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Alex Dubov4020f2d2006-10-04 02:15:37 -07001/*
2 * tifm_core.c - TI FlashMedia driver
3 *
4 * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
5 *
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.
9 *
10 */
11
12#include <linux/tifm.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090013#include <linux/slab.h>
Alex Dubov4020f2d2006-10-04 02:15:37 -070014#include <linux/init.h>
15#include <linux/idr.h>
Paul Gortmakereb12a672011-07-03 15:14:56 -040016#include <linux/module.h>
Alex Dubov4020f2d2006-10-04 02:15:37 -070017
18#define DRIVER_NAME "tifm_core"
Alex Dubov4552f0c2007-04-12 16:59:12 +100019#define DRIVER_VERSION "0.8"
Alex Dubov4020f2d2006-10-04 02:15:37 -070020
Alex Dubov3540af82007-04-12 16:59:15 +100021static struct workqueue_struct *workqueue;
Alex Dubov4020f2d2006-10-04 02:15:37 -070022static DEFINE_IDR(tifm_adapter_idr);
23static DEFINE_SPINLOCK(tifm_adapter_lock);
24
Alex Dubove23f2b82007-04-12 16:59:14 +100025static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
Alex Dubov4020f2d2006-10-04 02:15:37 -070026{
Alex Dubove23f2b82007-04-12 16:59:14 +100027 const char *card_type_name[3][3] = {
28 { "SmartMedia/xD", "MemoryStick", "MMC/SD" },
29 { "XD", "MS", "SD"},
30 { "xd", "ms", "sd"}
31 };
32
33 if (nt > 2 || type < 1 || type > 3)
34 return NULL;
35 return card_type_name[nt][type - 1];
Alex Dubov4020f2d2006-10-04 02:15:37 -070036}
37
Alex Dubove23f2b82007-04-12 16:59:14 +100038static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
Alex Dubov4020f2d2006-10-04 02:15:37 -070039{
Alex Dubove23f2b82007-04-12 16:59:14 +100040 if (sock->type == id->type)
Alex Dubov4020f2d2006-10-04 02:15:37 -070041 return 1;
Alex Dubove23f2b82007-04-12 16:59:14 +100042 return 0;
43}
44
45static int tifm_bus_match(struct device *dev, struct device_driver *drv)
46{
47 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
48 struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
49 driver);
50 struct tifm_device_id *ids = fm_drv->id_table;
51
52 if (ids) {
53 while (ids->type) {
54 if (tifm_dev_match(sock, ids))
55 return 1;
56 ++ids;
57 }
58 }
59 return 0;
Alex Dubov4020f2d2006-10-04 02:15:37 -070060}
61
Kay Sievers7eff2e72007-08-14 15:15:12 +020062static int tifm_uevent(struct device *dev, struct kobj_uevent_env *env)
Alex Dubov4020f2d2006-10-04 02:15:37 -070063{
Alex Dubove23f2b82007-04-12 16:59:14 +100064 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
Alex Dubov4020f2d2006-10-04 02:15:37 -070065
Kay Sievers7eff2e72007-08-14 15:15:12 +020066 if (add_uevent_var(env, "TIFM_CARD_TYPE=%s", tifm_media_type_name(sock->type, 1)))
Alex Dubov4020f2d2006-10-04 02:15:37 -070067 return -ENOMEM;
68
69 return 0;
70}
71
Alex Dubov8dc4a612007-04-12 16:59:13 +100072static int tifm_device_probe(struct device *dev)
73{
74 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
75 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
76 driver);
77 int rc = -ENODEV;
78
79 get_device(dev);
80 if (dev->driver && drv->probe) {
81 rc = drv->probe(sock);
82 if (!rc)
83 return 0;
84 }
85 put_device(dev);
86 return rc;
87}
88
89static void tifm_dummy_event(struct tifm_dev *sock)
90{
91 return;
92}
93
94static int tifm_device_remove(struct device *dev)
95{
96 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
97 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
98 driver);
99
100 if (dev->driver && drv->remove) {
101 sock->card_event = tifm_dummy_event;
102 sock->data_event = tifm_dummy_event;
103 drv->remove(sock);
104 sock->dev.driver = NULL;
105 }
106
107 put_device(dev);
108 return 0;
109}
110
Alex Dubov41d78f742006-12-11 01:55:37 +1100111#ifdef CONFIG_PM
112
113static int tifm_device_suspend(struct device *dev, pm_message_t state)
114{
Alex Dubov91f8d012007-04-12 17:05:26 +1000115 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
Alex Dubov8dc4a612007-04-12 16:59:13 +1000116 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
117 driver);
Alex Dubov41d78f742006-12-11 01:55:37 +1100118
Alex Dubov8dc4a612007-04-12 16:59:13 +1000119 if (dev->driver && drv->suspend)
Alex Dubov91f8d012007-04-12 17:05:26 +1000120 return drv->suspend(sock, state);
Alex Dubov41d78f742006-12-11 01:55:37 +1100121 return 0;
122}
123
124static int tifm_device_resume(struct device *dev)
125{
Alex Dubov91f8d012007-04-12 17:05:26 +1000126 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
Alex Dubov8dc4a612007-04-12 16:59:13 +1000127 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
128 driver);
Alex Dubov41d78f742006-12-11 01:55:37 +1100129
Alex Dubov8dc4a612007-04-12 16:59:13 +1000130 if (dev->driver && drv->resume)
Alex Dubov91f8d012007-04-12 17:05:26 +1000131 return drv->resume(sock);
Alex Dubov41d78f742006-12-11 01:55:37 +1100132 return 0;
133}
134
135#else
136
137#define tifm_device_suspend NULL
138#define tifm_device_resume NULL
139
140#endif /* CONFIG_PM */
141
Alex Dubov4e64f222007-04-12 16:59:20 +1000142static ssize_t type_show(struct device *dev, struct device_attribute *attr,
143 char *buf)
144{
145 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
146 return sprintf(buf, "%x", sock->type);
147}
148
149static struct device_attribute tifm_dev_attrs[] = {
150 __ATTR(type, S_IRUGO, type_show, NULL),
151 __ATTR_NULL
152};
153
Alex Dubov4020f2d2006-10-04 02:15:37 -0700154static struct bus_type tifm_bus_type = {
Alex Dubov91f8d012007-04-12 17:05:26 +1000155 .name = "tifm",
156 .dev_attrs = tifm_dev_attrs,
157 .match = tifm_bus_match,
158 .uevent = tifm_uevent,
159 .probe = tifm_device_probe,
160 .remove = tifm_device_remove,
161 .suspend = tifm_device_suspend,
162 .resume = tifm_device_resume
Alex Dubov4020f2d2006-10-04 02:15:37 -0700163};
164
Tony Jones7dd817d2007-09-25 02:03:03 +0200165static void tifm_free(struct device *dev)
Alex Dubov4020f2d2006-10-04 02:15:37 -0700166{
Tony Jones7dd817d2007-09-25 02:03:03 +0200167 struct tifm_adapter *fm = container_of(dev, struct tifm_adapter, dev);
Alex Dubov4020f2d2006-10-04 02:15:37 -0700168
Alex Dubov4020f2d2006-10-04 02:15:37 -0700169 kfree(fm);
170}
171
172static struct class tifm_adapter_class = {
173 .name = "tifm_adapter",
Tony Jones7dd817d2007-09-25 02:03:03 +0200174 .dev_release = tifm_free
Alex Dubov4020f2d2006-10-04 02:15:37 -0700175};
176
Alex Dubov6113ed72007-04-12 16:59:17 +1000177struct tifm_adapter *tifm_alloc_adapter(unsigned int num_sockets,
178 struct device *dev)
Alex Dubov4020f2d2006-10-04 02:15:37 -0700179{
180 struct tifm_adapter *fm;
181
Alex Dubov6113ed72007-04-12 16:59:17 +1000182 fm = kzalloc(sizeof(struct tifm_adapter)
183 + sizeof(struct tifm_dev*) * num_sockets, GFP_KERNEL);
Alex Dubov4020f2d2006-10-04 02:15:37 -0700184 if (fm) {
Tony Jones7dd817d2007-09-25 02:03:03 +0200185 fm->dev.class = &tifm_adapter_class;
186 fm->dev.parent = dev;
187 device_initialize(&fm->dev);
Alex Dubov6113ed72007-04-12 16:59:17 +1000188 spin_lock_init(&fm->lock);
189 fm->num_sockets = num_sockets;
Alex Dubov4020f2d2006-10-04 02:15:37 -0700190 }
191 return fm;
192}
193EXPORT_SYMBOL(tifm_alloc_adapter);
194
Alex Dubov3540af82007-04-12 16:59:15 +1000195int tifm_add_adapter(struct tifm_adapter *fm)
Alex Dubov4020f2d2006-10-04 02:15:37 -0700196{
197 int rc;
198
199 if (!idr_pre_get(&tifm_adapter_idr, GFP_KERNEL))
200 return -ENOMEM;
201
202 spin_lock(&tifm_adapter_lock);
203 rc = idr_get_new(&tifm_adapter_idr, fm, &fm->id);
204 spin_unlock(&tifm_adapter_lock);
Alex Dubov6113ed72007-04-12 16:59:17 +1000205 if (rc)
206 return rc;
Alex Dubov4020f2d2006-10-04 02:15:37 -0700207
Kay Sievers0bad16a2009-01-06 10:44:35 -0800208 dev_set_name(&fm->dev, "tifm%u", fm->id);
Tony Jones7dd817d2007-09-25 02:03:03 +0200209 rc = device_add(&fm->dev);
Alex Dubov6113ed72007-04-12 16:59:17 +1000210 if (rc) {
211 spin_lock(&tifm_adapter_lock);
212 idr_remove(&tifm_adapter_idr, fm->id);
213 spin_unlock(&tifm_adapter_lock);
Alex Dubov4020f2d2006-10-04 02:15:37 -0700214 }
Alex Dubov6113ed72007-04-12 16:59:17 +1000215
Alex Dubov4020f2d2006-10-04 02:15:37 -0700216 return rc;
217}
218EXPORT_SYMBOL(tifm_add_adapter);
219
220void tifm_remove_adapter(struct tifm_adapter *fm)
221{
Alex Dubov6113ed72007-04-12 16:59:17 +1000222 unsigned int cnt;
223
Alex Dubov3540af82007-04-12 16:59:15 +1000224 flush_workqueue(workqueue);
Alex Dubov6113ed72007-04-12 16:59:17 +1000225 for (cnt = 0; cnt < fm->num_sockets; ++cnt) {
226 if (fm->sockets[cnt])
227 device_unregister(&fm->sockets[cnt]->dev);
228 }
Alex Dubov4020f2d2006-10-04 02:15:37 -0700229
230 spin_lock(&tifm_adapter_lock);
231 idr_remove(&tifm_adapter_idr, fm->id);
232 spin_unlock(&tifm_adapter_lock);
Tony Jones7dd817d2007-09-25 02:03:03 +0200233 device_del(&fm->dev);
Alex Dubov4020f2d2006-10-04 02:15:37 -0700234}
235EXPORT_SYMBOL(tifm_remove_adapter);
236
Alex Dubov6113ed72007-04-12 16:59:17 +1000237void tifm_free_adapter(struct tifm_adapter *fm)
238{
Tony Jones7dd817d2007-09-25 02:03:03 +0200239 put_device(&fm->dev);
Alex Dubov6113ed72007-04-12 16:59:17 +1000240}
241EXPORT_SYMBOL(tifm_free_adapter);
242
Alex Dubov4020f2d2006-10-04 02:15:37 -0700243void tifm_free_device(struct device *dev)
244{
Alex Dubov2428a8f2007-04-12 16:59:18 +1000245 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
246 kfree(sock);
Alex Dubov4020f2d2006-10-04 02:15:37 -0700247}
248EXPORT_SYMBOL(tifm_free_device);
249
Alex Dubov2428a8f2007-04-12 16:59:18 +1000250struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id,
251 unsigned char type)
Alex Dubov4020f2d2006-10-04 02:15:37 -0700252{
Alex Dubov2428a8f2007-04-12 16:59:18 +1000253 struct tifm_dev *sock = NULL;
Alex Dubov4020f2d2006-10-04 02:15:37 -0700254
Alex Dubov2428a8f2007-04-12 16:59:18 +1000255 if (!tifm_media_type_name(type, 0))
256 return sock;
Alex Dubov8e02f852006-12-08 16:50:51 +1100257
Alex Dubov2428a8f2007-04-12 16:59:18 +1000258 sock = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
259 if (sock) {
260 spin_lock_init(&sock->lock);
261 sock->type = type;
262 sock->socket_id = id;
263 sock->card_event = tifm_dummy_event;
264 sock->data_event = tifm_dummy_event;
265
Tony Jones7dd817d2007-09-25 02:03:03 +0200266 sock->dev.parent = fm->dev.parent;
Alex Dubov2428a8f2007-04-12 16:59:18 +1000267 sock->dev.bus = &tifm_bus_type;
Tony Jones7dd817d2007-09-25 02:03:03 +0200268 sock->dev.dma_mask = fm->dev.parent->dma_mask;
Alex Dubov2428a8f2007-04-12 16:59:18 +1000269 sock->dev.release = tifm_free_device;
270
Kay Sievers0bad16a2009-01-06 10:44:35 -0800271 dev_set_name(&sock->dev, "tifm_%s%u:%u",
272 tifm_media_type_name(type, 2), fm->id, id);
Alex Dubov2428a8f2007-04-12 16:59:18 +1000273 printk(KERN_INFO DRIVER_NAME
274 ": %s card detected in socket %u:%u\n",
275 tifm_media_type_name(type, 0), fm->id, id);
Alex Dubov4020f2d2006-10-04 02:15:37 -0700276 }
Alex Dubov2428a8f2007-04-12 16:59:18 +1000277 return sock;
Alex Dubov4020f2d2006-10-04 02:15:37 -0700278}
279EXPORT_SYMBOL(tifm_alloc_device);
280
281void tifm_eject(struct tifm_dev *sock)
282{
283 struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
284 fm->eject(fm, sock);
285}
286EXPORT_SYMBOL(tifm_eject);
287
Alex Dubovbaf85322008-02-09 10:20:54 -0800288int tifm_has_ms_pif(struct tifm_dev *sock)
289{
290 struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
291 return fm->has_ms_pif(fm, sock);
292}
293EXPORT_SYMBOL(tifm_has_ms_pif);
294
Alex Dubov4020f2d2006-10-04 02:15:37 -0700295int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
296 int direction)
297{
298 return pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
299}
300EXPORT_SYMBOL(tifm_map_sg);
301
302void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
303 int direction)
304{
305 pci_unmap_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
306}
307EXPORT_SYMBOL(tifm_unmap_sg);
308
Alex Dubov3540af82007-04-12 16:59:15 +1000309void tifm_queue_work(struct work_struct *work)
310{
311 queue_work(workqueue, work);
312}
313EXPORT_SYMBOL(tifm_queue_work);
314
Alex Dubov4020f2d2006-10-04 02:15:37 -0700315int tifm_register_driver(struct tifm_driver *drv)
316{
317 drv->driver.bus = &tifm_bus_type;
Alex Dubov4020f2d2006-10-04 02:15:37 -0700318
319 return driver_register(&drv->driver);
320}
321EXPORT_SYMBOL(tifm_register_driver);
322
323void tifm_unregister_driver(struct tifm_driver *drv)
324{
325 driver_unregister(&drv->driver);
326}
327EXPORT_SYMBOL(tifm_unregister_driver);
328
329static int __init tifm_init(void)
330{
Alex Dubov3540af82007-04-12 16:59:15 +1000331 int rc;
Alex Dubov4020f2d2006-10-04 02:15:37 -0700332
Tejun Heo58a69cb2011-02-16 09:25:31 +0100333 workqueue = create_freezable_workqueue("tifm");
Alex Dubov3540af82007-04-12 16:59:15 +1000334 if (!workqueue)
335 return -ENOMEM;
336
337 rc = bus_register(&tifm_bus_type);
338
339 if (rc)
340 goto err_out_wq;
341
342 rc = class_register(&tifm_adapter_class);
343 if (!rc)
344 return 0;
345
346 bus_unregister(&tifm_bus_type);
347
348err_out_wq:
349 destroy_workqueue(workqueue);
Alex Dubov4020f2d2006-10-04 02:15:37 -0700350
351 return rc;
352}
353
354static void __exit tifm_exit(void)
355{
356 class_unregister(&tifm_adapter_class);
357 bus_unregister(&tifm_bus_type);
Alex Dubov3540af82007-04-12 16:59:15 +1000358 destroy_workqueue(workqueue);
Alex Dubov4020f2d2006-10-04 02:15:37 -0700359}
360
361subsys_initcall(tifm_init);
362module_exit(tifm_exit);
363
364MODULE_LICENSE("GPL");
365MODULE_AUTHOR("Alex Dubov");
366MODULE_DESCRIPTION("TI FlashMedia core driver");
367MODULE_LICENSE("GPL");
368MODULE_VERSION(DRIVER_VERSION);