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2a81ada32f
The uevent() callback in struct bus_type should not be modifying the device that is passed into it, so mark it as a const * and propagate the function signature changes out into all relevant subsystems that use this callback. Acked-by: Rafael J. Wysocki <rafael@kernel.org> Acked-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20230111113018.459199-16-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
367 lines
8.1 KiB
C
367 lines
8.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* tifm_core.c - TI FlashMedia driver
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*
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* Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
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*/
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#include <linux/tifm.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/idr.h>
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#include <linux/module.h>
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#define DRIVER_NAME "tifm_core"
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#define DRIVER_VERSION "0.8"
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static struct workqueue_struct *workqueue;
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static DEFINE_IDR(tifm_adapter_idr);
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static DEFINE_SPINLOCK(tifm_adapter_lock);
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static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
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{
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const char *card_type_name[3][3] = {
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{ "SmartMedia/xD", "MemoryStick", "MMC/SD" },
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{ "XD", "MS", "SD"},
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{ "xd", "ms", "sd"}
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};
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if (nt > 2 || type < 1 || type > 3)
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return NULL;
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return card_type_name[nt][type - 1];
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}
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static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
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{
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if (sock->type == id->type)
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return 1;
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return 0;
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}
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static int tifm_bus_match(struct device *dev, struct device_driver *drv)
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{
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struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
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struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
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driver);
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struct tifm_device_id *ids = fm_drv->id_table;
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if (ids) {
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while (ids->type) {
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if (tifm_dev_match(sock, ids))
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return 1;
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++ids;
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}
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}
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return 0;
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}
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static int tifm_uevent(const struct device *dev, struct kobj_uevent_env *env)
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{
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const struct tifm_dev *sock = container_of_const(dev, struct tifm_dev, dev);
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if (add_uevent_var(env, "TIFM_CARD_TYPE=%s", tifm_media_type_name(sock->type, 1)))
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return -ENOMEM;
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return 0;
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}
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static int tifm_device_probe(struct device *dev)
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{
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struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
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struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
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driver);
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int rc = -ENODEV;
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get_device(dev);
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if (dev->driver && drv->probe) {
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rc = drv->probe(sock);
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if (!rc)
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return 0;
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}
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put_device(dev);
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return rc;
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}
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static void tifm_dummy_event(struct tifm_dev *sock)
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{
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return;
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}
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static void tifm_device_remove(struct device *dev)
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{
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struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
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struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
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driver);
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if (dev->driver && drv->remove) {
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sock->card_event = tifm_dummy_event;
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sock->data_event = tifm_dummy_event;
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drv->remove(sock);
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sock->dev.driver = NULL;
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}
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put_device(dev);
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}
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#ifdef CONFIG_PM
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static int tifm_device_suspend(struct device *dev, pm_message_t state)
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{
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struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
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struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
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driver);
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if (dev->driver && drv->suspend)
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return drv->suspend(sock, state);
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return 0;
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}
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static int tifm_device_resume(struct device *dev)
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{
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struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
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struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
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driver);
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if (dev->driver && drv->resume)
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return drv->resume(sock);
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return 0;
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}
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#else
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#define tifm_device_suspend NULL
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#define tifm_device_resume NULL
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#endif /* CONFIG_PM */
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static ssize_t type_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
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return sprintf(buf, "%x", sock->type);
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}
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static DEVICE_ATTR_RO(type);
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static struct attribute *tifm_dev_attrs[] = {
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&dev_attr_type.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(tifm_dev);
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static struct bus_type tifm_bus_type = {
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.name = "tifm",
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.dev_groups = tifm_dev_groups,
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.match = tifm_bus_match,
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.uevent = tifm_uevent,
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.probe = tifm_device_probe,
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.remove = tifm_device_remove,
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.suspend = tifm_device_suspend,
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.resume = tifm_device_resume
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};
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static void tifm_free(struct device *dev)
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{
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struct tifm_adapter *fm = container_of(dev, struct tifm_adapter, dev);
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kfree(fm);
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}
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static struct class tifm_adapter_class = {
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.name = "tifm_adapter",
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.dev_release = tifm_free
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};
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struct tifm_adapter *tifm_alloc_adapter(unsigned int num_sockets,
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struct device *dev)
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{
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struct tifm_adapter *fm;
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fm = kzalloc(struct_size(fm, sockets, num_sockets), GFP_KERNEL);
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if (fm) {
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fm->dev.class = &tifm_adapter_class;
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fm->dev.parent = dev;
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device_initialize(&fm->dev);
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spin_lock_init(&fm->lock);
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fm->num_sockets = num_sockets;
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}
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return fm;
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}
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EXPORT_SYMBOL(tifm_alloc_adapter);
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int tifm_add_adapter(struct tifm_adapter *fm)
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{
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int rc;
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idr_preload(GFP_KERNEL);
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spin_lock(&tifm_adapter_lock);
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rc = idr_alloc(&tifm_adapter_idr, fm, 0, 0, GFP_NOWAIT);
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if (rc >= 0)
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fm->id = rc;
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spin_unlock(&tifm_adapter_lock);
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idr_preload_end();
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if (rc < 0)
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return rc;
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dev_set_name(&fm->dev, "tifm%u", fm->id);
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rc = device_add(&fm->dev);
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if (rc) {
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spin_lock(&tifm_adapter_lock);
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idr_remove(&tifm_adapter_idr, fm->id);
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spin_unlock(&tifm_adapter_lock);
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}
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return rc;
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}
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EXPORT_SYMBOL(tifm_add_adapter);
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void tifm_remove_adapter(struct tifm_adapter *fm)
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{
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unsigned int cnt;
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flush_workqueue(workqueue);
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for (cnt = 0; cnt < fm->num_sockets; ++cnt) {
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if (fm->sockets[cnt])
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device_unregister(&fm->sockets[cnt]->dev);
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}
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spin_lock(&tifm_adapter_lock);
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idr_remove(&tifm_adapter_idr, fm->id);
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spin_unlock(&tifm_adapter_lock);
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device_del(&fm->dev);
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}
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EXPORT_SYMBOL(tifm_remove_adapter);
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void tifm_free_adapter(struct tifm_adapter *fm)
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{
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put_device(&fm->dev);
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}
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EXPORT_SYMBOL(tifm_free_adapter);
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void tifm_free_device(struct device *dev)
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{
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struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
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kfree(sock);
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}
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EXPORT_SYMBOL(tifm_free_device);
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struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id,
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unsigned char type)
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{
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struct tifm_dev *sock = NULL;
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if (!tifm_media_type_name(type, 0))
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return sock;
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sock = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
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if (sock) {
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spin_lock_init(&sock->lock);
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sock->type = type;
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sock->socket_id = id;
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sock->card_event = tifm_dummy_event;
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sock->data_event = tifm_dummy_event;
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sock->dev.parent = fm->dev.parent;
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sock->dev.bus = &tifm_bus_type;
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sock->dev.dma_mask = fm->dev.parent->dma_mask;
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sock->dev.release = tifm_free_device;
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dev_set_name(&sock->dev, "tifm_%s%u:%u",
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tifm_media_type_name(type, 2), fm->id, id);
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printk(KERN_INFO DRIVER_NAME
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": %s card detected in socket %u:%u\n",
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tifm_media_type_name(type, 0), fm->id, id);
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}
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return sock;
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}
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EXPORT_SYMBOL(tifm_alloc_device);
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void tifm_eject(struct tifm_dev *sock)
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{
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struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
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fm->eject(fm, sock);
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}
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EXPORT_SYMBOL(tifm_eject);
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int tifm_has_ms_pif(struct tifm_dev *sock)
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{
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struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
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return fm->has_ms_pif(fm, sock);
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}
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EXPORT_SYMBOL(tifm_has_ms_pif);
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int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
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int direction)
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{
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return dma_map_sg(&to_pci_dev(sock->dev.parent)->dev, sg, nents,
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direction);
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}
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EXPORT_SYMBOL(tifm_map_sg);
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void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
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int direction)
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{
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dma_unmap_sg(&to_pci_dev(sock->dev.parent)->dev, sg, nents, direction);
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}
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EXPORT_SYMBOL(tifm_unmap_sg);
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void tifm_queue_work(struct work_struct *work)
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{
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queue_work(workqueue, work);
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}
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EXPORT_SYMBOL(tifm_queue_work);
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int tifm_register_driver(struct tifm_driver *drv)
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{
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drv->driver.bus = &tifm_bus_type;
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return driver_register(&drv->driver);
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}
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EXPORT_SYMBOL(tifm_register_driver);
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void tifm_unregister_driver(struct tifm_driver *drv)
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{
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driver_unregister(&drv->driver);
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}
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EXPORT_SYMBOL(tifm_unregister_driver);
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static int __init tifm_init(void)
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{
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int rc;
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workqueue = create_freezable_workqueue("tifm");
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if (!workqueue)
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return -ENOMEM;
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rc = bus_register(&tifm_bus_type);
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if (rc)
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goto err_out_wq;
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rc = class_register(&tifm_adapter_class);
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if (!rc)
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return 0;
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bus_unregister(&tifm_bus_type);
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err_out_wq:
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destroy_workqueue(workqueue);
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return rc;
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}
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static void __exit tifm_exit(void)
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{
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class_unregister(&tifm_adapter_class);
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bus_unregister(&tifm_bus_type);
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destroy_workqueue(workqueue);
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}
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subsys_initcall(tifm_init);
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module_exit(tifm_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Alex Dubov");
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MODULE_DESCRIPTION("TI FlashMedia core driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRIVER_VERSION);
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