Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/usb/net/if_smsc.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 5 * Ben Gray <bgray@freebsd.org>. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 /* 33 * SMSC LAN9xxx devices (http://www.smsc.com/) 34 * 35 * The LAN9500 & LAN9500A devices are stand-alone USB to Ethernet chips that 36 * support USB 2.0 and 10/100 Mbps Ethernet. 37 * 38 * The LAN951x devices are an integrated USB hub and USB to Ethernet adapter. 39 * The driver only covers the Ethernet part, the standard USB hub driver 40 * supports the hub part. 41 * 42 * This driver is closely modelled on the Linux driver written and copyrighted 43 * by SMSC. 44 * 45 * 46 * 47 * 48 * H/W TCP & UDP Checksum Offloading 49 * --------------------------------- 50 * The chip supports both tx and rx offloading of UDP & TCP checksums, this 51 * feature can be dynamically enabled/disabled. 52 * 53 * RX checksuming is performed across bytes after the IPv4 header to the end of 54 * the Ethernet frame, this means if the frame is padded with non-zero values 55 * the H/W checksum will be incorrect, however the rx code compensates for this. 56 * 57 * TX checksuming is more complicated, the device requires a special header to 58 * be prefixed onto the start of the frame which indicates the start and end 59 * positions of the UDP or TCP frame. This requires the driver to manually 60 * go through the packet data and decode the headers prior to sending. 61 * On Linux they generally provide cues to the location of the csum and the 62 * area to calculate it over, on FreeBSD we seem to have to do it all ourselves, 63 * hence this is not as optimal and therefore h/w tX checksum is currently not 64 * implemented. 65 * 66 */ 67 #include <sys/stdint.h> 68 #include <sys/stddef.h> 69 #include <sys/param.h> 70 #include <sys/queue.h> 71 #include <sys/types.h> 72 #include <sys/systm.h> 73 #include <sys/kernel.h> 74 #include <sys/bus.h> 75 #include <sys/module.h> 76 #include <sys/lock.h> 77 #include <sys/mutex.h> 78 #include <sys/condvar.h> 79 #include <sys/socket.h> 80 #include <sys/sysctl.h> 81 #include <sys/sx.h> 82 #include <sys/unistd.h> 83 #include <sys/callout.h> 84 #include <sys/malloc.h> 85 #include <sys/priv.h> 86 #include <sys/random.h> 87 88 #include <net/if.h> 89 #include <net/if_var.h> 90 #include <net/if_media.h> 91 92 #include <dev/mii/mii.h> 93 #include <dev/mii/miivar.h> 94 95 #include <netinet/in.h> 96 #include <netinet/ip.h> 97 98 #include "opt_platform.h" 99 100 #ifdef FDT 101 #include <dev/fdt/fdt_common.h> 102 #include <dev/ofw/ofw_bus.h> 103 #include <dev/ofw/ofw_bus_subr.h> 104 #include <dev/usb/usb_fdt_support.h> 105 #endif 106 107 #include <dev/usb/usb.h> 108 #include <dev/usb/usbdi.h> 109 #include <dev/usb/usbdi_util.h> 110 #include "usbdevs.h" 111 112 #define USB_DEBUG_VAR smsc_debug 113 #include <dev/usb/usb_debug.h> 114 #include <dev/usb/usb_process.h> 115 116 #include <dev/usb/net/usb_ethernet.h> 117 118 #include <dev/usb/net/if_smscreg.h> 119 120 #include "miibus_if.h" 121 122 SYSCTL_NODE(_hw_usb, OID_AUTO, smsc, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 123 "USB smsc"); 124 125 static bool smsc_rx_packet_batching = 1; 126 127 SYSCTL_BOOL(_hw_usb_smsc, OID_AUTO, smsc_rx_packet_batching, CTLFLAG_RDTUN, 128 &smsc_rx_packet_batching, 0, 129 "If set, allows packet batching to increase throughput and latency. " 130 "Else throughput and latency is decreased."); 131 132 #ifdef USB_DEBUG 133 static int smsc_debug = 0; 134 135 SYSCTL_INT(_hw_usb_smsc, OID_AUTO, debug, CTLFLAG_RWTUN, &smsc_debug, 0, 136 "Debug level"); 137 #endif 138 139 /* 140 * Various supported device vendors/products. 141 */ 142 static const struct usb_device_id smsc_devs[] = { 143 #define SMSC_DEV(p,i) { USB_VPI(USB_VENDOR_SMC2, USB_PRODUCT_SMC2_##p, i) } 144 SMSC_DEV(LAN89530_ETH, 0), 145 SMSC_DEV(LAN9500_ETH, 0), 146 SMSC_DEV(LAN9500_ETH_2, 0), 147 SMSC_DEV(LAN9500A_ETH, 0), 148 SMSC_DEV(LAN9500A_ETH_2, 0), 149 SMSC_DEV(LAN9505_ETH, 0), 150 SMSC_DEV(LAN9505A_ETH, 0), 151 SMSC_DEV(LAN9514_ETH, 0), 152 SMSC_DEV(LAN9514_ETH_2, 0), 153 SMSC_DEV(LAN9530_ETH, 0), 154 SMSC_DEV(LAN9730_ETH, 0), 155 SMSC_DEV(LAN9500_SAL10, 0), 156 SMSC_DEV(LAN9505_SAL10, 0), 157 SMSC_DEV(LAN9500A_SAL10, 0), 158 SMSC_DEV(LAN9505A_SAL10, 0), 159 SMSC_DEV(LAN9514_SAL10, 0), 160 SMSC_DEV(LAN9500A_HAL, 0), 161 SMSC_DEV(LAN9505A_HAL, 0), 162 #undef SMSC_DEV 163 }; 164 165 #ifdef USB_DEBUG 166 #define smsc_dbg_printf(sc, fmt, args...) \ 167 do { \ 168 if (smsc_debug > 0) \ 169 device_printf((sc)->sc_ue.ue_dev, "debug: " fmt, ##args); \ 170 } while(0) 171 #else 172 #define smsc_dbg_printf(sc, fmt, args...) do { } while (0) 173 #endif 174 175 #define smsc_warn_printf(sc, fmt, args...) \ 176 device_printf((sc)->sc_ue.ue_dev, "warning: " fmt, ##args) 177 178 #define smsc_err_printf(sc, fmt, args...) \ 179 device_printf((sc)->sc_ue.ue_dev, "error: " fmt, ##args) 180 181 #define ETHER_IS_VALID(addr) \ 182 (!ETHER_IS_MULTICAST(addr) && !ETHER_IS_ZERO(addr)) 183 184 static device_probe_t smsc_probe; 185 static device_attach_t smsc_attach; 186 static device_detach_t smsc_detach; 187 188 static usb_callback_t smsc_bulk_read_callback; 189 static usb_callback_t smsc_bulk_write_callback; 190 191 static miibus_readreg_t smsc_miibus_readreg; 192 static miibus_writereg_t smsc_miibus_writereg; 193 static miibus_statchg_t smsc_miibus_statchg; 194 195 static int smsc_attach_post_sub(struct usb_ether *ue); 196 static uether_fn_t smsc_attach_post; 197 static uether_fn_t smsc_init; 198 static uether_fn_t smsc_stop; 199 static uether_fn_t smsc_start; 200 static uether_fn_t smsc_tick; 201 static uether_fn_t smsc_setmulti; 202 static uether_fn_t smsc_setpromisc; 203 204 static int smsc_ifmedia_upd(struct ifnet *); 205 static void smsc_ifmedia_sts(struct ifnet *, struct ifmediareq *); 206 207 static int smsc_chip_init(struct smsc_softc *sc); 208 static int smsc_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data); 209 210 static const struct usb_config smsc_config[SMSC_N_TRANSFER] = { 211 [SMSC_BULK_DT_WR] = { 212 .type = UE_BULK, 213 .endpoint = UE_ADDR_ANY, 214 .direction = UE_DIR_OUT, 215 .frames = 16, 216 .bufsize = 16 * (MCLBYTES + 16), 217 .flags = {.pipe_bof = 1,.force_short_xfer = 1,}, 218 .callback = smsc_bulk_write_callback, 219 .timeout = 10000, /* 10 seconds */ 220 }, 221 222 [SMSC_BULK_DT_RD] = { 223 .type = UE_BULK, 224 .endpoint = UE_ADDR_ANY, 225 .direction = UE_DIR_IN, 226 .bufsize = 20480, /* bytes */ 227 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 228 .callback = smsc_bulk_read_callback, 229 .timeout = 0, /* no timeout */ 230 }, 231 232 /* The SMSC chip supports an interrupt endpoints, however they aren't 233 * needed as we poll on the MII status. 234 */ 235 }; 236 237 static const struct usb_ether_methods smsc_ue_methods = { 238 .ue_attach_post = smsc_attach_post, 239 .ue_attach_post_sub = smsc_attach_post_sub, 240 .ue_start = smsc_start, 241 .ue_ioctl = smsc_ioctl, 242 .ue_init = smsc_init, 243 .ue_stop = smsc_stop, 244 .ue_tick = smsc_tick, 245 .ue_setmulti = smsc_setmulti, 246 .ue_setpromisc = smsc_setpromisc, 247 .ue_mii_upd = smsc_ifmedia_upd, 248 .ue_mii_sts = smsc_ifmedia_sts, 249 }; 250 251 /** 252 * smsc_read_reg - Reads a 32-bit register on the device 253 * @sc: driver soft context 254 * @off: offset of the register 255 * @data: pointer a value that will be populated with the register value 256 * 257 * LOCKING: 258 * The device lock must be held before calling this function. 259 * 260 * RETURNS: 261 * 0 on success, a USB_ERR_?? error code on failure. 262 */ 263 static int 264 smsc_read_reg(struct smsc_softc *sc, uint32_t off, uint32_t *data) 265 { 266 struct usb_device_request req; 267 uint32_t buf; 268 usb_error_t err; 269 270 SMSC_LOCK_ASSERT(sc, MA_OWNED); 271 272 req.bmRequestType = UT_READ_VENDOR_DEVICE; 273 req.bRequest = SMSC_UR_READ_REG; 274 USETW(req.wValue, 0); 275 USETW(req.wIndex, off); 276 USETW(req.wLength, 4); 277 278 err = uether_do_request(&sc->sc_ue, &req, &buf, 1000); 279 if (err != 0) 280 smsc_warn_printf(sc, "Failed to read register 0x%0x\n", off); 281 282 *data = le32toh(buf); 283 284 return (err); 285 } 286 287 /** 288 * smsc_write_reg - Writes a 32-bit register on the device 289 * @sc: driver soft context 290 * @off: offset of the register 291 * @data: the 32-bit value to write into the register 292 * 293 * LOCKING: 294 * The device lock must be held before calling this function. 295 * 296 * RETURNS: 297 * 0 on success, a USB_ERR_?? error code on failure. 298 */ 299 static int 300 smsc_write_reg(struct smsc_softc *sc, uint32_t off, uint32_t data) 301 { 302 struct usb_device_request req; 303 uint32_t buf; 304 usb_error_t err; 305 306 SMSC_LOCK_ASSERT(sc, MA_OWNED); 307 308 buf = htole32(data); 309 310 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 311 req.bRequest = SMSC_UR_WRITE_REG; 312 USETW(req.wValue, 0); 313 USETW(req.wIndex, off); 314 USETW(req.wLength, 4); 315 316 err = uether_do_request(&sc->sc_ue, &req, &buf, 1000); 317 if (err != 0) 318 smsc_warn_printf(sc, "Failed to write register 0x%0x\n", off); 319 320 return (err); 321 } 322 323 /** 324 * smsc_wait_for_bits - Polls on a register value until bits are cleared 325 * @sc: soft context 326 * @reg: offset of the register 327 * @bits: if the bits are clear the function returns 328 * 329 * LOCKING: 330 * The device lock must be held before calling this function. 331 * 332 * RETURNS: 333 * 0 on success, or a USB_ERR_?? error code on failure. 334 */ 335 static int 336 smsc_wait_for_bits(struct smsc_softc *sc, uint32_t reg, uint32_t bits) 337 { 338 usb_ticks_t start_ticks; 339 const usb_ticks_t max_ticks = USB_MS_TO_TICKS(1000); 340 uint32_t val; 341 int err; 342 343 SMSC_LOCK_ASSERT(sc, MA_OWNED); 344 345 start_ticks = (usb_ticks_t)ticks; 346 do { 347 if ((err = smsc_read_reg(sc, reg, &val)) != 0) 348 return (err); 349 if (!(val & bits)) 350 return (0); 351 352 uether_pause(&sc->sc_ue, hz / 100); 353 } while (((usb_ticks_t)(ticks - start_ticks)) < max_ticks); 354 355 return (USB_ERR_TIMEOUT); 356 } 357 358 /** 359 * smsc_eeprom_read - Reads the attached EEPROM 360 * @sc: soft context 361 * @off: the eeprom address offset 362 * @buf: stores the bytes 363 * @buflen: the number of bytes to read 364 * 365 * Simply reads bytes from an attached eeprom. 366 * 367 * LOCKING: 368 * The function takes and releases the device lock if it is not already held. 369 * 370 * RETURNS: 371 * 0 on success, or a USB_ERR_?? error code on failure. 372 */ 373 static int 374 smsc_eeprom_read(struct smsc_softc *sc, uint16_t off, uint8_t *buf, uint16_t buflen) 375 { 376 usb_ticks_t start_ticks; 377 const usb_ticks_t max_ticks = USB_MS_TO_TICKS(1000); 378 int err; 379 int locked; 380 uint32_t val; 381 uint16_t i; 382 383 locked = mtx_owned(&sc->sc_mtx); 384 if (!locked) 385 SMSC_LOCK(sc); 386 387 err = smsc_wait_for_bits(sc, SMSC_EEPROM_CMD, SMSC_EEPROM_CMD_BUSY); 388 if (err != 0) { 389 smsc_warn_printf(sc, "eeprom busy, failed to read data\n"); 390 goto done; 391 } 392 393 /* start reading the bytes, one at a time */ 394 for (i = 0; i < buflen; i++) { 395 val = SMSC_EEPROM_CMD_BUSY | (SMSC_EEPROM_CMD_ADDR_MASK & (off + i)); 396 if ((err = smsc_write_reg(sc, SMSC_EEPROM_CMD, val)) != 0) 397 goto done; 398 399 start_ticks = (usb_ticks_t)ticks; 400 do { 401 if ((err = smsc_read_reg(sc, SMSC_EEPROM_CMD, &val)) != 0) 402 goto done; 403 if (!(val & SMSC_EEPROM_CMD_BUSY) || (val & SMSC_EEPROM_CMD_TIMEOUT)) 404 break; 405 406 uether_pause(&sc->sc_ue, hz / 100); 407 } while (((usb_ticks_t)(ticks - start_ticks)) < max_ticks); 408 409 if (val & (SMSC_EEPROM_CMD_BUSY | SMSC_EEPROM_CMD_TIMEOUT)) { 410 smsc_warn_printf(sc, "eeprom command failed\n"); 411 err = USB_ERR_IOERROR; 412 break; 413 } 414 415 if ((err = smsc_read_reg(sc, SMSC_EEPROM_DATA, &val)) != 0) 416 goto done; 417 418 buf[i] = (val & 0xff); 419 } 420 421 done: 422 if (!locked) 423 SMSC_UNLOCK(sc); 424 425 return (err); 426 } 427 428 /** 429 * smsc_miibus_readreg - Reads a MII/MDIO register 430 * @dev: usb ether device 431 * @phy: the number of phy reading from 432 * @reg: the register address 433 * 434 * Attempts to read a phy register over the MII bus. 435 * 436 * LOCKING: 437 * Takes and releases the device mutex lock if not already held. 438 * 439 * RETURNS: 440 * Returns the 16-bits read from the MII register, if this function fails 0 441 * is returned. 442 */ 443 static int 444 smsc_miibus_readreg(device_t dev, int phy, int reg) 445 { 446 struct smsc_softc *sc = device_get_softc(dev); 447 int locked; 448 uint32_t addr; 449 uint32_t val = 0; 450 451 locked = mtx_owned(&sc->sc_mtx); 452 if (!locked) 453 SMSC_LOCK(sc); 454 455 if (smsc_wait_for_bits(sc, SMSC_MII_ADDR, SMSC_MII_BUSY) != 0) { 456 smsc_warn_printf(sc, "MII is busy\n"); 457 goto done; 458 } 459 460 addr = (phy << 11) | (reg << 6) | SMSC_MII_READ | SMSC_MII_BUSY; 461 smsc_write_reg(sc, SMSC_MII_ADDR, addr); 462 463 if (smsc_wait_for_bits(sc, SMSC_MII_ADDR, SMSC_MII_BUSY) != 0) 464 smsc_warn_printf(sc, "MII read timeout\n"); 465 466 smsc_read_reg(sc, SMSC_MII_DATA, &val); 467 val = le32toh(val); 468 469 done: 470 if (!locked) 471 SMSC_UNLOCK(sc); 472 473 return (val & 0xFFFF); 474 } 475 476 /** 477 * smsc_miibus_writereg - Writes a MII/MDIO register 478 * @dev: usb ether device 479 * @phy: the number of phy writing to 480 * @reg: the register address 481 * @val: the value to write 482 * 483 * Attempts to write a phy register over the MII bus. 484 * 485 * LOCKING: 486 * Takes and releases the device mutex lock if not already held. 487 * 488 * RETURNS: 489 * Always returns 0 regardless of success or failure. 490 */ 491 static int 492 smsc_miibus_writereg(device_t dev, int phy, int reg, int val) 493 { 494 struct smsc_softc *sc = device_get_softc(dev); 495 int locked; 496 uint32_t addr; 497 498 if (sc->sc_phyno != phy) 499 return (0); 500 501 locked = mtx_owned(&sc->sc_mtx); 502 if (!locked) 503 SMSC_LOCK(sc); 504 505 if (smsc_wait_for_bits(sc, SMSC_MII_ADDR, SMSC_MII_BUSY) != 0) { 506 smsc_warn_printf(sc, "MII is busy\n"); 507 goto done; 508 } 509 510 val = htole32(val); 511 smsc_write_reg(sc, SMSC_MII_DATA, val); 512 513 addr = (phy << 11) | (reg << 6) | SMSC_MII_WRITE | SMSC_MII_BUSY; 514 smsc_write_reg(sc, SMSC_MII_ADDR, addr); 515 516 if (smsc_wait_for_bits(sc, SMSC_MII_ADDR, SMSC_MII_BUSY) != 0) 517 smsc_warn_printf(sc, "MII write timeout\n"); 518 519 done: 520 if (!locked) 521 SMSC_UNLOCK(sc); 522 return (0); 523 } 524 525 /** 526 * smsc_miibus_statchg - Called to detect phy status change 527 * @dev: usb ether device 528 * 529 * This function is called periodically by the system to poll for status 530 * changes of the link. 531 * 532 * LOCKING: 533 * Takes and releases the device mutex lock if not already held. 534 */ 535 static void 536 smsc_miibus_statchg(device_t dev) 537 { 538 struct smsc_softc *sc = device_get_softc(dev); 539 struct mii_data *mii = uether_getmii(&sc->sc_ue); 540 struct ifnet *ifp; 541 int locked; 542 int err; 543 uint32_t flow; 544 uint32_t afc_cfg; 545 546 locked = mtx_owned(&sc->sc_mtx); 547 if (!locked) 548 SMSC_LOCK(sc); 549 550 ifp = uether_getifp(&sc->sc_ue); 551 if (mii == NULL || ifp == NULL || 552 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) 553 goto done; 554 555 /* Use the MII status to determine link status */ 556 sc->sc_flags &= ~SMSC_FLAG_LINK; 557 if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) == 558 (IFM_ACTIVE | IFM_AVALID)) { 559 switch (IFM_SUBTYPE(mii->mii_media_active)) { 560 case IFM_10_T: 561 case IFM_100_TX: 562 sc->sc_flags |= SMSC_FLAG_LINK; 563 break; 564 case IFM_1000_T: 565 /* Gigabit ethernet not supported by chipset */ 566 break; 567 default: 568 break; 569 } 570 } 571 572 /* Lost link, do nothing. */ 573 if ((sc->sc_flags & SMSC_FLAG_LINK) == 0) { 574 smsc_dbg_printf(sc, "link flag not set\n"); 575 goto done; 576 } 577 578 err = smsc_read_reg(sc, SMSC_AFC_CFG, &afc_cfg); 579 if (err) { 580 smsc_warn_printf(sc, "failed to read initial AFC_CFG, error %d\n", err); 581 goto done; 582 } 583 584 /* Enable/disable full duplex operation and TX/RX pause */ 585 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0) { 586 smsc_dbg_printf(sc, "full duplex operation\n"); 587 sc->sc_mac_csr &= ~SMSC_MAC_CSR_RCVOWN; 588 sc->sc_mac_csr |= SMSC_MAC_CSR_FDPX; 589 590 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_RXPAUSE) != 0) 591 flow = 0xffff0002; 592 else 593 flow = 0; 594 595 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_TXPAUSE) != 0) 596 afc_cfg |= 0xf; 597 else 598 afc_cfg &= ~0xf; 599 600 } else { 601 smsc_dbg_printf(sc, "half duplex operation\n"); 602 sc->sc_mac_csr &= ~SMSC_MAC_CSR_FDPX; 603 sc->sc_mac_csr |= SMSC_MAC_CSR_RCVOWN; 604 605 flow = 0; 606 afc_cfg |= 0xf; 607 } 608 609 err = smsc_write_reg(sc, SMSC_MAC_CSR, sc->sc_mac_csr); 610 err += smsc_write_reg(sc, SMSC_FLOW, flow); 611 err += smsc_write_reg(sc, SMSC_AFC_CFG, afc_cfg); 612 if (err) 613 smsc_warn_printf(sc, "media change failed, error %d\n", err); 614 615 done: 616 if (!locked) 617 SMSC_UNLOCK(sc); 618 } 619 620 /** 621 * smsc_ifmedia_upd - Set media options 622 * @ifp: interface pointer 623 * 624 * Basically boilerplate code that simply calls the mii functions to set the 625 * media options. 626 * 627 * LOCKING: 628 * The device lock must be held before this function is called. 629 * 630 * RETURNS: 631 * Returns 0 on success or a negative error code. 632 */ 633 static int 634 smsc_ifmedia_upd(struct ifnet *ifp) 635 { 636 struct smsc_softc *sc = ifp->if_softc; 637 struct mii_data *mii = uether_getmii(&sc->sc_ue); 638 struct mii_softc *miisc; 639 int err; 640 641 SMSC_LOCK_ASSERT(sc, MA_OWNED); 642 643 LIST_FOREACH(miisc, &mii->mii_phys, mii_list) 644 PHY_RESET(miisc); 645 err = mii_mediachg(mii); 646 return (err); 647 } 648 649 /** 650 * smsc_ifmedia_sts - Report current media status 651 * @ifp: inet interface pointer 652 * @ifmr: interface media request 653 * 654 * Basically boilerplate code that simply calls the mii functions to get the 655 * media status. 656 * 657 * LOCKING: 658 * Internally takes and releases the device lock. 659 */ 660 static void 661 smsc_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr) 662 { 663 struct smsc_softc *sc = ifp->if_softc; 664 struct mii_data *mii = uether_getmii(&sc->sc_ue); 665 666 SMSC_LOCK(sc); 667 mii_pollstat(mii); 668 ifmr->ifm_active = mii->mii_media_active; 669 ifmr->ifm_status = mii->mii_media_status; 670 SMSC_UNLOCK(sc); 671 } 672 673 /** 674 * smsc_hash - Calculate the hash of a mac address 675 * @addr: The mac address to calculate the hash on 676 * 677 * This function is used when configuring a range of m'cast mac addresses to 678 * filter on. The hash of the mac address is put in the device's mac hash 679 * table. 680 * 681 * RETURNS: 682 * Returns a value from 0-63 value which is the hash of the mac address. 683 */ 684 static inline uint32_t 685 smsc_hash(uint8_t addr[ETHER_ADDR_LEN]) 686 { 687 return (ether_crc32_be(addr, ETHER_ADDR_LEN) >> 26) & 0x3f; 688 } 689 690 static u_int 691 smsc_hash_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt) 692 { 693 uint32_t hash, *hashtbl = arg; 694 695 hash = smsc_hash(LLADDR(sdl)); 696 hashtbl[hash >> 5] |= 1 << (hash & 0x1F); 697 698 return (1); 699 } 700 701 /** 702 * smsc_setmulti - Setup multicast 703 * @ue: usb ethernet device context 704 * 705 * Tells the device to either accept frames with a multicast mac address, a 706 * select group of m'cast mac addresses or just the devices mac address. 707 * 708 * LOCKING: 709 * Should be called with the SMSC lock held. 710 */ 711 static void 712 smsc_setmulti(struct usb_ether *ue) 713 { 714 struct smsc_softc *sc = uether_getsc(ue); 715 struct ifnet *ifp = uether_getifp(ue); 716 uint32_t hashtbl[2] = { 0, 0 }; 717 718 SMSC_LOCK_ASSERT(sc, MA_OWNED); 719 720 if (ifp->if_flags & (IFF_ALLMULTI | IFF_PROMISC)) { 721 smsc_dbg_printf(sc, "receive all multicast enabled\n"); 722 sc->sc_mac_csr |= SMSC_MAC_CSR_MCPAS; 723 sc->sc_mac_csr &= ~SMSC_MAC_CSR_HPFILT; 724 725 } else { 726 if (if_foreach_llmaddr(ifp, smsc_hash_maddr, &hashtbl) > 0) { 727 /* We are filtering on a set of address so calculate 728 * hashes of each of the address and set the 729 * corresponding bits in the register. 730 */ 731 sc->sc_mac_csr |= SMSC_MAC_CSR_HPFILT; 732 sc->sc_mac_csr &= ~(SMSC_MAC_CSR_PRMS | SMSC_MAC_CSR_MCPAS); 733 } else { 734 /* Only receive packets with destination set to 735 * our mac address 736 */ 737 sc->sc_mac_csr &= ~(SMSC_MAC_CSR_MCPAS | SMSC_MAC_CSR_HPFILT); 738 } 739 740 /* Debug */ 741 if (sc->sc_mac_csr & SMSC_MAC_CSR_HPFILT) 742 smsc_dbg_printf(sc, "receive select group of macs\n"); 743 else 744 smsc_dbg_printf(sc, "receive own packets only\n"); 745 } 746 747 /* Write the hash table and mac control registers */ 748 smsc_write_reg(sc, SMSC_HASHH, hashtbl[1]); 749 smsc_write_reg(sc, SMSC_HASHL, hashtbl[0]); 750 smsc_write_reg(sc, SMSC_MAC_CSR, sc->sc_mac_csr); 751 } 752 753 /** 754 * smsc_setpromisc - Enables/disables promiscuous mode 755 * @ue: usb ethernet device context 756 * 757 * LOCKING: 758 * Should be called with the SMSC lock held. 759 */ 760 static void 761 smsc_setpromisc(struct usb_ether *ue) 762 { 763 struct smsc_softc *sc = uether_getsc(ue); 764 struct ifnet *ifp = uether_getifp(ue); 765 766 smsc_dbg_printf(sc, "promiscuous mode %sabled\n", 767 (ifp->if_flags & IFF_PROMISC) ? "en" : "dis"); 768 769 SMSC_LOCK_ASSERT(sc, MA_OWNED); 770 771 if (ifp->if_flags & IFF_PROMISC) 772 sc->sc_mac_csr |= SMSC_MAC_CSR_PRMS; 773 else 774 sc->sc_mac_csr &= ~SMSC_MAC_CSR_PRMS; 775 776 smsc_write_reg(sc, SMSC_MAC_CSR, sc->sc_mac_csr); 777 } 778 779 /** 780 * smsc_sethwcsum - Enable or disable H/W UDP and TCP checksumming 781 * @sc: driver soft context 782 * 783 * LOCKING: 784 * Should be called with the SMSC lock held. 785 * 786 * RETURNS: 787 * Returns 0 on success or a negative error code. 788 */ 789 static int smsc_sethwcsum(struct smsc_softc *sc) 790 { 791 struct ifnet *ifp = uether_getifp(&sc->sc_ue); 792 uint32_t val; 793 int err; 794 795 if (!ifp) 796 return (-EIO); 797 798 SMSC_LOCK_ASSERT(sc, MA_OWNED); 799 800 err = smsc_read_reg(sc, SMSC_COE_CTRL, &val); 801 if (err != 0) { 802 smsc_warn_printf(sc, "failed to read SMSC_COE_CTRL (err=%d)\n", err); 803 return (err); 804 } 805 806 /* Enable/disable the Rx checksum */ 807 if ((ifp->if_capabilities & ifp->if_capenable) & IFCAP_RXCSUM) 808 val |= SMSC_COE_CTRL_RX_EN; 809 else 810 val &= ~SMSC_COE_CTRL_RX_EN; 811 812 /* Enable/disable the Tx checksum (currently not supported) */ 813 if ((ifp->if_capabilities & ifp->if_capenable) & IFCAP_TXCSUM) 814 val |= SMSC_COE_CTRL_TX_EN; 815 else 816 val &= ~SMSC_COE_CTRL_TX_EN; 817 818 err = smsc_write_reg(sc, SMSC_COE_CTRL, val); 819 if (err != 0) { 820 smsc_warn_printf(sc, "failed to write SMSC_COE_CTRL (err=%d)\n", err); 821 return (err); 822 } 823 824 return (0); 825 } 826 827 /** 828 * smsc_setmacaddress - Sets the mac address in the device 829 * @sc: driver soft context 830 * @addr: pointer to array contain at least 6 bytes of the mac 831 * 832 * Writes the MAC address into the device, usually the MAC is programmed with 833 * values from the EEPROM. 834 * 835 * LOCKING: 836 * Should be called with the SMSC lock held. 837 * 838 * RETURNS: 839 * Returns 0 on success or a negative error code. 840 */ 841 static int 842 smsc_setmacaddress(struct smsc_softc *sc, const uint8_t *addr) 843 { 844 int err; 845 uint32_t val; 846 847 smsc_dbg_printf(sc, "setting mac address to %02x:%02x:%02x:%02x:%02x:%02x\n", 848 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 849 850 SMSC_LOCK_ASSERT(sc, MA_OWNED); 851 852 val = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0]; 853 if ((err = smsc_write_reg(sc, SMSC_MAC_ADDRL, val)) != 0) 854 goto done; 855 856 val = (addr[5] << 8) | addr[4]; 857 err = smsc_write_reg(sc, SMSC_MAC_ADDRH, val); 858 859 done: 860 return (err); 861 } 862 863 /** 864 * smsc_reset - Reset the SMSC chip 865 * @sc: device soft context 866 * 867 * LOCKING: 868 * Should be called with the SMSC lock held. 869 */ 870 static void 871 smsc_reset(struct smsc_softc *sc) 872 { 873 struct usb_config_descriptor *cd; 874 usb_error_t err; 875 876 cd = usbd_get_config_descriptor(sc->sc_ue.ue_udev); 877 878 err = usbd_req_set_config(sc->sc_ue.ue_udev, &sc->sc_mtx, 879 cd->bConfigurationValue); 880 if (err) 881 smsc_warn_printf(sc, "reset failed (ignored)\n"); 882 883 /* Wait a little while for the chip to get its brains in order. */ 884 uether_pause(&sc->sc_ue, hz / 100); 885 886 /* Reinitialize controller to achieve full reset. */ 887 smsc_chip_init(sc); 888 } 889 890 /** 891 * smsc_init - Initialises the LAN95xx chip 892 * @ue: USB ether interface 893 * 894 * Called when the interface is brought up (i.e. ifconfig ue0 up), this 895 * initialise the interface and the rx/tx pipes. 896 * 897 * LOCKING: 898 * Should be called with the SMSC lock held. 899 */ 900 static void 901 smsc_init(struct usb_ether *ue) 902 { 903 struct smsc_softc *sc = uether_getsc(ue); 904 struct ifnet *ifp = uether_getifp(ue); 905 906 SMSC_LOCK_ASSERT(sc, MA_OWNED); 907 908 if (smsc_setmacaddress(sc, IF_LLADDR(ifp))) 909 smsc_dbg_printf(sc, "setting MAC address failed\n"); 910 911 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) 912 return; 913 914 /* Cancel pending I/O */ 915 smsc_stop(ue); 916 917 /* Reset the ethernet interface. */ 918 smsc_reset(sc); 919 920 /* Load the multicast filter. */ 921 smsc_setmulti(ue); 922 923 /* TCP/UDP checksum offload engines. */ 924 smsc_sethwcsum(sc); 925 926 usbd_xfer_set_stall(sc->sc_xfer[SMSC_BULK_DT_WR]); 927 928 /* Indicate we are up and running. */ 929 ifp->if_drv_flags |= IFF_DRV_RUNNING; 930 931 /* Switch to selected media. */ 932 smsc_ifmedia_upd(ifp); 933 smsc_start(ue); 934 } 935 936 /** 937 * smsc_bulk_read_callback - Read callback used to process the USB URB 938 * @xfer: the USB transfer 939 * @error: 940 * 941 * Reads the URB data which can contain one or more ethernet frames, the 942 * frames are copyed into a mbuf and given to the system. 943 * 944 * LOCKING: 945 * No locking required, doesn't access internal driver settings. 946 */ 947 static void 948 smsc_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error) 949 { 950 struct smsc_softc *sc = usbd_xfer_softc(xfer); 951 struct usb_ether *ue = &sc->sc_ue; 952 struct ifnet *ifp = uether_getifp(ue); 953 struct mbuf *m; 954 struct usb_page_cache *pc; 955 uint32_t rxhdr; 956 int pktlen; 957 int off; 958 int actlen; 959 960 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 961 smsc_dbg_printf(sc, "rx : actlen %d\n", actlen); 962 963 switch (USB_GET_STATE(xfer)) { 964 case USB_ST_TRANSFERRED: 965 966 /* There is always a zero length frame after bringing the IF up */ 967 if (actlen < (sizeof(rxhdr) + ETHER_CRC_LEN)) 968 goto tr_setup; 969 970 /* There maybe multiple packets in the USB frame, each will have a 971 * header and each needs to have it's own mbuf allocated and populated 972 * for it. 973 */ 974 pc = usbd_xfer_get_frame(xfer, 0); 975 off = 0; 976 977 while (off < actlen) { 978 979 /* The frame header is always aligned on a 4 byte boundary */ 980 off = ((off + 0x3) & ~0x3); 981 982 if ((off + sizeof(rxhdr)) > actlen) 983 goto tr_setup; 984 985 usbd_copy_out(pc, off, &rxhdr, sizeof(rxhdr)); 986 off += (sizeof(rxhdr) + ETHER_ALIGN); 987 rxhdr = le32toh(rxhdr); 988 989 pktlen = (uint16_t)SMSC_RX_STAT_FRM_LENGTH(rxhdr); 990 991 smsc_dbg_printf(sc, "rx : rxhdr 0x%08x : pktlen %d : actlen %d : " 992 "off %d\n", rxhdr, pktlen, actlen, off); 993 994 995 if (rxhdr & SMSC_RX_STAT_ERROR) { 996 smsc_dbg_printf(sc, "rx error (hdr 0x%08x)\n", rxhdr); 997 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 998 if (rxhdr & SMSC_RX_STAT_COLLISION) 999 if_inc_counter(ifp, IFCOUNTER_COLLISIONS, 1); 1000 } else { 1001 /* Check if the ethernet frame is too big or too small */ 1002 if ((pktlen < ETHER_HDR_LEN) || (pktlen > (actlen - off))) 1003 goto tr_setup; 1004 1005 /* Create a new mbuf to store the packet in */ 1006 m = uether_newbuf(); 1007 if (m == NULL) { 1008 smsc_warn_printf(sc, "failed to create new mbuf\n"); 1009 if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 1010 goto tr_setup; 1011 } 1012 if (pktlen > m->m_len) { 1013 smsc_dbg_printf(sc, "buffer too small %d vs %d bytes", 1014 pktlen, m->m_len); 1015 if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 1016 m_freem(m); 1017 goto tr_setup; 1018 } 1019 usbd_copy_out(pc, off, mtod(m, uint8_t *), pktlen); 1020 1021 /* Check if RX TCP/UDP checksumming is being offloaded */ 1022 if ((ifp->if_capenable & IFCAP_RXCSUM) != 0) { 1023 struct ether_header *eh; 1024 1025 eh = mtod(m, struct ether_header *); 1026 1027 /* Remove the extra 2 bytes of the csum */ 1028 pktlen -= 2; 1029 1030 /* The checksum appears to be simplistically calculated 1031 * over the udp/tcp header and data up to the end of the 1032 * eth frame. Which means if the eth frame is padded 1033 * the csum calculation is incorrectly performed over 1034 * the padding bytes as well. Therefore to be safe we 1035 * ignore the H/W csum on frames less than or equal to 1036 * 64 bytes. 1037 * 1038 * Ignore H/W csum for non-IPv4 packets. 1039 */ 1040 if ((be16toh(eh->ether_type) == ETHERTYPE_IP) && 1041 (pktlen > ETHER_MIN_LEN)) { 1042 struct ip *ip; 1043 1044 ip = (struct ip *)(eh + 1); 1045 if ((ip->ip_v == IPVERSION) && 1046 ((ip->ip_p == IPPROTO_TCP) || 1047 (ip->ip_p == IPPROTO_UDP))) { 1048 /* Indicate the UDP/TCP csum has been calculated */ 1049 m->m_pkthdr.csum_flags |= CSUM_DATA_VALID; 1050 1051 /* Copy the TCP/UDP checksum from the last 2 bytes 1052 * of the transfer and put in the csum_data field. 1053 */ 1054 usbd_copy_out(pc, (off + pktlen), 1055 &m->m_pkthdr.csum_data, 2); 1056 1057 /* The data is copied in network order, but the 1058 * csum algorithm in the kernel expects it to be 1059 * in host network order. 1060 */ 1061 m->m_pkthdr.csum_data = ntohs(m->m_pkthdr.csum_data); 1062 1063 smsc_dbg_printf(sc, "RX checksum offloaded (0x%04x)\n", 1064 m->m_pkthdr.csum_data); 1065 } 1066 } 1067 1068 /* Need to adjust the offset as well or we'll be off 1069 * by 2 because the csum is removed from the packet 1070 * length. 1071 */ 1072 off += 2; 1073 } 1074 1075 /* Finally enqueue the mbuf on the receive queue */ 1076 /* Remove 4 trailing bytes */ 1077 if (pktlen < (4 + ETHER_HDR_LEN)) { 1078 m_freem(m); 1079 goto tr_setup; 1080 } 1081 uether_rxmbuf(ue, m, pktlen - 4); 1082 } 1083 1084 /* Update the offset to move to the next potential packet */ 1085 off += pktlen; 1086 } 1087 1088 /* FALLTHROUGH */ 1089 1090 case USB_ST_SETUP: 1091 tr_setup: 1092 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 1093 usbd_transfer_submit(xfer); 1094 uether_rxflush(ue); 1095 return; 1096 1097 default: 1098 if (error != USB_ERR_CANCELLED) { 1099 smsc_warn_printf(sc, "bulk read error, %s\n", usbd_errstr(error)); 1100 usbd_xfer_set_stall(xfer); 1101 goto tr_setup; 1102 } 1103 return; 1104 } 1105 } 1106 1107 /** 1108 * smsc_bulk_write_callback - Write callback used to send ethernet frame(s) 1109 * @xfer: the USB transfer 1110 * @error: error code if the transfers is in an errored state 1111 * 1112 * The main write function that pulls ethernet frames off the queue and sends 1113 * them out. 1114 * 1115 * LOCKING: 1116 * 1117 */ 1118 static void 1119 smsc_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error) 1120 { 1121 struct smsc_softc *sc = usbd_xfer_softc(xfer); 1122 struct ifnet *ifp = uether_getifp(&sc->sc_ue); 1123 struct usb_page_cache *pc; 1124 struct mbuf *m; 1125 uint32_t txhdr; 1126 uint32_t frm_len = 0; 1127 int nframes; 1128 1129 switch (USB_GET_STATE(xfer)) { 1130 case USB_ST_TRANSFERRED: 1131 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1132 /* FALLTHROUGH */ 1133 1134 case USB_ST_SETUP: 1135 tr_setup: 1136 if ((sc->sc_flags & SMSC_FLAG_LINK) == 0 || 1137 (ifp->if_drv_flags & IFF_DRV_OACTIVE) != 0) { 1138 /* Don't send anything if there is no link or controller is busy. */ 1139 return; 1140 } 1141 1142 for (nframes = 0; nframes < 16 && 1143 !IFQ_DRV_IS_EMPTY(&ifp->if_snd); nframes++) { 1144 IFQ_DRV_DEQUEUE(&ifp->if_snd, m); 1145 if (m == NULL) 1146 break; 1147 usbd_xfer_set_frame_offset(xfer, nframes * MCLBYTES, 1148 nframes); 1149 frm_len = 0; 1150 pc = usbd_xfer_get_frame(xfer, nframes); 1151 1152 /* Each frame is prefixed with two 32-bit values describing the 1153 * length of the packet and buffer. 1154 */ 1155 txhdr = SMSC_TX_CTRL_0_BUF_SIZE(m->m_pkthdr.len) | 1156 SMSC_TX_CTRL_0_FIRST_SEG | SMSC_TX_CTRL_0_LAST_SEG; 1157 txhdr = htole32(txhdr); 1158 usbd_copy_in(pc, 0, &txhdr, sizeof(txhdr)); 1159 1160 txhdr = SMSC_TX_CTRL_1_PKT_LENGTH(m->m_pkthdr.len); 1161 txhdr = htole32(txhdr); 1162 usbd_copy_in(pc, 4, &txhdr, sizeof(txhdr)); 1163 1164 frm_len += 8; 1165 1166 /* Next copy in the actual packet */ 1167 usbd_m_copy_in(pc, frm_len, m, 0, m->m_pkthdr.len); 1168 frm_len += m->m_pkthdr.len; 1169 1170 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1171 1172 /* If there's a BPF listener, bounce a copy of this frame to him */ 1173 BPF_MTAP(ifp, m); 1174 1175 m_freem(m); 1176 1177 /* Set frame length. */ 1178 usbd_xfer_set_frame_len(xfer, nframes, frm_len); 1179 } 1180 if (nframes != 0) { 1181 usbd_xfer_set_frames(xfer, nframes); 1182 usbd_transfer_submit(xfer); 1183 ifp->if_drv_flags |= IFF_DRV_OACTIVE; 1184 } 1185 return; 1186 1187 default: 1188 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1189 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; 1190 1191 if (error != USB_ERR_CANCELLED) { 1192 smsc_err_printf(sc, "usb error on tx: %s\n", usbd_errstr(error)); 1193 usbd_xfer_set_stall(xfer); 1194 goto tr_setup; 1195 } 1196 return; 1197 } 1198 } 1199 1200 /** 1201 * smsc_tick - Called periodically to monitor the state of the LAN95xx chip 1202 * @ue: USB ether interface 1203 * 1204 * Simply calls the mii status functions to check the state of the link. 1205 * 1206 * LOCKING: 1207 * Should be called with the SMSC lock held. 1208 */ 1209 static void 1210 smsc_tick(struct usb_ether *ue) 1211 { 1212 struct smsc_softc *sc = uether_getsc(ue); 1213 struct mii_data *mii = uether_getmii(&sc->sc_ue); 1214 1215 SMSC_LOCK_ASSERT(sc, MA_OWNED); 1216 1217 mii_tick(mii); 1218 if ((sc->sc_flags & SMSC_FLAG_LINK) == 0) { 1219 smsc_miibus_statchg(ue->ue_dev); 1220 if ((sc->sc_flags & SMSC_FLAG_LINK) != 0) 1221 smsc_start(ue); 1222 } 1223 } 1224 1225 /** 1226 * smsc_start - Starts communication with the LAN95xx chip 1227 * @ue: USB ether interface 1228 * 1229 * 1230 * 1231 */ 1232 static void 1233 smsc_start(struct usb_ether *ue) 1234 { 1235 struct smsc_softc *sc = uether_getsc(ue); 1236 1237 /* 1238 * start the USB transfers, if not already started: 1239 */ 1240 usbd_transfer_start(sc->sc_xfer[SMSC_BULK_DT_RD]); 1241 usbd_transfer_start(sc->sc_xfer[SMSC_BULK_DT_WR]); 1242 } 1243 1244 /** 1245 * smsc_stop - Stops communication with the LAN95xx chip 1246 * @ue: USB ether interface 1247 * 1248 * 1249 * 1250 */ 1251 static void 1252 smsc_stop(struct usb_ether *ue) 1253 { 1254 struct smsc_softc *sc = uether_getsc(ue); 1255 struct ifnet *ifp = uether_getifp(ue); 1256 1257 SMSC_LOCK_ASSERT(sc, MA_OWNED); 1258 1259 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 1260 sc->sc_flags &= ~SMSC_FLAG_LINK; 1261 1262 /* 1263 * stop all the transfers, if not already stopped: 1264 */ 1265 usbd_transfer_stop(sc->sc_xfer[SMSC_BULK_DT_WR]); 1266 usbd_transfer_stop(sc->sc_xfer[SMSC_BULK_DT_RD]); 1267 } 1268 1269 /** 1270 * smsc_phy_init - Initialises the in-built SMSC phy 1271 * @sc: driver soft context 1272 * 1273 * Resets the PHY part of the chip and then initialises it to default 1274 * values. The 'link down' and 'auto-negotiation complete' interrupts 1275 * from the PHY are also enabled, however we don't monitor the interrupt 1276 * endpoints for the moment. 1277 * 1278 * RETURNS: 1279 * Returns 0 on success or EIO if failed to reset the PHY. 1280 */ 1281 static int 1282 smsc_phy_init(struct smsc_softc *sc) 1283 { 1284 int bmcr; 1285 usb_ticks_t start_ticks; 1286 const usb_ticks_t max_ticks = USB_MS_TO_TICKS(1000); 1287 1288 SMSC_LOCK_ASSERT(sc, MA_OWNED); 1289 1290 /* Reset phy and wait for reset to complete */ 1291 smsc_miibus_writereg(sc->sc_ue.ue_dev, sc->sc_phyno, MII_BMCR, BMCR_RESET); 1292 1293 start_ticks = ticks; 1294 do { 1295 uether_pause(&sc->sc_ue, hz / 100); 1296 bmcr = smsc_miibus_readreg(sc->sc_ue.ue_dev, sc->sc_phyno, MII_BMCR); 1297 } while ((bmcr & BMCR_RESET) && ((ticks - start_ticks) < max_ticks)); 1298 1299 if (((usb_ticks_t)(ticks - start_ticks)) >= max_ticks) { 1300 smsc_err_printf(sc, "PHY reset timed-out"); 1301 return (EIO); 1302 } 1303 1304 smsc_miibus_writereg(sc->sc_ue.ue_dev, sc->sc_phyno, MII_ANAR, 1305 ANAR_10 | ANAR_10_FD | ANAR_TX | ANAR_TX_FD | /* all modes */ 1306 ANAR_CSMA | 1307 ANAR_FC | 1308 ANAR_PAUSE_ASYM); 1309 1310 /* Setup the phy to interrupt when the link goes down or autoneg completes */ 1311 smsc_miibus_readreg(sc->sc_ue.ue_dev, sc->sc_phyno, SMSC_PHY_INTR_STAT); 1312 smsc_miibus_writereg(sc->sc_ue.ue_dev, sc->sc_phyno, SMSC_PHY_INTR_MASK, 1313 (SMSC_PHY_INTR_ANEG_COMP | SMSC_PHY_INTR_LINK_DOWN)); 1314 1315 /* Restart auto-negotiation */ 1316 bmcr = smsc_miibus_readreg(sc->sc_ue.ue_dev, sc->sc_phyno, MII_BMCR); 1317 bmcr |= BMCR_STARTNEG; 1318 smsc_miibus_writereg(sc->sc_ue.ue_dev, sc->sc_phyno, MII_BMCR, bmcr); 1319 1320 return (0); 1321 } 1322 1323 /** 1324 * smsc_chip_init - Initialises the chip after power on 1325 * @sc: driver soft context 1326 * 1327 * This initialisation sequence is modelled on the procedure in the Linux 1328 * driver. 1329 * 1330 * RETURNS: 1331 * Returns 0 on success or an error code on failure. 1332 */ 1333 static int 1334 smsc_chip_init(struct smsc_softc *sc) 1335 { 1336 int err; 1337 int locked; 1338 uint32_t reg_val; 1339 int burst_cap; 1340 1341 locked = mtx_owned(&sc->sc_mtx); 1342 if (!locked) 1343 SMSC_LOCK(sc); 1344 1345 /* Enter H/W config mode */ 1346 smsc_write_reg(sc, SMSC_HW_CFG, SMSC_HW_CFG_LRST); 1347 1348 if ((err = smsc_wait_for_bits(sc, SMSC_HW_CFG, SMSC_HW_CFG_LRST)) != 0) { 1349 smsc_warn_printf(sc, "timed-out waiting for reset to complete\n"); 1350 goto init_failed; 1351 } 1352 1353 /* Reset the PHY */ 1354 smsc_write_reg(sc, SMSC_PM_CTRL, SMSC_PM_CTRL_PHY_RST); 1355 1356 if ((err = smsc_wait_for_bits(sc, SMSC_PM_CTRL, SMSC_PM_CTRL_PHY_RST)) != 0) { 1357 smsc_warn_printf(sc, "timed-out waiting for phy reset to complete\n"); 1358 goto init_failed; 1359 } 1360 1361 /* Set the mac address */ 1362 if ((err = smsc_setmacaddress(sc, sc->sc_ue.ue_eaddr)) != 0) { 1363 smsc_warn_printf(sc, "failed to set the MAC address\n"); 1364 goto init_failed; 1365 } 1366 1367 /* Don't know what the HW_CFG_BIR bit is, but following the reset sequence 1368 * as used in the Linux driver. 1369 */ 1370 if ((err = smsc_read_reg(sc, SMSC_HW_CFG, ®_val)) != 0) { 1371 smsc_warn_printf(sc, "failed to read HW_CFG: %d\n", err); 1372 goto init_failed; 1373 } 1374 reg_val |= SMSC_HW_CFG_BIR; 1375 smsc_write_reg(sc, SMSC_HW_CFG, reg_val); 1376 1377 /* There is a so called 'turbo mode' that the linux driver supports, it 1378 * seems to allow you to jam multiple frames per Rx transaction. By default 1379 * this driver supports that and therefore allows multiple frames per URB. 1380 * 1381 * The xfer buffer size needs to reflect this as well, therefore based on 1382 * the calculations in the Linux driver the RX bufsize is set to 18944, 1383 * bufsz = (16 * 1024 + 5 * 512) 1384 * 1385 * Burst capability is the number of URBs that can be in a burst of data/ 1386 * ethernet frames. 1387 */ 1388 if (!smsc_rx_packet_batching) 1389 burst_cap = 0; 1390 else if (usbd_get_speed(sc->sc_ue.ue_udev) == USB_SPEED_HIGH) 1391 burst_cap = 37; 1392 else 1393 burst_cap = 128; 1394 1395 smsc_write_reg(sc, SMSC_BURST_CAP, burst_cap); 1396 1397 /* Set the default bulk in delay (magic value from Linux driver) */ 1398 smsc_write_reg(sc, SMSC_BULK_IN_DLY, 0x00002000); 1399 1400 /* 1401 * Initialise the RX interface 1402 */ 1403 if ((err = smsc_read_reg(sc, SMSC_HW_CFG, ®_val)) < 0) { 1404 smsc_warn_printf(sc, "failed to read HW_CFG: (err = %d)\n", err); 1405 goto init_failed; 1406 } 1407 1408 /* Adjust the packet offset in the buffer (designed to try and align IP 1409 * header on 4 byte boundary) 1410 */ 1411 reg_val &= ~SMSC_HW_CFG_RXDOFF; 1412 reg_val |= (ETHER_ALIGN << 9) & SMSC_HW_CFG_RXDOFF; 1413 1414 /* The following settings are used for 'turbo mode', a.k.a multiple frames 1415 * per Rx transaction (again info taken form Linux driver). 1416 */ 1417 if (smsc_rx_packet_batching) 1418 reg_val |= (SMSC_HW_CFG_MEF | SMSC_HW_CFG_BCE); 1419 1420 smsc_write_reg(sc, SMSC_HW_CFG, reg_val); 1421 1422 /* Clear the status register ? */ 1423 smsc_write_reg(sc, SMSC_INTR_STATUS, 0xffffffff); 1424 1425 /* Read and display the revision register */ 1426 if ((err = smsc_read_reg(sc, SMSC_ID_REV, &sc->sc_rev_id)) < 0) { 1427 smsc_warn_printf(sc, "failed to read ID_REV (err = %d)\n", err); 1428 goto init_failed; 1429 } 1430 1431 device_printf(sc->sc_ue.ue_dev, "chip 0x%04lx, rev. %04lx\n", 1432 (sc->sc_rev_id & SMSC_ID_REV_CHIP_ID_MASK) >> 16, 1433 (sc->sc_rev_id & SMSC_ID_REV_CHIP_REV_MASK)); 1434 1435 /* GPIO/LED setup */ 1436 reg_val = SMSC_LED_GPIO_CFG_SPD_LED | SMSC_LED_GPIO_CFG_LNK_LED | 1437 SMSC_LED_GPIO_CFG_FDX_LED; 1438 smsc_write_reg(sc, SMSC_LED_GPIO_CFG, reg_val); 1439 1440 /* 1441 * Initialise the TX interface 1442 */ 1443 smsc_write_reg(sc, SMSC_FLOW, 0); 1444 1445 smsc_write_reg(sc, SMSC_AFC_CFG, AFC_CFG_DEFAULT); 1446 1447 /* Read the current MAC configuration */ 1448 if ((err = smsc_read_reg(sc, SMSC_MAC_CSR, &sc->sc_mac_csr)) < 0) { 1449 smsc_warn_printf(sc, "failed to read MAC_CSR (err=%d)\n", err); 1450 goto init_failed; 1451 } 1452 1453 /* Vlan */ 1454 smsc_write_reg(sc, SMSC_VLAN1, (uint32_t)ETHERTYPE_VLAN); 1455 1456 /* 1457 * Initialise the PHY 1458 */ 1459 if ((err = smsc_phy_init(sc)) != 0) 1460 goto init_failed; 1461 1462 /* 1463 * Start TX 1464 */ 1465 sc->sc_mac_csr |= SMSC_MAC_CSR_TXEN; 1466 smsc_write_reg(sc, SMSC_MAC_CSR, sc->sc_mac_csr); 1467 smsc_write_reg(sc, SMSC_TX_CFG, SMSC_TX_CFG_ON); 1468 1469 /* 1470 * Start RX 1471 */ 1472 sc->sc_mac_csr |= SMSC_MAC_CSR_RXEN; 1473 smsc_write_reg(sc, SMSC_MAC_CSR, sc->sc_mac_csr); 1474 1475 if (!locked) 1476 SMSC_UNLOCK(sc); 1477 1478 return (0); 1479 1480 init_failed: 1481 if (!locked) 1482 SMSC_UNLOCK(sc); 1483 1484 smsc_err_printf(sc, "smsc_chip_init failed (err=%d)\n", err); 1485 return (err); 1486 } 1487 1488 /** 1489 * smsc_ioctl - ioctl function for the device 1490 * @ifp: interface pointer 1491 * @cmd: the ioctl command 1492 * @data: data passed in the ioctl call, typically a pointer to struct ifreq. 1493 * 1494 * The ioctl routine is overridden to detect change requests for the H/W 1495 * checksum capabilities. 1496 * 1497 * RETURNS: 1498 * 0 on success and an error code on failure. 1499 */ 1500 static int 1501 smsc_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1502 { 1503 struct usb_ether *ue = ifp->if_softc; 1504 struct smsc_softc *sc; 1505 struct ifreq *ifr; 1506 int rc; 1507 int mask; 1508 int reinit; 1509 1510 if (cmd == SIOCSIFCAP) { 1511 sc = uether_getsc(ue); 1512 ifr = (struct ifreq *)data; 1513 1514 SMSC_LOCK(sc); 1515 1516 rc = 0; 1517 reinit = 0; 1518 1519 mask = ifr->ifr_reqcap ^ ifp->if_capenable; 1520 1521 /* Modify the RX CSUM enable bits */ 1522 if ((mask & IFCAP_RXCSUM) != 0 && 1523 (ifp->if_capabilities & IFCAP_RXCSUM) != 0) { 1524 ifp->if_capenable ^= IFCAP_RXCSUM; 1525 1526 if (ifp->if_drv_flags & IFF_DRV_RUNNING) { 1527 ifp->if_drv_flags &= ~IFF_DRV_RUNNING; 1528 reinit = 1; 1529 } 1530 } 1531 1532 SMSC_UNLOCK(sc); 1533 if (reinit) 1534 uether_init(ue); 1535 1536 } else { 1537 rc = uether_ioctl(ifp, cmd, data); 1538 } 1539 1540 return (rc); 1541 } 1542 1543 /** 1544 * smsc_attach_post - Called after the driver attached to the USB interface 1545 * @ue: the USB ethernet device 1546 * 1547 * This is where the chip is intialised for the first time. This is different 1548 * from the smsc_init() function in that that one is designed to setup the 1549 * H/W to match the UE settings and can be called after a reset. 1550 * 1551 * 1552 */ 1553 static void 1554 smsc_attach_post(struct usb_ether *ue) 1555 { 1556 struct smsc_softc *sc = uether_getsc(ue); 1557 uint32_t mac_h, mac_l; 1558 int err; 1559 1560 smsc_dbg_printf(sc, "smsc_attach_post\n"); 1561 1562 /* Setup some of the basics */ 1563 sc->sc_phyno = 1; 1564 1565 /* Attempt to get the mac address, if an EEPROM is not attached this 1566 * will just return FF:FF:FF:FF:FF:FF, so in such cases we invent a MAC 1567 * address based on urandom. 1568 */ 1569 memset(sc->sc_ue.ue_eaddr, 0xff, ETHER_ADDR_LEN); 1570 1571 /* Check if there is already a MAC address in the register */ 1572 if ((smsc_read_reg(sc, SMSC_MAC_ADDRL, &mac_l) == 0) && 1573 (smsc_read_reg(sc, SMSC_MAC_ADDRH, &mac_h) == 0)) { 1574 sc->sc_ue.ue_eaddr[5] = (uint8_t)((mac_h >> 8) & 0xff); 1575 sc->sc_ue.ue_eaddr[4] = (uint8_t)((mac_h) & 0xff); 1576 sc->sc_ue.ue_eaddr[3] = (uint8_t)((mac_l >> 24) & 0xff); 1577 sc->sc_ue.ue_eaddr[2] = (uint8_t)((mac_l >> 16) & 0xff); 1578 sc->sc_ue.ue_eaddr[1] = (uint8_t)((mac_l >> 8) & 0xff); 1579 sc->sc_ue.ue_eaddr[0] = (uint8_t)((mac_l) & 0xff); 1580 } 1581 1582 /* MAC address is not set so try to read from EEPROM, if that fails generate 1583 * a random MAC address. 1584 */ 1585 if (!ETHER_IS_VALID(sc->sc_ue.ue_eaddr)) { 1586 err = smsc_eeprom_read(sc, 0x01, sc->sc_ue.ue_eaddr, ETHER_ADDR_LEN); 1587 #ifdef FDT 1588 if ((err != 0) || (!ETHER_IS_VALID(sc->sc_ue.ue_eaddr))) 1589 err = usb_fdt_get_mac_addr(sc->sc_ue.ue_dev, &sc->sc_ue); 1590 #endif 1591 if ((err != 0) || (!ETHER_IS_VALID(sc->sc_ue.ue_eaddr))) { 1592 read_random(sc->sc_ue.ue_eaddr, ETHER_ADDR_LEN); 1593 sc->sc_ue.ue_eaddr[0] &= ~0x01; /* unicast */ 1594 sc->sc_ue.ue_eaddr[0] |= 0x02; /* locally administered */ 1595 } 1596 } 1597 1598 /* Initialise the chip for the first time */ 1599 smsc_chip_init(sc); 1600 } 1601 1602 /** 1603 * smsc_attach_post_sub - Called after the driver attached to the USB interface 1604 * @ue: the USB ethernet device 1605 * 1606 * Most of this is boilerplate code and copied from the base USB ethernet 1607 * driver. It has been overridden so that we can indicate to the system that 1608 * the chip supports H/W checksumming. 1609 * 1610 * RETURNS: 1611 * Returns 0 on success or a negative error code. 1612 */ 1613 static int 1614 smsc_attach_post_sub(struct usb_ether *ue) 1615 { 1616 struct smsc_softc *sc; 1617 struct ifnet *ifp; 1618 int error; 1619 1620 sc = uether_getsc(ue); 1621 ifp = ue->ue_ifp; 1622 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; 1623 ifp->if_start = uether_start; 1624 ifp->if_ioctl = smsc_ioctl; 1625 ifp->if_init = uether_init; 1626 IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); 1627 ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; 1628 IFQ_SET_READY(&ifp->if_snd); 1629 1630 /* The chip supports TCP/UDP checksum offloading on TX and RX paths, however 1631 * currently only RX checksum is supported in the driver (see top of file). 1632 */ 1633 ifp->if_capabilities |= IFCAP_RXCSUM | IFCAP_VLAN_MTU; 1634 ifp->if_hwassist = 0; 1635 1636 /* TX checksuming is disabled (for now?) 1637 ifp->if_capabilities |= IFCAP_TXCSUM; 1638 ifp->if_capenable |= IFCAP_TXCSUM; 1639 ifp->if_hwassist = CSUM_TCP | CSUM_UDP; 1640 */ 1641 1642 ifp->if_capenable = ifp->if_capabilities; 1643 1644 bus_topo_lock(); 1645 error = mii_attach(ue->ue_dev, &ue->ue_miibus, ifp, 1646 uether_ifmedia_upd, ue->ue_methods->ue_mii_sts, 1647 BMSR_DEFCAPMASK, sc->sc_phyno, MII_OFFSET_ANY, 0); 1648 bus_topo_unlock(); 1649 1650 return (error); 1651 } 1652 1653 /** 1654 * smsc_probe - Probe the interface. 1655 * @dev: smsc device handle 1656 * 1657 * Checks if the device is a match for this driver. 1658 * 1659 * RETURNS: 1660 * Returns 0 on success or an error code on failure. 1661 */ 1662 static int 1663 smsc_probe(device_t dev) 1664 { 1665 struct usb_attach_arg *uaa = device_get_ivars(dev); 1666 1667 if (uaa->usb_mode != USB_MODE_HOST) 1668 return (ENXIO); 1669 if (uaa->info.bConfigIndex != SMSC_CONFIG_INDEX) 1670 return (ENXIO); 1671 if (uaa->info.bIfaceIndex != SMSC_IFACE_IDX) 1672 return (ENXIO); 1673 1674 return (usbd_lookup_id_by_uaa(smsc_devs, sizeof(smsc_devs), uaa)); 1675 } 1676 1677 /** 1678 * smsc_attach - Attach the interface. 1679 * @dev: smsc device handle 1680 * 1681 * Allocate softc structures, do ifmedia setup and ethernet/BPF attach. 1682 * 1683 * RETURNS: 1684 * Returns 0 on success or a negative error code. 1685 */ 1686 static int 1687 smsc_attach(device_t dev) 1688 { 1689 struct usb_attach_arg *uaa = device_get_ivars(dev); 1690 struct smsc_softc *sc = device_get_softc(dev); 1691 struct usb_ether *ue = &sc->sc_ue; 1692 uint8_t iface_index; 1693 int err; 1694 1695 sc->sc_flags = USB_GET_DRIVER_INFO(uaa); 1696 1697 device_set_usb_desc(dev); 1698 1699 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), NULL, MTX_DEF); 1700 1701 /* Setup the endpoints for the SMSC LAN95xx device(s) */ 1702 iface_index = SMSC_IFACE_IDX; 1703 err = usbd_transfer_setup(uaa->device, &iface_index, sc->sc_xfer, 1704 smsc_config, SMSC_N_TRANSFER, sc, &sc->sc_mtx); 1705 if (err) { 1706 device_printf(dev, "error: allocating USB transfers failed\n"); 1707 goto detach; 1708 } 1709 1710 ue->ue_sc = sc; 1711 ue->ue_dev = dev; 1712 ue->ue_udev = uaa->device; 1713 ue->ue_mtx = &sc->sc_mtx; 1714 ue->ue_methods = &smsc_ue_methods; 1715 1716 err = uether_ifattach(ue); 1717 if (err) { 1718 device_printf(dev, "error: could not attach interface\n"); 1719 goto detach; 1720 } 1721 return (0); /* success */ 1722 1723 detach: 1724 smsc_detach(dev); 1725 return (ENXIO); /* failure */ 1726 } 1727 1728 /** 1729 * smsc_detach - Detach the interface. 1730 * @dev: smsc device handle 1731 * 1732 * RETURNS: 1733 * Returns 0. 1734 */ 1735 static int 1736 smsc_detach(device_t dev) 1737 { 1738 struct smsc_softc *sc = device_get_softc(dev); 1739 struct usb_ether *ue = &sc->sc_ue; 1740 1741 usbd_transfer_unsetup(sc->sc_xfer, SMSC_N_TRANSFER); 1742 uether_ifdetach(ue); 1743 mtx_destroy(&sc->sc_mtx); 1744 1745 return (0); 1746 } 1747 1748 static device_method_t smsc_methods[] = { 1749 /* Device interface */ 1750 DEVMETHOD(device_probe, smsc_probe), 1751 DEVMETHOD(device_attach, smsc_attach), 1752 DEVMETHOD(device_detach, smsc_detach), 1753 1754 /* bus interface */ 1755 DEVMETHOD(bus_print_child, bus_generic_print_child), 1756 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 1757 1758 /* MII interface */ 1759 DEVMETHOD(miibus_readreg, smsc_miibus_readreg), 1760 DEVMETHOD(miibus_writereg, smsc_miibus_writereg), 1761 DEVMETHOD(miibus_statchg, smsc_miibus_statchg), 1762 1763 DEVMETHOD_END 1764 }; 1765 1766 static driver_t smsc_driver = { 1767 .name = "smsc", 1768 .methods = smsc_methods, 1769 .size = sizeof(struct smsc_softc), 1770 }; 1771 1772 DRIVER_MODULE(smsc, uhub, smsc_driver, NULL, NULL); 1773 DRIVER_MODULE(miibus, smsc, miibus_driver, 0, 0); 1774 MODULE_DEPEND(smsc, uether, 1, 1, 1); 1775 MODULE_DEPEND(smsc, usb, 1, 1, 1); 1776 MODULE_DEPEND(smsc, ether, 1, 1, 1); 1777 MODULE_DEPEND(smsc, miibus, 1, 1, 1); 1778 MODULE_VERSION(smsc, 1); 1779 USB_PNP_HOST_INFO(smsc_devs);
Cache object: 19b926921e4b9f27d1cc34c60099bef6
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