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Commit eef4716a authored by Komal Seelam's avatar Komal Seelam
Browse files

cnss-sdio: Maintain the HW states for debugging 



To Save Power, SDIO HW resources are released after cold boot
and driver unload and acquired when driver is loaded.
Track the HW state for debugging purposes.

CRs-Fixed: 1065029
Change-Id: I23a66dd7aa6445df5e142b60859566ac388f222d
Signed-off-by: default avatarKomal Seelam <kseelam@codeaurora.org>
parent 1299ca69

drivers/net/wireless/cnss/cnss_sdio.c

+23 −2
Original line number Diff line number Diff line
@@ -54,6 +54,9 @@ 
#define CNSS_PINCTRL_SLEEP_STATE	"sleep"

#define CNSS_PINCTRL_ACTIVE_STATE	"active"



#define CNSS_HW_SLEEP 0

#define CNSS_HW_ACTIVE 1



struct cnss_sdio_regulator {

	struct regulator *wlan_io;

	struct regulator *wlan_xtal;
@@ -69,6 +72,7 @@ struct cnss_sdio_info { 
	struct device *dev;

	const struct sdio_device_id *id;

	bool skip_wlan_en_toggle;

	bool cnss_hw_state;

};



struct cnss_ssr_info {
@@ -236,6 +240,11 @@ static int cnss_put_hw_resources(struct device *dev) 
		return 0;

	}



	if (info->cnss_hw_state == CNSS_HW_SLEEP) {

		pr_debug("HW resources are already released\n");

		return 0;

	}



	host = info->host;



	if (!host) {
@@ -256,6 +265,7 @@ static int cnss_put_hw_resources(struct device *dev) 
	}



	regulator_disable(cnss_pdata->regulator.wlan_vreg);

	info->cnss_hw_state = CNSS_HW_SLEEP;



	return ret;

}
@@ -276,6 +286,11 @@ static int cnss_get_hw_resources(struct device *dev) 
		return 0;

	}



	if (info->cnss_hw_state == CNSS_HW_ACTIVE) {

		pr_debug("HW resources are already active\n");

		return 0;

	}



	host = info->host;



	if (!host) {
@@ -299,8 +314,10 @@ static int cnss_get_hw_resources(struct device *dev) 
		pr_err("Failed to restore host power ret:%d\n",

		       ret);

		regulator_disable(cnss_pdata->regulator.wlan_vreg);

		return ret;

	}



	info->cnss_hw_state = CNSS_HW_ACTIVE;

	return ret;

}
@@ -853,9 +870,11 @@ int cnss_sdio_wlan_register_driver(struct cnss_sdio_wlan_driver *driver) 
	error = cnss_set_pinctrl_state(cnss_pdata, PINCTRL_ACTIVE);

	if (error) {

		pr_err("Fail to set pinctrl to active state\n");

		cnss_put_hw_resources(dev);

		goto put_hw;

	}



	/* The HW resources are released in unregister logic if probe fails */

	error = driver->probe ? driver->probe(cnss_info->func,

					      cnss_info->id) : error;

	if (error) {
@@ -868,7 +887,6 @@ int cnss_sdio_wlan_register_driver(struct cnss_sdio_wlan_driver *driver) 
pinctrl_sleep:

	cnss_set_pinctrl_state(cnss_pdata, PINCTRL_SLEEP);

put_hw:

	cnss_put_hw_resources(dev);

	return error;

}

EXPORT_SYMBOL(cnss_sdio_wlan_register_driver);
@@ -967,7 +985,8 @@ static int cnss_sdio_wlan_init(void) 
	if (error)

		pr_err("registered fail error=%d\n", error);

	else

		pr_debug("registered succ\n");

		pr_debug("registered success\n");



	return error;

}
@@ -1269,6 +1288,7 @@ static int cnss_sdio_probe(struct platform_device *pdev) 


	info->skip_wlan_en_toggle = of_property_read_bool(dev->of_node,

							  "qcom,skip-wlan-en-toggle");

	info->cnss_hw_state = CNSS_HW_ACTIVE;



	error = cnss_sdio_wlan_init();

	if (error) {
@@ -1309,6 +1329,7 @@ err_subsys_init: 
err_ramdump_create:

	cnss_sdio_wlan_exit();

err_wlan_dsrc_enable_regulator:

	info->cnss_hw_state = CNSS_HW_SLEEP;

	regulator_put(cnss_pdata->regulator.wlan_vreg_dsrc);

err_wlan_enable_regulator:

	regulator_put(cnss_pdata->regulator.wlan_xtal);