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/*
* (c) 2015 Purna Chandra Mandal <purna.mandal@microchip.com>
*
* SPDX-License-Identifier: GPL-2.0+
*
*/
#ifndef __MICROCHIP_DDR2_TIMING_H
#define __MICROCHIP_DDR2_TIMING_H
/* MPLL freq is 400MHz */
#define T_CK 2500 /* 2500 psec */
#define T_CK_CTRL (T_CK * 2)
/* Burst length in cycles */
#define BL 2
/* default CAS latency for all speed grades */
#define RL 5
/* default write latency for all speed grades = CL-1 */
#define WL 4
/* From Micron MT47H64M16HR-3 data sheet */
#define T_RFC_MIN 127500 /* psec */
#define T_WR 15000 /* psec */
#define T_RP 12500 /* psec */
#define T_RCD 12500 /* psec */
#define T_RRD 7500 /* psec */
/* T_RRD_TCK is minimum of 2 clk periods, regardless of freq */
#define T_RRD_TCK 2
#define T_WTR 7500 /* psec */
/* T_WTR_TCK is minimum of 2 clk periods, regardless of freq */
#define T_WTR_TCK 2
#define T_RTP 7500 /* psec */
#define T_RTP_TCK (BL / 2)
#define T_XP_TCK 2 /* clocks */
#define T_CKE_TCK 3 /* clocks */
#define T_XSNR (T_RFC_MIN + 10000) /* psec */
#define T_DLLK 200 /* clocks */
#define T_RAS_MIN 45000 /* psec */
#define T_RC 57500 /* psec */
#define T_FAW 35000 /* psec */
#define T_MRD_TCK 2 /* clocks */
#define T_RFI 7800000 /* psec */
/* DDR Addressing */
#define COL_BITS 10
#define BA_BITS 3
#define ROW_BITS 13
#define CS_BITS 1
/* DDR Addressing scheme: {CS, ROW, BA, COL} */
#define COL_HI_RSHFT 0
#define COL_HI_MASK 0
#define COL_LO_MASK ((1 << COL_BITS) - 1)
#define BA_RSHFT COL_BITS
#define BA_MASK ((1 << BA_BITS) - 1)
#define ROW_ADDR_RSHIFT (BA_RSHFT + BA_BITS)
#define ROW_ADDR_MASK ((1 << ROW_BITS) - 1)
#define CS_ADDR_RSHIFT 0
#define CS_ADDR_MASK 0
#endif /* __MICROCHIP_DDR2_TIMING_H */
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