LXR linux/include/linux/usb/tegra_usb

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (C) 2010 Google, Inc.
   4 *
   5 * This software is licensed under the terms of the GNU General Public
   6 * License version 2, as published by the Free Software Foundation, and
   7 * may be copied, distributed, and modified under those terms.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 */
  15
  16#ifndef __TEGRA_USB_PHY_H
  17#define __TEGRA_USB_PHY_H
  18
  19#include <linux/clk.h>
  20#include <linux/gpio.h>
  21#include <linux/reset.h>
  22#include <linux/usb/otg.h>
  23
  24/*
  25 * utmi_pll_config_in_car_module: true if the UTMI PLL configuration registers
  26 *     should be set up by clk-tegra, false if by the PHY code
  27 * has_hostpc: true if the USB controller has the HOSTPC extension, which
  28 *     changes the location of the PHCD and PTS fields
  29 * requires_usbmode_setup: true if the USBMODE register needs to be set to
  30 *      enter host mode
  31 * requires_extra_tuning_parameters: true if xcvr_hsslew, hssquelch_level
  32 *      and hsdiscon_level should be set for adequate signal quality
  33 */
  34
  35struct tegra_phy_soc_config {
  36        bool utmi_pll_config_in_car_module;
  37        bool has_hostpc;
  38        bool requires_usbmode_setup;
  39        bool requires_extra_tuning_parameters;
  40};
  41
  42struct tegra_utmip_config {
  43        u8 hssync_start_delay;
  44        u8 elastic_limit;
  45        u8 idle_wait_delay;
  46        u8 term_range_adj;
  47        bool xcvr_setup_use_fuses;
  48        u8 xcvr_setup;
  49        u8 xcvr_lsfslew;
  50        u8 xcvr_lsrslew;
  51        u8 xcvr_hsslew;
  52        u8 hssquelch_level;
  53        u8 hsdiscon_level;
  54};
  55
  56enum tegra_usb_phy_port_speed {
  57        TEGRA_USB_PHY_PORT_SPEED_FULL = 0,
  58        TEGRA_USB_PHY_PORT_SPEED_LOW,
  59        TEGRA_USB_PHY_PORT_SPEED_HIGH,
  60};
  61
  62struct tegra_xtal_freq;
  63
  64struct tegra_usb_phy {
  65        int instance;
  66        const struct tegra_xtal_freq *freq;
  67        void __iomem *regs;
  68        void __iomem *pad_regs;
  69        struct clk *clk;
  70        struct clk *pll_u;
  71        struct clk *pad_clk;
  72        struct regulator *vbus;
  73        enum usb_dr_mode mode;
  74        void *config;
  75        const struct tegra_phy_soc_config *soc_config;
  76        struct usb_phy *ulpi;
  77        struct usb_phy u_phy;
  78        bool is_legacy_phy;
  79        bool is_ulpi_phy;
  80        struct gpio_desc *reset_gpio;
  81        struct reset_control *pad_rst;
  82        bool wakeup_enabled;
  83        bool pad_wakeup;
  84        bool powered_on;
  85};
  86
  87void tegra_usb_phy_preresume(struct usb_phy *phy);
  88
  89void tegra_usb_phy_postresume(struct usb_phy *phy);
  90
  91void tegra_ehci_phy_restore_start(struct usb_phy *phy,
  92                                 enum tegra_usb_phy_port_speed port_speed);
  93
  94void tegra_ehci_phy_restore_end(struct usb_phy *phy);
  95
  96#endif /* __TEGRA_USB_PHY_H */
  97