sure. the bcm4325 has uart transport for BT [so I can make use of hci_h4, say by hciattach - like bcm2035]. The FM core understands hci-vendor specific command. for example, I send HCI_VS opcode=0x20 to set the power of Rx to On.[The power on sequence also involves download of a firmware which is nothing but a file with ~10/20 hci-vendor specific commands with different opcodes]. opcode 0x0a (say) to set the frequency and similarly in opcode 0x1d [audio enable] I give an data arguement 0x01 or 0x02 to say to FM Rx to put out audio on either it's analog lines or digital [i2s] lines.. Currently my fm stack, application is making use of hci_open_dev, send_cmd kind of hci lib calls to send commands. Now what should be my approach to send in same sort of commands from the kernel space ? regards, Pavan ----- Original Message ---- From: Marcel Holtmann <marcel@xxxxxxxxxxxx> To: Pavan Savoy <pavan_savoy@xxxxxxxxxxx> Cc: linux-bluetooth@xxxxxxxxxxxxxxx Sent: Wednesday, 26 August, 2009 11:33:04 PM Subject: Re: shared hci transport Hi Pavan, > A lot of recent BT chips intefaced by UART also tend to have another radio [mostly FM] on the same chip sharing the transport interface i.e the UART. [bcm4325 for example has bt, fm and wlan]. > > I just wanted to know, from the user-space the hci0 socket interface allows me to concurrently use the uart from several applications, but > is there a way in kernel to do the same ? > > [say hci_h4 is also used by the fm core to understand some vendor specific commands ?] > or in an usb case - the fm has int endpoint for control data of fm [+ hci-event/cmd packets] and bulk for rds[+ acl] [assuming the audio data path - is isolated from all these ...] this all depends on the actual transports. I would need the specifications to tell you more on the right way to deal with it. Regards Marcel -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Thinking of ordering food? Find restaurant numbers on Yahoo! India Local http://in.local.yahoo.com/ -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
