At Mon, 22 May 2006 14:18:51 +0100, Alan Horstmann wrote: > > On Friday 19 May 2006 18:15, you wrote: > > At Fri, 19 May 2006 17:10:01 +0100, > > > > Alan Horstmann wrote: > > > On Friday 19 May 2006 13:44, you wrote: > > > > At Fri, 19 May 2006 11:51:24 +0100, > > > > > > > > Alan Horstmann wrote: > > > > > When a mpu401 midi device is created, it seems to appear as available > > > > > for both input and output. > > > > > > > > > > However, several ice1712 cards use the 2nd mpu401 port for midi out > > > > > only and do not make any connection available for input. > > > > > > > > > > How can the 2nd device be created for output only so the device does > > > > > not appear as available for input? > > > > > > > > I have the following pending patch on my local tree. > > > > It changes the 5th parameter in snd_mpu401_uart_new() to bit flags, > > > > and allows you to choose duplex, separate tx, and mmio mode. > > > > > > > > If it looks OK to you, I'll commit it. > > > > > > Wow! It is not very often something has been tackled before you mention > > > the need! I hope to try this out quickley over the next few days and > > > report back. > > > > Argh, I found a silly typo in my previous patch. > > The fixed one is below. > > Took a bit of effort to get patch to apply to 1.0.11 here, but eventually > suceeded to get it to compile and run, with MPU401_INFO_INTEGRATED in all > occurances. > Then changed ice1712.c 2nd port to MPU401_INFO_OUTPUT. Loading the driver > failled: > > linux kernel: ALSA ../../alsa-kernel/drivers/mpu401/mpu401_uart.c:548: > mpu401_uart: unable to grab port 0xc81c size 2 > > Perhaps if ! ( _INTEGRATED) at this section should include _OUTPUT and _INPUT > flags? snd_mpu401_uart_new() assumes the full-duplex if neither OUTPUT nor INPUT flag is set. It's just for convenience. The port allocation should have nothing to do with full or half duplex. If the port is given and no INTEGRATED flag is set, the function tries to allocate the port. The error message above means that the port is already allocated. You should set it "MPU401_INFO_OUTPUT | MPU401_INFO_INTEGRATED". > Anyway I //out these 8 lines and the driver would load. However, > > > cat /proc/asound/seq/clients > Client info > cur clients : 3 > peak clients : 4 > max clients : 192 > > Client 0 : "System" [Kernel] > Port 0 : "Timer" (Rwe-) > Port 1 : "Announce" (R-e-) > Client 16 : "TerraTec DMX6Fire" [Kernel] > Port 0 : "MIDI-Front DMX6fire 0" (RWeX) > Port 32 : "Wavetable DMX6fire 0" (--e-) > Client 20 : "Aureal Vortex au8820" [Kernel] > Port 0 : "au8820 MIDI 1" (RWeX) > > shows(?) that the wavetable device is not writable. aplaymidi cannot open the > port, and doesn't list it. > > Suggestions as to what causes this? Have checked out_enable=1, input_enable=0 > for the 2nd port. > Is this patch going to be appropriate where a duplex port (ie the envy24 chip) > is used for output only? Yes. Basically I wrote the patch for a new driver for Envy24-II chip, but it's good for others, too. Takashi ------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
