cnss2: make sure wlan_en is low when power up

Some auto HW can't guarantee wlan_en low state when powerup.
Add a macro to enable initializing wlan_en state.

Change-Id: I6755bcd49c78f7bb9931f80cb385e62177ebe603
CRs-Fixed: 3355148

Kbuild

@@ -36,6 +36,10 @@ ifeq ($(CONFIG_CNSS2_CONDITIONAL_POWEROFF),y)
 KBUILD_CPPFLAGS += -DCONFIG_CNSS2_CONDITIONAL_POWEROFF
 endif
 
+ifeq ($(CONFIG_AUTO_PROJECT),y)
+KBUILD_CPPFLAGS += -DCONFIG_PULLDOWN_WLANEN
+endif
+
 obj-$(CONFIG_CNSS2) += cnss2/
 obj-$(CONFIG_ICNSS2) += icnss2/
 obj-$(CONFIG_CNSS_GENL) += cnss_genl/

cnss2/debug.c

@@ -223,7 +223,7 @@ static ssize_t cnss_dev_boot_debug_write(struct file *fp,
 	cnss_pr_dbg("Received dev_boot debug command: %s\n", cmd);
 
 	if (sysfs_streq(cmd, "on")) {
-		ret = cnss_power_on_device(plat_priv);
+		ret = cnss_power_on_device(plat_priv, false);
 	} else if (sysfs_streq(cmd, "off")) {
 		cnss_power_off_device(plat_priv);
 	} else if (sysfs_streq(cmd, "enumerate")) {

cnss2/main.c

@@ -4184,7 +4184,7 @@ static int cnss_wlan_device_init(struct cnss_plat_data *plat_priv)
 		return 0;
 
 retry:
-	ret = cnss_power_on_device(plat_priv);
+	ret = cnss_power_on_device(plat_priv, true);
 	if (ret)
 		goto end;
 

cnss2/main.h

@@ -614,7 +614,7 @@ int cnss_vreg_unvote_type(struct cnss_plat_data *plat_priv,
 			  enum cnss_vreg_type type);
 int cnss_get_pinctrl(struct cnss_plat_data *plat_priv);
 int cnss_get_wlan_sw_ctrl(struct cnss_plat_data *plat_priv);
-int cnss_power_on_device(struct cnss_plat_data *plat_priv);
+int cnss_power_on_device(struct cnss_plat_data *plat_priv, bool reset);
 void cnss_power_off_device(struct cnss_plat_data *plat_priv);
 bool cnss_is_device_powered_on(struct cnss_plat_data *plat_priv);
 int cnss_enable_dev_sol_irq(struct cnss_plat_data *plat_priv);

cnss2/pci.c

@@ -2594,7 +2594,7 @@ static int cnss_qca6174_powerup(struct cnss_pci_data *pci_priv)
 	int ret = 0;
 	struct cnss_plat_data *plat_priv = pci_priv->plat_priv;
 
-	ret = cnss_power_on_device(plat_priv);
+	ret = cnss_power_on_device(plat_priv, false);
 	if (ret) {
 		cnss_pr_err("Failed to power on device, err = %d\n", ret);
 		goto out;
@@ -2704,7 +2704,7 @@ static int cnss_qca6290_powerup(struct cnss_pci_data *pci_priv)
 
 	cnss_get_driver_mode_update_fw_name(plat_priv);
 retry:
-	ret = cnss_power_on_device(plat_priv);
+	ret = cnss_power_on_device(plat_priv, false);
 	if (ret) {
 		cnss_pr_err("Failed to power on device, err = %d\n", ret);
 		goto out;

cnss2/power.c

@@ -1112,7 +1112,7 @@ int cnss_get_input_gpio_value(struct cnss_plat_data *plat_priv, int gpio_num)
 	return gpio_get_value(gpio_num);
 }
 
-int cnss_power_on_device(struct cnss_plat_data *plat_priv)
+int cnss_power_on_device(struct cnss_plat_data *plat_priv, bool reset)
 {
 	int ret = 0;
 
@@ -1139,6 +1139,26 @@ int cnss_power_on_device(struct cnss_plat_data *plat_priv)
 		goto vreg_off;
 	}
 
+#ifdef CONFIG_PULLDOWN_WLANEN
+	if (reset) {
+		/* The default state of wlan_en maybe not low,
+		 * according to datasheet, we should put wlan_en
+		 * to low first, and trigger high.
+		 * And the default delay for qca6390 is at least 4ms,
+		 * for qcn7605/qca6174, it is 10us. For safe, set 5ms delay
+		 * here.
+		 */
+		ret = cnss_select_pinctrl_state(plat_priv, false);
+		if (ret) {
+			cnss_pr_err("Failed to select pinctrl state, err = %d\n",
+				    ret);
+			goto clk_off;
+		}
+
+		usleep_range(4000, 5000);
+	}
+#endif
+
 	ret = cnss_select_pinctrl_enable(plat_priv);
 	if (ret) {
 		cnss_pr_err("Failed to select pinctrl state, err = %d\n", ret);
@@ -1796,6 +1816,5 @@ int cnss_dev_specific_power_on(struct cnss_plat_data *plat_priv)
 		return ret;
 
 	plat_priv->powered_on = false;
-	return cnss_power_on_device(plat_priv);
-
+	return cnss_power_on_device(plat_priv, false);
 }