1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (C) 2020 MediaTek Inc. All Rights Reserved. 4 * 5 * Author: Weijie Gao <weijie.gao@mediatek.com> 6 */ 7 8#include <clk.h> 9#include <dm.h> 10#include <generic-phy.h> 11#include <misc.h> 12#include <reset.h> 13#include <dm/device_compat.h> 14#include <linux/delay.h> 15#include <mach/mt7620-sysc.h> 16 17struct mt7620_usb_phy { 18 struct udevice *sysc; 19 struct clk_bulk clocks; 20 struct reset_ctl_bulk resets; 21}; 22 23static int mt7620_usb_phy_power_on(struct phy *_phy) 24{ 25 struct mt7620_usb_phy *phy = dev_get_priv(_phy->dev); 26 u32 mode = MT7620_SYSC_USB_HOST_MODE; 27 int ret; 28 29 reset_deassert_bulk(&phy->resets); 30 31 clk_enable_bulk(&phy->clocks); 32 33 mdelay(10); 34 35 ret = misc_ioctl(phy->sysc, MT7620_SYSC_IOCTL_SET_USB_MODE, &mode); 36 if (ret) { 37 dev_err(_phy->dev, 38 "mt7620_usbphy: failed to set USB host mode\n"); 39 return ret; 40 } 41 42 mdelay(10); 43 44 return 0; 45} 46 47static int mt7620_usb_phy_power_off(struct phy *_phy) 48{ 49 struct mt7620_usb_phy *phy = dev_get_priv(_phy->dev); 50 51 clk_disable_bulk(&phy->clocks); 52 53 reset_assert_bulk(&phy->resets); 54 55 return 0; 56} 57 58static int mt7620_usb_phy_probe(struct udevice *dev) 59{ 60 struct mt7620_usb_phy *phy = dev_get_priv(dev); 61 struct ofnode_phandle_args sysc_args; 62 int ret; 63 64 ret = ofnode_parse_phandle_with_args(dev_ofnode(dev), "mediatek,sysc", NULL, 65 0, 0, &sysc_args); 66 if (ret) { 67 dev_err(dev, "mt7620_usbphy: sysc property not found\n"); 68 return ret; 69 } 70 71 ret = uclass_get_device_by_ofnode(UCLASS_MISC, sysc_args.node, 72 &phy->sysc); 73 if (ret) { 74 dev_err(dev, "mt7620_usbphy: failed to sysc device\n"); 75 return ret; 76 } 77 78 ret = clk_get_bulk(dev, &phy->clocks); 79 if (ret) { 80 dev_err(dev, "mt7620_usbphy: failed to get clocks\n"); 81 return ret; 82 } 83 84 ret = reset_get_bulk(dev, &phy->resets); 85 if (ret) { 86 dev_err(dev, "mt7620_usbphy: failed to get reset control\n"); 87 return ret; 88 } 89 90 return 0; 91} 92 93static struct phy_ops mt7620_usb_phy_ops = { 94 .power_on = mt7620_usb_phy_power_on, 95 .power_off = mt7620_usb_phy_power_off, 96}; 97 98static const struct udevice_id mt7620_usb_phy_ids[] = { 99 { .compatible = "mediatek,mt7620-usbphy" }, 100 { } 101}; 102 103U_BOOT_DRIVER(mt7620_usb_phy) = { 104 .name = "mt7620_usb_phy", 105 .id = UCLASS_PHY, 106 .of_match = mt7620_usb_phy_ids, 107 .ops = &mt7620_usb_phy_ops, 108 .probe = mt7620_usb_phy_probe, 109 .priv_auto = sizeof(struct mt7620_usb_phy), 110}; 111