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 ZD_ASSERT(in_interrupt());
329 spin_lock(&intr->lock);
330 intr->read_regs_enabled = 0;
331 spin_unlock(&intr->lock);
334 #define urb_dev(urb) (&(urb)->dev->dev)
336 static inline void handle_regs_int(struct urb *urb)
338 struct zd_usb *usb = urb->context;
339 struct zd_usb_interrupt *intr = &usb->intr;
342 ZD_ASSERT(in_interrupt());
343 spin_lock(&intr->lock);
345 if (intr->read_regs_enabled) {
346 intr->read_regs.length = len = urb->actual_length;
348 if (len > sizeof(intr->read_regs.buffer))
349 len = sizeof(intr->read_regs.buffer);
350 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
351 intr->read_regs_enabled = 0;
352 complete(&intr->read_regs.completion);
356 dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n");
358 spin_unlock(&intr->lock);
361 static inline void handle_retry_failed_int(struct urb *urb)
363 dev_dbg_f(urb_dev(urb), "retry failed interrupt\n");
367 static void int_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
370 struct usb_int_header *hdr;
372 switch (urb->status) {
386 if (urb->actual_length < sizeof(hdr)) {
387 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
391 hdr = urb->transfer_buffer;
392 if (hdr->type != USB_INT_TYPE) {
393 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
398 case USB_INT_ID_REGS:
399 handle_regs_int(urb);
401 case USB_INT_ID_RETRY_FAILED:
402 handle_retry_failed_int(urb);
405 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
406 (unsigned int)hdr->id);
411 r = usb_submit_urb(urb, GFP_ATOMIC);
413 dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
418 kfree(urb->transfer_buffer);
421 static inline int int_urb_interval(struct usb_device *udev)
423 switch (udev->speed) {
434 static inline int usb_int_enabled(struct zd_usb *usb)
437 struct zd_usb_interrupt *intr = &usb->intr;
440 spin_lock_irqsave(&intr->lock, flags);
442 spin_unlock_irqrestore(&intr->lock, flags);
446 int zd_usb_enable_int(struct zd_usb *usb)
449 struct usb_device *udev;
450 struct zd_usb_interrupt *intr = &usb->intr;
451 void *transfer_buffer = NULL;
454 dev_dbg_f(zd_usb_dev(usb), "\n");
456 urb = usb_alloc_urb(0, GFP_NOFS);
462 ZD_ASSERT(!irqs_disabled());
463 spin_lock_irq(&intr->lock);
465 spin_unlock_irq(&intr->lock);
470 spin_unlock_irq(&intr->lock);
472 /* TODO: make it a DMA buffer */
474 transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_NOFS);
475 if (!transfer_buffer) {
476 dev_dbg_f(zd_usb_dev(usb),
477 "couldn't allocate transfer_buffer\n");
478 goto error_set_urb_null;
481 udev = zd_usb_to_usbdev(usb);
482 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
483 transfer_buffer, USB_MAX_EP_INT_BUFFER,
484 int_urb_complete, usb,
487 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
488 r = usb_submit_urb(urb, GFP_NOFS);
490 dev_dbg_f(zd_usb_dev(usb),
491 "Couldn't submit urb. Error number %d\n", r);
497 kfree(transfer_buffer);
499 spin_lock_irq(&intr->lock);
501 spin_unlock_irq(&intr->lock);
508 void zd_usb_disable_int(struct zd_usb *usb)
511 struct zd_usb_interrupt *intr = &usb->intr;
514 spin_lock_irqsave(&intr->lock, flags);
517 spin_unlock_irqrestore(&intr->lock, flags);
521 spin_unlock_irqrestore(&intr->lock, flags);
524 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
528 static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
532 struct zd_mac *mac = zd_usb_to_mac(usb);
533 const struct rx_length_info *length_info;
535 if (length < sizeof(struct rx_length_info)) {
536 /* It's not a complete packet anyhow. */
539 length_info = (struct rx_length_info *)
540 (buffer + length - sizeof(struct rx_length_info));
542 /* It might be that three frames are merged into a single URB
543 * transaction. We have to check for the length info tag.
545 * While testing we discovered that length_info might be unaligned,
546 * because if USB transactions are merged, the last packet will not
547 * be padded. Unaligned access might also happen if the length_info
548 * structure is not present.
550 if (get_unaligned(&length_info->tag) == RX_LENGTH_INFO_TAG) {
551 unsigned int l, k, n;
552 for (i = 0, l = 0;; i++) {
553 k = le16_to_cpu(get_unaligned(
554 &length_info->length[i]));
558 zd_mac_rx(mac, buffer+l, k);
564 zd_mac_rx(mac, buffer, length);
568 static void rx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
571 struct zd_usb_rx *rx;
575 switch (urb->status) {
586 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
590 buffer = urb->transfer_buffer;
591 length = urb->actual_length;
595 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
596 /* If there is an old first fragment, we don't care. */
597 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
598 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
599 spin_lock(&rx->lock);
600 memcpy(rx->fragment, buffer, length);
601 rx->fragment_length = length;
602 spin_unlock(&rx->lock);
606 spin_lock(&rx->lock);
607 if (rx->fragment_length > 0) {
608 /* We are on a second fragment, we believe */
609 ZD_ASSERT(length + rx->fragment_length <=
610 ARRAY_SIZE(rx->fragment));
611 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
612 memcpy(rx->fragment+rx->fragment_length, buffer, length);
613 handle_rx_packet(usb, rx->fragment,
614 rx->fragment_length + length);
615 rx->fragment_length = 0;
616 spin_unlock(&rx->lock);
618 spin_unlock(&rx->lock);
619 handle_rx_packet(usb, buffer, length);
623 usb_submit_urb(urb, GFP_ATOMIC);
626 struct urb *alloc_urb(struct zd_usb *usb)
628 struct usb_device *udev = zd_usb_to_usbdev(usb);
632 urb = usb_alloc_urb(0, GFP_NOFS);
635 buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_NOFS,
642 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
643 buffer, USB_MAX_RX_SIZE,
644 rx_urb_complete, usb);
645 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
650 void free_urb(struct urb *urb)
654 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
655 urb->transfer_buffer, urb->transfer_dma);
659 int zd_usb_enable_rx(struct zd_usb *usb)
662 struct zd_usb_rx *rx = &usb->rx;
665 dev_dbg_f(zd_usb_dev(usb), "\n");
668 urbs = kcalloc(URBS_COUNT, sizeof(struct urb *), GFP_NOFS);
671 for (i = 0; i < URBS_COUNT; i++) {
672 urbs[i] = alloc_urb(usb);
677 ZD_ASSERT(!irqs_disabled());
678 spin_lock_irq(&rx->lock);
680 spin_unlock_irq(&rx->lock);
685 rx->urbs_count = URBS_COUNT;
686 spin_unlock_irq(&rx->lock);
688 for (i = 0; i < URBS_COUNT; i++) {
689 r = usb_submit_urb(urbs[i], GFP_NOFS);
696 for (i = 0; i < URBS_COUNT; i++) {
697 usb_kill_urb(urbs[i]);
699 spin_lock_irq(&rx->lock);
702 spin_unlock_irq(&rx->lock);
705 for (i = 0; i < URBS_COUNT; i++)
711 void zd_usb_disable_rx(struct zd_usb *usb)
717 struct zd_usb_rx *rx = &usb->rx;
719 spin_lock_irqsave(&rx->lock, flags);
721 count = rx->urbs_count;
722 spin_unlock_irqrestore(&rx->lock, flags);
726 for (i = 0; i < count; i++) {
727 usb_kill_urb(urbs[i]);
732 spin_lock_irqsave(&rx->lock, flags);
735 spin_unlock_irqrestore(&rx->lock, flags);
738 static void tx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
742 switch (urb->status) {
751 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
754 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
758 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
759 urb->transfer_buffer, urb->transfer_dma);
763 r = usb_submit_urb(urb, GFP_ATOMIC);
765 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
770 /* Puts the frame on the USB endpoint. It doesn't wait for
771 * completion. The frame must contain the control set.
773 int zd_usb_tx(struct zd_usb *usb, const u8 *frame, unsigned int length)
776 struct usb_device *udev = zd_usb_to_usbdev(usb);
780 urb = usb_alloc_urb(0, GFP_ATOMIC);
786 buffer = usb_buffer_alloc(zd_usb_to_usbdev(usb), length, GFP_ATOMIC,
792 memcpy(buffer, frame, length);
794 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
795 buffer, length, tx_urb_complete, NULL);
796 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
798 r = usb_submit_urb(urb, GFP_ATOMIC);
803 usb_buffer_free(zd_usb_to_usbdev(usb), length, buffer,
811 static inline void init_usb_interrupt(struct zd_usb *usb)
813 struct zd_usb_interrupt *intr = &usb->intr;
815 spin_lock_init(&intr->lock);
816 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
817 init_completion(&intr->read_regs.completion);
818 intr->read_regs.cr_int_addr = cpu_to_le16(usb_addr(usb, CR_INTERRUPT));
821 static inline void init_usb_rx(struct zd_usb *usb)
823 struct zd_usb_rx *rx = &usb->rx;
824 spin_lock_init(&rx->lock);
825 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
826 rx->usb_packet_size = 512;
828 rx->usb_packet_size = 64;
830 ZD_ASSERT(rx->fragment_length == 0);
833 static inline void init_usb_tx(struct zd_usb *usb)
835 /* FIXME: at this point we will allocate a fixed number of urb's for
836 * use in a cyclic scheme */
839 void zd_usb_init(struct zd_usb *usb, struct net_device *netdev,
840 struct usb_interface *intf)
842 memset(usb, 0, sizeof(*usb));
843 usb->intf = usb_get_intf(intf);
844 usb_set_intfdata(usb->intf, netdev);
845 init_usb_interrupt(usb);
850 int zd_usb_init_hw(struct zd_usb *usb)
853 struct zd_chip *chip = zd_usb_to_chip(usb);
855 ZD_ASSERT(mutex_is_locked(&chip->mutex));
856 r = zd_ioread16_locked(chip, &usb->fw_base_offset,
857 USB_REG((u16)FW_BASE_ADDR_OFFSET));
860 dev_dbg_f(zd_usb_dev(usb), "fw_base_offset: %#06hx\n",
861 usb->fw_base_offset);
866 void zd_usb_clear(struct zd_usb *usb)
868 usb_set_intfdata(usb->intf, NULL);
869 usb_put_intf(usb->intf);
870 memset(usb, 0, sizeof(*usb));
871 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
874 static const char *speed(enum usb_device_speed speed)
884 return "unknown speed";
888 static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
890 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
891 le16_to_cpu(udev->descriptor.idVendor),
892 le16_to_cpu(udev->descriptor.idProduct),
897 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
899 struct usb_device *udev = interface_to_usbdev(usb->intf);
900 return scnprint_id(udev, buffer, size);
904 static void print_id(struct usb_device *udev)
908 scnprint_id(udev, buffer, sizeof(buffer));
909 buffer[sizeof(buffer)-1] = 0;
910 dev_dbg_f(&udev->dev, "%s\n", buffer);
913 #define print_id(udev) do { } while (0)
916 static int probe(struct usb_interface *intf, const struct usb_device_id *id)
919 struct usb_device *udev = interface_to_usbdev(intf);
920 struct net_device *netdev = NULL;
924 switch (udev->speed) {
930 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
935 netdev = zd_netdev_alloc(intf);
936 if (netdev == NULL) {
941 r = upload_firmware(udev, id->driver_info);
944 "couldn't load firmware. Error number %d\n", r);
948 r = usb_reset_configuration(udev);
950 dev_dbg_f(&intf->dev,
951 "couldn't reset configuration. Error number %d\n", r);
955 /* At this point the interrupt endpoint is not generally enabled. We
956 * save the USB bandwidth until the network device is opened. But
957 * notify that the initialization of the MAC will require the
958 * interrupts to be temporary enabled.
960 r = zd_mac_init_hw(zd_netdev_mac(netdev), id->driver_info);
962 dev_dbg_f(&intf->dev,
963 "couldn't initialize mac. Error number %d\n", r);
967 r = register_netdev(netdev);
969 dev_dbg_f(&intf->dev,
970 "couldn't register netdev. Error number %d\n", r);
974 dev_dbg_f(&intf->dev, "successful\n");
975 dev_info(&intf->dev,"%s\n", netdev->name);
978 usb_reset_device(interface_to_usbdev(intf));
979 zd_netdev_free(netdev);
983 static void disconnect(struct usb_interface *intf)
985 struct net_device *netdev = zd_intf_to_netdev(intf);
986 struct zd_mac *mac = zd_netdev_mac(netdev);
987 struct zd_usb *usb = &mac->chip.usb;
989 dev_dbg_f(zd_usb_dev(usb), "\n");
991 zd_netdev_disconnect(netdev);
993 /* Just in case something has gone wrong! */
994 zd_usb_disable_rx(usb);
995 zd_usb_disable_int(usb);
997 /* If the disconnect has been caused by a removal of the
998 * driver module, the reset allows reloading of the driver. If the
999 * reset will not be executed here, the upload of the firmware in the
1000 * probe function caused by the reloading of the driver will fail.
1002 usb_reset_device(interface_to_usbdev(intf));
1004 /* If somebody still waits on this lock now, this is an error. */
1005 zd_netdev_free(netdev);
1006 dev_dbg(&intf->dev, "disconnected\n");
1009 static struct usb_driver driver = {
1011 .id_table = usb_ids,
1013 .disconnect = disconnect,
1016 static int __init usb_init(void)
1020 pr_debug("usb_init()\n");
1022 r = usb_register(&driver);
1024 printk(KERN_ERR "usb_register() failed. Error number %d\n", r);
1028 pr_debug("zd1211rw initialized\n");
1032 static void __exit usb_exit(void)
1034 pr_debug("usb_exit()\n");
1035 usb_deregister(&driver);
1038 module_init(usb_init);
1039 module_exit(usb_exit);
1041 static int usb_int_regs_length(unsigned int count)
1043 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1046 static void prepare_read_regs_int(struct zd_usb *usb)
1048 struct zd_usb_interrupt *intr = &usb->intr;
1050 spin_lock(&intr->lock);
1051 intr->read_regs_enabled = 1;
1052 INIT_COMPLETION(intr->read_regs.completion);
1053 spin_unlock(&intr->lock);
1056 static int get_results(struct zd_usb *usb, u16 *values,
1057 struct usb_req_read_regs *req, unsigned int count)
1061 struct zd_usb_interrupt *intr = &usb->intr;
1062 struct read_regs_int *rr = &intr->read_regs;
1063 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1065 spin_lock(&intr->lock);
1068 /* The created block size seems to be larger than expected.
1069 * However results appear to be correct.
1071 if (rr->length < usb_int_regs_length(count)) {
1072 dev_dbg_f(zd_usb_dev(usb),
1073 "error: actual length %d less than expected %d\n",
1074 rr->length, usb_int_regs_length(count));
1077 if (rr->length > sizeof(rr->buffer)) {
1078 dev_dbg_f(zd_usb_dev(usb),
1079 "error: actual length %d exceeds buffer size %zu\n",
1080 rr->length, sizeof(rr->buffer));
1084 for (i = 0; i < count; i++) {
1085 struct reg_data *rd = ®s->regs[i];
1086 if (rd->addr != req->addr[i]) {
1087 dev_dbg_f(zd_usb_dev(usb),
1088 "rd[%d] addr %#06hx expected %#06hx\n", i,
1089 le16_to_cpu(rd->addr),
1090 le16_to_cpu(req->addr[i]));
1093 values[i] = le16_to_cpu(rd->value);
1098 spin_unlock(&intr->lock);
1102 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1103 const zd_addr_t *addresses, unsigned int count)
1106 int i, req_len, actual_req_len;
1107 struct usb_device *udev;
1108 struct usb_req_read_regs *req = NULL;
1109 unsigned long timeout;
1112 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1115 if (count > USB_MAX_IOREAD16_COUNT) {
1116 dev_dbg_f(zd_usb_dev(usb),
1117 "error: count %u exceeds possible max %u\n",
1118 count, USB_MAX_IOREAD16_COUNT);
1122 dev_dbg_f(zd_usb_dev(usb),
1123 "error: io in atomic context not supported\n");
1124 return -EWOULDBLOCK;
1126 if (!usb_int_enabled(usb)) {
1127 dev_dbg_f(zd_usb_dev(usb),
1128 "error: usb interrupt not enabled\n");
1129 return -EWOULDBLOCK;
1132 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1133 req = kmalloc(req_len, GFP_NOFS);
1136 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1137 for (i = 0; i < count; i++)
1138 req->addr[i] = cpu_to_le16(usb_addr(usb, addresses[i]));
1140 udev = zd_usb_to_usbdev(usb);
1141 prepare_read_regs_int(usb);
1142 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1143 req, req_len, &actual_req_len, 1000 /* ms */);
1145 dev_dbg_f(zd_usb_dev(usb),
1146 "error in usb_bulk_msg(). Error number %d\n", r);
1149 if (req_len != actual_req_len) {
1150 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1151 " req_len %d != actual_req_len %d\n",
1152 req_len, actual_req_len);
1157 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1158 msecs_to_jiffies(1000));
1160 disable_read_regs_int(usb);
1161 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1166 r = get_results(usb, values, req, count);
1172 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1176 struct usb_device *udev;
1177 struct usb_req_write_regs *req = NULL;
1178 int i, req_len, actual_req_len;
1182 if (count > USB_MAX_IOWRITE16_COUNT) {
1183 dev_dbg_f(zd_usb_dev(usb),
1184 "error: count %u exceeds possible max %u\n",
1185 count, USB_MAX_IOWRITE16_COUNT);
1189 dev_dbg_f(zd_usb_dev(usb),
1190 "error: io in atomic context not supported\n");
1191 return -EWOULDBLOCK;
1194 req_len = sizeof(struct usb_req_write_regs) +
1195 count * sizeof(struct reg_data);
1196 req = kmalloc(req_len, GFP_NOFS);
1200 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1201 for (i = 0; i < count; i++) {
1202 struct reg_data *rw = &req->reg_writes[i];
1203 rw->addr = cpu_to_le16(usb_addr(usb, ioreqs[i].addr));
1204 rw->value = cpu_to_le16(ioreqs[i].value);
1207 udev = zd_usb_to_usbdev(usb);
1208 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1209 req, req_len, &actual_req_len, 1000 /* ms */);
1211 dev_dbg_f(zd_usb_dev(usb),
1212 "error in usb_bulk_msg(). Error number %d\n", r);
1215 if (req_len != actual_req_len) {
1216 dev_dbg_f(zd_usb_dev(usb),
1217 "error in usb_bulk_msg()"
1218 " req_len %d != actual_req_len %d\n",
1219 req_len, actual_req_len);
1224 /* FALL-THROUGH with r == 0 */
1230 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1233 struct usb_device *udev;
1234 struct usb_req_rfwrite *req = NULL;
1235 int i, req_len, actual_req_len;
1236 u16 bit_value_template;
1239 dev_dbg_f(zd_usb_dev(usb),
1240 "error: io in atomic context not supported\n");
1241 return -EWOULDBLOCK;
1243 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1244 dev_dbg_f(zd_usb_dev(usb),
1245 "error: bits %d are smaller than"
1246 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1247 bits, USB_MIN_RFWRITE_BIT_COUNT);
1250 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1251 dev_dbg_f(zd_usb_dev(usb),
1252 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1253 bits, USB_MAX_RFWRITE_BIT_COUNT);
1257 if (value & (~0UL << bits)) {
1258 dev_dbg_f(zd_usb_dev(usb),
1259 "error: value %#09x has bits >= %d set\n",
1265 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1267 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1269 dev_dbg_f(zd_usb_dev(usb),
1270 "error %d: Couldn't read CR203\n", r);
1273 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1275 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1276 req = kmalloc(req_len, GFP_NOFS);
1280 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1281 /* 1: 3683a, but not used in ZYDAS driver */
1282 req->value = cpu_to_le16(2);
1283 req->bits = cpu_to_le16(bits);
1285 for (i = 0; i < bits; i++) {
1286 u16 bv = bit_value_template;
1287 if (value & (1 << (bits-1-i)))
1289 req->bit_values[i] = cpu_to_le16(bv);
1292 udev = zd_usb_to_usbdev(usb);
1293 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1294 req, req_len, &actual_req_len, 1000 /* ms */);
1296 dev_dbg_f(zd_usb_dev(usb),
1297 "error in usb_bulk_msg(). Error number %d\n", r);
1300 if (req_len != actual_req_len) {
1301 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1302 " req_len %d != actual_req_len %d\n",
1303 req_len, actual_req_len);
1308 /* FALL-THROUGH with r == 0 */