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/config.h> 26 #include <linux/module.h> 27 28 #include <linux/kernel.h> 29 #include <linux/init.h> 30 #include <linux/slab.h> 31 #include <linux/types.h> 32 #include <linux/errno.h> 33 #include <linux/timer.h> 34 35 #include <linux/device.h> 36 #include <linux/firmware.h> 37 38 #include <linux/usb.h> 39 40 #include <net/bluetooth/bluetooth.h> 41 42 #ifndef CONFIG_BT_HCIBCM203X_DEBUG 43 #undef BT_DBG 44 #define BT_DBG(D...) 45 #endif 46 47 #define VERSION "1.0" 48 49 static int ignore = 0; 50 51 static struct usb_device_id bcm203x_table[] = { 52 /* Broadcom Blutonium (BCM2033) */ 53 { USB_DEVICE(0x0a5c, 0x2033) }, 54 55 { } /* Terminating entry */ 56 }; 57 58 MODULE_DEVICE_TABLE(usb, bcm203x_table); 59 60 #define BCM203X_ERROR 0 61 #define BCM203X_RESET 1 62 #define BCM203X_LOAD_MINIDRV 2 63 #define BCM203X_SELECT_MEMORY 3 64 #define BCM203X_CHECK_MEMORY 4 65 #define BCM203X_LOAD_FIRMWARE 5 66 #define BCM203X_CHECK_FIRMWARE 6 67 68 #define BCM203X_IN_EP 0x81 69 #define BCM203X_OUT_EP 0x02 70 71 struct bcm203x_data { 72 struct usb_device *udev; 73 74 unsigned long state; 75 76 struct timer_list timer; 77 78 struct urb *urb; 79 unsigned char *buffer; 80 81 unsigned char *fw_data; 82 unsigned int fw_size; 83 unsigned int fw_sent; 84 }; 85 86 static void bcm203x_complete(struct urb *urb, struct pt_regs *regs) 87 { 88 struct bcm203x_data *data = urb->context; 89 struct usb_device *udev = urb->dev; 90 int len; 91 92 BT_DBG("udev %p urb %p", udev, urb); 93 94 if (urb->status) { 95 BT_ERR("URB failed with status %d", urb->status); 96 data->state = BCM203X_ERROR; 97 return; 98 } 99 100 switch (data->state) { 101 case BCM203X_LOAD_MINIDRV: 102 memcpy(data->buffer, "#", 1); 103 104 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP), 105 data->buffer, 1, bcm203x_complete, data); 106 107 data->state = BCM203X_SELECT_MEMORY; 108 109 mod_timer(&data->timer, jiffies + (HZ / 10)); 110 break; 111 112 case BCM203X_SELECT_MEMORY: 113 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP), 114 data->buffer, 32, bcm203x_complete, data, 1); 115 116 data->state = BCM203X_CHECK_MEMORY; 117 118 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0) 119 BT_ERR("Can't submit URB"); 120 break; 121 122 case BCM203X_CHECK_MEMORY: 123 if (data->buffer[0] != '#') { 124 BT_ERR("Memory select failed"); 125 data->state = BCM203X_ERROR; 126 break; 127 } 128 129 data->state = BCM203X_LOAD_FIRMWARE; 130 131 case BCM203X_LOAD_FIRMWARE: 132 if (data->fw_sent == data->fw_size) { 133 usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, BCM203X_IN_EP), 134 data->buffer, 32, bcm203x_complete, data, 1); 135 136 data->state = BCM203X_CHECK_FIRMWARE; 137 } else { 138 len = min_t(uint, data->fw_size - data->fw_sent, 4096); 139 140 usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP), 141 data->fw_data + data->fw_sent, len, bcm203x_complete, data); 142 143 data->fw_sent += len; 144 } 145 146 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0) 147 BT_ERR("Can't submit URB"); 148 break; 149 150 case BCM203X_CHECK_FIRMWARE: 151 if (data->buffer[0] != '.') { 152 BT_ERR("Firmware loading failed"); 153 data->state = BCM203X_ERROR; 154 break; 155 } 156 157 data->state = BCM203X_RESET; 158 break; 159 } 160 } 161 162 static void bcm203x_timer(unsigned long user_data) 163 { 164 struct bcm203x_data *data = (struct bcm203x_data *) user_data; 165 166 if (usb_submit_urb(data->urb, GFP_ATOMIC) < 0) 167 BT_ERR("Can't submit URB"); 168 } 169 170 static int bcm203x_probe(struct usb_interface *intf, const struct usb_device_id *id) 171 { 172 const struct firmware *firmware; 173 struct usb_device *udev = interface_to_usbdev(intf); 174 struct bcm203x_data *data; 175 int size; 176 177 BT_DBG("intf %p id %p", intf, id); 178 179 if (ignore || (intf->cur_altsetting->desc.bInterfaceNumber != 0)) 180 return -ENODEV; 181 182 data = kmalloc(sizeof(*data), GFP_KERNEL); 183 if (!data) { 184 BT_ERR("Can't allocate memory for data structure"); 185 return -ENOMEM; 186 } 187 188 memset(data, 0, sizeof(*data)); 189 190 data->udev = udev; 191 data->state = BCM203X_LOAD_MINIDRV; 192 193 data->urb = usb_alloc_urb(0, GFP_KERNEL); 194 if (!data->urb) { 195 BT_ERR("Can't allocate URB"); 196 kfree(data); 197 return -ENOMEM; 198 } 199 200 if (request_firmware(&firmware, "BCM2033-MD.hex", &udev->dev) < 0) { 201 BT_ERR("Mini driver request failed"); 202 usb_free_urb(data->urb); 203 kfree(data); 204 return -EIO; 205 } 206 207 BT_DBG("minidrv data %p size %d", firmware->data, firmware->size); 208 209 size = max_t(uint, firmware->size, 4096); 210 211 data->buffer = kmalloc(size, GFP_KERNEL); 212 if (!data->buffer) { 213 BT_ERR("Can't allocate memory for mini driver"); 214 release_firmware(firmware); 215 usb_free_urb(data->urb); 216 kfree(data); 217 return -ENOMEM; 218 } 219 220 memcpy(data->buffer, firmware->data, firmware->size); 221 222 usb_fill_bulk_urb(data->urb, udev, usb_sndbulkpipe(udev, BCM203X_OUT_EP), 223 data->buffer, firmware->size, bcm203x_complete, data); 224 225 release_firmware(firmware); 226 227 if (request_firmware(&firmware, "BCM2033-FW.bin", &udev->dev) < 0) { 228 BT_ERR("Firmware request failed"); 229 usb_free_urb(data->urb); 230 kfree(data->buffer); 231 kfree(data); 232 return -EIO; 233 } 234 235 BT_DBG("firmware data %p size %d", firmware->data, firmware->size); 236 237 data->fw_data = kmalloc(firmware->size, GFP_KERNEL); 238 if (!data->fw_data) { 239 BT_ERR("Can't allocate memory for firmware image"); 240 usb_free_urb(data->urb); 241 kfree(data->buffer); 242 kfree(data); 243 return -ENOMEM; 244 } 245 246 memcpy(data->fw_data, firmware->data, firmware->size); 247 data->fw_size = firmware->size; 248 data->fw_sent = 0; 249 250 release_firmware(firmware); 251 252 init_timer(&data->timer); 253 data->timer.function = bcm203x_timer; 254 data->timer.data = (unsigned long) data; 255 256 usb_set_intfdata(intf, data); 257 258 mod_timer(&data->timer, jiffies + HZ); 259 260 return 0; 261 } 262 263 static void bcm203x_disconnect(struct usb_interface *intf) 264 { 265 struct bcm203x_data *data = usb_get_intfdata(intf); 266 267 BT_DBG("intf %p", intf); 268 269 usb_kill_urb(data->urb); 270 271 usb_set_intfdata(intf, NULL); 272 273 usb_free_urb(data->urb); 274 kfree(data->fw_data); 275 kfree(data->buffer); 276 kfree(data); 277 } 278 279 static struct usb_driver bcm203x_driver = { 280 .owner = THIS_MODULE, 281 .name = "bcm203x", 282 .probe = bcm203x_probe, 283 .disconnect = bcm203x_disconnect, 284 .id_table = bcm203x_table, 285 }; 286 287 static int __init bcm203x_init(void) 288 { 289 int err; 290 291 BT_INFO("Broadcom Blutonium firmware driver ver %s", VERSION); 292 293 err = usb_register(&bcm203x_driver); 294 if (err < 0) 295 BT_ERR("Failed to register USB driver"); 296 297 return err; 298 } 299 300 static void __exit bcm203x_exit(void) 301 { 302 usb_deregister(&bcm203x_driver); 303 } 304 305 module_init(bcm203x_init); 306 module_exit(bcm203x_exit); 307 308 module_param(ignore, bool, 0644); 309 MODULE_PARM_DESC(ignore, "Ignore devices from the matching table"); 310 311 MODULE_AUTHOR("Marcel Holtmann <marcel@holtmann.org>"); 312 MODULE_DESCRIPTION("Broadcom Blutonium firmware driver ver " VERSION); 313 MODULE_VERSION(VERSION); 314 MODULE_LICENSE("GPL"); 315