1 files changed, 296 insertions, 0 deletions

diff --git a/drivers/usb/host/ehci-mxc.c b/drivers/usb/host/ehci-mxc.c
new file mode 100644
index 000000000000..ead59f42e69b
--- /dev/null
+++ b/drivers/usb/host/ehci-mxc.c
@@ -0,0 +1,296 @@
+/*
+ * Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ * Copyright (c) 2009 Daniel Mack <daniel@caiaq.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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * 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/delay.h>
+#include <linux/usb/otg.h>
+#include <linux/slab.h>
+
+#include <mach/mxc_ehci.h>
+
+#define ULPI_VIEWPORT_OFFSET    0x170
+#define PORTSC_OFFSET           0x184
+#define USBMODE_OFFSET          0x1a8
+#define USBMODE_CM_HOST         3
+
+struct ehci_mxc_priv {
+        struct clk *usbclk, *ahbclk;
+        struct usb_hcd *hcd;
+};
+
+/* called during probe() after chip reset completes */
+static int ehci_mxc_setup(struct usb_hcd *hcd)
+{
+        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+        int retval;
+
+        /* EHCI registers start at offset 0x100 */
+        ehci->caps = hcd->regs + 0x100;
+        ehci->regs = hcd->regs + 0x100 +
+            HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+        dbg_hcs_params(ehci, "reset");
+        dbg_hcc_params(ehci, "reset");
+
+        /* cache this readonly data; minimize chip reads */
+        ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+
+        retval = ehci_halt(ehci);
+        if (retval)
+                return retval;
+
+        /* data structure init */
+        retval = ehci_init(hcd);
+        if (retval)
+                return retval;
+
+        hcd->has_tt = 1;
+
+        ehci->sbrn = 0x20;
+
+        ehci_reset(ehci);
+
+        ehci_port_power(ehci, 0);
+        return 0;
+}
+
+static const struct hc_driver ehci_mxc_hc_driver = {
+        .description = hcd_name,
+        .product_desc = "Freescale On-Chip EHCI Host Controller",
+        .hcd_priv_size = sizeof(struct ehci_hcd),
+
+        /*
+         * generic hardware linkage
+         */
+        .irq = ehci_irq,
+        .flags = HCD_USB2 | HCD_MEMORY,
+
+        /*
+         * basic lifecycle operations
+         */
+        .reset = ehci_mxc_setup,
+        .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,
+
+        /*
+         * 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,
+        .relinquish_port = ehci_relinquish_port,
+        .port_handed_over = ehci_port_handed_over,
+};
+
+static int ehci_mxc_drv_probe(struct platform_device *pdev)
+{
+        struct mxc_usbh_platform_data *pdata = pdev->dev.platform_data;
+        struct usb_hcd *hcd;
+        struct resource *res;
+        int irq, ret, temp;
+        struct ehci_mxc_priv *priv;
+        struct device *dev = &pdev->dev;
+
+        dev_info(&pdev->dev, "initializing i.MX USB Controller\n");
+
+        if (!pdata) {
+                dev_err(dev, "No platform data given, bailing out.\n");
+                return -EINVAL;
+        }
+
+        irq = platform_get_irq(pdev, 0);
+
+        hcd = usb_create_hcd(&ehci_mxc_hc_driver, dev, dev_name(dev));
+        if (!hcd)
+                return -ENOMEM;
+
+        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+        if (!priv) {
+                ret = -ENOMEM;
+                goto err_alloc;
+        }
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                dev_err(dev, "Found HC with no register addr. Check setup!\n");
+                ret = -ENODEV;
+                goto err_get_resource;
+        }
+
+        hcd->rsrc_start = res->start;
+        hcd->rsrc_len = resource_size(res);
+
+        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+                dev_dbg(dev, "controller already in use\n");
+                ret = -EBUSY;
+                goto err_request_mem;
+        }
+
+        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+        if (!hcd->regs) {
+                dev_err(dev, "error mapping memory\n");
+                ret = -EFAULT;
+                goto err_ioremap;
+        }
+
+        /* call platform specific init function */
+        if (pdata->init) {
+                ret = pdata->init(pdev);
+                if (ret) {
+                        dev_err(dev, "platform init failed\n");
+                        goto err_init;
+                }
+                /* platforms need some time to settle changed IO settings */
+                mdelay(10);
+        }
+
+        /* enable clocks */
+        priv->usbclk = clk_get(dev, "usb");
+        if (IS_ERR(priv->usbclk)) {
+                ret = PTR_ERR(priv->usbclk);
+                goto err_clk;
+        }
+        clk_enable(priv->usbclk);
+
+        if (!cpu_is_mx35()) {
+                priv->ahbclk = clk_get(dev, "usb_ahb");
+                if (IS_ERR(priv->ahbclk)) {
+                        ret = PTR_ERR(priv->ahbclk);
+                        goto err_clk_ahb;
+                }
+                clk_enable(priv->ahbclk);
+        }
+
+        /* set USBMODE to host mode */
+        temp = readl(hcd->regs + USBMODE_OFFSET);
+        writel(temp | USBMODE_CM_HOST, hcd->regs + USBMODE_OFFSET);
+
+        /* set up the PORTSCx register */
+        writel(pdata->portsc, hcd->regs + PORTSC_OFFSET);
+        mdelay(10);
+
+        /* setup USBCONTROL. */
+        ret = mxc_set_usbcontrol(pdev->id, pdata->flags);
+        if (ret < 0)
+                goto err_init;
+
+        /* Initialize the transceiver */
+        if (pdata->otg) {
+                pdata->otg->io_priv = hcd->regs + ULPI_VIEWPORT_OFFSET;
+                if (otg_init(pdata->otg) != 0)
+                        dev_err(dev, "unable to init transceiver\n");
+                else if (otg_set_vbus(pdata->otg, 1) != 0)
+                        dev_err(dev, "unable to enable vbus on transceiver\n");
+        }
+
+        priv->hcd = hcd;
+        platform_set_drvdata(pdev, priv);
+
+        ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
+        if (ret)
+                goto err_add;
+
+        return 0;
+
+err_add:
+        if (pdata && pdata->exit)
+                pdata->exit(pdev);
+err_init:
+        if (priv->ahbclk) {
+                clk_disable(priv->ahbclk);
+                clk_put(priv->ahbclk);
+        }
+err_clk_ahb:
+        clk_disable(priv->usbclk);
+        clk_put(priv->usbclk);
+err_clk:
+        iounmap(hcd->regs);
+err_ioremap:
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_request_mem:
+err_get_resource:
+        kfree(priv);
+err_alloc:
+        usb_put_hcd(hcd);
+        return ret;
+}
+
+static int __exit ehci_mxc_drv_remove(struct platform_device *pdev)
+{
+        struct mxc_usbh_platform_data *pdata = pdev->dev.platform_data;
+        struct ehci_mxc_priv *priv = platform_get_drvdata(pdev);
+        struct usb_hcd *hcd = priv->hcd;
+
+        if (pdata && pdata->exit)
+                pdata->exit(pdev);
+
+        if (pdata->otg)
+                otg_shutdown(pdata->otg);
+
+        usb_remove_hcd(hcd);
+        iounmap(hcd->regs);
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+        usb_put_hcd(hcd);
+        platform_set_drvdata(pdev, NULL);
+
+        clk_disable(priv->usbclk);
+        clk_put(priv->usbclk);
+        if (priv->ahbclk) {
+                clk_disable(priv->ahbclk);
+                clk_put(priv->ahbclk);
+        }
+
+        kfree(priv);
+
+        return 0;
+}
+
+static void ehci_mxc_drv_shutdown(struct platform_device *pdev)
+{
+        struct ehci_mxc_priv *priv = platform_get_drvdata(pdev);
+        struct usb_hcd *hcd = priv->hcd;
+
+        if (hcd->driver->shutdown)
+                hcd->driver->shutdown(hcd);
+}
+
+MODULE_ALIAS("platform:mxc-ehci");
+
+static struct platform_driver ehci_mxc_driver = {
+        .probe = ehci_mxc_drv_probe,
+        .remove = __exit_p(ehci_mxc_drv_remove),
+        .shutdown = ehci_mxc_drv_shutdown,
+        .driver = {
+                   .name = "mxc-ehci",
+        },
+};