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/*
* QEMU Crystal CS4231 audio chip emulation
*
* Copyright (c) 2006 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "vl.h"
/* debug CS4231 */
//#define DEBUG_CS
/*
* In addition to Crystal CS4231 there is a DMA controller on Sparc.
*/
#define CS_MAXADDR 0x3f
#define CS_SIZE (CS_MAXADDR + 1)
#define CS_REGS 16
#define CS_DREGS 32
#define CS_MAXDREG (CS_DREGS - 1)
typedef struct CSState {
uint32_t regs[CS_REGS];
uint8_t dregs[CS_DREGS];
void *intctl;
} CSState;
#define CS_RAP(s) ((s)->regs[0] & CS_MAXDREG)
#define CS_VER 0xa0
#define CS_CDC_VER 0x8a
#ifdef DEBUG_CS
#define DPRINTF(fmt, args...) \
do { printf("CS: " fmt , ##args); } while (0)
#else
#define DPRINTF(fmt, args...)
#endif
static void cs_reset(void *opaque)
{
CSState *s = opaque;
memset(s->regs, 0, CS_REGS * 4);
memset(s->dregs, 0, CS_DREGS);
s->dregs[12] = CS_CDC_VER;
s->dregs[25] = CS_VER;
}
static uint32_t cs_mem_readl(void *opaque, target_phys_addr_t addr)
{
CSState *s = opaque;
uint32_t saddr, ret;
saddr = (addr & CS_MAXADDR) >> 2;
switch (saddr) {
case 1:
switch (CS_RAP(s)) {
case 3: // Write only
ret = 0;
break;
default:
ret = s->dregs[CS_RAP(s)];
break;
}
DPRINTF("read dreg[%d]: 0x%8.8x\n", CS_RAP(s), ret);
break;
default:
ret = s->regs[saddr];
DPRINTF("read reg[%d]: 0x%8.8x\n", saddr, ret);
break;
}
return ret;
}
static void cs_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
CSState *s = opaque;
uint32_t saddr;
saddr = (addr & CS_MAXADDR) >> 2;
DPRINTF("write reg[%d]: 0x%8.8x -> 0x%8.8x\n", saddr, s->regs[saddr], val);
switch (saddr) {
case 1:
DPRINTF("write dreg[%d]: 0x%2.2x -> 0x%2.2x\n", CS_RAP(s), s->dregs[CS_RAP(s)], val);
switch(CS_RAP(s)) {
case 11:
case 25: // Read only
break;
case 12:
val &= 0x40;
val |= CS_CDC_VER; // Codec version
s->dregs[CS_RAP(s)] = val;
break;
default:
s->dregs[CS_RAP(s)] = val;
break;
}
break;
case 2: // Read only
break;
case 4:
if (val & 1)
cs_reset(s);
val &= 0x7f;
s->regs[saddr] = val;
break;
default:
s->regs[saddr] = val;
break;
}
}
static CPUReadMemoryFunc *cs_mem_read[3] = {
cs_mem_readl,
cs_mem_readl,
cs_mem_readl,
};
static CPUWriteMemoryFunc *cs_mem_write[3] = {
cs_mem_writel,
cs_mem_writel,
cs_mem_writel,
};
static void cs_save(QEMUFile *f, void *opaque)
{
CSState *s = opaque;
unsigned int i;
for (i = 0; i < CS_REGS; i++)
qemu_put_be32s(f, &s->regs[i]);
qemu_put_buffer(f, s->dregs, CS_DREGS);
}
static int cs_load(QEMUFile *f, void *opaque, int version_id)
{
CSState *s = opaque;
unsigned int i;
if (version_id > 1)
return -EINVAL;
for (i = 0; i < CS_REGS; i++)
qemu_get_be32s(f, &s->regs[i]);
qemu_get_buffer(f, s->dregs, CS_DREGS);
return 0;
}
void cs_init(target_phys_addr_t base, int irq, void *intctl)
{
int cs_io_memory;
CSState *s;
s = qemu_mallocz(sizeof(CSState));
if (!s)
return;
cs_io_memory = cpu_register_io_memory(0, cs_mem_read, cs_mem_write, s);
cpu_register_physical_memory(base, CS_SIZE, cs_io_memory);
register_savevm("cs4231", base, 1, cs_save, cs_load, s);
qemu_register_reset(cs_reset, s);
cs_reset(s);
}
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