static int intel_reg_show()

in intel.c [124:189]

• 49 lines of code
• 6 McCabe index (conditional complexity)

static int intel_reg_show(struct seq_file *s_file, void *data)
{
	struct sdw_intel *sdw = s_file->private;
	void __iomem *s = sdw->link_res->shim;
	void __iomem *a = sdw->link_res->alh;
	char *buf;
	ssize_t ret;
	int i, j;
	unsigned int links, reg;

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

	links = intel_readl(s, SDW_SHIM_LCAP) & GENMASK(2, 0);

	ret = scnprintf(buf, RD_BUF, "Register  Value\n");
	ret += scnprintf(buf + ret, RD_BUF - ret, "\nShim\n");

	for (i = 0; i < links; i++) {
		reg = SDW_SHIM_LCAP + i * 4;
		ret += intel_sprintf(s, true, buf, ret, reg);
	}

	for (i = 0; i < links; i++) {
		ret += scnprintf(buf + ret, RD_BUF - ret, "\nLink%d\n", i);
		ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLSCAP(i));
		ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS0CM(i));
		ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS1CM(i));
		ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS2CM(i));
		ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTLS3CM(i));
		ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_PCMSCAP(i));

		ret += scnprintf(buf + ret, RD_BUF - ret, "\n PCMSyCH registers\n");

		/*
		 * the value 10 is the number of PDIs. We will need a
		 * cleanup to remove hard-coded Intel configurations
		 * from cadence_master.c
		 */
		for (j = 0; j < 10; j++) {
			ret += intel_sprintf(s, false, buf, ret,
					SDW_SHIM_PCMSYCHM(i, j));
			ret += intel_sprintf(s, false, buf, ret,
					SDW_SHIM_PCMSYCHC(i, j));
		}
		ret += scnprintf(buf + ret, RD_BUF - ret, "\n PDMSCAP, IOCTL, CTMCTL\n");

		ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_PDMSCAP(i));
		ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_IOCTL(i));
		ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_CTMCTL(i));
	}

	ret += scnprintf(buf + ret, RD_BUF - ret, "\nWake registers\n");
	ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_WAKEEN);
	ret += intel_sprintf(s, false, buf, ret, SDW_SHIM_WAKESTS);

	ret += scnprintf(buf + ret, RD_BUF - ret, "\nALH STRMzCFG\n");
	for (i = 0; i < SDW_ALH_NUM_STREAMS; i++)
		ret += intel_sprintf(a, true, buf, ret, SDW_ALH_STRMZCFG(i));

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

	return 0;
}