[ALSA] emu10k1: Add module option uint subsystem.

EMU10K1/EMU10K2 driver
It allows the user to force the snd-emu10k1 module to think the user
has a particular sound card. Useful if their particular sound card
is not yet recognised.

Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>

2 files changed, 22 insertions, 9 deletions

diff --git a/sound/pci/emu10k1/emu10k1.c b/sound/pci/emu10k1/emu10k1.c
index 2f96b2fc74fb..b17142cabead 100644
--- a/sound/pci/emu10k1/emu10k1.c
+++ b/sound/pci/emu10k1/emu10k1.c
@@ -52,6 +52,7 @@ static int seq_ports[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 4};
 static int max_synth_voices[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 64};
 static int max_buffer_size[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 128};
 static int enable_ir[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 0};
+static uint subsystem[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 0}; /* Force card subsystem model */
 
 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for the EMU10K1 soundcard.");
@@ -71,7 +72,8 @@ module_param_array(max_buffer_size, int, NULL, 0444);
 MODULE_PARM_DESC(max_buffer_size, "Maximum sample buffer size in MB.");
 module_param_array(enable_ir, bool, NULL, 0444);
 MODULE_PARM_DESC(enable_ir, "Enable IR.");
-
+module_param_array(subsystem, uint, NULL, 0444);
+MODULE_PARM_DESC(subsystem, "Force card subsystem model.");
 /*
  * Class 0401: 1102:0008 (rev 00) Subsystem: 1102:1001 -> Audigy2 Value  Model:SB0400
  */
@@ -122,7 +124,7 @@ static int __devinit snd_card_emu10k1_probe(struct pci_dev *pci,
                 max_buffer_size[dev] = 1024;
         if ((err = snd_emu10k1_create(card, pci, extin[dev], extout[dev],
                                       (long)max_buffer_size[dev] * 1024 * 1024,
-                                      enable_ir[dev],
+                                      enable_ir[dev], subsystem[dev],
                                       &emu)) < 0) {
                 snd_card_free(card);
                 return err;
diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c
index 8bc9bc18c74b..4ced4b092539 100644
--- a/sound/pci/emu10k1/emu10k1_main.c
+++ b/sound/pci/emu10k1/emu10k1_main.c
@@ -832,6 +832,7 @@ int __devinit snd_emu10k1_create(snd_card_t * card,
                        unsigned short extout_mask,
                        long max_cache_bytes,
                        int enable_ir,
+                       uint subsystem,
                        emu10k1_t ** remu)
 {
         emu10k1_t *emu;
@@ -877,10 +878,16 @@ int __devinit snd_emu10k1_create(snd_card_t * card,
 
         for (c = emu_chip_details; c->vendor; c++) {
                 if (c->vendor == pci->vendor && c->device == pci->device) {
-                        if (c->subsystem && c->subsystem != emu->serial)
-                                continue;
-                        if (c->revision && c->revision != emu->revision)
-                                continue;
+                        if (subsystem) {
+                                if (c->subsystem && (c->subsystem == subsystem) ) {
+                                        break;
+                                } else continue;
+                        } else {
+                                if (c->subsystem && (c->subsystem != emu->serial) )
+                                        continue;
+                                if (c->revision && c->revision != emu->revision)
+                                        continue;
+                        }
                         break;
                 }
         }
@@ -891,10 +898,14 @@ int __devinit snd_emu10k1_create(snd_card_t * card,
                 return -ENOENT;
         }
         emu->card_capabilities = c;
-        if (c->subsystem != 0)
+        if (c->subsystem && !subsystem)
                 snd_printdd("Sound card name=%s\n", c->name);
-        else
-                snd_printdd("Sound card name=%s, vendor=0x%x, device=0x%x, subsystem=0x%x\n", c->name, pci->vendor, pci->device, emu->serial);
+        else if (subsystem) 
+                snd_printdd("Sound card name=%s, vendor=0x%x, device=0x%x, subsystem=0x%x. Forced to subsytem=0x%x\n",
+                        c->name, pci->vendor, pci->device, emu->serial, c->subsystem);
+        else 
+                snd_printdd("Sound card name=%s, vendor=0x%x, device=0x%x, subsystem=0x%x.\n",
+                        c->name, pci->vendor, pci->device, emu->serial);
         
         if (!*card->id && c->id) {
                 int i, n = 0;