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s3c2410_spi.c
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s3c2410_spi.c
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/* $Id: s3c2410_spi.c,v 1.4 2008/12/11 12:18:17 ecd Exp $
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <errno.h>
#include <x49gp.h>
#include <s3c2410.h>
#include <s3c2410_intc.h>
typedef struct {
uint32_t spicon0;
uint32_t spista0;
uint32_t sppin0;
uint32_t sppre0;
uint32_t sptdat0;
uint32_t sprdat0;
uint32_t spicon1;
uint32_t spista1;
uint32_t sppin1;
uint32_t sppre1;
uint32_t sptdat1;
uint32_t sprdat1;
unsigned int nr_regs;
s3c2410_offset_t *regs;
x49gp_t *x49gp;
} s3c2410_spi_t;
static int
s3c2410_spi_data_init(s3c2410_spi_t *spi)
{
s3c2410_offset_t regs[] =
{
S3C2410_OFFSET(SPI, SPICON0, 0x00000000, spi->spicon0),
S3C2410_OFFSET(SPI, SPISTA0, 0x00000000, spi->spista0),
S3C2410_OFFSET(SPI, SPPIN0, 0x00000000, spi->sppin0),
S3C2410_OFFSET(SPI, SPPRE0, 0x00000000, spi->sppre0),
S3C2410_OFFSET(SPI, SPTDAT0, 0x00000000, spi->sptdat0),
S3C2410_OFFSET(SPI, SPRDAT0, 0x00000000, spi->sprdat0),
S3C2410_OFFSET(SPI, SPICON1, 0x00000000, spi->spicon1),
S3C2410_OFFSET(SPI, SPISTA1, 0x00000000, spi->spista1),
S3C2410_OFFSET(SPI, SPPIN1, 0x00000000, spi->sppin1),
S3C2410_OFFSET(SPI, SPPRE1, 0x00000000, spi->sppre1),
S3C2410_OFFSET(SPI, SPTDAT1, 0x00000000, spi->sptdat1),
S3C2410_OFFSET(SPI, SPRDAT1, 0x00000000, spi->sprdat1),
};
memset(spi, 0, sizeof(s3c2410_spi_t));
spi->regs = malloc(sizeof(regs));
if (NULL == spi->regs) {
fprintf(stderr, "%s:%u: Out of memory\n",
__FUNCTION__, __LINE__);
return -ENOMEM;
}
memcpy(spi->regs, regs, sizeof(regs));
spi->nr_regs = sizeof(regs) / sizeof(regs[0]);
return 0;
}
uint32_t
s3c2410_spi_read(void *opaque, target_phys_addr_t offset)
{
s3c2410_spi_t *spi = opaque;
s3c2410_offset_t *reg;
#ifdef QEMU_OLD
offset -= S3C2410_SPI_BASE;
#endif
if (! S3C2410_OFFSET_OK(spi, offset)) {
return ~(0);
}
reg = S3C2410_OFFSET_ENTRY(spi, offset);
#ifdef DEBUG_S3C2410_SPI
printf("read %s [%08x] %s [%08x] data %08x\n",
"s3c2410-spi", S3C2410_SPI_BASE,
reg->name, offset, *(reg->datap));
#endif
switch (offset) {
case S3C2410_SPI_SPRDAT0:
spi->spista0 &= ~(1);
break;
case S3C2410_SPI_SPRDAT1:
spi->spista1 &= ~(1);
break;
}
return *(reg->datap);
}
void
s3c2410_spi_write(void *opaque, target_phys_addr_t offset, uint32_t data)
{
s3c2410_spi_t *spi = opaque;
x49gp_t *x49gp = spi->x49gp;
s3c2410_offset_t *reg;
#ifdef QEMU_OLD
offset -= S3C2410_SPI_BASE;
#endif
if (! S3C2410_OFFSET_OK(spi, offset)) {
return;
}
reg = S3C2410_OFFSET_ENTRY(spi, offset);
#ifdef DEBUG_S3C2410_SPI
printf("write %s [%08x] %s [%08x] data %08x\n",
"s3c2410-spi", S3C2410_SPI_BASE,
reg->name, offset, data);
#endif
*(reg->datap) = data;
switch (offset) {
case S3C2410_SPI_SPTDAT0:
spi->spista0 |= 1;
s3c2410_intc_assert(x49gp, INT_SPI0, 0);
break;
case S3C2410_SPI_SPTDAT1:
spi->spista1 |= 1;
s3c2410_intc_assert(x49gp, INT_SPI1, 0);
break;
}
}
static int
s3c2410_spi_load(x49gp_module_t *module, GKeyFile *key)
{
s3c2410_spi_t *spi = module->user_data;
s3c2410_offset_t *reg;
int error = 0;
int i;
#ifdef DEBUG_X49GP_MODULES
printf("%s: %s:%u\n", module->name, __FUNCTION__, __LINE__);
#endif
for (i = 0; i < spi->nr_regs; i++) {
reg = &spi->regs[i];
if (NULL == reg->name)
continue;
if (x49gp_module_get_u32(module, key, reg->name,
reg->reset, reg->datap))
error = -EAGAIN;
}
return error;
}
static int
s3c2410_spi_save(x49gp_module_t *module, GKeyFile *key)
{
s3c2410_spi_t *spi = module->user_data;
s3c2410_offset_t *reg;
int i;
#ifdef DEBUG_X49GP_MODULES
printf("%s: %s:%u\n", module->name, __FUNCTION__, __LINE__);
#endif
for (i = 0; i < spi->nr_regs; i++) {
reg = &spi->regs[i];
if (NULL == reg->name)
continue;
x49gp_module_set_u32(module, key, reg->name, *(reg->datap));
}
return 0;
}
static int
s3c2410_spi_reset(x49gp_module_t *module, x49gp_reset_t reset)
{
s3c2410_spi_t *spi = module->user_data;
s3c2410_offset_t *reg;
int i;
#ifdef DEBUG_X49GP_MODULES
printf("%s: %s:%u\n", module->name, __FUNCTION__, __LINE__);
#endif
for (i = 0; i < spi->nr_regs; i++) {
reg = &spi->regs[i];
if (NULL == reg->name)
continue;
*(reg->datap) = reg->reset;
}
return 0;
}
static CPUReadMemoryFunc *s3c2410_spi_readfn[] =
{
s3c2410_spi_read,
s3c2410_spi_read,
s3c2410_spi_read
};
static CPUWriteMemoryFunc *s3c2410_spi_writefn[] =
{
s3c2410_spi_write,
s3c2410_spi_write,
s3c2410_spi_write
};
static int
s3c2410_spi_init(x49gp_module_t *module)
{
s3c2410_spi_t *spi;
int iotype;
#ifdef DEBUG_X49GP_MODULES
printf("%s: %s:%u\n", module->name, __FUNCTION__, __LINE__);
#endif
spi = malloc(sizeof(s3c2410_spi_t));
if (NULL == spi) {
fprintf(stderr, "%s:%u: Out of memory\n",
__FUNCTION__, __LINE__);
return -ENOMEM;
}
if (s3c2410_spi_data_init(spi)) {
free(spi);
return -ENOMEM;
}
module->user_data = spi;
spi->x49gp = module->x49gp;
#ifdef QEMU_OLD
iotype = cpu_register_io_memory(0, s3c2410_spi_readfn,
s3c2410_spi_writefn, spi);
#else
iotype = cpu_register_io_memory(s3c2410_spi_readfn,
s3c2410_spi_writefn, spi);
#endif
printf("%s: iotype %08x\n", __FUNCTION__, iotype);
cpu_register_physical_memory(S3C2410_SPI_BASE, S3C2410_MAP_SIZE, iotype);
return 0;
}
static int
s3c2410_spi_exit(x49gp_module_t *module)
{
s3c2410_spi_t *spi;
#ifdef DEBUG_X49GP_MODULES
printf("%s: %s:%u\n", module->name, __FUNCTION__, __LINE__);
#endif
if (module->user_data) {
spi = module->user_data;
if (spi->regs)
free(spi->regs);
free(spi);
}
x49gp_module_unregister(module);
free(module);
return 0;
}
int
x49gp_s3c2410_spi_init(x49gp_t *x49gp)
{
x49gp_module_t *module;
if (x49gp_module_init(x49gp, "s3c2410-spi",
s3c2410_spi_init,
s3c2410_spi_exit,
s3c2410_spi_reset,
s3c2410_spi_load,
s3c2410_spi_save,
NULL, &module)) {
return -1;
}
return x49gp_module_register(module);
}