mainboard/siemens/mc_tcu3: Add new mainboard.

This mainboard is based on Intel's Bayleybay
board which uses Bay Trail CPU with Intel FSP.
It has one USB3.0 interface, 4 USB2.0 interfaces,
up to two Ethernet ports and a LVDS connection
for LCD panels. The board is equipped with 512 MB
of DDR3 in a memory down configuration.

This board boots into Ubuntu/Lubuntu 14.10 using SeaBIOS,
but other OSes should work as well (but are not tested).
It has a version.hex file which is needed for
our OS and has no hardware functionality.

Change-Id: I94401bbd1d61ec69703de38ae1bc97969c5d979e
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: http://review.coreboot.org/8430
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

1 files changed, 181 insertions, 0 deletions

diff --git a/src/mainboard/siemens/mc_tcu3/ptn3460.c b/src/mainboard/siemens/mc_tcu3/ptn3460.c
new file mode 100644
index 0000000000..bb204e5f8f
--- /dev/null
+++ b/src/mainboard/siemens/mc_tcu3/ptn3460.c
@@ -0,0 +1,181 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Siemens AG
+ *
+ * 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; version 2 of the License.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <console/console.h>
+#include "baytrail/i2c.h"
+#include "ptn3460.h"
+
+/** \brief This functions sets up the DP2LVDS-converter to be used with the
+ *         appropriate lcd panel
+ * @param  lcd_type  Type of LCD we should set up the converter for
+ * @param  *sib      Pointer to short info block structure
+ * @param  *eib      Pointer to EDID info block structure
+ * @return           0 on success or error code
+ */
+int ptn3460_init(char lcd_type, struct edidinfo *eib, struct shortinfo *sib)
+{
+	struct ptn_3460_config cfg;
+	int status;
+
+
+	status = i2c_init(PTN_I2C_CONTROLER);
+	if (status)
+		return (PTN_BUS_ERROR | status);
+
+	/* If we are here, we have all the desired information for setting up */
+	/* DP2LVDS converter. In addition, the information matches the connected */
+	/* LCD-panel and therefore, we do not have to distinguish between */
+	/* different panels here for the timing. Inside the converter, table 6 */
+	/* will be used for the timings. */
+	status = ptn3460_write_edid(6, eib->edid);
+	if (status)
+		return status;
+	/* Select this table to be emulated */
+	ptn_select_edid(6);
+	/* Read PTN configuration data */
+	status = i2c_read(PTN_I2C_CONTROLER, PTN_SLAVE_ADR, PTN_CONFIG_OFF,
+			  (u8*)&cfg, PTN_CONFIG_LEN);
+	if (status)
+		return (PTN_BUS_ERROR | status);
+
+	/* Set up configuration data according to the information blocks we get */
+	cfg.dp_interface_ctrl = 0;
+	cfg.lvds_interface_ctrl1 = 0x00;
+	if (sib->panelFeatures[SIB_DISP_CON_IDX] == SIB_LVDS_DUAL_LANE)
+		cfg.lvds_interface_ctrl1 |= 0x0b; /* Turn on dual LVDS lane and clock */
+	if ((sib->panelFeatures[SIB_HWINIT_IDX] & 0x03) == SIB_COLOR_6BIT)
+		cfg.lvds_interface_ctrl1 |= 0x20; /* Use 18 bits per pixel */
+
+	cfg.lvds_interface_ctrl2 = 0x03;  /* no clock spreading, 300 mV LVDS swing */
+	cfg.lvds_interface_ctrl3 = 0x00;  /* no LVDS signal swap */
+	cfg.t2_delay = 1;		  /* Delay T2 (VDD to LVDS active) by 16 ms */
+	cfg.t3_timing = 5;		  /* 250 ms from LVDS to backlight active */
+	cfg.t12_timing = 20;		  /* 1 second re-power delay */
+	cfg.t4_timing = 3;		  /* 150 ms backlight off to LVDS inactive */
+	cfg.t5_delay = 1;		  /* Delay T5 (LVDS to VDD inactive) by 16 ms */
+	cfg.backlight_ctrl = 0;		  /* Enable backlight control */
+
+	/* Write back configuration data to PTN3460 */
+	status = i2c_write(PTN_I2C_CONTROLER, PTN_SLAVE_ADR, PTN_CONFIG_OFF,
+			   (u8*)&cfg, PTN_CONFIG_LEN);
+	if (status)
+		return (PTN_BUS_ERROR | status);
+	else
+		return PTN_NO_ERROR;
+}
+
+/** \brief This functions reads one desired EDID data structure from PTN3460
+ * @param  edid_num Number of EDID that must be read (0..6)
+ * @param  *data    Pointer to a buffer where to store read data
+ * @return          0 on success or error code
+ */
+int ptn3460_read_edid(u8 edid_num, u8 *data)
+{
+	int status;
+
+	if (edid_num > PTN_MAX_EDID_NUM)
+		return PTN_INVALID_EDID;
+	/* First enable access to the desired EDID table */
+	status = i2c_write(PTN_I2C_CONTROLER, PTN_SLAVE_ADR, PTN_CONFIG_OFF + 5,
+			   &edid_num, 1);
+	if (status)
+		return (PTN_BUS_ERROR | status);
+
+	/* Now we can simply read back EDID-data */
+	status = i2c_read(PTN_I2C_CONTROLER, PTN_SLAVE_ADR, PTN_EDID_OFF,
+			  data, PTN_EDID_LEN);
+	if (status)
+		return (PTN_BUS_ERROR | status);
+	else
+		return PTN_NO_ERROR;
+}
+
+/** \brief This functions writes one EDID data structure to PTN3460
+ * @param  edid_num  Number of EDID that must be written (0..6)
+ * @param  *data     Pointer to a buffer where data to write is stored in
+ * @return           0 on success or error code
+ */
+int ptn3460_write_edid(u8 edid_num, u8 *data)
+{
+	int status;
+
+	if (edid_num > PTN_MAX_EDID_NUM)
+		return PTN_INVALID_EDID;
+	/* First enable access to the desired EDID table */
+	status = i2c_write(PTN_I2C_CONTROLER, PTN_SLAVE_ADR, PTN_CONFIG_OFF + 5,
+			   &edid_num, 1);
+	if (status)
+		return (PTN_BUS_ERROR | status);
+
+	/* Now we can simply write EDID-data to ptn3460 */
+	status = i2c_write(PTN_I2C_CONTROLER, PTN_SLAVE_ADR, PTN_EDID_OFF,
+			   data, PTN_EDID_LEN);
+	if (status)
+		return (PTN_BUS_ERROR | status);
+	else
+		return PTN_NO_ERROR;
+}
+
+/** \brief  This functions selects one of 7 EDID-tables inside PTN3460
+ *          which should be emulated on display port and turn emulation ON
+ * @param   edid_num  Number of EDID to emulate (0..6)
+ * @return            0 on success or error code
+ */
+int ptn_select_edid (u8 edid_num)
+{
+	int status;
+	u8 val;
+
+	if (edid_num > PTN_MAX_EDID_NUM)
+		return PTN_INVALID_EDID;
+	/* Enable emulation of the desired EDID table */
+	val = (edid_num << 1) | 1;
+	status = i2c_write(PTN_I2C_CONTROLER, PTN_SLAVE_ADR, PTN_CONFIG_OFF + 4,
+			   &val, 1);
+	if (status)
+		return (PTN_BUS_ERROR | status);
+	else
+		return PTN_NO_ERROR;
+}
+
+/** \brief This functions performs a flash operation which will write
+ *         current configuration table (all the EDID-tables and the
+ *         configuration space with a total amount of 1 KByte)
+ *         to the internal flash of PTN3460
+ * @param  none
+ * @return 0 on success or error code
+ */
+int ptn3460_flash_config(void)
+{
+	int status;
+	struct ptn_3460_flash flash;
+
+	flash.cmd = 0x01;	/* perform erase and flash cycle */
+	flash.magic = 0x7845;	/* Magic number to protect flash operation */
+	flash.trigger = 0x56;	/* This value starts flash operation */
+	status = i2c_write(PTN_I2C_CONTROLER, PTN_SLAVE_ADR, PTN_FLASH_CFG_OFF,
+			   (u8*)&flash, PTN_FLASH_CFG_LEN);
+	if (status) {
+		return (PTN_BUS_ERROR | status);
+	} else {
+		/* To ensure the flash operation is finished, we have to wait 300 ms */
+		mdelay(300);
+		return PTN_NO_ERROR;
+	}
+}