1  /* code to generate common GPIO code for Intel 6/7/8 Series Chipset */
  2  
  3  package main
  4  
  5  import (
  6  	"fmt"
  7  	"os"
  8  )
  9  
 10  func writeGPIOSet(ctx Context, sb *os.File,
 11  	val uint32, set uint, partno int, constraint uint32) {
 12  
 13  	max := uint(32)
 14  	if set == 3 {
 15  		max = 12
 16  	}
 17  
 18  	bits := [6][2]string{
 19  		{"GPIO_MODE_NATIVE", "GPIO_MODE_GPIO"},
 20  		{"GPIO_DIR_OUTPUT", "GPIO_DIR_INPUT"},
 21  		{"GPIO_LEVEL_LOW", "GPIO_LEVEL_HIGH"},
 22  		{"GPIO_RESET_PWROK", "GPIO_RESET_RSMRST"},
 23  		{"GPIO_NO_INVERT", "GPIO_INVERT"},
 24  		{"GPIO_NO_BLINK", "GPIO_BLINK"},
 25  	}
 26  
 27  	for i := uint(0); i < max; i++ {
 28  		if (constraint>>i)&1 == 1 {
 29  			fmt.Fprintf(sb, "	.gpio%d = %s,\n",
 30  				(set-1)*32+i,
 31  				bits[partno][(val>>i)&1])
 32  		}
 33  	}
 34  }
 35  
 36  func GPIO(ctx Context, inteltool InteltoolData) {
 37  	var constraint uint32
 38  	gpio := Create(ctx, "gpio.c")
 39  	defer gpio.Close()
 40  
 41  	AddBootBlockFile("gpio.c", "")
 42  	AddROMStageFile("gpio.c", "")
 43  
 44  	Add_SPDX(gpio, C, GPL2_only)
 45  	gpio.WriteString("#include <southbridge/intel/common/gpio.h>\n\n")
 46  
 47  	addresses := [3][6]int{
 48  		{0x00, 0x04, 0x0c, 0x60, 0x2c, 0x18},
 49  		{0x30, 0x34, 0x38, 0x64, -1, -1},
 50  		{0x40, 0x44, 0x48, 0x68, -1, -1},
 51  	}
 52  
 53  	for set := 1; set <= 3; set++ {
 54  		for partno, part := range []string{"mode", "direction", "level", "reset", "invert", "blink"} {
 55  			addr := addresses[set-1][partno]
 56  			if addr < 0 {
 57  				continue
 58  			}
 59  			fmt.Fprintf(gpio, "static const struct pch_gpio_set%d pch_gpio_set%d_%s = {\n",
 60  				set, set, part)
 61  
 62  			constraint = 0xffffffff
 63  			switch part {
 64  			case "direction":
 65  				/* Ignored on native mode */
 66  				constraint = inteltool.GPIO[uint16(addresses[set-1][0])]
 67  			case "level":
 68  				/* Level doesn't matter for input */
 69  				constraint = inteltool.GPIO[uint16(addresses[set-1][0])]
 70  				constraint &^= inteltool.GPIO[uint16(addresses[set-1][1])]
 71  			case "reset":
 72  				/* Only show reset */
 73  				constraint = inteltool.GPIO[uint16(addresses[set-1][3])]
 74  			case "invert":
 75  				/* Only on input and only show inverted GPIO */
 76  				constraint = inteltool.GPIO[uint16(addresses[set-1][0])]
 77  				constraint &= inteltool.GPIO[uint16(addresses[set-1][1])]
 78  				constraint &= inteltool.GPIO[uint16(addresses[set-1][4])]
 79  			case "blink":
 80  				/* Only on output and only show blinking GPIO */
 81  				constraint = inteltool.GPIO[uint16(addresses[set-1][0])]
 82  				constraint &^= inteltool.GPIO[uint16(addresses[set-1][1])]
 83  				constraint &= inteltool.GPIO[uint16(addresses[set-1][5])]
 84  			}
 85  			writeGPIOSet(ctx, gpio, inteltool.GPIO[uint16(addr)], uint(set), partno, constraint)
 86  			gpio.WriteString("};\n\n")
 87  		}
 88  	}
 89  
 90  	gpio.WriteString(`const struct pch_gpio_map mainboard_gpio_map = {
 91  	.set1 = {
 92  		.mode		= &pch_gpio_set1_mode,
 93  		.direction	= &pch_gpio_set1_direction,
 94  		.level		= &pch_gpio_set1_level,
 95  		.blink		= &pch_gpio_set1_blink,
 96  		.invert		= &pch_gpio_set1_invert,
 97  		.reset		= &pch_gpio_set1_reset,
 98  	},
 99  	.set2 = {
100  		.mode		= &pch_gpio_set2_mode,
101  		.direction	= &pch_gpio_set2_direction,
102  		.level		= &pch_gpio_set2_level,
103  		.reset		= &pch_gpio_set2_reset,
104  	},
105  	.set3 = {
106  		.mode		= &pch_gpio_set3_mode,
107  		.direction	= &pch_gpio_set3_direction,
108  		.level		= &pch_gpio_set3_level,
109  		.reset		= &pch_gpio_set3_reset,
110  	},
111  };
112  `)
113  }