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, wilc_tx_complete_func_t func)
 278 {
 279         struct txq_entry_t *tqe;
 280         struct wilc_vif *vif = netdev_priv(dev);
 281         struct wilc *wilc;
 282
 283         wilc = vif->wilc;
 284
 285         if (wilc->quit)
 286                 return 0;
 287
 288         tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
 289
 290         if (!tqe)
 291                 return 0;
 292         tqe->type = WILC_NET_PKT;
 293         tqe->buffer = buffer;
 294         tqe->buffer_size = buffer_size;
 295         tqe->tx_complete_func = func;
 296         tqe->priv = priv;
 297
 298         tqe->ack_idx = NOT_TCP_ACK;
 299         if (vif->ack_filter.enabled)
 300                 tcp_process(dev, tqe);
 301         wilc_wlan_txq_add_to_tail(dev, tqe);
 302         return wilc->txq_entries;
 303 }
 304
 305 int wilc_wlan_txq_add_mgmt_pkt(struct net_device *dev, void *priv, u8 *buffer,
 306                                u32 buffer_size, wilc_tx_complete_func_t func)
 307 {
 308         struct txq_entry_t *tqe;
 309         struct wilc_vif *vif = netdev_priv(dev);
 310         struct wilc *wilc;
 311
 312         wilc = vif->wilc;
 313
 314         if (wilc->quit)
 315                 return 0;
 316
 317         tqe = kmalloc(sizeof(*tqe), GFP_KERNEL);
 318
 319         if (!tqe)
 320                 return 0;
 321         tqe->type = WILC_MGMT_PKT;
 322         tqe->buffer = buffer;
 323         tqe->buffer_size = buffer_size;
 324         tqe->tx_complete_func = func;
 325         tqe->priv = priv;
 326         tqe->ack_idx = NOT_TCP_ACK;
 327         wilc_wlan_txq_add_to_tail(dev, tqe);
 328         return 1;
 329 }
 330
 331 static struct txq_entry_t *wilc_wlan_txq_get_first(struct wilc *wilc)
 332 {
 333         struct txq_entry_t *tqe = NULL;
 334         unsigned long flags;
 335
 336         spin_lock_irqsave(&wilc->txq_spinlock, flags);
 337
 338         if (!list_empty(&wilc->txq_head.list))
 339                 tqe = list_first_entry(&wilc->txq_head.list, struct txq_entry_t,
 340                                        list);
 341
 342         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
 343
 344         return tqe;
 345 }
 346
 347 static struct txq_entry_t *wilc_wlan_txq_get_next(struct wilc *wilc,
 348                                                   struct txq_entry_t *tqe)
 349 {
 350         unsigned long flags;
 351
 352         spin_lock_irqsave(&wilc->txq_spinlock, flags);
 353
 354         if (!list_is_last(&tqe->list, &wilc->txq_head.list))
 355                 tqe = list_next_entry(tqe, list);
 356         else
 357                 tqe = NULL;
 358         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
 359
 360         return tqe;
 361 }
 362
 363 static void wilc_wlan_rxq_add(struct wilc *wilc, struct rxq_entry_t *rqe)
 364 {
 365         if (wilc->quit)
 366                 return;
 367
 368         mutex_lock(&wilc->rxq_cs);
 369         list_add_tail(&rqe->list, &wilc->rxq_head.list);
 370         mutex_unlock(&wilc->rxq_cs);
 371 }
 372
 373 static struct rxq_entry_t *wilc_wlan_rxq_remove(struct wilc *wilc)
 374 {
 375         struct rxq_entry_t *rqe = NULL;
 376
 377         mutex_lock(&wilc->rxq_cs);
 378         if (!list_empty(&wilc->rxq_head.list)) {
 379                 rqe = list_first_entry(&wilc->rxq_head.list, struct rxq_entry_t,
 380                                        list);
 381                 list_del(&rqe->list);
 382         }
 383         mutex_unlock(&wilc->rxq_cs);
 384         return rqe;
 385 }
 386
 387 void chip_allow_sleep(struct wilc *wilc)
 388 {
 389         u32 reg = 0;
 390
 391         wilc->hif_func->hif_read_reg(wilc, 0xf0, &reg);
 392
 393         wilc->hif_func->hif_write_reg(wilc, 0xf0, reg & ~BIT(0));
 394         wilc->hif_func->hif_write_reg(wilc, 0xfa, 0);
 395 }
 396 EXPORT_SYMBOL_GPL(chip_allow_sleep);
 397
 398 void chip_wakeup(struct wilc *wilc)
 399 {
 400         u32 reg, clk_status_reg;
 401
 402         if ((wilc->io_type & 0x1) == WILC_HIF_SPI) {
 403                 do {
 404                         wilc->hif_func->hif_read_reg(wilc, 1, &reg);
 405                         wilc->hif_func->hif_write_reg(wilc, 1, reg | BIT(1));
 406                         wilc->hif_func->hif_write_reg(wilc, 1, reg & ~BIT(1));
 407
 408                         do {
 409                                 usleep_range(2 * 1000, 2 * 1000);
 410                                 wilc_get_chipid(wilc, true);
 411                         } while (wilc_get_chipid(wilc, true) == 0);
 412                 } while (wilc_get_chipid(wilc, true) == 0);
 413         } else if ((wilc->io_type & 0x1) == WILC_HIF_SDIO) {
 414                 wilc->hif_func->hif_write_reg(wilc, 0xfa, 1);
 415                 usleep_range(200, 400);
 416                 wilc->hif_func->hif_read_reg(wilc, 0xf0, &reg);
 417                 do {
 418                         wilc->hif_func->hif_write_reg(wilc, 0xf0,
 419                                                       reg | BIT(0));
 420                         wilc->hif_func->hif_read_reg(wilc, 0xf1,
 421                                                      &clk_status_reg);
 422
 423                         while ((clk_status_reg & 0x1) == 0) {
 424                                 usleep_range(2 * 1000, 2 * 1000);
 425
 426                                 wilc->hif_func->hif_read_reg(wilc, 0xf1,
 427                                                              &clk_status_reg);
 428                         }
 429                         if ((clk_status_reg & 0x1) == 0) {
 430                                 wilc->hif_func->hif_write_reg(wilc, 0xf0,
 431                                                               reg & (~BIT(0)));
 432                         }
 433                 } while ((clk_status_reg & 0x1) == 0);
 434         }
 435
 436         if (wilc->chip_ps_state == WILC_CHIP_SLEEPING_MANUAL) {
 437                 if (wilc_get_chipid(wilc, false) < 0x1002b0) {
 438                         u32 val32;
 439
 440                         wilc->hif_func->hif_read_reg(wilc, 0x1e1c, &val32);
 441                         val32 |= BIT(6);
 442                         wilc->hif_func->hif_write_reg(wilc, 0x1e1c, val32);
 443
 444                         wilc->hif_func->hif_read_reg(wilc, 0x1e9c, &val32);
 445                         val32 |= BIT(6);
 446                         wilc->hif_func->hif_write_reg(wilc, 0x1e9c, val32);
 447                 }
 448         }
 449         wilc->chip_ps_state = WILC_CHIP_WAKEDUP;
 450 }
 451 EXPORT_SYMBOL_GPL(chip_wakeup);
 452
 453 void wilc_chip_sleep_manually(struct wilc *wilc)
 454 {
 455         if (wilc->chip_ps_state != WILC_CHIP_WAKEDUP)
 456                 return;
 457         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 458
 459         chip_allow_sleep(wilc);
 460         wilc->hif_func->hif_write_reg(wilc, 0x10a8, 1);
 461
 462         wilc->chip_ps_state = WILC_CHIP_SLEEPING_MANUAL;
 463         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 464 }
 465 EXPORT_SYMBOL_GPL(wilc_chip_sleep_manually);
 466
 467 void host_wakeup_notify(struct wilc *wilc)
 468 {
 469         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 470         wilc->hif_func->hif_write_reg(wilc, 0x10b0, 1);
 471         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 472 }
 473 EXPORT_SYMBOL_GPL(host_wakeup_notify);
 474
 475 void host_sleep_notify(struct wilc *wilc)
 476 {
 477         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 478         wilc->hif_func->hif_write_reg(wilc, 0x10ac, 1);
 479         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 480 }
 481 EXPORT_SYMBOL_GPL(host_sleep_notify);
 482
 483 int wilc_wlan_handle_txq(struct net_device *dev, u32 *txq_count)
 484 {
 485         int i, entries = 0;
 486         u32 sum;
 487         u32 reg;
 488         u32 offset = 0;
 489         int vmm_sz = 0;
 490         struct txq_entry_t *tqe;
 491         int ret = 0;
 492         int counter;
 493         int timeout;
 494         u32 vmm_table[WILC_VMM_TBL_SIZE];
 495         struct wilc_vif *vif = netdev_priv(dev);
 496         struct wilc *wilc = vif->wilc;
 497         const struct wilc_hif_func *func;
 498         u8 *txb = wilc->tx_buffer;
 499
 500         if (wilc->quit)
 501                 goto out;
 502
 503         mutex_lock(&wilc->txq_add_to_head_cs);
 504         wilc_wlan_txq_filter_dup_tcp_ack(dev);
 505         tqe = wilc_wlan_txq_get_first(wilc);
 506         i = 0;
 507         sum = 0;
 508         do {
 509                 if (tqe && (i < (WILC_VMM_TBL_SIZE - 1))) {
 510                         if (tqe->type == WILC_CFG_PKT)
 511                                 vmm_sz = ETH_CONFIG_PKT_HDR_OFFSET;
 512
 513                         else if (tqe->type == WILC_NET_PKT)
 514                                 vmm_sz = ETH_ETHERNET_HDR_OFFSET;
 515
 516                         else
 517                                 vmm_sz = HOST_HDR_OFFSET;
 518
 519                         vmm_sz += tqe->buffer_size;
 520
 521                         if (vmm_sz & 0x3)
 522                                 vmm_sz = (vmm_sz + 4) & ~0x3;
 523
 524                         if ((sum + vmm_sz) > LINUX_TX_SIZE)
 525                                 break;
 526
 527                         vmm_table[i] = vmm_sz / 4;
 528                         if (tqe->type == WILC_CFG_PKT)
 529                                 vmm_table[i] |= BIT(10);
 530                         cpu_to_le32s(&vmm_table[i]);
 531
 532                         i++;
 533                         sum += vmm_sz;
 534                         tqe = wilc_wlan_txq_get_next(wilc, tqe);
 535                 } else {
 536                         break;
 537                 }
 538         } while (1);
 539
 540         if (i == 0)
 541                 goto out;
 542         vmm_table[i] = 0x0;
 543
 544         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 545         counter = 0;
 546         func = wilc->hif_func;
 547         do {
 548                 ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, &reg);
 549                 if (!ret)
 550                         break;
 551
 552                 if ((reg & 0x1) == 0)
 553                         break;
 554
 555                 counter++;
 556                 if (counter > 200) {
 557                         counter = 0;
 558                         ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, 0);
 559                         break;
 560                 }
 561         } while (!wilc->quit);
 562
 563         if (!ret)
 564                 goto out_release_bus;
 565
 566         timeout = 200;
 567         do {
 568                 ret = func->hif_block_tx(wilc,
 569                                          WILC_VMM_TBL_RX_SHADOW_BASE,
 570                                          (u8 *)vmm_table,
 571                                          ((i + 1) * 4));
 572                 if (!ret)
 573                         break;
 574
 575                 ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x2);
 576                 if (!ret)
 577                         break;
 578
 579                 do {
 580                         ret = func->hif_read_reg(wilc, WILC_HOST_VMM_CTL, &reg);
 581                         if (!ret)
 582                                 break;
 583                         if ((reg >> 2) & 0x1) {
 584                                 entries = ((reg >> 3) & 0x3f);
 585                                 break;
 586                         }
 587                         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 588                 } while (--timeout);
 589                 if (timeout <= 0) {
 590                         ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x0);
 591                         break;
 592                 }
 593
 594                 if (!ret)
 595                         break;
 596
 597                 if (entries == 0) {
 598                         ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, &reg);
 599                         if (!ret)
 600                                 break;
 601                         reg &= ~BIT(0);
 602                         ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, reg);
 603                         if (!ret)
 604                                 break;
 605                         break;
 606                 }
 607                 break;
 608         } while (1);
 609
 610         if (!ret)
 611                 goto out_release_bus;
 612
 613         if (entries == 0) {
 614                 ret = -ENOBUFS;
 615                 goto out_release_bus;
 616         }
 617
 618         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 619
 620         offset = 0;
 621         i = 0;
 622         do {
 623                 u32 header, buffer_offset;
 624                 char *bssid;
 625
 626                 tqe = wilc_wlan_txq_remove_from_head(dev);
 627                 if (!tqe)
 628                         break;
 629
 630                 if (vmm_table[i] == 0)
 631                         break;
 632
 633                 le32_to_cpus(&vmm_table[i]);
 634                 vmm_sz = (vmm_table[i] & 0x3ff);
 635                 vmm_sz *= 4;
 636                 header = (tqe->type << 31) |
 637                          (tqe->buffer_size << 15) |
 638                          vmm_sz;
 639                 if (tqe->type == WILC_MGMT_PKT)
 640                         header |= BIT(30);
 641                 else
 642                         header &= ~BIT(30);
 643
 644                 cpu_to_le32s(&header);
 645                 memcpy(&txb[offset], &header, 4);
 646                 if (tqe->type == WILC_CFG_PKT) {
 647                         buffer_offset = ETH_CONFIG_PKT_HDR_OFFSET;
 648                 } else if (tqe->type == WILC_NET_PKT) {
 649                         bssid = ((struct tx_complete_data *)(tqe->priv))->bssid;
 650
 651                         buffer_offset = ETH_ETHERNET_HDR_OFFSET;
 652                         memcpy(&txb[offset + 8], bssid, 6);
 653                 } else {
 654                         buffer_offset = HOST_HDR_OFFSET;
 655                 }
 656
 657                 memcpy(&txb[offset + buffer_offset],
 658                        tqe->buffer, tqe->buffer_size);
 659                 offset += vmm_sz;
 660                 i++;
 661                 tqe->status = 1;
 662                 if (tqe->tx_complete_func)
 663                         tqe->tx_complete_func(tqe->priv, tqe->status);
 664                 if (tqe->ack_idx != NOT_TCP_ACK &&
 665                     tqe->ack_idx < MAX_PENDING_ACKS)
 666                         vif->ack_filter.pending_acks[tqe->ack_idx].txqe = NULL;
 667                 kfree(tqe);
 668         } while (--entries);
 669
 670         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 671
 672         ret = func->hif_clear_int_ext(wilc, ENABLE_TX_VMM);
 673         if (!ret)
 674                 goto out_release_bus;
 675
 676         ret = func->hif_block_tx_ext(wilc, 0, txb, offset);
 677
 678 out_release_bus:
 679         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 680
 681 out:
 682         mutex_unlock(&wilc->txq_add_to_head_cs);
 683
 684         *txq_count = wilc->txq_entries;
 685         return ret;
 686 }
 687
 688 static void wilc_wlan_handle_rx_buff(struct wilc *wilc, u8 *buffer, int size)
 689 {
 690         int offset = 0;
 691         u32 header;
 692         u32 pkt_len, pkt_offset, tp_len;
 693         int is_cfg_packet;
 694         u8 *buff_ptr;
 695
 696         do {
 697                 buff_ptr = buffer + offset;
 698                 memcpy(&header, buff_ptr, 4);
 699                 le32_to_cpus(&header);
 700
 701                 is_cfg_packet = (header >> 31) & 0x1;
 702                 pkt_offset = (header >> 22) & 0x1ff;
 703                 tp_len = (header >> 11) & 0x7ff;
 704                 pkt_len = header & 0x7ff;
 705
 706                 if (pkt_len == 0 || tp_len == 0)
 707                         break;
 708
 709                 if (pkt_offset & IS_MANAGMEMENT) {
 710                         pkt_offset &= ~(IS_MANAGMEMENT |
 711                                         IS_MANAGMEMENT_CALLBACK |
 712                                         IS_MGMT_STATUS_SUCCES);
 713                         buff_ptr += HOST_HDR_OFFSET;
 714                         wilc_wfi_mgmt_rx(wilc, buff_ptr, pkt_len);
 715                 } else {
 716                         if (!is_cfg_packet) {
 717                                 if (pkt_len > 0) {
 718                                         wilc_frmw_to_linux(wilc, buff_ptr,
 719                                                            pkt_len,
 720                                                            pkt_offset);
 721                                 }
 722                         } else {
 723                                 struct wilc_cfg_rsp rsp;
 724
 725                                 buff_ptr += pkt_offset;
 726
 727                                 wilc_wlan_cfg_indicate_rx(wilc, buff_ptr,
 728                                                           pkt_len,
 729                                                           &rsp);
 730                                 if (rsp.type == WILC_CFG_RSP) {
 731                                         if (wilc->cfg_seq_no == rsp.seq_no)
 732                                                 complete(&wilc->cfg_event);
 733                                 } else if (rsp.type == WILC_CFG_RSP_STATUS) {
 734                                         wilc_mac_indicate(wilc);
 735                                 }
 736                         }
 737                 }
 738                 offset += tp_len;
 739                 if (offset >= size)
 740                         break;
 741         } while (1);
 742 }
 743
 744 static void wilc_wlan_handle_rxq(struct wilc *wilc)
 745 {
 746         int size;
 747         u8 *buffer;
 748         struct rxq_entry_t *rqe;
 749
 750         do {
 751                 if (wilc->quit) {
 752                         complete(&wilc->cfg_event);
 753                         break;
 754                 }
 755                 rqe = wilc_wlan_rxq_remove(wilc);
 756                 if (!rqe)
 757                         break;
 758
 759                 buffer = rqe->buffer;
 760                 size = rqe->buffer_size;
 761                 wilc_wlan_handle_rx_buff(wilc, buffer, size);
 762
 763                 kfree(rqe);
 764         } while (1);
 765 }
 766
 767 static void wilc_unknown_isr_ext(struct wilc *wilc)
 768 {
 769         wilc->hif_func->hif_clear_int_ext(wilc, 0);
 770 }
 771
 772 static void wilc_pllupdate_isr_ext(struct wilc *wilc, u32 int_stats)
 773 {
 774         int trials = 10;
 775
 776         wilc->hif_func->hif_clear_int_ext(wilc, PLL_INT_CLR);
 777
 778         if (wilc->io_type == WILC_HIF_SDIO)
 779                 mdelay(WILC_PLL_TO_SDIO);
 780         else
 781                 mdelay(WILC_PLL_TO_SPI);
 782
 783         while (!(is_wilc1000(wilc_get_chipid(wilc, true)) && --trials))
 784                 mdelay(1);
 785 }
 786
 787 static void wilc_sleeptimer_isr_ext(struct wilc *wilc, u32 int_stats1)
 788 {
 789         wilc->hif_func->hif_clear_int_ext(wilc, SLEEP_INT_CLR);
 790 }
 791
 792 static void wilc_wlan_handle_isr_ext(struct wilc *wilc, u32 int_status)
 793 {
 794         u32 offset = wilc->rx_buffer_offset;
 795         u8 *buffer = NULL;
 796         u32 size;
 797         u32 retries = 0;
 798         int ret = 0;
 799         struct rxq_entry_t *rqe;
 800
 801         size = (int_status & 0x7fff) << 2;
 802
 803         while (!size && retries < 10) {
 804                 wilc->hif_func->hif_read_size(wilc, &size);
 805                 size = (size & 0x7fff) << 2;
 806                 retries++;
 807         }
 808
 809         if (size <= 0)
 810                 return;
 811
 812         if (LINUX_RX_SIZE - offset < size)
 813                 offset = 0;
 814
 815         buffer = &wilc->rx_buffer[offset];
 816
 817         wilc->hif_func->hif_clear_int_ext(wilc, DATA_INT_CLR | ENABLE_RX_VMM);
 818         ret = wilc->hif_func->hif_block_rx_ext(wilc, 0, buffer, size);
 819         if (!ret)
 820                 return;
 821
 822         offset += size;
 823         wilc->rx_buffer_offset = offset;
 824         rqe = kmalloc(sizeof(*rqe), GFP_KERNEL);
 825         if (!rqe)
 826                 return;
 827
 828         rqe->buffer = buffer;
 829         rqe->buffer_size = size;
 830         wilc_wlan_rxq_add(wilc, rqe);
 831         wilc_wlan_handle_rxq(wilc);
 832 }
 833
 834 void wilc_handle_isr(struct wilc *wilc)
 835 {
 836         u32 int_status;
 837
 838         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 839         wilc->hif_func->hif_read_int(wilc, &int_status);
 840
 841         if (int_status & PLL_INT_EXT)
 842                 wilc_pllupdate_isr_ext(wilc, int_status);
 843
 844         if (int_status & DATA_INT_EXT)
 845                 wilc_wlan_handle_isr_ext(wilc, int_status);
 846
 847         if (int_status & SLEEP_INT_EXT)
 848                 wilc_sleeptimer_isr_ext(wilc, int_status);
 849
 850         if (!(int_status & (ALL_INT_EXT)))
 851                 wilc_unknown_isr_ext(wilc);
 852
 853         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 854 }
 855 EXPORT_SYMBOL_GPL(wilc_handle_isr);
 856
 857 int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
 858                                 u32 buffer_size)
 859 {
 860         u32 offset;
 861         u32 addr, size, size2, blksz;
 862         u8 *dma_buffer;
 863         int ret = 0;
 864
 865         blksz = BIT(12);
 866
 867         dma_buffer = kmalloc(blksz, GFP_KERNEL);
 868         if (!dma_buffer)
 869                 return -EIO;
 870
 871         offset = 0;
 872         do {
 873                 memcpy(&addr, &buffer[offset], 4);
 874                 memcpy(&size, &buffer[offset + 4], 4);
 875                 le32_to_cpus(&addr);
 876                 le32_to_cpus(&size);
 877                 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 878                 offset += 8;
 879                 while (((int)size) && (offset < buffer_size)) {
 880                         if (size <= blksz)
 881                                 size2 = size;
 882                         else
 883                                 size2 = blksz;
 884
 885                         memcpy(dma_buffer, &buffer[offset], size2);
 886                         ret = wilc->hif_func->hif_block_tx(wilc, addr,
 887                                                            dma_buffer, size2);
 888                         if (!ret)
 889                                 break;
 890
 891                         addr += size2;
 892                         offset += size2;
 893                         size -= size2;
 894                 }
 895                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 896
 897                 if (!ret) {
 898                         ret = -EIO;
 899                         goto fail;
 900                 }
 901         } while (offset < buffer_size);
 902
 903 fail:
 904
 905         kfree(dma_buffer);
 906
 907         return (ret < 0) ? ret : 0;
 908 }
 909
 910 int wilc_wlan_start(struct wilc *wilc)
 911 {
 912         u32 reg = 0;
 913         int ret;
 914         u32 chipid;
 915
 916         if (wilc->io_type == WILC_HIF_SDIO) {
 917                 reg = 0;
 918                 reg |= BIT(3);
 919         } else if (wilc->io_type == WILC_HIF_SPI) {
 920                 reg = 1;
 921         }
 922         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 923         ret = wilc->hif_func->hif_write_reg(wilc, WILC_VMM_CORE_CFG, reg);
 924         if (!ret) {
 925                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 926                 return -EIO;
 927         }
 928         reg = 0;
 929         if (wilc->io_type == WILC_HIF_SDIO && wilc->dev_irq_num)
 930                 reg |= WILC_HAVE_SDIO_IRQ_GPIO;
 931
 932 #ifdef WILC_DISABLE_PMU
 933 #else
 934         reg |= WILC_HAVE_USE_PMU;
 935 #endif
 936
 937 #ifdef WILC_SLEEP_CLK_SRC_XO
 938         reg |= WILC_HAVE_SLEEP_CLK_SRC_XO;
 939 #elif defined WILC_SLEEP_CLK_SRC_RTC
 940         reg |= WILC_HAVE_SLEEP_CLK_SRC_RTC;
 941 #endif
 942
 943 #ifdef WILC_EXT_PA_INV_TX_RX
 944         reg |= WILC_HAVE_EXT_PA_INV_TX_RX;
 945 #endif
 946         reg |= WILC_HAVE_USE_IRQ_AS_HOST_WAKE;
 947         reg |= WILC_HAVE_LEGACY_RF_SETTINGS;
 948 #ifdef XTAL_24
 949         reg |= WILC_HAVE_XTAL_24;
 950 #endif
 951 #ifdef DISABLE_WILC_UART
 952         reg |= WILC_HAVE_DISABLE_WILC_UART;
 953 #endif
 954
 955         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_1, reg);
 956         if (!ret) {
 957                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 958                 return -EIO;
 959         }
 960
 961         wilc->hif_func->hif_sync_ext(wilc, NUM_INT_EXT);
 962
 963         ret = wilc->hif_func->hif_read_reg(wilc, 0x1000, &chipid);
 964         if (!ret) {
 965                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 966                 return -EIO;
 967         }
 968
 969         wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 970         if ((reg & BIT(10)) == BIT(10)) {
 971                 reg &= ~BIT(10);
 972                 wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
 973                 wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 974         }
 975
 976         reg |= BIT(10);
 977         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
 978         wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 979         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 980
 981         return (ret < 0) ? ret : 0;
 982 }
 983
 984 int wilc_wlan_stop(struct wilc *wilc)
 985 {
 986         u32 reg = 0;
 987         int ret;
 988         u8 timeout = 10;
 989
 990         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 991
 992         ret = wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 993         if (!ret) {
 994                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 995                 return ret;
 996         }
 997
 998         reg &= ~BIT(10);
 999         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
1000         if (!ret) {
1001                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1002                 return ret;
1003         }
1004
1005         do {
1006                 ret = wilc->hif_func->hif_read_reg(wilc,
1007                                                    WILC_GLB_RESET_0, &reg);
1008                 if (!ret) {
1009                         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1010                         return ret;
1011                 }
1012
1013                 if ((reg & BIT(10))) {
1014                         reg &= ~BIT(10);
1015                         ret = wilc->hif_func->hif_write_reg(wilc,
1016                                                             WILC_GLB_RESET_0,
1017                                                             reg);
1018                         timeout--;
1019                 } else {
1020                         ret = wilc->hif_func->hif_read_reg(wilc,
1021                                                            WILC_GLB_RESET_0,
1022                                                            &reg);
1023                         if (!ret) {
1024                                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1025                                 return ret;
1026                         }
1027                         break;
1028                 }
1029
1030         } while (timeout);
1031         reg = (BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(8) | BIT(9) | BIT(26) |
1032                BIT(29) | BIT(30) | BIT(31));
1033
1034         wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
1035         reg = (u32)~BIT(10);
1036
1037         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
1038
1039         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1040
1041         return ret;
1042 }
1043
1044 void wilc_wlan_cleanup(struct net_device *dev)
1045 {
1046         struct txq_entry_t *tqe;
1047         struct rxq_entry_t *rqe;
1048         u32 reg = 0;
1049         int ret;
1050         struct wilc_vif *vif = netdev_priv(dev);
1051         struct wilc *wilc = vif->wilc;
1052
1053         wilc->quit = 1;
1054         do {
1055                 tqe = wilc_wlan_txq_remove_from_head(dev);
1056                 if (!tqe)
1057                         break;
1058                 if (tqe->tx_complete_func)
1059                         tqe->tx_complete_func(tqe->priv, 0);
1060                 kfree(tqe);
1061         } while (1);
1062
1063         do {
1064                 rqe = wilc_wlan_rxq_remove(wilc);
1065                 if (!rqe)
1066                         break;
1067                 kfree(rqe);
1068         } while (1);
1069
1070         kfree(wilc->rx_buffer);
1071         wilc->rx_buffer = NULL;
1072         kfree(wilc->tx_buffer);
1073         wilc->tx_buffer = NULL;
1074
1075         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
1076
1077         ret = wilc->hif_func->hif_read_reg(wilc, WILC_GP_REG_0, &reg);
1078         if (!ret)
1079                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1080
1081         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_0,
1082                                         (reg | ABORT_INT));
1083         if (!ret)
1084                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1085
1086         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
1087         wilc->hif_func->hif_deinit(NULL);
1088 }
1089
1090 static int wilc_wlan_cfg_commit(struct wilc_vif *vif, int type,
1091                                 u32 drv_handler)
1092 {
1093         struct wilc *wilc = vif->wilc;
1094         struct wilc_cfg_frame *cfg = &wilc->cfg_frame;
1095         int total_len = wilc->cfg_frame_offset + 4 + DRIVER_HANDLER_SIZE;
1096         int seq_no = wilc->cfg_seq_no % 256;
1097         int driver_handler = (u32)drv_handler;
1098
1099         if (type == WILC_CFG_SET)
1100                 cfg->wid_header[0] = 'W';
1101         else
1102                 cfg->wid_header[0] = 'Q';
1103         cfg->wid_header[1] = seq_no;
1104         cfg->wid_header[2] = (u8)total_len;
1105         cfg->wid_header[3] = (u8)(total_len >> 8);
1106         cfg->wid_header[4] = (u8)driver_handler;
1107         cfg->wid_header[5] = (u8)(driver_handler >> 8);
1108         cfg->wid_header[6] = (u8)(driver_handler >> 16);
1109         cfg->wid_header[7] = (u8)(driver_handler >> 24);
1110         wilc->cfg_seq_no = seq_no;
1111
1112         if (!wilc_wlan_txq_add_cfg_pkt(vif, &cfg->wid_header[0], total_len))
1113                 return -1;
1114
1115         return 0;
1116 }
1117
1118 int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
1119                       u32 buffer_size, int commit, u32 drv_handler)
1120 {
1121         u32 offset;
1122         int ret_size;
1123         struct wilc *wilc = vif->wilc;
1124
1125         mutex_lock(&wilc->cfg_cmd_lock);
1126
1127         if (start)
1128                 wilc->cfg_frame_offset = 0;
1129
1130         offset = wilc->cfg_frame_offset;
1131         ret_size = wilc_wlan_cfg_set_wid(wilc->cfg_frame.frame, offset,
1132                                          wid, buffer, buffer_size);
1133         offset += ret_size;
1134         wilc->cfg_frame_offset = offset;
1135
1136         if (!commit) {
1137                 mutex_unlock(&wilc->cfg_cmd_lock);
1138                 return ret_size;
1139         }
1140
1141         netdev_dbg(vif->ndev, "%s: seqno[%d]\n", __func__, wilc->cfg_seq_no);
1142
1143         if (wilc_wlan_cfg_commit(vif, WILC_CFG_SET, drv_handler))
1144                 ret_size = 0;
1145
1146         if (!wait_for_completion_timeout(&wilc->cfg_event,
1147                                          msecs_to_jiffies(CFG_PKTS_TIMEOUT))) {
1148                 netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1149                 ret_size = 0;
1150         }
1151
1152         wilc->cfg_frame_offset = 0;
1153         wilc->cfg_seq_no += 1;
1154         mutex_unlock(&wilc->cfg_cmd_lock);
1155
1156         return ret_size;
1157 }
1158
1159 int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
1160                       u32 drv_handler)
1161 {
1162         u32 offset;
1163         int ret_size;
1164         struct wilc *wilc = vif->wilc;
1165
1166         mutex_lock(&wilc->cfg_cmd_lock);
1167
1168         if (start)
1169                 wilc->cfg_frame_offset = 0;
1170
1171         offset = wilc->cfg_frame_offset;
1172         ret_size = wilc_wlan_cfg_get_wid(wilc->cfg_frame.frame, offset, wid);
1173         offset += ret_size;
1174         wilc->cfg_frame_offset = offset;
1175
1176         if (!commit) {
1177                 mutex_unlock(&wilc->cfg_cmd_lock);
1178                 return ret_size;
1179         }
1180
1181         if (wilc_wlan_cfg_commit(vif, WILC_CFG_QUERY, drv_handler))
1182                 ret_size = 0;
1183
1184         if (!wait_for_completion_timeout(&wilc->cfg_event,
1185                                          msecs_to_jiffies(CFG_PKTS_TIMEOUT))) {
1186                 netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1187                 ret_size = 0;
1188         }
1189         wilc->cfg_frame_offset = 0;
1190         wilc->cfg_seq_no += 1;
1191         mutex_unlock(&wilc->cfg_cmd_lock);
1192
1193         return ret_size;
1194 }
1195
1196 int wilc_wlan_cfg_get_val(struct wilc *wl, u16 wid, u8 *buffer, u32 buffer_size)
1197 {
1198         return wilc_wlan_cfg_get_wid_value(wl, wid, buffer, buffer_size);
1199 }
1200
1201 int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
1202                          u32 count, u32 drv)
1203 {
1204         int i;
1205         int ret = 0;
1206
1207         if (mode == WILC_GET_CFG) {
1208                 for (i = 0; i < count; i++) {
1209                         if (!wilc_wlan_cfg_get(vif, !i,
1210                                                wids[i].id,
1211                                                (i == count - 1),
1212                                                drv)) {
1213                                 ret = -ETIMEDOUT;
1214                                 break;
1215                         }
1216                 }
1217                 for (i = 0; i < count; i++) {
1218                         wids[i].size = wilc_wlan_cfg_get_val(vif->wilc,
1219                                                              wids[i].id,
1220                                                              wids[i].val,
1221                                                              wids[i].size);
1222                 }
1223         } else if (mode == WILC_SET_CFG) {
1224                 for (i = 0; i < count; i++) {
1225                         if (!wilc_wlan_cfg_set(vif, !i,
1226                                                wids[i].id,
1227                                                wids[i].val,
1228                                                wids[i].size,
1229                                                (i == count - 1),
1230                                                drv)) {
1231                                 ret = -ETIMEDOUT;
1232                                 break;
1233                         }
1234                 }
1235         }
1236
1237         return ret;
1238 }
1239
1240 static u32 init_chip(struct net_device *dev)
1241 {
1242         u32 chipid;
1243         u32 reg, ret = 0;
1244         struct wilc_vif *vif = netdev_priv(dev);
1245         struct wilc *wilc = vif->wilc;
1246
1247         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
1248
1249         chipid = wilc_get_chipid(wilc, true);
1250
1251         if ((chipid & 0xfff) != 0xa0) {
1252                 ret = wilc->hif_func->hif_read_reg(wilc, 0x1118, &reg);
1253                 if (!ret) {
1254                         netdev_err(dev, "fail read reg 0x1118\n");
1255                         goto release;
1256                 }
1257                 reg |= BIT(0);
1258                 ret = wilc->hif_func->hif_write_reg(wilc, 0x1118, reg);
1259                 if (!ret) {
1260                         netdev_err(dev, "fail write reg 0x1118\n");
1261                         goto release;
1262                 }
1263                 ret = wilc->hif_func->hif_write_reg(wilc, 0xc0000, 0x71);
1264                 if (!ret) {
1265                         netdev_err(dev, "fail write reg 0xc0000\n");
1266                         goto release;
1267                 }
1268         }
1269
1270 release:
1271         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
1272
1273         return ret;
1274 }
1275
1276 u32 wilc_get_chipid(struct wilc *wilc, bool update)
1277 {
1278         static u32 chipid;
1279         u32 tempchipid = 0;
1280         u32 rfrevid = 0;
1281
1282         if (chipid == 0 || update) {
1283                 wilc->hif_func->hif_read_reg(wilc, 0x1000, &tempchipid);
1284                 wilc->hif_func->hif_read_reg(wilc, 0x13f4, &rfrevid);
1285                 if (!is_wilc1000(tempchipid)) {
1286                         chipid = 0;
1287                         return chipid;
1288                 }
1289                 if (tempchipid == 0x1002a0) {
1290                         if (rfrevid != 0x1)
1291                                 tempchipid = 0x1002a1;
1292                 } else if (tempchipid == 0x1002b0) {
1293                         if (rfrevid == 0x4)
1294                                 tempchipid = 0x1002b1;
1295                         else if (rfrevid != 0x3)
1296                                 tempchipid = 0x1002b2;
1297                 }
1298
1299                 chipid = tempchipid;
1300         }
1301         return chipid;
1302 }
1303
1304 int wilc_wlan_init(struct net_device *dev)
1305 {
1306         int ret = 0;
1307         struct wilc_vif *vif = netdev_priv(dev);
1308         struct wilc *wilc;
1309
1310         wilc = vif->wilc;
1311
1312         wilc->quit = 0;
1313
1314         if (!wilc->hif_func->hif_init(wilc, false)) {
1315                 ret = -EIO;
1316                 goto fail;
1317         }
1318
1319         if (!wilc->tx_buffer)
1320                 wilc->tx_buffer = kmalloc(LINUX_TX_SIZE, GFP_KERNEL);
1321
1322         if (!wilc->tx_buffer) {
1323                 ret = -ENOBUFS;
1324                 goto fail;
1325         }
1326
1327         if (!wilc->rx_buffer)
1328                 wilc->rx_buffer = kmalloc(LINUX_RX_SIZE, GFP_KERNEL);
1329
1330         if (!wilc->rx_buffer) {
1331                 ret = -ENOBUFS;
1332                 goto fail;
1333         }
1334
1335         if (!init_chip(dev)) {
1336                 ret = -EIO;
1337                 goto fail;
1338         }
1339
1340         return 1;
1341
1342 fail:
1343
1344         kfree(wilc->rx_buffer);
1345         wilc->rx_buffer = NULL;
1346         kfree(wilc->tx_buffer);
1347         wilc->tx_buffer = NULL;
1348
1349         return ret;
1350 }