spl.c
4.07 KB
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
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2012 Atmel Corporation
* Copyright (C) 2019 Stefan Roese <sr@denx.de>
*/
#include <common.h>
#include <nand.h>
#include <spl.h>
#include <asm/arch/at91sam9x5_matrix.h>
#include <asm/arch/at91sam9_smc.h>
#include <asm/arch/atmel_mpddrc.h>
#include <asm/arch/clk.h>
#include <asm/arch/gpio.h>
static void at91sam9x5ek_nand_hw_init(void)
{
struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
unsigned long csa;
/* Enable CS3 */
csa = readl(&matrix->ebicsa);
csa |= AT91_MATRIX_EBI_CS3A_SMC_SMARTMEDIA;
/* NAND flash on D16 */
csa |= AT91_MATRIX_NFD0_ON_D16;
/* Configure IO drive */
csa &= ~AT91_MATRIX_EBI_EBI_IOSR_NORMAL;
writel(csa, &matrix->ebicsa);
/* Configure SMC CS3 for NAND/SmartMedia */
writel(AT91_SMC_SETUP_NWE(1) | AT91_SMC_SETUP_NCS_WR(0) |
AT91_SMC_SETUP_NRD(1) | AT91_SMC_SETUP_NCS_RD(0),
&smc->cs[3].setup);
writel(AT91_SMC_PULSE_NWE(3) | AT91_SMC_PULSE_NCS_WR(5) |
AT91_SMC_PULSE_NRD(4) | AT91_SMC_PULSE_NCS_RD(6),
&smc->cs[3].pulse);
writel(AT91_SMC_CYCLE_NWE(5) | AT91_SMC_CYCLE_NRD(6),
&smc->cs[3].cycle);
writel(AT91_SMC_MODE_RM_NRD | AT91_SMC_MODE_WM_NWE |
AT91_SMC_MODE_EXNW_DISABLE |
#ifdef CONFIG_SYS_NAND_DBW_16
AT91_SMC_MODE_DBW_16 |
#else /* CONFIG_SYS_NAND_DBW_8 */
AT91_SMC_MODE_DBW_8 |
#endif
AT91_SMC_MODE_TDF_CYCLE(1),
&smc->cs[3].mode);
at91_periph_clk_enable(ATMEL_ID_PIOCD);
/* Configure RDY/BSY */
at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1);
/* Enable NandFlash */
at91_set_gpio_output(CONFIG_SYS_NAND_ENABLE_PIN, 1);
at91_pio3_set_a_periph(AT91_PIO_PORTD, 0, 1); /* NAND OE */
at91_pio3_set_a_periph(AT91_PIO_PORTD, 1, 1); /* NAND WE */
at91_pio3_set_a_periph(AT91_PIO_PORTD, 2, 1); /* NAND ALE */
at91_pio3_set_a_periph(AT91_PIO_PORTD, 3, 1); /* NAND CLE */
at91_pio3_set_a_periph(AT91_PIO_PORTD, 6, 1);
at91_pio3_set_a_periph(AT91_PIO_PORTD, 7, 1);
at91_pio3_set_a_periph(AT91_PIO_PORTD, 8, 1);
at91_pio3_set_a_periph(AT91_PIO_PORTD, 9, 1);
at91_pio3_set_a_periph(AT91_PIO_PORTD, 10, 1);
at91_pio3_set_a_periph(AT91_PIO_PORTD, 11, 1);
at91_pio3_set_a_periph(AT91_PIO_PORTD, 12, 1);
at91_pio3_set_a_periph(AT91_PIO_PORTD, 13, 1);
}
void at91_spl_board_init(void)
{
at91sam9x5ek_nand_hw_init();
}
static void ddr2_conf(struct atmel_mpddrc_config *ddr2)
{
ddr2->md = (ATMEL_MPDDRC_MD_DBW_16_BITS | ATMEL_MPDDRC_MD_DDR2_SDRAM);
ddr2->cr = (ATMEL_MPDDRC_CR_NC_COL_10 |
ATMEL_MPDDRC_CR_NR_ROW_13 |
ATMEL_MPDDRC_CR_CAS_DDR_CAS3 |
ATMEL_MPDDRC_CR_NB_8BANKS |
ATMEL_MPDDRC_CR_DECOD_INTERLEAVED);
ddr2->rtr = 0x411;
ddr2->tpr0 = (6 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET |
2 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET |
2 << ATMEL_MPDDRC_TPR0_TWR_OFFSET |
8 << ATMEL_MPDDRC_TPR0_TRC_OFFSET |
2 << ATMEL_MPDDRC_TPR0_TRP_OFFSET |
2 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET |
2 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET |
2 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET);
ddr2->tpr1 = (2 << ATMEL_MPDDRC_TPR1_TXP_OFFSET |
200 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET |
19 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET |
18 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET);
ddr2->tpr2 = (7 << ATMEL_MPDDRC_TPR2_TFAW_OFFSET |
2 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET |
3 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET |
7 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET |
2 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET);
}
void mem_init(void)
{
struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
struct atmel_mpddrc_config ddr2;
unsigned long csa;
ddr2_conf(&ddr2);
/* Enable DDR2 clock */
writel(AT91_PMC_DDR, &pmc->scer);
/* Chip select 1 is for DDR2/SDRAM */
csa = readl(&matrix->ebicsa);
csa |= AT91_MATRIX_EBI_CS1A_SDRAMC;
csa &= ~AT91_MATRIX_EBI_DBPU_OFF;
csa |= AT91_MATRIX_EBI_DBPD_OFF;
csa |= AT91_MATRIX_EBI_EBI_IOSR_NORMAL;
writel(csa, &matrix->ebicsa);
/* DDRAM2 Controller initialize */
ddr2_init(ATMEL_BASE_DDRSDRC, ATMEL_BASE_CS1, &ddr2);
}