Linux on a Motorola MPC5200 ?
We're working on some (simple) I2S stuff. What means simple in this context? No ADC, ... What codec you're planning to use? Has this project released any stuff yet? As far as I've been searching in latest linuxppc_2_4_devel, I've not been able to find anything regarding i2s issue. br, Marko ;== ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Linux on a Motorola MPC5200 ?
In message 17D9D7DF3CD5A94A9B4E82778D24391910A121 at MITRON you wrote: What means simple in this context? No ADC, ... What codec you're planning to use? simple means just being able to record an audio stream and store it in a file while simultaneously playing another file from disk. Has this project released any stuff yet? As far as I've been searching in latest linuxppc_2_4_devel, I've not been able to find anything regarding i2s issue. It makes little sense to put what we have on the server; not with the current BestComm code. Best regards, Wolfgang Denk -- See us @ Embedded World, Nuremberg, Feb 17 - 19, Hall 12.0 Booth 440 Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de Q: How many IBM CPU's does it take to execute a job? A: Four; three to hold it down, and one to rip its head off. ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Linux on a Motorola MPC5200 ?
In message 17D9D7DF3CD5A94A9B4E82778D24391910A119 at MITRON you wrote: I'm very interested in usable DMA engine for AC97. Will new BC uCode provide any help for this? I don;t know yet. I'm still waiting for the new release from Moto. Is there any attempt to develop an audio device driver for AC97 in MPC5200? We're working on some (simple) I2S stuff. Best regards, Wolfgang Denk -- See us @ Embedded World, Nuremberg, Feb 17 - 19, Hall 12.0 Booth 440 Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de Some people march to the beat of a different drummer. And some people tango! ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Linux on a Motorola MPC5200 ?
Wolfgang Denk wrote: In message 17D9D7DF3CD5A94A9B4E82778D24391910A119 at MITRON you wrote: I'm very interested in usable DMA engine for AC97. Will new BC uCode provide any help for this? I don;t know yet. I'm still waiting for the new release from Moto. Is there any attempt to develop an audio device driver for AC97 in MPC5200? We're working on some (simple) I2S stuff. I'm also gonna need to drive a AD1985 AC97 codec with the MPC5200, and if none exists, we'll be forced to do it ourself. I think many people are waiting for motorola uCode upgrade. Sylvain Munaut ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Linux on a Motorola MPC5200 ?
Hello I'm very interested in usable DMA engine for AC97. Will new BC uCode provide any help for this? Do you know what new CAPI will contain or is there any documentation available? Is there any attempt to develop an audio device driver for AC97 in MPC5200? As far as I've understood there are several problems regarding AC97 audio in MPC5200: - Variable sample rate mode is impossible (applications level data conversion required)? - PSC FIFO's are not frame aware (underrun will totally mess things) - it's hard to syncronize mixer commands with ongoing audio stream - FIFO can contain data only for ~180uS (BC interrupt latency and data handling time shall be less than this) - PCM data payload is less than 10% (huge kernel space buffers required) - XL-bus overhead (new BC API will definetly not decrease this, but seems pretty much like waste to me) - ... TIA, Marko -Original Message- From: Wolfgang Denk [SMTP:wd at denx.de] Sent: 27. tammikuuta 2004 21:15 To: Sylvain Munaut Cc: linuxppc-embedded at lists.linuxppc.org Subject: Re: Linux on a Motorola MPC5200 ? In message 40169FC6.1040805 at 246tNt.com you wrote: I'd like to run linux on a future custom board based on a motorola MPC5200 and I have a few questions : - What is the current support for it ? Stable ... I'd need the DMA ( Yes, it is stable, with a couple of well-known problems. well, their 'special DMA fancy stuff' ;) ), ATA, DDR, I2S, AC97 mainly. ATA: OK as long as you don't enable DMA writes (*) DDR: OK (use icecube_5200_DDR configuration in U-Boot); the LOWBOOT option is not working yet (we are working on this) I2S: simultaneous reading and writing is impossible (*) AC97: ditto (*) to fix these issues we're waiting for a bugfix release of the BestComm CAPI which might become availabe by mid February. - I'd really like to run a 2.6 kernel on it. If it's not yet ported to Forget it. Why would you want to do that? Which features do you expect from 2.6 which are not available in 2.4? the 2.6 what is the current ppc support for 2.6 ? Would I only need to port MPC specifics ? No comment. - Where can I find the current stuff ? I've taken what is in ppc.bkbits.net/linux-2.4-mpc5xxx, is there other things I should consider ? Our current stuff is on our CVS server, in the linuxppc_2_4_devel tree. As far as the 5200 is concerned this includes stuff that was submitted but not yet added to the linux-2.4-mpc5xxx tree (but Tom promised to add our patches). Best regards, Wolfgang Denk -- See us @ Embedded World, Nuremberg, Feb 17 - 19, Hall 12.0 Booth 440 Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de Machines take me by surprise with great frequency. - Alan Turing ;== ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Linux on a Motorola MPC5200 ?
Hi well, their 'special DMA fancy stuff' ;) ), ATA, DDR, I2S, AC97 mainly. ATA: OK as long as you don't enable DMA writes (*) Are DMA Read supported ? ( I mean possible to just use DMA for the reads ? My application is about 95 % reads ;) What's the performance impact ? DDR: OK (use icecube_5200_DDR configuration in U-Boot); the LOWBOOT option is not working yet (we are working on this) I2S: simultaneous reading and writing is impossible (*) AC97: ditto Ok, not a problem for me I only do audio out. But just in case, if I do In and Out on different PSC, does this works ? (*) to fix these issues we're waiting for a bugfix release of the BestComm CAPI which might become availabe by mid February. Cool ! - I'd really like to run a 2.6 kernel on it. If it's not yet ported to Forget it. Why would you want to do that? Which features do you expect from 2.6 which are not available in 2.4? Well things like *: - Pluggable I/O Scheduler - Kernel preemption - Better IPSec / Encryption support - udev stuff ( in fact userspace but may depend on some kernel interface, have to check. Primarly done for the 2.6 AFAIK ) - Native ALSA And also because when I start a new project I like to use new stuff ;) That's were a majority of new nifty features are ... (*) I'm not sure they are all only and 2.6 and not backported/already in 2.4, I have to check. Our current stuff is on our CVS server, in the linuxppc_2_4_devel tree. As far as the 5200 is concerned this includes stuff that was submitted but not yet added to the linux-2.4-mpc5xxx tree (but Tom promised to add our patches). I've just downloaded it but ran into a problem when compiling the kernel with the icecube default config. In arch/ppc/boot/common/misc-simple.c : - the decompress_kernel routine is used before being defined/declared - the decompress_kernel defined there takes 3 args, the one used in load_kernel func ( same file ), gives 4 args to it ... Sylvain Munaut ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Linux on a Motorola MPC5200 ?
Hello I'd like to run linux on a future custom board based on a motorola MPC5200 and I have a few questions : - What is the current support for it ? Stable ... I'd need the DMA ( well, their 'special DMA fancy stuff' ;) ), ATA, DDR, I2S, AC97 mainly. - I'd really like to run a 2.6 kernel on it. If it's not yet ported to the 2.6 what is the current ppc support for 2.6 ? Would I only need to port MPC specifics ? - Where can I find the current stuff ? I've taken what is in ppc.bkbits.net/linux-2.4-mpc5xxx, is there other things I should consider ? Thanks for any informations Munaut Sylvain ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
Linux on a Motorola MPC5200 ?
On Tue, Jan 27, 2004 at 05:28:38PM +, Sylvain Munaut wrote: Hello I'd like to run linux on a future custom board based on a motorola MPC5200 and I have a few questions : - What is the current support for it ? Stable ... I'd need the DMA ( well, their 'special DMA fancy stuff' ;) ), ATA, DDR, I2S, AC97 mainly. - I'd really like to run a 2.6 kernel on it. If it's not yet ported to the 2.6 what is the current ppc support for 2.6 ? Would I only need to port MPC specifics ? - Where can I find the current stuff ? I've taken what is in ppc.bkbits.net/linux-2.4-mpc5xxx, is there other things I should consider ? Thanks for any informations Munaut Sylvain I think you've found pretty much what's available. I haven't seen a 2.6 port for the 5200 yet. -Dale Farnsworth ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
