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stm32f746: to switch on user LED1 & read user button
[u-boot] / board / st / stm32f746-disco / stm32f746-disco.c
1 /*
2  * (C) Copyright 2016
3  * Vikas Manocha, <vikas.manocha@st.com>
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <dm.h>
10 #include <ram.h>
11 #include <asm/io.h>
12 #include <asm/armv7m.h>
13 #include <asm/arch/stm32.h>
14 #include <asm/arch/gpio.h>
15 #include <dm/platdata.h>
16 #include <dm/platform_data/serial_stm32x7.h>
17 #include <asm/arch/stm32_periph.h>
18 #include <asm/arch/stm32_defs.h>
19 #include <asm/arch/syscfg.h>
20 #include <asm/gpio.h>
21
22 DECLARE_GLOBAL_DATA_PTR;
23
24 int dram_init(void)
25 {
26         struct udevice *dev;
27         struct ram_info ram;
28         int rv;
29
30         rv = uclass_get_device(UCLASS_RAM, 0, &dev);
31         if (rv) {
32                 debug("DRAM init failed: %d\n", rv);
33                 return rv;
34         }
35         rv = ram_get_info(dev, &ram);
36         if (rv) {
37                 debug("Cannot get DRAM size: %d\n", rv);
38                 return rv;
39         }
40         debug("SDRAM base=%lx, size=%x\n", ram.base, ram.size);
41         gd->ram_size = ram.size;
42
43         /*
44          * Fill in global info with description of SRAM configuration
45          */
46         gd->bd->bi_dram[0].start = CONFIG_SYS_RAM_BASE;
47         gd->bd->bi_dram[0].size  = ram.size;
48
49         return rv;
50 }
51
52 #ifdef CONFIG_ETH_DESIGNWARE
53 static int stmmac_setup(void)
54 {
55         clock_setup(SYSCFG_CLOCK_CFG);
56         /* Set >RMII mode */
57         STM32_SYSCFG->pmc |= SYSCFG_PMC_MII_RMII_SEL;
58         clock_setup(STMMAC_CLOCK_CFG);
59
60         return 0;
61 }
62
63 int board_early_init_f(void)
64 {
65         stmmac_setup();
66
67         return 0;
68 }
69 #endif
70
71 u32 get_board_rev(void)
72 {
73         return 0;
74 }
75
76 int board_late_init(void)
77 {
78         struct gpio_desc gpio = {};
79         int node;
80
81         node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "st,led1");
82         if (node < 0)
83                 return -1;
84
85         gpio_request_by_name_nodev(gd->fdt_blob, node, "led-gpio", 0, &gpio,
86                                    GPIOD_IS_OUT);
87
88         if (dm_gpio_is_valid(&gpio)) {
89                 dm_gpio_set_value(&gpio, 0);
90                 mdelay(10);
91                 dm_gpio_set_value(&gpio, 1);
92         }
93
94         /* read button 1*/
95         node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "st,button1");
96         if (node < 0)
97                 return -1;
98
99         gpio_request_by_name_nodev(gd->fdt_blob, node, "button-gpio", 0, &gpio,
100                                    GPIOD_IS_IN);
101
102         if (dm_gpio_is_valid(&gpio)) {
103                 if (dm_gpio_get_value(&gpio))
104                         puts("usr button is at HIGH LEVEL\n");
105                 else
106                         puts("usr button is at LOW LEVEL\n");
107         }
108
109         return 0;
110 }
111
112 int board_init(void)
113 {
114         gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
115
116         return 0;
117 }