mirror of
https://github.com/holub/mame
synced 2025-10-07 17:27:06 +03:00
Remove old eeprom implementation.
This commit is contained in:
Aaron Giles
parent
532e2fca96
commit
ccc24c02f1
2
.gitattributes
vendored
2
.gitattributes
vendored
@ -650,8 +650,6 @@ src/emu/machine/ds2401.c svneol=native#text/plain
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src/emu/machine/ds2401.h svneol=native#text/plain
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src/emu/machine/ds2404.c svneol=native#text/plain
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src/emu/machine/ds2404.h svneol=native#text/plain
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src/emu/machine/eeprom.c svneol=native#text/plain
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src/emu/machine/eeprom.h svneol=native#text/plain
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src/emu/machine/eepromdev.c svneol=native#text/plain
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src/emu/machine/eepromdev.h svneol=native#text/plain
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src/emu/machine/f3853.c svneol=native#text/plain
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@ -132,7 +132,6 @@ EMUMACHINEOBJS = \
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$(EMUMACHINE)/ds1302.o \
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$(EMUMACHINE)/ds2401.o \
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$(EMUMACHINE)/ds2404.o \
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$(EMUMACHINE)/eeprom.o \
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$(EMUMACHINE)/eepromdev.o \
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$(EMUMACHINE)/f3853.o \
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$(EMUMACHINE)/generic.o \
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@ -1,376 +0,0 @@
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#include "driver.h"
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#include "eeprom.h"
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#define VERBOSE 0
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#define LOG(x) do { if (VERBOSE) logerror x; } while (0)
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#define SERIAL_BUFFER_LENGTH 40
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#define MEMORY_SIZE 1024
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static const eeprom_interface *intf;
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static int serial_count;
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static UINT8 serial_buffer[SERIAL_BUFFER_LENGTH];
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static UINT8 eeprom_data[MEMORY_SIZE];
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static int eeprom_data_bits;
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static int eeprom_read_address;
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static int eeprom_clock_count;
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static int latch,reset_line,clock_line,sending;
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static int locked;
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static int reset_delay;
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/*
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eeprom_command_match:
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Try to match the first (len) digits in the EEPROM serial buffer
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string (*buf) with an EEPROM command string (*cmd).
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Return non zero if a match was found.
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The serial buffer only contains '0' or '1' (e.g. "1001").
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The command can contain: '0' or '1' or these wildcards:
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'x' : match both '0' and '1'
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"*1": match "1", "01", "001", "0001" etc.
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"*0": match "0", "10", "110", "1110" etc.
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Note: (cmd) may be NULL. Return 0 (no match) in this case.
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*/
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static int eeprom_command_match(const char *buf, const char *cmd, int len)
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{
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if ( cmd == 0 ) return 0;
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if ( len == 0 ) return 0;
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for (;len>0;)
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{
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char b = *buf;
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char c = *cmd;
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if ((b==0) || (c==0))
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return (b==c);
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switch ( c )
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{
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case '0':
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case '1':
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if (b != c) return 0;
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case 'X':
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case 'x':
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buf++;
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len--;
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cmd++;
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break;
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case '*':
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c = cmd[1];
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switch( c )
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{
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case '0':
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case '1':
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if (b == c) { cmd++; }
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else { buf++; len--; }
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break;
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default: return 0;
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}
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}
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}
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return (*cmd==0);
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}
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const eeprom_interface eeprom_interface_93C46 =
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{
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6, // address bits 6
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16, // data bits 16
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"*110", // read 1 10 aaaaaa
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"*101", // write 1 01 aaaaaa dddddddddddddddd
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"*111", // erase 1 11 aaaaaa
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"*10000xxxx", // lock 1 00 00xxxx
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"*10011xxxx", // unlock 1 00 11xxxx
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1,
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// "*10001xxxx" // write all 1 00 01xxxx dddddddddddddddd
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// "*10010xxxx" // erase all 1 00 10xxxx
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};
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const eeprom_interface eeprom_interface_93C66B =
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{
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8, /* address bits */
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16, /* data bits */
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"*110", /* read command */
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"*101", /* write command */
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"*111", /* erase command */
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"*10000xxxxxx", /* lock command */
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"*10011xxxxxx", /* unlock command */
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1,
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// "*10001xxxxxx", /* write all */
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// "*10010xxxxxx", /* erase all */
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};
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NVRAM_HANDLER( 93C46 )
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{
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if (read_or_write)
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eeprom_save(file);
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else
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{
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eeprom_init(machine, &eeprom_interface_93C46);
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if (file) eeprom_load(file);
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}
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}
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NVRAM_HANDLER( 93C66B )
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{
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if (read_or_write)
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eeprom_save(file);
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else
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{
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eeprom_init(machine, &eeprom_interface_93C66B);
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if (file) eeprom_load(file);
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}
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}
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void eeprom_init(running_machine *machine, const eeprom_interface *interface)
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{
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intf = interface;
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if ((1 << intf->address_bits) * intf->data_bits / 8 > MEMORY_SIZE)
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{
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fatalerror("EEPROM larger than eeprom.c allows");
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}
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memset(eeprom_data,0xff,(1 << intf->address_bits) * intf->data_bits / 8);
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serial_count = 0;
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latch = 0;
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reset_line = ASSERT_LINE;
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clock_line = ASSERT_LINE;
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eeprom_read_address = 0;
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sending = 0;
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if (intf->cmd_unlock) locked = 1;
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else locked = 0;
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state_save_register_global_array(machine, eeprom_data);
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state_save_register_global_array(machine, serial_buffer);
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state_save_register_global(machine, clock_line);
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state_save_register_global(machine, reset_line);
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state_save_register_global(machine, locked);
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state_save_register_global(machine, serial_count);
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state_save_register_global(machine, latch);
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state_save_register_global(machine, reset_delay);
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state_save_register_global(machine, eeprom_clock_count);
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state_save_register_global(machine, eeprom_data_bits);
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state_save_register_global(machine, eeprom_read_address);
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}
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static void eeprom_write(int bit)
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{
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LOG(("EEPROM write bit %d\n",bit));
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if (serial_count >= SERIAL_BUFFER_LENGTH-1)
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{
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logerror("error: EEPROM serial buffer overflow\n");
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return;
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}
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serial_buffer[serial_count++] = (bit ? '1' : '0');
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serial_buffer[serial_count] = 0; /* nul terminate so we can treat it as a string */
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if ( (serial_count > intf->address_bits) &&
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eeprom_command_match((char*)serial_buffer,intf->cmd_read,strlen((char*)serial_buffer)-intf->address_bits) )
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{
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int i,address;
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address = 0;
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for (i = serial_count-intf->address_bits;i < serial_count;i++)
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{
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address <<= 1;
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if (serial_buffer[i] == '1') address |= 1;
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}
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if (intf->data_bits == 16)
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eeprom_data_bits = (eeprom_data[2*address+0] << 8) + eeprom_data[2*address+1];
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else
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eeprom_data_bits = eeprom_data[address];
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eeprom_read_address = address;
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eeprom_clock_count = 0;
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sending = 1;
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serial_count = 0;
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logerror("EEPROM read %04x from address %02x\n",eeprom_data_bits,address);
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}
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else if ( (serial_count > intf->address_bits) &&
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eeprom_command_match((char*)serial_buffer,intf->cmd_erase,strlen((char*)serial_buffer)-intf->address_bits) )
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{
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int i,address;
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address = 0;
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for (i = serial_count-intf->address_bits;i < serial_count;i++)
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{
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address <<= 1;
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if (serial_buffer[i] == '1') address |= 1;
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}
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logerror("EEPROM erase address %02x\n",address);
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if (locked == 0)
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{
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if (intf->data_bits == 16)
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{
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eeprom_data[2*address+0] = 0xff;
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eeprom_data[2*address+1] = 0xff;
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}
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else
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eeprom_data[address] = 0xff;
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}
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else
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logerror("Error: EEPROM is locked\n");
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serial_count = 0;
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}
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else if ( (serial_count > (intf->address_bits + intf->data_bits)) &&
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eeprom_command_match((char*)serial_buffer,intf->cmd_write,strlen((char*)serial_buffer)-(intf->address_bits + intf->data_bits)) )
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{
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int i,address,data;
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address = 0;
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for (i = serial_count-intf->data_bits-intf->address_bits;i < (serial_count-intf->data_bits);i++)
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{
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address <<= 1;
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if (serial_buffer[i] == '1') address |= 1;
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}
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data = 0;
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for (i = serial_count-intf->data_bits;i < serial_count;i++)
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{
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data <<= 1;
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if (serial_buffer[i] == '1') data |= 1;
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}
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logerror("EEPROM write %04x to address %02x\n",data,address);
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if (locked == 0)
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{
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if (intf->data_bits == 16)
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{
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eeprom_data[2*address+0] = data >> 8;
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eeprom_data[2*address+1] = data & 0xff;
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}
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else
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eeprom_data[address] = data;
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}
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else
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logerror("Error: EEPROM is locked\n");
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serial_count = 0;
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}
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else if ( eeprom_command_match((char*)serial_buffer,intf->cmd_lock,strlen((char*)serial_buffer)) )
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{
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logerror("EEPROM lock\n");
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locked = 1;
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serial_count = 0;
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}
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else if ( eeprom_command_match((char*)serial_buffer,intf->cmd_unlock,strlen((char*)serial_buffer)) )
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{
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logerror("EEPROM unlock\n");
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locked = 0;
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serial_count = 0;
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}
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}
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static void eeprom_reset(void)
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{
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if (serial_count)
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logerror("EEPROM reset, buffer = %s\n",serial_buffer);
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serial_count = 0;
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sending = 0;
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reset_delay = intf->reset_delay; /* delay a little before returning setting data to 1 (needed by wbeachvl) */
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}
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void eeprom_write_bit(int bit)
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{
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LOG(("write bit %d\n",bit));
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latch = bit;
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}
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int eeprom_read_bit(void)
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{
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int res;
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if (sending)
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res = (eeprom_data_bits >> intf->data_bits) & 1;
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else
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{
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if (reset_delay > 0)
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{
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/* this is needed by wbeachvl */
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reset_delay--;
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res = 0;
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}
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else
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res = 1;
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}
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LOG(("read bit %d\n",res));
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return res;
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}
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CUSTOM_INPUT( eeprom_bit_r )
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{
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return eeprom_read_bit();
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}
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void eeprom_set_cs_line(int state)
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{
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LOG(("set reset line %d\n",state));
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reset_line = state;
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if (reset_line != CLEAR_LINE)
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eeprom_reset();
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}
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void eeprom_set_clock_line(int state)
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{
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LOG(("set clock line %d\n",state));
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if (state == PULSE_LINE || (clock_line == CLEAR_LINE && state != CLEAR_LINE))
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{
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if (reset_line == CLEAR_LINE)
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{
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if (sending)
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{
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if (eeprom_clock_count == intf->data_bits && intf->enable_multi_read)
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{
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eeprom_read_address = (eeprom_read_address + 1) & ((1 << intf->address_bits) - 1);
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if (intf->data_bits == 16)
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eeprom_data_bits = (eeprom_data[2*eeprom_read_address+0] << 8) + eeprom_data[2*eeprom_read_address+1];
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else
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eeprom_data_bits = eeprom_data[eeprom_read_address];
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eeprom_clock_count = 0;
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logerror("EEPROM read %04x from address %02x\n",eeprom_data_bits,eeprom_read_address);
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}
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eeprom_data_bits = (eeprom_data_bits << 1) | 1;
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eeprom_clock_count++;
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}
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else
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eeprom_write(latch);
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}
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}
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clock_line = state;
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}
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void eeprom_load(mame_file *f)
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{
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mame_fread(f,eeprom_data,(1 << intf->address_bits) * intf->data_bits / 8);
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}
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void eeprom_save(mame_file *f)
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{
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mame_fwrite(f,eeprom_data,(1 << intf->address_bits) * intf->data_bits / 8);
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}
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void eeprom_set_data(const UINT8 *data, int length)
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{
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memcpy(eeprom_data, data, length);
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}
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void *eeprom_get_data_pointer(UINT32 *length, UINT32 *size)
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{
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if (length != NULL && intf != NULL)
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*length = 1 << intf->address_bits;
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if (size != NULL && intf != NULL)
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*size = intf->data_bits / 8;
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return eeprom_data;
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}
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@ -1,42 +0,0 @@
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#ifndef eeprom_H
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#define eeprom_H
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typedef struct _eeprom_interface eeprom_interface;
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struct _eeprom_interface
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{
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int address_bits; /* EEPROM has 2^address_bits cells */
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int data_bits; /* every cell has this many bits (8 or 16) */
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const char *cmd_read; /* read command string, e.g. "0110" */
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const char *cmd_write; /* write command string, e.g. "0111" */
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const char *cmd_erase; /* erase command string, or 0 if n/a */
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const char *cmd_lock; /* lock command string, or 0 if n/a */
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const char *cmd_unlock; /* unlock command string, or 0 if n/a */
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int enable_multi_read;/* set to 1 to enable multiple values to be read from one read command */
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int reset_delay; /* number of times eeprom_read_bit() should return 0 after a reset, */
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/* before starting to return 1. */
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};
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void eeprom_init(running_machine *machine, const eeprom_interface *interface);
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void eeprom_write_bit(int bit);
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int eeprom_read_bit(void);
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CUSTOM_INPUT( eeprom_bit_r );
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void eeprom_set_cs_line(int state);
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void eeprom_set_clock_line(int state);
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void eeprom_load(mame_file *file);
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void eeprom_save(mame_file *file);
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void eeprom_set_data(const UINT8 *data, int length);
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void *eeprom_get_data_pointer(UINT32 *length, UINT32 *size);
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/* 93C46 */
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extern const eeprom_interface eeprom_interface_93C46;
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NVRAM_HANDLER( 93C46 );
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/* 93C66B */
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extern const eeprom_interface eeprom_interface_93C66B;
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NVRAM_HANDLER( 93C66B );
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#endif
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