1// Copyright 2018 The Fuchsia Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include <ddk/debug.h> 6#include <ddk/device.h> 7#include <ddk/protocol/platform-defs.h> 8#include <soc/aml-s905d2/s905d2-gpio.h> 9#include <soc/aml-s905d2/s905d2-hw.h> 10 11#include <limits.h> 12 13#include "astro.h" 14 15static const pbus_mmio_t i2c_mmios[] = { 16 { 17 .base = S905D2_I2C_AO_0_BASE, 18 .length = 0x20, 19 }, 20 { 21 .base = S905D2_I2C2_BASE, 22 .length = 0x20, 23 }, 24 { 25 .base = S905D2_I2C3_BASE, 26 .length = 0x20, 27 }, 28}; 29 30static const pbus_irq_t i2c_irqs[] = { 31 { 32 .irq = S905D2_I2C_AO_0_IRQ, 33 .mode = ZX_INTERRUPT_MODE_EDGE_HIGH, 34 }, 35 { 36 .irq = S905D2_I2C2_IRQ, 37 .mode = ZX_INTERRUPT_MODE_EDGE_HIGH, 38 }, 39 { 40 .irq = S905D2_I2C3_IRQ, 41 .mode = ZX_INTERRUPT_MODE_EDGE_HIGH, 42 }, 43}; 44 45static const pbus_dev_t i2c_dev = { 46 .name = "i2c", 47 .vid = PDEV_VID_AMLOGIC, 48 .pid = PDEV_PID_GENERIC, 49 .did = PDEV_DID_AMLOGIC_I2C, 50 .mmios = i2c_mmios, 51 .mmio_count = countof(i2c_mmios), 52 .irqs = i2c_irqs, 53 .irq_count = countof(i2c_irqs), 54}; 55 56zx_status_t aml_i2c_init(aml_bus_t* bus) { 57 // setup pinmux for our I2C busses 58 59 //i2c_ao_0 60 gpio_impl_set_alt_function(&bus->gpio, S905D2_GPIOAO(2), 1); 61 gpio_impl_set_alt_function(&bus->gpio, S905D2_GPIOAO(3), 1); 62 //i2c2 63 gpio_impl_set_alt_function(&bus->gpio, S905D2_GPIOZ(14), 3); 64 gpio_impl_set_alt_function(&bus->gpio, S905D2_GPIOZ(15), 3); 65 //i2c3 66 gpio_impl_set_alt_function(&bus->gpio, S905D2_GPIOA(14), 2); 67 gpio_impl_set_alt_function(&bus->gpio, S905D2_GPIOA(15), 2); 68 69 zx_status_t status = pbus_protocol_device_add(&bus->pbus, ZX_PROTOCOL_I2C_IMPL, &i2c_dev); 70 if (status != ZX_OK) { 71 zxlogf(ERROR, "aml_i2c_init: pbus_protocol_device_add failed: %d\n", status); 72 return status; 73 } 74 75 return ZX_OK; 76} 77