drivers/usb/gadget/nokia.c

   1 /*
   2  * nokia.c -- Nokia Composite Gadget Driver
   3  *
   4  * Copyright (C) 2008-2010 Nokia Corporation
   5  * Contact: Felipe Balbi <felipe.balbi@nokia.com>
   6  *
   7  * This gadget driver borrows from serial.c which is:
   8  *
   9  * Copyright (C) 2003 Al Borchers (alborchers@steinerpoint.com)
  10  * Copyright (C) 2008 by David Brownell
  11  * Copyright (C) 2008 by Nokia Corporation
  12  *
  13  * This software is distributed under the terms of the GNU General
  14  * Public License ("GPL") as published by the Free Software Foundation,
  15  * version 2 of that License.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/device.h>
  20
  21 #include "u_serial.h"
  22 #include "u_ether.h"
  23 #include "u_phonet.h"
  24 #include "gadget_chips.h"
  25
  26 /* Defines */
  27
  28 #define NOKIA_VERSION_NUM               0x0211
  29 #define NOKIA_LONG_NAME                 "N900 (PC-Suite Mode)"
  30
  31 /*-------------------------------------------------------------------------*/
  32
  33 /*
  34  * Kbuild is not very cooperative with respect to linking separately
  35  * compiled library objects into one module.  So for now we won't use
  36  * separate compilation ... ensuring init/exit sections work to shrink
  37  * the runtime footprint, and giving us at least some parts of what
  38  * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
  39  */
  40 #define USB_FACM_INCLUDED
  41 #include "f_acm.c"
  42 #include "f_ecm.c"
  43 #include "f_obex.c"
  44 #include "f_serial.c"
  45 #include "f_phonet.c"
  46 #include "u_ether.c"
  47
  48 /*-------------------------------------------------------------------------*/
  49 USB_GADGET_COMPOSITE_OPTIONS();
  50
  51 #define NOKIA_VENDOR_ID                 0x0421  /* Nokia */
  52 #define NOKIA_PRODUCT_ID                0x01c8  /* Nokia Gadget */
  53
  54 /* string IDs are assigned dynamically */
  55
  56 #define STRING_DESCRIPTION_IDX          USB_GADGET_FIRST_AVAIL_IDX
  57
  58 static char manufacturer_nokia[] = "Nokia";
  59 static const char product_nokia[] = NOKIA_LONG_NAME;
  60 static const char description_nokia[] = "PC-Suite Configuration";
  61
  62 static struct usb_string strings_dev[] = {
  63         [USB_GADGET_MANUFACTURER_IDX].s = manufacturer_nokia,
  64         [USB_GADGET_PRODUCT_IDX].s = NOKIA_LONG_NAME,
  65         [USB_GADGET_SERIAL_IDX].s = "",
  66         [STRING_DESCRIPTION_IDX].s = description_nokia,
  67         {  } /* end of list */
  68 };
  69
  70 static struct usb_gadget_strings stringtab_dev = {
  71         .language       = 0x0409,       /* en-us */
  72         .strings        = strings_dev,
  73 };
  74
  75 static struct usb_gadget_strings *dev_strings[] = {
  76         &stringtab_dev,
  77         NULL,
  78 };
  79
  80 static struct usb_device_descriptor device_desc = {
  81         .bLength                = USB_DT_DEVICE_SIZE,
  82         .bDescriptorType        = USB_DT_DEVICE,
  83         .bcdUSB                 = __constant_cpu_to_le16(0x0200),
  84         .bDeviceClass           = USB_CLASS_COMM,
  85         .idVendor               = __constant_cpu_to_le16(NOKIA_VENDOR_ID),
  86         .idProduct              = __constant_cpu_to_le16(NOKIA_PRODUCT_ID),
  87         .bcdDevice              = cpu_to_le16(NOKIA_VERSION_NUM),
  88         /* .iManufacturer = DYNAMIC */
  89         /* .iProduct = DYNAMIC */
  90         .bNumConfigurations =   1,
  91 };
  92
  93 /*-------------------------------------------------------------------------*/
  94
  95 /* Module */
  96 MODULE_DESCRIPTION("Nokia composite gadget driver for N900");
  97 MODULE_AUTHOR("Felipe Balbi");
  98 MODULE_LICENSE("GPL");
  99
 100 /*-------------------------------------------------------------------------*/
 101
 102 static u8 hostaddr[ETH_ALEN];
 103
 104 enum {
 105         TTY_PORT_OBEX0,
 106         TTY_PORT_OBEX1,
 107         TTY_PORT_ACM,
 108         TTY_PORTS_MAX,
 109 };
 110
 111 static unsigned char tty_lines[TTY_PORTS_MAX];
 112
 113 static int __init nokia_bind_config(struct usb_configuration *c)
 114 {
 115         int status = 0;
 116
 117         status = phonet_bind_config(c);
 118         if (status)
 119                 printk(KERN_DEBUG "could not bind phonet config\n");
 120
 121         status = obex_bind_config(c, tty_lines[TTY_PORT_OBEX0]);
 122         if (status)
 123                 printk(KERN_DEBUG "could not bind obex config %d\n", 0);
 124
 125         status = obex_bind_config(c, tty_lines[TTY_PORT_OBEX1]);
 126         if (status)
 127                 printk(KERN_DEBUG "could not bind obex config %d\n", 0);
 128
 129         status = acm_bind_config(c, tty_lines[TTY_PORT_ACM]);
 130         if (status)
 131                 printk(KERN_DEBUG "could not bind acm config\n");
 132
 133         status = ecm_bind_config(c, hostaddr);
 134         if (status)
 135                 printk(KERN_DEBUG "could not bind ecm config\n");
 136
 137         return status;
 138 }
 139
 140 static struct usb_configuration nokia_config_500ma_driver = {
 141         .label          = "Bus Powered",
 142         .bConfigurationValue = 1,
 143         /* .iConfiguration = DYNAMIC */
 144         .bmAttributes   = USB_CONFIG_ATT_ONE,
 145         .MaxPower       = 500,
 146 };
 147
 148 static struct usb_configuration nokia_config_100ma_driver = {
 149         .label          = "Self Powered",
 150         .bConfigurationValue = 2,
 151         /* .iConfiguration = DYNAMIC */
 152         .bmAttributes   = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER,
 153         .MaxPower       = 100,
 154 };
 155
 156 static int __init nokia_bind(struct usb_composite_dev *cdev)
 157 {
 158         struct usb_gadget       *gadget = cdev->gadget;
 159         int                     status;
 160         int                     cur_line;
 161
 162         status = gphonet_setup(cdev->gadget);
 163         if (status < 0)
 164                 goto err_phonet;
 165
 166         for (cur_line = 0; cur_line < TTY_PORTS_MAX; cur_line++) {
 167                 status = gserial_alloc_line(&tty_lines[cur_line]);
 168                 if (status)
 169                         goto err_ether;
 170         }
 171
 172         status = gether_setup(cdev->gadget, hostaddr);
 173         if (status < 0)
 174                 goto err_ether;
 175
 176         status = usb_string_ids_tab(cdev, strings_dev);
 177         if (status < 0)
 178                 goto err_usb;
 179         device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id;
 180         device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id;
 181         status = strings_dev[STRING_DESCRIPTION_IDX].id;
 182         nokia_config_500ma_driver.iConfiguration = status;
 183         nokia_config_100ma_driver.iConfiguration = status;
 184
 185         if (!gadget_supports_altsettings(gadget))
 186                 goto err_usb;
 187
 188         /* finally register the configuration */
 189         status = usb_add_config(cdev, &nokia_config_500ma_driver,
 190                         nokia_bind_config);
 191         if (status < 0)
 192                 goto err_usb;
 193
 194         status = usb_add_config(cdev, &nokia_config_100ma_driver,
 195                         nokia_bind_config);
 196         if (status < 0)
 197                 goto err_usb;
 198
 199         usb_composite_overwrite_options(cdev, &coverwrite);
 200         dev_info(&gadget->dev, "%s\n", NOKIA_LONG_NAME);
 201
 202         return 0;
 203
 204 err_usb:
 205         gether_cleanup();
 206 err_ether:
 207         cur_line--;
 208         while (cur_line >= 0)
 209                 gserial_free_line(tty_lines[cur_line--]);
 210
 211         gphonet_cleanup();
 212 err_phonet:
 213         return status;
 214 }
 215
 216 static int __exit nokia_unbind(struct usb_composite_dev *cdev)
 217 {
 218         int i;
 219
 220         gphonet_cleanup();
 221
 222         for (i = 0; i < TTY_PORTS_MAX; i++)
 223                 gserial_free_line(tty_lines[i]);
 224
 225         gether_cleanup();
 226
 227         return 0;
 228 }
 229
 230 static __refdata struct usb_composite_driver nokia_driver = {
 231         .name           = "g_nokia",
 232         .dev            = &device_desc,
 233         .strings        = dev_strings,
 234         .max_speed      = USB_SPEED_HIGH,
 235         .bind           = nokia_bind,
 236         .unbind         = __exit_p(nokia_unbind),
 237 };
 238
 239 static int __init nokia_init(void)
 240 {
 241         return usb_composite_probe(&nokia_driver);
 242 }
 243 module_init(nokia_init);
 244
 245 static void __exit nokia_cleanup(void)
 246 {
 247         usb_composite_unregister(&nokia_driver);
 248 }
 249 module_exit(nokia_cleanup);
 250