drivers/staging/wilc1000/wilc_wlan.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries.
   4  * All rights reserved.
   5  */
   6
   7 #include <linux/if_ether.h>
   8 #include <linux/ip.h>
   9 #include "wilc_wfi_cfgoperations.h"
  10 #include "wilc_wlan_cfg.h"
  11
  12 static inline bool is_wilc1000(u32 id)
  13 {
  14         return (id & 0xfffff000) == 0x100000;
  15 }
  16
  17 static inline void acquire_bus(struct wilc *wilc, enum bus_acquire acquire)
  18 {
  19         mutex_lock(&wilc->hif_cs);
  20         if (acquire == WILC_BUS_ACQUIRE_AND_WAKEUP)
  21                 chip_wakeup(wilc);
  22 }
  23
  24 static inline void release_bus(struct wilc *wilc, enum bus_release release)
  25 {
  26         if (release == WILC_BUS_RELEASE_ALLOW_SLEEP)
  27                 chip_allow_sleep(wilc);
  28         mutex_unlock(&wilc->hif_cs);
  29 }
  30
  31 static void wilc_wlan_txq_remove(struct wilc *wilc, struct txq_entry_t *tqe)
  32 {
  33         list_del(&tqe->list);
  34         wilc->txq_entries -= 1;
  35 }
  36
  37 static struct txq_entry_t *
  38 wilc_wlan_txq_remove_from_head(struct net_device *dev)
  39 {
  40         struct txq_entry_t *tqe = NULL;
  41         unsigned long flags;
  42         struct wilc_vif *vif = netdev_priv(dev);
  43         struct wilc *wilc = vif->wilc;
  44
  45         spin_lock_irqsave(&wilc->txq_spinlock, flags);
  46
  47         if (!list_empty(&wilc->txq_head.list)) {
  48                 tqe = list_first_entry(&wilc->txq_head.list, struct txq_entry_t,
  49                                        list);
  50                 list_del(&tqe->list);
  51                 wilc->txq_entries -= 1;
  52         }
  53         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
  54         return tqe;
  55 }
  56
  57 static void wilc_wlan_txq_add_to_tail(struct net_device *dev,
  58                                       struct txq_entry_t *tqe)
  59 {
  60         unsigned long flags;
  61         struct wilc_vif *vif = netdev_priv(dev);
  62         struct wilc *wilc = vif->wilc;
  63
  64         spin_lock_irqsave(&wilc->txq_spinlock, flags);
  65
  66         list_add_tail(&tqe->list, &wilc->txq_head.list);
  67         wilc->txq_entries += 1;
  68
  69         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
  70
  71         complete(&wilc->txq_event);
  72 }
  73
  74 static void wilc_wlan_txq_add_to_head(struct wilc_vif *vif,
  75                                       struct txq_entry_t *tqe)
  76 {
  77         unsigned long flags;
  78         struct wilc *wilc = vif->wilc;
  79
  80         mutex_lock(&wilc->txq_add_to_head_cs);
  81
  82         spin_lock_irqsave(&wilc->txq_spinlock, flags);
  83
  84         list_add(&tqe->list, &wilc->txq_head.list);
  85         wilc->txq_entries += 1;
  86
  87         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
  88         mutex_unlock(&wilc->txq_add_to_head_cs);
  89         complete(&wilc->txq_event);
  90 }
  91
  92 #define NOT_TCP_ACK                     (-1)
  93
  94 static inline void add_tcp_session(struct wilc_vif *vif, u32 src_prt,
  95                                    u32 dst_prt, u32 seq)
  96 {
  97         struct tcp_ack_filter *f = &vif->ack_filter;
  98
  99         if (f->tcp_session < 2 * MAX_TCP_SESSION) {
 100                 f->ack_session_info[f->tcp_session].seq_num = seq;
 101                 f->ack_session_info[f->tcp_session].bigger_ack_num = 0;
 102                 f->ack_session_info[f->tcp_session].src_port = src_prt;
 103                 f->ack_session_info[f->tcp_session].dst_port = dst_prt;
 104                 f->tcp_session++;
 105         }
 106 }
 107
 108 static inline void update_tcp_session(struct wilc_vif *vif, u32 index, u32 ack)
 109 {
 110         struct tcp_ack_filter *f = &vif->ack_filter;
 111
 112         if (index < 2 * MAX_TCP_SESSION &&
 113             ack > f->ack_session_info[index].bigger_ack_num)
 114                 f->ack_session_info[index].bigger_ack_num = ack;
 115 }
 116
 117 static inline void add_tcp_pending_ack(struct wilc_vif *vif, u32 ack,
 118                                        u32 session_index,
 119                                        struct txq_entry_t *txqe)
 120 {
 121         struct tcp_ack_filter *f = &vif->ack_filter;
 122         u32 i = f->pending_base + f->pending_acks_idx;
 123
 124         if (i < MAX_PENDING_ACKS) {
 125                 f->pending_acks[i].ack_num = ack;
 126                 f->pending_acks[i].txqe = txqe;
 127                 f->pending_acks[i].session_index = session_index;
 128                 txqe->ack_idx = i;
 129                 f->pending_acks_idx++;
 130         }
 131 }
 132
 133 static inline void tcp_process(struct net_device *dev, struct txq_entry_t *tqe)
 134 {
 135         void *buffer = tqe->buffer;
 136         const struct ethhdr *eth_hdr_ptr = buffer;
 137         int i;
 138         unsigned long flags;
 139         struct wilc_vif *vif = netdev_priv(dev);
 140         struct wilc *wilc = vif->wilc;
 141         struct tcp_ack_filter *f = &vif->ack_filter;
 142         const struct iphdr *ip_hdr_ptr;
 143         const struct tcphdr *tcp_hdr_ptr;
 144         u32 ihl, total_length, data_offset;
 145
 146         spin_lock_irqsave(&wilc->txq_spinlock, flags);
 147
 148         if (eth_hdr_ptr->h_proto != htons(ETH_P_IP))
 149                 goto out;
 150
 151         ip_hdr_ptr = buffer + ETH_HLEN;
 152
 153         if (ip_hdr_ptr->protocol != IPPROTO_TCP)
 154                 goto out;
 155
 156         ihl = ip_hdr_ptr->ihl << 2;
 157         tcp_hdr_ptr = buffer + ETH_HLEN + ihl;
 158         total_length = ntohs(ip_hdr_ptr->tot_len);
 159
 160         data_offset = tcp_hdr_ptr->doff << 2;
 161         if (total_length == (ihl + data_offset)) {
 162                 u32 seq_no, ack_no;
 163
 164                 seq_no = ntohl(tcp_hdr_ptr->seq);
 165                 ack_no = ntohl(tcp_hdr_ptr->ack_seq);
 166                 for (i = 0; i < f->tcp_session; i++) {
 167                         u32 j = f->ack_session_info[i].seq_num;
 168
 169                         if (i < 2 * MAX_TCP_SESSION &&
 170                             j == seq_no) {
 171                                 update_tcp_session(vif, i, ack_no);
 172                                 break;
 173                         }
 174                 }
 175                 if (i == f->tcp_session)
 176                         add_tcp_session(vif, 0, 0, seq_no);
 177
 178                 add_tcp_pending_ack(vif, ack_no, i, tqe);
 179         }
 180
 181 out:
 182         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
 183 }
 184
 185 static void wilc_wlan_txq_filter_dup_tcp_ack(struct net_device *dev)
 186 {
 187         struct wilc_vif *vif = netdev_priv(dev);
 188         struct wilc *wilc = vif->wilc;
 189         struct tcp_ack_filter *f = &vif->ack_filter;
 190         u32 i = 0;
 191         u32 dropped = 0;
 192         unsigned long flags;
 193
 194         spin_lock_irqsave(&wilc->txq_spinlock, flags);
 195         for (i = f->pending_base;
 196              i < (f->pending_base + f->pending_acks_idx); i++) {
 197                 u32 index;
 198                 u32 bigger_ack_num;
 199
 200                 if (i >= MAX_PENDING_ACKS)
 201                         break;
 202
 203                 index = f->pending_acks[i].session_index;
 204
 205                 if (index >= 2 * MAX_TCP_SESSION)
 206                         break;
 207
 208                 bigger_ack_num = f->ack_session_info[index].bigger_ack_num;
 209
 210                 if (f->pending_acks[i].ack_num < bigger_ack_num) {
 211                         struct txq_entry_t *tqe;
 212
 213                         tqe = f->pending_acks[i].txqe;
 214                         if (tqe) {
 215                                 wilc_wlan_txq_remove(wilc, tqe);
 216                                 tqe->status = 1;
 217                                 if (tqe->tx_complete_func)
 218                                         tqe->tx_complete_func(tqe->priv,
 219                                                               tqe->status);
 220                                 kfree(tqe);
 221                                 dropped++;
 222                         }
 223                 }
 224         }
 225         f->pending_acks_idx = 0;
 226         f->tcp_session = 0;
 227
 228         if (f->pending_base == 0)
 229                 f->pending_base = MAX_TCP_SESSION;
 230         else
 231                 f->pending_base = 0;
 232
 233         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
 234
 235         while (dropped > 0) {
 236                 wait_for_completion_timeout(&wilc->txq_event,
 237                                             msecs_to_jiffies(1));
 238                 dropped--;
 239         }
 240 }
 241
 242 void wilc_enable_tcp_ack_filter(struct wilc_vif *vif, bool value)
 243 {
 244         vif->ack_filter.enabled = value;
 245 }
 246
 247 static int wilc_wlan_txq_add_cfg_pkt(struct wilc_vif *vif, u8 *buffer,
 248                                      u32 buffer_size)
 249 {
 250         struct txq_entry_t *tqe;
 251         struct wilc *wilc = vif->wilc;
 252
 253         netdev_dbg(vif->ndev, "Adding config packet ...\n");
 254         if (wilc->quit) {
 255                 netdev_dbg(vif->ndev, "Return due to clear function\n");
 256                 complete(&wilc->cfg_event);
 257                 return 0;
 258         }
 259
 260         tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
 261         if (!tqe)
 262                 return 0;
 263
 264         tqe->type = WILC_CFG_PKT;
 265         tqe->buffer = buffer;
 266         tqe->buffer_size = buffer_size;
 267         tqe->tx_complete_func = NULL;
 268         tqe->priv = NULL;
 269         tqe->ack_idx = NOT_TCP_ACK;
 270         tqe->vif = vif;
 271
 272         wilc_wlan_txq_add_to_head(vif, tqe);
 273
 274         return 1;
 275 }
 276
 277 int wilc_wlan_txq_add_net_pkt(struct net_device *dev, void *priv, u8 *buffer,
 278                               u32 buffer_size,
 279                               void (*tx_complete_fn)(void *, int))
 280 {
 281         struct txq_entry_t *tqe;
 282         struct wilc_vif *vif = netdev_priv(dev);
 283         struct wilc *wilc;
 284
 285         wilc = vif->wilc;
 286
 287         if (wilc->quit)
 288                 return 0;
 289
 290         tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
 291
 292         if (!tqe)
 293                 return 0;
 294         tqe->type = WILC_NET_PKT;
 295         tqe->buffer = buffer;
 296         tqe->buffer_size = buffer_size;
 297         tqe->tx_complete_func = tx_complete_fn;
 298         tqe->priv = priv;
 299         tqe->vif = vif;
 300
 301         tqe->ack_idx = NOT_TCP_ACK;
 302         if (vif->ack_filter.enabled)
 303                 tcp_process(dev, tqe);
 304         wilc_wlan_txq_add_to_tail(dev, tqe);
 305         return wilc->txq_entries;
 306 }
 307
 308 int wilc_wlan_txq_add_mgmt_pkt(struct net_device *dev, void *priv, u8 *buffer,
 309                                u32 buffer_size,
 310                                void (*tx_complete_fn)(void *, int))
 311 {
 312         struct txq_entry_t *tqe;
 313         struct wilc_vif *vif = netdev_priv(dev);
 314         struct wilc *wilc;
 315
 316         wilc = vif->wilc;
 317
 318         if (wilc->quit)
 319                 return 0;
 320
 321         tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
 322
 323         if (!tqe)
 324                 return 0;
 325         tqe->type = WILC_MGMT_PKT;
 326         tqe->buffer = buffer;
 327         tqe->buffer_size = buffer_size;
 328         tqe->tx_complete_func = tx_complete_fn;
 329         tqe->priv = priv;
 330         tqe->ack_idx = NOT_TCP_ACK;
 331         tqe->vif = vif;
 332         wilc_wlan_txq_add_to_tail(dev, tqe);
 333         return 1;
 334 }
 335
 336 static struct txq_entry_t *wilc_wlan_txq_get_first(struct wilc *wilc)
 337 {
 338         struct txq_entry_t *tqe = NULL;
 339         unsigned long flags;
 340
 341         spin_lock_irqsave(&wilc->txq_spinlock, flags);
 342
 343         if (!list_empty(&wilc->txq_head.list))
 344                 tqe = list_first_entry(&wilc->txq_head.list, struct txq_entry_t,
 345                                        list);
 346
 347         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
 348
 349         return tqe;
 350 }
 351
 352 static struct txq_entry_t *wilc_wlan_txq_get_next(struct wilc *wilc,
 353                                                   struct txq_entry_t *tqe)
 354 {
 355         unsigned long flags;
 356
 357         spin_lock_irqsave(&wilc->txq_spinlock, flags);
 358
 359         if (!list_is_last(&tqe->list, &wilc->txq_head.list))
 360                 tqe = list_next_entry(tqe, list);
 361         else
 362                 tqe = NULL;
 363         spin_unlock_irqrestore(&wilc->txq_spinlock, flags);
 364
 365         return tqe;
 366 }
 367
 368 static void wilc_wlan_rxq_add(struct wilc *wilc, struct rxq_entry_t *rqe)
 369 {
 370         if (wilc->quit)
 371                 return;
 372
 373         mutex_lock(&wilc->rxq_cs);
 374         list_add_tail(&rqe->list, &wilc->rxq_head.list);
 375         mutex_unlock(&wilc->rxq_cs);
 376 }
 377
 378 static struct rxq_entry_t *wilc_wlan_rxq_remove(struct wilc *wilc)
 379 {
 380         struct rxq_entry_t *rqe = NULL;
 381
 382         mutex_lock(&wilc->rxq_cs);
 383         if (!list_empty(&wilc->rxq_head.list)) {
 384                 rqe = list_first_entry(&wilc->rxq_head.list, struct rxq_entry_t,
 385                                        list);
 386                 list_del(&rqe->list);
 387         }
 388         mutex_unlock(&wilc->rxq_cs);
 389         return rqe;
 390 }
 391
 392 void chip_allow_sleep(struct wilc *wilc)
 393 {
 394         u32 reg = 0;
 395
 396         wilc->hif_func->hif_read_reg(wilc, 0xf0, &reg);
 397
 398         wilc->hif_func->hif_write_reg(wilc, 0xf0, reg & ~BIT(0));
 399         wilc->hif_func->hif_write_reg(wilc, 0xfa, 0);
 400 }
 401 EXPORT_SYMBOL_GPL(chip_allow_sleep);
 402
 403 void chip_wakeup(struct wilc *wilc)
 404 {
 405         u32 reg, clk_status_reg;
 406
 407         if ((wilc->io_type & 0x1) == WILC_HIF_SPI) {
 408                 do {
 409                         wilc->hif_func->hif_read_reg(wilc, 1, &reg);
 410                         wilc->hif_func->hif_write_reg(wilc, 1, reg | BIT(1));
 411                         wilc->hif_func->hif_write_reg(wilc, 1, reg & ~BIT(1));
 412
 413                         do {
 414                                 usleep_range(2000, 2500);
 415                                 wilc_get_chipid(wilc, true);
 416                         } while (wilc_get_chipid(wilc, true) == 0);
 417                 } while (wilc_get_chipid(wilc, true) == 0);
 418         } else if ((wilc->io_type & 0x1) == WILC_HIF_SDIO) {
 419                 wilc->hif_func->hif_write_reg(wilc, 0xfa, 1);
 420                 usleep_range(200, 400);
 421                 wilc->hif_func->hif_read_reg(wilc, 0xf0, &reg);
 422                 do {
 423                         wilc->hif_func->hif_write_reg(wilc, 0xf0,
 424                                                       reg | BIT(0));
 425                         wilc->hif_func->hif_read_reg(wilc, 0xf1,
 426                                                      &clk_status_reg);
 427
 428                         while ((clk_status_reg & 0x1) == 0) {
 429                                 usleep_range(2000, 2500);
 430
 431                                 wilc->hif_func->hif_read_reg(wilc, 0xf1,
 432                                                              &clk_status_reg);
 433                         }
 434                         if ((clk_status_reg & 0x1) == 0) {
 435                                 wilc->hif_func->hif_write_reg(wilc, 0xf0,
 436                                                               reg & (~BIT(0)));
 437                         }
 438                 } while ((clk_status_reg & 0x1) == 0);
 439         }
 440
 441         if (wilc->chip_ps_state == WILC_CHIP_SLEEPING_MANUAL) {
 442                 if (wilc_get_chipid(wilc, false) < 0x1002b0) {
 443                         u32 val32;
 444
 445                         wilc->hif_func->hif_read_reg(wilc, 0x1e1c, &val32);
 446                         val32 |= BIT(6);
 447                         wilc->hif_func->hif_write_reg(wilc, 0x1e1c, val32);
 448
 449                         wilc->hif_func->hif_read_reg(wilc, 0x1e9c, &val32);
 450                         val32 |= BIT(6);
 451                         wilc->hif_func->hif_write_reg(wilc, 0x1e9c, val32);
 452                 }
 453         }
 454         wilc->chip_ps_state = WILC_CHIP_WAKEDUP;
 455 }
 456 EXPORT_SYMBOL_GPL(chip_wakeup);
 457
 458 void host_wakeup_notify(struct wilc *wilc)
 459 {
 460         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 461         wilc->hif_func->hif_write_reg(wilc, 0x10b0, 1);
 462         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 463 }
 464 EXPORT_SYMBOL_GPL(host_wakeup_notify);
 465
 466 void host_sleep_notify(struct wilc *wilc)
 467 {
 468         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 469         wilc->hif_func->hif_write_reg(wilc, 0x10ac, 1);
 470         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 471 }
 472 EXPORT_SYMBOL_GPL(host_sleep_notify);
 473
 474 int wilc_wlan_handle_txq(struct wilc *wilc, u32 *txq_count)
 475 {
 476         int i, entries = 0;
 477         u32 sum;
 478         u32 reg;
 479         u32 offset = 0;
 480         int vmm_sz = 0;
 481         struct txq_entry_t *tqe;
 482         int ret = 0;
 483         int counter;
 484         int timeout;
 485         u32 vmm_table[WILC_VMM_TBL_SIZE];
 486         const struct wilc_hif_func *func;
 487         u8 *txb = wilc->tx_buffer;
 488         struct net_device *dev;
 489         struct wilc_vif *vif;
 490
 491         if (wilc->quit)
 492                 goto out;
 493
 494         mutex_lock(&wilc->txq_add_to_head_cs);
 495         tqe = wilc_wlan_txq_get_first(wilc);
 496         if (!tqe)
 497                 goto out;
 498         dev = tqe->vif->ndev;
 499         wilc_wlan_txq_filter_dup_tcp_ack(dev);
 500         i = 0;
 501         sum = 0;
 502         do {
 503                 if (tqe && (i < (WILC_VMM_TBL_SIZE - 1))) {
 504                         if (tqe->type == WILC_CFG_PKT)
 505                                 vmm_sz = ETH_CONFIG_PKT_HDR_OFFSET;
 506
 507                         else if (tqe->type == WILC_NET_PKT)
 508                                 vmm_sz = ETH_ETHERNET_HDR_OFFSET;
 509
 510                         else
 511                                 vmm_sz = HOST_HDR_OFFSET;
 512
 513                         vmm_sz += tqe->buffer_size;
 514
 515                         if (vmm_sz & 0x3)
 516                                 vmm_sz = (vmm_sz + 4) & ~0x3;
 517
 518                         if ((sum + vmm_sz) > WILC_TX_BUFF_SIZE)
 519                                 break;
 520
 521                         vmm_table[i] = vmm_sz / 4;
 522                         if (tqe->type == WILC_CFG_PKT)
 523                                 vmm_table[i] |= BIT(10);
 524                         cpu_to_le32s(&vmm_table[i]);
 525
 526                         i++;
 527                         sum += vmm_sz;
 528                         tqe = wilc_wlan_txq_get_next(wilc, tqe);
 529                 } else {
 530                         break;
 531                 }
 532         } while (1);
 533
 534         if (i == 0)
 535                 goto out;
 536         vmm_table[i] = 0x0;
 537
 538         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 539         counter = 0;
 540         func = wilc->hif_func;
 541         do {
 542                 ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, &reg);
 543                 if (!ret)
 544                         break;
 545
 546                 if ((reg & 0x1) == 0)
 547                         break;
 548
 549                 counter++;
 550                 if (counter > 200) {
 551                         counter = 0;
 552                         ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, 0);
 553                         break;
 554                 }
 555         } while (!wilc->quit);
 556
 557         if (!ret)
 558                 goto out_release_bus;
 559
 560         timeout = 200;
 561         do {
 562                 ret = func->hif_block_tx(wilc,
 563                                          WILC_VMM_TBL_RX_SHADOW_BASE,
 564                                          (u8 *)vmm_table,
 565                                          ((i + 1) * 4));
 566                 if (!ret)
 567                         break;
 568
 569                 ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x2);
 570                 if (!ret)
 571                         break;
 572
 573                 do {
 574                         ret = func->hif_read_reg(wilc, WILC_HOST_VMM_CTL, &reg);
 575                         if (!ret)
 576                                 break;
 577                         if ((reg >> 2) & 0x1) {
 578                                 entries = ((reg >> 3) & 0x3f);
 579                                 break;
 580                         }
 581                         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 582                 } while (--timeout);
 583                 if (timeout <= 0) {
 584                         ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x0);
 585                         break;
 586                 }
 587
 588                 if (!ret)
 589                         break;
 590
 591                 if (entries == 0) {
 592                         ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, &reg);
 593                         if (!ret)
 594                                 break;
 595                         reg &= ~BIT(0);
 596                         ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, reg);
 597                         if (!ret)
 598                                 break;
 599                         break;
 600                 }
 601                 break;
 602         } while (1);
 603
 604         if (!ret)
 605                 goto out_release_bus;
 606
 607         if (entries == 0) {
 608                 ret = -ENOBUFS;
 609                 goto out_release_bus;
 610         }
 611
 612         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 613
 614         offset = 0;
 615         i = 0;
 616         do {
 617                 u32 header, buffer_offset;
 618                 char *bssid;
 619
 620                 tqe = wilc_wlan_txq_remove_from_head(dev);
 621                 if (!tqe)
 622                         break;
 623
 624                 vif = tqe->vif;
 625                 if (vmm_table[i] == 0)
 626                         break;
 627
 628                 le32_to_cpus(&vmm_table[i]);
 629                 vmm_sz = (vmm_table[i] & 0x3ff);
 630                 vmm_sz *= 4;
 631                 header = (tqe->type << 31) |
 632                          (tqe->buffer_size << 15) |
 633                          vmm_sz;
 634                 if (tqe->type == WILC_MGMT_PKT)
 635                         header |= BIT(30);
 636                 else
 637                         header &= ~BIT(30);
 638
 639                 cpu_to_le32s(&header);
 640                 memcpy(&txb[offset], &header, 4);
 641                 if (tqe->type == WILC_CFG_PKT) {
 642                         buffer_offset = ETH_CONFIG_PKT_HDR_OFFSET;
 643                 } else if (tqe->type == WILC_NET_PKT) {
 644                         bssid = tqe->vif->bssid;
 645                         buffer_offset = ETH_ETHERNET_HDR_OFFSET;
 646                         memcpy(&txb[offset + 8], bssid, 6);
 647                 } else {
 648                         buffer_offset = HOST_HDR_OFFSET;
 649                 }
 650
 651                 memcpy(&txb[offset + buffer_offset],
 652                        tqe->buffer, tqe->buffer_size);
 653                 offset += vmm_sz;
 654                 i++;
 655                 tqe->status = 1;
 656                 if (tqe->tx_complete_func)
 657                         tqe->tx_complete_func(tqe->priv, tqe->status);
 658                 if (tqe->ack_idx != NOT_TCP_ACK &&
 659                     tqe->ack_idx < MAX_PENDING_ACKS)
 660                         vif->ack_filter.pending_acks[tqe->ack_idx].txqe = NULL;
 661                 kfree(tqe);
 662         } while (--entries);
 663
 664         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 665
 666         ret = func->hif_clear_int_ext(wilc, ENABLE_TX_VMM);
 667         if (!ret)
 668                 goto out_release_bus;
 669
 670         ret = func->hif_block_tx_ext(wilc, 0, txb, offset);
 671
 672 out_release_bus:
 673         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 674
 675 out:
 676         mutex_unlock(&wilc->txq_add_to_head_cs);
 677
 678         *txq_count = wilc->txq_entries;
 679         return ret;
 680 }
 681
 682 static void wilc_wlan_handle_rx_buff(struct wilc *wilc, u8 *buffer, int size)
 683 {
 684         int offset = 0;
 685         u32 header;
 686         u32 pkt_len, pkt_offset, tp_len;
 687         int is_cfg_packet;
 688         u8 *buff_ptr;
 689
 690         do {
 691                 buff_ptr = buffer + offset;
 692                 header = get_unaligned_le32(buff_ptr);
 693
 694                 is_cfg_packet = (header >> 31) & 0x1;
 695                 pkt_offset = (header >> 22) & 0x1ff;
 696                 tp_len = (header >> 11) & 0x7ff;
 697                 pkt_len = header & 0x7ff;
 698
 699                 if (pkt_len == 0 || tp_len == 0)
 700                         break;
 701
 702                 if (pkt_offset & IS_MANAGMEMENT) {
 703                         buff_ptr += HOST_HDR_OFFSET;
 704                         wilc_wfi_mgmt_rx(wilc, buff_ptr, pkt_len);
 705                 } else {
 706                         if (!is_cfg_packet) {
 707                                 if (pkt_len > 0) {
 708                                         wilc_frmw_to_host(wilc, buff_ptr,
 709                                                           pkt_len, pkt_offset);
 710                                 }
 711                         } else {
 712                                 struct wilc_cfg_rsp rsp;
 713
 714                                 buff_ptr += pkt_offset;
 715
 716                                 wilc_wlan_cfg_indicate_rx(wilc, buff_ptr,
 717                                                           pkt_len,
 718                                                           &rsp);
 719                                 if (rsp.type == WILC_CFG_RSP) {
 720                                         if (wilc->cfg_seq_no == rsp.seq_no)
 721                                                 complete(&wilc->cfg_event);
 722                                 } else if (rsp.type == WILC_CFG_RSP_STATUS) {
 723                                         wilc_mac_indicate(wilc);
 724                                 }
 725                         }
 726                 }
 727                 offset += tp_len;
 728                 if (offset >= size)
 729                         break;
 730         } while (1);
 731 }
 732
 733 static void wilc_wlan_handle_rxq(struct wilc *wilc)
 734 {
 735         int size;
 736         u8 *buffer;
 737         struct rxq_entry_t *rqe;
 738
 739         do {
 740                 if (wilc->quit) {
 741                         complete(&wilc->cfg_event);
 742                         break;
 743                 }
 744                 rqe = wilc_wlan_rxq_remove(wilc);
 745                 if (!rqe)
 746                         break;
 747
 748                 buffer = rqe->buffer;
 749                 size = rqe->buffer_size;
 750                 wilc_wlan_handle_rx_buff(wilc, buffer, size);
 751
 752                 kfree(rqe);
 753         } while (1);
 754 }
 755
 756 static void wilc_unknown_isr_ext(struct wilc *wilc)
 757 {
 758         wilc->hif_func->hif_clear_int_ext(wilc, 0);
 759 }
 760
 761 static void wilc_wlan_handle_isr_ext(struct wilc *wilc, u32 int_status)
 762 {
 763         u32 offset = wilc->rx_buffer_offset;
 764         u8 *buffer = NULL;
 765         u32 size;
 766         u32 retries = 0;
 767         int ret = 0;
 768         struct rxq_entry_t *rqe;
 769
 770         size = (int_status & 0x7fff) << 2;
 771
 772         while (!size && retries < 10) {
 773                 wilc->hif_func->hif_read_size(wilc, &size);
 774                 size = (size & 0x7fff) << 2;
 775                 retries++;
 776         }
 777
 778         if (size <= 0)
 779                 return;
 780
 781         if (WILC_RX_BUFF_SIZE - offset < size)
 782                 offset = 0;
 783
 784         buffer = &wilc->rx_buffer[offset];
 785
 786         wilc->hif_func->hif_clear_int_ext(wilc, DATA_INT_CLR | ENABLE_RX_VMM);
 787         ret = wilc->hif_func->hif_block_rx_ext(wilc, 0, buffer, size);
 788         if (!ret)
 789                 return;
 790
 791         offset += size;
 792         wilc->rx_buffer_offset = offset;
 793         rqe = kmalloc(sizeof(*rqe), GFP_KERNEL);
 794         if (!rqe)
 795                 return;
 796
 797         rqe->buffer = buffer;
 798         rqe->buffer_size = size;
 799         wilc_wlan_rxq_add(wilc, rqe);
 800         wilc_wlan_handle_rxq(wilc);
 801 }
 802
 803 void wilc_handle_isr(struct wilc *wilc)
 804 {
 805         u32 int_status;
 806
 807         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 808         wilc->hif_func->hif_read_int(wilc, &int_status);
 809
 810         if (int_status & DATA_INT_EXT)
 811                 wilc_wlan_handle_isr_ext(wilc, int_status);
 812
 813         if (!(int_status & (ALL_INT_EXT)))
 814                 wilc_unknown_isr_ext(wilc);
 815
 816         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 817 }
 818 EXPORT_SYMBOL_GPL(wilc_handle_isr);
 819
 820 int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
 821                                 u32 buffer_size)
 822 {
 823         u32 offset;
 824         u32 addr, size, size2, blksz;
 825         u8 *dma_buffer;
 826         int ret = 0;
 827
 828         blksz = BIT(12);
 829
 830         dma_buffer = kmalloc(blksz, GFP_KERNEL);
 831         if (!dma_buffer)
 832                 return -EIO;
 833
 834         offset = 0;
 835         do {
 836                 addr = get_unaligned_le32(&buffer[offset]);
 837                 size = get_unaligned_le32(&buffer[offset + 4]);
 838                 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 839                 offset += 8;
 840                 while (((int)size) && (offset < buffer_size)) {
 841                         if (size <= blksz)
 842                                 size2 = size;
 843                         else
 844                                 size2 = blksz;
 845
 846                         memcpy(dma_buffer, &buffer[offset], size2);
 847                         ret = wilc->hif_func->hif_block_tx(wilc, addr,
 848                                                            dma_buffer, size2);
 849                         if (!ret)
 850                                 break;
 851
 852                         addr += size2;
 853                         offset += size2;
 854                         size -= size2;
 855                 }
 856                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 857
 858                 if (!ret) {
 859                         ret = -EIO;
 860                         goto fail;
 861                 }
 862         } while (offset < buffer_size);
 863
 864 fail:
 865
 866         kfree(dma_buffer);
 867
 868         return (ret < 0) ? ret : 0;
 869 }
 870
 871 int wilc_wlan_start(struct wilc *wilc)
 872 {
 873         u32 reg = 0;
 874         int ret;
 875         u32 chipid;
 876
 877         if (wilc->io_type == WILC_HIF_SDIO) {
 878                 reg = 0;
 879                 reg |= BIT(3);
 880         } else if (wilc->io_type == WILC_HIF_SPI) {
 881                 reg = 1;
 882         }
 883         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 884         ret = wilc->hif_func->hif_write_reg(wilc, WILC_VMM_CORE_CFG, reg);
 885         if (!ret) {
 886                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 887                 return -EIO;
 888         }
 889         reg = 0;
 890         if (wilc->io_type == WILC_HIF_SDIO && wilc->dev_irq_num)
 891                 reg |= WILC_HAVE_SDIO_IRQ_GPIO;
 892
 893 #ifdef WILC_DISABLE_PMU
 894 #else
 895         reg |= WILC_HAVE_USE_PMU;
 896 #endif
 897
 898 #ifdef WILC_SLEEP_CLK_SRC_XO
 899         reg |= WILC_HAVE_SLEEP_CLK_SRC_XO;
 900 #elif defined WILC_SLEEP_CLK_SRC_RTC
 901         reg |= WILC_HAVE_SLEEP_CLK_SRC_RTC;
 902 #endif
 903
 904 #ifdef WILC_EXT_PA_INV_TX_RX
 905         reg |= WILC_HAVE_EXT_PA_INV_TX_RX;
 906 #endif
 907         reg |= WILC_HAVE_USE_IRQ_AS_HOST_WAKE;
 908         reg |= WILC_HAVE_LEGACY_RF_SETTINGS;
 909 #ifdef XTAL_24
 910         reg |= WILC_HAVE_XTAL_24;
 911 #endif
 912 #ifdef DISABLE_WILC_UART
 913         reg |= WILC_HAVE_DISABLE_WILC_UART;
 914 #endif
 915
 916         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_1, reg);
 917         if (!ret) {
 918                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 919                 return -EIO;
 920         }
 921
 922         wilc->hif_func->hif_sync_ext(wilc, NUM_INT_EXT);
 923
 924         ret = wilc->hif_func->hif_read_reg(wilc, 0x1000, &chipid);
 925         if (!ret) {
 926                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 927                 return -EIO;
 928         }
 929
 930         wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 931         if ((reg & BIT(10)) == BIT(10)) {
 932                 reg &= ~BIT(10);
 933                 wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
 934                 wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 935         }
 936
 937         reg |= BIT(10);
 938         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
 939         wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 940         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 941
 942         return (ret < 0) ? ret : 0;
 943 }
 944
 945 int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif)
 946 {
 947         u32 reg = 0;
 948         int ret;
 949
 950         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 951
 952         ret = wilc->hif_func->hif_read_reg(wilc, WILC_GP_REG_0, &reg);
 953         if (!ret) {
 954                 netdev_err(vif->ndev, "Error while reading reg\n");
 955                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 956                 return -EIO;
 957         }
 958
 959         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_0,
 960                                         (reg | WILC_ABORT_REQ_BIT));
 961         if (!ret) {
 962                 netdev_err(vif->ndev, "Error while writing reg\n");
 963                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 964                 return -EIO;
 965         }
 966
 967         ret = wilc->hif_func->hif_read_reg(wilc, WILC_FW_HOST_COMM, &reg);
 968         if (!ret) {
 969                 netdev_err(vif->ndev, "Error while reading reg\n");
 970                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 971                 return -EIO;
 972         }
 973         reg = BIT(0);
 974
 975         ret = wilc->hif_func->hif_write_reg(wilc, WILC_FW_HOST_COMM, reg);
 976         if (!ret) {
 977                 netdev_err(vif->ndev, "Error while writing reg\n");
 978                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 979                 return -EIO;
 980         }
 981
 982         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 983
 984         return 0;
 985 }
 986
 987 void wilc_wlan_cleanup(struct net_device *dev)
 988 {
 989         struct txq_entry_t *tqe;
 990         struct rxq_entry_t *rqe;
 991         struct wilc_vif *vif = netdev_priv(dev);
 992         struct wilc *wilc = vif->wilc;
 993
 994         wilc->quit = 1;
 995         do {
 996                 tqe = wilc_wlan_txq_remove_from_head(dev);
 997                 if (!tqe)
 998                         break;
 999                 if (tqe->tx_complete_func)
1000                         tqe->tx_complete_func(tqe->priv, 0);
1001                 kfree(tqe);
1002         } while (1);
1003
1004         do {
1005                 rqe = wilc_wlan_rxq_remove(wilc);
1006                 if (!rqe)
1007                         break;
1008                 kfree(rqe);
1009         } while (1);
1010
1011         kfree(wilc->rx_buffer);
1012         wilc->rx_buffer = NULL;
1013         kfree(wilc->tx_buffer);
1014         wilc->tx_buffer = NULL;
1015         wilc->hif_func->hif_deinit(NULL);
1016 }
1017
1018 static int wilc_wlan_cfg_commit(struct wilc_vif *vif, int type,
1019                                 u32 drv_handler)
1020 {
1021         struct wilc *wilc = vif->wilc;
1022         struct wilc_cfg_frame *cfg = &wilc->cfg_frame;
1023         int t_len = wilc->cfg_frame_offset + sizeof(struct wilc_cfg_cmd_hdr);
1024
1025         if (type == WILC_CFG_SET)
1026                 cfg->hdr.cmd_type = 'W';
1027         else
1028                 cfg->hdr.cmd_type = 'Q';
1029
1030         cfg->hdr.seq_no = wilc->cfg_seq_no % 256;
1031         cfg->hdr.total_len = cpu_to_le16(t_len);
1032         cfg->hdr.driver_handler = cpu_to_le32(drv_handler);
1033         wilc->cfg_seq_no = cfg->hdr.seq_no;
1034
1035         if (!wilc_wlan_txq_add_cfg_pkt(vif, (u8 *)&cfg->hdr, t_len))
1036                 return -1;
1037
1038         return 0;
1039 }
1040
1041 int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
1042                       u32 buffer_size, int commit, u32 drv_handler)
1043 {
1044         u32 offset;
1045         int ret_size;
1046         struct wilc *wilc = vif->wilc;
1047
1048         mutex_lock(&wilc->cfg_cmd_lock);
1049
1050         if (start)
1051                 wilc->cfg_frame_offset = 0;
1052
1053         offset = wilc->cfg_frame_offset;
1054         ret_size = wilc_wlan_cfg_set_wid(wilc->cfg_frame.frame, offset,
1055                                          wid, buffer, buffer_size);
1056         offset += ret_size;
1057         wilc->cfg_frame_offset = offset;
1058
1059         if (!commit) {
1060                 mutex_unlock(&wilc->cfg_cmd_lock);
1061                 return ret_size;
1062         }
1063
1064         netdev_dbg(vif->ndev, "%s: seqno[%d]\n", __func__, wilc->cfg_seq_no);
1065
1066         if (wilc_wlan_cfg_commit(vif, WILC_CFG_SET, drv_handler))
1067                 ret_size = 0;
1068
1069         if (!wait_for_completion_timeout(&wilc->cfg_event,
1070                                          WILC_CFG_PKTS_TIMEOUT)) {
1071                 netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1072                 ret_size = 0;
1073         }
1074
1075         wilc->cfg_frame_offset = 0;
1076         wilc->cfg_seq_no += 1;
1077         mutex_unlock(&wilc->cfg_cmd_lock);
1078
1079         return ret_size;
1080 }
1081
1082 int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
1083                       u32 drv_handler)
1084 {
1085         u32 offset;
1086         int ret_size;
1087         struct wilc *wilc = vif->wilc;
1088
1089         mutex_lock(&wilc->cfg_cmd_lock);
1090
1091         if (start)
1092                 wilc->cfg_frame_offset = 0;
1093
1094         offset = wilc->cfg_frame_offset;
1095         ret_size = wilc_wlan_cfg_get_wid(wilc->cfg_frame.frame, offset, wid);
1096         offset += ret_size;
1097         wilc->cfg_frame_offset = offset;
1098
1099         if (!commit) {
1100                 mutex_unlock(&wilc->cfg_cmd_lock);
1101                 return ret_size;
1102         }
1103
1104         if (wilc_wlan_cfg_commit(vif, WILC_CFG_QUERY, drv_handler))
1105                 ret_size = 0;
1106
1107         if (!wait_for_completion_timeout(&wilc->cfg_event,
1108                                          WILC_CFG_PKTS_TIMEOUT)) {
1109                 netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1110                 ret_size = 0;
1111         }
1112         wilc->cfg_frame_offset = 0;
1113         wilc->cfg_seq_no += 1;
1114         mutex_unlock(&wilc->cfg_cmd_lock);
1115
1116         return ret_size;
1117 }
1118
1119 int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
1120                          u32 count)
1121 {
1122         int i;
1123         int ret = 0;
1124         u32 drv = wilc_get_vif_idx(vif);
1125
1126         if (mode == WILC_GET_CFG) {
1127                 for (i = 0; i < count; i++) {
1128                         if (!wilc_wlan_cfg_get(vif, !i,
1129                                                wids[i].id,
1130                                                (i == count - 1),
1131                                                drv)) {
1132                                 ret = -ETIMEDOUT;
1133                                 break;
1134                         }
1135                 }
1136                 for (i = 0; i < count; i++) {
1137                         wids[i].size = wilc_wlan_cfg_get_val(vif->wilc,
1138                                                              wids[i].id,
1139                                                              wids[i].val,
1140                                                              wids[i].size);
1141                 }
1142         } else if (mode == WILC_SET_CFG) {
1143                 for (i = 0; i < count; i++) {
1144                         if (!wilc_wlan_cfg_set(vif, !i,
1145                                                wids[i].id,
1146                                                wids[i].val,
1147                                                wids[i].size,
1148                                                (i == count - 1),
1149                                                drv)) {
1150                                 ret = -ETIMEDOUT;
1151                                 break;
1152                         }
1153                 }
1154         }
1155
1156         return ret;
1157 }
1158
1159 static u32 init_chip(struct net_device *dev)
1160 {
1161         u32 chipid;
1162         u32 reg, ret = 0;
1163         struct wilc_vif *vif = netdev_priv(dev);
1164         struct wilc *wilc = vif->wilc;
1165
1166         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
1167
1168         chipid = wilc_get_chipid(wilc, true);
1169
1170         if ((chipid & 0xfff) != 0xa0) {
1171                 ret = wilc->hif_func->hif_read_reg(wilc, 0x1118, &reg);
1172                 if (!ret) {
1173                         netdev_err(dev, "fail read reg 0x1118\n");
1174                         goto release;
1175                 }
1176                 reg |= BIT(0);
1177                 ret = wilc->hif_func->hif_write_reg(wilc, 0x1118, reg);
1178                 if (!ret) {
1179                         netdev_err(dev, "fail write reg 0x1118\n");
1180                         goto release;
1181                 }
1182                 ret = wilc->hif_func->hif_write_reg(wilc, 0xc0000, 0x71);
1183                 if (!ret) {
1184                         netdev_err(dev, "fail write reg 0xc0000\n");
1185                         goto release;
1186                 }
1187         }
1188
1189 release:
1190         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
1191
1192         return ret;
1193 }
1194
1195 u32 wilc_get_chipid(struct wilc *wilc, bool update)
1196 {
1197         static u32 chipid;
1198         u32 tempchipid = 0;
1199         u32 rfrevid = 0;
1200
1201         if (chipid == 0 || update) {
1202                 wilc->hif_func->hif_read_reg(wilc, 0x1000, &tempchipid);
1203                 wilc->hif_func->hif_read_reg(wilc, 0x13f4, &rfrevid);
1204                 if (!is_wilc1000(tempchipid)) {
1205                         chipid = 0;
1206                         return chipid;
1207                 }
1208                 if (tempchipid == 0x1002a0) {
1209                         if (rfrevid != 0x1)
1210                                 tempchipid = 0x1002a1;
1211                 } else if (tempchipid == 0x1002b0) {
1212                         if (rfrevid == 0x4)
1213                                 tempchipid = 0x1002b1;
1214                         else if (rfrevid != 0x3)
1215                                 tempchipid = 0x1002b2;
1216                 }
1217
1218                 chipid = tempchipid;
1219         }
1220         return chipid;
1221 }
1222
1223 int wilc_wlan_init(struct net_device *dev)
1224 {
1225         int ret = 0;
1226         struct wilc_vif *vif = netdev_priv(dev);
1227         struct wilc *wilc;
1228
1229         wilc = vif->wilc;
1230
1231         wilc->quit = 0;
1232
1233         if (!wilc->hif_func->hif_init(wilc, false)) {
1234                 ret = -EIO;
1235                 goto fail;
1236         }
1237
1238         if (!wilc->tx_buffer)
1239                 wilc->tx_buffer = kmalloc(WILC_TX_BUFF_SIZE, GFP_KERNEL);
1240
1241         if (!wilc->tx_buffer) {
1242                 ret = -ENOBUFS;
1243                 goto fail;
1244         }
1245
1246         if (!wilc->rx_buffer)
1247                 wilc->rx_buffer = kmalloc(WILC_RX_BUFF_SIZE, GFP_KERNEL);
1248
1249         if (!wilc->rx_buffer) {
1250                 ret = -ENOBUFS;
1251                 goto fail;
1252         }
1253
1254         if (!init_chip(dev)) {
1255                 ret = -EIO;
1256                 goto fail;
1257         }
1258
1259         return 1;
1260
1261 fail:
1262
1263         kfree(wilc->rx_buffer);
1264         wilc->rx_buffer = NULL;
1265         kfree(wilc->tx_buffer);
1266         wilc->tx_buffer = NULL;
1267
1268         return ret;
1269 }