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ARM64: zynqmp: Force certain bootmode for SPL
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1 /*
2  * Copyright 2015 - 2016 Xilinx, Inc.
3  *
4  * Michal Simek <michal.simek@xilinx.com>
5  *
6  * SPDX-License-Identifier:     GPL-2.0+
7  */
8
9 #include <common.h>
10 #include <debug_uart.h>
11 #include <spl.h>
12
13 #include <asm/io.h>
14 #include <asm/spl.h>
15 #include <asm/arch/hardware.h>
16 #include <asm/arch/sys_proto.h>
17
18 void board_init_f(ulong dummy)
19 {
20         psu_init();
21         board_early_init_r();
22
23 #ifdef CONFIG_DEBUG_UART
24         /* Uart debug for sure */
25         debug_uart_init();
26         puts("Debug uart enabled\n"); /* or printch() */
27 #endif
28         /* Delay is required for clocks to be propagated */
29         udelay(1000000);
30
31         /* Clear the BSS */
32         memset(__bss_start, 0, __bss_end - __bss_start);
33
34         /* No need to call timer init - it is empty for ZynqMP */
35         board_init_r(NULL, 0);
36 }
37
38 #ifdef CONFIG_SPL_BOARD_INIT
39 void spl_board_init(void)
40 {
41         preloader_console_init();
42         board_init();
43 }
44 #endif
45
46 u32 spl_boot_device(void)
47 {
48         u32 reg = 0;
49         u8 bootmode;
50
51 #if defined(CONFIG_SPL_ZYNQMP_ALT_BOOTMODE_ENABLED)
52         /* Change default boot mode at run-time */
53         writel(BOOT_MODE_USE_ALT |
54                CONFIG_SPL_ZYNQMP_ALT_BOOTMODE << BOOT_MODE_ALT_SHIFT,
55                &crlapb_base->boot_mode);
56 #endif
57
58         reg = readl(&crlapb_base->boot_mode);
59         bootmode = reg & BOOT_MODES_MASK;
60
61         switch (bootmode) {
62         case JTAG_MODE:
63                 return BOOT_DEVICE_RAM;
64 #ifdef CONFIG_SPL_MMC_SUPPORT
65         case EMMC_MODE:
66         case SD_MODE:
67         case SD_MODE1:
68                 return BOOT_DEVICE_MMC1;
69 #endif
70         default:
71                 printf("Invalid Boot Mode:0x%x\n", bootmode);
72                 break;
73         }
74
75         return 0;
76 }
77
78 u32 spl_boot_mode(const u32 boot_device)
79 {
80         switch (spl_boot_device()) {
81         case BOOT_DEVICE_RAM:
82                 return 0;
83         case BOOT_DEVICE_MMC1:
84                 return MMCSD_MODE_FS;
85         default:
86                 puts("spl: error: unsupported device\n");
87                 hang();
88         }
89 }
90
91 __weak void psu_init(void)
92 {
93          /*
94           * This function is overridden by the one in
95           * board/xilinx/zynqmp/(platform)/psu_init_gpl.c, if it exists.
96           */
97 }
98
99 #ifdef CONFIG_SPL_OS_BOOT
100 int spl_start_uboot(void)
101 {
102         return 0;
103 }
104 #endif
105
106 #ifdef CONFIG_SPL_LOAD_FIT
107 int board_fit_config_name_match(const char *name)
108 {
109         /* Just empty function now - can't decide what to choose */
110         debug("%s: %s\n", __func__, name);
111
112         return 0;
113 }
114 #endif