1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (C) 2012 Ben Gray <bgray@freebsd.org>. 5 * Copyright (C) 2018 The FreeBSD Foundation. 6 * 7 * This software was developed by Arshan Khanifar <arshankhanifar@gmail.com> 8 * under sponsorship from the FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 /* 34 * USB-To-Ethernet adapter driver for Microchip's LAN78XX and related families. 35 * 36 * USB 3.1 to 10/100/1000 Mbps Ethernet 37 * LAN7800 http://www.microchip.com/wwwproducts/en/LAN7800 38 * 39 * USB 2.0 to 10/100/1000 Mbps Ethernet 40 * LAN7850 http://www.microchip.com/wwwproducts/en/LAN7850 41 * 42 * USB 2 to 10/100/1000 Mbps Ethernet with built-in USB hub 43 * LAN7515 (no datasheet available, but probes and functions as LAN7800) 44 * 45 * This driver is based on the if_smsc driver, with lan78xx-specific 46 * functionality modelled on Microchip's Linux lan78xx driver. 47 * 48 * UNIMPLEMENTED FEATURES 49 * ------------------ 50 * A number of features supported by the lan78xx are not yet implemented in 51 * this driver: 52 * 53 * - TX checksum offloading: Nothing has been implemented yet. 54 * - Direct address translation filtering: Implemented but untested. 55 * - VLAN tag removal. 56 * - Support for USB interrupt endpoints. 57 * - Latency Tolerance Messaging (LTM) support. 58 * - TCP LSO support. 59 * 60 */ 61 62 #include <sys/param.h> 63 #include <sys/bus.h> 64 #include <sys/callout.h> 65 #include <sys/condvar.h> 66 #include <sys/kernel.h> 67 #include <sys/lock.h> 68 #include <sys/malloc.h> 69 #include <sys/module.h> 70 #include <sys/mutex.h> 71 #include <sys/priv.h> 72 #include <sys/queue.h> 73 #include <sys/random.h> 74 #include <sys/socket.h> 75 #include <sys/stddef.h> 76 #include <sys/stdint.h> 77 #include <sys/sx.h> 78 #include <sys/sysctl.h> 79 #include <sys/systm.h> 80 #include <sys/unistd.h> 81 82 #include <net/if.h> 83 #include <net/if_var.h> 84 #include <net/if_media.h> 85 86 #include <dev/mii/mii.h> 87 #include <dev/mii/miivar.h> 88 89 #include <netinet/in.h> 90 #include <netinet/ip.h> 91 92 #include "opt_platform.h" 93 94 #ifdef FDT 95 #include <dev/fdt/fdt_common.h> 96 #include <dev/ofw/ofw_bus.h> 97 #include <dev/ofw/ofw_bus_subr.h> 98 #include <dev/usb/usb_fdt_support.h> 99 #endif 100 101 #include <dev/usb/usb.h> 102 #include <dev/usb/usbdi.h> 103 #include <dev/usb/usbdi_util.h> 104 #include "usbdevs.h" 105 106 #define USB_DEBUG_VAR lan78xx_debug 107 #include <dev/usb/usb_debug.h> 108 #include <dev/usb/usb_process.h> 109 110 #include <dev/usb/net/usb_ethernet.h> 111 112 #include <dev/usb/net/if_mugereg.h> 113 114 #include "miibus_if.h" 115 116 #ifdef USB_DEBUG 117 static int muge_debug = 0; 118 119 SYSCTL_NODE(_hw_usb, OID_AUTO, muge, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 120 "Microchip LAN78xx USB-GigE"); 121 SYSCTL_INT(_hw_usb_muge, OID_AUTO, debug, CTLFLAG_RWTUN, &muge_debug, 0, 122 "Debug level"); 123 #endif 124 125 #define MUGE_DEFAULT_TX_CSUM_ENABLE (false) 126 #define MUGE_DEFAULT_TSO_ENABLE (false) 127 128 /* Supported Vendor and Product IDs. */ 129 static const struct usb_device_id lan78xx_devs[] = { 130 #define MUGE_DEV(p,i) { USB_VPI(USB_VENDOR_SMC2, USB_PRODUCT_SMC2_##p, i) } 131 MUGE_DEV(LAN7800_ETH, 0), 132 MUGE_DEV(LAN7801_ETH, 0), 133 MUGE_DEV(LAN7850_ETH, 0), 134 #undef MUGE_DEV 135 }; 136 137 #ifdef USB_DEBUG 138 #define muge_dbg_printf(sc, fmt, args...) \ 139 do { \ 140 if (muge_debug > 0) \ 141 device_printf((sc)->sc_ue.ue_dev, "debug: " fmt, ##args); \ 142 } while(0) 143 #else 144 #define muge_dbg_printf(sc, fmt, args...) do { } while (0) 145 #endif 146 147 #define muge_warn_printf(sc, fmt, args...) \ 148 device_printf((sc)->sc_ue.ue_dev, "warning: " fmt, ##args) 149 150 #define muge_err_printf(sc, fmt, args...) \ 151 device_printf((sc)->sc_ue.ue_dev, "error: " fmt, ##args) 152 153 #define ETHER_IS_VALID(addr) \ 154 (!ETHER_IS_MULTICAST(addr) && !ETHER_IS_ZERO(addr)) 155 156 /* USB endpoints. */ 157 158 enum { 159 MUGE_BULK_DT_RD, 160 MUGE_BULK_DT_WR, 161 #if 0 /* Ignore interrupt endpoints for now as we poll on MII status. */ 162 MUGE_INTR_DT_WR, 163 MUGE_INTR_DT_RD, 164 #endif 165 MUGE_N_TRANSFER, 166 }; 167 168 struct muge_softc { 169 struct usb_ether sc_ue; 170 struct mtx sc_mtx; 171 struct usb_xfer *sc_xfer[MUGE_N_TRANSFER]; 172 int sc_phyno; 173 uint32_t sc_leds; 174 uint16_t sc_led_modes; 175 uint16_t sc_led_modes_mask; 176 177 /* Settings for the mac control (MAC_CSR) register. */ 178 uint32_t sc_rfe_ctl; 179 uint32_t sc_mdix_ctl; 180 uint16_t chipid; 181 uint16_t chiprev; 182 uint32_t sc_mchash_table[ETH_DP_SEL_VHF_HASH_LEN]; 183 uint32_t sc_pfilter_table[MUGE_NUM_PFILTER_ADDRS_][2]; 184 185 uint32_t sc_flags; 186 #define MUGE_FLAG_LINK 0x0001 187 #define MUGE_FLAG_INIT_DONE 0x0002 188 }; 189 190 #define MUGE_IFACE_IDX 0 191 192 #define MUGE_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 193 #define MUGE_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 194 #define MUGE_LOCK_ASSERT(_sc, t) mtx_assert(&(_sc)->sc_mtx, t) 195 196 static device_probe_t muge_probe; 197 static device_attach_t muge_attach; 198 static device_detach_t muge_detach; 199 200 static usb_callback_t muge_bulk_read_callback; 201 static usb_callback_t muge_bulk_write_callback; 202 203 static miibus_readreg_t lan78xx_miibus_readreg; 204 static miibus_writereg_t lan78xx_miibus_writereg; 205 static miibus_statchg_t lan78xx_miibus_statchg; 206 207 static int muge_attach_post_sub(struct usb_ether *ue); 208 static uether_fn_t muge_attach_post; 209 static uether_fn_t muge_init; 210 static uether_fn_t muge_stop; 211 static uether_fn_t muge_start; 212 static uether_fn_t muge_tick; 213 static uether_fn_t muge_setmulti; 214 static uether_fn_t muge_setpromisc; 215 216 static int muge_ifmedia_upd(if_t); 217 static void muge_ifmedia_sts(if_t, struct ifmediareq *); 218 219 static int lan78xx_chip_init(struct muge_softc *sc); 220 static int muge_ioctl(if_t ifp, u_long cmd, caddr_t data); 221 222 static const struct usb_config muge_config[MUGE_N_TRANSFER] = { 223 [MUGE_BULK_DT_WR] = { 224 .type = UE_BULK, 225 .endpoint = UE_ADDR_ANY, 226 .direction = UE_DIR_OUT, 227 .frames = 16, 228 .bufsize = 16 * (MCLBYTES + 16), 229 .flags = {.pipe_bof = 1,.force_short_xfer = 1,}, 230 .callback = muge_bulk_write_callback, 231 .timeout = 10000, /* 10 seconds */ 232 }, 233 234 [MUGE_BULK_DT_RD] = { 235 .type = UE_BULK, 236 .endpoint = UE_ADDR_ANY, 237 .direction = UE_DIR_IN, 238 .bufsize = 20480, /* bytes */ 239 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 240 .callback = muge_bulk_read_callback, 241 .timeout = 0, /* no timeout */ 242 }, 243 /* 244 * The chip supports interrupt endpoints, however they aren't 245 * needed as we poll on the MII status. 246 */ 247 }; 248 249 static const struct usb_ether_methods muge_ue_methods = { 250 .ue_attach_post = muge_attach_post, 251 .ue_attach_post_sub = muge_attach_post_sub, 252 .ue_start = muge_start, 253 .ue_ioctl = muge_ioctl, 254 .ue_init = muge_init, 255 .ue_stop = muge_stop, 256 .ue_tick = muge_tick, 257 .ue_setmulti = muge_setmulti, 258 .ue_setpromisc = muge_setpromisc, 259 .ue_mii_upd = muge_ifmedia_upd, 260 .ue_mii_sts = muge_ifmedia_sts, 261 }; 262 263 /** 264 * lan78xx_read_reg - Read a 32-bit register on the device 265 * @sc: driver soft context 266 * @off: offset of the register 267 * @data: pointer a value that will be populated with the register value 268 * 269 * LOCKING: 270 * The device lock must be held before calling this function. 271 * 272 * RETURNS: 273 * 0 on success, a USB_ERR_?? error code on failure. 274 */ 275 static int 276 lan78xx_read_reg(struct muge_softc *sc, uint32_t off, uint32_t *data) 277 { 278 struct usb_device_request req; 279 uint32_t buf; 280 usb_error_t err; 281 282 MUGE_LOCK_ASSERT(sc, MA_OWNED); 283 284 req.bmRequestType = UT_READ_VENDOR_DEVICE; 285 req.bRequest = UVR_READ_REG; 286 USETW(req.wValue, 0); 287 USETW(req.wIndex, off); 288 USETW(req.wLength, 4); 289 290 err = uether_do_request(&sc->sc_ue, &req, &buf, 1000); 291 if (err != 0) 292 muge_warn_printf(sc, "Failed to read register 0x%0x\n", off); 293 *data = le32toh(buf); 294 return (err); 295 } 296 297 /** 298 * lan78xx_write_reg - Write a 32-bit register on the device 299 * @sc: driver soft context 300 * @off: offset of the register 301 * @data: the 32-bit value to write into the register 302 * 303 * LOCKING: 304 * The device lock must be held before calling this function. 305 * 306 * RETURNS: 307 * 0 on success, a USB_ERR_?? error code on failure. 308 */ 309 static int 310 lan78xx_write_reg(struct muge_softc *sc, uint32_t off, uint32_t data) 311 { 312 struct usb_device_request req; 313 uint32_t buf; 314 usb_error_t err; 315 316 MUGE_LOCK_ASSERT(sc, MA_OWNED); 317 318 buf = htole32(data); 319 320 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 321 req.bRequest = UVR_WRITE_REG; 322 USETW(req.wValue, 0); 323 USETW(req.wIndex, off); 324 USETW(req.wLength, 4); 325 326 err = uether_do_request(&sc->sc_ue, &req, &buf, 1000); 327 if (err != 0) 328 muge_warn_printf(sc, "Failed to write register 0x%0x\n", off); 329 return (err); 330 } 331 332 /** 333 * lan78xx_wait_for_bits - Poll on a register value until bits are cleared 334 * @sc: soft context 335 * @reg: offset of the register 336 * @bits: if the bits are clear the function returns 337 * 338 * LOCKING: 339 * The device lock must be held before calling this function. 340 * 341 * RETURNS: 342 * 0 on success, or a USB_ERR_?? error code on failure. 343 */ 344 static int 345 lan78xx_wait_for_bits(struct muge_softc *sc, uint32_t reg, uint32_t bits) 346 { 347 usb_ticks_t start_ticks; 348 const usb_ticks_t max_ticks = USB_MS_TO_TICKS(1000); 349 uint32_t val; 350 int err; 351 352 MUGE_LOCK_ASSERT(sc, MA_OWNED); 353 354 start_ticks = (usb_ticks_t)ticks; 355 do { 356 if ((err = lan78xx_read_reg(sc, reg, &val)) != 0) 357 return (err); 358 if (!(val & bits)) 359 return (0); 360 uether_pause(&sc->sc_ue, hz / 100); 361 } while (((usb_ticks_t)(ticks - start_ticks)) < max_ticks); 362 363 return (USB_ERR_TIMEOUT); 364 } 365 366 /** 367 * lan78xx_eeprom_read_raw - Read the attached EEPROM 368 * @sc: soft context 369 * @off: the eeprom address offset 370 * @buf: stores the bytes 371 * @buflen: the number of bytes to read 372 * 373 * Simply reads bytes from an attached eeprom. 374 * 375 * LOCKING: 376 * The function takes and releases the device lock if not already held. 377 * 378 * RETURNS: 379 * 0 on success, or a USB_ERR_?? error code on failure. 380 */ 381 static int 382 lan78xx_eeprom_read_raw(struct muge_softc *sc, uint16_t off, uint8_t *buf, 383 uint16_t buflen) 384 { 385 usb_ticks_t start_ticks; 386 const usb_ticks_t max_ticks = USB_MS_TO_TICKS(1000); 387 int err; 388 uint32_t val, saved; 389 uint16_t i; 390 bool locked; 391 392 locked = mtx_owned(&sc->sc_mtx); /* XXX */ 393 if (!locked) 394 MUGE_LOCK(sc); 395 396 if (sc->chipid == ETH_ID_REV_CHIP_ID_7800_) { 397 /* EEDO/EECLK muxed with LED0/LED1 on LAN7800. */ 398 err = lan78xx_read_reg(sc, ETH_HW_CFG, &val); 399 saved = val; 400 401 val &= ~(ETH_HW_CFG_LEDO_EN_ | ETH_HW_CFG_LED1_EN_); 402 err = lan78xx_write_reg(sc, ETH_HW_CFG, val); 403 } 404 405 err = lan78xx_wait_for_bits(sc, ETH_E2P_CMD, ETH_E2P_CMD_BUSY_); 406 if (err != 0) { 407 muge_warn_printf(sc, "eeprom busy, failed to read data\n"); 408 goto done; 409 } 410 411 /* Start reading the bytes, one at a time. */ 412 for (i = 0; i < buflen; i++) { 413 val = ETH_E2P_CMD_BUSY_ | ETH_E2P_CMD_READ_; 414 val |= (ETH_E2P_CMD_ADDR_MASK_ & (off + i)); 415 if ((err = lan78xx_write_reg(sc, ETH_E2P_CMD, val)) != 0) 416 goto done; 417 418 start_ticks = (usb_ticks_t)ticks; 419 do { 420 if ((err = lan78xx_read_reg(sc, ETH_E2P_CMD, &val)) != 421 0) 422 goto done; 423 if (!(val & ETH_E2P_CMD_BUSY_) || 424 (val & ETH_E2P_CMD_TIMEOUT_)) 425 break; 426 427 uether_pause(&sc->sc_ue, hz / 100); 428 } while (((usb_ticks_t)(ticks - start_ticks)) < max_ticks); 429 430 if (val & (ETH_E2P_CMD_BUSY_ | ETH_E2P_CMD_TIMEOUT_)) { 431 muge_warn_printf(sc, "eeprom command failed\n"); 432 err = USB_ERR_IOERROR; 433 break; 434 } 435 436 if ((err = lan78xx_read_reg(sc, ETH_E2P_DATA, &val)) != 0) 437 goto done; 438 439 buf[i] = (val & 0xff); 440 } 441 442 done: 443 if (!locked) 444 MUGE_UNLOCK(sc); 445 if (sc->chipid == ETH_ID_REV_CHIP_ID_7800_) { 446 /* Restore saved LED configuration. */ 447 lan78xx_write_reg(sc, ETH_HW_CFG, saved); 448 } 449 return (err); 450 } 451 452 static bool 453 lan78xx_eeprom_present(struct muge_softc *sc) 454 { 455 int ret; 456 uint8_t sig; 457 458 ret = lan78xx_eeprom_read_raw(sc, ETH_E2P_INDICATOR_OFFSET, &sig, 1); 459 return (ret == 0 && sig == ETH_E2P_INDICATOR); 460 } 461 462 /** 463 * lan78xx_otp_read_raw 464 * @sc: soft context 465 * @off: the otp address offset 466 * @buf: stores the bytes 467 * @buflen: the number of bytes to read 468 * 469 * Simply reads bytes from the OTP. 470 * 471 * LOCKING: 472 * The function takes and releases the device lock if not already held. 473 * 474 * RETURNS: 475 * 0 on success, or a USB_ERR_?? error code on failure. 476 * 477 */ 478 static int 479 lan78xx_otp_read_raw(struct muge_softc *sc, uint16_t off, uint8_t *buf, 480 uint16_t buflen) 481 { 482 int err; 483 uint32_t val; 484 uint16_t i; 485 bool locked; 486 locked = mtx_owned(&sc->sc_mtx); 487 if (!locked) 488 MUGE_LOCK(sc); 489 490 err = lan78xx_read_reg(sc, OTP_PWR_DN, &val); 491 492 /* Checking if bit is set. */ 493 if (val & OTP_PWR_DN_PWRDN_N) { 494 /* Clear it, then wait for it to be cleared. */ 495 lan78xx_write_reg(sc, OTP_PWR_DN, 0); 496 err = lan78xx_wait_for_bits(sc, OTP_PWR_DN, OTP_PWR_DN_PWRDN_N); 497 if (err != 0) { 498 muge_warn_printf(sc, "OTP off? failed to read data\n"); 499 goto done; 500 } 501 } 502 /* Start reading the bytes, one at a time. */ 503 for (i = 0; i < buflen; i++) { 504 err = lan78xx_write_reg(sc, OTP_ADDR1, 505 ((off + i) >> 8) & OTP_ADDR1_15_11); 506 err = lan78xx_write_reg(sc, OTP_ADDR2, 507 ((off + i) & OTP_ADDR2_10_3)); 508 err = lan78xx_write_reg(sc, OTP_FUNC_CMD, OTP_FUNC_CMD_READ_); 509 err = lan78xx_write_reg(sc, OTP_CMD_GO, OTP_CMD_GO_GO_); 510 511 err = lan78xx_wait_for_bits(sc, OTP_STATUS, OTP_STATUS_BUSY_); 512 if (err != 0) { 513 muge_warn_printf(sc, "OTP busy failed to read data\n"); 514 goto done; 515 } 516 517 if ((err = lan78xx_read_reg(sc, OTP_RD_DATA, &val)) != 0) 518 goto done; 519 520 buf[i] = (uint8_t)(val & 0xff); 521 } 522 523 done: 524 if (!locked) 525 MUGE_UNLOCK(sc); 526 return (err); 527 } 528 529 /** 530 * lan78xx_otp_read 531 * @sc: soft context 532 * @off: the otp address offset 533 * @buf: stores the bytes 534 * @buflen: the number of bytes to read 535 * 536 * Simply reads bytes from the otp. 537 * 538 * LOCKING: 539 * The function takes and releases device lock if it is not already held. 540 * 541 * RETURNS: 542 * 0 on success, or a USB_ERR_?? error code on failure. 543 */ 544 static int 545 lan78xx_otp_read(struct muge_softc *sc, uint16_t off, uint8_t *buf, 546 uint16_t buflen) 547 { 548 uint8_t sig; 549 int err; 550 551 err = lan78xx_otp_read_raw(sc, OTP_INDICATOR_OFFSET, &sig, 1); 552 if (err == 0) { 553 if (sig == OTP_INDICATOR_1) { 554 } else if (sig == OTP_INDICATOR_2) { 555 off += 0x100; /* XXX */ 556 } else { 557 err = -EINVAL; 558 } 559 if (!err) 560 err = lan78xx_otp_read_raw(sc, off, buf, buflen); 561 } 562 return (err); 563 } 564 565 /** 566 * lan78xx_setmacaddress - Set the mac address in the device 567 * @sc: driver soft context 568 * @addr: pointer to array contain at least 6 bytes of the mac 569 * 570 * LOCKING: 571 * Should be called with the MUGE lock held. 572 * 573 * RETURNS: 574 * Returns 0 on success or a negative error code. 575 */ 576 static int 577 lan78xx_setmacaddress(struct muge_softc *sc, const uint8_t *addr) 578 { 579 int err; 580 uint32_t val; 581 582 muge_dbg_printf(sc, 583 "setting mac address to %02x:%02x:%02x:%02x:%02x:%02x\n", 584 addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]); 585 586 MUGE_LOCK_ASSERT(sc, MA_OWNED); 587 588 val = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0]; 589 if ((err = lan78xx_write_reg(sc, ETH_RX_ADDRL, val)) != 0) 590 goto done; 591 592 val = (addr[5] << 8) | addr[4]; 593 err = lan78xx_write_reg(sc, ETH_RX_ADDRH, val); 594 595 done: 596 return (err); 597 } 598 599 /** 600 * lan78xx_set_rx_max_frame_length 601 * @sc: driver soft context 602 * @size: pointer to array contain at least 6 bytes of the mac 603 * 604 * Sets the maximum frame length to be received. Frames bigger than 605 * this size are aborted. 606 * 607 * RETURNS: 608 * Returns 0 on success or a negative error code. 609 */ 610 static int 611 lan78xx_set_rx_max_frame_length(struct muge_softc *sc, int size) 612 { 613 uint32_t buf; 614 bool rxenabled; 615 616 /* First we have to disable rx before changing the length. */ 617 lan78xx_read_reg(sc, ETH_MAC_RX, &buf); 618 rxenabled = ((buf & ETH_MAC_RX_EN_) != 0); 619 620 if (rxenabled) { 621 buf &= ~ETH_MAC_RX_EN_; 622 lan78xx_write_reg(sc, ETH_MAC_RX, buf); 623 } 624 625 /* Setting max frame length. */ 626 buf &= ~ETH_MAC_RX_MAX_FR_SIZE_MASK_; 627 buf |= (((size + 4) << ETH_MAC_RX_MAX_FR_SIZE_SHIFT_) & 628 ETH_MAC_RX_MAX_FR_SIZE_MASK_); 629 lan78xx_write_reg(sc, ETH_MAC_RX, buf); 630 631 /* If it were enabled before, we enable it back. */ 632 633 if (rxenabled) { 634 buf |= ETH_MAC_RX_EN_; 635 lan78xx_write_reg(sc, ETH_MAC_RX, buf); 636 } 637 638 return (0); 639 } 640 641 /** 642 * lan78xx_miibus_readreg - Read a MII/MDIO register 643 * @dev: usb ether device 644 * @phy: the number of phy reading from 645 * @reg: the register address 646 * 647 * LOCKING: 648 * Takes and releases the device mutex lock if not already held. 649 * 650 * RETURNS: 651 * Returns the 16-bits read from the MII register, if this function fails 652 * 0 is returned. 653 */ 654 static int 655 lan78xx_miibus_readreg(device_t dev, int phy, int reg) 656 { 657 struct muge_softc *sc = device_get_softc(dev); 658 uint32_t addr, val; 659 bool locked; 660 661 val = 0; 662 locked = mtx_owned(&sc->sc_mtx); 663 if (!locked) 664 MUGE_LOCK(sc); 665 666 if (lan78xx_wait_for_bits(sc, ETH_MII_ACC, ETH_MII_ACC_MII_BUSY_) != 667 0) { 668 muge_warn_printf(sc, "MII is busy\n"); 669 goto done; 670 } 671 672 addr = (phy << 11) | (reg << 6) | 673 ETH_MII_ACC_MII_READ_ | ETH_MII_ACC_MII_BUSY_; 674 lan78xx_write_reg(sc, ETH_MII_ACC, addr); 675 676 if (lan78xx_wait_for_bits(sc, ETH_MII_ACC, ETH_MII_ACC_MII_BUSY_) != 677 0) { 678 muge_warn_printf(sc, "MII read timeout\n"); 679 goto done; 680 } 681 682 lan78xx_read_reg(sc, ETH_MII_DATA, &val); 683 val = le32toh(val); 684 685 done: 686 if (!locked) 687 MUGE_UNLOCK(sc); 688 689 return (val & 0xFFFF); 690 } 691 692 /** 693 * lan78xx_miibus_writereg - Writes a MII/MDIO register 694 * @dev: usb ether device 695 * @phy: the number of phy writing to 696 * @reg: the register address 697 * @val: the value to write 698 * 699 * Attempts to write a PHY register through the usb controller registers. 700 * 701 * LOCKING: 702 * Takes and releases the device mutex lock if not already held. 703 * 704 * RETURNS: 705 * Always returns 0 regardless of success or failure. 706 */ 707 static int 708 lan78xx_miibus_writereg(device_t dev, int phy, int reg, int val) 709 { 710 struct muge_softc *sc = device_get_softc(dev); 711 uint32_t addr; 712 bool locked; 713 714 if (sc->sc_phyno != phy) 715 return (0); 716 717 locked = mtx_owned(&sc->sc_mtx); 718 if (!locked) 719 MUGE_LOCK(sc); 720 721 if (lan78xx_wait_for_bits(sc, ETH_MII_ACC, ETH_MII_ACC_MII_BUSY_) != 722 0) { 723 muge_warn_printf(sc, "MII is busy\n"); 724 goto done; 725 } 726 727 val = htole32(val); 728 lan78xx_write_reg(sc, ETH_MII_DATA, val); 729 730 addr = (phy << 11) | (reg << 6) | 731 ETH_MII_ACC_MII_WRITE_ | ETH_MII_ACC_MII_BUSY_; 732 lan78xx_write_reg(sc, ETH_MII_ACC, addr); 733 734 if (lan78xx_wait_for_bits(sc, ETH_MII_ACC, ETH_MII_ACC_MII_BUSY_) != 0) 735 muge_warn_printf(sc, "MII write timeout\n"); 736 737 done: 738 if (!locked) 739 MUGE_UNLOCK(sc); 740 return (0); 741 } 742 743 /* 744 * lan78xx_miibus_statchg - Called to detect phy status change 745 * @dev: usb ether device 746 * 747 * This function is called periodically by the system to poll for status 748 * changes of the link. 749 * 750 * LOCKING: 751 * Takes and releases the device mutex lock if not already held. 752 */ 753 static void 754 lan78xx_miibus_statchg(device_t dev) 755 { 756 struct muge_softc *sc = device_get_softc(dev); 757 struct mii_data *mii = uether_getmii(&sc->sc_ue); 758 if_t ifp; 759 int err; 760 uint32_t flow = 0; 761 uint32_t fct_flow = 0; 762 bool locked; 763 764 locked = mtx_owned(&sc->sc_mtx); 765 if (!locked) 766 MUGE_LOCK(sc); 767 768 ifp = uether_getifp(&sc->sc_ue); 769 if (mii == NULL || ifp == NULL || 770 (if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0) 771 goto done; 772 773 /* Use the MII status to determine link status */ 774 sc->sc_flags &= ~MUGE_FLAG_LINK; 775 if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) == 776 (IFM_ACTIVE | IFM_AVALID)) { 777 muge_dbg_printf(sc, "media is active\n"); 778 switch (IFM_SUBTYPE(mii->mii_media_active)) { 779 case IFM_10_T: 780 case IFM_100_TX: 781 sc->sc_flags |= MUGE_FLAG_LINK; 782 muge_dbg_printf(sc, "10/100 ethernet\n"); 783 break; 784 case IFM_1000_T: 785 sc->sc_flags |= MUGE_FLAG_LINK; 786 muge_dbg_printf(sc, "Gigabit ethernet\n"); 787 break; 788 default: 789 break; 790 } 791 } 792 /* Lost link, do nothing. */ 793 if ((sc->sc_flags & MUGE_FLAG_LINK) == 0) { 794 muge_dbg_printf(sc, "link flag not set\n"); 795 goto done; 796 } 797 798 err = lan78xx_read_reg(sc, ETH_FCT_FLOW, &fct_flow); 799 if (err) { 800 muge_warn_printf(sc, 801 "failed to read initial flow control thresholds, error %d\n", 802 err); 803 goto done; 804 } 805 806 /* Enable/disable full duplex operation and TX/RX pause. */ 807 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0) { 808 muge_dbg_printf(sc, "full duplex operation\n"); 809 810 /* Enable transmit MAC flow control function. */ 811 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_TXPAUSE) != 0) 812 flow |= ETH_FLOW_CR_TX_FCEN_ | 0xFFFF; 813 814 if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_RXPAUSE) != 0) 815 flow |= ETH_FLOW_CR_RX_FCEN_; 816 } 817 818 /* XXX Flow control settings obtained from Microchip's driver. */ 819 switch(usbd_get_speed(sc->sc_ue.ue_udev)) { 820 case USB_SPEED_SUPER: 821 fct_flow = 0x817; 822 break; 823 case USB_SPEED_HIGH: 824 fct_flow = 0x211; 825 break; 826 default: 827 break; 828 } 829 830 err += lan78xx_write_reg(sc, ETH_FLOW, flow); 831 err += lan78xx_write_reg(sc, ETH_FCT_FLOW, fct_flow); 832 if (err) 833 muge_warn_printf(sc, "media change failed, error %d\n", err); 834 835 done: 836 if (!locked) 837 MUGE_UNLOCK(sc); 838 } 839 840 /* 841 * lan78xx_set_mdix_auto - Configure the device to enable automatic 842 * crossover and polarity detection. LAN7800 provides HP Auto-MDIX 843 * functionality for seamless crossover and polarity detection. 844 * 845 * @sc: driver soft context 846 * 847 * LOCKING: 848 * Takes and releases the device mutex lock if not already held. 849 */ 850 static void 851 lan78xx_set_mdix_auto(struct muge_softc *sc) 852 { 853 uint32_t buf, err; 854 855 err = lan78xx_miibus_writereg(sc->sc_ue.ue_dev, sc->sc_phyno, 856 MUGE_EXT_PAGE_ACCESS, MUGE_EXT_PAGE_SPACE_1); 857 858 buf = lan78xx_miibus_readreg(sc->sc_ue.ue_dev, sc->sc_phyno, 859 MUGE_EXT_MODE_CTRL); 860 buf &= ~MUGE_EXT_MODE_CTRL_MDIX_MASK_; 861 buf |= MUGE_EXT_MODE_CTRL_AUTO_MDIX_; 862 863 lan78xx_miibus_readreg(sc->sc_ue.ue_dev, sc->sc_phyno, MII_BMCR); 864 err += lan78xx_miibus_writereg(sc->sc_ue.ue_dev, sc->sc_phyno, 865 MUGE_EXT_MODE_CTRL, buf); 866 867 err += lan78xx_miibus_writereg(sc->sc_ue.ue_dev, sc->sc_phyno, 868 MUGE_EXT_PAGE_ACCESS, MUGE_EXT_PAGE_SPACE_0); 869 870 if (err != 0) 871 muge_warn_printf(sc, "error setting PHY's MDIX status\n"); 872 873 sc->sc_mdix_ctl = buf; 874 } 875 876 /** 877 * lan78xx_phy_init - Initialises the in-built MUGE phy 878 * @sc: driver soft context 879 * 880 * Resets the PHY part of the chip and then initialises it to default 881 * values. The 'link down' and 'auto-negotiation complete' interrupts 882 * from the PHY are also enabled, however we don't monitor the interrupt 883 * endpoints for the moment. 884 * 885 * RETURNS: 886 * Returns 0 on success or EIO if failed to reset the PHY. 887 */ 888 static int 889 lan78xx_phy_init(struct muge_softc *sc) 890 { 891 muge_dbg_printf(sc, "Initializing PHY.\n"); 892 uint16_t bmcr, lmsr; 893 usb_ticks_t start_ticks; 894 uint32_t hw_reg; 895 const usb_ticks_t max_ticks = USB_MS_TO_TICKS(1000); 896 897 MUGE_LOCK_ASSERT(sc, MA_OWNED); 898 899 /* Reset phy and wait for reset to complete. */ 900 lan78xx_miibus_writereg(sc->sc_ue.ue_dev, sc->sc_phyno, MII_BMCR, 901 BMCR_RESET); 902 903 start_ticks = ticks; 904 do { 905 uether_pause(&sc->sc_ue, hz / 100); 906 bmcr = lan78xx_miibus_readreg(sc->sc_ue.ue_dev, sc->sc_phyno, 907 MII_BMCR); 908 } while ((bmcr & BMCR_RESET) && ((ticks - start_ticks) < max_ticks)); 909 910 if (((usb_ticks_t)(ticks - start_ticks)) >= max_ticks) { 911 muge_err_printf(sc, "PHY reset timed-out\n"); 912 return (EIO); 913 } 914 915 /* Setup phy to interrupt upon link down or autoneg completion. */ 916 lan78xx_miibus_readreg(sc->sc_ue.ue_dev, sc->sc_phyno, 917 MUGE_PHY_INTR_STAT); 918 lan78xx_miibus_writereg(sc->sc_ue.ue_dev, sc->sc_phyno, 919 MUGE_PHY_INTR_MASK, 920 (MUGE_PHY_INTR_ANEG_COMP | MUGE_PHY_INTR_LINK_CHANGE)); 921 922 /* Enable Auto-MDIX for crossover and polarity detection. */ 923 lan78xx_set_mdix_auto(sc); 924 925 /* Enable all modes. */ 926 lan78xx_miibus_writereg(sc->sc_ue.ue_dev, sc->sc_phyno, MII_ANAR, 927 ANAR_10 | ANAR_10_FD | ANAR_TX | ANAR_TX_FD | 928 ANAR_CSMA | ANAR_FC | ANAR_PAUSE_ASYM); 929 930 /* Restart auto-negotiation. */ 931 bmcr |= BMCR_STARTNEG; 932 bmcr |= BMCR_AUTOEN; 933 lan78xx_miibus_writereg(sc->sc_ue.ue_dev, sc->sc_phyno, MII_BMCR, bmcr); 934 bmcr = lan78xx_miibus_readreg(sc->sc_ue.ue_dev, sc->sc_phyno, MII_BMCR); 935 936 /* Configure LED Modes. */ 937 if (sc->sc_led_modes_mask != 0) { 938 lmsr = lan78xx_miibus_readreg(sc->sc_ue.ue_dev, sc->sc_phyno, 939 MUGE_PHY_LED_MODE); 940 lmsr &= ~sc->sc_led_modes_mask; 941 lmsr |= sc->sc_led_modes; 942 lan78xx_miibus_writereg(sc->sc_ue.ue_dev, sc->sc_phyno, 943 MUGE_PHY_LED_MODE, lmsr); 944 } 945 946 /* Enable appropriate LEDs. */ 947 if (sc->sc_leds != 0 && 948 lan78xx_read_reg(sc, ETH_HW_CFG, &hw_reg) == 0) { 949 hw_reg &= ~(ETH_HW_CFG_LEDO_EN_ | ETH_HW_CFG_LED1_EN_ | 950 ETH_HW_CFG_LED2_EN_ | ETH_HW_CFG_LED3_EN_ ); 951 hw_reg |= sc->sc_leds; 952 lan78xx_write_reg(sc, ETH_HW_CFG, hw_reg); 953 } 954 return (0); 955 } 956 957 /** 958 * lan78xx_chip_init - Initialises the chip after power on 959 * @sc: driver soft context 960 * 961 * This initialisation sequence is modelled on the procedure in the Linux 962 * driver. 963 * 964 * RETURNS: 965 * Returns 0 on success or an error code on failure. 966 */ 967 static int 968 lan78xx_chip_init(struct muge_softc *sc) 969 { 970 int err; 971 uint32_t buf; 972 uint32_t burst_cap; 973 974 MUGE_LOCK_ASSERT(sc, MA_OWNED); 975 976 /* Enter H/W config mode. */ 977 lan78xx_write_reg(sc, ETH_HW_CFG, ETH_HW_CFG_LRST_); 978 979 if ((err = lan78xx_wait_for_bits(sc, ETH_HW_CFG, ETH_HW_CFG_LRST_)) != 980 0) { 981 muge_warn_printf(sc, 982 "timed-out waiting for lite reset to complete\n"); 983 goto init_failed; 984 } 985 986 /* Set the mac address. */ 987 if ((err = lan78xx_setmacaddress(sc, sc->sc_ue.ue_eaddr)) != 0) { 988 muge_warn_printf(sc, "failed to set the MAC address\n"); 989 goto init_failed; 990 } 991 992 /* Read and display the revision register. */ 993 if ((err = lan78xx_read_reg(sc, ETH_ID_REV, &buf)) < 0) { 994 muge_warn_printf(sc, "failed to read ETH_ID_REV (err = %d)\n", 995 err); 996 goto init_failed; 997 } 998 sc->chipid = (buf & ETH_ID_REV_CHIP_ID_MASK_) >> 16; 999 sc->chiprev = buf & ETH_ID_REV_CHIP_REV_MASK_; 1000 switch (sc->chipid) { 1001 case ETH_ID_REV_CHIP_ID_7800_: 1002 case ETH_ID_REV_CHIP_ID_7850_: 1003 break; 1004 default: 1005 muge_warn_printf(sc, "Chip ID 0x%04x not yet supported\n", 1006 sc->chipid); 1007 goto init_failed; 1008 } 1009 device_printf(sc->sc_ue.ue_dev, "Chip ID 0x%04x rev %04x\n", sc->chipid, 1010 sc->chiprev); 1011 1012 /* Respond to BULK-IN tokens with a NAK when RX FIFO is empty. */ 1013 if ((err = lan78xx_read_reg(sc, ETH_USB_CFG0, &buf)) != 0) { 1014 muge_warn_printf(sc, "failed to read ETH_USB_CFG0 (err=%d)\n", err); 1015 goto init_failed; 1016 } 1017 buf |= ETH_USB_CFG_BIR_; 1018 lan78xx_write_reg(sc, ETH_USB_CFG0, buf); 1019 1020 /* 1021 * XXX LTM support will go here. 1022 */ 1023 1024 /* Configuring the burst cap. */ 1025 switch (usbd_get_speed(sc->sc_ue.ue_udev)) { 1026 case USB_SPEED_SUPER: 1027 burst_cap = MUGE_DEFAULT_BURST_CAP_SIZE/MUGE_SS_USB_PKT_SIZE; 1028 break; 1029 case USB_SPEED_HIGH: 1030 burst_cap = MUGE_DEFAULT_BURST_CAP_SIZE/MUGE_HS_USB_PKT_SIZE; 1031 break; 1032 default: 1033 burst_cap = MUGE_DEFAULT_BURST_CAP_SIZE/MUGE_FS_USB_PKT_SIZE; 1034 } 1035 1036 lan78xx_write_reg(sc, ETH_BURST_CAP, burst_cap); 1037 1038 /* Set the default bulk in delay (same value from Linux driver). */ 1039 lan78xx_write_reg(sc, ETH_BULK_IN_DLY, MUGE_DEFAULT_BULK_IN_DELAY); 1040 1041 /* Multiple ethernet frames per USB packets. */ 1042 err = lan78xx_read_reg(sc, ETH_HW_CFG, &buf); 1043 buf |= ETH_HW_CFG_MEF_; 1044 err = lan78xx_write_reg(sc, ETH_HW_CFG, buf); 1045 1046 /* Enable burst cap. */ 1047 if ((err = lan78xx_read_reg(sc, ETH_USB_CFG0, &buf)) < 0) { 1048 muge_warn_printf(sc, "failed to read ETH_USB_CFG0 (err=%d)\n", 1049 err); 1050 goto init_failed; 1051 } 1052 buf |= ETH_USB_CFG_BCE_; 1053 err = lan78xx_write_reg(sc, ETH_USB_CFG0, buf); 1054 1055 /* 1056 * Set FCL's RX and TX FIFO sizes: according to data sheet this is 1057 * already the default value. But we initialize it to the same value 1058 * anyways, as that's what the Linux driver does. 1059 * 1060 */ 1061 buf = (MUGE_MAX_RX_FIFO_SIZE - 512) / 512; 1062 err = lan78xx_write_reg(sc, ETH_FCT_RX_FIFO_END, buf); 1063 1064 buf = (MUGE_MAX_TX_FIFO_SIZE - 512) / 512; 1065 err = lan78xx_write_reg(sc, ETH_FCT_TX_FIFO_END, buf); 1066 1067 /* Enabling interrupts. (Not using them for now) */ 1068 err = lan78xx_write_reg(sc, ETH_INT_STS, ETH_INT_STS_CLEAR_ALL_); 1069 1070 /* 1071 * Initializing flow control registers to 0. These registers are 1072 * properly set is handled in link-reset function in the Linux driver. 1073 */ 1074 err = lan78xx_write_reg(sc, ETH_FLOW, 0); 1075 err = lan78xx_write_reg(sc, ETH_FCT_FLOW, 0); 1076 1077 /* 1078 * Settings for the RFE, we enable broadcast and destination address 1079 * perfect filtering. 1080 */ 1081 err = lan78xx_read_reg(sc, ETH_RFE_CTL, &buf); 1082 buf |= ETH_RFE_CTL_BCAST_EN_ | ETH_RFE_CTL_DA_PERFECT_; 1083 err = lan78xx_write_reg(sc, ETH_RFE_CTL, buf); 1084 1085 /* 1086 * At this point the Linux driver writes multicast tables, and enables 1087 * checksum engines. But in FreeBSD that gets done in muge_init, 1088 * which gets called when the interface is brought up. 1089 */ 1090 1091 /* Reset the PHY. */ 1092 lan78xx_write_reg(sc, ETH_PMT_CTL, ETH_PMT_CTL_PHY_RST_); 1093 if ((err = lan78xx_wait_for_bits(sc, ETH_PMT_CTL, 1094 ETH_PMT_CTL_PHY_RST_)) != 0) { 1095 muge_warn_printf(sc, 1096 "timed-out waiting for phy reset to complete\n"); 1097 goto init_failed; 1098 } 1099 1100 err = lan78xx_read_reg(sc, ETH_MAC_CR, &buf); 1101 if (sc->chipid == ETH_ID_REV_CHIP_ID_7800_ && 1102 !lan78xx_eeprom_present(sc)) { 1103 /* Set automatic duplex and speed on LAN7800 without EEPROM. */ 1104 buf |= ETH_MAC_CR_AUTO_DUPLEX_ | ETH_MAC_CR_AUTO_SPEED_; 1105 } 1106 err = lan78xx_write_reg(sc, ETH_MAC_CR, buf); 1107 1108 /* 1109 * Enable PHY interrupts (Not really getting used for now) 1110 * ETH_INT_EP_CTL: interrupt endpoint control register 1111 * phy events cause interrupts to be issued 1112 */ 1113 err = lan78xx_read_reg(sc, ETH_INT_EP_CTL, &buf); 1114 buf |= ETH_INT_ENP_PHY_INT; 1115 err = lan78xx_write_reg(sc, ETH_INT_EP_CTL, buf); 1116 1117 /* 1118 * Enables mac's transmitter. It will transmit frames from the buffer 1119 * onto the cable. 1120 */ 1121 err = lan78xx_read_reg(sc, ETH_MAC_TX, &buf); 1122 buf |= ETH_MAC_TX_TXEN_; 1123 err = lan78xx_write_reg(sc, ETH_MAC_TX, buf); 1124 1125 /* FIFO is capable of transmitting frames to MAC. */ 1126 err = lan78xx_read_reg(sc, ETH_FCT_TX_CTL, &buf); 1127 buf |= ETH_FCT_TX_CTL_EN_; 1128 err = lan78xx_write_reg(sc, ETH_FCT_TX_CTL, buf); 1129 1130 /* 1131 * Set max frame length. In linux this is dev->mtu (which by default 1132 * is 1500) + VLAN_ETH_HLEN = 1518. 1133 */ 1134 err = lan78xx_set_rx_max_frame_length(sc, ETHER_MAX_LEN); 1135 1136 /* Initialise the PHY. */ 1137 if ((err = lan78xx_phy_init(sc)) != 0) 1138 goto init_failed; 1139 1140 /* Enable MAC RX. */ 1141 err = lan78xx_read_reg(sc, ETH_MAC_RX, &buf); 1142 buf |= ETH_MAC_RX_EN_; 1143 err = lan78xx_write_reg(sc, ETH_MAC_RX, buf); 1144 1145 /* Enable FIFO controller RX. */ 1146 err = lan78xx_read_reg(sc, ETH_FCT_RX_CTL, &buf); 1147 buf |= ETH_FCT_TX_CTL_EN_; 1148 err = lan78xx_write_reg(sc, ETH_FCT_RX_CTL, buf); 1149 1150 sc->sc_flags |= MUGE_FLAG_INIT_DONE; 1151 return (0); 1152 1153 init_failed: 1154 muge_err_printf(sc, "lan78xx_chip_init failed (err=%d)\n", err); 1155 return (err); 1156 } 1157 1158 static void 1159 muge_bulk_read_callback(struct usb_xfer *xfer, usb_error_t error) 1160 { 1161 struct muge_softc *sc = usbd_xfer_softc(xfer); 1162 struct usb_ether *ue = &sc->sc_ue; 1163 if_t ifp = uether_getifp(ue); 1164 struct mbuf *m; 1165 struct usb_page_cache *pc; 1166 uint32_t rx_cmd_a, rx_cmd_b; 1167 uint16_t rx_cmd_c; 1168 int pktlen; 1169 int off; 1170 int actlen; 1171 1172 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 1173 muge_dbg_printf(sc, "rx : actlen %d\n", actlen); 1174 1175 switch (USB_GET_STATE(xfer)) { 1176 case USB_ST_TRANSFERRED: 1177 /* 1178 * There is always a zero length frame after bringing the 1179 * interface up. 1180 */ 1181 if (actlen < (sizeof(rx_cmd_a) + ETHER_CRC_LEN)) 1182 goto tr_setup; 1183 1184 /* 1185 * There may be multiple packets in the USB frame. Each will 1186 * have a header and each needs to have its own mbuf allocated 1187 * and populated for it. 1188 */ 1189 pc = usbd_xfer_get_frame(xfer, 0); 1190 off = 0; 1191 1192 while (off < actlen) { 1193 /* The frame header is aligned on a 4 byte boundary. */ 1194 off = ((off + 0x3) & ~0x3); 1195 1196 /* Extract RX CMD A. */ 1197 if (off + sizeof(rx_cmd_a) > actlen) 1198 goto tr_setup; 1199 usbd_copy_out(pc, off, &rx_cmd_a, sizeof(rx_cmd_a)); 1200 off += (sizeof(rx_cmd_a)); 1201 rx_cmd_a = le32toh(rx_cmd_a); 1202 1203 /* Extract RX CMD B. */ 1204 if (off + sizeof(rx_cmd_b) > actlen) 1205 goto tr_setup; 1206 usbd_copy_out(pc, off, &rx_cmd_b, sizeof(rx_cmd_b)); 1207 off += (sizeof(rx_cmd_b)); 1208 rx_cmd_b = le32toh(rx_cmd_b); 1209 1210 /* Extract RX CMD C. */ 1211 if (off + sizeof(rx_cmd_c) > actlen) 1212 goto tr_setup; 1213 usbd_copy_out(pc, off, &rx_cmd_c, sizeof(rx_cmd_c)); 1214 off += (sizeof(rx_cmd_c)); 1215 rx_cmd_c = le16toh(rx_cmd_c); 1216 1217 if (off > actlen) 1218 goto tr_setup; 1219 1220 pktlen = (rx_cmd_a & RX_CMD_A_LEN_MASK_); 1221 1222 muge_dbg_printf(sc, 1223 "rx_cmd_a 0x%08x rx_cmd_b 0x%08x rx_cmd_c 0x%04x " 1224 " pktlen %d actlen %d off %d\n", 1225 rx_cmd_a, rx_cmd_b, rx_cmd_c, pktlen, actlen, off); 1226 1227 if (rx_cmd_a & RX_CMD_A_RED_) { 1228 muge_dbg_printf(sc, 1229 "rx error (hdr 0x%08x)\n", rx_cmd_a); 1230 if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 1231 } else { 1232 /* Ethernet frame too big or too small? */ 1233 if ((pktlen < ETHER_HDR_LEN) || 1234 (pktlen > (actlen - off))) 1235 goto tr_setup; 1236 1237 /* Create a new mbuf to store the packet. */ 1238 m = uether_newbuf(); 1239 if (m == NULL) { 1240 muge_warn_printf(sc, 1241 "failed to create new mbuf\n"); 1242 if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1243 1); 1244 goto tr_setup; 1245 } 1246 if (pktlen > m->m_len) { 1247 muge_dbg_printf(sc, 1248 "buffer too small %d vs %d bytes", 1249 pktlen, m->m_len); 1250 if_inc_counter(ifp, IFCOUNTER_IQDROPS, 1); 1251 m_freem(m); 1252 goto tr_setup; 1253 } 1254 usbd_copy_out(pc, off, mtod(m, uint8_t *), 1255 pktlen); 1256 1257 /* 1258 * Check if RX checksums are computed, and 1259 * offload them 1260 */ 1261 if ((if_getcapenable(ifp) & IFCAP_RXCSUM) && 1262 !(rx_cmd_a & RX_CMD_A_ICSM_)) { 1263 /* 1264 * Remove the extra 2 bytes of the csum 1265 * 1266 * The checksum appears to be 1267 * simplistically calculated over the 1268 * protocol headers up to the end of the 1269 * eth frame. Which means if the eth 1270 * frame is padded the csum calculation 1271 * is incorrectly performed over the 1272 * padding bytes as well. Therefore to 1273 * be safe we ignore the H/W csum on 1274 * frames less than or equal to 1275 * 64 bytes. 1276 * 1277 * Protocols checksummed: 1278 * TCP, UDP, ICMP, IGMP, IP 1279 */ 1280 if (pktlen > ETHER_MIN_LEN) { 1281 m->m_pkthdr.csum_flags |= 1282 CSUM_DATA_VALID | 1283 CSUM_PSEUDO_HDR; 1284 1285 /* 1286 * Copy the checksum from the 1287 * last 2 bytes of the transfer 1288 * and put in the csum_data 1289 * field. 1290 */ 1291 usbd_copy_out(pc, 1292 (off + pktlen), 1293 &m->m_pkthdr.csum_data, 2); 1294 1295 /* 1296 * The data is copied in network 1297 * order, but the csum algorithm 1298 * in the kernel expects it to 1299 * be in host network order. 1300 */ 1301 m->m_pkthdr.csum_data = 1302 ntohs(0xffff); 1303 1304 muge_dbg_printf(sc, 1305 "RX checksum offloaded (0x%04x)\n", 1306 m->m_pkthdr.csum_data); 1307 } 1308 } 1309 1310 /* Enqueue the mbuf on the receive queue. */ 1311 if (pktlen < (4 + ETHER_HDR_LEN)) { 1312 m_freem(m); 1313 goto tr_setup; 1314 } 1315 /* Remove 4 trailing bytes */ 1316 uether_rxmbuf(ue, m, pktlen - 4); 1317 } 1318 1319 /* 1320 * Update the offset to move to the next potential 1321 * packet. 1322 */ 1323 off += pktlen; 1324 } 1325 /* FALLTHROUGH */ 1326 case USB_ST_SETUP: 1327 tr_setup: 1328 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 1329 usbd_transfer_submit(xfer); 1330 uether_rxflush(ue); 1331 return; 1332 default: 1333 if (error != USB_ERR_CANCELLED) { 1334 muge_warn_printf(sc, "bulk read error, %s\n", 1335 usbd_errstr(error)); 1336 usbd_xfer_set_stall(xfer); 1337 goto tr_setup; 1338 } 1339 return; 1340 } 1341 } 1342 1343 /** 1344 * muge_bulk_write_callback - Write callback used to send ethernet frame(s) 1345 * @xfer: the USB transfer 1346 * @error: error code if the transfers is in an errored state 1347 * 1348 * The main write function that pulls ethernet frames off the queue and 1349 * sends them out. 1350 * 1351 */ 1352 static void 1353 muge_bulk_write_callback(struct usb_xfer *xfer, usb_error_t error) 1354 { 1355 struct muge_softc *sc = usbd_xfer_softc(xfer); 1356 if_t ifp = uether_getifp(&sc->sc_ue); 1357 struct usb_page_cache *pc; 1358 struct mbuf *m; 1359 int nframes; 1360 uint32_t frm_len = 0, tx_cmd_a = 0, tx_cmd_b = 0; 1361 1362 switch (USB_GET_STATE(xfer)) { 1363 case USB_ST_TRANSFERRED: 1364 muge_dbg_printf(sc, 1365 "USB TRANSFER status: USB_ST_TRANSFERRED\n"); 1366 if_setdrvflagbits(ifp, 0, IFF_DRV_OACTIVE); 1367 /* FALLTHROUGH */ 1368 case USB_ST_SETUP: 1369 muge_dbg_printf(sc, "USB TRANSFER status: USB_ST_SETUP\n"); 1370 tr_setup: 1371 if ((sc->sc_flags & MUGE_FLAG_LINK) == 0 || 1372 (if_getdrvflags(ifp) & IFF_DRV_OACTIVE) != 0) { 1373 muge_dbg_printf(sc, 1374 "sc->sc_flags & MUGE_FLAG_LINK: %d\n", 1375 (sc->sc_flags & MUGE_FLAG_LINK)); 1376 muge_dbg_printf(sc, 1377 "if_getdrvflags(ifp) & IFF_DRV_OACTIVE: %d", 1378 (if_getdrvflags(ifp) & IFF_DRV_OACTIVE)); 1379 muge_dbg_printf(sc, 1380 "USB TRANSFER not sending: no link or controller is busy \n"); 1381 /* 1382 * Don't send anything if there is no link or 1383 * controller is busy. 1384 */ 1385 return; 1386 } 1387 for (nframes = 0; 1388 nframes < 16 && !if_sendq_empty(ifp); 1389 nframes++) { 1390 m = if_dequeue(ifp); 1391 if (m == NULL) 1392 break; 1393 usbd_xfer_set_frame_offset(xfer, nframes * MCLBYTES, 1394 nframes); 1395 frm_len = 0; 1396 pc = usbd_xfer_get_frame(xfer, nframes); 1397 1398 /* 1399 * Each frame is prefixed with two 32-bit values 1400 * describing the length of the packet and buffer. 1401 */ 1402 tx_cmd_a = (m->m_pkthdr.len & TX_CMD_A_LEN_MASK_) | 1403 TX_CMD_A_FCS_; 1404 tx_cmd_a = htole32(tx_cmd_a); 1405 usbd_copy_in(pc, 0, &tx_cmd_a, sizeof(tx_cmd_a)); 1406 1407 tx_cmd_b = 0; 1408 1409 /* TCP LSO Support will probably be implemented here. */ 1410 tx_cmd_b = htole32(tx_cmd_b); 1411 usbd_copy_in(pc, 4, &tx_cmd_b, sizeof(tx_cmd_b)); 1412 1413 frm_len += 8; 1414 1415 /* Next copy in the actual packet */ 1416 usbd_m_copy_in(pc, frm_len, m, 0, m->m_pkthdr.len); 1417 frm_len += m->m_pkthdr.len; 1418 1419 if_inc_counter(ifp, IFCOUNTER_OPACKETS, 1); 1420 1421 /* 1422 * If there's a BPF listener, bounce a copy of this 1423 * frame to it. 1424 */ 1425 BPF_MTAP(ifp, m); 1426 m_freem(m); 1427 1428 /* Set frame length. */ 1429 usbd_xfer_set_frame_len(xfer, nframes, frm_len); 1430 } 1431 1432 muge_dbg_printf(sc, "USB TRANSFER nframes: %d\n", nframes); 1433 if (nframes != 0) { 1434 muge_dbg_printf(sc, "USB TRANSFER submit attempt\n"); 1435 usbd_xfer_set_frames(xfer, nframes); 1436 usbd_transfer_submit(xfer); 1437 if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, 0); 1438 } 1439 return; 1440 1441 default: 1442 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1); 1443 if_setdrvflagbits(ifp, 0, IFF_DRV_OACTIVE); 1444 1445 if (error != USB_ERR_CANCELLED) { 1446 muge_err_printf(sc, 1447 "usb error on tx: %s\n", usbd_errstr(error)); 1448 usbd_xfer_set_stall(xfer); 1449 goto tr_setup; 1450 } 1451 return; 1452 } 1453 } 1454 1455 /** 1456 * muge_set_mac_addr - Initiailizes NIC MAC address 1457 * @ue: the USB ethernet device 1458 * 1459 * Tries to obtain MAC address from number of sources: registers, 1460 * EEPROM, DTB blob. If all sources fail - generates random MAC. 1461 */ 1462 static void 1463 muge_set_mac_addr(struct usb_ether *ue) 1464 { 1465 struct muge_softc *sc = uether_getsc(ue); 1466 uint32_t mac_h, mac_l; 1467 1468 memset(ue->ue_eaddr, 0xff, ETHER_ADDR_LEN); 1469 1470 uint32_t val; 1471 lan78xx_read_reg(sc, 0, &val); 1472 1473 /* Read current MAC address from RX_ADDRx registers. */ 1474 if ((lan78xx_read_reg(sc, ETH_RX_ADDRL, &mac_l) == 0) && 1475 (lan78xx_read_reg(sc, ETH_RX_ADDRH, &mac_h) == 0)) { 1476 ue->ue_eaddr[5] = (uint8_t)((mac_h >> 8) & 0xff); 1477 ue->ue_eaddr[4] = (uint8_t)((mac_h) & 0xff); 1478 ue->ue_eaddr[3] = (uint8_t)((mac_l >> 24) & 0xff); 1479 ue->ue_eaddr[2] = (uint8_t)((mac_l >> 16) & 0xff); 1480 ue->ue_eaddr[1] = (uint8_t)((mac_l >> 8) & 0xff); 1481 ue->ue_eaddr[0] = (uint8_t)((mac_l) & 0xff); 1482 } 1483 1484 /* 1485 * If RX_ADDRx did not provide a valid MAC address, try EEPROM. If that 1486 * doesn't work, try OTP. Whether any of these methods work or not, try 1487 * FDT data, because it is allowed to override the EEPROM/OTP values. 1488 */ 1489 if (ETHER_IS_VALID(ue->ue_eaddr)) { 1490 muge_dbg_printf(sc, "MAC assigned from registers\n"); 1491 } else if (lan78xx_eeprom_present(sc) && lan78xx_eeprom_read_raw(sc, 1492 ETH_E2P_MAC_OFFSET, ue->ue_eaddr, ETHER_ADDR_LEN) == 0 && 1493 ETHER_IS_VALID(ue->ue_eaddr)) { 1494 muge_dbg_printf(sc, "MAC assigned from EEPROM\n"); 1495 } else if (lan78xx_otp_read(sc, OTP_MAC_OFFSET, ue->ue_eaddr, 1496 ETHER_ADDR_LEN) == 0 && ETHER_IS_VALID(ue->ue_eaddr)) { 1497 muge_dbg_printf(sc, "MAC assigned from OTP\n"); 1498 } 1499 1500 #ifdef FDT 1501 /* ue->ue_eaddr modified only if config exists for this dev instance. */ 1502 usb_fdt_get_mac_addr(ue->ue_dev, ue); 1503 if (ETHER_IS_VALID(ue->ue_eaddr)) { 1504 muge_dbg_printf(sc, "MAC assigned from FDT data\n"); 1505 } 1506 #endif 1507 1508 if (!ETHER_IS_VALID(ue->ue_eaddr)) { 1509 muge_dbg_printf(sc, "MAC assigned randomly\n"); 1510 arc4rand(ue->ue_eaddr, ETHER_ADDR_LEN, 0); 1511 ue->ue_eaddr[0] &= ~0x01; /* unicast */ 1512 ue->ue_eaddr[0] |= 0x02; /* locally administered */ 1513 } 1514 } 1515 1516 /** 1517 * muge_set_leds - Initializes NIC LEDs pattern 1518 * @ue: the USB ethernet device 1519 * 1520 * Tries to store the LED modes. 1521 * Supports only DTB blob like the Linux driver does. 1522 */ 1523 static void 1524 muge_set_leds(struct usb_ether *ue) 1525 { 1526 #ifdef FDT 1527 struct muge_softc *sc = uether_getsc(ue); 1528 phandle_t node; 1529 pcell_t modes[4]; /* 4 LEDs are possible */ 1530 ssize_t proplen; 1531 uint32_t count; 1532 1533 if ((node = usb_fdt_get_node(ue->ue_dev, ue->ue_udev)) != -1 && 1534 (proplen = OF_getencprop(node, "microchip,led-modes", modes, 1535 sizeof(modes))) > 0) { 1536 count = proplen / sizeof( uint32_t ); 1537 sc->sc_leds = (count > 0) * ETH_HW_CFG_LEDO_EN_ | 1538 (count > 1) * ETH_HW_CFG_LED1_EN_ | 1539 (count > 2) * ETH_HW_CFG_LED2_EN_ | 1540 (count > 3) * ETH_HW_CFG_LED3_EN_; 1541 while (count-- > 0) { 1542 sc->sc_led_modes |= (modes[count] & 0xf) << (4 * count); 1543 sc->sc_led_modes_mask |= 0xf << (4 * count); 1544 } 1545 muge_dbg_printf(sc, "LED modes set from FDT data\n"); 1546 } 1547 #endif 1548 } 1549 1550 /** 1551 * muge_attach_post - Called after the driver attached to the USB interface 1552 * @ue: the USB ethernet device 1553 * 1554 * This is where the chip is intialised for the first time. This is 1555 * different from the muge_init() function in that that one is designed to 1556 * setup the H/W to match the UE settings and can be called after a reset. 1557 * 1558 */ 1559 static void 1560 muge_attach_post(struct usb_ether *ue) 1561 { 1562 struct muge_softc *sc = uether_getsc(ue); 1563 1564 muge_dbg_printf(sc, "Calling muge_attach_post.\n"); 1565 1566 /* Setup some of the basics */ 1567 sc->sc_phyno = 1; 1568 1569 muge_set_mac_addr(ue); 1570 muge_set_leds(ue); 1571 1572 /* Initialise the chip for the first time */ 1573 lan78xx_chip_init(sc); 1574 } 1575 1576 /** 1577 * muge_attach_post_sub - Called after attach to the USB interface 1578 * @ue: the USB ethernet device 1579 * 1580 * Most of this is boilerplate code and copied from the base USB ethernet 1581 * driver. It has been overridden so that we can indicate to the system 1582 * that the chip supports H/W checksumming. 1583 * 1584 * RETURNS: 1585 * Returns 0 on success or a negative error code. 1586 */ 1587 static int 1588 muge_attach_post_sub(struct usb_ether *ue) 1589 { 1590 struct muge_softc *sc; 1591 if_t ifp; 1592 1593 sc = uether_getsc(ue); 1594 muge_dbg_printf(sc, "Calling muge_attach_post_sub.\n"); 1595 ifp = ue->ue_ifp; 1596 if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST); 1597 if_setstartfn(ifp, uether_start); 1598 if_setioctlfn(ifp, muge_ioctl); 1599 if_setinitfn(ifp, uether_init); 1600 if_setsendqlen(ifp, ifqmaxlen); 1601 if_setsendqready(ifp); 1602 1603 /* 1604 * The chip supports TCP/UDP checksum offloading on TX and RX paths, 1605 * however currently only RX checksum is supported in the driver 1606 * (see top of file). 1607 */ 1608 if_setcapabilitiesbit(ifp, IFCAP_VLAN_MTU, 0); 1609 if_sethwassist(ifp, 0); 1610 if_setcapabilitiesbit(ifp, IFCAP_RXCSUM, 0); 1611 1612 if (MUGE_DEFAULT_TX_CSUM_ENABLE) 1613 if_setcapabilitiesbit(ifp, IFCAP_TXCSUM, 0); 1614 1615 /* 1616 * In the Linux driver they also enable scatter/gather (NETIF_F_SG) 1617 * here, that's something related to socket buffers used in Linux. 1618 * FreeBSD doesn't have that as an interface feature. 1619 */ 1620 if (MUGE_DEFAULT_TSO_ENABLE) 1621 if_setcapabilitiesbit(ifp, IFCAP_TSO4 | IFCAP_TSO6, 0); 1622 1623 #if 0 1624 /* TX checksuming is disabled since not yet implemented. */ 1625 if_setcapabilitiesbit(ifp, IFCAP_TXCSUM, 0); 1626 if_setcapenablebit(ifp, IFCAP_TXCSUM, 0); 1627 if_sethwassist(ifp, CSUM_TCP | CSUM_UDP); 1628 #endif 1629 1630 if_setcapenable(ifp, if_getcapabilities(ifp)); 1631 1632 bus_topo_lock(); 1633 mii_attach(ue->ue_dev, &ue->ue_miibus, ifp, uether_ifmedia_upd, 1634 ue->ue_methods->ue_mii_sts, BMSR_DEFCAPMASK, sc->sc_phyno, 1635 MII_OFFSET_ANY, 0); 1636 bus_topo_unlock(); 1637 1638 return (0); 1639 } 1640 1641 /** 1642 * muge_start - Starts communication with the LAN78xx chip 1643 * @ue: USB ether interface 1644 */ 1645 static void 1646 muge_start(struct usb_ether *ue) 1647 { 1648 struct muge_softc *sc = uether_getsc(ue); 1649 1650 /* 1651 * Start the USB transfers, if not already started. 1652 */ 1653 usbd_transfer_start(sc->sc_xfer[MUGE_BULK_DT_RD]); 1654 usbd_transfer_start(sc->sc_xfer[MUGE_BULK_DT_WR]); 1655 } 1656 1657 /** 1658 * muge_ioctl - ioctl function for the device 1659 * @ifp: interface pointer 1660 * @cmd: the ioctl command 1661 * @data: data passed in the ioctl call, typically a pointer to struct 1662 * ifreq. 1663 * 1664 * The ioctl routine is overridden to detect change requests for the H/W 1665 * checksum capabilities. 1666 * 1667 * RETURNS: 1668 * 0 on success and an error code on failure. 1669 */ 1670 static int 1671 muge_ioctl(if_t ifp, u_long cmd, caddr_t data) 1672 { 1673 struct usb_ether *ue = if_getsoftc(ifp); 1674 struct muge_softc *sc; 1675 struct ifreq *ifr; 1676 int rc; 1677 int mask; 1678 int reinit; 1679 1680 if (cmd == SIOCSIFCAP) { 1681 sc = uether_getsc(ue); 1682 ifr = (struct ifreq *)data; 1683 1684 MUGE_LOCK(sc); 1685 1686 rc = 0; 1687 reinit = 0; 1688 1689 mask = ifr->ifr_reqcap ^ if_getcapenable(ifp); 1690 1691 /* Modify the RX CSUM enable bits. */ 1692 if ((mask & IFCAP_RXCSUM) != 0 && 1693 (if_getcapabilities(ifp) & IFCAP_RXCSUM) != 0) { 1694 if_togglecapenable(ifp, IFCAP_RXCSUM); 1695 1696 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { 1697 if_setdrvflagbits(ifp, 0, IFF_DRV_RUNNING); 1698 reinit = 1; 1699 } 1700 } 1701 1702 MUGE_UNLOCK(sc); 1703 if (reinit) 1704 uether_init(ue); 1705 } else { 1706 rc = uether_ioctl(ifp, cmd, data); 1707 } 1708 1709 return (rc); 1710 } 1711 1712 /** 1713 * muge_reset - Reset the SMSC chip 1714 * @sc: device soft context 1715 * 1716 * LOCKING: 1717 * Should be called with the SMSC lock held. 1718 */ 1719 static void 1720 muge_reset(struct muge_softc *sc) 1721 { 1722 struct usb_config_descriptor *cd; 1723 usb_error_t err; 1724 1725 cd = usbd_get_config_descriptor(sc->sc_ue.ue_udev); 1726 1727 err = usbd_req_set_config(sc->sc_ue.ue_udev, &sc->sc_mtx, 1728 cd->bConfigurationValue); 1729 if (err) 1730 muge_warn_printf(sc, "reset failed (ignored)\n"); 1731 1732 /* Wait a little while for the chip to get its brains in order. */ 1733 uether_pause(&sc->sc_ue, hz / 100); 1734 1735 /* Reinitialize controller to achieve full reset. */ 1736 lan78xx_chip_init(sc); 1737 } 1738 1739 /** 1740 * muge_set_addr_filter 1741 * 1742 * @sc: device soft context 1743 * @index: index of the entry to the perfect address table 1744 * @addr: address to be written 1745 * 1746 */ 1747 static void 1748 muge_set_addr_filter(struct muge_softc *sc, int index, 1749 uint8_t addr[ETHER_ADDR_LEN]) 1750 { 1751 uint32_t tmp; 1752 1753 if ((sc) && (index > 0) && (index < MUGE_NUM_PFILTER_ADDRS_)) { 1754 tmp = addr[3]; 1755 tmp |= addr[2] | (tmp << 8); 1756 tmp |= addr[1] | (tmp << 8); 1757 tmp |= addr[0] | (tmp << 8); 1758 sc->sc_pfilter_table[index][1] = tmp; 1759 tmp = addr[5]; 1760 tmp |= addr[4] | (tmp << 8); 1761 tmp |= ETH_MAF_HI_VALID_ | ETH_MAF_HI_TYPE_DST_; 1762 sc->sc_pfilter_table[index][0] = tmp; 1763 } 1764 } 1765 1766 /** 1767 * lan78xx_dataport_write - write to the selected RAM 1768 * @sc: The device soft context. 1769 * @ram_select: Select which RAM to access. 1770 * @addr: Starting address to write to. 1771 * @buf: word-sized buffer to write to RAM, starting at @addr. 1772 * @length: length of @buf 1773 * 1774 * 1775 * RETURNS: 1776 * 0 if write successful. 1777 */ 1778 static int 1779 lan78xx_dataport_write(struct muge_softc *sc, uint32_t ram_select, 1780 uint32_t addr, uint32_t length, uint32_t *buf) 1781 { 1782 uint32_t dp_sel; 1783 int i, ret; 1784 1785 MUGE_LOCK_ASSERT(sc, MA_OWNED); 1786 ret = lan78xx_wait_for_bits(sc, ETH_DP_SEL, ETH_DP_SEL_DPRDY_); 1787 if (ret < 0) 1788 goto done; 1789 1790 ret = lan78xx_read_reg(sc, ETH_DP_SEL, &dp_sel); 1791 1792 dp_sel &= ~ETH_DP_SEL_RSEL_MASK_; 1793 dp_sel |= ram_select; 1794 1795 ret = lan78xx_write_reg(sc, ETH_DP_SEL, dp_sel); 1796 1797 for (i = 0; i < length; i++) { 1798 ret = lan78xx_write_reg(sc, ETH_DP_ADDR, addr + i); 1799 ret = lan78xx_write_reg(sc, ETH_DP_DATA, buf[i]); 1800 ret = lan78xx_write_reg(sc, ETH_DP_CMD, ETH_DP_CMD_WRITE_); 1801 ret = lan78xx_wait_for_bits(sc, ETH_DP_SEL, ETH_DP_SEL_DPRDY_); 1802 if (ret != 0) 1803 goto done; 1804 } 1805 1806 done: 1807 return (ret); 1808 } 1809 1810 /** 1811 * muge_multicast_write 1812 * @sc: device's soft context 1813 * 1814 * Writes perfect address filters and hash address filters to their 1815 * corresponding registers and RAMs. 1816 * 1817 */ 1818 static void 1819 muge_multicast_write(struct muge_softc *sc) 1820 { 1821 int i; 1822 lan78xx_dataport_write(sc, ETH_DP_SEL_RSEL_VLAN_DA_, 1823 ETH_DP_SEL_VHF_VLAN_LEN, ETH_DP_SEL_VHF_HASH_LEN, 1824 sc->sc_mchash_table); 1825 1826 for (i = 1; i < MUGE_NUM_PFILTER_ADDRS_; i++) { 1827 lan78xx_write_reg(sc, PFILTER_HI(i), 0); 1828 lan78xx_write_reg(sc, PFILTER_LO(i), 1829 sc->sc_pfilter_table[i][1]); 1830 lan78xx_write_reg(sc, PFILTER_HI(i), 1831 sc->sc_pfilter_table[i][0]); 1832 } 1833 } 1834 1835 /** 1836 * muge_hash - Calculate the hash of a mac address 1837 * @addr: The mac address to calculate the hash on 1838 * 1839 * This function is used when configuring a range of multicast mac 1840 * addresses to filter on. The hash of the mac address is put in the 1841 * device's mac hash table. 1842 * 1843 * RETURNS: 1844 * Returns a value from 0-63 value which is the hash of the mac address. 1845 */ 1846 static inline uint32_t 1847 muge_hash(uint8_t addr[ETHER_ADDR_LEN]) 1848 { 1849 return (ether_crc32_be(addr, ETHER_ADDR_LEN) >> 23) & 0x1ff; 1850 } 1851 1852 static u_int 1853 muge_hash_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt) 1854 { 1855 struct muge_softc *sc = arg; 1856 uint32_t bitnum; 1857 1858 /* First fill up the perfect address table. */ 1859 if (cnt < 32 /* XXX */) 1860 muge_set_addr_filter(sc, cnt + 1, LLADDR(sdl)); 1861 else { 1862 bitnum = muge_hash(LLADDR(sdl)); 1863 sc->sc_mchash_table[bitnum / 32] |= (1 << (bitnum % 32)); 1864 sc->sc_rfe_ctl |= ETH_RFE_CTL_MCAST_HASH_; 1865 } 1866 1867 return (1); 1868 } 1869 1870 /** 1871 * muge_setmulti - Setup multicast 1872 * @ue: usb ethernet device context 1873 * 1874 * Tells the device to either accept frames with a multicast mac address, 1875 * a select group of m'cast mac addresses or just the devices mac address. 1876 * 1877 * LOCKING: 1878 * Should be called with the MUGE lock held. 1879 */ 1880 static void 1881 muge_setmulti(struct usb_ether *ue) 1882 { 1883 struct muge_softc *sc = uether_getsc(ue); 1884 if_t ifp = uether_getifp(ue); 1885 uint8_t i; 1886 1887 MUGE_LOCK_ASSERT(sc, MA_OWNED); 1888 1889 sc->sc_rfe_ctl &= ~(ETH_RFE_CTL_UCAST_EN_ | ETH_RFE_CTL_MCAST_EN_ | 1890 ETH_RFE_CTL_DA_PERFECT_ | ETH_RFE_CTL_MCAST_HASH_); 1891 1892 /* Initialize hash filter table. */ 1893 for (i = 0; i < ETH_DP_SEL_VHF_HASH_LEN; i++) 1894 sc->sc_mchash_table[i] = 0; 1895 1896 /* Initialize perfect filter table. */ 1897 for (i = 1; i < MUGE_NUM_PFILTER_ADDRS_; i++) { 1898 sc->sc_pfilter_table[i][0] = sc->sc_pfilter_table[i][1] = 0; 1899 } 1900 1901 sc->sc_rfe_ctl |= ETH_RFE_CTL_BCAST_EN_; 1902 1903 if (if_getflags(ifp) & IFF_PROMISC) { 1904 muge_dbg_printf(sc, "promiscuous mode enabled\n"); 1905 sc->sc_rfe_ctl |= ETH_RFE_CTL_MCAST_EN_ | ETH_RFE_CTL_UCAST_EN_; 1906 } else if (if_getflags(ifp) & IFF_ALLMULTI) { 1907 muge_dbg_printf(sc, "receive all multicast enabled\n"); 1908 sc->sc_rfe_ctl |= ETH_RFE_CTL_MCAST_EN_; 1909 } else { 1910 if_foreach_llmaddr(ifp, muge_hash_maddr, sc); 1911 muge_multicast_write(sc); 1912 } 1913 lan78xx_write_reg(sc, ETH_RFE_CTL, sc->sc_rfe_ctl); 1914 } 1915 1916 /** 1917 * muge_setpromisc - Enables/disables promiscuous mode 1918 * @ue: usb ethernet device context 1919 * 1920 * LOCKING: 1921 * Should be called with the MUGE lock held. 1922 */ 1923 static void 1924 muge_setpromisc(struct usb_ether *ue) 1925 { 1926 struct muge_softc *sc = uether_getsc(ue); 1927 if_t ifp = uether_getifp(ue); 1928 1929 muge_dbg_printf(sc, "promiscuous mode %sabled\n", 1930 (if_getflags(ifp) & IFF_PROMISC) ? "en" : "dis"); 1931 1932 MUGE_LOCK_ASSERT(sc, MA_OWNED); 1933 1934 if (if_getflags(ifp) & IFF_PROMISC) 1935 sc->sc_rfe_ctl |= ETH_RFE_CTL_MCAST_EN_ | ETH_RFE_CTL_UCAST_EN_; 1936 else 1937 sc->sc_rfe_ctl &= ~(ETH_RFE_CTL_MCAST_EN_); 1938 1939 lan78xx_write_reg(sc, ETH_RFE_CTL, sc->sc_rfe_ctl); 1940 } 1941 1942 /** 1943 * muge_sethwcsum - Enable or disable H/W UDP and TCP checksumming 1944 * @sc: driver soft context 1945 * 1946 * LOCKING: 1947 * Should be called with the MUGE lock held. 1948 * 1949 * RETURNS: 1950 * Returns 0 on success or a negative error code. 1951 */ 1952 static int 1953 muge_sethwcsum(struct muge_softc *sc) 1954 { 1955 if_t ifp = uether_getifp(&sc->sc_ue); 1956 int err; 1957 1958 if (!ifp) 1959 return (-EIO); 1960 1961 MUGE_LOCK_ASSERT(sc, MA_OWNED); 1962 1963 if (if_getcapenable(ifp) & IFCAP_RXCSUM) { 1964 sc->sc_rfe_ctl |= ETH_RFE_CTL_IGMP_COE_ | ETH_RFE_CTL_ICMP_COE_; 1965 sc->sc_rfe_ctl |= ETH_RFE_CTL_TCPUDP_COE_ | ETH_RFE_CTL_IP_COE_; 1966 } else { 1967 sc->sc_rfe_ctl &= 1968 ~(ETH_RFE_CTL_IGMP_COE_ | ETH_RFE_CTL_ICMP_COE_); 1969 sc->sc_rfe_ctl &= 1970 ~(ETH_RFE_CTL_TCPUDP_COE_ | ETH_RFE_CTL_IP_COE_); 1971 } 1972 1973 sc->sc_rfe_ctl &= ~ETH_RFE_CTL_VLAN_FILTER_; 1974 1975 err = lan78xx_write_reg(sc, ETH_RFE_CTL, sc->sc_rfe_ctl); 1976 1977 if (err != 0) { 1978 muge_warn_printf(sc, "failed to write ETH_RFE_CTL (err=%d)\n", 1979 err); 1980 return (err); 1981 } 1982 1983 return (0); 1984 } 1985 1986 /** 1987 * muge_ifmedia_upd - Set media options 1988 * @ifp: interface pointer 1989 * 1990 * Basically boilerplate code that simply calls the mii functions to set 1991 * the media options. 1992 * 1993 * LOCKING: 1994 * The device lock must be held before this function is called. 1995 * 1996 * RETURNS: 1997 * Returns 0 on success or a negative error code. 1998 */ 1999 static int 2000 muge_ifmedia_upd(if_t ifp) 2001 { 2002 struct muge_softc *sc = if_getsoftc(ifp); 2003 muge_dbg_printf(sc, "Calling muge_ifmedia_upd.\n"); 2004 struct mii_data *mii = uether_getmii(&sc->sc_ue); 2005 struct mii_softc *miisc; 2006 int err; 2007 2008 MUGE_LOCK_ASSERT(sc, MA_OWNED); 2009 2010 LIST_FOREACH(miisc, &mii->mii_phys, mii_list) 2011 PHY_RESET(miisc); 2012 err = mii_mediachg(mii); 2013 return (err); 2014 } 2015 2016 /** 2017 * muge_init - Initialises the LAN95xx chip 2018 * @ue: USB ether interface 2019 * 2020 * Called when the interface is brought up (i.e. ifconfig ue0 up), this 2021 * initialise the interface and the rx/tx pipes. 2022 * 2023 * LOCKING: 2024 * Should be called with the MUGE lock held. 2025 */ 2026 static void 2027 muge_init(struct usb_ether *ue) 2028 { 2029 struct muge_softc *sc = uether_getsc(ue); 2030 muge_dbg_printf(sc, "Calling muge_init.\n"); 2031 if_t ifp = uether_getifp(ue); 2032 MUGE_LOCK_ASSERT(sc, MA_OWNED); 2033 2034 if (lan78xx_setmacaddress(sc, if_getlladdr(ifp))) 2035 muge_dbg_printf(sc, "setting MAC address failed\n"); 2036 2037 if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0) 2038 return; 2039 2040 /* Cancel pending I/O. */ 2041 muge_stop(ue); 2042 2043 /* Reset the ethernet interface. */ 2044 muge_reset(sc); 2045 2046 /* Load the multicast filter. */ 2047 muge_setmulti(ue); 2048 2049 /* TCP/UDP checksum offload engines. */ 2050 muge_sethwcsum(sc); 2051 2052 usbd_xfer_set_stall(sc->sc_xfer[MUGE_BULK_DT_WR]); 2053 2054 /* Indicate we are up and running. */ 2055 if_setdrvflagbits(ifp, IFF_DRV_RUNNING, 0); 2056 2057 /* Switch to selected media. */ 2058 muge_ifmedia_upd(ifp); 2059 muge_start(ue); 2060 } 2061 2062 /** 2063 * muge_stop - Stops communication with the LAN78xx chip 2064 * @ue: USB ether interface 2065 */ 2066 static void 2067 muge_stop(struct usb_ether *ue) 2068 { 2069 struct muge_softc *sc = uether_getsc(ue); 2070 if_t ifp = uether_getifp(ue); 2071 2072 MUGE_LOCK_ASSERT(sc, MA_OWNED); 2073 2074 if_setdrvflagbits(ifp, 0, (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)); 2075 sc->sc_flags &= ~MUGE_FLAG_LINK; 2076 2077 /* 2078 * Stop all the transfers, if not already stopped. 2079 */ 2080 usbd_transfer_stop(sc->sc_xfer[MUGE_BULK_DT_WR]); 2081 usbd_transfer_stop(sc->sc_xfer[MUGE_BULK_DT_RD]); 2082 } 2083 2084 /** 2085 * muge_tick - Called periodically to monitor the state of the LAN95xx chip 2086 * @ue: USB ether interface 2087 * 2088 * Simply calls the mii status functions to check the state of the link. 2089 * 2090 * LOCKING: 2091 * Should be called with the MUGE lock held. 2092 */ 2093 static void 2094 muge_tick(struct usb_ether *ue) 2095 { 2096 2097 struct muge_softc *sc = uether_getsc(ue); 2098 struct mii_data *mii = uether_getmii(&sc->sc_ue); 2099 2100 MUGE_LOCK_ASSERT(sc, MA_OWNED); 2101 2102 mii_tick(mii); 2103 if ((sc->sc_flags & MUGE_FLAG_LINK) == 0) { 2104 lan78xx_miibus_statchg(ue->ue_dev); 2105 if ((sc->sc_flags & MUGE_FLAG_LINK) != 0) 2106 muge_start(ue); 2107 } 2108 } 2109 2110 /** 2111 * muge_ifmedia_sts - Report current media status 2112 * @ifp: inet interface pointer 2113 * @ifmr: interface media request 2114 * 2115 * Call the mii functions to get the media status. 2116 * 2117 * LOCKING: 2118 * Internally takes and releases the device lock. 2119 */ 2120 static void 2121 muge_ifmedia_sts(if_t ifp, struct ifmediareq *ifmr) 2122 { 2123 struct muge_softc *sc = if_getsoftc(ifp); 2124 struct mii_data *mii = uether_getmii(&sc->sc_ue); 2125 2126 MUGE_LOCK(sc); 2127 mii_pollstat(mii); 2128 ifmr->ifm_active = mii->mii_media_active; 2129 ifmr->ifm_status = mii->mii_media_status; 2130 MUGE_UNLOCK(sc); 2131 } 2132 2133 /** 2134 * muge_probe - Probe the interface. 2135 * @dev: muge device handle 2136 * 2137 * Checks if the device is a match for this driver. 2138 * 2139 * RETURNS: 2140 * Returns 0 on success or an error code on failure. 2141 */ 2142 static int 2143 muge_probe(device_t dev) 2144 { 2145 struct usb_attach_arg *uaa = device_get_ivars(dev); 2146 2147 if (uaa->usb_mode != USB_MODE_HOST) 2148 return (ENXIO); 2149 if (uaa->info.bConfigIndex != MUGE_CONFIG_INDEX) 2150 return (ENXIO); 2151 if (uaa->info.bIfaceIndex != MUGE_IFACE_IDX) 2152 return (ENXIO); 2153 return (usbd_lookup_id_by_uaa(lan78xx_devs, sizeof(lan78xx_devs), uaa)); 2154 } 2155 2156 /** 2157 * muge_attach - Attach the interface. 2158 * @dev: muge device handle 2159 * 2160 * Allocate softc structures, do ifmedia setup and ethernet/BPF attach. 2161 * 2162 * RETURNS: 2163 * Returns 0 on success or a negative error code. 2164 */ 2165 static int 2166 muge_attach(device_t dev) 2167 { 2168 struct usb_attach_arg *uaa = device_get_ivars(dev); 2169 struct muge_softc *sc = device_get_softc(dev); 2170 struct usb_ether *ue = &sc->sc_ue; 2171 uint8_t iface_index; 2172 int err; 2173 2174 sc->sc_flags = USB_GET_DRIVER_INFO(uaa); 2175 2176 device_set_usb_desc(dev); 2177 2178 mtx_init(&sc->sc_mtx, device_get_nameunit(dev), NULL, MTX_DEF); 2179 2180 /* Setup the endpoints for the Microchip LAN78xx device. */ 2181 iface_index = MUGE_IFACE_IDX; 2182 err = usbd_transfer_setup(uaa->device, &iface_index, sc->sc_xfer, 2183 muge_config, MUGE_N_TRANSFER, sc, &sc->sc_mtx); 2184 if (err) { 2185 device_printf(dev, "error: allocating USB transfers failed\n"); 2186 goto err; 2187 } 2188 2189 ue->ue_sc = sc; 2190 ue->ue_dev = dev; 2191 ue->ue_udev = uaa->device; 2192 ue->ue_mtx = &sc->sc_mtx; 2193 ue->ue_methods = &muge_ue_methods; 2194 2195 err = uether_ifattach(ue); 2196 if (err) { 2197 device_printf(dev, "error: could not attach interface\n"); 2198 goto err_usbd; 2199 } 2200 2201 /* Wait for lan78xx_chip_init from post-attach callback to complete. */ 2202 uether_ifattach_wait(ue); 2203 if (!(sc->sc_flags & MUGE_FLAG_INIT_DONE)) 2204 goto err_attached; 2205 2206 return (0); 2207 2208 err_attached: 2209 uether_ifdetach(ue); 2210 err_usbd: 2211 usbd_transfer_unsetup(sc->sc_xfer, MUGE_N_TRANSFER); 2212 err: 2213 mtx_destroy(&sc->sc_mtx); 2214 return (ENXIO); 2215 } 2216 2217 /** 2218 * muge_detach - Detach the interface. 2219 * @dev: muge device handle 2220 * 2221 * RETURNS: 2222 * Returns 0. 2223 */ 2224 static int 2225 muge_detach(device_t dev) 2226 { 2227 2228 struct muge_softc *sc = device_get_softc(dev); 2229 struct usb_ether *ue = &sc->sc_ue; 2230 2231 usbd_transfer_unsetup(sc->sc_xfer, MUGE_N_TRANSFER); 2232 uether_ifdetach(ue); 2233 mtx_destroy(&sc->sc_mtx); 2234 2235 return (0); 2236 } 2237 2238 static device_method_t muge_methods[] = { 2239 /* Device interface */ 2240 DEVMETHOD(device_probe, muge_probe), 2241 DEVMETHOD(device_attach, muge_attach), 2242 DEVMETHOD(device_detach, muge_detach), 2243 2244 /* Bus interface */ 2245 DEVMETHOD(bus_print_child, bus_generic_print_child), 2246 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 2247 2248 /* MII interface */ 2249 DEVMETHOD(miibus_readreg, lan78xx_miibus_readreg), 2250 DEVMETHOD(miibus_writereg, lan78xx_miibus_writereg), 2251 DEVMETHOD(miibus_statchg, lan78xx_miibus_statchg), 2252 2253 DEVMETHOD_END 2254 }; 2255 2256 static driver_t muge_driver = { 2257 .name = "muge", 2258 .methods = muge_methods, 2259 .size = sizeof(struct muge_softc), 2260 }; 2261 2262 DRIVER_MODULE(muge, uhub, muge_driver, NULL, NULL); 2263 DRIVER_MODULE(miibus, muge, miibus_driver, NULL, NULL); 2264 MODULE_DEPEND(muge, uether, 1, 1, 1); 2265 MODULE_DEPEND(muge, usb, 1, 1, 1); 2266 MODULE_DEPEND(muge, ether, 1, 1, 1); 2267 MODULE_DEPEND(muge, miibus, 1, 1, 1); 2268 MODULE_VERSION(muge, 1); 2269 USB_PNP_HOST_INFO(lan78xx_devs); 2270