1 /*****************************************************************************
5 * Description: Irda SigmaTel USB Dongle
7 * Author: Stephen Hemminger <shemminger@osdl.org>
9 * Based on earlier driver by Paul Stewart <stewart@parc.com>
11 * Copyright (C) 2000, Roman Weissgaerber <weissg@vienna.at>
12 * Copyright (C) 2001, Dag Brattli <dag@brattli.net>
13 * Copyright (C) 2001, Jean Tourrilhes <jt@hpl.hp.com>
14 * Copyright (C) 2004, Stephen Hemminger <shemminger@osdl.org>
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 *****************************************************************************/
32 * This dongle does no framing, and requires polling to receive the
33 * data. The STIr4200 has bulk in and out endpoints just like
34 * usr-irda devices, but the data it sends and receives is raw; like
35 * irtty, it needs to call the wrap and unwrap functions to add and
36 * remove SOF/BOF and escape characters to/from the frame.
39 #include <linux/module.h>
40 #include <linux/moduleparam.h>
42 #include <linux/kernel.h>
43 #include <linux/sched/signal.h>
44 #include <linux/ktime.h>
45 #include <linux/types.h>
46 #include <linux/time.h>
47 #include <linux/skbuff.h>
48 #include <linux/netdevice.h>
49 #include <linux/slab.h>
50 #include <linux/delay.h>
51 #include <linux/usb.h>
52 #include <linux/crc32.h>
53 #include <linux/kthread.h>
54 #include <linux/freezer.h>
55 #include <net/irda/irda.h>
56 #include <net/irda/irda_device.h>
57 #include <net/irda/wrapper.h>
58 #include <net/irda/crc.h>
59 #include <asm/byteorder.h>
60 #include <asm/unaligned.h>
62 MODULE_AUTHOR("Stephen Hemminger <shemminger@linux-foundation.org>");
63 MODULE_DESCRIPTION("IrDA-USB Dongle Driver for SigmaTel STIr4200");
64 MODULE_LICENSE("GPL");
66 static int qos_mtt_bits
= 0x07; /* 1 ms or more */
67 module_param(qos_mtt_bits
, int, 0);
68 MODULE_PARM_DESC(qos_mtt_bits
, "Minimum Turn Time");
70 static int rx_sensitivity
= 1; /* FIR 0..4, SIR 0..6 */
71 module_param(rx_sensitivity
, int, 0);
72 MODULE_PARM_DESC(rx_sensitivity
, "Set Receiver sensitivity (0-6, 0 is most sensitive)");
74 static int tx_power
= 0; /* 0 = highest ... 3 = lowest */
75 module_param(tx_power
, int, 0);
76 MODULE_PARM_DESC(tx_power
, "Set Transmitter power (0-3, 0 is highest power)");
78 #define STIR_IRDA_HEADER 4
79 #define CTRL_TIMEOUT 100 /* milliseconds */
80 #define TRANSMIT_TIMEOUT 200 /* milliseconds */
81 #define STIR_FIFO_SIZE 4096
82 #define FIFO_REGS_SIZE 3
94 REQ_WRITE_SINGLE
= 0x03,
97 /* Register offsets */
123 PDCLK_4000000
= 0x02,
141 CTRL2_SPWIDTH
= 0x08,
145 enum StirFifoCtlMask
{
148 FIFOCTL_EMPTY
= 0x04,
165 struct usb_device
*usbdev
; /* init: probe_irda */
166 struct net_device
*netdev
; /* network layer */
167 struct irlap_cb
*irlap
; /* The link layer we are binded to */
170 unsigned speed
; /* Current speed */
172 struct task_struct
*thread
; /* transmit thread */
174 struct sk_buff
*tx_pending
;
175 void *io_buf
; /* transmit/receive buffer */
178 iobuff_t rx_buff
; /* receive unwrap state machine */
185 /* These are the currently known USB ids */
186 static struct usb_device_id dongles
[] = {
187 /* SigmaTel, Inc, STIr4200 IrDA/USB Bridge */
188 { USB_DEVICE(0x066f, 0x4200) },
192 MODULE_DEVICE_TABLE(usb
, dongles
);
194 /* Send control message to set dongle register */
195 static int write_reg(struct stir_cb
*stir
, __u16 reg
, __u8 value
)
197 struct usb_device
*dev
= stir
->usbdev
;
199 pr_debug("%s: write reg %d = 0x%x\n",
200 stir
->netdev
->name
, reg
, value
);
201 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0),
203 USB_DIR_OUT
|USB_TYPE_VENDOR
|USB_RECIP_DEVICE
,
208 /* Send control message to read multiple registers */
209 static inline int read_reg(struct stir_cb
*stir
, __u16 reg
,
210 __u8
*data
, __u16 count
)
212 struct usb_device
*dev
= stir
->usbdev
;
214 return usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0),
216 USB_DIR_IN
| USB_TYPE_VENDOR
| USB_RECIP_DEVICE
,
221 static inline int isfir(u32 speed
)
223 return speed
== 4000000;
227 * Prepare a FIR IrDA frame for transmission to the USB dongle. The
228 * FIR transmit frame is documented in the datasheet. It consists of
229 * a two byte 0x55 0xAA sequence, two little-endian length bytes, a
230 * sequence of exactly 16 XBOF bytes of 0x7E, two BOF bytes of 0x7E,
231 * then the data escaped as follows:
237 * Then, 4 bytes of little endian (stuffed) FCS follow, then two
238 * trailing EOF bytes of 0x7E.
240 static inline __u8
*stuff_fir(__u8
*p
, __u8 c
)
255 /* Take raw data in skb and put it wrapped into buf */
256 static unsigned wrap_fir_skb(const struct sk_buff
*skb
, __u8
*buf
)
259 __u32 fcs
= ~(crc32_le(~0, skb
->data
, skb
->len
));
267 ptr
= buf
+ STIR_IRDA_HEADER
;
268 memset(ptr
, 0x7f, 16);
275 /* Address / Control / Information */
276 for (i
= 0; i
< skb
->len
; i
++)
277 ptr
= stuff_fir(ptr
, skb
->data
[i
]);
280 ptr
= stuff_fir(ptr
, fcs
& 0xff);
281 ptr
= stuff_fir(ptr
, (fcs
>> 8) & 0xff);
282 ptr
= stuff_fir(ptr
, (fcs
>> 16) & 0xff);
283 ptr
= stuff_fir(ptr
, (fcs
>> 24) & 0xff);
289 /* Total length, minus the header */
290 wraplen
= (ptr
- buf
) - STIR_IRDA_HEADER
;
291 buf
[2] = wraplen
& 0xff;
292 buf
[3] = (wraplen
>> 8) & 0xff;
294 return wraplen
+ STIR_IRDA_HEADER
;
297 static unsigned wrap_sir_skb(struct sk_buff
*skb
, __u8
*buf
)
301 wraplen
= async_wrap_skb(skb
, buf
+ STIR_IRDA_HEADER
,
302 STIR_FIFO_SIZE
- STIR_IRDA_HEADER
);
305 buf
[2] = wraplen
& 0xff;
306 buf
[3] = (wraplen
>> 8) & 0xff;
308 return wraplen
+ STIR_IRDA_HEADER
;
312 * Frame is fully formed in the rx_buff so check crc
313 * and pass up to irlap
314 * setup for next receive
316 static void fir_eof(struct stir_cb
*stir
)
318 iobuff_t
*rx_buff
= &stir
->rx_buff
;
319 int len
= rx_buff
->len
- 4;
320 struct sk_buff
*skb
, *nskb
;
323 if (unlikely(len
<= 0)) {
324 pr_debug("%s: short frame len %d\n",
325 stir
->netdev
->name
, len
);
327 ++stir
->netdev
->stats
.rx_errors
;
328 ++stir
->netdev
->stats
.rx_length_errors
;
332 fcs
= ~(crc32_le(~0, rx_buff
->data
, len
));
333 if (fcs
!= get_unaligned_le32(rx_buff
->data
+ len
)) {
334 pr_debug("crc error calc 0x%x len %d\n", fcs
, len
);
335 stir
->netdev
->stats
.rx_errors
++;
336 stir
->netdev
->stats
.rx_crc_errors
++;
340 /* if frame is short then just copy it */
341 if (len
< IRDA_RX_COPY_THRESHOLD
) {
342 nskb
= dev_alloc_skb(len
+ 1);
343 if (unlikely(!nskb
)) {
344 ++stir
->netdev
->stats
.rx_dropped
;
347 skb_reserve(nskb
, 1);
349 skb_copy_to_linear_data(nskb
, rx_buff
->data
, len
);
351 nskb
= dev_alloc_skb(rx_buff
->truesize
);
352 if (unlikely(!nskb
)) {
353 ++stir
->netdev
->stats
.rx_dropped
;
356 skb_reserve(nskb
, 1);
359 rx_buff
->head
= nskb
->data
;
364 skb_reset_mac_header(skb
);
365 skb
->protocol
= htons(ETH_P_IRDA
);
366 skb
->dev
= stir
->netdev
;
370 stir
->netdev
->stats
.rx_packets
++;
371 stir
->netdev
->stats
.rx_bytes
+= len
;
373 rx_buff
->data
= rx_buff
->head
;
377 /* Unwrap FIR stuffed data and bump it to IrLAP */
378 static void stir_fir_chars(struct stir_cb
*stir
,
379 const __u8
*bytes
, int len
)
381 iobuff_t
*rx_buff
= &stir
->rx_buff
;
384 for (i
= 0; i
< len
; i
++) {
385 __u8 byte
= bytes
[i
];
387 switch(rx_buff
->state
) {
389 /* ignore garbage till start of frame */
390 if (unlikely(byte
!= FIR_EOF
))
392 /* Now receiving frame */
393 rx_buff
->state
= BEGIN_FRAME
;
395 /* Time to initialize receive buffer */
396 rx_buff
->data
= rx_buff
->head
;
401 if (byte
== FIR_EOF
) {
402 pr_debug("%s: got EOF after escape\n",
406 rx_buff
->state
= INSIDE_FRAME
;
411 /* ignore multiple BOF/EOF */
414 rx_buff
->state
= INSIDE_FRAME
;
415 rx_buff
->in_frame
= TRUE
;
421 rx_buff
->state
= LINK_ESCAPE
;
424 /* 0x7f is not used in this framing */
425 pr_debug("%s: got XBOF without escape\n",
429 rx_buff
->state
= OUTSIDE_FRAME
;
430 rx_buff
->in_frame
= FALSE
;
437 /* add byte to rx buffer */
438 if (unlikely(rx_buff
->len
>= rx_buff
->truesize
)) {
439 pr_debug("%s: fir frame exceeds %d\n",
440 stir
->netdev
->name
, rx_buff
->truesize
);
441 ++stir
->netdev
->stats
.rx_over_errors
;
445 rx_buff
->data
[rx_buff
->len
++] = byte
;
449 ++stir
->netdev
->stats
.rx_frame_errors
;
452 ++stir
->netdev
->stats
.rx_errors
;
453 rx_buff
->state
= OUTSIDE_FRAME
;
454 rx_buff
->in_frame
= FALSE
;
458 /* Unwrap SIR stuffed data and bump it up to IrLAP */
459 static void stir_sir_chars(struct stir_cb
*stir
,
460 const __u8
*bytes
, int len
)
464 for (i
= 0; i
< len
; i
++)
465 async_unwrap_char(stir
->netdev
, &stir
->netdev
->stats
,
466 &stir
->rx_buff
, bytes
[i
]);
469 static inline void unwrap_chars(struct stir_cb
*stir
,
470 const __u8
*bytes
, int length
)
472 if (isfir(stir
->speed
))
473 stir_fir_chars(stir
, bytes
, length
);
475 stir_sir_chars(stir
, bytes
, length
);
478 /* Mode parameters for each speed */
479 static const struct {
483 { 2400, PDCLK_2400
},
484 { 9600, PDCLK_9600
},
485 { 19200, PDCLK_19200
},
486 { 38400, PDCLK_38400
},
487 { 57600, PDCLK_57600
},
488 { 115200, PDCLK_115200
},
489 { 4000000, PDCLK_4000000
},
494 * Setup chip for speed.
495 * Called at startup to initialize the chip
496 * and on speed changes.
498 * Note: Write multiple registers doesn't appear to work
500 static int change_speed(struct stir_cb
*stir
, unsigned speed
)
505 for (i
= 0; i
< ARRAY_SIZE(stir_modes
); ++i
) {
506 if (speed
== stir_modes
[i
].speed
)
510 dev_warn(&stir
->netdev
->dev
, "invalid speed %d\n", speed
);
514 pr_debug("speed change from %d to %d\n", stir
->speed
, speed
);
516 /* Reset modulator */
517 err
= write_reg(stir
, REG_CTRL1
, CTRL1_SRESET
);
521 /* Undocumented magic to tweak the DPLL */
522 err
= write_reg(stir
, REG_DPLL
, 0x15);
527 err
= write_reg(stir
, REG_PDCLK
, stir_modes
[i
].pdclk
);
531 mode
= MODE_NRESET
| MODE_FASTRX
;
533 mode
|= MODE_FIR
| MODE_FFRSTEN
;
540 err
= write_reg(stir
, REG_MODE
, mode
);
544 /* This resets TEMIC style transceiver if any. */
545 err
= write_reg(stir
, REG_CTRL1
,
546 CTRL1_SDMODE
| (tx_power
& 3) << 1);
550 err
= write_reg(stir
, REG_CTRL1
, (tx_power
& 3) << 1);
554 /* Reset sensitivity */
555 err
= write_reg(stir
, REG_CTRL2
, (rx_sensitivity
& 7) << 5);
562 * Called from net/core when new frame is available.
564 static netdev_tx_t
stir_hard_xmit(struct sk_buff
*skb
,
565 struct net_device
*netdev
)
567 struct stir_cb
*stir
= netdev_priv(netdev
);
569 netif_stop_queue(netdev
);
571 /* the IRDA wrapping routines don't deal with non linear skb */
572 SKB_LINEAR_ASSERT(skb
);
574 skb
= xchg(&stir
->tx_pending
, skb
);
575 wake_up_process(stir
->thread
);
577 /* this should never happen unless stop/wakeup problem */
587 * Wait for the transmit FIFO to have space for next data
589 * If space < 0 then wait till FIFO completely drains.
590 * FYI: can take up to 13 seconds at 2400baud.
592 static int fifo_txwait(struct stir_cb
*stir
, int space
)
595 unsigned long count
, status
;
596 unsigned long prev_count
= 0x1fff;
598 /* Read FIFO status and count */
599 for (;; prev_count
= count
) {
600 err
= read_reg(stir
, REG_FIFOCTL
, stir
->fifo_status
,
602 if (unlikely(err
!= FIFO_REGS_SIZE
)) {
603 dev_warn(&stir
->netdev
->dev
,
604 "FIFO register read error: %d\n", err
);
609 status
= stir
->fifo_status
[0];
610 count
= (unsigned)(stir
->fifo_status
[2] & 0x1f) << 8
611 | stir
->fifo_status
[1];
613 pr_debug("fifo status 0x%lx count %lu\n", status
, count
);
615 /* is fifo receiving already, or empty */
616 if (!(status
& FIFOCTL_DIR
) ||
617 (status
& FIFOCTL_EMPTY
))
620 if (signal_pending(current
))
624 if (!netif_running(stir
->netdev
) ||
625 !netif_device_present(stir
->netdev
))
628 /* only waiting for some space */
629 if (space
>= 0 && STIR_FIFO_SIZE
- 4 > space
+ count
)
633 if (prev_count
< count
)
636 /* estimate transfer time for remaining chars */
637 msleep((count
* 8000) / stir
->speed
);
640 err
= write_reg(stir
, REG_FIFOCTL
, FIFOCTL_CLR
);
643 err
= write_reg(stir
, REG_FIFOCTL
, 0);
651 /* Wait for turnaround delay before starting transmit. */
652 static void turnaround_delay(const struct stir_cb
*stir
, long us
)
659 us
-= ktime_us_delta(ktime_get(), stir
->rx_time
);
664 ticks
= us
/ (1000000 / HZ
);
666 schedule_timeout_interruptible(1 + ticks
);
672 * Start receiver by submitting a request to the receive pipe.
673 * If nothing is available it will return after rx_interval.
675 static int receive_start(struct stir_cb
*stir
)
680 stir
->rx_buff
.in_frame
= FALSE
;
681 stir
->rx_buff
.state
= OUTSIDE_FRAME
;
683 stir
->rx_urb
->status
= 0;
684 return usb_submit_urb(stir
->rx_urb
, GFP_KERNEL
);
687 /* Stop all pending receive Urb's */
688 static void receive_stop(struct stir_cb
*stir
)
691 usb_kill_urb(stir
->rx_urb
);
693 if (stir
->rx_buff
.in_frame
)
694 stir
->netdev
->stats
.collisions
++;
697 * Wrap data in socket buffer and send it.
699 static void stir_send(struct stir_cb
*stir
, struct sk_buff
*skb
)
704 /* if receiving, need to turnaround */
705 if (stir
->receiving
) {
707 turnaround_delay(stir
, irda_get_mtt(skb
));
711 if (isfir(stir
->speed
))
712 wraplen
= wrap_fir_skb(skb
, stir
->io_buf
);
714 wraplen
= wrap_sir_skb(skb
, stir
->io_buf
);
716 /* check for space available in fifo */
718 fifo_txwait(stir
, wraplen
);
720 stir
->netdev
->stats
.tx_packets
++;
721 stir
->netdev
->stats
.tx_bytes
+= skb
->len
;
722 netif_trans_update(stir
->netdev
);
723 pr_debug("send %d (%d)\n", skb
->len
, wraplen
);
725 if (usb_bulk_msg(stir
->usbdev
, usb_sndbulkpipe(stir
->usbdev
, 1),
726 stir
->io_buf
, wraplen
,
727 NULL
, TRANSMIT_TIMEOUT
))
728 stir
->netdev
->stats
.tx_errors
++;
732 * Transmit state machine thread
734 static int stir_transmit_thread(void *arg
)
736 struct stir_cb
*stir
= arg
;
737 struct net_device
*dev
= stir
->netdev
;
740 while (!kthread_should_stop()) {
742 /* if suspending, then power off and wait */
743 if (unlikely(freezing(current
))) {
747 fifo_txwait(stir
, -1);
749 write_reg(stir
, REG_CTRL1
, CTRL1_TXPWD
|CTRL1_RXPWD
);
753 if (change_speed(stir
, stir
->speed
))
758 /* if something to send? */
759 skb
= xchg(&stir
->tx_pending
, NULL
);
761 unsigned new_speed
= irda_get_next_speed(skb
);
762 netif_wake_queue(dev
);
765 stir_send(stir
, skb
);
768 if ((new_speed
!= -1) && (stir
->speed
!= new_speed
)) {
769 if (fifo_txwait(stir
, -1) ||
770 change_speed(stir
, new_speed
))
776 /* nothing to send? start receiving */
777 if (!stir
->receiving
&&
778 irda_device_txqueue_empty(dev
)) {
779 /* Wait otherwise chip gets confused. */
780 if (fifo_txwait(stir
, -1))
783 if (unlikely(receive_start(stir
))) {
786 "%s: receive usb submit failed\n",
794 /* sleep if nothing to send */
795 set_current_state(TASK_INTERRUPTIBLE
);
804 * USB bulk receive completion callback.
805 * Wakes up every ms (usb round trip) with wrapped
808 static void stir_rcv_irq(struct urb
*urb
)
810 struct stir_cb
*stir
= urb
->context
;
813 /* in process of stopping, just drop data */
814 if (!netif_running(stir
->netdev
))
817 /* unlink, shutdown, unplug, other nasties */
818 if (urb
->status
!= 0)
821 if (urb
->actual_length
> 0) {
822 pr_debug("receive %d\n", urb
->actual_length
);
823 unwrap_chars(stir
, urb
->transfer_buffer
,
826 stir
->rx_time
= ktime_get();
829 /* kernel thread is stopping receiver don't resubmit */
830 if (!stir
->receiving
)
833 /* resubmit existing urb */
834 err
= usb_submit_urb(urb
, GFP_ATOMIC
);
836 /* in case of error, the kernel thread will restart us */
838 dev_warn(&stir
->netdev
->dev
, "usb receive submit error: %d\n",
841 wake_up_process(stir
->thread
);
846 * Function stir_net_open (dev)
848 * Network device is taken up. Usually this is done by "ifconfig irda0 up"
850 static int stir_net_open(struct net_device
*netdev
)
852 struct stir_cb
*stir
= netdev_priv(netdev
);
856 err
= usb_clear_halt(stir
->usbdev
, usb_sndbulkpipe(stir
->usbdev
, 1));
859 err
= usb_clear_halt(stir
->usbdev
, usb_rcvbulkpipe(stir
->usbdev
, 2));
863 err
= change_speed(stir
, 9600);
869 /* Initialize for SIR/FIR to copy data directly into skb. */
871 stir
->rx_buff
.truesize
= IRDA_SKB_MAX_MTU
;
872 stir
->rx_buff
.skb
= dev_alloc_skb(IRDA_SKB_MAX_MTU
);
873 if (!stir
->rx_buff
.skb
)
876 skb_reserve(stir
->rx_buff
.skb
, 1);
877 stir
->rx_buff
.head
= stir
->rx_buff
.skb
->data
;
878 stir
->rx_time
= ktime_get();
880 stir
->rx_urb
= usb_alloc_urb(0, GFP_KERNEL
);
884 stir
->io_buf
= kmalloc(STIR_FIFO_SIZE
, GFP_KERNEL
);
888 usb_fill_bulk_urb(stir
->rx_urb
, stir
->usbdev
,
889 usb_rcvbulkpipe(stir
->usbdev
, 2),
890 stir
->io_buf
, STIR_FIFO_SIZE
,
893 stir
->fifo_status
= kmalloc(FIFO_REGS_SIZE
, GFP_KERNEL
);
894 if (!stir
->fifo_status
)
898 * Now that everything should be initialized properly,
899 * Open new IrLAP layer instance to take care of us...
900 * Note : will send immediately a speed change...
902 sprintf(hwname
, "usb#%d", stir
->usbdev
->devnum
);
903 stir
->irlap
= irlap_open(netdev
, &stir
->qos
, hwname
);
905 dev_err(&stir
->usbdev
->dev
, "irlap_open failed\n");
909 /** Start kernel thread for transmit. */
910 stir
->thread
= kthread_run(stir_transmit_thread
, stir
,
911 "%s", stir
->netdev
->name
);
912 if (IS_ERR(stir
->thread
)) {
913 err
= PTR_ERR(stir
->thread
);
914 dev_err(&stir
->usbdev
->dev
, "unable to start kernel thread\n");
918 netif_start_queue(netdev
);
923 irlap_close(stir
->irlap
);
925 kfree(stir
->fifo_status
);
929 usb_free_urb(stir
->rx_urb
);
931 kfree_skb(stir
->rx_buff
.skb
);
937 * Function stir_net_close (stir)
939 * Network device is taken down. Usually this is done by
940 * "ifconfig irda0 down"
942 static int stir_net_close(struct net_device
*netdev
)
944 struct stir_cb
*stir
= netdev_priv(netdev
);
946 /* Stop transmit processing */
947 netif_stop_queue(netdev
);
949 /* Kill transmit thread */
950 kthread_stop(stir
->thread
);
951 kfree(stir
->fifo_status
);
953 /* Mop up receive urb's */
954 usb_kill_urb(stir
->rx_urb
);
957 usb_free_urb(stir
->rx_urb
);
958 kfree_skb(stir
->rx_buff
.skb
);
960 /* Stop and remove instance of IrLAP */
962 irlap_close(stir
->irlap
);
970 * IOCTLs : Extra out-of-band network commands...
972 static int stir_net_ioctl(struct net_device
*netdev
, struct ifreq
*rq
, int cmd
)
974 struct if_irda_req
*irq
= (struct if_irda_req
*) rq
;
975 struct stir_cb
*stir
= netdev_priv(netdev
);
979 case SIOCSBANDWIDTH
: /* Set bandwidth */
980 if (!capable(CAP_NET_ADMIN
))
983 /* Check if the device is still there */
984 if (netif_device_present(stir
->netdev
))
985 ret
= change_speed(stir
, irq
->ifr_baudrate
);
988 case SIOCSMEDIABUSY
: /* Set media busy */
989 if (!capable(CAP_NET_ADMIN
))
992 /* Check if the IrDA stack is still there */
993 if (netif_running(stir
->netdev
))
994 irda_device_set_media_busy(stir
->netdev
, TRUE
);
998 /* Only approximately true */
999 irq
->ifr_receiving
= stir
->receiving
;
1009 static const struct net_device_ops stir_netdev_ops
= {
1010 .ndo_open
= stir_net_open
,
1011 .ndo_stop
= stir_net_close
,
1012 .ndo_start_xmit
= stir_hard_xmit
,
1013 .ndo_do_ioctl
= stir_net_ioctl
,
1017 * This routine is called by the USB subsystem for each new device
1018 * in the system. We need to check if the device is ours, and in
1019 * this case start handling it.
1020 * Note : it might be worth protecting this function by a global
1021 * spinlock... Or not, because maybe USB already deal with that...
1023 static int stir_probe(struct usb_interface
*intf
,
1024 const struct usb_device_id
*id
)
1026 struct usb_device
*dev
= interface_to_usbdev(intf
);
1027 struct stir_cb
*stir
= NULL
;
1028 struct net_device
*net
;
1031 /* Allocate network device container. */
1032 net
= alloc_irdadev(sizeof(*stir
));
1036 SET_NETDEV_DEV(net
, &intf
->dev
);
1037 stir
= netdev_priv(net
);
1041 ret
= usb_reset_configuration(dev
);
1043 dev_err(&intf
->dev
, "usb reset configuration failed\n");
1047 printk(KERN_INFO
"SigmaTel STIr4200 IRDA/USB found at address %d, "
1048 "Vendor: %x, Product: %x\n",
1049 dev
->devnum
, le16_to_cpu(dev
->descriptor
.idVendor
),
1050 le16_to_cpu(dev
->descriptor
.idProduct
));
1052 /* Initialize QoS for this device */
1053 irda_init_max_qos_capabilies(&stir
->qos
);
1055 /* That's the Rx capability. */
1056 stir
->qos
.baud_rate
.bits
&= IR_2400
| IR_9600
| IR_19200
|
1057 IR_38400
| IR_57600
| IR_115200
|
1059 stir
->qos
.min_turn_time
.bits
&= qos_mtt_bits
;
1060 irda_qos_bits_to_value(&stir
->qos
);
1062 /* Override the network functions we need to use */
1063 net
->netdev_ops
= &stir_netdev_ops
;
1065 ret
= register_netdev(net
);
1069 dev_info(&intf
->dev
, "IrDA: Registered SigmaTel device %s\n",
1072 usb_set_intfdata(intf
, stir
);
1083 * The current device is removed, the USB layer tell us to shut it down...
1085 static void stir_disconnect(struct usb_interface
*intf
)
1087 struct stir_cb
*stir
= usb_get_intfdata(intf
);
1092 unregister_netdev(stir
->netdev
);
1093 free_netdev(stir
->netdev
);
1095 usb_set_intfdata(intf
, NULL
);
1099 /* USB suspend, so power off the transmitter/receiver */
1100 static int stir_suspend(struct usb_interface
*intf
, pm_message_t message
)
1102 struct stir_cb
*stir
= usb_get_intfdata(intf
);
1104 netif_device_detach(stir
->netdev
);
1108 /* Coming out of suspend, so reset hardware */
1109 static int stir_resume(struct usb_interface
*intf
)
1111 struct stir_cb
*stir
= usb_get_intfdata(intf
);
1113 netif_device_attach(stir
->netdev
);
1115 /* receiver restarted when send thread wakes up */
1121 * USB device callbacks
1123 static struct usb_driver irda_driver
= {
1125 .probe
= stir_probe
,
1126 .disconnect
= stir_disconnect
,
1127 .id_table
= dongles
,
1129 .suspend
= stir_suspend
,
1130 .resume
= stir_resume
,
1134 module_usb_driver(irda_driver
);