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#ifndef _LINUX_ETRAXVIRTEX_FPGA_H
#define _LINUX_ETRAXVIRTEX_FPGA_H
 
/* etraxvirtex_fpga _IOC_TYPE, bits 8 to 15 in ioctl cmd */
 
#define ETRAXVIRTEX_FPGA_IOCTYPE 45
 
/* supported ioctl _IOC_NR's */
 
/* in write operations, the argument contains both virtex
 * register and value.
 */
 
#define VIRTEX_FPGA_WRITEARG(reg, value) (((reg) << 16) | (value))
#define VIRTEX_FPGA_READARG(reg) ((reg) << 16)
 
#define VIRTEX_FPGA_ARGREG(arg) (((arg) >> 16) & 0x0fff)
#define VIRTEX_FPGA_ARGVALUE(arg) ((arg) & 0xffff)
 
#define VIRTEX_FPGA_WRITEREG 0x1   /* write to an (FPGA implemented) register */
#define VIRTEX_FPGA_READREG  0x2   /* read from an (FPGA implemented register */
 
/*
EXAMPLE usage:
 
    virtex_arg = VIRTEX_FPGA_WRITEARG( reg, val);
    ioctl(fd, _IO(ETRAXVIRTEX_FPGA_IOCTYPE, VIRTEX_FPGA_WRITEREG), virtex_arg);
 
    virtex_arg = VIRTEX_FPGA_READARG( reg);
    val = ioctl(fd, _IO(ETRAXVIRTEX_FPGA_IOCTYPE, VIRTEX_FPGA_READREG), virtex_arg);
 
*/
#endif