Merge branch 'for-3.17/xusb-padctl' into for-3.17/dt

This commit is contained in:
Thierry Reding 2014-07-17 15:01:57 +02:00
commit 69c018268b
5 changed files with 1114 additions and 0 deletions

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@ -0,0 +1,127 @@
Device tree binding for NVIDIA Tegra XUSB pad controller
========================================================
The Tegra XUSB pad controller manages a set of lanes, each of which can be
assigned to one out of a set of different pads. Some of these pads have an
associated PHY that must be powered up before the pad can be used.
This document defines the device-specific binding for the XUSB pad controller.
Refer to pinctrl-bindings.txt in this directory for generic information about
pin controller device tree bindings and ../phy/phy-bindings.txt for details on
how to describe and reference PHYs in device trees.
Required properties:
--------------------
- compatible: should be "nvidia,tegra124-xusb-padctl"
- reg: Physical base address and length of the controller's registers.
- resets: Must contain an entry for each entry in reset-names.
See ../reset/reset.txt for details.
- reset-names: Must include the following entries:
- padctl
- #phy-cells: Should be 1. The specifier is the index of the PHY to reference.
See <dt-bindings/pinctrl/pinctrl-tegra-xusb.h> for the list of valid values.
Lane muxing:
------------
Child nodes contain the pinmux configurations following the conventions from
the pinctrl-bindings.txt document. Typically a single, static configuration is
given and applied at boot time.
Each subnode describes groups of lanes along with parameters and pads that
they should be assigned to. The name of these subnodes is not important. All
subnodes should be parsed solely based on their content.
Each subnode only applies the parameters that are explicitly listed. In other
words, if a subnode that lists a function but no pin configuration parameters
implies no information about any pin configuration parameters. Similarly, a
subnode that describes only an IDDQ parameter implies no information about
what function the pins are assigned to. For this reason even seemingly boolean
values are actually tristates in this binding: unspecified, off or on.
Unspecified is represented as an absent property, and off/on are represented
as integer values 0 and 1.
Required properties:
- nvidia,lanes: An array of strings. Each string is the name of a lane.
Optional properties:
- nvidia,function: A string that is the name of the function (pad) that the
pin or group should be assigned to. Valid values for function names are
listed below.
- nvidia,iddq: Enables IDDQ mode of the lane. (0: no, 1: yes)
Note that not all of these properties are valid for all lanes. Lanes can be
divided into three groups:
- otg-0, otg-1, otg-2:
Valid functions for this group are: "snps", "xusb", "uart", "rsvd".
The nvidia,iddq property does not apply to this group.
- ulpi-0, hsic-0, hsic-1:
Valid functions for this group are: "snps", "xusb".
The nvidia,iddq property does not apply to this group.
- pcie-0, pcie-1, pcie-2, pcie-3, pcie-4, sata-0:
Valid functions for this group are: "pcie", "usb3", "sata", "rsvd".
Example:
========
SoC file extract:
-----------------
padctl@0,7009f000 {
compatible = "nvidia,tegra124-xusb-padctl";
reg = <0x0 0x7009f000 0x0 0x1000>;
resets = <&tegra_car 142>;
reset-names = "padctl";
#phy-cells = <1>;
};
Board file extract:
-------------------
pcie-controller@0,01003000 {
...
phys = <&padctl 0>;
phy-names = "pcie";
...
};
...
padctl: padctl@0,7009f000 {
pinctrl-0 = <&padctl_default>;
pinctrl-names = "default";
padctl_default: pinmux {
usb3 {
nvidia,lanes = "pcie-0", "pcie-1";
nvidia,function = "usb3";
nvidia,iddq = <0>;
};
pcie {
nvidia,lanes = "pcie-2", "pcie-3",
"pcie-4";
nvidia,function = "pcie";
nvidia,iddq = <0>;
};
sata {
nvidia,lanes = "sata-0";
nvidia,function = "sata";
nvidia,iddq = <0>;
};
};
};

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@ -328,6 +328,12 @@ config PINCTRL_TEGRA124
bool
select PINCTRL_TEGRA
config PINCTRL_TEGRA_XUSB
def_bool y if ARCH_TEGRA
select GENERIC_PHY
select PINCONF
select PINMUX
config PINCTRL_TZ1090
bool "Toumaz Xenif TZ1090 pin control driver"
depends on SOC_TZ1090

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@ -55,6 +55,7 @@ obj-$(CONFIG_PINCTRL_TEGRA20) += pinctrl-tegra20.o
obj-$(CONFIG_PINCTRL_TEGRA30) += pinctrl-tegra30.o
obj-$(CONFIG_PINCTRL_TEGRA114) += pinctrl-tegra114.o
obj-$(CONFIG_PINCTRL_TEGRA124) += pinctrl-tegra124.o
obj-$(CONFIG_PINCTRL_TEGRA_XUSB) += pinctrl-tegra-xusb.o
obj-$(CONFIG_PINCTRL_TZ1090) += pinctrl-tz1090.o
obj-$(CONFIG_PINCTRL_TZ1090_PDC) += pinctrl-tz1090-pdc.o
obj-$(CONFIG_PINCTRL_U300) += pinctrl-u300.o

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@ -0,0 +1,973 @@
/*
* Copyright (c) 2014, 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.
*/
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/phy/phy.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <dt-bindings/pinctrl/pinctrl-tegra-xusb.h>
#include "core.h"
#include "pinctrl-utils.h"
#define XUSB_PADCTL_ELPG_PROGRAM 0x01c
#define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN (1 << 26)
#define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY (1 << 25)
#define XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN (1 << 24)
#define XUSB_PADCTL_IOPHY_PLL_P0_CTL1 0x040
#define XUSB_PADCTL_IOPHY_PLL_P0_CTL1_PLL0_LOCKDET (1 << 19)
#define XUSB_PADCTL_IOPHY_PLL_P0_CTL1_REFCLK_SEL_MASK (0xf << 12)
#define XUSB_PADCTL_IOPHY_PLL_P0_CTL1_PLL_RST (1 << 1)
#define XUSB_PADCTL_IOPHY_PLL_P0_CTL2 0x044
#define XUSB_PADCTL_IOPHY_PLL_P0_CTL2_REFCLKBUF_EN (1 << 6)
#define XUSB_PADCTL_IOPHY_PLL_P0_CTL2_TXCLKREF_EN (1 << 5)
#define XUSB_PADCTL_IOPHY_PLL_P0_CTL2_TXCLKREF_SEL (1 << 4)
#define XUSB_PADCTL_IOPHY_PLL_S0_CTL1 0x138
#define XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL1_LOCKDET (1 << 27)
#define XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL1_MODE (1 << 24)
#define XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_PWR_OVRD (1 << 3)
#define XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_RST (1 << 1)
#define XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_IDDQ (1 << 0)
#define XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1 0x148
#define XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ_OVRD (1 << 1)
#define XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ (1 << 0)
struct tegra_xusb_padctl_function {
const char *name;
const char * const *groups;
unsigned int num_groups;
};
struct tegra_xusb_padctl_group {
const unsigned int *funcs;
unsigned int num_funcs;
};
struct tegra_xusb_padctl_soc {
const struct pinctrl_pin_desc *pins;
unsigned int num_pins;
const struct tegra_xusb_padctl_function *functions;
unsigned int num_functions;
const struct tegra_xusb_padctl_lane *lanes;
unsigned int num_lanes;
};
struct tegra_xusb_padctl_lane {
const char *name;
unsigned int offset;
unsigned int shift;
unsigned int mask;
unsigned int iddq;
const unsigned int *funcs;
unsigned int num_funcs;
};
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 pinctrl_dev *pinctrl;
struct pinctrl_desc desc;
struct phy_provider *provider;
struct phy *phys[2];
unsigned int enable;
};
static inline void padctl_writel(struct tegra_xusb_padctl *padctl, u32 value,
unsigned long offset)
{
writel(value, padctl->regs + offset);
}
static inline u32 padctl_readl(struct tegra_xusb_padctl *padctl,
unsigned long offset)
{
return readl(padctl->regs + offset);
}
static int tegra_xusb_padctl_get_groups_count(struct pinctrl_dev *pinctrl)
{
struct tegra_xusb_padctl *padctl = pinctrl_dev_get_drvdata(pinctrl);
return padctl->soc->num_pins;
}
static const char *tegra_xusb_padctl_get_group_name(struct pinctrl_dev *pinctrl,
unsigned int group)
{
struct tegra_xusb_padctl *padctl = pinctrl_dev_get_drvdata(pinctrl);
return padctl->soc->pins[group].name;
}
enum tegra_xusb_padctl_param {
TEGRA_XUSB_PADCTL_IDDQ,
};
static const struct tegra_xusb_padctl_property {
const char *name;
enum tegra_xusb_padctl_param param;
} properties[] = {
{ "nvidia,iddq", TEGRA_XUSB_PADCTL_IDDQ },
};
#define TEGRA_XUSB_PADCTL_PACK(param, value) ((param) << 16 | (value))
#define TEGRA_XUSB_PADCTL_UNPACK_PARAM(config) ((config) >> 16)
#define TEGRA_XUSB_PADCTL_UNPACK_VALUE(config) ((config) & 0xffff)
static int tegra_xusb_padctl_parse_subnode(struct tegra_xusb_padctl *padctl,
struct device_node *np,
struct pinctrl_map **maps,
unsigned int *reserved_maps,
unsigned int *num_maps)
{
unsigned int i, reserve = 0, num_configs = 0;
unsigned long config, *configs = NULL;
const char *function, *group;
struct property *prop;
int err = 0;
u32 value;
err = of_property_read_string(np, "nvidia,function", &function);
if (err < 0) {
if (err != -EINVAL)
return err;
function = NULL;
}
for (i = 0; i < ARRAY_SIZE(properties); i++) {
err = of_property_read_u32(np, properties[i].name, &value);
if (err < 0) {
if (err == -EINVAL)
continue;
return err;
}
config = TEGRA_XUSB_PADCTL_PACK(properties[i].param, value);
err = pinctrl_utils_add_config(padctl->pinctrl, &configs,
&num_configs, config);
if (err < 0)
return err;
}
if (function)
reserve++;
if (num_configs)
reserve++;
err = of_property_count_strings(np, "nvidia,lanes");
if (err < 0)
return err;
reserve *= err;
err = pinctrl_utils_reserve_map(padctl->pinctrl, maps, reserved_maps,
num_maps, reserve);
if (err < 0)
return err;
of_property_for_each_string(np, "nvidia,lanes", prop, group) {
if (function) {
err = pinctrl_utils_add_map_mux(padctl->pinctrl, maps,
reserved_maps, num_maps, group,
function);
if (err < 0)
return err;
}
if (num_configs) {
err = pinctrl_utils_add_map_configs(padctl->pinctrl,
maps, reserved_maps, num_maps, group,
configs, num_configs,
PIN_MAP_TYPE_CONFIGS_GROUP);
if (err < 0)
return err;
}
}
return 0;
}
static int tegra_xusb_padctl_dt_node_to_map(struct pinctrl_dev *pinctrl,
struct device_node *parent,
struct pinctrl_map **maps,
unsigned int *num_maps)
{
struct tegra_xusb_padctl *padctl = pinctrl_dev_get_drvdata(pinctrl);
unsigned int reserved_maps = 0;
struct device_node *np;
int err;
*num_maps = 0;
*maps = NULL;
for_each_child_of_node(parent, np) {
err = tegra_xusb_padctl_parse_subnode(padctl, np, maps,
&reserved_maps,
num_maps);
if (err < 0)
return err;
}
return 0;
}
static const struct pinctrl_ops tegra_xusb_padctl_pinctrl_ops = {
.get_groups_count = tegra_xusb_padctl_get_groups_count,
.get_group_name = tegra_xusb_padctl_get_group_name,
.dt_node_to_map = tegra_xusb_padctl_dt_node_to_map,
.dt_free_map = pinctrl_utils_dt_free_map,
};
static int tegra_xusb_padctl_get_functions_count(struct pinctrl_dev *pinctrl)
{
struct tegra_xusb_padctl *padctl = pinctrl_dev_get_drvdata(pinctrl);
return padctl->soc->num_functions;
}
static const char *
tegra_xusb_padctl_get_function_name(struct pinctrl_dev *pinctrl,
unsigned int function)
{
struct tegra_xusb_padctl *padctl = pinctrl_dev_get_drvdata(pinctrl);
return padctl->soc->functions[function].name;
}
static int tegra_xusb_padctl_get_function_groups(struct pinctrl_dev *pinctrl,
unsigned int function,
const char * const **groups,
unsigned * const num_groups)
{
struct tegra_xusb_padctl *padctl = pinctrl_dev_get_drvdata(pinctrl);
*num_groups = padctl->soc->functions[function].num_groups;
*groups = padctl->soc->functions[function].groups;
return 0;
}
static int tegra_xusb_padctl_pinmux_enable(struct pinctrl_dev *pinctrl,
unsigned int function,
unsigned int group)
{
struct tegra_xusb_padctl *padctl = pinctrl_dev_get_drvdata(pinctrl);
const struct tegra_xusb_padctl_lane *lane;
unsigned int i;
u32 value;
lane = &padctl->soc->lanes[group];
for (i = 0; i < lane->num_funcs; i++)
if (lane->funcs[i] == function)
break;
if (i >= lane->num_funcs)
return -EINVAL;
value = padctl_readl(padctl, lane->offset);
value &= ~(lane->mask << lane->shift);
value |= i << lane->shift;
padctl_writel(padctl, value, lane->offset);
return 0;
}
static const struct pinmux_ops tegra_xusb_padctl_pinmux_ops = {
.get_functions_count = tegra_xusb_padctl_get_functions_count,
.get_function_name = tegra_xusb_padctl_get_function_name,
.get_function_groups = tegra_xusb_padctl_get_function_groups,
.enable = tegra_xusb_padctl_pinmux_enable,
};
static int tegra_xusb_padctl_pinconf_group_get(struct pinctrl_dev *pinctrl,
unsigned int group,
unsigned long *config)
{
struct tegra_xusb_padctl *padctl = pinctrl_dev_get_drvdata(pinctrl);
const struct tegra_xusb_padctl_lane *lane;
enum tegra_xusb_padctl_param param;
u32 value;
param = TEGRA_XUSB_PADCTL_UNPACK_PARAM(*config);
lane = &padctl->soc->lanes[group];
switch (param) {
case TEGRA_XUSB_PADCTL_IDDQ:
/* lanes with iddq == 0 don't support this parameter */
if (lane->iddq == 0)
return -EINVAL;
value = padctl_readl(padctl, lane->offset);
if (value & BIT(lane->iddq))
value = 0;
else
value = 1;
*config = TEGRA_XUSB_PADCTL_PACK(param, value);
break;
default:
dev_err(padctl->dev, "invalid configuration parameter: %04x\n",
param);
return -ENOTSUPP;
}
return 0;
}
static int tegra_xusb_padctl_pinconf_group_set(struct pinctrl_dev *pinctrl,
unsigned int group,
unsigned long *configs,
unsigned int num_configs)
{
struct tegra_xusb_padctl *padctl = pinctrl_dev_get_drvdata(pinctrl);
const struct tegra_xusb_padctl_lane *lane;
enum tegra_xusb_padctl_param param;
unsigned long value;
unsigned int i;
u32 regval;
lane = &padctl->soc->lanes[group];
for (i = 0; i < num_configs; i++) {
param = TEGRA_XUSB_PADCTL_UNPACK_PARAM(configs[i]);
value = TEGRA_XUSB_PADCTL_UNPACK_VALUE(configs[i]);
switch (param) {
case TEGRA_XUSB_PADCTL_IDDQ:
/* lanes with iddq == 0 don't support this parameter */
if (lane->iddq == 0)
return -EINVAL;
regval = padctl_readl(padctl, lane->offset);
if (value)
regval &= ~BIT(lane->iddq);
else
regval |= BIT(lane->iddq);
padctl_writel(padctl, regval, lane->offset);
break;
default:
dev_err(padctl->dev,
"invalid configuration parameter: %04x\n",
param);
return -ENOTSUPP;
}
}
return 0;
}
#ifdef CONFIG_DEBUG_FS
static const char *strip_prefix(const char *s)
{
const char *comma = strchr(s, ',');
if (!comma)
return s;
return comma + 1;
}
static void
tegra_xusb_padctl_pinconf_group_dbg_show(struct pinctrl_dev *pinctrl,
struct seq_file *s,
unsigned int group)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(properties); i++) {
unsigned long config, value;
int err;
config = TEGRA_XUSB_PADCTL_PACK(properties[i].param, 0);
err = tegra_xusb_padctl_pinconf_group_get(pinctrl, group,
&config);
if (err < 0)
continue;
value = TEGRA_XUSB_PADCTL_UNPACK_VALUE(config);
seq_printf(s, "\n\t%s=%lu\n", strip_prefix(properties[i].name),
value);
}
}
static void
tegra_xusb_padctl_pinconf_config_dbg_show(struct pinctrl_dev *pinctrl,
struct seq_file *s,
unsigned long config)
{
enum tegra_xusb_padctl_param param;
const char *name = "unknown";
unsigned long value;
unsigned int i;
param = TEGRA_XUSB_PADCTL_UNPACK_PARAM(config);
value = TEGRA_XUSB_PADCTL_UNPACK_VALUE(config);
for (i = 0; i < ARRAY_SIZE(properties); i++) {
if (properties[i].param == param) {
name = properties[i].name;
break;
}
}
seq_printf(s, "%s=%lu", strip_prefix(name), value);
}
#endif
static const struct pinconf_ops tegra_xusb_padctl_pinconf_ops = {
.pin_config_group_get = tegra_xusb_padctl_pinconf_group_get,
.pin_config_group_set = tegra_xusb_padctl_pinconf_group_set,
#ifdef CONFIG_DEBUG_FS
.pin_config_group_dbg_show = tegra_xusb_padctl_pinconf_group_dbg_show,
.pin_config_config_dbg_show = tegra_xusb_padctl_pinconf_config_dbg_show,
#endif
};
static int tegra_xusb_padctl_enable(struct tegra_xusb_padctl *padctl)
{
u32 value;
mutex_lock(&padctl->lock);
if (padctl->enable++ > 0)
goto out;
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN;
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
usleep_range(100, 200);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY;
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
usleep_range(100, 200);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value &= ~XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN;
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
out:
mutex_unlock(&padctl->lock);
return 0;
}
static int tegra_xusb_padctl_disable(struct tegra_xusb_padctl *padctl)
{
u32 value;
mutex_lock(&padctl->lock);
if (WARN_ON(padctl->enable == 0))
goto out;
if (--padctl->enable > 0)
goto out;
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_VCORE_DOWN;
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
usleep_range(100, 200);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN_EARLY;
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
usleep_range(100, 200);
value = padctl_readl(padctl, XUSB_PADCTL_ELPG_PROGRAM);
value |= XUSB_PADCTL_ELPG_PROGRAM_AUX_MUX_LP0_CLAMP_EN;
padctl_writel(padctl, value, XUSB_PADCTL_ELPG_PROGRAM);
out:
mutex_unlock(&padctl->lock);
return 0;
}
static int tegra_xusb_phy_init(struct phy *phy)
{
struct tegra_xusb_padctl *padctl = phy_get_drvdata(phy);
return tegra_xusb_padctl_enable(padctl);
}
static int tegra_xusb_phy_exit(struct phy *phy)
{
struct tegra_xusb_padctl *padctl = phy_get_drvdata(phy);
return tegra_xusb_padctl_disable(padctl);
}
static int pcie_phy_power_on(struct phy *phy)
{
struct tegra_xusb_padctl *padctl = phy_get_drvdata(phy);
unsigned long timeout;
int err = -ETIMEDOUT;
u32 value;
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
value &= ~XUSB_PADCTL_IOPHY_PLL_P0_CTL1_REFCLK_SEL_MASK;
padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_P0_CTL2);
value |= XUSB_PADCTL_IOPHY_PLL_P0_CTL2_REFCLKBUF_EN |
XUSB_PADCTL_IOPHY_PLL_P0_CTL2_TXCLKREF_EN |
XUSB_PADCTL_IOPHY_PLL_P0_CTL2_TXCLKREF_SEL;
padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_P0_CTL2);
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
value |= XUSB_PADCTL_IOPHY_PLL_P0_CTL1_PLL_RST;
padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
timeout = jiffies + msecs_to_jiffies(50);
while (time_before(jiffies, timeout)) {
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
if (value & XUSB_PADCTL_IOPHY_PLL_P0_CTL1_PLL0_LOCKDET) {
err = 0;
break;
}
usleep_range(100, 200);
}
return err;
}
static int pcie_phy_power_off(struct phy *phy)
{
struct tegra_xusb_padctl *padctl = phy_get_drvdata(phy);
u32 value;
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
value &= ~XUSB_PADCTL_IOPHY_PLL_P0_CTL1_PLL_RST;
padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_P0_CTL1);
return 0;
}
static const struct phy_ops pcie_phy_ops = {
.init = tegra_xusb_phy_init,
.exit = tegra_xusb_phy_exit,
.power_on = pcie_phy_power_on,
.power_off = pcie_phy_power_off,
.owner = THIS_MODULE,
};
static int sata_phy_power_on(struct phy *phy)
{
struct tegra_xusb_padctl *padctl = phy_get_drvdata(phy);
unsigned long timeout;
int err = -ETIMEDOUT;
u32 value;
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1);
value &= ~XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ_OVRD;
value &= ~XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ;
padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1);
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
value &= ~XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_PWR_OVRD;
value &= ~XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_IDDQ;
padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
value |= XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL1_MODE;
padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
value |= XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_RST;
padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
timeout = jiffies + msecs_to_jiffies(50);
while (time_before(jiffies, timeout)) {
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
if (value & XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL1_LOCKDET) {
err = 0;
break;
}
usleep_range(100, 200);
}
return err;
}
static int sata_phy_power_off(struct phy *phy)
{
struct tegra_xusb_padctl *padctl = phy_get_drvdata(phy);
u32 value;
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
value &= ~XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_RST;
padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
value &= ~XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL1_MODE;
padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
value |= XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_PWR_OVRD;
value |= XUSB_PADCTL_IOPHY_PLL_S0_CTL1_PLL_IDDQ;
padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_PLL_S0_CTL1);
value = padctl_readl(padctl, XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1);
value |= ~XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ_OVRD;
value |= ~XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1_IDDQ;
padctl_writel(padctl, value, XUSB_PADCTL_IOPHY_MISC_PAD_S0_CTL1);
return 0;
}
static const struct phy_ops sata_phy_ops = {
.init = tegra_xusb_phy_init,
.exit = tegra_xusb_phy_exit,
.power_on = sata_phy_power_on,
.power_off = sata_phy_power_off,
.owner = THIS_MODULE,
};
static struct phy *tegra_xusb_padctl_xlate(struct device *dev,
struct of_phandle_args *args)
{
struct tegra_xusb_padctl *padctl = dev_get_drvdata(dev);
unsigned int index = args->args[0];
if (args->args_count <= 0)
return ERR_PTR(-EINVAL);
if (index > ARRAY_SIZE(padctl->phys))
return ERR_PTR(-EINVAL);
return padctl->phys[index];
}
#define PIN_OTG_0 0
#define PIN_OTG_1 1
#define PIN_OTG_2 2
#define PIN_ULPI_0 3
#define PIN_HSIC_0 4
#define PIN_HSIC_1 5
#define PIN_PCIE_0 6
#define PIN_PCIE_1 7
#define PIN_PCIE_2 8
#define PIN_PCIE_3 9
#define PIN_PCIE_4 10
#define PIN_SATA_0 11
static const struct pinctrl_pin_desc tegra124_pins[] = {
PINCTRL_PIN(PIN_OTG_0, "otg-0"),
PINCTRL_PIN(PIN_OTG_1, "otg-1"),
PINCTRL_PIN(PIN_OTG_2, "otg-2"),
PINCTRL_PIN(PIN_ULPI_0, "ulpi-0"),
PINCTRL_PIN(PIN_HSIC_0, "hsic-0"),
PINCTRL_PIN(PIN_HSIC_1, "hsic-1"),
PINCTRL_PIN(PIN_PCIE_0, "pcie-0"),
PINCTRL_PIN(PIN_PCIE_1, "pcie-1"),
PINCTRL_PIN(PIN_PCIE_2, "pcie-2"),
PINCTRL_PIN(PIN_PCIE_3, "pcie-3"),
PINCTRL_PIN(PIN_PCIE_4, "pcie-4"),
PINCTRL_PIN(PIN_SATA_0, "sata-0"),
};
static const char * const tegra124_snps_groups[] = {
"otg-0",
"otg-1",
"otg-2",
"ulpi-0",
"hsic-0",
"hsic-1",
};
static const char * const tegra124_xusb_groups[] = {
"otg-0",
"otg-1",
"otg-2",
"ulpi-0",
"hsic-0",
"hsic-1",
};
static const char * const tegra124_uart_groups[] = {
"otg-0",
"otg-1",
"otg-2",
};
static const char * const tegra124_pcie_groups[] = {
"pcie-0",
"pcie-1",
"pcie-2",
"pcie-3",
"pcie-4",
"sata-0",
};
static const char * const tegra124_usb3_groups[] = {
"pcie-0",
"pcie-1",
"pcie-2",
"pcie-3",
"pcie-4",
"sata-0",
};
static const char * const tegra124_sata_groups[] = {
"pcie-0",
"pcie-1",
"pcie-2",
"pcie-3",
"pcie-4",
"sata-0",
};
static const char * const tegra124_rsvd_groups[] = {
"otg-0",
"otg-1",
"otg-2",
"pcie-0",
"pcie-1",
"pcie-2",
"pcie-3",
"pcie-4",
"sata-0",
};
#define TEGRA124_FUNCTION(_name) \
{ \
.name = #_name, \
.num_groups = ARRAY_SIZE(tegra124_##_name##_groups), \
.groups = tegra124_##_name##_groups, \
}
static struct tegra_xusb_padctl_function tegra124_functions[] = {
TEGRA124_FUNCTION(snps),
TEGRA124_FUNCTION(xusb),
TEGRA124_FUNCTION(uart),
TEGRA124_FUNCTION(pcie),
TEGRA124_FUNCTION(usb3),
TEGRA124_FUNCTION(sata),
TEGRA124_FUNCTION(rsvd),
};
enum tegra124_function {
TEGRA124_FUNC_SNPS,
TEGRA124_FUNC_XUSB,
TEGRA124_FUNC_UART,
TEGRA124_FUNC_PCIE,
TEGRA124_FUNC_USB3,
TEGRA124_FUNC_SATA,
TEGRA124_FUNC_RSVD,
};
static const unsigned int tegra124_otg_functions[] = {
TEGRA124_FUNC_SNPS,
TEGRA124_FUNC_XUSB,
TEGRA124_FUNC_UART,
TEGRA124_FUNC_RSVD,
};
static const unsigned int tegra124_usb_functions[] = {
TEGRA124_FUNC_SNPS,
TEGRA124_FUNC_XUSB,
};
static const unsigned int tegra124_pci_functions[] = {
TEGRA124_FUNC_PCIE,
TEGRA124_FUNC_USB3,
TEGRA124_FUNC_SATA,
TEGRA124_FUNC_RSVD,
};
#define TEGRA124_LANE(_name, _offset, _shift, _mask, _iddq, _funcs) \
{ \
.name = _name, \
.offset = _offset, \
.shift = _shift, \
.mask = _mask, \
.iddq = _iddq, \
.num_funcs = ARRAY_SIZE(tegra124_##_funcs##_functions), \
.funcs = tegra124_##_funcs##_functions, \
}
static const struct tegra_xusb_padctl_lane tegra124_lanes[] = {
TEGRA124_LANE("otg-0", 0x004, 0, 0x3, 0, otg),
TEGRA124_LANE("otg-1", 0x004, 2, 0x3, 0, otg),
TEGRA124_LANE("otg-2", 0x004, 4, 0x3, 0, otg),
TEGRA124_LANE("ulpi-0", 0x004, 12, 0x1, 0, usb),
TEGRA124_LANE("hsic-0", 0x004, 14, 0x1, 0, usb),
TEGRA124_LANE("hsic-1", 0x004, 15, 0x1, 0, usb),
TEGRA124_LANE("pcie-0", 0x134, 16, 0x3, 1, pci),
TEGRA124_LANE("pcie-1", 0x134, 18, 0x3, 2, pci),
TEGRA124_LANE("pcie-2", 0x134, 20, 0x3, 3, pci),
TEGRA124_LANE("pcie-3", 0x134, 22, 0x3, 4, pci),
TEGRA124_LANE("pcie-4", 0x134, 24, 0x3, 5, pci),
TEGRA124_LANE("sata-0", 0x134, 26, 0x3, 6, pci),
};
static const struct tegra_xusb_padctl_soc tegra124_soc = {
.num_pins = ARRAY_SIZE(tegra124_pins),
.pins = tegra124_pins,
.num_functions = ARRAY_SIZE(tegra124_functions),
.functions = tegra124_functions,
.num_lanes = ARRAY_SIZE(tegra124_lanes),
.lanes = tegra124_lanes,
};
static const struct of_device_id tegra_xusb_padctl_of_match[] = {
{ .compatible = "nvidia,tegra124-xusb-padctl", .data = &tegra124_soc },
{ }
};
MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match);
static int tegra_xusb_padctl_probe(struct platform_device *pdev)
{
struct tegra_xusb_padctl *padctl;
const struct of_device_id *match;
struct resource *res;
struct phy *phy;
int err;
padctl = devm_kzalloc(&pdev->dev, sizeof(*padctl), GFP_KERNEL);
if (!padctl)
return -ENOMEM;
platform_set_drvdata(pdev, padctl);
mutex_init(&padctl->lock);
padctl->dev = &pdev->dev;
match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node);
padctl->soc = match->data;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
padctl->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(padctl->regs))
return PTR_ERR(padctl->regs);
padctl->rst = devm_reset_control_get(&pdev->dev, NULL);
if (IS_ERR(padctl->rst))
return PTR_ERR(padctl->rst);
err = reset_control_deassert(padctl->rst);
if (err < 0)
return err;
memset(&padctl->desc, 0, sizeof(padctl->desc));
padctl->desc.name = dev_name(padctl->dev);
padctl->desc.pctlops = &tegra_xusb_padctl_pinctrl_ops;
padctl->desc.pmxops = &tegra_xusb_padctl_pinmux_ops;
padctl->desc.confops = &tegra_xusb_padctl_pinconf_ops;
padctl->desc.owner = THIS_MODULE;
padctl->pinctrl = pinctrl_register(&padctl->desc, &pdev->dev, padctl);
if (!padctl->pinctrl) {
dev_err(&pdev->dev, "failed to register pincontrol\n");
err = -ENODEV;
goto reset;
}
phy = devm_phy_create(&pdev->dev, &pcie_phy_ops, NULL);
if (IS_ERR(phy)) {
err = PTR_ERR(phy);
goto unregister;
}
padctl->phys[TEGRA_XUSB_PADCTL_PCIE] = phy;
phy_set_drvdata(phy, padctl);
phy = devm_phy_create(&pdev->dev, &sata_phy_ops, NULL);
if (IS_ERR(phy)) {
err = PTR_ERR(phy);
goto unregister;
}
padctl->phys[TEGRA_XUSB_PADCTL_SATA] = phy;
phy_set_drvdata(phy, padctl);
padctl->provider = devm_of_phy_provider_register(&pdev->dev,
tegra_xusb_padctl_xlate);
if (err < 0) {
dev_err(&pdev->dev, "failed to register PHYs: %d\n", err);
goto unregister;
}
return 0;
unregister:
pinctrl_unregister(padctl->pinctrl);
reset:
reset_control_assert(padctl->rst);
return err;
}
static int tegra_xusb_padctl_remove(struct platform_device *pdev)
{
struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev);
int err;
pinctrl_unregister(padctl->pinctrl);
err = reset_control_assert(padctl->rst);
if (err < 0)
dev_err(&pdev->dev, "failed to assert reset: %d\n", err);
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");

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@ -0,0 +1,7 @@
#ifndef _DT_BINDINGS_PINCTRL_TEGRA_XUSB_H
#define _DT_BINDINGS_PINCTRL_TEGRA_XUSB_H 1
#define TEGRA_XUSB_PADCTL_PCIE 0
#define TEGRA_XUSB_PADCTL_SATA 1
#endif /* _DT_BINDINGS_PINCTRL_TEGRA_XUSB_H */