| 1 | /* |
| 2 | * Abilis Systems Single DVB-T Receiver |
| 3 | * Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com> |
| 4 | * Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2, or (at your option) |
| 9 | * any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | */ |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/slab.h> |
| 23 | #include <linux/mm.h> |
| 24 | #include <linux/usb.h> |
| 25 | |
| 26 | #include "as102_drv.h" |
| 27 | #include "as102_usb_drv.h" |
| 28 | #include "as102_fw.h" |
| 29 | |
| 30 | static void as102_usb_disconnect(struct usb_interface *interface); |
| 31 | static int as102_usb_probe(struct usb_interface *interface, |
| 32 | const struct usb_device_id *id); |
| 33 | |
| 34 | static int as102_usb_start_stream(struct as102_dev_t *dev); |
| 35 | static void as102_usb_stop_stream(struct as102_dev_t *dev); |
| 36 | |
| 37 | static int as102_open(struct inode *inode, struct file *file); |
| 38 | static int as102_release(struct inode *inode, struct file *file); |
| 39 | |
| 40 | static struct usb_device_id as102_usb_id_table[] = { |
| 41 | { USB_DEVICE(AS102_USB_DEVICE_VENDOR_ID, AS102_USB_DEVICE_PID_0001) }, |
| 42 | { USB_DEVICE(PCTV_74E_USB_VID, PCTV_74E_USB_PID) }, |
| 43 | { USB_DEVICE(ELGATO_EYETV_DTT_USB_VID, ELGATO_EYETV_DTT_USB_PID) }, |
| 44 | { USB_DEVICE(NBOX_DVBT_DONGLE_USB_VID, NBOX_DVBT_DONGLE_USB_PID) }, |
| 45 | { } /* Terminating entry */ |
| 46 | }; |
| 47 | |
| 48 | /* Note that this table must always have the same number of entries as the |
| 49 | as102_usb_id_table struct */ |
| 50 | static const char *as102_device_names[] = { |
| 51 | AS102_REFERENCE_DESIGN, |
| 52 | AS102_PCTV_74E, |
| 53 | AS102_ELGATO_EYETV_DTT_NAME, |
| 54 | AS102_NBOX_DVBT_DONGLE_NAME, |
| 55 | NULL /* Terminating entry */ |
| 56 | }; |
| 57 | |
| 58 | struct usb_driver as102_usb_driver = { |
| 59 | .name = DRIVER_FULL_NAME, |
| 60 | .probe = as102_usb_probe, |
| 61 | .disconnect = as102_usb_disconnect, |
| 62 | .id_table = as102_usb_id_table |
| 63 | }; |
| 64 | |
| 65 | static const struct file_operations as102_dev_fops = { |
| 66 | .owner = THIS_MODULE, |
| 67 | .open = as102_open, |
| 68 | .release = as102_release, |
| 69 | }; |
| 70 | |
| 71 | static struct usb_class_driver as102_usb_class_driver = { |
| 72 | .name = "aton2-%d", |
| 73 | .fops = &as102_dev_fops, |
| 74 | .minor_base = AS102_DEVICE_MAJOR, |
| 75 | }; |
| 76 | |
| 77 | static int as102_usb_xfer_cmd(struct as102_bus_adapter_t *bus_adap, |
| 78 | unsigned char *send_buf, int send_buf_len, |
| 79 | unsigned char *recv_buf, int recv_buf_len) |
| 80 | { |
| 81 | int ret = 0; |
| 82 | ENTER(); |
| 83 | |
| 84 | if (send_buf != NULL) { |
| 85 | ret = usb_control_msg(bus_adap->usb_dev, |
| 86 | usb_sndctrlpipe(bus_adap->usb_dev, 0), |
| 87 | AS102_USB_DEVICE_TX_CTRL_CMD, |
| 88 | USB_DIR_OUT | USB_TYPE_VENDOR | |
| 89 | USB_RECIP_DEVICE, |
| 90 | bus_adap->cmd_xid, /* value */ |
| 91 | 0, /* index */ |
| 92 | send_buf, send_buf_len, |
| 93 | USB_CTRL_SET_TIMEOUT /* 200 */); |
| 94 | if (ret < 0) { |
| 95 | dprintk(debug, "usb_control_msg(send) failed, err %i\n", |
| 96 | ret); |
| 97 | return ret; |
| 98 | } |
| 99 | |
| 100 | if (ret != send_buf_len) { |
| 101 | dprintk(debug, "only wrote %d of %d bytes\n", |
| 102 | ret, send_buf_len); |
| 103 | return -1; |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | if (recv_buf != NULL) { |
| 108 | #ifdef TRACE |
| 109 | dprintk(debug, "want to read: %d bytes\n", recv_buf_len); |
| 110 | #endif |
| 111 | ret = usb_control_msg(bus_adap->usb_dev, |
| 112 | usb_rcvctrlpipe(bus_adap->usb_dev, 0), |
| 113 | AS102_USB_DEVICE_RX_CTRL_CMD, |
| 114 | USB_DIR_IN | USB_TYPE_VENDOR | |
| 115 | USB_RECIP_DEVICE, |
| 116 | bus_adap->cmd_xid, /* value */ |
| 117 | 0, /* index */ |
| 118 | recv_buf, recv_buf_len, |
| 119 | USB_CTRL_GET_TIMEOUT /* 200 */); |
| 120 | if (ret < 0) { |
| 121 | dprintk(debug, "usb_control_msg(recv) failed, err %i\n", |
| 122 | ret); |
| 123 | return ret; |
| 124 | } |
| 125 | #ifdef TRACE |
| 126 | dprintk(debug, "read %d bytes\n", recv_buf_len); |
| 127 | #endif |
| 128 | } |
| 129 | |
| 130 | LEAVE(); |
| 131 | return ret; |
| 132 | } |
| 133 | |
| 134 | static int as102_send_ep1(struct as102_bus_adapter_t *bus_adap, |
| 135 | unsigned char *send_buf, |
| 136 | int send_buf_len, |
| 137 | int swap32) |
| 138 | { |
| 139 | int ret = 0, actual_len; |
| 140 | |
| 141 | ret = usb_bulk_msg(bus_adap->usb_dev, |
| 142 | usb_sndbulkpipe(bus_adap->usb_dev, 1), |
| 143 | send_buf, send_buf_len, &actual_len, 200); |
| 144 | if (ret) { |
| 145 | dprintk(debug, "usb_bulk_msg(send) failed, err %i\n", ret); |
| 146 | return ret; |
| 147 | } |
| 148 | |
| 149 | if (actual_len != send_buf_len) { |
| 150 | dprintk(debug, "only wrote %d of %d bytes\n", |
| 151 | actual_len, send_buf_len); |
| 152 | return -1; |
| 153 | } |
| 154 | return ret ? ret : actual_len; |
| 155 | } |
| 156 | |
| 157 | static int as102_read_ep2(struct as102_bus_adapter_t *bus_adap, |
| 158 | unsigned char *recv_buf, int recv_buf_len) |
| 159 | { |
| 160 | int ret = 0, actual_len; |
| 161 | |
| 162 | if (recv_buf == NULL) |
| 163 | return -EINVAL; |
| 164 | |
| 165 | ret = usb_bulk_msg(bus_adap->usb_dev, |
| 166 | usb_rcvbulkpipe(bus_adap->usb_dev, 2), |
| 167 | recv_buf, recv_buf_len, &actual_len, 200); |
| 168 | if (ret) { |
| 169 | dprintk(debug, "usb_bulk_msg(recv) failed, err %i\n", ret); |
| 170 | return ret; |
| 171 | } |
| 172 | |
| 173 | if (actual_len != recv_buf_len) { |
| 174 | dprintk(debug, "only read %d of %d bytes\n", |
| 175 | actual_len, recv_buf_len); |
| 176 | return -1; |
| 177 | } |
| 178 | return ret ? ret : actual_len; |
| 179 | } |
| 180 | |
| 181 | struct as102_priv_ops_t as102_priv_ops = { |
| 182 | .upload_fw_pkt = as102_send_ep1, |
| 183 | .xfer_cmd = as102_usb_xfer_cmd, |
| 184 | .as102_read_ep2 = as102_read_ep2, |
| 185 | .start_stream = as102_usb_start_stream, |
| 186 | .stop_stream = as102_usb_stop_stream, |
| 187 | }; |
| 188 | |
| 189 | static int as102_submit_urb_stream(struct as102_dev_t *dev, struct urb *urb) |
| 190 | { |
| 191 | int err; |
| 192 | |
| 193 | usb_fill_bulk_urb(urb, |
| 194 | dev->bus_adap.usb_dev, |
| 195 | usb_rcvbulkpipe(dev->bus_adap.usb_dev, 0x2), |
| 196 | urb->transfer_buffer, |
| 197 | AS102_USB_BUF_SIZE, |
| 198 | as102_urb_stream_irq, |
| 199 | dev); |
| 200 | |
| 201 | err = usb_submit_urb(urb, GFP_ATOMIC); |
| 202 | if (err) |
| 203 | dprintk(debug, "%s: usb_submit_urb failed\n", __func__); |
| 204 | |
| 205 | return err; |
| 206 | } |
| 207 | |
| 208 | void as102_urb_stream_irq(struct urb *urb) |
| 209 | { |
| 210 | struct as102_dev_t *as102_dev = urb->context; |
| 211 | |
| 212 | if (urb->actual_length > 0) { |
| 213 | dvb_dmx_swfilter(&as102_dev->dvb_dmx, |
| 214 | urb->transfer_buffer, |
| 215 | urb->actual_length); |
| 216 | } else { |
| 217 | if (urb->actual_length == 0) |
| 218 | memset(urb->transfer_buffer, 0, AS102_USB_BUF_SIZE); |
| 219 | } |
| 220 | |
| 221 | /* is not stopped, re-submit urb */ |
| 222 | if (as102_dev->streaming) |
| 223 | as102_submit_urb_stream(as102_dev, urb); |
| 224 | } |
| 225 | |
| 226 | static void as102_free_usb_stream_buffer(struct as102_dev_t *dev) |
| 227 | { |
| 228 | int i; |
| 229 | |
| 230 | ENTER(); |
| 231 | |
| 232 | for (i = 0; i < MAX_STREAM_URB; i++) |
| 233 | usb_free_urb(dev->stream_urb[i]); |
| 234 | |
| 235 | usb_free_coherent(dev->bus_adap.usb_dev, |
| 236 | MAX_STREAM_URB * AS102_USB_BUF_SIZE, |
| 237 | dev->stream, |
| 238 | dev->dma_addr); |
| 239 | LEAVE(); |
| 240 | } |
| 241 | |
| 242 | static int as102_alloc_usb_stream_buffer(struct as102_dev_t *dev) |
| 243 | { |
| 244 | int i, ret = 0; |
| 245 | |
| 246 | ENTER(); |
| 247 | |
| 248 | dev->stream = usb_alloc_coherent(dev->bus_adap.usb_dev, |
| 249 | MAX_STREAM_URB * AS102_USB_BUF_SIZE, |
| 250 | GFP_KERNEL, |
| 251 | &dev->dma_addr); |
| 252 | if (!dev->stream) { |
| 253 | dprintk(debug, "%s: usb_buffer_alloc failed\n", __func__); |
| 254 | return -ENOMEM; |
| 255 | } |
| 256 | |
| 257 | memset(dev->stream, 0, MAX_STREAM_URB * AS102_USB_BUF_SIZE); |
| 258 | |
| 259 | /* init urb buffers */ |
| 260 | for (i = 0; i < MAX_STREAM_URB; i++) { |
| 261 | struct urb *urb; |
| 262 | |
| 263 | urb = usb_alloc_urb(0, GFP_ATOMIC); |
| 264 | if (urb == NULL) { |
| 265 | dprintk(debug, "%s: usb_alloc_urb failed\n", __func__); |
| 266 | as102_free_usb_stream_buffer(dev); |
| 267 | return -ENOMEM; |
| 268 | } |
| 269 | |
| 270 | urb->transfer_buffer = dev->stream + (i * AS102_USB_BUF_SIZE); |
| 271 | urb->transfer_buffer_length = AS102_USB_BUF_SIZE; |
| 272 | |
| 273 | dev->stream_urb[i] = urb; |
| 274 | } |
| 275 | LEAVE(); |
| 276 | return ret; |
| 277 | } |
| 278 | |
| 279 | static void as102_usb_stop_stream(struct as102_dev_t *dev) |
| 280 | { |
| 281 | int i; |
| 282 | |
| 283 | for (i = 0; i < MAX_STREAM_URB; i++) |
| 284 | usb_kill_urb(dev->stream_urb[i]); |
| 285 | } |
| 286 | |
| 287 | static int as102_usb_start_stream(struct as102_dev_t *dev) |
| 288 | { |
| 289 | int i, ret = 0; |
| 290 | |
| 291 | for (i = 0; i < MAX_STREAM_URB; i++) { |
| 292 | ret = as102_submit_urb_stream(dev, dev->stream_urb[i]); |
| 293 | if (ret) { |
| 294 | as102_usb_stop_stream(dev); |
| 295 | return ret; |
| 296 | } |
| 297 | } |
| 298 | |
| 299 | return 0; |
| 300 | } |
| 301 | |
| 302 | static void as102_usb_release(struct kref *kref) |
| 303 | { |
| 304 | struct as102_dev_t *as102_dev; |
| 305 | |
| 306 | ENTER(); |
| 307 | |
| 308 | as102_dev = container_of(kref, struct as102_dev_t, kref); |
| 309 | if (as102_dev != NULL) { |
| 310 | usb_put_dev(as102_dev->bus_adap.usb_dev); |
| 311 | kfree(as102_dev); |
| 312 | } |
| 313 | |
| 314 | LEAVE(); |
| 315 | } |
| 316 | |
| 317 | static void as102_usb_disconnect(struct usb_interface *intf) |
| 318 | { |
| 319 | struct as102_dev_t *as102_dev; |
| 320 | |
| 321 | ENTER(); |
| 322 | |
| 323 | /* extract as102_dev_t from usb_device private data */ |
| 324 | as102_dev = usb_get_intfdata(intf); |
| 325 | |
| 326 | /* unregister dvb layer */ |
| 327 | as102_dvb_unregister(as102_dev); |
| 328 | |
| 329 | /* free usb buffers */ |
| 330 | as102_free_usb_stream_buffer(as102_dev); |
| 331 | |
| 332 | usb_set_intfdata(intf, NULL); |
| 333 | |
| 334 | /* usb unregister device */ |
| 335 | usb_deregister_dev(intf, &as102_usb_class_driver); |
| 336 | |
| 337 | /* decrement usage counter */ |
| 338 | kref_put(&as102_dev->kref, as102_usb_release); |
| 339 | |
| 340 | printk(KERN_INFO "%s: device has been disconnected\n", DRIVER_NAME); |
| 341 | |
| 342 | LEAVE(); |
| 343 | } |
| 344 | |
| 345 | static int as102_usb_probe(struct usb_interface *intf, |
| 346 | const struct usb_device_id *id) |
| 347 | { |
| 348 | int ret; |
| 349 | struct as102_dev_t *as102_dev; |
| 350 | int i; |
| 351 | |
| 352 | ENTER(); |
| 353 | |
| 354 | as102_dev = kzalloc(sizeof(struct as102_dev_t), GFP_KERNEL); |
| 355 | if (as102_dev == NULL) { |
| 356 | err("%s: kzalloc failed", __func__); |
| 357 | return -ENOMEM; |
| 358 | } |
| 359 | |
| 360 | /* This should never actually happen */ |
| 361 | if ((sizeof(as102_usb_id_table) / sizeof(struct usb_device_id)) != |
| 362 | (sizeof(as102_device_names) / sizeof(const char *))) { |
| 363 | printk(KERN_ERR "Device names table invalid size"); |
| 364 | return -EINVAL; |
| 365 | } |
| 366 | |
| 367 | /* Assign the user-friendly device name */ |
| 368 | for (i = 0; i < (sizeof(as102_usb_id_table) / |
| 369 | sizeof(struct usb_device_id)); i++) { |
| 370 | if (id == &as102_usb_id_table[i]) |
| 371 | as102_dev->name = as102_device_names[i]; |
| 372 | } |
| 373 | |
| 374 | if (as102_dev->name == NULL) |
| 375 | as102_dev->name = "Unknown AS102 device"; |
| 376 | |
| 377 | /* set private callback functions */ |
| 378 | as102_dev->bus_adap.ops = &as102_priv_ops; |
| 379 | |
| 380 | /* init cmd token for usb bus */ |
| 381 | as102_dev->bus_adap.cmd = &as102_dev->bus_adap.token.usb.c; |
| 382 | as102_dev->bus_adap.rsp = &as102_dev->bus_adap.token.usb.r; |
| 383 | |
| 384 | /* init kernel device reference */ |
| 385 | kref_init(&as102_dev->kref); |
| 386 | |
| 387 | /* store as102 device to usb_device private data */ |
| 388 | usb_set_intfdata(intf, (void *) as102_dev); |
| 389 | |
| 390 | /* store in as102 device the usb_device pointer */ |
| 391 | as102_dev->bus_adap.usb_dev = usb_get_dev(interface_to_usbdev(intf)); |
| 392 | |
| 393 | /* we can register the device now, as it is ready */ |
| 394 | ret = usb_register_dev(intf, &as102_usb_class_driver); |
| 395 | if (ret < 0) { |
| 396 | /* something prevented us from registering this driver */ |
| 397 | err("%s: usb_register_dev() failed (errno = %d)", |
| 398 | __func__, ret); |
| 399 | goto failed; |
| 400 | } |
| 401 | |
| 402 | printk(KERN_INFO "%s: device has been detected\n", DRIVER_NAME); |
| 403 | |
| 404 | /* request buffer allocation for streaming */ |
| 405 | ret = as102_alloc_usb_stream_buffer(as102_dev); |
| 406 | if (ret != 0) |
| 407 | goto failed; |
| 408 | |
| 409 | /* register dvb layer */ |
| 410 | ret = as102_dvb_register(as102_dev); |
| 411 | |
| 412 | LEAVE(); |
| 413 | return ret; |
| 414 | |
| 415 | failed: |
| 416 | usb_set_intfdata(intf, NULL); |
| 417 | kfree(as102_dev); |
| 418 | return ret; |
| 419 | } |
| 420 | |
| 421 | static int as102_open(struct inode *inode, struct file *file) |
| 422 | { |
| 423 | int ret = 0, minor = 0; |
| 424 | struct usb_interface *intf = NULL; |
| 425 | struct as102_dev_t *dev = NULL; |
| 426 | |
| 427 | ENTER(); |
| 428 | |
| 429 | /* read minor from inode */ |
| 430 | minor = iminor(inode); |
| 431 | |
| 432 | /* fetch device from usb interface */ |
| 433 | intf = usb_find_interface(&as102_usb_driver, minor); |
| 434 | if (intf == NULL) { |
| 435 | printk(KERN_ERR "%s: can't find device for minor %d\n", |
| 436 | __func__, minor); |
| 437 | ret = -ENODEV; |
| 438 | goto exit; |
| 439 | } |
| 440 | |
| 441 | /* get our device */ |
| 442 | dev = usb_get_intfdata(intf); |
| 443 | if (dev == NULL) { |
| 444 | ret = -EFAULT; |
| 445 | goto exit; |
| 446 | } |
| 447 | |
| 448 | /* save our device object in the file's private structure */ |
| 449 | file->private_data = dev; |
| 450 | |
| 451 | /* increment our usage count for the device */ |
| 452 | kref_get(&dev->kref); |
| 453 | |
| 454 | exit: |
| 455 | LEAVE(); |
| 456 | return ret; |
| 457 | } |
| 458 | |
| 459 | static int as102_release(struct inode *inode, struct file *file) |
| 460 | { |
| 461 | int ret = 0; |
| 462 | struct as102_dev_t *dev = NULL; |
| 463 | |
| 464 | ENTER(); |
| 465 | |
| 466 | dev = file->private_data; |
| 467 | if (dev != NULL) { |
| 468 | /* decrement the count on our device */ |
| 469 | kref_put(&dev->kref, as102_usb_release); |
| 470 | } |
| 471 | |
| 472 | LEAVE(); |
| 473 | return ret; |
| 474 | } |
| 475 | |
| 476 | MODULE_DEVICE_TABLE(usb, as102_usb_id_table); |
| 477 | |
| 478 | /* EOF - vim: set textwidth=80 ts=8 sw=8 sts=8 noet: */ |