--- /dev/null
+#include "eeprom.h"
+
+#define eeprom_LOG
+
+static uint16 eeprom_ram[64];
+
+void eeprom_set_di(uint32 state);
+void eeprom_set_cs(uint32 state);
+uint32 eeprom_get_do(void);
+
+#define EE_STATE_START 1
+#define EE_STATE_OP_A 2
+#define EE_STATE_OP_B 3
+#define EE_STATE_0 4
+#define EE_STATE_1 5
+#define EE_STATE_2 6
+#define EE_STATE_3 7
+#define EE_STATE_0_0 8
+#define EE_READ_ADDRESS 9
+#define EE_STATE_0_0_0 10
+#define EE_STATE_0_0_1 11
+#define EE_STATE_0_0_2 12
+#define EE_STATE_0_0_3 13
+#define EE_STATE_0_0_1_0 14
+#define EE_READ_DATA 15
+#define EE_STATE_BUSY 16
+#define EE_STATE_1_0 17
+#define EE_STATE_1_1 18
+#define EE_STATE_2_0 19
+#define EE_STATE_3_0 20
+
+uint16 jerry_ee_state = EE_STATE_START;
+uint16 jerry_ee_op = 0;
+uint16 jerry_ee_rstate = 0;
+uint16 jerry_ee_address_data = 0;
+uint16 jerry_ee_address_cnt = 6;
+uint16 jerry_ee_data = 0;
+uint16 jerry_ee_data_cnt = 16;
+uint16 jerry_writes_enabled = 0;
+uint16 jerry_ee_direct_jump = 0;
+FILE * jerry_ee_fp;
+extern char * jaguar_boot_dir;
+
+//////////////////////////////////////////////////////////////////////////////
+//
+//////////////////////////////////////////////////////////////////////////////
+//
+//
+//
+//
+//
+//
+//////////////////////////////////////////////////////////////////////////////
+void eeprom_init(void)
+{
+ static char eeprom_filename[256];
+ sprintf(eeprom_filename,"%s\\%s%.8x.eep",jaguar_boot_dir,jaguar_eeproms_path,jaguar_mainRom_crc32);
+ jerry_ee_fp=fopen(eeprom_filename,"rb");
+ if (jerry_ee_fp)
+ {
+ fread(eeprom_ram,1,128,jerry_ee_fp);
+ fclose(jerry_ee_fp);
+ fprintf(log_get(),"eeprom: loaded from %s\n",eeprom_filename);
+ jerry_ee_fp=fopen(eeprom_filename,"wrb");
+ }
+ else
+ {
+ fprintf(log_get(),"eeprom: creating %s\n",eeprom_filename);
+ jerry_ee_fp=fopen(eeprom_filename,"wb");
+ if (jerry_ee_fp==NULL)
+ fprintf(log_get(),"eeprom: could not open/create %s\n",eeprom_filename);
+ }
+}
+//////////////////////////////////////////////////////////////////////////////
+//
+//////////////////////////////////////////////////////////////////////////////
+//
+//
+//
+//
+//
+//
+//////////////////////////////////////////////////////////////////////////////
+void eeprom_reset(void)
+{
+ if (jerry_ee_fp==NULL)
+ memset(eeprom_ram,0xff,64*2);
+}
+//////////////////////////////////////////////////////////////////////////////
+//
+//////////////////////////////////////////////////////////////////////////////
+//
+//
+//
+//
+//
+//
+//////////////////////////////////////////////////////////////////////////////
+void eeprom_done(void)
+{
+ if (jerry_ee_fp)
+ {
+ fwrite(eeprom_ram,1,128,jerry_ee_fp);
+ fclose(jerry_ee_fp);
+ }
+ else
+ fprintf(log_get(),"eeprom: not saved\n");
+}
+//////////////////////////////////////////////////////////////////////////////
+//
+//////////////////////////////////////////////////////////////////////////////
+//
+//
+//
+//
+//
+//
+//////////////////////////////////////////////////////////////////////////////
+void eeprom_byte_write(uint32 offset, uint8 data)
+{
+ switch (offset)
+ {
+ case 0xf14001: break;
+ case 0xf14801: eeprom_set_di(data&0x01); break;
+ case 0xf15001: eeprom_set_cs(1); break;
+// default: fprintf(log_get(),"eeprom: unmapped 0x%.8x\n",offset); break;
+ }
+}
+//////////////////////////////////////////////////////////////////////////////
+//
+//////////////////////////////////////////////////////////////////////////////
+//
+//
+//
+//
+//
+//
+//////////////////////////////////////////////////////////////////////////////
+void eeprom_word_write(uint32 offset, uint16 data)
+{
+ eeprom_byte_write(offset+0,(data>>8)&0xff);
+ eeprom_byte_write(offset+1,(data&0xff));
+}
+//////////////////////////////////////////////////////////////////////////////
+//
+//////////////////////////////////////////////////////////////////////////////
+//
+//
+//
+//
+//
+//
+//////////////////////////////////////////////////////////////////////////////
+uint8 eeprom_byte_read(uint32 offset)
+{
+ switch (offset)
+ {
+ case 0xf14001: return(eeprom_get_do()); break;
+ case 0xf14801: break;
+ case 0xf15001: eeprom_set_cs(1); break;
+// default: fprintf(log_get(),"eeprom: unmapped 0x%.8x\n",offset); break;
+ }
+ return(0x00);
+}
+//////////////////////////////////////////////////////////////////////////////
+//
+//////////////////////////////////////////////////////////////////////////////
+//
+//
+//
+//
+//
+//
+//////////////////////////////////////////////////////////////////////////////
+uint16 eeprom_word_read(uint32 offset)
+{
+ uint16 data=eeprom_byte_read(offset+0);
+ data<<=8;
+ data|=eeprom_byte_read(offset+1);
+ return(data);
+}
+//////////////////////////////////////////////////////////////////////////////
+//
+//////////////////////////////////////////////////////////////////////////////
+//
+//
+//
+//
+//
+//
+//////////////////////////////////////////////////////////////////////////////
+void eeprom_set_di(uint32 data)
+{
+// fprintf(log_get(),"eeprom: di=%i\n",data);
+// fprintf(log_get(),"eeprom: state %i\n",jerry_ee_state);
+ switch (jerry_ee_state)
+ {
+ case EE_STATE_START: {
+ jerry_ee_state=EE_STATE_OP_A;
+ break;
+ }
+ case EE_STATE_OP_A: {
+ jerry_ee_op=(data<<1);
+ jerry_ee_state=EE_STATE_OP_B;
+ break;
+ }
+ case EE_STATE_OP_B: {
+ jerry_ee_op|=data;
+ jerry_ee_direct_jump=0;
+// fprintf(log_get(),"eeprom: opcode %i\n",jerry_ee_op);
+ switch (jerry_ee_op)
+ {
+ case 0: jerry_ee_state=EE_STATE_0; break;
+ case 1: jerry_ee_state=EE_STATE_1; break;
+ case 2: jerry_ee_state=EE_STATE_2; break;
+ case 3: jerry_ee_state=EE_STATE_3; break;
+ }
+ eeprom_set_di(data);
+ break;
+ }
+ case EE_STATE_0: {
+ jerry_ee_rstate=EE_STATE_0_0;
+ jerry_ee_state=EE_READ_ADDRESS;
+ jerry_ee_direct_jump=1;
+ jerry_ee_address_cnt=6;
+ jerry_ee_address_data=0;
+ break;
+ }
+ case EE_STATE_0_0: {
+ switch ((jerry_ee_address_data>>4)&0x03)
+ {
+ case 0: jerry_ee_state=EE_STATE_0_0_0; break;
+ case 1: jerry_ee_state=EE_STATE_0_0_1; break;
+ case 2: jerry_ee_state=EE_STATE_0_0_2; break;
+ case 3: jerry_ee_state=EE_STATE_0_0_3; break;
+ }
+ eeprom_set_di(data);
+ break;
+ }
+ case EE_STATE_0_0_0:{
+ // writes disable
+ // fprintf(log_get(),"eeprom: read only\n");
+ jerry_writes_enabled=0;
+ jerry_ee_state=EE_STATE_START;
+ break;
+ }
+ case EE_STATE_0_0_1:{
+ // writes all
+ jerry_ee_rstate=EE_STATE_0_0_1_0;
+ jerry_ee_state=EE_READ_DATA;
+ jerry_ee_data_cnt=16;
+ jerry_ee_data=0;
+ jerry_ee_direct_jump=1;
+ break;
+ }
+ case EE_STATE_0_0_1_0:{
+ // fprintf(log_get(),"eeprom: filling eeprom with 0x%.4x\n",data);
+ if (jerry_writes_enabled)
+ {
+ for (int i=0;i<64;i++)
+ eeprom_ram[i]=jerry_ee_data;
+ }
+ //else
+ // fprintf(log_get(),"eeprom: not writing because read only\n");
+ jerry_ee_state=EE_STATE_BUSY;
+ break;
+ }
+ case EE_STATE_0_0_2:{
+ // erase all
+ //fprintf(log_get(),"eeprom: erasing eeprom\n");
+ if (jerry_writes_enabled)
+ {
+ for (int i=0;i<64;i++)
+ eeprom_ram[i]=0xffff;
+ }
+ jerry_ee_state=EE_STATE_BUSY;
+ break;
+ }
+ case EE_STATE_0_0_3:{
+ // writes enable
+ //fprintf(log_get(),"eeprom: read/write\n");
+ jerry_writes_enabled=1;
+ jerry_ee_state=EE_STATE_START;
+ break;
+ }
+ case EE_STATE_1: {
+ jerry_ee_rstate=EE_STATE_1_0;
+ jerry_ee_state=EE_READ_ADDRESS;
+ jerry_ee_address_cnt=6;
+ jerry_ee_address_data=0;
+ jerry_ee_direct_jump=1;
+ break;
+ }
+ case EE_STATE_1_0: {
+ jerry_ee_rstate=EE_STATE_1_1;
+ jerry_ee_state=EE_READ_DATA;
+ jerry_ee_data_cnt=16;
+ jerry_ee_data=0;
+ jerry_ee_direct_jump=1;
+ break;
+ }
+ case EE_STATE_1_1: {
+ //fprintf(log_get(),"eeprom: writing 0x%.4x at 0x%.2x\n",jerry_ee_data,jerry_ee_address_data);
+ if (jerry_writes_enabled)
+ eeprom_ram[jerry_ee_address_data]=jerry_ee_data;
+ jerry_ee_state=EE_STATE_BUSY;
+ break;
+ }
+ case EE_STATE_2: {
+ jerry_ee_rstate=EE_STATE_2_0;
+ jerry_ee_state=EE_READ_ADDRESS;
+ jerry_ee_address_cnt=6;
+ jerry_ee_address_data=0;
+ jerry_ee_data_cnt=16;
+ jerry_ee_data=0;
+ break;
+ }
+ case EE_STATE_3: {
+ jerry_ee_rstate=EE_STATE_3_0;
+ jerry_ee_state=EE_READ_ADDRESS;
+ jerry_ee_address_cnt=6;
+ jerry_ee_address_data=0;
+ jerry_ee_direct_jump=1;
+ break;
+ }
+ case EE_STATE_3_0: {
+ //fprintf(log_get(),"eeprom: erasing 0x%.2x\n",jerry_ee_address_data);
+ if (jerry_writes_enabled)
+ eeprom_ram[jerry_ee_address_data]=0xffff;
+ jerry_ee_state=EE_STATE_BUSY;
+ break;
+ }
+ case EE_READ_DATA:
+ {
+ //fprintf(log_get(),"eeprom:\t\t\t%i bit %i\n",data,jerry_ee_data_cnt-1);
+ jerry_ee_data<<=1;
+ jerry_ee_data|=data;
+ jerry_ee_data_cnt--;
+ if (!jerry_ee_data_cnt)
+ {
+ jerry_ee_state=jerry_ee_rstate;
+ if (jerry_ee_direct_jump)
+ eeprom_set_di(data);
+ }
+ break;
+ }
+ case EE_READ_ADDRESS:
+ {
+ jerry_ee_address_data<<=1;
+ jerry_ee_address_data|=data;
+ jerry_ee_address_cnt--;
+// fprintf(log_get(),"eeprom:\t%i bits remaining\n",jerry_ee_address_cnt);
+ if (!jerry_ee_address_cnt)
+ {
+ jerry_ee_state=jerry_ee_rstate;
+ //fprintf(log_get(),"eeprom:\t\tread address 0x%.2x\n",jerry_ee_address_data);
+ if (jerry_ee_direct_jump)
+ eeprom_set_di(data);
+ }
+ break;
+ }
+ default: {
+ jerry_ee_state=EE_STATE_OP_A;
+ break;
+ }
+
+ }
+}
+//////////////////////////////////////////////////////////////////////////////
+//
+//////////////////////////////////////////////////////////////////////////////
+//
+//
+//
+//
+//
+//
+//////////////////////////////////////////////////////////////////////////////
+void eeprom_set_cs(uint32 state)
+{
+// fprintf(log_get(),"eeprom: cs=%i\n",state);
+ jerry_ee_state=EE_STATE_START;
+ jerry_ee_op=0;
+ jerry_ee_rstate=0;
+ jerry_ee_address_data=0;
+ jerry_ee_address_cnt=6;
+ jerry_ee_data=0;
+ jerry_ee_data_cnt=16;
+ jerry_writes_enabled=1;
+}
+//////////////////////////////////////////////////////////////////////////////
+//
+//////////////////////////////////////////////////////////////////////////////
+//
+//
+//
+//
+//
+//
+//////////////////////////////////////////////////////////////////////////////
+uint32 eeprom_get_do(void)
+{
+ uint16 data=1;
+ switch (jerry_ee_state)
+ {
+ case EE_STATE_START: {
+ data=1;
+ break;
+ }
+ case EE_STATE_BUSY: {
+ jerry_ee_state=EE_STATE_START;
+ data=0;
+ break;
+ }
+ case EE_STATE_2_0: {
+ jerry_ee_data_cnt--;
+ data=((eeprom_ram[jerry_ee_address_data]&(1<<jerry_ee_data_cnt))>>jerry_ee_data_cnt);
+ if (!jerry_ee_data_cnt)
+ {
+ //fprintf(log_get(),"eeprom: read 0x%.4x at 0x%.2x cpu %i pc=0x%.8x\n",eeprom_ram[jerry_ee_address_data],jerry_ee_address_data,jaguar_cpu_in_exec,s68000readPC());
+ jerry_ee_state=EE_STATE_START;
+ }
+ break;
+ }
+ }
+// fprintf(log_get(),"eeprom: do=%i\n",data);
+ return(data);
+}
projects / virtualjaguar / blobdiff