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(0x157e, 0x3207), .driver_info = DEVICE_ZD1211 },
64 { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 },
65 { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 },
67 { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B },
68 { USB_DEVICE(0x0409, 0x0248), .driver_info = DEVICE_ZD1211B },
69 { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B },
70 { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B },
71 { USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B },
72 { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B },
73 { USB_DEVICE(0x054c, 0x0257), .driver_info = DEVICE_ZD1211B },
74 { USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B },
75 { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B },
76 { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B },
77 { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B },
78 { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B },
79 { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
80 { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211B },
81 { USB_DEVICE(0x07fa, 0x1196), .driver_info = DEVICE_ZD1211B },
82 { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B },
83 { USB_DEVICE(0x083a, 0xe501), .driver_info = DEVICE_ZD1211B },
84 { USB_DEVICE(0x083a, 0xe503), .driver_info = DEVICE_ZD1211B },
85 { USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B },
86 { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
87 { USB_DEVICE(0x0ace, 0xb215), .driver_info = DEVICE_ZD1211B },
88 { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B },
89 { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B },
90 { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B },
91 { USB_DEVICE(0x0df6, 0x0036), .driver_info = DEVICE_ZD1211B },
92 { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B },
93 { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B },
94 { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
95 { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
96 { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B },
97 { USB_DEVICE(0x2019, 0xed01), .driver_info = DEVICE_ZD1211B },
98 /* "Driverless" devices that need ejecting */
99 { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
100 { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER },
104 MODULE_LICENSE("GPL");
105 MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
106 MODULE_AUTHOR("Ulrich Kunitz");
107 MODULE_AUTHOR("Daniel Drake");
108 MODULE_VERSION("1.0");
109 MODULE_DEVICE_TABLE(usb, usb_ids);
111 #define FW_ZD1211_PREFIX "zd1211/zd1211_"
112 #define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
114 /* USB device initialization */
115 static void int_urb_complete(struct urb *urb);
117 static int request_fw_file(
118 const struct firmware **fw, const char *name, struct device *device)
122 dev_dbg_f(device, "fw name %s\n", name);
124 r = request_firmware(fw, name, device);
127 "Could not load firmware file %s. Error number %d\n",
132 static inline u16 get_bcdDevice(const struct usb_device *udev)
134 return le16_to_cpu(udev->descriptor.bcdDevice);
137 enum upload_code_flags {
141 /* Ensures that MAX_TRANSFER_SIZE is even. */
142 #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
144 static int upload_code(struct usb_device *udev,
145 const u8 *data, size_t size, u16 code_offset, int flags)
150 /* USB request blocks need "kmalloced" buffers.
152 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
154 dev_err(&udev->dev, "out of memory\n");
161 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
162 size : MAX_TRANSFER_SIZE;
164 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
166 memcpy(p, data, transfer_size);
167 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
168 USB_REQ_FIRMWARE_DOWNLOAD,
169 USB_DIR_OUT | USB_TYPE_VENDOR,
170 code_offset, 0, p, transfer_size, 1000 /* ms */);
173 "USB control request for firmware upload"
174 " failed. Error number %d\n", r);
177 transfer_size = r & ~1;
179 size -= transfer_size;
180 data += transfer_size;
181 code_offset += transfer_size/sizeof(u16);
184 if (flags & REBOOT) {
187 /* Use "DMA-aware" buffer. */
188 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
189 USB_REQ_FIRMWARE_CONFIRM,
190 USB_DIR_IN | USB_TYPE_VENDOR,
191 0, 0, p, sizeof(ret), 5000 /* ms */);
192 if (r != sizeof(ret)) {
194 "control request firmeware confirmation failed."
195 " Return value %d\n", r);
203 "Internal error while downloading."
204 " Firmware confirm return value %#04x\n",
209 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
219 static u16 get_word(const void *data, u16 offset)
221 const __le16 *p = data;
222 return le16_to_cpu(p[offset]);
225 static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size,
228 scnprintf(buffer, size, "%s%s",
230 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
235 static int handle_version_mismatch(struct zd_usb *usb,
236 const struct firmware *ub_fw)
238 struct usb_device *udev = zd_usb_to_usbdev(usb);
239 const struct firmware *ur_fw = NULL;
244 r = request_fw_file(&ur_fw,
245 get_fw_name(usb, fw_name, sizeof(fw_name), "ur"),
250 r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT);
254 offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16));
255 r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
256 E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT);
258 /* At this point, the vendor driver downloads the whole firmware
259 * image, hacks around with version IDs, and uploads it again,
260 * completely overwriting the boot code. We do not do this here as
261 * it is not required on any tested devices, and it is suspected to
264 release_firmware(ur_fw);
268 static int upload_firmware(struct zd_usb *usb)
273 struct usb_device *udev = zd_usb_to_usbdev(usb);
274 const struct firmware *ub_fw = NULL;
275 const struct firmware *uph_fw = NULL;
278 bcdDevice = get_bcdDevice(udev);
280 r = request_fw_file(&ub_fw,
281 get_fw_name(usb, fw_name, sizeof(fw_name), "ub"),
286 fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET);
288 if (fw_bcdDevice != bcdDevice) {
290 "firmware version %#06x and device bootcode version "
291 "%#06x differ\n", fw_bcdDevice, bcdDevice);
292 if (bcdDevice <= 0x4313)
293 dev_warn(&udev->dev, "device has old bootcode, please "
294 "report success or failure\n");
296 r = handle_version_mismatch(usb, ub_fw);
300 dev_dbg_f(&udev->dev,
301 "firmware device id %#06x is equal to the "
302 "actual device id\n", fw_bcdDevice);
306 r = request_fw_file(&uph_fw,
307 get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"),
312 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT);
315 "Could not upload firmware code uph. Error number %d\n",
321 release_firmware(ub_fw);
322 release_firmware(uph_fw);
326 MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ur");
327 MODULE_FIRMWARE(FW_ZD1211_PREFIX "ur");
328 MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ub");
329 MODULE_FIRMWARE(FW_ZD1211_PREFIX "ub");
330 MODULE_FIRMWARE(FW_ZD1211B_PREFIX "uphr");
331 MODULE_FIRMWARE(FW_ZD1211_PREFIX "uphr");
333 /* Read data from device address space using "firmware interface" which does
334 * not require firmware to be loaded. */
335 int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len)
338 struct usb_device *udev = zd_usb_to_usbdev(usb);
341 /* Use "DMA-aware" buffer. */
342 buf = kmalloc(len, GFP_KERNEL);
345 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
346 USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0,
350 "read over firmware interface failed: %d\n", r);
352 } else if (r != len) {
354 "incomplete read over firmware interface: %d/%d\n",
360 memcpy(data, buf, len);
366 #define urb_dev(urb) (&(urb)->dev->dev)
368 static inline void handle_regs_int(struct urb *urb)
370 struct zd_usb *usb = urb->context;
371 struct zd_usb_interrupt *intr = &usb->intr;
375 ZD_ASSERT(in_interrupt());
376 spin_lock(&intr->lock);
378 int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2));
379 if (int_num == CR_INTERRUPT) {
380 struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context));
381 spin_lock(&mac->lock);
382 memcpy(&mac->intr_buffer, urb->transfer_buffer,
383 USB_MAX_EP_INT_BUFFER);
384 spin_unlock(&mac->lock);
385 schedule_work(&mac->process_intr);
386 } else if (intr->read_regs_enabled) {
387 intr->read_regs.length = len = urb->actual_length;
389 if (len > sizeof(intr->read_regs.buffer))
390 len = sizeof(intr->read_regs.buffer);
391 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
392 intr->read_regs_enabled = 0;
393 complete(&intr->read_regs.completion);
398 spin_unlock(&intr->lock);
401 static void int_urb_complete(struct urb *urb)
404 struct usb_int_header *hdr;
406 switch (urb->status) {
415 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
418 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
422 if (urb->actual_length < sizeof(hdr)) {
423 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
427 hdr = urb->transfer_buffer;
428 if (hdr->type != USB_INT_TYPE) {
429 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
434 case USB_INT_ID_REGS:
435 handle_regs_int(urb);
437 case USB_INT_ID_RETRY_FAILED:
438 zd_mac_tx_failed(urb);
441 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
442 (unsigned int)hdr->id);
447 r = usb_submit_urb(urb, GFP_ATOMIC);
449 dev_dbg_f(urb_dev(urb), "error: resubmit urb %p err code %d\n",
451 /* TODO: add worker to reset intr->urb */
456 static inline int int_urb_interval(struct usb_device *udev)
458 switch (udev->speed) {
469 static inline int usb_int_enabled(struct zd_usb *usb)
472 struct zd_usb_interrupt *intr = &usb->intr;
475 spin_lock_irqsave(&intr->lock, flags);
477 spin_unlock_irqrestore(&intr->lock, flags);
481 int zd_usb_enable_int(struct zd_usb *usb)
484 struct usb_device *udev = zd_usb_to_usbdev(usb);
485 struct zd_usb_interrupt *intr = &usb->intr;
488 dev_dbg_f(zd_usb_dev(usb), "\n");
490 urb = usb_alloc_urb(0, GFP_KERNEL);
496 ZD_ASSERT(!irqs_disabled());
497 spin_lock_irq(&intr->lock);
499 spin_unlock_irq(&intr->lock);
504 spin_unlock_irq(&intr->lock);
507 intr->buffer = usb_alloc_coherent(udev, USB_MAX_EP_INT_BUFFER,
508 GFP_KERNEL, &intr->buffer_dma);
510 dev_dbg_f(zd_usb_dev(usb),
511 "couldn't allocate transfer_buffer\n");
512 goto error_set_urb_null;
515 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
516 intr->buffer, USB_MAX_EP_INT_BUFFER,
517 int_urb_complete, usb,
519 urb->transfer_dma = intr->buffer_dma;
520 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
522 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
523 r = usb_submit_urb(urb, GFP_KERNEL);
525 dev_dbg_f(zd_usb_dev(usb),
526 "Couldn't submit urb. Error number %d\n", r);
532 usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER,
533 intr->buffer, intr->buffer_dma);
535 spin_lock_irq(&intr->lock);
537 spin_unlock_irq(&intr->lock);
544 void zd_usb_disable_int(struct zd_usb *usb)
547 struct usb_device *udev = zd_usb_to_usbdev(usb);
548 struct zd_usb_interrupt *intr = &usb->intr;
551 dma_addr_t buffer_dma;
553 spin_lock_irqsave(&intr->lock, flags);
556 spin_unlock_irqrestore(&intr->lock, flags);
560 buffer = intr->buffer;
561 buffer_dma = intr->buffer_dma;
563 spin_unlock_irqrestore(&intr->lock, flags);
566 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
570 usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER,
574 static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
578 const struct rx_length_info *length_info;
580 if (length < sizeof(struct rx_length_info)) {
581 /* It's not a complete packet anyhow. */
582 printk("%s: invalid, small RX packet : %d\n",
586 length_info = (struct rx_length_info *)
587 (buffer + length - sizeof(struct rx_length_info));
589 /* It might be that three frames are merged into a single URB
590 * transaction. We have to check for the length info tag.
592 * While testing we discovered that length_info might be unaligned,
593 * because if USB transactions are merged, the last packet will not
594 * be padded. Unaligned access might also happen if the length_info
595 * structure is not present.
597 if (get_unaligned_le16(&length_info->tag) == RX_LENGTH_INFO_TAG)
599 unsigned int l, k, n;
600 for (i = 0, l = 0;; i++) {
601 k = get_unaligned_le16(&length_info->length[i]);
607 zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k);
613 zd_mac_rx(zd_usb_to_hw(usb), buffer, length);
617 static void rx_urb_complete(struct urb *urb)
621 struct zd_usb_rx *rx;
625 switch (urb->status) {
634 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
637 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
641 buffer = urb->transfer_buffer;
642 length = urb->actual_length;
646 zd_usb_reset_rx_idle_timer(usb);
648 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
649 /* If there is an old first fragment, we don't care. */
650 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
651 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
652 spin_lock(&rx->lock);
653 memcpy(rx->fragment, buffer, length);
654 rx->fragment_length = length;
655 spin_unlock(&rx->lock);
659 spin_lock(&rx->lock);
660 if (rx->fragment_length > 0) {
661 /* We are on a second fragment, we believe */
662 ZD_ASSERT(length + rx->fragment_length <=
663 ARRAY_SIZE(rx->fragment));
664 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
665 memcpy(rx->fragment+rx->fragment_length, buffer, length);
666 handle_rx_packet(usb, rx->fragment,
667 rx->fragment_length + length);
668 rx->fragment_length = 0;
669 spin_unlock(&rx->lock);
671 spin_unlock(&rx->lock);
672 handle_rx_packet(usb, buffer, length);
676 r = usb_submit_urb(urb, GFP_ATOMIC);
678 dev_dbg_f(urb_dev(urb), "urb %p resubmit error %d\n", urb, r);
681 static struct urb *alloc_rx_urb(struct zd_usb *usb)
683 struct usb_device *udev = zd_usb_to_usbdev(usb);
687 urb = usb_alloc_urb(0, GFP_KERNEL);
690 buffer = usb_alloc_coherent(udev, USB_MAX_RX_SIZE, GFP_KERNEL,
697 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
698 buffer, USB_MAX_RX_SIZE,
699 rx_urb_complete, usb);
700 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
705 static void free_rx_urb(struct urb *urb)
709 usb_free_coherent(urb->dev, urb->transfer_buffer_length,
710 urb->transfer_buffer, urb->transfer_dma);
714 static int __zd_usb_enable_rx(struct zd_usb *usb)
717 struct zd_usb_rx *rx = &usb->rx;
720 dev_dbg_f(zd_usb_dev(usb), "\n");
723 urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL);
726 for (i = 0; i < RX_URBS_COUNT; i++) {
727 urbs[i] = alloc_rx_urb(usb);
732 ZD_ASSERT(!irqs_disabled());
733 spin_lock_irq(&rx->lock);
735 spin_unlock_irq(&rx->lock);
740 rx->urbs_count = RX_URBS_COUNT;
741 spin_unlock_irq(&rx->lock);
743 for (i = 0; i < RX_URBS_COUNT; i++) {
744 r = usb_submit_urb(urbs[i], GFP_KERNEL);
751 for (i = 0; i < RX_URBS_COUNT; i++) {
752 usb_kill_urb(urbs[i]);
754 spin_lock_irq(&rx->lock);
757 spin_unlock_irq(&rx->lock);
760 for (i = 0; i < RX_URBS_COUNT; i++)
761 free_rx_urb(urbs[i]);
766 int zd_usb_enable_rx(struct zd_usb *usb)
769 struct zd_usb_rx *rx = &usb->rx;
771 mutex_lock(&rx->setup_mutex);
772 r = __zd_usb_enable_rx(usb);
773 mutex_unlock(&rx->setup_mutex);
775 zd_usb_reset_rx_idle_timer(usb);
780 static void __zd_usb_disable_rx(struct zd_usb *usb)
786 struct zd_usb_rx *rx = &usb->rx;
788 spin_lock_irqsave(&rx->lock, flags);
790 count = rx->urbs_count;
791 spin_unlock_irqrestore(&rx->lock, flags);
795 for (i = 0; i < count; i++) {
796 usb_kill_urb(urbs[i]);
797 free_rx_urb(urbs[i]);
801 spin_lock_irqsave(&rx->lock, flags);
804 spin_unlock_irqrestore(&rx->lock, flags);
807 void zd_usb_disable_rx(struct zd_usb *usb)
809 struct zd_usb_rx *rx = &usb->rx;
811 mutex_lock(&rx->setup_mutex);
812 __zd_usb_disable_rx(usb);
813 mutex_unlock(&rx->setup_mutex);
815 cancel_delayed_work_sync(&rx->idle_work);
818 static void zd_usb_reset_rx(struct zd_usb *usb)
821 struct zd_usb_rx *rx = &usb->rx;
824 mutex_lock(&rx->setup_mutex);
826 spin_lock_irqsave(&rx->lock, flags);
827 do_reset = rx->urbs != NULL;
828 spin_unlock_irqrestore(&rx->lock, flags);
831 __zd_usb_disable_rx(usb);
832 __zd_usb_enable_rx(usb);
835 mutex_unlock(&rx->setup_mutex);
838 zd_usb_reset_rx_idle_timer(usb);
842 * zd_usb_disable_tx - disable transmission
843 * @usb: the zd1211rw-private USB structure
845 * Frees all URBs in the free list and marks the transmission as disabled.
847 void zd_usb_disable_tx(struct zd_usb *usb)
849 struct zd_usb_tx *tx = &usb->tx;
852 atomic_set(&tx->enabled, 0);
854 /* kill all submitted tx-urbs */
855 usb_kill_anchored_urbs(&tx->submitted);
857 spin_lock_irqsave(&tx->lock, flags);
858 WARN_ON(!skb_queue_empty(&tx->submitted_skbs));
859 WARN_ON(tx->submitted_urbs != 0);
860 tx->submitted_urbs = 0;
861 spin_unlock_irqrestore(&tx->lock, flags);
863 /* The stopped state is ignored, relying on ieee80211_wake_queues()
864 * in a potentionally following zd_usb_enable_tx().
869 * zd_usb_enable_tx - enables transmission
870 * @usb: a &struct zd_usb pointer
872 * This function enables transmission and prepares the &zd_usb_tx data
875 void zd_usb_enable_tx(struct zd_usb *usb)
878 struct zd_usb_tx *tx = &usb->tx;
880 spin_lock_irqsave(&tx->lock, flags);
881 atomic_set(&tx->enabled, 1);
882 tx->submitted_urbs = 0;
883 ieee80211_wake_queues(zd_usb_to_hw(usb));
885 spin_unlock_irqrestore(&tx->lock, flags);
888 static void tx_dec_submitted_urbs(struct zd_usb *usb)
890 struct zd_usb_tx *tx = &usb->tx;
893 spin_lock_irqsave(&tx->lock, flags);
894 --tx->submitted_urbs;
895 if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) {
896 ieee80211_wake_queues(zd_usb_to_hw(usb));
899 spin_unlock_irqrestore(&tx->lock, flags);
902 static void tx_inc_submitted_urbs(struct zd_usb *usb)
904 struct zd_usb_tx *tx = &usb->tx;
907 spin_lock_irqsave(&tx->lock, flags);
908 ++tx->submitted_urbs;
909 if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) {
910 ieee80211_stop_queues(zd_usb_to_hw(usb));
913 spin_unlock_irqrestore(&tx->lock, flags);
917 * tx_urb_complete - completes the execution of an URB
920 * This function is called if the URB has been transferred to a device or an
921 * error has happened.
923 static void tx_urb_complete(struct urb *urb)
927 struct ieee80211_tx_info *info;
929 struct zd_usb_tx *tx;
931 skb = (struct sk_buff *)urb->context;
932 info = IEEE80211_SKB_CB(skb);
934 * grab 'usb' pointer before handing off the skb (since
935 * it might be freed by zd_mac_tx_to_dev or mac80211)
937 usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb;
940 switch (urb->status) {
949 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
952 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
956 skb_unlink(skb, &usb->tx.submitted_skbs);
957 zd_mac_tx_to_dev(skb, urb->status);
959 tx_dec_submitted_urbs(usb);
962 usb_anchor_urb(urb, &tx->submitted);
963 r = usb_submit_urb(urb, GFP_ATOMIC);
965 usb_unanchor_urb(urb);
966 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
972 * zd_usb_tx: initiates transfer of a frame of the device
974 * @usb: the zd1211rw-private USB structure
975 * @skb: a &struct sk_buff pointer
977 * This function tranmits a frame to the device. It doesn't wait for
978 * completion. The frame must contain the control set and have all the
979 * control set information available.
981 * The function returns 0 if the transfer has been successfully initiated.
983 int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb)
986 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
987 struct usb_device *udev = zd_usb_to_usbdev(usb);
989 struct zd_usb_tx *tx = &usb->tx;
991 if (!atomic_read(&tx->enabled)) {
996 urb = usb_alloc_urb(0, GFP_ATOMIC);
1002 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
1003 skb->data, skb->len, tx_urb_complete, skb);
1005 info->rate_driver_data[1] = (void *)jiffies;
1006 skb_queue_tail(&tx->submitted_skbs, skb);
1007 usb_anchor_urb(urb, &tx->submitted);
1009 r = usb_submit_urb(urb, GFP_ATOMIC);
1011 dev_dbg_f(zd_usb_dev(usb), "error submit urb %p %d\n", urb, r);
1012 usb_unanchor_urb(urb);
1013 skb_unlink(skb, &tx->submitted_skbs);
1016 tx_inc_submitted_urbs(usb);
1024 static bool zd_tx_timeout(struct zd_usb *usb)
1026 struct zd_usb_tx *tx = &usb->tx;
1027 struct sk_buff_head *q = &tx->submitted_skbs;
1028 struct sk_buff *skb, *skbnext;
1029 struct ieee80211_tx_info *info;
1030 unsigned long flags, trans_start;
1031 bool have_timedout = false;
1033 spin_lock_irqsave(&q->lock, flags);
1034 skb_queue_walk_safe(q, skb, skbnext) {
1035 info = IEEE80211_SKB_CB(skb);
1036 trans_start = (unsigned long)info->rate_driver_data[1];
1038 if (time_is_before_jiffies(trans_start + ZD_TX_TIMEOUT)) {
1039 have_timedout = true;
1043 spin_unlock_irqrestore(&q->lock, flags);
1045 return have_timedout;
1048 static void zd_tx_watchdog_handler(struct work_struct *work)
1050 struct zd_usb *usb =
1051 container_of(work, struct zd_usb, tx.watchdog_work.work);
1052 struct zd_usb_tx *tx = &usb->tx;
1054 if (!atomic_read(&tx->enabled) || !tx->watchdog_enabled)
1056 if (!zd_tx_timeout(usb))
1059 /* TX halted, try reset */
1060 dev_warn(zd_usb_dev(usb), "TX-stall detected, reseting device...");
1062 usb_queue_reset_device(usb->intf);
1064 /* reset will stop this worker, don't rearm */
1067 queue_delayed_work(zd_workqueue, &tx->watchdog_work,
1068 ZD_TX_WATCHDOG_INTERVAL);
1071 void zd_tx_watchdog_enable(struct zd_usb *usb)
1073 struct zd_usb_tx *tx = &usb->tx;
1075 if (!tx->watchdog_enabled) {
1076 dev_dbg_f(zd_usb_dev(usb), "\n");
1077 queue_delayed_work(zd_workqueue, &tx->watchdog_work,
1078 ZD_TX_WATCHDOG_INTERVAL);
1079 tx->watchdog_enabled = 1;
1083 void zd_tx_watchdog_disable(struct zd_usb *usb)
1085 struct zd_usb_tx *tx = &usb->tx;
1087 if (tx->watchdog_enabled) {
1088 dev_dbg_f(zd_usb_dev(usb), "\n");
1089 tx->watchdog_enabled = 0;
1090 cancel_delayed_work_sync(&tx->watchdog_work);
1094 static void zd_rx_idle_timer_handler(struct work_struct *work)
1096 struct zd_usb *usb =
1097 container_of(work, struct zd_usb, rx.idle_work.work);
1098 struct zd_mac *mac = zd_usb_to_mac(usb);
1100 if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags))
1103 dev_dbg_f(zd_usb_dev(usb), "\n");
1105 /* 30 seconds since last rx, reset rx */
1106 zd_usb_reset_rx(usb);
1109 void zd_usb_reset_rx_idle_timer(struct zd_usb *usb)
1111 struct zd_usb_rx *rx = &usb->rx;
1113 cancel_delayed_work(&rx->idle_work);
1114 queue_delayed_work(zd_workqueue, &rx->idle_work, ZD_RX_IDLE_INTERVAL);
1117 static inline void init_usb_interrupt(struct zd_usb *usb)
1119 struct zd_usb_interrupt *intr = &usb->intr;
1121 spin_lock_init(&intr->lock);
1122 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
1123 init_completion(&intr->read_regs.completion);
1124 intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT);
1127 static inline void init_usb_rx(struct zd_usb *usb)
1129 struct zd_usb_rx *rx = &usb->rx;
1130 spin_lock_init(&rx->lock);
1131 mutex_init(&rx->setup_mutex);
1132 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
1133 rx->usb_packet_size = 512;
1135 rx->usb_packet_size = 64;
1137 ZD_ASSERT(rx->fragment_length == 0);
1138 INIT_DELAYED_WORK(&rx->idle_work, zd_rx_idle_timer_handler);
1141 static inline void init_usb_tx(struct zd_usb *usb)
1143 struct zd_usb_tx *tx = &usb->tx;
1144 spin_lock_init(&tx->lock);
1145 atomic_set(&tx->enabled, 0);
1147 skb_queue_head_init(&tx->submitted_skbs);
1148 init_usb_anchor(&tx->submitted);
1149 tx->submitted_urbs = 0;
1150 tx->watchdog_enabled = 0;
1151 INIT_DELAYED_WORK(&tx->watchdog_work, zd_tx_watchdog_handler);
1154 void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
1155 struct usb_interface *intf)
1157 memset(usb, 0, sizeof(*usb));
1158 usb->intf = usb_get_intf(intf);
1159 usb_set_intfdata(usb->intf, hw);
1160 init_usb_anchor(&usb->submitted_cmds);
1161 init_usb_interrupt(usb);
1166 void zd_usb_clear(struct zd_usb *usb)
1168 usb_set_intfdata(usb->intf, NULL);
1169 usb_put_intf(usb->intf);
1170 ZD_MEMCLEAR(usb, sizeof(*usb));
1171 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
1174 static const char *speed(enum usb_device_speed speed)
1179 case USB_SPEED_FULL:
1181 case USB_SPEED_HIGH:
1184 return "unknown speed";
1188 static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
1190 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
1191 le16_to_cpu(udev->descriptor.idVendor),
1192 le16_to_cpu(udev->descriptor.idProduct),
1193 get_bcdDevice(udev),
1194 speed(udev->speed));
1197 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
1199 struct usb_device *udev = interface_to_usbdev(usb->intf);
1200 return scnprint_id(udev, buffer, size);
1204 static void print_id(struct usb_device *udev)
1208 scnprint_id(udev, buffer, sizeof(buffer));
1209 buffer[sizeof(buffer)-1] = 0;
1210 dev_dbg_f(&udev->dev, "%s\n", buffer);
1213 #define print_id(udev) do { } while (0)
1216 static int eject_installer(struct usb_interface *intf)
1218 struct usb_device *udev = interface_to_usbdev(intf);
1219 struct usb_host_interface *iface_desc = &intf->altsetting[0];
1220 struct usb_endpoint_descriptor *endpoint;
1225 /* Find bulk out endpoint */
1226 for (r = 1; r >= 0; r--) {
1227 endpoint = &iface_desc->endpoint[r].desc;
1228 if (usb_endpoint_dir_out(endpoint) &&
1229 usb_endpoint_xfer_bulk(endpoint)) {
1230 bulk_out_ep = endpoint->bEndpointAddress;
1236 "zd1211rw: Could not find bulk out endpoint\n");
1240 cmd = kzalloc(31, GFP_KERNEL);
1244 /* USB bulk command block */
1245 cmd[0] = 0x55; /* bulk command signature */
1246 cmd[1] = 0x53; /* bulk command signature */
1247 cmd[2] = 0x42; /* bulk command signature */
1248 cmd[3] = 0x43; /* bulk command signature */
1249 cmd[14] = 6; /* command length */
1251 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1252 cmd[19] = 0x2; /* eject disc */
1254 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
1255 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1256 cmd, 31, NULL, 2000);
1261 /* At this point, the device disconnects and reconnects with the real
1264 usb_set_intfdata(intf, NULL);
1268 int zd_usb_init_hw(struct zd_usb *usb)
1271 struct zd_mac *mac = zd_usb_to_mac(usb);
1273 dev_dbg_f(zd_usb_dev(usb), "\n");
1275 r = upload_firmware(usb);
1277 dev_err(zd_usb_dev(usb),
1278 "couldn't load firmware. Error number %d\n", r);
1282 r = usb_reset_configuration(zd_usb_to_usbdev(usb));
1284 dev_dbg_f(zd_usb_dev(usb),
1285 "couldn't reset configuration. Error number %d\n", r);
1289 r = zd_mac_init_hw(mac->hw);
1291 dev_dbg_f(zd_usb_dev(usb),
1292 "couldn't initialize mac. Error number %d\n", r);
1296 usb->initialized = 1;
1300 static int probe(struct usb_interface *intf, const struct usb_device_id *id)
1303 struct usb_device *udev = interface_to_usbdev(intf);
1305 struct ieee80211_hw *hw = NULL;
1309 if (id->driver_info & DEVICE_INSTALLER)
1310 return eject_installer(intf);
1312 switch (udev->speed) {
1314 case USB_SPEED_FULL:
1315 case USB_SPEED_HIGH:
1318 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
1323 r = usb_reset_device(udev);
1326 "couldn't reset usb device. Error number %d\n", r);
1330 hw = zd_mac_alloc_hw(intf);
1336 usb = &zd_hw_mac(hw)->chip.usb;
1337 usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0;
1339 r = zd_mac_preinit_hw(hw);
1341 dev_dbg_f(&intf->dev,
1342 "couldn't initialize mac. Error number %d\n", r);
1346 r = ieee80211_register_hw(hw);
1348 dev_dbg_f(&intf->dev,
1349 "couldn't register device. Error number %d\n", r);
1353 dev_dbg_f(&intf->dev, "successful\n");
1354 dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy));
1357 usb_reset_device(interface_to_usbdev(intf));
1359 zd_mac_clear(zd_hw_mac(hw));
1360 ieee80211_free_hw(hw);
1365 static void disconnect(struct usb_interface *intf)
1367 struct ieee80211_hw *hw = zd_intf_to_hw(intf);
1371 /* Either something really bad happened, or we're just dealing with
1372 * a DEVICE_INSTALLER. */
1376 mac = zd_hw_mac(hw);
1377 usb = &mac->chip.usb;
1379 dev_dbg_f(zd_usb_dev(usb), "\n");
1381 ieee80211_unregister_hw(hw);
1383 /* Just in case something has gone wrong! */
1384 zd_usb_disable_tx(usb);
1385 zd_usb_disable_rx(usb);
1386 zd_usb_disable_int(usb);
1388 /* If the disconnect has been caused by a removal of the
1389 * driver module, the reset allows reloading of the driver. If the
1390 * reset will not be executed here, the upload of the firmware in the
1391 * probe function caused by the reloading of the driver will fail.
1393 usb_reset_device(interface_to_usbdev(intf));
1396 ieee80211_free_hw(hw);
1397 dev_dbg(&intf->dev, "disconnected\n");
1400 static void zd_usb_resume(struct zd_usb *usb)
1402 struct zd_mac *mac = zd_usb_to_mac(usb);
1405 dev_dbg_f(zd_usb_dev(usb), "\n");
1407 r = zd_op_start(zd_usb_to_hw(usb));
1409 dev_warn(zd_usb_dev(usb), "Device resume failed "
1410 "with error code %d. Retrying...\n", r);
1411 if (usb->was_running)
1412 set_bit(ZD_DEVICE_RUNNING, &mac->flags);
1413 usb_queue_reset_device(usb->intf);
1417 if (mac->type != NL80211_IFTYPE_UNSPECIFIED) {
1418 r = zd_restore_settings(mac);
1420 dev_dbg(zd_usb_dev(usb),
1421 "failed to restore settings, %d\n", r);
1427 static void zd_usb_stop(struct zd_usb *usb)
1429 dev_dbg_f(zd_usb_dev(usb), "\n");
1431 zd_op_stop(zd_usb_to_hw(usb));
1433 zd_usb_disable_tx(usb);
1434 zd_usb_disable_rx(usb);
1435 zd_usb_disable_int(usb);
1437 usb->initialized = 0;
1440 static int pre_reset(struct usb_interface *intf)
1442 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1446 if (!hw || intf->condition != USB_INTERFACE_BOUND)
1449 mac = zd_hw_mac(hw);
1450 usb = &mac->chip.usb;
1452 usb->was_running = test_bit(ZD_DEVICE_RUNNING, &mac->flags);
1456 mutex_lock(&mac->chip.mutex);
1460 static int post_reset(struct usb_interface *intf)
1462 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1466 if (!hw || intf->condition != USB_INTERFACE_BOUND)
1469 mac = zd_hw_mac(hw);
1470 usb = &mac->chip.usb;
1472 mutex_unlock(&mac->chip.mutex);
1474 if (usb->was_running)
1479 static struct usb_driver driver = {
1480 .name = KBUILD_MODNAME,
1481 .id_table = usb_ids,
1483 .disconnect = disconnect,
1484 .pre_reset = pre_reset,
1485 .post_reset = post_reset,
1488 struct workqueue_struct *zd_workqueue;
1490 static int __init usb_init(void)
1494 pr_debug("%s usb_init()\n", driver.name);
1496 zd_workqueue = create_singlethread_workqueue(driver.name);
1497 if (zd_workqueue == NULL) {
1498 printk(KERN_ERR "%s couldn't create workqueue\n", driver.name);
1502 r = usb_register(&driver);
1504 destroy_workqueue(zd_workqueue);
1505 printk(KERN_ERR "%s usb_register() failed. Error number %d\n",
1510 pr_debug("%s initialized\n", driver.name);
1514 static void __exit usb_exit(void)
1516 pr_debug("%s usb_exit()\n", driver.name);
1517 usb_deregister(&driver);
1518 destroy_workqueue(zd_workqueue);
1521 module_init(usb_init);
1522 module_exit(usb_exit);
1524 static int usb_int_regs_length(unsigned int count)
1526 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1529 static void prepare_read_regs_int(struct zd_usb *usb)
1531 struct zd_usb_interrupt *intr = &usb->intr;
1533 spin_lock_irq(&intr->lock);
1534 intr->read_regs_enabled = 1;
1535 INIT_COMPLETION(intr->read_regs.completion);
1536 spin_unlock_irq(&intr->lock);
1539 static void disable_read_regs_int(struct zd_usb *usb)
1541 struct zd_usb_interrupt *intr = &usb->intr;
1543 spin_lock_irq(&intr->lock);
1544 intr->read_regs_enabled = 0;
1545 spin_unlock_irq(&intr->lock);
1548 static int get_results(struct zd_usb *usb, u16 *values,
1549 struct usb_req_read_regs *req, unsigned int count)
1553 struct zd_usb_interrupt *intr = &usb->intr;
1554 struct read_regs_int *rr = &intr->read_regs;
1555 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1557 spin_lock_irq(&intr->lock);
1560 /* The created block size seems to be larger than expected.
1561 * However results appear to be correct.
1563 if (rr->length < usb_int_regs_length(count)) {
1564 dev_dbg_f(zd_usb_dev(usb),
1565 "error: actual length %d less than expected %d\n",
1566 rr->length, usb_int_regs_length(count));
1569 if (rr->length > sizeof(rr->buffer)) {
1570 dev_dbg_f(zd_usb_dev(usb),
1571 "error: actual length %d exceeds buffer size %zu\n",
1572 rr->length, sizeof(rr->buffer));
1576 for (i = 0; i < count; i++) {
1577 struct reg_data *rd = ®s->regs[i];
1578 if (rd->addr != req->addr[i]) {
1579 dev_dbg_f(zd_usb_dev(usb),
1580 "rd[%d] addr %#06hx expected %#06hx\n", i,
1581 le16_to_cpu(rd->addr),
1582 le16_to_cpu(req->addr[i]));
1585 values[i] = le16_to_cpu(rd->value);
1590 spin_unlock_irq(&intr->lock);
1594 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1595 const zd_addr_t *addresses, unsigned int count)
1598 int i, req_len, actual_req_len;
1599 struct usb_device *udev;
1600 struct usb_req_read_regs *req = NULL;
1601 unsigned long timeout;
1604 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1607 if (count > USB_MAX_IOREAD16_COUNT) {
1608 dev_dbg_f(zd_usb_dev(usb),
1609 "error: count %u exceeds possible max %u\n",
1610 count, USB_MAX_IOREAD16_COUNT);
1614 dev_dbg_f(zd_usb_dev(usb),
1615 "error: io in atomic context not supported\n");
1616 return -EWOULDBLOCK;
1618 if (!usb_int_enabled(usb)) {
1619 dev_dbg_f(zd_usb_dev(usb),
1620 "error: usb interrupt not enabled\n");
1621 return -EWOULDBLOCK;
1624 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1625 BUILD_BUG_ON(sizeof(struct usb_req_read_regs) + USB_MAX_IOREAD16_COUNT *
1626 sizeof(__le16) > sizeof(usb->req_buf));
1627 BUG_ON(sizeof(struct usb_req_read_regs) + count * sizeof(__le16) >
1628 sizeof(usb->req_buf));
1630 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1631 req = (void *)usb->req_buf;
1633 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1634 for (i = 0; i < count; i++)
1635 req->addr[i] = cpu_to_le16((u16)addresses[i]);
1637 udev = zd_usb_to_usbdev(usb);
1638 prepare_read_regs_int(usb);
1639 r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT),
1640 req, req_len, &actual_req_len, 50 /* ms */);
1642 dev_dbg_f(zd_usb_dev(usb),
1643 "error in usb_interrupt_msg(). Error number %d\n", r);
1646 if (req_len != actual_req_len) {
1647 dev_dbg_f(zd_usb_dev(usb), "error in usb_interrupt_msg()\n"
1648 " req_len %d != actual_req_len %d\n",
1649 req_len, actual_req_len);
1654 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1655 msecs_to_jiffies(50));
1657 disable_read_regs_int(usb);
1658 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1663 r = get_results(usb, values, req, count);
1668 static void iowrite16v_urb_complete(struct urb *urb)
1670 struct zd_usb *usb = urb->context;
1672 if (urb->status && !usb->cmd_error)
1673 usb->cmd_error = urb->status;
1676 static int zd_submit_waiting_urb(struct zd_usb *usb, bool last)
1679 struct urb *urb = usb->urb_async_waiting;
1684 usb->urb_async_waiting = NULL;
1687 urb->transfer_flags |= URB_NO_INTERRUPT;
1689 usb_anchor_urb(urb, &usb->submitted_cmds);
1690 r = usb_submit_urb(urb, GFP_KERNEL);
1692 usb_unanchor_urb(urb);
1693 dev_dbg_f(zd_usb_dev(usb),
1694 "error in usb_submit_urb(). Error number %d\n", r);
1698 /* fall-through with r == 0 */
1704 void zd_usb_iowrite16v_async_start(struct zd_usb *usb)
1706 ZD_ASSERT(usb_anchor_empty(&usb->submitted_cmds));
1707 ZD_ASSERT(usb->urb_async_waiting == NULL);
1708 ZD_ASSERT(!usb->in_async);
1710 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1714 usb->urb_async_waiting = NULL;
1717 int zd_usb_iowrite16v_async_end(struct zd_usb *usb, unsigned int timeout)
1721 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1722 ZD_ASSERT(usb->in_async);
1724 /* Submit last iowrite16v URB */
1725 r = zd_submit_waiting_urb(usb, true);
1727 dev_dbg_f(zd_usb_dev(usb),
1728 "error in zd_submit_waiting_usb(). "
1729 "Error number %d\n", r);
1731 usb_kill_anchored_urbs(&usb->submitted_cmds);
1736 timeout = usb_wait_anchor_empty_timeout(&usb->submitted_cmds,
1739 usb_kill_anchored_urbs(&usb->submitted_cmds);
1740 if (usb->cmd_error == -ENOENT) {
1741 dev_dbg_f(zd_usb_dev(usb), "timed out");
1753 int zd_usb_iowrite16v_async(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1757 struct usb_device *udev;
1758 struct usb_req_write_regs *req = NULL;
1761 struct usb_host_endpoint *ep;
1763 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1764 ZD_ASSERT(usb->in_async);
1768 if (count > USB_MAX_IOWRITE16_COUNT) {
1769 dev_dbg_f(zd_usb_dev(usb),
1770 "error: count %u exceeds possible max %u\n",
1771 count, USB_MAX_IOWRITE16_COUNT);
1775 dev_dbg_f(zd_usb_dev(usb),
1776 "error: io in atomic context not supported\n");
1777 return -EWOULDBLOCK;
1780 udev = zd_usb_to_usbdev(usb);
1782 ep = usb_pipe_endpoint(udev, usb_sndintpipe(udev, EP_REGS_OUT));
1786 urb = usb_alloc_urb(0, GFP_KERNEL);
1790 req_len = sizeof(struct usb_req_write_regs) +
1791 count * sizeof(struct reg_data);
1792 req = kmalloc(req_len, GFP_KERNEL);
1798 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1799 for (i = 0; i < count; i++) {
1800 struct reg_data *rw = &req->reg_writes[i];
1801 rw->addr = cpu_to_le16((u16)ioreqs[i].addr);
1802 rw->value = cpu_to_le16(ioreqs[i].value);
1805 usb_fill_int_urb(urb, udev, usb_sndintpipe(udev, EP_REGS_OUT),
1806 req, req_len, iowrite16v_urb_complete, usb,
1807 ep->desc.bInterval);
1808 urb->transfer_flags |= URB_FREE_BUFFER | URB_SHORT_NOT_OK;
1810 /* Submit previous URB */
1811 r = zd_submit_waiting_urb(usb, false);
1813 dev_dbg_f(zd_usb_dev(usb),
1814 "error in zd_submit_waiting_usb(). "
1815 "Error number %d\n", r);
1819 /* Delay submit so that URB_NO_INTERRUPT flag can be set for all URBs
1820 * of currect batch except for very last.
1822 usb->urb_async_waiting = urb;
1829 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1834 zd_usb_iowrite16v_async_start(usb);
1835 r = zd_usb_iowrite16v_async(usb, ioreqs, count);
1837 zd_usb_iowrite16v_async_end(usb, 0);
1840 return zd_usb_iowrite16v_async_end(usb, 50 /* ms */);
1843 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1846 struct usb_device *udev;
1847 struct usb_req_rfwrite *req = NULL;
1848 int i, req_len, actual_req_len;
1849 u16 bit_value_template;
1852 dev_dbg_f(zd_usb_dev(usb),
1853 "error: io in atomic context not supported\n");
1854 return -EWOULDBLOCK;
1856 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1857 dev_dbg_f(zd_usb_dev(usb),
1858 "error: bits %d are smaller than"
1859 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1860 bits, USB_MIN_RFWRITE_BIT_COUNT);
1863 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1864 dev_dbg_f(zd_usb_dev(usb),
1865 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1866 bits, USB_MAX_RFWRITE_BIT_COUNT);
1870 if (value & (~0UL << bits)) {
1871 dev_dbg_f(zd_usb_dev(usb),
1872 "error: value %#09x has bits >= %d set\n",
1878 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1880 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1882 dev_dbg_f(zd_usb_dev(usb),
1883 "error %d: Couldn't read CR203\n", r);
1886 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1888 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1889 BUILD_BUG_ON(sizeof(struct usb_req_rfwrite) +
1890 USB_MAX_RFWRITE_BIT_COUNT * sizeof(__le16) >
1891 sizeof(usb->req_buf));
1892 BUG_ON(sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16) >
1893 sizeof(usb->req_buf));
1895 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1896 req = (void *)usb->req_buf;
1898 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1899 /* 1: 3683a, but not used in ZYDAS driver */
1900 req->value = cpu_to_le16(2);
1901 req->bits = cpu_to_le16(bits);
1903 for (i = 0; i < bits; i++) {
1904 u16 bv = bit_value_template;
1905 if (value & (1 << (bits-1-i)))
1907 req->bit_values[i] = cpu_to_le16(bv);
1910 udev = zd_usb_to_usbdev(usb);
1911 r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT),
1912 req, req_len, &actual_req_len, 50 /* ms */);
1914 dev_dbg_f(zd_usb_dev(usb),
1915 "error in usb_interrupt_msg(). Error number %d\n", r);
1918 if (req_len != actual_req_len) {
1919 dev_dbg_f(zd_usb_dev(usb), "error in usb_interrupt_msg()"
1920 " req_len %d != actual_req_len %d\n",
1921 req_len, actual_req_len);
1926 /* FALL-THROUGH with r == 0 */