1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2016 Rockchip Electronics Co., Ltd
10 #include <linux/delay.h>
12 #include "../gadget/dwc2_udc_otg_priv.h"
14 DECLARE_GLOBAL_DATA_PTR;
16 #define BIT_WRITEABLE_SHIFT 16
21 unsigned int bitstart;
27 * struct rockchip_usb2_phy_cfg: usb-phy port configuration
28 * @port_reset: usb otg per-port reset register
29 * @soft_con: software control usb otg register
30 * @suspend: phy suspend register
32 struct rockchip_usb2_phy_cfg {
33 struct usb2phy_reg port_reset;
34 struct usb2phy_reg soft_con;
35 struct usb2phy_reg suspend;
38 struct rockchip_usb2_phy_dt_id {
43 static const struct rockchip_usb2_phy_cfg rk3288_pdata = {
44 .port_reset = {0x00, 12, 12, 0, 1},
45 .soft_con = {0x08, 2, 2, 0, 1},
46 .suspend = {0x0c, 5, 0, 0x01, 0x2A},
49 static struct rockchip_usb2_phy_dt_id rockchip_usb2_phy_dt_ids[] = {
50 { .compatible = "rockchip,rk3288-usb-phy", .data = &rk3288_pdata },
54 static void property_enable(struct dwc2_plat_otg_data *pdata,
55 const struct usb2phy_reg *reg, bool en)
57 unsigned int val, mask, tmp;
59 tmp = en ? reg->enable : reg->disable;
60 mask = GENMASK(reg->bitend, reg->bitstart);
61 val = (tmp << reg->bitstart) | (mask << BIT_WRITEABLE_SHIFT);
63 writel(val, pdata->regs_phy + reg->offset);
67 void otg_phy_init(struct dwc2_udc *dev)
69 struct dwc2_plat_otg_data *pdata = dev->pdata;
70 struct rockchip_usb2_phy_cfg *phy_cfg = NULL;
71 struct rockchip_usb2_phy_dt_id *of_id;
74 for (i = 0; i < ARRAY_SIZE(rockchip_usb2_phy_dt_ids); i++) {
75 of_id = &rockchip_usb2_phy_dt_ids[i];
76 if (ofnode_device_is_compatible(pdata->phy_of_node,
78 phy_cfg = (struct rockchip_usb2_phy_cfg *)of_id->data;
83 debug("Can't find device platform data\n");
88 pdata->priv = phy_cfg;
89 /* disable software control */
90 property_enable(pdata, &phy_cfg->soft_con, false);
93 property_enable(pdata, &phy_cfg->port_reset, true);
95 property_enable(pdata, &phy_cfg->port_reset, false);
99 void otg_phy_off(struct dwc2_udc *dev)
101 struct dwc2_plat_otg_data *pdata = dev->pdata;
102 struct rockchip_usb2_phy_cfg *phy_cfg = pdata->priv;
104 /* enable software control */
105 property_enable(pdata, &phy_cfg->soft_con, true);
107 property_enable(pdata, &phy_cfg->suspend, true);