// SPDX-License-Identifier: GPL-2.0-only
/*
* atusb . c - Driver for the ATUSB IEEE 802 . 15 . 4 dongle
*
* Written 2013 by Werner Almesberger < werner @ almesberger . net >
*
* Copyright ( c ) 2015 - 2016 Stefan Schmidt < stefan @ datenfreihafen . org >
*
* Based on at86rf230 . c and spi_atusb . c .
* at86rf230 . c is
* Copyright ( C ) 2009 Siemens AG
* Written by : Dmitry Eremin - Solenikov < dmitry . baryshkov @ siemens . com >
*
* spi_atusb . c is
* Copyright ( c ) 2011 Richard Sharpe < realrichardsharpe @ gmail . com >
* Copyright ( c ) 2011 Stefan Schmidt < stefan @ datenfreihafen . org >
* Copyright ( c ) 2011 Werner Almesberger < werner @ almesberger . net >
*
* USB initialization is
* Copyright ( c ) 2013 Alexander Aring < alex . aring @ gmail . com >
*
* Busware HUL support is
* Copyright ( c ) 2017 Josef Filzmaier < j . filzmaier @ gmx . at >
*/
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/usb.h>
#include <linux/skbuff.h>
#include <net/cfg802154.h>
#include <net/mac802154.h>
#include "at86rf230.h"
#include "atusb.h"
#define ATUSB_JEDEC_ATMEL 0 x1f /* JEDEC manufacturer ID */
#define ATUSB_NUM_RX_URBS 4 /* allow for a bit of local latency */
#define ATUSB_ALLOC_DELAY_MS 100 /* delay after failed allocation */
#define ATUSB_TX_TIMEOUT_MS 200 /* on the air timeout */
struct atusb {
struct ieee802154_hw *hw;
struct usb_device *usb_dev;
struct atusb_chip_data *data;
int shutdown; /* non-zero if shutting down */
int err; /* set by first error */
/* RX variables */
struct delayed_work work; /* memory allocations */
struct usb_anchor idle_urbs; /* URBs waiting to be submitted */
struct usb_anchor rx_urbs; /* URBs waiting for reception */
/* TX variables */
struct usb_ctrlrequest tx_dr;
struct urb *tx_urb;
struct sk_buff *tx_skb;
u8 tx_ack_seq; /* current TX ACK sequence number */
/* Firmware variable */
unsigned char fw_ver_maj; /* Firmware major version number */
unsigned char fw_ver_min; /* Firmware minor version number */
unsigned char fw_hw_type; /* Firmware hardware type */
};
struct atusb_chip_data {
u16 t_channel_switch;
int rssi_base_val;
int (*set_channel)(struct ieee802154_hw*, u8, u8);
int (*set_txpower)(struct ieee802154_hw*, s32);
};
static int atusb_write_subreg(struct atusb *atusb, u8 reg, u8 mask,
u8 shift, u8 value)
{
struct usb_device *usb_dev = atusb->usb_dev;
u8 orig, tmp;
int ret = 0 ;
dev_dbg(&usb_dev->dev, "%s: 0x%02x <- 0x%02x\n" , __func__, reg, value);
ret = usb_control_msg_recv(usb_dev, 0 , ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
0 , reg, &orig, 1 , 1000 , GFP_KERNEL);
if (ret < 0 )
return ret;
/* Write the value only into that part of the register which is allowed
* by the mask . All other bits stay as before .
*/
tmp = orig & ~mask;
tmp |= (value << shift) & mask;
if (tmp != orig)
ret = usb_control_msg_send(usb_dev, 0 , ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
tmp, reg, NULL, 0 , 1000 , GFP_KERNEL);
return ret;
}
static int atusb_read_subreg(struct atusb *lp,
unsigned int addr, unsigned int mask,
unsigned int shift)
{
int reg, ret;
ret = usb_control_msg_recv(lp->usb_dev, 0 , ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
0 , addr, ®, 1 , 1000 , GFP_KERNEL);
if (ret < 0 )
return ret;
reg = (reg & mask) >> shift;
return reg;
}
static int atusb_get_and_clear_error(struct atusb *atusb)
{
int err = atusb->err;
atusb->err = 0 ;
return err;
}
/* ----- skb allocation ---------------------------------------------------- */
#define MAX_PSDU 127
#define MAX_RX_XFER (1 + MAX_PSDU + 2 + 1 ) /* PHR+PSDU+CRC+LQI */
#define SKB_ATUSB(skb) (*(struct atusb **)(skb)->cb)
static void atusb_in(struct urb *urb);
static int atusb_submit_rx_urb(struct atusb *atusb, struct urb *urb)
{
struct usb_device *usb_dev = atusb->usb_dev;
struct sk_buff *skb = urb->context;
int ret;
if (!skb) {
skb = alloc_skb(MAX_RX_XFER, GFP_KERNEL);
if (!skb) {
dev_warn_ratelimited(&usb_dev->dev,
"atusb_in: can't allocate skb\n" );
return -ENOMEM;
}
skb_put(skb, MAX_RX_XFER);
SKB_ATUSB(skb) = atusb;
}
usb_fill_bulk_urb(urb, usb_dev, usb_rcvbulkpipe(usb_dev, 1 ),
skb->data, MAX_RX_XFER, atusb_in, skb);
usb_anchor_urb(urb, &atusb->rx_urbs);
ret = usb_submit_urb(urb, GFP_KERNEL);
if (ret) {
usb_unanchor_urb(urb);
kfree_skb(skb);
urb->context = NULL;
}
return ret;
}
static void atusb_work_urbs(struct work_struct *work)
{
struct atusb *atusb =
container_of(to_delayed_work(work), struct atusb, work);
struct usb_device *usb_dev = atusb->usb_dev;
struct urb *urb;
int ret;
if (atusb->shutdown)
return ;
do {
urb = usb_get_from_anchor(&atusb->idle_urbs);
if (!urb)
return ;
ret = atusb_submit_rx_urb(atusb, urb);
} while (!ret);
usb_anchor_urb(urb, &atusb->idle_urbs);
dev_warn_ratelimited(&usb_dev->dev,
"atusb_in: can't allocate/submit URB (%d)\n" , ret);
schedule_delayed_work(&atusb->work,
msecs_to_jiffies(ATUSB_ALLOC_DELAY_MS) + 1 );
}
/* ----- Asynchronous USB -------------------------------------------------- */
static void atusb_tx_done(struct atusb *atusb, u8 seq, int reason)
{
struct usb_device *usb_dev = atusb->usb_dev;
u8 expect = atusb->tx_ack_seq;
dev_dbg(&usb_dev->dev, "%s (0x%02x/0x%02x)\n" , __func__, seq, expect);
if (seq == expect) {
/* TODO check for ifs handling in firmware */
if (reason == IEEE802154_SUCCESS)
ieee802154_xmit_complete(atusb->hw, atusb->tx_skb, false );
else
ieee802154_xmit_error(atusb->hw, atusb->tx_skb, reason);
} else {
/* TODO I experience this case when atusb has a tx complete
* irq before probing , we should fix the firmware it ' s an
* unlikely case now that seq = = expect is then true , but can
* happen and fail with a tx_skb = NULL ;
*/
ieee802154_xmit_hw_error(atusb->hw, atusb->tx_skb);
}
}
static void atusb_in_good(struct urb *urb)
{
struct usb_device *usb_dev = urb->dev;
struct sk_buff *skb = urb->context;
struct atusb *atusb = SKB_ATUSB(skb);
int result = IEEE802154_SUCCESS;
u8 len, lqi, trac;
if (!urb->actual_length) {
dev_dbg(&usb_dev->dev, "atusb_in: zero-sized URB ?\n" );
return ;
}
len = *skb->data;
switch (urb->actual_length) {
case 2 :
trac = TRAC_MASK(*(skb->data + 1 ));
switch (trac) {
case TRAC_SUCCESS:
case TRAC_SUCCESS_DATA_PENDING:
/* already IEEE802154_SUCCESS */
break ;
case TRAC_CHANNEL_ACCESS_FAILURE:
result = IEEE802154_CHANNEL_ACCESS_FAILURE;
break ;
case TRAC_NO_ACK:
result = IEEE802154_NO_ACK;
break ;
default :
result = IEEE802154_SYSTEM_ERROR;
}
fallthrough;
case 1 :
atusb_tx_done(atusb, len, result);
return ;
}
if (len + 1 > urb->actual_length - 1 ) {
dev_dbg(&usb_dev->dev, "atusb_in: frame len %d+1 > URB %u-1\n" ,
len, urb->actual_length);
return ;
}
if (!ieee802154_is_valid_psdu_len(len)) {
dev_dbg(&usb_dev->dev, "atusb_in: frame corrupted\n" );
return ;
}
lqi = skb->data[len + 1 ];
dev_dbg(&usb_dev->dev, "atusb_in: rx len %d lqi 0x%02x\n" , len, lqi);
skb_pull(skb, 1 ); /* remove PHR */
skb_trim(skb, len); /* get payload only */
ieee802154_rx_irqsafe(atusb->hw, skb, lqi);
urb->context = NULL; /* skb is gone */
}
static void atusb_in(struct urb *urb)
{
struct usb_device *usb_dev = urb->dev;
struct sk_buff *skb = urb->context;
struct atusb *atusb = SKB_ATUSB(skb);
dev_dbg(&usb_dev->dev, "%s: status %d len %d\n" , __func__,
urb->status, urb->actual_length);
if (urb->status) {
if (urb->status == -ENOENT) { /* being killed */
kfree_skb(skb);
urb->context = NULL;
return ;
}
dev_dbg(&usb_dev->dev, "%s: URB error %d\n" , __func__, urb->status);
} else {
atusb_in_good(urb);
}
usb_anchor_urb(urb, &atusb->idle_urbs);
if (!atusb->shutdown)
schedule_delayed_work(&atusb->work, 0 );
}
/* ----- URB allocation/deallocation --------------------------------------- */
static void atusb_free_urbs(struct atusb *atusb)
{
struct urb *urb;
while (1 ) {
urb = usb_get_from_anchor(&atusb->idle_urbs);
if (!urb)
break ;
kfree_skb(urb->context);
usb_free_urb(urb);
}
}
static int atusb_alloc_urbs(struct atusb *atusb, int n)
{
struct urb *urb;
while (n) {
urb = usb_alloc_urb(0 , GFP_KERNEL);
if (!urb) {
atusb_free_urbs(atusb);
return -ENOMEM;
}
usb_anchor_urb(urb, &atusb->idle_urbs);
usb_free_urb(urb);
n--;
}
return 0 ;
}
/* ----- IEEE 802.15.4 interface operations -------------------------------- */
static void atusb_xmit_complete(struct urb *urb)
{
dev_dbg(&urb->dev->dev, "atusb_xmit urb completed" );
}
static int atusb_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
{
struct atusb *atusb = hw->priv;
struct usb_device *usb_dev = atusb->usb_dev;
int ret;
dev_dbg(&usb_dev->dev, "%s (%d)\n" , __func__, skb->len);
atusb->tx_skb = skb;
atusb->tx_ack_seq++;
atusb->tx_dr.wIndex = cpu_to_le16(atusb->tx_ack_seq);
atusb->tx_dr.wLength = cpu_to_le16(skb->len);
usb_fill_control_urb(atusb->tx_urb, usb_dev,
usb_sndctrlpipe(usb_dev, 0 ),
(unsigned char *)&atusb->tx_dr, skb->data,
skb->len, atusb_xmit_complete, NULL);
ret = usb_submit_urb(atusb->tx_urb, GFP_ATOMIC);
dev_dbg(&usb_dev->dev, "%s done (%d)\n" , __func__, ret);
return ret;
}
static int atusb_ed(struct ieee802154_hw *hw, u8 *level)
{
WARN_ON(!level);
*level = 0 xbe;
return 0 ;
}
static int atusb_set_hw_addr_filt(struct ieee802154_hw *hw,
struct ieee802154_hw_addr_filt *filt,
unsigned long changed)
{
struct atusb *atusb = hw->priv;
struct device *dev = &atusb->usb_dev->dev;
if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
u16 addr = le16_to_cpu(filt->short_addr);
dev_vdbg(dev, "%s called for saddr\n" , __func__);
usb_control_msg_send(atusb->usb_dev, 0 , ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
addr, RG_SHORT_ADDR_0, NULL, 0 , 1000 , GFP_KERNEL);
usb_control_msg_send(atusb->usb_dev, 0 , ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
addr >> 8 , RG_SHORT_ADDR_1, NULL, 0 , 1000 , GFP_KERNEL);
}
if (changed & IEEE802154_AFILT_PANID_CHANGED) {
u16 pan = le16_to_cpu(filt->pan_id);
dev_vdbg(dev, "%s called for pan id\n" , __func__);
usb_control_msg_send(atusb->usb_dev, 0 , ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
pan, RG_PAN_ID_0, NULL, 0 , 1000 , GFP_KERNEL);
usb_control_msg_send(atusb->usb_dev, 0 , ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
pan >> 8 , RG_PAN_ID_1, NULL, 0 , 1000 , GFP_KERNEL);
}
if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
u8 i, addr[IEEE802154_EXTENDED_ADDR_LEN];
memcpy(addr, &filt->ieee_addr, IEEE802154_EXTENDED_ADDR_LEN);
dev_vdbg(dev, "%s called for IEEE addr\n" , __func__);
for (i = 0 ; i < 8 ; i++)
usb_control_msg_send(atusb->usb_dev, 0 , ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
addr[i], RG_IEEE_ADDR_0 + i, NULL, 0 ,
1000 , GFP_KERNEL);
}
if (changed & IEEE802154_AFILT_PANC_CHANGED) {
dev_vdbg(dev, "%s called for panc change\n" , __func__);
if (filt->pan_coord)
atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 1 );
else
atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 0 );
}
return atusb_get_and_clear_error(atusb);
}
static int atusb_start(struct ieee802154_hw *hw)
{
struct atusb *atusb = hw->priv;
struct usb_device *usb_dev = atusb->usb_dev;
int ret;
dev_dbg(&usb_dev->dev, "%s\n" , __func__);
schedule_delayed_work(&atusb->work, 0 );
usb_control_msg_send(atusb->usb_dev, 0 , ATUSB_RX_MODE, ATUSB_REQ_TO_DEV, 1 , 0 ,
NULL, 0 , 1000 , GFP_KERNEL);
ret = atusb_get_and_clear_error(atusb);
if (ret < 0 )
usb_kill_anchored_urbs(&atusb->idle_urbs);
return ret;
}
static void atusb_stop(struct ieee802154_hw *hw)
{
struct atusb *atusb = hw->priv;
struct usb_device *usb_dev = atusb->usb_dev;
dev_dbg(&usb_dev->dev, "%s\n" , __func__);
usb_kill_anchored_urbs(&atusb->idle_urbs);
usb_control_msg_send(atusb->usb_dev, 0 , ATUSB_RX_MODE, ATUSB_REQ_TO_DEV, 0 , 0 ,
NULL, 0 , 1000 , GFP_KERNEL);
atusb_get_and_clear_error(atusb);
}
#define ATUSB_MAX_TX_POWERS 0 xF
static const s32 atusb_powers[ATUSB_MAX_TX_POWERS + 1 ] = {
300 , 280 , 230 , 180 , 130 , 70 , 0 , -100 , -200 , -300 , -400 , -500 , -700 ,
-900 , -1200 , -1700 ,
};
static int
atusb_txpower(struct ieee802154_hw *hw, s32 mbm)
{
struct atusb *atusb = hw->priv;
if (atusb->data)
return atusb->data->set_txpower(hw, mbm);
else
return -ENOTSUPP;
}
static int
atusb_set_txpower(struct ieee802154_hw *hw, s32 mbm)
{
struct atusb *atusb = hw->priv;
u32 i;
for (i = 0 ; i < hw->phy->supported.tx_powers_size; i++) {
if (hw->phy->supported.tx_powers[i] == mbm)
return atusb_write_subreg(atusb, SR_TX_PWR_23X, i);
}
return -EINVAL;
}
static int
hulusb_set_txpower(struct ieee802154_hw *hw, s32 mbm)
{
u32 i;
for (i = 0 ; i < hw->phy->supported.tx_powers_size; i++) {
if (hw->phy->supported.tx_powers[i] == mbm)
return atusb_write_subreg(hw->priv, SR_TX_PWR_212, i);
}
return -EINVAL;
}
#define ATUSB_MAX_ED_LEVELS 0 xF
static const s32 atusb_ed_levels[ATUSB_MAX_ED_LEVELS + 1 ] = {
-9100 , -8900 , -8700 , -8500 , -8300 , -8100 , -7900 , -7700 , -7500 , -7300 ,
-7100 , -6900 , -6700 , -6500 , -6300 , -6100 ,
};
#define AT86RF212_MAX_TX_POWERS 0 x1F
static const s32 at86rf212_powers[AT86RF212_MAX_TX_POWERS + 1 ] = {
500 , 400 , 300 , 200 , 100 , 0 , -100 , -200 , -300 , -400 , -500 , -600 , -700 ,
-800 , -900 , -1000 , -1100 , -1200 , -1300 , -1400 , -1500 , -1600 , -1700 ,
-1800 , -1900 , -2000 , -2100 , -2200 , -2300 , -2400 , -2500 , -2600 ,
};
#define AT86RF2XX_MAX_ED_LEVELS 0 xF
static const s32 at86rf212_ed_levels_100[AT86RF2XX_MAX_ED_LEVELS + 1 ] = {
-10000 , -9800 , -9600 , -9400 , -9200 , -9000 , -8800 , -8600 , -8400 , -8200 ,
-8000 , -7800 , -7600 , -7400 , -7200 , -7000 ,
};
static const s32 at86rf212_ed_levels_98[AT86RF2XX_MAX_ED_LEVELS + 1 ] = {
-9800 , -9600 , -9400 , -9200 , -9000 , -8800 , -8600 , -8400 , -8200 , -8000 ,
-7800 , -7600 , -7400 , -7200 , -7000 , -6800 ,
};
static int
atusb_set_cca_mode(struct ieee802154_hw *hw, const struct wpan_phy_cca *cca)
{
struct atusb *atusb = hw->priv;
u8 val;
/* mapping 802.15.4 to driver spec */
switch (cca->mode) {
case NL802154_CCA_ENERGY:
val = 1 ;
break ;
case NL802154_CCA_CARRIER:
val = 2 ;
break ;
case NL802154_CCA_ENERGY_CARRIER:
switch (cca->opt) {
case NL802154_CCA_OPT_ENERGY_CARRIER_AND:
val = 3 ;
break ;
case NL802154_CCA_OPT_ENERGY_CARRIER_OR:
val = 0 ;
break ;
default :
return -EINVAL;
}
break ;
default :
return -EINVAL;
}
return atusb_write_subreg(atusb, SR_CCA_MODE, val);
}
static int hulusb_set_cca_ed_level(struct atusb *lp, int rssi_base_val)
{
int cca_ed_thres;
cca_ed_thres = atusb_read_subreg(lp, SR_CCA_ED_THRES);
if (cca_ed_thres < 0 )
return cca_ed_thres;
switch (rssi_base_val) {
case -98 :
lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_98;
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_98);
lp->hw->phy->cca_ed_level = at86rf212_ed_levels_98[cca_ed_thres];
break ;
case -100 :
lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
lp->hw->phy->cca_ed_level = at86rf212_ed_levels_100[cca_ed_thres];
break ;
default :
WARN_ON(1 );
}
return 0 ;
}
static int
atusb_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
{
struct atusb *atusb = hw->priv;
u32 i;
for (i = 0 ; i < hw->phy->supported.cca_ed_levels_size; i++) {
if (hw->phy->supported.cca_ed_levels[i] == mbm)
return atusb_write_subreg(atusb, SR_CCA_ED_THRES, i);
}
return -EINVAL;
}
static int atusb_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
{
struct atusb *atusb = hw->priv;
int ret = -ENOTSUPP;
if (atusb->data) {
ret = atusb->data->set_channel(hw, page, channel);
/* @@@ ugly synchronization */
msleep(atusb->data->t_channel_switch);
}
return ret;
}
static int atusb_set_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
{
struct atusb *atusb = hw->priv;
int ret;
ret = atusb_write_subreg(atusb, SR_CHANNEL, channel);
if (ret < 0 )
return ret;
return 0 ;
}
static int hulusb_set_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
{
int rc;
int rssi_base_val;
struct atusb *lp = hw->priv;
if (channel == 0 )
rc = atusb_write_subreg(lp, SR_SUB_MODE, 0 );
else
rc = atusb_write_subreg(lp, SR_SUB_MODE, 1 );
if (rc < 0 )
return rc;
if (page == 0 ) {
rc = atusb_write_subreg(lp, SR_BPSK_QPSK, 0 );
rssi_base_val = -100 ;
} else {
rc = atusb_write_subreg(lp, SR_BPSK_QPSK, 1 );
rssi_base_val = -98 ;
}
if (rc < 0 )
return rc;
rc = hulusb_set_cca_ed_level(lp, rssi_base_val);
if (rc < 0 )
return rc;
return atusb_write_subreg(lp, SR_CHANNEL, channel);
}
static int
atusb_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be, u8 retries)
{
struct atusb *atusb = hw->priv;
int ret;
ret = atusb_write_subreg(atusb, SR_MIN_BE, min_be);
if (ret)
return ret;
ret = atusb_write_subreg(atusb, SR_MAX_BE, max_be);
if (ret)
return ret;
return atusb_write_subreg(atusb, SR_MAX_CSMA_RETRIES, retries);
}
static int
hulusb_set_lbt(struct ieee802154_hw *hw, bool on)
{
struct atusb *atusb = hw->priv;
return atusb_write_subreg(atusb, SR_CSMA_LBT_MODE, on);
}
static int
atusb_set_frame_retries(struct ieee802154_hw *hw, s8 retries)
{
struct atusb *atusb = hw->priv;
return atusb_write_subreg(atusb, SR_MAX_FRAME_RETRIES, retries);
}
static int
atusb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
{
struct atusb *atusb = hw->priv;
int ret;
if (on) {
ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 1 );
if (ret < 0 )
return ret;
ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 1 );
if (ret < 0 )
return ret;
} else {
ret = atusb_write_subreg(atusb, SR_AACK_PROM_MODE, 0 );
if (ret < 0 )
return ret;
ret = atusb_write_subreg(atusb, SR_AACK_DIS_ACK, 0 );
if (ret < 0 )
return ret;
}
return 0 ;
}
static struct atusb_chip_data atusb_chip_data = {
.t_channel_switch = 1 ,
.rssi_base_val = -91 ,
.set_txpower = atusb_set_txpower,
.set_channel = atusb_set_channel,
};
static struct atusb_chip_data hulusb_chip_data = {
.t_channel_switch = 11 ,
.rssi_base_val = -100 ,
.set_txpower = hulusb_set_txpower,
.set_channel = hulusb_set_channel,
};
static const struct ieee802154_ops atusb_ops = {
.owner = THIS_MODULE,
.xmit_async = atusb_xmit,
.ed = atusb_ed,
.set_channel = atusb_channel,
.start = atusb_start,
.stop = atusb_stop,
.set_hw_addr_filt = atusb_set_hw_addr_filt,
.set_txpower = atusb_txpower,
.set_lbt = hulusb_set_lbt,
.set_cca_mode = atusb_set_cca_mode,
.set_cca_ed_level = atusb_set_cca_ed_level,
.set_csma_params = atusb_set_csma_params,
.set_frame_retries = atusb_set_frame_retries,
.set_promiscuous_mode = atusb_set_promiscuous_mode,
};
/* ----- Firmware and chip version information ----------------------------- */
static int atusb_get_and_show_revision(struct atusb *atusb)
{
struct usb_device *usb_dev = atusb->usb_dev;
char *hw_name;
unsigned char buffer[3 ];
int ret;
/* Get a couple of the ATMega Firmware values */
ret = usb_control_msg_recv(atusb->usb_dev, 0 , ATUSB_ID, ATUSB_REQ_FROM_DEV, 0 , 0 ,
buffer, 3 , 1000 , GFP_KERNEL);
if (!ret) {
atusb->fw_ver_maj = buffer[0 ];
atusb->fw_ver_min = buffer[1 ];
atusb->fw_hw_type = buffer[2 ];
switch (atusb->fw_hw_type) {
case ATUSB_HW_TYPE_100813:
case ATUSB_HW_TYPE_101216:
case ATUSB_HW_TYPE_110131:
hw_name = "ATUSB" ;
atusb->data = &atusb_chip_data;
break ;
case ATUSB_HW_TYPE_RZUSB:
hw_name = "RZUSB" ;
atusb->data = &atusb_chip_data;
break ;
case ATUSB_HW_TYPE_HULUSB:
hw_name = "HULUSB" ;
atusb->data = &hulusb_chip_data;
break ;
default :
hw_name = "UNKNOWN" ;
atusb->err = -ENOTSUPP;
ret = -ENOTSUPP;
break ;
}
dev_info(&usb_dev->dev,
"Firmware: major: %u, minor: %u, hardware type: %s (%d)\n" ,
atusb->fw_ver_maj, atusb->fw_ver_min, hw_name,
atusb->fw_hw_type);
}
if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 2 ) {
dev_info(&usb_dev->dev,
"Firmware version (%u.%u) predates our first public release." ,
atusb->fw_ver_maj, atusb->fw_ver_min);
dev_info(&usb_dev->dev, "Please update to version 0.2 or newer" );
}
return ret;
}
static int atusb_get_and_show_build(struct atusb *atusb)
{
struct usb_device *usb_dev = atusb->usb_dev;
char *build;
int ret;
build = kmalloc(ATUSB_BUILD_SIZE + 1 , GFP_KERNEL);
if (!build)
return -ENOMEM;
ret = usb_control_msg(atusb->usb_dev, usb_rcvctrlpipe(usb_dev, 0 ), ATUSB_BUILD,
ATUSB_REQ_FROM_DEV, 0 , 0 , build, ATUSB_BUILD_SIZE, 1000 );
if (ret >= 0 ) {
build[ret] = 0 ;
dev_info(&usb_dev->dev, "Firmware: build %s\n" , build);
}
kfree(build);
return ret;
}
static int atusb_get_and_conf_chip(struct atusb *atusb)
{
struct usb_device *usb_dev = atusb->usb_dev;
u8 man_id_0, man_id_1, part_num, version_num;
const char *chip;
struct ieee802154_hw *hw = atusb->hw;
int ret;
ret = usb_control_msg_recv(usb_dev, 0 , ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
0 , RG_MAN_ID_0, &man_id_0, 1 , 1000 , GFP_KERNEL);
if (ret < 0 )
return ret;
ret = usb_control_msg_recv(usb_dev, 0 , ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
0 , RG_MAN_ID_1, &man_id_1, 1 , 1000 , GFP_KERNEL);
if (ret < 0 )
return ret;
ret = usb_control_msg_recv(usb_dev, 0 , ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
0 , RG_PART_NUM, &part_num, 1 , 1000 , GFP_KERNEL);
if (ret < 0 )
return ret;
ret = usb_control_msg_recv(usb_dev, 0 , ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
0 , RG_VERSION_NUM, &version_num, 1 , 1000 , GFP_KERNEL);
if (ret < 0 )
return ret;
hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT |
IEEE802154_HW_PROMISCUOUS | IEEE802154_HW_CSMA_PARAMS;
hw->phy->flags = WPAN_PHY_FLAG_TXPOWER | WPAN_PHY_FLAG_CCA_ED_LEVEL |
WPAN_PHY_FLAG_CCA_MODE;
hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY) |
BIT(NL802154_CCA_CARRIER) |
BIT(NL802154_CCA_ENERGY_CARRIER);
hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |
BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);
hw->phy->cca.mode = NL802154_CCA_ENERGY;
hw->phy->current_page = 0 ;
if ((man_id_1 << 8 | man_id_0) != ATUSB_JEDEC_ATMEL) {
dev_err(&usb_dev->dev,
"non-Atmel transceiver xxxx%02x%02x\n" ,
man_id_1, man_id_0);
goto fail;
}
switch (part_num) {
case 2 :
chip = "AT86RF230" ;
atusb->hw->phy->supported.channels[0 ] = 0 x7FFF800;
atusb->hw->phy->current_channel = 11 ; /* reset default */
atusb->hw->phy->supported.tx_powers = atusb_powers;
atusb->hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers);
hw->phy->supported.cca_ed_levels = atusb_ed_levels;
hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(atusb_ed_levels);
break ;
case 3 :
chip = "AT86RF231" ;
atusb->hw->phy->supported.channels[0 ] = 0 x7FFF800;
atusb->hw->phy->current_channel = 11 ; /* reset default */
atusb->hw->phy->supported.tx_powers = atusb_powers;
atusb->hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers);
hw->phy->supported.cca_ed_levels = atusb_ed_levels;
hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(atusb_ed_levels);
break ;
case 7 :
chip = "AT86RF212" ;
atusb->hw->flags |= IEEE802154_HW_LBT;
atusb->hw->phy->supported.channels[0 ] = 0 x00007FF;
atusb->hw->phy->supported.channels[2 ] = 0 x00007FF;
atusb->hw->phy->current_channel = 5 ;
atusb->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH;
atusb->hw->phy->supported.tx_powers = at86rf212_powers;
atusb->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers);
atusb->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
atusb->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
break ;
default :
dev_err(&usb_dev->dev,
"unexpected transceiver, part 0x%02x version 0x%02x\n" ,
part_num, version_num);
goto fail;
}
hw->phy->transmit_power = hw->phy->supported.tx_powers[0 ];
hw->phy->cca_ed_level = hw->phy->supported.cca_ed_levels[7 ];
dev_info(&usb_dev->dev, "ATUSB: %s version %d\n" , chip, version_num);
return 0 ;
fail:
atusb->err = -ENODEV;
return -ENODEV;
}
static int atusb_set_extended_addr(struct atusb *atusb)
{
struct usb_device *usb_dev = atusb->usb_dev;
unsigned char buffer[IEEE802154_EXTENDED_ADDR_LEN];
__le64 extended_addr;
u64 addr;
int ret;
/* Firmware versions before 0.3 do not support the EUI64_READ command.
* Just use a random address and be done .
*/
if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 3 ) {
ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
return 0 ;
}
/* Firmware is new enough so we fetch the address from EEPROM */
ret = usb_control_msg_recv(atusb->usb_dev, 0 , ATUSB_EUI64_READ, ATUSB_REQ_FROM_DEV, 0 , 0 ,
buffer, IEEE802154_EXTENDED_ADDR_LEN, 1000 , GFP_KERNEL);
if (ret < 0 ) {
dev_err(&usb_dev->dev, "failed to fetch extended address, random address set\n" );
ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
return ret;
}
memcpy(&extended_addr, buffer, IEEE802154_EXTENDED_ADDR_LEN);
/* Check if read address is not empty and the unicast bit is set correctly */
if (!ieee802154_is_valid_extended_unicast_addr(extended_addr)) {
dev_info(&usb_dev->dev, "no permanent extended address found, random address set\n" );
ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
} else {
atusb->hw->phy->perm_extended_addr = extended_addr;
addr = swab64((__force u64)atusb->hw->phy->perm_extended_addr);
dev_info(&usb_dev->dev, "Read permanent extended address %8phC from device\n" ,
&addr);
}
return ret;
}
/* ----- Setup ------------------------------------------------------------- */
static int atusb_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
struct usb_device *usb_dev = interface_to_usbdev(interface);
struct ieee802154_hw *hw;
struct atusb *atusb = NULL;
int ret = -ENOMEM;
hw = ieee802154_alloc_hw(sizeof (struct atusb), &atusb_ops);
if (!hw)
return -ENOMEM;
atusb = hw->priv;
atusb->hw = hw;
atusb->usb_dev = usb_get_dev(usb_dev);
usb_set_intfdata(interface, atusb);
atusb->shutdown = 0 ;
atusb->err = 0 ;
INIT_DELAYED_WORK(&atusb->work, atusb_work_urbs);
init_usb_anchor(&atusb->idle_urbs);
init_usb_anchor(&atusb->rx_urbs);
if (atusb_alloc_urbs(atusb, ATUSB_NUM_RX_URBS))
goto fail;
atusb->tx_dr.bRequestType = ATUSB_REQ_TO_DEV;
atusb->tx_dr.bRequest = ATUSB_TX;
atusb->tx_dr.wValue = cpu_to_le16(0 );
atusb->tx_urb = usb_alloc_urb(0 , GFP_KERNEL);
if (!atusb->tx_urb)
goto fail;
hw->parent = &usb_dev->dev;
usb_control_msg_send(atusb->usb_dev, 0 , ATUSB_RF_RESET, ATUSB_REQ_TO_DEV, 0 , 0 ,
NULL, 0 , 1000 , GFP_KERNEL);
atusb_get_and_conf_chip(atusb);
atusb_get_and_show_revision(atusb);
atusb_get_and_show_build(atusb);
atusb_set_extended_addr(atusb);
if ((atusb->fw_ver_maj == 0 && atusb->fw_ver_min >= 3 ) || atusb->fw_ver_maj > 0 )
hw->flags |= IEEE802154_HW_FRAME_RETRIES;
ret = atusb_get_and_clear_error(atusb);
if (ret) {
dev_err(&atusb->usb_dev->dev,
"%s: initialization failed, error = %d\n" ,
__func__, ret);
goto fail;
}
ret = ieee802154_register_hw(hw);
if (ret)
goto fail;
/* If we just powered on, we're now in P_ON and need to enter TRX_OFF
* explicitly . Any resets after that will send us straight to TRX_OFF ,
* making the command below redundant .
*/
usb_control_msg_send(atusb->usb_dev, 0 , ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
STATE_FORCE_TRX_OFF, RG_TRX_STATE, NULL, 0 , 1000 , GFP_KERNEL);
msleep(1 ); /* reset => TRX_OFF, tTR13 = 37 us */
#if 0
/* Calculating the maximum time available to empty the frame buffer
* on reception :
*
* According to [ 1 ] , the inter - frame gap is
* R * 20 * 16 us + 128 us
* where R is a random number from 0 to 7 . Furthermore , we have 20 bit
* times ( 80 us at 250 kbps ) of SHR of the next frame before the
* transceiver begins storing data in the frame buffer .
*
* This yields a minimum time of 208 us between the last data of a
* frame and the first data of the next frame . This time is further
* reduced by interrupt latency in the atusb firmware .
*
* atusb currently needs about 500 us to retrieve a maximum - sized
* frame . We therefore have to allow reception of a new frame to begin
* while we retrieve the previous frame .
*
* [ 1 ] " JN - AN - 1035 Calculating data rates in an IEEE 802 . 15 . 4 - based
* network " , Jennic 2006 .
* http : //www.jennic.com/download_file.php?supportFile=JN-AN-1035%20Calculating%20802-15-4%20Data%20Rates-1v0.pdf
*/
atusb_write_subreg(atusb, SR_RX_SAFE_MODE, 1 );
#endif
usb_control_msg_send(atusb->usb_dev, 0 , ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
0 xff, RG_IRQ_MASK, NULL, 0 , 1000 , GFP_KERNEL);
ret = atusb_get_and_clear_error(atusb);
if (!ret)
return 0 ;
dev_err(&atusb->usb_dev->dev,
"%s: setup failed, error = %d\n" ,
__func__, ret);
ieee802154_unregister_hw(hw);
fail:
atusb_free_urbs(atusb);
usb_kill_urb(atusb->tx_urb);
usb_free_urb(atusb->tx_urb);
usb_put_dev(usb_dev);
ieee802154_free_hw(hw);
return ret;
}
static void atusb_disconnect(struct usb_interface *interface)
{
struct atusb *atusb = usb_get_intfdata(interface);
dev_dbg(&atusb->usb_dev->dev, "%s\n" , __func__);
atusb->shutdown = 1 ;
cancel_delayed_work_sync(&atusb->work);
usb_kill_anchored_urbs(&atusb->rx_urbs);
atusb_free_urbs(atusb);
usb_kill_urb(atusb->tx_urb);
usb_free_urb(atusb->tx_urb);
ieee802154_unregister_hw(atusb->hw);
usb_put_dev(atusb->usb_dev);
ieee802154_free_hw(atusb->hw);
usb_set_intfdata(interface, NULL);
pr_debug("%s done\n" , __func__);
}
/* The devices we work with */
static const struct usb_device_id atusb_device_table[] = {
{
.match_flags = USB_DEVICE_ID_MATCH_DEVICE |
USB_DEVICE_ID_MATCH_INT_INFO,
.idVendor = ATUSB_VENDOR_ID,
.idProduct = ATUSB_PRODUCT_ID,
.bInterfaceClass = USB_CLASS_VENDOR_SPEC
},
/* end with null element */
{}
};
MODULE_DEVICE_TABLE(usb, atusb_device_table);
static struct usb_driver atusb_driver = {
.name = "atusb" ,
.probe = atusb_probe,
.disconnect = atusb_disconnect,
.id_table = atusb_device_table,
};
module_usb_driver(atusb_driver);
MODULE_AUTHOR("Alexander Aring <alex.aring@gmail.com>" );
MODULE_AUTHOR("Richard Sharpe <realrichardsharpe@gmail.com>" );
MODULE_AUTHOR("Stefan Schmidt <stefan@datenfreihafen.org>" );
MODULE_AUTHOR("Werner Almesberger <werner@almesberger.net>" );
MODULE_AUTHOR("Josef Filzmaier <j.filzmaier@gmx.at>" );
MODULE_DESCRIPTION("ATUSB IEEE 802.15.4 Driver" );
MODULE_LICENSE("GPL" );
Messung V0.5 in Prozent C=96 H=94 G=94
¤ Dauer der Verarbeitung: 0.23 Sekunden
(vorverarbeitet am 2026-10-01)
¤
*© Formatika GbR, Deutschland