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         /* Atheros AR9285 Malbec with sflash firmware */
  43         { USB_DEVICE(0x03F0, 0x311D) },
  44         { }     /* Terminating entry */
  45 };
  46
  47 MODULE_DEVICE_TABLE(usb, ath3k_table);
  48
  49 #define USB_REQ_DFU_DNLOAD      1
  50 #define BULK_SIZE               4096
  51
  52 static int ath3k_load_firmware(struct usb_device *udev,
  53                                 const struct firmware *firmware)
  54 {
  55         u8 *send_buf;
  56         int err, pipe, len, size, sent = 0;
  57         int count = firmware->size;
  58
  59         BT_DBG("udev %p", udev);
  60
  61         pipe = usb_sndctrlpipe(udev, 0);
  62
  63         send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
  64         if (!send_buf) {
  65                 BT_ERR("Can't allocate memory chunk for firmware");
  66                 return -ENOMEM;
  67         }
  68
  69         memcpy(send_buf, firmware->data, 20);
  70         if ((err = usb_control_msg(udev, pipe,
  71                                 USB_REQ_DFU_DNLOAD,
  72                                 USB_TYPE_VENDOR, 0, 0,
  73                                 send_buf, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
  74                 BT_ERR("Can't change to loading configuration err");
  75                 goto error;
  76         }
  77         sent += 20;
  78         count -= 20;
  79
  80         while (count) {
  81                 size = min_t(uint, count, BULK_SIZE);
  82                 pipe = usb_sndbulkpipe(udev, 0x02);
  83                 memcpy(send_buf, firmware->data + sent, size);
  84
  85                 err = usb_bulk_msg(udev, pipe, send_buf, size,
  86                                         &len, 3000);
  87
  88                 if (err || (len != size)) {
  89                         BT_ERR("Error in firmware loading err = %d,"
  90                                 "len = %d, size = %d", err, len, size);
  91                         goto error;
  92                 }
  93
  94                 sent  += size;
  95                 count -= size;
  96         }
  97
  98         kfree(send_buf);
  99         return 0;
 100
 101 error:
 102         kfree(send_buf);
 103         return err;
 104 }
 105
 106 static int ath3k_probe(struct usb_interface *intf,
 107                         const struct usb_device_id *id)
 108 {
 109         const struct firmware *firmware;
 110         struct usb_device *udev = interface_to_usbdev(intf);
 111
 112         BT_DBG("intf %p id %p", intf, id);
 113
 114         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 115                 return -ENODEV;
 116
 117         if (request_firmware(&firmware, "ath3k-1.fw", &udev->dev) < 0) {
 118                 return -EIO;
 119         }
 120
 121         if (ath3k_load_firmware(udev, firmware)) {
 122                 release_firmware(firmware);
 123                 return -EIO;
 124         }
 125         release_firmware(firmware);
 126
 127         return 0;
 128 }
 129
 130 static void ath3k_disconnect(struct usb_interface *intf)
 131 {
 132         BT_DBG("ath3k_disconnect intf %p", intf);
 133 }
 134
 135 static struct usb_driver ath3k_driver = {
 136         .name           = "ath3k",
 137         .probe          = ath3k_probe,
 138         .disconnect     = ath3k_disconnect,
 139         .id_table       = ath3k_table,
 140 };
 141
 142 static int __init ath3k_init(void)
 143 {
 144         BT_INFO("Atheros AR30xx firmware driver ver %s", VERSION);
 145         return usb_register(&ath3k_driver);
 146 }
 147
 148 static void __exit ath3k_exit(void)
 149 {
 150         usb_deregister(&ath3k_driver);
 151 }
 152
 153 module_init(ath3k_init);
 154 module_exit(ath3k_exit);
 155
 156 MODULE_AUTHOR("Atheros Communications");
 157 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
 158 MODULE_VERSION(VERSION);
 159 MODULE_LICENSE("GPL");
 160 MODULE_FIRMWARE("ath3k-1.fw");