| 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. |
