1 files changed, 510 insertions, 0 deletions

diff --git a/drivers/usb/gadget/legacy/multi.c b/drivers/usb/gadget/legacy/multi.c
new file mode 100644
index 000000000000..39d27bb343b4
--- /dev/null
+++ b/drivers/usb/gadget/legacy/multi.c
@@ -0,0 +1,510 @@
+/*
+ * multi.c -- Multifunction Composite driver
+ *
+ * Copyright (C) 2008 David Brownell
+ * Copyright (C) 2008 Nokia Corporation
+ * Copyright (C) 2009 Samsung Electronics
+ * Author: Michal Nazarewicz (mina86@mina86.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.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+
+#include "u_serial.h"
+#if defined USB_ETH_RNDIS
+#  undef USB_ETH_RNDIS
+#endif
+#ifdef CONFIG_USB_G_MULTI_RNDIS
+#  define USB_ETH_RNDIS y
+#endif
+
+
+#define DRIVER_DESC             "Multifunction Composite Gadget"
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Michal Nazarewicz");
+MODULE_LICENSE("GPL");
+
+
+#include "f_mass_storage.h"
+
+#include "u_ecm.h"
+#ifdef USB_ETH_RNDIS
+#  include "u_rndis.h"
+#  include "rndis.h"
+#endif
+#include "u_ether.h"
+
+USB_GADGET_COMPOSITE_OPTIONS();
+
+USB_ETHERNET_MODULE_PARAMETERS();
+
+/***************************** Device Descriptor ****************************/
+
+#define MULTI_VENDOR_NUM        0x1d6b  /* Linux Foundation */
+#define MULTI_PRODUCT_NUM       0x0104  /* Multifunction Composite Gadget */
+
+
+enum {
+        __MULTI_NO_CONFIG,
+#ifdef CONFIG_USB_G_MULTI_RNDIS
+        MULTI_RNDIS_CONFIG_NUM,
+#endif
+#ifdef CONFIG_USB_G_MULTI_CDC
+        MULTI_CDC_CONFIG_NUM,
+#endif
+};
+
+
+static struct usb_device_descriptor device_desc = {
+        .bLength =              sizeof device_desc,
+        .bDescriptorType =      USB_DT_DEVICE,
+
+        .bcdUSB =               cpu_to_le16(0x0200),
+
+        .bDeviceClass =         USB_CLASS_MISC /* 0xEF */,
+        .bDeviceSubClass =      2,
+        .bDeviceProtocol =      1,
+
+        /* Vendor and product id can be overridden by module parameters.  */
+        .idVendor =             cpu_to_le16(MULTI_VENDOR_NUM),
+        .idProduct =            cpu_to_le16(MULTI_PRODUCT_NUM),
+};
+
+
+static const struct usb_descriptor_header *otg_desc[] = {
+        (struct usb_descriptor_header *) &(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,
+};
+
+
+enum {
+        MULTI_STRING_RNDIS_CONFIG_IDX = USB_GADGET_FIRST_AVAIL_IDX,
+        MULTI_STRING_CDC_CONFIG_IDX,
+};
+
+static struct usb_string strings_dev[] = {
+        [USB_GADGET_MANUFACTURER_IDX].s = "",
+        [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC,
+        [USB_GADGET_SERIAL_IDX].s = "",
+        [MULTI_STRING_RNDIS_CONFIG_IDX].s = "Multifunction with RNDIS",
+        [MULTI_STRING_CDC_CONFIG_IDX].s   = "Multifunction with CDC ECM",
+        {  } /* end of list */
+};
+
+static struct usb_gadget_strings *dev_strings[] = {
+        &(struct usb_gadget_strings){
+                .language       = 0x0409,       /* en-us */
+                .strings        = strings_dev,
+        },
+        NULL,
+};
+
+
+
+
+/****************************** Configurations ******************************/
+
+static struct fsg_module_parameters fsg_mod_data = { .stall = 1 };
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+static unsigned int fsg_num_buffers = CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS;
+
+#else
+
+/*
+ * Number of buffers we will use.
+ * 2 is usually enough for good buffering pipeline
+ */
+#define fsg_num_buffers CONFIG_USB_GADGET_STORAGE_NUM_BUFFERS
+
+#endif /* CONFIG_USB_GADGET_DEBUG_FILES */
+
+FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
+
+static struct usb_function_instance *fi_acm;
+static struct usb_function_instance *fi_msg;
+
+/********** RNDIS **********/
+
+#ifdef USB_ETH_RNDIS
+static struct usb_function_instance *fi_rndis;
+static struct usb_function *f_acm_rndis;
+static struct usb_function *f_rndis;
+static struct usb_function *f_msg_rndis;
+
+static __init int rndis_do_config(struct usb_configuration *c)
+{
+        struct fsg_opts *fsg_opts;
+        int ret;
+
+        if (gadget_is_otg(c->cdev->gadget)) {
+                c->descriptors = otg_desc;
+                c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+        }
+
+        f_rndis = usb_get_function(fi_rndis);
+        if (IS_ERR(f_rndis))
+                return PTR_ERR(f_rndis);
+
+        ret = usb_add_function(c, f_rndis);
+        if (ret < 0)
+                goto err_func_rndis;
+
+        f_acm_rndis = usb_get_function(fi_acm);
+        if (IS_ERR(f_acm_rndis)) {
+                ret = PTR_ERR(f_acm_rndis);
+                goto err_func_acm;
+        }
+
+        ret = usb_add_function(c, f_acm_rndis);
+        if (ret)
+                goto err_conf;
+
+        f_msg_rndis = usb_get_function(fi_msg);
+        if (IS_ERR(f_msg_rndis)) {
+                ret = PTR_ERR(f_msg_rndis);
+                goto err_fsg;
+        }
+
+        fsg_opts = fsg_opts_from_func_inst(fi_msg);
+        ret = fsg_common_run_thread(fsg_opts->common);
+        if (ret)
+                goto err_run;
+
+        ret = usb_add_function(c, f_msg_rndis);
+        if (ret)
+                goto err_run;
+
+        return 0;
+err_run:
+        usb_put_function(f_msg_rndis);
+err_fsg:
+        usb_remove_function(c, f_acm_rndis);
+err_conf:
+        usb_put_function(f_acm_rndis);
+err_func_acm:
+        usb_remove_function(c, f_rndis);
+err_func_rndis:
+        usb_put_function(f_rndis);
+        return ret;
+}
+
+static __ref int rndis_config_register(struct usb_composite_dev *cdev)
+{
+        static struct usb_configuration config = {
+                .bConfigurationValue    = MULTI_RNDIS_CONFIG_NUM,
+                .bmAttributes           = USB_CONFIG_ATT_SELFPOWER,
+        };
+
+        config.label          = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].s;
+        config.iConfiguration = strings_dev[MULTI_STRING_RNDIS_CONFIG_IDX].id;
+
+        return usb_add_config(cdev, &config, rndis_do_config);
+}
+
+#else
+
+static __ref int rndis_config_register(struct usb_composite_dev *cdev)
+{
+        return 0;
+}
+
+#endif
+
+
+/********** CDC ECM **********/
+
+#ifdef CONFIG_USB_G_MULTI_CDC
+static struct usb_function_instance *fi_ecm;
+static struct usb_function *f_acm_multi;
+static struct usb_function *f_ecm;
+static struct usb_function *f_msg_multi;
+
+static __init int cdc_do_config(struct usb_configuration *c)
+{
+        struct fsg_opts *fsg_opts;
+        int ret;
+
+        if (gadget_is_otg(c->cdev->gadget)) {
+                c->descriptors = otg_desc;
+                c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+        }
+
+        f_ecm = usb_get_function(fi_ecm);
+        if (IS_ERR(f_ecm))
+                return PTR_ERR(f_ecm);
+
+        ret = usb_add_function(c, f_ecm);
+        if (ret < 0)
+                goto err_func_ecm;
+
+        /* implicit port_num is zero */
+        f_acm_multi = usb_get_function(fi_acm);
+        if (IS_ERR(f_acm_multi)) {
+                ret = PTR_ERR(f_acm_multi);
+                goto err_func_acm;
+        }
+
+        ret = usb_add_function(c, f_acm_multi);
+        if (ret)
+                goto err_conf;
+
+        f_msg_multi = usb_get_function(fi_msg);
+        if (IS_ERR(f_msg_multi)) {
+                ret = PTR_ERR(f_msg_multi);
+                goto err_fsg;
+        }
+
+        fsg_opts = fsg_opts_from_func_inst(fi_msg);
+        ret = fsg_common_run_thread(fsg_opts->common);
+        if (ret)
+                goto err_run;
+
+        ret = usb_add_function(c, f_msg_multi);
+        if (ret)
+                goto err_run;
+
+        return 0;
+err_run:
+        usb_put_function(f_msg_multi);
+err_fsg:
+        usb_remove_function(c, f_acm_multi);
+err_conf:
+        usb_put_function(f_acm_multi);
+err_func_acm:
+        usb_remove_function(c, f_ecm);
+err_func_ecm:
+        usb_put_function(f_ecm);
+        return ret;
+}
+
+static __ref int cdc_config_register(struct usb_composite_dev *cdev)
+{
+        static struct usb_configuration config = {
+                .bConfigurationValue    = MULTI_CDC_CONFIG_NUM,
+                .bmAttributes           = USB_CONFIG_ATT_SELFPOWER,
+        };
+
+        config.label          = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].s;
+        config.iConfiguration = strings_dev[MULTI_STRING_CDC_CONFIG_IDX].id;
+
+        return usb_add_config(cdev, &config, cdc_do_config);
+}
+
+#else
+
+static __ref int cdc_config_register(struct usb_composite_dev *cdev)
+{
+        return 0;
+}
+
+#endif
+
+
+
+/****************************** Gadget Bind ******************************/
+
+static int __ref multi_bind(struct usb_composite_dev *cdev)
+{
+        struct usb_gadget *gadget = cdev->gadget;
+#ifdef CONFIG_USB_G_MULTI_CDC
+        struct f_ecm_opts *ecm_opts;
+#endif
+#ifdef USB_ETH_RNDIS
+        struct f_rndis_opts *rndis_opts;
+#endif
+        struct fsg_opts *fsg_opts;
+        struct fsg_config config;
+        int status;
+
+        if (!can_support_ecm(cdev->gadget)) {
+                dev_err(&gadget->dev, "controller '%s' not usable\n",
+                        gadget->name);
+                return -EINVAL;
+        }
+
+#ifdef CONFIG_USB_G_MULTI_CDC
+        fi_ecm = usb_get_function_instance("ecm");
+        if (IS_ERR(fi_ecm))
+                return PTR_ERR(fi_ecm);
+
+        ecm_opts = container_of(fi_ecm, struct f_ecm_opts, func_inst);
+
+        gether_set_qmult(ecm_opts->net, qmult);
+        if (!gether_set_host_addr(ecm_opts->net, host_addr))
+                pr_info("using host ethernet address: %s", host_addr);
+        if (!gether_set_dev_addr(ecm_opts->net, dev_addr))
+                pr_info("using self ethernet address: %s", dev_addr);
+#endif
+
+#ifdef USB_ETH_RNDIS
+        fi_rndis = usb_get_function_instance("rndis");
+        if (IS_ERR(fi_rndis)) {
+                status = PTR_ERR(fi_rndis);
+                goto fail;
+        }
+
+        rndis_opts = container_of(fi_rndis, struct f_rndis_opts, func_inst);
+
+        gether_set_qmult(rndis_opts->net, qmult);
+        if (!gether_set_host_addr(rndis_opts->net, host_addr))
+                pr_info("using host ethernet address: %s", host_addr);
+        if (!gether_set_dev_addr(rndis_opts->net, dev_addr))
+                pr_info("using self ethernet address: %s", dev_addr);
+#endif
+
+#if (defined CONFIG_USB_G_MULTI_CDC && defined USB_ETH_RNDIS)
+        /*
+         * If both ecm and rndis are selected then:
+         *      1) rndis borrows the net interface from ecm
+         *      2) since the interface is shared it must not be bound
+         *      twice - in ecm's _and_ rndis' binds, so do it here.
+         */
+        gether_set_gadget(ecm_opts->net, cdev->gadget);
+        status = gether_register_netdev(ecm_opts->net);
+        if (status)
+                goto fail0;
+
+        rndis_borrow_net(fi_rndis, ecm_opts->net);
+        ecm_opts->bound = true;
+#endif
+
+        /* set up serial link layer */
+        fi_acm = usb_get_function_instance("acm");
+        if (IS_ERR(fi_acm)) {
+                status = PTR_ERR(fi_acm);
+                goto fail0;
+        }
+
+        /* set up mass storage function */
+        fi_msg = usb_get_function_instance("mass_storage");
+        if (IS_ERR(fi_msg)) {
+                status = PTR_ERR(fi_msg);
+                goto fail1;
+        }
+        fsg_config_from_params(&config, &fsg_mod_data, fsg_num_buffers);
+        fsg_opts = fsg_opts_from_func_inst(fi_msg);
+
+        fsg_opts->no_configfs = true;
+        status = fsg_common_set_num_buffers(fsg_opts->common, fsg_num_buffers);
+        if (status)
+                goto fail2;
+
+        status = fsg_common_set_nluns(fsg_opts->common, config.nluns);
+        if (status)
+                goto fail_set_nluns;
+
+        status = fsg_common_set_cdev(fsg_opts->common, cdev, config.can_stall);
+        if (status)
+                goto fail_set_cdev;
+
+        fsg_common_set_sysfs(fsg_opts->common, true);
+        status = fsg_common_create_luns(fsg_opts->common, &config);
+        if (status)
+                goto fail_set_cdev;
+
+        fsg_common_set_inquiry_string(fsg_opts->common, config.vendor_name,
+                                      config.product_name);
+
+        /* allocate string IDs */
+        status = usb_string_ids_tab(cdev, strings_dev);
+        if (unlikely(status < 0))
+                goto fail_string_ids;
+        device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
+
+        /* register configurations */
+        status = rndis_config_register(cdev);
+        if (unlikely(status < 0))
+                goto fail_string_ids;
+
+        status = cdc_config_register(cdev);
+        if (unlikely(status < 0))
+                goto fail_string_ids;
+        usb_composite_overwrite_options(cdev, &coverwrite);
+
+        /* we're done */
+        dev_info(&gadget->dev, DRIVER_DESC "\n");
+        return 0;
+
+
+        /* error recovery */
+fail_string_ids:
+        fsg_common_remove_luns(fsg_opts->common);
+fail_set_cdev:
+        fsg_common_free_luns(fsg_opts->common);
+fail_set_nluns:
+        fsg_common_free_buffers(fsg_opts->common);
+fail2:
+        usb_put_function_instance(fi_msg);
+fail1:
+        usb_put_function_instance(fi_acm);
+fail0:
+#ifdef USB_ETH_RNDIS
+        usb_put_function_instance(fi_rndis);
+fail:
+#endif
+#ifdef CONFIG_USB_G_MULTI_CDC
+        usb_put_function_instance(fi_ecm);
+#endif
+        return status;
+}
+
+static int __exit multi_unbind(struct usb_composite_dev *cdev)
+{
+#ifdef CONFIG_USB_G_MULTI_CDC
+        usb_put_function(f_msg_multi);
+#endif
+#ifdef USB_ETH_RNDIS
+        usb_put_function(f_msg_rndis);
+#endif
+        usb_put_function_instance(fi_msg);
+#ifdef CONFIG_USB_G_MULTI_CDC
+        usb_put_function(f_acm_multi);
+#endif
+#ifdef USB_ETH_RNDIS
+        usb_put_function(f_acm_rndis);
+#endif
+        usb_put_function_instance(fi_acm);
+#ifdef USB_ETH_RNDIS
+        usb_put_function(f_rndis);
+        usb_put_function_instance(fi_rndis);
+#endif
+#ifdef CONFIG_USB_G_MULTI_CDC
+        usb_put_function(f_ecm);
+        usb_put_function_instance(fi_ecm);
+#endif
+        return 0;
+}
+
+
+/****************************** Some noise ******************************/
+
+
+static __refdata struct usb_composite_driver multi_driver = {
+        .name           = "g_multi",
+        .dev            = &device_desc,
+        .strings        = dev_strings,
+        .max_speed      = USB_SPEED_HIGH,
+        .bind           = multi_bind,
+        .unbind         = __exit_p(multi_unbind),
+        .needs_serial   = 1,
+};
+
+module_usb_composite_driver(multi_driver);