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 struct workqueue_struct *workqueue;
20 static DEFINE_IDR(tifm_adapter_idr);
21 static DEFINE_SPINLOCK(tifm_adapter_lock);
23 static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
25 const char *card_type_name[3][3] = {
26 { "SmartMedia/xD", "MemoryStick", "MMC/SD" },
31 if (nt > 2 || type < 1 || type > 3)
33 return card_type_name[nt][type - 1];
36 static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
38 if (sock->type == id->type)
43 static int tifm_bus_match(struct device *dev, struct device_driver *drv)
45 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
46 struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
48 struct tifm_device_id *ids = fm_drv->id_table;
52 if (tifm_dev_match(sock, ids))
60 static int tifm_uevent(struct device *dev, char **envp, int num_envp,
61 char *buffer, int buffer_size)
63 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
67 if (add_uevent_var(envp, num_envp, &i, buffer, buffer_size, &length,
69 tifm_media_type_name(sock->type, 1)))
75 static int tifm_device_probe(struct device *dev)
77 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
78 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
83 if (dev->driver && drv->probe) {
84 rc = drv->probe(sock);
92 static void tifm_dummy_event(struct tifm_dev *sock)
97 static int tifm_device_remove(struct device *dev)
99 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
100 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
103 if (dev->driver && drv->remove) {
104 sock->card_event = tifm_dummy_event;
105 sock->data_event = tifm_dummy_event;
107 sock->dev.driver = NULL;
116 static int tifm_device_suspend(struct device *dev, pm_message_t state)
118 struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev);
119 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
122 if (dev->driver && drv->suspend)
123 return drv->suspend(fm_dev, state);
127 static int tifm_device_resume(struct device *dev)
129 struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev);
130 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
133 if (dev->driver && drv->resume)
134 return drv->resume(fm_dev);
140 #define tifm_device_suspend NULL
141 #define tifm_device_resume NULL
143 #endif /* CONFIG_PM */
145 static struct bus_type tifm_bus_type = {
147 .match = tifm_bus_match,
148 .uevent = tifm_uevent,
149 .probe = tifm_device_probe,
150 .remove = tifm_device_remove,
151 .suspend = tifm_device_suspend,
152 .resume = tifm_device_resume
155 static void tifm_free(struct class_device *cdev)
157 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(unsigned int num_sockets,
170 struct tifm_adapter *fm;
172 fm = kzalloc(sizeof(struct tifm_adapter)
173 + sizeof(struct tifm_dev*) * num_sockets, GFP_KERNEL);
175 fm->cdev.class = &tifm_adapter_class;
177 class_device_initialize(&fm->cdev);
178 spin_lock_init(&fm->lock);
179 fm->num_sockets = num_sockets;
183 EXPORT_SYMBOL(tifm_alloc_adapter);
185 int tifm_add_adapter(struct tifm_adapter *fm)
189 if (!idr_pre_get(&tifm_adapter_idr, GFP_KERNEL))
192 spin_lock(&tifm_adapter_lock);
193 rc = idr_get_new(&tifm_adapter_idr, fm, &fm->id);
194 spin_unlock(&tifm_adapter_lock);
198 snprintf(fm->cdev.class_id, BUS_ID_SIZE, "tifm%u", fm->id);
199 rc = class_device_add(&fm->cdev);
201 spin_lock(&tifm_adapter_lock);
202 idr_remove(&tifm_adapter_idr, fm->id);
203 spin_unlock(&tifm_adapter_lock);
208 EXPORT_SYMBOL(tifm_add_adapter);
210 void tifm_remove_adapter(struct tifm_adapter *fm)
214 flush_workqueue(workqueue);
215 for (cnt = 0; cnt < fm->num_sockets; ++cnt) {
216 if (fm->sockets[cnt])
217 device_unregister(&fm->sockets[cnt]->dev);
220 spin_lock(&tifm_adapter_lock);
221 idr_remove(&tifm_adapter_idr, fm->id);
222 spin_unlock(&tifm_adapter_lock);
223 class_device_del(&fm->cdev);
225 EXPORT_SYMBOL(tifm_remove_adapter);
227 void tifm_free_adapter(struct tifm_adapter *fm)
229 class_device_put(&fm->cdev);
231 EXPORT_SYMBOL(tifm_free_adapter);
233 void tifm_free_device(struct device *dev)
235 struct tifm_dev *fm_dev = container_of(dev, struct tifm_dev, dev);
238 EXPORT_SYMBOL(tifm_free_device);
240 struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm)
242 struct tifm_dev *dev = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
245 spin_lock_init(&dev->lock);
247 dev->dev.parent = fm->cdev.dev;
248 dev->dev.bus = &tifm_bus_type;
249 dev->dev.release = tifm_free_device;
250 dev->card_event = tifm_dummy_event;
251 dev->data_event = tifm_dummy_event;
255 EXPORT_SYMBOL(tifm_alloc_device);
257 void tifm_eject(struct tifm_dev *sock)
259 struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
262 EXPORT_SYMBOL(tifm_eject);
264 int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
267 return pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
269 EXPORT_SYMBOL(tifm_map_sg);
271 void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
274 pci_unmap_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
276 EXPORT_SYMBOL(tifm_unmap_sg);
278 void tifm_queue_work(struct work_struct *work)
280 queue_work(workqueue, work);
282 EXPORT_SYMBOL(tifm_queue_work);
284 int tifm_register_driver(struct tifm_driver *drv)
286 drv->driver.bus = &tifm_bus_type;
288 return driver_register(&drv->driver);
290 EXPORT_SYMBOL(tifm_register_driver);
292 void tifm_unregister_driver(struct tifm_driver *drv)
294 driver_unregister(&drv->driver);
296 EXPORT_SYMBOL(tifm_unregister_driver);
298 static int __init tifm_init(void)
302 workqueue = create_freezeable_workqueue("tifm");
306 rc = bus_register(&tifm_bus_type);
311 rc = class_register(&tifm_adapter_class);
315 bus_unregister(&tifm_bus_type);
318 destroy_workqueue(workqueue);
323 static void __exit tifm_exit(void)
325 class_unregister(&tifm_adapter_class);
326 bus_unregister(&tifm_bus_type);
327 destroy_workqueue(workqueue);
330 subsys_initcall(tifm_init);
331 module_exit(tifm_exit);
333 MODULE_LICENSE("GPL");
334 MODULE_AUTHOR("Alex Dubov");
335 MODULE_DESCRIPTION("TI FlashMedia core driver");
336 MODULE_LICENSE("GPL");
337 MODULE_VERSION(DRIVER_VERSION);