ALSA: seq: Reorganize kconfig and build

This is a slightly intensive rewrite of Kconfig and Makefile about
ALSA sequencer stuff.

The first major change is that the kconfig items for the sequencer are
moved to sound/core/seq/Kconfig.  OK, that's easy.

The substantial change is that, instead of hackish top-level module
selection in Makefile, we define a Kconfig item for each sequencer
module.  The driver that requires such sequencer components select
exclusively the kconfig items.  This is more straightforward and
standard way.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

6 files changed, 86 insertions, 67 deletions

diff --git a/sound/core/Kconfig b/sound/core/Kconfig
index d64dbee36986..90990eb1d250 100644
--- a/sound/core/Kconfig
+++ b/sound/core/Kconfig
@@ -33,31 +33,6 @@ config SND_JACK_INPUT_DEV
         depends on SND_JACK
         default y if INPUT=y || INPUT=SND
 
-config SND_SEQUENCER
-        tristate "Sequencer support"
-        select SND_TIMER
-        help
-          Say Y or M to enable MIDI sequencer and router support.  This
-          feature allows routing and enqueueing of MIDI events.  Events
-          can be processed at a given time.
-
-          Many programs require this feature, so you should enable it
-          unless you know what you're doing.
-
-config SND_SEQ_DUMMY
-        tristate "Sequencer dummy client"
-        depends on SND_SEQUENCER
-        help
-          Say Y here to enable the dummy sequencer client.  This client
-          is a simple MIDI-through client: all normal input events are
-          redirected to the output port immediately.
-
-          You don't need this unless you want to connect many MIDI
-          devices or applications together.
-
-          To compile this driver as a module, choose M here: the module
-          will be called snd-seq-dummy.
-
 config SND_OSSEMUL
         bool "Enable OSS Emulation"
         select SOUND_OSS_CORE
@@ -109,20 +84,6 @@ config SND_PCM_TIMER
           For some embedded devices, we may disable it to reduce memory
           footprint, about 20KB on x86_64 platform.
 
-config SND_SEQUENCER_OSS
-        tristate "OSS Sequencer API"
-        depends on SND_SEQUENCER
-        depends on SND_OSSEMUL
-        help
-          Say Y here to enable OSS sequencer emulation (both
-          /dev/sequencer and /dev/music interfaces).
-
-          Many programs still use the OSS API, so say Y.
-
-          If you choose M in "Sequencer support" (SND_SEQUENCER),
-          this will be compiled as a module. The module will be called
-          snd-seq-oss.
-
 config SND_HRTIMER
         tristate "HR-timer backend support"
         depends on HIGH_RES_TIMERS
@@ -135,14 +96,6 @@ config SND_HRTIMER
           To compile this driver as a module, choose M here: the module
           will be called snd-hrtimer.
 
-config SND_SEQ_HRTIMER_DEFAULT
-        bool "Use HR-timer as default sequencer timer"
-        depends on SND_HRTIMER && SND_SEQUENCER
-        default y
-        help
-          Say Y here to use the HR-timer backend as the default sequencer
-          timer.
-
 config SND_DYNAMIC_MINORS
         bool "Dynamic device file minor numbers"
         help
diff --git a/sound/core/seq/Kconfig b/sound/core/seq/Kconfig
index b851fd890a89..140e640e62a6 100644
--- a/sound/core/seq/Kconfig
+++ b/sound/core/seq/Kconfig
@@ -1,16 +1,62 @@
-# define SND_XXX_SEQ to min(SND_SEQUENCER,SND_XXX)
+config SND_SEQUENCER
+        tristate "Sequencer support"
+        select SND_TIMER
+        help
+          Say Y or M to enable MIDI sequencer and router support.  This
+          feature allows routing and enqueueing of MIDI events.  Events
+          can be processed at a given time.
 
-config SND_RAWMIDI_SEQ
-        def_tristate SND_SEQUENCER && SND_RAWMIDI
+          Many programs require this feature, so you should enable it
+          unless you know what you're doing.
 
-config SND_OPL3_LIB_SEQ
-        def_tristate SND_SEQUENCER && SND_OPL3_LIB
+if SND_SEQUENCER
 
-config SND_OPL4_LIB_SEQ
-        def_tristate SND_SEQUENCER && SND_OPL4_LIB
+config SND_SEQ_DUMMY
+        tristate "Sequencer dummy client"
+        help
+          Say Y here to enable the dummy sequencer client.  This client
+          is a simple MIDI-through client: all normal input events are
+          redirected to the output port immediately.
 
-config SND_SBAWE_SEQ
-        def_tristate SND_SEQUENCER && SND_SBAWE
+          You don't need this unless you want to connect many MIDI
+          devices or applications together.
+
+          To compile this driver as a module, choose M here: the module
+          will be called snd-seq-dummy.
+
+config SND_SEQUENCER_OSS
+        tristate "OSS Sequencer API"
+        depends on SND_OSSEMUL
+        select SND_SEQ_MIDI_EVENT
+        help
+          Say Y here to enable OSS sequencer emulation (both
+          /dev/sequencer and /dev/music interfaces).
+
+          Many programs still use the OSS API, so say Y.
+
+          To compile this driver as a module, choose M here: the module
+          will be called snd-seq-oss.
+
+config SND_SEQ_HRTIMER_DEFAULT
+        bool "Use HR-timer as default sequencer timer"
+        depends on SND_HRTIMER
+        default y
+        help
+          Say Y here to use the HR-timer backend as the default sequencer
+          timer.
+
+config SND_SEQ_MIDI_EVENT
+        def_tristate SND_RAWMIDI
+
+config SND_SEQ_MIDI
+        tristate
+        select SND_SEQ_MIDI_EVENT
+
+config SND_SEQ_MIDI_EMUL
+        tristate
+
+config SND_SEQ_VIRMIDI
+        tristate
+
+endif # SND_SEQUENCER
 
-config SND_EMU10K1_SEQ
-        def_tristate SND_SEQUENCER && SND_EMU10K1
diff --git a/sound/core/seq/Makefile b/sound/core/seq/Makefile
index 3283b055e5ff..81a8ea537209 100644
--- a/sound/core/seq/Makefile
+++ b/sound/core/seq/Makefile
@@ -15,15 +15,10 @@ snd-seq-dummy-objs := seq_dummy.o
 snd-seq-virmidi-objs := seq_virmidi.o
 
 obj-$(CONFIG_SND_SEQUENCER) += snd-seq.o snd-seq-device.o
-obj-$(CONFIG_SND_SEQUENCER_OSS) += snd-seq-midi-event.o
 obj-$(CONFIG_SND_SEQUENCER_OSS) += oss/
 
 obj-$(CONFIG_SND_SEQ_DUMMY) += snd-seq-dummy.o
-
-# Toplevel Module Dependency
-obj-$(CONFIG_SND_VIRMIDI) += snd-seq-virmidi.o snd-seq-midi-event.o
-obj-$(CONFIG_SND_RAWMIDI_SEQ) += snd-seq-midi.o snd-seq-midi-event.o
-obj-$(CONFIG_SND_OPL3_LIB_SEQ) += snd-seq-midi-event.o snd-seq-midi-emul.o
-obj-$(CONFIG_SND_OPL4_LIB_SEQ) += snd-seq-midi-event.o snd-seq-midi-emul.o
-obj-$(CONFIG_SND_SBAWE_SEQ) += snd-seq-midi-emul.o snd-seq-virmidi.o
-obj-$(CONFIG_SND_EMU10K1_SEQ) += snd-seq-midi-emul.o snd-seq-virmidi.o
+obj-$(CONFIG_SND_SEQ_MIDI) += snd-seq-midi.o
+obj-$(CONFIG_SND_SEQ_MIDI_EMUL) += snd-seq-midi-emul.o
+obj-$(CONFIG_SND_SEQ_MIDI_EVENT) += snd-seq-midi-event.o
+obj-$(CONFIG_SND_SEQ_VIRMIDI) += snd-seq-virmidi.o
diff --git a/sound/drivers/Kconfig b/sound/drivers/Kconfig
index 8545da99b183..0e3dc80a7262 100644
--- a/sound/drivers/Kconfig
+++ b/sound/drivers/Kconfig
@@ -12,6 +12,17 @@ config SND_OPL4_LIB
         select SND_TIMER
         select SND_HWDEP
 
+# select SEQ stuff to min(SND_SEQUENCER,SND_XXX)
+config SND_OPL3_LIB_SEQ
+        def_tristate SND_SEQUENCER && SND_OPL3_LIB
+        select SND_SEQ_MIDI_EMUL
+        select SND_SEQ_MIDI_EVENT
+
+config SND_OPL4_LIB_SEQ
+        def_tristate SND_SEQUENCER && SND_OPL4_LIB
+        select SND_SEQ_MIDI_EMUL
+        select SND_SEQ_MIDI_EVENT
+
 config SND_VX_LIB
         tristate
         select FW_LOADER
@@ -99,6 +110,8 @@ config SND_VIRMIDI
         depends on SND_SEQUENCER
         select SND_TIMER
         select SND_RAWMIDI
+        select SND_SEQ_VIRMIDI
+        select SND_SEQ_MIDI_EVENT
         help
           Say Y here to include the virtual MIDI driver.  This driver
           allows to connect applications using raw MIDI devices to
diff --git a/sound/isa/Kconfig b/sound/isa/Kconfig
index 37adcc6cbe6b..bf1ab340e2a7 100644
--- a/sound/isa/Kconfig
+++ b/sound/isa/Kconfig
@@ -384,6 +384,12 @@ config SND_SBAWE
           To compile this driver as a module, choose M here: the module
           will be called snd-sbawe.
 
+# select SEQ stuff to min(SND_SEQUENCER,SND_XXX)
+config SND_SBAWE_SEQ
+        def_tristate SND_SEQUENCER && SND_SBAWE
+        select SND_SEQ_MIDI_EMUL
+        select SND_SEQ_VIRMIDI
+
 config SND_SB16_CSP
         bool "Sound Blaster 16/AWE CSP support"
         depends on (SND_SB16 || SND_SBAWE) && (BROKEN || !PPC)
diff --git a/sound/pci/Kconfig b/sound/pci/Kconfig
index 32151d8c6bb8..bc7acb489a43 100644
--- a/sound/pci/Kconfig
+++ b/sound/pci/Kconfig
@@ -477,6 +477,12 @@ config SND_EMU10K1
           To compile this driver as a module, choose M here: the module
           will be called snd-emu10k1.
 
+# select SEQ stuff to min(SND_SEQUENCER,SND_XXX)
+config SND_EMU10K1_SEQ
+        def_tristate SND_SEQUENCER && SND_EMU10K1
+        select SND_SEQ_MIDI_EMUL
+        select SND_SEQ_VIRMIDI
+
 config SND_EMU10K1X
         tristate "Emu10k1X (Dell OEM Version)"
         select SND_AC97_CODEC