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, 0xe506), .driver_info
= DEVICE_ZD1211B
},
71 { USB_DEVICE(0x083a, 0x4505), .driver_info
= DEVICE_ZD1211B
},
72 { USB_DEVICE(0x0471, 0x1236), .driver_info
= DEVICE_ZD1211B
},
73 { USB_DEVICE(0x13b1, 0x0024), .driver_info
= DEVICE_ZD1211B
},
74 { USB_DEVICE(0x0586, 0x340f), .driver_info
= DEVICE_ZD1211B
},
75 { USB_DEVICE(0x0b05, 0x171b), .driver_info
= DEVICE_ZD1211B
},
76 { USB_DEVICE(0x0586, 0x3410), .driver_info
= DEVICE_ZD1211B
},
77 { USB_DEVICE(0x0baf, 0x0121), .driver_info
= DEVICE_ZD1211B
},
78 { USB_DEVICE(0x0586, 0x3412), .driver_info
= DEVICE_ZD1211B
},
79 { USB_DEVICE(0x0586, 0x3413), .driver_info
= DEVICE_ZD1211B
},
80 { USB_DEVICE(0x0053, 0x5301), .driver_info
= DEVICE_ZD1211B
},
81 { USB_DEVICE(0x0411, 0x00da), .driver_info
= DEVICE_ZD1211B
},
82 { USB_DEVICE(0x2019, 0x5303), .driver_info
= DEVICE_ZD1211B
},
83 { USB_DEVICE(0x129b, 0x1667), .driver_info
= DEVICE_ZD1211B
},
84 { USB_DEVICE(0x0cde, 0x001a), .driver_info
= DEVICE_ZD1211B
},
85 { USB_DEVICE(0x0586, 0x340a), .driver_info
= DEVICE_ZD1211B
},
86 { USB_DEVICE(0x0471, 0x1237), .driver_info
= DEVICE_ZD1211B
},
87 { USB_DEVICE(0x07fa, 0x1196), .driver_info
= DEVICE_ZD1211B
},
88 { USB_DEVICE(0x0df6, 0x0036), .driver_info
= DEVICE_ZD1211B
},
89 /* "Driverless" devices that need ejecting */
90 { USB_DEVICE(0x0ace, 0x2011), .driver_info
= DEVICE_INSTALLER
},
91 { USB_DEVICE(0x0ace, 0x20ff), .driver_info
= DEVICE_INSTALLER
},
95 MODULE_LICENSE("GPL");
96 MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
97 MODULE_AUTHOR("Ulrich Kunitz");
98 MODULE_AUTHOR("Daniel Drake");
99 MODULE_VERSION("1.0");
100 MODULE_DEVICE_TABLE(usb
, usb_ids
);
102 #define FW_ZD1211_PREFIX "zd1211/zd1211_"
103 #define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
105 /* USB device initialization */
106 static void int_urb_complete(struct urb
*urb
);
108 static int request_fw_file(
109 const struct firmware
**fw
, const char *name
, struct device
*device
)
113 dev_dbg_f(device
, "fw name %s\n", name
);
115 r
= request_firmware(fw
, name
, device
);
118 "Could not load firmware file %s. Error number %d\n",
123 static inline u16
get_bcdDevice(const struct usb_device
*udev
)
125 return le16_to_cpu(udev
->descriptor
.bcdDevice
);
128 enum upload_code_flags
{
132 /* Ensures that MAX_TRANSFER_SIZE is even. */
133 #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
135 static int upload_code(struct usb_device
*udev
,
136 const u8
*data
, size_t size
, u16 code_offset
, int flags
)
141 /* USB request blocks need "kmalloced" buffers.
143 p
= kmalloc(MAX_TRANSFER_SIZE
, GFP_KERNEL
);
145 dev_err(&udev
->dev
, "out of memory\n");
152 size_t transfer_size
= size
<= MAX_TRANSFER_SIZE
?
153 size
: MAX_TRANSFER_SIZE
;
155 dev_dbg_f(&udev
->dev
, "transfer size %zu\n", transfer_size
);
157 memcpy(p
, data
, transfer_size
);
158 r
= usb_control_msg(udev
, usb_sndctrlpipe(udev
, 0),
159 USB_REQ_FIRMWARE_DOWNLOAD
,
160 USB_DIR_OUT
| USB_TYPE_VENDOR
,
161 code_offset
, 0, p
, transfer_size
, 1000 /* ms */);
164 "USB control request for firmware upload"
165 " failed. Error number %d\n", r
);
168 transfer_size
= r
& ~1;
170 size
-= transfer_size
;
171 data
+= transfer_size
;
172 code_offset
+= transfer_size
/sizeof(u16
);
175 if (flags
& REBOOT
) {
178 /* Use "DMA-aware" buffer. */
179 r
= usb_control_msg(udev
, usb_rcvctrlpipe(udev
, 0),
180 USB_REQ_FIRMWARE_CONFIRM
,
181 USB_DIR_IN
| USB_TYPE_VENDOR
,
182 0, 0, p
, sizeof(ret
), 5000 /* ms */);
183 if (r
!= sizeof(ret
)) {
185 "control request firmeware confirmation failed."
186 " Return value %d\n", r
);
194 "Internal error while downloading."
195 " Firmware confirm return value %#04x\n",
200 dev_dbg_f(&udev
->dev
, "firmware confirm return value %#04x\n",
210 static u16
get_word(const void *data
, u16 offset
)
212 const __le16
*p
= data
;
213 return le16_to_cpu(p
[offset
]);
216 static char *get_fw_name(struct zd_usb
*usb
, char *buffer
, size_t size
,
219 scnprintf(buffer
, size
, "%s%s",
221 FW_ZD1211B_PREFIX
: FW_ZD1211_PREFIX
,
226 static int handle_version_mismatch(struct zd_usb
*usb
,
227 const struct firmware
*ub_fw
)
229 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
230 const struct firmware
*ur_fw
= NULL
;
235 r
= request_fw_file(&ur_fw
,
236 get_fw_name(usb
, fw_name
, sizeof(fw_name
), "ur"),
241 r
= upload_code(udev
, ur_fw
->data
, ur_fw
->size
, FW_START
, REBOOT
);
245 offset
= (E2P_BOOT_CODE_OFFSET
* sizeof(u16
));
246 r
= upload_code(udev
, ub_fw
->data
+ offset
, ub_fw
->size
- offset
,
247 E2P_START
+ E2P_BOOT_CODE_OFFSET
, REBOOT
);
249 /* At this point, the vendor driver downloads the whole firmware
250 * image, hacks around with version IDs, and uploads it again,
251 * completely overwriting the boot code. We do not do this here as
252 * it is not required on any tested devices, and it is suspected to
255 release_firmware(ur_fw
);
259 static int upload_firmware(struct zd_usb
*usb
)
264 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
265 const struct firmware
*ub_fw
= NULL
;
266 const struct firmware
*uph_fw
= NULL
;
269 bcdDevice
= get_bcdDevice(udev
);
271 r
= request_fw_file(&ub_fw
,
272 get_fw_name(usb
, fw_name
, sizeof(fw_name
), "ub"),
277 fw_bcdDevice
= get_word(ub_fw
->data
, E2P_DATA_OFFSET
);
279 if (fw_bcdDevice
!= bcdDevice
) {
281 "firmware version %#06x and device bootcode version "
282 "%#06x differ\n", fw_bcdDevice
, bcdDevice
);
283 if (bcdDevice
<= 0x4313)
284 dev_warn(&udev
->dev
, "device has old bootcode, please "
285 "report success or failure\n");
287 r
= handle_version_mismatch(usb
, ub_fw
);
291 dev_dbg_f(&udev
->dev
,
292 "firmware device id %#06x is equal to the "
293 "actual device id\n", fw_bcdDevice
);
297 r
= request_fw_file(&uph_fw
,
298 get_fw_name(usb
, fw_name
, sizeof(fw_name
), "uphr"),
303 r
= upload_code(udev
, uph_fw
->data
, uph_fw
->size
, FW_START
, REBOOT
);
306 "Could not upload firmware code uph. Error number %d\n",
312 release_firmware(ub_fw
);
313 release_firmware(uph_fw
);
317 /* Read data from device address space using "firmware interface" which does
318 * not require firmware to be loaded. */
319 int zd_usb_read_fw(struct zd_usb
*usb
, zd_addr_t addr
, u8
*data
, u16 len
)
322 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
325 /* Use "DMA-aware" buffer. */
326 buf
= kmalloc(len
, GFP_KERNEL
);
329 r
= usb_control_msg(udev
, usb_rcvctrlpipe(udev
, 0),
330 USB_REQ_FIRMWARE_READ_DATA
, USB_DIR_IN
| 0x40, addr
, 0,
334 "read over firmware interface failed: %d\n", r
);
336 } else if (r
!= len
) {
338 "incomplete read over firmware interface: %d/%d\n",
344 memcpy(data
, buf
, len
);
350 #define urb_dev(urb) (&(urb)->dev->dev)
352 static inline void handle_regs_int(struct urb
*urb
)
354 struct zd_usb
*usb
= urb
->context
;
355 struct zd_usb_interrupt
*intr
= &usb
->intr
;
359 ZD_ASSERT(in_interrupt());
360 spin_lock(&intr
->lock
);
362 int_num
= le16_to_cpu(*(__le16
*)(urb
->transfer_buffer
+2));
363 if (int_num
== CR_INTERRUPT
) {
364 struct zd_mac
*mac
= zd_hw_mac(zd_usb_to_hw(urb
->context
));
365 memcpy(&mac
->intr_buffer
, urb
->transfer_buffer
,
366 USB_MAX_EP_INT_BUFFER
);
367 schedule_work(&mac
->process_intr
);
368 } else if (intr
->read_regs_enabled
) {
369 intr
->read_regs
.length
= len
= urb
->actual_length
;
371 if (len
> sizeof(intr
->read_regs
.buffer
))
372 len
= sizeof(intr
->read_regs
.buffer
);
373 memcpy(intr
->read_regs
.buffer
, urb
->transfer_buffer
, len
);
374 intr
->read_regs_enabled
= 0;
375 complete(&intr
->read_regs
.completion
);
380 spin_unlock(&intr
->lock
);
383 static void int_urb_complete(struct urb
*urb
)
386 struct usb_int_header
*hdr
;
388 switch (urb
->status
) {
402 if (urb
->actual_length
< sizeof(hdr
)) {
403 dev_dbg_f(urb_dev(urb
), "error: urb %p to small\n", urb
);
407 hdr
= urb
->transfer_buffer
;
408 if (hdr
->type
!= USB_INT_TYPE
) {
409 dev_dbg_f(urb_dev(urb
), "error: urb %p wrong type\n", urb
);
414 case USB_INT_ID_REGS
:
415 handle_regs_int(urb
);
417 case USB_INT_ID_RETRY_FAILED
:
418 zd_mac_tx_failed(zd_usb_to_hw(urb
->context
));
421 dev_dbg_f(urb_dev(urb
), "error: urb %p unknown id %x\n", urb
,
422 (unsigned int)hdr
->id
);
427 r
= usb_submit_urb(urb
, GFP_ATOMIC
);
429 dev_dbg_f(urb_dev(urb
), "resubmit urb %p\n", urb
);
434 kfree(urb
->transfer_buffer
);
437 static inline int int_urb_interval(struct usb_device
*udev
)
439 switch (udev
->speed
) {
450 static inline int usb_int_enabled(struct zd_usb
*usb
)
453 struct zd_usb_interrupt
*intr
= &usb
->intr
;
456 spin_lock_irqsave(&intr
->lock
, flags
);
458 spin_unlock_irqrestore(&intr
->lock
, flags
);
462 int zd_usb_enable_int(struct zd_usb
*usb
)
465 struct usb_device
*udev
;
466 struct zd_usb_interrupt
*intr
= &usb
->intr
;
467 void *transfer_buffer
= NULL
;
470 dev_dbg_f(zd_usb_dev(usb
), "\n");
472 urb
= usb_alloc_urb(0, GFP_KERNEL
);
478 ZD_ASSERT(!irqs_disabled());
479 spin_lock_irq(&intr
->lock
);
481 spin_unlock_irq(&intr
->lock
);
486 spin_unlock_irq(&intr
->lock
);
488 /* TODO: make it a DMA buffer */
490 transfer_buffer
= kmalloc(USB_MAX_EP_INT_BUFFER
, GFP_KERNEL
);
491 if (!transfer_buffer
) {
492 dev_dbg_f(zd_usb_dev(usb
),
493 "couldn't allocate transfer_buffer\n");
494 goto error_set_urb_null
;
497 udev
= zd_usb_to_usbdev(usb
);
498 usb_fill_int_urb(urb
, udev
, usb_rcvintpipe(udev
, EP_INT_IN
),
499 transfer_buffer
, USB_MAX_EP_INT_BUFFER
,
500 int_urb_complete
, usb
,
503 dev_dbg_f(zd_usb_dev(usb
), "submit urb %p\n", intr
->urb
);
504 r
= usb_submit_urb(urb
, GFP_KERNEL
);
506 dev_dbg_f(zd_usb_dev(usb
),
507 "Couldn't submit urb. Error number %d\n", r
);
513 kfree(transfer_buffer
);
515 spin_lock_irq(&intr
->lock
);
517 spin_unlock_irq(&intr
->lock
);
524 void zd_usb_disable_int(struct zd_usb
*usb
)
527 struct zd_usb_interrupt
*intr
= &usb
->intr
;
530 spin_lock_irqsave(&intr
->lock
, flags
);
533 spin_unlock_irqrestore(&intr
->lock
, flags
);
537 spin_unlock_irqrestore(&intr
->lock
, flags
);
540 dev_dbg_f(zd_usb_dev(usb
), "urb %p killed\n", urb
);
544 static void handle_rx_packet(struct zd_usb
*usb
, const u8
*buffer
,
548 const struct rx_length_info
*length_info
;
550 if (length
< sizeof(struct rx_length_info
)) {
551 /* It's not a complete packet anyhow. */
554 length_info
= (struct rx_length_info
*)
555 (buffer
+ length
- sizeof(struct rx_length_info
));
557 /* It might be that three frames are merged into a single URB
558 * transaction. We have to check for the length info tag.
560 * While testing we discovered that length_info might be unaligned,
561 * because if USB transactions are merged, the last packet will not
562 * be padded. Unaligned access might also happen if the length_info
563 * structure is not present.
565 if (get_unaligned_le16(&length_info
->tag
) == RX_LENGTH_INFO_TAG
)
567 unsigned int l
, k
, n
;
568 for (i
= 0, l
= 0;; i
++) {
569 k
= get_unaligned_le16(&length_info
->length
[i
]);
575 zd_mac_rx(zd_usb_to_hw(usb
), buffer
+l
, k
);
581 zd_mac_rx(zd_usb_to_hw(usb
), buffer
, length
);
585 static void rx_urb_complete(struct urb
*urb
)
588 struct zd_usb_rx
*rx
;
592 switch (urb
->status
) {
603 dev_dbg_f(urb_dev(urb
), "urb %p error %d\n", urb
, urb
->status
);
607 buffer
= urb
->transfer_buffer
;
608 length
= urb
->actual_length
;
612 if (length
%rx
->usb_packet_size
> rx
->usb_packet_size
-4) {
613 /* If there is an old first fragment, we don't care. */
614 dev_dbg_f(urb_dev(urb
), "*** first fragment ***\n");
615 ZD_ASSERT(length
<= ARRAY_SIZE(rx
->fragment
));
616 spin_lock(&rx
->lock
);
617 memcpy(rx
->fragment
, buffer
, length
);
618 rx
->fragment_length
= length
;
619 spin_unlock(&rx
->lock
);
623 spin_lock(&rx
->lock
);
624 if (rx
->fragment_length
> 0) {
625 /* We are on a second fragment, we believe */
626 ZD_ASSERT(length
+ rx
->fragment_length
<=
627 ARRAY_SIZE(rx
->fragment
));
628 dev_dbg_f(urb_dev(urb
), "*** second fragment ***\n");
629 memcpy(rx
->fragment
+rx
->fragment_length
, buffer
, length
);
630 handle_rx_packet(usb
, rx
->fragment
,
631 rx
->fragment_length
+ length
);
632 rx
->fragment_length
= 0;
633 spin_unlock(&rx
->lock
);
635 spin_unlock(&rx
->lock
);
636 handle_rx_packet(usb
, buffer
, length
);
640 usb_submit_urb(urb
, GFP_ATOMIC
);
643 static struct urb
*alloc_rx_urb(struct zd_usb
*usb
)
645 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
649 urb
= usb_alloc_urb(0, GFP_KERNEL
);
652 buffer
= usb_buffer_alloc(udev
, USB_MAX_RX_SIZE
, GFP_KERNEL
,
659 usb_fill_bulk_urb(urb
, udev
, usb_rcvbulkpipe(udev
, EP_DATA_IN
),
660 buffer
, USB_MAX_RX_SIZE
,
661 rx_urb_complete
, usb
);
662 urb
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
667 static void free_rx_urb(struct urb
*urb
)
671 usb_buffer_free(urb
->dev
, urb
->transfer_buffer_length
,
672 urb
->transfer_buffer
, urb
->transfer_dma
);
676 int zd_usb_enable_rx(struct zd_usb
*usb
)
679 struct zd_usb_rx
*rx
= &usb
->rx
;
682 dev_dbg_f(zd_usb_dev(usb
), "\n");
685 urbs
= kcalloc(RX_URBS_COUNT
, sizeof(struct urb
*), GFP_KERNEL
);
688 for (i
= 0; i
< RX_URBS_COUNT
; i
++) {
689 urbs
[i
] = alloc_rx_urb(usb
);
694 ZD_ASSERT(!irqs_disabled());
695 spin_lock_irq(&rx
->lock
);
697 spin_unlock_irq(&rx
->lock
);
702 rx
->urbs_count
= RX_URBS_COUNT
;
703 spin_unlock_irq(&rx
->lock
);
705 for (i
= 0; i
< RX_URBS_COUNT
; i
++) {
706 r
= usb_submit_urb(urbs
[i
], GFP_KERNEL
);
713 for (i
= 0; i
< RX_URBS_COUNT
; i
++) {
714 usb_kill_urb(urbs
[i
]);
716 spin_lock_irq(&rx
->lock
);
719 spin_unlock_irq(&rx
->lock
);
722 for (i
= 0; i
< RX_URBS_COUNT
; i
++)
723 free_rx_urb(urbs
[i
]);
728 void zd_usb_disable_rx(struct zd_usb
*usb
)
734 struct zd_usb_rx
*rx
= &usb
->rx
;
736 spin_lock_irqsave(&rx
->lock
, flags
);
738 count
= rx
->urbs_count
;
739 spin_unlock_irqrestore(&rx
->lock
, flags
);
743 for (i
= 0; i
< count
; i
++) {
744 usb_kill_urb(urbs
[i
]);
745 free_rx_urb(urbs
[i
]);
749 spin_lock_irqsave(&rx
->lock
, flags
);
752 spin_unlock_irqrestore(&rx
->lock
, flags
);
756 * zd_usb_disable_tx - disable transmission
757 * @usb: the zd1211rw-private USB structure
759 * Frees all URBs in the free list and marks the transmission as disabled.
761 void zd_usb_disable_tx(struct zd_usb
*usb
)
763 struct zd_usb_tx
*tx
= &usb
->tx
;
765 struct list_head
*pos
, *n
;
767 spin_lock_irqsave(&tx
->lock
, flags
);
768 list_for_each_safe(pos
, n
, &tx
->free_urb_list
) {
770 usb_free_urb(list_entry(pos
, struct urb
, urb_list
));
773 tx
->submitted_urbs
= 0;
774 /* The stopped state is ignored, relying on ieee80211_wake_queues()
775 * in a potentionally following zd_usb_enable_tx().
777 spin_unlock_irqrestore(&tx
->lock
, flags
);
781 * zd_usb_enable_tx - enables transmission
782 * @usb: a &struct zd_usb pointer
784 * This function enables transmission and prepares the &zd_usb_tx data
787 void zd_usb_enable_tx(struct zd_usb
*usb
)
790 struct zd_usb_tx
*tx
= &usb
->tx
;
792 spin_lock_irqsave(&tx
->lock
, flags
);
794 tx
->submitted_urbs
= 0;
795 ieee80211_wake_queues(zd_usb_to_hw(usb
));
797 spin_unlock_irqrestore(&tx
->lock
, flags
);
801 * alloc_tx_urb - provides an tx URB
802 * @usb: a &struct zd_usb pointer
804 * Allocates a new URB. If possible takes the urb from the free list in
807 static struct urb
*alloc_tx_urb(struct zd_usb
*usb
)
809 struct zd_usb_tx
*tx
= &usb
->tx
;
811 struct list_head
*entry
;
814 spin_lock_irqsave(&tx
->lock
, flags
);
815 if (list_empty(&tx
->free_urb_list
)) {
816 urb
= usb_alloc_urb(0, GFP_ATOMIC
);
819 entry
= tx
->free_urb_list
.next
;
821 urb
= list_entry(entry
, struct urb
, urb_list
);
823 spin_unlock_irqrestore(&tx
->lock
, flags
);
828 * free_tx_urb - frees a used tx URB
829 * @usb: a &struct zd_usb pointer
830 * @urb: URB to be freed
832 * Frees the the transmission URB, which means to put it on the free URB
835 static void free_tx_urb(struct zd_usb
*usb
, struct urb
*urb
)
837 struct zd_usb_tx
*tx
= &usb
->tx
;
840 spin_lock_irqsave(&tx
->lock
, flags
);
845 list_add(&urb
->urb_list
, &tx
->free_urb_list
);
847 spin_unlock_irqrestore(&tx
->lock
, flags
);
850 static void tx_dec_submitted_urbs(struct zd_usb
*usb
)
852 struct zd_usb_tx
*tx
= &usb
->tx
;
855 spin_lock_irqsave(&tx
->lock
, flags
);
856 --tx
->submitted_urbs
;
857 if (tx
->stopped
&& tx
->submitted_urbs
<= ZD_USB_TX_LOW
) {
858 ieee80211_wake_queues(zd_usb_to_hw(usb
));
861 spin_unlock_irqrestore(&tx
->lock
, flags
);
864 static void tx_inc_submitted_urbs(struct zd_usb
*usb
)
866 struct zd_usb_tx
*tx
= &usb
->tx
;
869 spin_lock_irqsave(&tx
->lock
, flags
);
870 ++tx
->submitted_urbs
;
871 if (!tx
->stopped
&& tx
->submitted_urbs
> ZD_USB_TX_HIGH
) {
872 ieee80211_stop_queues(zd_usb_to_hw(usb
));
875 spin_unlock_irqrestore(&tx
->lock
, flags
);
879 * tx_urb_complete - completes the execution of an URB
882 * This function is called if the URB has been transferred to a device or an
883 * error has happened.
885 static void tx_urb_complete(struct urb
*urb
)
889 struct ieee80211_tx_info
*info
;
892 switch (urb
->status
) {
901 dev_dbg_f(urb_dev(urb
), "urb %p error %d\n", urb
, urb
->status
);
904 dev_dbg_f(urb_dev(urb
), "urb %p error %d\n", urb
, urb
->status
);
908 skb
= (struct sk_buff
*)urb
->context
;
910 * grab 'usb' pointer before handing off the skb (since
911 * it might be freed by zd_mac_tx_to_dev or mac80211)
913 info
= IEEE80211_SKB_CB(skb
);
914 usb
= &zd_hw_mac(info
->rate_driver_data
[0])->chip
.usb
;
915 zd_mac_tx_to_dev(skb
, urb
->status
);
916 free_tx_urb(usb
, urb
);
917 tx_dec_submitted_urbs(usb
);
920 r
= usb_submit_urb(urb
, GFP_ATOMIC
);
922 dev_dbg_f(urb_dev(urb
), "error resubmit urb %p %d\n", urb
, r
);
928 * zd_usb_tx: initiates transfer of a frame of the device
930 * @usb: the zd1211rw-private USB structure
931 * @skb: a &struct sk_buff pointer
933 * This function tranmits a frame to the device. It doesn't wait for
934 * completion. The frame must contain the control set and have all the
935 * control set information available.
937 * The function returns 0 if the transfer has been successfully initiated.
939 int zd_usb_tx(struct zd_usb
*usb
, struct sk_buff
*skb
)
942 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
945 urb
= alloc_tx_urb(usb
);
951 usb_fill_bulk_urb(urb
, udev
, usb_sndbulkpipe(udev
, EP_DATA_OUT
),
952 skb
->data
, skb
->len
, tx_urb_complete
, skb
);
954 r
= usb_submit_urb(urb
, GFP_ATOMIC
);
957 tx_inc_submitted_urbs(usb
);
960 free_tx_urb(usb
, urb
);
965 static inline void init_usb_interrupt(struct zd_usb
*usb
)
967 struct zd_usb_interrupt
*intr
= &usb
->intr
;
969 spin_lock_init(&intr
->lock
);
970 intr
->interval
= int_urb_interval(zd_usb_to_usbdev(usb
));
971 init_completion(&intr
->read_regs
.completion
);
972 intr
->read_regs
.cr_int_addr
= cpu_to_le16((u16
)CR_INTERRUPT
);
975 static inline void init_usb_rx(struct zd_usb
*usb
)
977 struct zd_usb_rx
*rx
= &usb
->rx
;
978 spin_lock_init(&rx
->lock
);
979 if (interface_to_usbdev(usb
->intf
)->speed
== USB_SPEED_HIGH
) {
980 rx
->usb_packet_size
= 512;
982 rx
->usb_packet_size
= 64;
984 ZD_ASSERT(rx
->fragment_length
== 0);
987 static inline void init_usb_tx(struct zd_usb
*usb
)
989 struct zd_usb_tx
*tx
= &usb
->tx
;
990 spin_lock_init(&tx
->lock
);
993 INIT_LIST_HEAD(&tx
->free_urb_list
);
994 tx
->submitted_urbs
= 0;
997 void zd_usb_init(struct zd_usb
*usb
, struct ieee80211_hw
*hw
,
998 struct usb_interface
*intf
)
1000 memset(usb
, 0, sizeof(*usb
));
1001 usb
->intf
= usb_get_intf(intf
);
1002 usb_set_intfdata(usb
->intf
, hw
);
1003 init_usb_interrupt(usb
);
1008 void zd_usb_clear(struct zd_usb
*usb
)
1010 usb_set_intfdata(usb
->intf
, NULL
);
1011 usb_put_intf(usb
->intf
);
1012 ZD_MEMCLEAR(usb
, sizeof(*usb
));
1013 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
1016 static const char *speed(enum usb_device_speed speed
)
1021 case USB_SPEED_FULL
:
1023 case USB_SPEED_HIGH
:
1026 return "unknown speed";
1030 static int scnprint_id(struct usb_device
*udev
, char *buffer
, size_t size
)
1032 return scnprintf(buffer
, size
, "%04hx:%04hx v%04hx %s",
1033 le16_to_cpu(udev
->descriptor
.idVendor
),
1034 le16_to_cpu(udev
->descriptor
.idProduct
),
1035 get_bcdDevice(udev
),
1036 speed(udev
->speed
));
1039 int zd_usb_scnprint_id(struct zd_usb
*usb
, char *buffer
, size_t size
)
1041 struct usb_device
*udev
= interface_to_usbdev(usb
->intf
);
1042 return scnprint_id(udev
, buffer
, size
);
1046 static void print_id(struct usb_device
*udev
)
1050 scnprint_id(udev
, buffer
, sizeof(buffer
));
1051 buffer
[sizeof(buffer
)-1] = 0;
1052 dev_dbg_f(&udev
->dev
, "%s\n", buffer
);
1055 #define print_id(udev) do { } while (0)
1058 static int eject_installer(struct usb_interface
*intf
)
1060 struct usb_device
*udev
= interface_to_usbdev(intf
);
1061 struct usb_host_interface
*iface_desc
= &intf
->altsetting
[0];
1062 struct usb_endpoint_descriptor
*endpoint
;
1067 /* Find bulk out endpoint */
1068 endpoint
= &iface_desc
->endpoint
[1].desc
;
1069 if ((endpoint
->bEndpointAddress
& USB_TYPE_MASK
) == USB_DIR_OUT
&&
1070 usb_endpoint_xfer_bulk(endpoint
)) {
1071 bulk_out_ep
= endpoint
->bEndpointAddress
;
1074 "zd1211rw: Could not find bulk out endpoint\n");
1078 cmd
= kzalloc(31, GFP_KERNEL
);
1082 /* USB bulk command block */
1083 cmd
[0] = 0x55; /* bulk command signature */
1084 cmd
[1] = 0x53; /* bulk command signature */
1085 cmd
[2] = 0x42; /* bulk command signature */
1086 cmd
[3] = 0x43; /* bulk command signature */
1087 cmd
[14] = 6; /* command length */
1089 cmd
[15] = 0x1b; /* SCSI command: START STOP UNIT */
1090 cmd
[19] = 0x2; /* eject disc */
1092 dev_info(&udev
->dev
, "Ejecting virtual installer media...\n");
1093 r
= usb_bulk_msg(udev
, usb_sndbulkpipe(udev
, bulk_out_ep
),
1094 cmd
, 31, NULL
, 2000);
1099 /* At this point, the device disconnects and reconnects with the real
1102 usb_set_intfdata(intf
, NULL
);
1106 int zd_usb_init_hw(struct zd_usb
*usb
)
1109 struct zd_mac
*mac
= zd_usb_to_mac(usb
);
1111 dev_dbg_f(zd_usb_dev(usb
), "\n");
1113 r
= upload_firmware(usb
);
1115 dev_err(zd_usb_dev(usb
),
1116 "couldn't load firmware. Error number %d\n", r
);
1120 r
= usb_reset_configuration(zd_usb_to_usbdev(usb
));
1122 dev_dbg_f(zd_usb_dev(usb
),
1123 "couldn't reset configuration. Error number %d\n", r
);
1127 r
= zd_mac_init_hw(mac
->hw
);
1129 dev_dbg_f(zd_usb_dev(usb
),
1130 "couldn't initialize mac. Error number %d\n", r
);
1134 usb
->initialized
= 1;
1138 static int probe(struct usb_interface
*intf
, const struct usb_device_id
*id
)
1141 struct usb_device
*udev
= interface_to_usbdev(intf
);
1143 struct ieee80211_hw
*hw
= NULL
;
1147 if (id
->driver_info
& DEVICE_INSTALLER
)
1148 return eject_installer(intf
);
1150 switch (udev
->speed
) {
1152 case USB_SPEED_FULL
:
1153 case USB_SPEED_HIGH
:
1156 dev_dbg_f(&intf
->dev
, "Unknown USB speed\n");
1161 r
= usb_reset_device(udev
);
1164 "couldn't reset usb device. Error number %d\n", r
);
1168 hw
= zd_mac_alloc_hw(intf
);
1174 usb
= &zd_hw_mac(hw
)->chip
.usb
;
1175 usb
->is_zd1211b
= (id
->driver_info
== DEVICE_ZD1211B
) != 0;
1177 r
= zd_mac_preinit_hw(hw
);
1179 dev_dbg_f(&intf
->dev
,
1180 "couldn't initialize mac. Error number %d\n", r
);
1184 r
= ieee80211_register_hw(hw
);
1186 dev_dbg_f(&intf
->dev
,
1187 "couldn't register device. Error number %d\n", r
);
1191 dev_dbg_f(&intf
->dev
, "successful\n");
1192 dev_info(&intf
->dev
, "%s\n", wiphy_name(hw
->wiphy
));
1195 usb_reset_device(interface_to_usbdev(intf
));
1197 zd_mac_clear(zd_hw_mac(hw
));
1198 ieee80211_free_hw(hw
);
1203 static void disconnect(struct usb_interface
*intf
)
1205 struct ieee80211_hw
*hw
= zd_intf_to_hw(intf
);
1209 /* Either something really bad happened, or we're just dealing with
1210 * a DEVICE_INSTALLER. */
1214 mac
= zd_hw_mac(hw
);
1215 usb
= &mac
->chip
.usb
;
1217 dev_dbg_f(zd_usb_dev(usb
), "\n");
1219 ieee80211_unregister_hw(hw
);
1221 /* Just in case something has gone wrong! */
1222 zd_usb_disable_rx(usb
);
1223 zd_usb_disable_int(usb
);
1225 /* If the disconnect has been caused by a removal of the
1226 * driver module, the reset allows reloading of the driver. If the
1227 * reset will not be executed here, the upload of the firmware in the
1228 * probe function caused by the reloading of the driver will fail.
1230 usb_reset_device(interface_to_usbdev(intf
));
1233 ieee80211_free_hw(hw
);
1234 dev_dbg(&intf
->dev
, "disconnected\n");
1237 static struct usb_driver driver
= {
1238 .name
= KBUILD_MODNAME
,
1239 .id_table
= usb_ids
,
1241 .disconnect
= disconnect
,
1244 struct workqueue_struct
*zd_workqueue
;
1246 static int __init
usb_init(void)
1250 pr_debug("%s usb_init()\n", driver
.name
);
1252 zd_workqueue
= create_singlethread_workqueue(driver
.name
);
1253 if (zd_workqueue
== NULL
) {
1254 printk(KERN_ERR
"%s couldn't create workqueue\n", driver
.name
);
1258 r
= usb_register(&driver
);
1260 destroy_workqueue(zd_workqueue
);
1261 printk(KERN_ERR
"%s usb_register() failed. Error number %d\n",
1266 pr_debug("%s initialized\n", driver
.name
);
1270 static void __exit
usb_exit(void)
1272 pr_debug("%s usb_exit()\n", driver
.name
);
1273 usb_deregister(&driver
);
1274 destroy_workqueue(zd_workqueue
);
1277 module_init(usb_init
);
1278 module_exit(usb_exit
);
1280 static int usb_int_regs_length(unsigned int count
)
1282 return sizeof(struct usb_int_regs
) + count
* sizeof(struct reg_data
);
1285 static void prepare_read_regs_int(struct zd_usb
*usb
)
1287 struct zd_usb_interrupt
*intr
= &usb
->intr
;
1289 spin_lock_irq(&intr
->lock
);
1290 intr
->read_regs_enabled
= 1;
1291 INIT_COMPLETION(intr
->read_regs
.completion
);
1292 spin_unlock_irq(&intr
->lock
);
1295 static void disable_read_regs_int(struct zd_usb
*usb
)
1297 struct zd_usb_interrupt
*intr
= &usb
->intr
;
1299 spin_lock_irq(&intr
->lock
);
1300 intr
->read_regs_enabled
= 0;
1301 spin_unlock_irq(&intr
->lock
);
1304 static int get_results(struct zd_usb
*usb
, u16
*values
,
1305 struct usb_req_read_regs
*req
, unsigned int count
)
1309 struct zd_usb_interrupt
*intr
= &usb
->intr
;
1310 struct read_regs_int
*rr
= &intr
->read_regs
;
1311 struct usb_int_regs
*regs
= (struct usb_int_regs
*)rr
->buffer
;
1313 spin_lock_irq(&intr
->lock
);
1316 /* The created block size seems to be larger than expected.
1317 * However results appear to be correct.
1319 if (rr
->length
< usb_int_regs_length(count
)) {
1320 dev_dbg_f(zd_usb_dev(usb
),
1321 "error: actual length %d less than expected %d\n",
1322 rr
->length
, usb_int_regs_length(count
));
1325 if (rr
->length
> sizeof(rr
->buffer
)) {
1326 dev_dbg_f(zd_usb_dev(usb
),
1327 "error: actual length %d exceeds buffer size %zu\n",
1328 rr
->length
, sizeof(rr
->buffer
));
1332 for (i
= 0; i
< count
; i
++) {
1333 struct reg_data
*rd
= ®s
->regs
[i
];
1334 if (rd
->addr
!= req
->addr
[i
]) {
1335 dev_dbg_f(zd_usb_dev(usb
),
1336 "rd[%d] addr %#06hx expected %#06hx\n", i
,
1337 le16_to_cpu(rd
->addr
),
1338 le16_to_cpu(req
->addr
[i
]));
1341 values
[i
] = le16_to_cpu(rd
->value
);
1346 spin_unlock_irq(&intr
->lock
);
1350 int zd_usb_ioread16v(struct zd_usb
*usb
, u16
*values
,
1351 const zd_addr_t
*addresses
, unsigned int count
)
1354 int i
, req_len
, actual_req_len
;
1355 struct usb_device
*udev
;
1356 struct usb_req_read_regs
*req
= NULL
;
1357 unsigned long timeout
;
1360 dev_dbg_f(zd_usb_dev(usb
), "error: count is zero\n");
1363 if (count
> USB_MAX_IOREAD16_COUNT
) {
1364 dev_dbg_f(zd_usb_dev(usb
),
1365 "error: count %u exceeds possible max %u\n",
1366 count
, USB_MAX_IOREAD16_COUNT
);
1370 dev_dbg_f(zd_usb_dev(usb
),
1371 "error: io in atomic context not supported\n");
1372 return -EWOULDBLOCK
;
1374 if (!usb_int_enabled(usb
)) {
1375 dev_dbg_f(zd_usb_dev(usb
),
1376 "error: usb interrupt not enabled\n");
1377 return -EWOULDBLOCK
;
1380 req_len
= sizeof(struct usb_req_read_regs
) + count
* sizeof(__le16
);
1381 req
= kmalloc(req_len
, GFP_KERNEL
);
1384 req
->id
= cpu_to_le16(USB_REQ_READ_REGS
);
1385 for (i
= 0; i
< count
; i
++)
1386 req
->addr
[i
] = cpu_to_le16((u16
)addresses
[i
]);
1388 udev
= zd_usb_to_usbdev(usb
);
1389 prepare_read_regs_int(usb
);
1390 r
= usb_bulk_msg(udev
, usb_sndbulkpipe(udev
, EP_REGS_OUT
),
1391 req
, req_len
, &actual_req_len
, 1000 /* ms */);
1393 dev_dbg_f(zd_usb_dev(usb
),
1394 "error in usb_bulk_msg(). Error number %d\n", r
);
1397 if (req_len
!= actual_req_len
) {
1398 dev_dbg_f(zd_usb_dev(usb
), "error in usb_bulk_msg()\n"
1399 " req_len %d != actual_req_len %d\n",
1400 req_len
, actual_req_len
);
1405 timeout
= wait_for_completion_timeout(&usb
->intr
.read_regs
.completion
,
1406 msecs_to_jiffies(1000));
1408 disable_read_regs_int(usb
);
1409 dev_dbg_f(zd_usb_dev(usb
), "read timed out\n");
1414 r
= get_results(usb
, values
, req
, count
);
1420 int zd_usb_iowrite16v(struct zd_usb
*usb
, const struct zd_ioreq16
*ioreqs
,
1424 struct usb_device
*udev
;
1425 struct usb_req_write_regs
*req
= NULL
;
1426 int i
, req_len
, actual_req_len
;
1430 if (count
> USB_MAX_IOWRITE16_COUNT
) {
1431 dev_dbg_f(zd_usb_dev(usb
),
1432 "error: count %u exceeds possible max %u\n",
1433 count
, USB_MAX_IOWRITE16_COUNT
);
1437 dev_dbg_f(zd_usb_dev(usb
),
1438 "error: io in atomic context not supported\n");
1439 return -EWOULDBLOCK
;
1442 req_len
= sizeof(struct usb_req_write_regs
) +
1443 count
* sizeof(struct reg_data
);
1444 req
= kmalloc(req_len
, GFP_KERNEL
);
1448 req
->id
= cpu_to_le16(USB_REQ_WRITE_REGS
);
1449 for (i
= 0; i
< count
; i
++) {
1450 struct reg_data
*rw
= &req
->reg_writes
[i
];
1451 rw
->addr
= cpu_to_le16((u16
)ioreqs
[i
].addr
);
1452 rw
->value
= cpu_to_le16(ioreqs
[i
].value
);
1455 udev
= zd_usb_to_usbdev(usb
);
1456 r
= usb_bulk_msg(udev
, usb_sndbulkpipe(udev
, EP_REGS_OUT
),
1457 req
, req_len
, &actual_req_len
, 1000 /* ms */);
1459 dev_dbg_f(zd_usb_dev(usb
),
1460 "error in usb_bulk_msg(). Error number %d\n", r
);
1463 if (req_len
!= actual_req_len
) {
1464 dev_dbg_f(zd_usb_dev(usb
),
1465 "error in usb_bulk_msg()"
1466 " req_len %d != actual_req_len %d\n",
1467 req_len
, actual_req_len
);
1472 /* FALL-THROUGH with r == 0 */
1478 int zd_usb_rfwrite(struct zd_usb
*usb
, u32 value
, u8 bits
)
1481 struct usb_device
*udev
;
1482 struct usb_req_rfwrite
*req
= NULL
;
1483 int i
, req_len
, actual_req_len
;
1484 u16 bit_value_template
;
1487 dev_dbg_f(zd_usb_dev(usb
),
1488 "error: io in atomic context not supported\n");
1489 return -EWOULDBLOCK
;
1491 if (bits
< USB_MIN_RFWRITE_BIT_COUNT
) {
1492 dev_dbg_f(zd_usb_dev(usb
),
1493 "error: bits %d are smaller than"
1494 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1495 bits
, USB_MIN_RFWRITE_BIT_COUNT
);
1498 if (bits
> USB_MAX_RFWRITE_BIT_COUNT
) {
1499 dev_dbg_f(zd_usb_dev(usb
),
1500 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1501 bits
, USB_MAX_RFWRITE_BIT_COUNT
);
1505 if (value
& (~0UL << bits
)) {
1506 dev_dbg_f(zd_usb_dev(usb
),
1507 "error: value %#09x has bits >= %d set\n",
1513 dev_dbg_f(zd_usb_dev(usb
), "value %#09x bits %d\n", value
, bits
);
1515 r
= zd_usb_ioread16(usb
, &bit_value_template
, CR203
);
1517 dev_dbg_f(zd_usb_dev(usb
),
1518 "error %d: Couldn't read CR203\n", r
);
1521 bit_value_template
&= ~(RF_IF_LE
|RF_CLK
|RF_DATA
);
1523 req_len
= sizeof(struct usb_req_rfwrite
) + bits
* sizeof(__le16
);
1524 req
= kmalloc(req_len
, GFP_KERNEL
);
1528 req
->id
= cpu_to_le16(USB_REQ_WRITE_RF
);
1529 /* 1: 3683a, but not used in ZYDAS driver */
1530 req
->value
= cpu_to_le16(2);
1531 req
->bits
= cpu_to_le16(bits
);
1533 for (i
= 0; i
< bits
; i
++) {
1534 u16 bv
= bit_value_template
;
1535 if (value
& (1 << (bits
-1-i
)))
1537 req
->bit_values
[i
] = cpu_to_le16(bv
);
1540 udev
= zd_usb_to_usbdev(usb
);
1541 r
= usb_bulk_msg(udev
, usb_sndbulkpipe(udev
, EP_REGS_OUT
),
1542 req
, req_len
, &actual_req_len
, 1000 /* ms */);
1544 dev_dbg_f(zd_usb_dev(usb
),
1545 "error in usb_bulk_msg(). Error number %d\n", r
);
1548 if (req_len
!= actual_req_len
) {
1549 dev_dbg_f(zd_usb_dev(usb
), "error in usb_bulk_msg()"
1550 " req_len %d != actual_req_len %d\n",
1551 req_len
, actual_req_len
);
1556 /* FALL-THROUGH with r == 0 */