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Message-ID: <CAL1qeaGKUGjSzriDGptR+h23+bS3ZWuStz6koPURCstkFbEjNA@mail.gmail.com>
Date: Wed, 11 Jun 2014 13:23:59 -0700
From: Andrew Bresticker <abrestic@...omium.org>
To: Thierry Reding <thierry.reding@...il.com>
Cc: Linus Walleij <linus.walleij@...aro.org>,
Stephen Warren <swarren@...dotorg.org>,
Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/4] pinctrl: Add NVIDIA Tegra XUSB pad controller support
On Tue, Jun 10, 2014 at 4:11 AM, Thierry Reding
<thierry.reding@...il.com> wrote:
> From: Thierry Reding <treding@...dia.com>
>
> The XUSB pad controller found on NVIDIA Tegra SoCs provides several pads
> that lanes can be assigned to in order to support a variety of interface
> options: USB 2.0, USB 3.0, PCIe and SATA.
>
> In addition to the pin controller used to assign lanes to pads two PHYs
> are exposed to allow the bricks for PCIe and SATA to be powered up and
> down by PCIe and SATA drivers.
>
> Signed-off-by: Thierry Reding <treding@...dia.com>
> ---
> Changes in v2:
> - remove unused tegra124_groups array
> - move header file to binding patch
> - default to y for ARCH_TEGRA
>
> drivers/pinctrl/Kconfig | 6 +
> drivers/pinctrl/Makefile | 1 +
> drivers/pinctrl/pinctrl-tegra-xusb.c | 896 +++++++++++++++++++++++++++++++++++
> 3 files changed, 903 insertions(+)
> create mode 100644 drivers/pinctrl/pinctrl-tegra-xusb.c
>
> diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
> index 0042ccb46b9a..0fa42be8df00 100644
> --- a/drivers/pinctrl/Kconfig
> +++ b/drivers/pinctrl/Kconfig
> @@ -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
> diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
> index c4b5d405b8f5..df8878839b44 100644
> --- a/drivers/pinctrl/Makefile
> +++ b/drivers/pinctrl/Makefile
> @@ -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
> diff --git a/drivers/pinctrl/pinctrl-tegra-xusb.c b/drivers/pinctrl/pinctrl-tegra-xusb.c
> new file mode 100644
> index 000000000000..8f730c7efdbf
> --- /dev/null
> +++ b/drivers/pinctrl/pinctrl-tegra-xusb.c
> @@ -0,0 +1,896 @@
> +/*
> + * 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:
> + value = padctl_readl(padctl, lane->offset);
> + value = (value >> lane->iddq) & 0x1;
> + *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 int i;
> + u32 value;
> +
> + 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:
> + value = padctl_readl(padctl, lane->offset);
This overwrites the configuration value - probably want to use a
separate variable for the register value.
> +
> + if (!value)
> + value &= ~lane->iddq;
> + else
> + value |= lane->iddq;
> +
> + padctl_writel(padctl, value, lane->offset);
> + break;
> +
> + default:
> + dev_err(padctl->dev,
> + "invalid configuration parameter: %04x\n",
> + param);
> + return -ENOTSUPP;
> + }
> + }
> +
> + return 0;
> +}
> +
> +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,
> +};
> +
> +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@...dia.com>");
> +MODULE_DESCRIPTION("Tegra 124 XUSB Pad Control driver");
> +MODULE_LICENSE("GPL v2");
> --
> 1.9.2
>
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