RE: [alsa-devel] WL1273 FM Radio driver...
> On Tue, 2011-02-08 at 13:02 +0200, Peter Ujfalusi wrote: > > > For both configuration we have a set of HCI commands to configure the FM > audio > > > path and one of my concerns is to know if the wl1273_codec should handle > the audio path configuration > > > and the switch between FM and BT SCO? > > > > It would be better if the codec could handle the configuration, > > depending on which DAI is in use. If we can send HCI commands from > > kernel, I think that would be the cleanest way. > > Yes, I would have done just that - and we talked a lot about it locally > - if I had known how to do it. I started to work on it and also talked > to some BT people but it didn't seem feasible at the time. Advice > welcome of course... > > Cheers, > Matti > Hi, Below the set of HCI commands that we have identified to configure the FM and BT SCO audio paths: - External Audio Connection o START BT SCO Connection # BT audio Path PCM & FM audio Path I2S > hcitool cmd 0x3F 0X195 FF FF FF FF FF FF FF FF 01 02 FF 00 00 00 00 # BT AUDIO Codec Configuration: MASTER > hcitool cmd 0x3F 0X106 00 03 00 40 1F 00 00 01 00 00 00 00 10 00 02 00 00 10 00 02 00 01 00 00 00 00 00 00 00 00 00 00 o STOP BT SCO Connection # BT AUDIO Codec Configuration: SLAVE > hcitool cmd 0x3F 0X106 00 03 01 40 1F 00 00 01 00 00 00 00 10 00 02 00 00 10 00 02 00 01 00 00 00 00 00 00 00 00 00 00 - Internal Audio Connection o START BT SCO Connection # BT audio Path PCM # FM audio Path None > hcitool cmd 0x3F 0X195 FF FF FF FF FF FF FF FF 01 00 FF 00 00 00 00 # BT AUDIO Codec Configuration: MASTER > hcitool cmd 0x3F 0X106 00 03 00 40 1F 00 00 01 00 00 00 00 10 00 02 00 00 10 00 02 00 01 00 00 00 00 00 00 00 00 00 00 o STOP BT SCO Connection # BT audio Path None & FM audio Path None > hcitool cmd 0x3F 0X195 FF FF FF FF FF FF FF FF 00 00 FF 00 00 00 00 o FM Audio Path configuration # BT audio Path None & FM audio Path PCM > hcitool cmd 0x3F 0X195 FF FF FF FF FF FF FF FF 00 01 FF 00 00 00 00 Please note that the BT SCO Codec settings are platform specific. Selma. - Intel Corporation SAS (French simplified joint stock company) Registered headquarters: "Les Montalets"- 2, rue de Paris, 92196 Meudon Cedex, France Registration Number: 302 456 199 R.C.S. NANTERRE Capital: 4,572,000 Euros This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.
RE: [alsa-devel] WL1273 FM Radio driver...
> > For both configuration we have a set of HCI commands to configure the FM > audio > > path and one of my concerns is to know if the wl1273_codec should handle the > audio path configuration > > and the switch between FM and BT SCO? > > It would be better if the codec could handle the configuration, > depending on which DAI is in use. If we can send HCI commands from > kernel, I think that would be the cleanest way. If we use the Combined Interface Mode (host controls both the BT and FM radio via BT HCI) this could be possible. However, you use the Separate Interface (FM controlled vi I2C). Is there a plan to handle also the Combined Interface Mode for WL1273 FM Radio driver? Selma. > -- > Péter - Intel Corporation SAS (French simplified joint stock company) Registered headquarters: "Les Montalets"- 2, rue de Paris, 92196 Meudon Cedex, France Registration Number: 302 456 199 R.C.S. NANTERRE Capital: 4,572,000 Euros This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
RE: [alsa-devel] WL1273 FM Radio driver...
> The wl1273 as such is designed for embedded systems. > It can be connected in several ways to the system: > - analog only > In this way the RX/TX is connected to some codec's Line IN/OUT > For this to work, we don't need any audio driver for the FM chip > (basically the same configuration as rx51 has in regards of FM radio) > > - Digital interfaces > The I2S lines are connected to the main processor. In this way the > wl1273 acts as a codec. > In order to provide platform independent driver we need to use ASoC > framework. ASoC have broad main processor side support, and it is easy > to switch the arch, if we have proper ASoC codec driver for the wl1273. > It is also better to keep the codec implementation under > sound/soc/codecs. > 2 Digital interfaces are possible for FM WL1273: - the external connection: the I2S lines are used for the FM PCM samples - the internal connection: the BT PCM interface is used for the FM PCM samples For both configuration we have a set of HCI commands to configure the FM audio path and one of my concerns is to know if the wl1273_codec should handle the audio path configuration and the switch between FM and BT SCO? > I have not looked deeply into the wl1273 datasheets, but I'm sure > there's a way to nicely divide the parts between the MFD, V4L, and ASoC. > > -- > Péter > ___ > Alsa-devel mailing list > alsa-de...@alsa-project.org > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel - Intel Corporation SAS (French simplified joint stock company) Registered headquarters: "Les Montalets"- 2, rue de Paris, 92196 Meudon Cedex, France Registration Number: 302 456 199 R.C.S. NANTERRE Capital: 4,572,000 Euros This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
