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1396 lines
31 KiB
1396 lines
31 KiB
// 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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|
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#include <soc/tegra/fuse.h> |
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|
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#include "xusb.h" |
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|
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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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|
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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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|
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return phy; |
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} |
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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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#if defined(CONFIG_ARCH_TEGRA_194_SOC) |
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{ |
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.compatible = "nvidia,tegra194-xusb-padctl", |
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.data = &tegra194_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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|
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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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|
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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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|
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np = of_get_child_by_name(pads, name); |
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of_node_put(pads); |
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|
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return np; |
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} |
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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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|
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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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|
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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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|
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return np; |
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} |
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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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|
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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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|
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lane->function = err; |
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|
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return 0; |
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} |
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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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|
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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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|
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pad->soc->ops->remove(pad); |
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} |
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|
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static const struct device_type tegra_xusb_pad_type = { |
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.release = tegra_xusb_pad_release, |
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}; |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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return 0; |
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|
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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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|
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of_node_put(children); |
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|
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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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|
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of_phy_provider_unregister(pad->provider); |
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|
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while (i--) |
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tegra_xusb_lane_destroy(pad->lanes[i]); |
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|
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device_unregister(&pad->dev); |
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} |
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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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|
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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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|
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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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|
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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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|
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if (strcmp(soc->name, "sata") == 0) |
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padctl->sata = pad; |
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|
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if (strcmp(soc->name, "usb2") == 0) |
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padctl->usb2 = pad; |
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|
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if (strcmp(soc->name, "ulpi") == 0) |
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padctl->ulpi = pad; |
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|
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if (strcmp(soc->name, "hsic") == 0) |
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padctl->hsic = pad; |
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|
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return 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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struct tegra_xusb_pad *pad, *tmp; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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mutex_lock(&padctl->lock); |
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|
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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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|
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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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|
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list_add_tail(&pad->list, &padctl->pads); |
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} |
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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, |
|
const struct tegra_xusb_lane_map *map, |
|
const char *function) |
|
{ |
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struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV); |
|
|
|
for (; map->type; map++) { |
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if (port->index != map->port) |
|
continue; |
|
|
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lane = tegra_xusb_find_lane(port->padctl, map->type, |
|
map->index); |
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if (IS_ERR(lane)) |
|
continue; |
|
|
|
if (!tegra_xusb_lane_check(lane, function)) |
|
continue; |
|
|
|
if (!IS_ERR(match)) |
|
dev_err(&port->dev, "conflicting match: %s-%u / %s\n", |
|
map->type, map->index, match->soc->name); |
|
else |
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match = lane; |
|
} |
|
|
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return match; |
|
} |
|
|
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static struct device_node * |
|
tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type, |
|
unsigned int index) |
|
{ |
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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) |
|
return NULL; |
|
|
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name = kasprintf(GFP_KERNEL, "%s-%u", type, index); |
|
if (!name) { |
|
of_node_put(ports); |
|
return ERR_PTR(-ENOMEM); |
|
} |
|
np = of_get_child_by_name(ports, name); |
|
kfree(name); |
|
of_node_put(ports); |
|
|
|
return np; |
|
} |
|
|
|
struct tegra_xusb_port * |
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tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type, |
|
unsigned int index) |
|
{ |
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struct tegra_xusb_port *port; |
|
struct device_node *np; |
|
|
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np = tegra_xusb_find_port_node(padctl, type, index); |
|
if (!np) |
|
return NULL; |
|
|
|
list_for_each_entry(port, &padctl->ports, list) { |
|
if (np == port->dev.of_node) { |
|
of_node_put(np); |
|
return port; |
|
} |
|
} |
|
|
|
of_node_put(np); |
|
|
|
return NULL; |
|
} |
|
|
|
struct tegra_xusb_usb2_port * |
|
tegra_xusb_find_usb2_port(struct tegra_xusb_padctl *padctl, unsigned int index) |
|
{ |
|
struct tegra_xusb_port *port; |
|
|
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port = tegra_xusb_find_port(padctl, "usb2", index); |
|
if (port) |
|
return to_usb2_port(port); |
|
|
|
return NULL; |
|
} |
|
|
|
struct tegra_xusb_usb3_port * |
|
tegra_xusb_find_usb3_port(struct tegra_xusb_padctl *padctl, unsigned int index) |
|
{ |
|
struct tegra_xusb_port *port; |
|
|
|
port = tegra_xusb_find_port(padctl, "usb3", index); |
|
if (port) |
|
return to_usb3_port(port); |
|
|
|
return NULL; |
|
} |
|
|
|
static void tegra_xusb_port_release(struct device *dev) |
|
{ |
|
struct tegra_xusb_port *port = to_tegra_xusb_port(dev); |
|
|
|
if (port->ops->release) |
|
port->ops->release(port); |
|
} |
|
|
|
static const struct device_type tegra_xusb_port_type = { |
|
.release = tegra_xusb_port_release, |
|
}; |
|
|
|
static int tegra_xusb_port_init(struct tegra_xusb_port *port, |
|
struct tegra_xusb_padctl *padctl, |
|
struct device_node *np, |
|
const char *name, |
|
unsigned int index) |
|
{ |
|
int err; |
|
|
|
INIT_LIST_HEAD(&port->list); |
|
port->padctl = padctl; |
|
port->index = index; |
|
|
|
device_initialize(&port->dev); |
|
port->dev.type = &tegra_xusb_port_type; |
|
port->dev.of_node = of_node_get(np); |
|
port->dev.parent = padctl->dev; |
|
|
|
err = dev_set_name(&port->dev, "%s-%u", name, index); |
|
if (err < 0) |
|
goto unregister; |
|
|
|
err = device_add(&port->dev); |
|
if (err < 0) |
|
goto unregister; |
|
|
|
return 0; |
|
|
|
unregister: |
|
device_unregister(&port->dev); |
|
return err; |
|
} |
|
|
|
static void tegra_xusb_port_unregister(struct tegra_xusb_port *port) |
|
{ |
|
if (!IS_ERR_OR_NULL(port->usb_role_sw)) { |
|
of_platform_depopulate(&port->dev); |
|
usb_role_switch_unregister(port->usb_role_sw); |
|
cancel_work_sync(&port->usb_phy_work); |
|
usb_remove_phy(&port->usb_phy); |
|
} |
|
|
|
if (port->ops->remove) |
|
port->ops->remove(port); |
|
|
|
device_unregister(&port->dev); |
|
} |
|
|
|
static const char *const modes[] = { |
|
[USB_DR_MODE_UNKNOWN] = "", |
|
[USB_DR_MODE_HOST] = "host", |
|
[USB_DR_MODE_PERIPHERAL] = "peripheral", |
|
[USB_DR_MODE_OTG] = "otg", |
|
}; |
|
|
|
static const char * const usb_roles[] = { |
|
[USB_ROLE_NONE] = "none", |
|
[USB_ROLE_HOST] = "host", |
|
[USB_ROLE_DEVICE] = "device", |
|
}; |
|
|
|
static enum usb_phy_events to_usb_phy_event(enum usb_role role) |
|
{ |
|
switch (role) { |
|
case USB_ROLE_DEVICE: |
|
return USB_EVENT_VBUS; |
|
|
|
case USB_ROLE_HOST: |
|
return USB_EVENT_ID; |
|
|
|
default: |
|
return USB_EVENT_NONE; |
|
} |
|
} |
|
|
|
static void tegra_xusb_usb_phy_work(struct work_struct *work) |
|
{ |
|
struct tegra_xusb_port *port = container_of(work, |
|
struct tegra_xusb_port, |
|
usb_phy_work); |
|
enum usb_role role = usb_role_switch_get_role(port->usb_role_sw); |
|
|
|
usb_phy_set_event(&port->usb_phy, to_usb_phy_event(role)); |
|
|
|
dev_dbg(&port->dev, "%s(): calling notifier for role %s\n", __func__, |
|
usb_roles[role]); |
|
|
|
atomic_notifier_call_chain(&port->usb_phy.notifier, 0, &port->usb_phy); |
|
} |
|
|
|
static int tegra_xusb_role_sw_set(struct usb_role_switch *sw, |
|
enum usb_role role) |
|
{ |
|
struct tegra_xusb_port *port = usb_role_switch_get_drvdata(sw); |
|
|
|
dev_dbg(&port->dev, "%s(): role %s\n", __func__, usb_roles[role]); |
|
|
|
schedule_work(&port->usb_phy_work); |
|
|
|
return 0; |
|
} |
|
|
|
static int tegra_xusb_set_peripheral(struct usb_otg *otg, |
|
struct usb_gadget *gadget) |
|
{ |
|
struct tegra_xusb_port *port = container_of(otg->usb_phy, |
|
struct tegra_xusb_port, |
|
usb_phy); |
|
|
|
if (gadget != NULL) |
|
schedule_work(&port->usb_phy_work); |
|
|
|
return 0; |
|
} |
|
|
|
static int tegra_xusb_set_host(struct usb_otg *otg, struct usb_bus *host) |
|
{ |
|
struct tegra_xusb_port *port = container_of(otg->usb_phy, |
|
struct tegra_xusb_port, |
|
usb_phy); |
|
|
|
if (host != NULL) |
|
schedule_work(&port->usb_phy_work); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
static int tegra_xusb_setup_usb_role_switch(struct tegra_xusb_port *port) |
|
{ |
|
struct tegra_xusb_lane *lane; |
|
struct usb_role_switch_desc role_sx_desc = { |
|
.fwnode = dev_fwnode(&port->dev), |
|
.set = tegra_xusb_role_sw_set, |
|
}; |
|
int err = 0; |
|
|
|
/* |
|
* USB role switch driver needs parent driver owner info. This is a |
|
* suboptimal solution. TODO: Need to revisit this in a follow-up patch |
|
* where an optimal solution is possible with changes to USB role |
|
* switch driver. |
|
*/ |
|
port->dev.driver = devm_kzalloc(&port->dev, |
|
sizeof(struct device_driver), |
|
GFP_KERNEL); |
|
port->dev.driver->owner = THIS_MODULE; |
|
|
|
port->usb_role_sw = usb_role_switch_register(&port->dev, |
|
&role_sx_desc); |
|
if (IS_ERR(port->usb_role_sw)) { |
|
err = PTR_ERR(port->usb_role_sw); |
|
dev_err(&port->dev, "failed to register USB role switch: %d", |
|
err); |
|
return err; |
|
} |
|
|
|
INIT_WORK(&port->usb_phy_work, tegra_xusb_usb_phy_work); |
|
usb_role_switch_set_drvdata(port->usb_role_sw, port); |
|
|
|
port->usb_phy.otg = devm_kzalloc(&port->dev, sizeof(struct usb_otg), |
|
GFP_KERNEL); |
|
if (!port->usb_phy.otg) |
|
return -ENOMEM; |
|
|
|
lane = tegra_xusb_find_lane(port->padctl, "usb2", port->index); |
|
|
|
/* |
|
* Assign phy dev to usb-phy dev. Host/device drivers can use phy |
|
* reference to retrieve usb-phy details. |
|
*/ |
|
port->usb_phy.dev = &lane->pad->lanes[port->index]->dev; |
|
port->usb_phy.dev->driver = port->dev.driver; |
|
port->usb_phy.otg->usb_phy = &port->usb_phy; |
|
port->usb_phy.otg->set_peripheral = tegra_xusb_set_peripheral; |
|
port->usb_phy.otg->set_host = tegra_xusb_set_host; |
|
|
|
err = usb_add_phy_dev(&port->usb_phy); |
|
if (err < 0) { |
|
dev_err(&port->dev, "Failed to add USB PHY: %d\n", err); |
|
return err; |
|
} |
|
|
|
/* populate connector entry */ |
|
of_platform_populate(port->dev.of_node, NULL, NULL, &port->dev); |
|
|
|
return err; |
|
} |
|
|
|
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; |
|
int err; |
|
|
|
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; |
|
} |
|
|
|
/* usb-role-switch property is mandatory for OTG/Peripheral modes */ |
|
if (usb2->mode == USB_DR_MODE_PERIPHERAL || |
|
usb2->mode == USB_DR_MODE_OTG) { |
|
if (of_property_read_bool(np, "usb-role-switch")) { |
|
err = tegra_xusb_setup_usb_role_switch(port); |
|
if (err < 0) |
|
return err; |
|
} else { |
|
dev_err(&port->dev, "usb-role-switch not found for %s mode", |
|
modes[usb2->mode]); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
usb2->supply = 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 = kzalloc(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; |
|
} |
|
|
|
void tegra_xusb_usb2_port_release(struct tegra_xusb_port *port) |
|
{ |
|
struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port); |
|
|
|
kfree(usb2); |
|
} |
|
|
|
void tegra_xusb_usb2_port_remove(struct tegra_xusb_port *port) |
|
{ |
|
struct tegra_xusb_usb2_port *usb2 = to_usb2_port(port); |
|
|
|
regulator_put(usb2->supply); |
|
} |
|
|
|
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 = kzalloc(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; |
|
} |
|
|
|
void tegra_xusb_ulpi_port_release(struct tegra_xusb_port *port) |
|
{ |
|
struct tegra_xusb_ulpi_port *ulpi = to_ulpi_port(port); |
|
|
|
kfree(ulpi); |
|
} |
|
|
|
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 = kzalloc(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; |
|
} |
|
|
|
void tegra_xusb_hsic_port_release(struct tegra_xusb_port *port) |
|
{ |
|
struct tegra_xusb_hsic_port *hsic = to_hsic_port(port); |
|
|
|
kfree(hsic); |
|
} |
|
|
|
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; |
|
enum usb_device_speed maximum_speed; |
|
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"); |
|
|
|
if (device_property_present(&port->dev, "maximum-speed")) { |
|
maximum_speed = usb_get_maximum_speed(&port->dev); |
|
if (maximum_speed == USB_SPEED_SUPER) |
|
usb3->disable_gen2 = true; |
|
else if (maximum_speed == USB_SPEED_SUPER_PLUS) |
|
usb3->disable_gen2 = false; |
|
else |
|
return -EINVAL; |
|
} |
|
|
|
usb3->supply = 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 = kzalloc(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; |
|
} |
|
|
|
void tegra_xusb_usb3_port_release(struct tegra_xusb_port *port) |
|
{ |
|
struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port); |
|
|
|
kfree(usb3); |
|
} |
|
|
|
void tegra_xusb_usb3_port_remove(struct tegra_xusb_port *port) |
|
{ |
|
struct tegra_xusb_usb3_port *usb3 = to_usb3_port(port); |
|
|
|
regulator_put(usb3->supply); |
|
} |
|
|
|
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_find_unused_usb3_port(struct tegra_xusb_padctl *padctl) |
|
{ |
|
struct device_node *np; |
|
unsigned int i; |
|
|
|
for (i = 0; i < padctl->soc->ports.usb3.count; i++) { |
|
np = tegra_xusb_find_port_node(padctl, "usb3", i); |
|
if (!np || !of_device_is_available(np)) |
|
return i; |
|
} |
|
|
|
return -ENODEV; |
|
} |
|
|
|
static bool tegra_xusb_port_is_companion(struct tegra_xusb_usb2_port *usb2) |
|
{ |
|
unsigned int i; |
|
struct tegra_xusb_usb3_port *usb3; |
|
struct tegra_xusb_padctl *padctl = usb2->base.padctl; |
|
|
|
for (i = 0; i < padctl->soc->ports.usb3.count; i++) { |
|
usb3 = tegra_xusb_find_usb3_port(padctl, i); |
|
if (usb3 && usb3->port == usb2->base.index) |
|
return true; |
|
} |
|
|
|
return false; |
|
} |
|
|
|
static int tegra_xusb_update_usb3_fake_port(struct tegra_xusb_usb2_port *usb2) |
|
{ |
|
int fake; |
|
|
|
/* Disable usb3_port_fake usage by default and assign if needed */ |
|
usb2->usb3_port_fake = -1; |
|
|
|
if ((usb2->mode == USB_DR_MODE_OTG || |
|
usb2->mode == USB_DR_MODE_PERIPHERAL) && |
|
!tegra_xusb_port_is_companion(usb2)) { |
|
fake = tegra_xusb_find_unused_usb3_port(usb2->base.padctl); |
|
if (fake < 0) { |
|
dev_err(&usb2->base.dev, "no unused USB3 ports available\n"); |
|
return -ENODEV; |
|
} |
|
|
|
dev_dbg(&usb2->base.dev, "Found unused usb3 port: %d\n", fake); |
|
usb2->usb3_port_fake = fake; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int tegra_xusb_setup_ports(struct tegra_xusb_padctl *padctl) |
|
{ |
|
struct tegra_xusb_port *port; |
|
struct tegra_xusb_usb2_port *usb2; |
|
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; |
|
} |
|
|
|
if (padctl->soc->need_fake_usb3_port) { |
|
for (i = 0; i < padctl->soc->ports.usb2.count; i++) { |
|
usb2 = tegra_xusb_find_usb2_port(padctl, i); |
|
if (!usb2) |
|
continue; |
|
|
|
err = tegra_xusb_update_usb3_fake_port(usb2); |
|
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; |
|
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); |
|
|
|
padctl->regs = devm_platform_ioremap_resource(pdev, 0); |
|
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; |
|
} |
|
|
|
regulator_bulk_set_supply_names(padctl->supplies, |
|
padctl->soc->supply_names, |
|
padctl->soc->num_supplies); |
|
|
|
err = devm_regulator_bulk_get(&pdev->dev, padctl->soc->num_supplies, |
|
padctl->supplies); |
|
if (err < 0) { |
|
dev_err_probe(&pdev->dev, err, "failed to get regulators\n"); |
|
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) { |
|
const char *level = KERN_ERR; |
|
|
|
if (err == -EPROBE_DEFER) |
|
level = KERN_DEBUG; |
|
|
|
dev_printk(level, &pdev->dev, |
|
dev_fmt("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: |
|
platform_set_drvdata(pdev, NULL); |
|
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); |
|
|
|
int tegra_xusb_padctl_set_vbus_override(struct tegra_xusb_padctl *padctl, |
|
bool val) |
|
{ |
|
if (padctl->soc->ops->vbus_override) |
|
return padctl->soc->ops->vbus_override(padctl, val); |
|
|
|
return -ENOTSUPP; |
|
} |
|
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_set_vbus_override); |
|
|
|
int tegra_phy_xusb_utmi_port_reset(struct phy *phy) |
|
{ |
|
struct tegra_xusb_lane *lane = phy_get_drvdata(phy); |
|
struct tegra_xusb_padctl *padctl = lane->pad->padctl; |
|
|
|
if (padctl->soc->ops->utmi_port_reset) |
|
return padctl->soc->ops->utmi_port_reset(phy); |
|
|
|
return -ENOTSUPP; |
|
} |
|
EXPORT_SYMBOL_GPL(tegra_phy_xusb_utmi_port_reset); |
|
|
|
int tegra_xusb_padctl_get_usb3_companion(struct tegra_xusb_padctl *padctl, |
|
unsigned int port) |
|
{ |
|
struct tegra_xusb_usb2_port *usb2; |
|
struct tegra_xusb_usb3_port *usb3; |
|
int i; |
|
|
|
usb2 = tegra_xusb_find_usb2_port(padctl, port); |
|
if (!usb2) |
|
return -EINVAL; |
|
|
|
for (i = 0; i < padctl->soc->ports.usb3.count; i++) { |
|
usb3 = tegra_xusb_find_usb3_port(padctl, i); |
|
if (usb3 && usb3->port == usb2->base.index) |
|
return usb3->base.index; |
|
} |
|
|
|
return -ENODEV; |
|
} |
|
EXPORT_SYMBOL_GPL(tegra_xusb_padctl_get_usb3_companion); |
|
|
|
MODULE_AUTHOR("Thierry Reding <[email protected]>"); |
|
MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|