topic Re: __raw_writel for SAIF in i.MX Processors https://community.nxp.com/t5/i-MX-Processors/raw-writel-for-SAIF/m-p/182414#M7975 <HTML><HEAD></HEAD><BODY><P>Thanks for the reply.&nbsp;</P><P>Yes, it is true. If you write data to SAIF0_DATA it will be written to FIFO and when you read from SAIF0 it returns 0x0.&nbsp;<BR /> I tried to not activate (write(0, SAIF0_DATA)) the transmission in the trigger function and the transmission doesn't do anything so that proves the fact that the writings do happen.&nbsp;</P><P><CITE>zhengfudi said:</CITE></P><BLOCKQUOTE cite="http://imxcommunity.org/forum/topics/raw-writel-for-saif?groupUrl=imx28andimx28evk&amp;commentId=4103961%3AComment%3A78985&amp;xg_source=msg_com_gr_forum#4103961Comment78985"><DIV><DIV class="xg_user_generated"><P>Note the SAIF's FIFO. Data written to SAIF0_DATA will be transmitted to FIFO immediately.</P></DIV></DIV></BLOCKQUOTE></BODY></HTML> Fri, 17 Aug 2012 06:01:54 GMT StefanGeorge 2012-08-17T06:01:54Z __raw_writel for SAIF https://community.nxp.com/t5/i-MX-Processors/raw-writel-for-SAIF/m-p/182412#M7973 <HTML><HEAD></HEAD><BODY><P>I am using a custom board based on imx28 with the SAIF interface connected directly with the PCM output of a modem. I have written a dummy codec (with a line discipline that controls the modem), integrate it with mxs-devb.c. I am able to receive DMA irq but when __readl(SAIF0_DATA) i always receive 0x0. Even if i manualy write (__raw_writel(0x2131231, SAIF0_DATA_SET)) and then read the data i still get 0.&nbsp;</P><P>Do you have any ideeas?</P></BODY></HTML> Thu, 16 Aug 2012 14:02:33 GMT https://community.nxp.com/t5/i-MX-Processors/raw-writel-for-SAIF/m-p/182412#M7973 StefanGeorge 2012-08-16T14:02:33Z Re: __raw_writel for SAIF https://community.nxp.com/t5/i-MX-Processors/raw-writel-for-SAIF/m-p/182413#M7974 <HTML><HEAD></HEAD><BODY><P>Note the SAIF's FIFO. Data written to SAIF0_DATA will be transmitted to FIFO immediately.</P></BODY></HTML> Fri, 17 Aug 2012 00:55:05 GMT https://community.nxp.com/t5/i-MX-Processors/raw-writel-for-SAIF/m-p/182413#M7974 F_D_ 2012-08-17T00:55:05Z Re: __raw_writel for SAIF https://community.nxp.com/t5/i-MX-Processors/raw-writel-for-SAIF/m-p/182414#M7975 <HTML><HEAD></HEAD><BODY><P>Thanks for the reply.&nbsp;</P><P>Yes, it is true. If you write data to SAIF0_DATA it will be written to FIFO and when you read from SAIF0 it returns 0x0.&nbsp;<BR /> I tried to not activate (write(0, SAIF0_DATA)) the transmission in the trigger function and the transmission doesn't do anything so that proves the fact that the writings do happen.&nbsp;</P><P><CITE>zhengfudi said:</CITE></P><BLOCKQUOTE cite="http://imxcommunity.org/forum/topics/raw-writel-for-saif?groupUrl=imx28andimx28evk&amp;commentId=4103961%3AComment%3A78985&amp;xg_source=msg_com_gr_forum#4103961Comment78985"><DIV><DIV class="xg_user_generated"><P>Note the SAIF's FIFO. Data written to SAIF0_DATA will be transmitted to FIFO immediately.</P></DIV></DIV></BLOCKQUOTE></BODY></HTML> Fri, 17 Aug 2012 06:01:54 GMT https://community.nxp.com/t5/i-MX-Processors/raw-writel-for-SAIF/m-p/182414#M7975 StefanGeorge 2012-08-17T06:01:54Z