1 /* 2 * Copyright (C) 2015 Samsung Electronics 3 * Przemyslaw Marczak <p.marczak@samsung.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <adc.h> 10 #include <dm.h> 11 #include <errno.h> 12 #include <fdtdec.h> 13 #include <power/pmic.h> 14 #include <power/regulator.h> 15 #include <power/s2mps11.h> 16 #include <samsung/exynos5-dt-types.h> 17 #include <samsung/misc.h> 18 19 DECLARE_GLOBAL_DATA_PTR; 20 21 static const struct udevice_id board_ids[] = { 22 { .compatible = "samsung,odroidxu3", .data = EXYNOS5_BOARD_ODROID_XU3 }, 23 { .compatible = "samsung,exynos5", .data = EXYNOS5_BOARD_GENERIC }, 24 { }, 25 }; 26 27 /** 28 * Odroix XU3/4 board revisions: 29 * Rev ADCmax Board 30 * 0.1 0 XU3 0.1 31 * 0.2 410 XU3 0.2 | XU3L - no DISPLAYPORT (probe I2C0:0x40 / INA231) 32 * 0.3 1408 XU4 0.1 33 * Use +10 % for ADC value tolerance. 34 */ 35 struct odroid_rev_info odroid_info[] = { 36 { EXYNOS5_BOARD_ODROID_XU3_REV01, 1, 10, "xu3" }, 37 { EXYNOS5_BOARD_ODROID_XU3_REV02, 2, 410, "xu3" }, 38 { EXYNOS5_BOARD_ODROID_XU4_REV01, 1, 1408, "xu4" }, 39 { EXYNOS5_BOARD_ODROID_UNKNOWN, 0, 4095, "unknown" }, 40 }; 41 42 static unsigned int odroid_get_rev(void) 43 { 44 int i; 45 46 for (i = 0; i < ARRAY_SIZE(odroid_info); i++) { 47 if (odroid_info[i].board_type == gd->board_type) 48 return odroid_info[i].board_rev; 49 } 50 51 return 0; 52 } 53 54 static int odroid_get_board_type(void) 55 { 56 unsigned int adcval; 57 int ret, i; 58 59 ret = adc_channel_single_shot("adc", CONFIG_ODROID_REV_AIN, &adcval); 60 if (ret) 61 goto rev_default; 62 63 for (i = 0; i < ARRAY_SIZE(odroid_info); i++) { 64 /* ADC tolerance: +20 % */ 65 if (adcval < odroid_info[i].adc_val) 66 return odroid_info[i].board_type; 67 } 68 69 rev_default: 70 return EXYNOS5_BOARD_ODROID_XU3; 71 } 72 73 /** 74 * odroid_get_type_str - returns pointer to one of the board type string. 75 * Board types: "xu3", "xu3-lite", "xu4". However the "xu3lite" can be 76 * detected only when the i2c controller is ready to use. Fortunately, 77 * XU3 and XU3L are compatible, and the information about board lite 78 * revision is needed before booting the linux, to set proper environment 79 * variable: $fdtfile. 80 */ 81 static const char *odroid_get_type_str(void) 82 { 83 const char *type_xu3l = "xu3-lite"; 84 struct udevice *dev, *chip; 85 int i, ret; 86 87 if (gd->board_type != EXYNOS5_BOARD_ODROID_XU3_REV02) 88 goto exit; 89 90 ret = pmic_get("s2mps11", &dev); 91 if (ret) 92 goto exit; 93 94 /* Enable LDO26: 3.0V */ 95 ret = pmic_reg_write(dev, S2MPS11_REG_L26CTRL, 96 S2MPS11_LDO26_ENABLE); 97 if (ret) 98 goto exit; 99 100 /* Check XU3Lite by probe INA231 I2C0:0x40 */ 101 ret = uclass_get_device(UCLASS_I2C, 0, &dev); 102 if (ret) 103 goto exit; 104 105 ret = dm_i2c_probe(dev, 0x40, 0x0, &chip); 106 if (ret) 107 return type_xu3l; 108 109 exit: 110 for (i = 0; i < ARRAY_SIZE(odroid_info); i++) { 111 if (odroid_info[i].board_type == gd->board_type) 112 return odroid_info[i].name; 113 } 114 115 return NULL; 116 } 117 118 bool board_is_odroidxu3(void) 119 { 120 if (gd->board_type >= EXYNOS5_BOARD_ODROID_XU3 && 121 gd->board_type <= EXYNOS5_BOARD_ODROID_XU3_REV02) 122 return true; 123 124 return false; 125 } 126 127 bool board_is_odroidxu4(void) 128 { 129 if (gd->board_type == EXYNOS5_BOARD_ODROID_XU4_REV01) 130 return true; 131 132 return false; 133 } 134 135 bool board_is_generic(void) 136 { 137 if (gd->board_type == EXYNOS5_BOARD_GENERIC) 138 return true; 139 140 return false; 141 } 142 143 /** 144 * get_board_rev() - return detected board revision. 145 * 146 * @return: return board revision number for XU3 or 0 for generic 147 */ 148 u32 get_board_rev(void) 149 { 150 if (board_is_generic()) 151 return 0; 152 153 return odroid_get_rev(); 154 } 155 156 /** 157 * get_board_type() - returns board type string. 158 * 159 * @return: return board type string for XU3 or empty string for generic 160 */ 161 const char *get_board_type(void) 162 { 163 const char *generic = ""; 164 165 if (board_is_generic()) 166 return generic; 167 168 return odroid_get_type_str(); 169 } 170 171 /** 172 * set_board_type() - set board type in gd->board_type. 173 * As default type set EXYNOS5_BOARD_GENERIC, if detect Odroid, 174 * then set its proper type. 175 */ 176 void set_board_type(void) 177 { 178 const struct udevice_id *of_match = board_ids; 179 int ret; 180 181 gd->board_type = EXYNOS5_BOARD_GENERIC; 182 183 while (of_match->compatible) { 184 ret = fdt_node_check_compatible(gd->fdt_blob, 0, 185 of_match->compatible); 186 if (ret) 187 of_match++; 188 189 gd->board_type = of_match->data; 190 break; 191 } 192 193 /* If Odroid, then check its revision */ 194 if (board_is_odroidxu3()) 195 gd->board_type = odroid_get_board_type(); 196 } 197