1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Header file for the Atmel DDR/SDR SDRAM Controller
4 *
5 * Copyright (C) 2010 Atmel Corporation
6 * Nicolas Ferre <nicolas.ferre@atmel.com>
7 */
8#ifndef AT91SAM9_DDRSDR_H
9#define AT91SAM9_DDRSDR_H
10
11#define AT91_DDRSDRC_MR 0x00 /* Mode Register */
12#define AT91_DDRSDRC_MODE (0x7 << 0) /* Command Mode */
13#define AT91_DDRSDRC_MODE_NORMAL 0
14#define AT91_DDRSDRC_MODE_NOP 1
15#define AT91_DDRSDRC_MODE_PRECHARGE 2
16#define AT91_DDRSDRC_MODE_LMR 3
17#define AT91_DDRSDRC_MODE_REFRESH 4
18#define AT91_DDRSDRC_MODE_EXT_LMR 5
19#define AT91_DDRSDRC_MODE_DEEP 6
20
21#define AT91_DDRSDRC_RTR 0x04 /* Refresh Timer Register */
22#define AT91_DDRSDRC_COUNT (0xfff << 0) /* Refresh Timer Counter */
23
24#define AT91_DDRSDRC_CR 0x08 /* Configuration Register */
25#define AT91_DDRSDRC_NC (3 << 0) /* Number of Column Bits */
26#define AT91_DDRSDRC_NC_SDR8 (0 << 0)
27#define AT91_DDRSDRC_NC_SDR9 (1 << 0)
28#define AT91_DDRSDRC_NC_SDR10 (2 << 0)
29#define AT91_DDRSDRC_NC_SDR11 (3 << 0)
30#define AT91_DDRSDRC_NC_DDR9 (0 << 0)
31#define AT91_DDRSDRC_NC_DDR10 (1 << 0)
32#define AT91_DDRSDRC_NC_DDR11 (2 << 0)
33#define AT91_DDRSDRC_NC_DDR12 (3 << 0)
34#define AT91_DDRSDRC_NR (3 << 2) /* Number of Row Bits */
35#define AT91_DDRSDRC_NR_11 (0 << 2)
36#define AT91_DDRSDRC_NR_12 (1 << 2)
37#define AT91_DDRSDRC_NR_13 (2 << 2)
38#define AT91_DDRSDRC_NR_14 (3 << 2)
39#define AT91_DDRSDRC_CAS (7 << 4) /* CAS Latency */
40#define AT91_DDRSDRC_CAS_2 (2 << 4)
41#define AT91_DDRSDRC_CAS_3 (3 << 4)
42#define AT91_DDRSDRC_CAS_25 (6 << 4)
43#define AT91_DDRSDRC_RST_DLL (1 << 7) /* Reset DLL */
44#define AT91_DDRSDRC_DICDS (1 << 8) /* Output impedance control */
45#define AT91_DDRSDRC_DIS_DLL (1 << 9) /* Disable DLL [SAM9 Only] */
46#define AT91_DDRSDRC_OCD (1 << 12) /* Off-Chip Driver [SAM9 Only] */
47#define AT91_DDRSDRC_DQMS (1 << 16) /* Mask Data is Shared [SAM9 Only] */
48#define AT91_DDRSDRC_ACTBST (1 << 18) /* Active Bank X to Burst Stop Read Access Bank Y [SAM9 Only] */
49
50#define AT91_DDRSDRC_T0PR 0x0C /* Timing 0 Register */
51#define AT91_DDRSDRC_TRAS (0xf << 0) /* Active to Precharge delay */
52#define AT91_DDRSDRC_TRCD (0xf << 4) /* Row to Column delay */
53#define AT91_DDRSDRC_TWR (0xf << 8) /* Write recovery delay */
54#define AT91_DDRSDRC_TRC (0xf << 12) /* Row cycle delay */
55#define AT91_DDRSDRC_TRP (0xf << 16) /* Row precharge delay */
56#define AT91_DDRSDRC_TRRD (0xf << 20) /* Active BankA to BankB */
57#define AT91_DDRSDRC_TWTR (0x7 << 24) /* Internal Write to Read delay */
58#define AT91_DDRSDRC_RED_WRRD (0x1 << 27) /* Reduce Write to Read Delay [SAM9 Only] */
59#define AT91_DDRSDRC_TMRD (0xf << 28) /* Load mode to active/refresh delay */
60
61#define AT91_DDRSDRC_T1PR 0x10 /* Timing 1 Register */
62#define AT91_DDRSDRC_TRFC (0x1f << 0) /* Row Cycle Delay */
63#define AT91_DDRSDRC_TXSNR (0xff << 8) /* Exit self-refresh to non-read */
64#define AT91_DDRSDRC_TXSRD (0xff << 16) /* Exit self-refresh to read */
65#define AT91_DDRSDRC_TXP (0xf << 24) /* Exit power-down delay */
66
67#define AT91_DDRSDRC_T2PR 0x14 /* Timing 2 Register [SAM9 Only] */
68#define AT91_DDRSDRC_TXARD (0xf << 0) /* Exit active power down delay to read command in mode "Fast Exit" */
69#define AT91_DDRSDRC_TXARDS (0xf << 4) /* Exit active power down delay to read command in mode "Slow Exit" */
70#define AT91_DDRSDRC_TRPA (0xf << 8) /* Row Precharge All delay */
71#define AT91_DDRSDRC_TRTP (0x7 << 12) /* Read to Precharge delay */
72
73#define AT91_DDRSDRC_LPR 0x1C /* Low Power Register */
74#define AT91_DDRSDRC_LPCB (3 << 0) /* Low-power Configurations */
75#define AT91_DDRSDRC_LPCB_DISABLE 0
76#define AT91_DDRSDRC_LPCB_SELF_REFRESH 1
77#define AT91_DDRSDRC_LPCB_POWER_DOWN 2
78#define AT91_DDRSDRC_LPCB_DEEP_POWER_DOWN 3
79#define AT91_DDRSDRC_CLKFR (1 << 2) /* Clock Frozen */
80#define AT91_DDRSDRC_LPDDR2_PWOFF (1 << 3) /* LPDDR Power Off */
81#define AT91_DDRSDRC_PASR (7 << 4) /* Partial Array Self Refresh */
82#define AT91_DDRSDRC_TCSR (3 << 8) /* Temperature Compensated Self Refresh */
83#define AT91_DDRSDRC_DS (3 << 10) /* Drive Strength */
84#define AT91_DDRSDRC_TIMEOUT (3 << 12) /* Time to define when Low Power Mode is enabled */
85#define AT91_DDRSDRC_TIMEOUT_0_CLK_CYCLES (0 << 12)
86#define AT91_DDRSDRC_TIMEOUT_64_CLK_CYCLES (1 << 12)
87#define AT91_DDRSDRC_TIMEOUT_128_CLK_CYCLES (2 << 12)
88#define AT91_DDRSDRC_APDE (1 << 16) /* Active power down exit time */
89#define AT91_DDRSDRC_UPD_MR (3 << 20) /* Update load mode register and extended mode register */
90
91#define AT91_DDRSDRC_MDR 0x20 /* Memory Device Register */
92#define AT91_DDRSDRC_MD (7 << 0) /* Memory Device Type */
93#define AT91_DDRSDRC_MD_SDR 0
94#define AT91_DDRSDRC_MD_LOW_POWER_SDR 1
95#define AT91_DDRSDRC_MD_LOW_POWER_DDR 3
96#define AT91_DDRSDRC_MD_LPDDR3 5
97#define AT91_DDRSDRC_MD_DDR2 6 /* [SAM9 Only] */
98#define AT91_DDRSDRC_MD_LPDDR2 7
99#define AT91_DDRSDRC_DBW (1 << 4) /* Data Bus Width */
100#define AT91_DDRSDRC_DBW_32BITS (0 << 4)
101#define AT91_DDRSDRC_DBW_16BITS (1 << 4)
102
103#define AT91_DDRSDRC_DLL 0x24 /* DLL Information Register */
104#define AT91_DDRSDRC_MDINC (1 << 0) /* Master Delay increment */
105#define AT91_DDRSDRC_MDDEC (1 << 1) /* Master Delay decrement */
106#define AT91_DDRSDRC_MDOVF (1 << 2) /* Master Delay Overflow */
107#define AT91_DDRSDRC_MDVAL (0xff << 8) /* Master Delay value */
108
109#define AT91_DDRSDRC_HS 0x2C /* High Speed Register [SAM9 Only] */
110#define AT91_DDRSDRC_DIS_ATCP_RD (1 << 2) /* Anticip read access is disabled */
111
112#define AT91_DDRSDRC_DELAY(n) (0x30 + (0x4 * (n))) /* Delay I/O Register n */
113
114#define AT91_DDRSDRC_WPMR 0xE4 /* Write Protect Mode Register [SAM9 Only] */
115#define AT91_DDRSDRC_WP (1 << 0) /* Write protect enable */
116#define AT91_DDRSDRC_WPKEY (0xffffff << 8) /* Write protect key */
117#define AT91_DDRSDRC_KEY (0x444452 << 8) /* Write protect key = "DDR" */
118
119#define AT91_DDRSDRC_WPSR 0xE8 /* Write Protect Status Register [SAM9 Only] */
120#define AT91_DDRSDRC_WPVS (1 << 0) /* Write protect violation status */
121#define AT91_DDRSDRC_WPVSRC (0xffff << 8) /* Write protect violation source */
122
123#endif
124

source code of linux/include/soc/at91/at91sam9_ddrsdr.h