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) {
414 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
417 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
421 if (urb->actual_length < sizeof(hdr)) {
422 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
426 hdr = urb->transfer_buffer;
427 if (hdr->type != USB_INT_TYPE) {
428 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
433 case USB_INT_ID_REGS:
434 handle_regs_int(urb);
436 case USB_INT_ID_RETRY_FAILED:
437 zd_mac_tx_failed(urb);
440 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
441 (unsigned int)hdr->id);
446 r = usb_submit_urb(urb, GFP_ATOMIC);
448 dev_dbg_f(urb_dev(urb), "error: resubmit urb %p err code %d\n",
450 /* TODO: add worker to reset intr->urb */
455 static inline int int_urb_interval(struct usb_device *udev)
457 switch (udev->speed) {
468 static inline int usb_int_enabled(struct zd_usb *usb)
471 struct zd_usb_interrupt *intr = &usb->intr;
474 spin_lock_irqsave(&intr->lock, flags);
476 spin_unlock_irqrestore(&intr->lock, flags);
480 int zd_usb_enable_int(struct zd_usb *usb)
483 struct usb_device *udev = zd_usb_to_usbdev(usb);
484 struct zd_usb_interrupt *intr = &usb->intr;
487 dev_dbg_f(zd_usb_dev(usb), "\n");
489 urb = usb_alloc_urb(0, GFP_KERNEL);
495 ZD_ASSERT(!irqs_disabled());
496 spin_lock_irq(&intr->lock);
498 spin_unlock_irq(&intr->lock);
503 spin_unlock_irq(&intr->lock);
506 intr->buffer = usb_alloc_coherent(udev, USB_MAX_EP_INT_BUFFER,
507 GFP_KERNEL, &intr->buffer_dma);
509 dev_dbg_f(zd_usb_dev(usb),
510 "couldn't allocate transfer_buffer\n");
511 goto error_set_urb_null;
514 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
515 intr->buffer, USB_MAX_EP_INT_BUFFER,
516 int_urb_complete, usb,
518 urb->transfer_dma = intr->buffer_dma;
519 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
521 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
522 r = usb_submit_urb(urb, GFP_KERNEL);
524 dev_dbg_f(zd_usb_dev(usb),
525 "Couldn't submit urb. Error number %d\n", r);
531 usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER,
532 intr->buffer, intr->buffer_dma);
534 spin_lock_irq(&intr->lock);
536 spin_unlock_irq(&intr->lock);
543 void zd_usb_disable_int(struct zd_usb *usb)
546 struct usb_device *udev = zd_usb_to_usbdev(usb);
547 struct zd_usb_interrupt *intr = &usb->intr;
550 dma_addr_t buffer_dma;
552 spin_lock_irqsave(&intr->lock, flags);
555 spin_unlock_irqrestore(&intr->lock, flags);
559 buffer = intr->buffer;
560 buffer_dma = intr->buffer_dma;
562 spin_unlock_irqrestore(&intr->lock, flags);
565 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
569 usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER,
573 static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
577 const struct rx_length_info *length_info;
579 if (length < sizeof(struct rx_length_info)) {
580 /* It's not a complete packet anyhow. */
581 printk("%s: invalid, small RX packet : %d\n",
585 length_info = (struct rx_length_info *)
586 (buffer + length - sizeof(struct rx_length_info));
588 /* It might be that three frames are merged into a single URB
589 * transaction. We have to check for the length info tag.
591 * While testing we discovered that length_info might be unaligned,
592 * because if USB transactions are merged, the last packet will not
593 * be padded. Unaligned access might also happen if the length_info
594 * structure is not present.
596 if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG)
598 unsigned int l, k, n;
599 for (i = 0, l = 0;; i++) {
600 k = get_unaligned_le16(&length_info->length[i]);
606 zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k);
612 zd_mac_rx(zd_usb_to_hw(usb), buffer, length);
616 static void rx_urb_complete(struct urb *urb)
620 struct zd_usb_rx *rx;
624 switch (urb->status) {
633 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
636 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
640 buffer = urb->transfer_buffer;
641 length = urb->actual_length;
645 zd_usb_reset_rx_idle_timer(usb);
647 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
648 /* If there is an old first fragment, we don't care. */
649 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
650 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
651 spin_lock(&rx->lock);
652 memcpy(rx->fragment, buffer, length);
653 rx->fragment_length = length;
654 spin_unlock(&rx->lock);
658 spin_lock(&rx->lock);
659 if (rx->fragment_length > 0) {
660 /* We are on a second fragment, we believe */
661 ZD_ASSERT(length + rx->fragment_length <=
662 ARRAY_SIZE(rx->fragment));
663 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
664 memcpy(rx->fragment+rx->fragment_length, buffer, length);
665 handle_rx_packet(usb, rx->fragment,
666 rx->fragment_length + length);
667 rx->fragment_length = 0;
668 spin_unlock(&rx->lock);
670 spin_unlock(&rx->lock);
671 handle_rx_packet(usb, buffer, length);
675 r = usb_submit_urb(urb, GFP_ATOMIC);
677 dev_dbg_f(urb_dev(urb), "urb %p resubmit error %d\n", urb, r);
680 static struct urb *alloc_rx_urb(struct zd_usb *usb)
682 struct usb_device *udev = zd_usb_to_usbdev(usb);
686 urb = usb_alloc_urb(0, GFP_KERNEL);
689 buffer = usb_alloc_coherent(udev, USB_MAX_RX_SIZE, GFP_KERNEL,
696 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
697 buffer, USB_MAX_RX_SIZE,
698 rx_urb_complete, usb);
699 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
704 static void free_rx_urb(struct urb *urb)
708 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
709 urb->transfer_buffer, urb->transfer_dma);
713 static int __zd_usb_enable_rx(struct zd_usb *usb)
716 struct zd_usb_rx *rx = &usb->rx;
719 dev_dbg_f(zd_usb_dev(usb), "\n");
722 urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL);
725 for (i = 0; i < RX_URBS_COUNT; i++) {
726 urbs[i] = alloc_rx_urb(usb);
731 ZD_ASSERT(!irqs_disabled());
732 spin_lock_irq(&rx->lock);
734 spin_unlock_irq(&rx->lock);
739 rx->urbs_count = RX_URBS_COUNT;
740 spin_unlock_irq(&rx->lock);
742 for (i = 0; i < RX_URBS_COUNT; i++) {
743 r = usb_submit_urb(urbs[i], GFP_KERNEL);
750 for (i = 0; i < RX_URBS_COUNT; i++) {
751 usb_kill_urb(urbs[i]);
753 spin_lock_irq(&rx->lock);
756 spin_unlock_irq(&rx->lock);
759 for (i = 0; i < RX_URBS_COUNT; i++)
760 free_rx_urb(urbs[i]);
765 int zd_usb_enable_rx(struct zd_usb *usb)
768 struct zd_usb_rx *rx = &usb->rx;
770 mutex_lock(&rx->setup_mutex);
771 r = __zd_usb_enable_rx(usb);
772 mutex_unlock(&rx->setup_mutex);
774 zd_usb_reset_rx_idle_timer(usb);
779 static void __zd_usb_disable_rx(struct zd_usb *usb)
785 struct zd_usb_rx *rx = &usb->rx;
787 spin_lock_irqsave(&rx->lock, flags);
789 count = rx->urbs_count;
790 spin_unlock_irqrestore(&rx->lock, flags);
794 for (i = 0; i < count; i++) {
795 usb_kill_urb(urbs[i]);
796 free_rx_urb(urbs[i]);
800 spin_lock_irqsave(&rx->lock, flags);
803 spin_unlock_irqrestore(&rx->lock, flags);
806 void zd_usb_disable_rx(struct zd_usb *usb)
808 struct zd_usb_rx *rx = &usb->rx;
810 mutex_lock(&rx->setup_mutex);
811 __zd_usb_disable_rx(usb);
812 mutex_unlock(&rx->setup_mutex);
814 cancel_delayed_work_sync(&rx->idle_work);
817 static void zd_usb_reset_rx(struct zd_usb *usb)
820 struct zd_usb_rx *rx = &usb->rx;
823 mutex_lock(&rx->setup_mutex);
825 spin_lock_irqsave(&rx->lock, flags);
826 do_reset = rx->urbs != NULL;
827 spin_unlock_irqrestore(&rx->lock, flags);
830 __zd_usb_disable_rx(usb);
831 __zd_usb_enable_rx(usb);
834 mutex_unlock(&rx->setup_mutex);
837 zd_usb_reset_rx_idle_timer(usb);
841 * zd_usb_disable_tx - disable transmission
842 * @usb: the zd1211rw-private USB structure
844 * Frees all URBs in the free list and marks the transmission as disabled.
846 void zd_usb_disable_tx(struct zd_usb *usb)
848 struct zd_usb_tx *tx = &usb->tx;
851 atomic_set(&tx->enabled, 0);
853 /* kill all submitted tx-urbs */
854 usb_kill_anchored_urbs(&tx->submitted);
856 spin_lock_irqsave(&tx->lock, flags);
857 WARN_ON(!skb_queue_empty(&tx->submitted_skbs));
858 WARN_ON(tx->submitted_urbs != 0);
859 tx->submitted_urbs = 0;
860 spin_unlock_irqrestore(&tx->lock, flags);
862 /* The stopped state is ignored, relying on ieee80211_wake_queues()
863 * in a potentionally following zd_usb_enable_tx().
868 * zd_usb_enable_tx - enables transmission
869 * @usb: a &struct zd_usb pointer
871 * This function enables transmission and prepares the &zd_usb_tx data
874 void zd_usb_enable_tx(struct zd_usb *usb)
877 struct zd_usb_tx *tx = &usb->tx;
879 spin_lock_irqsave(&tx->lock, flags);
880 atomic_set(&tx->enabled, 1);
881 tx->submitted_urbs = 0;
882 ieee80211_wake_queues(zd_usb_to_hw(usb));
884 spin_unlock_irqrestore(&tx->lock, flags);
887 static void tx_dec_submitted_urbs(struct zd_usb *usb)
889 struct zd_usb_tx *tx = &usb->tx;
892 spin_lock_irqsave(&tx->lock, flags);
893 --tx->submitted_urbs;
894 if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) {
895 ieee80211_wake_queues(zd_usb_to_hw(usb));
898 spin_unlock_irqrestore(&tx->lock, flags);
901 static void tx_inc_submitted_urbs(struct zd_usb *usb)
903 struct zd_usb_tx *tx = &usb->tx;
906 spin_lock_irqsave(&tx->lock, flags);
907 ++tx->submitted_urbs;
908 if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) {
909 ieee80211_stop_queues(zd_usb_to_hw(usb));
912 spin_unlock_irqrestore(&tx->lock, flags);
916 * tx_urb_complete - completes the execution of an URB
919 * This function is called if the URB has been transferred to a device or an
920 * error has happened.
922 static void tx_urb_complete(struct urb *urb)
926 struct ieee80211_tx_info *info;
928 struct zd_usb_tx *tx;
930 skb = (struct sk_buff *)urb->context;
931 info = IEEE80211_SKB_CB(skb);
933 * grab 'usb' pointer before handing off the skb (since
934 * it might be freed by zd_mac_tx_to_dev or mac80211)
936 usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb;
939 switch (urb->status) {
948 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
951 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
955 skb_unlink(skb, &usb->tx.submitted_skbs);
956 zd_mac_tx_to_dev(skb, urb->status);
958 tx_dec_submitted_urbs(usb);
961 usb_anchor_urb(urb, &tx->submitted);
962 r = usb_submit_urb(urb, GFP_ATOMIC);
964 usb_unanchor_urb(urb);
965 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
971 * zd_usb_tx: initiates transfer of a frame of the device
973 * @usb: the zd1211rw-private USB structure
974 * @skb: a &struct sk_buff pointer
976 * This function tranmits a frame to the device. It doesn't wait for
977 * completion. The frame must contain the control set and have all the
978 * control set information available.
980 * The function returns 0 if the transfer has been successfully initiated.
982 int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb)
985 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
986 struct usb_device *udev = zd_usb_to_usbdev(usb);
988 struct zd_usb_tx *tx = &usb->tx;
990 if (!atomic_read(&tx->enabled)) {
995 urb = usb_alloc_urb(0, GFP_ATOMIC);
1001 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
1002 skb->data, skb->len, tx_urb_complete, skb);
1004 info->rate_driver_data[1] = (void *)jiffies;
1005 skb_queue_tail(&tx->submitted_skbs, skb);
1006 usb_anchor_urb(urb, &tx->submitted);
1008 r = usb_submit_urb(urb, GFP_ATOMIC);
1010 dev_dbg_f(zd_usb_dev(usb), "error submit urb %p %d\n", urb, r);
1011 usb_unanchor_urb(urb);
1012 skb_unlink(skb, &tx->submitted_skbs);
1015 tx_inc_submitted_urbs(usb);
1023 static bool zd_tx_timeout(struct zd_usb *usb)
1025 struct zd_usb_tx *tx = &usb->tx;
1026 struct sk_buff_head *q = &tx->submitted_skbs;
1027 struct sk_buff *skb, *skbnext;
1028 struct ieee80211_tx_info *info;
1029 unsigned long flags, trans_start;
1030 bool have_timedout = false;
1032 spin_lock_irqsave(&q->lock, flags);
1033 skb_queue_walk_safe(q, skb, skbnext) {
1034 info = IEEE80211_SKB_CB(skb);
1035 trans_start = (unsigned long)info->rate_driver_data[1];
1037 if (time_is_before_jiffies(trans_start + ZD_TX_TIMEOUT)) {
1038 have_timedout = true;
1042 spin_unlock_irqrestore(&q->lock, flags);
1044 return have_timedout;
1047 static void zd_tx_watchdog_handler(struct work_struct *work)
1049 struct zd_usb *usb =
1050 container_of(work, struct zd_usb, tx.watchdog_work.work);
1051 struct zd_usb_tx *tx = &usb->tx;
1053 if (!atomic_read(&tx->enabled) || !tx->watchdog_enabled)
1055 if (!zd_tx_timeout(usb))
1058 /* TX halted, try reset */
1059 dev_warn(zd_usb_dev(usb), "TX-stall detected, reseting device...");
1061 usb_queue_reset_device(usb->intf);
1063 /* reset will stop this worker, don't rearm */
1066 queue_delayed_work(zd_workqueue, &tx->watchdog_work,
1067 ZD_TX_WATCHDOG_INTERVAL);
1070 void zd_tx_watchdog_enable(struct zd_usb *usb)
1072 struct zd_usb_tx *tx = &usb->tx;
1074 if (!tx->watchdog_enabled) {
1075 dev_dbg_f(zd_usb_dev(usb), "\n");
1076 queue_delayed_work(zd_workqueue, &tx->watchdog_work,
1077 ZD_TX_WATCHDOG_INTERVAL);
1078 tx->watchdog_enabled = 1;
1082 void zd_tx_watchdog_disable(struct zd_usb *usb)
1084 struct zd_usb_tx *tx = &usb->tx;
1086 if (tx->watchdog_enabled) {
1087 dev_dbg_f(zd_usb_dev(usb), "\n");
1088 tx->watchdog_enabled = 0;
1089 cancel_delayed_work_sync(&tx->watchdog_work);
1093 static void zd_rx_idle_timer_handler(struct work_struct *work)
1095 struct zd_usb *usb =
1096 container_of(work, struct zd_usb, rx.idle_work.work);
1097 struct zd_mac *mac = zd_usb_to_mac(usb);
1099 if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags))
1102 dev_dbg_f(zd_usb_dev(usb), "\n");
1104 /* 30 seconds since last rx, reset rx */
1105 zd_usb_reset_rx(usb);
1108 void zd_usb_reset_rx_idle_timer(struct zd_usb *usb)
1110 struct zd_usb_rx *rx = &usb->rx;
1112 cancel_delayed_work(&rx->idle_work);
1113 queue_delayed_work(zd_workqueue, &rx->idle_work, ZD_RX_IDLE_INTERVAL);
1116 static inline void init_usb_interrupt(struct zd_usb *usb)
1118 struct zd_usb_interrupt *intr = &usb->intr;
1120 spin_lock_init(&intr->lock);
1121 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
1122 init_completion(&intr->read_regs.completion);
1123 intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT);
1126 static inline void init_usb_rx(struct zd_usb *usb)
1128 struct zd_usb_rx *rx = &usb->rx;
1129 spin_lock_init(&rx->lock);
1130 mutex_init(&rx->setup_mutex);
1131 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
1132 rx->usb_packet_size = 512;
1134 rx->usb_packet_size = 64;
1136 ZD_ASSERT(rx->fragment_length == 0);
1137 INIT_DELAYED_WORK(&rx->idle_work, zd_rx_idle_timer_handler);
1140 static inline void init_usb_tx(struct zd_usb *usb)
1142 struct zd_usb_tx *tx = &usb->tx;
1143 spin_lock_init(&tx->lock);
1144 atomic_set(&tx->enabled, 0);
1146 skb_queue_head_init(&tx->submitted_skbs);
1147 init_usb_anchor(&tx->submitted);
1148 tx->submitted_urbs = 0;
1149 tx->watchdog_enabled = 0;
1150 INIT_DELAYED_WORK(&tx->watchdog_work, zd_tx_watchdog_handler);
1153 void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
1154 struct usb_interface *intf)
1156 memset(usb, 0, sizeof(*usb));
1157 usb->intf = usb_get_intf(intf);
1158 usb_set_intfdata(usb->intf, hw);
1159 init_usb_interrupt(usb);
1164 void zd_usb_clear(struct zd_usb *usb)
1166 usb_set_intfdata(usb->intf, NULL);
1167 usb_put_intf(usb->intf);
1168 ZD_MEMCLEAR(usb, sizeof(*usb));
1169 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
1172 static const char *speed(enum usb_device_speed speed)
1177 case USB_SPEED_FULL:
1179 case USB_SPEED_HIGH:
1182 return "unknown speed";
1186 static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
1188 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
1189 le16_to_cpu(udev->descriptor.idVendor),
1190 le16_to_cpu(udev->descriptor.idProduct),
1191 get_bcdDevice(udev),
1192 speed(udev->speed));
1195 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
1197 struct usb_device *udev = interface_to_usbdev(usb->intf);
1198 return scnprint_id(udev, buffer, size);
1202 static void print_id(struct usb_device *udev)
1206 scnprint_id(udev, buffer, sizeof(buffer));
1207 buffer[sizeof(buffer)-1] = 0;
1208 dev_dbg_f(&udev->dev, "%s\n", buffer);
1211 #define print_id(udev) do { } while (0)
1214 static int eject_installer(struct usb_interface *intf)
1216 struct usb_device *udev = interface_to_usbdev(intf);
1217 struct usb_host_interface *iface_desc = &intf->altsetting[0];
1218 struct usb_endpoint_descriptor *endpoint;
1223 /* Find bulk out endpoint */
1224 for (r = 1; r >= 0; r--) {
1225 endpoint = &iface_desc->endpoint[r].desc;
1226 if (usb_endpoint_dir_out(endpoint) &&
1227 usb_endpoint_xfer_bulk(endpoint)) {
1228 bulk_out_ep = endpoint->bEndpointAddress;
1234 "zd1211rw: Could not find bulk out endpoint\n");
1238 cmd = kzalloc(31, GFP_KERNEL);
1242 /* USB bulk command block */
1243 cmd[0] = 0x55; /* bulk command signature */
1244 cmd[1] = 0x53; /* bulk command signature */
1245 cmd[2] = 0x42; /* bulk command signature */
1246 cmd[3] = 0x43; /* bulk command signature */
1247 cmd[14] = 6; /* command length */
1249 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1250 cmd[19] = 0x2; /* eject disc */
1252 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
1253 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1254 cmd, 31, NULL, 2000);
1259 /* At this point, the device disconnects and reconnects with the real
1262 usb_set_intfdata(intf, NULL);
1266 int zd_usb_init_hw(struct zd_usb *usb)
1269 struct zd_mac *mac = zd_usb_to_mac(usb);
1271 dev_dbg_f(zd_usb_dev(usb), "\n");
1273 r = upload_firmware(usb);
1275 dev_err(zd_usb_dev(usb),
1276 "couldn't load firmware. Error number %d\n", r);
1280 r = usb_reset_configuration(zd_usb_to_usbdev(usb));
1282 dev_dbg_f(zd_usb_dev(usb),
1283 "couldn't reset configuration. Error number %d\n", r);
1287 r = zd_mac_init_hw(mac->hw);
1289 dev_dbg_f(zd_usb_dev(usb),
1290 "couldn't initialize mac. Error number %d\n", r);
1294 usb->initialized = 1;
1298 static int probe(struct usb_interface *intf, const struct usb_device_id *id)
1301 struct usb_device *udev = interface_to_usbdev(intf);
1303 struct ieee80211_hw *hw = NULL;
1307 if (id->driver_info & DEVICE_INSTALLER)
1308 return eject_installer(intf);
1310 switch (udev->speed) {
1312 case USB_SPEED_FULL:
1313 case USB_SPEED_HIGH:
1316 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
1321 r = usb_reset_device(udev);
1324 "couldn't reset usb device. Error number %d\n", r);
1328 hw = zd_mac_alloc_hw(intf);
1334 usb = &zd_hw_mac(hw)->chip.usb;
1335 usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0;
1337 r = zd_mac_preinit_hw(hw);
1339 dev_dbg_f(&intf->dev,
1340 "couldn't initialize mac. Error number %d\n", r);
1344 r = ieee80211_register_hw(hw);
1346 dev_dbg_f(&intf->dev,
1347 "couldn't register device. Error number %d\n", r);
1351 dev_dbg_f(&intf->dev, "successful\n");
1352 dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy));
1355 usb_reset_device(interface_to_usbdev(intf));
1357 zd_mac_clear(zd_hw_mac(hw));
1358 ieee80211_free_hw(hw);
1363 static void disconnect(struct usb_interface *intf)
1365 struct ieee80211_hw *hw = zd_intf_to_hw(intf);
1369 /* Either something really bad happened, or we're just dealing with
1370 * a DEVICE_INSTALLER. */
1374 mac = zd_hw_mac(hw);
1375 usb = &mac->chip.usb;
1377 dev_dbg_f(zd_usb_dev(usb), "\n");
1379 ieee80211_unregister_hw(hw);
1381 /* Just in case something has gone wrong! */
1382 zd_usb_disable_tx(usb);
1383 zd_usb_disable_rx(usb);
1384 zd_usb_disable_int(usb);
1386 /* If the disconnect has been caused by a removal of the
1387 * driver module, the reset allows reloading of the driver. If the
1388 * reset will not be executed here, the upload of the firmware in the
1389 * probe function caused by the reloading of the driver will fail.
1391 usb_reset_device(interface_to_usbdev(intf));
1394 ieee80211_free_hw(hw);
1395 dev_dbg(&intf->dev, "disconnected\n");
1398 static void zd_usb_resume(struct zd_usb *usb)
1400 struct zd_mac *mac = zd_usb_to_mac(usb);
1403 dev_dbg_f(zd_usb_dev(usb), "\n");
1405 r = zd_op_start(zd_usb_to_hw(usb));
1407 dev_warn(zd_usb_dev(usb), "Device resume failed "
1408 "with error code %d. Retrying...\n", r);
1409 if (usb->was_running)
1410 set_bit(ZD_DEVICE_RUNNING, &mac->flags);
1411 usb_queue_reset_device(usb->intf);
1415 if (mac->type != NL80211_IFTYPE_UNSPECIFIED) {
1416 r = zd_restore_settings(mac);
1418 dev_dbg(zd_usb_dev(usb),
1419 "failed to restore settings, %d\n", r);
1425 static void zd_usb_stop(struct zd_usb *usb)
1427 dev_dbg_f(zd_usb_dev(usb), "\n");
1429 zd_op_stop(zd_usb_to_hw(usb));
1431 zd_usb_disable_tx(usb);
1432 zd_usb_disable_rx(usb);
1433 zd_usb_disable_int(usb);
1435 usb->initialized = 0;
1438 static int pre_reset(struct usb_interface *intf)
1440 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1444 if (!hw || intf->condition != USB_INTERFACE_BOUND)
1447 mac = zd_hw_mac(hw);
1448 usb = &mac->chip.usb;
1450 usb->was_running = test_bit(ZD_DEVICE_RUNNING, &mac->flags);
1454 mutex_lock(&mac->chip.mutex);
1458 static int post_reset(struct usb_interface *intf)
1460 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1464 if (!hw || intf->condition != USB_INTERFACE_BOUND)
1467 mac = zd_hw_mac(hw);
1468 usb = &mac->chip.usb;
1470 mutex_unlock(&mac->chip.mutex);
1472 if (usb->was_running)
1477 static struct usb_driver driver = {
1478 .name = KBUILD_MODNAME,
1479 .id_table = usb_ids,
1481 .disconnect = disconnect,
1482 .pre_reset = pre_reset,
1483 .post_reset = post_reset,
1486 struct workqueue_struct *zd_workqueue;
1488 static int __init usb_init(void)
1492 pr_debug("%s usb_init()\n", driver.name);
1494 zd_workqueue = create_singlethread_workqueue(driver.name);
1495 if (zd_workqueue == NULL) {
1496 printk(KERN_ERR "%s couldn't create workqueue\n", driver.name);
1500 r = usb_register(&driver);
1502 destroy_workqueue(zd_workqueue);
1503 printk(KERN_ERR "%s usb_register() failed. Error number %d\n",
1508 pr_debug("%s initialized\n", driver.name);
1512 static void __exit usb_exit(void)
1514 pr_debug("%s usb_exit()\n", driver.name);
1515 usb_deregister(&driver);
1516 destroy_workqueue(zd_workqueue);
1519 module_init(usb_init);
1520 module_exit(usb_exit);
1522 static int usb_int_regs_length(unsigned int count)
1524 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1527 static void prepare_read_regs_int(struct zd_usb *usb)
1529 struct zd_usb_interrupt *intr = &usb->intr;
1531 spin_lock_irq(&intr->lock);
1532 intr->read_regs_enabled = 1;
1533 INIT_COMPLETION(intr->read_regs.completion);
1534 spin_unlock_irq(&intr->lock);
1537 static void disable_read_regs_int(struct zd_usb *usb)
1539 struct zd_usb_interrupt *intr = &usb->intr;
1541 spin_lock_irq(&intr->lock);
1542 intr->read_regs_enabled = 0;
1543 spin_unlock_irq(&intr->lock);
1546 static int get_results(struct zd_usb *usb, u16 *values,
1547 struct usb_req_read_regs *req, unsigned int count)
1551 struct zd_usb_interrupt *intr = &usb->intr;
1552 struct read_regs_int *rr = &intr->read_regs;
1553 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1555 spin_lock_irq(&intr->lock);
1558 /* The created block size seems to be larger than expected.
1559 * However results appear to be correct.
1561 if (rr->length < usb_int_regs_length(count)) {
1562 dev_dbg_f(zd_usb_dev(usb),
1563 "error: actual length %d less than expected %d\n",
1564 rr->length, usb_int_regs_length(count));
1567 if (rr->length > sizeof(rr->buffer)) {
1568 dev_dbg_f(zd_usb_dev(usb),
1569 "error: actual length %d exceeds buffer size %zu\n",
1570 rr->length, sizeof(rr->buffer));
1574 for (i = 0; i < count; i++) {
1575 struct reg_data *rd = ®s->regs[i];
1576 if (rd->addr != req->addr[i]) {
1577 dev_dbg_f(zd_usb_dev(usb),
1578 "rd[%d] addr %#06hx expected %#06hx\n", i,
1579 le16_to_cpu(rd->addr),
1580 le16_to_cpu(req->addr[i]));
1583 values[i] = le16_to_cpu(rd->value);
1588 spin_unlock_irq(&intr->lock);
1592 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1593 const zd_addr_t *addresses, unsigned int count)
1596 int i, req_len, actual_req_len;
1597 struct usb_device *udev;
1598 struct usb_req_read_regs *req = NULL;
1599 unsigned long timeout;
1602 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1605 if (count > USB_MAX_IOREAD16_COUNT) {
1606 dev_dbg_f(zd_usb_dev(usb),
1607 "error: count %u exceeds possible max %u\n",
1608 count, USB_MAX_IOREAD16_COUNT);
1612 dev_dbg_f(zd_usb_dev(usb),
1613 "error: io in atomic context not supported\n");
1614 return -EWOULDBLOCK;
1616 if (!usb_int_enabled(usb)) {
1617 dev_dbg_f(zd_usb_dev(usb),
1618 "error: usb interrupt not enabled\n");
1619 return -EWOULDBLOCK;
1622 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1623 BUILD_BUG_ON(sizeof(struct usb_req_read_regs) + USB_MAX_IOREAD16_COUNT *
1624 sizeof(__le16) > sizeof(usb->req_buf));
1625 BUG_ON(sizeof(struct usb_req_read_regs) + count * sizeof(__le16) >
1626 sizeof(usb->req_buf));
1628 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1629 req = (void *)usb->req_buf;
1631 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1632 for (i = 0; i < count; i++)
1633 req->addr[i] = cpu_to_le16((u16)addresses[i]);
1635 udev = zd_usb_to_usbdev(usb);
1636 prepare_read_regs_int(usb);
1637 r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT),
1638 req, req_len, &actual_req_len, 50 /* ms */);
1640 dev_dbg_f(zd_usb_dev(usb),
1641 "error in usb_interrupt_msg(). Error number %d\n", r);
1644 if (req_len != actual_req_len) {
1645 dev_dbg_f(zd_usb_dev(usb), "error in usb_interrupt_msg()\n"
1646 " req_len %d != actual_req_len %d\n",
1647 req_len, actual_req_len);
1652 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1653 msecs_to_jiffies(50));
1655 disable_read_regs_int(usb);
1656 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1661 r = get_results(usb, values, req, count);
1666 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1670 struct usb_device *udev;
1671 struct usb_req_write_regs *req = NULL;
1672 int i, req_len, actual_req_len;
1676 if (count > USB_MAX_IOWRITE16_COUNT) {
1677 dev_dbg_f(zd_usb_dev(usb),
1678 "error: count %u exceeds possible max %u\n",
1679 count, USB_MAX_IOWRITE16_COUNT);
1683 dev_dbg_f(zd_usb_dev(usb),
1684 "error: io in atomic context not supported\n");
1685 return -EWOULDBLOCK;
1688 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1689 BUILD_BUG_ON(sizeof(struct usb_req_write_regs) +
1690 USB_MAX_IOWRITE16_COUNT * sizeof(struct reg_data) >
1691 sizeof(usb->req_buf));
1692 BUG_ON(sizeof(struct usb_req_write_regs) +
1693 count * sizeof(struct reg_data) >
1694 sizeof(usb->req_buf));
1696 req_len = sizeof(struct usb_req_write_regs) +
1697 count * sizeof(struct reg_data);
1698 req = (void *)usb->req_buf;
1700 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1701 for (i = 0; i < count; i++) {
1702 struct reg_data *rw = &req->reg_writes[i];
1703 rw->addr = cpu_to_le16((u16)ioreqs[i].addr);
1704 rw->value = cpu_to_le16(ioreqs[i].value);
1707 udev = zd_usb_to_usbdev(usb);
1708 r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT),
1709 req, req_len, &actual_req_len, 50 /* ms */);
1711 dev_dbg_f(zd_usb_dev(usb),
1712 "error in usb_interrupt_msg(). Error number %d\n", r);
1715 if (req_len != actual_req_len) {
1716 dev_dbg_f(zd_usb_dev(usb),
1717 "error in usb_interrupt_msg()"
1718 " req_len %d != actual_req_len %d\n",
1719 req_len, actual_req_len);
1724 /* FALL-THROUGH with r == 0 */
1729 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1732 struct usb_device *udev;
1733 struct usb_req_rfwrite *req = NULL;
1734 int i, req_len, actual_req_len;
1735 u16 bit_value_template;
1738 dev_dbg_f(zd_usb_dev(usb),
1739 "error: io in atomic context not supported\n");
1740 return -EWOULDBLOCK;
1742 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1743 dev_dbg_f(zd_usb_dev(usb),
1744 "error: bits %d are smaller than"
1745 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1746 bits, USB_MIN_RFWRITE_BIT_COUNT);
1749 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1750 dev_dbg_f(zd_usb_dev(usb),
1751 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1752 bits, USB_MAX_RFWRITE_BIT_COUNT);
1756 if (value & (~0UL << bits)) {
1757 dev_dbg_f(zd_usb_dev(usb),
1758 "error: value %#09x has bits >= %d set\n",
1764 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1766 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1768 dev_dbg_f(zd_usb_dev(usb),
1769 "error %d: Couldn't read CR203\n", r);
1772 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1774 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1775 BUILD_BUG_ON(sizeof(struct usb_req_rfwrite) +
1776 USB_MAX_RFWRITE_BIT_COUNT * sizeof(__le16) >
1777 sizeof(usb->req_buf));
1778 BUG_ON(sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16) >
1779 sizeof(usb->req_buf));
1781 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1782 req = (void *)usb->req_buf;
1784 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1785 /* 1: 3683a, but not used in ZYDAS driver */
1786 req->value = cpu_to_le16(2);
1787 req->bits = cpu_to_le16(bits);
1789 for (i = 0; i < bits; i++) {
1790 u16 bv = bit_value_template;
1791 if (value & (1 << (bits-1-i)))
1793 req->bit_values[i] = cpu_to_le16(bv);
1796 udev = zd_usb_to_usbdev(usb);
1797 r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT),
1798 req, req_len, &actual_req_len, 50 /* ms */);
1800 dev_dbg_f(zd_usb_dev(usb),
1801 "error in usb_interrupt_msg(). Error number %d\n", r);
1804 if (req_len != actual_req_len) {
1805 dev_dbg_f(zd_usb_dev(usb), "error in usb_interrupt_msg()"
1806 " req_len %d != actual_req_len %d\n",
1807 req_len, actual_req_len);
1812 /* FALL-THROUGH with r == 0 */