Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / drivers / usb / gadget / ci13xxx_pci.c

diff --git a/drivers/usb/gadget/ci13xxx_pci.c b/drivers/usb/gadget/ci13xxx_pci.c
new file mode 100644 (file)
index 0000000..883ab5e
--- /dev/null
+++ b/drivers/usb/gadget/ci13xxx_pci.c
@@ -0,0 +1,176 @@
+/*
+ * ci13xxx_pci.c - MIPS USB IP core family device controller
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#include "ci13xxx_udc.c"
+
+/* driver name */
+#define UDC_DRIVER_NAME   "ci13xxx_pci"
+
+/******************************************************************************
+ * PCI block
+ *****************************************************************************/
+/**
+ * ci13xxx_pci_irq: interrut handler
+ * @irq:  irq number
+ * @pdev: USB Device Controller interrupt source
+ *
+ * This function returns IRQ_HANDLED if the IRQ has been handled
+ * This is an ISR don't trace, use attribute interface instead
+ */
+static irqreturn_t ci13xxx_pci_irq(int irq, void *pdev)
+{
+       if (irq == 0) {
+               dev_err(&((struct pci_dev *)pdev)->dev, "Invalid IRQ0 usage!");
+               return IRQ_HANDLED;
+       }
+       return udc_irq();
+}
+
+static struct ci13xxx_udc_driver ci13xxx_pci_udc_driver = {
+       .name           = UDC_DRIVER_NAME,
+};
+
+/**
+ * ci13xxx_pci_probe: PCI probe
+ * @pdev: USB device controller being probed
+ * @id:   PCI hotplug ID connecting controller to UDC framework
+ *
+ * This function returns an error code
+ * Allocates basic PCI resources for this USB device controller, and then
+ * invokes the udc_probe() method to start the UDC associated with it
+ */
+static int __devinit ci13xxx_pci_probe(struct pci_dev *pdev,
+                                      const struct pci_device_id *id)
+{
+       void __iomem *regs = NULL;
+       int retval = 0;
+
+       if (id == NULL)
+               return -EINVAL;
+
+       retval = pci_enable_device(pdev);
+       if (retval)
+               goto done;
+
+       if (!pdev->irq) {
+               dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
+               retval = -ENODEV;
+               goto disable_device;
+       }
+
+       retval = pci_request_regions(pdev, UDC_DRIVER_NAME);
+       if (retval)
+               goto disable_device;
+
+       /* BAR 0 holds all the registers */
+       regs = pci_iomap(pdev, 0, 0);
+       if (!regs) {
+               dev_err(&pdev->dev, "Error mapping memory!");
+               retval = -EFAULT;
+               goto release_regions;
+       }
+       pci_set_drvdata(pdev, (__force void *)regs);
+
+       pci_set_master(pdev);
+       pci_try_set_mwi(pdev);
+
+       retval = udc_probe(&ci13xxx_pci_udc_driver, &pdev->dev, regs);
+       if (retval)
+               goto iounmap;
+
+       /* our device does not have MSI capability */
+
+       retval = request_irq(pdev->irq, ci13xxx_pci_irq, IRQF_SHARED,
+                            UDC_DRIVER_NAME, pdev);
+       if (retval)
+               goto gadget_remove;
+
+       return 0;
+
+ gadget_remove:
+       udc_remove();
+ iounmap:
+       pci_iounmap(pdev, regs);
+ release_regions:
+       pci_release_regions(pdev);
+ disable_device:
+       pci_disable_device(pdev);
+ done:
+       return retval;
+}
+
+/**
+ * ci13xxx_pci_remove: PCI remove
+ * @pdev: USB Device Controller being removed
+ *
+ * Reverses the effect of ci13xxx_pci_probe(),
+ * first invoking the udc_remove() and then releases
+ * all PCI resources allocated for this USB device controller
+ */
+static void __devexit ci13xxx_pci_remove(struct pci_dev *pdev)
+{
+       free_irq(pdev->irq, pdev);
+       udc_remove();
+       pci_iounmap(pdev, (__force void __iomem *)pci_get_drvdata(pdev));
+       pci_release_regions(pdev);
+       pci_disable_device(pdev);
+}
+
+/**
+ * PCI device table
+ * PCI device structure
+ *
+ * Check "pci.h" for details
+ */
+static DEFINE_PCI_DEVICE_TABLE(ci13xxx_pci_id_table) = {
+       { PCI_DEVICE(0x153F, 0x1004) },
+       { PCI_DEVICE(0x153F, 0x1006) },
+       { 0, 0, 0, 0, 0, 0, 0 /* end: all zeroes */ }
+};
+MODULE_DEVICE_TABLE(pci, ci13xxx_pci_id_table);
+
+static struct pci_driver ci13xxx_pci_driver = {
+       .name         = UDC_DRIVER_NAME,
+       .id_table     = ci13xxx_pci_id_table,
+       .probe        = ci13xxx_pci_probe,
+       .remove       = __devexit_p(ci13xxx_pci_remove),
+};
+
+/**
+ * ci13xxx_pci_init: module init
+ *
+ * Driver load
+ */
+static int __init ci13xxx_pci_init(void)
+{
+       return pci_register_driver(&ci13xxx_pci_driver);
+}
+module_init(ci13xxx_pci_init);
+
+/**
+ * ci13xxx_pci_exit: module exit
+ *
+ * Driver unload
+ */
+static void __exit ci13xxx_pci_exit(void)
+{
+       pci_unregister_driver(&ci13xxx_pci_driver);
+}
+module_exit(ci13xxx_pci_exit);
+
+MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
+MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("June 2008");