#define RC0 ((1<<0)<<8)
#define RC1 ((1<<1)<<8)
#define RC2 ((1<<2)<<8)
#define RC3 ((1<<3)<<8)

#define DIMM0 0xa0
#define DIMM1 0xa2
#define DIMM2 0xa4
#define DIMM3 0xa8


static inline void activate_spd_rom(const struct mem_controller *ctrl)
{
	/* dummy */
}


/* 
 * This function is dedicated to Daniele Frijia <realcosmo@spd-online.de>
 */

static int spd_read_byte(unsigned device, unsigned address)
{
	static const unsigned char infinion_512mb_pc2700[0x80] = {
		0x80, 0x08, 0x07, 0x0d, 0x0b, 0x01, 0x48, 0x00,
		0x04, 0x60, 0x70, 0x02, 0x82, 0x04, 0x04, 0x01,
		0x0e, 0x04, 0x0c, 0x01, 0x02, 0x26, 0xc0, 0x75,
		0x70, 0x00, 0x00, 0x48, 0x30, 0x48, 0x2a, 0x80,
		0x75, 0x75, 0x45, 0x45, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x3c, 0x48, 0x30, 0x28, 0x50, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x47,
		0xc1, 0x49, 0x4e, 0x46, 0x49, 0x4e, 0x45, 0x4f,
		0x53, 0x37, 0x32, 0x44, 0x36, 0x34, 0x33, 0x30,
		0x30, 0x47, 0x42, 0x52, 0x36, 0x42, 0x20, 0x20,
		0x20, 0x20, 0x20, 0x02, 0x0a, 0x03, 0x21, 0x0d,
		0x3d, 0x89, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
	};

	if (address >= 0x80)
		return -1;

	/* This code is AMD quartet specific. 
	 * DIMM0 and DIMM1 are defines of the original smbus device 
	 * numbers on the quartet. We read them here to see which 
	 * spd rom we should fake. 
	 * Below construct assumes that the first two dimm sockets
	 * of each cpu hold a 512MB Infinion PC2700 CL2.5 ECC registered
	 * ddr ram module.
	 */

	device &= 0xff;
	if (device == DIMM0 || device == DIMM1) {
		return infinion_512mb_pc2700[address];
	}

	return -1;
}