { + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_GPIO_PAGE, + PHY_EXT_GPIO_PAGE_SPACE_1); + temp = mii->mdio_read(mii->dev, mii->phy_id, + PHY_EXT_MODE_CTRL); + temp &= ~PHY_EXT_MODE_CTRL_MDIX_MASK_; + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_MODE_CTRL, + temp | PHY_EXT_MODE_CTRL_MDI_X_); + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_GPIO_PAGE, + PHY_EXT_GPIO_PAGE_SPACE_0); + } else if (cmd->eth_tp_mdix_ctrl == ETH_TP_MDI_AUTO) { + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_GPIO_PAGE, + PHY_EXT_GPIO_PAGE_SPACE_1); + temp = mii->mdio_read(mii->dev, mii->phy_id, + PHY_EXT_MODE_CTRL); + temp &= ~PHY_EXT_MODE_CTRL_MDIX_MASK_; + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_MODE_CTRL, + temp | PHY_EXT_MODE_CTRL_AUTO_MDIX_); + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_GPIO_PAGE, + PHY_EXT_GPIO_PAGE_SPACE_0); + } + } + + /* change speed & duplex */ + ret = mii_ethtool_sset(&dev->mii, cmd); + + if (!cmd->autoneg) { + /* force link down */ + temp = mii->mdio_read(mii->dev, mii->phy_id, MII_BMCR); + mii->mdio_write(mii->dev, mii->phy_id, MII_BMCR, + temp | BMCR_LOOPBACK); + mdelay(1); + mii->mdio_write(mii->dev, mii->phy_id, MII_BMCR, temp); + } + + usb_autopm_put_interface(dev->intf); + + return ret; +} + +static const struct ethtool_ops lan78xx_ethtool_ops = { + .get_link = lan78xx_get_link, + .nway_reset = lan78xx_nway_reset, + .get_drvinfo = lan78xx_get_drvinfo, + .get_msglevel = lan78xx_get_msglevel, + .set_msglevel = lan78xx_set_msglevel, + .get_settings = lan78xx_get_settings, + .set_settings = lan78xx_set_settings, + .get_eeprom_len = lan78xx_ethtool_get_eeprom_len, + .get_eeprom = lan78xx_ethtool_get_eeprom, + .set_eeprom = lan78xx_ethtool_set_eeprom, + .get_ethtool_stats = lan78xx_get_stats, + .get_sset_count = lan78xx_get_sset_count, + .get_strings = lan78xx_get_strings, + .get_wol = lan78xx_get_wol, + .set_wol = lan78xx_set_wol, + .get_eee = lan78xx_get_eee, + .set_eee = lan78xx_set_eee, +}; + +static int lan78xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + + if (!netif_running(netdev)) + return -EINVAL; + + return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL); +} + +static void lan78xx_init_mac_address(struct lan78xx_net *dev) +{ + u32 addr_lo, addr_hi; + int ret; + u8 addr[6]; + + ret = lan78xx_read_reg(dev, RX_ADDRL, &addr_lo); + ret = lan78xx_read_reg(dev, RX_ADDRH, &addr_hi); + + addr[0] = addr_lo & 0xFF; + addr[1] = (addr_lo >> 8) & 0xFF; + addr[2] = (addr_lo >> 16) & 0xFF; + addr[3] = (addr_lo >> 24) & 0xFF; + addr[4] = addr_hi & 0xFF; + addr[5] = (addr_hi >> 8) & 0xFF; + + if (!is_valid_ether_addr(addr)) { + /* reading mac address from EEPROM or OTP */ + if ((lan78xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, + addr) == 0) || + (lan78xx_read_otp(dev, EEPROM_MAC_OFFSET, ETH_ALEN, + addr) == 0)) { + if (is_valid_ether_addr(addr)) { + /* eeprom values are valid so use them */ + netif_dbg(dev, ifup, dev->net, + "MAC address read from EEPROM"); + } else { + /* generate random MAC */ + random_ether_addr(addr); + netif_dbg(dev, ifup, dev->net, + "MAC address set to random addr"); + } + + addr_lo = addr[0] | (addr[1] << 8) | + (addr[2] << 16) | (addr[3] << 24); + addr_hi = addr[4] | (addr[5] << 8); + + ret = lan78xx_write_reg(dev, RX_ADDRL, addr_lo); + ret = lan78xx_write_reg(dev, RX_ADDRH, addr_hi); + } else { + /* generate random MAC */ + random_ether_addr(addr); + netif_dbg(dev, ifup, dev->net, + "MAC address set to random addr"); + } + } + + ret = lan78xx_write_reg(dev, MAF_LO(0), addr_lo); + ret = lan78xx_write_reg(dev, MAF_HI(0), addr_hi | MAF_HI_VALID_); + + ether_addr_copy(dev->net->dev_addr, addr); +} + +static void lan78xx_mii_init(struct lan78xx_net *dev) +{ + /* Initialize MII structure */ + dev->mii.dev = dev->net; + dev->mii.mdio_read = lan78xx_mdio_read; + dev->mii.mdio_write = lan78xx_mdio_write; + dev->mii.phy_id_mask = 0x1f; + dev->mii.reg_num_mask = 0x1f; + dev->mii.phy_id = INTERNAL_PHY_ID; + dev->mii.supports_gmii = true; +} + +static int lan78xx_phy_init(struct lan78xx_net *dev) +{ + int temp; + struct mii_if_info *mii = &dev->mii; + + if ((!mii->mdio_write) || (!mii->mdio_read)) + return -EOPNOTSUPP; + + temp = mii->mdio_read(mii->dev, mii->phy_id, MII_ADVERTISE); + temp |= ADVERTISE_ALL; + mii->mdio_write(mii->dev, mii->phy_id, MII_ADVERTISE, + temp | ADVERTISE_CSMA | + ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM); + + /* set to AUTOMDIX */ + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_GPIO_PAGE, PHY_EXT_GPIO_PAGE_SPACE_1); + temp = mii->mdio_read(mii->dev, mii->phy_id, PHY_EXT_MODE_CTRL); + temp &= ~PHY_EXT_MODE_CTRL_MDIX_MASK_; + mii->mdio_write(mii->dev, mii->phy_id, PHY_EXT_MODE_CTRL, + temp | PHY_EXT_MODE_CTRL_AUTO_MDIX_); + mii->mdio_write(mii->dev, mii->phy_id, + PHY_EXT_GPIO_PAGE, PHY_EXT_GPIO_PAGE_SPACE_0); + dev->mdix_ctrl = ETH_TP_MDI_AUTO; + + /* MAC doesn't support 1000HD */ + temp = mii->mdio_read(mii->dev, mii->phy_id, MII_CTRL1000); + mii->mdio_write(mii->dev, mii->phy_id, MII_CTRL1000, + temp & ~ADVERTISE_1000HALF); + + /* clear interrupt */ + mii->mdio_read(mii->dev, mii->phy_id, PHY_VTSE_INT_STS); + mii->mdio_write(mii->dev, mii->phy_id, PHY_VTSE_INT_MASK, + PHY_VTSE_INT_MASK_MDINTPIN_EN_ | + PHY_VTSE_INT_MASK_LINK_CHANGE_); + + netif_dbg(dev, ifup, dev->net, "phy initialised successfully"); + + return 0; +} + +static int lan78xx_set_rx_max_frame_length(struct lan78xx_net *dev, int size) +{ + int ret = 0; + u32 buf; + bool rxenabled; + + ret = lan78xx_read_reg(dev, MAC_RX, &buf); + + rxenabled = ((buf & MAC_RX_RXEN_) != 0); + + if (rxenabled) { + buf &= ~MAC_RX_RXEN_; + ret = lan78xx_write_reg(dev, MAC_RX, buf); + } + + /* add 4 to size for FCS */ + buf &= ~MAC_RX_MAX_SIZE_MASK_; + buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT_) & MAC_RX_MAX_SIZE_MASK_); + + ret = lan78xx_write_reg(dev, MAC_RX, buf); + + if (rxenabled) { + buf |= MAC_RX_RXEN_; + ret = lan78xx_write_reg(dev, MAC_RX, buf); + } + + return 0; +} + +static int unlink_urbs(struct lan78xx_net *dev, struct sk_buff_head *q) +{ + struct sk_buff *skb; + unsigned long flags; + int count = 0; + + spin_lock_irqsave(&q->lock, flags); + while (!skb_queue_empty(q)) { + struct skb_data *entry; + struct urb *urb; + int ret; + + skb_queue_walk(q, skb) { + entry = (struct skb_data *)skb->cb; + if (entry->state != unlink_start) + goto found; + } + break; +found: + entry->state = unlink_start; + urb = entry->urb; + + /* Get reference count of the URB to avoid it to be + * freed during usb_unlink_urb, which may trigger + * use-after-free problem inside usb_unlink_urb since + * usb_unlink_urb is always racing with .complete + * handler(include defer_bh). + */ + usb_get_urb(urb); + spin_unlock_irqrestore(&q->lock, flags); + /* during some PM-driven resume scenarios, + * these (async) unlinks complete immediately + */ + ret = usb_unlink_urb(urb); + if (ret != -EINPROGRESS && ret != 0) + netdev_dbg(dev->net, "unlink urb err, %d\n", ret); + else + count++; + usb_put_urb(urb); + spin_lock_irqsave(&q->lock, flags); + } + spin_unlock_irqrestore(&q->lock, flags); + return count; +} + +static int lan78xx_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + int ll_mtu = new_mtu + netdev->hard_header_len; + int old_hard_mtu = dev->hard_mtu; + int old_rx_urb_size = dev->rx_urb_size; + int ret; + + if (new_mtu > MAX_SINGLE_PACKET_SIZE) + return -EINVAL; + + if (new_mtu <= 0) + return -EINVAL; + /* no second zero-length packet read wanted after mtu-sized packets */ + if ((ll_mtu % dev->maxpacket) == 0) + return -EDOM; + + ret = lan78xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN); + + netdev->mtu = new_mtu; + + dev->hard_mtu = netdev->mtu + netdev->hard_header_len; + if (dev->rx_urb_size == old_hard_mtu) { + dev->rx_urb_size = dev->hard_mtu; + if (dev->rx_urb_size > old_rx_urb_size) { + if (netif_running(dev->net)) { + unlink_urbs(dev, &dev->rxq); + tasklet_schedule(&dev->bh); + } + } + } + + return 0; +} + +int lan78xx_set_mac_addr(struct net_device *netdev, void *p) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + struct sockaddr *addr = p; + u32 addr_lo, addr_hi; + int ret; + + if (netif_running(netdev)) + return -EBUSY; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + ether_addr_copy(netdev->dev_addr, addr->sa_data); + + addr_lo = netdev->dev_addr[0] | + netdev->dev_addr[1] << 8 | + netdev->dev_addr[2] << 16 | + netdev->dev_addr[3] << 24; + addr_hi = netdev->dev_addr[4] | + netdev->dev_addr[5] << 8; + + ret = lan78xx_write_reg(dev, RX_ADDRL, addr_lo); + ret = lan78xx_write_reg(dev, RX_ADDRH, addr_hi); + + return 0; +} + +/* Enable or disable Rx checksum offload engine */ +static int lan78xx_set_features(struct net_device *netdev, + netdev_features_t features) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); + unsigned long flags; + int ret; + + spin_lock_irqsave(&pdata->rfe_ctl_lock, flags); + + if (features & NETIF_F_RXCSUM) { + pdata->rfe_ctl |= RFE_CTL_TCPUDP_COE_ | RFE_CTL_IP_COE_; + pdata->rfe_ctl |= RFE_CTL_ICMP_COE_ | RFE_CTL_IGMP_COE_; + } else { + pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_COE_ | RFE_CTL_IP_COE_); + pdata->rfe_ctl &= ~(RFE_CTL_ICMP_COE_ | RFE_CTL_IGMP_COE_); + } + + if (features & NETIF_F_HW_VLAN_CTAG_RX) + pdata->rfe_ctl |= RFE_CTL_VLAN_FILTER_; + else + pdata->rfe_ctl &= ~RFE_CTL_VLAN_FILTER_; + + spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags); + + ret = lan78xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); + + return 0; +} + +static void lan78xx_deferred_vlan_write(struct work_struct *param) +{ + struct lan78xx_priv *pdata = + container_of(param, struct lan78xx_priv, set_vlan); + struct lan78xx_net *dev = pdata->dev; + + lan78xx_dataport_write(dev, DP_SEL_RSEL_VLAN_DA_, 0, + DP_SEL_VHF_VLAN_LEN, pdata->vlan_table); +} + +static int lan78xx_vlan_rx_add_vid(struct net_device *netdev, + __be16 proto, u16 vid) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); + u16 vid_bit_index; + u16 vid_dword_index; + + vid_dword_index = (vid >> 5) & 0x7F; + vid_bit_index = vid & 0x1F; + + pdata->vlan_table[vid_dword_index] |= (1 << vid_bit_index); + + /* defer register writes to a sleepable context */ + schedule_work(&pdata->set_vlan); + + return 0; +} + +static int lan78xx_vlan_rx_kill_vid(struct net_device *netdev, + __be16 proto, u16 vid) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); + u16 vid_bit_index; + u16 vid_dword_index; + + vid_dword_index = (vid >> 5) & 0x7F; + vid_bit_index = vid & 0x1F; + + pdata->vlan_table[vid_dword_index] &= ~(1 << vid_bit_index); + + /* defer register writes to a sleepable context */ + schedule_work(&pdata->set_vlan); + + return 0; +} + +static void lan78xx_init_ltm(struct lan78xx_net *dev) +{ + int ret; + u32 buf; + u32 regs[6] = { 0 }; + + ret = lan78xx_read_reg(dev, USB_CFG1, &buf); + if (buf & USB_CFG1_LTM_ENABLE_) { + u8 temp[2]; + /* Get values from EEPROM first */ + if (lan78xx_read_eeprom(dev, 0x3F, 2, temp) == 0) { + if (temp[0] == 24) { + ret = lan78xx_read_raw_eeprom(dev, + temp[1] * 2, + 24, + (u8 *)regs); + if (ret < 0) + return; + } + } else if (lan78xx_read_otp(dev, 0x3F, 2, temp) == 0) { + if (temp[0] == 24) { + ret = lan78xx_read_raw_otp(dev, + temp[1] * 2, + 24, + (u8 *)regs); + if (ret < 0) + return; + } + } + } + + lan78xx_write_reg(dev, LTM_BELT_IDLE0, regs[0]); + lan78xx_write_reg(dev, LTM_BELT_IDLE1, regs[1]); + lan78xx_write_reg(dev, LTM_BELT_ACT0, regs[2]); + lan78xx_write_reg(dev, LTM_BELT_ACT1, regs[3]); + lan78xx_write_reg(dev, LTM_INACTIVE0, regs[4]); + lan78xx_write_reg(dev, LTM_INACTIVE1, regs[5]); +} + +static int lan78xx_reset(struct lan78xx_net *dev) +{ + struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); + u32 buf; + int ret = 0; + unsigned long timeout; + + ret = lan78xx_read_reg(dev, HW_CFG, &buf); + buf |= HW_CFG_LRST_; + ret = lan78xx_write_reg(dev, HW_CFG, buf); + + timeout = jiffies + HZ; + do { + mdelay(1); + ret = lan78xx_read_reg(dev, HW_CFG, &buf); + if (time_after(jiffies, timeout)) { + netdev_warn(dev->net, + "timeout on completion of LiteReset"); + return -EIO; + } + } while (buf & HW_CFG_LRST_); + + lan78xx_init_mac_address(dev); + + /* Respond to the IN token with a NAK */ + ret = lan78xx_read_reg(dev, USB_CFG0, &buf); + buf |= USB_CFG_BIR_; + ret = lan78xx_write_reg(dev, USB_CFG0, buf); + + /* Init LTM */ + lan78xx_init_ltm(dev); + + dev->net->hard_header_len += TX_OVERHEAD; + dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; + + if (dev->udev->speed == USB_SPEED_SUPER) { + buf = DEFAULT_BURST_CAP_SIZE / SS_USB_PKT_SIZE; + dev->rx_urb_size = DEFAULT_BURST_CAP_SIZE; + dev->rx_qlen = 4; + dev->tx_qlen = 4; + } else if (dev->udev->speed == USB_SPEED_HIGH) { + buf = DEFAULT_BURST_CAP_SIZE / HS_USB_PKT_SIZE; + dev->rx_urb_size = DEFAULT_BURST_CAP_SIZE; + dev->rx_qlen = RX_MAX_QUEUE_MEMORY / dev->rx_urb_size; + dev->tx_qlen = RX_MAX_QUEUE_MEMORY / dev->hard_mtu; + } else { + buf = DEFAULT_BURST_CAP_SIZE / FS_USB_PKT_SIZE; + dev->rx_urb_size = DEFAULT_BURST_CAP_SIZE; + dev->rx_qlen = 4; + } + + ret = lan78xx_write_reg(dev, BURST_CAP, buf); + ret = lan78xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); + + ret = lan78xx_read_reg(dev, HW_CFG, &buf); + buf |= HW_CFG_MEF_; + ret = lan78xx_write_reg(dev, HW_CFG, buf); + + ret = lan78xx_read_reg(dev, USB_CFG0, &buf); + buf |= USB_CFG_BCE_; + ret = lan78xx_write_reg(dev, USB_CFG0, buf); + + /* set FIFO sizes */ + buf = (MAX_RX_FIFO_SIZE - 512) / 512; + ret = lan78xx_write_reg(dev, FCT_RX_FIFO_END, buf); + + buf = (MAX_TX_FIFO_SIZE - 512) / 512; + ret = lan78xx_write_reg(dev, FCT_TX_FIFO_END, buf); + + ret = lan78xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); + ret = lan78xx_write_reg(dev, FLOW, 0); + ret = lan78xx_write_reg(dev, FCT_FLOW, 0); + + /* Don't need rfe_ctl_lock during initialisation */ + ret = lan78xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl); + pdata->rfe_ctl |= RFE_CTL_BCAST_EN_ | RFE_CTL_DA_PERFECT_; + ret = lan78xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); + + /* Enable or disable checksum offload engines */ + lan78xx_set_features(dev->net, dev->net->features); + + lan78xx_set_multicast(dev->net); + + /* reset PHY */ + ret = lan78xx_read_reg(dev, PMT_CTL, &buf); + buf |= PMT_CTL_PHY_RST_; + ret = lan78xx_write_reg(dev, PMT_CTL, buf); + + timeout = jiffies + HZ; + do { + mdelay(1); + ret = lan78xx_read_reg(dev, PMT_CTL, &buf); + if (time_after(jiffies, timeout)) { + netdev_warn(dev->net, "timeout waiting for PHY Reset"); + return -EIO; + } + } while (buf & PMT_CTL_PHY_RST_); + + lan78xx_mii_init(dev); + + ret = lan78xx_phy_init(dev); + + ret = lan78xx_read_reg(dev, MAC_CR, &buf); + + buf |= MAC_CR_GMII_EN_; + buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_; + + ret = lan78xx_write_reg(dev, MAC_CR, buf); + + /* enable on PHY */ + if (buf & MAC_CR_EEE_EN_) + lan78xx_mmd_write(dev->net, dev->mii.phy_id, 0x07, 0x3C, 0x06); + + /* enable PHY interrupts */ + ret = lan78xx_read_reg(dev, INT_EP_CTL, &buf); + buf |= INT_ENP_PHY_INT; + ret = lan78xx_write_reg(dev, INT_EP_CTL, buf); + + ret = lan78xx_read_reg(dev, MAC_TX, &buf); + buf |= MAC_TX_TXEN_; + ret = lan78xx_write_reg(dev, MAC_TX, buf); + + ret = lan78xx_read_reg(dev, FCT_TX_CTL, &buf); + buf |= FCT_TX_CTL_EN_; + ret = lan78xx_write_reg(dev, FCT_TX_CTL, buf); + + ret = lan78xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN); + + ret = lan78xx_read_reg(dev, MAC_RX, &buf); + buf |= MAC_RX_RXEN_; + ret = lan78xx_write_reg(dev, MAC_RX, buf); + + ret = lan78xx_read_reg(dev, FCT_RX_CTL, &buf); + buf |= FCT_RX_CTL_EN_; + ret = lan78xx_write_reg(dev, FCT_RX_CTL, buf); + + if (!mii_nway_restart(&dev->mii)) + netif_dbg(dev, link, dev->net, "autoneg initiated"); + + return 0; +} + +static int lan78xx_open(struct net_device *net) +{ + struct lan78xx_net *dev = netdev_priv(net); + int ret; + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + goto out; + + ret = lan78xx_reset(dev); + if (ret < 0) + goto done; + + /* for Link Check */ + if (dev->urb_intr) { + ret = usb_submit_urb(dev->urb_intr, GFP_KERNEL); + if (ret < 0) { + netif_err(dev, ifup, dev->net, + "intr submit %d\n", ret); + goto done; + } + } + + set_bit(EVENT_DEV_OPEN, &dev->flags); + + netif_start_queue(net); + + dev->link_on = false; + + lan78xx_defer_kevent(dev, EVENT_LINK_RESET); +done: + usb_autopm_put_interface(dev->intf); + +out: + return ret; +} + +static void lan78xx_terminate_urbs(struct lan78xx_net *dev) +{ + DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup); + DECLARE_WAITQUEUE(wait, current); + int temp; + + /* ensure there are no more active urbs */ + add_wait_queue(&unlink_wakeup, &wait); + set_current_state(TASK_UNINTERRUPTIBLE); + dev->wait = &unlink_wakeup; + temp = unlink_urbs(dev, &dev->txq) + unlink_urbs(dev, &dev->rxq); + + /* maybe wait for deletions to finish. */ + while (!skb_queue_empty(&dev->rxq) && + !skb_queue_empty(&dev->txq) && + !skb_queue_empty(&dev->done)) { + schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); + set_current_state(TASK_UNINTERRUPTIBLE); + netif_dbg(dev, ifdown, dev->net, + "waited for %d urb completions\n", temp); + } + set_current_state(TASK_RUNNING); + dev->wait = NULL; + remove_wait_queue(&unlink_wakeup, &wait); +} + +int lan78xx_stop(struct net_device *net) +{ + struct lan78xx_net *dev = netdev_priv(net); + + clear_bit(EVENT_DEV_OPEN, &dev->flags); + netif_stop_queue(net); + + netif_info(dev, ifdown, dev->net, + "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", + net->stats.rx_packets, net->stats.tx_packets, + net->stats.rx_errors, net->stats.tx_errors); + + lan78xx_terminate_urbs(dev); + + usb_kill_urb(dev->urb_intr); + + skb_queue_purge(&dev->rxq_pause); + + /* deferred work (task, timer, softirq) must also stop. + * can't flush_scheduled_work() until we drop rtnl (later), + * else workers could deadlock; so make workers a NOP. + */ + dev->flags = 0; + cancel_delayed_work_sync(&dev->wq); + tasklet_kill(&dev->bh); + + usb_autopm_put_interface(dev->intf); + + return 0; +} + +static int lan78xx_linearize(struct sk_buff *skb) +{ + return skb_linearize(skb); +} + +static struct sk_buff *lan78xx_tx_prep(struct lan78xx_net *dev, + struct sk_buff *skb, gfp_t flags) +{ + u32 tx_cmd_a, tx_cmd_b; + + if (skb_headroom(skb) < TX_OVERHEAD) { + struct sk_buff *skb2; + + skb2 = skb_copy_expand(skb, TX_OVERHEAD, 0, flags); + dev_kfree_skb_any(skb); + skb = skb2; + if (!skb) + return NULL; + } + + if (lan78xx_linearize(skb) < 0) + return NULL; + + tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN_MASK_) | TX_CMD_A_FCS_; + + if (skb->ip_summed == CHECKSUM_PARTIAL) + tx_cmd_a |= TX_CMD_A_IPE_ | TX_CMD_A_TPE_; + + tx_cmd_b = 0; + if (skb_is_gso(skb)) { + u16 mss = max(skb_shinfo(skb)->gso_size, TX_CMD_B_MSS_MIN_); + + tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT_) & TX_CMD_B_MSS_MASK_; + + tx_cmd_a |= TX_CMD_A_LSO_; + } + + if (skb_vlan_tag_present(skb)) { + tx_cmd_a |= TX_CMD_A_IVTG_; + tx_cmd_b |= skb_vlan_tag_get(skb) & TX_CMD_B_VTAG_MASK_; + } + + skb_push(skb, 4); + cpu_to_le32s(&tx_cmd_b); + memcpy(skb->data, &tx_cmd_b, 4); + + skb_push(skb, 4); + cpu_to_le32s(&tx_cmd_a); + memcpy(skb->data, &tx_cmd_a, 4); + + return skb; +} + +static enum skb_state defer_bh(struct lan78xx_net *dev, struct sk_buff *skb, + struct sk_buff_head *list, enum skb_state state) +{ + unsigned long flags; + enum skb_state old_state; + struct skb_data *entry = (struct skb_data *)skb->cb; + + spin_lock_irqsave(&list->lock, flags); + old_state = entry->state; + entry->state = state; + + __skb_unlink(skb, list); + spin_unlock(&list->lock); + spin_lock(&dev->done.lock); + + __skb_queue_tail(&dev->done, skb); + if (skb_queue_len(&dev->done) == 1) + tasklet_schedule(&dev->bh); + spin_unlock_irqrestore(&dev->done.lock, flags); + + return old_state; +} + +static void tx_complete(struct urb *urb) +{ + struct sk_buff *skb = (struct sk_buff *)urb->context; + struct skb_data *entry = (struct skb_data *)skb->cb; + struct lan78xx_net *dev = entry->dev; + + if (urb->status == 0) { + dev->net->stats.tx_packets++; + dev->net->stats.tx_bytes += entry->length; + } else { + dev->net->stats.tx_errors++; + + switch (urb->status) { + case -EPIPE: + lan78xx_defer_kevent(dev, EVENT_TX_HALT); + break; + + /* software-driven interface shutdown */ + case -ECONNRESET: + case -ESHUTDOWN: + break; + + case -EPROTO: + case -ETIME: + case -EILSEQ: + netif_stop_queue(dev->net); + break; + default: + netif_dbg(dev, tx_err, dev->net, + "tx err %d\n", entry->urb->status); + break; + } + } + + usb_autopm_put_interface_async(dev->intf); + + defer_bh(dev, skb, &dev->txq, tx_done); +} + +static void lan78xx_queue_skb(struct sk_buff_head *list, + struct sk_buff *newsk, enum skb_state state) +{ + struct skb_data *entry = (struct skb_data *)newsk->cb; + + __skb_queue_tail(list, newsk); + entry->state = state; +} + +netdev_tx_t lan78xx_start_xmit(struct sk_buff *skb, struct net_device *net) +{ + struct lan78xx_net *dev = netdev_priv(net); + struct sk_buff *skb2 = NULL; + + if (skb) { + skb_tx_timestamp(skb); + skb2 = lan78xx_tx_prep(dev, skb, GFP_ATOMIC); + } + + if (skb2) { + skb_queue_tail(&dev->txq_pend, skb2); + + if (skb_queue_len(&dev->txq_pend) > 10) + netif_stop_queue(net); + } else { + netif_dbg(dev, tx_err, dev->net, + "lan78xx_tx_prep return NULL\n"); + dev->net->stats.tx_errors++; + dev->net->stats.tx_dropped++; + } + + tasklet_schedule(&dev->bh); + + return NETDEV_TX_OK; +} + +int lan78xx_get_endpoints(struct lan78xx_net *dev, struct usb_interface *intf) +{ + int tmp; + struct usb_host_interface *alt = NULL; + struct usb_host_endpoint *in = NULL, *out = NULL; + struct usb_host_endpoint *status = NULL; + + for (tmp = 0; tmp < intf->num_altsetting; tmp++) { + unsigned ep; + + in = NULL; + out = NULL; + status = NULL; + alt = intf->altsetting + tmp; + + for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) { + struct usb_host_endpoint *e; + int intr = 0; + + e = alt->endpoint + ep; + switch (e->desc.bmAttributes) { + case USB_ENDPOINT_XFER_INT: + if (!usb_endpoint_dir_in(&e->desc)) + continue; + intr = 1; + /* FALLTHROUGH */ + case USB_ENDPOINT_XFER_BULK: + break; + default: + continue; + } + if (usb_endpoint_dir_in(&e->desc)) { + if (!intr && !in) + in = e; + else if (intr && !status) + status = e; + } else { + if (!out) + out = e; + } + } + if (in && out) + break; + } + if (!alt || !in || !out) + return -EINVAL; + + dev->pipe_in = usb_rcvbulkpipe(dev->udev, + in->desc.bEndpointAddress & + USB_ENDPOINT_NUMBER_MASK); + dev->pipe_out = usb_sndbulkpipe(dev->udev, + out->desc.bEndpointAddress & + USB_ENDPOINT_NUMBER_MASK); + dev->ep_intr = status; + + return 0; +} + +static int lan78xx_bind(struct lan78xx_net *dev, struct usb_interface *intf) +{ + struct lan78xx_priv *pdata = NULL; + int ret; + int i; + + ret = lan78xx_get_endpoints(dev, intf); + + dev->data[0] = (unsigned long)kzalloc(sizeof(*pdata), GFP_KERNEL); + + pdata = (struct lan78xx_priv *)(dev->data[0]); + if (!pdata) { + netdev_warn(dev->net, "Unable to allocate lan78xx_priv"); + return -ENOMEM; + } + + pdata->dev = dev; + + spin_lock_init(&pdata->rfe_ctl_lock); + mutex_init(&pdata->dataport_mutex); + + INIT_WORK(&pdata->set_multicast, lan78xx_deferred_multicast_write); + + for (i = 0; i < DP_SEL_VHF_VLAN_LEN; i++) + pdata->vlan_table[i] = 0; + + INIT_WORK(&pdata->set_vlan, lan78xx_deferred_vlan_write); + + dev->net->features = 0; + + if (DEFAULT_TX_CSUM_ENABLE) + dev->net->features |= NETIF_F_HW_CSUM; + + if (DEFAULT_RX_CSUM_ENABLE) + dev->net->features |= NETIF_F_RXCSUM; + + if (DEFAULT_TSO_CSUM_ENABLE) + dev->net->features |= NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_SG; + + dev->net->hw_features = dev->net->features; + + /* Init all registers */ + ret = lan78xx_reset(dev); + + dev->net->flags |= IFF_MULTICAST; + + pdata->wol = WAKE_MAGIC; + + return 0; +} + +static void lan78xx_unbind(struct lan78xx_net *dev, struct usb_interface *intf) +{ + struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); + + if (pdata) { + netif_dbg(dev, ifdown, dev->net, "free pdata"); + kfree(pdata); + pdata = NULL; + dev->data[0] = 0; + } +} + +static void lan78xx_rx_csum_offload(struct lan78xx_net *dev, + struct sk_buff *skb, + u32 rx_cmd_a, u32 rx_cmd_b) +{ + if (!(dev->net->features & NETIF_F_RXCSUM) || + unlikely(rx_cmd_a & RX_CMD_A_ICSM_)) { + skb->ip_summed = CHECKSUM_NONE; + } else { + skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT_)); + skb->ip_summed = CHECKSUM_COMPLETE; + } +} + +void lan78xx_skb_return(struct lan78xx_net *dev, struct sk_buff *skb) +{ + int status; + + if (test_bit(EVENT_RX_PAUSED, &dev->flags)) { + skb_queue_tail(&dev->rxq_pause, skb); + return; + } + + skb->protocol = eth_type_trans(skb, dev->net); + dev->net->stats.rx_packets++; + dev->net->stats.rx_bytes += skb->len; + + netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n", + skb->len + sizeof(struct ethhdr), skb->protocol); + memset(skb->cb, 0, sizeof(struct skb_data)); + + if (skb_defer_rx_timestamp(skb)) + return; + + status = netif_rx(skb); + if (status != NET_RX_SUCCESS) + netif_dbg(dev, rx_err, dev->net, + "netif_rx status %d\n", status); +} + +static int lan78xx_rx(struct lan78xx_net *dev, struct sk_buff *skb) +{ + if (skb->len < dev->net->hard_header_len) + return 0; + + while (skb->len > 0) { + u32 rx_cmd_a, rx_cmd_b, align_count, size; + u16 rx_cmd_c; + struct sk_buff *skb2; + unsigned char *packet; + + memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a)); + le32_to_cpus(&rx_cmd_a); + skb_pull(skb, sizeof(rx_cmd_a)); + + memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b)); + le32_to_cpus(&rx_cmd_b); + skb_pull(skb, sizeof(rx_cmd_b)); + + memcpy(&rx_cmd_c, skb->data, sizeof(rx_cmd_c)); + le16_to_cpus(&rx_cmd_c); + skb_pull(skb, sizeof(rx_cmd_c)); + + packet = skb->data; + + /* get the packet length */ + size = (rx_cmd_a & RX_CMD_A_LEN_MASK_); + align_count = (4 - ((size + RXW_PADDING) % 4)) % 4; + + if (unlikely(rx_cmd_a & RX_CMD_A_RED_)) { + netif_dbg(dev, rx_err, dev->net, + "Error rx_cmd_a=0x%08x", rx_cmd_a); + } else { + /* last frame in this batch */ + if (skb->len == size) { + lan78xx_rx_csum_offload(dev, skb, + rx_cmd_a, rx_cmd_b); + + skb_trim(skb, skb->len - 4); /* remove fcs */ + skb->truesize = size + sizeof(struct sk_buff); + + return 1; + } + + skb2 = skb_clone(skb, GFP_ATOMIC); + if (unlikely(!skb2)) { + netdev_warn(dev->net, "Error allocating skb"); + return 0; + } + + skb2->len = size; + skb2->data = packet; + skb_set_tail_pointer(skb2, size); + + lan78xx_rx_csum_offload(dev, skb2, rx_cmd_a, rx_cmd_b); + + skb_trim(skb2, skb2->len - 4); /* remove fcs */ + skb2->truesize = size + sizeof(struct sk_buff); + + lan78xx_skb_return(dev, skb2); + } + + skb_pull(skb, size); + + /* padding bytes before the next frame starts */ + if (skb->len) + skb_pull(skb, align_count); + } + + if (unlikely(skb->len < 0)) { + netdev_warn(dev->net, "invalid rx length<0 %d", skb->len); + return 0; + } + + return 1; +} + +static inline void rx_process(struct lan78xx_net *dev, struct sk_buff *skb) +{ + if (!lan78xx_rx(dev, skb)) { + dev->net->stats.rx_errors++; + goto done; + } + + if (skb->len) { + lan78xx_skb_return(dev, skb); + return; + } + + netif_dbg(dev, rx_err, dev->net, "drop\n"); + dev->net->stats.rx_errors++; +done: + skb_queue_tail(&dev->done, skb); +} + +static void rx_complete(struct urb *urb); + +static int rx_submit(struct lan78xx_net *dev, struct urb *urb, gfp_t flags) +{ + struct sk_buff *skb; + struct skb_data *entry; + unsigned long lockflags; + size_t size = dev->rx_urb_size; + int ret = 0; + + skb = netdev_alloc_skb_ip_align(dev->net, size); + if (!skb) { + usb_free_urb(urb); + return -ENOMEM; + } + + entry = (struct skb_data *)skb->cb; + entry->urb = urb; + entry->dev = dev; + entry->length = 0; + + usb_fill_bulk_urb(urb, dev->udev, dev->pipe_in, + skb->data, size, rx_complete, skb); + + spin_lock_irqsave(&dev->rxq.lock, lockflags); + + if (netif_device_present(dev->net) && + netif_running(dev->net) && + !test_bit(EVENT_RX_HALT, &dev->flags) && + !test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { + ret = usb_submit_urb(urb, GFP_ATOMIC); + switch (ret) { + case 0: + lan78xx_queue_skb(&dev->rxq, skb, rx_start); + break; + case -EPIPE: + lan78xx_defer_kevent(dev, EVENT_RX_HALT); + break; + case -ENODEV: + netif_dbg(dev, ifdown, dev->net, "device gone\n"); + netif_device_detach(dev->net); + break; + case -EHOSTUNREACH: + ret = -ENOLINK; + break; + default: + netif_dbg(dev, rx_err, dev->net, + "rx submit, %d\n", ret); + tasklet_schedule(&dev->bh); + } + } else { + netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); + ret = -ENOLINK; + } + spin_unlock_irqrestore(&dev->rxq.lock, lockflags); + if (ret) { + dev_kfree_skb_any(skb); + usb_free_urb(urb); + } + return ret; +} + +static void rx_complete(struct urb *urb) +{ + struct sk_buff *skb = (struct sk_buff *)urb->context; + struct skb_data *entry = (struct skb_data *)skb->cb; + struct lan78xx_net *dev = entry->dev; + int urb_status = urb->status; + enum skb_state state; + + skb_put(skb, urb->actual_length); + state = rx_done; + entry->urb = NULL; + + switch (urb_status) { + case 0: + if (skb->len < dev->net->hard_header_len) { + state = rx_cleanup; + dev->net->stats.rx_errors++; + dev->net->stats.rx_length_errors++; + netif_dbg(dev, rx_err, dev->net, + "rx length %d\n", skb->len); + } + usb_mark_last_busy(dev->udev); + break; + case -EPIPE: + dev->net->stats.rx_errors++; + lan78xx_defer_kevent(dev, EVENT_RX_HALT); + /* FALLTHROUGH */ + case -ECONNRESET: /* async unlink */ + case -ESHUTDOWN: /* hardware gone */ + netif_dbg(dev, ifdown, dev->net, + "rx shutdown, code %d\n", urb_status); + state = rx_cleanup; + entry->urb = urb; + urb = NULL; + break; + case -EPROTO: + case -ETIME: + case -EILSEQ: + dev->net->stats.rx_errors++; + state = rx_cleanup; + entry->urb = urb; + urb = NULL; + break; + + /* data overrun ... flush fifo? */ + case -EOVERFLOW: + dev->net->stats.rx_over_errors++; + /* FALLTHROUGH */ + + default: + state = rx_cleanup; + dev->net->stats.rx_errors++; + netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); + break; + } + + state = defer_bh(dev, skb, &dev->rxq, state); + + if (urb) { + if (netif_running(dev->net) && + !test_bit(EVENT_RX_HALT, &dev->flags) && + state != unlink_start) { + rx_submit(dev, urb, GFP_ATOMIC); + return; + } + usb_free_urb(urb); + } + netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); +} + +static void lan78xx_tx_bh(struct lan78xx_net *dev) +{ + int length; + struct urb *urb = NULL; + struct skb_data *entry; + unsigned long flags; + struct sk_buff_head *tqp = &dev->txq_pend; + struct sk_buff *skb, *skb2; + int ret; + int count, pos; + int skb_totallen, pkt_cnt; + + skb_totallen = 0; + pkt_cnt = 0; + for (skb = tqp->next; pkt_cnt < tqp->qlen; skb = skb->next) { + if (skb_is_gso(skb)) { + if (pkt_cnt) { + /* handle previous packets first */ + break; + } + length = skb->len; + skb2 = skb_dequeue(tqp); + goto gso_skb; + } + + if ((skb_totallen + skb->len) > MAX_SINGLE_PACKET_SIZE) + break; + skb_totallen = skb->len + roundup(skb_totallen, sizeof(u32)); + pkt_cnt++; + } + + /* copy to a single skb */ + skb = alloc_skb(skb_totallen, GFP_ATOMIC); + if (!skb) + goto drop; + + skb_put(skb, skb_totallen); + + for (count = pos = 0; count < pkt_cnt; count++) { + skb2 = skb_dequeue(tqp); + if (skb2) { + memcpy(skb->data + pos, skb2->data, skb2->len); + pos += roundup(skb2->len, sizeof(u32)); + dev_kfree_skb(skb2); + } + } + + length = skb_totallen; + +gso_skb: + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) { + netif_dbg(dev, tx_err, dev->net, "no urb\n"); + goto drop; + } + + entry = (struct skb_data *)skb->cb; + entry->urb = urb; + entry->dev = dev; + entry->length = length; + + spin_lock_irqsave(&dev->txq.lock, flags); + ret = usb_autopm_get_interface_async(dev->intf); + if (ret < 0) { + spin_unlock_irqrestore(&dev->txq.lock, flags); + goto drop; + } + + usb_fill_bulk_urb(urb, dev->udev, dev->pipe_out, + skb->data, skb->len, tx_complete, skb); + + if (length % dev->maxpacket == 0) { + /* send USB_ZERO_PACKET */ + urb->transfer_flags |= URB_ZERO_PACKET; + } + +#ifdef CONFIG_PM + /* if this triggers the device is still a sleep */ + if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { + /* transmission will be done in resume */ + usb_anchor_urb(urb, &dev->deferred); + /* no use to process more packets */ + netif_stop_queue(dev->net); + usb_put_urb(urb); + spin_unlock_irqrestore(&dev->txq.lock, flags); + netdev_dbg(dev->net, "Delaying transmission for resumption\n"); + return; + } +#endif + + ret = usb_submit_urb(urb, GFP_ATOMIC); + switch (ret) { + case 0: + dev->net->trans_start = jiffies; + lan78xx_queue_skb(&dev->txq, skb, tx_start); + if (skb_queue_len(&dev->txq) >= dev->tx_qlen) + netif_stop_queue(dev->net); + break; + case -EPIPE: + netif_stop_queue(dev->net); + lan78xx_defer_kevent(dev, EVENT_TX_HALT); + usb_autopm_put_interface_async(dev->intf); + break; + default: + usb_autopm_put_interface_async(dev->intf); + netif_dbg(dev, tx_err, dev->net, + "tx: submit urb err %d\n", ret); + break; + } + + spin_unlock_irqrestore(&dev->txq.lock, flags); + + if (ret) { + netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", ret); +drop: + dev->net->stats.tx_dropped++; + if (skb) + dev_kfree_skb_any(skb); + usb_free_urb(urb); + } else + netif_dbg(dev, tx_queued, dev->net, + "> tx, len %d, type 0x%x\n", length, skb->protocol); +} + +static void lan78xx_rx_bh(struct lan78xx_net *dev) +{ + struct urb *urb; + int i; + + if (skb_queue_len(&dev->rxq) < dev->rx_qlen) { + for (i = 0; i < 10; i++) { + if (skb_queue_len(&dev->rxq) >= dev->rx_qlen) + break; + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (urb) + if (rx_submit(dev, urb, GFP_ATOMIC) == -ENOLINK) + return; + } + + if (skb_queue_len(&dev->rxq) < dev->rx_qlen) + tasklet_schedule(&dev->bh); + } + if (skb_queue_len(&dev->txq) < dev->tx_qlen) + netif_wake_queue(dev->net); +} + +static void lan78xx_bh(unsigned long param) +{ + struct lan78xx_net *dev = (struct lan78xx_net *)param; + struct sk_buff *skb; + struct skb_data *entry; + + while ((skb = skb_dequeue(&dev->done))) { + entry = (struct skb_data *)(skb->cb); + switch (entry->state) { + case rx_done: + entry->state = rx_cleanup; + rx_process(dev, skb); + continue; + case tx_done: + usb_free_urb(entry->urb); + dev_kfree_skb(skb); + continue; + case rx_cleanup: + usb_free_urb(entry->urb); + dev_kfree_skb(skb); + continue; + default: + netdev_dbg(dev->net, "skb state %d\n", entry->state); + return; + } + } + + if (netif_device_present(dev->net) && netif_running(dev->net)) { + if (!skb_queue_empty(&dev->txq_pend)) + lan78xx_tx_bh(dev); + + if (!timer_pending(&dev->delay) && + !test_bit(EVENT_RX_HALT, &dev->flags)) + lan78xx_rx_bh(dev); + } +} + +static void lan78xx_delayedwork(struct work_struct *work) +{ + int status; + struct lan78xx_net *dev; + + dev = container_of(work, struct lan78xx_net, wq.work); + + if (test_bit(EVENT_TX_HALT, &dev->flags)) { + unlink_urbs(dev, &dev->txq); + status = usb_autopm_get_interface(dev->intf); + if (status < 0) + goto fail_pipe; + status = usb_clear_halt(dev->udev, dev->pipe_out); + usb_autopm_put_interface(dev->intf); + if (status < 0 && + status != -EPIPE && + status != -ESHUTDOWN) { + if (netif_msg_tx_err(dev)) +fail_pipe: + netdev_err(dev->net, + "can't clear tx halt, status %d\n", + status); + } else { + clear_bit(EVENT_TX_HALT, &dev->flags); + if (status != -ESHUTDOWN) + netif_wake_queue(dev->net); + } + } + if (test_bit(EVENT_RX_HALT, &dev->flags)) { + unlink_urbs(dev, &dev->rxq); + status = usb_autopm_get_interface(dev->intf); + if (status < 0) + goto fail_halt; + status = usb_clear_halt(dev->udev, dev->pipe_in); + usb_autopm_put_interface(dev->intf); + if (status < 0 && + status != -EPIPE && + status != -ESHUTDOWN) { + if (netif_msg_rx_err(dev)) +fail_halt: + netdev_err(dev->net, + "can't clear rx halt, status %d\n", + status); + } else { + clear_bit(EVENT_RX_HALT, &dev->flags); + tasklet_schedule(&dev->bh); + } + } + + if (test_bit(EVENT_LINK_RESET, &dev->flags)) { + int ret = 0; + + clear_bit(EVENT_LINK_RESET, &dev->flags); + status = usb_autopm_get_interface(dev->intf); + if (status < 0) + goto skip_reset; + if (lan78xx_link_reset(dev) < 0) { + usb_autopm_put_interface(dev->intf); +skip_reset: + netdev_info(dev->net, "link reset failed (%d)\n", + ret); + } else { + usb_autopm_put_interface(dev->intf); + } + } +} + +static void intr_complete(struct urb *urb) +{ + struct lan78xx_net *dev = urb->context; + int status = urb->status; + + switch (status) { + /* success */ + case 0: + lan78xx_status(dev, urb); + break; + + /* software-driven interface shutdown */ + case -ENOENT: /* urb killed */ + case -ESHUTDOWN: /* hardware gone */ + netif_dbg(dev, ifdown, dev->net, + "intr shutdown, code %d\n", status); + return; + + /* NOTE: not throttling like RX/TX, since this endpoint + * already polls infrequently + */ + default: + netdev_dbg(dev->net, "intr status %d\n", status); + break; + } + + if (!netif_running(dev->net)) + return; + + memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); + status = usb_submit_urb(urb, GFP_ATOMIC); + if (status != 0) + netif_err(dev, timer, dev->net, + "intr resubmit --> %d\n", status); +} + +static void lan78xx_disconnect(struct usb_interface *intf) +{ + struct lan78xx_net *dev; + struct usb_device *udev; + struct net_device *net; + + dev = usb_get_intfdata(intf); + usb_set_intfdata(intf, NULL); + if (!dev) + return; + + udev = interface_to_usbdev(intf); + + net = dev->net; + unregister_netdev(net); + + cancel_delayed_work_sync(&dev->wq); + + usb_scuttle_anchored_urbs(&dev->deferred); + + lan78xx_unbind(dev, intf); + + usb_kill_urb(dev->urb_intr); + usb_free_urb(dev->urb_intr); + + free_netdev(net); + usb_put_dev(udev); +} + +void lan78xx_tx_timeout(struct net_device *net) +{ + struct lan78xx_net *dev = netdev_priv(net); + + unlink_urbs(dev, &dev->txq); + tasklet_schedule(&dev->bh); +} + +static const struct net_device_ops lan78xx_netdev_ops = { + .ndo_open = lan78xx_open, + .ndo_stop = lan78xx_stop, + .ndo_start_xmit = lan78xx_start_xmit, + .ndo_tx_timeout = lan78xx_tx_timeout, + .ndo_change_mtu = lan78xx_change_mtu, + .ndo_set_mac_address = lan78xx_set_mac_addr, + .ndo_validate_addr = eth_validate_addr, + .ndo_do_ioctl = lan78xx_ioctl, + .ndo_set_rx_mode = lan78xx_set_multicast, + .ndo_set_features = lan78xx_set_features, + .ndo_vlan_rx_add_vid = lan78xx_vlan_rx_add_vid, + .ndo_vlan_rx_kill_vid = lan78xx_vlan_rx_kill_vid, +}; + +static int lan78xx_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct lan78xx_net *dev; + struct net_device *netdev; + struct usb_device *udev; + int ret; + unsigned maxp; + unsigned period; + u8 *buf = NULL; + + udev = interface_to_usbdev(intf); + udev = usb_get_dev(udev); + + ret = -ENOMEM; + netdev = alloc_etherdev(sizeof(struct lan78xx_net)); + if (!netdev) { + dev_err(&intf->dev, "Error: OOM\n"); + goto out1; + } + + /* netdev_printk() needs this */ + SET_NETDEV_DEV(netdev, &intf->dev); + + dev = netdev_priv(netdev); + dev->udev = udev; + dev->intf = intf; + dev->net = netdev; + dev->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV + | NETIF_MSG_PROBE | NETIF_MSG_LINK); + + skb_queue_head_init(&dev->rxq); + skb_queue_head_init(&dev->txq); + skb_queue_head_init(&dev->done); + skb_queue_head_init(&dev->rxq_pause); + skb_queue_head_init(&dev->txq_pend); + mutex_init(&dev->phy_mutex); + + tasklet_init(&dev->bh, lan78xx_bh, (unsigned long)dev); + INIT_DELAYED_WORK(&dev->wq, lan78xx_delayedwork); + init_usb_anchor(&dev->deferred); + + netdev->netdev_ops = &lan78xx_netdev_ops; + netdev->watchdog_timeo = TX_TIMEOUT_JIFFIES; + netdev->ethtool_ops = &lan78xx_ethtool_ops; + + ret = lan78xx_bind(dev, intf); + if (ret < 0) + goto out2; + strcpy(netdev->name, "eth%d"); + + if (netdev->mtu > (dev->hard_mtu - netdev->hard_header_len)) + netdev->mtu = dev->hard_mtu - netdev->hard_header_len; + + dev->ep_blkin = (intf->cur_altsetting)->endpoint + 0; + dev->ep_blkout = (intf->cur_altsetting)->endpoint + 1; + dev->ep_intr = (intf->cur_altsetting)->endpoint + 2; + + dev->pipe_in = usb_rcvbulkpipe(udev, BULK_IN_PIPE); + dev->pipe_out = usb_sndbulkpipe(udev, BULK_OUT_PIPE); + + dev->pipe_intr = usb_rcvintpipe(dev->udev, + dev->ep_intr->desc.bEndpointAddress & + USB_ENDPOINT_NUMBER_MASK); + period = dev->ep_intr->desc.bInterval; + + maxp = usb_maxpacket(dev->udev, dev->pipe_intr, 0); + buf = kmalloc(maxp, GFP_KERNEL); + if (buf) { + dev->urb_intr = usb_alloc_urb(0, GFP_KERNEL); + if (!dev->urb_intr) { + kfree(buf); + goto out3; + } else { + usb_fill_int_urb(dev->urb_intr, dev->udev, + dev->pipe_intr, buf, maxp, + intr_complete, dev, period); + } + } + + dev->maxpacket = usb_maxpacket(dev->udev, dev->pipe_out, 1); + + /* driver requires remote-wakeup capability during autosuspend. */ + intf->needs_remote_wakeup = 1; + + ret = register_netdev(netdev); + if (ret != 0) { + netif_err(dev, probe, netdev, "couldn't register the device\n"); + goto out2; + } + + usb_set_intfdata(intf, dev); + + ret = device_set_wakeup_enable(&udev->dev, true); + + /* Default delay of 2sec has more overhead than advantage. + * Set to 10sec as default. + */ + pm_runtime_set_autosuspend_delay(&udev->dev, + DEFAULT_AUTOSUSPEND_DELAY); + + return 0; + +out3: + lan78xx_unbind(dev, intf); +out2: + free_netdev(netdev); +out1: + usb_put_dev(udev); + + return ret; +} + +static u16 lan78xx_wakeframe_crc16(const u8 *buf, int len) +{ + const u16 crc16poly = 0x8005; + int i; + u16 bit, crc, msb; + u8 data; + + crc = 0xFFFF; + for (i = 0; i < len; i++) { + data = *buf++; + for (bit = 0; bit < 8; bit++) { + msb = crc >> 15; + crc <<= 1; + + if (msb ^ (u16)(data & 1)) { + crc ^= crc16poly; + crc |= (u16)0x0001U; + } + data >>= 1; + } + } + + return crc; +} + +static int lan78xx_set_suspend(struct lan78xx_net *dev, u32 wol) +{ + u32 buf; + int ret; + int mask_index; + u16 crc; + u32 temp_wucsr; + u32 temp_pmt_ctl; + const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E }; + const u8 ipv6_multicast[3] = { 0x33, 0x33 }; + const u8 arp_type[2] = { 0x08, 0x06 }; + + ret = lan78xx_read_reg(dev, MAC_TX, &buf); + buf &= ~MAC_TX_TXEN_; + ret = lan78xx_write_reg(dev, MAC_TX, buf); + ret = lan78xx_read_reg(dev, MAC_RX, &buf); + buf &= ~MAC_RX_RXEN_; + ret = lan78xx_write_reg(dev, MAC_RX, buf); + + ret = lan78xx_write_reg(dev, WUCSR, 0); + ret = lan78xx_write_reg(dev, WUCSR2, 0); + ret = lan78xx_write_reg(dev, WK_SRC, 0xFFF1FF1FUL); + + temp_wucsr = 0; + + temp_pmt_ctl = 0; + ret = lan78xx_read_reg(dev, PMT_CTL, &temp_pmt_ctl); + temp_pmt_ctl &= ~PMT_CTL_RES_CLR_WKP_EN_; + temp_pmt_ctl |= PMT_CTL_RES_CLR_WKP_STS_; + + for (mask_index = 0; mask_index < NUM_OF_WUF_CFG; mask_index++) + ret = lan78xx_write_reg(dev, WUF_CFG(mask_index), 0); + + mask_index = 0; + if (wol & WAKE_PHY) { + temp_pmt_ctl |= PMT_CTL_PHY_WAKE_EN_; + + temp_pmt_ctl |= PMT_CTL_WOL_EN_; + temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; + temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_; + } + if (wol & WAKE_MAGIC) { + temp_wucsr |= WUCSR_MPEN_; + + temp_pmt_ctl |= PMT_CTL_WOL_EN_; + temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; + temp_pmt_ctl |= PMT_CTL_SUS_MODE_3_; + } + if (wol & WAKE_BCAST) { + temp_wucsr |= WUCSR_BCST_EN_; + + temp_pmt_ctl |= PMT_CTL_WOL_EN_; + temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; + temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_; + } + if (wol & WAKE_MCAST) { + temp_wucsr |= WUCSR_WAKE_EN_; + + /* set WUF_CFG & WUF_MASK for IPv4 Multicast */ + crc = lan78xx_wakeframe_crc16(ipv4_multicast, 3); + ret = lan78xx_write_reg(dev, WUF_CFG(mask_index), + WUF_CFGX_EN_ | + WUF_CFGX_TYPE_MCAST_ | + (0 << WUF_CFGX_OFFSET_SHIFT_) | + (crc & WUF_CFGX_CRC16_MASK_)); + + ret = lan78xx_write_reg(dev, WUF_MASK0(mask_index), 7); + ret = lan78xx_write_reg(dev, WUF_MASK1(mask_index), 0); + ret = lan78xx_write_reg(dev, WUF_MASK2(mask_index), 0); + ret = lan78xx_write_reg(dev, WUF_MASK3(mask_index), 0); + mask_index++; + + /* for IPv6 Multicast */ + crc = lan78xx_wakeframe_crc16(ipv6_multicast, 2); + ret = lan78xx_write_reg(dev, WUF_CFG(mask_index), + WUF_CFGX_EN_ | + WUF_CFGX_TYPE_MCAST_ | + (0 << WUF_CFGX_OFFSET_SHIFT_) | + (crc & WUF_CFGX_CRC16_MASK_)); + + ret = lan78xx_write_reg(dev, WUF_MASK0(mask_index), 3); + ret = lan78xx_write_reg(dev, WUF_MASK1(mask_index), 0); + ret = lan78xx_write_reg(dev, WUF_MASK2(mask_index), 0); + ret = lan78xx_write_reg(dev, WUF_MASK3(mask_index), 0); + mask_index++; + + temp_pmt_ctl |= PMT_CTL_WOL_EN_; + temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; + temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_; + } + if (wol & WAKE_UCAST) { + temp_wucsr |= WUCSR_PFDA_EN_; + + temp_pmt_ctl |= PMT_CTL_WOL_EN_; + temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; + temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_; + } + if (wol & WAKE_ARP) { + temp_wucsr |= WUCSR_WAKE_EN_; + + /* set WUF_CFG & WUF_MASK + * for packettype (offset 12,13) = ARP (0x0806) + */ + crc = lan78xx_wakeframe_crc16(arp_type, 2); + ret = lan78xx_write_reg(dev, WUF_CFG(mask_index), + WUF_CFGX_EN_ | + WUF_CFGX_TYPE_ALL_ | + (0 << WUF_CFGX_OFFSET_SHIFT_) | + (crc & WUF_CFGX_CRC16_MASK_)); + + ret = lan78xx_write_reg(dev, WUF_MASK0(mask_index), 0x3000); + ret = lan78xx_write_reg(dev, WUF_MASK1(mask_index), 0); + ret = lan78xx_write_reg(dev, WUF_MASK2(mask_index), 0); + ret = lan78xx_write_reg(dev, WUF_MASK3(mask_index), 0); + mask_index++; + + temp_pmt_ctl |= PMT_CTL_WOL_EN_; + temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; + temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_; + } + + ret = lan78xx_write_reg(dev, WUCSR, temp_wucsr); + + /* when multiple WOL bits are set */ + if (hweight_long((unsigned long)wol) > 1) { + temp_pmt_ctl |= PMT_CTL_WOL_EN_; + temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; + temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_; + } + ret = lan78xx_write_reg(dev, PMT_CTL, temp_pmt_ctl); + + /* clear WUPS */ + ret = lan78xx_read_reg(dev, PMT_CTL, &buf); + buf |= PMT_CTL_WUPS_MASK_; + ret = lan78xx_write_reg(dev, PMT_CTL, buf); + + ret = lan78xx_read_reg(dev, MAC_RX, &buf); + buf |= MAC_RX_RXEN_; + ret = lan78xx_write_reg(dev, MAC_RX, buf); + + return 0; +} + +int lan78xx_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct lan78xx_net *dev = usb_get_intfdata(intf); + struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); + u32 buf; + int ret; + int event; + + ret = 0; + event = message.event; + + if (!dev->suspend_count++) { + spin_lock_irq(&dev->txq.lock); + /* don't autosuspend while transmitting */ + if ((skb_queue_len(&dev->txq) || + skb_queue_len(&dev->txq_pend)) && + PMSG_IS_AUTO(message)) { + spin_unlock_irq(&dev->txq.lock); + ret = -EBUSY; + goto out; + } else { + set_bit(EVENT_DEV_ASLEEP, &dev->flags); + spin_unlock_irq(&dev->txq.lock); + } + + /* stop TX & RX */ + ret = lan78xx_read_reg(dev, MAC_TX, &buf); + buf &= ~MAC_TX_TXEN_; + ret = lan78xx_write_reg(dev, MAC_TX, buf); + ret = lan78xx_read_reg(dev, MAC_RX, &buf); + buf &= ~MAC_RX_RXEN_; + ret = lan78xx_write_reg(dev, MAC_RX, buf); + + /* empty out the rx and queues */ + netif_device_detach(dev->net); + lan78xx_terminate_urbs(dev); + usb_kill_urb(dev->urb_intr); + + /* reattach */ + netif_device_attach(dev->net); + } + + if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { + if (PMSG_IS_AUTO(message)) { + /* auto suspend (selective suspend) */ + ret = lan78xx_read_reg(dev, MAC_TX, &buf); + buf &= ~MAC_TX_TXEN_; + ret = lan78xx_write_reg(dev, MAC_TX, buf); + ret = lan78xx_read_reg(dev, MAC_RX, &buf); + buf &= ~MAC_RX_RXEN_; + ret = lan78xx_write_reg(dev, MAC_RX, buf); + + ret = lan78xx_write_reg(dev, WUCSR, 0); + ret = lan78xx_write_reg(dev, WUCSR2, 0); + ret = lan78xx_write_reg(dev, WK_SRC, 0xFFF1FF1FUL); + + /* set goodframe wakeup */ + ret = lan78xx_read_reg(dev, WUCSR, &buf); + + buf |= WUCSR_RFE_WAKE_EN_; + buf |= WUCSR_STORE_WAKE_; + + ret = lan78xx_write_reg(dev, WUCSR, buf); + + ret = lan78xx_read_reg(dev, PMT_CTL, &buf); + + buf &= ~PMT_CTL_RES_CLR_WKP_EN_; + buf |= PMT_CTL_RES_CLR_WKP_STS_; + + buf |= PMT_CTL_PHY_WAKE_EN_; + buf |= PMT_CTL_WOL_EN_; + buf &= ~PMT_CTL_SUS_MODE_MASK_; + buf |= PMT_CTL_SUS_MODE_3_; + + ret = lan78xx_write_reg(dev, PMT_CTL, buf); + + ret = lan78xx_read_reg(dev, PMT_CTL, &buf); + + buf |= PMT_CTL_WUPS_MASK_; + + ret = lan78xx_write_reg(dev, PMT_CTL, buf); + + ret = lan78xx_read_reg(dev, MAC_RX, &buf); + buf |= MAC_RX_RXEN_; + ret = lan78xx_write_reg(dev, MAC_RX, buf); + } else { + lan78xx_set_suspend(dev, pdata->wol); + } + } + +out: + return ret; +} + +int lan78xx_resume(struct usb_interface *intf) +{ + struct lan78xx_net *dev = usb_get_intfdata(intf); + struct sk_buff *skb; + struct urb *res; + int ret; + u32 buf; + + if (!--dev->suspend_count) { + /* resume interrupt URBs */ + if (dev->urb_intr && test_bit(EVENT_DEV_OPEN, &dev->flags)) + usb_submit_urb(dev->urb_intr, GFP_NOIO); + + spin_lock_irq(&dev->txq.lock); + while ((res = usb_get_from_anchor(&dev->deferred))) { + skb = (struct sk_buff *)res->context; + ret = usb_submit_urb(res, GFP_ATOMIC); + if (ret < 0) { + dev_kfree_skb_any(skb); + usb_free_urb(res); + usb_autopm_put_interface_async(dev->intf); + } else { + dev->net->trans_start = jiffies; + lan78xx_queue_skb(&dev->txq, skb, tx_start); + } + } + + clear_bit(EVENT_DEV_ASLEEP, &dev->flags); + spin_unlock_irq(&dev->txq.lock); + + if (test_bit(EVENT_DEV_OPEN, &dev->flags)) { + if (!(skb_queue_len(&dev->txq) >= dev->tx_qlen)) + netif_start_queue(dev->net); + tasklet_schedule(&dev->bh); + } + } + + ret = lan78xx_write_reg(dev, WUCSR2, 0); + ret = lan78xx_write_reg(dev, WUCSR, 0); + ret = lan78xx_write_reg(dev, WK_SRC, 0xFFF1FF1FUL); + + ret = lan78xx_write_reg(dev, WUCSR2, WUCSR2_NS_RCD_ | + WUCSR2_ARP_RCD_ | + WUCSR2_IPV6_TCPSYN_RCD_ | + WUCSR2_IPV4_TCPSYN_RCD_); + + ret = lan78xx_write_reg(dev, WUCSR, WUCSR_EEE_TX_WAKE_ | + WUCSR_EEE_RX_WAKE_ | + WUCSR_PFDA_FR_ | + WUCSR_RFE_WAKE_FR_ | + WUCSR_WUFR_ | + WUCSR_MPR_ | + WUCSR_BCST_FR_); + + ret = lan78xx_read_reg(dev, MAC_TX, &buf); + buf |= MAC_TX_TXEN_; + ret = lan78xx_write_reg(dev, MAC_TX, buf); + + return 0; +} + +int lan78xx_reset_resume(struct usb_interface *intf) +{ + struct lan78xx_net *dev = usb_get_intfdata(intf); + + lan78xx_reset(dev); + return lan78xx_resume(intf); +} + +static const struct usb_device_id products[] = { + { + /* LAN7800 USB Gigabit Ethernet Device */ + USB_DEVICE(LAN78XX_USB_VENDOR_ID, LAN7800_USB_PRODUCT_ID), + }, + { + /* LAN7850 USB Gigabit Ethernet Device */ + USB_DEVICE(LAN78XX_USB_VENDOR_ID, LAN7850_USB_PRODUCT_ID), + }, + {}, +}; +MODULE_DEVICE_TABLE(usb, products); + +static struct usb_driver lan78xx_driver = { + .name = DRIVER_NAME, + .id_table = products, + .probe = lan78xx_probe, + .disconnect = lan78xx_disconnect, + .suspend = lan78xx_suspend, + .resume = lan78xx_resume, + .reset_resume = lan78xx_reset_resume, + .supports_autosuspend = 1, + .disable_hub_initiated_lpm = 1, +}; + +module_usb_driver(lan78xx_driver); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); |