[deliverable/linux.git] / sound / isa / sb / emu8000_patch.c

/*
 *  Patch routines for the emu8000 (AWE32/64)
 *
 *  Copyright (C) 1999 Steve Ratcliffe
 *  Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.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 "emu8000_local.h"
#include <asm/uaccess.h>
#include <linux/moduleparam.h>

static int emu8000_reset_addr = 0;
module_param(emu8000_reset_addr, int, 0444);
MODULE_PARM_DESC(emu8000_reset_addr, "reset write address at each time (makes slowdown)");


/*
 * Open up channels.
 */
static int
snd_emu8000_open_dma(emu8000_t *emu, int write)
{
	int i;

	/* reserve all 30 voices for loading */
	for (i = 0; i < EMU8000_DRAM_VOICES; i++) {
		snd_emux_lock_voice(emu->emu, i);
		snd_emu8000_dma_chan(emu, i, write);
	}

	/* assign voice 31 and 32 to ROM */
	EMU8000_VTFT_WRITE(emu, 30, 0);
	EMU8000_PSST_WRITE(emu, 30, 0x1d8);
	EMU8000_CSL_WRITE(emu, 30, 0x1e0);
	EMU8000_CCCA_WRITE(emu, 30, 0x1d8);
	EMU8000_VTFT_WRITE(emu, 31, 0);
	EMU8000_PSST_WRITE(emu, 31, 0x1d8);
	EMU8000_CSL_WRITE(emu, 31, 0x1e0);
	EMU8000_CCCA_WRITE(emu, 31, 0x1d8);

	return 0;
}

/*
 * Close all dram channels.
 */
static void
snd_emu8000_close_dma(emu8000_t *emu)
{
	int i;

	for (i = 0; i < EMU8000_DRAM_VOICES; i++) {
		snd_emu8000_dma_chan(emu, i, EMU8000_RAM_CLOSE);
		snd_emux_unlock_voice(emu->emu, i);
	}
}

/*
 */

#define BLANK_LOOP_START	4
#define BLANK_LOOP_END		8
#define BLANK_LOOP_SIZE		12
#define BLANK_HEAD_SIZE		48

/*
 * Read a word from userland, taking care of conversions from
 * 8bit samples etc.
 */
static unsigned short
read_word(const void __user *buf, int offset, int mode)
{
	unsigned short c;
	if (mode & SNDRV_SFNT_SAMPLE_8BITS) {
		unsigned char cc;
		get_user(cc, (unsigned char __user *)buf + offset);
		c = cc << 8; /* convert 8bit -> 16bit */
	} else {
#ifdef SNDRV_LITTLE_ENDIAN
		get_user(c, (unsigned short __user *)buf + offset);
#else
		unsigned short cc;
		get_user(cc, (unsigned short __user *)buf + offset);
		c = swab16(cc);
#endif
	}
	if (mode & SNDRV_SFNT_SAMPLE_UNSIGNED)
		c ^= 0x8000; /* unsigned -> signed */
	return c;
}

/*
 */
static void
snd_emu8000_write_wait(emu8000_t *emu)
{
	while ((EMU8000_SMALW_READ(emu) & 0x80000000) != 0) {
		schedule_timeout_interruptible(1);
		if (signal_pending(current))
			break;
	}
}

/*
 * write sample word data
 *
 * You should not have to keep resetting the address each time
 * as the chip is supposed to step on the next address automatically.
 * It mostly does, but during writes of some samples at random it
 * completely loses words (every one in 16 roughly but with no
 * obvious pattern).
 *
 * This is therefore much slower than need be, but is at least
 * working.
 */
static inline void
write_word(emu8000_t *emu, int *offset, unsigned short data)
{
	if (emu8000_reset_addr) {
		if (emu8000_reset_addr > 1)
			snd_emu8000_write_wait(emu);
		EMU8000_SMALW_WRITE(emu, *offset);
	}
	EMU8000_SMLD_WRITE(emu, data);
	*offset += 1;
}

/*
 * Write the sample to EMU800 memory.  This routine is invoked out of
 * the generic soundfont routines as a callback.
 */
int
snd_emu8000_sample_new(snd_emux_t *rec, snd_sf_sample_t *sp,
		       snd_util_memhdr_t *hdr, const void __user *data, long count)
{
	int  i;
	int  rc;
	int  offset;
	int  truesize;
	int  dram_offset, dram_start;
	emu8000_t *emu;

	emu = rec->hw;
	snd_assert(sp != NULL, return -EINVAL);

	if (sp->v.size == 0)
		return 0;

	/* be sure loop points start < end */
	if (sp->v.loopstart > sp->v.loopend) {
		int tmp = sp->v.loopstart;
		sp->v.loopstart = sp->v.loopend;
		sp->v.loopend = tmp;
	}

	/* compute true data size to be loaded */
	truesize = sp->v.size;
	if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP))
		truesize += sp->v.loopend - sp->v.loopstart;
	if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK)
		truesize += BLANK_LOOP_SIZE;

	sp->block = snd_util_mem_alloc(hdr, truesize * 2);
	if (sp->block == NULL) {
		/*snd_printd("EMU8000: out of memory\n");*/
		/* not ENOMEM (for compatibility) */
		return -ENOSPC;
	}

	if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS) {
		if (!access_ok(VERIFY_READ, data, sp->v.size))
			return -EFAULT;
	} else {
		if (!access_ok(VERIFY_READ, data, sp->v.size * 2))
			return -EFAULT;
	}

	/* recalculate address offset */
	sp->v.end -= sp->v.start;
	sp->v.loopstart -= sp->v.start;
	sp->v.loopend -= sp->v.start;
	sp->v.start = 0;

	/* dram position (in word) -- mem_offset is byte */
	dram_offset = EMU8000_DRAM_OFFSET + (sp->block->offset >> 1);
	dram_start = dram_offset;

	/* set the total size (store onto obsolete checksum value) */
	sp->v.truesize = truesize * 2; /* in bytes */

	snd_emux_terminate_all(emu->emu);
	if ((rc = snd_emu8000_open_dma(emu, EMU8000_RAM_WRITE)) != 0)
		return rc;

	/* Set the address to start writing at */
	snd_emu8000_write_wait(emu);
	EMU8000_SMALW_WRITE(emu, dram_offset);

	/*snd_emu8000_init_fm(emu);*/

#if 0
	/* first block - write 48 samples for silence */
	if (! sp->block->offset) {
		for (i = 0; i < BLANK_HEAD_SIZE; i++) {
			write_word(emu, &dram_offset, 0);
		}
	}
#endif

	offset = 0;
	for (i = 0; i < sp->v.size; i++) {
		unsigned short s;

		s = read_word(data, offset, sp->v.mode_flags);
		offset++;
		write_word(emu, &dram_offset, s);

		/* we may take too long time in this loop.
		 * so give controls back to kernel if needed.
		 */
		cond_resched();

		if (i == sp->v.loopend &&
		    (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP)))
		{
			int looplen = sp->v.loopend - sp->v.loopstart;
			int k;

			/* copy reverse loop */
			for (k = 1; k <= looplen; k++) {
				s = read_word(data, offset - k, sp->v.mode_flags);
				write_word(emu, &dram_offset, s);
			}
			if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_BIDIR_LOOP) {
				sp->v.loopend += looplen;
			} else {
				sp->v.loopstart += looplen;
				sp->v.loopend += looplen;
			}
			sp->v.end += looplen;
		}
	}

	/* if no blank loop is attached in the sample, add it */
	if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) {
		for (i = 0; i < BLANK_LOOP_SIZE; i++) {
			write_word(emu, &dram_offset, 0);
		}
		if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT) {
			sp->v.loopstart = sp->v.end + BLANK_LOOP_START;
			sp->v.loopend = sp->v.end + BLANK_LOOP_END;
		}
	}

	/* add dram offset */
	sp->v.start += dram_start;
	sp->v.end += dram_start;
	sp->v.loopstart += dram_start;
	sp->v.loopend += dram_start;

	snd_emu8000_close_dma(emu);
	snd_emu8000_init_fm(emu);

	return 0;
}

/*
 * free a sample block
 */
int
snd_emu8000_sample_free(snd_emux_t *rec, snd_sf_sample_t *sp, snd_util_memhdr_t *hdr)
{
	if (sp->block) {
		snd_util_mem_free(hdr, sp->block);
		sp->block = NULL;
	}
	return 0;
}


/*
 * sample_reset callback - terminate voices
 */
void
snd_emu8000_sample_reset(snd_emux_t *rec)
{
	snd_emux_terminate_all(rec);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Patch routines for the emu8000 (AWE32/64)
	3	*
	4	* Copyright (C) 1999 Steve Ratcliffe
	5	* Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#include "emu8000_local.h"
	23	#include <asm/uaccess.h>
	24	#include <linux/moduleparam.h>
	25
	26	static int emu8000_reset_addr = 0;
	27	module_param(emu8000_reset_addr, int, 0444);
	28	MODULE_PARM_DESC(emu8000_reset_addr, "reset write address at each time (makes slowdown)");
	29
	30
	31	/*
	32	* Open up channels.
	33	*/
	34	static int
	35	snd_emu8000_open_dma(emu8000_t *emu, int write)
	36	{
	37	int i;
	38
	39	/* reserve all 30 voices for loading */
	40	for (i = 0; i < EMU8000_DRAM_VOICES; i++) {
	41	snd_emux_lock_voice(emu->emu, i);
	42	snd_emu8000_dma_chan(emu, i, write);
	43	}
	44
	45	/* assign voice 31 and 32 to ROM */
	46	EMU8000_VTFT_WRITE(emu, 30, 0);
	47	EMU8000_PSST_WRITE(emu, 30, 0x1d8);
	48	EMU8000_CSL_WRITE(emu, 30, 0x1e0);
	49	EMU8000_CCCA_WRITE(emu, 30, 0x1d8);
	50	EMU8000_VTFT_WRITE(emu, 31, 0);
	51	EMU8000_PSST_WRITE(emu, 31, 0x1d8);
	52	EMU8000_CSL_WRITE(emu, 31, 0x1e0);
	53	EMU8000_CCCA_WRITE(emu, 31, 0x1d8);
	54
	55	return 0;
	56	}
	57
	58	/*
	59	* Close all dram channels.
	60	*/
	61	static void
	62	snd_emu8000_close_dma(emu8000_t *emu)
	63	{
	64	int i;
65
66	for (i = 0; i < EMU8000_DRAM_VOICES; i++) {
67	snd_emu8000_dma_chan(emu, i, EMU8000_RAM_CLOSE);
68	snd_emux_unlock_voice(emu->emu, i);
69	}
70	}
71
72	/*
73	*/
74
75	#define BLANK_LOOP_START 4
76	#define BLANK_LOOP_END 8
77	#define BLANK_LOOP_SIZE 12
78	#define BLANK_HEAD_SIZE 48
79
80	/*
81	* Read a word from userland, taking care of conversions from
82	* 8bit samples etc.
83	*/
84	static unsigned short
85	read_word(const void __user *buf, int offset, int mode)
86	{
87	unsigned short c;
88	if (mode & SNDRV_SFNT_SAMPLE_8BITS) {
89	unsigned char cc;
90	get_user(cc, (unsigned char __user *)buf + offset);
91	c = cc << 8; /* convert 8bit -> 16bit */
92	} else {
93	#ifdef SNDRV_LITTLE_ENDIAN
94	get_user(c, (unsigned short __user *)buf + offset);
95	#else
96	unsigned short cc;
97	get_user(cc, (unsigned short __user *)buf + offset);
98	c = swab16(cc);
99	#endif
100	}
101	if (mode & SNDRV_SFNT_SAMPLE_UNSIGNED)
102	c ^= 0x8000; /* unsigned -> signed */
103	return c;
104	}
105
106	/*
107	*/
108	static void
109	snd_emu8000_write_wait(emu8000_t *emu)
110	{
111	while ((EMU8000_SMALW_READ(emu) & 0x80000000) != 0) {
8433a509	112	schedule_timeout_interruptible(1);
1da177e4 LT	113	if (signal_pending(current))
	114	break;
	115	}
	116	}
	117
	118	/*
	119	* write sample word data
	120	*
	121	* You should not have to keep resetting the address each time
	122	* as the chip is supposed to step on the next address automatically.
	123	* It mostly does, but during writes of some samples at random it
	124	* completely loses words (every one in 16 roughly but with no
	125	* obvious pattern).
	126	*
	127	* This is therefore much slower than need be, but is at least
	128	* working.
	129	*/
77933d72	130	static inline void
1da177e4 LT	131	write_word(emu8000_t emu, int offset, unsigned short data)
	132	{
	133	if (emu8000_reset_addr) {
	134	if (emu8000_reset_addr > 1)
	135	snd_emu8000_write_wait(emu);
	136	EMU8000_SMALW_WRITE(emu, *offset);
	137	}
	138	EMU8000_SMLD_WRITE(emu, data);
	139	*offset += 1;
	140	}
	141
	142	/*
	143	* Write the sample to EMU800 memory. This routine is invoked out of
	144	* the generic soundfont routines as a callback.
	145	*/
	146	int
	147	snd_emu8000_sample_new(snd_emux_t rec, snd_sf_sample_t sp,
	148	snd_util_memhdr_t hdr, const void __user data, long count)
	149	{
	150	int i;
	151	int rc;
	152	int offset;
	153	int truesize;
	154	int dram_offset, dram_start;
	155	emu8000_t *emu;
	156
	157	emu = rec->hw;
	158	snd_assert(sp != NULL, return -EINVAL);
	159
	160	if (sp->v.size == 0)
	161	return 0;
	162
	163	/* be sure loop points start < end */
	164	if (sp->v.loopstart > sp->v.loopend) {
	165	int tmp = sp->v.loopstart;
	166	sp->v.loopstart = sp->v.loopend;
	167	sp->v.loopend = tmp;
	168	}
	169
	170	/* compute true data size to be loaded */
	171	truesize = sp->v.size;
	172	if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP\|SNDRV_SFNT_SAMPLE_REVERSE_LOOP))
	173	truesize += sp->v.loopend - sp->v.loopstart;
	174	if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK)
	175	truesize += BLANK_LOOP_SIZE;
	176
	177	sp->block = snd_util_mem_alloc(hdr, truesize * 2);
	178	if (sp->block == NULL) {
	179	/snd_printd("EMU8000: out of memory\n");/
	180	/* not ENOMEM (for compatibility) */
	181	return -ENOSPC;
	182	}
	183
	184	if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS) {
	185	if (!access_ok(VERIFY_READ, data, sp->v.size))
	186	return -EFAULT;
	187	} else {
	188	if (!access_ok(VERIFY_READ, data, sp->v.size * 2))
	189	return -EFAULT;
	190	}
	191
	192	/* recalculate address offset */
	193	sp->v.end -= sp->v.start;
	194	sp->v.loopstart -= sp->v.start;
195	sp->v.loopend -= sp->v.start;
196	sp->v.start = 0;
197
198	/* dram position (in word) -- mem_offset is byte */
199	dram_offset = EMU8000_DRAM_OFFSET + (sp->block->offset >> 1);
200	dram_start = dram_offset;
201
202	/* set the total size (store onto obsolete checksum value) */
203	sp->v.truesize = truesize * 2; /* in bytes */
204
205	snd_emux_terminate_all(emu->emu);
206	if ((rc = snd_emu8000_open_dma(emu, EMU8000_RAM_WRITE)) != 0)
207	return rc;
208
209	/* Set the address to start writing at */
210	snd_emu8000_write_wait(emu);
211	EMU8000_SMALW_WRITE(emu, dram_offset);
212
213	/snd_emu8000_init_fm(emu);/
214
215	#if 0
216	/* first block - write 48 samples for silence */
217	if (! sp->block->offset) {
218	for (i = 0; i < BLANK_HEAD_SIZE; i++) {
219	write_word(emu, &dram_offset, 0);
220	}
221	}
222	#endif
223
224	offset = 0;
225	for (i = 0; i < sp->v.size; i++) {
226	unsigned short s;
227
228	s = read_word(data, offset, sp->v.mode_flags);
229	offset++;
230	write_word(emu, &dram_offset, s);
231
232	/* we may take too long time in this loop.
233	* so give controls back to kernel if needed.
234	*/
235	cond_resched();
236
237	if (i == sp->v.loopend &&
238	(sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP\|SNDRV_SFNT_SAMPLE_REVERSE_LOOP)))
239	{
240	int looplen = sp->v.loopend - sp->v.loopstart;
241	int k;
242
243	/* copy reverse loop */
244	for (k = 1; k <= looplen; k++) {
245	s = read_word(data, offset - k, sp->v.mode_flags);
246	write_word(emu, &dram_offset, s);
247	}
248	if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_BIDIR_LOOP) {
249	sp->v.loopend += looplen;
250	} else {
251	sp->v.loopstart += looplen;
252	sp->v.loopend += looplen;
253	}
254	sp->v.end += looplen;
255	}
256	}
257
258	/* if no blank loop is attached in the sample, add it */
259	if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) {
260	for (i = 0; i < BLANK_LOOP_SIZE; i++) {
261	write_word(emu, &dram_offset, 0);
262	}
263	if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT) {
264	sp->v.loopstart = sp->v.end + BLANK_LOOP_START;
265	sp->v.loopend = sp->v.end + BLANK_LOOP_END;
266	}
267	}
268
269	/* add dram offset */
270	sp->v.start += dram_start;
271	sp->v.end += dram_start;
272	sp->v.loopstart += dram_start;
273	sp->v.loopend += dram_start;
274
275	snd_emu8000_close_dma(emu);
276	snd_emu8000_init_fm(emu);
277
278	return 0;
279	}
280
281	/*
282	* free a sample block
283	*/
284	int
285	snd_emu8000_sample_free(snd_emux_t rec, snd_sf_sample_t sp, snd_util_memhdr_t *hdr)
286	{
287	if (sp->block) {
288	snd_util_mem_free(hdr, sp->block);
289	sp->block = NULL;
290	}
291	return 0;
292	}
293
294
295	/*
296	* sample_reset callback - terminate voices
297	*/
298	void
299	snd_emu8000_sample_reset(snd_emux_t *rec)
300	{
301	snd_emux_terminate_all(rec);
302	}