1 files changed, 0 insertions, 478 deletions

diff --git a/drivers/usb/misc/ucsi.c b/drivers/usb/misc/ucsi.c
deleted file mode 100644
index 81251aaa20f9..000000000000
--- a/drivers/usb/misc/ucsi.c
+++ /dev/null
@@ -1,478 +0,0 @@
-/*
- * USB Type-C Connector System Software Interface driver
- *
- * Copyright (C) 2016, Intel Corporation
- * Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/platform_device.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/acpi.h>
-
-#include "ucsi.h"
-
-/* Double the time defined by MIN_TIME_TO_RESPOND_WITH_BUSY */
-#define UCSI_TIMEOUT_MS 20
-
-enum ucsi_status {
-	UCSI_IDLE = 0,
-	UCSI_BUSY,
-	UCSI_ERROR,
-};
-
-struct ucsi_connector {
-	int num;
-	struct ucsi *ucsi;
-	struct work_struct work;
-	struct ucsi_connector_capability cap;
-};
-
-struct ucsi {
-	struct device *dev;
-	struct ucsi_data __iomem *data;
-
-	enum ucsi_status status;
-	struct completion complete;
-	struct ucsi_capability cap;
-	struct ucsi_connector *connector;
-
-	/* device lock */
-	spinlock_t dev_lock;
-
-	/* PPM Communication lock */
-	struct mutex ppm_lock;
-
-	/* PPM communication flags */
-	unsigned long flags;
-#define EVENT_PENDING	0
-#define COMMAND_PENDING	1
-};
-
-static int ucsi_acpi_cmd(struct ucsi *ucsi, struct ucsi_control *ctrl)
-{
-	guid_t guid = GUID_INIT(0x6f8398c2, 0x7ca4, 0x11e4,
-				0xad, 0x36, 0x63, 0x10, 0x42, 0xb5, 0x00, 0x8f);
-	union acpi_object *obj;
-
-	ucsi->data->ctrl.raw_cmd = ctrl->raw_cmd;
-
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(ucsi->dev), &guid, 1, 1, NULL);
-	if (!obj) {
-		dev_err(ucsi->dev, "%s: failed to evaluate _DSM\n", __func__);
-		return -EIO;
-	}
-
-	ACPI_FREE(obj);
-	return 0;
-}
-
-static void ucsi_acpi_notify(acpi_handle handle, u32 event, void *data)
-{
-	struct ucsi *ucsi = data;
-	struct ucsi_cci *cci;
-
-	spin_lock(&ucsi->dev_lock);
-
-	ucsi->status = UCSI_IDLE;
-	cci = &ucsi->data->cci;
-
-	/*
-	 * REVISIT: This is not documented behavior, but all known PPMs ACK
-	 * asynchronous events by sending notification with cleared CCI.
-	 */
-	if (!ucsi->data->raw_cci) {
-		if (test_bit(EVENT_PENDING, &ucsi->flags))
-			complete(&ucsi->complete);
-		else
-			dev_WARN(ucsi->dev, "spurious notification\n");
-		goto out_unlock;
-	}
-
-	if (test_bit(COMMAND_PENDING, &ucsi->flags)) {
-		if (cci->busy) {
-			ucsi->status = UCSI_BUSY;
-			complete(&ucsi->complete);
-
-			goto out_unlock;
-		} else if (cci->ack_complete || cci->cmd_complete) {
-			/* Error Indication is only valid with commands */
-			if (cci->error && cci->cmd_complete)
-				ucsi->status = UCSI_ERROR;
-
-			ucsi->data->ctrl.raw_cmd = 0;
-			complete(&ucsi->complete);
-		}
-	}
-
-	if (cci->connector_change) {
-		struct ucsi_connector *con;
-
-		/*
-		 * This is workaround for buggy PPMs that create asynchronous
-		 * event notifications before OPM has enabled them.
-		 */
-		if (!ucsi->connector)
-			goto out_unlock;
-
-		con = ucsi->connector + (cci->connector_change - 1);
-
-		/*
-		 * PPM will not clear the connector specific bit in Connector
-		 * Change Indication field of CCI until the driver has ACK it,
-		 * and the driver can not ACK it before it has been processed.
-		 * The PPM will not generate new events before the first has
-		 * been acknowledged, even if they are for an other connector.
-		 * So only one event at a time.
-		 */
-		if (!test_and_set_bit(EVENT_PENDING, &ucsi->flags))
-			schedule_work(&con->work);
-	}
-out_unlock:
-	spin_unlock(&ucsi->dev_lock);
-}
-
-static int ucsi_ack(struct ucsi *ucsi, u8 cmd)
-{
-	struct ucsi_control ctrl;
-	int ret;
-
-	ctrl.cmd.cmd = UCSI_ACK_CC_CI;
-	ctrl.cmd.length = 0;
-	ctrl.cmd.data = cmd;
-	ret = ucsi_acpi_cmd(ucsi, &ctrl);
-	if (ret)
-		return ret;
-
-	/* Waiting for ACK also with ACK CMD for now */
-	ret = wait_for_completion_timeout(&ucsi->complete,
-					  msecs_to_jiffies(UCSI_TIMEOUT_MS));
-	if (!ret)
-		return -ETIMEDOUT;
-	return 0;
-}
-
-static int ucsi_run_cmd(struct ucsi *ucsi, struct ucsi_control *ctrl,
-			void *data, size_t size)
-{
-	u16 err_value = 0;
-	int ret;
-
-	set_bit(COMMAND_PENDING, &ucsi->flags);
-
-	ret = ucsi_acpi_cmd(ucsi, ctrl);
-	if (ret)
-		goto err_clear_flag;
-
-	ret = wait_for_completion_timeout(&ucsi->complete,
-					  msecs_to_jiffies(UCSI_TIMEOUT_MS));
-	if (!ret) {
-		ret = -ETIMEDOUT;
-		goto err_clear_flag;
-	}
-
-	switch (ucsi->status) {
-	case UCSI_IDLE:
-		if (data)
-			memcpy(data, ucsi->data->message_in, size);
-
-		ret = ucsi_ack(ucsi, UCSI_ACK_CMD);
-		break;
-	case UCSI_BUSY:
-		/* The caller decides whether to cancel or not */
-		ret = -EBUSY;
-		goto err_clear_flag;
-	case UCSI_ERROR:
-		ret = ucsi_ack(ucsi, UCSI_ACK_CMD);
-		if (ret)
-			goto err_clear_flag;
-
-		ctrl->cmd.cmd = UCSI_GET_ERROR_STATUS;
-		ctrl->cmd.length = 0;
-		ctrl->cmd.data = 0;
-		ret = ucsi_acpi_cmd(ucsi, ctrl);
-		if (ret)
-			goto err_clear_flag;
-
-		ret = wait_for_completion_timeout(&ucsi->complete,
-					msecs_to_jiffies(UCSI_TIMEOUT_MS));
-		if (!ret) {
-			ret = -ETIMEDOUT;
-			goto err_clear_flag;
-		}
-
-		memcpy(&err_value, ucsi->data->message_in, sizeof(err_value));
-
-		/* Something has really gone wrong */
-		if (WARN_ON(ucsi->status == UCSI_ERROR)) {
-			ret = -ENODEV;
-			goto err_clear_flag;
-		}
-
-		ret = ucsi_ack(ucsi, UCSI_ACK_CMD);
-		if (ret)
-			goto err_clear_flag;
-
-		switch (err_value) {
-		case UCSI_ERROR_INCOMPATIBLE_PARTNER:
-			ret = -EOPNOTSUPP;
-			break;
-		case UCSI_ERROR_CC_COMMUNICATION_ERR:
-			ret = -ECOMM;
-			break;
-		case UCSI_ERROR_CONTRACT_NEGOTIATION_FAIL:
-			ret = -EIO;
-			break;
-		case UCSI_ERROR_DEAD_BATTERY:
-			dev_warn(ucsi->dev, "Dead battery condition!\n");
-			ret = -EPERM;
-			break;
-		/* The following mean a bug in this driver */
-		case UCSI_ERROR_INVALID_CON_NUM:
-		case UCSI_ERROR_UNREGONIZED_CMD:
-		case UCSI_ERROR_INVALID_CMD_ARGUMENT:
-		default:
-			dev_warn(ucsi->dev,
-				 "%s: possible UCSI driver bug - error %hu\n",
-				 __func__, err_value);
-			ret = -EINVAL;
-			break;
-		}
-		break;
-	}
-	ctrl->raw_cmd = 0;
-err_clear_flag:
-	clear_bit(COMMAND_PENDING, &ucsi->flags);
-	return ret;
-}
-
-static void ucsi_connector_change(struct work_struct *work)
-{
-	struct ucsi_connector *con = container_of(work, struct ucsi_connector,
-						  work);
-	struct ucsi_connector_status constat;
-	struct ucsi *ucsi = con->ucsi;
-	struct ucsi_control ctrl;
-	int ret;
-
-	mutex_lock(&ucsi->ppm_lock);
-
-	ctrl.cmd.cmd = UCSI_GET_CONNECTOR_STATUS;
-	ctrl.cmd.length = 0;
-	ctrl.cmd.data = con->num;
-	ret = ucsi_run_cmd(con->ucsi, &ctrl, &constat, sizeof(constat));
-	if (ret) {
-		dev_err(ucsi->dev, "%s: failed to read connector status (%d)\n",
-			__func__, ret);
-		goto out_ack_event;
-	}
-
-	/* Ignoring disconnections and Alternate Modes */
-	if (!constat.connected || !(constat.change &
-	    (UCSI_CONSTAT_PARTNER_CHANGE | UCSI_CONSTAT_CONNECT_CHANGE)) ||
-	    constat.partner_flags & UCSI_CONSTAT_PARTNER_FLAG_ALT_MODE)
-		goto out_ack_event;
-
-	/* If the partner got USB Host role, attempting swap */
-	if (constat.partner_type & UCSI_CONSTAT_PARTNER_TYPE_DFP) {
-		ctrl.uor.cmd = UCSI_SET_UOR;
-		ctrl.uor.con_num = con->num;
-		ctrl.uor.role = UCSI_UOR_ROLE_DFP;
-
-		ret = ucsi_run_cmd(con->ucsi, &ctrl, NULL, 0);
-		if (ret)
-			dev_err(ucsi->dev, "%s: failed to swap role (%d)\n",
-				__func__, ret);
-	}
-out_ack_event:
-	ucsi_ack(ucsi, UCSI_ACK_EVENT);
-	clear_bit(EVENT_PENDING, &ucsi->flags);
-	mutex_unlock(&ucsi->ppm_lock);
-}
-
-static int ucsi_reset_ppm(struct ucsi *ucsi)
-{
-	int timeout = UCSI_TIMEOUT_MS;
-	struct ucsi_control ctrl;
-	int ret;
-
-	memset(&ctrl, 0, sizeof(ctrl));
-	ctrl.cmd.cmd = UCSI_PPM_RESET;
-	ret = ucsi_acpi_cmd(ucsi, &ctrl);
-	if (ret)
-		return ret;
-
-	/* There is no quarantee the PPM will ever set the RESET_COMPLETE bit */
-	while (!ucsi->data->cci.reset_complete && timeout--)
-		usleep_range(1000, 2000);
-	return 0;
-}
-
-static int ucsi_init(struct ucsi *ucsi)
-{
-	struct ucsi_connector *con;
-	struct ucsi_control ctrl;
-	int ret;
-	int i;
-
-	init_completion(&ucsi->complete);
-	spin_lock_init(&ucsi->dev_lock);
-	mutex_init(&ucsi->ppm_lock);
-
-	/* Reset the PPM */
-	ret = ucsi_reset_ppm(ucsi);
-	if (ret)
-		return ret;
-
-	/*
-	 * REVISIT: Executing second reset to WA an issue seen on some of the
-	 * Broxton based platforms, where the first reset puts the PPM into a
-	 * state where it's unable to recognise some of the commands.
-	 */
-	ret = ucsi_reset_ppm(ucsi);
-	if (ret)
-		return ret;
-
-	mutex_lock(&ucsi->ppm_lock);
-
-	/* Enable basic notifications */
-	ctrl.cmd.cmd = UCSI_SET_NOTIFICATION_ENABLE;
-	ctrl.cmd.length = 0;
-	ctrl.cmd.data = UCSI_ENABLE_NTFY_CMD_COMPLETE | UCSI_ENABLE_NTFY_ERROR;
-	ret = ucsi_run_cmd(ucsi, &ctrl, NULL, 0);
-	if (ret)
-		goto err_reset;
-
-	/* Get PPM capabilities */
-	ctrl.cmd.cmd = UCSI_GET_CAPABILITY;
-	ret = ucsi_run_cmd(ucsi, &ctrl, &ucsi->cap, sizeof(ucsi->cap));
-	if (ret)
-		goto err_reset;
-
-	if (!ucsi->cap.num_connectors) {
-		ret = -ENODEV;
-		goto err_reset;
-	}
-
-	ucsi->connector = devm_kcalloc(ucsi->dev, ucsi->cap.num_connectors,
-				       sizeof(*ucsi->connector), GFP_KERNEL);
-	if (!ucsi->connector) {
-		ret = -ENOMEM;
-		goto err_reset;
-	}
-
-	for (i = 1, con = ucsi->connector; i < ucsi->cap.num_connectors + 1;
-	     i++, con++) {
-		/* Get connector capability */
-		ctrl.cmd.cmd = UCSI_GET_CONNECTOR_CAPABILITY;
-		ctrl.cmd.data = i;
-		ret = ucsi_run_cmd(ucsi, &ctrl, &con->cap, sizeof(con->cap));
-		if (ret)
-			goto err_reset;
-
-		con->num = i;
-		con->ucsi = ucsi;
-		INIT_WORK(&con->work, ucsi_connector_change);
-	}
-
-	/* Enable all notifications */
-	ctrl.cmd.cmd = UCSI_SET_NOTIFICATION_ENABLE;
-	ctrl.cmd.data = UCSI_ENABLE_NTFY_ALL;
-	ret = ucsi_run_cmd(ucsi, &ctrl, NULL, 0);
-	if (ret < 0)
-		goto err_reset;
-
-	mutex_unlock(&ucsi->ppm_lock);
-	return 0;
-err_reset:
-	ucsi_reset_ppm(ucsi);
-	mutex_unlock(&ucsi->ppm_lock);
-	return ret;
-}
-
-static int ucsi_acpi_probe(struct platform_device *pdev)
-{
-	struct resource *res;
-	acpi_status status;
-	struct ucsi *ucsi;
-	int ret;
-
-	ucsi = devm_kzalloc(&pdev->dev, sizeof(*ucsi), GFP_KERNEL);
-	if (!ucsi)
-		return -ENOMEM;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "missing memory resource\n");
-		return -ENODEV;
-	}
-
-	/*
-	 * NOTE: ACPI has claimed the memory region as it's also an Operation
-	 * Region. It's not possible to request it in the driver.
-	 */
-	ucsi->data = devm_ioremap(&pdev->dev, res->start, resource_size(res));
-	if (!ucsi->data)
-		return -ENOMEM;
-
-	ucsi->dev = &pdev->dev;
-
-	status = acpi_install_notify_handler(ACPI_HANDLE(&pdev->dev),
-					     ACPI_ALL_NOTIFY,
-					     ucsi_acpi_notify, ucsi);
-	if (ACPI_FAILURE(status))
-		return -ENODEV;
-
-	ret = ucsi_init(ucsi);
-	if (ret) {
-		acpi_remove_notify_handler(ACPI_HANDLE(&pdev->dev),
-					   ACPI_ALL_NOTIFY,
-					   ucsi_acpi_notify);
-		return ret;
-	}
-
-	platform_set_drvdata(pdev, ucsi);
-	return 0;
-}
-
-static int ucsi_acpi_remove(struct platform_device *pdev)
-{
-	struct ucsi *ucsi = platform_get_drvdata(pdev);
-
-	acpi_remove_notify_handler(ACPI_HANDLE(&pdev->dev),
-				   ACPI_ALL_NOTIFY, ucsi_acpi_notify);
-
-	/* Make sure there are no events in the middle of being processed */
-	if (wait_on_bit_timeout(&ucsi->flags, EVENT_PENDING,
-				TASK_UNINTERRUPTIBLE,
-				msecs_to_jiffies(UCSI_TIMEOUT_MS)))
-		dev_WARN(ucsi->dev, "%s: Events still pending\n", __func__);
-
-	ucsi_reset_ppm(ucsi);
-	return 0;
-}
-
-static const struct acpi_device_id ucsi_acpi_match[] = {
-	{ "PNP0CA0", 0 },
-	{ },
-};
-MODULE_DEVICE_TABLE(acpi, ucsi_acpi_match);
-
-static struct platform_driver ucsi_acpi_platform_driver = {
-	.driver = {
-		.name = "ucsi_acpi",
-		.acpi_match_table = ACPI_PTR(ucsi_acpi_match),
-	},
-	.probe = ucsi_acpi_probe,
-	.remove = ucsi_acpi_remove,
-};
-
-module_platform_driver(ucsi_acpi_platform_driver);
-
-MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("USB Type-C System Software Interface (UCSI) driver");