360 lines
8.7 KiB
C
360 lines
8.7 KiB
C
#include <linux/module.h>
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#include <linux/utsname.h>
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/*
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* kbuild is not very cooperative with respect to linking separately
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* compiled library objects into one module. So for now we won't use
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* separate compilation ... ensuring init/exit sections work to shrink
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* the runtime footprint, and giving us at least some parts of what
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* a "gcc --combine ... part1.c part2.c part3.c ... " build would.
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*/
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#include "composite.c"
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#include "usbstring.c"
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#include "config.c"
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#include "epautoconf.c"
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#if defined CONFIG_USB_FUNCTIONFS_ETH || defined CONFIG_USB_FUNCTIONFS_RNDIS
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# if defined USB_ETH_RNDIS
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# undef USB_ETH_RNDIS
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# endif
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# ifdef CONFIG_USB_FUNCTIONFS_RNDIS
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# define USB_ETH_RNDIS y
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# endif
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# include "f_ecm.c"
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# include "f_subset.c"
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# ifdef USB_ETH_RNDIS
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# include "f_rndis.c"
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# include "rndis.c"
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# endif
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# include "u_ether.c"
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static u8 gfs_hostaddr[ETH_ALEN];
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# ifdef CONFIG_USB_FUNCTIONFS_ETH
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static int eth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN]);
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# endif
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#else
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# define gether_cleanup() do { } while (0)
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# define gether_setup(gadget, hostaddr) ((int)0)
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# define gfs_hostaddr NULL
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#endif
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#include "f_fs.c"
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#define DRIVER_NAME "g_ffs"
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#define DRIVER_DESC "USB Function Filesystem"
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#define DRIVER_VERSION "24 Aug 2004"
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_AUTHOR("Michal Nazarewicz");
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MODULE_LICENSE("GPL");
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static unsigned short gfs_vendor_id = 0x0525; /* XXX NetChip */
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static unsigned short gfs_product_id = 0xa4ac; /* XXX */
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static struct usb_device_descriptor gfs_dev_desc = {
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.bLength = sizeof gfs_dev_desc,
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.bDescriptorType = USB_DT_DEVICE,
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.bcdUSB = cpu_to_le16(0x0200),
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.bDeviceClass = USB_CLASS_PER_INTERFACE,
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/* Vendor and product id can be overridden by module parameters. */
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/* .idVendor = cpu_to_le16(gfs_vendor_id), */
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/* .idProduct = cpu_to_le16(gfs_product_id), */
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/* .bcdDevice = f(hardware) */
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/* .iManufacturer = DYNAMIC */
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/* .iProduct = DYNAMIC */
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/* NO SERIAL NUMBER */
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.bNumConfigurations = 1,
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};
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#define GFS_MODULE_PARAM_DESC(name, field) \
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MODULE_PARM_DESC(name, "Value of the " #field " field of the device descriptor sent to the host. Takes effect only prior to the user-space driver registering to the FunctionFS.")
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module_param_named(usb_class, gfs_dev_desc.bDeviceClass, byte, 0644);
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GFS_MODULE_PARAM_DESC(usb_class, bDeviceClass);
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module_param_named(usb_subclass, gfs_dev_desc.bDeviceSubClass, byte, 0644);
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GFS_MODULE_PARAM_DESC(usb_subclass, bDeviceSubClass);
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module_param_named(usb_protocol, gfs_dev_desc.bDeviceProtocol, byte, 0644);
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GFS_MODULE_PARAM_DESC(usb_protocol, bDeviceProtocol);
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module_param_named(usb_vendor, gfs_vendor_id, ushort, 0644);
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GFS_MODULE_PARAM_DESC(usb_vendor, idVendor);
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module_param_named(usb_product, gfs_product_id, ushort, 0644);
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GFS_MODULE_PARAM_DESC(usb_product, idProduct);
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static const struct usb_descriptor_header *gfs_otg_desc[] = {
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(const struct usb_descriptor_header *)
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&(const struct usb_otg_descriptor) {
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.bLength = sizeof(struct usb_otg_descriptor),
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.bDescriptorType = USB_DT_OTG,
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/* REVISIT SRP-only hardware is possible, although
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* it would not be called "OTG" ... */
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.bmAttributes = USB_OTG_SRP | USB_OTG_HNP,
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},
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NULL
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};
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/* string IDs are assigned dynamically */
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enum {
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GFS_STRING_MANUFACTURER_IDX,
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GFS_STRING_PRODUCT_IDX,
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GFS_STRING_FIRST_CONFIG_IDX,
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};
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static char gfs_manufacturer[50];
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static const char gfs_driver_desc[] = DRIVER_DESC;
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static const char gfs_short_name[] = DRIVER_NAME;
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static struct usb_string gfs_strings[] = {
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[GFS_STRING_MANUFACTURER_IDX].s = gfs_manufacturer,
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[GFS_STRING_PRODUCT_IDX].s = gfs_driver_desc,
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#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
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{ .s = "FunctionFS + RNDIS" },
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#endif
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#ifdef CONFIG_USB_FUNCTIONFS_ETH
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{ .s = "FunctionFS + ECM" },
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#endif
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#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
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{ .s = "FunctionFS" },
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#endif
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{ } /* end of list */
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};
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static struct usb_gadget_strings *gfs_dev_strings[] = {
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&(struct usb_gadget_strings) {
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.language = 0x0409, /* en-us */
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.strings = gfs_strings,
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},
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NULL,
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};
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struct gfs_configuration {
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struct usb_configuration c;
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int (*eth)(struct usb_configuration *c, u8 *ethaddr);
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} gfs_configurations[] = {
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#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
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{
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.eth = rndis_bind_config,
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},
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#endif
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#ifdef CONFIG_USB_FUNCTIONFS_ETH
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{
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.eth = eth_bind_config,
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},
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#endif
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#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
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{
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},
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#endif
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};
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static int gfs_bind(struct usb_composite_dev *cdev);
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static int gfs_unbind(struct usb_composite_dev *cdev);
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static int gfs_do_config(struct usb_configuration *c);
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static struct usb_composite_driver gfs_driver = {
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.name = gfs_short_name,
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.dev = &gfs_dev_desc,
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.strings = gfs_dev_strings,
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.bind = gfs_bind,
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.unbind = gfs_unbind,
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};
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static struct ffs_data *gfs_ffs_data;
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static unsigned long gfs_registered;
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static int gfs_init(void)
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{
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ENTER();
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return functionfs_init();
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}
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module_init(gfs_init);
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static void gfs_exit(void)
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{
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ENTER();
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if (test_and_clear_bit(0, &gfs_registered))
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usb_composite_unregister(&gfs_driver);
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functionfs_cleanup();
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}
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module_exit(gfs_exit);
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static int functionfs_ready_callback(struct ffs_data *ffs)
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{
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int ret;
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ENTER();
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if (WARN_ON(test_and_set_bit(0, &gfs_registered)))
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return -EBUSY;
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gfs_ffs_data = ffs;
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ret = usb_composite_register(&gfs_driver);
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if (unlikely(ret < 0))
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clear_bit(0, &gfs_registered);
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return ret;
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}
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static void functionfs_closed_callback(struct ffs_data *ffs)
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{
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ENTER();
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if (test_and_clear_bit(0, &gfs_registered))
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usb_composite_unregister(&gfs_driver);
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}
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static int functionfs_check_dev_callback(const char *dev_name)
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{
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return 0;
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}
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static int gfs_bind(struct usb_composite_dev *cdev)
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{
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int ret, i;
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ENTER();
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if (WARN_ON(!gfs_ffs_data))
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return -ENODEV;
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ret = gether_setup(cdev->gadget, gfs_hostaddr);
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if (unlikely(ret < 0))
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goto error_quick;
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gfs_dev_desc.idVendor = cpu_to_le16(gfs_vendor_id);
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gfs_dev_desc.idProduct = cpu_to_le16(gfs_product_id);
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snprintf(gfs_manufacturer, sizeof gfs_manufacturer, "%s %s with %s",
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init_utsname()->sysname, init_utsname()->release,
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cdev->gadget->name);
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ret = usb_string_ids_tab(cdev, gfs_strings);
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if (unlikely(ret < 0))
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goto error;
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gfs_dev_desc.iManufacturer = gfs_strings[GFS_STRING_MANUFACTURER_IDX].id;
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gfs_dev_desc.iProduct = gfs_strings[GFS_STRING_PRODUCT_IDX].id;
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ret = functionfs_bind(gfs_ffs_data, cdev);
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if (unlikely(ret < 0))
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goto error;
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for (i = 0; i < ARRAY_SIZE(gfs_configurations); ++i) {
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struct gfs_configuration *c = gfs_configurations + i;
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ret = GFS_STRING_FIRST_CONFIG_IDX + i;
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c->c.label = gfs_strings[ret].s;
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c->c.iConfiguration = gfs_strings[ret].id;
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c->c.bind = gfs_do_config;
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c->c.bConfigurationValue = 1 + i;
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c->c.bmAttributes = USB_CONFIG_ATT_SELFPOWER;
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ret = usb_add_config(cdev, &c->c);
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if (unlikely(ret < 0))
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goto error_unbind;
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}
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return 0;
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error_unbind:
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functionfs_unbind(gfs_ffs_data);
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error:
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gether_cleanup();
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error_quick:
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gfs_ffs_data = NULL;
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return ret;
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}
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static int gfs_unbind(struct usb_composite_dev *cdev)
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{
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ENTER();
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/* We may have been called in an error recovery frem
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* composite_bind() after gfs_unbind() failure so we need to
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* check if gfs_ffs_data is not NULL since gfs_bind() handles
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* all error recovery itself. I'd rather we werent called
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* from composite on orror recovery, but what you're gonna
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* do...? */
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if (gfs_ffs_data) {
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gether_cleanup();
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functionfs_unbind(gfs_ffs_data);
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gfs_ffs_data = NULL;
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}
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return 0;
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}
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static int gfs_do_config(struct usb_configuration *c)
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{
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struct gfs_configuration *gc =
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container_of(c, struct gfs_configuration, c);
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int ret;
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if (WARN_ON(!gfs_ffs_data))
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return -ENODEV;
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if (gadget_is_otg(c->cdev->gadget)) {
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c->descriptors = gfs_otg_desc;
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c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
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}
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if (gc->eth) {
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ret = gc->eth(c, gfs_hostaddr);
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if (unlikely(ret < 0))
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return ret;
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}
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ret = functionfs_bind_config(c->cdev, c, gfs_ffs_data);
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if (unlikely(ret < 0))
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return ret;
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/* After previous do_configs there may be some invalid
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* pointers in c->interface array. This happens every time
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* a user space function with fewer interfaces than a user
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* space function that was run before the new one is run. The
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* compasit's set_config() assumes that if there is no more
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* then MAX_CONFIG_INTERFACES interfaces in a configuration
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* then there is a NULL pointer after the last interface in
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* c->interface array. We need to make sure this is true. */
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if (c->next_interface_id < ARRAY_SIZE(c->interface))
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c->interface[c->next_interface_id] = NULL;
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return 0;
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}
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#ifdef CONFIG_USB_FUNCTIONFS_ETH
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static int eth_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN])
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{
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return can_support_ecm(c->cdev->gadget)
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? ecm_bind_config(c, ethaddr)
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: geth_bind_config(c, ethaddr);
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}
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#endif
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