[1232cd46] | 1 | /* |
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| 2 | * Copyright (c) 2018 embedded brains GmbH. All rights reserved. |
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| 3 | * |
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| 4 | * embedded brains GmbH |
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| 5 | * Dornierstr. 4 |
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| 6 | * 82178 Puchheim |
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| 7 | * Germany |
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| 8 | * <info@embedded-brains.de> |
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| 9 | * |
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| 10 | * The license and distribution terms for this file may be |
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| 11 | * found in the file LICENSE in this distribution or at |
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| 12 | * http://www.rtems.org/license/LICENSE. |
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| 13 | */ |
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| 14 | |
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| 15 | #include <rtems/bspIo.h> |
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| 16 | #include <rtems/console.h> |
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| 17 | #include <rtems/sysinit.h> |
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| 18 | #include <rtems/termiostypes.h> |
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| 19 | |
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| 20 | #include <bsp.h> |
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| 21 | #include <bsp/fdt.h> |
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| 22 | #include <bsp/irq.h> |
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| 23 | |
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| 24 | #include <dev/serial/htif.h> |
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| 25 | |
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| 26 | #include <libfdt.h> |
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| 27 | |
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| 28 | #if RISCV_ENABLE_HTIF_SUPPORT > 0 |
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| 29 | static htif_console_context htif_console_instance; |
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| 30 | #endif |
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| 31 | |
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| 32 | static struct { |
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| 33 | rtems_termios_device_context *context; |
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[31f90a2] | 34 | void (*putchar)(rtems_termios_device_context *base, char c); |
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| 35 | int (*getchar)(rtems_termios_device_context *base); |
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[1232cd46] | 36 | } riscv_console; |
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| 37 | |
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| 38 | static void riscv_output_char(char c) |
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| 39 | { |
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[31f90a2] | 40 | (*riscv_console.putchar)(riscv_console.context, c); |
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[1232cd46] | 41 | } |
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| 42 | |
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| 43 | static int riscv_get_console_node(const void *fdt) |
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| 44 | { |
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| 45 | const char *stdout_path; |
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| 46 | int node; |
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| 47 | |
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| 48 | node = fdt_path_offset(fdt, "/chosen"); |
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| 49 | |
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| 50 | stdout_path = fdt_getprop(fdt, node, "stdout-path", NULL); |
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| 51 | if (stdout_path == NULL) { |
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| 52 | stdout_path = ""; |
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| 53 | } |
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| 54 | |
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| 55 | return fdt_path_offset(fdt, stdout_path); |
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| 56 | } |
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| 57 | |
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| 58 | static void riscv_console_probe(void) |
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| 59 | { |
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| 60 | const void *fdt; |
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| 61 | int node; |
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| 62 | int console_node; |
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| 63 | |
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| 64 | fdt = bsp_fdt_get(); |
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| 65 | console_node = riscv_get_console_node(fdt); |
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| 66 | |
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| 67 | node = fdt_next_node(fdt, -1, NULL); |
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| 68 | |
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| 69 | while (node >= 0) { |
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| 70 | #if RISCV_ENABLE_HTIF_SUPPORT |
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| 71 | if (fdt_node_check_compatible(fdt, node, "ucb,htif0") == 0) { |
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| 72 | htif_console_context_init(&htif_console_instance.base, node); |
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| 73 | |
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| 74 | riscv_console.context = &htif_console_instance.base; |
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[31f90a2] | 75 | riscv_console.putchar = htif_console_putchar; |
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| 76 | riscv_console.getchar = htif_console_getchar; |
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[1232cd46] | 77 | }; |
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| 78 | #endif |
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| 79 | |
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| 80 | node = fdt_next_node(fdt, node, NULL); |
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| 81 | } |
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| 82 | |
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| 83 | BSP_output_char = riscv_output_char; |
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| 84 | } |
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| 85 | |
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| 86 | static void riscv_output_char_init(char c) |
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| 87 | { |
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| 88 | riscv_console_probe(); |
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| 89 | riscv_output_char(c); |
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| 90 | } |
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| 91 | |
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| 92 | BSP_output_char_function_type BSP_output_char = riscv_output_char_init; |
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| 93 | |
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| 94 | BSP_polling_getchar_function_type BSP_poll_char = NULL; |
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| 95 | |
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| 96 | rtems_status_code console_initialize( |
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| 97 | rtems_device_major_number major, |
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| 98 | rtems_device_minor_number minor, |
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| 99 | void *arg |
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| 100 | ) |
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| 101 | { |
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| 102 | rtems_termios_device_context *base; |
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| 103 | char htif_path[] = "/dev/ttyShtif"; |
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| 104 | |
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| 105 | rtems_termios_initialize(); |
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| 106 | |
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| 107 | #if RISCV_ENABLE_HTIF_SUPPORT |
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| 108 | base = &htif_console_instance.base; |
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| 109 | rtems_termios_device_install(htif_path, &htif_console_handler, NULL, base); |
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| 110 | |
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| 111 | if (base == riscv_console.context) { |
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| 112 | link(htif_path, CONSOLE_DEVICE_NAME); |
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| 113 | } |
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| 114 | #endif |
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| 115 | |
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| 116 | return RTEMS_SUCCESSFUL; |
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| 117 | } |
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| 118 | |
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| 119 | RTEMS_SYSINIT_ITEM( |
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| 120 | riscv_console_probe, |
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| 121 | RTEMS_SYSINIT_BSP_START, |
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| 122 | RTEMS_SYSINIT_ORDER_LAST |
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| 123 | ); |
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