a3fa3aba7a
Tested by TiCPU on irc zd1211 chip 13b1:001e v4802 high 00-14-bf AL2230_RF pa0 g--- Signed-off-by: Daniel Drake <dsd@gentoo.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1343 lines
32 KiB
C
1343 lines
32 KiB
C
/* zd_usb.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <asm/unaligned.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/firmware.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/skbuff.h>
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#include <linux/usb.h>
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#include <linux/workqueue.h>
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#include <net/ieee80211.h>
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#include "zd_def.h"
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#include "zd_netdev.h"
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#include "zd_mac.h"
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#include "zd_usb.h"
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#include "zd_util.h"
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static struct usb_device_id usb_ids[] = {
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/* ZD1211 */
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{ USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x13b1, 0x001e), .driver_info = DEVICE_ZD1211 },
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/* ZD1211B */
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{ USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B },
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/* "Driverless" devices that need ejecting */
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{ USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
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{}
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};
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
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MODULE_AUTHOR("Ulrich Kunitz");
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MODULE_AUTHOR("Daniel Drake");
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MODULE_VERSION("1.0");
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MODULE_DEVICE_TABLE(usb, usb_ids);
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#define FW_ZD1211_PREFIX "zd1211/zd1211_"
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#define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
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/* USB device initialization */
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static int request_fw_file(
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const struct firmware **fw, const char *name, struct device *device)
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{
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int r;
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dev_dbg_f(device, "fw name %s\n", name);
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r = request_firmware(fw, name, device);
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if (r)
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dev_err(device,
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"Could not load firmware file %s. Error number %d\n",
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name, r);
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return r;
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}
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static inline u16 get_bcdDevice(const struct usb_device *udev)
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{
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return le16_to_cpu(udev->descriptor.bcdDevice);
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}
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enum upload_code_flags {
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REBOOT = 1,
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};
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/* Ensures that MAX_TRANSFER_SIZE is even. */
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#define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
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static int upload_code(struct usb_device *udev,
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const u8 *data, size_t size, u16 code_offset, int flags)
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{
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u8 *p;
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int r;
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/* USB request blocks need "kmalloced" buffers.
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*/
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p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
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if (!p) {
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dev_err(&udev->dev, "out of memory\n");
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r = -ENOMEM;
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goto error;
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}
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size &= ~1;
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while (size > 0) {
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size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
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size : MAX_TRANSFER_SIZE;
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dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
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memcpy(p, data, transfer_size);
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r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
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USB_REQ_FIRMWARE_DOWNLOAD,
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USB_DIR_OUT | USB_TYPE_VENDOR,
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code_offset, 0, p, transfer_size, 1000 /* ms */);
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if (r < 0) {
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dev_err(&udev->dev,
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"USB control request for firmware upload"
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" failed. Error number %d\n", r);
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goto error;
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}
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transfer_size = r & ~1;
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size -= transfer_size;
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data += transfer_size;
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code_offset += transfer_size/sizeof(u16);
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}
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if (flags & REBOOT) {
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u8 ret;
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r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
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USB_REQ_FIRMWARE_CONFIRM,
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USB_DIR_IN | USB_TYPE_VENDOR,
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0, 0, &ret, sizeof(ret), 5000 /* ms */);
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if (r != sizeof(ret)) {
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dev_err(&udev->dev,
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"control request firmeware confirmation failed."
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" Return value %d\n", r);
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if (r >= 0)
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r = -ENODEV;
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goto error;
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}
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if (ret & 0x80) {
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dev_err(&udev->dev,
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"Internal error while downloading."
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" Firmware confirm return value %#04x\n",
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(unsigned int)ret);
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r = -ENODEV;
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goto error;
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}
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dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
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(unsigned int)ret);
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}
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r = 0;
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error:
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kfree(p);
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return r;
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}
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static u16 get_word(const void *data, u16 offset)
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{
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const __le16 *p = data;
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return le16_to_cpu(p[offset]);
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}
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static char *get_fw_name(char *buffer, size_t size, u8 device_type,
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const char* postfix)
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{
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scnprintf(buffer, size, "%s%s",
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device_type == DEVICE_ZD1211B ?
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FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
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postfix);
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return buffer;
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}
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static int handle_version_mismatch(struct usb_device *udev, u8 device_type,
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const struct firmware *ub_fw)
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{
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const struct firmware *ur_fw = NULL;
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int offset;
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int r = 0;
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char fw_name[128];
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r = request_fw_file(&ur_fw,
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get_fw_name(fw_name, sizeof(fw_name), device_type, "ur"),
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&udev->dev);
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if (r)
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goto error;
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r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT);
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if (r)
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goto error;
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offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16));
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r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
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E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT);
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/* At this point, the vendor driver downloads the whole firmware
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* image, hacks around with version IDs, and uploads it again,
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* completely overwriting the boot code. We do not do this here as
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* it is not required on any tested devices, and it is suspected to
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* cause problems. */
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error:
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release_firmware(ur_fw);
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return r;
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}
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static int upload_firmware(struct usb_device *udev, u8 device_type)
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{
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int r;
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u16 fw_bcdDevice;
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u16 bcdDevice;
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const struct firmware *ub_fw = NULL;
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const struct firmware *uph_fw = NULL;
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char fw_name[128];
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bcdDevice = get_bcdDevice(udev);
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r = request_fw_file(&ub_fw,
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get_fw_name(fw_name, sizeof(fw_name), device_type, "ub"),
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&udev->dev);
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if (r)
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goto error;
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fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET);
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if (fw_bcdDevice != bcdDevice) {
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dev_info(&udev->dev,
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"firmware version %#06x and device bootcode version "
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"%#06x differ\n", fw_bcdDevice, bcdDevice);
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if (bcdDevice <= 0x4313)
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dev_warn(&udev->dev, "device has old bootcode, please "
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"report success or failure\n");
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r = handle_version_mismatch(udev, device_type, ub_fw);
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if (r)
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goto error;
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} else {
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dev_dbg_f(&udev->dev,
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"firmware device id %#06x is equal to the "
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"actual device id\n", fw_bcdDevice);
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}
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r = request_fw_file(&uph_fw,
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get_fw_name(fw_name, sizeof(fw_name), device_type, "uphr"),
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&udev->dev);
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if (r)
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goto error;
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r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT);
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if (r) {
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dev_err(&udev->dev,
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"Could not upload firmware code uph. Error number %d\n",
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r);
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}
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/* FALL-THROUGH */
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error:
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release_firmware(ub_fw);
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release_firmware(uph_fw);
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return r;
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}
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#define urb_dev(urb) (&(urb)->dev->dev)
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static inline void handle_regs_int(struct urb *urb)
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{
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struct zd_usb *usb = urb->context;
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struct zd_usb_interrupt *intr = &usb->intr;
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int len;
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ZD_ASSERT(in_interrupt());
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spin_lock(&intr->lock);
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if (intr->read_regs_enabled) {
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intr->read_regs.length = len = urb->actual_length;
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if (len > sizeof(intr->read_regs.buffer))
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len = sizeof(intr->read_regs.buffer);
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memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
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intr->read_regs_enabled = 0;
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complete(&intr->read_regs.completion);
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goto out;
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}
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dev_dbg_f(urb_dev(urb), "regs interrupt ignored\n");
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out:
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spin_unlock(&intr->lock);
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}
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static inline void handle_retry_failed_int(struct urb *urb)
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{
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struct zd_usb *usb = urb->context;
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struct zd_mac *mac = zd_usb_to_mac(usb);
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struct ieee80211_device *ieee = zd_mac_to_ieee80211(mac);
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ieee->stats.tx_errors++;
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ieee->ieee_stats.tx_retry_limit_exceeded++;
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dev_dbg_f(urb_dev(urb), "retry failed interrupt\n");
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}
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static void int_urb_complete(struct urb *urb)
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{
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int r;
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struct usb_int_header *hdr;
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switch (urb->status) {
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case 0:
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break;
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case -ESHUTDOWN:
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case -EINVAL:
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case -ENODEV:
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case -ENOENT:
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case -ECONNRESET:
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case -EPIPE:
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goto kfree;
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default:
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goto resubmit;
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}
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if (urb->actual_length < sizeof(hdr)) {
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dev_dbg_f(urb_dev(urb), "error: urb %p to small\n", urb);
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goto resubmit;
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}
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hdr = urb->transfer_buffer;
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if (hdr->type != USB_INT_TYPE) {
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dev_dbg_f(urb_dev(urb), "error: urb %p wrong type\n", urb);
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goto resubmit;
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}
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switch (hdr->id) {
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case USB_INT_ID_REGS:
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handle_regs_int(urb);
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break;
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case USB_INT_ID_RETRY_FAILED:
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handle_retry_failed_int(urb);
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break;
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default:
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dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb,
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(unsigned int)hdr->id);
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goto resubmit;
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}
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resubmit:
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r = usb_submit_urb(urb, GFP_ATOMIC);
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if (r) {
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dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
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goto kfree;
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}
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return;
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kfree:
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kfree(urb->transfer_buffer);
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}
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|
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static inline int int_urb_interval(struct usb_device *udev)
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{
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switch (udev->speed) {
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case USB_SPEED_HIGH:
|
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return 4;
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case USB_SPEED_LOW:
|
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return 10;
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case USB_SPEED_FULL:
|
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default:
|
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return 1;
|
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}
|
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}
|
|
|
|
static inline int usb_int_enabled(struct zd_usb *usb)
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{
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unsigned long flags;
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struct zd_usb_interrupt *intr = &usb->intr;
|
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struct urb *urb;
|
|
|
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spin_lock_irqsave(&intr->lock, flags);
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urb = intr->urb;
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spin_unlock_irqrestore(&intr->lock, flags);
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return urb != NULL;
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}
|
|
|
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int zd_usb_enable_int(struct zd_usb *usb)
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{
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int r;
|
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struct usb_device *udev;
|
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struct zd_usb_interrupt *intr = &usb->intr;
|
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void *transfer_buffer = NULL;
|
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struct urb *urb;
|
|
|
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dev_dbg_f(zd_usb_dev(usb), "\n");
|
|
|
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urb = usb_alloc_urb(0, GFP_KERNEL);
|
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if (!urb) {
|
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r = -ENOMEM;
|
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goto out;
|
|
}
|
|
|
|
ZD_ASSERT(!irqs_disabled());
|
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spin_lock_irq(&intr->lock);
|
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if (intr->urb) {
|
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spin_unlock_irq(&intr->lock);
|
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r = 0;
|
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goto error_free_urb;
|
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}
|
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intr->urb = urb;
|
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spin_unlock_irq(&intr->lock);
|
|
|
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/* TODO: make it a DMA buffer */
|
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r = -ENOMEM;
|
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transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_KERNEL);
|
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if (!transfer_buffer) {
|
|
dev_dbg_f(zd_usb_dev(usb),
|
|
"couldn't allocate transfer_buffer\n");
|
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goto error_set_urb_null;
|
|
}
|
|
|
|
udev = zd_usb_to_usbdev(usb);
|
|
usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
|
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transfer_buffer, USB_MAX_EP_INT_BUFFER,
|
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int_urb_complete, usb,
|
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intr->interval);
|
|
|
|
dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
|
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r = usb_submit_urb(urb, GFP_KERNEL);
|
|
if (r) {
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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;
|
|
}
|
|
|
|
static int probe(struct usb_interface *intf, const struct usb_device_id *id)
|
|
{
|
|
int r;
|
|
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;
|
|
}
|
|
|
|
r = upload_firmware(udev, id->driver_info);
|
|
if (r) {
|
|
dev_err(&intf->dev,
|
|
"couldn't load firmware. Error number %d\n", r);
|
|
goto error;
|
|
}
|
|
|
|
r = usb_reset_configuration(udev);
|
|
if (r) {
|
|
dev_dbg_f(&intf->dev,
|
|
"couldn't reset configuration. Error number %d\n", r);
|
|
goto error;
|
|
}
|
|
|
|
/* At this point the interrupt endpoint is not generally enabled. We
|
|
* save the USB bandwidth until the network device is opened. But
|
|
* notify that the initialization of the MAC will require the
|
|
* interrupts to be temporary enabled.
|
|
*/
|
|
r = zd_mac_init_hw(zd_netdev_mac(netdev), id->driver_info);
|
|
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;
|
|
}
|