marvell/services/audio_if/debug_spi_slic.c

#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>

#define SI_SPI_BASE_DEV "/dev/spidev1.0"

#define CHAN_NUM_TO_CID(c)   ((((c) << 4) & 0x10) | \
        (((c) << 2) & 0x8)  | \
        (((c) >> 2) & 0x2)  | \
        (((c) >> 4) & 0x1)  | \
        ((c) & 0x4))

static char slic_read_reg(int fd, char channel, char regAddr)
{
    char buf[3];
    char data;

    memset(buf, 0x00, sizeof(buf));

    /* Convert channel to CID and or in the read bit */
    buf[0] = CHAN_NUM_TO_CID(channel) | 0x60;
    buf[1] = regAddr;

    write(fd, buf,2);
    read(fd, &data,1);

    return data;
}

static char slic_write_reg(int fd, char channel, char regAddr, char regVal)
{
    char buf[3];

    memset(buf, 0x00, sizeof(buf));

    /* Convert channel to CID and or in the read bit */
    buf[0] = CHAN_NUM_TO_CID(channel) | 0x20;
    buf[1] = regAddr;
    buf[2] = regVal;

    write(fd, buf, 3);

    return 0;
}

int main(int argc, char **argv)
{
    int i=0;
    int fd = 0;
    char dev_name[20] = {0}; 
    char channel = 0;
    char reg = 0x00;/* slic ID */
    char value = 0;
    int cycle = 0;

    sprintf(dev_name,"%s",SI_SPI_BASE_DEV);
    fd = open(dev_name,O_RDWR,0);
    if (fd < 0)
    {
        printf("fail to open fd.\n");
        return -1;
    }

    if (argc >= 3) {
        /* write the register */
        reg = strtol(argv[1], NULL, 16);
        value = strtol(argv[2], NULL, 16);

        printf("write reg[0x%02x]=[0x%02x].\n", reg, value);
        //slic_write_reg(fd, channel, reg, value);

        while(1)
        {
            sleep(1);

            /* cycle to write */
            slic_write_reg(fd, channel, reg, value);
        }

    } else if (argc == 2) {
        /* read the registers */
        reg = strtol(argv[1], NULL, 16);

        if (0xFF == reg)
        {
            /* dump the registers */
            printf("dump the registers.\n");
        }
        else
        {
            /* cycle to read */
            printf("cycle to read reg[0x%02x].\n", reg);
        }

        while(1)
        {
            sleep(1);

            if (0XFF == reg)
            {
                printf("------dump the registers.-------\n");
                for (i=0; i<127; i++)
                {
                    reg = i;
                    value = slic_read_reg(fd, channel, reg);
                    printf("reg[0x%02x]=[0x%02x].\n", reg, value);
                }

                break;
            }
            else
            {
                value = slic_read_reg(fd, channel, reg);
                printf("reg[0x%02x]=[0x%02x].\n", reg, value);
            }
        }

    } else {
        /* only open fd for test SPI driver */
        while(1)
        {
            sleep(1);
        }
    }

    close(fd);
    return 0;
}