// SPDX-License-Identifier: GPL-2.0-or-later /* * Patch routines for the emu8000 (AWE32/64) * * Copyright (C) 1999 Steve Ratcliffe * Copyright (C) 1999-2000 Takashi Iwai */ #include "emu8000_local.h" #include #include #include 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; /* 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) { /* not ENOMEM (for compatibility) */ return -ENOSPC; } if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS) { if (!access_ok(data, sp->v.size)) return -EFAULT; } else { if (!access_ok(data, sp->v.size * 2)) return -EFAULT; } /* 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); rc = snd_emu8000_open_dma(emu, EMU8000_RAM_WRITE); if (rc) 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); }