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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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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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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40 | (*riscv_console.putchar)(riscv_console.context, c); |
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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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75 | riscv_console.putchar = htif_console_putchar; |
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76 | riscv_console.getchar = htif_console_getchar; |
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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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