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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * tifm_core.c - TI FlashMedia driver
4 *
5 * Copyright (C) 2006 Alex Dubov <[email protected]>
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, const 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, const struct device_driver *drv)
42{
43 struct tifm_dev *sock = container_of(dev, struct tifm_dev, dev);
44 const struct tifm_driver *fm_drv = container_of_const(drv, struct tifm_driver,
45 driver);
46 const 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 const 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 const 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_flex(*fm, sockets, num_sockets);
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_obj(struct tifm_dev);
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);