--- /dev/null
+/*
+ * 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 <linux/uaccess.h>
+#include <linux/moduleparam.h>
+
+static int emu8000_reset_addr;
+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(struct snd_emu8000 *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(struct snd_emu8000 *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(struct snd_emu8000 *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(struct snd_emu8000 *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(struct snd_emux *rec, struct snd_sf_sample *sp,
+ struct snd_util_memhdr *hdr,
+ const void __user *data, long count)
+{
+ int i;
+ int rc;
+ int offset;
+ int truesize;
+ int dram_offset, dram_start;
+ struct snd_emu8000 *emu;
+
+ emu = rec->hw;
+ if (snd_BUG_ON(!sp))
+ 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(struct snd_emux *rec, struct snd_sf_sample *sp,
+ struct snd_util_memhdr *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(struct snd_emux *rec)
+{
+ snd_emux_terminate_all(rec);
+}
Code Review / kvmfornfv.git / blobdiff