| /* |
| * 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> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation, version 2 |
| * |
| * 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> |
| */ |
| |
| #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 0x1f /* 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; |
| 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; |
| uint8_t 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 */ |
| }; |
| |
| /* ----- USB commands without data ----------------------------------------- */ |
| |
| /* To reduce the number of error checks in the code, we record the first error |
| * in atusb->err and reject all subsequent requests until the error is cleared. |
| */ |
| |
| static int atusb_control_msg(struct atusb *atusb, unsigned int pipe, |
| __u8 request, __u8 requesttype, |
| __u16 value, __u16 index, |
| void *data, __u16 size, int timeout) |
| { |
| struct usb_device *usb_dev = atusb->usb_dev; |
| int ret; |
| |
| if (atusb->err) |
| return atusb->err; |
| |
| ret = usb_control_msg(usb_dev, pipe, request, requesttype, |
| value, index, data, size, timeout); |
| if (ret < 0) { |
| atusb->err = ret; |
| dev_err(&usb_dev->dev, |
| "atusb_control_msg: req 0x%02x val 0x%x idx 0x%x, error %d\n", |
| request, value, index, ret); |
| } |
| return ret; |
| } |
| |
| static int atusb_command(struct atusb *atusb, uint8_t cmd, uint8_t arg) |
| { |
| struct usb_device *usb_dev = atusb->usb_dev; |
| |
| dev_dbg(&usb_dev->dev, "atusb_command: cmd = 0x%x\n", cmd); |
| return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0), |
| cmd, ATUSB_REQ_TO_DEV, arg, 0, NULL, 0, 1000); |
| } |
| |
| static int atusb_write_reg(struct atusb *atusb, uint8_t reg, uint8_t value) |
| { |
| struct usb_device *usb_dev = atusb->usb_dev; |
| |
| dev_dbg(&usb_dev->dev, "atusb_write_reg: 0x%02x <- 0x%02x\n", |
| reg, value); |
| return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0), |
| ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV, |
| value, reg, NULL, 0, 1000); |
| } |
| |
| static int atusb_read_reg(struct atusb *atusb, uint8_t reg) |
| { |
| struct usb_device *usb_dev = atusb->usb_dev; |
| int ret; |
| uint8_t value; |
| |
| dev_dbg(&usb_dev->dev, "atusb: reg = 0x%x\n", reg); |
| ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0), |
| ATUSB_REG_READ, ATUSB_REQ_FROM_DEV, |
| 0, reg, &value, 1, 1000); |
| return ret >= 0 ? value : ret; |
| } |
| |
| static int atusb_write_subreg(struct atusb *atusb, uint8_t reg, uint8_t mask, |
| uint8_t shift, uint8_t value) |
| { |
| struct usb_device *usb_dev = atusb->usb_dev; |
| uint8_t orig, tmp; |
| int ret = 0; |
| |
| dev_dbg(&usb_dev->dev, "atusb_write_subreg: 0x%02x <- 0x%02x\n", |
| reg, value); |
| |
| orig = atusb_read_reg(atusb, reg); |
| |
| /* 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 = atusb_write_reg(atusb, reg, tmp); |
| |
| return ret; |
| } |
| |
| 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, uint8_t seq) |
| { |
| struct usb_device *usb_dev = atusb->usb_dev; |
| uint8_t expect = atusb->tx_ack_seq; |
| |
| dev_dbg(&usb_dev->dev, "atusb_tx_done (0x%02x/0x%02x)\n", seq, expect); |
| if (seq == expect) { |
| /* TODO check for ifs handling in firmware */ |
| ieee802154_xmit_complete(atusb->hw, atusb->tx_skb, false); |
| } 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_wake_queue(atusb->hw); |
| if (atusb->tx_skb) |
| dev_kfree_skb_irq(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); |
| uint8_t len, lqi; |
| |
| if (!urb->actual_length) { |
| dev_dbg(&usb_dev->dev, "atusb_in: zero-sized URB ?\n"); |
| return; |
| } |
| |
| len = *skb->data; |
| |
| if (urb->actual_length == 1) { |
| atusb_tx_done(atusb, len); |
| 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, "atusb_in: status %d len %d\n", |
| 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, "atusb_in: URB error %d\n", 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); |
| 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, "atusb_xmit (%d)\n", 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, "atusb_xmit done (%d)\n", ret); |
| return ret; |
| } |
| |
| static int atusb_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; |
| msleep(1); /* @@@ ugly synchronization */ |
| return 0; |
| } |
| |
| static int atusb_ed(struct ieee802154_hw *hw, u8 *level) |
| { |
| BUG_ON(!level); |
| *level = 0xbe; |
| 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, "atusb_set_hw_addr_filt called for saddr\n"); |
| atusb_write_reg(atusb, RG_SHORT_ADDR_0, addr); |
| atusb_write_reg(atusb, RG_SHORT_ADDR_1, addr >> 8); |
| } |
| |
| if (changed & IEEE802154_AFILT_PANID_CHANGED) { |
| u16 pan = le16_to_cpu(filt->pan_id); |
| |
| dev_vdbg(dev, "atusb_set_hw_addr_filt called for pan id\n"); |
| atusb_write_reg(atusb, RG_PAN_ID_0, pan); |
| atusb_write_reg(atusb, RG_PAN_ID_1, pan >> 8); |
| } |
| |
| 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, "atusb_set_hw_addr_filt called for IEEE addr\n"); |
| for (i = 0; i < 8; i++) |
| atusb_write_reg(atusb, RG_IEEE_ADDR_0 + i, addr[i]); |
| } |
| |
| if (changed & IEEE802154_AFILT_PANC_CHANGED) { |
| dev_vdbg(dev, |
| "atusb_set_hw_addr_filt called for panc change\n"); |
| 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, "atusb_start\n"); |
| schedule_delayed_work(&atusb->work, 0); |
| atusb_command(atusb, ATUSB_RX_MODE, 1); |
| 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, "atusb_stop\n"); |
| usb_kill_anchored_urbs(&atusb->idle_urbs); |
| atusb_command(atusb, ATUSB_RX_MODE, 0); |
| atusb_get_and_clear_error(atusb); |
| } |
| |
| #define ATUSB_MAX_TX_POWERS 0xF |
| 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_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; |
| } |
| |
| #define ATUSB_MAX_ED_LEVELS 0xF |
| 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, |
| }; |
| |
| 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 |
| 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_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 |
| atusb_set_frame_retries(struct ieee802154_hw *hw, s8 retries) |
| { |
| struct atusb *atusb = hw->priv; |
| struct device *dev = &atusb->usb_dev->dev; |
| |
| if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 3) { |
| dev_info(dev, "Automatic frame retransmission is only available from " |
| "firmware version 0.3. Please update if you want this feature."); |
| return -EINVAL; |
| } |
| |
| 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 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_set_txpower, |
| .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; |
| unsigned char buffer[3]; |
| int ret; |
| |
| /* Get a couple of the ATMega Firmware values */ |
| ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0), |
| ATUSB_ID, ATUSB_REQ_FROM_DEV, 0, 0, |
| buffer, 3, 1000); |
| if (ret >= 0) { |
| atusb->fw_ver_maj = buffer[0]; |
| atusb->fw_ver_min = buffer[1]; |
| atusb->fw_hw_type = buffer[2]; |
| |
| dev_info(&usb_dev->dev, |
| "Firmware: major: %u, minor: %u, hardware type: %u\n", |
| atusb->fw_ver_maj, atusb->fw_ver_min, 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[ATUSB_BUILD_SIZE + 1]; |
| int ret; |
| |
| ret = atusb_control_msg(atusb, 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); |
| } |
| |
| return ret; |
| } |
| |
| static int atusb_get_and_show_chip(struct atusb *atusb) |
| { |
| struct usb_device *usb_dev = atusb->usb_dev; |
| uint8_t man_id_0, man_id_1, part_num, version_num; |
| const char *chip; |
| |
| man_id_0 = atusb_read_reg(atusb, RG_MAN_ID_0); |
| man_id_1 = atusb_read_reg(atusb, RG_MAN_ID_1); |
| part_num = atusb_read_reg(atusb, RG_PART_NUM); |
| version_num = atusb_read_reg(atusb, RG_VERSION_NUM); |
| |
| if (atusb->err) |
| return atusb->err; |
| |
| 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"; |
| break; |
| case 3: |
| chip = "AT86RF231"; |
| break; |
| default: |
| dev_err(&usb_dev->dev, |
| "unexpected transceiver, part 0x%02x version 0x%02x\n", |
| part_num, version_num); |
| goto fail; |
| } |
| |
| 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 = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0), |
| ATUSB_EUI64_READ, ATUSB_REQ_FROM_DEV, 0, 0, |
| buffer, IEEE802154_EXTENDED_ADDR_LEN, 1000); |
| if (ret < 0) |
| dev_err(&usb_dev->dev, "failed to fetch extended address\n"); |
| |
| 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_ATOMIC); |
| if (!atusb->tx_urb) |
| goto fail; |
| |
| hw->parent = &usb_dev->dev; |
| hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT | |
| IEEE802154_HW_PROMISCUOUS | IEEE802154_HW_CSMA_PARAMS | |
| IEEE802154_HW_FRAME_RETRIES; |
| |
| 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->supported.cca_ed_levels = atusb_ed_levels; |
| hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(atusb_ed_levels); |
| |
| hw->phy->cca.mode = NL802154_CCA_ENERGY; |
| |
| hw->phy->current_page = 0; |
| hw->phy->current_channel = 11; /* reset default */ |
| hw->phy->supported.channels[0] = 0x7FFF800; |
| hw->phy->supported.tx_powers = atusb_powers; |
| hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers); |
| hw->phy->transmit_power = hw->phy->supported.tx_powers[0]; |
| hw->phy->cca_ed_level = hw->phy->supported.cca_ed_levels[7]; |
| |
| atusb_command(atusb, ATUSB_RF_RESET, 0); |
| atusb_get_and_show_chip(atusb); |
| atusb_get_and_show_revision(atusb); |
| atusb_get_and_show_build(atusb); |
| atusb_set_extended_addr(atusb); |
| |
| 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. |
| */ |
| atusb_write_reg(atusb, RG_TRX_STATE, STATE_FORCE_TRX_OFF); |
| 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 |
| atusb_write_reg(atusb, RG_IRQ_MASK, 0xff); |
| |
| 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, "atusb_disconnect\n"); |
| |
| 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); |
| |
| ieee802154_free_hw(atusb->hw); |
| |
| usb_set_intfdata(interface, NULL); |
| usb_put_dev(atusb->usb_dev); |
| |
| pr_debug("atusb_disconnect done\n"); |
| } |
| |
| /* 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_DESCRIPTION("ATUSB IEEE 802.15.4 Driver"); |
| MODULE_LICENSE("GPL"); |