Exemplo n.º 1
0
static ssize_t ieee80211_if_parse_tsf(
	struct ieee80211_sub_if_data *sdata, const char *buf, int buflen)
{
	struct ieee80211_local *local = sdata->local;
	unsigned long long tsf;
	int ret;

	if (strncmp(buf, "reset", 5) == 0) {
		if (local->ops->reset_tsf) {
			drv_reset_tsf(local, sdata);
			wiphy_info(local->hw.wiphy, "debugfs reset TSF\n");
		}
	} else {
		ret = strict_strtoull(buf, 10, &tsf);
		if (ret < 0)
			return -EINVAL;
		if (local->ops->set_tsf) {
			drv_set_tsf(local, sdata, tsf);
			wiphy_info(local->hw.wiphy,
				   "debugfs set TSF to %#018llx\n", tsf);
		}
	}

	return buflen;
}
Exemplo n.º 2
0
static ssize_t tsf_write(struct file *file,
                         const char __user *user_buf,
                         size_t count, loff_t *ppos)
{
	struct ieee80211_local *local = file->private_data;
	unsigned long long tsf;
	char buf[100];
	size_t len;

	len = min(count, sizeof(buf) - 1);
	if (copy_from_user(buf, user_buf, len))
		return -EFAULT;
	buf[len] = '\0';

	if (strncmp(buf, "reset", 5) == 0) {
		if (local->ops->reset_tsf) {
			drv_reset_tsf(local);
			wiphy_info(local->hw.wiphy, "debugfs reset TSF\n");
		}
	} else {
		tsf = simple_strtoul(buf, NULL, 0);
		if (local->ops->set_tsf) {
			drv_set_tsf(local, tsf);
			wiphy_info(local->hw.wiphy,
				   "debugfs set TSF to %#018llx\n", tsf);

		}
	}

	return count;
}
Exemplo n.º 3
0
static void carl9170_dbg_message(struct ar9170 *ar, const char *buf, u32 len)
{
	bool restart = false;
	enum carl9170_restart_reasons reason = CARL9170_RR_NO_REASON;

	if (len > 3) {
		if (memcmp(buf, CARL9170_ERR_MAGIC, 3) == 0) {
			ar->fw.err_counter++;
			if (ar->fw.err_counter > 3) {
				restart = true;
				reason = CARL9170_RR_TOO_MANY_FIRMWARE_ERRORS;
			}
		}

		if (memcmp(buf, CARL9170_BUG_MAGIC, 3) == 0) {
			ar->fw.bug_counter++;
			restart = true;
			reason = CARL9170_RR_FATAL_FIRMWARE_ERROR;
		}
	}

	wiphy_info(ar->hw->wiphy, "FW: %.*s\n", len, buf);

	if (restart)
		carl9170_restart(ar, reason);
}
Exemplo n.º 4
0
static void mwl_tx_ring_cleanup(struct mwl_priv *priv)
{
	int cleaned_tx_desc = 0;
	int num, i;
	struct mwl_desc_data *desc;

	for (num = 0; num < SYSADPT_NUM_OF_DESC_DATA; num++) {
		skb_queue_purge(&priv->txq[num]);
		priv->fw_desc_cnt[num] = 0;

		desc = &priv->desc_data[num];

		if (desc->ptx_ring) {
			for (i = 0; i < SYSADPT_MAX_NUM_TX_DESC; i++) {
				if (!desc->tx_hndl[i].psk_buff)
					continue;

				wiphy_info(priv->hw->wiphy,
					   "unmapped and free'd %i 0x%p 0x%x\n",
					   i,
					   desc->tx_hndl[i].psk_buff->data,
					   le32_to_cpu(
					   desc->ptx_ring[i].pkt_ptr));
				pci_unmap_single(priv->pdev,
						 le32_to_cpu(
						 desc->ptx_ring[i].pkt_ptr),
						 desc->tx_hndl[i].psk_buff->len,
						 PCI_DMA_TODEVICE);
				dev_kfree_skb_any(desc->tx_hndl[i].psk_buff);
				desc->ptx_ring[i].status =
					cpu_to_le32(EAGLE_TXD_STATUS_IDLE);
				desc->ptx_ring[i].pkt_ptr = 0;
				desc->ptx_ring[i].pkt_len = 0;
				desc->tx_hndl[i].psk_buff = NULL;
				cleaned_tx_desc++;
			}
		}
	}

	wiphy_info(priv->hw->wiphy, "cleaned %i TX descr\n", cleaned_tx_desc);
}
static ssize_t ieee80211_if_parse_tsf(
	struct ieee80211_sub_if_data *sdata, const char *buf, int buflen)
{
	struct ieee80211_local *local = sdata->local;
	unsigned long long tsf;
	int ret;
	int tsf_is_delta = 0;

	if (strncmp(buf, "reset", 5) == 0) {
		if (local->ops->reset_tsf) {
			drv_reset_tsf(local, sdata);
			wiphy_info(local->hw.wiphy, "debugfs reset TSF\n");
		}
	} else {
		if (buflen > 10 && buf[1] == '=') {
			if (buf[0] == '+')
				tsf_is_delta = 1;
			else if (buf[0] == '-')
				tsf_is_delta = -1;
			else
				return -EINVAL;
			buf += 2;
		}
		ret = kstrtoull(buf, 10, &tsf);
		if (ret < 0)
			return ret;
		if (tsf_is_delta)
			tsf = drv_get_tsf(local, sdata) + tsf_is_delta * tsf;
		if (local->ops->set_tsf) {
			drv_set_tsf(local, sdata, tsf);
			wiphy_info(local->hw.wiphy,
				   "debugfs set TSF to %#018llx\n", tsf);
		}
	}

	ieee80211_recalc_dtim(local, sdata);
	return buflen;
}
Exemplo n.º 6
0
Arquivo: main.c Projeto: dnlove/maica
void ieee80211_restart_hw(struct ieee80211_hw *hw)
{
	struct ieee80211_local *local = hw_to_local(hw);

	trace_api_restart_hw(local);

	wiphy_info(hw->wiphy,
		   "Hardware restart was requested\n");

	/* use this reason, ieee80211_reconfig will unblock it */
	ieee80211_stop_queues_by_reason(hw,
		IEEE80211_QUEUE_STOP_REASON_SUSPEND);

	schedule_work(&local->restart_work);
}
Exemplo n.º 7
0
int carl9170_echo_test(struct ar9170 *ar, const u32 v)
{
	u32 echores;
	int err;

	err = carl9170_exec_cmd(ar, CARL9170_CMD_ECHO,
				4, (u8 *)&v,
				4, (u8 *)&echores);
	if (err)
		return err;

	if (v != echores) {
		wiphy_info(ar->hw->wiphy, "wrong echo %x != %x", v, echores);
		return -EINVAL;
	}

	return 0;
}
Exemplo n.º 8
0
int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
{
	struct p54_common *priv = dev->priv;
	struct eeprom_pda_wrap *wrap;
	struct pda_entry *entry;
	unsigned int data_len, entry_len;
	void *tmp;
	int err;
	u8 *end = (u8 *)eeprom + len;
	u16 synth = 0;
	u16 crc16 = ~0;

	wrap = (struct eeprom_pda_wrap *) eeprom;
	entry = (void *)wrap->data + le16_to_cpu(wrap->len);

	/* verify that at least the entry length/code fits */
	while ((u8 *)entry <= end - sizeof(*entry)) {
		entry_len = le16_to_cpu(entry->len);
		data_len = ((entry_len - 1) << 1);

		/* abort if entry exceeds whole structure */
		if ((u8 *)entry + sizeof(*entry) + data_len > end)
			break;

		switch (le16_to_cpu(entry->code)) {
		case PDR_MAC_ADDRESS:
			if (data_len != ETH_ALEN)
				break;
			SET_IEEE80211_PERM_ADDR(dev, entry->data);
			break;
		case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
			if (priv->output_limit)
				break;
			err = p54_convert_output_limits(dev, entry->data,
							data_len);
			if (err)
				goto err;
			break;
		case PDR_PRISM_PA_CAL_CURVE_DATA: {
			struct pda_pa_curve_data *curve_data =
				(struct pda_pa_curve_data *)entry->data;
			if (data_len < sizeof(*curve_data)) {
				err = -EINVAL;
				goto err;
			}

			switch (curve_data->cal_method_rev) {
			case 0:
				err = p54_convert_rev0(dev, curve_data);
				break;
			case 1:
				err = p54_convert_rev1(dev, curve_data);
				break;
			default:
				wiphy_err(dev->wiphy,
					  "unknown curve data revision %d\n",
					  curve_data->cal_method_rev);
				err = -ENODEV;
				break;
			}
			if (err)
				goto err;
			}
			break;
		case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
			priv->iq_autocal = kmemdup(entry->data, data_len,
						   GFP_KERNEL);
			if (!priv->iq_autocal) {
				err = -ENOMEM;
				goto err;
			}

			priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
			break;
		case PDR_DEFAULT_COUNTRY:
			p54_parse_default_country(dev, entry->data, data_len);
			break;
		case PDR_INTERFACE_LIST:
			tmp = entry->data;
			while ((u8 *)tmp < entry->data + data_len) {
				struct exp_if *exp_if = tmp;
				if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
					synth = le16_to_cpu(exp_if->variant);
				tmp += sizeof(*exp_if);
			}
			break;
		case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
			if (data_len < 2)
				break;
			priv->version = *(u8 *)(entry->data + 1);
			break;
		case PDR_RSSI_LINEAR_APPROXIMATION:
		case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
		case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
			err = p54_parse_rssical(dev, entry->data, data_len,
						le16_to_cpu(entry->code));
			if (err)
				goto err;
			break;
		case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOMV2: {
			struct pda_custom_wrapper *pda = (void *) entry->data;
			__le16 *src;
			u16 *dst;
			int i;

			if (priv->rssi_db || data_len < sizeof(*pda))
				break;

			priv->rssi_db = p54_convert_db(pda, data_len);
			if (!priv->rssi_db)
				break;

			src = (void *) priv->rssi_db->data;
			dst = (void *) priv->rssi_db->data;

			for (i = 0; i < priv->rssi_db->entries; i++)
				*(dst++) = (s16) le16_to_cpu(*(src++));

			}
			break;
		case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
			struct pda_custom_wrapper *pda = (void *) entry->data;
			if (priv->output_limit || data_len < sizeof(*pda))
				break;
			priv->output_limit = p54_convert_db(pda, data_len);
			}
			break;
		case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
			struct pda_custom_wrapper *pda = (void *) entry->data;
			if (priv->curve_data || data_len < sizeof(*pda))
				break;
			priv->curve_data = p54_convert_db(pda, data_len);
			}
			break;
		case PDR_END:
			crc16 = ~crc_ccitt(crc16, (u8 *) entry, sizeof(*entry));
			if (crc16 != le16_to_cpup((__le16 *)entry->data)) {
				wiphy_err(dev->wiphy, "eeprom failed checksum "
					 "test!\n");
				err = -ENOMSG;
				goto err;
			} else {
				goto good_eeprom;
			}
			break;
		default:
			break;
		}

		crc16 = crc_ccitt(crc16, (u8 *)entry, (entry_len + 1) * 2);
		entry = (void *)entry + (entry_len + 1) * 2;
	}

	wiphy_err(dev->wiphy, "unexpected end of eeprom data.\n");
	err = -ENODATA;
	goto err;

good_eeprom:
	if (!synth || !priv->iq_autocal || !priv->output_limit ||
	    !priv->curve_data) {
		wiphy_err(dev->wiphy,
			  "not all required entries found in eeprom!\n");
		err = -EINVAL;
		goto err;
	}

	err = p54_generate_channel_lists(dev);
	if (err)
		goto err;

	priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
	if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
		p54_init_xbow_synth(priv);
	if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
		dev->wiphy->bands[IEEE80211_BAND_2GHZ] =
			priv->band_table[IEEE80211_BAND_2GHZ];
	if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
		dev->wiphy->bands[IEEE80211_BAND_5GHZ] =
			priv->band_table[IEEE80211_BAND_5GHZ];
	if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
		priv->rx_diversity_mask = 3;
	if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
		priv->tx_diversity_mask = 3;

	if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
		u8 perm_addr[ETH_ALEN];

		wiphy_warn(dev->wiphy,
			   "Invalid hwaddr! Using randomly generated MAC addr\n");
		random_ether_addr(perm_addr);
		SET_IEEE80211_PERM_ADDR(dev, perm_addr);
	}

	priv->cur_rssi = &p54_rssi_default;

	wiphy_info(dev->wiphy, "hwaddr %pM, MAC:isl38%02x RF:%s\n",
		   dev->wiphy->perm_addr, priv->version,
		   p54_rf_chips[priv->rxhw]);

	return 0;

err:
	kfree(priv->iq_autocal);
	kfree(priv->output_limit);
	kfree(priv->curve_data);
	kfree(priv->rssi_db);
	priv->iq_autocal = NULL;
	priv->output_limit = NULL;
	priv->curve_data = NULL;
	priv->rssi_db = NULL;

	wiphy_err(dev->wiphy, "eeprom parse failed!\n");
	return err;
}
Exemplo n.º 9
0
static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	void __iomem *mem;
	struct ath_softc *sc;
	struct ieee80211_hw *hw;
	u8 csz;
	u32 val;
	int ret = 0;
	char hw_name[64];

	if (pci_enable_device(pdev))
		return -EIO;

	ret =  pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
	if (ret) {
		printk(KERN_ERR "ath9k: 32-bit DMA not available\n");
		goto err_dma;
	}

	ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
	if (ret) {
		printk(KERN_ERR "ath9k: 32-bit DMA consistent "
			"DMA enable failed\n");
		goto err_dma;
	}

	/*
	 * Cache line size is used to size and align various
	 * structures used to communicate with the hardware.
	 */
	pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
	if (csz == 0) {
		/*
		 * Linux 2.4.18 (at least) writes the cache line size
		 * register as a 16-bit wide register which is wrong.
		 * We must have this setup properly for rx buffer
		 * DMA to work so force a reasonable value here if it
		 * comes up zero.
		 */
		csz = L1_CACHE_BYTES / sizeof(u32);
		pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
	}
	/*
	 * The default setting of latency timer yields poor results,
	 * set it to the value used by other systems. It may be worth
	 * tweaking this setting more.
	 */
	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);

	pci_set_master(pdev);

	/*
	 * Disable the RETRY_TIMEOUT register (0x41) to keep
	 * PCI Tx retries from interfering with C3 CPU state.
	 */
	pci_read_config_dword(pdev, 0x40, &val);
	if ((val & 0x0000ff00) != 0)
		pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);

	ret = pci_request_region(pdev, 0, "ath9k");
	if (ret) {
		dev_err(&pdev->dev, "PCI memory region reserve error\n");
		ret = -ENODEV;
		goto err_region;
	}

	mem = pci_iomap(pdev, 0, 0);
	if (!mem) {
		printk(KERN_ERR "PCI memory map error\n") ;
		ret = -EIO;
		goto err_iomap;
	}

	hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
	if (!hw) {
		dev_err(&pdev->dev, "No memory for ieee80211_hw\n");
		ret = -ENOMEM;
		goto err_alloc_hw;
	}

	SET_IEEE80211_DEV(hw, &pdev->dev);
	pci_set_drvdata(pdev, hw);

	sc = hw->priv;
	sc->hw = hw;
	sc->dev = &pdev->dev;
	sc->mem = mem;

	/* Will be cleared in ath9k_start() */
	sc->sc_flags |= SC_OP_INVALID;

	ret = request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath9k", sc);
	if (ret) {
		dev_err(&pdev->dev, "request_irq failed\n");
		goto err_irq;
	}

	sc->irq = pdev->irq;

	ret = ath9k_init_device(id->device, sc, &ath_pci_bus_ops);
	if (ret) {
		dev_err(&pdev->dev, "Failed to initialize device\n");
		goto err_init;
	}

	ath9k_hw_name(sc->sc_ah, hw_name, sizeof(hw_name));
	wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
		   hw_name, (unsigned long)mem, pdev->irq);

	return 0;

err_init:
	free_irq(sc->irq, sc);
err_irq:
	ieee80211_free_hw(hw);
err_alloc_hw:
	pci_iounmap(pdev, mem);
err_iomap:
	pci_release_region(pdev, 0);
err_region:
	/* Nothing */
err_dma:
	pci_disable_device(pdev);
	return ret;
}
Exemplo n.º 10
0
void carl9170_handle_command_response(struct ar9170 *ar, void *buf, u32 len)
{
	struct carl9170_rsp *cmd = (void *) buf;
	struct ieee80211_vif *vif;

	if (carl9170_check_sequence(ar, cmd->hdr.seq))
		return;

	if ((cmd->hdr.cmd & CARL9170_RSP_FLAG) != CARL9170_RSP_FLAG) {
		if (!(cmd->hdr.cmd & CARL9170_CMD_ASYNC_FLAG))
			carl9170_cmd_callback(ar, len, buf);

		return;
	}

	if (unlikely(cmd->hdr.len != (len - 4))) {
		if (net_ratelimit()) {
			wiphy_err(ar->hw->wiphy, "FW: received over-/under"
				"sized event %x (%d, but should be %d).\n",
			       cmd->hdr.cmd, cmd->hdr.len, len - 4);

			print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE,
					     buf, len);
		}

		return;
	}

	/* hardware event handlers */
	switch (cmd->hdr.cmd) {
	case CARL9170_RSP_PRETBTT:
		/* pre-TBTT event */
		rcu_read_lock();
		vif = carl9170_get_main_vif(ar);

		if (!vif) {
			rcu_read_unlock();
			break;
		}

		switch (vif->type) {
		case NL80211_IFTYPE_STATION:
			carl9170_handle_ps(ar, cmd);
			break;

		case NL80211_IFTYPE_AP:
		case NL80211_IFTYPE_ADHOC:
			carl9170_update_beacon(ar, true);
			break;

		default:
			break;
		}
		rcu_read_unlock();

		break;


	case CARL9170_RSP_TXCOMP:
		/* TX status notification */
		carl9170_tx_process_status(ar, cmd);
		break;

	case CARL9170_RSP_BEACON_CONFIG:
		/*
		 * (IBSS) beacon send notification
		 * bytes: 04 c2 XX YY B4 B3 B2 B1
		 *
		 * XX always 80
		 * YY always 00
		 * B1-B4 "should" be the number of send out beacons.
		 */
		break;

	case CARL9170_RSP_ATIM:
		/* End of Atim Window */
		break;

	case CARL9170_RSP_WATCHDOG:
		/* Watchdog Interrupt */
		carl9170_restart(ar, CARL9170_RR_WATCHDOG);
		break;

	case CARL9170_RSP_TEXT:
		/* firmware debug */
		carl9170_dbg_message(ar, (char *)buf + 4, len - 4);
		break;

	case CARL9170_RSP_HEXDUMP:
		wiphy_dbg(ar->hw->wiphy, "FW: HD %d\n", len - 4);
		print_hex_dump_bytes("FW:", DUMP_PREFIX_NONE,
				     (char *)buf + 4, len - 4);
		break;

	case CARL9170_RSP_RADAR:
		if (!net_ratelimit())
			break;

		wiphy_info(ar->hw->wiphy, "FW: RADAR! Please report this "
		       "incident to [email protected] !\n");
		break;

	case CARL9170_RSP_GPIO:
#ifdef CONFIG_CARL9170_WPC
		if (ar->wps.pbc) {
			bool state = !!(cmd->gpio.gpio & cpu_to_le32(
				AR9170_GPIO_PORT_WPS_BUTTON_PRESSED));

			if (state != ar->wps.pbc_state) {
				ar->wps.pbc_state = state;
				input_report_key(ar->wps.pbc, KEY_WPS_BUTTON,
						 state);
				input_sync(ar->wps.pbc);
			}
		}
#endif /* CONFIG_CARL9170_WPC */
		break;

	case CARL9170_RSP_BOOT:
		complete(&ar->fw_boot_wait);
		break;

	default:
		wiphy_err(ar->hw->wiphy, "FW: received unhandled event %x\n",
			cmd->hdr.cmd);
		print_hex_dump_bytes("dump:", DUMP_PREFIX_NONE, buf, len);
		break;
	}
}
Exemplo n.º 11
0
int mwl_fwdl_download_firmware(struct ieee80211_hw *hw)
{
	struct mwl_priv *priv = hw->priv;
	const struct firmware *fw;
	u32 curr_iteration = 0;
	u32 size_fw_downloaded = 0;
	u32 int_code = 0;
	u32 len = 0;

	fw = priv->fw_ucode;

	mwl_fwcmd_reset(hw);

	/* FW before jumping to boot rom, it will enable PCIe transaction retry,
	 * wait for boot code to stop it.
	 */
	mdelay(FW_CHECK_MSECS);

	writel(MACREG_A2HRIC_BIT_MASK,
	       priv->iobase1 + MACREG_REG_A2H_INTERRUPT_CLEAR_SEL);
	writel(0x00, priv->iobase1 + MACREG_REG_A2H_INTERRUPT_CAUSE);
	writel(0x00, priv->iobase1 + MACREG_REG_A2H_INTERRUPT_MASK);
	writel(MACREG_A2HRIC_BIT_MASK,
	       priv->iobase1 + MACREG_REG_A2H_INTERRUPT_STATUS_MASK);

	/* this routine interacts with SC2 bootrom to download firmware binary
	 * to the device. After DMA'd to SC2, the firmware could be deflated to
	 * reside on its respective blocks such as ITCM, DTCM, SQRAM,
	 * (or even DDR, AFTER DDR is init'd before fw download
	 */
	wiphy_info(hw->wiphy, "fw download start 88\n");

	/* Disable PFU before FWDL */
	writel(0x100, priv->iobase1 + 0xE0E4);

	/* make sure SCRATCH2 C40 is clear, in case we are too quick */
	while (readl(priv->iobase1 + 0xc40) == 0)
		;

	while (size_fw_downloaded < fw->size) {
		len = readl(priv->iobase1 + 0xc40);

		if (!len)
			break;

		/* this copies the next chunk of fw binary to be delivered */
		memcpy((char *)&priv->pcmd_buf[0],
		       (fw->data + size_fw_downloaded), len);

		/* this function writes pdata to c10, then write 2 to c18 */
		mwl_fwdl_trig_pcicmd_bootcode(priv);

		/* this is arbitrary per your platform; we use 0xffff */
		curr_iteration = FW_MAX_NUM_CHECKS;

		/* NOTE: the following back to back checks on C1C is time
		 * sensitive, hence may need to be tweaked dependent on host
		 * processor. Time for SC2 to go from the write of event 2 to
		 * C1C == 2 is ~1300 nSec. Hence the checkings on host has to
		 * consider how efficient your code can be to meet this timing,
		 * or you can alternatively tweak this routines to fit your
		 * platform
		 */
		do {
			int_code = readl(priv->iobase1 + 0xc1c);
			if (int_code != 0)
				break;
			curr_iteration--;
		} while (curr_iteration);

		do {
			int_code = readl(priv->iobase1 + 0xc1c);
			if ((int_code & MACREG_H2ARIC_BIT_DOOR_BELL) !=
			    MACREG_H2ARIC_BIT_DOOR_BELL)
				break;
			curr_iteration--;
		} while (curr_iteration);

		if (curr_iteration == 0) {
			/* This limited loop check allows you to exit gracefully
			 * without locking up your entire system just because fw
			 * download failed
			 */
			wiphy_err(hw->wiphy,
				  "Exhausted curr_iteration for fw download\n");
			goto err_download;
		}

		size_fw_downloaded += len;
	}

	wiphy_info(hw->wiphy,
		   "FwSize = %d downloaded Size = %d curr_iteration %d\n",
		   (int)fw->size, size_fw_downloaded, curr_iteration);

	/* Now firware is downloaded successfully, so this part is to check
	 * whether fw can properly execute to an extent that write back
	 * signature to indicate its readiness to the host. NOTE: if your
	 * downloaded fw crashes, this signature checking will fail. This
	 * part is similar as SC1
	 */
	*((u32 *)&priv->pcmd_buf[1]) = 0;
	mwl_fwdl_trig_pcicmd(priv);
	curr_iteration = FW_MAX_NUM_CHECKS;
	do {
		curr_iteration--;
		writel(HOSTCMD_SOFTAP_MODE, priv->iobase1 + MACREG_REG_GEN_PTR);
		mdelay(FW_CHECK_MSECS);
		int_code = readl(priv->iobase1 + MACREG_REG_INT_CODE);
		if (!(curr_iteration % 0xff))
			wiphy_err(hw->wiphy, "%x;", int_code);
	} while ((curr_iteration) &&
		 (int_code != HOSTCMD_SOFTAP_FWRDY_SIGNATURE));

	if (curr_iteration == 0) {
		wiphy_err(hw->wiphy,
			  "Exhausted curr_iteration for fw signature\n");
		goto err_download;
	}

	wiphy_info(hw->wiphy, "complete\n");
	writel(0x00, priv->iobase1 + MACREG_REG_INT_CODE);

	return 0;

err_download:

	mwl_fwcmd_reset(hw);

	return -EIO;
}