- 根目录:
- drivers
- pinctrl
- pinctrl-tegra-xusb.c
/*
* 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 <linux/slab.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_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;
}
static int tegra_xusb_padctl_get_group_pins(struct pinctrl_dev *pinctrl,
unsigned group,
const unsigned **pins,
unsigned *num_pins)
{
/*
* For the tegra-xusb pad controller groups are synonomous
* with lanes/pins and there is always one lane/pin per group.
*/
*pins = &pinctrl->desc->pins[group].number;
*num_pins = 1;
return 0;
}
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;
goto out;
}
config = TEGRA_XUSB_PADCTL_PACK(properties[i].param, value);
err = pinctrl_utils_add_config(padctl->pinctrl, &configs,
&num_configs, config);
if (err < 0)
goto out;
}
if (function)
reserve++;
if (num_configs)
reserve++;
err = of_property_count_strings(np, "nvidia,lanes");
if (err < 0)
goto out;
reserve *= err;
err = pinctrl_utils_reserve_map(padctl->pinctrl, maps, reserved_maps,
num_maps, reserve);
if (err < 0)
goto out;
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)
goto out;
}
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)
goto out;
}
}
err = 0;
out:
kfree(configs);
return err;
}
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,
.get_group_pins = tegra_xusb_padctl_get_group_pins,
.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_set(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,
.set_mux = tegra_xusb_padctl_pinmux_set,
};
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",
};
static const char * const tegra124_usb3_groups[] = {
"pcie-0",
"pcie-1",
"sata-0",
};
static const char * const tegra124_sata_groups[] = {
"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.pins = tegra124_pins;
padctl->desc.npins = ARRAY_SIZE(tegra124_pins);
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 (IS_ERR(padctl->pinctrl)) {
dev_err(&pdev->dev, "failed to register pincontrol\n");
err = PTR_ERR(padctl->pinctrl);
goto reset;
}
phy = devm_phy_create(&pdev->dev, NULL, &pcie_phy_ops);
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, NULL, &sata_phy_ops);
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 (IS_ERR(padctl->provider)) {
err = PTR_ERR(padctl->provider);
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");