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// 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(struct device *dev, struct kobj_uevent_env *env)
 59{
 60	struct tifm_dev *sock = container_of(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);