1 // SPDX-License-Identifier: GPL-2.0-or-later
6  *  Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
30 		snd_emux_lock_voice(emu->emu, i);  in snd_emu8000_open_dma()
57 		snd_emux_unlock_voice(emu->emu, i);  in snd_emu8000_close_dma()
65 #define BLANK_LOOP_END		8
71  * 8bit samples etc.
80 		c = cc << 8; /* convert 8bit -> 16bit */  in read_word()
91 		c ^= 0x8000; /* unsigned -> signed */  in read_word()
101 		schedule_timeout_interruptible(1);  in snd_emu8000_write_wait()
113  * completely loses words (every one in 16 roughly but with no
123 		if (emu8000_reset_addr > 1)  in write_word()
128 	*offset += 1;  in write_word()
147 	emu = rec->hw;  in snd_emu8000_sample_new()
149 		return -EINVAL;  in snd_emu8000_sample_new()
152 	truesize = sp->v.size;  in snd_emu8000_sample_new()
153 	if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP))  in snd_emu8000_sample_new()
154 		truesize += sp->v.loopend - sp->v.loopstart;  in snd_emu8000_sample_new()
155 	if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK)  in snd_emu8000_sample_new()
158 	sp->block = snd_util_mem_alloc(hdr, truesize * 2);  in snd_emu8000_sample_new()
159 	if (sp->block == NULL) {  in snd_emu8000_sample_new()
161 		return -ENOSPC;  in snd_emu8000_sample_new()
164 	if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS) {  in snd_emu8000_sample_new()
165 		if (!access_ok(data, sp->v.size))  in snd_emu8000_sample_new()
166 			return -EFAULT;  in snd_emu8000_sample_new()
168 		if (!access_ok(data, sp->v.size * 2))  in snd_emu8000_sample_new()
169 			return -EFAULT;  in snd_emu8000_sample_new()
172 	/* dram position (in word) -- mem_offset is byte */  in snd_emu8000_sample_new()
173 	dram_offset = EMU8000_DRAM_OFFSET + (sp->block->offset >> 1);  in snd_emu8000_sample_new()
177 	sp->v.truesize = truesize * 2; /* in bytes */  in snd_emu8000_sample_new()
179 	snd_emux_terminate_all(emu->emu);  in snd_emu8000_sample_new()
191 	/* first block - write 48 samples for silence */  in snd_emu8000_sample_new()
192 	if (! sp->block->offset) {  in snd_emu8000_sample_new()
200 	for (i = 0; i < sp->v.size; i++) {  in snd_emu8000_sample_new()
203 		s = read_word(data, offset, sp->v.mode_flags);  in snd_emu8000_sample_new()
212 		if (i == sp->v.loopend &&  in snd_emu8000_sample_new()
213 		    (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP)))  in snd_emu8000_sample_new()
215 			int looplen = sp->v.loopend - sp->v.loopstart;  in snd_emu8000_sample_new()
219 			for (k = 1; k <= looplen; k++) {  in snd_emu8000_sample_new()
220 				s = read_word(data, offset - k, sp->v.mode_flags);  in snd_emu8000_sample_new()
223 			if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_BIDIR_LOOP) {  in snd_emu8000_sample_new()
224 				sp->v.loopend += looplen;  in snd_emu8000_sample_new()
226 				sp->v.loopstart += looplen;  in snd_emu8000_sample_new()
227 				sp->v.loopend += looplen;  in snd_emu8000_sample_new()
229 			sp->v.end += looplen;  in snd_emu8000_sample_new()
233 	/* if no blank loop is attached in the sample, add it */  in snd_emu8000_sample_new()
234 	if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) {  in snd_emu8000_sample_new()
238 		if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT) {  in snd_emu8000_sample_new()
239 			sp->v.loopstart = sp->v.end + BLANK_LOOP_START;  in snd_emu8000_sample_new()
240 			sp->v.loopend = sp->v.end + BLANK_LOOP_END;  in snd_emu8000_sample_new()
245 	sp->v.start += dram_start;  in snd_emu8000_sample_new()
246 	sp->v.end += dram_start;  in snd_emu8000_sample_new()
247 	sp->v.loopstart += dram_start;  in snd_emu8000_sample_new()
248 	sp->v.loopend += dram_start;  in snd_emu8000_sample_new()
263 	if (sp->block) {  in snd_emu8000_sample_free()
264 		snd_util_mem_free(hdr, sp->block);  in snd_emu8000_sample_free()
265 		sp->block = NULL;  in snd_emu8000_sample_free()
272  * sample_reset callback - terminate voices