[linux-block.git] / sound / drivers / opl4 / opl4_proc.c

/*
 * Functions for the OPL4 proc file
 * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include "opl4_local.h"
#include <linux/vmalloc.h>
#include <sound/info.h>

#ifdef CONFIG_PROC_FS

static int snd_opl4_mem_proc_open(struct snd_info_entry *entry,
				  unsigned short mode, void **file_private_data)
{
	struct snd_opl4 *opl4 = entry->private_data;

	mutex_lock(&opl4->access_mutex);
	if (opl4->memory_access) {
		mutex_unlock(&opl4->access_mutex);
		return -EBUSY;
	}
	opl4->memory_access++;
	mutex_unlock(&opl4->access_mutex);
	return 0;
}

static int snd_opl4_mem_proc_release(struct snd_info_entry *entry,
				     unsigned short mode, void *file_private_data)
{
	struct snd_opl4 *opl4 = entry->private_data;

	mutex_lock(&opl4->access_mutex);
	opl4->memory_access--;
	mutex_unlock(&opl4->access_mutex);
	return 0;
}

static ssize_t snd_opl4_mem_proc_read(struct snd_info_entry *entry,
				      void *file_private_data,
				      struct file *file, char __user *_buf,
				      size_t count, loff_t pos)
{
	struct snd_opl4 *opl4 = entry->private_data;
	long size;
	char* buf;

	size = count;
	if (pos + size > entry->size)
		size = entry->size - pos;
	if (size > 0) {
		buf = vmalloc(size);
		if (!buf)
			return -ENOMEM;
		snd_opl4_read_memory(opl4, buf, pos, size);
		if (copy_to_user(_buf, buf, size)) {
			vfree(buf);
			return -EFAULT;
		}
		vfree(buf);
		return size;
	}
	return 0;
}

static ssize_t snd_opl4_mem_proc_write(struct snd_info_entry *entry,
				       void *file_private_data,
				       struct file *file,
				       const char __user *_buf,
				       size_t count, size_t pos)
{
	struct snd_opl4 *opl4 = entry->private_data;
	long size;
	char *buf;

	size = count;
	if (pos + size > entry->size)
		size = entry->size - pos;
	if (size > 0) {
		buf = vmalloc(size);
		if (!buf)
			return -ENOMEM;
		if (copy_from_user(buf, _buf, size)) {
			vfree(buf);
			return -EFAULT;
		}
		snd_opl4_write_memory(opl4, buf, pos, size);
		vfree(buf);
		return size;
	}
	return 0;
}

static loff_t snd_opl4_mem_proc_llseek(struct snd_info_entry *entry,
				       void *file_private_data,
				       struct file *file,
				       loff_t offset, int orig)
{
	switch (orig) {
	case SEEK_SET:
		file->f_pos = offset;
		break;
	case SEEK_CUR:
		file->f_pos += offset;
		break;
	case SEEK_END: /* offset is negative */
		file->f_pos = entry->size + offset;
		break;
	default:
		return -EINVAL;
	}
	if (file->f_pos > entry->size)
		file->f_pos = entry->size;
	return file->f_pos;
}

static struct snd_info_entry_ops snd_opl4_mem_proc_ops = {
	.open = snd_opl4_mem_proc_open,
	.release = snd_opl4_mem_proc_release,
	.read = snd_opl4_mem_proc_read,
	.write = snd_opl4_mem_proc_write,
	.llseek = snd_opl4_mem_proc_llseek,
};

int snd_opl4_create_proc(struct snd_opl4 *opl4)
{
	struct snd_info_entry *entry;

	entry = snd_info_create_card_entry(opl4->card, "opl4-mem", opl4->card->proc_root);
	if (entry) {
		if (opl4->hardware < OPL3_HW_OPL4_ML) {
			/* OPL4 can access 4 MB external ROM/SRAM */
			entry->mode |= S_IWUSR;
			entry->size = 4 * 1024 * 1024;
		} else {
			/* OPL4-ML has 1 MB internal ROM */
			entry->size = 1 * 1024 * 1024;
		}
		entry->content = SNDRV_INFO_CONTENT_DATA;
		entry->c.ops = &snd_opl4_mem_proc_ops;
		entry->module = THIS_MODULE;
		entry->private_data = opl4;
		if (snd_info_register(entry) < 0) {
			snd_info_free_entry(entry);
			entry = NULL;
		}
	}
	opl4->proc_entry = entry;
	return 0;
}

void snd_opl4_free_proc(struct snd_opl4 *opl4)
{
	snd_info_free_entry(opl4->proc_entry);
}

#endif /* CONFIG_PROC_FS */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Functions for the OPL4 proc file
	3	* Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*/
	19
	20	#include "opl4_local.h"
	21	#include <linux/vmalloc.h>
	22	#include <sound/info.h>
	23
	24	#ifdef CONFIG_PROC_FS
	25
a42dd420	26	static int snd_opl4_mem_proc_open(struct snd_info_entry *entry,
1da177e4 LT	27	unsigned short mode, void **file_private_data)
1da177e4 LT	28	{
a42dd420	29	struct snd_opl4 *opl4 = entry->private_data;
1da177e4	30
ef9f0a42	31	mutex_lock(&opl4->access_mutex);
1da177e4	32	if (opl4->memory_access) {
ef9f0a42	33	mutex_unlock(&opl4->access_mutex);
1da177e4 LT	34	return -EBUSY;
	35	}
	36	opl4->memory_access++;
ef9f0a42	37	mutex_unlock(&opl4->access_mutex);
1da177e4 LT	38	return 0;
	39	}
	40
a42dd420	41	static int snd_opl4_mem_proc_release(struct snd_info_entry *entry,
1da177e4 LT	42	unsigned short mode, void *file_private_data)
1da177e4 LT	43	{
a42dd420	44	struct snd_opl4 *opl4 = entry->private_data;
1da177e4	45
ef9f0a42	46	mutex_lock(&opl4->access_mutex);
1da177e4	47	opl4->memory_access--;
ef9f0a42	48	mutex_unlock(&opl4->access_mutex);
1da177e4 LT	49	return 0;
	50	}
	51
24e4a121 TI	52	static ssize_t snd_opl4_mem_proc_read(struct snd_info_entry *entry,
	53	void *file_private_data,
	54	struct file file, char __user _buf,
	55	size_t count, loff_t pos)
1da177e4	56	{
a42dd420	57	struct snd_opl4 *opl4 = entry->private_data;
1da177e4 LT	58	long size;
	59	char* buf;
	60
	61	size = count;
	62	if (pos + size > entry->size)
	63	size = entry->size - pos;
	64	if (size > 0) {
	65	buf = vmalloc(size);
	66	if (!buf)
	67	return -ENOMEM;
	68	snd_opl4_read_memory(opl4, buf, pos, size);
	69	if (copy_to_user(_buf, buf, size)) {
	70	vfree(buf);
	71	return -EFAULT;
	72	}
	73	vfree(buf);
	74	return size;
	75	}
	76	return 0;
	77	}
	78
24e4a121 TI	79	static ssize_t snd_opl4_mem_proc_write(struct snd_info_entry *entry,
	80	void *file_private_data,
	81	struct file *file,
	82	const char __user *_buf,
	83	size_t count, size_t pos)
1da177e4	84	{
a42dd420	85	struct snd_opl4 *opl4 = entry->private_data;
1da177e4 LT	86	long size;
	87	char *buf;
	88
	89	size = count;
	90	if (pos + size > entry->size)
	91	size = entry->size - pos;
	92	if (size > 0) {
	93	buf = vmalloc(size);
	94	if (!buf)
	95	return -ENOMEM;
	96	if (copy_from_user(buf, _buf, size)) {
	97	vfree(buf);
	98	return -EFAULT;
	99	}
	100	snd_opl4_write_memory(opl4, buf, pos, size);
	101	vfree(buf);
	102	return size;
	103	}
	104	return 0;
	105	}
	106
24e4a121 TI	107	static loff_t snd_opl4_mem_proc_llseek(struct snd_info_entry *entry,
	108	void *file_private_data,
	109	struct file *file,
	110	loff_t offset, int orig)
1da177e4 LT	111	{
1da177e4 LT	112	switch (orig) {
dd47a338	113	case SEEK_SET:
1da177e4 LT	114	file->f_pos = offset;
1da177e4 LT	115	break;
dd47a338	116	case SEEK_CUR:
1da177e4 LT	117	file->f_pos += offset;
1da177e4 LT	118	break;
dd47a338	119	case SEEK_END: /* offset is negative */
1da177e4 LT	120	file->f_pos = entry->size + offset;
	121	break;
	122	default:
	123	return -EINVAL;
	124	}
	125	if (file->f_pos > entry->size)
	126	file->f_pos = entry->size;
	127	return file->f_pos;
	128	}
	129
	130	static struct snd_info_entry_ops snd_opl4_mem_proc_ops = {
	131	.open = snd_opl4_mem_proc_open,
	132	.release = snd_opl4_mem_proc_release,
	133	.read = snd_opl4_mem_proc_read,
	134	.write = snd_opl4_mem_proc_write,
	135	.llseek = snd_opl4_mem_proc_llseek,
	136	};
	137
a42dd420	138	int snd_opl4_create_proc(struct snd_opl4 *opl4)
1da177e4	139	{
a42dd420	140	struct snd_info_entry *entry;
1da177e4 LT	141
	142	entry = snd_info_create_card_entry(opl4->card, "opl4-mem", opl4->card->proc_root);
	143	if (entry) {
	144	if (opl4->hardware < OPL3_HW_OPL4_ML) {
	145	/* OPL4 can access 4 MB external ROM/SRAM */
	146	entry->mode \|= S_IWUSR;
	147	entry->size = 4 * 1024 * 1024;
	148	} else {
	149	/* OPL4-ML has 1 MB internal ROM */
	150	entry->size = 1 * 1024 * 1024;
	151	}
	152	entry->content = SNDRV_INFO_CONTENT_DATA;
	153	entry->c.ops = &snd_opl4_mem_proc_ops;
	154	entry->module = THIS_MODULE;
	155	entry->private_data = opl4;
	156	if (snd_info_register(entry) < 0) {
	157	snd_info_free_entry(entry);
	158	entry = NULL;
	159	}
	160	}
	161	opl4->proc_entry = entry;
	162	return 0;
	163	}
	164
a42dd420	165	void snd_opl4_free_proc(struct snd_opl4 *opl4)
1da177e4	166	{
746d4a02	167	snd_info_free_entry(opl4->proc_entry);
1da177e4 LT	168	}
	169
	170	#endif /* CONFIG_PROC_FS */