int ps3_set_signal()

in ps3-lpm.c [764:823]

• 40 lines of code
• 7 McCabe index (conditional complexity)

int ps3_set_signal(u64 signal_group, u8 signal_bit, u16 sub_unit,
		   u8 bus_word)
{
	int ret;
	u64 lv1_signal_group;
	u64 bus_select;
	u64 signal_select;
	u64 attr1, attr2, attr3;

	if (signal_group == 0)
		return __ps3_set_signal(0, 0, 0, 0, 0, 0);

	lv1_signal_group =
		pm_signal_group_to_ps3_lv1_signal_group(signal_group);
	bus_select = pm_bus_word_to_ps3_lv1_bus_word(bus_word);

	switch (signal_group) {
	case PM_SIG_GROUP_SPU_TRIGGER:
		signal_select = 1;
		signal_select = signal_select << (63 - signal_bit);
		break;
	case PM_SIG_GROUP_SPU_EVENT:
		signal_select = 1;
		signal_select = (signal_select << (63 - signal_bit)) | 0x3;
		break;
	default:
		signal_select = 0;
		break;
	}

	/*
	 * 0: physical object.
	 * 1: logical object.
	 * This parameter is only used for the PPE and SPE signals.
	 */
	attr1 = 1;

	/*
	 * This parameter is used to specify the target physical/logical
	 * PPE/SPE object.
	 */
	if (PM_SIG_GROUP_SPU <= signal_group &&
		signal_group < PM_SIG_GROUP_MFC_MAX)
		attr2 = sub_unit;
	else
		attr2 = lpm_priv->pu_id;

	/*
	 * This parameter is only used for setting the SPE signal.
	 */
	attr3 = 0;

	ret = __ps3_set_signal(lv1_signal_group, bus_select, signal_select,
			       attr1, attr2, attr3);
	if (ret)
		dev_err(sbd_core(), "%s:%u: __ps3_set_signal failed: %d\n",
			__func__, __LINE__, ret);

	return ret;
}