ALSA: emu10k1: Emu10k2 32 bit DMA mode

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>

5 files changed, 30 insertions, 18 deletions

diff --git a/include/sound/emu10k1.h b/include/sound/emu10k1.h
index 0de95ccb92cf..5bd134651f5e 100644
--- a/include/sound/emu10k1.h
+++ b/include/sound/emu10k1.h
@@ -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 */
diff --git a/sound/pci/emu10k1/emu10k1_callback.c b/sound/pci/emu10k1/emu10k1_callback.c
index 874cd76c7b7f..d2c7ea3a7610 100644
--- a/sound/pci/emu10k1/emu10k1_callback.c
+++ b/sound/pci/emu10k1/emu10k1_callback.c
@@ -415,7 +415,7 @@ start_voice(struct snd_emux_voice *vp)
         snd_emu10k1_ptr_write(hw, Z2, ch, 0);
 
         /* invalidate maps */
-        temp = (hw->silent_page.addr << 1) | MAP_PTI_MASK;
+        temp = (hw->silent_page.addr << hw->address_mode) | (hw->address_mode ? MAP_PTI_MASK1 : MAP_PTI_MASK0);
         snd_emu10k1_ptr_write(hw, MAPA, ch, temp);
         snd_emu10k1_ptr_write(hw, MAPB, ch, temp);
 #if 0
@@ -436,7 +436,7 @@ start_voice(struct snd_emux_voice *vp)
                 snd_emu10k1_ptr_write(hw, CDF, ch, sample);
 
                 /* invalidate maps */
-                temp = ((unsigned int)hw->silent_page.addr << 1) | MAP_PTI_MASK;
+                temp = ((unsigned int)hw->silent_page.addr << hw_address_mode) | (hw->address_mode ? MAP_PTI_MASK1 : MAP_PTI_MASK0);
                 snd_emu10k1_ptr_write(hw, MAPA, ch, temp);
                 snd_emu10k1_ptr_write(hw, MAPB, ch, temp);
                 
diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c
index 4f8cf5e7e45f..a4548147c621 100644
--- a/sound/pci/emu10k1/emu10k1_main.c
+++ b/sound/pci/emu10k1/emu10k1_main.c
@@ -282,7 +282,7 @@ static int snd_emu10k1_init(struct snd_emu10k1 *emu, int enable_ir, int resume)
         snd_emu10k1_ptr_write(emu, TCB, 0, 0);  /* taken from original driver */
         snd_emu10k1_ptr_write(emu, TCBS, 0, 4); /* taken from original driver */
 
-        silent_page = (emu->silent_page.addr << 1) | MAP_PTI_MASK;
+        silent_page = (emu->silent_page.addr << emu->address_mode) | (emu->address_mode ? MAP_PTI_MASK1 : MAP_PTI_MASK0);
         for (ch = 0; ch < NUM_G; ch++) {
                 snd_emu10k1_ptr_write(emu, MAPA, ch, silent_page);
                 snd_emu10k1_ptr_write(emu, MAPB, ch, silent_page);
@@ -348,6 +348,11 @@ static int snd_emu10k1_init(struct snd_emu10k1 *emu, int enable_ir, int resume)
                 outl(reg | A_IOCFG_GPOUT0, emu->port + A_IOCFG);
         }
 
+        if (emu->address_mode == 0) {
+                /* use 16M in 4G */
+                outl(inl(emu->port + HCFG) | HCFG_EXPANDED_MEM, emu->port + HCFG);
+        }
+
         return 0;
 }
 
@@ -1902,8 +1907,10 @@ int snd_emu10k1_create(struct snd_card *card,
 
         is_audigy = emu->audigy = c->emu10k2_chip;
 
+        /* set addressing mode */
+        emu->address_mode = is_audigy ? 0 : 1;
         /* set the DMA transfer mask */
-        emu->dma_mask = is_audigy ? AUDIGY_DMA_MASK : EMU10K1_DMA_MASK;
+        emu->dma_mask = emu->address_mode ? EMU10K1_DMA_MASK : AUDIGY_DMA_MASK;
         if (pci_set_dma_mask(pci, emu->dma_mask) < 0 ||
             pci_set_consistent_dma_mask(pci, emu->dma_mask) < 0) {
                 dev_err(card->dev,
@@ -1928,7 +1935,7 @@ int snd_emu10k1_create(struct snd_card *card,
 
         emu->max_cache_pages = max_cache_bytes >> PAGE_SHIFT;
         if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
-                                32 * 1024, &emu->ptb_pages) < 0) {
+                                (emu->address_mode ? 32 : 16) * 1024, &emu->ptb_pages) < 0) {
                 err = -ENOMEM;
                 goto error;
         }
@@ -2027,8 +2034,8 @@ int snd_emu10k1_create(struct snd_card *card,
 
         /* Clear silent pages and set up pointers */
         memset(emu->silent_page.area, 0, PAGE_SIZE);
-        silent_page = emu->silent_page.addr << 1;
-        for (idx = 0; idx < MAXPAGES; idx++)
+        silent_page = emu->silent_page.addr << emu->address_mode;
+        for (idx = 0; idx < (emu->address_mode ? MAXPAGES1 : MAXPAGES0); idx++)
                 ((u32 *)emu->ptb_pages.area)[idx] = cpu_to_le32(silent_page | idx);
 
         /* set up voice indices */
diff --git a/sound/pci/emu10k1/emupcm.c b/sound/pci/emu10k1/emupcm.c
index 0dc07385af0e..14a305bd8a98 100644
--- a/sound/pci/emu10k1/emupcm.c
+++ b/sound/pci/emu10k1/emupcm.c
@@ -380,7 +380,7 @@ static void snd_emu10k1_pcm_init_voice(struct snd_emu10k1 *emu,
         snd_emu10k1_ptr_write(emu, Z1, voice, 0);
         snd_emu10k1_ptr_write(emu, Z2, voice, 0);
         /* invalidate maps */
-        silent_page = ((unsigned int)emu->silent_page.addr << 1) | MAP_PTI_MASK;
+        silent_page = ((unsigned int)emu->silent_page.addr << emu->address_mode) | (emu->address_mode ? MAP_PTI_MASK1 : MAP_PTI_MASK0);
         snd_emu10k1_ptr_write(emu, MAPA, voice, silent_page);
         snd_emu10k1_ptr_write(emu, MAPB, voice, silent_page);
         /* modulation envelope */
diff --git a/sound/pci/emu10k1/memory.c b/sound/pci/emu10k1/memory.c
index c68e6dd2fa67..4f1f69be1865 100644
--- a/sound/pci/emu10k1/memory.c
+++ b/sound/pci/emu10k1/memory.c
@@ -34,10 +34,11 @@
  * aligned pages in others
  */
 #define __set_ptb_entry(emu,page,addr) \
-        (((u32 *)(emu)->ptb_pages.area)[page] = cpu_to_le32(((addr) << 1) | (page)))
+        (((u32 *)(emu)->ptb_pages.area)[page] = cpu_to_le32(((addr) << (emu->address_mode)) | (page)))
 
 #define UNIT_PAGES              (PAGE_SIZE / EMUPAGESIZE)
-#define MAX_ALIGN_PAGES         (MAXPAGES / UNIT_PAGES)
+#define MAX_ALIGN_PAGES0                (MAXPAGES0 / UNIT_PAGES)
+#define MAX_ALIGN_PAGES1                (MAXPAGES1 / UNIT_PAGES)
 /* get aligned page from offset address */
 #define get_aligned_page(offset)        ((offset) >> PAGE_SHIFT)
 /* get offset address from aligned page */
@@ -124,7 +125,7 @@ static int search_empty_map_area(struct snd_emu10k1 *emu, int npages, struct lis
                 }
                 page = blk->mapped_page + blk->pages;
         }
-        size = MAX_ALIGN_PAGES - page;
+        size = (emu->address_mode ? MAX_ALIGN_PAGES1 : MAX_ALIGN_PAGES0) - page;
         if (size >= max_size) {
                 *nextp = pos;
                 return page;
@@ -181,7 +182,7 @@ static int unmap_memblk(struct snd_emu10k1 *emu, struct snd_emu10k1_memblk *blk)
                 q = get_emu10k1_memblk(p, mapped_link);
                 end_page = q->mapped_page;
         } else
-                end_page = MAX_ALIGN_PAGES;
+                end_page = (emu->address_mode ? MAX_ALIGN_PAGES1 : MAX_ALIGN_PAGES0);
 
         /* remove links */
         list_del(&blk->mapped_link);
@@ -307,7 +308,7 @@ snd_emu10k1_alloc_pages(struct snd_emu10k1 *emu, struct snd_pcm_substream *subst
         if (snd_BUG_ON(!emu))
                 return NULL;
         if (snd_BUG_ON(runtime->dma_bytes <= 0 ||
-                       runtime->dma_bytes >= MAXPAGES * EMUPAGESIZE))
+                       runtime->dma_bytes >= (emu->address_mode ? MAXPAGES1 : MAXPAGES0) * EMUPAGESIZE))
                 return NULL;
         hdr = emu->memhdr;
         if (snd_BUG_ON(!hdr))