ALSA: fireworks: Add proc interface for debugging purpose

This commit adds proc interface to output infomation for debugging.
 - firmware information
 - sampling rate and clock source
 - physical metering (linear value)
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/fireworks/Makefile

 snd-fireworks-objs := fireworks_transaction.o fireworks_command.o \
-		      fireworks_stream.o fireworks.o
+		      fireworks_stream.o fireworks_proc.o fireworks.o
 obj-m += snd-fireworks.o

sound/firewire/fireworks/fireworks.c

@@ -150,6 +150,21 @@ get_hardware_info(struct snd_efw *efw)
 	efw->pcm_playback_channels[0] = hwinfo->amdtp_rx_pcm_channels;
 	efw->pcm_playback_channels[1] = hwinfo->amdtp_rx_pcm_channels_2x;
 	efw->pcm_playback_channels[2] = hwinfo->amdtp_rx_pcm_channels_4x;
+
+	/* Hardware metering. */
+	if (hwinfo->phys_in_grp_count  > HWINFO_MAX_CAPS_GROUPS ||
+	    hwinfo->phys_out_grp_count > HWINFO_MAX_CAPS_GROUPS) {
+		return -EIO;
+		goto end;
+	}
+	efw->phys_in = hwinfo->phys_in;
+	efw->phys_out = hwinfo->phys_out;
+	efw->phys_in_grp_count = hwinfo->phys_in_grp_count;
+	efw->phys_out_grp_count = hwinfo->phys_out_grp_count;
+	memcpy(&efw->phys_in_grps, hwinfo->phys_in_grps,
+	       sizeof(struct snd_efw_phys_grp) * hwinfo->phys_in_grp_count);
+	memcpy(&efw->phys_out_grps, hwinfo->phys_out_grps,
+	       sizeof(struct snd_efw_phys_grp) * hwinfo->phys_out_grp_count);
 end:
 	kfree(hwinfo);
 	return err;
@@ -209,6 +224,8 @@ efw_probe(struct fw_unit *unit,
 	if (entry->model_id == MODEL_ECHO_AUDIOFIRE_9)
 		efw->is_af9 = true;
 
+	snd_efw_proc_init(efw);
+
 	err = snd_efw_stream_init_duplex(efw);
 	if (err < 0)
 		goto error;

sound/firewire/fireworks/fireworks.h

@@ -21,6 +21,7 @@
 #include <sound/core.h>
 #include <sound/initval.h>
 #include <sound/pcm.h>
+#include <sound/info.h>
 
 #include "../packets-buffer.h"
 #include "../iso-resources.h"
@@ -79,6 +80,14 @@ struct snd_efw {
 	struct cmp_connection in_conn;
 	atomic_t capture_substreams;
 	atomic_t playback_substreams;
+
+	/* hardware metering parameters */
+	unsigned int phys_out;
+	unsigned int phys_in;
+	unsigned int phys_out_grp_count;
+	unsigned int phys_in_grp_count;
+	struct snd_efw_phys_grp phys_out_grps[HWINFO_MAX_CAPS_GROUPS];
+	struct snd_efw_phys_grp phys_in_grps[HWINFO_MAX_CAPS_GROUPS];
 };
 
 struct snd_efw_transaction {
@@ -187,6 +196,8 @@ void snd_efw_stream_stop_duplex(struct snd_efw *efw);
 void snd_efw_stream_update_duplex(struct snd_efw *efw);
 void snd_efw_stream_destroy_duplex(struct snd_efw *efw);
 
+void snd_efw_proc_init(struct snd_efw *efw);
+
 #define SND_EFW_DEV_ENTRY(vendor, model) \
 { \
 	.match_flags	= IEEE1394_MATCH_VENDOR_ID | \

sound/firewire/fireworks/fireworks_proc.c

+/*
+ * fireworks_proc.c - a part of driver for Fireworks based devices
+ *
+ * Copyright (c) 2009-2010 Clemens Ladisch
+ * Copyright (c) 2013-2014 Takashi Sakamoto
+ *
+ * Licensed under the terms of the GNU General Public License, version 2.
+ */
+
+#include "./fireworks.h"
+
+static inline const char*
+get_phys_name(struct snd_efw_phys_grp *grp, bool input)
+{
+	const char *const ch_type[] = {
+		"Analog", "S/PDIF", "ADAT", "S/PDIF or ADAT", "Mirroring",
+		"Headphones", "I2S", "Guitar", "Pirzo Guitar", "Guitar String",
+	};
+
+	if (grp->type < ARRAY_SIZE(ch_type))
+		return ch_type[grp->type];
+	else if (input)
+		return "Input";
+	else
+		return "Output";
+}
+
+static void
+proc_read_hwinfo(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
+{
+	struct snd_efw *efw = entry->private_data;
+	unsigned short i;
+	struct snd_efw_hwinfo *hwinfo;
+
+	hwinfo = kmalloc(sizeof(struct snd_efw_hwinfo), GFP_KERNEL);
+	if (hwinfo == NULL)
+		return;
+
+	if (snd_efw_command_get_hwinfo(efw, hwinfo) < 0)
+		goto end;
+
+	snd_iprintf(buffer, "guid_hi: 0x%X\n", hwinfo->guid_hi);
+	snd_iprintf(buffer, "guid_lo: 0x%X\n", hwinfo->guid_lo);
+	snd_iprintf(buffer, "type: 0x%X\n", hwinfo->type);
+	snd_iprintf(buffer, "version: 0x%X\n", hwinfo->version);
+	snd_iprintf(buffer, "vendor_name: %s\n", hwinfo->vendor_name);
+	snd_iprintf(buffer, "model_name: %s\n", hwinfo->model_name);
+
+	snd_iprintf(buffer, "dsp_version: 0x%X\n", hwinfo->dsp_version);
+	snd_iprintf(buffer, "arm_version: 0x%X\n", hwinfo->arm_version);
+	snd_iprintf(buffer, "fpga_version: 0x%X\n", hwinfo->fpga_version);
+
+	snd_iprintf(buffer, "flags: 0x%X\n", hwinfo->flags);
+
+	snd_iprintf(buffer, "max_sample_rate: 0x%X\n", hwinfo->max_sample_rate);
+	snd_iprintf(buffer, "min_sample_rate: 0x%X\n", hwinfo->min_sample_rate);
+	snd_iprintf(buffer, "supported_clock: 0x%X\n",
+		    hwinfo->supported_clocks);
+
+	snd_iprintf(buffer, "phys out: 0x%X\n", hwinfo->phys_out);
+	snd_iprintf(buffer, "phys in: 0x%X\n", hwinfo->phys_in);
+
+	snd_iprintf(buffer, "phys in grps: 0x%X\n",
+		    hwinfo->phys_in_grp_count);
+	for (i = 0; i < hwinfo->phys_in_grp_count; i++) {
+		snd_iprintf(buffer,
+			    "phys in grp[0x%d]: type 0x%d, count 0x%d\n",
+			    i, hwinfo->phys_out_grps[i].type,
+			    hwinfo->phys_out_grps[i].count);
+	}
+
+	snd_iprintf(buffer, "phys out grps: 0x%X\n",
+		    hwinfo->phys_out_grp_count);
+	for (i = 0; i < hwinfo->phys_out_grp_count; i++) {
+		snd_iprintf(buffer,
+			    "phys out grps[0x%d]: type 0x%d, count 0x%d\n",
+			    i, hwinfo->phys_out_grps[i].type,
+			    hwinfo->phys_out_grps[i].count);
+	}
+
+	snd_iprintf(buffer, "amdtp rx pcm channels 1x: 0x%X\n",
+		    hwinfo->amdtp_rx_pcm_channels);
+	snd_iprintf(buffer, "amdtp tx pcm channels 1x: 0x%X\n",
+		    hwinfo->amdtp_tx_pcm_channels);
+	snd_iprintf(buffer, "amdtp rx pcm channels 2x: 0x%X\n",
+		    hwinfo->amdtp_rx_pcm_channels_2x);
+	snd_iprintf(buffer, "amdtp tx pcm channels 2x: 0x%X\n",
+		    hwinfo->amdtp_tx_pcm_channels_2x);
+	snd_iprintf(buffer, "amdtp rx pcm channels 4x: 0x%X\n",
+		    hwinfo->amdtp_rx_pcm_channels_4x);
+	snd_iprintf(buffer, "amdtp tx pcm channels 4x: 0x%X\n",
+		    hwinfo->amdtp_tx_pcm_channels_4x);
+
+	snd_iprintf(buffer, "midi out ports: 0x%X\n", hwinfo->midi_out_ports);
+	snd_iprintf(buffer, "midi in ports: 0x%X\n", hwinfo->midi_in_ports);
+
+	snd_iprintf(buffer, "mixer playback channels: 0x%X\n",
+		    hwinfo->mixer_playback_channels);
+	snd_iprintf(buffer, "mixer capture channels: 0x%X\n",
+		    hwinfo->mixer_capture_channels);
+end:
+	kfree(hwinfo);
+}
+
+static void
+proc_read_clock(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
+{
+	struct snd_efw *efw = entry->private_data;
+	enum snd_efw_clock_source clock_source;
+	unsigned int sampling_rate;
+
+	if (snd_efw_command_get_clock_source(efw, &clock_source) < 0)
+		return;
+
+	if (snd_efw_command_get_sampling_rate(efw, &sampling_rate) < 0)
+		return;
+
+	snd_iprintf(buffer, "Clock Source: %d\n", clock_source);
+	snd_iprintf(buffer, "Sampling Rate: %d\n", sampling_rate);
+}
+
+/*
+ * NOTE:
+ *  dB = 20 * log10(linear / 0x01000000)
+ *  -144.0 dB when linear is 0
+ */
+static void
+proc_read_phys_meters(struct snd_info_entry *entry,
+		      struct snd_info_buffer *buffer)
+{
+	struct snd_efw *efw = entry->private_data;
+	struct snd_efw_phys_meters *meters;
+	unsigned int g, c, m, max, size;
+	const char *name;
+	u32 *linear;
+	int err;
+
+	size = sizeof(struct snd_efw_phys_meters) +
+	       (efw->phys_in + efw->phys_out) * sizeof(u32);
+	meters = kzalloc(size, GFP_KERNEL);
+	if (meters == NULL)
+		return;
+
+	err = snd_efw_command_get_phys_meters(efw, meters, size);
+	if (err < 0)
+		goto end;
+
+	snd_iprintf(buffer, "Physical Meters:\n");
+
+	m = 0;
+	max = min(efw->phys_out, meters->out_meters);
+	linear = meters->values;
+	snd_iprintf(buffer, " %d Outputs:\n", max);
+	for (g = 0; g < efw->phys_out_grp_count; g++) {
+		name = get_phys_name(&efw->phys_out_grps[g], false);
+		for (c = 0; c < efw->phys_out_grps[g].count; c++) {
+			if (m < max)
+				snd_iprintf(buffer, "\t%s [%d]: %d\n",
+					    name, c, linear[m++]);
+		}
+	}
+
+	m = 0;
+	max = min(efw->phys_in, meters->in_meters);
+	linear = meters->values + meters->out_meters;
+	snd_iprintf(buffer, " %d Inputs:\n", max);
+	for (g = 0; g < efw->phys_in_grp_count; g++) {
+		name = get_phys_name(&efw->phys_in_grps[g], true);
+		for (c = 0; c < efw->phys_in_grps[g].count; c++)
+			if (m < max)
+				snd_iprintf(buffer, "\t%s [%d]: %d\n",
+					    name, c, linear[m++]);
+	}
+end:
+	kfree(meters);
+}
+
+static void
+add_node(struct snd_efw *efw, 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(efw->card, name, root);
+	if (entry == NULL)
+		return;
+
+	snd_info_set_text_ops(entry, efw, op);
+	if (snd_info_register(entry) < 0)
+		snd_info_free_entry(entry);
+}
+
+void snd_efw_proc_init(struct snd_efw *efw)
+{
+	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(efw->card, "firewire",
+					  efw->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(efw, root, "clock", proc_read_clock);
+	add_node(efw, root, "firmware", proc_read_hwinfo);
+	add_node(efw, root, "meters", proc_read_phys_meters);
+}