main.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * This file is part of wl1251
   4 *
   5 * Copyright (C) 2008-2009 Nokia Corporation
   6 */
   7
   8#include <linux/module.h>
   9#include <linux/interrupt.h>
  10#include <linux/firmware.h>
  11#include <linux/delay.h>
  12#include <linux/irq.h>
  13#include <linux/crc32.h>
  14#include <linux/etherdevice.h>
  15#include <linux/vmalloc.h>
  16#include <linux/slab.h>
  17#include <linux/netdevice.h>
  18
  19#include "wl1251.h"
  20#include "wl12xx_80211.h"
  21#include "reg.h"
  22#include "io.h"
  23#include "cmd.h"
  24#include "event.h"
  25#include "tx.h"
  26#include "rx.h"
  27#include "ps.h"
  28#include "init.h"
  29#include "debugfs.h"
  30#include "boot.h"
  31
  32void wl1251_enable_interrupts(struct wl1251 *wl)
  33{
  34	wl->if_ops->enable_irq(wl);
  35}
  36
  37void wl1251_disable_interrupts(struct wl1251 *wl)
  38{
  39	wl->if_ops->disable_irq(wl);
  40}
  41
  42static int wl1251_power_off(struct wl1251 *wl)
  43{
  44	return wl->if_ops->power(wl, false);
  45}
  46
  47static int wl1251_power_on(struct wl1251 *wl)
  48{
  49	return wl->if_ops->power(wl, true);
  50}
  51
  52static int wl1251_fetch_firmware(struct wl1251 *wl)
  53{
  54	const struct firmware *fw;
  55	struct device *dev = wiphy_dev(wl->hw->wiphy);
  56	int ret;
  57
  58	ret = request_firmware(&fw, WL1251_FW_NAME, dev);
  59
  60	if (ret < 0) {
  61		wl1251_error("could not get firmware: %d", ret);
  62		return ret;
  63	}
  64
  65	if (fw->size % 4) {
  66		wl1251_error("firmware size is not multiple of 32 bits: %zu",
  67			     fw->size);
  68		ret = -EILSEQ;
  69		goto out;
  70	}
  71
  72	wl->fw_len = fw->size;
  73	wl->fw = vmalloc(wl->fw_len);
  74
  75	if (!wl->fw) {
  76		wl1251_error("could not allocate memory for the firmware");
  77		ret = -ENOMEM;
  78		goto out;
  79	}
  80
  81	memcpy(wl->fw, fw->data, wl->fw_len);
  82
  83	ret = 0;
  84
  85out:
  86	release_firmware(fw);
  87
  88	return ret;
  89}
  90
  91static int wl1251_fetch_nvs(struct wl1251 *wl)
  92{
  93	const struct firmware *fw;
  94	struct device *dev = wiphy_dev(wl->hw->wiphy);
  95	int ret;
  96
  97	ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
  98
  99	if (ret < 0) {
 100		wl1251_error("could not get nvs file: %d", ret);
 101		return ret;
 102	}
 103
 104	if (fw->size % 4) {
 105		wl1251_error("nvs size is not multiple of 32 bits: %zu",
 106			     fw->size);
 107		ret = -EILSEQ;
 108		goto out;
 109	}
 110
 111	wl->nvs = kmemdup(fw->data, fw->size, GFP_KERNEL);
 112
 113	if (!wl->nvs) {
 114		wl1251_error("could not allocate memory for the nvs file");
 115		ret = -ENOMEM;
 116		goto out;
 117	}
 118
 119	wl->nvs_len = fw->size;
 120
 121	ret = 0;
 122
 123out:
 124	release_firmware(fw);
 125
 126	return ret;
 127}
 128
 129static void wl1251_fw_wakeup(struct wl1251 *wl)
 130{
 131	u32 elp_reg;
 132
 133	elp_reg = ELPCTRL_WAKE_UP;
 134	wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 135	elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
 136
 137	if (!(elp_reg & ELPCTRL_WLAN_READY))
 138		wl1251_warning("WLAN not ready");
 139}
 140
 141static int wl1251_chip_wakeup(struct wl1251 *wl)
 142{
 143	int ret;
 144
 145	ret = wl1251_power_on(wl);
 146	if (ret < 0)
 147		return ret;
 148
 149	msleep(WL1251_POWER_ON_SLEEP);
 150	wl->if_ops->reset(wl);
 151
 152	/* We don't need a real memory partition here, because we only want
 153	 * to use the registers at this point. */
 154	wl1251_set_partition(wl,
 155			     0x00000000,
 156			     0x00000000,
 157			     REGISTERS_BASE,
 158			     REGISTERS_DOWN_SIZE);
 159
 160	/* ELP module wake up */
 161	wl1251_fw_wakeup(wl);
 162
 163	/* whal_FwCtrl_BootSm() */
 164
 165	/* 0. read chip id from CHIP_ID */
 166	wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
 167
 168	/* 1. check if chip id is valid */
 169
 170	switch (wl->chip_id) {
 171	case CHIP_ID_1251_PG12:
 172		wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
 173			     wl->chip_id);
 174		break;
 175	case CHIP_ID_1251_PG11:
 176		wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
 177			     wl->chip_id);
 178		break;
 179	case CHIP_ID_1251_PG10:
 180	default:
 181		wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
 182		ret = -ENODEV;
 183		goto out;
 184	}
 185
 186	if (wl->fw == NULL) {
 187		ret = wl1251_fetch_firmware(wl);
 188		if (ret < 0)
 189			goto out;
 190	}
 191
 192out:
 193	return ret;
 194}
 195
 196#define WL1251_IRQ_LOOP_COUNT 10
 197static void wl1251_irq_work(struct work_struct *work)
 198{
 199	u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
 200	struct wl1251 *wl =
 201		container_of(work, struct wl1251, irq_work);
 202	int ret;
 203
 204	mutex_lock(&wl->mutex);
 205
 206	wl1251_debug(DEBUG_IRQ, "IRQ work");
 207
 208	if (wl->state == WL1251_STATE_OFF)
 209		goto out;
 210
 211	ret = wl1251_ps_elp_wakeup(wl);
 212	if (ret < 0)
 213		goto out;
 214
 215	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
 216
 217	intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 218	wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
 219
 220	do {
 221		if (wl->data_path) {
 222			wl->rx_counter = wl1251_mem_read32(
 223				wl, wl->data_path->rx_control_addr);
 224
 225			/* We handle a frmware bug here */
 226			switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
 227			case 0:
 228				wl1251_debug(DEBUG_IRQ,
 229					     "RX: FW and host in sync");
 230				intr &= ~WL1251_ACX_INTR_RX0_DATA;
 231				intr &= ~WL1251_ACX_INTR_RX1_DATA;
 232				break;
 233			case 1:
 234				wl1251_debug(DEBUG_IRQ, "RX: FW +1");
 235				intr |= WL1251_ACX_INTR_RX0_DATA;
 236				intr &= ~WL1251_ACX_INTR_RX1_DATA;
 237				break;
 238			case 2:
 239				wl1251_debug(DEBUG_IRQ, "RX: FW +2");
 240				intr |= WL1251_ACX_INTR_RX0_DATA;
 241				intr |= WL1251_ACX_INTR_RX1_DATA;
 242				break;
 243			default:
 244				wl1251_warning(
 245					"RX: FW and host out of sync: %d",
 246					wl->rx_counter - wl->rx_handled);
 247				break;
 248			}
 249
 250			wl->rx_handled = wl->rx_counter;
 251
 252			wl1251_debug(DEBUG_IRQ, "RX counter: %d",
 253				     wl->rx_counter);
 254		}
 255
 256		intr &= wl->intr_mask;
 257
 258		if (intr == 0) {
 259			wl1251_debug(DEBUG_IRQ, "INTR is 0");
 260			goto out_sleep;
 261		}
 262
 263		if (intr & WL1251_ACX_INTR_RX0_DATA) {
 264			wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
 265			wl1251_rx(wl);
 266		}
 267
 268		if (intr & WL1251_ACX_INTR_RX1_DATA) {
 269			wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
 270			wl1251_rx(wl);
 271		}
 272
 273		if (intr & WL1251_ACX_INTR_TX_RESULT) {
 274			wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
 275			wl1251_tx_complete(wl);
 276		}
 277
 278		if (intr & WL1251_ACX_INTR_EVENT_A) {
 279			wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
 280			wl1251_event_handle(wl, 0);
 281		}
 282
 283		if (intr & WL1251_ACX_INTR_EVENT_B) {
 284			wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
 285			wl1251_event_handle(wl, 1);
 286		}
 287
 288		if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
 289			wl1251_debug(DEBUG_IRQ,
 290				     "WL1251_ACX_INTR_INIT_COMPLETE");
 291
 292		if (--ctr == 0)
 293			break;
 294
 295		intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
 296	} while (intr);
 297
 298out_sleep:
 299	wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
 300	wl1251_ps_elp_sleep(wl);
 301
 302out:
 303	mutex_unlock(&wl->mutex);
 304}
 305
 306static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
 307		       u16 beacon_interval, u8 dtim_period)
 308{
 309	int ret;
 310
 311	ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
 312				     DEFAULT_HW_GEN_MODULATION_TYPE,
 313				     wl->tx_mgmt_frm_rate,
 314				     wl->tx_mgmt_frm_mod);
 315	if (ret < 0)
 316		goto out;
 317
 318	/*
 319	 * Join command applies filters, and if we are not associated,
 320	 * BSSID filter must be disabled for association to work.
 321	 */
 322	if (is_zero_ether_addr(wl->bssid))
 323		wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 324
 325	ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
 326			      dtim_period);
 327	if (ret < 0)
 328		goto out;
 329
 330	ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
 331	if (ret < 0)
 332		wl1251_warning("join timeout");
 333
 334out:
 335	return ret;
 336}
 337
 338static void wl1251_op_tx(struct ieee80211_hw *hw,
 339			 struct ieee80211_tx_control *control,
 340			 struct sk_buff *skb)
 341{
 342	struct wl1251 *wl = hw->priv;
 343	unsigned long flags;
 344
 345	skb_queue_tail(&wl->tx_queue, skb);
 346
 347	/*
 348	 * The chip specific setup must run before the first TX packet -
 349	 * before that, the tx_work will not be initialized!
 350	 */
 351
 352	ieee80211_queue_work(wl->hw, &wl->tx_work);
 353
 354	/*
 355	 * The workqueue is slow to process the tx_queue and we need stop
 356	 * the queue here, otherwise the queue will get too long.
 357	 */
 358	if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
 359		wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
 360
 361		spin_lock_irqsave(&wl->wl_lock, flags);
 362		ieee80211_stop_queues(wl->hw);
 363		wl->tx_queue_stopped = true;
 364		spin_unlock_irqrestore(&wl->wl_lock, flags);
 365	}
 366}
 367
 368static int wl1251_op_start(struct ieee80211_hw *hw)
 369{
 370	struct wl1251 *wl = hw->priv;
 371	struct wiphy *wiphy = hw->wiphy;
 372	int ret = 0;
 373
 374	wl1251_debug(DEBUG_MAC80211, "mac80211 start");
 375
 376	mutex_lock(&wl->mutex);
 377
 378	if (wl->state != WL1251_STATE_OFF) {
 379		wl1251_error("cannot start because not in off state: %d",
 380			     wl->state);
 381		ret = -EBUSY;
 382		goto out;
 383	}
 384
 385	ret = wl1251_chip_wakeup(wl);
 386	if (ret < 0)
 387		goto out;
 388
 389	ret = wl1251_boot(wl);
 390	if (ret < 0)
 391		goto out;
 392
 393	ret = wl1251_hw_init(wl);
 394	if (ret < 0)
 395		goto out;
 396
 397	ret = wl1251_acx_station_id(wl);
 398	if (ret < 0)
 399		goto out;
 400
 401	wl->state = WL1251_STATE_ON;
 402
 403	wl1251_info("firmware booted (%s)", wl->fw_ver);
 404
 405	/* update hw/fw version info in wiphy struct */
 406	wiphy->hw_version = wl->chip_id;
 407	strscpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
 408
 409out:
 410	if (ret < 0)
 411		wl1251_power_off(wl);
 412
 413	mutex_unlock(&wl->mutex);
 414
 415	return ret;
 416}
 417
 418static void wl1251_op_stop(struct ieee80211_hw *hw, bool suspend)
 419{
 420	struct wl1251 *wl = hw->priv;
 421
 422	wl1251_info("down");
 423
 424	wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
 425
 426	mutex_lock(&wl->mutex);
 427
 428	WARN_ON(wl->state != WL1251_STATE_ON);
 429
 430	if (wl->scanning) {
 431		struct cfg80211_scan_info info = {
 432			.aborted = true,
 433		};
 434
 435		ieee80211_scan_completed(wl->hw, &info);
 436		wl->scanning = false;
 437	}
 438
 439	wl->state = WL1251_STATE_OFF;
 440
 441	wl1251_disable_interrupts(wl);
 442
 443	mutex_unlock(&wl->mutex);
 444
 445	cancel_work_sync(&wl->irq_work);
 446	cancel_work_sync(&wl->tx_work);
 447	cancel_delayed_work_sync(&wl->elp_work);
 448
 449	mutex_lock(&wl->mutex);
 450
 451	/* let's notify MAC80211 about the remaining pending TX frames */
 452	wl1251_tx_flush(wl);
 453	wl1251_power_off(wl);
 454
 455	eth_zero_addr(wl->bssid);
 456	wl->listen_int = 1;
 457	wl->bss_type = MAX_BSS_TYPE;
 458
 459	wl->data_in_count = 0;
 460	wl->rx_counter = 0;
 461	wl->rx_handled = 0;
 462	wl->rx_current_buffer = 0;
 463	wl->rx_last_id = 0;
 464	wl->next_tx_complete = 0;
 465	wl->elp = false;
 466	wl->station_mode = STATION_ACTIVE_MODE;
 467	wl->psm_entry_retry = 0;
 468	wl->tx_queue_stopped = false;
 469	wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
 470	wl->rssi_thold = 0;
 471	wl->channel = WL1251_DEFAULT_CHANNEL;
 472	wl->monitor_present = false;
 473	wl->joined = false;
 474
 475	wl1251_debugfs_reset(wl);
 476
 477	mutex_unlock(&wl->mutex);
 478}
 479
 480static int wl1251_op_add_interface(struct ieee80211_hw *hw,
 481				   struct ieee80211_vif *vif)
 482{
 483	struct wl1251 *wl = hw->priv;
 484	int ret = 0;
 485
 486	vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
 487			     IEEE80211_VIF_SUPPORTS_UAPSD |
 488			     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
 489
 490	wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
 491		     vif->type, vif->addr);
 492
 493	mutex_lock(&wl->mutex);
 494	if (wl->vif) {
 495		ret = -EBUSY;
 496		goto out;
 497	}
 498
 499	wl->vif = vif;
 500
 501	switch (vif->type) {
 502	case NL80211_IFTYPE_STATION:
 503		wl->bss_type = BSS_TYPE_STA_BSS;
 504		break;
 505	case NL80211_IFTYPE_ADHOC:
 506		wl->bss_type = BSS_TYPE_IBSS;
 507		break;
 508	default:
 509		ret = -EOPNOTSUPP;
 510		goto out;
 511	}
 512
 513	if (!ether_addr_equal_unaligned(wl->mac_addr, vif->addr)) {
 514		memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
 515		SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
 516		ret = wl1251_acx_station_id(wl);
 517		if (ret < 0)
 518			goto out;
 519	}
 520
 521out:
 522	mutex_unlock(&wl->mutex);
 523	return ret;
 524}
 525
 526static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
 527					 struct ieee80211_vif *vif)
 528{
 529	struct wl1251 *wl = hw->priv;
 530
 531	mutex_lock(&wl->mutex);
 532	wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
 533	wl->vif = NULL;
 534	eth_zero_addr(wl->bssid);
 535	mutex_unlock(&wl->mutex);
 536}
 537
 538static int wl1251_build_null_data(struct wl1251 *wl)
 539{
 540	struct sk_buff *skb = NULL;
 541	int size;
 542	void *ptr;
 543	int ret = -ENOMEM;
 544
 545	if (wl->bss_type == BSS_TYPE_IBSS) {
 546		size = sizeof(struct wl12xx_null_data_template);
 547		ptr = NULL;
 548	} else {
 549		skb = ieee80211_nullfunc_get(wl->hw, wl->vif, -1, false);
 550		if (!skb)
 551			goto out;
 552		size = skb->len;
 553		ptr = skb->data;
 554	}
 555
 556	ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
 557
 558out:
 559	dev_kfree_skb(skb);
 560	if (ret)
 561		wl1251_warning("cmd build null data failed: %d", ret);
 562
 563	return ret;
 564}
 565
 566static int wl1251_build_qos_null_data(struct wl1251 *wl)
 567{
 568	struct ieee80211_qos_hdr template;
 569
 570	memset(&template, 0, sizeof(template));
 571
 572	memcpy(template.addr1, wl->bssid, ETH_ALEN);
 573	memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
 574	memcpy(template.addr3, wl->bssid, ETH_ALEN);
 575
 576	template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
 577					     IEEE80211_STYPE_QOS_NULLFUNC |
 578					     IEEE80211_FCTL_TODS);
 579
 580	/* FIXME: not sure what priority to use here */
 581	template.qos_ctrl = cpu_to_le16(0);
 582
 583	return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
 584				       sizeof(template));
 585}
 586
 587static bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
 588{
 589	return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
 590}
 591
 592static int wl1251_op_config(struct ieee80211_hw *hw, int radio_idx, u32 changed)
 593{
 594	struct wl1251 *wl = hw->priv;
 595	struct ieee80211_conf *conf = &hw->conf;
 596	int channel, ret = 0;
 597
 598	channel = ieee80211_frequency_to_channel(
 599			conf->chandef.chan->center_freq);
 600
 601	wl1251_debug(DEBUG_MAC80211,
 602		     "mac80211 config ch %d monitor %s psm %s power %d",
 603		     channel,
 604		     conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
 605		     conf->flags & IEEE80211_CONF_PS ? "on" : "off",
 606		     conf->power_level);
 607
 608	mutex_lock(&wl->mutex);
 609
 610	ret = wl1251_ps_elp_wakeup(wl);
 611	if (ret < 0)
 612		goto out;
 613
 614	if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
 615		u32 mode;
 616
 617		if (conf->flags & IEEE80211_CONF_MONITOR) {
 618			wl->monitor_present = true;
 619			mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
 620		} else {
 621			wl->monitor_present = false;
 622			mode = 0;
 623		}
 624
 625		ret = wl1251_acx_feature_cfg(wl, mode);
 626		if (ret < 0)
 627			goto out_sleep;
 628	}
 629
 630	if (channel != wl->channel) {
 631		wl->channel = channel;
 632
 633		/*
 634		 * Use ENABLE_RX command for channel switching when no
 635		 * interface is present (monitor mode only).
 636		 * This leaves the tx path disabled in firmware, whereas
 637		 * the usual JOIN command seems to transmit some frames
 638		 * at firmware level.
 639		 */
 640		if (wl->vif == NULL) {
 641			wl->joined = false;
 642			ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
 643		} else {
 644			ret = wl1251_join(wl, wl->bss_type, wl->channel,
 645					  wl->beacon_int, wl->dtim_period);
 646		}
 647		if (ret < 0)
 648			goto out_sleep;
 649	}
 650
 651	if (wl1251_can_do_pm(conf, wl) && !wl->psm_requested) {
 652		wl1251_debug(DEBUG_PSM, "psm enabled");
 653
 654		wl->psm_requested = true;
 655
 656		wl->dtim_period = conf->ps_dtim_period;
 657
 658		ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
 659						  wl->dtim_period);
 660
 661		/*
 662		 * mac80211 enables PSM only if we're already associated.
 663		 */
 664		ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
 665		if (ret < 0)
 666			goto out_sleep;
 667	} else if (!wl1251_can_do_pm(conf, wl) && wl->psm_requested) {
 668		wl1251_debug(DEBUG_PSM, "psm disabled");
 669
 670		wl->psm_requested = false;
 671
 672		if (wl->station_mode != STATION_ACTIVE_MODE) {
 673			ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 674			if (ret < 0)
 675				goto out_sleep;
 676		}
 677	}
 678
 679	if (changed & IEEE80211_CONF_CHANGE_IDLE && !wl->scanning) {
 680		if (conf->flags & IEEE80211_CONF_IDLE) {
 681			ret = wl1251_ps_set_mode(wl, STATION_IDLE);
 682			if (ret < 0)
 683				goto out_sleep;
 684		} else {
 685			ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
 686			if (ret < 0)
 687				goto out_sleep;
 688			ret = wl1251_join(wl, wl->bss_type, wl->channel,
 689					  wl->beacon_int, wl->dtim_period);
 690			if (ret < 0)
 691				goto out_sleep;
 692		}
 693	}
 694
 695	if (conf->power_level != wl->power_level) {
 696		ret = wl1251_acx_tx_power(wl, conf->power_level);
 697		if (ret < 0)
 698			goto out_sleep;
 699
 700		wl->power_level = conf->power_level;
 701	}
 702
 703out_sleep:
 704	wl1251_ps_elp_sleep(wl);
 705
 706out:
 707	mutex_unlock(&wl->mutex);
 708
 709	return ret;
 710}
 711
 712struct wl1251_filter_params {
 713	bool enabled;
 714	int mc_list_length;
 715	u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
 716};
 717
 718static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
 719				       struct netdev_hw_addr_list *mc_list)
 720{
 721	struct wl1251_filter_params *fp;
 722	struct netdev_hw_addr *ha;
 723	struct wl1251 *wl = hw->priv;
 724
 725	if (unlikely(wl->state == WL1251_STATE_OFF))
 726		return 0;
 727
 728	fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
 729	if (!fp) {
 730		wl1251_error("Out of memory setting filters.");
 731		return 0;
 732	}
 733
 734	/* update multicast filtering parameters */
 735	fp->mc_list_length = 0;
 736	if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
 737		fp->enabled = false;
 738	} else {
 739		fp->enabled = true;
 740		netdev_hw_addr_list_for_each(ha, mc_list) {
 741			memcpy(fp->mc_list[fp->mc_list_length],
 742					ha->addr, ETH_ALEN);
 743			fp->mc_list_length++;
 744		}
 745	}
 746
 747	return (u64)(unsigned long)fp;
 748}
 749
 750#define WL1251_SUPPORTED_FILTERS (FIF_ALLMULTI | \
 751				  FIF_FCSFAIL | \
 752				  FIF_BCN_PRBRESP_PROMISC | \
 753				  FIF_CONTROL | \
 754				  FIF_OTHER_BSS | \
 755				  FIF_PROBE_REQ)
 756
 757static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
 758				       unsigned int changed,
 759				       unsigned int *total, u64 multicast)
 760{
 761	struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
 762	struct wl1251 *wl = hw->priv;
 763	int ret;
 764
 765	wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
 766
 767	*total &= WL1251_SUPPORTED_FILTERS;
 768	changed &= WL1251_SUPPORTED_FILTERS;
 769
 770	if (changed == 0) {
 771		/* no filters which we support changed */
 772		kfree(fp);
 773		return;
 774	}
 775
 776	mutex_lock(&wl->mutex);
 777
 778	wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
 779	wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
 780
 781	if (*total & FIF_ALLMULTI)
 782		/*
 783		 * CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
 784		 * all multicast frames
 785		 */
 786		wl->rx_config &= ~CFG_MC_FILTER_EN;
 787	if (*total & FIF_FCSFAIL)
 788		wl->rx_filter |= CFG_RX_FCS_ERROR;
 789	if (*total & FIF_BCN_PRBRESP_PROMISC) {
 790		wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 791		wl->rx_config &= ~CFG_SSID_FILTER_EN;
 792	}
 793	if (*total & FIF_CONTROL)
 794		wl->rx_filter |= CFG_RX_CTL_EN;
 795	if (*total & FIF_OTHER_BSS || is_zero_ether_addr(wl->bssid))
 796		wl->rx_config &= ~CFG_BSSID_FILTER_EN;
 797	if (*total & FIF_PROBE_REQ)
 798		wl->rx_filter |= CFG_RX_PREQ_EN;
 799
 800	if (wl->state == WL1251_STATE_OFF)
 801		goto out;
 802
 803	ret = wl1251_ps_elp_wakeup(wl);
 804	if (ret < 0)
 805		goto out;
 806
 807	if (*total & FIF_ALLMULTI)
 808		ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
 809	else if (fp)
 810		ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
 811						   fp->mc_list,
 812						   fp->mc_list_length);
 813	if (ret < 0)
 814		goto out;
 815
 816	/* send filters to firmware */
 817	wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
 818
 819	wl1251_ps_elp_sleep(wl);
 820
 821out:
 822	mutex_unlock(&wl->mutex);
 823	kfree(fp);
 824}
 825
 826/* HW encryption */
 827static int wl1251_set_key_type(struct wl1251 *wl,
 828			       struct wl1251_cmd_set_keys *key,
 829			       enum set_key_cmd cmd,
 830			       struct ieee80211_key_conf *mac80211_key,
 831			       const u8 *addr)
 832{
 833	switch (mac80211_key->cipher) {
 834	case WLAN_CIPHER_SUITE_WEP40:
 835	case WLAN_CIPHER_SUITE_WEP104:
 836		if (is_broadcast_ether_addr(addr))
 837			key->key_type = KEY_WEP_DEFAULT;
 838		else
 839			key->key_type = KEY_WEP_ADDR;
 840
 841		mac80211_key->hw_key_idx = mac80211_key->keyidx;
 842		break;
 843	case WLAN_CIPHER_SUITE_TKIP:
 844		if (is_broadcast_ether_addr(addr))
 845			key->key_type = KEY_TKIP_MIC_GROUP;
 846		else
 847			key->key_type = KEY_TKIP_MIC_PAIRWISE;
 848
 849		mac80211_key->hw_key_idx = mac80211_key->keyidx;
 850		break;
 851	case WLAN_CIPHER_SUITE_CCMP:
 852		if (is_broadcast_ether_addr(addr))
 853			key->key_type = KEY_AES_GROUP;
 854		else
 855			key->key_type = KEY_AES_PAIRWISE;
 856		mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
 857		break;
 858	default:
 859		wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
 860		return -EOPNOTSUPP;
 861	}
 862
 863	return 0;
 864}
 865
 866static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 867			     struct ieee80211_vif *vif,
 868			     struct ieee80211_sta *sta,
 869			     struct ieee80211_key_conf *key)
 870{
 871	struct wl1251 *wl = hw->priv;
 872	struct wl1251_cmd_set_keys *wl_cmd;
 873	const u8 *addr;
 874	int ret;
 875
 876	static const u8 bcast_addr[ETH_ALEN] =
 877		{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 878
 879	wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
 880
 881	wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
 882	if (!wl_cmd) {
 883		ret = -ENOMEM;
 884		goto out;
 885	}
 886
 887	addr = sta ? sta->addr : bcast_addr;
 888
 889	wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
 890	wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
 891	wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
 892		     key->cipher, key->keyidx, key->keylen, key->flags);
 893	wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
 894
 895	if (is_zero_ether_addr(addr)) {
 896		/* We dont support TX only encryption */
 897		ret = -EOPNOTSUPP;
 898		goto out;
 899	}
 900
 901	mutex_lock(&wl->mutex);
 902
 903	switch (cmd) {
 904	case SET_KEY:
 905		if (wl->monitor_present) {
 906			ret = -EOPNOTSUPP;
 907			goto out_unlock;
 908		}
 909		wl_cmd->key_action = KEY_ADD_OR_REPLACE;
 910		break;
 911	case DISABLE_KEY:
 912		wl_cmd->key_action = KEY_REMOVE;
 913		break;
 914	default:
 915		wl1251_error("Unsupported key cmd 0x%x", cmd);
 916		break;
 917	}
 918
 919	ret = wl1251_ps_elp_wakeup(wl);
 920	if (ret < 0)
 921		goto out_unlock;
 922
 923	ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
 924	if (ret < 0) {
 925		wl1251_error("Set KEY type failed");
 926		goto out_sleep;
 927	}
 928
 929	if (wl_cmd->key_type != KEY_WEP_DEFAULT)
 930		memcpy(wl_cmd->addr, addr, ETH_ALEN);
 931
 932	if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
 933	    (wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
 934		/*
 935		 * We get the key in the following form:
 936		 * TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
 937		 * but the target is expecting:
 938		 * TKIP - RX MIC - TX MIC
 939		 */
 940		memcpy(wl_cmd->key, key->key, 16);
 941		memcpy(wl_cmd->key + 16, key->key + 24, 8);
 942		memcpy(wl_cmd->key + 24, key->key + 16, 8);
 943
 944	} else {
 945		memcpy(wl_cmd->key, key->key, key->keylen);
 946	}
 947	wl_cmd->key_size = key->keylen;
 948
 949	wl_cmd->id = key->keyidx;
 950	wl_cmd->ssid_profile = 0;
 951
 952	wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
 953
 954	ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
 955	if (ret < 0) {
 956		wl1251_warning("could not set keys");
 957		goto out_sleep;
 958	}
 959
 960out_sleep:
 961	wl1251_ps_elp_sleep(wl);
 962
 963out_unlock:
 964	mutex_unlock(&wl->mutex);
 965
 966out:
 967	kfree(wl_cmd);
 968
 969	return ret;
 970}
 971
 972static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
 973			     struct ieee80211_vif *vif,
 974			     struct ieee80211_scan_request *hw_req)
 975{
 976	struct cfg80211_scan_request *req = &hw_req->req;
 977	struct wl1251 *wl = hw->priv;
 978	struct sk_buff *skb;
 979	size_t ssid_len = 0;
 980	u8 *ssid = NULL;
 981	int ret;
 982
 983	wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
 984
 985	if (req->n_ssids) {
 986		ssid = req->ssids[0].ssid;
 987		ssid_len = req->ssids[0].ssid_len;
 988	}
 989
 990	mutex_lock(&wl->mutex);
 991
 992	if (wl->scanning) {
 993		wl1251_debug(DEBUG_SCAN, "scan already in progress");
 994		ret = -EINVAL;
 995		goto out;
 996	}
 997
 998	ret = wl1251_ps_elp_wakeup(wl);
 999	if (ret < 0)
1000		goto out;
1001
1002	if (hw->conf.flags & IEEE80211_CONF_IDLE) {
1003		ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
1004		if (ret < 0)
1005			goto out_sleep;
1006		ret = wl1251_join(wl, wl->bss_type, wl->channel,
1007				  wl->beacon_int, wl->dtim_period);
1008		if (ret < 0)
1009			goto out_sleep;
1010	}
1011
1012	skb = ieee80211_probereq_get(wl->hw, wl->vif->addr, ssid, ssid_len,
1013				     req->ie_len);
1014	if (!skb) {
1015		ret = -ENOMEM;
1016		goto out_idle;
1017	}
1018	if (req->ie_len)
1019		skb_put_data(skb, req->ie, req->ie_len);
1020
1021	ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
1022				      skb->len);
1023	dev_kfree_skb(skb);
1024	if (ret < 0)
1025		goto out_idle;
1026
1027	ret = wl1251_cmd_trigger_scan_to(wl, 0);
1028	if (ret < 0)
1029		goto out_idle;
1030
1031	wl->scanning = true;
1032
1033	ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
1034			      req->n_channels, WL1251_SCAN_NUM_PROBES);
1035	if (ret < 0) {
1036		wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
1037		wl->scanning = false;
1038		goto out_idle;
1039	}
1040	goto out_sleep;
1041
1042out_idle:
1043	if (hw->conf.flags & IEEE80211_CONF_IDLE)
1044		ret = wl1251_ps_set_mode(wl, STATION_IDLE);
1045out_sleep:
1046	wl1251_ps_elp_sleep(wl);
1047
1048out:
1049	mutex_unlock(&wl->mutex);
1050
1051	return ret;
1052}
1053
1054static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, int radio_idx,
1055				       u32 value)
1056{
1057	struct wl1251 *wl = hw->priv;
1058	int ret;
1059
1060	mutex_lock(&wl->mutex);
1061
1062	ret = wl1251_ps_elp_wakeup(wl);
1063	if (ret < 0)
1064		goto out;
1065
1066	ret = wl1251_acx_rts_threshold(wl, (u16) value);
1067	if (ret < 0)
1068		wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
1069
1070	wl1251_ps_elp_sleep(wl);
1071
1072out:
1073	mutex_unlock(&wl->mutex);
1074
1075	return ret;
1076}
1077
1078static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
1079				       struct ieee80211_vif *vif,
1080				       struct ieee80211_bss_conf *bss_conf,
1081				       u64 changed)
1082{
1083	struct wl1251 *wl = hw->priv;
1084	struct sk_buff *beacon, *skb;
1085	bool enable;
1086	int ret;
1087
1088	wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
1089
1090	mutex_lock(&wl->mutex);
1091
1092	ret = wl1251_ps_elp_wakeup(wl);
1093	if (ret < 0)
1094		goto out;
1095
1096	if (changed & BSS_CHANGED_CQM) {
1097		ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
1098					  WL1251_DEFAULT_LOW_RSSI_WEIGHT,
1099					  WL1251_DEFAULT_LOW_RSSI_DEPTH,
1100					  WL1251_ACX_LOW_RSSI_TYPE_EDGE);
1101		if (ret < 0)
1102			goto out;
1103		wl->rssi_thold = bss_conf->cqm_rssi_thold;
1104	}
1105
1106	if ((changed & BSS_CHANGED_BSSID) &&
1107	    memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
1108		memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
1109
1110		if (!is_zero_ether_addr(wl->bssid)) {
1111			ret = wl1251_build_null_data(wl);
1112			if (ret < 0)
1113				goto out_sleep;
1114
1115			ret = wl1251_build_qos_null_data(wl);
1116			if (ret < 0)
1117				goto out_sleep;
1118
1119			ret = wl1251_join(wl, wl->bss_type, wl->channel,
1120					  wl->beacon_int, wl->dtim_period);
1121			if (ret < 0)
1122				goto out_sleep;
1123		}
1124	}
1125
1126	if (changed & BSS_CHANGED_ASSOC) {
1127		if (vif->cfg.assoc) {
1128			wl->beacon_int = bss_conf->beacon_int;
1129
1130			skb = ieee80211_pspoll_get(wl->hw, wl->vif);
1131			if (!skb)
1132				goto out_sleep;
1133
1134			ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
1135						      skb->data,
1136						      skb->len);
1137			dev_kfree_skb(skb);
1138			if (ret < 0)
1139				goto out_sleep;
1140
1141			ret = wl1251_acx_aid(wl, vif->cfg.aid);
1142			if (ret < 0)
1143				goto out_sleep;
1144		} else {
1145			/* use defaults when not associated */
1146			wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1147			wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1148		}
1149	}
1150	if (changed & BSS_CHANGED_ERP_SLOT) {
1151		if (bss_conf->use_short_slot)
1152			ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
1153		else
1154			ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
1155		if (ret < 0) {
1156			wl1251_warning("Set slot time failed %d", ret);
1157			goto out_sleep;
1158		}
1159	}
1160
1161	if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1162		if (bss_conf->use_short_preamble)
1163			wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
1164		else
1165			wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
1166	}
1167
1168	if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1169		if (bss_conf->use_cts_prot)
1170			ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
1171		else
1172			ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
1173		if (ret < 0) {
1174			wl1251_warning("Set ctsprotect failed %d", ret);
1175			goto out_sleep;
1176		}
1177	}
1178
1179	if (changed & BSS_CHANGED_ARP_FILTER) {
1180		__be32 addr = vif->cfg.arp_addr_list[0];
1181		WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
1182
1183		enable = vif->cfg.arp_addr_cnt == 1 && vif->cfg.assoc;
1184		ret = wl1251_acx_arp_ip_filter(wl, enable, addr);
1185		if (ret < 0)
1186			goto out_sleep;
1187	}
1188
1189	if (changed & BSS_CHANGED_BEACON) {
1190		beacon = ieee80211_beacon_get(hw, vif, 0);
1191		if (!beacon)
1192			goto out_sleep;
1193
1194		ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
1195					      beacon->len);
1196
1197		if (ret < 0) {
1198			dev_kfree_skb(beacon);
1199			goto out_sleep;
1200		}
1201
1202		ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
1203					      beacon->len);
1204
1205		dev_kfree_skb(beacon);
1206
1207		if (ret < 0)
1208			goto out_sleep;
1209
1210		ret = wl1251_join(wl, wl->bss_type, wl->channel,
1211				  wl->beacon_int, wl->dtim_period);
1212
1213		if (ret < 0)
1214			goto out_sleep;
1215	}
1216
1217out_sleep:
1218	wl1251_ps_elp_sleep(wl);
1219
1220out:
1221	mutex_unlock(&wl->mutex);
1222}
1223
1224
1225/* can't be const, mac80211 writes to this */
1226static struct ieee80211_rate wl1251_rates[] = {
1227	{ .bitrate = 10,
1228	  .hw_value = 0x1,
1229	  .hw_value_short = 0x1, },
1230	{ .bitrate = 20,
1231	  .hw_value = 0x2,
1232	  .hw_value_short = 0x2,
1233	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1234	{ .bitrate = 55,
1235	  .hw_value = 0x4,
1236	  .hw_value_short = 0x4,
1237	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1238	{ .bitrate = 110,
1239	  .hw_value = 0x20,
1240	  .hw_value_short = 0x20,
1241	  .flags = IEEE80211_RATE_SHORT_PREAMBLE },
1242	{ .bitrate = 60,
1243	  .hw_value = 0x8,
1244	  .hw_value_short = 0x8, },
1245	{ .bitrate = 90,
1246	  .hw_value = 0x10,
1247	  .hw_value_short = 0x10, },
1248	{ .bitrate = 120,
1249	  .hw_value = 0x40,
1250	  .hw_value_short = 0x40, },
1251	{ .bitrate = 180,
1252	  .hw_value = 0x80,
1253	  .hw_value_short = 0x80, },
1254	{ .bitrate = 240,
1255	  .hw_value = 0x200,
1256	  .hw_value_short = 0x200, },
1257	{ .bitrate = 360,
1258	 .hw_value = 0x400,
1259	 .hw_value_short = 0x400, },
1260	{ .bitrate = 480,
1261	  .hw_value = 0x800,
1262	  .hw_value_short = 0x800, },
1263	{ .bitrate = 540,
1264	  .hw_value = 0x1000,
1265	  .hw_value_short = 0x1000, },
1266};
1267
1268/* can't be const, mac80211 writes to this */
1269static struct ieee80211_channel wl1251_channels[] = {
1270	{ .hw_value = 1, .center_freq = 2412},
1271	{ .hw_value = 2, .center_freq = 2417},
1272	{ .hw_value = 3, .center_freq = 2422},
1273	{ .hw_value = 4, .center_freq = 2427},
1274	{ .hw_value = 5, .center_freq = 2432},
1275	{ .hw_value = 6, .center_freq = 2437},
1276	{ .hw_value = 7, .center_freq = 2442},
1277	{ .hw_value = 8, .center_freq = 2447},
1278	{ .hw_value = 9, .center_freq = 2452},
1279	{ .hw_value = 10, .center_freq = 2457},
1280	{ .hw_value = 11, .center_freq = 2462},
1281	{ .hw_value = 12, .center_freq = 2467},
1282	{ .hw_value = 13, .center_freq = 2472},
1283};
1284
1285static int wl1251_op_conf_tx(struct ieee80211_hw *hw,
1286			     struct ieee80211_vif *vif,
1287			     unsigned int link_id, u16 queue,
1288			     const struct ieee80211_tx_queue_params *params)
1289{
1290	enum wl1251_acx_ps_scheme ps_scheme;
1291	struct wl1251 *wl = hw->priv;
1292	int ret;
1293
1294	mutex_lock(&wl->mutex);
1295
1296	wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
1297
1298	ret = wl1251_ps_elp_wakeup(wl);
1299	if (ret < 0)
1300		goto out;
1301
1302	/* mac80211 uses units of 32 usec */
1303	ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
1304				params->cw_min, params->cw_max,
1305				params->aifs, params->txop * 32);
1306	if (ret < 0)
1307		goto out_sleep;
1308
1309	if (params->uapsd)
1310		ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
1311	else
1312		ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
1313
1314	ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
1315				 CHANNEL_TYPE_EDCF,
1316				 wl1251_tx_get_queue(queue), ps_scheme,
1317				 WL1251_ACX_ACK_POLICY_LEGACY);
1318	if (ret < 0)
1319		goto out_sleep;
1320
1321out_sleep:
1322	wl1251_ps_elp_sleep(wl);
1323
1324out:
1325	mutex_unlock(&wl->mutex);
1326
1327	return ret;
1328}
1329
1330static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
1331				struct survey_info *survey)
1332{
1333	struct wl1251 *wl = hw->priv;
1334	struct ieee80211_conf *conf = &hw->conf;
1335 
1336	if (idx != 0)
1337		return -ENOENT;
1338 
1339	survey->channel = conf->chandef.chan;
1340	survey->filled = SURVEY_INFO_NOISE_DBM;
1341	survey->noise = wl->noise;
1342 
1343	return 0;
1344}
1345
1346/* can't be const, mac80211 writes to this */
1347static struct ieee80211_supported_band wl1251_band_2ghz = {
1348	.channels = wl1251_channels,
1349	.n_channels = ARRAY_SIZE(wl1251_channels),
1350	.bitrates = wl1251_rates,
1351	.n_bitrates = ARRAY_SIZE(wl1251_rates),
1352};
1353
1354static const struct ieee80211_ops wl1251_ops = {
1355	.add_chanctx = ieee80211_emulate_add_chanctx,
1356	.remove_chanctx = ieee80211_emulate_remove_chanctx,
1357	.change_chanctx = ieee80211_emulate_change_chanctx,
1358	.switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
1359	.start = wl1251_op_start,
1360	.stop = wl1251_op_stop,
1361	.add_interface = wl1251_op_add_interface,
1362	.remove_interface = wl1251_op_remove_interface,
1363	.config = wl1251_op_config,
1364	.prepare_multicast = wl1251_op_prepare_multicast,
1365	.configure_filter = wl1251_op_configure_filter,
1366	.tx = wl1251_op_tx,
1367	.wake_tx_queue = ieee80211_handle_wake_tx_queue,
1368	.set_key = wl1251_op_set_key,
1369	.hw_scan = wl1251_op_hw_scan,
1370	.bss_info_changed = wl1251_op_bss_info_changed,
1371	.set_rts_threshold = wl1251_op_set_rts_threshold,
1372	.conf_tx = wl1251_op_conf_tx,
1373	.get_survey = wl1251_op_get_survey,
1374};
1375
1376static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
1377{
1378	unsigned long timeout;
1379
1380	wl1251_reg_write32(wl, EE_ADDR, offset);
1381	wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
1382
1383	/* EE_CTL_READ clears when data is ready */
1384	timeout = jiffies + msecs_to_jiffies(100);
1385	while (1) {
1386		if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
1387			break;
1388
1389		if (time_after(jiffies, timeout))
1390			return -ETIMEDOUT;
1391
1392		msleep(1);
1393	}
1394
1395	*data = wl1251_reg_read32(wl, EE_DATA);
1396	return 0;
1397}
1398
1399static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
1400			      u8 *data, size_t len)
1401{
1402	size_t i;
1403	int ret;
1404
1405	wl1251_reg_write32(wl, EE_START, 0);
1406
1407	for (i = 0; i < len; i++) {
1408		ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
1409		if (ret < 0)
1410			return ret;
1411	}
1412
1413	return 0;
1414}
1415
1416static int wl1251_read_eeprom_mac(struct wl1251 *wl)
1417{
1418	u8 mac[ETH_ALEN];
1419	int i, ret;
1420
1421	wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
1422
1423	ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
1424	if (ret < 0) {
1425		wl1251_warning("failed to read MAC address from EEPROM");
1426		return ret;
1427	}
1428
1429	/* MAC is stored in reverse order */
1430	for (i = 0; i < ETH_ALEN; i++)
1431		wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
1432
1433	return 0;
1434}
1435
1436#define NVS_OFF_MAC_LEN 0x19
1437#define NVS_OFF_MAC_ADDR_LO 0x1a
1438#define NVS_OFF_MAC_ADDR_HI 0x1b
1439#define NVS_OFF_MAC_DATA 0x1c
1440
1441static int wl1251_check_nvs_mac(struct wl1251 *wl)
1442{
1443	if (wl->nvs_len < 0x24)
1444		return -ENODATA;
1445
1446	/* length is 2 and data address is 0x546c (ANDed with 0xfffe) */
1447	if (wl->nvs[NVS_OFF_MAC_LEN] != 2 ||
1448	    wl->nvs[NVS_OFF_MAC_ADDR_LO] != 0x6d ||
1449	    wl->nvs[NVS_OFF_MAC_ADDR_HI] != 0x54)
1450		return -EINVAL;
1451
1452	return 0;
1453}
1454
1455static int wl1251_read_nvs_mac(struct wl1251 *wl)
1456{
1457	u8 mac[ETH_ALEN];
1458	int i, ret;
1459
1460	ret = wl1251_check_nvs_mac(wl);
1461	if (ret)
1462		return ret;
1463
1464	/* MAC is stored in reverse order */
1465	for (i = 0; i < ETH_ALEN; i++)
1466		mac[i] = wl->nvs[NVS_OFF_MAC_DATA + ETH_ALEN - i - 1];
1467
1468	/* 00:00:20:07:03:09 is in example file wl1251-nvs.bin, so invalid */
1469	if (ether_addr_equal_unaligned(mac, "\x00\x00\x20\x07\x03\x09"))
1470		return -EINVAL;
1471
1472	memcpy(wl->mac_addr, mac, ETH_ALEN);
1473	return 0;
1474}
1475
1476static int wl1251_write_nvs_mac(struct wl1251 *wl)
1477{
1478	int i, ret;
1479
1480	ret = wl1251_check_nvs_mac(wl);
1481	if (ret)
1482		return ret;
1483
1484	/* MAC is stored in reverse order */
1485	for (i = 0; i < ETH_ALEN; i++)
1486		wl->nvs[NVS_OFF_MAC_DATA + i] = wl->mac_addr[ETH_ALEN - i - 1];
1487
1488	return 0;
1489}
1490
1491static int wl1251_register_hw(struct wl1251 *wl)
1492{
1493	int ret;
1494
1495	if (wl->mac80211_registered)
1496		return 0;
1497
1498	SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
1499
1500	ret = ieee80211_register_hw(wl->hw);
1501	if (ret < 0) {
1502		wl1251_error("unable to register mac80211 hw: %d", ret);
1503		return ret;
1504	}
1505
1506	wl->mac80211_registered = true;
1507
1508	wl1251_notice("loaded");
1509
1510	return 0;
1511}
1512
1513int wl1251_init_ieee80211(struct wl1251 *wl)
1514{
1515	int ret;
1516
1517	/* The tx descriptor buffer and the TKIP space */
1518	wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
1519		+ WL1251_TKIP_IV_SPACE;
1520
1521	/* unit us */
1522	/* FIXME: find a proper value */
1523
1524	ieee80211_hw_set(wl->hw, SIGNAL_DBM);
1525	ieee80211_hw_set(wl->hw, SUPPORTS_PS);
1526
1527	wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1528					 BIT(NL80211_IFTYPE_ADHOC);
1529	wl->hw->wiphy->max_scan_ssids = 1;
1530
1531	/* We set max_scan_ie_len to a random value to make wpa_supplicant scans not
1532	 * fail, as the driver will the ignore the extra passed IEs anyway
1533	 */
1534	wl->hw->wiphy->max_scan_ie_len = 512;
1535
1536	wl->hw->wiphy->bands[NL80211_BAND_2GHZ] = &wl1251_band_2ghz;
1537
1538	wl->hw->queues = 4;
1539
1540	if (wl->nvs == NULL && !wl->use_eeprom) {
1541		ret = wl1251_fetch_nvs(wl);
1542		if (ret < 0)
1543			goto out;
1544	}
1545
1546	if (wl->use_eeprom)
1547		ret = wl1251_read_eeprom_mac(wl);
1548	else
1549		ret = wl1251_read_nvs_mac(wl);
1550
1551	if (ret == 0 && !is_valid_ether_addr(wl->mac_addr))
1552		ret = -EINVAL;
1553
1554	if (ret < 0) {
1555		/*
1556		 * In case our MAC address is not correctly set,
1557		 * we use a random but Nokia MAC.
1558		 */
1559		static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
1560		memcpy(wl->mac_addr, nokia_oui, 3);
1561		get_random_bytes(wl->mac_addr + 3, 3);
1562		if (!wl->use_eeprom)
1563			wl1251_write_nvs_mac(wl);
1564		wl1251_warning("MAC address in eeprom or nvs data is not valid");
1565		wl1251_warning("Setting random MAC address: %pM", wl->mac_addr);
1566	}
1567
1568	ret = wl1251_register_hw(wl);
1569	if (ret)
1570		goto out;
1571
1572	wl1251_debugfs_init(wl);
1573	wl1251_notice("initialized");
1574
1575	ret = 0;
1576
1577out:
1578	return ret;
1579}
1580EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
1581
1582struct ieee80211_hw *wl1251_alloc_hw(void)
1583{
1584	struct ieee80211_hw *hw;
1585	struct wl1251 *wl;
1586	int i;
1587
1588	hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
1589	if (!hw) {
1590		wl1251_error("could not alloc ieee80211_hw");
1591		return ERR_PTR(-ENOMEM);
1592	}
1593
1594	wl = hw->priv;
1595	memset(wl, 0, sizeof(*wl));
1596
1597	wl->hw = hw;
1598
1599	wl->data_in_count = 0;
1600
1601	skb_queue_head_init(&wl->tx_queue);
1602
1603	INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
1604	wl->channel = WL1251_DEFAULT_CHANNEL;
1605	wl->monitor_present = false;
1606	wl->joined = false;
1607	wl->scanning = false;
1608	wl->bss_type = MAX_BSS_TYPE;
1609	wl->default_key = 0;
1610	wl->listen_int = 1;
1611	wl->rx_counter = 0;
1612	wl->rx_handled = 0;
1613	wl->rx_current_buffer = 0;
1614	wl->rx_last_id = 0;
1615	wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
1616	wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
1617	wl->elp = false;
1618	wl->station_mode = STATION_ACTIVE_MODE;
1619	wl->psm_requested = false;
1620	wl->psm_entry_retry = 0;
1621	wl->tx_queue_stopped = false;
1622	wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
1623	wl->rssi_thold = 0;
1624	wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
1625	wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
1626	wl->vif = NULL;
1627
1628	for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
1629		wl->tx_frames[i] = NULL;
1630
1631	wl->next_tx_complete = 0;
1632
1633	INIT_WORK(&wl->irq_work, wl1251_irq_work);
1634	INIT_WORK(&wl->tx_work, wl1251_tx_work);
1635
1636	wl->state = WL1251_STATE_OFF;
1637	mutex_init(&wl->mutex);
1638	spin_lock_init(&wl->wl_lock);
1639
1640	wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
1641	wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
1642
1643	wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
1644	if (!wl->rx_descriptor) {
1645		wl1251_error("could not allocate memory for rx descriptor");
1646		ieee80211_free_hw(hw);
1647		return ERR_PTR(-ENOMEM);
1648	}
1649
1650	return hw;
1651}
1652EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
1653
1654int wl1251_free_hw(struct wl1251 *wl)
1655{
1656	ieee80211_unregister_hw(wl->hw);
1657
1658	wl1251_debugfs_exit(wl);
1659
1660	kfree(wl->target_mem_map);
1661	kfree(wl->data_path);
1662	vfree(wl->fw);
1663	wl->fw = NULL;
1664	kfree(wl->nvs);
1665	wl->nvs = NULL;
1666
1667	kfree(wl->rx_descriptor);
1668	wl->rx_descriptor = NULL;
1669
1670	ieee80211_free_hw(wl->hw);
1671
1672	return 0;
1673}
1674EXPORT_SYMBOL_GPL(wl1251_free_hw);
1675
1676MODULE_DESCRIPTION("TI wl1251 Wireless LAN Driver Core");
1677MODULE_LICENSE("GPL");
1678MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
1679MODULE_FIRMWARE(WL1251_FW_NAME);
1680MODULE_FIRMWARE(WL1251_NVS_NAME);