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 */
62 /* Firmware variable */
63 unsigned char fw_ver_maj; /* Firmware major version number */
64 unsigned char fw_ver_min; /* Firmware minor version number */
65 unsigned char fw_hw_type; /* Firmware hardware type */
68 /* ----- USB commands without data ----------------------------------------- */
70 /* To reduce the number of error checks in the code, we record the first error
71 * in atusb->err and reject all subsequent requests until the error is cleared.
74 static int atusb_control_msg(struct atusb *atusb, unsigned int pipe,
75 __u8 request, __u8 requesttype,
76 __u16 value, __u16 index,
77 void *data, __u16 size, int timeout)
79 struct usb_device *usb_dev = atusb->usb_dev;
85 ret = usb_control_msg(usb_dev, pipe, request, requesttype,
86 value, index, data, size, timeout);
88 ret = ret < 0 ? ret : -ENODATA;
91 dev_err(&usb_dev->dev,
92 "atusb_control_msg: req 0x%02x val 0x%x idx 0x%x, error %d\n",
93 request, value, index, ret);
98 static int atusb_command(struct atusb *atusb, uint8_t cmd, uint8_t arg)
100 struct usb_device *usb_dev = atusb->usb_dev;
102 dev_dbg(&usb_dev->dev, "atusb_command: cmd = 0x%x\n", cmd);
103 return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0),
104 cmd, ATUSB_REQ_TO_DEV, arg, 0, NULL, 0, 1000);
107 static int atusb_write_reg(struct atusb *atusb, uint8_t reg, uint8_t value)
109 struct usb_device *usb_dev = atusb->usb_dev;
111 dev_dbg(&usb_dev->dev, "atusb_write_reg: 0x%02x <- 0x%02x\n",
113 return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0),
114 ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
115 value, reg, NULL, 0, 1000);
118 static int atusb_read_reg(struct atusb *atusb, uint8_t reg)
120 struct usb_device *usb_dev = atusb->usb_dev;
125 buffer = kmalloc(1, GFP_KERNEL);
129 dev_dbg(&usb_dev->dev, "atusb: reg = 0x%x\n", reg);
130 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
131 ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
132 0, reg, buffer, 1, 1000);
144 static int atusb_write_subreg(struct atusb *atusb, uint8_t reg, uint8_t mask,
145 uint8_t shift, uint8_t value)
147 struct usb_device *usb_dev = atusb->usb_dev;
151 dev_dbg(&usb_dev->dev, "atusb_write_subreg: 0x%02x <- 0x%02x\n",
154 orig = atusb_read_reg(atusb, reg);
156 /* Write the value only into that part of the register which is allowed
157 * by the mask. All other bits stay as before.
160 tmp |= (value << shift) & mask;
163 ret = atusb_write_reg(atusb, reg, tmp);
168 static int atusb_get_and_clear_error(struct atusb *atusb)
170 int err = atusb->err;
176 /* ----- skb allocation ---------------------------------------------------- */
179 #define MAX_RX_XFER (1 + MAX_PSDU + 2 + 1) /* PHR+PSDU+CRC+LQI */
181 #define SKB_ATUSB(skb) (*(struct atusb **)(skb)->cb)
183 static void atusb_in(struct urb *urb);
185 static int atusb_submit_rx_urb(struct atusb *atusb, struct urb *urb)
187 struct usb_device *usb_dev = atusb->usb_dev;
188 struct sk_buff *skb = urb->context;
192 skb = alloc_skb(MAX_RX_XFER, GFP_KERNEL);
194 dev_warn_ratelimited(&usb_dev->dev,
195 "atusb_in: can't allocate skb\n");
198 skb_put(skb, MAX_RX_XFER);
199 SKB_ATUSB(skb) = atusb;
202 usb_fill_bulk_urb(urb, usb_dev, usb_rcvbulkpipe(usb_dev, 1),
203 skb->data, MAX_RX_XFER, atusb_in, skb);
204 usb_anchor_urb(urb, &atusb->rx_urbs);
206 ret = usb_submit_urb(urb, GFP_KERNEL);
208 usb_unanchor_urb(urb);
215 static void atusb_work_urbs(struct work_struct *work)
217 struct atusb *atusb =
218 container_of(to_delayed_work(work), struct atusb, work);
219 struct usb_device *usb_dev = atusb->usb_dev;
227 urb = usb_get_from_anchor(&atusb->idle_urbs);
230 ret = atusb_submit_rx_urb(atusb, urb);
233 usb_anchor_urb(urb, &atusb->idle_urbs);
234 dev_warn_ratelimited(&usb_dev->dev,
235 "atusb_in: can't allocate/submit URB (%d)\n", ret);
236 schedule_delayed_work(&atusb->work,
237 msecs_to_jiffies(ATUSB_ALLOC_DELAY_MS) + 1);
240 /* ----- Asynchronous USB -------------------------------------------------- */
242 static void atusb_tx_done(struct atusb *atusb, uint8_t seq)
244 struct usb_device *usb_dev = atusb->usb_dev;
245 uint8_t expect = atusb->tx_ack_seq;
247 dev_dbg(&usb_dev->dev, "atusb_tx_done (0x%02x/0x%02x)\n", seq, expect);
249 /* TODO check for ifs handling in firmware */
250 ieee802154_xmit_complete(atusb->hw, atusb->tx_skb, false);
252 /* TODO I experience this case when atusb has a tx complete
253 * irq before probing, we should fix the firmware it's an
254 * unlikely case now that seq == expect is then true, but can
255 * happen and fail with a tx_skb = NULL;
257 ieee802154_wake_queue(atusb->hw);
259 dev_kfree_skb_irq(atusb->tx_skb);
263 static void atusb_in_good(struct urb *urb)
265 struct usb_device *usb_dev = urb->dev;
266 struct sk_buff *skb = urb->context;
267 struct atusb *atusb = SKB_ATUSB(skb);
270 if (!urb->actual_length) {
271 dev_dbg(&usb_dev->dev, "atusb_in: zero-sized URB ?\n");
277 if (urb->actual_length == 1) {
278 atusb_tx_done(atusb, len);
282 if (len + 1 > urb->actual_length - 1) {
283 dev_dbg(&usb_dev->dev, "atusb_in: frame len %d+1 > URB %u-1\n",
284 len, urb->actual_length);
288 if (!ieee802154_is_valid_psdu_len(len)) {
289 dev_dbg(&usb_dev->dev, "atusb_in: frame corrupted\n");
293 lqi = skb->data[len + 1];
294 dev_dbg(&usb_dev->dev, "atusb_in: rx len %d lqi 0x%02x\n", len, lqi);
295 skb_pull(skb, 1); /* remove PHR */
296 skb_trim(skb, len); /* get payload only */
297 ieee802154_rx_irqsafe(atusb->hw, skb, lqi);
298 urb->context = NULL; /* skb is gone */
301 static void atusb_in(struct urb *urb)
303 struct usb_device *usb_dev = urb->dev;
304 struct sk_buff *skb = urb->context;
305 struct atusb *atusb = SKB_ATUSB(skb);
307 dev_dbg(&usb_dev->dev, "atusb_in: status %d len %d\n",
308 urb->status, urb->actual_length);
310 if (urb->status == -ENOENT) { /* being killed */
315 dev_dbg(&usb_dev->dev, "atusb_in: URB error %d\n", urb->status);
320 usb_anchor_urb(urb, &atusb->idle_urbs);
321 if (!atusb->shutdown)
322 schedule_delayed_work(&atusb->work, 0);
325 /* ----- URB allocation/deallocation --------------------------------------- */
327 static void atusb_free_urbs(struct atusb *atusb)
332 urb = usb_get_from_anchor(&atusb->idle_urbs);
335 kfree_skb(urb->context);
340 static int atusb_alloc_urbs(struct atusb *atusb, int n)
345 urb = usb_alloc_urb(0, GFP_KERNEL);
347 atusb_free_urbs(atusb);
350 usb_anchor_urb(urb, &atusb->idle_urbs);
357 /* ----- IEEE 802.15.4 interface operations -------------------------------- */
359 static void atusb_xmit_complete(struct urb *urb)
361 dev_dbg(&urb->dev->dev, "atusb_xmit urb completed");
364 static int atusb_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
366 struct atusb *atusb = hw->priv;
367 struct usb_device *usb_dev = atusb->usb_dev;
370 dev_dbg(&usb_dev->dev, "atusb_xmit (%d)\n", skb->len);
373 atusb->tx_dr.wIndex = cpu_to_le16(atusb->tx_ack_seq);
374 atusb->tx_dr.wLength = cpu_to_le16(skb->len);
376 usb_fill_control_urb(atusb->tx_urb, usb_dev,
377 usb_sndctrlpipe(usb_dev, 0),
378 (unsigned char *)&atusb->tx_dr, skb->data,
379 skb->len, atusb_xmit_complete, NULL);
380 ret = usb_submit_urb(atusb->tx_urb, GFP_ATOMIC);
381 dev_dbg(&usb_dev->dev, "atusb_xmit done (%d)\n", ret);
385 static int atusb_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
387 struct atusb *atusb = hw->priv;
390 ret = atusb_write_subreg(atusb, SR_CHANNEL, channel);
393 msleep(1); /* @@@ ugly synchronization */
397 static int atusb_ed(struct ieee802154_hw *hw, u8 *level)
404 static int atusb_set_hw_addr_filt(struct ieee802154_hw *hw,
405 struct ieee802154_hw_addr_filt *filt,
406 unsigned long changed)
408 struct atusb *atusb = hw->priv;
409 struct device *dev = &atusb->usb_dev->dev;
411 if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
412 u16 addr = le16_to_cpu(filt->short_addr);
414 dev_vdbg(dev, "atusb_set_hw_addr_filt called for saddr\n");
415 atusb_write_reg(atusb, RG_SHORT_ADDR_0, addr);
416 atusb_write_reg(atusb, RG_SHORT_ADDR_1, addr >> 8);
419 if (changed & IEEE802154_AFILT_PANID_CHANGED) {
420 u16 pan = le16_to_cpu(filt->pan_id);
422 dev_vdbg(dev, "atusb_set_hw_addr_filt called for pan id\n");
423 atusb_write_reg(atusb, RG_PAN_ID_0, pan);
424 atusb_write_reg(atusb, RG_PAN_ID_1, pan >> 8);
427 if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
428 u8 i, addr[IEEE802154_EXTENDED_ADDR_LEN];
430 memcpy(addr, &filt->ieee_addr, IEEE802154_EXTENDED_ADDR_LEN);
431 dev_vdbg(dev, "atusb_set_hw_addr_filt called for IEEE addr\n");
432 for (i = 0; i < 8; i++)
433 atusb_write_reg(atusb, RG_IEEE_ADDR_0 + i, addr[i]);
436 if (changed & IEEE802154_AFILT_PANC_CHANGED) {
438 "atusb_set_hw_addr_filt called for panc change\n");
440 atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 1);
442 atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 0);
445 return atusb_get_and_clear_error(atusb);
448 static int atusb_start(struct ieee802154_hw *hw)
450 struct atusb *atusb = hw->priv;
451 struct usb_device *usb_dev = atusb->usb_dev;
454 dev_dbg(&usb_dev->dev, "atusb_start\n");
455 schedule_delayed_work(&atusb->work, 0);
456 atusb_command(atusb, ATUSB_RX_MODE, 1);
457 ret = atusb_get_and_clear_error(atusb);
459 usb_kill_anchored_urbs(&atusb->idle_urbs);
463 static void atusb_stop(struct ieee802154_hw *hw)
465 struct atusb *atusb = hw->priv;
466 struct usb_device *usb_dev = atusb->usb_dev;
468 dev_dbg(&usb_dev->dev, "atusb_stop\n");
469 usb_kill_anchored_urbs(&atusb->idle_urbs);
470 atusb_command(atusb, ATUSB_RX_MODE, 0);
471 atusb_get_and_clear_error(atusb);
474 #define ATUSB_MAX_TX_POWERS 0xF
475 static const s32 atusb_powers[ATUSB_MAX_TX_POWERS + 1] = {
476 300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700,
481 atusb_set_txpower(struct ieee802154_hw *hw, s32 mbm)
483 struct atusb *atusb = hw->priv;
486 for (i = 0; i < hw->phy->supported.tx_powers_size; i++) {
487 if (hw->phy->supported.tx_powers[i] == mbm)
488 return atusb_write_subreg(atusb, SR_TX_PWR_23X, i);
494 #define ATUSB_MAX_ED_LEVELS 0xF
495 static const s32 atusb_ed_levels[ATUSB_MAX_ED_LEVELS + 1] = {
496 -9100, -8900, -8700, -8500, -8300, -8100, -7900, -7700, -7500, -7300,
497 -7100, -6900, -6700, -6500, -6300, -6100,
501 atusb_set_cca_mode(struct ieee802154_hw *hw, const struct wpan_phy_cca *cca)
503 struct atusb *atusb = hw->priv;
506 /* mapping 802.15.4 to driver spec */
508 case NL802154_CCA_ENERGY:
511 case NL802154_CCA_CARRIER:
514 case NL802154_CCA_ENERGY_CARRIER:
516 case NL802154_CCA_OPT_ENERGY_CARRIER_AND:
519 case NL802154_CCA_OPT_ENERGY_CARRIER_OR:
530 return atusb_write_subreg(atusb, SR_CCA_MODE, val);
534 atusb_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
536 struct atusb *atusb = hw->priv;
539 for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) {
540 if (hw->phy->supported.cca_ed_levels[i] == mbm)
541 return atusb_write_subreg(atusb, SR_CCA_ED_THRES, i);
548 atusb_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be, u8 retries)
550 struct atusb *atusb = hw->priv;
553 ret = atusb_write_subreg(atusb, SR_MIN_BE, min_be);
557 ret = atusb_write_subreg(atusb, SR_MAX_BE, max_be);
561 return atusb_write_subreg(atusb, SR_MAX_CSMA_RETRIES, retries);
565 atusb_set_frame_retries(struct ieee802154_hw *hw, s8 retries)
567 struct atusb *atusb = hw->priv;
569 return atusb_write_subreg(atusb, SR_MAX_FRAME_RETRIES, retries);
573 atusb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
575 struct atusb *atusb = hw->priv;
579 ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 1);
583 ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 1);
587 ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 0);
591 ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 0);
599 static const struct ieee802154_ops atusb_ops = {
600 .owner = THIS_MODULE,
601 .xmit_async = atusb_xmit,
603 .set_channel = atusb_channel,
604 .start = atusb_start,
606 .set_hw_addr_filt = atusb_set_hw_addr_filt,
607 .set_txpower = atusb_set_txpower,
608 .set_cca_mode = atusb_set_cca_mode,
609 .set_cca_ed_level = atusb_set_cca_ed_level,
610 .set_csma_params = atusb_set_csma_params,
611 .set_frame_retries = atusb_set_frame_retries,
612 .set_promiscuous_mode = atusb_set_promiscuous_mode,
615 /* ----- Firmware and chip version information ----------------------------- */
617 static int atusb_get_and_show_revision(struct atusb *atusb)
619 struct usb_device *usb_dev = atusb->usb_dev;
620 unsigned char *buffer;
623 buffer = kmalloc(3, GFP_KERNEL);
627 /* Get a couple of the ATMega Firmware values */
628 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
629 ATUSB_ID, ATUSB_REQ_FROM_DEV, 0, 0,
632 atusb->fw_ver_maj = buffer[0];
633 atusb->fw_ver_min = buffer[1];
634 atusb->fw_hw_type = buffer[2];
636 dev_info(&usb_dev->dev,
637 "Firmware: major: %u, minor: %u, hardware type: %u\n",
638 atusb->fw_ver_maj, atusb->fw_ver_min, atusb->fw_hw_type);
640 if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 2) {
641 dev_info(&usb_dev->dev,
642 "Firmware version (%u.%u) predates our first public release.",
643 atusb->fw_ver_maj, atusb->fw_ver_min);
644 dev_info(&usb_dev->dev, "Please update to version 0.2 or newer");
651 static int atusb_get_and_show_build(struct atusb *atusb)
653 struct usb_device *usb_dev = atusb->usb_dev;
657 build = kmalloc(ATUSB_BUILD_SIZE + 1, GFP_KERNEL);
661 /* We cannot call atusb_control_msg() here, since this request may read various length data */
662 ret = usb_control_msg(atusb->usb_dev, usb_rcvctrlpipe(usb_dev, 0), ATUSB_BUILD,
663 ATUSB_REQ_FROM_DEV, 0, 0, build, ATUSB_BUILD_SIZE, 1000);
666 dev_info(&usb_dev->dev, "Firmware: build %s\n", build);
673 static int atusb_get_and_show_chip(struct atusb *atusb)
675 struct usb_device *usb_dev = atusb->usb_dev;
676 uint8_t man_id_0, man_id_1, part_num, version_num;
679 man_id_0 = atusb_read_reg(atusb, RG_MAN_ID_0);
680 man_id_1 = atusb_read_reg(atusb, RG_MAN_ID_1);
681 part_num = atusb_read_reg(atusb, RG_PART_NUM);
682 version_num = atusb_read_reg(atusb, RG_VERSION_NUM);
687 if ((man_id_1 << 8 | man_id_0) != ATUSB_JEDEC_ATMEL) {
688 dev_err(&usb_dev->dev,
689 "non-Atmel transceiver xxxx%02x%02x\n",
702 dev_err(&usb_dev->dev,
703 "unexpected transceiver, part 0x%02x version 0x%02x\n",
704 part_num, version_num);
708 dev_info(&usb_dev->dev, "ATUSB: %s version %d\n", chip, version_num);
713 atusb->err = -ENODEV;
717 static int atusb_set_extended_addr(struct atusb *atusb)
719 struct usb_device *usb_dev = atusb->usb_dev;
720 unsigned char *buffer;
721 __le64 extended_addr;
725 /* Firmware versions before 0.3 do not support the EUI64_READ command.
726 * Just use a random address and be done */
727 if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 3) {
728 ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
732 buffer = kmalloc(IEEE802154_EXTENDED_ADDR_LEN, GFP_KERNEL);
736 /* Firmware is new enough so we fetch the address from EEPROM */
737 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
738 ATUSB_EUI64_READ, ATUSB_REQ_FROM_DEV, 0, 0,
739 buffer, IEEE802154_EXTENDED_ADDR_LEN, 1000);
741 dev_err(&usb_dev->dev, "failed to fetch extended address, random address set\n");
742 ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
747 memcpy(&extended_addr, buffer, IEEE802154_EXTENDED_ADDR_LEN);
748 /* Check if read address is not empty and the unicast bit is set correctly */
749 if (!ieee802154_is_valid_extended_unicast_addr(extended_addr)) {
750 dev_info(&usb_dev->dev, "no permanent extended address found, random address set\n");
751 ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
753 atusb->hw->phy->perm_extended_addr = extended_addr;
754 addr = swab64((__force u64)atusb->hw->phy->perm_extended_addr);
755 dev_info(&usb_dev->dev, "Read permanent extended address %8phC from device\n",
763 /* ----- Setup ------------------------------------------------------------- */
765 static int atusb_probe(struct usb_interface *interface,
766 const struct usb_device_id *id)
768 struct usb_device *usb_dev = interface_to_usbdev(interface);
769 struct ieee802154_hw *hw;
770 struct atusb *atusb = NULL;
773 hw = ieee802154_alloc_hw(sizeof(struct atusb), &atusb_ops);
779 atusb->usb_dev = usb_get_dev(usb_dev);
780 usb_set_intfdata(interface, atusb);
784 INIT_DELAYED_WORK(&atusb->work, atusb_work_urbs);
785 init_usb_anchor(&atusb->idle_urbs);
786 init_usb_anchor(&atusb->rx_urbs);
788 if (atusb_alloc_urbs(atusb, ATUSB_NUM_RX_URBS))
791 atusb->tx_dr.bRequestType = ATUSB_REQ_TO_DEV;
792 atusb->tx_dr.bRequest = ATUSB_TX;
793 atusb->tx_dr.wValue = cpu_to_le16(0);
795 atusb->tx_urb = usb_alloc_urb(0, GFP_ATOMIC);
799 hw->parent = &usb_dev->dev;
800 hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT |
801 IEEE802154_HW_PROMISCUOUS | IEEE802154_HW_CSMA_PARAMS;
803 hw->phy->flags = WPAN_PHY_FLAG_TXPOWER | WPAN_PHY_FLAG_CCA_ED_LEVEL |
804 WPAN_PHY_FLAG_CCA_MODE;
806 hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) |
807 BIT(NL802154_CCA_CARRIER) | BIT(NL802154_CCA_ENERGY_CARRIER);
808 hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |
809 BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);
811 hw->phy->supported.cca_ed_levels = atusb_ed_levels;
812 hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(atusb_ed_levels);
814 hw->phy->cca.mode = NL802154_CCA_ENERGY;
816 hw->phy->current_page = 0;
817 hw->phy->current_channel = 11; /* reset default */
818 hw->phy->supported.channels[0] = 0x7FFF800;
819 hw->phy->supported.tx_powers = atusb_powers;
820 hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers);
821 hw->phy->transmit_power = hw->phy->supported.tx_powers[0];
822 hw->phy->cca_ed_level = hw->phy->supported.cca_ed_levels[7];
824 atusb_command(atusb, ATUSB_RF_RESET, 0);
825 atusb_get_and_show_chip(atusb);
826 atusb_get_and_show_revision(atusb);
827 atusb_get_and_show_build(atusb);
828 atusb_set_extended_addr(atusb);
830 if (atusb->fw_ver_maj >= 0 && atusb->fw_ver_min >= 3)
831 hw->flags |= IEEE802154_HW_FRAME_RETRIES;
833 ret = atusb_get_and_clear_error(atusb);
835 dev_err(&atusb->usb_dev->dev,
836 "%s: initialization failed, error = %d\n",
841 ret = ieee802154_register_hw(hw);
845 /* If we just powered on, we're now in P_ON and need to enter TRX_OFF
846 * explicitly. Any resets after that will send us straight to TRX_OFF,
847 * making the command below redundant.
849 atusb_write_reg(atusb, RG_TRX_STATE, STATE_FORCE_TRX_OFF);
850 msleep(1); /* reset => TRX_OFF, tTR13 = 37 us */
853 /* Calculating the maximum time available to empty the frame buffer
856 * According to [1], the inter-frame gap is
857 * R * 20 * 16 us + 128 us
858 * where R is a random number from 0 to 7. Furthermore, we have 20 bit
859 * times (80 us at 250 kbps) of SHR of the next frame before the
860 * transceiver begins storing data in the frame buffer.
862 * This yields a minimum time of 208 us between the last data of a
863 * frame and the first data of the next frame. This time is further
864 * reduced by interrupt latency in the atusb firmware.
866 * atusb currently needs about 500 us to retrieve a maximum-sized
867 * frame. We therefore have to allow reception of a new frame to begin
868 * while we retrieve the previous frame.
870 * [1] "JN-AN-1035 Calculating data rates in an IEEE 802.15.4-based
871 * network", Jennic 2006.
872 * http://www.jennic.com/download_file.php?supportFile=JN-AN-1035%20Calculating%20802-15-4%20Data%20Rates-1v0.pdf
875 atusb_write_subreg(atusb, SR_RX_SAFE_MODE, 1);
877 atusb_write_reg(atusb, RG_IRQ_MASK, 0xff);
879 ret = atusb_get_and_clear_error(atusb);
883 dev_err(&atusb->usb_dev->dev,
884 "%s: setup failed, error = %d\n",
887 ieee802154_unregister_hw(hw);
889 atusb_free_urbs(atusb);
890 usb_kill_urb(atusb->tx_urb);
891 usb_free_urb(atusb->tx_urb);
892 usb_put_dev(usb_dev);
893 ieee802154_free_hw(hw);
897 static void atusb_disconnect(struct usb_interface *interface)
899 struct atusb *atusb = usb_get_intfdata(interface);
901 dev_dbg(&atusb->usb_dev->dev, "atusb_disconnect\n");
904 cancel_delayed_work_sync(&atusb->work);
906 usb_kill_anchored_urbs(&atusb->rx_urbs);
907 atusb_free_urbs(atusb);
908 usb_kill_urb(atusb->tx_urb);
909 usb_free_urb(atusb->tx_urb);
911 ieee802154_unregister_hw(atusb->hw);
913 usb_put_dev(atusb->usb_dev);
915 ieee802154_free_hw(atusb->hw);
917 usb_set_intfdata(interface, NULL);
919 pr_debug("atusb_disconnect done\n");
922 /* The devices we work with */
923 static const struct usb_device_id atusb_device_table[] = {
925 .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
926 USB_DEVICE_ID_MATCH_INT_INFO,
927 .idVendor = ATUSB_VENDOR_ID,
928 .idProduct = ATUSB_PRODUCT_ID,
929 .bInterfaceClass = USB_CLASS_VENDOR_SPEC
931 /* end with null element */
934 MODULE_DEVICE_TABLE(usb, atusb_device_table);
936 static struct usb_driver atusb_driver = {
938 .probe = atusb_probe,
939 .disconnect = atusb_disconnect,
940 .id_table = atusb_device_table,
942 module_usb_driver(atusb_driver);
944 MODULE_AUTHOR("Alexander Aring <alex.aring@gmail.com>");
945 MODULE_AUTHOR("Richard Sharpe <realrichardsharpe@gmail.com>");
946 MODULE_AUTHOR("Stefan Schmidt <stefan@datenfreihafen.org>");
947 MODULE_AUTHOR("Werner Almesberger <werner@almesberger.net>");
948 MODULE_DESCRIPTION("ATUSB IEEE 802.15.4 Driver");
949 MODULE_LICENSE("GPL");