litedram/test/reference/ddr3_init.h

#ifndef __GENERATED_SDRAM_PHY_H
#define __GENERATED_SDRAM_PHY_H

#include <hw/common.h>
#include <generated/csr.h>

#define DFII_CONTROL_SEL 0x01
#define DFII_CONTROL_CKE 0x02
#define DFII_CONTROL_ODT 0x04
#define DFII_CONTROL_RESET_N 0x08

#define DFII_COMMAND_CS 0x01
#define DFII_COMMAND_WE 0x02
#define DFII_COMMAND_CAS 0x04
#define DFII_COMMAND_RAS 0x08
#define DFII_COMMAND_WRDATA 0x10
#define DFII_COMMAND_RDDATA 0x20

#define SDRAM_PHY_K7DDRPHY
#define SDRAM_PHY_XDR 2
#define SDRAM_PHY_DATABITS 64
#define SDRAM_PHY_DFI_DATABITS 128
#define SDRAM_PHY_PHASES 4
#define SDRAM_PHY_CL 7
#define SDRAM_PHY_CWL 6
#define SDRAM_PHY_CMD_LATENCY 0
#define SDRAM_PHY_RDPHASE 1
#define SDRAM_PHY_WRPHASE 2
#define SDRAM_PHY_WRITE_LEVELING_CAPABLE
#define SDRAM_PHY_WRITE_LATENCY_CALIBRATION_CAPABLE
#define SDRAM_PHY_WRITE_DQ_DQS_TRAINING_CAPABLE
#define SDRAM_PHY_READ_LEVELING_CAPABLE
#define SDRAM_PHY_DQ_DQS_RATIO 8
#define SDRAM_PHY_MODULES 8
#define SDRAM_PHY_DELAYS 32
#define SDRAM_PHY_BITSLIPS 8
#define SDRAM_PHY_DDR3
#define SDRAM_PHY_SUPPORTED_MEMORY 0x0000000040000000ULL

void cdelay(int i);

__attribute__((unused)) static inline void command_p0(int cmd)
{
	sdram_dfii_pi0_command_write(cmd);
	sdram_dfii_pi0_command_issue_write(1);
}
__attribute__((unused)) static inline void command_p1(int cmd)
{
	sdram_dfii_pi1_command_write(cmd);
	sdram_dfii_pi1_command_issue_write(1);
}
__attribute__((unused)) static inline void command_p2(int cmd)
{
	sdram_dfii_pi2_command_write(cmd);
	sdram_dfii_pi2_command_issue_write(1);
}
__attribute__((unused)) static inline void command_p3(int cmd)
{
	sdram_dfii_pi3_command_write(cmd);
	sdram_dfii_pi3_command_issue_write(1);
}

#define DFII_PIX_DATA_SIZE CSR_SDRAM_DFII_PI0_WRDATA_SIZE

static inline unsigned long sdram_dfii_pix_wrdata_addr(int phase)
{
	switch (phase) {
		case 0: return CSR_SDRAM_DFII_PI0_WRDATA_ADDR;
		case 1: return CSR_SDRAM_DFII_PI1_WRDATA_ADDR;
		case 2: return CSR_SDRAM_DFII_PI2_WRDATA_ADDR;
		case 3: return CSR_SDRAM_DFII_PI3_WRDATA_ADDR;
		default: return 0;
	}
}
static inline unsigned long sdram_dfii_pix_rddata_addr(int phase)
{
	switch (phase) {
		case 0: return CSR_SDRAM_DFII_PI0_RDDATA_ADDR;
		case 1: return CSR_SDRAM_DFII_PI1_RDDATA_ADDR;
		case 2: return CSR_SDRAM_DFII_PI2_RDDATA_ADDR;
		case 3: return CSR_SDRAM_DFII_PI3_RDDATA_ADDR;
		default: return 0;
	}
}

#define DDRX_MR_WRLVL_ADDRESS 1
#define DDRX_MR_WRLVL_RESET 6
#define DDRX_MR_WRLVL_BIT 7

static inline void init_sequence(void)
{
	/* Release reset */
	sdram_dfii_pi0_address_write(0x0);
	sdram_dfii_pi0_baddress_write(0);
	sdram_dfii_control_write(DFII_CONTROL_ODT|DFII_CONTROL_RESET_N);
	cdelay(50000);

	/* Bring CKE high */
	sdram_dfii_pi0_address_write(0x0);
	sdram_dfii_pi0_baddress_write(0);
	sdram_dfii_control_write(DFII_CONTROL_CKE|DFII_CONTROL_ODT|DFII_CONTROL_RESET_N);
	cdelay(10000);

	/* Load Mode Register 2, CWL=6 */
	sdram_dfii_pi0_address_write(0x208);
	sdram_dfii_pi0_baddress_write(2);
	command_p0(DFII_COMMAND_RAS|DFII_COMMAND_CAS|DFII_COMMAND_WE|DFII_COMMAND_CS);

	/* Load Mode Register 3 */
	sdram_dfii_pi0_address_write(0x0);
	sdram_dfii_pi0_baddress_write(3);
	command_p0(DFII_COMMAND_RAS|DFII_COMMAND_CAS|DFII_COMMAND_WE|DFII_COMMAND_CS);

	/* Load Mode Register 1 */
	sdram_dfii_pi0_address_write(0x6);
	sdram_dfii_pi0_baddress_write(1);
	command_p0(DFII_COMMAND_RAS|DFII_COMMAND_CAS|DFII_COMMAND_WE|DFII_COMMAND_CS);

	/* Load Mode Register 0, CL=7, BL=8 */
	sdram_dfii_pi0_address_write(0x930);
	sdram_dfii_pi0_baddress_write(0);
	command_p0(DFII_COMMAND_RAS|DFII_COMMAND_CAS|DFII_COMMAND_WE|DFII_COMMAND_CS);
	cdelay(200);

	/* ZQ Calibration */
	sdram_dfii_pi0_address_write(0x400);
	sdram_dfii_pi0_baddress_write(0);
	command_p0(DFII_COMMAND_WE|DFII_COMMAND_CS);
	cdelay(200);

}

#endif /* __GENERATED_SDRAM_PHY_H */