1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2016 Freescale Semiconductor, Inc.
*/
/*
* Generic driver for Freescale MMDC(Multi Mode DDR Controller).
*/
#include <common.h>
#include <fsl_mmdc.h>
#include <asm/io.h>
#include <linux/delay.h>
static void set_wait_for_bits_clear(void *ptr, u32 value, u32 bits)
{
int timeout = 1000;
out_be32(ptr, value);
while (in_be32(ptr) & bits) {
udelay(100);
timeout--;
}
if (timeout <= 0)
printf("Error: %p wait for clear timeout.\n", ptr);
}
void mmdc_init(const struct fsl_mmdc_info *priv)
{
struct mmdc_regs *mmdc = (struct mmdc_regs *)CFG_SYS_FSL_DDR_ADDR;
unsigned int tmp;
/* 1. set configuration request */
out_be32(&mmdc->mdscr, MDSCR_ENABLE_CON_REQ);
/* 2. configure the desired timing parameters */
out_be32(&mmdc->mdotc, priv->mdotc);
out_be32(&mmdc->mdcfg0, priv->mdcfg0);
out_be32(&mmdc->mdcfg1, priv->mdcfg1);
out_be32(&mmdc->mdcfg2, priv->mdcfg2);
/* 3. configure DDR type and other miscellaneous parameters */
out_be32(&mmdc->mdmisc, priv->mdmisc);
out_be32(&mmdc->mpmur0, MMDC_MPMUR0_FRC_MSR);
out_be32(&mmdc->mdrwd, priv->mdrwd);
out_be32(&mmdc->mpodtctrl, priv->mpodtctrl);
/* 4. configure the required delay while leaving reset */
out_be32(&mmdc->mdor, priv->mdor);
/* 5. configure DDR physical parameters */
/* set row/column address width, burst length, data bus width */
tmp = priv->mdctl & ~(MDCTL_SDE0 | MDCTL_SDE1);
out_be32(&mmdc->mdctl, tmp);
/* configure address space partition */
out_be32(&mmdc->mdasp, priv->mdasp);
/* 6. perform a ZQ calibration - not needed here, doing in #8b */
/* 7. enable MMDC with the desired chip select */
#if (CONFIG_CHIP_SELECTS_PER_CTRL == 1)
out_be32(&mmdc->mdctl, tmp | MDCTL_SDE0);
#elif (CONFIG_CHIP_SELECTS_PER_CTRL == 2)
out_be32(&mmdc->mdctl, tmp | MDCTL_SDE0 | MDCTL_SDE1);
#endif
/* 8a. dram init sequence: update MRs for ZQ, ODT, PRE, etc */
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(8) | MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_2);
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(0) | MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_3);
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(4) | MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_1);
out_be32(&mmdc->mdscr, CMD_ADDR_MSB_MR_OP(0x19) |
CMD_ADDR_LSB_MR_ADDR(0x30) |
MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_0);
/* 8b. ZQ calibration */
out_be32(&mmdc->mdscr, CMD_ADDR_MSB_MR_OP(0x4) | MDSCR_ENABLE_CON_REQ |
CMD_ZQ_CALIBRATION | CMD_BANK_ADDR_0);
set_wait_for_bits_clear(&mmdc->mpzqhwctrl, priv->mpzqhwctrl,
MPZQHWCTRL_ZQ_HW_FORCE);
/* 9a. calibrations now, wr lvl */
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(0x84) |
MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_1);
out_be32(&mmdc->mdscr, MDSCR_ENABLE_CON_REQ | MDSCR_WL_EN |
CMD_NORMAL);
set_wait_for_bits_clear(&mmdc->mpwlgcr, MPWLGCR_HW_WL_EN,
MPWLGCR_HW_WL_EN);
mdelay(1);
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(4) | MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_1);
out_be32(&mmdc->mdscr, MDSCR_ENABLE_CON_REQ);
mdelay(1);
/* 9b. read DQS gating calibration */
out_be32(&mmdc->mdscr, CMD_ADDR_MSB_MR_OP(4) | MDSCR_ENABLE_CON_REQ |
CMD_PRECHARGE_BANK_OPEN | CMD_BANK_ADDR_0);
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(4) | MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_3);
out_be32(&mmdc->mppdcmpr2, MPPDCMPR2_MPR_COMPARE_EN);
/* set absolute read delay offset */
if (priv->mprddlctl)
out_be32(&mmdc->mprddlctl, priv->mprddlctl);
else
out_be32(&mmdc->mprddlctl, MMDC_MPRDDLCTL_DEFAULT_DELAY);
set_wait_for_bits_clear(&mmdc->mpdgctrl0,
AUTO_RD_DQS_GATING_CALIBRATION_EN,
AUTO_RD_DQS_GATING_CALIBRATION_EN);
out_be32(&mmdc->mdscr, MDSCR_ENABLE_CON_REQ | CMD_LOAD_MODE_REG |
CMD_BANK_ADDR_3);
/* 9c. read calibration */
out_be32(&mmdc->mdscr, CMD_ADDR_MSB_MR_OP(4) | MDSCR_ENABLE_CON_REQ |
CMD_PRECHARGE_BANK_OPEN | CMD_BANK_ADDR_0);
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(4) | MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_3);
out_be32(&mmdc->mppdcmpr2, MPPDCMPR2_MPR_COMPARE_EN);
set_wait_for_bits_clear(&mmdc->mprddlhwctl,
MPRDDLHWCTL_AUTO_RD_CALIBRATION_EN,
MPRDDLHWCTL_AUTO_RD_CALIBRATION_EN);
out_be32(&mmdc->mdscr, MDSCR_ENABLE_CON_REQ | CMD_LOAD_MODE_REG |
CMD_BANK_ADDR_3);
/* 10. configure power-down, self-refresh entry, exit parameters */
out_be32(&mmdc->mdpdc, priv->mdpdc);
out_be32(&mmdc->mapsr, MMDC_MAPSR_PWR_SAV_CTRL_STAT);
/* 11. ZQ config again? do nothing here */
/* 12. refresh scheme */
set_wait_for_bits_clear(&mmdc->mdref, priv->mdref,
MDREF_START_REFRESH);
/* 13. disable CON_REQ */
out_be32(&mmdc->mdscr, MDSCR_DISABLE_CFG_REQ);
}
|