1 // SPDX-License-Identifier: GPL-2.0
3  * mtu3_dr.c - dual role switch and host glue layer
38  * ip-sleep wakeup mode:
39  * all clocks can be turn off, but power domain should be kept on
45 	switch (ssusb->uwk_vers) {  in ssusb_wakeup_ip_sleep_set()
47 		reg = ssusb->uwk_reg_base + PERI_WK_CTRL1;  in ssusb_wakeup_ip_sleep_set()
52 		reg = ssusb->uwk_reg_base + PERI_SSUSB_SPM_CTRL;  in ssusb_wakeup_ip_sleep_set()
59 	regmap_update_bits(ssusb->uwk, reg, msk, val);  in ssusb_wakeup_ip_sleep_set()
69 	ssusb->uwk_en = of_property_read_bool(dn, "wakeup-source");  in ssusb_wakeup_of_property_parse()
70 	if (!ssusb->uwk_en)  in ssusb_wakeup_of_property_parse()
74 				"mediatek,syscon-wakeup", 2, 0, &args);  in ssusb_wakeup_of_property_parse()
78 	ssusb->uwk_reg_base = args.args[0];  in ssusb_wakeup_of_property_parse()
79 	ssusb->uwk_vers = args.args[1];  in ssusb_wakeup_of_property_parse()
80 	ssusb->uwk = syscon_node_to_regmap(args.np);  in ssusb_wakeup_of_property_parse()
82 	dev_info(ssusb->dev, "uwk - reg:0x%x, version:%d\n",  in ssusb_wakeup_of_property_parse()
83 			ssusb->uwk_reg_base, ssusb->uwk_vers);  in ssusb_wakeup_of_property_parse()
85 	return PTR_ERR_OR_ZERO(ssusb->uwk);  in ssusb_wakeup_of_property_parse()
90 	if (ssusb->uwk_en)  in ssusb_wakeup_set()
98 	xhci_cap = mtu3_readl(ssusb->ippc_base, U3D_SSUSB_IP_XHCI_CAP);  in host_ports_num_get()
99 	ssusb->u2_ports = SSUSB_IP_XHCI_U2_PORT_NUM(xhci_cap);  in host_ports_num_get()
100 	ssusb->u3_ports = SSUSB_IP_XHCI_U3_PORT_NUM(xhci_cap);  in host_ports_num_get()
102 	dev_dbg(ssusb->dev, "host - u2_ports:%d, u3_ports:%d\n",  in host_ports_num_get()
103 		 ssusb->u2_ports, ssusb->u3_ports);  in host_ports_num_get()
109 	void __iomem *ibase = ssusb->ippc_base;  in ssusb_host_enable()
110 	int num_u3p = ssusb->u3_ports;  in ssusb_host_enable()
111 	int num_u2p = ssusb->u2_ports;  in ssusb_host_enable()
117 	/* power on host ip */  in ssusb_host_enable()
120 	/* power on and enable u3 ports except skipped ones */  in ssusb_host_enable()
123 		if ((0x1 << i) & ssusb->u3p_dis_msk) {  in ssusb_host_enable()
134 	/* power on and enable all u2 ports */  in ssusb_host_enable()
149 int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend)  in ssusb_host_disable()  argument
151 	void __iomem *ibase = ssusb->ippc_base;  in ssusb_host_disable()
152 	int num_u3p = ssusb->u3_ports;  in ssusb_host_disable()
153 	int num_u2p = ssusb->u2_ports;  in ssusb_host_disable()
158 	/* power down and disable u3 ports except skipped ones */  in ssusb_host_disable()
160 		if ((0x1 << i) & ssusb->u3p_dis_msk)  in ssusb_host_disable()
165 		value |= suspend ? 0 : SSUSB_U3_PORT_DIS;  in ssusb_host_disable()
169 	/* power down and disable all u2 ports */  in ssusb_host_disable()
173 		value |= suspend ? 0 : SSUSB_U2_PORT_DIS;  in ssusb_host_disable()
177 	/* power down host ip */  in ssusb_host_disable()
180 	if (!suspend)  in ssusb_host_disable()
187 		dev_err(ssusb->dev, "ip sleep failed!!!\n");  in ssusb_host_disable()
194 	struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;  in ssusb_host_setup()
199 	 * power on host and power on/enable all ports  in ssusb_host_setup()
204 	if (otg_sx->manual_drd_enabled)  in ssusb_host_setup()
207 	/* if port0 supports dual-role, works as host mode by default */  in ssusb_host_setup()
208 	ssusb_set_vbus(&ssusb->otg_switch, 1);  in ssusb_host_setup()
213 	if (ssusb->is_host)  in ssusb_host_cleanup()
214 		ssusb_set_vbus(&ssusb->otg_switch, 0);  in ssusb_host_cleanup()
221  * which supports OTG are better to be enabled by default in DTS.
222  * Because the host driver will keep link with devices attached when system
223  * enters suspend mode, so no need to control VBUSes after initialization.
227 	struct device *parent_dev = ssusb->dev;  in ssusb_host_init()
246 	of_platform_depopulate(ssusb->dev);  in ssusb_host_exit()