1 files changed, 247 insertions, 0 deletions
diff --git a/board/gdsys/common/osd.c b/board/gdsys/common/osd.c
new file mode 100644
index 0000000..05800ff
--- /dev/null
+++ b/board/gdsys/common/osd.c
@@ -0,0 +1,247 @@
+/*
+ * (C) Copyright 2010
+ * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.de
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <asm/io.h>
+
+#include "fpga.h"
+
+#define CH7301_I2C_ADDR 0x75
+
+#define PIXCLK_640_480_60 25180000
+
+#define BASE_WIDTH 32
+#define BASE_HEIGHT 16
+#define BUFSIZE (BASE_WIDTH * BASE_HEIGHT)
+
+enum {
+	REG_CONTROL = 0x0010,
+	REG_MPC3W_CONTROL = 0x001a,
+	REG_VIDEOCONTROL = 0x0042,
+	REG_OSDVERSION = 0x0100,
+	REG_OSDFEATURES = 0x0102,
+	REG_OSDCONTROL = 0x0104,
+	REG_XY_SIZE = 0x0106,
+	REG_VIDEOMEM = 0x0800,
+};
+
+enum {
+	CH7301_CM = 0x1c,		/* Clock Mode Register */
+	CH7301_IC = 0x1d,		/* Input Clock Register */
+	CH7301_GPIO = 0x1e,		/* GPIO Control Register */
+	CH7301_IDF = 0x1f,		/* Input Data Format Register */
+	CH7301_CD = 0x20,		/* Connection Detect Register */
+	CH7301_DC = 0x21,		/* DAC Control Register */
+	CH7301_HPD = 0x23,		/* Hot Plug Detection Register */
+	CH7301_TCTL = 0x31,		/* DVI Control Input Register */
+	CH7301_TPCP = 0x33,		/* DVI PLL Charge Pump Ctrl Register */
+	CH7301_TPD = 0x34,		/* DVI PLL Divide Register */
+	CH7301_TPVT = 0x35,		/* DVI PLL Supply Control Register */
+	CH7301_TPF = 0x36,		/* DVI PLL Filter Register */
+	CH7301_TCT = 0x37,		/* DVI Clock Test Register */
+	CH7301_TSTP = 0x48,		/* Test Pattern Register */
+	CH7301_PM = 0x49,		/* Power Management register */
+	CH7301_VID = 0x4a,		/* Version ID Register */
+	CH7301_DID = 0x4b,		/* Device ID Register */
+	CH7301_DSP = 0x56,		/* DVI Sync polarity Register */
+};
+
+static void mpc92469ac_calc_parameters(unsigned int fout,
+	unsigned int *post_div, unsigned int *feedback_div)
+{
+	unsigned int n = *post_div;
+	unsigned int m = *feedback_div;
+	unsigned int a;
+	unsigned int b = 14745600 / 16;
+
+	if (fout < 50169600)
+		n = 8;
+	else if (fout < 100339199)
+		n = 4;
+	else if (fout < 200678399)
+		n = 2;
+	else
+		n = 1;
+
+	a = fout * n + (b / 2); /* add b/2 for proper rounding */
+
+	m = a / b;
+
+	*post_div = n;
+	*feedback_div = m;
+}
+
+static void mpc92469ac_set(unsigned int fout)
+{
+	unsigned int n;
+	unsigned int m;
+	unsigned int bitval = 0;
+	mpc92469ac_calc_parameters(fout, &n, &m);
+
+	switch (n) {
+	case 1:
+		bitval = 0x00;
+		break;
+	case 2:
+		bitval = 0x01;
+		break;
+	case 4:
+		bitval = 0x02;
+		break;
+	case 8:
+		bitval = 0x03;
+		break;
+	}
+
+	fpga_set_reg(REG_MPC3W_CONTROL, (bitval << 9) | m);
+}
+
+static int osd_write_videomem(unsigned offset, u16 *data, size_t charcount)
+{
+	unsigned int k;
+
+	for (k = 0; k < charcount; ++k) {
+		if (offset + k >= BUFSIZE)
+			return -1;
+		fpga_set_reg(REG_VIDEOMEM + 2 * (offset + k), data[k]);
+	}
+
+	return charcount;
+}
+
+static int osd_print(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	unsigned x;
+	unsigned y;
+	unsigned charcount;
+	unsigned len;
+	u8 color;
+	unsigned int k;
+	u16 buf[BUFSIZE];
+	char *text;
+
+	if (argc < 5) {
+		cmd_usage(cmdtp);
+		return 1;
+	}
+
+	x = simple_strtoul(argv[1], NULL, 16);
+	y = simple_strtoul(argv[2], NULL, 16);
+	color = simple_strtoul(argv[3], NULL, 16);
+	text = argv[4];
+	charcount = strlen(text);
+	len = (charcount > BUFSIZE) ? BUFSIZE : charcount;
+
+	for (k = 0; k < len; ++k)
+		buf[k] = (text[k] << 8) | color;
+
+	return osd_write_videomem(y * BASE_WIDTH + x, buf, len);
+}
+
+int osd_probe(void)
+{
+	u8 value;
+	u16 version = fpga_get_reg(REG_OSDVERSION);
+	u16 features = fpga_get_reg(REG_OSDFEATURES);
+	unsigned width;
+	unsigned height;
+
+	width = ((features & 0x3f00) >> 8) + 1;
+	height = (features & 0x001f) + 1;
+
+	printf("OSD:   Digital-OSD version %01d.%02d, %d" "x%d characters\n",
+		version/100, version%100, width, height);
+
+	value = i2c_reg_read(CH7301_I2C_ADDR, CH7301_DID);
+	if (value != 0x17) {
+		printf("       Probing CH7301 failed, DID %02x\n", value);
+		return -1;
+	}
+	i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPCP, 0x08);
+	i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPD, 0x16);
+	i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPF, 0x60);
+	i2c_reg_write(CH7301_I2C_ADDR, CH7301_DC, 0x09);
+	i2c_reg_write(CH7301_I2C_ADDR, CH7301_PM, 0xc0);
+
+	mpc92469ac_set(PIXCLK_640_480_60);
+	fpga_set_reg(REG_VIDEOCONTROL, 0x0002);
+	fpga_set_reg(REG_OSDCONTROL, 0x0049);
+
+	fpga_set_reg(REG_XY_SIZE, ((32 - 1) << 8) | (16 - 1));
+
+	return 0;
+}
+
+int osd_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	unsigned x;
+	unsigned y;
+	unsigned k;
+	u16 buffer[BASE_WIDTH];
+	char *rp;
+	u16 *wp = buffer;
+	unsigned count = (argc > 4) ?  simple_strtoul(argv[4], NULL, 16) : 1;
+
+	if ((argc < 4) || (strlen(argv[3]) % 4)) {
+		cmd_usage(cmdtp);
+		return 1;
+	}
+
+	x = simple_strtoul(argv[1], NULL, 16);
+	y = simple_strtoul(argv[2], NULL, 16);
+	rp = argv[3];
+
+
+	while (*rp) {
+		char substr[5];
+
+		memcpy(substr, rp, 4);
+		substr[4] = 0;
+		*wp = simple_strtoul(substr, NULL, 16);
+
+		rp += 4;
+		wp++;
+		if (wp - buffer > BASE_WIDTH)
+			break;
+	}
+
+	for (k = 0; k < count; ++k) {
+		unsigned offset = y * BASE_WIDTH + x + k * (wp - buffer);
+		osd_write_videomem(offset, buffer, wp - buffer);
+	}
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	osdw, 5, 0, osd_write,
+	"write 16-bit hex encoded buffer to osd memory",
+	"pos_x pos_y buffer count\n"
+);
+
+U_BOOT_CMD(
+	osdp, 5, 0, osd_print,
+	"write ASCII buffer to osd memory",
+	"pos_x pos_y color text\n"
+);