+++ /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");
projects / kernel.git / commitdiff