drivers/staging/wilc1000/wilc_wlan.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
   4  * All rights reserved.
   5  */
   6
   7 #include <linux/if_ether.h>
   8 #include <linux/ip.h>
   9 #include "wilc_wfi_cfgoperations.h"
  10 #include "wilc_wlan_cfg.h"
  11
  12 static inline bool is_wilc1000(u32 id)
  13 {
  14         return (id & 0xfffff000) == 0x100000;
  15 }
  16
  17 static inline void acquire_bus(struct wilc *wilc, enum bus_acquire acquire)
  18 {
  19         mutex_lock(&wilc->hif_cs);
  20         if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP)
  21                 chip_wakeup(wilc);
  22 }
  23
  24 static inline void release_bus(struct wilc *wilc, enum bus_release release)
  25 {
  26         if (release == WILC_BUS_RELEASE_ALLOW_SLEEP)
  27                 chip_allow_sleep(wilc);
  28         mutex_unlock(&wilc->hif_cs);
  29 }
  30
  31 static void wilc_wlan_txq_remove(struct wilc *wilc, struct txq_entry_t *tqe)
  32 {
  33         list_del(&tqe->list);
  34         wilc->txq_entries -= 1;
  35 }
  36
  37 static struct txq_entry_t *
  38 wilc_wlan_txq_remove_from_head(struct net_device *dev)
  39 {
  40         struct txq_entry_t *tqe = NULL;
  41         unsigned long flags;
  42         struct wilc_vif *vif = netdev_priv(dev);
  43         struct wilc *wilc = vif->wilc;
  44
  45         spin_lock_irqsave(&wilc->txq_spinlock, flags);
  46
  47         if (!list_empty(&wilc->txq_head.list)) {
  48                 tqe = list_first_entry(&wilc->txq_head.list, struct txq_entry_t,
  49                                        list);
  50                 list_del(&tqe->list);
  51                 wilc->txq_entries -= 1;
  52         }
  53         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
  54         return tqe;
  55 }
  56
  57 static void wilc_wlan_txq_add_to_tail(struct net_device *dev,
  58                                       struct txq_entry_t *tqe)
  59 {
  60         unsigned long flags;
  61         struct wilc_vif *vif = netdev_priv(dev);
  62         struct wilc *wilc = vif->wilc;
  63
  64         spin_lock_irqsave(&wilc->txq_spinlock, flags);
  65
  66         list_add_tail(&tqe->list, &wilc->txq_head.list);
  67         wilc->txq_entries += 1;
  68
  69         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
  70
  71         complete(&wilc->txq_event);
  72 }
  73
  74 static void wilc_wlan_txq_add_to_head(struct wilc_vif *vif,
  75                                       struct txq_entry_t *tqe)
  76 {
  77         unsigned long flags;
  78         struct wilc *wilc = vif->wilc;
  79
  80         mutex_lock(&wilc->txq_add_to_head_cs);
  81
  82         spin_lock_irqsave(&wilc->txq_spinlock, flags);
  83
  84         list_add(&tqe->list, &wilc->txq_head.list);
  85         wilc->txq_entries += 1;
  86
  87         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
  88         mutex_unlock(&wilc->txq_add_to_head_cs);
  89         complete(&wilc->txq_event);
  90 }
  91
  92 #define NOT_TCP_ACK                     (-1)
  93
  94 static inline void add_tcp_session(struct wilc_vif *vif, u32 src_prt,
  95                                    u32 dst_prt, u32 seq)
  96 {
  97         struct tcp_ack_filter *f = &vif->ack_filter;
  98
  99         if (f->tcp_session < 2 * MAX_TCP_SESSION) {
 100                 f->ack_session_info[f->tcp_session].seq_num = seq;
 101                 f->ack_session_info[f->tcp_session].bigger_ack_num = 0;
 102                 f->ack_session_info[f->tcp_session].src_port = src_prt;
 103                 f->ack_session_info[f->tcp_session].dst_port = dst_prt;
 104                 f->tcp_session++;
 105         }
 106 }
 107
 108 static inline void update_tcp_session(struct wilc_vif *vif, u32 index, u32 ack)
 109 {
 110         struct tcp_ack_filter *f = &vif->ack_filter;
 111
 112         if (index < 2 * MAX_TCP_SESSION &&
 113             ack > f->ack_session_info[index].bigger_ack_num)
 114                 f->ack_session_info[index].bigger_ack_num = ack;
 115 }
 116
 117 static inline void add_tcp_pending_ack(struct wilc_vif *vif, u32 ack,
 118                                        u32 session_index,
 119                                        struct txq_entry_t *txqe)
 120 {
 121         struct tcp_ack_filter *f = &vif->ack_filter;
 122         u32 i = f->pending_base + f->pending_acks_idx;
 123
 124         if (i < MAX_PENDING_ACKS) {
 125                 f->pending_acks[i].ack_num = ack;
 126                 f->pending_acks[i].txqe = txqe;
 127                 f->pending_acks[i].session_index = session_index;
 128                 txqe->ack_idx = i;
 129                 f->pending_acks_idx++;
 130         }
 131 }
 132
 133 static inline void tcp_process(struct net_device *dev, struct txq_entry_t *tqe)
 134 {
 135         void *buffer = tqe->buffer;
 136         const struct ethhdr *eth_hdr_ptr = buffer;
 137         int i;
 138         unsigned long flags;
 139         struct wilc_vif *vif = netdev_priv(dev);
 140         struct wilc *wilc = vif->wilc;
 141         struct tcp_ack_filter *f = &vif->ack_filter;
 142         const struct iphdr *ip_hdr_ptr;
 143         const struct tcphdr *tcp_hdr_ptr;
 144         u32 ihl, total_length, data_offset;
 145
 146         spin_lock_irqsave(&wilc->txq_spinlock, flags);
 147
 148         if (eth_hdr_ptr->h_proto != htons(ETH_P_IP))
 149                 goto out;
 150
 151         ip_hdr_ptr = buffer + ETH_HLEN;
 152
 153         if (ip_hdr_ptr->protocol != IPPROTO_TCP)
 154                 goto out;
 155
 156         ihl = ip_hdr_ptr->ihl << 2;
 157         tcp_hdr_ptr = buffer + ETH_HLEN + ihl;
 158         total_length = ntohs(ip_hdr_ptr->tot_len);
 159
 160         data_offset = tcp_hdr_ptr->doff << 2;
 161         if (total_length == (ihl + data_offset)) {
 162                 u32 seq_no, ack_no;
 163
 164                 seq_no = ntohl(tcp_hdr_ptr->seq);
 165                 ack_no = ntohl(tcp_hdr_ptr->ack_seq);
 166                 for (i = 0; i < f->tcp_session; i++) {
 167                         u32 j = f->ack_session_info[i].seq_num;
 168
 169                         if (i < 2 * MAX_TCP_SESSION &&
 170                             j == seq_no) {
 171                                 update_tcp_session(vif, i, ack_no);
 172                                 break;
 173                         }
 174                 }
 175                 if (i == f->tcp_session)
 176                         add_tcp_session(vif, 0, 0, seq_no);
 177
 178                 add_tcp_pending_ack(vif, ack_no, i, tqe);
 179         }
 180
 181 out:
 182         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
 183 }
 184
 185 static void wilc_wlan_txq_filter_dup_tcp_ack(struct net_device *dev)
 186 {
 187         struct wilc_vif *vif = netdev_priv(dev);
 188         struct wilc *wilc = vif->wilc;
 189         struct tcp_ack_filter *f = &vif->ack_filter;
 190         u32 i = 0;
 191         u32 dropped = 0;
 192         unsigned long flags;
 193
 194         spin_lock_irqsave(&wilc->txq_spinlock, flags);
 195         for (i = f->pending_base;
 196              i < (f->pending_base + f->pending_acks_idx); i++) {
 197                 u32 index;
 198                 u32 bigger_ack_num;
 199
 200                 if (i >= MAX_PENDING_ACKS)
 201                         break;
 202
 203                 index = f->pending_acks[i].session_index;
 204
 205                 if (index >= 2 * MAX_TCP_SESSION)
 206                         break;
 207
 208                 bigger_ack_num = f->ack_session_info[index].bigger_ack_num;
 209
 210                 if (f->pending_acks[i].ack_num < bigger_ack_num) {
 211                         struct txq_entry_t *tqe;
 212
 213                         tqe = f->pending_acks[i].txqe;
 214                         if (tqe) {
 215                                 wilc_wlan_txq_remove(wilc, tqe);
 216                                 tqe->status = 1;
 217                                 if (tqe->tx_complete_func)
 218                                         tqe->tx_complete_func(tqe->priv,
 219                                                               tqe->status);
 220                                 kfree(tqe);
 221                                 dropped++;
 222                         }
 223                 }
 224         }
 225         f->pending_acks_idx = 0;
 226         f->tcp_session = 0;
 227
 228         if (f->pending_base == 0)
 229                 f->pending_base = MAX_TCP_SESSION;
 230         else
 231                 f->pending_base = 0;
 232
 233         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
 234
 235         while (dropped > 0) {
 236                 wait_for_completion_timeout(&wilc->txq_event,
 237                                             msecs_to_jiffies(1));
 238                 dropped--;
 239         }
 240 }
 241
 242 void wilc_enable_tcp_ack_filter(struct wilc_vif *vif, bool value)
 243 {
 244         vif->ack_filter.enabled = value;
 245 }
 246
 247 static int wilc_wlan_txq_add_cfg_pkt(struct wilc_vif *vif, u8 *buffer,
 248                                      u32 buffer_size)
 249 {
 250         struct txq_entry_t *tqe;
 251         struct wilc *wilc = vif->wilc;
 252
 253         netdev_dbg(vif->ndev, "Adding config packet ...\n");
 254         if (wilc->quit) {
 255                 netdev_dbg(vif->ndev, "Return due to clear function\n");
 256                 complete(&wilc->cfg_event);
 257                 return 0;
 258         }
 259
 260         tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
 261         if (!tqe)
 262                 return 0;
 263
 264         tqe->type = WILC_CFG_PKT;
 265         tqe->buffer = buffer;
 266         tqe->buffer_size = buffer_size;
 267         tqe->tx_complete_func = NULL;
 268         tqe->priv = NULL;
 269         tqe->ack_idx = NOT_TCP_ACK;
 270         tqe->vif = vif;
 271
 272         wilc_wlan_txq_add_to_head(vif, tqe);
 273
 274         return 1;
 275 }
 276
 277 int wilc_wlan_txq_add_net_pkt(struct net_device *dev, void *priv, u8 *buffer,
 278                               u32 buffer_size,
 279                               void (*tx_complete_fn)(void *, int))
 280 {
 281         struct txq_entry_t *tqe;
 282         struct wilc_vif *vif = netdev_priv(dev);
 283         struct wilc *wilc;
 284
 285         wilc = vif->wilc;
 286
 287         if (wilc->quit)
 288                 return 0;
 289
 290         tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
 291
 292         if (!tqe)
 293                 return 0;
 294         tqe->type = WILC_NET_PKT;
 295         tqe->buffer = buffer;
 296         tqe->buffer_size = buffer_size;
 297         tqe->tx_complete_func = tx_complete_fn;
 298         tqe->priv = priv;
 299         tqe->vif = vif;
 300
 301         tqe->ack_idx = NOT_TCP_ACK;
 302         if (vif->ack_filter.enabled)
 303                 tcp_process(dev, tqe);
 304         wilc_wlan_txq_add_to_tail(dev, tqe);
 305         return wilc->txq_entries;
 306 }
 307
 308 int wilc_wlan_txq_add_mgmt_pkt(struct net_device *dev, void *priv, u8 *buffer,
 309                                u32 buffer_size,
 310                                void (*tx_complete_fn)(void *, int))
 311 {
 312         struct txq_entry_t *tqe;
 313         struct wilc_vif *vif = netdev_priv(dev);
 314         struct wilc *wilc;
 315
 316         wilc = vif->wilc;
 317
 318         if (wilc->quit)
 319                 return 0;
 320
 321         tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
 322
 323         if (!tqe)
 324                 return 0;
 325         tqe->type = WILC_MGMT_PKT;
 326         tqe->buffer = buffer;
 327         tqe->buffer_size = buffer_size;
 328         tqe->tx_complete_func = tx_complete_fn;
 329         tqe->priv = priv;
 330         tqe->ack_idx = NOT_TCP_ACK;
 331         tqe->vif = vif;
 332         wilc_wlan_txq_add_to_tail(dev, tqe);
 333         return 1;
 334 }
 335
 336 static struct txq_entry_t *wilc_wlan_txq_get_first(struct wilc *wilc)
 337 {
 338         struct txq_entry_t *tqe = NULL;
 339         unsigned long flags;
 340
 341         spin_lock_irqsave(&wilc->txq_spinlock, flags);
 342
 343         if (!list_empty(&wilc->txq_head.list))
 344                 tqe = list_first_entry(&wilc->txq_head.list, struct txq_entry_t,
 345                                        list);
 346
 347         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
 348
 349         return tqe;
 350 }
 351
 352 static struct txq_entry_t *wilc_wlan_txq_get_next(struct wilc *wilc,
 353                                                   struct txq_entry_t *tqe)
 354 {
 355         unsigned long flags;
 356
 357         spin_lock_irqsave(&wilc->txq_spinlock, flags);
 358
 359         if (!list_is_last(&tqe->list, &wilc->txq_head.list))
 360                 tqe = list_next_entry(tqe, list);
 361         else
 362                 tqe = NULL;
 363         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
 364
 365         return tqe;
 366 }
 367
 368 static void wilc_wlan_rxq_add(struct wilc *wilc, struct rxq_entry_t *rqe)
 369 {
 370         if (wilc->quit)
 371                 return;
 372
 373         mutex_lock(&wilc->rxq_cs);
 374         list_add_tail(&rqe->list, &wilc->rxq_head.list);
 375         mutex_unlock(&wilc->rxq_cs);
 376 }
 377
 378 static struct rxq_entry_t *wilc_wlan_rxq_remove(struct wilc *wilc)
 379 {
 380         struct rxq_entry_t *rqe = NULL;
 381
 382         mutex_lock(&wilc->rxq_cs);
 383         if (!list_empty(&wilc->rxq_head.list)) {
 384                 rqe = list_first_entry(&wilc->rxq_head.list, struct rxq_entry_t,
 385                                        list);
 386                 list_del(&rqe->list);
 387         }
 388         mutex_unlock(&wilc->rxq_cs);
 389         return rqe;
 390 }
 391
 392 void chip_allow_sleep(struct wilc *wilc)
 393 {
 394         u32 reg = 0;
 395
 396         wilc->hif_func->hif_read_reg(wilc, 0xf0, &reg);
 397
 398         wilc->hif_func->hif_write_reg(wilc, 0xf0, reg & ~BIT(0));
 399         wilc->hif_func->hif_write_reg(wilc, 0xfa, 0);
 400 }
 401 EXPORT_SYMBOL_GPL(chip_allow_sleep);
 402
 403 void chip_wakeup(struct wilc *wilc)
 404 {
 405         u32 reg, clk_status_reg;
 406
 407         if ((wilc->io_type & 0x1) == WILC_HIF_SPI) {
 408                 do {
 409                         wilc->hif_func->hif_read_reg(wilc, 1, &reg);
 410                         wilc->hif_func->hif_write_reg(wilc, 1, reg | BIT(1));
 411                         wilc->hif_func->hif_write_reg(wilc, 1, reg & ~BIT(1));
 412
 413                         do {
 414                                 usleep_range(2000, 2500);
 415                                 wilc_get_chipid(wilc, true);
 416                         } while (wilc_get_chipid(wilc, true) == 0);
 417                 } while (wilc_get_chipid(wilc, true) == 0);
 418         } else if ((wilc->io_type & 0x1) == WILC_HIF_SDIO) {
 419                 wilc->hif_func->hif_write_reg(wilc, 0xfa, 1);
 420                 usleep_range(200, 400);
 421                 wilc->hif_func->hif_read_reg(wilc, 0xf0, &reg);
 422                 do {
 423                         wilc->hif_func->hif_write_reg(wilc, 0xf0,
 424                                                       reg | BIT(0));
 425                         wilc->hif_func->hif_read_reg(wilc, 0xf1,
 426                                                      &clk_status_reg);
 427
 428                         while ((clk_status_reg & 0x1) == 0) {
 429                                 usleep_range(2000, 2500);
 430
 431                                 wilc->hif_func->hif_read_reg(wilc, 0xf1,
 432                                                              &clk_status_reg);
 433                         }
 434                         if ((clk_status_reg & 0x1) == 0) {
 435                                 wilc->hif_func->hif_write_reg(wilc, 0xf0,
 436                                                               reg & (~BIT(0)));
 437                         }
 438                 } while ((clk_status_reg & 0x1) == 0);
 439         }
 440
 441         if (wilc->chip_ps_state == WILC_CHIP_SLEEPING_MANUAL) {
 442                 if (wilc_get_chipid(wilc, false) < 0x1002b0) {
 443                         u32 val32;
 444
 445                         wilc->hif_func->hif_read_reg(wilc, 0x1e1c, &val32);
 446                         val32 |= BIT(6);
 447                         wilc->hif_func->hif_write_reg(wilc, 0x1e1c, val32);
 448
 449                         wilc->hif_func->hif_read_reg(wilc, 0x1e9c, &val32);
 450                         val32 |= BIT(6);
 451                         wilc->hif_func->hif_write_reg(wilc, 0x1e9c, val32);
 452                 }
 453         }
 454         wilc->chip_ps_state = WILC_CHIP_WAKEDUP;
 455 }
 456 EXPORT_SYMBOL_GPL(chip_wakeup);
 457
 458 void wilc_chip_sleep_manually(struct wilc *wilc)
 459 {
 460         if (wilc->chip_ps_state != WILC_CHIP_WAKEDUP)
 461                 return;
 462         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 463
 464         chip_allow_sleep(wilc);
 465         wilc->hif_func->hif_write_reg(wilc, 0x10a8, 1);
 466
 467         wilc->chip_ps_state = WILC_CHIP_SLEEPING_MANUAL;
 468         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 469 }
 470 EXPORT_SYMBOL_GPL(wilc_chip_sleep_manually);
 471
 472 void host_wakeup_notify(struct wilc *wilc)
 473 {
 474         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 475         wilc->hif_func->hif_write_reg(wilc, 0x10b0, 1);
 476         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 477 }
 478 EXPORT_SYMBOL_GPL(host_wakeup_notify);
 479
 480 void host_sleep_notify(struct wilc *wilc)
 481 {
 482         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 483         wilc->hif_func->hif_write_reg(wilc, 0x10ac, 1);
 484         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 485 }
 486 EXPORT_SYMBOL_GPL(host_sleep_notify);
 487
 488 int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
 489 {
 490         int i, entries = 0;
 491         u32 sum;
 492         u32 reg;
 493         u32 offset = 0;
 494         int vmm_sz = 0;
 495         struct txq_entry_t *tqe;
 496         int ret = 0;
 497         int counter;
 498         int timeout;
 499         u32 vmm_table[WILC_VMM_TBL_SIZE];
 500         const struct wilc_hif_func *func;
 501         u8 *txb = wilc->tx_buffer;
 502         struct net_device *dev;
 503         struct wilc_vif *vif;
 504
 505         if (wilc->quit)
 506                 goto out;
 507
 508         mutex_lock(&wilc->txq_add_to_head_cs);
 509         tqe = wilc_wlan_txq_get_first(wilc);
 510         if (!tqe)
 511                 goto out;
 512         dev = tqe->vif->ndev;
 513         wilc_wlan_txq_filter_dup_tcp_ack(dev);
 514         i = 0;
 515         sum = 0;
 516         do {
 517                 if (tqe && (i < (WILC_VMM_TBL_SIZE - 1))) {
 518                         if (tqe->type == WILC_CFG_PKT)
 519                                 vmm_sz = ETH_CONFIG_PKT_HDR_OFFSET;
 520
 521                         else if (tqe->type == WILC_NET_PKT)
 522                                 vmm_sz = ETH_ETHERNET_HDR_OFFSET;
 523
 524                         else
 525                                 vmm_sz = HOST_HDR_OFFSET;
 526
 527                         vmm_sz += tqe->buffer_size;
 528
 529                         if (vmm_sz & 0x3)
 530                                 vmm_sz = (vmm_sz + 4) & ~0x3;
 531
 532                         if ((sum + vmm_sz) > WILC_TX_BUFF_SIZE)
 533                                 break;
 534
 535                         vmm_table[i] = vmm_sz / 4;
 536                         if (tqe->type == WILC_CFG_PKT)
 537                                 vmm_table[i] |= BIT(10);
 538                         cpu_to_le32s(&vmm_table[i]);
 539
 540                         i++;
 541                         sum += vmm_sz;
 542                         tqe = wilc_wlan_txq_get_next(wilc, tqe);
 543                 } else {
 544                         break;
 545                 }
 546         } while (1);
 547
 548         if (i == 0)
 549                 goto out;
 550         vmm_table[i] = 0x0;
 551
 552         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 553         counter = 0;
 554         func = wilc->hif_func;
 555         do {
 556                 ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, &reg);
 557                 if (!ret)
 558                         break;
 559
 560                 if ((reg & 0x1) == 0)
 561                         break;
 562
 563                 counter++;
 564                 if (counter > 200) {
 565                         counter = 0;
 566                         ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, 0);
 567                         break;
 568                 }
 569         } while (!wilc->quit);
 570
 571         if (!ret)
 572                 goto out_release_bus;
 573
 574         timeout = 200;
 575         do {
 576                 ret = func->hif_block_tx(wilc,
 577                                          WILC_VMM_TBL_RX_SHADOW_BASE,
 578                                          (u8 *)vmm_table,
 579                                          ((i + 1) * 4));
 580                 if (!ret)
 581                         break;
 582
 583                 ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x2);
 584                 if (!ret)
 585                         break;
 586
 587                 do {
 588                         ret = func->hif_read_reg(wilc, WILC_HOST_VMM_CTL, &reg);
 589                         if (!ret)
 590                                 break;
 591                         if ((reg >> 2) & 0x1) {
 592                                 entries = ((reg >> 3) & 0x3f);
 593                                 break;
 594                         }
 595                         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 596                 } while (--timeout);
 597                 if (timeout <= 0) {
 598                         ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x0);
 599                         break;
 600                 }
 601
 602                 if (!ret)
 603                         break;
 604
 605                 if (entries == 0) {
 606                         ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, &reg);
 607                         if (!ret)
 608                                 break;
 609                         reg &= ~BIT(0);
 610                         ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, reg);
 611                         if (!ret)
 612                                 break;
 613                         break;
 614                 }
 615                 break;
 616         } while (1);
 617
 618         if (!ret)
 619                 goto out_release_bus;
 620
 621         if (entries == 0) {
 622                 ret = -ENOBUFS;
 623                 goto out_release_bus;
 624         }
 625
 626         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 627
 628         offset = 0;
 629         i = 0;
 630         do {
 631                 u32 header, buffer_offset;
 632                 char *bssid;
 633
 634                 tqe = wilc_wlan_txq_remove_from_head(dev);
 635                 if (!tqe)
 636                         break;
 637
 638                 vif = tqe->vif;
 639                 if (vmm_table[i] == 0)
 640                         break;
 641
 642                 le32_to_cpus(&vmm_table[i]);
 643                 vmm_sz = (vmm_table[i] & 0x3ff);
 644                 vmm_sz *= 4;
 645                 header = (tqe->type << 31) |
 646                          (tqe->buffer_size << 15) |
 647                          vmm_sz;
 648                 if (tqe->type == WILC_MGMT_PKT)
 649                         header |= BIT(30);
 650                 else
 651                         header &= ~BIT(30);
 652
 653                 cpu_to_le32s(&header);
 654                 memcpy(&txb[offset], &header, 4);
 655                 if (tqe->type == WILC_CFG_PKT) {
 656                         buffer_offset = ETH_CONFIG_PKT_HDR_OFFSET;
 657                 } else if (tqe->type == WILC_NET_PKT) {
 658                         bssid = tqe->vif->bssid;
 659                         buffer_offset = ETH_ETHERNET_HDR_OFFSET;
 660                         memcpy(&txb[offset + 8], bssid, 6);
 661                 } else {
 662                         buffer_offset = HOST_HDR_OFFSET;
 663                 }
 664
 665                 memcpy(&txb[offset + buffer_offset],
 666                        tqe->buffer, tqe->buffer_size);
 667                 offset += vmm_sz;
 668                 i++;
 669                 tqe->status = 1;
 670                 if (tqe->tx_complete_func)
 671                         tqe->tx_complete_func(tqe->priv, tqe->status);
 672                 if (tqe->ack_idx != NOT_TCP_ACK &&
 673                     tqe->ack_idx < MAX_PENDING_ACKS)
 674                         vif->ack_filter.pending_acks[tqe->ack_idx].txqe = NULL;
 675                 kfree(tqe);
 676         } while (--entries);
 677
 678         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 679
 680         ret = func->hif_clear_int_ext(wilc, ENABLE_TX_VMM);
 681         if (!ret)
 682                 goto out_release_bus;
 683
 684         ret = func->hif_block_tx_ext(wilc, 0, txb, offset);
 685
 686 out_release_bus:
 687         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 688
 689 out:
 690         mutex_unlock(&wilc->txq_add_to_head_cs);
 691
 692         *txq_count = wilc->txq_entries;
 693         return ret;
 694 }
 695
 696 static void wilc_wlan_handle_rx_buff(struct wilc *wilc, u8 *buffer, int size)
 697 {
 698         int offset = 0;
 699         u32 header;
 700         u32 pkt_len, pkt_offset, tp_len;
 701         int is_cfg_packet;
 702         u8 *buff_ptr;
 703
 704         do {
 705                 buff_ptr = buffer + offset;
 706                 memcpy(&header, buff_ptr, 4);
 707                 le32_to_cpus(&header);
 708
 709                 is_cfg_packet = (header >> 31) & 0x1;
 710                 pkt_offset = (header >> 22) & 0x1ff;
 711                 tp_len = (header >> 11) & 0x7ff;
 712                 pkt_len = header & 0x7ff;
 713
 714                 if (pkt_len == 0 || tp_len == 0)
 715                         break;
 716
 717                 if (pkt_offset & IS_MANAGMEMENT) {
 718                         buff_ptr += HOST_HDR_OFFSET;
 719                         wilc_wfi_mgmt_rx(wilc, buff_ptr, pkt_len);
 720                 } else {
 721                         if (!is_cfg_packet) {
 722                                 if (pkt_len > 0) {
 723                                         wilc_frmw_to_host(wilc, buff_ptr,
 724                                                           pkt_len, pkt_offset);
 725                                 }
 726                         } else {
 727                                 struct wilc_cfg_rsp rsp;
 728
 729                                 buff_ptr += pkt_offset;
 730
 731                                 wilc_wlan_cfg_indicate_rx(wilc, buff_ptr,
 732                                                           pkt_len,
 733                                                           &rsp);
 734                                 if (rsp.type == WILC_CFG_RSP) {
 735                                         if (wilc->cfg_seq_no == rsp.seq_no)
 736                                                 complete(&wilc->cfg_event);
 737                                 } else if (rsp.type == WILC_CFG_RSP_STATUS) {
 738                                         wilc_mac_indicate(wilc);
 739                                 }
 740                         }
 741                 }
 742                 offset += tp_len;
 743                 if (offset >= size)
 744                         break;
 745         } while (1);
 746 }
 747
 748 static void wilc_wlan_handle_rxq(struct wilc *wilc)
 749 {
 750         int size;
 751         u8 *buffer;
 752         struct rxq_entry_t *rqe;
 753
 754         do {
 755                 if (wilc->quit) {
 756                         complete(&wilc->cfg_event);
 757                         break;
 758                 }
 759                 rqe = wilc_wlan_rxq_remove(wilc);
 760                 if (!rqe)
 761                         break;
 762
 763                 buffer = rqe->buffer;
 764                 size = rqe->buffer_size;
 765                 wilc_wlan_handle_rx_buff(wilc, buffer, size);
 766
 767                 kfree(rqe);
 768         } while (1);
 769 }
 770
 771 static void wilc_unknown_isr_ext(struct wilc *wilc)
 772 {
 773         wilc->hif_func->hif_clear_int_ext(wilc, 0);
 774 }
 775
 776 static void wilc_pllupdate_isr_ext(struct wilc *wilc, u32 int_stats)
 777 {
 778         int trials = 10;
 779
 780         wilc->hif_func->hif_clear_int_ext(wilc, PLL_INT_CLR);
 781
 782         if (wilc->io_type == WILC_HIF_SDIO)
 783                 mdelay(WILC_PLL_TO_SDIO);
 784         else
 785                 mdelay(WILC_PLL_TO_SPI);
 786
 787         while (!(is_wilc1000(wilc_get_chipid(wilc, true)) && --trials))
 788                 mdelay(1);
 789 }
 790
 791 static void wilc_sleeptimer_isr_ext(struct wilc *wilc, u32 int_stats1)
 792 {
 793         wilc->hif_func->hif_clear_int_ext(wilc, SLEEP_INT_CLR);
 794 }
 795
 796 static void wilc_wlan_handle_isr_ext(struct wilc *wilc, u32 int_status)
 797 {
 798         u32 offset = wilc->rx_buffer_offset;
 799         u8 *buffer = NULL;
 800         u32 size;
 801         u32 retries = 0;
 802         int ret = 0;
 803         struct rxq_entry_t *rqe;
 804
 805         size = (int_status & 0x7fff) << 2;
 806
 807         while (!size && retries < 10) {
 808                 wilc->hif_func->hif_read_size(wilc, &size);
 809                 size = (size & 0x7fff) << 2;
 810                 retries++;
 811         }
 812
 813         if (size <= 0)
 814                 return;
 815
 816         if (WILC_RX_BUFF_SIZE - offset < size)
 817                 offset = 0;
 818
 819         buffer = &wilc->rx_buffer[offset];
 820
 821         wilc->hif_func->hif_clear_int_ext(wilc, DATA_INT_CLR | ENABLE_RX_VMM);
 822         ret = wilc->hif_func->hif_block_rx_ext(wilc, 0, buffer, size);
 823         if (!ret)
 824                 return;
 825
 826         offset += size;
 827         wilc->rx_buffer_offset = offset;
 828         rqe = kmalloc(sizeof(*rqe), GFP_KERNEL);
 829         if (!rqe)
 830                 return;
 831
 832         rqe->buffer = buffer;
 833         rqe->buffer_size = size;
 834         wilc_wlan_rxq_add(wilc, rqe);
 835         wilc_wlan_handle_rxq(wilc);
 836 }
 837
 838 void wilc_handle_isr(struct wilc *wilc)
 839 {
 840         u32 int_status;
 841
 842         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 843         wilc->hif_func->hif_read_int(wilc, &int_status);
 844
 845         if (int_status & PLL_INT_EXT)
 846                 wilc_pllupdate_isr_ext(wilc, int_status);
 847
 848         if (int_status & DATA_INT_EXT)
 849                 wilc_wlan_handle_isr_ext(wilc, int_status);
 850
 851         if (int_status & SLEEP_INT_EXT)
 852                 wilc_sleeptimer_isr_ext(wilc, int_status);
 853
 854         if (!(int_status & (ALL_INT_EXT)))
 855                 wilc_unknown_isr_ext(wilc);
 856
 857         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 858 }
 859 EXPORT_SYMBOL_GPL(wilc_handle_isr);
 860
 861 int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
 862                                 u32 buffer_size)
 863 {
 864         u32 offset;
 865         u32 addr, size, size2, blksz;
 866         u8 *dma_buffer;
 867         int ret = 0;
 868
 869         blksz = BIT(12);
 870
 871         dma_buffer = kmalloc(blksz, GFP_KERNEL);
 872         if (!dma_buffer)
 873                 return -EIO;
 874
 875         offset = 0;
 876         do {
 877                 memcpy(&addr, &buffer[offset], 4);
 878                 memcpy(&size, &buffer[offset + 4], 4);
 879                 le32_to_cpus(&addr);
 880                 le32_to_cpus(&size);
 881                 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 882                 offset += 8;
 883                 while (((int)size) && (offset < buffer_size)) {
 884                         if (size <= blksz)
 885                                 size2 = size;
 886                         else
 887                                 size2 = blksz;
 888
 889                         memcpy(dma_buffer, &buffer[offset], size2);
 890                         ret = wilc->hif_func->hif_block_tx(wilc, addr,
 891                                                            dma_buffer, size2);
 892                         if (!ret)
 893                                 break;
 894
 895                         addr += size2;
 896                         offset += size2;
 897                         size -= size2;
 898                 }
 899                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 900
 901                 if (!ret) {
 902                         ret = -EIO;
 903                         goto fail;
 904                 }
 905         } while (offset < buffer_size);
 906
 907 fail:
 908
 909         kfree(dma_buffer);
 910
 911         return (ret < 0) ? ret : 0;
 912 }
 913
 914 int wilc_wlan_start(struct wilc *wilc)
 915 {
 916         u32 reg = 0;
 917         int ret;
 918         u32 chipid;
 919
 920         if (wilc->io_type == WILC_HIF_SDIO) {
 921                 reg = 0;
 922                 reg |= BIT(3);
 923         } else if (wilc->io_type == WILC_HIF_SPI) {
 924                 reg = 1;
 925         }
 926         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 927         ret = wilc->hif_func->hif_write_reg(wilc, WILC_VMM_CORE_CFG, reg);
 928         if (!ret) {
 929                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 930                 return -EIO;
 931         }
 932         reg = 0;
 933         if (wilc->io_type == WILC_HIF_SDIO && wilc->dev_irq_num)
 934                 reg |= WILC_HAVE_SDIO_IRQ_GPIO;
 935
 936 #ifdef WILC_DISABLE_PMU
 937 #else
 938         reg |= WILC_HAVE_USE_PMU;
 939 #endif
 940
 941 #ifdef WILC_SLEEP_CLK_SRC_XO
 942         reg |= WILC_HAVE_SLEEP_CLK_SRC_XO;
 943 #elif defined WILC_SLEEP_CLK_SRC_RTC
 944         reg |= WILC_HAVE_SLEEP_CLK_SRC_RTC;
 945 #endif
 946
 947 #ifdef WILC_EXT_PA_INV_TX_RX
 948         reg |= WILC_HAVE_EXT_PA_INV_TX_RX;
 949 #endif
 950         reg |= WILC_HAVE_USE_IRQ_AS_HOST_WAKE;
 951         reg |= WILC_HAVE_LEGACY_RF_SETTINGS;
 952 #ifdef XTAL_24
 953         reg |= WILC_HAVE_XTAL_24;
 954 #endif
 955 #ifdef DISABLE_WILC_UART
 956         reg |= WILC_HAVE_DISABLE_WILC_UART;
 957 #endif
 958
 959         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_1, reg);
 960         if (!ret) {
 961                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 962                 return -EIO;
 963         }
 964
 965         wilc->hif_func->hif_sync_ext(wilc, NUM_INT_EXT);
 966
 967         ret = wilc->hif_func->hif_read_reg(wilc, 0x1000, &chipid);
 968         if (!ret) {
 969                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 970                 return -EIO;
 971         }
 972
 973         wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 974         if ((reg & BIT(10)) == BIT(10)) {
 975                 reg &= ~BIT(10);
 976                 wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
 977                 wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 978         }
 979
 980         reg |= BIT(10);
 981         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
 982         wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 983         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 984
 985         return (ret < 0) ? ret : 0;
 986 }
 987
 988 int wilc_wlan_stop(struct wilc *wilc)
 989 {
 990         u32 reg = 0;
 991         int ret;
 992         u8 timeout = 10;
 993
 994         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 995
 996         ret = wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 997         if (!ret) {
 998                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 999                 return ret;
1000         }
1001
1002         reg &= ~BIT(10);
1003         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
1004         if (!ret) {
1005                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1006                 return ret;
1007         }
1008
1009         do {
1010                 ret = wilc->hif_func->hif_read_reg(wilc,
1011                                                    WILC_GLB_RESET_0, &reg);
1012                 if (!ret) {
1013                         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1014                         return ret;
1015                 }
1016
1017                 if ((reg & BIT(10))) {
1018                         reg &= ~BIT(10);
1019                         ret = wilc->hif_func->hif_write_reg(wilc,
1020                                                             WILC_GLB_RESET_0,
1021                                                             reg);
1022                         timeout--;
1023                 } else {
1024                         ret = wilc->hif_func->hif_read_reg(wilc,
1025                                                            WILC_GLB_RESET_0,
1026                                                            &reg);
1027                         if (!ret) {
1028                                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1029                                 return ret;
1030                         }
1031                         break;
1032                 }
1033
1034         } while (timeout);
1035         reg = (BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(8) | BIT(9) | BIT(26) |
1036                BIT(29) | BIT(30) | BIT(31));
1037
1038         wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
1039         reg = (u32)~BIT(10);
1040
1041         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
1042
1043         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1044
1045         return ret;
1046 }
1047
1048 void wilc_wlan_cleanup(struct net_device *dev)
1049 {
1050         struct txq_entry_t *tqe;
1051         struct rxq_entry_t *rqe;
1052         u32 reg = 0;
1053         int ret;
1054         struct wilc_vif *vif = netdev_priv(dev);
1055         struct wilc *wilc = vif->wilc;
1056
1057         wilc->quit = 1;
1058         do {
1059                 tqe = wilc_wlan_txq_remove_from_head(dev);
1060                 if (!tqe)
1061                         break;
1062                 if (tqe->tx_complete_func)
1063                         tqe->tx_complete_func(tqe->priv, 0);
1064                 kfree(tqe);
1065         } while (1);
1066
1067         do {
1068                 rqe = wilc_wlan_rxq_remove(wilc);
1069                 if (!rqe)
1070                         break;
1071                 kfree(rqe);
1072         } while (1);
1073
1074         kfree(wilc->rx_buffer);
1075         wilc->rx_buffer = NULL;
1076         kfree(wilc->tx_buffer);
1077         wilc->tx_buffer = NULL;
1078
1079         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
1080
1081         ret = wilc->hif_func->hif_read_reg(wilc, WILC_GP_REG_0, &reg);
1082         if (!ret) {
1083                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1084                 return;
1085         }
1086
1087         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_0,
1088                                         (reg | ABORT_INT));
1089         if (!ret) {
1090                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1091                 return;
1092         }
1093
1094         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1095         wilc->hif_func->hif_deinit(NULL);
1096 }
1097
1098 static int wilc_wlan_cfg_commit(struct wilc_vif *vif, int type,
1099                                 u32 drv_handler)
1100 {
1101         struct wilc *wilc = vif->wilc;
1102         struct wilc_cfg_frame *cfg = &wilc->cfg_frame;
1103         int t_len = wilc->cfg_frame_offset + sizeof(struct wilc_cfg_cmd_hdr);
1104
1105         if (type == WILC_CFG_SET)
1106                 cfg->hdr.cmd_type = 'W';
1107         else
1108                 cfg->hdr.cmd_type = 'Q';
1109
1110         cfg->hdr.seq_no = wilc->cfg_seq_no % 256;
1111         cfg->hdr.total_len = cpu_to_le16(t_len);
1112         cfg->hdr.driver_handler = cpu_to_le32(drv_handler);
1113         wilc->cfg_seq_no = cfg->hdr.seq_no;
1114
1115         if (!wilc_wlan_txq_add_cfg_pkt(vif, (u8 *)&cfg->hdr, t_len))
1116                 return -1;
1117
1118         return 0;
1119 }
1120
1121 int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
1122                       u32 buffer_size, int commit, u32 drv_handler)
1123 {
1124         u32 offset;
1125         int ret_size;
1126         struct wilc *wilc = vif->wilc;
1127
1128         mutex_lock(&wilc->cfg_cmd_lock);
1129
1130         if (start)
1131                 wilc->cfg_frame_offset = 0;
1132
1133         offset = wilc->cfg_frame_offset;
1134         ret_size = wilc_wlan_cfg_set_wid(wilc->cfg_frame.frame, offset,
1135                                          wid, buffer, buffer_size);
1136         offset += ret_size;
1137         wilc->cfg_frame_offset = offset;
1138
1139         if (!commit) {
1140                 mutex_unlock(&wilc->cfg_cmd_lock);
1141                 return ret_size;
1142         }
1143
1144         netdev_dbg(vif->ndev, "%s: seqno[%d]\n", __func__, wilc->cfg_seq_no);
1145
1146         if (wilc_wlan_cfg_commit(vif, WILC_CFG_SET, drv_handler))
1147                 ret_size = 0;
1148
1149         if (!wait_for_completion_timeout(&wilc->cfg_event,
1150                                          WILC_CFG_PKTS_TIMEOUT)) {
1151                 netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1152                 ret_size = 0;
1153         }
1154
1155         wilc->cfg_frame_offset = 0;
1156         wilc->cfg_seq_no += 1;
1157         mutex_unlock(&wilc->cfg_cmd_lock);
1158
1159         return ret_size;
1160 }
1161
1162 int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
1163                       u32 drv_handler)
1164 {
1165         u32 offset;
1166         int ret_size;
1167         struct wilc *wilc = vif->wilc;
1168
1169         mutex_lock(&wilc->cfg_cmd_lock);
1170
1171         if (start)
1172                 wilc->cfg_frame_offset = 0;
1173
1174         offset = wilc->cfg_frame_offset;
1175         ret_size = wilc_wlan_cfg_get_wid(wilc->cfg_frame.frame, offset, wid);
1176         offset += ret_size;
1177         wilc->cfg_frame_offset = offset;
1178
1179         if (!commit) {
1180                 mutex_unlock(&wilc->cfg_cmd_lock);
1181                 return ret_size;
1182         }
1183
1184         if (wilc_wlan_cfg_commit(vif, WILC_CFG_QUERY, drv_handler))
1185                 ret_size = 0;
1186
1187         if (!wait_for_completion_timeout(&wilc->cfg_event,
1188                                          WILC_CFG_PKTS_TIMEOUT)) {
1189                 netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1190                 ret_size = 0;
1191         }
1192         wilc->cfg_frame_offset = 0;
1193         wilc->cfg_seq_no += 1;
1194         mutex_unlock(&wilc->cfg_cmd_lock);
1195
1196         return ret_size;
1197 }
1198
1199 int wilc_wlan_cfg_get_val(struct wilc *wl, u16 wid, u8 *buffer, u32 buffer_size)
1200 {
1201         return wilc_wlan_cfg_get_wid_value(wl, wid, buffer, buffer_size);
1202 }
1203
1204 int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
1205                          u32 count)
1206 {
1207         int i;
1208         int ret = 0;
1209         u32 drv = wilc_get_vif_idx(vif);
1210
1211         if (mode == WILC_GET_CFG) {
1212                 for (i = 0; i < count; i++) {
1213                         if (!wilc_wlan_cfg_get(vif, !i,
1214                                                wids[i].id,
1215                                                (i == count - 1),
1216                                                drv)) {
1217                                 ret = -ETIMEDOUT;
1218                                 break;
1219                         }
1220                 }
1221                 for (i = 0; i < count; i++) {
1222                         wids[i].size = wilc_wlan_cfg_get_val(vif->wilc,
1223                                                              wids[i].id,
1224                                                              wids[i].val,
1225                                                              wids[i].size);
1226                 }
1227         } else if (mode == WILC_SET_CFG) {
1228                 for (i = 0; i < count; i++) {
1229                         if (!wilc_wlan_cfg_set(vif, !i,
1230                                                wids[i].id,
1231                                                wids[i].val,
1232                                                wids[i].size,
1233                                                (i == count - 1),
1234                                                drv)) {
1235                                 ret = -ETIMEDOUT;
1236                                 break;
1237                         }
1238                 }
1239         }
1240
1241         return ret;
1242 }
1243
1244 static u32 init_chip(struct net_device *dev)
1245 {
1246         u32 chipid;
1247         u32 reg, ret = 0;
1248         struct wilc_vif *vif = netdev_priv(dev);
1249         struct wilc *wilc = vif->wilc;
1250
1251         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
1252
1253         chipid = wilc_get_chipid(wilc, true);
1254
1255         if ((chipid & 0xfff) != 0xa0) {
1256                 ret = wilc->hif_func->hif_read_reg(wilc, 0x1118, &reg);
1257                 if (!ret) {
1258                         netdev_err(dev, "fail read reg 0x1118\n");
1259                         goto release;
1260                 }
1261                 reg |= BIT(0);
1262                 ret = wilc->hif_func->hif_write_reg(wilc, 0x1118, reg);
1263                 if (!ret) {
1264                         netdev_err(dev, "fail write reg 0x1118\n");
1265                         goto release;
1266                 }
1267                 ret = wilc->hif_func->hif_write_reg(wilc, 0xc0000, 0x71);
1268                 if (!ret) {
1269                         netdev_err(dev, "fail write reg 0xc0000\n");
1270                         goto release;
1271                 }
1272         }
1273
1274 release:
1275         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
1276
1277         return ret;
1278 }
1279
1280 u32 wilc_get_chipid(struct wilc *wilc, bool update)
1281 {
1282         static u32 chipid;
1283         u32 tempchipid = 0;
1284         u32 rfrevid = 0;
1285
1286         if (chipid == 0 || update) {
1287                 wilc->hif_func->hif_read_reg(wilc, 0x1000, &tempchipid);
1288                 wilc->hif_func->hif_read_reg(wilc, 0x13f4, &rfrevid);
1289                 if (!is_wilc1000(tempchipid)) {
1290                         chipid = 0;
1291                         return chipid;
1292                 }
1293                 if (tempchipid == 0x1002a0) {
1294                         if (rfrevid != 0x1)
1295                                 tempchipid = 0x1002a1;
1296                 } else if (tempchipid == 0x1002b0) {
1297                         if (rfrevid == 0x4)
1298                                 tempchipid = 0x1002b1;
1299                         else if (rfrevid != 0x3)
1300                                 tempchipid = 0x1002b2;
1301                 }
1302
1303                 chipid = tempchipid;
1304         }
1305         return chipid;
1306 }
1307
1308 int wilc_wlan_init(struct net_device *dev)
1309 {
1310         int ret = 0;
1311         struct wilc_vif *vif = netdev_priv(dev);
1312         struct wilc *wilc;
1313
1314         wilc = vif->wilc;
1315
1316         wilc->quit = 0;
1317
1318         if (!wilc->hif_func->hif_init(wilc, false)) {
1319                 ret = -EIO;
1320                 goto fail;
1321         }
1322
1323         if (!wilc->tx_buffer)
1324                 wilc->tx_buffer = kmalloc(WILC_TX_BUFF_SIZE, GFP_KERNEL);
1325
1326         if (!wilc->tx_buffer) {
1327                 ret = -ENOBUFS;
1328                 goto fail;
1329         }
1330
1331         if (!wilc->rx_buffer)
1332                 wilc->rx_buffer = kmalloc(WILC_RX_BUFF_SIZE, GFP_KERNEL);
1333
1334         if (!wilc->rx_buffer) {
1335                 ret = -ENOBUFS;
1336                 goto fail;
1337         }
1338
1339         if (!init_chip(dev)) {
1340                 ret = -EIO;
1341                 goto fail;
1342         }
1343
1344         return 1;
1345
1346 fail:
1347
1348         kfree(wilc->rx_buffer);
1349         wilc->rx_buffer = NULL;
1350         kfree(wilc->tx_buffer);
1351         wilc->tx_buffer = NULL;
1352
1353         return ret;
1354 }