| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (c) 2014-2016, NVIDIA CORPORATION. All rights reserved. |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/io.h> |
| #include <linux/mailbox_client.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/of_device.h> |
| #include <linux/phy/phy.h> |
| #include <linux/phy/tegra/xusb.h> |
| #include <linux/platform_device.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/reset.h> |
| #include <linux/slab.h> |
| #include <linux/workqueue.h> |
| |
| #include <soc/tegra/fuse.h> |
| |
| #include "xusb.h" |
| |
| static struct phy *tegra_xusb_pad_of_xlate(struct device *dev, |
| struct of_phandle_args *args) |
| { |
| struct tegra_xusb_pad *pad = dev_get_drvdata(dev); |
| struct phy *phy = NULL; |
| unsigned int i; |
| |
| if (args->args_count != 0) |
| return ERR_PTR(-EINVAL); |
| |
| for (i = 0; i < pad->soc->num_lanes; i++) { |
| if (!pad->lanes[i]) |
| continue; |
| |
| if (pad->lanes[i]->dev.of_node == args->np) { |
| phy = pad->lanes[i]; |
| break; |
| } |
| } |
| |
| if (phy == NULL) |
| phy = ERR_PTR(-ENODEV); |
| |
| return phy; |
| } |
| |
| static const struct of_device_id tegra_xusb_padctl_of_match[] = { |
| #if defined(CONFIG_ARCH_TEGRA_124_SOC) || defined(CONFIG_ARCH_TEGRA_132_SOC) |
| { |
| .compatible = "nvidia,tegra124-xusb-padctl", |
| .data = &tegra124_xusb_padctl_soc, |
| }, |
| #endif |
| #if defined(CONFIG_ARCH_TEGRA_210_SOC) |
| { |
| .compatible = "nvidia,tegra210-xusb-padctl", |
| .data = &tegra210_xusb_padctl_soc, |
| }, |
| #endif |
| #if defined(CONFIG_ARCH_TEGRA_186_SOC) |
| { |
| .compatible = "nvidia,tegra186-xusb-padctl", |
| .data = &tegra186_xusb_padctl_soc, |
| }, |
| #endif |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, tegra_xusb_padctl_of_match); |
| |
| static struct device_node * |
| tegra_xusb_find_pad_node(struct tegra_xusb_padctl *padctl, const char *name) |
| { |
| struct device_node *pads, *np; |
| |
| pads = of_get_child_by_name(padctl->dev->of_node, "pads"); |
| if (!pads) |
| return NULL; |
| |
| np = of_get_child_by_name(pads, name); |
| of_node_put(pads); |
| |
| return np; |
| } |
| |
| static struct device_node * |
| tegra_xusb_pad_find_phy_node(struct tegra_xusb_pad *pad, unsigned int index) |
| { |
| struct device_node *np, *lanes; |
| |
| lanes = of_get_child_by_name(pad->dev.of_node, "lanes"); |
| if (!lanes) |
| return NULL; |
| |
| np = of_get_child_by_name(lanes, pad->soc->lanes[index].name); |
| of_node_put(lanes); |
| |
| return np; |
| } |
| |
| int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane, |
| struct device_node *np) |
| { |
| struct device *dev = &lane->pad->dev; |
| const char *function; |
| int err; |
| |
| err = of_property_read_string(np, "nvidia,function", &function); |
| if (err < 0) |
| return err; |
| |
| err = match_string(lane->soc->funcs, lane->soc->num_funcs, function); |
| if (err < 0) { |
| dev_err(dev, "invalid function \"%s\" for lane \"%pOFn\"\n", |
| function, np); |
| return err; |
| } |
| |
| lane->function = err; |
| |
| return 0; |
| } |
| |
| static void tegra_xusb_lane_destroy(struct phy *phy) |
| { |
| if (phy) { |
| struct tegra_xusb_lane *lane = phy_get_drvdata(phy); |
| |
| lane->pad->ops->remove(lane); |
| phy_destroy(phy); |
| } |
| } |
| |
| static void tegra_xusb_pad_release(struct device *dev) |
| { |
| struct tegra_xusb_pad *pad = to_tegra_xusb_pad(dev); |
| |
| pad->soc->ops->remove(pad); |
| } |
| |
| static struct device_type tegra_xusb_pad_type = { |
| .release = tegra_xusb_pad_release, |
| }; |
| |
| int tegra_xusb_pad_init(struct tegra_xusb_pad *pad, |
| struct tegra_xusb_padctl *padctl, |
| struct device_node *np) |
| { |
| int err; |
| |
| device_initialize(&pad->dev); |
| INIT_LIST_HEAD(&pad->list); |
| pad->dev.parent = padctl->dev; |
| pad->dev.type = &tegra_xusb_pad_type; |
| pad->dev.of_node = np; |
| pad->padctl = padctl; |
| |
| err = dev_set_name(&pad->dev, "%s", pad->soc->name); |
| if (err < 0) |
| goto unregister; |
| |
| err = device_add(&pad->dev); |
| if (err < 0) |
| goto unregister; |
| |
| return 0; |
| |
| unregister: |
| device_unregister(&pad->dev); |
| return err; |
| } |
| |
| int tegra_xusb_pad_register(struct tegra_xusb_pad *pad, |
| const struct phy_ops *ops) |
| { |
| struct device_node *children; |
| struct phy *lane; |
| unsigned int i; |
| int err; |
| |
| children = of_get_child_by_name(pad->dev.of_node, "lanes"); |
| if (!children) |
| return -ENODEV; |
| |
| pad->lanes = devm_kcalloc(&pad->dev, pad->soc->num_lanes, sizeof(lane), |
| GFP_KERNEL); |
| if (!pad->lanes) { |
| of_node_put(children); |
| return -ENOMEM; |
| } |
| |
| for (i = 0; i < pad->soc->num_lanes; i++) { |
| struct device_node *np = tegra_xusb_pad_find_phy_node(pad, i); |
| struct tegra_xusb_lane *lane; |
| |
| /* skip disabled lanes */ |
| if (!np || !of_device_is_available(np)) { |
| of_node_put(np); |
| continue; |
| } |
| |
| pad->lanes[i] = phy_create(&pad->dev, np, ops); |
| if (IS_ERR(pad->lanes[i])) { |
| err = PTR_ERR(pad->lanes[i]); |
| of_node_put(np); |
| goto remove; |
| } |
| |
| lane = pad->ops->probe(pad, np, i); |
| if (IS_ERR(lane)) { |
| phy_destroy(pad->lanes[i]); |
| err = PTR_ERR(lane); |
| goto remove; |
| } |
| |
| list_add_tail(&lane->list, &pad->padctl->lanes); |
| phy_set_drvdata(pad->lanes[i], lane); |
| } |
| |
| pad->provider = of_phy_provider_register_full(&pad->dev, children, |
| tegra_xusb_pad_of_xlate); |
| if (IS_ERR(pad->provider)) { |
| err = PTR_ERR(pad->provider); |
| goto remove; |
| } |
| |
| return 0; |
| |
| remove: |
| while (i--) |
| tegra_xusb_lane_destroy(pad->lanes[i]); |
| |
| of_node_put(children); |
| |
| return err; |
| } |
| |
| void tegra_xusb_pad_unregister(struct tegra_xusb_pad *pad) |
| { |
| unsigned int i = pad->soc->num_lanes; |
| |
| of_phy_provider_unregister(pad->provider); |
| |
| while (i--) |
| tegra_xusb_lane_destroy(pad->lanes[i]); |
| |
| device_unregister(&pad->dev); |
| } |
| |
| static struct tegra_xusb_pad * |
| tegra_xusb_pad_create(struct tegra_xusb_padctl *padctl, |
| const struct tegra_xusb_pad_soc *soc) |
| { |
| struct tegra_xusb_pad *pad; |
| struct device_node *np; |
| int err; |
| |
| np = tegra_xusb_find_pad_node(padctl, soc->name); |
| if (!np || !of_device_is_available(np)) |
| return NULL; |
| |
| pad = soc->ops->probe(padctl, soc, np); |
| if (IS_ERR(pad)) { |
| err = PTR_ERR(pad); |
| dev_err(padctl->dev, "failed to create pad %s: %d\n", |
| soc->name, err); |
| return ERR_PTR(err); |
| } |
| |
| /* XXX move this into ->probe() to avoid string comparison */ |
| if (strcmp(soc->name, "pcie") == 0) |
| padctl->pcie = pad; |
| |
| if (strcmp(soc->name, "sata") == 0) |
| padctl->sata = pad; |
| |
| if (strcmp(soc->name, "usb2") == 0) |
| padctl->usb2 = pad; |
| |
| if (strcmp(soc->name, "ulpi") == 0) |
| padctl->ulpi = pad; |
| |
| if (strcmp(soc->name, "hsic") == 0) |
| padctl->hsic = pad; |
| |
| return pad; |
| } |
| |
| static void __tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl) |
| { |
| struct tegra_xusb_pad *pad, *tmp; |
| |
| list_for_each_entry_safe_reverse(pad, tmp, &padctl->pads, list) { |
| list_del(&pad->list); |
| tegra_xusb_pad_unregister(pad); |
| } |
| } |
| |
| static void tegra_xusb_remove_pads(struct tegra_xusb_padctl *padctl) |
| { |
| mutex_lock(&padctl->lock); |
| __tegra_xusb_remove_pads(padctl); |
| mutex_unlock(&padctl->lock); |
| } |
| |
| static void tegra_xusb_lane_program(struct tegra_xusb_lane *lane) |
| { |
| struct tegra_xusb_padctl *padctl = lane->pad->padctl; |
| const struct tegra_xusb_lane_soc *soc = lane->soc; |
| u32 value; |
| |
| /* skip single function lanes */ |
| if (soc->num_funcs < 2) |
| return; |
| |
| /* choose function */ |
| value = padctl_readl(padctl, soc->offset); |
| value &= ~(soc->mask << soc->shift); |
| value |= lane->function << soc->shift; |
| padctl_writel(padctl, value, soc->offset); |
| } |
| |
| static void tegra_xusb_pad_program(struct tegra_xusb_pad *pad) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < pad->soc->num_lanes; i++) { |
| struct tegra_xusb_lane *lane; |
| |
| if (pad->lanes[i]) { |
| lane = phy_get_drvdata(pad->lanes[i]); |
| tegra_xusb_lane_program(lane); |
| } |
| } |
| } |
| |
| static int tegra_xusb_setup_pads(struct tegra_xusb_padctl *padctl) |
| { |
| struct tegra_xusb_pad *pad; |
| unsigned int i; |
| |
| mutex_lock(&padctl->lock); |
| |
| for (i = 0; i < padctl->soc->num_pads; i++) { |
| const struct tegra_xusb_pad_soc *soc = padctl->soc->pads[i]; |
| int err; |
| |
| pad = tegra_xusb_pad_create(padctl, soc); |
| if (IS_ERR(pad)) { |
| err = PTR_ERR(pad); |
| dev_err(padctl->dev, "failed to create pad %s: %d\n", |
| soc->name, err); |
| __tegra_xusb_remove_pads(padctl); |
| mutex_unlock(&padctl->lock); |
| return err; |
| } |
| |
| if (!pad) |
| continue; |
| |
| list_add_tail(&pad->list, &padctl->pads); |
| } |
| |
| list_for_each_entry(pad, &padctl->pads, list) |
| tegra_xusb_pad_program(pad); |
| |
| mutex_unlock(&padctl->lock); |
| return 0; |
| } |
| |
| static bool tegra_xusb_lane_check(struct tegra_xusb_lane *lane, |
| const char *function) |
| { |
| const char *func = lane->soc->funcs[lane->function]; |
| |
| return strcmp(function, func) == 0; |
| } |
| |
| struct tegra_xusb_lane *tegra_xusb_find_lane(struct tegra_xusb_padctl *padctl, |
| const char *type, |
| unsigned int index) |
| { |
| struct tegra_xusb_lane *lane, *hit = ERR_PTR(-ENODEV); |
| char *name; |
| |
| name = kasprintf(GFP_KERNEL, "%s-%u", type, index); |
| if (!name) |
| return ERR_PTR(-ENOMEM); |
| |
| list_for_each_entry(lane, &padctl->lanes, list) { |
| if (strcmp(lane->soc->name, name) == 0) { |
| hit = lane; |
| break; |
| } |
| } |
| |
| kfree(name); |
| return hit; |
| } |
| |
| struct tegra_xusb_lane * |
| tegra_xusb_port_find_lane(struct tegra_xusb_port *port, |
| const struct tegra_xusb_lane_map *map, |
| const char *function) |
| { |
| struct tegra_xusb_lane *lane, *match = ERR_PTR(-ENODEV); |
| |
| for (; map->type; map++) { |
| if (port->index != map->port) |
| continue; |
| |
| lane = tegra_xusb_find_lane(port->padctl, map->type, |
| map->index); |
| 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 |
| match = lane; |
| } |
| |
| return match; |
| } |
| |
| static struct device_node * |
| tegra_xusb_find_port_node(struct tegra_xusb_padctl *padctl, const char *type, |
| unsigned int index) |
| { |
| struct device_node *ports, *np; |
| char *name; |
| |
| ports = of_get_child_by_name(padctl->dev->of_node, "ports"); |
| if (!ports) |
| return NULL; |
| |
| 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 * |
| tegra_xusb_find_port(struct tegra_xusb_padctl *padctl, const char *type, |
| unsigned int index) |
| { |
| struct tegra_xusb_port *port; |
| struct device_node *np; |
| |
| 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; |
| |
| 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) |
| { |
| } |
| |
| static 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) |
| { |
| 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 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>"); |
| MODULE_DESCRIPTION("Tegra XUSB Pad Controller driver"); |
| MODULE_LICENSE("GPL v2"); |