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 },
44 { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
45 { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
46 { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
50 MODULE_LICENSE("GPL");
51 MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
52 MODULE_AUTHOR("Ulrich Kunitz");
53 MODULE_AUTHOR("Daniel Drake");
54 MODULE_VERSION("1.0");
55 MODULE_DEVICE_TABLE(usb, usb_ids);
57 #define FW_ZD1211_PREFIX "zd1211/zd1211_"
58 #define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
60 /* register address handling */
63 static int check_addr(struct zd_usb *usb, zd_addr_t addr)
65 u32 base = ZD_ADDR_BASE(addr);
66 u32 offset = ZD_OFFSET(addr);
68 if ((u32)addr & ADDR_ZERO_MASK)
74 if (offset > CR_MAX_OFFSET) {
75 dev_dbg(zd_usb_dev(usb),
76 "CR offset %#010x larger than"
77 " CR_MAX_OFFSET %#10x\n",
78 offset, CR_MAX_OFFSET);
82 dev_dbg(zd_usb_dev(usb),
83 "CR offset %#010x is not a multiple of 2\n",
89 if (offset > E2P_MAX_OFFSET) {
90 dev_dbg(zd_usb_dev(usb),
91 "E2P offset %#010x larger than"
92 " E2P_MAX_OFFSET %#010x\n",
93 offset, E2P_MAX_OFFSET);
98 if (!usb->fw_base_offset) {
99 dev_dbg(zd_usb_dev(usb),
100 "ERROR: fw base offset has not been set\n");
103 if (offset > FW_MAX_OFFSET) {
104 dev_dbg(zd_usb_dev(usb),
105 "FW offset %#10x is larger than"
106 " FW_MAX_OFFSET %#010x\n",
107 offset, FW_MAX_OFFSET);
108 goto invalid_address;
112 dev_dbg(zd_usb_dev(usb),
113 "address has unsupported base %#010x\n", addr);
114 goto invalid_address;
119 dev_dbg(zd_usb_dev(usb),
120 "ERROR: invalid address: %#010x\n", addr);
125 static u16 usb_addr(struct zd_usb *usb, zd_addr_t addr)
130 base = ZD_ADDR_BASE(addr);
131 offset = ZD_OFFSET(addr);
133 ZD_ASSERT(check_addr(usb, addr) == 0);
137 offset += CR_BASE_OFFSET;
140 offset += E2P_BASE_OFFSET;
143 offset += usb->fw_base_offset;
150 /* USB device initialization */
152 static int request_fw_file(
153 const struct firmware **fw, const char *name, struct device *device)
157 dev_dbg_f(device, "fw name %s\n", name);
159 r = request_firmware(fw, name, device);
162 "Could not load firmware file %s. Error number %d\n",
167 static inline u16 get_bcdDevice(const struct usb_device *udev)
169 return le16_to_cpu(udev->descriptor.bcdDevice);
172 enum upload_code_flags {
176 /* Ensures that MAX_TRANSFER_SIZE is even. */
177 #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
179 static int upload_code(struct usb_device *udev,
180 const u8 *data, size_t size, u16 code_offset, int flags)
185 /* USB request blocks need "kmalloced" buffers.
187 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
189 dev_err(&udev->dev, "out of memory\n");
196 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
197 size : MAX_TRANSFER_SIZE;
199 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
201 memcpy(p, data, transfer_size);
202 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
203 USB_REQ_FIRMWARE_DOWNLOAD,
204 USB_DIR_OUT | USB_TYPE_VENDOR,
205 code_offset, 0, p, transfer_size, 1000 /* ms */);
208 "USB control request for firmware upload"
209 " failed. Error number %d\n", r);
212 transfer_size = r & ~1;
214 size -= transfer_size;
215 data += transfer_size;
216 code_offset += transfer_size/sizeof(u16);
219 if (flags & REBOOT) {
222 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
223 USB_REQ_FIRMWARE_CONFIRM,
224 USB_DIR_IN | USB_TYPE_VENDOR,
225 0, 0, &ret, sizeof(ret), 5000 /* ms */);
226 if (r != sizeof(ret)) {
228 "control request firmeware confirmation failed."
229 " Return value %d\n", r);
236 "Internal error while downloading."
237 " Firmware confirm return value %#04x\n",
242 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
252 static u16 get_word(const void *data, u16 offset)
254 const __le16 *p = data;
255 return le16_to_cpu(p[offset]);
258 static char *get_fw_name(char *buffer, size_t size, u8 device_type,
261 scnprintf(buffer, size, "%s%s",
262 device_type == DEVICE_ZD1211B ?
263 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
268 static int upload_firmware(struct usb_device *udev, u8 device_type)
273 const struct firmware *ub_fw = NULL;
274 const struct firmware *uph_fw = NULL;
277 bcdDevice = get_bcdDevice(udev);
279 r = request_fw_file(&ub_fw,
280 get_fw_name(fw_name, sizeof(fw_name), device_type, "ub"),
285 fw_bcdDevice = get_word(ub_fw->data, EEPROM_REGS_OFFSET);
287 /* FIXME: do we have any reason to perform the kludge that the vendor
288 * driver does when there is a version mismatch? (their driver uploads
289 * different firmwares and stuff)
291 if (fw_bcdDevice != bcdDevice) {
293 "firmware device id %#06x and actual device id "
294 "%#06x differ, continuing anyway\n",
295 fw_bcdDevice, bcdDevice);
297 dev_dbg_f(&udev->dev,
298 "firmware device id %#06x is equal to the "
299 "actual device id\n", fw_bcdDevice);
303 r = request_fw_file(&uph_fw,
304 get_fw_name(fw_name, sizeof(fw_name), device_type, "uphr"),
309 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START_OFFSET,
313 "Could not upload firmware code uph. Error number %d\n",
319 release_firmware(ub_fw);
320 release_firmware(uph_fw);
324 static void disable_read_regs_int(struct zd_usb *usb)
326 struct zd_usb_interrupt *intr = &usb->intr;
328 spin_lock(&intr->lock);
329 intr->read_regs_enabled = 0;
330 spin_unlock(&intr->lock);
333 #define urb_dev(urb) (&(urb)->dev->dev)
335 static inline void handle_regs_int(struct urb *urb)
337 struct zd_usb *usb = urb->context;
338 struct zd_usb_interrupt *intr = &usb->intr;
341 ZD_ASSERT(in_interrupt());
342 spin_lock(&intr->lock);
344 if (intr->read_regs_enabled) {
345 intr->read_regs.length = len = urb->actual_length;
347 if (len > sizeof(intr->read_regs.buffer))
348 len = sizeof(intr->read_regs.buffer);
349 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
350 intr->read_regs_enabled = 0;
351 complete(&intr->read_regs.completion);
355 dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n");
357 spin_unlock(&intr->lock);
360 static inline void handle_retry_failed_int(struct urb *urb)
362 dev_dbg_f(urb_dev(urb), "retry failed interrupt\n");
366 static void int_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
369 struct usb_int_header *hdr;
371 switch (urb->status) {
385 if (urb->actual_length < sizeof(hdr)) {
386 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
390 hdr = urb->transfer_buffer;
391 if (hdr->type != USB_INT_TYPE) {
392 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
397 case USB_INT_ID_REGS:
398 handle_regs_int(urb);
400 case USB_INT_ID_RETRY_FAILED:
401 handle_retry_failed_int(urb);
404 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
405 (unsigned int)hdr->id);
410 r = usb_submit_urb(urb, GFP_ATOMIC);
412 dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
417 kfree(urb->transfer_buffer);
420 static inline int int_urb_interval(struct usb_device *udev)
422 switch (udev->speed) {
433 static inline int usb_int_enabled(struct zd_usb *usb)
436 struct zd_usb_interrupt *intr = &usb->intr;
439 spin_lock_irqsave(&intr->lock, flags);
441 spin_unlock_irqrestore(&intr->lock, flags);
445 int zd_usb_enable_int(struct zd_usb *usb)
448 struct usb_device *udev;
449 struct zd_usb_interrupt *intr = &usb->intr;
450 void *transfer_buffer = NULL;
453 dev_dbg_f(zd_usb_dev(usb), "\n");
455 urb = usb_alloc_urb(0, GFP_NOFS);
461 ZD_ASSERT(!irqs_disabled());
462 spin_lock_irq(&intr->lock);
464 spin_unlock_irq(&intr->lock);
469 spin_unlock_irq(&intr->lock);
471 /* TODO: make it a DMA buffer */
473 transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_NOFS);
474 if (!transfer_buffer) {
475 dev_dbg_f(zd_usb_dev(usb),
476 "couldn't allocate transfer_buffer\n");
477 goto error_set_urb_null;
480 udev = zd_usb_to_usbdev(usb);
481 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
482 transfer_buffer, USB_MAX_EP_INT_BUFFER,
483 int_urb_complete, usb,
486 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
487 r = usb_submit_urb(urb, GFP_NOFS);
489 dev_dbg_f(zd_usb_dev(usb),
490 "Couldn't submit urb. Error number %d\n", r);
496 kfree(transfer_buffer);
498 spin_lock_irq(&intr->lock);
500 spin_unlock_irq(&intr->lock);
507 void zd_usb_disable_int(struct zd_usb *usb)
510 struct zd_usb_interrupt *intr = &usb->intr;
513 spin_lock_irqsave(&intr->lock, flags);
516 spin_unlock_irqrestore(&intr->lock, flags);
520 spin_unlock_irqrestore(&intr->lock, flags);
523 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
527 static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
531 struct zd_mac *mac = zd_usb_to_mac(usb);
532 const struct rx_length_info *length_info;
534 if (length < sizeof(struct rx_length_info)) {
535 /* It's not a complete packet anyhow. */
538 length_info = (struct rx_length_info *)
539 (buffer + length - sizeof(struct rx_length_info));
541 /* It might be that three frames are merged into a single URB
542 * transaction. We have to check for the length info tag.
544 * While testing we discovered that length_info might be unaligned,
545 * because if USB transactions are merged, the last packet will not
546 * be padded. Unaligned access might also happen if the length_info
547 * structure is not present.
549 if (get_unaligned(&length_info->tag) == cpu_to_le16(RX_LENGTH_INFO_TAG))
551 unsigned int l, k, n;
552 for (i = 0, l = 0;; i++) {
553 k = le16_to_cpu(get_unaligned(&length_info->length[i]));
557 zd_mac_rx(mac, buffer+l, k);
563 zd_mac_rx(mac, buffer, length);
567 static void rx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
570 struct zd_usb_rx *rx;
574 switch (urb->status) {
585 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
589 buffer = urb->transfer_buffer;
590 length = urb->actual_length;
594 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
595 /* If there is an old first fragment, we don't care. */
596 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
597 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
598 spin_lock(&rx->lock);
599 memcpy(rx->fragment, buffer, length);
600 rx->fragment_length = length;
601 spin_unlock(&rx->lock);
605 spin_lock(&rx->lock);
606 if (rx->fragment_length > 0) {
607 /* We are on a second fragment, we believe */
608 ZD_ASSERT(length + rx->fragment_length <=
609 ARRAY_SIZE(rx->fragment));
610 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
611 memcpy(rx->fragment+rx->fragment_length, buffer, length);
612 handle_rx_packet(usb, rx->fragment,
613 rx->fragment_length + length);
614 rx->fragment_length = 0;
615 spin_unlock(&rx->lock);
617 spin_unlock(&rx->lock);
618 handle_rx_packet(usb, buffer, length);
622 usb_submit_urb(urb, GFP_ATOMIC);
625 struct urb *alloc_urb(struct zd_usb *usb)
627 struct usb_device *udev = zd_usb_to_usbdev(usb);
631 urb = usb_alloc_urb(0, GFP_NOFS);
634 buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_NOFS,
641 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
642 buffer, USB_MAX_RX_SIZE,
643 rx_urb_complete, usb);
644 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
649 void free_urb(struct urb *urb)
653 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
654 urb->transfer_buffer, urb->transfer_dma);
658 int zd_usb_enable_rx(struct zd_usb *usb)
661 struct zd_usb_rx *rx = &usb->rx;
664 dev_dbg_f(zd_usb_dev(usb), "\n");
667 urbs = kcalloc(URBS_COUNT, sizeof(struct urb *), GFP_NOFS);
670 for (i = 0; i < URBS_COUNT; i++) {
671 urbs[i] = alloc_urb(usb);
676 ZD_ASSERT(!irqs_disabled());
677 spin_lock_irq(&rx->lock);
679 spin_unlock_irq(&rx->lock);
684 rx->urbs_count = URBS_COUNT;
685 spin_unlock_irq(&rx->lock);
687 for (i = 0; i < URBS_COUNT; i++) {
688 r = usb_submit_urb(urbs[i], GFP_NOFS);
695 for (i = 0; i < URBS_COUNT; i++) {
696 usb_kill_urb(urbs[i]);
698 spin_lock_irq(&rx->lock);
701 spin_unlock_irq(&rx->lock);
704 for (i = 0; i < URBS_COUNT; i++)
710 void zd_usb_disable_rx(struct zd_usb *usb)
716 struct zd_usb_rx *rx = &usb->rx;
718 spin_lock_irqsave(&rx->lock, flags);
720 count = rx->urbs_count;
721 spin_unlock_irqrestore(&rx->lock, flags);
725 for (i = 0; i < count; i++) {
726 usb_kill_urb(urbs[i]);
731 spin_lock_irqsave(&rx->lock, flags);
734 spin_unlock_irqrestore(&rx->lock, flags);
737 static void tx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
741 switch (urb->status) {
750 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
753 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
757 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
758 urb->transfer_buffer, urb->transfer_dma);
762 r = usb_submit_urb(urb, GFP_ATOMIC);
764 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
769 /* Puts the frame on the USB endpoint. It doesn't wait for
770 * completion. The frame must contain the control set.
772 int zd_usb_tx(struct zd_usb *usb, const u8 *frame, unsigned int length)
775 struct usb_device *udev = zd_usb_to_usbdev(usb);
779 urb = usb_alloc_urb(0, GFP_ATOMIC);
785 buffer = usb_buffer_alloc(zd_usb_to_usbdev(usb), length, GFP_ATOMIC,
791 memcpy(buffer, frame, length);
793 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
794 buffer, length, tx_urb_complete, NULL);
795 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
797 r = usb_submit_urb(urb, GFP_ATOMIC);
802 usb_buffer_free(zd_usb_to_usbdev(usb), length, buffer,
810 static inline void init_usb_interrupt(struct zd_usb *usb)
812 struct zd_usb_interrupt *intr = &usb->intr;
814 spin_lock_init(&intr->lock);
815 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
816 init_completion(&intr->read_regs.completion);
817 intr->read_regs.cr_int_addr = cpu_to_le16(usb_addr(usb, CR_INTERRUPT));
820 static inline void init_usb_rx(struct zd_usb *usb)
822 struct zd_usb_rx *rx = &usb->rx;
823 spin_lock_init(&rx->lock);
824 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
825 rx->usb_packet_size = 512;
827 rx->usb_packet_size = 64;
829 ZD_ASSERT(rx->fragment_length == 0);
832 static inline void init_usb_tx(struct zd_usb *usb)
834 /* FIXME: at this point we will allocate a fixed number of urb's for
835 * use in a cyclic scheme */
838 void zd_usb_init(struct zd_usb *usb, struct net_device *netdev,
839 struct usb_interface *intf)
841 memset(usb, 0, sizeof(*usb));
842 usb->intf = usb_get_intf(intf);
843 usb_set_intfdata(usb->intf, netdev);
844 init_usb_interrupt(usb);
849 int zd_usb_init_hw(struct zd_usb *usb)
852 struct zd_chip *chip = zd_usb_to_chip(usb);
854 ZD_ASSERT(mutex_is_locked(&chip->mutex));
855 r = zd_ioread16_locked(chip, &usb->fw_base_offset,
856 USB_REG((u16)FW_BASE_ADDR_OFFSET));
859 dev_dbg_f(zd_usb_dev(usb), "fw_base_offset: %#06hx\n",
860 usb->fw_base_offset);
865 void zd_usb_clear(struct zd_usb *usb)
867 usb_set_intfdata(usb->intf, NULL);
868 usb_put_intf(usb->intf);
869 memset(usb, 0, sizeof(*usb));
870 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
873 static const char *speed(enum usb_device_speed speed)
883 return "unknown speed";
887 static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
889 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
890 le16_to_cpu(udev->descriptor.idVendor),
891 le16_to_cpu(udev->descriptor.idProduct),
896 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
898 struct usb_device *udev = interface_to_usbdev(usb->intf);
899 return scnprint_id(udev, buffer, size);
903 static void print_id(struct usb_device *udev)
907 scnprint_id(udev, buffer, sizeof(buffer));
908 buffer[sizeof(buffer)-1] = 0;
909 dev_dbg_f(&udev->dev, "%s\n", buffer);
912 #define print_id(udev) do { } while (0)
915 static int probe(struct usb_interface *intf, const struct usb_device_id *id)
918 struct usb_device *udev = interface_to_usbdev(intf);
919 struct net_device *netdev = NULL;
923 switch (udev->speed) {
929 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
934 netdev = zd_netdev_alloc(intf);
935 if (netdev == NULL) {
940 r = upload_firmware(udev, id->driver_info);
943 "couldn't load firmware. Error number %d\n", r);
947 r = usb_reset_configuration(udev);
949 dev_dbg_f(&intf->dev,
950 "couldn't reset configuration. Error number %d\n", r);
954 /* At this point the interrupt endpoint is not generally enabled. We
955 * save the USB bandwidth until the network device is opened. But
956 * notify that the initialization of the MAC will require the
957 * interrupts to be temporary enabled.
959 r = zd_mac_init_hw(zd_netdev_mac(netdev), id->driver_info);
961 dev_dbg_f(&intf->dev,
962 "couldn't initialize mac. Error number %d\n", r);
966 r = register_netdev(netdev);
968 dev_dbg_f(&intf->dev,
969 "couldn't register netdev. Error number %d\n", r);
973 dev_dbg_f(&intf->dev, "successful\n");
974 dev_info(&intf->dev,"%s\n", netdev->name);
977 usb_reset_device(interface_to_usbdev(intf));
978 zd_netdev_free(netdev);
982 static void disconnect(struct usb_interface *intf)
984 struct net_device *netdev = zd_intf_to_netdev(intf);
985 struct zd_mac *mac = zd_netdev_mac(netdev);
986 struct zd_usb *usb = &mac->chip.usb;
988 dev_dbg_f(zd_usb_dev(usb), "\n");
990 zd_netdev_disconnect(netdev);
992 /* Just in case something has gone wrong! */
993 zd_usb_disable_rx(usb);
994 zd_usb_disable_int(usb);
996 /* If the disconnect has been caused by a removal of the
997 * driver module, the reset allows reloading of the driver. If the
998 * reset will not be executed here, the upload of the firmware in the
999 * probe function caused by the reloading of the driver will fail.
1001 usb_reset_device(interface_to_usbdev(intf));
1003 /* If somebody still waits on this lock now, this is an error. */
1004 zd_netdev_free(netdev);
1005 dev_dbg(&intf->dev, "disconnected\n");
1008 static struct usb_driver driver = {
1010 .id_table = usb_ids,
1012 .disconnect = disconnect,
1015 static int __init usb_init(void)
1019 pr_debug("usb_init()\n");
1021 r = usb_register(&driver);
1023 printk(KERN_ERR "usb_register() failed. Error number %d\n", r);
1027 pr_debug("zd1211rw initialized\n");
1031 static void __exit usb_exit(void)
1033 pr_debug("usb_exit()\n");
1034 usb_deregister(&driver);
1037 module_init(usb_init);
1038 module_exit(usb_exit);
1040 static int usb_int_regs_length(unsigned int count)
1042 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1045 static void prepare_read_regs_int(struct zd_usb *usb)
1047 struct zd_usb_interrupt *intr = &usb->intr;
1049 spin_lock(&intr->lock);
1050 intr->read_regs_enabled = 1;
1051 INIT_COMPLETION(intr->read_regs.completion);
1052 spin_unlock(&intr->lock);
1055 static int get_results(struct zd_usb *usb, u16 *values,
1056 struct usb_req_read_regs *req, unsigned int count)
1060 struct zd_usb_interrupt *intr = &usb->intr;
1061 struct read_regs_int *rr = &intr->read_regs;
1062 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1064 spin_lock(&intr->lock);
1067 /* The created block size seems to be larger than expected.
1068 * However results appear to be correct.
1070 if (rr->length < usb_int_regs_length(count)) {
1071 dev_dbg_f(zd_usb_dev(usb),
1072 "error: actual length %d less than expected %d\n",
1073 rr->length, usb_int_regs_length(count));
1076 if (rr->length > sizeof(rr->buffer)) {
1077 dev_dbg_f(zd_usb_dev(usb),
1078 "error: actual length %d exceeds buffer size %zu\n",
1079 rr->length, sizeof(rr->buffer));
1083 for (i = 0; i < count; i++) {
1084 struct reg_data *rd = ®s->regs[i];
1085 if (rd->addr != req->addr[i]) {
1086 dev_dbg_f(zd_usb_dev(usb),
1087 "rd[%d] addr %#06hx expected %#06hx\n", i,
1088 le16_to_cpu(rd->addr),
1089 le16_to_cpu(req->addr[i]));
1092 values[i] = le16_to_cpu(rd->value);
1097 spin_unlock(&intr->lock);
1101 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1102 const zd_addr_t *addresses, unsigned int count)
1105 int i, req_len, actual_req_len;
1106 struct usb_device *udev;
1107 struct usb_req_read_regs *req = NULL;
1108 unsigned long timeout;
1111 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1114 if (count > USB_MAX_IOREAD16_COUNT) {
1115 dev_dbg_f(zd_usb_dev(usb),
1116 "error: count %u exceeds possible max %u\n",
1117 count, USB_MAX_IOREAD16_COUNT);
1121 dev_dbg_f(zd_usb_dev(usb),
1122 "error: io in atomic context not supported\n");
1123 return -EWOULDBLOCK;
1125 if (!usb_int_enabled(usb)) {
1126 dev_dbg_f(zd_usb_dev(usb),
1127 "error: usb interrupt not enabled\n");
1128 return -EWOULDBLOCK;
1131 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1132 req = kmalloc(req_len, GFP_NOFS);
1135 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1136 for (i = 0; i < count; i++)
1137 req->addr[i] = cpu_to_le16(usb_addr(usb, addresses[i]));
1139 udev = zd_usb_to_usbdev(usb);
1140 prepare_read_regs_int(usb);
1141 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1142 req, req_len, &actual_req_len, 1000 /* ms */);
1144 dev_dbg_f(zd_usb_dev(usb),
1145 "error in usb_bulk_msg(). Error number %d\n", r);
1148 if (req_len != actual_req_len) {
1149 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1150 " req_len %d != actual_req_len %d\n",
1151 req_len, actual_req_len);
1156 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1157 msecs_to_jiffies(1000));
1159 disable_read_regs_int(usb);
1160 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1165 r = get_results(usb, values, req, count);
1171 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1175 struct usb_device *udev;
1176 struct usb_req_write_regs *req = NULL;
1177 int i, req_len, actual_req_len;
1181 if (count > USB_MAX_IOWRITE16_COUNT) {
1182 dev_dbg_f(zd_usb_dev(usb),
1183 "error: count %u exceeds possible max %u\n",
1184 count, USB_MAX_IOWRITE16_COUNT);
1188 dev_dbg_f(zd_usb_dev(usb),
1189 "error: io in atomic context not supported\n");
1190 return -EWOULDBLOCK;
1193 req_len = sizeof(struct usb_req_write_regs) +
1194 count * sizeof(struct reg_data);
1195 req = kmalloc(req_len, GFP_NOFS);
1199 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1200 for (i = 0; i < count; i++) {
1201 struct reg_data *rw = &req->reg_writes[i];
1202 rw->addr = cpu_to_le16(usb_addr(usb, ioreqs[i].addr));
1203 rw->value = cpu_to_le16(ioreqs[i].value);
1206 udev = zd_usb_to_usbdev(usb);
1207 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1208 req, req_len, &actual_req_len, 1000 /* ms */);
1210 dev_dbg_f(zd_usb_dev(usb),
1211 "error in usb_bulk_msg(). Error number %d\n", r);
1214 if (req_len != actual_req_len) {
1215 dev_dbg_f(zd_usb_dev(usb),
1216 "error in usb_bulk_msg()"
1217 " req_len %d != actual_req_len %d\n",
1218 req_len, actual_req_len);
1223 /* FALL-THROUGH with r == 0 */
1229 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1232 struct usb_device *udev;
1233 struct usb_req_rfwrite *req = NULL;
1234 int i, req_len, actual_req_len;
1235 u16 bit_value_template;
1238 dev_dbg_f(zd_usb_dev(usb),
1239 "error: io in atomic context not supported\n");
1240 return -EWOULDBLOCK;
1242 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1243 dev_dbg_f(zd_usb_dev(usb),
1244 "error: bits %d are smaller than"
1245 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1246 bits, USB_MIN_RFWRITE_BIT_COUNT);
1249 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1250 dev_dbg_f(zd_usb_dev(usb),
1251 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1252 bits, USB_MAX_RFWRITE_BIT_COUNT);
1256 if (value & (~0UL << bits)) {
1257 dev_dbg_f(zd_usb_dev(usb),
1258 "error: value %#09x has bits >= %d set\n",
1264 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1266 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1268 dev_dbg_f(zd_usb_dev(usb),
1269 "error %d: Couldn't read CR203\n", r);
1272 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1274 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1275 req = kmalloc(req_len, GFP_NOFS);
1279 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1280 /* 1: 3683a, but not used in ZYDAS driver */
1281 req->value = cpu_to_le16(2);
1282 req->bits = cpu_to_le16(bits);
1284 for (i = 0; i < bits; i++) {
1285 u16 bv = bit_value_template;
1286 if (value & (1 << (bits-1-i)))
1288 req->bit_values[i] = cpu_to_le16(bv);
1291 udev = zd_usb_to_usbdev(usb);
1292 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1293 req, req_len, &actual_req_len, 1000 /* ms */);
1295 dev_dbg_f(zd_usb_dev(usb),
1296 "error in usb_bulk_msg(). Error number %d\n", r);
1299 if (req_len != actual_req_len) {
1300 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1301 " req_len %d != actual_req_len %d\n",
1302 req_len, actual_req_len);
1307 /* FALL-THROUGH with r == 0 */