1 files changed, 426 insertions, 0 deletions

diff --git a/drivers/usb/gadget/g_ffs.c b/drivers/usb/gadget/g_ffs.c
new file mode 100644
index 000000000000..4b0e4a040d6f
--- /dev/null
+++ b/drivers/usb/gadget/g_ffs.c
@@ -0,0 +1,426 @@
+#include <linux/module.h>
+#include <linux/utsname.h>
+
+
+/*
+ * 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"
+
+#if defined CONFIG_USB_FUNCTIONFS_ETH || defined CONFIG_USB_FUNCTIONFS_RNDIS
+#  if defined USB_ETH_RNDIS
+#    undef USB_ETH_RNDIS
+#  endif
+#  ifdef CONFIG_USB_FUNCTIONFS_RNDIS
+#    define USB_ETH_RNDIS y
+#  endif
+
+#  include "f_ecm.c"
+#  include "f_subset.c"
+#  ifdef USB_ETH_RNDIS
+#    include "f_rndis.c"
+#    include "rndis.c"
+#  endif
+#  include "u_ether.c"
+
+static u8 gfs_hostaddr[ETH_ALEN];
+#else
+#  if !defined CONFIG_USB_FUNCTIONFS_GENERIC
+#    define CONFIG_USB_FUNCTIONFS_GENERIC
+#  endif
+#  define gether_cleanup() do { } while (0)
+#  define gether_setup(gadget, hostaddr)   ((int)0)
+#endif
+
+#include "f_fs.c"
+
+
+#define DRIVER_NAME     "g_ffs"
+#define DRIVER_DESC     "USB Function Filesystem"
+#define DRIVER_VERSION  "24 Aug 2004"
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Michal Nazarewicz");
+MODULE_LICENSE("GPL");
+
+
+static unsigned short gfs_vendor_id    = 0x0525;        /* XXX NetChip */
+static unsigned short gfs_product_id   = 0xa4ac;        /* XXX */
+
+static struct usb_device_descriptor gfs_dev_desc = {
+        .bLength                = sizeof gfs_dev_desc,
+        .bDescriptorType        = USB_DT_DEVICE,
+
+        .bcdUSB                 = cpu_to_le16(0x0200),
+        .bDeviceClass           = USB_CLASS_PER_INTERFACE,
+
+        /* Vendor and product id can be overridden by module parameters.  */
+        /* .idVendor            = cpu_to_le16(gfs_vendor_id), */
+        /* .idProduct           = cpu_to_le16(gfs_product_id), */
+        /* .bcdDevice           = f(hardware) */
+        /* .iManufacturer       = DYNAMIC */
+        /* .iProduct            = DYNAMIC */
+        /* NO SERIAL NUMBER */
+        .bNumConfigurations     = 1,
+};
+
+#define GFS_MODULE_PARAM_DESC(name, field) \
+        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.")
+
+module_param_named(usb_class,    gfs_dev_desc.bDeviceClass,    byte,   0644);
+GFS_MODULE_PARAM_DESC(usb_class, bDeviceClass);
+module_param_named(usb_subclass, gfs_dev_desc.bDeviceSubClass, byte,   0644);
+GFS_MODULE_PARAM_DESC(usb_subclass, bDeviceSubClass);
+module_param_named(usb_protocol, gfs_dev_desc.bDeviceProtocol, byte,   0644);
+GFS_MODULE_PARAM_DESC(usb_protocol, bDeviceProtocol);
+module_param_named(usb_vendor,   gfs_vendor_id,                ushort, 0644);
+GFS_MODULE_PARAM_DESC(usb_vendor, idVendor);
+module_param_named(usb_product,  gfs_product_id,               ushort, 0644);
+GFS_MODULE_PARAM_DESC(usb_product, idProduct);
+
+
+
+static const struct usb_descriptor_header *gfs_otg_desc[] = {
+        (const struct usb_descriptor_header *)
+        &(const struct usb_otg_descriptor) {
+                .bLength                = sizeof(struct usb_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,
+        },
+
+        NULL
+};
+
+/* string IDs are assigned dynamically */
+
+enum {
+        GFS_STRING_MANUFACTURER_IDX,
+        GFS_STRING_PRODUCT_IDX,
+#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
+        GFS_STRING_RNDIS_CONFIG_IDX,
+#endif
+#ifdef CONFIG_USB_FUNCTIONFS_ETH
+        GFS_STRING_ECM_CONFIG_IDX,
+#endif
+#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
+        GFS_STRING_GENERIC_CONFIG_IDX,
+#endif
+};
+
+static       char gfs_manufacturer[50];
+static const char gfs_driver_desc[] = DRIVER_DESC;
+static const char gfs_short_name[]  = DRIVER_NAME;
+
+static struct usb_string gfs_strings[] = {
+        [GFS_STRING_MANUFACTURER_IDX].s = gfs_manufacturer,
+        [GFS_STRING_PRODUCT_IDX].s = gfs_driver_desc,
+#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
+        [GFS_STRING_RNDIS_CONFIG_IDX].s = "FunctionFS + RNDIS",
+#endif
+#ifdef CONFIG_USB_FUNCTIONFS_ETH
+        [GFS_STRING_ECM_CONFIG_IDX].s = "FunctionFS + ECM",
+#endif
+#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
+        [GFS_STRING_GENERIC_CONFIG_IDX].s = "FunctionFS",
+#endif
+        {  } /* end of list */
+};
+
+static struct usb_gadget_strings *gfs_dev_strings[] = {
+        &(struct usb_gadget_strings) {
+                .language       = 0x0409,       /* en-us */
+                .strings        = gfs_strings,
+        },
+        NULL,
+};
+
+
+#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
+static int gfs_do_rndis_config(struct usb_configuration *c);
+
+static struct usb_configuration gfs_rndis_config_driver = {
+        .label                  = "FunctionFS + RNDIS",
+        .bind                   = gfs_do_rndis_config,
+        .bConfigurationValue    = 1,
+        /* .iConfiguration      = DYNAMIC */
+        .bmAttributes           = USB_CONFIG_ATT_SELFPOWER,
+};
+#  define gfs_add_rndis_config(cdev) \
+        usb_add_config(cdev, &gfs_rndis_config_driver)
+#else
+#  define gfs_add_rndis_config(cdev) 0
+#endif
+
+
+#ifdef CONFIG_USB_FUNCTIONFS_ETH
+static int gfs_do_ecm_config(struct usb_configuration *c);
+
+static struct usb_configuration gfs_ecm_config_driver = {
+        .label                  = "FunctionFS + ECM",
+        .bind                   = gfs_do_ecm_config,
+        .bConfigurationValue    = 1,
+        /* .iConfiguration      = DYNAMIC */
+        .bmAttributes           = USB_CONFIG_ATT_SELFPOWER,
+};
+#  define gfs_add_ecm_config(cdev) \
+        usb_add_config(cdev, &gfs_ecm_config_driver)
+#else
+#  define gfs_add_ecm_config(cdev) 0
+#endif
+
+
+#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
+static int gfs_do_generic_config(struct usb_configuration *c);
+
+static struct usb_configuration gfs_generic_config_driver = {
+        .label                  = "FunctionFS",
+        .bind                   = gfs_do_generic_config,
+        .bConfigurationValue    = 2,
+        /* .iConfiguration      = DYNAMIC */
+        .bmAttributes           = USB_CONFIG_ATT_SELFPOWER,
+};
+#  define gfs_add_generic_config(cdev) \
+        usb_add_config(cdev, &gfs_generic_config_driver)
+#else
+#  define gfs_add_generic_config(cdev) 0
+#endif
+
+
+static int gfs_bind(struct usb_composite_dev *cdev);
+static int gfs_unbind(struct usb_composite_dev *cdev);
+
+static struct usb_composite_driver gfs_driver = {
+        .name           = gfs_short_name,
+        .dev            = &gfs_dev_desc,
+        .strings        = gfs_dev_strings,
+        .bind           = gfs_bind,
+        .unbind         = gfs_unbind,
+};
+
+
+static struct ffs_data *gfs_ffs_data;
+static unsigned long gfs_registered;
+
+
+static int  gfs_init(void)
+{
+        ENTER();
+
+        return functionfs_init();
+}
+module_init(gfs_init);
+
+static void  gfs_exit(void)
+{
+        ENTER();
+
+        if (test_and_clear_bit(0, &gfs_registered))
+                usb_composite_unregister(&gfs_driver);
+
+        functionfs_cleanup();
+}
+module_exit(gfs_exit);
+
+
+static int functionfs_ready_callback(struct ffs_data *ffs)
+{
+        int ret;
+
+        ENTER();
+
+        if (WARN_ON(test_and_set_bit(0, &gfs_registered)))
+                return -EBUSY;
+
+        gfs_ffs_data = ffs;
+        ret = usb_composite_register(&gfs_driver);
+        if (unlikely(ret < 0))
+                clear_bit(0, &gfs_registered);
+        return ret;
+}
+
+static void functionfs_closed_callback(struct ffs_data *ffs)
+{
+        ENTER();
+
+        if (test_and_clear_bit(0, &gfs_registered))
+                usb_composite_unregister(&gfs_driver);
+}
+
+
+static int functionfs_check_dev_callback(const char *dev_name)
+{
+        return 0;
+}
+
+
+
+static int gfs_bind(struct usb_composite_dev *cdev)
+{
+        int ret;
+
+        ENTER();
+
+        if (WARN_ON(!gfs_ffs_data))
+                return -ENODEV;
+
+        ret = gether_setup(cdev->gadget, gfs_hostaddr);
+        if (unlikely(ret < 0))
+                goto error_quick;
+
+        gfs_dev_desc.idVendor  = cpu_to_le16(gfs_vendor_id);
+        gfs_dev_desc.idProduct = cpu_to_le16(gfs_product_id);
+
+        snprintf(gfs_manufacturer, sizeof gfs_manufacturer, "%s %s with %s",
+                 init_utsname()->sysname, init_utsname()->release,
+                 cdev->gadget->name);
+        ret = usb_string_id(cdev);
+        if (unlikely(ret < 0))
+                goto error;
+        gfs_strings[GFS_STRING_MANUFACTURER_IDX].id = ret;
+        gfs_dev_desc.iManufacturer = ret;
+
+        ret = usb_string_id(cdev);
+        if (unlikely(ret < 0))
+                goto error;
+        gfs_strings[GFS_STRING_PRODUCT_IDX].id = ret;
+        gfs_dev_desc.iProduct = ret;
+
+#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
+        ret = usb_string_id(cdev);
+        if (unlikely(ret < 0))
+                goto error;
+        gfs_strings[GFS_STRING_RNDIS_CONFIG_IDX].id = ret;
+        gfs_rndis_config_driver.iConfiguration = ret;
+#endif
+
+#ifdef CONFIG_USB_FUNCTIONFS_ETH
+        ret = usb_string_id(cdev);
+        if (unlikely(ret < 0))
+                goto error;
+        gfs_strings[GFS_STRING_ECM_CONFIG_IDX].id = ret;
+        gfs_ecm_config_driver.iConfiguration = ret;
+#endif
+
+#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
+        ret = usb_string_id(cdev);
+        if (unlikely(ret < 0))
+                goto error;
+        gfs_strings[GFS_STRING_GENERIC_CONFIG_IDX].id = ret;
+        gfs_generic_config_driver.iConfiguration = ret;
+#endif
+
+        ret = functionfs_bind(gfs_ffs_data, cdev);
+        if (unlikely(ret < 0))
+                goto error;
+
+        ret = gfs_add_rndis_config(cdev);
+        if (unlikely(ret < 0))
+                goto error_unbind;
+
+        ret = gfs_add_ecm_config(cdev);
+        if (unlikely(ret < 0))
+                goto error_unbind;
+
+        ret = gfs_add_generic_config(cdev);
+        if (unlikely(ret < 0))
+                goto error_unbind;
+
+        return 0;
+
+error_unbind:
+        functionfs_unbind(gfs_ffs_data);
+error:
+        gether_cleanup();
+error_quick:
+        gfs_ffs_data = NULL;
+        return ret;
+}
+
+static int gfs_unbind(struct usb_composite_dev *cdev)
+{
+        ENTER();
+
+        /* We may have been called in an error recovery frem
+         * composite_bind() after gfs_unbind() failure so we need to
+         * check if gfs_ffs_data is not NULL since gfs_bind() handles
+         * all error recovery itself.  I'd rather we werent called
+         * from composite on orror recovery, but what you're gonna
+         * do...? */
+
+        if (gfs_ffs_data) {
+                gether_cleanup();
+                functionfs_unbind(gfs_ffs_data);
+                gfs_ffs_data = NULL;
+        }
+
+        return 0;
+}
+
+
+static int __gfs_do_config(struct usb_configuration *c,
+                           int (*eth)(struct usb_configuration *c, u8 *ethaddr),
+                           u8 *ethaddr)
+{
+        int ret;
+
+        if (WARN_ON(!gfs_ffs_data))
+                return -ENODEV;
+
+        if (gadget_is_otg(c->cdev->gadget)) {
+                c->descriptors = gfs_otg_desc;
+                c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+        }
+
+        if (eth) {
+                ret = eth(c, ethaddr);
+                if (unlikely(ret < 0))
+                        return ret;
+        }
+
+        ret = functionfs_add(c->cdev, c, gfs_ffs_data);
+        if (unlikely(ret < 0))
+                return ret;
+
+        return 0;
+}
+
+#ifdef CONFIG_USB_FUNCTIONFS_RNDIS
+static int gfs_do_rndis_config(struct usb_configuration *c)
+{
+        ENTER();
+
+        return __gfs_do_config(c, rndis_bind_config, gfs_hostaddr);
+}
+#endif
+
+#ifdef CONFIG_USB_FUNCTIONFS_ETH
+static int gfs_do_ecm_config(struct usb_configuration *c)
+{
+        ENTER();
+
+        return __gfs_do_config(c,
+                               can_support_ecm(c->cdev->gadget)
+                             ? ecm_bind_config : geth_bind_config,
+                               gfs_hostaddr);
+}
+#endif
+
+#ifdef CONFIG_USB_FUNCTIONFS_GENERIC
+static int gfs_do_generic_config(struct usb_configuration *c)
+{
+        ENTER();
+
+        return __gfs_do_config(c, NULL, NULL);
+}
+#endif