1062 lines
23 KiB
C
1062 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2014-2016, NVIDIA CORPORATION. All rights reserved.
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*/
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/mailbox_client.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/phy/phy.h>
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#include <linux/phy/tegra/xusb.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/consumer.h>
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#include <linux/reset.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <soc/tegra/fuse.h>
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#include "xusb.h"
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static struct phy *tegra_xusb_pad_of_xlate(struct device *dev,
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struct of_phandle_args *args)
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{
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struct tegra_xusb_pad *pad = dev_get_drvdata(dev);
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struct phy *phy = NULL;
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unsigned int i;
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if (args->args_count != 0)
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return ERR_PTR(-EINVAL);
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for (i = 0; i < pad->soc->num_lanes; i++) {
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if (!pad->lanes[i])
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continue;
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if (pad->lanes[i]->dev.of_node == args->np) {
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phy = pad->lanes[i];
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break;
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}
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}
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if (phy == NULL)
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phy = ERR_PTR(-ENODEV);
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return phy;
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}
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static const struct of_device_id tegra_xusb_padctl_of_match[] = {
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#if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC)
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{
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.compatible = "nvidia,tegra124-xusb-padctl",
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.data = &tegra124_xusb_padctl_soc,
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},
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#endif
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#if defined(CONFIG_ARCH_TEGRA_210_SOC)
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{
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.compatible = "nvidia,tegra210-xusb-padctl",
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.data = &tegra210_xusb_padctl_soc,
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},
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#endif
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#if defined(CONFIG_ARCH_TEGRA_186_SOC)
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{
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.compatible = "nvidia,tegra186-xusb-padctl",
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.data = &tegra186_xusb_padctl_soc,
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},
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#endif
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{ }
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};
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MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match);
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static struct device_node *
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tegra_xusb_find_pad_node(struct tegra_xusb_padctl *padctl, const char *name)
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{
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struct device_node *pads, *np;
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pads = of_get_child_by_name(padctl->dev->of_node, "pads");
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if (!pads)
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return NULL;
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np = of_get_child_by_name(pads, name);
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of_node_put(pads);
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return np;
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}
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static struct device_node *
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tegra_xusb_pad_find_phy_node(struct tegra_xusb_pad *pad, unsigned int index)
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{
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struct device_node *np, *lanes;
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lanes = of_get_child_by_name(pad->dev.of_node, "lanes");
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if (!lanes)
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return NULL;
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np = of_get_child_by_name(lanes, pad->soc->lanes[index].name);
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of_node_put(lanes);
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return np;
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}
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int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
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struct device_node *np)
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{
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struct device *dev = &lane->pad->dev;
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const char *function;
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int err;
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err = of_property_read_string(np, "nvidia,function", &function);
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if (err < 0)
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return err;
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err = match_string(lane->soc->funcs, lane->soc->num_funcs, function);
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if (err < 0) {
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dev_err(dev, "invalid function \"%s\" for lane \"%pOFn\"\n",
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function, np);
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return err;
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}
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lane->function = err;
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return 0;
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}
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static void tegra_xusb_lane_destroy(struct phy *phy)
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{
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if (phy) {
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struct tegra_xusb_lane *lane = phy_get_drvdata(phy);
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lane->pad->ops->remove(lane);
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phy_destroy(phy);
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}
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}
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static void tegra_xusb_pad_release(struct device *dev)
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{
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struct tegra_xusb_pad *pad = to_tegra_xusb_pad(dev);
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pad->soc->ops->remove(pad);
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}
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static struct device_type tegra_xusb_pad_type = {
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.release = tegra_xusb_pad_release,
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};
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int tegra_xusb_pad_init(struct tegra_xusb_pad *pad,
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struct tegra_xusb_padctl *padctl,
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struct device_node *np)
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{
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int err;
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device_initialize(&pad->dev);
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INIT_LIST_HEAD(&pad->list);
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pad->dev.parent = padctl->dev;
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pad->dev.type = &tegra_xusb_pad_type;
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pad->dev.of_node = np;
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pad->padctl = padctl;
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err = dev_set_name(&pad->dev, "%s", pad->soc->name);
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if (err < 0)
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goto unregister;
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err = device_add(&pad->dev);
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if (err < 0)
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goto unregister;
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return 0;
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unregister:
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device_unregister(&pad->dev);
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return err;
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}
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int tegra_xusb_pad_register(struct tegra_xusb_pad *pad,
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const struct phy_ops *ops)
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{
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struct device_node *children;
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struct phy *lane;
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unsigned int i;
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int err;
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children = of_get_child_by_name(pad->dev.of_node, "lanes");
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if (!children)
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return -ENODEV;
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pad->lanes = devm_kcalloc(&pad->dev, pad->soc->num_lanes, sizeof(lane),
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GFP_KERNEL);
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if (!pad->lanes) {
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of_node_put(children);
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return -ENOMEM;
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}
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for (i = 0; i < pad->soc->num_lanes; i++) {
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struct device_node *np = tegra_xusb_pad_find_phy_node(pad, i);
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struct tegra_xusb_lane *lane;
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/* skip disabled lanes */
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if (!np || !of_device_is_available(np)) {
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of_node_put(np);
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continue;
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}
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pad->lanes[i] = phy_create(&pad->dev, np, ops);
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if (IS_ERR(pad->lanes[i])) {
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err = PTR_ERR(pad->lanes[i]);
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of_node_put(np);
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goto remove;
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}
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lane = pad->ops->probe(pad, np, i);
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if (IS_ERR(lane)) {
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phy_destroy(pad->lanes[i]);
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err = PTR_ERR(lane);
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goto remove;
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}
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list_add_tail(&lane->list, &pad->padctl->lanes);
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phy_set_drvdata(pad->lanes[i], lane);
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}
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pad->provider = of_phy_provider_register_full(&pad->dev, children,
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tegra_xusb_pad_of_xlate);
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if (IS_ERR(pad->provider)) {
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err = PTR_ERR(pad->provider);
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goto remove;
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}
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return 0;
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remove:
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while (i--)
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tegra_xusb_lane_destroy(pad->lanes[i]);
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of_node_put(children);
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return err;
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}
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void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad)
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{
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unsigned int i = pad->soc->num_lanes;
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of_phy_provider_unregister(pad->provider);
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while (i--)
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tegra_xusb_lane_destroy(pad->lanes[i]);
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device_unregister(&pad->dev);
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}
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static struct tegra_xusb_pad *
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tegra_xusb_pad_create(struct tegra_xusb_padctl *padctl,
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const struct tegra_xusb_pad_soc *soc)
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{
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struct tegra_xusb_pad *pad;
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struct device_node *np;
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int err;
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np = tegra_xusb_find_pad_node(padctl, soc->name);
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if (!np || !of_device_is_available(np))
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return NULL;
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pad = soc->ops->probe(padctl, soc, np);
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if (IS_ERR(pad)) {
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err = PTR_ERR(pad);
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dev_err(padctl->dev, "failed to create pad %s: %d\n",
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soc->name, err);
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return ERR_PTR(err);
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}
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/* XXX move this into ->probe() to avoid string comparison */
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if (strcmp(soc->name, "pcie") == 0)
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padctl->pcie = pad;
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if (strcmp(soc->name, "sata") == 0)
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padctl->sata = pad;
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if (strcmp(soc->name, "usb2") == 0)
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padctl->usb2 = pad;
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if (strcmp(soc->name, "ulpi") == 0)
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padctl->ulpi = pad;
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if (strcmp(soc->name, "hsic") == 0)
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padctl->hsic = pad;
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return pad;
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}
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static void __tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
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{
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struct tegra_xusb_pad *pad, *tmp;
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list_for_each_entry_safe_reverse(pad, tmp, &padctl->pads, list) {
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list_del(&pad->list);
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tegra_xusb_pad_unregister(pad);
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}
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}
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static void tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl)
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{
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mutex_lock(&padctl->lock);
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__tegra_xusb_remove_pads(padctl);
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mutex_unlock(&padctl->lock);
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}
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static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane)
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{
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struct tegra_xusb_padctl *padctl = lane->pad->padctl;
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const struct tegra_xusb_lane_soc *soc = lane->soc;
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u32 value;
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/* skip single function lanes */
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if (soc->num_funcs < 2)
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return;
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/* choose function */
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value = padctl_readl(padctl, soc->offset);
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value &= ~(soc->mask << soc->shift);
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value |= lane->function << soc->shift;
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padctl_writel(padctl, value, soc->offset);
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}
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static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad)
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{
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unsigned int i;
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for (i = 0; i < pad->soc->num_lanes; i++) {
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struct tegra_xusb_lane *lane;
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if (pad->lanes[i]) {
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lane = phy_get_drvdata(pad->lanes[i]);
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tegra_xusb_lane_program(lane);
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}
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}
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}
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static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl)
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{
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struct tegra_xusb_pad *pad;
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unsigned int i;
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mutex_lock(&padctl->lock);
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for (i = 0; i < padctl->soc->num_pads; i++) {
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const struct tegra_xusb_pad_soc *soc = padctl->soc->pads[i];
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int err;
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pad = tegra_xusb_pad_create(padctl, soc);
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if (IS_ERR(pad)) {
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err = PTR_ERR(pad);
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dev_err(padctl->dev, "failed to create pad %s: %d\n",
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soc->name, err);
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__tegra_xusb_remove_pads(padctl);
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mutex_unlock(&padctl->lock);
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return err;
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}
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if (!pad)
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continue;
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list_add_tail(&pad->list, &padctl->pads);
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}
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list_for_each_entry(pad, &padctl->pads, list)
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tegra_xusb_pad_program(pad);
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mutex_unlock(&padctl->lock);
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return 0;
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}
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static bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane,
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const char *function)
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{
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const char *func = lane->soc->funcs[lane->function];
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return strcmp(function, func) == 0;
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}
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struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl,
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const char *type,
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unsigned int index)
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{
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struct tegra_xusb_lane *lane, *hit = ERR_PTR(-ENODEV);
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char *name;
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name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
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if (!name)
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return ERR_PTR(-ENOMEM);
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list_for_each_entry(lane, &padctl->lanes, list) {
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if (strcmp(lane->soc->name, name) == 0) {
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hit = lane;
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break;
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}
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}
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kfree(name);
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return hit;
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}
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struct tegra_xusb_lane *
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tegra_xusb_port_find_lane(struct tegra_xusb_port *port,
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const struct tegra_xusb_lane_map *map,
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const char *function)
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{
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struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV);
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for (; map->type; map++) {
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if (port->index != map->port)
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continue;
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lane = tegra_xusb_find_lane(port->padctl, map->type,
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map->index);
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if (IS_ERR(lane))
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continue;
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if (!tegra_xusb_lane_check(lane, function))
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continue;
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if (!IS_ERR(match))
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dev_err(&port->dev, "conflicting match: %s-%u / %s\n",
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map->type, map->index, match->soc->name);
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else
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match = lane;
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}
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return match;
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}
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static struct device_node *
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tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type,
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unsigned int index)
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{
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struct device_node *ports, *np;
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char *name;
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ports = of_get_child_by_name(padctl->dev->of_node, "ports");
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if (!ports)
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return NULL;
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name = kasprintf(GFP_KERNEL, "%s-%u", type, index);
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if (!name) {
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of_node_put(ports);
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return ERR_PTR(-ENOMEM);
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}
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np = of_get_child_by_name(ports, name);
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kfree(name);
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of_node_put(ports);
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return np;
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}
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struct tegra_xusb_port *
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tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type,
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unsigned int index)
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{
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struct tegra_xusb_port *port;
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struct device_node *np;
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np = tegra_xusb_find_port_node(padctl, type, index);
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if (!np)
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return NULL;
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list_for_each_entry(port, &padctl->ports, list) {
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if (np == port->dev.of_node) {
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of_node_put(np);
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return port;
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}
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}
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of_node_put(np);
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return NULL;
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}
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|
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struct tegra_xusb_usb2_port *
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tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl, unsigned int index)
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{
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struct tegra_xusb_port *port;
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port = tegra_xusb_find_port(padctl, "usb2", index);
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if (port)
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return to_usb2_port(port);
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return NULL;
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}
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|
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struct tegra_xusb_usb3_port *
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tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl, unsigned int index)
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{
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struct tegra_xusb_port *port;
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port = tegra_xusb_find_port(padctl, "usb3", index);
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if (port)
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return to_usb3_port(port);
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return NULL;
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}
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|
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static void tegra_xusb_port_release(struct device *dev)
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{
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}
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static struct device_type tegra_xusb_port_type = {
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.release = tegra_xusb_port_release,
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};
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static int tegra_xusb_port_init(struct tegra_xusb_port *port,
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struct tegra_xusb_padctl *padctl,
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struct device_node *np,
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const char *name,
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unsigned int index)
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{
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int err;
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|
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INIT_LIST_HEAD(&port->list);
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port->padctl = padctl;
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port->index = index;
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device_initialize(&port->dev);
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port->dev.type = &tegra_xusb_port_type;
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port->dev.of_node = of_node_get(np);
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port->dev.parent = padctl->dev;
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|
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err = dev_set_name(&port->dev, "%s-%u", name, index);
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if (err < 0)
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goto unregister;
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err = device_add(&port->dev);
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if (err < 0)
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goto unregister;
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return 0;
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unregister:
|
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device_unregister(&port->dev);
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return err;
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}
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|
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static void tegra_xusb_port_unregister(struct tegra_xusb_port *port)
|
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{
|
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device_unregister(&port->dev);
|
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}
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|
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static const char *const modes[] = {
|
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[USB_DR_MODE_UNKNOWN] = "",
|
|
[USB_DR_MODE_HOST] = "host",
|
|
[USB_DR_MODE_PERIPHERAL] = "peripheral",
|
|
[USB_DR_MODE_OTG] = "otg",
|
|
};
|
|
|
|
static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2)
|
|
{
|
|
struct tegra_xusb_port *port = &usb2->base;
|
|
struct device_node *np = port->dev.of_node;
|
|
const char *mode;
|
|
|
|
usb2->internal = of_property_read_bool(np, "nvidia,internal");
|
|
|
|
if (!of_property_read_string(np, "mode", &mode)) {
|
|
int err = match_string(modes, ARRAY_SIZE(modes), mode);
|
|
if (err < 0) {
|
|
dev_err(&port->dev, "invalid value %s for \"mode\"\n",
|
|
mode);
|
|
usb2->mode = USB_DR_MODE_UNKNOWN;
|
|
} else {
|
|
usb2->mode = err;
|
|
}
|
|
} else {
|
|
usb2->mode = USB_DR_MODE_HOST;
|
|
}
|
|
|
|
usb2->supply = devm_regulator_get(&port->dev, "vbus");
|
|
return PTR_ERR_OR_ZERO(usb2->supply);
|
|
}
|
|
|
|
static int tegra_xusb_add_usb2_port(struct tegra_xusb_padctl *padctl,
|
|
unsigned int index)
|
|
{
|
|
struct tegra_xusb_usb2_port *usb2;
|
|
struct device_node *np;
|
|
int err = 0;
|
|
|
|
/*
|
|
* USB2 ports don't require additional properties, but if the port is
|
|
* marked as disabled there is no reason to register it.
|
|
*/
|
|
np = tegra_xusb_find_port_node(padctl, "usb2", index);
|
|
if (!np || !of_device_is_available(np))
|
|
goto out;
|
|
|
|
usb2 = devm_kzalloc(padctl->dev, sizeof(*usb2), GFP_KERNEL);
|
|
if (!usb2) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
err = tegra_xusb_port_init(&usb2->base, padctl, np, "usb2", index);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
usb2->base.ops = padctl->soc->ports.usb2.ops;
|
|
|
|
usb2->base.lane = usb2->base.ops->map(&usb2->base);
|
|
if (IS_ERR(usb2->base.lane)) {
|
|
err = PTR_ERR(usb2->base.lane);
|
|
goto out;
|
|
}
|
|
|
|
err = tegra_xusb_usb2_port_parse_dt(usb2);
|
|
if (err < 0) {
|
|
tegra_xusb_port_unregister(&usb2->base);
|
|
goto out;
|
|
}
|
|
|
|
list_add_tail(&usb2->base.list, &padctl->ports);
|
|
|
|
out:
|
|
of_node_put(np);
|
|
return err;
|
|
}
|
|
|
|
static int tegra_xusb_ulpi_port_parse_dt(struct tegra_xusb_ulpi_port *ulpi)
|
|
{
|
|
struct tegra_xusb_port *port = &ulpi->base;
|
|
struct device_node *np = port->dev.of_node;
|
|
|
|
ulpi->internal = of_property_read_bool(np, "nvidia,internal");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_xusb_add_ulpi_port(struct tegra_xusb_padctl *padctl,
|
|
unsigned int index)
|
|
{
|
|
struct tegra_xusb_ulpi_port *ulpi;
|
|
struct device_node *np;
|
|
int err = 0;
|
|
|
|
np = tegra_xusb_find_port_node(padctl, "ulpi", index);
|
|
if (!np || !of_device_is_available(np))
|
|
goto out;
|
|
|
|
ulpi = devm_kzalloc(padctl->dev, sizeof(*ulpi), GFP_KERNEL);
|
|
if (!ulpi) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
err = tegra_xusb_port_init(&ulpi->base, padctl, np, "ulpi", index);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
ulpi->base.ops = padctl->soc->ports.ulpi.ops;
|
|
|
|
ulpi->base.lane = ulpi->base.ops->map(&ulpi->base);
|
|
if (IS_ERR(ulpi->base.lane)) {
|
|
err = PTR_ERR(ulpi->base.lane);
|
|
goto out;
|
|
}
|
|
|
|
err = tegra_xusb_ulpi_port_parse_dt(ulpi);
|
|
if (err < 0) {
|
|
tegra_xusb_port_unregister(&ulpi->base);
|
|
goto out;
|
|
}
|
|
|
|
list_add_tail(&ulpi->base.list, &padctl->ports);
|
|
|
|
out:
|
|
of_node_put(np);
|
|
return err;
|
|
}
|
|
|
|
static int tegra_xusb_hsic_port_parse_dt(struct tegra_xusb_hsic_port *hsic)
|
|
{
|
|
/* XXX */
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_xusb_add_hsic_port(struct tegra_xusb_padctl *padctl,
|
|
unsigned int index)
|
|
{
|
|
struct tegra_xusb_hsic_port *hsic;
|
|
struct device_node *np;
|
|
int err = 0;
|
|
|
|
np = tegra_xusb_find_port_node(padctl, "hsic", index);
|
|
if (!np || !of_device_is_available(np))
|
|
goto out;
|
|
|
|
hsic = devm_kzalloc(padctl->dev, sizeof(*hsic), GFP_KERNEL);
|
|
if (!hsic) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
err = tegra_xusb_port_init(&hsic->base, padctl, np, "hsic", index);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
hsic->base.ops = padctl->soc->ports.hsic.ops;
|
|
|
|
hsic->base.lane = hsic->base.ops->map(&hsic->base);
|
|
if (IS_ERR(hsic->base.lane)) {
|
|
err = PTR_ERR(hsic->base.lane);
|
|
goto out;
|
|
}
|
|
|
|
err = tegra_xusb_hsic_port_parse_dt(hsic);
|
|
if (err < 0) {
|
|
tegra_xusb_port_unregister(&hsic->base);
|
|
goto out;
|
|
}
|
|
|
|
list_add_tail(&hsic->base.list, &padctl->ports);
|
|
|
|
out:
|
|
of_node_put(np);
|
|
return err;
|
|
}
|
|
|
|
static int tegra_xusb_usb3_port_parse_dt(struct tegra_xusb_usb3_port *usb3)
|
|
{
|
|
struct tegra_xusb_port *port = &usb3->base;
|
|
struct device_node *np = port->dev.of_node;
|
|
u32 value;
|
|
int err;
|
|
|
|
err = of_property_read_u32(np, "nvidia,usb2-companion", &value);
|
|
if (err < 0) {
|
|
dev_err(&port->dev, "failed to read port: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
usb3->port = value;
|
|
|
|
usb3->internal = of_property_read_bool(np, "nvidia,internal");
|
|
|
|
usb3->supply = devm_regulator_get(&port->dev, "vbus");
|
|
return PTR_ERR_OR_ZERO(usb3->supply);
|
|
}
|
|
|
|
static int tegra_xusb_add_usb3_port(struct tegra_xusb_padctl *padctl,
|
|
unsigned int index)
|
|
{
|
|
struct tegra_xusb_usb3_port *usb3;
|
|
struct device_node *np;
|
|
int err = 0;
|
|
|
|
/*
|
|
* If there is no supplemental configuration in the device tree the
|
|
* port is unusable. But it is valid to configure only a single port,
|
|
* hence return 0 instead of an error to allow ports to be optional.
|
|
*/
|
|
np = tegra_xusb_find_port_node(padctl, "usb3", index);
|
|
if (!np || !of_device_is_available(np))
|
|
goto out;
|
|
|
|
usb3 = devm_kzalloc(padctl->dev, sizeof(*usb3), GFP_KERNEL);
|
|
if (!usb3) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
err = tegra_xusb_port_init(&usb3->base, padctl, np, "usb3", index);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
usb3->base.ops = padctl->soc->ports.usb3.ops;
|
|
|
|
usb3->base.lane = usb3->base.ops->map(&usb3->base);
|
|
if (IS_ERR(usb3->base.lane)) {
|
|
err = PTR_ERR(usb3->base.lane);
|
|
goto out;
|
|
}
|
|
|
|
err = tegra_xusb_usb3_port_parse_dt(usb3);
|
|
if (err < 0) {
|
|
tegra_xusb_port_unregister(&usb3->base);
|
|
goto out;
|
|
}
|
|
|
|
list_add_tail(&usb3->base.list, &padctl->ports);
|
|
|
|
out:
|
|
of_node_put(np);
|
|
return err;
|
|
}
|
|
|
|
static void __tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
|
|
{
|
|
struct tegra_xusb_port *port, *tmp;
|
|
|
|
list_for_each_entry_safe_reverse(port, tmp, &padctl->ports, list) {
|
|
list_del(&port->list);
|
|
tegra_xusb_port_unregister(port);
|
|
}
|
|
}
|
|
|
|
static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl)
|
|
{
|
|
struct tegra_xusb_port *port;
|
|
unsigned int i;
|
|
int err = 0;
|
|
|
|
mutex_lock(&padctl->lock);
|
|
|
|
for (i = 0; i < padctl->soc->ports.usb2.count; i++) {
|
|
err = tegra_xusb_add_usb2_port(padctl, i);
|
|
if (err < 0)
|
|
goto remove_ports;
|
|
}
|
|
|
|
for (i = 0; i < padctl->soc->ports.ulpi.count; i++) {
|
|
err = tegra_xusb_add_ulpi_port(padctl, i);
|
|
if (err < 0)
|
|
goto remove_ports;
|
|
}
|
|
|
|
for (i = 0; i < padctl->soc->ports.hsic.count; i++) {
|
|
err = tegra_xusb_add_hsic_port(padctl, i);
|
|
if (err < 0)
|
|
goto remove_ports;
|
|
}
|
|
|
|
for (i = 0; i < padctl->soc->ports.usb3.count; i++) {
|
|
err = tegra_xusb_add_usb3_port(padctl, i);
|
|
if (err < 0)
|
|
goto remove_ports;
|
|
}
|
|
|
|
list_for_each_entry(port, &padctl->ports, list) {
|
|
err = port->ops->enable(port);
|
|
if (err < 0)
|
|
dev_err(padctl->dev, "failed to enable port %s: %d\n",
|
|
dev_name(&port->dev), err);
|
|
}
|
|
|
|
goto unlock;
|
|
|
|
remove_ports:
|
|
__tegra_xusb_remove_ports(padctl);
|
|
unlock:
|
|
mutex_unlock(&padctl->lock);
|
|
return err;
|
|
}
|
|
|
|
static void tegra_xusb_remove_ports(struct tegra_xusb_padctl *padctl)
|
|
{
|
|
mutex_lock(&padctl->lock);
|
|
__tegra_xusb_remove_ports(padctl);
|
|
mutex_unlock(&padctl->lock);
|
|
}
|
|
|
|
static int tegra_xusb_padctl_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
const struct tegra_xusb_padctl_soc *soc;
|
|
struct tegra_xusb_padctl *padctl;
|
|
const struct of_device_id *match;
|
|
struct resource *res;
|
|
unsigned int i;
|
|
int err;
|
|
|
|
/* for backwards compatibility with old device trees */
|
|
np = of_get_child_by_name(np, "pads");
|
|
if (!np) {
|
|
dev_warn(&pdev->dev, "deprecated DT, using legacy driver\n");
|
|
return tegra_xusb_padctl_legacy_probe(pdev);
|
|
}
|
|
|
|
of_node_put(np);
|
|
|
|
match = of_match_node(tegra_xusb_padctl_of_match, pdev->dev.of_node);
|
|
soc = match->data;
|
|
|
|
padctl = soc->ops->probe(&pdev->dev, soc);
|
|
if (IS_ERR(padctl))
|
|
return PTR_ERR(padctl);
|
|
|
|
platform_set_drvdata(pdev, padctl);
|
|
INIT_LIST_HEAD(&padctl->ports);
|
|
INIT_LIST_HEAD(&padctl->lanes);
|
|
INIT_LIST_HEAD(&padctl->pads);
|
|
mutex_init(&padctl->lock);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
padctl->regs = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(padctl->regs)) {
|
|
err = PTR_ERR(padctl->regs);
|
|
goto remove;
|
|
}
|
|
|
|
padctl->rst = devm_reset_control_get(&pdev->dev, NULL);
|
|
if (IS_ERR(padctl->rst)) {
|
|
err = PTR_ERR(padctl->rst);
|
|
goto remove;
|
|
}
|
|
|
|
padctl->supplies = devm_kcalloc(&pdev->dev, padctl->soc->num_supplies,
|
|
sizeof(*padctl->supplies), GFP_KERNEL);
|
|
if (!padctl->supplies) {
|
|
err = -ENOMEM;
|
|
goto remove;
|
|
}
|
|
|
|
for (i = 0; i < padctl->soc->num_supplies; i++)
|
|
padctl->supplies[i].supply = padctl->soc->supply_names[i];
|
|
|
|
err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies,
|
|
padctl->supplies);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed to get regulators: %d\n", err);
|
|
goto remove;
|
|
}
|
|
|
|
err = reset_control_deassert(padctl->rst);
|
|
if (err < 0)
|
|
goto remove;
|
|
|
|
err = regulator_bulk_enable(padctl->soc->num_supplies,
|
|
padctl->supplies);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed to enable supplies: %d\n", err);
|
|
goto reset;
|
|
}
|
|
|
|
err = tegra_xusb_setup_pads(padctl);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "failed to setup pads: %d\n", err);
|
|
goto power_down;
|
|
}
|
|
|
|
err = tegra_xusb_setup_ports(padctl);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "failed to setup XUSB ports: %d\n", err);
|
|
goto remove_pads;
|
|
}
|
|
|
|
return 0;
|
|
|
|
remove_pads:
|
|
tegra_xusb_remove_pads(padctl);
|
|
power_down:
|
|
regulator_bulk_disable(padctl->soc->num_supplies, padctl->supplies);
|
|
reset:
|
|
reset_control_assert(padctl->rst);
|
|
remove:
|
|
soc->ops->remove(padctl);
|
|
return err;
|
|
}
|
|
|
|
static int tegra_xusb_padctl_remove(struct platform_device *pdev)
|
|
{
|
|
struct tegra_xusb_padctl *padctl = platform_get_drvdata(pdev);
|
|
int err;
|
|
|
|
tegra_xusb_remove_ports(padctl);
|
|
tegra_xusb_remove_pads(padctl);
|
|
|
|
err = regulator_bulk_disable(padctl->soc->num_supplies,
|
|
padctl->supplies);
|
|
if (err < 0)
|
|
dev_err(&pdev->dev, "failed to disable supplies: %d\n", err);
|
|
|
|
err = reset_control_assert(padctl->rst);
|
|
if (err < 0)
|
|
dev_err(&pdev->dev, "failed to assert reset: %d\n", err);
|
|
|
|
padctl->soc->ops->remove(padctl);
|
|
|
|
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);
|
|
|
|
struct tegra_xusb_padctl *tegra_xusb_padctl_get(struct device *dev)
|
|
{
|
|
struct tegra_xusb_padctl *padctl;
|
|
struct platform_device *pdev;
|
|
struct device_node *np;
|
|
|
|
np = of_parse_phandle(dev->of_node, "nvidia,xusb-padctl", 0);
|
|
if (!np)
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
/*
|
|
* This is slightly ugly. A better implementation would be to keep a
|
|
* registry of pad controllers, but since there will almost certainly
|
|
* only ever be one per SoC that would be a little overkill.
|
|
*/
|
|
pdev = of_find_device_by_node(np);
|
|
if (!pdev) {
|
|
of_node_put(np);
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
of_node_put(np);
|
|
|
|
padctl = platform_get_drvdata(pdev);
|
|
if (!padctl) {
|
|
put_device(&pdev->dev);
|
|
return ERR_PTR(-EPROBE_DEFER);
|
|
}
|
|
|
|
return padctl;
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get);
|
|
|
|
void tegra_xusb_padctl_put(struct tegra_xusb_padctl *padctl)
|
|
{
|
|
if (padctl)
|
|
put_device(padctl->dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_put);
|
|
|
|
int tegra_xusb_padctl_usb3_save_context(struct tegra_xusb_padctl *padctl,
|
|
unsigned int port)
|
|
{
|
|
if (padctl->soc->ops->usb3_save_context)
|
|
return padctl->soc->ops->usb3_save_context(padctl, port);
|
|
|
|
return -ENOSYS;
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_save_context);
|
|
|
|
int tegra_xusb_padctl_hsic_set_idle(struct tegra_xusb_padctl *padctl,
|
|
unsigned int port, bool idle)
|
|
{
|
|
if (padctl->soc->ops->hsic_set_idle)
|
|
return padctl->soc->ops->hsic_set_idle(padctl, port, idle);
|
|
|
|
return -ENOSYS;
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_hsic_set_idle);
|
|
|
|
int tegra_xusb_padctl_usb3_set_lfps_detect(struct tegra_xusb_padctl *padctl,
|
|
unsigned int port, bool enable)
|
|
{
|
|
if (padctl->soc->ops->usb3_set_lfps_detect)
|
|
return padctl->soc->ops->usb3_set_lfps_detect(padctl, port,
|
|
enable);
|
|
|
|
return -ENOSYS;
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_usb3_set_lfps_detect);
|
|
|
|
MODULE_AUTHOR("Thierry Reding <treding@nvidia.com>");
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MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver");
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MODULE_LICENSE("GPL v2");
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