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Diffstat (limited to 'drivers/usb/gadget/multi.c')
-rw-r--r--drivers/usb/gadget/multi.c358
1 files changed, 358 insertions, 0 deletions
diff --git a/drivers/usb/gadget/multi.c b/drivers/usb/gadget/multi.c
new file mode 100644
index 000000000000..429560100b10
--- /dev/null
+++ b/drivers/usb/gadget/multi.c
@@ -0,0 +1,358 @@
+/*
+ * multi.c -- Multifunction Composite driver
+ *
+ * Copyright (C) 2008 David Brownell
+ * Copyright (C) 2008 Nokia Corporation
+ * Copyright (C) 2009 Samsung Electronics
+ * Author: Michal Nazarewicz (m.nazarewicz@samsung.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/utsname.h>
+
+
+#if defined USB_ETH_RNDIS
+# undef USB_ETH_RNDIS
+#endif
+#ifdef CONFIG_USB_ETH_RNDIS
+# define USB_ETH_RNDIS y
+#endif
+
+
+#define DRIVER_DESC "Multifunction Composite Gadget"
+#define DRIVER_VERSION "2009/07/21"
+
+/*-------------------------------------------------------------------------*/
+
+#define MULTI_VENDOR_NUM 0x0525 /* XXX NetChip */
+#define MULTI_PRODUCT_NUM 0xa4ab /* XXX */
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * 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 "u_serial.c"
+#include "f_acm.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"
+
+#undef DBG /* u_ether.c has broken idea about macros */
+#undef VDBG /* so clean up after it */
+#undef ERROR
+#undef INFO
+#include "f_mass_storage.c"
+
+/*-------------------------------------------------------------------------*/
+
+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(MULTI_VENDOR_NUM),
+ .idProduct = cpu_to_le16(MULTI_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,
+};
+
+static u8 hostaddr[ETH_ALEN];
+
+
+
+/****************************** Configurations ******************************/
+
+static struct fsg_module_parameters mod_data = {
+ .stall = 1
+};
+FSG_MODULE_PARAMETERS(/* no prefix */, mod_data);
+
+static struct fsg_common *fsg_common;
+
+
+#ifdef USB_ETH_RNDIS
+
+static int __init 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);
+ if (ret < 0)
+ return ret;
+
+ ret = acm_bind_config(c, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = fsg_add(c->cdev, c, fsg_common);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static struct usb_configuration rndis_config_driver = {
+ .label = "Multifunction Composite (RNDIS + MS + ACM)",
+ .bind = rndis_do_config,
+ .bConfigurationValue = 2,
+ /* .iConfiguration = DYNAMIC */
+ .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
+};
+
+#endif
+
+#ifdef CONFIG_USB_G_MULTI_CDC
+
+static int __init 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);
+ if (ret < 0)
+ return ret;
+
+ ret = acm_bind_config(c, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = fsg_add(c->cdev, c, fsg_common);
+ if (ret < 0)
+ return ret;
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static struct usb_configuration cdc_config_driver = {
+ .label = "Multifunction Composite (CDC + MS + ACM)",
+ .bind = cdc_do_config,
+ .bConfigurationValue = 1,
+ /* .iConfiguration = DYNAMIC */
+ .bmAttributes = USB_CONFIG_ATT_SELFPOWER,
+};
+
+#endif
+
+
+
+/****************************** Gadget Bind ******************************/
+
+
+static int __init multi_bind(struct usb_composite_dev *cdev)
+{
+ struct usb_gadget *gadget = cdev->gadget;
+ int status, gcnum;
+
+ if (!can_support_ecm(cdev->gadget)) {
+ dev_err(&gadget->dev, "controller '%s' not usable\n",
+ gadget->name);
+ return -EINVAL;
+ }
+
+ /* set up network link layer */
+ status = gether_setup(cdev->gadget, hostaddr);
+ if (status < 0)
+ return status;
+
+ /* set up serial link layer */
+ status = gserial_setup(cdev->gadget, 1);
+ if (status < 0)
+ goto fail0;
+
+ /* set up mass storage function */
+ fsg_common = fsg_common_from_params(0, cdev, &mod_data);
+ if (IS_ERR(fsg_common)) {
+ status = PTR_ERR(fsg_common);
+ goto fail1;
+ }
+
+
+ gcnum = usb_gadget_controller_number(gadget);
+ if (gcnum >= 0)
+ device_desc.bcdDevice = cpu_to_le16(0x0300 | gcnum);
+ else {
+ /* We assume that can_support_ecm() tells the truth;
+ * but if the controller isn't recognized at all then
+ * that assumption is a bit more likely to be wrong.
+ */
+ WARNING(cdev, "controller '%s' not recognized\n",
+ gadget->name);
+ 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)
+ goto fail2;
+ strings_dev[STRING_MANUFACTURER_IDX].id = status;
+ device_desc.iManufacturer = status;
+
+ status = usb_string_id(cdev);
+ if (status < 0)
+ goto fail2;
+ strings_dev[STRING_PRODUCT_IDX].id = status;
+ device_desc.iProduct = status;
+
+#ifdef USB_ETH_RNDIS
+ /* register our first configuration */
+ status = usb_add_config(cdev, &rndis_config_driver);
+ if (status < 0)
+ goto fail2;
+#endif
+
+#ifdef CONFIG_USB_G_MULTI_CDC
+ /* register our second configuration */
+ status = usb_add_config(cdev, &cdc_config_driver);
+ if (status < 0)
+ goto fail2;
+#endif
+
+ dev_info(&gadget->dev, DRIVER_DESC ", version: " DRIVER_VERSION "\n");
+ fsg_common_put(fsg_common);
+ return 0;
+
+fail2:
+ fsg_common_put(fsg_common);
+fail1:
+ gserial_cleanup();
+fail0:
+ gether_cleanup();
+ return status;
+}
+
+static int __exit multi_unbind(struct usb_composite_dev *cdev)
+{
+ gserial_cleanup();
+ gether_cleanup();
+ return 0;
+}
+
+
+/****************************** Some noise ******************************/
+
+
+static struct usb_composite_driver multi_driver = {
+ .name = "g_multi",
+ .dev = &device_desc,
+ .strings = dev_strings,
+ .bind = multi_bind,
+ .unbind = __exit_p(multi_unbind),
+};
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Michal Nazarewicz");
+MODULE_LICENSE("GPL");
+
+static int __init g_multi_init(void)
+{
+ return usb_composite_register(&multi_driver);
+}
+module_init(g_multi_init);
+
+static void __exit g_multi_cleanup(void)
+{
+ usb_composite_unregister(&multi_driver);
+}
+module_exit(g_multi_cleanup);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.