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 <asm/unaligned.h>
19 #include <linux/kernel.h>
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/firmware.h>
23 #include <linux/device.h>
24 #include <linux/errno.h>
25 #include <linux/skbuff.h>
26 #include <linux/usb.h>
27 #include <linux/workqueue.h>
28 #include <net/ieee80211.h>
31 #include "zd_netdev.h"
36 static struct usb_device_id usb_ids[] = {
38 { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 },
39 { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 },
40 { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 },
41 { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 },
42 { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 },
43 { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 },
44 { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 },
45 { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 },
46 { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 },
47 { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 },
48 { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 },
49 { USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 },
50 { USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 },
51 { USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 },
52 { USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 },
53 { USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 },
54 { USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 },
56 { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
57 { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
58 { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
59 { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
60 { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B },
61 { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B },
62 { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B },
63 { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B },
64 { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B },
65 { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B },
66 /* "Driverless" devices that need ejecting */
67 { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
71 MODULE_LICENSE("GPL");
72 MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
73 MODULE_AUTHOR("Ulrich Kunitz");
74 MODULE_AUTHOR("Daniel Drake");
75 MODULE_VERSION("1.0");
76 MODULE_DEVICE_TABLE(usb, usb_ids);
78 #define FW_ZD1211_PREFIX "zd1211/zd1211_"
79 #define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
81 /* USB device initialization */
83 static int request_fw_file(
84 const struct firmware **fw, const char *name, struct device *device)
88 dev_dbg_f(device, "fw name %s\n", name);
90 r = request_firmware(fw, name, device);
93 "Could not load firmware file %s. Error number %d\n",
98 static inline u16 get_bcdDevice(const struct usb_device *udev)
100 return le16_to_cpu(udev->descriptor.bcdDevice);
103 enum upload_code_flags {
107 /* Ensures that MAX_TRANSFER_SIZE is even. */
108 #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
110 static int upload_code(struct usb_device *udev,
111 const u8 *data, size_t size, u16 code_offset, int flags)
116 /* USB request blocks need "kmalloced" buffers.
118 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
120 dev_err(&udev->dev, "out of memory\n");
127 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
128 size : MAX_TRANSFER_SIZE;
130 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
132 memcpy(p, data, transfer_size);
133 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
134 USB_REQ_FIRMWARE_DOWNLOAD,
135 USB_DIR_OUT | USB_TYPE_VENDOR,
136 code_offset, 0, p, transfer_size, 1000 /* ms */);
139 "USB control request for firmware upload"
140 " failed. Error number %d\n", r);
143 transfer_size = r & ~1;
145 size -= transfer_size;
146 data += transfer_size;
147 code_offset += transfer_size/sizeof(u16);
150 if (flags & REBOOT) {
153 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
154 USB_REQ_FIRMWARE_CONFIRM,
155 USB_DIR_IN | USB_TYPE_VENDOR,
156 0, 0, &ret, sizeof(ret), 5000 /* ms */);
157 if (r != sizeof(ret)) {
159 "control request firmeware confirmation failed."
160 " Return value %d\n", r);
167 "Internal error while downloading."
168 " Firmware confirm return value %#04x\n",
173 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
183 static u16 get_word(const void *data, u16 offset)
185 const __le16 *p = data;
186 return le16_to_cpu(p[offset]);
189 static char *get_fw_name(char *buffer, size_t size, u8 device_type,
192 scnprintf(buffer, size, "%s%s",
193 device_type == DEVICE_ZD1211B ?
194 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
199 static int handle_version_mismatch(struct usb_device *udev, u8 device_type,
200 const struct firmware *ub_fw)
202 const struct firmware *ur_fw = NULL;
207 r = request_fw_file(&ur_fw,
208 get_fw_name(fw_name, sizeof(fw_name), device_type, "ur"),
213 r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT);
217 offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16));
218 r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
219 E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT);
221 /* At this point, the vendor driver downloads the whole firmware
222 * image, hacks around with version IDs, and uploads it again,
223 * completely overwriting the boot code. We do not do this here as
224 * it is not required on any tested devices, and it is suspected to
227 release_firmware(ur_fw);
231 static int upload_firmware(struct usb_device *udev, u8 device_type)
236 const struct firmware *ub_fw = NULL;
237 const struct firmware *uph_fw = NULL;
240 bcdDevice = get_bcdDevice(udev);
242 r = request_fw_file(&ub_fw,
243 get_fw_name(fw_name, sizeof(fw_name), device_type, "ub"),
248 fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET);
250 if (fw_bcdDevice != bcdDevice) {
252 "firmware version %#06x and device bootcode version "
253 "%#06x differ\n", fw_bcdDevice, bcdDevice);
254 if (bcdDevice <= 0x4313)
255 dev_warn(&udev->dev, "device has old bootcode, please "
256 "report success or failure\n");
258 r = handle_version_mismatch(udev, device_type, ub_fw);
262 dev_dbg_f(&udev->dev,
263 "firmware device id %#06x is equal to the "
264 "actual device id\n", fw_bcdDevice);
268 r = request_fw_file(&uph_fw,
269 get_fw_name(fw_name, sizeof(fw_name), device_type, "uphr"),
274 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT);
277 "Could not upload firmware code uph. Error number %d\n",
283 release_firmware(ub_fw);
284 release_firmware(uph_fw);
288 #define urb_dev(urb) (&(urb)->dev->dev)
290 static inline void handle_regs_int(struct urb *urb)
292 struct zd_usb *usb = urb->context;
293 struct zd_usb_interrupt *intr = &usb->intr;
296 ZD_ASSERT(in_interrupt());
297 spin_lock(&intr->lock);
299 if (intr->read_regs_enabled) {
300 intr->read_regs.length = len = urb->actual_length;
302 if (len > sizeof(intr->read_regs.buffer))
303 len = sizeof(intr->read_regs.buffer);
304 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
305 intr->read_regs_enabled = 0;
306 complete(&intr->read_regs.completion);
310 dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n");
312 spin_unlock(&intr->lock);
315 static inline void handle_retry_failed_int(struct urb *urb)
317 struct zd_usb *usb = urb->context;
318 struct zd_mac *mac = zd_usb_to_mac(usb);
319 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
321 ieee->stats.tx_errors++;
322 ieee->ieee_stats.tx_retry_limit_exceeded++;
323 dev_dbg_f(urb_dev(urb), "retry failed interrupt\n");
327 static void int_urb_complete(struct urb *urb)
330 struct usb_int_header *hdr;
332 switch (urb->status) {
346 if (urb->actual_length < sizeof(hdr)) {
347 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
351 hdr = urb->transfer_buffer;
352 if (hdr->type != USB_INT_TYPE) {
353 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
358 case USB_INT_ID_REGS:
359 handle_regs_int(urb);
361 case USB_INT_ID_RETRY_FAILED:
362 handle_retry_failed_int(urb);
365 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
366 (unsigned int)hdr->id);
371 r = usb_submit_urb(urb, GFP_ATOMIC);
373 dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
378 kfree(urb->transfer_buffer);
381 static inline int int_urb_interval(struct usb_device *udev)
383 switch (udev->speed) {
394 static inline int usb_int_enabled(struct zd_usb *usb)
397 struct zd_usb_interrupt *intr = &usb->intr;
400 spin_lock_irqsave(&intr->lock, flags);
402 spin_unlock_irqrestore(&intr->lock, flags);
406 int zd_usb_enable_int(struct zd_usb *usb)
409 struct usb_device *udev;
410 struct zd_usb_interrupt *intr = &usb->intr;
411 void *transfer_buffer = NULL;
414 dev_dbg_f(zd_usb_dev(usb), "\n");
416 urb = usb_alloc_urb(0, GFP_NOFS);
422 ZD_ASSERT(!irqs_disabled());
423 spin_lock_irq(&intr->lock);
425 spin_unlock_irq(&intr->lock);
430 spin_unlock_irq(&intr->lock);
432 /* TODO: make it a DMA buffer */
434 transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_NOFS);
435 if (!transfer_buffer) {
436 dev_dbg_f(zd_usb_dev(usb),
437 "couldn't allocate transfer_buffer\n");
438 goto error_set_urb_null;
441 udev = zd_usb_to_usbdev(usb);
442 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
443 transfer_buffer, USB_MAX_EP_INT_BUFFER,
444 int_urb_complete, usb,
447 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
448 r = usb_submit_urb(urb, GFP_NOFS);
450 dev_dbg_f(zd_usb_dev(usb),
451 "Couldn't submit urb. Error number %d\n", r);
457 kfree(transfer_buffer);
459 spin_lock_irq(&intr->lock);
461 spin_unlock_irq(&intr->lock);
468 void zd_usb_disable_int(struct zd_usb *usb)
471 struct zd_usb_interrupt *intr = &usb->intr;
474 spin_lock_irqsave(&intr->lock, flags);
477 spin_unlock_irqrestore(&intr->lock, flags);
481 spin_unlock_irqrestore(&intr->lock, flags);
484 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
488 static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
492 struct zd_mac *mac = zd_usb_to_mac(usb);
493 const struct rx_length_info *length_info;
495 if (length < sizeof(struct rx_length_info)) {
496 /* It's not a complete packet anyhow. */
497 struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
498 ieee->stats.rx_errors++;
499 ieee->stats.rx_length_errors++;
502 length_info = (struct rx_length_info *)
503 (buffer + length - sizeof(struct rx_length_info));
505 /* It might be that three frames are merged into a single URB
506 * transaction. We have to check for the length info tag.
508 * While testing we discovered that length_info might be unaligned,
509 * because if USB transactions are merged, the last packet will not
510 * be padded. Unaligned access might also happen if the length_info
511 * structure is not present.
513 if (get_unaligned(&length_info->tag) == cpu_to_le16(RX_LENGTH_INFO_TAG))
515 unsigned int l, k, n;
516 for (i = 0, l = 0;; i++) {
517 k = le16_to_cpu(get_unaligned(&length_info->length[i]));
523 zd_mac_rx_irq(mac, buffer+l, k);
529 zd_mac_rx_irq(mac, buffer, length);
533 static void rx_urb_complete(struct urb *urb)
536 struct zd_usb_rx *rx;
540 switch (urb->status) {
551 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
555 buffer = urb->transfer_buffer;
556 length = urb->actual_length;
560 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
561 /* If there is an old first fragment, we don't care. */
562 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
563 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
564 spin_lock(&rx->lock);
565 memcpy(rx->fragment, buffer, length);
566 rx->fragment_length = length;
567 spin_unlock(&rx->lock);
571 spin_lock(&rx->lock);
572 if (rx->fragment_length > 0) {
573 /* We are on a second fragment, we believe */
574 ZD_ASSERT(length + rx->fragment_length <=
575 ARRAY_SIZE(rx->fragment));
576 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
577 memcpy(rx->fragment+rx->fragment_length, buffer, length);
578 handle_rx_packet(usb, rx->fragment,
579 rx->fragment_length + length);
580 rx->fragment_length = 0;
581 spin_unlock(&rx->lock);
583 spin_unlock(&rx->lock);
584 handle_rx_packet(usb, buffer, length);
588 usb_submit_urb(urb, GFP_ATOMIC);
591 static struct urb *alloc_urb(struct zd_usb *usb)
593 struct usb_device *udev = zd_usb_to_usbdev(usb);
597 urb = usb_alloc_urb(0, GFP_NOFS);
600 buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_NOFS,
607 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
608 buffer, USB_MAX_RX_SIZE,
609 rx_urb_complete, usb);
610 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
615 static void free_urb(struct urb *urb)
619 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
620 urb->transfer_buffer, urb->transfer_dma);
624 int zd_usb_enable_rx(struct zd_usb *usb)
627 struct zd_usb_rx *rx = &usb->rx;
630 dev_dbg_f(zd_usb_dev(usb), "\n");
633 urbs = kcalloc(URBS_COUNT, sizeof(struct urb *), GFP_NOFS);
636 for (i = 0; i < URBS_COUNT; i++) {
637 urbs[i] = alloc_urb(usb);
642 ZD_ASSERT(!irqs_disabled());
643 spin_lock_irq(&rx->lock);
645 spin_unlock_irq(&rx->lock);
650 rx->urbs_count = URBS_COUNT;
651 spin_unlock_irq(&rx->lock);
653 for (i = 0; i < URBS_COUNT; i++) {
654 r = usb_submit_urb(urbs[i], GFP_NOFS);
661 for (i = 0; i < URBS_COUNT; i++) {
662 usb_kill_urb(urbs[i]);
664 spin_lock_irq(&rx->lock);
667 spin_unlock_irq(&rx->lock);
670 for (i = 0; i < URBS_COUNT; i++)
676 void zd_usb_disable_rx(struct zd_usb *usb)
682 struct zd_usb_rx *rx = &usb->rx;
684 spin_lock_irqsave(&rx->lock, flags);
686 count = rx->urbs_count;
687 spin_unlock_irqrestore(&rx->lock, flags);
691 for (i = 0; i < count; i++) {
692 usb_kill_urb(urbs[i]);
697 spin_lock_irqsave(&rx->lock, flags);
700 spin_unlock_irqrestore(&rx->lock, flags);
703 static void tx_urb_complete(struct urb *urb)
707 switch (urb->status) {
716 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
719 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
723 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
724 urb->transfer_buffer, urb->transfer_dma);
728 r = usb_submit_urb(urb, GFP_ATOMIC);
730 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
735 /* Puts the frame on the USB endpoint. It doesn't wait for
736 * completion. The frame must contain the control set.
738 int zd_usb_tx(struct zd_usb *usb, const u8 *frame, unsigned int length)
741 struct usb_device *udev = zd_usb_to_usbdev(usb);
745 urb = usb_alloc_urb(0, GFP_ATOMIC);
751 buffer = usb_buffer_alloc(zd_usb_to_usbdev(usb), length, GFP_ATOMIC,
757 memcpy(buffer, frame, length);
759 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
760 buffer, length, tx_urb_complete, NULL);
761 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
763 r = usb_submit_urb(urb, GFP_ATOMIC);
768 usb_buffer_free(zd_usb_to_usbdev(usb), length, buffer,
776 static inline void init_usb_interrupt(struct zd_usb *usb)
778 struct zd_usb_interrupt *intr = &usb->intr;
780 spin_lock_init(&intr->lock);
781 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
782 init_completion(&intr->read_regs.completion);
783 intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT);
786 static inline void init_usb_rx(struct zd_usb *usb)
788 struct zd_usb_rx *rx = &usb->rx;
789 spin_lock_init(&rx->lock);
790 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
791 rx->usb_packet_size = 512;
793 rx->usb_packet_size = 64;
795 ZD_ASSERT(rx->fragment_length == 0);
798 static inline void init_usb_tx(struct zd_usb *usb)
800 /* FIXME: at this point we will allocate a fixed number of urb's for
801 * use in a cyclic scheme */
804 void zd_usb_init(struct zd_usb *usb, struct net_device *netdev,
805 struct usb_interface *intf)
807 memset(usb, 0, sizeof(*usb));
808 usb->intf = usb_get_intf(intf);
809 usb_set_intfdata(usb->intf, netdev);
810 init_usb_interrupt(usb);
815 void zd_usb_clear(struct zd_usb *usb)
817 usb_set_intfdata(usb->intf, NULL);
818 usb_put_intf(usb->intf);
819 ZD_MEMCLEAR(usb, sizeof(*usb));
820 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
823 static const char *speed(enum usb_device_speed speed)
833 return "unknown speed";
837 static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
839 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
840 le16_to_cpu(udev->descriptor.idVendor),
841 le16_to_cpu(udev->descriptor.idProduct),
846 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
848 struct usb_device *udev = interface_to_usbdev(usb->intf);
849 return scnprint_id(udev, buffer, size);
853 static void print_id(struct usb_device *udev)
857 scnprint_id(udev, buffer, sizeof(buffer));
858 buffer[sizeof(buffer)-1] = 0;
859 dev_dbg_f(&udev->dev, "%s\n", buffer);
862 #define print_id(udev) do { } while (0)
865 static int eject_installer(struct usb_interface *intf)
867 struct usb_device *udev = interface_to_usbdev(intf);
868 struct usb_host_interface *iface_desc = &intf->altsetting[0];
869 struct usb_endpoint_descriptor *endpoint;
874 /* Find bulk out endpoint */
875 endpoint = &iface_desc->endpoint[1].desc;
876 if ((endpoint->bEndpointAddress & USB_TYPE_MASK) == USB_DIR_OUT &&
877 (endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
878 USB_ENDPOINT_XFER_BULK) {
879 bulk_out_ep = endpoint->bEndpointAddress;
882 "zd1211rw: Could not find bulk out endpoint\n");
886 cmd = kzalloc(31, GFP_KERNEL);
890 /* USB bulk command block */
891 cmd[0] = 0x55; /* bulk command signature */
892 cmd[1] = 0x53; /* bulk command signature */
893 cmd[2] = 0x42; /* bulk command signature */
894 cmd[3] = 0x43; /* bulk command signature */
895 cmd[14] = 6; /* command length */
897 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
898 cmd[19] = 0x2; /* eject disc */
900 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
901 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
902 cmd, 31, NULL, 2000);
907 /* At this point, the device disconnects and reconnects with the real
910 usb_set_intfdata(intf, NULL);
914 static int probe(struct usb_interface *intf, const struct usb_device_id *id)
917 struct usb_device *udev = interface_to_usbdev(intf);
918 struct net_device *netdev = NULL;
922 if (id->driver_info & DEVICE_INSTALLER)
923 return eject_installer(intf);
925 switch (udev->speed) {
931 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
936 usb_reset_device(interface_to_usbdev(intf));
938 netdev = zd_netdev_alloc(intf);
939 if (netdev == NULL) {
944 r = upload_firmware(udev, id->driver_info);
947 "couldn't load firmware. Error number %d\n", r);
951 r = usb_reset_configuration(udev);
953 dev_dbg_f(&intf->dev,
954 "couldn't reset configuration. Error number %d\n", r);
958 /* At this point the interrupt endpoint is not generally enabled. We
959 * save the USB bandwidth until the network device is opened. But
960 * notify that the initialization of the MAC will require the
961 * interrupts to be temporary enabled.
963 r = zd_mac_init_hw(zd_netdev_mac(netdev), id->driver_info);
965 dev_dbg_f(&intf->dev,
966 "couldn't initialize mac. Error number %d\n", r);
970 r = register_netdev(netdev);
972 dev_dbg_f(&intf->dev,
973 "couldn't register netdev. Error number %d\n", r);
977 dev_dbg_f(&intf->dev, "successful\n");
978 dev_info(&intf->dev,"%s\n", netdev->name);
981 usb_reset_device(interface_to_usbdev(intf));
982 zd_netdev_free(netdev);
986 static void disconnect(struct usb_interface *intf)
988 struct net_device *netdev = zd_intf_to_netdev(intf);
989 struct zd_mac *mac = zd_netdev_mac(netdev);
990 struct zd_usb *usb = &mac->chip.usb;
992 /* Either something really bad happened, or we're just dealing with
993 * a DEVICE_INSTALLER. */
997 dev_dbg_f(zd_usb_dev(usb), "\n");
999 zd_netdev_disconnect(netdev);
1001 /* Just in case something has gone wrong! */
1002 zd_usb_disable_rx(usb);
1003 zd_usb_disable_int(usb);
1005 /* If the disconnect has been caused by a removal of the
1006 * driver module, the reset allows reloading of the driver. If the
1007 * reset will not be executed here, the upload of the firmware in the
1008 * probe function caused by the reloading of the driver will fail.
1010 usb_reset_device(interface_to_usbdev(intf));
1012 zd_netdev_free(netdev);
1013 dev_dbg(&intf->dev, "disconnected\n");
1016 static struct usb_driver driver = {
1018 .id_table = usb_ids,
1020 .disconnect = disconnect,
1023 struct workqueue_struct *zd_workqueue;
1025 static int __init usb_init(void)
1029 pr_debug("%s usb_init()\n", driver.name);
1031 zd_workqueue = create_singlethread_workqueue(driver.name);
1032 if (zd_workqueue == NULL) {
1033 printk(KERN_ERR "%s couldn't create workqueue\n", driver.name);
1037 r = usb_register(&driver);
1039 destroy_workqueue(zd_workqueue);
1040 printk(KERN_ERR "%s usb_register() failed. Error number %d\n",
1045 pr_debug("%s initialized\n", driver.name);
1049 static void __exit usb_exit(void)
1051 pr_debug("%s usb_exit()\n", driver.name);
1052 usb_deregister(&driver);
1053 destroy_workqueue(zd_workqueue);
1056 module_init(usb_init);
1057 module_exit(usb_exit);
1059 static int usb_int_regs_length(unsigned int count)
1061 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1064 static void prepare_read_regs_int(struct zd_usb *usb)
1066 struct zd_usb_interrupt *intr = &usb->intr;
1068 spin_lock_irq(&intr->lock);
1069 intr->read_regs_enabled = 1;
1070 INIT_COMPLETION(intr->read_regs.completion);
1071 spin_unlock_irq(&intr->lock);
1074 static void disable_read_regs_int(struct zd_usb *usb)
1076 struct zd_usb_interrupt *intr = &usb->intr;
1078 spin_lock_irq(&intr->lock);
1079 intr->read_regs_enabled = 0;
1080 spin_unlock_irq(&intr->lock);
1083 static int get_results(struct zd_usb *usb, u16 *values,
1084 struct usb_req_read_regs *req, unsigned int count)
1088 struct zd_usb_interrupt *intr = &usb->intr;
1089 struct read_regs_int *rr = &intr->read_regs;
1090 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1092 spin_lock_irq(&intr->lock);
1095 /* The created block size seems to be larger than expected.
1096 * However results appear to be correct.
1098 if (rr->length < usb_int_regs_length(count)) {
1099 dev_dbg_f(zd_usb_dev(usb),
1100 "error: actual length %d less than expected %d\n",
1101 rr->length, usb_int_regs_length(count));
1104 if (rr->length > sizeof(rr->buffer)) {
1105 dev_dbg_f(zd_usb_dev(usb),
1106 "error: actual length %d exceeds buffer size %zu\n",
1107 rr->length, sizeof(rr->buffer));
1111 for (i = 0; i < count; i++) {
1112 struct reg_data *rd = ®s->regs[i];
1113 if (rd->addr != req->addr[i]) {
1114 dev_dbg_f(zd_usb_dev(usb),
1115 "rd[%d] addr %#06hx expected %#06hx\n", i,
1116 le16_to_cpu(rd->addr),
1117 le16_to_cpu(req->addr[i]));
1120 values[i] = le16_to_cpu(rd->value);
1125 spin_unlock_irq(&intr->lock);
1129 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1130 const zd_addr_t *addresses, unsigned int count)
1133 int i, req_len, actual_req_len;
1134 struct usb_device *udev;
1135 struct usb_req_read_regs *req = NULL;
1136 unsigned long timeout;
1139 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1142 if (count > USB_MAX_IOREAD16_COUNT) {
1143 dev_dbg_f(zd_usb_dev(usb),
1144 "error: count %u exceeds possible max %u\n",
1145 count, USB_MAX_IOREAD16_COUNT);
1149 dev_dbg_f(zd_usb_dev(usb),
1150 "error: io in atomic context not supported\n");
1151 return -EWOULDBLOCK;
1153 if (!usb_int_enabled(usb)) {
1154 dev_dbg_f(zd_usb_dev(usb),
1155 "error: usb interrupt not enabled\n");
1156 return -EWOULDBLOCK;
1159 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1160 req = kmalloc(req_len, GFP_NOFS);
1163 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1164 for (i = 0; i < count; i++)
1165 req->addr[i] = cpu_to_le16((u16)addresses[i]);
1167 udev = zd_usb_to_usbdev(usb);
1168 prepare_read_regs_int(usb);
1169 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1170 req, req_len, &actual_req_len, 1000 /* ms */);
1172 dev_dbg_f(zd_usb_dev(usb),
1173 "error in usb_bulk_msg(). Error number %d\n", r);
1176 if (req_len != actual_req_len) {
1177 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1178 " req_len %d != actual_req_len %d\n",
1179 req_len, actual_req_len);
1184 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1185 msecs_to_jiffies(1000));
1187 disable_read_regs_int(usb);
1188 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1193 r = get_results(usb, values, req, count);
1199 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1203 struct usb_device *udev;
1204 struct usb_req_write_regs *req = NULL;
1205 int i, req_len, actual_req_len;
1209 if (count > USB_MAX_IOWRITE16_COUNT) {
1210 dev_dbg_f(zd_usb_dev(usb),
1211 "error: count %u exceeds possible max %u\n",
1212 count, USB_MAX_IOWRITE16_COUNT);
1216 dev_dbg_f(zd_usb_dev(usb),
1217 "error: io in atomic context not supported\n");
1218 return -EWOULDBLOCK;
1221 req_len = sizeof(struct usb_req_write_regs) +
1222 count * sizeof(struct reg_data);
1223 req = kmalloc(req_len, GFP_NOFS);
1227 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1228 for (i = 0; i < count; i++) {
1229 struct reg_data *rw = &req->reg_writes[i];
1230 rw->addr = cpu_to_le16((u16)ioreqs[i].addr);
1231 rw->value = cpu_to_le16(ioreqs[i].value);
1234 udev = zd_usb_to_usbdev(usb);
1235 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1236 req, req_len, &actual_req_len, 1000 /* ms */);
1238 dev_dbg_f(zd_usb_dev(usb),
1239 "error in usb_bulk_msg(). Error number %d\n", r);
1242 if (req_len != actual_req_len) {
1243 dev_dbg_f(zd_usb_dev(usb),
1244 "error in usb_bulk_msg()"
1245 " req_len %d != actual_req_len %d\n",
1246 req_len, actual_req_len);
1251 /* FALL-THROUGH with r == 0 */
1257 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1260 struct usb_device *udev;
1261 struct usb_req_rfwrite *req = NULL;
1262 int i, req_len, actual_req_len;
1263 u16 bit_value_template;
1266 dev_dbg_f(zd_usb_dev(usb),
1267 "error: io in atomic context not supported\n");
1268 return -EWOULDBLOCK;
1270 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1271 dev_dbg_f(zd_usb_dev(usb),
1272 "error: bits %d are smaller than"
1273 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1274 bits, USB_MIN_RFWRITE_BIT_COUNT);
1277 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1278 dev_dbg_f(zd_usb_dev(usb),
1279 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1280 bits, USB_MAX_RFWRITE_BIT_COUNT);
1284 if (value & (~0UL << bits)) {
1285 dev_dbg_f(zd_usb_dev(usb),
1286 "error: value %#09x has bits >= %d set\n",
1292 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1294 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1296 dev_dbg_f(zd_usb_dev(usb),
1297 "error %d: Couldn't read CR203\n", r);
1300 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1302 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1303 req = kmalloc(req_len, GFP_NOFS);
1307 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1308 /* 1: 3683a, but not used in ZYDAS driver */
1309 req->value = cpu_to_le16(2);
1310 req->bits = cpu_to_le16(bits);
1312 for (i = 0; i < bits; i++) {
1313 u16 bv = bit_value_template;
1314 if (value & (1 << (bits-1-i)))
1316 req->bit_values[i] = cpu_to_le16(bv);
1319 udev = zd_usb_to_usbdev(usb);
1320 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1321 req, req_len, &actual_req_len, 1000 /* ms */);
1323 dev_dbg_f(zd_usb_dev(usb),
1324 "error in usb_bulk_msg(). Error number %d\n", r);
1327 if (req_len != actual_req_len) {
1328 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1329 " req_len %d != actual_req_len %d\n",
1330 req_len, actual_req_len);
1335 /* FALL-THROUGH with r == 0 */