board/freescale/common: VSC3316/VSC3308 initialization code

Add code for configuring VSC3316/3308 crosspoint switches Add README to understand the APIs - VSC 3316/3308 is a low-power, low-cost asynchronous crosspoint switch capable of data rates upto 11.5Gbps. VSC3316 has 16 input and 16 output ports whereas VSC3308 has 8 input and 8 output ports. Programming of these devices are performed by two-wire or four-wire serial interface. Signed-off-by: Shaveta Leekha <shaveta@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com>

board/freescale/common: VSC3316/VSC3308 initialization code
Add code for configuring VSC3316/3308 crosspoint switches Add README to understand the APIs - VSC 3316/3308 is a low-power, low-cost asynchronous crosspoint switch capable of data rates upto 11.5Gbps. VSC3316 has 16 input and 16 output ports whereas VSC3308 has 8 input and 8 output ports. Programming of these devices are performed by two-wire or four-wire serial interface. Signed-off-by: Shaveta Leekha <shaveta@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
Shaveta Leekha · Andy Fleming
1 parent 379c5145ef
Showing 4 changed files with 262 additions and 0 deletions Side-by-side Diff
board/freescale/common/Makefile
board/freescale/common/vsc3316_3308.c
board/freescale/common/vsc3316_3308.h
doc/README.VSC3316-3308
@@ -53,6 +53,7 @@
 COBJS-$(CONFIG_P3041DS)		+= ics307_clk.o
 COBJS-$(CONFIG_P4080DS)		+= ics307_clk.o
 COBJS-$(CONFIG_P5020DS)		+= ics307_clk.o
+COBJS-$(CONFIG_VSC_CROSSBAR)    += vsc3316_3308.o
  
 # deal with common files for P-series corenet based devices
 SUBLIB-$(CONFIG_P2041RDB)	+= p_corenet/libp_corenet.o
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *
+ * 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 "vsc3316_3308.h"
+
+#define REVISION_ID_REG		0x7E
+#define INTERFACE_MODE_REG		0x79
+#define CURRENT_PAGE_REGISTER		0x7F
+#define CONNECTION_CONFIG_PAGE		0x00
+#define INPUT_STATE_REG		0x13
+#define GLOBAL_INPUT_ISE1		0x51
+#define GLOBAL_INPUT_ISE2		0x52
+#define GLOBAL_INPUT_LOS		0x55
+#define GLOBAL_CORE_CNTRL		0x5D
+#define OUTPUT_MODE_PAGE		0x23
+#define CORE_CONTROL_PAGE		0x25
+#define CORE_CONFIG_REG		0x75
+
+int vsc_if_enable(unsigned int vsc_addr)
+{
+	u8 data;
+
+	debug("VSC:Configuring VSC at I2C address 0x%2x"
+			" for 2-wire interface\n", vsc_addr);
+
+	/* enable 2-wire Serial InterFace (I2C) */
+	data = 0x02;
+	return i2c_write(vsc_addr, INTERFACE_MODE_REG, 1, &data, 1);
+}
+
+int vsc3316_config(unsigned int vsc_addr, const int8_t con_arr[][2],
+		unsigned int num_con)
+{
+	unsigned int i;
+	u8 rev_id = 0;
+	int ret;
+
+	debug("VSC:Initializing VSC3316 at I2C address 0x%2x"
+		" for Tx\n", vsc_addr);
+
+	ret = i2c_read(vsc_addr, REVISION_ID_REG, 1, &rev_id, 1);
+	if (ret < 0) {
+		printf("VSC:0x%x could not read REV_ID from device.\n",
+			vsc_addr);
+		return ret;
+	}
+
+	if (rev_id != 0xab) {
+		printf("VSC: device at address 0x%x is not VSC3316/3308.\n",
+			vsc_addr);
+		return -ENODEV;
+	}
+
+	ret = vsc_if_enable(vsc_addr);
+	if (ret) {
+		printf("VSC:0x%x could not configured for 2-wire I/F.\n",
+			vsc_addr);
+		return ret;
+	}
+
+	/* config connections - page 0x00 */
+	i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, CONNECTION_CONFIG_PAGE);
+
+	/* Making crosspoint connections, by connecting required
+	 * input to output */
+	for (i = 0; i < num_con ; i++)
+		i2c_reg_write(vsc_addr, con_arr[i][1], con_arr[i][0]);
+
+	/* input state - page 0x13 */
+	i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, INPUT_STATE_REG);
+	/* Configuring the required input of the switch */
+	for (i = 0; i < num_con ; i++)
+		i2c_reg_write(vsc_addr, con_arr[i][0], 0x80);
+
+	/* Setting Global Input LOS threshold value */
+	i2c_reg_write(vsc_addr, GLOBAL_INPUT_LOS, 0x60);
+
+	/* config output mode - page 0x23 */
+	i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, OUTPUT_MODE_PAGE);
+	/* Turn ON the Output driver correspond to required output*/
+	for (i = 0; i < num_con ; i++)
+		i2c_reg_write(vsc_addr,  con_arr[i][1], 0);
+
+	/* configure global core control register, Turn on Global core power */
+	i2c_reg_write(vsc_addr, GLOBAL_CORE_CNTRL, 0);
+
+	vsc_wp_config(vsc_addr);
+
+	return 0;
+}
+
+int vsc3308_config(unsigned int vsc_addr, const int8_t con_arr[][2],
+		unsigned int num_con)
+{
+	unsigned int i;
+	u8 rev_id = 0;
+	int ret;
+
+	debug("VSC:Initializing VSC3308 at I2C address 0x%x"
+		" for Tx\n", vsc_addr);
+
+	ret = i2c_read(vsc_addr, REVISION_ID_REG, 1, &rev_id, 1);
+	if (ret < 0) {
+		printf("VSC:0x%x could not read REV_ID from device.\n",
+			vsc_addr);
+		return ret;
+	}
+
+	if (rev_id != 0xab) {
+		printf("VSC: device at address 0x%x is not VSC3316/3308.\n",
+			vsc_addr);
+		return -ENODEV;
+	}
+
+	ret = vsc_if_enable(vsc_addr);
+	if (ret) {
+		printf("VSC:0x%x could not configured for 2-wire I/F.\n",
+			vsc_addr);
+		return ret;
+	}
+
+	/* config connections - page 0x00 */
+	i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, CONNECTION_CONFIG_PAGE);
+
+	/* Making crosspoint connections, by connecting required
+	 * input to output */
+	for (i = 0; i < num_con ; i++)
+		i2c_reg_write(vsc_addr, con_arr[i][1], con_arr[i][0]);
+
+	/*Configure Global Input ISE and gain */
+	i2c_reg_write(vsc_addr, GLOBAL_INPUT_ISE1, 0x12);
+	i2c_reg_write(vsc_addr, GLOBAL_INPUT_ISE2, 0x12);
+
+	/* input state - page 0x13 */
+	i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, INPUT_STATE_REG);
+	/* Turning ON the required input of the switch */
+	for (i = 0; i < num_con ; i++)
+		i2c_reg_write(vsc_addr, con_arr[i][0], 0);
+
+	/* Setting Global Input LOS threshold value */
+	i2c_reg_write(vsc_addr, GLOBAL_INPUT_LOS, 0x60);
+
+	/* config output mode - page 0x23 */
+	i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, OUTPUT_MODE_PAGE);
+	/* Turn ON the Output driver correspond to required output*/
+	for (i = 0; i < num_con ; i++)
+		i2c_reg_write(vsc_addr,  con_arr[i][1], 0);
+
+	/* configure global core control register, Turn on Global core power */
+	i2c_reg_write(vsc_addr, GLOBAL_CORE_CNTRL, 0);
+
+	vsc_wp_config(vsc_addr);
+
+	return 0;
+}
+
+void vsc_wp_config(unsigned int vsc_addr)
+{
+	debug("VSC:Configuring VSC at address:0x%x for WP\n", vsc_addr);
+
+	/* For new crosspoint configuration to occur, WP bit of
+	 * CORE_CONFIG_REG should be set 1 and then reset to 0 */
+	i2c_reg_write(vsc_addr, CORE_CONFIG_REG, 0x01);
+	i2c_reg_write(vsc_addr, CORE_CONFIG_REG, 0x0);
+}
+/*
+ * Copyright 2012 Freescale Semiconductor, Inc.
+ *
+ * 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
+ */
+
+#ifndef __VSC_CROSSBAR_H_
+#define __VSC_CROSSBAR_H	1_
+
+#include <common.h>
+#include <i2c.h>
+#include <errno.h>
+
+int vsc_if_enable(unsigned int vsc_addr);
+int vsc3316_config(unsigned int vsc_addr, const int8_t con_arr[][2],
+		unsigned int num_con);
+int vsc3308_config(unsigned int vsc_addr, const int8_t con_arr[][2],
+		unsigned int num_con);
+void vsc_wp_config(unsigned int vsc_addr);
+
+#endif	/* __VSC_CROSSBAR_H_ */
+This file contains API information of the initialization code written for
+Vitesse cross-point devices, VSC3316 and VSC3308 for board B4860QDS
+
+Author: Shaveta Leekha <shaveta@freescale.com>
+
+About Device:
+=============
+VSC 3316/3308 is a low-power, low-cost asynchronous crosspoint switch capable of data rates upto 11.5Gbps.
+
+VSC3316 has 16 input and 16 output ports whereas VSC3308 has 8 input and 8 output ports. Programming of these devices are performed by two-wire or four-wire serial interface.
+
+Initialization:
+===============
+On reset, VSC devices are in low-power state with all inputs, outputs and connections in an off state.
+First thing required is to program it to interface with either two-wire or four-wire interface.
+In our case the interface is two-wire I2C serial interface. So the value in Interface mode register at address 79.h to be written is 0x02 for two-wire interface. Also for crosspoint connections to be activated, 01.h value need to be written in 75.h (core configuration register).
+
+API Overview:
+=============
+
+	vsc_if_enable(u8 vsc_addr):
+	--------------------------
+		This API programs VSC to interface with either two-wire or four-wire interface. In our case the interface is two-wire I2C serial interface. So the value in Interface mode register at address 79.h to be written is 0x02 for two-wire interface.
+	Parameters:
+		vsc_addr - Address of the VSC device on board.
+
+
+	vsc3316_config(u8 vsc_addr, int con_arr[][2], u8 num_con):
+	---------------------------------------------------------
+	This API configures the VSC3316 device for required connections. Connection through the VSC device requires the inputs and outputs to be properly configured.
+	Connection registers are on page 00. It Configures the selected input and output correctly and join them to make a connection. It also program Input state register, Global input ISE, Global input LOS, Global core control, Output mode register and core control registers etc.
+	vsc3308_config(u8 vsc_addr, int con_arr[][2], u8 num_con) does the essential configurations for VSC3308.
+
+	Parameters:
+		vsc_addr - Address of the VSC device on board.
+		con_arr - connection array
+		num_con - number of connections to be configured
+
+	vsc_wp_config(u8 vsc_addr):
+	--------------------------
+		For crosspoint connections to be activated, 01.h value need to be written in 75.h (core configuration register), which is done by this API.
+	Parameters:
+		vsc_addr - Address of the VSC device on board.
...	...	@@ -53,6 +53,7 @@
53	53	COBJS-$(CONFIG_P3041DS) += ics307_clk.o
54	54	COBJS-$(CONFIG_P4080DS) += ics307_clk.o
55	55	COBJS-$(CONFIG_P5020DS) += ics307_clk.o
	56	+COBJS-$(CONFIG_VSC_CROSSBAR) += vsc3316_3308.o
56	57
57	58	# deal with common files for P-series corenet based devices
58	59	SUBLIB-$(CONFIG_P2041RDB) += p_corenet/libp_corenet.o
	1	+/*
	2	+ * Copyright 2012 Freescale Semiconductor, Inc.
	3	+ *
	4	+ * See file CREDITS for list of people who contributed to this
	5	+ * project.
	6	+ *
	7	+ * This program is free software; you can redistribute it and/or
	8	+ * modify it under the terms of the GNU General Public License as
	9	+ * published by the Free Software Foundation; either version 2 of
	10	+ * the License, or (at your option) any later version.
	11	+ *
	12	+ * This program is distributed in the hope that it will be useful,
	13	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	+ * GNU General Public License for more details.
	16	+ *
	17	+ * You should have received a copy of the GNU General Public License
	18	+ * along with this program; if not, write to the Free Software
	19	+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	20	+ * MA 02111-1307 USA
	21	+ */
	22	+
	23	+#include "vsc3316_3308.h"
	24	+
	25	+#define REVISION_ID_REG 0x7E
	26	+#define INTERFACE_MODE_REG 0x79
	27	+#define CURRENT_PAGE_REGISTER 0x7F
	28	+#define CONNECTION_CONFIG_PAGE 0x00
	29	+#define INPUT_STATE_REG 0x13
	30	+#define GLOBAL_INPUT_ISE1 0x51
	31	+#define GLOBAL_INPUT_ISE2 0x52
	32	+#define GLOBAL_INPUT_LOS 0x55
	33	+#define GLOBAL_CORE_CNTRL 0x5D
	34	+#define OUTPUT_MODE_PAGE 0x23
	35	+#define CORE_CONTROL_PAGE 0x25
	36	+#define CORE_CONFIG_REG 0x75
	37	+
	38	+int vsc_if_enable(unsigned int vsc_addr)
	39	+{
	40	+ u8 data;
	41	+
	42	+ debug("VSC:Configuring VSC at I2C address 0x%2x"
	43	+ " for 2-wire interface\n", vsc_addr);
	44	+
	45	+ /* enable 2-wire Serial InterFace (I2C) */
	46	+ data = 0x02;
	47	+ return i2c_write(vsc_addr, INTERFACE_MODE_REG, 1, &data, 1);
	48	+}
	49	+
	50	+int vsc3316_config(unsigned int vsc_addr, const int8_t con_arr[][2],
	51	+ unsigned int num_con)
	52	+{
	53	+ unsigned int i;
	54	+ u8 rev_id = 0;
	55	+ int ret;
	56	+
	57	+ debug("VSC:Initializing VSC3316 at I2C address 0x%2x"
	58	+ " for Tx\n", vsc_addr);
	59	+
	60	+ ret = i2c_read(vsc_addr, REVISION_ID_REG, 1, &rev_id, 1);
	61	+ if (ret < 0) {
	62	+ printf("VSC:0x%x could not read REV_ID from device.\n",
	63	+ vsc_addr);
	64	+ return ret;
	65	+ }
	66	+
	67	+ if (rev_id != 0xab) {
	68	+ printf("VSC: device at address 0x%x is not VSC3316/3308.\n",
	69	+ vsc_addr);
	70	+ return -ENODEV;
	71	+ }
	72	+
	73	+ ret = vsc_if_enable(vsc_addr);
	74	+ if (ret) {
	75	+ printf("VSC:0x%x could not configured for 2-wire I/F.\n",
	76	+ vsc_addr);
	77	+ return ret;
	78	+ }
	79	+
	80	+ /* config connections - page 0x00 */
	81	+ i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, CONNECTION_CONFIG_PAGE);
	82	+
	83	+ /* Making crosspoint connections, by connecting required
	84	+ * input to output */
	85	+ for (i = 0; i < num_con ; i++)
	86	+ i2c_reg_write(vsc_addr, con_arr[i][1], con_arr[i][0]);
	87	+
	88	+ /* input state - page 0x13 */
	89	+ i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, INPUT_STATE_REG);
	90	+ /* Configuring the required input of the switch */
	91	+ for (i = 0; i < num_con ; i++)
	92	+ i2c_reg_write(vsc_addr, con_arr[i][0], 0x80);
	93	+
	94	+ /* Setting Global Input LOS threshold value */
	95	+ i2c_reg_write(vsc_addr, GLOBAL_INPUT_LOS, 0x60);
	96	+
	97	+ /* config output mode - page 0x23 */
	98	+ i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, OUTPUT_MODE_PAGE);
	99	+ /* Turn ON the Output driver correspond to required output*/
	100	+ for (i = 0; i < num_con ; i++)
	101	+ i2c_reg_write(vsc_addr, con_arr[i][1], 0);
	102	+
	103	+ /* configure global core control register, Turn on Global core power */
	104	+ i2c_reg_write(vsc_addr, GLOBAL_CORE_CNTRL, 0);
	105	+
	106	+ vsc_wp_config(vsc_addr);
	107	+
	108	+ return 0;
	109	+}
	110	+
	111	+int vsc3308_config(unsigned int vsc_addr, const int8_t con_arr[][2],
	112	+ unsigned int num_con)
	113	+{
	114	+ unsigned int i;
	115	+ u8 rev_id = 0;
	116	+ int ret;
	117	+
	118	+ debug("VSC:Initializing VSC3308 at I2C address 0x%x"
	119	+ " for Tx\n", vsc_addr);
	120	+
	121	+ ret = i2c_read(vsc_addr, REVISION_ID_REG, 1, &rev_id, 1);
	122	+ if (ret < 0) {
	123	+ printf("VSC:0x%x could not read REV_ID from device.\n",
	124	+ vsc_addr);
	125	+ return ret;
	126	+ }
	127	+
	128	+ if (rev_id != 0xab) {
	129	+ printf("VSC: device at address 0x%x is not VSC3316/3308.\n",
	130	+ vsc_addr);
	131	+ return -ENODEV;
	132	+ }
	133	+
	134	+ ret = vsc_if_enable(vsc_addr);
	135	+ if (ret) {
	136	+ printf("VSC:0x%x could not configured for 2-wire I/F.\n",
	137	+ vsc_addr);
	138	+ return ret;
	139	+ }
	140	+
	141	+ /* config connections - page 0x00 */
	142	+ i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, CONNECTION_CONFIG_PAGE);
	143	+
	144	+ /* Making crosspoint connections, by connecting required
	145	+ * input to output */
	146	+ for (i = 0; i < num_con ; i++)
	147	+ i2c_reg_write(vsc_addr, con_arr[i][1], con_arr[i][0]);
	148	+
	149	+ /Configure Global Input ISE and gain /
	150	+ i2c_reg_write(vsc_addr, GLOBAL_INPUT_ISE1, 0x12);
	151	+ i2c_reg_write(vsc_addr, GLOBAL_INPUT_ISE2, 0x12);
	152	+
	153	+ /* input state - page 0x13 */
	154	+ i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, INPUT_STATE_REG);
	155	+ /* Turning ON the required input of the switch */
	156	+ for (i = 0; i < num_con ; i++)
	157	+ i2c_reg_write(vsc_addr, con_arr[i][0], 0);
	158	+
	159	+ /* Setting Global Input LOS threshold value */
	160	+ i2c_reg_write(vsc_addr, GLOBAL_INPUT_LOS, 0x60);
	161	+
	162	+ /* config output mode - page 0x23 */
	163	+ i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, OUTPUT_MODE_PAGE);
	164	+ /* Turn ON the Output driver correspond to required output*/
	165	+ for (i = 0; i < num_con ; i++)
	166	+ i2c_reg_write(vsc_addr, con_arr[i][1], 0);
	167	+
	168	+ /* configure global core control register, Turn on Global core power */
	169	+ i2c_reg_write(vsc_addr, GLOBAL_CORE_CNTRL, 0);
	170	+
	171	+ vsc_wp_config(vsc_addr);
	172	+
	173	+ return 0;
	174	+}
	175	+
	176	+void vsc_wp_config(unsigned int vsc_addr)
	177	+{
	178	+ debug("VSC:Configuring VSC at address:0x%x for WP\n", vsc_addr);
	179	+
	180	+ /* For new crosspoint configuration to occur, WP bit of
	181	+ * CORE_CONFIG_REG should be set 1 and then reset to 0 */
	182	+ i2c_reg_write(vsc_addr, CORE_CONFIG_REG, 0x01);
	183	+ i2c_reg_write(vsc_addr, CORE_CONFIG_REG, 0x0);
	184	+}
	1	+This file contains API information of the initialization code written for
	2	+Vitesse cross-point devices, VSC3316 and VSC3308 for board B4860QDS
	3	+
	4	+Author: Shaveta Leekha <shaveta@freescale.com>
	5	+
	6	+About Device:
	7	+=============
	8	+VSC 3316/3308 is a low-power, low-cost asynchronous crosspoint switch capable of data rates upto 11.5Gbps.
	9	+
	10	+VSC3316 has 16 input and 16 output ports whereas VSC3308 has 8 input and 8 output ports. Programming of these devices are performed by two-wire or four-wire serial interface.
	11	+
	12	+Initialization:
	13	+===============
	14	+On reset, VSC devices are in low-power state with all inputs, outputs and connections in an off state.
	15	+First thing required is to program it to interface with either two-wire or four-wire interface.
	16	+In our case the interface is two-wire I2C serial interface. So the value in Interface mode register at address 79.h to be written is 0x02 for two-wire interface. Also for crosspoint connections to be activated, 01.h value need to be written in 75.h (core configuration register).
	17	+
	18	+API Overview:
	19	+=============
	20	+
	21	+ vsc_if_enable(u8 vsc_addr):
	22	+ --------------------------
	23	+ This API programs VSC to interface with either two-wire or four-wire interface. In our case the interface is two-wire I2C serial interface. So the value in Interface mode register at address 79.h to be written is 0x02 for two-wire interface.
	24	+ Parameters:
	25	+ vsc_addr - Address of the VSC device on board.
	26	+
	27	+
	28	+ vsc3316_config(u8 vsc_addr, int con_arr[][2], u8 num_con):
	29	+ ---------------------------------------------------------
	30	+ This API configures the VSC3316 device for required connections. Connection through the VSC device requires the inputs and outputs to be properly configured.
	31	+ Connection registers are on page 00. It Configures the selected input and output correctly and join them to make a connection. It also program Input state register, Global input ISE, Global input LOS, Global core control, Output mode register and core control registers etc.
	32	+ vsc3308_config(u8 vsc_addr, int con_arr[][2], u8 num_con) does the essential configurations for VSC3308.
	33	+
	34	+ Parameters:
	35	+ vsc_addr - Address of the VSC device on board.
	36	+ con_arr - connection array
	37	+ num_con - number of connections to be configured
	38	+
	39	+ vsc_wp_config(u8 vsc_addr):
	40	+ --------------------------
	41	+ For crosspoint connections to be activated, 01.h value need to be written in 75.h (core configuration register), which is done by this API.
	42	+ Parameters:
	43	+ vsc_addr - Address of the VSC device on board.