1 #ifndef _LINUX_ETRAXVIRTEX_FPGA_H
2 #define _LINUX_ETRAXVIRTEX_FPGA_H
4 /* etraxvirtex_fpga _IOC_TYPE, bits 8 to 15 in ioctl cmd */
6 #define ETRAXVIRTEX_FPGA_IOCTYPE 45
8 /* supported ioctl _IOC_NR's */
10 /* in write operations, the argument contains both virtex
14 #define VIRTEX_FPGA_WRITEARG(reg, value) (((reg) << 16) | (value))
15 #define VIRTEX_FPGA_READARG(reg) ((reg) << 16)
17 #define VIRTEX_FPGA_ARGREG(arg) (((arg) >> 16) & 0x0fff)
18 #define VIRTEX_FPGA_ARGVALUE(arg) ((arg) & 0xffff)
20 #define VIRTEX_FPGA_WRITEREG 0x1 /* write to an (FPGA implemented) register */
21 #define VIRTEX_FPGA_READREG 0x2 /* read from an (FPGA implemented register */
26 virtex_arg = VIRTEX_FPGA_WRITEARG( reg, val);
27 ioctl(fd, _IO(ETRAXVIRTEX_FPGA_IOCTYPE, VIRTEX_FPGA_WRITEREG), virtex_arg);
29 virtex_arg = VIRTEX_FPGA_READARG( reg);
30 val = ioctl(fd, _IO(ETRAXVIRTEX_FPGA_IOCTYPE, VIRTEX_FPGA_READREG), virtex_arg);