| /* zd_usb.c |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/firmware.h> |
| #include <linux/device.h> |
| #include <linux/errno.h> |
| #include <linux/skbuff.h> |
| #include <linux/usb.h> |
| #include <linux/workqueue.h> |
| #include <net/ieee80211.h> |
| #include <asm/unaligned.h> |
| |
| #include "zd_def.h" |
| #include "zd_netdev.h" |
| #include "zd_mac.h" |
| #include "zd_usb.h" |
| #include "zd_util.h" |
| |
| static struct usb_device_id usb_ids[] = { |
| /* ZD1211 */ |
| { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x0df6, 0x9075), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x13b1, 0x001e), .driver_info = DEVICE_ZD1211 }, |
| { USB_DEVICE(0x0586, 0x3407), .driver_info = DEVICE_ZD1211 }, |
| /* ZD1211B */ |
| { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B }, |
| { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B }, |
| /* "Driverless" devices that need ejecting */ |
| { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER }, |
| { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER }, |
| {} |
| }; |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip."); |
| MODULE_AUTHOR("Ulrich Kunitz"); |
| MODULE_AUTHOR("Daniel Drake"); |
| MODULE_VERSION("1.0"); |
| MODULE_DEVICE_TABLE(usb, usb_ids); |
| |
| #define FW_ZD1211_PREFIX "zd1211/zd1211_" |
| #define FW_ZD1211B_PREFIX "zd1211/zd1211b_" |
| |
| /* USB device initialization */ |
| |
| static int request_fw_file( |
| const struct firmware **fw, const char *name, struct device *device) |
| { |
| int r; |
| |
| dev_dbg_f(device, "fw name %s\n", name); |
| |
| r = request_firmware(fw, name, device); |
| if (r) |
| dev_err(device, |
| "Could not load firmware file %s. Error number %d\n", |
| name, r); |
| return r; |
| } |
| |
| static inline u16 get_bcdDevice(const struct usb_device *udev) |
| { |
| return le16_to_cpu(udev->descriptor.bcdDevice); |
| } |
| |
| enum upload_code_flags { |
| REBOOT = 1, |
| }; |
| |
| /* Ensures that MAX_TRANSFER_SIZE is even. */ |
| #define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1) |
| |
| static int upload_code(struct usb_device *udev, |
| const u8 *data, size_t size, u16 code_offset, int flags) |
| { |
| u8 *p; |
| int r; |
| |
| /* USB request blocks need "kmalloced" buffers. |
| */ |
| p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL); |
| if (!p) { |
| dev_err(&udev->dev, "out of memory\n"); |
| r = -ENOMEM; |
| goto error; |
| } |
| |
| size &= ~1; |
| while (size > 0) { |
| size_t transfer_size = size <= MAX_TRANSFER_SIZE ? |
| size : MAX_TRANSFER_SIZE; |
| |
| dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size); |
| |
| memcpy(p, data, transfer_size); |
| r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), |
| USB_REQ_FIRMWARE_DOWNLOAD, |
| USB_DIR_OUT | USB_TYPE_VENDOR, |
| code_offset, 0, p, transfer_size, 1000 /* ms */); |
| if (r < 0) { |
| dev_err(&udev->dev, |
| "USB control request for firmware upload" |
| " failed. Error number %d\n", r); |
| goto error; |
| } |
| transfer_size = r & ~1; |
| |
| size -= transfer_size; |
| data += transfer_size; |
| code_offset += transfer_size/sizeof(u16); |
| } |
| |
| if (flags & REBOOT) { |
| u8 ret; |
| |
| r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
| USB_REQ_FIRMWARE_CONFIRM, |
| USB_DIR_IN | USB_TYPE_VENDOR, |
| 0, 0, &ret, sizeof(ret), 5000 /* ms */); |
| if (r != sizeof(ret)) { |
| dev_err(&udev->dev, |
| "control request firmeware confirmation failed." |
| " Return value %d\n", r); |
| if (r >= 0) |
| r = -ENODEV; |
| goto error; |
| } |
| if (ret & 0x80) { |
| dev_err(&udev->dev, |
| "Internal error while downloading." |
| " Firmware confirm return value %#04x\n", |
| (unsigned int)ret); |
| r = -ENODEV; |
| goto error; |
| } |
| dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n", |
| (unsigned int)ret); |
| } |
| |
| r = 0; |
| error: |
| kfree(p); |
| return r; |
| } |
| |
| static u16 get_word(const void *data, u16 offset) |
| { |
| const __le16 *p = data; |
| return le16_to_cpu(p[offset]); |
| } |
| |
| static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size, |
| const char* postfix) |
| { |
| scnprintf(buffer, size, "%s%s", |
| usb->is_zd1211b ? |
| FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX, |
| postfix); |
| return buffer; |
| } |
| |
| static int handle_version_mismatch(struct zd_usb *usb, |
| const struct firmware *ub_fw) |
| { |
| struct usb_device *udev = zd_usb_to_usbdev(usb); |
| const struct firmware *ur_fw = NULL; |
| int offset; |
| int r = 0; |
| char fw_name[128]; |
| |
| r = request_fw_file(&ur_fw, |
| get_fw_name(usb, fw_name, sizeof(fw_name), "ur"), |
| &udev->dev); |
| if (r) |
| goto error; |
| |
| r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT); |
| if (r) |
| goto error; |
| |
| offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16)); |
| r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset, |
| E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT); |
| |
| /* At this point, the vendor driver downloads the whole firmware |
| * image, hacks around with version IDs, and uploads it again, |
| * completely overwriting the boot code. We do not do this here as |
| * it is not required on any tested devices, and it is suspected to |
| * cause problems. */ |
| error: |
| release_firmware(ur_fw); |
| return r; |
| } |
| |
| static int upload_firmware(struct zd_usb *usb) |
| { |
| int r; |
| u16 fw_bcdDevice; |
| u16 bcdDevice; |
| struct usb_device *udev = zd_usb_to_usbdev(usb); |
| const struct firmware *ub_fw = NULL; |
| const struct firmware *uph_fw = NULL; |
| char fw_name[128]; |
| |
| bcdDevice = get_bcdDevice(udev); |
| |
| r = request_fw_file(&ub_fw, |
| get_fw_name(usb, fw_name, sizeof(fw_name), "ub"), |
| &udev->dev); |
| if (r) |
| goto error; |
| |
| fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET); |
| |
| if (fw_bcdDevice != bcdDevice) { |
| dev_info(&udev->dev, |
| "firmware version %#06x and device bootcode version " |
| "%#06x differ\n", fw_bcdDevice, bcdDevice); |
| if (bcdDevice <= 0x4313) |
| dev_warn(&udev->dev, "device has old bootcode, please " |
| "report success or failure\n"); |
| |
| r = handle_version_mismatch(usb, ub_fw); |
| if (r) |
| goto error; |
| } else { |
| dev_dbg_f(&udev->dev, |
| "firmware device id %#06x is equal to the " |
| "actual device id\n", fw_bcdDevice); |
| } |
| |
| |
| r = request_fw_file(&uph_fw, |
| get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"), |
| &udev->dev); |
| if (r) |
| goto error; |
| |
| r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT); |
| if (r) { |
| dev_err(&udev->dev, |
| "Could not upload firmware code uph. Error number %d\n", |
| r); |
| } |
| |
| /* FALL-THROUGH */ |
| error: |
| release_firmware(ub_fw); |
| release_firmware(uph_fw); |
| return r; |
| } |
| |
| /* Read data from device address space using "firmware interface" which does |
| * not require firmware to be loaded. */ |
| int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len) |
| { |
| int r; |
| struct usb_device *udev = zd_usb_to_usbdev(usb); |
| |
| r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
| USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0, |
| data, len, 5000); |
| if (r < 0) { |
| dev_err(&udev->dev, |
| "read over firmware interface failed: %d\n", r); |
| return r; |
| } else if (r != len) { |
| dev_err(&udev->dev, |
| "incomplete read over firmware interface: %d/%d\n", |
| r, len); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| #define urb_dev(urb) (&(urb)->dev->dev) |
| |
| static inline void handle_regs_int(struct urb *urb) |
| { |
| struct zd_usb *usb = urb->context; |
| struct zd_usb_interrupt *intr = &usb->intr; |
| int len; |
| |
| ZD_ASSERT(in_interrupt()); |
| spin_lock(&intr->lock); |
| |
| if (intr->read_regs_enabled) { |
| intr->read_regs.length = len = urb->actual_length; |
| |
| if (len > sizeof(intr->read_regs.buffer)) |
| len = sizeof(intr->read_regs.buffer); |
| memcpy(intr->read_regs.buffer, urb->transfer_buffer, len); |
| intr->read_regs_enabled = 0; |
| complete(&intr->read_regs.completion); |
| goto out; |
| } |
| |
| dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n"); |
| out: |
| spin_unlock(&intr->lock); |
| } |
| |
| static inline void handle_retry_failed_int(struct urb *urb) |
| { |
| struct zd_usb *usb = urb->context; |
| struct zd_mac *mac = zd_usb_to_mac(usb); |
| struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
| |
| ieee->stats.tx_errors++; |
| ieee->ieee_stats.tx_retry_limit_exceeded++; |
| dev_dbg_f(urb_dev(urb), "retry failed interrupt\n"); |
| } |
| |
| |
| static void int_urb_complete(struct urb *urb) |
| { |
| int r; |
| struct usb_int_header *hdr; |
| |
| switch (urb->status) { |
| case 0: |
| break; |
| case -ESHUTDOWN: |
| case -EINVAL: |
| case -ENODEV: |
| case -ENOENT: |
| case -ECONNRESET: |
| case -EPIPE: |
| goto kfree; |
| default: |
| goto resubmit; |
| } |
| |
| if (urb->actual_length < sizeof(hdr)) { |
| dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb); |
| goto resubmit; |
| } |
| |
| hdr = urb->transfer_buffer; |
| if (hdr->type != USB_INT_TYPE) { |
| dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb); |
| goto resubmit; |
| } |
| |
| switch (hdr->id) { |
| case USB_INT_ID_REGS: |
| handle_regs_int(urb); |
| break; |
| case USB_INT_ID_RETRY_FAILED: |
| handle_retry_failed_int(urb); |
| break; |
| default: |
| dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb, |
| (unsigned int)hdr->id); |
| goto resubmit; |
| } |
| |
| resubmit: |
| r = usb_submit_urb(urb, GFP_ATOMIC); |
| if (r) { |
| dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb); |
| goto kfree; |
| } |
| return; |
| kfree: |
| kfree(urb->transfer_buffer); |
| } |
| |
| static inline int int_urb_interval(struct usb_device *udev) |
| { |
| switch (udev->speed) { |
| case USB_SPEED_HIGH: |
| return 4; |
| case USB_SPEED_LOW: |
| return 10; |
| case USB_SPEED_FULL: |
| default: |
| return 1; |
| } |
| } |
| |
| static inline int usb_int_enabled(struct zd_usb *usb) |
| { |
| unsigned long flags; |
| struct zd_usb_interrupt *intr = &usb->intr; |
| struct urb *urb; |
| |
| spin_lock_irqsave(&intr->lock, flags); |
| urb = intr->urb; |
| spin_unlock_irqrestore(&intr->lock, flags); |
| return urb != NULL; |
| } |
| |
| int zd_usb_enable_int(struct zd_usb *usb) |
| { |
| int r; |
| struct usb_device *udev; |
| struct zd_usb_interrupt *intr = &usb->intr; |
| void *transfer_buffer = NULL; |
| struct urb *urb; |
| |
| dev_dbg_f(zd_usb_dev(usb), "\n"); |
| |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) { |
| r = -ENOMEM; |
| goto out; |
| } |
| |
| ZD_ASSERT(!irqs_disabled()); |
| spin_lock_irq(&intr->lock); |
| if (intr->urb) { |
| spin_unlock_irq(&intr->lock); |
| r = 0; |
| goto error_free_urb; |
| } |
| intr->urb = urb; |
| spin_unlock_irq(&intr->lock); |
| |
| /* TODO: make it a DMA buffer */ |
| r = -ENOMEM; |
| transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_KERNEL); |
| if (!transfer_buffer) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "couldn't allocate transfer_buffer\n"); |
| goto error_set_urb_null; |
| } |
| |
| udev = zd_usb_to_usbdev(usb); |
| usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN), |
| transfer_buffer, USB_MAX_EP_INT_BUFFER, |
| int_urb_complete, usb, |
| intr->interval); |
| |
| dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb); |
| r = usb_submit_urb(urb, GFP_KERNEL); |
| if (r) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "Couldn't submit urb. Error number %d\n", r); |
| goto error; |
| } |
| |
| return 0; |
| error: |
| kfree(transfer_buffer); |
| error_set_urb_null: |
| spin_lock_irq(&intr->lock); |
| intr->urb = NULL; |
| spin_unlock_irq(&intr->lock); |
| error_free_urb: |
| usb_free_urb(urb); |
| out: |
| return r; |
| } |
| |
| void zd_usb_disable_int(struct zd_usb *usb) |
| { |
| unsigned long flags; |
| struct zd_usb_interrupt *intr = &usb->intr; |
| struct urb *urb; |
| |
| spin_lock_irqsave(&intr->lock, flags); |
| urb = intr->urb; |
| if (!urb) { |
| spin_unlock_irqrestore(&intr->lock, flags); |
| return; |
| } |
| intr->urb = NULL; |
| spin_unlock_irqrestore(&intr->lock, flags); |
| |
| usb_kill_urb(urb); |
| dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb); |
| usb_free_urb(urb); |
| } |
| |
| static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer, |
| unsigned int length) |
| { |
| int i; |
| struct zd_mac *mac = zd_usb_to_mac(usb); |
| const struct rx_length_info *length_info; |
| |
| if (length < sizeof(struct rx_length_info)) { |
| /* It's not a complete packet anyhow. */ |
| struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac); |
| ieee->stats.rx_errors++; |
| ieee->stats.rx_length_errors++; |
| return; |
| } |
| length_info = (struct rx_length_info *) |
| (buffer + length - sizeof(struct rx_length_info)); |
| |
| /* It might be that three frames are merged into a single URB |
| * transaction. We have to check for the length info tag. |
| * |
| * While testing we discovered that length_info might be unaligned, |
| * because if USB transactions are merged, the last packet will not |
| * be padded. Unaligned access might also happen if the length_info |
| * structure is not present. |
| */ |
| if (get_unaligned(&length_info->tag) == cpu_to_le16(RX_LENGTH_INFO_TAG)) |
| { |
| unsigned int l, k, n; |
| for (i = 0, l = 0;; i++) { |
| k = le16_to_cpu(get_unaligned(&length_info->length[i])); |
| if (k == 0) |
| return; |
| n = l+k; |
| if (n > length) |
| return; |
| zd_mac_rx_irq(mac, buffer+l, k); |
| if (i >= 2) |
| return; |
| l = (n+3) & ~3; |
| } |
| } else { |
| zd_mac_rx_irq(mac, buffer, length); |
| } |
| } |
| |
| static void rx_urb_complete(struct urb *urb) |
| { |
| struct zd_usb *usb; |
| struct zd_usb_rx *rx; |
| const u8 *buffer; |
| unsigned int length; |
| |
| switch (urb->status) { |
| case 0: |
| break; |
| case -ESHUTDOWN: |
| case -EINVAL: |
| case -ENODEV: |
| case -ENOENT: |
| case -ECONNRESET: |
| case -EPIPE: |
| return; |
| default: |
| dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
| goto resubmit; |
| } |
| |
| buffer = urb->transfer_buffer; |
| length = urb->actual_length; |
| usb = urb->context; |
| rx = &usb->rx; |
| |
| if (length%rx->usb_packet_size > rx->usb_packet_size-4) { |
| /* If there is an old first fragment, we don't care. */ |
| dev_dbg_f(urb_dev(urb), "*** first fragment ***\n"); |
| ZD_ASSERT(length <= ARRAY_SIZE(rx->fragment)); |
| spin_lock(&rx->lock); |
| memcpy(rx->fragment, buffer, length); |
| rx->fragment_length = length; |
| spin_unlock(&rx->lock); |
| goto resubmit; |
| } |
| |
| spin_lock(&rx->lock); |
| if (rx->fragment_length > 0) { |
| /* We are on a second fragment, we believe */ |
| ZD_ASSERT(length + rx->fragment_length <= |
| ARRAY_SIZE(rx->fragment)); |
| dev_dbg_f(urb_dev(urb), "*** second fragment ***\n"); |
| memcpy(rx->fragment+rx->fragment_length, buffer, length); |
| handle_rx_packet(usb, rx->fragment, |
| rx->fragment_length + length); |
| rx->fragment_length = 0; |
| spin_unlock(&rx->lock); |
| } else { |
| spin_unlock(&rx->lock); |
| handle_rx_packet(usb, buffer, length); |
| } |
| |
| resubmit: |
| usb_submit_urb(urb, GFP_ATOMIC); |
| } |
| |
| static struct urb *alloc_urb(struct zd_usb *usb) |
| { |
| struct usb_device *udev = zd_usb_to_usbdev(usb); |
| struct urb *urb; |
| void *buffer; |
| |
| urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!urb) |
| return NULL; |
| buffer = usb_buffer_alloc(udev, USB_MAX_RX_SIZE, GFP_KERNEL, |
| &urb->transfer_dma); |
| if (!buffer) { |
| usb_free_urb(urb); |
| return NULL; |
| } |
| |
| usb_fill_bulk_urb(urb, udev, usb_rcvbulkpipe(udev, EP_DATA_IN), |
| buffer, USB_MAX_RX_SIZE, |
| rx_urb_complete, usb); |
| urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| |
| return urb; |
| } |
| |
| static void free_urb(struct urb *urb) |
| { |
| if (!urb) |
| return; |
| usb_buffer_free(urb->dev, urb->transfer_buffer_length, |
| urb->transfer_buffer, urb->transfer_dma); |
| usb_free_urb(urb); |
| } |
| |
| int zd_usb_enable_rx(struct zd_usb *usb) |
| { |
| int i, r; |
| struct zd_usb_rx *rx = &usb->rx; |
| struct urb **urbs; |
| |
| dev_dbg_f(zd_usb_dev(usb), "\n"); |
| |
| r = -ENOMEM; |
| urbs = kcalloc(URBS_COUNT, sizeof(struct urb *), GFP_KERNEL); |
| if (!urbs) |
| goto error; |
| for (i = 0; i < URBS_COUNT; i++) { |
| urbs[i] = alloc_urb(usb); |
| if (!urbs[i]) |
| goto error; |
| } |
| |
| ZD_ASSERT(!irqs_disabled()); |
| spin_lock_irq(&rx->lock); |
| if (rx->urbs) { |
| spin_unlock_irq(&rx->lock); |
| r = 0; |
| goto error; |
| } |
| rx->urbs = urbs; |
| rx->urbs_count = URBS_COUNT; |
| spin_unlock_irq(&rx->lock); |
| |
| for (i = 0; i < URBS_COUNT; i++) { |
| r = usb_submit_urb(urbs[i], GFP_KERNEL); |
| if (r) |
| goto error_submit; |
| } |
| |
| return 0; |
| error_submit: |
| for (i = 0; i < URBS_COUNT; i++) { |
| usb_kill_urb(urbs[i]); |
| } |
| spin_lock_irq(&rx->lock); |
| rx->urbs = NULL; |
| rx->urbs_count = 0; |
| spin_unlock_irq(&rx->lock); |
| error: |
| if (urbs) { |
| for (i = 0; i < URBS_COUNT; i++) |
| free_urb(urbs[i]); |
| } |
| return r; |
| } |
| |
| void zd_usb_disable_rx(struct zd_usb *usb) |
| { |
| int i; |
| unsigned long flags; |
| struct urb **urbs; |
| unsigned int count; |
| struct zd_usb_rx *rx = &usb->rx; |
| |
| spin_lock_irqsave(&rx->lock, flags); |
| urbs = rx->urbs; |
| count = rx->urbs_count; |
| spin_unlock_irqrestore(&rx->lock, flags); |
| if (!urbs) |
| return; |
| |
| for (i = 0; i < count; i++) { |
| usb_kill_urb(urbs[i]); |
| free_urb(urbs[i]); |
| } |
| kfree(urbs); |
| |
| spin_lock_irqsave(&rx->lock, flags); |
| rx->urbs = NULL; |
| rx->urbs_count = 0; |
| spin_unlock_irqrestore(&rx->lock, flags); |
| } |
| |
| static void tx_urb_complete(struct urb *urb) |
| { |
| int r; |
| |
| switch (urb->status) { |
| case 0: |
| break; |
| case -ESHUTDOWN: |
| case -EINVAL: |
| case -ENODEV: |
| case -ENOENT: |
| case -ECONNRESET: |
| case -EPIPE: |
| dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
| break; |
| default: |
| dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status); |
| goto resubmit; |
| } |
| free_urb: |
| usb_buffer_free(urb->dev, urb->transfer_buffer_length, |
| urb->transfer_buffer, urb->transfer_dma); |
| usb_free_urb(urb); |
| return; |
| resubmit: |
| r = usb_submit_urb(urb, GFP_ATOMIC); |
| if (r) { |
| dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r); |
| goto free_urb; |
| } |
| } |
| |
| /* Puts the frame on the USB endpoint. It doesn't wait for |
| * completion. The frame must contain the control set. |
| */ |
| int zd_usb_tx(struct zd_usb *usb, const u8 *frame, unsigned int length) |
| { |
| int r; |
| struct usb_device *udev = zd_usb_to_usbdev(usb); |
| struct urb *urb; |
| void *buffer; |
| |
| urb = usb_alloc_urb(0, GFP_ATOMIC); |
| if (!urb) { |
| r = -ENOMEM; |
| goto out; |
| } |
| |
| buffer = usb_buffer_alloc(zd_usb_to_usbdev(usb), length, GFP_ATOMIC, |
| &urb->transfer_dma); |
| if (!buffer) { |
| r = -ENOMEM; |
| goto error_free_urb; |
| } |
| memcpy(buffer, frame, length); |
| |
| usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT), |
| buffer, length, tx_urb_complete, NULL); |
| urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
| |
| r = usb_submit_urb(urb, GFP_ATOMIC); |
| if (r) |
| goto error; |
| return 0; |
| error: |
| usb_buffer_free(zd_usb_to_usbdev(usb), length, buffer, |
| urb->transfer_dma); |
| error_free_urb: |
| usb_free_urb(urb); |
| out: |
| return r; |
| } |
| |
| static inline void init_usb_interrupt(struct zd_usb *usb) |
| { |
| struct zd_usb_interrupt *intr = &usb->intr; |
| |
| spin_lock_init(&intr->lock); |
| intr->interval = int_urb_interval(zd_usb_to_usbdev(usb)); |
| init_completion(&intr->read_regs.completion); |
| intr->read_regs.cr_int_addr = cpu_to_le16((u16)CR_INTERRUPT); |
| } |
| |
| static inline void init_usb_rx(struct zd_usb *usb) |
| { |
| struct zd_usb_rx *rx = &usb->rx; |
| spin_lock_init(&rx->lock); |
| if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) { |
| rx->usb_packet_size = 512; |
| } else { |
| rx->usb_packet_size = 64; |
| } |
| ZD_ASSERT(rx->fragment_length == 0); |
| } |
| |
| static inline void init_usb_tx(struct zd_usb *usb) |
| { |
| /* FIXME: at this point we will allocate a fixed number of urb's for |
| * use in a cyclic scheme */ |
| } |
| |
| void zd_usb_init(struct zd_usb *usb, struct net_device *netdev, |
| struct usb_interface *intf) |
| { |
| memset(usb, 0, sizeof(*usb)); |
| usb->intf = usb_get_intf(intf); |
| usb_set_intfdata(usb->intf, netdev); |
| init_usb_interrupt(usb); |
| init_usb_tx(usb); |
| init_usb_rx(usb); |
| } |
| |
| void zd_usb_clear(struct zd_usb *usb) |
| { |
| usb_set_intfdata(usb->intf, NULL); |
| usb_put_intf(usb->intf); |
| ZD_MEMCLEAR(usb, sizeof(*usb)); |
| /* FIXME: usb_interrupt, usb_tx, usb_rx? */ |
| } |
| |
| static const char *speed(enum usb_device_speed speed) |
| { |
| switch (speed) { |
| case USB_SPEED_LOW: |
| return "low"; |
| case USB_SPEED_FULL: |
| return "full"; |
| case USB_SPEED_HIGH: |
| return "high"; |
| default: |
| return "unknown speed"; |
| } |
| } |
| |
| static int scnprint_id(struct usb_device *udev, char *buffer, size_t size) |
| { |
| return scnprintf(buffer, size, "%04hx:%04hx v%04hx %s", |
| le16_to_cpu(udev->descriptor.idVendor), |
| le16_to_cpu(udev->descriptor.idProduct), |
| get_bcdDevice(udev), |
| speed(udev->speed)); |
| } |
| |
| int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size) |
| { |
| struct usb_device *udev = interface_to_usbdev(usb->intf); |
| return scnprint_id(udev, buffer, size); |
| } |
| |
| #ifdef DEBUG |
| static void print_id(struct usb_device *udev) |
| { |
| char buffer[40]; |
| |
| scnprint_id(udev, buffer, sizeof(buffer)); |
| buffer[sizeof(buffer)-1] = 0; |
| dev_dbg_f(&udev->dev, "%s\n", buffer); |
| } |
| #else |
| #define print_id(udev) do { } while (0) |
| #endif |
| |
| static int eject_installer(struct usb_interface *intf) |
| { |
| struct usb_device *udev = interface_to_usbdev(intf); |
| struct usb_host_interface *iface_desc = &intf->altsetting[0]; |
| struct usb_endpoint_descriptor *endpoint; |
| unsigned char *cmd; |
| u8 bulk_out_ep; |
| int r; |
| |
| /* Find bulk out endpoint */ |
| endpoint = &iface_desc->endpoint[1].desc; |
| if ((endpoint->bEndpointAddress & USB_TYPE_MASK) == USB_DIR_OUT && |
| (endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == |
| USB_ENDPOINT_XFER_BULK) { |
| bulk_out_ep = endpoint->bEndpointAddress; |
| } else { |
| dev_err(&udev->dev, |
| "zd1211rw: Could not find bulk out endpoint\n"); |
| return -ENODEV; |
| } |
| |
| cmd = kzalloc(31, GFP_KERNEL); |
| if (cmd == NULL) |
| return -ENODEV; |
| |
| /* USB bulk command block */ |
| cmd[0] = 0x55; /* bulk command signature */ |
| cmd[1] = 0x53; /* bulk command signature */ |
| cmd[2] = 0x42; /* bulk command signature */ |
| cmd[3] = 0x43; /* bulk command signature */ |
| cmd[14] = 6; /* command length */ |
| |
| cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ |
| cmd[19] = 0x2; /* eject disc */ |
| |
| dev_info(&udev->dev, "Ejecting virtual installer media...\n"); |
| r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), |
| cmd, 31, NULL, 2000); |
| kfree(cmd); |
| if (r) |
| return r; |
| |
| /* At this point, the device disconnects and reconnects with the real |
| * ID numbers. */ |
| |
| usb_set_intfdata(intf, NULL); |
| return 0; |
| } |
| |
| int zd_usb_init_hw(struct zd_usb *usb) |
| { |
| int r; |
| struct zd_mac *mac = zd_usb_to_mac(usb); |
| |
| dev_dbg_f(zd_usb_dev(usb), "\n"); |
| |
| r = upload_firmware(usb); |
| if (r) { |
| dev_err(zd_usb_dev(usb), |
| "couldn't load firmware. Error number %d\n", r); |
| return r; |
| } |
| |
| r = usb_reset_configuration(zd_usb_to_usbdev(usb)); |
| if (r) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "couldn't reset configuration. Error number %d\n", r); |
| return r; |
| } |
| |
| r = zd_mac_init_hw(mac); |
| if (r) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "couldn't initialize mac. Error number %d\n", r); |
| return r; |
| } |
| |
| usb->initialized = 1; |
| return 0; |
| } |
| |
| static int probe(struct usb_interface *intf, const struct usb_device_id *id) |
| { |
| int r; |
| struct zd_usb *usb; |
| struct usb_device *udev = interface_to_usbdev(intf); |
| struct net_device *netdev = NULL; |
| |
| print_id(udev); |
| |
| if (id->driver_info & DEVICE_INSTALLER) |
| return eject_installer(intf); |
| |
| switch (udev->speed) { |
| case USB_SPEED_LOW: |
| case USB_SPEED_FULL: |
| case USB_SPEED_HIGH: |
| break; |
| default: |
| dev_dbg_f(&intf->dev, "Unknown USB speed\n"); |
| r = -ENODEV; |
| goto error; |
| } |
| |
| usb_reset_device(interface_to_usbdev(intf)); |
| |
| netdev = zd_netdev_alloc(intf); |
| if (netdev == NULL) { |
| r = -ENOMEM; |
| goto error; |
| } |
| |
| usb = &zd_netdev_mac(netdev)->chip.usb; |
| usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0; |
| |
| r = zd_mac_preinit_hw(zd_netdev_mac(netdev)); |
| if (r) { |
| dev_dbg_f(&intf->dev, |
| "couldn't initialize mac. Error number %d\n", r); |
| goto error; |
| } |
| |
| r = register_netdev(netdev); |
| if (r) { |
| dev_dbg_f(&intf->dev, |
| "couldn't register netdev. Error number %d\n", r); |
| goto error; |
| } |
| |
| dev_dbg_f(&intf->dev, "successful\n"); |
| dev_info(&intf->dev,"%s\n", netdev->name); |
| return 0; |
| error: |
| usb_reset_device(interface_to_usbdev(intf)); |
| zd_netdev_free(netdev); |
| return r; |
| } |
| |
| static void disconnect(struct usb_interface *intf) |
| { |
| struct net_device *netdev = zd_intf_to_netdev(intf); |
| struct zd_mac *mac = zd_netdev_mac(netdev); |
| struct zd_usb *usb = &mac->chip.usb; |
| |
| /* Either something really bad happened, or we're just dealing with |
| * a DEVICE_INSTALLER. */ |
| if (netdev == NULL) |
| return; |
| |
| dev_dbg_f(zd_usb_dev(usb), "\n"); |
| |
| zd_netdev_disconnect(netdev); |
| |
| /* Just in case something has gone wrong! */ |
| zd_usb_disable_rx(usb); |
| zd_usb_disable_int(usb); |
| |
| /* If the disconnect has been caused by a removal of the |
| * driver module, the reset allows reloading of the driver. If the |
| * reset will not be executed here, the upload of the firmware in the |
| * probe function caused by the reloading of the driver will fail. |
| */ |
| usb_reset_device(interface_to_usbdev(intf)); |
| |
| zd_netdev_free(netdev); |
| dev_dbg(&intf->dev, "disconnected\n"); |
| } |
| |
| static struct usb_driver driver = { |
| .name = "zd1211rw", |
| .id_table = usb_ids, |
| .probe = probe, |
| .disconnect = disconnect, |
| }; |
| |
| struct workqueue_struct *zd_workqueue; |
| |
| static int __init usb_init(void) |
| { |
| int r; |
| |
| pr_debug("%s usb_init()\n", driver.name); |
| |
| zd_workqueue = create_singlethread_workqueue(driver.name); |
| if (zd_workqueue == NULL) { |
| printk(KERN_ERR "%s couldn't create workqueue\n", driver.name); |
| return -ENOMEM; |
| } |
| |
| r = usb_register(&driver); |
| if (r) { |
| destroy_workqueue(zd_workqueue); |
| printk(KERN_ERR "%s usb_register() failed. Error number %d\n", |
| driver.name, r); |
| return r; |
| } |
| |
| pr_debug("%s initialized\n", driver.name); |
| return 0; |
| } |
| |
| static void __exit usb_exit(void) |
| { |
| pr_debug("%s usb_exit()\n", driver.name); |
| usb_deregister(&driver); |
| destroy_workqueue(zd_workqueue); |
| } |
| |
| module_init(usb_init); |
| module_exit(usb_exit); |
| |
| static int usb_int_regs_length(unsigned int count) |
| { |
| return sizeof(struct usb_int_regs) + count * sizeof(struct reg_data); |
| } |
| |
| static void prepare_read_regs_int(struct zd_usb *usb) |
| { |
| struct zd_usb_interrupt *intr = &usb->intr; |
| |
| spin_lock_irq(&intr->lock); |
| intr->read_regs_enabled = 1; |
| INIT_COMPLETION(intr->read_regs.completion); |
| spin_unlock_irq(&intr->lock); |
| } |
| |
| static void disable_read_regs_int(struct zd_usb *usb) |
| { |
| struct zd_usb_interrupt *intr = &usb->intr; |
| |
| spin_lock_irq(&intr->lock); |
| intr->read_regs_enabled = 0; |
| spin_unlock_irq(&intr->lock); |
| } |
| |
| static int get_results(struct zd_usb *usb, u16 *values, |
| struct usb_req_read_regs *req, unsigned int count) |
| { |
| int r; |
| int i; |
| struct zd_usb_interrupt *intr = &usb->intr; |
| struct read_regs_int *rr = &intr->read_regs; |
| struct usb_int_regs *regs = (struct usb_int_regs *)rr->buffer; |
| |
| spin_lock_irq(&intr->lock); |
| |
| r = -EIO; |
| /* The created block size seems to be larger than expected. |
| * However results appear to be correct. |
| */ |
| if (rr->length < usb_int_regs_length(count)) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error: actual length %d less than expected %d\n", |
| rr->length, usb_int_regs_length(count)); |
| goto error_unlock; |
| } |
| if (rr->length > sizeof(rr->buffer)) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error: actual length %d exceeds buffer size %zu\n", |
| rr->length, sizeof(rr->buffer)); |
| goto error_unlock; |
| } |
| |
| for (i = 0; i < count; i++) { |
| struct reg_data *rd = ®s->regs[i]; |
| if (rd->addr != req->addr[i]) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "rd[%d] addr %#06hx expected %#06hx\n", i, |
| le16_to_cpu(rd->addr), |
| le16_to_cpu(req->addr[i])); |
| goto error_unlock; |
| } |
| values[i] = le16_to_cpu(rd->value); |
| } |
| |
| r = 0; |
| error_unlock: |
| spin_unlock_irq(&intr->lock); |
| return r; |
| } |
| |
| int zd_usb_ioread16v(struct zd_usb *usb, u16 *values, |
| const zd_addr_t *addresses, unsigned int count) |
| { |
| int r; |
| int i, req_len, actual_req_len; |
| struct usb_device *udev; |
| struct usb_req_read_regs *req = NULL; |
| unsigned long timeout; |
| |
| if (count < 1) { |
| dev_dbg_f(zd_usb_dev(usb), "error: count is zero\n"); |
| return -EINVAL; |
| } |
| if (count > USB_MAX_IOREAD16_COUNT) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error: count %u exceeds possible max %u\n", |
| count, USB_MAX_IOREAD16_COUNT); |
| return -EINVAL; |
| } |
| if (in_atomic()) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error: io in atomic context not supported\n"); |
| return -EWOULDBLOCK; |
| } |
| if (!usb_int_enabled(usb)) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error: usb interrupt not enabled\n"); |
| return -EWOULDBLOCK; |
| } |
| |
| req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16); |
| req = kmalloc(req_len, GFP_KERNEL); |
| if (!req) |
| return -ENOMEM; |
| req->id = cpu_to_le16(USB_REQ_READ_REGS); |
| for (i = 0; i < count; i++) |
| req->addr[i] = cpu_to_le16((u16)addresses[i]); |
| |
| udev = zd_usb_to_usbdev(usb); |
| prepare_read_regs_int(usb); |
| r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), |
| req, req_len, &actual_req_len, 1000 /* ms */); |
| if (r) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error in usb_bulk_msg(). Error number %d\n", r); |
| goto error; |
| } |
| if (req_len != actual_req_len) { |
| dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n" |
| " req_len %d != actual_req_len %d\n", |
| req_len, actual_req_len); |
| r = -EIO; |
| goto error; |
| } |
| |
| timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion, |
| msecs_to_jiffies(1000)); |
| if (!timeout) { |
| disable_read_regs_int(usb); |
| dev_dbg_f(zd_usb_dev(usb), "read timed out\n"); |
| r = -ETIMEDOUT; |
| goto error; |
| } |
| |
| r = get_results(usb, values, req, count); |
| error: |
| kfree(req); |
| return r; |
| } |
| |
| int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs, |
| unsigned int count) |
| { |
| int r; |
| struct usb_device *udev; |
| struct usb_req_write_regs *req = NULL; |
| int i, req_len, actual_req_len; |
| |
| if (count == 0) |
| return 0; |
| if (count > USB_MAX_IOWRITE16_COUNT) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error: count %u exceeds possible max %u\n", |
| count, USB_MAX_IOWRITE16_COUNT); |
| return -EINVAL; |
| } |
| if (in_atomic()) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error: io in atomic context not supported\n"); |
| return -EWOULDBLOCK; |
| } |
| |
| req_len = sizeof(struct usb_req_write_regs) + |
| count * sizeof(struct reg_data); |
| req = kmalloc(req_len, GFP_KERNEL); |
| if (!req) |
| return -ENOMEM; |
| |
| req->id = cpu_to_le16(USB_REQ_WRITE_REGS); |
| for (i = 0; i < count; i++) { |
| struct reg_data *rw = &req->reg_writes[i]; |
| rw->addr = cpu_to_le16((u16)ioreqs[i].addr); |
| rw->value = cpu_to_le16(ioreqs[i].value); |
| } |
| |
| udev = zd_usb_to_usbdev(usb); |
| r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), |
| req, req_len, &actual_req_len, 1000 /* ms */); |
| if (r) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error in usb_bulk_msg(). Error number %d\n", r); |
| goto error; |
| } |
| if (req_len != actual_req_len) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error in usb_bulk_msg()" |
| " req_len %d != actual_req_len %d\n", |
| req_len, actual_req_len); |
| r = -EIO; |
| goto error; |
| } |
| |
| /* FALL-THROUGH with r == 0 */ |
| error: |
| kfree(req); |
| return r; |
| } |
| |
| int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits) |
| { |
| int r; |
| struct usb_device *udev; |
| struct usb_req_rfwrite *req = NULL; |
| int i, req_len, actual_req_len; |
| u16 bit_value_template; |
| |
| if (in_atomic()) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error: io in atomic context not supported\n"); |
| return -EWOULDBLOCK; |
| } |
| if (bits < USB_MIN_RFWRITE_BIT_COUNT) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error: bits %d are smaller than" |
| " USB_MIN_RFWRITE_BIT_COUNT %d\n", |
| bits, USB_MIN_RFWRITE_BIT_COUNT); |
| return -EINVAL; |
| } |
| if (bits > USB_MAX_RFWRITE_BIT_COUNT) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error: bits %d exceed USB_MAX_RFWRITE_BIT_COUNT %d\n", |
| bits, USB_MAX_RFWRITE_BIT_COUNT); |
| return -EINVAL; |
| } |
| #ifdef DEBUG |
| if (value & (~0UL << bits)) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error: value %#09x has bits >= %d set\n", |
| value, bits); |
| return -EINVAL; |
| } |
| #endif /* DEBUG */ |
| |
| dev_dbg_f(zd_usb_dev(usb), "value %#09x bits %d\n", value, bits); |
| |
| r = zd_usb_ioread16(usb, &bit_value_template, CR203); |
| if (r) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error %d: Couldn't read CR203\n", r); |
| goto out; |
| } |
| bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA); |
| |
| req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16); |
| req = kmalloc(req_len, GFP_KERNEL); |
| if (!req) |
| return -ENOMEM; |
| |
| req->id = cpu_to_le16(USB_REQ_WRITE_RF); |
| /* 1: 3683a, but not used in ZYDAS driver */ |
| req->value = cpu_to_le16(2); |
| req->bits = cpu_to_le16(bits); |
| |
| for (i = 0; i < bits; i++) { |
| u16 bv = bit_value_template; |
| if (value & (1 << (bits-1-i))) |
| bv |= RF_DATA; |
| req->bit_values[i] = cpu_to_le16(bv); |
| } |
| |
| udev = zd_usb_to_usbdev(usb); |
| r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT), |
| req, req_len, &actual_req_len, 1000 /* ms */); |
| if (r) { |
| dev_dbg_f(zd_usb_dev(usb), |
| "error in usb_bulk_msg(). Error number %d\n", r); |
| goto out; |
| } |
| if (req_len != actual_req_len) { |
| dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()" |
| " req_len %d != actual_req_len %d\n", |
| req_len, actual_req_len); |
| r = -EIO; |
| goto out; |
| } |
| |
| /* FALL-THROUGH with r == 0 */ |
| out: |
| kfree(req); |
| return r; |
| } |