arm: at91: Add gardena-gateway-at91sam support
[oweals/u-boot.git] / board / gardena / smart-gateway-at91sam / spl.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2012 Atmel Corporation
4  * Copyright (C) 2019 Stefan Roese <sr@denx.de>
5  */
6
7 #include <common.h>
8 #include <nand.h>
9 #include <spl.h>
10 #include <asm/arch/at91sam9x5_matrix.h>
11 #include <asm/arch/at91sam9_smc.h>
12 #include <asm/arch/atmel_mpddrc.h>
13 #include <asm/arch/clk.h>
14 #include <asm/arch/gpio.h>
15
16 static void at91sam9x5ek_nand_hw_init(void)
17 {
18         struct at91_smc *smc = (struct at91_smc *)ATMEL_BASE_SMC;
19         struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
20         unsigned long csa;
21
22         /* Enable CS3 */
23         csa = readl(&matrix->ebicsa);
24         csa |= AT91_MATRIX_EBI_CS3A_SMC_SMARTMEDIA;
25
26         /* NAND flash on D16 */
27         csa |= AT91_MATRIX_NFD0_ON_D16;
28
29         /* Configure IO drive */
30         csa &= ~AT91_MATRIX_EBI_EBI_IOSR_NORMAL;
31
32         writel(csa, &matrix->ebicsa);
33
34         /* Configure SMC CS3 for NAND/SmartMedia */
35         writel(AT91_SMC_SETUP_NWE(1) | AT91_SMC_SETUP_NCS_WR(0) |
36                AT91_SMC_SETUP_NRD(1) | AT91_SMC_SETUP_NCS_RD(0),
37                &smc->cs[3].setup);
38         writel(AT91_SMC_PULSE_NWE(3) | AT91_SMC_PULSE_NCS_WR(5) |
39                AT91_SMC_PULSE_NRD(4) | AT91_SMC_PULSE_NCS_RD(6),
40                &smc->cs[3].pulse);
41         writel(AT91_SMC_CYCLE_NWE(5) | AT91_SMC_CYCLE_NRD(6),
42                &smc->cs[3].cycle);
43         writel(AT91_SMC_MODE_RM_NRD | AT91_SMC_MODE_WM_NWE |
44                AT91_SMC_MODE_EXNW_DISABLE |
45 #ifdef CONFIG_SYS_NAND_DBW_16
46                AT91_SMC_MODE_DBW_16 |
47 #else /* CONFIG_SYS_NAND_DBW_8 */
48                AT91_SMC_MODE_DBW_8 |
49 #endif
50                AT91_SMC_MODE_TDF_CYCLE(1),
51                &smc->cs[3].mode);
52
53         at91_periph_clk_enable(ATMEL_ID_PIOCD);
54
55         /* Configure RDY/BSY */
56         at91_set_gpio_input(CONFIG_SYS_NAND_READY_PIN, 1);
57
58         /* Enable NandFlash */
59         at91_set_gpio_output(CONFIG_SYS_NAND_ENABLE_PIN, 1);
60
61         at91_pio3_set_a_periph(AT91_PIO_PORTD, 0, 1);   /* NAND OE */
62         at91_pio3_set_a_periph(AT91_PIO_PORTD, 1, 1);   /* NAND WE */
63         at91_pio3_set_a_periph(AT91_PIO_PORTD, 2, 1);   /* NAND ALE */
64         at91_pio3_set_a_periph(AT91_PIO_PORTD, 3, 1);   /* NAND CLE */
65         at91_pio3_set_a_periph(AT91_PIO_PORTD, 6, 1);
66         at91_pio3_set_a_periph(AT91_PIO_PORTD, 7, 1);
67         at91_pio3_set_a_periph(AT91_PIO_PORTD, 8, 1);
68         at91_pio3_set_a_periph(AT91_PIO_PORTD, 9, 1);
69         at91_pio3_set_a_periph(AT91_PIO_PORTD, 10, 1);
70         at91_pio3_set_a_periph(AT91_PIO_PORTD, 11, 1);
71         at91_pio3_set_a_periph(AT91_PIO_PORTD, 12, 1);
72         at91_pio3_set_a_periph(AT91_PIO_PORTD, 13, 1);
73 }
74
75 void at91_spl_board_init(void)
76 {
77         at91sam9x5ek_nand_hw_init();
78 }
79
80 static void ddr2_conf(struct atmel_mpddrc_config *ddr2)
81 {
82         ddr2->md = (ATMEL_MPDDRC_MD_DBW_16_BITS | ATMEL_MPDDRC_MD_DDR2_SDRAM);
83
84         ddr2->cr = (ATMEL_MPDDRC_CR_NC_COL_10 |
85                     ATMEL_MPDDRC_CR_NR_ROW_13 |
86                     ATMEL_MPDDRC_CR_CAS_DDR_CAS3 |
87                     ATMEL_MPDDRC_CR_NB_8BANKS |
88                     ATMEL_MPDDRC_CR_DECOD_INTERLEAVED);
89
90         ddr2->rtr = 0x411;
91
92         ddr2->tpr0 = (6 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET |
93                       2 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET |
94                       2 << ATMEL_MPDDRC_TPR0_TWR_OFFSET |
95                       8 << ATMEL_MPDDRC_TPR0_TRC_OFFSET |
96                       2 << ATMEL_MPDDRC_TPR0_TRP_OFFSET |
97                       2 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET |
98                       2 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET |
99                       2 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET);
100
101         ddr2->tpr1 = (2 << ATMEL_MPDDRC_TPR1_TXP_OFFSET |
102                       200 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET |
103                       19 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET |
104                       18 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET);
105
106         ddr2->tpr2 = (7 << ATMEL_MPDDRC_TPR2_TFAW_OFFSET |
107                       2 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET |
108                       3 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET |
109                       7 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET |
110                       2 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET);
111 }
112
113 void mem_init(void)
114 {
115         struct at91_matrix *matrix = (struct at91_matrix *)ATMEL_BASE_MATRIX;
116         struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
117         struct atmel_mpddrc_config ddr2;
118         unsigned long csa;
119
120         ddr2_conf(&ddr2);
121
122         /* Enable DDR2 clock */
123         writel(AT91_PMC_DDR, &pmc->scer);
124
125         /* Chip select 1 is for DDR2/SDRAM */
126         csa = readl(&matrix->ebicsa);
127         csa |= AT91_MATRIX_EBI_CS1A_SDRAMC;
128         csa &= ~AT91_MATRIX_EBI_DBPU_OFF;
129         csa |= AT91_MATRIX_EBI_DBPD_OFF;
130         csa |= AT91_MATRIX_EBI_EBI_IOSR_NORMAL;
131         writel(csa, &matrix->ebicsa);
132
133         /* DDRAM2 Controller initialize */
134         ddr2_init(ATMEL_BASE_DDRSDRC, ATMEL_BASE_CS1, &ddr2);
135 }