1 files changed, 288 insertions, 0 deletions

diff --git a/drivers/usb/gadget/hid.c b/drivers/usb/gadget/hid.c
new file mode 100644
index 000000000000..b77e97754b4a
--- /dev/null
+++ b/drivers/usb/gadget/hid.c
@@ -0,0 +1,288 @@
+/*
+ * hid.c -- HID Composite driver
+ *
+ * Based on multi.c
+ *
+ * Copyright (C) 2010 Fabien Chouteau <fabien.chouteau@barco.com>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/list.h>
+
+#define DRIVER_DESC             "HID Gadget"
+#define DRIVER_VERSION          "2010/03/16"
+
+/*-------------------------------------------------------------------------*/
+
+#define HIDG_VENDOR_NUM         0x0525  /* XXX NetChip */
+#define HIDG_PRODUCT_NUM        0xa4ac  /* Linux-USB HID gadget */
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * kbuild is not very cooperative with respect to linking separately
+ * compiled library objects into one module.  So for now we won't use
+ * separate compilation ... ensuring init/exit sections work to shrink
+ * the runtime footprint, and giving us at least some parts of what
+ * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
+ */
+
+#include "composite.c"
+#include "usbstring.c"
+#include "config.c"
+#include "epautoconf.c"
+
+#include "f_hid.c"
+
+
+struct hidg_func_node {
+        struct list_head node;
+        struct hidg_func_descriptor *func;
+};
+
+static LIST_HEAD(hidg_func_list);
+
+/*-------------------------------------------------------------------------*/
+
+static struct usb_device_descriptor device_desc = {
+        .bLength =              sizeof device_desc,
+        .bDescriptorType =      USB_DT_DEVICE,
+
+        .bcdUSB =               cpu_to_le16(0x0200),
+
+        /* .bDeviceClass =              USB_CLASS_COMM, */
+        /* .bDeviceSubClass =   0, */
+        /* .bDeviceProtocol =   0, */
+        .bDeviceClass =         0xEF,
+        .bDeviceSubClass =      2,
+        .bDeviceProtocol =      1,
+        /* .bMaxPacketSize0 = f(hardware) */
+
+        /* Vendor and product id can be overridden by module parameters.  */
+        .idVendor =             cpu_to_le16(HIDG_VENDOR_NUM),
+        .idProduct =            cpu_to_le16(HIDG_PRODUCT_NUM),
+        /* .bcdDevice = f(hardware) */
+        /* .iManufacturer = DYNAMIC */
+        /* .iProduct = DYNAMIC */
+        /* NO SERIAL NUMBER */
+        .bNumConfigurations =   1,
+};
+
+static struct usb_otg_descriptor otg_descriptor = {
+        .bLength =              sizeof otg_descriptor,
+        .bDescriptorType =      USB_DT_OTG,
+
+        /* REVISIT SRP-only hardware is possible, although
+         * it would not be called "OTG" ...
+         */
+        .bmAttributes =         USB_OTG_SRP | USB_OTG_HNP,
+};
+
+static const struct usb_descriptor_header *otg_desc[] = {
+        (struct usb_descriptor_header *) &otg_descriptor,
+        NULL,
+};
+
+
+/* string IDs are assigned dynamically */
+
+#define STRING_MANUFACTURER_IDX         0
+#define STRING_PRODUCT_IDX              1
+
+static char manufacturer[50];
+
+static struct usb_string strings_dev[] = {
+        [STRING_MANUFACTURER_IDX].s = manufacturer,
+        [STRING_PRODUCT_IDX].s = DRIVER_DESC,
+        {  } /* end of list */
+};
+
+static struct usb_gadget_strings stringtab_dev = {
+        .language       = 0x0409,       /* en-us */
+        .strings        = strings_dev,
+};
+
+static struct usb_gadget_strings *dev_strings[] = {
+        &stringtab_dev,
+        NULL,
+};
+
+
+
+/****************************** Configurations ******************************/
+
+static int __init do_config(struct usb_configuration *c)
+{
+        struct hidg_func_node *e;
+        int func = 0, status = 0;
+
+        if (gadget_is_otg(c->cdev->gadget)) {
+                c->descriptors = otg_desc;
+                c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+        }
+
+        list_for_each_entry(e, &hidg_func_list, node) {
+                status = hidg_bind_config(c, e->func, func++);
+                if (status)
+                        break;
+        }
+
+        return status;
+}
+
+static struct usb_configuration config_driver = {
+        .label                  = "HID Gadget",
+        .bind                   = do_config,
+        .bConfigurationValue    = 1,
+        /* .iConfiguration = DYNAMIC */
+        .bmAttributes           = USB_CONFIG_ATT_SELFPOWER,
+};
+
+/****************************** Gadget Bind ******************************/
+
+static int __init hid_bind(struct usb_composite_dev *cdev)
+{
+        struct usb_gadget *gadget = cdev->gadget;
+        struct list_head *tmp;
+        int status, gcnum, funcs = 0;
+
+        list_for_each(tmp, &hidg_func_list)
+                funcs++;
+
+        if (!funcs)
+                return -ENODEV;
+
+        /* set up HID */
+        status = ghid_setup(cdev->gadget, funcs);
+        if (status < 0)
+                return status;
+
+        gcnum = usb_gadget_controller_number(gadget);
+        if (gcnum >= 0)
+                device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum);
+        else
+                device_desc.bcdDevice = cpu_to_le16(0x0300 | 0x0099);
+
+
+        /* Allocate string descriptor numbers ... note that string
+         * contents can be overridden by the composite_dev glue.
+         */
+
+        /* device descriptor strings: manufacturer, product */
+        snprintf(manufacturer, sizeof manufacturer, "%s %s with %s",
+                init_utsname()->sysname, init_utsname()->release,
+                gadget->name);
+        status = usb_string_id(cdev);
+        if (status < 0)
+                return status;
+        strings_dev[STRING_MANUFACTURER_IDX].id = status;
+        device_desc.iManufacturer = status;
+
+        status = usb_string_id(cdev);
+        if (status < 0)
+                return status;
+        strings_dev[STRING_PRODUCT_IDX].id = status;
+        device_desc.iProduct = status;
+
+        /* register our configuration */
+        status = usb_add_config(cdev, &config_driver);
+        if (status < 0)
+                return status;
+
+        dev_info(&gadget->dev, DRIVER_DESC ", version: " DRIVER_VERSION "\n");
+
+        return 0;
+}
+
+static int __exit hid_unbind(struct usb_composite_dev *cdev)
+{
+        ghid_cleanup();
+        return 0;
+}
+
+static int __init hidg_plat_driver_probe(struct platform_device *pdev)
+{
+        struct hidg_func_descriptor *func = pdev->dev.platform_data;
+        struct hidg_func_node *entry;
+
+        if (!func) {
+                dev_err(&pdev->dev, "Platform data missing\n");
+                return -ENODEV;
+        }
+
+        entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+        if (!entry)
+                return -ENOMEM;
+
+        entry->func = func;
+        list_add_tail(&entry->node, &hidg_func_list);
+
+        return 0;
+}
+
+static int __devexit hidg_plat_driver_remove(struct platform_device *pdev)
+{
+        struct hidg_func_node *e, *n;
+
+        list_for_each_entry_safe(e, n, &hidg_func_list, node) {
+                list_del(&e->node);
+                kfree(e);
+        }
+
+        return 0;
+}
+
+
+/****************************** Some noise ******************************/
+
+
+static struct usb_composite_driver hidg_driver = {
+        .name           = "g_hid",
+        .dev            = &device_desc,
+        .strings        = dev_strings,
+        .bind           = hid_bind,
+        .unbind         = __exit_p(hid_unbind),
+};
+
+static struct platform_driver hidg_plat_driver = {
+        .remove         = __devexit_p(hidg_plat_driver_remove),
+        .driver         = {
+                .owner  = THIS_MODULE,
+                .name   = "hidg",
+        },
+};
+
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Fabien Chouteau, Peter Korsgaard");
+MODULE_LICENSE("GPL");
+
+static int __init hidg_init(void)
+{
+        platform_driver_probe(&hidg_plat_driver, hidg_plat_driver_probe);
+        return usb_composite_register(&hidg_driver);
+}
+module_init(hidg_init);
+
+static void __exit hidg_cleanup(void)
+{
+        platform_driver_unregister(&hidg_plat_driver);
+        usb_composite_unregister(&hidg_driver);
+}
+module_exit(hidg_cleanup);