xref: /openbmc/u-boot/arch/arm/mach-imx/spl.c (revision 30df9f770b22f3c89d61947950da362117c43c63)
1 /*
2  * Copyright (C) 2014 Gateworks Corporation
3  * Copyright (C) 2011-2012 Freescale Semiconductor, Inc.
4  *
5  * Author: Tim Harvey <tharvey@gateworks.com>
6  *
7  * SPDX-License-Identifier:     GPL-2.0+
8  */
9 
10 #include <common.h>
11 #include <asm/io.h>
12 #include <asm/arch/imx-regs.h>
13 #include <asm/arch/sys_proto.h>
14 #include <asm/spl.h>
15 #include <spl.h>
16 #include <asm/mach-imx/hab.h>
17 
18 DECLARE_GLOBAL_DATA_PTR;
19 
20 #if defined(CONFIG_MX6)
21 /* determine boot device from SRC_SBMR1 (BOOT_CFG[4:1]) or SRC_GPR9 register */
22 u32 spl_boot_device(void)
23 {
24 	unsigned int bmode = readl(&src_base->sbmr2);
25 	u32 reg = imx6_src_get_boot_mode();
26 
27 	/*
28 	 * Check for BMODE if serial downloader is enabled
29 	 * BOOT_MODE - see IMX6DQRM Table 8-1
30 	 */
31 	if (((bmode >> 24) & 0x03) == 0x01) /* Serial Downloader */
32 		return BOOT_DEVICE_BOARD;
33 
34 	/*
35 	 * The above method does not detect that the boot ROM used
36 	 * serial downloader in case the boot ROM decided to use the
37 	 * serial downloader as a fall back (primary boot source failed).
38 	 *
39 	 * Infer that the boot ROM used the USB serial downloader by
40 	 * checking whether the USB PHY is currently active... This
41 	 * assumes that SPL did not (yet) initialize the USB PHY...
42 	 */
43 	if (is_usbotg_phy_active())
44 		return BOOT_DEVICE_BOARD;
45 
46 	/* BOOT_CFG1[7:4] - see IMX6DQRM Table 8-8 */
47 	switch ((reg & IMX6_BMODE_MASK) >> IMX6_BMODE_SHIFT) {
48 	 /* EIM: See 8.5.1, Table 8-9 */
49 	case IMX6_BMODE_EMI:
50 		/* BOOT_CFG1[3]: NOR/OneNAND Selection */
51 		switch ((reg & IMX6_BMODE_EMI_MASK) >> IMX6_BMODE_EMI_SHIFT) {
52 		case IMX6_BMODE_ONENAND:
53 			return BOOT_DEVICE_ONENAND;
54 		case IMX6_BMODE_NOR:
55 			return BOOT_DEVICE_NOR;
56 		break;
57 		}
58 	/* Reserved: Used to force Serial Downloader */
59 	case IMX6_BMODE_RESERVED:
60 		return BOOT_DEVICE_BOARD;
61 	/* SATA: See 8.5.4, Table 8-20 */
62 #if !defined(CONFIG_MX6UL) && !defined(CONFIG_MX6ULL)
63 	case IMX6_BMODE_SATA:
64 		return BOOT_DEVICE_SATA;
65 #endif
66 	/* Serial ROM: See 8.5.5.1, Table 8-22 */
67 	case IMX6_BMODE_SERIAL_ROM:
68 		/* BOOT_CFG4[2:0] */
69 		switch ((reg & IMX6_BMODE_SERIAL_ROM_MASK) >>
70 			IMX6_BMODE_SERIAL_ROM_SHIFT) {
71 		case IMX6_BMODE_ECSPI1:
72 		case IMX6_BMODE_ECSPI2:
73 		case IMX6_BMODE_ECSPI3:
74 		case IMX6_BMODE_ECSPI4:
75 		case IMX6_BMODE_ECSPI5:
76 			return BOOT_DEVICE_SPI;
77 		case IMX6_BMODE_I2C1:
78 		case IMX6_BMODE_I2C2:
79 		case IMX6_BMODE_I2C3:
80 			return BOOT_DEVICE_I2C;
81 		}
82 		break;
83 	/* SD/eSD: 8.5.3, Table 8-15  */
84 	case IMX6_BMODE_SD:
85 	case IMX6_BMODE_ESD:
86 		return BOOT_DEVICE_MMC1;
87 	/* MMC/eMMC: 8.5.3 */
88 	case IMX6_BMODE_MMC:
89 	case IMX6_BMODE_EMMC:
90 		return BOOT_DEVICE_MMC1;
91 	/* NAND Flash: 8.5.2, Table 8-10 */
92 	case IMX6_BMODE_NAND:
93 		return BOOT_DEVICE_NAND;
94 	}
95 	return BOOT_DEVICE_NONE;
96 }
97 #endif
98 
99 #if defined(CONFIG_SPL_MMC_SUPPORT)
100 /* called from spl_mmc to see type of boot mode for storage (RAW or FAT) */
101 u32 spl_boot_mode(const u32 boot_device)
102 {
103 	switch (spl_boot_device()) {
104 	/* for MMC return either RAW or FAT mode */
105 	case BOOT_DEVICE_MMC1:
106 	case BOOT_DEVICE_MMC2:
107 #if defined(CONFIG_SPL_FAT_SUPPORT)
108 		return MMCSD_MODE_FS;
109 #elif defined(CONFIG_SUPPORT_EMMC_BOOT)
110 		return MMCSD_MODE_EMMCBOOT;
111 #else
112 		return MMCSD_MODE_RAW;
113 #endif
114 		break;
115 	default:
116 		puts("spl: ERROR:  unsupported device\n");
117 		hang();
118 	}
119 }
120 #endif
121 
122 #if defined(CONFIG_SECURE_BOOT)
123 
124 __weak void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
125 {
126 	typedef void __noreturn (*image_entry_noargs_t)(void);
127 
128 	image_entry_noargs_t image_entry =
129 		(image_entry_noargs_t)(unsigned long)spl_image->entry_point;
130 
131 	debug("image entry point: 0x%lX\n", spl_image->entry_point);
132 
133 	/* HAB looks for the CSF at the end of the authenticated data therefore,
134 	 * we need to subtract the size of the CSF from the actual filesize */
135 	if (authenticate_image(spl_image->load_addr,
136 			       spl_image->size - CONFIG_CSF_SIZE)) {
137 		image_entry();
138 	} else {
139 		puts("spl: ERROR:  image authentication unsuccessful\n");
140 		hang();
141 	}
142 }
143 
144 #endif
145 
146 #if defined(CONFIG_MX6) && defined(CONFIG_SPL_OS_BOOT)
147 int dram_init_banksize(void)
148 {
149 	gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
150 	gd->bd->bi_dram[0].size = imx_ddr_size();
151 
152 	return 0;
153 }
154 #endif
155