1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2015 Samsung Electronics 4 * Przemyslaw Marczak <p.marczak@samsung.com> 5 */ 6 7 #include <common.h> 8 #include <adc.h> 9 #include <dm.h> 10 #include <errno.h> 11 #include <fdtdec.h> 12 #include <power/pmic.h> 13 #include <power/regulator.h> 14 #include <power/s2mps11.h> 15 #include <samsung/exynos5-dt-types.h> 16 #include <samsung/misc.h> 17 18 DECLARE_GLOBAL_DATA_PTR; 19 20 static const struct udevice_id board_ids[] = { 21 { .compatible = "samsung,odroidxu3", .data = EXYNOS5_BOARD_ODROID_XU3 }, 22 { .compatible = "samsung,exynos5", .data = EXYNOS5_BOARD_GENERIC }, 23 { }, 24 }; 25 26 /** 27 * Odroix XU3/XU4/HC1/HC2 board revisions (from HC1+_HC2_MAIN_REV0.1_20171017.pdf): 28 * Rev ADCmax Board 29 * 0.1 0 XU3 0.1 30 * 0.2 372 XU3 0.2 | XU3L - no DISPLAYPORT (probe I2C0:0x40 / INA231) 31 * 0.3 1280 XU4 0.1 32 * 0.4 739 XU4 0.2 33 * 0.5 1016 XU4+Air0.1 (Passive cooling) 34 * 0.6 1309 XU4-HC1 0.1 35 * 0.7 1470 XU4-HC1+ 0.1 (HC2) 36 * Use +1% for ADC value tolerance in the array below, the code loops until 37 * the measured ADC value is lower than then ADCmax from the array. 38 */ 39 struct odroid_rev_info odroid_info[] = { 40 { EXYNOS5_BOARD_ODROID_XU3_REV01, 1, 10, "xu3" }, 41 { EXYNOS5_BOARD_ODROID_XU3_REV02, 2, 375, "xu3" }, 42 { EXYNOS5_BOARD_ODROID_XU4_REV01, 1, 1293, "xu4" }, 43 { EXYNOS5_BOARD_ODROID_HC1_REV01, 1, 1322, "hc1" }, 44 { EXYNOS5_BOARD_ODROID_HC2_REV01, 1, 1484, "hc1" }, 45 { EXYNOS5_BOARD_ODROID_UNKNOWN, 0, 4095, "unknown" }, 46 }; 47 48 static unsigned int odroid_get_rev(void) 49 { 50 int i; 51 52 for (i = 0; i < ARRAY_SIZE(odroid_info); i++) { 53 if (odroid_info[i].board_type == gd->board_type) 54 return odroid_info[i].board_rev; 55 } 56 57 return 0; 58 } 59 60 static int odroid_get_board_type(void) 61 { 62 unsigned int adcval; 63 int ret, i; 64 65 ret = adc_channel_single_shot("adc", CONFIG_ODROID_REV_AIN, &adcval); 66 if (ret) 67 goto rev_default; 68 69 for (i = 0; i < ARRAY_SIZE(odroid_info); i++) { 70 /* ADC tolerance: +1% */ 71 if (adcval < odroid_info[i].adc_val) 72 return odroid_info[i].board_type; 73 } 74 75 rev_default: 76 return EXYNOS5_BOARD_ODROID_XU3; 77 } 78 79 /** 80 * odroid_get_type_str - returns pointer to one of the board type string. 81 * Board types: "xu3", "xu3-lite", "xu4". However the "xu3lite" can be 82 * detected only when the i2c controller is ready to use. Fortunately, 83 * XU3 and XU3L are compatible, and the information about board lite 84 * revision is needed before booting the linux, to set proper environment 85 * variable: $fdtfile. 86 */ 87 static const char *odroid_get_type_str(void) 88 { 89 const char *type_xu3l = "xu3-lite"; 90 struct udevice *dev, *chip; 91 int i, ret; 92 93 if (gd->board_type != EXYNOS5_BOARD_ODROID_XU3_REV02) 94 goto exit; 95 96 ret = pmic_get("s2mps11", &dev); 97 if (ret) 98 goto exit; 99 100 /* Enable LDO26: 3.0V */ 101 ret = pmic_reg_write(dev, S2MPS11_REG_L26CTRL, 102 S2MPS11_LDO26_ENABLE); 103 if (ret) 104 goto exit; 105 106 /* Check XU3Lite by probe INA231 I2C0:0x40 */ 107 ret = uclass_get_device(UCLASS_I2C, 0, &dev); 108 if (ret) 109 goto exit; 110 111 ret = dm_i2c_probe(dev, 0x40, 0x0, &chip); 112 if (ret) 113 return type_xu3l; 114 115 exit: 116 for (i = 0; i < ARRAY_SIZE(odroid_info); i++) { 117 if (odroid_info[i].board_type == gd->board_type) 118 return odroid_info[i].name; 119 } 120 121 return NULL; 122 } 123 124 bool board_is_odroidxu3(void) 125 { 126 if (gd->board_type >= EXYNOS5_BOARD_ODROID_XU3 && 127 gd->board_type <= EXYNOS5_BOARD_ODROID_XU3_REV02) 128 return true; 129 130 return false; 131 } 132 133 bool board_is_odroidxu4(void) 134 { 135 if (gd->board_type == EXYNOS5_BOARD_ODROID_XU4_REV01) 136 return true; 137 138 return false; 139 } 140 141 bool board_is_odroidhc1(void) 142 { 143 if (gd->board_type == EXYNOS5_BOARD_ODROID_HC1_REV01) 144 return true; 145 146 return false; 147 } 148 149 bool board_is_odroidhc2(void) 150 { 151 if (gd->board_type == EXYNOS5_BOARD_ODROID_HC2_REV01) 152 return true; 153 154 return false; 155 } 156 157 bool board_is_generic(void) 158 { 159 if (gd->board_type == EXYNOS5_BOARD_GENERIC) 160 return true; 161 162 return false; 163 } 164 165 /** 166 * get_board_rev() - return detected board revision. 167 * 168 * @return: return board revision number for XU3 or 0 for generic 169 */ 170 u32 get_board_rev(void) 171 { 172 if (board_is_generic()) 173 return 0; 174 175 return odroid_get_rev(); 176 } 177 178 /** 179 * get_board_type() - returns board type string. 180 * 181 * @return: return board type string for XU3 or empty string for generic 182 */ 183 const char *get_board_type(void) 184 { 185 const char *generic = ""; 186 187 if (board_is_generic()) 188 return generic; 189 190 return odroid_get_type_str(); 191 } 192 193 /** 194 * set_board_type() - set board type in gd->board_type. 195 * As default type set EXYNOS5_BOARD_GENERIC, if detect Odroid, 196 * then set its proper type. 197 */ 198 void set_board_type(void) 199 { 200 const struct udevice_id *of_match = board_ids; 201 int ret; 202 203 gd->board_type = EXYNOS5_BOARD_GENERIC; 204 205 while (of_match->compatible) { 206 ret = fdt_node_check_compatible(gd->fdt_blob, 0, 207 of_match->compatible); 208 if (ret) 209 of_match++; 210 211 gd->board_type = of_match->data; 212 break; 213 } 214 215 /* If Odroid, then check its revision */ 216 if (board_is_odroidxu3()) 217 gd->board_type = odroid_get_board_type(); 218 } 219