1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2011 The Chromium OS Authors.
7 * This provide a test serial port. It provides an emulated serial port where
8 * a test program and read out the serial output and inject serial input for
19 #include <linux/compiler.h>
20 #include <asm/serial.h>
21 #include <asm/state.h>
23 DECLARE_GLOBAL_DATA_PTR;
26 * output_ansi_colour() - Output an ANSI colour code
28 * @colour: Colour to output (0-7)
30 static void output_ansi_colour(int colour)
32 char ansi_code[] = "\x1b[1;3Xm";
34 ansi_code[5] = '0' + colour;
35 os_write(1, ansi_code, sizeof(ansi_code) - 1);
38 static void output_ansi_reset(void)
40 os_write(1, "\x1b[0m", 4);
43 static int sandbox_serial_probe(struct udevice *dev)
45 struct sandbox_state *state = state_get_current();
46 struct sandbox_serial_priv *priv = dev_get_priv(dev);
48 if (state->term_raw != STATE_TERM_COOKED)
49 os_tty_raw(0, state->term_raw == STATE_TERM_RAW_WITH_SIGS);
50 priv->start_of_line = 0;
52 if (state->term_raw != STATE_TERM_RAW)
54 membuff_init(&priv->buf, priv->serial_buf, sizeof(priv->serial_buf));
59 static int sandbox_serial_remove(struct udevice *dev)
61 struct sandbox_serial_plat *plat = dev_get_plat(dev);
63 if (plat->colour != -1)
69 static int sandbox_serial_putc(struct udevice *dev, const char ch)
71 struct sandbox_serial_priv *priv = dev_get_priv(dev);
72 struct sandbox_serial_plat *plat = dev_get_plat(dev);
74 /* With of-platdata we don't real the colour correctly, so disable it */
75 if (!CONFIG_IS_ENABLED(OF_PLATDATA) && priv->start_of_line &&
77 priv->start_of_line = false;
78 output_ansi_colour(plat->colour);
83 priv->start_of_line = true;
88 static int sandbox_serial_pending(struct udevice *dev, bool input)
90 struct sandbox_serial_priv *priv = dev_get_priv(dev);
99 if (!IS_ENABLED(CONFIG_SPL_BUILD))
101 avail = membuff_putraw(&priv->buf, 100, false, &data);
103 return 1; /* buffer full */
105 count = os_read(0, data, avail);
107 membuff_putraw(&priv->buf, count, true, &data);
109 return membuff_avail(&priv->buf);
112 static int sandbox_serial_getc(struct udevice *dev)
114 struct sandbox_serial_priv *priv = dev_get_priv(dev);
116 if (!sandbox_serial_pending(dev, true))
117 return -EAGAIN; /* buffer empty */
119 return membuff_getbyte(&priv->buf);
122 #ifdef CONFIG_DEBUG_UART_SANDBOX
124 #include <debug_uart.h>
126 static inline void _debug_uart_init(void)
130 static inline void _debug_uart_putc(int ch)
137 #endif /* CONFIG_DEBUG_UART_SANDBOX */
139 static int sandbox_serial_getconfig(struct udevice *dev, uint *serial_config)
141 uint config = SERIAL_DEFAULT_CONFIG;
146 *serial_config = config;
151 static int sandbox_serial_setconfig(struct udevice *dev, uint serial_config)
153 u8 parity = SERIAL_GET_PARITY(serial_config);
154 u8 bits = SERIAL_GET_BITS(serial_config);
155 u8 stop = SERIAL_GET_STOP(serial_config);
157 if (bits != SERIAL_8_BITS || stop != SERIAL_ONE_STOP ||
158 parity != SERIAL_PAR_NONE)
159 return -ENOTSUPP; /* not supported in driver*/
164 static int sandbox_serial_getinfo(struct udevice *dev,
165 struct serial_device_info *serial_info)
167 struct serial_device_info info = {
168 .type = SERIAL_CHIP_UNKNOWN,
169 .addr_space = SERIAL_ADDRESS_SPACE_IO,
170 .addr = SERIAL_DEFAULT_ADDRESS,
174 .clock = SERIAL_DEFAULT_CLOCK,
185 static const char * const ansi_colour[] = {
186 "black", "red", "green", "yellow", "blue", "megenta", "cyan",
190 static int sandbox_serial_of_to_plat(struct udevice *dev)
192 struct sandbox_serial_plat *plat = dev_get_plat(dev);
196 if (CONFIG_IS_ENABLED(OF_PLATDATA))
199 colour = dev_read_string(dev, "sandbox,text-colour");
201 for (i = 0; i < ARRAY_SIZE(ansi_colour); i++) {
202 if (!strcmp(colour, ansi_colour[i])) {
212 static const struct dm_serial_ops sandbox_serial_ops = {
213 .putc = sandbox_serial_putc,
214 .pending = sandbox_serial_pending,
215 .getc = sandbox_serial_getc,
216 .getconfig = sandbox_serial_getconfig,
217 .setconfig = sandbox_serial_setconfig,
218 .getinfo = sandbox_serial_getinfo,
221 static const struct udevice_id sandbox_serial_ids[] = {
222 { .compatible = "sandbox,serial" },
226 U_BOOT_DRIVER(sandbox_serial) = {
227 .name = "sandbox_serial",
229 .of_match = sandbox_serial_ids,
230 .of_to_plat = sandbox_serial_of_to_plat,
231 .plat_auto = sizeof(struct sandbox_serial_plat),
232 .priv_auto = sizeof(struct sandbox_serial_priv),
233 .probe = sandbox_serial_probe,
234 .remove = sandbox_serial_remove,
235 .ops = &sandbox_serial_ops,
236 .flags = DM_FLAG_PRE_RELOC,
239 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
240 static const struct sandbox_serial_plat platdata_non_fdt = {
244 U_BOOT_DRVINFO(serial_sandbox_non_fdt) = {
245 .name = "sandbox_serial",
246 .plat = &platdata_non_fdt,