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>
utp
Shaveta Leekha
Andy Fleming
parent
379c5145ef
commit
aa42cb71fa
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@ -53,6 +53,7 @@ COBJS-$(CONFIG_P2020DS) += ics307_clk.o
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COBJS-$(CONFIG_P3041DS) += ics307_clk.o
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COBJS-$(CONFIG_P4080DS) += ics307_clk.o
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COBJS-$(CONFIG_P5020DS) += ics307_clk.o
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COBJS-$(CONFIG_VSC_CROSSBAR) += vsc3316_3308.o
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# deal with common files for P-series corenet based devices
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SUBLIB-$(CONFIG_P2041RDB) += p_corenet/libp_corenet.o
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@ -0,0 +1,184 @@
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/*
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* Copyright 2012 Freescale Semiconductor, Inc.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include "vsc3316_3308.h"
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#define REVISION_ID_REG 0x7E
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#define INTERFACE_MODE_REG 0x79
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#define CURRENT_PAGE_REGISTER 0x7F
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#define CONNECTION_CONFIG_PAGE 0x00
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#define INPUT_STATE_REG 0x13
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#define GLOBAL_INPUT_ISE1 0x51
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#define GLOBAL_INPUT_ISE2 0x52
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#define GLOBAL_INPUT_LOS 0x55
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#define GLOBAL_CORE_CNTRL 0x5D
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#define OUTPUT_MODE_PAGE 0x23
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#define CORE_CONTROL_PAGE 0x25
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#define CORE_CONFIG_REG 0x75
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int vsc_if_enable(unsigned int vsc_addr)
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{
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u8 data;
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debug("VSC:Configuring VSC at I2C address 0x%2x"
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" for 2-wire interface\n", vsc_addr);
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/* enable 2-wire Serial InterFace (I2C) */
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data = 0x02;
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return i2c_write(vsc_addr, INTERFACE_MODE_REG, 1, &data, 1);
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}
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int vsc3316_config(unsigned int vsc_addr, const int8_t con_arr[][2],
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unsigned int num_con)
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{
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unsigned int i;
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u8 rev_id = 0;
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int ret;
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debug("VSC:Initializing VSC3316 at I2C address 0x%2x"
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" for Tx\n", vsc_addr);
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ret = i2c_read(vsc_addr, REVISION_ID_REG, 1, &rev_id, 1);
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if (ret < 0) {
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printf("VSC:0x%x could not read REV_ID from device.\n",
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vsc_addr);
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return ret;
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}
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if (rev_id != 0xab) {
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printf("VSC: device at address 0x%x is not VSC3316/3308.\n",
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vsc_addr);
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return -ENODEV;
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}
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ret = vsc_if_enable(vsc_addr);
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if (ret) {
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printf("VSC:0x%x could not configured for 2-wire I/F.\n",
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vsc_addr);
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return ret;
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}
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/* config connections - page 0x00 */
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i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, CONNECTION_CONFIG_PAGE);
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/* Making crosspoint connections, by connecting required
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* input to output */
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for (i = 0; i < num_con ; i++)
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i2c_reg_write(vsc_addr, con_arr[i][1], con_arr[i][0]);
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/* input state - page 0x13 */
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i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, INPUT_STATE_REG);
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/* Configuring the required input of the switch */
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for (i = 0; i < num_con ; i++)
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i2c_reg_write(vsc_addr, con_arr[i][0], 0x80);
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/* Setting Global Input LOS threshold value */
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i2c_reg_write(vsc_addr, GLOBAL_INPUT_LOS, 0x60);
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/* config output mode - page 0x23 */
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i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, OUTPUT_MODE_PAGE);
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/* Turn ON the Output driver correspond to required output*/
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for (i = 0; i < num_con ; i++)
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i2c_reg_write(vsc_addr, con_arr[i][1], 0);
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/* configure global core control register, Turn on Global core power */
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i2c_reg_write(vsc_addr, GLOBAL_CORE_CNTRL, 0);
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vsc_wp_config(vsc_addr);
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return 0;
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}
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int vsc3308_config(unsigned int vsc_addr, const int8_t con_arr[][2],
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unsigned int num_con)
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{
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unsigned int i;
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u8 rev_id = 0;
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int ret;
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debug("VSC:Initializing VSC3308 at I2C address 0x%x"
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" for Tx\n", vsc_addr);
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ret = i2c_read(vsc_addr, REVISION_ID_REG, 1, &rev_id, 1);
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if (ret < 0) {
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printf("VSC:0x%x could not read REV_ID from device.\n",
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vsc_addr);
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return ret;
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}
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if (rev_id != 0xab) {
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printf("VSC: device at address 0x%x is not VSC3316/3308.\n",
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vsc_addr);
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return -ENODEV;
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}
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ret = vsc_if_enable(vsc_addr);
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if (ret) {
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printf("VSC:0x%x could not configured for 2-wire I/F.\n",
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vsc_addr);
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return ret;
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}
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/* config connections - page 0x00 */
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i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, CONNECTION_CONFIG_PAGE);
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/* Making crosspoint connections, by connecting required
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* input to output */
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for (i = 0; i < num_con ; i++)
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i2c_reg_write(vsc_addr, con_arr[i][1], con_arr[i][0]);
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/*Configure Global Input ISE and gain */
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i2c_reg_write(vsc_addr, GLOBAL_INPUT_ISE1, 0x12);
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i2c_reg_write(vsc_addr, GLOBAL_INPUT_ISE2, 0x12);
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/* input state - page 0x13 */
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i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, INPUT_STATE_REG);
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/* Turning ON the required input of the switch */
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for (i = 0; i < num_con ; i++)
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i2c_reg_write(vsc_addr, con_arr[i][0], 0);
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/* Setting Global Input LOS threshold value */
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i2c_reg_write(vsc_addr, GLOBAL_INPUT_LOS, 0x60);
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/* config output mode - page 0x23 */
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i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, OUTPUT_MODE_PAGE);
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/* Turn ON the Output driver correspond to required output*/
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for (i = 0; i < num_con ; i++)
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i2c_reg_write(vsc_addr, con_arr[i][1], 0);
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/* configure global core control register, Turn on Global core power */
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i2c_reg_write(vsc_addr, GLOBAL_CORE_CNTRL, 0);
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vsc_wp_config(vsc_addr);
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return 0;
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}
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void vsc_wp_config(unsigned int vsc_addr)
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{
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debug("VSC:Configuring VSC at address:0x%x for WP\n", vsc_addr);
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/* For new crosspoint configuration to occur, WP bit of
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* CORE_CONFIG_REG should be set 1 and then reset to 0 */
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i2c_reg_write(vsc_addr, CORE_CONFIG_REG, 0x01);
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i2c_reg_write(vsc_addr, CORE_CONFIG_REG, 0x0);
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}
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@ -0,0 +1,34 @@
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/*
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* Copyright 2012 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef __VSC_CROSSBAR_H_
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#define __VSC_CROSSBAR_H 1_
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#include <common.h>
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#include <i2c.h>
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#include <errno.h>
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int vsc_if_enable(unsigned int vsc_addr);
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int vsc3316_config(unsigned int vsc_addr, const int8_t con_arr[][2],
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unsigned int num_con);
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int vsc3308_config(unsigned int vsc_addr, const int8_t con_arr[][2],
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unsigned int num_con);
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void vsc_wp_config(unsigned int vsc_addr);
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#endif /* __VSC_CROSSBAR_H_ */
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@ -0,0 +1,43 @@
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This file contains API information of the initialization code written for
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Vitesse cross-point devices, VSC3316 and VSC3308 for board B4860QDS
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Author: Shaveta Leekha <shaveta@freescale.com>
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About Device:
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=============
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VSC 3316/3308 is a low-power, low-cost asynchronous crosspoint switch capable of data rates upto 11.5Gbps.
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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.
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Initialization:
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===============
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On reset, VSC devices are in low-power state with all inputs, outputs and connections in an off state.
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First thing required is to program it to interface with either two-wire or four-wire interface.
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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).
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API Overview:
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=============
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vsc_if_enable(u8 vsc_addr):
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--------------------------
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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.
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Parameters:
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vsc_addr - Address of the VSC device on board.
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vsc3316_config(u8 vsc_addr, int con_arr[][2], u8 num_con):
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---------------------------------------------------------
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This API configures the VSC3316 device for required connections. Connection through the VSC device requires the inputs and outputs to be properly configured.
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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.
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vsc3308_config(u8 vsc_addr, int con_arr[][2], u8 num_con) does the essential configurations for VSC3308.
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Parameters:
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vsc_addr - Address of the VSC device on board.
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con_arr - connection array
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num_con - number of connections to be configured
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vsc_wp_config(u8 vsc_addr):
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--------------------------
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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.
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Parameters:
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vsc_addr - Address of the VSC device on board.
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