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11#include "dvb-usb-common.h"
12
13
14static void usb_urb_complete(struct urb *urb)
15{
16 struct usb_data_stream *stream = urb->context;
17 int ptype = usb_pipetype(urb->pipe);
18 int i;
19 u8 *b;
20
21 deb_uxfer("'%s' urb completed. status: %d, length: %d/%d, pack_num: %d, errors: %d\n",
22 ptype == PIPE_ISOCHRONOUS ? "isoc" : "bulk",
23 urb->status,urb->actual_length,urb->transfer_buffer_length,
24 urb->number_of_packets,urb->error_count);
25
26 switch (urb->status) {
27 case 0:
28 case -ETIMEDOUT:
29 break;
30 case -ECONNRESET:
31 case -ENOENT:
32 case -ESHUTDOWN:
33 return;
34 default:
35 deb_ts("urb completition error %d.\n", urb->status);
36 break;
37 }
38
39 b = (u8 *) urb->transfer_buffer;
40 switch (ptype) {
41 case PIPE_ISOCHRONOUS:
42 for (i = 0; i < urb->number_of_packets; i++) {
43
44 if (urb->iso_frame_desc[i].status != 0)
45 deb_ts("iso frame descriptor has an error: %d\n",urb->iso_frame_desc[i].status);
46 else if (urb->iso_frame_desc[i].actual_length > 0)
47 stream->complete(stream, b + urb->iso_frame_desc[i].offset, urb->iso_frame_desc[i].actual_length);
48
49 urb->iso_frame_desc[i].status = 0;
50 urb->iso_frame_desc[i].actual_length = 0;
51 }
52 debug_dump(b,20,deb_uxfer);
53 break;
54 case PIPE_BULK:
55 if (urb->actual_length > 0)
56 stream->complete(stream, b, urb->actual_length);
57 break;
58 default:
59 err("unkown endpoint type in completition handler.");
60 return;
61 }
62 usb_submit_urb(urb,GFP_ATOMIC);
63}
64
65int usb_urb_kill(struct usb_data_stream *stream)
66{
67 int i;
68 for (i = 0; i < stream->urbs_submitted; i++) {
69 deb_ts("killing URB no. %d.\n",i);
70
71
72 usb_kill_urb(stream->urb_list[i]);
73 }
74 stream->urbs_submitted = 0;
75 return 0;
76}
77
78int usb_urb_submit(struct usb_data_stream *stream)
79{
80 int i,ret;
81 for (i = 0; i < stream->urbs_initialized; i++) {
82 deb_ts("submitting URB no. %d\n",i);
83 if ((ret = usb_submit_urb(stream->urb_list[i],GFP_ATOMIC))) {
84 err("could not submit URB no. %d - get them all back",i);
85 usb_urb_kill(stream);
86 return ret;
87 }
88 stream->urbs_submitted++;
89 }
90 return 0;
91}
92
93static int usb_free_stream_buffers(struct usb_data_stream *stream)
94{
95 if (stream->state & USB_STATE_URB_BUF) {
96 while (stream->buf_num) {
97 stream->buf_num--;
98 deb_mem("freeing buffer %d\n",stream->buf_num);
99 usb_buffer_free(stream->udev, stream->buf_size,
100 stream->buf_list[stream->buf_num], stream->dma_addr[stream->buf_num]);
101 }
102 }
103
104 stream->state &= ~USB_STATE_URB_BUF;
105
106 return 0;
107}
108
109static int usb_allocate_stream_buffers(struct usb_data_stream *stream, int num, unsigned long size)
110{
111 stream->buf_num = 0;
112 stream->buf_size = size;
113
114 deb_mem("all in all I will use %lu bytes for streaming\n",num*size);
115
116 for (stream->buf_num = 0; stream->buf_num < num; stream->buf_num++) {
117 deb_mem("allocating buffer %d\n",stream->buf_num);
118 if (( stream->buf_list[stream->buf_num] =
119 usb_buffer_alloc(stream->udev, size, GFP_ATOMIC,
120 &stream->dma_addr[stream->buf_num]) ) == NULL) {
121 deb_mem("not enough memory for urb-buffer allocation.\n");
122 usb_free_stream_buffers(stream);
123 return -ENOMEM;
124 }
125 deb_mem("buffer %d: %p (dma: %Lu)\n",
126 stream->buf_num,
127stream->buf_list[stream->buf_num], (long long)stream->dma_addr[stream->buf_num]);
128 memset(stream->buf_list[stream->buf_num],0,size);
129 stream->state |= USB_STATE_URB_BUF;
130 }
131 deb_mem("allocation successful\n");
132
133 return 0;
134}
135
136static int usb_bulk_urb_init(struct usb_data_stream *stream)
137{
138 int i, j;
139
140 if ((i = usb_allocate_stream_buffers(stream,stream->props.count,
141 stream->props.u.bulk.buffersize)) < 0)
142 return i;
143
144
145 for (i = 0; i < stream->props.count; i++) {
146 stream->urb_list[i] = usb_alloc_urb(0, GFP_ATOMIC);
147 if (!stream->urb_list[i]) {
148 deb_mem("not enough memory for urb_alloc_urb!.\n");
149 for (j = 0; j < i; j++)
150 usb_free_urb(stream->urb_list[i]);
151 return -ENOMEM;
152 }
153 usb_fill_bulk_urb( stream->urb_list[i], stream->udev,
154 usb_rcvbulkpipe(stream->udev,stream->props.endpoint),
155 stream->buf_list[i],
156 stream->props.u.bulk.buffersize,
157 usb_urb_complete, stream);
158
159 stream->urb_list[i]->transfer_flags = 0;
160 stream->urbs_initialized++;
161 }
162 return 0;
163}
164
165static int usb_isoc_urb_init(struct usb_data_stream *stream)
166{
167 int i,j;
168
169 if ((i = usb_allocate_stream_buffers(stream,stream->props.count,
170 stream->props.u.isoc.framesize*stream->props.u.isoc.framesperurb)) < 0)
171 return i;
172
173
174 for (i = 0; i < stream->props.count; i++) {
175 struct urb *urb;
176 int frame_offset = 0;
177
178 stream->urb_list[i] = usb_alloc_urb(stream->props.u.isoc.framesperurb, GFP_ATOMIC);
179 if (!stream->urb_list[i]) {
180 deb_mem("not enough memory for urb_alloc_urb!\n");
181 for (j = 0; j < i; j++)
182 usb_free_urb(stream->urb_list[i]);
183 return -ENOMEM;
184 }
185
186 urb = stream->urb_list[i];
187
188 urb->dev = stream->udev;
189 urb->context = stream;
190 urb->complete = usb_urb_complete;
191 urb->pipe = usb_rcvisocpipe(stream->udev,stream->props.endpoint);
192 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
193 urb->interval = stream->props.u.isoc.interval;
194 urb->number_of_packets = stream->props.u.isoc.framesperurb;
195 urb->transfer_buffer_length = stream->buf_size;
196 urb->transfer_buffer = stream->buf_list[i];
197 urb->transfer_dma = stream->dma_addr[i];
198
199 for (j = 0; j < stream->props.u.isoc.framesperurb; j++) {
200 urb->iso_frame_desc[j].offset = frame_offset;
201 urb->iso_frame_desc[j].length = stream->props.u.isoc.framesize;
202 frame_offset += stream->props.u.isoc.framesize;
203 }
204
205 stream->urbs_initialized++;
206 }
207 return 0;
208}
209
210int usb_urb_init(struct usb_data_stream *stream, struct usb_data_stream_properties *props)
211{
212 if (stream == NULL || props == NULL)
213 return -EINVAL;
214
215 memcpy(&stream->props, props, sizeof(*props));
216
217 usb_clear_halt(stream->udev,usb_rcvbulkpipe(stream->udev,stream->props.endpoint));
218
219 if (stream->complete == NULL) {
220 err("there is no data callback - this doesn't make sense.");
221 return -EINVAL;
222 }
223
224 switch (stream->props.type) {
225 case USB_BULK:
226 return usb_bulk_urb_init(stream);
227 case USB_ISOC:
228 return usb_isoc_urb_init(stream);
229 default:
230 err("unkown URB-type for data transfer.");
231 return -EINVAL;
232 }
233}
234
235int usb_urb_exit(struct usb_data_stream *stream)
236{
237 int i;
238
239 usb_urb_kill(stream);
240
241 for (i = 0; i < stream->urbs_initialized; i++) {
242 if (stream->urb_list[i] != NULL) {
243 deb_mem("freeing URB no. %d.\n",i);
244
245 usb_free_urb(stream->urb_list[i]);
246 }
247 }
248 stream->urbs_initialized = 0;
249
250 usb_free_stream_buffers(stream);
251 return 0;
252}
253
