--- /dev/null
+/*
+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/regulator/consumer.h>
+
+struct jz4740_ohci_hcd {
+ struct ohci_hcd ohci_hcd;
+
+ struct regulator *vbus;
+ bool vbus_enabled;
+ struct clk *clk;
+};
+
+static inline struct jz4740_ohci_hcd *hcd_to_jz4740_hcd(struct usb_hcd *hcd)
+{
+ return (struct jz4740_ohci_hcd *)(hcd->hcd_priv);
+}
+
+static inline struct usb_hcd *jz4740_hcd_to_hcd(struct jz4740_ohci_hcd *jz4740_ohci)
+{
+ return container_of((void *)jz4740_ohci, struct usb_hcd, hcd_priv);
+}
+
+static int ohci_jz4740_start(struct usb_hcd *hcd)
+{
+ struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+ int ret;
+
+ ret = ohci_init(ohci);
+ if (ret < 0)
+ return ret;
+
+ ohci->num_ports = 1;
+
+ ret = ohci_run(ohci);
+ if (ret < 0) {
+ dev_err(hcd->self.controller, "Can not start %s",
+ hcd->self.bus_name);
+ ohci_stop(hcd);
+ return ret;
+ }
+ return 0;
+}
+
+static int ohci_jz4740_set_vbus_power(struct jz4740_ohci_hcd *jz4740_ohci,
+ bool enabled)
+{
+ int ret = 0;
+
+ if (!jz4740_ohci->vbus)
+ return 0;
+
+ if (enabled && !jz4740_ohci->vbus_enabled) {
+ ret = regulator_enable(jz4740_ohci->vbus);
+ if (ret)
+ dev_err(jz4740_hcd_to_hcd(jz4740_ohci)->self.controller,
+ "Could not power vbus\n");
+ } else if (!enabled && jz4740_ohci->vbus_enabled) {
+ ret = regulator_disable(jz4740_ohci->vbus);
+ }
+
+ if (ret == 0)
+ jz4740_ohci->vbus_enabled = enabled;
+
+ return ret;
+}
+
+static int ohci_jz4740_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
+ u16 wIndex, char *buf, u16 wLength)
+{
+ struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
+ int ret = 0;
+
+ switch (typeReq) {
+ case SetPortFeature:
+ if (wValue == USB_PORT_FEAT_POWER)
+ ret = ohci_jz4740_set_vbus_power(jz4740_ohci, true);
+ break;
+ case ClearPortFeature:
+ if (wValue == USB_PORT_FEAT_POWER)
+ ret = ohci_jz4740_set_vbus_power(jz4740_ohci, false);
+ break;
+ }
+
+ if (ret)
+ return ret;
+
+ return ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
+}
+
+
+static const struct hc_driver ohci_jz4740_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "JZ4740 OHCI",
+ .hcd_priv_size = sizeof(struct jz4740_ohci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ohci_irq,
+ .flags = HCD_USB11 | HCD_MEMORY,
+
+ /*
+ * basic lifecycle operations
+ */
+ .start = ohci_jz4740_start,
+ .stop = ohci_stop,
+ .shutdown = ohci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ohci_urb_enqueue,
+ .urb_dequeue = ohci_urb_dequeue,
+ .endpoint_disable = ohci_endpoint_disable,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ohci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ohci_hub_status_data,
+ .hub_control = ohci_jz4740_hub_control,
+#ifdef CONFIG_PM
+ .bus_suspend = ohci_bus_suspend,
+ .bus_resume = ohci_bus_resume,
+#endif
+ .start_port_reset = ohci_start_port_reset,
+};
+
+
+static int jz4740_ohci_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct usb_hcd *hcd;
+ struct jz4740_ohci_hcd *jz4740_ohci;
+ struct resource *res;
+ int irq;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "Failed to get platform irq\n");
+ return irq;
+ }
+
+ hcd = usb_create_hcd(&ohci_jz4740_hc_driver, &pdev->dev, "jz4740");
+ if (!hcd) {
+ dev_err(&pdev->dev, "Failed to create hcd.\n");
+ return -ENOMEM;
+ }
+
+ jz4740_ohci = hcd_to_jz4740_hcd(hcd);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hcd->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hcd->regs)) {
+ ret = PTR_ERR(hcd->regs);
+ goto err_free;
+ }
+ hcd->rsrc_start = res->start;
+ hcd->rsrc_len = resource_size(res);
+
+ jz4740_ohci->clk = devm_clk_get(&pdev->dev, "uhc");
+ if (IS_ERR(jz4740_ohci->clk)) {
+ ret = PTR_ERR(jz4740_ohci->clk);
+ dev_err(&pdev->dev, "Failed to get clock: %d\n", ret);
+ goto err_free;
+ }
+
+ jz4740_ohci->vbus = devm_regulator_get(&pdev->dev, "vbus");
+ if (IS_ERR(jz4740_ohci->vbus))
+ jz4740_ohci->vbus = NULL;
+
+
+ clk_set_rate(jz4740_ohci->clk, 48000000);
+ clk_enable(jz4740_ohci->clk);
+ if (jz4740_ohci->vbus)
+ ohci_jz4740_set_vbus_power(jz4740_ohci, true);
+
+ platform_set_drvdata(pdev, hcd);
+
+ ohci_hcd_init(hcd_to_ohci(hcd));
+
+ ret = usb_add_hcd(hcd, irq, 0);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to add hcd: %d\n", ret);
+ goto err_disable;
+ }
+ device_wakeup_enable(hcd->self.controller);
+
+ return 0;
+
+err_disable:
+ if (jz4740_ohci->vbus)
+ regulator_disable(jz4740_ohci->vbus);
+ clk_disable(jz4740_ohci->clk);
+
+err_free:
+ usb_put_hcd(hcd);
+
+ return ret;
+}
+
+static int jz4740_ohci_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+ struct jz4740_ohci_hcd *jz4740_ohci = hcd_to_jz4740_hcd(hcd);
+
+ usb_remove_hcd(hcd);
+
+ if (jz4740_ohci->vbus)
+ regulator_disable(jz4740_ohci->vbus);
+
+ clk_disable(jz4740_ohci->clk);
+
+ usb_put_hcd(hcd);
+
+ return 0;
+}
+
+static struct platform_driver ohci_hcd_jz4740_driver = {
+ .probe = jz4740_ohci_probe,
+ .remove = jz4740_ohci_remove,
+ .driver = {
+ .name = "jz4740-ohci",
+ },
+};
+
+MODULE_ALIAS("platform:jz4740-ohci");
Code Review / kvmfornfv.git / blobdiff