1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2015 Microchip Technology 4 */ 5 #include <linux/version.h> 6 #include <linux/module.h> 7 #include <linux/netdevice.h> 8 #include <linux/etherdevice.h> 9 #include <linux/ethtool.h> 10 #include <linux/usb.h> 11 #include <linux/crc32.h> 12 #include <linux/signal.h> 13 #include <linux/slab.h> 14 #include <linux/if_vlan.h> 15 #include <linux/uaccess.h> 16 #include <linux/linkmode.h> 17 #include <linux/list.h> 18 #include <linux/ip.h> 19 #include <linux/ipv6.h> 20 #include <linux/mdio.h> 21 #include <linux/phy.h> 22 #include <net/ip6_checksum.h> 23 #include <linux/interrupt.h> 24 #include <linux/irqdomain.h> 25 #include <linux/irq.h> 26 #include <linux/irqchip/chained_irq.h> 27 #include <linux/microchipphy.h> 28 #include <linux/phy_fixed.h> 29 #include <linux/of_mdio.h> 30 #include <linux/of_net.h> 31 #include "lan78xx.h" 32 33 #define DRIVER_AUTHOR "WOOJUNG HUH <woojung.huh@microchip.com>" 34 #define DRIVER_DESC "LAN78XX USB 3.0 Gigabit Ethernet Devices" 35 #define DRIVER_NAME "lan78xx" 36 37 #define TX_TIMEOUT_JIFFIES (5 * HZ) 38 #define THROTTLE_JIFFIES (HZ / 8) 39 #define UNLINK_TIMEOUT_MS 3 40 41 #define RX_MAX_QUEUE_MEMORY (60 * 1518) 42 43 #define SS_USB_PKT_SIZE (1024) 44 #define HS_USB_PKT_SIZE (512) 45 #define FS_USB_PKT_SIZE (64) 46 47 #define MAX_RX_FIFO_SIZE (12 * 1024) 48 #define MAX_TX_FIFO_SIZE (12 * 1024) 49 #define DEFAULT_BURST_CAP_SIZE (MAX_TX_FIFO_SIZE) 50 #define DEFAULT_BULK_IN_DELAY (0x0800) 51 #define MAX_SINGLE_PACKET_SIZE (9000) 52 #define DEFAULT_TX_CSUM_ENABLE (true) 53 #define DEFAULT_RX_CSUM_ENABLE (true) 54 #define DEFAULT_TSO_CSUM_ENABLE (true) 55 #define DEFAULT_VLAN_FILTER_ENABLE (true) 56 #define DEFAULT_VLAN_RX_OFFLOAD (true) 57 #define TX_OVERHEAD (8) 58 #define RXW_PADDING 2 59 60 #define LAN78XX_USB_VENDOR_ID (0x0424) 61 #define LAN7800_USB_PRODUCT_ID (0x7800) 62 #define LAN7850_USB_PRODUCT_ID (0x7850) 63 #define LAN7801_USB_PRODUCT_ID (0x7801) 64 #define LAN78XX_EEPROM_MAGIC (0x78A5) 65 #define LAN78XX_OTP_MAGIC (0x78F3) 66 67 #define MII_READ 1 68 #define MII_WRITE 0 69 70 #define EEPROM_INDICATOR (0xA5) 71 #define EEPROM_MAC_OFFSET (0x01) 72 #define MAX_EEPROM_SIZE 512 73 #define OTP_INDICATOR_1 (0xF3) 74 #define OTP_INDICATOR_2 (0xF7) 75 76 #define WAKE_ALL (WAKE_PHY | WAKE_UCAST | \ 77 WAKE_MCAST | WAKE_BCAST | \ 78 WAKE_ARP | WAKE_MAGIC) 79 80 /* USB related defines */ 81 #define BULK_IN_PIPE 1 82 #define BULK_OUT_PIPE 2 83 84 /* default autosuspend delay (mSec)*/ 85 #define DEFAULT_AUTOSUSPEND_DELAY (10 * 1000) 86 87 /* statistic update interval (mSec) */ 88 #define STAT_UPDATE_TIMER (1 * 1000) 89 90 /* defines interrupts from interrupt EP */ 91 #define MAX_INT_EP (32) 92 #define INT_EP_INTEP (31) 93 #define INT_EP_OTP_WR_DONE (28) 94 #define INT_EP_EEE_TX_LPI_START (26) 95 #define INT_EP_EEE_TX_LPI_STOP (25) 96 #define INT_EP_EEE_RX_LPI (24) 97 #define INT_EP_MAC_RESET_TIMEOUT (23) 98 #define INT_EP_RDFO (22) 99 #define INT_EP_TXE (21) 100 #define INT_EP_USB_STATUS (20) 101 #define INT_EP_TX_DIS (19) 102 #define INT_EP_RX_DIS (18) 103 #define INT_EP_PHY (17) 104 #define INT_EP_DP (16) 105 #define INT_EP_MAC_ERR (15) 106 #define INT_EP_TDFU (14) 107 #define INT_EP_TDFO (13) 108 #define INT_EP_UTX (12) 109 #define INT_EP_GPIO_11 (11) 110 #define INT_EP_GPIO_10 (10) 111 #define INT_EP_GPIO_9 (9) 112 #define INT_EP_GPIO_8 (8) 113 #define INT_EP_GPIO_7 (7) 114 #define INT_EP_GPIO_6 (6) 115 #define INT_EP_GPIO_5 (5) 116 #define INT_EP_GPIO_4 (4) 117 #define INT_EP_GPIO_3 (3) 118 #define INT_EP_GPIO_2 (2) 119 #define INT_EP_GPIO_1 (1) 120 #define INT_EP_GPIO_0 (0) 121 122 static const char lan78xx_gstrings[][ETH_GSTRING_LEN] = { 123 "RX FCS Errors", 124 "RX Alignment Errors", 125 "Rx Fragment Errors", 126 "RX Jabber Errors", 127 "RX Undersize Frame Errors", 128 "RX Oversize Frame Errors", 129 "RX Dropped Frames", 130 "RX Unicast Byte Count", 131 "RX Broadcast Byte Count", 132 "RX Multicast Byte Count", 133 "RX Unicast Frames", 134 "RX Broadcast Frames", 135 "RX Multicast Frames", 136 "RX Pause Frames", 137 "RX 64 Byte Frames", 138 "RX 65 - 127 Byte Frames", 139 "RX 128 - 255 Byte Frames", 140 "RX 256 - 511 Bytes Frames", 141 "RX 512 - 1023 Byte Frames", 142 "RX 1024 - 1518 Byte Frames", 143 "RX Greater 1518 Byte Frames", 144 "EEE RX LPI Transitions", 145 "EEE RX LPI Time", 146 "TX FCS Errors", 147 "TX Excess Deferral Errors", 148 "TX Carrier Errors", 149 "TX Bad Byte Count", 150 "TX Single Collisions", 151 "TX Multiple Collisions", 152 "TX Excessive Collision", 153 "TX Late Collisions", 154 "TX Unicast Byte Count", 155 "TX Broadcast Byte Count", 156 "TX Multicast Byte Count", 157 "TX Unicast Frames", 158 "TX Broadcast Frames", 159 "TX Multicast Frames", 160 "TX Pause Frames", 161 "TX 64 Byte Frames", 162 "TX 65 - 127 Byte Frames", 163 "TX 128 - 255 Byte Frames", 164 "TX 256 - 511 Bytes Frames", 165 "TX 512 - 1023 Byte Frames", 166 "TX 1024 - 1518 Byte Frames", 167 "TX Greater 1518 Byte Frames", 168 "EEE TX LPI Transitions", 169 "EEE TX LPI Time", 170 }; 171 172 struct lan78xx_statstage { 173 u32 rx_fcs_errors; 174 u32 rx_alignment_errors; 175 u32 rx_fragment_errors; 176 u32 rx_jabber_errors; 177 u32 rx_undersize_frame_errors; 178 u32 rx_oversize_frame_errors; 179 u32 rx_dropped_frames; 180 u32 rx_unicast_byte_count; 181 u32 rx_broadcast_byte_count; 182 u32 rx_multicast_byte_count; 183 u32 rx_unicast_frames; 184 u32 rx_broadcast_frames; 185 u32 rx_multicast_frames; 186 u32 rx_pause_frames; 187 u32 rx_64_byte_frames; 188 u32 rx_65_127_byte_frames; 189 u32 rx_128_255_byte_frames; 190 u32 rx_256_511_bytes_frames; 191 u32 rx_512_1023_byte_frames; 192 u32 rx_1024_1518_byte_frames; 193 u32 rx_greater_1518_byte_frames; 194 u32 eee_rx_lpi_transitions; 195 u32 eee_rx_lpi_time; 196 u32 tx_fcs_errors; 197 u32 tx_excess_deferral_errors; 198 u32 tx_carrier_errors; 199 u32 tx_bad_byte_count; 200 u32 tx_single_collisions; 201 u32 tx_multiple_collisions; 202 u32 tx_excessive_collision; 203 u32 tx_late_collisions; 204 u32 tx_unicast_byte_count; 205 u32 tx_broadcast_byte_count; 206 u32 tx_multicast_byte_count; 207 u32 tx_unicast_frames; 208 u32 tx_broadcast_frames; 209 u32 tx_multicast_frames; 210 u32 tx_pause_frames; 211 u32 tx_64_byte_frames; 212 u32 tx_65_127_byte_frames; 213 u32 tx_128_255_byte_frames; 214 u32 tx_256_511_bytes_frames; 215 u32 tx_512_1023_byte_frames; 216 u32 tx_1024_1518_byte_frames; 217 u32 tx_greater_1518_byte_frames; 218 u32 eee_tx_lpi_transitions; 219 u32 eee_tx_lpi_time; 220 }; 221 222 struct lan78xx_statstage64 { 223 u64 rx_fcs_errors; 224 u64 rx_alignment_errors; 225 u64 rx_fragment_errors; 226 u64 rx_jabber_errors; 227 u64 rx_undersize_frame_errors; 228 u64 rx_oversize_frame_errors; 229 u64 rx_dropped_frames; 230 u64 rx_unicast_byte_count; 231 u64 rx_broadcast_byte_count; 232 u64 rx_multicast_byte_count; 233 u64 rx_unicast_frames; 234 u64 rx_broadcast_frames; 235 u64 rx_multicast_frames; 236 u64 rx_pause_frames; 237 u64 rx_64_byte_frames; 238 u64 rx_65_127_byte_frames; 239 u64 rx_128_255_byte_frames; 240 u64 rx_256_511_bytes_frames; 241 u64 rx_512_1023_byte_frames; 242 u64 rx_1024_1518_byte_frames; 243 u64 rx_greater_1518_byte_frames; 244 u64 eee_rx_lpi_transitions; 245 u64 eee_rx_lpi_time; 246 u64 tx_fcs_errors; 247 u64 tx_excess_deferral_errors; 248 u64 tx_carrier_errors; 249 u64 tx_bad_byte_count; 250 u64 tx_single_collisions; 251 u64 tx_multiple_collisions; 252 u64 tx_excessive_collision; 253 u64 tx_late_collisions; 254 u64 tx_unicast_byte_count; 255 u64 tx_broadcast_byte_count; 256 u64 tx_multicast_byte_count; 257 u64 tx_unicast_frames; 258 u64 tx_broadcast_frames; 259 u64 tx_multicast_frames; 260 u64 tx_pause_frames; 261 u64 tx_64_byte_frames; 262 u64 tx_65_127_byte_frames; 263 u64 tx_128_255_byte_frames; 264 u64 tx_256_511_bytes_frames; 265 u64 tx_512_1023_byte_frames; 266 u64 tx_1024_1518_byte_frames; 267 u64 tx_greater_1518_byte_frames; 268 u64 eee_tx_lpi_transitions; 269 u64 eee_tx_lpi_time; 270 }; 271 272 static u32 lan78xx_regs[] = { 273 ID_REV, 274 INT_STS, 275 HW_CFG, 276 PMT_CTL, 277 E2P_CMD, 278 E2P_DATA, 279 USB_STATUS, 280 VLAN_TYPE, 281 MAC_CR, 282 MAC_RX, 283 MAC_TX, 284 FLOW, 285 ERR_STS, 286 MII_ACC, 287 MII_DATA, 288 EEE_TX_LPI_REQ_DLY, 289 EEE_TW_TX_SYS, 290 EEE_TX_LPI_REM_DLY, 291 WUCSR 292 }; 293 294 #define PHY_REG_SIZE (32 * sizeof(u32)) 295 296 struct lan78xx_net; 297 298 struct lan78xx_priv { 299 struct lan78xx_net *dev; 300 u32 rfe_ctl; 301 u32 mchash_table[DP_SEL_VHF_HASH_LEN]; /* multicat hash table */ 302 u32 pfilter_table[NUM_OF_MAF][2]; /* perfect filter table */ 303 u32 vlan_table[DP_SEL_VHF_VLAN_LEN]; 304 struct mutex dataport_mutex; /* for dataport access */ 305 spinlock_t rfe_ctl_lock; /* for rfe register access */ 306 struct work_struct set_multicast; 307 struct work_struct set_vlan; 308 u32 wol; 309 }; 310 311 enum skb_state { 312 illegal = 0, 313 tx_start, 314 tx_done, 315 rx_start, 316 rx_done, 317 rx_cleanup, 318 unlink_start 319 }; 320 321 struct skb_data { /* skb->cb is one of these */ 322 struct urb *urb; 323 struct lan78xx_net *dev; 324 enum skb_state state; 325 size_t length; 326 int num_of_packet; 327 }; 328 329 struct usb_context { 330 struct usb_ctrlrequest req; 331 struct lan78xx_net *dev; 332 }; 333 334 #define EVENT_TX_HALT 0 335 #define EVENT_RX_HALT 1 336 #define EVENT_RX_MEMORY 2 337 #define EVENT_STS_SPLIT 3 338 #define EVENT_LINK_RESET 4 339 #define EVENT_RX_PAUSED 5 340 #define EVENT_DEV_WAKING 6 341 #define EVENT_DEV_ASLEEP 7 342 #define EVENT_DEV_OPEN 8 343 #define EVENT_STAT_UPDATE 9 344 345 struct statstage { 346 struct mutex access_lock; /* for stats access */ 347 struct lan78xx_statstage saved; 348 struct lan78xx_statstage rollover_count; 349 struct lan78xx_statstage rollover_max; 350 struct lan78xx_statstage64 curr_stat; 351 }; 352 353 struct irq_domain_data { 354 struct irq_domain *irqdomain; 355 unsigned int phyirq; 356 struct irq_chip *irqchip; 357 irq_flow_handler_t irq_handler; 358 u32 irqenable; 359 struct mutex irq_lock; /* for irq bus access */ 360 }; 361 362 struct lan78xx_net { 363 struct net_device *net; 364 struct usb_device *udev; 365 struct usb_interface *intf; 366 void *driver_priv; 367 368 int rx_qlen; 369 int tx_qlen; 370 struct sk_buff_head rxq; 371 struct sk_buff_head txq; 372 struct sk_buff_head done; 373 struct sk_buff_head rxq_pause; 374 struct sk_buff_head txq_pend; 375 376 struct tasklet_struct bh; 377 struct delayed_work wq; 378 379 struct usb_host_endpoint *ep_blkin; 380 struct usb_host_endpoint *ep_blkout; 381 struct usb_host_endpoint *ep_intr; 382 383 int msg_enable; 384 385 struct urb *urb_intr; 386 struct usb_anchor deferred; 387 388 struct mutex phy_mutex; /* for phy access */ 389 unsigned pipe_in, pipe_out, pipe_intr; 390 391 u32 hard_mtu; /* count any extra framing */ 392 size_t rx_urb_size; /* size for rx urbs */ 393 394 unsigned long flags; 395 396 wait_queue_head_t *wait; 397 unsigned char suspend_count; 398 399 unsigned maxpacket; 400 struct timer_list delay; 401 struct timer_list stat_monitor; 402 403 unsigned long data[5]; 404 405 int link_on; 406 u8 mdix_ctrl; 407 408 u32 chipid; 409 u32 chiprev; 410 struct mii_bus *mdiobus; 411 phy_interface_t interface; 412 413 int fc_autoneg; 414 u8 fc_request_control; 415 416 int delta; 417 struct statstage stats; 418 419 struct irq_domain_data domain_data; 420 }; 421 422 /* define external phy id */ 423 #define PHY_LAN8835 (0x0007C130) 424 #define PHY_KSZ9031RNX (0x00221620) 425 426 /* use ethtool to change the level for any given device */ 427 static int msg_level = -1; 428 module_param(msg_level, int, 0); 429 MODULE_PARM_DESC(msg_level, "Override default message level"); 430 431 static int lan78xx_read_reg(struct lan78xx_net *dev, u32 index, u32 *data) 432 { 433 u32 *buf = kmalloc(sizeof(u32), GFP_KERNEL); 434 int ret; 435 436 if (!buf) 437 return -ENOMEM; 438 439 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), 440 USB_VENDOR_REQUEST_READ_REGISTER, 441 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 442 0, index, buf, 4, USB_CTRL_GET_TIMEOUT); 443 if (likely(ret >= 0)) { 444 le32_to_cpus(buf); 445 *data = *buf; 446 } else { 447 netdev_warn(dev->net, 448 "Failed to read register index 0x%08x. ret = %d", 449 index, ret); 450 } 451 452 kfree(buf); 453 454 return ret; 455 } 456 457 static int lan78xx_write_reg(struct lan78xx_net *dev, u32 index, u32 data) 458 { 459 u32 *buf = kmalloc(sizeof(u32), GFP_KERNEL); 460 int ret; 461 462 if (!buf) 463 return -ENOMEM; 464 465 *buf = data; 466 cpu_to_le32s(buf); 467 468 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), 469 USB_VENDOR_REQUEST_WRITE_REGISTER, 470 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 471 0, index, buf, 4, USB_CTRL_SET_TIMEOUT); 472 if (unlikely(ret < 0)) { 473 netdev_warn(dev->net, 474 "Failed to write register index 0x%08x. ret = %d", 475 index, ret); 476 } 477 478 kfree(buf); 479 480 return ret; 481 } 482 483 static int lan78xx_read_stats(struct lan78xx_net *dev, 484 struct lan78xx_statstage *data) 485 { 486 int ret = 0; 487 int i; 488 struct lan78xx_statstage *stats; 489 u32 *src; 490 u32 *dst; 491 492 stats = kmalloc(sizeof(*stats), GFP_KERNEL); 493 if (!stats) 494 return -ENOMEM; 495 496 ret = usb_control_msg(dev->udev, 497 usb_rcvctrlpipe(dev->udev, 0), 498 USB_VENDOR_REQUEST_GET_STATS, 499 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 500 0, 501 0, 502 (void *)stats, 503 sizeof(*stats), 504 USB_CTRL_SET_TIMEOUT); 505 if (likely(ret >= 0)) { 506 src = (u32 *)stats; 507 dst = (u32 *)data; 508 for (i = 0; i < sizeof(*stats)/sizeof(u32); i++) { 509 le32_to_cpus(&src[i]); 510 dst[i] = src[i]; 511 } 512 } else { 513 netdev_warn(dev->net, 514 "Failed to read stat ret = 0x%x", ret); 515 } 516 517 kfree(stats); 518 519 return ret; 520 } 521 522 #define check_counter_rollover(struct1, dev_stats, member) { \ 523 if (struct1->member < dev_stats.saved.member) \ 524 dev_stats.rollover_count.member++; \ 525 } 526 527 static void lan78xx_check_stat_rollover(struct lan78xx_net *dev, 528 struct lan78xx_statstage *stats) 529 { 530 check_counter_rollover(stats, dev->stats, rx_fcs_errors); 531 check_counter_rollover(stats, dev->stats, rx_alignment_errors); 532 check_counter_rollover(stats, dev->stats, rx_fragment_errors); 533 check_counter_rollover(stats, dev->stats, rx_jabber_errors); 534 check_counter_rollover(stats, dev->stats, rx_undersize_frame_errors); 535 check_counter_rollover(stats, dev->stats, rx_oversize_frame_errors); 536 check_counter_rollover(stats, dev->stats, rx_dropped_frames); 537 check_counter_rollover(stats, dev->stats, rx_unicast_byte_count); 538 check_counter_rollover(stats, dev->stats, rx_broadcast_byte_count); 539 check_counter_rollover(stats, dev->stats, rx_multicast_byte_count); 540 check_counter_rollover(stats, dev->stats, rx_unicast_frames); 541 check_counter_rollover(stats, dev->stats, rx_broadcast_frames); 542 check_counter_rollover(stats, dev->stats, rx_multicast_frames); 543 check_counter_rollover(stats, dev->stats, rx_pause_frames); 544 check_counter_rollover(stats, dev->stats, rx_64_byte_frames); 545 check_counter_rollover(stats, dev->stats, rx_65_127_byte_frames); 546 check_counter_rollover(stats, dev->stats, rx_128_255_byte_frames); 547 check_counter_rollover(stats, dev->stats, rx_256_511_bytes_frames); 548 check_counter_rollover(stats, dev->stats, rx_512_1023_byte_frames); 549 check_counter_rollover(stats, dev->stats, rx_1024_1518_byte_frames); 550 check_counter_rollover(stats, dev->stats, rx_greater_1518_byte_frames); 551 check_counter_rollover(stats, dev->stats, eee_rx_lpi_transitions); 552 check_counter_rollover(stats, dev->stats, eee_rx_lpi_time); 553 check_counter_rollover(stats, dev->stats, tx_fcs_errors); 554 check_counter_rollover(stats, dev->stats, tx_excess_deferral_errors); 555 check_counter_rollover(stats, dev->stats, tx_carrier_errors); 556 check_counter_rollover(stats, dev->stats, tx_bad_byte_count); 557 check_counter_rollover(stats, dev->stats, tx_single_collisions); 558 check_counter_rollover(stats, dev->stats, tx_multiple_collisions); 559 check_counter_rollover(stats, dev->stats, tx_excessive_collision); 560 check_counter_rollover(stats, dev->stats, tx_late_collisions); 561 check_counter_rollover(stats, dev->stats, tx_unicast_byte_count); 562 check_counter_rollover(stats, dev->stats, tx_broadcast_byte_count); 563 check_counter_rollover(stats, dev->stats, tx_multicast_byte_count); 564 check_counter_rollover(stats, dev->stats, tx_unicast_frames); 565 check_counter_rollover(stats, dev->stats, tx_broadcast_frames); 566 check_counter_rollover(stats, dev->stats, tx_multicast_frames); 567 check_counter_rollover(stats, dev->stats, tx_pause_frames); 568 check_counter_rollover(stats, dev->stats, tx_64_byte_frames); 569 check_counter_rollover(stats, dev->stats, tx_65_127_byte_frames); 570 check_counter_rollover(stats, dev->stats, tx_128_255_byte_frames); 571 check_counter_rollover(stats, dev->stats, tx_256_511_bytes_frames); 572 check_counter_rollover(stats, dev->stats, tx_512_1023_byte_frames); 573 check_counter_rollover(stats, dev->stats, tx_1024_1518_byte_frames); 574 check_counter_rollover(stats, dev->stats, tx_greater_1518_byte_frames); 575 check_counter_rollover(stats, dev->stats, eee_tx_lpi_transitions); 576 check_counter_rollover(stats, dev->stats, eee_tx_lpi_time); 577 578 memcpy(&dev->stats.saved, stats, sizeof(struct lan78xx_statstage)); 579 } 580 581 static void lan78xx_update_stats(struct lan78xx_net *dev) 582 { 583 u32 *p, *count, *max; 584 u64 *data; 585 int i; 586 struct lan78xx_statstage lan78xx_stats; 587 588 if (usb_autopm_get_interface(dev->intf) < 0) 589 return; 590 591 p = (u32 *)&lan78xx_stats; 592 count = (u32 *)&dev->stats.rollover_count; 593 max = (u32 *)&dev->stats.rollover_max; 594 data = (u64 *)&dev->stats.curr_stat; 595 596 mutex_lock(&dev->stats.access_lock); 597 598 if (lan78xx_read_stats(dev, &lan78xx_stats) > 0) 599 lan78xx_check_stat_rollover(dev, &lan78xx_stats); 600 601 for (i = 0; i < (sizeof(lan78xx_stats) / (sizeof(u32))); i++) 602 data[i] = (u64)p[i] + ((u64)count[i] * ((u64)max[i] + 1)); 603 604 mutex_unlock(&dev->stats.access_lock); 605 606 usb_autopm_put_interface(dev->intf); 607 } 608 609 /* Loop until the read is completed with timeout called with phy_mutex held */ 610 static int lan78xx_phy_wait_not_busy(struct lan78xx_net *dev) 611 { 612 unsigned long start_time = jiffies; 613 u32 val; 614 int ret; 615 616 do { 617 ret = lan78xx_read_reg(dev, MII_ACC, &val); 618 if (unlikely(ret < 0)) 619 return -EIO; 620 621 if (!(val & MII_ACC_MII_BUSY_)) 622 return 0; 623 } while (!time_after(jiffies, start_time + HZ)); 624 625 return -EIO; 626 } 627 628 static inline u32 mii_access(int id, int index, int read) 629 { 630 u32 ret; 631 632 ret = ((u32)id << MII_ACC_PHY_ADDR_SHIFT_) & MII_ACC_PHY_ADDR_MASK_; 633 ret |= ((u32)index << MII_ACC_MIIRINDA_SHIFT_) & MII_ACC_MIIRINDA_MASK_; 634 if (read) 635 ret |= MII_ACC_MII_READ_; 636 else 637 ret |= MII_ACC_MII_WRITE_; 638 ret |= MII_ACC_MII_BUSY_; 639 640 return ret; 641 } 642 643 static int lan78xx_wait_eeprom(struct lan78xx_net *dev) 644 { 645 unsigned long start_time = jiffies; 646 u32 val; 647 int ret; 648 649 do { 650 ret = lan78xx_read_reg(dev, E2P_CMD, &val); 651 if (unlikely(ret < 0)) 652 return -EIO; 653 654 if (!(val & E2P_CMD_EPC_BUSY_) || 655 (val & E2P_CMD_EPC_TIMEOUT_)) 656 break; 657 usleep_range(40, 100); 658 } while (!time_after(jiffies, start_time + HZ)); 659 660 if (val & (E2P_CMD_EPC_TIMEOUT_ | E2P_CMD_EPC_BUSY_)) { 661 netdev_warn(dev->net, "EEPROM read operation timeout"); 662 return -EIO; 663 } 664 665 return 0; 666 } 667 668 static int lan78xx_eeprom_confirm_not_busy(struct lan78xx_net *dev) 669 { 670 unsigned long start_time = jiffies; 671 u32 val; 672 int ret; 673 674 do { 675 ret = lan78xx_read_reg(dev, E2P_CMD, &val); 676 if (unlikely(ret < 0)) 677 return -EIO; 678 679 if (!(val & E2P_CMD_EPC_BUSY_)) 680 return 0; 681 682 usleep_range(40, 100); 683 } while (!time_after(jiffies, start_time + HZ)); 684 685 netdev_warn(dev->net, "EEPROM is busy"); 686 return -EIO; 687 } 688 689 static int lan78xx_read_raw_eeprom(struct lan78xx_net *dev, u32 offset, 690 u32 length, u8 *data) 691 { 692 u32 val; 693 u32 saved; 694 int i, ret; 695 int retval; 696 697 /* depends on chip, some EEPROM pins are muxed with LED function. 698 * disable & restore LED function to access EEPROM. 699 */ 700 ret = lan78xx_read_reg(dev, HW_CFG, &val); 701 saved = val; 702 if (dev->chipid == ID_REV_CHIP_ID_7800_) { 703 val &= ~(HW_CFG_LED1_EN_ | HW_CFG_LED0_EN_); 704 ret = lan78xx_write_reg(dev, HW_CFG, val); 705 } 706 707 retval = lan78xx_eeprom_confirm_not_busy(dev); 708 if (retval) 709 return retval; 710 711 for (i = 0; i < length; i++) { 712 val = E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_READ_; 713 val |= (offset & E2P_CMD_EPC_ADDR_MASK_); 714 ret = lan78xx_write_reg(dev, E2P_CMD, val); 715 if (unlikely(ret < 0)) { 716 retval = -EIO; 717 goto exit; 718 } 719 720 retval = lan78xx_wait_eeprom(dev); 721 if (retval < 0) 722 goto exit; 723 724 ret = lan78xx_read_reg(dev, E2P_DATA, &val); 725 if (unlikely(ret < 0)) { 726 retval = -EIO; 727 goto exit; 728 } 729 730 data[i] = val & 0xFF; 731 offset++; 732 } 733 734 retval = 0; 735 exit: 736 if (dev->chipid == ID_REV_CHIP_ID_7800_) 737 ret = lan78xx_write_reg(dev, HW_CFG, saved); 738 739 return retval; 740 } 741 742 static int lan78xx_read_eeprom(struct lan78xx_net *dev, u32 offset, 743 u32 length, u8 *data) 744 { 745 u8 sig; 746 int ret; 747 748 ret = lan78xx_read_raw_eeprom(dev, 0, 1, &sig); 749 if ((ret == 0) && (sig == EEPROM_INDICATOR)) 750 ret = lan78xx_read_raw_eeprom(dev, offset, length, data); 751 else 752 ret = -EINVAL; 753 754 return ret; 755 } 756 757 static int lan78xx_write_raw_eeprom(struct lan78xx_net *dev, u32 offset, 758 u32 length, u8 *data) 759 { 760 u32 val; 761 u32 saved; 762 int i, ret; 763 int retval; 764 765 /* depends on chip, some EEPROM pins are muxed with LED function. 766 * disable & restore LED function to access EEPROM. 767 */ 768 ret = lan78xx_read_reg(dev, HW_CFG, &val); 769 saved = val; 770 if (dev->chipid == ID_REV_CHIP_ID_7800_) { 771 val &= ~(HW_CFG_LED1_EN_ | HW_CFG_LED0_EN_); 772 ret = lan78xx_write_reg(dev, HW_CFG, val); 773 } 774 775 retval = lan78xx_eeprom_confirm_not_busy(dev); 776 if (retval) 777 goto exit; 778 779 /* Issue write/erase enable command */ 780 val = E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_EWEN_; 781 ret = lan78xx_write_reg(dev, E2P_CMD, val); 782 if (unlikely(ret < 0)) { 783 retval = -EIO; 784 goto exit; 785 } 786 787 retval = lan78xx_wait_eeprom(dev); 788 if (retval < 0) 789 goto exit; 790 791 for (i = 0; i < length; i++) { 792 /* Fill data register */ 793 val = data[i]; 794 ret = lan78xx_write_reg(dev, E2P_DATA, val); 795 if (ret < 0) { 796 retval = -EIO; 797 goto exit; 798 } 799 800 /* Send "write" command */ 801 val = E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_WRITE_; 802 val |= (offset & E2P_CMD_EPC_ADDR_MASK_); 803 ret = lan78xx_write_reg(dev, E2P_CMD, val); 804 if (ret < 0) { 805 retval = -EIO; 806 goto exit; 807 } 808 809 retval = lan78xx_wait_eeprom(dev); 810 if (retval < 0) 811 goto exit; 812 813 offset++; 814 } 815 816 retval = 0; 817 exit: 818 if (dev->chipid == ID_REV_CHIP_ID_7800_) 819 ret = lan78xx_write_reg(dev, HW_CFG, saved); 820 821 return retval; 822 } 823 824 static int lan78xx_read_raw_otp(struct lan78xx_net *dev, u32 offset, 825 u32 length, u8 *data) 826 { 827 int i; 828 int ret; 829 u32 buf; 830 unsigned long timeout; 831 832 ret = lan78xx_read_reg(dev, OTP_PWR_DN, &buf); 833 834 if (buf & OTP_PWR_DN_PWRDN_N_) { 835 /* clear it and wait to be cleared */ 836 ret = lan78xx_write_reg(dev, OTP_PWR_DN, 0); 837 838 timeout = jiffies + HZ; 839 do { 840 usleep_range(1, 10); 841 ret = lan78xx_read_reg(dev, OTP_PWR_DN, &buf); 842 if (time_after(jiffies, timeout)) { 843 netdev_warn(dev->net, 844 "timeout on OTP_PWR_DN"); 845 return -EIO; 846 } 847 } while (buf & OTP_PWR_DN_PWRDN_N_); 848 } 849 850 for (i = 0; i < length; i++) { 851 ret = lan78xx_write_reg(dev, OTP_ADDR1, 852 ((offset + i) >> 8) & OTP_ADDR1_15_11); 853 ret = lan78xx_write_reg(dev, OTP_ADDR2, 854 ((offset + i) & OTP_ADDR2_10_3)); 855 856 ret = lan78xx_write_reg(dev, OTP_FUNC_CMD, OTP_FUNC_CMD_READ_); 857 ret = lan78xx_write_reg(dev, OTP_CMD_GO, OTP_CMD_GO_GO_); 858 859 timeout = jiffies + HZ; 860 do { 861 udelay(1); 862 ret = lan78xx_read_reg(dev, OTP_STATUS, &buf); 863 if (time_after(jiffies, timeout)) { 864 netdev_warn(dev->net, 865 "timeout on OTP_STATUS"); 866 return -EIO; 867 } 868 } while (buf & OTP_STATUS_BUSY_); 869 870 ret = lan78xx_read_reg(dev, OTP_RD_DATA, &buf); 871 872 data[i] = (u8)(buf & 0xFF); 873 } 874 875 return 0; 876 } 877 878 static int lan78xx_write_raw_otp(struct lan78xx_net *dev, u32 offset, 879 u32 length, u8 *data) 880 { 881 int i; 882 int ret; 883 u32 buf; 884 unsigned long timeout; 885 886 ret = lan78xx_read_reg(dev, OTP_PWR_DN, &buf); 887 888 if (buf & OTP_PWR_DN_PWRDN_N_) { 889 /* clear it and wait to be cleared */ 890 ret = lan78xx_write_reg(dev, OTP_PWR_DN, 0); 891 892 timeout = jiffies + HZ; 893 do { 894 udelay(1); 895 ret = lan78xx_read_reg(dev, OTP_PWR_DN, &buf); 896 if (time_after(jiffies, timeout)) { 897 netdev_warn(dev->net, 898 "timeout on OTP_PWR_DN completion"); 899 return -EIO; 900 } 901 } while (buf & OTP_PWR_DN_PWRDN_N_); 902 } 903 904 /* set to BYTE program mode */ 905 ret = lan78xx_write_reg(dev, OTP_PRGM_MODE, OTP_PRGM_MODE_BYTE_); 906 907 for (i = 0; i < length; i++) { 908 ret = lan78xx_write_reg(dev, OTP_ADDR1, 909 ((offset + i) >> 8) & OTP_ADDR1_15_11); 910 ret = lan78xx_write_reg(dev, OTP_ADDR2, 911 ((offset + i) & OTP_ADDR2_10_3)); 912 ret = lan78xx_write_reg(dev, OTP_PRGM_DATA, data[i]); 913 ret = lan78xx_write_reg(dev, OTP_TST_CMD, OTP_TST_CMD_PRGVRFY_); 914 ret = lan78xx_write_reg(dev, OTP_CMD_GO, OTP_CMD_GO_GO_); 915 916 timeout = jiffies + HZ; 917 do { 918 udelay(1); 919 ret = lan78xx_read_reg(dev, OTP_STATUS, &buf); 920 if (time_after(jiffies, timeout)) { 921 netdev_warn(dev->net, 922 "Timeout on OTP_STATUS completion"); 923 return -EIO; 924 } 925 } while (buf & OTP_STATUS_BUSY_); 926 } 927 928 return 0; 929 } 930 931 static int lan78xx_read_otp(struct lan78xx_net *dev, u32 offset, 932 u32 length, u8 *data) 933 { 934 u8 sig; 935 int ret; 936 937 ret = lan78xx_read_raw_otp(dev, 0, 1, &sig); 938 939 if (ret == 0) { 940 if (sig == OTP_INDICATOR_2) 941 offset += 0x100; 942 else if (sig != OTP_INDICATOR_1) 943 ret = -EINVAL; 944 if (!ret) 945 ret = lan78xx_read_raw_otp(dev, offset, length, data); 946 } 947 948 return ret; 949 } 950 951 static int lan78xx_dataport_wait_not_busy(struct lan78xx_net *dev) 952 { 953 int i, ret; 954 955 for (i = 0; i < 100; i++) { 956 u32 dp_sel; 957 958 ret = lan78xx_read_reg(dev, DP_SEL, &dp_sel); 959 if (unlikely(ret < 0)) 960 return -EIO; 961 962 if (dp_sel & DP_SEL_DPRDY_) 963 return 0; 964 965 usleep_range(40, 100); 966 } 967 968 netdev_warn(dev->net, "lan78xx_dataport_wait_not_busy timed out"); 969 970 return -EIO; 971 } 972 973 static int lan78xx_dataport_write(struct lan78xx_net *dev, u32 ram_select, 974 u32 addr, u32 length, u32 *buf) 975 { 976 struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); 977 u32 dp_sel; 978 int i, ret; 979 980 if (usb_autopm_get_interface(dev->intf) < 0) 981 return 0; 982 983 mutex_lock(&pdata->dataport_mutex); 984 985 ret = lan78xx_dataport_wait_not_busy(dev); 986 if (ret < 0) 987 goto done; 988 989 ret = lan78xx_read_reg(dev, DP_SEL, &dp_sel); 990 991 dp_sel &= ~DP_SEL_RSEL_MASK_; 992 dp_sel |= ram_select; 993 ret = lan78xx_write_reg(dev, DP_SEL, dp_sel); 994 995 for (i = 0; i < length; i++) { 996 ret = lan78xx_write_reg(dev, DP_ADDR, addr + i); 997 998 ret = lan78xx_write_reg(dev, DP_DATA, buf[i]); 999 1000 ret = lan78xx_write_reg(dev, DP_CMD, DP_CMD_WRITE_); 1001 1002 ret = lan78xx_dataport_wait_not_busy(dev); 1003 if (ret < 0) 1004 goto done; 1005 } 1006 1007 done: 1008 mutex_unlock(&pdata->dataport_mutex); 1009 usb_autopm_put_interface(dev->intf); 1010 1011 return ret; 1012 } 1013 1014 static void lan78xx_set_addr_filter(struct lan78xx_priv *pdata, 1015 int index, u8 addr[ETH_ALEN]) 1016 { 1017 u32 temp; 1018 1019 if ((pdata) && (index > 0) && (index < NUM_OF_MAF)) { 1020 temp = addr[3]; 1021 temp = addr[2] | (temp << 8); 1022 temp = addr[1] | (temp << 8); 1023 temp = addr[0] | (temp << 8); 1024 pdata->pfilter_table[index][1] = temp; 1025 temp = addr[5]; 1026 temp = addr[4] | (temp << 8); 1027 temp |= MAF_HI_VALID_ | MAF_HI_TYPE_DST_; 1028 pdata->pfilter_table[index][0] = temp; 1029 } 1030 } 1031 1032 /* returns hash bit number for given MAC address */ 1033 static inline u32 lan78xx_hash(char addr[ETH_ALEN]) 1034 { 1035 return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff; 1036 } 1037 1038 static void lan78xx_deferred_multicast_write(struct work_struct *param) 1039 { 1040 struct lan78xx_priv *pdata = 1041 container_of(param, struct lan78xx_priv, set_multicast); 1042 struct lan78xx_net *dev = pdata->dev; 1043 int i; 1044 int ret; 1045 1046 netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n", 1047 pdata->rfe_ctl); 1048 1049 lan78xx_dataport_write(dev, DP_SEL_RSEL_VLAN_DA_, DP_SEL_VHF_VLAN_LEN, 1050 DP_SEL_VHF_HASH_LEN, pdata->mchash_table); 1051 1052 for (i = 1; i < NUM_OF_MAF; i++) { 1053 ret = lan78xx_write_reg(dev, MAF_HI(i), 0); 1054 ret = lan78xx_write_reg(dev, MAF_LO(i), 1055 pdata->pfilter_table[i][1]); 1056 ret = lan78xx_write_reg(dev, MAF_HI(i), 1057 pdata->pfilter_table[i][0]); 1058 } 1059 1060 ret = lan78xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); 1061 } 1062 1063 static void lan78xx_set_multicast(struct net_device *netdev) 1064 { 1065 struct lan78xx_net *dev = netdev_priv(netdev); 1066 struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); 1067 unsigned long flags; 1068 int i; 1069 1070 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags); 1071 1072 pdata->rfe_ctl &= ~(RFE_CTL_UCAST_EN_ | RFE_CTL_MCAST_EN_ | 1073 RFE_CTL_DA_PERFECT_ | RFE_CTL_MCAST_HASH_); 1074 1075 for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++) 1076 pdata->mchash_table[i] = 0; 1077 /* pfilter_table[0] has own HW address */ 1078 for (i = 1; i < NUM_OF_MAF; i++) { 1079 pdata->pfilter_table[i][0] = 1080 pdata->pfilter_table[i][1] = 0; 1081 } 1082 1083 pdata->rfe_ctl |= RFE_CTL_BCAST_EN_; 1084 1085 if (dev->net->flags & IFF_PROMISC) { 1086 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled"); 1087 pdata->rfe_ctl |= RFE_CTL_MCAST_EN_ | RFE_CTL_UCAST_EN_; 1088 } else { 1089 if (dev->net->flags & IFF_ALLMULTI) { 1090 netif_dbg(dev, drv, dev->net, 1091 "receive all multicast enabled"); 1092 pdata->rfe_ctl |= RFE_CTL_MCAST_EN_; 1093 } 1094 } 1095 1096 if (netdev_mc_count(dev->net)) { 1097 struct netdev_hw_addr *ha; 1098 int i; 1099 1100 netif_dbg(dev, drv, dev->net, "receive multicast hash filter"); 1101 1102 pdata->rfe_ctl |= RFE_CTL_DA_PERFECT_; 1103 1104 i = 1; 1105 netdev_for_each_mc_addr(ha, netdev) { 1106 /* set first 32 into Perfect Filter */ 1107 if (i < 33) { 1108 lan78xx_set_addr_filter(pdata, i, ha->addr); 1109 } else { 1110 u32 bitnum = lan78xx_hash(ha->addr); 1111 1112 pdata->mchash_table[bitnum / 32] |= 1113 (1 << (bitnum % 32)); 1114 pdata->rfe_ctl |= RFE_CTL_MCAST_HASH_; 1115 } 1116 i++; 1117 } 1118 } 1119 1120 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags); 1121 1122 /* defer register writes to a sleepable context */ 1123 schedule_work(&pdata->set_multicast); 1124 } 1125 1126 static int lan78xx_update_flowcontrol(struct lan78xx_net *dev, u8 duplex, 1127 u16 lcladv, u16 rmtadv) 1128 { 1129 u32 flow = 0, fct_flow = 0; 1130 int ret; 1131 u8 cap; 1132 1133 if (dev->fc_autoneg) 1134 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv); 1135 else 1136 cap = dev->fc_request_control; 1137 1138 if (cap & FLOW_CTRL_TX) 1139 flow |= (FLOW_CR_TX_FCEN_ | 0xFFFF); 1140 1141 if (cap & FLOW_CTRL_RX) 1142 flow |= FLOW_CR_RX_FCEN_; 1143 1144 if (dev->udev->speed == USB_SPEED_SUPER) 1145 fct_flow = 0x817; 1146 else if (dev->udev->speed == USB_SPEED_HIGH) 1147 fct_flow = 0x211; 1148 1149 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s", 1150 (cap & FLOW_CTRL_RX ? "enabled" : "disabled"), 1151 (cap & FLOW_CTRL_TX ? "enabled" : "disabled")); 1152 1153 ret = lan78xx_write_reg(dev, FCT_FLOW, fct_flow); 1154 1155 /* threshold value should be set before enabling flow */ 1156 ret = lan78xx_write_reg(dev, FLOW, flow); 1157 1158 return 0; 1159 } 1160 1161 static int lan78xx_link_reset(struct lan78xx_net *dev) 1162 { 1163 struct phy_device *phydev = dev->net->phydev; 1164 struct ethtool_link_ksettings ecmd; 1165 int ladv, radv, ret; 1166 u32 buf; 1167 1168 /* clear LAN78xx interrupt status */ 1169 ret = lan78xx_write_reg(dev, INT_STS, INT_STS_PHY_INT_); 1170 if (unlikely(ret < 0)) 1171 return -EIO; 1172 1173 phy_read_status(phydev); 1174 1175 if (!phydev->link && dev->link_on) { 1176 dev->link_on = false; 1177 1178 /* reset MAC */ 1179 ret = lan78xx_read_reg(dev, MAC_CR, &buf); 1180 if (unlikely(ret < 0)) 1181 return -EIO; 1182 buf |= MAC_CR_RST_; 1183 ret = lan78xx_write_reg(dev, MAC_CR, buf); 1184 if (unlikely(ret < 0)) 1185 return -EIO; 1186 1187 del_timer(&dev->stat_monitor); 1188 } else if (phydev->link && !dev->link_on) { 1189 dev->link_on = true; 1190 1191 phy_ethtool_ksettings_get(phydev, &ecmd); 1192 1193 if (dev->udev->speed == USB_SPEED_SUPER) { 1194 if (ecmd.base.speed == 1000) { 1195 /* disable U2 */ 1196 ret = lan78xx_read_reg(dev, USB_CFG1, &buf); 1197 buf &= ~USB_CFG1_DEV_U2_INIT_EN_; 1198 ret = lan78xx_write_reg(dev, USB_CFG1, buf); 1199 /* enable U1 */ 1200 ret = lan78xx_read_reg(dev, USB_CFG1, &buf); 1201 buf |= USB_CFG1_DEV_U1_INIT_EN_; 1202 ret = lan78xx_write_reg(dev, USB_CFG1, buf); 1203 } else { 1204 /* enable U1 & U2 */ 1205 ret = lan78xx_read_reg(dev, USB_CFG1, &buf); 1206 buf |= USB_CFG1_DEV_U2_INIT_EN_; 1207 buf |= USB_CFG1_DEV_U1_INIT_EN_; 1208 ret = lan78xx_write_reg(dev, USB_CFG1, buf); 1209 } 1210 } 1211 1212 ladv = phy_read(phydev, MII_ADVERTISE); 1213 if (ladv < 0) 1214 return ladv; 1215 1216 radv = phy_read(phydev, MII_LPA); 1217 if (radv < 0) 1218 return radv; 1219 1220 netif_dbg(dev, link, dev->net, 1221 "speed: %u duplex: %d anadv: 0x%04x anlpa: 0x%04x", 1222 ecmd.base.speed, ecmd.base.duplex, ladv, radv); 1223 1224 ret = lan78xx_update_flowcontrol(dev, ecmd.base.duplex, ladv, 1225 radv); 1226 1227 if (!timer_pending(&dev->stat_monitor)) { 1228 dev->delta = 1; 1229 mod_timer(&dev->stat_monitor, 1230 jiffies + STAT_UPDATE_TIMER); 1231 } 1232 1233 tasklet_schedule(&dev->bh); 1234 } 1235 1236 return ret; 1237 } 1238 1239 /* some work can't be done in tasklets, so we use keventd 1240 * 1241 * NOTE: annoying asymmetry: if it's active, schedule_work() fails, 1242 * but tasklet_schedule() doesn't. hope the failure is rare. 1243 */ 1244 static void lan78xx_defer_kevent(struct lan78xx_net *dev, int work) 1245 { 1246 set_bit(work, &dev->flags); 1247 if (!schedule_delayed_work(&dev->wq, 0)) 1248 netdev_err(dev->net, "kevent %d may have been dropped\n", work); 1249 } 1250 1251 static void lan78xx_status(struct lan78xx_net *dev, struct urb *urb) 1252 { 1253 u32 intdata; 1254 1255 if (urb->actual_length != 4) { 1256 netdev_warn(dev->net, 1257 "unexpected urb length %d", urb->actual_length); 1258 return; 1259 } 1260 1261 memcpy(&intdata, urb->transfer_buffer, 4); 1262 le32_to_cpus(&intdata); 1263 1264 if (intdata & INT_ENP_PHY_INT) { 1265 netif_dbg(dev, link, dev->net, "PHY INTR: 0x%08x\n", intdata); 1266 lan78xx_defer_kevent(dev, EVENT_LINK_RESET); 1267 1268 if (dev->domain_data.phyirq > 0) 1269 generic_handle_irq(dev->domain_data.phyirq); 1270 } else 1271 netdev_warn(dev->net, 1272 "unexpected interrupt: 0x%08x\n", intdata); 1273 } 1274 1275 static int lan78xx_ethtool_get_eeprom_len(struct net_device *netdev) 1276 { 1277 return MAX_EEPROM_SIZE; 1278 } 1279 1280 static int lan78xx_ethtool_get_eeprom(struct net_device *netdev, 1281 struct ethtool_eeprom *ee, u8 *data) 1282 { 1283 struct lan78xx_net *dev = netdev_priv(netdev); 1284 int ret; 1285 1286 ret = usb_autopm_get_interface(dev->intf); 1287 if (ret) 1288 return ret; 1289 1290 ee->magic = LAN78XX_EEPROM_MAGIC; 1291 1292 ret = lan78xx_read_raw_eeprom(dev, ee->offset, ee->len, data); 1293 1294 usb_autopm_put_interface(dev->intf); 1295 1296 return ret; 1297 } 1298 1299 static int lan78xx_ethtool_set_eeprom(struct net_device *netdev, 1300 struct ethtool_eeprom *ee, u8 *data) 1301 { 1302 struct lan78xx_net *dev = netdev_priv(netdev); 1303 int ret; 1304 1305 ret = usb_autopm_get_interface(dev->intf); 1306 if (ret) 1307 return ret; 1308 1309 /* Invalid EEPROM_INDICATOR at offset zero will result in a failure 1310 * to load data from EEPROM 1311 */ 1312 if (ee->magic == LAN78XX_EEPROM_MAGIC) 1313 ret = lan78xx_write_raw_eeprom(dev, ee->offset, ee->len, data); 1314 else if ((ee->magic == LAN78XX_OTP_MAGIC) && 1315 (ee->offset == 0) && 1316 (ee->len == 512) && 1317 (data[0] == OTP_INDICATOR_1)) 1318 ret = lan78xx_write_raw_otp(dev, ee->offset, ee->len, data); 1319 1320 usb_autopm_put_interface(dev->intf); 1321 1322 return ret; 1323 } 1324 1325 static void lan78xx_get_strings(struct net_device *netdev, u32 stringset, 1326 u8 *data) 1327 { 1328 if (stringset == ETH_SS_STATS) 1329 memcpy(data, lan78xx_gstrings, sizeof(lan78xx_gstrings)); 1330 } 1331 1332 static int lan78xx_get_sset_count(struct net_device *netdev, int sset) 1333 { 1334 if (sset == ETH_SS_STATS) 1335 return ARRAY_SIZE(lan78xx_gstrings); 1336 else 1337 return -EOPNOTSUPP; 1338 } 1339 1340 static void lan78xx_get_stats(struct net_device *netdev, 1341 struct ethtool_stats *stats, u64 *data) 1342 { 1343 struct lan78xx_net *dev = netdev_priv(netdev); 1344 1345 lan78xx_update_stats(dev); 1346 1347 mutex_lock(&dev->stats.access_lock); 1348 memcpy(data, &dev->stats.curr_stat, sizeof(dev->stats.curr_stat)); 1349 mutex_unlock(&dev->stats.access_lock); 1350 } 1351 1352 static void lan78xx_get_wol(struct net_device *netdev, 1353 struct ethtool_wolinfo *wol) 1354 { 1355 struct lan78xx_net *dev = netdev_priv(netdev); 1356 int ret; 1357 u32 buf; 1358 struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); 1359 1360 if (usb_autopm_get_interface(dev->intf) < 0) 1361 return; 1362 1363 ret = lan78xx_read_reg(dev, USB_CFG0, &buf); 1364 if (unlikely(ret < 0)) { 1365 wol->supported = 0; 1366 wol->wolopts = 0; 1367 } else { 1368 if (buf & USB_CFG_RMT_WKP_) { 1369 wol->supported = WAKE_ALL; 1370 wol->wolopts = pdata->wol; 1371 } else { 1372 wol->supported = 0; 1373 wol->wolopts = 0; 1374 } 1375 } 1376 1377 usb_autopm_put_interface(dev->intf); 1378 } 1379 1380 static int lan78xx_set_wol(struct net_device *netdev, 1381 struct ethtool_wolinfo *wol) 1382 { 1383 struct lan78xx_net *dev = netdev_priv(netdev); 1384 struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); 1385 int ret; 1386 1387 ret = usb_autopm_get_interface(dev->intf); 1388 if (ret < 0) 1389 return ret; 1390 1391 if (wol->wolopts & ~WAKE_ALL) 1392 return -EINVAL; 1393 1394 pdata->wol = wol->wolopts; 1395 1396 device_set_wakeup_enable(&dev->udev->dev, (bool)wol->wolopts); 1397 1398 phy_ethtool_set_wol(netdev->phydev, wol); 1399 1400 usb_autopm_put_interface(dev->intf); 1401 1402 return ret; 1403 } 1404 1405 static int lan78xx_get_eee(struct net_device *net, struct ethtool_eee *edata) 1406 { 1407 struct lan78xx_net *dev = netdev_priv(net); 1408 struct phy_device *phydev = net->phydev; 1409 int ret; 1410 u32 buf; 1411 1412 ret = usb_autopm_get_interface(dev->intf); 1413 if (ret < 0) 1414 return ret; 1415 1416 ret = phy_ethtool_get_eee(phydev, edata); 1417 if (ret < 0) 1418 goto exit; 1419 1420 ret = lan78xx_read_reg(dev, MAC_CR, &buf); 1421 if (buf & MAC_CR_EEE_EN_) { 1422 edata->eee_enabled = true; 1423 edata->eee_active = !!(edata->advertised & 1424 edata->lp_advertised); 1425 edata->tx_lpi_enabled = true; 1426 /* EEE_TX_LPI_REQ_DLY & tx_lpi_timer are same uSec unit */ 1427 ret = lan78xx_read_reg(dev, EEE_TX_LPI_REQ_DLY, &buf); 1428 edata->tx_lpi_timer = buf; 1429 } else { 1430 edata->eee_enabled = false; 1431 edata->eee_active = false; 1432 edata->tx_lpi_enabled = false; 1433 edata->tx_lpi_timer = 0; 1434 } 1435 1436 ret = 0; 1437 exit: 1438 usb_autopm_put_interface(dev->intf); 1439 1440 return ret; 1441 } 1442 1443 static int lan78xx_set_eee(struct net_device *net, struct ethtool_eee *edata) 1444 { 1445 struct lan78xx_net *dev = netdev_priv(net); 1446 int ret; 1447 u32 buf; 1448 1449 ret = usb_autopm_get_interface(dev->intf); 1450 if (ret < 0) 1451 return ret; 1452 1453 if (edata->eee_enabled) { 1454 ret = lan78xx_read_reg(dev, MAC_CR, &buf); 1455 buf |= MAC_CR_EEE_EN_; 1456 ret = lan78xx_write_reg(dev, MAC_CR, buf); 1457 1458 phy_ethtool_set_eee(net->phydev, edata); 1459 1460 buf = (u32)edata->tx_lpi_timer; 1461 ret = lan78xx_write_reg(dev, EEE_TX_LPI_REQ_DLY, buf); 1462 } else { 1463 ret = lan78xx_read_reg(dev, MAC_CR, &buf); 1464 buf &= ~MAC_CR_EEE_EN_; 1465 ret = lan78xx_write_reg(dev, MAC_CR, buf); 1466 } 1467 1468 usb_autopm_put_interface(dev->intf); 1469 1470 return 0; 1471 } 1472 1473 static u32 lan78xx_get_link(struct net_device *net) 1474 { 1475 phy_read_status(net->phydev); 1476 1477 return net->phydev->link; 1478 } 1479 1480 static void lan78xx_get_drvinfo(struct net_device *net, 1481 struct ethtool_drvinfo *info) 1482 { 1483 struct lan78xx_net *dev = netdev_priv(net); 1484 1485 strncpy(info->driver, DRIVER_NAME, sizeof(info->driver)); 1486 usb_make_path(dev->udev, info->bus_info, sizeof(info->bus_info)); 1487 } 1488 1489 static u32 lan78xx_get_msglevel(struct net_device *net) 1490 { 1491 struct lan78xx_net *dev = netdev_priv(net); 1492 1493 return dev->msg_enable; 1494 } 1495 1496 static void lan78xx_set_msglevel(struct net_device *net, u32 level) 1497 { 1498 struct lan78xx_net *dev = netdev_priv(net); 1499 1500 dev->msg_enable = level; 1501 } 1502 1503 static int lan78xx_get_link_ksettings(struct net_device *net, 1504 struct ethtool_link_ksettings *cmd) 1505 { 1506 struct lan78xx_net *dev = netdev_priv(net); 1507 struct phy_device *phydev = net->phydev; 1508 int ret; 1509 1510 ret = usb_autopm_get_interface(dev->intf); 1511 if (ret < 0) 1512 return ret; 1513 1514 phy_ethtool_ksettings_get(phydev, cmd); 1515 1516 usb_autopm_put_interface(dev->intf); 1517 1518 return ret; 1519 } 1520 1521 static int lan78xx_set_link_ksettings(struct net_device *net, 1522 const struct ethtool_link_ksettings *cmd) 1523 { 1524 struct lan78xx_net *dev = netdev_priv(net); 1525 struct phy_device *phydev = net->phydev; 1526 int ret = 0; 1527 int temp; 1528 1529 ret = usb_autopm_get_interface(dev->intf); 1530 if (ret < 0) 1531 return ret; 1532 1533 /* change speed & duplex */ 1534 ret = phy_ethtool_ksettings_set(phydev, cmd); 1535 1536 if (!cmd->base.autoneg) { 1537 /* force link down */ 1538 temp = phy_read(phydev, MII_BMCR); 1539 phy_write(phydev, MII_BMCR, temp | BMCR_LOOPBACK); 1540 mdelay(1); 1541 phy_write(phydev, MII_BMCR, temp); 1542 } 1543 1544 usb_autopm_put_interface(dev->intf); 1545 1546 return ret; 1547 } 1548 1549 static void lan78xx_get_pause(struct net_device *net, 1550 struct ethtool_pauseparam *pause) 1551 { 1552 struct lan78xx_net *dev = netdev_priv(net); 1553 struct phy_device *phydev = net->phydev; 1554 struct ethtool_link_ksettings ecmd; 1555 1556 phy_ethtool_ksettings_get(phydev, &ecmd); 1557 1558 pause->autoneg = dev->fc_autoneg; 1559 1560 if (dev->fc_request_control & FLOW_CTRL_TX) 1561 pause->tx_pause = 1; 1562 1563 if (dev->fc_request_control & FLOW_CTRL_RX) 1564 pause->rx_pause = 1; 1565 } 1566 1567 static int lan78xx_set_pause(struct net_device *net, 1568 struct ethtool_pauseparam *pause) 1569 { 1570 struct lan78xx_net *dev = netdev_priv(net); 1571 struct phy_device *phydev = net->phydev; 1572 struct ethtool_link_ksettings ecmd; 1573 int ret; 1574 1575 phy_ethtool_ksettings_get(phydev, &ecmd); 1576 1577 if (pause->autoneg && !ecmd.base.autoneg) { 1578 ret = -EINVAL; 1579 goto exit; 1580 } 1581 1582 dev->fc_request_control = 0; 1583 if (pause->rx_pause) 1584 dev->fc_request_control |= FLOW_CTRL_RX; 1585 1586 if (pause->tx_pause) 1587 dev->fc_request_control |= FLOW_CTRL_TX; 1588 1589 if (ecmd.base.autoneg) { 1590 __ETHTOOL_DECLARE_LINK_MODE_MASK(fc) = { 0, }; 1591 u32 mii_adv; 1592 1593 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, 1594 ecmd.link_modes.advertising); 1595 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 1596 ecmd.link_modes.advertising); 1597 mii_adv = (u32)mii_advertise_flowctrl(dev->fc_request_control); 1598 mii_adv_to_linkmode_adv_t(fc, mii_adv); 1599 linkmode_or(ecmd.link_modes.advertising, fc, 1600 ecmd.link_modes.advertising); 1601 1602 phy_ethtool_ksettings_set(phydev, &ecmd); 1603 } 1604 1605 dev->fc_autoneg = pause->autoneg; 1606 1607 ret = 0; 1608 exit: 1609 return ret; 1610 } 1611 1612 static int lan78xx_get_regs_len(struct net_device *netdev) 1613 { 1614 if (!netdev->phydev) 1615 return (sizeof(lan78xx_regs)); 1616 else 1617 return (sizeof(lan78xx_regs) + PHY_REG_SIZE); 1618 } 1619 1620 static void 1621 lan78xx_get_regs(struct net_device *netdev, struct ethtool_regs *regs, 1622 void *buf) 1623 { 1624 u32 *data = buf; 1625 int i, j; 1626 struct lan78xx_net *dev = netdev_priv(netdev); 1627 1628 /* Read Device/MAC registers */ 1629 for (i = 0; i < ARRAY_SIZE(lan78xx_regs); i++) 1630 lan78xx_read_reg(dev, lan78xx_regs[i], &data[i]); 1631 1632 if (!netdev->phydev) 1633 return; 1634 1635 /* Read PHY registers */ 1636 for (j = 0; j < 32; i++, j++) 1637 data[i] = phy_read(netdev->phydev, j); 1638 } 1639 1640 static const struct ethtool_ops lan78xx_ethtool_ops = { 1641 .get_link = lan78xx_get_link, 1642 .nway_reset = phy_ethtool_nway_reset, 1643 .get_drvinfo = lan78xx_get_drvinfo, 1644 .get_msglevel = lan78xx_get_msglevel, 1645 .set_msglevel = lan78xx_set_msglevel, 1646 .get_eeprom_len = lan78xx_ethtool_get_eeprom_len, 1647 .get_eeprom = lan78xx_ethtool_get_eeprom, 1648 .set_eeprom = lan78xx_ethtool_set_eeprom, 1649 .get_ethtool_stats = lan78xx_get_stats, 1650 .get_sset_count = lan78xx_get_sset_count, 1651 .get_strings = lan78xx_get_strings, 1652 .get_wol = lan78xx_get_wol, 1653 .set_wol = lan78xx_set_wol, 1654 .get_eee = lan78xx_get_eee, 1655 .set_eee = lan78xx_set_eee, 1656 .get_pauseparam = lan78xx_get_pause, 1657 .set_pauseparam = lan78xx_set_pause, 1658 .get_link_ksettings = lan78xx_get_link_ksettings, 1659 .set_link_ksettings = lan78xx_set_link_ksettings, 1660 .get_regs_len = lan78xx_get_regs_len, 1661 .get_regs = lan78xx_get_regs, 1662 }; 1663 1664 static int lan78xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd) 1665 { 1666 if (!netif_running(netdev)) 1667 return -EINVAL; 1668 1669 return phy_mii_ioctl(netdev->phydev, rq, cmd); 1670 } 1671 1672 static void lan78xx_init_mac_address(struct lan78xx_net *dev) 1673 { 1674 u32 addr_lo, addr_hi; 1675 int ret; 1676 u8 addr[6]; 1677 1678 ret = lan78xx_read_reg(dev, RX_ADDRL, &addr_lo); 1679 ret = lan78xx_read_reg(dev, RX_ADDRH, &addr_hi); 1680 1681 addr[0] = addr_lo & 0xFF; 1682 addr[1] = (addr_lo >> 8) & 0xFF; 1683 addr[2] = (addr_lo >> 16) & 0xFF; 1684 addr[3] = (addr_lo >> 24) & 0xFF; 1685 addr[4] = addr_hi & 0xFF; 1686 addr[5] = (addr_hi >> 8) & 0xFF; 1687 1688 if (!is_valid_ether_addr(addr)) { 1689 if (!eth_platform_get_mac_address(&dev->udev->dev, addr)) { 1690 /* valid address present in Device Tree */ 1691 netif_dbg(dev, ifup, dev->net, 1692 "MAC address read from Device Tree"); 1693 } else if (((lan78xx_read_eeprom(dev, EEPROM_MAC_OFFSET, 1694 ETH_ALEN, addr) == 0) || 1695 (lan78xx_read_otp(dev, EEPROM_MAC_OFFSET, 1696 ETH_ALEN, addr) == 0)) && 1697 is_valid_ether_addr(addr)) { 1698 /* eeprom values are valid so use them */ 1699 netif_dbg(dev, ifup, dev->net, 1700 "MAC address read from EEPROM"); 1701 } else { 1702 /* generate random MAC */ 1703 eth_random_addr(addr); 1704 netif_dbg(dev, ifup, dev->net, 1705 "MAC address set to random addr"); 1706 } 1707 1708 addr_lo = addr[0] | (addr[1] << 8) | 1709 (addr[2] << 16) | (addr[3] << 24); 1710 addr_hi = addr[4] | (addr[5] << 8); 1711 1712 ret = lan78xx_write_reg(dev, RX_ADDRL, addr_lo); 1713 ret = lan78xx_write_reg(dev, RX_ADDRH, addr_hi); 1714 } 1715 1716 ret = lan78xx_write_reg(dev, MAF_LO(0), addr_lo); 1717 ret = lan78xx_write_reg(dev, MAF_HI(0), addr_hi | MAF_HI_VALID_); 1718 1719 ether_addr_copy(dev->net->dev_addr, addr); 1720 } 1721 1722 /* MDIO read and write wrappers for phylib */ 1723 static int lan78xx_mdiobus_read(struct mii_bus *bus, int phy_id, int idx) 1724 { 1725 struct lan78xx_net *dev = bus->priv; 1726 u32 val, addr; 1727 int ret; 1728 1729 ret = usb_autopm_get_interface(dev->intf); 1730 if (ret < 0) 1731 return ret; 1732 1733 mutex_lock(&dev->phy_mutex); 1734 1735 /* confirm MII not busy */ 1736 ret = lan78xx_phy_wait_not_busy(dev); 1737 if (ret < 0) 1738 goto done; 1739 1740 /* set the address, index & direction (read from PHY) */ 1741 addr = mii_access(phy_id, idx, MII_READ); 1742 ret = lan78xx_write_reg(dev, MII_ACC, addr); 1743 1744 ret = lan78xx_phy_wait_not_busy(dev); 1745 if (ret < 0) 1746 goto done; 1747 1748 ret = lan78xx_read_reg(dev, MII_DATA, &val); 1749 1750 ret = (int)(val & 0xFFFF); 1751 1752 done: 1753 mutex_unlock(&dev->phy_mutex); 1754 usb_autopm_put_interface(dev->intf); 1755 1756 return ret; 1757 } 1758 1759 static int lan78xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 1760 u16 regval) 1761 { 1762 struct lan78xx_net *dev = bus->priv; 1763 u32 val, addr; 1764 int ret; 1765 1766 ret = usb_autopm_get_interface(dev->intf); 1767 if (ret < 0) 1768 return ret; 1769 1770 mutex_lock(&dev->phy_mutex); 1771 1772 /* confirm MII not busy */ 1773 ret = lan78xx_phy_wait_not_busy(dev); 1774 if (ret < 0) 1775 goto done; 1776 1777 val = (u32)regval; 1778 ret = lan78xx_write_reg(dev, MII_DATA, val); 1779 1780 /* set the address, index & direction (write to PHY) */ 1781 addr = mii_access(phy_id, idx, MII_WRITE); 1782 ret = lan78xx_write_reg(dev, MII_ACC, addr); 1783 1784 ret = lan78xx_phy_wait_not_busy(dev); 1785 if (ret < 0) 1786 goto done; 1787 1788 done: 1789 mutex_unlock(&dev->phy_mutex); 1790 usb_autopm_put_interface(dev->intf); 1791 return 0; 1792 } 1793 1794 static int lan78xx_mdio_init(struct lan78xx_net *dev) 1795 { 1796 struct device_node *node; 1797 int ret; 1798 1799 dev->mdiobus = mdiobus_alloc(); 1800 if (!dev->mdiobus) { 1801 netdev_err(dev->net, "can't allocate MDIO bus\n"); 1802 return -ENOMEM; 1803 } 1804 1805 dev->mdiobus->priv = (void *)dev; 1806 dev->mdiobus->read = lan78xx_mdiobus_read; 1807 dev->mdiobus->write = lan78xx_mdiobus_write; 1808 dev->mdiobus->name = "lan78xx-mdiobus"; 1809 1810 snprintf(dev->mdiobus->id, MII_BUS_ID_SIZE, "usb-%03d:%03d", 1811 dev->udev->bus->busnum, dev->udev->devnum); 1812 1813 switch (dev->chipid) { 1814 case ID_REV_CHIP_ID_7800_: 1815 case ID_REV_CHIP_ID_7850_: 1816 /* set to internal PHY id */ 1817 dev->mdiobus->phy_mask = ~(1 << 1); 1818 break; 1819 case ID_REV_CHIP_ID_7801_: 1820 /* scan thru PHYAD[2..0] */ 1821 dev->mdiobus->phy_mask = ~(0xFF); 1822 break; 1823 } 1824 1825 node = of_get_child_by_name(dev->udev->dev.of_node, "mdio"); 1826 ret = of_mdiobus_register(dev->mdiobus, node); 1827 of_node_put(node); 1828 if (ret) { 1829 netdev_err(dev->net, "can't register MDIO bus\n"); 1830 goto exit1; 1831 } 1832 1833 netdev_dbg(dev->net, "registered mdiobus bus %s\n", dev->mdiobus->id); 1834 return 0; 1835 exit1: 1836 mdiobus_free(dev->mdiobus); 1837 return ret; 1838 } 1839 1840 static void lan78xx_remove_mdio(struct lan78xx_net *dev) 1841 { 1842 mdiobus_unregister(dev->mdiobus); 1843 mdiobus_free(dev->mdiobus); 1844 } 1845 1846 static void lan78xx_link_status_change(struct net_device *net) 1847 { 1848 struct phy_device *phydev = net->phydev; 1849 int ret, temp; 1850 1851 /* At forced 100 F/H mode, chip may fail to set mode correctly 1852 * when cable is switched between long(~50+m) and short one. 1853 * As workaround, set to 10 before setting to 100 1854 * at forced 100 F/H mode. 1855 */ 1856 if (!phydev->autoneg && (phydev->speed == 100)) { 1857 /* disable phy interrupt */ 1858 temp = phy_read(phydev, LAN88XX_INT_MASK); 1859 temp &= ~LAN88XX_INT_MASK_MDINTPIN_EN_; 1860 ret = phy_write(phydev, LAN88XX_INT_MASK, temp); 1861 1862 temp = phy_read(phydev, MII_BMCR); 1863 temp &= ~(BMCR_SPEED100 | BMCR_SPEED1000); 1864 phy_write(phydev, MII_BMCR, temp); /* set to 10 first */ 1865 temp |= BMCR_SPEED100; 1866 phy_write(phydev, MII_BMCR, temp); /* set to 100 later */ 1867 1868 /* clear pending interrupt generated while workaround */ 1869 temp = phy_read(phydev, LAN88XX_INT_STS); 1870 1871 /* enable phy interrupt back */ 1872 temp = phy_read(phydev, LAN88XX_INT_MASK); 1873 temp |= LAN88XX_INT_MASK_MDINTPIN_EN_; 1874 ret = phy_write(phydev, LAN88XX_INT_MASK, temp); 1875 } 1876 } 1877 1878 static int irq_map(struct irq_domain *d, unsigned int irq, 1879 irq_hw_number_t hwirq) 1880 { 1881 struct irq_domain_data *data = d->host_data; 1882 1883 irq_set_chip_data(irq, data); 1884 irq_set_chip_and_handler(irq, data->irqchip, data->irq_handler); 1885 irq_set_noprobe(irq); 1886 1887 return 0; 1888 } 1889 1890 static void irq_unmap(struct irq_domain *d, unsigned int irq) 1891 { 1892 irq_set_chip_and_handler(irq, NULL, NULL); 1893 irq_set_chip_data(irq, NULL); 1894 } 1895 1896 static const struct irq_domain_ops chip_domain_ops = { 1897 .map = irq_map, 1898 .unmap = irq_unmap, 1899 }; 1900 1901 static void lan78xx_irq_mask(struct irq_data *irqd) 1902 { 1903 struct irq_domain_data *data = irq_data_get_irq_chip_data(irqd); 1904 1905 data->irqenable &= ~BIT(irqd_to_hwirq(irqd)); 1906 } 1907 1908 static void lan78xx_irq_unmask(struct irq_data *irqd) 1909 { 1910 struct irq_domain_data *data = irq_data_get_irq_chip_data(irqd); 1911 1912 data->irqenable |= BIT(irqd_to_hwirq(irqd)); 1913 } 1914 1915 static void lan78xx_irq_bus_lock(struct irq_data *irqd) 1916 { 1917 struct irq_domain_data *data = irq_data_get_irq_chip_data(irqd); 1918 1919 mutex_lock(&data->irq_lock); 1920 } 1921 1922 static void lan78xx_irq_bus_sync_unlock(struct irq_data *irqd) 1923 { 1924 struct irq_domain_data *data = irq_data_get_irq_chip_data(irqd); 1925 struct lan78xx_net *dev = 1926 container_of(data, struct lan78xx_net, domain_data); 1927 u32 buf; 1928 int ret; 1929 1930 /* call register access here because irq_bus_lock & irq_bus_sync_unlock 1931 * are only two callbacks executed in non-atomic contex. 1932 */ 1933 ret = lan78xx_read_reg(dev, INT_EP_CTL, &buf); 1934 if (buf != data->irqenable) 1935 ret = lan78xx_write_reg(dev, INT_EP_CTL, data->irqenable); 1936 1937 mutex_unlock(&data->irq_lock); 1938 } 1939 1940 static struct irq_chip lan78xx_irqchip = { 1941 .name = "lan78xx-irqs", 1942 .irq_mask = lan78xx_irq_mask, 1943 .irq_unmask = lan78xx_irq_unmask, 1944 .irq_bus_lock = lan78xx_irq_bus_lock, 1945 .irq_bus_sync_unlock = lan78xx_irq_bus_sync_unlock, 1946 }; 1947 1948 static int lan78xx_setup_irq_domain(struct lan78xx_net *dev) 1949 { 1950 struct device_node *of_node; 1951 struct irq_domain *irqdomain; 1952 unsigned int irqmap = 0; 1953 u32 buf; 1954 int ret = 0; 1955 1956 of_node = dev->udev->dev.parent->of_node; 1957 1958 mutex_init(&dev->domain_data.irq_lock); 1959 1960 lan78xx_read_reg(dev, INT_EP_CTL, &buf); 1961 dev->domain_data.irqenable = buf; 1962 1963 dev->domain_data.irqchip = &lan78xx_irqchip; 1964 dev->domain_data.irq_handler = handle_simple_irq; 1965 1966 irqdomain = irq_domain_add_simple(of_node, MAX_INT_EP, 0, 1967 &chip_domain_ops, &dev->domain_data); 1968 if (irqdomain) { 1969 /* create mapping for PHY interrupt */ 1970 irqmap = irq_create_mapping(irqdomain, INT_EP_PHY); 1971 if (!irqmap) { 1972 irq_domain_remove(irqdomain); 1973 1974 irqdomain = NULL; 1975 ret = -EINVAL; 1976 } 1977 } else { 1978 ret = -EINVAL; 1979 } 1980 1981 dev->domain_data.irqdomain = irqdomain; 1982 dev->domain_data.phyirq = irqmap; 1983 1984 return ret; 1985 } 1986 1987 static void lan78xx_remove_irq_domain(struct lan78xx_net *dev) 1988 { 1989 if (dev->domain_data.phyirq > 0) { 1990 irq_dispose_mapping(dev->domain_data.phyirq); 1991 1992 if (dev->domain_data.irqdomain) 1993 irq_domain_remove(dev->domain_data.irqdomain); 1994 } 1995 dev->domain_data.phyirq = 0; 1996 dev->domain_data.irqdomain = NULL; 1997 } 1998 1999 static int lan8835_fixup(struct phy_device *phydev) 2000 { 2001 int buf; 2002 int ret; 2003 struct lan78xx_net *dev = netdev_priv(phydev->attached_dev); 2004 2005 /* LED2/PME_N/IRQ_N/RGMII_ID pin to IRQ_N mode */ 2006 buf = phy_read_mmd(phydev, MDIO_MMD_PCS, 0x8010); 2007 buf &= ~0x1800; 2008 buf |= 0x0800; 2009 phy_write_mmd(phydev, MDIO_MMD_PCS, 0x8010, buf); 2010 2011 /* RGMII MAC TXC Delay Enable */ 2012 ret = lan78xx_write_reg(dev, MAC_RGMII_ID, 2013 MAC_RGMII_ID_TXC_DELAY_EN_); 2014 2015 /* RGMII TX DLL Tune Adjust */ 2016 ret = lan78xx_write_reg(dev, RGMII_TX_BYP_DLL, 0x3D00); 2017 2018 dev->interface = PHY_INTERFACE_MODE_RGMII_TXID; 2019 2020 return 1; 2021 } 2022 2023 static int ksz9031rnx_fixup(struct phy_device *phydev) 2024 { 2025 struct lan78xx_net *dev = netdev_priv(phydev->attached_dev); 2026 2027 /* Micrel9301RNX PHY configuration */ 2028 /* RGMII Control Signal Pad Skew */ 2029 phy_write_mmd(phydev, MDIO_MMD_WIS, 4, 0x0077); 2030 /* RGMII RX Data Pad Skew */ 2031 phy_write_mmd(phydev, MDIO_MMD_WIS, 5, 0x7777); 2032 /* RGMII RX Clock Pad Skew */ 2033 phy_write_mmd(phydev, MDIO_MMD_WIS, 8, 0x1FF); 2034 2035 dev->interface = PHY_INTERFACE_MODE_RGMII_RXID; 2036 2037 return 1; 2038 } 2039 2040 static struct phy_device *lan7801_phy_init(struct lan78xx_net *dev) 2041 { 2042 u32 buf; 2043 int ret; 2044 struct fixed_phy_status fphy_status = { 2045 .link = 1, 2046 .speed = SPEED_1000, 2047 .duplex = DUPLEX_FULL, 2048 }; 2049 struct phy_device *phydev; 2050 2051 phydev = phy_find_first(dev->mdiobus); 2052 if (!phydev) { 2053 netdev_dbg(dev->net, "PHY Not Found!! Registering Fixed PHY\n"); 2054 phydev = fixed_phy_register(PHY_POLL, &fphy_status, -1, 2055 NULL); 2056 if (IS_ERR(phydev)) { 2057 netdev_err(dev->net, "No PHY/fixed_PHY found\n"); 2058 return NULL; 2059 } 2060 netdev_dbg(dev->net, "Registered FIXED PHY\n"); 2061 dev->interface = PHY_INTERFACE_MODE_RGMII; 2062 ret = lan78xx_write_reg(dev, MAC_RGMII_ID, 2063 MAC_RGMII_ID_TXC_DELAY_EN_); 2064 ret = lan78xx_write_reg(dev, RGMII_TX_BYP_DLL, 0x3D00); 2065 ret = lan78xx_read_reg(dev, HW_CFG, &buf); 2066 buf |= HW_CFG_CLK125_EN_; 2067 buf |= HW_CFG_REFCLK25_EN_; 2068 ret = lan78xx_write_reg(dev, HW_CFG, buf); 2069 } else { 2070 if (!phydev->drv) { 2071 netdev_err(dev->net, "no PHY driver found\n"); 2072 return NULL; 2073 } 2074 dev->interface = PHY_INTERFACE_MODE_RGMII; 2075 /* external PHY fixup for KSZ9031RNX */ 2076 ret = phy_register_fixup_for_uid(PHY_KSZ9031RNX, 0xfffffff0, 2077 ksz9031rnx_fixup); 2078 if (ret < 0) { 2079 netdev_err(dev->net, "Failed to register fixup for PHY_KSZ9031RNX\n"); 2080 return NULL; 2081 } 2082 /* external PHY fixup for LAN8835 */ 2083 ret = phy_register_fixup_for_uid(PHY_LAN8835, 0xfffffff0, 2084 lan8835_fixup); 2085 if (ret < 0) { 2086 netdev_err(dev->net, "Failed to register fixup for PHY_LAN8835\n"); 2087 return NULL; 2088 } 2089 /* add more external PHY fixup here if needed */ 2090 2091 phydev->is_internal = false; 2092 } 2093 return phydev; 2094 } 2095 2096 static int lan78xx_phy_init(struct lan78xx_net *dev) 2097 { 2098 __ETHTOOL_DECLARE_LINK_MODE_MASK(fc) = { 0, }; 2099 int ret; 2100 u32 mii_adv; 2101 struct phy_device *phydev; 2102 2103 switch (dev->chipid) { 2104 case ID_REV_CHIP_ID_7801_: 2105 phydev = lan7801_phy_init(dev); 2106 if (!phydev) { 2107 netdev_err(dev->net, "lan7801: PHY Init Failed"); 2108 return -EIO; 2109 } 2110 break; 2111 2112 case ID_REV_CHIP_ID_7800_: 2113 case ID_REV_CHIP_ID_7850_: 2114 phydev = phy_find_first(dev->mdiobus); 2115 if (!phydev) { 2116 netdev_err(dev->net, "no PHY found\n"); 2117 return -EIO; 2118 } 2119 phydev->is_internal = true; 2120 dev->interface = PHY_INTERFACE_MODE_GMII; 2121 break; 2122 2123 default: 2124 netdev_err(dev->net, "Unknown CHIP ID found\n"); 2125 return -EIO; 2126 } 2127 2128 /* if phyirq is not set, use polling mode in phylib */ 2129 if (dev->domain_data.phyirq > 0) 2130 phydev->irq = dev->domain_data.phyirq; 2131 else 2132 phydev->irq = 0; 2133 netdev_dbg(dev->net, "phydev->irq = %d\n", phydev->irq); 2134 2135 /* set to AUTOMDIX */ 2136 phydev->mdix = ETH_TP_MDI_AUTO; 2137 2138 ret = phy_connect_direct(dev->net, phydev, 2139 lan78xx_link_status_change, 2140 dev->interface); 2141 if (ret) { 2142 netdev_err(dev->net, "can't attach PHY to %s\n", 2143 dev->mdiobus->id); 2144 if (dev->chipid == ID_REV_CHIP_ID_7801_) { 2145 if (phy_is_pseudo_fixed_link(phydev)) { 2146 fixed_phy_unregister(phydev); 2147 } else { 2148 phy_unregister_fixup_for_uid(PHY_KSZ9031RNX, 2149 0xfffffff0); 2150 phy_unregister_fixup_for_uid(PHY_LAN8835, 2151 0xfffffff0); 2152 } 2153 } 2154 return -EIO; 2155 } 2156 2157 /* MAC doesn't support 1000T Half */ 2158 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT); 2159 2160 /* support both flow controls */ 2161 dev->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX); 2162 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, 2163 phydev->advertising); 2164 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 2165 phydev->advertising); 2166 mii_adv = (u32)mii_advertise_flowctrl(dev->fc_request_control); 2167 mii_adv_to_linkmode_adv_t(fc, mii_adv); 2168 linkmode_or(phydev->advertising, fc, phydev->advertising); 2169 2170 if (phydev->mdio.dev.of_node) { 2171 u32 reg; 2172 int len; 2173 2174 len = of_property_count_elems_of_size(phydev->mdio.dev.of_node, 2175 "microchip,led-modes", 2176 sizeof(u32)); 2177 if (len >= 0) { 2178 /* Ensure the appropriate LEDs are enabled */ 2179 lan78xx_read_reg(dev, HW_CFG, ®); 2180 reg &= ~(HW_CFG_LED0_EN_ | 2181 HW_CFG_LED1_EN_ | 2182 HW_CFG_LED2_EN_ | 2183 HW_CFG_LED3_EN_); 2184 reg |= (len > 0) * HW_CFG_LED0_EN_ | 2185 (len > 1) * HW_CFG_LED1_EN_ | 2186 (len > 2) * HW_CFG_LED2_EN_ | 2187 (len > 3) * HW_CFG_LED3_EN_; 2188 lan78xx_write_reg(dev, HW_CFG, reg); 2189 } 2190 } 2191 2192 genphy_config_aneg(phydev); 2193 2194 dev->fc_autoneg = phydev->autoneg; 2195 2196 return 0; 2197 } 2198 2199 static int lan78xx_set_rx_max_frame_length(struct lan78xx_net *dev, int size) 2200 { 2201 int ret = 0; 2202 u32 buf; 2203 bool rxenabled; 2204 2205 ret = lan78xx_read_reg(dev, MAC_RX, &buf); 2206 2207 rxenabled = ((buf & MAC_RX_RXEN_) != 0); 2208 2209 if (rxenabled) { 2210 buf &= ~MAC_RX_RXEN_; 2211 ret = lan78xx_write_reg(dev, MAC_RX, buf); 2212 } 2213 2214 /* add 4 to size for FCS */ 2215 buf &= ~MAC_RX_MAX_SIZE_MASK_; 2216 buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT_) & MAC_RX_MAX_SIZE_MASK_); 2217 2218 ret = lan78xx_write_reg(dev, MAC_RX, buf); 2219 2220 if (rxenabled) { 2221 buf |= MAC_RX_RXEN_; 2222 ret = lan78xx_write_reg(dev, MAC_RX, buf); 2223 } 2224 2225 return 0; 2226 } 2227 2228 static int unlink_urbs(struct lan78xx_net *dev, struct sk_buff_head *q) 2229 { 2230 struct sk_buff *skb; 2231 unsigned long flags; 2232 int count = 0; 2233 2234 spin_lock_irqsave(&q->lock, flags); 2235 while (!skb_queue_empty(q)) { 2236 struct skb_data *entry; 2237 struct urb *urb; 2238 int ret; 2239 2240 skb_queue_walk(q, skb) { 2241 entry = (struct skb_data *)skb->cb; 2242 if (entry->state != unlink_start) 2243 goto found; 2244 } 2245 break; 2246 found: 2247 entry->state = unlink_start; 2248 urb = entry->urb; 2249 2250 /* Get reference count of the URB to avoid it to be 2251 * freed during usb_unlink_urb, which may trigger 2252 * use-after-free problem inside usb_unlink_urb since 2253 * usb_unlink_urb is always racing with .complete 2254 * handler(include defer_bh). 2255 */ 2256 usb_get_urb(urb); 2257 spin_unlock_irqrestore(&q->lock, flags); 2258 /* during some PM-driven resume scenarios, 2259 * these (async) unlinks complete immediately 2260 */ 2261 ret = usb_unlink_urb(urb); 2262 if (ret != -EINPROGRESS && ret != 0) 2263 netdev_dbg(dev->net, "unlink urb err, %d\n", ret); 2264 else 2265 count++; 2266 usb_put_urb(urb); 2267 spin_lock_irqsave(&q->lock, flags); 2268 } 2269 spin_unlock_irqrestore(&q->lock, flags); 2270 return count; 2271 } 2272 2273 static int lan78xx_change_mtu(struct net_device *netdev, int new_mtu) 2274 { 2275 struct lan78xx_net *dev = netdev_priv(netdev); 2276 int ll_mtu = new_mtu + netdev->hard_header_len; 2277 int old_hard_mtu = dev->hard_mtu; 2278 int old_rx_urb_size = dev->rx_urb_size; 2279 int ret; 2280 2281 /* no second zero-length packet read wanted after mtu-sized packets */ 2282 if ((ll_mtu % dev->maxpacket) == 0) 2283 return -EDOM; 2284 2285 ret = lan78xx_set_rx_max_frame_length(dev, new_mtu + VLAN_ETH_HLEN); 2286 2287 netdev->mtu = new_mtu; 2288 2289 dev->hard_mtu = netdev->mtu + netdev->hard_header_len; 2290 if (dev->rx_urb_size == old_hard_mtu) { 2291 dev->rx_urb_size = dev->hard_mtu; 2292 if (dev->rx_urb_size > old_rx_urb_size) { 2293 if (netif_running(dev->net)) { 2294 unlink_urbs(dev, &dev->rxq); 2295 tasklet_schedule(&dev->bh); 2296 } 2297 } 2298 } 2299 2300 return 0; 2301 } 2302 2303 static int lan78xx_set_mac_addr(struct net_device *netdev, void *p) 2304 { 2305 struct lan78xx_net *dev = netdev_priv(netdev); 2306 struct sockaddr *addr = p; 2307 u32 addr_lo, addr_hi; 2308 int ret; 2309 2310 if (netif_running(netdev)) 2311 return -EBUSY; 2312 2313 if (!is_valid_ether_addr(addr->sa_data)) 2314 return -EADDRNOTAVAIL; 2315 2316 ether_addr_copy(netdev->dev_addr, addr->sa_data); 2317 2318 addr_lo = netdev->dev_addr[0] | 2319 netdev->dev_addr[1] << 8 | 2320 netdev->dev_addr[2] << 16 | 2321 netdev->dev_addr[3] << 24; 2322 addr_hi = netdev->dev_addr[4] | 2323 netdev->dev_addr[5] << 8; 2324 2325 ret = lan78xx_write_reg(dev, RX_ADDRL, addr_lo); 2326 ret = lan78xx_write_reg(dev, RX_ADDRH, addr_hi); 2327 2328 return 0; 2329 } 2330 2331 /* Enable or disable Rx checksum offload engine */ 2332 static int lan78xx_set_features(struct net_device *netdev, 2333 netdev_features_t features) 2334 { 2335 struct lan78xx_net *dev = netdev_priv(netdev); 2336 struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); 2337 unsigned long flags; 2338 int ret; 2339 2340 spin_lock_irqsave(&pdata->rfe_ctl_lock, flags); 2341 2342 if (features & NETIF_F_RXCSUM) { 2343 pdata->rfe_ctl |= RFE_CTL_TCPUDP_COE_ | RFE_CTL_IP_COE_; 2344 pdata->rfe_ctl |= RFE_CTL_ICMP_COE_ | RFE_CTL_IGMP_COE_; 2345 } else { 2346 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_COE_ | RFE_CTL_IP_COE_); 2347 pdata->rfe_ctl &= ~(RFE_CTL_ICMP_COE_ | RFE_CTL_IGMP_COE_); 2348 } 2349 2350 if (features & NETIF_F_HW_VLAN_CTAG_RX) 2351 pdata->rfe_ctl |= RFE_CTL_VLAN_STRIP_; 2352 else 2353 pdata->rfe_ctl &= ~RFE_CTL_VLAN_STRIP_; 2354 2355 if (features & NETIF_F_HW_VLAN_CTAG_FILTER) 2356 pdata->rfe_ctl |= RFE_CTL_VLAN_FILTER_; 2357 else 2358 pdata->rfe_ctl &= ~RFE_CTL_VLAN_FILTER_; 2359 2360 spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags); 2361 2362 ret = lan78xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); 2363 2364 return 0; 2365 } 2366 2367 static void lan78xx_deferred_vlan_write(struct work_struct *param) 2368 { 2369 struct lan78xx_priv *pdata = 2370 container_of(param, struct lan78xx_priv, set_vlan); 2371 struct lan78xx_net *dev = pdata->dev; 2372 2373 lan78xx_dataport_write(dev, DP_SEL_RSEL_VLAN_DA_, 0, 2374 DP_SEL_VHF_VLAN_LEN, pdata->vlan_table); 2375 } 2376 2377 static int lan78xx_vlan_rx_add_vid(struct net_device *netdev, 2378 __be16 proto, u16 vid) 2379 { 2380 struct lan78xx_net *dev = netdev_priv(netdev); 2381 struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); 2382 u16 vid_bit_index; 2383 u16 vid_dword_index; 2384 2385 vid_dword_index = (vid >> 5) & 0x7F; 2386 vid_bit_index = vid & 0x1F; 2387 2388 pdata->vlan_table[vid_dword_index] |= (1 << vid_bit_index); 2389 2390 /* defer register writes to a sleepable context */ 2391 schedule_work(&pdata->set_vlan); 2392 2393 return 0; 2394 } 2395 2396 static int lan78xx_vlan_rx_kill_vid(struct net_device *netdev, 2397 __be16 proto, u16 vid) 2398 { 2399 struct lan78xx_net *dev = netdev_priv(netdev); 2400 struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); 2401 u16 vid_bit_index; 2402 u16 vid_dword_index; 2403 2404 vid_dword_index = (vid >> 5) & 0x7F; 2405 vid_bit_index = vid & 0x1F; 2406 2407 pdata->vlan_table[vid_dword_index] &= ~(1 << vid_bit_index); 2408 2409 /* defer register writes to a sleepable context */ 2410 schedule_work(&pdata->set_vlan); 2411 2412 return 0; 2413 } 2414 2415 static void lan78xx_init_ltm(struct lan78xx_net *dev) 2416 { 2417 int ret; 2418 u32 buf; 2419 u32 regs[6] = { 0 }; 2420 2421 ret = lan78xx_read_reg(dev, USB_CFG1, &buf); 2422 if (buf & USB_CFG1_LTM_ENABLE_) { 2423 u8 temp[2]; 2424 /* Get values from EEPROM first */ 2425 if (lan78xx_read_eeprom(dev, 0x3F, 2, temp) == 0) { 2426 if (temp[0] == 24) { 2427 ret = lan78xx_read_raw_eeprom(dev, 2428 temp[1] * 2, 2429 24, 2430 (u8 *)regs); 2431 if (ret < 0) 2432 return; 2433 } 2434 } else if (lan78xx_read_otp(dev, 0x3F, 2, temp) == 0) { 2435 if (temp[0] == 24) { 2436 ret = lan78xx_read_raw_otp(dev, 2437 temp[1] * 2, 2438 24, 2439 (u8 *)regs); 2440 if (ret < 0) 2441 return; 2442 } 2443 } 2444 } 2445 2446 lan78xx_write_reg(dev, LTM_BELT_IDLE0, regs[0]); 2447 lan78xx_write_reg(dev, LTM_BELT_IDLE1, regs[1]); 2448 lan78xx_write_reg(dev, LTM_BELT_ACT0, regs[2]); 2449 lan78xx_write_reg(dev, LTM_BELT_ACT1, regs[3]); 2450 lan78xx_write_reg(dev, LTM_INACTIVE0, regs[4]); 2451 lan78xx_write_reg(dev, LTM_INACTIVE1, regs[5]); 2452 } 2453 2454 static int lan78xx_reset(struct lan78xx_net *dev) 2455 { 2456 struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); 2457 u32 buf; 2458 int ret = 0; 2459 unsigned long timeout; 2460 u8 sig; 2461 2462 ret = lan78xx_read_reg(dev, HW_CFG, &buf); 2463 buf |= HW_CFG_LRST_; 2464 ret = lan78xx_write_reg(dev, HW_CFG, buf); 2465 2466 timeout = jiffies + HZ; 2467 do { 2468 mdelay(1); 2469 ret = lan78xx_read_reg(dev, HW_CFG, &buf); 2470 if (time_after(jiffies, timeout)) { 2471 netdev_warn(dev->net, 2472 "timeout on completion of LiteReset"); 2473 return -EIO; 2474 } 2475 } while (buf & HW_CFG_LRST_); 2476 2477 lan78xx_init_mac_address(dev); 2478 2479 /* save DEVID for later usage */ 2480 ret = lan78xx_read_reg(dev, ID_REV, &buf); 2481 dev->chipid = (buf & ID_REV_CHIP_ID_MASK_) >> 16; 2482 dev->chiprev = buf & ID_REV_CHIP_REV_MASK_; 2483 2484 /* Respond to the IN token with a NAK */ 2485 ret = lan78xx_read_reg(dev, USB_CFG0, &buf); 2486 buf |= USB_CFG_BIR_; 2487 ret = lan78xx_write_reg(dev, USB_CFG0, buf); 2488 2489 /* Init LTM */ 2490 lan78xx_init_ltm(dev); 2491 2492 if (dev->udev->speed == USB_SPEED_SUPER) { 2493 buf = DEFAULT_BURST_CAP_SIZE / SS_USB_PKT_SIZE; 2494 dev->rx_urb_size = DEFAULT_BURST_CAP_SIZE; 2495 dev->rx_qlen = 4; 2496 dev->tx_qlen = 4; 2497 } else if (dev->udev->speed == USB_SPEED_HIGH) { 2498 buf = DEFAULT_BURST_CAP_SIZE / HS_USB_PKT_SIZE; 2499 dev->rx_urb_size = DEFAULT_BURST_CAP_SIZE; 2500 dev->rx_qlen = RX_MAX_QUEUE_MEMORY / dev->rx_urb_size; 2501 dev->tx_qlen = RX_MAX_QUEUE_MEMORY / dev->hard_mtu; 2502 } else { 2503 buf = DEFAULT_BURST_CAP_SIZE / FS_USB_PKT_SIZE; 2504 dev->rx_urb_size = DEFAULT_BURST_CAP_SIZE; 2505 dev->rx_qlen = 4; 2506 dev->tx_qlen = 4; 2507 } 2508 2509 ret = lan78xx_write_reg(dev, BURST_CAP, buf); 2510 ret = lan78xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY); 2511 2512 ret = lan78xx_read_reg(dev, HW_CFG, &buf); 2513 buf |= HW_CFG_MEF_; 2514 ret = lan78xx_write_reg(dev, HW_CFG, buf); 2515 2516 ret = lan78xx_read_reg(dev, USB_CFG0, &buf); 2517 buf |= USB_CFG_BCE_; 2518 ret = lan78xx_write_reg(dev, USB_CFG0, buf); 2519 2520 /* set FIFO sizes */ 2521 buf = (MAX_RX_FIFO_SIZE - 512) / 512; 2522 ret = lan78xx_write_reg(dev, FCT_RX_FIFO_END, buf); 2523 2524 buf = (MAX_TX_FIFO_SIZE - 512) / 512; 2525 ret = lan78xx_write_reg(dev, FCT_TX_FIFO_END, buf); 2526 2527 ret = lan78xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_); 2528 ret = lan78xx_write_reg(dev, FLOW, 0); 2529 ret = lan78xx_write_reg(dev, FCT_FLOW, 0); 2530 2531 /* Don't need rfe_ctl_lock during initialisation */ 2532 ret = lan78xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl); 2533 pdata->rfe_ctl |= RFE_CTL_BCAST_EN_ | RFE_CTL_DA_PERFECT_; 2534 ret = lan78xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl); 2535 2536 /* Enable or disable checksum offload engines */ 2537 lan78xx_set_features(dev->net, dev->net->features); 2538 2539 lan78xx_set_multicast(dev->net); 2540 2541 /* reset PHY */ 2542 ret = lan78xx_read_reg(dev, PMT_CTL, &buf); 2543 buf |= PMT_CTL_PHY_RST_; 2544 ret = lan78xx_write_reg(dev, PMT_CTL, buf); 2545 2546 timeout = jiffies + HZ; 2547 do { 2548 mdelay(1); 2549 ret = lan78xx_read_reg(dev, PMT_CTL, &buf); 2550 if (time_after(jiffies, timeout)) { 2551 netdev_warn(dev->net, "timeout waiting for PHY Reset"); 2552 return -EIO; 2553 } 2554 } while ((buf & PMT_CTL_PHY_RST_) || !(buf & PMT_CTL_READY_)); 2555 2556 ret = lan78xx_read_reg(dev, MAC_CR, &buf); 2557 /* LAN7801 only has RGMII mode */ 2558 if (dev->chipid == ID_REV_CHIP_ID_7801_) 2559 buf &= ~MAC_CR_GMII_EN_; 2560 2561 if (dev->chipid == ID_REV_CHIP_ID_7800_) { 2562 ret = lan78xx_read_raw_eeprom(dev, 0, 1, &sig); 2563 if (!ret && sig != EEPROM_INDICATOR) { 2564 /* Implies there is no external eeprom. Set mac speed */ 2565 netdev_info(dev->net, "No External EEPROM. Setting MAC Speed\n"); 2566 buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_; 2567 } 2568 } 2569 ret = lan78xx_write_reg(dev, MAC_CR, buf); 2570 2571 ret = lan78xx_read_reg(dev, MAC_TX, &buf); 2572 buf |= MAC_TX_TXEN_; 2573 ret = lan78xx_write_reg(dev, MAC_TX, buf); 2574 2575 ret = lan78xx_read_reg(dev, FCT_TX_CTL, &buf); 2576 buf |= FCT_TX_CTL_EN_; 2577 ret = lan78xx_write_reg(dev, FCT_TX_CTL, buf); 2578 2579 ret = lan78xx_set_rx_max_frame_length(dev, 2580 dev->net->mtu + VLAN_ETH_HLEN); 2581 2582 ret = lan78xx_read_reg(dev, MAC_RX, &buf); 2583 buf |= MAC_RX_RXEN_; 2584 ret = lan78xx_write_reg(dev, MAC_RX, buf); 2585 2586 ret = lan78xx_read_reg(dev, FCT_RX_CTL, &buf); 2587 buf |= FCT_RX_CTL_EN_; 2588 ret = lan78xx_write_reg(dev, FCT_RX_CTL, buf); 2589 2590 return 0; 2591 } 2592 2593 static void lan78xx_init_stats(struct lan78xx_net *dev) 2594 { 2595 u32 *p; 2596 int i; 2597 2598 /* initialize for stats update 2599 * some counters are 20bits and some are 32bits 2600 */ 2601 p = (u32 *)&dev->stats.rollover_max; 2602 for (i = 0; i < (sizeof(dev->stats.rollover_max) / (sizeof(u32))); i++) 2603 p[i] = 0xFFFFF; 2604 2605 dev->stats.rollover_max.rx_unicast_byte_count = 0xFFFFFFFF; 2606 dev->stats.rollover_max.rx_broadcast_byte_count = 0xFFFFFFFF; 2607 dev->stats.rollover_max.rx_multicast_byte_count = 0xFFFFFFFF; 2608 dev->stats.rollover_max.eee_rx_lpi_transitions = 0xFFFFFFFF; 2609 dev->stats.rollover_max.eee_rx_lpi_time = 0xFFFFFFFF; 2610 dev->stats.rollover_max.tx_unicast_byte_count = 0xFFFFFFFF; 2611 dev->stats.rollover_max.tx_broadcast_byte_count = 0xFFFFFFFF; 2612 dev->stats.rollover_max.tx_multicast_byte_count = 0xFFFFFFFF; 2613 dev->stats.rollover_max.eee_tx_lpi_transitions = 0xFFFFFFFF; 2614 dev->stats.rollover_max.eee_tx_lpi_time = 0xFFFFFFFF; 2615 2616 set_bit(EVENT_STAT_UPDATE, &dev->flags); 2617 } 2618 2619 static int lan78xx_open(struct net_device *net) 2620 { 2621 struct lan78xx_net *dev = netdev_priv(net); 2622 int ret; 2623 2624 ret = usb_autopm_get_interface(dev->intf); 2625 if (ret < 0) 2626 goto out; 2627 2628 phy_start(net->phydev); 2629 2630 netif_dbg(dev, ifup, dev->net, "phy initialised successfully"); 2631 2632 /* for Link Check */ 2633 if (dev->urb_intr) { 2634 ret = usb_submit_urb(dev->urb_intr, GFP_KERNEL); 2635 if (ret < 0) { 2636 netif_err(dev, ifup, dev->net, 2637 "intr submit %d\n", ret); 2638 goto done; 2639 } 2640 } 2641 2642 lan78xx_init_stats(dev); 2643 2644 set_bit(EVENT_DEV_OPEN, &dev->flags); 2645 2646 netif_start_queue(net); 2647 2648 dev->link_on = false; 2649 2650 lan78xx_defer_kevent(dev, EVENT_LINK_RESET); 2651 done: 2652 usb_autopm_put_interface(dev->intf); 2653 2654 out: 2655 return ret; 2656 } 2657 2658 static void lan78xx_terminate_urbs(struct lan78xx_net *dev) 2659 { 2660 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(unlink_wakeup); 2661 DECLARE_WAITQUEUE(wait, current); 2662 int temp; 2663 2664 /* ensure there are no more active urbs */ 2665 add_wait_queue(&unlink_wakeup, &wait); 2666 set_current_state(TASK_UNINTERRUPTIBLE); 2667 dev->wait = &unlink_wakeup; 2668 temp = unlink_urbs(dev, &dev->txq) + unlink_urbs(dev, &dev->rxq); 2669 2670 /* maybe wait for deletions to finish. */ 2671 while (!skb_queue_empty(&dev->rxq) && 2672 !skb_queue_empty(&dev->txq) && 2673 !skb_queue_empty(&dev->done)) { 2674 schedule_timeout(msecs_to_jiffies(UNLINK_TIMEOUT_MS)); 2675 set_current_state(TASK_UNINTERRUPTIBLE); 2676 netif_dbg(dev, ifdown, dev->net, 2677 "waited for %d urb completions\n", temp); 2678 } 2679 set_current_state(TASK_RUNNING); 2680 dev->wait = NULL; 2681 remove_wait_queue(&unlink_wakeup, &wait); 2682 } 2683 2684 static int lan78xx_stop(struct net_device *net) 2685 { 2686 struct lan78xx_net *dev = netdev_priv(net); 2687 2688 if (timer_pending(&dev->stat_monitor)) 2689 del_timer_sync(&dev->stat_monitor); 2690 2691 if (net->phydev) 2692 phy_stop(net->phydev); 2693 2694 clear_bit(EVENT_DEV_OPEN, &dev->flags); 2695 netif_stop_queue(net); 2696 2697 netif_info(dev, ifdown, dev->net, 2698 "stop stats: rx/tx %lu/%lu, errs %lu/%lu\n", 2699 net->stats.rx_packets, net->stats.tx_packets, 2700 net->stats.rx_errors, net->stats.tx_errors); 2701 2702 lan78xx_terminate_urbs(dev); 2703 2704 usb_kill_urb(dev->urb_intr); 2705 2706 skb_queue_purge(&dev->rxq_pause); 2707 2708 /* deferred work (task, timer, softirq) must also stop. 2709 * can't flush_scheduled_work() until we drop rtnl (later), 2710 * else workers could deadlock; so make workers a NOP. 2711 */ 2712 dev->flags = 0; 2713 cancel_delayed_work_sync(&dev->wq); 2714 tasklet_kill(&dev->bh); 2715 2716 usb_autopm_put_interface(dev->intf); 2717 2718 return 0; 2719 } 2720 2721 static int lan78xx_linearize(struct sk_buff *skb) 2722 { 2723 return skb_linearize(skb); 2724 } 2725 2726 static struct sk_buff *lan78xx_tx_prep(struct lan78xx_net *dev, 2727 struct sk_buff *skb, gfp_t flags) 2728 { 2729 u32 tx_cmd_a, tx_cmd_b; 2730 2731 if (skb_cow_head(skb, TX_OVERHEAD)) { 2732 dev_kfree_skb_any(skb); 2733 return NULL; 2734 } 2735 2736 if (lan78xx_linearize(skb) < 0) 2737 return NULL; 2738 2739 tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN_MASK_) | TX_CMD_A_FCS_; 2740 2741 if (skb->ip_summed == CHECKSUM_PARTIAL) 2742 tx_cmd_a |= TX_CMD_A_IPE_ | TX_CMD_A_TPE_; 2743 2744 tx_cmd_b = 0; 2745 if (skb_is_gso(skb)) { 2746 u16 mss = max(skb_shinfo(skb)->gso_size, TX_CMD_B_MSS_MIN_); 2747 2748 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT_) & TX_CMD_B_MSS_MASK_; 2749 2750 tx_cmd_a |= TX_CMD_A_LSO_; 2751 } 2752 2753 if (skb_vlan_tag_present(skb)) { 2754 tx_cmd_a |= TX_CMD_A_IVTG_; 2755 tx_cmd_b |= skb_vlan_tag_get(skb) & TX_CMD_B_VTAG_MASK_; 2756 } 2757 2758 skb_push(skb, 4); 2759 cpu_to_le32s(&tx_cmd_b); 2760 memcpy(skb->data, &tx_cmd_b, 4); 2761 2762 skb_push(skb, 4); 2763 cpu_to_le32s(&tx_cmd_a); 2764 memcpy(skb->data, &tx_cmd_a, 4); 2765 2766 return skb; 2767 } 2768 2769 static enum skb_state defer_bh(struct lan78xx_net *dev, struct sk_buff *skb, 2770 struct sk_buff_head *list, enum skb_state state) 2771 { 2772 unsigned long flags; 2773 enum skb_state old_state; 2774 struct skb_data *entry = (struct skb_data *)skb->cb; 2775 2776 spin_lock_irqsave(&list->lock, flags); 2777 old_state = entry->state; 2778 entry->state = state; 2779 2780 __skb_unlink(skb, list); 2781 spin_unlock(&list->lock); 2782 spin_lock(&dev->done.lock); 2783 2784 __skb_queue_tail(&dev->done, skb); 2785 if (skb_queue_len(&dev->done) == 1) 2786 tasklet_schedule(&dev->bh); 2787 spin_unlock_irqrestore(&dev->done.lock, flags); 2788 2789 return old_state; 2790 } 2791 2792 static void tx_complete(struct urb *urb) 2793 { 2794 struct sk_buff *skb = (struct sk_buff *)urb->context; 2795 struct skb_data *entry = (struct skb_data *)skb->cb; 2796 struct lan78xx_net *dev = entry->dev; 2797 2798 if (urb->status == 0) { 2799 dev->net->stats.tx_packets += entry->num_of_packet; 2800 dev->net->stats.tx_bytes += entry->length; 2801 } else { 2802 dev->net->stats.tx_errors++; 2803 2804 switch (urb->status) { 2805 case -EPIPE: 2806 lan78xx_defer_kevent(dev, EVENT_TX_HALT); 2807 break; 2808 2809 /* software-driven interface shutdown */ 2810 case -ECONNRESET: 2811 case -ESHUTDOWN: 2812 break; 2813 2814 case -EPROTO: 2815 case -ETIME: 2816 case -EILSEQ: 2817 netif_stop_queue(dev->net); 2818 break; 2819 default: 2820 netif_dbg(dev, tx_err, dev->net, 2821 "tx err %d\n", entry->urb->status); 2822 break; 2823 } 2824 } 2825 2826 usb_autopm_put_interface_async(dev->intf); 2827 2828 defer_bh(dev, skb, &dev->txq, tx_done); 2829 } 2830 2831 static void lan78xx_queue_skb(struct sk_buff_head *list, 2832 struct sk_buff *newsk, enum skb_state state) 2833 { 2834 struct skb_data *entry = (struct skb_data *)newsk->cb; 2835 2836 __skb_queue_tail(list, newsk); 2837 entry->state = state; 2838 } 2839 2840 static netdev_tx_t 2841 lan78xx_start_xmit(struct sk_buff *skb, struct net_device *net) 2842 { 2843 struct lan78xx_net *dev = netdev_priv(net); 2844 struct sk_buff *skb2 = NULL; 2845 2846 if (skb) { 2847 skb_tx_timestamp(skb); 2848 skb2 = lan78xx_tx_prep(dev, skb, GFP_ATOMIC); 2849 } 2850 2851 if (skb2) { 2852 skb_queue_tail(&dev->txq_pend, skb2); 2853 2854 /* throttle TX patch at slower than SUPER SPEED USB */ 2855 if ((dev->udev->speed < USB_SPEED_SUPER) && 2856 (skb_queue_len(&dev->txq_pend) > 10)) 2857 netif_stop_queue(net); 2858 } else { 2859 netif_dbg(dev, tx_err, dev->net, 2860 "lan78xx_tx_prep return NULL\n"); 2861 dev->net->stats.tx_errors++; 2862 dev->net->stats.tx_dropped++; 2863 } 2864 2865 tasklet_schedule(&dev->bh); 2866 2867 return NETDEV_TX_OK; 2868 } 2869 2870 static int 2871 lan78xx_get_endpoints(struct lan78xx_net *dev, struct usb_interface *intf) 2872 { 2873 int tmp; 2874 struct usb_host_interface *alt = NULL; 2875 struct usb_host_endpoint *in = NULL, *out = NULL; 2876 struct usb_host_endpoint *status = NULL; 2877 2878 for (tmp = 0; tmp < intf->num_altsetting; tmp++) { 2879 unsigned ep; 2880 2881 in = NULL; 2882 out = NULL; 2883 status = NULL; 2884 alt = intf->altsetting + tmp; 2885 2886 for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) { 2887 struct usb_host_endpoint *e; 2888 int intr = 0; 2889 2890 e = alt->endpoint + ep; 2891 switch (e->desc.bmAttributes) { 2892 case USB_ENDPOINT_XFER_INT: 2893 if (!usb_endpoint_dir_in(&e->desc)) 2894 continue; 2895 intr = 1; 2896 /* FALLTHROUGH */ 2897 case USB_ENDPOINT_XFER_BULK: 2898 break; 2899 default: 2900 continue; 2901 } 2902 if (usb_endpoint_dir_in(&e->desc)) { 2903 if (!intr && !in) 2904 in = e; 2905 else if (intr && !status) 2906 status = e; 2907 } else { 2908 if (!out) 2909 out = e; 2910 } 2911 } 2912 if (in && out) 2913 break; 2914 } 2915 if (!alt || !in || !out) 2916 return -EINVAL; 2917 2918 dev->pipe_in = usb_rcvbulkpipe(dev->udev, 2919 in->desc.bEndpointAddress & 2920 USB_ENDPOINT_NUMBER_MASK); 2921 dev->pipe_out = usb_sndbulkpipe(dev->udev, 2922 out->desc.bEndpointAddress & 2923 USB_ENDPOINT_NUMBER_MASK); 2924 dev->ep_intr = status; 2925 2926 return 0; 2927 } 2928 2929 static int lan78xx_bind(struct lan78xx_net *dev, struct usb_interface *intf) 2930 { 2931 struct lan78xx_priv *pdata = NULL; 2932 int ret; 2933 int i; 2934 2935 ret = lan78xx_get_endpoints(dev, intf); 2936 if (ret) { 2937 netdev_warn(dev->net, "lan78xx_get_endpoints failed: %d\n", 2938 ret); 2939 return ret; 2940 } 2941 2942 dev->data[0] = (unsigned long)kzalloc(sizeof(*pdata), GFP_KERNEL); 2943 2944 pdata = (struct lan78xx_priv *)(dev->data[0]); 2945 if (!pdata) { 2946 netdev_warn(dev->net, "Unable to allocate lan78xx_priv"); 2947 return -ENOMEM; 2948 } 2949 2950 pdata->dev = dev; 2951 2952 spin_lock_init(&pdata->rfe_ctl_lock); 2953 mutex_init(&pdata->dataport_mutex); 2954 2955 INIT_WORK(&pdata->set_multicast, lan78xx_deferred_multicast_write); 2956 2957 for (i = 0; i < DP_SEL_VHF_VLAN_LEN; i++) 2958 pdata->vlan_table[i] = 0; 2959 2960 INIT_WORK(&pdata->set_vlan, lan78xx_deferred_vlan_write); 2961 2962 dev->net->features = 0; 2963 2964 if (DEFAULT_TX_CSUM_ENABLE) 2965 dev->net->features |= NETIF_F_HW_CSUM; 2966 2967 if (DEFAULT_RX_CSUM_ENABLE) 2968 dev->net->features |= NETIF_F_RXCSUM; 2969 2970 if (DEFAULT_TSO_CSUM_ENABLE) 2971 dev->net->features |= NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_SG; 2972 2973 if (DEFAULT_VLAN_RX_OFFLOAD) 2974 dev->net->features |= NETIF_F_HW_VLAN_CTAG_RX; 2975 2976 if (DEFAULT_VLAN_FILTER_ENABLE) 2977 dev->net->features |= NETIF_F_HW_VLAN_CTAG_FILTER; 2978 2979 dev->net->hw_features = dev->net->features; 2980 2981 ret = lan78xx_setup_irq_domain(dev); 2982 if (ret < 0) { 2983 netdev_warn(dev->net, 2984 "lan78xx_setup_irq_domain() failed : %d", ret); 2985 goto out1; 2986 } 2987 2988 dev->net->hard_header_len += TX_OVERHEAD; 2989 dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; 2990 2991 /* Init all registers */ 2992 ret = lan78xx_reset(dev); 2993 if (ret) { 2994 netdev_warn(dev->net, "Registers INIT FAILED...."); 2995 goto out2; 2996 } 2997 2998 ret = lan78xx_mdio_init(dev); 2999 if (ret) { 3000 netdev_warn(dev->net, "MDIO INIT FAILED....."); 3001 goto out2; 3002 } 3003 3004 dev->net->flags |= IFF_MULTICAST; 3005 3006 pdata->wol = WAKE_MAGIC; 3007 3008 return ret; 3009 3010 out2: 3011 lan78xx_remove_irq_domain(dev); 3012 3013 out1: 3014 netdev_warn(dev->net, "Bind routine FAILED"); 3015 cancel_work_sync(&pdata->set_multicast); 3016 cancel_work_sync(&pdata->set_vlan); 3017 kfree(pdata); 3018 return ret; 3019 } 3020 3021 static void lan78xx_unbind(struct lan78xx_net *dev, struct usb_interface *intf) 3022 { 3023 struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); 3024 3025 lan78xx_remove_irq_domain(dev); 3026 3027 lan78xx_remove_mdio(dev); 3028 3029 if (pdata) { 3030 cancel_work_sync(&pdata->set_multicast); 3031 cancel_work_sync(&pdata->set_vlan); 3032 netif_dbg(dev, ifdown, dev->net, "free pdata"); 3033 kfree(pdata); 3034 pdata = NULL; 3035 dev->data[0] = 0; 3036 } 3037 } 3038 3039 static void lan78xx_rx_csum_offload(struct lan78xx_net *dev, 3040 struct sk_buff *skb, 3041 u32 rx_cmd_a, u32 rx_cmd_b) 3042 { 3043 /* HW Checksum offload appears to be flawed if used when not stripping 3044 * VLAN headers. Drop back to S/W checksums under these conditions. 3045 */ 3046 if (!(dev->net->features & NETIF_F_RXCSUM) || 3047 unlikely(rx_cmd_a & RX_CMD_A_ICSM_) || 3048 ((rx_cmd_a & RX_CMD_A_FVTG_) && 3049 !(dev->net->features & NETIF_F_HW_VLAN_CTAG_RX))) { 3050 skb->ip_summed = CHECKSUM_NONE; 3051 } else { 3052 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT_)); 3053 skb->ip_summed = CHECKSUM_COMPLETE; 3054 } 3055 } 3056 3057 static void lan78xx_rx_vlan_offload(struct lan78xx_net *dev, 3058 struct sk_buff *skb, 3059 u32 rx_cmd_a, u32 rx_cmd_b) 3060 { 3061 if ((dev->net->features & NETIF_F_HW_VLAN_CTAG_RX) && 3062 (rx_cmd_a & RX_CMD_A_FVTG_)) 3063 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 3064 (rx_cmd_b & 0xffff)); 3065 } 3066 3067 static void lan78xx_skb_return(struct lan78xx_net *dev, struct sk_buff *skb) 3068 { 3069 int status; 3070 3071 if (test_bit(EVENT_RX_PAUSED, &dev->flags)) { 3072 skb_queue_tail(&dev->rxq_pause, skb); 3073 return; 3074 } 3075 3076 dev->net->stats.rx_packets++; 3077 dev->net->stats.rx_bytes += skb->len; 3078 3079 skb->protocol = eth_type_trans(skb, dev->net); 3080 3081 netif_dbg(dev, rx_status, dev->net, "< rx, len %zu, type 0x%x\n", 3082 skb->len + sizeof(struct ethhdr), skb->protocol); 3083 memset(skb->cb, 0, sizeof(struct skb_data)); 3084 3085 if (skb_defer_rx_timestamp(skb)) 3086 return; 3087 3088 status = netif_rx(skb); 3089 if (status != NET_RX_SUCCESS) 3090 netif_dbg(dev, rx_err, dev->net, 3091 "netif_rx status %d\n", status); 3092 } 3093 3094 static int lan78xx_rx(struct lan78xx_net *dev, struct sk_buff *skb) 3095 { 3096 if (skb->len < dev->net->hard_header_len) 3097 return 0; 3098 3099 while (skb->len > 0) { 3100 u32 rx_cmd_a, rx_cmd_b, align_count, size; 3101 u16 rx_cmd_c; 3102 struct sk_buff *skb2; 3103 unsigned char *packet; 3104 3105 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a)); 3106 le32_to_cpus(&rx_cmd_a); 3107 skb_pull(skb, sizeof(rx_cmd_a)); 3108 3109 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b)); 3110 le32_to_cpus(&rx_cmd_b); 3111 skb_pull(skb, sizeof(rx_cmd_b)); 3112 3113 memcpy(&rx_cmd_c, skb->data, sizeof(rx_cmd_c)); 3114 le16_to_cpus(&rx_cmd_c); 3115 skb_pull(skb, sizeof(rx_cmd_c)); 3116 3117 packet = skb->data; 3118 3119 /* get the packet length */ 3120 size = (rx_cmd_a & RX_CMD_A_LEN_MASK_); 3121 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4; 3122 3123 if (unlikely(rx_cmd_a & RX_CMD_A_RED_)) { 3124 netif_dbg(dev, rx_err, dev->net, 3125 "Error rx_cmd_a=0x%08x", rx_cmd_a); 3126 } else { 3127 /* last frame in this batch */ 3128 if (skb->len == size) { 3129 lan78xx_rx_csum_offload(dev, skb, 3130 rx_cmd_a, rx_cmd_b); 3131 lan78xx_rx_vlan_offload(dev, skb, 3132 rx_cmd_a, rx_cmd_b); 3133 3134 skb_trim(skb, skb->len - 4); /* remove fcs */ 3135 skb->truesize = size + sizeof(struct sk_buff); 3136 3137 return 1; 3138 } 3139 3140 skb2 = skb_clone(skb, GFP_ATOMIC); 3141 if (unlikely(!skb2)) { 3142 netdev_warn(dev->net, "Error allocating skb"); 3143 return 0; 3144 } 3145 3146 skb2->len = size; 3147 skb2->data = packet; 3148 skb_set_tail_pointer(skb2, size); 3149 3150 lan78xx_rx_csum_offload(dev, skb2, rx_cmd_a, rx_cmd_b); 3151 lan78xx_rx_vlan_offload(dev, skb2, rx_cmd_a, rx_cmd_b); 3152 3153 skb_trim(skb2, skb2->len - 4); /* remove fcs */ 3154 skb2->truesize = size + sizeof(struct sk_buff); 3155 3156 lan78xx_skb_return(dev, skb2); 3157 } 3158 3159 skb_pull(skb, size); 3160 3161 /* padding bytes before the next frame starts */ 3162 if (skb->len) 3163 skb_pull(skb, align_count); 3164 } 3165 3166 return 1; 3167 } 3168 3169 static inline void rx_process(struct lan78xx_net *dev, struct sk_buff *skb) 3170 { 3171 if (!lan78xx_rx(dev, skb)) { 3172 dev->net->stats.rx_errors++; 3173 goto done; 3174 } 3175 3176 if (skb->len) { 3177 lan78xx_skb_return(dev, skb); 3178 return; 3179 } 3180 3181 netif_dbg(dev, rx_err, dev->net, "drop\n"); 3182 dev->net->stats.rx_errors++; 3183 done: 3184 skb_queue_tail(&dev->done, skb); 3185 } 3186 3187 static void rx_complete(struct urb *urb); 3188 3189 static int rx_submit(struct lan78xx_net *dev, struct urb *urb, gfp_t flags) 3190 { 3191 struct sk_buff *skb; 3192 struct skb_data *entry; 3193 unsigned long lockflags; 3194 size_t size = dev->rx_urb_size; 3195 int ret = 0; 3196 3197 skb = netdev_alloc_skb_ip_align(dev->net, size); 3198 if (!skb) { 3199 usb_free_urb(urb); 3200 return -ENOMEM; 3201 } 3202 3203 entry = (struct skb_data *)skb->cb; 3204 entry->urb = urb; 3205 entry->dev = dev; 3206 entry->length = 0; 3207 3208 usb_fill_bulk_urb(urb, dev->udev, dev->pipe_in, 3209 skb->data, size, rx_complete, skb); 3210 3211 spin_lock_irqsave(&dev->rxq.lock, lockflags); 3212 3213 if (netif_device_present(dev->net) && 3214 netif_running(dev->net) && 3215 !test_bit(EVENT_RX_HALT, &dev->flags) && 3216 !test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { 3217 ret = usb_submit_urb(urb, GFP_ATOMIC); 3218 switch (ret) { 3219 case 0: 3220 lan78xx_queue_skb(&dev->rxq, skb, rx_start); 3221 break; 3222 case -EPIPE: 3223 lan78xx_defer_kevent(dev, EVENT_RX_HALT); 3224 break; 3225 case -ENODEV: 3226 netif_dbg(dev, ifdown, dev->net, "device gone\n"); 3227 netif_device_detach(dev->net); 3228 break; 3229 case -EHOSTUNREACH: 3230 ret = -ENOLINK; 3231 break; 3232 default: 3233 netif_dbg(dev, rx_err, dev->net, 3234 "rx submit, %d\n", ret); 3235 tasklet_schedule(&dev->bh); 3236 } 3237 } else { 3238 netif_dbg(dev, ifdown, dev->net, "rx: stopped\n"); 3239 ret = -ENOLINK; 3240 } 3241 spin_unlock_irqrestore(&dev->rxq.lock, lockflags); 3242 if (ret) { 3243 dev_kfree_skb_any(skb); 3244 usb_free_urb(urb); 3245 } 3246 return ret; 3247 } 3248 3249 static void rx_complete(struct urb *urb) 3250 { 3251 struct sk_buff *skb = (struct sk_buff *)urb->context; 3252 struct skb_data *entry = (struct skb_data *)skb->cb; 3253 struct lan78xx_net *dev = entry->dev; 3254 int urb_status = urb->status; 3255 enum skb_state state; 3256 3257 skb_put(skb, urb->actual_length); 3258 state = rx_done; 3259 entry->urb = NULL; 3260 3261 switch (urb_status) { 3262 case 0: 3263 if (skb->len < dev->net->hard_header_len) { 3264 state = rx_cleanup; 3265 dev->net->stats.rx_errors++; 3266 dev->net->stats.rx_length_errors++; 3267 netif_dbg(dev, rx_err, dev->net, 3268 "rx length %d\n", skb->len); 3269 } 3270 usb_mark_last_busy(dev->udev); 3271 break; 3272 case -EPIPE: 3273 dev->net->stats.rx_errors++; 3274 lan78xx_defer_kevent(dev, EVENT_RX_HALT); 3275 /* FALLTHROUGH */ 3276 case -ECONNRESET: /* async unlink */ 3277 case -ESHUTDOWN: /* hardware gone */ 3278 netif_dbg(dev, ifdown, dev->net, 3279 "rx shutdown, code %d\n", urb_status); 3280 state = rx_cleanup; 3281 entry->urb = urb; 3282 urb = NULL; 3283 break; 3284 case -EPROTO: 3285 case -ETIME: 3286 case -EILSEQ: 3287 dev->net->stats.rx_errors++; 3288 state = rx_cleanup; 3289 entry->urb = urb; 3290 urb = NULL; 3291 break; 3292 3293 /* data overrun ... flush fifo? */ 3294 case -EOVERFLOW: 3295 dev->net->stats.rx_over_errors++; 3296 /* FALLTHROUGH */ 3297 3298 default: 3299 state = rx_cleanup; 3300 dev->net->stats.rx_errors++; 3301 netif_dbg(dev, rx_err, dev->net, "rx status %d\n", urb_status); 3302 break; 3303 } 3304 3305 state = defer_bh(dev, skb, &dev->rxq, state); 3306 3307 if (urb) { 3308 if (netif_running(dev->net) && 3309 !test_bit(EVENT_RX_HALT, &dev->flags) && 3310 state != unlink_start) { 3311 rx_submit(dev, urb, GFP_ATOMIC); 3312 return; 3313 } 3314 usb_free_urb(urb); 3315 } 3316 netif_dbg(dev, rx_err, dev->net, "no read resubmitted\n"); 3317 } 3318 3319 static void lan78xx_tx_bh(struct lan78xx_net *dev) 3320 { 3321 int length; 3322 struct urb *urb = NULL; 3323 struct skb_data *entry; 3324 unsigned long flags; 3325 struct sk_buff_head *tqp = &dev->txq_pend; 3326 struct sk_buff *skb, *skb2; 3327 int ret; 3328 int count, pos; 3329 int skb_totallen, pkt_cnt; 3330 3331 skb_totallen = 0; 3332 pkt_cnt = 0; 3333 count = 0; 3334 length = 0; 3335 spin_lock_irqsave(&tqp->lock, flags); 3336 skb_queue_walk(tqp, skb) { 3337 if (skb_is_gso(skb)) { 3338 if (!skb_queue_is_first(tqp, skb)) { 3339 /* handle previous packets first */ 3340 break; 3341 } 3342 count = 1; 3343 length = skb->len - TX_OVERHEAD; 3344 __skb_unlink(skb, tqp); 3345 spin_unlock_irqrestore(&tqp->lock, flags); 3346 goto gso_skb; 3347 } 3348 3349 if ((skb_totallen + skb->len) > MAX_SINGLE_PACKET_SIZE) 3350 break; 3351 skb_totallen = skb->len + roundup(skb_totallen, sizeof(u32)); 3352 pkt_cnt++; 3353 } 3354 spin_unlock_irqrestore(&tqp->lock, flags); 3355 3356 /* copy to a single skb */ 3357 skb = alloc_skb(skb_totallen, GFP_ATOMIC); 3358 if (!skb) 3359 goto drop; 3360 3361 skb_put(skb, skb_totallen); 3362 3363 for (count = pos = 0; count < pkt_cnt; count++) { 3364 skb2 = skb_dequeue(tqp); 3365 if (skb2) { 3366 length += (skb2->len - TX_OVERHEAD); 3367 memcpy(skb->data + pos, skb2->data, skb2->len); 3368 pos += roundup(skb2->len, sizeof(u32)); 3369 dev_kfree_skb(skb2); 3370 } 3371 } 3372 3373 gso_skb: 3374 urb = usb_alloc_urb(0, GFP_ATOMIC); 3375 if (!urb) 3376 goto drop; 3377 3378 entry = (struct skb_data *)skb->cb; 3379 entry->urb = urb; 3380 entry->dev = dev; 3381 entry->length = length; 3382 entry->num_of_packet = count; 3383 3384 spin_lock_irqsave(&dev->txq.lock, flags); 3385 ret = usb_autopm_get_interface_async(dev->intf); 3386 if (ret < 0) { 3387 spin_unlock_irqrestore(&dev->txq.lock, flags); 3388 goto drop; 3389 } 3390 3391 usb_fill_bulk_urb(urb, dev->udev, dev->pipe_out, 3392 skb->data, skb->len, tx_complete, skb); 3393 3394 if (length % dev->maxpacket == 0) { 3395 /* send USB_ZERO_PACKET */ 3396 urb->transfer_flags |= URB_ZERO_PACKET; 3397 } 3398 3399 #ifdef CONFIG_PM 3400 /* if this triggers the device is still a sleep */ 3401 if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { 3402 /* transmission will be done in resume */ 3403 usb_anchor_urb(urb, &dev->deferred); 3404 /* no use to process more packets */ 3405 netif_stop_queue(dev->net); 3406 usb_put_urb(urb); 3407 spin_unlock_irqrestore(&dev->txq.lock, flags); 3408 netdev_dbg(dev->net, "Delaying transmission for resumption\n"); 3409 return; 3410 } 3411 #endif 3412 3413 ret = usb_submit_urb(urb, GFP_ATOMIC); 3414 switch (ret) { 3415 case 0: 3416 netif_trans_update(dev->net); 3417 lan78xx_queue_skb(&dev->txq, skb, tx_start); 3418 if (skb_queue_len(&dev->txq) >= dev->tx_qlen) 3419 netif_stop_queue(dev->net); 3420 break; 3421 case -EPIPE: 3422 netif_stop_queue(dev->net); 3423 lan78xx_defer_kevent(dev, EVENT_TX_HALT); 3424 usb_autopm_put_interface_async(dev->intf); 3425 break; 3426 default: 3427 usb_autopm_put_interface_async(dev->intf); 3428 netif_dbg(dev, tx_err, dev->net, 3429 "tx: submit urb err %d\n", ret); 3430 break; 3431 } 3432 3433 spin_unlock_irqrestore(&dev->txq.lock, flags); 3434 3435 if (ret) { 3436 netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", ret); 3437 drop: 3438 dev->net->stats.tx_dropped++; 3439 if (skb) 3440 dev_kfree_skb_any(skb); 3441 usb_free_urb(urb); 3442 } else 3443 netif_dbg(dev, tx_queued, dev->net, 3444 "> tx, len %d, type 0x%x\n", length, skb->protocol); 3445 } 3446 3447 static void lan78xx_rx_bh(struct lan78xx_net *dev) 3448 { 3449 struct urb *urb; 3450 int i; 3451 3452 if (skb_queue_len(&dev->rxq) < dev->rx_qlen) { 3453 for (i = 0; i < 10; i++) { 3454 if (skb_queue_len(&dev->rxq) >= dev->rx_qlen) 3455 break; 3456 urb = usb_alloc_urb(0, GFP_ATOMIC); 3457 if (urb) 3458 if (rx_submit(dev, urb, GFP_ATOMIC) == -ENOLINK) 3459 return; 3460 } 3461 3462 if (skb_queue_len(&dev->rxq) < dev->rx_qlen) 3463 tasklet_schedule(&dev->bh); 3464 } 3465 if (skb_queue_len(&dev->txq) < dev->tx_qlen) 3466 netif_wake_queue(dev->net); 3467 } 3468 3469 static void lan78xx_bh(unsigned long param) 3470 { 3471 struct lan78xx_net *dev = (struct lan78xx_net *)param; 3472 struct sk_buff *skb; 3473 struct skb_data *entry; 3474 3475 while ((skb = skb_dequeue(&dev->done))) { 3476 entry = (struct skb_data *)(skb->cb); 3477 switch (entry->state) { 3478 case rx_done: 3479 entry->state = rx_cleanup; 3480 rx_process(dev, skb); 3481 continue; 3482 case tx_done: 3483 usb_free_urb(entry->urb); 3484 dev_kfree_skb(skb); 3485 continue; 3486 case rx_cleanup: 3487 usb_free_urb(entry->urb); 3488 dev_kfree_skb(skb); 3489 continue; 3490 default: 3491 netdev_dbg(dev->net, "skb state %d\n", entry->state); 3492 return; 3493 } 3494 } 3495 3496 if (netif_device_present(dev->net) && netif_running(dev->net)) { 3497 /* reset update timer delta */ 3498 if (timer_pending(&dev->stat_monitor) && (dev->delta != 1)) { 3499 dev->delta = 1; 3500 mod_timer(&dev->stat_monitor, 3501 jiffies + STAT_UPDATE_TIMER); 3502 } 3503 3504 if (!skb_queue_empty(&dev->txq_pend)) 3505 lan78xx_tx_bh(dev); 3506 3507 if (!timer_pending(&dev->delay) && 3508 !test_bit(EVENT_RX_HALT, &dev->flags)) 3509 lan78xx_rx_bh(dev); 3510 } 3511 } 3512 3513 static void lan78xx_delayedwork(struct work_struct *work) 3514 { 3515 int status; 3516 struct lan78xx_net *dev; 3517 3518 dev = container_of(work, struct lan78xx_net, wq.work); 3519 3520 if (test_bit(EVENT_TX_HALT, &dev->flags)) { 3521 unlink_urbs(dev, &dev->txq); 3522 status = usb_autopm_get_interface(dev->intf); 3523 if (status < 0) 3524 goto fail_pipe; 3525 status = usb_clear_halt(dev->udev, dev->pipe_out); 3526 usb_autopm_put_interface(dev->intf); 3527 if (status < 0 && 3528 status != -EPIPE && 3529 status != -ESHUTDOWN) { 3530 if (netif_msg_tx_err(dev)) 3531 fail_pipe: 3532 netdev_err(dev->net, 3533 "can't clear tx halt, status %d\n", 3534 status); 3535 } else { 3536 clear_bit(EVENT_TX_HALT, &dev->flags); 3537 if (status != -ESHUTDOWN) 3538 netif_wake_queue(dev->net); 3539 } 3540 } 3541 if (test_bit(EVENT_RX_HALT, &dev->flags)) { 3542 unlink_urbs(dev, &dev->rxq); 3543 status = usb_autopm_get_interface(dev->intf); 3544 if (status < 0) 3545 goto fail_halt; 3546 status = usb_clear_halt(dev->udev, dev->pipe_in); 3547 usb_autopm_put_interface(dev->intf); 3548 if (status < 0 && 3549 status != -EPIPE && 3550 status != -ESHUTDOWN) { 3551 if (netif_msg_rx_err(dev)) 3552 fail_halt: 3553 netdev_err(dev->net, 3554 "can't clear rx halt, status %d\n", 3555 status); 3556 } else { 3557 clear_bit(EVENT_RX_HALT, &dev->flags); 3558 tasklet_schedule(&dev->bh); 3559 } 3560 } 3561 3562 if (test_bit(EVENT_LINK_RESET, &dev->flags)) { 3563 int ret = 0; 3564 3565 clear_bit(EVENT_LINK_RESET, &dev->flags); 3566 status = usb_autopm_get_interface(dev->intf); 3567 if (status < 0) 3568 goto skip_reset; 3569 if (lan78xx_link_reset(dev) < 0) { 3570 usb_autopm_put_interface(dev->intf); 3571 skip_reset: 3572 netdev_info(dev->net, "link reset failed (%d)\n", 3573 ret); 3574 } else { 3575 usb_autopm_put_interface(dev->intf); 3576 } 3577 } 3578 3579 if (test_bit(EVENT_STAT_UPDATE, &dev->flags)) { 3580 lan78xx_update_stats(dev); 3581 3582 clear_bit(EVENT_STAT_UPDATE, &dev->flags); 3583 3584 mod_timer(&dev->stat_monitor, 3585 jiffies + (STAT_UPDATE_TIMER * dev->delta)); 3586 3587 dev->delta = min((dev->delta * 2), 50); 3588 } 3589 } 3590 3591 static void intr_complete(struct urb *urb) 3592 { 3593 struct lan78xx_net *dev = urb->context; 3594 int status = urb->status; 3595 3596 switch (status) { 3597 /* success */ 3598 case 0: 3599 lan78xx_status(dev, urb); 3600 break; 3601 3602 /* software-driven interface shutdown */ 3603 case -ENOENT: /* urb killed */ 3604 case -ESHUTDOWN: /* hardware gone */ 3605 netif_dbg(dev, ifdown, dev->net, 3606 "intr shutdown, code %d\n", status); 3607 return; 3608 3609 /* NOTE: not throttling like RX/TX, since this endpoint 3610 * already polls infrequently 3611 */ 3612 default: 3613 netdev_dbg(dev->net, "intr status %d\n", status); 3614 break; 3615 } 3616 3617 if (!netif_running(dev->net)) 3618 return; 3619 3620 memset(urb->transfer_buffer, 0, urb->transfer_buffer_length); 3621 status = usb_submit_urb(urb, GFP_ATOMIC); 3622 if (status != 0) 3623 netif_err(dev, timer, dev->net, 3624 "intr resubmit --> %d\n", status); 3625 } 3626 3627 static void lan78xx_disconnect(struct usb_interface *intf) 3628 { 3629 struct lan78xx_net *dev; 3630 struct usb_device *udev; 3631 struct net_device *net; 3632 struct phy_device *phydev; 3633 3634 dev = usb_get_intfdata(intf); 3635 usb_set_intfdata(intf, NULL); 3636 if (!dev) 3637 return; 3638 3639 udev = interface_to_usbdev(intf); 3640 net = dev->net; 3641 phydev = net->phydev; 3642 3643 phy_unregister_fixup_for_uid(PHY_KSZ9031RNX, 0xfffffff0); 3644 phy_unregister_fixup_for_uid(PHY_LAN8835, 0xfffffff0); 3645 3646 phy_disconnect(net->phydev); 3647 3648 if (phy_is_pseudo_fixed_link(phydev)) 3649 fixed_phy_unregister(phydev); 3650 3651 unregister_netdev(net); 3652 3653 cancel_delayed_work_sync(&dev->wq); 3654 3655 usb_scuttle_anchored_urbs(&dev->deferred); 3656 3657 lan78xx_unbind(dev, intf); 3658 3659 usb_kill_urb(dev->urb_intr); 3660 usb_free_urb(dev->urb_intr); 3661 3662 free_netdev(net); 3663 usb_put_dev(udev); 3664 } 3665 3666 static void lan78xx_tx_timeout(struct net_device *net) 3667 { 3668 struct lan78xx_net *dev = netdev_priv(net); 3669 3670 unlink_urbs(dev, &dev->txq); 3671 tasklet_schedule(&dev->bh); 3672 } 3673 3674 static const struct net_device_ops lan78xx_netdev_ops = { 3675 .ndo_open = lan78xx_open, 3676 .ndo_stop = lan78xx_stop, 3677 .ndo_start_xmit = lan78xx_start_xmit, 3678 .ndo_tx_timeout = lan78xx_tx_timeout, 3679 .ndo_change_mtu = lan78xx_change_mtu, 3680 .ndo_set_mac_address = lan78xx_set_mac_addr, 3681 .ndo_validate_addr = eth_validate_addr, 3682 .ndo_do_ioctl = lan78xx_ioctl, 3683 .ndo_set_rx_mode = lan78xx_set_multicast, 3684 .ndo_set_features = lan78xx_set_features, 3685 .ndo_vlan_rx_add_vid = lan78xx_vlan_rx_add_vid, 3686 .ndo_vlan_rx_kill_vid = lan78xx_vlan_rx_kill_vid, 3687 }; 3688 3689 static void lan78xx_stat_monitor(struct timer_list *t) 3690 { 3691 struct lan78xx_net *dev = from_timer(dev, t, stat_monitor); 3692 3693 lan78xx_defer_kevent(dev, EVENT_STAT_UPDATE); 3694 } 3695 3696 static int lan78xx_probe(struct usb_interface *intf, 3697 const struct usb_device_id *id) 3698 { 3699 struct lan78xx_net *dev; 3700 struct net_device *netdev; 3701 struct usb_device *udev; 3702 int ret; 3703 unsigned maxp; 3704 unsigned period; 3705 u8 *buf = NULL; 3706 3707 udev = interface_to_usbdev(intf); 3708 udev = usb_get_dev(udev); 3709 3710 netdev = alloc_etherdev(sizeof(struct lan78xx_net)); 3711 if (!netdev) { 3712 dev_err(&intf->dev, "Error: OOM\n"); 3713 ret = -ENOMEM; 3714 goto out1; 3715 } 3716 3717 /* netdev_printk() needs this */ 3718 SET_NETDEV_DEV(netdev, &intf->dev); 3719 3720 dev = netdev_priv(netdev); 3721 dev->udev = udev; 3722 dev->intf = intf; 3723 dev->net = netdev; 3724 dev->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV 3725 | NETIF_MSG_PROBE | NETIF_MSG_LINK); 3726 3727 skb_queue_head_init(&dev->rxq); 3728 skb_queue_head_init(&dev->txq); 3729 skb_queue_head_init(&dev->done); 3730 skb_queue_head_init(&dev->rxq_pause); 3731 skb_queue_head_init(&dev->txq_pend); 3732 mutex_init(&dev->phy_mutex); 3733 3734 tasklet_init(&dev->bh, lan78xx_bh, (unsigned long)dev); 3735 INIT_DELAYED_WORK(&dev->wq, lan78xx_delayedwork); 3736 init_usb_anchor(&dev->deferred); 3737 3738 netdev->netdev_ops = &lan78xx_netdev_ops; 3739 netdev->watchdog_timeo = TX_TIMEOUT_JIFFIES; 3740 netdev->ethtool_ops = &lan78xx_ethtool_ops; 3741 3742 dev->delta = 1; 3743 timer_setup(&dev->stat_monitor, lan78xx_stat_monitor, 0); 3744 3745 mutex_init(&dev->stats.access_lock); 3746 3747 ret = lan78xx_bind(dev, intf); 3748 if (ret < 0) 3749 goto out2; 3750 3751 if (netdev->mtu > (dev->hard_mtu - netdev->hard_header_len)) 3752 netdev->mtu = dev->hard_mtu - netdev->hard_header_len; 3753 3754 /* MTU range: 68 - 9000 */ 3755 netdev->max_mtu = MAX_SINGLE_PACKET_SIZE; 3756 3757 dev->ep_blkin = (intf->cur_altsetting)->endpoint + 0; 3758 dev->ep_blkout = (intf->cur_altsetting)->endpoint + 1; 3759 dev->ep_intr = (intf->cur_altsetting)->endpoint + 2; 3760 3761 dev->pipe_in = usb_rcvbulkpipe(udev, BULK_IN_PIPE); 3762 dev->pipe_out = usb_sndbulkpipe(udev, BULK_OUT_PIPE); 3763 3764 dev->pipe_intr = usb_rcvintpipe(dev->udev, 3765 dev->ep_intr->desc.bEndpointAddress & 3766 USB_ENDPOINT_NUMBER_MASK); 3767 period = dev->ep_intr->desc.bInterval; 3768 3769 maxp = usb_maxpacket(dev->udev, dev->pipe_intr, 0); 3770 buf = kmalloc(maxp, GFP_KERNEL); 3771 if (buf) { 3772 dev->urb_intr = usb_alloc_urb(0, GFP_KERNEL); 3773 if (!dev->urb_intr) { 3774 ret = -ENOMEM; 3775 kfree(buf); 3776 goto out3; 3777 } else { 3778 usb_fill_int_urb(dev->urb_intr, dev->udev, 3779 dev->pipe_intr, buf, maxp, 3780 intr_complete, dev, period); 3781 } 3782 } 3783 3784 dev->maxpacket = usb_maxpacket(dev->udev, dev->pipe_out, 1); 3785 3786 /* driver requires remote-wakeup capability during autosuspend. */ 3787 intf->needs_remote_wakeup = 1; 3788 3789 ret = register_netdev(netdev); 3790 if (ret != 0) { 3791 netif_err(dev, probe, netdev, "couldn't register the device\n"); 3792 goto out3; 3793 } 3794 3795 usb_set_intfdata(intf, dev); 3796 3797 ret = device_set_wakeup_enable(&udev->dev, true); 3798 3799 /* Default delay of 2sec has more overhead than advantage. 3800 * Set to 10sec as default. 3801 */ 3802 pm_runtime_set_autosuspend_delay(&udev->dev, 3803 DEFAULT_AUTOSUSPEND_DELAY); 3804 3805 ret = lan78xx_phy_init(dev); 3806 if (ret < 0) 3807 goto out4; 3808 3809 return 0; 3810 3811 out4: 3812 unregister_netdev(netdev); 3813 out3: 3814 lan78xx_unbind(dev, intf); 3815 out2: 3816 free_netdev(netdev); 3817 out1: 3818 usb_put_dev(udev); 3819 3820 return ret; 3821 } 3822 3823 static u16 lan78xx_wakeframe_crc16(const u8 *buf, int len) 3824 { 3825 const u16 crc16poly = 0x8005; 3826 int i; 3827 u16 bit, crc, msb; 3828 u8 data; 3829 3830 crc = 0xFFFF; 3831 for (i = 0; i < len; i++) { 3832 data = *buf++; 3833 for (bit = 0; bit < 8; bit++) { 3834 msb = crc >> 15; 3835 crc <<= 1; 3836 3837 if (msb ^ (u16)(data & 1)) { 3838 crc ^= crc16poly; 3839 crc |= (u16)0x0001U; 3840 } 3841 data >>= 1; 3842 } 3843 } 3844 3845 return crc; 3846 } 3847 3848 static int lan78xx_set_suspend(struct lan78xx_net *dev, u32 wol) 3849 { 3850 u32 buf; 3851 int ret; 3852 int mask_index; 3853 u16 crc; 3854 u32 temp_wucsr; 3855 u32 temp_pmt_ctl; 3856 const u8 ipv4_multicast[3] = { 0x01, 0x00, 0x5E }; 3857 const u8 ipv6_multicast[3] = { 0x33, 0x33 }; 3858 const u8 arp_type[2] = { 0x08, 0x06 }; 3859 3860 ret = lan78xx_read_reg(dev, MAC_TX, &buf); 3861 buf &= ~MAC_TX_TXEN_; 3862 ret = lan78xx_write_reg(dev, MAC_TX, buf); 3863 ret = lan78xx_read_reg(dev, MAC_RX, &buf); 3864 buf &= ~MAC_RX_RXEN_; 3865 ret = lan78xx_write_reg(dev, MAC_RX, buf); 3866 3867 ret = lan78xx_write_reg(dev, WUCSR, 0); 3868 ret = lan78xx_write_reg(dev, WUCSR2, 0); 3869 ret = lan78xx_write_reg(dev, WK_SRC, 0xFFF1FF1FUL); 3870 3871 temp_wucsr = 0; 3872 3873 temp_pmt_ctl = 0; 3874 ret = lan78xx_read_reg(dev, PMT_CTL, &temp_pmt_ctl); 3875 temp_pmt_ctl &= ~PMT_CTL_RES_CLR_WKP_EN_; 3876 temp_pmt_ctl |= PMT_CTL_RES_CLR_WKP_STS_; 3877 3878 for (mask_index = 0; mask_index < NUM_OF_WUF_CFG; mask_index++) 3879 ret = lan78xx_write_reg(dev, WUF_CFG(mask_index), 0); 3880 3881 mask_index = 0; 3882 if (wol & WAKE_PHY) { 3883 temp_pmt_ctl |= PMT_CTL_PHY_WAKE_EN_; 3884 3885 temp_pmt_ctl |= PMT_CTL_WOL_EN_; 3886 temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; 3887 temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_; 3888 } 3889 if (wol & WAKE_MAGIC) { 3890 temp_wucsr |= WUCSR_MPEN_; 3891 3892 temp_pmt_ctl |= PMT_CTL_WOL_EN_; 3893 temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; 3894 temp_pmt_ctl |= PMT_CTL_SUS_MODE_3_; 3895 } 3896 if (wol & WAKE_BCAST) { 3897 temp_wucsr |= WUCSR_BCST_EN_; 3898 3899 temp_pmt_ctl |= PMT_CTL_WOL_EN_; 3900 temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; 3901 temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_; 3902 } 3903 if (wol & WAKE_MCAST) { 3904 temp_wucsr |= WUCSR_WAKE_EN_; 3905 3906 /* set WUF_CFG & WUF_MASK for IPv4 Multicast */ 3907 crc = lan78xx_wakeframe_crc16(ipv4_multicast, 3); 3908 ret = lan78xx_write_reg(dev, WUF_CFG(mask_index), 3909 WUF_CFGX_EN_ | 3910 WUF_CFGX_TYPE_MCAST_ | 3911 (0 << WUF_CFGX_OFFSET_SHIFT_) | 3912 (crc & WUF_CFGX_CRC16_MASK_)); 3913 3914 ret = lan78xx_write_reg(dev, WUF_MASK0(mask_index), 7); 3915 ret = lan78xx_write_reg(dev, WUF_MASK1(mask_index), 0); 3916 ret = lan78xx_write_reg(dev, WUF_MASK2(mask_index), 0); 3917 ret = lan78xx_write_reg(dev, WUF_MASK3(mask_index), 0); 3918 mask_index++; 3919 3920 /* for IPv6 Multicast */ 3921 crc = lan78xx_wakeframe_crc16(ipv6_multicast, 2); 3922 ret = lan78xx_write_reg(dev, WUF_CFG(mask_index), 3923 WUF_CFGX_EN_ | 3924 WUF_CFGX_TYPE_MCAST_ | 3925 (0 << WUF_CFGX_OFFSET_SHIFT_) | 3926 (crc & WUF_CFGX_CRC16_MASK_)); 3927 3928 ret = lan78xx_write_reg(dev, WUF_MASK0(mask_index), 3); 3929 ret = lan78xx_write_reg(dev, WUF_MASK1(mask_index), 0); 3930 ret = lan78xx_write_reg(dev, WUF_MASK2(mask_index), 0); 3931 ret = lan78xx_write_reg(dev, WUF_MASK3(mask_index), 0); 3932 mask_index++; 3933 3934 temp_pmt_ctl |= PMT_CTL_WOL_EN_; 3935 temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; 3936 temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_; 3937 } 3938 if (wol & WAKE_UCAST) { 3939 temp_wucsr |= WUCSR_PFDA_EN_; 3940 3941 temp_pmt_ctl |= PMT_CTL_WOL_EN_; 3942 temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; 3943 temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_; 3944 } 3945 if (wol & WAKE_ARP) { 3946 temp_wucsr |= WUCSR_WAKE_EN_; 3947 3948 /* set WUF_CFG & WUF_MASK 3949 * for packettype (offset 12,13) = ARP (0x0806) 3950 */ 3951 crc = lan78xx_wakeframe_crc16(arp_type, 2); 3952 ret = lan78xx_write_reg(dev, WUF_CFG(mask_index), 3953 WUF_CFGX_EN_ | 3954 WUF_CFGX_TYPE_ALL_ | 3955 (0 << WUF_CFGX_OFFSET_SHIFT_) | 3956 (crc & WUF_CFGX_CRC16_MASK_)); 3957 3958 ret = lan78xx_write_reg(dev, WUF_MASK0(mask_index), 0x3000); 3959 ret = lan78xx_write_reg(dev, WUF_MASK1(mask_index), 0); 3960 ret = lan78xx_write_reg(dev, WUF_MASK2(mask_index), 0); 3961 ret = lan78xx_write_reg(dev, WUF_MASK3(mask_index), 0); 3962 mask_index++; 3963 3964 temp_pmt_ctl |= PMT_CTL_WOL_EN_; 3965 temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; 3966 temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_; 3967 } 3968 3969 ret = lan78xx_write_reg(dev, WUCSR, temp_wucsr); 3970 3971 /* when multiple WOL bits are set */ 3972 if (hweight_long((unsigned long)wol) > 1) { 3973 temp_pmt_ctl |= PMT_CTL_WOL_EN_; 3974 temp_pmt_ctl &= ~PMT_CTL_SUS_MODE_MASK_; 3975 temp_pmt_ctl |= PMT_CTL_SUS_MODE_0_; 3976 } 3977 ret = lan78xx_write_reg(dev, PMT_CTL, temp_pmt_ctl); 3978 3979 /* clear WUPS */ 3980 ret = lan78xx_read_reg(dev, PMT_CTL, &buf); 3981 buf |= PMT_CTL_WUPS_MASK_; 3982 ret = lan78xx_write_reg(dev, PMT_CTL, buf); 3983 3984 ret = lan78xx_read_reg(dev, MAC_RX, &buf); 3985 buf |= MAC_RX_RXEN_; 3986 ret = lan78xx_write_reg(dev, MAC_RX, buf); 3987 3988 return 0; 3989 } 3990 3991 static int lan78xx_suspend(struct usb_interface *intf, pm_message_t message) 3992 { 3993 struct lan78xx_net *dev = usb_get_intfdata(intf); 3994 struct lan78xx_priv *pdata = (struct lan78xx_priv *)(dev->data[0]); 3995 u32 buf; 3996 int ret; 3997 int event; 3998 3999 event = message.event; 4000 4001 if (!dev->suspend_count++) { 4002 spin_lock_irq(&dev->txq.lock); 4003 /* don't autosuspend while transmitting */ 4004 if ((skb_queue_len(&dev->txq) || 4005 skb_queue_len(&dev->txq_pend)) && 4006 PMSG_IS_AUTO(message)) { 4007 spin_unlock_irq(&dev->txq.lock); 4008 ret = -EBUSY; 4009 goto out; 4010 } else { 4011 set_bit(EVENT_DEV_ASLEEP, &dev->flags); 4012 spin_unlock_irq(&dev->txq.lock); 4013 } 4014 4015 /* stop TX & RX */ 4016 ret = lan78xx_read_reg(dev, MAC_TX, &buf); 4017 buf &= ~MAC_TX_TXEN_; 4018 ret = lan78xx_write_reg(dev, MAC_TX, buf); 4019 ret = lan78xx_read_reg(dev, MAC_RX, &buf); 4020 buf &= ~MAC_RX_RXEN_; 4021 ret = lan78xx_write_reg(dev, MAC_RX, buf); 4022 4023 /* empty out the rx and queues */ 4024 netif_device_detach(dev->net); 4025 lan78xx_terminate_urbs(dev); 4026 usb_kill_urb(dev->urb_intr); 4027 4028 /* reattach */ 4029 netif_device_attach(dev->net); 4030 } 4031 4032 if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) { 4033 del_timer(&dev->stat_monitor); 4034 4035 if (PMSG_IS_AUTO(message)) { 4036 /* auto suspend (selective suspend) */ 4037 ret = lan78xx_read_reg(dev, MAC_TX, &buf); 4038 buf &= ~MAC_TX_TXEN_; 4039 ret = lan78xx_write_reg(dev, MAC_TX, buf); 4040 ret = lan78xx_read_reg(dev, MAC_RX, &buf); 4041 buf &= ~MAC_RX_RXEN_; 4042 ret = lan78xx_write_reg(dev, MAC_RX, buf); 4043 4044 ret = lan78xx_write_reg(dev, WUCSR, 0); 4045 ret = lan78xx_write_reg(dev, WUCSR2, 0); 4046 ret = lan78xx_write_reg(dev, WK_SRC, 0xFFF1FF1FUL); 4047 4048 /* set goodframe wakeup */ 4049 ret = lan78xx_read_reg(dev, WUCSR, &buf); 4050 4051 buf |= WUCSR_RFE_WAKE_EN_; 4052 buf |= WUCSR_STORE_WAKE_; 4053 4054 ret = lan78xx_write_reg(dev, WUCSR, buf); 4055 4056 ret = lan78xx_read_reg(dev, PMT_CTL, &buf); 4057 4058 buf &= ~PMT_CTL_RES_CLR_WKP_EN_; 4059 buf |= PMT_CTL_RES_CLR_WKP_STS_; 4060 4061 buf |= PMT_CTL_PHY_WAKE_EN_; 4062 buf |= PMT_CTL_WOL_EN_; 4063 buf &= ~PMT_CTL_SUS_MODE_MASK_; 4064 buf |= PMT_CTL_SUS_MODE_3_; 4065 4066 ret = lan78xx_write_reg(dev, PMT_CTL, buf); 4067 4068 ret = lan78xx_read_reg(dev, PMT_CTL, &buf); 4069 4070 buf |= PMT_CTL_WUPS_MASK_; 4071 4072 ret = lan78xx_write_reg(dev, PMT_CTL, buf); 4073 4074 ret = lan78xx_read_reg(dev, MAC_RX, &buf); 4075 buf |= MAC_RX_RXEN_; 4076 ret = lan78xx_write_reg(dev, MAC_RX, buf); 4077 } else { 4078 lan78xx_set_suspend(dev, pdata->wol); 4079 } 4080 } 4081 4082 ret = 0; 4083 out: 4084 return ret; 4085 } 4086 4087 static int lan78xx_resume(struct usb_interface *intf) 4088 { 4089 struct lan78xx_net *dev = usb_get_intfdata(intf); 4090 struct sk_buff *skb; 4091 struct urb *res; 4092 int ret; 4093 u32 buf; 4094 4095 if (!timer_pending(&dev->stat_monitor)) { 4096 dev->delta = 1; 4097 mod_timer(&dev->stat_monitor, 4098 jiffies + STAT_UPDATE_TIMER); 4099 } 4100 4101 if (!--dev->suspend_count) { 4102 /* resume interrupt URBs */ 4103 if (dev->urb_intr && test_bit(EVENT_DEV_OPEN, &dev->flags)) 4104 usb_submit_urb(dev->urb_intr, GFP_NOIO); 4105 4106 spin_lock_irq(&dev->txq.lock); 4107 while ((res = usb_get_from_anchor(&dev->deferred))) { 4108 skb = (struct sk_buff *)res->context; 4109 ret = usb_submit_urb(res, GFP_ATOMIC); 4110 if (ret < 0) { 4111 dev_kfree_skb_any(skb); 4112 usb_free_urb(res); 4113 usb_autopm_put_interface_async(dev->intf); 4114 } else { 4115 netif_trans_update(dev->net); 4116 lan78xx_queue_skb(&dev->txq, skb, tx_start); 4117 } 4118 } 4119 4120 clear_bit(EVENT_DEV_ASLEEP, &dev->flags); 4121 spin_unlock_irq(&dev->txq.lock); 4122 4123 if (test_bit(EVENT_DEV_OPEN, &dev->flags)) { 4124 if (!(skb_queue_len(&dev->txq) >= dev->tx_qlen)) 4125 netif_start_queue(dev->net); 4126 tasklet_schedule(&dev->bh); 4127 } 4128 } 4129 4130 ret = lan78xx_write_reg(dev, WUCSR2, 0); 4131 ret = lan78xx_write_reg(dev, WUCSR, 0); 4132 ret = lan78xx_write_reg(dev, WK_SRC, 0xFFF1FF1FUL); 4133 4134 ret = lan78xx_write_reg(dev, WUCSR2, WUCSR2_NS_RCD_ | 4135 WUCSR2_ARP_RCD_ | 4136 WUCSR2_IPV6_TCPSYN_RCD_ | 4137 WUCSR2_IPV4_TCPSYN_RCD_); 4138 4139 ret = lan78xx_write_reg(dev, WUCSR, WUCSR_EEE_TX_WAKE_ | 4140 WUCSR_EEE_RX_WAKE_ | 4141 WUCSR_PFDA_FR_ | 4142 WUCSR_RFE_WAKE_FR_ | 4143 WUCSR_WUFR_ | 4144 WUCSR_MPR_ | 4145 WUCSR_BCST_FR_); 4146 4147 ret = lan78xx_read_reg(dev, MAC_TX, &buf); 4148 buf |= MAC_TX_TXEN_; 4149 ret = lan78xx_write_reg(dev, MAC_TX, buf); 4150 4151 return 0; 4152 } 4153 4154 static int lan78xx_reset_resume(struct usb_interface *intf) 4155 { 4156 struct lan78xx_net *dev = usb_get_intfdata(intf); 4157 4158 lan78xx_reset(dev); 4159 4160 phy_start(dev->net->phydev); 4161 4162 return lan78xx_resume(intf); 4163 } 4164 4165 static const struct usb_device_id products[] = { 4166 { 4167 /* LAN7800 USB Gigabit Ethernet Device */ 4168 USB_DEVICE(LAN78XX_USB_VENDOR_ID, LAN7800_USB_PRODUCT_ID), 4169 }, 4170 { 4171 /* LAN7850 USB Gigabit Ethernet Device */ 4172 USB_DEVICE(LAN78XX_USB_VENDOR_ID, LAN7850_USB_PRODUCT_ID), 4173 }, 4174 { 4175 /* LAN7801 USB Gigabit Ethernet Device */ 4176 USB_DEVICE(LAN78XX_USB_VENDOR_ID, LAN7801_USB_PRODUCT_ID), 4177 }, 4178 {}, 4179 }; 4180 MODULE_DEVICE_TABLE(usb, products); 4181 4182 static struct usb_driver lan78xx_driver = { 4183 .name = DRIVER_NAME, 4184 .id_table = products, 4185 .probe = lan78xx_probe, 4186 .disconnect = lan78xx_disconnect, 4187 .suspend = lan78xx_suspend, 4188 .resume = lan78xx_resume, 4189 .reset_resume = lan78xx_reset_resume, 4190 .supports_autosuspend = 1, 4191 .disable_hub_initiated_lpm = 1, 4192 }; 4193 4194 module_usb_driver(lan78xx_driver); 4195 4196 MODULE_AUTHOR(DRIVER_AUTHOR); 4197 MODULE_DESCRIPTION(DRIVER_DESC); 4198 MODULE_LICENSE("GPL"); 4199