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Add CS423x EEPROM persistence

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This commit is contained in:
RichardG867
2021-07-09 17:00:15 -03:00
parent c39587cfab
commit 4ff0a72765
1 changed files with 36 additions and 4 deletions
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40
src/sound/snd_cs423x.c
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@@ -34,6 +34,7 @@
#include <86box/snd_ad1848.h>
#include <86box/snd_opl.h>
#include <86box/snd_sb.h>
#include <86box/nvr.h>
enum {
@@ -135,6 +136,7 @@ typedef struct cs423x_t
uint16_t wss_base, opl_base, sb_base, ctrl_base, ram_addr, eeprom_size: 11;
uint8_t type, ad1848_type, pnp_offset, regs[8], indirect_regs[16],
eeprom_data[2048], ram_data[384], ram_dl: 2, opl_wss: 1;
char *nvr_path;
uint8_t pnp_enable: 1, key_pos: 5, slam_enable: 1, slam_state: 2, slam_ld, slam_reg;
isapnp_device_config_t *slam_config;
@@ -146,6 +148,20 @@ static void cs423x_pnp_enable(cs423x_t *dev, uint8_t update_rom, uint8_t update_
static void cs423x_pnp_config_changed(uint8_t ld, isapnp_device_config_t *config, void *priv);
static void
cs423x_nvram(cs423x_t *dev, uint8_t save)
{
FILE *f = nvr_fopen(dev->nvr_path, save ? "wb" : "rb");
if (f) {
if (save)
fwrite(dev->eeprom_data, sizeof(dev->eeprom_data), 1, f);
else
fread(dev->eeprom_data, sizeof(dev->eeprom_data), 1, f);
fclose(f);
}
}
static uint8_t
cs423x_read(uint16_t addr, void *priv)
{
@@ -678,10 +694,14 @@ cs423x_reset(void *priv)
cs423x_t *dev = (cs423x_t *) priv;
/* Load EEPROM data to RAM, or just clear RAM if there's no EEPROM. */
if (dev->eeprom)
if (dev->eeprom) {
memcpy(dev->ram_data, &dev->eeprom_data[4], MIN(sizeof(dev->ram_data), sizeof(dev->eeprom_data) - 4));
else
/* Save EEPROM contents to file. */
cs423x_nvram(dev, 1);
} else {
memset(dev->ram_data, 0, sizeof(dev->ram_data));
}
/* Reset registers. */
memset(dev->indirect_regs, 0, sizeof(dev->indirect_regs));
@@ -729,17 +749,26 @@ cs423x_init(const device_t *info)
dev->eeprom_data[2] = sizeof(cs4236b_eeprom) >> 8;
dev->eeprom_data[3] = sizeof(cs4236b_eeprom) & 0xff;
/* Set PnP card ID. */
/* Set PnP card ID and EEPROM file name. */
switch (dev->type) {
case CRYSTAL_CS4236B:
dev->nvr_path = "cs4236b.nvr";
break;
case CRYSTAL_CS4237B:
dev->eeprom_data[26] = 0x37;
dev->nvr_path = "cs4237b.nvr";
break;
case CRYSTAL_CS4238B:
dev->eeprom_data[26] = 0x38;
dev->nvr_path = "cs4238b.nvr";
break;
}
/* Load EEPROM contents from file if present. */
cs423x_nvram(dev, 0);
/* Initialize game port. The '7B and '8B game port only responds to 6 I/O ports; the remaining
2 ports are reserved on those chips, and probably connected to the Digital Assist feature. */
dev->gameport = gameport_add((dev->type == CRYSTAL_CS4236B) ? &gameport_pnp_device : &gameport_pnp_6io_device);
@@ -774,8 +803,11 @@ cs423x_close(void *priv)
{
cs423x_t *dev = (cs423x_t *) priv;
if (dev->eeprom)
/* Save EEPROM contents to file. */
if (dev->eeprom) {
cs423x_nvram(dev, 1);
i2c_eeprom_close(dev->eeprom);
}
i2c_gpio_close(dev->i2c);