/*
* Copyright (c) 2011 The Chromium OS Authors.
- * See file CREDITS for list of people who contributed to this
- * project.
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
/*
*/
#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <lcd.h>
#include <os.h>
+#include <serial.h>
+#include <linux/compiler.h>
+#include <asm/state.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ *
+ * serial_buf: A buffer that holds keyboard characters for the
+ * Sandbox U-boot.
+ *
+ * invariants:
+ * serial_buf_write == serial_buf_read -> empty buffer
+ * (serial_buf_write + 1) % 16 == serial_buf_read -> full buffer
+ */
+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";
-int serial_init(void)
+ 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;
}
-void serial_setbrg(void)
+static int sandbox_serial_remove(struct udevice *dev)
{
+ struct sandbox_serial_platdata *plat = dev->platdata;
+
+ if (plat->colour != -1)
+ output_ansi_reset();
+
+ return 0;
}
-void serial_putc(const char ch)
+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;
}
-void serial_puts(const char *str)
+static unsigned int increment_buffer_index(unsigned int index)
{
- os_write(1, str, strlen(str));
+ return (index + 1) % ARRAY_SIZE(serial_buf);
+}
+
+static int sandbox_serial_pending(struct udevice *dev, bool input)
+{
+ const unsigned int next_index =
+ increment_buffer_index(serial_buf_write);
+ ssize_t count;
+
+ if (!input)
+ return 0;
+
+ os_usleep(100);
+#ifdef CONFIG_LCD
+ lcd_sync();
+#endif
+ if (next_index == serial_buf_read)
+ return 1; /* buffer full */
+
+ count = os_read_no_block(0, &serial_buf[serial_buf_write], 1);
+ if (count == 1)
+ serial_buf_write = next_index;
+
+ return serial_buf_write != serial_buf_read;
}
-int serial_getc(void)
+static int sandbox_serial_getc(struct udevice *dev)
{
- char buf;
- int count;
+ int result;
+
+ if (!sandbox_serial_pending(dev, true))
+ return -EAGAIN; /* buffer empty */
- count = os_read(0, &buf, 1);
- return count == 1 ? buf : 0;
+ result = serial_buf[serial_buf_read];
+ serial_buf_read = increment_buffer_index(serial_buf_read);
+ return result;
}
-int serial_tstc(void)
+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,
+ .getc = sandbox_serial_getc,
+};
+
+static const struct udevice_id sandbox_serial_ids[] = {
+ { .compatible = "sandbox,serial" },
+ { }
+};
+
+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,
+};
projects / karo-tx-uboot.git / blobdiff