2  * STiH407 family DWC3 specific Glue layer
4  * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
7  * SPDX-License-Identifier:	GPL-2.0+
16 #include <reset-uclass.h>
18 #include <usb.h>
20 #include <linux/usb/dwc3.h>
21 #include <linux/usb/otg.h>
22 #include <dwc3-sti-glue.h>
27  * struct sti_dwc3_glue_platdata - dwc3 STi glue driver private structure
28  * @syscfg_base:	addr for the glue syscfg
29  * @glue_base:		addr for the glue registers
30  * @syscfg_offset:	usb syscfg control offset
48 	val = readl(plat->syscfg_base + plat->syscfg_offset);  in sti_dwc3_glue_drd_init()
52 	switch (plat->mode) {  in sti_dwc3_glue_drd_init()
72 		pr_err("Unsupported mode of operation %d\n", plat->mode);  in sti_dwc3_glue_drd_init()
73 		return -EINVAL;  in sti_dwc3_glue_drd_init()
75 	writel(val, plat->syscfg_base + plat->syscfg_offset);  in sti_dwc3_glue_drd_init()
84 	reg = readl(plat->glue_base + CLKRST_CTRL);  in sti_dwc3_glue_init()
89 	writel(reg, plat->glue_base + CLKRST_CTRL);  in sti_dwc3_glue_init()
92 	reg = readl(plat->glue_base + USB2_VBUS_MNGMNT_SEL1);  in sti_dwc3_glue_init()
98 	writel(reg, plat->glue_base + USB2_VBUS_MNGMNT_SEL1);  in sti_dwc3_glue_init()
100 	setbits_le32(plat->glue_base + CLKRST_CTRL, SW_PIPEW_RESET_N);  in sti_dwc3_glue_init()
111 	ret = ofnode_read_u32_array(dev->node, "reg", reg, ARRAY_SIZE(reg));  in sti_dwc3_glue_ofdata_to_platdata()
113 		pr_err("unable to find st,stih407-dwc3 reg property(%d)\n", ret);  in sti_dwc3_glue_ofdata_to_platdata()
117 	plat->glue_base = reg[0];  in sti_dwc3_glue_ofdata_to_platdata()
118 	plat->syscfg_offset = reg[2];  in sti_dwc3_glue_ofdata_to_platdata()
128 	/* get syscfg-reg base address */  in sti_dwc3_glue_ofdata_to_platdata()
132 		return -ENODEV;  in sti_dwc3_glue_ofdata_to_platdata()
134 	plat->syscfg_base = regmap->base;  in sti_dwc3_glue_ofdata_to_platdata()
137 	ret = reset_get_by_name(dev, "powerdown", &plat->powerdown_ctl);  in sti_dwc3_glue_ofdata_to_platdata()
139 		pr_err("can't get powerdown reset for %s (%d)", dev->name, ret);  in sti_dwc3_glue_ofdata_to_platdata()
144 	ret = reset_get_by_name(dev, "softreset", &plat->softreset_ctl);  in sti_dwc3_glue_ofdata_to_platdata()
146 		pr_err("can't get soft reset for %s (%d)", dev->name, ret);  in sti_dwc3_glue_ofdata_to_platdata()
157 	ofnode_for_each_subnode(node, dev->node) {  in sti_dwc3_glue_bind()
163 		pr_err("Can't find dwc3 subnode for %s\n", dev->name);  in sti_dwc3_glue_bind()
164 		return -ENODEV;  in sti_dwc3_glue_bind()
168 	plat->mode = usb_get_dr_mode(dwc3_node);  in sti_dwc3_glue_bind()
169 	if (plat->mode == USB_DR_MODE_UNKNOWN)  in sti_dwc3_glue_bind()
171 		plat->mode = USB_DR_MODE_HOST;  in sti_dwc3_glue_bind()
182 	ret = reset_deassert(&plat->powerdown_ctl);  in sti_dwc3_glue_probe()
188 	ret = reset_deassert(&plat->softreset_ctl);  in sti_dwc3_glue_probe()
203 	ret = reset_assert(&plat->softreset_ctl);  in sti_dwc3_glue_probe()
210 	ret = reset_assert(&plat->powerdown_ctl);  in sti_dwc3_glue_probe()
223 	ret = reset_assert(&plat->powerdown_ctl);  in sti_dwc3_glue_remove()
229 	ret = reset_assert(&plat->softreset_ctl);  in sti_dwc3_glue_remove()
237 	{ .compatible = "st,stih407-dwc3" },