xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ALSA: emu10k1: Emu10k2 32 bit DMA mode

Browse Source 
Looks like audigy emu10k2 (probably emu10k1 - sb live too) support two
modes for DMA. Second mode is useful for 64 bit os with more then 2 GB
of ram (fixes problems with big soundfont loading)

1) 32MB from 2 GB address space using 8192 pages (used now as default)
2) 16MB from 4 GB address space using 4096 pages

Mode is set using HCFG_EXPANDED_MEM flag in HCFG register.
Also format of emu10k2 page table is then different.

Signed-off-by: Peter Zubaj <pzubaj@marticonet.sk>
Tested-by: Takashi Iwai <tiwai@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Peter Zubaj
2015-04-28 21:57:29 +02:00
committed by Takashi Iwai
parent 1c94e65c66
commit 7241ea558c
5 changed files with 30 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
include/sound/emu10k1.h
View File

@@ -41,7 +41,8 @@
#define EMUPAGESIZE 4096
#define MAXREQVOICES 8
#define MAXPAGES 8192
#define MAXPAGES0 4096 /* 32 bit mode */
#define MAXPAGES1 8192 /* 31 bit mode */
#define RESERVED 0
#define NUM_MIDI 16
#define NUM_G 64 /* use all channels */
@@ -50,8 +51,7 @@
/* FIXME? - according to the OSS driver the EMU10K1 needs a 29 bit DMA mask */
#define EMU10K1_DMA_MASK 0x7fffffffUL /* 31bit */
#define AUDIGY_DMA_MASK 0x7fffffffUL /* 31bit FIXME - 32 should work? */
/* See ALSA bug #1276 - rlrevell */
#define AUDIGY_DMA_MASK 0xffffffffUL /* 32bit mode */
#define TMEMSIZE 256*1024
#define TMEMSIZEREG 4
@@ -466,8 +466,11 @@
#define MAPB 0x0d /* Cache map B */
#define MAP_PTE_MASK 0xffffe000 /* The 19 MSBs of the PTE indexed by the PTI */
#define MAP_PTI_MASK 0x00001fff /* The 13 bit index to one of the 8192 PTE dwords */
#define MAP_PTE_MASK0 0xfffff000 /* The 20 MSBs of the PTE indexed by the PTI */
#define MAP_PTI_MASK0 0x00000fff /* The 12 bit index to one of the 4096 PTE dwords */
#define MAP_PTE_MASK1 0xffffe000 /* The 19 MSBs of the PTE indexed by the PTI */
#define MAP_PTI_MASK1 0x00001fff /* The 13 bit index to one of the 8192 PTE dwords */
/* 0x0e, 0x0f: Not used */
@@ -1704,6 +1707,7 @@ struct snd_emu10k1 {
unsigned short model; /* subsystem id */
unsigned int card_type; /* EMU10K1_CARD_* */
unsigned int ecard_ctrl; /* ecard control bits */
unsigned int address_mode; /* address mode */
unsigned long dma_mask; /* PCI DMA mask */
unsigned int delay_pcm_irq; /* in samples */
int max_cache_pages; /* max memory size / PAGE_SIZE */