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 struct ath3k_data {
  51         struct usb_device *udev;
  52         u8 *fw_data;
  53         u32 fw_size;
  54         u32 fw_sent;
  55 };
  56
  57 static int ath3k_load_firmware(struct ath3k_data *data,
  58                                 unsigned char *firmware,
  59                                 int count)
  60 {
  61         u8 *send_buf;
  62         int err, pipe, len, size, sent = 0;
  63
  64         BT_DBG("ath3k %p udev %p", data, data->udev);
  65
  66         pipe = usb_sndctrlpipe(data->udev, 0);
  67
  68         if ((usb_control_msg(data->udev, pipe,
  69                                 USB_REQ_DFU_DNLOAD,
  70                                 USB_TYPE_VENDOR, 0, 0,
  71                                 firmware, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
  72                 BT_ERR("Can't change to loading configuration err");
  73                 return -EBUSY;
  74         }
  75         sent += 20;
  76         count -= 20;
  77
  78         send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
  79         if (!send_buf) {
  80                 BT_ERR("Can't allocate memory chunk for firmware");
  81                 return -ENOMEM;
  82         }
  83
  84         while (count) {
  85                 size = min_t(uint, count, BULK_SIZE);
  86                 pipe = usb_sndbulkpipe(data->udev, 0x02);
  87                 memcpy(send_buf, firmware + sent, size);
  88
  89                 err = usb_bulk_msg(data->udev, pipe, send_buf, size,
  90                                         &len, 3000);
  91
  92                 if (err || (len != size)) {
  93                         BT_ERR("Error in firmware loading err = %d,"
  94                                 "len = %d, size = %d", err, len, size);
  95                         goto error;
  96                 }
  97
  98                 sent  += size;
  99                 count -= size;
 100         }
 101
 102         kfree(send_buf);
 103         return 0;
 104
 105 error:
 106         kfree(send_buf);
 107         return err;
 108 }
 109
 110 static int ath3k_probe(struct usb_interface *intf,
 111                         const struct usb_device_id *id)
 112 {
 113         const struct firmware *firmware;
 114         struct usb_device *udev = interface_to_usbdev(intf);
 115         struct ath3k_data *data;
 116         int size;
 117
 118         BT_DBG("intf %p id %p", intf, id);
 119
 120         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 121                 return -ENODEV;
 122
 123         data = kzalloc(sizeof(*data), GFP_KERNEL);
 124         if (!data)
 125                 return -ENOMEM;
 126
 127         data->udev = udev;
 128
 129         if (request_firmware(&firmware, "ath3k-1.fw", &udev->dev) < 0) {
 130                 kfree(data);
 131                 return -EIO;
 132         }
 133
 134         size = max_t(uint, firmware->size, 4096);
 135         data->fw_data = kmalloc(size, GFP_KERNEL);
 136         if (!data->fw_data) {
 137                 release_firmware(firmware);
 138                 kfree(data);
 139                 return -ENOMEM;
 140         }
 141
 142         memcpy(data->fw_data, firmware->data, firmware->size);
 143         data->fw_size = firmware->size;
 144         data->fw_sent = 0;
 145         release_firmware(firmware);
 146
 147         usb_set_intfdata(intf, data);
 148         if (ath3k_load_firmware(data, data->fw_data, data->fw_size)) {
 149                 usb_set_intfdata(intf, NULL);
 150                 kfree(data->fw_data);
 151                 kfree(data);
 152                 return -EIO;
 153         }
 154
 155         return 0;
 156 }
 157
 158 static void ath3k_disconnect(struct usb_interface *intf)
 159 {
 160         struct ath3k_data *data = usb_get_intfdata(intf);
 161
 162         BT_DBG("ath3k_disconnect intf %p", intf);
 163
 164         kfree(data->fw_data);
 165         kfree(data);
 166 }
 167
 168 static struct usb_driver ath3k_driver = {
 169         .name           = "ath3k",
 170         .probe          = ath3k_probe,
 171         .disconnect     = ath3k_disconnect,
 172         .id_table       = ath3k_table,
 173 };
 174
 175 static int __init ath3k_init(void)
 176 {
 177         BT_INFO("Atheros AR30xx firmware driver ver %s", VERSION);
 178         return usb_register(&ath3k_driver);
 179 }
 180
 181 static void __exit ath3k_exit(void)
 182 {
 183         usb_deregister(&ath3k_driver);
 184 }
 185
 186 module_init(ath3k_init);
 187 module_exit(ath3k_exit);
 188
 189 MODULE_AUTHOR("Atheros Communications");
 190 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
 191 MODULE_VERSION(VERSION);
 192 MODULE_LICENSE("GPL");
 193 MODULE_FIRMWARE("ath3k-1.fw");