drivers/bluetooth/ath3k.c

   1 /*
   2  * Copyright (c) 2008-2009 Atheros Communications Inc.
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program; if not, write to the Free Software
  16  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  *
  18  */
  19
  20
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/init.h>
  24 #include <linux/slab.h>
  25 #include <linux/types.h>
  26 #include <linux/errno.h>
  27 #include <linux/device.h>
  28 #include <linux/firmware.h>
  29 #include <linux/usb.h>
  30 #include <net/bluetooth/bluetooth.h>
  31
  32 #define VERSION "1.0"
  33
  34
  35 static struct usb_device_id ath3k_table[] = {
  36         /* Atheros AR3011 */
  37         { USB_DEVICE(0x0CF3, 0x3000) },
  38
  39         /* Atheros AR3011 with sflash firmware*/
  40         { USB_DEVICE(0x0CF3, 0x3002) },
  41
  42         { }     /* Terminating entry */
  43 };
  44
  45 MODULE_DEVICE_TABLE(usb, ath3k_table);
  46
  47 #define USB_REQ_DFU_DNLOAD      1
  48 #define BULK_SIZE               4096
  49
  50 static int ath3k_load_firmware(struct usb_device *udev,
  51                                 const struct firmware *firmware)
  52 {
  53         u8 *send_buf;
  54         int err, pipe, len, size, sent = 0;
  55         int count = firmware->size;
  56
  57         BT_DBG("udev %p", udev);
  58
  59         pipe = usb_sndctrlpipe(udev, 0);
  60
  61         send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
  62         if (!send_buf) {
  63                 BT_ERR("Can't allocate memory chunk for firmware");
  64                 return -ENOMEM;
  65         }
  66
  67         memcpy(send_buf, firmware->data, 20);
  68         if ((err = usb_control_msg(udev, pipe,
  69                                 USB_REQ_DFU_DNLOAD,
  70                                 USB_TYPE_VENDOR, 0, 0,
  71                                 send_buf, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
  72                 BT_ERR("Can't change to loading configuration err");
  73                 goto error;
  74         }
  75         sent += 20;
  76         count -= 20;
  77
  78         while (count) {
  79                 size = min_t(uint, count, BULK_SIZE);
  80                 pipe = usb_sndbulkpipe(udev, 0x02);
  81                 memcpy(send_buf, firmware->data + sent, size);
  82
  83                 err = usb_bulk_msg(udev, pipe, send_buf, size,
  84                                         &len, 3000);
  85
  86                 if (err || (len != size)) {
  87                         BT_ERR("Error in firmware loading err = %d,"
  88                                 "len = %d, size = %d", err, len, size);
  89                         goto error;
  90                 }
  91
  92                 sent  += size;
  93                 count -= size;
  94         }
  95
  96         kfree(send_buf);
  97         return 0;
  98
  99 error:
 100         kfree(send_buf);
 101         return err;
 102 }
 103
 104 static int ath3k_probe(struct usb_interface *intf,
 105                         const struct usb_device_id *id)
 106 {
 107         const struct firmware *firmware;
 108         struct usb_device *udev = interface_to_usbdev(intf);
 109
 110         BT_DBG("intf %p id %p", intf, id);
 111
 112         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 113                 return -ENODEV;
 114
 115         if (request_firmware(&firmware, "ath3k-1.fw", &udev->dev) < 0) {
 116                 return -EIO;
 117         }
 118
 119         if (ath3k_load_firmware(udev, firmware)) {
 120                 release_firmware(firmware);
 121                 return -EIO;
 122         }
 123         release_firmware(firmware);
 124
 125         return 0;
 126 }
 127
 128 static void ath3k_disconnect(struct usb_interface *intf)
 129 {
 130         BT_DBG("ath3k_disconnect intf %p", intf);
 131 }
 132
 133 static struct usb_driver ath3k_driver = {
 134         .name           = "ath3k",
 135         .probe          = ath3k_probe,
 136         .disconnect     = ath3k_disconnect,
 137         .id_table       = ath3k_table,
 138 };
 139
 140 static int __init ath3k_init(void)
 141 {
 142         BT_INFO("Atheros AR30xx firmware driver ver %s", VERSION);
 143         return usb_register(&ath3k_driver);
 144 }
 145
 146 static void __exit ath3k_exit(void)
 147 {
 148         usb_deregister(&ath3k_driver);
 149 }
 150
 151 module_init(ath3k_init);
 152 module_exit(ath3k_exit);
 153
 154 MODULE_AUTHOR("Atheros Communications");
 155 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
 156 MODULE_VERSION(VERSION);
 157 MODULE_LICENSE("GPL");
 158 MODULE_FIRMWARE("ath3k-1.fw");