1/*
   2 * This file contains the handling of command.
   3 * It prepares command and sends it to firmware when it is ready.
   4 */
   5
   6#include <linux/hardirq.h>
   7#include <linux/kfifo.h>
   8#include <linux/sched.h>
   9#include <linux/slab.h>
  10#include <linux/if_arp.h>
  11#include <linux/export.h>
  12
  13#include "decl.h"
  14#include "cfg.h"
  15#include "cmd.h"
  16
  17#define CAL_NF(nf)		((s32)(-(s32)(nf)))
  18#define CAL_RSSI(snr, nf)	((s32)((s32)(snr) + CAL_NF(nf)))
  19
  20/**
  21 * lbs_cmd_copyback - Simple callback that copies response back into command
  22 *
  23 * @priv:	A pointer to &struct lbs_private structure
  24 * @extra:	A pointer to the original command structure for which
  25 *		'resp' is a response
  26 * @resp:	A pointer to the command response
  27 *
  28 * returns:	0 on success, error on failure
  29 */
  30int lbs_cmd_copyback(struct lbs_private *priv, unsigned long extra,
  31		     struct cmd_header *resp)
  32{
  33	struct cmd_header *buf = (void *)extra;
  34	uint16_t copy_len;
  35
  36	copy_len = min(le16_to_cpu(buf->size), le16_to_cpu(resp->size));
  37	memcpy(buf, resp, copy_len);
  38	return 0;
  39}
  40EXPORT_SYMBOL_GPL(lbs_cmd_copyback);
  41
  42/**
  43 *  lbs_cmd_async_callback - Simple callback that ignores the result.
  44 *  Use this if you just want to send a command to the hardware, but don't
  45 *  care for the result.
  46 *
  47 *  @priv:	ignored
  48 *  @extra:	ignored
  49 *  @resp:	ignored
  50 *
  51 *  returns:	0 for success
  52 */
  53static int lbs_cmd_async_callback(struct lbs_private *priv, unsigned long extra,
  54		     struct cmd_header *resp)
  55{
  56	return 0;
  57}
  58
  59
  60/**
  61 *  is_command_allowed_in_ps - tests if a command is allowed in Power Save mode
  62 *
  63 *  @cmd:	the command ID
  64 *
  65 *  returns:	1 if allowed, 0 if not allowed
  66 */
  67static u8 is_command_allowed_in_ps(u16 cmd)
  68{
  69	switch (cmd) {
  70	case CMD_802_11_RSSI:
  71		return 1;
  72	case CMD_802_11_HOST_SLEEP_CFG:
  73		return 1;
  74	default:
  75		break;
  76	}
  77	return 0;
  78}
  79
  80/**
  81 *  lbs_update_hw_spec - Updates the hardware details like MAC address
  82 *  and regulatory region
  83 *
  84 *  @priv:	A pointer to &struct lbs_private structure
  85 *
  86 *  returns:	0 on success, error on failure
  87 */
  88int lbs_update_hw_spec(struct lbs_private *priv)
  89{
  90	struct cmd_ds_get_hw_spec cmd;
  91	int ret = -1;
  92	u32 i;
  93
  94	memset(&cmd, 0, sizeof(cmd));
  95	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
  96	memcpy(cmd.permanentaddr, priv->current_addr, ETH_ALEN);
  97	ret = lbs_cmd_with_response(priv, CMD_GET_HW_SPEC, &cmd);
  98	if (ret)
  99		goto out;
 100
 101	priv->fwcapinfo = le32_to_cpu(cmd.fwcapinfo);
 102
 103	/* The firmware release is in an interesting format: the patch
 104	 * level is in the most significant nibble ... so fix that: */
 105	priv->fwrelease = le32_to_cpu(cmd.fwrelease);
 106	priv->fwrelease = (priv->fwrelease << 8) |
 107		(priv->fwrelease >> 24 & 0xff);
 108
 109	/* Some firmware capabilities:
 110	 * CF card    firmware 5.0.16p0:   cap 0x00000303
 111	 * USB dongle firmware 5.110.17p2: cap 0x00000303
 112	 */
 113	netdev_info(priv->dev, "%pM, fw %u.%u.%up%u, cap 0x%08x\n",
 114		cmd.permanentaddr,
 115		priv->fwrelease >> 24 & 0xff,
 116		priv->fwrelease >> 16 & 0xff,
 117		priv->fwrelease >>  8 & 0xff,
 118		priv->fwrelease       & 0xff,
 119		priv->fwcapinfo);
 120	lbs_deb_cmd("GET_HW_SPEC: hardware interface 0x%x, hardware spec 0x%04x\n",
 121		    cmd.hwifversion, cmd.version);
 122
 123	/* Clamp region code to 8-bit since FW spec indicates that it should
 124	 * only ever be 8-bit, even though the field size is 16-bit.  Some firmware
 125	 * returns non-zero high 8 bits here.
 126	 *
 127	 * Firmware version 4.0.102 used in CF8381 has region code shifted.  We
 128	 * need to check for this problem and handle it properly.
 129	 */
 130	if (MRVL_FW_MAJOR_REV(priv->fwrelease) == MRVL_FW_V4)
 131		priv->regioncode = (le16_to_cpu(cmd.regioncode) >> 8) & 0xFF;
 132	else
 133		priv->regioncode = le16_to_cpu(cmd.regioncode) & 0xFF;
 134
 135	for (i = 0; i < MRVDRV_MAX_REGION_CODE; i++) {
 136		/* use the region code to search for the index */
 137		if (priv->regioncode == lbs_region_code_to_index[i])
 138			break;
 139	}
 140
 141	/* if it's unidentified region code, use the default (USA) */
 142	if (i >= MRVDRV_MAX_REGION_CODE) {
 143		priv->regioncode = 0x10;
 144		netdev_info(priv->dev,
 145			    "unidentified region code; using the default (USA)\n");
 146	}
 147
 148	if (priv->current_addr[0] == 0xff)
 149		memmove(priv->current_addr, cmd.permanentaddr, ETH_ALEN);
 150
 151	if (!priv->copied_hwaddr) {
 152		memcpy(priv->dev->dev_addr, priv->current_addr, ETH_ALEN);
 153		if (priv->mesh_dev)
 154			memcpy(priv->mesh_dev->dev_addr,
 155				priv->current_addr, ETH_ALEN);
 156		priv->copied_hwaddr = 1;
 157	}
 158
 159out:
 160	return ret;
 161}
 162
 163static int lbs_ret_host_sleep_cfg(struct lbs_private *priv, unsigned long dummy,
 164			struct cmd_header *resp)
 165{
 166	if (priv->is_host_sleep_activated) {
 167		priv->is_host_sleep_configured = 0;
 168		if (priv->psstate == PS_STATE_FULL_POWER) {
 169			priv->is_host_sleep_activated = 0;
 170			wake_up_interruptible(&priv->host_sleep_q);
 171		}
 172	} else {
 173		priv->is_host_sleep_configured = 1;
 174	}
 175
 176	return 0;
 177}
 178
 179int lbs_host_sleep_cfg(struct lbs_private *priv, uint32_t criteria,
 180		struct wol_config *p_wol_config)
 181{
 182	struct cmd_ds_host_sleep cmd_config;
 183	int ret;
 184
 185	/*
 186	 * Certain firmware versions do not support EHS_REMOVE_WAKEUP command
 187	 * and the card will return a failure.  Since we need to be
 188	 * able to reset the mask, in those cases we set a 0 mask instead.
 189	 */
 190	if (criteria == EHS_REMOVE_WAKEUP && !priv->ehs_remove_supported)
 191		criteria = 0;
 192
 193	cmd_config.hdr.size = cpu_to_le16(sizeof(cmd_config));
 194	cmd_config.criteria = cpu_to_le32(criteria);
 195	cmd_config.gpio = priv->wol_gpio;
 196	cmd_config.gap = priv->wol_gap;
 197
 198	if (p_wol_config != NULL)
 199		memcpy((uint8_t *)&cmd_config.wol_conf, (uint8_t *)p_wol_config,
 200				sizeof(struct wol_config));
 201	else
 202		cmd_config.wol_conf.action = CMD_ACT_ACTION_NONE;
 203
 204	ret = __lbs_cmd(priv, CMD_802_11_HOST_SLEEP_CFG, &cmd_config.hdr,
 205			le16_to_cpu(cmd_config.hdr.size),
 206			lbs_ret_host_sleep_cfg, 0);
 207	if (!ret) {
 208		if (p_wol_config)
 209			memcpy((uint8_t *) p_wol_config,
 210					(uint8_t *)&cmd_config.wol_conf,
 211					sizeof(struct wol_config));
 212	} else {
 213		netdev_info(priv->dev, "HOST_SLEEP_CFG failed %d\n", ret);
 214	}
 215
 216	return ret;
 217}
 218EXPORT_SYMBOL_GPL(lbs_host_sleep_cfg);
 219
 220/**
 221 *  lbs_set_ps_mode - Sets the Power Save mode
 222 *
 223 *  @priv:	A pointer to &struct lbs_private structure
 224 *  @cmd_action: The Power Save operation (PS_MODE_ACTION_ENTER_PS or
 225 *                         PS_MODE_ACTION_EXIT_PS)
 226 *  @block:	Whether to block on a response or not
 227 *
 228 *  returns:	0 on success, error on failure
 229 */
 230int lbs_set_ps_mode(struct lbs_private *priv, u16 cmd_action, bool block)
 231{
 232	struct cmd_ds_802_11_ps_mode cmd;
 233	int ret = 0;
 234
 235	memset(&cmd, 0, sizeof(cmd));
 236	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 237	cmd.action = cpu_to_le16(cmd_action);
 238
 239	if (cmd_action == PS_MODE_ACTION_ENTER_PS) {
 240		lbs_deb_cmd("PS_MODE: action ENTER_PS\n");
 241		cmd.multipledtim = cpu_to_le16(1);  /* Default DTIM multiple */
 242	} else if (cmd_action == PS_MODE_ACTION_EXIT_PS) {
 243		lbs_deb_cmd("PS_MODE: action EXIT_PS\n");
 244	} else {
 245		/* We don't handle CONFIRM_SLEEP here because it needs to
 246		 * be fastpathed to the firmware.
 247		 */
 248		lbs_deb_cmd("PS_MODE: unknown action 0x%X\n", cmd_action);
 249		ret = -EOPNOTSUPP;
 250		goto out;
 251	}
 252
 253	if (block)
 254		ret = lbs_cmd_with_response(priv, CMD_802_11_PS_MODE, &cmd);
 255	else
 256		lbs_cmd_async(priv, CMD_802_11_PS_MODE, &cmd.hdr, sizeof (cmd));
 257
 258out:
 259	return ret;
 260}
 261
 262int lbs_cmd_802_11_sleep_params(struct lbs_private *priv, uint16_t cmd_action,
 263				struct sleep_params *sp)
 264{
 265	struct cmd_ds_802_11_sleep_params cmd;
 266	int ret;
 267
 268	if (cmd_action == CMD_ACT_GET) {
 269		memset(&cmd, 0, sizeof(cmd));
 270	} else {
 271		cmd.error = cpu_to_le16(sp->sp_error);
 272		cmd.offset = cpu_to_le16(sp->sp_offset);
 273		cmd.stabletime = cpu_to_le16(sp->sp_stabletime);
 274		cmd.calcontrol = sp->sp_calcontrol;
 275		cmd.externalsleepclk = sp->sp_extsleepclk;
 276		cmd.reserved = cpu_to_le16(sp->sp_reserved);
 277	}
 278	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 279	cmd.action = cpu_to_le16(cmd_action);
 280
 281	ret = lbs_cmd_with_response(priv, CMD_802_11_SLEEP_PARAMS, &cmd);
 282
 283	if (!ret) {
 284		lbs_deb_cmd("error 0x%x, offset 0x%x, stabletime 0x%x, "
 285			    "calcontrol 0x%x extsleepclk 0x%x\n",
 286			    le16_to_cpu(cmd.error), le16_to_cpu(cmd.offset),
 287			    le16_to_cpu(cmd.stabletime), cmd.calcontrol,
 288			    cmd.externalsleepclk);
 289
 290		sp->sp_error = le16_to_cpu(cmd.error);
 291		sp->sp_offset = le16_to_cpu(cmd.offset);
 292		sp->sp_stabletime = le16_to_cpu(cmd.stabletime);
 293		sp->sp_calcontrol = cmd.calcontrol;
 294		sp->sp_extsleepclk = cmd.externalsleepclk;
 295		sp->sp_reserved = le16_to_cpu(cmd.reserved);
 296	}
 297
 298	return ret;
 299}
 300
 301static int lbs_wait_for_ds_awake(struct lbs_private *priv)
 302{
 303	int ret = 0;
 304
 305	if (priv->is_deep_sleep) {
 306		if (!wait_event_interruptible_timeout(priv->ds_awake_q,
 307					!priv->is_deep_sleep, (10 * HZ))) {
 308			netdev_err(priv->dev, "ds_awake_q: timer expired\n");
 309			ret = -1;
 310		}
 311	}
 312
 313	return ret;
 314}
 315
 316int lbs_set_deep_sleep(struct lbs_private *priv, int deep_sleep)
 317{
 318	int ret =  0;
 319
 320	if (deep_sleep) {
 321		if (priv->is_deep_sleep != 1) {
 322			lbs_deb_cmd("deep sleep: sleep\n");
 323			BUG_ON(!priv->enter_deep_sleep);
 324			ret = priv->enter_deep_sleep(priv);
 325			if (!ret) {
 326				netif_stop_queue(priv->dev);
 327				netif_carrier_off(priv->dev);
 328			}
 329		} else {
 330			netdev_err(priv->dev, "deep sleep: already enabled\n");
 331		}
 332	} else {
 333		if (priv->is_deep_sleep) {
 334			lbs_deb_cmd("deep sleep: wakeup\n");
 335			BUG_ON(!priv->exit_deep_sleep);
 336			ret = priv->exit_deep_sleep(priv);
 337			if (!ret) {
 338				ret = lbs_wait_for_ds_awake(priv);
 339				if (ret)
 340					netdev_err(priv->dev,
 341						   "deep sleep: wakeup failed\n");
 342			}
 343		}
 344	}
 345
 346	return ret;
 347}
 348
 349static int lbs_ret_host_sleep_activate(struct lbs_private *priv,
 350		unsigned long dummy,
 351		struct cmd_header *cmd)
 352{
 353	priv->is_host_sleep_activated = 1;
 354	wake_up_interruptible(&priv->host_sleep_q);
 355
 356	return 0;
 357}
 358
 359int lbs_set_host_sleep(struct lbs_private *priv, int host_sleep)
 360{
 361	struct cmd_header cmd;
 362	int ret = 0;
 363	uint32_t criteria = EHS_REMOVE_WAKEUP;
 364
 365	if (host_sleep) {
 366		if (priv->is_host_sleep_activated != 1) {
 367			memset(&cmd, 0, sizeof(cmd));
 368			ret = lbs_host_sleep_cfg(priv, priv->wol_criteria,
 369					(struct wol_config *)NULL);
 370			if (ret) {
 371				netdev_info(priv->dev,
 372					    "Host sleep configuration failed: %d\n",
 373					    ret);
 374				return ret;
 375			}
 376			if (priv->psstate == PS_STATE_FULL_POWER) {
 377				ret = __lbs_cmd(priv,
 378						CMD_802_11_HOST_SLEEP_ACTIVATE,
 379						&cmd,
 380						sizeof(cmd),
 381						lbs_ret_host_sleep_activate, 0);
 382				if (ret)
 383					netdev_info(priv->dev,
 384						    "HOST_SLEEP_ACTIVATE failed: %d\n",
 385						    ret);
 386			}
 387
 388			if (!wait_event_interruptible_timeout(
 389						priv->host_sleep_q,
 390						priv->is_host_sleep_activated,
 391						(10 * HZ))) {
 392				netdev_err(priv->dev,
 393					   "host_sleep_q: timer expired\n");
 394				ret = -1;
 395			}
 396		} else {
 397			netdev_err(priv->dev, "host sleep: already enabled\n");
 398		}
 399	} else {
 400		if (priv->is_host_sleep_activated)
 401			ret = lbs_host_sleep_cfg(priv, criteria,
 402					(struct wol_config *)NULL);
 403	}
 404
 405	return ret;
 406}
 407
 408/**
 409 *  lbs_set_snmp_mib - Set an SNMP MIB value
 410 *
 411 *  @priv:	A pointer to &struct lbs_private structure
 412 *  @oid:	The OID to set in the firmware
 413 *  @val:	Value to set the OID to
 414 *
 415 *  returns: 	   	0 on success, error on failure
 416 */
 417int lbs_set_snmp_mib(struct lbs_private *priv, u32 oid, u16 val)
 418{
 419	struct cmd_ds_802_11_snmp_mib cmd;
 420	int ret;
 421
 422	memset(&cmd, 0, sizeof (cmd));
 423	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 424	cmd.action = cpu_to_le16(CMD_ACT_SET);
 425	cmd.oid = cpu_to_le16((u16) oid);
 426
 427	switch (oid) {
 428	case SNMP_MIB_OID_BSS_TYPE:
 429		cmd.bufsize = cpu_to_le16(sizeof(u8));
 430		cmd.value[0] = val;
 431		break;
 432	case SNMP_MIB_OID_11D_ENABLE:
 433	case SNMP_MIB_OID_FRAG_THRESHOLD:
 434	case SNMP_MIB_OID_RTS_THRESHOLD:
 435	case SNMP_MIB_OID_SHORT_RETRY_LIMIT:
 436	case SNMP_MIB_OID_LONG_RETRY_LIMIT:
 437		cmd.bufsize = cpu_to_le16(sizeof(u16));
 438		*((__le16 *)(&cmd.value)) = cpu_to_le16(val);
 439		break;
 440	default:
 441		lbs_deb_cmd("SNMP_CMD: (set) unhandled OID 0x%x\n", oid);
 442		ret = -EINVAL;
 443		goto out;
 444	}
 445
 446	lbs_deb_cmd("SNMP_CMD: (set) oid 0x%x, oid size 0x%x, value 0x%x\n",
 447		    le16_to_cpu(cmd.oid), le16_to_cpu(cmd.bufsize), val);
 448
 449	ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 450
 451out:
 452	return ret;
 453}
 454
 455/**
 456 *  lbs_get_snmp_mib - Get an SNMP MIB value
 457 *
 458 *  @priv:	A pointer to &struct lbs_private structure
 459 *  @oid:	The OID to retrieve from the firmware
 460 *  @out_val:	Location for the returned value
 461 *
 462 *  returns:	0 on success, error on failure
 463 */
 464int lbs_get_snmp_mib(struct lbs_private *priv, u32 oid, u16 *out_val)
 465{
 466	struct cmd_ds_802_11_snmp_mib cmd;
 467	int ret;
 468
 469	memset(&cmd, 0, sizeof (cmd));
 470	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 471	cmd.action = cpu_to_le16(CMD_ACT_GET);
 472	cmd.oid = cpu_to_le16(oid);
 473
 474	ret = lbs_cmd_with_response(priv, CMD_802_11_SNMP_MIB, &cmd);
 475	if (ret)
 476		goto out;
 477
 478	switch (le16_to_cpu(cmd.bufsize)) {
 479	case sizeof(u8):
 480		*out_val = cmd.value[0];
 481		break;
 482	case sizeof(u16):
 483		*out_val = le16_to_cpu(*((__le16 *)(&cmd.value)));
 484		break;
 485	default:
 486		lbs_deb_cmd("SNMP_CMD: (get) unhandled OID 0x%x size %d\n",
 487		            oid, le16_to_cpu(cmd.bufsize));
 488		break;
 489	}
 490
 491out:
 492	return ret;
 493}
 494
 495/**
 496 *  lbs_get_tx_power - Get the min, max, and current TX power
 497 *
 498 *  @priv:	A pointer to &struct lbs_private structure
 499 *  @curlevel:	Current power level in dBm
 500 *  @minlevel:	Minimum supported power level in dBm (optional)
 501 *  @maxlevel:	Maximum supported power level in dBm (optional)
 502 *
 503 *  returns:	0 on success, error on failure
 504 */
 505int lbs_get_tx_power(struct lbs_private *priv, s16 *curlevel, s16 *minlevel,
 506		     s16 *maxlevel)
 507{
 508	struct cmd_ds_802_11_rf_tx_power cmd;
 509	int ret;
 510
 511	memset(&cmd, 0, sizeof(cmd));
 512	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 513	cmd.action = cpu_to_le16(CMD_ACT_GET);
 514
 515	ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 516	if (ret == 0) {
 517		*curlevel = le16_to_cpu(cmd.curlevel);
 518		if (minlevel)
 519			*minlevel = cmd.minlevel;
 520		if (maxlevel)
 521			*maxlevel = cmd.maxlevel;
 522	}
 523
 524	return ret;
 525}
 526
 527/**
 528 *  lbs_set_tx_power - Set the TX power
 529 *
 530 *  @priv:	A pointer to &struct lbs_private structure
 531 *  @dbm:	The desired power level in dBm
 532 *
 533 *  returns: 	   	0 on success, error on failure
 534 */
 535int lbs_set_tx_power(struct lbs_private *priv, s16 dbm)
 536{
 537	struct cmd_ds_802_11_rf_tx_power cmd;
 538	int ret;
 539
 540	memset(&cmd, 0, sizeof(cmd));
 541	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 542	cmd.action = cpu_to_le16(CMD_ACT_SET);
 543	cmd.curlevel = cpu_to_le16(dbm);
 544
 545	lbs_deb_cmd("SET_RF_TX_POWER: %d dBm\n", dbm);
 546
 547	ret = lbs_cmd_with_response(priv, CMD_802_11_RF_TX_POWER, &cmd);
 548
 549	return ret;
 550}
 551
 552/**
 553 *  lbs_set_monitor_mode - Enable or disable monitor mode
 554 *  (only implemented on OLPC usb8388 FW)
 555 *
 556 *  @priv:	A pointer to &struct lbs_private structure
 557 *  @enable:	1 to enable monitor mode, 0 to disable
 558 *
 559 *  returns:	0 on success, error on failure
 560 */
 561int lbs_set_monitor_mode(struct lbs_private *priv, int enable)
 562{
 563	struct cmd_ds_802_11_monitor_mode cmd;
 564	int ret;
 565
 566	memset(&cmd, 0, sizeof(cmd));
 567	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 568	cmd.action = cpu_to_le16(CMD_ACT_SET);
 569	if (enable)
 570		cmd.mode = cpu_to_le16(0x1);
 571
 572	lbs_deb_cmd("SET_MONITOR_MODE: %d\n", enable);
 573
 574	ret = lbs_cmd_with_response(priv, CMD_802_11_MONITOR_MODE, &cmd);
 575	if (ret == 0) {
 576		priv->dev->type = enable ? ARPHRD_IEEE80211_RADIOTAP :
 577						ARPHRD_ETHER;
 578	}
 579
 580	return ret;
 581}
 582
 583/**
 584 *  lbs_get_channel - Get the radio channel
 585 *
 586 *  @priv:	A pointer to &struct lbs_private structure
 587 *
 588 *  returns:	The channel on success, error on failure
 589 */
 590static int lbs_get_channel(struct lbs_private *priv)
 591{
 592	struct cmd_ds_802_11_rf_channel cmd;
 593	int ret = 0;
 594
 595	memset(&cmd, 0, sizeof(cmd));
 596	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 597	cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_GET);
 598
 599	ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 600	if (ret)
 601		goto out;
 602
 603	ret = le16_to_cpu(cmd.channel);
 604	lbs_deb_cmd("current radio channel is %d\n", ret);
 605
 606out:
 607	return ret;
 608}
 609
 610int lbs_update_channel(struct lbs_private *priv)
 611{
 612	int ret;
 613
 614	/* the channel in f/w could be out of sync; get the current channel */
 615	ret = lbs_get_channel(priv);
 616	if (ret > 0) {
 617		priv->channel = ret;
 618		ret = 0;
 619	}
 620
 621	return ret;
 622}
 623
 624/**
 625 *  lbs_set_channel - Set the radio channel
 626 *
 627 *  @priv:	A pointer to &struct lbs_private structure
 628 *  @channel:	The desired channel, or 0 to clear a locked channel
 629 *
 630 *  returns:	0 on success, error on failure
 631 */
 632int lbs_set_channel(struct lbs_private *priv, u8 channel)
 633{
 634	struct cmd_ds_802_11_rf_channel cmd;
 635#ifdef DEBUG
 636	u8 old_channel = priv->channel;
 637#endif
 638	int ret = 0;
 639
 640	memset(&cmd, 0, sizeof(cmd));
 641	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 642	cmd.action = cpu_to_le16(CMD_OPT_802_11_RF_CHANNEL_SET);
 643	cmd.channel = cpu_to_le16(channel);
 644
 645	ret = lbs_cmd_with_response(priv, CMD_802_11_RF_CHANNEL, &cmd);
 646	if (ret)
 647		goto out;
 648
 649	priv->channel = (uint8_t) le16_to_cpu(cmd.channel);
 650	lbs_deb_cmd("channel switch from %d to %d\n", old_channel,
 651		priv->channel);
 652
 653out:
 654	return ret;
 655}
 656
 657/**
 658 * lbs_get_rssi - Get current RSSI and noise floor
 659 *
 660 * @priv:	A pointer to &struct lbs_private structure
 661 * @rssi:	On successful return, signal level in mBm
 662 * @nf:		On successful return, Noise floor
 663 *
 664 * returns:	The channel on success, error on failure
 665 */
 666int lbs_get_rssi(struct lbs_private *priv, s8 *rssi, s8 *nf)
 667{
 668	struct cmd_ds_802_11_rssi cmd;
 669	int ret = 0;
 670
 671	BUG_ON(rssi == NULL);
 672	BUG_ON(nf == NULL);
 673
 674	memset(&cmd, 0, sizeof(cmd));
 675	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 676	/* Average SNR over last 8 beacons */
 677	cmd.n_or_snr = cpu_to_le16(8);
 678
 679	ret = lbs_cmd_with_response(priv, CMD_802_11_RSSI, &cmd);
 680	if (ret == 0) {
 681		*nf = CAL_NF(le16_to_cpu(cmd.nf));
 682		*rssi = CAL_RSSI(le16_to_cpu(cmd.n_or_snr), le16_to_cpu(cmd.nf));
 683	}
 684
 685	return ret;
 686}
 687
 688/**
 689 *  lbs_set_11d_domain_info - Send regulatory and 802.11d domain information
 690 *  to the firmware
 691 *
 692 *  @priv:	pointer to &struct lbs_private
 693 *
 694 *  returns:	0 on success, error code on failure
 695*/
 696int lbs_set_11d_domain_info(struct lbs_private *priv)
 697{
 698	struct wiphy *wiphy = priv->wdev->wiphy;
 699	struct ieee80211_supported_band **bands = wiphy->bands;
 700	struct cmd_ds_802_11d_domain_info cmd;
 701	struct mrvl_ie_domain_param_set *domain = &cmd.domain;
 702	struct ieee80211_country_ie_triplet *t;
 703	enum nl80211_band band;
 704	struct ieee80211_channel *ch;
 705	u8 num_triplet = 0;
 706	u8 num_parsed_chan = 0;
 707	u8 first_channel = 0, next_chan = 0, max_pwr = 0;
 708	u8 i, flag = 0;
 709	size_t triplet_size;
 710	int ret = 0;
 711
 712	if (!priv->country_code[0])
 713		goto out;
 714
 715	memset(&cmd, 0, sizeof(cmd));
 716	cmd.action = cpu_to_le16(CMD_ACT_SET);
 717
 718	lbs_deb_11d("Setting country code '%c%c'\n",
 719		    priv->country_code[0], priv->country_code[1]);
 720
 721	domain->header.type = cpu_to_le16(TLV_TYPE_DOMAIN);
 722
 723	/* Set country code */
 724	domain->country_code[0] = priv->country_code[0];
 725	domain->country_code[1] = priv->country_code[1];
 726	domain->country_code[2] = ' ';
 727
 728	/* Now set up the channel triplets; firmware is somewhat picky here
 729	 * and doesn't validate channel numbers and spans; hence it would
 730	 * interpret a triplet of (36, 4, 20) as channels 36, 37, 38, 39.  Since
 731	 * the last 3 aren't valid channels, the driver is responsible for
 732	 * splitting that up into 4 triplet pairs of (36, 1, 20) + (40, 1, 20)
 733	 * etc.
 734	 */
 735	for (band = 0;
 736	     (band < NUM_NL80211_BANDS) && (num_triplet < MAX_11D_TRIPLETS);
 737	     band++) {
 738
 739		if (!bands[band])
 740			continue;
 741
 742		for (i = 0;
 743		     (i < bands[band]->n_channels) && (num_triplet < MAX_11D_TRIPLETS);
 744		     i++) {
 745			ch = &bands[band]->channels[i];
 746			if (ch->flags & IEEE80211_CHAN_DISABLED)
 747				continue;
 748
 749			if (!flag) {
 750				flag = 1;
 751				next_chan = first_channel = (u32) ch->hw_value;
 752				max_pwr = ch->max_power;
 753				num_parsed_chan = 1;
 754				continue;
 755			}
 756
 757			if ((ch->hw_value == next_chan + 1) &&
 758					(ch->max_power == max_pwr)) {
 759				/* Consolidate adjacent channels */
 760				next_chan++;
 761				num_parsed_chan++;
 762			} else {
 763				/* Add this triplet */
 764				lbs_deb_11d("11D triplet (%d, %d, %d)\n",
 765					first_channel, num_parsed_chan,
 766					max_pwr);
 767				t = &domain->triplet[num_triplet];
 768				t->chans.first_channel = first_channel;
 769				t->chans.num_channels = num_parsed_chan;
 770				t->chans.max_power = max_pwr;
 771				num_triplet++;
 772				flag = 0;
 773			}
 774		}
 775
 776		if (flag) {
 777			/* Add last triplet */
 778			lbs_deb_11d("11D triplet (%d, %d, %d)\n", first_channel,
 779				num_parsed_chan, max_pwr);
 780			t = &domain->triplet[num_triplet];
 781			t->chans.first_channel = first_channel;
 782			t->chans.num_channels = num_parsed_chan;
 783			t->chans.max_power = max_pwr;
 784			num_triplet++;
 785		}
 786	}
 787
 788	lbs_deb_11d("# triplets %d\n", num_triplet);
 789
 790	/* Set command header sizes */
 791	triplet_size = num_triplet * sizeof(struct ieee80211_country_ie_triplet);
 792	domain->header.len = cpu_to_le16(sizeof(domain->country_code) +
 793					triplet_size);
 794
 795	lbs_deb_hex(LBS_DEB_11D, "802.11D domain param set",
 796			(u8 *) &cmd.domain.country_code,
 797			le16_to_cpu(domain->header.len));
 798
 799	cmd.hdr.size = cpu_to_le16(sizeof(cmd.hdr) +
 800				   sizeof(cmd.action) +
 801				   sizeof(cmd.domain.header) +
 802				   sizeof(cmd.domain.country_code) +
 803				   triplet_size);
 804
 805	ret = lbs_cmd_with_response(priv, CMD_802_11D_DOMAIN_INFO, &cmd);
 806
 807out:
 808	return ret;
 809}
 810
 811/**
 812 *  lbs_get_reg - Read a MAC, Baseband, or RF register
 813 *
 814 *  @priv:	pointer to &struct lbs_private
 815 *  @reg:	register command, one of CMD_MAC_REG_ACCESS,
 816 *		CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 817 *  @offset:	byte offset of the register to get
 818 *  @value:	on success, the value of the register at 'offset'
 819 *
 820 *  returns:	0 on success, error code on failure
 821*/
 822int lbs_get_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 *value)
 823{
 824	struct cmd_ds_reg_access cmd;
 825	int ret = 0;
 826
 827	BUG_ON(value == NULL);
 828
 829	memset(&cmd, 0, sizeof(cmd));
 830	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 831	cmd.action = cpu_to_le16(CMD_ACT_GET);
 832	cmd.offset = cpu_to_le16(offset);
 833
 834	if (reg != CMD_MAC_REG_ACCESS &&
 835	    reg != CMD_BBP_REG_ACCESS &&
 836	    reg != CMD_RF_REG_ACCESS) {
 837		ret = -EINVAL;
 838		goto out;
 839	}
 840
 841	ret = lbs_cmd_with_response(priv, reg, &cmd);
 842	if (!ret) {
 843		if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
 844			*value = cmd.value.bbp_rf;
 845		else if (reg == CMD_MAC_REG_ACCESS)
 846			*value = le32_to_cpu(cmd.value.mac);
 847	}
 848
 849out:
 850	return ret;
 851}
 852
 853/**
 854 *  lbs_set_reg - Write a MAC, Baseband, or RF register
 855 *
 856 *  @priv:	pointer to &struct lbs_private
 857 *  @reg:	register command, one of CMD_MAC_REG_ACCESS,
 858 *		CMD_BBP_REG_ACCESS, or CMD_RF_REG_ACCESS
 859 *  @offset:	byte offset of the register to set
 860 *  @value:	the value to write to the register at 'offset'
 861 *
 862 *  returns:	0 on success, error code on failure
 863*/
 864int lbs_set_reg(struct lbs_private *priv, u16 reg, u16 offset, u32 value)
 865{
 866	struct cmd_ds_reg_access cmd;
 867	int ret = 0;
 868
 869	memset(&cmd, 0, sizeof(cmd));
 870	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
 871	cmd.action = cpu_to_le16(CMD_ACT_SET);
 872	cmd.offset = cpu_to_le16(offset);
 873
 874	if (reg == CMD_BBP_REG_ACCESS || reg == CMD_RF_REG_ACCESS)
 875		cmd.value.bbp_rf = (u8) (value & 0xFF);
 876	else if (reg == CMD_MAC_REG_ACCESS)
 877		cmd.value.mac = cpu_to_le32(value);
 878	else {
 879		ret = -EINVAL;
 880		goto out;
 881	}
 882
 883	ret = lbs_cmd_with_response(priv, reg, &cmd);
 884
 885out:
 886	return ret;
 887}
 888
 889static void lbs_queue_cmd(struct lbs_private *priv,
 890			  struct cmd_ctrl_node *cmdnode)
 891{
 892	unsigned long flags;
 893	int addtail = 1;
 894
 895	if (!cmdnode) {
 896		lbs_deb_host("QUEUE_CMD: cmdnode is NULL\n");
 897		return;
 898	}
 899	if (!cmdnode->cmdbuf->size) {
 900		lbs_deb_host("DNLD_CMD: cmd size is zero\n");
 901		return;
 902	}
 903	cmdnode->result = 0;
 904
 905	/* Exit_PS command needs to be queued in the header always. */
 906	if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_PS_MODE) {
 907		struct cmd_ds_802_11_ps_mode *psm = (void *)cmdnode->cmdbuf;
 908
 909		if (psm->action == cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
 910			if (priv->psstate != PS_STATE_FULL_POWER)
 911				addtail = 0;
 912		}
 913	}
 914
 915	if (le16_to_cpu(cmdnode->cmdbuf->command) == CMD_802_11_WAKEUP_CONFIRM)
 916		addtail = 0;
 917
 918	spin_lock_irqsave(&priv->driver_lock, flags);
 919
 920	if (addtail)
 921		list_add_tail(&cmdnode->list, &priv->cmdpendingq);
 922	else
 923		list_add(&cmdnode->list, &priv->cmdpendingq);
 924
 925	spin_unlock_irqrestore(&priv->driver_lock, flags);
 926
 927	lbs_deb_host("QUEUE_CMD: inserted command 0x%04x into cmdpendingq\n",
 928		     le16_to_cpu(cmdnode->cmdbuf->command));
 929}
 930
 931static void lbs_submit_command(struct lbs_private *priv,
 932			       struct cmd_ctrl_node *cmdnode)
 933{
 934	unsigned long flags;
 935	struct cmd_header *cmd;
 936	uint16_t cmdsize;
 937	uint16_t command;
 938	int timeo = 3 * HZ;
 939	int ret;
 940
 941	cmd = cmdnode->cmdbuf;
 942
 943	spin_lock_irqsave(&priv->driver_lock, flags);
 944	priv->seqnum++;
 945	cmd->seqnum = cpu_to_le16(priv->seqnum);
 946	priv->cur_cmd = cmdnode;
 947	spin_unlock_irqrestore(&priv->driver_lock, flags);
 948
 949	cmdsize = le16_to_cpu(cmd->size);
 950	command = le16_to_cpu(cmd->command);
 951
 952	/* These commands take longer */
 953	if (command == CMD_802_11_SCAN || command == CMD_802_11_ASSOCIATE)
 954		timeo = 5 * HZ;
 955
 956	lbs_deb_cmd("DNLD_CMD: command 0x%04x, seq %d, size %d\n",
 957		     command, le16_to_cpu(cmd->seqnum), cmdsize);
 958	lbs_deb_hex(LBS_DEB_CMD, "DNLD_CMD", (void *) cmdnode->cmdbuf, cmdsize);
 959
 960	ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) cmd, cmdsize);
 961
 962	if (ret) {
 963		netdev_info(priv->dev, "DNLD_CMD: hw_host_to_card failed: %d\n",
 964			    ret);
 965		/* Reset dnld state machine, report failure */
 966		priv->dnld_sent = DNLD_RES_RECEIVED;
 967		lbs_complete_command(priv, cmdnode, ret);
 968	}
 969
 970	if (command == CMD_802_11_DEEP_SLEEP) {
 971		if (priv->is_auto_deep_sleep_enabled) {
 972			priv->wakeup_dev_required = 1;
 973			priv->dnld_sent = 0;
 974		}
 975		priv->is_deep_sleep = 1;
 976		lbs_complete_command(priv, cmdnode, 0);
 977	} else {
 978		/* Setup the timer after transmit command */
 979		mod_timer(&priv->command_timer, jiffies + timeo);
 980	}
 981}
 982
 983/*
 984 *  This function inserts command node to cmdfreeq
 985 *  after cleans it. Requires priv->driver_lock held.
 986 */
 987static void __lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
 988					 struct cmd_ctrl_node *cmdnode)
 989{
 990	if (!cmdnode)
 991		return;
 992
 993	cmdnode->callback = NULL;
 994	cmdnode->callback_arg = 0;
 995
 996	memset(cmdnode->cmdbuf, 0, LBS_CMD_BUFFER_SIZE);
 997
 998	list_add_tail(&cmdnode->list, &priv->cmdfreeq);
 999}
1000
1001static void lbs_cleanup_and_insert_cmd(struct lbs_private *priv,
1002	struct cmd_ctrl_node *ptempcmd)
1003{
1004	unsigned long flags;
1005
1006	spin_lock_irqsave(&priv->driver_lock, flags);
1007	__lbs_cleanup_and_insert_cmd(priv, ptempcmd);
1008	spin_unlock_irqrestore(&priv->driver_lock, flags);
1009}
1010
1011void __lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1012			    int result)
1013{
1014	/*
1015	 * Normally, commands are removed from cmdpendingq before being
1016	 * submitted. However, we can arrive here on alternative codepaths
1017	 * where the command is still pending. Make sure the command really
1018	 * isn't part of a list at this point.
1019	 */
1020	list_del_init(&cmd->list);
1021
1022	cmd->result = result;
1023	cmd->cmdwaitqwoken = 1;
1024	wake_up(&cmd->cmdwait_q);
1025
1026	if (!cmd->callback || cmd->callback == lbs_cmd_async_callback)
1027		__lbs_cleanup_and_insert_cmd(priv, cmd);
1028	priv->cur_cmd = NULL;
1029	wake_up(&priv->waitq);
1030}
1031
1032void lbs_complete_command(struct lbs_private *priv, struct cmd_ctrl_node *cmd,
1033			  int result)
1034{
1035	unsigned long flags;
1036	spin_lock_irqsave(&priv->driver_lock, flags);
1037	__lbs_complete_command(priv, cmd, result);
1038	spin_unlock_irqrestore(&priv->driver_lock, flags);
1039}
1040
1041int lbs_set_radio(struct lbs_private *priv, u8 preamble, u8 radio_on)
1042{
1043	struct cmd_ds_802_11_radio_control cmd;
1044	int ret = -EINVAL;
1045
1046	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1047	cmd.action = cpu_to_le16(CMD_ACT_SET);
1048	cmd.control = 0;
1049
1050	/* Only v8 and below support setting the preamble */
1051	if (priv->fwrelease < 0x09000000) {
1052		switch (preamble) {
1053		case RADIO_PREAMBLE_SHORT:
1054		case RADIO_PREAMBLE_AUTO:
1055		case RADIO_PREAMBLE_LONG:
1056			cmd.control = cpu_to_le16(preamble);
1057			break;
1058		default:
1059			goto out;
1060		}
1061	}
1062
1063	if (radio_on)
1064		cmd.control |= cpu_to_le16(0x1);
1065	else {
1066		cmd.control &= cpu_to_le16(~0x1);
1067		priv->txpower_cur = 0;
1068	}
1069
1070	lbs_deb_cmd("RADIO_CONTROL: radio %s, preamble %d\n",
1071		    radio_on ? "ON" : "OFF", preamble);
1072
1073	priv->radio_on = radio_on;
1074
1075	ret = lbs_cmd_with_response(priv, CMD_802_11_RADIO_CONTROL, &cmd);
1076
1077out:
1078	return ret;
1079}
1080
1081void lbs_set_mac_control(struct lbs_private *priv)
1082{
1083	struct cmd_ds_mac_control cmd;
1084
1085	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1086	cmd.action = cpu_to_le16(priv->mac_control);
1087	cmd.reserved = 0;
1088
1089	lbs_cmd_async(priv, CMD_MAC_CONTROL, &cmd.hdr, sizeof(cmd));
1090}
1091
1092int lbs_set_mac_control_sync(struct lbs_private *priv)
1093{
1094	struct cmd_ds_mac_control cmd;
1095	int ret = 0;
1096
1097	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1098	cmd.action = cpu_to_le16(priv->mac_control);
1099	cmd.reserved = 0;
1100	ret = lbs_cmd_with_response(priv, CMD_MAC_CONTROL, &cmd);
1101
1102	return ret;
1103}
1104
1105/**
1106 *  lbs_allocate_cmd_buffer - allocates the command buffer and links
1107 *  it to command free queue
1108 *
1109 *  @priv:	A pointer to &struct lbs_private structure
1110 *
1111 *  returns:	0 for success or -1 on error
1112 */
1113int lbs_allocate_cmd_buffer(struct lbs_private *priv)
1114{
1115	int ret = 0;
1116	u32 bufsize;
1117	u32 i;
1118	struct cmd_ctrl_node *cmdarray;
1119
1120	/* Allocate and initialize the command array */
1121	bufsize = sizeof(struct cmd_ctrl_node) * LBS_NUM_CMD_BUFFERS;
1122	if (!(cmdarray = kzalloc(bufsize, GFP_KERNEL))) {
1123		lbs_deb_host("ALLOC_CMD_BUF: tempcmd_array is NULL\n");
1124		ret = -1;
1125		goto done;
1126	}
1127	priv->cmd_array = cmdarray;
1128
1129	/* Allocate and initialize each command buffer in the command array */
1130	for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1131		cmdarray[i].cmdbuf = kzalloc(LBS_CMD_BUFFER_SIZE, GFP_KERNEL);
1132		if (!cmdarray[i].cmdbuf) {
1133			lbs_deb_host("ALLOC_CMD_BUF: ptempvirtualaddr is NULL\n");
1134			ret = -1;
1135			goto done;
1136		}
1137	}
1138
1139	for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1140		init_waitqueue_head(&cmdarray[i].cmdwait_q);
1141		lbs_cleanup_and_insert_cmd(priv, &cmdarray[i]);
1142	}
1143	ret = 0;
1144
1145done:
1146	return ret;
1147}
1148
1149/**
1150 *  lbs_free_cmd_buffer - free the command buffer
1151 *
1152 *  @priv:	A pointer to &struct lbs_private structure
1153 *
1154 *  returns:	0 for success
1155 */
1156int lbs_free_cmd_buffer(struct lbs_private *priv)
1157{
1158	struct cmd_ctrl_node *cmdarray;
1159	unsigned int i;
1160
1161	/* need to check if cmd array is allocated or not */
1162	if (priv->cmd_array == NULL) {
1163		lbs_deb_host("FREE_CMD_BUF: cmd_array is NULL\n");
1164		goto done;
1165	}
1166
1167	cmdarray = priv->cmd_array;
1168
1169	/* Release shared memory buffers */
1170	for (i = 0; i < LBS_NUM_CMD_BUFFERS; i++) {
1171		if (cmdarray[i].cmdbuf) {
1172			kfree(cmdarray[i].cmdbuf);
1173			cmdarray[i].cmdbuf = NULL;
1174		}
1175	}
1176
1177	/* Release cmd_ctrl_node */
1178	if (priv->cmd_array) {
1179		kfree(priv->cmd_array);
1180		priv->cmd_array = NULL;
1181	}
1182
1183done:
1184	return 0;
1185}
1186
1187/**
1188 *  lbs_get_free_cmd_node - gets a free command node if available in
1189 *  command free queue
1190 *
1191 *  @priv:	A pointer to &struct lbs_private structure
1192 *
1193 *  returns:	A pointer to &cmd_ctrl_node structure on success
1194 *		or %NULL on error
1195 */
1196static struct cmd_ctrl_node *lbs_get_free_cmd_node(struct lbs_private *priv)
1197{
1198	struct cmd_ctrl_node *tempnode;
1199	unsigned long flags;
1200
1201	if (!priv)
1202		return NULL;
1203
1204	spin_lock_irqsave(&priv->driver_lock, flags);
1205
1206	if (!list_empty(&priv->cmdfreeq)) {
1207		tempnode = list_first_entry(&priv->cmdfreeq,
1208					    struct cmd_ctrl_node, list);
1209		list_del_init(&tempnode->list);
1210	} else {
1211		lbs_deb_host("GET_CMD_NODE: cmd_ctrl_node is not available\n");
1212		tempnode = NULL;
1213	}
1214
1215	spin_unlock_irqrestore(&priv->driver_lock, flags);
1216
1217	return tempnode;
1218}
1219
1220/**
1221 *  lbs_execute_next_command - execute next command in command
1222 *  pending queue. Will put firmware back to PS mode if applicable.
1223 *
1224 *  @priv:	A pointer to &struct lbs_private structure
1225 *
1226 *  returns:	0 on success or -1 on error
1227 */
1228int lbs_execute_next_command(struct lbs_private *priv)
1229{
1230	struct cmd_ctrl_node *cmdnode = NULL;
1231	struct cmd_header *cmd;
1232	unsigned long flags;
1233	int ret = 0;
1234
1235	/* Debug group is LBS_DEB_THREAD and not LBS_DEB_HOST, because the
1236	 * only caller to us is lbs_thread() and we get even when a
1237	 * data packet is received */
1238	spin_lock_irqsave(&priv->driver_lock, flags);
1239
1240	if (priv->cur_cmd) {
1241		netdev_alert(priv->dev,
1242			     "EXEC_NEXT_CMD: already processing command!\n");
1243		spin_unlock_irqrestore(&priv->driver_lock, flags);
1244		ret = -1;
1245		goto done;
1246	}
1247
1248	if (!list_empty(&priv->cmdpendingq)) {
1249		cmdnode = list_first_entry(&priv->cmdpendingq,
1250					   struct cmd_ctrl_node, list);
1251	}
1252
1253	spin_unlock_irqrestore(&priv->driver_lock, flags);
1254
1255	if (cmdnode) {
1256		cmd = cmdnode->cmdbuf;
1257
1258		if (is_command_allowed_in_ps(le16_to_cpu(cmd->command))) {
1259			if ((priv->psstate == PS_STATE_SLEEP) ||
1260			    (priv->psstate == PS_STATE_PRE_SLEEP)) {
1261				lbs_deb_host(
1262				       "EXEC_NEXT_CMD: cannot send cmd 0x%04x in psstate %d\n",
1263				       le16_to_cpu(cmd->command),
1264				       priv->psstate);
1265				ret = -1;
1266				goto done;
1267			}
1268			lbs_deb_host("EXEC_NEXT_CMD: OK to send command "
1269				     "0x%04x in psstate %d\n",
1270				     le16_to_cpu(cmd->command), priv->psstate);
1271		} else if (priv->psstate != PS_STATE_FULL_POWER) {
1272			/*
1273			 * 1. Non-PS command:
1274			 * Queue it. set needtowakeup to TRUE if current state
1275			 * is SLEEP, otherwise call send EXIT_PS.
1276			 * 2. PS command but not EXIT_PS:
1277			 * Ignore it.
1278			 * 3. PS command EXIT_PS:
1279			 * Set needtowakeup to TRUE if current state is SLEEP,
1280			 * otherwise send this command down to firmware
1281			 * immediately.
1282			 */
1283			if (cmd->command != cpu_to_le16(CMD_802_11_PS_MODE)) {
1284				/*  Prepare to send Exit PS,
1285				 *  this non PS command will be sent later */
1286				if ((priv->psstate == PS_STATE_SLEEP)
1287				    || (priv->psstate == PS_STATE_PRE_SLEEP)
1288				    ) {
1289					/* w/ new scheme, it will not reach here.
1290					   since it is blocked in main_thread. */
1291					priv->needtowakeup = 1;
1292				} else {
1293					lbs_set_ps_mode(priv,
1294							PS_MODE_ACTION_EXIT_PS,
1295							false);
1296				}
1297
1298				ret = 0;
1299				goto done;
1300			} else {
1301				/*
1302				 * PS command. Ignore it if it is not Exit_PS.
1303				 * otherwise send it down immediately.
1304				 */
1305				struct cmd_ds_802_11_ps_mode *psm = (void *)cmd;
1306
1307				lbs_deb_host(
1308				       "EXEC_NEXT_CMD: PS cmd, action 0x%02x\n",
1309				       psm->action);
1310				if (psm->action !=
1311				    cpu_to_le16(PS_MODE_ACTION_EXIT_PS)) {
1312					lbs_deb_host(
1313					       "EXEC_NEXT_CMD: ignore ENTER_PS cmd\n");
1314					lbs_complete_command(priv, cmdnode, 0);
1315
1316					ret = 0;
1317					goto done;
1318				}
1319
1320				if ((priv->psstate == PS_STATE_SLEEP) ||
1321				    (priv->psstate == PS_STATE_PRE_SLEEP)) {
1322					lbs_deb_host(
1323					       "EXEC_NEXT_CMD: ignore EXIT_PS cmd in sleep\n");
1324					lbs_complete_command(priv, cmdnode, 0);
1325					priv->needtowakeup = 1;
1326
1327					ret = 0;
1328					goto done;
1329				}
1330
1331				lbs_deb_host(
1332				       "EXEC_NEXT_CMD: sending EXIT_PS\n");
1333			}
1334		}
1335		spin_lock_irqsave(&priv->driver_lock, flags);
1336		list_del_init(&cmdnode->list);
1337		spin_unlock_irqrestore(&priv->driver_lock, flags);
1338		lbs_deb_host("EXEC_NEXT_CMD: sending command 0x%04x\n",
1339			    le16_to_cpu(cmd->command));
1340		lbs_submit_command(priv, cmdnode);
1341	} else {
1342		/*
1343		 * check if in power save mode, if yes, put the device back
1344		 * to PS mode
1345		 */
1346		if ((priv->psmode != LBS802_11POWERMODECAM) &&
1347		    (priv->psstate == PS_STATE_FULL_POWER) &&
1348		    (priv->connect_status == LBS_CONNECTED)) {
1349			lbs_deb_host(
1350				"EXEC_NEXT_CMD: cmdpendingq empty, go back to PS_SLEEP");
1351			lbs_set_ps_mode(priv, PS_MODE_ACTION_ENTER_PS,
1352					false);
1353		}
1354	}
1355
1356	ret = 0;
1357done:
1358	return ret;
1359}
1360
1361static void lbs_send_confirmsleep(struct lbs_private *priv)
1362{
1363	unsigned long flags;
1364	int ret;
1365
1366	lbs_deb_hex(LBS_DEB_HOST, "sleep confirm", (u8 *) &confirm_sleep,
1367		sizeof(confirm_sleep));
1368
1369	ret = priv->hw_host_to_card(priv, MVMS_CMD, (u8 *) &confirm_sleep,
1370		sizeof(confirm_sleep));
1371	if (ret) {
1372		netdev_alert(priv->dev, "confirm_sleep failed\n");
1373		return;
1374	}
1375
1376	spin_lock_irqsave(&priv->driver_lock, flags);
1377
1378	/* We don't get a response on the sleep-confirmation */
1379	priv->dnld_sent = DNLD_RES_RECEIVED;
1380
1381	if (priv->is_host_sleep_configured) {
1382		priv->is_host_sleep_activated = 1;
1383		wake_up_interruptible(&priv->host_sleep_q);
1384	}
1385
1386	/* If nothing to do, go back to sleep (?) */
1387	if (!kfifo_len(&priv->event_fifo) && !priv->resp_len[priv->resp_idx])
1388		priv->psstate = PS_STATE_SLEEP;
1389
1390	spin_unlock_irqrestore(&priv->driver_lock, flags);
1391}
1392
1393/**
1394 * lbs_ps_confirm_sleep - checks condition and prepares to
1395 * send sleep confirm command to firmware if ok
1396 *
1397 * @priv:	A pointer to &struct lbs_private structure
1398 *
1399 * returns:	n/a
1400 */
1401void lbs_ps_confirm_sleep(struct lbs_private *priv)
1402{
1403	unsigned long flags =0;
1404	int allowed = 1;
1405
1406	spin_lock_irqsave(&priv->driver_lock, flags);
1407	if (priv->dnld_sent) {
1408		allowed = 0;
1409		lbs_deb_host("dnld_sent was set\n");
1410	}
1411
1412	/* In-progress command? */
1413	if (priv->cur_cmd) {
1414		allowed = 0;
1415		lbs_deb_host("cur_cmd was set\n");
1416	}
1417
1418	/* Pending events or command responses? */
1419	if (kfifo_len(&priv->event_fifo) || priv->resp_len[priv->resp_idx]) {
1420		allowed = 0;
1421		lbs_deb_host("pending events or command responses\n");
1422	}
1423	spin_unlock_irqrestore(&priv->driver_lock, flags);
1424
1425	if (allowed) {
1426		lbs_deb_host("sending lbs_ps_confirm_sleep\n");
1427		lbs_send_confirmsleep(priv);
1428	} else {
1429		lbs_deb_host("sleep confirm has been delayed\n");
1430	}
1431}
1432
1433
1434/**
1435 * lbs_set_tpc_cfg - Configures the transmission power control functionality
1436 *
1437 * @priv:	A pointer to &struct lbs_private structure
1438 * @enable:	Transmission power control enable
1439 * @p0:		Power level when link quality is good (dBm).
1440 * @p1:		Power level when link quality is fair (dBm).
1441 * @p2:		Power level when link quality is poor (dBm).
1442 * @usesnr:	Use Signal to Noise Ratio in TPC
1443 *
1444 * returns:	0 on success
1445 */
1446int lbs_set_tpc_cfg(struct lbs_private *priv, int enable, int8_t p0, int8_t p1,
1447		int8_t p2, int usesnr)
1448{
1449	struct cmd_ds_802_11_tpc_cfg cmd;
1450	int ret;
1451
1452	memset(&cmd, 0, sizeof(cmd));
1453	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1454	cmd.action = cpu_to_le16(CMD_ACT_SET);
1455	cmd.enable = !!enable;
1456	cmd.usesnr = !!usesnr;
1457	cmd.P0 = p0;
1458	cmd.P1 = p1;
1459	cmd.P2 = p2;
1460
1461	ret = lbs_cmd_with_response(priv, CMD_802_11_TPC_CFG, &cmd);
1462
1463	return ret;
1464}
1465
1466/**
1467 * lbs_set_power_adapt_cfg - Configures the power adaptation settings
1468 *
1469 * @priv:	A pointer to &struct lbs_private structure
1470 * @enable:	Power adaptation enable
1471 * @p0:		Power level for 1, 2, 5.5 and 11 Mbps (dBm).
1472 * @p1:		Power level for 6, 9, 12, 18, 22, 24 and 36 Mbps (dBm).
1473 * @p2:		Power level for 48 and 54 Mbps (dBm).
1474 *
1475 * returns:	0 on Success
1476 */
1477
1478int lbs_set_power_adapt_cfg(struct lbs_private *priv, int enable, int8_t p0,
1479		int8_t p1, int8_t p2)
1480{
1481	struct cmd_ds_802_11_pa_cfg cmd;
1482	int ret;
1483
1484	memset(&cmd, 0, sizeof(cmd));
1485	cmd.hdr.size = cpu_to_le16(sizeof(cmd));
1486	cmd.action = cpu_to_le16(CMD_ACT_SET);
1487	cmd.enable = !!enable;
1488	cmd.P0 = p0;
1489	cmd.P1 = p1;
1490	cmd.P2 = p2;
1491
1492	ret = lbs_cmd_with_response(priv, CMD_802_11_PA_CFG , &cmd);
1493
1494	return ret;
1495}
1496
1497
1498struct cmd_ctrl_node *__lbs_cmd_async(struct lbs_private *priv,
1499	uint16_t command, struct cmd_header *in_cmd, int in_cmd_size,
1500	int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1501	unsigned long callback_arg)
1502{
1503	struct cmd_ctrl_node *cmdnode;
1504
1505	if (priv->surpriseremoved) {
1506		lbs_deb_host("PREP_CMD: card removed\n");
1507		cmdnode = ERR_PTR(-ENOENT);
1508		goto done;
1509	}
1510
1511	/* No commands are allowed in Deep Sleep until we toggle the GPIO
1512	 * to wake up the card and it has signaled that it's ready.
1513	 */
1514	if (!priv->is_auto_deep_sleep_enabled) {
1515		if (priv->is_deep_sleep) {
1516			lbs_deb_cmd("command not allowed in deep sleep\n");
1517			cmdnode = ERR_PTR(-EBUSY);
1518			goto done;
1519		}
1520	}
1521
1522	cmdnode = lbs_get_free_cmd_node(priv);
1523	if (cmdnode == NULL) {
1524		lbs_deb_host("PREP_CMD: cmdnode is NULL\n");
1525
1526		/* Wake up main thread to execute next command */
1527		wake_up(&priv->waitq);
1528		cmdnode = ERR_PTR(-ENOBUFS);
1529		goto done;
1530	}
1531
1532	cmdnode->callback = callback;
1533	cmdnode->callback_arg = callback_arg;
1534
1535	/* Copy the incoming command to the buffer */
1536	memcpy(cmdnode->cmdbuf, in_cmd, in_cmd_size);
1537
1538	/* Set command, clean result, move to buffer */
1539	cmdnode->cmdbuf->command = cpu_to_le16(command);
1540	cmdnode->cmdbuf->size    = cpu_to_le16(in_cmd_size);
1541	cmdnode->cmdbuf->result  = 0;
1542
1543	lbs_deb_host("PREP_CMD: command 0x%04x\n", command);
1544
1545	cmdnode->cmdwaitqwoken = 0;
1546	lbs_queue_cmd(priv, cmdnode);
1547	wake_up(&priv->waitq);
1548
1549 done:
1550	return cmdnode;
1551}
1552
1553void lbs_cmd_async(struct lbs_private *priv, uint16_t command,
1554	struct cmd_header *in_cmd, int in_cmd_size)
1555{
1556	__lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1557		lbs_cmd_async_callback, 0);
1558}
1559
1560int __lbs_cmd(struct lbs_private *priv, uint16_t command,
1561	      struct cmd_header *in_cmd, int in_cmd_size,
1562	      int (*callback)(struct lbs_private *, unsigned long, struct cmd_header *),
1563	      unsigned long callback_arg)
1564{
1565	struct cmd_ctrl_node *cmdnode;
1566	unsigned long flags;
1567	int ret = 0;
1568
1569	cmdnode = __lbs_cmd_async(priv, command, in_cmd, in_cmd_size,
1570				  callback, callback_arg);
1571	if (IS_ERR(cmdnode)) {
1572		ret = PTR_ERR(cmdnode);
1573		goto done;
1574	}
1575
1576	might_sleep();
1577
1578	/*
1579	 * Be careful with signals here. A signal may be received as the system
1580	 * goes into suspend or resume. We do not want this to interrupt the
1581	 * command, so we perform an uninterruptible sleep.
1582	 */
1583	wait_event(cmdnode->cmdwait_q, cmdnode->cmdwaitqwoken);
1584
1585	spin_lock_irqsave(&priv->driver_lock, flags);
1586	ret = cmdnode->result;
1587	if (ret)
1588		netdev_info(priv->dev, "PREP_CMD: command 0x%04x failed: %d\n",
1589			    command, ret);
1590
1591	__lbs_cleanup_and_insert_cmd(priv, cmdnode);
1592	spin_unlock_irqrestore(&priv->driver_lock, flags);
1593
1594done:
1595	return ret;
1596}
1597EXPORT_SYMBOL_GPL(__lbs_cmd);