Commit 53d2a715 authored by Thierry Reding's avatar Thierry Reding

phy: Add Tegra XUSB pad controller support

Add a new driver for the XUSB pad controller found on NVIDIA Tegra SoCs.
This hardware block used to be exposed as a pin controller, but it turns
out that this isn't a good fit. The new driver and DT binding much more
accurately describe the hardware and are more flexible in supporting new
SoC generations.
Acked-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent d6f83c1b
......@@ -421,4 +421,6 @@ config PHY_CYGNUS_PCIE
Enable this to support the Broadcom Cygnus PCIe PHY.
If unsure, say N.
source "drivers/phy/tegra/Kconfig"
endmenu
......@@ -52,3 +52,5 @@ obj-$(CONFIG_PHY_TUSB1210) += phy-tusb1210.o
obj-$(CONFIG_PHY_BRCMSTB_SATA) += phy-brcmstb-sata.o
obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
obj-$(CONFIG_PHY_CYGNUS_PCIE) += phy-bcm-cygnus-pcie.o
obj-$(CONFIG_ARCH_TEGRA) += tegra/
config PHY_TEGRA_XUSB
tristate "NVIDIA Tegra XUSB pad controller driver"
depends on ARCH_TEGRA
help
Choose this option if you have an NVIDIA Tegra SoC.
To compile this driver as a module, choose M here: the module will
be called phy-tegra-xusb.
obj-$(CONFIG_PHY_TEGRA_XUSB) += phy-tegra-xusb.o
phy-tegra-xusb-y += xusb.o
phy-tegra-xusb-$(CONFIG_ARCH_TEGRA_124_SOC) += xusb-tegra124.o
phy-tegra-xusb-$(CONFIG_ARCH_TEGRA_132_SOC) += xusb-tegra124.o
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/*
* Copyright (c) 2014-2015, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2015, Google Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#ifndef __PHY_TEGRA_XUSB_H
#define __PHY_TEGRA_XUSB_H
#include <linux/io.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
/* legacy entry points for backwards-compatibility */
int tegra_xusb_padctl_legacy_probe(struct platform_device *pdev);
int tegra_xusb_padctl_legacy_remove(struct platform_device *pdev);
struct phy;
struct phy_provider;
struct platform_device;
struct regulator;
/*
* lanes
*/
struct tegra_xusb_lane_soc {
const char *name;
unsigned int offset;
unsigned int shift;
unsigned int mask;
const char * const *funcs;
unsigned int num_funcs;
};
struct tegra_xusb_lane {
const struct tegra_xusb_lane_soc *soc;
struct tegra_xusb_pad *pad;
struct device_node *np;
struct list_head list;
unsigned int function;
unsigned int index;
};
int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
struct device_node *np);
struct tegra_xusb_usb2_lane {
struct tegra_xusb_lane base;
u32 hs_curr_level_offset;
};
static inline struct tegra_xusb_usb2_lane *
to_usb2_lane(struct tegra_xusb_lane *lane)
{
return container_of(lane, struct tegra_xusb_usb2_lane, base);
}
struct tegra_xusb_ulpi_lane {
struct tegra_xusb_lane base;
};
static inline struct tegra_xusb_ulpi_lane *
to_ulpi_lane(struct tegra_xusb_lane *lane)
{
return container_of(lane, struct tegra_xusb_ulpi_lane, base);
}
struct tegra_xusb_hsic_lane {
struct tegra_xusb_lane base;
u32 strobe_trim;
u32 rx_strobe_trim;
u32 rx_data_trim;
u32 tx_rtune_n;
u32 tx_rtune_p;
u32 tx_rslew_n;
u32 tx_rslew_p;
bool auto_term;
};
static inline struct tegra_xusb_hsic_lane *
to_hsic_lane(struct tegra_xusb_lane *lane)
{
return container_of(lane, struct tegra_xusb_hsic_lane, base);
}
struct tegra_xusb_pcie_lane {
struct tegra_xusb_lane base;
};
static inline struct tegra_xusb_pcie_lane *
to_pcie_lane(struct tegra_xusb_lane *lane)
{
return container_of(lane, struct tegra_xusb_pcie_lane, base);
}
struct tegra_xusb_sata_lane {
struct tegra_xusb_lane base;
};
static inline struct tegra_xusb_sata_lane *
to_sata_lane(struct tegra_xusb_lane *lane)
{
return container_of(lane, struct tegra_xusb_sata_lane, base);
}
struct tegra_xusb_lane_ops {
struct tegra_xusb_lane *(*probe)(struct tegra_xusb_pad *pad,
struct device_node *np,
unsigned int index);
void (*remove)(struct tegra_xusb_lane *lane);
};
/*
* pads
*/
struct tegra_xusb_pad_soc;
struct tegra_xusb_padctl;
struct tegra_xusb_pad_ops {
struct tegra_xusb_pad *(*probe)(struct tegra_xusb_padctl *padctl,
const struct tegra_xusb_pad_soc *soc,
struct device_node *np);
void (*remove)(struct tegra_xusb_pad *pad);
};
struct tegra_xusb_pad_soc {
const char *name;
const struct tegra_xusb_lane_soc *lanes;
unsigned int num_lanes;
const struct tegra_xusb_pad_ops *ops;
};
struct tegra_xusb_pad {
const struct tegra_xusb_pad_soc *soc;
struct tegra_xusb_padctl *padctl;
struct phy_provider *provider;
struct phy **lanes;
struct device dev;
const struct tegra_xusb_lane_ops *ops;
struct list_head list;
};
static inline struct tegra_xusb_pad *to_tegra_xusb_pad(struct device *dev)
{
return container_of(dev, struct tegra_xusb_pad, dev);
}
int tegra_xusb_pad_init(struct tegra_xusb_pad *pad,
struct tegra_xusb_padctl *padctl,
struct device_node *np);
int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
const struct phy_ops *ops);
void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad);
struct tegra_xusb_usb2_pad {
struct tegra_xusb_pad base;
struct clk *clk;
unsigned int enable;
struct mutex lock;
};
static inline struct tegra_xusb_usb2_pad *
to_usb2_pad(struct tegra_xusb_pad *pad)
{
return container_of(pad, struct tegra_xusb_usb2_pad, base);
}
struct tegra_xusb_ulpi_pad {
struct tegra_xusb_pad base;
};
static inline struct tegra_xusb_ulpi_pad *
to_ulpi_pad(struct tegra_xusb_pad *pad)
{
return container_of(pad, struct tegra_xusb_ulpi_pad, base);
}
struct tegra_xusb_hsic_pad {
struct tegra_xusb_pad base;
struct regulator *supply;
struct clk *clk;
};
static inline struct tegra_xusb_hsic_pad *
to_hsic_pad(struct tegra_xusb_pad *pad)
{
return container_of(pad, struct tegra_xusb_hsic_pad, base);
}
struct tegra_xusb_pcie_pad {
struct tegra_xusb_pad base;
struct reset_control *rst;
struct clk *pll;
unsigned int enable;
};
static inline struct tegra_xusb_pcie_pad *
to_pcie_pad(struct tegra_xusb_pad *pad)
{
return container_of(pad, struct tegra_xusb_pcie_pad, base);
}
struct tegra_xusb_sata_pad {
struct tegra_xusb_pad base;
struct reset_control *rst;
struct clk *pll;
unsigned int enable;
};
static inline struct tegra_xusb_sata_pad *
to_sata_pad(struct tegra_xusb_pad *pad)
{
return container_of(pad, struct tegra_xusb_sata_pad, base);
}
/*
* ports
*/
struct tegra_xusb_port_ops;
struct tegra_xusb_port {
struct tegra_xusb_padctl *padctl;
struct tegra_xusb_lane *lane;
unsigned int index;
struct list_head list;
struct device dev;
const struct tegra_xusb_port_ops *ops;
};
struct tegra_xusb_lane_map {
unsigned int port;
const char *type;
unsigned int index;
const char *func;
};
struct tegra_xusb_lane *
tegra_xusb_port_find_lane(struct tegra_xusb_port *port,
const struct tegra_xusb_lane_map *map,
const char *function);
struct tegra_xusb_port *
tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type,
unsigned int index);
struct tegra_xusb_usb2_port {
struct tegra_xusb_port base;
struct regulator *supply;
bool internal;
};
static inline struct tegra_xusb_usb2_port *
to_usb2_port(struct tegra_xusb_port *port)
{
return container_of(port, struct tegra_xusb_usb2_port, base);
}
struct tegra_xusb_usb2_port *
tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl,
unsigned int index);
struct tegra_xusb_ulpi_port {
struct tegra_xusb_port base;
struct regulator *supply;
bool internal;
};
static inline struct tegra_xusb_ulpi_port *
to_ulpi_port(struct tegra_xusb_port *port)
{
return container_of(port, struct tegra_xusb_ulpi_port, base);
}
struct tegra_xusb_hsic_port {
struct tegra_xusb_port base;
};
static inline struct tegra_xusb_hsic_port *
to_hsic_port(struct tegra_xusb_port *port)
{
return container_of(port, struct tegra_xusb_hsic_port, base);
}
struct tegra_xusb_usb3_port {
struct tegra_xusb_port base;
struct regulator *supply;
bool context_saved;
unsigned int port;
bool internal;
u32 tap1;
u32 amp;
u32 ctle_z;
u32 ctle_g;
};
static inline struct tegra_xusb_usb3_port *
to_usb3_port(struct tegra_xusb_port *port)
{
return container_of(port, struct tegra_xusb_usb3_port, base);
}
struct tegra_xusb_usb3_port *
tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl,
unsigned int index);
struct tegra_xusb_port_ops {
int (*enable)(struct tegra_xusb_port *port);
void (*disable)(struct tegra_xusb_port *port);
struct tegra_xusb_lane *(*map)(struct tegra_xusb_port *port);
};
/*
* pad controller
*/
struct tegra_xusb_padctl_soc;
struct tegra_xusb_padctl_ops {
struct tegra_xusb_padctl *
(*probe)(struct device *dev,
const struct tegra_xusb_padctl_soc *soc);
void (*remove)(struct tegra_xusb_padctl *padctl);
int (*usb3_save_context)(struct tegra_xusb_padctl *padctl,
unsigned int index);
int (*hsic_set_idle)(struct tegra_xusb_padctl *padctl,
unsigned int index, bool idle);
int (*usb3_set_lfps_detect)(struct tegra_xusb_padctl *padctl,
unsigned int index, bool enable);
};
struct tegra_xusb_padctl_soc {
const struct tegra_xusb_pad_soc * const *pads;
unsigned int num_pads;
struct {
struct {
const struct tegra_xusb_port_ops *ops;
unsigned int count;
} usb2, ulpi, hsic, usb3;
} ports;
const struct tegra_xusb_padctl_ops *ops;
};
struct tegra_xusb_padctl {
struct device *dev;
void __iomem *regs;
struct mutex lock;
struct reset_control *rst;
const struct tegra_xusb_padctl_soc *soc;
struct tegra_xusb_pad *pcie;
struct tegra_xusb_pad *sata;
struct tegra_xusb_pad *ulpi;
struct tegra_xusb_pad *usb2;
struct tegra_xusb_pad *hsic;
struct list_head ports;
struct list_head lanes;
struct list_head pads;
unsigned int enable;
struct clk *clk;
};
static inline void padctl_writel(struct tegra_xusb_padctl *padctl, u32 value,
unsigned long offset)
{
dev_dbg(padctl->dev, "%08lx < %08x\n", offset, value);
writel(value, padctl->regs + offset);
}
static inline u32 padctl_readl(struct tegra_xusb_padctl *padctl,
unsigned long offset)
{
u32 value = readl(padctl->regs + offset);
dev_dbg(padctl->dev, "%08lx > %08x\n", offset, value);
return value;
}
struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl,
const char *name,
unsigned int index);
#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
extern const struct tegra_xusb_padctl_soc tegra124_xusb_padctl_soc;
#endif
#if defined(CONFIG_ARCH_TEGRA_210_SOC)
extern const struct tegra_xusb_padctl_soc tegra210_xusb_padctl_soc;
#endif
#endif /* __PHY_TEGRA_XUSB_H */
......@@ -873,7 +873,7 @@ static const struct of_device_id tegra_xusb_padctl_of_match[] = {
};
MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match);
static int tegra_xusb_padctl_probe(struct platform_device *pdev)
int tegra_xusb_padctl_legacy_probe(struct platform_device *pdev)
{
struct tegra_xusb_padctl *padctl;
const struct of_device_id *match;
......@@ -955,8 +955,9 @@ reset:
reset_control_assert(padctl->rst);
return err;
}
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_legacy_probe);
static int tegra_xusb_padctl_remove(struct platform_device *pdev)
int tegra_xusb_padctl_legacy_remove(struct platform_device *pdev)
{
struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev);
int err;
......@@ -969,17 +970,4 @@ static int tegra_xusb_padctl_remove(struct platform_device *pdev)
return err;
}
static struct platform_driver tegra_xusb_padctl_driver = {
.driver = {
.name = "tegra-xusb-padctl",
.of_match_table = tegra_xusb_padctl_of_match,
},
.probe = tegra_xusb_padctl_probe,
.remove = tegra_xusb_padctl_remove,
};
module_platform_driver(tegra_xusb_padctl_driver);
MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
MODULE_DESCRIPTION("Tegra 124 XUSB Pad Control driver");
MODULE_LICENSE("GPL v2");
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_legacy_remove);
/*
* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#ifndef PHY_TEGRA_XUSB_H
#define PHY_TEGRA_XUSB_H
struct tegra_xusb_padctl;
struct device;
struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev);
void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl);
int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl,
unsigned int port);
int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
unsigned int port, bool idle);
int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
unsigned int port, bool enable);
#endif /* PHY_TEGRA_XUSB_H */
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