1 /* 2 * 3 * Broadcom Blutonium firmware driver 4 * 5 * Copyright (C) 2003 Maxim Krasnyansky <maxk@qualcomm.com> 6 * Copyright (C) 2003 Marcel Holtmann <marcel@holtmann.org> 7 * 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 */ 24 25 #include <linux/module.h> 26 27 #include <linux/kernel.h> 28 #include <linux/init.h> 29 #include <linux/slab.h> 30 #include <linux/types.h> 31 #include <linux/errno.h> 32 #include <linux/timer.h> 33 34 #include <linux/device.h> 35 #include <linux/firmware.h> 36 37 #include <linux/usb.h> 38 39 #include <net/bluetooth/bluetooth.h> 40 41 #ifndef CONFIG_BT_HCIBCM203X_DEBUG 42 #undef BT_DBG 43 #define BT_DBG(D...) 44 #endif 45 46 #define VERSION "1.0" 47 48 static int ignore = 0; 49 50 static struct usb_device_id bcm203x_table[] = { 51 /* Broadcom Blutonium (BCM2033) */ 52 { USB_DEVICE(0x0a5c, 0x2033) }, 53 54 { } /* Terminating entry */ 55 }; 56 57 MODULE_DEVICE_TABLE(usb, bcm203x_table); 58 59 #define BCM203X_ERROR 0 60 #define BCM203X_RESET 1 61 #define BCM203X_LOAD_MINIDRV 2 62 #define BCM203X_SELECT_MEMORY 3 63 #define BCM203X_CHECK_MEMORY 4 64 #define BCM203X_LOAD_FIRMWARE 5 65 #define BCM203X_CHECK_FIRMWARE 6 66 67 #define BCM203X_IN_EP 0x81 68 #define BCM203X_OUT_EP 0x02 69 70 struct bcm203x_data { 71 struct usb_device *udev; 72 73 unsigned long state; 74 75 struct timer_list timer; 76 77 struct urb *urb; 78 unsigned char *buffer; 79 80 unsigned char *fw_data; 81 unsigned int fw_size; 82 unsigned int fw_sent; 83 }; 84 85 static void bcm203x_complete(struct urb *urb, struct pt_regs *regs) 86 { 87 struct bcm203x_data *data = urb->context; 88 struct usb_device *udev = urb->dev; 89 int len; 90 91 BT_DBG("udev %p urb %p", udev, urb); 92 93 if (urb->status) { 94 BT_ERR("URB failed with status %d", urb->status); 95 data->state = BCM203X_ERROR; 96 return; 97 } 98 99 switch (data->state) { 100 case BCM203X_LOAD_MINIDRV: 101 memcpy(data->buffer, "#", 1); 102 103 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP), 104 data->buffer, 1, bcm203x_complete, data); 105 106 data->state = BCM203X_SELECT_MEMORY; 107 108 mod_timer(&data->timer, jiffies + (HZ / 10)); 109 break; 110 111 case BCM203X_SELECT_MEMORY: 112 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP), 113 data->buffer, 32, bcm203x_complete, data, 1); 114 115 data->state = BCM203X_CHECK_MEMORY; 116 117 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0) 118 BT_ERR("Can't submit URB"); 119 break; 120 121 case BCM203X_CHECK_MEMORY: 122 if (data->buffer[0] != '#') { 123 BT_ERR("Memory select failed"); 124 data->state = BCM203X_ERROR; 125 break; 126 } 127 128 data->state = BCM203X_LOAD_FIRMWARE; 129 130 case BCM203X_LOAD_FIRMWARE: 131 if (data->fw_sent == data->fw_size) { 132 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP), 133 data->buffer, 32, bcm203x_complete, data, 1); 134 135 data->state = BCM203X_CHECK_FIRMWARE; 136 } else { 137 len = min_t(uint, data->fw_size - data->fw_sent, 4096); 138 139 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP), 140 data->fw_data + data->fw_sent, len, bcm203x_complete, data); 141 142 data->fw_sent += len; 143 } 144 145 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0) 146 BT_ERR("Can't submit URB"); 147 break; 148 149 case BCM203X_CHECK_FIRMWARE: 150 if (data->buffer[0] != '.') { 151 BT_ERR("Firmware loading failed"); 152 data->state = BCM203X_ERROR; 153 break; 154 } 155 156 data->state = BCM203X_RESET; 157 break; 158 } 159 } 160 161 static void bcm203x_timer(unsigned long user_data) 162 { 163 struct bcm203x_data *data = (struct bcm203x_data *) user_data; 164 165 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0) 166 BT_ERR("Can't submit URB"); 167 } 168 169 static int bcm203x_probe(struct usb_interface *intf, const struct usb_device_id *id) 170 { 171 const struct firmware *firmware; 172 struct usb_device *udev = interface_to_usbdev(intf); 173 struct bcm203x_data *data; 174 int size; 175 176 BT_DBG("intf %p id %p", intf, id); 177 178 if (ignore || (intf->cur_altsetting->desc.bInterfaceNumber != 0)) 179 return -ENODEV; 180 181 data = kzalloc(sizeof(*data), GFP_KERNEL); 182 if (!data) { 183 BT_ERR("Can't allocate memory for data structure"); 184 return -ENOMEM; 185 } 186 187 data->udev = udev; 188 data->state = BCM203X_LOAD_MINIDRV; 189 190 data->urb = usb_alloc_urb(0, GFP_KERNEL); 191 if (!data->urb) { 192 BT_ERR("Can't allocate URB"); 193 kfree(data); 194 return -ENOMEM; 195 } 196 197 if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) { 198 BT_ERR("Mini driver request failed"); 199 usb_free_urb(data->urb); 200 kfree(data); 201 return -EIO; 202 } 203 204 BT_DBG("minidrv data %p size %d", firmware->data, firmware->size); 205 206 size = max_t(uint, firmware->size, 4096); 207 208 data->buffer = kmalloc(size, GFP_KERNEL); 209 if (!data->buffer) { 210 BT_ERR("Can't allocate memory for mini driver"); 211 release_firmware(firmware); 212 usb_free_urb(data->urb); 213 kfree(data); 214 return -ENOMEM; 215 } 216 217 memcpy(data->buffer, firmware->data, firmware->size); 218 219 usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP), 220 data->buffer, firmware->size, bcm203x_complete, data); 221 222 release_firmware(firmware); 223 224 if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) { 225 BT_ERR("Firmware request failed"); 226 usb_free_urb(data->urb); 227 kfree(data->buffer); 228 kfree(data); 229 return -EIO; 230 } 231 232 BT_DBG("firmware data %p size %d", firmware->data, firmware->size); 233 234 data->fw_data = kmalloc(firmware->size, GFP_KERNEL); 235 if (!data->fw_data) { 236 BT_ERR("Can't allocate memory for firmware image"); 237 release_firmware(firmware); 238 usb_free_urb(data->urb); 239 kfree(data->buffer); 240 kfree(data); 241 return -ENOMEM; 242 } 243 244 memcpy(data->fw_data, firmware->data, firmware->size); 245 data->fw_size = firmware->size; 246 data->fw_sent = 0; 247 248 release_firmware(firmware); 249 250 init_timer(&data->timer); 251 data->timer.function = bcm203x_timer; 252 data->timer.data = (unsigned long) data; 253 254 usb_set_intfdata(intf, data); 255 256 mod_timer(&data->timer, jiffies + HZ); 257 258 return 0; 259 } 260 261 static void bcm203x_disconnect(struct usb_interface *intf) 262 { 263 struct bcm203x_data *data = usb_get_intfdata(intf); 264 265 BT_DBG("intf %p", intf); 266 267 usb_kill_urb(data->urb); 268 269 usb_set_intfdata(intf, NULL); 270 271 usb_free_urb(data->urb); 272 kfree(data->fw_data); 273 kfree(data->buffer); 274 kfree(data); 275 } 276 277 static struct usb_driver bcm203x_driver = { 278 .name = "bcm203x", 279 .probe = bcm203x_probe, 280 .disconnect = bcm203x_disconnect, 281 .id_table = bcm203x_table, 282 }; 283 284 static int __init bcm203x_init(void) 285 { 286 int err; 287 288 BT_INFO("Broadcom Blutonium firmware driver ver %s", VERSION); 289 290 err = usb_register(&bcm203x_driver); 291 if (err < 0) 292 BT_ERR("Failed to register USB driver"); 293 294 return err; 295 } 296 297 static void __exit bcm203x_exit(void) 298 { 299 usb_deregister(&bcm203x_driver); 300 } 301 302 module_init(bcm203x_init); 303 module_exit(bcm203x_exit); 304 305 module_param(ignore, bool, 0644); 306 MODULE_PARM_DESC(ignore, "Ignore devices from the matching table"); 307 308 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 309 MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION); 310 MODULE_VERSION(VERSION); 311 MODULE_LICENSE("GPL"); 312