os/linux-2.6-tag--devboard-R2_10-4/arch/cris/arch-v32/drivers/elphel/fpga_io.h

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//fpga_io.h

int fpga_io_ioctl(struct inode *inode, struct file *file,  unsigned int cmd, unsigned long arg);

int fpga_io_open(void);
int fpga_io_close (void);

/* added read/write/lseek to read and write FPGA registers
 * write fromat (6 bytes per write):
 * byte 0 - address LSB
 * byte 1 - address MSB (high bit - 0 - ~=writereg, 1 -~=writereg4)
 * byte 2 - data LSB
 * ...
 * byte 5 - data MSB
 *
 * for reading registers - use lseek to 16-bit address (high bit readreg/readreg4)
 * byte address (for write - 32-bit address)
 * read data - 4 bytes (LSB first), reading again will not autoincrement registers
 *
 */
ssize_t fpga_io_write  (struct file * file, const char * buf, size_t count, loff_t *off);
loff_t  fpga_io_lseek  (struct file * file, loff_t offset, int orig);
ssize_t fpga_io_read   (struct file * file, char * buf, size_t count, loff_t *off);

extern void fpga_table_write(unsigned long fpga_addr, unsigned long *data, int length);

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