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 },
47 { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 },
49 { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
50 { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
51 { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
52 { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
53 /* "Driverless" devices that need ejecting */
54 { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
58 MODULE_LICENSE("GPL");
59 MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
60 MODULE_AUTHOR("Ulrich Kunitz");
61 MODULE_AUTHOR("Daniel Drake");
62 MODULE_VERSION("1.0");
63 MODULE_DEVICE_TABLE(usb, usb_ids);
65 #define FW_ZD1211_PREFIX "zd1211/zd1211_"
66 #define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
68 /* register address handling */
71 static int check_addr(struct zd_usb *usb, zd_addr_t addr)
73 u32 base = ZD_ADDR_BASE(addr);
74 u32 offset = ZD_OFFSET(addr);
76 if ((u32)addr & ADDR_ZERO_MASK)
82 if (offset > CR_MAX_OFFSET) {
83 dev_dbg(zd_usb_dev(usb),
84 "CR offset %#010x larger than"
85 " CR_MAX_OFFSET %#10x\n",
86 offset, CR_MAX_OFFSET);
90 dev_dbg(zd_usb_dev(usb),
91 "CR offset %#010x is not a multiple of 2\n",
97 if (offset > E2P_MAX_OFFSET) {
98 dev_dbg(zd_usb_dev(usb),
99 "E2P offset %#010x larger than"
100 " E2P_MAX_OFFSET %#010x\n",
101 offset, E2P_MAX_OFFSET);
102 goto invalid_address;
106 if (!usb->fw_base_offset) {
107 dev_dbg(zd_usb_dev(usb),
108 "ERROR: fw base offset has not been set\n");
111 if (offset > FW_MAX_OFFSET) {
112 dev_dbg(zd_usb_dev(usb),
113 "FW offset %#10x is larger than"
114 " FW_MAX_OFFSET %#010x\n",
115 offset, FW_MAX_OFFSET);
116 goto invalid_address;
120 dev_dbg(zd_usb_dev(usb),
121 "address has unsupported base %#010x\n", addr);
122 goto invalid_address;
127 dev_dbg(zd_usb_dev(usb),
128 "ERROR: invalid address: %#010x\n", addr);
133 static u16 usb_addr(struct zd_usb *usb, zd_addr_t addr)
138 base = ZD_ADDR_BASE(addr);
139 offset = ZD_OFFSET(addr);
141 ZD_ASSERT(check_addr(usb, addr) == 0);
145 offset += CR_BASE_OFFSET;
148 offset += E2P_BASE_OFFSET;
151 offset += usb->fw_base_offset;
158 /* USB device initialization */
160 static int request_fw_file(
161 const struct firmware **fw, const char *name, struct device *device)
165 dev_dbg_f(device, "fw name %s\n", name);
167 r = request_firmware(fw, name, device);
170 "Could not load firmware file %s. Error number %d\n",
175 static inline u16 get_bcdDevice(const struct usb_device *udev)
177 return le16_to_cpu(udev->descriptor.bcdDevice);
180 enum upload_code_flags {
184 /* Ensures that MAX_TRANSFER_SIZE is even. */
185 #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
187 static int upload_code(struct usb_device *udev,
188 const u8 *data, size_t size, u16 code_offset, int flags)
193 /* USB request blocks need "kmalloced" buffers.
195 p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
197 dev_err(&udev->dev, "out of memory\n");
204 size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
205 size : MAX_TRANSFER_SIZE;
207 dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
209 memcpy(p, data, transfer_size);
210 r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
211 USB_REQ_FIRMWARE_DOWNLOAD,
212 USB_DIR_OUT | USB_TYPE_VENDOR,
213 code_offset, 0, p, transfer_size, 1000 /* ms */);
216 "USB control request for firmware upload"
217 " failed. Error number %d\n", r);
220 transfer_size = r & ~1;
222 size -= transfer_size;
223 data += transfer_size;
224 code_offset += transfer_size/sizeof(u16);
227 if (flags & REBOOT) {
230 r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
231 USB_REQ_FIRMWARE_CONFIRM,
232 USB_DIR_IN | USB_TYPE_VENDOR,
233 0, 0, &ret, sizeof(ret), 5000 /* ms */);
234 if (r != sizeof(ret)) {
236 "control request firmeware confirmation failed."
237 " Return value %d\n", r);
244 "Internal error while downloading."
245 " Firmware confirm return value %#04x\n",
250 dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
260 static u16 get_word(const void *data, u16 offset)
262 const __le16 *p = data;
263 return le16_to_cpu(p[offset]);
266 static char *get_fw_name(char *buffer, size_t size, u8 device_type,
269 scnprintf(buffer, size, "%s%s",
270 device_type == DEVICE_ZD1211B ?
271 FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
276 static int handle_version_mismatch(struct usb_device *udev, u8 device_type,
277 const struct firmware *ub_fw)
279 const struct firmware *ur_fw = NULL;
284 r = request_fw_file(&ur_fw,
285 get_fw_name(fw_name, sizeof(fw_name), device_type, "ur"),
290 r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START_OFFSET,
295 offset = ((EEPROM_REGS_OFFSET + EEPROM_REGS_SIZE) * sizeof(u16));
296 r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
297 E2P_BASE_OFFSET + EEPROM_REGS_SIZE, REBOOT);
299 /* At this point, the vendor driver downloads the whole firmware
300 * image, hacks around with version IDs, and uploads it again,
301 * completely overwriting the boot code. We do not do this here as
302 * it is not required on any tested devices, and it is suspected to
305 release_firmware(ur_fw);
309 static int upload_firmware(struct usb_device *udev, u8 device_type)
314 const struct firmware *ub_fw = NULL;
315 const struct firmware *uph_fw = NULL;
318 bcdDevice = get_bcdDevice(udev);
320 r = request_fw_file(&ub_fw,
321 get_fw_name(fw_name, sizeof(fw_name), device_type, "ub"),
326 fw_bcdDevice = get_word(ub_fw->data, EEPROM_REGS_OFFSET);
328 if (fw_bcdDevice != bcdDevice) {
330 "firmware version %#06x and device bootcode version "
331 "%#06x differ\n", fw_bcdDevice, bcdDevice);
332 if (bcdDevice <= 0x4313)
333 dev_warn(&udev->dev, "device has old bootcode, please "
334 "report success or failure\n");
336 r = handle_version_mismatch(udev, device_type, ub_fw);
340 dev_dbg_f(&udev->dev,
341 "firmware device id %#06x is equal to the "
342 "actual device id\n", fw_bcdDevice);
346 r = request_fw_file(&uph_fw,
347 get_fw_name(fw_name, sizeof(fw_name), device_type, "uphr"),
352 r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START_OFFSET,
356 "Could not upload firmware code uph. Error number %d\n",
362 release_firmware(ub_fw);
363 release_firmware(uph_fw);
367 static void disable_read_regs_int(struct zd_usb *usb)
369 struct zd_usb_interrupt *intr = &usb->intr;
371 spin_lock(&intr->lock);
372 intr->read_regs_enabled = 0;
373 spin_unlock(&intr->lock);
376 #define urb_dev(urb) (&(urb)->dev->dev)
378 static inline void handle_regs_int(struct urb *urb)
380 struct zd_usb *usb = urb->context;
381 struct zd_usb_interrupt *intr = &usb->intr;
384 ZD_ASSERT(in_interrupt());
385 spin_lock(&intr->lock);
387 if (intr->read_regs_enabled) {
388 intr->read_regs.length = len = urb->actual_length;
390 if (len > sizeof(intr->read_regs.buffer))
391 len = sizeof(intr->read_regs.buffer);
392 memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
393 intr->read_regs_enabled = 0;
394 complete(&intr->read_regs.completion);
398 dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n");
400 spin_unlock(&intr->lock);
403 static inline void handle_retry_failed_int(struct urb *urb)
405 dev_dbg_f(urb_dev(urb), "retry failed interrupt\n");
409 static void int_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
412 struct usb_int_header *hdr;
414 switch (urb->status) {
428 if (urb->actual_length < sizeof(hdr)) {
429 dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
433 hdr = urb->transfer_buffer;
434 if (hdr->type != USB_INT_TYPE) {
435 dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
440 case USB_INT_ID_REGS:
441 handle_regs_int(urb);
443 case USB_INT_ID_RETRY_FAILED:
444 handle_retry_failed_int(urb);
447 dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
448 (unsigned int)hdr->id);
453 r = usb_submit_urb(urb, GFP_ATOMIC);
455 dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
460 kfree(urb->transfer_buffer);
463 static inline int int_urb_interval(struct usb_device *udev)
465 switch (udev->speed) {
476 static inline int usb_int_enabled(struct zd_usb *usb)
479 struct zd_usb_interrupt *intr = &usb->intr;
482 spin_lock_irqsave(&intr->lock, flags);
484 spin_unlock_irqrestore(&intr->lock, flags);
488 int zd_usb_enable_int(struct zd_usb *usb)
491 struct usb_device *udev;
492 struct zd_usb_interrupt *intr = &usb->intr;
493 void *transfer_buffer = NULL;
496 dev_dbg_f(zd_usb_dev(usb), "\n");
498 urb = usb_alloc_urb(0, GFP_NOFS);
504 ZD_ASSERT(!irqs_disabled());
505 spin_lock_irq(&intr->lock);
507 spin_unlock_irq(&intr->lock);
512 spin_unlock_irq(&intr->lock);
514 /* TODO: make it a DMA buffer */
516 transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_NOFS);
517 if (!transfer_buffer) {
518 dev_dbg_f(zd_usb_dev(usb),
519 "couldn't allocate transfer_buffer\n");
520 goto error_set_urb_null;
523 udev = zd_usb_to_usbdev(usb);
524 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
525 transfer_buffer, USB_MAX_EP_INT_BUFFER,
526 int_urb_complete, usb,
529 dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
530 r = usb_submit_urb(urb, GFP_NOFS);
532 dev_dbg_f(zd_usb_dev(usb),
533 "Couldn't submit urb. Error number %d\n", r);
539 kfree(transfer_buffer);
541 spin_lock_irq(&intr->lock);
543 spin_unlock_irq(&intr->lock);
550 void zd_usb_disable_int(struct zd_usb *usb)
553 struct zd_usb_interrupt *intr = &usb->intr;
556 spin_lock_irqsave(&intr->lock, flags);
559 spin_unlock_irqrestore(&intr->lock, flags);
563 spin_unlock_irqrestore(&intr->lock, flags);
566 dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
570 static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
574 struct zd_mac *mac = zd_usb_to_mac(usb);
575 const struct rx_length_info *length_info;
577 if (length < sizeof(struct rx_length_info)) {
578 /* It's not a complete packet anyhow. */
581 length_info = (struct rx_length_info *)
582 (buffer + length - sizeof(struct rx_length_info));
584 /* It might be that three frames are merged into a single URB
585 * transaction. We have to check for the length info tag.
587 * While testing we discovered that length_info might be unaligned,
588 * because if USB transactions are merged, the last packet will not
589 * be padded. Unaligned access might also happen if the length_info
590 * structure is not present.
592 if (get_unaligned(&length_info->tag) == cpu_to_le16(RX_LENGTH_INFO_TAG))
594 unsigned int l, k, n;
595 for (i = 0, l = 0;; i++) {
596 k = le16_to_cpu(get_unaligned(&length_info->length[i]));
600 zd_mac_rx(mac, buffer+l, k);
606 zd_mac_rx(mac, buffer, length);
610 static void rx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
613 struct zd_usb_rx *rx;
617 switch (urb->status) {
628 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
632 buffer = urb->transfer_buffer;
633 length = urb->actual_length;
637 if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
638 /* If there is an old first fragment, we don't care. */
639 dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
640 ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment));
641 spin_lock(&rx->lock);
642 memcpy(rx->fragment, buffer, length);
643 rx->fragment_length = length;
644 spin_unlock(&rx->lock);
648 spin_lock(&rx->lock);
649 if (rx->fragment_length > 0) {
650 /* We are on a second fragment, we believe */
651 ZD_ASSERT(length + rx->fragment_length <=
652 ARRAY_SIZE(rx->fragment));
653 dev_dbg_f(urb_dev(urb), "*** second fragment ***\n");
654 memcpy(rx->fragment+rx->fragment_length, buffer, length);
655 handle_rx_packet(usb, rx->fragment,
656 rx->fragment_length + length);
657 rx->fragment_length = 0;
658 spin_unlock(&rx->lock);
660 spin_unlock(&rx->lock);
661 handle_rx_packet(usb, buffer, length);
665 usb_submit_urb(urb, GFP_ATOMIC);
668 static struct urb *alloc_urb(struct zd_usb *usb)
670 struct usb_device *udev = zd_usb_to_usbdev(usb);
674 urb = usb_alloc_urb(0, GFP_NOFS);
677 buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_NOFS,
684 usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN),
685 buffer, USB_MAX_RX_SIZE,
686 rx_urb_complete, usb);
687 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
692 static void free_urb(struct urb *urb)
696 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
697 urb->transfer_buffer, urb->transfer_dma);
701 int zd_usb_enable_rx(struct zd_usb *usb)
704 struct zd_usb_rx *rx = &usb->rx;
707 dev_dbg_f(zd_usb_dev(usb), "\n");
710 urbs = kcalloc(URBS_COUNT, sizeof(struct urb *), GFP_NOFS);
713 for (i = 0; i < URBS_COUNT; i++) {
714 urbs[i] = alloc_urb(usb);
719 ZD_ASSERT(!irqs_disabled());
720 spin_lock_irq(&rx->lock);
722 spin_unlock_irq(&rx->lock);
727 rx->urbs_count = URBS_COUNT;
728 spin_unlock_irq(&rx->lock);
730 for (i = 0; i < URBS_COUNT; i++) {
731 r = usb_submit_urb(urbs[i], GFP_NOFS);
738 for (i = 0; i < URBS_COUNT; i++) {
739 usb_kill_urb(urbs[i]);
741 spin_lock_irq(&rx->lock);
744 spin_unlock_irq(&rx->lock);
747 for (i = 0; i < URBS_COUNT; i++)
753 void zd_usb_disable_rx(struct zd_usb *usb)
759 struct zd_usb_rx *rx = &usb->rx;
761 spin_lock_irqsave(&rx->lock, flags);
763 count = rx->urbs_count;
764 spin_unlock_irqrestore(&rx->lock, flags);
768 for (i = 0; i < count; i++) {
769 usb_kill_urb(urbs[i]);
774 spin_lock_irqsave(&rx->lock, flags);
777 spin_unlock_irqrestore(&rx->lock, flags);
780 static void tx_urb_complete(struct urb *urb, struct pt_regs *pt_regs)
784 switch (urb->status) {
793 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
796 dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
800 usb_buffer_free(urb->dev, urb->transfer_buffer_length,
801 urb->transfer_buffer, urb->transfer_dma);
805 r = usb_submit_urb(urb, GFP_ATOMIC);
807 dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
812 /* Puts the frame on the USB endpoint. It doesn't wait for
813 * completion. The frame must contain the control set.
815 int zd_usb_tx(struct zd_usb *usb, const u8 *frame, unsigned int length)
818 struct usb_device *udev = zd_usb_to_usbdev(usb);
822 urb = usb_alloc_urb(0, GFP_ATOMIC);
828 buffer = usb_buffer_alloc(zd_usb_to_usbdev(usb), length, GFP_ATOMIC,
834 memcpy(buffer, frame, length);
836 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
837 buffer, length, tx_urb_complete, NULL);
838 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
840 r = usb_submit_urb(urb, GFP_ATOMIC);
845 usb_buffer_free(zd_usb_to_usbdev(usb), length, buffer,
853 static inline void init_usb_interrupt(struct zd_usb *usb)
855 struct zd_usb_interrupt *intr = &usb->intr;
857 spin_lock_init(&intr->lock);
858 intr->interval = int_urb_interval(zd_usb_to_usbdev(usb));
859 init_completion(&intr->read_regs.completion);
860 intr->read_regs.cr_int_addr = cpu_to_le16(usb_addr(usb, CR_INTERRUPT));
863 static inline void init_usb_rx(struct zd_usb *usb)
865 struct zd_usb_rx *rx = &usb->rx;
866 spin_lock_init(&rx->lock);
867 if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
868 rx->usb_packet_size = 512;
870 rx->usb_packet_size = 64;
872 ZD_ASSERT(rx->fragment_length == 0);
875 static inline void init_usb_tx(struct zd_usb *usb)
877 /* FIXME: at this point we will allocate a fixed number of urb's for
878 * use in a cyclic scheme */
881 void zd_usb_init(struct zd_usb *usb, struct net_device *netdev,
882 struct usb_interface *intf)
884 memset(usb, 0, sizeof(*usb));
885 usb->intf = usb_get_intf(intf);
886 usb_set_intfdata(usb->intf, netdev);
887 init_usb_interrupt(usb);
892 int zd_usb_init_hw(struct zd_usb *usb)
895 struct zd_chip *chip = zd_usb_to_chip(usb);
897 ZD_ASSERT(mutex_is_locked(&chip->mutex));
898 r = zd_ioread16_locked(chip, &usb->fw_base_offset,
899 USB_REG((u16)FW_BASE_ADDR_OFFSET));
902 dev_dbg_f(zd_usb_dev(usb), "fw_base_offset: %#06hx\n",
903 usb->fw_base_offset);
908 void zd_usb_clear(struct zd_usb *usb)
910 usb_set_intfdata(usb->intf, NULL);
911 usb_put_intf(usb->intf);
912 ZD_MEMCLEAR(usb, sizeof(*usb));
913 /* FIXME: usb_interrupt, usb_tx, usb_rx? */
916 static const char *speed(enum usb_device_speed speed)
926 return "unknown speed";
930 static int scnprint_id(struct usb_device *udev, char *buffer, size_t size)
932 return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s",
933 le16_to_cpu(udev->descriptor.idVendor),
934 le16_to_cpu(udev->descriptor.idProduct),
939 int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size)
941 struct usb_device *udev = interface_to_usbdev(usb->intf);
942 return scnprint_id(udev, buffer, size);
946 static void print_id(struct usb_device *udev)
950 scnprint_id(udev, buffer, sizeof(buffer));
951 buffer[sizeof(buffer)-1] = 0;
952 dev_dbg_f(&udev->dev, "%s\n", buffer);
955 #define print_id(udev) do { } while (0)
958 static int eject_installer(struct usb_interface *intf)
960 struct usb_device *udev = interface_to_usbdev(intf);
961 struct usb_host_interface *iface_desc = &intf->altsetting[0];
962 struct usb_endpoint_descriptor *endpoint;
967 /* Find bulk out endpoint */
968 endpoint = &iface_desc->endpoint[1].desc;
969 if ((endpoint->bEndpointAddress & USB_TYPE_MASK) == USB_DIR_OUT &&
970 (endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
971 USB_ENDPOINT_XFER_BULK) {
972 bulk_out_ep = endpoint->bEndpointAddress;
975 "zd1211rw: Could not find bulk out endpoint\n");
979 cmd = kzalloc(31, GFP_KERNEL);
983 /* USB bulk command block */
984 cmd[0] = 0x55; /* bulk command signature */
985 cmd[1] = 0x53; /* bulk command signature */
986 cmd[2] = 0x42; /* bulk command signature */
987 cmd[3] = 0x43; /* bulk command signature */
988 cmd[14] = 6; /* command length */
990 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
991 cmd[19] = 0x2; /* eject disc */
993 dev_info(&udev->dev, "Ejecting virtual installer media...\n");
994 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
995 cmd, 31, NULL, 2000);
1000 /* At this point, the device disconnects and reconnects with the real
1003 usb_set_intfdata(intf, NULL);
1007 static int probe(struct usb_interface *intf, const struct usb_device_id *id)
1010 struct usb_device *udev = interface_to_usbdev(intf);
1011 struct net_device *netdev = NULL;
1015 if (id->driver_info & DEVICE_INSTALLER)
1016 return eject_installer(intf);
1018 switch (udev->speed) {
1020 case USB_SPEED_FULL:
1021 case USB_SPEED_HIGH:
1024 dev_dbg_f(&intf->dev, "Unknown USB speed\n");
1029 netdev = zd_netdev_alloc(intf);
1030 if (netdev == NULL) {
1035 r = upload_firmware(udev, id->driver_info);
1038 "couldn't load firmware. Error number %d\n", r);
1042 r = usb_reset_configuration(udev);
1044 dev_dbg_f(&intf->dev,
1045 "couldn't reset configuration. Error number %d\n", r);
1049 /* At this point the interrupt endpoint is not generally enabled. We
1050 * save the USB bandwidth until the network device is opened. But
1051 * notify that the initialization of the MAC will require the
1052 * interrupts to be temporary enabled.
1054 r = zd_mac_init_hw(zd_netdev_mac(netdev), id->driver_info);
1056 dev_dbg_f(&intf->dev,
1057 "couldn't initialize mac. Error number %d\n", r);
1061 r = register_netdev(netdev);
1063 dev_dbg_f(&intf->dev,
1064 "couldn't register netdev. Error number %d\n", r);
1068 dev_dbg_f(&intf->dev, "successful\n");
1069 dev_info(&intf->dev,"%s\n", netdev->name);
1072 usb_reset_device(interface_to_usbdev(intf));
1073 zd_netdev_free(netdev);
1077 static void disconnect(struct usb_interface *intf)
1079 struct net_device *netdev = zd_intf_to_netdev(intf);
1080 struct zd_mac *mac = zd_netdev_mac(netdev);
1081 struct zd_usb *usb = &mac->chip.usb;
1083 /* Either something really bad happened, or we're just dealing with
1084 * a DEVICE_INSTALLER. */
1088 dev_dbg_f(zd_usb_dev(usb), "\n");
1090 zd_netdev_disconnect(netdev);
1092 /* Just in case something has gone wrong! */
1093 zd_usb_disable_rx(usb);
1094 zd_usb_disable_int(usb);
1096 /* If the disconnect has been caused by a removal of the
1097 * driver module, the reset allows reloading of the driver. If the
1098 * reset will not be executed here, the upload of the firmware in the
1099 * probe function caused by the reloading of the driver will fail.
1101 usb_reset_device(interface_to_usbdev(intf));
1103 zd_netdev_free(netdev);
1104 dev_dbg(&intf->dev, "disconnected\n");
1107 static struct usb_driver driver = {
1109 .id_table = usb_ids,
1111 .disconnect = disconnect,
1114 static int __init usb_init(void)
1118 pr_debug("usb_init()\n");
1120 r = usb_register(&driver);
1122 printk(KERN_ERR "usb_register() failed. Error number %d\n", r);
1126 pr_debug("zd1211rw initialized\n");
1130 static void __exit usb_exit(void)
1132 pr_debug("usb_exit()\n");
1133 usb_deregister(&driver);
1136 module_init(usb_init);
1137 module_exit(usb_exit);
1139 static int usb_int_regs_length(unsigned int count)
1141 return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data);
1144 static void prepare_read_regs_int(struct zd_usb *usb)
1146 struct zd_usb_interrupt *intr = &usb->intr;
1148 spin_lock(&intr->lock);
1149 intr->read_regs_enabled = 1;
1150 INIT_COMPLETION(intr->read_regs.completion);
1151 spin_unlock(&intr->lock);
1154 static int get_results(struct zd_usb *usb, u16 *values,
1155 struct usb_req_read_regs *req, unsigned int count)
1159 struct zd_usb_interrupt *intr = &usb->intr;
1160 struct read_regs_int *rr = &intr->read_regs;
1161 struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer;
1163 spin_lock(&intr->lock);
1166 /* The created block size seems to be larger than expected.
1167 * However results appear to be correct.
1169 if (rr->length < usb_int_regs_length(count)) {
1170 dev_dbg_f(zd_usb_dev(usb),
1171 "error: actual length %d less than expected %d\n",
1172 rr->length, usb_int_regs_length(count));
1175 if (rr->length > sizeof(rr->buffer)) {
1176 dev_dbg_f(zd_usb_dev(usb),
1177 "error: actual length %d exceeds buffer size %zu\n",
1178 rr->length, sizeof(rr->buffer));
1182 for (i = 0; i < count; i++) {
1183 struct reg_data *rd = ®s->regs[i];
1184 if (rd->addr != req->addr[i]) {
1185 dev_dbg_f(zd_usb_dev(usb),
1186 "rd[%d] addr %#06hx expected %#06hx\n", i,
1187 le16_to_cpu(rd->addr),
1188 le16_to_cpu(req->addr[i]));
1191 values[i] = le16_to_cpu(rd->value);
1196 spin_unlock(&intr->lock);
1200 int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
1201 const zd_addr_t *addresses, unsigned int count)
1204 int i, req_len, actual_req_len;
1205 struct usb_device *udev;
1206 struct usb_req_read_regs *req = NULL;
1207 unsigned long timeout;
1210 dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n");
1213 if (count > USB_MAX_IOREAD16_COUNT) {
1214 dev_dbg_f(zd_usb_dev(usb),
1215 "error: count %u exceeds possible max %u\n",
1216 count, USB_MAX_IOREAD16_COUNT);
1220 dev_dbg_f(zd_usb_dev(usb),
1221 "error: io in atomic context not supported\n");
1222 return -EWOULDBLOCK;
1224 if (!usb_int_enabled(usb)) {
1225 dev_dbg_f(zd_usb_dev(usb),
1226 "error: usb interrupt not enabled\n");
1227 return -EWOULDBLOCK;
1230 req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
1231 req = kmalloc(req_len, GFP_NOFS);
1234 req->id = cpu_to_le16(USB_REQ_READ_REGS);
1235 for (i = 0; i < count; i++)
1236 req->addr[i] = cpu_to_le16(usb_addr(usb, addresses[i]));
1238 udev = zd_usb_to_usbdev(usb);
1239 prepare_read_regs_int(usb);
1240 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1241 req, req_len, &actual_req_len, 1000 /* ms */);
1243 dev_dbg_f(zd_usb_dev(usb),
1244 "error in usb_bulk_msg(). Error number %d\n", r);
1247 if (req_len != actual_req_len) {
1248 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
1249 " req_len %d != actual_req_len %d\n",
1250 req_len, actual_req_len);
1255 timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
1256 msecs_to_jiffies(1000));
1258 disable_read_regs_int(usb);
1259 dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
1264 r = get_results(usb, values, req, count);
1270 int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
1274 struct usb_device *udev;
1275 struct usb_req_write_regs *req = NULL;
1276 int i, req_len, actual_req_len;
1280 if (count > USB_MAX_IOWRITE16_COUNT) {
1281 dev_dbg_f(zd_usb_dev(usb),
1282 "error: count %u exceeds possible max %u\n",
1283 count, USB_MAX_IOWRITE16_COUNT);
1287 dev_dbg_f(zd_usb_dev(usb),
1288 "error: io in atomic context not supported\n");
1289 return -EWOULDBLOCK;
1292 req_len = sizeof(struct usb_req_write_regs) +
1293 count * sizeof(struct reg_data);
1294 req = kmalloc(req_len, GFP_NOFS);
1298 req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
1299 for (i = 0; i < count; i++) {
1300 struct reg_data *rw = &req->reg_writes[i];
1301 rw->addr = cpu_to_le16(usb_addr(usb, ioreqs[i].addr));
1302 rw->value = cpu_to_le16(ioreqs[i].value);
1305 udev = zd_usb_to_usbdev(usb);
1306 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1307 req, req_len, &actual_req_len, 1000 /* ms */);
1309 dev_dbg_f(zd_usb_dev(usb),
1310 "error in usb_bulk_msg(). Error number %d\n", r);
1313 if (req_len != actual_req_len) {
1314 dev_dbg_f(zd_usb_dev(usb),
1315 "error in usb_bulk_msg()"
1316 " req_len %d != actual_req_len %d\n",
1317 req_len, actual_req_len);
1322 /* FALL-THROUGH with r == 0 */
1328 int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
1331 struct usb_device *udev;
1332 struct usb_req_rfwrite *req = NULL;
1333 int i, req_len, actual_req_len;
1334 u16 bit_value_template;
1337 dev_dbg_f(zd_usb_dev(usb),
1338 "error: io in atomic context not supported\n");
1339 return -EWOULDBLOCK;
1341 if (bits < USB_MIN_RFWRITE_BIT_COUNT) {
1342 dev_dbg_f(zd_usb_dev(usb),
1343 "error: bits %d are smaller than"
1344 " USB_MIN_RFWRITE_BIT_COUNT %d\n",
1345 bits, USB_MIN_RFWRITE_BIT_COUNT);
1348 if (bits > USB_MAX_RFWRITE_BIT_COUNT) {
1349 dev_dbg_f(zd_usb_dev(usb),
1350 "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n",
1351 bits, USB_MAX_RFWRITE_BIT_COUNT);
1355 if (value & (~0UL << bits)) {
1356 dev_dbg_f(zd_usb_dev(usb),
1357 "error: value %#09x has bits >= %d set\n",
1363 dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits);
1365 r = zd_usb_ioread16(usb, &bit_value_template, CR203);
1367 dev_dbg_f(zd_usb_dev(usb),
1368 "error %d: Couldn't read CR203\n", r);
1371 bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
1373 req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
1374 req = kmalloc(req_len, GFP_NOFS);
1378 req->id = cpu_to_le16(USB_REQ_WRITE_RF);
1379 /* 1: 3683a, but not used in ZYDAS driver */
1380 req->value = cpu_to_le16(2);
1381 req->bits = cpu_to_le16(bits);
1383 for (i = 0; i < bits; i++) {
1384 u16 bv = bit_value_template;
1385 if (value & (1 << (bits-1-i)))
1387 req->bit_values[i] = cpu_to_le16(bv);
1390 udev = zd_usb_to_usbdev(usb);
1391 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
1392 req, req_len, &actual_req_len, 1000 /* ms */);
1394 dev_dbg_f(zd_usb_dev(usb),
1395 "error in usb_bulk_msg(). Error number %d\n", r);
1398 if (req_len != actual_req_len) {
1399 dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
1400 " req_len %d != actual_req_len %d\n",
1401 req_len, actual_req_len);
1406 /* FALL-THROUGH with r == 0 */