1 /* 2 * linux/drivers/sound/vidc.h 3 * 4 * Copyright (C) 1997 Russell King <rmk@arm.linux.org.uk> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * VIDC sound function prototypes 11 */ 12 13 /* vidc_fill.S */ 14 15 /* 16 * Filler routines for different channels and sample sizes 17 */ 18 19 extern unsigned long vidc_fill_1x8_u(unsigned long ibuf, unsigned long iend, 20 unsigned long obuf, int mask); 21 extern unsigned long vidc_fill_2x8_u(unsigned long ibuf, unsigned long iend, 22 unsigned long obuf, int mask); 23 extern unsigned long vidc_fill_1x8_s(unsigned long ibuf, unsigned long iend, 24 unsigned long obuf, int mask); 25 extern unsigned long vidc_fill_2x8_s(unsigned long ibuf, unsigned long iend, 26 unsigned long obuf, int mask); 27 extern unsigned long vidc_fill_1x16_s(unsigned long ibuf, unsigned long iend, 28 unsigned long obuf, int mask); 29 extern unsigned long vidc_fill_2x16_s(unsigned long ibuf, unsigned long iend, 30 unsigned long obuf, int mask); 31 32 /* 33 * DMA Interrupt handler 34 */ 35 36 extern irqreturn_t vidc_sound_dma_irq(int irqnr, void *ref); 37 38 /* 39 * Filler routine pointer 40 */ 41 42 extern unsigned long (*vidc_filler) (unsigned long ibuf, unsigned long iend, 43 unsigned long obuf, int mask); 44 45 /* 46 * Virtual DMA buffer exhausted 47 */ 48 49 extern irqreturn_t (*dma_interrupt) (void); 50 51 /* 52 * Virtual DMA buffer addresses 53 */ 54 55 extern unsigned long dma_start, dma_count, dma_bufsize; 56 extern unsigned long dma_buf[2], dma_pbuf[2]; 57 58 /* vidc_synth.c */ 59 60 extern void vidc_synth_init(struct address_info *hw_config); 61 extern void vidc_synth_exit(struct address_info *hw_config); 62 extern int vidc_synth_get_volume(void); 63 extern int vidc_synth_set_volume(int vol); 64