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/init.h>
20 #include <linux/module.h>
21 #include <linux/firmware.h>
22 #include <linux/device.h>
23 #include <linux/errno.h>
24 #include <linux/skbuff.h>
25 #include <linux/usb.h>
26 #include <net/ieee80211.h>
29 #include "zd_netdev.h"
34 static struct usb_device_id usb_ids[] = {
36 { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 },
37 { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 },
38 { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 },
39 { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 },
40 { USB_DEVICE(0x0df6, 0x9071), .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 },
46 { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
47 { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
48 { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
52 MODULE_LICENSE("GPL");
53 MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
54 MODULE_AUTHOR("Ulrich Kunitz");
55 MODULE_AUTHOR("Daniel Drake");
56 MODULE_VERSION("1.0");
57 MODULE_DEVICE_TABLE(usb, usb_ids);
59 #define FW_ZD1211_PREFIX "zd1211/zd1211_"
60 #define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
62 /* register address handling */
65 static int check_addr(struct zd_usb *usb, zd_addr_t addr)
67 u32 base = ZD_ADDR_BASE(addr);
68 u32 offset = ZD_OFFSET(addr);
70 if ((u32)addr & ADDR_ZERO_MASK)
76 if (offset > CR_MAX_OFFSET) {
77 dev_dbg(zd_usb_dev(usb),
78 "CR offset %#010x larger than"
79 " CR_MAX_OFFSET %#10x\n",
80 offset, CR_MAX_OFFSET);
84 dev_dbg(zd_usb_dev(usb),
85 "CR offset %#010x is not a multiple of 2\n",
91 if (offset > E2P_MAX_OFFSET) {
92 dev_dbg(zd_usb_dev(usb),
93 "E2P offset %#010x larger than"
94 " E2P_MAX_OFFSET %#010x\n",
95 offset, E2P_MAX_OFFSET);
100 if (!usb->fw_base_offset) {
101 dev_dbg(zd_usb_dev(usb),
102 "ERROR: fw base offset has not been set\n");
105 if (offset > FW_MAX_OFFSET) {
106 dev_dbg(zd_usb_dev(usb),
107 "FW offset %#10x is larger than"
108 " FW_MAX_OFFSET %#010x\n",
109 offset, FW_MAX_OFFSET);
110 goto invalid_address;
114 dev_dbg(zd_usb_dev(usb),
115 "address has unsupported base %#010x\n", addr);
116 goto invalid_address;
121 dev_dbg(zd_usb_dev(usb),
122 "ERROR: invalid address: %#010x\n", addr);
127 static u16 usb_addr(struct zd_usb *usb, zd_addr_t addr)
132 base = ZD_ADDR_BASE(addr);
133 offset = ZD_OFFSET(addr);
135 ZD_ASSERT(check_addr(usb, addr) == 0);
139 offset += CR_BASE_OFFSET;
142 offset += E2P_BASE_OFFSET;
145 offset += usb->fw_base_offset;
152 /* USB device initialization */
154 static int request_fw_file(
155 const struct firmware **fw, const char *name, struct device *device)
159 dev_dbg_f(device, "fw name %s\n", name);
161 r = request_firmware(fw, name, device);
164 "Could not load firmware file %s. Error number %d\n",
169 static inline u16 get_bcdDevice(const struct usb_device *udev)
171 return le16_to_cpu(udev->descriptor.bcdDevice);
174 enum upload_code_flags {
178 /* Ensures that MAX_TRANSFER_SIZE is even. */
179 #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
181 static int upload_code(struct usb_device *udev,
182 const u8 *data, size_t size, u16 code_offset, int flags)
187 /* USB request blocks need "kmalloced" buffers.
189 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
191 dev_err(&udev->dev, "out of memory\n");
198 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
199 size : MAX_TRANSFER_SIZE;
201 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
203 memcpy(p, data, transfer_size);
204 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
205 USB_REQ_FIRMWARE_DOWNLOAD,
206 USB_DIR_OUT | USB_TYPE_VENDOR,
207 code_offset, 0, p, transfer_size, 1000 /* ms */);
210 "USB control request for firmware upload"
211 " failed. Error number %d\n", r);
214 transfer_size = r & ~1;
216 size -= transfer_size;
217 data += transfer_size;
218 code_offset += transfer_size/sizeof(u16);
221 if (flags & REBOOT) {
224 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
225 USB_REQ_FIRMWARE_CONFIRM,
226 USB_DIR_IN | USB_TYPE_VENDOR,
227 0, 0, &ret, sizeof(ret), 5000 /* ms */);
228 if (r != sizeof(ret)) {
230 "control request firmeware confirmation failed."
231 " Return value %d\n", r);
238 "Internal error while downloading."
239 " Firmware confirm return value %#04x\n",
244 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
254 static u16 get_word(const void *data, u16 offset)
256 const __le16 *p = data;
257 return le16_to_cpu(p[offset]);
260 static char *get_fw_name(char *buffer, size_t size, u8 device_type,
263 scnprintf(buffer, size, "%s%s",
264 device_type == DEVICE_ZD1211B ?
265 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
270 static int upload_firmware(struct usb_device *udev, u8 device_type)
275 const struct firmware *ub_fw = NULL;
276 const struct firmware *uph_fw = NULL;
279 bcdDevice = get_bcdDevice(udev);
281 r = request_fw_file(&ub_fw,
282 get_fw_name(fw_name, sizeof(fw_name), device_type, "ub"),
287 fw_bcdDevice = get_word(ub_fw->data, EEPROM_REGS_OFFSET);
289 /* FIXME: do we have any reason to perform the kludge that the vendor
290 * driver does when there is a version mismatch? (their driver uploads
291 * different firmwares and stuff)
293 if (fw_bcdDevice != bcdDevice) {
295 "firmware device id %#06x and actual device id "
296 "%#06x differ, continuing anyway\n",
297 fw_bcdDevice, bcdDevice);
299 dev_dbg_f(&udev->dev,
300 "firmware device id %#06x is equal to the "
301 "actual device id\n", fw_bcdDevice);
305 r = request_fw_file(&uph_fw,
306 get_fw_name(fw_name, sizeof(fw_name), device_type, "uphr"),
311 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START_OFFSET,
315 "Could not upload firmware code uph. Error number %d\n",
321 release_firmware(ub_fw);
322 release_firmware(uph_fw);
326 static void disable_read_regs_int(struct zd_usb *usb)
328 struct zd_usb_interrupt *intr = &usb->intr;
330 spin_lock(&intr->lock);
331 intr->read_regs_enabled = 0;
332 spin_unlock(&intr->lock);
335 #define urb_dev(urb) (&(urb)->dev->dev)
337 static inline void handle_regs_int(struct urb *urb)
339 struct zd_usb *usb = urb->context;
340 struct zd_usb_interrupt *intr = &usb->intr;
343 ZD_ASSERT(in_interrupt());
344 spin_lock(&intr->lock);
346 if (intr->read_regs_enabled) {
347 intr->read_regs.length = len = urb->actual_length;
349 if (len > sizeof(intr->read_regs.buffer))
350 len = sizeof(intr->read_regs.buffer);
351 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
352 intr->read_regs_enabled = 0;
353 complete(&intr->read_regs.completion);
357 dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n");
359 spin_unlock(&intr->lock);
362 static inline void handle_retry_failed_int(struct urb *urb)
364 dev_dbg_f(urb_dev(urb), "retry failed interrupt\n");
368 static void int_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
371 struct usb_int_header *hdr;
373 switch (urb->status) {
387 if (urb->actual_length < sizeof(hdr)) {
388 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
392 hdr = urb->transfer_buffer;
393 if (hdr->type != USB_INT_TYPE) {
394 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
399 case USB_INT_ID_REGS:
400 handle_regs_int(urb);
402 case USB_INT_ID_RETRY_FAILED:
403 handle_retry_failed_int(urb);
406 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
407 (unsigned int)hdr->id);
412 r = usb_submit_urb(urb, GFP_ATOMIC);
414 dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
419 kfree(urb->transfer_buffer);
422 static inline int int_urb_interval(struct usb_device *udev)
424 switch (udev->speed) {
435 static inline int usb_int_enabled(struct zd_usb *usb)
438 struct zd_usb_interrupt *intr = &usb->intr;
441 spin_lock_irqsave(&intr->lock, flags);
443 spin_unlock_irqrestore(&intr->lock, flags);
447 int zd_usb_enable_int(struct zd_usb *usb)
450 struct usb_device *udev;
451 struct zd_usb_interrupt *intr = &usb->intr;
452 void *transfer_buffer = NULL;
455 dev_dbg_f(zd_usb_dev(usb), "\n");
457 urb = usb_alloc_urb(0, GFP_NOFS);
463 ZD_ASSERT(!irqs_disabled());
464 spin_lock_irq(&intr->lock);
466 spin_unlock_irq(&intr->lock);
471 spin_unlock_irq(&intr->lock);
473 /* TODO: make it a DMA buffer */
475 transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_NOFS);
476 if (!transfer_buffer) {
477 dev_dbg_f(zd_usb_dev(usb),
478 "couldn't allocate transfer_buffer\n");
479 goto error_set_urb_null;
482 udev = zd_usb_to_usbdev(usb);
483 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
484 transfer_buffer, USB_MAX_EP_INT_BUFFER,
485 int_urb_complete, usb,
488 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
489 r = usb_submit_urb(urb, GFP_NOFS);
491 dev_dbg_f(zd_usb_dev(usb),
492 "Couldn't submit urb. Error number %d\n", r);
498 kfree(transfer_buffer);
500 spin_lock_irq(&intr->lock);
502 spin_unlock_irq(&intr->lock);
509 void zd_usb_disable_int(struct zd_usb *usb)
512 struct zd_usb_interrupt *intr = &usb->intr;
515 spin_lock_irqsave(&intr->lock, flags);
518 spin_unlock_irqrestore(&intr->lock, flags);
522 spin_unlock_irqrestore(&intr->lock, flags);
525 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
529 static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
533 struct zd_mac *mac = zd_usb_to_mac(usb);
534 const struct rx_length_info *length_info;
536 if (length < sizeof(struct rx_length_info)) {
537 /* It's not a complete packet anyhow. */
540 length_info = (struct rx_length_info *)
541 (buffer + length - sizeof(struct rx_length_info));
543 /* It might be that three frames are merged into a single URB
544 * transaction. We have to check for the length info tag.
546 * While testing we discovered that length_info might be unaligned,
547 * because if USB transactions are merged, the last packet will not
548 * be padded. Unaligned access might also happen if the length_info
549 * structure is not present.
551 if (get_unaligned(&length_info->tag) == cpu_to_le16(RX_LENGTH_INFO_TAG))
553 unsigned int l, k, n;
554 for (i = 0, l = 0;; i++) {
555 k = le16_to_cpu(get_unaligned(&length_info->length[i]));
559 zd_mac_rx(mac, buffer+l, k);
565 zd_mac_rx(mac, buffer, length);
569 static void rx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
572 struct zd_usb_rx *rx;
576 switch (urb->status) {
587 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
591 buffer = urb->transfer_buffer;
592 length = urb->actual_length;
596 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
597 /* If there is an old first fragment, we don't care. */
598 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
599 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
600 spin_lock(&rx->lock);
601 memcpy(rx->fragment, buffer, length);
602 rx->fragment_length = length;
603 spin_unlock(&rx->lock);
607 spin_lock(&rx->lock);
608 if (rx->fragment_length > 0) {
609 /* We are on a second fragment, we believe */
610 ZD_ASSERT(length + rx->fragment_length <=
611 ARRAY_SIZE(rx->fragment));
612 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
613 memcpy(rx->fragment+rx->fragment_length, buffer, length);
614 handle_rx_packet(usb, rx->fragment,
615 rx->fragment_length + length);
616 rx->fragment_length = 0;
617 spin_unlock(&rx->lock);
619 spin_unlock(&rx->lock);
620 handle_rx_packet(usb, buffer, length);
624 usb_submit_urb(urb, GFP_ATOMIC);
627 struct urb *alloc_urb(struct zd_usb *usb)
629 struct usb_device *udev = zd_usb_to_usbdev(usb);
633 urb = usb_alloc_urb(0, GFP_NOFS);
636 buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_NOFS,
643 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
644 buffer, USB_MAX_RX_SIZE,
645 rx_urb_complete, usb);
646 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
651 void free_urb(struct urb *urb)
655 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
656 urb->transfer_buffer, urb->transfer_dma);
660 int zd_usb_enable_rx(struct zd_usb *usb)
663 struct zd_usb_rx *rx = &usb->rx;
666 dev_dbg_f(zd_usb_dev(usb), "\n");
669 urbs = kcalloc(URBS_COUNT, sizeof(struct urb *), GFP_NOFS);
672 for (i = 0; i < URBS_COUNT; i++) {
673 urbs[i] = alloc_urb(usb);
678 ZD_ASSERT(!irqs_disabled());
679 spin_lock_irq(&rx->lock);
681 spin_unlock_irq(&rx->lock);
686 rx->urbs_count = URBS_COUNT;
687 spin_unlock_irq(&rx->lock);
689 for (i = 0; i < URBS_COUNT; i++) {
690 r = usb_submit_urb(urbs[i], GFP_NOFS);
697 for (i = 0; i < URBS_COUNT; i++) {
698 usb_kill_urb(urbs[i]);
700 spin_lock_irq(&rx->lock);
703 spin_unlock_irq(&rx->lock);
706 for (i = 0; i < URBS_COUNT; i++)
712 void zd_usb_disable_rx(struct zd_usb *usb)
718 struct zd_usb_rx *rx = &usb->rx;
720 spin_lock_irqsave(&rx->lock, flags);
722 count = rx->urbs_count;
723 spin_unlock_irqrestore(&rx->lock, flags);
727 for (i = 0; i < count; i++) {
728 usb_kill_urb(urbs[i]);
733 spin_lock_irqsave(&rx->lock, flags);
736 spin_unlock_irqrestore(&rx->lock, flags);
739 static void tx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
743 switch (urb->status) {
752 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
755 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
759 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
760 urb->transfer_buffer, urb->transfer_dma);
764 r = usb_submit_urb(urb, GFP_ATOMIC);
766 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
771 /* Puts the frame on the USB endpoint. It doesn't wait for
772 * completion. The frame must contain the control set.
774 int zd_usb_tx(struct zd_usb *usb, const u8 *frame, unsigned int length)
777 struct usb_device *udev = zd_usb_to_usbdev(usb);
781 urb = usb_alloc_urb(0, GFP_ATOMIC);
787 buffer = usb_buffer_alloc(zd_usb_to_usbdev(usb), length, GFP_ATOMIC,
793 memcpy(buffer, frame, length);
795 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
796 buffer, length, tx_urb_complete, NULL);
797 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
799 r = usb_submit_urb(urb, GFP_ATOMIC);
804 usb_buffer_free(zd_usb_to_usbdev(usb), length, buffer,
812 static inline void init_usb_interrupt(struct zd_usb *usb)
814 struct zd_usb_interrupt *intr = &usb->intr;
816 spin_lock_init(&intr->lock);
817 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
818 init_completion(&intr->read_regs.completion);
819 intr->read_regs.cr_int_addr = cpu_to_le16(usb_addr(usb, CR_INTERRUPT));
822 static inline void init_usb_rx(struct zd_usb *usb)
824 struct zd_usb_rx *rx = &usb->rx;
825 spin_lock_init(&rx->lock);
826 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
827 rx->usb_packet_size = 512;
829 rx->usb_packet_size = 64;
831 ZD_ASSERT(rx->fragment_length == 0);
834 static inline void init_usb_tx(struct zd_usb *usb)
836 /* FIXME: at this point we will allocate a fixed number of urb's for
837 * use in a cyclic scheme */
840 void zd_usb_init(struct zd_usb *usb, struct net_device *netdev,
841 struct usb_interface *intf)
843 memset(usb, 0, sizeof(*usb));
844 usb->intf = usb_get_intf(intf);
845 usb_set_intfdata(usb->intf, netdev);
846 init_usb_interrupt(usb);
851 int zd_usb_init_hw(struct zd_usb *usb)
854 struct zd_chip *chip = zd_usb_to_chip(usb);
856 ZD_ASSERT(mutex_is_locked(&chip->mutex));
857 r = zd_ioread16_locked(chip, &usb->fw_base_offset,
858 USB_REG((u16)FW_BASE_ADDR_OFFSET));
861 dev_dbg_f(zd_usb_dev(usb), "fw_base_offset: %#06hx\n",
862 usb->fw_base_offset);
867 void zd_usb_clear(struct zd_usb *usb)
869 usb_set_intfdata(usb->intf, NULL);
870 usb_put_intf(usb->intf);
871 memset(usb, 0, sizeof(*usb));
872 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
875 static const char *speed(enum usb_device_speed speed)
885 return "unknown speed";
889 static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
891 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
892 le16_to_cpu(udev->descriptor.idVendor),
893 le16_to_cpu(udev->descriptor.idProduct),
898 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
900 struct usb_device *udev = interface_to_usbdev(usb->intf);
901 return scnprint_id(udev, buffer, size);
905 static void print_id(struct usb_device *udev)
909 scnprint_id(udev, buffer, sizeof(buffer));
910 buffer[sizeof(buffer)-1] = 0;
911 dev_dbg_f(&udev->dev, "%s\n", buffer);
914 #define print_id(udev) do { } while (0)
917 static int probe(struct usb_interface *intf, const struct usb_device_id *id)
920 struct usb_device *udev = interface_to_usbdev(intf);
921 struct net_device *netdev = NULL;
925 switch (udev->speed) {
931 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
936 netdev = zd_netdev_alloc(intf);
937 if (netdev == NULL) {
942 r = upload_firmware(udev, id->driver_info);
945 "couldn't load firmware. Error number %d\n", r);
949 r = usb_reset_configuration(udev);
951 dev_dbg_f(&intf->dev,
952 "couldn't reset configuration. Error number %d\n", r);
956 /* At this point the interrupt endpoint is not generally enabled. We
957 * save the USB bandwidth until the network device is opened. But
958 * notify that the initialization of the MAC will require the
959 * interrupts to be temporary enabled.
961 r = zd_mac_init_hw(zd_netdev_mac(netdev), id->driver_info);
963 dev_dbg_f(&intf->dev,
964 "couldn't initialize mac. Error number %d\n", r);
968 r = register_netdev(netdev);
970 dev_dbg_f(&intf->dev,
971 "couldn't register netdev. Error number %d\n", r);
975 dev_dbg_f(&intf->dev, "successful\n");
976 dev_info(&intf->dev,"%s\n", netdev->name);
979 usb_reset_device(interface_to_usbdev(intf));
980 zd_netdev_free(netdev);
984 static void disconnect(struct usb_interface *intf)
986 struct net_device *netdev = zd_intf_to_netdev(intf);
987 struct zd_mac *mac = zd_netdev_mac(netdev);
988 struct zd_usb *usb = &mac->chip.usb;
990 dev_dbg_f(zd_usb_dev(usb), "\n");
992 zd_netdev_disconnect(netdev);
994 /* Just in case something has gone wrong! */
995 zd_usb_disable_rx(usb);
996 zd_usb_disable_int(usb);
998 /* If the disconnect has been caused by a removal of the
999 * driver module, the reset allows reloading of the driver. If the
1000 * reset will not be executed here, the upload of the firmware in the
1001 * probe function caused by the reloading of the driver will fail.
1003 usb_reset_device(interface_to_usbdev(intf));
1005 /* If somebody still waits on this lock now, this is an error. */
1006 zd_netdev_free(netdev);
1007 dev_dbg(&intf->dev, "disconnected\n");
1010 static struct usb_driver driver = {
1012 .id_table = usb_ids,
1014 .disconnect = disconnect,
1017 static int __init usb_init(void)
1021 pr_debug("usb_init()\n");
1023 r = usb_register(&driver);
1025 printk(KERN_ERR "usb_register() failed. Error number %d\n", r);
1029 pr_debug("zd1211rw initialized\n");
1033 static void __exit usb_exit(void)
1035 pr_debug("usb_exit()\n");
1036 usb_deregister(&driver);
1039 module_init(usb_init);
1040 module_exit(usb_exit);
1042 static int usb_int_regs_length(unsigned int count)
1044 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1047 static void prepare_read_regs_int(struct zd_usb *usb)
1049 struct zd_usb_interrupt *intr = &usb->intr;
1051 spin_lock(&intr->lock);
1052 intr->read_regs_enabled = 1;
1053 INIT_COMPLETION(intr->read_regs.completion);
1054 spin_unlock(&intr->lock);
1057 static int get_results(struct zd_usb *usb, u16 *values,
1058 struct usb_req_read_regs *req, unsigned int count)
1062 struct zd_usb_interrupt *intr = &usb->intr;
1063 struct read_regs_int *rr = &intr->read_regs;
1064 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1066 spin_lock(&intr->lock);
1069 /* The created block size seems to be larger than expected.
1070 * However results appear to be correct.
1072 if (rr->length < usb_int_regs_length(count)) {
1073 dev_dbg_f(zd_usb_dev(usb),
1074 "error: actual length %d less than expected %d\n",
1075 rr->length, usb_int_regs_length(count));
1078 if (rr->length > sizeof(rr->buffer)) {
1079 dev_dbg_f(zd_usb_dev(usb),
1080 "error: actual length %d exceeds buffer size %zu\n",
1081 rr->length, sizeof(rr->buffer));
1085 for (i = 0; i < count; i++) {
1086 struct reg_data *rd = ®s->regs[i];
1087 if (rd->addr != req->addr[i]) {
1088 dev_dbg_f(zd_usb_dev(usb),
1089 "rd[%d] addr %#06hx expected %#06hx\n", i,
1090 le16_to_cpu(rd->addr),
1091 le16_to_cpu(req->addr[i]));
1094 values[i] = le16_to_cpu(rd->value);
1099 spin_unlock(&intr->lock);
1103 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1104 const zd_addr_t *addresses, unsigned int count)
1107 int i, req_len, actual_req_len;
1108 struct usb_device *udev;
1109 struct usb_req_read_regs *req = NULL;
1110 unsigned long timeout;
1113 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1116 if (count > USB_MAX_IOREAD16_COUNT) {
1117 dev_dbg_f(zd_usb_dev(usb),
1118 "error: count %u exceeds possible max %u\n",
1119 count, USB_MAX_IOREAD16_COUNT);
1123 dev_dbg_f(zd_usb_dev(usb),
1124 "error: io in atomic context not supported\n");
1125 return -EWOULDBLOCK;
1127 if (!usb_int_enabled(usb)) {
1128 dev_dbg_f(zd_usb_dev(usb),
1129 "error: usb interrupt not enabled\n");
1130 return -EWOULDBLOCK;
1133 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1134 req = kmalloc(req_len, GFP_NOFS);
1137 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1138 for (i = 0; i < count; i++)
1139 req->addr[i] = cpu_to_le16(usb_addr(usb, addresses[i]));
1141 udev = zd_usb_to_usbdev(usb);
1142 prepare_read_regs_int(usb);
1143 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1144 req, req_len, &actual_req_len, 1000 /* ms */);
1146 dev_dbg_f(zd_usb_dev(usb),
1147 "error in usb_bulk_msg(). Error number %d\n", r);
1150 if (req_len != actual_req_len) {
1151 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1152 " req_len %d != actual_req_len %d\n",
1153 req_len, actual_req_len);
1158 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1159 msecs_to_jiffies(1000));
1161 disable_read_regs_int(usb);
1162 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1167 r = get_results(usb, values, req, count);
1173 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1177 struct usb_device *udev;
1178 struct usb_req_write_regs *req = NULL;
1179 int i, req_len, actual_req_len;
1183 if (count > USB_MAX_IOWRITE16_COUNT) {
1184 dev_dbg_f(zd_usb_dev(usb),
1185 "error: count %u exceeds possible max %u\n",
1186 count, USB_MAX_IOWRITE16_COUNT);
1190 dev_dbg_f(zd_usb_dev(usb),
1191 "error: io in atomic context not supported\n");
1192 return -EWOULDBLOCK;
1195 req_len = sizeof(struct usb_req_write_regs) +
1196 count * sizeof(struct reg_data);
1197 req = kmalloc(req_len, GFP_NOFS);
1201 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1202 for (i = 0; i < count; i++) {
1203 struct reg_data *rw = &req->reg_writes[i];
1204 rw->addr = cpu_to_le16(usb_addr(usb, ioreqs[i].addr));
1205 rw->value = cpu_to_le16(ioreqs[i].value);
1208 udev = zd_usb_to_usbdev(usb);
1209 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1210 req, req_len, &actual_req_len, 1000 /* ms */);
1212 dev_dbg_f(zd_usb_dev(usb),
1213 "error in usb_bulk_msg(). Error number %d\n", r);
1216 if (req_len != actual_req_len) {
1217 dev_dbg_f(zd_usb_dev(usb),
1218 "error in usb_bulk_msg()"
1219 " req_len %d != actual_req_len %d\n",
1220 req_len, actual_req_len);
1225 /* FALL-THROUGH with r == 0 */
1231 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1234 struct usb_device *udev;
1235 struct usb_req_rfwrite *req = NULL;
1236 int i, req_len, actual_req_len;
1237 u16 bit_value_template;
1240 dev_dbg_f(zd_usb_dev(usb),
1241 "error: io in atomic context not supported\n");
1242 return -EWOULDBLOCK;
1244 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1245 dev_dbg_f(zd_usb_dev(usb),
1246 "error: bits %d are smaller than"
1247 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1248 bits, USB_MIN_RFWRITE_BIT_COUNT);
1251 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1252 dev_dbg_f(zd_usb_dev(usb),
1253 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1254 bits, USB_MAX_RFWRITE_BIT_COUNT);
1258 if (value & (~0UL << bits)) {
1259 dev_dbg_f(zd_usb_dev(usb),
1260 "error: value %#09x has bits >= %d set\n",
1266 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1268 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1270 dev_dbg_f(zd_usb_dev(usb),
1271 "error %d: Couldn't read CR203\n", r);
1274 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1276 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1277 req = kmalloc(req_len, GFP_NOFS);
1281 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1282 /* 1: 3683a, but not used in ZYDAS driver */
1283 req->value = cpu_to_le16(2);
1284 req->bits = cpu_to_le16(bits);
1286 for (i = 0; i < bits; i++) {
1287 u16 bv = bit_value_template;
1288 if (value & (1 << (bits-1-i)))
1290 req->bit_values[i] = cpu_to_le16(bv);
1293 udev = zd_usb_to_usbdev(usb);
1294 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1295 req, req_len, &actual_req_len, 1000 /* ms */);
1297 dev_dbg_f(zd_usb_dev(usb),
1298 "error in usb_bulk_msg(). Error number %d\n", r);
1301 if (req_len != actual_req_len) {
1302 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1303 " req_len %d != actual_req_len %d\n",
1304 req_len, actual_req_len);
1309 /* FALL-THROUGH with r == 0 */