639 lines
14 KiB
C
639 lines
14 KiB
C
/*
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* linux/sound/oss/dmasound/dmasound_q40.c
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*
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* Q40 DMA Sound Driver
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*
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* See linux/sound/oss/dmasound/dmasound_core.c for copyright and credits
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* prior to 28/01/2001
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*
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* 28/01/2001 [0.1] Iain Sandoe
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* - added versioning
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* - put in and populated the hardware_afmts field.
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* [0.2] - put in SNDCTL_DSP_GETCAPS value.
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* [0.3] - put in default hard/soft settings.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/soundcard.h>
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#include <linux/interrupt.h>
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#include <asm/uaccess.h>
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#include <asm/q40ints.h>
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#include <asm/q40_master.h>
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#include "dmasound.h"
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#define DMASOUND_Q40_REVISION 0
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#define DMASOUND_Q40_EDITION 3
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static int expand_bal; /* Balance factor for expanding (not volume!) */
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static int expand_data; /* Data for expanding */
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/*** Low level stuff *********************************************************/
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static void *Q40Alloc(unsigned int size, gfp_t flags);
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static void Q40Free(void *, unsigned int);
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static int Q40IrqInit(void);
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#ifdef MODULE
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static void Q40IrqCleanUp(void);
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#endif
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static void Q40Silence(void);
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static void Q40Init(void);
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static int Q40SetFormat(int format);
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static int Q40SetVolume(int volume);
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static void Q40PlayNextFrame(int index);
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static void Q40Play(void);
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static irqreturn_t Q40StereoInterrupt(int irq, void *dummy);
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static irqreturn_t Q40MonoInterrupt(int irq, void *dummy);
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static void Q40Interrupt(void);
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/*** Mid level stuff *********************************************************/
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/* userCount, frameUsed, frameLeft == byte counts */
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static ssize_t q40_ct_law(const u_char __user *userPtr, size_t userCount,
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u_char frame[], ssize_t *frameUsed,
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ssize_t frameLeft)
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{
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char *table = dmasound.soft.format == AFMT_MU_LAW ? dmasound_ulaw2dma8: dmasound_alaw2dma8;
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ssize_t count, used;
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u_char *p = (u_char *) &frame[*frameUsed];
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used = count = min_t(size_t, userCount, frameLeft);
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if (copy_from_user(p,userPtr,count))
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return -EFAULT;
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while (count > 0) {
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*p = table[*p]+128;
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p++;
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count--;
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}
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*frameUsed += used ;
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return used;
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}
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static ssize_t q40_ct_s8(const u_char __user *userPtr, size_t userCount,
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u_char frame[], ssize_t *frameUsed,
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ssize_t frameLeft)
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{
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ssize_t count, used;
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u_char *p = (u_char *) &frame[*frameUsed];
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used = count = min_t(size_t, userCount, frameLeft);
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if (copy_from_user(p,userPtr,count))
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return -EFAULT;
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while (count > 0) {
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*p = *p + 128;
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p++;
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count--;
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}
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*frameUsed += used;
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return used;
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}
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static ssize_t q40_ct_u8(const u_char __user *userPtr, size_t userCount,
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u_char frame[], ssize_t *frameUsed,
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ssize_t frameLeft)
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{
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ssize_t count, used;
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u_char *p = (u_char *) &frame[*frameUsed];
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used = count = min_t(size_t, userCount, frameLeft);
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if (copy_from_user(p,userPtr,count))
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return -EFAULT;
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*frameUsed += used;
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return used;
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}
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/* a bit too complicated to optimise right now ..*/
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static ssize_t q40_ctx_law(const u_char __user *userPtr, size_t userCount,
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u_char frame[], ssize_t *frameUsed,
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ssize_t frameLeft)
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{
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unsigned char *table = (unsigned char *)
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(dmasound.soft.format == AFMT_MU_LAW ? dmasound_ulaw2dma8: dmasound_alaw2dma8);
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unsigned int data = expand_data;
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u_char *p = (u_char *) &frame[*frameUsed];
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int bal = expand_bal;
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int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
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int utotal, ftotal;
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ftotal = frameLeft;
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utotal = userCount;
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while (frameLeft) {
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u_char c;
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if (bal < 0) {
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if (userCount == 0)
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break;
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if (get_user(c, userPtr++))
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return -EFAULT;
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data = table[c];
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data += 0x80;
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userCount--;
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bal += hSpeed;
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}
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*p++ = data;
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frameLeft--;
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bal -= sSpeed;
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}
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expand_bal = bal;
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expand_data = data;
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*frameUsed += (ftotal - frameLeft);
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utotal -= userCount;
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return utotal;
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}
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static ssize_t q40_ctx_s8(const u_char __user *userPtr, size_t userCount,
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u_char frame[], ssize_t *frameUsed,
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ssize_t frameLeft)
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{
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u_char *p = (u_char *) &frame[*frameUsed];
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unsigned int data = expand_data;
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int bal = expand_bal;
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int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
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int utotal, ftotal;
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ftotal = frameLeft;
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utotal = userCount;
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while (frameLeft) {
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u_char c;
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if (bal < 0) {
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if (userCount == 0)
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break;
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if (get_user(c, userPtr++))
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return -EFAULT;
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data = c ;
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data += 0x80;
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userCount--;
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bal += hSpeed;
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}
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*p++ = data;
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frameLeft--;
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bal -= sSpeed;
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}
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expand_bal = bal;
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expand_data = data;
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*frameUsed += (ftotal - frameLeft);
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utotal -= userCount;
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return utotal;
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}
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static ssize_t q40_ctx_u8(const u_char __user *userPtr, size_t userCount,
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u_char frame[], ssize_t *frameUsed,
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ssize_t frameLeft)
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{
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u_char *p = (u_char *) &frame[*frameUsed];
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unsigned int data = expand_data;
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int bal = expand_bal;
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int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
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int utotal, ftotal;
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ftotal = frameLeft;
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utotal = userCount;
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while (frameLeft) {
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u_char c;
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if (bal < 0) {
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if (userCount == 0)
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break;
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if (get_user(c, userPtr++))
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return -EFAULT;
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data = c ;
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userCount--;
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bal += hSpeed;
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}
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*p++ = data;
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frameLeft--;
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bal -= sSpeed;
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}
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expand_bal = bal;
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expand_data = data;
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*frameUsed += (ftotal - frameLeft) ;
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utotal -= userCount;
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return utotal;
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}
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/* compressing versions */
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static ssize_t q40_ctc_law(const u_char __user *userPtr, size_t userCount,
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u_char frame[], ssize_t *frameUsed,
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ssize_t frameLeft)
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{
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unsigned char *table = (unsigned char *)
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(dmasound.soft.format == AFMT_MU_LAW ? dmasound_ulaw2dma8: dmasound_alaw2dma8);
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unsigned int data = expand_data;
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u_char *p = (u_char *) &frame[*frameUsed];
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int bal = expand_bal;
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int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
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int utotal, ftotal;
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ftotal = frameLeft;
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utotal = userCount;
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while (frameLeft) {
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u_char c;
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while(bal<0) {
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if (userCount == 0)
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goto lout;
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if (!(bal<(-hSpeed))) {
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if (get_user(c, userPtr))
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return -EFAULT;
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data = 0x80 + table[c];
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}
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userPtr++;
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userCount--;
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bal += hSpeed;
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}
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*p++ = data;
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frameLeft--;
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bal -= sSpeed;
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}
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lout:
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expand_bal = bal;
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expand_data = data;
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*frameUsed += (ftotal - frameLeft);
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utotal -= userCount;
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return utotal;
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}
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static ssize_t q40_ctc_s8(const u_char __user *userPtr, size_t userCount,
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u_char frame[], ssize_t *frameUsed,
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ssize_t frameLeft)
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{
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u_char *p = (u_char *) &frame[*frameUsed];
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unsigned int data = expand_data;
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int bal = expand_bal;
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int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
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int utotal, ftotal;
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ftotal = frameLeft;
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utotal = userCount;
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while (frameLeft) {
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u_char c;
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while (bal < 0) {
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if (userCount == 0)
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goto lout;
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if (!(bal<(-hSpeed))) {
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if (get_user(c, userPtr))
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return -EFAULT;
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data = c + 0x80;
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}
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userPtr++;
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userCount--;
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bal += hSpeed;
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}
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*p++ = data;
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frameLeft--;
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bal -= sSpeed;
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}
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lout:
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expand_bal = bal;
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expand_data = data;
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*frameUsed += (ftotal - frameLeft);
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utotal -= userCount;
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return utotal;
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}
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static ssize_t q40_ctc_u8(const u_char __user *userPtr, size_t userCount,
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u_char frame[], ssize_t *frameUsed,
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ssize_t frameLeft)
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{
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u_char *p = (u_char *) &frame[*frameUsed];
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unsigned int data = expand_data;
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int bal = expand_bal;
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int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed;
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int utotal, ftotal;
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ftotal = frameLeft;
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utotal = userCount;
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while (frameLeft) {
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u_char c;
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while (bal < 0) {
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if (userCount == 0)
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goto lout;
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if (!(bal<(-hSpeed))) {
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if (get_user(c, userPtr))
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return -EFAULT;
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data = c ;
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}
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userPtr++;
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userCount--;
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bal += hSpeed;
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}
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*p++ = data;
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frameLeft--;
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bal -= sSpeed;
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}
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lout:
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expand_bal = bal;
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expand_data = data;
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*frameUsed += (ftotal - frameLeft) ;
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utotal -= userCount;
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return utotal;
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}
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static TRANS transQ40Normal = {
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q40_ct_law, q40_ct_law, q40_ct_s8, q40_ct_u8, NULL, NULL, NULL, NULL
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};
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static TRANS transQ40Expanding = {
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q40_ctx_law, q40_ctx_law, q40_ctx_s8, q40_ctx_u8, NULL, NULL, NULL, NULL
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};
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static TRANS transQ40Compressing = {
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q40_ctc_law, q40_ctc_law, q40_ctc_s8, q40_ctc_u8, NULL, NULL, NULL, NULL
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};
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/*** Low level stuff *********************************************************/
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static void *Q40Alloc(unsigned int size, gfp_t flags)
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{
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return kmalloc(size, flags); /* change to vmalloc */
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}
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static void Q40Free(void *ptr, unsigned int size)
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{
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kfree(ptr);
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}
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static int __init Q40IrqInit(void)
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{
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/* Register interrupt handler. */
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if (request_irq(Q40_IRQ_SAMPLE, Q40StereoInterrupt, 0,
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"DMA sound", Q40Interrupt))
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return 0;
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return(1);
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}
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#ifdef MODULE
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static void Q40IrqCleanUp(void)
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{
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master_outb(0,SAMPLE_ENABLE_REG);
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free_irq(Q40_IRQ_SAMPLE, Q40Interrupt);
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}
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#endif /* MODULE */
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static void Q40Silence(void)
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{
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master_outb(0,SAMPLE_ENABLE_REG);
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*DAC_LEFT=*DAC_RIGHT=127;
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}
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static char *q40_pp;
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static unsigned int q40_sc;
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static void Q40PlayNextFrame(int index)
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{
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u_char *start;
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u_long size;
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u_char speed;
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int error;
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/* used by Q40Play() if all doubts whether there really is something
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* to be played are already wiped out.
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*/
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start = write_sq.buffers[write_sq.front];
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size = (write_sq.count == index ? write_sq.rear_size : write_sq.block_size);
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q40_pp=start;
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q40_sc=size;
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write_sq.front = (write_sq.front+1) % write_sq.max_count;
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write_sq.active++;
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speed=(dmasound.hard.speed==10000 ? 0 : 1);
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master_outb( 0,SAMPLE_ENABLE_REG);
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free_irq(Q40_IRQ_SAMPLE, Q40Interrupt);
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if (dmasound.soft.stereo)
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error = request_irq(Q40_IRQ_SAMPLE, Q40StereoInterrupt, 0,
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"Q40 sound", Q40Interrupt);
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else
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error = request_irq(Q40_IRQ_SAMPLE, Q40MonoInterrupt, 0,
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"Q40 sound", Q40Interrupt);
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if (error && printk_ratelimit())
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pr_err("Couldn't register sound interrupt\n");
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master_outb( speed, SAMPLE_RATE_REG);
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master_outb( 1,SAMPLE_CLEAR_REG);
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master_outb( 1,SAMPLE_ENABLE_REG);
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}
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static void Q40Play(void)
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{
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unsigned long flags;
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if (write_sq.active || write_sq.count<=0 ) {
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/* There's already a frame loaded */
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return;
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}
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/* nothing in the queue */
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if (write_sq.count <= 1 && write_sq.rear_size < write_sq.block_size && !write_sq.syncing) {
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/* hmmm, the only existing frame is not
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* yet filled and we're not syncing?
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*/
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return;
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}
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spin_lock_irqsave(&dmasound.lock, flags);
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Q40PlayNextFrame(1);
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spin_unlock_irqrestore(&dmasound.lock, flags);
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}
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static irqreturn_t Q40StereoInterrupt(int irq, void *dummy)
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{
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spin_lock(&dmasound.lock);
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if (q40_sc>1){
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*DAC_LEFT=*q40_pp++;
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*DAC_RIGHT=*q40_pp++;
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q40_sc -=2;
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master_outb(1,SAMPLE_CLEAR_REG);
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}else Q40Interrupt();
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spin_unlock(&dmasound.lock);
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return IRQ_HANDLED;
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}
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static irqreturn_t Q40MonoInterrupt(int irq, void *dummy)
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{
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spin_lock(&dmasound.lock);
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if (q40_sc>0){
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*DAC_LEFT=*q40_pp;
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*DAC_RIGHT=*q40_pp++;
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q40_sc --;
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master_outb(1,SAMPLE_CLEAR_REG);
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}else Q40Interrupt();
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spin_unlock(&dmasound.lock);
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return IRQ_HANDLED;
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}
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static void Q40Interrupt(void)
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{
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if (!write_sq.active) {
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/* playing was interrupted and sq_reset() has already cleared
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* the sq variables, so better don't do anything here.
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*/
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WAKE_UP(write_sq.sync_queue);
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master_outb(0,SAMPLE_ENABLE_REG); /* better safe */
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goto exit;
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} else write_sq.active=0;
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write_sq.count--;
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Q40Play();
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if (q40_sc<2)
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{ /* there was nothing to play, disable irq */
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master_outb(0,SAMPLE_ENABLE_REG);
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*DAC_LEFT=*DAC_RIGHT=127;
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}
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WAKE_UP(write_sq.action_queue);
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exit:
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master_outb(1,SAMPLE_CLEAR_REG);
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}
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static void Q40Init(void)
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{
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int i, idx;
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const int freq[] = {10000, 20000};
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/* search a frequency that fits into the allowed error range */
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idx = -1;
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for (i = 0; i < 2; i++)
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if ((100 * abs(dmasound.soft.speed - freq[i]) / freq[i]) <= catchRadius)
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idx = i;
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dmasound.hard = dmasound.soft;
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/*sound.hard.stereo=1;*/ /* no longer true */
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dmasound.hard.size=8;
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if (idx > -1) {
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dmasound.soft.speed = freq[idx];
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dmasound.trans_write = &transQ40Normal;
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} else
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dmasound.trans_write = &transQ40Expanding;
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Q40Silence();
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if (dmasound.hard.speed > 20200) {
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/* squeeze the sound, we do that */
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dmasound.hard.speed = 20000;
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dmasound.trans_write = &transQ40Compressing;
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} else if (dmasound.hard.speed > 10000) {
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dmasound.hard.speed = 20000;
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} else {
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dmasound.hard.speed = 10000;
|
|
}
|
|
expand_bal = -dmasound.soft.speed;
|
|
}
|
|
|
|
|
|
static int Q40SetFormat(int format)
|
|
{
|
|
/* Q40 sound supports only 8bit modes */
|
|
|
|
switch (format) {
|
|
case AFMT_QUERY:
|
|
return(dmasound.soft.format);
|
|
case AFMT_MU_LAW:
|
|
case AFMT_A_LAW:
|
|
case AFMT_S8:
|
|
case AFMT_U8:
|
|
break;
|
|
default:
|
|
format = AFMT_S8;
|
|
}
|
|
|
|
dmasound.soft.format = format;
|
|
dmasound.soft.size = 8;
|
|
if (dmasound.minDev == SND_DEV_DSP) {
|
|
dmasound.dsp.format = format;
|
|
dmasound.dsp.size = 8;
|
|
}
|
|
Q40Init();
|
|
|
|
return(format);
|
|
}
|
|
|
|
static int Q40SetVolume(int volume)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*** Machine definitions *****************************************************/
|
|
|
|
static SETTINGS def_hard = {
|
|
.format = AFMT_U8,
|
|
.stereo = 0,
|
|
.size = 8,
|
|
.speed = 10000
|
|
} ;
|
|
|
|
static SETTINGS def_soft = {
|
|
.format = AFMT_U8,
|
|
.stereo = 0,
|
|
.size = 8,
|
|
.speed = 8000
|
|
} ;
|
|
|
|
static MACHINE machQ40 = {
|
|
.name = "Q40",
|
|
.name2 = "Q40",
|
|
.owner = THIS_MODULE,
|
|
.dma_alloc = Q40Alloc,
|
|
.dma_free = Q40Free,
|
|
.irqinit = Q40IrqInit,
|
|
#ifdef MODULE
|
|
.irqcleanup = Q40IrqCleanUp,
|
|
#endif /* MODULE */
|
|
.init = Q40Init,
|
|
.silence = Q40Silence,
|
|
.setFormat = Q40SetFormat,
|
|
.setVolume = Q40SetVolume,
|
|
.play = Q40Play,
|
|
.min_dsp_speed = 10000,
|
|
.version = ((DMASOUND_Q40_REVISION<<8) | DMASOUND_Q40_EDITION),
|
|
.hardware_afmts = AFMT_U8, /* h'ware-supported formats *only* here */
|
|
.capabilities = DSP_CAP_BATCH /* As per SNDCTL_DSP_GETCAPS */
|
|
};
|
|
|
|
|
|
/*** Config & Setup **********************************************************/
|
|
|
|
|
|
static int __init dmasound_q40_init(void)
|
|
{
|
|
if (MACH_IS_Q40) {
|
|
dmasound.mach = machQ40;
|
|
dmasound.mach.default_hard = def_hard ;
|
|
dmasound.mach.default_soft = def_soft ;
|
|
return dmasound_init();
|
|
} else
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void __exit dmasound_q40_cleanup(void)
|
|
{
|
|
dmasound_deinit();
|
|
}
|
|
|
|
module_init(dmasound_q40_init);
|
|
module_exit(dmasound_q40_cleanup);
|
|
|
|
MODULE_DESCRIPTION("Q40/Q60 sound driver");
|
|
MODULE_LICENSE("GPL");
|