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 RELEASE_VERSION "1.0.3"
26 #define HOST_GPIO_PIN_INVALID -1
27 #define CONFIG_ALLOW_MULTICAST_WAKEUP 1
28 static int resetpin = HOST_GPIO_PIN_INVALID;
29 static u32 clockspeed = 0;
30 extern u8 ap_bssid[MAC_ADDR_LEN];
31 extern volatile u8 host_sleep;
34 module_param(resetpin, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
35 MODULE_PARM_DESC(resetpin, "Host's GPIO pin number which is connected to ESP32's EN to reset ESP32 device");
37 module_param(clockspeed, uint, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
38 MODULE_PARM_DESC(clockspeed, "Hosts clock speed in MHz");
40 module_param(raw_tp_mode, uint, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
41 MODULE_PARM_DESC(raw_tp_mode, "Mode choosed to test raw throughput");
43 static void deinit_adapter(void);
46 struct multicast_list mcast_list = {0};
47 struct esp_adapter adapter;
48 /*struct esp_device esp_dev;*/
50 struct esp_adapter *esp_get_adapter(void)
55 void esp_process_new_packet_intr(struct esp_adapter *adapter)
58 queue_work(adapter->if_rx_workqueue, &adapter->if_rx_work);
61 static int process_tx_packet(struct sk_buff *skb)
63 struct esp_wifi_device *priv = NULL;
64 struct esp_skb_cb *cb = NULL;
65 struct esp_payload_header *payload_header = NULL;
66 struct sk_buff *new_skb = NULL;
68 u8 pad_len = 0, realloc_skb = 0;
76 cb = (struct esp_skb_cb *) skb->cb;
81 esp_info("No priv\n");
85 if (netif_queue_stopped((const struct net_device *) priv->ndev)) {
86 esp_info("Netif queue stopped\n");
87 return NETDEV_TX_BUSY;
91 return NETDEV_TX_BUSY;
96 /* Create space for payload header */
97 pad_len = sizeof(struct esp_payload_header);
99 total_len = len + pad_len;
101 /* Align buffer length */
102 pad_len += SKB_DATA_ADDR_ALIGNMENT - (total_len % SKB_DATA_ADDR_ALIGNMENT);
104 if (skb_headroom(skb) < pad_len) {
105 /* Headroom is not sufficient */
109 if (realloc_skb || !IS_ALIGNED((unsigned long) skb->data, SKB_DATA_ADDR_ALIGNMENT)) {
111 if (skb_linearize(skb)) {
112 priv->stats.tx_errors++;
114 esp_err("Failed to linearize SKB");
118 new_skb = esp_alloc_skb(skb->len + pad_len);
121 esp_err("Failed to allocate SKB");
122 priv->stats.tx_errors++;
130 /* Populate new SKB */
131 skb_copy_from_linear_data(skb, pos, skb->len);
132 skb_put(new_skb, skb->len + pad_len);
134 /* Replace old SKB */
135 dev_kfree_skb_any(skb);
138 /* Realloc is not needed, Make space for interface header */
139 skb_push(skb, pad_len);
142 /* Set payload header */
143 payload_header = (struct esp_payload_header *) skb->data;
144 memset(payload_header, 0, pad_len);
146 payload_header->if_type = priv->if_type;
147 payload_header->if_num = priv->if_num;
148 payload_header->len = cpu_to_le16(len);
149 payload_header->offset = cpu_to_le16(pad_len);
150 payload_header->packet_type = PACKET_TYPE_DATA;
152 if (adapter.capabilities & ESP_CHECKSUM_ENABLED)
153 payload_header->checksum = cpu_to_le16(compute_checksum(skb->data, (len + pad_len)));
155 if (!priv->stop_data) {
156 ret = esp_send_packet(priv->adapter, skb);
159 esp_verbose("Failed to send SKB");
160 priv->stats.tx_errors++;
162 priv->stats.tx_packets++;
163 priv->stats.tx_bytes += skb->len;
166 dev_kfree_skb_any(skb);
167 priv->stats.tx_dropped++;
173 void esp_port_open(struct esp_wifi_device *priv)
179 void esp_port_close(struct esp_wifi_device *priv)
188 void print_capabilities(u32 cap)
190 esp_info("Capabilities: 0x%x. Features supported are:\n", cap);
191 if (cap & ESP_WLAN_SDIO_SUPPORT)
192 esp_info("\t * WLAN on SDIO\n");
193 else if (cap & ESP_WLAN_SPI_SUPPORT)
194 esp_info("\t * WLAN on SPI\n");
196 if ((cap & ESP_BT_UART_SUPPORT) ||
197 (cap & ESP_BT_SDIO_SUPPORT) ||
198 (cap & ESP_BT_SPI_SUPPORT)) {
199 esp_info("\t * BT/BLE\n");
200 if (cap & ESP_BT_UART_SUPPORT)
201 esp_info("\t - HCI over UART\n");
202 if (cap & ESP_BT_SDIO_SUPPORT)
203 esp_info("\t - HCI over SDIO\n");
204 if (cap & ESP_BT_SPI_SUPPORT)
205 esp_info("\t - HCI over SPI\n");
207 if ((cap & ESP_BLE_ONLY_SUPPORT) && (cap & ESP_BR_EDR_ONLY_SUPPORT))
208 esp_info("\t - BT/BLE dual mode\n");
209 else if (cap & ESP_BLE_ONLY_SUPPORT)
210 esp_info("\t - BLE only\n");
211 else if (cap & ESP_BR_EDR_ONLY_SUPPORT)
212 esp_info("\t - BR EDR only\n");
216 void init_bt(struct esp_adapter *adapter)
219 if ((adapter->capabilities & ESP_BT_SPI_SUPPORT) ||
220 (adapter->capabilities & ESP_BT_SDIO_SUPPORT)) {
222 esp_info("ESP Bluetooth init\n");
223 esp_init_bt(adapter);
227 static int check_esp_version(struct fw_version *ver)
229 esp_info("ESP Firmware version: %u.%u.%u\n",
230 ver->major1, ver->major2, ver->minor);
232 esp_err("Incompatible ESP firmware release detected, Please use correct ESP-Hosted branch/compatible release\n");
238 static void print_reset_reason(uint32_t reason)
242 case 1: esp_info("POWERON_RESET\n"); break; /**<1, Vbat power on reset*/
243 case 3: esp_info("SW_RESET\n"); break; /**<3, Software reset digital core*/
244 case 4: esp_info("OWDT_RESET\n"); break; /**<4, Legacy watch dog reset digital core*/
245 case 5: esp_info("DEEPSLEEP_RESET\n"); break; /**<5, Deep Sleep reset digital core*/
246 case 6: esp_info("SDIO_RESET\n"); break; /**<6, Reset by SLC module, reset digital core*/
247 case 7: esp_info("TG0WDT_SYS_RESET\n"); break; /**<7, Timer Group0 Watch dog reset digital core*/
248 case 8: esp_info("TG1WDT_SYS_RESET\n"); break; /**<8, Timer Group1 Watch dog reset digital core*/
249 case 9: esp_info("RTCWDT_SYS_RESET\n"); break; /**<9, RTC Watch dog Reset digital core*/
250 case 10: esp_info("INTRUSION_RESET\n"); break; /**<10, Instrusion tested to reset CPU*/
251 case 11: esp_info("TGWDT_CPU_RESET\n"); break; /**<11, Time Group reset CPU*/
252 case 12: esp_info("SW_CPU_RESET\n"); break; /**<12, Software reset CPU*/
253 case 13: esp_info("RTCWDT_CPU_RESET\n"); break; /**<13, RTC Watch dog Reset CPU*/
254 case 14: esp_info("EXT_CPU_RESET\n"); break; /**<14, for APP CPU, reseted by PRO CPU*/
255 case 15: esp_info("RTCWDT_BROWN_OUT_RESET\n"); break;/**<15, Reset when the vdd voltage is not stable*/
256 case 16: esp_info("RTCWDT_RTC_RESET\n"); break; /**<16, RTC Watch dog reset digital core and rtc module*/
257 default: esp_info("Unknown[%u]\n", reason); break;
261 static int process_fw_data(struct fw_data *fw_p, int tag_len)
263 if (tag_len != sizeof(struct fw_data)) {
264 esp_err("Length not matching to firmware data size\n");
268 esp_info("ESP chipset's last reset cause:\n");
269 print_reset_reason(le32_to_cpu(fw_p->last_reset_reason));
271 return check_esp_version(&fw_p->version);
274 int process_event_esp_bootup(struct esp_adapter *adapter, u8 *evt_buf, u8 len)
276 int len_left = len, tag_len, ret = 0;
279 if (!adapter || !evt_buf)
282 if (len_left >= 64) {
283 esp_info("ESP init event len looks unexpected: %u (>=64)\n", len_left);
284 esp_info("You probably facing timing mismatch at transport layer\n");
287 clear_bit(ESP_INIT_DONE, &adapter->state_flags);
288 /* Deinit module if already initialized */
289 esp_deinit_module(adapter);
293 while (len_left > 0) {
294 tag_len = *(pos + 1);
296 esp_info("Bootup Event tag: %d\n", *pos);
299 case ESP_BOOTUP_CAPABILITY:
300 adapter->capabilities = *(pos + 2);
302 case ESP_BOOTUP_FIRMWARE_CHIP_ID:
303 ret = esp_validate_chipset(adapter, *(pos + 2));
305 case ESP_BOOTUP_FW_DATA:
306 ret = process_fw_data((struct fw_data *)(pos + 2), tag_len);
308 case ESP_BOOTUP_SPI_CLK_MHZ:
309 ret = esp_adjust_spi_clock(adapter, *(pos + 2));
312 esp_warn("Unsupported tag=%x in bootup event\n", *pos);
316 esp_err("failed to process tag=%x in bootup event\n", *pos);
319 pos += (tag_len + 2);
320 len_left -= (tag_len + 2);
323 if (esp_add_card(adapter)) {
324 esp_err("network iterface init failed\n");
329 if (raw_tp_mode !=0) {
331 process_test_capabilities(raw_tp_mode);
332 esp_init_raw_tp(adapter);
334 esp_err("RAW TP mode selected but not enabled\n");
338 set_bit(ESP_INIT_DONE, &adapter->state_flags);
339 print_capabilities(adapter->capabilities);
344 static int esp_open(struct net_device *ndev)
349 static int esp_stop(struct net_device *ndev)
354 static struct net_device_stats *esp_get_stats(struct net_device *ndev)
356 struct esp_wifi_device *priv = netdev_priv(ndev);
364 static int esp_set_mac_address(struct net_device *ndev, void *data)
366 struct esp_wifi_device *priv = netdev_priv(ndev);
367 struct sockaddr *sa = (struct sockaddr *)data;
370 if (!priv || !priv->adapter)
373 esp_info("%u "MACSTR"\n", __LINE__, MAC2STR(sa->sa_data));
375 ret = cmd_set_mac(priv, sa->sa_data);
378 eth_hw_addr_set(ndev, priv->mac_address/*mac_addr->sa_data*/);
383 static void esp_set_rx_mode(struct net_device *ndev)
385 struct esp_adapter *adapter = esp_get_adapter();
387 schedule_work(&adapter->mac_flter_work);
390 static int esp_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
392 struct esp_wifi_device *priv = NULL;
393 struct esp_skb_cb *cb = NULL;
398 priv = netdev_priv(ndev);
404 if (!priv->port_open) {
405 priv->stats.tx_dropped++;
406 esp_verbose("Port not yet open\n");
411 if (!skb->len || (skb->len > ETH_FRAME_LEN)) {
412 esp_err("Bad len %d\n", skb->len);
413 priv->stats.tx_dropped++;
418 cb = (struct esp_skb_cb *) skb->cb;
421 return process_tx_packet(skb);
424 static const struct net_device_ops esp_netdev_ops = {
425 .ndo_open = esp_open,
426 .ndo_stop = esp_stop,
427 .ndo_start_xmit = esp_hard_start_xmit,
428 .ndo_set_mac_address = esp_set_mac_address,
429 .ndo_validate_addr = eth_validate_addr,
430 .ndo_get_stats = esp_get_stats,
431 .ndo_set_rx_mode = esp_set_rx_mode,
435 void esp_init_priv(struct net_device *ndev)
437 ndev->netdev_ops = &esp_netdev_ops;
438 ndev->needed_headroom = roundup(sizeof(struct esp_payload_header) +
439 INTERFACE_HEADER_PADDING, 4);
442 static int esp_add_network_ifaces(struct esp_adapter *adapter)
444 struct wireless_dev *wdev = NULL;
447 esp_info("adapter not yet init\n");
452 wdev = esp_cfg80211_add_iface(adapter->wiphy, "espsta%d", 1, NL80211_IFTYPE_STATION, NULL);
455 /* Return success if network added successfully */
462 int esp_init_raw_tp(struct esp_adapter *adapter)
464 RET_ON_FAIL(cmd_init_raw_tp_task_timer(adapter->priv[ESP_STA_NW_IF]));
468 int esp_add_card(struct esp_adapter *adapter)
470 RET_ON_FAIL(esp_commands_setup(adapter));
471 RET_ON_FAIL(esp_add_wiphy(adapter));
472 RET_ON_FAIL(esp_add_network_ifaces(adapter));
477 static int esp_remove_network_ifaces(struct esp_adapter *adapter)
479 uint8_t iface_idx = 0;
480 struct net_device *ndev = NULL;
481 struct esp_wifi_device *priv = NULL;
483 for (iface_idx = 0; iface_idx < ESP_MAX_INTERFACE; iface_idx++) {
485 priv = adapter->priv[iface_idx];
488 if (!test_bit(ESP_NETWORK_UP, &priv->priv_flags))
492 #if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
494 ndev->needs_free_netdev = true;
496 wiphy_lock(adapter->wiphy);
497 cfg80211_unregister_wdev(&priv->wdev);
498 wiphy_unlock(adapter->wiphy);
501 if (ndev && ndev->reg_state == NETREG_REGISTERED) {
502 unregister_netdev(ndev);
507 adapter->priv[iface_idx] = NULL;
513 static int stop_network_iface(struct esp_wifi_device *priv)
515 struct net_device *ndev;
520 if (!test_bit(ESP_NETWORK_UP, &priv->priv_flags))
523 esp_mark_scan_done_and_disconnect(priv, false);
524 esp_port_close(priv);
526 /* stop and unregister network */
530 netif_carrier_off(ndev);
531 netif_device_detach(ndev);
533 unregister_inetaddr_notifier(&(priv->nb));
539 int esp_stop_network_ifaces(struct esp_adapter *adapter)
541 uint8_t iface_idx = 0;
543 for (iface_idx = 0; iface_idx < ESP_MAX_INTERFACE; iface_idx++) {
544 stop_network_iface(adapter->priv[iface_idx]);
549 cfg80211_shutdown_all_interfaces(adapter->wiphy);
556 int esp_remove_card(struct esp_adapter *adapter)
562 esp_stop_network_ifaces(adapter);
563 /* BT may have been initialized after fw bootup event, deinit it */
564 esp_deinit_bt(adapter);
565 esp_commands_teardown(adapter);
566 esp_remove_network_ifaces(adapter);
567 esp_remove_wiphy(adapter);
572 struct esp_wifi_device *get_priv_from_payload_header(
573 struct esp_payload_header *header)
575 struct esp_wifi_device *priv = NULL;
581 for (i = 0; i < ESP_MAX_INTERFACE; i++) {
582 priv = adapter.priv[i];
587 if (priv->if_type == header->if_type &&
588 priv->if_num == header->if_num) {
595 static void process_esp_bootup_event(struct esp_adapter *adapter,
596 struct esp_internal_bootup_event *evt)
598 if (!adapter || !evt) {
599 esp_err("Invalid arguments\n");
603 if (evt->header.status) {
604 esp_err("Incorrect ESP bootup event\n");
608 esp_info("Received ESP bootup event\n");
609 process_event_esp_bootup(adapter, evt->data, evt->len);
612 static int process_internal_event(struct esp_adapter *adapter,
615 struct event_header *header = NULL;
617 if (!skb || !adapter) {
618 esp_err("Incorrect event data!\n");
622 header = (struct event_header *) (skb->data);
624 switch (header->event_code) {
626 case ESP_INTERNAL_BOOTUP_EVENT:
627 process_esp_bootup_event(adapter,
628 (struct esp_internal_bootup_event *)(skb->data));
632 esp_info("%u unhandled internal event[%u]\n",
633 __LINE__, header->event_code);
640 static void process_rx_packet(struct esp_adapter *adapter, struct sk_buff *skb)
642 struct esp_wifi_device *priv = NULL;
643 struct esp_payload_header *payload_header = NULL;
644 u16 len = 0, offset = 0;
645 u16 rx_checksum = 0, checksum = 0;
646 struct hci_dev *hdev = adapter->hcidev;
648 struct sk_buff *eap_skb = NULL;
649 struct ethhdr *eth = NULL;
654 /* get the paload header */
655 payload_header = (struct esp_payload_header *) skb->data;
657 len = le16_to_cpu(payload_header->len);
658 offset = le16_to_cpu(payload_header->offset);
660 if (payload_header->reserved2 == 0xFF) {
661 esp_hex_dump("Wake up packet: ", skb->data, len+offset);
664 if (adapter->capabilities & ESP_CHECKSUM_ENABLED) {
665 rx_checksum = le16_to_cpu(payload_header->checksum);
666 payload_header->checksum = 0;
668 checksum = compute_checksum(skb->data, (len + offset));
670 if (checksum != rx_checksum) {
671 dev_kfree_skb_any(skb);
676 /* chop off the header from skb */
677 skb_pull(skb, offset);
679 if (payload_header->if_type == ESP_STA_IF || payload_header->if_type == ESP_AP_IF) {
681 /* retrieve priv based on payload header contents */
682 priv = get_priv_from_payload_header(payload_header);
685 esp_err("Empty priv\n");
686 dev_kfree_skb_any(skb);
690 if (payload_header->packet_type == PACKET_TYPE_EAPOL) {
691 esp_info("Rx PACKET_TYPE_EAPOL!!!!\n");
694 eap_skb = alloc_skb(skb->len + ETH_HLEN, GFP_KERNEL);
696 esp_info("%u memory alloc failed\n", __LINE__);
697 dev_kfree_skb_any(skb);
700 eap_skb->dev = priv->ndev;
702 if (!IS_ALIGNED((unsigned long) eap_skb->data, SKB_DATA_ADDR_ALIGNMENT)) {
703 esp_info("%u eap skb unaligned\n", __LINE__);
706 eth = (struct ethhdr *) skb_put(eap_skb, ETH_HLEN);
707 ether_addr_copy(eth->h_dest, /*skb->data*/priv->ndev->dev_addr);
708 ether_addr_copy(eth->h_source, /*skb->data+6*/ ap_bssid);
709 eth->h_proto = cpu_to_be16(ETH_P_PAE);
711 skb_put_data(eap_skb, skb->data, skb->len);
712 eap_skb->protocol = eth_type_trans(eap_skb, eap_skb->dev);
713 dev_kfree_skb_any(skb);
717 } else if (payload_header->packet_type == PACKET_TYPE_DATA) {
719 skb->dev = priv->ndev;
720 skb->protocol = eth_type_trans(skb, priv->ndev);
721 skb->ip_summed = CHECKSUM_NONE;
723 priv->stats.rx_bytes += skb->len;
724 /* Forward skb to kernel */
726 priv->stats.rx_packets++;
727 } else if (payload_header->packet_type == PACKET_TYPE_COMMAND_RESPONSE) {
728 process_cmd_resp(priv->adapter, skb);
729 } else if (payload_header->packet_type == PACKET_TYPE_EVENT) {
730 process_cmd_event(priv, skb);
731 dev_kfree_skb_any(skb);
734 } else if (payload_header->if_type == ESP_HCI_IF) {
738 hci_skb_pkt_type(skb) = *type;
741 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0))
742 if (hci_recv_frame(hdev, skb)) {
744 if (hci_recv_frame(skb)) {
748 esp_hci_update_rx_counter(hdev, *type, skb->len);
751 } else if (payload_header->if_type == ESP_INTERNAL_IF) {
753 /* Queue event skb for processing in events workqueue */
754 skb_queue_tail(&adapter->events_skb_q, skb);
756 if (adapter->events_wq)
757 queue_work(adapter->events_wq, &adapter->events_work);
759 dev_kfree_skb_any(skb);
761 } else if (payload_header->if_type == ESP_TEST_IF) {
763 if (raw_tp_mode != 0) {
764 update_test_raw_tp_rx_stats(len);
767 dev_kfree_skb_any(skb);
769 dev_kfree_skb_any(skb);
773 int esp_is_tx_queue_paused(struct esp_wifi_device *priv)
775 if (!priv || !priv->ndev)
779 !netif_queue_stopped((const struct net_device *)priv->ndev)))
784 void esp_tx_pause(struct esp_wifi_device *priv)
786 if (!priv || !priv->ndev)
789 if (!netif_queue_stopped((const struct net_device *)priv->ndev)) {
790 netif_stop_queue(priv->ndev);
794 void esp_tx_resume(struct esp_wifi_device *priv)
796 if (!priv || !priv->ndev)
799 if (netif_queue_stopped((const struct net_device *)priv->ndev)) {
800 netif_wake_queue(priv->ndev);
804 struct sk_buff *esp_alloc_skb(u32 len)
806 struct sk_buff *skb = NULL;
810 skb = netdev_alloc_skb(NULL, len + INTERFACE_HEADER_PADDING);
813 /* Align SKB data pointer */
814 offset = ((unsigned long)skb->data) & (SKB_DATA_ADDR_ALIGNMENT - 1);
817 skb_reserve(skb, INTERFACE_HEADER_PADDING - offset);
824 static int esp_get_packets(struct esp_adapter *adapter)
826 struct sk_buff *skb = NULL;
828 if (!adapter || !adapter->if_ops || !adapter->if_ops->read)
831 skb = adapter->if_ops->read(adapter);
836 process_rx_packet(adapter, skb);
841 int esp_send_packet(struct esp_adapter *adapter, struct sk_buff *skb)
843 if (!adapter || !adapter->if_ops || !adapter->if_ops->write) {
844 esp_err("%u adapter: %p\n", __LINE__, adapter);
848 return adapter->if_ops->write(adapter, skb);
851 static void esp_if_rx_work(struct work_struct *work)
853 /* read inbound packet and forward it to network/serial interface */
854 esp_get_packets(&adapter);
857 static void update_mac_filter(struct work_struct *work)
859 struct esp_adapter *adapter = esp_get_adapter();
860 struct esp_wifi_device *priv = adapter->priv[0];
861 struct net_device *ndev;
862 struct netdev_hw_addr *mac_addr;
872 if (!priv->port_open) {
873 esp_verbose("Port is not open yet, skipping mac filter update\n");
877 #if CONFIG_ALLOW_MULTICAST_WAKEUP
878 netdev_for_each_mc_addr(mac_addr, ndev) {
879 if (count < MAX_MULTICAST_ADDR_COUNT) {
880 esp_verbose("%d: "MACSTR"\n", count+1, MAC2STR(mac_addr->addr));
881 memcpy(&mcast_list.mcast_addr[count++], mac_addr->addr, ETH_ALEN);
885 mcast_list.priv = priv;
886 mcast_list.addr_count = count;
888 esp_verbose("Setting Multicast list\n");
889 cmd_set_mcast_mac_list(mcast_list.priv, &mcast_list);
891 esp_info("Not setting FW multicast addresses\n");
895 static void esp_events_work(struct work_struct *work)
897 struct sk_buff *skb = NULL;
899 skb = skb_dequeue(&adapter.events_skb_q);
903 process_internal_event(&adapter, skb);
904 dev_kfree_skb_any(skb);
907 static struct esp_adapter *init_adapter(void)
909 memset(&adapter, 0, sizeof(adapter));
911 /* Prepare interface RX work */
912 adapter.if_rx_workqueue = alloc_workqueue("ESP_IF_RX_WORK_QUEUE", 0, 0);
914 if (!adapter.if_rx_workqueue) {
919 INIT_WORK(&adapter.if_rx_work, esp_if_rx_work);
921 skb_queue_head_init(&adapter.events_skb_q);
923 adapter.events_wq = alloc_workqueue("ESP_EVENTS_WORKQUEUE", WQ_HIGHPRI, 0);
925 if (!adapter.events_wq) {
930 INIT_WORK(&adapter.events_work, esp_events_work);
932 INIT_WORK(&adapter.mac_flter_work, update_mac_filter);
937 static void deinit_adapter(void)
939 skb_queue_purge(&adapter.events_skb_q);
941 if (adapter.events_wq)
942 destroy_workqueue(adapter.events_wq);
944 if (adapter.if_rx_workqueue)
945 destroy_workqueue(adapter.if_rx_workqueue);
948 static void esp_reset(void)
950 if (resetpin != HOST_GPIO_PIN_INVALID) {
951 /* Check valid GPIO or not */
952 if (!gpio_is_valid(resetpin)) {
953 esp_warn("host resetpin (%d) configured is invalid GPIO\n", resetpin);
954 resetpin = HOST_GPIO_PIN_INVALID;
956 gpio_request(resetpin, "sysfs");
958 /* HOST's resetpin set to OUTPUT, HIGH */
959 gpio_direction_output(resetpin, true);
961 /* HOST's resetpin set to LOW */
962 gpio_set_value(resetpin, 0);
965 /* HOST's resetpin set to INPUT */
966 gpio_direction_input(resetpin);
968 esp_dbg("Triggering ESP reset.\n");
974 static int __init esp_init(void)
977 struct esp_adapter *adapter = NULL;
979 /* Reset ESP, Clean start ESP */
983 adapter = init_adapter();
988 /* Init transport layer */
989 ret = esp_init_interface_layer(adapter, clockspeed);
998 static void __exit esp_exit(void)
1000 uint8_t iface_idx = 0;
1002 if (raw_tp_mode != 0) {
1003 test_raw_tp_cleanup();
1006 for (iface_idx = 0; iface_idx < ESP_MAX_INTERFACE; iface_idx++) {
1007 cmd_deinit_interface(adapter.priv[iface_idx]);
1009 clear_bit(ESP_DRIVER_ACTIVE, &adapter.state_flags);
1011 esp_deinit_interface_layer();
1014 if (resetpin != HOST_GPIO_PIN_INVALID) {
1015 gpio_free(resetpin);
1018 MODULE_LICENSE("GPL");
1022 MODULE_DESCRIPTION("Wifi driver for ESP-Hosted solution");
1023 MODULE_VERSION(RELEASE_VERSION);
1024 module_init(esp_init);
1025 module_exit(esp_exit);