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 tasklet_schedule(&rx->reset_timer_tasklet);
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 tasklet_kill(&rx->reset_timer_tasklet);
816 cancel_delayed_work_sync(&rx->idle_work);
819 static void zd_usb_reset_rx(struct zd_usb *usb)
822 struct zd_usb_rx *rx = &usb->rx;
825 mutex_lock(&rx->setup_mutex);
827 spin_lock_irqsave(&rx->lock, flags);
828 do_reset = rx->urbs != NULL;
829 spin_unlock_irqrestore(&rx->lock, flags);
832 __zd_usb_disable_rx(usb);
833 __zd_usb_enable_rx(usb);
836 mutex_unlock(&rx->setup_mutex);
839 zd_usb_reset_rx_idle_timer(usb);
843 * zd_usb_disable_tx - disable transmission
844 * @usb: the zd1211rw-private USB structure
846 * Frees all URBs in the free list and marks the transmission as disabled.
848 void zd_usb_disable_tx(struct zd_usb *usb)
850 struct zd_usb_tx *tx = &usb->tx;
853 atomic_set(&tx->enabled, 0);
855 /* kill all submitted tx-urbs */
856 usb_kill_anchored_urbs(&tx->submitted);
858 spin_lock_irqsave(&tx->lock, flags);
859 WARN_ON(!skb_queue_empty(&tx->submitted_skbs));
860 WARN_ON(tx->submitted_urbs != 0);
861 tx->submitted_urbs = 0;
862 spin_unlock_irqrestore(&tx->lock, flags);
864 /* The stopped state is ignored, relying on ieee80211_wake_queues()
865 * in a potentionally following zd_usb_enable_tx().
870 * zd_usb_enable_tx - enables transmission
871 * @usb: a &struct zd_usb pointer
873 * This function enables transmission and prepares the &zd_usb_tx data
876 void zd_usb_enable_tx(struct zd_usb *usb)
879 struct zd_usb_tx *tx = &usb->tx;
881 spin_lock_irqsave(&tx->lock, flags);
882 atomic_set(&tx->enabled, 1);
883 tx->submitted_urbs = 0;
884 ieee80211_wake_queues(zd_usb_to_hw(usb));
886 spin_unlock_irqrestore(&tx->lock, flags);
889 static void tx_dec_submitted_urbs(struct zd_usb *usb)
891 struct zd_usb_tx *tx = &usb->tx;
894 spin_lock_irqsave(&tx->lock, flags);
895 --tx->submitted_urbs;
896 if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) {
897 ieee80211_wake_queues(zd_usb_to_hw(usb));
900 spin_unlock_irqrestore(&tx->lock, flags);
903 static void tx_inc_submitted_urbs(struct zd_usb *usb)
905 struct zd_usb_tx *tx = &usb->tx;
908 spin_lock_irqsave(&tx->lock, flags);
909 ++tx->submitted_urbs;
910 if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) {
911 ieee80211_stop_queues(zd_usb_to_hw(usb));
914 spin_unlock_irqrestore(&tx->lock, flags);
918 * tx_urb_complete - completes the execution of an URB
921 * This function is called if the URB has been transferred to a device or an
922 * error has happened.
924 static void tx_urb_complete(struct urb *urb)
928 struct ieee80211_tx_info *info;
930 struct zd_usb_tx *tx;
932 skb = (struct sk_buff *)urb->context;
933 info = IEEE80211_SKB_CB(skb);
935 * grab 'usb' pointer before handing off the skb (since
936 * it might be freed by zd_mac_tx_to_dev or mac80211)
938 usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb;
941 switch (urb->status) {
950 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
953 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
957 skb_unlink(skb, &usb->tx.submitted_skbs);
958 zd_mac_tx_to_dev(skb, urb->status);
960 tx_dec_submitted_urbs(usb);
963 usb_anchor_urb(urb, &tx->submitted);
964 r = usb_submit_urb(urb, GFP_ATOMIC);
966 usb_unanchor_urb(urb);
967 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
973 * zd_usb_tx: initiates transfer of a frame of the device
975 * @usb: the zd1211rw-private USB structure
976 * @skb: a &struct sk_buff pointer
978 * This function tranmits a frame to the device. It doesn't wait for
979 * completion. The frame must contain the control set and have all the
980 * control set information available.
982 * The function returns 0 if the transfer has been successfully initiated.
984 int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb)
987 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
988 struct usb_device *udev = zd_usb_to_usbdev(usb);
990 struct zd_usb_tx *tx = &usb->tx;
992 if (!atomic_read(&tx->enabled)) {
997 urb = usb_alloc_urb(0, GFP_ATOMIC);
1003 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
1004 skb->data, skb->len, tx_urb_complete, skb);
1006 info->rate_driver_data[1] = (void *)jiffies;
1007 skb_queue_tail(&tx->submitted_skbs, skb);
1008 usb_anchor_urb(urb, &tx->submitted);
1010 r = usb_submit_urb(urb, GFP_ATOMIC);
1012 dev_dbg_f(zd_usb_dev(usb), "error submit urb %p %d\n", urb, r);
1013 usb_unanchor_urb(urb);
1014 skb_unlink(skb, &tx->submitted_skbs);
1017 tx_inc_submitted_urbs(usb);
1025 static bool zd_tx_timeout(struct zd_usb *usb)
1027 struct zd_usb_tx *tx = &usb->tx;
1028 struct sk_buff_head *q = &tx->submitted_skbs;
1029 struct sk_buff *skb, *skbnext;
1030 struct ieee80211_tx_info *info;
1031 unsigned long flags, trans_start;
1032 bool have_timedout = false;
1034 spin_lock_irqsave(&q->lock, flags);
1035 skb_queue_walk_safe(q, skb, skbnext) {
1036 info = IEEE80211_SKB_CB(skb);
1037 trans_start = (unsigned long)info->rate_driver_data[1];
1039 if (time_is_before_jiffies(trans_start + ZD_TX_TIMEOUT)) {
1040 have_timedout = true;
1044 spin_unlock_irqrestore(&q->lock, flags);
1046 return have_timedout;
1049 static void zd_tx_watchdog_handler(struct work_struct *work)
1051 struct zd_usb *usb =
1052 container_of(work, struct zd_usb, tx.watchdog_work.work);
1053 struct zd_usb_tx *tx = &usb->tx;
1055 if (!atomic_read(&tx->enabled) || !tx->watchdog_enabled)
1057 if (!zd_tx_timeout(usb))
1060 /* TX halted, try reset */
1061 dev_warn(zd_usb_dev(usb), "TX-stall detected, reseting device...");
1063 usb_queue_reset_device(usb->intf);
1065 /* reset will stop this worker, don't rearm */
1068 queue_delayed_work(zd_workqueue, &tx->watchdog_work,
1069 ZD_TX_WATCHDOG_INTERVAL);
1072 void zd_tx_watchdog_enable(struct zd_usb *usb)
1074 struct zd_usb_tx *tx = &usb->tx;
1076 if (!tx->watchdog_enabled) {
1077 dev_dbg_f(zd_usb_dev(usb), "\n");
1078 queue_delayed_work(zd_workqueue, &tx->watchdog_work,
1079 ZD_TX_WATCHDOG_INTERVAL);
1080 tx->watchdog_enabled = 1;
1084 void zd_tx_watchdog_disable(struct zd_usb *usb)
1086 struct zd_usb_tx *tx = &usb->tx;
1088 if (tx->watchdog_enabled) {
1089 dev_dbg_f(zd_usb_dev(usb), "\n");
1090 tx->watchdog_enabled = 0;
1091 cancel_delayed_work_sync(&tx->watchdog_work);
1095 static void zd_rx_idle_timer_handler(struct work_struct *work)
1097 struct zd_usb *usb =
1098 container_of(work, struct zd_usb, rx.idle_work.work);
1099 struct zd_mac *mac = zd_usb_to_mac(usb);
1101 if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags))
1104 dev_dbg_f(zd_usb_dev(usb), "\n");
1106 /* 30 seconds since last rx, reset rx */
1107 zd_usb_reset_rx(usb);
1110 static void zd_usb_reset_rx_idle_timer_tasklet(unsigned long param)
1112 struct zd_usb *usb = (struct zd_usb *)param;
1114 zd_usb_reset_rx_idle_timer(usb);
1117 void zd_usb_reset_rx_idle_timer(struct zd_usb *usb)
1119 struct zd_usb_rx *rx = &usb->rx;
1121 cancel_delayed_work(&rx->idle_work);
1122 queue_delayed_work(zd_workqueue, &rx->idle_work, ZD_RX_IDLE_INTERVAL);
1125 static inline void init_usb_interrupt(struct zd_usb *usb)
1127 struct zd_usb_interrupt *intr = &usb->intr;
1129 spin_lock_init(&intr->lock);
1130 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
1131 init_completion(&intr->read_regs.completion);
1132 intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT);
1135 static inline void init_usb_rx(struct zd_usb *usb)
1137 struct zd_usb_rx *rx = &usb->rx;
1139 spin_lock_init(&rx->lock);
1140 mutex_init(&rx->setup_mutex);
1141 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
1142 rx->usb_packet_size = 512;
1144 rx->usb_packet_size = 64;
1146 ZD_ASSERT(rx->fragment_length == 0);
1147 INIT_DELAYED_WORK(&rx->idle_work, zd_rx_idle_timer_handler);
1148 rx->reset_timer_tasklet.func = zd_usb_reset_rx_idle_timer_tasklet;
1149 rx->reset_timer_tasklet.data = (unsigned long)usb;
1152 static inline void init_usb_tx(struct zd_usb *usb)
1154 struct zd_usb_tx *tx = &usb->tx;
1156 spin_lock_init(&tx->lock);
1157 atomic_set(&tx->enabled, 0);
1159 skb_queue_head_init(&tx->submitted_skbs);
1160 init_usb_anchor(&tx->submitted);
1161 tx->submitted_urbs = 0;
1162 tx->watchdog_enabled = 0;
1163 INIT_DELAYED_WORK(&tx->watchdog_work, zd_tx_watchdog_handler);
1166 void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
1167 struct usb_interface *intf)
1169 memset(usb, 0, sizeof(*usb));
1170 usb->intf = usb_get_intf(intf);
1171 usb_set_intfdata(usb->intf, hw);
1172 init_usb_anchor(&usb->submitted_cmds);
1173 init_usb_interrupt(usb);
1178 void zd_usb_clear(struct zd_usb *usb)
1180 usb_set_intfdata(usb->intf, NULL);
1181 usb_put_intf(usb->intf);
1182 ZD_MEMCLEAR(usb, sizeof(*usb));
1183 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
1186 static const char *speed(enum usb_device_speed speed)
1191 case USB_SPEED_FULL:
1193 case USB_SPEED_HIGH:
1196 return "unknown speed";
1200 static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
1202 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
1203 le16_to_cpu(udev->descriptor.idVendor),
1204 le16_to_cpu(udev->descriptor.idProduct),
1205 get_bcdDevice(udev),
1206 speed(udev->speed));
1209 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
1211 struct usb_device *udev = interface_to_usbdev(usb->intf);
1212 return scnprint_id(udev, buffer, size);
1216 static void print_id(struct usb_device *udev)
1220 scnprint_id(udev, buffer, sizeof(buffer));
1221 buffer[sizeof(buffer)-1] = 0;
1222 dev_dbg_f(&udev->dev, "%s\n", buffer);
1225 #define print_id(udev) do { } while (0)
1228 static int eject_installer(struct usb_interface *intf)
1230 struct usb_device *udev = interface_to_usbdev(intf);
1231 struct usb_host_interface *iface_desc = &intf->altsetting[0];
1232 struct usb_endpoint_descriptor *endpoint;
1237 /* Find bulk out endpoint */
1238 for (r = 1; r >= 0; r--) {
1239 endpoint = &iface_desc->endpoint[r].desc;
1240 if (usb_endpoint_dir_out(endpoint) &&
1241 usb_endpoint_xfer_bulk(endpoint)) {
1242 bulk_out_ep = endpoint->bEndpointAddress;
1248 "zd1211rw: Could not find bulk out endpoint\n");
1252 cmd = kzalloc(31, GFP_KERNEL);
1256 /* USB bulk command block */
1257 cmd[0] = 0x55; /* bulk command signature */
1258 cmd[1] = 0x53; /* bulk command signature */
1259 cmd[2] = 0x42; /* bulk command signature */
1260 cmd[3] = 0x43; /* bulk command signature */
1261 cmd[14] = 6; /* command length */
1263 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1264 cmd[19] = 0x2; /* eject disc */
1266 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
1267 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1268 cmd, 31, NULL, 2000);
1273 /* At this point, the device disconnects and reconnects with the real
1276 usb_set_intfdata(intf, NULL);
1280 int zd_usb_init_hw(struct zd_usb *usb)
1283 struct zd_mac *mac = zd_usb_to_mac(usb);
1285 dev_dbg_f(zd_usb_dev(usb), "\n");
1287 r = upload_firmware(usb);
1289 dev_err(zd_usb_dev(usb),
1290 "couldn't load firmware. Error number %d\n", r);
1294 r = usb_reset_configuration(zd_usb_to_usbdev(usb));
1296 dev_dbg_f(zd_usb_dev(usb),
1297 "couldn't reset configuration. Error number %d\n", r);
1301 r = zd_mac_init_hw(mac->hw);
1303 dev_dbg_f(zd_usb_dev(usb),
1304 "couldn't initialize mac. Error number %d\n", r);
1308 usb->initialized = 1;
1312 static int probe(struct usb_interface *intf, const struct usb_device_id *id)
1315 struct usb_device *udev = interface_to_usbdev(intf);
1317 struct ieee80211_hw *hw = NULL;
1321 if (id->driver_info & DEVICE_INSTALLER)
1322 return eject_installer(intf);
1324 switch (udev->speed) {
1326 case USB_SPEED_FULL:
1327 case USB_SPEED_HIGH:
1330 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
1335 r = usb_reset_device(udev);
1338 "couldn't reset usb device. Error number %d\n", r);
1342 hw = zd_mac_alloc_hw(intf);
1348 usb = &zd_hw_mac(hw)->chip.usb;
1349 usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0;
1351 r = zd_mac_preinit_hw(hw);
1353 dev_dbg_f(&intf->dev,
1354 "couldn't initialize mac. Error number %d\n", r);
1358 r = ieee80211_register_hw(hw);
1360 dev_dbg_f(&intf->dev,
1361 "couldn't register device. Error number %d\n", r);
1365 dev_dbg_f(&intf->dev, "successful\n");
1366 dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy));
1369 usb_reset_device(interface_to_usbdev(intf));
1371 zd_mac_clear(zd_hw_mac(hw));
1372 ieee80211_free_hw(hw);
1377 static void disconnect(struct usb_interface *intf)
1379 struct ieee80211_hw *hw = zd_intf_to_hw(intf);
1383 /* Either something really bad happened, or we're just dealing with
1384 * a DEVICE_INSTALLER. */
1388 mac = zd_hw_mac(hw);
1389 usb = &mac->chip.usb;
1391 dev_dbg_f(zd_usb_dev(usb), "\n");
1393 ieee80211_unregister_hw(hw);
1395 /* Just in case something has gone wrong! */
1396 zd_usb_disable_tx(usb);
1397 zd_usb_disable_rx(usb);
1398 zd_usb_disable_int(usb);
1400 /* If the disconnect has been caused by a removal of the
1401 * driver module, the reset allows reloading of the driver. If the
1402 * reset will not be executed here, the upload of the firmware in the
1403 * probe function caused by the reloading of the driver will fail.
1405 usb_reset_device(interface_to_usbdev(intf));
1408 ieee80211_free_hw(hw);
1409 dev_dbg(&intf->dev, "disconnected\n");
1412 static void zd_usb_resume(struct zd_usb *usb)
1414 struct zd_mac *mac = zd_usb_to_mac(usb);
1417 dev_dbg_f(zd_usb_dev(usb), "\n");
1419 r = zd_op_start(zd_usb_to_hw(usb));
1421 dev_warn(zd_usb_dev(usb), "Device resume failed "
1422 "with error code %d. Retrying...\n", r);
1423 if (usb->was_running)
1424 set_bit(ZD_DEVICE_RUNNING, &mac->flags);
1425 usb_queue_reset_device(usb->intf);
1429 if (mac->type != NL80211_IFTYPE_UNSPECIFIED) {
1430 r = zd_restore_settings(mac);
1432 dev_dbg(zd_usb_dev(usb),
1433 "failed to restore settings, %d\n", r);
1439 static void zd_usb_stop(struct zd_usb *usb)
1441 dev_dbg_f(zd_usb_dev(usb), "\n");
1443 zd_op_stop(zd_usb_to_hw(usb));
1445 zd_usb_disable_tx(usb);
1446 zd_usb_disable_rx(usb);
1447 zd_usb_disable_int(usb);
1449 usb->initialized = 0;
1452 static int pre_reset(struct usb_interface *intf)
1454 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1458 if (!hw || intf->condition != USB_INTERFACE_BOUND)
1461 mac = zd_hw_mac(hw);
1462 usb = &mac->chip.usb;
1464 usb->was_running = test_bit(ZD_DEVICE_RUNNING, &mac->flags);
1468 mutex_lock(&mac->chip.mutex);
1472 static int post_reset(struct usb_interface *intf)
1474 struct ieee80211_hw *hw = usb_get_intfdata(intf);
1478 if (!hw || intf->condition != USB_INTERFACE_BOUND)
1481 mac = zd_hw_mac(hw);
1482 usb = &mac->chip.usb;
1484 mutex_unlock(&mac->chip.mutex);
1486 if (usb->was_running)
1491 static struct usb_driver driver = {
1492 .name = KBUILD_MODNAME,
1493 .id_table = usb_ids,
1495 .disconnect = disconnect,
1496 .pre_reset = pre_reset,
1497 .post_reset = post_reset,
1500 struct workqueue_struct *zd_workqueue;
1502 static int __init usb_init(void)
1506 pr_debug("%s usb_init()\n", driver.name);
1508 zd_workqueue = create_singlethread_workqueue(driver.name);
1509 if (zd_workqueue == NULL) {
1510 printk(KERN_ERR "%s couldn't create workqueue\n", driver.name);
1514 r = usb_register(&driver);
1516 destroy_workqueue(zd_workqueue);
1517 printk(KERN_ERR "%s usb_register() failed. Error number %d\n",
1522 pr_debug("%s initialized\n", driver.name);
1526 static void __exit usb_exit(void)
1528 pr_debug("%s usb_exit()\n", driver.name);
1529 usb_deregister(&driver);
1530 destroy_workqueue(zd_workqueue);
1533 module_init(usb_init);
1534 module_exit(usb_exit);
1536 static int zd_ep_regs_out_msg(struct usb_device *udev, void *data, int len,
1537 int *actual_length, int timeout)
1539 /* In USB 2.0 mode EP_REGS_OUT endpoint is interrupt type. However in
1540 * USB 1.1 mode endpoint is bulk. Select correct type URB by endpoint
1543 struct usb_host_endpoint *ep;
1546 pipe = usb_sndintpipe(udev, EP_REGS_OUT);
1547 ep = usb_pipe_endpoint(udev, pipe);
1551 if (usb_endpoint_xfer_int(&ep->desc)) {
1552 return usb_interrupt_msg(udev, pipe, data, len,
1553 actual_length, timeout);
1555 pipe = usb_sndbulkpipe(udev, EP_REGS_OUT);
1556 return usb_bulk_msg(udev, pipe, data, len, actual_length,
1561 static int usb_int_regs_length(unsigned int count)
1563 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1566 static void prepare_read_regs_int(struct zd_usb *usb)
1568 struct zd_usb_interrupt *intr = &usb->intr;
1570 spin_lock_irq(&intr->lock);
1571 intr->read_regs_enabled = 1;
1572 INIT_COMPLETION(intr->read_regs.completion);
1573 spin_unlock_irq(&intr->lock);
1576 static void disable_read_regs_int(struct zd_usb *usb)
1578 struct zd_usb_interrupt *intr = &usb->intr;
1580 spin_lock_irq(&intr->lock);
1581 intr->read_regs_enabled = 0;
1582 spin_unlock_irq(&intr->lock);
1585 static int get_results(struct zd_usb *usb, u16 *values,
1586 struct usb_req_read_regs *req, unsigned int count)
1590 struct zd_usb_interrupt *intr = &usb->intr;
1591 struct read_regs_int *rr = &intr->read_regs;
1592 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1594 spin_lock_irq(&intr->lock);
1597 /* The created block size seems to be larger than expected.
1598 * However results appear to be correct.
1600 if (rr->length < usb_int_regs_length(count)) {
1601 dev_dbg_f(zd_usb_dev(usb),
1602 "error: actual length %d less than expected %d\n",
1603 rr->length, usb_int_regs_length(count));
1606 if (rr->length > sizeof(rr->buffer)) {
1607 dev_dbg_f(zd_usb_dev(usb),
1608 "error: actual length %d exceeds buffer size %zu\n",
1609 rr->length, sizeof(rr->buffer));
1613 for (i = 0; i < count; i++) {
1614 struct reg_data *rd = ®s->regs[i];
1615 if (rd->addr != req->addr[i]) {
1616 dev_dbg_f(zd_usb_dev(usb),
1617 "rd[%d] addr %#06hx expected %#06hx\n", i,
1618 le16_to_cpu(rd->addr),
1619 le16_to_cpu(req->addr[i]));
1622 values[i] = le16_to_cpu(rd->value);
1627 spin_unlock_irq(&intr->lock);
1631 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1632 const zd_addr_t *addresses, unsigned int count)
1635 int i, req_len, actual_req_len;
1636 struct usb_device *udev;
1637 struct usb_req_read_regs *req = NULL;
1638 unsigned long timeout;
1641 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1644 if (count > USB_MAX_IOREAD16_COUNT) {
1645 dev_dbg_f(zd_usb_dev(usb),
1646 "error: count %u exceeds possible max %u\n",
1647 count, USB_MAX_IOREAD16_COUNT);
1651 dev_dbg_f(zd_usb_dev(usb),
1652 "error: io in atomic context not supported\n");
1653 return -EWOULDBLOCK;
1655 if (!usb_int_enabled(usb)) {
1656 dev_dbg_f(zd_usb_dev(usb),
1657 "error: usb interrupt not enabled\n");
1658 return -EWOULDBLOCK;
1661 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1662 BUILD_BUG_ON(sizeof(struct usb_req_read_regs) + USB_MAX_IOREAD16_COUNT *
1663 sizeof(__le16) > sizeof(usb->req_buf));
1664 BUG_ON(sizeof(struct usb_req_read_regs) + count * sizeof(__le16) >
1665 sizeof(usb->req_buf));
1667 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1668 req = (void *)usb->req_buf;
1670 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1671 for (i = 0; i < count; i++)
1672 req->addr[i] = cpu_to_le16((u16)addresses[i]);
1674 udev = zd_usb_to_usbdev(usb);
1675 prepare_read_regs_int(usb);
1676 r = zd_ep_regs_out_msg(udev, req, req_len, &actual_req_len, 50 /*ms*/);
1678 dev_dbg_f(zd_usb_dev(usb),
1679 "error in zd_ep_regs_out_msg(). Error number %d\n", r);
1682 if (req_len != actual_req_len) {
1683 dev_dbg_f(zd_usb_dev(usb), "error in zd_ep_regs_out_msg()\n"
1684 " req_len %d != actual_req_len %d\n",
1685 req_len, actual_req_len);
1690 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1691 msecs_to_jiffies(50));
1693 disable_read_regs_int(usb);
1694 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1699 r = get_results(usb, values, req, count);
1704 static void iowrite16v_urb_complete(struct urb *urb)
1706 struct zd_usb *usb = urb->context;
1708 if (urb->status && !usb->cmd_error)
1709 usb->cmd_error = urb->status;
1711 if (!usb->cmd_error &&
1712 urb->actual_length != urb->transfer_buffer_length)
1713 usb->cmd_error = -EIO;
1716 static int zd_submit_waiting_urb(struct zd_usb *usb, bool last)
1719 struct urb *urb = usb->urb_async_waiting;
1724 usb->urb_async_waiting = NULL;
1727 urb->transfer_flags |= URB_NO_INTERRUPT;
1729 usb_anchor_urb(urb, &usb->submitted_cmds);
1730 r = usb_submit_urb(urb, GFP_KERNEL);
1732 usb_unanchor_urb(urb);
1733 dev_dbg_f(zd_usb_dev(usb),
1734 "error in usb_submit_urb(). Error number %d\n", r);
1738 /* fall-through with r == 0 */
1744 void zd_usb_iowrite16v_async_start(struct zd_usb *usb)
1746 ZD_ASSERT(usb_anchor_empty(&usb->submitted_cmds));
1747 ZD_ASSERT(usb->urb_async_waiting == NULL);
1748 ZD_ASSERT(!usb->in_async);
1750 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1754 usb->urb_async_waiting = NULL;
1757 int zd_usb_iowrite16v_async_end(struct zd_usb *usb, unsigned int timeout)
1761 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1762 ZD_ASSERT(usb->in_async);
1764 /* Submit last iowrite16v URB */
1765 r = zd_submit_waiting_urb(usb, true);
1767 dev_dbg_f(zd_usb_dev(usb),
1768 "error in zd_submit_waiting_usb(). "
1769 "Error number %d\n", r);
1771 usb_kill_anchored_urbs(&usb->submitted_cmds);
1776 timeout = usb_wait_anchor_empty_timeout(&usb->submitted_cmds,
1779 usb_kill_anchored_urbs(&usb->submitted_cmds);
1780 if (usb->cmd_error == -ENOENT) {
1781 dev_dbg_f(zd_usb_dev(usb), "timed out");
1793 int zd_usb_iowrite16v_async(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1797 struct usb_device *udev;
1798 struct usb_req_write_regs *req = NULL;
1801 struct usb_host_endpoint *ep;
1803 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1804 ZD_ASSERT(usb->in_async);
1808 if (count > USB_MAX_IOWRITE16_COUNT) {
1809 dev_dbg_f(zd_usb_dev(usb),
1810 "error: count %u exceeds possible max %u\n",
1811 count, USB_MAX_IOWRITE16_COUNT);
1815 dev_dbg_f(zd_usb_dev(usb),
1816 "error: io in atomic context not supported\n");
1817 return -EWOULDBLOCK;
1820 udev = zd_usb_to_usbdev(usb);
1822 ep = usb_pipe_endpoint(udev, usb_sndintpipe(udev, EP_REGS_OUT));
1826 urb = usb_alloc_urb(0, GFP_KERNEL);
1830 req_len = sizeof(struct usb_req_write_regs) +
1831 count * sizeof(struct reg_data);
1832 req = kmalloc(req_len, GFP_KERNEL);
1838 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1839 for (i = 0; i < count; i++) {
1840 struct reg_data *rw = &req->reg_writes[i];
1841 rw->addr = cpu_to_le16((u16)ioreqs[i].addr);
1842 rw->value = cpu_to_le16(ioreqs[i].value);
1845 /* In USB 2.0 mode endpoint is interrupt type. However in USB 1.1 mode
1846 * endpoint is bulk. Select correct type URB by endpoint descriptor.
1848 if (usb_endpoint_xfer_int(&ep->desc))
1849 usb_fill_int_urb(urb, udev, usb_sndintpipe(udev, EP_REGS_OUT),
1850 req, req_len, iowrite16v_urb_complete, usb,
1851 ep->desc.bInterval);
1853 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1854 req, req_len, iowrite16v_urb_complete, usb);
1856 urb->transfer_flags |= URB_FREE_BUFFER;
1858 /* Submit previous URB */
1859 r = zd_submit_waiting_urb(usb, false);
1861 dev_dbg_f(zd_usb_dev(usb),
1862 "error in zd_submit_waiting_usb(). "
1863 "Error number %d\n", r);
1867 /* Delay submit so that URB_NO_INTERRUPT flag can be set for all URBs
1868 * of currect batch except for very last.
1870 usb->urb_async_waiting = urb;
1877 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1882 zd_usb_iowrite16v_async_start(usb);
1883 r = zd_usb_iowrite16v_async(usb, ioreqs, count);
1885 zd_usb_iowrite16v_async_end(usb, 0);
1888 return zd_usb_iowrite16v_async_end(usb, 50 /* ms */);
1891 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1894 struct usb_device *udev;
1895 struct usb_req_rfwrite *req = NULL;
1896 int i, req_len, actual_req_len;
1897 u16 bit_value_template;
1900 dev_dbg_f(zd_usb_dev(usb),
1901 "error: io in atomic context not supported\n");
1902 return -EWOULDBLOCK;
1904 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1905 dev_dbg_f(zd_usb_dev(usb),
1906 "error: bits %d are smaller than"
1907 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1908 bits, USB_MIN_RFWRITE_BIT_COUNT);
1911 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1912 dev_dbg_f(zd_usb_dev(usb),
1913 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1914 bits, USB_MAX_RFWRITE_BIT_COUNT);
1918 if (value & (~0UL << bits)) {
1919 dev_dbg_f(zd_usb_dev(usb),
1920 "error: value %#09x has bits >= %d set\n",
1926 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1928 r = zd_usb_ioread16(usb, &bit_value_template, ZD_CR203);
1930 dev_dbg_f(zd_usb_dev(usb),
1931 "error %d: Couldn't read ZD_CR203\n", r);
1934 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1936 ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
1937 BUILD_BUG_ON(sizeof(struct usb_req_rfwrite) +
1938 USB_MAX_RFWRITE_BIT_COUNT * sizeof(__le16) >
1939 sizeof(usb->req_buf));
1940 BUG_ON(sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16) >
1941 sizeof(usb->req_buf));
1943 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1944 req = (void *)usb->req_buf;
1946 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1947 /* 1: 3683a, but not used in ZYDAS driver */
1948 req->value = cpu_to_le16(2);
1949 req->bits = cpu_to_le16(bits);
1951 for (i = 0; i < bits; i++) {
1952 u16 bv = bit_value_template;
1953 if (value & (1 << (bits-1-i)))
1955 req->bit_values[i] = cpu_to_le16(bv);
1958 udev = zd_usb_to_usbdev(usb);
1959 r = zd_ep_regs_out_msg(udev, req, req_len, &actual_req_len, 50 /*ms*/);
1961 dev_dbg_f(zd_usb_dev(usb),
1962 "error in zd_ep_regs_out_msg(). Error number %d\n", r);
1965 if (req_len != actual_req_len) {
1966 dev_dbg_f(zd_usb_dev(usb), "error in zd_ep_regs_out_msg()"
1967 " req_len %d != actual_req_len %d\n",
1968 req_len, actual_req_len);
1973 /* FALL-THROUGH with r == 0 */