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Commit 57d7cca6 authored by Yue Ma's avatar Yue Ma
Browse files

cnss2: Support runtime power on/off WLAN device 



WLAN host driver may do runtime mode switch which requires platform
driver to reset device and re-download firmware. Add the changes for
runtime power on/off WLAN device to support runtime mode switch.

Change-Id: I08d3635afbaafb73691fbdf5d25877fb433bae18
CRs-fixed: 2059087
Signed-off-by: default avatarYue Ma <yuem@codeaurora.org>
parent 66424ee9

drivers/net/wireless/cnss2/main.c

+96 −65
Original line number Diff line number Diff line
@@ -573,7 +573,7 @@ static int cnss_driver_call_probe(struct cnss_plat_data *plat_priv) 
	struct cnss_pci_data *pci_priv = plat_priv->bus_priv;



	if (!plat_priv->driver_ops) {

		cnss_pr_err("driver_ops is NULL!");

		cnss_pr_err("driver_ops is NULL\n");

		ret = -EINVAL;

		goto out;

	}
@@ -587,7 +587,7 @@ static int cnss_driver_call_probe(struct cnss_plat_data *plat_priv) 
			goto out;

		}

		clear_bit(CNSS_DRIVER_RECOVERY, &plat_priv->driver_state);

	} else {

	} else if (test_bit(CNSS_DRIVER_LOADING, &plat_priv->driver_state)) {

		ret = plat_priv->driver_ops->probe(pci_priv->pci_dev,

						   pci_priv->pci_device_id);

		if (ret) {
@@ -605,6 +605,25 @@ out: 
	return ret;

}



static int cnss_driver_call_remove(struct cnss_plat_data *plat_priv)

{

	struct cnss_pci_data *pci_priv = plat_priv->bus_priv;



	if (!plat_priv->driver_ops) {

		cnss_pr_err("driver_ops is NULL\n");

		return -EINVAL;

	}



	if (test_bit(CNSS_DRIVER_RECOVERY, &plat_priv->driver_state)) {

		plat_priv->driver_ops->shutdown(pci_priv->pci_dev);

	} else if (test_bit(CNSS_DRIVER_UNLOADING, &plat_priv->driver_state)) {

		plat_priv->driver_ops->remove(pci_priv->pci_dev);

		clear_bit(CNSS_DRIVER_PROBED, &plat_priv->driver_state);

	}



	return 0;

}



static int cnss_fw_ready_hdlr(struct cnss_plat_data *plat_priv)

{

	int ret = 0;
@@ -626,8 +645,11 @@ static int cnss_fw_ready_hdlr(struct cnss_plat_data *plat_priv) 
	} else if (test_bit(CNSS_COLD_BOOT_CAL, &plat_priv->driver_state)) {

		ret = cnss_wlfw_wlan_mode_send_sync(plat_priv,

						    QMI_WLFW_CALIBRATION_V01);

	} else {

	} else if (test_bit(CNSS_DRIVER_LOADING, &plat_priv->driver_state) ||

		   test_bit(CNSS_DRIVER_RECOVERY, &plat_priv->driver_state)) {

		ret = cnss_driver_call_probe(plat_priv);

	} else {

		complete(&plat_priv->power_up_complete);

	}



	if (ret)
@@ -668,6 +690,10 @@ static char *cnss_driver_event_to_str(enum cnss_driver_event_type type) 
		return "RECOVERY";

	case CNSS_DRIVER_EVENT_FORCE_FW_ASSERT:

		return "FORCE_FW_ASSERT";

	case CNSS_DRIVER_EVENT_POWER_UP:

		return "POWER_UP";

	case CNSS_DRIVER_EVENT_POWER_DOWN:

		return "POWER_DOWN";

	case CNSS_DRIVER_EVENT_MAX:

		return "EVENT_MAX";

	}
@@ -746,64 +772,57 @@ out: 
int cnss_power_up(struct device *dev)

{

	int ret = 0;

	void *bus_priv = cnss_bus_dev_to_bus_priv(dev);

	struct cnss_plat_data *plat_priv = cnss_bus_dev_to_plat_priv(dev);

	unsigned int timeout;



	if (!bus_priv || !plat_priv)

	if (!plat_priv) {

		cnss_pr_err("plat_priv is NULL\n");

		return -ENODEV;



	if (plat_priv->device_id != QCA6174_DEVICE_ID) {

		cnss_pr_dbg("Power up is not supported for device ID 0x%lx\n",

			    plat_priv->device_id);

		return 0;

	}



	ret = cnss_power_on_device(plat_priv);

	if (ret) {

		cnss_pr_err("Failed to power on device, err = %d\n", ret);

		goto err_power_on;

	}

	cnss_pr_dbg("Powering up device\n");



	ret = cnss_resume_pci_link(bus_priv);

	if (ret) {

		cnss_pr_err("Failed to resume PCI link, err = %d\n", ret);

		goto err_resume_link;

	ret = cnss_driver_event_post(plat_priv,

				     CNSS_DRIVER_EVENT_POWER_UP,

				     true, NULL);

	if (ret)

		goto out;



	if (plat_priv->device_id == QCA6174_DEVICE_ID)

		goto out;



	timeout = cnss_get_qmi_timeout();



	reinit_completion(&plat_priv->power_up_complete);

	ret = wait_for_completion_timeout(&plat_priv->power_up_complete,

					  msecs_to_jiffies(timeout) << 2);

	if (!ret) {

		cnss_pr_err("Timeout waiting for power up to complete\n");

		ret = -EAGAIN;

		goto out;

	}



	return 0;

err_resume_link:

	cnss_power_off_device(plat_priv);

err_power_on:



out:

	return ret;

}

EXPORT_SYMBOL(cnss_power_up);



int cnss_power_down(struct device *dev)

{

	int ret = 0;

	void *bus_priv = cnss_bus_dev_to_bus_priv(dev);

	struct cnss_plat_data *plat_priv = cnss_bus_dev_to_plat_priv(dev);



	if (!bus_priv || !plat_priv)

	if (!plat_priv) {

		cnss_pr_err("plat_priv is NULL\n");

		return -ENODEV;



	if (plat_priv->device_id != QCA6174_DEVICE_ID) {

		cnss_pr_dbg("Power down is not supported for device ID 0x%lx\n",

			    plat_priv->device_id);

		return 0;

	}



	cnss_request_bus_bandwidth(CNSS_BUS_WIDTH_NONE);

	cnss_pci_set_monitor_wake_intr(bus_priv, false);

	cnss_pci_set_auto_suspended(bus_priv, 0);

	cnss_pr_dbg("Powering down device\n");



	ret = cnss_suspend_pci_link(bus_priv);

	if (ret)

		cnss_pr_err("Failed to suspend PCI link, err = %d\n", ret);



	cnss_power_off_device(plat_priv);



	return 0;

	return cnss_driver_event_post(plat_priv,

				      CNSS_DRIVER_EVENT_POWER_DOWN,

				      true, NULL);

}

EXPORT_SYMBOL(cnss_power_down);
@@ -1024,14 +1043,11 @@ static int cnss_qca6174_shutdown(struct cnss_plat_data *plat_priv) 
	if (!plat_priv->driver_ops)

		return -EINVAL;



	if (test_bit(CNSS_DRIVER_UNLOADING, &plat_priv->driver_state)) {

	cnss_driver_call_remove(plat_priv);



	cnss_request_bus_bandwidth(CNSS_BUS_WIDTH_NONE);

		plat_priv->driver_ops->remove(pci_priv->pci_dev);

	cnss_pci_set_monitor_wake_intr(pci_priv, false);

	cnss_pci_set_auto_suspended(pci_priv, 0);

	} else {

		plat_priv->driver_ops->shutdown(pci_priv->pci_dev);

	}



	ret = cnss_suspend_pci_link(pci_priv);

	if (ret)
@@ -1039,10 +1055,7 @@ static int cnss_qca6174_shutdown(struct cnss_plat_data *plat_priv) 


	cnss_power_off_device(plat_priv);



	if (test_bit(CNSS_DRIVER_UNLOADING, &plat_priv->driver_state)) {

	clear_bit(CNSS_DRIVER_UNLOADING, &plat_priv->driver_state);

		clear_bit(CNSS_DRIVER_PROBED, &plat_priv->driver_state);

	}



	return ret;

}
@@ -1134,16 +1147,13 @@ static int cnss_qca6290_shutdown(struct cnss_plat_data *plat_priv) 
	if (!plat_priv->driver_ops)

		return -EINVAL;



	if (test_bit(CNSS_DRIVER_UNLOADING, &plat_priv->driver_state)) {

	cnss_driver_call_remove(plat_priv);



skip_driver_remove:

	cnss_request_bus_bandwidth(CNSS_BUS_WIDTH_NONE);

		plat_priv->driver_ops->remove(pci_priv->pci_dev);

	cnss_pci_set_monitor_wake_intr(pci_priv, false);

	cnss_pci_set_auto_suspended(pci_priv, 0);

	} else {

		plat_priv->driver_ops->shutdown(pci_priv->pci_dev);

	}



skip_driver_remove:

	cnss_pci_stop_mhi(pci_priv);



	ret = cnss_suspend_pci_link(pci_priv);
@@ -1154,11 +1164,7 @@ skip_driver_remove: 


	clear_bit(CNSS_FW_READY, &plat_priv->driver_state);

	clear_bit(CNSS_FW_MEM_READY, &plat_priv->driver_state);



	if (test_bit(CNSS_DRIVER_UNLOADING, &plat_priv->driver_state)) {

	clear_bit(CNSS_DRIVER_UNLOADING, &plat_priv->driver_state);

		clear_bit(CNSS_DRIVER_PROBED, &plat_priv->driver_state);

	}



	return ret;

}
@@ -1661,6 +1667,22 @@ static int cnss_cold_boot_cal_done_hdlr(struct cnss_plat_data *plat_priv) 
	return 0;

}



static int cnss_power_up_hdlr(struct cnss_plat_data *plat_priv)

{

	struct cnss_subsys_info *subsys_info = &plat_priv->subsys_info;



	return cnss_powerup(&subsys_info->subsys_desc);

}



static int cnss_power_down_hdlr(struct cnss_plat_data *plat_priv)

{

	struct cnss_subsys_info *subsys_info = &plat_priv->subsys_info;



	cnss_shutdown(&subsys_info->subsys_desc, false);



	return 0;

}



static void cnss_driver_event_work(struct work_struct *work)

{

	struct cnss_plat_data *plat_priv =
@@ -1728,6 +1750,12 @@ static void cnss_driver_event_work(struct work_struct *work) 
		case CNSS_DRIVER_EVENT_FORCE_FW_ASSERT:

			ret = cnss_force_fw_assert_hdlr(plat_priv);

			break;

		case CNSS_DRIVER_EVENT_POWER_UP:

			ret = cnss_power_up_hdlr(plat_priv);

			break;

		case CNSS_DRIVER_EVENT_POWER_DOWN:

			ret = cnss_power_down_hdlr(plat_priv);

			break;

		default:

			cnss_pr_err("Invalid driver event type: %d",

				    event->type);
@@ -2226,6 +2254,8 @@ static int cnss_probe(struct platform_device *plat_dev) 
		cnss_pr_err("Failed to init platform device wakeup source, err = %d\n",

			    ret);



	init_completion(&plat_priv->power_up_complete);



	cnss_pr_info("Platform driver probed successfully.\n");



	return 0;
@@ -2257,6 +2287,7 @@ static int cnss_remove(struct platform_device *plat_dev) 
{

	struct cnss_plat_data *plat_priv = platform_get_drvdata(plat_dev);



	complete_all(&plat_priv->power_up_complete);

	device_init_wakeup(&plat_dev->dev, false);

	unregister_pm_notifier(&cnss_pm_notifier);

	del_timer(&plat_priv->fw_boot_timer);

drivers/net/wireless/cnss2/main.h

+3 −0
Original line number Diff line number Diff line
@@ -126,6 +126,8 @@ enum cnss_driver_event_type { 
	CNSS_DRIVER_EVENT_UNREGISTER_DRIVER,

	CNSS_DRIVER_EVENT_RECOVERY,

	CNSS_DRIVER_EVENT_FORCE_FW_ASSERT,

	CNSS_DRIVER_EVENT_POWER_UP,

	CNSS_DRIVER_EVENT_POWER_DOWN,

	CNSS_DRIVER_EVENT_MAX,

};
@@ -201,6 +203,7 @@ struct cnss_plat_data { 
	struct dentry *root_dentry;

	atomic_t pm_count;

	struct timer_list fw_boot_timer;

	struct completion power_up_complete;

};



void *cnss_bus_dev_to_bus_priv(struct device *dev);