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 },
51 /* "Driverless" devices that need ejecting */
52 { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
56 MODULE_LICENSE("GPL");
57 MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
58 MODULE_AUTHOR("Ulrich Kunitz");
59 MODULE_AUTHOR("Daniel Drake");
60 MODULE_VERSION("1.0");
61 MODULE_DEVICE_TABLE(usb, usb_ids);
63 #define FW_ZD1211_PREFIX "zd1211/zd1211_"
64 #define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
66 /* register address handling */
69 static int check_addr(struct zd_usb *usb, zd_addr_t addr)
71 u32 base = ZD_ADDR_BASE(addr);
72 u32 offset = ZD_OFFSET(addr);
74 if ((u32)addr & ADDR_ZERO_MASK)
80 if (offset > CR_MAX_OFFSET) {
81 dev_dbg(zd_usb_dev(usb),
82 "CR offset %#010x larger than"
83 " CR_MAX_OFFSET %#10x\n",
84 offset, CR_MAX_OFFSET);
88 dev_dbg(zd_usb_dev(usb),
89 "CR offset %#010x is not a multiple of 2\n",
95 if (offset > E2P_MAX_OFFSET) {
96 dev_dbg(zd_usb_dev(usb),
97 "E2P offset %#010x larger than"
98 " E2P_MAX_OFFSET %#010x\n",
99 offset, E2P_MAX_OFFSET);
100 goto invalid_address;
104 if (!usb->fw_base_offset) {
105 dev_dbg(zd_usb_dev(usb),
106 "ERROR: fw base offset has not been set\n");
109 if (offset > FW_MAX_OFFSET) {
110 dev_dbg(zd_usb_dev(usb),
111 "FW offset %#10x is larger than"
112 " FW_MAX_OFFSET %#010x\n",
113 offset, FW_MAX_OFFSET);
114 goto invalid_address;
118 dev_dbg(zd_usb_dev(usb),
119 "address has unsupported base %#010x\n", addr);
120 goto invalid_address;
125 dev_dbg(zd_usb_dev(usb),
126 "ERROR: invalid address: %#010x\n", addr);
131 static u16 usb_addr(struct zd_usb *usb, zd_addr_t addr)
136 base = ZD_ADDR_BASE(addr);
137 offset = ZD_OFFSET(addr);
139 ZD_ASSERT(check_addr(usb, addr) == 0);
143 offset += CR_BASE_OFFSET;
146 offset += E2P_BASE_OFFSET;
149 offset += usb->fw_base_offset;
156 /* USB device initialization */
158 static int request_fw_file(
159 const struct firmware **fw, const char *name, struct device *device)
163 dev_dbg_f(device, "fw name %s\n", name);
165 r = request_firmware(fw, name, device);
168 "Could not load firmware file %s. Error number %d\n",
173 static inline u16 get_bcdDevice(const struct usb_device *udev)
175 return le16_to_cpu(udev->descriptor.bcdDevice);
178 enum upload_code_flags {
182 /* Ensures that MAX_TRANSFER_SIZE is even. */
183 #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
185 static int upload_code(struct usb_device *udev,
186 const u8 *data, size_t size, u16 code_offset, int flags)
191 /* USB request blocks need "kmalloced" buffers.
193 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
195 dev_err(&udev->dev, "out of memory\n");
202 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
203 size : MAX_TRANSFER_SIZE;
205 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
207 memcpy(p, data, transfer_size);
208 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
209 USB_REQ_FIRMWARE_DOWNLOAD,
210 USB_DIR_OUT | USB_TYPE_VENDOR,
211 code_offset, 0, p, transfer_size, 1000 /* ms */);
214 "USB control request for firmware upload"
215 " failed. Error number %d\n", r);
218 transfer_size = r & ~1;
220 size -= transfer_size;
221 data += transfer_size;
222 code_offset += transfer_size/sizeof(u16);
225 if (flags & REBOOT) {
228 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
229 USB_REQ_FIRMWARE_CONFIRM,
230 USB_DIR_IN | USB_TYPE_VENDOR,
231 0, 0, &ret, sizeof(ret), 5000 /* ms */);
232 if (r != sizeof(ret)) {
234 "control request firmeware confirmation failed."
235 " Return value %d\n", r);
242 "Internal error while downloading."
243 " Firmware confirm return value %#04x\n",
248 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
258 static u16 get_word(const void *data, u16 offset)
260 const __le16 *p = data;
261 return le16_to_cpu(p[offset]);
264 static char *get_fw_name(char *buffer, size_t size, u8 device_type,
267 scnprintf(buffer, size, "%s%s",
268 device_type == DEVICE_ZD1211B ?
269 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
274 static int handle_version_mismatch(struct usb_device *udev, u8 device_type,
275 const struct firmware *ub_fw)
277 const struct firmware *ur_fw = NULL;
282 r = request_fw_file(&ur_fw,
283 get_fw_name(fw_name, sizeof(fw_name), device_type, "ur"),
288 r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START_OFFSET,
293 offset = ((EEPROM_REGS_OFFSET + EEPROM_REGS_SIZE) * sizeof(u16));
294 r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
295 E2P_BASE_OFFSET + EEPROM_REGS_SIZE, REBOOT);
297 /* At this point, the vendor driver downloads the whole firmware
298 * image, hacks around with version IDs, and uploads it again,
299 * completely overwriting the boot code. We do not do this here as
300 * it is not required on any tested devices, and it is suspected to
303 release_firmware(ur_fw);
307 static int upload_firmware(struct usb_device *udev, u8 device_type)
312 const struct firmware *ub_fw = NULL;
313 const struct firmware *uph_fw = NULL;
316 bcdDevice = get_bcdDevice(udev);
318 r = request_fw_file(&ub_fw,
319 get_fw_name(fw_name, sizeof(fw_name), device_type, "ub"),
324 fw_bcdDevice = get_word(ub_fw->data, EEPROM_REGS_OFFSET);
326 if (fw_bcdDevice != bcdDevice) {
328 "firmware version %#06x and device bootcode version "
329 "%#06x differ\n", fw_bcdDevice, bcdDevice);
330 if (bcdDevice <= 0x4313)
331 dev_warn(&udev->dev, "device has old bootcode, please "
332 "report success or failure\n");
334 r = handle_version_mismatch(udev, device_type, ub_fw);
338 dev_dbg_f(&udev->dev,
339 "firmware device id %#06x is equal to the "
340 "actual device id\n", fw_bcdDevice);
344 r = request_fw_file(&uph_fw,
345 get_fw_name(fw_name, sizeof(fw_name), device_type, "uphr"),
350 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START_OFFSET,
354 "Could not upload firmware code uph. Error number %d\n",
360 release_firmware(ub_fw);
361 release_firmware(uph_fw);
365 static void disable_read_regs_int(struct zd_usb *usb)
367 struct zd_usb_interrupt *intr = &usb->intr;
369 spin_lock(&intr->lock);
370 intr->read_regs_enabled = 0;
371 spin_unlock(&intr->lock);
374 #define urb_dev(urb) (&(urb)->dev->dev)
376 static inline void handle_regs_int(struct urb *urb)
378 struct zd_usb *usb = urb->context;
379 struct zd_usb_interrupt *intr = &usb->intr;
382 ZD_ASSERT(in_interrupt());
383 spin_lock(&intr->lock);
385 if (intr->read_regs_enabled) {
386 intr->read_regs.length = len = urb->actual_length;
388 if (len > sizeof(intr->read_regs.buffer))
389 len = sizeof(intr->read_regs.buffer);
390 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
391 intr->read_regs_enabled = 0;
392 complete(&intr->read_regs.completion);
396 dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n");
398 spin_unlock(&intr->lock);
401 static inline void handle_retry_failed_int(struct urb *urb)
403 dev_dbg_f(urb_dev(urb), "retry failed interrupt\n");
407 static void int_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
410 struct usb_int_header *hdr;
412 switch (urb->status) {
426 if (urb->actual_length < sizeof(hdr)) {
427 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
431 hdr = urb->transfer_buffer;
432 if (hdr->type != USB_INT_TYPE) {
433 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
438 case USB_INT_ID_REGS:
439 handle_regs_int(urb);
441 case USB_INT_ID_RETRY_FAILED:
442 handle_retry_failed_int(urb);
445 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
446 (unsigned int)hdr->id);
451 r = usb_submit_urb(urb, GFP_ATOMIC);
453 dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
458 kfree(urb->transfer_buffer);
461 static inline int int_urb_interval(struct usb_device *udev)
463 switch (udev->speed) {
474 static inline int usb_int_enabled(struct zd_usb *usb)
477 struct zd_usb_interrupt *intr = &usb->intr;
480 spin_lock_irqsave(&intr->lock, flags);
482 spin_unlock_irqrestore(&intr->lock, flags);
486 int zd_usb_enable_int(struct zd_usb *usb)
489 struct usb_device *udev;
490 struct zd_usb_interrupt *intr = &usb->intr;
491 void *transfer_buffer = NULL;
494 dev_dbg_f(zd_usb_dev(usb), "\n");
496 urb = usb_alloc_urb(0, GFP_NOFS);
502 ZD_ASSERT(!irqs_disabled());
503 spin_lock_irq(&intr->lock);
505 spin_unlock_irq(&intr->lock);
510 spin_unlock_irq(&intr->lock);
512 /* TODO: make it a DMA buffer */
514 transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_NOFS);
515 if (!transfer_buffer) {
516 dev_dbg_f(zd_usb_dev(usb),
517 "couldn't allocate transfer_buffer\n");
518 goto error_set_urb_null;
521 udev = zd_usb_to_usbdev(usb);
522 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
523 transfer_buffer, USB_MAX_EP_INT_BUFFER,
524 int_urb_complete, usb,
527 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
528 r = usb_submit_urb(urb, GFP_NOFS);
530 dev_dbg_f(zd_usb_dev(usb),
531 "Couldn't submit urb. Error number %d\n", r);
537 kfree(transfer_buffer);
539 spin_lock_irq(&intr->lock);
541 spin_unlock_irq(&intr->lock);
548 void zd_usb_disable_int(struct zd_usb *usb)
551 struct zd_usb_interrupt *intr = &usb->intr;
554 spin_lock_irqsave(&intr->lock, flags);
557 spin_unlock_irqrestore(&intr->lock, flags);
561 spin_unlock_irqrestore(&intr->lock, flags);
564 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
568 static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
572 struct zd_mac *mac = zd_usb_to_mac(usb);
573 const struct rx_length_info *length_info;
575 if (length < sizeof(struct rx_length_info)) {
576 /* It's not a complete packet anyhow. */
579 length_info = (struct rx_length_info *)
580 (buffer + length - sizeof(struct rx_length_info));
582 /* It might be that three frames are merged into a single URB
583 * transaction. We have to check for the length info tag.
585 * While testing we discovered that length_info might be unaligned,
586 * because if USB transactions are merged, the last packet will not
587 * be padded. Unaligned access might also happen if the length_info
588 * structure is not present.
590 if (get_unaligned(&length_info->tag) == cpu_to_le16(RX_LENGTH_INFO_TAG))
592 unsigned int l, k, n;
593 for (i = 0, l = 0;; i++) {
594 k = le16_to_cpu(get_unaligned(&length_info->length[i]));
598 zd_mac_rx(mac, buffer+l, k);
604 zd_mac_rx(mac, buffer, length);
608 static void rx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
611 struct zd_usb_rx *rx;
615 switch (urb->status) {
626 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
630 buffer = urb->transfer_buffer;
631 length = urb->actual_length;
635 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
636 /* If there is an old first fragment, we don't care. */
637 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
638 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
639 spin_lock(&rx->lock);
640 memcpy(rx->fragment, buffer, length);
641 rx->fragment_length = length;
642 spin_unlock(&rx->lock);
646 spin_lock(&rx->lock);
647 if (rx->fragment_length > 0) {
648 /* We are on a second fragment, we believe */
649 ZD_ASSERT(length + rx->fragment_length <=
650 ARRAY_SIZE(rx->fragment));
651 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
652 memcpy(rx->fragment+rx->fragment_length, buffer, length);
653 handle_rx_packet(usb, rx->fragment,
654 rx->fragment_length + length);
655 rx->fragment_length = 0;
656 spin_unlock(&rx->lock);
658 spin_unlock(&rx->lock);
659 handle_rx_packet(usb, buffer, length);
663 usb_submit_urb(urb, GFP_ATOMIC);
666 struct urb *alloc_urb(struct zd_usb *usb)
668 struct usb_device *udev = zd_usb_to_usbdev(usb);
672 urb = usb_alloc_urb(0, GFP_NOFS);
675 buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_NOFS,
682 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
683 buffer, USB_MAX_RX_SIZE,
684 rx_urb_complete, usb);
685 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
690 void free_urb(struct urb *urb)
694 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
695 urb->transfer_buffer, urb->transfer_dma);
699 int zd_usb_enable_rx(struct zd_usb *usb)
702 struct zd_usb_rx *rx = &usb->rx;
705 dev_dbg_f(zd_usb_dev(usb), "\n");
708 urbs = kcalloc(URBS_COUNT, sizeof(struct urb *), GFP_NOFS);
711 for (i = 0; i < URBS_COUNT; i++) {
712 urbs[i] = alloc_urb(usb);
717 ZD_ASSERT(!irqs_disabled());
718 spin_lock_irq(&rx->lock);
720 spin_unlock_irq(&rx->lock);
725 rx->urbs_count = URBS_COUNT;
726 spin_unlock_irq(&rx->lock);
728 for (i = 0; i < URBS_COUNT; i++) {
729 r = usb_submit_urb(urbs[i], GFP_NOFS);
736 for (i = 0; i < URBS_COUNT; i++) {
737 usb_kill_urb(urbs[i]);
739 spin_lock_irq(&rx->lock);
742 spin_unlock_irq(&rx->lock);
745 for (i = 0; i < URBS_COUNT; i++)
751 void zd_usb_disable_rx(struct zd_usb *usb)
757 struct zd_usb_rx *rx = &usb->rx;
759 spin_lock_irqsave(&rx->lock, flags);
761 count = rx->urbs_count;
762 spin_unlock_irqrestore(&rx->lock, flags);
766 for (i = 0; i < count; i++) {
767 usb_kill_urb(urbs[i]);
772 spin_lock_irqsave(&rx->lock, flags);
775 spin_unlock_irqrestore(&rx->lock, flags);
778 static void tx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
782 switch (urb->status) {
791 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
794 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
798 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
799 urb->transfer_buffer, urb->transfer_dma);
803 r = usb_submit_urb(urb, GFP_ATOMIC);
805 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
810 /* Puts the frame on the USB endpoint. It doesn't wait for
811 * completion. The frame must contain the control set.
813 int zd_usb_tx(struct zd_usb *usb, const u8 *frame, unsigned int length)
816 struct usb_device *udev = zd_usb_to_usbdev(usb);
820 urb = usb_alloc_urb(0, GFP_ATOMIC);
826 buffer = usb_buffer_alloc(zd_usb_to_usbdev(usb), length, GFP_ATOMIC,
832 memcpy(buffer, frame, length);
834 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
835 buffer, length, tx_urb_complete, NULL);
836 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
838 r = usb_submit_urb(urb, GFP_ATOMIC);
843 usb_buffer_free(zd_usb_to_usbdev(usb), length, buffer,
851 static inline void init_usb_interrupt(struct zd_usb *usb)
853 struct zd_usb_interrupt *intr = &usb->intr;
855 spin_lock_init(&intr->lock);
856 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
857 init_completion(&intr->read_regs.completion);
858 intr->read_regs.cr_int_addr = cpu_to_le16(usb_addr(usb, CR_INTERRUPT));
861 static inline void init_usb_rx(struct zd_usb *usb)
863 struct zd_usb_rx *rx = &usb->rx;
864 spin_lock_init(&rx->lock);
865 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
866 rx->usb_packet_size = 512;
868 rx->usb_packet_size = 64;
870 ZD_ASSERT(rx->fragment_length == 0);
873 static inline void init_usb_tx(struct zd_usb *usb)
875 /* FIXME: at this point we will allocate a fixed number of urb's for
876 * use in a cyclic scheme */
879 void zd_usb_init(struct zd_usb *usb, struct net_device *netdev,
880 struct usb_interface *intf)
882 memset(usb, 0, sizeof(*usb));
883 usb->intf = usb_get_intf(intf);
884 usb_set_intfdata(usb->intf, netdev);
885 init_usb_interrupt(usb);
890 int zd_usb_init_hw(struct zd_usb *usb)
893 struct zd_chip *chip = zd_usb_to_chip(usb);
895 ZD_ASSERT(mutex_is_locked(&chip->mutex));
896 r = zd_ioread16_locked(chip, &usb->fw_base_offset,
897 USB_REG((u16)FW_BASE_ADDR_OFFSET));
900 dev_dbg_f(zd_usb_dev(usb), "fw_base_offset: %#06hx\n",
901 usb->fw_base_offset);
906 void zd_usb_clear(struct zd_usb *usb)
908 usb_set_intfdata(usb->intf, NULL);
909 usb_put_intf(usb->intf);
910 memset(usb, 0, sizeof(*usb));
911 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
914 static const char *speed(enum usb_device_speed speed)
924 return "unknown speed";
928 static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
930 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
931 le16_to_cpu(udev->descriptor.idVendor),
932 le16_to_cpu(udev->descriptor.idProduct),
937 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
939 struct usb_device *udev = interface_to_usbdev(usb->intf);
940 return scnprint_id(udev, buffer, size);
944 static void print_id(struct usb_device *udev)
948 scnprint_id(udev, buffer, sizeof(buffer));
949 buffer[sizeof(buffer)-1] = 0;
950 dev_dbg_f(&udev->dev, "%s\n", buffer);
953 #define print_id(udev) do { } while (0)
956 static int eject_installer(struct usb_interface *intf)
958 struct usb_device *udev = interface_to_usbdev(intf);
959 struct usb_host_interface *iface_desc = &intf->altsetting[0];
960 struct usb_endpoint_descriptor *endpoint;
965 /* Find bulk out endpoint */
966 endpoint = &iface_desc->endpoint[1].desc;
967 if ((endpoint->bEndpointAddress & USB_TYPE_MASK) == USB_DIR_OUT &&
968 (endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
969 USB_ENDPOINT_XFER_BULK) {
970 bulk_out_ep = endpoint->bEndpointAddress;
973 "zd1211rw: Could not find bulk out endpoint\n");
977 cmd = kzalloc(31, GFP_KERNEL);
981 /* USB bulk command block */
982 cmd[0] = 0x55; /* bulk command signature */
983 cmd[1] = 0x53; /* bulk command signature */
984 cmd[2] = 0x42; /* bulk command signature */
985 cmd[3] = 0x43; /* bulk command signature */
986 cmd[14] = 6; /* command length */
988 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
989 cmd[19] = 0x2; /* eject disc */
991 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
992 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
993 cmd, 31, NULL, 2000);
998 /* At this point, the device disconnects and reconnects with the real
1001 usb_set_intfdata(intf, NULL);
1005 static int probe(struct usb_interface *intf, const struct usb_device_id *id)
1008 struct usb_device *udev = interface_to_usbdev(intf);
1009 struct net_device *netdev = NULL;
1013 if (id->driver_info & DEVICE_INSTALLER)
1014 return eject_installer(intf);
1016 switch (udev->speed) {
1018 case USB_SPEED_FULL:
1019 case USB_SPEED_HIGH:
1022 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
1027 netdev = zd_netdev_alloc(intf);
1028 if (netdev == NULL) {
1033 r = upload_firmware(udev, id->driver_info);
1036 "couldn't load firmware. Error number %d\n", r);
1040 r = usb_reset_configuration(udev);
1042 dev_dbg_f(&intf->dev,
1043 "couldn't reset configuration. Error number %d\n", r);
1047 /* At this point the interrupt endpoint is not generally enabled. We
1048 * save the USB bandwidth until the network device is opened. But
1049 * notify that the initialization of the MAC will require the
1050 * interrupts to be temporary enabled.
1052 r = zd_mac_init_hw(zd_netdev_mac(netdev), id->driver_info);
1054 dev_dbg_f(&intf->dev,
1055 "couldn't initialize mac. Error number %d\n", r);
1059 r = register_netdev(netdev);
1061 dev_dbg_f(&intf->dev,
1062 "couldn't register netdev. Error number %d\n", r);
1066 dev_dbg_f(&intf->dev, "successful\n");
1067 dev_info(&intf->dev,"%s\n", netdev->name);
1070 usb_reset_device(interface_to_usbdev(intf));
1071 zd_netdev_free(netdev);
1075 static void disconnect(struct usb_interface *intf)
1077 struct net_device *netdev = zd_intf_to_netdev(intf);
1078 struct zd_mac *mac = zd_netdev_mac(netdev);
1079 struct zd_usb *usb = &mac->chip.usb;
1081 /* Either something really bad happened, or we're just dealing with
1082 * a DEVICE_INSTALLER. */
1086 dev_dbg_f(zd_usb_dev(usb), "\n");
1088 zd_netdev_disconnect(netdev);
1090 /* Just in case something has gone wrong! */
1091 zd_usb_disable_rx(usb);
1092 zd_usb_disable_int(usb);
1094 /* If the disconnect has been caused by a removal of the
1095 * driver module, the reset allows reloading of the driver. If the
1096 * reset will not be executed here, the upload of the firmware in the
1097 * probe function caused by the reloading of the driver will fail.
1099 usb_reset_device(interface_to_usbdev(intf));
1101 /* If somebody still waits on this lock now, this is an error. */
1102 zd_netdev_free(netdev);
1103 dev_dbg(&intf->dev, "disconnected\n");
1106 static struct usb_driver driver = {
1108 .id_table = usb_ids,
1110 .disconnect = disconnect,
1113 static int __init usb_init(void)
1117 pr_debug("usb_init()\n");
1119 r = usb_register(&driver);
1121 printk(KERN_ERR "usb_register() failed. Error number %d\n", r);
1125 pr_debug("zd1211rw initialized\n");
1129 static void __exit usb_exit(void)
1131 pr_debug("usb_exit()\n");
1132 usb_deregister(&driver);
1135 module_init(usb_init);
1136 module_exit(usb_exit);
1138 static int usb_int_regs_length(unsigned int count)
1140 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1143 static void prepare_read_regs_int(struct zd_usb *usb)
1145 struct zd_usb_interrupt *intr = &usb->intr;
1147 spin_lock(&intr->lock);
1148 intr->read_regs_enabled = 1;
1149 INIT_COMPLETION(intr->read_regs.completion);
1150 spin_unlock(&intr->lock);
1153 static int get_results(struct zd_usb *usb, u16 *values,
1154 struct usb_req_read_regs *req, unsigned int count)
1158 struct zd_usb_interrupt *intr = &usb->intr;
1159 struct read_regs_int *rr = &intr->read_regs;
1160 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1162 spin_lock(&intr->lock);
1165 /* The created block size seems to be larger than expected.
1166 * However results appear to be correct.
1168 if (rr->length < usb_int_regs_length(count)) {
1169 dev_dbg_f(zd_usb_dev(usb),
1170 "error: actual length %d less than expected %d\n",
1171 rr->length, usb_int_regs_length(count));
1174 if (rr->length > sizeof(rr->buffer)) {
1175 dev_dbg_f(zd_usb_dev(usb),
1176 "error: actual length %d exceeds buffer size %zu\n",
1177 rr->length, sizeof(rr->buffer));
1181 for (i = 0; i < count; i++) {
1182 struct reg_data *rd = ®s->regs[i];
1183 if (rd->addr != req->addr[i]) {
1184 dev_dbg_f(zd_usb_dev(usb),
1185 "rd[%d] addr %#06hx expected %#06hx\n", i,
1186 le16_to_cpu(rd->addr),
1187 le16_to_cpu(req->addr[i]));
1190 values[i] = le16_to_cpu(rd->value);
1195 spin_unlock(&intr->lock);
1199 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1200 const zd_addr_t *addresses, unsigned int count)
1203 int i, req_len, actual_req_len;
1204 struct usb_device *udev;
1205 struct usb_req_read_regs *req = NULL;
1206 unsigned long timeout;
1209 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1212 if (count > USB_MAX_IOREAD16_COUNT) {
1213 dev_dbg_f(zd_usb_dev(usb),
1214 "error: count %u exceeds possible max %u\n",
1215 count, USB_MAX_IOREAD16_COUNT);
1219 dev_dbg_f(zd_usb_dev(usb),
1220 "error: io in atomic context not supported\n");
1221 return -EWOULDBLOCK;
1223 if (!usb_int_enabled(usb)) {
1224 dev_dbg_f(zd_usb_dev(usb),
1225 "error: usb interrupt not enabled\n");
1226 return -EWOULDBLOCK;
1229 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1230 req = kmalloc(req_len, GFP_NOFS);
1233 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1234 for (i = 0; i < count; i++)
1235 req->addr[i] = cpu_to_le16(usb_addr(usb, addresses[i]));
1237 udev = zd_usb_to_usbdev(usb);
1238 prepare_read_regs_int(usb);
1239 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1240 req, req_len, &actual_req_len, 1000 /* ms */);
1242 dev_dbg_f(zd_usb_dev(usb),
1243 "error in usb_bulk_msg(). Error number %d\n", r);
1246 if (req_len != actual_req_len) {
1247 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1248 " req_len %d != actual_req_len %d\n",
1249 req_len, actual_req_len);
1254 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1255 msecs_to_jiffies(1000));
1257 disable_read_regs_int(usb);
1258 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1263 r = get_results(usb, values, req, count);
1269 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1273 struct usb_device *udev;
1274 struct usb_req_write_regs *req = NULL;
1275 int i, req_len, actual_req_len;
1279 if (count > USB_MAX_IOWRITE16_COUNT) {
1280 dev_dbg_f(zd_usb_dev(usb),
1281 "error: count %u exceeds possible max %u\n",
1282 count, USB_MAX_IOWRITE16_COUNT);
1286 dev_dbg_f(zd_usb_dev(usb),
1287 "error: io in atomic context not supported\n");
1288 return -EWOULDBLOCK;
1291 req_len = sizeof(struct usb_req_write_regs) +
1292 count * sizeof(struct reg_data);
1293 req = kmalloc(req_len, GFP_NOFS);
1297 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1298 for (i = 0; i < count; i++) {
1299 struct reg_data *rw = &req->reg_writes[i];
1300 rw->addr = cpu_to_le16(usb_addr(usb, ioreqs[i].addr));
1301 rw->value = cpu_to_le16(ioreqs[i].value);
1304 udev = zd_usb_to_usbdev(usb);
1305 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1306 req, req_len, &actual_req_len, 1000 /* ms */);
1308 dev_dbg_f(zd_usb_dev(usb),
1309 "error in usb_bulk_msg(). Error number %d\n", r);
1312 if (req_len != actual_req_len) {
1313 dev_dbg_f(zd_usb_dev(usb),
1314 "error in usb_bulk_msg()"
1315 " req_len %d != actual_req_len %d\n",
1316 req_len, actual_req_len);
1321 /* FALL-THROUGH with r == 0 */
1327 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1330 struct usb_device *udev;
1331 struct usb_req_rfwrite *req = NULL;
1332 int i, req_len, actual_req_len;
1333 u16 bit_value_template;
1336 dev_dbg_f(zd_usb_dev(usb),
1337 "error: io in atomic context not supported\n");
1338 return -EWOULDBLOCK;
1340 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1341 dev_dbg_f(zd_usb_dev(usb),
1342 "error: bits %d are smaller than"
1343 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1344 bits, USB_MIN_RFWRITE_BIT_COUNT);
1347 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1348 dev_dbg_f(zd_usb_dev(usb),
1349 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1350 bits, USB_MAX_RFWRITE_BIT_COUNT);
1354 if (value & (~0UL << bits)) {
1355 dev_dbg_f(zd_usb_dev(usb),
1356 "error: value %#09x has bits >= %d set\n",
1362 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1364 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1366 dev_dbg_f(zd_usb_dev(usb),
1367 "error %d: Couldn't read CR203\n", r);
1370 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1372 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1373 req = kmalloc(req_len, GFP_NOFS);
1377 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1378 /* 1: 3683a, but not used in ZYDAS driver */
1379 req->value = cpu_to_le16(2);
1380 req->bits = cpu_to_le16(bits);
1382 for (i = 0; i < bits; i++) {
1383 u16 bv = bit_value_template;
1384 if (value & (1 << (bits-1-i)))
1386 req->bit_values[i] = cpu_to_le16(bv);
1389 udev = zd_usb_to_usbdev(usb);
1390 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1391 req, req_len, &actual_req_len, 1000 /* ms */);
1393 dev_dbg_f(zd_usb_dev(usb),
1394 "error in usb_bulk_msg(). Error number %d\n", r);
1397 if (req_len != actual_req_len) {
1398 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1399 " req_len %d != actual_req_len %d\n",
1400 req_len, actual_req_len);
1405 /* FALL-THROUGH with r == 0 */