1 /* ZD1211 USB-WLAN driver for Linux
3 * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
4 * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
5 * Copyright (C) 2006-2007 Michael Wu <flamingice@sourmilk.net>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/firmware.h>
25 #include <linux/device.h>
26 #include <linux/errno.h>
27 #include <linux/skbuff.h>
28 #include <linux/usb.h>
29 #include <linux/workqueue.h>
30 #include <net/mac80211.h>
31 #include <asm/unaligned.h>
37 static struct usb_device_id usb_ids
[] = {
39 { USB_DEVICE(0x0ace, 0x1211), .driver_info
= DEVICE_ZD1211
},
40 { USB_DEVICE(0x0ace, 0xa211), .driver_info
= DEVICE_ZD1211
},
41 { USB_DEVICE(0x07b8, 0x6001), .driver_info
= DEVICE_ZD1211
},
42 { USB_DEVICE(0x126f, 0xa006), .driver_info
= DEVICE_ZD1211
},
43 { USB_DEVICE(0x6891, 0xa727), .driver_info
= DEVICE_ZD1211
},
44 { USB_DEVICE(0x0df6, 0x9071), .driver_info
= DEVICE_ZD1211
},
45 { USB_DEVICE(0x0df6, 0x9075), .driver_info
= DEVICE_ZD1211
},
46 { USB_DEVICE(0x157e, 0x300b), .driver_info
= DEVICE_ZD1211
},
47 { USB_DEVICE(0x079b, 0x004a), .driver_info
= DEVICE_ZD1211
},
48 { USB_DEVICE(0x1740, 0x2000), .driver_info
= DEVICE_ZD1211
},
49 { USB_DEVICE(0x157e, 0x3204), .driver_info
= DEVICE_ZD1211
},
50 { USB_DEVICE(0x0586, 0x3402), .driver_info
= DEVICE_ZD1211
},
51 { USB_DEVICE(0x0b3b, 0x5630), .driver_info
= DEVICE_ZD1211
},
52 { USB_DEVICE(0x0b05, 0x170c), .driver_info
= DEVICE_ZD1211
},
53 { USB_DEVICE(0x1435, 0x0711), .driver_info
= DEVICE_ZD1211
},
54 { USB_DEVICE(0x0586, 0x3409), .driver_info
= DEVICE_ZD1211
},
55 { USB_DEVICE(0x0b3b, 0x1630), .driver_info
= DEVICE_ZD1211
},
56 { USB_DEVICE(0x0586, 0x3401), .driver_info
= DEVICE_ZD1211
},
57 { USB_DEVICE(0x14ea, 0xab13), .driver_info
= DEVICE_ZD1211
},
58 { USB_DEVICE(0x13b1, 0x001e), .driver_info
= DEVICE_ZD1211
},
59 { USB_DEVICE(0x0586, 0x3407), .driver_info
= DEVICE_ZD1211
},
60 { USB_DEVICE(0x129b, 0x1666), .driver_info
= DEVICE_ZD1211
},
61 { USB_DEVICE(0x157e, 0x300a), .driver_info
= DEVICE_ZD1211
},
62 { USB_DEVICE(0x0105, 0x145f), .driver_info
= DEVICE_ZD1211
},
64 { USB_DEVICE(0x0ace, 0x1215), .driver_info
= DEVICE_ZD1211B
},
65 { USB_DEVICE(0x0ace, 0xb215), .driver_info
= DEVICE_ZD1211B
},
66 { USB_DEVICE(0x157e, 0x300d), .driver_info
= DEVICE_ZD1211B
},
67 { USB_DEVICE(0x079b, 0x0062), .driver_info
= DEVICE_ZD1211B
},
68 { USB_DEVICE(0x1582, 0x6003), .driver_info
= DEVICE_ZD1211B
},
69 { USB_DEVICE(0x050d, 0x705c), .driver_info
= DEVICE_ZD1211B
},
70 { USB_DEVICE(0x083a, 0xe503), .driver_info
= DEVICE_ZD1211B
},
71 { USB_DEVICE(0x083a, 0xe506), .driver_info
= DEVICE_ZD1211B
},
72 { USB_DEVICE(0x083a, 0x4505), .driver_info
= DEVICE_ZD1211B
},
73 { USB_DEVICE(0x0471, 0x1236), .driver_info
= DEVICE_ZD1211B
},
74 { USB_DEVICE(0x13b1, 0x0024), .driver_info
= DEVICE_ZD1211B
},
75 { USB_DEVICE(0x0586, 0x340f), .driver_info
= DEVICE_ZD1211B
},
76 { USB_DEVICE(0x0b05, 0x171b), .driver_info
= DEVICE_ZD1211B
},
77 { USB_DEVICE(0x0586, 0x3410), .driver_info
= DEVICE_ZD1211B
},
78 { USB_DEVICE(0x0baf, 0x0121), .driver_info
= DEVICE_ZD1211B
},
79 { USB_DEVICE(0x0586, 0x3412), .driver_info
= DEVICE_ZD1211B
},
80 { USB_DEVICE(0x0586, 0x3413), .driver_info
= DEVICE_ZD1211B
},
81 { USB_DEVICE(0x0053, 0x5301), .driver_info
= DEVICE_ZD1211B
},
82 { USB_DEVICE(0x0411, 0x00da), .driver_info
= DEVICE_ZD1211B
},
83 { USB_DEVICE(0x2019, 0x5303), .driver_info
= DEVICE_ZD1211B
},
84 { USB_DEVICE(0x129b, 0x1667), .driver_info
= DEVICE_ZD1211B
},
85 { USB_DEVICE(0x0cde, 0x001a), .driver_info
= DEVICE_ZD1211B
},
86 { USB_DEVICE(0x0586, 0x340a), .driver_info
= DEVICE_ZD1211B
},
87 { USB_DEVICE(0x0471, 0x1237), .driver_info
= DEVICE_ZD1211B
},
88 { USB_DEVICE(0x07fa, 0x1196), .driver_info
= DEVICE_ZD1211B
},
89 { USB_DEVICE(0x0df6, 0x0036), .driver_info
= DEVICE_ZD1211B
},
90 /* "Driverless" devices that need ejecting */
91 { USB_DEVICE(0x0ace, 0x2011), .driver_info
= DEVICE_INSTALLER
},
92 { USB_DEVICE(0x0ace, 0x20ff), .driver_info
= DEVICE_INSTALLER
},
96 MODULE_LICENSE("GPL");
97 MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
98 MODULE_AUTHOR("Ulrich Kunitz");
99 MODULE_AUTHOR("Daniel Drake");
100 MODULE_VERSION("1.0");
101 MODULE_DEVICE_TABLE(usb
, usb_ids
);
103 #define FW_ZD1211_PREFIX "zd1211/zd1211_"
104 #define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
106 /* USB device initialization */
107 static void int_urb_complete(struct urb
*urb
);
109 static int request_fw_file(
110 const struct firmware
**fw
, const char *name
, struct device
*device
)
114 dev_dbg_f(device
, "fw name %s\n", name
);
116 r
= request_firmware(fw
, name
, device
);
119 "Could not load firmware file %s. Error number %d\n",
124 static inline u16
get_bcdDevice(const struct usb_device
*udev
)
126 return le16_to_cpu(udev
->descriptor
.bcdDevice
);
129 enum upload_code_flags
{
133 /* Ensures that MAX_TRANSFER_SIZE is even. */
134 #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
136 static int upload_code(struct usb_device
*udev
,
137 const u8
*data
, size_t size
, u16 code_offset
, int flags
)
142 /* USB request blocks need "kmalloced" buffers.
144 p
= kmalloc(MAX_TRANSFER_SIZE
, GFP_KERNEL
);
146 dev_err(&udev
->dev
, "out of memory\n");
153 size_t transfer_size
= size
<= MAX_TRANSFER_SIZE
?
154 size
: MAX_TRANSFER_SIZE
;
156 dev_dbg_f(&udev
->dev
, "transfer size %zu\n", transfer_size
);
158 memcpy(p
, data
, transfer_size
);
159 r
= usb_control_msg(udev
, usb_sndctrlpipe(udev
, 0),
160 USB_REQ_FIRMWARE_DOWNLOAD
,
161 USB_DIR_OUT
| USB_TYPE_VENDOR
,
162 code_offset
, 0, p
, transfer_size
, 1000 /* ms */);
165 "USB control request for firmware upload"
166 " failed. Error number %d\n", r
);
169 transfer_size
= r
& ~1;
171 size
-= transfer_size
;
172 data
+= transfer_size
;
173 code_offset
+= transfer_size
/sizeof(u16
);
176 if (flags
& REBOOT
) {
179 /* Use "DMA-aware" buffer. */
180 r
= usb_control_msg(udev
, usb_rcvctrlpipe(udev
, 0),
181 USB_REQ_FIRMWARE_CONFIRM
,
182 USB_DIR_IN
| USB_TYPE_VENDOR
,
183 0, 0, p
, sizeof(ret
), 5000 /* ms */);
184 if (r
!= sizeof(ret
)) {
186 "control request firmeware confirmation failed."
187 " Return value %d\n", r
);
195 "Internal error while downloading."
196 " Firmware confirm return value %#04x\n",
201 dev_dbg_f(&udev
->dev
, "firmware confirm return value %#04x\n",
211 static u16
get_word(const void *data
, u16 offset
)
213 const __le16
*p
= data
;
214 return le16_to_cpu(p
[offset
]);
217 static char *get_fw_name(struct zd_usb
*usb
, char *buffer
, size_t size
,
220 scnprintf(buffer
, size
, "%s%s",
222 FW_ZD1211B_PREFIX
: FW_ZD1211_PREFIX
,
227 static int handle_version_mismatch(struct zd_usb
*usb
,
228 const struct firmware
*ub_fw
)
230 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
231 const struct firmware
*ur_fw
= NULL
;
236 r
= request_fw_file(&ur_fw
,
237 get_fw_name(usb
, fw_name
, sizeof(fw_name
), "ur"),
242 r
= upload_code(udev
, ur_fw
->data
, ur_fw
->size
, FW_START
, REBOOT
);
246 offset
= (E2P_BOOT_CODE_OFFSET
* sizeof(u16
));
247 r
= upload_code(udev
, ub_fw
->data
+ offset
, ub_fw
->size
- offset
,
248 E2P_START
+ E2P_BOOT_CODE_OFFSET
, REBOOT
);
250 /* At this point, the vendor driver downloads the whole firmware
251 * image, hacks around with version IDs, and uploads it again,
252 * completely overwriting the boot code. We do not do this here as
253 * it is not required on any tested devices, and it is suspected to
256 release_firmware(ur_fw
);
260 static int upload_firmware(struct zd_usb
*usb
)
265 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
266 const struct firmware
*ub_fw
= NULL
;
267 const struct firmware
*uph_fw
= NULL
;
270 bcdDevice
= get_bcdDevice(udev
);
272 r
= request_fw_file(&ub_fw
,
273 get_fw_name(usb
, fw_name
, sizeof(fw_name
), "ub"),
278 fw_bcdDevice
= get_word(ub_fw
->data
, E2P_DATA_OFFSET
);
280 if (fw_bcdDevice
!= bcdDevice
) {
282 "firmware version %#06x and device bootcode version "
283 "%#06x differ\n", fw_bcdDevice
, bcdDevice
);
284 if (bcdDevice
<= 0x4313)
285 dev_warn(&udev
->dev
, "device has old bootcode, please "
286 "report success or failure\n");
288 r
= handle_version_mismatch(usb
, ub_fw
);
292 dev_dbg_f(&udev
->dev
,
293 "firmware device id %#06x is equal to the "
294 "actual device id\n", fw_bcdDevice
);
298 r
= request_fw_file(&uph_fw
,
299 get_fw_name(usb
, fw_name
, sizeof(fw_name
), "uphr"),
304 r
= upload_code(udev
, uph_fw
->data
, uph_fw
->size
, FW_START
, REBOOT
);
307 "Could not upload firmware code uph. Error number %d\n",
313 release_firmware(ub_fw
);
314 release_firmware(uph_fw
);
318 /* Read data from device address space using "firmware interface" which does
319 * not require firmware to be loaded. */
320 int zd_usb_read_fw(struct zd_usb
*usb
, zd_addr_t addr
, u8
*data
, u16 len
)
323 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
326 /* Use "DMA-aware" buffer. */
327 buf
= kmalloc(len
, GFP_KERNEL
);
330 r
= usb_control_msg(udev
, usb_rcvctrlpipe(udev
, 0),
331 USB_REQ_FIRMWARE_READ_DATA
, USB_DIR_IN
| 0x40, addr
, 0,
335 "read over firmware interface failed: %d\n", r
);
337 } else if (r
!= len
) {
339 "incomplete read over firmware interface: %d/%d\n",
345 memcpy(data
, buf
, len
);
351 #define urb_dev(urb) (&(urb)->dev->dev)
353 static inline void handle_regs_int(struct urb
*urb
)
355 struct zd_usb
*usb
= urb
->context
;
356 struct zd_usb_interrupt
*intr
= &usb
->intr
;
360 ZD_ASSERT(in_interrupt());
361 spin_lock(&intr
->lock
);
363 int_num
= le16_to_cpu(*(__le16
*)(urb
->transfer_buffer
+2));
364 if (int_num
== CR_INTERRUPT
) {
365 struct zd_mac
*mac
= zd_hw_mac(zd_usb_to_hw(urb
->context
));
366 memcpy(&mac
->intr_buffer
, urb
->transfer_buffer
,
367 USB_MAX_EP_INT_BUFFER
);
368 schedule_work(&mac
->process_intr
);
369 } else if (intr
->read_regs_enabled
) {
370 intr
->read_regs
.length
= len
= urb
->actual_length
;
372 if (len
> sizeof(intr
->read_regs
.buffer
))
373 len
= sizeof(intr
->read_regs
.buffer
);
374 memcpy(intr
->read_regs
.buffer
, urb
->transfer_buffer
, len
);
375 intr
->read_regs_enabled
= 0;
376 complete(&intr
->read_regs
.completion
);
381 spin_unlock(&intr
->lock
);
384 static void int_urb_complete(struct urb
*urb
)
387 struct usb_int_header
*hdr
;
389 switch (urb
->status
) {
403 if (urb
->actual_length
< sizeof(hdr
)) {
404 dev_dbg_f(urb_dev(urb
), "error: urb %p to small\n", urb
);
408 hdr
= urb
->transfer_buffer
;
409 if (hdr
->type
!= USB_INT_TYPE
) {
410 dev_dbg_f(urb_dev(urb
), "error: urb %p wrong type\n", urb
);
415 case USB_INT_ID_REGS
:
416 handle_regs_int(urb
);
418 case USB_INT_ID_RETRY_FAILED
:
419 zd_mac_tx_failed(zd_usb_to_hw(urb
->context
));
422 dev_dbg_f(urb_dev(urb
), "error: urb %p unknown id %x\n", urb
,
423 (unsigned int)hdr
->id
);
428 r
= usb_submit_urb(urb
, GFP_ATOMIC
);
430 dev_dbg_f(urb_dev(urb
), "resubmit urb %p\n", urb
);
435 kfree(urb
->transfer_buffer
);
438 static inline int int_urb_interval(struct usb_device
*udev
)
440 switch (udev
->speed
) {
451 static inline int usb_int_enabled(struct zd_usb
*usb
)
454 struct zd_usb_interrupt
*intr
= &usb
->intr
;
457 spin_lock_irqsave(&intr
->lock
, flags
);
459 spin_unlock_irqrestore(&intr
->lock
, flags
);
463 int zd_usb_enable_int(struct zd_usb
*usb
)
466 struct usb_device
*udev
;
467 struct zd_usb_interrupt
*intr
= &usb
->intr
;
468 void *transfer_buffer
= NULL
;
471 dev_dbg_f(zd_usb_dev(usb
), "\n");
473 urb
= usb_alloc_urb(0, GFP_KERNEL
);
479 ZD_ASSERT(!irqs_disabled());
480 spin_lock_irq(&intr
->lock
);
482 spin_unlock_irq(&intr
->lock
);
487 spin_unlock_irq(&intr
->lock
);
489 /* TODO: make it a DMA buffer */
491 transfer_buffer
= kmalloc(USB_MAX_EP_INT_BUFFER
, GFP_KERNEL
);
492 if (!transfer_buffer
) {
493 dev_dbg_f(zd_usb_dev(usb
),
494 "couldn't allocate transfer_buffer\n");
495 goto error_set_urb_null
;
498 udev
= zd_usb_to_usbdev(usb
);
499 usb_fill_int_urb(urb
, udev
, usb_rcvintpipe(udev
, EP_INT_IN
),
500 transfer_buffer
, USB_MAX_EP_INT_BUFFER
,
501 int_urb_complete
, usb
,
504 dev_dbg_f(zd_usb_dev(usb
), "submit urb %p\n", intr
->urb
);
505 r
= usb_submit_urb(urb
, GFP_KERNEL
);
507 dev_dbg_f(zd_usb_dev(usb
),
508 "Couldn't submit urb. Error number %d\n", r
);
514 kfree(transfer_buffer
);
516 spin_lock_irq(&intr
->lock
);
518 spin_unlock_irq(&intr
->lock
);
525 void zd_usb_disable_int(struct zd_usb
*usb
)
528 struct zd_usb_interrupt
*intr
= &usb
->intr
;
531 spin_lock_irqsave(&intr
->lock
, flags
);
534 spin_unlock_irqrestore(&intr
->lock
, flags
);
538 spin_unlock_irqrestore(&intr
->lock
, flags
);
541 dev_dbg_f(zd_usb_dev(usb
), "urb %p killed\n", urb
);
545 static void handle_rx_packet(struct zd_usb
*usb
, const u8
*buffer
,
549 const struct rx_length_info
*length_info
;
551 if (length
< sizeof(struct rx_length_info
)) {
552 /* It's not a complete packet anyhow. */
555 length_info
= (struct rx_length_info
*)
556 (buffer
+ length
- sizeof(struct rx_length_info
));
558 /* It might be that three frames are merged into a single URB
559 * transaction. We have to check for the length info tag.
561 * While testing we discovered that length_info might be unaligned,
562 * because if USB transactions are merged, the last packet will not
563 * be padded. Unaligned access might also happen if the length_info
564 * structure is not present.
566 if (get_unaligned_le16(&length_info
->tag
) == RX_LENGTH_INFO_TAG
)
568 unsigned int l
, k
, n
;
569 for (i
= 0, l
= 0;; i
++) {
570 k
= get_unaligned_le16(&length_info
->length
[i
]);
576 zd_mac_rx(zd_usb_to_hw(usb
), buffer
+l
, k
);
582 zd_mac_rx(zd_usb_to_hw(usb
), buffer
, length
);
586 static void rx_urb_complete(struct urb
*urb
)
589 struct zd_usb_rx
*rx
;
593 switch (urb
->status
) {
604 dev_dbg_f(urb_dev(urb
), "urb %p error %d\n", urb
, urb
->status
);
608 buffer
= urb
->transfer_buffer
;
609 length
= urb
->actual_length
;
613 if (length
%rx
->usb_packet_size
> rx
->usb_packet_size
-4) {
614 /* If there is an old first fragment, we don't care. */
615 dev_dbg_f(urb_dev(urb
), "*** first fragment ***\n");
616 ZD_ASSERT(length
<= ARRAY_SIZE(rx
->fragment
));
617 spin_lock(&rx
->lock
);
618 memcpy(rx
->fragment
, buffer
, length
);
619 rx
->fragment_length
= length
;
620 spin_unlock(&rx
->lock
);
624 spin_lock(&rx
->lock
);
625 if (rx
->fragment_length
> 0) {
626 /* We are on a second fragment, we believe */
627 ZD_ASSERT(length
+ rx
->fragment_length
<=
628 ARRAY_SIZE(rx
->fragment
));
629 dev_dbg_f(urb_dev(urb
), "*** second fragment ***\n");
630 memcpy(rx
->fragment
+rx
->fragment_length
, buffer
, length
);
631 handle_rx_packet(usb
, rx
->fragment
,
632 rx
->fragment_length
+ length
);
633 rx
->fragment_length
= 0;
634 spin_unlock(&rx
->lock
);
636 spin_unlock(&rx
->lock
);
637 handle_rx_packet(usb
, buffer
, length
);
641 usb_submit_urb(urb
, GFP_ATOMIC
);
644 static struct urb
*alloc_rx_urb(struct zd_usb
*usb
)
646 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
650 urb
= usb_alloc_urb(0, GFP_KERNEL
);
653 buffer
= usb_buffer_alloc(udev
, USB_MAX_RX_SIZE
, GFP_KERNEL
,
660 usb_fill_bulk_urb(urb
, udev
, usb_rcvbulkpipe(udev
, EP_DATA_IN
),
661 buffer
, USB_MAX_RX_SIZE
,
662 rx_urb_complete
, usb
);
663 urb
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
668 static void free_rx_urb(struct urb
*urb
)
672 usb_buffer_free(urb
->dev
, urb
->transfer_buffer_length
,
673 urb
->transfer_buffer
, urb
->transfer_dma
);
677 int zd_usb_enable_rx(struct zd_usb
*usb
)
680 struct zd_usb_rx
*rx
= &usb
->rx
;
683 dev_dbg_f(zd_usb_dev(usb
), "\n");
686 urbs
= kcalloc(RX_URBS_COUNT
, sizeof(struct urb
*), GFP_KERNEL
);
689 for (i
= 0; i
< RX_URBS_COUNT
; i
++) {
690 urbs
[i
] = alloc_rx_urb(usb
);
695 ZD_ASSERT(!irqs_disabled());
696 spin_lock_irq(&rx
->lock
);
698 spin_unlock_irq(&rx
->lock
);
703 rx
->urbs_count
= RX_URBS_COUNT
;
704 spin_unlock_irq(&rx
->lock
);
706 for (i
= 0; i
< RX_URBS_COUNT
; i
++) {
707 r
= usb_submit_urb(urbs
[i
], GFP_KERNEL
);
714 for (i
= 0; i
< RX_URBS_COUNT
; i
++) {
715 usb_kill_urb(urbs
[i
]);
717 spin_lock_irq(&rx
->lock
);
720 spin_unlock_irq(&rx
->lock
);
723 for (i
= 0; i
< RX_URBS_COUNT
; i
++)
724 free_rx_urb(urbs
[i
]);
729 void zd_usb_disable_rx(struct zd_usb
*usb
)
735 struct zd_usb_rx
*rx
= &usb
->rx
;
737 spin_lock_irqsave(&rx
->lock
, flags
);
739 count
= rx
->urbs_count
;
740 spin_unlock_irqrestore(&rx
->lock
, flags
);
744 for (i
= 0; i
< count
; i
++) {
745 usb_kill_urb(urbs
[i
]);
746 free_rx_urb(urbs
[i
]);
750 spin_lock_irqsave(&rx
->lock
, flags
);
753 spin_unlock_irqrestore(&rx
->lock
, flags
);
757 * zd_usb_disable_tx - disable transmission
758 * @usb: the zd1211rw-private USB structure
760 * Frees all URBs in the free list and marks the transmission as disabled.
762 void zd_usb_disable_tx(struct zd_usb
*usb
)
764 struct zd_usb_tx
*tx
= &usb
->tx
;
766 struct list_head
*pos
, *n
;
768 spin_lock_irqsave(&tx
->lock
, flags
);
769 list_for_each_safe(pos
, n
, &tx
->free_urb_list
) {
771 usb_free_urb(list_entry(pos
, struct urb
, urb_list
));
774 tx
->submitted_urbs
= 0;
775 /* The stopped state is ignored, relying on ieee80211_wake_queues()
776 * in a potentionally following zd_usb_enable_tx().
778 spin_unlock_irqrestore(&tx
->lock
, flags
);
782 * zd_usb_enable_tx - enables transmission
783 * @usb: a &struct zd_usb pointer
785 * This function enables transmission and prepares the &zd_usb_tx data
788 void zd_usb_enable_tx(struct zd_usb
*usb
)
791 struct zd_usb_tx
*tx
= &usb
->tx
;
793 spin_lock_irqsave(&tx
->lock
, flags
);
795 tx
->submitted_urbs
= 0;
796 ieee80211_wake_queues(zd_usb_to_hw(usb
));
798 spin_unlock_irqrestore(&tx
->lock
, flags
);
802 * alloc_tx_urb - provides an tx URB
803 * @usb: a &struct zd_usb pointer
805 * Allocates a new URB. If possible takes the urb from the free list in
808 static struct urb
*alloc_tx_urb(struct zd_usb
*usb
)
810 struct zd_usb_tx
*tx
= &usb
->tx
;
812 struct list_head
*entry
;
815 spin_lock_irqsave(&tx
->lock
, flags
);
816 if (list_empty(&tx
->free_urb_list
)) {
817 urb
= usb_alloc_urb(0, GFP_ATOMIC
);
820 entry
= tx
->free_urb_list
.next
;
822 urb
= list_entry(entry
, struct urb
, urb_list
);
824 spin_unlock_irqrestore(&tx
->lock
, flags
);
829 * free_tx_urb - frees a used tx URB
830 * @usb: a &struct zd_usb pointer
831 * @urb: URB to be freed
833 * Frees the the transmission URB, which means to put it on the free URB
836 static void free_tx_urb(struct zd_usb
*usb
, struct urb
*urb
)
838 struct zd_usb_tx
*tx
= &usb
->tx
;
841 spin_lock_irqsave(&tx
->lock
, flags
);
846 list_add(&urb
->urb_list
, &tx
->free_urb_list
);
848 spin_unlock_irqrestore(&tx
->lock
, flags
);
851 static void tx_dec_submitted_urbs(struct zd_usb
*usb
)
853 struct zd_usb_tx
*tx
= &usb
->tx
;
856 spin_lock_irqsave(&tx
->lock
, flags
);
857 --tx
->submitted_urbs
;
858 if (tx
->stopped
&& tx
->submitted_urbs
<= ZD_USB_TX_LOW
) {
859 ieee80211_wake_queues(zd_usb_to_hw(usb
));
862 spin_unlock_irqrestore(&tx
->lock
, flags
);
865 static void tx_inc_submitted_urbs(struct zd_usb
*usb
)
867 struct zd_usb_tx
*tx
= &usb
->tx
;
870 spin_lock_irqsave(&tx
->lock
, flags
);
871 ++tx
->submitted_urbs
;
872 if (!tx
->stopped
&& tx
->submitted_urbs
> ZD_USB_TX_HIGH
) {
873 ieee80211_stop_queues(zd_usb_to_hw(usb
));
876 spin_unlock_irqrestore(&tx
->lock
, flags
);
880 * tx_urb_complete - completes the execution of an URB
883 * This function is called if the URB has been transferred to a device or an
884 * error has happened.
886 static void tx_urb_complete(struct urb
*urb
)
890 struct ieee80211_tx_info
*info
;
893 switch (urb
->status
) {
902 dev_dbg_f(urb_dev(urb
), "urb %p error %d\n", urb
, urb
->status
);
905 dev_dbg_f(urb_dev(urb
), "urb %p error %d\n", urb
, urb
->status
);
909 skb
= (struct sk_buff
*)urb
->context
;
911 * grab 'usb' pointer before handing off the skb (since
912 * it might be freed by zd_mac_tx_to_dev or mac80211)
914 info
= IEEE80211_SKB_CB(skb
);
915 usb
= &zd_hw_mac(info
->rate_driver_data
[0])->chip
.usb
;
916 zd_mac_tx_to_dev(skb
, urb
->status
);
917 free_tx_urb(usb
, urb
);
918 tx_dec_submitted_urbs(usb
);
921 r
= usb_submit_urb(urb
, GFP_ATOMIC
);
923 dev_dbg_f(urb_dev(urb
), "error resubmit urb %p %d\n", urb
, r
);
929 * zd_usb_tx: initiates transfer of a frame of the device
931 * @usb: the zd1211rw-private USB structure
932 * @skb: a &struct sk_buff pointer
934 * This function tranmits a frame to the device. It doesn't wait for
935 * completion. The frame must contain the control set and have all the
936 * control set information available.
938 * The function returns 0 if the transfer has been successfully initiated.
940 int zd_usb_tx(struct zd_usb
*usb
, struct sk_buff
*skb
)
943 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
946 urb
= alloc_tx_urb(usb
);
952 usb_fill_bulk_urb(urb
, udev
, usb_sndbulkpipe(udev
, EP_DATA_OUT
),
953 skb
->data
, skb
->len
, tx_urb_complete
, skb
);
955 r
= usb_submit_urb(urb
, GFP_ATOMIC
);
958 tx_inc_submitted_urbs(usb
);
961 free_tx_urb(usb
, urb
);
966 static inline void init_usb_interrupt(struct zd_usb
*usb
)
968 struct zd_usb_interrupt
*intr
= &usb
->intr
;
970 spin_lock_init(&intr
->lock
);
971 intr
->interval
= int_urb_interval(zd_usb_to_usbdev(usb
));
972 init_completion(&intr
->read_regs
.completion
);
973 intr
->read_regs
.cr_int_addr
= cpu_to_le16((u16
)CR_INTERRUPT
);
976 static inline void init_usb_rx(struct zd_usb
*usb
)
978 struct zd_usb_rx
*rx
= &usb
->rx
;
979 spin_lock_init(&rx
->lock
);
980 if (interface_to_usbdev(usb
->intf
)->speed
== USB_SPEED_HIGH
) {
981 rx
->usb_packet_size
= 512;
983 rx
->usb_packet_size
= 64;
985 ZD_ASSERT(rx
->fragment_length
== 0);
988 static inline void init_usb_tx(struct zd_usb
*usb
)
990 struct zd_usb_tx
*tx
= &usb
->tx
;
991 spin_lock_init(&tx
->lock
);
994 INIT_LIST_HEAD(&tx
->free_urb_list
);
995 tx
->submitted_urbs
= 0;
998 void zd_usb_init(struct zd_usb
*usb
, struct ieee80211_hw
*hw
,
999 struct usb_interface
*intf
)
1001 memset(usb
, 0, sizeof(*usb
));
1002 usb
->intf
= usb_get_intf(intf
);
1003 usb_set_intfdata(usb
->intf
, hw
);
1004 init_usb_interrupt(usb
);
1009 void zd_usb_clear(struct zd_usb
*usb
)
1011 usb_set_intfdata(usb
->intf
, NULL
);
1012 usb_put_intf(usb
->intf
);
1013 ZD_MEMCLEAR(usb
, sizeof(*usb
));
1014 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
1017 static const char *speed(enum usb_device_speed speed
)
1022 case USB_SPEED_FULL
:
1024 case USB_SPEED_HIGH
:
1027 return "unknown speed";
1031 static int scnprint_id(struct usb_device
*udev
, char *buffer
, size_t size
)
1033 return scnprintf(buffer
, size
, "%04hx:%04hx v%04hx %s",
1034 le16_to_cpu(udev
->descriptor
.idVendor
),
1035 le16_to_cpu(udev
->descriptor
.idProduct
),
1036 get_bcdDevice(udev
),
1037 speed(udev
->speed
));
1040 int zd_usb_scnprint_id(struct zd_usb
*usb
, char *buffer
, size_t size
)
1042 struct usb_device
*udev
= interface_to_usbdev(usb
->intf
);
1043 return scnprint_id(udev
, buffer
, size
);
1047 static void print_id(struct usb_device
*udev
)
1051 scnprint_id(udev
, buffer
, sizeof(buffer
));
1052 buffer
[sizeof(buffer
)-1] = 0;
1053 dev_dbg_f(&udev
->dev
, "%s\n", buffer
);
1056 #define print_id(udev) do { } while (0)
1059 static int eject_installer(struct usb_interface
*intf
)
1061 struct usb_device
*udev
= interface_to_usbdev(intf
);
1062 struct usb_host_interface
*iface_desc
= &intf
->altsetting
[0];
1063 struct usb_endpoint_descriptor
*endpoint
;
1068 /* Find bulk out endpoint */
1069 endpoint
= &iface_desc
->endpoint
[1].desc
;
1070 if ((endpoint
->bEndpointAddress
& USB_TYPE_MASK
) == USB_DIR_OUT
&&
1071 usb_endpoint_xfer_bulk(endpoint
)) {
1072 bulk_out_ep
= endpoint
->bEndpointAddress
;
1075 "zd1211rw: Could not find bulk out endpoint\n");
1079 cmd
= kzalloc(31, GFP_KERNEL
);
1083 /* USB bulk command block */
1084 cmd
[0] = 0x55; /* bulk command signature */
1085 cmd
[1] = 0x53; /* bulk command signature */
1086 cmd
[2] = 0x42; /* bulk command signature */
1087 cmd
[3] = 0x43; /* bulk command signature */
1088 cmd
[14] = 6; /* command length */
1090 cmd
[15] = 0x1b; /* SCSI command: START STOP UNIT */
1091 cmd
[19] = 0x2; /* eject disc */
1093 dev_info(&udev
->dev
, "Ejecting virtual installer media...\n");
1094 r
= usb_bulk_msg(udev
, usb_sndbulkpipe(udev
, bulk_out_ep
),
1095 cmd
, 31, NULL
, 2000);
1100 /* At this point, the device disconnects and reconnects with the real
1103 usb_set_intfdata(intf
, NULL
);
1107 int zd_usb_init_hw(struct zd_usb
*usb
)
1110 struct zd_mac
*mac
= zd_usb_to_mac(usb
);
1112 dev_dbg_f(zd_usb_dev(usb
), "\n");
1114 r
= upload_firmware(usb
);
1116 dev_err(zd_usb_dev(usb
),
1117 "couldn't load firmware. Error number %d\n", r
);
1121 r
= usb_reset_configuration(zd_usb_to_usbdev(usb
));
1123 dev_dbg_f(zd_usb_dev(usb
),
1124 "couldn't reset configuration. Error number %d\n", r
);
1128 r
= zd_mac_init_hw(mac
->hw
);
1130 dev_dbg_f(zd_usb_dev(usb
),
1131 "couldn't initialize mac. Error number %d\n", r
);
1135 usb
->initialized
= 1;
1139 static int probe(struct usb_interface
*intf
, const struct usb_device_id
*id
)
1142 struct usb_device
*udev
= interface_to_usbdev(intf
);
1144 struct ieee80211_hw
*hw
= NULL
;
1148 if (id
->driver_info
& DEVICE_INSTALLER
)
1149 return eject_installer(intf
);
1151 switch (udev
->speed
) {
1153 case USB_SPEED_FULL
:
1154 case USB_SPEED_HIGH
:
1157 dev_dbg_f(&intf
->dev
, "Unknown USB speed\n");
1162 r
= usb_reset_device(udev
);
1165 "couldn't reset usb device. Error number %d\n", r
);
1169 hw
= zd_mac_alloc_hw(intf
);
1175 usb
= &zd_hw_mac(hw
)->chip
.usb
;
1176 usb
->is_zd1211b
= (id
->driver_info
== DEVICE_ZD1211B
) != 0;
1178 r
= zd_mac_preinit_hw(hw
);
1180 dev_dbg_f(&intf
->dev
,
1181 "couldn't initialize mac. Error number %d\n", r
);
1185 r
= ieee80211_register_hw(hw
);
1187 dev_dbg_f(&intf
->dev
,
1188 "couldn't register device. Error number %d\n", r
);
1192 dev_dbg_f(&intf
->dev
, "successful\n");
1193 dev_info(&intf
->dev
, "%s\n", wiphy_name(hw
->wiphy
));
1196 usb_reset_device(interface_to_usbdev(intf
));
1198 zd_mac_clear(zd_hw_mac(hw
));
1199 ieee80211_free_hw(hw
);
1204 static void disconnect(struct usb_interface
*intf
)
1206 struct ieee80211_hw
*hw
= zd_intf_to_hw(intf
);
1210 /* Either something really bad happened, or we're just dealing with
1211 * a DEVICE_INSTALLER. */
1215 mac
= zd_hw_mac(hw
);
1216 usb
= &mac
->chip
.usb
;
1218 dev_dbg_f(zd_usb_dev(usb
), "\n");
1220 ieee80211_unregister_hw(hw
);
1222 /* Just in case something has gone wrong! */
1223 zd_usb_disable_rx(usb
);
1224 zd_usb_disable_int(usb
);
1226 /* If the disconnect has been caused by a removal of the
1227 * driver module, the reset allows reloading of the driver. If the
1228 * reset will not be executed here, the upload of the firmware in the
1229 * probe function caused by the reloading of the driver will fail.
1231 usb_reset_device(interface_to_usbdev(intf
));
1234 ieee80211_free_hw(hw
);
1235 dev_dbg(&intf
->dev
, "disconnected\n");
1238 static struct usb_driver driver
= {
1239 .name
= KBUILD_MODNAME
,
1240 .id_table
= usb_ids
,
1242 .disconnect
= disconnect
,
1245 struct workqueue_struct
*zd_workqueue
;
1247 static int __init
usb_init(void)
1251 pr_debug("%s usb_init()\n", driver
.name
);
1253 zd_workqueue
= create_singlethread_workqueue(driver
.name
);
1254 if (zd_workqueue
== NULL
) {
1255 printk(KERN_ERR
"%s couldn't create workqueue\n", driver
.name
);
1259 r
= usb_register(&driver
);
1261 destroy_workqueue(zd_workqueue
);
1262 printk(KERN_ERR
"%s usb_register() failed. Error number %d\n",
1267 pr_debug("%s initialized\n", driver
.name
);
1271 static void __exit
usb_exit(void)
1273 pr_debug("%s usb_exit()\n", driver
.name
);
1274 usb_deregister(&driver
);
1275 destroy_workqueue(zd_workqueue
);
1278 module_init(usb_init
);
1279 module_exit(usb_exit
);
1281 static int usb_int_regs_length(unsigned int count
)
1283 return sizeof(struct usb_int_regs
) + count
* sizeof(struct reg_data
);
1286 static void prepare_read_regs_int(struct zd_usb
*usb
)
1288 struct zd_usb_interrupt
*intr
= &usb
->intr
;
1290 spin_lock_irq(&intr
->lock
);
1291 intr
->read_regs_enabled
= 1;
1292 INIT_COMPLETION(intr
->read_regs
.completion
);
1293 spin_unlock_irq(&intr
->lock
);
1296 static void disable_read_regs_int(struct zd_usb
*usb
)
1298 struct zd_usb_interrupt
*intr
= &usb
->intr
;
1300 spin_lock_irq(&intr
->lock
);
1301 intr
->read_regs_enabled
= 0;
1302 spin_unlock_irq(&intr
->lock
);
1305 static int get_results(struct zd_usb
*usb
, u16
*values
,
1306 struct usb_req_read_regs
*req
, unsigned int count
)
1310 struct zd_usb_interrupt
*intr
= &usb
->intr
;
1311 struct read_regs_int
*rr
= &intr
->read_regs
;
1312 struct usb_int_regs
*regs
= (struct usb_int_regs
*)rr
->buffer
;
1314 spin_lock_irq(&intr
->lock
);
1317 /* The created block size seems to be larger than expected.
1318 * However results appear to be correct.
1320 if (rr
->length
< usb_int_regs_length(count
)) {
1321 dev_dbg_f(zd_usb_dev(usb
),
1322 "error: actual length %d less than expected %d\n",
1323 rr
->length
, usb_int_regs_length(count
));
1326 if (rr
->length
> sizeof(rr
->buffer
)) {
1327 dev_dbg_f(zd_usb_dev(usb
),
1328 "error: actual length %d exceeds buffer size %zu\n",
1329 rr
->length
, sizeof(rr
->buffer
));
1333 for (i
= 0; i
< count
; i
++) {
1334 struct reg_data
*rd
= ®s
->regs
[i
];
1335 if (rd
->addr
!= req
->addr
[i
]) {
1336 dev_dbg_f(zd_usb_dev(usb
),
1337 "rd[%d] addr %#06hx expected %#06hx\n", i
,
1338 le16_to_cpu(rd
->addr
),
1339 le16_to_cpu(req
->addr
[i
]));
1342 values
[i
] = le16_to_cpu(rd
->value
);
1347 spin_unlock_irq(&intr
->lock
);
1351 int zd_usb_ioread16v(struct zd_usb
*usb
, u16
*values
,
1352 const zd_addr_t
*addresses
, unsigned int count
)
1355 int i
, req_len
, actual_req_len
;
1356 struct usb_device
*udev
;
1357 struct usb_req_read_regs
*req
= NULL
;
1358 unsigned long timeout
;
1361 dev_dbg_f(zd_usb_dev(usb
), "error: count is zero\n");
1364 if (count
> USB_MAX_IOREAD16_COUNT
) {
1365 dev_dbg_f(zd_usb_dev(usb
),
1366 "error: count %u exceeds possible max %u\n",
1367 count
, USB_MAX_IOREAD16_COUNT
);
1371 dev_dbg_f(zd_usb_dev(usb
),
1372 "error: io in atomic context not supported\n");
1373 return -EWOULDBLOCK
;
1375 if (!usb_int_enabled(usb
)) {
1376 dev_dbg_f(zd_usb_dev(usb
),
1377 "error: usb interrupt not enabled\n");
1378 return -EWOULDBLOCK
;
1381 req_len
= sizeof(struct usb_req_read_regs
) + count
* sizeof(__le16
);
1382 req
= kmalloc(req_len
, GFP_KERNEL
);
1385 req
->id
= cpu_to_le16(USB_REQ_READ_REGS
);
1386 for (i
= 0; i
< count
; i
++)
1387 req
->addr
[i
] = cpu_to_le16((u16
)addresses
[i
]);
1389 udev
= zd_usb_to_usbdev(usb
);
1390 prepare_read_regs_int(usb
);
1391 r
= usb_bulk_msg(udev
, usb_sndbulkpipe(udev
, EP_REGS_OUT
),
1392 req
, req_len
, &actual_req_len
, 1000 /* ms */);
1394 dev_dbg_f(zd_usb_dev(usb
),
1395 "error in usb_bulk_msg(). Error number %d\n", r
);
1398 if (req_len
!= actual_req_len
) {
1399 dev_dbg_f(zd_usb_dev(usb
), "error in usb_bulk_msg()\n"
1400 " req_len %d != actual_req_len %d\n",
1401 req_len
, actual_req_len
);
1406 timeout
= wait_for_completion_timeout(&usb
->intr
.read_regs
.completion
,
1407 msecs_to_jiffies(1000));
1409 disable_read_regs_int(usb
);
1410 dev_dbg_f(zd_usb_dev(usb
), "read timed out\n");
1415 r
= get_results(usb
, values
, req
, count
);
1421 int zd_usb_iowrite16v(struct zd_usb
*usb
, const struct zd_ioreq16
*ioreqs
,
1425 struct usb_device
*udev
;
1426 struct usb_req_write_regs
*req
= NULL
;
1427 int i
, req_len
, actual_req_len
;
1431 if (count
> USB_MAX_IOWRITE16_COUNT
) {
1432 dev_dbg_f(zd_usb_dev(usb
),
1433 "error: count %u exceeds possible max %u\n",
1434 count
, USB_MAX_IOWRITE16_COUNT
);
1438 dev_dbg_f(zd_usb_dev(usb
),
1439 "error: io in atomic context not supported\n");
1440 return -EWOULDBLOCK
;
1443 req_len
= sizeof(struct usb_req_write_regs
) +
1444 count
* sizeof(struct reg_data
);
1445 req
= kmalloc(req_len
, GFP_KERNEL
);
1449 req
->id
= cpu_to_le16(USB_REQ_WRITE_REGS
);
1450 for (i
= 0; i
< count
; i
++) {
1451 struct reg_data
*rw
= &req
->reg_writes
[i
];
1452 rw
->addr
= cpu_to_le16((u16
)ioreqs
[i
].addr
);
1453 rw
->value
= cpu_to_le16(ioreqs
[i
].value
);
1456 udev
= zd_usb_to_usbdev(usb
);
1457 r
= usb_bulk_msg(udev
, usb_sndbulkpipe(udev
, EP_REGS_OUT
),
1458 req
, req_len
, &actual_req_len
, 1000 /* ms */);
1460 dev_dbg_f(zd_usb_dev(usb
),
1461 "error in usb_bulk_msg(). Error number %d\n", r
);
1464 if (req_len
!= actual_req_len
) {
1465 dev_dbg_f(zd_usb_dev(usb
),
1466 "error in usb_bulk_msg()"
1467 " req_len %d != actual_req_len %d\n",
1468 req_len
, actual_req_len
);
1473 /* FALL-THROUGH with r == 0 */
1479 int zd_usb_rfwrite(struct zd_usb
*usb
, u32 value
, u8 bits
)
1482 struct usb_device
*udev
;
1483 struct usb_req_rfwrite
*req
= NULL
;
1484 int i
, req_len
, actual_req_len
;
1485 u16 bit_value_template
;
1488 dev_dbg_f(zd_usb_dev(usb
),
1489 "error: io in atomic context not supported\n");
1490 return -EWOULDBLOCK
;
1492 if (bits
< USB_MIN_RFWRITE_BIT_COUNT
) {
1493 dev_dbg_f(zd_usb_dev(usb
),
1494 "error: bits %d are smaller than"
1495 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1496 bits
, USB_MIN_RFWRITE_BIT_COUNT
);
1499 if (bits
> USB_MAX_RFWRITE_BIT_COUNT
) {
1500 dev_dbg_f(zd_usb_dev(usb
),
1501 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1502 bits
, USB_MAX_RFWRITE_BIT_COUNT
);
1506 if (value
& (~0UL << bits
)) {
1507 dev_dbg_f(zd_usb_dev(usb
),
1508 "error: value %#09x has bits >= %d set\n",
1514 dev_dbg_f(zd_usb_dev(usb
), "value %#09x bits %d\n", value
, bits
);
1516 r
= zd_usb_ioread16(usb
, &bit_value_template
, CR203
);
1518 dev_dbg_f(zd_usb_dev(usb
),
1519 "error %d: Couldn't read CR203\n", r
);
1522 bit_value_template
&= ~(RF_IF_LE
|RF_CLK
|RF_DATA
);
1524 req_len
= sizeof(struct usb_req_rfwrite
) + bits
* sizeof(__le16
);
1525 req
= kmalloc(req_len
, GFP_KERNEL
);
1529 req
->id
= cpu_to_le16(USB_REQ_WRITE_RF
);
1530 /* 1: 3683a, but not used in ZYDAS driver */
1531 req
->value
= cpu_to_le16(2);
1532 req
->bits
= cpu_to_le16(bits
);
1534 for (i
= 0; i
< bits
; i
++) {
1535 u16 bv
= bit_value_template
;
1536 if (value
& (1 << (bits
-1-i
)))
1538 req
->bit_values
[i
] = cpu_to_le16(bv
);
1541 udev
= zd_usb_to_usbdev(usb
);
1542 r
= usb_bulk_msg(udev
, usb_sndbulkpipe(udev
, EP_REGS_OUT
),
1543 req
, req_len
, &actual_req_len
, 1000 /* ms */);
1545 dev_dbg_f(zd_usb_dev(usb
),
1546 "error in usb_bulk_msg(). Error number %d\n", r
);
1549 if (req_len
!= actual_req_len
) {
1550 dev_dbg_f(zd_usb_dev(usb
), "error in usb_bulk_msg()"
1551 " req_len %d != actual_req_len %d\n",
1552 req_len
, actual_req_len
);
1557 /* FALL-THROUGH with r == 0 */