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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/spl.h>
14 #include <spl.h>
15
16 #if defined(CONFIG_MX6)
17 /* determine boot device from SRC_SBMR1 register (BOOT_CFG[4:1]) */
18 u32 spl_boot_device(void)
19 {
20         struct src *psrc = (struct src *)SRC_BASE_ADDR;
21         unsigned reg = readl(&psrc->sbmr1);
22
23         /* BOOT_CFG1[7:4] - see IMX6DQRM Table 8-8 */
24         switch ((reg & 0x000000FF) >> 4) {
25          /* EIM: See 8.5.1, Table 8-9 */
26         case 0x0:
27                 /* BOOT_CFG1[3]: NOR/OneNAND Selection */
28                 if ((reg & 0x00000008) >> 3)
29                         return BOOT_DEVICE_ONENAND;
30                 else
31                         return BOOT_DEVICE_NOR;
32                 break;
33         /* SATA: See 8.5.4, Table 8-20 */
34         case 0x2:
35                 return BOOT_DEVICE_SATA;
36         /* Serial ROM: See 8.5.5.1, Table 8-22 */
37         case 0x3:
38                 /* BOOT_CFG4[2:0] */
39                 switch ((reg & 0x07000000) >> 24) {
40                 case 0x0 ... 0x4:
41                         return BOOT_DEVICE_SPI;
42                 case 0x5 ... 0x7:
43                         return BOOT_DEVICE_I2C;
44                 }
45                 break;
46         /* SD/eSD: 8.5.3, Table 8-15  */
47         case 0x4:
48         case 0x5:
49                 return BOOT_DEVICE_MMC1;
50         /* MMC/eMMC: 8.5.3 */
51         case 0x6:
52         case 0x7:
53                 return BOOT_DEVICE_MMC1;
54         /* NAND Flash: 8.5.2 */
55         case 0x8 ... 0xf:
56                 return BOOT_DEVICE_NAND;
57         }
58         return BOOT_DEVICE_NONE;
59 }
60 #endif
61
62 #if defined(CONFIG_SPL_MMC_SUPPORT)
63 /* called from spl_mmc to see type of boot mode for storage (RAW or FAT) */
64 u32 spl_boot_mode(void)
65 {
66         switch (spl_boot_device()) {
67         /* for MMC return either RAW or FAT mode */
68         case BOOT_DEVICE_MMC1:
69         case BOOT_DEVICE_MMC2:
70 #ifdef CONFIG_SPL_FAT_SUPPORT
71                 return MMCSD_MODE_FAT;
72 #else
73                 return MMCSD_MODE_RAW;
74 #endif
75                 break;
76         default:
77                 puts("spl: ERROR:  unsupported device\n");
78                 hang();
79         }
80 }
81 #endif