static int do_copro_command()

in fsi-master-ast-cf.c [307:342]

• 28 lines of code
• 9 McCabe index (conditional complexity)

static int do_copro_command(struct fsi_master_acf *master, uint32_t op)
{
	uint32_t timeout = 10000000;
	uint8_t stat;

	trace_fsi_master_acf_copro_command(master, op);

	/* Send command */
	iowrite32be(op, master->sram + CMD_STAT_REG);

	/* Ring doorbell if any */
	if (master->cvic)
		iowrite32(0x2, master->cvic + CVIC_TRIG_REG);

	/* Wait for status to indicate completion (or error) */
	do {
		if (timeout-- == 0) {
			dev_warn(master->dev,
				 "Timeout waiting for coprocessor completion\n");
			return -ETIMEDOUT;
		}
		stat = ioread8(master->sram + CMD_STAT_REG);
	} while(stat < STAT_COMPLETE || stat == 0xff);

	if (stat == STAT_COMPLETE)
		return 0;
	switch(stat) {
	case STAT_ERR_INVAL_CMD:
		return -EINVAL;
	case STAT_ERR_INVAL_IRQ:
		return -EIO;
	case STAT_ERR_MTOE:
		return -ESHUTDOWN;
	}
	return -ENXIO;
}