diff options
Diffstat (limited to 'drivers/net/wireless/zd1211rw/zd_usb.c')
| -rw-r--r-- | drivers/net/wireless/zd1211rw/zd_usb.c | 2060 |
1 files changed, 0 insertions, 2060 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_usb.c b/drivers/net/wireless/zd1211rw/zd_usb.c deleted file mode 100644 index a912dc0..0000000 --- a/drivers/net/wireless/zd1211rw/zd_usb.c +++ /dev/null @@ -1,2060 +0,0 @@ -/* 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; -} |
