Merge tag 'tegra-for-3.17-xusb-padctl' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into next/dt
Merge "ARM: tegra: Add XUSB pad controller support" from Thierry Reding:
Adds device tree bindings and a driver for the XUSB pad controller found
on Tegra114 and later. This is a prerequisites for PCIe, SATA and XUSB
drivers which are all currently being reviewed or pending for merge.
This is a separate branch in case it needs to be pulled into the pinctrl
tree to resolve conflicts.
* tag 'tegra-for-3.17-xusb-padctl' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
pinctrl: Add NVIDIA Tegra XUSB pad controller support
of: Add NVIDIA Tegra XUSB pad controller binding
Signed-off-by: Olof Johansson <olof@lixom.net>
diff --git a/Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-xusb-padctl.txt b/Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-xusb-padctl.txt
new file mode 100644
index 0000000..2f9c0bd
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/nvidia,tegra124-xusb-padctl.txt
@@ -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>;
+ };
+ };
+ };
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 0042ccb..0fa42be 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -328,6 +328,12 @@
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 c4b5d40..df88788 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -55,6 +55,7 @@
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 0000000..4a7daf5
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-tegra-xusb.c
@@ -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");
diff --git a/include/dt-bindings/pinctrl/pinctrl-tegra-xusb.h b/include/dt-bindings/pinctrl/pinctrl-tegra-xusb.h
new file mode 100644
index 0000000..914d56d
--- /dev/null
+++ b/include/dt-bindings/pinctrl/pinctrl-tegra-xusb.h
@@ -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 */