Merge "cnss2: Add sysfs entry for system shutdown" (649cfcb1) · Commits · e / devices / android_kernel_xiaomi_nabu

drivers/net/wireless/cnss2/main.c

+76 −2

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		/* Copyright (c) 2016-2019, The Linux Foundation. All rights reserved. */
		/* Copyright (c) 2016-2020, The Linux Foundation. All rights reserved. */

		#include <linux/delay.h>
		#include <linux/jiffies.h>
		@@ -679,6 +679,13 @@ int cnss_idle_restart(struct device *dev)
		timeout = cnss_get_boot_timeout(dev);

		reinit_completion(&plat_priv->power_up_complete);

		if (test_bit(CNSS_IN_REBOOT, &plat_priv->driver_state)) {
		cnss_pr_dbg("Reboot or shutdown is in progress, ignore idle restart\n");
		ret = -EINVAL;
		goto out;
		}

		ret = wait_for_completion_timeout(&plat_priv->power_up_complete,
		msecs_to_jiffies(timeout) << 2);
		if (!ret) {
		@@ -1949,6 +1956,23 @@ static void cnss_unregister_bus_scale(struct cnss_plat_data *plat_priv)
		msm_bus_scale_unregister_client(bus_bw_info->bus_client);
		}

		static ssize_t shutdown_store(struct kobject *kobj,
		struct kobj_attribute *attr,
		const char *buf, size_t count)
		{
		struct cnss_plat_data *plat_priv = cnss_get_plat_priv(NULL);

		if (plat_priv) {
		set_bit(CNSS_IN_REBOOT, &plat_priv->driver_state);
		del_timer(&plat_priv->fw_boot_timer);
		complete_all(&plat_priv->power_up_complete);
		}

		cnss_pr_dbg("Received shutdown notification\n");

		return count;
		}

		static ssize_t fs_ready_store(struct device *dev,
		struct device_attribute *attr,
		const char *buf, size_t count)
		@@ -1992,18 +2016,55 @@ static ssize_t fs_ready_store(struct device *dev,
		return count;
		}

		static struct kobj_attribute shutdown_attribute = __ATTR_WO(shutdown);
		static DEVICE_ATTR_WO(fs_ready);

		static int cnss_create_shutdown_sysfs(struct cnss_plat_data *plat_priv)
		{
		int ret = 0;

		plat_priv->shutdown_kobj = kobject_create_and_add("shutdown_wlan",
		kernel_kobj);
		if (!plat_priv->shutdown_kobj) {
		cnss_pr_err("Failed to create shutdown_wlan kernel object\n");
		return -ENOMEM;
		}

		ret = sysfs_create_file(plat_priv->shutdown_kobj,
		&shutdown_attribute.attr);
		if (ret) {
		cnss_pr_err("Failed to create sysfs shutdown file, err = %d\n",
		ret);
		kobject_put(plat_priv->shutdown_kobj);
		plat_priv->shutdown_kobj = NULL;
		}

		return ret;
		}

		static void cnss_remove_shutdown_sysfs(struct cnss_plat_data *plat_priv)
		{
		if (plat_priv->shutdown_kobj) {
		sysfs_remove_file(plat_priv->shutdown_kobj,
		&shutdown_attribute.attr);
		kobject_put(plat_priv->shutdown_kobj);
		plat_priv->shutdown_kobj = NULL;
		}
		}

		static int cnss_create_sysfs(struct cnss_plat_data *plat_priv)
		{
		int ret = 0;

		ret = device_create_file(&plat_priv->plat_dev->dev, &dev_attr_fs_ready);
		if (ret) {
		cnss_pr_err("Failed to create device file, err = %d\n", ret);
		cnss_pr_err("Failed to create device fs_ready file, err = %d\n",
		ret);
		goto out;
		}

		cnss_create_shutdown_sysfs(plat_priv);

		return 0;
		out:
		return ret;
		@@ -2011,6 +2072,7 @@ static int cnss_create_sysfs(struct cnss_plat_data *plat_priv)

		static void cnss_remove_sysfs(struct cnss_plat_data *plat_priv)
		{
		cnss_remove_shutdown_sysfs(plat_priv);
		device_remove_file(&plat_priv->plat_dev->dev, &dev_attr_fs_ready);
		}

		@@ -2105,6 +2167,17 @@ static void cnss_init_control_params(struct cnss_plat_data *plat_priv)
		plat_priv->ctrl_params.time_sync_period = CNSS_TIME_SYNC_PERIOD_DEFAULT;
		}

		static void cnss_get_wlaon_pwr_ctrl_info(struct cnss_plat_data *plat_priv)
		{
		struct device *dev = &plat_priv->plat_dev->dev;

		plat_priv->set_wlaon_pwr_ctrl =
		of_property_read_bool(dev->of_node, "qcom,set-wlaon-pwr-ctrl");

		cnss_pr_dbg("set_wlaon_pwr_ctrl is %d\n",
		plat_priv->set_wlaon_pwr_ctrl);
		}

		static const struct platform_device_id cnss_platform_id_table[] = {
		{ .name = "qca6174", .driver_data = QCA6174_DEVICE_ID, },
		{ .name = "qca6290", .driver_data = QCA6290_DEVICE_ID, },
		@@ -2175,6 +2248,7 @@ static int cnss_probe(struct platform_device *plat_dev)
		INIT_LIST_HEAD(&plat_priv->vreg_list);
		INIT_LIST_HEAD(&plat_priv->clk_list);

		cnss_get_wlaon_pwr_ctrl_info(plat_priv);
		cnss_get_cpr_info(plat_priv);
		cnss_init_control_params(plat_priv);

drivers/net/wireless/cnss2/main.h

+3 −1

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0-only */
		/* Copyright (c) 2016-2019, The Linux Foundation. All rights reserved. */
		/* Copyright (c) 2016-2020, The Linux Foundation. All rights reserved. */

		#ifndef _CNSS_MAIN_H
		#define _CNSS_MAIN_H
		@@ -362,6 +362,8 @@ struct cnss_plat_data {
		void *get_info_cb_ctx;
		int (get_info_cb)(void ctx, void *event, int event_len);
		u8 use_nv_mac;
		u8 set_wlaon_pwr_ctrl;
		struct kobject *shutdown_kobj;
		};

		#ifdef CONFIG_ARCH_QCOM

drivers/net/wireless/cnss2/pci.c

+69 −2

Original line number	Diff line number	Diff line
		@@ -62,6 +62,9 @@ static DEFINE_SPINLOCK(time_sync_lock);
		#define MHI_TIMEOUT_OVERWRITE_MS (plat_priv->ctrl_params.mhi_timeout)
		#define MHI_M2_TIMEOUT_MS (plat_priv->ctrl_params.mhi_m2_timeout)

		#define WLAON_PWR_CTRL_SHUTDOWN_DELAY_MIN_US 1000
		#define WLAON_PWR_CTRL_SHUTDOWN_DELAY_MAX_US 2000

		#define FORCE_WAKE_DELAY_MIN_US 4000
		#define FORCE_WAKE_DELAY_MAX_US 6000
		#define FORCE_WAKE_DELAY_TIMEOUT_US 60000
		@@ -465,6 +468,7 @@ static int cnss_pci_force_wake_get(struct cnss_pci_data *pci_priv)

		if (cnss_pci_is_device_awake(dev) != true) {
		cnss_pr_err("Timed out to request force wake\n");
		cnss_pci_force_wake_release(dev);
		return -ETIMEDOUT;
		}

		@@ -1078,6 +1082,62 @@ static void cnss_pci_deinit_mhi(struct cnss_pci_data *pci_priv)
		cnss_pci_set_mhi_state(pci_priv, CNSS_MHI_DEINIT);
		}

		static void cnss_pci_set_wlaon_pwr_ctrl(struct cnss_pci_data *pci_priv,
		bool set_vddd4blow, bool set_shutdown,
		bool do_force_wake)
		{
		struct cnss_plat_data *plat_priv = pci_priv->plat_priv;
		int ret;
		u32 val;

		if (!plat_priv->set_wlaon_pwr_ctrl)
		return;

		if (do_force_wake)
		if (cnss_pci_force_wake_get(pci_priv))
		return;

		ret = cnss_pci_reg_read(pci_priv, QCA6390_WLAON_QFPROM_PWR_CTRL_REG,
		&val);
		if (ret) {
		cnss_pr_err("Failed to read register offset 0x%x, err = %d\n",
		QCA6390_WLAON_QFPROM_PWR_CTRL_REG, ret);
		goto force_wake_put;
		}

		cnss_pr_dbg("Read register offset 0x%x, val = 0x%x\n",
		QCA6390_WLAON_QFPROM_PWR_CTRL_REG, val);

		if (set_vddd4blow)
		val \|= QFPROM_PWR_CTRL_VDD4BLOW_SW_EN_MASK;
		else
		val &= ~QFPROM_PWR_CTRL_VDD4BLOW_SW_EN_MASK;

		if (set_shutdown)
		val \|= QFPROM_PWR_CTRL_SHUTDOWN_EN_MASK;
		else
		val &= ~QFPROM_PWR_CTRL_SHUTDOWN_EN_MASK;

		ret = cnss_pci_reg_write(pci_priv, QCA6390_WLAON_QFPROM_PWR_CTRL_REG,
		val);
		if (ret) {
		cnss_pr_err("Failed to write register offset 0x%x, err = %d\n",
		QCA6390_WLAON_QFPROM_PWR_CTRL_REG, ret);
		goto force_wake_put;
		}

		cnss_pr_dbg("Write val 0x%x to register offset 0x%x\n", val,
		QCA6390_WLAON_QFPROM_PWR_CTRL_REG);

		if (set_shutdown)
		usleep_range(WLAON_PWR_CTRL_SHUTDOWN_DELAY_MIN_US,
		WLAON_PWR_CTRL_SHUTDOWN_DELAY_MAX_US);

		force_wake_put:
		if (do_force_wake)
		cnss_pci_force_wake_put(pci_priv);
		}

		static int cnss_pci_get_device_timestamp(struct cnss_pci_data *pci_priv,
		u64 *time_us)
		{
		@@ -1618,6 +1678,7 @@ static int cnss_qca6290_powerup(struct cnss_pci_data *pci_priv)
		goto power_off;
		}

		cnss_pci_set_wlaon_pwr_ctrl(pci_priv, false, false, false);
		timeout = cnss_get_boot_timeout(&pci_priv->pci_dev->dev);

		ret = cnss_pci_start_mhi(pci_priv);
		@@ -1652,6 +1713,7 @@ static int cnss_qca6290_powerup(struct cnss_pci_data *pci_priv)
		return 0;

		stop_mhi:
		cnss_pci_set_wlaon_pwr_ctrl(pci_priv, false, true, true);
		cnss_pci_power_off_mhi(pci_priv);
		cnss_suspend_pci_link(pci_priv);
		cnss_pci_deinit_mhi(pci_priv);
		@@ -1665,6 +1727,7 @@ static int cnss_qca6290_shutdown(struct cnss_pci_data *pci_priv)
		{
		int ret = 0;
		struct cnss_plat_data *plat_priv = pci_priv->plat_priv;
		int do_force_wake = true;

		cnss_pci_pm_runtime_resume(pci_priv);

		@@ -1691,6 +1754,10 @@ static int cnss_qca6290_shutdown(struct cnss_pci_data *pci_priv)
		goto skip_power_off;
		}

		if (test_bit(CNSS_DEV_ERR_NOTIFY, &plat_priv->driver_state))
		do_force_wake = false;

		cnss_pci_set_wlaon_pwr_ctrl(pci_priv, false, true, do_force_wake);
		cnss_pci_power_off_mhi(pci_priv);
		ret = cnss_suspend_pci_link(pci_priv);
		if (ret)
		@@ -4083,6 +4150,7 @@ static int cnss_pci_probe(struct pci_dev *pci_dev,
		case QCA6290_DEVICE_ID:
		case QCA6390_DEVICE_ID:
		case QCA6490_DEVICE_ID:
		cnss_pci_set_wlaon_pwr_ctrl(pci_priv, false, false, false);
		timer_setup(&pci_priv->dev_rddm_timer,
		cnss_dev_rddm_timeout_hdlr, 0);
		INIT_DELAYED_WORK(&pci_priv->time_sync_work,
		@@ -4097,11 +4165,10 @@ static int cnss_pci_probe(struct pci_dev *pci_dev,
		goto disable_bus;
		}
		cnss_pci_get_link_status(pci_priv);

		cnss_pci_config_regs(pci_priv);

		if (EMULATION_HW)
		break;
		cnss_pci_set_wlaon_pwr_ctrl(pci_priv, false, true, false);
		ret = cnss_suspend_pci_link(pci_priv);
		if (ret)
		cnss_pr_err("Failed to suspend PCI link, err = %d\n",

drivers/net/wireless/cnss2/reg.h

+3 −1

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0-only */
		/* Copyright (c) 2019, The Linux Foundation. All rights reserved. */
		/* Copyright (c) 2019-2020, The Linux Foundation. All rights reserved. */

		#ifndef _CNSS_REG_H
		#define _CNSS_REG_H
		@@ -204,6 +204,8 @@
		#define QCA6390_WLAON_WL_CLK_CNTL_KDF_REG 0x1F80314
		#define QCA6390_WLAON_WL_CLK_CNTL_PMU_HFRC_REG 0x1F80318
		#define QCA6390_WLAON_QFPROM_PWR_CTRL_REG 0x1F8031C
		#define QFPROM_PWR_CTRL_VDD4BLOW_SW_EN_MASK 0x4
		#define QFPROM_PWR_CTRL_SHUTDOWN_EN_MASK 0x1
		#define QCA6390_WLAON_DLY_CONFIG 0x1F80400
		#define QCA6390_WLAON_WLAON_Q6_IRQ_REG 0x1F80404
		#define QCA6390_WLAON_PCIE_INTF_SW_CFG_REG 0x1F80408