| #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 |
