1 // SPDX-License-Identifier: GPL-2.0-only
3 * Espressif Systems Wireless LAN device driver
5 * SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
9 #include <linux/init.h>
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/gpio.h>
13 #include <linux/igmp.h>
17 #include "esp_bt_api.h"
20 #include "esp_kernel_port.h"
22 #include "esp_cfg80211.h"
23 #include "esp_stats.h"
25 #define HOST_GPIO_PIN_INVALID -1
26 static int resetpin = HOST_GPIO_PIN_INVALID;
27 static u32 clockspeed = 0;
28 extern u8 ap_bssid[MAC_ADDR_LEN];
29 extern volatile u8 host_sleep;
31 module_param(resetpin, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
32 MODULE_PARM_DESC(resetpin, "Host's GPIO pin number which is connected to ESP32's EN to reset ESP32 device");
34 module_param(clockspeed, uint, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
35 MODULE_PARM_DESC(clockspeed, "Hosts clock speed in MHz");
37 static void deinit_adapter(void);
40 struct multicast_list mcast_list = {0};
41 struct esp_adapter adapter;
42 /*struct esp_device esp_dev;*/
44 struct esp_adapter *esp_get_adapter(void)
49 void esp_process_new_packet_intr(struct esp_adapter *adapter)
52 queue_work(adapter->if_rx_workqueue, &adapter->if_rx_work);
55 static int process_tx_packet(struct sk_buff *skb)
57 struct esp_wifi_device *priv = NULL;
58 struct esp_skb_cb *cb = NULL;
59 struct esp_payload_header *payload_header = NULL;
60 struct sk_buff *new_skb = NULL;
62 u8 pad_len = 0, realloc_skb = 0;
70 cb = (struct esp_skb_cb *) skb->cb;
75 esp_info("No priv\n");
79 if (netif_queue_stopped((const struct net_device *) priv->ndev)) {
80 esp_info("Netif queue stopped\n");
81 return NETDEV_TX_BUSY;
85 return NETDEV_TX_BUSY;
90 /* Create space for payload header */
91 pad_len = sizeof(struct esp_payload_header);
93 total_len = len + pad_len;
95 /* Align buffer length */
96 pad_len += SKB_DATA_ADDR_ALIGNMENT - (total_len % SKB_DATA_ADDR_ALIGNMENT);
98 if (skb_headroom(skb) < pad_len) {
99 /* Headroom is not sufficient */
103 if (realloc_skb || !IS_ALIGNED((unsigned long) skb->data, SKB_DATA_ADDR_ALIGNMENT)) {
105 if (skb_linearize(skb)) {
106 priv->stats.tx_errors++;
108 esp_err("Failed to linearize SKB");
112 new_skb = esp_alloc_skb(skb->len + pad_len);
115 esp_err("Failed to allocate SKB");
116 priv->stats.tx_errors++;
124 /* Populate new SKB */
125 skb_copy_from_linear_data(skb, pos, skb->len);
126 skb_put(new_skb, skb->len + pad_len);
128 /* Replace old SKB */
129 dev_kfree_skb_any(skb);
132 /* Realloc is not needed, Make space for interface header */
133 skb_push(skb, pad_len);
136 /* Set payload header */
137 payload_header = (struct esp_payload_header *) skb->data;
138 memset(payload_header, 0, pad_len);
140 payload_header->if_type = priv->if_type;
141 payload_header->if_num = priv->if_num;
142 payload_header->len = cpu_to_le16(len);
143 payload_header->offset = cpu_to_le16(pad_len);
144 payload_header->packet_type = PACKET_TYPE_DATA;
146 if (adapter.capabilities & ESP_CHECKSUM_ENABLED)
147 payload_header->checksum = cpu_to_le16(compute_checksum(skb->data, (len + pad_len)));
149 if (!priv->stop_data) {
150 ret = esp_send_packet(priv->adapter, skb);
153 /* esp_err("Failed to send SKB");*/
154 priv->stats.tx_errors++;
156 priv->stats.tx_packets++;
157 priv->stats.tx_bytes += skb->len;
160 dev_kfree_skb_any(skb);
161 priv->stats.tx_dropped++;
167 void esp_port_open(struct esp_wifi_device *priv)
173 void esp_port_close(struct esp_wifi_device *priv)
182 void print_capabilities(u32 cap)
184 esp_info("Capabilities: 0x%x. Features supported are:\n", cap);
185 if (cap & ESP_WLAN_SDIO_SUPPORT)
186 esp_info("\t * WLAN on SDIO\n");
187 else if (cap & ESP_WLAN_SPI_SUPPORT)
188 esp_info("\t * WLAN on SPI\n");
190 if ((cap & ESP_BT_UART_SUPPORT) ||
191 (cap & ESP_BT_SDIO_SUPPORT) ||
192 (cap & ESP_BT_SPI_SUPPORT)) {
193 esp_info("\t * BT/BLE\n");
194 if (cap & ESP_BT_UART_SUPPORT)
195 esp_info("\t - HCI over UART\n");
196 if (cap & ESP_BT_SDIO_SUPPORT)
197 esp_info("\t - HCI over SDIO\n");
198 if (cap & ESP_BT_SPI_SUPPORT)
199 esp_info("\t - HCI over SPI\n");
201 if ((cap & ESP_BLE_ONLY_SUPPORT) && (cap & ESP_BR_EDR_ONLY_SUPPORT))
202 esp_info("\t - BT/BLE dual mode\n");
203 else if (cap & ESP_BLE_ONLY_SUPPORT)
204 esp_info("\t - BLE only\n");
205 else if (cap & ESP_BR_EDR_ONLY_SUPPORT)
206 esp_info("\t - BR EDR only\n");
210 void process_capabilities(struct esp_adapter *adapter)
212 esp_info("ESP peripheral capabilities: 0x%x\n", adapter->capabilities);
215 esp_deinit_bt(adapter);
217 if ((adapter->capabilities & ESP_BT_SPI_SUPPORT) ||
218 (adapter->capabilities & ESP_BT_SDIO_SUPPORT)) {
220 esp_info("ESP Bluetooth init\n");
221 esp_init_bt(adapter);
225 static int check_esp_version(struct fw_version *ver)
227 esp_info("esp32: ESP Firmware version: %u.%u.%u\n",
228 ver->major1, ver->major2, ver->minor);
230 esp_err("Incompatible ESP firmware release detected, Please use correct ESP-Hosted branch/compatible release\n");
236 static void print_reset_reason(uint32_t reason)
240 case 1: esp_info("POWERON_RESET\n"); break; /**<1, Vbat power on reset*/
241 case 3: esp_info("SW_RESET\n"); break; /**<3, Software reset digital core*/
242 case 4: esp_info("OWDT_RESET\n"); break; /**<4, Legacy watch dog reset digital core*/
243 case 5: esp_info("DEEPSLEEP_RESET\n"); break; /**<5, Deep Sleep reset digital core*/
244 case 6: esp_info("SDIO_RESET\n"); break; /**<6, Reset by SLC module, reset digital core*/
245 case 7: esp_info("TG0WDT_SYS_RESET\n"); break; /**<7, Timer Group0 Watch dog reset digital core*/
246 case 8: esp_info("TG1WDT_SYS_RESET\n"); break; /**<8, Timer Group1 Watch dog reset digital core*/
247 case 9: esp_info("RTCWDT_SYS_RESET\n"); break; /**<9, RTC Watch dog Reset digital core*/
248 case 10: esp_info("INTRUSION_RESET\n"); break; /**<10, Instrusion tested to reset CPU*/
249 case 11: esp_info("TGWDT_CPU_RESET\n"); break; /**<11, Time Group reset CPU*/
250 case 12: esp_info("SW_CPU_RESET\n"); break; /**<12, Software reset CPU*/
251 case 13: esp_info("RTCWDT_CPU_RESET\n"); break; /**<13, RTC Watch dog Reset CPU*/
252 case 14: esp_info("EXT_CPU_RESET\n"); break; /**<14, for APP CPU, reseted by PRO CPU*/
253 case 15: esp_info("RTCWDT_BROWN_OUT_RESET\n"); break;/**<15, Reset when the vdd voltage is not stable*/
254 case 16: esp_info("RTCWDT_RTC_RESET\n"); break; /**<16, RTC Watch dog reset digital core and rtc module*/
255 default: esp_info("Unknown[%u]\n", reason); break;
259 int process_fw_data(struct fw_data *fw_p)
262 esp_err("Incomplete/incorrect bootup event received\n");
266 esp_info("ESP chipset's last reset cause:\n");
267 print_reset_reason(le32_to_cpu(fw_p->last_reset_reason));
268 return check_esp_version(&fw_p->version);
271 static int esp_open(struct net_device *ndev)
276 static int esp_stop(struct net_device *ndev)
278 struct esp_wifi_device *priv = netdev_priv(ndev);
280 ESP_MARK_SCAN_DONE(priv, true);
284 static struct net_device_stats *esp_get_stats(struct net_device *ndev)
286 struct esp_wifi_device *priv = netdev_priv(ndev);
294 static int esp_set_mac_address(struct net_device *ndev, void *data)
296 struct esp_wifi_device *priv = netdev_priv(ndev);
297 struct sockaddr *sa = (struct sockaddr *)data;
300 if (!priv || !priv->adapter)
303 esp_info("%u "MACSTR"\n", __LINE__, MAC2STR(sa->sa_data));
305 ret = cmd_set_mac(priv, sa->sa_data);
308 eth_hw_addr_set(ndev, priv->mac_address/*mac_addr->sa_data*/);
313 static void esp_set_rx_mode(struct net_device *ndev)
315 struct esp_wifi_device *priv = netdev_priv(ndev);
316 struct netdev_hw_addr *mac_addr;
319 struct in_device *in_dev = in_dev_get(ndev);
320 struct ip_mc_list *ip_list = in_dev->mc_list;
322 netdev_for_each_mc_addr(mac_addr, ndev) {
323 if (count < MAX_MULTICAST_ADDR_COUNT) {
324 /*esp_info("%d: "MACSTR"\n", count+1, MAC2STR(mac_addr->addr));*/
325 memcpy(&mcast_list.mcast_addr[count++], mac_addr->addr, ETH_ALEN);
329 mcast_list.priv = priv;
330 mcast_list.addr_count = count;
332 if (priv->port_open) {
333 /*esp_info("Set Multicast list\n");*/
334 if (adapter.mac_filter_wq)
335 queue_work(adapter.mac_filter_wq, &adapter.mac_flter_work);
338 cmd_set_mcast_mac_list(priv, &mcast_list);
340 esp_dbg(" IP MC Address: 0x%x\n", ip_list->multiaddr);
341 ip_list = ip_list->next;
347 static int esp_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
349 struct esp_wifi_device *priv = NULL;
350 struct esp_skb_cb *cb = NULL;
355 priv = netdev_priv(ndev);
361 if (!priv->port_open) {
362 priv->stats.tx_dropped++;
363 /*esp_err("Port not yet open\n");*/
368 if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
369 esp_err("Bad len %d\n", skb->len);
370 priv->stats.tx_dropped++;
375 cb = (struct esp_skb_cb *) skb->cb;
378 return process_tx_packet(skb);
381 static const struct net_device_ops esp_netdev_ops = {
382 .ndo_open = esp_open,
383 .ndo_stop = esp_stop,
384 .ndo_start_xmit = esp_hard_start_xmit,
385 .ndo_set_mac_address = esp_set_mac_address,
386 .ndo_validate_addr = eth_validate_addr,
387 .ndo_get_stats = esp_get_stats,
388 .ndo_set_rx_mode = esp_set_rx_mode,
392 void esp_init_priv(struct net_device *ndev)
394 ndev->netdev_ops = &esp_netdev_ops;
395 ndev->needed_headroom = roundup(sizeof(struct esp_payload_header) +
396 INTERFACE_HEADER_PADDING, 4);
399 static int add_network_iface(void)
402 struct esp_adapter *adapter = esp_get_adapter();
403 struct wireless_dev *wdev = NULL;
406 esp_info("adapter not yet init\n");
410 ret = esp_cfg80211_register(adapter);
412 esp_err("Failed to register with cfg80211 (err code 0x%x)\n", ret);
417 wdev = esp_cfg80211_add_iface(adapter->wiphy, "espsta%d", 1, NL80211_IFTYPE_STATION, NULL);
420 /* Return success if network added successfully */
427 int esp_add_card(struct esp_adapter *adapter)
429 RET_ON_FAIL(esp_commands_setup(adapter));
431 RET_ON_FAIL(add_network_iface());
436 void esp_remove_network_interfaces(struct esp_adapter *adapter)
438 uint8_t iface_idx = 0;
439 struct net_device *ndev = NULL;
440 struct esp_wifi_device *priv = NULL;
442 for (iface_idx = 0; iface_idx < ESP_MAX_INTERFACE; iface_idx++) {
444 priv = adapter->priv[iface_idx];
449 if (!test_bit(ESP_NETWORK_UP, &priv->priv_flags))
452 /* stop and unregister network */
457 if (netif_carrier_ok(ndev))
458 netif_carrier_off(ndev);
460 netif_device_detach(ndev);
462 if (ndev->reg_state == NETREG_REGISTERED) {
463 unregister_inetaddr_notifier(&(adapter->priv[0]->nb));
464 unregister_netdev(ndev);
469 clear_bit(ESP_NETWORK_UP, &priv->priv_flags);
472 if (adapter->wiphy) {
474 wiphy_unregister(adapter->wiphy);
475 wiphy_free(adapter->wiphy);
476 adapter->wiphy = NULL;
480 int esp_remove_card(struct esp_adapter *adapter)
482 uint8_t iface_idx = 0;
488 esp_deinit_bt(adapter);
490 esp_commands_teardown(adapter);
492 esp_remove_network_interfaces(adapter);
494 for (iface_idx = 0; iface_idx < ESP_MAX_INTERFACE; iface_idx++) {
495 esp_port_close(adapter->priv[iface_idx]);
496 adapter->priv[iface_idx] = NULL;
502 struct esp_wifi_device *get_priv_from_payload_header(
503 struct esp_payload_header *header)
505 struct esp_wifi_device *priv = NULL;
511 for (i = 0; i < ESP_MAX_INTERFACE; i++) {
512 priv = adapter.priv[i];
517 if (priv->if_type == header->if_type &&
518 priv->if_num == header->if_num) {
525 static void process_esp_bootup_event(struct esp_adapter *adapter,
526 struct esp_internal_bootup_event *evt)
528 if (!adapter || !evt) {
529 esp_err("Invalid arguments\n");
533 if (evt->header.status) {
534 esp_err("Incorrect ESP bootup event\n");
538 esp_info("\nReceived ESP bootup event\n");
539 process_event_esp_bootup(adapter, evt->data, evt->len);
542 static int process_internal_event(struct esp_adapter *adapter,
545 struct event_header *header = NULL;
547 if (!skb || !adapter) {
548 esp_err("esp32: Incorrect event data!\n");
552 header = (struct event_header *) (skb->data);
554 switch (header->event_code) {
556 case ESP_INTERNAL_BOOTUP_EVENT:
557 process_esp_bootup_event(adapter,
558 (struct esp_internal_bootup_event *)(skb->data));
562 esp_info("%u unhandled internal event[%u]\n",
563 __LINE__, header->event_code);
570 static void process_rx_packet(struct esp_adapter *adapter, struct sk_buff *skb)
572 struct esp_wifi_device *priv = NULL;
573 struct esp_payload_header *payload_header = NULL;
574 u16 len = 0, offset = 0;
575 u16 rx_checksum = 0, checksum = 0;
576 struct hci_dev *hdev = adapter->hcidev;
578 struct sk_buff *eap_skb = NULL;
579 struct ethhdr *eth = NULL;
584 /* get the paload header */
585 payload_header = (struct esp_payload_header *) skb->data;
587 len = le16_to_cpu(payload_header->len);
588 offset = le16_to_cpu(payload_header->offset);
590 if (payload_header->reserved2 == 0xFF) {
591 print_hex_dump(KERN_INFO, "Wake up packet: ", DUMP_PREFIX_ADDRESS, 16, 1, skb->data, len+offset, 1);
594 if (adapter->capabilities & ESP_CHECKSUM_ENABLED) {
595 rx_checksum = le16_to_cpu(payload_header->checksum);
596 payload_header->checksum = 0;
598 checksum = compute_checksum(skb->data, (len + offset));
600 if (checksum != rx_checksum) {
601 dev_kfree_skb_any(skb);
606 /* chop off the header from skb */
607 skb_pull(skb, offset);
609 if (payload_header->if_type == ESP_STA_IF || payload_header->if_type == ESP_AP_IF) {
611 /* retrieve priv based on payload header contents */
612 priv = get_priv_from_payload_header(payload_header);
615 esp_err("Empty priv\n");
616 dev_kfree_skb_any(skb);
620 if (payload_header->packet_type == PACKET_TYPE_EAPOL) {
621 esp_info("Rx PACKET_TYPE_EAPOL!!!!\n");
624 eap_skb = alloc_skb(skb->len + ETH_HLEN, GFP_KERNEL);
626 esp_info("%u memory alloc failed\n", __LINE__);
629 eap_skb->dev = priv->ndev;
631 if (!IS_ALIGNED((unsigned long) eap_skb->data, SKB_DATA_ADDR_ALIGNMENT)) {
632 esp_info("%u eap skb unaligned\n", __LINE__);
635 eth = (struct ethhdr *) skb_put(eap_skb, ETH_HLEN);
636 ether_addr_copy(eth->h_dest, /*skb->data*/priv->ndev->dev_addr);
637 ether_addr_copy(eth->h_source, /*skb->data+6*/ ap_bssid);
638 eth->h_proto = cpu_to_be16(ETH_P_PAE);
640 skb_put_data(eap_skb, skb->data, skb->len);
641 eap_skb->protocol = eth_type_trans(eap_skb, eap_skb->dev);
645 } else if (payload_header->packet_type == PACKET_TYPE_DATA) {
647 skb->dev = priv->ndev;
648 skb->protocol = eth_type_trans(skb, priv->ndev);
649 skb->ip_summed = CHECKSUM_NONE;
651 priv->stats.rx_bytes += skb->len;
652 /* Forward skb to kernel */
654 priv->stats.rx_packets++;
655 } else if (payload_header->packet_type == PACKET_TYPE_COMMAND_RESPONSE) {
656 process_cmd_resp(priv->adapter, skb);
657 } else if (payload_header->packet_type == PACKET_TYPE_EVENT) {
658 process_cmd_event(priv, skb);
659 dev_kfree_skb_any(skb);
662 } else if (payload_header->if_type == ESP_HCI_IF) {
666 hci_skb_pkt_type(skb) = *type;
669 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0))
670 if (hci_recv_frame(hdev, skb)) {
672 if (hci_recv_frame(skb)) {
676 esp_hci_update_rx_counter(hdev, *type, skb->len);
679 } else if (payload_header->if_type == ESP_INTERNAL_IF) {
681 /* Queue event skb for processing in events workqueue */
682 skb_queue_tail(&adapter->events_skb_q, skb);
684 if (adapter->events_wq)
685 queue_work(adapter->events_wq, &adapter->events_work);
687 dev_kfree_skb_any(skb);
689 } else if (payload_header->if_type == ESP_TEST_IF) {
691 update_test_raw_tp_rx_stats(len);
693 dev_kfree_skb_any(skb);
695 dev_kfree_skb_any(skb);
699 int esp_is_tx_queue_paused(struct esp_wifi_device *priv)
701 if (!priv || !priv->ndev)
705 !netif_queue_stopped((const struct net_device *)priv->ndev)))
710 void esp_tx_pause(struct esp_wifi_device *priv)
712 if (!priv || !priv->ndev)
715 if (!netif_queue_stopped((const struct net_device *)priv->ndev)) {
716 netif_stop_queue(priv->ndev);
720 void esp_tx_resume(struct esp_wifi_device *priv)
722 if (!priv || !priv->ndev)
725 if (netif_queue_stopped((const struct net_device *)priv->ndev)) {
726 netif_wake_queue(priv->ndev);
730 struct sk_buff *esp_alloc_skb(u32 len)
732 struct sk_buff *skb = NULL;
736 skb = netdev_alloc_skb(NULL, len + INTERFACE_HEADER_PADDING);
739 /* Align SKB data pointer */
740 offset = ((unsigned long)skb->data) & (SKB_DATA_ADDR_ALIGNMENT - 1);
743 skb_reserve(skb, INTERFACE_HEADER_PADDING - offset);
750 static int esp_get_packets(struct esp_adapter *adapter)
752 struct sk_buff *skb = NULL;
754 if (!adapter || !adapter->if_ops || !adapter->if_ops->read)
757 skb = adapter->if_ops->read(adapter);
762 process_rx_packet(adapter, skb);
767 int esp_send_packet(struct esp_adapter *adapter, struct sk_buff *skb)
769 if (!adapter || !adapter->if_ops || !adapter->if_ops->write) {
770 esp_err("%u adapter: %p\n", __LINE__, adapter);
774 return adapter->if_ops->write(adapter, skb);
777 static void esp_if_rx_work(struct work_struct *work)
779 /* read inbound packet and forward it to network/serial interface */
780 esp_get_packets(&adapter);
783 static void update_mac_filter(struct work_struct *work)
785 cmd_set_mcast_mac_list(mcast_list.priv, &mcast_list);
788 static void esp_events_work(struct work_struct *work)
790 struct sk_buff *skb = NULL;
792 skb = skb_dequeue(&adapter.events_skb_q);
796 process_internal_event(&adapter, skb);
797 dev_kfree_skb_any(skb);
800 static struct esp_adapter *init_adapter(void)
802 memset(&adapter, 0, sizeof(adapter));
804 /* Prepare interface RX work */
805 adapter.if_rx_workqueue = alloc_workqueue("ESP_IF_RX_WORK_QUEUE", 0, 0);
807 if (!adapter.if_rx_workqueue) {
812 INIT_WORK(&adapter.if_rx_work, esp_if_rx_work);
814 skb_queue_head_init(&adapter.events_skb_q);
816 adapter.events_wq = alloc_workqueue("ESP_EVENTS_WORKQUEUE", WQ_HIGHPRI, 0);
818 if (!adapter.events_wq) {
823 INIT_WORK(&adapter.events_work, esp_events_work);
825 adapter.mac_filter_wq = alloc_workqueue("MAC_FILTER", 0, 0);
826 if (!adapter.mac_filter_wq) {
831 INIT_WORK(&adapter.mac_flter_work, update_mac_filter);
836 static void deinit_adapter(void)
838 skb_queue_purge(&adapter.events_skb_q);
840 if (adapter.events_wq)
841 destroy_workqueue(adapter.events_wq);
843 if (adapter.if_rx_workqueue)
844 destroy_workqueue(adapter.if_rx_workqueue);
846 if (adapter.mac_filter_wq)
847 destroy_workqueue(adapter.mac_filter_wq);
850 static void esp_reset(void)
852 if (resetpin != HOST_GPIO_PIN_INVALID) {
853 /* Check valid GPIO or not */
854 if (!gpio_is_valid(resetpin)) {
855 esp_warn("host resetpin (%d) configured is invalid GPIO\n", resetpin);
856 resetpin = HOST_GPIO_PIN_INVALID;
858 gpio_request(resetpin, "sysfs");
860 /* HOST's resetpin set to OUTPUT, HIGH */
861 gpio_direction_output(resetpin, true);
863 /* HOST's resetpin set to LOW */
864 gpio_set_value(resetpin, 0);
867 /* HOST's resetpin set to INPUT */
868 gpio_direction_input(resetpin);
870 esp_dbg("Triggering ESP reset.\n");
876 static int __init esp_init(void)
879 struct esp_adapter *adapter = NULL;
881 /* Reset ESP, Clean start ESP */
885 adapter = init_adapter();
890 /* Init transport layer */
891 ret = esp_init_interface_layer(adapter, clockspeed);
900 static void __exit esp_exit(void)
902 uint8_t iface_idx = 0;
904 test_raw_tp_cleanup();
906 for (iface_idx = 0; iface_idx < ESP_MAX_INTERFACE; iface_idx++) {
907 cmd_deinit_interface(adapter.priv[iface_idx]);
909 clear_bit(ESP_DRIVER_ACTIVE, &adapter.state_flags);
911 esp_deinit_interface_layer();
914 if (resetpin != HOST_GPIO_PIN_INVALID) {
918 MODULE_LICENSE("GPL");
922 MODULE_DESCRIPTION("Wifi driver for ESP-Hosted solution");
923 MODULE_VERSION("0.1");
924 module_init(esp_init);
925 module_exit(esp_exit);