1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup RTEMSBSPsPowerPCQorIQ |
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5 | * |
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6 | * @brief Console configuration. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2010, 2017 embedded brains GmbH. All rights reserved. |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #include <string.h> |
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18 | |
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19 | #include <libfdt.h> |
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20 | |
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21 | #include <rtems/bspIo.h> |
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22 | |
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23 | #include <libchip/ns16550.h> |
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24 | |
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25 | #include <asm/epapr_hcalls.h> |
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26 | |
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27 | #include <bsp.h> |
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28 | #include <bsp/fdt.h> |
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29 | #include <bsp/irq.h> |
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30 | #include <bsp/qoriq.h> |
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31 | #include <bsp/intercom.h> |
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32 | #include <bsp/uart-bridge.h> |
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33 | #include <bsp/console-termios.h> |
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34 | |
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35 | static void output_char(char c); |
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36 | |
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37 | #ifdef QORIQ_IS_HYPERVISOR_GUEST |
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38 | typedef struct { |
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39 | rtems_termios_device_context base; |
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40 | uint32_t handle; |
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41 | } qoriq_bc_context; |
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42 | |
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43 | static bool qoriq_bc_probe(rtems_termios_device_context *base) |
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44 | { |
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45 | qoriq_bc_context *ctx; |
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46 | const void *fdt; |
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47 | int node; |
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48 | const uint32_t *handle; |
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49 | int len; |
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50 | |
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51 | fdt = bsp_fdt_get(); |
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52 | |
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53 | node = fdt_node_offset_by_compatible(fdt, -1, "epapr,hv-byte-channel"); |
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54 | if (node < 0) { |
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55 | return false; |
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56 | } |
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57 | |
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58 | handle = fdt_getprop(fdt, node, "hv-handle", &len); |
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59 | if (handle == NULL || len != 4) { |
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60 | return false; |
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61 | } |
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62 | |
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63 | ctx = (qoriq_bc_context *) base; |
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64 | ctx->handle = fdt32_to_cpu(*handle); |
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65 | |
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66 | BSP_output_char = output_char; |
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67 | return true; |
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68 | } |
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69 | |
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70 | static int qoriq_bc_read_polled(rtems_termios_device_context *base) |
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71 | { |
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72 | qoriq_bc_context *ctx; |
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73 | char buf[EV_BYTE_CHANNEL_MAX_BYTES]; |
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74 | unsigned int count; |
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75 | unsigned int status; |
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76 | |
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77 | ctx = (qoriq_bc_context *) base; |
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78 | count = 1; |
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79 | status = ev_byte_channel_receive(ctx->handle, &count, buf); |
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80 | |
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81 | if (status != EV_SUCCESS || count == 0) { |
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82 | return -1; |
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83 | } |
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84 | |
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85 | return (unsigned char) buf[0]; |
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86 | } |
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87 | |
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88 | static void qoriq_bc_write_polled( |
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89 | rtems_termios_device_context *base, |
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90 | const char *buf, |
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91 | size_t len |
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92 | ) |
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93 | { |
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94 | qoriq_bc_context *ctx; |
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95 | uint32_t handle; |
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96 | |
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97 | ctx = (qoriq_bc_context *) base; |
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98 | handle = ctx->handle; |
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99 | |
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100 | while (len > 0) { |
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101 | unsigned int count; |
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102 | unsigned int status; |
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103 | char buf2[EV_BYTE_CHANNEL_MAX_BYTES]; |
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104 | const char *out; |
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105 | |
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106 | if (len < EV_BYTE_CHANNEL_MAX_BYTES) { |
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107 | count = len; |
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108 | out = memcpy(buf2, buf, len); |
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109 | } else { |
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110 | count = EV_BYTE_CHANNEL_MAX_BYTES; |
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111 | out = buf; |
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112 | } |
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113 | |
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114 | status = ev_byte_channel_send(handle, &count, out); |
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115 | |
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116 | if (status == EV_SUCCESS) { |
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117 | len -= count; |
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118 | buf += count; |
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119 | } |
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120 | } |
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121 | } |
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122 | |
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123 | static const rtems_termios_device_handler qoriq_bc_handler_polled = { |
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124 | .poll_read = qoriq_bc_read_polled, |
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125 | .write = qoriq_bc_write_polled, |
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126 | .mode = TERMIOS_POLLED |
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127 | }; |
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128 | |
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129 | static qoriq_bc_context qoriq_bc_context_0 = { |
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130 | .base = RTEMS_TERMIOS_DEVICE_CONTEXT_INITIALIZER("BC 0"), |
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131 | }; |
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132 | #endif /* QORIQ_IS_HYPERVISOR_GUEST */ |
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133 | |
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134 | #if (QORIQ_UART_0_ENABLE + QORIQ_UART_BRIDGE_0_ENABLE == 2) \ |
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135 | || (QORIQ_UART_1_ENABLE + QORIQ_UART_BRIDGE_1_ENABLE == 2) |
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136 | #define BRIDGE_MASTER |
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137 | #elif QORIQ_UART_BRIDGE_0_ENABLE || QORIQ_UART_BRIDGE_1_ENABLE |
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138 | #define BRIDGE_SLAVE |
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139 | #endif |
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140 | |
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141 | #ifdef BSP_USE_UART_INTERRUPTS |
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142 | #define DEVICE_FNS &ns16550_handler_interrupt |
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143 | #else |
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144 | #define DEVICE_FNS &ns16550_handler_polled |
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145 | #endif |
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146 | |
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147 | #if QORIQ_UART_0_ENABLE || QORIQ_UART_1_ENABLE |
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148 | static bool uart_probe(rtems_termios_device_context *base) |
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149 | { |
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150 | ns16550_context *ctx = (ns16550_context *) base; |
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151 | |
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152 | ctx->clock = BSP_bus_frequency; |
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153 | |
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154 | return ns16550_probe(base); |
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155 | } |
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156 | |
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157 | static uint8_t get_register(uintptr_t addr, uint8_t i) |
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158 | { |
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159 | volatile uint8_t *reg = (uint8_t *) addr; |
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160 | |
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161 | return reg [i]; |
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162 | } |
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163 | |
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164 | static void set_register(uintptr_t addr, uint8_t i, uint8_t val) |
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165 | { |
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166 | volatile uint8_t *reg = (uint8_t *) addr; |
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167 | |
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168 | reg [i] = val; |
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169 | } |
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170 | #endif |
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171 | |
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172 | #if QORIQ_UART_0_ENABLE |
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173 | static ns16550_context qoriq_uart_context_0 = { |
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174 | .base = RTEMS_TERMIOS_DEVICE_CONTEXT_INITIALIZER("UART 0"), |
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175 | .get_reg = get_register, |
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176 | .set_reg = set_register, |
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177 | .port = (uintptr_t) &qoriq.uart_0, |
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178 | .irq = QORIQ_IRQ_DUART_1, |
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179 | .initial_baud = BSP_CONSOLE_BAUD |
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180 | }; |
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181 | #endif |
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182 | |
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183 | #if QORIQ_UART_1_ENABLE |
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184 | static ns16550_context qoriq_uart_context_1 = { |
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185 | .base = RTEMS_TERMIOS_DEVICE_CONTEXT_INITIALIZER("UART 1"), |
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186 | .get_reg = get_register, |
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187 | .set_reg = set_register, |
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188 | .port = (uintptr_t) &qoriq.uart_1, |
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189 | .irq = QORIQ_IRQ_DUART_1, |
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190 | .initial_baud = BSP_CONSOLE_BAUD |
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191 | }; |
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192 | #endif |
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193 | |
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194 | #ifdef BRIDGE_MASTER |
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195 | #define BRIDGE_PROBE qoriq_uart_bridge_master_probe |
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196 | #define BRIDGE_FNS &qoriq_uart_bridge_master |
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197 | #if QORIQ_UART_BRIDGE_0_ENABLE |
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198 | static uart_bridge_master_context bridge_0_context = { |
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199 | .base = RTEMS_TERMIOS_DEVICE_CONTEXT_INITIALIZER("UART Bridge 0"), |
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200 | .device_path = "/dev/ttyS0", |
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201 | .type = INTERCOM_TYPE_UART_0, |
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202 | .transmit_fifo = RTEMS_CHAIN_INITIALIZER_EMPTY( |
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203 | bridge_0_context.transmit_fifo |
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204 | ) |
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205 | }; |
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206 | #define BRIDGE_0_CONTEXT &bridge_0_context.base |
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207 | #endif |
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208 | #if QORIQ_UART_BRIDGE_1_ENABLE |
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209 | static uart_bridge_master_context bridge_1_context = { |
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210 | .base = RTEMS_TERMIOS_DEVICE_CONTEXT_INITIALIZER("UART Bridge 1"), |
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211 | .device_path = "/dev/ttyS1", |
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212 | .type = INTERCOM_TYPE_UART_1, |
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213 | .transmit_fifo = RTEMS_CHAIN_INITIALIZER_EMPTY( |
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214 | bridge_1_context.transmit_fifo |
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215 | ) |
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216 | }; |
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217 | #define BRIDGE_1_CONTEXT &bridge_1_context.base |
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218 | #endif |
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219 | #endif |
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220 | |
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221 | #ifdef BRIDGE_SLAVE |
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222 | #define BRIDGE_PROBE console_device_probe_default |
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223 | #define BRIDGE_FNS &qoriq_uart_bridge_slave |
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224 | #if QORIQ_UART_BRIDGE_0_ENABLE |
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225 | static uart_bridge_slave_context bridge_0_context = { |
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226 | .base = RTEMS_TERMIOS_DEVICE_CONTEXT_INITIALIZER("UART Bridge 0"), |
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227 | .type = INTERCOM_TYPE_UART_0, |
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228 | .transmit_fifo = RTEMS_CHAIN_INITIALIZER_EMPTY( |
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229 | bridge_0_context.transmit_fifo |
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230 | ) |
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231 | }; |
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232 | #define BRIDGE_0_CONTEXT &bridge_0_context.base |
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233 | #endif |
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234 | #if QORIQ_UART_BRIDGE_1_ENABLE |
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235 | static uart_bridge_slave_context bridge_1_context = { |
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236 | .base = RTEMS_TERMIOS_DEVICE_CONTEXT_INITIALIZER("UART Bridge 1"), |
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237 | .type = INTERCOM_TYPE_UART_1, |
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238 | .transmit_fifo = RTEMS_CHAIN_INITIALIZER_EMPTY( |
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239 | bridge_1_context.transmit_fifo |
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240 | ) |
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241 | }; |
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242 | #define BRIDGE_1_CONTEXT &bridge_1_context.base |
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243 | #endif |
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244 | #endif |
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245 | |
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246 | const console_device console_device_table[] = { |
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247 | #ifdef QORIQ_IS_HYPERVISOR_GUEST |
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248 | { |
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249 | .device_file = "/dev/ttyBC0", |
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250 | .probe = qoriq_bc_probe, |
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251 | .handler = &qoriq_bc_handler_polled, |
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252 | .context = &qoriq_bc_context_0.base |
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253 | }, |
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254 | #endif |
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255 | #if QORIQ_UART_0_ENABLE |
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256 | { |
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257 | .device_file = "/dev/ttyS0", |
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258 | .probe = uart_probe, |
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259 | .handler = DEVICE_FNS, |
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260 | .context = &qoriq_uart_context_0.base |
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261 | }, |
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262 | #endif |
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263 | #if QORIQ_UART_1_ENABLE |
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264 | { |
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265 | .device_file = "/dev/ttyS1", |
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266 | .probe = uart_probe, |
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267 | .handler = DEVICE_FNS, |
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268 | .context = &qoriq_uart_context_1.base |
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269 | }, |
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270 | #endif |
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271 | #if QORIQ_UART_BRIDGE_0_ENABLE |
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272 | { |
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273 | #if QORIQ_UART_1_ENABLE |
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274 | .device_file = "/dev/ttyB0", |
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275 | #else |
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276 | .device_file = "/dev/ttyS0", |
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277 | #endif |
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278 | .probe = BRIDGE_PROBE, |
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279 | .handler = BRIDGE_FNS, |
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280 | .context = BRIDGE_0_CONTEXT |
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281 | }, |
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282 | #endif |
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283 | #if QORIQ_UART_BRIDGE_1_ENABLE |
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284 | { |
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285 | #if QORIQ_UART_1_ENABLE |
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286 | .device_file = "/dev/ttyB1", |
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287 | #else |
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288 | .device_file = "/dev/ttyS1", |
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289 | #endif |
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290 | .probe = BRIDGE_PROBE, |
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291 | .handler = BRIDGE_FNS, |
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292 | .context = BRIDGE_1_CONTEXT |
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293 | } |
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294 | #endif |
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295 | }; |
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296 | |
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297 | const size_t console_device_count = RTEMS_ARRAY_SIZE(console_device_table); |
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298 | |
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299 | static void output_char(char c) |
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300 | { |
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301 | rtems_termios_device_context *base = console_device_table[0].context; |
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302 | |
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303 | #ifdef QORIQ_IS_HYPERVISOR_GUEST |
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304 | qoriq_bc_write_polled(base, &c, 1); |
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305 | #else |
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306 | ns16550_polled_putchar(base, c); |
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307 | #endif |
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308 | } |
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309 | |
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310 | #ifdef QORIQ_IS_HYPERVISOR_GUEST |
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311 | static void qoriq_bc_output_char_init(char c) |
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312 | { |
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313 | rtems_termios_device_context *base = console_device_table[0].context; |
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314 | |
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315 | qoriq_bc_probe(base); |
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316 | output_char(c); |
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317 | } |
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318 | |
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319 | BSP_output_char_function_type BSP_output_char = qoriq_bc_output_char_init; |
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320 | #else |
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321 | BSP_output_char_function_type BSP_output_char = output_char; |
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322 | #endif |
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323 | |
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324 | BSP_polling_getchar_function_type BSP_poll_char = NULL; |
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