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sandbox: serial: Support a coloured console

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The current sandbox serial driver is a pretty trivial example and does not
have the featues that might be needed for other board serial drivers. To
help provide a better example, add a text colour property to the device
tree for sandbox. This uses platform data, a device tree node, driver
private data and a remove() method.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2014-09-04 16:27:28 -06:00
parent 890fcefe2e
commit 72e98228c3
1 changed files with 83 additions and 0 deletions
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83
drivers/serial/sandbox.c
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@ -34,19 +34,67 @@ static char serial_buf[16];
static unsigned int serial_buf_write;
static unsigned int serial_buf_read;
struct sandbox_serial_platdata {
int colour; /* Text colour to use for output, -1 for none */
};
struct sandbox_serial_priv {
bool start_of_line;
};
/**
* output_ansi_colour() - Output an ANSI colour code
*
* @colour: Colour to output (0-7)
*/
static void output_ansi_colour(int colour)
{
char ansi_code[] = "\x1b[1;3Xm";
ansi_code[5] = '0' + colour;
os_write(1, ansi_code, sizeof(ansi_code) - 1);
}
static void output_ansi_reset(void)
{
os_write(1, "\x1b[0m", 4);
}
static int sandbox_serial_probe(struct udevice *dev)
{
struct sandbox_state *state = state_get_current();
struct sandbox_serial_priv *priv = dev_get_priv(dev);
if (state->term_raw != STATE_TERM_COOKED)
os_tty_raw(0, state->term_raw == STATE_TERM_RAW_WITH_SIGS);
priv->start_of_line = 0;
return 0;
}
static int sandbox_serial_remove(struct udevice *dev)
{
struct sandbox_serial_platdata *plat = dev->platdata;
if (plat->colour != -1)
output_ansi_reset();
return 0;
}
static int sandbox_serial_putc(struct udevice *dev, const char ch)
{
struct sandbox_serial_priv *priv = dev_get_priv(dev);
struct sandbox_serial_platdata *plat = dev->platdata;
if (priv->start_of_line && plat->colour != -1) {
priv->start_of_line = false;
output_ansi_colour(plat->colour);
}
os_write(1, &ch, 1);
if (ch == '\n')
priv->start_of_line = true;
return 0;
}
@ -91,6 +139,32 @@ static int sandbox_serial_getc(struct udevice *dev)
return result;
}
static const char * const ansi_colour[] = {
"black", "red", "green", "yellow", "blue", "megenta", "cyan",
"white",
};
static int sandbox_serial_ofdata_to_platdata(struct udevice *dev)
{
struct sandbox_serial_platdata *plat = dev->platdata;
const char *colour;
int i;
plat->colour = -1;
colour = fdt_getprop(gd->fdt_blob, dev->of_offset,
"sandbox,text-colour", NULL);
if (colour) {
for (i = 0; i < ARRAY_SIZE(ansi_colour); i++) {
if (!strcmp(colour, ansi_colour[i])) {
plat->colour = i;
break;
}
}
}
return 0;
}
static const struct dm_serial_ops sandbox_serial_ops = {
.putc = sandbox_serial_putc,
.pending = sandbox_serial_pending,
@ -106,11 +180,20 @@ U_BOOT_DRIVER(serial_sandbox) = {
.name = "serial_sandbox",
.id = UCLASS_SERIAL,
.of_match = sandbox_serial_ids,
.ofdata_to_platdata = sandbox_serial_ofdata_to_platdata,
.platdata_auto_alloc_size = sizeof(struct sandbox_serial_platdata),
.priv_auto_alloc_size = sizeof(struct sandbox_serial_priv),
.probe = sandbox_serial_probe,
.remove = sandbox_serial_remove,
.ops = &sandbox_serial_ops,
.flags = DM_FLAG_PRE_RELOC,
};
static const struct sandbox_serial_platdata platdata_non_fdt = {
.colour = -1,
};
U_BOOT_DEVICE(serial_sandbox_non_fdt) = {
.name = "serial_sandbox",
.platdata = &platdata_non_fdt,
};