1 /* 2 * Author: Henry Bruce <henry.bruce (at) intel.com> 3 * Evan Steele <evan.steele (at) intel.com> 4 * Copyright (c) 2014 Intel Corporation. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining 7 * a copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sublicense, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be 15 * included in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 24 */ 25 26 #include <stdlib.h> 27 #include <string.h> 28 #include <sys/utsname.h> 29 #include <ctype.h> 30 31 #include "common.h" 32 #include "x86/intel_minnow_byt_compatible.h" 33 34 #define PLATFORM_NAME "MinnowBoard MAX" 35 #define I2C_BUS_DEFAULT 7 36 #define MAX_LENGTH 8 37 #define I2CNAME "designware" 38 39 int arch_nr_gpios_adjust = 0x100; 40 41 mraa_result_t 42 mraa_set_pininfo(mraa_board_t* board, int mraa_index, char* name, mraa_pincapabilities_t caps, int sysfs_pin) 43 { 44 if (mraa_index < board->phy_pin_count) { 45 // adjust mraa_index for ARCH_NR_GPIOS value 46 mraa_pininfo_t* pin_info = &board->pins[mraa_index]; 47 strncpy(pin_info->name, name, MAX_LENGTH); 48 pin_info->capabilites = caps; 49 if (caps.gpio) { 50 pin_info->gpio.pinmap = sysfs_pin | arch_nr_gpios_adjust; 51 pin_info->gpio.mux_total = 0; 52 } 53 if (caps.i2c) { 54 pin_info->i2c.pinmap = 1; 55 pin_info->i2c.mux_total = 0; 56 } 57 if (caps.pwm) { 58 int controller = 0; 59 if (strncmp(name, "PWM", 3) == 0 && strlen(name) > 3 && isdigit(name[3])) 60 controller = name[3] - '0'; 61 pin_info->pwm.parent_id = controller; 62 pin_info->pwm.pinmap = 0; 63 pin_info->pwm.mux_total = 0; 64 } 65 if (caps.spi) { 66 pin_info->spi.mux_total = 0; 67 } 68 return MRAA_SUCCESS; 69 } 70 return MRAA_ERROR_INVALID_RESOURCE; 71 } 72 73 mraa_result_t 74 mraa_get_pin_index(mraa_board_t* board, char* name, int* pin_index) 75 { 76 int i; 77 for (i = 0; i < board->phy_pin_count; ++i) { 78 if (strncmp(name, board->pins[i].name, MAX_LENGTH) == 0) { 79 *pin_index = i; 80 return MRAA_SUCCESS; 81 } 82 } 83 return MRAA_ERROR_INVALID_RESOURCE; 84 } 85 86 mraa_board_t* 87 mraa_intel_minnowboard_byt_compatible(mraa_boolean_t turbot) 88 { 89 mraa_board_t* b = (mraa_board_t*) calloc(1, sizeof(mraa_board_t)); 90 91 struct utsname running_uname; 92 int uname_major, uname_minor, max_pins[28]; 93 94 if (b == NULL) { 95 return NULL; 96 } 97 98 b->platform_name = PLATFORM_NAME; 99 if (turbot) { 100 b->platform_version = "Turbot"; 101 b->gpio_count = b->phy_pin_count = MRAA_INTEL_MINNOW_TURBOT_PINCOUNT; 102 } else { 103 b->platform_version = "Ax"; 104 b->gpio_count = b->phy_pin_count = MRAA_INTEL_MINNOW_MAX_PINCOUNT; 105 } 106 107 b->pins = (mraa_pininfo_t*) calloc(b->phy_pin_count, sizeof(mraa_pininfo_t)); 108 if (b->pins == NULL) { 109 goto error; 110 } 111 112 b->adv_func = (mraa_adv_func_t*) calloc(1, sizeof(mraa_adv_func_t)); 113 if (b->adv_func == NULL) { 114 free(b->pins); 115 goto error; 116 } 117 118 if (uname(&running_uname) != 0) { 119 free(b->pins); 120 free(b->adv_func); 121 goto error; 122 } 123 124 sscanf(running_uname.release, "%d.%d", &uname_major, &uname_minor); 125 126 /* if we are on Linux 3.17 or lower they use a 256 max and number the GPIOs down 127 * if we are on 3.18 or higher (ea584595fc85e65796335033dfca25ed655cd0ed) (for now) 128 * they start at 512 and number down, at some point this is going to change again when 129 * GPIO moves to a radix. 130 */ 131 if (uname_major <= 3 && uname_minor <= 17) { 132 arch_nr_gpios_adjust = 0; 133 } 134 135 mraa_set_pininfo(b, 0, "INVALID", (mraa_pincapabilities_t){ 0, 0, 0, 0, 0, 0, 0, 0 }, -1); 136 mraa_set_pininfo(b, 1, "GND", (mraa_pincapabilities_t){ 0, 0, 0, 0, 0, 0, 0, 0 }, -1); 137 mraa_set_pininfo(b, 2, "GND", (mraa_pincapabilities_t){ 0, 0, 0, 0, 0, 0, 0, 0 }, -1); 138 mraa_set_pininfo(b, 3, "5v", (mraa_pincapabilities_t){ 0, 0, 0, 0, 0, 0, 0, 0 }, -1); 139 mraa_set_pininfo(b, 4, "3.3v", (mraa_pincapabilities_t){ 1, 0, 0, 0, 0, 0, 0, 0 }, -1); 140 mraa_set_pininfo(b, 5, "SPI_CS", (mraa_pincapabilities_t){ 1, 0, 0, 0, 1, 0, 0, 0 }, 220); 141 mraa_set_pininfo(b, 6, "UART1TX", (mraa_pincapabilities_t){ 1, 0, 0, 0, 0, 0, 0, 1 }, 225); 142 mraa_set_pininfo(b, 7, "SPIMISO", (mraa_pincapabilities_t){ 1, 0, 0, 0, 1, 0, 0, 0 }, 221); 143 mraa_set_pininfo(b, 8, "UART1RX", (mraa_pincapabilities_t){ 1, 0, 0, 0, 0, 0, 0, 1 }, 224); 144 mraa_set_pininfo(b, 9, "SPIMOSI", (mraa_pincapabilities_t){ 1, 0, 0, 0, 1, 0, 0, 0 }, 222); 145 mraa_set_pininfo(b, 10, "UART1CT", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 227); 146 mraa_set_pininfo(b, 11, "SPI_CLK", (mraa_pincapabilities_t){ 1, 0, 0, 0, 1, 0, 0, 0 }, 223); 147 mraa_set_pininfo(b, 12, "UART1RT", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 226); 148 mraa_set_pininfo(b, 13, "I2C_SCL", (mraa_pincapabilities_t){ 1, 0, 0, 0, 0, 1, 0, 0 }, 243); 149 mraa_set_pininfo(b, 14, "I2S_CLK", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 216); 150 mraa_set_pininfo(b, 15, "I2C_SDA", (mraa_pincapabilities_t){ 1, 0, 0, 0, 0, 1, 0, 0 }, 242); 151 mraa_set_pininfo(b, 16, "I2S_FRM", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 217); 152 mraa_set_pininfo(b, 17, "UART2TX", (mraa_pincapabilities_t){ 1, 0, 0, 0, 0, 0, 0, 1 }, 229); 153 mraa_set_pininfo(b, 18, "I2S_DO", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 219); 154 mraa_set_pininfo(b, 19, "UART2RX", (mraa_pincapabilities_t){ 1, 0, 0, 0, 0, 0, 0, 1 }, 228); 155 mraa_set_pininfo(b, 20, "I2S_DI", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 218); 156 mraa_set_pininfo(b, 21, "S5_0", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 82); 157 mraa_set_pininfo(b, 22, "PWM0", (mraa_pincapabilities_t){ 1, 0, 1, 0, 0, 0, 0, 0 }, 158 248); // Assume BIOS configured for PWM 159 mraa_set_pininfo(b, 23, "S5_1", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 83); 160 mraa_set_pininfo(b, 24, "PWM1", (mraa_pincapabilities_t){ 1, 0, 1, 0, 0, 0, 0, 0 }, 161 249); // Assume BIOS configured for PWM 162 mraa_set_pininfo(b, 25, "S5_4", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 84); 163 if (turbot) { 164 mraa_set_pininfo(b, 26, "I2S_MCLK", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 253); 165 mraa_set_pininfo(b, 27, "S5_22", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 104); 166 } else { 167 mraa_set_pininfo(b, 26, "IBL8254", (mraa_pincapabilities_t){ 1, 1, 0, 0, 0, 0, 0, 0 }, 208); 168 } 169 170 // Set number of i2c adaptors usable from userspace 171 b->i2c_bus_count = 1; 172 173 // Configure i2c adaptor #7 and make it the default 174 int pin_index_sda, pin_index_scl; 175 if (mraa_get_pin_index(b, "I2C_SDA", &pin_index_sda) == MRAA_SUCCESS && 176 mraa_get_pin_index(b, "I2C_SCL", &pin_index_scl) == MRAA_SUCCESS) { 177 int bus = mraa_find_i2c_bus(I2CNAME, 0); 178 if (bus == -1) { 179 b->i2c_bus_count = 0; 180 } else { 181 b->def_i2c_bus = bus; 182 b->i2c_bus[0].bus_id = b->def_i2c_bus; 183 b->i2c_bus[0].sda = pin_index_sda; 184 b->i2c_bus[0].scl = pin_index_scl; 185 } 186 } 187 188 // Configure PWM 189 b->pwm_default_period = 500; 190 b->pwm_max_period = 1000000000; 191 b->pwm_min_period = 1; 192 193 b->spi_bus_count = 1; 194 b->def_spi_bus = 0; 195 b->spi_bus[0].bus_id = 0; 196 b->spi_bus[0].slave_s = 0; 197 b->spi_bus[0].cs = 5; 198 b->spi_bus[0].mosi = 9; 199 b->spi_bus[0].miso = 7; 200 b->spi_bus[0].sclk = 11; 201 202 b->uart_dev_count = 1; 203 b->def_uart_dev = 0; 204 b->uart_dev[0].rx = -1; 205 b->uart_dev[0].tx = -1; 206 b->uart_dev[0].device_path = "/dev/ttyS0"; 207 208 return b; 209 error: 210 syslog(LOG_CRIT, "minnowmax: Platform failed to initialise"); 211 free(b); 212 return NULL; 213 } 214
