1 /* 2 * atusb.c - Driver for the ATUSB IEEE 802.15.4 dongle 3 * 4 * Written 2013 by Werner Almesberger <werner@almesberger.net> 5 * 6 * Copyright (c) 2015 - 2016 Stefan Schmidt <stefan@datenfreihafen.org> 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation, version 2 11 * 12 * Based on at86rf230.c and spi_atusb.c. 13 * at86rf230.c is 14 * Copyright (C) 2009 Siemens AG 15 * Written by: Dmitry Eremin-Solenikov <dmitry.baryshkov@siemens.com> 16 * 17 * spi_atusb.c is 18 * Copyright (c) 2011 Richard Sharpe <realrichardsharpe@gmail.com> 19 * Copyright (c) 2011 Stefan Schmidt <stefan@datenfreihafen.org> 20 * Copyright (c) 2011 Werner Almesberger <werner@almesberger.net> 21 * 22 * USB initialization is 23 * Copyright (c) 2013 Alexander Aring <alex.aring@gmail.com> 24 * 25 * Busware HUL support is 26 * Copyright (c) 2017 Josef Filzmaier <j.filzmaier@gmx.at> 27 */ 28 29 #include <linux/kernel.h> 30 #include <linux/slab.h> 31 #include <linux/module.h> 32 #include <linux/jiffies.h> 33 #include <linux/usb.h> 34 #include <linux/skbuff.h> 35 36 #include <net/cfg802154.h> 37 #include <net/mac802154.h> 38 39 #include "at86rf230.h" 40 #include "atusb.h" 41 42 #define ATUSB_JEDEC_ATMEL 0x1f /* JEDEC manufacturer ID */ 43 44 #define ATUSB_NUM_RX_URBS 4 /* allow for a bit of local latency */ 45 #define ATUSB_ALLOC_DELAY_MS 100 /* delay after failed allocation */ 46 #define ATUSB_TX_TIMEOUT_MS 200 /* on the air timeout */ 47 48 struct atusb { 49 struct ieee802154_hw *hw; 50 struct usb_device *usb_dev; 51 struct atusb_chip_data *data; 52 int shutdown; /* non-zero if shutting down */ 53 int err; /* set by first error */ 54 55 /* RX variables */ 56 struct delayed_work work; /* memory allocations */ 57 struct usb_anchor idle_urbs; /* URBs waiting to be submitted */ 58 struct usb_anchor rx_urbs; /* URBs waiting for reception */ 59 60 /* TX variables */ 61 struct usb_ctrlrequest tx_dr; 62 struct urb *tx_urb; 63 struct sk_buff *tx_skb; 64 u8 tx_ack_seq; /* current TX ACK sequence number */ 65 66 /* Firmware variable */ 67 unsigned char fw_ver_maj; /* Firmware major version number */ 68 unsigned char fw_ver_min; /* Firmware minor version number */ 69 unsigned char fw_hw_type; /* Firmware hardware type */ 70 }; 71 72 struct atusb_chip_data { 73 u16 t_channel_switch; 74 int rssi_base_val; 75 76 int (*set_channel)(struct ieee802154_hw*, u8, u8); 77 int (*set_txpower)(struct ieee802154_hw*, s32); 78 }; 79 80 /* ----- USB commands without data ----------------------------------------- */ 81 82 /* To reduce the number of error checks in the code, we record the first error 83 * in atusb->err and reject all subsequent requests until the error is cleared. 84 */ 85 86 static int atusb_control_msg(struct atusb *atusb, unsigned int pipe, 87 __u8 request, __u8 requesttype, 88 __u16 value, __u16 index, 89 void *data, __u16 size, int timeout) 90 { 91 struct usb_device *usb_dev = atusb->usb_dev; 92 int ret; 93 94 if (atusb->err) 95 return atusb->err; 96 97 ret = usb_control_msg(usb_dev, pipe, request, requesttype, 98 value, index, data, size, timeout); 99 if (ret < 0) { 100 atusb->err = ret; 101 dev_err(&usb_dev->dev, 102 "%s: req 0x%02x val 0x%x idx 0x%x, error %d\n", 103 __func__, request, value, index, ret); 104 } 105 return ret; 106 } 107 108 static int atusb_command(struct atusb *atusb, u8 cmd, u8 arg) 109 { 110 struct usb_device *usb_dev = atusb->usb_dev; 111 112 dev_dbg(&usb_dev->dev, "%s: cmd = 0x%x\n", __func__, cmd); 113 return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0), 114 cmd, ATUSB_REQ_TO_DEV, arg, 0, NULL, 0, 1000); 115 } 116 117 static int atusb_write_reg(struct atusb *atusb, u8 reg, u8 value) 118 { 119 struct usb_device *usb_dev = atusb->usb_dev; 120 121 dev_dbg(&usb_dev->dev, "%s: 0x%02x <- 0x%02x\n", __func__, reg, value); 122 return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0), 123 ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV, 124 value, reg, NULL, 0, 1000); 125 } 126 127 static int atusb_read_reg(struct atusb *atusb, u8 reg) 128 { 129 struct usb_device *usb_dev = atusb->usb_dev; 130 int ret; 131 u8 *buffer; 132 u8 value; 133 134 buffer = kmalloc(1, GFP_KERNEL); 135 if (!buffer) 136 return -ENOMEM; 137 138 dev_dbg(&usb_dev->dev, "%s: reg = 0x%x\n", __func__, reg); 139 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0), 140 ATUSB_REG_READ, ATUSB_REQ_FROM_DEV, 141 0, reg, buffer, 1, 1000); 142 143 if (ret >= 0) { 144 value = buffer[0]; 145 kfree(buffer); 146 return value; 147 } else { 148 kfree(buffer); 149 return ret; 150 } 151 } 152 153 static int atusb_write_subreg(struct atusb *atusb, u8 reg, u8 mask, 154 u8 shift, u8 value) 155 { 156 struct usb_device *usb_dev = atusb->usb_dev; 157 u8 orig, tmp; 158 int ret = 0; 159 160 dev_dbg(&usb_dev->dev, "%s: 0x%02x <- 0x%02x\n", __func__, reg, value); 161 162 orig = atusb_read_reg(atusb, reg); 163 164 /* Write the value only into that part of the register which is allowed 165 * by the mask. All other bits stay as before. 166 */ 167 tmp = orig & ~mask; 168 tmp |= (value << shift) & mask; 169 170 if (tmp != orig) 171 ret = atusb_write_reg(atusb, reg, tmp); 172 173 return ret; 174 } 175 176 static int atusb_read_subreg(struct atusb *lp, 177 unsigned int addr, unsigned int mask, 178 unsigned int shift) 179 { 180 int rc; 181 182 rc = atusb_read_reg(lp, addr); 183 rc = (rc & mask) >> shift; 184 185 return rc; 186 } 187 188 static int atusb_get_and_clear_error(struct atusb *atusb) 189 { 190 int err = atusb->err; 191 192 atusb->err = 0; 193 return err; 194 } 195 196 /* ----- skb allocation ---------------------------------------------------- */ 197 198 #define MAX_PSDU 127 199 #define MAX_RX_XFER (1 + MAX_PSDU + 2 + 1) /* PHR+PSDU+CRC+LQI */ 200 201 #define SKB_ATUSB(skb) (*(struct atusb **)(skb)->cb) 202 203 static void atusb_in(struct urb *urb); 204 205 static int atusb_submit_rx_urb(struct atusb *atusb, struct urb *urb) 206 { 207 struct usb_device *usb_dev = atusb->usb_dev; 208 struct sk_buff *skb = urb->context; 209 int ret; 210 211 if (!skb) { 212 skb = alloc_skb(MAX_RX_XFER, GFP_KERNEL); 213 if (!skb) { 214 dev_warn_ratelimited(&usb_dev->dev, 215 "atusb_in: can't allocate skb\n"); 216 return -ENOMEM; 217 } 218 skb_put(skb, MAX_RX_XFER); 219 SKB_ATUSB(skb) = atusb; 220 } 221 222 usb_fill_bulk_urb(urb, usb_dev, usb_rcvbulkpipe(usb_dev, 1), 223 skb->data, MAX_RX_XFER, atusb_in, skb); 224 usb_anchor_urb(urb, &atusb->rx_urbs); 225 226 ret = usb_submit_urb(urb, GFP_KERNEL); 227 if (ret) { 228 usb_unanchor_urb(urb); 229 kfree_skb(skb); 230 urb->context = NULL; 231 } 232 return ret; 233 } 234 235 static void atusb_work_urbs(struct work_struct *work) 236 { 237 struct atusb *atusb = 238 container_of(to_delayed_work(work), struct atusb, work); 239 struct usb_device *usb_dev = atusb->usb_dev; 240 struct urb *urb; 241 int ret; 242 243 if (atusb->shutdown) 244 return; 245 246 do { 247 urb = usb_get_from_anchor(&atusb->idle_urbs); 248 if (!urb) 249 return; 250 ret = atusb_submit_rx_urb(atusb, urb); 251 } while (!ret); 252 253 usb_anchor_urb(urb, &atusb->idle_urbs); 254 dev_warn_ratelimited(&usb_dev->dev, 255 "atusb_in: can't allocate/submit URB (%d)\n", ret); 256 schedule_delayed_work(&atusb->work, 257 msecs_to_jiffies(ATUSB_ALLOC_DELAY_MS) + 1); 258 } 259 260 /* ----- Asynchronous USB -------------------------------------------------- */ 261 262 static void atusb_tx_done(struct atusb *atusb, u8 seq) 263 { 264 struct usb_device *usb_dev = atusb->usb_dev; 265 u8 expect = atusb->tx_ack_seq; 266 267 dev_dbg(&usb_dev->dev, "%s (0x%02x/0x%02x)\n", __func__, seq, expect); 268 if (seq == expect) { 269 /* TODO check for ifs handling in firmware */ 270 ieee802154_xmit_complete(atusb->hw, atusb->tx_skb, false); 271 } else { 272 /* TODO I experience this case when atusb has a tx complete 273 * irq before probing, we should fix the firmware it's an 274 * unlikely case now that seq == expect is then true, but can 275 * happen and fail with a tx_skb = NULL; 276 */ 277 ieee802154_wake_queue(atusb->hw); 278 if (atusb->tx_skb) 279 dev_kfree_skb_irq(atusb->tx_skb); 280 } 281 } 282 283 static void atusb_in_good(struct urb *urb) 284 { 285 struct usb_device *usb_dev = urb->dev; 286 struct sk_buff *skb = urb->context; 287 struct atusb *atusb = SKB_ATUSB(skb); 288 u8 len, lqi; 289 290 if (!urb->actual_length) { 291 dev_dbg(&usb_dev->dev, "atusb_in: zero-sized URB ?\n"); 292 return; 293 } 294 295 len = *skb->data; 296 297 if (urb->actual_length == 1) { 298 atusb_tx_done(atusb, len); 299 return; 300 } 301 302 if (len + 1 > urb->actual_length - 1) { 303 dev_dbg(&usb_dev->dev, "atusb_in: frame len %d+1 > URB %u-1\n", 304 len, urb->actual_length); 305 return; 306 } 307 308 if (!ieee802154_is_valid_psdu_len(len)) { 309 dev_dbg(&usb_dev->dev, "atusb_in: frame corrupted\n"); 310 return; 311 } 312 313 lqi = skb->data[len + 1]; 314 dev_dbg(&usb_dev->dev, "atusb_in: rx len %d lqi 0x%02x\n", len, lqi); 315 skb_pull(skb, 1); /* remove PHR */ 316 skb_trim(skb, len); /* get payload only */ 317 ieee802154_rx_irqsafe(atusb->hw, skb, lqi); 318 urb->context = NULL; /* skb is gone */ 319 } 320 321 static void atusb_in(struct urb *urb) 322 { 323 struct usb_device *usb_dev = urb->dev; 324 struct sk_buff *skb = urb->context; 325 struct atusb *atusb = SKB_ATUSB(skb); 326 327 dev_dbg(&usb_dev->dev, "%s: status %d len %d\n", __func__, 328 urb->status, urb->actual_length); 329 if (urb->status) { 330 if (urb->status == -ENOENT) { /* being killed */ 331 kfree_skb(skb); 332 urb->context = NULL; 333 return; 334 } 335 dev_dbg(&usb_dev->dev, "%s: URB error %d\n", __func__, urb->status); 336 } else { 337 atusb_in_good(urb); 338 } 339 340 usb_anchor_urb(urb, &atusb->idle_urbs); 341 if (!atusb->shutdown) 342 schedule_delayed_work(&atusb->work, 0); 343 } 344 345 /* ----- URB allocation/deallocation --------------------------------------- */ 346 347 static void atusb_free_urbs(struct atusb *atusb) 348 { 349 struct urb *urb; 350 351 while (1) { 352 urb = usb_get_from_anchor(&atusb->idle_urbs); 353 if (!urb) 354 break; 355 kfree_skb(urb->context); 356 usb_free_urb(urb); 357 } 358 } 359 360 static int atusb_alloc_urbs(struct atusb *atusb, int n) 361 { 362 struct urb *urb; 363 364 while (n) { 365 urb = usb_alloc_urb(0, GFP_KERNEL); 366 if (!urb) { 367 atusb_free_urbs(atusb); 368 return -ENOMEM; 369 } 370 usb_anchor_urb(urb, &atusb->idle_urbs); 371 n--; 372 } 373 return 0; 374 } 375 376 /* ----- IEEE 802.15.4 interface operations -------------------------------- */ 377 378 static void atusb_xmit_complete(struct urb *urb) 379 { 380 dev_dbg(&urb->dev->dev, "atusb_xmit urb completed"); 381 } 382 383 static int atusb_xmit(struct ieee802154_hw *hw, struct sk_buff *skb) 384 { 385 struct atusb *atusb = hw->priv; 386 struct usb_device *usb_dev = atusb->usb_dev; 387 int ret; 388 389 dev_dbg(&usb_dev->dev, "%s (%d)\n", __func__, skb->len); 390 atusb->tx_skb = skb; 391 atusb->tx_ack_seq++; 392 atusb->tx_dr.wIndex = cpu_to_le16(atusb->tx_ack_seq); 393 atusb->tx_dr.wLength = cpu_to_le16(skb->len); 394 395 usb_fill_control_urb(atusb->tx_urb, usb_dev, 396 usb_sndctrlpipe(usb_dev, 0), 397 (unsigned char *)&atusb->tx_dr, skb->data, 398 skb->len, atusb_xmit_complete, NULL); 399 ret = usb_submit_urb(atusb->tx_urb, GFP_ATOMIC); 400 dev_dbg(&usb_dev->dev, "%s done (%d)\n", __func__, ret); 401 return ret; 402 } 403 404 static int atusb_ed(struct ieee802154_hw *hw, u8 *level) 405 { 406 WARN_ON(!level); 407 *level = 0xbe; 408 return 0; 409 } 410 411 static int atusb_set_hw_addr_filt(struct ieee802154_hw *hw, 412 struct ieee802154_hw_addr_filt *filt, 413 unsigned long changed) 414 { 415 struct atusb *atusb = hw->priv; 416 struct device *dev = &atusb->usb_dev->dev; 417 418 if (changed & IEEE802154_AFILT_SADDR_CHANGED) { 419 u16 addr = le16_to_cpu(filt->short_addr); 420 421 dev_vdbg(dev, "%s called for saddr\n", __func__); 422 atusb_write_reg(atusb, RG_SHORT_ADDR_0, addr); 423 atusb_write_reg(atusb, RG_SHORT_ADDR_1, addr >> 8); 424 } 425 426 if (changed & IEEE802154_AFILT_PANID_CHANGED) { 427 u16 pan = le16_to_cpu(filt->pan_id); 428 429 dev_vdbg(dev, "%s called for pan id\n", __func__); 430 atusb_write_reg(atusb, RG_PAN_ID_0, pan); 431 atusb_write_reg(atusb, RG_PAN_ID_1, pan >> 8); 432 } 433 434 if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) { 435 u8 i, addr[IEEE802154_EXTENDED_ADDR_LEN]; 436 437 memcpy(addr, &filt->ieee_addr, IEEE802154_EXTENDED_ADDR_LEN); 438 dev_vdbg(dev, "%s called for IEEE addr\n", __func__); 439 for (i = 0; i < 8; i++) 440 atusb_write_reg(atusb, RG_IEEE_ADDR_0 + i, addr[i]); 441 } 442 443 if (changed & IEEE802154_AFILT_PANC_CHANGED) { 444 dev_vdbg(dev, "%s called for panc change\n", __func__); 445 if (filt->pan_coord) 446 atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 1); 447 else 448 atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 0); 449 } 450 451 return atusb_get_and_clear_error(atusb); 452 } 453 454 static int atusb_start(struct ieee802154_hw *hw) 455 { 456 struct atusb *atusb = hw->priv; 457 struct usb_device *usb_dev = atusb->usb_dev; 458 int ret; 459 460 dev_dbg(&usb_dev->dev, "%s\n", __func__); 461 schedule_delayed_work(&atusb->work, 0); 462 atusb_command(atusb, ATUSB_RX_MODE, 1); 463 ret = atusb_get_and_clear_error(atusb); 464 if (ret < 0) 465 usb_kill_anchored_urbs(&atusb->idle_urbs); 466 return ret; 467 } 468 469 static void atusb_stop(struct ieee802154_hw *hw) 470 { 471 struct atusb *atusb = hw->priv; 472 struct usb_device *usb_dev = atusb->usb_dev; 473 474 dev_dbg(&usb_dev->dev, "%s\n", __func__); 475 usb_kill_anchored_urbs(&atusb->idle_urbs); 476 atusb_command(atusb, ATUSB_RX_MODE, 0); 477 atusb_get_and_clear_error(atusb); 478 } 479 480 #define ATUSB_MAX_TX_POWERS 0xF 481 static const s32 atusb_powers[ATUSB_MAX_TX_POWERS + 1] = { 482 300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700, 483 -900, -1200, -1700, 484 }; 485 486 static int 487 atusb_txpower(struct ieee802154_hw *hw, s32 mbm) 488 { 489 struct atusb *atusb = hw->priv; 490 491 if (atusb->data) 492 return atusb->data->set_txpower(hw, mbm); 493 else 494 return -ENOTSUPP; 495 } 496 497 static int 498 atusb_set_txpower(struct ieee802154_hw *hw, s32 mbm) 499 { 500 struct atusb *atusb = hw->priv; 501 u32 i; 502 503 for (i = 0; i < hw->phy->supported.tx_powers_size; i++) { 504 if (hw->phy->supported.tx_powers[i] == mbm) 505 return atusb_write_subreg(atusb, SR_TX_PWR_23X, i); 506 } 507 508 return -EINVAL; 509 } 510 511 static int 512 hulusb_set_txpower(struct ieee802154_hw *hw, s32 mbm) 513 { 514 u32 i; 515 516 for (i = 0; i < hw->phy->supported.tx_powers_size; i++) { 517 if (hw->phy->supported.tx_powers[i] == mbm) 518 return atusb_write_subreg(hw->priv, SR_TX_PWR_212, i); 519 } 520 521 return -EINVAL; 522 } 523 524 #define ATUSB_MAX_ED_LEVELS 0xF 525 static const s32 atusb_ed_levels[ATUSB_MAX_ED_LEVELS + 1] = { 526 -9100, -8900, -8700, -8500, -8300, -8100, -7900, -7700, -7500, -7300, 527 -7100, -6900, -6700, -6500, -6300, -6100, 528 }; 529 530 #define AT86RF212_MAX_TX_POWERS 0x1F 531 static const s32 at86rf212_powers[AT86RF212_MAX_TX_POWERS + 1] = { 532 500, 400, 300, 200, 100, 0, -100, -200, -300, -400, -500, -600, -700, 533 -800, -900, -1000, -1100, -1200, -1300, -1400, -1500, -1600, -1700, 534 -1800, -1900, -2000, -2100, -2200, -2300, -2400, -2500, -2600, 535 }; 536 537 #define AT86RF2XX_MAX_ED_LEVELS 0xF 538 static const s32 at86rf212_ed_levels_100[AT86RF2XX_MAX_ED_LEVELS + 1] = { 539 -10000, -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200, 540 -8000, -7800, -7600, -7400, -7200, -7000, 541 }; 542 543 static const s32 at86rf212_ed_levels_98[AT86RF2XX_MAX_ED_LEVELS + 1] = { 544 -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000, 545 -7800, -7600, -7400, -7200, -7000, -6800, 546 }; 547 548 static int 549 atusb_set_cca_mode(struct ieee802154_hw *hw, const struct wpan_phy_cca *cca) 550 { 551 struct atusb *atusb = hw->priv; 552 u8 val; 553 554 /* mapping 802.15.4 to driver spec */ 555 switch (cca->mode) { 556 case NL802154_CCA_ENERGY: 557 val = 1; 558 break; 559 case NL802154_CCA_CARRIER: 560 val = 2; 561 break; 562 case NL802154_CCA_ENERGY_CARRIER: 563 switch (cca->opt) { 564 case NL802154_CCA_OPT_ENERGY_CARRIER_AND: 565 val = 3; 566 break; 567 case NL802154_CCA_OPT_ENERGY_CARRIER_OR: 568 val = 0; 569 break; 570 default: 571 return -EINVAL; 572 } 573 break; 574 default: 575 return -EINVAL; 576 } 577 578 return atusb_write_subreg(atusb, SR_CCA_MODE, val); 579 } 580 581 static int hulusb_set_cca_ed_level(struct atusb *lp, int rssi_base_val) 582 { 583 unsigned int cca_ed_thres; 584 585 cca_ed_thres = atusb_read_subreg(lp, SR_CCA_ED_THRES); 586 587 switch (rssi_base_val) { 588 case -98: 589 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_98; 590 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_98); 591 lp->hw->phy->cca_ed_level = at86rf212_ed_levels_98[cca_ed_thres]; 592 break; 593 case -100: 594 lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100; 595 lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100); 596 lp->hw->phy->cca_ed_level = at86rf212_ed_levels_100[cca_ed_thres]; 597 break; 598 default: 599 WARN_ON(1); 600 } 601 602 return 0; 603 } 604 605 static int 606 atusb_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm) 607 { 608 struct atusb *atusb = hw->priv; 609 u32 i; 610 611 for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) { 612 if (hw->phy->supported.cca_ed_levels[i] == mbm) 613 return atusb_write_subreg(atusb, SR_CCA_ED_THRES, i); 614 } 615 616 return -EINVAL; 617 } 618 619 static int atusb_channel(struct ieee802154_hw *hw, u8 page, u8 channel) 620 { 621 struct atusb *atusb = hw->priv; 622 int ret = -ENOTSUPP; 623 624 if (atusb->data) { 625 ret = atusb->data->set_channel(hw, page, channel); 626 /* @@@ ugly synchronization */ 627 msleep(atusb->data->t_channel_switch); 628 } 629 630 return ret; 631 } 632 633 static int atusb_set_channel(struct ieee802154_hw *hw, u8 page, u8 channel) 634 { 635 struct atusb *atusb = hw->priv; 636 int ret; 637 638 ret = atusb_write_subreg(atusb, SR_CHANNEL, channel); 639 if (ret < 0) 640 return ret; 641 return 0; 642 } 643 644 static int hulusb_set_channel(struct ieee802154_hw *hw, u8 page, u8 channel) 645 { 646 int rc; 647 int rssi_base_val; 648 649 struct atusb *lp = hw->priv; 650 651 if (channel == 0) 652 rc = atusb_write_subreg(lp, SR_SUB_MODE, 0); 653 else 654 rc = atusb_write_subreg(lp, SR_SUB_MODE, 1); 655 if (rc < 0) 656 return rc; 657 658 if (page == 0) { 659 rc = atusb_write_subreg(lp, SR_BPSK_QPSK, 0); 660 rssi_base_val = -100; 661 } else { 662 rc = atusb_write_subreg(lp, SR_BPSK_QPSK, 1); 663 rssi_base_val = -98; 664 } 665 if (rc < 0) 666 return rc; 667 668 rc = hulusb_set_cca_ed_level(lp, rssi_base_val); 669 if (rc < 0) 670 return rc; 671 672 /* This sets the symbol_duration according frequency on the 212. 673 * TODO move this handling while set channel and page in cfg802154. 674 * We can do that, this timings are according 802.15.4 standard. 675 * If we do that in cfg802154, this is a more generic calculation. 676 * 677 * This should also protected from ifs_timer. Means cancel timer and 678 * init with a new value. For now, this is okay. 679 */ 680 if (channel == 0) { 681 if (page == 0) { 682 /* SUB:0 and BPSK:0 -> BPSK-20 */ 683 lp->hw->phy->symbol_duration = 50; 684 } else { 685 /* SUB:1 and BPSK:0 -> BPSK-40 */ 686 lp->hw->phy->symbol_duration = 25; 687 } 688 } else { 689 if (page == 0) 690 /* SUB:0 and BPSK:1 -> OQPSK-100/200/400 */ 691 lp->hw->phy->symbol_duration = 40; 692 else 693 /* SUB:1 and BPSK:1 -> OQPSK-250/500/1000 */ 694 lp->hw->phy->symbol_duration = 16; 695 } 696 697 lp->hw->phy->lifs_period = IEEE802154_LIFS_PERIOD * 698 lp->hw->phy->symbol_duration; 699 lp->hw->phy->sifs_period = IEEE802154_SIFS_PERIOD * 700 lp->hw->phy->symbol_duration; 701 702 return atusb_write_subreg(lp, SR_CHANNEL, channel); 703 } 704 705 static int 706 atusb_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be, u8 retries) 707 { 708 struct atusb *atusb = hw->priv; 709 int ret; 710 711 ret = atusb_write_subreg(atusb, SR_MIN_BE, min_be); 712 if (ret) 713 return ret; 714 715 ret = atusb_write_subreg(atusb, SR_MAX_BE, max_be); 716 if (ret) 717 return ret; 718 719 return atusb_write_subreg(atusb, SR_MAX_CSMA_RETRIES, retries); 720 } 721 722 static int 723 hulusb_set_lbt(struct ieee802154_hw *hw, bool on) 724 { 725 struct atusb *atusb = hw->priv; 726 727 return atusb_write_subreg(atusb, SR_CSMA_LBT_MODE, on); 728 } 729 730 static int 731 atusb_set_frame_retries(struct ieee802154_hw *hw, s8 retries) 732 { 733 struct atusb *atusb = hw->priv; 734 735 return atusb_write_subreg(atusb, SR_MAX_FRAME_RETRIES, retries); 736 } 737 738 static int 739 atusb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on) 740 { 741 struct atusb *atusb = hw->priv; 742 int ret; 743 744 if (on) { 745 ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 1); 746 if (ret < 0) 747 return ret; 748 749 ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 1); 750 if (ret < 0) 751 return ret; 752 } else { 753 ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 0); 754 if (ret < 0) 755 return ret; 756 757 ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 0); 758 if (ret < 0) 759 return ret; 760 } 761 762 return 0; 763 } 764 765 static struct atusb_chip_data atusb_chip_data = { 766 .t_channel_switch = 1, 767 .rssi_base_val = -91, 768 .set_txpower = atusb_set_txpower, 769 .set_channel = atusb_set_channel, 770 }; 771 772 static struct atusb_chip_data hulusb_chip_data = { 773 .t_channel_switch = 11, 774 .rssi_base_val = -100, 775 .set_txpower = hulusb_set_txpower, 776 .set_channel = hulusb_set_channel, 777 }; 778 779 static const struct ieee802154_ops atusb_ops = { 780 .owner = THIS_MODULE, 781 .xmit_async = atusb_xmit, 782 .ed = atusb_ed, 783 .set_channel = atusb_channel, 784 .start = atusb_start, 785 .stop = atusb_stop, 786 .set_hw_addr_filt = atusb_set_hw_addr_filt, 787 .set_txpower = atusb_txpower, 788 .set_lbt = hulusb_set_lbt, 789 .set_cca_mode = atusb_set_cca_mode, 790 .set_cca_ed_level = atusb_set_cca_ed_level, 791 .set_csma_params = atusb_set_csma_params, 792 .set_frame_retries = atusb_set_frame_retries, 793 .set_promiscuous_mode = atusb_set_promiscuous_mode, 794 }; 795 796 /* ----- Firmware and chip version information ----------------------------- */ 797 798 static int atusb_get_and_show_revision(struct atusb *atusb) 799 { 800 struct usb_device *usb_dev = atusb->usb_dev; 801 char *hw_name; 802 unsigned char *buffer; 803 int ret; 804 805 buffer = kmalloc(3, GFP_KERNEL); 806 if (!buffer) 807 return -ENOMEM; 808 809 /* Get a couple of the ATMega Firmware values */ 810 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0), 811 ATUSB_ID, ATUSB_REQ_FROM_DEV, 0, 0, 812 buffer, 3, 1000); 813 if (ret >= 0) { 814 atusb->fw_ver_maj = buffer[0]; 815 atusb->fw_ver_min = buffer[1]; 816 atusb->fw_hw_type = buffer[2]; 817 818 switch (atusb->fw_hw_type) { 819 case ATUSB_HW_TYPE_100813: 820 case ATUSB_HW_TYPE_101216: 821 case ATUSB_HW_TYPE_110131: 822 hw_name = "ATUSB"; 823 atusb->data = &atusb_chip_data; 824 break; 825 case ATUSB_HW_TYPE_RZUSB: 826 hw_name = "RZUSB"; 827 atusb->data = &atusb_chip_data; 828 break; 829 case ATUSB_HW_TYPE_HULUSB: 830 hw_name = "HULUSB"; 831 atusb->data = &hulusb_chip_data; 832 break; 833 default: 834 hw_name = "UNKNOWN"; 835 atusb->err = -ENOTSUPP; 836 ret = -ENOTSUPP; 837 break; 838 } 839 840 dev_info(&usb_dev->dev, 841 "Firmware: major: %u, minor: %u, hardware type: %s (%d)\n", 842 atusb->fw_ver_maj, atusb->fw_ver_min, hw_name, 843 atusb->fw_hw_type); 844 } 845 if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 2) { 846 dev_info(&usb_dev->dev, 847 "Firmware version (%u.%u) predates our first public release.", 848 atusb->fw_ver_maj, atusb->fw_ver_min); 849 dev_info(&usb_dev->dev, "Please update to version 0.2 or newer"); 850 } 851 852 kfree(buffer); 853 return ret; 854 } 855 856 static int atusb_get_and_show_build(struct atusb *atusb) 857 { 858 struct usb_device *usb_dev = atusb->usb_dev; 859 char *build; 860 int ret; 861 862 build = kmalloc(ATUSB_BUILD_SIZE + 1, GFP_KERNEL); 863 if (!build) 864 return -ENOMEM; 865 866 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0), 867 ATUSB_BUILD, ATUSB_REQ_FROM_DEV, 0, 0, 868 build, ATUSB_BUILD_SIZE, 1000); 869 if (ret >= 0) { 870 build[ret] = 0; 871 dev_info(&usb_dev->dev, "Firmware: build %s\n", build); 872 } 873 874 kfree(build); 875 return ret; 876 } 877 878 static int atusb_get_and_conf_chip(struct atusb *atusb) 879 { 880 struct usb_device *usb_dev = atusb->usb_dev; 881 u8 man_id_0, man_id_1, part_num, version_num; 882 const char *chip; 883 struct ieee802154_hw *hw = atusb->hw; 884 885 man_id_0 = atusb_read_reg(atusb, RG_MAN_ID_0); 886 man_id_1 = atusb_read_reg(atusb, RG_MAN_ID_1); 887 part_num = atusb_read_reg(atusb, RG_PART_NUM); 888 version_num = atusb_read_reg(atusb, RG_VERSION_NUM); 889 890 if (atusb->err) 891 return atusb->err; 892 893 hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT | 894 IEEE802154_HW_PROMISCUOUS | IEEE802154_HW_CSMA_PARAMS; 895 896 hw->phy->flags = WPAN_PHY_FLAG_TXPOWER | WPAN_PHY_FLAG_CCA_ED_LEVEL | 897 WPAN_PHY_FLAG_CCA_MODE; 898 899 hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) | 900 BIT(NL802154_CCA_CARRIER) | 901 BIT(NL802154_CCA_ENERGY_CARRIER); 902 hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) | 903 BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR); 904 905 hw->phy->cca.mode = NL802154_CCA_ENERGY; 906 907 hw->phy->current_page = 0; 908 909 if ((man_id_1 << 8 | man_id_0) != ATUSB_JEDEC_ATMEL) { 910 dev_err(&usb_dev->dev, 911 "non-Atmel transceiver xxxx%02x%02x\n", 912 man_id_1, man_id_0); 913 goto fail; 914 } 915 916 switch (part_num) { 917 case 2: 918 chip = "AT86RF230"; 919 atusb->hw->phy->supported.channels[0] = 0x7FFF800; 920 atusb->hw->phy->current_channel = 11; /* reset default */ 921 atusb->hw->phy->symbol_duration = 16; 922 atusb->hw->phy->supported.tx_powers = atusb_powers; 923 atusb->hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers); 924 hw->phy->supported.cca_ed_levels = atusb_ed_levels; 925 hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(atusb_ed_levels); 926 break; 927 case 3: 928 chip = "AT86RF231"; 929 atusb->hw->phy->supported.channels[0] = 0x7FFF800; 930 atusb->hw->phy->current_channel = 11; /* reset default */ 931 atusb->hw->phy->symbol_duration = 16; 932 atusb->hw->phy->supported.tx_powers = atusb_powers; 933 atusb->hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers); 934 hw->phy->supported.cca_ed_levels = atusb_ed_levels; 935 hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(atusb_ed_levels); 936 break; 937 case 7: 938 chip = "AT86RF212"; 939 atusb->hw->flags |= IEEE802154_HW_LBT; 940 atusb->hw->phy->supported.channels[0] = 0x00007FF; 941 atusb->hw->phy->supported.channels[2] = 0x00007FF; 942 atusb->hw->phy->current_channel = 5; 943 atusb->hw->phy->symbol_duration = 25; 944 atusb->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH; 945 atusb->hw->phy->supported.tx_powers = at86rf212_powers; 946 atusb->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers); 947 atusb->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100; 948 atusb->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100); 949 break; 950 default: 951 dev_err(&usb_dev->dev, 952 "unexpected transceiver, part 0x%02x version 0x%02x\n", 953 part_num, version_num); 954 goto fail; 955 } 956 957 hw->phy->transmit_power = hw->phy->supported.tx_powers[0]; 958 hw->phy->cca_ed_level = hw->phy->supported.cca_ed_levels[7]; 959 960 dev_info(&usb_dev->dev, "ATUSB: %s version %d\n", chip, version_num); 961 962 return 0; 963 964 fail: 965 atusb->err = -ENODEV; 966 return -ENODEV; 967 } 968 969 static int atusb_set_extended_addr(struct atusb *atusb) 970 { 971 struct usb_device *usb_dev = atusb->usb_dev; 972 unsigned char *buffer; 973 __le64 extended_addr; 974 u64 addr; 975 int ret; 976 977 /* Firmware versions before 0.3 do not support the EUI64_READ command. 978 * Just use a random address and be done. 979 */ 980 if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 3) { 981 ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr); 982 return 0; 983 } 984 985 buffer = kmalloc(IEEE802154_EXTENDED_ADDR_LEN, GFP_KERNEL); 986 if (!buffer) 987 return -ENOMEM; 988 989 /* Firmware is new enough so we fetch the address from EEPROM */ 990 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0), 991 ATUSB_EUI64_READ, ATUSB_REQ_FROM_DEV, 0, 0, 992 buffer, IEEE802154_EXTENDED_ADDR_LEN, 1000); 993 if (ret < 0) { 994 dev_err(&usb_dev->dev, "failed to fetch extended address, random address set\n"); 995 ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr); 996 kfree(buffer); 997 return ret; 998 } 999 1000 memcpy(&extended_addr, buffer, IEEE802154_EXTENDED_ADDR_LEN); 1001 /* Check if read address is not empty and the unicast bit is set correctly */ 1002 if (!ieee802154_is_valid_extended_unicast_addr(extended_addr)) { 1003 dev_info(&usb_dev->dev, "no permanent extended address found, random address set\n"); 1004 ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr); 1005 } else { 1006 atusb->hw->phy->perm_extended_addr = extended_addr; 1007 addr = swab64((__force u64)atusb->hw->phy->perm_extended_addr); 1008 dev_info(&usb_dev->dev, "Read permanent extended address %8phC from device\n", 1009 &addr); 1010 } 1011 1012 kfree(buffer); 1013 return ret; 1014 } 1015 1016 /* ----- Setup ------------------------------------------------------------- */ 1017 1018 static int atusb_probe(struct usb_interface *interface, 1019 const struct usb_device_id *id) 1020 { 1021 struct usb_device *usb_dev = interface_to_usbdev(interface); 1022 struct ieee802154_hw *hw; 1023 struct atusb *atusb = NULL; 1024 int ret = -ENOMEM; 1025 1026 hw = ieee802154_alloc_hw(sizeof(struct atusb), &atusb_ops); 1027 if (!hw) 1028 return -ENOMEM; 1029 1030 atusb = hw->priv; 1031 atusb->hw = hw; 1032 atusb->usb_dev = usb_get_dev(usb_dev); 1033 usb_set_intfdata(interface, atusb); 1034 1035 atusb->shutdown = 0; 1036 atusb->err = 0; 1037 INIT_DELAYED_WORK(&atusb->work, atusb_work_urbs); 1038 init_usb_anchor(&atusb->idle_urbs); 1039 init_usb_anchor(&atusb->rx_urbs); 1040 1041 if (atusb_alloc_urbs(atusb, ATUSB_NUM_RX_URBS)) 1042 goto fail; 1043 1044 atusb->tx_dr.bRequestType = ATUSB_REQ_TO_DEV; 1045 atusb->tx_dr.bRequest = ATUSB_TX; 1046 atusb->tx_dr.wValue = cpu_to_le16(0); 1047 1048 atusb->tx_urb = usb_alloc_urb(0, GFP_KERNEL); 1049 if (!atusb->tx_urb) 1050 goto fail; 1051 1052 hw->parent = &usb_dev->dev; 1053 1054 atusb_command(atusb, ATUSB_RF_RESET, 0); 1055 atusb_get_and_conf_chip(atusb); 1056 atusb_get_and_show_revision(atusb); 1057 atusb_get_and_show_build(atusb); 1058 atusb_set_extended_addr(atusb); 1059 1060 if ((atusb->fw_ver_maj == 0 && atusb->fw_ver_min >= 3) || atusb->fw_ver_maj > 0) 1061 hw->flags |= IEEE802154_HW_FRAME_RETRIES; 1062 1063 ret = atusb_get_and_clear_error(atusb); 1064 if (ret) { 1065 dev_err(&atusb->usb_dev->dev, 1066 "%s: initialization failed, error = %d\n", 1067 __func__, ret); 1068 goto fail; 1069 } 1070 1071 ret = ieee802154_register_hw(hw); 1072 if (ret) 1073 goto fail; 1074 1075 /* If we just powered on, we're now in P_ON and need to enter TRX_OFF 1076 * explicitly. Any resets after that will send us straight to TRX_OFF, 1077 * making the command below redundant. 1078 */ 1079 atusb_write_reg(atusb, RG_TRX_STATE, STATE_FORCE_TRX_OFF); 1080 msleep(1); /* reset => TRX_OFF, tTR13 = 37 us */ 1081 1082 #if 0 1083 /* Calculating the maximum time available to empty the frame buffer 1084 * on reception: 1085 * 1086 * According to [1], the inter-frame gap is 1087 * R * 20 * 16 us + 128 us 1088 * where R is a random number from 0 to 7. Furthermore, we have 20 bit 1089 * times (80 us at 250 kbps) of SHR of the next frame before the 1090 * transceiver begins storing data in the frame buffer. 1091 * 1092 * This yields a minimum time of 208 us between the last data of a 1093 * frame and the first data of the next frame. This time is further 1094 * reduced by interrupt latency in the atusb firmware. 1095 * 1096 * atusb currently needs about 500 us to retrieve a maximum-sized 1097 * frame. We therefore have to allow reception of a new frame to begin 1098 * while we retrieve the previous frame. 1099 * 1100 * [1] "JN-AN-1035 Calculating data rates in an IEEE 802.15.4-based 1101 * network", Jennic 2006. 1102 * http://www.jennic.com/download_file.php?supportFile=JN-AN-1035%20Calculating%20802-15-4%20Data%20Rates-1v0.pdf 1103 */ 1104 1105 atusb_write_subreg(atusb, SR_RX_SAFE_MODE, 1); 1106 #endif 1107 atusb_write_reg(atusb, RG_IRQ_MASK, 0xff); 1108 1109 ret = atusb_get_and_clear_error(atusb); 1110 if (!ret) 1111 return 0; 1112 1113 dev_err(&atusb->usb_dev->dev, 1114 "%s: setup failed, error = %d\n", 1115 __func__, ret); 1116 1117 ieee802154_unregister_hw(hw); 1118 fail: 1119 atusb_free_urbs(atusb); 1120 usb_kill_urb(atusb->tx_urb); 1121 usb_free_urb(atusb->tx_urb); 1122 usb_put_dev(usb_dev); 1123 ieee802154_free_hw(hw); 1124 return ret; 1125 } 1126 1127 static void atusb_disconnect(struct usb_interface *interface) 1128 { 1129 struct atusb *atusb = usb_get_intfdata(interface); 1130 1131 dev_dbg(&atusb->usb_dev->dev, "%s\n", __func__); 1132 1133 atusb->shutdown = 1; 1134 cancel_delayed_work_sync(&atusb->work); 1135 1136 usb_kill_anchored_urbs(&atusb->rx_urbs); 1137 atusb_free_urbs(atusb); 1138 usb_kill_urb(atusb->tx_urb); 1139 usb_free_urb(atusb->tx_urb); 1140 1141 ieee802154_unregister_hw(atusb->hw); 1142 1143 ieee802154_free_hw(atusb->hw); 1144 1145 usb_set_intfdata(interface, NULL); 1146 usb_put_dev(atusb->usb_dev); 1147 1148 pr_debug("%s done\n", __func__); 1149 } 1150 1151 /* The devices we work with */ 1152 static const struct usb_device_id atusb_device_table[] = { 1153 { 1154 .match_flags = USB_DEVICE_ID_MATCH_DEVICE | 1155 USB_DEVICE_ID_MATCH_INT_INFO, 1156 .idVendor = ATUSB_VENDOR_ID, 1157 .idProduct = ATUSB_PRODUCT_ID, 1158 .bInterfaceClass = USB_CLASS_VENDOR_SPEC 1159 }, 1160 /* end with null element */ 1161 {} 1162 }; 1163 MODULE_DEVICE_TABLE(usb, atusb_device_table); 1164 1165 static struct usb_driver atusb_driver = { 1166 .name = "atusb", 1167 .probe = atusb_probe, 1168 .disconnect = atusb_disconnect, 1169 .id_table = atusb_device_table, 1170 }; 1171 module_usb_driver(atusb_driver); 1172 1173 MODULE_AUTHOR("Alexander Aring <alex.aring@gmail.com>"); 1174 MODULE_AUTHOR("Richard Sharpe <realrichardsharpe@gmail.com>"); 1175 MODULE_AUTHOR("Stefan Schmidt <stefan@datenfreihafen.org>"); 1176 MODULE_AUTHOR("Werner Almesberger <werner@almesberger.net>"); 1177 MODULE_AUTHOR("Josef Filzmaier <j.filzmaier@gmx.at>"); 1178 MODULE_DESCRIPTION("ATUSB IEEE 802.15.4 Driver"); 1179 MODULE_LICENSE("GPL"); 1180