Merge branch 'linus'

1 files changed, 366 insertions, 0 deletions

diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
new file mode 100644
index 000000000000..f985f121a245
--- /dev/null
+++ b/drivers/usb/host/ehci-fsl.c
@@ -0,0 +1,366 @@
+/*
+ * (C) Copyright David Brownell 2000-2002
+ * Copyright (c) 2005 MontaVista Software
+ *
+ * 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.
+ *
+ * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided
+ * by Hunter Wu.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/fsl_devices.h>
+
+#include "ehci-fsl.h"
+
+/* FIXME: Power Managment is un-ported so temporarily disable it */
+#undef CONFIG_PM
+
+/* PCI-based HCs are common, but plenty of non-PCI HCs are used too */
+
+/* configure so an HC device and id are always provided */
+/* always called with process context; sleeping is OK */
+
+/**
+ * usb_hcd_fsl_probe - initialize FSL-based HCDs
+ * @drvier: Driver to be used for this HCD
+ * @pdev: USB Host Controller being probed
+ * Context: !in_interrupt()
+ *
+ * Allocates basic resources for this USB host controller.
+ *
+ */
+int usb_hcd_fsl_probe(const struct hc_driver *driver,
+                      struct platform_device *pdev)
+{
+        struct fsl_usb2_platform_data *pdata;
+        struct usb_hcd *hcd;
+        struct resource *res;
+        int irq;
+        int retval;
+        unsigned int temp;
+
+        pr_debug("initializing FSL-SOC USB Controller\n");
+
+        /* Need platform data for setup */
+        pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data;
+        if (!pdata) {
+                dev_err(&pdev->dev,
+                        "No platform data for %s.\n", pdev->dev.bus_id);
+                return -ENODEV;
+        }
+
+        /*
+         * This is a host mode driver, verify that we're supposed to be
+         * in host mode.
+         */
+        if (!((pdata->operating_mode == FSL_USB2_DR_HOST) ||
+              (pdata->operating_mode == FSL_USB2_MPH_HOST))) {
+                dev_err(&pdev->dev,
+                        "Non Host Mode configured for %s. Wrong driver linked.\n",
+                        pdev->dev.bus_id);
+                return -ENODEV;
+        }
+
+        res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+        if (!res) {
+                dev_err(&pdev->dev,
+                        "Found HC with no IRQ. Check %s setup!\n",
+                        pdev->dev.bus_id);
+                return -ENODEV;
+        }
+        irq = res->start;
+
+        hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
+        if (!hcd) {
+                retval = -ENOMEM;
+                goto err1;
+        }
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                dev_err(&pdev->dev,
+                        "Found HC with no register addr. Check %s setup!\n",
+                        pdev->dev.bus_id);
+                retval = -ENODEV;
+                goto err2;
+        }
+        hcd->rsrc_start = res->start;
+        hcd->rsrc_len = res->end - res->start + 1;
+        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
+                                driver->description)) {
+                dev_dbg(&pdev->dev, "controller already in use\n");
+                retval = -EBUSY;
+                goto err2;
+        }
+        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+
+        if (hcd->regs == NULL) {
+                dev_dbg(&pdev->dev, "error mapping memory\n");
+                retval = -EFAULT;
+                goto err3;
+        }
+
+        /* Enable USB controller */
+        temp = in_be32(hcd->regs + 0x500);
+        out_be32(hcd->regs + 0x500, temp | 0x4);
+
+        /* Set to Host mode */
+        temp = in_le32(hcd->regs + 0x1a8);
+        out_le32(hcd->regs + 0x1a8, temp | 0x3);
+
+        retval = usb_add_hcd(hcd, irq, SA_SHIRQ);
+        if (retval != 0)
+                goto err4;
+        return retval;
+
+      err4:
+        iounmap(hcd->regs);
+      err3:
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+      err2:
+        usb_put_hcd(hcd);
+      err1:
+        dev_err(&pdev->dev, "init %s fail, %d\n", pdev->dev.bus_id, retval);
+        return retval;
+}
+
+/* may be called without controller electrically present */
+/* may be called with controller, bus, and devices active */
+
+/**
+ * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs
+ * @dev: USB Host Controller being removed
+ * Context: !in_interrupt()
+ *
+ * Reverses the effect of usb_hcd_fsl_probe().
+ *
+ */
+void usb_hcd_fsl_remove(struct usb_hcd *hcd, struct platform_device *pdev)
+{
+        usb_remove_hcd(hcd);
+        iounmap(hcd->regs);
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+        usb_put_hcd(hcd);
+}
+
+static void mpc83xx_setup_phy(struct ehci_hcd *ehci,
+                              enum fsl_usb2_phy_modes phy_mode,
+                              unsigned int port_offset)
+{
+        u32 portsc = 0;
+        switch (phy_mode) {
+        case FSL_USB2_PHY_ULPI:
+                portsc |= PORT_PTS_ULPI;
+                break;
+        case FSL_USB2_PHY_SERIAL:
+                portsc |= PORT_PTS_SERIAL;
+                break;
+        case FSL_USB2_PHY_UTMI_WIDE:
+                portsc |= PORT_PTS_PTW;
+                /* fall through */
+        case FSL_USB2_PHY_UTMI:
+                portsc |= PORT_PTS_UTMI;
+                break;
+        case FSL_USB2_PHY_NONE:
+                break;
+        }
+        writel(portsc, &ehci->regs->port_status[port_offset]);
+}
+
+static void mpc83xx_usb_setup(struct usb_hcd *hcd)
+{
+        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+        struct fsl_usb2_platform_data *pdata;
+        void __iomem *non_ehci = hcd->regs;
+
+        pdata =
+            (struct fsl_usb2_platform_data *)hcd->self.controller->
+            platform_data;
+        /* Enable PHY interface in the control reg. */
+        out_be32(non_ehci + FSL_SOC_USB_CTRL, 0x00000004);
+        out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0000001b);
+
+        if (pdata->operating_mode == FSL_USB2_DR_HOST)
+                mpc83xx_setup_phy(ehci, pdata->phy_mode, 0);
+
+        if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
+                unsigned int chip, rev, svr;
+
+                svr = mfspr(SPRN_SVR);
+                chip = svr >> 16;
+                rev = (svr >> 4) & 0xf;
+
+                /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
+                if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
+                        ehci->has_fsl_port_bug = 1;
+
+                if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
+                        mpc83xx_setup_phy(ehci, pdata->phy_mode, 0);
+                if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
+                        mpc83xx_setup_phy(ehci, pdata->phy_mode, 1);
+        }
+
+        /* put controller in host mode. */
+        writel(0x00000003, non_ehci + FSL_SOC_USB_USBMODE);
+        out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c);
+        out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040);
+        out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001);
+}
+
+/* called after powerup, by probe or system-pm "wakeup" */
+static int ehci_fsl_reinit(struct ehci_hcd *ehci)
+{
+        mpc83xx_usb_setup(ehci_to_hcd(ehci));
+        ehci_port_power(ehci, 0);
+
+        return 0;
+}
+
+/* called during probe() after chip reset completes */
+static int ehci_fsl_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(readl(&ehci->caps->hc_capbase));
+        dbg_hcs_params(ehci, "reset");
+        dbg_hcc_params(ehci, "reset");
+
+        /* cache this readonly data; minimize chip reads */
+        ehci->hcs_params = readl(&ehci->caps->hcs_params);
+
+        retval = ehci_halt(ehci);
+        if (retval)
+                return retval;
+
+        /* data structure init */
+        retval = ehci_init(hcd);
+        if (retval)
+                return retval;
+
+        ehci->is_tdi_rh_tt = 1;
+
+        ehci->sbrn = 0x20;
+
+        ehci_reset(ehci);
+
+        retval = ehci_fsl_reinit(ehci);
+        return retval;
+}
+
+static const struct hc_driver ehci_fsl_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,
+
+        /*
+         * basic lifecycle operations
+         */
+        .reset = ehci_fsl_setup,
+        .start = ehci_run,
+#ifdef  CONFIG_PM
+        .suspend = ehci_bus_suspend,
+        .resume = ehci_bus_resume,
+#endif
+        .stop = ehci_stop,
+
+        /*
+         * 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,
+};
+
+static int ehci_fsl_drv_probe(struct platform_device *pdev)
+{
+        if (usb_disabled())
+                return -ENODEV;
+
+        return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev);
+}
+
+static int ehci_fsl_drv_remove(struct platform_device *pdev)
+{
+        struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+        usb_hcd_fsl_remove(hcd, pdev);
+
+        return 0;
+}
+
+static struct platform_driver ehci_fsl_dr_driver = {
+        .probe = ehci_fsl_drv_probe,
+        .remove = ehci_fsl_drv_remove,
+        .driver = {
+                   .name = "fsl-usb2-dr",
+                   },
+};
+
+static struct platform_driver ehci_fsl_mph_driver = {
+        .probe = ehci_fsl_drv_probe,
+        .remove = ehci_fsl_drv_remove,
+        .driver = {
+                   .name = "fsl-usb2-mph",
+                   },
+};
+
+static int __init ehci_fsl_init(void)
+{
+        int retval;
+
+        pr_debug("%s: block sizes: qh %Zd qtd %Zd itd %Zd sitd %Zd\n",
+                 hcd_name,
+                 sizeof(struct ehci_qh), sizeof(struct ehci_qtd),
+                 sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
+
+        retval = platform_driver_register(&ehci_fsl_dr_driver);
+        if (retval)
+                return retval;
+
+        return platform_driver_register(&ehci_fsl_mph_driver);
+}
+
+static void __exit ehci_fsl_cleanup(void)
+{
+        platform_driver_unregister(&ehci_fsl_mph_driver);
+        platform_driver_unregister(&ehci_fsl_dr_driver);
+}
+
+module_init(ehci_fsl_init);
+module_exit(ehci_fsl_cleanup);