diff options
Diffstat (limited to 'util/uio_usbdebug/linux')
| -rw-r--r-- | util/uio_usbdebug/linux/Makefile | 13 | ||||
| -rw-r--r-- | util/uio_usbdebug/linux/uio_ehci_pci.c | 106 |
2 files changed, 119 insertions, 0 deletions
diff --git a/util/uio_usbdebug/linux/Makefile b/util/uio_usbdebug/linux/Makefile new file mode 100644 index 0000000000..fd60b4f7b8 --- /dev/null +++ b/util/uio_usbdebug/linux/Makefile @@ -0,0 +1,13 @@ + +obj-m := uio_ehci_pci.o + +all: uio_ehci_pci.c + @$(MAKE) -C/lib/modules/`uname -r`/build M=$(CURDIR) modules + +install: + @$(MAKE) -C/lib/modules/`uname -r`/build M=$(CURDIR) modules_install + +clean: + -@$(MAKE) -C/lib/modules/`uname -r`/build M=$(CURDIR) clean + +.PHONY: all install clean diff --git a/util/uio_usbdebug/linux/uio_ehci_pci.c b/util/uio_usbdebug/linux/uio_ehci_pci.c new file mode 100644 index 0000000000..d5c33e3fef --- /dev/null +++ b/util/uio_usbdebug/linux/uio_ehci_pci.c @@ -0,0 +1,106 @@ +/* + * uio_ehci_pci - UIO driver for PCI EHCI devices + * + * Copyright (C) 2013 Nico Huber <nico.h@gmx.de> + * + * This only implements MMIO access (no interrupts). + * + * 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; version 2 of the License. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA + */ + +#include <linux/device.h> +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/uio_driver.h> + +#define DRIVER_VERSION "0.0.1" +#define DRIVER_AUTHOR "Nico Huber <nico.h@gmx.de>" +#define DRIVER_DESC "UIO driver for PCI EHCI devices" +#define DRIVER_TAG "uio_ehci_pci" + +static int probe(struct pci_dev *const pci_dev, + const struct pci_device_id *const did) +{ + struct uio_info *info; + int ret; + + ret = pci_enable_device(pci_dev); + if (ret) + goto return_; + + ret = pci_request_regions(pci_dev, DRIVER_TAG); + if (ret) + goto return_disable; + + info = kzalloc(sizeof(struct uio_info), GFP_KERNEL); + if (!info) { + ret = -ENOMEM; + goto return_release; + } + + info->name = DRIVER_TAG; + info->version = DRIVER_VERSION; + + info->mem[0].name = "EHCI MMIO area"; + info->mem[0].addr = pci_resource_start(pci_dev, 0); + if (!info->mem[0].addr) { + ret = -ENODEV; + goto return_free; + } + info->mem[0].size = pci_resource_len(pci_dev, 0); + info->mem[0].memtype = UIO_MEM_PHYS; + + ret = uio_register_device(&pci_dev->dev, info); + if (ret) + goto return_free; + pci_set_drvdata(pci_dev, info); + + return 0; +return_free: + kfree(info); +return_release: + pci_release_regions(pci_dev); +return_disable: + pci_disable_device(pci_dev); +return_: + return ret; +} + +static void remove(struct pci_dev *const pci_dev) +{ + struct uio_info *const info = pci_get_drvdata(pci_dev); + + uio_unregister_device(info); + kfree(info); + pci_release_regions(pci_dev); + pci_disable_device(pci_dev); +} + +static DEFINE_PCI_DEVICE_TABLE(ehci_pci_ids) = { + { PCI_DEVICE(0x8086, 0x27cc) }, + { 0, } +}; + +static struct pci_driver uio_ehci_pci_driver = { + .name = DRIVER_TAG, + .id_table = ehci_pci_ids, + .probe = probe, + .remove = remove, +}; + +module_pci_driver(uio_ehci_pci_driver); +MODULE_VERSION(DRIVER_VERSION); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); |