2 * atusb.c - Driver for the ATUSB IEEE 802.15.4 dongle
4 * Written 2013 by Werner Almesberger <werner@almesberger.net>
6 * Copyright (c) 2015 - 2016 Stefan Schmidt <stefan@datenfreihafen.org>
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
12 * Based on at86rf230.c and spi_atusb.c.
14 * Copyright (C) 2009 Siemens AG
15 * Written by: Dmitry Eremin-Solenikov <dmitry.baryshkov@siemens.com>
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>
22 * USB initialization is
23 * Copyright (c) 2013 Alexander Aring <alex.aring@gmail.com>
26 #include <linux/kernel.h>
27 #include <linux/slab.h>
28 #include <linux/module.h>
29 #include <linux/jiffies.h>
30 #include <linux/usb.h>
31 #include <linux/skbuff.h>
33 #include <net/cfg802154.h>
34 #include <net/mac802154.h>
36 #include "at86rf230.h"
39 #define ATUSB_JEDEC_ATMEL 0x1f /* JEDEC manufacturer ID */
41 #define ATUSB_NUM_RX_URBS 4 /* allow for a bit of local latency */
42 #define ATUSB_ALLOC_DELAY_MS 100 /* delay after failed allocation */
43 #define ATUSB_TX_TIMEOUT_MS 200 /* on the air timeout */
46 struct ieee802154_hw *hw;
47 struct usb_device *usb_dev;
48 int shutdown; /* non-zero if shutting down */
49 int err; /* set by first error */
52 struct delayed_work work; /* memory allocations */
53 struct usb_anchor idle_urbs; /* URBs waiting to be submitted */
54 struct usb_anchor rx_urbs; /* URBs waiting for reception */
57 struct usb_ctrlrequest tx_dr;
59 struct sk_buff *tx_skb;
60 uint8_t tx_ack_seq; /* current TX ACK sequence number */
63 /* ----- USB commands without data ----------------------------------------- */
65 /* To reduce the number of error checks in the code, we record the first error
66 * in atusb->err and reject all subsequent requests until the error is cleared.
69 static int atusb_control_msg(struct atusb *atusb, unsigned int pipe,
70 __u8 request, __u8 requesttype,
71 __u16 value, __u16 index,
72 void *data, __u16 size, int timeout)
74 struct usb_device *usb_dev = atusb->usb_dev;
80 ret = usb_control_msg(usb_dev, pipe, request, requesttype,
81 value, index, data, size, timeout);
83 ret = ret < 0 ? ret : -ENODATA;
86 dev_err(&usb_dev->dev,
87 "atusb_control_msg: req 0x%02x val 0x%x idx 0x%x, error %d\n",
88 request, value, index, ret);
93 static int atusb_command(struct atusb *atusb, uint8_t cmd, uint8_t arg)
95 struct usb_device *usb_dev = atusb->usb_dev;
97 dev_dbg(&usb_dev->dev, "atusb_command: cmd = 0x%x\n", cmd);
98 return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0),
99 cmd, ATUSB_REQ_TO_DEV, arg, 0, NULL, 0, 1000);
102 static int atusb_write_reg(struct atusb *atusb, uint8_t reg, uint8_t value)
104 struct usb_device *usb_dev = atusb->usb_dev;
106 dev_dbg(&usb_dev->dev, "atusb_write_reg: 0x%02x <- 0x%02x\n",
108 return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0),
109 ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
110 value, reg, NULL, 0, 1000);
113 static int atusb_read_reg(struct atusb *atusb, uint8_t reg)
115 struct usb_device *usb_dev = atusb->usb_dev;
120 buffer = kmalloc(1, GFP_KERNEL);
124 dev_dbg(&usb_dev->dev, "atusb: reg = 0x%x\n", reg);
125 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
126 ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
127 0, reg, buffer, 1, 1000);
139 static int atusb_write_subreg(struct atusb *atusb, uint8_t reg, uint8_t mask,
140 uint8_t shift, uint8_t value)
142 struct usb_device *usb_dev = atusb->usb_dev;
146 dev_dbg(&usb_dev->dev, "atusb_write_subreg: 0x%02x <- 0x%02x\n",
149 orig = atusb_read_reg(atusb, reg);
151 /* Write the value only into that part of the register which is allowed
152 * by the mask. All other bits stay as before.
155 tmp |= (value << shift) & mask;
158 ret = atusb_write_reg(atusb, reg, tmp);
163 static int atusb_get_and_clear_error(struct atusb *atusb)
165 int err = atusb->err;
171 /* ----- skb allocation ---------------------------------------------------- */
174 #define MAX_RX_XFER (1 + MAX_PSDU + 2 + 1) /* PHR+PSDU+CRC+LQI */
176 #define SKB_ATUSB(skb) (*(struct atusb **)(skb)->cb)
178 static void atusb_in(struct urb *urb);
180 static int atusb_submit_rx_urb(struct atusb *atusb, struct urb *urb)
182 struct usb_device *usb_dev = atusb->usb_dev;
183 struct sk_buff *skb = urb->context;
187 skb = alloc_skb(MAX_RX_XFER, GFP_KERNEL);
189 dev_warn_ratelimited(&usb_dev->dev,
190 "atusb_in: can't allocate skb\n");
193 skb_put(skb, MAX_RX_XFER);
194 SKB_ATUSB(skb) = atusb;
197 usb_fill_bulk_urb(urb, usb_dev, usb_rcvbulkpipe(usb_dev, 1),
198 skb->data, MAX_RX_XFER, atusb_in, skb);
199 usb_anchor_urb(urb, &atusb->rx_urbs);
201 ret = usb_submit_urb(urb, GFP_KERNEL);
203 usb_unanchor_urb(urb);
210 static void atusb_work_urbs(struct work_struct *work)
212 struct atusb *atusb =
213 container_of(to_delayed_work(work), struct atusb, work);
214 struct usb_device *usb_dev = atusb->usb_dev;
222 urb = usb_get_from_anchor(&atusb->idle_urbs);
225 ret = atusb_submit_rx_urb(atusb, urb);
228 usb_anchor_urb(urb, &atusb->idle_urbs);
229 dev_warn_ratelimited(&usb_dev->dev,
230 "atusb_in: can't allocate/submit URB (%d)\n", ret);
231 schedule_delayed_work(&atusb->work,
232 msecs_to_jiffies(ATUSB_ALLOC_DELAY_MS) + 1);
235 /* ----- Asynchronous USB -------------------------------------------------- */
237 static void atusb_tx_done(struct atusb *atusb, uint8_t seq)
239 struct usb_device *usb_dev = atusb->usb_dev;
240 uint8_t expect = atusb->tx_ack_seq;
242 dev_dbg(&usb_dev->dev, "atusb_tx_done (0x%02x/0x%02x)\n", seq, expect);
244 /* TODO check for ifs handling in firmware */
245 ieee802154_xmit_complete(atusb->hw, atusb->tx_skb, false);
247 /* TODO I experience this case when atusb has a tx complete
248 * irq before probing, we should fix the firmware it's an
249 * unlikely case now that seq == expect is then true, but can
250 * happen and fail with a tx_skb = NULL;
252 ieee802154_wake_queue(atusb->hw);
254 dev_kfree_skb_irq(atusb->tx_skb);
258 static void atusb_in_good(struct urb *urb)
260 struct usb_device *usb_dev = urb->dev;
261 struct sk_buff *skb = urb->context;
262 struct atusb *atusb = SKB_ATUSB(skb);
265 if (!urb->actual_length) {
266 dev_dbg(&usb_dev->dev, "atusb_in: zero-sized URB ?\n");
272 if (urb->actual_length == 1) {
273 atusb_tx_done(atusb, len);
277 if (len + 1 > urb->actual_length - 1) {
278 dev_dbg(&usb_dev->dev, "atusb_in: frame len %d+1 > URB %u-1\n",
279 len, urb->actual_length);
283 if (!ieee802154_is_valid_psdu_len(len)) {
284 dev_dbg(&usb_dev->dev, "atusb_in: frame corrupted\n");
288 lqi = skb->data[len + 1];
289 dev_dbg(&usb_dev->dev, "atusb_in: rx len %d lqi 0x%02x\n", len, lqi);
290 skb_pull(skb, 1); /* remove PHR */
291 skb_trim(skb, len); /* get payload only */
292 ieee802154_rx_irqsafe(atusb->hw, skb, lqi);
293 urb->context = NULL; /* skb is gone */
296 static void atusb_in(struct urb *urb)
298 struct usb_device *usb_dev = urb->dev;
299 struct sk_buff *skb = urb->context;
300 struct atusb *atusb = SKB_ATUSB(skb);
302 dev_dbg(&usb_dev->dev, "atusb_in: status %d len %d\n",
303 urb->status, urb->actual_length);
305 if (urb->status == -ENOENT) { /* being killed */
310 dev_dbg(&usb_dev->dev, "atusb_in: URB error %d\n", urb->status);
315 usb_anchor_urb(urb, &atusb->idle_urbs);
316 if (!atusb->shutdown)
317 schedule_delayed_work(&atusb->work, 0);
320 /* ----- URB allocation/deallocation --------------------------------------- */
322 static void atusb_free_urbs(struct atusb *atusb)
327 urb = usb_get_from_anchor(&atusb->idle_urbs);
330 kfree_skb(urb->context);
335 static int atusb_alloc_urbs(struct atusb *atusb, int n)
340 urb = usb_alloc_urb(0, GFP_KERNEL);
342 atusb_free_urbs(atusb);
345 usb_anchor_urb(urb, &atusb->idle_urbs);
352 /* ----- IEEE 802.15.4 interface operations -------------------------------- */
354 static void atusb_xmit_complete(struct urb *urb)
356 dev_dbg(&urb->dev->dev, "atusb_xmit urb completed");
359 static int atusb_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
361 struct atusb *atusb = hw->priv;
362 struct usb_device *usb_dev = atusb->usb_dev;
365 dev_dbg(&usb_dev->dev, "atusb_xmit (%d)\n", skb->len);
368 atusb->tx_dr.wIndex = cpu_to_le16(atusb->tx_ack_seq);
369 atusb->tx_dr.wLength = cpu_to_le16(skb->len);
371 usb_fill_control_urb(atusb->tx_urb, usb_dev,
372 usb_sndctrlpipe(usb_dev, 0),
373 (unsigned char *)&atusb->tx_dr, skb->data,
374 skb->len, atusb_xmit_complete, NULL);
375 ret = usb_submit_urb(atusb->tx_urb, GFP_ATOMIC);
376 dev_dbg(&usb_dev->dev, "atusb_xmit done (%d)\n", ret);
380 static int atusb_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
382 struct atusb *atusb = hw->priv;
385 ret = atusb_write_subreg(atusb, SR_CHANNEL, channel);
388 msleep(1); /* @@@ ugly synchronization */
392 static int atusb_ed(struct ieee802154_hw *hw, u8 *level)
399 static int atusb_set_hw_addr_filt(struct ieee802154_hw *hw,
400 struct ieee802154_hw_addr_filt *filt,
401 unsigned long changed)
403 struct atusb *atusb = hw->priv;
404 struct device *dev = &atusb->usb_dev->dev;
406 if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
407 u16 addr = le16_to_cpu(filt->short_addr);
409 dev_vdbg(dev, "atusb_set_hw_addr_filt called for saddr\n");
410 atusb_write_reg(atusb, RG_SHORT_ADDR_0, addr);
411 atusb_write_reg(atusb, RG_SHORT_ADDR_1, addr >> 8);
414 if (changed & IEEE802154_AFILT_PANID_CHANGED) {
415 u16 pan = le16_to_cpu(filt->pan_id);
417 dev_vdbg(dev, "atusb_set_hw_addr_filt called for pan id\n");
418 atusb_write_reg(atusb, RG_PAN_ID_0, pan);
419 atusb_write_reg(atusb, RG_PAN_ID_1, pan >> 8);
422 if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
423 u8 i, addr[IEEE802154_EXTENDED_ADDR_LEN];
425 memcpy(addr, &filt->ieee_addr, IEEE802154_EXTENDED_ADDR_LEN);
426 dev_vdbg(dev, "atusb_set_hw_addr_filt called for IEEE addr\n");
427 for (i = 0; i < 8; i++)
428 atusb_write_reg(atusb, RG_IEEE_ADDR_0 + i, addr[i]);
431 if (changed & IEEE802154_AFILT_PANC_CHANGED) {
433 "atusb_set_hw_addr_filt called for panc change\n");
435 atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 1);
437 atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 0);
440 return atusb_get_and_clear_error(atusb);
443 static int atusb_start(struct ieee802154_hw *hw)
445 struct atusb *atusb = hw->priv;
446 struct usb_device *usb_dev = atusb->usb_dev;
449 dev_dbg(&usb_dev->dev, "atusb_start\n");
450 schedule_delayed_work(&atusb->work, 0);
451 atusb_command(atusb, ATUSB_RX_MODE, 1);
452 ret = atusb_get_and_clear_error(atusb);
454 usb_kill_anchored_urbs(&atusb->idle_urbs);
458 static void atusb_stop(struct ieee802154_hw *hw)
460 struct atusb *atusb = hw->priv;
461 struct usb_device *usb_dev = atusb->usb_dev;
463 dev_dbg(&usb_dev->dev, "atusb_stop\n");
464 usb_kill_anchored_urbs(&atusb->idle_urbs);
465 atusb_command(atusb, ATUSB_RX_MODE, 0);
466 atusb_get_and_clear_error(atusb);
469 #define ATUSB_MAX_TX_POWERS 0xF
470 static const s32 atusb_powers[ATUSB_MAX_TX_POWERS + 1] = {
471 300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700,
476 atusb_set_txpower(struct ieee802154_hw *hw, s32 mbm)
478 struct atusb *atusb = hw->priv;
481 for (i = 0; i < hw->phy->supported.tx_powers_size; i++) {
482 if (hw->phy->supported.tx_powers[i] == mbm)
483 return atusb_write_subreg(atusb, SR_TX_PWR_23X, i);
489 #define ATUSB_MAX_ED_LEVELS 0xF
490 static const s32 atusb_ed_levels[ATUSB_MAX_ED_LEVELS + 1] = {
491 -9100, -8900, -8700, -8500, -8300, -8100, -7900, -7700, -7500, -7300,
492 -7100, -6900, -6700, -6500, -6300, -6100,
496 atusb_set_cca_mode(struct ieee802154_hw *hw, const struct wpan_phy_cca *cca)
498 struct atusb *atusb = hw->priv;
501 /* mapping 802.15.4 to driver spec */
503 case NL802154_CCA_ENERGY:
506 case NL802154_CCA_CARRIER:
509 case NL802154_CCA_ENERGY_CARRIER:
511 case NL802154_CCA_OPT_ENERGY_CARRIER_AND:
514 case NL802154_CCA_OPT_ENERGY_CARRIER_OR:
525 return atusb_write_subreg(atusb, SR_CCA_MODE, val);
529 atusb_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
531 struct atusb *atusb = hw->priv;
534 for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) {
535 if (hw->phy->supported.cca_ed_levels[i] == mbm)
536 return atusb_write_subreg(atusb, SR_CCA_ED_THRES, i);
543 atusb_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be, u8 retries)
545 struct atusb *atusb = hw->priv;
548 ret = atusb_write_subreg(atusb, SR_MIN_BE, min_be);
552 ret = atusb_write_subreg(atusb, SR_MAX_BE, max_be);
556 return atusb_write_subreg(atusb, SR_MAX_CSMA_RETRIES, retries);
560 atusb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
562 struct atusb *atusb = hw->priv;
566 ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 1);
570 ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 1);
574 ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 0);
578 ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 0);
586 static struct ieee802154_ops atusb_ops = {
587 .owner = THIS_MODULE,
588 .xmit_async = atusb_xmit,
590 .set_channel = atusb_channel,
591 .start = atusb_start,
593 .set_hw_addr_filt = atusb_set_hw_addr_filt,
594 .set_txpower = atusb_set_txpower,
595 .set_cca_mode = atusb_set_cca_mode,
596 .set_cca_ed_level = atusb_set_cca_ed_level,
597 .set_csma_params = atusb_set_csma_params,
598 .set_promiscuous_mode = atusb_set_promiscuous_mode,
601 /* ----- Firmware and chip version information ----------------------------- */
603 static int atusb_get_and_show_revision(struct atusb *atusb)
605 struct usb_device *usb_dev = atusb->usb_dev;
606 unsigned char *buffer;
609 buffer = kmalloc(3, GFP_KERNEL);
613 /* Get a couple of the ATMega Firmware values */
614 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
615 ATUSB_ID, ATUSB_REQ_FROM_DEV, 0, 0,
618 dev_info(&usb_dev->dev,
619 "Firmware: major: %u, minor: %u, hardware type: %u\n",
620 buffer[0], buffer[1], buffer[2]);
621 if (buffer[0] == 0 && buffer[1] < 2) {
622 dev_info(&usb_dev->dev,
623 "Firmware version (%u.%u) is predates our first public release.",
624 buffer[0], buffer[1]);
625 dev_info(&usb_dev->dev, "Please update to version 0.2 or newer");
632 static int atusb_get_and_show_build(struct atusb *atusb)
634 struct usb_device *usb_dev = atusb->usb_dev;
638 build = kmalloc(ATUSB_BUILD_SIZE + 1, GFP_KERNEL);
642 /* We cannot call atusb_control_msg() here, since this request may read various length data */
643 ret = usb_control_msg(atusb->usb_dev, usb_rcvctrlpipe(usb_dev, 0), ATUSB_BUILD,
644 ATUSB_REQ_FROM_DEV, 0, 0, build, ATUSB_BUILD_SIZE, 1000);
647 dev_info(&usb_dev->dev, "Firmware: build %s\n", build);
654 static int atusb_get_and_show_chip(struct atusb *atusb)
656 struct usb_device *usb_dev = atusb->usb_dev;
657 uint8_t man_id_0, man_id_1, part_num, version_num;
660 man_id_0 = atusb_read_reg(atusb, RG_MAN_ID_0);
661 man_id_1 = atusb_read_reg(atusb, RG_MAN_ID_1);
662 part_num = atusb_read_reg(atusb, RG_PART_NUM);
663 version_num = atusb_read_reg(atusb, RG_VERSION_NUM);
668 if ((man_id_1 << 8 | man_id_0) != ATUSB_JEDEC_ATMEL) {
669 dev_err(&usb_dev->dev,
670 "non-Atmel transceiver xxxx%02x%02x\n",
683 dev_err(&usb_dev->dev,
684 "unexpected transceiver, part 0x%02x version 0x%02x\n",
685 part_num, version_num);
689 dev_info(&usb_dev->dev, "ATUSB: %s version %d\n", chip, version_num);
694 atusb->err = -ENODEV;
698 /* ----- Setup ------------------------------------------------------------- */
700 static int atusb_probe(struct usb_interface *interface,
701 const struct usb_device_id *id)
703 struct usb_device *usb_dev = interface_to_usbdev(interface);
704 struct ieee802154_hw *hw;
705 struct atusb *atusb = NULL;
708 hw = ieee802154_alloc_hw(sizeof(struct atusb), &atusb_ops);
714 atusb->usb_dev = usb_get_dev(usb_dev);
715 usb_set_intfdata(interface, atusb);
719 INIT_DELAYED_WORK(&atusb->work, atusb_work_urbs);
720 init_usb_anchor(&atusb->idle_urbs);
721 init_usb_anchor(&atusb->rx_urbs);
723 if (atusb_alloc_urbs(atusb, ATUSB_NUM_RX_URBS))
726 atusb->tx_dr.bRequestType = ATUSB_REQ_TO_DEV;
727 atusb->tx_dr.bRequest = ATUSB_TX;
728 atusb->tx_dr.wValue = cpu_to_le16(0);
730 atusb->tx_urb = usb_alloc_urb(0, GFP_ATOMIC);
734 hw->parent = &usb_dev->dev;
735 hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT |
736 IEEE802154_HW_PROMISCUOUS | IEEE802154_HW_CSMA_PARAMS;
738 hw->phy->flags = WPAN_PHY_FLAG_TXPOWER | WPAN_PHY_FLAG_CCA_ED_LEVEL |
739 WPAN_PHY_FLAG_CCA_MODE;
741 hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) |
742 BIT(NL802154_CCA_CARRIER) | BIT(NL802154_CCA_ENERGY_CARRIER);
743 hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |
744 BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);
746 hw->phy->supported.cca_ed_levels = atusb_ed_levels;
747 hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(atusb_ed_levels);
749 hw->phy->cca.mode = NL802154_CCA_ENERGY;
751 hw->phy->current_page = 0;
752 hw->phy->current_channel = 11; /* reset default */
753 hw->phy->supported.channels[0] = 0x7FFF800;
754 hw->phy->supported.tx_powers = atusb_powers;
755 hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers);
756 hw->phy->transmit_power = hw->phy->supported.tx_powers[0];
757 ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
758 hw->phy->cca_ed_level = hw->phy->supported.cca_ed_levels[7];
760 atusb_command(atusb, ATUSB_RF_RESET, 0);
761 atusb_get_and_show_chip(atusb);
762 atusb_get_and_show_revision(atusb);
763 atusb_get_and_show_build(atusb);
764 ret = atusb_get_and_clear_error(atusb);
766 dev_err(&atusb->usb_dev->dev,
767 "%s: initialization failed, error = %d\n",
772 ret = ieee802154_register_hw(hw);
776 /* If we just powered on, we're now in P_ON and need to enter TRX_OFF
777 * explicitly. Any resets after that will send us straight to TRX_OFF,
778 * making the command below redundant.
780 atusb_write_reg(atusb, RG_TRX_STATE, STATE_FORCE_TRX_OFF);
781 msleep(1); /* reset => TRX_OFF, tTR13 = 37 us */
784 /* Calculating the maximum time available to empty the frame buffer
787 * According to [1], the inter-frame gap is
788 * R * 20 * 16 us + 128 us
789 * where R is a random number from 0 to 7. Furthermore, we have 20 bit
790 * times (80 us at 250 kbps) of SHR of the next frame before the
791 * transceiver begins storing data in the frame buffer.
793 * This yields a minimum time of 208 us between the last data of a
794 * frame and the first data of the next frame. This time is further
795 * reduced by interrupt latency in the atusb firmware.
797 * atusb currently needs about 500 us to retrieve a maximum-sized
798 * frame. We therefore have to allow reception of a new frame to begin
799 * while we retrieve the previous frame.
801 * [1] "JN-AN-1035 Calculating data rates in an IEEE 802.15.4-based
802 * network", Jennic 2006.
803 * http://www.jennic.com/download_file.php?supportFile=JN-AN-1035%20Calculating%20802-15-4%20Data%20Rates-1v0.pdf
806 atusb_write_subreg(atusb, SR_RX_SAFE_MODE, 1);
808 atusb_write_reg(atusb, RG_IRQ_MASK, 0xff);
810 ret = atusb_get_and_clear_error(atusb);
814 dev_err(&atusb->usb_dev->dev,
815 "%s: setup failed, error = %d\n",
818 ieee802154_unregister_hw(hw);
820 atusb_free_urbs(atusb);
821 usb_kill_urb(atusb->tx_urb);
822 usb_free_urb(atusb->tx_urb);
823 usb_put_dev(usb_dev);
824 ieee802154_free_hw(hw);
828 static void atusb_disconnect(struct usb_interface *interface)
830 struct atusb *atusb = usb_get_intfdata(interface);
832 dev_dbg(&atusb->usb_dev->dev, "atusb_disconnect\n");
835 cancel_delayed_work_sync(&atusb->work);
837 usb_kill_anchored_urbs(&atusb->rx_urbs);
838 atusb_free_urbs(atusb);
839 usb_kill_urb(atusb->tx_urb);
840 usb_free_urb(atusb->tx_urb);
842 ieee802154_unregister_hw(atusb->hw);
844 usb_put_dev(atusb->usb_dev);
846 ieee802154_free_hw(atusb->hw);
848 usb_set_intfdata(interface, NULL);
850 pr_debug("atusb_disconnect done\n");
853 /* The devices we work with */
854 static const struct usb_device_id atusb_device_table[] = {
856 .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
857 USB_DEVICE_ID_MATCH_INT_INFO,
858 .idVendor = ATUSB_VENDOR_ID,
859 .idProduct = ATUSB_PRODUCT_ID,
860 .bInterfaceClass = USB_CLASS_VENDOR_SPEC
862 /* end with null element */
865 MODULE_DEVICE_TABLE(usb, atusb_device_table);
867 static struct usb_driver atusb_driver = {
869 .probe = atusb_probe,
870 .disconnect = atusb_disconnect,
871 .id_table = atusb_device_table,
873 module_usb_driver(atusb_driver);
875 MODULE_AUTHOR("Alexander Aring <alex.aring@gmail.com>");
876 MODULE_AUTHOR("Richard Sharpe <realrichardsharpe@gmail.com>");
877 MODULE_AUTHOR("Stefan Schmidt <stefan@datenfreihafen.org>");
878 MODULE_AUTHOR("Werner Almesberger <werner@almesberger.net>");
879 MODULE_DESCRIPTION("ATUSB IEEE 802.15.4 Driver");
880 MODULE_LICENSE("GPL");