2031 lines
50 KiB
C
2031 lines
50 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* ZD1211 USB-WLAN driver for Linux
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*
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* Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
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* Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
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* Copyright (C) 2006-2007 Michael Wu <flamingice@sourmilk.net>
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*/
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#include <linux/kernel.h>
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#include <linux/init.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/slab.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 <linux/module.h>
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#include <net/mac80211.h>
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#include <asm/unaligned.h>
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#include "zd_def.h"
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#include "zd_mac.h"
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#include "zd_usb.h"
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static const struct usb_device_id usb_ids[] = {
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/* ZD1211 */
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{ USB_DEVICE(0x0105, 0x145f), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0586, 0x3407), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0ace, 0xa211), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x0df6, 0x9075), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x129b, 0x1666), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x13b1, 0x001e), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x14ea, 0xab10), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x157e, 0x300a), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x157e, 0x3207), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 },
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{ USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 },
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/* ZD1211B */
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{ USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0409, 0x0248), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x054c, 0x0257), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x07fa, 0x1196), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x083a, 0xe501), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x083a, 0xe503), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0ace, 0xb215), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x0df6, 0x0036), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B },
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{ USB_DEVICE(0x2019, 0xed01), .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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{ USB_DEVICE(0x0ace, 0x20ff), .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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static bool check_read_regs(struct zd_usb *usb, struct usb_req_read_regs *req,
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unsigned int count);
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/* USB device initialization */
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static void int_urb_complete(struct urb *urb);
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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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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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/* Use "DMA-aware" buffer. */
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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, p, 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 firmware 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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ret = p[0];
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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(struct zd_usb *usb, char *buffer, size_t size,
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const char* postfix)
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{
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scnprintf(buffer, size, "%s%s",
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usb->is_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 zd_usb *usb,
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const struct firmware *ub_fw)
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{
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struct usb_device *udev = zd_usb_to_usbdev(usb);
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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(usb, fw_name, sizeof(fw_name), "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 zd_usb *usb)
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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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struct usb_device *udev = zd_usb_to_usbdev(usb);
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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(usb, fw_name, sizeof(fw_name), "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(usb, 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(usb, fw_name, sizeof(fw_name), "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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MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ur");
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MODULE_FIRMWARE(FW_ZD1211_PREFIX "ur");
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MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ub");
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MODULE_FIRMWARE(FW_ZD1211_PREFIX "ub");
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MODULE_FIRMWARE(FW_ZD1211B_PREFIX "uphr");
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MODULE_FIRMWARE(FW_ZD1211_PREFIX "uphr");
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/* Read data from device address space using "firmware interface" which does
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* not require firmware to be loaded. */
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int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len)
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{
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int r;
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struct usb_device *udev = zd_usb_to_usbdev(usb);
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u8 *buf;
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/* Use "DMA-aware" buffer. */
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buf = kmalloc(len, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
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USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0,
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buf, len, 5000);
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if (r < 0) {
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dev_err(&udev->dev,
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"read over firmware interface failed: %d\n", r);
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goto exit;
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} else if (r != len) {
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dev_err(&udev->dev,
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"incomplete read over firmware interface: %d/%d\n",
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r, len);
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r = -EIO;
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goto exit;
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}
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r = 0;
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memcpy(data, buf, len);
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exit:
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kfree(buf);
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return r;
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}
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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_override(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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unsigned long flags;
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|
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spin_lock_irqsave(&intr->lock, flags);
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if (atomic_read(&intr->read_regs_enabled)) {
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atomic_set(&intr->read_regs_enabled, 0);
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intr->read_regs_int_overridden = 1;
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complete(&intr->read_regs.completion);
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}
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spin_unlock_irqrestore(&intr->lock, flags);
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}
|
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|
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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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unsigned long flags;
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int len;
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u16 int_num;
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|
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spin_lock_irqsave(&intr->lock, flags);
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|
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int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2));
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if (int_num == CR_INTERRUPT) {
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struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context));
|
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spin_lock(&mac->lock);
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memcpy(&mac->intr_buffer, urb->transfer_buffer,
|
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USB_MAX_EP_INT_BUFFER);
|
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spin_unlock(&mac->lock);
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schedule_work(&mac->process_intr);
|
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} else if (atomic_read(&intr->read_regs_enabled)) {
|
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len = urb->actual_length;
|
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intr->read_regs.length = 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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|
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memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
|
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|
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/* Sometimes USB_INT_ID_REGS is not overridden, but comes after
|
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* USB_INT_ID_RETRY_FAILED. Read-reg retry then gets this
|
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* delayed USB_INT_ID_REGS, but leaves USB_INT_ID_REGS of
|
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* retry unhandled. Next read-reg command then might catch
|
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* this wrong USB_INT_ID_REGS. Fix by ignoring wrong reads.
|
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*/
|
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if (!check_read_regs(usb, intr->read_regs.req,
|
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intr->read_regs.req_count))
|
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goto out;
|
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|
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atomic_set(&intr->read_regs_enabled, 0);
|
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intr->read_regs_int_overridden = 0;
|
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complete(&intr->read_regs.completion);
|
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|
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goto out;
|
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}
|
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|
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out:
|
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spin_unlock_irqrestore(&intr->lock, flags);
|
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|
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/* CR_INTERRUPT might override read_reg too. */
|
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if (int_num == CR_INTERRUPT && atomic_read(&intr->read_regs_enabled))
|
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handle_regs_int_override(urb);
|
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}
|
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|
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static void int_urb_complete(struct urb *urb)
|
|
{
|
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int r;
|
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struct usb_int_header *hdr;
|
|
struct zd_usb *usb;
|
|
struct zd_usb_interrupt *intr;
|
|
|
|
switch (urb->status) {
|
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case 0:
|
|
break;
|
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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);
|
|
return;
|
|
default:
|
|
dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
|
|
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;
|
|
}
|
|
|
|
/* USB_INT_ID_RETRY_FAILED triggered by tx-urb submit can override
|
|
* pending USB_INT_ID_REGS causing read command timeout.
|
|
*/
|
|
usb = urb->context;
|
|
intr = &usb->intr;
|
|
if (hdr->id != USB_INT_ID_REGS && atomic_read(&intr->read_regs_enabled))
|
|
handle_regs_int_override(urb);
|
|
|
|
switch (hdr->id) {
|
|
case USB_INT_ID_REGS:
|
|
handle_regs_int(urb);
|
|
break;
|
|
case USB_INT_ID_RETRY_FAILED:
|
|
zd_mac_tx_failed(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), "error: resubmit urb %p err code %d\n",
|
|
urb, r);
|
|
/* TODO: add worker to reset intr->urb */
|
|
}
|
|
return;
|
|
}
|
|
|
|
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 = zd_usb_to_usbdev(usb);
|
|
struct zd_usb_interrupt *intr = &usb->intr;
|
|
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);
|
|
|
|
r = -ENOMEM;
|
|
intr->buffer = usb_alloc_coherent(udev, USB_MAX_EP_INT_BUFFER,
|
|
GFP_KERNEL, &intr->buffer_dma);
|
|
if (!intr->buffer) {
|
|
dev_dbg_f(zd_usb_dev(usb),
|
|
"couldn't allocate transfer_buffer\n");
|
|
goto error_set_urb_null;
|
|
}
|
|
|
|
usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
|
|
intr->buffer, USB_MAX_EP_INT_BUFFER,
|
|
int_urb_complete, usb,
|
|
intr->interval);
|
|
urb->transfer_dma = intr->buffer_dma;
|
|
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
|
|
|
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:
|
|
usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER,
|
|
intr->buffer, intr->buffer_dma);
|
|
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 usb_device *udev = zd_usb_to_usbdev(usb);
|
|
struct zd_usb_interrupt *intr = &usb->intr;
|
|
struct urb *urb;
|
|
void *buffer;
|
|
dma_addr_t buffer_dma;
|
|
|
|
spin_lock_irqsave(&intr->lock, flags);
|
|
urb = intr->urb;
|
|
if (!urb) {
|
|
spin_unlock_irqrestore(&intr->lock, flags);
|
|
return;
|
|
}
|
|
intr->urb = NULL;
|
|
buffer = intr->buffer;
|
|
buffer_dma = intr->buffer_dma;
|
|
intr->buffer = 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);
|
|
|
|
usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER, buffer, buffer_dma);
|
|
}
|
|
|
|
static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
|
|
unsigned int length)
|
|
{
|
|
int i;
|
|
const struct rx_length_info *length_info;
|
|
|
|
if (length < sizeof(struct rx_length_info)) {
|
|
/* It's not a complete packet anyhow. */
|
|
dev_dbg_f(zd_usb_dev(usb), "invalid, small RX packet : %d\n",
|
|
length);
|
|
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_le16(&length_info->tag) == RX_LENGTH_INFO_TAG)
|
|
{
|
|
unsigned int l, k, n;
|
|
for (i = 0, l = 0;; i++) {
|
|
k = get_unaligned_le16(&length_info->length[i]);
|
|
if (k == 0)
|
|
return;
|
|
n = l+k;
|
|
if (n > length)
|
|
return;
|
|
zd_mac_rx(zd_usb_to_hw(usb), buffer+l, k);
|
|
if (i >= 2)
|
|
return;
|
|
l = (n+3) & ~3;
|
|
}
|
|
} else {
|
|
zd_mac_rx(zd_usb_to_hw(usb), buffer, length);
|
|
}
|
|
}
|
|
|
|
static void rx_urb_complete(struct urb *urb)
|
|
{
|
|
int r;
|
|
struct zd_usb *usb;
|
|
struct zd_usb_rx *rx;
|
|
const u8 *buffer;
|
|
unsigned int length;
|
|
unsigned long flags;
|
|
|
|
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);
|
|
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;
|
|
|
|
tasklet_schedule(&rx->reset_timer_tasklet);
|
|
|
|
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_irqsave(&rx->lock, flags);
|
|
memcpy(rx->fragment, buffer, length);
|
|
rx->fragment_length = length;
|
|
spin_unlock_irqrestore(&rx->lock, flags);
|
|
goto resubmit;
|
|
}
|
|
|
|
spin_lock_irqsave(&rx->lock, flags);
|
|
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_irqrestore(&rx->lock, flags);
|
|
} else {
|
|
spin_unlock_irqrestore(&rx->lock, flags);
|
|
handle_rx_packet(usb, buffer, length);
|
|
}
|
|
|
|
resubmit:
|
|
r = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (r)
|
|
dev_dbg_f(urb_dev(urb), "urb %p resubmit error %d\n", urb, r);
|
|
}
|
|
|
|
static struct urb *alloc_rx_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_alloc_coherent(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_rx_urb(struct urb *urb)
|
|
{
|
|
if (!urb)
|
|
return;
|
|
usb_free_coherent(urb->dev, urb->transfer_buffer_length,
|
|
urb->transfer_buffer, urb->transfer_dma);
|
|
usb_free_urb(urb);
|
|
}
|
|
|
|
static 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(RX_URBS_COUNT, sizeof(struct urb *), GFP_KERNEL);
|
|
if (!urbs)
|
|
goto error;
|
|
for (i = 0; i < RX_URBS_COUNT; i++) {
|
|
urbs[i] = alloc_rx_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 = RX_URBS_COUNT;
|
|
spin_unlock_irq(&rx->lock);
|
|
|
|
for (i = 0; i < RX_URBS_COUNT; i++) {
|
|
r = usb_submit_urb(urbs[i], GFP_KERNEL);
|
|
if (r)
|
|
goto error_submit;
|
|
}
|
|
|
|
return 0;
|
|
error_submit:
|
|
for (i = 0; i < RX_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 < RX_URBS_COUNT; i++)
|
|
free_rx_urb(urbs[i]);
|
|
}
|
|
return r;
|
|
}
|
|
|
|
int zd_usb_enable_rx(struct zd_usb *usb)
|
|
{
|
|
int r;
|
|
struct zd_usb_rx *rx = &usb->rx;
|
|
|
|
mutex_lock(&rx->setup_mutex);
|
|
r = __zd_usb_enable_rx(usb);
|
|
mutex_unlock(&rx->setup_mutex);
|
|
|
|
zd_usb_reset_rx_idle_timer(usb);
|
|
|
|
return r;
|
|
}
|
|
|
|
static 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_rx_urb(urbs[i]);
|
|
}
|
|
kfree(urbs);
|
|
|
|
spin_lock_irqsave(&rx->lock, flags);
|
|
rx->urbs = NULL;
|
|
rx->urbs_count = 0;
|
|
spin_unlock_irqrestore(&rx->lock, flags);
|
|
}
|
|
|
|
void zd_usb_disable_rx(struct zd_usb *usb)
|
|
{
|
|
struct zd_usb_rx *rx = &usb->rx;
|
|
|
|
mutex_lock(&rx->setup_mutex);
|
|
__zd_usb_disable_rx(usb);
|
|
mutex_unlock(&rx->setup_mutex);
|
|
|
|
tasklet_kill(&rx->reset_timer_tasklet);
|
|
cancel_delayed_work_sync(&rx->idle_work);
|
|
}
|
|
|
|
static void zd_usb_reset_rx(struct zd_usb *usb)
|
|
{
|
|
bool do_reset;
|
|
struct zd_usb_rx *rx = &usb->rx;
|
|
unsigned long flags;
|
|
|
|
mutex_lock(&rx->setup_mutex);
|
|
|
|
spin_lock_irqsave(&rx->lock, flags);
|
|
do_reset = rx->urbs != NULL;
|
|
spin_unlock_irqrestore(&rx->lock, flags);
|
|
|
|
if (do_reset) {
|
|
__zd_usb_disable_rx(usb);
|
|
__zd_usb_enable_rx(usb);
|
|
}
|
|
|
|
mutex_unlock(&rx->setup_mutex);
|
|
|
|
if (do_reset)
|
|
zd_usb_reset_rx_idle_timer(usb);
|
|
}
|
|
|
|
/**
|
|
* zd_usb_disable_tx - disable transmission
|
|
* @usb: the zd1211rw-private USB structure
|
|
*
|
|
* Frees all URBs in the free list and marks the transmission as disabled.
|
|
*/
|
|
void zd_usb_disable_tx(struct zd_usb *usb)
|
|
{
|
|
struct zd_usb_tx *tx = &usb->tx;
|
|
unsigned long flags;
|
|
|
|
atomic_set(&tx->enabled, 0);
|
|
|
|
/* kill all submitted tx-urbs */
|
|
usb_kill_anchored_urbs(&tx->submitted);
|
|
|
|
spin_lock_irqsave(&tx->lock, flags);
|
|
WARN_ON(!skb_queue_empty(&tx->submitted_skbs));
|
|
WARN_ON(tx->submitted_urbs != 0);
|
|
tx->submitted_urbs = 0;
|
|
spin_unlock_irqrestore(&tx->lock, flags);
|
|
|
|
/* The stopped state is ignored, relying on ieee80211_wake_queues()
|
|
* in a potentionally following zd_usb_enable_tx().
|
|
*/
|
|
}
|
|
|
|
/**
|
|
* zd_usb_enable_tx - enables transmission
|
|
* @usb: a &struct zd_usb pointer
|
|
*
|
|
* This function enables transmission and prepares the &zd_usb_tx data
|
|
* structure.
|
|
*/
|
|
void zd_usb_enable_tx(struct zd_usb *usb)
|
|
{
|
|
unsigned long flags;
|
|
struct zd_usb_tx *tx = &usb->tx;
|
|
|
|
spin_lock_irqsave(&tx->lock, flags);
|
|
atomic_set(&tx->enabled, 1);
|
|
tx->submitted_urbs = 0;
|
|
ieee80211_wake_queues(zd_usb_to_hw(usb));
|
|
tx->stopped = 0;
|
|
spin_unlock_irqrestore(&tx->lock, flags);
|
|
}
|
|
|
|
static void tx_dec_submitted_urbs(struct zd_usb *usb)
|
|
{
|
|
struct zd_usb_tx *tx = &usb->tx;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&tx->lock, flags);
|
|
--tx->submitted_urbs;
|
|
if (tx->stopped && tx->submitted_urbs <= ZD_USB_TX_LOW) {
|
|
ieee80211_wake_queues(zd_usb_to_hw(usb));
|
|
tx->stopped = 0;
|
|
}
|
|
spin_unlock_irqrestore(&tx->lock, flags);
|
|
}
|
|
|
|
static void tx_inc_submitted_urbs(struct zd_usb *usb)
|
|
{
|
|
struct zd_usb_tx *tx = &usb->tx;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&tx->lock, flags);
|
|
++tx->submitted_urbs;
|
|
if (!tx->stopped && tx->submitted_urbs > ZD_USB_TX_HIGH) {
|
|
ieee80211_stop_queues(zd_usb_to_hw(usb));
|
|
tx->stopped = 1;
|
|
}
|
|
spin_unlock_irqrestore(&tx->lock, flags);
|
|
}
|
|
|
|
/**
|
|
* tx_urb_complete - completes the execution of an URB
|
|
* @urb: a URB
|
|
*
|
|
* This function is called if the URB has been transferred to a device or an
|
|
* error has happened.
|
|
*/
|
|
static void tx_urb_complete(struct urb *urb)
|
|
{
|
|
int r;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_tx_info *info;
|
|
struct zd_usb *usb;
|
|
struct zd_usb_tx *tx;
|
|
|
|
skb = (struct sk_buff *)urb->context;
|
|
info = IEEE80211_SKB_CB(skb);
|
|
/*
|
|
* grab 'usb' pointer before handing off the skb (since
|
|
* it might be freed by zd_mac_tx_to_dev or mac80211)
|
|
*/
|
|
usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb;
|
|
tx = &usb->tx;
|
|
|
|
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:
|
|
skb_unlink(skb, &usb->tx.submitted_skbs);
|
|
zd_mac_tx_to_dev(skb, urb->status);
|
|
usb_free_urb(urb);
|
|
tx_dec_submitted_urbs(usb);
|
|
return;
|
|
resubmit:
|
|
usb_anchor_urb(urb, &tx->submitted);
|
|
r = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (r) {
|
|
usb_unanchor_urb(urb);
|
|
dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
|
|
goto free_urb;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* zd_usb_tx: initiates transfer of a frame of the device
|
|
*
|
|
* @usb: the zd1211rw-private USB structure
|
|
* @skb: a &struct sk_buff pointer
|
|
*
|
|
* This function tranmits a frame to the device. It doesn't wait for
|
|
* completion. The frame must contain the control set and have all the
|
|
* control set information available.
|
|
*
|
|
* The function returns 0 if the transfer has been successfully initiated.
|
|
*/
|
|
int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb)
|
|
{
|
|
int r;
|
|
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
|
|
struct usb_device *udev = zd_usb_to_usbdev(usb);
|
|
struct urb *urb;
|
|
struct zd_usb_tx *tx = &usb->tx;
|
|
|
|
if (!atomic_read(&tx->enabled)) {
|
|
r = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
urb = usb_alloc_urb(0, GFP_ATOMIC);
|
|
if (!urb) {
|
|
r = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
|
|
skb->data, skb->len, tx_urb_complete, skb);
|
|
|
|
info->rate_driver_data[1] = (void *)jiffies;
|
|
skb_queue_tail(&tx->submitted_skbs, skb);
|
|
usb_anchor_urb(urb, &tx->submitted);
|
|
|
|
r = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (r) {
|
|
dev_dbg_f(zd_usb_dev(usb), "error submit urb %p %d\n", urb, r);
|
|
usb_unanchor_urb(urb);
|
|
skb_unlink(skb, &tx->submitted_skbs);
|
|
goto error;
|
|
}
|
|
tx_inc_submitted_urbs(usb);
|
|
return 0;
|
|
error:
|
|
usb_free_urb(urb);
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
static bool zd_tx_timeout(struct zd_usb *usb)
|
|
{
|
|
struct zd_usb_tx *tx = &usb->tx;
|
|
struct sk_buff_head *q = &tx->submitted_skbs;
|
|
struct sk_buff *skb, *skbnext;
|
|
struct ieee80211_tx_info *info;
|
|
unsigned long flags, trans_start;
|
|
bool have_timedout = false;
|
|
|
|
spin_lock_irqsave(&q->lock, flags);
|
|
skb_queue_walk_safe(q, skb, skbnext) {
|
|
info = IEEE80211_SKB_CB(skb);
|
|
trans_start = (unsigned long)info->rate_driver_data[1];
|
|
|
|
if (time_is_before_jiffies(trans_start + ZD_TX_TIMEOUT)) {
|
|
have_timedout = true;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&q->lock, flags);
|
|
|
|
return have_timedout;
|
|
}
|
|
|
|
static void zd_tx_watchdog_handler(struct work_struct *work)
|
|
{
|
|
struct zd_usb *usb =
|
|
container_of(work, struct zd_usb, tx.watchdog_work.work);
|
|
struct zd_usb_tx *tx = &usb->tx;
|
|
|
|
if (!atomic_read(&tx->enabled) || !tx->watchdog_enabled)
|
|
goto out;
|
|
if (!zd_tx_timeout(usb))
|
|
goto out;
|
|
|
|
/* TX halted, try reset */
|
|
dev_warn(zd_usb_dev(usb), "TX-stall detected, resetting device...");
|
|
|
|
usb_queue_reset_device(usb->intf);
|
|
|
|
/* reset will stop this worker, don't rearm */
|
|
return;
|
|
out:
|
|
queue_delayed_work(zd_workqueue, &tx->watchdog_work,
|
|
ZD_TX_WATCHDOG_INTERVAL);
|
|
}
|
|
|
|
void zd_tx_watchdog_enable(struct zd_usb *usb)
|
|
{
|
|
struct zd_usb_tx *tx = &usb->tx;
|
|
|
|
if (!tx->watchdog_enabled) {
|
|
dev_dbg_f(zd_usb_dev(usb), "\n");
|
|
queue_delayed_work(zd_workqueue, &tx->watchdog_work,
|
|
ZD_TX_WATCHDOG_INTERVAL);
|
|
tx->watchdog_enabled = 1;
|
|
}
|
|
}
|
|
|
|
void zd_tx_watchdog_disable(struct zd_usb *usb)
|
|
{
|
|
struct zd_usb_tx *tx = &usb->tx;
|
|
|
|
if (tx->watchdog_enabled) {
|
|
dev_dbg_f(zd_usb_dev(usb), "\n");
|
|
tx->watchdog_enabled = 0;
|
|
cancel_delayed_work_sync(&tx->watchdog_work);
|
|
}
|
|
}
|
|
|
|
static void zd_rx_idle_timer_handler(struct work_struct *work)
|
|
{
|
|
struct zd_usb *usb =
|
|
container_of(work, struct zd_usb, rx.idle_work.work);
|
|
struct zd_mac *mac = zd_usb_to_mac(usb);
|
|
|
|
if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags))
|
|
return;
|
|
|
|
dev_dbg_f(zd_usb_dev(usb), "\n");
|
|
|
|
/* 30 seconds since last rx, reset rx */
|
|
zd_usb_reset_rx(usb);
|
|
}
|
|
|
|
static void zd_usb_reset_rx_idle_timer_tasklet(struct tasklet_struct *t)
|
|
{
|
|
struct zd_usb *usb = from_tasklet(usb, t, rx.reset_timer_tasklet);
|
|
|
|
zd_usb_reset_rx_idle_timer(usb);
|
|
}
|
|
|
|
void zd_usb_reset_rx_idle_timer(struct zd_usb *usb)
|
|
{
|
|
struct zd_usb_rx *rx = &usb->rx;
|
|
|
|
mod_delayed_work(zd_workqueue, &rx->idle_work, ZD_RX_IDLE_INTERVAL);
|
|
}
|
|
|
|
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);
|
|
atomic_set(&intr->read_regs_enabled, 0);
|
|
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);
|
|
mutex_init(&rx->setup_mutex);
|
|
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);
|
|
INIT_DELAYED_WORK(&rx->idle_work, zd_rx_idle_timer_handler);
|
|
rx->reset_timer_tasklet.func = (void (*))
|
|
zd_usb_reset_rx_idle_timer_tasklet;
|
|
rx->reset_timer_tasklet.data = (unsigned long)&rx->reset_timer_tasklet;
|
|
}
|
|
|
|
static inline void init_usb_tx(struct zd_usb *usb)
|
|
{
|
|
struct zd_usb_tx *tx = &usb->tx;
|
|
|
|
spin_lock_init(&tx->lock);
|
|
atomic_set(&tx->enabled, 0);
|
|
tx->stopped = 0;
|
|
skb_queue_head_init(&tx->submitted_skbs);
|
|
init_usb_anchor(&tx->submitted);
|
|
tx->submitted_urbs = 0;
|
|
tx->watchdog_enabled = 0;
|
|
INIT_DELAYED_WORK(&tx->watchdog_work, zd_tx_watchdog_handler);
|
|
}
|
|
|
|
void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
|
|
struct usb_interface *intf)
|
|
{
|
|
memset(usb, 0, sizeof(*usb));
|
|
usb->intf = usb_get_intf(intf);
|
|
usb_set_intfdata(usb->intf, hw);
|
|
init_usb_anchor(&usb->submitted_cmds);
|
|
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->cur_altsetting;
|
|
struct usb_endpoint_descriptor *endpoint;
|
|
unsigned char *cmd;
|
|
u8 bulk_out_ep;
|
|
int r;
|
|
|
|
if (iface_desc->desc.bNumEndpoints < 2)
|
|
return -ENODEV;
|
|
|
|
/* Find bulk out endpoint */
|
|
for (r = 1; r >= 0; r--) {
|
|
endpoint = &iface_desc->endpoint[r].desc;
|
|
if (usb_endpoint_dir_out(endpoint) &&
|
|
usb_endpoint_xfer_bulk(endpoint)) {
|
|
bulk_out_ep = endpoint->bEndpointAddress;
|
|
break;
|
|
}
|
|
}
|
|
if (r == -1) {
|
|
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->hw);
|
|
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 usb_device *udev = interface_to_usbdev(intf);
|
|
struct zd_usb *usb;
|
|
struct ieee80211_hw *hw = 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;
|
|
}
|
|
|
|
r = usb_reset_device(udev);
|
|
if (r) {
|
|
dev_err(&intf->dev,
|
|
"couldn't reset usb device. Error number %d\n", r);
|
|
goto error;
|
|
}
|
|
|
|
hw = zd_mac_alloc_hw(intf);
|
|
if (hw == NULL) {
|
|
r = -ENOMEM;
|
|
goto error;
|
|
}
|
|
|
|
usb = &zd_hw_mac(hw)->chip.usb;
|
|
usb->is_zd1211b = (id->driver_info == DEVICE_ZD1211B) != 0;
|
|
|
|
r = zd_mac_preinit_hw(hw);
|
|
if (r) {
|
|
dev_dbg_f(&intf->dev,
|
|
"couldn't initialize mac. Error number %d\n", r);
|
|
goto error;
|
|
}
|
|
|
|
r = ieee80211_register_hw(hw);
|
|
if (r) {
|
|
dev_dbg_f(&intf->dev,
|
|
"couldn't register device. Error number %d\n", r);
|
|
goto error;
|
|
}
|
|
|
|
dev_dbg_f(&intf->dev, "successful\n");
|
|
dev_info(&intf->dev, "%s\n", wiphy_name(hw->wiphy));
|
|
return 0;
|
|
error:
|
|
usb_reset_device(interface_to_usbdev(intf));
|
|
if (hw) {
|
|
zd_mac_clear(zd_hw_mac(hw));
|
|
ieee80211_free_hw(hw);
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static void disconnect(struct usb_interface *intf)
|
|
{
|
|
struct ieee80211_hw *hw = zd_intf_to_hw(intf);
|
|
struct zd_mac *mac;
|
|
struct zd_usb *usb;
|
|
|
|
/* Either something really bad happened, or we're just dealing with
|
|
* a DEVICE_INSTALLER. */
|
|
if (hw == NULL)
|
|
return;
|
|
|
|
mac = zd_hw_mac(hw);
|
|
usb = &mac->chip.usb;
|
|
|
|
dev_dbg_f(zd_usb_dev(usb), "\n");
|
|
|
|
ieee80211_unregister_hw(hw);
|
|
|
|
/* Just in case something has gone wrong! */
|
|
zd_usb_disable_tx(usb);
|
|
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_mac_clear(mac);
|
|
ieee80211_free_hw(hw);
|
|
dev_dbg(&intf->dev, "disconnected\n");
|
|
}
|
|
|
|
static void zd_usb_resume(struct zd_usb *usb)
|
|
{
|
|
struct zd_mac *mac = zd_usb_to_mac(usb);
|
|
int r;
|
|
|
|
dev_dbg_f(zd_usb_dev(usb), "\n");
|
|
|
|
r = zd_op_start(zd_usb_to_hw(usb));
|
|
if (r < 0) {
|
|
dev_warn(zd_usb_dev(usb), "Device resume failed "
|
|
"with error code %d. Retrying...\n", r);
|
|
if (usb->was_running)
|
|
set_bit(ZD_DEVICE_RUNNING, &mac->flags);
|
|
usb_queue_reset_device(usb->intf);
|
|
return;
|
|
}
|
|
|
|
if (mac->type != NL80211_IFTYPE_UNSPECIFIED) {
|
|
r = zd_restore_settings(mac);
|
|
if (r < 0) {
|
|
dev_dbg(zd_usb_dev(usb),
|
|
"failed to restore settings, %d\n", r);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void zd_usb_stop(struct zd_usb *usb)
|
|
{
|
|
dev_dbg_f(zd_usb_dev(usb), "\n");
|
|
|
|
zd_op_stop(zd_usb_to_hw(usb));
|
|
|
|
zd_usb_disable_tx(usb);
|
|
zd_usb_disable_rx(usb);
|
|
zd_usb_disable_int(usb);
|
|
|
|
usb->initialized = 0;
|
|
}
|
|
|
|
static int pre_reset(struct usb_interface *intf)
|
|
{
|
|
struct ieee80211_hw *hw = usb_get_intfdata(intf);
|
|
struct zd_mac *mac;
|
|
struct zd_usb *usb;
|
|
|
|
if (!hw || intf->condition != USB_INTERFACE_BOUND)
|
|
return 0;
|
|
|
|
mac = zd_hw_mac(hw);
|
|
usb = &mac->chip.usb;
|
|
|
|
usb->was_running = test_bit(ZD_DEVICE_RUNNING, &mac->flags);
|
|
|
|
zd_usb_stop(usb);
|
|
|
|
mutex_lock(&mac->chip.mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int post_reset(struct usb_interface *intf)
|
|
{
|
|
struct ieee80211_hw *hw = usb_get_intfdata(intf);
|
|
struct zd_mac *mac;
|
|
struct zd_usb *usb;
|
|
|
|
if (!hw || intf->condition != USB_INTERFACE_BOUND)
|
|
return 0;
|
|
|
|
mac = zd_hw_mac(hw);
|
|
usb = &mac->chip.usb;
|
|
|
|
mutex_unlock(&mac->chip.mutex);
|
|
|
|
if (usb->was_running)
|
|
zd_usb_resume(usb);
|
|
return 0;
|
|
}
|
|
|
|
static struct usb_driver driver = {
|
|
.name = KBUILD_MODNAME,
|
|
.id_table = usb_ids,
|
|
.probe = probe,
|
|
.disconnect = disconnect,
|
|
.pre_reset = pre_reset,
|
|
.post_reset = post_reset,
|
|
.disable_hub_initiated_lpm = 1,
|
|
};
|
|
|
|
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) {
|
|
pr_err("%s couldn't create workqueue\n", driver.name);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
r = usb_register(&driver);
|
|
if (r) {
|
|
destroy_workqueue(zd_workqueue);
|
|
pr_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 zd_ep_regs_out_msg(struct usb_device *udev, void *data, int len,
|
|
int *actual_length, int timeout)
|
|
{
|
|
/* In USB 2.0 mode EP_REGS_OUT endpoint is interrupt type. However in
|
|
* USB 1.1 mode endpoint is bulk. Select correct type URB by endpoint
|
|
* descriptor.
|
|
*/
|
|
struct usb_host_endpoint *ep;
|
|
unsigned int pipe;
|
|
|
|
pipe = usb_sndintpipe(udev, EP_REGS_OUT);
|
|
ep = usb_pipe_endpoint(udev, pipe);
|
|
if (!ep)
|
|
return -EINVAL;
|
|
|
|
if (usb_endpoint_xfer_int(&ep->desc)) {
|
|
return usb_interrupt_msg(udev, pipe, data, len,
|
|
actual_length, timeout);
|
|
} else {
|
|
pipe = usb_sndbulkpipe(udev, EP_REGS_OUT);
|
|
return usb_bulk_msg(udev, pipe, data, len, actual_length,
|
|
timeout);
|
|
}
|
|
}
|
|
|
|
static void prepare_read_regs_int(struct zd_usb *usb,
|
|
struct usb_req_read_regs *req,
|
|
unsigned int count)
|
|
{
|
|
struct zd_usb_interrupt *intr = &usb->intr;
|
|
|
|
spin_lock_irq(&intr->lock);
|
|
atomic_set(&intr->read_regs_enabled, 1);
|
|
intr->read_regs.req = req;
|
|
intr->read_regs.req_count = count;
|
|
reinit_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);
|
|
atomic_set(&intr->read_regs_enabled, 0);
|
|
spin_unlock_irq(&intr->lock);
|
|
}
|
|
|
|
static bool check_read_regs(struct zd_usb *usb, struct usb_req_read_regs *req,
|
|
unsigned int count)
|
|
{
|
|
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;
|
|
|
|
/* The created block size seems to be larger than expected.
|
|
* However results appear to be correct.
|
|
*/
|
|
if (rr->length < struct_size(regs, regs, count)) {
|
|
dev_dbg_f(zd_usb_dev(usb),
|
|
"error: actual length %d less than expected %zu\n",
|
|
rr->length, struct_size(regs, regs, count));
|
|
return false;
|
|
}
|
|
|
|
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));
|
|
return false;
|
|
}
|
|
|
|
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]));
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static int get_results(struct zd_usb *usb, u16 *values,
|
|
struct usb_req_read_regs *req, unsigned int count,
|
|
bool *retry)
|
|
{
|
|
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;
|
|
|
|
/* Read failed because firmware bug? */
|
|
*retry = !!intr->read_regs_int_overridden;
|
|
if (*retry)
|
|
goto error_unlock;
|
|
|
|
if (!check_read_regs(usb, req, count)) {
|
|
dev_dbg_f(zd_usb_dev(usb), "error: invalid read regs\n");
|
|
goto error_unlock;
|
|
}
|
|
|
|
for (i = 0; i < count; i++) {
|
|
struct reg_data *rd = ®s->regs[i];
|
|
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, i, req_len, actual_req_len, try_count = 0;
|
|
struct usb_device *udev;
|
|
struct usb_req_read_regs *req = NULL;
|
|
unsigned long timeout;
|
|
bool retry = false;
|
|
|
|
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 (!usb_int_enabled(usb)) {
|
|
dev_dbg_f(zd_usb_dev(usb),
|
|
"error: usb interrupt not enabled\n");
|
|
return -EWOULDBLOCK;
|
|
}
|
|
|
|
ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
|
|
BUILD_BUG_ON(sizeof(struct usb_req_read_regs) + USB_MAX_IOREAD16_COUNT *
|
|
sizeof(__le16) > sizeof(usb->req_buf));
|
|
BUG_ON(sizeof(struct usb_req_read_regs) + count * sizeof(__le16) >
|
|
sizeof(usb->req_buf));
|
|
|
|
req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
|
|
req = (void *)usb->req_buf;
|
|
|
|
req->id = cpu_to_le16(USB_REQ_READ_REGS);
|
|
for (i = 0; i < count; i++)
|
|
req->addr[i] = cpu_to_le16((u16)addresses[i]);
|
|
|
|
retry_read:
|
|
try_count++;
|
|
udev = zd_usb_to_usbdev(usb);
|
|
prepare_read_regs_int(usb, req, count);
|
|
r = zd_ep_regs_out_msg(udev, req, req_len, &actual_req_len, 50 /*ms*/);
|
|
if (r) {
|
|
dev_dbg_f(zd_usb_dev(usb),
|
|
"error in zd_ep_regs_out_msg(). Error number %d\n", r);
|
|
goto error;
|
|
}
|
|
if (req_len != actual_req_len) {
|
|
dev_dbg_f(zd_usb_dev(usb), "error in zd_ep_regs_out_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(50));
|
|
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, &retry);
|
|
if (retry && try_count < 20) {
|
|
dev_dbg_f(zd_usb_dev(usb), "read retry, tries so far: %d\n",
|
|
try_count);
|
|
goto retry_read;
|
|
}
|
|
error:
|
|
return r;
|
|
}
|
|
|
|
static void iowrite16v_urb_complete(struct urb *urb)
|
|
{
|
|
struct zd_usb *usb = urb->context;
|
|
|
|
if (urb->status && !usb->cmd_error)
|
|
usb->cmd_error = urb->status;
|
|
|
|
if (!usb->cmd_error &&
|
|
urb->actual_length != urb->transfer_buffer_length)
|
|
usb->cmd_error = -EIO;
|
|
}
|
|
|
|
static int zd_submit_waiting_urb(struct zd_usb *usb, bool last)
|
|
{
|
|
int r = 0;
|
|
struct urb *urb = usb->urb_async_waiting;
|
|
|
|
if (!urb)
|
|
return 0;
|
|
|
|
usb->urb_async_waiting = NULL;
|
|
|
|
if (!last)
|
|
urb->transfer_flags |= URB_NO_INTERRUPT;
|
|
|
|
usb_anchor_urb(urb, &usb->submitted_cmds);
|
|
r = usb_submit_urb(urb, GFP_KERNEL);
|
|
if (r) {
|
|
usb_unanchor_urb(urb);
|
|
dev_dbg_f(zd_usb_dev(usb),
|
|
"error in usb_submit_urb(). Error number %d\n", r);
|
|
goto error;
|
|
}
|
|
|
|
/* fall-through with r == 0 */
|
|
error:
|
|
usb_free_urb(urb);
|
|
return r;
|
|
}
|
|
|
|
void zd_usb_iowrite16v_async_start(struct zd_usb *usb)
|
|
{
|
|
ZD_ASSERT(usb_anchor_empty(&usb->submitted_cmds));
|
|
ZD_ASSERT(usb->urb_async_waiting == NULL);
|
|
ZD_ASSERT(!usb->in_async);
|
|
|
|
ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
|
|
|
|
usb->in_async = 1;
|
|
usb->cmd_error = 0;
|
|
usb->urb_async_waiting = NULL;
|
|
}
|
|
|
|
int zd_usb_iowrite16v_async_end(struct zd_usb *usb, unsigned int timeout)
|
|
{
|
|
int r;
|
|
|
|
ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
|
|
ZD_ASSERT(usb->in_async);
|
|
|
|
/* Submit last iowrite16v URB */
|
|
r = zd_submit_waiting_urb(usb, true);
|
|
if (r) {
|
|
dev_dbg_f(zd_usb_dev(usb),
|
|
"error in zd_submit_waiting_usb(). "
|
|
"Error number %d\n", r);
|
|
|
|
usb_kill_anchored_urbs(&usb->submitted_cmds);
|
|
goto error;
|
|
}
|
|
|
|
if (timeout)
|
|
timeout = usb_wait_anchor_empty_timeout(&usb->submitted_cmds,
|
|
timeout);
|
|
if (!timeout) {
|
|
usb_kill_anchored_urbs(&usb->submitted_cmds);
|
|
if (usb->cmd_error == -ENOENT) {
|
|
dev_dbg_f(zd_usb_dev(usb), "timed out");
|
|
r = -ETIMEDOUT;
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
r = usb->cmd_error;
|
|
error:
|
|
usb->in_async = 0;
|
|
return r;
|
|
}
|
|
|
|
int zd_usb_iowrite16v_async(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;
|
|
struct urb *urb;
|
|
struct usb_host_endpoint *ep;
|
|
|
|
ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
|
|
ZD_ASSERT(usb->in_async);
|
|
|
|
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;
|
|
}
|
|
|
|
udev = zd_usb_to_usbdev(usb);
|
|
|
|
ep = usb_pipe_endpoint(udev, usb_sndintpipe(udev, EP_REGS_OUT));
|
|
if (!ep)
|
|
return -ENOENT;
|
|
|
|
urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!urb)
|
|
return -ENOMEM;
|
|
|
|
req_len = struct_size(req, reg_writes, count);
|
|
req = kmalloc(req_len, GFP_KERNEL);
|
|
if (!req) {
|
|
r = -ENOMEM;
|
|
goto error;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/* In USB 2.0 mode endpoint is interrupt type. However in USB 1.1 mode
|
|
* endpoint is bulk. Select correct type URB by endpoint descriptor.
|
|
*/
|
|
if (usb_endpoint_xfer_int(&ep->desc))
|
|
usb_fill_int_urb(urb, udev, usb_sndintpipe(udev, EP_REGS_OUT),
|
|
req, req_len, iowrite16v_urb_complete, usb,
|
|
ep->desc.bInterval);
|
|
else
|
|
usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
|
|
req, req_len, iowrite16v_urb_complete, usb);
|
|
|
|
urb->transfer_flags |= URB_FREE_BUFFER;
|
|
|
|
/* Submit previous URB */
|
|
r = zd_submit_waiting_urb(usb, false);
|
|
if (r) {
|
|
dev_dbg_f(zd_usb_dev(usb),
|
|
"error in zd_submit_waiting_usb(). "
|
|
"Error number %d\n", r);
|
|
goto error;
|
|
}
|
|
|
|
/* Delay submit so that URB_NO_INTERRUPT flag can be set for all URBs
|
|
* of currect batch except for very last.
|
|
*/
|
|
usb->urb_async_waiting = urb;
|
|
return 0;
|
|
error:
|
|
usb_free_urb(urb);
|
|
return r;
|
|
}
|
|
|
|
int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
|
|
unsigned int count)
|
|
{
|
|
int r;
|
|
|
|
zd_usb_iowrite16v_async_start(usb);
|
|
r = zd_usb_iowrite16v_async(usb, ioreqs, count);
|
|
if (r) {
|
|
zd_usb_iowrite16v_async_end(usb, 0);
|
|
return r;
|
|
}
|
|
return zd_usb_iowrite16v_async_end(usb, 50 /* ms */);
|
|
}
|
|
|
|
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 (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, ZD_CR203);
|
|
if (r) {
|
|
dev_dbg_f(zd_usb_dev(usb),
|
|
"error %d: Couldn't read ZD_CR203\n", r);
|
|
return r;
|
|
}
|
|
bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
|
|
|
|
ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
|
|
BUILD_BUG_ON(sizeof(struct usb_req_rfwrite) +
|
|
USB_MAX_RFWRITE_BIT_COUNT * sizeof(__le16) >
|
|
sizeof(usb->req_buf));
|
|
BUG_ON(sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16) >
|
|
sizeof(usb->req_buf));
|
|
|
|
req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
|
|
req = (void *)usb->req_buf;
|
|
|
|
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 = zd_ep_regs_out_msg(udev, req, req_len, &actual_req_len, 50 /*ms*/);
|
|
if (r) {
|
|
dev_dbg_f(zd_usb_dev(usb),
|
|
"error in zd_ep_regs_out_msg(). Error number %d\n", r);
|
|
goto out;
|
|
}
|
|
if (req_len != actual_req_len) {
|
|
dev_dbg_f(zd_usb_dev(usb), "error in zd_ep_regs_out_msg()"
|
|
" req_len %d != actual_req_len %d\n",
|
|
req_len, actual_req_len);
|
|
r = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
/* FALL-THROUGH with r == 0 */
|
|
out:
|
|
return r;
|
|
}
|