bcmdhd.101.10.361.x/dhd_custom_hikey.c - manifest_repos/dhd-driver - Git at Google

 /*
  * Platform Dependent file for Hikey
  *
  * Copyright (C) 2020, Broadcom.
  *
  *      Unless you and Broadcom execute a separate written software license
  * agreement governing use of this software, this software is licensed to you
  * under the terms of the GNU General Public License version 2 (the "GPL"),
  * available at http://www.broadcom.com/licenses/GPLv2.php, with the
  * following added to such license:
  *
  *      As a special exception, the copyright holders of this software give you
  * permission to link this software with independent modules, and to copy and
  * distribute the resulting executable under terms of your choice, provided that
  * you also meet, for each linked independent module, the terms and conditions of
  * the license of that module.  An independent module is a module which is not
  * derived from this software.  The special exception does not apply to any
  * modifications of the software.
  *
  *
  * <<Broadcom-WL-IPTag/Open:>>
  *
  * $Id$
  *
  */

 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
 #include <linux/skbuff.h>
 #include <linux/fcntl.h>
 #include <linux/fs.h>
 #include <linux/of_gpio.h>
 #ifdef CONFIG_WIFI_CONTROL_FUNC
 #include <linux/wlan_plat.h>
 #else
 #include <dhd_plat.h>
 #endif /* CONFIG_WIFI_CONTROL_FUNC */
 #include <dhd_dbg.h>
 #include <dhd.h>

 #ifdef CONFIG_BROADCOM_WIFI_RESERVED_MEM
 extern int dhd_init_wlan_mem(void);
 extern void *dhd_wlan_mem_prealloc(int section, unsigned long size);
 #endif /* CONFIG_BROADCOM_WIFI_RESERVED_MEM */

 #define WLAN_REG_ON_GPIO		491
 #define WLAN_HOST_WAKE_GPIO		493

 static int wlan_reg_on = -1;
 #define DHD_DT_COMPAT_ENTRY		"android,bcmdhd_wlan"
 #define WIFI_WL_REG_ON_PROPNAME		"wl_reg_on"

 static int wlan_host_wake_up = -1;
 static int wlan_host_wake_irq = 0;
 #define WIFI_WLAN_HOST_WAKE_PROPNAME    "wl_host_wake"

 int
 dhd_wifi_init_gpio(void)
 {
 	int gpio_reg_on_val;
 	/* ========== WLAN_PWR_EN ============ */
 	char *wlan_node = DHD_DT_COMPAT_ENTRY;
 	struct device_node *root_node = NULL;

 	root_node = of_find_compatible_node(NULL, NULL, wlan_node);
 	if (root_node) {
 		wlan_reg_on = of_get_named_gpio(root_node, WIFI_WL_REG_ON_PROPNAME, 0);
 		wlan_host_wake_up = of_get_named_gpio(root_node, WIFI_WLAN_HOST_WAKE_PROPNAME, 0);
 	} else {
 		DHD_ERROR(("failed to get device node of BRCM WLAN, use default GPIOs\n"));
 		wlan_reg_on = WLAN_REG_ON_GPIO;
 		wlan_host_wake_up = WLAN_HOST_WAKE_GPIO;
 	}

 	/* ========== WLAN_PWR_EN ============ */
 	DHD_INFO(("%s: gpio_wlan_power : %d\n", __FUNCTION__, wlan_reg_on));

 	/*
 	 * For reg_on, gpio_request will fail if the gpio is configured to output-high
 	 * in the dts using gpio-hog, so do not return error for failure.
 	 */
 	if (gpio_request_one(wlan_reg_on, GPIOF_OUT_INIT_HIGH, "WL_REG_ON")) {
 		DHD_ERROR(("%s: Failed to request gpio %d for WL_REG_ON, "
 			"might have configured in the dts\n",
 			__FUNCTION__, wlan_reg_on));
 	} else {
 		DHD_ERROR(("%s: gpio_request WL_REG_ON done - WLAN_EN: GPIO %d\n",
 			__FUNCTION__, wlan_reg_on));
 	}

 	gpio_reg_on_val = gpio_get_value(wlan_reg_on);
 	DHD_INFO(("%s: Initial WL_REG_ON: [%d]\n",
 		__FUNCTION__, gpio_get_value(wlan_reg_on)));

 	if (gpio_reg_on_val == 0) {
 		DHD_INFO(("%s: WL_REG_ON is LOW, drive it HIGH\n", __FUNCTION__));
 		if (gpio_direction_output(wlan_reg_on, 1)) {
 			DHD_ERROR(("%s: WL_REG_ON is failed to pull up\n", __FUNCTION__));
 			return -EIO;
 		}
 	}

 	/* Wait for WIFI_TURNON_DELAY due to power stability */
 	msleep(WIFI_TURNON_DELAY);

 	/* ========== WLAN_HOST_WAKE ============ */
 	DHD_INFO(("%s: gpio_wlan_host_wake : %d\n", __FUNCTION__, wlan_host_wake_up));

 	if (gpio_request_one(wlan_host_wake_up, GPIOF_IN, "WLAN_HOST_WAKE")) {
 		DHD_ERROR(("%s: Failed to request gpio %d for WLAN_HOST_WAKE\n",
 			__FUNCTION__, wlan_host_wake_up));
 			return -ENODEV;
 	} else {
 		DHD_ERROR(("%s: gpio_request WLAN_HOST_WAKE done"
 			" - WLAN_HOST_WAKE: GPIO %d\n",
 			__FUNCTION__, wlan_host_wake_up));
 	}

 	if (gpio_direction_input(wlan_host_wake_up)) {
 		DHD_ERROR(("%s: Failed to set WL_HOST_WAKE gpio direction\n", __FUNCTION__));
 		return -EIO;
 	}

 	wlan_host_wake_irq = gpio_to_irq(wlan_host_wake_up);

 	return 0;
 }

 extern void kirin_pcie_power_on_atu_fixup(void) __attribute__ ((weak));
 extern int kirin_pcie_lp_ctrl(u32 enable) __attribute__ ((weak));

 int
 dhd_wlan_power(int onoff)
 {
 	DHD_INFO(("------------------------------------------------"));
 	DHD_INFO(("------------------------------------------------\n"));
 	DHD_INFO(("%s Enter: power %s\n", __func__, onoff ? "on" : "off"));

 	if (onoff) {
 		if (gpio_direction_output(wlan_reg_on, 1)) {
 			DHD_ERROR(("%s: WL_REG_ON is failed to pull up\n", __FUNCTION__));
 			return -EIO;
 		}
 		if (gpio_get_value(wlan_reg_on)) {
 			DHD_INFO(("WL_REG_ON on-step-2 : [%d]\n",
 				gpio_get_value(wlan_reg_on)));
 		} else {
 			DHD_ERROR(("[%s] gpio value is 0. We need reinit.\n", __func__));
 			if (gpio_direction_output(wlan_reg_on, 1)) {
 				DHD_ERROR(("%s: WL_REG_ON is "
 					"failed to pull up\n", __func__));
 			}
 		}

 		/* Wait for WIFI_TURNON_DELAY due to power stability */
 		msleep(WIFI_TURNON_DELAY);

 		/*
 		 * Call Kiric RC ATU fixup else si_attach will fail due to
 		 * improper BAR0/1 address translations
 		 */
 		if (kirin_pcie_power_on_atu_fixup) {
 			kirin_pcie_power_on_atu_fixup();
 		} else {
 			DHD_ERROR(("[%s] kirin_pcie_power_on_atu_fixup is NULL. "
 				"REG_ON may not work\n", __func__));
 		}
 		/* Enable ASPM after powering ON */
 		if (kirin_pcie_lp_ctrl) {
 			kirin_pcie_lp_ctrl(onoff);
 		} else {
 			DHD_ERROR(("[%s] kirin_pcie_lp_ctrl is NULL. "
 				"ASPM may not work\n", __func__));
 		}
 	} else {
 		/* Disable ASPM before powering off */
 		if (kirin_pcie_lp_ctrl) {
 			kirin_pcie_lp_ctrl(onoff);
 		} else {
 			DHD_ERROR(("[%s] kirin_pcie_lp_ctrl is NULL. "
 				"ASPM may not work\n", __func__));
 		}
 		if (gpio_direction_output(wlan_reg_on, 0)) {
 			DHD_ERROR(("%s: WL_REG_ON is failed to pull up\n", __FUNCTION__));
 			return -EIO;
 		}
 		if (gpio_get_value(wlan_reg_on)) {
 			DHD_INFO(("WL_REG_ON on-step-2 : [%d]\n",
 				gpio_get_value(wlan_reg_on)));
 		}
 	}
 	return 0;
 }
 EXPORT_SYMBOL(dhd_wlan_power);

 static int
 dhd_wlan_reset(int onoff)
 {
 	return 0;
 }

 static int
 dhd_wlan_set_carddetect(int val)
 {
 	return 0;
 }

 #ifdef BCMSDIO
 static int dhd_wlan_get_wake_irq(void)
 {
 	return gpio_to_irq(wlan_host_wake_up);
 }
 #endif /* BCMSDIO */

 #if defined(CONFIG_BCMDHD_OOB_HOST_WAKE) && defined(CONFIG_BCMDHD_GET_OOB_STATE)
 int
 dhd_get_wlan_oob_gpio(void)
 {
 	return gpio_is_valid(wlan_host_wake_up) ?
 		gpio_get_value(wlan_host_wake_up) : -1;
 }
 EXPORT_SYMBOL(dhd_get_wlan_oob_gpio);
 #endif /* CONFIG_BCMDHD_OOB_HOST_WAKE && CONFIG_BCMDHD_GET_OOB_STATE */

 struct resource dhd_wlan_resources = {
 	.name	= "bcmdhd_wlan_irq",
 	.start	= 0, /* Dummy */
 	.end	= 0, /* Dummy */
 	.flags	= IORESOURCE_IRQ | IORESOURCE_IRQ_SHAREABLE |
 	IORESOURCE_IRQ_HIGHEDGE,
 };
 EXPORT_SYMBOL(dhd_wlan_resources);

 struct wifi_platform_data dhd_wlan_control = {
 	.set_power	= dhd_wlan_power,
 	.set_reset	= dhd_wlan_reset,
 	.set_carddetect	= dhd_wlan_set_carddetect,
 #ifdef CONFIG_BROADCOM_WIFI_RESERVED_MEM
 	.mem_prealloc	= dhd_wlan_mem_prealloc,
 #endif /* CONFIG_BROADCOM_WIFI_RESERVED_MEM */
 #ifdef BCMSDIO
 	.get_wake_irq   = dhd_wlan_get_wake_irq,
 #endif
 };
 EXPORT_SYMBOL(dhd_wlan_control);

 int
 dhd_wlan_init(void)
 {
 	int ret;

 	DHD_INFO(("%s: START.......\n", __FUNCTION__));
 	ret = dhd_wifi_init_gpio();
 	if (ret < 0) {
 		DHD_ERROR(("%s: failed to initiate GPIO, ret=%d\n",
 			__FUNCTION__, ret));
 		goto fail;
 	}

 	dhd_wlan_resources.start = wlan_host_wake_irq;
 	dhd_wlan_resources.end = wlan_host_wake_irq;

 #ifdef CONFIG_BROADCOM_WIFI_RESERVED_MEM
 	ret = dhd_init_wlan_mem();
 	if (ret < 0) {
 		DHD_ERROR(("%s: failed to alloc reserved memory,"
 				" ret=%d\n", __FUNCTION__, ret));
 	}
 #endif /* CONFIG_BROADCOM_WIFI_RESERVED_MEM */

 fail:
 	DHD_INFO(("%s: FINISH.......\n", __FUNCTION__));
 	return ret;
 }

 int
 dhd_wlan_deinit(void)
 {
 	gpio_free(wlan_host_wake_up);
 	gpio_free(wlan_reg_on);
 	return 0;
 }
 #ifndef BCMDHD_MODULAR
 /* Required only for Built-in DHD */
 device_initcall(dhd_wlan_init);
 #endif /* BOARD_HIKEY_MODULAR */
	/*
	* Platform Dependent file for Hikey
	*
	* Copyright (C) 2020, Broadcom.
	*
	* Unless you and Broadcom execute a separate written software license
	* agreement governing use of this software, this software is licensed to you
	* under the terms of the GNU General Public License version 2 (the "GPL"),
	* available at http://www.broadcom.com/licenses/GPLv2.php, with the
	* following added to such license:
	*
	* As a special exception, the copyright holders of this software give you
	* permission to link this software with independent modules, and to copy and
	* distribute the resulting executable under terms of your choice, provided that
	* you also meet, for each linked independent module, the terms and conditions of
	* the license of that module. An independent module is a module which is not
	* derived from this software. The special exception does not apply to any
	* modifications of the software.
	*
	*
	* <<Broadcom-WL-IPTag/Open:>>
	*
	* $Id$
	*
	*/

	#include <linux/kernel.h>
	#include <linux/init.h>
	#include <linux/platform_device.h>
	#include <linux/delay.h>
	#include <linux/err.h>
	#include <linux/gpio.h>
	#include <linux/skbuff.h>
	#include <linux/fcntl.h>
	#include <linux/fs.h>
	#include <linux/of_gpio.h>
	#ifdef CONFIG_WIFI_CONTROL_FUNC
	#include <linux/wlan_plat.h>
	#else
	#include <dhd_plat.h>
	#endif /* CONFIG_WIFI_CONTROL_FUNC */
	#include <dhd_dbg.h>
	#include <dhd.h>

	#ifdef CONFIG_BROADCOM_WIFI_RESERVED_MEM
	extern int dhd_init_wlan_mem(void);
	extern void *dhd_wlan_mem_prealloc(int section, unsigned long size);
	#endif /* CONFIG_BROADCOM_WIFI_RESERVED_MEM */

	#define WLAN_REG_ON_GPIO 491
	#define WLAN_HOST_WAKE_GPIO 493

	static int wlan_reg_on = -1;
	#define DHD_DT_COMPAT_ENTRY "android,bcmdhd_wlan"
	#define WIFI_WL_REG_ON_PROPNAME "wl_reg_on"

	static int wlan_host_wake_up = -1;
	static int wlan_host_wake_irq = 0;
	#define WIFI_WLAN_HOST_WAKE_PROPNAME "wl_host_wake"

	int
	dhd_wifi_init_gpio(void)
	{
	int gpio_reg_on_val;
	/* ========== WLAN_PWR_EN ============ */
	char *wlan_node = DHD_DT_COMPAT_ENTRY;
	struct device_node *root_node = NULL;

	root_node = of_find_compatible_node(NULL, NULL, wlan_node);
	if (root_node) {
	wlan_reg_on = of_get_named_gpio(root_node, WIFI_WL_REG_ON_PROPNAME, 0);
	wlan_host_wake_up = of_get_named_gpio(root_node, WIFI_WLAN_HOST_WAKE_PROPNAME, 0);
	} else {
	DHD_ERROR(("failed to get device node of BRCM WLAN, use default GPIOs\n"));
	wlan_reg_on = WLAN_REG_ON_GPIO;
	wlan_host_wake_up = WLAN_HOST_WAKE_GPIO;
	}

	/* ========== WLAN_PWR_EN ============ */
	DHD_INFO(("%s: gpio_wlan_power : %d\n", __FUNCTION__, wlan_reg_on));

	/*
	* For reg_on, gpio_request will fail if the gpio is configured to output-high
	* in the dts using gpio-hog, so do not return error for failure.
	*/
	if (gpio_request_one(wlan_reg_on, GPIOF_OUT_INIT_HIGH, "WL_REG_ON")) {
	DHD_ERROR(("%s: Failed to request gpio %d for WL_REG_ON, "
	"might have configured in the dts\n",
	__FUNCTION__, wlan_reg_on));
	} else {
	DHD_ERROR(("%s: gpio_request WL_REG_ON done - WLAN_EN: GPIO %d\n",
	__FUNCTION__, wlan_reg_on));
	}

	gpio_reg_on_val = gpio_get_value(wlan_reg_on);
	DHD_INFO(("%s: Initial WL_REG_ON: [%d]\n",
	__FUNCTION__, gpio_get_value(wlan_reg_on)));

	if (gpio_reg_on_val == 0) {
	DHD_INFO(("%s: WL_REG_ON is LOW, drive it HIGH\n", __FUNCTION__));
	if (gpio_direction_output(wlan_reg_on, 1)) {
	DHD_ERROR(("%s: WL_REG_ON is failed to pull up\n", __FUNCTION__));
	return -EIO;
	}
	}

	/* Wait for WIFI_TURNON_DELAY due to power stability */
	msleep(WIFI_TURNON_DELAY);

	/* ========== WLAN_HOST_WAKE ============ */
	DHD_INFO(("%s: gpio_wlan_host_wake : %d\n", __FUNCTION__, wlan_host_wake_up));

	if (gpio_request_one(wlan_host_wake_up, GPIOF_IN, "WLAN_HOST_WAKE")) {
	DHD_ERROR(("%s: Failed to request gpio %d for WLAN_HOST_WAKE\n",
	__FUNCTION__, wlan_host_wake_up));
	return -ENODEV;
	} else {
	DHD_ERROR(("%s: gpio_request WLAN_HOST_WAKE done"
	" - WLAN_HOST_WAKE: GPIO %d\n",
	__FUNCTION__, wlan_host_wake_up));
	}

	if (gpio_direction_input(wlan_host_wake_up)) {
	DHD_ERROR(("%s: Failed to set WL_HOST_WAKE gpio direction\n", __FUNCTION__));
	return -EIO;
	}

	wlan_host_wake_irq = gpio_to_irq(wlan_host_wake_up);

	return 0;
	}

	extern void kirin_pcie_power_on_atu_fixup(void) __attribute__ ((weak));
	extern int kirin_pcie_lp_ctrl(u32 enable) __attribute__ ((weak));

	int
	dhd_wlan_power(int onoff)
	{
	DHD_INFO(("------------------------------------------------"));
	DHD_INFO(("------------------------------------------------\n"));
	DHD_INFO(("%s Enter: power %s\n", __func__, onoff ? "on" : "off"));

	if (onoff) {
	if (gpio_direction_output(wlan_reg_on, 1)) {
	DHD_ERROR(("%s: WL_REG_ON is failed to pull up\n", __FUNCTION__));
	return -EIO;
	}
	if (gpio_get_value(wlan_reg_on)) {
	DHD_INFO(("WL_REG_ON on-step-2 : [%d]\n",
	gpio_get_value(wlan_reg_on)));
	} else {
	DHD_ERROR(("[%s] gpio value is 0. We need reinit.\n", __func__));
	if (gpio_direction_output(wlan_reg_on, 1)) {
	DHD_ERROR(("%s: WL_REG_ON is "
	"failed to pull up\n", __func__));
	}
	}

	/* Wait for WIFI_TURNON_DELAY due to power stability */
	msleep(WIFI_TURNON_DELAY);

	/*
	* Call Kiric RC ATU fixup else si_attach will fail due to
	* improper BAR0/1 address translations
	*/
	if (kirin_pcie_power_on_atu_fixup) {
	kirin_pcie_power_on_atu_fixup();
	} else {
	DHD_ERROR(("[%s] kirin_pcie_power_on_atu_fixup is NULL. "
	"REG_ON may not work\n", __func__));
	}
	/* Enable ASPM after powering ON */
	if (kirin_pcie_lp_ctrl) {
	kirin_pcie_lp_ctrl(onoff);
	} else {
	DHD_ERROR(("[%s] kirin_pcie_lp_ctrl is NULL. "
	"ASPM may not work\n", __func__));
	}
	} else {
	/* Disable ASPM before powering off */
	if (kirin_pcie_lp_ctrl) {
	kirin_pcie_lp_ctrl(onoff);
	} else {
	DHD_ERROR(("[%s] kirin_pcie_lp_ctrl is NULL. "
	"ASPM may not work\n", __func__));
	}
	if (gpio_direction_output(wlan_reg_on, 0)) {
	DHD_ERROR(("%s: WL_REG_ON is failed to pull up\n", __FUNCTION__));
	return -EIO;
	}
	if (gpio_get_value(wlan_reg_on)) {
	DHD_INFO(("WL_REG_ON on-step-2 : [%d]\n",
	gpio_get_value(wlan_reg_on)));
	}
	}
	return 0;
	}
	EXPORT_SYMBOL(dhd_wlan_power);

	static int
	dhd_wlan_reset(int onoff)
	{
	return 0;
	}

	static int
	dhd_wlan_set_carddetect(int val)
	{
	return 0;
	}

	#ifdef BCMSDIO
	static int dhd_wlan_get_wake_irq(void)
	{
	return gpio_to_irq(wlan_host_wake_up);
	}
	#endif /* BCMSDIO */

	#if defined(CONFIG_BCMDHD_OOB_HOST_WAKE) && defined(CONFIG_BCMDHD_GET_OOB_STATE)
	int
	dhd_get_wlan_oob_gpio(void)
	{
	return gpio_is_valid(wlan_host_wake_up) ?
	gpio_get_value(wlan_host_wake_up) : -1;
	}
	EXPORT_SYMBOL(dhd_get_wlan_oob_gpio);
	#endif /* CONFIG_BCMDHD_OOB_HOST_WAKE && CONFIG_BCMDHD_GET_OOB_STATE */

	struct resource dhd_wlan_resources = {
	.name = "bcmdhd_wlan_irq",
	.start = 0, /* Dummy */
	.end = 0, /* Dummy */
	.flags = IORESOURCE_IRQ \| IORESOURCE_IRQ_SHAREABLE \|
	IORESOURCE_IRQ_HIGHEDGE,
	};
	EXPORT_SYMBOL(dhd_wlan_resources);

	struct wifi_platform_data dhd_wlan_control = {
	.set_power = dhd_wlan_power,
	.set_reset = dhd_wlan_reset,
	.set_carddetect = dhd_wlan_set_carddetect,
	#ifdef CONFIG_BROADCOM_WIFI_RESERVED_MEM
	.mem_prealloc = dhd_wlan_mem_prealloc,
	#endif /* CONFIG_BROADCOM_WIFI_RESERVED_MEM */
	#ifdef BCMSDIO
	.get_wake_irq = dhd_wlan_get_wake_irq,
	#endif
	};
	EXPORT_SYMBOL(dhd_wlan_control);

	int
	dhd_wlan_init(void)
	{
	int ret;

	DHD_INFO(("%s: START.......\n", __FUNCTION__));
	ret = dhd_wifi_init_gpio();
	if (ret < 0) {
	DHD_ERROR(("%s: failed to initiate GPIO, ret=%d\n",
	__FUNCTION__, ret));
	goto fail;
	}

	dhd_wlan_resources.start = wlan_host_wake_irq;
	dhd_wlan_resources.end = wlan_host_wake_irq;

	#ifdef CONFIG_BROADCOM_WIFI_RESERVED_MEM
	ret = dhd_init_wlan_mem();
	if (ret < 0) {
	DHD_ERROR(("%s: failed to alloc reserved memory,"
	" ret=%d\n", __FUNCTION__, ret));
	}
	#endif /* CONFIG_BROADCOM_WIFI_RESERVED_MEM */

	fail:
	DHD_INFO(("%s: FINISH.......\n", __FUNCTION__));
	return ret;
	}

	int
	dhd_wlan_deinit(void)
	{
	gpio_free(wlan_host_wake_up);
	gpio_free(wlan_reg_on);
	return 0;
	}
	#ifndef BCMDHD_MODULAR
	/* Required only for Built-in DHD */
	device_initcall(dhd_wlan_init);
	#endif /* BOARD_HIKEY_MODULAR */