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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Abilis Systems Single DVB-T Receiver4 * Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com>5 * Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>6 */7#include <linux/kernel.h>8#include <linux/errno.h>9#include <linux/slab.h>10#include <linux/mm.h>11#include <linux/usb.h>12 13#include "as102_drv.h"14#include "as102_usb_drv.h"15#include "as102_fw.h"16 17static void as102_usb_disconnect(struct usb_interface *interface);18static int as102_usb_probe(struct usb_interface *interface,19 const struct usb_device_id *id);20 21static int as102_usb_start_stream(struct as102_dev_t *dev);22static void as102_usb_stop_stream(struct as102_dev_t *dev);23 24static int as102_open(struct inode *inode, struct file *file);25static int as102_release(struct inode *inode, struct file *file);26 27static const struct usb_device_id as102_usb_id_table[] = {28 { USB_DEVICE(AS102_USB_DEVICE_VENDOR_ID, AS102_USB_DEVICE_PID_0001) },29 { USB_DEVICE(PCTV_74E_USB_VID, PCTV_74E_USB_PID) },30 { USB_DEVICE(ELGATO_EYETV_DTT_USB_VID, ELGATO_EYETV_DTT_USB_PID) },31 { USB_DEVICE(NBOX_DVBT_DONGLE_USB_VID, NBOX_DVBT_DONGLE_USB_PID) },32 { USB_DEVICE(SKY_IT_DIGITAL_KEY_USB_VID, SKY_IT_DIGITAL_KEY_USB_PID) },33 { } /* Terminating entry */34};35 36/* Note that this table must always have the same number of entries as the37 as102_usb_id_table struct */38static const char * const as102_device_names[] = {39 AS102_REFERENCE_DESIGN,40 AS102_PCTV_74E,41 AS102_ELGATO_EYETV_DTT_NAME,42 AS102_NBOX_DVBT_DONGLE_NAME,43 AS102_SKY_IT_DIGITAL_KEY_NAME,44 NULL /* Terminating entry */45};46 47/* eLNA configuration: devices built on the reference design work best48 with 0xA0, while custom designs seem to require 0xC0 */49static uint8_t const as102_elna_cfg[] = {50 0xA0,51 0xC0,52 0xC0,53 0xA0,54 0xA0,55 0x00 /* Terminating entry */56};57 58struct 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_table63};64 65static const struct file_operations as102_dev_fops = {66 .owner = THIS_MODULE,67 .open = as102_open,68 .release = as102_release,69};70 71static 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 77static int as102_usb_xfer_cmd(struct as10x_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 83 if (send_buf != NULL) {84 ret = usb_control_msg(bus_adap->usb_dev,85 usb_sndctrlpipe(bus_adap->usb_dev, 0),86 AS102_USB_DEVICE_TX_CTRL_CMD,87 USB_DIR_OUT | USB_TYPE_VENDOR |88 USB_RECIP_DEVICE,89 bus_adap->cmd_xid, /* value */90 0, /* index */91 send_buf, send_buf_len,92 USB_CTRL_SET_TIMEOUT /* 200 */);93 if (ret < 0) {94 dev_dbg(&bus_adap->usb_dev->dev,95 "usb_control_msg(send) failed, err %i\n", ret);96 return ret;97 }98 99 if (ret != send_buf_len) {100 dev_dbg(&bus_adap->usb_dev->dev,101 "only wrote %d of %d bytes\n", ret, send_buf_len);102 return -1;103 }104 }105 106 if (recv_buf != NULL) {107#ifdef TRACE108 dev_dbg(bus_adap->usb_dev->dev,109 "want to read: %d bytes\n", recv_buf_len);110#endif111 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 dev_dbg(&bus_adap->usb_dev->dev,122 "usb_control_msg(recv) failed, err %i\n", ret);123 return ret;124 }125#ifdef TRACE126 dev_dbg(bus_adap->usb_dev->dev,127 "read %d bytes\n", recv_buf_len);128#endif129 }130 131 return ret;132}133 134static int as102_send_ep1(struct as10x_bus_adapter_t *bus_adap,135 unsigned char *send_buf,136 int send_buf_len,137 int swap32)138{139 int ret, 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 dev_dbg(&bus_adap->usb_dev->dev,146 "usb_bulk_msg(send) failed, err %i\n", ret);147 return ret;148 }149 150 if (actual_len != send_buf_len) {151 dev_dbg(&bus_adap->usb_dev->dev, "only wrote %d of %d bytes\n",152 actual_len, send_buf_len);153 return -1;154 }155 return actual_len;156}157 158static int as102_read_ep2(struct as10x_bus_adapter_t *bus_adap,159 unsigned char *recv_buf, int recv_buf_len)160{161 int ret, actual_len;162 163 if (recv_buf == NULL)164 return -EINVAL;165 166 ret = usb_bulk_msg(bus_adap->usb_dev,167 usb_rcvbulkpipe(bus_adap->usb_dev, 2),168 recv_buf, recv_buf_len, &actual_len, 200);169 if (ret) {170 dev_dbg(&bus_adap->usb_dev->dev,171 "usb_bulk_msg(recv) failed, err %i\n", ret);172 return ret;173 }174 175 if (actual_len != recv_buf_len) {176 dev_dbg(&bus_adap->usb_dev->dev, "only read %d of %d bytes\n",177 actual_len, recv_buf_len);178 return -1;179 }180 return actual_len;181}182 183static const struct as102_priv_ops_t as102_priv_ops = {184 .upload_fw_pkt = as102_send_ep1,185 .xfer_cmd = as102_usb_xfer_cmd,186 .as102_read_ep2 = as102_read_ep2,187 .start_stream = as102_usb_start_stream,188 .stop_stream = as102_usb_stop_stream,189};190 191static int as102_submit_urb_stream(struct as102_dev_t *dev, struct urb *urb)192{193 int err;194 195 usb_fill_bulk_urb(urb,196 dev->bus_adap.usb_dev,197 usb_rcvbulkpipe(dev->bus_adap.usb_dev, 0x2),198 urb->transfer_buffer,199 AS102_USB_BUF_SIZE,200 as102_urb_stream_irq,201 dev);202 203 err = usb_submit_urb(urb, GFP_ATOMIC);204 if (err)205 dev_dbg(&urb->dev->dev,206 "%s: usb_submit_urb failed\n", __func__);207 208 return err;209}210 211void as102_urb_stream_irq(struct urb *urb)212{213 struct as102_dev_t *as102_dev = urb->context;214 215 if (urb->actual_length > 0) {216 dvb_dmx_swfilter(&as102_dev->dvb_dmx,217 urb->transfer_buffer,218 urb->actual_length);219 } else {220 if (urb->actual_length == 0)221 memset(urb->transfer_buffer, 0, AS102_USB_BUF_SIZE);222 }223 224 /* is not stopped, re-submit urb */225 if (as102_dev->streaming)226 as102_submit_urb_stream(as102_dev, urb);227}228 229static void as102_free_usb_stream_buffer(struct as102_dev_t *dev)230{231 int i;232 233 for (i = 0; i < MAX_STREAM_URB; i++)234 usb_free_urb(dev->stream_urb[i]);235 236 usb_free_coherent(dev->bus_adap.usb_dev,237 MAX_STREAM_URB * AS102_USB_BUF_SIZE,238 dev->stream,239 dev->dma_addr);240}241 242static int as102_alloc_usb_stream_buffer(struct as102_dev_t *dev)243{244 int i;245 246 dev->stream = usb_alloc_coherent(dev->bus_adap.usb_dev,247 MAX_STREAM_URB * AS102_USB_BUF_SIZE,248 GFP_KERNEL,249 &dev->dma_addr);250 if (!dev->stream) {251 dev_dbg(&dev->bus_adap.usb_dev->dev,252 "%s: usb_buffer_alloc failed\n", __func__);253 return -ENOMEM;254 }255 256 memset(dev->stream, 0, MAX_STREAM_URB * AS102_USB_BUF_SIZE);257 258 /* init urb buffers */259 for (i = 0; i < MAX_STREAM_URB; i++) {260 struct urb *urb;261 262 urb = usb_alloc_urb(0, GFP_KERNEL);263 if (urb == NULL) {264 as102_free_usb_stream_buffer(dev);265 return -ENOMEM;266 }267 268 urb->transfer_buffer = dev->stream + (i * AS102_USB_BUF_SIZE);269 urb->transfer_dma = dev->dma_addr + (i * AS102_USB_BUF_SIZE);270 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;271 urb->transfer_buffer_length = AS102_USB_BUF_SIZE;272 273 dev->stream_urb[i] = urb;274 }275 return 0;276}277 278static void as102_usb_stop_stream(struct as102_dev_t *dev)279{280 int i;281 282 for (i = 0; i < MAX_STREAM_URB; i++)283 usb_kill_urb(dev->stream_urb[i]);284}285 286static int as102_usb_start_stream(struct as102_dev_t *dev)287{288 int i, ret = 0;289 290 for (i = 0; i < MAX_STREAM_URB; i++) {291 ret = as102_submit_urb_stream(dev, dev->stream_urb[i]);292 if (ret) {293 as102_usb_stop_stream(dev);294 return ret;295 }296 }297 298 return 0;299}300 301static void as102_usb_release(struct kref *kref)302{303 struct as102_dev_t *as102_dev;304 305 as102_dev = container_of(kref, struct as102_dev_t, kref);306 usb_put_dev(as102_dev->bus_adap.usb_dev);307 kfree(as102_dev);308}309 310static void as102_usb_disconnect(struct usb_interface *intf)311{312 struct as102_dev_t *as102_dev;313 314 /* extract as102_dev_t from usb_device private data */315 as102_dev = usb_get_intfdata(intf);316 317 /* unregister dvb layer */318 as102_dvb_unregister(as102_dev);319 320 /* free usb buffers */321 as102_free_usb_stream_buffer(as102_dev);322 323 usb_set_intfdata(intf, NULL);324 325 /* usb unregister device */326 usb_deregister_dev(intf, &as102_usb_class_driver);327 328 /* decrement usage counter */329 kref_put(&as102_dev->kref, as102_usb_release);330 331 pr_info("%s: device has been disconnected\n", DRIVER_NAME);332}333 334static int as102_usb_probe(struct usb_interface *intf,335 const struct usb_device_id *id)336{337 int ret;338 struct as102_dev_t *as102_dev;339 int i;340 341 /* This should never actually happen */342 if (ARRAY_SIZE(as102_usb_id_table) !=343 (sizeof(as102_device_names) / sizeof(const char *))) {344 pr_err("Device names table invalid size");345 return -EINVAL;346 }347 348 as102_dev = kzalloc(sizeof(struct as102_dev_t), GFP_KERNEL);349 if (as102_dev == NULL)350 return -ENOMEM;351 352 /* Assign the user-friendly device name */353 for (i = 0; i < ARRAY_SIZE(as102_usb_id_table); i++) {354 if (id == &as102_usb_id_table[i]) {355 as102_dev->name = as102_device_names[i];356 as102_dev->elna_cfg = as102_elna_cfg[i];357 }358 }359 360 if (as102_dev->name == NULL)361 as102_dev->name = "Unknown AS102 device";362 363 /* set private callback functions */364 as102_dev->bus_adap.ops = &as102_priv_ops;365 366 /* init cmd token for usb bus */367 as102_dev->bus_adap.cmd = &as102_dev->bus_adap.token.usb.c;368 as102_dev->bus_adap.rsp = &as102_dev->bus_adap.token.usb.r;369 370 /* init kernel device reference */371 kref_init(&as102_dev->kref);372 373 /* store as102 device to usb_device private data */374 usb_set_intfdata(intf, (void *) as102_dev);375 376 /* store in as102 device the usb_device pointer */377 as102_dev->bus_adap.usb_dev = usb_get_dev(interface_to_usbdev(intf));378 379 /* we can register the device now, as it is ready */380 ret = usb_register_dev(intf, &as102_usb_class_driver);381 if (ret < 0) {382 /* something prevented us from registering this driver */383 dev_err(&intf->dev,384 "%s: usb_register_dev() failed (errno = %d)\n",385 __func__, ret);386 goto failed;387 }388 389 pr_info("%s: device has been detected\n", DRIVER_NAME);390 391 /* request buffer allocation for streaming */392 ret = as102_alloc_usb_stream_buffer(as102_dev);393 if (ret != 0)394 goto failed_stream;395 396 /* register dvb layer */397 ret = as102_dvb_register(as102_dev);398 if (ret != 0)399 goto failed_dvb;400 401 return ret;402 403failed_dvb:404 as102_free_usb_stream_buffer(as102_dev);405failed_stream:406 usb_deregister_dev(intf, &as102_usb_class_driver);407failed:408 usb_put_dev(as102_dev->bus_adap.usb_dev);409 usb_set_intfdata(intf, NULL);410 kfree(as102_dev);411 return ret;412}413 414static int as102_open(struct inode *inode, struct file *file)415{416 int ret = 0, minor = 0;417 struct usb_interface *intf = NULL;418 struct as102_dev_t *dev = NULL;419 420 /* read minor from inode */421 minor = iminor(inode);422 423 /* fetch device from usb interface */424 intf = usb_find_interface(&as102_usb_driver, minor);425 if (intf == NULL) {426 pr_err("%s: can't find device for minor %d\n",427 __func__, minor);428 ret = -ENODEV;429 goto exit;430 }431 432 /* get our device */433 dev = usb_get_intfdata(intf);434 if (dev == NULL) {435 ret = -EFAULT;436 goto exit;437 }438 439 /* save our device object in the file's private structure */440 file->private_data = dev;441 442 /* increment our usage count for the device */443 kref_get(&dev->kref);444 445exit:446 return ret;447}448 449static int as102_release(struct inode *inode, struct file *file)450{451 struct as102_dev_t *dev = NULL;452 453 dev = file->private_data;454 if (dev != NULL) {455 /* decrement the count on our device */456 kref_put(&dev->kref, as102_usb_release);457 }458 459 return 0;460}461 462MODULE_DEVICE_TABLE(usb, as102_usb_id_table);463