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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/usb/host/ohci-platform.c
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/usb/host/ohci-platform.c')
-rw-r--r--drivers/usb/host/ohci-platform.c381
1 files changed, 381 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-platform.c b/drivers/usb/host/ohci-platform.c
new file mode 100644
index 000000000..a84305091
--- /dev/null
+++ b/drivers/usb/host/ohci-platform.c
@@ -0,0 +1,381 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Generic platform ohci driver
+ *
+ * Copyright 2007 Michael Buesch <m@bues.ch>
+ * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
+ * Copyright 2014 Hans de Goede <hdegoede@redhat.com>
+ *
+ * Derived from the OCHI-SSB driver
+ * Derived from the OHCI-PCI driver
+ * Copyright 1999 Roman Weissgaerber
+ * Copyright 2000-2002 David Brownell
+ * Copyright 1999 Linus Torvalds
+ * Copyright 1999 Gregory P. Smith
+ */
+
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/hrtimer.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/usb/ohci_pdriver.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/usb/of.h>
+
+#include "ohci.h"
+
+#define DRIVER_DESC "OHCI generic platform driver"
+#define OHCI_MAX_CLKS 3
+#define hcd_to_ohci_priv(h) ((struct ohci_platform_priv *)hcd_to_ohci(h)->priv)
+
+struct ohci_platform_priv {
+ struct clk *clks[OHCI_MAX_CLKS];
+ struct reset_control *resets;
+};
+
+static int ohci_platform_power_on(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
+ int clk, ret;
+
+ for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++) {
+ ret = clk_prepare_enable(priv->clks[clk]);
+ if (ret)
+ goto err_disable_clks;
+ }
+
+ return 0;
+
+err_disable_clks:
+ while (--clk >= 0)
+ clk_disable_unprepare(priv->clks[clk]);
+
+ return ret;
+}
+
+static void ohci_platform_power_off(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
+ int clk;
+
+ for (clk = OHCI_MAX_CLKS - 1; clk >= 0; clk--)
+ if (priv->clks[clk])
+ clk_disable_unprepare(priv->clks[clk]);
+}
+
+static struct hc_driver __read_mostly ohci_platform_hc_driver;
+
+static const struct ohci_driver_overrides platform_overrides __initconst = {
+ .product_desc = "Generic Platform OHCI controller",
+ .extra_priv_size = sizeof(struct ohci_platform_priv),
+};
+
+static struct usb_ohci_pdata ohci_platform_defaults = {
+ .power_on = ohci_platform_power_on,
+ .power_suspend = ohci_platform_power_off,
+ .power_off = ohci_platform_power_off,
+};
+
+static int ohci_platform_probe(struct platform_device *dev)
+{
+ struct usb_hcd *hcd;
+ struct resource *res_mem;
+ struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
+ struct ohci_platform_priv *priv;
+ struct ohci_hcd *ohci;
+ int err, irq, clk = 0;
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ /*
+ * Use reasonable defaults so platforms don't have to provide these
+ * with DT probing on ARM.
+ */
+ if (!pdata)
+ pdata = &ohci_platform_defaults;
+
+ err = dma_coerce_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
+ if (err)
+ return err;
+
+ irq = platform_get_irq(dev, 0);
+ if (irq < 0)
+ return irq;
+
+ hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
+ dev_name(&dev->dev));
+ if (!hcd)
+ return -ENOMEM;
+
+ platform_set_drvdata(dev, hcd);
+ dev->dev.platform_data = pdata;
+ priv = hcd_to_ohci_priv(hcd);
+ ohci = hcd_to_ohci(hcd);
+
+ if (pdata == &ohci_platform_defaults && dev->dev.of_node) {
+ if (of_property_read_bool(dev->dev.of_node, "big-endian-regs"))
+ ohci->flags |= OHCI_QUIRK_BE_MMIO;
+
+ if (of_property_read_bool(dev->dev.of_node, "big-endian-desc"))
+ ohci->flags |= OHCI_QUIRK_BE_DESC;
+
+ if (of_property_read_bool(dev->dev.of_node, "big-endian"))
+ ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC;
+
+ if (of_property_read_bool(dev->dev.of_node, "no-big-frame-no"))
+ ohci->flags |= OHCI_QUIRK_FRAME_NO;
+
+ if (of_property_read_bool(dev->dev.of_node,
+ "remote-wakeup-connected"))
+ ohci->hc_control = OHCI_CTRL_RWC;
+
+ of_property_read_u32(dev->dev.of_node, "num-ports",
+ &ohci->num_ports);
+
+ for (clk = 0; clk < OHCI_MAX_CLKS; clk++) {
+ priv->clks[clk] = of_clk_get(dev->dev.of_node, clk);
+ if (IS_ERR(priv->clks[clk])) {
+ err = PTR_ERR(priv->clks[clk]);
+ if (err == -EPROBE_DEFER)
+ goto err_put_clks;
+ priv->clks[clk] = NULL;
+ break;
+ }
+ }
+
+ priv->resets = devm_reset_control_array_get_optional_shared(
+ &dev->dev);
+ if (IS_ERR(priv->resets)) {
+ err = PTR_ERR(priv->resets);
+ goto err_put_clks;
+ }
+
+ err = reset_control_deassert(priv->resets);
+ if (err)
+ goto err_put_clks;
+ }
+
+ if (pdata->big_endian_desc)
+ ohci->flags |= OHCI_QUIRK_BE_DESC;
+ if (pdata->big_endian_mmio)
+ ohci->flags |= OHCI_QUIRK_BE_MMIO;
+ if (pdata->no_big_frame_no)
+ ohci->flags |= OHCI_QUIRK_FRAME_NO;
+ if (pdata->num_ports)
+ ohci->num_ports = pdata->num_ports;
+
+#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_MMIO
+ if (ohci->flags & OHCI_QUIRK_BE_MMIO) {
+ dev_err(&dev->dev,
+ "Error: CONFIG_USB_OHCI_BIG_ENDIAN_MMIO not set\n");
+ err = -EINVAL;
+ goto err_reset;
+ }
+#endif
+#ifndef CONFIG_USB_OHCI_BIG_ENDIAN_DESC
+ if (ohci->flags & OHCI_QUIRK_BE_DESC) {
+ dev_err(&dev->dev,
+ "Error: CONFIG_USB_OHCI_BIG_ENDIAN_DESC not set\n");
+ err = -EINVAL;
+ goto err_reset;
+ }
+#endif
+
+ pm_runtime_set_active(&dev->dev);
+ pm_runtime_enable(&dev->dev);
+ if (pdata->power_on) {
+ err = pdata->power_on(dev);
+ if (err < 0)
+ goto err_reset;
+ }
+
+ res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
+ if (IS_ERR(hcd->regs)) {
+ err = PTR_ERR(hcd->regs);
+ goto err_power;
+ }
+ hcd->rsrc_start = res_mem->start;
+ hcd->rsrc_len = resource_size(res_mem);
+
+ hcd->tpl_support = of_usb_host_tpl_support(dev->dev.of_node);
+
+ err = usb_add_hcd(hcd, irq, IRQF_SHARED);
+ if (err)
+ goto err_power;
+
+ device_wakeup_enable(hcd->self.controller);
+
+ platform_set_drvdata(dev, hcd);
+
+ return err;
+
+err_power:
+ if (pdata->power_off)
+ pdata->power_off(dev);
+err_reset:
+ pm_runtime_disable(&dev->dev);
+ reset_control_assert(priv->resets);
+err_put_clks:
+ while (--clk >= 0)
+ clk_put(priv->clks[clk]);
+
+ if (pdata == &ohci_platform_defaults)
+ dev->dev.platform_data = NULL;
+
+ usb_put_hcd(hcd);
+
+ return err;
+}
+
+static int ohci_platform_remove(struct platform_device *dev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(dev);
+ struct usb_ohci_pdata *pdata = dev_get_platdata(&dev->dev);
+ struct ohci_platform_priv *priv = hcd_to_ohci_priv(hcd);
+ int clk;
+
+ pm_runtime_get_sync(&dev->dev);
+ usb_remove_hcd(hcd);
+
+ if (pdata->power_off)
+ pdata->power_off(dev);
+
+ reset_control_assert(priv->resets);
+
+ for (clk = 0; clk < OHCI_MAX_CLKS && priv->clks[clk]; clk++)
+ clk_put(priv->clks[clk]);
+
+ usb_put_hcd(hcd);
+
+ pm_runtime_put_sync(&dev->dev);
+ pm_runtime_disable(&dev->dev);
+
+ if (pdata == &ohci_platform_defaults)
+ dev->dev.platform_data = NULL;
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int ohci_platform_suspend(struct device *dev)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct usb_ohci_pdata *pdata = dev->platform_data;
+ struct platform_device *pdev = to_platform_device(dev);
+ bool do_wakeup = device_may_wakeup(dev);
+ int ret;
+
+ ret = ohci_suspend(hcd, do_wakeup);
+ if (ret)
+ return ret;
+
+ if (pdata->power_suspend)
+ pdata->power_suspend(pdev);
+
+ return ret;
+}
+
+static int ohci_platform_resume_common(struct device *dev, bool hibernated)
+{
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct usb_ohci_pdata *pdata = dev_get_platdata(dev);
+ struct platform_device *pdev = to_platform_device(dev);
+
+ if (pdata->power_on) {
+ int err = pdata->power_on(pdev);
+ if (err < 0)
+ return err;
+ }
+
+ ohci_resume(hcd, hibernated);
+
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ return 0;
+}
+
+static int ohci_platform_resume(struct device *dev)
+{
+ return ohci_platform_resume_common(dev, false);
+}
+
+static int ohci_platform_restore(struct device *dev)
+{
+ return ohci_platform_resume_common(dev, true);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct of_device_id ohci_platform_ids[] = {
+ { .compatible = "generic-ohci", },
+ { .compatible = "cavium,octeon-6335-ohci", },
+ { .compatible = "ti,ohci-omap3", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ohci_platform_ids);
+
+static const struct platform_device_id ohci_platform_table[] = {
+ { "ohci-platform", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(platform, ohci_platform_table);
+
+#ifdef CONFIG_PM_SLEEP
+static const struct dev_pm_ops ohci_platform_pm_ops = {
+ .suspend = ohci_platform_suspend,
+ .resume = ohci_platform_resume,
+ .freeze = ohci_platform_suspend,
+ .thaw = ohci_platform_resume,
+ .poweroff = ohci_platform_suspend,
+ .restore = ohci_platform_restore,
+};
+#endif
+
+static struct platform_driver ohci_platform_driver = {
+ .id_table = ohci_platform_table,
+ .probe = ohci_platform_probe,
+ .remove = ohci_platform_remove,
+ .shutdown = usb_hcd_platform_shutdown,
+ .driver = {
+ .name = "ohci-platform",
+#ifdef CONFIG_PM_SLEEP
+ .pm = &ohci_platform_pm_ops,
+#endif
+ .of_match_table = ohci_platform_ids,
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
+ }
+};
+
+static int __init ohci_platform_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
+
+ ohci_init_driver(&ohci_platform_hc_driver, &platform_overrides);
+ return platform_driver_register(&ohci_platform_driver);
+}
+module_init(ohci_platform_init);
+
+static void __exit ohci_platform_cleanup(void)
+{
+ platform_driver_unregister(&ohci_platform_driver);
+}
+module_exit(ohci_platform_cleanup);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Hauke Mehrtens");
+MODULE_AUTHOR("Alan Stern");
+MODULE_LICENSE("GPL");