1 /*****************************************************************************
5 * Description: Irda MosChip USB Dongle Driver
6 * Authors: Lukasz Stelmach <stlman@poczta.fm>
7 * Brian Pugh <bpugh@cs.pdx.edu>
8 * Judy Fischbach <jfisch@cs.pdx.edu>
10 * Based on stir4200 driver, but some things done differently.
11 * Based on earlier driver by Paul Stewart <stewart@parc.com>
13 * Copyright (C) 2000, Roman Weissgaerber <weissg@vienna.at>
14 * Copyright (C) 2001, Dag Brattli <dag@brattli.net>
15 * Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com>
16 * Copyright (C) 2004, Stephen Hemminger <shemminger@osdl.org>
17 * Copyright (C) 2005, Lukasz Stelmach <stlman@poczta.fm>
18 * Copyright (C) 2005, Brian Pugh <bpugh@cs.pdx.edu>
19 * Copyright (C) 2005, Judy Fischbach <jfisch@cs.pdx.edu>
21 * This program is free software; you can redistribute it and/or modify
22 * it under the terms of the GNU General Public License as published by
23 * the Free Software Foundation; either version 2 of the License, or
24 * (at your option) any later version.
26 * This program is distributed in the hope that it will be useful,
27 * but WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 * GNU General Public License for more details.
31 * You should have received a copy of the GNU General Public License
32 * along with this program; if not, write to the Free Software
33 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
35 *****************************************************************************/
38 * MCS7780 is a simple USB to IrDA bridge by MosChip. It is neither
39 * compatibile with irda-usb nor with stir4200. Although it is quite
40 * similar to the later as far as general idea of operation is concerned.
41 * That is it requires the software to do all the framing job at SIR speeds.
42 * The hardware does take care of the framing at MIR and FIR speeds.
43 * It supports all speeds from 2400 through 4Mbps
46 #include <linux/module.h>
47 #include <linux/moduleparam.h>
48 #include <linux/kernel.h>
49 #include <linux/types.h>
50 #include <linux/errno.h>
51 #include <linux/init.h>
52 #include <linux/slab.h>
53 #include <linux/module.h>
54 #include <linux/kref.h>
55 #include <linux/usb.h>
56 #include <linux/device.h>
57 #include <linux/crc32.h>
59 #include <asm/unaligned.h>
60 #include <asm/byteorder.h>
61 #include <asm/uaccess.h>
63 #include <net/irda/irda.h>
64 #include <net/irda/wrapper.h>
65 #include <net/irda/crc.h>
69 #define MCS_VENDOR_ID 0x9710
70 #define MCS_PRODUCT_ID 0x7780
72 static struct usb_device_id mcs_table[] = {
73 /* MosChip Corp., MCS7780 FIR-USB Adapter */
74 {USB_DEVICE(MCS_VENDOR_ID, MCS_PRODUCT_ID)},
78 MODULE_AUTHOR("Brian Pugh <bpugh@cs.pdx.edu>");
79 MODULE_DESCRIPTION("IrDA-USB Dongle Driver for MosChip MCS7780");
80 MODULE_VERSION("0.3alpha");
81 MODULE_LICENSE("GPL");
83 MODULE_DEVICE_TABLE(usb, mcs_table);
85 static int qos_mtt_bits = 0x07 /* > 1ms */ ;
86 module_param(qos_mtt_bits, int, 0);
87 MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
89 static int receive_mode = 0x1;
90 module_param(receive_mode, int, 0);
91 MODULE_PARM_DESC(receive_mode,
92 "Receive mode of the device (1:fast, 0:slow, default:1)");
94 static int sir_tweak = 1;
95 module_param(sir_tweak, int, 0444);
96 MODULE_PARM_DESC(sir_tweak,
97 "Default pulse width (1:1.6us, 0:3/16 bit, default:1).");
99 static int transceiver_type = MCS_TSC_VISHAY;
100 module_param(transceiver_type, int, 0444);
101 MODULE_PARM_DESC(transceiver_type, "IR transceiver type, see mcs7780.h.");
103 static struct usb_driver mcs_driver = {
106 .disconnect = mcs_disconnect,
107 .id_table = mcs_table,
110 /* speed flag selection by direct addressing.
111 addr = (speed >> 8) & 0x0f
113 0x1 57600 0x2 115200 0x4 1152000 0x5 9600
114 0x6 38400 0x9 2400 0xa 576000 0xb 19200
116 4Mbps (or 2400) must be checked separately. Since it also has
117 to be programmed in a different manner that is not a big problem.
119 static __u16 mcs_speed_set[16] = { 0,
133 /* Set given 16 bit register with a 16 bit value. Send control message
134 * to set dongle register. */
135 static int mcs_set_reg(struct mcs_cb *mcs, __u16 reg, __u16 val)
137 struct usb_device *dev = mcs->usbdev;
138 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
139 MCS_WR_RTYPE, val, reg, NULL, 0,
140 msecs_to_jiffies(MCS_CTRL_TIMEOUT));
143 /* Get 16 bit register value. Send contol message to read dongle register. */
144 static int mcs_get_reg(struct mcs_cb *mcs, __u16 reg, __u16 * val)
146 struct usb_device *dev = mcs->usbdev;
147 int ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
148 MCS_RD_RTYPE, 0, reg, val, 2,
149 msecs_to_jiffies(MCS_CTRL_TIMEOUT));
154 /* Setup a communication between mcs7780 and TFDU chips. It is described
155 * in more detail in the data sheet. The setup sequence puts the the
156 * vishay tranceiver into high speed mode. It will also receive SIR speed
157 * packets but at reduced sensitivity.
161 static inline int mcs_setup_transceiver_vishay(struct mcs_cb *mcs)
166 /* mcs_get_reg should read exactly two bytes from the dongle */
167 ret = mcs_get_reg(mcs, MCS_XCVR_REG, &rval);
168 if (unlikely(ret != 2)) {
173 /* The MCS_XCVR_CONF bit puts the transceiver into configuration
174 * mode. The MCS_MODE0 bit must start out high (1) and then
175 * transition to low and the MCS_STFIR and MCS_MODE1 bits must
178 rval |= (MCS_MODE0 | MCS_XCVR_CONF);
181 ret = mcs_set_reg(mcs, MCS_XCVR_REG, rval);
186 ret = mcs_set_reg(mcs, MCS_XCVR_REG, rval);
190 rval &= ~MCS_XCVR_CONF;
191 ret = mcs_set_reg(mcs, MCS_XCVR_REG, rval);
200 /* Setup a communication between mcs7780 and agilent chip. */
201 static inline int mcs_setup_transceiver_agilent(struct mcs_cb *mcs)
203 IRDA_WARNING("This transceiver type is not supported yet.\n");
207 /* Setup a communication between mcs7780 and sharp chip. */
208 static inline int mcs_setup_transceiver_sharp(struct mcs_cb *mcs)
210 IRDA_WARNING("This transceiver type is not supported yet.\n");
214 /* Common setup for all transceivers */
215 static inline int mcs_setup_transceiver(struct mcs_cb *mcs)
221 msg = "Basic transceiver setup error.";
223 /* read value of MODE Register, set the DRIVER and RESET bits
224 * and write value back out to MODE Register
226 ret = mcs_get_reg(mcs, MCS_MODE_REG, &rval);
227 if(unlikely(ret != 2))
229 rval |= MCS_DRIVER; /* put the mcs7780 into configuration mode. */
230 ret = mcs_set_reg(mcs, MCS_MODE_REG, rval);
234 rval = 0; /* set min pulse width to 0 initially. */
235 ret = mcs_set_reg(mcs, MCS_MINRXPW_REG, rval);
239 ret = mcs_get_reg(mcs, MCS_MODE_REG, &rval);
240 if(unlikely(ret != 2))
243 rval &= ~MCS_FIR; /* turn off fir mode. */
245 rval |= MCS_SIR16US; /* 1.6us pulse width */
247 rval &= ~MCS_SIR16US; /* 3/16 bit time pulse width */
249 /* make sure ask mode and back to back packets are off. */
250 rval &= ~(MCS_BBTG | MCS_ASK);
252 rval &= ~MCS_SPEED_MASK;
253 rval |= MCS_SPEED_9600; /* make sure initial speed is 9600. */
255 mcs->new_speed = 0; /* new_speed is set to 0 */
256 rval &= ~MCS_PLLPWDN; /* disable power down. */
258 /* make sure device determines direction and that the auto send sip
261 rval |= MCS_DTD | MCS_SIPEN;
263 ret = mcs_set_reg(mcs, MCS_MODE_REG, rval);
267 msg = "transceiver model specific setup error.";
268 switch (mcs->transceiver_type) {
270 ret = mcs_setup_transceiver_vishay(mcs);
274 ret = mcs_setup_transceiver_sharp(mcs);
277 case MCS_TSC_AGILENT:
278 ret = mcs_setup_transceiver_agilent(mcs);
282 IRDA_WARNING("Unknown transceiver type: %d\n",
283 mcs->transceiver_type);
289 /* If transceiver is not SHARP, then if receive mode set
290 * on the RXFAST bit in the XCVR Register otherwise unset it
292 if (mcs->transceiver_type != MCS_TSC_SHARP) {
294 ret = mcs_get_reg(mcs, MCS_XCVR_REG, &rval);
295 if (unlikely(ret != 2))
297 if (mcs->receive_mode)
301 ret = mcs_set_reg(mcs, MCS_XCVR_REG, rval);
306 msg = "transceiver reset.";
308 ret = mcs_get_reg(mcs, MCS_MODE_REG, &rval);
309 if (unlikely(ret != 2))
312 /* reset the mcs7780 so all changes take effect. */
314 ret = mcs_set_reg(mcs, MCS_MODE_REG, rval);
321 IRDA_ERROR("%s\n", msg);
325 /* Wraps the data in format for SIR */
326 static inline int mcs_wrap_sir_skb(struct sk_buff *skb, __u8 * buf)
330 /* 2: full frame length, including "the length" */
331 wraplen = async_wrap_skb(skb, buf + 2, 4094);
334 buf[0] = wraplen & 0xff;
335 buf[1] = (wraplen >> 8) & 0xff;
340 /* Wraps the data in format for FIR */
341 static unsigned mcs_wrap_fir_skb(const struct sk_buff *skb, __u8 *buf)
343 unsigned int len = 0;
344 __u32 fcs = ~(crc32_le(~0, skb->data, skb->len));
346 /* add 2 bytes for length value and 4 bytes for fcs. */
349 /* The mcs7780 requires that the first two bytes are the packet
350 * length in little endian order. Note: the length value includes
351 * the two bytes for the length value itself.
354 buf[1] = (len >> 8) & 0xff;
355 /* copy the data into the tx buffer. */
356 skb_copy_from_linear_data(skb, buf + 2, skb->len);
357 /* put the fcs in the last four bytes in little endian order. */
358 buf[len - 4] = fcs & 0xff;
359 buf[len - 3] = (fcs >> 8) & 0xff;
360 buf[len - 2] = (fcs >> 16) & 0xff;
361 buf[len - 1] = (fcs >> 24) & 0xff;
366 /* Wraps the data in format for MIR */
367 static unsigned mcs_wrap_mir_skb(const struct sk_buff *skb, __u8 *buf)
370 int len = skb->len + 4;
372 fcs = ~(irda_calc_crc16(~fcs, skb->data, skb->len));
373 /* put the total packet length in first. Note: packet length
374 * value includes the two bytes that hold the packet length
378 buf[1] = (len >> 8) & 0xff;
380 skb_copy_from_linear_data(skb, buf + 2, skb->len);
381 /* put the fcs in last two bytes in little endian order. */
382 buf[len - 2] = fcs & 0xff;
383 buf[len - 1] = (fcs >> 8) & 0xff;
388 /* Unwrap received packets at MIR speed. A 16 bit crc_ccitt checksum is
389 * used for the fcs. When performed over the entire packet the result
390 * should be GOOD_FCS = 0xf0b8. Hands the unwrapped data off to the IrDA
391 * layer via a sk_buff.
393 static void mcs_unwrap_mir(struct mcs_cb *mcs, __u8 *buf, int len)
399 /* Assume that the frames are going to fill a single packet
400 * rather than span multiple packets.
404 if(unlikely(new_len <= 0)) {
405 IRDA_ERROR("%s short frame length %d\n",
406 mcs->netdev->name, new_len);
407 ++mcs->stats.rx_errors;
408 ++mcs->stats.rx_length_errors;
412 fcs = irda_calc_crc16(~fcs, buf, len);
414 if(fcs != GOOD_FCS) {
415 IRDA_ERROR("crc error calc 0x%x len %d\n",
417 mcs->stats.rx_errors++;
418 mcs->stats.rx_crc_errors++;
422 skb = dev_alloc_skb(new_len + 1);
424 ++mcs->stats.rx_dropped;
429 skb_copy_to_linear_data(skb, buf, new_len);
430 skb_put(skb, new_len);
431 skb_reset_mac_header(skb);
432 skb->protocol = htons(ETH_P_IRDA);
433 skb->dev = mcs->netdev;
437 mcs->stats.rx_packets++;
438 mcs->stats.rx_bytes += new_len;
443 /* Unwrap received packets at FIR speed. A 32 bit crc_ccitt checksum is
444 * used for the fcs. Hands the unwrapped data off to the IrDA
445 * layer via a sk_buff.
447 static void mcs_unwrap_fir(struct mcs_cb *mcs, __u8 *buf, int len)
453 /* Assume that the frames are going to fill a single packet
454 * rather than span multiple packets. This is most likely a false
459 if(unlikely(new_len <= 0)) {
460 IRDA_ERROR("%s short frame length %d\n",
461 mcs->netdev->name, new_len);
462 ++mcs->stats.rx_errors;
463 ++mcs->stats.rx_length_errors;
467 fcs = ~(crc32_le(~0, buf, new_len));
468 if(fcs != le32_to_cpu(get_unaligned((u32 *)(buf+new_len)))) {
469 IRDA_ERROR("crc error calc 0x%x len %d\n", fcs, new_len);
470 mcs->stats.rx_errors++;
471 mcs->stats.rx_crc_errors++;
475 skb = dev_alloc_skb(new_len + 1);
477 ++mcs->stats.rx_dropped;
482 skb_copy_to_linear_data(skb, buf, new_len);
483 skb_put(skb, new_len);
484 skb_reset_mac_header(skb);
485 skb->protocol = htons(ETH_P_IRDA);
486 skb->dev = mcs->netdev;
490 mcs->stats.rx_packets++;
491 mcs->stats.rx_bytes += new_len;
497 /* Allocates urbs for both receive and transmit.
498 * If alloc fails return error code 0 (fail) otherwise
499 * return error code 1 (success).
501 static inline int mcs_setup_urbs(struct mcs_cb *mcs)
505 mcs->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
509 mcs->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
516 /* Sets up state to be initially outside frame, gets receive urb,
517 * sets status to successful and then submits the urb to start
518 * receiving the data.
520 static inline int mcs_receive_start(struct mcs_cb *mcs)
522 mcs->rx_buff.in_frame = FALSE;
523 mcs->rx_buff.state = OUTSIDE_FRAME;
525 usb_fill_bulk_urb(mcs->rx_urb, mcs->usbdev,
526 usb_rcvbulkpipe(mcs->usbdev, mcs->ep_in),
527 mcs->in_buf, 4096, mcs_receive_irq, mcs);
529 mcs->rx_urb->status = 0;
530 return usb_submit_urb(mcs->rx_urb, GFP_KERNEL);
533 /* Finds the in and out endpoints for the mcs control block */
534 static inline int mcs_find_endpoints(struct mcs_cb *mcs,
535 struct usb_host_endpoint *ep, int epnum)
540 /* If no place to store the endpoints just return */
544 /* cycle through all endpoints, find the first two that are DIR_IN */
545 for (i = 0; i < epnum; i++) {
546 if (ep[i].desc.bEndpointAddress & USB_DIR_IN)
547 mcs->ep_in = ep[i].desc.bEndpointAddress;
549 mcs->ep_out = ep[i].desc.bEndpointAddress;
551 /* MosChip says that the chip has only two bulk
552 * endpoints. Find one for each direction and move on.
554 if ((mcs->ep_in != 0) && (mcs->ep_out != 0)) {
563 static void mcs_speed_work(struct work_struct *work)
565 struct mcs_cb *mcs = container_of(work, struct mcs_cb, work);
566 struct net_device *netdev = mcs->netdev;
568 mcs_speed_change(mcs);
569 netif_wake_queue(netdev);
572 /* Function to change the speed of the mcs7780. Fully supports SIR,
573 * MIR, and FIR speeds.
575 static int mcs_speed_change(struct mcs_cb *mcs)
583 nspeed = mcs_speed_set[(mcs->new_speed >> 8) & 0x0f];
586 mcs_get_reg(mcs, MCS_RESV_REG, &rval);
587 } while(cnt++ < 100 && (rval & MCS_IRINTX));
590 IRDA_ERROR("unable to change speed\n");
595 mcs_get_reg(mcs, MCS_MODE_REG, &rval);
597 /* MINRXPW values recomended by MosChip */
598 if (mcs->new_speed <= 115200) {
601 if ((rst = (mcs->speed > 115200)))
602 mcs_set_reg(mcs, MCS_MINRXPW_REG, 0);
604 } else if (mcs->new_speed <= 1152000) {
607 if ((rst = !(mcs->speed == 576000 || mcs->speed == 1152000)))
608 mcs_set_reg(mcs, MCS_MINRXPW_REG, 5);
613 if ((rst = (mcs->speed != 4000000)))
614 mcs_set_reg(mcs, MCS_MINRXPW_REG, 5);
618 rval &= ~MCS_SPEED_MASK;
621 ret = mcs_set_reg(mcs, MCS_MODE_REG, rval);
626 switch (mcs->transceiver_type) {
628 ret = mcs_setup_transceiver_vishay(mcs);
632 ret = mcs_setup_transceiver_sharp(mcs);
635 case MCS_TSC_AGILENT:
636 ret = mcs_setup_transceiver_agilent(mcs);
641 IRDA_WARNING("Unknown transceiver type: %d\n",
642 mcs->transceiver_type);
647 mcs_get_reg(mcs, MCS_MODE_REG, &rval);
649 ret = mcs_set_reg(mcs, MCS_MODE_REG, rval);
651 mcs->speed = mcs->new_speed;
657 /* Ioctl calls not supported at this time. Can be an area of future work. */
658 static int mcs_net_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
660 /* struct if_irda_req *irq = (struct if_irda_req *)rq; */
661 /* struct mcs_cb *mcs = netdev_priv(netdev); */
672 /* Network device is taken down, done by "ifconfig irda0 down" */
673 static int mcs_net_close(struct net_device *netdev)
676 struct mcs_cb *mcs = netdev_priv(netdev);
678 /* Stop transmit processing */
679 netif_stop_queue(netdev);
681 /* kill and free the receive and transmit URBs */
682 usb_kill_urb(mcs->rx_urb);
683 usb_free_urb(mcs->rx_urb);
684 usb_kill_urb(mcs->tx_urb);
685 usb_free_urb(mcs->tx_urb);
687 /* Stop and remove instance of IrLAP */
689 irlap_close(mcs->irlap);
695 /* Network device is taken up, done by "ifconfig irda0 up" */
696 static int mcs_net_open(struct net_device *netdev)
698 struct mcs_cb *mcs = netdev_priv(netdev);
702 ret = usb_clear_halt(mcs->usbdev,
703 usb_sndbulkpipe(mcs->usbdev, mcs->ep_in));
706 ret = usb_clear_halt(mcs->usbdev,
707 usb_rcvbulkpipe(mcs->usbdev, mcs->ep_out));
711 ret = mcs_setup_transceiver(mcs);
717 /* Initialize for SIR/FIR to copy data directly into skb. */
719 mcs->rx_buff.truesize = IRDA_SKB_MAX_MTU;
720 mcs->rx_buff.skb = dev_alloc_skb(IRDA_SKB_MAX_MTU);
721 if (!mcs->rx_buff.skb)
724 skb_reserve(mcs->rx_buff.skb, 1);
725 mcs->rx_buff.head = mcs->rx_buff.skb->data;
726 do_gettimeofday(&mcs->rx_time);
729 * Now that everything should be initialized properly,
730 * Open new IrLAP layer instance to take care of us...
731 * Note : will send immediately a speed change...
733 sprintf(hwname, "usb#%d", mcs->usbdev->devnum);
734 mcs->irlap = irlap_open(netdev, &mcs->qos, hwname);
736 IRDA_ERROR("mcs7780: irlap_open failed\n");
740 if (!mcs_setup_urbs(mcs))
743 ret = mcs_receive_start(mcs);
747 netif_start_queue(netdev);
751 irlap_close(mcs->irlap);
753 kfree_skb(mcs->rx_buff.skb);
759 /* Get device stats for /proc/net/dev and ifconfig */
760 static struct net_device_stats *mcs_net_get_stats(struct net_device *netdev)
762 struct mcs_cb *mcs = netdev_priv(netdev);
766 /* Receive callback function. */
767 static void mcs_receive_irq(struct urb *urb)
770 struct mcs_cb *mcs = urb->context;
774 if (!netif_running(mcs->netdev))
780 if (urb->actual_length > 0) {
781 bytes = urb->transfer_buffer;
783 /* MCS returns frames without BOF and EOF
784 * I assume it returns whole frames.
787 if(mcs->speed < 576000) {
788 async_unwrap_char(mcs->netdev, &mcs->stats,
789 &mcs->rx_buff, 0xc0);
791 for (i = 0; i < urb->actual_length; i++)
792 async_unwrap_char(mcs->netdev, &mcs->stats,
793 &mcs->rx_buff, bytes[i]);
795 async_unwrap_char(mcs->netdev, &mcs->stats,
796 &mcs->rx_buff, 0xc1);
799 else if(mcs->speed == 576000 || mcs->speed == 1152000) {
800 mcs_unwrap_mir(mcs, urb->transfer_buffer,
805 mcs_unwrap_fir(mcs, urb->transfer_buffer,
808 mcs->netdev->last_rx = jiffies;
809 do_gettimeofday(&mcs->rx_time);
812 ret = usb_submit_urb(urb, GFP_ATOMIC);
815 /* Transmit callback funtion. */
816 static void mcs_send_irq(struct urb *urb)
818 struct mcs_cb *mcs = urb->context;
819 struct net_device *ndev = mcs->netdev;
821 if (unlikely(mcs->new_speed))
822 schedule_work(&mcs->work);
824 netif_wake_queue(ndev);
827 /* Transmit callback funtion. */
828 static int mcs_hard_xmit(struct sk_buff *skb, struct net_device *ndev)
836 if (skb == NULL || ndev == NULL)
839 netif_stop_queue(ndev);
840 mcs = netdev_priv(ndev);
842 spin_lock_irqsave(&mcs->lock, flags);
844 mcs->new_speed = irda_get_next_speed(skb);
845 if (likely(mcs->new_speed == mcs->speed))
849 if(mcs->speed < 576000) {
850 wraplen = mcs_wrap_sir_skb(skb, mcs->out_buf);
853 else if(mcs->speed == 576000 || mcs->speed == 1152000) {
854 wraplen = mcs_wrap_mir_skb(skb, mcs->out_buf);
858 wraplen = mcs_wrap_fir_skb(skb, mcs->out_buf);
860 usb_fill_bulk_urb(mcs->tx_urb, mcs->usbdev,
861 usb_sndbulkpipe(mcs->usbdev, mcs->ep_out),
862 mcs->out_buf, wraplen, mcs_send_irq, mcs);
864 if ((ret = usb_submit_urb(mcs->tx_urb, GFP_ATOMIC))) {
865 IRDA_ERROR("failed tx_urb: %d\n", ret);
871 mcs->stats.tx_errors++;
872 netif_start_queue(ndev);
875 mcs->stats.tx_packets++;
876 mcs->stats.tx_bytes += skb->len;
880 spin_unlock_irqrestore(&mcs->lock, flags);
885 * This function is called by the USB subsystem for each new device in the
886 * system. Need to verify the device and if it is, then start handling it.
888 static int mcs_probe(struct usb_interface *intf,
889 const struct usb_device_id *id)
891 struct usb_device *udev = interface_to_usbdev(intf);
892 struct net_device *ndev = NULL;
896 ndev = alloc_irdadev(sizeof(*mcs));
900 IRDA_DEBUG(1, "MCS7780 USB-IrDA bridge found at %d.\n", udev->devnum);
902 /* what is it realy for? */
903 SET_MODULE_OWNER(ndev);
904 SET_NETDEV_DEV(ndev, &intf->dev);
906 ret = usb_reset_configuration(udev);
908 IRDA_ERROR("mcs7780: usb reset configuration failed\n");
912 mcs = netdev_priv(ndev);
915 spin_lock_init(&mcs->lock);
917 /* Initialize QoS for this device */
918 irda_init_max_qos_capabilies(&mcs->qos);
920 /* That's the Rx capability. */
921 mcs->qos.baud_rate.bits &=
922 IR_2400 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200
923 | IR_576000 | IR_1152000 | (IR_4000000 << 8);
926 mcs->qos.min_turn_time.bits &= qos_mtt_bits;
927 irda_qos_bits_to_value(&mcs->qos);
929 /* Speed change work initialisation*/
930 INIT_WORK(&mcs->work, mcs_speed_work);
932 /* Override the network functions we need to use */
933 ndev->hard_start_xmit = mcs_hard_xmit;
934 ndev->open = mcs_net_open;
935 ndev->stop = mcs_net_close;
936 ndev->get_stats = mcs_net_get_stats;
937 ndev->do_ioctl = mcs_net_ioctl;
939 if (!intf->cur_altsetting)
942 ret = mcs_find_endpoints(mcs, intf->cur_altsetting->endpoint,
943 intf->cur_altsetting->desc.bNumEndpoints);
949 ret = register_netdev(ndev);
953 IRDA_DEBUG(1, "IrDA: Registered MosChip MCS7780 device as %s\n",
956 mcs->transceiver_type = transceiver_type;
957 mcs->sir_tweak = sir_tweak;
958 mcs->receive_mode = receive_mode;
960 usb_set_intfdata(intf, mcs);
970 /* The current device is removed, the USB layer tells us to shut down. */
971 static void mcs_disconnect(struct usb_interface *intf)
973 struct mcs_cb *mcs = usb_get_intfdata(intf);
978 flush_scheduled_work();
980 unregister_netdev(mcs->netdev);
981 free_netdev(mcs->netdev);
983 usb_set_intfdata(intf, NULL);
984 IRDA_DEBUG(0, "MCS7780 now disconnected.\n");
987 /* Module insertion */
988 static int __init mcs_init(void)
992 /* register this driver with the USB subsystem */
993 result = usb_register(&mcs_driver);
995 IRDA_ERROR("usb_register failed. Error number %d\n", result);
999 module_init(mcs_init);
1001 /* Module removal */
1002 static void __exit mcs_exit(void)
1004 /* deregister this driver with the USB subsystem */
1005 usb_deregister(&mcs_driver);
1007 module_exit(mcs_exit);