2 * tifm_core.c - TI FlashMedia driver
4 * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
12 #include <linux/tifm.h>
13 #include <linux/init.h>
14 #include <linux/idr.h>
16 #define DRIVER_NAME "tifm_core"
17 #define DRIVER_VERSION "0.8"
19 static DEFINE_IDR(tifm_adapter_idr);
20 static DEFINE_SPINLOCK(tifm_adapter_lock);
22 static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
24 const char *card_type_name[3][3] = {
25 { "SmartMedia/xD", "MemoryStick", "MMC/SD" },
30 if (nt > 2 || type < 1 || type > 3)
32 return card_type_name[nt][type - 1];
35 static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
37 if (sock->type == id->type)
42 static int tifm_bus_match(struct device *dev, struct device_driver *drv)
44 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
45 struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
47 struct tifm_device_id *ids = fm_drv->id_table;
51 if (tifm_dev_match(sock, ids))
59 static int tifm_uevent(struct device *dev, char **envp, int num_envp,
60 char *buffer, int buffer_size)
62 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
66 if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
68 tifm_media_type_name(sock->type, 1)))
74 static int tifm_device_probe(struct device *dev)
76 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
77 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
82 if (dev->driver && drv->probe) {
83 rc = drv->probe(sock);
91 static void tifm_dummy_event(struct tifm_dev *sock)
96 static int tifm_device_remove(struct device *dev)
98 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
99 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
102 if (dev->driver && drv->remove) {
103 sock->card_event = tifm_dummy_event;
104 sock->data_event = tifm_dummy_event;
106 sock->dev.driver = NULL;
115 static int tifm_device_suspend(struct device *dev, pm_message_t state)
117 struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev);
118 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
121 if (dev->driver && drv->suspend)
122 return drv->suspend(fm_dev, state);
126 static int tifm_device_resume(struct device *dev)
128 struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev);
129 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
132 if (dev->driver && drv->resume)
133 return drv->resume(fm_dev);
139 #define tifm_device_suspend NULL
140 #define tifm_device_resume NULL
142 #endif /* CONFIG_PM */
144 static struct bus_type tifm_bus_type = {
146 .match = tifm_bus_match,
147 .uevent = tifm_uevent,
148 .probe = tifm_device_probe,
149 .remove = tifm_device_remove,
150 .suspend = tifm_device_suspend,
151 .resume = tifm_device_resume
154 static void tifm_free(struct class_device *cdev)
156 struct tifm_adapter *fm = container_of(cdev, struct tifm_adapter, cdev);
162 static struct class tifm_adapter_class = {
163 .name = "tifm_adapter",
167 struct tifm_adapter *tifm_alloc_adapter(void)
169 struct tifm_adapter *fm;
171 fm = kzalloc(sizeof(struct tifm_adapter), GFP_KERNEL);
173 fm->cdev.class = &tifm_adapter_class;
174 spin_lock_init(&fm->lock);
175 class_device_initialize(&fm->cdev);
179 EXPORT_SYMBOL(tifm_alloc_adapter);
181 void tifm_free_adapter(struct tifm_adapter *fm)
183 class_device_put(&fm->cdev);
185 EXPORT_SYMBOL(tifm_free_adapter);
187 int tifm_add_adapter(struct tifm_adapter *fm,
188 int (*mediathreadfn)(void *data))
192 if (!idr_pre_get(&tifm_adapter_idr, GFP_KERNEL))
195 spin_lock(&tifm_adapter_lock);
196 rc = idr_get_new(&tifm_adapter_idr, fm, &fm->id);
197 spin_unlock(&tifm_adapter_lock);
199 snprintf(fm->cdev.class_id, BUS_ID_SIZE, "tifm%u", fm->id);
200 fm->media_switcher = kthread_create(mediathreadfn,
201 fm, "tifm/%u", fm->id);
203 if (!IS_ERR(fm->media_switcher))
204 return class_device_add(&fm->cdev);
206 spin_lock(&tifm_adapter_lock);
207 idr_remove(&tifm_adapter_idr, fm->id);
208 spin_unlock(&tifm_adapter_lock);
213 EXPORT_SYMBOL(tifm_add_adapter);
215 void tifm_remove_adapter(struct tifm_adapter *fm)
217 class_device_del(&fm->cdev);
219 spin_lock(&tifm_adapter_lock);
220 idr_remove(&tifm_adapter_idr, fm->id);
221 spin_unlock(&tifm_adapter_lock);
223 EXPORT_SYMBOL(tifm_remove_adapter);
225 void tifm_free_device(struct device *dev)
227 struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev);
230 EXPORT_SYMBOL(tifm_free_device);
232 struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm)
234 struct tifm_dev *dev = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
237 spin_lock_init(&dev->lock);
239 dev->dev.parent = fm->dev;
240 dev->dev.bus = &tifm_bus_type;
241 dev->dev.release = tifm_free_device;
242 dev->card_event = tifm_dummy_event;
243 dev->data_event = tifm_dummy_event;
247 EXPORT_SYMBOL(tifm_alloc_device);
249 void tifm_eject(struct tifm_dev *sock)
251 struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
254 EXPORT_SYMBOL(tifm_eject);
256 int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
259 return pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
261 EXPORT_SYMBOL(tifm_map_sg);
263 void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
266 pci_unmap_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
268 EXPORT_SYMBOL(tifm_unmap_sg);
270 int tifm_register_driver(struct tifm_driver *drv)
272 drv->driver.bus = &tifm_bus_type;
274 return driver_register(&drv->driver);
276 EXPORT_SYMBOL(tifm_register_driver);
278 void tifm_unregister_driver(struct tifm_driver *drv)
280 driver_unregister(&drv->driver);
282 EXPORT_SYMBOL(tifm_unregister_driver);
284 static int __init tifm_init(void)
286 int rc = bus_register(&tifm_bus_type);
289 rc = class_register(&tifm_adapter_class);
291 bus_unregister(&tifm_bus_type);
297 static void __exit tifm_exit(void)
299 class_unregister(&tifm_adapter_class);
300 bus_unregister(&tifm_bus_type);
303 subsys_initcall(tifm_init);
304 module_exit(tifm_exit);
306 MODULE_LICENSE("GPL");
307 MODULE_AUTHOR("Alex Dubov");
308 MODULE_DESCRIPTION("TI FlashMedia core driver");
309 MODULE_LICENSE("GPL");
310 MODULE_VERSION(DRIVER_VERSION);