// Copyright 2016 by Thorsten von Eicken

// Package chip provides NextThing C.H.I.P. support.
// References:
//   http://docs.getchip.com/chip.html#chip-hardware
//   http://www.chip-community.org/index.php/Hardware_Information
//
// The following features are supported on Linux kernel 4.4+
//   GPIO (digital (rw))
//   I²C
//   SPI
// Could add LED support by following https://bbs.nextthing.co/t/pwr-and-stat-leds/748/5

package chip

import (
	"github.com/kidoman/embd"
	"github.com/kidoman/embd/host/generic"
)

var spiDeviceMinor = byte(0)

var chipPins = embd.PinMap{
	&embd.PinDesc{"XIO-P0", []string{"1016", "0", "gpio0"}, embd.CapDigital, 1016, 0},
	&embd.PinDesc{"XIO-P6", []string{"1022", "6", "gpio6"}, embd.CapDigital, 1022, 0},
	/*
		&embd.PinDesc{ID: "P1_3", Aliases: []string{"0", "GPIO_0", "SDA", "I2C0_SDA"}, Caps: embd.CapDigital | embd.CapI2C, DigitalLogical: 0},
		&embd.PinDesc{ID: "P1_5", Aliases: []string{"1", "GPIO_1", "SCL", "I2C0_SCL"}, Caps: embd.CapDigital | embd.CapI2C, DigitalLogical: 1},
		&embd.PinDesc{ID: "P1_7", Aliases: []string{"4", "GPIO_4", "GPCLK0"}, Caps: embd.CapDigital, DigitalLogical: 4},
		&embd.PinDesc{ID: "P1_8", Aliases: []string{"14", "GPIO_14", "TXD", "UART0_TXD"}, Caps: embd.CapDigital | embd.CapUART, DigitalLogical: 14},
		&embd.PinDesc{ID: "P1_10", Aliases: []string{"15", "GPIO_15", "RXD", "UART0_RXD"}, Caps: embd.CapDigital | embd.CapUART, DigitalLogical: 15},
		&embd.PinDesc{ID: "P1_11", Aliases: []string{"17", "GPIO_17"}, Caps: embd.CapDigital, DigitalLogical: 17},
		&embd.PinDesc{ID: "P1_12", Aliases: []string{"18", "GPIO_18", "PCM_CLK"}, Caps: embd.CapDigital, DigitalLogical: 18},
		&embd.PinDesc{ID: "P1_13", Aliases: []string{"21", "GPIO_21"}, Caps: embd.CapDigital, DigitalLogical: 21},
		&embd.PinDesc{ID: "P1_15", Aliases: []string{"22", "GPIO_22"}, Caps: embd.CapDigital, DigitalLogical: 22},
		&embd.PinDesc{ID: "P1_16", Aliases: []string{"23", "GPIO_23"}, Caps: embd.CapDigital, DigitalLogical: 23},
		&embd.PinDesc{ID: "P1_18", Aliases: []string{"24", "GPIO_24"}, Caps: embd.CapDigital, DigitalLogical: 24},
		&embd.PinDesc{ID: "P1_19", Aliases: []string{"10", "GPIO_10", "MOSI", "SPI0_MOSI"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 10},
		&embd.PinDesc{ID: "P1_21", Aliases: []string{"9", "GPIO_9", "MISO", "SPI0_MISO"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 9},
		&embd.PinDesc{ID: "P1_22", Aliases: []string{"25", "GPIO_25"}, Caps: embd.CapDigital, DigitalLogical: 25},
		&embd.PinDesc{ID: "P1_23", Aliases: []string{"11", "GPIO_11", "SCLK", "SPI0_SCLK"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 11},
		&embd.PinDesc{ID: "P1_24", Aliases: []string{"8", "GPIO_8", "CE0", "SPI0_CE0_N"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 8},
		&embd.PinDesc{ID: "P1_26", Aliases: []string{"7", "GPIO_7", "CE1", "SPI0_CE1_N"}, Caps: embd.CapDigital | embd.CapSPI, DigitalLogical: 7},
	*/
}

var ledMap = embd.LEDMap{
	"led0": []string{"0", "led0", "LED0"},
}

func init() {
	embd.Register(embd.HostCHIP, func(rev int) *embd.Descriptor {
		return &embd.Descriptor{
			GPIODriver: func() embd.GPIODriver {
				return embd.NewGPIODriver(chipPins, generic.NewDigitalPin, nil, nil)
			},
			I2CDriver: func() embd.I2CDriver {
				return embd.NewI2CDriver(generic.NewI2CBus)
			},
			LEDDriver: func() embd.LEDDriver {
				return embd.NewLEDDriver(ledMap, generic.NewLED)
			},
			SPIDriver: func() embd.SPIDriver {
				return embd.NewSPIDriver(spiDeviceMinor, generic.NewSPIBus, nil)
			},
		}
	})
}