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[ALSA] mpu401 - Add MPU401_INFO_UART_ONLY bitflag

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Added MPU401_INFO_UART_ONLY bitflag to avoid issueing UART_ENTER command
at opening streams.  Some devices support only UART mode and give errors
to UART_ENTER.
A new module option, uart_enter, is added to snd-mpu401 driver.
For UART-only devices, set uart_enter=0.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Takashi Iwai
2007-02-22 16:07:21 +01:00
committed by Jaroslav Kysela
parent 76e6306774
commit 8f7ba051d2
4 changed files with 22 additions and 10 deletions
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1
Documentation/sound/alsa/ALSA-Configuration.txt
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@@ -1278,6 +1278,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
port - port number or -1 (disable)
irq - IRQ number or -1 (disable)
pnp - PnP detection - 0 = disable, 1 = enable (default)
uart_enter - Issue UART_ENTER command at open - bool, default = on
This module supports multiple devices and PnP.