/*
 * 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",
        .bConfigurationValue = 1,
        /* .iConfiguration = DYNAMIC */
        .bmAttributes   = USB_CONFIG_ATT_ONE,
        .bMaxPower      = 250, /* 500mA */
};

static struct usb_configuration nokia_config_100ma_driver = {
        .label          = "Self Powered",
        .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;
        }

        /* finally register the configuration */
        status = usb_add_config(cdev, &nokia_config_500ma_driver,
                        nokia_bind_config);
        if (status < 0)
                goto err_usb;

        status = usb_add_config(cdev, &nokia_config_100ma_driver,
                        nokia_bind_config);
        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,
        .max_speed      = USB_SPEED_HIGH,
        .unbind         = __exit_p(nokia_unbind),
};

static int __init nokia_init(void)
{
        return usb_composite_probe(&nokia_driver, nokia_bind);
}
module_init(nokia_init);

static void __exit nokia_cleanup(void)
{
        usb_composite_unregister(&nokia_driver);
}
module_exit(nokia_cleanup);