![Alexander Aring](/assets/img/avatar_default.png)
This patch fixes the behaviour to not overwrite csma settings when set channel afterwards. Cc: Stefan Schmidt <stefan@osg.samsung.com> Acked-by: Stefan Schmidt <stefan@osg.samsung.com> Signed-off-by: Alexander Aring <aar@pengutronix.de> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
854 lines
22 KiB
C
854 lines
22 KiB
C
/*
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* atusb.c - Driver for the ATUSB IEEE 802.15.4 dongle
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*
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* Written 2013 by Werner Almesberger <werner@almesberger.net>
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*
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* Copyright (c) 2015 - 2016 Stefan Schmidt <stefan@datenfreihafen.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2
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*
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* Based on at86rf230.c and spi_atusb.c.
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* at86rf230.c is
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* Copyright (C) 2009 Siemens AG
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* Written by: Dmitry Eremin-Solenikov <dmitry.baryshkov@siemens.com>
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*
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* spi_atusb.c is
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* Copyright (c) 2011 Richard Sharpe <realrichardsharpe@gmail.com>
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* Copyright (c) 2011 Stefan Schmidt <stefan@datenfreihafen.org>
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* Copyright (c) 2011 Werner Almesberger <werner@almesberger.net>
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*
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* USB initialization is
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* Copyright (c) 2013 Alexander Aring <alex.aring@gmail.com>
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/jiffies.h>
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#include <linux/usb.h>
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#include <linux/skbuff.h>
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#include <net/cfg802154.h>
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#include <net/mac802154.h>
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#include "at86rf230.h"
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#include "atusb.h"
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#define ATUSB_JEDEC_ATMEL 0x1f /* JEDEC manufacturer ID */
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#define ATUSB_NUM_RX_URBS 4 /* allow for a bit of local latency */
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#define ATUSB_ALLOC_DELAY_MS 100 /* delay after failed allocation */
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#define ATUSB_TX_TIMEOUT_MS 200 /* on the air timeout */
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struct atusb {
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struct ieee802154_hw *hw;
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struct usb_device *usb_dev;
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int shutdown; /* non-zero if shutting down */
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int err; /* set by first error */
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/* RX variables */
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struct delayed_work work; /* memory allocations */
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struct usb_anchor idle_urbs; /* URBs waiting to be submitted */
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struct usb_anchor rx_urbs; /* URBs waiting for reception */
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/* TX variables */
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struct usb_ctrlrequest tx_dr;
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struct urb *tx_urb;
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struct sk_buff *tx_skb;
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uint8_t tx_ack_seq; /* current TX ACK sequence number */
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};
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/* ----- USB commands without data ----------------------------------------- */
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/* To reduce the number of error checks in the code, we record the first error
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* in atusb->err and reject all subsequent requests until the error is cleared.
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*/
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static int atusb_control_msg(struct atusb *atusb, unsigned int pipe,
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__u8 request, __u8 requesttype,
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__u16 value, __u16 index,
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void *data, __u16 size, int timeout)
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{
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struct usb_device *usb_dev = atusb->usb_dev;
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int ret;
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if (atusb->err)
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return atusb->err;
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ret = usb_control_msg(usb_dev, pipe, request, requesttype,
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value, index, data, size, timeout);
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if (ret < 0) {
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atusb->err = ret;
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dev_err(&usb_dev->dev,
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"atusb_control_msg: req 0x%02x val 0x%x idx 0x%x, error %d\n",
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request, value, index, ret);
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}
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return ret;
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}
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static int atusb_command(struct atusb *atusb, uint8_t cmd, uint8_t arg)
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{
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struct usb_device *usb_dev = atusb->usb_dev;
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dev_dbg(&usb_dev->dev, "atusb_command: cmd = 0x%x\n", cmd);
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return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0),
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cmd, ATUSB_REQ_TO_DEV, arg, 0, NULL, 0, 1000);
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}
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static int atusb_write_reg(struct atusb *atusb, uint8_t reg, uint8_t value)
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{
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struct usb_device *usb_dev = atusb->usb_dev;
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dev_dbg(&usb_dev->dev, "atusb_write_reg: 0x%02x <- 0x%02x\n",
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reg, value);
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return atusb_control_msg(atusb, usb_sndctrlpipe(usb_dev, 0),
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ATUSB_REG_WRITE, ATUSB_REQ_TO_DEV,
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value, reg, NULL, 0, 1000);
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}
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static int atusb_read_reg(struct atusb *atusb, uint8_t reg)
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{
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struct usb_device *usb_dev = atusb->usb_dev;
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int ret;
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uint8_t value;
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dev_dbg(&usb_dev->dev, "atusb: reg = 0x%x\n", reg);
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ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
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ATUSB_REG_READ, ATUSB_REQ_FROM_DEV,
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0, reg, &value, 1, 1000);
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return ret >= 0 ? value : ret;
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}
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static int atusb_write_subreg(struct atusb *atusb, uint8_t reg, uint8_t mask,
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uint8_t shift, uint8_t value)
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{
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struct usb_device *usb_dev = atusb->usb_dev;
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uint8_t orig, tmp;
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int ret = 0;
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dev_dbg(&usb_dev->dev, "atusb_write_subreg: 0x%02x <- 0x%02x\n",
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reg, value);
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orig = atusb_read_reg(atusb, reg);
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/* Write the value only into that part of the register which is allowed
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* by the mask. All other bits stay as before.
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*/
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tmp = orig & ~mask;
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tmp |= (value << shift) & mask;
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if (tmp != orig)
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ret = atusb_write_reg(atusb, reg, tmp);
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return ret;
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}
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static int atusb_get_and_clear_error(struct atusb *atusb)
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{
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int err = atusb->err;
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atusb->err = 0;
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return err;
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}
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/* ----- skb allocation ---------------------------------------------------- */
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#define MAX_PSDU 127
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#define MAX_RX_XFER (1 + MAX_PSDU + 2 + 1) /* PHR+PSDU+CRC+LQI */
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#define SKB_ATUSB(skb) (*(struct atusb **)(skb)->cb)
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static void atusb_in(struct urb *urb);
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static int atusb_submit_rx_urb(struct atusb *atusb, struct urb *urb)
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{
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struct usb_device *usb_dev = atusb->usb_dev;
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struct sk_buff *skb = urb->context;
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int ret;
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if (!skb) {
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skb = alloc_skb(MAX_RX_XFER, GFP_KERNEL);
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if (!skb) {
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dev_warn_ratelimited(&usb_dev->dev,
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"atusb_in: can't allocate skb\n");
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return -ENOMEM;
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}
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skb_put(skb, MAX_RX_XFER);
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SKB_ATUSB(skb) = atusb;
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}
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usb_fill_bulk_urb(urb, usb_dev, usb_rcvbulkpipe(usb_dev, 1),
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skb->data, MAX_RX_XFER, atusb_in, skb);
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usb_anchor_urb(urb, &atusb->rx_urbs);
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ret = usb_submit_urb(urb, GFP_KERNEL);
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if (ret) {
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usb_unanchor_urb(urb);
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kfree_skb(skb);
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urb->context = NULL;
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}
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return ret;
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}
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static void atusb_work_urbs(struct work_struct *work)
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{
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struct atusb *atusb =
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container_of(to_delayed_work(work), struct atusb, work);
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struct usb_device *usb_dev = atusb->usb_dev;
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struct urb *urb;
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int ret;
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if (atusb->shutdown)
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return;
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do {
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urb = usb_get_from_anchor(&atusb->idle_urbs);
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if (!urb)
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return;
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ret = atusb_submit_rx_urb(atusb, urb);
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} while (!ret);
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usb_anchor_urb(urb, &atusb->idle_urbs);
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dev_warn_ratelimited(&usb_dev->dev,
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"atusb_in: can't allocate/submit URB (%d)\n", ret);
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schedule_delayed_work(&atusb->work,
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msecs_to_jiffies(ATUSB_ALLOC_DELAY_MS) + 1);
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}
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/* ----- Asynchronous USB -------------------------------------------------- */
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static void atusb_tx_done(struct atusb *atusb, uint8_t seq)
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{
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struct usb_device *usb_dev = atusb->usb_dev;
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uint8_t expect = atusb->tx_ack_seq;
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dev_dbg(&usb_dev->dev, "atusb_tx_done (0x%02x/0x%02x)\n", seq, expect);
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if (seq == expect) {
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/* TODO check for ifs handling in firmware */
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ieee802154_xmit_complete(atusb->hw, atusb->tx_skb, false);
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} else {
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/* TODO I experience this case when atusb has a tx complete
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* irq before probing, we should fix the firmware it's an
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* unlikely case now that seq == expect is then true, but can
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* happen and fail with a tx_skb = NULL;
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*/
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ieee802154_wake_queue(atusb->hw);
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if (atusb->tx_skb)
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dev_kfree_skb_irq(atusb->tx_skb);
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}
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}
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static void atusb_in_good(struct urb *urb)
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{
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struct usb_device *usb_dev = urb->dev;
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struct sk_buff *skb = urb->context;
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struct atusb *atusb = SKB_ATUSB(skb);
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uint8_t len, lqi;
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if (!urb->actual_length) {
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dev_dbg(&usb_dev->dev, "atusb_in: zero-sized URB ?\n");
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return;
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}
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len = *skb->data;
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if (urb->actual_length == 1) {
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atusb_tx_done(atusb, len);
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return;
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}
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if (len + 1 > urb->actual_length - 1) {
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dev_dbg(&usb_dev->dev, "atusb_in: frame len %d+1 > URB %u-1\n",
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len, urb->actual_length);
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return;
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}
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if (!ieee802154_is_valid_psdu_len(len)) {
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dev_dbg(&usb_dev->dev, "atusb_in: frame corrupted\n");
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return;
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}
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lqi = skb->data[len + 1];
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dev_dbg(&usb_dev->dev, "atusb_in: rx len %d lqi 0x%02x\n", len, lqi);
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skb_pull(skb, 1); /* remove PHR */
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skb_trim(skb, len); /* get payload only */
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ieee802154_rx_irqsafe(atusb->hw, skb, lqi);
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urb->context = NULL; /* skb is gone */
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}
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static void atusb_in(struct urb *urb)
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{
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struct usb_device *usb_dev = urb->dev;
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struct sk_buff *skb = urb->context;
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struct atusb *atusb = SKB_ATUSB(skb);
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dev_dbg(&usb_dev->dev, "atusb_in: status %d len %d\n",
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urb->status, urb->actual_length);
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if (urb->status) {
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if (urb->status == -ENOENT) { /* being killed */
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kfree_skb(skb);
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urb->context = NULL;
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return;
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}
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dev_dbg(&usb_dev->dev, "atusb_in: URB error %d\n", urb->status);
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} else {
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atusb_in_good(urb);
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}
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usb_anchor_urb(urb, &atusb->idle_urbs);
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if (!atusb->shutdown)
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schedule_delayed_work(&atusb->work, 0);
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}
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/* ----- URB allocation/deallocation --------------------------------------- */
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static void atusb_free_urbs(struct atusb *atusb)
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{
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struct urb *urb;
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while (1) {
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urb = usb_get_from_anchor(&atusb->idle_urbs);
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if (!urb)
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break;
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kfree_skb(urb->context);
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usb_free_urb(urb);
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}
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}
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static int atusb_alloc_urbs(struct atusb *atusb, int n)
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{
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struct urb *urb;
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while (n) {
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urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!urb) {
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atusb_free_urbs(atusb);
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return -ENOMEM;
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}
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usb_anchor_urb(urb, &atusb->idle_urbs);
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n--;
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}
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return 0;
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}
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/* ----- IEEE 802.15.4 interface operations -------------------------------- */
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static void atusb_xmit_complete(struct urb *urb)
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{
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dev_dbg(&urb->dev->dev, "atusb_xmit urb completed");
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}
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static int atusb_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
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{
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struct atusb *atusb = hw->priv;
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struct usb_device *usb_dev = atusb->usb_dev;
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int ret;
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dev_dbg(&usb_dev->dev, "atusb_xmit (%d)\n", skb->len);
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atusb->tx_skb = skb;
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atusb->tx_ack_seq++;
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atusb->tx_dr.wIndex = cpu_to_le16(atusb->tx_ack_seq);
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atusb->tx_dr.wLength = cpu_to_le16(skb->len);
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usb_fill_control_urb(atusb->tx_urb, usb_dev,
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usb_sndctrlpipe(usb_dev, 0),
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(unsigned char *)&atusb->tx_dr, skb->data,
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skb->len, atusb_xmit_complete, NULL);
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ret = usb_submit_urb(atusb->tx_urb, GFP_ATOMIC);
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dev_dbg(&usb_dev->dev, "atusb_xmit done (%d)\n", ret);
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return ret;
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}
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static int atusb_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
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{
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struct atusb *atusb = hw->priv;
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int ret;
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ret = atusb_write_subreg(atusb, SR_CHANNEL, channel);
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if (ret < 0)
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return ret;
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msleep(1); /* @@@ ugly synchronization */
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return 0;
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}
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static int atusb_ed(struct ieee802154_hw *hw, u8 *level)
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{
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BUG_ON(!level);
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*level = 0xbe;
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return 0;
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}
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static int atusb_set_hw_addr_filt(struct ieee802154_hw *hw,
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struct ieee802154_hw_addr_filt *filt,
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unsigned long changed)
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{
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struct atusb *atusb = hw->priv;
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struct device *dev = &atusb->usb_dev->dev;
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if (changed & IEEE802154_AFILT_SADDR_CHANGED) {
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u16 addr = le16_to_cpu(filt->short_addr);
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dev_vdbg(dev, "atusb_set_hw_addr_filt called for saddr\n");
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atusb_write_reg(atusb, RG_SHORT_ADDR_0, addr);
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atusb_write_reg(atusb, RG_SHORT_ADDR_1, addr >> 8);
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}
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if (changed & IEEE802154_AFILT_PANID_CHANGED) {
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u16 pan = le16_to_cpu(filt->pan_id);
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dev_vdbg(dev, "atusb_set_hw_addr_filt called for pan id\n");
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atusb_write_reg(atusb, RG_PAN_ID_0, pan);
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atusb_write_reg(atusb, RG_PAN_ID_1, pan >> 8);
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}
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if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) {
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u8 i, addr[IEEE802154_EXTENDED_ADDR_LEN];
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memcpy(addr, &filt->ieee_addr, IEEE802154_EXTENDED_ADDR_LEN);
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dev_vdbg(dev, "atusb_set_hw_addr_filt called for IEEE addr\n");
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for (i = 0; i < 8; i++)
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atusb_write_reg(atusb, RG_IEEE_ADDR_0 + i, addr[i]);
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}
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if (changed & IEEE802154_AFILT_PANC_CHANGED) {
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dev_vdbg(dev,
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"atusb_set_hw_addr_filt called for panc change\n");
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if (filt->pan_coord)
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atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 1);
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else
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atusb_write_subreg(atusb, SR_AACK_I_AM_COORD, 0);
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}
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return atusb_get_and_clear_error(atusb);
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}
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static int atusb_start(struct ieee802154_hw *hw)
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{
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struct atusb *atusb = hw->priv;
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struct usb_device *usb_dev = atusb->usb_dev;
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int ret;
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dev_dbg(&usb_dev->dev, "atusb_start\n");
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schedule_delayed_work(&atusb->work, 0);
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atusb_command(atusb, ATUSB_RX_MODE, 1);
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ret = atusb_get_and_clear_error(atusb);
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if (ret < 0)
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usb_kill_anchored_urbs(&atusb->idle_urbs);
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return ret;
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}
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static void atusb_stop(struct ieee802154_hw *hw)
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{
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struct atusb *atusb = hw->priv;
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struct usb_device *usb_dev = atusb->usb_dev;
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dev_dbg(&usb_dev->dev, "atusb_stop\n");
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usb_kill_anchored_urbs(&atusb->idle_urbs);
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atusb_command(atusb, ATUSB_RX_MODE, 0);
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atusb_get_and_clear_error(atusb);
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}
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#define ATUSB_MAX_TX_POWERS 0xF
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static const s32 atusb_powers[ATUSB_MAX_TX_POWERS + 1] = {
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300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700,
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-900, -1200, -1700,
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};
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static int
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atusb_set_txpower(struct ieee802154_hw *hw, s32 mbm)
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{
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struct atusb *atusb = hw->priv;
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u32 i;
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for (i = 0; i < hw->phy->supported.tx_powers_size; i++) {
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if (hw->phy->supported.tx_powers[i] == mbm)
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return atusb_write_subreg(atusb, SR_TX_PWR_23X, i);
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}
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return -EINVAL;
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}
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#define ATUSB_MAX_ED_LEVELS 0xF
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static const s32 atusb_ed_levels[ATUSB_MAX_ED_LEVELS + 1] = {
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-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_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 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_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)
|
|
dev_info(&usb_dev->dev,
|
|
"Firmware: major: %u, minor: %u, hardware type: %u\n",
|
|
buffer[0], buffer[1], buffer[2]);
|
|
if (buffer[0] == 0 && buffer[1] < 2) {
|
|
dev_info(&usb_dev->dev,
|
|
"Firmware version (%u.%u) is predates our first public release.",
|
|
buffer[0], buffer[1]);
|
|
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;
|
|
}
|
|
|
|
/* ----- 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;
|
|
|
|
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];
|
|
ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
|
|
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);
|
|
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");
|