stv0297.html.html

汤姆逊高频头自带QAM调制器0297在linux下的驱动

<a name="L167" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L167">167</a> 
<a name="L168" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L168">168</a>         <b><i>// this device needs a STOP between the register and data</i></b>
<a name="L169" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L169">169</a> <b><i></i></b>        if ((ret = <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=i2c_transfer">i2c_transfer</a> (<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>-&gt;<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=i2c">i2c</a>, &amp;<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=msg">msg</a>[0], 1)) != 1) {
<a name="L170" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L170">170</a>                 <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=dprintk">dprintk</a>(<i>"%s: readreg error (reg == 0x%02x, ret == %i)\n"</i>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=__FUNCTION__">__FUNCTION__</a>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=reg">reg</a>, ret);
<a name="L171" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L171">171</a>                 return -1;
<a name="L172" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L172">172</a>         }
<a name="L173" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L173">173</a>         if ((ret = <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=i2c_transfer">i2c_transfer</a> (<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>-&gt;<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=i2c">i2c</a>, &amp;<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=msg">msg</a>[1], 1)) != 1) {
<a name="L174" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L174">174</a>                 <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=dprintk">dprintk</a>(<i>"%s: readreg error (reg == 0x%02x, ret == %i)\n"</i>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=__FUNCTION__">__FUNCTION__</a>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=reg">reg</a>, ret);
<a name="L175" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L175">175</a>                 return -1;
<a name="L176" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L176">176</a>         }
<a name="L177" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L177">177</a> 
<a name="L178" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L178">178</a>         return <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=b1">b1</a>[0];
<a name="L179" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L179">179</a> }
<a name="L180" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L180">180</a> 
<a name="L181" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L181">181</a> static int <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_writereg_mask">stv0297_writereg_mask</a> (struct <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_state">stv0297_state</a>* <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=u8">u8</a> <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=reg">reg</a>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=u8">u8</a> <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=mask">mask</a>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=u8">u8</a> <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=data">data</a>)
<a name="L182" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L182">182</a> {
<a name="L183" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L183">183</a>         int <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=val">val</a>;
<a name="L184" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L184">184</a> 
<a name="L185" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L185">185</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=val">val</a> = <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_readreg">stv0297_readreg</a>(<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=reg">reg</a>);
<a name="L186" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L186">186</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=val">val</a> &amp;= ~mask;
<a name="L187" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L187">187</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=val">val</a> |= (<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=data">data</a> &amp; <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=mask">mask</a>);
<a name="L188" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L188">188</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_writereg">stv0297_writereg</a>(<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=reg">reg</a>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=val">val</a>);
<a name="L189" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L189">189</a> 
<a name="L190" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L190">190</a>         return 0;
<a name="L191" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L191">191</a> }
<a name="L192" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L192">192</a> 
<a name="L193" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L193">193</a> static int <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_readregs">stv0297_readregs</a> (struct <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_state">stv0297_state</a>* <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=u8">u8</a> reg1, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=u8">u8</a> *<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=b">b</a>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=u8">u8</a> <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=len">len</a>)
<a name="L194" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L194">194</a> {
<a name="L195" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L195">195</a>         int ret;
<a name="L196" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L196">196</a>         struct <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=i2c_msg">i2c_msg</a> <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=msg">msg</a> [] = { { .<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=addr">addr</a> = <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>-&gt;<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=config">config</a>-&gt;demod_address, .<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=flags">flags</a> = 0, .<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=buf">buf</a> = &amp;reg1, .<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=len">len</a> = 1 },
<a name="L197" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L197">197</a>                                   { .<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=addr">addr</a> = <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>-&gt;<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=config">config</a>-&gt;demod_address, .<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=flags">flags</a> = <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=I2C_M_RD">I2C_M_RD</a>, .<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=buf">buf</a> = <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=b">b</a>, .<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=len">len</a> = <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=len">len</a> } };
<a name="L198" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L198">198</a> 
<a name="L199" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L199">199</a>         <b><i>// this device needs a STOP between the register and data</i></b>
<a name="L200" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L200">200</a> <b><i></i></b>        if ((ret = <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=i2c_transfer">i2c_transfer</a> (<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>-&gt;<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=i2c">i2c</a>, &amp;<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=msg">msg</a>[0], 1)) != 1) {
<a name="L201" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L201">201</a>                 <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=dprintk">dprintk</a>(<i>"%s: readreg error (reg == 0x%02x, ret == %i)\n"</i>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=__FUNCTION__">__FUNCTION__</a>, reg1, ret);
<a name="L202" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L202">202</a>                 return -1;
<a name="L203" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L203">203</a>         }
<a name="L204" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L204">204</a>         if ((ret = <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=i2c_transfer">i2c_transfer</a> (<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>-&gt;<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=i2c">i2c</a>, &amp;<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=msg">msg</a>[1], 1)) != 1) {
<a name="L205" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L205">205</a>                 <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=dprintk">dprintk</a>(<i>"%s: readreg error (reg == 0x%02x, ret == %i)\n"</i>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=__FUNCTION__">__FUNCTION__</a>, reg1, ret);
<a name="L206" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L206">206</a>                 return -1;
<a name="L207" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L207">207</a>         }
<a name="L208" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L208">208</a> 
<a name="L209" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L209">209</a>         return 0;
<a name="L210" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L210">210</a> }
<a name="L211" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L211">211</a> 
<a name="L212" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L212">212</a> static void <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_set_symbolrate">stv0297_set_symbolrate</a>(struct <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_state">stv0297_state</a> *<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>, <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=u32">u32</a> srate)
<a name="L213" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L213">213</a> {
<a name="L214" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L214">214</a>         long <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a>;
<a name="L215" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L215">215</a> 
<a name="L216" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L216">216</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a> = 131072L * srate;  <b><i>/* 131072 = 2^17  */</i></b>
<a name="L217" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L217">217</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a> = <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a> / (<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=STV0297_CLOCK_KHZ">STV0297_CLOCK_KHZ</a> / 4);    <b><i>/* 1/4 = 2^-2 */</i></b>
<a name="L218" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L218">218</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a> = <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a> * 8192L;      <b><i>/* 8192 = 2^13 */</i></b>
<a name="L219" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L219">219</a> 
<a name="L220" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L220">220</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_writereg">stv0297_writereg</a> (<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>, 0x55,(unsigned char)(<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a> &amp; 0xFF));
<a name="L221" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L221">221</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_writereg">stv0297_writereg</a> (<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>, 0x56,(unsigned char)(<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a>&gt;&gt; 8));
<a name="L222" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L222">222</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_writereg">stv0297_writereg</a> (<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>, 0x57,(unsigned char)(<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a>&gt;&gt;16));
<a name="L223" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L223">223</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_writereg">stv0297_writereg</a> (<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>, 0x58,(unsigned char)(<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a>&gt;&gt;24));
<a name="L224" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L224">224</a> }
<a name="L225" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L225">225</a> 
<a name="L226" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L226">226</a> static void <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_set_sweeprate">stv0297_set_sweeprate</a>(struct <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=stv0297_state">stv0297_state</a> *<a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=state">state</a>, short fshift, long symrate)
<a name="L227" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L227">227</a> {
<a name="L228" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L228">228</a>         long <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a>;
<a name="L229" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L229">229</a> 
<a name="L230" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L230">230</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a> = (long) fshift *262144L;   <b><i>/* 262144 = 2*18 */</i></b>
<a name="L231" href="http://glide.stanford.edu/lxr/source/drivers/media/dvb/frontends/stv0297.c?v=linux-2.6.10#L231">231</a>         <a href="http://glide.stanford.edu/lxr/ident?v=linux-2.6.10;i=tmp">tmp</a> /= symrate;