drivers/staging/wilc1000/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 "cfg80211.h"
  10 #include "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_update_cnt;
 493
 494         mutex_lock(&wilc->txq_add_to_head_cs);
 495         tqe = wilc_wlan_txq_get_first(wilc);
 496         if (!tqe)
 497                 goto out_unlock;
 498         dev = tqe->vif->ndev;
 499         wilc_wlan_txq_filter_dup_tcp_ack(dev);
 500         i = 0;
 501         sum = 0;
 502         while (tqe && (i < (WILC_VMM_TBL_SIZE - 1))) {
 503                 if (tqe->type == WILC_CFG_PKT)
 504                         vmm_sz = ETH_CONFIG_PKT_HDR_OFFSET;
 505                 else if (tqe->type == WILC_NET_PKT)
 506                         vmm_sz = ETH_ETHERNET_HDR_OFFSET;
 507                 else
 508                         vmm_sz = HOST_HDR_OFFSET;
 509
 510                 vmm_sz += tqe->buffer_size;
 511
 512                 if (vmm_sz & 0x3)
 513                         vmm_sz = (vmm_sz + 4) & ~0x3;
 514
 515                 if ((sum + vmm_sz) > WILC_TX_BUFF_SIZE)
 516                         break;
 517
 518                 vmm_table[i] = vmm_sz / 4;
 519                 if (tqe->type == WILC_CFG_PKT)
 520                         vmm_table[i] |= BIT(10);
 521                 cpu_to_le32s(&vmm_table[i]);
 522
 523                 i++;
 524                 sum += vmm_sz;
 525                 tqe = wilc_wlan_txq_get_next(wilc, tqe);
 526         }
 527
 528         if (i == 0)
 529                 goto out_unlock;
 530         vmm_table[i] = 0x0;
 531
 532         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 533         counter = 0;
 534         func = wilc->hif_func;
 535         do {
 536                 ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, &reg);
 537                 if (ret)
 538                         break;
 539
 540                 if ((reg & 0x1) == 0)
 541                         break;
 542
 543                 counter++;
 544                 if (counter > 200) {
 545                         counter = 0;
 546                         ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, 0);
 547                         break;
 548                 }
 549         } while (!wilc->quit);
 550
 551         if (ret)
 552                 goto out_release_bus;
 553
 554         timeout = 200;
 555         do {
 556                 ret = func->hif_block_tx(wilc,
 557                                          WILC_VMM_TBL_RX_SHADOW_BASE,
 558                                          (u8 *)vmm_table,
 559                                          ((i + 1) * 4));
 560                 if (ret)
 561                         break;
 562
 563                 ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x2);
 564                 if (ret)
 565                         break;
 566
 567                 do {
 568                         ret = func->hif_read_reg(wilc, WILC_HOST_VMM_CTL, &reg);
 569                         if (ret)
 570                                 break;
 571                         if ((reg >> 2) & 0x1) {
 572                                 entries = ((reg >> 3) & 0x3f);
 573                                 break;
 574                         }
 575                         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 576                 } while (--timeout);
 577                 if (timeout <= 0) {
 578                         ret = func->hif_write_reg(wilc, WILC_HOST_VMM_CTL, 0x0);
 579                         break;
 580                 }
 581
 582                 if (ret)
 583                         break;
 584
 585                 if (entries == 0) {
 586                         ret = func->hif_read_reg(wilc, WILC_HOST_TX_CTRL, &reg);
 587                         if (ret)
 588                                 break;
 589                         reg &= ~BIT(0);
 590                         ret = func->hif_write_reg(wilc, WILC_HOST_TX_CTRL, reg);
 591                 }
 592         } while (0);
 593
 594         if (ret)
 595                 goto out_release_bus;
 596
 597         if (entries == 0) {
 598                 /*
 599                  * No VMM space available in firmware so retry to transmit
 600                  * the packet from tx queue.
 601                  */
 602                 ret = WILC_VMM_ENTRY_FULL_RETRY;
 603                 goto out_release_bus;
 604         }
 605
 606         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 607
 608         offset = 0;
 609         i = 0;
 610         do {
 611                 u32 header, buffer_offset;
 612                 char *bssid;
 613
 614                 tqe = wilc_wlan_txq_remove_from_head(dev);
 615                 if (!tqe)
 616                         break;
 617
 618                 vif = tqe->vif;
 619                 if (vmm_table[i] == 0)
 620                         break;
 621
 622                 le32_to_cpus(&vmm_table[i]);
 623                 vmm_sz = (vmm_table[i] & 0x3ff);
 624                 vmm_sz *= 4;
 625                 header = (tqe->type << 31) |
 626                          (tqe->buffer_size << 15) |
 627                          vmm_sz;
 628                 if (tqe->type == WILC_MGMT_PKT)
 629                         header |= BIT(30);
 630                 else
 631                         header &= ~BIT(30);
 632
 633                 cpu_to_le32s(&header);
 634                 memcpy(&txb[offset], &header, 4);
 635                 if (tqe->type == WILC_CFG_PKT) {
 636                         buffer_offset = ETH_CONFIG_PKT_HDR_OFFSET;
 637                 } else if (tqe->type == WILC_NET_PKT) {
 638                         bssid = tqe->vif->bssid;
 639                         buffer_offset = ETH_ETHERNET_HDR_OFFSET;
 640                         memcpy(&txb[offset + 8], bssid, 6);
 641                 } else {
 642                         buffer_offset = HOST_HDR_OFFSET;
 643                 }
 644
 645                 memcpy(&txb[offset + buffer_offset],
 646                        tqe->buffer, tqe->buffer_size);
 647                 offset += vmm_sz;
 648                 i++;
 649                 tqe->status = 1;
 650                 if (tqe->tx_complete_func)
 651                         tqe->tx_complete_func(tqe->priv, tqe->status);
 652                 if (tqe->ack_idx != NOT_TCP_ACK &&
 653                     tqe->ack_idx < MAX_PENDING_ACKS)
 654                         vif->ack_filter.pending_acks[tqe->ack_idx].txqe = NULL;
 655                 kfree(tqe);
 656         } while (--entries);
 657
 658         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 659
 660         ret = func->hif_clear_int_ext(wilc, ENABLE_TX_VMM);
 661         if (ret)
 662                 goto out_release_bus;
 663
 664         ret = func->hif_block_tx_ext(wilc, 0, txb, offset);
 665
 666 out_release_bus:
 667         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 668
 669 out_unlock:
 670         mutex_unlock(&wilc->txq_add_to_head_cs);
 671
 672 out_update_cnt:
 673         *txq_count = wilc->txq_entries;
 674         return ret;
 675 }
 676
 677 static void wilc_wlan_handle_rx_buff(struct wilc *wilc, u8 *buffer, int size)
 678 {
 679         int offset = 0;
 680         u32 header;
 681         u32 pkt_len, pkt_offset, tp_len;
 682         int is_cfg_packet;
 683         u8 *buff_ptr;
 684
 685         do {
 686                 buff_ptr = buffer + offset;
 687                 header = get_unaligned_le32(buff_ptr);
 688
 689                 is_cfg_packet = (header >> 31) & 0x1;
 690                 pkt_offset = (header >> 22) & 0x1ff;
 691                 tp_len = (header >> 11) & 0x7ff;
 692                 pkt_len = header & 0x7ff;
 693
 694                 if (pkt_len == 0 || tp_len == 0)
 695                         break;
 696
 697                 if (pkt_offset & IS_MANAGMEMENT) {
 698                         buff_ptr += HOST_HDR_OFFSET;
 699                         wilc_wfi_mgmt_rx(wilc, buff_ptr, pkt_len);
 700                 } else {
 701                         if (!is_cfg_packet) {
 702                                 if (pkt_len > 0) {
 703                                         wilc_frmw_to_host(wilc, buff_ptr,
 704                                                           pkt_len, pkt_offset);
 705                                 }
 706                         } else {
 707                                 struct wilc_cfg_rsp rsp;
 708
 709                                 buff_ptr += pkt_offset;
 710
 711                                 wilc_wlan_cfg_indicate_rx(wilc, buff_ptr,
 712                                                           pkt_len,
 713                                                           &rsp);
 714                                 if (rsp.type == WILC_CFG_RSP) {
 715                                         if (wilc->cfg_seq_no == rsp.seq_no)
 716                                                 complete(&wilc->cfg_event);
 717                                 } else if (rsp.type == WILC_CFG_RSP_STATUS) {
 718                                         wilc_mac_indicate(wilc);
 719                                 }
 720                         }
 721                 }
 722                 offset += tp_len;
 723         } while (offset < size);
 724 }
 725
 726 static void wilc_wlan_handle_rxq(struct wilc *wilc)
 727 {
 728         int size;
 729         u8 *buffer;
 730         struct rxq_entry_t *rqe;
 731
 732         while (!wilc->quit) {
 733                 rqe = wilc_wlan_rxq_remove(wilc);
 734                 if (!rqe)
 735                         break;
 736
 737                 buffer = rqe->buffer;
 738                 size = rqe->buffer_size;
 739                 wilc_wlan_handle_rx_buff(wilc, buffer, size);
 740
 741                 kfree(rqe);
 742         }
 743         if (wilc->quit)
 744                 complete(&wilc->cfg_event);
 745 }
 746
 747 static void wilc_unknown_isr_ext(struct wilc *wilc)
 748 {
 749         wilc->hif_func->hif_clear_int_ext(wilc, 0);
 750 }
 751
 752 static void wilc_wlan_handle_isr_ext(struct wilc *wilc, u32 int_status)
 753 {
 754         u32 offset = wilc->rx_buffer_offset;
 755         u8 *buffer = NULL;
 756         u32 size;
 757         u32 retries = 0;
 758         int ret = 0;
 759         struct rxq_entry_t *rqe;
 760
 761         size = (int_status & 0x7fff) << 2;
 762
 763         while (!size && retries < 10) {
 764                 wilc->hif_func->hif_read_size(wilc, &size);
 765                 size = (size & 0x7fff) << 2;
 766                 retries++;
 767         }
 768
 769         if (size <= 0)
 770                 return;
 771
 772         if (WILC_RX_BUFF_SIZE - offset < size)
 773                 offset = 0;
 774
 775         buffer = &wilc->rx_buffer[offset];
 776
 777         wilc->hif_func->hif_clear_int_ext(wilc, DATA_INT_CLR | ENABLE_RX_VMM);
 778         ret = wilc->hif_func->hif_block_rx_ext(wilc, 0, buffer, size);
 779         if (ret)
 780                 return;
 781
 782         offset += size;
 783         wilc->rx_buffer_offset = offset;
 784         rqe = kmalloc(sizeof(*rqe), GFP_KERNEL);
 785         if (!rqe)
 786                 return;
 787
 788         rqe->buffer = buffer;
 789         rqe->buffer_size = size;
 790         wilc_wlan_rxq_add(wilc, rqe);
 791         wilc_wlan_handle_rxq(wilc);
 792 }
 793
 794 void wilc_handle_isr(struct wilc *wilc)
 795 {
 796         u32 int_status;
 797
 798         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 799         wilc->hif_func->hif_read_int(wilc, &int_status);
 800
 801         if (int_status & DATA_INT_EXT)
 802                 wilc_wlan_handle_isr_ext(wilc, int_status);
 803
 804         if (!(int_status & (ALL_INT_EXT)))
 805                 wilc_unknown_isr_ext(wilc);
 806
 807         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 808 }
 809 EXPORT_SYMBOL_GPL(wilc_handle_isr);
 810
 811 int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer,
 812                                 u32 buffer_size)
 813 {
 814         u32 offset;
 815         u32 addr, size, size2, blksz;
 816         u8 *dma_buffer;
 817         int ret = 0;
 818
 819         blksz = BIT(12);
 820
 821         dma_buffer = kmalloc(blksz, GFP_KERNEL);
 822         if (!dma_buffer)
 823                 return -EIO;
 824
 825         offset = 0;
 826         do {
 827                 addr = get_unaligned_le32(&buffer[offset]);
 828                 size = get_unaligned_le32(&buffer[offset + 4]);
 829                 acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 830                 offset += 8;
 831                 while (((int)size) && (offset < buffer_size)) {
 832                         if (size <= blksz)
 833                                 size2 = size;
 834                         else
 835                                 size2 = blksz;
 836
 837                         memcpy(dma_buffer, &buffer[offset], size2);
 838                         ret = wilc->hif_func->hif_block_tx(wilc, addr,
 839                                                            dma_buffer, size2);
 840                         if (ret)
 841                                 break;
 842
 843                         addr += size2;
 844                         offset += size2;
 845                         size -= size2;
 846                 }
 847                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 848
 849                 if (ret)
 850                         goto fail;
 851         } while (offset < buffer_size);
 852
 853 fail:
 854
 855         kfree(dma_buffer);
 856
 857         return ret;
 858 }
 859
 860 int wilc_wlan_start(struct wilc *wilc)
 861 {
 862         u32 reg = 0;
 863         int ret;
 864         u32 chipid;
 865
 866         if (wilc->io_type == WILC_HIF_SDIO) {
 867                 reg = 0;
 868                 reg |= BIT(3);
 869         } else if (wilc->io_type == WILC_HIF_SPI) {
 870                 reg = 1;
 871         }
 872         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
 873         ret = wilc->hif_func->hif_write_reg(wilc, WILC_VMM_CORE_CFG, reg);
 874         if (ret) {
 875                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 876                 return ret;
 877         }
 878         reg = 0;
 879         if (wilc->io_type == WILC_HIF_SDIO && wilc->dev_irq_num)
 880                 reg |= WILC_HAVE_SDIO_IRQ_GPIO;
 881
 882         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_1, reg);
 883         if (ret) {
 884                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 885                 return ret;
 886         }
 887
 888         wilc->hif_func->hif_sync_ext(wilc, NUM_INT_EXT);
 889
 890         ret = wilc->hif_func->hif_read_reg(wilc, 0x1000, &chipid);
 891         if (ret) {
 892                 release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 893                 return ret;
 894         }
 895
 896         wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 897         if ((reg & BIT(10)) == BIT(10)) {
 898                 reg &= ~BIT(10);
 899                 wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
 900                 wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 901         }
 902
 903         reg |= BIT(10);
 904         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg);
 905         wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, &reg);
 906         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
 907
 908         return ret;
 909 }
 910
 911 int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif)
 912 {
 913         u32 reg = 0;
 914         int ret;
 915
 916         acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP);
 917
 918         ret = wilc->hif_func->hif_read_reg(wilc, WILC_GP_REG_0, &reg);
 919         if (ret) {
 920                 netdev_err(vif->ndev, "Error while reading reg\n");
 921                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 922                 return ret;
 923         }
 924
 925         ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_0,
 926                                         (reg | WILC_ABORT_REQ_BIT));
 927         if (ret) {
 928                 netdev_err(vif->ndev, "Error while writing reg\n");
 929                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 930                 return ret;
 931         }
 932
 933         ret = wilc->hif_func->hif_read_reg(wilc, WILC_FW_HOST_COMM, &reg);
 934         if (ret) {
 935                 netdev_err(vif->ndev, "Error while reading reg\n");
 936                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 937                 return ret;
 938         }
 939         reg = BIT(0);
 940
 941         ret = wilc->hif_func->hif_write_reg(wilc, WILC_FW_HOST_COMM, reg);
 942         if (ret) {
 943                 netdev_err(vif->ndev, "Error while writing reg\n");
 944                 release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 945                 return ret;
 946         }
 947
 948         release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP);
 949
 950         return 0;
 951 }
 952
 953 void wilc_wlan_cleanup(struct net_device *dev)
 954 {
 955         struct txq_entry_t *tqe;
 956         struct rxq_entry_t *rqe;
 957         struct wilc_vif *vif = netdev_priv(dev);
 958         struct wilc *wilc = vif->wilc;
 959
 960         wilc->quit = 1;
 961         while ((tqe = wilc_wlan_txq_remove_from_head(dev))) {
 962                 if (tqe->tx_complete_func)
 963                         tqe->tx_complete_func(tqe->priv, 0);
 964                 kfree(tqe);
 965         }
 966
 967         while ((rqe = wilc_wlan_rxq_remove(wilc)))
 968                 kfree(rqe);
 969
 970         kfree(wilc->rx_buffer);
 971         wilc->rx_buffer = NULL;
 972         kfree(wilc->tx_buffer);
 973         wilc->tx_buffer = NULL;
 974         wilc->hif_func->hif_deinit(NULL);
 975 }
 976
 977 static int wilc_wlan_cfg_commit(struct wilc_vif *vif, int type,
 978                                 u32 drv_handler)
 979 {
 980         struct wilc *wilc = vif->wilc;
 981         struct wilc_cfg_frame *cfg = &wilc->cfg_frame;
 982         int t_len = wilc->cfg_frame_offset + sizeof(struct wilc_cfg_cmd_hdr);
 983
 984         if (type == WILC_CFG_SET)
 985                 cfg->hdr.cmd_type = 'W';
 986         else
 987                 cfg->hdr.cmd_type = 'Q';
 988
 989         cfg->hdr.seq_no = wilc->cfg_seq_no % 256;
 990         cfg->hdr.total_len = cpu_to_le16(t_len);
 991         cfg->hdr.driver_handler = cpu_to_le32(drv_handler);
 992         wilc->cfg_seq_no = cfg->hdr.seq_no;
 993
 994         if (!wilc_wlan_txq_add_cfg_pkt(vif, (u8 *)&cfg->hdr, t_len))
 995                 return -1;
 996
 997         return 0;
 998 }
 999
1000 int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
1001                       u32 buffer_size, int commit, u32 drv_handler)
1002 {
1003         u32 offset;
1004         int ret_size;
1005         struct wilc *wilc = vif->wilc;
1006
1007         mutex_lock(&wilc->cfg_cmd_lock);
1008
1009         if (start)
1010                 wilc->cfg_frame_offset = 0;
1011
1012         offset = wilc->cfg_frame_offset;
1013         ret_size = wilc_wlan_cfg_set_wid(wilc->cfg_frame.frame, offset,
1014                                          wid, buffer, buffer_size);
1015         offset += ret_size;
1016         wilc->cfg_frame_offset = offset;
1017
1018         if (!commit) {
1019                 mutex_unlock(&wilc->cfg_cmd_lock);
1020                 return ret_size;
1021         }
1022
1023         netdev_dbg(vif->ndev, "%s: seqno[%d]\n", __func__, wilc->cfg_seq_no);
1024
1025         if (wilc_wlan_cfg_commit(vif, WILC_CFG_SET, drv_handler))
1026                 ret_size = 0;
1027
1028         if (!wait_for_completion_timeout(&wilc->cfg_event,
1029                                          WILC_CFG_PKTS_TIMEOUT)) {
1030                 netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1031                 ret_size = 0;
1032         }
1033
1034         wilc->cfg_frame_offset = 0;
1035         wilc->cfg_seq_no += 1;
1036         mutex_unlock(&wilc->cfg_cmd_lock);
1037
1038         return ret_size;
1039 }
1040
1041 int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
1042                       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_get_wid(wilc->cfg_frame.frame, offset, wid);
1055         offset += ret_size;
1056         wilc->cfg_frame_offset = offset;
1057
1058         if (!commit) {
1059                 mutex_unlock(&wilc->cfg_cmd_lock);
1060                 return ret_size;
1061         }
1062
1063         if (wilc_wlan_cfg_commit(vif, WILC_CFG_QUERY, drv_handler))
1064                 ret_size = 0;
1065
1066         if (!wait_for_completion_timeout(&wilc->cfg_event,
1067                                          WILC_CFG_PKTS_TIMEOUT)) {
1068                 netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
1069                 ret_size = 0;
1070         }
1071         wilc->cfg_frame_offset = 0;
1072         wilc->cfg_seq_no += 1;
1073         mutex_unlock(&wilc->cfg_cmd_lock);
1074
1075         return ret_size;
1076 }
1077
1078 int wilc_send_config_pkt(struct wilc_vif *vif, u8 mode, struct wid *wids,
1079                          u32 count)
1080 {
1081         int i;
1082         int ret = 0;
1083         u32 drv = wilc_get_vif_idx(vif);
1084
1085         if (mode == WILC_GET_CFG) {
1086                 for (i = 0; i < count; i++) {
1087                         if (!wilc_wlan_cfg_get(vif, !i,
1088                                                wids[i].id,
1089                                                (i == count - 1),
1090                                                drv)) {
1091                                 ret = -ETIMEDOUT;
1092                                 break;
1093                         }
1094                 }
1095                 for (i = 0; i < count; i++) {
1096                         wids[i].size = wilc_wlan_cfg_get_val(vif->wilc,
1097                                                              wids[i].id,
1098                                                              wids[i].val,
1099                                                              wids[i].size);
1100                 }
1101         } else if (mode == WILC_SET_CFG) {
1102                 for (i = 0; i < count; i++) {
1103                         if (!wilc_wlan_cfg_set(vif, !i,
1104                                                wids[i].id,
1105                                                wids[i].val,
1106                                                wids[i].size,
1107                                                (i == count - 1),
1108                                                drv)) {
1109                                 ret = -ETIMEDOUT;
1110                                 break;
1111                         }
1112                 }
1113         }
1114
1115         return ret;
1116 }
1117
1118 static int init_chip(struct net_device *dev)
1119 {
1120         u32 chipid;
1121         u32 reg;
1122         int ret = 0;
1123         struct wilc_vif *vif = netdev_priv(dev);
1124         struct wilc *wilc = vif->wilc;
1125
1126         acquire_bus(wilc, WILC_BUS_ACQUIRE_ONLY);
1127
1128         chipid = wilc_get_chipid(wilc, true);
1129
1130         if ((chipid & 0xfff) != 0xa0) {
1131                 ret = wilc->hif_func->hif_read_reg(wilc, 0x1118, &reg);
1132                 if (ret) {
1133                         netdev_err(dev, "fail read reg 0x1118\n");
1134                         goto release;
1135                 }
1136                 reg |= BIT(0);
1137                 ret = wilc->hif_func->hif_write_reg(wilc, 0x1118, reg);
1138                 if (ret) {
1139                         netdev_err(dev, "fail write reg 0x1118\n");
1140                         goto release;
1141                 }
1142                 ret = wilc->hif_func->hif_write_reg(wilc, 0xc0000, 0x71);
1143                 if (ret) {
1144                         netdev_err(dev, "fail write reg 0xc0000\n");
1145                         goto release;
1146                 }
1147         }
1148
1149 release:
1150         release_bus(wilc, WILC_BUS_RELEASE_ONLY);
1151
1152         return ret;
1153 }
1154
1155 u32 wilc_get_chipid(struct wilc *wilc, bool update)
1156 {
1157         static u32 chipid;
1158         u32 tempchipid = 0;
1159         u32 rfrevid = 0;
1160
1161         if (chipid == 0 || update) {
1162                 wilc->hif_func->hif_read_reg(wilc, 0x1000, &tempchipid);
1163                 wilc->hif_func->hif_read_reg(wilc, 0x13f4, &rfrevid);
1164                 if (!is_wilc1000(tempchipid)) {
1165                         chipid = 0;
1166                         return chipid;
1167                 }
1168                 if (tempchipid == 0x1002a0) {
1169                         if (rfrevid != 0x1)
1170                                 tempchipid = 0x1002a1;
1171                 } else if (tempchipid == 0x1002b0) {
1172                         if (rfrevid == 0x4)
1173                                 tempchipid = 0x1002b1;
1174                         else if (rfrevid != 0x3)
1175                                 tempchipid = 0x1002b2;
1176                 }
1177
1178                 chipid = tempchipid;
1179         }
1180         return chipid;
1181 }
1182
1183 int wilc_wlan_init(struct net_device *dev)
1184 {
1185         int ret = 0;
1186         struct wilc_vif *vif = netdev_priv(dev);
1187         struct wilc *wilc;
1188
1189         wilc = vif->wilc;
1190
1191         wilc->quit = 0;
1192
1193         if (wilc->hif_func->hif_init(wilc, false)) {
1194                 ret = -EIO;
1195                 goto fail;
1196         }
1197
1198         if (!wilc->tx_buffer)
1199                 wilc->tx_buffer = kmalloc(WILC_TX_BUFF_SIZE, GFP_KERNEL);
1200
1201         if (!wilc->tx_buffer) {
1202                 ret = -ENOBUFS;
1203                 goto fail;
1204         }
1205
1206         if (!wilc->rx_buffer)
1207                 wilc->rx_buffer = kmalloc(WILC_RX_BUFF_SIZE, GFP_KERNEL);
1208
1209         if (!wilc->rx_buffer) {
1210                 ret = -ENOBUFS;
1211                 goto fail;
1212         }
1213
1214         if (init_chip(dev)) {
1215                 ret = -EIO;
1216                 goto fail;
1217         }
1218
1219         return 0;
1220
1221 fail:
1222
1223         kfree(wilc->rx_buffer);
1224         wilc->rx_buffer = NULL;
1225         kfree(wilc->tx_buffer);
1226         wilc->tx_buffer = NULL;
1227
1228         return ret;
1229 }