-/* ZD1211 USB-WLAN driver for Linux
- *
- * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
- * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
- * Copyright (C) 2006-2007 Michael Wu <flamingice@sourmilk.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/firmware.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/skbuff.h>
-#include <linux/usb.h>
-#include <linux/workqueue.h>
-#include <linux/module.h>
-#include <net/mac80211.h>
-#include <asm/unaligned.h>
-
-#include "zd_def.h"
-#include "zd_mac.h"
-#include "zd_usb.h"
-
-static struct usb_device_id usb_ids[] = {
- /* ZD1211 */
- { USB_DEVICE(0x0105, 0x145f), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x0586, 0x3401), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x0586, 0x3402), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x0586, 0x3407), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x0586, 0x3409), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x079b, 0x004a), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x0ace, 0x1211), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x0ace, 0xa211), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x0b05, 0x170c), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x0b3b, 0x1630), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x0b3b, 0x5630), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x0df6, 0x9071), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x0df6, 0x9075), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x126f, 0xa006), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x129b, 0x1666), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x13b1, 0x001e), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x1435, 0x0711), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x14ea, 0xab10), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x14ea, 0xab13), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x157e, 0x300a), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x157e, 0x300b), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x157e, 0x3204), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x157e, 0x3207), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x1740, 0x2000), .driver_info = DEVICE_ZD1211 },
- { USB_DEVICE(0x6891, 0xa727), .driver_info = DEVICE_ZD1211 },
- /* ZD1211B */
- { USB_DEVICE(0x0053, 0x5301), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0409, 0x0248), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0411, 0x00da), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0471, 0x1236), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0471, 0x1237), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x050d, 0x705c), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x054c, 0x0257), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0586, 0x340a), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0586, 0x340f), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0586, 0x3410), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0586, 0x3412), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0586, 0x3413), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x079b, 0x0062), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x07b8, 0x6001), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x07fa, 0x1196), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x083a, 0x4505), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x083a, 0xe501), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x083a, 0xe503), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x083a, 0xe506), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0ace, 0x1215), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0ace, 0xb215), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0b05, 0x171b), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0baf, 0x0121), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0cde, 0x001a), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x0df6, 0x0036), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x129b, 0x1667), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x13b1, 0x0024), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x157e, 0x300d), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x1582, 0x6003), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x2019, 0x5303), .driver_info = DEVICE_ZD1211B },
- { USB_DEVICE(0x2019, 0xed01), .driver_info = DEVICE_ZD1211B },
- /* "Driverless" devices that need ejecting */
- { USB_DEVICE(0x0ace, 0x2011), .driver_info = DEVICE_INSTALLER },
- { USB_DEVICE(0x0ace, 0x20ff), .driver_info = DEVICE_INSTALLER },
- {}
-};
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("USB driver for devices with the ZD1211 chip.");
-MODULE_AUTHOR("Ulrich Kunitz");
-MODULE_AUTHOR("Daniel Drake");
-MODULE_VERSION("1.0");
-MODULE_DEVICE_TABLE(usb, usb_ids);
-
-#define FW_ZD1211_PREFIX "zd1211/zd1211_"
-#define FW_ZD1211B_PREFIX "zd1211/zd1211b_"
-
-static bool check_read_regs(struct zd_usb *usb, struct usb_req_read_regs *req,
- unsigned int count);
-
-/* USB device initialization */
-static void int_urb_complete(struct urb *urb);
-
-static int request_fw_file(
- const struct firmware **fw, const char *name, struct device *device)
-{
- int r;
-
- dev_dbg_f(device, "fw name %s\n", name);
-
- r = request_firmware(fw, name, device);
- if (r)
- dev_err(device,
- "Could not load firmware file %s. Error number %d\n",
- name, r);
- return r;
-}
-
-static inline u16 get_bcdDevice(const struct usb_device *udev)
-{
- return le16_to_cpu(udev->descriptor.bcdDevice);
-}
-
-enum upload_code_flags {
- REBOOT = 1,
-};
-
-/* Ensures that MAX_TRANSFER_SIZE is even. */
-#define MAX_TRANSFER_SIZE (USB_MAX_TRANSFER_SIZE & ~1)
-
-static int upload_code(struct usb_device *udev,
- const u8 *data, size_t size, u16 code_offset, int flags)
-{
- u8 *p;
- int r;
-
- /* USB request blocks need "kmalloced" buffers.
- */
- p = kmalloc(MAX_TRANSFER_SIZE, GFP_KERNEL);
- if (!p) {
- r = -ENOMEM;
- goto error;
- }
-
- size &= ~1;
- while (size > 0) {
- size_t transfer_size = size <= MAX_TRANSFER_SIZE ?
- size : MAX_TRANSFER_SIZE;
-
- dev_dbg_f(&udev->dev, "transfer size %zu\n", transfer_size);
-
- memcpy(p, data, transfer_size);
- r = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
- USB_REQ_FIRMWARE_DOWNLOAD,
- USB_DIR_OUT | USB_TYPE_VENDOR,
- code_offset, 0, p, transfer_size, 1000 /* ms */);
- if (r < 0) {
- dev_err(&udev->dev,
- "USB control request for firmware upload"
- " failed. Error number %d\n", r);
- goto error;
- }
- transfer_size = r & ~1;
-
- size -= transfer_size;
- data += transfer_size;
- code_offset += transfer_size/sizeof(u16);
- }
-
- if (flags & REBOOT) {
- u8 ret;
-
- /* Use "DMA-aware" buffer. */
- r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
- USB_REQ_FIRMWARE_CONFIRM,
- USB_DIR_IN | USB_TYPE_VENDOR,
- 0, 0, p, sizeof(ret), 5000 /* ms */);
- if (r != sizeof(ret)) {
- dev_err(&udev->dev,
- "control request firmeware confirmation failed."
- " Return value %d\n", r);
- if (r >= 0)
- r = -ENODEV;
- goto error;
- }
- ret = p[0];
- if (ret & 0x80) {
- dev_err(&udev->dev,
- "Internal error while downloading."
- " Firmware confirm return value %#04x\n",
- (unsigned int)ret);
- r = -ENODEV;
- goto error;
- }
- dev_dbg_f(&udev->dev, "firmware confirm return value %#04x\n",
- (unsigned int)ret);
- }
-
- r = 0;
-error:
- kfree(p);
- return r;
-}
-
-static u16 get_word(const void *data, u16 offset)
-{
- const __le16 *p = data;
- return le16_to_cpu(p[offset]);
-}
-
-static char *get_fw_name(struct zd_usb *usb, char *buffer, size_t size,
- const char* postfix)
-{
- scnprintf(buffer, size, "%s%s",
- usb->is_zd1211b ?
- FW_ZD1211B_PREFIX : FW_ZD1211_PREFIX,
- postfix);
- return buffer;
-}
-
-static int handle_version_mismatch(struct zd_usb *usb,
- const struct firmware *ub_fw)
-{
- struct usb_device *udev = zd_usb_to_usbdev(usb);
- const struct firmware *ur_fw = NULL;
- int offset;
- int r = 0;
- char fw_name[128];
-
- r = request_fw_file(&ur_fw,
- get_fw_name(usb, fw_name, sizeof(fw_name), "ur"),
- &udev->dev);
- if (r)
- goto error;
-
- r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START, REBOOT);
- if (r)
- goto error;
-
- offset = (E2P_BOOT_CODE_OFFSET * sizeof(u16));
- r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset,
- E2P_START + E2P_BOOT_CODE_OFFSET, REBOOT);
-
- /* At this point, the vendor driver downloads the whole firmware
- * image, hacks around with version IDs, and uploads it again,
- * completely overwriting the boot code. We do not do this here as
- * it is not required on any tested devices, and it is suspected to
- * cause problems. */
-error:
- release_firmware(ur_fw);
- return r;
-}
-
-static int upload_firmware(struct zd_usb *usb)
-{
- int r;
- u16 fw_bcdDevice;
- u16 bcdDevice;
- struct usb_device *udev = zd_usb_to_usbdev(usb);
- const struct firmware *ub_fw = NULL;
- const struct firmware *uph_fw = NULL;
- char fw_name[128];
-
- bcdDevice = get_bcdDevice(udev);
-
- r = request_fw_file(&ub_fw,
- get_fw_name(usb, fw_name, sizeof(fw_name), "ub"),
- &udev->dev);
- if (r)
- goto error;
-
- fw_bcdDevice = get_word(ub_fw->data, E2P_DATA_OFFSET);
-
- if (fw_bcdDevice != bcdDevice) {
- dev_info(&udev->dev,
- "firmware version %#06x and device bootcode version "
- "%#06x differ\n", fw_bcdDevice, bcdDevice);
- if (bcdDevice <= 0x4313)
- dev_warn(&udev->dev, "device has old bootcode, please "
- "report success or failure\n");
-
- r = handle_version_mismatch(usb, ub_fw);
- if (r)
- goto error;
- } else {
- dev_dbg_f(&udev->dev,
- "firmware device id %#06x is equal to the "
- "actual device id\n", fw_bcdDevice);
- }
-
-
- r = request_fw_file(&uph_fw,
- get_fw_name(usb, fw_name, sizeof(fw_name), "uphr"),
- &udev->dev);
- if (r)
- goto error;
-
- r = upload_code(udev, uph_fw->data, uph_fw->size, FW_START, REBOOT);
- if (r) {
- dev_err(&udev->dev,
- "Could not upload firmware code uph. Error number %d\n",
- r);
- }
-
- /* FALL-THROUGH */
-error:
- release_firmware(ub_fw);
- release_firmware(uph_fw);
- return r;
-}
-
-MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ur");
-MODULE_FIRMWARE(FW_ZD1211_PREFIX "ur");
-MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ub");
-MODULE_FIRMWARE(FW_ZD1211_PREFIX "ub");
-MODULE_FIRMWARE(FW_ZD1211B_PREFIX "uphr");
-MODULE_FIRMWARE(FW_ZD1211_PREFIX "uphr");
-
-/* Read data from device address space using "firmware interface" which does
- * not require firmware to be loaded. */
-int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len)
-{
- int r;
- struct usb_device *udev = zd_usb_to_usbdev(usb);
- u8 *buf;
-
- /* Use "DMA-aware" buffer. */
- buf = kmalloc(len, GFP_KERNEL);
- if (!buf)
- return -ENOMEM;
- r = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
- USB_REQ_FIRMWARE_READ_DATA, USB_DIR_IN | 0x40, addr, 0,
- buf, len, 5000);
- if (r < 0) {
- dev_err(&udev->dev,
- "read over firmware interface failed: %d\n", r);
- goto exit;
- } else if (r != len) {
- dev_err(&udev->dev,
- "incomplete read over firmware interface: %d/%d\n",
- r, len);
- r = -EIO;
- goto exit;
- }
- r = 0;
- memcpy(data, buf, len);
-exit:
- kfree(buf);
- return r;
-}
-
-#define urb_dev(urb) (&(urb)->dev->dev)
-
-static inline void handle_regs_int_override(struct urb *urb)
-{
- struct zd_usb *usb = urb->context;
- struct zd_usb_interrupt *intr = &usb->intr;
-
- spin_lock(&intr->lock);
- if (atomic_read(&intr->read_regs_enabled)) {
- atomic_set(&intr->read_regs_enabled, 0);
- intr->read_regs_int_overridden = 1;
- complete(&intr->read_regs.completion);
- }
- spin_unlock(&intr->lock);
-}
-
-static inline void handle_regs_int(struct urb *urb)
-{
- struct zd_usb *usb = urb->context;
- struct zd_usb_interrupt *intr = &usb->intr;
- int len;
- u16 int_num;
-
- ZD_ASSERT(in_interrupt());
- spin_lock(&intr->lock);
-
- int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2));
- if (int_num == CR_INTERRUPT) {
- struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context));
- spin_lock(&mac->lock);
- memcpy(&mac->intr_buffer, urb->transfer_buffer,
- USB_MAX_EP_INT_BUFFER);
- spin_unlock(&mac->lock);
- schedule_work(&mac->process_intr);
- } else if (atomic_read(&intr->read_regs_enabled)) {
- len = urb->actual_length;
- intr->read_regs.length = urb->actual_length;
- if (len > sizeof(intr->read_regs.buffer))
- len = sizeof(intr->read_regs.buffer);
-
- memcpy(intr->read_regs.buffer, urb->transfer_buffer, len);
-
- /* Sometimes USB_INT_ID_REGS is not overridden, but comes after
- * USB_INT_ID_RETRY_FAILED. Read-reg retry then gets this
- * delayed USB_INT_ID_REGS, but leaves USB_INT_ID_REGS of
- * retry unhandled. Next read-reg command then might catch
- * this wrong USB_INT_ID_REGS. Fix by ignoring wrong reads.
- */
- if (!check_read_regs(usb, intr->read_regs.req,
- intr->read_regs.req_count))
- goto out;
-
- atomic_set(&intr->read_regs_enabled, 0);
- intr->read_regs_int_overridden = 0;
- complete(&intr->read_regs.completion);
-
- goto out;
- }
-
-out:
- spin_unlock(&intr->lock);
-
- /* CR_INTERRUPT might override read_reg too. */
- if (int_num == CR_INTERRUPT && atomic_read(&intr->read_regs_enabled))
- handle_regs_int_override(urb);
-}
-
-static void int_urb_complete(struct urb *urb)
-{
- int r;
- struct usb_int_header *hdr;
- struct zd_usb *usb;
- struct zd_usb_interrupt *intr;
-
- 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;
- }
-
- 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);
-
- if (buffer)
- 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;
-
- 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(&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:
- 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(unsigned long param)
-{
- struct zd_usb *usb = (struct zd_usb *)param;
-
- 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 = zd_usb_reset_rx_idle_timer_tasklet;
- rx->reset_timer_tasklet.data = (unsigned long)usb;
-}
-
-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->altsetting[0];
- struct usb_endpoint_descriptor *endpoint;
- unsigned char *cmd;
- u8 bulk_out_ep;
- int r;
-
- /* 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) {
- 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 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 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 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 < 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));
- 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 (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;
- }
-
- 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;
- }
- if (in_atomic()) {
- dev_dbg_f(zd_usb_dev(usb),
- "error: io in atomic context not supported\n");
- return -EWOULDBLOCK;
- }
-
- 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 = sizeof(struct usb_req_write_regs) +
- count * sizeof(struct reg_data);
- 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 (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, 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;
-}
projects / cascardo / linux.git / commitdiff