3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/firmware.h>
21 #include <linux/device.h>
22 #include <linux/errno.h>
23 #include <linux/skbuff.h>
24 #include <linux/usb.h>
25 #include <linux/workqueue.h>
26 #include <net/mac80211.h>
27 #include <asm/unaligned.h>
33 static struct usb_device_id usb_ids[] = {
35 { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 },
36 { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 },
37 { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 },
38 { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 },
39 { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 },
40 { USB_DEVICE(0x0df6, 0x9075), .driver_info = DEVICE_ZD1211 },
41 { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 },
42 { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 },
43 { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 },
44 { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 },
45 { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 },
46 { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 },
47 { USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 },
48 { USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 },
49 { USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 },
50 { USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 },
51 { USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 },
52 { USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 },
53 { USB_DEVICE(0x13b1, 0x001e), .driver_info = DEVICE_ZD1211 },
54 { USB_DEVICE(0x0586, 0x3407), .driver_info = DEVICE_ZD1211 },
55 { USB_DEVICE(0x129b, 0x1666), .driver_info = DEVICE_ZD1211 },
57 { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
58 { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
59 { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
60 { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
61 { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B },
62 { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B },
63 { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B },
64 { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B },
65 { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B },
66 { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B },
67 { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B },
68 { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B },
69 { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B },
70 { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B },
71 { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B },
72 { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B },
73 { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B },
74 { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B },
75 { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B },
76 { USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B },
77 { USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B },
78 /* "Driverless" devices that need ejecting */
79 { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
80 { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER },
84 MODULE_LICENSE("GPL");
85 MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
86 MODULE_AUTHOR("Ulrich Kunitz");
87 MODULE_AUTHOR("Daniel Drake");
88 MODULE_VERSION("1.0");
89 MODULE_DEVICE_TABLE(usb, usb_ids);
91 #define FW_ZD1211_PREFIX "zd1211/zd1211_"
92 #define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
94 /* USB device initialization */
96 static int request_fw_file(
97 const struct firmware **fw, const char *name, struct device *device)
101 dev_dbg_f(device, "fw name %s\n", name);
103 r = request_firmware(fw, name, device);
106 "Could not load firmware file %s. Error number %d\n",
111 static inline u16 get_bcdDevice(const struct usb_device *udev)
113 return le16_to_cpu(udev->descriptor.bcdDevice);
116 enum upload_code_flags {
120 /* Ensures that MAX_TRANSFER_SIZE is even. */
121 #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
123 static int upload_code(struct usb_device *udev,
124 const u8 *data, size_t size, u16 code_offset, int flags)
129 /* USB request blocks need "kmalloced" buffers.
131 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
133 dev_err(&udev->dev, "out of memory\n");
140 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
141 size : MAX_TRANSFER_SIZE;
143 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
145 memcpy(p, data, transfer_size);
146 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
147 USB_REQ_FIRMWARE_DOWNLOAD,
148 USB_DIR_OUT | USB_TYPE_VENDOR,
149 code_offset, 0, p, transfer_size, 1000 /* ms */);
152 "USB control request for firmware upload"
153 " failed. Error number %d\n", r);
156 transfer_size = r & ~1;
158 size -= transfer_size;
159 data += transfer_size;
160 code_offset += transfer_size/sizeof(u16);
163 if (flags & REBOOT) {
166 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
167 USB_REQ_FIRMWARE_CONFIRM,
168 USB_DIR_IN | USB_TYPE_VENDOR,
169 0, 0, &ret, sizeof(ret), 5000 /* ms */);
170 if (r != sizeof(ret)) {
172 "control request firmeware confirmation failed."
173 " Return value %d\n", r);
180 "Internal error while downloading."
181 " Firmware confirm return value %#04x\n",
186 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
196 static u16 get_word(const void *data, u16 offset)
198 const __le16 *p = data;
199 return le16_to_cpu(p[offset]);
202 static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size,
205 scnprintf(buffer, size, "%s%s",
207 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
212 static int handle_version_mismatch(struct zd_usb *usb,
213 const struct firmware *ub_fw)
215 struct usb_device *udev = zd_usb_to_usbdev(usb);
216 const struct firmware *ur_fw = NULL;
221 r = request_fw_file(&ur_fw,
222 get_fw_name(usb, fw_name, sizeof(fw_name), "ur"),
227 r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT);
231 offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16));
232 r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
233 E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT);
235 /* At this point, the vendor driver downloads the whole firmware
236 * image, hacks around with version IDs, and uploads it again,
237 * completely overwriting the boot code. We do not do this here as
238 * it is not required on any tested devices, and it is suspected to
241 release_firmware(ur_fw);
245 static int upload_firmware(struct zd_usb *usb)
250 struct usb_device *udev = zd_usb_to_usbdev(usb);
251 const struct firmware *ub_fw = NULL;
252 const struct firmware *uph_fw = NULL;
255 bcdDevice = get_bcdDevice(udev);
257 r = request_fw_file(&ub_fw,
258 get_fw_name(usb, fw_name, sizeof(fw_name), "ub"),
263 fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET);
265 if (fw_bcdDevice != bcdDevice) {
267 "firmware version %#06x and device bootcode version "
268 "%#06x differ\n", fw_bcdDevice, bcdDevice);
269 if (bcdDevice <= 0x4313)
270 dev_warn(&udev->dev, "device has old bootcode, please "
271 "report success or failure\n");
273 r = handle_version_mismatch(usb, ub_fw);
277 dev_dbg_f(&udev->dev,
278 "firmware device id %#06x is equal to the "
279 "actual device id\n", fw_bcdDevice);
283 r = request_fw_file(&uph_fw,
284 get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"),
289 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT);
292 "Could not upload firmware code uph. Error number %d\n",
298 release_firmware(ub_fw);
299 release_firmware(uph_fw);
303 /* Read data from device address space using "firmware interface" which does
304 * not require firmware to be loaded. */
305 int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len)
308 struct usb_device *udev = zd_usb_to_usbdev(usb);
310 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
311 USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0,
315 "read over firmware interface failed: %d\n", r);
317 } else if (r != len) {
319 "incomplete read over firmware interface: %d/%d\n",
327 #define urb_dev(urb) (&(urb)->dev->dev)
329 static inline void handle_regs_int(struct urb *urb)
331 struct zd_usb *usb = urb->context;
332 struct zd_usb_interrupt *intr = &usb->intr;
335 ZD_ASSERT(in_interrupt());
336 spin_lock(&intr->lock);
338 if (intr->read_regs_enabled) {
339 intr->read_regs.length = len = urb->actual_length;
341 if (len > sizeof(intr->read_regs.buffer))
342 len = sizeof(intr->read_regs.buffer);
343 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
344 intr->read_regs_enabled = 0;
345 complete(&intr->read_regs.completion);
349 dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n");
351 spin_unlock(&intr->lock);
354 static void int_urb_complete(struct urb *urb)
357 struct usb_int_header *hdr;
359 switch (urb->status) {
373 if (urb->actual_length < sizeof(hdr)) {
374 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
378 hdr = urb->transfer_buffer;
379 if (hdr->type != USB_INT_TYPE) {
380 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
385 case USB_INT_ID_REGS:
386 handle_regs_int(urb);
388 case USB_INT_ID_RETRY_FAILED:
389 zd_mac_tx_failed(zd_usb_to_hw(urb->context));
392 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
393 (unsigned int)hdr->id);
398 r = usb_submit_urb(urb, GFP_ATOMIC);
400 dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
405 kfree(urb->transfer_buffer);
408 static inline int int_urb_interval(struct usb_device *udev)
410 switch (udev->speed) {
421 static inline int usb_int_enabled(struct zd_usb *usb)
424 struct zd_usb_interrupt *intr = &usb->intr;
427 spin_lock_irqsave(&intr->lock, flags);
429 spin_unlock_irqrestore(&intr->lock, flags);
433 int zd_usb_enable_int(struct zd_usb *usb)
436 struct usb_device *udev;
437 struct zd_usb_interrupt *intr = &usb->intr;
438 void *transfer_buffer = NULL;
441 dev_dbg_f(zd_usb_dev(usb), "\n");
443 urb = usb_alloc_urb(0, GFP_KERNEL);
449 ZD_ASSERT(!irqs_disabled());
450 spin_lock_irq(&intr->lock);
452 spin_unlock_irq(&intr->lock);
457 spin_unlock_irq(&intr->lock);
459 /* TODO: make it a DMA buffer */
461 transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_KERNEL);
462 if (!transfer_buffer) {
463 dev_dbg_f(zd_usb_dev(usb),
464 "couldn't allocate transfer_buffer\n");
465 goto error_set_urb_null;
468 udev = zd_usb_to_usbdev(usb);
469 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
470 transfer_buffer, USB_MAX_EP_INT_BUFFER,
471 int_urb_complete, usb,
474 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
475 r = usb_submit_urb(urb, GFP_KERNEL);
477 dev_dbg_f(zd_usb_dev(usb),
478 "Couldn't submit urb. Error number %d\n", r);
484 kfree(transfer_buffer);
486 spin_lock_irq(&intr->lock);
488 spin_unlock_irq(&intr->lock);
495 void zd_usb_disable_int(struct zd_usb *usb)
498 struct zd_usb_interrupt *intr = &usb->intr;
501 spin_lock_irqsave(&intr->lock, flags);
504 spin_unlock_irqrestore(&intr->lock, flags);
508 spin_unlock_irqrestore(&intr->lock, flags);
511 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
515 static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
519 const struct rx_length_info *length_info;
521 if (length < sizeof(struct rx_length_info)) {
522 /* It's not a complete packet anyhow. */
525 length_info = (struct rx_length_info *)
526 (buffer + length - sizeof(struct rx_length_info));
528 /* It might be that three frames are merged into a single URB
529 * transaction. We have to check for the length info tag.
531 * While testing we discovered that length_info might be unaligned,
532 * because if USB transactions are merged, the last packet will not
533 * be padded. Unaligned access might also happen if the length_info
534 * structure is not present.
536 if (get_unaligned(&length_info->tag) == cpu_to_le16(RX_LENGTH_INFO_TAG))
538 unsigned int l, k, n;
539 for (i = 0, l = 0;; i++) {
540 k = le16_to_cpu(get_unaligned(&length_info->length[i]));
546 zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k);
552 zd_mac_rx(zd_usb_to_hw(usb), buffer, length);
556 static void rx_urb_complete(struct urb *urb)
559 struct zd_usb_rx *rx;
563 switch (urb->status) {
574 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
578 buffer = urb->transfer_buffer;
579 length = urb->actual_length;
583 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
584 /* If there is an old first fragment, we don't care. */
585 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
586 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
587 spin_lock(&rx->lock);
588 memcpy(rx->fragment, buffer, length);
589 rx->fragment_length = length;
590 spin_unlock(&rx->lock);
594 spin_lock(&rx->lock);
595 if (rx->fragment_length > 0) {
596 /* We are on a second fragment, we believe */
597 ZD_ASSERT(length + rx->fragment_length <=
598 ARRAY_SIZE(rx->fragment));
599 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
600 memcpy(rx->fragment+rx->fragment_length, buffer, length);
601 handle_rx_packet(usb, rx->fragment,
602 rx->fragment_length + length);
603 rx->fragment_length = 0;
604 spin_unlock(&rx->lock);
606 spin_unlock(&rx->lock);
607 handle_rx_packet(usb, buffer, length);
611 usb_submit_urb(urb, GFP_ATOMIC);
614 static struct urb *alloc_rx_urb(struct zd_usb *usb)
616 struct usb_device *udev = zd_usb_to_usbdev(usb);
620 urb = usb_alloc_urb(0, GFP_KERNEL);
623 buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_KERNEL,
630 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
631 buffer, USB_MAX_RX_SIZE,
632 rx_urb_complete, usb);
633 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
638 static void free_rx_urb(struct urb *urb)
642 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
643 urb->transfer_buffer, urb->transfer_dma);
647 int zd_usb_enable_rx(struct zd_usb *usb)
650 struct zd_usb_rx *rx = &usb->rx;
653 dev_dbg_f(zd_usb_dev(usb), "\n");
656 urbs = kcalloc(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL);
659 for (i = 0; i < RX_URBS_COUNT; i++) {
660 urbs[i] = alloc_rx_urb(usb);
665 ZD_ASSERT(!irqs_disabled());
666 spin_lock_irq(&rx->lock);
668 spin_unlock_irq(&rx->lock);
673 rx->urbs_count = RX_URBS_COUNT;
674 spin_unlock_irq(&rx->lock);
676 for (i = 0; i < RX_URBS_COUNT; i++) {
677 r = usb_submit_urb(urbs[i], GFP_KERNEL);
684 for (i = 0; i < RX_URBS_COUNT; i++) {
685 usb_kill_urb(urbs[i]);
687 spin_lock_irq(&rx->lock);
690 spin_unlock_irq(&rx->lock);
693 for (i = 0; i < RX_URBS_COUNT; i++)
694 free_rx_urb(urbs[i]);
699 void zd_usb_disable_rx(struct zd_usb *usb)
705 struct zd_usb_rx *rx = &usb->rx;
707 spin_lock_irqsave(&rx->lock, flags);
709 count = rx->urbs_count;
710 spin_unlock_irqrestore(&rx->lock, flags);
714 for (i = 0; i < count; i++) {
715 usb_kill_urb(urbs[i]);
716 free_rx_urb(urbs[i]);
720 spin_lock_irqsave(&rx->lock, flags);
723 spin_unlock_irqrestore(&rx->lock, flags);
727 * zd_usb_disable_tx - disable transmission
728 * @usb: the zd1211rw-private USB structure
730 * Frees all URBs in the free list and marks the transmission as disabled.
732 void zd_usb_disable_tx(struct zd_usb *usb)
734 struct zd_usb_tx *tx = &usb->tx;
736 struct list_head *pos, *n;
738 spin_lock_irqsave(&tx->lock, flags);
739 list_for_each_safe(pos, n, &tx->free_urb_list) {
741 usb_free_urb(list_entry(pos, struct urb, urb_list));
744 tx->submitted_urbs = 0;
745 /* The stopped state is ignored, relying on ieee80211_wake_queues()
746 * in a potentionally following zd_usb_enable_tx().
748 spin_unlock_irqrestore(&tx->lock, flags);
752 * zd_usb_enable_tx - enables transmission
753 * @usb: a &struct zd_usb pointer
755 * This function enables transmission and prepares the &zd_usb_tx data
758 void zd_usb_enable_tx(struct zd_usb *usb)
761 struct zd_usb_tx *tx = &usb->tx;
763 spin_lock_irqsave(&tx->lock, flags);
765 tx->submitted_urbs = 0;
766 ieee80211_wake_queues(zd_usb_to_hw(usb));
768 spin_unlock_irqrestore(&tx->lock, flags);
772 * alloc_tx_urb - provides an tx URB
773 * @usb: a &struct zd_usb pointer
775 * Allocates a new URB. If possible takes the urb from the free list in
778 static struct urb *alloc_tx_urb(struct zd_usb *usb)
780 struct zd_usb_tx *tx = &usb->tx;
782 struct list_head *entry;
785 spin_lock_irqsave(&tx->lock, flags);
786 if (list_empty(&tx->free_urb_list)) {
787 urb = usb_alloc_urb(0, GFP_ATOMIC);
790 entry = tx->free_urb_list.next;
792 urb = list_entry(entry, struct urb, urb_list);
794 spin_unlock_irqrestore(&tx->lock, flags);
799 * free_tx_urb - frees a used tx URB
800 * @usb: a &struct zd_usb pointer
801 * @urb: URB to be freed
803 * Frees the the transmission URB, which means to put it on the free URB
806 static void free_tx_urb(struct zd_usb *usb, struct urb *urb)
808 struct zd_usb_tx *tx = &usb->tx;
811 spin_lock_irqsave(&tx->lock, flags);
816 list_add(&urb->urb_list, &tx->free_urb_list);
818 spin_unlock_irqrestore(&tx->lock, flags);
821 static void tx_dec_submitted_urbs(struct zd_usb *usb)
823 struct zd_usb_tx *tx = &usb->tx;
826 spin_lock_irqsave(&tx->lock, flags);
827 --tx->submitted_urbs;
828 if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) {
829 ieee80211_wake_queues(zd_usb_to_hw(usb));
832 spin_unlock_irqrestore(&tx->lock, flags);
835 static void tx_inc_submitted_urbs(struct zd_usb *usb)
837 struct zd_usb_tx *tx = &usb->tx;
840 spin_lock_irqsave(&tx->lock, flags);
841 ++tx->submitted_urbs;
842 if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) {
843 ieee80211_stop_queues(zd_usb_to_hw(usb));
846 spin_unlock_irqrestore(&tx->lock, flags);
850 * tx_urb_complete - completes the execution of an URB
853 * This function is called if the URB has been transferred to a device or an
854 * error has happened.
856 static void tx_urb_complete(struct urb *urb)
860 struct zd_tx_skb_control_block *cb;
863 switch (urb->status) {
872 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
875 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
879 skb = (struct sk_buff *)urb->context;
880 zd_mac_tx_to_dev(skb, urb->status);
881 cb = (struct zd_tx_skb_control_block *)skb->cb;
882 usb = &zd_hw_mac(cb->hw)->chip.usb;
883 free_tx_urb(usb, urb);
884 tx_dec_submitted_urbs(usb);
887 r = usb_submit_urb(urb, GFP_ATOMIC);
889 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
895 * zd_usb_tx: initiates transfer of a frame of the device
897 * @usb: the zd1211rw-private USB structure
898 * @skb: a &struct sk_buff pointer
900 * This function tranmits a frame to the device. It doesn't wait for
901 * completion. The frame must contain the control set and have all the
902 * control set information available.
904 * The function returns 0 if the transfer has been successfully initiated.
906 int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb)
909 struct usb_device *udev = zd_usb_to_usbdev(usb);
912 urb = alloc_tx_urb(usb);
918 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
919 skb->data, skb->len, tx_urb_complete, skb);
921 r = usb_submit_urb(urb, GFP_ATOMIC);
924 tx_inc_submitted_urbs(usb);
927 free_tx_urb(usb, urb);
932 static inline void init_usb_interrupt(struct zd_usb *usb)
934 struct zd_usb_interrupt *intr = &usb->intr;
936 spin_lock_init(&intr->lock);
937 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
938 init_completion(&intr->read_regs.completion);
939 intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT);
942 static inline void init_usb_rx(struct zd_usb *usb)
944 struct zd_usb_rx *rx = &usb->rx;
945 spin_lock_init(&rx->lock);
946 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
947 rx->usb_packet_size = 512;
949 rx->usb_packet_size = 64;
951 ZD_ASSERT(rx->fragment_length == 0);
954 static inline void init_usb_tx(struct zd_usb *usb)
956 struct zd_usb_tx *tx = &usb->tx;
957 spin_lock_init(&tx->lock);
960 INIT_LIST_HEAD(&tx->free_urb_list);
961 tx->submitted_urbs = 0;
964 void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
965 struct usb_interface *intf)
967 memset(usb, 0, sizeof(*usb));
968 usb->intf = usb_get_intf(intf);
969 usb_set_intfdata(usb->intf, hw);
970 init_usb_interrupt(usb);
975 void zd_usb_clear(struct zd_usb *usb)
977 usb_set_intfdata(usb->intf, NULL);
978 usb_put_intf(usb->intf);
979 ZD_MEMCLEAR(usb, sizeof(*usb));
980 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
983 static const char *speed(enum usb_device_speed speed)
993 return "unknown speed";
997 static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
999 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
1000 le16_to_cpu(udev->descriptor.idVendor),
1001 le16_to_cpu(udev->descriptor.idProduct),
1002 get_bcdDevice(udev),
1003 speed(udev->speed));
1006 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
1008 struct usb_device *udev = interface_to_usbdev(usb->intf);
1009 return scnprint_id(udev, buffer, size);
1013 static void print_id(struct usb_device *udev)
1017 scnprint_id(udev, buffer, sizeof(buffer));
1018 buffer[sizeof(buffer)-1] = 0;
1019 dev_dbg_f(&udev->dev, "%s\n", buffer);
1022 #define print_id(udev) do { } while (0)
1025 static int eject_installer(struct usb_interface *intf)
1027 struct usb_device *udev = interface_to_usbdev(intf);
1028 struct usb_host_interface *iface_desc = &intf->altsetting[0];
1029 struct usb_endpoint_descriptor *endpoint;
1034 /* Find bulk out endpoint */
1035 endpoint = &iface_desc->endpoint[1].desc;
1036 if ((endpoint->bEndpointAddress & USB_TYPE_MASK) == USB_DIR_OUT &&
1037 (endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
1038 USB_ENDPOINT_XFER_BULK) {
1039 bulk_out_ep = endpoint->bEndpointAddress;
1042 "zd1211rw: Could not find bulk out endpoint\n");
1046 cmd = kzalloc(31, GFP_KERNEL);
1050 /* USB bulk command block */
1051 cmd[0] = 0x55; /* bulk command signature */
1052 cmd[1] = 0x53; /* bulk command signature */
1053 cmd[2] = 0x42; /* bulk command signature */
1054 cmd[3] = 0x43; /* bulk command signature */
1055 cmd[14] = 6; /* command length */
1057 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
1058 cmd[19] = 0x2; /* eject disc */
1060 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
1061 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
1062 cmd, 31, NULL, 2000);
1067 /* At this point, the device disconnects and reconnects with the real
1070 usb_set_intfdata(intf, NULL);
1074 int zd_usb_init_hw(struct zd_usb *usb)
1077 struct zd_mac *mac = zd_usb_to_mac(usb);
1079 dev_dbg_f(zd_usb_dev(usb), "\n");
1081 r = upload_firmware(usb);
1083 dev_err(zd_usb_dev(usb),
1084 "couldn't load firmware. Error number %d\n", r);
1088 r = usb_reset_configuration(zd_usb_to_usbdev(usb));
1090 dev_dbg_f(zd_usb_dev(usb),
1091 "couldn't reset configuration. Error number %d\n", r);
1095 r = zd_mac_init_hw(mac->hw);
1097 dev_dbg_f(zd_usb_dev(usb),
1098 "couldn't initialize mac. Error number %d\n", r);
1102 usb->initialized = 1;
1106 static int probe(struct usb_interface *intf, const struct usb_device_id *id)
1109 struct usb_device *udev = interface_to_usbdev(intf);
1111 struct ieee80211_hw *hw = NULL;
1115 if (id->driver_info & DEVICE_INSTALLER)
1116 return eject_installer(intf);
1118 switch (udev->speed) {
1120 case USB_SPEED_FULL:
1121 case USB_SPEED_HIGH:
1124 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
1129 r = usb_reset_device(udev);
1132 "couldn't reset usb device. Error number %d\n", r);
1136 hw = zd_mac_alloc_hw(intf);
1142 usb = &zd_hw_mac(hw)->chip.usb;
1143 usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0;
1145 r = zd_mac_preinit_hw(hw);
1147 dev_dbg_f(&intf->dev,
1148 "couldn't initialize mac. Error number %d\n", r);
1152 r = ieee80211_register_hw(hw);
1154 dev_dbg_f(&intf->dev,
1155 "couldn't register device. Error number %d\n", r);
1159 dev_dbg_f(&intf->dev, "successful\n");
1160 dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy));
1163 usb_reset_device(interface_to_usbdev(intf));
1165 zd_mac_clear(zd_hw_mac(hw));
1166 ieee80211_free_hw(hw);
1171 static void disconnect(struct usb_interface *intf)
1173 struct ieee80211_hw *hw = zd_intf_to_hw(intf);
1177 /* Either something really bad happened, or we're just dealing with
1178 * a DEVICE_INSTALLER. */
1182 mac = zd_hw_mac(hw);
1183 usb = &mac->chip.usb;
1185 dev_dbg_f(zd_usb_dev(usb), "\n");
1187 ieee80211_unregister_hw(hw);
1189 /* Just in case something has gone wrong! */
1190 zd_usb_disable_rx(usb);
1191 zd_usb_disable_int(usb);
1193 /* If the disconnect has been caused by a removal of the
1194 * driver module, the reset allows reloading of the driver. If the
1195 * reset will not be executed here, the upload of the firmware in the
1196 * probe function caused by the reloading of the driver will fail.
1198 usb_reset_device(interface_to_usbdev(intf));
1201 ieee80211_free_hw(hw);
1202 dev_dbg(&intf->dev, "disconnected\n");
1205 static struct usb_driver driver = {
1206 .name = KBUILD_MODNAME,
1207 .id_table = usb_ids,
1209 .disconnect = disconnect,
1212 struct workqueue_struct *zd_workqueue;
1214 static int __init usb_init(void)
1218 pr_debug("%s usb_init()\n", driver.name);
1220 zd_workqueue = create_singlethread_workqueue(driver.name);
1221 if (zd_workqueue == NULL) {
1222 printk(KERN_ERR "%s couldn't create workqueue\n", driver.name);
1226 r = usb_register(&driver);
1228 destroy_workqueue(zd_workqueue);
1229 printk(KERN_ERR "%s usb_register() failed. Error number %d\n",
1234 pr_debug("%s initialized\n", driver.name);
1238 static void __exit usb_exit(void)
1240 pr_debug("%s usb_exit()\n", driver.name);
1241 usb_deregister(&driver);
1242 destroy_workqueue(zd_workqueue);
1245 module_init(usb_init);
1246 module_exit(usb_exit);
1248 static int usb_int_regs_length(unsigned int count)
1250 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1253 static void prepare_read_regs_int(struct zd_usb *usb)
1255 struct zd_usb_interrupt *intr = &usb->intr;
1257 spin_lock_irq(&intr->lock);
1258 intr->read_regs_enabled = 1;
1259 INIT_COMPLETION(intr->read_regs.completion);
1260 spin_unlock_irq(&intr->lock);
1263 static void disable_read_regs_int(struct zd_usb *usb)
1265 struct zd_usb_interrupt *intr = &usb->intr;
1267 spin_lock_irq(&intr->lock);
1268 intr->read_regs_enabled = 0;
1269 spin_unlock_irq(&intr->lock);
1272 static int get_results(struct zd_usb *usb, u16 *values,
1273 struct usb_req_read_regs *req, unsigned int count)
1277 struct zd_usb_interrupt *intr = &usb->intr;
1278 struct read_regs_int *rr = &intr->read_regs;
1279 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1281 spin_lock_irq(&intr->lock);
1284 /* The created block size seems to be larger than expected.
1285 * However results appear to be correct.
1287 if (rr->length < usb_int_regs_length(count)) {
1288 dev_dbg_f(zd_usb_dev(usb),
1289 "error: actual length %d less than expected %d\n",
1290 rr->length, usb_int_regs_length(count));
1293 if (rr->length > sizeof(rr->buffer)) {
1294 dev_dbg_f(zd_usb_dev(usb),
1295 "error: actual length %d exceeds buffer size %zu\n",
1296 rr->length, sizeof(rr->buffer));
1300 for (i = 0; i < count; i++) {
1301 struct reg_data *rd = ®s->regs[i];
1302 if (rd->addr != req->addr[i]) {
1303 dev_dbg_f(zd_usb_dev(usb),
1304 "rd[%d] addr %#06hx expected %#06hx\n", i,
1305 le16_to_cpu(rd->addr),
1306 le16_to_cpu(req->addr[i]));
1309 values[i] = le16_to_cpu(rd->value);
1314 spin_unlock_irq(&intr->lock);
1318 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1319 const zd_addr_t *addresses, unsigned int count)
1322 int i, req_len, actual_req_len;
1323 struct usb_device *udev;
1324 struct usb_req_read_regs *req = NULL;
1325 unsigned long timeout;
1328 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1331 if (count > USB_MAX_IOREAD16_COUNT) {
1332 dev_dbg_f(zd_usb_dev(usb),
1333 "error: count %u exceeds possible max %u\n",
1334 count, USB_MAX_IOREAD16_COUNT);
1338 dev_dbg_f(zd_usb_dev(usb),
1339 "error: io in atomic context not supported\n");
1340 return -EWOULDBLOCK;
1342 if (!usb_int_enabled(usb)) {
1343 dev_dbg_f(zd_usb_dev(usb),
1344 "error: usb interrupt not enabled\n");
1345 return -EWOULDBLOCK;
1348 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1349 req = kmalloc(req_len, GFP_KERNEL);
1352 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1353 for (i = 0; i < count; i++)
1354 req->addr[i] = cpu_to_le16((u16)addresses[i]);
1356 udev = zd_usb_to_usbdev(usb);
1357 prepare_read_regs_int(usb);
1358 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1359 req, req_len, &actual_req_len, 1000 /* ms */);
1361 dev_dbg_f(zd_usb_dev(usb),
1362 "error in usb_bulk_msg(). Error number %d\n", r);
1365 if (req_len != actual_req_len) {
1366 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1367 " req_len %d != actual_req_len %d\n",
1368 req_len, actual_req_len);
1373 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1374 msecs_to_jiffies(1000));
1376 disable_read_regs_int(usb);
1377 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1382 r = get_results(usb, values, req, count);
1388 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1392 struct usb_device *udev;
1393 struct usb_req_write_regs *req = NULL;
1394 int i, req_len, actual_req_len;
1398 if (count > USB_MAX_IOWRITE16_COUNT) {
1399 dev_dbg_f(zd_usb_dev(usb),
1400 "error: count %u exceeds possible max %u\n",
1401 count, USB_MAX_IOWRITE16_COUNT);
1405 dev_dbg_f(zd_usb_dev(usb),
1406 "error: io in atomic context not supported\n");
1407 return -EWOULDBLOCK;
1410 req_len = sizeof(struct usb_req_write_regs) +
1411 count * sizeof(struct reg_data);
1412 req = kmalloc(req_len, GFP_KERNEL);
1416 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1417 for (i = 0; i < count; i++) {
1418 struct reg_data *rw = &req->reg_writes[i];
1419 rw->addr = cpu_to_le16((u16)ioreqs[i].addr);
1420 rw->value = cpu_to_le16(ioreqs[i].value);
1423 udev = zd_usb_to_usbdev(usb);
1424 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1425 req, req_len, &actual_req_len, 1000 /* ms */);
1427 dev_dbg_f(zd_usb_dev(usb),
1428 "error in usb_bulk_msg(). Error number %d\n", r);
1431 if (req_len != actual_req_len) {
1432 dev_dbg_f(zd_usb_dev(usb),
1433 "error in usb_bulk_msg()"
1434 " req_len %d != actual_req_len %d\n",
1435 req_len, actual_req_len);
1440 /* FALL-THROUGH with r == 0 */
1446 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1449 struct usb_device *udev;
1450 struct usb_req_rfwrite *req = NULL;
1451 int i, req_len, actual_req_len;
1452 u16 bit_value_template;
1455 dev_dbg_f(zd_usb_dev(usb),
1456 "error: io in atomic context not supported\n");
1457 return -EWOULDBLOCK;
1459 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1460 dev_dbg_f(zd_usb_dev(usb),
1461 "error: bits %d are smaller than"
1462 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1463 bits, USB_MIN_RFWRITE_BIT_COUNT);
1466 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1467 dev_dbg_f(zd_usb_dev(usb),
1468 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1469 bits, USB_MAX_RFWRITE_BIT_COUNT);
1473 if (value & (~0UL << bits)) {
1474 dev_dbg_f(zd_usb_dev(usb),
1475 "error: value %#09x has bits >= %d set\n",
1481 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1483 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1485 dev_dbg_f(zd_usb_dev(usb),
1486 "error %d: Couldn't read CR203\n", r);
1489 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1491 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1492 req = kmalloc(req_len, GFP_KERNEL);
1496 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1497 /* 1: 3683a, but not used in ZYDAS driver */
1498 req->value = cpu_to_le16(2);
1499 req->bits = cpu_to_le16(bits);
1501 for (i = 0; i < bits; i++) {
1502 u16 bv = bit_value_template;
1503 if (value & (1 << (bits-1-i)))
1505 req->bit_values[i] = cpu_to_le16(bv);
1508 udev = zd_usb_to_usbdev(usb);
1509 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1510 req, req_len, &actual_req_len, 1000 /* ms */);
1512 dev_dbg_f(zd_usb_dev(usb),
1513 "error in usb_bulk_msg(). Error number %d\n", r);
1516 if (req_len != actual_req_len) {
1517 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1518 " req_len %d != actual_req_len %d\n",
1519 req_len, actual_req_len);
1524 /* FALL-THROUGH with r == 0 */