Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 316 insertions, 0 deletions

diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
new file mode 100644
index 0000000000..46c534f6b1
--- /dev/null
+++ b/drivers/pnp/driver.c
@@ -0,0 +1,316 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * driver.c - device id matching, driver model, etc.
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ */
+
+#include <linux/string.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/pnp.h>
+#include "base.h"
+
+static int compare_func(const char *ida, const char *idb)
+{
+	int i;
+
+	/* we only need to compare the last 4 chars */
+	for (i = 3; i < 7; i++) {
+		if (ida[i] != 'X' &&
+		    idb[i] != 'X' && toupper(ida[i]) != toupper(idb[i]))
+			return 0;
+	}
+	return 1;
+}
+
+int compare_pnp_id(struct pnp_id *pos, const char *id)
+{
+	if (!pos || !id || (strlen(id) != 7))
+		return 0;
+	if (memcmp(id, "ANYDEVS", 7) == 0)
+		return 1;
+	while (pos) {
+		if (memcmp(pos->id, id, 3) == 0)
+			if (compare_func(pos->id, id) == 1)
+				return 1;
+		pos = pos->next;
+	}
+	return 0;
+}
+
+static const struct pnp_device_id *match_device(struct pnp_driver *drv,
+						struct pnp_dev *dev)
+{
+	const struct pnp_device_id *drv_id = drv->id_table;
+
+	if (!drv_id)
+		return NULL;
+
+	while (*drv_id->id) {
+		if (compare_pnp_id(dev->id, drv_id->id))
+			return drv_id;
+		drv_id++;
+	}
+	return NULL;
+}
+
+int pnp_device_attach(struct pnp_dev *pnp_dev)
+{
+	mutex_lock(&pnp_lock);
+	if (pnp_dev->status != PNP_READY) {
+		mutex_unlock(&pnp_lock);
+		return -EBUSY;
+	}
+	pnp_dev->status = PNP_ATTACHED;
+	mutex_unlock(&pnp_lock);
+	return 0;
+}
+EXPORT_SYMBOL(pnp_device_attach);
+
+void pnp_device_detach(struct pnp_dev *pnp_dev)
+{
+	mutex_lock(&pnp_lock);
+	if (pnp_dev->status == PNP_ATTACHED)
+		pnp_dev->status = PNP_READY;
+	mutex_unlock(&pnp_lock);
+}
+EXPORT_SYMBOL(pnp_device_detach);
+
+static int pnp_device_probe(struct device *dev)
+{
+	int error;
+	struct pnp_driver *pnp_drv;
+	struct pnp_dev *pnp_dev;
+	const struct pnp_device_id *dev_id = NULL;
+	pnp_dev = to_pnp_dev(dev);
+	pnp_drv = to_pnp_driver(dev->driver);
+
+	error = pnp_device_attach(pnp_dev);
+	if (error < 0)
+		return error;
+
+	if (pnp_dev->active == 0) {
+		if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {
+			error = pnp_activate_dev(pnp_dev);
+			if (error < 0)
+				return error;
+		}
+	} else if ((pnp_drv->flags & PNP_DRIVER_RES_DISABLE)
+		   == PNP_DRIVER_RES_DISABLE) {
+		error = pnp_disable_dev(pnp_dev);
+		if (error < 0)
+			return error;
+	}
+	error = 0;
+	if (pnp_drv->probe) {
+		dev_id = match_device(pnp_drv, pnp_dev);
+		if (dev_id != NULL)
+			error = pnp_drv->probe(pnp_dev, dev_id);
+	}
+	if (error >= 0) {
+		pnp_dev->driver = pnp_drv;
+		error = 0;
+	} else
+		goto fail;
+
+	return error;
+
+fail:
+	pnp_device_detach(pnp_dev);
+	return error;
+}
+
+static void pnp_device_remove(struct device *dev)
+{
+	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+	struct pnp_driver *drv = pnp_dev->driver;
+
+	if (drv) {
+		if (drv->remove)
+			drv->remove(pnp_dev);
+		pnp_dev->driver = NULL;
+	}
+
+	if (pnp_dev->active &&
+	    (!drv || !(drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)))
+		pnp_disable_dev(pnp_dev);
+
+	pnp_device_detach(pnp_dev);
+}
+
+static void pnp_device_shutdown(struct device *dev)
+{
+	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+	struct pnp_driver *drv = pnp_dev->driver;
+
+	if (drv && drv->shutdown)
+		drv->shutdown(pnp_dev);
+}
+
+static int pnp_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+	struct pnp_driver *pnp_drv = to_pnp_driver(drv);
+
+	if (match_device(pnp_drv, pnp_dev) == NULL)
+		return 0;
+	return 1;
+}
+
+static int __pnp_bus_suspend(struct device *dev, pm_message_t state)
+{
+	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+	struct pnp_driver *pnp_drv = pnp_dev->driver;
+	int error;
+
+	if (!pnp_drv)
+		return 0;
+
+	if (pnp_drv->driver.pm && pnp_drv->driver.pm->suspend) {
+		error = pnp_drv->driver.pm->suspend(dev);
+		suspend_report_result(dev, pnp_drv->driver.pm->suspend, error);
+		if (error)
+			return error;
+	}
+
+	if (pnp_drv->suspend) {
+		error = pnp_drv->suspend(pnp_dev, state);
+		if (error)
+			return error;
+	}
+
+	/* can_write is necessary to be able to re-start the device on resume */
+	if (pnp_can_disable(pnp_dev) && pnp_can_write(pnp_dev)) {
+		error = pnp_stop_dev(pnp_dev);
+		if (error)
+			return error;
+	}
+
+	if (pnp_can_suspend(pnp_dev))
+		pnp_dev->protocol->suspend(pnp_dev, state);
+	return 0;
+}
+
+static int pnp_bus_suspend(struct device *dev)
+{
+	return __pnp_bus_suspend(dev, PMSG_SUSPEND);
+}
+
+static int pnp_bus_freeze(struct device *dev)
+{
+	return __pnp_bus_suspend(dev, PMSG_FREEZE);
+}
+
+static int pnp_bus_poweroff(struct device *dev)
+{
+	return __pnp_bus_suspend(dev, PMSG_HIBERNATE);
+}
+
+static int pnp_bus_resume(struct device *dev)
+{
+	struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+	struct pnp_driver *pnp_drv = pnp_dev->driver;
+	int error;
+
+	if (!pnp_drv)
+		return 0;
+
+	if (pnp_dev->protocol->resume) {
+		error = pnp_dev->protocol->resume(pnp_dev);
+		if (error)
+			return error;
+	}
+
+	if (pnp_can_write(pnp_dev)) {
+		error = pnp_start_dev(pnp_dev);
+		if (error)
+			return error;
+	}
+
+	if (pnp_drv->driver.pm && pnp_drv->driver.pm->resume) {
+		error = pnp_drv->driver.pm->resume(dev);
+		if (error)
+			return error;
+	}
+
+	if (pnp_drv->resume) {
+		error = pnp_drv->resume(pnp_dev);
+		if (error)
+			return error;
+	}
+
+	return 0;
+}
+
+static const struct dev_pm_ops pnp_bus_dev_pm_ops = {
+	/* Suspend callbacks */
+	.suspend = pnp_bus_suspend,
+	.resume = pnp_bus_resume,
+	/* Hibernate callbacks */
+	.freeze = pnp_bus_freeze,
+	.thaw = pnp_bus_resume,
+	.poweroff = pnp_bus_poweroff,
+	.restore = pnp_bus_resume,
+};
+
+struct bus_type pnp_bus_type = {
+	.name    = "pnp",
+	.match   = pnp_bus_match,
+	.probe   = pnp_device_probe,
+	.remove  = pnp_device_remove,
+	.shutdown = pnp_device_shutdown,
+	.pm	 = &pnp_bus_dev_pm_ops,
+	.dev_groups = pnp_dev_groups,
+};
+
+int pnp_register_driver(struct pnp_driver *drv)
+{
+	drv->driver.name = drv->name;
+	drv->driver.bus = &pnp_bus_type;
+
+	return driver_register(&drv->driver);
+}
+EXPORT_SYMBOL(pnp_register_driver);
+
+void pnp_unregister_driver(struct pnp_driver *drv)
+{
+	driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL(pnp_unregister_driver);
+
+/**
+ * pnp_add_id - adds an EISA id to the specified device
+ * @dev: pointer to the desired device
+ * @id: pointer to an EISA id string
+ */
+struct pnp_id *pnp_add_id(struct pnp_dev *dev, const char *id)
+{
+	struct pnp_id *dev_id, *ptr;
+
+	dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
+	if (!dev_id)
+		return NULL;
+
+	dev_id->id[0] = id[0];
+	dev_id->id[1] = id[1];
+	dev_id->id[2] = id[2];
+	dev_id->id[3] = tolower(id[3]);
+	dev_id->id[4] = tolower(id[4]);
+	dev_id->id[5] = tolower(id[5]);
+	dev_id->id[6] = tolower(id[6]);
+	dev_id->id[7] = '\0';
+
+	dev_id->next = NULL;
+	ptr = dev->id;
+	while (ptr && ptr->next)
+		ptr = ptr->next;
+	if (ptr)
+		ptr->next = dev_id;
+	else
+		dev->id = dev_id;
+
+	return dev_id;
+}