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);
89 dev_err(&usb_dev->dev,
90 "atusb_control_msg: req 0x%02x val 0x%x idx 0x%x, error %d\n",
91 request, value, index, ret);
96 static int atusb_command(struct atusb *atusb, uint8_t cmd, uint8_t arg)
98 struct usb_device *usb_dev = atusb->usb_dev;
100 dev_dbg(&usb_dev->dev, "atusb_command: cmd = 0x%x\n", cmd);
101 return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0),
102 cmd, ATUSB_REQ_TO_DEV, arg, 0, NULL, 0, 1000);
105 static int atusb_write_reg(struct atusb *atusb, uint8_t reg, uint8_t value)
107 struct usb_device *usb_dev = atusb->usb_dev;
109 dev_dbg(&usb_dev->dev, "atusb_write_reg: 0x%02x <- 0x%02x\n",
111 return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0),
112 ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
113 value, reg, NULL, 0, 1000);
116 static int atusb_read_reg(struct atusb *atusb, uint8_t reg)
118 struct usb_device *usb_dev = atusb->usb_dev;
123 buffer = kmalloc(1, GFP_KERNEL);
127 dev_dbg(&usb_dev->dev, "atusb: reg = 0x%x\n", reg);
128 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
129 ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
130 0, reg, buffer, 1, 1000);
142 static int atusb_write_subreg(struct atusb *atusb, uint8_t reg, uint8_t mask,
143 uint8_t shift, uint8_t value)
145 struct usb_device *usb_dev = atusb->usb_dev;
149 dev_dbg(&usb_dev->dev, "atusb_write_subreg: 0x%02x <- 0x%02x\n",
152 orig = atusb_read_reg(atusb, reg);
154 /* Write the value only into that part of the register which is allowed
155 * by the mask. All other bits stay as before.
158 tmp |= (value << shift) & mask;
161 ret = atusb_write_reg(atusb, reg, tmp);
166 static int atusb_get_and_clear_error(struct atusb *atusb)
168 int err = atusb->err;
174 /* ----- skb allocation ---------------------------------------------------- */
177 #define MAX_RX_XFER (1 + MAX_PSDU + 2 + 1) /* PHR+PSDU+CRC+LQI */
179 #define SKB_ATUSB(skb) (*(struct atusb **)(skb)->cb)
181 static void atusb_in(struct urb *urb);
183 static int atusb_submit_rx_urb(struct atusb *atusb, struct urb *urb)
185 struct usb_device *usb_dev = atusb->usb_dev;
186 struct sk_buff *skb = urb->context;
190 skb = alloc_skb(MAX_RX_XFER, GFP_KERNEL);
192 dev_warn_ratelimited(&usb_dev->dev,
193 "atusb_in: can't allocate skb\n");
196 skb_put(skb, MAX_RX_XFER);
197 SKB_ATUSB(skb) = atusb;
200 usb_fill_bulk_urb(urb, usb_dev, usb_rcvbulkpipe(usb_dev, 1),
201 skb->data, MAX_RX_XFER, atusb_in, skb);
202 usb_anchor_urb(urb, &atusb->rx_urbs);
204 ret = usb_submit_urb(urb, GFP_KERNEL);
206 usb_unanchor_urb(urb);
213 static void atusb_work_urbs(struct work_struct *work)
215 struct atusb *atusb =
216 container_of(to_delayed_work(work), struct atusb, work);
217 struct usb_device *usb_dev = atusb->usb_dev;
225 urb = usb_get_from_anchor(&atusb->idle_urbs);
228 ret = atusb_submit_rx_urb(atusb, urb);
231 usb_anchor_urb(urb, &atusb->idle_urbs);
232 dev_warn_ratelimited(&usb_dev->dev,
233 "atusb_in: can't allocate/submit URB (%d)\n", ret);
234 schedule_delayed_work(&atusb->work,
235 msecs_to_jiffies(ATUSB_ALLOC_DELAY_MS) + 1);
238 /* ----- Asynchronous USB -------------------------------------------------- */
240 static void atusb_tx_done(struct atusb *atusb, uint8_t seq)
242 struct usb_device *usb_dev = atusb->usb_dev;
243 uint8_t expect = atusb->tx_ack_seq;
245 dev_dbg(&usb_dev->dev, "atusb_tx_done (0x%02x/0x%02x)\n", seq, expect);
247 /* TODO check for ifs handling in firmware */
248 ieee802154_xmit_complete(atusb->hw, atusb->tx_skb, false);
250 /* TODO I experience this case when atusb has a tx complete
251 * irq before probing, we should fix the firmware it's an
252 * unlikely case now that seq == expect is then true, but can
253 * happen and fail with a tx_skb = NULL;
255 ieee802154_wake_queue(atusb->hw);
257 dev_kfree_skb_irq(atusb->tx_skb);
261 static void atusb_in_good(struct urb *urb)
263 struct usb_device *usb_dev = urb->dev;
264 struct sk_buff *skb = urb->context;
265 struct atusb *atusb = SKB_ATUSB(skb);
268 if (!urb->actual_length) {
269 dev_dbg(&usb_dev->dev, "atusb_in: zero-sized URB ?\n");
275 if (urb->actual_length == 1) {
276 atusb_tx_done(atusb, len);
280 if (len + 1 > urb->actual_length - 1) {
281 dev_dbg(&usb_dev->dev, "atusb_in: frame len %d+1 > URB %u-1\n",
282 len, urb->actual_length);
286 if (!ieee802154_is_valid_psdu_len(len)) {
287 dev_dbg(&usb_dev->dev, "atusb_in: frame corrupted\n");
291 lqi = skb->data[len + 1];
292 dev_dbg(&usb_dev->dev, "atusb_in: rx len %d lqi 0x%02x\n", len, lqi);
293 skb_pull(skb, 1); /* remove PHR */
294 skb_trim(skb, len); /* get payload only */
295 ieee802154_rx_irqsafe(atusb->hw, skb, lqi);
296 urb->context = NULL; /* skb is gone */
299 static void atusb_in(struct urb *urb)
301 struct usb_device *usb_dev = urb->dev;
302 struct sk_buff *skb = urb->context;
303 struct atusb *atusb = SKB_ATUSB(skb);
305 dev_dbg(&usb_dev->dev, "atusb_in: status %d len %d\n",
306 urb->status, urb->actual_length);
308 if (urb->status == -ENOENT) { /* being killed */
313 dev_dbg(&usb_dev->dev, "atusb_in: URB error %d\n", urb->status);
318 usb_anchor_urb(urb, &atusb->idle_urbs);
319 if (!atusb->shutdown)
320 schedule_delayed_work(&atusb->work, 0);
323 /* ----- URB allocation/deallocation --------------------------------------- */
325 static void atusb_free_urbs(struct atusb *atusb)
330 urb = usb_get_from_anchor(&atusb->idle_urbs);
333 kfree_skb(urb->context);
338 static int atusb_alloc_urbs(struct atusb *atusb, int n)
343 urb = usb_alloc_urb(0, GFP_KERNEL);
345 atusb_free_urbs(atusb);
348 usb_anchor_urb(urb, &atusb->idle_urbs);
355 /* ----- IEEE 802.15.4 interface operations -------------------------------- */
357 static void atusb_xmit_complete(struct urb *urb)
359 dev_dbg(&urb->dev->dev, "atusb_xmit urb completed");
362 static int atusb_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
364 struct atusb *atusb = hw->priv;
365 struct usb_device *usb_dev = atusb->usb_dev;
368 dev_dbg(&usb_dev->dev, "atusb_xmit (%d)\n", skb->len);
371 atusb->tx_dr.wIndex = cpu_to_le16(atusb->tx_ack_seq);
372 atusb->tx_dr.wLength = cpu_to_le16(skb->len);
374 usb_fill_control_urb(atusb->tx_urb, usb_dev,
375 usb_sndctrlpipe(usb_dev, 0),
376 (unsigned char *)&atusb->tx_dr, skb->data,
377 skb->len, atusb_xmit_complete, NULL);
378 ret = usb_submit_urb(atusb->tx_urb, GFP_ATOMIC);
379 dev_dbg(&usb_dev->dev, "atusb_xmit done (%d)\n", ret);
383 static int atusb_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
385 struct atusb *atusb = hw->priv;
388 ret = atusb_write_subreg(atusb, SR_CHANNEL, channel);
391 msleep(1); /* @@@ ugly synchronization */
395 static int atusb_ed(struct ieee802154_hw *hw, u8 *level)
402 static int atusb_set_hw_addr_filt(struct ieee802154_hw *hw,
403 struct ieee802154_hw_addr_filt *filt,
404 unsigned long changed)
406 struct atusb *atusb = hw->priv;
407 struct device *dev = &atusb->usb_dev->dev;
409 if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
410 u16 addr = le16_to_cpu(filt->short_addr);
412 dev_vdbg(dev, "atusb_set_hw_addr_filt called for saddr\n");
413 atusb_write_reg(atusb, RG_SHORT_ADDR_0, addr);
414 atusb_write_reg(atusb, RG_SHORT_ADDR_1, addr >> 8);
417 if (changed & IEEE802154_AFILT_PANID_CHANGED) {
418 u16 pan = le16_to_cpu(filt->pan_id);
420 dev_vdbg(dev, "atusb_set_hw_addr_filt called for pan id\n");
421 atusb_write_reg(atusb, RG_PAN_ID_0, pan);
422 atusb_write_reg(atusb, RG_PAN_ID_1, pan >> 8);
425 if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
426 u8 i, addr[IEEE802154_EXTENDED_ADDR_LEN];
428 memcpy(addr, &filt->ieee_addr, IEEE802154_EXTENDED_ADDR_LEN);
429 dev_vdbg(dev, "atusb_set_hw_addr_filt called for IEEE addr\n");
430 for (i = 0; i < 8; i++)
431 atusb_write_reg(atusb, RG_IEEE_ADDR_0 + i, addr[i]);
434 if (changed & IEEE802154_AFILT_PANC_CHANGED) {
436 "atusb_set_hw_addr_filt called for panc change\n");
438 atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 1);
440 atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 0);
443 return atusb_get_and_clear_error(atusb);
446 static int atusb_start(struct ieee802154_hw *hw)
448 struct atusb *atusb = hw->priv;
449 struct usb_device *usb_dev = atusb->usb_dev;
452 dev_dbg(&usb_dev->dev, "atusb_start\n");
453 schedule_delayed_work(&atusb->work, 0);
454 atusb_command(atusb, ATUSB_RX_MODE, 1);
455 ret = atusb_get_and_clear_error(atusb);
457 usb_kill_anchored_urbs(&atusb->idle_urbs);
461 static void atusb_stop(struct ieee802154_hw *hw)
463 struct atusb *atusb = hw->priv;
464 struct usb_device *usb_dev = atusb->usb_dev;
466 dev_dbg(&usb_dev->dev, "atusb_stop\n");
467 usb_kill_anchored_urbs(&atusb->idle_urbs);
468 atusb_command(atusb, ATUSB_RX_MODE, 0);
469 atusb_get_and_clear_error(atusb);
472 #define ATUSB_MAX_TX_POWERS 0xF
473 static const s32 atusb_powers[ATUSB_MAX_TX_POWERS + 1] = {
474 300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700,
479 atusb_set_txpower(struct ieee802154_hw *hw, s32 mbm)
481 struct atusb *atusb = hw->priv;
484 for (i = 0; i < hw->phy->supported.tx_powers_size; i++) {
485 if (hw->phy->supported.tx_powers[i] == mbm)
486 return atusb_write_subreg(atusb, SR_TX_PWR_23X, i);
492 #define ATUSB_MAX_ED_LEVELS 0xF
493 static const s32 atusb_ed_levels[ATUSB_MAX_ED_LEVELS + 1] = {
494 -9100, -8900, -8700, -8500, -8300, -8100, -7900, -7700, -7500, -7300,
495 -7100, -6900, -6700, -6500, -6300, -6100,
499 atusb_set_cca_mode(struct ieee802154_hw *hw, const struct wpan_phy_cca *cca)
501 struct atusb *atusb = hw->priv;
504 /* mapping 802.15.4 to driver spec */
506 case NL802154_CCA_ENERGY:
509 case NL802154_CCA_CARRIER:
512 case NL802154_CCA_ENERGY_CARRIER:
514 case NL802154_CCA_OPT_ENERGY_CARRIER_AND:
517 case NL802154_CCA_OPT_ENERGY_CARRIER_OR:
528 return atusb_write_subreg(atusb, SR_CCA_MODE, val);
532 atusb_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
534 struct atusb *atusb = hw->priv;
537 for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) {
538 if (hw->phy->supported.cca_ed_levels[i] == mbm)
539 return atusb_write_subreg(atusb, SR_CCA_ED_THRES, i);
546 atusb_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be, u8 retries)
548 struct atusb *atusb = hw->priv;
551 ret = atusb_write_subreg(atusb, SR_MIN_BE, min_be);
555 ret = atusb_write_subreg(atusb, SR_MAX_BE, max_be);
559 return atusb_write_subreg(atusb, SR_MAX_CSMA_RETRIES, retries);
563 atusb_set_frame_retries(struct ieee802154_hw *hw, s8 retries)
565 struct atusb *atusb = hw->priv;
567 return atusb_write_subreg(atusb, SR_MAX_FRAME_RETRIES, retries);
571 atusb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
573 struct atusb *atusb = hw->priv;
577 ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 1);
581 ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 1);
585 ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 0);
589 ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 0);
597 static const struct ieee802154_ops atusb_ops = {
598 .owner = THIS_MODULE,
599 .xmit_async = atusb_xmit,
601 .set_channel = atusb_channel,
602 .start = atusb_start,
604 .set_hw_addr_filt = atusb_set_hw_addr_filt,
605 .set_txpower = atusb_set_txpower,
606 .set_cca_mode = atusb_set_cca_mode,
607 .set_cca_ed_level = atusb_set_cca_ed_level,
608 .set_csma_params = atusb_set_csma_params,
609 .set_frame_retries = atusb_set_frame_retries,
610 .set_promiscuous_mode = atusb_set_promiscuous_mode,
613 /* ----- Firmware and chip version information ----------------------------- */
615 static int atusb_get_and_show_revision(struct atusb *atusb)
617 struct usb_device *usb_dev = atusb->usb_dev;
618 unsigned char *buffer;
621 buffer = kmalloc(3, GFP_KERNEL);
625 /* Get a couple of the ATMega Firmware values */
626 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
627 ATUSB_ID, ATUSB_REQ_FROM_DEV, 0, 0,
630 atusb->fw_ver_maj = buffer[0];
631 atusb->fw_ver_min = buffer[1];
632 atusb->fw_hw_type = buffer[2];
634 dev_info(&usb_dev->dev,
635 "Firmware: major: %u, minor: %u, hardware type: %u\n",
636 atusb->fw_ver_maj, atusb->fw_ver_min, atusb->fw_hw_type);
638 if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 2) {
639 dev_info(&usb_dev->dev,
640 "Firmware version (%u.%u) predates our first public release.",
641 atusb->fw_ver_maj, atusb->fw_ver_min);
642 dev_info(&usb_dev->dev, "Please update to version 0.2 or newer");
649 static int atusb_get_and_show_build(struct atusb *atusb)
651 struct usb_device *usb_dev = atusb->usb_dev;
655 build = kmalloc(ATUSB_BUILD_SIZE + 1, GFP_KERNEL);
659 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
660 ATUSB_BUILD, ATUSB_REQ_FROM_DEV, 0, 0,
661 build, ATUSB_BUILD_SIZE, 1000);
664 dev_info(&usb_dev->dev, "Firmware: build %s\n", build);
671 static int atusb_get_and_show_chip(struct atusb *atusb)
673 struct usb_device *usb_dev = atusb->usb_dev;
674 uint8_t man_id_0, man_id_1, part_num, version_num;
677 man_id_0 = atusb_read_reg(atusb, RG_MAN_ID_0);
678 man_id_1 = atusb_read_reg(atusb, RG_MAN_ID_1);
679 part_num = atusb_read_reg(atusb, RG_PART_NUM);
680 version_num = atusb_read_reg(atusb, RG_VERSION_NUM);
685 if ((man_id_1 << 8 | man_id_0) != ATUSB_JEDEC_ATMEL) {
686 dev_err(&usb_dev->dev,
687 "non-Atmel transceiver xxxx%02x%02x\n",
700 dev_err(&usb_dev->dev,
701 "unexpected transceiver, part 0x%02x version 0x%02x\n",
702 part_num, version_num);
706 dev_info(&usb_dev->dev, "ATUSB: %s version %d\n", chip, version_num);
711 atusb->err = -ENODEV;
715 static int atusb_set_extended_addr(struct atusb *atusb)
717 struct usb_device *usb_dev = atusb->usb_dev;
718 unsigned char *buffer;
719 __le64 extended_addr;
723 /* Firmware versions before 0.3 do not support the EUI64_READ command.
724 * Just use a random address and be done */
725 if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 3) {
726 ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
730 buffer = kmalloc(IEEE802154_EXTENDED_ADDR_LEN, GFP_KERNEL);
734 /* Firmware is new enough so we fetch the address from EEPROM */
735 ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
736 ATUSB_EUI64_READ, ATUSB_REQ_FROM_DEV, 0, 0,
737 buffer, IEEE802154_EXTENDED_ADDR_LEN, 1000);
739 dev_err(&usb_dev->dev, "failed to fetch extended address, random address set\n");
740 ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
745 memcpy(&extended_addr, buffer, IEEE802154_EXTENDED_ADDR_LEN);
746 /* Check if read address is not empty and the unicast bit is set correctly */
747 if (!ieee802154_is_valid_extended_unicast_addr(extended_addr)) {
748 dev_info(&usb_dev->dev, "no permanent extended address found, random address set\n");
749 ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
751 atusb->hw->phy->perm_extended_addr = extended_addr;
752 addr = swab64((__force u64)atusb->hw->phy->perm_extended_addr);
753 dev_info(&usb_dev->dev, "Read permanent extended address %8phC from device\n",
761 /* ----- Setup ------------------------------------------------------------- */
763 static int atusb_probe(struct usb_interface *interface,
764 const struct usb_device_id *id)
766 struct usb_device *usb_dev = interface_to_usbdev(interface);
767 struct ieee802154_hw *hw;
768 struct atusb *atusb = NULL;
771 hw = ieee802154_alloc_hw(sizeof(struct atusb), &atusb_ops);
777 atusb->usb_dev = usb_get_dev(usb_dev);
778 usb_set_intfdata(interface, atusb);
782 INIT_DELAYED_WORK(&atusb->work, atusb_work_urbs);
783 init_usb_anchor(&atusb->idle_urbs);
784 init_usb_anchor(&atusb->rx_urbs);
786 if (atusb_alloc_urbs(atusb, ATUSB_NUM_RX_URBS))
789 atusb->tx_dr.bRequestType = ATUSB_REQ_TO_DEV;
790 atusb->tx_dr.bRequest = ATUSB_TX;
791 atusb->tx_dr.wValue = cpu_to_le16(0);
793 atusb->tx_urb = usb_alloc_urb(0, GFP_ATOMIC);
797 hw->parent = &usb_dev->dev;
798 hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT |
799 IEEE802154_HW_PROMISCUOUS | IEEE802154_HW_CSMA_PARAMS;
801 hw->phy->flags = WPAN_PHY_FLAG_TXPOWER | WPAN_PHY_FLAG_CCA_ED_LEVEL |
802 WPAN_PHY_FLAG_CCA_MODE;
804 hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) |
805 BIT(NL802154_CCA_CARRIER) | BIT(NL802154_CCA_ENERGY_CARRIER);
806 hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |
807 BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);
809 hw->phy->supported.cca_ed_levels = atusb_ed_levels;
810 hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(atusb_ed_levels);
812 hw->phy->cca.mode = NL802154_CCA_ENERGY;
814 hw->phy->current_page = 0;
815 hw->phy->current_channel = 11; /* reset default */
816 hw->phy->supported.channels[0] = 0x7FFF800;
817 hw->phy->supported.tx_powers = atusb_powers;
818 hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers);
819 hw->phy->transmit_power = hw->phy->supported.tx_powers[0];
820 hw->phy->cca_ed_level = hw->phy->supported.cca_ed_levels[7];
822 atusb_command(atusb, ATUSB_RF_RESET, 0);
823 atusb_get_and_show_chip(atusb);
824 atusb_get_and_show_revision(atusb);
825 atusb_get_and_show_build(atusb);
826 atusb_set_extended_addr(atusb);
828 if (atusb->fw_ver_maj >= 0 && atusb->fw_ver_min >= 3)
829 hw->flags |= IEEE802154_HW_FRAME_RETRIES;
831 ret = atusb_get_and_clear_error(atusb);
833 dev_err(&atusb->usb_dev->dev,
834 "%s: initialization failed, error = %d\n",
839 ret = ieee802154_register_hw(hw);
843 /* If we just powered on, we're now in P_ON and need to enter TRX_OFF
844 * explicitly. Any resets after that will send us straight to TRX_OFF,
845 * making the command below redundant.
847 atusb_write_reg(atusb, RG_TRX_STATE, STATE_FORCE_TRX_OFF);
848 msleep(1); /* reset => TRX_OFF, tTR13 = 37 us */
851 /* Calculating the maximum time available to empty the frame buffer
854 * According to [1], the inter-frame gap is
855 * R * 20 * 16 us + 128 us
856 * where R is a random number from 0 to 7. Furthermore, we have 20 bit
857 * times (80 us at 250 kbps) of SHR of the next frame before the
858 * transceiver begins storing data in the frame buffer.
860 * This yields a minimum time of 208 us between the last data of a
861 * frame and the first data of the next frame. This time is further
862 * reduced by interrupt latency in the atusb firmware.
864 * atusb currently needs about 500 us to retrieve a maximum-sized
865 * frame. We therefore have to allow reception of a new frame to begin
866 * while we retrieve the previous frame.
868 * [1] "JN-AN-1035 Calculating data rates in an IEEE 802.15.4-based
869 * network", Jennic 2006.
870 * http://www.jennic.com/download_file.php?supportFile=JN-AN-1035%20Calculating%20802-15-4%20Data%20Rates-1v0.pdf
873 atusb_write_subreg(atusb, SR_RX_SAFE_MODE, 1);
875 atusb_write_reg(atusb, RG_IRQ_MASK, 0xff);
877 ret = atusb_get_and_clear_error(atusb);
881 dev_err(&atusb->usb_dev->dev,
882 "%s: setup failed, error = %d\n",
885 ieee802154_unregister_hw(hw);
887 atusb_free_urbs(atusb);
888 usb_kill_urb(atusb->tx_urb);
889 usb_free_urb(atusb->tx_urb);
890 usb_put_dev(usb_dev);
891 ieee802154_free_hw(hw);
895 static void atusb_disconnect(struct usb_interface *interface)
897 struct atusb *atusb = usb_get_intfdata(interface);
899 dev_dbg(&atusb->usb_dev->dev, "atusb_disconnect\n");
902 cancel_delayed_work_sync(&atusb->work);
904 usb_kill_anchored_urbs(&atusb->rx_urbs);
905 atusb_free_urbs(atusb);
906 usb_kill_urb(atusb->tx_urb);
907 usb_free_urb(atusb->tx_urb);
909 ieee802154_unregister_hw(atusb->hw);
911 usb_put_dev(atusb->usb_dev);
913 ieee802154_free_hw(atusb->hw);
915 usb_set_intfdata(interface, NULL);
917 pr_debug("atusb_disconnect done\n");
920 /* The devices we work with */
921 static const struct usb_device_id atusb_device_table[] = {
923 .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
924 USB_DEVICE_ID_MATCH_INT_INFO,
925 .idVendor = ATUSB_VENDOR_ID,
926 .idProduct = ATUSB_PRODUCT_ID,
927 .bInterfaceClass = USB_CLASS_VENDOR_SPEC
929 /* end with null element */
932 MODULE_DEVICE_TABLE(usb, atusb_device_table);
934 static struct usb_driver atusb_driver = {
936 .probe = atusb_probe,
937 .disconnect = atusb_disconnect,
938 .id_table = atusb_device_table,
940 module_usb_driver(atusb_driver);
942 MODULE_AUTHOR("Alexander Aring <alex.aring@gmail.com>");
943 MODULE_AUTHOR("Richard Sharpe <realrichardsharpe@gmail.com>");
944 MODULE_AUTHOR("Stefan Schmidt <stefan@datenfreihafen.org>");
945 MODULE_AUTHOR("Werner Almesberger <werner@almesberger.net>");
946 MODULE_DESCRIPTION("ATUSB IEEE 802.15.4 Driver");
947 MODULE_LICENSE("GPL");