Initial file dump from open source releaseHEADmaster

1 files changed, 374 insertions, 0 deletions

diff --git a/drivers/usb/gadget/multi.c b/drivers/usb/gadget/multi.c
new file mode 100644
index 00000000..4a45e80c
--- /dev/null
+++ b/drivers/usb/gadget/multi.c
@@ -0,0 +1,374 @@
+/*
+ * 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 "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");
+
+
+/***************************** All the files... *****************************/
+
+/*
+ * 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 "f_mass_storage.c"
+
+#include "f_ecm.c"
+#include "f_subset.c"
+#ifdef USB_ETH_RNDIS
+#  include "f_rndis.c"
+#  include "rndis.c"
+#endif
+#include "u_ether.c"
+
+USB_GADGET_COMPOSITE_OPTIONS();
+
+/***************************** 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 };
+FSG_MODULE_PARAMETERS(/* no prefix */, fsg_mod_data);
+
+static struct fsg_common fsg_common;
+
+static u8 hostaddr[ETH_ALEN];
+
+static struct usb_function_instance *fi_acm;
+static struct eth_dev *the_dev;
+
+/********** RNDIS **********/
+
+#ifdef USB_ETH_RNDIS
+static struct usb_function *f_acm_rndis;
+
+static __init int rndis_do_config(struct usb_configuration *c)
+{
+	int ret;
+
+	if (gadget_is_otg(c->cdev->gadget)) {
+		c->descriptors = otg_desc;
+		c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+	}
+
+	ret = rndis_bind_config(c, hostaddr, the_dev);
+	if (ret < 0)
+		return ret;
+
+	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;
+
+	ret = fsg_bind_config(c->cdev, c, &fsg_common);
+	if (ret < 0)
+		goto err_fsg;
+
+	return 0;
+err_fsg:
+	usb_remove_function(c, f_acm_rndis);
+err_conf:
+	usb_put_function(f_acm_rndis);
+err_func_acm:
+	return ret;
+}
+
+static 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 int rndis_config_register(struct usb_composite_dev *cdev)
+{
+	return 0;
+}
+
+#endif
+
+
+/********** CDC ECM **********/
+
+#ifdef CONFIG_USB_G_MULTI_CDC
+static struct usb_function *f_acm_multi;
+
+static __init int cdc_do_config(struct usb_configuration *c)
+{
+	int ret;
+
+	if (gadget_is_otg(c->cdev->gadget)) {
+		c->descriptors = otg_desc;
+		c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
+	}
+
+	ret = ecm_bind_config(c, hostaddr, the_dev);
+	if (ret < 0)
+		return ret;
+
+	/* implicit port_num is zero */
+	f_acm_multi = usb_get_function(fi_acm);
+	if (IS_ERR(f_acm_multi))
+		goto err_func_acm;
+
+	ret = usb_add_function(c, f_acm_multi);
+	if (ret)
+		goto err_conf;
+
+	ret = fsg_bind_config(c->cdev, c, &fsg_common);
+	if (ret < 0)
+		goto err_fsg;
+
+	return 0;
+err_fsg:
+	usb_remove_function(c, f_acm_multi);
+err_conf:
+	usb_put_function(f_acm_multi);
+err_func_acm:
+	return ret;
+}
+
+static 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 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;
+	int status;
+
+	if (!can_support_ecm(cdev->gadget)) {
+		dev_err(&gadget->dev, "controller '%s' not usable\n",
+		        gadget->name);
+		return -EINVAL;
+	}
+
+	/* set up network link layer */
+	the_dev = gether_setup(cdev->gadget, hostaddr);
+	if (IS_ERR(the_dev))
+		return PTR_ERR(the_dev);
+
+	/* 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 */
+	{
+		void *retp;
+		retp = fsg_common_from_params(&fsg_common, cdev, &fsg_mod_data);
+		if (IS_ERR(retp)) {
+			status = PTR_ERR(retp);
+			goto fail1;
+		}
+	}
+
+	/* allocate string IDs */
+	status = usb_string_ids_tab(cdev, strings_dev);
+	if (unlikely(status < 0))
+		goto fail2;
+	device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
+
+	/* register configurations */
+	status = rndis_config_register(cdev);
+	if (unlikely(status < 0))
+		goto fail2;
+
+	status = cdc_config_register(cdev);
+	if (unlikely(status < 0))
+		goto fail2;
+	usb_composite_overwrite_options(cdev, &coverwrite);
+
+	/* we're done */
+	dev_info(&gadget->dev, DRIVER_DESC "\n");
+	fsg_common_put(&fsg_common);
+	return 0;
+
+
+	/* error recovery */
+fail2:
+	fsg_common_put(&fsg_common);
+fail1:
+	usb_put_function_instance(fi_acm);
+fail0:
+	gether_cleanup(the_dev);
+	return status;
+}
+
+static int __exit multi_unbind(struct usb_composite_dev *cdev)
+{
+#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);
+	gether_cleanup(the_dev);
+	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,
+};
+
+
+static int __init multi_init(void)
+{
+	return usb_composite_probe(&multi_driver);
+}
+module_init(multi_init);
+
+static void __exit multi_exit(void)
+{
+	usb_composite_unregister(&multi_driver);
+}
+module_exit(multi_exit);