| /* |
| * Greybus "AP" USB driver |
| * |
| * Copyright 2014 Google Inc. |
| * |
| * Released under the GPLv2 only. |
| */ |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/errno.h> |
| #include <linux/usb.h> |
| |
| |
| static const struct usb_device_id id_table[] = { |
| { USB_DEVICE(0x0000, 0x0000) }, // FIXME |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(usb, id_table); |
| |
| struct es1_ap_dev { |
| struct usb_device *usb_dev; |
| struct usb_interface *usb_intf; |
| |
| __u8 ap_in_endpoint; |
| __u8 ap_out_endpoint; |
| u8 *ap_buffer; |
| |
| }; |
| |
| /* |
| * Hack, we "know" we will only have one of these at any one time, so only |
| * create one static structure pointer. |
| */ |
| static struct es1_ap_dev *es1_ap_dev; |
| |
| |
| static int ap_probe(struct usb_interface *interface, |
| const struct usb_device_id *id) |
| { |
| struct usb_host_interface *iface_desc; |
| struct usb_endpoint_descriptor *endpoint; |
| size_t buffer_size; |
| int i; |
| |
| if (es1_ap_dev) { |
| dev_err(&interface->dev, "Already have a es1_ap_dev???\n"); |
| return -ENODEV; |
| } |
| es1_ap_dev = kzalloc(sizeof(*es1_ap_dev), GFP_KERNEL); |
| if (!es1_ap_dev) |
| return -ENOMEM; |
| |
| // FIXME |
| // figure out endpoint for talking to the AP. |
| iface_desc = interface->cur_altsetting; |
| for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| endpoint = &iface_desc->endpoint[i].desc; |
| |
| if (usb_endpoint_is_bulk_in(endpoint)) { |
| buffer_size = usb_endpoint_maxp(endpoint); |
| // FIXME - Save buffer_size? |
| es1_ap_dev->ap_in_endpoint = endpoint->bEndpointAddress; |
| } |
| if (usb_endpoint_is_bulk_out(endpoint)) { |
| // FIXME - anything else about this we need? |
| es1_ap_dev->ap_out_endpoint = endpoint->bEndpointAddress; |
| } |
| // FIXME - properly exit once found the AP endpoint |
| // FIXME - set up cport endpoints |
| } |
| |
| // FIXME - allocate buffer |
| // FIXME = start up talking, then create the gb "devices" based on what the AP tells us. |
| |
| es1_ap_dev->usb_intf = interface; |
| es1_ap_dev->usb_dev = usb_get_dev(interface_to_usbdev(interface)); |
| usb_set_intfdata(interface, es1_ap_dev); |
| return 0; |
| } |
| |
| static void ap_disconnect(struct usb_interface *interface) |
| { |
| es1_ap_dev = usb_get_intfdata(interface); |
| |
| /* Tear down everything! */ |
| |
| usb_put_dev(es1_ap_dev->usb_dev); |
| kfree(es1_ap_dev->ap_buffer); |
| kfree(es1_ap_dev); |
| es1_ap_dev = NULL; |
| |
| } |
| |
| static struct usb_driver es1_ap_driver = { |
| .name = "es1_ap_driver", |
| .probe = ap_probe, |
| .disconnect = ap_disconnect, |
| .id_table = id_table, |
| }; |
| |
| module_usb_driver(es1_ap_driver); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |