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 <net/ieee80211.h>
30 #include "zd_netdev.h"
35 static struct usb_device_id usb_ids[] = {
37 { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 },
38 { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 },
39 { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 },
40 { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 },
41 { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 },
42 { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 },
43 { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 },
44 { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 },
45 { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 },
46 { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 },
48 { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
49 { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
50 { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
54 MODULE_LICENSE("GPL");
55 MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
56 MODULE_AUTHOR("Ulrich Kunitz");
57 MODULE_AUTHOR("Daniel Drake");
58 MODULE_VERSION("1.0");
59 MODULE_DEVICE_TABLE(usb, usb_ids);
61 #define FW_ZD1211_PREFIX "zd1211/zd1211_"
62 #define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
64 /* register address handling */
67 static int check_addr(struct zd_usb *usb, zd_addr_t addr)
69 u32 base = ZD_ADDR_BASE(addr);
70 u32 offset = ZD_OFFSET(addr);
72 if ((u32)addr & ADDR_ZERO_MASK)
78 if (offset > CR_MAX_OFFSET) {
79 dev_dbg(zd_usb_dev(usb),
80 "CR offset %#010x larger than"
81 " CR_MAX_OFFSET %#10x\n",
82 offset, CR_MAX_OFFSET);
86 dev_dbg(zd_usb_dev(usb),
87 "CR offset %#010x is not a multiple of 2\n",
93 if (offset > E2P_MAX_OFFSET) {
94 dev_dbg(zd_usb_dev(usb),
95 "E2P offset %#010x larger than"
96 " E2P_MAX_OFFSET %#010x\n",
97 offset, E2P_MAX_OFFSET);
102 if (!usb->fw_base_offset) {
103 dev_dbg(zd_usb_dev(usb),
104 "ERROR: fw base offset has not been set\n");
107 if (offset > FW_MAX_OFFSET) {
108 dev_dbg(zd_usb_dev(usb),
109 "FW offset %#10x is larger than"
110 " FW_MAX_OFFSET %#010x\n",
111 offset, FW_MAX_OFFSET);
112 goto invalid_address;
116 dev_dbg(zd_usb_dev(usb),
117 "address has unsupported base %#010x\n", addr);
118 goto invalid_address;
123 dev_dbg(zd_usb_dev(usb),
124 "ERROR: invalid address: %#010x\n", addr);
129 static u16 usb_addr(struct zd_usb *usb, zd_addr_t addr)
134 base = ZD_ADDR_BASE(addr);
135 offset = ZD_OFFSET(addr);
137 ZD_ASSERT(check_addr(usb, addr) == 0);
141 offset += CR_BASE_OFFSET;
144 offset += E2P_BASE_OFFSET;
147 offset += usb->fw_base_offset;
154 /* USB device initialization */
156 static int request_fw_file(
157 const struct firmware **fw, const char *name, struct device *device)
161 dev_dbg_f(device, "fw name %s\n", name);
163 r = request_firmware(fw, name, device);
166 "Could not load firmware file %s. Error number %d\n",
171 static inline u16 get_bcdDevice(const struct usb_device *udev)
173 return le16_to_cpu(udev->descriptor.bcdDevice);
176 enum upload_code_flags {
180 /* Ensures that MAX_TRANSFER_SIZE is even. */
181 #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
183 static int upload_code(struct usb_device *udev,
184 const u8 *data, size_t size, u16 code_offset, int flags)
189 /* USB request blocks need "kmalloced" buffers.
191 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
193 dev_err(&udev->dev, "out of memory\n");
200 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
201 size : MAX_TRANSFER_SIZE;
203 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
205 memcpy(p, data, transfer_size);
206 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
207 USB_REQ_FIRMWARE_DOWNLOAD,
208 USB_DIR_OUT | USB_TYPE_VENDOR,
209 code_offset, 0, p, transfer_size, 1000 /* ms */);
212 "USB control request for firmware upload"
213 " failed. Error number %d\n", r);
216 transfer_size = r & ~1;
218 size -= transfer_size;
219 data += transfer_size;
220 code_offset += transfer_size/sizeof(u16);
223 if (flags & REBOOT) {
226 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
227 USB_REQ_FIRMWARE_CONFIRM,
228 USB_DIR_IN | USB_TYPE_VENDOR,
229 0, 0, &ret, sizeof(ret), 5000 /* ms */);
230 if (r != sizeof(ret)) {
232 "control request firmeware confirmation failed."
233 " Return value %d\n", r);
240 "Internal error while downloading."
241 " Firmware confirm return value %#04x\n",
246 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
256 static u16 get_word(const void *data, u16 offset)
258 const __le16 *p = data;
259 return le16_to_cpu(p[offset]);
262 static char *get_fw_name(char *buffer, size_t size, u8 device_type,
265 scnprintf(buffer, size, "%s%s",
266 device_type == DEVICE_ZD1211B ?
267 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
272 static int handle_version_mismatch(struct usb_device *udev, u8 device_type,
273 const struct firmware *ub_fw)
275 const struct firmware *ur_fw = NULL;
280 r = request_fw_file(&ur_fw,
281 get_fw_name(fw_name, sizeof(fw_name), device_type, "ur"),
286 r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START_OFFSET,
291 offset = ((EEPROM_REGS_OFFSET + EEPROM_REGS_SIZE) * sizeof(u16));
292 r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
293 E2P_BASE_OFFSET + EEPROM_REGS_SIZE, REBOOT);
295 /* At this point, the vendor driver downloads the whole firmware
296 * image, hacks around with version IDs, and uploads it again,
297 * completely overwriting the boot code. We do not do this here as
298 * it is not required on any tested devices, and it is suspected to
301 release_firmware(ur_fw);
305 static int upload_firmware(struct usb_device *udev, u8 device_type)
310 const struct firmware *ub_fw = NULL;
311 const struct firmware *uph_fw = NULL;
314 bcdDevice = get_bcdDevice(udev);
316 r = request_fw_file(&ub_fw,
317 get_fw_name(fw_name, sizeof(fw_name), device_type, "ub"),
322 fw_bcdDevice = get_word(ub_fw->data, EEPROM_REGS_OFFSET);
324 if (fw_bcdDevice != bcdDevice) {
326 "firmware version %#06x and device bootcode version "
327 "%#06x differ\n", fw_bcdDevice, bcdDevice);
328 if (bcdDevice <= 0x4313)
329 dev_warn(&udev->dev, "device has old bootcode, please "
330 "report success or failure\n");
332 r = handle_version_mismatch(udev, device_type, ub_fw);
336 dev_dbg_f(&udev->dev,
337 "firmware device id %#06x is equal to the "
338 "actual device id\n", fw_bcdDevice);
342 r = request_fw_file(&uph_fw,
343 get_fw_name(fw_name, sizeof(fw_name), device_type, "uphr"),
348 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START_OFFSET,
352 "Could not upload firmware code uph. Error number %d\n",
358 release_firmware(ub_fw);
359 release_firmware(uph_fw);
363 static void disable_read_regs_int(struct zd_usb *usb)
365 struct zd_usb_interrupt *intr = &usb->intr;
367 spin_lock(&intr->lock);
368 intr->read_regs_enabled = 0;
369 spin_unlock(&intr->lock);
372 #define urb_dev(urb) (&(urb)->dev->dev)
374 static inline void handle_regs_int(struct urb *urb)
376 struct zd_usb *usb = urb->context;
377 struct zd_usb_interrupt *intr = &usb->intr;
380 ZD_ASSERT(in_interrupt());
381 spin_lock(&intr->lock);
383 if (intr->read_regs_enabled) {
384 intr->read_regs.length = len = urb->actual_length;
386 if (len > sizeof(intr->read_regs.buffer))
387 len = sizeof(intr->read_regs.buffer);
388 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
389 intr->read_regs_enabled = 0;
390 complete(&intr->read_regs.completion);
394 dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n");
396 spin_unlock(&intr->lock);
399 static inline void handle_retry_failed_int(struct urb *urb)
401 dev_dbg_f(urb_dev(urb), "retry failed interrupt\n");
405 static void int_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
408 struct usb_int_header *hdr;
410 switch (urb->status) {
424 if (urb->actual_length < sizeof(hdr)) {
425 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
429 hdr = urb->transfer_buffer;
430 if (hdr->type != USB_INT_TYPE) {
431 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
436 case USB_INT_ID_REGS:
437 handle_regs_int(urb);
439 case USB_INT_ID_RETRY_FAILED:
440 handle_retry_failed_int(urb);
443 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
444 (unsigned int)hdr->id);
449 r = usb_submit_urb(urb, GFP_ATOMIC);
451 dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
456 kfree(urb->transfer_buffer);
459 static inline int int_urb_interval(struct usb_device *udev)
461 switch (udev->speed) {
472 static inline int usb_int_enabled(struct zd_usb *usb)
475 struct zd_usb_interrupt *intr = &usb->intr;
478 spin_lock_irqsave(&intr->lock, flags);
480 spin_unlock_irqrestore(&intr->lock, flags);
484 int zd_usb_enable_int(struct zd_usb *usb)
487 struct usb_device *udev;
488 struct zd_usb_interrupt *intr = &usb->intr;
489 void *transfer_buffer = NULL;
492 dev_dbg_f(zd_usb_dev(usb), "\n");
494 urb = usb_alloc_urb(0, GFP_NOFS);
500 ZD_ASSERT(!irqs_disabled());
501 spin_lock_irq(&intr->lock);
503 spin_unlock_irq(&intr->lock);
508 spin_unlock_irq(&intr->lock);
510 /* TODO: make it a DMA buffer */
512 transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_NOFS);
513 if (!transfer_buffer) {
514 dev_dbg_f(zd_usb_dev(usb),
515 "couldn't allocate transfer_buffer\n");
516 goto error_set_urb_null;
519 udev = zd_usb_to_usbdev(usb);
520 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
521 transfer_buffer, USB_MAX_EP_INT_BUFFER,
522 int_urb_complete, usb,
525 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
526 r = usb_submit_urb(urb, GFP_NOFS);
528 dev_dbg_f(zd_usb_dev(usb),
529 "Couldn't submit urb. Error number %d\n", r);
535 kfree(transfer_buffer);
537 spin_lock_irq(&intr->lock);
539 spin_unlock_irq(&intr->lock);
546 void zd_usb_disable_int(struct zd_usb *usb)
549 struct zd_usb_interrupt *intr = &usb->intr;
552 spin_lock_irqsave(&intr->lock, flags);
555 spin_unlock_irqrestore(&intr->lock, flags);
559 spin_unlock_irqrestore(&intr->lock, flags);
562 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
566 static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
570 struct zd_mac *mac = zd_usb_to_mac(usb);
571 const struct rx_length_info *length_info;
573 if (length < sizeof(struct rx_length_info)) {
574 /* It's not a complete packet anyhow. */
577 length_info = (struct rx_length_info *)
578 (buffer + length - sizeof(struct rx_length_info));
580 /* It might be that three frames are merged into a single URB
581 * transaction. We have to check for the length info tag.
583 * While testing we discovered that length_info might be unaligned,
584 * because if USB transactions are merged, the last packet will not
585 * be padded. Unaligned access might also happen if the length_info
586 * structure is not present.
588 if (get_unaligned(&length_info->tag) == cpu_to_le16(RX_LENGTH_INFO_TAG))
590 unsigned int l, k, n;
591 for (i = 0, l = 0;; i++) {
592 k = le16_to_cpu(get_unaligned(&length_info->length[i]));
596 zd_mac_rx(mac, buffer+l, k);
602 zd_mac_rx(mac, buffer, length);
606 static void rx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
609 struct zd_usb_rx *rx;
613 switch (urb->status) {
624 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
628 buffer = urb->transfer_buffer;
629 length = urb->actual_length;
633 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
634 /* If there is an old first fragment, we don't care. */
635 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
636 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
637 spin_lock(&rx->lock);
638 memcpy(rx->fragment, buffer, length);
639 rx->fragment_length = length;
640 spin_unlock(&rx->lock);
644 spin_lock(&rx->lock);
645 if (rx->fragment_length > 0) {
646 /* We are on a second fragment, we believe */
647 ZD_ASSERT(length + rx->fragment_length <=
648 ARRAY_SIZE(rx->fragment));
649 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
650 memcpy(rx->fragment+rx->fragment_length, buffer, length);
651 handle_rx_packet(usb, rx->fragment,
652 rx->fragment_length + length);
653 rx->fragment_length = 0;
654 spin_unlock(&rx->lock);
656 spin_unlock(&rx->lock);
657 handle_rx_packet(usb, buffer, length);
661 usb_submit_urb(urb, GFP_ATOMIC);
664 struct urb *alloc_urb(struct zd_usb *usb)
666 struct usb_device *udev = zd_usb_to_usbdev(usb);
670 urb = usb_alloc_urb(0, GFP_NOFS);
673 buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_NOFS,
680 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
681 buffer, USB_MAX_RX_SIZE,
682 rx_urb_complete, usb);
683 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
688 void free_urb(struct urb *urb)
692 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
693 urb->transfer_buffer, urb->transfer_dma);
697 int zd_usb_enable_rx(struct zd_usb *usb)
700 struct zd_usb_rx *rx = &usb->rx;
703 dev_dbg_f(zd_usb_dev(usb), "\n");
706 urbs = kcalloc(URBS_COUNT, sizeof(struct urb *), GFP_NOFS);
709 for (i = 0; i < URBS_COUNT; i++) {
710 urbs[i] = alloc_urb(usb);
715 ZD_ASSERT(!irqs_disabled());
716 spin_lock_irq(&rx->lock);
718 spin_unlock_irq(&rx->lock);
723 rx->urbs_count = URBS_COUNT;
724 spin_unlock_irq(&rx->lock);
726 for (i = 0; i < URBS_COUNT; i++) {
727 r = usb_submit_urb(urbs[i], GFP_NOFS);
734 for (i = 0; i < URBS_COUNT; i++) {
735 usb_kill_urb(urbs[i]);
737 spin_lock_irq(&rx->lock);
740 spin_unlock_irq(&rx->lock);
743 for (i = 0; i < URBS_COUNT; i++)
749 void zd_usb_disable_rx(struct zd_usb *usb)
755 struct zd_usb_rx *rx = &usb->rx;
757 spin_lock_irqsave(&rx->lock, flags);
759 count = rx->urbs_count;
760 spin_unlock_irqrestore(&rx->lock, flags);
764 for (i = 0; i < count; i++) {
765 usb_kill_urb(urbs[i]);
770 spin_lock_irqsave(&rx->lock, flags);
773 spin_unlock_irqrestore(&rx->lock, flags);
776 static void tx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
780 switch (urb->status) {
789 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
792 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
796 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
797 urb->transfer_buffer, urb->transfer_dma);
801 r = usb_submit_urb(urb, GFP_ATOMIC);
803 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
808 /* Puts the frame on the USB endpoint. It doesn't wait for
809 * completion. The frame must contain the control set.
811 int zd_usb_tx(struct zd_usb *usb, const u8 *frame, unsigned int length)
814 struct usb_device *udev = zd_usb_to_usbdev(usb);
818 urb = usb_alloc_urb(0, GFP_ATOMIC);
824 buffer = usb_buffer_alloc(zd_usb_to_usbdev(usb), length, GFP_ATOMIC,
830 memcpy(buffer, frame, length);
832 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
833 buffer, length, tx_urb_complete, NULL);
834 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
836 r = usb_submit_urb(urb, GFP_ATOMIC);
841 usb_buffer_free(zd_usb_to_usbdev(usb), length, buffer,
849 static inline void init_usb_interrupt(struct zd_usb *usb)
851 struct zd_usb_interrupt *intr = &usb->intr;
853 spin_lock_init(&intr->lock);
854 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
855 init_completion(&intr->read_regs.completion);
856 intr->read_regs.cr_int_addr = cpu_to_le16(usb_addr(usb, CR_INTERRUPT));
859 static inline void init_usb_rx(struct zd_usb *usb)
861 struct zd_usb_rx *rx = &usb->rx;
862 spin_lock_init(&rx->lock);
863 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
864 rx->usb_packet_size = 512;
866 rx->usb_packet_size = 64;
868 ZD_ASSERT(rx->fragment_length == 0);
871 static inline void init_usb_tx(struct zd_usb *usb)
873 /* FIXME: at this point we will allocate a fixed number of urb's for
874 * use in a cyclic scheme */
877 void zd_usb_init(struct zd_usb *usb, struct net_device *netdev,
878 struct usb_interface *intf)
880 memset(usb, 0, sizeof(*usb));
881 usb->intf = usb_get_intf(intf);
882 usb_set_intfdata(usb->intf, netdev);
883 init_usb_interrupt(usb);
888 int zd_usb_init_hw(struct zd_usb *usb)
891 struct zd_chip *chip = zd_usb_to_chip(usb);
893 ZD_ASSERT(mutex_is_locked(&chip->mutex));
894 r = zd_ioread16_locked(chip, &usb->fw_base_offset,
895 USB_REG((u16)FW_BASE_ADDR_OFFSET));
898 dev_dbg_f(zd_usb_dev(usb), "fw_base_offset: %#06hx\n",
899 usb->fw_base_offset);
904 void zd_usb_clear(struct zd_usb *usb)
906 usb_set_intfdata(usb->intf, NULL);
907 usb_put_intf(usb->intf);
908 memset(usb, 0, sizeof(*usb));
909 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
912 static const char *speed(enum usb_device_speed speed)
922 return "unknown speed";
926 static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
928 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
929 le16_to_cpu(udev->descriptor.idVendor),
930 le16_to_cpu(udev->descriptor.idProduct),
935 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
937 struct usb_device *udev = interface_to_usbdev(usb->intf);
938 return scnprint_id(udev, buffer, size);
942 static void print_id(struct usb_device *udev)
946 scnprint_id(udev, buffer, sizeof(buffer));
947 buffer[sizeof(buffer)-1] = 0;
948 dev_dbg_f(&udev->dev, "%s\n", buffer);
951 #define print_id(udev) do { } while (0)
954 static int probe(struct usb_interface *intf, const struct usb_device_id *id)
957 struct usb_device *udev = interface_to_usbdev(intf);
958 struct net_device *netdev = NULL;
962 switch (udev->speed) {
968 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
973 netdev = zd_netdev_alloc(intf);
974 if (netdev == NULL) {
979 r = upload_firmware(udev, id->driver_info);
982 "couldn't load firmware. Error number %d\n", r);
986 r = usb_reset_configuration(udev);
988 dev_dbg_f(&intf->dev,
989 "couldn't reset configuration. Error number %d\n", r);
993 /* At this point the interrupt endpoint is not generally enabled. We
994 * save the USB bandwidth until the network device is opened. But
995 * notify that the initialization of the MAC will require the
996 * interrupts to be temporary enabled.
998 r = zd_mac_init_hw(zd_netdev_mac(netdev), id->driver_info);
1000 dev_dbg_f(&intf->dev,
1001 "couldn't initialize mac. Error number %d\n", r);
1005 r = register_netdev(netdev);
1007 dev_dbg_f(&intf->dev,
1008 "couldn't register netdev. Error number %d\n", r);
1012 dev_dbg_f(&intf->dev, "successful\n");
1013 dev_info(&intf->dev,"%s\n", netdev->name);
1016 usb_reset_device(interface_to_usbdev(intf));
1017 zd_netdev_free(netdev);
1021 static void disconnect(struct usb_interface *intf)
1023 struct net_device *netdev = zd_intf_to_netdev(intf);
1024 struct zd_mac *mac = zd_netdev_mac(netdev);
1025 struct zd_usb *usb = &mac->chip.usb;
1027 dev_dbg_f(zd_usb_dev(usb), "\n");
1029 zd_netdev_disconnect(netdev);
1031 /* Just in case something has gone wrong! */
1032 zd_usb_disable_rx(usb);
1033 zd_usb_disable_int(usb);
1035 /* If the disconnect has been caused by a removal of the
1036 * driver module, the reset allows reloading of the driver. If the
1037 * reset will not be executed here, the upload of the firmware in the
1038 * probe function caused by the reloading of the driver will fail.
1040 usb_reset_device(interface_to_usbdev(intf));
1042 /* If somebody still waits on this lock now, this is an error. */
1043 zd_netdev_free(netdev);
1044 dev_dbg(&intf->dev, "disconnected\n");
1047 static struct usb_driver driver = {
1049 .id_table = usb_ids,
1051 .disconnect = disconnect,
1054 static int __init usb_init(void)
1058 pr_debug("usb_init()\n");
1060 r = usb_register(&driver);
1062 printk(KERN_ERR "usb_register() failed. Error number %d\n", r);
1066 pr_debug("zd1211rw initialized\n");
1070 static void __exit usb_exit(void)
1072 pr_debug("usb_exit()\n");
1073 usb_deregister(&driver);
1076 module_init(usb_init);
1077 module_exit(usb_exit);
1079 static int usb_int_regs_length(unsigned int count)
1081 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1084 static void prepare_read_regs_int(struct zd_usb *usb)
1086 struct zd_usb_interrupt *intr = &usb->intr;
1088 spin_lock(&intr->lock);
1089 intr->read_regs_enabled = 1;
1090 INIT_COMPLETION(intr->read_regs.completion);
1091 spin_unlock(&intr->lock);
1094 static int get_results(struct zd_usb *usb, u16 *values,
1095 struct usb_req_read_regs *req, unsigned int count)
1099 struct zd_usb_interrupt *intr = &usb->intr;
1100 struct read_regs_int *rr = &intr->read_regs;
1101 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1103 spin_lock(&intr->lock);
1106 /* The created block size seems to be larger than expected.
1107 * However results appear to be correct.
1109 if (rr->length < usb_int_regs_length(count)) {
1110 dev_dbg_f(zd_usb_dev(usb),
1111 "error: actual length %d less than expected %d\n",
1112 rr->length, usb_int_regs_length(count));
1115 if (rr->length > sizeof(rr->buffer)) {
1116 dev_dbg_f(zd_usb_dev(usb),
1117 "error: actual length %d exceeds buffer size %zu\n",
1118 rr->length, sizeof(rr->buffer));
1122 for (i = 0; i < count; i++) {
1123 struct reg_data *rd = ®s->regs[i];
1124 if (rd->addr != req->addr[i]) {
1125 dev_dbg_f(zd_usb_dev(usb),
1126 "rd[%d] addr %#06hx expected %#06hx\n", i,
1127 le16_to_cpu(rd->addr),
1128 le16_to_cpu(req->addr[i]));
1131 values[i] = le16_to_cpu(rd->value);
1136 spin_unlock(&intr->lock);
1140 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1141 const zd_addr_t *addresses, unsigned int count)
1144 int i, req_len, actual_req_len;
1145 struct usb_device *udev;
1146 struct usb_req_read_regs *req = NULL;
1147 unsigned long timeout;
1150 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1153 if (count > USB_MAX_IOREAD16_COUNT) {
1154 dev_dbg_f(zd_usb_dev(usb),
1155 "error: count %u exceeds possible max %u\n",
1156 count, USB_MAX_IOREAD16_COUNT);
1160 dev_dbg_f(zd_usb_dev(usb),
1161 "error: io in atomic context not supported\n");
1162 return -EWOULDBLOCK;
1164 if (!usb_int_enabled(usb)) {
1165 dev_dbg_f(zd_usb_dev(usb),
1166 "error: usb interrupt not enabled\n");
1167 return -EWOULDBLOCK;
1170 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1171 req = kmalloc(req_len, GFP_NOFS);
1174 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1175 for (i = 0; i < count; i++)
1176 req->addr[i] = cpu_to_le16(usb_addr(usb, addresses[i]));
1178 udev = zd_usb_to_usbdev(usb);
1179 prepare_read_regs_int(usb);
1180 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1181 req, req_len, &actual_req_len, 1000 /* ms */);
1183 dev_dbg_f(zd_usb_dev(usb),
1184 "error in usb_bulk_msg(). Error number %d\n", r);
1187 if (req_len != actual_req_len) {
1188 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1189 " req_len %d != actual_req_len %d\n",
1190 req_len, actual_req_len);
1195 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1196 msecs_to_jiffies(1000));
1198 disable_read_regs_int(usb);
1199 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1204 r = get_results(usb, values, req, count);
1210 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1214 struct usb_device *udev;
1215 struct usb_req_write_regs *req = NULL;
1216 int i, req_len, actual_req_len;
1220 if (count > USB_MAX_IOWRITE16_COUNT) {
1221 dev_dbg_f(zd_usb_dev(usb),
1222 "error: count %u exceeds possible max %u\n",
1223 count, USB_MAX_IOWRITE16_COUNT);
1227 dev_dbg_f(zd_usb_dev(usb),
1228 "error: io in atomic context not supported\n");
1229 return -EWOULDBLOCK;
1232 req_len = sizeof(struct usb_req_write_regs) +
1233 count * sizeof(struct reg_data);
1234 req = kmalloc(req_len, GFP_NOFS);
1238 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1239 for (i = 0; i < count; i++) {
1240 struct reg_data *rw = &req->reg_writes[i];
1241 rw->addr = cpu_to_le16(usb_addr(usb, ioreqs[i].addr));
1242 rw->value = cpu_to_le16(ioreqs[i].value);
1245 udev = zd_usb_to_usbdev(usb);
1246 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1247 req, req_len, &actual_req_len, 1000 /* ms */);
1249 dev_dbg_f(zd_usb_dev(usb),
1250 "error in usb_bulk_msg(). Error number %d\n", r);
1253 if (req_len != actual_req_len) {
1254 dev_dbg_f(zd_usb_dev(usb),
1255 "error in usb_bulk_msg()"
1256 " req_len %d != actual_req_len %d\n",
1257 req_len, actual_req_len);
1262 /* FALL-THROUGH with r == 0 */
1268 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1271 struct usb_device *udev;
1272 struct usb_req_rfwrite *req = NULL;
1273 int i, req_len, actual_req_len;
1274 u16 bit_value_template;
1277 dev_dbg_f(zd_usb_dev(usb),
1278 "error: io in atomic context not supported\n");
1279 return -EWOULDBLOCK;
1281 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1282 dev_dbg_f(zd_usb_dev(usb),
1283 "error: bits %d are smaller than"
1284 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1285 bits, USB_MIN_RFWRITE_BIT_COUNT);
1288 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1289 dev_dbg_f(zd_usb_dev(usb),
1290 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1291 bits, USB_MAX_RFWRITE_BIT_COUNT);
1295 if (value & (~0UL << bits)) {
1296 dev_dbg_f(zd_usb_dev(usb),
1297 "error: value %#09x has bits >= %d set\n",
1303 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1305 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1307 dev_dbg_f(zd_usb_dev(usb),
1308 "error %d: Couldn't read CR203\n", r);
1311 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1313 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1314 req = kmalloc(req_len, GFP_NOFS);
1318 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1319 /* 1: 3683a, but not used in ZYDAS driver */
1320 req->value = cpu_to_le16(2);
1321 req->bits = cpu_to_le16(bits);
1323 for (i = 0; i < bits; i++) {
1324 u16 bv = bit_value_template;
1325 if (value & (1 << (bits-1-i)))
1327 req->bit_values[i] = cpu_to_le16(bv);
1330 udev = zd_usb_to_usbdev(usb);
1331 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1332 req, req_len, &actual_req_len, 1000 /* ms */);
1334 dev_dbg_f(zd_usb_dev(usb),
1335 "error in usb_bulk_msg(). Error number %d\n", r);
1338 if (req_len != actual_req_len) {
1339 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1340 " req_len %d != actual_req_len %d\n",
1341 req_len, actual_req_len);
1346 /* FALL-THROUGH with r == 0 */