Loading...
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * tifm_core.c - TI FlashMedia driver
4 *
5 * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
6 */
7
8#include <linux/tifm.h>
9#include <linux/slab.h>
10#include <linux/init.h>
11#include <linux/idr.h>
12#include <linux/module.h>
13
14#define DRIVER_NAME "tifm_core"
15#define DRIVER_VERSION "0.8"
16
17static struct workqueue_struct *workqueue;
18static DEFINE_IDR(tifm_adapter_idr);
19static DEFINE_SPINLOCK(tifm_adapter_lock);
20
21static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
22{
23 const char *card_type_name[3][3] = {
24 { "SmartMedia/xD", "MemoryStick", "MMC/SD" },
25 { "XD", "MS", "SD"},
26 { "xd", "ms", "sd"}
27 };
28
29 if (nt > 2 || type < 1 || type > 3)
30 return NULL;
31 return card_type_name[nt][type - 1];
32}
33
34static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
35{
36 if (sock->type == id->type)
37 return 1;
38 return 0;
39}
40
41static int tifm_bus_match(struct device *dev, struct device_driver *drv)
42{
43 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
44 struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
45 driver);
46 struct tifm_device_id *ids = fm_drv->id_table;
47
48 if (ids) {
49 while (ids->type) {
50 if (tifm_dev_match(sock, ids))
51 return 1;
52 ++ids;
53 }
54 }
55 return 0;
56}
57
58static int tifm_uevent(const struct device *dev, struct kobj_uevent_env *env)
59{
60 const struct tifm_dev *sock = container_of_const(dev, struct tifm_dev, dev);
61
62 if (add_uevent_var(env, "TIFM_CARD_TYPE=%s", tifm_media_type_name(sock->type, 1)))
63 return -ENOMEM;
64
65 return 0;
66}
67
68static int tifm_device_probe(struct device *dev)
69{
70 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
71 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
72 driver);
73 int rc = -ENODEV;
74
75 get_device(dev);
76 if (dev->driver && drv->probe) {
77 rc = drv->probe(sock);
78 if (!rc)
79 return 0;
80 }
81 put_device(dev);
82 return rc;
83}
84
85static void tifm_dummy_event(struct tifm_dev *sock)
86{
87 return;
88}
89
90static void tifm_device_remove(struct device *dev)
91{
92 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
93 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
94 driver);
95
96 if (dev->driver && drv->remove) {
97 sock->card_event = tifm_dummy_event;
98 sock->data_event = tifm_dummy_event;
99 drv->remove(sock);
100 sock->dev.driver = NULL;
101 }
102
103 put_device(dev);
104}
105
106#ifdef CONFIG_PM
107
108static int tifm_device_suspend(struct device *dev, pm_message_t state)
109{
110 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
111 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
112 driver);
113
114 if (dev->driver && drv->suspend)
115 return drv->suspend(sock, state);
116 return 0;
117}
118
119static int tifm_device_resume(struct device *dev)
120{
121 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
122 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
123 driver);
124
125 if (dev->driver && drv->resume)
126 return drv->resume(sock);
127 return 0;
128}
129
130#else
131
132#define tifm_device_suspend NULL
133#define tifm_device_resume NULL
134
135#endif /* CONFIG_PM */
136
137static ssize_t type_show(struct device *dev, struct device_attribute *attr,
138 char *buf)
139{
140 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
141 return sprintf(buf, "%x", sock->type);
142}
143static DEVICE_ATTR_RO(type);
144
145static struct attribute *tifm_dev_attrs[] = {
146 &dev_attr_type.attr,
147 NULL,
148};
149ATTRIBUTE_GROUPS(tifm_dev);
150
151static struct bus_type tifm_bus_type = {
152 .name = "tifm",
153 .dev_groups = tifm_dev_groups,
154 .match = tifm_bus_match,
155 .uevent = tifm_uevent,
156 .probe = tifm_device_probe,
157 .remove = tifm_device_remove,
158 .suspend = tifm_device_suspend,
159 .resume = tifm_device_resume
160};
161
162static void tifm_free(struct device *dev)
163{
164 struct tifm_adapter *fm = container_of(dev, struct tifm_adapter, dev);
165
166 kfree(fm);
167}
168
169static struct class tifm_adapter_class = {
170 .name = "tifm_adapter",
171 .dev_release = tifm_free
172};
173
174struct tifm_adapter *tifm_alloc_adapter(unsigned int num_sockets,
175 struct device *dev)
176{
177 struct tifm_adapter *fm;
178
179 fm = kzalloc(struct_size(fm, sockets, num_sockets), GFP_KERNEL);
180 if (fm) {
181 fm->dev.class = &tifm_adapter_class;
182 fm->dev.parent = dev;
183 device_initialize(&fm->dev);
184 spin_lock_init(&fm->lock);
185 fm->num_sockets = num_sockets;
186 }
187 return fm;
188}
189EXPORT_SYMBOL(tifm_alloc_adapter);
190
191int tifm_add_adapter(struct tifm_adapter *fm)
192{
193 int rc;
194
195 idr_preload(GFP_KERNEL);
196 spin_lock(&tifm_adapter_lock);
197 rc = idr_alloc(&tifm_adapter_idr, fm, 0, 0, GFP_NOWAIT);
198 if (rc >= 0)
199 fm->id = rc;
200 spin_unlock(&tifm_adapter_lock);
201 idr_preload_end();
202 if (rc < 0)
203 return rc;
204
205 dev_set_name(&fm->dev, "tifm%u", fm->id);
206 rc = device_add(&fm->dev);
207 if (rc) {
208 spin_lock(&tifm_adapter_lock);
209 idr_remove(&tifm_adapter_idr, fm->id);
210 spin_unlock(&tifm_adapter_lock);
211 }
212
213 return rc;
214}
215EXPORT_SYMBOL(tifm_add_adapter);
216
217void tifm_remove_adapter(struct tifm_adapter *fm)
218{
219 unsigned int cnt;
220
221 flush_workqueue(workqueue);
222 for (cnt = 0; cnt < fm->num_sockets; ++cnt) {
223 if (fm->sockets[cnt])
224 device_unregister(&fm->sockets[cnt]->dev);
225 }
226
227 spin_lock(&tifm_adapter_lock);
228 idr_remove(&tifm_adapter_idr, fm->id);
229 spin_unlock(&tifm_adapter_lock);
230 device_del(&fm->dev);
231}
232EXPORT_SYMBOL(tifm_remove_adapter);
233
234void tifm_free_adapter(struct tifm_adapter *fm)
235{
236 put_device(&fm->dev);
237}
238EXPORT_SYMBOL(tifm_free_adapter);
239
240void tifm_free_device(struct device *dev)
241{
242 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
243 kfree(sock);
244}
245EXPORT_SYMBOL(tifm_free_device);
246
247struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id,
248 unsigned char type)
249{
250 struct tifm_dev *sock = NULL;
251
252 if (!tifm_media_type_name(type, 0))
253 return sock;
254
255 sock = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
256 if (sock) {
257 spin_lock_init(&sock->lock);
258 sock->type = type;
259 sock->socket_id = id;
260 sock->card_event = tifm_dummy_event;
261 sock->data_event = tifm_dummy_event;
262
263 sock->dev.parent = fm->dev.parent;
264 sock->dev.bus = &tifm_bus_type;
265 sock->dev.dma_mask = fm->dev.parent->dma_mask;
266 sock->dev.release = tifm_free_device;
267
268 dev_set_name(&sock->dev, "tifm_%s%u:%u",
269 tifm_media_type_name(type, 2), fm->id, id);
270 printk(KERN_INFO DRIVER_NAME
271 ": %s card detected in socket %u:%u\n",
272 tifm_media_type_name(type, 0), fm->id, id);
273 }
274 return sock;
275}
276EXPORT_SYMBOL(tifm_alloc_device);
277
278void tifm_eject(struct tifm_dev *sock)
279{
280 struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
281 fm->eject(fm, sock);
282}
283EXPORT_SYMBOL(tifm_eject);
284
285int tifm_has_ms_pif(struct tifm_dev *sock)
286{
287 struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
288 return fm->has_ms_pif(fm, sock);
289}
290EXPORT_SYMBOL(tifm_has_ms_pif);
291
292int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
293 int direction)
294{
295 return dma_map_sg(&to_pci_dev(sock->dev.parent)->dev, sg, nents,
296 direction);
297}
298EXPORT_SYMBOL(tifm_map_sg);
299
300void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
301 int direction)
302{
303 dma_unmap_sg(&to_pci_dev(sock->dev.parent)->dev, sg, nents, direction);
304}
305EXPORT_SYMBOL(tifm_unmap_sg);
306
307void tifm_queue_work(struct work_struct *work)
308{
309 queue_work(workqueue, work);
310}
311EXPORT_SYMBOL(tifm_queue_work);
312
313int tifm_register_driver(struct tifm_driver *drv)
314{
315 drv->driver.bus = &tifm_bus_type;
316
317 return driver_register(&drv->driver);
318}
319EXPORT_SYMBOL(tifm_register_driver);
320
321void tifm_unregister_driver(struct tifm_driver *drv)
322{
323 driver_unregister(&drv->driver);
324}
325EXPORT_SYMBOL(tifm_unregister_driver);
326
327static int __init tifm_init(void)
328{
329 int rc;
330
331 workqueue = create_freezable_workqueue("tifm");
332 if (!workqueue)
333 return -ENOMEM;
334
335 rc = bus_register(&tifm_bus_type);
336
337 if (rc)
338 goto err_out_wq;
339
340 rc = class_register(&tifm_adapter_class);
341 if (!rc)
342 return 0;
343
344 bus_unregister(&tifm_bus_type);
345
346err_out_wq:
347 destroy_workqueue(workqueue);
348
349 return rc;
350}
351
352static void __exit tifm_exit(void)
353{
354 class_unregister(&tifm_adapter_class);
355 bus_unregister(&tifm_bus_type);
356 destroy_workqueue(workqueue);
357}
358
359subsys_initcall(tifm_init);
360module_exit(tifm_exit);
361
362MODULE_LICENSE("GPL");
363MODULE_AUTHOR("Alex Dubov");
364MODULE_DESCRIPTION("TI FlashMedia core driver");
365MODULE_LICENSE("GPL");
366MODULE_VERSION(DRIVER_VERSION);
1/*
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>
13#include <linux/slab.h>
14#include <linux/init.h>
15#include <linux/idr.h>
16
17#define DRIVER_NAME "tifm_core"
18#define DRIVER_VERSION "0.8"
19
20static struct workqueue_struct *workqueue;
21static DEFINE_IDR(tifm_adapter_idr);
22static DEFINE_SPINLOCK(tifm_adapter_lock);
23
24static const char *tifm_media_type_name(unsigned char type, unsigned char nt)
25{
26 const char *card_type_name[3][3] = {
27 { "SmartMedia/xD", "MemoryStick", "MMC/SD" },
28 { "XD", "MS", "SD"},
29 { "xd", "ms", "sd"}
30 };
31
32 if (nt > 2 || type < 1 || type > 3)
33 return NULL;
34 return card_type_name[nt][type - 1];
35}
36
37static int tifm_dev_match(struct tifm_dev *sock, struct tifm_device_id *id)
38{
39 if (sock->type == id->type)
40 return 1;
41 return 0;
42}
43
44static int tifm_bus_match(struct device *dev, struct device_driver *drv)
45{
46 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
47 struct tifm_driver *fm_drv = container_of(drv, struct tifm_driver,
48 driver);
49 struct tifm_device_id *ids = fm_drv->id_table;
50
51 if (ids) {
52 while (ids->type) {
53 if (tifm_dev_match(sock, ids))
54 return 1;
55 ++ids;
56 }
57 }
58 return 0;
59}
60
61static int tifm_uevent(struct device *dev, struct kobj_uevent_env *env)
62{
63 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
64
65 if (add_uevent_var(env, "TIFM_CARD_TYPE=%s", tifm_media_type_name(sock->type, 1)))
66 return -ENOMEM;
67
68 return 0;
69}
70
71static int tifm_device_probe(struct device *dev)
72{
73 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
74 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
75 driver);
76 int rc = -ENODEV;
77
78 get_device(dev);
79 if (dev->driver && drv->probe) {
80 rc = drv->probe(sock);
81 if (!rc)
82 return 0;
83 }
84 put_device(dev);
85 return rc;
86}
87
88static void tifm_dummy_event(struct tifm_dev *sock)
89{
90 return;
91}
92
93static int tifm_device_remove(struct device *dev)
94{
95 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
96 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
97 driver);
98
99 if (dev->driver && drv->remove) {
100 sock->card_event = tifm_dummy_event;
101 sock->data_event = tifm_dummy_event;
102 drv->remove(sock);
103 sock->dev.driver = NULL;
104 }
105
106 put_device(dev);
107 return 0;
108}
109
110#ifdef CONFIG_PM
111
112static int tifm_device_suspend(struct device *dev, pm_message_t state)
113{
114 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
115 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
116 driver);
117
118 if (dev->driver && drv->suspend)
119 return drv->suspend(sock, state);
120 return 0;
121}
122
123static int tifm_device_resume(struct device *dev)
124{
125 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
126 struct tifm_driver *drv = container_of(dev->driver, struct tifm_driver,
127 driver);
128
129 if (dev->driver && drv->resume)
130 return drv->resume(sock);
131 return 0;
132}
133
134#else
135
136#define tifm_device_suspend NULL
137#define tifm_device_resume NULL
138
139#endif /* CONFIG_PM */
140
141static ssize_t type_show(struct device *dev, struct device_attribute *attr,
142 char *buf)
143{
144 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
145 return sprintf(buf, "%x", sock->type);
146}
147
148static struct device_attribute tifm_dev_attrs[] = {
149 __ATTR(type, S_IRUGO, type_show, NULL),
150 __ATTR_NULL
151};
152
153static struct bus_type tifm_bus_type = {
154 .name = "tifm",
155 .dev_attrs = tifm_dev_attrs,
156 .match = tifm_bus_match,
157 .uevent = tifm_uevent,
158 .probe = tifm_device_probe,
159 .remove = tifm_device_remove,
160 .suspend = tifm_device_suspend,
161 .resume = tifm_device_resume
162};
163
164static void tifm_free(struct device *dev)
165{
166 struct tifm_adapter *fm = container_of(dev, struct tifm_adapter, dev);
167
168 kfree(fm);
169}
170
171static struct class tifm_adapter_class = {
172 .name = "tifm_adapter",
173 .dev_release = tifm_free
174};
175
176struct tifm_adapter *tifm_alloc_adapter(unsigned int num_sockets,
177 struct device *dev)
178{
179 struct tifm_adapter *fm;
180
181 fm = kzalloc(sizeof(struct tifm_adapter)
182 + sizeof(struct tifm_dev*) * num_sockets, GFP_KERNEL);
183 if (fm) {
184 fm->dev.class = &tifm_adapter_class;
185 fm->dev.parent = dev;
186 device_initialize(&fm->dev);
187 spin_lock_init(&fm->lock);
188 fm->num_sockets = num_sockets;
189 }
190 return fm;
191}
192EXPORT_SYMBOL(tifm_alloc_adapter);
193
194int tifm_add_adapter(struct tifm_adapter *fm)
195{
196 int rc;
197
198 if (!idr_pre_get(&tifm_adapter_idr, GFP_KERNEL))
199 return -ENOMEM;
200
201 spin_lock(&tifm_adapter_lock);
202 rc = idr_get_new(&tifm_adapter_idr, fm, &fm->id);
203 spin_unlock(&tifm_adapter_lock);
204 if (rc)
205 return rc;
206
207 dev_set_name(&fm->dev, "tifm%u", fm->id);
208 rc = device_add(&fm->dev);
209 if (rc) {
210 spin_lock(&tifm_adapter_lock);
211 idr_remove(&tifm_adapter_idr, fm->id);
212 spin_unlock(&tifm_adapter_lock);
213 }
214
215 return rc;
216}
217EXPORT_SYMBOL(tifm_add_adapter);
218
219void tifm_remove_adapter(struct tifm_adapter *fm)
220{
221 unsigned int cnt;
222
223 flush_workqueue(workqueue);
224 for (cnt = 0; cnt < fm->num_sockets; ++cnt) {
225 if (fm->sockets[cnt])
226 device_unregister(&fm->sockets[cnt]->dev);
227 }
228
229 spin_lock(&tifm_adapter_lock);
230 idr_remove(&tifm_adapter_idr, fm->id);
231 spin_unlock(&tifm_adapter_lock);
232 device_del(&fm->dev);
233}
234EXPORT_SYMBOL(tifm_remove_adapter);
235
236void tifm_free_adapter(struct tifm_adapter *fm)
237{
238 put_device(&fm->dev);
239}
240EXPORT_SYMBOL(tifm_free_adapter);
241
242void tifm_free_device(struct device *dev)
243{
244 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
245 kfree(sock);
246}
247EXPORT_SYMBOL(tifm_free_device);
248
249struct tifm_dev *tifm_alloc_device(struct tifm_adapter *fm, unsigned int id,
250 unsigned char type)
251{
252 struct tifm_dev *sock = NULL;
253
254 if (!tifm_media_type_name(type, 0))
255 return sock;
256
257 sock = kzalloc(sizeof(struct tifm_dev), GFP_KERNEL);
258 if (sock) {
259 spin_lock_init(&sock->lock);
260 sock->type = type;
261 sock->socket_id = id;
262 sock->card_event = tifm_dummy_event;
263 sock->data_event = tifm_dummy_event;
264
265 sock->dev.parent = fm->dev.parent;
266 sock->dev.bus = &tifm_bus_type;
267 sock->dev.dma_mask = fm->dev.parent->dma_mask;
268 sock->dev.release = tifm_free_device;
269
270 dev_set_name(&sock->dev, "tifm_%s%u:%u",
271 tifm_media_type_name(type, 2), fm->id, id);
272 printk(KERN_INFO DRIVER_NAME
273 ": %s card detected in socket %u:%u\n",
274 tifm_media_type_name(type, 0), fm->id, id);
275 }
276 return sock;
277}
278EXPORT_SYMBOL(tifm_alloc_device);
279
280void tifm_eject(struct tifm_dev *sock)
281{
282 struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
283 fm->eject(fm, sock);
284}
285EXPORT_SYMBOL(tifm_eject);
286
287int tifm_has_ms_pif(struct tifm_dev *sock)
288{
289 struct tifm_adapter *fm = dev_get_drvdata(sock->dev.parent);
290 return fm->has_ms_pif(fm, sock);
291}
292EXPORT_SYMBOL(tifm_has_ms_pif);
293
294int tifm_map_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
295 int direction)
296{
297 return pci_map_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
298}
299EXPORT_SYMBOL(tifm_map_sg);
300
301void tifm_unmap_sg(struct tifm_dev *sock, struct scatterlist *sg, int nents,
302 int direction)
303{
304 pci_unmap_sg(to_pci_dev(sock->dev.parent), sg, nents, direction);
305}
306EXPORT_SYMBOL(tifm_unmap_sg);
307
308void tifm_queue_work(struct work_struct *work)
309{
310 queue_work(workqueue, work);
311}
312EXPORT_SYMBOL(tifm_queue_work);
313
314int tifm_register_driver(struct tifm_driver *drv)
315{
316 drv->driver.bus = &tifm_bus_type;
317
318 return driver_register(&drv->driver);
319}
320EXPORT_SYMBOL(tifm_register_driver);
321
322void tifm_unregister_driver(struct tifm_driver *drv)
323{
324 driver_unregister(&drv->driver);
325}
326EXPORT_SYMBOL(tifm_unregister_driver);
327
328static int __init tifm_init(void)
329{
330 int rc;
331
332 workqueue = create_freezable_workqueue("tifm");
333 if (!workqueue)
334 return -ENOMEM;
335
336 rc = bus_register(&tifm_bus_type);
337
338 if (rc)
339 goto err_out_wq;
340
341 rc = class_register(&tifm_adapter_class);
342 if (!rc)
343 return 0;
344
345 bus_unregister(&tifm_bus_type);
346
347err_out_wq:
348 destroy_workqueue(workqueue);
349
350 return rc;
351}
352
353static void __exit tifm_exit(void)
354{
355 class_unregister(&tifm_adapter_class);
356 bus_unregister(&tifm_bus_type);
357 destroy_workqueue(workqueue);
358}
359
360subsys_initcall(tifm_init);
361module_exit(tifm_exit);
362
363MODULE_LICENSE("GPL");
364MODULE_AUTHOR("Alex Dubov");
365MODULE_DESCRIPTION("TI FlashMedia core driver");
366MODULE_LICENSE("GPL");
367MODULE_VERSION(DRIVER_VERSION);