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<h1>stk11xx-buf.c</h1><a href="stk11xx-buf_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
<a name="l00034"></a>00034 <span class="preprocessor">#include <linux/module.h></span>
<a name="l00035"></a>00035 <span class="preprocessor">#include <linux/init.h></span>
<a name="l00036"></a>00036 <span class="preprocessor">#include <linux/kernel.h></span>
<a name="l00037"></a>00037 <span class="preprocessor">#include <linux/version.h></span>
<a name="l00038"></a>00038 <span class="preprocessor">#include <linux/errno.h></span>
<a name="l00039"></a>00039 <span class="preprocessor">#include <linux/slab.h></span>
<a name="l00040"></a>00040 <span class="preprocessor">#include <linux/kref.h></span>
<a name="l00041"></a>00041 <span class="preprocessor">#include <linux/vmalloc.h></span>
<a name="l00042"></a>00042 <span class="preprocessor">#include <linux/mm.h></span>
<a name="l00043"></a>00043
<a name="l00044"></a>00044 <span class="preprocessor">#include <linux/usb.h></span>
<a name="l00045"></a>00045 <span class="preprocessor">#include <media/v4l2-common.h></span>
<a name="l00046"></a>00046 <span class="preprocessor">#include <media/v4l2-ioctl.h></span>
<a name="l00047"></a>00047
<a name="l00048"></a>00048 <span class="preprocessor">#include "<a class="code" href="stk11xx_8h.html" title="Driver for Syntek USB video camera.">stk11xx.h</a>"</span>
<a name="l00049"></a>00049
<a name="l00050"></a>00050
<a name="l00055"></a><a class="code" href="stk11xx-buf_8c.html#385b5670ebc09051672b831ac96d7e9d">00055</a> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="stk11xx-buf_8c.html#385b5670ebc09051672b831ac96d7e9d">default_nbrframebuf</a> = 3;
<a name="l00056"></a>00056
<a name="l00057"></a>00057
<a name="l00067"></a><a class="code" href="stk11xx-buf_8c.html#b4a4e3bb8dfa019f796d69aa219ab036">00067</a> <span class="keywordtype">void</span> * <a class="code" href="stk11xx-buf_8c.html#b4a4e3bb8dfa019f796d69aa219ab036" title="Allocate a buffer.">stk11xx_rvmalloc</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> size)
<a name="l00068"></a>00068 {
<a name="l00069"></a>00069 <span class="keywordtype">void</span> *mem;
<a name="l00070"></a>00070 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> addr;
<a name="l00071"></a>00071
<a name="l00072"></a>00072 size = PAGE_ALIGN(size);
<a name="l00073"></a>00073 mem = vmalloc_32(size);
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="keywordflow">if</span> (!mem)
<a name="l00076"></a>00076 <span class="keywordflow">return</span> NULL;
<a name="l00077"></a>00077
<a name="l00078"></a>00078 memset(mem, 0, size);
<a name="l00079"></a>00079
<a name="l00080"></a>00080 addr = (<span class="keywordtype">unsigned</span> long) mem;
<a name="l00081"></a>00081
<a name="l00082"></a>00082 <span class="keywordflow">while</span> (size > 0) {
<a name="l00083"></a>00083 SetPageReserved(vmalloc_to_page((<span class="keywordtype">void</span> *) addr));
<a name="l00084"></a>00084 addr += PAGE_SIZE;
<a name="l00085"></a>00085 size -= PAGE_SIZE;
<a name="l00086"></a>00086 }
<a name="l00087"></a>00087
<a name="l00088"></a>00088 <span class="keywordflow">return</span> mem;
<a name="l00089"></a>00089 }
<a name="l00090"></a>00090
<a name="l00091"></a>00091
<a name="l00100"></a><a class="code" href="stk11xx-buf_8c.html#8280ec87ea86b172bf3b44394a243158">00100</a> <span class="keywordtype">void</span> <a class="code" href="stk11xx-buf_8c.html#8280ec87ea86b172bf3b44394a243158" title="Free a buffer.">stk11xx_rvfree</a>(<span class="keywordtype">void</span> *mem, <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> size)
<a name="l00101"></a>00101 {
<a name="l00102"></a>00102 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> addr;
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <span class="keywordflow">if</span> (!mem)
<a name="l00105"></a>00105 <span class="keywordflow">return</span>;
<a name="l00106"></a>00106
<a name="l00107"></a>00107 addr = (<span class="keywordtype">unsigned</span> long) mem;
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <span class="keywordflow">while</span> ((<span class="keywordtype">long</span>) size > 0) {
<a name="l00110"></a>00110 ClearPageReserved(vmalloc_to_page((<span class="keywordtype">void</span> *) addr));
<a name="l00111"></a>00111 addr += PAGE_SIZE;
<a name="l00112"></a>00112 size -= PAGE_SIZE;
<a name="l00113"></a>00113 }
<a name="l00114"></a>00114
<a name="l00115"></a>00115 vfree(mem);
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117
<a name="l00118"></a>00118
<a name="l00128"></a><a class="code" href="stk11xx_8h.html#7d64c84f3004137bd930c9a53c312ab5">00128</a> <span class="keywordtype">int</span> <a class="code" href="stk11xx-buf_8c.html#a04b5e0d601d6e4bd6a5dd53579b9628" title="Allocate all ISOC buffers.">stk11xx_allocate_buffers</a>(<span class="keyword">struct</span> usb_stk11xx *dev)
<a name="l00129"></a>00129 {
<a name="l00130"></a>00130 <span class="keywordtype">int</span> i;
<a name="l00131"></a>00131 <span class="keywordtype">void</span> *kbuf;
<a name="l00132"></a>00132
<a name="l00133"></a>00133 <a class="code" href="stk11xx_8h.html#6a7ffe6803607fae5d467b1b4f5515f2">STK_DEBUG</a>(<span class="stringliteral">"Allocate video buffers\n"</span>);
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="keywordflow">if</span> (dev == NULL)
<a name="l00136"></a>00136 <span class="keywordflow">return</span> -ENXIO;
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="comment">// Allocate isochronous pipe buffers</span>
<a name="l00139"></a>00139 <span class="keywordflow">for</span> (i=0; i<<a class="code" href="stk11xx_8h.html#ac10237297a8b2b0665e56179c99b64f">MAX_ISO_BUFS</a>; i++) {
<a name="l00140"></a>00140 <span class="keywordflow">if</span> (dev->isobuf[i].data == NULL) {
<a name="l00141"></a>00141 kbuf = kzalloc(<a class="code" href="stk11xx_8h.html#845fc3faad4ba5aedfae60d91db77736">ISO_BUFFER_SIZE</a>, GFP_KERNEL);
<a name="l00142"></a>00142
<a name="l00143"></a>00143 <span class="keywordflow">if</span> (kbuf == NULL) {
<a name="l00144"></a>00144 <a class="code" href="stk11xx_8h.html#2548285f2eade14f8e93c9b611e622d7">STK_ERROR</a>(<span class="stringliteral">"Failed to allocate iso buffer %d\n"</span>, i);
<a name="l00145"></a>00145 <span class="keywordflow">return</span> -ENOMEM;
<a name="l00146"></a>00146 }
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <a class="code" href="stk11xx_8h.html#6a7ffe6803607fae5d467b1b4f5515f2">STK_DEBUG</a>(<span class="stringliteral">"Allocated iso buffer at %p\n"</span>, kbuf);
<a name="l00149"></a>00149
<a name="l00150"></a>00150 dev->isobuf[i].data = kbuf;
<a name="l00151"></a>00151 }
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153
<a name="l00154"></a>00154 <span class="comment">// Allocate frame buffer structure</span>
<a name="l00155"></a>00155 <span class="keywordflow">if</span> (dev->framebuf == NULL) {
<a name="l00156"></a>00156 kbuf = kzalloc(<a class="code" href="stk11xx-buf_8c.html#385b5670ebc09051672b831ac96d7e9d">default_nbrframebuf</a> * <span class="keyword">sizeof</span>(<span class="keyword">struct</span> stk11xx_frame_buf), GFP_KERNEL);
<a name="l00157"></a>00157
<a name="l00158"></a>00158 <span class="keywordflow">if</span> (kbuf == NULL) {
<a name="l00159"></a>00159 <a class="code" href="stk11xx_8h.html#2548285f2eade14f8e93c9b611e622d7">STK_ERROR</a>(<span class="stringliteral">"Failed to allocate frame buffer structure\n"</span>);
<a name="l00160"></a>00160 <span class="keywordflow">return</span> -ENOMEM;
<a name="l00161"></a>00161 }
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <a class="code" href="stk11xx_8h.html#6a7ffe6803607fae5d467b1b4f5515f2">STK_DEBUG</a>(<span class="stringliteral">"Allocated frame buffer structure at %p\n"</span>, kbuf);
<a name="l00164"></a>00164
<a name="l00165"></a>00165 dev->framebuf = kbuf;
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167
<a name="l00168"></a>00168 <span class="comment">// Create frame buffers and make circular ring</span>
<a name="l00169"></a>00169 <span class="keywordflow">for</span> (i=0; i<<a class="code" href="stk11xx-buf_8c.html#385b5670ebc09051672b831ac96d7e9d">default_nbrframebuf</a>; i++) {
<a name="l00170"></a>00170 <span class="keywordflow">if</span> (dev->framebuf[i].data == NULL) {
<a name="l00171"></a>00171 kbuf = vmalloc(<a class="code" href="stk11xx_8h.html#c866eee120e8f291a6130a26d252a425">STK11XX_FRAME_SIZE</a>);
<a name="l00172"></a>00172
<a name="l00173"></a>00173 <span class="keywordflow">if</span> (kbuf == NULL) {
<a name="l00174"></a>00174 <a class="code" href="stk11xx_8h.html#2548285f2eade14f8e93c9b611e622d7">STK_ERROR</a>(<span class="stringliteral">"Failed to allocate frame buffer %d\n"</span>, i);
<a name="l00175"></a>00175 <span class="keywordflow">return</span> -ENOMEM;
<a name="l00176"></a>00176 }
<a name="l00177"></a>00177
<a name="l00178"></a>00178 <a class="code" href="stk11xx_8h.html#6a7ffe6803607fae5d467b1b4f5515f2">STK_DEBUG</a>(<span class="stringliteral">"Allocated frame buffer %d at %p.\n"</span>, i, kbuf);
<a name="l00179"></a>00179
<a name="l00180"></a>00180 dev->framebuf[i].data = kbuf;
<a name="l00181"></a>00181 memset(kbuf, 0, <a class="code" href="stk11xx_8h.html#c866eee120e8f291a6130a26d252a425">STK11XX_FRAME_SIZE</a>);
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184
<a name="l00185"></a>00185 <span class="comment">// Allocate image buffer; double buffer for mmap()</span>
<a name="l00186"></a>00186 kbuf = <a class="code" href="stk11xx-buf_8c.html#b4a4e3bb8dfa019f796d69aa219ab036" title="Allocate a buffer.">stk11xx_rvmalloc</a>(dev->nbuffers * dev->len_per_image);
<a name="l00187"></a>00187
<a name="l00188"></a>00188 <span class="keywordflow">if</span> (kbuf == NULL) {
<a name="l00189"></a>00189 <a class="code" href="stk11xx_8h.html#2548285f2eade14f8e93c9b611e622d7">STK_ERROR</a>(<span class="stringliteral">"Failed to allocate image buffer(s). needed (%d)\n"</span>,
<a name="l00190"></a>00190 dev->nbuffers * dev->len_per_image);
<a name="l00191"></a>00191 <span class="keywordflow">return</span> -ENOMEM;
<a name="l00192"></a>00192 }
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <a class="code" href="stk11xx_8h.html#6a7ffe6803607fae5d467b1b4f5515f2">STK_DEBUG</a>(<span class="stringliteral">"Allocated image buffer at %p\n"</span>, kbuf);
<a name="l00195"></a>00195
<a name="l00196"></a>00196 dev->image_data = kbuf;
<a name="l00197"></a>00197
<a name="l00198"></a>00198 <span class="keywordflow">for</span> (i = 0; i < dev->nbuffers; i++) {
<a name="l00199"></a>00199 dev->images[i].offset = i * dev->len_per_image;
<a name="l00200"></a>00200 dev->images[i].vma_use_count = 0;
<a name="l00201"></a>00201 }
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="keywordflow">for</span> (; i < <a class="code" href="stk11xx_8h.html#aece77d67ce4d8f6c8e27269d33c9d89">STK11XX_MAX_IMAGES</a>; i++)
<a name="l00204"></a>00204 dev->images[i].offset = 0;
<a name="l00205"></a>00205
<a name="l00206"></a>00206 kbuf = NULL;
<a name="l00207"></a>00207
<a name="l00208"></a>00208 <span class="keywordflow">return</span> 0;
<a name="l00209"></a>00209 }
<a name="l00210"></a>00210
<a name="l00211"></a>00211
<a name="l00221"></a><a class="code" href="stk11xx_8h.html#c5658017a802daf91de04b84770cf8b0">00221</a> <span class="keywordtype">int</span> <a class="code" href="stk11xx-buf_8c.html#0440ed10dc62dfbe7cec72e328dec04f" title="Reset all ISOC buffers.">stk11xx_reset_buffers</a>(<span class="keyword">struct</span> usb_stk11xx *dev)
<a name="l00222"></a>00222 {
<a name="l00223"></a>00223 <span class="keywordtype">int</span> i;
<a name="l00224"></a>00224 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> flags;
<a name="l00225"></a>00225
<a name="l00226"></a>00226 <a class="code" href="stk11xx_8h.html#6a7ffe6803607fae5d467b1b4f5515f2">STK_DEBUG</a>(<span class="stringliteral">"Reset all buffers\n"</span>);
<a name="l00227"></a>00227
<a name="l00228"></a>00228 spin_lock_irqsave(&dev->spinlock, flags);
<a name="l00229"></a>00229
<a name="l00230"></a>00230 dev->full_frames = NULL;
<a name="l00231"></a>00231 dev->full_frames_tail = NULL;
<a name="l00232"></a>00232
<a name="l00233"></a>00233 <span class="keywordflow">for</span> (i=0; i<dev->nbuffers; i++) {
<a name="l00234"></a>00234 dev->framebuf[i].filled = 0;
<a name="l00235"></a>00235 dev->framebuf[i].errors = 0;
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <span class="keywordflow">if</span> (i > 0)
<a name="l00238"></a>00238 dev->framebuf[i].next = &dev->framebuf[i - 1];
<a name="l00239"></a>00239 <span class="keywordflow">else</span>
<a name="l00240"></a>00240 dev->framebuf->next = NULL;
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242
<a name="l00243"></a>00243 dev->empty_frames = &dev->framebuf[dev->nbuffers - 1];
<a name="l00244"></a>00244 dev->empty_frames_tail = dev->framebuf;
<a name="l00245"></a>00245 dev->read_frame = NULL;
<a name="l00246"></a>00246 dev->fill_frame = dev->empty_frames;
<a name="l00247"></a>00247 dev->empty_frames = dev->empty_frames->next;
<a name="l00248"></a>00248
<a name="l00249"></a>00249 dev->image_read_pos = 0;
<a name="l00250"></a>00250 dev->fill_image = 0;
<a name="l00251"></a>00251
<a name="l00252"></a>00252 spin_unlock_irqrestore(&dev->spinlock, flags);
<a name="l00253"></a>00253
<a name="l00254"></a>00254 <span class="keywordflow">for</span> (i=0; i<dev->nbuffers; i++)
<a name="l00255"></a>00255 dev->image_used[i] = 0;
<a name="l00256"></a>00256
<a name="l00257"></a>00257 <span class="keywordflow">return</span> 0;
<a name="l00258"></a>00258 }
<a name="l00259"></a>00259
<a name="l00260"></a>00260
<a name="l00270"></a><a class="code" href="stk11xx_8h.html#3633ec31448d548f5528cfd818435856">00270</a> <span class="keywordtype">int</span> <a class="code" href="stk11xx-buf_8c.html#cd7e46aba32bcbb5d429b21878d44845" title="Clear current buffers.">stk11xx_clear_buffers</a>(<span class="keyword">struct</span> usb_stk11xx *dev)
<a name="l00271"></a>00271 {
<a name="l00272"></a>00272 memset(dev->image_data, 0x00, dev->nbuffers * dev->len_per_image);
<a name="l00273"></a>00273
<a name="l00274"></a>00274 <span class="keywordflow">return</span> 0;
<a name="l00275"></a>00275 }
<a name="l00276"></a>00276
<a name="l00277"></a>00277
<a name="l00287"></a><a class="code" href="stk11xx_8h.html#743db10a2819add190d2d1ab9e32ad80">00287</a> <span class="keywordtype">int</span> <a class="code" href="stk11xx-buf_8c.html#3bc8bb033fc9697ba1e8b42be11a6efe" title="Release all buffers.">stk11xx_free_buffers</a>(<span class="keyword">struct</span> usb_stk11xx *dev)
<a name="l00288"></a>00288 {
<a name="l00289"></a>00289 <span class="keywordtype">int</span> i;
<a name="l00290"></a>00290
<a name="l00291"></a>00291 <a class="code" href="stk11xx_8h.html#6a7ffe6803607fae5d467b1b4f5515f2">STK_DEBUG</a>(<span class="stringliteral">"Free buffers\n"</span>);
<a name="l00292"></a>00292
<a name="l00293"></a>00293 <span class="keywordflow">if</span> (dev == NULL)
<a name="l00294"></a>00294 <span class="keywordflow">return</span> -1;
<a name="l00295"></a>00295
<a name="l00296"></a>00296 <span class="comment">// Release iso pipe buffers</span>
<a name="l00297"></a>00297 <span class="keywordflow">for</span> (i=0; i<<a class="code" href="stk11xx_8h.html#ac10237297a8b2b0665e56179c99b64f">MAX_ISO_BUFS</a>; i++) {
<a name="l00298"></a>00298 <span class="keywordflow">if</span> (dev->isobuf[i].data != NULL) {
<a name="l00299"></a>00299 kfree(dev->isobuf[i].data);
<a name="l00300"></a>00300 dev->isobuf[i].data = NULL;
<a name="l00301"></a>00301 }
<a name="l00302"></a>00302 }
<a name="l00303"></a>00303
<a name="l00304"></a>00304 <span class="comment">// Release frame buffers</span>
<a name="l00305"></a>00305 <span class="keywordflow">if</span> (dev->framebuf != NULL) {
<a name="l00306"></a>00306 <span class="keywordflow">for</span> (i=0; i<<a class="code" href="stk11xx-buf_8c.html#385b5670ebc09051672b831ac96d7e9d">default_nbrframebuf</a>; i++) {
<a name="l00307"></a>00307 <span class="keywordflow">if</span> (dev->framebuf[i].data != NULL) {
<a name="l00308"></a>00308 vfree(dev->framebuf[i].data);
<a name="l00309"></a>00309 dev->framebuf[i].data = NULL;
<a name="l00310"></a>00310 }
<a name="l00311"></a>00311 }
<a name="l00312"></a>00312
<a name="l00313"></a>00313 kfree(dev->framebuf);
<a name="l00314"></a>00314 dev->framebuf = NULL;
<a name="l00315"></a>00315 }
<a name="l00316"></a>00316
<a name="l00317"></a>00317 <span class="comment">// Release image buffers</span>
<a name="l00318"></a>00318 <span class="keywordflow">if</span> (dev->image_data != NULL)
<a name="l00319"></a>00319 <a class="code" href="stk11xx-buf_8c.html#8280ec87ea86b172bf3b44394a243158" title="Free a buffer.">stk11xx_rvfree</a>(dev->image_data, dev->nbuffers * dev->len_per_image);
<a name="l00320"></a>00320
<a name="l00321"></a>00321 dev->image_data = NULL;
<a name="l00322"></a>00322
<a name="l00323"></a>00323 <span class="keywordflow">return</span> 0;
<a name="l00324"></a>00324 }
<a name="l00325"></a>00325
<a name="l00326"></a>00326
<a name="l00334"></a><a class="code" href="stk11xx_8h.html#d488d2f913e0dbe93a9a8fdee45c9f74">00334</a> <span class="keywordtype">void</span> <a class="code" href="stk11xx-buf_8c.html#5805bf7c1173f7f6063c1c5934c73e1b" title="Prepare the next image.">stk11xx_next_image</a>(<span class="keyword">struct</span> usb_stk11xx *dev)
<a name="l00335"></a>00335 {
<a name="l00336"></a>00336 <a class="code" href="stk11xx_8h.html#649dee4d247234a95351c9d56205623b">STK_STREAM</a>(<span class="stringliteral">"Select next image\n"</span>);
<a name="l00337"></a>00337
<a name="l00338"></a>00338 dev->image_used[dev->fill_image] = 0;
<a name="l00339"></a>00339 dev->fill_image = (dev->fill_image + 1) % dev->nbuffers;
<a name="l00340"></a>00340 }
<a name="l00341"></a>00341
<a name="l00342"></a>00342
<a name="l00352"></a><a class="code" href="stk11xx_8h.html#32eb2f968fb5595a37696bfc87ef3b0b">00352</a> <span class="keywordtype">int</span> <a class="code" href="stk11xx-buf_8c.html#42ee71f1080bbad747679c4b1f5040f4" title="Prepare the next frame.">stk11xx_next_frame</a>(<span class="keyword">struct</span> usb_stk11xx *dev)
<a name="l00353"></a>00353 {
<a name="l00354"></a>00354 <span class="keywordtype">int</span> ret = 0;
<a name="l00355"></a>00355 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> flags;
<a name="l00356"></a>00356
<a name="l00357"></a>00357 <a class="code" href="stk11xx_8h.html#649dee4d247234a95351c9d56205623b">STK_STREAM</a>(<span class="stringliteral">"Select next frame\n"</span>);
<a name="l00358"></a>00358
<a name="l00359"></a>00359 spin_lock_irqsave(&dev->spinlock, flags);
<a name="l00360"></a>00360
<a name="l00361"></a>00361 <span class="keywordflow">if</span> (dev->fill_frame != NULL) {
<a name="l00362"></a>00362 <span class="keywordflow">if</span> (dev->full_frames == NULL) {
<a name="l00363"></a>00363 dev->full_frames = dev->fill_frame;
<a name="l00364"></a>00364 dev->full_frames_tail = dev->full_frames;
<a name="l00365"></a>00365 }
<a name="l00366"></a>00366 <span class="keywordflow">else</span> {
<a name="l00367"></a>00367 dev->full_frames_tail->next = dev->fill_frame;
<a name="l00368"></a>00368 dev->full_frames_tail = dev->fill_frame;
<a name="l00369"></a>00369 }
<a name="l00370"></a>00370 }
<a name="l00371"></a>00371
<a name="l00372"></a>00372 <span class="keywordflow">if</span> (dev->empty_frames != NULL) {
<a name="l00373"></a>00373 dev->fill_frame = dev->empty_frames;
<a name="l00374"></a>00374 dev->empty_frames = dev->empty_frames->next;
<a name="l00375"></a>00375 }
<a name="l00376"></a>00376 <span class="keywordflow">else</span> {
<a name="l00377"></a>00377 <span class="keywordflow">if</span> (dev->full_frames == NULL) {
<a name="l00378"></a>00378 <a class="code" href="stk11xx_8h.html#2548285f2eade14f8e93c9b611e622d7">STK_ERROR</a>(<span class="stringliteral">"Neither empty or full frames available!\n"</span>);
<a name="l00379"></a>00379 spin_unlock_irqrestore(&dev->spinlock, flags);
<a name="l00380"></a>00380 <span class="keywordflow">return</span> -EINVAL;
<a name="l00381"></a>00381 }
<a name="l00382"></a>00382
<a name="l00383"></a>00383 dev->fill_frame = dev->full_frames;
<a name="l00384"></a>00384 dev->full_frames = dev->full_frames->next;
<a name="l00385"></a>00385
<a name="l00386"></a>00386 ret = 1;
<a name="l00387"></a>00387 }
<a name="l00388"></a>00388
<a name="l00389"></a>00389 dev->fill_frame->next = NULL;
<a name="l00390"></a>00390
<a name="l00391"></a>00391 spin_unlock_irqrestore(&dev->spinlock, flags);
<a name="l00392"></a>00392
<a name="l00393"></a>00393 <span class="keywordflow">return</span> ret;
<a name="l00394"></a>00394 }
<a name="l00395"></a>00395
<a name="l00396"></a>00396
<a name="l00407"></a><a class="code" href="stk11xx_8h.html#6149eb9b00c67901fa80e745931a1ef8">00407</a> <span class="keywordtype">int</span> <a class="code" href="stk11xx-buf_8c.html#21bfe8791f1f53fcd64a185dc6fdc686" title="Handler frame.">stk11xx_handle_frame</a>(<span class="keyword">struct</span> usb_stk11xx *dev)
<a name="l00408"></a>00408 {
<a name="l00409"></a>00409 <span class="keywordtype">int</span> ret = 0;
<a name="l00410"></a>00410 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> flags;
<a name="l00411"></a>00411
<a name="l00412"></a>00412 <a class="code" href="stk11xx_8h.html#649dee4d247234a95351c9d56205623b">STK_STREAM</a>(<span class="stringliteral">"Sync Handle Frame\n"</span>);
<a name="l00413"></a>00413
<a name="l00414"></a>00414 spin_lock_irqsave(&dev->spinlock, flags);
<a name="l00415"></a>00415
<a name="l00416"></a>00416 <span class="keywordflow">if</span> (dev->read_frame != NULL) {
<a name="l00417"></a>00417 spin_unlock_irqrestore(&dev->spinlock, flags);
<a name="l00418"></a>00418 <span class="keywordflow">return</span> ret;
<a name="l00419"></a>00419 }
<a name="l00420"></a>00420
<a name="l00421"></a>00421 <span class="keywordflow">if</span> (dev->full_frames == NULL) {
<a name="l00422"></a>00422 }
<a name="l00423"></a>00423 <span class="keywordflow">else</span> {
<a name="l00424"></a>00424 dev->read_frame = dev->full_frames;
<a name="l00425"></a>00425 dev->full_frames = dev->full_frames->next;
<a name="l00426"></a>00426 dev->read_frame->next = NULL;
<a name="l00427"></a>00427 }
<a name="l00428"></a>00428
<a name="l00429"></a>00429 <span class="keywordflow">if</span> (dev->read_frame != NULL) {
<a name="l00430"></a>00430 spin_unlock_irqrestore(&dev->spinlock, flags);
<a name="l00431"></a>00431 ret = <a class="code" href="stk11xx-bayer_8c.html#9ee33d88b9cef4d591b6f426599ac1de" title="Decompress a frame.">stk11xx_decompress</a>(dev);
<a name="l00432"></a>00432 spin_lock_irqsave(&dev->spinlock, flags);
<a name="l00433"></a>00433
<a name="l00434"></a>00434 <span class="keywordflow">if</span> (dev->empty_frames == NULL) {
<a name="l00435"></a>00435 dev->empty_frames = dev->read_frame;
<a name="l00436"></a>00436 dev->empty_frames_tail = dev->empty_frames;
<a name="l00437"></a>00437 }
<a name="l00438"></a>00438 <span class="keywordflow">else</span> {
<a name="l00439"></a>00439 dev->empty_frames_tail->next = dev->read_frame;
<a name="l00440"></a>00440 dev->empty_frames_tail = dev->read_frame;
<a name="l00441"></a>00441 }
<a name="l00442"></a>00442
<a name="l00443"></a>00443 dev->read_frame = NULL;
<a name="l00444"></a>00444 }
<a name="l00445"></a>00445
<a name="l00446"></a>00446 spin_unlock_irqrestore(&dev->spinlock, flags);
<a name="l00447"></a>00447
<a name="l00448"></a>00448 <a class="code" href="stk11xx-dev_8c.html#b6a8938b1423e69a210dc8a6ce6747cb" title="A espece of software watchdog.">dev_stk11xx_watchdog_camera</a>(dev);
<a name="l00449"></a>00449
<a name="l00450"></a>00450 <span class="keywordflow">return</span> ret;
<a name="l00451"></a>00451 }
<a name="l00452"></a>00452
</pre></div></div>
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