[linux.git] / include / memory / jedec_ddr.h

/*
 * Definitions for DDR memories based on JEDEC specs
 *
 * Copyright (C) 2012 Texas Instruments, Inc.
 *
 * Aneesh V <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __LINUX_JEDEC_DDR_H
#define __LINUX_JEDEC_DDR_H

#include <linux/types.h>

/* DDR Densities */
#define DDR_DENSITY_64Mb	1
#define DDR_DENSITY_128Mb	2
#define DDR_DENSITY_256Mb	3
#define DDR_DENSITY_512Mb	4
#define DDR_DENSITY_1Gb		5
#define DDR_DENSITY_2Gb		6
#define DDR_DENSITY_4Gb		7
#define DDR_DENSITY_8Gb		8
#define DDR_DENSITY_16Gb	9
#define DDR_DENSITY_32Gb	10

/* DDR type */
#define DDR_TYPE_DDR2		1
#define DDR_TYPE_DDR3		2
#define DDR_TYPE_LPDDR2_S4	3
#define DDR_TYPE_LPDDR2_S2	4
#define DDR_TYPE_LPDDR2_NVM	5

/* DDR IO width */
#define DDR_IO_WIDTH_4		1
#define DDR_IO_WIDTH_8		2
#define DDR_IO_WIDTH_16		3
#define DDR_IO_WIDTH_32		4

/* Number of Row bits */
#define R9			9
#define R10			10
#define R11			11
#define R12			12
#define R13			13
#define R14			14
#define R15			15
#define R16			16

/* Number of Column bits */
#define C7			7
#define C8			8
#define C9			9
#define C10			10
#define C11			11
#define C12			12

/* Number of Banks */
#define B1			0
#define B2			1
#define B4			2
#define B8			3

/* Refresh rate in nano-seconds */
#define T_REFI_15_6		15600
#define T_REFI_7_8		7800
#define T_REFI_3_9		3900

/* tRFC values */
#define T_RFC_90		90000
#define T_RFC_110		110000
#define T_RFC_130		130000
#define T_RFC_160		160000
#define T_RFC_210		210000
#define T_RFC_300		300000
#define T_RFC_350		350000

/* Mode register numbers */
#define DDR_MR0			0
#define DDR_MR1			1
#define DDR_MR2			2
#define DDR_MR3			3
#define DDR_MR4			4
#define DDR_MR5			5
#define DDR_MR6			6
#define DDR_MR7			7
#define DDR_MR8			8
#define DDR_MR9			9
#define DDR_MR10		10
#define DDR_MR11		11
#define DDR_MR16		16
#define DDR_MR17		17
#define DDR_MR18		18

/*
 * LPDDR2 related defines
 */

/* MR4 register fields */
#define MR4_SDRAM_REF_RATE_SHIFT			0
#define MR4_SDRAM_REF_RATE_MASK				7
#define MR4_TUF_SHIFT					7
#define MR4_TUF_MASK					(1 << 7)

/* MR4 SDRAM Refresh Rate field values */
#define SDRAM_TEMP_NOMINAL				0x3
#define SDRAM_TEMP_RESERVED_4				0x4
#define SDRAM_TEMP_HIGH_DERATE_REFRESH			0x5
#define SDRAM_TEMP_HIGH_DERATE_REFRESH_AND_TIMINGS	0x6
#define SDRAM_TEMP_VERY_HIGH_SHUTDOWN			0x7

#define NUM_DDR_ADDR_TABLE_ENTRIES			11
#define NUM_DDR_TIMING_TABLE_ENTRIES			4

/* Structure for DDR addressing info from the JEDEC spec */
struct lpddr2_addressing {
	u32 num_banks;
	u32 tREFI_ns;
	u32 tRFCab_ps;
};

/*
 * Structure for timings from the LPDDR2 datasheet
 * All parameters are in pico seconds(ps) unless explicitly indicated
 * with a suffix like tRAS_max_ns below
 */
struct lpddr2_timings {
	u32 max_freq;
	u32 min_freq;
	u32 tRPab;
	u32 tRCD;
	u32 tWR;
	u32 tRAS_min;
	u32 tRRD;
	u32 tWTR;
	u32 tXP;
	u32 tRTP;
	u32 tCKESR;
	u32 tDQSCK_max;
	u32 tDQSCK_max_derated;
	u32 tFAW;
	u32 tZQCS;
	u32 tZQCL;
	u32 tZQinit;
	u32 tRAS_max_ns;
};

/*
 * Min value for some parameters in terms of number of tCK cycles(nCK)
 * Please set to zero parameters that are not valid for a given memory
 * type
 */
struct lpddr2_min_tck {
	u32 tRPab;
	u32 tRCD;
	u32 tWR;
	u32 tRASmin;
	u32 tRRD;
	u32 tWTR;
	u32 tXP;
	u32 tRTP;
	u32 tCKE;
	u32 tCKESR;
	u32 tFAW;
};

extern const struct lpddr2_addressing
	lpddr2_jedec_addressing_table[NUM_DDR_ADDR_TABLE_ENTRIES];
extern const struct lpddr2_timings
	lpddr2_jedec_timings[NUM_DDR_TIMING_TABLE_ENTRIES];
extern const struct lpddr2_min_tck lpddr2_jedec_min_tck;

#endif /* __LINUX_JEDEC_DDR_H */
Commit	Line	Data
9c1c21a0 A	1	/*
	2	* Definitions for DDR memories based on JEDEC specs
	3	*
	4	* Copyright (C) 2012 Texas Instruments, Inc.
	5	*
	6	* Aneesh V <[email protected]>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12	#ifndef __LINUX_JEDEC_DDR_H
	13	#define __LINUX_JEDEC_DDR_H
	14
	15	#include <linux/types.h>
	16
	17	/* DDR Densities */
	18	#define DDR_DENSITY_64Mb 1
	19	#define DDR_DENSITY_128Mb 2
	20	#define DDR_DENSITY_256Mb 3
	21	#define DDR_DENSITY_512Mb 4
	22	#define DDR_DENSITY_1Gb 5
	23	#define DDR_DENSITY_2Gb 6
	24	#define DDR_DENSITY_4Gb 7
	25	#define DDR_DENSITY_8Gb 8
	26	#define DDR_DENSITY_16Gb 9
	27	#define DDR_DENSITY_32Gb 10
	28
	29	/* DDR type */
	30	#define DDR_TYPE_DDR2 1
	31	#define DDR_TYPE_DDR3 2
	32	#define DDR_TYPE_LPDDR2_S4 3
	33	#define DDR_TYPE_LPDDR2_S2 4
	34	#define DDR_TYPE_LPDDR2_NVM 5
	35
	36	/* DDR IO width */
	37	#define DDR_IO_WIDTH_4 1
	38	#define DDR_IO_WIDTH_8 2
	39	#define DDR_IO_WIDTH_16 3
	40	#define DDR_IO_WIDTH_32 4
	41
	42	/* Number of Row bits */
	43	#define R9 9
	44	#define R10 10
	45	#define R11 11
	46	#define R12 12
	47	#define R13 13
	48	#define R14 14
	49	#define R15 15
	50	#define R16 16
	51
	52	/* Number of Column bits */
	53	#define C7 7
	54	#define C8 8
	55	#define C9 9
	56	#define C10 10
	57	#define C11 11
	58	#define C12 12
	59
	60	/* Number of Banks */
	61	#define B1 0
	62	#define B2 1
	63	#define B4 2
	64	#define B8 3
65
66	/* Refresh rate in nano-seconds */
67	#define T_REFI_15_6 15600
68	#define T_REFI_7_8 7800
69	#define T_REFI_3_9 3900
70
71	/* tRFC values */
72	#define T_RFC_90 90000
73	#define T_RFC_110 110000
74	#define T_RFC_130 130000
75	#define T_RFC_160 160000
76	#define T_RFC_210 210000
77	#define T_RFC_300 300000
78	#define T_RFC_350 350000
79
80	/* Mode register numbers */
81	#define DDR_MR0 0
82	#define DDR_MR1 1
83	#define DDR_MR2 2
84	#define DDR_MR3 3
85	#define DDR_MR4 4
86	#define DDR_MR5 5
87	#define DDR_MR6 6
88	#define DDR_MR7 7
89	#define DDR_MR8 8
90	#define DDR_MR9 9
91	#define DDR_MR10 10
92	#define DDR_MR11 11
93	#define DDR_MR16 16
94	#define DDR_MR17 17
95	#define DDR_MR18 18
96
97	/*
98	* LPDDR2 related defines
99	*/
100
101	/* MR4 register fields */
102	#define MR4_SDRAM_REF_RATE_SHIFT 0
103	#define MR4_SDRAM_REF_RATE_MASK 7
104	#define MR4_TUF_SHIFT 7
105	#define MR4_TUF_MASK (1 << 7)
106
107	/* MR4 SDRAM Refresh Rate field values */
108	#define SDRAM_TEMP_NOMINAL 0x3
109	#define SDRAM_TEMP_RESERVED_4 0x4
110	#define SDRAM_TEMP_HIGH_DERATE_REFRESH 0x5
111	#define SDRAM_TEMP_HIGH_DERATE_REFRESH_AND_TIMINGS 0x6
112	#define SDRAM_TEMP_VERY_HIGH_SHUTDOWN 0x7
113
114	#define NUM_DDR_ADDR_TABLE_ENTRIES 11
115	#define NUM_DDR_TIMING_TABLE_ENTRIES 4
116
117	/* Structure for DDR addressing info from the JEDEC spec */
118	struct lpddr2_addressing {
119	u32 num_banks;
120	u32 tREFI_ns;
121	u32 tRFCab_ps;
122	};
123
124	/*
125	* Structure for timings from the LPDDR2 datasheet
126	* All parameters are in pico seconds(ps) unless explicitly indicated
127	* with a suffix like tRAS_max_ns below
128	*/
129	struct lpddr2_timings {
130	u32 max_freq;
131	u32 min_freq;
132	u32 tRPab;
133	u32 tRCD;
134	u32 tWR;
135	u32 tRAS_min;
136	u32 tRRD;
137	u32 tWTR;
138	u32 tXP;
139	u32 tRTP;
140	u32 tCKESR;
141	u32 tDQSCK_max;
142	u32 tDQSCK_max_derated;
143	u32 tFAW;
144	u32 tZQCS;
145	u32 tZQCL;
146	u32 tZQinit;
147	u32 tRAS_max_ns;
148	};
149
150	/*
151	* Min value for some parameters in terms of number of tCK cycles(nCK)
152	* Please set to zero parameters that are not valid for a given memory
153	* type
154	*/
155	struct lpddr2_min_tck {
156	u32 tRPab;
157	u32 tRCD;
158	u32 tWR;
159	u32 tRASmin;
160	u32 tRRD;
161	u32 tWTR;
162	u32 tXP;
163	u32 tRTP;
164	u32 tCKE;
165	u32 tCKESR;
166	u32 tFAW;
167	};
168
169	extern const struct lpddr2_addressing
170	lpddr2_jedec_addressing_table[NUM_DDR_ADDR_TABLE_ENTRIES];
171	extern const struct lpddr2_timings
172	lpddr2_jedec_timings[NUM_DDR_TIMING_TABLE_ENTRIES];
173	extern const struct lpddr2_min_tck lpddr2_jedec_min_tck;
174
175	#endif /* __LINUX_JEDEC_DDR_H */