1 files changed, 219 insertions, 0 deletions

diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
new file mode 100644
index 000000000000..f77c00042685
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -0,0 +1,219 @@
+/**
+ * dwc3-pci.c - PCI Specific glue layer
+ *
+ * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Authors: Felipe Balbi <balbi@ti.com>,
+ *          Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2, as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+
+/* FIXME define these in <linux/pci_ids.h> */
+#define PCI_VENDOR_ID_SYNOPSYS          0x16c3
+#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
+
+#define DWC3_PCI_DEVS_POSSIBLE  32
+
+struct dwc3_pci {
+        struct device           *dev;
+        struct platform_device  *dwc3;
+};
+
+static DECLARE_BITMAP(dwc3_pci_devs, DWC3_PCI_DEVS_POSSIBLE);
+
+static int dwc3_pci_get_device_id(struct dwc3_pci *glue)
+{
+        int             id;
+
+again:
+        id = find_first_zero_bit(dwc3_pci_devs, DWC3_PCI_DEVS_POSSIBLE);
+        if (id < DWC3_PCI_DEVS_POSSIBLE) {
+                int old;
+
+                old = test_and_set_bit(id, dwc3_pci_devs);
+                if (old)
+                        goto again;
+        } else {
+                dev_err(glue->dev, "no space for new device\n");
+                id = -ENOMEM;
+        }
+
+        return 0;
+}
+
+static void dwc3_pci_put_device_id(struct dwc3_pci *glue, int id)
+{
+        int                     ret;
+
+        if (id < 0)
+                return;
+
+        ret = test_bit(id, dwc3_pci_devs);
+        WARN(!ret, "Device: %s\nID %d not in use\n",
+                        dev_driver_string(glue->dev), id);
+        clear_bit(id, dwc3_pci_devs);
+}
+
+static int __devinit dwc3_pci_probe(struct pci_dev *pci,
+                const struct pci_device_id *id)
+{
+        struct resource         res[2];
+        struct platform_device  *dwc3;
+        struct dwc3_pci         *glue;
+        int                     ret = -ENOMEM;
+        int                     devid;
+
+        glue = kzalloc(sizeof(*glue), GFP_KERNEL);
+        if (!glue) {
+                dev_err(&pci->dev, "not enough memory\n");
+                goto err0;
+        }
+
+        glue->dev       = &pci->dev;
+
+        ret = pci_enable_device(pci);
+        if (ret) {
+                dev_err(&pci->dev, "failed to enable pci device\n");
+                goto err1;
+        }
+
+        pci_set_power_state(pci, PCI_D0);
+        pci_set_master(pci);
+
+        devid = dwc3_pci_get_device_id(glue);
+        if (devid < 0)
+                goto err2;
+
+        dwc3 = platform_device_alloc("dwc3-pci", devid);
+        if (!dwc3) {
+                dev_err(&pci->dev, "couldn't allocate dwc3 device\n");
+                goto err3;
+        }
+
+        memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
+
+        res[0].start    = pci_resource_start(pci, 0);
+        res[0].end      = pci_resource_end(pci, 0);
+        res[0].name     = "dwc_usb3";
+        res[0].flags    = IORESOURCE_MEM;
+
+        res[1].start    = pci->irq;
+        res[1].name     = "dwc_usb3";
+        res[1].flags    = IORESOURCE_IRQ;
+
+        ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
+        if (ret) {
+                dev_err(&pci->dev, "couldn't add resources to dwc3 device\n");
+                goto err4;
+        }
+
+        pci_set_drvdata(pci, glue);
+
+        dma_set_coherent_mask(&dwc3->dev, pci->dev.coherent_dma_mask);
+
+        dwc3->dev.dma_mask = pci->dev.dma_mask;
+        dwc3->dev.dma_parms = pci->dev.dma_parms;
+        dwc3->dev.parent = &pci->dev;
+        glue->dwc3      = dwc3;
+
+        ret = platform_device_add(dwc3);
+        if (ret) {
+                dev_err(&pci->dev, "failed to register dwc3 device\n");
+                goto err4;
+        }
+
+        return 0;
+
+err4:
+        pci_set_drvdata(pci, NULL);
+        platform_device_put(dwc3);
+
+err3:
+        dwc3_pci_put_device_id(glue, devid);
+
+err2:
+        pci_disable_device(pci);
+
+err1:
+        kfree(pci);
+
+err0:
+        return ret;
+}
+
+static void __devexit dwc3_pci_remove(struct pci_dev *pci)
+{
+        struct dwc3_pci *glue = pci_get_drvdata(pci);
+
+        dwc3_pci_put_device_id(glue, glue->dwc3->id);
+        platform_device_unregister(glue->dwc3);
+        pci_set_drvdata(pci, NULL);
+        pci_disable_device(pci);
+        kfree(glue);
+}
+
+static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
+        {
+                PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
+                                PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
+        },
+        {  }    /* Terminating Entry */
+};
+MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
+
+static struct pci_driver dwc3_pci_driver = {
+        .name           = "pci-dwc3",
+        .id_table       = dwc3_pci_id_table,
+        .probe          = dwc3_pci_probe,
+        .remove         = __devexit_p(dwc3_pci_remove),
+};
+
+MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
+
+static int __devinit dwc3_pci_init(void)
+{
+        return pci_register_driver(&dwc3_pci_driver);
+}
+module_init(dwc3_pci_init);
+
+static void __exit dwc3_pci_exit(void)
+{
+        pci_unregister_driver(&dwc3_pci_driver);
+}
+module_exit(dwc3_pci_exit);