1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * XEA iMX28 board
4 *
5 * Copyright (C) 2019 DENX Software Engineering
6 * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
7 *
8 * Copyright (C) 2018 DENX Software Engineering
9 * Måns Rullgård, DENX Software Engineering, mans@mansr.com
10 *
11 * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
12 * on behalf of DENX Software Engineering GmbH
13 *
14 */
15
16 #include <common.h>
17 #include <fdt_support.h>
18 #include <init.h>
19 #include <log.h>
20 #include <net.h>
21 #include <asm/global_data.h>
22 #include <asm/gpio.h>
23 #include <asm/io.h>
24 #include <asm/arch/imx-regs.h>
25 #include <asm/arch/iomux-mx28.h>
26 #include <asm/arch/clock.h>
27 #include <asm/arch/sys_proto.h>
28 #include <linux/delay.h>
29 #include <linux/mii.h>
30 #include <miiphy.h>
31 #include <netdev.h>
32 #include <errno.h>
33 #include <usb.h>
34 #include <serial.h>
35
36 #ifdef CONFIG_SPL_BUILD
37 #include <spl.h>
38 #endif
39
40 DECLARE_GLOBAL_DATA_PTR;
41
42 /*
43 * Functions
44 */
45
init_clocks(void)46 static void init_clocks(void)
47 {
48 /* IO0 clock at 480MHz */
49 mxs_set_ioclk(MXC_IOCLK0, 480000);
50 /* IO1 clock at 480MHz */
51 mxs_set_ioclk(MXC_IOCLK1, 480000);
52
53 /* SSP0 clock at 96MHz */
54 mxs_set_sspclk(MXC_SSPCLK0, 96000, 0);
55 /* SSP2 clock at 160MHz */
56 mxs_set_sspclk(MXC_SSPCLK2, 160000, 0);
57 /* SSP3 clock at 96MHz */
58 mxs_set_sspclk(MXC_SSPCLK3, 96000, 0);
59 }
60
61 #ifdef CONFIG_SPL_BUILD
board_init_f(ulong arg)62 void board_init_f(ulong arg)
63 {
64 init_clocks();
65 preloader_console_init();
66 }
67
68 static int boot_tiva0, boot_tiva1;
69
70 /* Check if TIVAs request booting via U-Boot proper */
spl_board_init(void)71 void spl_board_init(void)
72 {
73 struct gpio_desc btiva0, btiva1, en_3_3v;
74 int ret;
75
76 /*
77 * Setup GPIO0_0 (TIVA power enable pin) to be output high
78 * to allow TIVA startup.
79 */
80 ret = dm_gpio_lookup_name("GPIO0_0", &en_3_3v);
81 if (ret)
82 printf("Cannot get GPIO0_0\n");
83
84 ret = dm_gpio_request(&en_3_3v, "pwr_3_3v");
85 if (ret)
86 printf("Cannot request GPIO0_0\n");
87
88 /* Set GPIO0_0 to HIGH */
89 dm_gpio_set_dir_flags(&en_3_3v, GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
90
91 ret = dm_gpio_lookup_name("GPIO0_23", &btiva0);
92 if (ret)
93 printf("Cannot get GPIO0_23\n");
94
95 ret = dm_gpio_lookup_name("GPIO0_25", &btiva1);
96 if (ret)
97 printf("Cannot get GPIO0_25\n");
98
99 ret = dm_gpio_request(&btiva0, "boot-tiva0");
100 if (ret)
101 printf("Cannot request GPIO0_23\n");
102
103 ret = dm_gpio_request(&btiva1, "boot-tiva1");
104 if (ret)
105 printf("Cannot request GPIO0_25\n");
106
107 dm_gpio_set_dir_flags(&btiva0, GPIOD_IS_IN);
108 dm_gpio_set_dir_flags(&btiva1, GPIOD_IS_IN);
109
110 udelay(1000);
111
112 boot_tiva0 = dm_gpio_get_value(&btiva0);
113 boot_tiva1 = dm_gpio_get_value(&btiva1);
114 }
115
board_boot_order(u32 * spl_boot_list)116 void board_boot_order(u32 *spl_boot_list)
117 {
118 spl_boot_list[0] = BOOT_DEVICE_MMC1;
119 spl_boot_list[1] = BOOT_DEVICE_SPI;
120 spl_boot_list[2] = BOOT_DEVICE_UART;
121 }
122
spl_start_uboot(void)123 int spl_start_uboot(void)
124 {
125 /* break into full u-boot on 'c' */
126 if (serial_tstc() && serial_getc() == 'c')
127 return 1;
128
129 debug("%s: btiva0: %d btiva1: %d\n", __func__, boot_tiva0, boot_tiva1);
130 return !boot_tiva0 || !boot_tiva1;
131 }
132 #else
133
board_early_init_f(void)134 int board_early_init_f(void)
135 {
136 init_clocks();
137
138 return 0;
139 }
140
board_init(void)141 int board_init(void)
142 {
143 struct gpio_desc phy_rst;
144 int ret;
145
146 /* Address of boot parameters */
147 gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
148
149 cpu_eth_init(NULL);
150
151 /* PHY INT#/PWDN# */
152 ret = dm_gpio_lookup_name("GPIO4_13", &phy_rst);
153 if (ret) {
154 printf("Cannot get GPIO4_13\n");
155 return ret;
156 }
157
158 ret = dm_gpio_request(&phy_rst, "phy-rst");
159 if (ret) {
160 printf("Cannot request GPIO4_13\n");
161 return ret;
162 }
163
164 dm_gpio_set_dir_flags(&phy_rst, GPIOD_IS_IN);
165 udelay(1000);
166
167 return 0;
168 }
169
dram_init(void)170 int dram_init(void)
171 {
172 return mxs_dram_init();
173 }
174
175 #ifdef CONFIG_OF_BOARD_SETUP
fdt_fixup_l2switch(void * blob)176 static int fdt_fixup_l2switch(void *blob)
177 {
178 u8 ethaddr[6];
179 int ret;
180
181 if (eth_env_get_enetaddr("ethaddr", ethaddr)) {
182 ret = fdt_find_and_setprop(blob,
183 "/ahb@80080000/switch@800f0000",
184 "local-mac-address", ethaddr, 6, 1);
185 if (ret < 0)
186 printf("%s: can't find usbether@1 node: %d\n",
187 __func__, ret);
188 }
189
190 return 0;
191 }
192
ft_board_setup(void * blob,struct bd_info * bd)193 int ft_board_setup(void *blob, struct bd_info *bd)
194 {
195 /*
196 * i.MX28 L2 switch needs manual update (fixup) of eth MAC address
197 * (in 'local-mac-address' property) as it uses "switch@800f0000"
198 * node, not set by default FIT image handling code in
199 * "ethernet@800f0000"
200 */
201 fdt_fixup_l2switch(blob);
202
203 return 0;
204 }
205 #endif
206
207 #endif /* CONFIG_SPL_BUILD */
208