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1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2018-2019 Toradex AG
4  */
5 #include <common.h>
6 #include <init.h>
7 #include <asm/global_data.h>
8 #include <linux/delay.h>
9
10 #include <asm/arch/clock.h>
11 #include <asm/arch/crm_regs.h>
12 #include <asm/arch/imx-regs.h>
13 #include <asm/arch-mx6/clock.h>
14 #include <asm/arch-mx6/imx-regs.h>
15 #include <asm/arch-mx6/mx6ull_pins.h>
16 #include <asm/arch/sys_proto.h>
17 #include <asm/gpio.h>
18 #include <asm/mach-imx/boot_mode.h>
19 #include <asm/mach-imx/iomux-v3.h>
20 #include <asm/io.h>
21 #include <dm.h>
22 #include <dm/platform_data/serial_mxc.h>
23 #include <env.h>
24 #include <fdt_support.h>
25 #include <imx_thermal.h>
26 #include <jffs2/load_kernel.h>
27 #include <linux/sizes.h>
28 #include <miiphy.h>
29 #include <mtd_node.h>
30 #include <netdev.h>
31
32 #include "../common/tdx-common.h"
33 #include "../common/tdx-cfg-block.h"
34
35 DECLARE_GLOBAL_DATA_PTR;
36
37 #define LCD_PAD_CTRL    (PAD_CTL_HYS | PAD_CTL_PUS_100K_UP | \
38                 PAD_CTL_DSE_48ohm)
39
40 #define MX6_PAD_SNVS_PMIC_STBY_REQ_ADDR 0x2290040
41
42 #define NAND_PAD_CTRL (PAD_CTL_DSE_48ohm | PAD_CTL_SRE_SLOW | PAD_CTL_HYS)
43
44 #define NAND_PAD_READY0_CTRL (PAD_CTL_DSE_48ohm | PAD_CTL_PUS_22K_UP)
45
46 #define FLASH_DETECTION_CTRL (PAD_CTL_HYS | PAD_CTL_PUE)
47 #define FLASH_DET_GPIO  IMX_GPIO_NR(4, 1)
48 static const iomux_v3_cfg_t flash_detection_pads[] = {
49         MX6_PAD_NAND_WE_B__GPIO4_IO01 | MUX_PAD_CTRL(FLASH_DETECTION_CTRL),
50 };
51
52 static bool is_emmc;
53
54 int dram_init(void)
55 {
56         gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
57
58         return 0;
59 }
60
61 #ifdef CONFIG_NAND_MXS
62 static void setup_gpmi_nand(void)
63 {
64         setup_gpmi_io_clk((MXC_CCM_CS2CDR_ENFC_CLK_PODF(0) |
65                            MXC_CCM_CS2CDR_ENFC_CLK_PRED(3) |
66                            MXC_CCM_CS2CDR_ENFC_CLK_SEL(3)));
67 }
68 #endif /* CONFIG_NAND_MXS */
69
70 #ifdef CONFIG_VIDEO
71 static const iomux_v3_cfg_t backlight_pads[] = {
72         /* Backlight On */
73         MX6_PAD_JTAG_TMS__GPIO1_IO11            | MUX_PAD_CTRL(NO_PAD_CTRL),
74         /* Backlight PWM<A> (multiplexed pin) */
75         MX6_PAD_NAND_WP_B__GPIO4_IO11           | MUX_PAD_CTRL(NO_PAD_CTRL),
76 };
77
78 #define GPIO_BL_ON IMX_GPIO_NR(1, 11)
79 #define GPIO_PWM_A IMX_GPIO_NR(4, 11)
80
81 static int setup_lcd(void)
82 {
83         imx_iomux_v3_setup_multiple_pads(backlight_pads, ARRAY_SIZE(backlight_pads));
84
85         /* Set BL_ON */
86         gpio_request(GPIO_BL_ON, "BL_ON");
87         gpio_direction_output(GPIO_BL_ON, 1);
88
89         /* Set PWM<A> to full brightness (assuming inversed polarity) */
90         gpio_request(GPIO_PWM_A, "PWM<A>");
91         gpio_direction_output(GPIO_PWM_A, 0);
92
93         return 0;
94 }
95 #endif
96
97 #ifdef CONFIG_FEC_MXC
98 static int setup_fec(void)
99 {
100         struct iomuxc *iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
101         int ret;
102
103         /*
104          * Use 50MHz anatop loopback REF_CLK2 for ENET2,
105          * clear gpr1[14], set gpr1[18].
106          */
107         clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC2_MASK,
108                         IOMUX_GPR1_FEC2_CLOCK_MUX1_SEL_MASK);
109
110         ret = enable_fec_anatop_clock(1, ENET_50MHZ);
111         if (ret)
112                 return ret;
113
114         enable_enet_clk(1);
115
116         return 0;
117 }
118 #endif /* CONFIG_FEC_MXC */
119
120 int board_init(void)
121 {
122         /* address of boot parameters */
123         gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
124
125         /*
126          * Enable GPIO on NAND_WE_B/eMMC_RST with 100k pull-down. eMMC_RST
127          * is pulled high with 4.7k for eMMC devices. This allows to reliably
128          * detect eMMC/NAND flash
129          */
130         imx_iomux_v3_setup_multiple_pads(flash_detection_pads, ARRAY_SIZE(flash_detection_pads));
131         gpio_request(FLASH_DET_GPIO, "flash-detection-gpio");
132         is_emmc = gpio_get_value(FLASH_DET_GPIO);
133         gpio_free(FLASH_DET_GPIO);
134
135 #ifdef CONFIG_FEC_MXC
136         setup_fec();
137 #endif
138
139 #ifdef CONFIG_NAND_MXS
140         setup_gpmi_nand();
141 #endif
142         return 0;
143 }
144
145 #ifdef CONFIG_CMD_BMODE
146 /* TODO */
147 static const struct boot_mode board_boot_modes[] = {
148         /* 4 bit bus width */
149         {"nand", MAKE_CFGVAL(0x40, 0x34, 0x00, 0x00)},
150         {"sd1", MAKE_CFGVAL(0x10, 0x10, 0x00, 0x00)},
151         {NULL, 0},
152 };
153 #endif
154
155 int board_late_init(void)
156 {
157 #ifdef CONFIG_TDX_CFG_BLOCK
158         /*
159          * If we have a valid config block and it says we are a module with
160          * Wi-Fi/Bluetooth make sure we use the -wifi device tree.
161          */
162         if (tdx_hw_tag.prodid == COLIBRI_IMX6ULL_WIFI_BT_IT ||
163             tdx_hw_tag.prodid == COLIBRI_IMX6ULL_WIFI_BT) {
164                 env_set("variant", "-wifi");
165         } else {
166                 if (is_emmc)
167                         env_set("variant", "-emmc");
168                 else
169                         env_set("variant", "");
170         }
171 #else
172         if (is_emmc)
173                 env_set("variant", "-emmc");
174         else
175                 env_set("variant", "");
176 #endif
177
178         /*
179          * Disable output driver of PAD CCM_PMIC_STBY_REQ. This prevents the
180          * SOC to request for a lower voltage during sleep. This is necessary
181          * because the voltage is changing too slow for the SOC to wake up
182          * properly.
183          */
184         __raw_writel(0x8080, MX6_PAD_SNVS_PMIC_STBY_REQ_ADDR);
185
186 #ifdef CONFIG_CMD_BMODE
187         add_board_boot_modes(board_boot_modes);
188 #endif
189
190         if (IS_ENABLED(CONFIG_USB) && is_boot_from_usb()) {
191                 env_set("bootdelay", "0");
192                 if (IS_ENABLED(CONFIG_CMD_USB_SDP)) {
193                         printf("Serial Downloader recovery mode, using sdp command\n");
194                         env_set("bootcmd", "sdp 0");
195                 } else if (IS_ENABLED(CONFIG_CMD_FASTBOOT)) {
196                         printf("Fastboot recovery mode, using fastboot command\n");
197                         env_set("bootcmd", "fastboot usb 0");
198                 }
199         }
200
201 #if defined(CONFIG_VIDEO)
202         setup_lcd();
203 #endif
204
205         return 0;
206 }
207
208 int checkboard(void)
209 {
210         printf("Model: Toradex Colibri iMX6ULL\n");
211
212         return tdx_checkboard();
213 }
214
215 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
216 int ft_board_setup(void *blob, struct bd_info *bd)
217 {
218         return ft_common_board_setup(blob, bd);
219 }
220 #endif
221
222 static struct mxc_serial_plat mxc_serial_plat = {
223         .reg = (struct mxc_uart *)UART1_BASE,
224         .use_dte = 1,
225 };
226
227 U_BOOT_DRVINFO(mxc_serial) = {
228         .name = "serial_mxc",
229         .plat = &mxc_serial_plat,
230 };
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