USB: gadget: introduce g_nokia gadget driver

g_nokia is the gadget driver implementing
WMCDC Wireless Handset Control Model for the N900
device.

Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 271 insertions, 0 deletions

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index ee411206c699..7460cd797f45 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -812,6 +812,16 @@ config USB_CDC_COMPOSITE
           Say "y" to link the driver statically, or "m" to build a
           dynamically linked module.
 
+config USB_G_NOKIA
+        tristate "Nokia composite gadget"
+        depends on PHONET
+        help
+          The Nokia composite gadget provides support for acm, obex
+          and phonet in only one composite gadget driver.
+
+          It's only really useful for N900 hardware. If you're building
+          a kernel for N900, say Y or M here. If unsure, say N.
+
 config USB_G_MULTI
         tristate "Multifunction Composite Gadget (EXPERIMENTAL)"
         depends on BLOCK && NET
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 2e2c047262b7..43b51da8d727 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -43,6 +43,7 @@ g_mass_storage-objs		:= mass_storage.o
 g_printer-objs                  := printer.o
 g_cdc-objs                      := cdc2.o
 g_multi-objs                    := multi.o
+g_nokia-objs                    := nokia.o
 
 obj-$(CONFIG_USB_ZERO)          += g_zero.o
 obj-$(CONFIG_USB_AUDIO)         += g_audio.o
@@ -55,4 +56,5 @@ obj-$(CONFIG_USB_G_PRINTER)	+= g_printer.o
 obj-$(CONFIG_USB_MIDI_GADGET)   += g_midi.o
 obj-$(CONFIG_USB_CDC_COMPOSITE) += g_cdc.o
 obj-$(CONFIG_USB_G_MULTI)       += g_multi.o
+obj-$(CONFIG_USB_G_NOKIA)       += g_nokia.o
 
diff --git a/drivers/usb/gadget/nokia.c b/drivers/usb/gadget/nokia.c
new file mode 100644
index 000000000000..7d6b66a85724
--- /dev/null
+++ b/drivers/usb/gadget/nokia.c
@@ -0,0 +1,259 @@
+/*
+ * nokia.c -- Nokia Composite Gadget Driver
+ *
+ * Copyright (C) 2008-2010 Nokia Corporation
+ * Contact: Felipe Balbi <felipe.balbi@nokia.com>
+ *
+ * This gadget driver borrows from serial.c which is:
+ *
+ * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)
+ * Copyright (C) 2008 by David Brownell
+ * Copyright (C) 2008 by Nokia Corporation
+ *
+ * This software is distributed under the terms of the GNU General
+ * Public License ("GPL") as published by the Free Software Foundation,
+ * version 2 of that License.
+ */
+
+#include <linux/kernel.h>
+#include <linux/utsname.h>
+#include <linux/device.h>
+
+#include "u_serial.h"
+#include "u_ether.h"
+#include "u_phonet.h"
+#include "gadget_chips.h"
+
+/* Defines */
+
+#define NOKIA_VERSION_NUM               0x0211
+#define NOKIA_LONG_NAME                 "N900 (PC-Suite Mode)"
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * 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_obex.c"
+#include "f_serial.c"
+#include "f_phonet.c"
+#include "u_ether.c"
+
+/*-------------------------------------------------------------------------*/
+
+#define NOKIA_VENDOR_ID                 0x0421  /* Nokia */
+#define NOKIA_PRODUCT_ID                0x01c8  /* Nokia Gadget */
+
+/* string IDs are assigned dynamically */
+
+#define STRING_MANUFACTURER_IDX         0
+#define STRING_PRODUCT_IDX              1
+#define STRING_DESCRIPTION_IDX          2
+
+static char manufacturer_nokia[] = "Nokia";
+static const char product_nokia[] = NOKIA_LONG_NAME;
+static const char description_nokia[] = "PC-Suite Configuration";
+
+static struct usb_string strings_dev[] = {
+        [STRING_MANUFACTURER_IDX].s = manufacturer_nokia,
+        [STRING_PRODUCT_IDX].s = NOKIA_LONG_NAME,
+        [STRING_DESCRIPTION_IDX].s = description_nokia,
+        {  } /* 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 struct usb_device_descriptor device_desc = {
+        .bLength                = USB_DT_DEVICE_SIZE,
+        .bDescriptorType        = USB_DT_DEVICE,
+        .bcdUSB                 = __constant_cpu_to_le16(0x0200),
+        .bDeviceClass           = USB_CLASS_COMM,
+        .idVendor               = __constant_cpu_to_le16(NOKIA_VENDOR_ID),
+        .idProduct              = __constant_cpu_to_le16(NOKIA_PRODUCT_ID),
+        /* .iManufacturer = DYNAMIC */
+        /* .iProduct = DYNAMIC */
+        .bNumConfigurations =   1,
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* Module */
+MODULE_DESCRIPTION("Nokia composite gadget driver for N900");
+MODULE_AUTHOR("Felipe Balbi");
+MODULE_LICENSE("GPL");
+
+/*-------------------------------------------------------------------------*/
+
+static u8 hostaddr[ETH_ALEN];
+
+static int __init nokia_bind_config(struct usb_configuration *c)
+{
+        int status = 0;
+
+        status = phonet_bind_config(c);
+        if (status)
+                printk(KERN_DEBUG "could not bind phonet config\n");
+
+        status = obex_bind_config(c, 0);
+        if (status)
+                printk(KERN_DEBUG "could not bind obex config %d\n", 0);
+
+        status = obex_bind_config(c, 1);
+        if (status)
+                printk(KERN_DEBUG "could not bind obex config %d\n", 0);
+
+        status = acm_bind_config(c, 2);
+        if (status)
+                printk(KERN_DEBUG "could not bind acm config\n");
+
+        status = ecm_bind_config(c, hostaddr);
+        if (status)
+                printk(KERN_DEBUG "could not bind ecm config\n");
+
+        return status;
+}
+
+static struct usb_configuration nokia_config_500ma_driver = {
+        .label          = "Bus Powered",
+        .bind           = nokia_bind_config,
+        .bConfigurationValue = 1,
+        /* .iConfiguration = DYNAMIC */
+        .bmAttributes   = USB_CONFIG_ATT_ONE,
+        .bMaxPower      = 250, /* 500mA */
+};
+
+static struct usb_configuration nokia_config_100ma_driver = {
+        .label          = "Self Powered",
+        .bind           = nokia_bind_config,
+        .bConfigurationValue = 2,
+        /* .iConfiguration = DYNAMIC */
+        .bmAttributes   = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
+        .bMaxPower      = 50, /* 100 mA */
+};
+
+static int __init nokia_bind(struct usb_composite_dev *cdev)
+{
+        int                     gcnum;
+        struct usb_gadget       *gadget = cdev->gadget;
+        int                     status;
+
+        status = gphonet_setup(cdev->gadget);
+        if (status < 0)
+                goto err_phonet;
+
+        status = gserial_setup(cdev->gadget, 3);
+        if (status < 0)
+                goto err_serial;
+
+        status = gether_setup(cdev->gadget, hostaddr);
+        if (status < 0)
+                goto err_ether;
+
+        status = usb_string_id(cdev);
+        if (status < 0)
+                goto err_usb;
+        strings_dev[STRING_MANUFACTURER_IDX].id = status;
+
+        device_desc.iManufacturer = status;
+
+        status = usb_string_id(cdev);
+        if (status < 0)
+                goto err_usb;
+        strings_dev[STRING_PRODUCT_IDX].id = status;
+
+        device_desc.iProduct = status;
+
+        /* config description */
+        status = usb_string_id(cdev);
+        if (status < 0)
+                goto err_usb;
+        strings_dev[STRING_DESCRIPTION_IDX].id = status;
+
+        nokia_config_500ma_driver.iConfiguration = status;
+        nokia_config_100ma_driver.iConfiguration = status;
+
+        /* set up other descriptors */
+        gcnum = usb_gadget_controller_number(gadget);
+        if (gcnum >= 0)
+                device_desc.bcdDevice = cpu_to_le16(NOKIA_VERSION_NUM);
+        else {
+                /* this should only work with hw that supports altsettings
+                 * and several endpoints, anything else, panic.
+                 */
+                pr_err("nokia_bind: controller '%s' not recognized\n",
+                        gadget->name);
+                goto err_usb;
+        }
+
+        /* finaly register the configuration */
+        status = usb_add_config(cdev, &nokia_config_500ma_driver);
+        if (status < 0)
+                goto err_usb;
+
+        status = usb_add_config(cdev, &nokia_config_100ma_driver);
+        if (status < 0)
+                goto err_usb;
+
+        dev_info(&gadget->dev, "%s\n", NOKIA_LONG_NAME);
+
+        return 0;
+
+err_usb:
+        gether_cleanup();
+err_ether:
+        gserial_cleanup();
+err_serial:
+        gphonet_cleanup();
+err_phonet:
+        return status;
+}
+
+static int __exit nokia_unbind(struct usb_composite_dev *cdev)
+{
+        gphonet_cleanup();
+        gserial_cleanup();
+        gether_cleanup();
+
+        return 0;
+}
+
+static struct usb_composite_driver nokia_driver = {
+        .name           = "g_nokia",
+        .dev            = &device_desc,
+        .strings        = dev_strings,
+        .bind           = nokia_bind,
+        .unbind         = __exit_p(nokia_unbind),
+};
+
+static int __init nokia_init(void)
+{
+        return usb_composite_register(&nokia_driver);
+}
+module_init(nokia_init);
+
+static void __exit nokia_cleanup(void)
+{
+        usb_composite_unregister(&nokia_driver);
+}
+module_exit(nokia_cleanup);
+