--- /dev/null
+/*
+ * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
+ * Author: Chao Xie <chao.xie@marvell.com>
+ * Neil Zhang <zhangwm@marvell.com>
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/usb/otg.h>
+#include <linux/platform_data/mv_usb.h>
+
+#define CAPLENGTH_MASK (0xff)
+
+struct ehci_hcd_mv {
+ struct usb_hcd *hcd;
+
+ /* Which mode does this ehci running OTG/Host ? */
+ int mode;
+
+ void __iomem *phy_regs;
+ void __iomem *cap_regs;
+ void __iomem *op_regs;
+
+ struct usb_phy *otg;
+
+ struct mv_usb_platform_data *pdata;
+
+ struct clk *clk;
+};
+
+static void ehci_clock_enable(struct ehci_hcd_mv *ehci_mv)
+{
+ clk_prepare_enable(ehci_mv->clk);
+}
+
+static void ehci_clock_disable(struct ehci_hcd_mv *ehci_mv)
+{
+ clk_disable_unprepare(ehci_mv->clk);
+}
+
+static int mv_ehci_enable(struct ehci_hcd_mv *ehci_mv)
+{
+ int retval;
+
+ ehci_clock_enable(ehci_mv);
+ if (ehci_mv->pdata->phy_init) {
+ retval = ehci_mv->pdata->phy_init(ehci_mv->phy_regs);
+ if (retval)
+ return retval;
+ }
+
+ return 0;
+}
+
+static void mv_ehci_disable(struct ehci_hcd_mv *ehci_mv)
+{
+ if (ehci_mv->pdata->phy_deinit)
+ ehci_mv->pdata->phy_deinit(ehci_mv->phy_regs);
+ ehci_clock_disable(ehci_mv);
+}
+
+static int mv_ehci_reset(struct usb_hcd *hcd)
+{
+ struct device *dev = hcd->self.controller;
+ struct ehci_hcd_mv *ehci_mv = dev_get_drvdata(dev);
+ int retval;
+
+ if (ehci_mv == NULL) {
+ dev_err(dev, "Can not find private ehci data\n");
+ return -ENODEV;
+ }
+
+ hcd->has_tt = 1;
+
+ retval = ehci_setup(hcd);
+ if (retval)
+ dev_err(dev, "ehci_setup failed %d\n", retval);
+
+ return retval;
+}
+
+static const struct hc_driver mv_ehci_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "Marvell EHCI",
+ .hcd_priv_size = sizeof(struct ehci_hcd),
+
+ /*
+ * generic hardware linkage
+ */
+ .irq = ehci_irq,
+ .flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
+
+ /*
+ * basic lifecycle operations
+ */
+ .reset = mv_ehci_reset,
+ .start = ehci_run,
+ .stop = ehci_stop,
+ .shutdown = ehci_shutdown,
+
+ /*
+ * managing i/o requests and associated device resources
+ */
+ .urb_enqueue = ehci_urb_enqueue,
+ .urb_dequeue = ehci_urb_dequeue,
+ .endpoint_disable = ehci_endpoint_disable,
+ .endpoint_reset = ehci_endpoint_reset,
+ .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+
+ /*
+ * scheduling support
+ */
+ .get_frame_number = ehci_get_frame,
+
+ /*
+ * root hub support
+ */
+ .hub_status_data = ehci_hub_status_data,
+ .hub_control = ehci_hub_control,
+ .bus_suspend = ehci_bus_suspend,
+ .bus_resume = ehci_bus_resume,
+};
+
+static int mv_ehci_probe(struct platform_device *pdev)
+{
+ struct mv_usb_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct usb_hcd *hcd;
+ struct ehci_hcd *ehci;
+ struct ehci_hcd_mv *ehci_mv;
+ struct resource *r;
+ int retval = -ENODEV;
+ u32 offset;
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "missing platform_data\n");
+ return -ENODEV;
+ }
+
+ if (usb_disabled())
+ return -ENODEV;
+
+ hcd = usb_create_hcd(&mv_ehci_hc_driver, &pdev->dev, "mv ehci");
+ if (!hcd)
+ return -ENOMEM;
+
+ ehci_mv = devm_kzalloc(&pdev->dev, sizeof(*ehci_mv), GFP_KERNEL);
+ if (ehci_mv == NULL) {
+ retval = -ENOMEM;
+ goto err_put_hcd;
+ }
+
+ platform_set_drvdata(pdev, ehci_mv);
+ ehci_mv->pdata = pdata;
+ ehci_mv->hcd = hcd;
+
+ ehci_mv->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(ehci_mv->clk)) {
+ dev_err(&pdev->dev, "error getting clock\n");
+ retval = PTR_ERR(ehci_mv->clk);
+ goto err_put_hcd;
+ }
+
+ r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phyregs");
+ ehci_mv->phy_regs = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(ehci_mv->phy_regs)) {
+ retval = PTR_ERR(ehci_mv->phy_regs);
+ goto err_put_hcd;
+ }
+
+ r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "capregs");
+ ehci_mv->cap_regs = devm_ioremap_resource(&pdev->dev, r);
+ if (IS_ERR(ehci_mv->cap_regs)) {
+ retval = PTR_ERR(ehci_mv->cap_regs);
+ goto err_put_hcd;
+ }
+
+ retval = mv_ehci_enable(ehci_mv);
+ if (retval) {
+ dev_err(&pdev->dev, "init phy error %d\n", retval);
+ goto err_put_hcd;
+ }
+
+ offset = readl(ehci_mv->cap_regs) & CAPLENGTH_MASK;
+ ehci_mv->op_regs =
+ (void __iomem *) ((unsigned long) ehci_mv->cap_regs + offset);
+
+ hcd->rsrc_start = r->start;
+ hcd->rsrc_len = resource_size(r);
+ hcd->regs = ehci_mv->op_regs;
+
+ hcd->irq = platform_get_irq(pdev, 0);
+ if (!hcd->irq) {
+ dev_err(&pdev->dev, "Cannot get irq.");
+ retval = -ENODEV;
+ goto err_disable_clk;
+ }
+
+ ehci = hcd_to_ehci(hcd);
+ ehci->caps = (struct ehci_caps *) ehci_mv->cap_regs;
+
+ ehci_mv->mode = pdata->mode;
+ if (ehci_mv->mode == MV_USB_MODE_OTG) {
+ ehci_mv->otg = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
+ if (IS_ERR(ehci_mv->otg)) {
+ retval = PTR_ERR(ehci_mv->otg);
+
+ if (retval == -ENXIO)
+ dev_info(&pdev->dev, "MV_USB_MODE_OTG "
+ "must have CONFIG_USB_PHY enabled\n");
+ else
+ dev_err(&pdev->dev,
+ "unable to find transceiver\n");
+ goto err_disable_clk;
+ }
+
+ retval = otg_set_host(ehci_mv->otg->otg, &hcd->self);
+ if (retval < 0) {
+ dev_err(&pdev->dev,
+ "unable to register with transceiver\n");
+ retval = -ENODEV;
+ goto err_disable_clk;
+ }
+ /* otg will enable clock before use as host */
+ mv_ehci_disable(ehci_mv);
+ } else {
+ if (pdata->set_vbus)
+ pdata->set_vbus(1);
+
+ retval = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
+ if (retval) {
+ dev_err(&pdev->dev,
+ "failed to add hcd with err %d\n", retval);
+ goto err_set_vbus;
+ }
+ device_wakeup_enable(hcd->self.controller);
+ }
+
+ if (pdata->private_init)
+ pdata->private_init(ehci_mv->op_regs, ehci_mv->phy_regs);
+
+ dev_info(&pdev->dev,
+ "successful find EHCI device with regs 0x%p irq %d"
+ " working in %s mode\n", hcd->regs, hcd->irq,
+ ehci_mv->mode == MV_USB_MODE_OTG ? "OTG" : "Host");
+
+ return 0;
+
+err_set_vbus:
+ if (pdata->set_vbus)
+ pdata->set_vbus(0);
+err_disable_clk:
+ mv_ehci_disable(ehci_mv);
+err_put_hcd:
+ usb_put_hcd(hcd);
+
+ return retval;
+}
+
+static int mv_ehci_remove(struct platform_device *pdev)
+{
+ struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
+ struct usb_hcd *hcd = ehci_mv->hcd;
+
+ if (hcd->rh_registered)
+ usb_remove_hcd(hcd);
+
+ if (!IS_ERR_OR_NULL(ehci_mv->otg))
+ otg_set_host(ehci_mv->otg->otg, NULL);
+
+ if (ehci_mv->mode == MV_USB_MODE_HOST) {
+ if (ehci_mv->pdata->set_vbus)
+ ehci_mv->pdata->set_vbus(0);
+
+ mv_ehci_disable(ehci_mv);
+ }
+
+ usb_put_hcd(hcd);
+
+ return 0;
+}
+
+MODULE_ALIAS("mv-ehci");
+
+static const struct platform_device_id ehci_id_table[] = {
+ {"pxa-u2oehci", PXA_U2OEHCI},
+ {"pxa-sph", PXA_SPH},
+ {"mmp3-hsic", MMP3_HSIC},
+ {"mmp3-fsic", MMP3_FSIC},
+ {},
+};
+
+static void mv_ehci_shutdown(struct platform_device *pdev)
+{
+ struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
+ struct usb_hcd *hcd = ehci_mv->hcd;
+
+ if (!hcd->rh_registered)
+ return;
+
+ if (hcd->driver->shutdown)
+ hcd->driver->shutdown(hcd);
+}
+
+static struct platform_driver ehci_mv_driver = {
+ .probe = mv_ehci_probe,
+ .remove = mv_ehci_remove,
+ .shutdown = mv_ehci_shutdown,
+ .driver = {
+ .name = "mv-ehci",
+ .bus = &platform_bus_type,
+ },
+ .id_table = ehci_id_table,
+};
Code Review / kvmfornfv.git / blobdiff