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 <asm/global_data.h>
20 #include <linux/compiler.h>
21 #include <asm/serial.h>
22 #include <asm/state.h>
24 DECLARE_GLOBAL_DATA_PTR;
27 * output_ansi_colour() - Output an ANSI colour code
29 * @colour: Colour to output (0-7)
31 static void output_ansi_colour(int colour)
33 char ansi_code[] = "\x1b[1;3Xm";
35 ansi_code[5] = '0' + colour;
36 os_write(1, ansi_code, sizeof(ansi_code) - 1);
39 static void output_ansi_reset(void)
41 os_write(1, "\x1b[0m", 4);
44 static int sandbox_serial_probe(struct udevice *dev)
46 struct sandbox_state *state = state_get_current();
47 struct sandbox_serial_priv *priv = dev_get_priv(dev);
49 if (state->term_raw != STATE_TERM_COOKED)
50 os_tty_raw(0, state->term_raw == STATE_TERM_RAW_WITH_SIGS);
51 priv->start_of_line = 0;
53 if (state->term_raw != STATE_TERM_RAW)
55 membuff_init(&priv->buf, priv->serial_buf, sizeof(priv->serial_buf));
60 static int sandbox_serial_remove(struct udevice *dev)
62 struct sandbox_serial_plat *plat = dev_get_plat(dev);
64 if (plat->colour != -1)
70 static int sandbox_serial_putc(struct udevice *dev, const char ch)
72 struct sandbox_serial_priv *priv = dev_get_priv(dev);
73 struct sandbox_serial_plat *plat = dev_get_plat(dev);
75 /* With of-platdata we don't real the colour correctly, so disable it */
76 if (!CONFIG_IS_ENABLED(OF_PLATDATA) && priv->start_of_line &&
78 priv->start_of_line = false;
79 output_ansi_colour(plat->colour);
84 priv->start_of_line = true;
89 static int sandbox_serial_pending(struct udevice *dev, bool input)
91 struct sandbox_serial_priv *priv = dev_get_priv(dev);
100 if (!IS_ENABLED(CONFIG_SPL_BUILD))
102 avail = membuff_putraw(&priv->buf, 100, false, &data);
104 return 1; /* buffer full */
106 count = os_read(0, data, avail);
108 membuff_putraw(&priv->buf, count, true, &data);
110 return membuff_avail(&priv->buf);
113 static int sandbox_serial_getc(struct udevice *dev)
115 struct sandbox_serial_priv *priv = dev_get_priv(dev);
117 if (!sandbox_serial_pending(dev, true))
118 return -EAGAIN; /* buffer empty */
120 return membuff_getbyte(&priv->buf);
123 #ifdef CONFIG_DEBUG_UART_SANDBOX
125 #include <debug_uart.h>
127 static inline void _debug_uart_init(void)
131 static inline void _debug_uart_putc(int ch)
138 #endif /* CONFIG_DEBUG_UART_SANDBOX */
140 static int sandbox_serial_getconfig(struct udevice *dev, uint *serial_config)
142 uint config = SERIAL_DEFAULT_CONFIG;
147 *serial_config = config;
152 static int sandbox_serial_setconfig(struct udevice *dev, uint serial_config)
154 u8 parity = SERIAL_GET_PARITY(serial_config);
155 u8 bits = SERIAL_GET_BITS(serial_config);
156 u8 stop = SERIAL_GET_STOP(serial_config);
158 if (bits != SERIAL_8_BITS || stop != SERIAL_ONE_STOP ||
159 parity != SERIAL_PAR_NONE)
160 return -ENOTSUPP; /* not supported in driver*/
165 static int sandbox_serial_getinfo(struct udevice *dev,
166 struct serial_device_info *serial_info)
168 struct serial_device_info info = {
169 .type = SERIAL_CHIP_UNKNOWN,
170 .addr_space = SERIAL_ADDRESS_SPACE_IO,
171 .addr = SERIAL_DEFAULT_ADDRESS,
175 .clock = SERIAL_DEFAULT_CLOCK,
186 static const char * const ansi_colour[] = {
187 "black", "red", "green", "yellow", "blue", "megenta", "cyan",
191 static int sandbox_serial_of_to_plat(struct udevice *dev)
193 struct sandbox_serial_plat *plat = dev_get_plat(dev);
197 if (CONFIG_IS_ENABLED(OF_PLATDATA))
200 colour = dev_read_string(dev, "sandbox,text-colour");
202 for (i = 0; i < ARRAY_SIZE(ansi_colour); i++) {
203 if (!strcmp(colour, ansi_colour[i])) {
213 static const struct dm_serial_ops sandbox_serial_ops = {
214 .putc = sandbox_serial_putc,
215 .pending = sandbox_serial_pending,
216 .getc = sandbox_serial_getc,
217 .getconfig = sandbox_serial_getconfig,
218 .setconfig = sandbox_serial_setconfig,
219 .getinfo = sandbox_serial_getinfo,
222 static const struct udevice_id sandbox_serial_ids[] = {
223 { .compatible = "sandbox,serial" },
227 U_BOOT_DRIVER(sandbox_serial) = {
228 .name = "sandbox_serial",
230 .of_match = sandbox_serial_ids,
231 .of_to_plat = sandbox_serial_of_to_plat,
232 .plat_auto = sizeof(struct sandbox_serial_plat),
233 .priv_auto = sizeof(struct sandbox_serial_priv),
234 .probe = sandbox_serial_probe,
235 .remove = sandbox_serial_remove,
236 .ops = &sandbox_serial_ops,
237 .flags = DM_FLAG_PRE_RELOC,
240 #if CONFIG_IS_ENABLED(OF_REAL)
241 static const struct sandbox_serial_plat platdata_non_fdt = {
245 U_BOOT_DRVINFO(serial_sandbox_non_fdt) = {
246 .name = "sandbox_serial",
247 .plat = &platdata_non_fdt,