add seeprom support to miniios

Makefile

@@ -12,7 +12,7 @@ TARGET = iosboot.bin
 ELF = iosboot.elf
 OBJECTS = start.o main.o ipc.o vsprintf.o string.o gecko.o memory.o memory_asm.o \
 	utils_asm.o utils.o ff.o diskio.o sdhc.o powerpc_elf.o powerpc.o panic.o irq.o irq_asm.o \
-	exception.o exception_asm.o crypto.o nand.o
+	exception.o exception_asm.o seeprom.o crypto.o nand.o
 
 $(TARGET) : $(ELF) $(ELFLOADER) 
 	@echo  "MAKEBIN	$@"

crypto.c

@@ -6,12 +6,13 @@
 #include "ipc.h"
 #include "gecko.h"
 #include "string.h"
-
+#include "seeprom.h"
 
 #define		AES_CMD_RESET	0
 #define		AES_CMD_DECRYPT	0x9800
 
 otp_t otp;
+seeprom_t seeprom;
 
 void crypto_read_otp(void)
 {
@@ -23,10 +24,15 @@ void crypto_read_otp(void)
 	}
 }
 
+void crypto_read_seeprom(void)
+{
+  seeprom_read(&seeprom, 0, sizeof(seeprom) / 2);
+}
 
 void crypto_initialize()
 {
 	crypto_read_otp();
+	crypto_read_seeprom();
 	write32(AES_CMD, 0);
 	while (read32(AES_CMD) != 0);
 	irq_enable(IRQ_AES);
@@ -40,6 +46,10 @@ void crypto_ipc(volatile ipc_request *req)
 			memcpy((void *)req->args[0], &otp, sizeof(otp));
 			dc_flushrange((void *)req->args[0], sizeof(otp));
 			break;
+		case IPC_KEYS_GETEEP:
+			memcpy((void *)req->args[0], &seeprom, sizeof(seeprom));
+			dc_flushrange((void *)req->args[0], sizeof(seeprom));
+			break;
 		default:
 			gecko_printf("IPC: unknown SLOW CRYPTO request %04x\n",
 					req->req);

seeprom.c

@@ -0,0 +1,64 @@
+#include "types.h"
+#include "utils.h"
+#include "hollywood.h"
+#include "start.h"
+
+#define gpio_delay() udelay(100)
+
+
+void send_bits(int b, int bits)
+{
+	while(bits--)
+	{
+		if(b & (1 << bits))
+			set32(HW_GPIO1OUT, 0x1000);
+		else
+			clear32(HW_GPIO1OUT, 0x1000);
+		gpio_delay();
+		set32(HW_GPIO1OUT, 0x800);
+		gpio_delay();
+		clear32(HW_GPIO1OUT, 0x800);
+		gpio_delay();
+	}
+}
+
+int recv_bits(int bits)
+{
+	int res = 0;
+	while(bits--)
+	{
+		res <<= 1;
+		set32(HW_GPIO1OUT, 0x800);
+		gpio_delay();
+		clear32(HW_GPIO1OUT, 0x800);
+		gpio_delay();
+		res |= !!(read32(HW_GPIO1IN) & 0x2000);
+	}
+	return res;
+}
+
+int seeprom_read(void *dst, int offset, int size)
+{
+	int i;
+	u16 *ptr = (u16 *)dst;
+	u16 recv;
+
+	if(size & 1)
+		return -1;
+
+	clear32(HW_GPIO1OUT, 0x800);
+	clear32(HW_GPIO1OUT, 0x400);	
+	gpio_delay();
+
+	for(i = 0; i < size; ++i)
+	{
+		set32(HW_GPIO1OUT, 0x400);
+		send_bits((0x600 | (offset + i)), 11);
+		recv = recv_bits(16);
+		*ptr++ = recv;
+		clear32(HW_GPIO1OUT, 0x400);
+		gpio_delay();
+	}
+
+	return size;
+}

seeprom.h

@@ -0,0 +1,6 @@
+#ifndef __SEEPROM_H__
+#define	__SEEPROM_H__	1
+
+int seeprom_read(void *dst, int offset, int size);
+
+#endif