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/slab.h>
28 #include <linux/skbuff.h>
29 #include <linux/usb.h>
30 #include <linux/workqueue.h>
31 #include <net/mac80211.h>
32 #include <asm/unaligned.h>
38 static struct usb_device_id usb_ids
[] = {
40 { USB_DEVICE(0x0105, 0x145f), .driver_info
= DEVICE_ZD1211
},
41 { USB_DEVICE(0x0586, 0x3401), .driver_info
= DEVICE_ZD1211
},
42 { USB_DEVICE(0x0586, 0x3402), .driver_info
= DEVICE_ZD1211
},
43 { USB_DEVICE(0x0586, 0x3407), .driver_info
= DEVICE_ZD1211
},
44 { USB_DEVICE(0x0586, 0x3409), .driver_info
= DEVICE_ZD1211
},
45 { USB_DEVICE(0x079b, 0x004a), .driver_info
= DEVICE_ZD1211
},
46 { USB_DEVICE(0x07b8, 0x6001), .driver_info
= DEVICE_ZD1211
},
47 { USB_DEVICE(0x0ace, 0x1211), .driver_info
= DEVICE_ZD1211
},
48 { USB_DEVICE(0x0ace, 0xa211), .driver_info
= DEVICE_ZD1211
},
49 { USB_DEVICE(0x0b05, 0x170c), .driver_info
= DEVICE_ZD1211
},
50 { USB_DEVICE(0x0b3b, 0x1630), .driver_info
= DEVICE_ZD1211
},
51 { USB_DEVICE(0x0b3b, 0x5630), .driver_info
= DEVICE_ZD1211
},
52 { USB_DEVICE(0x0df6, 0x9071), .driver_info
= DEVICE_ZD1211
},
53 { USB_DEVICE(0x0df6, 0x9075), .driver_info
= DEVICE_ZD1211
},
54 { USB_DEVICE(0x126f, 0xa006), .driver_info
= DEVICE_ZD1211
},
55 { USB_DEVICE(0x129b, 0x1666), .driver_info
= DEVICE_ZD1211
},
56 { USB_DEVICE(0x13b1, 0x001e), .driver_info
= DEVICE_ZD1211
},
57 { USB_DEVICE(0x1435, 0x0711), .driver_info
= DEVICE_ZD1211
},
58 { USB_DEVICE(0x14ea, 0xab10), .driver_info
= DEVICE_ZD1211
},
59 { USB_DEVICE(0x14ea, 0xab13), .driver_info
= DEVICE_ZD1211
},
60 { USB_DEVICE(0x157e, 0x300a), .driver_info
= DEVICE_ZD1211
},
61 { USB_DEVICE(0x157e, 0x300b), .driver_info
= DEVICE_ZD1211
},
62 { USB_DEVICE(0x157e, 0x3204), .driver_info
= DEVICE_ZD1211
},
63 { USB_DEVICE(0x1740, 0x2000), .driver_info
= DEVICE_ZD1211
},
64 { USB_DEVICE(0x6891, 0xa727), .driver_info
= DEVICE_ZD1211
},
66 { USB_DEVICE(0x0053, 0x5301), .driver_info
= DEVICE_ZD1211B
},
67 { USB_DEVICE(0x0409, 0x0248), .driver_info
= DEVICE_ZD1211B
},
68 { USB_DEVICE(0x0411, 0x00da), .driver_info
= DEVICE_ZD1211B
},
69 { USB_DEVICE(0x0471, 0x1236), .driver_info
= DEVICE_ZD1211B
},
70 { USB_DEVICE(0x0471, 0x1237), .driver_info
= DEVICE_ZD1211B
},
71 { USB_DEVICE(0x050d, 0x705c), .driver_info
= DEVICE_ZD1211B
},
72 { USB_DEVICE(0x054c, 0x0257), .driver_info
= DEVICE_ZD1211B
},
73 { USB_DEVICE(0x0586, 0x340a), .driver_info
= DEVICE_ZD1211B
},
74 { USB_DEVICE(0x0586, 0x340f), .driver_info
= DEVICE_ZD1211B
},
75 { USB_DEVICE(0x0586, 0x3410), .driver_info
= DEVICE_ZD1211B
},
76 { USB_DEVICE(0x0586, 0x3412), .driver_info
= DEVICE_ZD1211B
},
77 { USB_DEVICE(0x0586, 0x3413), .driver_info
= DEVICE_ZD1211B
},
78 { USB_DEVICE(0x079b, 0x0062), .driver_info
= DEVICE_ZD1211B
},
79 { USB_DEVICE(0x07b8, 0x6001), .driver_info
= DEVICE_ZD1211B
},
80 { USB_DEVICE(0x07fa, 0x1196), .driver_info
= DEVICE_ZD1211B
},
81 { USB_DEVICE(0x083a, 0x4505), .driver_info
= DEVICE_ZD1211B
},
82 { USB_DEVICE(0x083a, 0xe501), .driver_info
= DEVICE_ZD1211B
},
83 { USB_DEVICE(0x083a, 0xe503), .driver_info
= DEVICE_ZD1211B
},
84 { USB_DEVICE(0x083a, 0xe506), .driver_info
= DEVICE_ZD1211B
},
85 { USB_DEVICE(0x0ace, 0x1215), .driver_info
= DEVICE_ZD1211B
},
86 { USB_DEVICE(0x0ace, 0xb215), .driver_info
= DEVICE_ZD1211B
},
87 { USB_DEVICE(0x0b05, 0x171b), .driver_info
= DEVICE_ZD1211B
},
88 { USB_DEVICE(0x0baf, 0x0121), .driver_info
= DEVICE_ZD1211B
},
89 { USB_DEVICE(0x0cde, 0x001a), .driver_info
= DEVICE_ZD1211B
},
90 { USB_DEVICE(0x0df6, 0x0036), .driver_info
= DEVICE_ZD1211B
},
91 { USB_DEVICE(0x129b, 0x1667), .driver_info
= DEVICE_ZD1211B
},
92 { USB_DEVICE(0x13b1, 0x0024), .driver_info
= DEVICE_ZD1211B
},
93 { USB_DEVICE(0x157e, 0x300d), .driver_info
= DEVICE_ZD1211B
},
94 { USB_DEVICE(0x1582, 0x6003), .driver_info
= DEVICE_ZD1211B
},
95 { USB_DEVICE(0x2019, 0x5303), .driver_info
= DEVICE_ZD1211B
},
96 { USB_DEVICE(0x2019, 0xed01), .driver_info
= DEVICE_ZD1211B
},
97 /* "Driverless" devices that need ejecting */
98 { USB_DEVICE(0x0ace, 0x2011), .driver_info
= DEVICE_INSTALLER
},
99 { USB_DEVICE(0x0ace, 0x20ff), .driver_info
= DEVICE_INSTALLER
},
103 MODULE_LICENSE("GPL");
104 MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
105 MODULE_AUTHOR("Ulrich Kunitz");
106 MODULE_AUTHOR("Daniel Drake");
107 MODULE_VERSION("1.0");
108 MODULE_DEVICE_TABLE(usb
, usb_ids
);
110 #define FW_ZD1211_PREFIX "zd1211/zd1211_"
111 #define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
113 /* USB device initialization */
114 static void int_urb_complete(struct urb
*urb
);
116 static int request_fw_file(
117 const struct firmware
**fw
, const char *name
, struct device
*device
)
121 dev_dbg_f(device
, "fw name %s\n", name
);
123 r
= request_firmware(fw
, name
, device
);
126 "Could not load firmware file %s. Error number %d\n",
131 static inline u16
get_bcdDevice(const struct usb_device
*udev
)
133 return le16_to_cpu(udev
->descriptor
.bcdDevice
);
136 enum upload_code_flags
{
140 /* Ensures that MAX_TRANSFER_SIZE is even. */
141 #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
143 static int upload_code(struct usb_device
*udev
,
144 const u8
*data
, size_t size
, u16 code_offset
, int flags
)
149 /* USB request blocks need "kmalloced" buffers.
151 p
= kmalloc(MAX_TRANSFER_SIZE
, GFP_KERNEL
);
153 dev_err(&udev
->dev
, "out of memory\n");
160 size_t transfer_size
= size
<= MAX_TRANSFER_SIZE
?
161 size
: MAX_TRANSFER_SIZE
;
163 dev_dbg_f(&udev
->dev
, "transfer size %zu\n", transfer_size
);
165 memcpy(p
, data
, transfer_size
);
166 r
= usb_control_msg(udev
, usb_sndctrlpipe(udev
, 0),
167 USB_REQ_FIRMWARE_DOWNLOAD
,
168 USB_DIR_OUT
| USB_TYPE_VENDOR
,
169 code_offset
, 0, p
, transfer_size
, 1000 /* ms */);
172 "USB control request for firmware upload"
173 " failed. Error number %d\n", r
);
176 transfer_size
= r
& ~1;
178 size
-= transfer_size
;
179 data
+= transfer_size
;
180 code_offset
+= transfer_size
/sizeof(u16
);
183 if (flags
& REBOOT
) {
186 /* Use "DMA-aware" buffer. */
187 r
= usb_control_msg(udev
, usb_rcvctrlpipe(udev
, 0),
188 USB_REQ_FIRMWARE_CONFIRM
,
189 USB_DIR_IN
| USB_TYPE_VENDOR
,
190 0, 0, p
, sizeof(ret
), 5000 /* ms */);
191 if (r
!= sizeof(ret
)) {
193 "control request firmeware confirmation failed."
194 " Return value %d\n", r
);
202 "Internal error while downloading."
203 " Firmware confirm return value %#04x\n",
208 dev_dbg_f(&udev
->dev
, "firmware confirm return value %#04x\n",
218 static u16
get_word(const void *data
, u16 offset
)
220 const __le16
*p
= data
;
221 return le16_to_cpu(p
[offset
]);
224 static char *get_fw_name(struct zd_usb
*usb
, char *buffer
, size_t size
,
227 scnprintf(buffer
, size
, "%s%s",
229 FW_ZD1211B_PREFIX
: FW_ZD1211_PREFIX
,
234 static int handle_version_mismatch(struct zd_usb
*usb
,
235 const struct firmware
*ub_fw
)
237 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
238 const struct firmware
*ur_fw
= NULL
;
243 r
= request_fw_file(&ur_fw
,
244 get_fw_name(usb
, fw_name
, sizeof(fw_name
), "ur"),
249 r
= upload_code(udev
, ur_fw
->data
, ur_fw
->size
, FW_START
, REBOOT
);
253 offset
= (E2P_BOOT_CODE_OFFSET
* sizeof(u16
));
254 r
= upload_code(udev
, ub_fw
->data
+ offset
, ub_fw
->size
- offset
,
255 E2P_START
+ E2P_BOOT_CODE_OFFSET
, REBOOT
);
257 /* At this point, the vendor driver downloads the whole firmware
258 * image, hacks around with version IDs, and uploads it again,
259 * completely overwriting the boot code. We do not do this here as
260 * it is not required on any tested devices, and it is suspected to
263 release_firmware(ur_fw
);
267 static int upload_firmware(struct zd_usb
*usb
)
272 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
273 const struct firmware
*ub_fw
= NULL
;
274 const struct firmware
*uph_fw
= NULL
;
277 bcdDevice
= get_bcdDevice(udev
);
279 r
= request_fw_file(&ub_fw
,
280 get_fw_name(usb
, fw_name
, sizeof(fw_name
), "ub"),
285 fw_bcdDevice
= get_word(ub_fw
->data
, E2P_DATA_OFFSET
);
287 if (fw_bcdDevice
!= bcdDevice
) {
289 "firmware version %#06x and device bootcode version "
290 "%#06x differ\n", fw_bcdDevice
, bcdDevice
);
291 if (bcdDevice
<= 0x4313)
292 dev_warn(&udev
->dev
, "device has old bootcode, please "
293 "report success or failure\n");
295 r
= handle_version_mismatch(usb
, ub_fw
);
299 dev_dbg_f(&udev
->dev
,
300 "firmware device id %#06x is equal to the "
301 "actual device id\n", fw_bcdDevice
);
305 r
= request_fw_file(&uph_fw
,
306 get_fw_name(usb
, fw_name
, sizeof(fw_name
), "uphr"),
311 r
= upload_code(udev
, uph_fw
->data
, uph_fw
->size
, FW_START
, REBOOT
);
314 "Could not upload firmware code uph. Error number %d\n",
320 release_firmware(ub_fw
);
321 release_firmware(uph_fw
);
325 MODULE_FIRMWARE(FW_ZD1211B_PREFIX
"ur");
326 MODULE_FIRMWARE(FW_ZD1211_PREFIX
"ur");
327 MODULE_FIRMWARE(FW_ZD1211B_PREFIX
"ub");
328 MODULE_FIRMWARE(FW_ZD1211_PREFIX
"ub");
329 MODULE_FIRMWARE(FW_ZD1211B_PREFIX
"uphr");
330 MODULE_FIRMWARE(FW_ZD1211_PREFIX
"uphr");
332 /* Read data from device address space using "firmware interface" which does
333 * not require firmware to be loaded. */
334 int zd_usb_read_fw(struct zd_usb
*usb
, zd_addr_t addr
, u8
*data
, u16 len
)
337 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
340 /* Use "DMA-aware" buffer. */
341 buf
= kmalloc(len
, GFP_KERNEL
);
344 r
= usb_control_msg(udev
, usb_rcvctrlpipe(udev
, 0),
345 USB_REQ_FIRMWARE_READ_DATA
, USB_DIR_IN
| 0x40, addr
, 0,
349 "read over firmware interface failed: %d\n", r
);
351 } else if (r
!= len
) {
353 "incomplete read over firmware interface: %d/%d\n",
359 memcpy(data
, buf
, len
);
365 #define urb_dev(urb) (&(urb)->dev->dev)
367 static inline void handle_regs_int(struct urb
*urb
)
369 struct zd_usb
*usb
= urb
->context
;
370 struct zd_usb_interrupt
*intr
= &usb
->intr
;
374 ZD_ASSERT(in_interrupt());
375 spin_lock(&intr
->lock
);
377 int_num
= le16_to_cpu(*(__le16
*)(urb
->transfer_buffer
+2));
378 if (int_num
== CR_INTERRUPT
) {
379 struct zd_mac
*mac
= zd_hw_mac(zd_usb_to_hw(urb
->context
));
380 spin_lock(&mac
->lock
);
381 memcpy(&mac
->intr_buffer
, urb
->transfer_buffer
,
382 USB_MAX_EP_INT_BUFFER
);
383 spin_unlock(&mac
->lock
);
384 schedule_work(&mac
->process_intr
);
385 } else if (intr
->read_regs_enabled
) {
386 intr
->read_regs
.length
= len
= urb
->actual_length
;
388 if (len
> sizeof(intr
->read_regs
.buffer
))
389 len
= sizeof(intr
->read_regs
.buffer
);
390 memcpy(intr
->read_regs
.buffer
, urb
->transfer_buffer
, len
);
391 intr
->read_regs_enabled
= 0;
392 complete(&intr
->read_regs
.completion
);
397 spin_unlock(&intr
->lock
);
400 static void int_urb_complete(struct urb
*urb
)
403 struct usb_int_header
*hdr
;
405 switch (urb
->status
) {
419 if (urb
->actual_length
< sizeof(hdr
)) {
420 dev_dbg_f(urb_dev(urb
), "error: urb %p to small\n", urb
);
424 hdr
= urb
->transfer_buffer
;
425 if (hdr
->type
!= USB_INT_TYPE
) {
426 dev_dbg_f(urb_dev(urb
), "error: urb %p wrong type\n", urb
);
431 case USB_INT_ID_REGS
:
432 handle_regs_int(urb
);
434 case USB_INT_ID_RETRY_FAILED
:
435 zd_mac_tx_failed(urb
);
438 dev_dbg_f(urb_dev(urb
), "error: urb %p unknown id %x\n", urb
,
439 (unsigned int)hdr
->id
);
444 r
= usb_submit_urb(urb
, GFP_ATOMIC
);
446 dev_dbg_f(urb_dev(urb
), "error: resubmit urb %p err code %d\n",
448 /* TODO: add worker to reset intr->urb */
453 static inline int int_urb_interval(struct usb_device
*udev
)
455 switch (udev
->speed
) {
466 static inline int usb_int_enabled(struct zd_usb
*usb
)
469 struct zd_usb_interrupt
*intr
= &usb
->intr
;
472 spin_lock_irqsave(&intr
->lock
, flags
);
474 spin_unlock_irqrestore(&intr
->lock
, flags
);
478 int zd_usb_enable_int(struct zd_usb
*usb
)
481 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
482 struct zd_usb_interrupt
*intr
= &usb
->intr
;
485 dev_dbg_f(zd_usb_dev(usb
), "\n");
487 urb
= usb_alloc_urb(0, GFP_KERNEL
);
493 ZD_ASSERT(!irqs_disabled());
494 spin_lock_irq(&intr
->lock
);
496 spin_unlock_irq(&intr
->lock
);
501 spin_unlock_irq(&intr
->lock
);
504 intr
->buffer
= usb_alloc_coherent(udev
, USB_MAX_EP_INT_BUFFER
,
505 GFP_KERNEL
, &intr
->buffer_dma
);
507 dev_dbg_f(zd_usb_dev(usb
),
508 "couldn't allocate transfer_buffer\n");
509 goto error_set_urb_null
;
512 usb_fill_int_urb(urb
, udev
, usb_rcvintpipe(udev
, EP_INT_IN
),
513 intr
->buffer
, USB_MAX_EP_INT_BUFFER
,
514 int_urb_complete
, usb
,
516 urb
->transfer_dma
= intr
->buffer_dma
;
517 urb
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
519 dev_dbg_f(zd_usb_dev(usb
), "submit urb %p\n", intr
->urb
);
520 r
= usb_submit_urb(urb
, GFP_KERNEL
);
522 dev_dbg_f(zd_usb_dev(usb
),
523 "Couldn't submit urb. Error number %d\n", r
);
529 usb_free_coherent(udev
, USB_MAX_EP_INT_BUFFER
,
530 intr
->buffer
, intr
->buffer_dma
);
532 spin_lock_irq(&intr
->lock
);
534 spin_unlock_irq(&intr
->lock
);
541 void zd_usb_disable_int(struct zd_usb
*usb
)
544 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
545 struct zd_usb_interrupt
*intr
= &usb
->intr
;
548 dma_addr_t buffer_dma
;
550 spin_lock_irqsave(&intr
->lock
, flags
);
553 spin_unlock_irqrestore(&intr
->lock
, flags
);
557 buffer
= intr
->buffer
;
558 buffer_dma
= intr
->buffer_dma
;
560 spin_unlock_irqrestore(&intr
->lock
, flags
);
563 dev_dbg_f(zd_usb_dev(usb
), "urb %p killed\n", urb
);
567 usb_free_coherent(udev
, USB_MAX_EP_INT_BUFFER
,
571 static void handle_rx_packet(struct zd_usb
*usb
, const u8
*buffer
,
575 const struct rx_length_info
*length_info
;
577 if (length
< sizeof(struct rx_length_info
)) {
578 /* It's not a complete packet anyhow. */
579 printk("%s: invalid, small RX packet : %d\n",
583 length_info
= (struct rx_length_info
*)
584 (buffer
+ length
- sizeof(struct rx_length_info
));
586 /* It might be that three frames are merged into a single URB
587 * transaction. We have to check for the length info tag.
589 * While testing we discovered that length_info might be unaligned,
590 * because if USB transactions are merged, the last packet will not
591 * be padded. Unaligned access might also happen if the length_info
592 * structure is not present.
594 if (get_unaligned_le16(&length_info
->tag
) == RX_LENGTH_INFO_TAG
)
596 unsigned int l
, k
, n
;
597 for (i
= 0, l
= 0;; i
++) {
598 k
= get_unaligned_le16(&length_info
->length
[i
]);
604 zd_mac_rx(zd_usb_to_hw(usb
), buffer
+l
, k
);
610 zd_mac_rx(zd_usb_to_hw(usb
), buffer
, length
);
614 static void rx_urb_complete(struct urb
*urb
)
617 struct zd_usb_rx
*rx
;
621 switch (urb
->status
) {
632 dev_dbg_f(urb_dev(urb
), "urb %p error %d\n", urb
, urb
->status
);
636 buffer
= urb
->transfer_buffer
;
637 length
= urb
->actual_length
;
641 if (length
%rx
->usb_packet_size
> rx
->usb_packet_size
-4) {
642 /* If there is an old first fragment, we don't care. */
643 dev_dbg_f(urb_dev(urb
), "*** first fragment ***\n");
644 ZD_ASSERT(length
<= ARRAY_SIZE(rx
->fragment
));
645 spin_lock(&rx
->lock
);
646 memcpy(rx
->fragment
, buffer
, length
);
647 rx
->fragment_length
= length
;
648 spin_unlock(&rx
->lock
);
652 spin_lock(&rx
->lock
);
653 if (rx
->fragment_length
> 0) {
654 /* We are on a second fragment, we believe */
655 ZD_ASSERT(length
+ rx
->fragment_length
<=
656 ARRAY_SIZE(rx
->fragment
));
657 dev_dbg_f(urb_dev(urb
), "*** second fragment ***\n");
658 memcpy(rx
->fragment
+rx
->fragment_length
, buffer
, length
);
659 handle_rx_packet(usb
, rx
->fragment
,
660 rx
->fragment_length
+ length
);
661 rx
->fragment_length
= 0;
662 spin_unlock(&rx
->lock
);
664 spin_unlock(&rx
->lock
);
665 handle_rx_packet(usb
, buffer
, length
);
669 usb_submit_urb(urb
, GFP_ATOMIC
);
672 static struct urb
*alloc_rx_urb(struct zd_usb
*usb
)
674 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
678 urb
= usb_alloc_urb(0, GFP_KERNEL
);
681 buffer
= usb_alloc_coherent(udev
, USB_MAX_RX_SIZE
, GFP_KERNEL
,
688 usb_fill_bulk_urb(urb
, udev
, usb_rcvbulkpipe(udev
, EP_DATA_IN
),
689 buffer
, USB_MAX_RX_SIZE
,
690 rx_urb_complete
, usb
);
691 urb
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
696 static void free_rx_urb(struct urb
*urb
)
700 usb_free_coherent(urb
->dev
, urb
->transfer_buffer_length
,
701 urb
->transfer_buffer
, urb
->transfer_dma
);
705 int zd_usb_enable_rx(struct zd_usb
*usb
)
708 struct zd_usb_rx
*rx
= &usb
->rx
;
711 dev_dbg_f(zd_usb_dev(usb
), "\n");
714 urbs
= kcalloc(RX_URBS_COUNT
, sizeof(struct urb
*), GFP_KERNEL
);
717 for (i
= 0; i
< RX_URBS_COUNT
; i
++) {
718 urbs
[i
] = alloc_rx_urb(usb
);
723 ZD_ASSERT(!irqs_disabled());
724 spin_lock_irq(&rx
->lock
);
726 spin_unlock_irq(&rx
->lock
);
731 rx
->urbs_count
= RX_URBS_COUNT
;
732 spin_unlock_irq(&rx
->lock
);
734 for (i
= 0; i
< RX_URBS_COUNT
; i
++) {
735 r
= usb_submit_urb(urbs
[i
], GFP_KERNEL
);
742 for (i
= 0; i
< RX_URBS_COUNT
; i
++) {
743 usb_kill_urb(urbs
[i
]);
745 spin_lock_irq(&rx
->lock
);
748 spin_unlock_irq(&rx
->lock
);
751 for (i
= 0; i
< RX_URBS_COUNT
; i
++)
752 free_rx_urb(urbs
[i
]);
757 void zd_usb_disable_rx(struct zd_usb
*usb
)
763 struct zd_usb_rx
*rx
= &usb
->rx
;
765 spin_lock_irqsave(&rx
->lock
, flags
);
767 count
= rx
->urbs_count
;
768 spin_unlock_irqrestore(&rx
->lock
, flags
);
772 for (i
= 0; i
< count
; i
++) {
773 usb_kill_urb(urbs
[i
]);
774 free_rx_urb(urbs
[i
]);
778 spin_lock_irqsave(&rx
->lock
, flags
);
781 spin_unlock_irqrestore(&rx
->lock
, flags
);
785 * zd_usb_disable_tx - disable transmission
786 * @usb: the zd1211rw-private USB structure
788 * Frees all URBs in the free list and marks the transmission as disabled.
790 void zd_usb_disable_tx(struct zd_usb
*usb
)
792 struct zd_usb_tx
*tx
= &usb
->tx
;
795 atomic_set(&tx
->enabled
, 0);
797 /* kill all submitted tx-urbs */
798 usb_kill_anchored_urbs(&tx
->submitted
);
800 spin_lock_irqsave(&tx
->lock
, flags
);
801 WARN_ON(!skb_queue_empty(&tx
->submitted_skbs
));
802 WARN_ON(tx
->submitted_urbs
!= 0);
803 tx
->submitted_urbs
= 0;
804 spin_unlock_irqrestore(&tx
->lock
, flags
);
806 /* The stopped state is ignored, relying on ieee80211_wake_queues()
807 * in a potentionally following zd_usb_enable_tx().
812 * zd_usb_enable_tx - enables transmission
813 * @usb: a &struct zd_usb pointer
815 * This function enables transmission and prepares the &zd_usb_tx data
818 void zd_usb_enable_tx(struct zd_usb
*usb
)
821 struct zd_usb_tx
*tx
= &usb
->tx
;
823 spin_lock_irqsave(&tx
->lock
, flags
);
824 atomic_set(&tx
->enabled
, 1);
825 tx
->submitted_urbs
= 0;
826 ieee80211_wake_queues(zd_usb_to_hw(usb
));
828 spin_unlock_irqrestore(&tx
->lock
, flags
);
831 static void tx_dec_submitted_urbs(struct zd_usb
*usb
)
833 struct zd_usb_tx
*tx
= &usb
->tx
;
836 spin_lock_irqsave(&tx
->lock
, flags
);
837 --tx
->submitted_urbs
;
838 if (tx
->stopped
&& tx
->submitted_urbs
<= ZD_USB_TX_LOW
) {
839 ieee80211_wake_queues(zd_usb_to_hw(usb
));
842 spin_unlock_irqrestore(&tx
->lock
, flags
);
845 static void tx_inc_submitted_urbs(struct zd_usb
*usb
)
847 struct zd_usb_tx
*tx
= &usb
->tx
;
850 spin_lock_irqsave(&tx
->lock
, flags
);
851 ++tx
->submitted_urbs
;
852 if (!tx
->stopped
&& tx
->submitted_urbs
> ZD_USB_TX_HIGH
) {
853 ieee80211_stop_queues(zd_usb_to_hw(usb
));
856 spin_unlock_irqrestore(&tx
->lock
, flags
);
860 * tx_urb_complete - completes the execution of an URB
863 * This function is called if the URB has been transferred to a device or an
864 * error has happened.
866 static void tx_urb_complete(struct urb
*urb
)
870 struct ieee80211_tx_info
*info
;
872 struct zd_usb_tx
*tx
;
874 skb
= (struct sk_buff
*)urb
->context
;
875 info
= IEEE80211_SKB_CB(skb
);
877 * grab 'usb' pointer before handing off the skb (since
878 * it might be freed by zd_mac_tx_to_dev or mac80211)
880 usb
= &zd_hw_mac(info
->rate_driver_data
[0])->chip
.usb
;
883 switch (urb
->status
) {
892 dev_dbg_f(urb_dev(urb
), "urb %p error %d\n", urb
, urb
->status
);
895 dev_dbg_f(urb_dev(urb
), "urb %p error %d\n", urb
, urb
->status
);
899 skb_unlink(skb
, &usb
->tx
.submitted_skbs
);
900 zd_mac_tx_to_dev(skb
, urb
->status
);
902 tx_dec_submitted_urbs(usb
);
905 usb_anchor_urb(urb
, &tx
->submitted
);
906 r
= usb_submit_urb(urb
, GFP_ATOMIC
);
908 usb_unanchor_urb(urb
);
909 dev_dbg_f(urb_dev(urb
), "error resubmit urb %p %d\n", urb
, r
);
915 * zd_usb_tx: initiates transfer of a frame of the device
917 * @usb: the zd1211rw-private USB structure
918 * @skb: a &struct sk_buff pointer
920 * This function tranmits a frame to the device. It doesn't wait for
921 * completion. The frame must contain the control set and have all the
922 * control set information available.
924 * The function returns 0 if the transfer has been successfully initiated.
926 int zd_usb_tx(struct zd_usb
*usb
, struct sk_buff
*skb
)
929 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
930 struct usb_device
*udev
= zd_usb_to_usbdev(usb
);
932 struct zd_usb_tx
*tx
= &usb
->tx
;
934 if (!atomic_read(&tx
->enabled
)) {
939 urb
= usb_alloc_urb(0, GFP_ATOMIC
);
945 usb_fill_bulk_urb(urb
, udev
, usb_sndbulkpipe(udev
, EP_DATA_OUT
),
946 skb
->data
, skb
->len
, tx_urb_complete
, skb
);
948 info
->rate_driver_data
[1] = (void *)jiffies
;
949 skb_queue_tail(&tx
->submitted_skbs
, skb
);
950 usb_anchor_urb(urb
, &tx
->submitted
);
952 r
= usb_submit_urb(urb
, GFP_ATOMIC
);
954 usb_unanchor_urb(urb
);
955 skb_unlink(skb
, &tx
->submitted_skbs
);
958 tx_inc_submitted_urbs(usb
);
966 static bool zd_tx_timeout(struct zd_usb
*usb
)
968 struct zd_usb_tx
*tx
= &usb
->tx
;
969 struct sk_buff_head
*q
= &tx
->submitted_skbs
;
970 struct sk_buff
*skb
, *skbnext
;
971 struct ieee80211_tx_info
*info
;
972 unsigned long flags
, trans_start
;
973 bool have_timedout
= false;
975 spin_lock_irqsave(&q
->lock
, flags
);
976 skb_queue_walk_safe(q
, skb
, skbnext
) {
977 info
= IEEE80211_SKB_CB(skb
);
978 trans_start
= (unsigned long)info
->rate_driver_data
[1];
980 if (time_is_before_jiffies(trans_start
+ ZD_TX_TIMEOUT
)) {
981 have_timedout
= true;
985 spin_unlock_irqrestore(&q
->lock
, flags
);
987 return have_timedout
;
990 static void zd_tx_watchdog_handler(struct work_struct
*work
)
993 container_of(work
, struct zd_usb
, tx
.watchdog_work
.work
);
994 struct zd_usb_tx
*tx
= &usb
->tx
;
996 if (!atomic_read(&tx
->enabled
) || !tx
->watchdog_enabled
)
998 if (!zd_tx_timeout(usb
))
1001 /* TX halted, try reset */
1002 dev_warn(zd_usb_dev(usb
), "TX-stall detected, reseting device...");
1004 usb_queue_reset_device(usb
->intf
);
1006 /* reset will stop this worker, don't rearm */
1009 queue_delayed_work(zd_workqueue
, &tx
->watchdog_work
,
1010 ZD_TX_WATCHDOG_INTERVAL
);
1013 void zd_tx_watchdog_enable(struct zd_usb
*usb
)
1015 struct zd_usb_tx
*tx
= &usb
->tx
;
1017 if (!tx
->watchdog_enabled
) {
1018 dev_dbg_f(zd_usb_dev(usb
), "\n");
1019 queue_delayed_work(zd_workqueue
, &tx
->watchdog_work
,
1020 ZD_TX_WATCHDOG_INTERVAL
);
1021 tx
->watchdog_enabled
= 1;
1025 void zd_tx_watchdog_disable(struct zd_usb
*usb
)
1027 struct zd_usb_tx
*tx
= &usb
->tx
;
1029 if (tx
->watchdog_enabled
) {
1030 dev_dbg_f(zd_usb_dev(usb
), "\n");
1031 tx
->watchdog_enabled
= 0;
1032 cancel_delayed_work_sync(&tx
->watchdog_work
);
1036 static inline void init_usb_interrupt(struct zd_usb
*usb
)
1038 struct zd_usb_interrupt
*intr
= &usb
->intr
;
1040 spin_lock_init(&intr
->lock
);
1041 intr
->interval
= int_urb_interval(zd_usb_to_usbdev(usb
));
1042 init_completion(&intr
->read_regs
.completion
);
1043 intr
->read_regs
.cr_int_addr
= cpu_to_le16((u16
)CR_INTERRUPT
);
1046 static inline void init_usb_rx(struct zd_usb
*usb
)
1048 struct zd_usb_rx
*rx
= &usb
->rx
;
1049 spin_lock_init(&rx
->lock
);
1050 if (interface_to_usbdev(usb
->intf
)->speed
== USB_SPEED_HIGH
) {
1051 rx
->usb_packet_size
= 512;
1053 rx
->usb_packet_size
= 64;
1055 ZD_ASSERT(rx
->fragment_length
== 0);
1058 static inline void init_usb_tx(struct zd_usb
*usb
)
1060 struct zd_usb_tx
*tx
= &usb
->tx
;
1061 spin_lock_init(&tx
->lock
);
1062 atomic_set(&tx
->enabled
, 0);
1064 skb_queue_head_init(&tx
->submitted_skbs
);
1065 init_usb_anchor(&tx
->submitted
);
1066 tx
->submitted_urbs
= 0;
1067 tx
->watchdog_enabled
= 0;
1068 INIT_DELAYED_WORK(&tx
->watchdog_work
, zd_tx_watchdog_handler
);
1071 void zd_usb_init(struct zd_usb
*usb
, struct ieee80211_hw
*hw
,
1072 struct usb_interface
*intf
)
1074 memset(usb
, 0, sizeof(*usb
));
1075 usb
->intf
= usb_get_intf(intf
);
1076 usb_set_intfdata(usb
->intf
, hw
);
1077 init_usb_interrupt(usb
);
1082 void zd_usb_clear(struct zd_usb
*usb
)
1084 usb_set_intfdata(usb
->intf
, NULL
);
1085 usb_put_intf(usb
->intf
);
1086 ZD_MEMCLEAR(usb
, sizeof(*usb
));
1087 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
1090 static const char *speed(enum usb_device_speed speed
)
1095 case USB_SPEED_FULL
:
1097 case USB_SPEED_HIGH
:
1100 return "unknown speed";
1104 static int scnprint_id(struct usb_device
*udev
, char *buffer
, size_t size
)
1106 return scnprintf(buffer
, size
, "%04hx:%04hx v%04hx %s",
1107 le16_to_cpu(udev
->descriptor
.idVendor
),
1108 le16_to_cpu(udev
->descriptor
.idProduct
),
1109 get_bcdDevice(udev
),
1110 speed(udev
->speed
));
1113 int zd_usb_scnprint_id(struct zd_usb
*usb
, char *buffer
, size_t size
)
1115 struct usb_device
*udev
= interface_to_usbdev(usb
->intf
);
1116 return scnprint_id(udev
, buffer
, size
);
1120 static void print_id(struct usb_device
*udev
)
1124 scnprint_id(udev
, buffer
, sizeof(buffer
));
1125 buffer
[sizeof(buffer
)-1] = 0;
1126 dev_dbg_f(&udev
->dev
, "%s\n", buffer
);
1129 #define print_id(udev) do { } while (0)
1132 static int eject_installer(struct usb_interface
*intf
)
1134 struct usb_device
*udev
= interface_to_usbdev(intf
);
1135 struct usb_host_interface
*iface_desc
= &intf
->altsetting
[0];
1136 struct usb_endpoint_descriptor
*endpoint
;
1141 /* Find bulk out endpoint */
1142 for (r
= 1; r
>= 0; r
--) {
1143 endpoint
= &iface_desc
->endpoint
[r
].desc
;
1144 if (usb_endpoint_dir_out(endpoint
) &&
1145 usb_endpoint_xfer_bulk(endpoint
)) {
1146 bulk_out_ep
= endpoint
->bEndpointAddress
;
1152 "zd1211rw: Could not find bulk out endpoint\n");
1156 cmd
= kzalloc(31, GFP_KERNEL
);
1160 /* USB bulk command block */
1161 cmd
[0] = 0x55; /* bulk command signature */
1162 cmd
[1] = 0x53; /* bulk command signature */
1163 cmd
[2] = 0x42; /* bulk command signature */
1164 cmd
[3] = 0x43; /* bulk command signature */
1165 cmd
[14] = 6; /* command length */
1167 cmd
[15] = 0x1b; /* SCSI command: START STOP UNIT */
1168 cmd
[19] = 0x2; /* eject disc */
1170 dev_info(&udev
->dev
, "Ejecting virtual installer media...\n");
1171 r
= usb_bulk_msg(udev
, usb_sndbulkpipe(udev
, bulk_out_ep
),
1172 cmd
, 31, NULL
, 2000);
1177 /* At this point, the device disconnects and reconnects with the real
1180 usb_set_intfdata(intf
, NULL
);
1184 int zd_usb_init_hw(struct zd_usb
*usb
)
1187 struct zd_mac
*mac
= zd_usb_to_mac(usb
);
1189 dev_dbg_f(zd_usb_dev(usb
), "\n");
1191 r
= upload_firmware(usb
);
1193 dev_err(zd_usb_dev(usb
),
1194 "couldn't load firmware. Error number %d\n", r
);
1198 r
= usb_reset_configuration(zd_usb_to_usbdev(usb
));
1200 dev_dbg_f(zd_usb_dev(usb
),
1201 "couldn't reset configuration. Error number %d\n", r
);
1205 r
= zd_mac_init_hw(mac
->hw
);
1207 dev_dbg_f(zd_usb_dev(usb
),
1208 "couldn't initialize mac. Error number %d\n", r
);
1212 usb
->initialized
= 1;
1216 static int probe(struct usb_interface
*intf
, const struct usb_device_id
*id
)
1219 struct usb_device
*udev
= interface_to_usbdev(intf
);
1221 struct ieee80211_hw
*hw
= NULL
;
1225 if (id
->driver_info
& DEVICE_INSTALLER
)
1226 return eject_installer(intf
);
1228 switch (udev
->speed
) {
1230 case USB_SPEED_FULL
:
1231 case USB_SPEED_HIGH
:
1234 dev_dbg_f(&intf
->dev
, "Unknown USB speed\n");
1239 r
= usb_reset_device(udev
);
1242 "couldn't reset usb device. Error number %d\n", r
);
1246 hw
= zd_mac_alloc_hw(intf
);
1252 usb
= &zd_hw_mac(hw
)->chip
.usb
;
1253 usb
->is_zd1211b
= (id
->driver_info
== DEVICE_ZD1211B
) != 0;
1255 r
= zd_mac_preinit_hw(hw
);
1257 dev_dbg_f(&intf
->dev
,
1258 "couldn't initialize mac. Error number %d\n", r
);
1262 r
= ieee80211_register_hw(hw
);
1264 dev_dbg_f(&intf
->dev
,
1265 "couldn't register device. Error number %d\n", r
);
1269 dev_dbg_f(&intf
->dev
, "successful\n");
1270 dev_info(&intf
->dev
, "%s\n", wiphy_name(hw
->wiphy
));
1273 usb_reset_device(interface_to_usbdev(intf
));
1275 zd_mac_clear(zd_hw_mac(hw
));
1276 ieee80211_free_hw(hw
);
1281 static void disconnect(struct usb_interface
*intf
)
1283 struct ieee80211_hw
*hw
= zd_intf_to_hw(intf
);
1287 /* Either something really bad happened, or we're just dealing with
1288 * a DEVICE_INSTALLER. */
1292 mac
= zd_hw_mac(hw
);
1293 usb
= &mac
->chip
.usb
;
1295 dev_dbg_f(zd_usb_dev(usb
), "\n");
1297 ieee80211_unregister_hw(hw
);
1299 /* Just in case something has gone wrong! */
1300 zd_usb_disable_tx(usb
);
1301 zd_usb_disable_rx(usb
);
1302 zd_usb_disable_int(usb
);
1304 /* If the disconnect has been caused by a removal of the
1305 * driver module, the reset allows reloading of the driver. If the
1306 * reset will not be executed here, the upload of the firmware in the
1307 * probe function caused by the reloading of the driver will fail.
1309 usb_reset_device(interface_to_usbdev(intf
));
1312 ieee80211_free_hw(hw
);
1313 dev_dbg(&intf
->dev
, "disconnected\n");
1316 static void zd_usb_resume(struct zd_usb
*usb
)
1318 struct zd_mac
*mac
= zd_usb_to_mac(usb
);
1321 dev_dbg_f(zd_usb_dev(usb
), "\n");
1323 r
= zd_op_start(zd_usb_to_hw(usb
));
1325 dev_warn(zd_usb_dev(usb
), "Device resume failed "
1326 "with error code %d. Retrying...\n", r
);
1327 if (usb
->was_running
)
1328 set_bit(ZD_DEVICE_RUNNING
, &mac
->flags
);
1329 usb_queue_reset_device(usb
->intf
);
1333 if (mac
->type
!= NL80211_IFTYPE_UNSPECIFIED
) {
1334 r
= zd_restore_settings(mac
);
1336 dev_dbg(zd_usb_dev(usb
),
1337 "failed to restore settings, %d\n", r
);
1343 static void zd_usb_stop(struct zd_usb
*usb
)
1345 dev_dbg_f(zd_usb_dev(usb
), "\n");
1347 zd_op_stop(zd_usb_to_hw(usb
));
1349 zd_usb_disable_tx(usb
);
1350 zd_usb_disable_rx(usb
);
1351 zd_usb_disable_int(usb
);
1353 usb
->initialized
= 0;
1356 static int pre_reset(struct usb_interface
*intf
)
1358 struct ieee80211_hw
*hw
= usb_get_intfdata(intf
);
1362 if (!hw
|| intf
->condition
!= USB_INTERFACE_BOUND
)
1365 mac
= zd_hw_mac(hw
);
1366 usb
= &mac
->chip
.usb
;
1368 usb
->was_running
= test_bit(ZD_DEVICE_RUNNING
, &mac
->flags
);
1372 mutex_lock(&mac
->chip
.mutex
);
1376 static int post_reset(struct usb_interface
*intf
)
1378 struct ieee80211_hw
*hw
= usb_get_intfdata(intf
);
1382 if (!hw
|| intf
->condition
!= USB_INTERFACE_BOUND
)
1385 mac
= zd_hw_mac(hw
);
1386 usb
= &mac
->chip
.usb
;
1388 mutex_unlock(&mac
->chip
.mutex
);
1390 if (usb
->was_running
)
1395 static struct usb_driver driver
= {
1396 .name
= KBUILD_MODNAME
,
1397 .id_table
= usb_ids
,
1399 .disconnect
= disconnect
,
1400 .pre_reset
= pre_reset
,
1401 .post_reset
= post_reset
,
1404 struct workqueue_struct
*zd_workqueue
;
1406 static int __init
usb_init(void)
1410 pr_debug("%s usb_init()\n", driver
.name
);
1412 zd_workqueue
= create_singlethread_workqueue(driver
.name
);
1413 if (zd_workqueue
== NULL
) {
1414 printk(KERN_ERR
"%s couldn't create workqueue\n", driver
.name
);
1418 r
= usb_register(&driver
);
1420 destroy_workqueue(zd_workqueue
);
1421 printk(KERN_ERR
"%s usb_register() failed. Error number %d\n",
1426 pr_debug("%s initialized\n", driver
.name
);
1430 static void __exit
usb_exit(void)
1432 pr_debug("%s usb_exit()\n", driver
.name
);
1433 usb_deregister(&driver
);
1434 destroy_workqueue(zd_workqueue
);
1437 module_init(usb_init
);
1438 module_exit(usb_exit
);
1440 static int usb_int_regs_length(unsigned int count
)
1442 return sizeof(struct usb_int_regs
) + count
* sizeof(struct reg_data
);
1445 static void prepare_read_regs_int(struct zd_usb
*usb
)
1447 struct zd_usb_interrupt
*intr
= &usb
->intr
;
1449 spin_lock_irq(&intr
->lock
);
1450 intr
->read_regs_enabled
= 1;
1451 INIT_COMPLETION(intr
->read_regs
.completion
);
1452 spin_unlock_irq(&intr
->lock
);
1455 static void disable_read_regs_int(struct zd_usb
*usb
)
1457 struct zd_usb_interrupt
*intr
= &usb
->intr
;
1459 spin_lock_irq(&intr
->lock
);
1460 intr
->read_regs_enabled
= 0;
1461 spin_unlock_irq(&intr
->lock
);
1464 static int get_results(struct zd_usb
*usb
, u16
*values
,
1465 struct usb_req_read_regs
*req
, unsigned int count
)
1469 struct zd_usb_interrupt
*intr
= &usb
->intr
;
1470 struct read_regs_int
*rr
= &intr
->read_regs
;
1471 struct usb_int_regs
*regs
= (struct usb_int_regs
*)rr
->buffer
;
1473 spin_lock_irq(&intr
->lock
);
1476 /* The created block size seems to be larger than expected.
1477 * However results appear to be correct.
1479 if (rr
->length
< usb_int_regs_length(count
)) {
1480 dev_dbg_f(zd_usb_dev(usb
),
1481 "error: actual length %d less than expected %d\n",
1482 rr
->length
, usb_int_regs_length(count
));
1485 if (rr
->length
> sizeof(rr
->buffer
)) {
1486 dev_dbg_f(zd_usb_dev(usb
),
1487 "error: actual length %d exceeds buffer size %zu\n",
1488 rr
->length
, sizeof(rr
->buffer
));
1492 for (i
= 0; i
< count
; i
++) {
1493 struct reg_data
*rd
= ®s
->regs
[i
];
1494 if (rd
->addr
!= req
->addr
[i
]) {
1495 dev_dbg_f(zd_usb_dev(usb
),
1496 "rd[%d] addr %#06hx expected %#06hx\n", i
,
1497 le16_to_cpu(rd
->addr
),
1498 le16_to_cpu(req
->addr
[i
]));
1501 values
[i
] = le16_to_cpu(rd
->value
);
1506 spin_unlock_irq(&intr
->lock
);
1510 int zd_usb_ioread16v(struct zd_usb
*usb
, u16
*values
,
1511 const zd_addr_t
*addresses
, unsigned int count
)
1514 int i
, req_len
, actual_req_len
;
1515 struct usb_device
*udev
;
1516 struct usb_req_read_regs
*req
= NULL
;
1517 unsigned long timeout
;
1520 dev_dbg_f(zd_usb_dev(usb
), "error: count is zero\n");
1523 if (count
> USB_MAX_IOREAD16_COUNT
) {
1524 dev_dbg_f(zd_usb_dev(usb
),
1525 "error: count %u exceeds possible max %u\n",
1526 count
, USB_MAX_IOREAD16_COUNT
);
1530 dev_dbg_f(zd_usb_dev(usb
),
1531 "error: io in atomic context not supported\n");
1532 return -EWOULDBLOCK
;
1534 if (!usb_int_enabled(usb
)) {
1535 dev_dbg_f(zd_usb_dev(usb
),
1536 "error: usb interrupt not enabled\n");
1537 return -EWOULDBLOCK
;
1540 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb
)->mutex
));
1541 BUILD_BUG_ON(sizeof(struct usb_req_read_regs
) + USB_MAX_IOREAD16_COUNT
*
1542 sizeof(__le16
) > sizeof(usb
->req_buf
));
1543 BUG_ON(sizeof(struct usb_req_read_regs
) + count
* sizeof(__le16
) >
1544 sizeof(usb
->req_buf
));
1546 req_len
= sizeof(struct usb_req_read_regs
) + count
* sizeof(__le16
);
1547 req
= (void *)usb
->req_buf
;
1549 req
->id
= cpu_to_le16(USB_REQ_READ_REGS
);
1550 for (i
= 0; i
< count
; i
++)
1551 req
->addr
[i
] = cpu_to_le16((u16
)addresses
[i
]);
1553 udev
= zd_usb_to_usbdev(usb
);
1554 prepare_read_regs_int(usb
);
1555 r
= usb_bulk_msg(udev
, usb_sndbulkpipe(udev
, EP_REGS_OUT
),
1556 req
, req_len
, &actual_req_len
, 50 /* ms */);
1558 dev_dbg_f(zd_usb_dev(usb
),
1559 "error in usb_bulk_msg(). Error number %d\n", r
);
1562 if (req_len
!= actual_req_len
) {
1563 dev_dbg_f(zd_usb_dev(usb
), "error in usb_bulk_msg()\n"
1564 " req_len %d != actual_req_len %d\n",
1565 req_len
, actual_req_len
);
1570 timeout
= wait_for_completion_timeout(&usb
->intr
.read_regs
.completion
,
1571 msecs_to_jiffies(50));
1573 disable_read_regs_int(usb
);
1574 dev_dbg_f(zd_usb_dev(usb
), "read timed out\n");
1579 r
= get_results(usb
, values
, req
, count
);
1584 int zd_usb_iowrite16v(struct zd_usb
*usb
, const struct zd_ioreq16
*ioreqs
,
1588 struct usb_device
*udev
;
1589 struct usb_req_write_regs
*req
= NULL
;
1590 int i
, req_len
, actual_req_len
;
1594 if (count
> USB_MAX_IOWRITE16_COUNT
) {
1595 dev_dbg_f(zd_usb_dev(usb
),
1596 "error: count %u exceeds possible max %u\n",
1597 count
, USB_MAX_IOWRITE16_COUNT
);
1601 dev_dbg_f(zd_usb_dev(usb
),
1602 "error: io in atomic context not supported\n");
1603 return -EWOULDBLOCK
;
1606 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb
)->mutex
));
1607 BUILD_BUG_ON(sizeof(struct usb_req_write_regs
) +
1608 USB_MAX_IOWRITE16_COUNT
* sizeof(struct reg_data
) >
1609 sizeof(usb
->req_buf
));
1610 BUG_ON(sizeof(struct usb_req_write_regs
) +
1611 count
* sizeof(struct reg_data
) >
1612 sizeof(usb
->req_buf
));
1614 req_len
= sizeof(struct usb_req_write_regs
) +
1615 count
* sizeof(struct reg_data
);
1616 req
= (void *)usb
->req_buf
;
1618 req
->id
= cpu_to_le16(USB_REQ_WRITE_REGS
);
1619 for (i
= 0; i
< count
; i
++) {
1620 struct reg_data
*rw
= &req
->reg_writes
[i
];
1621 rw
->addr
= cpu_to_le16((u16
)ioreqs
[i
].addr
);
1622 rw
->value
= cpu_to_le16(ioreqs
[i
].value
);
1625 udev
= zd_usb_to_usbdev(usb
);
1626 r
= usb_bulk_msg(udev
, usb_sndbulkpipe(udev
, EP_REGS_OUT
),
1627 req
, req_len
, &actual_req_len
, 50 /* ms */);
1629 dev_dbg_f(zd_usb_dev(usb
),
1630 "error in usb_bulk_msg(). Error number %d\n", r
);
1633 if (req_len
!= actual_req_len
) {
1634 dev_dbg_f(zd_usb_dev(usb
),
1635 "error in usb_bulk_msg()"
1636 " req_len %d != actual_req_len %d\n",
1637 req_len
, actual_req_len
);
1642 /* FALL-THROUGH with r == 0 */
1647 int zd_usb_rfwrite(struct zd_usb
*usb
, u32 value
, u8 bits
)
1650 struct usb_device
*udev
;
1651 struct usb_req_rfwrite
*req
= NULL
;
1652 int i
, req_len
, actual_req_len
;
1653 u16 bit_value_template
;
1656 dev_dbg_f(zd_usb_dev(usb
),
1657 "error: io in atomic context not supported\n");
1658 return -EWOULDBLOCK
;
1660 if (bits
< USB_MIN_RFWRITE_BIT_COUNT
) {
1661 dev_dbg_f(zd_usb_dev(usb
),
1662 "error: bits %d are smaller than"
1663 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1664 bits
, USB_MIN_RFWRITE_BIT_COUNT
);
1667 if (bits
> USB_MAX_RFWRITE_BIT_COUNT
) {
1668 dev_dbg_f(zd_usb_dev(usb
),
1669 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1670 bits
, USB_MAX_RFWRITE_BIT_COUNT
);
1674 if (value
& (~0UL << bits
)) {
1675 dev_dbg_f(zd_usb_dev(usb
),
1676 "error: value %#09x has bits >= %d set\n",
1682 dev_dbg_f(zd_usb_dev(usb
), "value %#09x bits %d\n", value
, bits
);
1684 r
= zd_usb_ioread16(usb
, &bit_value_template
, CR203
);
1686 dev_dbg_f(zd_usb_dev(usb
),
1687 "error %d: Couldn't read CR203\n", r
);
1690 bit_value_template
&= ~(RF_IF_LE
|RF_CLK
|RF_DATA
);
1692 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb
)->mutex
));
1693 BUILD_BUG_ON(sizeof(struct usb_req_rfwrite
) +
1694 USB_MAX_RFWRITE_BIT_COUNT
* sizeof(__le16
) >
1695 sizeof(usb
->req_buf
));
1696 BUG_ON(sizeof(struct usb_req_rfwrite
) + bits
* sizeof(__le16
) >
1697 sizeof(usb
->req_buf
));
1699 req_len
= sizeof(struct usb_req_rfwrite
) + bits
* sizeof(__le16
);
1700 req
= (void *)usb
->req_buf
;
1702 req
->id
= cpu_to_le16(USB_REQ_WRITE_RF
);
1703 /* 1: 3683a, but not used in ZYDAS driver */
1704 req
->value
= cpu_to_le16(2);
1705 req
->bits
= cpu_to_le16(bits
);
1707 for (i
= 0; i
< bits
; i
++) {
1708 u16 bv
= bit_value_template
;
1709 if (value
& (1 << (bits
-1-i
)))
1711 req
->bit_values
[i
] = cpu_to_le16(bv
);
1714 udev
= zd_usb_to_usbdev(usb
);
1715 r
= usb_bulk_msg(udev
, usb_sndbulkpipe(udev
, EP_REGS_OUT
),
1716 req
, req_len
, &actual_req_len
, 50 /* ms */);
1718 dev_dbg_f(zd_usb_dev(usb
),
1719 "error in usb_bulk_msg(). Error number %d\n", r
);
1722 if (req_len
!= actual_req_len
) {
1723 dev_dbg_f(zd_usb_dev(usb
), "error in usb_bulk_msg()"
1724 " req_len %d != actual_req_len %d\n",
1725 req_len
, actual_req_len
);
1730 /* FALL-THROUGH with r == 0 */