cmd: Add osd commands

Add command to query information from and write text to on-screen
display (OSD) devices.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Simon Glass <sjg@chromium.org>

3 files changed, 300 insertions, 0 deletions

diff --git a/cmd/Kconfig b/cmd/Kconfig
index cf97a0f..442b90a 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -913,6 +913,14 @@ config CMD_ONENAND
 	  and erasing blocks. It allso provides a way to show and change
 	  bad blocks, and test the device.
 
+config CMD_OSD
+	bool "osd"
+	help
+	  Enable the 'osd' command which allows to query information from and
+	  write text data to a on-screen display (OSD) device; a virtual device
+	  associated with a display capable of displaying a text overlay on the
+	  display it's associated with..
+
 config CMD_PART
 	bool "part"
 	select HAVE_BLOCK_DEVICE
diff --git a/cmd/Makefile b/cmd/Makefile
index d3815ab..8f91570 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -97,6 +97,7 @@ obj-$(CONFIG_CMD_MTDPARTS) += mtdparts.o
 obj-$(CONFIG_CMD_NAND) += nand.o
 obj-$(CONFIG_CMD_NET) += net.o
 obj-$(CONFIG_CMD_ONENAND) += onenand.o
+obj-$(CONFIG_CMD_OSD) += osd.o
 obj-$(CONFIG_CMD_PART) += part.o
 ifdef CONFIG_PCI
 obj-$(CONFIG_CMD_PCI) += pci.o
diff --git a/cmd/osd.c b/cmd/osd.c
new file mode 100644
index 0000000..0b1fa49
--- /dev/null
+++ b/cmd/osd.c
@@ -0,0 +1,291 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2017
+ * Mario Six,  Guntermann & Drunck GmbH, mario.six@gdsys.cc
+ *
+ * based on the gdsys osd driver, which is
+ *
+ * (C) Copyright 2010
+ * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.de
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <hexdump.h>
+#include <video_osd.h>
+#include <malloc.h>
+
+/* Container for selected OSD device */
+static struct udevice *osd_cur;
+
+/**
+ * cmd_osd_set_osd_num() - Set the OSD selected for operation
+ *
+ * Set the OSD device, which will be used by all subsequent OSD commands.
+ *
+ * Devices are identified by their uclass sequence number (as listed by 'osd
+ * show').
+ *
+ * @osdnum: The OSD device to be selected, identified by its sequence number.
+ * Return: 0 if OK, -ve on error
+ */
+static int cmd_osd_set_osd_num(unsigned int osdnum)
+{
+	struct udevice *osd;
+	int res;
+
+	res = uclass_get_device_by_seq(UCLASS_VIDEO_OSD, osdnum, &osd);
+	if (res) {
+		printf("%s: No OSD %u (err = %d)\n", __func__, osdnum, res);
+		return res;
+	}
+	osd_cur = osd;
+
+	return 0;
+}
+
+/**
+ * osd_get_osd_cur() - Get the selected OSD device
+ *
+ * Get the OSD device that is used by all OSD commands.
+ *
+ * @osdp: Pointer to structure that will receive the currently selected OSD
+ *	  device.
+ * Return: 0 if OK, -ve on error
+ */
+static int osd_get_osd_cur(struct udevice **osdp)
+{
+	if (!osd_cur) {
+		puts("No osd selected\n");
+		return -ENODEV;
+	}
+	*osdp = osd_cur;
+
+	return 0;
+}
+
+/**
+ * show_osd() - Display information about a OSD device
+ *
+ * Display a device's ID (sequence number), and whether it is active (i.e.
+ * probed) or not.
+ *
+ * @osd: OSD device to print information for
+ */
+static void show_osd(struct udevice *osd)
+{
+	printf("OSD %d:\t%s", osd->req_seq, osd->name);
+	if (device_active(osd))
+		printf("  (active %d)", osd->seq);
+	printf("\n");
+}
+
+static int do_osd_write(cmd_tbl_t *cmdtp, int flag, int argc,
+			char * const argv[])
+{
+	uint x, y;
+	uint count;
+	char *hexstr;
+	u8 *buffer;
+	size_t buflen;
+	int res;
+
+	if (argc < 4 || (strlen(argv[3]) % 2))
+		return CMD_RET_USAGE;
+
+	if (!osd_cur) {
+		puts("No osd selected\n");
+		return CMD_RET_FAILURE;
+	}
+
+	x = simple_strtoul(argv[1], NULL, 16);
+	y = simple_strtoul(argv[2], NULL, 16);
+	hexstr = argv[3];
+	count = (argc > 4) ? simple_strtoul(argv[4], NULL, 16) : 1;
+
+	buflen = strlen(hexstr) / 2;
+
+	buffer = malloc(buflen);
+	if (!buffer) {
+		puts("Memory allocation failure\n");
+		return CMD_RET_FAILURE;
+	}
+
+	res = hex2bin(buffer, hexstr, buflen);
+	if (res) {
+		free(buffer);
+		puts("Hexadecimal input contained invalid characters\n");
+		return CMD_RET_FAILURE;
+	}
+
+	res = video_osd_set_mem(osd_cur, x, y, buffer, buflen, count);
+	if (res) {
+		free(buffer);
+		printf("%s: Could not write to video mem\n",
+		       osd_cur->name);
+		return CMD_RET_FAILURE;
+	}
+
+	free(buffer);
+
+	return CMD_RET_SUCCESS;
+}
+
+static int do_osd_print(cmd_tbl_t *cmdtp, int flag, int argc,
+			char * const argv[])
+{
+	uint x, y;
+	u8 color;
+	char *text;
+	int res;
+
+	if (argc < 5)
+		return CMD_RET_USAGE;
+
+	if (!osd_cur) {
+		puts("No osd selected\n");
+		return CMD_RET_FAILURE;
+	}
+
+	x = simple_strtoul(argv[1], NULL, 16);
+	y = simple_strtoul(argv[2], NULL, 16);
+	color = simple_strtoul(argv[3], NULL, 16);
+	text = argv[4];
+
+	res = video_osd_print(osd_cur, x, y, color, text);
+	if (res) {
+		printf("Could not print string to osd %s\n", osd_cur->name);
+		return CMD_RET_FAILURE;
+	}
+
+	return CMD_RET_SUCCESS;
+}
+
+static int do_osd_size(cmd_tbl_t *cmdtp, int flag, int argc,
+		       char * const argv[])
+{
+	uint x, y;
+	int res;
+
+	if (argc < 3)
+		return CMD_RET_USAGE;
+
+	if (!osd_cur) {
+		puts("No osd selected\n");
+		return CMD_RET_FAILURE;
+	}
+
+	x = simple_strtoul(argv[1], NULL, 16);
+	y = simple_strtoul(argv[2], NULL, 16);
+
+	res = video_osd_set_size(osd_cur, x, y);
+	if (res) {
+		printf("Could not set size on osd %s\n", osd_cur->name);
+		return CMD_RET_FAILURE;
+	}
+
+	return CMD_RET_SUCCESS;
+}
+
+static int do_show_osd(cmd_tbl_t *cmdtp, int flag, int argc,
+		       char * const argv[])
+{
+	struct udevice *osd;
+
+	if (argc == 1) {
+		/* show all OSDs */
+		struct uclass *uc;
+		int res;
+
+		res = uclass_get(UCLASS_VIDEO_OSD, &uc);
+		if (res) {
+			printf("Error while getting OSD uclass (err=%d)\n",
+			       res);
+			return CMD_RET_FAILURE;
+		}
+
+		uclass_foreach_dev(osd, uc)
+			show_osd(osd);
+	} else {
+		int i, res;
+
+		/* show specific OSD */
+		i = simple_strtoul(argv[1], NULL, 10);
+
+		res = uclass_get_device_by_seq(UCLASS_VIDEO_OSD, i, &osd);
+		if (res) {
+			printf("Invalid osd %d: err=%d\n", i, res);
+			return CMD_RET_FAILURE;
+		}
+		show_osd(osd);
+	}
+
+	return CMD_RET_SUCCESS;
+}
+
+static int do_osd_num(cmd_tbl_t *cmdtp, int flag, int argc,
+		      char * const argv[])
+{
+	int osd_no;
+	int res = 0;
+
+	if (argc == 1) {
+		/* querying current setting */
+		struct udevice *osd;
+
+		if (!osd_get_osd_cur(&osd))
+			osd_no = osd->seq;
+		else
+			osd_no = -1;
+		printf("Current osd is %d\n", osd_no);
+	} else {
+		osd_no = simple_strtoul(argv[1], NULL, 10);
+		printf("Setting osd to %d\n", osd_no);
+
+		res = cmd_osd_set_osd_num(osd_no);
+		if (res)
+			printf("Failure changing osd number (err = %d)\n", res);
+	}
+
+	return res ? CMD_RET_FAILURE : CMD_RET_SUCCESS;
+}
+
+static cmd_tbl_t cmd_osd_sub[] = {
+	U_BOOT_CMD_MKENT(show, 1, 1, do_show_osd, "", ""),
+	U_BOOT_CMD_MKENT(dev, 1, 1, do_osd_num, "", ""),
+	U_BOOT_CMD_MKENT(write, 4, 1, do_osd_write, "", ""),
+	U_BOOT_CMD_MKENT(print, 4, 1, do_osd_print, "", ""),
+	U_BOOT_CMD_MKENT(size, 2, 1, do_osd_size, "", ""),
+};
+
+static int do_osd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	cmd_tbl_t *c;
+
+	if (argc < 2)
+		return CMD_RET_USAGE;
+
+	/* Strip off leading 'osd' command argument */
+	argc--;
+	argv++;
+
+	c = find_cmd_tbl(argv[0], &cmd_osd_sub[0], ARRAY_SIZE(cmd_osd_sub));
+
+	if (c)
+		return c->cmd(cmdtp, flag, argc, argv);
+	else
+		return CMD_RET_USAGE;
+}
+
+static char osd_help_text[] =
+	"show  - show OSD info\n"
+	"osd dev [dev] - show or set current OSD\n"
+	"write [pos_x] [pos_y] [buffer] [count] - write 8-bit hex encoded buffer to osd memory at a given position\n"
+	"print [pos_x] [pos_y] [color] [text] - write ASCII buffer (given by text data and driver-specific color information) to osd memory\n"
+	"size [size_x] [size_y] - set OSD XY size in characters\n";
+
+U_BOOT_CMD(
+	osd, 6, 1, do_osd,
+	"OSD sub-system",
+	osd_help_text
+);