--- /dev/null
+/*
+ * 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;
+
+ 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");
+ return -1;
+ } 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);
+ return 0;
+ }
+ return -1;
+ }
+
+ 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");
+ return -1;
+ }
+ skb_copy_from_linear_data(skb, &tmp, sizeof(u32));
+ adapter->event_cause = le32_to_cpu(tmp);
+ skb_pull(skb, sizeof(u32));
+ 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");
+ return -1;
+ }
+
+ skb_copy_from_linear_data(skb, adapter->event_body,
+ 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;
+}
+
+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,
+ 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 Protocl=%#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;
+}
+
+/* This function reads one block of firmware data. */
+static int mwifiex_get_fw_data(struct mwifiex_adapter *adapter,
+ u32 offset, u32 len, u8 *buf)
+{
+ if (!buf || !len)
+ return -1;
+
+ if (offset + len > adapter->firmware->size)
+ return -1;
+
+ memcpy(buf, adapter->firmware->data + offset, len);
+
+ 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 */
+ if (firmware)
+ memcpy(&fwdata->fw_hdr, &firmware[tlen],
+ sizeof(struct fw_header));
+ else
+ mwifiex_get_fw_data(adapter, tlen,
+ sizeof(struct fw_header),
+ (u8 *)&fwdata->fw_hdr);
+
+ dlen = le32_to_cpu(fwdata->fw_hdr.data_len);
+ dnld_cmd = le32_to_cpu(fwdata->fw_hdr.dnld_cmd);
+ tlen += sizeof(struct fw_header);
+
+ if (firmware)
+ memcpy(fwdata->data, &firmware[tlen], dlen);
+ else
+ mwifiex_get_fw_data(adapter, tlen, dlen,
+ (u8 *)fwdata->data);
+
+ 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");
projects / cascardo / linux.git / commitdiff