ALSA: firewire-tascam: add proc node to show firmware information

TASCAM FireWire series has certain registers for firmware information.

This commit adds proc node to show the information.

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

diff --git a/sound/firewire/tascam/Makefile b/sound/firewire/tascam/Makefile
index 627129b..1555206 100644 (file)
--- a/sound/firewire/tascam/Makefile
+++ b/sound/firewire/tascam/Makefile
@@ -1,2 +1,2 @@
-snd-firewire-tascam-objs := tascam.o
+snd-firewire-tascam-objs := tascam-proc.o tascam.o
 obj-$(CONFIG_SND_FIREWIRE_TASCAM) += snd-firewire-tascam.o

diff --git a/sound/firewire/tascam/tascam-proc.c b/sound/firewire/tascam/tascam-proc.c
new file mode 100644 (file)
index 0000000..bfd4a4c
--- /dev/null
+++ b/sound/firewire/tascam/tascam-proc.c
@@ -0,0 +1,88 @@
+/*
+ * tascam-proc.h - a part of driver for TASCAM FireWire series
+ *
+ * Copyright (c) 2015 Takashi Sakamoto
+ *
+ * Licensed under the terms of the GNU General Public License, version 2.
+ */
+
+#include "./tascam.h"
+
+static void proc_read_firmware(struct snd_info_entry *entry,
+                              struct snd_info_buffer *buffer)
+{
+       struct snd_tscm *tscm = entry->private_data;
+       __be32 data;
+       unsigned int reg, fpga, arm, hw;
+       int err;
+
+       err = snd_fw_transaction(tscm->unit, TCODE_READ_QUADLET_REQUEST,
+                       TSCM_ADDR_BASE + TSCM_OFFSET_FIRMWARE_REGISTER,
+                       &data, sizeof(data), 0);
+       if (err < 0)
+               return;
+       reg = be32_to_cpu(data);
+
+       err = snd_fw_transaction(tscm->unit, TCODE_READ_QUADLET_REQUEST,
+                       TSCM_ADDR_BASE + TSCM_OFFSET_FIRMWARE_FPGA,
+                       &data, sizeof(data), 0);
+       if (err < 0)
+               return;
+       fpga = be32_to_cpu(data);
+
+       err = snd_fw_transaction(tscm->unit, TCODE_READ_QUADLET_REQUEST,
+                       TSCM_ADDR_BASE + TSCM_OFFSET_FIRMWARE_ARM,
+                       &data, sizeof(data), 0);
+       if (err < 0)
+               return;
+       arm = be32_to_cpu(data);
+
+       err = snd_fw_transaction(tscm->unit, TCODE_READ_QUADLET_REQUEST,
+                       TSCM_ADDR_BASE + TSCM_OFFSET_FIRMWARE_HW,
+                       &data, sizeof(data), 0);
+       if (err < 0)
+               return;
+       hw = be32_to_cpu(data);
+
+       snd_iprintf(buffer, "Register: %d (0x%08x)\n", reg & 0xffff, reg);
+       snd_iprintf(buffer, "FPGA:     %d (0x%08x)\n", fpga & 0xffff, fpga);
+       snd_iprintf(buffer, "ARM:      %d (0x%08x)\n", arm & 0xffff, arm);
+       snd_iprintf(buffer, "Hardware: %d (0x%08x)\n", hw >> 16, hw);
+}
+
+static void add_node(struct snd_tscm *tscm, struct snd_info_entry *root,
+                    const char *name,
+                    void (*op)(struct snd_info_entry *e,
+                               struct snd_info_buffer *b))
+{
+       struct snd_info_entry *entry;
+
+       entry = snd_info_create_card_entry(tscm->card, name, root);
+       if (entry == NULL)
+               return;
+
+       snd_info_set_text_ops(entry, tscm, op);
+       if (snd_info_register(entry) < 0)
+               snd_info_free_entry(entry);
+}
+
+void snd_tscm_proc_init(struct snd_tscm *tscm)
+{
+       struct snd_info_entry *root;
+
+       /*
+        * All nodes are automatically removed at snd_card_disconnect(),
+        * by following to link list.
+        */
+       root = snd_info_create_card_entry(tscm->card, "firewire",
+                                         tscm->card->proc_root);
+       if (root == NULL)
+               return;
+       root->mode = S_IFDIR | S_IRUGO | S_IXUGO;
+       if (snd_info_register(root) < 0) {
+               snd_info_free_entry(root);
+               return;
+       }
+
+       add_node(tscm, root, "firmware", proc_read_firmware);
+}

diff --git a/sound/firewire/tascam/tascam.c b/sound/firewire/tascam/tascam.c
index 9ac09cb..d7418c0 100644 (file)
--- a/sound/firewire/tascam/tascam.c
+++ b/sound/firewire/tascam/tascam.c
@@ -113,6 +113,8 @@ static int snd_tscm_probe(struct fw_unit *unit,
        if (err < 0)
                goto error;
 
+       snd_tscm_proc_init(tscm);
+
        err = snd_card_register(card);
        if (err < 0)
                goto error;

diff --git a/sound/firewire/tascam/tascam.h b/sound/firewire/tascam/tascam.h
index e12f8b5..9ecc550 100644 (file)
--- a/sound/firewire/tascam/tascam.h
+++ b/sound/firewire/tascam/tascam.h
@@ -20,6 +20,7 @@
 
 #include <sound/core.h>
 #include <sound/initval.h>
+#include <sound/info.h>
 
 #include "../lib.h"
 
@@ -43,4 +44,13 @@ struct snd_tscm {
        const struct snd_tscm_spec *spec;
 };
 
+#define TSCM_ADDR_BASE                 0xffff00000000ull
+
+#define TSCM_OFFSET_FIRMWARE_REGISTER  0x0000
+#define TSCM_OFFSET_FIRMWARE_FPGA      0x0004
+#define TSCM_OFFSET_FIRMWARE_ARM       0x0008
+#define TSCM_OFFSET_FIRMWARE_HW                0x000c
+
+void snd_tscm_proc_init(struct snd_tscm *tscm);
+
 #endif