USB: OHCI support for PNX8550

OHCI HCD (Host Controller Driver) for USB. Bus Glue for PNX8550.

Signed-off-by: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 258 insertions, 0 deletions

diff --git a/drivers/usb/host/ohci-pnx8550.c b/drivers/usb/host/ohci-pnx8550.c
new file mode 100644
index 000000000000..6922b91b1704
--- /dev/null
+++ b/drivers/usb/host/ohci-pnx8550.c
@@ -0,0 +1,258 @@
+/*
+ * OHCI HCD (Host Controller Driver) for USB.
+ *
+ * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
+ * (C) Copyright 2002 Hewlett-Packard Company
+ * (C) Copyright 2005 Embedded Alley Solutions, Inc.
+ *
+ * Bus Glue for PNX8550
+ *
+ * Written by Christopher Hoover <ch@hpl.hp.com>
+ * Based on fragments of previous driver by Russell King et al.
+ *
+ * Modified for LH7A404 from ohci-sa1111.c
+ *  by Durgesh Pattamatta <pattamattad@sharpsec.com>
+ *
+ * Modified for PNX8550 from ohci-sa1111.c and sa-omap.c
+ *  by Vitaly Wool <vitalywool@gmail.com>
+ *
+ * This file is licenced under the GPL.
+ */
+
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <asm/mach-pnx8550/usb.h>
+#include <asm/mach-pnx8550/int.h>
+#include <asm/mach-pnx8550/pci.h>
+
+#ifndef CONFIG_PNX8550
+#error "This file is PNX8550 bus glue.  CONFIG_PNX8550 must be defined."
+#endif
+
+extern int usb_disabled(void);
+
+/*-------------------------------------------------------------------------*/
+
+static void pnx8550_start_hc(struct platform_device *dev)
+{
+        /*
+         * Set register CLK48CTL to enable and 48MHz
+         */
+        outl(0x00000003, PCI_BASE | 0x0004770c);
+
+        /*
+         * Set register CLK12CTL to enable and 48MHz
+         */
+        outl(0x00000003, PCI_BASE | 0x00047710);
+
+        udelay(100);
+}
+
+static void pnx8550_stop_hc(struct platform_device *dev)
+{
+        udelay(10);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+/* configure so an HC device and id are always provided */
+/* always called with process context; sleeping is OK */
+
+
+/**
+ * usb_hcd_pnx8550_probe - initialize pnx8550-based HCDs
+ * Context: !in_interrupt()
+ *
+ * Allocates basic resources for this USB host controller, and
+ * then invokes the start() method for the HCD associated with it
+ * through the hotplug entry's driver_data.
+ *
+ */
+int usb_hcd_pnx8550_probe (const struct hc_driver *driver,
+                          struct platform_device *dev)
+{
+        int retval;
+        struct usb_hcd *hcd;
+
+        if (dev->resource[0].flags != IORESOURCE_MEM ||
+                        dev->resource[1].flags != IORESOURCE_IRQ) {
+                dev_err (&dev->dev,"invalid resource type\n");
+                return -ENOMEM;
+        }
+
+        hcd = usb_create_hcd (driver, &dev->dev, "pnx8550");
+        if (!hcd)
+                return -ENOMEM;
+        hcd->rsrc_start = dev->resource[0].start;
+        hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1;
+
+        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+                dev_err(&dev->dev, "request_mem_region [0x%08llx, 0x%08llx] "
+                                "failed\n", hcd->rsrc_start, hcd->rsrc_len);
+                retval = -EBUSY;
+                goto err1;
+        }
+
+        hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
+        if (!hcd->regs) {
+                dev_err(&dev->dev, "ioremap [[0x%08llx, 0x%08llx] failed\n",
+                                hcd->rsrc_start, hcd->rsrc_len);
+                retval = -ENOMEM;
+                goto err2;
+        }
+
+        pnx8550_start_hc(dev);
+
+        ohci_hcd_init(hcd_to_ohci(hcd));
+
+        retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT);
+        if (retval == 0)
+                return retval;
+
+        pnx8550_stop_hc(dev);
+        iounmap(hcd->regs);
+ err2:
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ err1:
+        usb_put_hcd(hcd);
+        return retval;
+}
+
+
+/* may be called without controller electrically present */
+/* may be called with controller, bus, and devices active */
+
+/**
+ * usb_hcd_pnx8550_remove - shutdown processing for pnx8550-based HCDs
+ * @dev: USB Host Controller being removed
+ * Context: !in_interrupt()
+ *
+ * Reverses the effect of usb_hcd_pnx8550_probe(), first invoking
+ * the HCD's stop() method.  It is always called from a thread
+ * context, normally "rmmod", "apmd", or something similar.
+ *
+ */
+void usb_hcd_pnx8550_remove (struct usb_hcd *hcd, struct platform_device *dev)
+{
+        usb_remove_hcd(hcd);
+        pnx8550_stop_hc(dev);
+        iounmap(hcd->regs);
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+        usb_put_hcd(hcd);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int __devinit
+ohci_pnx8550_start (struct usb_hcd *hcd)
+{
+        struct ohci_hcd *ohci = hcd_to_ohci (hcd);
+        int             ret;
+
+        ohci_dbg (ohci, "ohci_pnx8550_start, ohci:%p", ohci);
+
+        if ((ret = ohci_init(ohci)) < 0)
+                return ret;
+
+        if ((ret = ohci_run (ohci)) < 0) {
+                err ("can't start %s", hcd->self.bus_name);
+                ohci_stop (hcd);
+                return ret;
+        }
+
+        return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static const struct hc_driver ohci_pnx8550_hc_driver = {
+        .description =          hcd_name,
+        .product_desc =         "PNX8550 OHCI",
+        .hcd_priv_size =        sizeof(struct ohci_hcd),
+
+        /*
+         * generic hardware linkage
+         */
+        .irq =                  ohci_irq,
+        .flags =                HCD_USB11 | HCD_MEMORY,
+
+        /*
+         * basic lifecycle operations
+         */
+        .start =                ohci_pnx8550_start,
+        .stop =                 ohci_stop,
+
+        /*
+         * 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_hub_control,
+        .hub_irq_enable =       ohci_rhsc_enable,
+#ifdef  CONFIG_PM
+        .bus_suspend =          ohci_bus_suspend,
+        .bus_resume =           ohci_bus_resume,
+#endif
+        .start_port_reset =     ohci_start_port_reset,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int ohci_hcd_pnx8550_drv_probe(struct platform_device *pdev)
+{
+        int ret;
+
+        if (usb_disabled())
+                return -ENODEV;
+
+        ret = usb_hcd_pnx8550_probe(&ohci_pnx8550_hc_driver, pdev);
+        return ret;
+}
+
+static int ohci_hcd_pnx8550_drv_remove(struct platform_device *pdev)
+{
+        struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+        usb_hcd_pnx8550_remove(hcd, pdev);
+        return 0;
+}
+
+MODULE_ALIAS("pnx8550-ohci");
+
+static struct platform_driver ohci_hcd_pnx8550_driver = {
+        .driver = {
+                .name           = "pnx8550-ohci",
+        },
+        .probe          = ohci_hcd_pnx8550_drv_probe,
+        .remove         = ohci_hcd_pnx8550_drv_remove,
+};
+
+static int __init ohci_hcd_pnx8550_init (void)
+{
+        pr_debug (DRIVER_INFO " (pnx8550)");
+        pr_debug ("block sizes: ed %d td %d\n",
+                sizeof (struct ed), sizeof (struct td));
+
+        return platform_driver_register(&ohci_hcd_pnx8550_driver);
+}
+
+static void __exit ohci_hcd_pnx8550_cleanup (void)
+{
+        platform_driver_unregister(&ohci_hcd_pnx8550_driver);
+}
+
+module_init (ohci_hcd_pnx8550_init);
+module_exit (ohci_hcd_pnx8550_cleanup);