static int cdns_reg_show()

in cadence_master.c [279:351]

• 56 lines of code
• 10 McCabe index (conditional complexity)

static int cdns_reg_show(struct seq_file *s, void *data)
{
	struct sdw_cdns *cdns = s->private;
	char *buf;
	ssize_t ret;
	int num_ports;
	int i, j;

	buf = kzalloc(RD_BUF, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	ret = scnprintf(buf, RD_BUF, "Register  Value\n");
	ret += scnprintf(buf + ret, RD_BUF - ret, "\nMCP Registers\n");
	/* 8 MCP registers */
	for (i = CDNS_MCP_CONFIG; i <= CDNS_MCP_PHYCTRL; i += sizeof(u32))
		ret += cdns_sprintf(cdns, buf, ret, i);

	ret += scnprintf(buf + ret, RD_BUF - ret,
			 "\nStatus & Intr Registers\n");
	/* 13 Status & Intr registers (offsets 0x70 and 0x74 not defined) */
	for (i = CDNS_MCP_STAT; i <=  CDNS_MCP_FIFOSTAT; i += sizeof(u32))
		ret += cdns_sprintf(cdns, buf, ret, i);

	ret += scnprintf(buf + ret, RD_BUF - ret,
			 "\nSSP & Clk ctrl Registers\n");
	ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL0);
	ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_SSP_CTRL1);
	ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL0);
	ret += cdns_sprintf(cdns, buf, ret, CDNS_MCP_CLK_CTRL1);

	ret += scnprintf(buf + ret, RD_BUF - ret,
			 "\nDPn B0 Registers\n");

	num_ports = cdns->num_ports;

	for (i = 0; i < num_ports; i++) {
		ret += scnprintf(buf + ret, RD_BUF - ret,
				 "\nDP-%d\n", i);
		for (j = CDNS_DPN_B0_CONFIG(i);
		     j < CDNS_DPN_B0_ASYNC_CTRL(i); j += sizeof(u32))
			ret += cdns_sprintf(cdns, buf, ret, j);
	}

	ret += scnprintf(buf + ret, RD_BUF - ret,
			 "\nDPn B1 Registers\n");
	for (i = 0; i < num_ports; i++) {
		ret += scnprintf(buf + ret, RD_BUF - ret,
				 "\nDP-%d\n", i);

		for (j = CDNS_DPN_B1_CONFIG(i);
		     j < CDNS_DPN_B1_ASYNC_CTRL(i); j += sizeof(u32))
			ret += cdns_sprintf(cdns, buf, ret, j);
	}

	ret += scnprintf(buf + ret, RD_BUF - ret,
			 "\nDPn Control Registers\n");
	for (i = 0; i < num_ports; i++)
		ret += cdns_sprintf(cdns, buf, ret,
				CDNS_PORTCTRL + i * CDNS_PORT_OFFSET);

	ret += scnprintf(buf + ret, RD_BUF - ret,
			 "\nPDIn Config Registers\n");

	/* number of PDI and ports is interchangeable */
	for (i = 0; i < num_ports; i++)
		ret += cdns_sprintf(cdns, buf, ret, CDNS_PDI_CONFIG(i));

	seq_printf(s, "%s", buf);
	kfree(buf);

	return 0;
}