| /* |
| * Marvell Wireless LAN device driver: USB specific handling |
| * |
| * Copyright (C) 2012, Marvell International Ltd. |
| * |
| * This software file (the "File") is distributed by Marvell International |
| * Ltd. under the terms of the GNU General Public License Version 2, June 1991 |
| * (the "License"). You may use, redistribute and/or modify this File in |
| * accordance with the terms and conditions of the License, a copy of which |
| * is available by writing to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the |
| * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. |
| * |
| * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE |
| * ARE EXPRESSLY DISCLAIMED. The License provides additional details about |
| * this warranty disclaimer. |
| */ |
| |
| #include "main.h" |
| #include "usb.h" |
| |
| #define USB_VERSION "1.0" |
| |
| static const char usbdriver_name[] = "usb8797"; |
| |
| static u8 user_rmmod; |
| static struct mwifiex_if_ops usb_ops; |
| static struct semaphore add_remove_card_sem; |
| |
| static struct usb_device_id mwifiex_usb_table[] = { |
| {USB_DEVICE(USB8797_VID, USB8797_PID_1)}, |
| {USB_DEVICE_AND_INTERFACE_INFO(USB8797_VID, USB8797_PID_2, |
| USB_CLASS_VENDOR_SPEC, |
| USB_SUBCLASS_VENDOR_SPEC, 0xff)}, |
| { } /* Terminating entry */ |
| }; |
| |
| MODULE_DEVICE_TABLE(usb, mwifiex_usb_table); |
| |
| static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size); |
| |
| /* This function handles received packet. Necessary action is taken based on |
| * cmd/event/data. |
| */ |
| static int mwifiex_usb_recv(struct mwifiex_adapter *adapter, |
| struct sk_buff *skb, u8 ep) |
| { |
| struct device *dev = adapter->dev; |
| u32 recv_type; |
| __le32 tmp; |
| int ret; |
| |
| if (adapter->hs_activated) |
| mwifiex_process_hs_config(adapter); |
| |
| if (skb->len < INTF_HEADER_LEN) { |
| dev_err(dev, "%s: invalid skb->len\n", __func__); |
| return -1; |
| } |
| |
| switch (ep) { |
| case MWIFIEX_USB_EP_CMD_EVENT: |
| dev_dbg(dev, "%s: EP_CMD_EVENT\n", __func__); |
| skb_copy_from_linear_data(skb, &tmp, INTF_HEADER_LEN); |
| recv_type = le32_to_cpu(tmp); |
| skb_pull(skb, INTF_HEADER_LEN); |
| |
| switch (recv_type) { |
| case MWIFIEX_USB_TYPE_CMD: |
| if (skb->len > MWIFIEX_SIZE_OF_CMD_BUFFER) { |
| dev_err(dev, "CMD: skb->len too large\n"); |
| ret = -1; |
| goto exit_restore_skb; |
| } else if (!adapter->curr_cmd) { |
| dev_dbg(dev, "CMD: no curr_cmd\n"); |
| if (adapter->ps_state == PS_STATE_SLEEP_CFM) { |
| mwifiex_process_sleep_confirm_resp( |
| adapter, skb->data, |
| skb->len); |
| ret = 0; |
| goto exit_restore_skb; |
| } |
| ret = -1; |
| goto exit_restore_skb; |
| } |
| |
| adapter->curr_cmd->resp_skb = skb; |
| adapter->cmd_resp_received = true; |
| break; |
| case MWIFIEX_USB_TYPE_EVENT: |
| if (skb->len < sizeof(u32)) { |
| dev_err(dev, "EVENT: skb->len too small\n"); |
| ret = -1; |
| goto exit_restore_skb; |
| } |
| skb_copy_from_linear_data(skb, &tmp, sizeof(u32)); |
| adapter->event_cause = le32_to_cpu(tmp); |
| dev_dbg(dev, "event_cause %#x\n", adapter->event_cause); |
| |
| if (skb->len > MAX_EVENT_SIZE) { |
| dev_err(dev, "EVENT: event body too large\n"); |
| ret = -1; |
| goto exit_restore_skb; |
| } |
| |
| memcpy(adapter->event_body, skb->data + |
| MWIFIEX_EVENT_HEADER_LEN, skb->len); |
| |
| adapter->event_received = true; |
| adapter->event_skb = skb; |
| break; |
| default: |
| dev_err(dev, "unknown recv_type %#x\n", recv_type); |
| return -1; |
| } |
| break; |
| case MWIFIEX_USB_EP_DATA: |
| dev_dbg(dev, "%s: EP_DATA\n", __func__); |
| if (skb->len > MWIFIEX_RX_DATA_BUF_SIZE) { |
| dev_err(dev, "DATA: skb->len too large\n"); |
| return -1; |
| } |
| skb_queue_tail(&adapter->usb_rx_data_q, skb); |
| adapter->data_received = true; |
| break; |
| default: |
| dev_err(dev, "%s: unknown endport %#x\n", __func__, ep); |
| return -1; |
| } |
| |
| return -EINPROGRESS; |
| |
| exit_restore_skb: |
| /* The buffer will be reused for further cmds/events */ |
| skb_push(skb, INTF_HEADER_LEN); |
| |
| return ret; |
| } |
| |
| static void mwifiex_usb_rx_complete(struct urb *urb) |
| { |
| struct urb_context *context = (struct urb_context *)urb->context; |
| struct mwifiex_adapter *adapter = context->adapter; |
| struct sk_buff *skb = context->skb; |
| struct usb_card_rec *card; |
| int recv_length = urb->actual_length; |
| int size, status; |
| |
| if (!adapter || !adapter->card) { |
| pr_err("mwifiex adapter or card structure is not valid\n"); |
| return; |
| } |
| |
| card = (struct usb_card_rec *)adapter->card; |
| if (card->rx_cmd_ep == context->ep) |
| atomic_dec(&card->rx_cmd_urb_pending); |
| else |
| atomic_dec(&card->rx_data_urb_pending); |
| |
| if (recv_length) { |
| if (urb->status || (adapter->surprise_removed)) { |
| dev_err(adapter->dev, |
| "URB status is failed: %d\n", urb->status); |
| /* Do not free skb in case of command ep */ |
| if (card->rx_cmd_ep != context->ep) |
| dev_kfree_skb_any(skb); |
| goto setup_for_next; |
| } |
| if (skb->len > recv_length) |
| skb_trim(skb, recv_length); |
| else |
| skb_put(skb, recv_length - skb->len); |
| |
| atomic_inc(&adapter->rx_pending); |
| status = mwifiex_usb_recv(adapter, skb, context->ep); |
| |
| dev_dbg(adapter->dev, "info: recv_length=%d, status=%d\n", |
| recv_length, status); |
| if (status == -EINPROGRESS) { |
| queue_work(adapter->workqueue, &adapter->main_work); |
| |
| /* urb for data_ep is re-submitted now; |
| * urb for cmd_ep will be re-submitted in callback |
| * mwifiex_usb_recv_complete |
| */ |
| if (card->rx_cmd_ep == context->ep) |
| return; |
| } else { |
| atomic_dec(&adapter->rx_pending); |
| if (status == -1) |
| dev_err(adapter->dev, |
| "received data processing failed!\n"); |
| |
| /* Do not free skb in case of command ep */ |
| if (card->rx_cmd_ep != context->ep) |
| dev_kfree_skb_any(skb); |
| } |
| } else if (urb->status) { |
| if (!adapter->is_suspended) { |
| dev_warn(adapter->dev, |
| "Card is removed: %d\n", urb->status); |
| adapter->surprise_removed = true; |
| } |
| dev_kfree_skb_any(skb); |
| return; |
| } else { |
| /* Do not free skb in case of command ep */ |
| if (card->rx_cmd_ep != context->ep) |
| dev_kfree_skb_any(skb); |
| |
| /* fall through setup_for_next */ |
| } |
| |
| setup_for_next: |
| if (card->rx_cmd_ep == context->ep) |
| size = MWIFIEX_RX_CMD_BUF_SIZE; |
| else |
| size = MWIFIEX_RX_DATA_BUF_SIZE; |
| |
| mwifiex_usb_submit_rx_urb(context, size); |
| |
| return; |
| } |
| |
| static void mwifiex_usb_tx_complete(struct urb *urb) |
| { |
| struct urb_context *context = (struct urb_context *)(urb->context); |
| struct mwifiex_adapter *adapter = context->adapter; |
| struct usb_card_rec *card = adapter->card; |
| |
| dev_dbg(adapter->dev, "%s: status: %d\n", __func__, urb->status); |
| |
| if (context->ep == card->tx_cmd_ep) { |
| dev_dbg(adapter->dev, "%s: CMD\n", __func__); |
| atomic_dec(&card->tx_cmd_urb_pending); |
| adapter->cmd_sent = false; |
| } else { |
| dev_dbg(adapter->dev, "%s: DATA\n", __func__); |
| atomic_dec(&card->tx_data_urb_pending); |
| mwifiex_write_data_complete(adapter, context->skb, 0, |
| urb->status ? -1 : 0); |
| } |
| |
| queue_work(adapter->workqueue, &adapter->main_work); |
| |
| return; |
| } |
| |
| static int mwifiex_usb_submit_rx_urb(struct urb_context *ctx, int size) |
| { |
| struct mwifiex_adapter *adapter = ctx->adapter; |
| struct usb_card_rec *card = (struct usb_card_rec *)adapter->card; |
| |
| if (card->rx_cmd_ep != ctx->ep) { |
| ctx->skb = dev_alloc_skb(size); |
| if (!ctx->skb) { |
| dev_err(adapter->dev, |
| "%s: dev_alloc_skb failed\n", __func__); |
| return -ENOMEM; |
| } |
| } |
| |
| usb_fill_bulk_urb(ctx->urb, card->udev, |
| usb_rcvbulkpipe(card->udev, ctx->ep), ctx->skb->data, |
| size, mwifiex_usb_rx_complete, (void *)ctx); |
| |
| if (card->rx_cmd_ep == ctx->ep) |
| atomic_inc(&card->rx_cmd_urb_pending); |
| else |
| atomic_inc(&card->rx_data_urb_pending); |
| |
| if (usb_submit_urb(ctx->urb, GFP_ATOMIC)) { |
| dev_err(adapter->dev, "usb_submit_urb failed\n"); |
| dev_kfree_skb_any(ctx->skb); |
| ctx->skb = NULL; |
| |
| if (card->rx_cmd_ep == ctx->ep) |
| atomic_dec(&card->rx_cmd_urb_pending); |
| else |
| atomic_dec(&card->rx_data_urb_pending); |
| |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static void mwifiex_usb_free(struct usb_card_rec *card) |
| { |
| int i; |
| |
| if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb) |
| usb_kill_urb(card->rx_cmd.urb); |
| |
| usb_free_urb(card->rx_cmd.urb); |
| card->rx_cmd.urb = NULL; |
| |
| if (atomic_read(&card->rx_data_urb_pending)) |
| for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) |
| if (card->rx_data_list[i].urb) |
| usb_kill_urb(card->rx_data_list[i].urb); |
| |
| for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) { |
| usb_free_urb(card->rx_data_list[i].urb); |
| card->rx_data_list[i].urb = NULL; |
| } |
| |
| for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) { |
| usb_free_urb(card->tx_data_list[i].urb); |
| card->tx_data_list[i].urb = NULL; |
| } |
| |
| usb_free_urb(card->tx_cmd.urb); |
| card->tx_cmd.urb = NULL; |
| |
| return; |
| } |
| |
| /* This function probes an mwifiex device and registers it. It allocates |
| * the card structure, initiates the device registration and initialization |
| * procedure by adding a logical interface. |
| */ |
| static int mwifiex_usb_probe(struct usb_interface *intf, |
| const struct usb_device_id *id) |
| { |
| struct usb_device *udev = interface_to_usbdev(intf); |
| struct usb_host_interface *iface_desc = intf->cur_altsetting; |
| struct usb_endpoint_descriptor *epd; |
| int ret, i; |
| struct usb_card_rec *card; |
| u16 id_vendor, id_product, bcd_device, bcd_usb; |
| |
| card = kzalloc(sizeof(struct usb_card_rec), GFP_KERNEL); |
| if (!card) |
| return -ENOMEM; |
| |
| id_vendor = le16_to_cpu(udev->descriptor.idVendor); |
| id_product = le16_to_cpu(udev->descriptor.idProduct); |
| bcd_device = le16_to_cpu(udev->descriptor.bcdDevice); |
| bcd_usb = le16_to_cpu(udev->descriptor.bcdUSB); |
| pr_debug("info: VID/PID = %X/%X, Boot2 version = %X\n", |
| id_vendor, id_product, bcd_device); |
| |
| /* PID_1 is used for firmware downloading only */ |
| if (id_product == USB8797_PID_1) |
| card->usb_boot_state = USB8797_FW_DNLD; |
| else |
| card->usb_boot_state = USB8797_FW_READY; |
| |
| card->udev = udev; |
| card->intf = intf; |
| |
| pr_debug("info: bcdUSB=%#x Device Class=%#x SubClass=%#x Protocol=%#x\n", |
| udev->descriptor.bcdUSB, udev->descriptor.bDeviceClass, |
| udev->descriptor.bDeviceSubClass, |
| udev->descriptor.bDeviceProtocol); |
| |
| for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| epd = &iface_desc->endpoint[i].desc; |
| if (usb_endpoint_dir_in(epd) && |
| usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT && |
| usb_endpoint_xfer_bulk(epd)) { |
| pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n", |
| le16_to_cpu(epd->wMaxPacketSize), |
| epd->bEndpointAddress); |
| card->rx_cmd_ep = usb_endpoint_num(epd); |
| atomic_set(&card->rx_cmd_urb_pending, 0); |
| } |
| if (usb_endpoint_dir_in(epd) && |
| usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA && |
| usb_endpoint_xfer_bulk(epd)) { |
| pr_debug("info: bulk IN: max pkt size: %d, addr: %d\n", |
| le16_to_cpu(epd->wMaxPacketSize), |
| epd->bEndpointAddress); |
| card->rx_data_ep = usb_endpoint_num(epd); |
| atomic_set(&card->rx_data_urb_pending, 0); |
| } |
| if (usb_endpoint_dir_out(epd) && |
| usb_endpoint_num(epd) == MWIFIEX_USB_EP_DATA && |
| usb_endpoint_xfer_bulk(epd)) { |
| pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n", |
| le16_to_cpu(epd->wMaxPacketSize), |
| epd->bEndpointAddress); |
| card->tx_data_ep = usb_endpoint_num(epd); |
| atomic_set(&card->tx_data_urb_pending, 0); |
| } |
| if (usb_endpoint_dir_out(epd) && |
| usb_endpoint_num(epd) == MWIFIEX_USB_EP_CMD_EVENT && |
| usb_endpoint_xfer_bulk(epd)) { |
| pr_debug("info: bulk OUT: max pkt size: %d, addr: %d\n", |
| le16_to_cpu(epd->wMaxPacketSize), |
| epd->bEndpointAddress); |
| card->tx_cmd_ep = usb_endpoint_num(epd); |
| atomic_set(&card->tx_cmd_urb_pending, 0); |
| card->bulk_out_maxpktsize = |
| le16_to_cpu(epd->wMaxPacketSize); |
| } |
| } |
| |
| usb_set_intfdata(intf, card); |
| |
| ret = mwifiex_add_card(card, &add_remove_card_sem, &usb_ops, |
| MWIFIEX_USB); |
| if (ret) { |
| pr_err("%s: mwifiex_add_card failed: %d\n", __func__, ret); |
| usb_reset_device(udev); |
| kfree(card); |
| return ret; |
| } |
| |
| usb_get_dev(udev); |
| |
| return 0; |
| } |
| |
| /* Kernel needs to suspend all functions separately. Therefore all |
| * registered functions must have drivers with suspend and resume |
| * methods. Failing that the kernel simply removes the whole card. |
| * |
| * If already not suspended, this function allocates and sends a |
| * 'host sleep activate' request to the firmware and turns off the traffic. |
| */ |
| static int mwifiex_usb_suspend(struct usb_interface *intf, pm_message_t message) |
| { |
| struct usb_card_rec *card = usb_get_intfdata(intf); |
| struct mwifiex_adapter *adapter; |
| int i; |
| |
| if (!card || !card->adapter) { |
| pr_err("%s: card or card->adapter is NULL\n", __func__); |
| return 0; |
| } |
| adapter = card->adapter; |
| |
| if (unlikely(adapter->is_suspended)) |
| dev_warn(adapter->dev, "Device already suspended\n"); |
| |
| mwifiex_enable_hs(adapter); |
| |
| /* 'is_suspended' flag indicates device is suspended. |
| * It must be set here before the usb_kill_urb() calls. Reason |
| * is in the complete handlers, urb->status(= -ENOENT) and |
| * this flag is used in combination to distinguish between a |
| * 'suspended' state and a 'disconnect' one. |
| */ |
| adapter->is_suspended = true; |
| |
| for (i = 0; i < adapter->priv_num; i++) |
| netif_carrier_off(adapter->priv[i]->netdev); |
| |
| if (atomic_read(&card->rx_cmd_urb_pending) && card->rx_cmd.urb) |
| usb_kill_urb(card->rx_cmd.urb); |
| |
| if (atomic_read(&card->rx_data_urb_pending)) |
| for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) |
| if (card->rx_data_list[i].urb) |
| usb_kill_urb(card->rx_data_list[i].urb); |
| |
| for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) |
| if (card->tx_data_list[i].urb) |
| usb_kill_urb(card->tx_data_list[i].urb); |
| |
| if (card->tx_cmd.urb) |
| usb_kill_urb(card->tx_cmd.urb); |
| |
| return 0; |
| } |
| |
| /* Kernel needs to suspend all functions separately. Therefore all |
| * registered functions must have drivers with suspend and resume |
| * methods. Failing that the kernel simply removes the whole card. |
| * |
| * If already not resumed, this function turns on the traffic and |
| * sends a 'host sleep cancel' request to the firmware. |
| */ |
| static int mwifiex_usb_resume(struct usb_interface *intf) |
| { |
| struct usb_card_rec *card = usb_get_intfdata(intf); |
| struct mwifiex_adapter *adapter; |
| int i; |
| |
| if (!card || !card->adapter) { |
| pr_err("%s: card or card->adapter is NULL\n", __func__); |
| return 0; |
| } |
| adapter = card->adapter; |
| |
| if (unlikely(!adapter->is_suspended)) { |
| dev_warn(adapter->dev, "Device already resumed\n"); |
| return 0; |
| } |
| |
| /* Indicate device resumed. The netdev queue will be resumed only |
| * after the urbs have been re-submitted |
| */ |
| adapter->is_suspended = false; |
| |
| if (!atomic_read(&card->rx_data_urb_pending)) |
| for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) |
| mwifiex_usb_submit_rx_urb(&card->rx_data_list[i], |
| MWIFIEX_RX_DATA_BUF_SIZE); |
| |
| if (!atomic_read(&card->rx_cmd_urb_pending)) { |
| card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE); |
| if (card->rx_cmd.skb) |
| mwifiex_usb_submit_rx_urb(&card->rx_cmd, |
| MWIFIEX_RX_CMD_BUF_SIZE); |
| } |
| |
| for (i = 0; i < adapter->priv_num; i++) |
| if (adapter->priv[i]->media_connected) |
| netif_carrier_on(adapter->priv[i]->netdev); |
| |
| /* Disable Host Sleep */ |
| if (adapter->hs_activated) |
| mwifiex_cancel_hs(mwifiex_get_priv(adapter, |
| MWIFIEX_BSS_ROLE_ANY), |
| MWIFIEX_ASYNC_CMD); |
| |
| #ifdef CONFIG_PM |
| /* Resume handler may be called due to remote wakeup, |
| * force to exit suspend anyway |
| */ |
| usb_disable_autosuspend(card->udev); |
| #endif /* CONFIG_PM */ |
| |
| return 0; |
| } |
| |
| static void mwifiex_usb_disconnect(struct usb_interface *intf) |
| { |
| struct usb_card_rec *card = usb_get_intfdata(intf); |
| struct mwifiex_adapter *adapter; |
| int i; |
| |
| if (!card || !card->adapter) { |
| pr_err("%s: card or card->adapter is NULL\n", __func__); |
| return; |
| } |
| |
| adapter = card->adapter; |
| if (!adapter->priv_num) |
| return; |
| |
| /* In case driver is removed when asynchronous FW downloading is |
| * in progress |
| */ |
| wait_for_completion(&adapter->fw_load); |
| |
| if (user_rmmod) { |
| #ifdef CONFIG_PM |
| if (adapter->is_suspended) |
| mwifiex_usb_resume(intf); |
| #endif |
| for (i = 0; i < adapter->priv_num; i++) |
| if ((GET_BSS_ROLE(adapter->priv[i]) == |
| MWIFIEX_BSS_ROLE_STA) && |
| adapter->priv[i]->media_connected) |
| mwifiex_deauthenticate(adapter->priv[i], NULL); |
| |
| mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter, |
| MWIFIEX_BSS_ROLE_ANY), |
| MWIFIEX_FUNC_SHUTDOWN); |
| } |
| |
| mwifiex_usb_free(card); |
| |
| dev_dbg(adapter->dev, "%s: removing card\n", __func__); |
| mwifiex_remove_card(adapter, &add_remove_card_sem); |
| |
| usb_set_intfdata(intf, NULL); |
| usb_put_dev(interface_to_usbdev(intf)); |
| kfree(card); |
| |
| return; |
| } |
| |
| static struct usb_driver mwifiex_usb_driver = { |
| .name = usbdriver_name, |
| .probe = mwifiex_usb_probe, |
| .disconnect = mwifiex_usb_disconnect, |
| .id_table = mwifiex_usb_table, |
| .suspend = mwifiex_usb_suspend, |
| .resume = mwifiex_usb_resume, |
| .supports_autosuspend = 1, |
| }; |
| |
| static int mwifiex_usb_tx_init(struct mwifiex_adapter *adapter) |
| { |
| struct usb_card_rec *card = (struct usb_card_rec *)adapter->card; |
| int i; |
| |
| card->tx_cmd.adapter = adapter; |
| card->tx_cmd.ep = card->tx_cmd_ep; |
| |
| card->tx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!card->tx_cmd.urb) { |
| dev_err(adapter->dev, "tx_cmd.urb allocation failed\n"); |
| return -ENOMEM; |
| } |
| |
| card->tx_data_ix = 0; |
| |
| for (i = 0; i < MWIFIEX_TX_DATA_URB; i++) { |
| card->tx_data_list[i].adapter = adapter; |
| card->tx_data_list[i].ep = card->tx_data_ep; |
| |
| card->tx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!card->tx_data_list[i].urb) { |
| dev_err(adapter->dev, |
| "tx_data_list[] urb allocation failed\n"); |
| return -ENOMEM; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int mwifiex_usb_rx_init(struct mwifiex_adapter *adapter) |
| { |
| struct usb_card_rec *card = (struct usb_card_rec *)adapter->card; |
| int i; |
| |
| card->rx_cmd.adapter = adapter; |
| card->rx_cmd.ep = card->rx_cmd_ep; |
| |
| card->rx_cmd.urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!card->rx_cmd.urb) { |
| dev_err(adapter->dev, "rx_cmd.urb allocation failed\n"); |
| return -ENOMEM; |
| } |
| |
| card->rx_cmd.skb = dev_alloc_skb(MWIFIEX_RX_CMD_BUF_SIZE); |
| if (!card->rx_cmd.skb) { |
| dev_err(adapter->dev, "rx_cmd.skb allocation failed\n"); |
| return -ENOMEM; |
| } |
| |
| if (mwifiex_usb_submit_rx_urb(&card->rx_cmd, MWIFIEX_RX_CMD_BUF_SIZE)) |
| return -1; |
| |
| for (i = 0; i < MWIFIEX_RX_DATA_URB; i++) { |
| card->rx_data_list[i].adapter = adapter; |
| card->rx_data_list[i].ep = card->rx_data_ep; |
| |
| card->rx_data_list[i].urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!card->rx_data_list[i].urb) { |
| dev_err(adapter->dev, |
| "rx_data_list[] urb allocation failed\n"); |
| return -1; |
| } |
| if (mwifiex_usb_submit_rx_urb(&card->rx_data_list[i], |
| MWIFIEX_RX_DATA_BUF_SIZE)) |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static int mwifiex_write_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf, |
| u32 *len, u8 ep, u32 timeout) |
| { |
| struct usb_card_rec *card = adapter->card; |
| int actual_length, ret; |
| |
| if (!(*len % card->bulk_out_maxpktsize)) |
| (*len)++; |
| |
| /* Send the data block */ |
| ret = usb_bulk_msg(card->udev, usb_sndbulkpipe(card->udev, ep), pbuf, |
| *len, &actual_length, timeout); |
| if (ret) { |
| dev_err(adapter->dev, "usb_bulk_msg for tx failed: %d\n", ret); |
| ret = -1; |
| } |
| |
| *len = actual_length; |
| |
| return ret; |
| } |
| |
| static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *pbuf, |
| u32 *len, u8 ep, u32 timeout) |
| { |
| struct usb_card_rec *card = adapter->card; |
| int actual_length, ret; |
| |
| /* Receive the data response */ |
| ret = usb_bulk_msg(card->udev, usb_rcvbulkpipe(card->udev, ep), pbuf, |
| *len, &actual_length, timeout); |
| if (ret) { |
| dev_err(adapter->dev, "usb_bulk_msg for rx failed: %d\n", ret); |
| ret = -1; |
| } |
| |
| *len = actual_length; |
| |
| return ret; |
| } |
| |
| /* This function write a command/data packet to card. */ |
| static int mwifiex_usb_host_to_card(struct mwifiex_adapter *adapter, u8 ep, |
| struct sk_buff *skb, |
| struct mwifiex_tx_param *tx_param) |
| { |
| struct usb_card_rec *card = adapter->card; |
| struct urb_context *context; |
| u8 *data = (u8 *)skb->data; |
| struct urb *tx_urb; |
| |
| if (adapter->is_suspended) { |
| dev_err(adapter->dev, |
| "%s: not allowed while suspended\n", __func__); |
| return -1; |
| } |
| |
| if (adapter->surprise_removed) { |
| dev_err(adapter->dev, "%s: device removed\n", __func__); |
| return -1; |
| } |
| |
| if (ep == card->tx_data_ep && |
| atomic_read(&card->tx_data_urb_pending) >= MWIFIEX_TX_DATA_URB) { |
| return -EBUSY; |
| } |
| |
| dev_dbg(adapter->dev, "%s: ep=%d\n", __func__, ep); |
| |
| if (ep == card->tx_cmd_ep) { |
| context = &card->tx_cmd; |
| } else { |
| if (card->tx_data_ix >= MWIFIEX_TX_DATA_URB) |
| card->tx_data_ix = 0; |
| context = &card->tx_data_list[card->tx_data_ix++]; |
| } |
| |
| context->adapter = adapter; |
| context->ep = ep; |
| context->skb = skb; |
| tx_urb = context->urb; |
| |
| usb_fill_bulk_urb(tx_urb, card->udev, usb_sndbulkpipe(card->udev, ep), |
| data, skb->len, mwifiex_usb_tx_complete, |
| (void *)context); |
| |
| tx_urb->transfer_flags |= URB_ZERO_PACKET; |
| |
| if (ep == card->tx_cmd_ep) |
| atomic_inc(&card->tx_cmd_urb_pending); |
| else |
| atomic_inc(&card->tx_data_urb_pending); |
| |
| if (usb_submit_urb(tx_urb, GFP_ATOMIC)) { |
| dev_err(adapter->dev, "%s: usb_submit_urb failed\n", __func__); |
| if (ep == card->tx_cmd_ep) { |
| atomic_dec(&card->tx_cmd_urb_pending); |
| } else { |
| atomic_dec(&card->tx_data_urb_pending); |
| if (card->tx_data_ix) |
| card->tx_data_ix--; |
| else |
| card->tx_data_ix = MWIFIEX_TX_DATA_URB; |
| } |
| |
| return -1; |
| } else { |
| if (ep == card->tx_data_ep && |
| atomic_read(&card->tx_data_urb_pending) == |
| MWIFIEX_TX_DATA_URB) |
| return -ENOSR; |
| } |
| |
| return -EINPROGRESS; |
| } |
| |
| /* This function register usb device and initialize parameter. */ |
| static int mwifiex_register_dev(struct mwifiex_adapter *adapter) |
| { |
| struct usb_card_rec *card = (struct usb_card_rec *)adapter->card; |
| |
| card->adapter = adapter; |
| adapter->dev = &card->udev->dev; |
| strcpy(adapter->fw_name, USB8797_DEFAULT_FW_NAME); |
| |
| return 0; |
| } |
| |
| static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter, |
| struct mwifiex_fw_image *fw) |
| { |
| int ret = 0; |
| u8 *firmware = fw->fw_buf, *recv_buff; |
| u32 retries = USB8797_FW_MAX_RETRY, dlen; |
| u32 fw_seqnum = 0, tlen = 0, dnld_cmd = 0; |
| struct fw_data *fwdata; |
| struct fw_sync_header sync_fw; |
| u8 check_winner = 1; |
| |
| if (!firmware) { |
| dev_err(adapter->dev, |
| "No firmware image found! Terminating download\n"); |
| ret = -1; |
| goto fw_exit; |
| } |
| |
| /* Allocate memory for transmit */ |
| fwdata = kzalloc(FW_DNLD_TX_BUF_SIZE, GFP_KERNEL); |
| if (!fwdata) |
| goto fw_exit; |
| |
| /* Allocate memory for receive */ |
| recv_buff = kzalloc(FW_DNLD_RX_BUF_SIZE, GFP_KERNEL); |
| if (!recv_buff) |
| goto cleanup; |
| |
| do { |
| /* Send pseudo data to check winner status first */ |
| if (check_winner) { |
| memset(&fwdata->fw_hdr, 0, sizeof(struct fw_header)); |
| dlen = 0; |
| } else { |
| /* copy the header of the fw_data to get the length */ |
| memcpy(&fwdata->fw_hdr, &firmware[tlen], |
| sizeof(struct fw_header)); |
| |
| dlen = le32_to_cpu(fwdata->fw_hdr.data_len); |
| dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd); |
| tlen += sizeof(struct fw_header); |
| |
| memcpy(fwdata->data, &firmware[tlen], dlen); |
| |
| fwdata->seq_num = cpu_to_le32(fw_seqnum); |
| tlen += dlen; |
| } |
| |
| /* If the send/receive fails or CRC occurs then retry */ |
| while (retries--) { |
| u8 *buf = (u8 *)fwdata; |
| u32 len = FW_DATA_XMIT_SIZE; |
| |
| /* send the firmware block */ |
| ret = mwifiex_write_data_sync(adapter, buf, &len, |
| MWIFIEX_USB_EP_CMD_EVENT, |
| MWIFIEX_USB_TIMEOUT); |
| if (ret) { |
| dev_err(adapter->dev, |
| "write_data_sync: failed: %d\n", ret); |
| continue; |
| } |
| |
| buf = recv_buff; |
| len = FW_DNLD_RX_BUF_SIZE; |
| |
| /* Receive the firmware block response */ |
| ret = mwifiex_read_data_sync(adapter, buf, &len, |
| MWIFIEX_USB_EP_CMD_EVENT, |
| MWIFIEX_USB_TIMEOUT); |
| if (ret) { |
| dev_err(adapter->dev, |
| "read_data_sync: failed: %d\n", ret); |
| continue; |
| } |
| |
| memcpy(&sync_fw, recv_buff, |
| sizeof(struct fw_sync_header)); |
| |
| /* check 1st firmware block resp for highest bit set */ |
| if (check_winner) { |
| if (le32_to_cpu(sync_fw.cmd) & 0x80000000) { |
| dev_warn(adapter->dev, |
| "USB is not the winner %#x\n", |
| sync_fw.cmd); |
| |
| /* returning success */ |
| ret = 0; |
| goto cleanup; |
| } |
| |
| dev_dbg(adapter->dev, |
| "USB is the winner, start to download FW\n"); |
| |
| check_winner = 0; |
| break; |
| } |
| |
| /* check the firmware block response for CRC errors */ |
| if (sync_fw.cmd) { |
| dev_err(adapter->dev, |
| "FW received block with CRC %#x\n", |
| sync_fw.cmd); |
| ret = -1; |
| continue; |
| } |
| |
| retries = USB8797_FW_MAX_RETRY; |
| break; |
| } |
| fw_seqnum++; |
| } while ((dnld_cmd != FW_HAS_LAST_BLOCK) && retries); |
| |
| cleanup: |
| dev_dbg(adapter->dev, "%s: %d bytes downloaded\n", __func__, tlen); |
| |
| kfree(recv_buff); |
| kfree(fwdata); |
| |
| if (retries) |
| ret = 0; |
| fw_exit: |
| return ret; |
| } |
| |
| static int mwifiex_usb_dnld_fw(struct mwifiex_adapter *adapter, |
| struct mwifiex_fw_image *fw) |
| { |
| int ret; |
| struct usb_card_rec *card = (struct usb_card_rec *)adapter->card; |
| |
| if (card->usb_boot_state == USB8797_FW_DNLD) { |
| ret = mwifiex_prog_fw_w_helper(adapter, fw); |
| if (ret) |
| return -1; |
| |
| /* Boot state changes after successful firmware download */ |
| if (card->usb_boot_state == USB8797_FW_DNLD) |
| return -1; |
| } |
| |
| ret = mwifiex_usb_rx_init(adapter); |
| if (!ret) |
| ret = mwifiex_usb_tx_init(adapter); |
| |
| return ret; |
| } |
| |
| static void mwifiex_submit_rx_urb(struct mwifiex_adapter *adapter, u8 ep) |
| { |
| struct usb_card_rec *card = (struct usb_card_rec *)adapter->card; |
| |
| skb_push(card->rx_cmd.skb, INTF_HEADER_LEN); |
| if ((ep == card->rx_cmd_ep) && |
| (!atomic_read(&card->rx_cmd_urb_pending))) |
| mwifiex_usb_submit_rx_urb(&card->rx_cmd, |
| MWIFIEX_RX_CMD_BUF_SIZE); |
| |
| return; |
| } |
| |
| static int mwifiex_usb_cmd_event_complete(struct mwifiex_adapter *adapter, |
| struct sk_buff *skb) |
| { |
| atomic_dec(&adapter->rx_pending); |
| mwifiex_submit_rx_urb(adapter, MWIFIEX_USB_EP_CMD_EVENT); |
| |
| return 0; |
| } |
| |
| static int mwifiex_usb_data_complete(struct mwifiex_adapter *adapter, |
| struct sk_buff *skb) |
| { |
| atomic_dec(&adapter->rx_pending); |
| dev_kfree_skb_any(skb); |
| |
| return 0; |
| } |
| |
| /* This function wakes up the card. */ |
| static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter) |
| { |
| /* Simulation of HS_AWAKE event */ |
| adapter->pm_wakeup_fw_try = false; |
| adapter->pm_wakeup_card_req = false; |
| adapter->ps_state = PS_STATE_AWAKE; |
| |
| return 0; |
| } |
| |
| static struct mwifiex_if_ops usb_ops = { |
| .register_dev = mwifiex_register_dev, |
| .wakeup = mwifiex_pm_wakeup_card, |
| .wakeup_complete = mwifiex_pm_wakeup_card_complete, |
| |
| /* USB specific */ |
| .dnld_fw = mwifiex_usb_dnld_fw, |
| .cmdrsp_complete = mwifiex_usb_cmd_event_complete, |
| .event_complete = mwifiex_usb_cmd_event_complete, |
| .data_complete = mwifiex_usb_data_complete, |
| .host_to_card = mwifiex_usb_host_to_card, |
| }; |
| |
| /* This function initializes the USB driver module. |
| * |
| * This initiates the semaphore and registers the device with |
| * USB bus. |
| */ |
| static int mwifiex_usb_init_module(void) |
| { |
| int ret; |
| |
| pr_debug("Marvell USB8797 Driver\n"); |
| |
| sema_init(&add_remove_card_sem, 1); |
| |
| ret = usb_register(&mwifiex_usb_driver); |
| if (ret) |
| pr_err("Driver register failed!\n"); |
| else |
| pr_debug("info: Driver registered successfully!\n"); |
| |
| return ret; |
| } |
| |
| /* This function cleans up the USB driver. |
| * |
| * The following major steps are followed in .disconnect for cleanup: |
| * - Resume the device if its suspended |
| * - Disconnect the device if connected |
| * - Shutdown the firmware |
| * - Unregister the device from USB bus. |
| */ |
| static void mwifiex_usb_cleanup_module(void) |
| { |
| if (!down_interruptible(&add_remove_card_sem)) |
| up(&add_remove_card_sem); |
| |
| /* set the flag as user is removing this module */ |
| user_rmmod = 1; |
| |
| usb_deregister(&mwifiex_usb_driver); |
| } |
| |
| module_init(mwifiex_usb_init_module); |
| module_exit(mwifiex_usb_cleanup_module); |
| |
| MODULE_AUTHOR("Marvell International Ltd."); |
| MODULE_DESCRIPTION("Marvell WiFi-Ex USB Driver version" USB_VERSION); |
| MODULE_VERSION(USB_VERSION); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_FIRMWARE("mrvl/usb8797_uapsta.bin"); |