ps2_memory_card: remove unused ecc, rename table

Author: xyzz

src/ps2/ps2_memory_card.c

@@ -178,7 +178,7 @@ static inline void __time_critical_func(mc_respond_slow)(uint8_t ch) {
     pio_sm_put_blocking(pio0, dat_writer_slow.sm, ch);
 }
 
-static uint8_t Table[] = {
+static uint8_t EccTable[] = {
 	0x00, 0x87, 0x96, 0x11, 0xa5, 0x22, 0x33, 0xb4,0xb4, 0x33, 0x22, 0xa5, 0x11, 0x96, 0x87, 0x00,
 	0xc3, 0x44, 0x55, 0xd2, 0x66, 0xe1, 0xf0, 0x77,0x77, 0xf0, 0xe1, 0x66, 0xd2, 0x55, 0x44, 0xc3,
 	0xd2, 0x55, 0x44, 0xc3, 0x77, 0xf0, 0xe1, 0x66,0x66, 0xe1, 0xf0, 0x77, 0xc3, 0x44, 0x55, 0xd2,
@@ -197,33 +197,6 @@ static uint8_t Table[] = {
 	0x00, 0x87, 0x96, 0x11, 0xa5, 0x22, 0x33, 0xb4,0xb4, 0x33, 0x22, 0xa5, 0x11, 0x96, 0x87, 0x00
 };
 
-void calcECC(uint8_t *ecc, const uint8_t *data)
-{
-	int i, c;
-
-	ecc[0] = ecc[1] = ecc[2] = 0;
-
-	for (i = 0 ; i < 0x80 ; i ++) {
-		c = Table[data[i]];
-
-		ecc[0] ^= c;
-		if (c & 0x80) {
-			ecc[1] ^= ~i;
-			ecc[2] ^= i;
-		}
-	}
-	ecc[0] = ~ecc[0];
-	ecc[0] &= 0x77;
-
-	ecc[1] = ~ecc[1];
-	ecc[1] &= 0x7f;
-
-	ecc[2] = ~ecc[2];
-	ecc[2] &= 0x7f;
-
-	return;
-}
-
 // keysource and key are self generated values
 uint8_t keysource[] = { 0xf5, 0x80, 0x95, 0x3c, 0x4c, 0x84, 0xa9, 0xc0 };
 uint8_t dex_key[16] = { 0x17, 0x39, 0xd3, 0xbc, 0xd0, 0x2c, 0x18, 0x07, 0x4b, 0x17, 0xf0, 0xea, 0xc4, 0x66, 0x30, 0xf9 };

src/ps2/ps2_memory_card.in.c

@@ -182,7 +182,7 @@ if (ch == 0x11) {
             send(b);
 
             if (readptr <= 512) {
-                uint8_t c = Table[b];
+                uint8_t c = EccTable[b];
                 eccptr[0] ^= c;
                 if (c & 0x80) {
                     eccptr[1] ^= ~(readptr & 0x7F);