[linux-block.git] / sound / isa / gus / gus_dram.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *  DRAM access routines
 */

#include <linux/time.h>
#include <sound/core.h>
#include <sound/gus.h>
#include <sound/info.h>


static int snd_gus_dram_poke(struct snd_gus_card *gus, char __user *_buffer,
			     unsigned int address, unsigned int size)
{
	unsigned long flags;
	unsigned int size1, size2;
	char buffer[256], *pbuffer;

	while (size > 0) {
		size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
		if (copy_from_user(buffer, _buffer, size1))
			return -EFAULT;
		if (gus->interwave) {
			spin_lock_irqsave(&gus->reg_lock, flags);
			snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
			snd_gf1_dram_addr(gus, address);
			outsb(GUSP(gus, DRAM), buffer, size1);
			spin_unlock_irqrestore(&gus->reg_lock, flags);
			address += size1;
		} else {
			pbuffer = buffer;
			size2 = size1;
			while (size2--)
				snd_gf1_poke(gus, address++, *pbuffer++);
		}
		size -= size1;
		_buffer += size1;
	}
	return 0;
}


int snd_gus_dram_write(struct snd_gus_card *gus, char __user *buffer,
		       unsigned int address, unsigned int size)
{
	return snd_gus_dram_poke(gus, buffer, address, size);
}

static int snd_gus_dram_peek(struct snd_gus_card *gus, char __user *_buffer,
			     unsigned int address, unsigned int size,
			     int rom)
{
	unsigned long flags;
	unsigned int size1, size2;
	char buffer[256], *pbuffer;

	while (size > 0) {
		size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
		if (gus->interwave) {
			spin_lock_irqsave(&gus->reg_lock, flags);
			snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, rom ? 0x03 : 0x01);
			snd_gf1_dram_addr(gus, address);
			insb(GUSP(gus, DRAM), buffer, size1);
			snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
			spin_unlock_irqrestore(&gus->reg_lock, flags);
			address += size1;
		} else {
			pbuffer = buffer;
			size2 = size1;
			while (size2--)
				*pbuffer++ = snd_gf1_peek(gus, address++);
		}
		if (copy_to_user(_buffer, buffer, size1))
			return -EFAULT;
		size -= size1;
		_buffer += size1;
	}
	return 0;
}

int snd_gus_dram_read(struct snd_gus_card *gus, char __user *buffer,
		      unsigned int address, unsigned int size,
		      int rom)
{
	return snd_gus_dram_peek(gus, buffer, address, size, rom);
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4	2	/*
c1017a4c	3	* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
1da177e4	4	* DRAM access routines
1da177e4 LT	5	*/
1da177e4 LT	6
1da177e4 LT	7	#include <linux/time.h>
	8	#include <sound/core.h>
	9	#include <sound/gus.h>
	10	#include <sound/info.h>
	11
	12
5e2da206	13	static int snd_gus_dram_poke(struct snd_gus_card gus, char __user _buffer,
1da177e4 LT	14	unsigned int address, unsigned int size)
	15	{
	16	unsigned long flags;
	17	unsigned int size1, size2;
	18	char buffer[256], *pbuffer;
	19
	20	while (size > 0) {
	21	size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
	22	if (copy_from_user(buffer, _buffer, size1))
	23	return -EFAULT;
	24	if (gus->interwave) {
	25	spin_lock_irqsave(&gus->reg_lock, flags);
	26	snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
	27	snd_gf1_dram_addr(gus, address);
	28	outsb(GUSP(gus, DRAM), buffer, size1);
	29	spin_unlock_irqrestore(&gus->reg_lock, flags);
	30	address += size1;
	31	} else {
	32	pbuffer = buffer;
	33	size2 = size1;
	34	while (size2--)
	35	snd_gf1_poke(gus, address++, *pbuffer++);
	36	}
	37	size -= size1;
	38	_buffer += size1;
	39	}
	40	return 0;
	41	}
	42
	43
5e2da206	44	int snd_gus_dram_write(struct snd_gus_card gus, char __user buffer,
1da177e4 LT	45	unsigned int address, unsigned int size)
	46	{
	47	return snd_gus_dram_poke(gus, buffer, address, size);
	48	}
	49
5e2da206	50	static int snd_gus_dram_peek(struct snd_gus_card gus, char __user _buffer,
1da177e4 LT	51	unsigned int address, unsigned int size,
	52	int rom)
	53	{
	54	unsigned long flags;
	55	unsigned int size1, size2;
	56	char buffer[256], *pbuffer;
	57
	58	while (size > 0) {
	59	size1 = size > sizeof(buffer) ? sizeof(buffer) : size;
	60	if (gus->interwave) {
	61	spin_lock_irqsave(&gus->reg_lock, flags);
	62	snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, rom ? 0x03 : 0x01);
	63	snd_gf1_dram_addr(gus, address);
	64	insb(GUSP(gus, DRAM), buffer, size1);
	65	snd_gf1_write8(gus, SNDRV_GF1_GB_MEMORY_CONTROL, 0x01);
	66	spin_unlock_irqrestore(&gus->reg_lock, flags);
	67	address += size1;
	68	} else {
	69	pbuffer = buffer;
	70	size2 = size1;
	71	while (size2--)
	72	*pbuffer++ = snd_gf1_peek(gus, address++);
	73	}
	74	if (copy_to_user(_buffer, buffer, size1))
	75	return -EFAULT;
	76	size -= size1;
	77	_buffer += size1;
	78	}
	79	return 0;
	80	}
	81
5e2da206	82	int snd_gus_dram_read(struct snd_gus_card gus, char __user buffer,
1da177e4 LT	83	unsigned int address, unsigned int size,
	84	int rom)
	85	{
	86	return snd_gus_dram_peek(gus, buffer, address, size, rom);
	87	}