1/* 2 * Copyright 2018, Data61 3 * Commonwealth Scientific and Industrial Research Organisation (CSIRO) 4 * ABN 41 687 119 230. 5 * 6 * This software may be distributed and modified according to the terms of 7 * the BSD 2-Clause license. Note that NO WARRANTY is provided. 8 * See "LICENSE_BSD2.txt" for details. 9 * 10 * @TAG(DATA61_BSD) 11 */ 12#include <stdio.h> 13#include <stdint.h> 14 15#include <camkes.h> 16#include <camkes/io.h> 17#include <sel4/sel4.h> 18#include <utils/attribute.h> 19#include <utils/ansi.h> 20 21#include "plat.h" 22 23struct ps_chardevice serial_device; 24struct ps_chardevice *serial = NULL; 25 26ssize_t plat_serial_write(void *buf, size_t buf_size, chardev_callback_t cb, void *token) 27{ 28 ssize_t res = ps_cdev_write(serial, buf, buf_size, cb, token); 29 return res; 30} 31 32ssize_t plat_serial_read(void *buf, size_t buf_size, chardev_callback_t cb, void *token) 33{ 34 ssize_t res = ps_cdev_read(serial, buf, buf_size, cb, token); 35 return res; 36} 37 38void plat_serial_interrupt(handle_char_fn handle_char) 39{ 40 if (serial) { 41 int data = 0; 42 ps_cdev_handle_irq(serial, 0); 43 while (data != EOF) { 44 data = ps_cdev_getchar(serial); 45 if (data != EOF) { 46 handle_char((uint8_t)data); 47 } 48 } 49 } 50} 51 52void plat_serial_putchar(int c) 53{ 54 if (serial) { 55 ps_cdev_putchar(serial, c); 56 } 57} 58 59void plat_pre_init(ps_io_ops_t *io_ops) 60{ 61 ZF_LOGF_IF(io_ops == NULL, "Was passed an empty IO ops struct"); 62 63#ifdef CONFIG_PLAT_EXYNOS5 64 io_ops->clock_sys.priv = NULL; 65 io_ops->mux_sys.priv = NULL; 66#endif 67 68 serial = ps_cdev_init(PS_SERIAL_DEFAULT, io_ops, &serial_device); 69 if (serial == NULL) { 70 ZF_LOGE("Failed to initialise character device"); 71 } 72} 73