Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2011 The Chromium OS Authors. |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 3 | * |
Wolfgang Denk | d79de1d | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 4 | * SPDX-License-Identifier: GPL-2.0+ |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | /* |
| 8 | * This provide a test serial port. It provides an emulated serial port where |
| 9 | * a test program and read out the serial output and inject serial input for |
| 10 | * U-Boot. |
| 11 | */ |
| 12 | |
| 13 | #include <common.h> |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 14 | #include <dm.h> |
| 15 | #include <fdtdec.h> |
Simon Glass | b9ddbf4 | 2014-02-27 13:26:19 -0700 | [diff] [blame] | 16 | #include <lcd.h> |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 17 | #include <os.h> |
Marek Vasut | 289c300 | 2012-09-14 22:33:21 +0200 | [diff] [blame] | 18 | #include <serial.h> |
Simon Glass | 38a2ae2 | 2016-01-18 19:52:25 -0700 | [diff] [blame] | 19 | #include <video.h> |
Marek Vasut | 289c300 | 2012-09-14 22:33:21 +0200 | [diff] [blame] | 20 | #include <linux/compiler.h> |
Simon Glass | 678ef47 | 2014-02-27 13:26:22 -0700 | [diff] [blame] | 21 | #include <asm/state.h> |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 22 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 23 | DECLARE_GLOBAL_DATA_PTR; |
| 24 | |
Taylor Hutt | 868aa3a | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 25 | /* |
| 26 | * |
| 27 | * serial_buf: A buffer that holds keyboard characters for the |
| 28 | * Sandbox U-boot. |
| 29 | * |
| 30 | * invariants: |
| 31 | * serial_buf_write == serial_buf_read -> empty buffer |
| 32 | * (serial_buf_write + 1) % 16 == serial_buf_read -> full buffer |
| 33 | */ |
| 34 | static char serial_buf[16]; |
| 35 | static unsigned int serial_buf_write; |
| 36 | static unsigned int serial_buf_read; |
| 37 | |
Simon Glass | 1a823a9 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 38 | struct sandbox_serial_platdata { |
| 39 | int colour; /* Text colour to use for output, -1 for none */ |
| 40 | }; |
| 41 | |
| 42 | struct sandbox_serial_priv { |
| 43 | bool start_of_line; |
| 44 | }; |
| 45 | |
| 46 | /** |
| 47 | * output_ansi_colour() - Output an ANSI colour code |
| 48 | * |
| 49 | * @colour: Colour to output (0-7) |
| 50 | */ |
| 51 | static void output_ansi_colour(int colour) |
| 52 | { |
| 53 | char ansi_code[] = "\x1b[1;3Xm"; |
| 54 | |
| 55 | ansi_code[5] = '0' + colour; |
| 56 | os_write(1, ansi_code, sizeof(ansi_code) - 1); |
| 57 | } |
| 58 | |
| 59 | static void output_ansi_reset(void) |
| 60 | { |
| 61 | os_write(1, "\x1b[0m", 4); |
| 62 | } |
| 63 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 64 | static int sandbox_serial_probe(struct udevice *dev) |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 65 | { |
Simon Glass | 678ef47 | 2014-02-27 13:26:22 -0700 | [diff] [blame] | 66 | struct sandbox_state *state = state_get_current(); |
Simon Glass | 1a823a9 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 67 | struct sandbox_serial_priv *priv = dev_get_priv(dev); |
Simon Glass | 678ef47 | 2014-02-27 13:26:22 -0700 | [diff] [blame] | 68 | |
| 69 | if (state->term_raw != STATE_TERM_COOKED) |
| 70 | os_tty_raw(0, state->term_raw == STATE_TERM_RAW_WITH_SIGS); |
Simon Glass | 1a823a9 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 71 | priv->start_of_line = 0; |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 72 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 73 | return 0; |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 74 | } |
| 75 | |
Simon Glass | 1a823a9 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 76 | static int sandbox_serial_remove(struct udevice *dev) |
| 77 | { |
| 78 | struct sandbox_serial_platdata *plat = dev->platdata; |
| 79 | |
| 80 | if (plat->colour != -1) |
| 81 | output_ansi_reset(); |
| 82 | |
| 83 | return 0; |
| 84 | } |
| 85 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 86 | static int sandbox_serial_putc(struct udevice *dev, const char ch) |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 87 | { |
Simon Glass | 1a823a9 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 88 | struct sandbox_serial_priv *priv = dev_get_priv(dev); |
| 89 | struct sandbox_serial_platdata *plat = dev->platdata; |
| 90 | |
| 91 | if (priv->start_of_line && plat->colour != -1) { |
| 92 | priv->start_of_line = false; |
| 93 | output_ansi_colour(plat->colour); |
| 94 | } |
| 95 | |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 96 | os_write(1, &ch, 1); |
Simon Glass | 1a823a9 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 97 | if (ch == '\n') |
| 98 | priv->start_of_line = true; |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 99 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 100 | return 0; |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 101 | } |
| 102 | |
Taylor Hutt | 868aa3a | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 103 | static unsigned int increment_buffer_index(unsigned int index) |
| 104 | { |
| 105 | return (index + 1) % ARRAY_SIZE(serial_buf); |
| 106 | } |
| 107 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 108 | static int sandbox_serial_pending(struct udevice *dev, bool input) |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 109 | { |
Taylor Hutt | 868aa3a | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 110 | const unsigned int next_index = |
| 111 | increment_buffer_index(serial_buf_write); |
Mike Frysinger | d174fd9 | 2011-10-26 00:21:01 +0000 | [diff] [blame] | 112 | ssize_t count; |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 113 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 114 | if (!input) |
| 115 | return 0; |
| 116 | |
Taylor Hutt | 868aa3a | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 117 | os_usleep(100); |
Simon Glass | 38a2ae2 | 2016-01-18 19:52:25 -0700 | [diff] [blame] | 118 | video_sync_all(); |
Taylor Hutt | 868aa3a | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 119 | if (next_index == serial_buf_read) |
| 120 | return 1; /* buffer full */ |
| 121 | |
| 122 | count = os_read_no_block(0, &serial_buf[serial_buf_write], 1); |
| 123 | if (count == 1) |
| 124 | serial_buf_write = next_index; |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 125 | |
Taylor Hutt | 868aa3a | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 126 | return serial_buf_write != serial_buf_read; |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 127 | } |
| 128 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 129 | static int sandbox_serial_getc(struct udevice *dev) |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 130 | { |
Taylor Hutt | 868aa3a | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 131 | int result; |
| 132 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 133 | if (!sandbox_serial_pending(dev, true)) |
| 134 | return -EAGAIN; /* buffer empty */ |
Taylor Hutt | 868aa3a | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 135 | |
| 136 | result = serial_buf[serial_buf_read]; |
| 137 | serial_buf_read = increment_buffer_index(serial_buf_read); |
| 138 | return result; |
Simon Glass | 479349a | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 139 | } |
Marek Vasut | 289c300 | 2012-09-14 22:33:21 +0200 | [diff] [blame] | 140 | |
Simon Glass | 1a823a9 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 141 | static const char * const ansi_colour[] = { |
| 142 | "black", "red", "green", "yellow", "blue", "megenta", "cyan", |
| 143 | "white", |
| 144 | }; |
| 145 | |
| 146 | static int sandbox_serial_ofdata_to_platdata(struct udevice *dev) |
| 147 | { |
| 148 | struct sandbox_serial_platdata *plat = dev->platdata; |
| 149 | const char *colour; |
| 150 | int i; |
| 151 | |
| 152 | plat->colour = -1; |
| 153 | colour = fdt_getprop(gd->fdt_blob, dev->of_offset, |
| 154 | "sandbox,text-colour", NULL); |
| 155 | if (colour) { |
| 156 | for (i = 0; i < ARRAY_SIZE(ansi_colour); i++) { |
| 157 | if (!strcmp(colour, ansi_colour[i])) { |
| 158 | plat->colour = i; |
| 159 | break; |
| 160 | } |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | return 0; |
| 165 | } |
| 166 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 167 | static const struct dm_serial_ops sandbox_serial_ops = { |
| 168 | .putc = sandbox_serial_putc, |
| 169 | .pending = sandbox_serial_pending, |
| 170 | .getc = sandbox_serial_getc, |
Marek Vasut | 289c300 | 2012-09-14 22:33:21 +0200 | [diff] [blame] | 171 | }; |
| 172 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 173 | static const struct udevice_id sandbox_serial_ids[] = { |
| 174 | { .compatible = "sandbox,serial" }, |
| 175 | { } |
| 176 | }; |
Marek Vasut | 289c300 | 2012-09-14 22:33:21 +0200 | [diff] [blame] | 177 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 178 | U_BOOT_DRIVER(serial_sandbox) = { |
| 179 | .name = "serial_sandbox", |
| 180 | .id = UCLASS_SERIAL, |
| 181 | .of_match = sandbox_serial_ids, |
Simon Glass | 1a823a9 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 182 | .ofdata_to_platdata = sandbox_serial_ofdata_to_platdata, |
| 183 | .platdata_auto_alloc_size = sizeof(struct sandbox_serial_platdata), |
| 184 | .priv_auto_alloc_size = sizeof(struct sandbox_serial_priv), |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 185 | .probe = sandbox_serial_probe, |
Simon Glass | 1a823a9 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 186 | .remove = sandbox_serial_remove, |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 187 | .ops = &sandbox_serial_ops, |
| 188 | .flags = DM_FLAG_PRE_RELOC, |
| 189 | }; |
| 190 | |
Simon Glass | 1a823a9 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 191 | static const struct sandbox_serial_platdata platdata_non_fdt = { |
| 192 | .colour = -1, |
| 193 | }; |
| 194 | |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 195 | U_BOOT_DEVICE(serial_sandbox_non_fdt) = { |
| 196 | .name = "serial_sandbox", |
Simon Glass | 1a823a9 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 197 | .platdata = &platdata_non_fdt, |
Simon Glass | e587069 | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 198 | }; |