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