FPGA_MODE
iowrite32(1, card->config_regs + FPGA_MODE);
ioread32(card->config_regs + FPGA_MODE);
iowrite32(0, card->config_regs + FPGA_MODE);
ioread32(card->config_regs + FPGA_MODE);
iowrite32(1, card->config_regs + FPGA_MODE);
(void)ioread32(card->config_regs + FPGA_MODE);
iowrite32(0, card->config_regs + FPGA_MODE);
(void)ioread32(card->config_regs + FPGA_MODE);
iowrite32(1, card->config_regs + FPGA_MODE);
(void) ioread32(card->config_regs + FPGA_MODE);
iowrite32(0, card->config_regs + FPGA_MODE);