diff options
Diffstat (limited to 'drivers/usb/dwc3/dwc3-pci.c')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-pci.c | 219 |
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..257859564f91 --- /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 + * All rights reserved. + * + * 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/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); |