ALSA: oxfw: Split stream functionality to a new file and add a header file

This is a help for works in followed patches.

And this commit remove 'fw_unit_get()/fw_unit_put()' because these
are called by helper functions in 'snd-firewire-lib'.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

4 files changed, 159 insertions, 109 deletions

diff --git a/sound/firewire/oxfw/Makefile b/sound/firewire/oxfw/Makefile
index 9ca49c0fdc40..e15c4c07b49d 100644
--- a/sound/firewire/oxfw/Makefile
+++ b/sound/firewire/oxfw/Makefile
@@ -1,2 +1,2 @@
-snd-oxfw-objs := oxfw.o
+snd-oxfw-objs := oxfw-stream.o oxfw.o
 obj-m += snd-oxfw.o
diff --git a/sound/firewire/oxfw/oxfw-stream.c b/sound/firewire/oxfw/oxfw-stream.c
new file mode 100644
index 000000000000..ebd156f3e29d
--- /dev/null
+++ b/sound/firewire/oxfw/oxfw-stream.c
@@ -0,0 +1,80 @@
+/*
+ * oxfw_stream.c - a part of driver for OXFW970/971 based devices
+ *
+ * Copyright (c) 2014 Takashi Sakamoto
+ *
+ * Licensed under the terms of the GNU General Public License, version 2.
+ */
+
+#include "oxfw.h"
+
+int snd_oxfw_stream_init_simplex(struct snd_oxfw *oxfw)
+{
+        int err;
+
+        err = cmp_connection_init(&oxfw->in_conn, oxfw->unit,
+                                  CMP_INPUT, 0);
+        if (err < 0)
+                goto end;
+
+        err = amdtp_stream_init(&oxfw->rx_stream, oxfw->unit,
+                                AMDTP_OUT_STREAM, CIP_NONBLOCKING);
+        if (err < 0) {
+                amdtp_stream_destroy(&oxfw->rx_stream);
+                cmp_connection_destroy(&oxfw->in_conn);
+        }
+end:
+        return err;
+}
+
+static void stop_stream(struct snd_oxfw *oxfw)
+{
+        amdtp_stream_pcm_abort(&oxfw->rx_stream);
+        amdtp_stream_stop(&oxfw->rx_stream);
+        cmp_connection_break(&oxfw->in_conn);
+}
+
+int snd_oxfw_stream_start_simplex(struct snd_oxfw *oxfw)
+{
+        int err = 0;
+
+        if (amdtp_streaming_error(&oxfw->rx_stream))
+                stop_stream(oxfw);
+
+        if (amdtp_stream_running(&oxfw->rx_stream))
+                goto end;
+
+        err = cmp_connection_establish(&oxfw->in_conn,
+                        amdtp_stream_get_max_payload(&oxfw->rx_stream));
+        if (err < 0)
+                goto end;
+
+        err = amdtp_stream_start(&oxfw->rx_stream,
+                                 oxfw->in_conn.resources.channel,
+                                 oxfw->in_conn.speed);
+        if (err < 0)
+                stop_stream(oxfw);
+end:
+        return err;
+}
+
+void snd_oxfw_stream_stop_simplex(struct snd_oxfw *oxfw)
+{
+        stop_stream(oxfw);
+}
+
+void snd_oxfw_stream_destroy_simplex(struct snd_oxfw *oxfw)
+{
+        stop_stream(oxfw);
+
+        amdtp_stream_destroy(&oxfw->rx_stream);
+        cmp_connection_destroy(&oxfw->in_conn);
+}
+
+void snd_oxfw_stream_update_simplex(struct snd_oxfw *oxfw)
+{
+        if (cmp_connection_update(&oxfw->in_conn) < 0)
+                stop_stream(oxfw);
+        else
+                amdtp_stream_update(&oxfw->rx_stream);
+}
diff --git a/sound/firewire/oxfw/oxfw.c b/sound/firewire/oxfw/oxfw.c
index 55c687ef3247..40556677ea07 100644
--- a/sound/firewire/oxfw/oxfw.c
+++ b/sound/firewire/oxfw/oxfw.c
@@ -5,22 +5,7 @@
  * Licensed under the terms of the GNU General Public License, version 2.
  */
 
-#include <linux/device.h>
-#include <linux/firewire.h>
-#include <linux/firewire-constants.h>
-#include <linux/module.h>
-#include <linux/mod_devicetable.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <sound/control.h>
-#include <sound/core.h>
-#include <sound/initval.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include "../cmp.h"
-#include "../fcp.h"
-#include "../amdtp.h"
-#include "../lib.h"
+#include "oxfw.h"
 
 #define OXFORD_FIRMWARE_ID_ADDRESS      (CSR_REGISTER_BASE + 0x50000)
 /* 0x970?vvvv or 0x971?vvvv, where vvvv = firmware version */
@@ -35,29 +20,6 @@
 #define SPECIFIER_1394TA        0x00a02d
 #define VERSION_AVC             0x010001
 
-struct device_info {
-        const char *driver_name;
-        const char *short_name;
-        const char *long_name;
-        int (*pcm_constraints)(struct snd_pcm_runtime *runtime);
-        unsigned int mixer_channels;
-        u8 mute_fb_id;
-        u8 volume_fb_id;
-};
-
-struct snd_oxfw {
-        struct snd_card *card;
-        struct fw_unit *unit;
-        const struct device_info *device_info;
-        struct mutex mutex;
-        struct cmp_connection in_conn;
-        struct amdtp_stream rx_stream;
-        bool mute;
-        s16 volume[6];
-        s16 volume_min;
-        s16 volume_max;
-};
-
 MODULE_DESCRIPTION("Oxford Semiconductor FW970/971 driver");
 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
 MODULE_LICENSE("GPL v2");
@@ -180,14 +142,6 @@ static int oxfw_close(struct snd_pcm_substream *substream)
         return 0;
 }
 
-static void oxfw_stop_stream(struct snd_oxfw *oxfw)
-{
-        if (amdtp_stream_running(&oxfw->rx_stream)) {
-                amdtp_stream_stop(&oxfw->rx_stream);
-                cmp_connection_break(&oxfw->in_conn);
-        }
-}
-
 static int oxfw_hw_params(struct snd_pcm_substream *substream,
                            struct snd_pcm_hw_params *hw_params)
 {
@@ -195,8 +149,8 @@ static int oxfw_hw_params(struct snd_pcm_substream *substream,
         int err;
 
         mutex_lock(&oxfw->mutex);
-        oxfw_stop_stream(oxfw);
-        mutex_unlock(&oxfw->mutex);
+
+        snd_oxfw_stream_stop_simplex(oxfw);
 
         err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
                                                params_buffer_bytes(hw_params));
@@ -223,6 +177,7 @@ static int oxfw_hw_params(struct snd_pcm_substream *substream,
 err_buffer:
         snd_pcm_lib_free_vmalloc_buffer(substream);
 error:
+        mutex_unlock(&oxfw->mutex);
         return err;
 }
 
@@ -231,7 +186,7 @@ static int oxfw_hw_free(struct snd_pcm_substream *substream)
         struct snd_oxfw *oxfw = substream->private_data;
 
         mutex_lock(&oxfw->mutex);
-        oxfw_stop_stream(oxfw);
+        snd_oxfw_stream_stop_simplex(oxfw);
         mutex_unlock(&oxfw->mutex);
 
         return snd_pcm_lib_free_vmalloc_buffer(substream);
@@ -244,33 +199,15 @@ static int oxfw_prepare(struct snd_pcm_substream *substream)
 
         mutex_lock(&oxfw->mutex);
 
-        if (amdtp_streaming_error(&oxfw->rx_stream))
-                oxfw_stop_stream(oxfw);
-
-        if (!amdtp_stream_running(&oxfw->rx_stream)) {
-                err = cmp_connection_establish(&oxfw->in_conn,
-                        amdtp_stream_get_max_payload(&oxfw->rx_stream));
-                if (err < 0)
-                        goto err_mutex;
+        snd_oxfw_stream_stop_simplex(oxfw);
 
-                err = amdtp_stream_start(&oxfw->rx_stream,
-                                         oxfw->in_conn.resources.channel,
-                                         oxfw->in_conn.speed);
-                if (err < 0)
-                        goto err_connection;
-        }
-
-        mutex_unlock(&oxfw->mutex);
+        err = snd_oxfw_stream_start_simplex(oxfw);
+        if (err < 0)
+                goto end;
 
         amdtp_stream_pcm_prepare(&oxfw->rx_stream);
-
-        return 0;
-
-err_connection:
-        cmp_connection_break(&oxfw->in_conn);
-err_mutex:
+end:
         mutex_unlock(&oxfw->mutex);
-
         return err;
 }
 
@@ -615,9 +552,6 @@ static void oxfw_card_free(struct snd_card *card)
 {
         struct snd_oxfw *oxfw = card->private_data;
 
-        amdtp_stream_destroy(&oxfw->rx_stream);
-        cmp_connection_destroy(&oxfw->in_conn);
-        fw_unit_put(oxfw->unit);
         mutex_destroy(&oxfw->mutex);
 }
 
@@ -635,23 +569,13 @@ static int oxfw_probe(struct fw_unit *unit,
         if (err < 0)
                 return err;
 
+        card->private_free = oxfw_card_free;
         oxfw = card->private_data;
         oxfw->card = card;
         mutex_init(&oxfw->mutex);
-        oxfw->unit = fw_unit_get(unit);
+        oxfw->unit = unit;
         oxfw->device_info = (const struct device_info *)id->driver_data;
 
-        err = cmp_connection_init(&oxfw->in_conn, unit, CMP_INPUT, 0);
-        if (err < 0)
-                goto err_unit;
-
-        err = amdtp_stream_init(&oxfw->rx_stream, unit, AMDTP_OUT_STREAM,
-                                CIP_NONBLOCKING);
-        if (err < 0)
-                goto err_connection;
-
-        card->private_free = oxfw_card_free;
-
         strcpy(card->driver, oxfw->device_info->driver_name);
         strcpy(card->shortname, oxfw->device_info->short_name);
         firmware = oxfw_read_firmware_version(unit);
@@ -671,19 +595,18 @@ static int oxfw_probe(struct fw_unit *unit,
         if (err < 0)
                 goto error;
 
-        err = snd_card_register(card);
+        err = snd_oxfw_stream_init_simplex(oxfw);
         if (err < 0)
                 goto error;
 
+        err = snd_card_register(card);
+        if (err < 0) {
+                snd_oxfw_stream_destroy_simplex(oxfw);
+                goto error;
+        }
         dev_set_drvdata(&unit->device, oxfw);
 
         return 0;
-
-err_connection:
-        cmp_connection_destroy(&oxfw->in_conn);
-err_unit:
-        fw_unit_put(oxfw->unit);
-        mutex_destroy(&oxfw->mutex);
 error:
         snd_card_free(card);
         return err;
@@ -695,27 +618,18 @@ static void oxfw_bus_reset(struct fw_unit *unit)
 
         fcp_bus_reset(oxfw->unit);
 
-        if (cmp_connection_update(&oxfw->in_conn) < 0) {
-                amdtp_stream_pcm_abort(&oxfw->rx_stream);
-                mutex_lock(&oxfw->mutex);
-                oxfw_stop_stream(oxfw);
-                mutex_unlock(&oxfw->mutex);
-                return;
-        }
-
-        amdtp_stream_update(&oxfw->rx_stream);
+        mutex_lock(&oxfw->mutex);
+        snd_oxfw_stream_update_simplex(oxfw);
+        mutex_unlock(&oxfw->mutex);
 }
 
 static void oxfw_remove(struct fw_unit *unit)
 {
         struct snd_oxfw *oxfw = dev_get_drvdata(&unit->device);
 
-        amdtp_stream_pcm_abort(&oxfw->rx_stream);
         snd_card_disconnect(oxfw->card);
 
-        mutex_lock(&oxfw->mutex);
-        oxfw_stop_stream(oxfw);
-        mutex_unlock(&oxfw->mutex);
+        snd_oxfw_stream_destroy_simplex(oxfw);
 
         snd_card_free_when_closed(oxfw->card);
 }
diff --git a/sound/firewire/oxfw/oxfw.h b/sound/firewire/oxfw/oxfw.h
new file mode 100644
index 000000000000..e5836e02b48c
--- /dev/null
+++ b/sound/firewire/oxfw/oxfw.h
@@ -0,0 +1,56 @@
+/*
+ * oxfw.h - a part of driver for OXFW970/971 based devices
+ *
+ * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
+ * Licensed under the terms of the GNU General Public License, version 2.
+ */
+
+#include <linux/device.h>
+#include <linux/firewire.h>
+#include <linux/firewire-constants.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
+
+#include <sound/control.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+
+#include "../lib.h"
+#include "../fcp.h"
+#include "../packets-buffer.h"
+#include "../iso-resources.h"
+#include "../amdtp.h"
+#include "../cmp.h"
+
+struct device_info {
+        const char *driver_name;
+        const char *short_name;
+        const char *long_name;
+        int (*pcm_constraints)(struct snd_pcm_runtime *runtime);
+        unsigned int mixer_channels;
+        u8 mute_fb_id;
+        u8 volume_fb_id;
+};
+
+struct snd_oxfw {
+        struct snd_card *card;
+        struct fw_unit *unit;
+        const struct device_info *device_info;
+        struct mutex mutex;
+        struct cmp_connection in_conn;
+        struct amdtp_stream rx_stream;
+        bool mute;
+        s16 volume[6];
+        s16 volume_min;
+        s16 volume_max;
+};
+
+int snd_oxfw_stream_init_simplex(struct snd_oxfw *oxfw);
+int snd_oxfw_stream_start_simplex(struct snd_oxfw *oxfw);
+void snd_oxfw_stream_stop_simplex(struct snd_oxfw *oxfw);
+void snd_oxfw_stream_destroy_simplex(struct snd_oxfw *oxfw);
+void snd_oxfw_stream_update_simplex(struct snd_oxfw *oxfw);