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366 lines
8.1 KiB
366 lines
8.1 KiB
// 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 <[email protected]> |
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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(struct device *dev, struct kobj_uevent_env *env) |
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{ |
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struct tifm_dev *sock = container_of(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(sizeof(struct tifm_adapter) |
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+ sizeof(struct tifm_dev*) * 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 pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, 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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pci_unmap_sg(to_pci_dev(sock->dev.parent), 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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