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         { }     /* Terminating entry */
  39 };
  40
  41 MODULE_DEVICE_TABLE(usb, ath3k_table);
  42
  43 #define USB_REQ_DFU_DNLOAD      1
  44 #define BULK_SIZE               4096
  45
  46 struct ath3k_data {
  47         struct usb_device *udev;
  48         u8 *fw_data;
  49         u32 fw_size;
  50         u32 fw_sent;
  51 };
  52
  53 static int ath3k_load_firmware(struct ath3k_data *data,
  54                                 unsigned char *firmware,
  55                                 int count)
  56 {
  57         u8 *send_buf;
  58         int err, pipe, len, size, sent = 0;
  59
  60         BT_DBG("ath3k %p udev %p", data, data->udev);
  61
  62         pipe = usb_sndctrlpipe(data->udev, 0);
  63
  64         if ((usb_control_msg(data->udev, pipe,
  65                                 USB_REQ_DFU_DNLOAD,
  66                                 USB_TYPE_VENDOR, 0, 0,
  67                                 firmware, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
  68                 BT_ERR("Can't change to loading configuration err");
  69                 return -EBUSY;
  70         }
  71         sent += 20;
  72         count -= 20;
  73
  74         send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
  75         if (!send_buf) {
  76                 BT_ERR("Can't allocate memory chunk for firmware");
  77                 return -ENOMEM;
  78         }
  79
  80         while (count) {
  81                 size = min_t(uint, count, BULK_SIZE);
  82                 pipe = usb_sndbulkpipe(data->udev, 0x02);
  83                 memcpy(send_buf, firmware + sent, size);
  84
  85                 err = usb_bulk_msg(data->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         struct ath3k_data *data;
 112         int size;
 113
 114         BT_DBG("intf %p id %p", intf, id);
 115
 116         if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 117                 return -ENODEV;
 118
 119         data = kzalloc(sizeof(*data), GFP_KERNEL);
 120         if (!data)
 121                 return -ENOMEM;
 122
 123         data->udev = udev;
 124
 125         if (request_firmware(&firmware, "ath3k-1.fw", &udev->dev) < 0) {
 126                 kfree(data);
 127                 return -EIO;
 128         }
 129
 130         size = max_t(uint, firmware->size, 4096);
 131         data->fw_data = kmalloc(size, GFP_KERNEL);
 132         if (!data->fw_data) {
 133                 release_firmware(firmware);
 134                 kfree(data);
 135                 return -ENOMEM;
 136         }
 137
 138         memcpy(data->fw_data, firmware->data, firmware->size);
 139         data->fw_size = firmware->size;
 140         data->fw_sent = 0;
 141         release_firmware(firmware);
 142
 143         usb_set_intfdata(intf, data);
 144         if (ath3k_load_firmware(data, data->fw_data, data->fw_size)) {
 145                 usb_set_intfdata(intf, NULL);
 146                 kfree(data->fw_data);
 147                 kfree(data);
 148                 return -EIO;
 149         }
 150
 151         return 0;
 152 }
 153
 154 static void ath3k_disconnect(struct usb_interface *intf)
 155 {
 156         struct ath3k_data *data = usb_get_intfdata(intf);
 157
 158         BT_DBG("ath3k_disconnect intf %p", intf);
 159
 160         kfree(data->fw_data);
 161         kfree(data);
 162 }
 163
 164 static struct usb_driver ath3k_driver = {
 165         .name           = "ath3k",
 166         .probe          = ath3k_probe,
 167         .disconnect     = ath3k_disconnect,
 168         .id_table       = ath3k_table,
 169 };
 170
 171 static int __init ath3k_init(void)
 172 {
 173         BT_INFO("Atheros AR30xx firmware driver ver %s", VERSION);
 174         return usb_register(&ath3k_driver);
 175 }
 176
 177 static void __exit ath3k_exit(void)
 178 {
 179         usb_deregister(&ath3k_driver);
 180 }
 181
 182 module_init(ath3k_init);
 183 module_exit(ath3k_exit);
 184
 185 MODULE_AUTHOR("Atheros Communications");
 186 MODULE_DESCRIPTION("Atheros AR30xx firmware driver");
 187 MODULE_VERSION(VERSION);
 188 MODULE_LICENSE("GPL");
 189 MODULE_FIRMWARE("ath3k-1.fw");