diff options
Diffstat (limited to 'drivers/net/usb/lan78xx.c')
| -rw-r--r-- | drivers/net/usb/lan78xx.c | 5075 |
1 files changed, 5075 insertions, 0 deletions
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c new file mode 100644 index 000000000..c458c030f --- /dev/null +++ b/drivers/net/usb/lan78xx.c @@ -0,0 +1,5075 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2015 Microchip Technology + */ +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.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/linkmode.h> +#include <linux/list.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/mdio.h> +#include <linux/phy.h> +#include <net/ip6_checksum.h> +#include <net/vxlan.h> +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/irq.h> +#include <linux/irqchip/chained_irq.h> +#include <linux/microchipphy.h> +#include <linux/phy_fixed.h> +#include <linux/of_mdio.h> +#include <linux/of_net.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 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 FLOW_THRESHOLD(n) ((((n) + 511) / 512) & 0x7F) +#define FLOW_CTRL_THRESHOLD(on, off) ((FLOW_THRESHOLD(on) << 0) | \ + (FLOW_THRESHOLD(off) << 8)) + +/* Flow control turned on when Rx FIFO level rises above this level (bytes) */ +#define FLOW_ON_SS 9216 +#define FLOW_ON_HS 8704 + +/* Flow control turned off when Rx FIFO level falls below this level (bytes) */ +#define FLOW_OFF_SS 4096 +#define FLOW_OFF_HS 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 DEFAULT_VLAN_RX_OFFLOAD (true) +#define TX_ALIGNMENT (4) +#define RXW_PADDING 2 + +#define LAN78XX_USB_VENDOR_ID (0x0424) +#define LAN7800_USB_PRODUCT_ID (0x7800) +#define LAN7850_USB_PRODUCT_ID (0x7850) +#define LAN7801_USB_PRODUCT_ID (0x7801) +#define LAN78XX_EEPROM_MAGIC (0x78A5) +#define LAN78XX_OTP_MAGIC (0x78F3) +#define AT29M2AF_USB_VENDOR_ID (0x07C9) +#define AT29M2AF_USB_PRODUCT_ID (0x0012) + +#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) + +#define TX_URB_NUM 10 +#define TX_SS_URB_NUM TX_URB_NUM +#define TX_HS_URB_NUM TX_URB_NUM +#define TX_FS_URB_NUM TX_URB_NUM + +/* A single URB buffer must be large enough to hold a complete jumbo packet + */ +#define TX_SS_URB_SIZE (32 * 1024) +#define TX_HS_URB_SIZE (16 * 1024) +#define TX_FS_URB_SIZE (10 * 1024) + +#define RX_SS_URB_NUM 30 +#define RX_HS_URB_NUM 10 +#define RX_FS_URB_NUM 10 +#define RX_SS_URB_SIZE TX_SS_URB_SIZE +#define RX_HS_URB_SIZE TX_HS_URB_SIZE +#define RX_FS_URB_SIZE TX_FS_URB_SIZE + +#define SS_BURST_CAP_SIZE RX_SS_URB_SIZE +#define SS_BULK_IN_DELAY 0x2000 +#define HS_BURST_CAP_SIZE RX_HS_URB_SIZE +#define HS_BULK_IN_DELAY 0x2000 +#define FS_BURST_CAP_SIZE RX_FS_URB_SIZE +#define FS_BULK_IN_DELAY 0x2000 + +#define TX_CMD_LEN 8 +#define TX_SKB_MIN_LEN (TX_CMD_LEN + ETH_HLEN) +#define LAN78XX_TSO_SIZE(dev) ((dev)->tx_urb_size - TX_SKB_MIN_LEN) + +#define RX_CMD_LEN 10 +#define RX_SKB_MIN_LEN (RX_CMD_LEN + ETH_HLEN) +#define RX_MAX_FRAME_LEN(mtu) ((mtu) + ETH_HLEN + VLAN_HLEN) + +/* USB related defines */ +#define BULK_IN_PIPE 1 +#define BULK_OUT_PIPE 2 + +/* default autosuspend delay (mSec)*/ +#define DEFAULT_AUTOSUSPEND_DELAY (10 * 1000) + +/* statistic update interval (mSec) */ +#define STAT_UPDATE_TIMER (1 * 1000) + +/* time to wait for MAC or FCT to stop (jiffies) */ +#define HW_DISABLE_TIMEOUT (HZ / 10) + +/* time to wait between polling MAC or FCT state (ms) */ +#define HW_DISABLE_DELAY_MS 1 + +/* defines interrupts from interrupt EP */ +#define MAX_INT_EP (32) +#define INT_EP_INTEP (31) +#define INT_EP_OTP_WR_DONE (28) +#define INT_EP_EEE_TX_LPI_START (26) +#define INT_EP_EEE_TX_LPI_STOP (25) +#define INT_EP_EEE_RX_LPI (24) +#define INT_EP_MAC_RESET_TIMEOUT (23) +#define INT_EP_RDFO (22) +#define INT_EP_TXE (21) +#define INT_EP_USB_STATUS (20) +#define INT_EP_TX_DIS (19) +#define INT_EP_RX_DIS (18) +#define INT_EP_PHY (17) +#define INT_EP_DP (16) +#define INT_EP_MAC_ERR (15) +#define INT_EP_TDFU (14) +#define INT_EP_TDFO (13) +#define INT_EP_UTX (12) +#define INT_EP_GPIO_11 (11) +#define INT_EP_GPIO_10 (10) +#define INT_EP_GPIO_9 (9) +#define INT_EP_GPIO_8 (8) +#define INT_EP_GPIO_7 (7) +#define INT_EP_GPIO_6 (6) +#define INT_EP_GPIO_5 (5) +#define INT_EP_GPIO_4 (4) +#define INT_EP_GPIO_3 (3) +#define INT_EP_GPIO_2 (2) +#define INT_EP_GPIO_1 (1) +#define INT_EP_GPIO_0 (0) + +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_statstage64 { + u64 rx_fcs_errors; + u64 rx_alignment_errors; + u64 rx_fragment_errors; + u64 rx_jabber_errors; + u64 rx_undersize_frame_errors; + u64 rx_oversize_frame_errors; + u64 rx_dropped_frames; + u64 rx_unicast_byte_count; + u64 rx_broadcast_byte_count; + u64 rx_multicast_byte_count; + u64 rx_unicast_frames; + u64 rx_broadcast_frames; + u64 rx_multicast_frames; + u64 rx_pause_frames; + u64 rx_64_byte_frames; + u64 rx_65_127_byte_frames; + u64 rx_128_255_byte_frames; + u64 rx_256_511_bytes_frames; + u64 rx_512_1023_byte_frames; + u64 rx_1024_1518_byte_frames; + u64 rx_greater_1518_byte_frames; + u64 eee_rx_lpi_transitions; + u64 eee_rx_lpi_time; + u64 tx_fcs_errors; + u64 tx_excess_deferral_errors; + u64 tx_carrier_errors; + u64 tx_bad_byte_count; + u64 tx_single_collisions; + u64 tx_multiple_collisions; + u64 tx_excessive_collision; + u64 tx_late_collisions; + u64 tx_unicast_byte_count; + u64 tx_broadcast_byte_count; + u64 tx_multicast_byte_count; + u64 tx_unicast_frames; + u64 tx_broadcast_frames; + u64 tx_multicast_frames; + u64 tx_pause_frames; + u64 tx_64_byte_frames; + u64 tx_65_127_byte_frames; + u64 tx_128_255_byte_frames; + u64 tx_256_511_bytes_frames; + u64 tx_512_1023_byte_frames; + u64 tx_1024_1518_byte_frames; + u64 tx_greater_1518_byte_frames; + u64 eee_tx_lpi_transitions; + u64 eee_tx_lpi_time; +}; + +static u32 lan78xx_regs[] = { + ID_REV, + INT_STS, + HW_CFG, + PMT_CTL, + E2P_CMD, + E2P_DATA, + USB_STATUS, + VLAN_TYPE, + MAC_CR, + MAC_RX, + MAC_TX, + FLOW, + ERR_STS, + MII_ACC, + MII_DATA, + EEE_TX_LPI_REQ_DLY, + EEE_TW_TX_SYS, + EEE_TX_LPI_REM_DLY, + WUCSR +}; + +#define PHY_REG_SIZE (32 * sizeof(u32)) + +struct lan78xx_net; + +struct lan78xx_priv { + struct lan78xx_net *dev; + u32 rfe_ctl; + u32 mchash_table[DP_SEL_VHF_HASH_LEN]; /* multicast 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; + int num_of_packet; +}; + +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 +#define EVENT_STAT_UPDATE 9 +#define EVENT_DEV_DISCONNECT 10 + +struct statstage { + struct mutex access_lock; /* for stats access */ + struct lan78xx_statstage saved; + struct lan78xx_statstage rollover_count; + struct lan78xx_statstage rollover_max; + struct lan78xx_statstage64 curr_stat; +}; + +struct irq_domain_data { + struct irq_domain *irqdomain; + unsigned int phyirq; + struct irq_chip *irqchip; + irq_flow_handler_t irq_handler; + u32 irqenable; + struct mutex irq_lock; /* for irq bus access */ +}; + +struct lan78xx_net { + struct net_device *net; + struct usb_device *udev; + struct usb_interface *intf; + void *driver_priv; + + unsigned int tx_pend_data_len; + size_t n_tx_urbs; + size_t n_rx_urbs; + size_t tx_urb_size; + size_t rx_urb_size; + + struct sk_buff_head rxq_free; + struct sk_buff_head rxq; + struct sk_buff_head rxq_done; + struct sk_buff_head rxq_overflow; + struct sk_buff_head txq_free; + struct sk_buff_head txq; + struct sk_buff_head txq_pend; + + struct napi_struct napi; + + struct delayed_work wq; + + int msg_enable; + + struct urb *urb_intr; + struct usb_anchor deferred; + + struct mutex dev_mutex; /* serialise open/stop wrt suspend/resume */ + struct mutex phy_mutex; /* for phy access */ + unsigned int pipe_in, pipe_out, pipe_intr; + + unsigned int bulk_in_delay; + unsigned int burst_cap; + + unsigned long flags; + + wait_queue_head_t *wait; + unsigned char suspend_count; + + unsigned int maxpacket; + struct timer_list stat_monitor; + + unsigned long data[5]; + + int link_on; + u8 mdix_ctrl; + + u32 chipid; + u32 chiprev; + struct mii_bus *mdiobus; + phy_interface_t interface; + + int fc_autoneg; + u8 fc_request_control; + + int delta; + struct statstage stats; + + struct irq_domain_data domain_data; +}; + +/* define external phy id */ +#define PHY_LAN8835 (0x0007C130) +#define PHY_KSZ9031RNX (0x00221620) + +/* 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 struct sk_buff *lan78xx_get_buf(struct sk_buff_head *buf_pool) +{ + if (skb_queue_empty(buf_pool)) + return NULL; + + return skb_dequeue(buf_pool); +} + +static void lan78xx_release_buf(struct sk_buff_head *buf_pool, + struct sk_buff *buf) +{ + buf->data = buf->head; + skb_reset_tail_pointer(buf); + + buf->len = 0; + buf->data_len = 0; + + skb_queue_tail(buf_pool, buf); +} + +static void lan78xx_free_buf_pool(struct sk_buff_head *buf_pool) +{ + struct skb_data *entry; + struct sk_buff *buf; + + while (!skb_queue_empty(buf_pool)) { + buf = skb_dequeue(buf_pool); + if (buf) { + entry = (struct skb_data *)buf->cb; + usb_free_urb(entry->urb); + dev_kfree_skb_any(buf); + } + } +} + +static int lan78xx_alloc_buf_pool(struct sk_buff_head *buf_pool, + size_t n_urbs, size_t urb_size, + struct lan78xx_net *dev) +{ + struct skb_data *entry; + struct sk_buff *buf; + struct urb *urb; + int i; + + skb_queue_head_init(buf_pool); + + for (i = 0; i < n_urbs; i++) { + buf = alloc_skb(urb_size, GFP_ATOMIC); + if (!buf) + goto error; + + if (skb_linearize(buf) != 0) { + dev_kfree_skb_any(buf); + goto error; + } + + urb = usb_alloc_urb(0, GFP_ATOMIC); + if (!urb) { + dev_kfree_skb_any(buf); + goto error; + } + + entry = (struct skb_data *)buf->cb; + entry->urb = urb; + entry->dev = dev; + entry->length = 0; + entry->num_of_packet = 0; + + skb_queue_tail(buf_pool, buf); + } + + return 0; + +error: + lan78xx_free_buf_pool(buf_pool); + + return -ENOMEM; +} + +static struct sk_buff *lan78xx_get_rx_buf(struct lan78xx_net *dev) +{ + return lan78xx_get_buf(&dev->rxq_free); +} + +static void lan78xx_release_rx_buf(struct lan78xx_net *dev, + struct sk_buff *rx_buf) +{ + lan78xx_release_buf(&dev->rxq_free, rx_buf); +} + +static void lan78xx_free_rx_resources(struct lan78xx_net *dev) +{ + lan78xx_free_buf_pool(&dev->rxq_free); +} + +static int lan78xx_alloc_rx_resources(struct lan78xx_net *dev) +{ + return lan78xx_alloc_buf_pool(&dev->rxq_free, + dev->n_rx_urbs, dev->rx_urb_size, dev); +} + +static struct sk_buff *lan78xx_get_tx_buf(struct lan78xx_net *dev) +{ + return lan78xx_get_buf(&dev->txq_free); +} + +static void lan78xx_release_tx_buf(struct lan78xx_net *dev, + struct sk_buff *tx_buf) +{ + lan78xx_release_buf(&dev->txq_free, tx_buf); +} + +static void lan78xx_free_tx_resources(struct lan78xx_net *dev) +{ + lan78xx_free_buf_pool(&dev->txq_free); +} + +static int lan78xx_alloc_tx_resources(struct lan78xx_net *dev) +{ + return lan78xx_alloc_buf_pool(&dev->txq_free, + dev->n_tx_urbs, dev->tx_urb_size, dev); +} + +static int lan78xx_read_reg(struct lan78xx_net *dev, u32 index, u32 *data) +{ + u32 *buf; + int ret; + + if (test_bit(EVENT_DEV_DISCONNECT, &dev->flags)) + return -ENODEV; + + buf = kmalloc(sizeof(u32), GFP_KERNEL); + 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 if (net_ratelimit()) { + 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; + int ret; + + if (test_bit(EVENT_DEV_DISCONNECT, &dev->flags)) + return -ENODEV; + + buf = kmalloc(sizeof(u32), GFP_KERNEL); + 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) && + net_ratelimit()) { + netdev_warn(dev->net, + "Failed to write register index 0x%08x. ret = %d", + index, ret); + } + + kfree(buf); + + return ret; +} + +static int lan78xx_update_reg(struct lan78xx_net *dev, u32 reg, u32 mask, + u32 data) +{ + int ret; + u32 buf; + + ret = lan78xx_read_reg(dev, reg, &buf); + if (ret < 0) + return ret; + + buf &= ~mask; + buf |= (mask & data); + + ret = lan78xx_write_reg(dev, reg, buf); + if (ret < 0) + return ret; + + return 0; +} + +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 = %d", ret); + } + + kfree(stats); + + return ret; +} + +#define check_counter_rollover(struct1, dev_stats, member) \ + do { \ + if ((struct1)->member < (dev_stats).saved.member) \ + (dev_stats).rollover_count.member++; \ + } while (0) + +static void lan78xx_check_stat_rollover(struct lan78xx_net *dev, + struct lan78xx_statstage *stats) +{ + check_counter_rollover(stats, dev->stats, rx_fcs_errors); + check_counter_rollover(stats, dev->stats, rx_alignment_errors); + check_counter_rollover(stats, dev->stats, rx_fragment_errors); + check_counter_rollover(stats, dev->stats, rx_jabber_errors); + check_counter_rollover(stats, dev->stats, rx_undersize_frame_errors); + check_counter_rollover(stats, dev->stats, rx_oversize_frame_errors); + check_counter_rollover(stats, dev->stats, rx_dropped_frames); + check_counter_rollover(stats, dev->stats, rx_unicast_byte_count); + check_counter_rollover(stats, dev->stats, rx_broadcast_byte_count); + check_counter_rollover(stats, dev->stats, rx_multicast_byte_count); + check_counter_rollover(stats, dev->stats, rx_unicast_frames); + check_counter_rollover(stats, dev->stats, rx_broadcast_frames); + check_counter_rollover(stats, dev->stats, rx_multicast_frames); + check_counter_rollover(stats, dev->stats, rx_pause_frames); + check_counter_rollover(stats, dev->stats, rx_64_byte_frames); + check_counter_rollover(stats, dev->stats, rx_65_127_byte_frames); + check_counter_rollover(stats, dev->stats, rx_128_255_byte_frames); + check_counter_rollover(stats, dev->stats, rx_256_511_bytes_frames); + check_counter_rollover(stats, dev->stats, rx_512_1023_byte_frames); + check_counter_rollover(stats, dev->stats, rx_1024_1518_byte_frames); + check_counter_rollover(stats, dev->stats, rx_greater_1518_byte_frames); + check_counter_rollover(stats, dev->stats, eee_rx_lpi_transitions); + check_counter_rollover(stats, dev->stats, eee_rx_lpi_time); + check_counter_rollover(stats, dev->stats, tx_fcs_errors); + check_counter_rollover(stats, dev->stats, tx_excess_deferral_errors); + check_counter_rollover(stats, dev->stats, tx_carrier_errors); + check_counter_rollover(stats, dev->stats, tx_bad_byte_count); + check_counter_rollover(stats, dev->stats, tx_single_collisions); + check_counter_rollover(stats, dev->stats, tx_multiple_collisions); + check_counter_rollover(stats, dev->stats, tx_excessive_collision); + check_counter_rollover(stats, dev->stats, tx_late_collisions); + check_counter_rollover(stats, dev->stats, tx_unicast_byte_count); + check_counter_rollover(stats, dev->stats, tx_broadcast_byte_count); + check_counter_rollover(stats, dev->stats, tx_multicast_byte_count); + check_counter_rollover(stats, dev->stats, tx_unicast_frames); + check_counter_rollover(stats, dev->stats, tx_broadcast_frames); + check_counter_rollover(stats, dev->stats, tx_multicast_frames); + check_counter_rollover(stats, dev->stats, tx_pause_frames); + check_counter_rollover(stats, dev->stats, tx_64_byte_frames); + check_counter_rollover(stats, dev->stats, tx_65_127_byte_frames); + check_counter_rollover(stats, dev->stats, tx_128_255_byte_frames); + check_counter_rollover(stats, dev->stats, tx_256_511_bytes_frames); + check_counter_rollover(stats, dev->stats, tx_512_1023_byte_frames); + check_counter_rollover(stats, dev->stats, tx_1024_1518_byte_frames); + check_counter_rollover(stats, dev->stats, tx_greater_1518_byte_frames); + check_counter_rollover(stats, dev->stats, eee_tx_lpi_transitions); + check_counter_rollover(stats, dev->stats, eee_tx_lpi_time); + + memcpy(&dev->stats.saved, stats, sizeof(struct lan78xx_statstage)); +} + +static void lan78xx_update_stats(struct lan78xx_net *dev) +{ + u32 *p, *count, *max; + u64 *data; + int i; + struct lan78xx_statstage lan78xx_stats; + + if (usb_autopm_get_interface(dev->intf) < 0) + return; + + p = (u32 *)&lan78xx_stats; + count = (u32 *)&dev->stats.rollover_count; + max = (u32 *)&dev->stats.rollover_max; + data = (u64 *)&dev->stats.curr_stat; + + mutex_lock(&dev->stats.access_lock); + + if (lan78xx_read_stats(dev, &lan78xx_stats) > 0) + lan78xx_check_stat_rollover(dev, &lan78xx_stats); + + for (i = 0; i < (sizeof(lan78xx_stats) / (sizeof(u32))); i++) + data[i] = (u64)p[i] + ((u64)count[i] * ((u64)max[i] + 1)); + + mutex_unlock(&dev->stats.access_lock); + + usb_autopm_put_interface(dev->intf); +} + +/* 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_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; + u32 saved; + int i, ret; + int retval; + + /* depends on chip, some EEPROM pins are muxed with LED function. + * disable & restore LED function to access EEPROM. + */ + ret = lan78xx_read_reg(dev, HW_CFG, &val); + saved = val; + if (dev->chipid == ID_REV_CHIP_ID_7800_) { + val &= ~(HW_CFG_LED1_EN_ | HW_CFG_LED0_EN_); + ret = lan78xx_write_reg(dev, HW_CFG, val); + } + + retval = lan78xx_eeprom_confirm_not_busy(dev); + if (retval) + return retval; + + 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)) { + retval = -EIO; + goto exit; + } + + retval = lan78xx_wait_eeprom(dev); + if (retval < 0) + goto exit; + + ret = lan78xx_read_reg(dev, E2P_DATA, &val); + if (unlikely(ret < 0)) { + retval = -EIO; + goto exit; + } + + data[i] = val & 0xFF; + offset++; + } + + retval = 0; +exit: + if (dev->chipid == ID_REV_CHIP_ID_7800_) + ret = lan78xx_write_reg(dev, HW_CFG, saved); + + return retval; +} + +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; + u32 saved; + int i, ret; + int retval; + + /* depends on chip, some EEPROM pins are muxed with LED function. + * disable & restore LED function to access EEPROM. + */ + ret = lan78xx_read_reg(dev, HW_CFG, &val); + saved = val; + if (dev->chipid == ID_REV_CHIP_ID_7800_) { + val &= ~(HW_CFG_LED1_EN_ | HW_CFG_LED0_EN_); + ret = lan78xx_write_reg(dev, HW_CFG, val); + } + + retval = lan78xx_eeprom_confirm_not_busy(dev); + if (retval) + goto exit; + + /* 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)) { + retval = -EIO; + goto exit; + } + + retval = lan78xx_wait_eeprom(dev); + if (retval < 0) + goto exit; + + for (i = 0; i < length; i++) { + /* Fill data register */ + val = data[i]; + ret = lan78xx_write_reg(dev, E2P_DATA, val); + if (ret < 0) { + retval = -EIO; + goto exit; + } + + /* 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) { + retval = -EIO; + goto exit; + } + + retval = lan78xx_wait_eeprom(dev); + if (retval < 0) + goto exit; + + offset++; + } + + retval = 0; +exit: + if (dev->chipid == ID_REV_CHIP_ID_7800_) + ret = lan78xx_write_reg(dev, HW_CFG, saved); + + return retval; +} + +static int lan78xx_read_raw_otp(struct lan78xx_net *dev, u32 offset, + u32 length, u8 *data) +{ + int i; + u32 buf; + unsigned long timeout; + + lan78xx_read_reg(dev, OTP_PWR_DN, &buf); + + if (buf & OTP_PWR_DN_PWRDN_N_) { + /* clear it and wait to be cleared */ + lan78xx_write_reg(dev, OTP_PWR_DN, 0); + + timeout = jiffies + HZ; + do { + usleep_range(1, 10); + 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++) { + lan78xx_write_reg(dev, OTP_ADDR1, + ((offset + i) >> 8) & OTP_ADDR1_15_11); + lan78xx_write_reg(dev, OTP_ADDR2, + ((offset + i) & OTP_ADDR2_10_3)); + + lan78xx_write_reg(dev, OTP_FUNC_CMD, OTP_FUNC_CMD_READ_); + lan78xx_write_reg(dev, OTP_CMD_GO, OTP_CMD_GO_GO_); + + timeout = jiffies + HZ; + do { + udelay(1); + 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_); + + lan78xx_read_reg(dev, OTP_RD_DATA, &buf); + + data[i] = (u8)(buf & 0xFF); + } + + return 0; +} + +static int lan78xx_write_raw_otp(struct lan78xx_net *dev, u32 offset, + u32 length, u8 *data) +{ + int i; + u32 buf; + unsigned long timeout; + + lan78xx_read_reg(dev, OTP_PWR_DN, &buf); + + if (buf & OTP_PWR_DN_PWRDN_N_) { + /* clear it and wait to be cleared */ + lan78xx_write_reg(dev, OTP_PWR_DN, 0); + + timeout = jiffies + HZ; + do { + udelay(1); + lan78xx_read_reg(dev, OTP_PWR_DN, &buf); + if (time_after(jiffies, timeout)) { + netdev_warn(dev->net, + "timeout on OTP_PWR_DN completion"); + return -EIO; + } + } while (buf & OTP_PWR_DN_PWRDN_N_); + } + + /* set to BYTE program mode */ + lan78xx_write_reg(dev, OTP_PRGM_MODE, OTP_PRGM_MODE_BYTE_); + + for (i = 0; i < length; i++) { + lan78xx_write_reg(dev, OTP_ADDR1, + ((offset + i) >> 8) & OTP_ADDR1_15_11); + lan78xx_write_reg(dev, OTP_ADDR2, + ((offset + i) & OTP_ADDR2_10_3)); + lan78xx_write_reg(dev, OTP_PRGM_DATA, data[i]); + lan78xx_write_reg(dev, OTP_TST_CMD, OTP_TST_CMD_PRGVRFY_); + lan78xx_write_reg(dev, OTP_CMD_GO, OTP_CMD_GO_GO_); + + timeout = jiffies + HZ; + do { + udelay(1); + lan78xx_read_reg(dev, OTP_STATUS, &buf); + if (time_after(jiffies, timeout)) { + netdev_warn(dev->net, + "Timeout on OTP_STATUS completion"); + return -EIO; + } + } while (buf & OTP_STATUS_BUSY_); + } + + 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_2) + offset += 0x100; + else if (sig != OTP_INDICATOR_1) + ret = -EINVAL; + if (!ret) + 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, "%s timed out", __func__); + + 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; + + 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++) { + lan78xx_write_reg(dev, MAF_HI(i), 0); + lan78xx_write_reg(dev, MAF_LO(i), + pdata->pfilter_table[i][1]); + lan78xx_write_reg(dev, MAF_HI(i), + pdata->pfilter_table[i][0]); + } + + 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] = 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; + u8 cap; + + if (dev->fc_autoneg) + cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); + else + cap = dev->fc_request_control; + + 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 = FLOW_CTRL_THRESHOLD(FLOW_ON_SS, FLOW_OFF_SS); + else if (dev->udev->speed == USB_SPEED_HIGH) + fct_flow = FLOW_CTRL_THRESHOLD(FLOW_ON_HS, FLOW_OFF_HS); + + netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s", + (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), + (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); + + lan78xx_write_reg(dev, FCT_FLOW, fct_flow); + + /* threshold value should be set before enabling flow */ + lan78xx_write_reg(dev, FLOW, flow); + + return 0; +} + +static void lan78xx_rx_urb_submit_all(struct lan78xx_net *dev); + +static int lan78xx_mac_reset(struct lan78xx_net *dev) +{ + unsigned long start_time = jiffies; + u32 val; + int ret; + + mutex_lock(&dev->phy_mutex); + + /* Resetting the device while there is activity on the MDIO + * bus can result in the MAC interface locking up and not + * completing register access transactions. + */ + ret = lan78xx_phy_wait_not_busy(dev); + if (ret < 0) + goto done; + + ret = lan78xx_read_reg(dev, MAC_CR, &val); + if (ret < 0) + goto done; + + val |= MAC_CR_RST_; + ret = lan78xx_write_reg(dev, MAC_CR, val); + if (ret < 0) + goto done; + + /* Wait for the reset to complete before allowing any further + * MAC register accesses otherwise the MAC may lock up. + */ + do { + ret = lan78xx_read_reg(dev, MAC_CR, &val); + if (ret < 0) + goto done; + + if (!(val & MAC_CR_RST_)) { + ret = 0; + goto done; + } + } while (!time_after(jiffies, start_time + HZ)); + + ret = -ETIMEDOUT; +done: + mutex_unlock(&dev->phy_mutex); + + return ret; +} + +static int lan78xx_link_reset(struct lan78xx_net *dev) +{ + struct phy_device *phydev = dev->net->phydev; + struct ethtool_link_ksettings ecmd; + int ladv, radv, ret, link; + u32 buf; + + /* clear LAN78xx interrupt status */ + ret = lan78xx_write_reg(dev, INT_STS, INT_STS_PHY_INT_); + if (unlikely(ret < 0)) + return ret; + + mutex_lock(&phydev->lock); + phy_read_status(phydev); + link = phydev->link; + mutex_unlock(&phydev->lock); + + if (!link && dev->link_on) { + dev->link_on = false; + + /* reset MAC */ + ret = lan78xx_mac_reset(dev); + if (ret < 0) + return ret; + + del_timer(&dev->stat_monitor); + } else if (link && !dev->link_on) { + dev->link_on = true; + + phy_ethtool_ksettings_get(phydev, &ecmd); + + if (dev->udev->speed == USB_SPEED_SUPER) { + if (ecmd.base.speed == 1000) { + /* disable U2 */ + ret = lan78xx_read_reg(dev, USB_CFG1, &buf); + if (ret < 0) + return ret; + buf &= ~USB_CFG1_DEV_U2_INIT_EN_; + ret = lan78xx_write_reg(dev, USB_CFG1, buf); + if (ret < 0) + return ret; + /* enable U1 */ + ret = lan78xx_read_reg(dev, USB_CFG1, &buf); + if (ret < 0) + return ret; + buf |= USB_CFG1_DEV_U1_INIT_EN_; + ret = lan78xx_write_reg(dev, USB_CFG1, buf); + if (ret < 0) + return ret; + } else { + /* enable U1 & U2 */ + ret = lan78xx_read_reg(dev, USB_CFG1, &buf); + if (ret < 0) + return ret; + buf |= USB_CFG1_DEV_U2_INIT_EN_; + buf |= USB_CFG1_DEV_U1_INIT_EN_; + ret = lan78xx_write_reg(dev, USB_CFG1, buf); + if (ret < 0) + return ret; + } + } + + ladv = phy_read(phydev, MII_ADVERTISE); + if (ladv < 0) + return ladv; + + radv = phy_read(phydev, MII_LPA); + if (radv < 0) + return radv; + + netif_dbg(dev, link, dev->net, + "speed: %u duplex: %d anadv: 0x%04x anlpa: 0x%04x", + ecmd.base.speed, ecmd.base.duplex, ladv, radv); + + ret = lan78xx_update_flowcontrol(dev, ecmd.base.duplex, ladv, + radv); + if (ret < 0) + return ret; + + if (!timer_pending(&dev->stat_monitor)) { + dev->delta = 1; + mod_timer(&dev->stat_monitor, + jiffies + STAT_UPDATE_TIMER); + } + + lan78xx_rx_urb_submit_all(dev); + + napi_schedule(&dev->napi); + } + + return 0; +} + +/* 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. + */ +static 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; + } + + intdata = get_unaligned_le32(urb->transfer_buffer); + + 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); + + if (dev->domain_data.phyirq > 0) + generic_handle_irq_safe(dev->domain_data.phyirq); + } 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); + int ret; + + ret = usb_autopm_get_interface(dev->intf); + if (ret) + return ret; + + ee->magic = LAN78XX_EEPROM_MAGIC; + + ret = lan78xx_read_raw_eeprom(dev, ee->offset, ee->len, data); + + usb_autopm_put_interface(dev->intf); + + return ret; +} + +static int lan78xx_ethtool_set_eeprom(struct net_device *netdev, + struct ethtool_eeprom *ee, u8 *data) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + int ret; + + ret = usb_autopm_get_interface(dev->intf); + if (ret) + return ret; + + /* Invalid EEPROM_INDICATOR at offset zero will result in a failure + * to load data from EEPROM + */ + if (ee->magic == LAN78XX_EEPROM_MAGIC) + ret = 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)) + ret = lan78xx_write_raw_otp(dev, ee->offset, ee->len, data); + + usb_autopm_put_interface(dev->intf); + + return ret; +} + +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); + + lan78xx_update_stats(dev); + + mutex_lock(&dev->stats.access_lock); + memcpy(data, &dev->stats.curr_stat, sizeof(dev->stats.curr_stat)); + mutex_unlock(&dev->stats.access_lock); +} + +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; + + if (wol->wolopts & ~WAKE_ALL) + return -EINVAL; + + pdata->wol = wol->wolopts; + + device_set_wakeup_enable(&dev->udev->dev, (bool)wol->wolopts); + + phy_ethtool_set_wol(netdev->phydev, wol); + + 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); + struct phy_device *phydev = net->phydev; + int ret; + u32 buf; + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + return ret; + + ret = phy_ethtool_get_eee(phydev, edata); + if (ret < 0) + goto exit; + + ret = lan78xx_read_reg(dev, MAC_CR, &buf); + if (buf & MAC_CR_EEE_EN_) { + edata->eee_enabled = true; + edata->eee_active = !!(edata->advertised & + edata->lp_advertised); + 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 { + edata->eee_enabled = false; + edata->eee_active = false; + edata->tx_lpi_enabled = false; + edata->tx_lpi_timer = 0; + } + + ret = 0; +exit: + usb_autopm_put_interface(dev->intf); + + return ret; +} + +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); + + phy_ethtool_set_eee(net->phydev, edata); + + buf = (u32)edata->tx_lpi_timer; + ret = lan78xx_write_reg(dev, EEE_TX_LPI_REQ_DLY, 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) +{ + u32 link; + + mutex_lock(&net->phydev->lock); + phy_read_status(net->phydev); + link = net->phydev->link; + mutex_unlock(&net->phydev->lock); + + return link; +} + +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)); + 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_link_ksettings(struct net_device *net, + struct ethtool_link_ksettings *cmd) +{ + struct lan78xx_net *dev = netdev_priv(net); + struct phy_device *phydev = net->phydev; + int ret; + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + return ret; + + phy_ethtool_ksettings_get(phydev, cmd); + + usb_autopm_put_interface(dev->intf); + + return ret; +} + +static int lan78xx_set_link_ksettings(struct net_device *net, + const struct ethtool_link_ksettings *cmd) +{ + struct lan78xx_net *dev = netdev_priv(net); + struct phy_device *phydev = net->phydev; + int ret = 0; + int temp; + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + return ret; + + /* change speed & duplex */ + ret = phy_ethtool_ksettings_set(phydev, cmd); + + if (!cmd->base.autoneg) { + /* force link down */ + temp = phy_read(phydev, MII_BMCR); + phy_write(phydev, MII_BMCR, temp | BMCR_LOOPBACK); + mdelay(1); + phy_write(phydev, MII_BMCR, temp); + } + + usb_autopm_put_interface(dev->intf); + + return ret; +} + +static void lan78xx_get_pause(struct net_device *net, + struct ethtool_pauseparam *pause) +{ + struct lan78xx_net *dev = netdev_priv(net); + struct phy_device *phydev = net->phydev; + struct ethtool_link_ksettings ecmd; + + phy_ethtool_ksettings_get(phydev, &ecmd); + + pause->autoneg = dev->fc_autoneg; + + if (dev->fc_request_control & FLOW_CTRL_TX) + pause->tx_pause = 1; + + if (dev->fc_request_control & FLOW_CTRL_RX) + pause->rx_pause = 1; +} + +static int lan78xx_set_pause(struct net_device *net, + struct ethtool_pauseparam *pause) +{ + struct lan78xx_net *dev = netdev_priv(net); + struct phy_device *phydev = net->phydev; + struct ethtool_link_ksettings ecmd; + int ret; + + phy_ethtool_ksettings_get(phydev, &ecmd); + + if (pause->autoneg && !ecmd.base.autoneg) { + ret = -EINVAL; + goto exit; + } + + dev->fc_request_control = 0; + if (pause->rx_pause) + dev->fc_request_control |= FLOW_CTRL_RX; + + if (pause->tx_pause) + dev->fc_request_control |= FLOW_CTRL_TX; + + if (ecmd.base.autoneg) { + __ETHTOOL_DECLARE_LINK_MODE_MASK(fc) = { 0, }; + u32 mii_adv; + + linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, + ecmd.link_modes.advertising); + linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, + ecmd.link_modes.advertising); + mii_adv = (u32)mii_advertise_flowctrl(dev->fc_request_control); + mii_adv_to_linkmode_adv_t(fc, mii_adv); + linkmode_or(ecmd.link_modes.advertising, fc, + ecmd.link_modes.advertising); + + phy_ethtool_ksettings_set(phydev, &ecmd); + } + + dev->fc_autoneg = pause->autoneg; + + ret = 0; +exit: + return ret; +} + +static int lan78xx_get_regs_len(struct net_device *netdev) +{ + if (!netdev->phydev) + return (sizeof(lan78xx_regs)); + else + return (sizeof(lan78xx_regs) + PHY_REG_SIZE); +} + +static void +lan78xx_get_regs(struct net_device *netdev, struct ethtool_regs *regs, + void *buf) +{ + u32 *data = buf; + int i, j; + struct lan78xx_net *dev = netdev_priv(netdev); + + /* Read Device/MAC registers */ + for (i = 0; i < ARRAY_SIZE(lan78xx_regs); i++) + lan78xx_read_reg(dev, lan78xx_regs[i], &data[i]); + + if (!netdev->phydev) + return; + + /* Read PHY registers */ + for (j = 0; j < 32; i++, j++) + data[i] = phy_read(netdev->phydev, j); +} + +static const struct ethtool_ops lan78xx_ethtool_ops = { + .get_link = lan78xx_get_link, + .nway_reset = phy_ethtool_nway_reset, + .get_drvinfo = lan78xx_get_drvinfo, + .get_msglevel = lan78xx_get_msglevel, + .set_msglevel = lan78xx_set_msglevel, + .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_ts_info = ethtool_op_get_ts_info, + .get_eee = lan78xx_get_eee, + .set_eee = lan78xx_set_eee, + .get_pauseparam = lan78xx_get_pause, + .set_pauseparam = lan78xx_set_pause, + .get_link_ksettings = lan78xx_get_link_ksettings, + .set_link_ksettings = lan78xx_set_link_ksettings, + .get_regs_len = lan78xx_get_regs_len, + .get_regs = lan78xx_get_regs, +}; + +static void lan78xx_init_mac_address(struct lan78xx_net *dev) +{ + u32 addr_lo, addr_hi; + u8 addr[6]; + + lan78xx_read_reg(dev, RX_ADDRL, &addr_lo); + 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)) { + if (!eth_platform_get_mac_address(&dev->udev->dev, addr)) { + /* valid address present in Device Tree */ + netif_dbg(dev, ifup, dev->net, + "MAC address read from Device Tree"); + } else if (((lan78xx_read_eeprom(dev, EEPROM_MAC_OFFSET, + ETH_ALEN, addr) == 0) || + (lan78xx_read_otp(dev, EEPROM_MAC_OFFSET, + ETH_ALEN, addr) == 0)) && + 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 */ + eth_random_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); + + lan78xx_write_reg(dev, RX_ADDRL, addr_lo); + lan78xx_write_reg(dev, RX_ADDRH, addr_hi); + } + + lan78xx_write_reg(dev, MAF_LO(0), addr_lo); + lan78xx_write_reg(dev, MAF_HI(0), addr_hi | MAF_HI_VALID_); + + eth_hw_addr_set(dev->net, addr); +} + +/* MDIO read and write wrappers for phylib */ +static int lan78xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) +{ + struct lan78xx_net *dev = bus->priv; + 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) */ + 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 int lan78xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, + u16 regval) +{ + struct lan78xx_net *dev = bus->priv; + 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; + + val = (u32)regval; + ret = lan78xx_write_reg(dev, MII_DATA, val); + + /* set the address, index & direction (write to PHY) */ + 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); + return 0; +} + +static int lan78xx_mdio_init(struct lan78xx_net *dev) +{ + struct device_node *node; + int ret; + + dev->mdiobus = mdiobus_alloc(); + if (!dev->mdiobus) { + netdev_err(dev->net, "can't allocate MDIO bus\n"); + return -ENOMEM; + } + + dev->mdiobus->priv = (void *)dev; + dev->mdiobus->read = lan78xx_mdiobus_read; + dev->mdiobus->write = lan78xx_mdiobus_write; + dev->mdiobus->name = "lan78xx-mdiobus"; + dev->mdiobus->parent = &dev->udev->dev; + + snprintf(dev->mdiobus->id, MII_BUS_ID_SIZE, "usb-%03d:%03d", + dev->udev->bus->busnum, dev->udev->devnum); + + switch (dev->chipid) { + case ID_REV_CHIP_ID_7800_: + case ID_REV_CHIP_ID_7850_: + /* set to internal PHY id */ + dev->mdiobus->phy_mask = ~(1 << 1); + break; + case ID_REV_CHIP_ID_7801_: + /* scan thru PHYAD[2..0] */ + dev->mdiobus->phy_mask = ~(0xFF); + break; + } + + node = of_get_child_by_name(dev->udev->dev.of_node, "mdio"); + ret = of_mdiobus_register(dev->mdiobus, node); + of_node_put(node); + if (ret) { + netdev_err(dev->net, "can't register MDIO bus\n"); + goto exit1; + } + + netdev_dbg(dev->net, "registered mdiobus bus %s\n", dev->mdiobus->id); + return 0; +exit1: + mdiobus_free(dev->mdiobus); + return ret; +} + +static void lan78xx_remove_mdio(struct lan78xx_net *dev) +{ + mdiobus_unregister(dev->mdiobus); + mdiobus_free(dev->mdiobus); +} + +static void lan78xx_link_status_change(struct net_device *net) +{ + struct phy_device *phydev = net->phydev; + + phy_print_status(phydev); +} + +static int irq_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hwirq) +{ + struct irq_domain_data *data = d->host_data; + + irq_set_chip_data(irq, data); + irq_set_chip_and_handler(irq, data->irqchip, data->irq_handler); + irq_set_noprobe(irq); + + return 0; +} + +static void irq_unmap(struct irq_domain *d, unsigned int irq) +{ + irq_set_chip_and_handler(irq, NULL, NULL); + irq_set_chip_data(irq, NULL); +} + +static const struct irq_domain_ops chip_domain_ops = { + .map = irq_map, + .unmap = irq_unmap, +}; + +static void lan78xx_irq_mask(struct irq_data *irqd) +{ + struct irq_domain_data *data = irq_data_get_irq_chip_data(irqd); + + data->irqenable &= ~BIT(irqd_to_hwirq(irqd)); +} + +static void lan78xx_irq_unmask(struct irq_data *irqd) +{ + struct irq_domain_data *data = irq_data_get_irq_chip_data(irqd); + + data->irqenable |= BIT(irqd_to_hwirq(irqd)); +} + +static void lan78xx_irq_bus_lock(struct irq_data *irqd) +{ + struct irq_domain_data *data = irq_data_get_irq_chip_data(irqd); + + mutex_lock(&data->irq_lock); +} + +static void lan78xx_irq_bus_sync_unlock(struct irq_data *irqd) +{ + struct irq_domain_data *data = irq_data_get_irq_chip_data(irqd); + struct lan78xx_net *dev = + container_of(data, struct lan78xx_net, domain_data); + u32 buf; + + /* call register access here because irq_bus_lock & irq_bus_sync_unlock + * are only two callbacks executed in non-atomic contex. + */ + lan78xx_read_reg(dev, INT_EP_CTL, &buf); + if (buf != data->irqenable) + lan78xx_write_reg(dev, INT_EP_CTL, data->irqenable); + + mutex_unlock(&data->irq_lock); +} + +static struct irq_chip lan78xx_irqchip = { + .name = "lan78xx-irqs", + .irq_mask = lan78xx_irq_mask, + .irq_unmask = lan78xx_irq_unmask, + .irq_bus_lock = lan78xx_irq_bus_lock, + .irq_bus_sync_unlock = lan78xx_irq_bus_sync_unlock, +}; + +static int lan78xx_setup_irq_domain(struct lan78xx_net *dev) +{ + struct device_node *of_node; + struct irq_domain *irqdomain; + unsigned int irqmap = 0; + u32 buf; + int ret = 0; + + of_node = dev->udev->dev.parent->of_node; + + mutex_init(&dev->domain_data.irq_lock); + + lan78xx_read_reg(dev, INT_EP_CTL, &buf); + dev->domain_data.irqenable = buf; + + dev->domain_data.irqchip = &lan78xx_irqchip; + dev->domain_data.irq_handler = handle_simple_irq; + + irqdomain = irq_domain_add_simple(of_node, MAX_INT_EP, 0, + &chip_domain_ops, &dev->domain_data); + if (irqdomain) { + /* create mapping for PHY interrupt */ + irqmap = irq_create_mapping(irqdomain, INT_EP_PHY); + if (!irqmap) { + irq_domain_remove(irqdomain); + + irqdomain = NULL; + ret = -EINVAL; + } + } else { + ret = -EINVAL; + } + + dev->domain_data.irqdomain = irqdomain; + dev->domain_data.phyirq = irqmap; + + return ret; +} + +static void lan78xx_remove_irq_domain(struct lan78xx_net *dev) +{ + if (dev->domain_data.phyirq > 0) { + irq_dispose_mapping(dev->domain_data.phyirq); + + if (dev->domain_data.irqdomain) + irq_domain_remove(dev->domain_data.irqdomain); + } + dev->domain_data.phyirq = 0; + dev->domain_data.irqdomain = NULL; +} + +static int lan8835_fixup(struct phy_device *phydev) +{ + int buf; + struct lan78xx_net *dev = netdev_priv(phydev->attached_dev); + + /* LED2/PME_N/IRQ_N/RGMII_ID pin to IRQ_N mode */ + buf = phy_read_mmd(phydev, MDIO_MMD_PCS, 0x8010); + buf &= ~0x1800; + buf |= 0x0800; + phy_write_mmd(phydev, MDIO_MMD_PCS, 0x8010, buf); + + /* RGMII MAC TXC Delay Enable */ + lan78xx_write_reg(dev, MAC_RGMII_ID, + MAC_RGMII_ID_TXC_DELAY_EN_); + + /* RGMII TX DLL Tune Adjust */ + lan78xx_write_reg(dev, RGMII_TX_BYP_DLL, 0x3D00); + + dev->interface = PHY_INTERFACE_MODE_RGMII_TXID; + + return 1; +} + +static int ksz9031rnx_fixup(struct phy_device *phydev) +{ + struct lan78xx_net *dev = netdev_priv(phydev->attached_dev); + + /* Micrel9301RNX PHY configuration */ + /* RGMII Control Signal Pad Skew */ + phy_write_mmd(phydev, MDIO_MMD_WIS, 4, 0x0077); + /* RGMII RX Data Pad Skew */ + phy_write_mmd(phydev, MDIO_MMD_WIS, 5, 0x7777); + /* RGMII RX Clock Pad Skew */ + phy_write_mmd(phydev, MDIO_MMD_WIS, 8, 0x1FF); + + dev->interface = PHY_INTERFACE_MODE_RGMII_RXID; + + return 1; +} + +static struct phy_device *lan7801_phy_init(struct lan78xx_net *dev) +{ + u32 buf; + int ret; + struct fixed_phy_status fphy_status = { + .link = 1, + .speed = SPEED_1000, + .duplex = DUPLEX_FULL, + }; + struct phy_device *phydev; + + phydev = phy_find_first(dev->mdiobus); + if (!phydev) { + netdev_dbg(dev->net, "PHY Not Found!! Registering Fixed PHY\n"); + phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL); + if (IS_ERR(phydev)) { + netdev_err(dev->net, "No PHY/fixed_PHY found\n"); + return NULL; + } + netdev_dbg(dev->net, "Registered FIXED PHY\n"); + dev->interface = PHY_INTERFACE_MODE_RGMII; + ret = lan78xx_write_reg(dev, MAC_RGMII_ID, + MAC_RGMII_ID_TXC_DELAY_EN_); + ret = lan78xx_write_reg(dev, RGMII_TX_BYP_DLL, 0x3D00); + ret = lan78xx_read_reg(dev, HW_CFG, &buf); + buf |= HW_CFG_CLK125_EN_; + buf |= HW_CFG_REFCLK25_EN_; + ret = lan78xx_write_reg(dev, HW_CFG, buf); + } else { + if (!phydev->drv) { + netdev_err(dev->net, "no PHY driver found\n"); + return NULL; + } + dev->interface = PHY_INTERFACE_MODE_RGMII; + /* external PHY fixup for KSZ9031RNX */ + ret = phy_register_fixup_for_uid(PHY_KSZ9031RNX, 0xfffffff0, + ksz9031rnx_fixup); + if (ret < 0) { + netdev_err(dev->net, "Failed to register fixup for PHY_KSZ9031RNX\n"); + return NULL; + } + /* external PHY fixup for LAN8835 */ + ret = phy_register_fixup_for_uid(PHY_LAN8835, 0xfffffff0, + lan8835_fixup); + if (ret < 0) { + netdev_err(dev->net, "Failed to register fixup for PHY_LAN8835\n"); + return NULL; + } + /* add more external PHY fixup here if needed */ + + phydev->is_internal = false; + } + return phydev; +} + +static int lan78xx_phy_init(struct lan78xx_net *dev) +{ + __ETHTOOL_DECLARE_LINK_MODE_MASK(fc) = { 0, }; + int ret; + u32 mii_adv; + struct phy_device *phydev; + + switch (dev->chipid) { + case ID_REV_CHIP_ID_7801_: + phydev = lan7801_phy_init(dev); + if (!phydev) { + netdev_err(dev->net, "lan7801: PHY Init Failed"); + return -EIO; + } + break; + + case ID_REV_CHIP_ID_7800_: + case ID_REV_CHIP_ID_7850_: + phydev = phy_find_first(dev->mdiobus); + if (!phydev) { + netdev_err(dev->net, "no PHY found\n"); + return -EIO; + } + phydev->is_internal = true; + dev->interface = PHY_INTERFACE_MODE_GMII; + break; + + default: + netdev_err(dev->net, "Unknown CHIP ID found\n"); + return -EIO; + } + + /* if phyirq is not set, use polling mode in phylib */ + if (dev->domain_data.phyirq > 0) + phydev->irq = dev->domain_data.phyirq; + else + phydev->irq = PHY_POLL; + netdev_dbg(dev->net, "phydev->irq = %d\n", phydev->irq); + + /* set to AUTOMDIX */ + phydev->mdix = ETH_TP_MDI_AUTO; + + ret = phy_connect_direct(dev->net, phydev, + lan78xx_link_status_change, + dev->interface); + if (ret) { + netdev_err(dev->net, "can't attach PHY to %s\n", + dev->mdiobus->id); + if (dev->chipid == ID_REV_CHIP_ID_7801_) { + if (phy_is_pseudo_fixed_link(phydev)) { + fixed_phy_unregister(phydev); + } else { + phy_unregister_fixup_for_uid(PHY_KSZ9031RNX, + 0xfffffff0); + phy_unregister_fixup_for_uid(PHY_LAN8835, + 0xfffffff0); + } + } + return -EIO; + } + + /* MAC doesn't support 1000T Half */ + phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT); + + /* support both flow controls */ + dev->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX); + linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, + phydev->advertising); + linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, + phydev->advertising); + mii_adv = (u32)mii_advertise_flowctrl(dev->fc_request_control); + mii_adv_to_linkmode_adv_t(fc, mii_adv); + linkmode_or(phydev->advertising, fc, phydev->advertising); + + if (phydev->mdio.dev.of_node) { + u32 reg; + int len; + + len = of_property_count_elems_of_size(phydev->mdio.dev.of_node, + "microchip,led-modes", + sizeof(u32)); + if (len >= 0) { + /* Ensure the appropriate LEDs are enabled */ + lan78xx_read_reg(dev, HW_CFG, ®); + reg &= ~(HW_CFG_LED0_EN_ | + HW_CFG_LED1_EN_ | + HW_CFG_LED2_EN_ | + HW_CFG_LED3_EN_); + reg |= (len > 0) * HW_CFG_LED0_EN_ | + (len > 1) * HW_CFG_LED1_EN_ | + (len > 2) * HW_CFG_LED2_EN_ | + (len > 3) * HW_CFG_LED3_EN_; + lan78xx_write_reg(dev, HW_CFG, reg); + } + } + + genphy_config_aneg(phydev); + + dev->fc_autoneg = phydev->autoneg; + + return 0; +} + +static int lan78xx_set_rx_max_frame_length(struct lan78xx_net *dev, int size) +{ + u32 buf; + bool rxenabled; + + lan78xx_read_reg(dev, MAC_RX, &buf); + + rxenabled = ((buf & MAC_RX_RXEN_) != 0); + + if (rxenabled) { + buf &= ~MAC_RX_RXEN_; + 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_); + + lan78xx_write_reg(dev, MAC_RX, buf); + + if (rxenabled) { + buf |= MAC_RX_RXEN_; + 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 max_frame_len = RX_MAX_FRAME_LEN(new_mtu); + int ret; + + /* no second zero-length packet read wanted after mtu-sized packets */ + if ((max_frame_len % dev->maxpacket) == 0) + return -EDOM; + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + return ret; + + ret = lan78xx_set_rx_max_frame_length(dev, max_frame_len); + if (!ret) + netdev->mtu = new_mtu; + + usb_autopm_put_interface(dev->intf); + + return ret; +} + +static 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; + + if (netif_running(netdev)) + return -EBUSY; + + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; + + eth_hw_addr_set(netdev, 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; + + lan78xx_write_reg(dev, RX_ADDRL, addr_lo); + lan78xx_write_reg(dev, RX_ADDRH, addr_hi); + + /* Added to support MAC address changes */ + lan78xx_write_reg(dev, MAF_LO(0), addr_lo); + lan78xx_write_reg(dev, MAF_HI(0), addr_hi | MAF_HI_VALID_); + + 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; + + 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_STRIP_; + else + pdata->rfe_ctl &= ~RFE_CTL_VLAN_STRIP_; + + if (features & NETIF_F_HW_VLAN_CTAG_FILTER) + pdata->rfe_ctl |= RFE_CTL_VLAN_FILTER_; + else + pdata->rfe_ctl &= ~RFE_CTL_VLAN_FILTER_; + + spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags); + + 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_urb_config_init(struct lan78xx_net *dev) +{ + int result = 0; + + switch (dev->udev->speed) { + case USB_SPEED_SUPER: + dev->rx_urb_size = RX_SS_URB_SIZE; + dev->tx_urb_size = TX_SS_URB_SIZE; + dev->n_rx_urbs = RX_SS_URB_NUM; + dev->n_tx_urbs = TX_SS_URB_NUM; + dev->bulk_in_delay = SS_BULK_IN_DELAY; + dev->burst_cap = SS_BURST_CAP_SIZE / SS_USB_PKT_SIZE; + break; + case USB_SPEED_HIGH: + dev->rx_urb_size = RX_HS_URB_SIZE; + dev->tx_urb_size = TX_HS_URB_SIZE; + dev->n_rx_urbs = RX_HS_URB_NUM; + dev->n_tx_urbs = TX_HS_URB_NUM; + dev->bulk_in_delay = HS_BULK_IN_DELAY; + dev->burst_cap = HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE; + break; + case USB_SPEED_FULL: + dev->rx_urb_size = RX_FS_URB_SIZE; + dev->tx_urb_size = TX_FS_URB_SIZE; + dev->n_rx_urbs = RX_FS_URB_NUM; + dev->n_tx_urbs = TX_FS_URB_NUM; + dev->bulk_in_delay = FS_BULK_IN_DELAY; + dev->burst_cap = FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE; + break; + default: + netdev_warn(dev->net, "USB bus speed not supported\n"); + result = -EIO; + break; + } + + return result; +} + +static int lan78xx_start_hw(struct lan78xx_net *dev, u32 reg, u32 hw_enable) +{ + return lan78xx_update_reg(dev, reg, hw_enable, hw_enable); +} + +static int lan78xx_stop_hw(struct lan78xx_net *dev, u32 reg, u32 hw_enabled, + u32 hw_disabled) +{ + unsigned long timeout; + bool stopped = true; + int ret; + u32 buf; + + /* Stop the h/w block (if not already stopped) */ + + ret = lan78xx_read_reg(dev, reg, &buf); + if (ret < 0) + return ret; + + if (buf & hw_enabled) { + buf &= ~hw_enabled; + + ret = lan78xx_write_reg(dev, reg, buf); + if (ret < 0) + return ret; + + stopped = false; + timeout = jiffies + HW_DISABLE_TIMEOUT; + do { + ret = lan78xx_read_reg(dev, reg, &buf); + if (ret < 0) + return ret; + + if (buf & hw_disabled) + stopped = true; + else + msleep(HW_DISABLE_DELAY_MS); + } while (!stopped && !time_after(jiffies, timeout)); + } + + ret = stopped ? 0 : -ETIME; + + return ret; +} + +static int lan78xx_flush_fifo(struct lan78xx_net *dev, u32 reg, u32 fifo_flush) +{ + return lan78xx_update_reg(dev, reg, fifo_flush, fifo_flush); +} + +static int lan78xx_start_tx_path(struct lan78xx_net *dev) +{ + int ret; + + netif_dbg(dev, drv, dev->net, "start tx path"); + + /* Start the MAC transmitter */ + + ret = lan78xx_start_hw(dev, MAC_TX, MAC_TX_TXEN_); + if (ret < 0) + return ret; + + /* Start the Tx FIFO */ + + ret = lan78xx_start_hw(dev, FCT_TX_CTL, FCT_TX_CTL_EN_); + if (ret < 0) + return ret; + + return 0; +} + +static int lan78xx_stop_tx_path(struct lan78xx_net *dev) +{ + int ret; + + netif_dbg(dev, drv, dev->net, "stop tx path"); + + /* Stop the Tx FIFO */ + + ret = lan78xx_stop_hw(dev, FCT_TX_CTL, FCT_TX_CTL_EN_, FCT_TX_CTL_DIS_); + if (ret < 0) + return ret; + + /* Stop the MAC transmitter */ + + ret = lan78xx_stop_hw(dev, MAC_TX, MAC_TX_TXEN_, MAC_TX_TXD_); + if (ret < 0) + return ret; + + return 0; +} + +/* The caller must ensure the Tx path is stopped before calling + * lan78xx_flush_tx_fifo(). + */ +static int lan78xx_flush_tx_fifo(struct lan78xx_net *dev) +{ + return lan78xx_flush_fifo(dev, FCT_TX_CTL, FCT_TX_CTL_RST_); +} + +static int lan78xx_start_rx_path(struct lan78xx_net *dev) +{ + int ret; + + netif_dbg(dev, drv, dev->net, "start rx path"); + + /* Start the Rx FIFO */ + + ret = lan78xx_start_hw(dev, FCT_RX_CTL, FCT_RX_CTL_EN_); + if (ret < 0) + return ret; + + /* Start the MAC receiver*/ + + ret = lan78xx_start_hw(dev, MAC_RX, MAC_RX_RXEN_); + if (ret < 0) + return ret; + + return 0; +} + +static int lan78xx_stop_rx_path(struct lan78xx_net *dev) +{ + int ret; + + netif_dbg(dev, drv, dev->net, "stop rx path"); + + /* Stop the MAC receiver */ + + ret = lan78xx_stop_hw(dev, MAC_RX, MAC_RX_RXEN_, MAC_RX_RXD_); + if (ret < 0) + return ret; + + /* Stop the Rx FIFO */ + + ret = lan78xx_stop_hw(dev, FCT_RX_CTL, FCT_RX_CTL_EN_, FCT_RX_CTL_DIS_); + if (ret < 0) + return ret; + + return 0; +} + +/* The caller must ensure the Rx path is stopped before calling + * lan78xx_flush_rx_fifo(). + */ +static int lan78xx_flush_rx_fifo(struct lan78xx_net *dev) +{ + return lan78xx_flush_fifo(dev, FCT_RX_CTL, FCT_RX_CTL_RST_); +} + +static int lan78xx_reset(struct lan78xx_net *dev) +{ + struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); + unsigned long timeout; + int ret; + u32 buf; + u8 sig; + + ret = lan78xx_read_reg(dev, HW_CFG, &buf); + if (ret < 0) + return ret; + + buf |= HW_CFG_LRST_; + + ret = lan78xx_write_reg(dev, HW_CFG, buf); + if (ret < 0) + return ret; + + timeout = jiffies + HZ; + do { + mdelay(1); + ret = lan78xx_read_reg(dev, HW_CFG, &buf); + if (ret < 0) + return ret; + + if (time_after(jiffies, timeout)) { + netdev_warn(dev->net, + "timeout on completion of LiteReset"); + ret = -ETIMEDOUT; + return ret; + } + } while (buf & HW_CFG_LRST_); + + lan78xx_init_mac_address(dev); + + /* save DEVID for later usage */ + ret = lan78xx_read_reg(dev, ID_REV, &buf); + if (ret < 0) + return ret; + + dev->chipid = (buf & ID_REV_CHIP_ID_MASK_) >> 16; + dev->chiprev = buf & ID_REV_CHIP_REV_MASK_; + + /* Respond to the IN token with a NAK */ + ret = lan78xx_read_reg(dev, USB_CFG0, &buf); + if (ret < 0) + return ret; + + buf |= USB_CFG_BIR_; + + ret = lan78xx_write_reg(dev, USB_CFG0, buf); + if (ret < 0) + return ret; + + /* Init LTM */ + lan78xx_init_ltm(dev); + + ret = lan78xx_write_reg(dev, BURST_CAP, dev->burst_cap); + if (ret < 0) + return ret; + + ret = lan78xx_write_reg(dev, BULK_IN_DLY, dev->bulk_in_delay); + if (ret < 0) + return ret; + + ret = lan78xx_read_reg(dev, HW_CFG, &buf); + if (ret < 0) + return ret; + + buf |= HW_CFG_MEF_; + + ret = lan78xx_write_reg(dev, HW_CFG, buf); + if (ret < 0) + return ret; + + ret = lan78xx_read_reg(dev, USB_CFG0, &buf); + if (ret < 0) + return ret; + + buf |= USB_CFG_BCE_; + + ret = lan78xx_write_reg(dev, USB_CFG0, buf); + if (ret < 0) + return ret; + + /* set FIFO sizes */ + buf = (MAX_RX_FIFO_SIZE - 512) / 512; + + ret = lan78xx_write_reg(dev, FCT_RX_FIFO_END, buf); + if (ret < 0) + return ret; + + buf = (MAX_TX_FIFO_SIZE - 512) / 512; + + ret = lan78xx_write_reg(dev, FCT_TX_FIFO_END, buf); + if (ret < 0) + return ret; + + ret = lan78xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); + if (ret < 0) + return ret; + + ret = lan78xx_write_reg(dev, FLOW, 0); + if (ret < 0) + return ret; + + ret = lan78xx_write_reg(dev, FCT_FLOW, 0); + if (ret < 0) + return ret; + + /* Don't need rfe_ctl_lock during initialisation */ + ret = lan78xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl); + if (ret < 0) + return ret; + + pdata->rfe_ctl |= RFE_CTL_BCAST_EN_ | RFE_CTL_DA_PERFECT_; + + ret = lan78xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); + if (ret < 0) + return ret; + + /* Enable or disable checksum offload engines */ + ret = lan78xx_set_features(dev->net, dev->net->features); + if (ret < 0) + return ret; + + lan78xx_set_multicast(dev->net); + + /* reset PHY */ + ret = lan78xx_read_reg(dev, PMT_CTL, &buf); + if (ret < 0) + return ret; + + buf |= PMT_CTL_PHY_RST_; + + ret = lan78xx_write_reg(dev, PMT_CTL, buf); + if (ret < 0) + return ret; + + timeout = jiffies + HZ; + do { + mdelay(1); + ret = lan78xx_read_reg(dev, PMT_CTL, &buf); + if (ret < 0) + return ret; + + if (time_after(jiffies, timeout)) { + netdev_warn(dev->net, "timeout waiting for PHY Reset"); + ret = -ETIMEDOUT; + return ret; + } + } while ((buf & PMT_CTL_PHY_RST_) || !(buf & PMT_CTL_READY_)); + + ret = lan78xx_read_reg(dev, MAC_CR, &buf); + if (ret < 0) + return ret; + + /* LAN7801 only has RGMII mode */ + if (dev->chipid == ID_REV_CHIP_ID_7801_) + buf &= ~MAC_CR_GMII_EN_; + + if (dev->chipid == ID_REV_CHIP_ID_7800_) { + ret = lan78xx_read_raw_eeprom(dev, 0, 1, &sig); + if (!ret && sig != EEPROM_INDICATOR) { + /* Implies there is no external eeprom. Set mac speed */ + netdev_info(dev->net, "No External EEPROM. Setting MAC Speed\n"); + buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_; + } + } + ret = lan78xx_write_reg(dev, MAC_CR, buf); + if (ret < 0) + return ret; + + ret = lan78xx_set_rx_max_frame_length(dev, + RX_MAX_FRAME_LEN(dev->net->mtu)); + + return ret; +} + +static void lan78xx_init_stats(struct lan78xx_net *dev) +{ + u32 *p; + int i; + + /* initialize for stats update + * some counters are 20bits and some are 32bits + */ + p = (u32 *)&dev->stats.rollover_max; + for (i = 0; i < (sizeof(dev->stats.rollover_max) / (sizeof(u32))); i++) + p[i] = 0xFFFFF; + + dev->stats.rollover_max.rx_unicast_byte_count = 0xFFFFFFFF; + dev->stats.rollover_max.rx_broadcast_byte_count = 0xFFFFFFFF; + dev->stats.rollover_max.rx_multicast_byte_count = 0xFFFFFFFF; + dev->stats.rollover_max.eee_rx_lpi_transitions = 0xFFFFFFFF; + dev->stats.rollover_max.eee_rx_lpi_time = 0xFFFFFFFF; + dev->stats.rollover_max.tx_unicast_byte_count = 0xFFFFFFFF; + dev->stats.rollover_max.tx_broadcast_byte_count = 0xFFFFFFFF; + dev->stats.rollover_max.tx_multicast_byte_count = 0xFFFFFFFF; + dev->stats.rollover_max.eee_tx_lpi_transitions = 0xFFFFFFFF; + dev->stats.rollover_max.eee_tx_lpi_time = 0xFFFFFFFF; + + set_bit(EVENT_STAT_UPDATE, &dev->flags); +} + +static int lan78xx_open(struct net_device *net) +{ + struct lan78xx_net *dev = netdev_priv(net); + int ret; + + netif_dbg(dev, ifup, dev->net, "open device"); + + ret = usb_autopm_get_interface(dev->intf); + if (ret < 0) + return ret; + + mutex_lock(&dev->dev_mutex); + + phy_start(net->phydev); + + netif_dbg(dev, ifup, dev->net, "phy initialised successfully"); + + /* 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; + } + } + + ret = lan78xx_flush_rx_fifo(dev); + if (ret < 0) + goto done; + ret = lan78xx_flush_tx_fifo(dev); + if (ret < 0) + goto done; + + ret = lan78xx_start_tx_path(dev); + if (ret < 0) + goto done; + ret = lan78xx_start_rx_path(dev); + if (ret < 0) + goto done; + + lan78xx_init_stats(dev); + + set_bit(EVENT_DEV_OPEN, &dev->flags); + + netif_start_queue(net); + + dev->link_on = false; + + napi_enable(&dev->napi); + + lan78xx_defer_kevent(dev, EVENT_LINK_RESET); +done: + mutex_unlock(&dev->dev_mutex); + + usb_autopm_put_interface(dev->intf); + + 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)) { + schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); + set_current_state(TASK_UNINTERRUPTIBLE); + netif_dbg(dev, ifdown, dev->net, + "waited for %d urb completions", temp); + } + set_current_state(TASK_RUNNING); + dev->wait = NULL; + remove_wait_queue(&unlink_wakeup, &wait); + + /* empty Rx done, Rx overflow and Tx pend queues + */ + while (!skb_queue_empty(&dev->rxq_done)) { + struct sk_buff *skb = skb_dequeue(&dev->rxq_done); + + lan78xx_release_rx_buf(dev, skb); + } + + skb_queue_purge(&dev->rxq_overflow); + skb_queue_purge(&dev->txq_pend); +} + +static int lan78xx_stop(struct net_device *net) +{ + struct lan78xx_net *dev = netdev_priv(net); + + netif_dbg(dev, ifup, dev->net, "stop device"); + + mutex_lock(&dev->dev_mutex); + + if (timer_pending(&dev->stat_monitor)) + del_timer_sync(&dev->stat_monitor); + + clear_bit(EVENT_DEV_OPEN, &dev->flags); + netif_stop_queue(net); + napi_disable(&dev->napi); + + lan78xx_terminate_urbs(dev); + + 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); + + /* ignore errors that occur stopping the Tx and Rx data paths */ + lan78xx_stop_tx_path(dev); + lan78xx_stop_rx_path(dev); + + if (net->phydev) + phy_stop(net->phydev); + + usb_kill_urb(dev->urb_intr); + + /* 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. + */ + clear_bit(EVENT_TX_HALT, &dev->flags); + clear_bit(EVENT_RX_HALT, &dev->flags); + clear_bit(EVENT_LINK_RESET, &dev->flags); + clear_bit(EVENT_STAT_UPDATE, &dev->flags); + + cancel_delayed_work_sync(&dev->wq); + + usb_autopm_put_interface(dev->intf); + + mutex_unlock(&dev->dev_mutex); + + return 0; +} + +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->rxq_done.lock); + + __skb_queue_tail(&dev->rxq_done, skb); + if (skb_queue_len(&dev->rxq_done) == 1) + napi_schedule(&dev->napi); + + spin_unlock_irqrestore(&dev->rxq_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 += entry->num_of_packet; + dev->net->stats.tx_bytes += entry->length; + } else { + dev->net->stats.tx_errors += entry->num_of_packet; + + switch (urb->status) { + case -EPIPE: + lan78xx_defer_kevent(dev, EVENT_TX_HALT); + break; + + /* software-driven interface shutdown */ + case -ECONNRESET: + case -ESHUTDOWN: + netif_dbg(dev, tx_err, dev->net, + "tx err interface gone %d\n", + entry->urb->status); + break; + + case -EPROTO: + case -ETIME: + case -EILSEQ: + netif_stop_queue(dev->net); + netif_dbg(dev, tx_err, dev->net, + "tx err queue stopped %d\n", + entry->urb->status); + break; + default: + netif_dbg(dev, tx_err, dev->net, + "unknown tx err %d\n", + entry->urb->status); + break; + } + } + + usb_autopm_put_interface_async(dev->intf); + + skb_unlink(skb, &dev->txq); + + lan78xx_release_tx_buf(dev, skb); + + /* Re-schedule NAPI if Tx data pending but no URBs in progress. + */ + if (skb_queue_empty(&dev->txq) && + !skb_queue_empty(&dev->txq_pend)) + napi_schedule(&dev->napi); +} + +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; +} + +static unsigned int lan78xx_tx_urb_space(struct lan78xx_net *dev) +{ + return skb_queue_len(&dev->txq_free) * dev->tx_urb_size; +} + +static unsigned int lan78xx_tx_pend_data_len(struct lan78xx_net *dev) +{ + return dev->tx_pend_data_len; +} + +static void lan78xx_tx_pend_skb_add(struct lan78xx_net *dev, + struct sk_buff *skb, + unsigned int *tx_pend_data_len) +{ + unsigned long flags; + + spin_lock_irqsave(&dev->txq_pend.lock, flags); + + __skb_queue_tail(&dev->txq_pend, skb); + + dev->tx_pend_data_len += skb->len; + *tx_pend_data_len = dev->tx_pend_data_len; + + spin_unlock_irqrestore(&dev->txq_pend.lock, flags); +} + +static void lan78xx_tx_pend_skb_head_add(struct lan78xx_net *dev, + struct sk_buff *skb, + unsigned int *tx_pend_data_len) +{ + unsigned long flags; + + spin_lock_irqsave(&dev->txq_pend.lock, flags); + + __skb_queue_head(&dev->txq_pend, skb); + + dev->tx_pend_data_len += skb->len; + *tx_pend_data_len = dev->tx_pend_data_len; + + spin_unlock_irqrestore(&dev->txq_pend.lock, flags); +} + +static void lan78xx_tx_pend_skb_get(struct lan78xx_net *dev, + struct sk_buff **skb, + unsigned int *tx_pend_data_len) +{ + unsigned long flags; + + spin_lock_irqsave(&dev->txq_pend.lock, flags); + + *skb = __skb_dequeue(&dev->txq_pend); + if (*skb) + dev->tx_pend_data_len -= (*skb)->len; + *tx_pend_data_len = dev->tx_pend_data_len; + + spin_unlock_irqrestore(&dev->txq_pend.lock, flags); +} + +static netdev_tx_t +lan78xx_start_xmit(struct sk_buff *skb, struct net_device *net) +{ + struct lan78xx_net *dev = netdev_priv(net); + unsigned int tx_pend_data_len; + + if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) + schedule_delayed_work(&dev->wq, 0); + + skb_tx_timestamp(skb); + + lan78xx_tx_pend_skb_add(dev, skb, &tx_pend_data_len); + + /* Set up a Tx URB if none is in progress */ + + if (skb_queue_empty(&dev->txq)) + napi_schedule(&dev->napi); + + /* Stop stack Tx queue if we have enough data to fill + * all the free Tx URBs. + */ + if (tx_pend_data_len > lan78xx_tx_urb_space(dev)) { + netif_stop_queue(net); + + netif_dbg(dev, hw, dev->net, "tx data len: %u, urb space %u", + tx_pend_data_len, lan78xx_tx_urb_space(dev)); + + /* Kick off transmission of pending data */ + + if (!skb_queue_empty(&dev->txq_free)) + napi_schedule(&dev->napi); + } + + return NETDEV_TX_OK; +} + +static int lan78xx_bind(struct lan78xx_net *dev, struct usb_interface *intf) +{ + struct lan78xx_priv *pdata = NULL; + int ret; + int i; + + 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; + + if (DEFAULT_VLAN_RX_OFFLOAD) + dev->net->features |= NETIF_F_HW_VLAN_CTAG_RX; + + if (DEFAULT_VLAN_FILTER_ENABLE) + dev->net->features |= NETIF_F_HW_VLAN_CTAG_FILTER; + + dev->net->hw_features = dev->net->features; + + ret = lan78xx_setup_irq_domain(dev); + if (ret < 0) { + netdev_warn(dev->net, + "lan78xx_setup_irq_domain() failed : %d", ret); + goto out1; + } + + /* Init all registers */ + ret = lan78xx_reset(dev); + if (ret) { + netdev_warn(dev->net, "Registers INIT FAILED...."); + goto out2; + } + + ret = lan78xx_mdio_init(dev); + if (ret) { + netdev_warn(dev->net, "MDIO INIT FAILED....."); + goto out2; + } + + dev->net->flags |= IFF_MULTICAST; + + pdata->wol = WAKE_MAGIC; + + return ret; + +out2: + lan78xx_remove_irq_domain(dev); + +out1: + netdev_warn(dev->net, "Bind routine FAILED"); + cancel_work_sync(&pdata->set_multicast); + cancel_work_sync(&pdata->set_vlan); + kfree(pdata); + return ret; +} + +static void lan78xx_unbind(struct lan78xx_net *dev, struct usb_interface *intf) +{ + struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); + + lan78xx_remove_irq_domain(dev); + + lan78xx_remove_mdio(dev); + + if (pdata) { + cancel_work_sync(&pdata->set_multicast); + cancel_work_sync(&pdata->set_vlan); + 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) +{ + /* HW Checksum offload appears to be flawed if used when not stripping + * VLAN headers. Drop back to S/W checksums under these conditions. + */ + if (!(dev->net->features & NETIF_F_RXCSUM) || + unlikely(rx_cmd_a & RX_CMD_A_ICSM_) || + ((rx_cmd_a & RX_CMD_A_FVTG_) && + !(dev->net->features & NETIF_F_HW_VLAN_CTAG_RX))) { + skb->ip_summed = CHECKSUM_NONE; + } else { + skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT_)); + skb->ip_summed = CHECKSUM_COMPLETE; + } +} + +static void lan78xx_rx_vlan_offload(struct lan78xx_net *dev, + struct sk_buff *skb, + u32 rx_cmd_a, u32 rx_cmd_b) +{ + if ((dev->net->features & NETIF_F_HW_VLAN_CTAG_RX) && + (rx_cmd_a & RX_CMD_A_FVTG_)) + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), + (rx_cmd_b & 0xffff)); +} + +static void lan78xx_skb_return(struct lan78xx_net *dev, struct sk_buff *skb) +{ + dev->net->stats.rx_packets++; + dev->net->stats.rx_bytes += skb->len; + + skb->protocol = eth_type_trans(skb, dev->net); + + 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; + + napi_gro_receive(&dev->napi, skb); +} + +static int lan78xx_rx(struct lan78xx_net *dev, struct sk_buff *skb, + int budget, int *work_done) +{ + if (skb->len < RX_SKB_MIN_LEN) + return 0; + + /* Extract frames from the URB buffer and pass each one to + * the stack in a new NAPI SKB. + */ + while (skb->len > 0) { + u32 rx_cmd_a, rx_cmd_b, align_count, size; + u16 rx_cmd_c; + unsigned char *packet; + + rx_cmd_a = get_unaligned_le32(skb->data); + skb_pull(skb, sizeof(rx_cmd_a)); + + rx_cmd_b = get_unaligned_le32(skb->data); + skb_pull(skb, sizeof(rx_cmd_b)); + + rx_cmd_c = get_unaligned_le16(skb->data); + 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(size > skb->len)) { + netif_dbg(dev, rx_err, dev->net, + "size err rx_cmd_a=0x%08x\n", + rx_cmd_a); + return 0; + } + + 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 { + u32 frame_len; + struct sk_buff *skb2; + + if (unlikely(size < ETH_FCS_LEN)) { + netif_dbg(dev, rx_err, dev->net, + "size err rx_cmd_a=0x%08x\n", + rx_cmd_a); + return 0; + } + + frame_len = size - ETH_FCS_LEN; + + skb2 = napi_alloc_skb(&dev->napi, frame_len); + if (!skb2) + return 0; + + memcpy(skb2->data, packet, frame_len); + + skb_put(skb2, frame_len); + + lan78xx_rx_csum_offload(dev, skb2, rx_cmd_a, rx_cmd_b); + lan78xx_rx_vlan_offload(dev, skb2, rx_cmd_a, rx_cmd_b); + + /* Processing of the URB buffer must complete once + * it has started. If the NAPI work budget is exhausted + * while frames remain they are added to the overflow + * queue for delivery in the next NAPI polling cycle. + */ + if (*work_done < budget) { + lan78xx_skb_return(dev, skb2); + ++(*work_done); + } else { + skb_queue_tail(&dev->rxq_overflow, skb2); + } + } + + skb_pull(skb, size); + + /* skip padding bytes before the next frame starts */ + if (skb->len) + skb_pull(skb, align_count); + } + + return 1; +} + +static inline void rx_process(struct lan78xx_net *dev, struct sk_buff *skb, + int budget, int *work_done) +{ + if (!lan78xx_rx(dev, skb, budget, work_done)) { + netif_dbg(dev, rx_err, dev->net, "drop\n"); + dev->net->stats.rx_errors++; + } +} + +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; + + netif_dbg(dev, rx_status, dev->net, + "rx done: status %d", urb->status); + + skb_put(skb, urb->actual_length); + state = rx_done; + + if (urb != entry->urb) + netif_warn(dev, rx_err, dev->net, "URB pointer mismatch"); + + switch (urb_status) { + case 0: + if (skb->len < RX_SKB_MIN_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; + break; + case -EPROTO: + case -ETIME: + case -EILSEQ: + dev->net->stats.rx_errors++; + state = rx_cleanup; + 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); +} + +static int rx_submit(struct lan78xx_net *dev, struct sk_buff *skb, gfp_t flags) +{ + struct skb_data *entry = (struct skb_data *)skb->cb; + size_t size = dev->rx_urb_size; + struct urb *urb = entry->urb; + unsigned long lockflags; + int ret = 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, flags); + 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: + case -ENOENT: + netif_dbg(dev, ifdown, dev->net, "device gone\n"); + netif_device_detach(dev->net); + break; + case -EHOSTUNREACH: + ret = -ENOLINK; + napi_schedule(&dev->napi); + break; + default: + netif_dbg(dev, rx_err, dev->net, + "rx submit, %d\n", ret); + napi_schedule(&dev->napi); + break; + } + } else { + netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); + ret = -ENOLINK; + } + spin_unlock_irqrestore(&dev->rxq.lock, lockflags); + + if (ret) + lan78xx_release_rx_buf(dev, skb); + + return ret; +} + +static void lan78xx_rx_urb_submit_all(struct lan78xx_net *dev) +{ + struct sk_buff *rx_buf; + + /* Ensure the maximum number of Rx URBs is submitted + */ + while ((rx_buf = lan78xx_get_rx_buf(dev)) != NULL) { + if (rx_submit(dev, rx_buf, GFP_ATOMIC) != 0) + break; + } +} + +static void lan78xx_rx_urb_resubmit(struct lan78xx_net *dev, + struct sk_buff *rx_buf) +{ + /* reset SKB data pointers */ + + rx_buf->data = rx_buf->head; + skb_reset_tail_pointer(rx_buf); + rx_buf->len = 0; + rx_buf->data_len = 0; + + rx_submit(dev, rx_buf, GFP_ATOMIC); +} + +static void lan78xx_fill_tx_cmd_words(struct sk_buff *skb, u8 *buffer) +{ + u32 tx_cmd_a; + u32 tx_cmd_b; + + 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_; + } + + put_unaligned_le32(tx_cmd_a, buffer); + put_unaligned_le32(tx_cmd_b, buffer + 4); +} + +static struct skb_data *lan78xx_tx_buf_fill(struct lan78xx_net *dev, + struct sk_buff *tx_buf) +{ + struct skb_data *entry = (struct skb_data *)tx_buf->cb; + int remain = dev->tx_urb_size; + u8 *tx_data = tx_buf->data; + u32 urb_len = 0; + + entry->num_of_packet = 0; + entry->length = 0; + + /* Work through the pending SKBs and copy the data of each SKB into + * the URB buffer if there room for all the SKB data. + * + * There must be at least DST+SRC+TYPE in the SKB (with padding enabled) + */ + while (remain >= TX_SKB_MIN_LEN) { + unsigned int pending_bytes; + unsigned int align_bytes; + struct sk_buff *skb; + unsigned int len; + + lan78xx_tx_pend_skb_get(dev, &skb, &pending_bytes); + + if (!skb) + break; + + align_bytes = (TX_ALIGNMENT - (urb_len % TX_ALIGNMENT)) % + TX_ALIGNMENT; + len = align_bytes + TX_CMD_LEN + skb->len; + if (len > remain) { + lan78xx_tx_pend_skb_head_add(dev, skb, &pending_bytes); + break; + } + + tx_data += align_bytes; + + lan78xx_fill_tx_cmd_words(skb, tx_data); + tx_data += TX_CMD_LEN; + + len = skb->len; + if (skb_copy_bits(skb, 0, tx_data, len) < 0) { + struct net_device_stats *stats = &dev->net->stats; + + stats->tx_dropped++; + dev_kfree_skb_any(skb); + tx_data -= TX_CMD_LEN; + continue; + } + + tx_data += len; + entry->length += len; + entry->num_of_packet += skb_shinfo(skb)->gso_segs ?: 1; + + dev_kfree_skb_any(skb); + + urb_len = (u32)(tx_data - (u8 *)tx_buf->data); + + remain = dev->tx_urb_size - urb_len; + } + + skb_put(tx_buf, urb_len); + + return entry; +} + +static void lan78xx_tx_bh(struct lan78xx_net *dev) +{ + int ret; + + /* Start the stack Tx queue if it was stopped + */ + netif_tx_lock(dev->net); + if (netif_queue_stopped(dev->net)) { + if (lan78xx_tx_pend_data_len(dev) < lan78xx_tx_urb_space(dev)) + netif_wake_queue(dev->net); + } + netif_tx_unlock(dev->net); + + /* Go through the Tx pending queue and set up URBs to transfer + * the data to the device. Stop if no more pending data or URBs, + * or if an error occurs when a URB is submitted. + */ + do { + struct skb_data *entry; + struct sk_buff *tx_buf; + unsigned long flags; + + if (skb_queue_empty(&dev->txq_pend)) + break; + + tx_buf = lan78xx_get_tx_buf(dev); + if (!tx_buf) + break; + + entry = lan78xx_tx_buf_fill(dev, tx_buf); + + 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 out; + } + + usb_fill_bulk_urb(entry->urb, dev->udev, dev->pipe_out, + tx_buf->data, tx_buf->len, tx_complete, + tx_buf); + + if (tx_buf->len % dev->maxpacket == 0) { + /* send USB_ZERO_PACKET */ + entry->urb->transfer_flags |= URB_ZERO_PACKET; + } + +#ifdef CONFIG_PM + /* if device is asleep stop outgoing packet processing */ + if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { + usb_anchor_urb(entry->urb, &dev->deferred); + netif_stop_queue(dev->net); + spin_unlock_irqrestore(&dev->txq.lock, flags); + netdev_dbg(dev->net, + "Delaying transmission for resumption\n"); + return; + } +#endif + ret = usb_submit_urb(entry->urb, GFP_ATOMIC); + switch (ret) { + case 0: + netif_trans_update(dev->net); + lan78xx_queue_skb(&dev->txq, tx_buf, tx_start); + break; + case -EPIPE: + netif_stop_queue(dev->net); + lan78xx_defer_kevent(dev, EVENT_TX_HALT); + usb_autopm_put_interface_async(dev->intf); + break; + case -ENODEV: + case -ENOENT: + netif_dbg(dev, tx_err, dev->net, + "tx submit urb err %d (disconnected?)", ret); + netif_device_detach(dev->net); + 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) { + netdev_warn(dev->net, "failed to tx urb %d\n", ret); +out: + dev->net->stats.tx_dropped += entry->num_of_packet; + lan78xx_release_tx_buf(dev, tx_buf); + } + } while (ret == 0); +} + +static int lan78xx_bh(struct lan78xx_net *dev, int budget) +{ + struct sk_buff_head done; + struct sk_buff *rx_buf; + struct skb_data *entry; + unsigned long flags; + int work_done = 0; + + /* Pass frames received in the last NAPI cycle before + * working on newly completed URBs. + */ + while (!skb_queue_empty(&dev->rxq_overflow)) { + lan78xx_skb_return(dev, skb_dequeue(&dev->rxq_overflow)); + ++work_done; + } + + /* Take a snapshot of the done queue and move items to a + * temporary queue. Rx URB completions will continue to add + * to the done queue. + */ + __skb_queue_head_init(&done); + + spin_lock_irqsave(&dev->rxq_done.lock, flags); + skb_queue_splice_init(&dev->rxq_done, &done); + spin_unlock_irqrestore(&dev->rxq_done.lock, flags); + + /* Extract receive frames from completed URBs and + * pass them to the stack. Re-submit each completed URB. + */ + while ((work_done < budget) && + (rx_buf = __skb_dequeue(&done))) { + entry = (struct skb_data *)(rx_buf->cb); + switch (entry->state) { + case rx_done: + rx_process(dev, rx_buf, budget, &work_done); + break; + case rx_cleanup: + break; + default: + netdev_dbg(dev->net, "rx buf state %d\n", + entry->state); + break; + } + + lan78xx_rx_urb_resubmit(dev, rx_buf); + } + + /* If budget was consumed before processing all the URBs put them + * back on the front of the done queue. They will be first to be + * processed in the next NAPI cycle. + */ + spin_lock_irqsave(&dev->rxq_done.lock, flags); + skb_queue_splice(&done, &dev->rxq_done); + spin_unlock_irqrestore(&dev->rxq_done.lock, flags); + + if (netif_device_present(dev->net) && netif_running(dev->net)) { + /* reset update timer delta */ + if (timer_pending(&dev->stat_monitor) && (dev->delta != 1)) { + dev->delta = 1; + mod_timer(&dev->stat_monitor, + jiffies + STAT_UPDATE_TIMER); + } + + /* Submit all free Rx URBs */ + + if (!test_bit(EVENT_RX_HALT, &dev->flags)) + lan78xx_rx_urb_submit_all(dev); + + /* Submit new Tx URBs */ + + lan78xx_tx_bh(dev); + } + + return work_done; +} + +static int lan78xx_poll(struct napi_struct *napi, int budget) +{ + struct lan78xx_net *dev = container_of(napi, struct lan78xx_net, napi); + int result = budget; + int work_done; + + /* Don't do any work if the device is suspended */ + + if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { + napi_complete_done(napi, 0); + return 0; + } + + /* Process completed URBs and submit new URBs */ + + work_done = lan78xx_bh(dev, budget); + + if (work_done < budget) { + napi_complete_done(napi, work_done); + + /* Start a new polling cycle if data was received or + * data is waiting to be transmitted. + */ + if (!skb_queue_empty(&dev->rxq_done)) { + napi_schedule(napi); + } else if (netif_carrier_ok(dev->net)) { + if (skb_queue_empty(&dev->txq) && + !skb_queue_empty(&dev->txq_pend)) { + napi_schedule(napi); + } else { + netif_tx_lock(dev->net); + if (netif_queue_stopped(dev->net)) { + netif_wake_queue(dev->net); + napi_schedule(napi); + } + netif_tx_unlock(dev->net); + } + } + result = work_done; + } + + return result; +} + +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_DEV_DISCONNECT, &dev->flags)) + return; + + if (usb_autopm_get_interface(dev->intf) < 0) + return; + + if (test_bit(EVENT_TX_HALT, &dev->flags)) { + unlink_urbs(dev, &dev->txq); + + status = usb_clear_halt(dev->udev, dev->pipe_out); + if (status < 0 && + status != -EPIPE && + status != -ESHUTDOWN) { + if (netif_msg_tx_err(dev)) + 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_clear_halt(dev->udev, dev->pipe_in); + if (status < 0 && + status != -EPIPE && + status != -ESHUTDOWN) { + if (netif_msg_rx_err(dev)) + netdev_err(dev->net, + "can't clear rx halt, status %d\n", + status); + } else { + clear_bit(EVENT_RX_HALT, &dev->flags); + napi_schedule(&dev->napi); + } + } + + if (test_bit(EVENT_LINK_RESET, &dev->flags)) { + int ret = 0; + + clear_bit(EVENT_LINK_RESET, &dev->flags); + if (lan78xx_link_reset(dev) < 0) { + netdev_info(dev->net, "link reset failed (%d)\n", + ret); + } + } + + if (test_bit(EVENT_STAT_UPDATE, &dev->flags)) { + lan78xx_update_stats(dev); + + clear_bit(EVENT_STAT_UPDATE, &dev->flags); + + mod_timer(&dev->stat_monitor, + jiffies + (STAT_UPDATE_TIMER * dev->delta)); + + dev->delta = min((dev->delta * 2), 50); + } + + 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 -ENODEV: /* hardware gone */ + 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_device_present(dev->net) || + !netif_running(dev->net)) { + netdev_warn(dev->net, "not submitting new status URB"); + return; + } + + memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); + status = usb_submit_urb(urb, GFP_ATOMIC); + + switch (status) { + case 0: + break; + case -ENODEV: + case -ENOENT: + netif_dbg(dev, timer, dev->net, + "intr resubmit %d (disconnect?)", status); + netif_device_detach(dev->net); + break; + default: + netif_err(dev, timer, dev->net, + "intr resubmit --> %d\n", status); + break; + } +} + +static void lan78xx_disconnect(struct usb_interface *intf) +{ + struct lan78xx_net *dev; + struct usb_device *udev; + struct net_device *net; + struct phy_device *phydev; + + dev = usb_get_intfdata(intf); + usb_set_intfdata(intf, NULL); + if (!dev) + return; + + set_bit(EVENT_DEV_DISCONNECT, &dev->flags); + + netif_napi_del(&dev->napi); + + udev = interface_to_usbdev(intf); + net = dev->net; + + unregister_netdev(net); + + cancel_delayed_work_sync(&dev->wq); + + phydev = net->phydev; + + phy_unregister_fixup_for_uid(PHY_KSZ9031RNX, 0xfffffff0); + phy_unregister_fixup_for_uid(PHY_LAN8835, 0xfffffff0); + + phy_disconnect(net->phydev); + + if (phy_is_pseudo_fixed_link(phydev)) + fixed_phy_unregister(phydev); + + usb_scuttle_anchored_urbs(&dev->deferred); + + if (timer_pending(&dev->stat_monitor)) + del_timer_sync(&dev->stat_monitor); + + lan78xx_unbind(dev, intf); + + lan78xx_free_tx_resources(dev); + lan78xx_free_rx_resources(dev); + + usb_kill_urb(dev->urb_intr); + usb_free_urb(dev->urb_intr); + + free_netdev(net); + usb_put_dev(udev); +} + +static void lan78xx_tx_timeout(struct net_device *net, unsigned int txqueue) +{ + struct lan78xx_net *dev = netdev_priv(net); + + unlink_urbs(dev, &dev->txq); + napi_schedule(&dev->napi); +} + +static netdev_features_t lan78xx_features_check(struct sk_buff *skb, + struct net_device *netdev, + netdev_features_t features) +{ + struct lan78xx_net *dev = netdev_priv(netdev); + + if (skb->len > LAN78XX_TSO_SIZE(dev)) + features &= ~NETIF_F_GSO_MASK; + + features = vlan_features_check(skb, features); + features = vxlan_features_check(skb, features); + + return features; +} + +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_eth_ioctl = phy_do_ioctl_running, + .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, + .ndo_features_check = lan78xx_features_check, +}; + +static void lan78xx_stat_monitor(struct timer_list *t) +{ + struct lan78xx_net *dev = from_timer(dev, t, stat_monitor); + + lan78xx_defer_kevent(dev, EVENT_STAT_UPDATE); +} + +static int lan78xx_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct usb_host_endpoint *ep_blkin, *ep_blkout, *ep_intr; + struct lan78xx_net *dev; + struct net_device *netdev; + struct usb_device *udev; + int ret; + unsigned int maxp; + unsigned int period; + u8 *buf = NULL; + + udev = interface_to_usbdev(intf); + udev = usb_get_dev(udev); + + netdev = alloc_etherdev(sizeof(struct lan78xx_net)); + if (!netdev) { + dev_err(&intf->dev, "Error: OOM\n"); + ret = -ENOMEM; + 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->rxq_done); + skb_queue_head_init(&dev->txq_pend); + skb_queue_head_init(&dev->rxq_overflow); + mutex_init(&dev->phy_mutex); + mutex_init(&dev->dev_mutex); + + ret = lan78xx_urb_config_init(dev); + if (ret < 0) + goto out2; + + ret = lan78xx_alloc_tx_resources(dev); + if (ret < 0) + goto out2; + + ret = lan78xx_alloc_rx_resources(dev); + if (ret < 0) + goto out3; + + /* MTU range: 68 - 9000 */ + netdev->max_mtu = MAX_SINGLE_PACKET_SIZE; + + netif_set_tso_max_size(netdev, LAN78XX_TSO_SIZE(dev)); + + netif_napi_add(netdev, &dev->napi, lan78xx_poll); + + 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; + + dev->delta = 1; + timer_setup(&dev->stat_monitor, lan78xx_stat_monitor, 0); + + mutex_init(&dev->stats.access_lock); + + if (intf->cur_altsetting->desc.bNumEndpoints < 3) { + ret = -ENODEV; + goto out4; + } + + dev->pipe_in = usb_rcvbulkpipe(udev, BULK_IN_PIPE); + ep_blkin = usb_pipe_endpoint(udev, dev->pipe_in); + if (!ep_blkin || !usb_endpoint_is_bulk_in(&ep_blkin->desc)) { + ret = -ENODEV; + goto out4; + } + + dev->pipe_out = usb_sndbulkpipe(udev, BULK_OUT_PIPE); + ep_blkout = usb_pipe_endpoint(udev, dev->pipe_out); + if (!ep_blkout || !usb_endpoint_is_bulk_out(&ep_blkout->desc)) { + ret = -ENODEV; + goto out4; + } + + ep_intr = &intf->cur_altsetting->endpoint[2]; + if (!usb_endpoint_is_int_in(&ep_intr->desc)) { + ret = -ENODEV; + goto out4; + } + + dev->pipe_intr = usb_rcvintpipe(dev->udev, + usb_endpoint_num(&ep_intr->desc)); + + ret = lan78xx_bind(dev, intf); + if (ret < 0) + goto out4; + + period = ep_intr->desc.bInterval; + maxp = usb_maxpacket(dev->udev, dev->pipe_intr); + buf = kmalloc(maxp, GFP_KERNEL); + if (!buf) { + ret = -ENOMEM; + goto out5; + } + + dev->urb_intr = usb_alloc_urb(0, GFP_KERNEL); + if (!dev->urb_intr) { + ret = -ENOMEM; + goto out6; + } else { + usb_fill_int_urb(dev->urb_intr, dev->udev, + dev->pipe_intr, buf, maxp, + intr_complete, dev, period); + dev->urb_intr->transfer_flags |= URB_FREE_BUFFER; + } + + dev->maxpacket = usb_maxpacket(dev->udev, dev->pipe_out); + + /* Reject broken descriptors. */ + if (dev->maxpacket == 0) { + ret = -ENODEV; + goto out6; + } + + /* driver requires remote-wakeup capability during autosuspend. */ + intf->needs_remote_wakeup = 1; + + ret = lan78xx_phy_init(dev); + if (ret < 0) + goto out7; + + ret = register_netdev(netdev); + if (ret != 0) { + netif_err(dev, probe, netdev, "couldn't register the device\n"); + goto out8; + } + + 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; + +out8: + phy_disconnect(netdev->phydev); +out7: + usb_free_urb(dev->urb_intr); +out6: + kfree(buf); +out5: + lan78xx_unbind(dev, intf); +out4: + netif_napi_del(&dev->napi); + lan78xx_free_rx_resources(dev); +out3: + lan78xx_free_tx_resources(dev); +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_auto_suspend(struct lan78xx_net *dev) +{ + u32 buf; + int ret; + + ret = lan78xx_stop_tx_path(dev); + if (ret < 0) + return ret; + + ret = lan78xx_stop_rx_path(dev); + if (ret < 0) + return ret; + + /* auto suspend (selective suspend) */ + + ret = lan78xx_write_reg(dev, WUCSR, 0); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WUCSR2, 0); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WK_SRC, 0xFFF1FF1FUL); + if (ret < 0) + return ret; + + /* set goodframe wakeup */ + + ret = lan78xx_read_reg(dev, WUCSR, &buf); + if (ret < 0) + return ret; + + buf |= WUCSR_RFE_WAKE_EN_; + buf |= WUCSR_STORE_WAKE_; + + ret = lan78xx_write_reg(dev, WUCSR, buf); + if (ret < 0) + return ret; + + ret = lan78xx_read_reg(dev, PMT_CTL, &buf); + if (ret < 0) + return ret; + + 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); + if (ret < 0) + return ret; + + ret = lan78xx_read_reg(dev, PMT_CTL, &buf); + if (ret < 0) + return ret; + + buf |= PMT_CTL_WUPS_MASK_; + + ret = lan78xx_write_reg(dev, PMT_CTL, buf); + if (ret < 0) + return ret; + + ret = lan78xx_start_rx_path(dev); + + return ret; +} + +static int lan78xx_set_suspend(struct lan78xx_net *dev, u32 wol) +{ + const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E }; + const u8 ipv6_multicast[3] = { 0x33, 0x33 }; + const u8 arp_type[2] = { 0x08, 0x06 }; + u32 temp_pmt_ctl; + int mask_index; + u32 temp_wucsr; + u32 buf; + u16 crc; + int ret; + + ret = lan78xx_stop_tx_path(dev); + if (ret < 0) + return ret; + ret = lan78xx_stop_rx_path(dev); + if (ret < 0) + return ret; + + ret = lan78xx_write_reg(dev, WUCSR, 0); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WUCSR2, 0); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WK_SRC, 0xFFF1FF1FUL); + if (ret < 0) + return ret; + + temp_wucsr = 0; + + temp_pmt_ctl = 0; + + ret = lan78xx_read_reg(dev, PMT_CTL, &temp_pmt_ctl); + if (ret < 0) + return ret; + + 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); + if (ret < 0) + return ret; + } + + 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_)); + if (ret < 0) + return ret; + + ret = lan78xx_write_reg(dev, WUF_MASK0(mask_index), 7); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WUF_MASK1(mask_index), 0); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WUF_MASK2(mask_index), 0); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WUF_MASK3(mask_index), 0); + if (ret < 0) + return ret; + + 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_)); + if (ret < 0) + return ret; + + ret = lan78xx_write_reg(dev, WUF_MASK0(mask_index), 3); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WUF_MASK1(mask_index), 0); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WUF_MASK2(mask_index), 0); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WUF_MASK3(mask_index), 0); + if (ret < 0) + return ret; + + 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_)); + if (ret < 0) + return ret; + + ret = lan78xx_write_reg(dev, WUF_MASK0(mask_index), 0x3000); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WUF_MASK1(mask_index), 0); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WUF_MASK2(mask_index), 0); + if (ret < 0) + return ret; + ret = lan78xx_write_reg(dev, WUF_MASK3(mask_index), 0); + if (ret < 0) + return ret; + + 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); + if (ret < 0) + return ret; + + /* 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); + if (ret < 0) + return ret; + + /* clear WUPS */ + ret = lan78xx_read_reg(dev, PMT_CTL, &buf); + if (ret < 0) + return ret; + + buf |= PMT_CTL_WUPS_MASK_; + + ret = lan78xx_write_reg(dev, PMT_CTL, buf); + if (ret < 0) + return ret; + + ret = lan78xx_start_rx_path(dev); + + return ret; +} + +static int lan78xx_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct lan78xx_net *dev = usb_get_intfdata(intf); + bool dev_open; + int ret; + + mutex_lock(&dev->dev_mutex); + + netif_dbg(dev, ifdown, dev->net, + "suspending: pm event %#x", message.event); + + dev_open = test_bit(EVENT_DEV_OPEN, &dev->flags); + + if (dev_open) { + 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 RX */ + ret = lan78xx_stop_rx_path(dev); + if (ret < 0) + goto out; + + ret = lan78xx_flush_rx_fifo(dev); + if (ret < 0) + goto out; + + /* stop Tx */ + ret = lan78xx_stop_tx_path(dev); + if (ret < 0) + goto out; + + /* empty out the Rx and Tx queues */ + netif_device_detach(dev->net); + lan78xx_terminate_urbs(dev); + usb_kill_urb(dev->urb_intr); + + /* reattach */ + netif_device_attach(dev->net); + + del_timer(&dev->stat_monitor); + + if (PMSG_IS_AUTO(message)) { + ret = lan78xx_set_auto_suspend(dev); + if (ret < 0) + goto out; + } else { + struct lan78xx_priv *pdata; + + pdata = (struct lan78xx_priv *)(dev->data[0]); + netif_carrier_off(dev->net); + ret = lan78xx_set_suspend(dev, pdata->wol); + if (ret < 0) + goto out; + } + } else { + /* Interface is down; don't allow WOL and PHY + * events to wake up the host + */ + u32 buf; + + set_bit(EVENT_DEV_ASLEEP, &dev->flags); + + ret = lan78xx_write_reg(dev, WUCSR, 0); + if (ret < 0) + goto out; + ret = lan78xx_write_reg(dev, WUCSR2, 0); + if (ret < 0) + goto out; + + ret = lan78xx_read_reg(dev, PMT_CTL, &buf); + if (ret < 0) + goto out; + + buf &= ~PMT_CTL_RES_CLR_WKP_EN_; + buf |= PMT_CTL_RES_CLR_WKP_STS_; + buf &= ~PMT_CTL_SUS_MODE_MASK_; + buf |= PMT_CTL_SUS_MODE_3_; + + ret = lan78xx_write_reg(dev, PMT_CTL, buf); + if (ret < 0) + goto out; + + ret = lan78xx_read_reg(dev, PMT_CTL, &buf); + if (ret < 0) + goto out; + + buf |= PMT_CTL_WUPS_MASK_; + + ret = lan78xx_write_reg(dev, PMT_CTL, buf); + if (ret < 0) + goto out; + } + + ret = 0; +out: + mutex_unlock(&dev->dev_mutex); + + return ret; +} + +static bool lan78xx_submit_deferred_urbs(struct lan78xx_net *dev) +{ + bool pipe_halted = false; + struct urb *urb; + + while ((urb = usb_get_from_anchor(&dev->deferred))) { + struct sk_buff *skb = urb->context; + int ret; + + if (!netif_device_present(dev->net) || + !netif_carrier_ok(dev->net) || + pipe_halted) { + lan78xx_release_tx_buf(dev, skb); + continue; + } + + ret = usb_submit_urb(urb, GFP_ATOMIC); + + if (ret == 0) { + netif_trans_update(dev->net); + lan78xx_queue_skb(&dev->txq, skb, tx_start); + } else { + if (ret == -EPIPE) { + netif_stop_queue(dev->net); + pipe_halted = true; + } else if (ret == -ENODEV) { + netif_device_detach(dev->net); + } + + lan78xx_release_tx_buf(dev, skb); + } + } + + return pipe_halted; +} + +static int lan78xx_resume(struct usb_interface *intf) +{ + struct lan78xx_net *dev = usb_get_intfdata(intf); + bool dev_open; + int ret; + + mutex_lock(&dev->dev_mutex); + + netif_dbg(dev, ifup, dev->net, "resuming device"); + + dev_open = test_bit(EVENT_DEV_OPEN, &dev->flags); + + if (dev_open) { + bool pipe_halted = false; + + ret = lan78xx_flush_tx_fifo(dev); + if (ret < 0) + goto out; + + if (dev->urb_intr) { + int ret = usb_submit_urb(dev->urb_intr, GFP_KERNEL); + + if (ret < 0) { + if (ret == -ENODEV) + netif_device_detach(dev->net); + netdev_warn(dev->net, "Failed to submit intr URB"); + } + } + + spin_lock_irq(&dev->txq.lock); + + if (netif_device_present(dev->net)) { + pipe_halted = lan78xx_submit_deferred_urbs(dev); + + if (pipe_halted) + lan78xx_defer_kevent(dev, EVENT_TX_HALT); + } + + clear_bit(EVENT_DEV_ASLEEP, &dev->flags); + + spin_unlock_irq(&dev->txq.lock); + + if (!pipe_halted && + netif_device_present(dev->net) && + (lan78xx_tx_pend_data_len(dev) < lan78xx_tx_urb_space(dev))) + netif_start_queue(dev->net); + + ret = lan78xx_start_tx_path(dev); + if (ret < 0) + goto out; + + napi_schedule(&dev->napi); + + if (!timer_pending(&dev->stat_monitor)) { + dev->delta = 1; + mod_timer(&dev->stat_monitor, + jiffies + STAT_UPDATE_TIMER); + } + + } else { + clear_bit(EVENT_DEV_ASLEEP, &dev->flags); + } + + ret = lan78xx_write_reg(dev, WUCSR2, 0); + if (ret < 0) + goto out; + ret = lan78xx_write_reg(dev, WUCSR, 0); + if (ret < 0) + goto out; + ret = lan78xx_write_reg(dev, WK_SRC, 0xFFF1FF1FUL); + if (ret < 0) + goto out; + + ret = lan78xx_write_reg(dev, WUCSR2, WUCSR2_NS_RCD_ | + WUCSR2_ARP_RCD_ | + WUCSR2_IPV6_TCPSYN_RCD_ | + WUCSR2_IPV4_TCPSYN_RCD_); + if (ret < 0) + goto out; + + 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_); + if (ret < 0) + goto out; + + ret = 0; +out: + mutex_unlock(&dev->dev_mutex); + + return ret; +} + +static int lan78xx_reset_resume(struct usb_interface *intf) +{ + struct lan78xx_net *dev = usb_get_intfdata(intf); + int ret; + + netif_dbg(dev, ifup, dev->net, "(reset) resuming device"); + + ret = lan78xx_reset(dev); + if (ret < 0) + return ret; + + phy_start(dev->net->phydev); + + ret = lan78xx_resume(intf); + + return ret; +} + +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), + }, + { + /* LAN7801 USB Gigabit Ethernet Device */ + USB_DEVICE(LAN78XX_USB_VENDOR_ID, LAN7801_USB_PRODUCT_ID), + }, + { + /* ATM2-AF USB Gigabit Ethernet Device */ + USB_DEVICE(AT29M2AF_USB_VENDOR_ID, AT29M2AF_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"); |