Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2011 The Chromium OS Authors. |
Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 3 | * |
Wolfgang Denk | 1a45966 | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 4 | * SPDX-License-Identifier: GPL-2.0+ |
Simon Glass | 7accb6e | 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 | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 14 | #include <dm.h> |
| 15 | #include <fdtdec.h> |
Simon Glass | 7d95f2a | 2014-02-27 13:26:19 -0700 | [diff] [blame] | 16 | #include <lcd.h> |
Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 17 | #include <os.h> |
Marek Vasut | cef46b7 | 2012-09-14 22:33:21 +0200 | [diff] [blame] | 18 | #include <serial.h> |
Simon Glass | 3ade5bc | 2016-01-18 19:52:25 -0700 | [diff] [blame] | 19 | #include <video.h> |
Marek Vasut | cef46b7 | 2012-09-14 22:33:21 +0200 | [diff] [blame] | 20 | #include <linux/compiler.h> |
Simon Glass | ffb8790 | 2014-02-27 13:26:22 -0700 | [diff] [blame] | 21 | #include <asm/state.h> |
Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 22 | |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 23 | DECLARE_GLOBAL_DATA_PTR; |
| 24 | |
Taylor Hutt | e101550 | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 25 | /* |
| 26 | * |
| 27 | * serial_buf: A buffer that holds keyboard characters for the |
Bin Meng | a187559 | 2016-02-05 19:30:11 -0800 | [diff] [blame] | 28 | * Sandbox U-Boot. |
Taylor Hutt | e101550 | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 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 | 72e9822 | 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 | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 64 | static int sandbox_serial_probe(struct udevice *dev) |
Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 65 | { |
Simon Glass | ffb8790 | 2014-02-27 13:26:22 -0700 | [diff] [blame] | 66 | struct sandbox_state *state = state_get_current(); |
Simon Glass | 72e9822 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 67 | struct sandbox_serial_priv *priv = dev_get_priv(dev); |
Simon Glass | ffb8790 | 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 | 72e9822 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 71 | priv->start_of_line = 0; |
| 72 | |
| 73 | return 0; |
| 74 | } |
| 75 | |
| 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(); |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 82 | |
Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 83 | return 0; |
| 84 | } |
| 85 | |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 86 | static int sandbox_serial_putc(struct udevice *dev, const char ch) |
Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 87 | { |
Simon Glass | 72e9822 | 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 | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 96 | os_write(1, &ch, 1); |
Simon Glass | 72e9822 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 97 | if (ch == '\n') |
| 98 | priv->start_of_line = true; |
Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 99 | |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 100 | return 0; |
Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 101 | } |
| 102 | |
Taylor Hutt | e101550 | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 103 | static unsigned int increment_buffer_index(unsigned int index) |
Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 104 | { |
Taylor Hutt | e101550 | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 105 | return (index + 1) % ARRAY_SIZE(serial_buf); |
Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 106 | } |
| 107 | |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 108 | static int sandbox_serial_pending(struct udevice *dev, bool input) |
Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 109 | { |
Taylor Hutt | e101550 | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 110 | const unsigned int next_index = |
| 111 | increment_buffer_index(serial_buf_write); |
| 112 | ssize_t count; |
| 113 | |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 114 | if (!input) |
| 115 | return 0; |
| 116 | |
Taylor Hutt | e101550 | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 117 | os_usleep(100); |
Simon Glass | 0110f50 | 2016-07-04 11:57:53 -0600 | [diff] [blame] | 118 | #ifndef CONFIG_SPL_BUILD |
Simon Glass | 3ade5bc | 2016-01-18 19:52:25 -0700 | [diff] [blame] | 119 | video_sync_all(); |
Simon Glass | 0110f50 | 2016-07-04 11:57:53 -0600 | [diff] [blame] | 120 | #endif |
Taylor Hutt | e101550 | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 121 | if (next_index == serial_buf_read) |
| 122 | return 1; /* buffer full */ |
| 123 | |
| 124 | count = os_read_no_block(0, &serial_buf[serial_buf_write], 1); |
| 125 | if (count == 1) |
| 126 | serial_buf_write = next_index; |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 127 | |
Taylor Hutt | e101550 | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 128 | return serial_buf_write != serial_buf_read; |
| 129 | } |
| 130 | |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 131 | static int sandbox_serial_getc(struct udevice *dev) |
Taylor Hutt | e101550 | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 132 | { |
| 133 | int result; |
| 134 | |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 135 | if (!sandbox_serial_pending(dev, true)) |
| 136 | return -EAGAIN; /* buffer empty */ |
Taylor Hutt | e101550 | 2013-02-24 17:33:13 +0000 | [diff] [blame] | 137 | |
| 138 | result = serial_buf[serial_buf_read]; |
| 139 | serial_buf_read = increment_buffer_index(serial_buf_read); |
| 140 | return result; |
Simon Glass | 7accb6e | 2011-10-03 19:26:46 +0000 | [diff] [blame] | 141 | } |
Marek Vasut | cef46b7 | 2012-09-14 22:33:21 +0200 | [diff] [blame] | 142 | |
Simon Glass | 72e9822 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 143 | static const char * const ansi_colour[] = { |
| 144 | "black", "red", "green", "yellow", "blue", "megenta", "cyan", |
| 145 | "white", |
| 146 | }; |
| 147 | |
| 148 | static int sandbox_serial_ofdata_to_platdata(struct udevice *dev) |
| 149 | { |
| 150 | struct sandbox_serial_platdata *plat = dev->platdata; |
| 151 | const char *colour; |
| 152 | int i; |
| 153 | |
| 154 | plat->colour = -1; |
Simon Glass | e160f7d | 2017-01-17 16:52:55 -0700 | [diff] [blame] | 155 | colour = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), |
Simon Glass | 72e9822 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 156 | "sandbox,text-colour", NULL); |
| 157 | if (colour) { |
| 158 | for (i = 0; i < ARRAY_SIZE(ansi_colour); i++) { |
| 159 | if (!strcmp(colour, ansi_colour[i])) { |
| 160 | plat->colour = i; |
| 161 | break; |
| 162 | } |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | return 0; |
| 167 | } |
| 168 | |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 169 | static const struct dm_serial_ops sandbox_serial_ops = { |
| 170 | .putc = sandbox_serial_putc, |
| 171 | .pending = sandbox_serial_pending, |
| 172 | .getc = sandbox_serial_getc, |
Marek Vasut | cef46b7 | 2012-09-14 22:33:21 +0200 | [diff] [blame] | 173 | }; |
| 174 | |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 175 | static const struct udevice_id sandbox_serial_ids[] = { |
| 176 | { .compatible = "sandbox,serial" }, |
| 177 | { } |
| 178 | }; |
Marek Vasut | cef46b7 | 2012-09-14 22:33:21 +0200 | [diff] [blame] | 179 | |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 180 | U_BOOT_DRIVER(serial_sandbox) = { |
| 181 | .name = "serial_sandbox", |
| 182 | .id = UCLASS_SERIAL, |
| 183 | .of_match = sandbox_serial_ids, |
Simon Glass | 72e9822 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 184 | .ofdata_to_platdata = sandbox_serial_ofdata_to_platdata, |
| 185 | .platdata_auto_alloc_size = sizeof(struct sandbox_serial_platdata), |
| 186 | .priv_auto_alloc_size = sizeof(struct sandbox_serial_priv), |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 187 | .probe = sandbox_serial_probe, |
Simon Glass | 72e9822 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 188 | .remove = sandbox_serial_remove, |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 189 | .ops = &sandbox_serial_ops, |
| 190 | .flags = DM_FLAG_PRE_RELOC, |
| 191 | }; |
| 192 | |
Simon Glass | 72e9822 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 193 | static const struct sandbox_serial_platdata platdata_non_fdt = { |
| 194 | .colour = -1, |
| 195 | }; |
| 196 | |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 197 | U_BOOT_DEVICE(serial_sandbox_non_fdt) = { |
| 198 | .name = "serial_sandbox", |
Simon Glass | 72e9822 | 2014-09-04 16:27:28 -0600 | [diff] [blame] | 199 | .platdata = &platdata_non_fdt, |
Simon Glass | 890fcef | 2014-09-04 16:27:27 -0600 | [diff] [blame] | 200 | }; |