new file mode 100644
@@ -0,0 +1,1238 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
+ * All rights reserved.
+ */
+
+#include <linux/if_ether.h>
+#include <linux/ip.h>
+#include "cfg80211.h"
+#include "wlan_cfg.h"
+
+static inline bool is_wilc1000(u32 id)
+{
+ return (id & (~WILC_CHIP_REV_FIELD)) == WILC_1000_BASE_ID;
+}
+
+static inline void acquire_bus(struct wilc *wilc, enum bus_acquire acquire)
+{
+ mutex_lock(&wilc->hif_cs);
+ if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP)
+ chip_wakeup(wilc);
+}
+
+static inline void release_bus(struct wilc *wilc, enum bus_release release)
+{
+ if (release == WILC_BUS_RELEASE_ALLOW_SLEEP)
+ chip_allow_sleep(wilc);
+ mutex_unlock(&wilc->hif_cs);
+}
+
+static void wilc_wlan_txq_remove(struct wilc *wilc, struct txq_entry_t *tqe)
+{
+ list_del(&tqe->list);
+ wilc->txq_entries -= 1;
+}
+
+static struct txq_entry_t *
+wilc_wlan_txq_remove_from_head(struct net_device *dev)
+{
+ struct txq_entry_t *tqe = NULL;
+ unsigned long flags;
+ struct wilc_vif *vif = netdev_priv(dev);
+ struct wilc *wilc = vif->wilc;
+
+ spin_lock_irqsave(&wilc->txq_spinlock, flags);
+
+ if (!list_empty(&wilc->txq_head.list)) {
+ tqe = list_first_entry(&wilc->txq_head.list, struct txq_entry_t,
+ list);
+ list_del(&tqe->list);
+ wilc->txq_entries -= 1;
+ }
+ spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
+ return tqe;
+}
+
+static void wilc_wlan_txq_add_to_tail(struct net_device *dev,
+ struct txq_entry_t *tqe)
+{
+ unsigned long flags;
+ struct wilc_vif *vif = netdev_priv(dev);
+ struct wilc *wilc = vif->wilc;
+
+ spin_lock_irqsave(&wilc->txq_spinlock, flags);
+
+ list_add_tail(&tqe->list, &wilc->txq_head.list);
+ wilc->txq_entries += 1;
+
+ spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
+
+ complete(&wilc->txq_event);
+}
+
+static void wilc_wlan_txq_add_to_head(struct wilc_vif *vif,
+ struct txq_entry_t *tqe)
+{
+ unsigned long flags;
+ struct wilc *wilc = vif->wilc;
+
+ mutex_lock(&wilc->txq_add_to_head_cs);
+
+ spin_lock_irqsave(&wilc->txq_spinlock, flags);
+
+ list_add(&tqe->list, &wilc->txq_head.list);
+ wilc->txq_entries += 1;
+
+ spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
+ mutex_unlock(&wilc->txq_add_to_head_cs);
+ complete(&wilc->txq_event);
+}
+
+#define NOT_TCP_ACK (-1)
+
+static inline void add_tcp_session(struct wilc_vif *vif, u32 src_prt,
+ u32 dst_prt, u32 seq)
+{
+ struct tcp_ack_filter *f = &vif->ack_filter;
+
+ if (f->tcp_session < 2 * MAX_TCP_SESSION) {
+ f->ack_session_info[f->tcp_session].seq_num = seq;
+ f->ack_session_info[f->tcp_session].bigger_ack_num = 0;
+ f->ack_session_info[f->tcp_session].src_port = src_prt;
+ f->ack_session_info[f->tcp_session].dst_port = dst_prt;
+ f->tcp_session++;
+ }
+}
+
+static inline void update_tcp_session(struct wilc_vif *vif, u32 index, u32 ack)
+{
+ struct tcp_ack_filter *f = &vif->ack_filter;
+
+ if (index < 2 * MAX_TCP_SESSION &&
+ ack > f->ack_session_info[index].bigger_ack_num)
+ f->ack_session_info[index].bigger_ack_num = ack;
+}
+
+static inline void add_tcp_pending_ack(struct wilc_vif *vif, u32 ack,
+ u32 session_index,
+ struct txq_entry_t *txqe)
+{
+ struct tcp_ack_filter *f = &vif->ack_filter;
+ u32 i = f->pending_base + f->pending_acks_idx;
+
+ if (i < MAX_PENDING_ACKS) {
+ f->pending_acks[i].ack_num = ack;
+ f->pending_acks[i].txqe = txqe;
+ f->pending_acks[i].session_index = session_index;
+ txqe->ack_idx = i;
+ f->pending_acks_idx++;
+ }
+}
+
+static inline void tcp_process(struct net_device *dev, struct txq_entry_t *tqe)
+{
+ void *buffer = tqe->buffer;
+ const struct ethhdr *eth_hdr_ptr = buffer;
+ int i;
+ unsigned long flags;
+ struct wilc_vif *vif = netdev_priv(dev);
+ struct wilc *wilc = vif->wilc;
+ struct tcp_ack_filter *f = &vif->ack_filter;
+ const struct iphdr *ip_hdr_ptr;
+ const struct tcphdr *tcp_hdr_ptr;
+ u32 ihl, total_length, data_offset;
+
+ spin_lock_irqsave(&wilc->txq_spinlock, flags);
+
+ if (eth_hdr_ptr->h_proto != htons(ETH_P_IP))
+ goto out;
+
+ ip_hdr_ptr = buffer + ETH_HLEN;
+
+ if (ip_hdr_ptr->protocol != IPPROTO_TCP)
+ goto out;
+
+ ihl = ip_hdr_ptr->ihl << 2;
+ tcp_hdr_ptr = buffer + ETH_HLEN + ihl;
+ total_length = ntohs(ip_hdr_ptr->tot_len);
+
+ data_offset = tcp_hdr_ptr->doff << 2;
+ if (total_length == (ihl + data_offset)) {
+ u32 seq_no, ack_no;
+
+ seq_no = ntohl(tcp_hdr_ptr->seq);
+ ack_no = ntohl(tcp_hdr_ptr->ack_seq);
+ for (i = 0; i < f->tcp_session; i++) {
+ u32 j = f->ack_session_info[i].seq_num;
+
+ if (i < 2 * MAX_TCP_SESSION &&
+ j == seq_no) {
+ update_tcp_session(vif, i, ack_no);
+ break;
+ }
+ }
+ if (i == f->tcp_session)
+ add_tcp_session(vif, 0, 0, seq_no);
+
+ add_tcp_pending_ack(vif, ack_no, i, tqe);
+ }
+
+out:
+ spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
+}
+
+static void wilc_wlan_txq_filter_dup_tcp_ack(struct net_device *dev)
+{
+ struct wilc_vif *vif = netdev_priv(dev);
+ struct wilc *wilc = vif->wilc;
+ struct tcp_ack_filter *f = &vif->ack_filter;
+ u32 i = 0;
+ u32 dropped = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&wilc->txq_spinlock, flags);
+ for (i = f->pending_base;
+ i < (f->pending_base + f->pending_acks_idx); i++) {
+ u32 index;
+ u32 bigger_ack_num;
+
+ if (i >= MAX_PENDING_ACKS)
+ break;
+
+ index = f->pending_acks[i].session_index;
+
+ if (index >= 2 * MAX_TCP_SESSION)
+ break;
+
+ bigger_ack_num = f->ack_session_info[index].bigger_ack_num;
+
+ if (f->pending_acks[i].ack_num < bigger_ack_num) {
+ struct txq_entry_t *tqe;
+
+ tqe = f->pending_acks[i].txqe;
+ if (tqe) {
+ wilc_wlan_txq_remove(wilc, tqe);
+ tqe->status = 1;
+ if (tqe->tx_complete_func)
+ tqe->tx_complete_func(tqe->priv,
+ tqe->status);
+ kfree(tqe);
+ dropped++;
+ }
+ }
+ }
+ f->pending_acks_idx = 0;
+ f->tcp_session = 0;
+
+ if (f->pending_base == 0)
+ f->pending_base = MAX_TCP_SESSION;
+ else
+ f->pending_base = 0;
+
+ spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
+
+ while (dropped > 0) {
+ wait_for_completion_timeout(&wilc->txq_event,
+ msecs_to_jiffies(1));
+ dropped--;
+ }
+}
+
+void wilc_enable_tcp_ack_filter(struct wilc_vif *vif, bool value)
+{
+ vif->ack_filter.enabled = value;
+}
+
+static int wilc_wlan_txq_add_cfg_pkt(struct wilc_vif *vif, u8 *buffer,
+ u32 buffer_size)
+{
+ struct txq_entry_t *tqe;
+ struct wilc *wilc = vif->wilc;
+
+ netdev_dbg(vif->ndev, "Adding config packet ...\n");
+ if (wilc->quit) {
+ netdev_dbg(vif->ndev, "Return due to clear function\n");
+ complete(&wilc->cfg_event);
+ return 0;
+ }
+
+ tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
+ if (!tqe)
+ return 0;
+
+ tqe->type = WILC_CFG_PKT;
+ tqe->buffer = buffer;
+ tqe->buffer_size = buffer_size;
+ tqe->tx_complete_func = NULL;
+ tqe->priv = NULL;
+ tqe->ack_idx = NOT_TCP_ACK;
+ tqe->vif = vif;
+
+ wilc_wlan_txq_add_to_head(vif, tqe);
+
+ return 1;
+}
+
+int wilc_wlan_txq_add_net_pkt(struct net_device *dev, void *priv, u8 *buffer,
+ u32 buffer_size,
+ void (*tx_complete_fn)(void *, int))
+{
+ struct txq_entry_t *tqe;
+ struct wilc_vif *vif = netdev_priv(dev);
+ struct wilc *wilc;
+
+ wilc = vif->wilc;
+
+ if (wilc->quit)
+ return 0;
+
+ tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
+
+ if (!tqe)
+ return 0;
+ tqe->type = WILC_NET_PKT;
+ tqe->buffer = buffer;
+ tqe->buffer_size = buffer_size;
+ tqe->tx_complete_func = tx_complete_fn;
+ tqe->priv = priv;
+ tqe->vif = vif;
+
+ tqe->ack_idx = NOT_TCP_ACK;
+ if (vif->ack_filter.enabled)
+ tcp_process(dev, tqe);
+ wilc_wlan_txq_add_to_tail(dev, tqe);
+ return wilc->txq_entries;
+}
+
+int wilc_wlan_txq_add_mgmt_pkt(struct net_device *dev, void *priv, u8 *buffer,
+ u32 buffer_size,
+ void (*tx_complete_fn)(void *, int))
+{
+ struct txq_entry_t *tqe;
+ struct wilc_vif *vif = netdev_priv(dev);
+ struct wilc *wilc;
+
+ wilc = vif->wilc;
+
+ if (wilc->quit)
+ return 0;
+
+ tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
+
+ if (!tqe)
+ return 0;
+ tqe->type = WILC_MGMT_PKT;
+ tqe->buffer = buffer;
+ tqe->buffer_size = buffer_size;
+ tqe->tx_complete_func = tx_complete_fn;
+ tqe->priv = priv;
+ tqe->ack_idx = NOT_TCP_ACK;
+ tqe->vif = vif;
+ wilc_wlan_txq_add_to_tail(dev, tqe);
+ return 1;
+}
+
+static struct txq_entry_t *wilc_wlan_txq_get_first(struct wilc *wilc)
+{
+ struct txq_entry_t *tqe = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&wilc->txq_spinlock, flags);
+
+ if (!list_empty(&wilc->txq_head.list))
+ tqe = list_first_entry(&wilc->txq_head.list, struct txq_entry_t,
+ list);
+
+ spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
+
+ return tqe;
+}
+
+static struct txq_entry_t *wilc_wlan_txq_get_next(struct wilc *wilc,
+ struct txq_entry_t *tqe)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&wilc->txq_spinlock, flags);
+
+ if (!list_is_last(&tqe->list, &wilc->txq_head.list))
+ tqe = list_next_entry(tqe, list);
+ else
+ tqe = NULL;
+ spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
+
+ return tqe;
+}
+
+static void wilc_wlan_rxq_add(struct wilc *wilc, struct rxq_entry_t *rqe)
+{
+ if (wilc->quit)
+ return;
+
+ mutex_lock(&wilc->rxq_cs);
+ list_add_tail(&rqe->list, &wilc->rxq_head.list);
+ mutex_unlock(&wilc->rxq_cs);
+}
+
+static struct rxq_entry_t *wilc_wlan_rxq_remove(struct wilc *wilc)
+{
+ struct rxq_entry_t *rqe = NULL;
+
+ mutex_lock(&wilc->rxq_cs);
+ if (!list_empty(&wilc->rxq_head.list)) {
+ rqe = list_first_entry(&wilc->rxq_head.list, struct rxq_entry_t,
+ list);
+ list_del(&rqe->list);
+ }
+ mutex_unlock(&wilc->rxq_cs);
+ return rqe;
+}
+
+void chip_allow_sleep(struct wilc *wilc)
+{
+ u32 reg = 0;
+
+ wilc->hif_func->hif_read_reg(wilc, WILC_SDIO_WAKEUP_REG, ®);
+
+ wilc->hif_func->hif_write_reg(wilc, WILC_SDIO_WAKEUP_REG,
+ reg & ~WILC_SDIO_WAKEUP_BIT);
+ wilc->hif_func->hif_write_reg(wilc, WILC_SDIO_HOST_TO_FW_REG, 0);
+}
+EXPORT_SYMBOL_GPL(chip_allow_sleep);
+
+void chip_wakeup(struct wilc *wilc)
+{
+ u32 reg, clk_status_reg;
+ const struct wilc_hif_func *h = wilc->hif_func;
+
+ if (wilc->io_type == WILC_HIF_SPI) {
+ do {
+ h->hif_read_reg(wilc, WILC_SPI_WAKEUP_REG, ®);
+ h->hif_write_reg(wilc, WILC_SPI_WAKEUP_REG,
+ reg | WILC_SPI_WAKEUP_BIT);
+ h->hif_write_reg(wilc, WILC_SPI_WAKEUP_REG,
+ reg & ~WILC_SPI_WAKEUP_BIT);
+
+ do {
+ usleep_range(2000, 2500);
+ wilc_get_chipid(wilc, true);
+ } while (wilc_get_chipid(wilc, true) == 0);
+ } while (wilc_get_chipid(wilc, true) == 0);
+ } else if (wilc->io_type == WILC_HIF_SDIO) {
+ h->hif_write_reg(wilc, WILC_SDIO_HOST_TO_FW_REG,
+ WILC_SDIO_HOST_TO_FW_BIT);
+ usleep_range(200, 400);
+ h->hif_read_reg(wilc, WILC_SDIO_WAKEUP_REG, ®);
+ do {
+ h->hif_write_reg(wilc, WILC_SDIO_WAKEUP_REG,
+ reg | WILC_SDIO_WAKEUP_BIT);
+ h->hif_read_reg(wilc, WILC_SDIO_CLK_STATUS_REG,
+ &clk_status_reg);
+
+ while (!(clk_status_reg & WILC_SDIO_CLK_STATUS_BIT)) {
+ usleep_range(2000, 2500);
+
+ h->hif_read_reg(wilc, WILC_SDIO_CLK_STATUS_REG,
+ &clk_status_reg);
+ }
+ if (!(clk_status_reg & WILC_SDIO_CLK_STATUS_BIT)) {
+ h->hif_write_reg(wilc, WILC_SDIO_WAKEUP_REG,
+ reg & ~WILC_SDIO_WAKEUP_BIT);
+ }
+ } while (!(clk_status_reg & WILC_SDIO_CLK_STATUS_BIT));
+ }
+
+ if (wilc->chip_ps_state == WILC_CHIP_SLEEPING_MANUAL) {
+ if (wilc_get_chipid(wilc, false) < WILC_1000_BASE_ID_2B) {
+ u32 val32;
+
+ h->hif_read_reg(wilc, WILC_REG_4_TO_1_RX, &val32);
+ val32 |= BIT(6);
+ h->hif_write_reg(wilc, WILC_REG_4_TO_1_RX, val32);
+
+ h->hif_read_reg(wilc, WILC_REG_4_TO_1_TX_BANK0, &val32);
+ val32 |= BIT(6);
+ h->hif_write_reg(wilc, WILC_REG_4_TO_1_TX_BANK0, val32);
+ }
+ }
+ wilc->chip_ps_state = WILC_CHIP_WAKEDUP;
+}
+EXPORT_SYMBOL_GPL(chip_wakeup);
+
+void host_wakeup_notify(struct wilc *wilc)
+{
+ acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+ wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_2, 1);
+ release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+}
+EXPORT_SYMBOL_GPL(host_wakeup_notify);
+
+void host_sleep_notify(struct wilc *wilc)
+{
+ acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+ wilc->hif_func->hif_write_reg(wilc, WILC_CORTUS_INTERRUPT_1, 1);
+ release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+}
+EXPORT_SYMBOL_GPL(host_sleep_notify);
+
+int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
+{
+ int i, entries = 0;
+ u32 sum;
+ u32 reg;
+ u32 offset = 0;
+ int vmm_sz = 0;
+ struct txq_entry_t *tqe;
+ int ret = 0;
+ int counter;
+ int timeout;
+ u32 vmm_table[WILC_VMM_TBL_SIZE];
+ const struct wilc_hif_func *func;
+ u8 *txb = wilc->tx_buffer;
+ struct net_device *dev;
+ struct wilc_vif *vif;
+
+ if (wilc->quit)
+ goto out_update_cnt;
+
+ mutex_lock(&wilc->txq_add_to_head_cs);
+ tqe = wilc_wlan_txq_get_first(wilc);
+ if (!tqe)
+ goto out_unlock;
+ dev = tqe->vif->ndev;
+ wilc_wlan_txq_filter_dup_tcp_ack(dev);
+ i = 0;
+ sum = 0;
+ while (tqe && (i < (WILC_VMM_TBL_SIZE - 1))) {
+ if (tqe->type == WILC_CFG_PKT)
+ vmm_sz = ETH_CONFIG_PKT_HDR_OFFSET;
+ else if (tqe->type == WILC_NET_PKT)
+ vmm_sz = ETH_ETHERNET_HDR_OFFSET;
+ else
+ vmm_sz = HOST_HDR_OFFSET;
+
+ vmm_sz += tqe->buffer_size;
+ vmm_sz = ALIGN(vmm_sz, 4);
+
+ if ((sum + vmm_sz) > WILC_TX_BUFF_SIZE)
+ break;
+
+ vmm_table[i] = vmm_sz / 4;
+ if (tqe->type == WILC_CFG_PKT)
+ vmm_table[i] |= BIT(10);
+ cpu_to_le32s(&vmm_table[i]);
+
+ i++;
+ sum += vmm_sz;
+ tqe = wilc_wlan_txq_get_next(wilc, tqe);
+ }
+
+ if (i == 0)
+ goto out_unlock;
+ vmm_table[i] = 0x0;
+
+ acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ counter = 0;
+ func = wilc->hif_func;
+ do {
+ ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, ®);
+ if (ret)
+ break;
+
+ if ((reg & 0x1) == 0)
+ break;
+
+ counter++;
+ if (counter > 200) {
+ counter = 0;
+ ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, 0);
+ break;
+ }
+ } while (!wilc->quit);
+
+ if (ret)
+ goto out_release_bus;
+
+ timeout = 200;
+ do {
+ ret = func->hif_block_tx(wilc,
+ WILC_VMM_TBL_RX_SHADOW_BASE,
+ (u8 *)vmm_table,
+ ((i + 1) * 4));
+ if (ret)
+ break;
+
+ ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x2);
+ if (ret)
+ break;
+
+ do {
+ ret = func->hif_read_reg(wilc, WILC_HOST_VMM_CTL, ®);
+ if (ret)
+ break;
+ if (FIELD_GET(WILC_VMM_ENTRY_AVAILABLE, reg)) {
+ entries = FIELD_GET(WILC_VMM_ENTRY_COUNT, reg);
+ break;
+ }
+ } while (--timeout);
+ if (timeout <= 0) {
+ ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x0);
+ break;
+ }
+
+ if (ret)
+ break;
+
+ if (entries == 0) {
+ ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, ®);
+ if (ret)
+ break;
+ reg &= ~BIT(0);
+ ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, reg);
+ }
+ } while (0);
+
+ if (ret)
+ goto out_release_bus;
+
+ if (entries == 0) {
+ /*
+ * No VMM space available in firmware so retry to transmit
+ * the packet from tx queue.
+ */
+ ret = WILC_VMM_ENTRY_FULL_RETRY;
+ goto out_release_bus;
+ }
+
+ release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+
+ offset = 0;
+ i = 0;
+ do {
+ u32 header, buffer_offset;
+ char *bssid;
+ u8 mgmt_ptk = 0;
+
+ tqe = wilc_wlan_txq_remove_from_head(dev);
+ if (!tqe)
+ break;
+
+ vif = tqe->vif;
+ if (vmm_table[i] == 0)
+ break;
+
+ le32_to_cpus(&vmm_table[i]);
+ vmm_sz = FIELD_GET(WILC_VMM_BUFFER_SIZE, vmm_table[i]);
+ vmm_sz *= 4;
+
+ if (tqe->type == WILC_MGMT_PKT)
+ mgmt_ptk = 1;
+
+ header = (FIELD_PREP(WILC_VMM_HDR_TYPE, tqe->type) |
+ FIELD_PREP(WILC_VMM_HDR_MGMT_FIELD, mgmt_ptk) |
+ FIELD_PREP(WILC_VMM_HDR_PKT_SIZE, tqe->buffer_size) |
+ FIELD_PREP(WILC_VMM_HDR_BUFF_SIZE, vmm_sz));
+
+ cpu_to_le32s(&header);
+ memcpy(&txb[offset], &header, 4);
+ if (tqe->type == WILC_CFG_PKT) {
+ buffer_offset = ETH_CONFIG_PKT_HDR_OFFSET;
+ } else if (tqe->type == WILC_NET_PKT) {
+ bssid = tqe->vif->bssid;
+ buffer_offset = ETH_ETHERNET_HDR_OFFSET;
+ memcpy(&txb[offset + 8], bssid, 6);
+ } else {
+ buffer_offset = HOST_HDR_OFFSET;
+ }
+
+ memcpy(&txb[offset + buffer_offset],
+ tqe->buffer, tqe->buffer_size);
+ offset += vmm_sz;
+ i++;
+ tqe->status = 1;
+ if (tqe->tx_complete_func)
+ tqe->tx_complete_func(tqe->priv, tqe->status);
+ if (tqe->ack_idx != NOT_TCP_ACK &&
+ tqe->ack_idx < MAX_PENDING_ACKS)
+ vif->ack_filter.pending_acks[tqe->ack_idx].txqe = NULL;
+ kfree(tqe);
+ } while (--entries);
+
+ acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+
+ ret = func->hif_clear_int_ext(wilc, ENABLE_TX_VMM);
+ if (ret)
+ goto out_release_bus;
+
+ ret = func->hif_block_tx_ext(wilc, 0, txb, offset);
+
+out_release_bus:
+ release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+
+out_unlock:
+ mutex_unlock(&wilc->txq_add_to_head_cs);
+
+out_update_cnt:
+ *txq_count = wilc->txq_entries;
+ return ret;
+}
+
+static void wilc_wlan_handle_rx_buff(struct wilc *wilc, u8 *buffer, int size)
+{
+ int offset = 0;
+ u32 header;
+ u32 pkt_len, pkt_offset, tp_len;
+ int is_cfg_packet;
+ u8 *buff_ptr;
+
+ do {
+ buff_ptr = buffer + offset;
+ header = get_unaligned_le32(buff_ptr);
+
+ is_cfg_packet = FIELD_GET(WILC_PKT_HDR_CONFIG_FIELD, header);
+ pkt_offset = FIELD_GET(WILC_PKT_HDR_OFFSET_FIELD, header);
+ tp_len = FIELD_GET(WILC_PKT_HDR_TOTAL_LEN_FIELD, header);
+ pkt_len = FIELD_GET(WILC_PKT_HDR_LEN_FIELD, header);
+
+ if (pkt_len == 0 || tp_len == 0)
+ break;
+
+ if (pkt_offset & IS_MANAGMEMENT) {
+ buff_ptr += HOST_HDR_OFFSET;
+ wilc_wfi_mgmt_rx(wilc, buff_ptr, pkt_len);
+ } else {
+ if (!is_cfg_packet) {
+ wilc_frmw_to_host(wilc, buff_ptr, pkt_len,
+ pkt_offset);
+ } else {
+ struct wilc_cfg_rsp rsp;
+
+ buff_ptr += pkt_offset;
+
+ wilc_wlan_cfg_indicate_rx(wilc, buff_ptr,
+ pkt_len,
+ &rsp);
+ if (rsp.type == WILC_CFG_RSP) {
+ if (wilc->cfg_seq_no == rsp.seq_no)
+ complete(&wilc->cfg_event);
+ } else if (rsp.type == WILC_CFG_RSP_STATUS) {
+ wilc_mac_indicate(wilc);
+ }
+ }
+ }
+ offset += tp_len;
+ } while (offset < size);
+}
+
+static void wilc_wlan_handle_rxq(struct wilc *wilc)
+{
+ int size;
+ u8 *buffer;
+ struct rxq_entry_t *rqe;
+
+ while (!wilc->quit) {
+ rqe = wilc_wlan_rxq_remove(wilc);
+ if (!rqe)
+ break;
+
+ buffer = rqe->buffer;
+ size = rqe->buffer_size;
+ wilc_wlan_handle_rx_buff(wilc, buffer, size);
+
+ kfree(rqe);
+ }
+ if (wilc->quit)
+ complete(&wilc->cfg_event);
+}
+
+static void wilc_unknown_isr_ext(struct wilc *wilc)
+{
+ wilc->hif_func->hif_clear_int_ext(wilc, 0);
+}
+
+static void wilc_wlan_handle_isr_ext(struct wilc *wilc, u32 int_status)
+{
+ u32 offset = wilc->rx_buffer_offset;
+ u8 *buffer = NULL;
+ u32 size;
+ u32 retries = 0;
+ int ret = 0;
+ struct rxq_entry_t *rqe;
+
+ size = FIELD_GET(WILC_INTERRUPT_DATA_SIZE, int_status) << 2;
+
+ while (!size && retries < 10) {
+ wilc->hif_func->hif_read_size(wilc, &size);
+ size = FIELD_GET(WILC_INTERRUPT_DATA_SIZE, size) << 2;
+ retries++;
+ }
+
+ if (size <= 0)
+ return;
+
+ if (WILC_RX_BUFF_SIZE - offset < size)
+ offset = 0;
+
+ buffer = &wilc->rx_buffer[offset];
+
+ wilc->hif_func->hif_clear_int_ext(wilc, DATA_INT_CLR | ENABLE_RX_VMM);
+ ret = wilc->hif_func->hif_block_rx_ext(wilc, 0, buffer, size);
+ if (ret)
+ return;
+
+ offset += size;
+ wilc->rx_buffer_offset = offset;
+ rqe = kmalloc(sizeof(*rqe), GFP_KERNEL);
+ if (!rqe)
+ return;
+
+ rqe->buffer = buffer;
+ rqe->buffer_size = size;
+ wilc_wlan_rxq_add(wilc, rqe);
+ wilc_wlan_handle_rxq(wilc);
+}
+
+void wilc_handle_isr(struct wilc *wilc)
+{
+ u32 int_status;
+
+ acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+ wilc->hif_func->hif_read_int(wilc, &int_status);
+
+ if (int_status & DATA_INT_EXT)
+ wilc_wlan_handle_isr_ext(wilc, int_status);
+
+ if (!(int_status & (ALL_INT_EXT)))
+ wilc_unknown_isr_ext(wilc);
+
+ release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+}
+EXPORT_SYMBOL_GPL(wilc_handle_isr);
+
+int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
+ u32 buffer_size)
+{
+ u32 offset;
+ u32 addr, size, size2, blksz;
+ u8 *dma_buffer;
+ int ret = 0;
+
+ blksz = BIT(12);
+
+ dma_buffer = kmalloc(blksz, GFP_KERNEL);
+ if (!dma_buffer)
+ return -EIO;
+
+ offset = 0;
+ do {
+ addr = get_unaligned_le32(&buffer[offset]);
+ size = get_unaligned_le32(&buffer[offset + 4]);
+ acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+ offset += 8;
+ while (((int)size) && (offset < buffer_size)) {
+ if (size <= blksz)
+ size2 = size;
+ else
+ size2 = blksz;
+
+ memcpy(dma_buffer, &buffer[offset], size2);
+ ret = wilc->hif_func->hif_block_tx(wilc, addr,
+ dma_buffer, size2);
+ if (ret)
+ break;
+
+ addr += size2;
+ offset += size2;
+ size -= size2;
+ }
+ release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+
+ if (ret)
+ goto fail;
+ } while (offset < buffer_size);
+
+fail:
+
+ kfree(dma_buffer);
+
+ return ret;
+}
+
+int wilc_wlan_start(struct wilc *wilc)
+{
+ u32 reg = 0;
+ int ret;
+ u32 chipid;
+
+ if (wilc->io_type == WILC_HIF_SDIO) {
+ reg = 0;
+ reg |= BIT(3);
+ } else if (wilc->io_type == WILC_HIF_SPI) {
+ reg = 1;
+ }
+ acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+ ret = wilc->hif_func->hif_write_reg(wilc, WILC_VMM_CORE_CFG, reg);
+ if (ret) {
+ release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+ return ret;
+ }
+ reg = 0;
+ if (wilc->io_type == WILC_HIF_SDIO && wilc->dev_irq_num)
+ reg |= WILC_HAVE_SDIO_IRQ_GPIO;
+
+ ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_1, reg);
+ if (ret) {
+ release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+ return ret;
+ }
+
+ wilc->hif_func->hif_sync_ext(wilc, NUM_INT_EXT);
+
+ ret = wilc->hif_func->hif_read_reg(wilc, WILC_CHIPID, &chipid);
+ if (ret) {
+ release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+ return ret;
+ }
+
+ wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®);
+ if ((reg & BIT(10)) == BIT(10)) {
+ reg &= ~BIT(10);
+ wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
+ wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®);
+ }
+
+ reg |= BIT(10);
+ ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
+ wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®);
+ release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+
+ return ret;
+}
+
+int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif)
+{
+ u32 reg = 0;
+ int ret;
+
+ acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
+
+ ret = wilc->hif_func->hif_read_reg(wilc, WILC_GP_REG_0, ®);
+ if (ret) {
+ netdev_err(vif->ndev, "Error while reading reg\n");
+ release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ return ret;
+ }
+
+ ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_0,
+ (reg | WILC_ABORT_REQ_BIT));
+ if (ret) {
+ netdev_err(vif->ndev, "Error while writing reg\n");
+ release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ return ret;
+ }
+
+ ret = wilc->hif_func->hif_read_reg(wilc, WILC_FW_HOST_COMM, ®);
+ if (ret) {
+ netdev_err(vif->ndev, "Error while reading reg\n");
+ release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ return ret;
+ }
+ reg = BIT(0);
+
+ ret = wilc->hif_func->hif_write_reg(wilc, WILC_FW_HOST_COMM, reg);
+ if (ret) {
+ netdev_err(vif->ndev, "Error while writing reg\n");
+ release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+ return ret;
+ }
+
+ release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
+
+ return 0;
+}
+
+void wilc_wlan_cleanup(struct net_device *dev)
+{
+ struct txq_entry_t *tqe;
+ struct rxq_entry_t *rqe;
+ struct wilc_vif *vif = netdev_priv(dev);
+ struct wilc *wilc = vif->wilc;
+
+ wilc->quit = 1;
+ while ((tqe = wilc_wlan_txq_remove_from_head(dev))) {
+ if (tqe->tx_complete_func)
+ tqe->tx_complete_func(tqe->priv, 0);
+ kfree(tqe);
+ }
+
+ while ((rqe = wilc_wlan_rxq_remove(wilc)))
+ kfree(rqe);
+
+ kfree(wilc->rx_buffer);
+ wilc->rx_buffer = NULL;
+ kfree(wilc->tx_buffer);
+ wilc->tx_buffer = NULL;
+ wilc->hif_func->hif_deinit(NULL);
+}
+
+static int wilc_wlan_cfg_commit(struct wilc_vif *vif, int type,
+ u32 drv_handler)
+{
+ struct wilc *wilc = vif->wilc;
+ struct wilc_cfg_frame *cfg = &wilc->cfg_frame;
+ int t_len = wilc->cfg_frame_offset + sizeof(struct wilc_cfg_cmd_hdr);
+
+ if (type == WILC_CFG_SET)
+ cfg->hdr.cmd_type = 'W';
+ else
+ cfg->hdr.cmd_type = 'Q';
+
+ cfg->hdr.seq_no = wilc->cfg_seq_no % 256;
+ cfg->hdr.total_len = cpu_to_le16(t_len);
+ cfg->hdr.driver_handler = cpu_to_le32(drv_handler);
+ wilc->cfg_seq_no = cfg->hdr.seq_no;
+
+ if (!wilc_wlan_txq_add_cfg_pkt(vif, (u8 *)&cfg->hdr, t_len))
+ return -1;
+
+ return 0;
+}
+
+int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
+ u32 buffer_size, int commit, u32 drv_handler)
+{
+ u32 offset;
+ int ret_size;
+ struct wilc *wilc = vif->wilc;
+
+ mutex_lock(&wilc->cfg_cmd_lock);
+
+ if (start)
+ wilc->cfg_frame_offset = 0;
+
+ offset = wilc->cfg_frame_offset;
+ ret_size = wilc_wlan_cfg_set_wid(wilc->cfg_frame.frame, offset,
+ wid, buffer, buffer_size);
+ offset += ret_size;
+ wilc->cfg_frame_offset = offset;
+
+ if (!commit) {
+ mutex_unlock(&wilc->cfg_cmd_lock);
+ return ret_size;
+ }
+
+ netdev_dbg(vif->ndev, "%s: seqno[%d]\n", __func__, wilc->cfg_seq_no);
+
+ if (wilc_wlan_cfg_commit(vif, WILC_CFG_SET, drv_handler))
+ ret_size = 0;
+
+ if (!wait_for_completion_timeout(&wilc->cfg_event,
+ WILC_CFG_PKTS_TIMEOUT)) {
+ netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
+ ret_size = 0;
+ }
+
+ wilc->cfg_frame_offset = 0;
+ wilc->cfg_seq_no += 1;
+ mutex_unlock(&wilc->cfg_cmd_lock);
+
+ return ret_size;
+}
+
+int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
+ u32 drv_handler)
+{
+ u32 offset;
+ int ret_size;
+ struct wilc *wilc = vif->wilc;
+
+ mutex_lock(&wilc->cfg_cmd_lock);
+
+ if (start)
+ wilc->cfg_frame_offset = 0;
+
+ offset = wilc->cfg_frame_offset;
+ ret_size = wilc_wlan_cfg_get_wid(wilc->cfg_frame.frame, offset, wid);
+ offset += ret_size;
+ wilc->cfg_frame_offset = offset;
+
+ if (!commit) {
+ mutex_unlock(&wilc->cfg_cmd_lock);
+ return ret_size;
+ }
+
+ if (wilc_wlan_cfg_commit(vif, WILC_CFG_QUERY, drv_handler))
+ ret_size = 0;
+
+ if (!wait_for_completion_timeout(&wilc->cfg_event,
+ WILC_CFG_PKTS_TIMEOUT)) {
+ netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
+ ret_size = 0;
+ }
+ wilc->cfg_frame_offset = 0;
+ wilc->cfg_seq_no += 1;
+ mutex_unlock(&wilc->cfg_cmd_lock);
+
+ return ret_size;
+}
+
+int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
+ u32 count)
+{
+ int i;
+ int ret = 0;
+ u32 drv = wilc_get_vif_idx(vif);
+
+ if (mode == WILC_GET_CFG) {
+ for (i = 0; i < count; i++) {
+ if (!wilc_wlan_cfg_get(vif, !i,
+ wids[i].id,
+ (i == count - 1),
+ drv)) {
+ ret = -ETIMEDOUT;
+ break;
+ }
+ }
+ for (i = 0; i < count; i++) {
+ wids[i].size = wilc_wlan_cfg_get_val(vif->wilc,
+ wids[i].id,
+ wids[i].val,
+ wids[i].size);
+ }
+ } else if (mode == WILC_SET_CFG) {
+ for (i = 0; i < count; i++) {
+ if (!wilc_wlan_cfg_set(vif, !i,
+ wids[i].id,
+ wids[i].val,
+ wids[i].size,
+ (i == count - 1),
+ drv)) {
+ ret = -ETIMEDOUT;
+ break;
+ }
+ }
+ }
+
+ return ret;
+}
+
+static int init_chip(struct net_device *dev)
+{
+ u32 chipid;
+ u32 reg;
+ int ret = 0;
+ struct wilc_vif *vif = netdev_priv(dev);
+ struct wilc *wilc = vif->wilc;
+
+ acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
+
+ chipid = wilc_get_chipid(wilc, true);
+
+ if ((chipid & 0xfff) != 0xa0) {
+ ret = wilc->hif_func->hif_read_reg(wilc,
+ WILC_CORTUS_RESET_MUX_SEL,
+ ®);
+ if (ret) {
+ netdev_err(dev, "fail read reg 0x1118\n");
+ goto release;
+ }
+ reg |= BIT(0);
+ ret = wilc->hif_func->hif_write_reg(wilc,
+ WILC_CORTUS_RESET_MUX_SEL,
+ reg);
+ if (ret) {
+ netdev_err(dev, "fail write reg 0x1118\n");
+ goto release;
+ }
+ ret = wilc->hif_func->hif_write_reg(wilc,
+ WILC_CORTUS_BOOT_REGISTER,
+ WILC_CORTUS_BOOT_FROM_IRAM);
+ if (ret) {
+ netdev_err(dev, "fail write reg 0xc0000\n");
+ goto release;
+ }
+ }
+
+release:
+ release_bus(wilc, WILC_BUS_RELEASE_ONLY);
+
+ return ret;
+}
+
+u32 wilc_get_chipid(struct wilc *wilc, bool update)
+{
+ static u32 chipid;
+ u32 tempchipid = 0;
+ u32 rfrevid = 0;
+
+ if (chipid == 0 || update) {
+ wilc->hif_func->hif_read_reg(wilc, WILC_CHIPID, &tempchipid);
+ wilc->hif_func->hif_read_reg(wilc, WILC_RF_REVISION_ID,
+ &rfrevid);
+ if (!is_wilc1000(tempchipid)) {
+ chipid = 0;
+ return chipid;
+ }
+ if (tempchipid == WILC_1000_BASE_ID_2A) { /* 0x1002A0 */
+ if (rfrevid != 0x1)
+ tempchipid = WILC_1000_BASE_ID_2A_REV1;
+ } else if (tempchipid == WILC_1000_BASE_ID_2B) { /* 0x1002B0 */
+ if (rfrevid == 0x4)
+ tempchipid = WILC_1000_BASE_ID_2B_REV1;
+ else if (rfrevid != 0x3)
+ tempchipid = WILC_1000_BASE_ID_2B_REV2;
+ }
+
+ chipid = tempchipid;
+ }
+ return chipid;
+}
+
+int wilc_wlan_init(struct net_device *dev)
+{
+ int ret = 0;
+ struct wilc_vif *vif = netdev_priv(dev);
+ struct wilc *wilc;
+
+ wilc = vif->wilc;
+
+ wilc->quit = 0;
+
+ if (wilc->hif_func->hif_init(wilc, false)) {
+ ret = -EIO;
+ goto fail;
+ }
+
+ if (!wilc->tx_buffer)
+ wilc->tx_buffer = kmalloc(WILC_TX_BUFF_SIZE, GFP_KERNEL);
+
+ if (!wilc->tx_buffer) {
+ ret = -ENOBUFS;
+ goto fail;
+ }
+
+ if (!wilc->rx_buffer)
+ wilc->rx_buffer = kmalloc(WILC_RX_BUFF_SIZE, GFP_KERNEL);
+
+ if (!wilc->rx_buffer) {
+ ret = -ENOBUFS;
+ goto fail;
+ }
+
+ if (init_chip(dev)) {
+ ret = -EIO;
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+
+ kfree(wilc->rx_buffer);
+ wilc->rx_buffer = NULL;
+ kfree(wilc->tx_buffer);
+ wilc->tx_buffer = NULL;
+
+ return ret;
+}