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Pierrick Hascoet41b44e02011-10-31 12:24:39 -03001/*
2 * Abilis Systems Single DVB-T Receiver
3 * Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com>
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -03004 * Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
Pierrick Hascoet41b44e02011-10-31 12:24:39 -03005 *
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.
Pierrick Hascoet41b44e02011-10-31 12:24:39 -030015 */
16#include <linux/kernel.h>
17#include <linux/errno.h>
18#include <linux/slab.h>
19#include <linux/mm.h>
20#include <linux/usb.h>
21
22#include "as102_drv.h"
23#include "as102_usb_drv.h"
24#include "as102_fw.h"
25
26static void as102_usb_disconnect(struct usb_interface *interface);
27static int as102_usb_probe(struct usb_interface *interface,
28 const struct usb_device_id *id);
29
30static int as102_usb_start_stream(struct as102_dev_t *dev);
31static void as102_usb_stop_stream(struct as102_dev_t *dev);
32
33static int as102_open(struct inode *inode, struct file *file);
34static int as102_release(struct inode *inode, struct file *file);
35
36static struct usb_device_id as102_usb_id_table[] = {
37 { USB_DEVICE(AS102_USB_DEVICE_VENDOR_ID, AS102_USB_DEVICE_PID_0001) },
38 { USB_DEVICE(PCTV_74E_USB_VID, PCTV_74E_USB_PID) },
Devin Heitmueller5f9745b2011-10-31 12:24:47 -030039 { USB_DEVICE(ELGATO_EYETV_DTT_USB_VID, ELGATO_EYETV_DTT_USB_PID) },
Piotr Chmura8be62e72011-10-31 12:24:53 -030040 { USB_DEVICE(NBOX_DVBT_DONGLE_USB_VID, NBOX_DVBT_DONGLE_USB_PID) },
Gianluca Gennaridd7aaa42011-11-17 12:35:05 -030041 { USB_DEVICE(SKY_IT_DIGITAL_KEY_USB_VID, SKY_IT_DIGITAL_KEY_USB_PID) },
Pierrick Hascoet41b44e02011-10-31 12:24:39 -030042 { } /* Terminating entry */
43};
44
Devin Heitmueller4f7b7c02011-10-31 12:24:48 -030045/* Note that this table must always have the same number of entries as the
46 as102_usb_id_table struct */
Sylwester Nawrockid758b9e2011-11-06 16:31:49 -030047static const char * const as102_device_names[] = {
Devin Heitmueller4f7b7c02011-10-31 12:24:48 -030048 AS102_REFERENCE_DESIGN,
49 AS102_PCTV_74E,
50 AS102_ELGATO_EYETV_DTT_NAME,
Piotr Chmura8be62e72011-10-31 12:24:53 -030051 AS102_NBOX_DVBT_DONGLE_NAME,
Gianluca Gennaridd7aaa42011-11-17 12:35:05 -030052 AS102_SKY_IT_DIGITAL_KEY_NAME,
Devin Heitmueller4f7b7c02011-10-31 12:24:48 -030053 NULL /* Terminating entry */
54};
55
Gianluca Gennariabfac0b2012-03-06 09:47:46 -030056/* eLNA configuration: devices built on the reference design work best
57 with 0xA0, while custom designs seem to require 0xC0 */
58static uint8_t const as102_elna_cfg[] = {
59 0xA0,
60 0xC0,
61 0xC0,
62 0xA0,
63 0xA0,
64 0x00 /* Terminating entry */
65};
66
Pierrick Hascoet41b44e02011-10-31 12:24:39 -030067struct usb_driver as102_usb_driver = {
Sylwester Nawrocki14e0e4b2011-11-06 16:31:44 -030068 .name = DRIVER_FULL_NAME,
69 .probe = as102_usb_probe,
70 .disconnect = as102_usb_disconnect,
71 .id_table = as102_usb_id_table
Pierrick Hascoet41b44e02011-10-31 12:24:39 -030072};
73
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -030074static const struct file_operations as102_dev_fops = {
Sylwester Nawrocki14e0e4b2011-11-06 16:31:44 -030075 .owner = THIS_MODULE,
76 .open = as102_open,
77 .release = as102_release,
Pierrick Hascoet41b44e02011-10-31 12:24:39 -030078};
79
80static struct usb_class_driver as102_usb_class_driver = {
81 .name = "aton2-%d",
82 .fops = &as102_dev_fops,
83 .minor_base = AS102_DEVICE_MAJOR,
84};
85
Sylwester Nawrocki34490a02011-11-06 16:31:50 -030086static int as102_usb_xfer_cmd(struct as10x_bus_adapter_t *bus_adap,
Pierrick Hascoet41b44e02011-10-31 12:24:39 -030087 unsigned char *send_buf, int send_buf_len,
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -030088 unsigned char *recv_buf, int recv_buf_len)
89{
Pierrick Hascoet41b44e02011-10-31 12:24:39 -030090 int ret = 0;
Pierrick Hascoet41b44e02011-10-31 12:24:39 -030091
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -030092 if (send_buf != NULL) {
Pierrick Hascoet41b44e02011-10-31 12:24:39 -030093 ret = usb_control_msg(bus_adap->usb_dev,
94 usb_sndctrlpipe(bus_adap->usb_dev, 0),
95 AS102_USB_DEVICE_TX_CTRL_CMD,
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -030096 USB_DIR_OUT | USB_TYPE_VENDOR |
97 USB_RECIP_DEVICE,
Pierrick Hascoet41b44e02011-10-31 12:24:39 -030098 bus_adap->cmd_xid, /* value */
99 0, /* index */
100 send_buf, send_buf_len,
101 USB_CTRL_SET_TIMEOUT /* 200 */);
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300102 if (ret < 0) {
Martin Kepplinger2179de62014-08-04 08:13:16 -0300103 dev_dbg(&bus_adap->usb_dev->dev,
104 "usb_control_msg(send) failed, err %i\n", ret);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300105 return ret;
106 }
107
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300108 if (ret != send_buf_len) {
Martin Kepplinger2179de62014-08-04 08:13:16 -0300109 dev_dbg(&bus_adap->usb_dev->dev,
110 "only wrote %d of %d bytes\n", ret, send_buf_len);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300111 return -1;
112 }
113 }
114
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300115 if (recv_buf != NULL) {
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300116#ifdef TRACE
Martin Kepplinger2179de62014-08-04 08:13:16 -0300117 dev_dbg(bus_adap->usb_dev->dev,
118 "want to read: %d bytes\n", recv_buf_len);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300119#endif
120 ret = usb_control_msg(bus_adap->usb_dev,
121 usb_rcvctrlpipe(bus_adap->usb_dev, 0),
122 AS102_USB_DEVICE_RX_CTRL_CMD,
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300123 USB_DIR_IN | USB_TYPE_VENDOR |
124 USB_RECIP_DEVICE,
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300125 bus_adap->cmd_xid, /* value */
126 0, /* index */
127 recv_buf, recv_buf_len,
128 USB_CTRL_GET_TIMEOUT /* 200 */);
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300129 if (ret < 0) {
Martin Kepplinger2179de62014-08-04 08:13:16 -0300130 dev_dbg(&bus_adap->usb_dev->dev,
131 "usb_control_msg(recv) failed, err %i\n", ret);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300132 return ret;
133 }
134#ifdef TRACE
Martin Kepplinger2179de62014-08-04 08:13:16 -0300135 dev_dbg(bus_adap->usb_dev->dev,
136 "read %d bytes\n", recv_buf_len);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300137#endif
138 }
139
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300140 return ret;
141}
142
Sylwester Nawrocki34490a02011-11-06 16:31:50 -0300143static int as102_send_ep1(struct as10x_bus_adapter_t *bus_adap,
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300144 unsigned char *send_buf,
145 int send_buf_len,
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300146 int swap32)
147{
Dan Carpenter271430e2014-09-22 04:58:53 -0300148 int ret, actual_len;
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300149
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300150 ret = usb_bulk_msg(bus_adap->usb_dev,
151 usb_sndbulkpipe(bus_adap->usb_dev, 1),
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300152 send_buf, send_buf_len, &actual_len, 200);
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300153 if (ret) {
Martin Kepplinger2179de62014-08-04 08:13:16 -0300154 dev_dbg(&bus_adap->usb_dev->dev,
155 "usb_bulk_msg(send) failed, err %i\n", ret);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300156 return ret;
157 }
158
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300159 if (actual_len != send_buf_len) {
Martin Kepplinger2179de62014-08-04 08:13:16 -0300160 dev_dbg(&bus_adap->usb_dev->dev, "only wrote %d of %d bytes\n",
161 actual_len, send_buf_len);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300162 return -1;
163 }
Dan Carpenter271430e2014-09-22 04:58:53 -0300164 return actual_len;
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300165}
166
Sylwester Nawrocki34490a02011-11-06 16:31:50 -0300167static int as102_read_ep2(struct as10x_bus_adapter_t *bus_adap,
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300168 unsigned char *recv_buf, int recv_buf_len)
169{
Dan Carpenter271430e2014-09-22 04:58:53 -0300170 int ret, actual_len;
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300171
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300172 if (recv_buf == NULL)
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300173 return -EINVAL;
174
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300175 ret = usb_bulk_msg(bus_adap->usb_dev,
176 usb_rcvbulkpipe(bus_adap->usb_dev, 2),
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300177 recv_buf, recv_buf_len, &actual_len, 200);
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300178 if (ret) {
Martin Kepplinger2179de62014-08-04 08:13:16 -0300179 dev_dbg(&bus_adap->usb_dev->dev,
180 "usb_bulk_msg(recv) failed, err %i\n", ret);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300181 return ret;
182 }
183
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300184 if (actual_len != recv_buf_len) {
Martin Kepplinger2179de62014-08-04 08:13:16 -0300185 dev_dbg(&bus_adap->usb_dev->dev, "only read %d of %d bytes\n",
186 actual_len, recv_buf_len);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300187 return -1;
188 }
Dan Carpenter271430e2014-09-22 04:58:53 -0300189 return actual_len;
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300190}
191
Julia Lawallf691ba92015-12-06 13:51:38 -0200192static const struct as102_priv_ops_t as102_priv_ops = {
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300193 .upload_fw_pkt = as102_send_ep1,
194 .xfer_cmd = as102_usb_xfer_cmd,
195 .as102_read_ep2 = as102_read_ep2,
196 .start_stream = as102_usb_start_stream,
197 .stop_stream = as102_usb_stop_stream,
198};
199
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300200static int as102_submit_urb_stream(struct as102_dev_t *dev, struct urb *urb)
201{
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300202 int err;
203
204 usb_fill_bulk_urb(urb,
205 dev->bus_adap.usb_dev,
206 usb_rcvbulkpipe(dev->bus_adap.usb_dev, 0x2),
207 urb->transfer_buffer,
208 AS102_USB_BUF_SIZE,
209 as102_urb_stream_irq,
210 dev);
211
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300212 err = usb_submit_urb(urb, GFP_ATOMIC);
213 if (err)
Martin Kepplinger2179de62014-08-04 08:13:16 -0300214 dev_dbg(&urb->dev->dev,
215 "%s: usb_submit_urb failed\n", __func__);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300216
217 return err;
218}
219
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300220void as102_urb_stream_irq(struct urb *urb)
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300221{
222 struct as102_dev_t *as102_dev = urb->context;
223
224 if (urb->actual_length > 0) {
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300225 dvb_dmx_swfilter(&as102_dev->dvb_dmx,
226 urb->transfer_buffer,
227 urb->actual_length);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300228 } else {
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300229 if (urb->actual_length == 0)
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300230 memset(urb->transfer_buffer, 0, AS102_USB_BUF_SIZE);
231 }
232
233 /* is not stopped, re-submit urb */
234 if (as102_dev->streaming)
235 as102_submit_urb_stream(as102_dev, urb);
236}
237
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300238static void as102_free_usb_stream_buffer(struct as102_dev_t *dev)
239{
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300240 int i;
241
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300242 for (i = 0; i < MAX_STREAM_URB; i++)
243 usb_free_urb(dev->stream_urb[i]);
244
Piotr Chmura9d8e18b2011-10-31 12:24:52 -0300245 usb_free_coherent(dev->bus_adap.usb_dev,
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300246 MAX_STREAM_URB * AS102_USB_BUF_SIZE,
247 dev->stream,
248 dev->dma_addr);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300249}
250
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300251static int as102_alloc_usb_stream_buffer(struct as102_dev_t *dev)
252{
Peter Senna Tschudin444f8bd2014-05-20 07:33:46 -0300253 int i;
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300254
Piotr Chmura9d8e18b2011-10-31 12:24:52 -0300255 dev->stream = usb_alloc_coherent(dev->bus_adap.usb_dev,
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300256 MAX_STREAM_URB * AS102_USB_BUF_SIZE,
257 GFP_KERNEL,
258 &dev->dma_addr);
259 if (!dev->stream) {
Martin Kepplinger2179de62014-08-04 08:13:16 -0300260 dev_dbg(&dev->bus_adap.usb_dev->dev,
261 "%s: usb_buffer_alloc failed\n", __func__);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300262 return -ENOMEM;
263 }
264
265 memset(dev->stream, 0, MAX_STREAM_URB * AS102_USB_BUF_SIZE);
266
267 /* init urb buffers */
268 for (i = 0; i < MAX_STREAM_URB; i++) {
269 struct urb *urb;
270
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300271 urb = usb_alloc_urb(0, GFP_ATOMIC);
272 if (urb == NULL) {
Martin Kepplinger2179de62014-08-04 08:13:16 -0300273 dev_dbg(&dev->bus_adap.usb_dev->dev,
274 "%s: usb_alloc_urb failed\n", __func__);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300275 as102_free_usb_stream_buffer(dev);
276 return -ENOMEM;
277 }
278
279 urb->transfer_buffer = dev->stream + (i * AS102_USB_BUF_SIZE);
Gianluca Gennarif8f7be02012-02-14 09:25:00 -0300280 urb->transfer_dma = dev->dma_addr + (i * AS102_USB_BUF_SIZE);
281 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300282 urb->transfer_buffer_length = AS102_USB_BUF_SIZE;
283
284 dev->stream_urb[i] = urb;
285 }
Peter Senna Tschudin444f8bd2014-05-20 07:33:46 -0300286 return 0;
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300287}
288
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300289static void as102_usb_stop_stream(struct as102_dev_t *dev)
290{
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300291 int i;
292
293 for (i = 0; i < MAX_STREAM_URB; i++)
294 usb_kill_urb(dev->stream_urb[i]);
295}
296
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300297static int as102_usb_start_stream(struct as102_dev_t *dev)
298{
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300299 int i, ret = 0;
300
301 for (i = 0; i < MAX_STREAM_URB; i++) {
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300302 ret = as102_submit_urb_stream(dev, dev->stream_urb[i]);
303 if (ret) {
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300304 as102_usb_stop_stream(dev);
305 return ret;
306 }
307 }
308
309 return 0;
310}
311
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300312static void as102_usb_release(struct kref *kref)
313{
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300314 struct as102_dev_t *as102_dev;
315
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300316 as102_dev = container_of(kref, struct as102_dev_t, kref);
317 if (as102_dev != NULL) {
318 usb_put_dev(as102_dev->bus_adap.usb_dev);
319 kfree(as102_dev);
320 }
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300321}
322
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300323static void as102_usb_disconnect(struct usb_interface *intf)
324{
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300325 struct as102_dev_t *as102_dev;
326
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300327 /* extract as102_dev_t from usb_device private data */
328 as102_dev = usb_get_intfdata(intf);
329
330 /* unregister dvb layer */
331 as102_dvb_unregister(as102_dev);
332
333 /* free usb buffers */
334 as102_free_usb_stream_buffer(as102_dev);
335
336 usb_set_intfdata(intf, NULL);
337
338 /* usb unregister device */
339 usb_deregister_dev(intf, &as102_usb_class_driver);
340
341 /* decrement usage counter */
342 kref_put(&as102_dev->kref, as102_usb_release);
343
Sylwester Nawrocki7d462fe2011-11-06 16:31:45 -0300344 pr_info("%s: device has been disconnected\n", DRIVER_NAME);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300345}
346
347static int as102_usb_probe(struct usb_interface *intf,
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300348 const struct usb_device_id *id)
349{
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300350 int ret;
351 struct as102_dev_t *as102_dev;
Devin Heitmueller4f7b7c02011-10-31 12:24:48 -0300352 int i;
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300353
Devin Heitmueller4f7b7c02011-10-31 12:24:48 -0300354 /* This should never actually happen */
Jim Cromieb330f602012-04-10 16:06:41 -0600355 if (ARRAY_SIZE(as102_usb_id_table) !=
Devin Heitmueller4f7b7c02011-10-31 12:24:48 -0300356 (sizeof(as102_device_names) / sizeof(const char *))) {
Sylwester Nawrocki7d462fe2011-11-06 16:31:45 -0300357 pr_err("Device names table invalid size");
Devin Heitmueller4f7b7c02011-10-31 12:24:48 -0300358 return -EINVAL;
359 }
360
Julia Lawalleabd0ea2011-12-23 13:39:34 -0300361 as102_dev = kzalloc(sizeof(struct as102_dev_t), GFP_KERNEL);
Joe Perches535ec042013-02-11 14:38:05 -0300362 if (as102_dev == NULL)
Julia Lawalleabd0ea2011-12-23 13:39:34 -0300363 return -ENOMEM;
Julia Lawalleabd0ea2011-12-23 13:39:34 -0300364
Devin Heitmueller4f7b7c02011-10-31 12:24:48 -0300365 /* Assign the user-friendly device name */
Jim Cromieb330f602012-04-10 16:06:41 -0600366 for (i = 0; i < ARRAY_SIZE(as102_usb_id_table); i++) {
Gianluca Gennariabfac0b2012-03-06 09:47:46 -0300367 if (id == &as102_usb_id_table[i]) {
Devin Heitmueller4f7b7c02011-10-31 12:24:48 -0300368 as102_dev->name = as102_device_names[i];
Gianluca Gennariabfac0b2012-03-06 09:47:46 -0300369 as102_dev->elna_cfg = as102_elna_cfg[i];
370 }
Devin Heitmueller4f7b7c02011-10-31 12:24:48 -0300371 }
372
373 if (as102_dev->name == NULL)
374 as102_dev->name = "Unknown AS102 device";
375
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300376 /* set private callback functions */
377 as102_dev->bus_adap.ops = &as102_priv_ops;
378
379 /* init cmd token for usb bus */
380 as102_dev->bus_adap.cmd = &as102_dev->bus_adap.token.usb.c;
381 as102_dev->bus_adap.rsp = &as102_dev->bus_adap.token.usb.r;
382
383 /* init kernel device reference */
384 kref_init(&as102_dev->kref);
385
386 /* store as102 device to usb_device private data */
387 usb_set_intfdata(intf, (void *) as102_dev);
388
389 /* store in as102 device the usb_device pointer */
390 as102_dev->bus_adap.usb_dev = usb_get_dev(interface_to_usbdev(intf));
391
392 /* we can register the device now, as it is ready */
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300393 ret = usb_register_dev(intf, &as102_usb_class_driver);
394 if (ret < 0) {
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300395 /* something prevented us from registering this driver */
Greg Kroah-Hartman80489262012-04-25 14:48:57 -0700396 dev_err(&intf->dev,
397 "%s: usb_register_dev() failed (errno = %d)\n",
398 __func__, ret);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300399 goto failed;
400 }
401
Sylwester Nawrocki7d462fe2011-11-06 16:31:45 -0300402 pr_info("%s: device has been detected\n", DRIVER_NAME);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300403
404 /* request buffer allocation for streaming */
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300405 ret = as102_alloc_usb_stream_buffer(as102_dev);
406 if (ret != 0)
Alexey Khoroshilovcd19f7d2013-12-27 18:18:39 -0300407 goto failed_stream;
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300408
409 /* register dvb layer */
410 ret = as102_dvb_register(as102_dev);
Alexey Khoroshilovcd19f7d2013-12-27 18:18:39 -0300411 if (ret != 0)
412 goto failed_dvb;
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300413
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300414 return ret;
415
Alexey Khoroshilovcd19f7d2013-12-27 18:18:39 -0300416failed_dvb:
417 as102_free_usb_stream_buffer(as102_dev);
418failed_stream:
419 usb_deregister_dev(intf, &as102_usb_class_driver);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300420failed:
Alexey Khoroshilovcd19f7d2013-12-27 18:18:39 -0300421 usb_put_dev(as102_dev->bus_adap.usb_dev);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300422 usb_set_intfdata(intf, NULL);
423 kfree(as102_dev);
424 return ret;
425}
426
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300427static int as102_open(struct inode *inode, struct file *file)
428{
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300429 int ret = 0, minor = 0;
430 struct usb_interface *intf = NULL;
431 struct as102_dev_t *dev = NULL;
432
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300433 /* read minor from inode */
434 minor = iminor(inode);
435
436 /* fetch device from usb interface */
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300437 intf = usb_find_interface(&as102_usb_driver, minor);
438 if (intf == NULL) {
Sylwester Nawrocki7d462fe2011-11-06 16:31:45 -0300439 pr_err("%s: can't find device for minor %d\n",
440 __func__, minor);
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300441 ret = -ENODEV;
442 goto exit;
443 }
444
445 /* get our device */
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300446 dev = usb_get_intfdata(intf);
447 if (dev == NULL) {
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300448 ret = -EFAULT;
449 goto exit;
450 }
451
452 /* save our device object in the file's private structure */
453 file->private_data = dev;
454
455 /* increment our usage count for the device */
456 kref_get(&dev->kref);
457
458exit:
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300459 return ret;
460}
461
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300462static int as102_release(struct inode *inode, struct file *file)
463{
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300464 struct as102_dev_t *dev = NULL;
465
Devin Heitmuellerc7a6c002011-10-31 12:24:45 -0300466 dev = file->private_data;
467 if (dev != NULL) {
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300468 /* decrement the count on our device */
469 kref_put(&dev->kref, as102_usb_release);
470 }
471
Peter Senna Tschudin444f8bd2014-05-20 07:33:46 -0300472 return 0;
Pierrick Hascoet41b44e02011-10-31 12:24:39 -0300473}
474
475MODULE_DEVICE_TABLE(usb, as102_usb_id_table);