ALSA: bebob: Add support for Focusrite Saffire/SaffirePro series

This commit allows this driver to support all of models which Focusrite
produces with DM1000/BeBoB. They are:
 - Saffire
 - Saffire LE
 - SaffirePro 10 I/O
 - SaffirePro 26 I/O

This commit adds Focusrite specific operations:
1. Get source of clock
2. Get/Set sampling frequency
3. Get metering information

The driver uses these functionalities to read/write specific address by async
transaction.

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

5 files changed, 314 insertions, 2 deletions

diff --git a/sound/firewire/Kconfig b/sound/firewire/Kconfig
index f8e484586221..605e44b14f83 100644
--- a/sound/firewire/Kconfig
+++ b/sound/firewire/Kconfig
@@ -112,6 +112,7 @@ config SND_BEBOB
           * Terratec EWS MIC2/EWS MIC4
           * Terratec Aureon 7.1 Firewire
           * Yamaha GO44/GO46
+          * Focusrite Saffire/Saffire LE/SaffirePro10 IO/SaffirePro26 IO
 
           To compile this driver as a module, choose M here: the module
           will be called snd-bebob.
diff --git a/sound/firewire/bebob/Makefile b/sound/firewire/bebob/Makefile
index c35eee105135..656542077b12 100644
--- a/sound/firewire/bebob/Makefile
+++ b/sound/firewire/bebob/Makefile
@@ -1,4 +1,4 @@
 snd-bebob-objs := bebob_command.o bebob_stream.o bebob_proc.o bebob_midi.o \
                   bebob_pcm.o bebob_hwdep.o bebob_terratec.o bebob_yamaha.o \
-                  bebob.o
+                  bebob_focusrite.o bebob.o
 obj-m += snd-bebob.o
diff --git a/sound/firewire/bebob/bebob.c b/sound/firewire/bebob/bebob.c
index 6a6350466fd4..6d23e44e635b 100644
--- a/sound/firewire/bebob/bebob.c
+++ b/sound/firewire/bebob/bebob.c
@@ -54,6 +54,9 @@ static DECLARE_BITMAP(devices_used, SNDRV_CARDS);
 #define VEN_PRISMSOUND  0x00001198
 #define VEN_TERRATEC    0x00000aac
 #define VEN_YAMAHA      0x0000a0de
+#define VEN_FOCUSRITE   0x0000130e
+
+#define MODEL_FOCUSRITE_SAFFIRE_BOTH    0x00000000
 
 static int
 name_device(struct snd_bebob *bebob, unsigned int vendor_id)
@@ -122,6 +125,20 @@ bebob_card_free(struct snd_card *card)
         mutex_destroy(&bebob->mutex);
 }
 
+static const struct snd_bebob_spec *
+get_saffire_spec(struct fw_unit *unit)
+{
+        char name[24] = {0};
+
+        if (fw_csr_string(unit->directory, CSR_MODEL, name, sizeof(name)) < 0)
+                return NULL;
+
+        if (strcmp(name, "SaffireLE") == 0)
+                return &saffire_le_spec;
+        else
+                return &saffire_spec;
+}
+
 static int
 bebob_probe(struct fw_unit *unit,
             const struct ieee1394_device_id *entry)
@@ -143,7 +160,11 @@ bebob_probe(struct fw_unit *unit,
                 goto end;
         }
 
-        spec = (const struct snd_bebob_spec *)entry->driver_data;
+        if ((entry->vendor_id == VEN_FOCUSRITE) &&
+            (entry->model_id == MODEL_FOCUSRITE_SAFFIRE_BOTH))
+                spec = get_saffire_spec(unit);
+        else
+                spec = (const struct snd_bebob_spec *)entry->driver_data;
         if (spec == NULL) {
                 err = -ENOSYS;
                 goto end;
@@ -306,6 +327,13 @@ static const struct ieee1394_device_id bebob_id_table[] = {
         SND_BEBOB_DEV_ENTRY(VEN_YAMAHA, 0x0010000b, &yamaha_go_spec),
         /* YAMAHA, GO46 */
         SND_BEBOB_DEV_ENTRY(VEN_YAMAHA, 0x0010000c, &yamaha_go_spec),
+        /* Focusrite, SaffirePro 26 I/O */
+        SND_BEBOB_DEV_ENTRY(VEN_FOCUSRITE, 0x00000003, &saffirepro_26_spec),
+        /* Focusrite, SaffirePro 10 I/O */
+        SND_BEBOB_DEV_ENTRY(VEN_FOCUSRITE, 0x00000006, &saffirepro_10_spec),
+        /* Focusrite, Saffire(no label and LE) */
+        SND_BEBOB_DEV_ENTRY(VEN_FOCUSRITE, MODEL_FOCUSRITE_SAFFIRE_BOTH,
+                            &saffire_spec),
         /* IDs are unknown but able to be supported */
         /*  Apogee, Mini-ME Firewire */
         /*  Apogee, Mini-DAC Firewire */
diff --git a/sound/firewire/bebob/bebob.h b/sound/firewire/bebob/bebob.h
index e92d356ce361..220b115785e2 100644
--- a/sound/firewire/bebob/bebob.h
+++ b/sound/firewire/bebob/bebob.h
@@ -228,6 +228,10 @@ int snd_bebob_create_hwdep_device(struct snd_bebob *bebob);
 extern struct snd_bebob_spec phase88_rack_spec;
 extern struct snd_bebob_spec phase24_series_spec;
 extern struct snd_bebob_spec yamaha_go_spec;
+extern struct snd_bebob_spec saffirepro_26_spec;
+extern struct snd_bebob_spec saffirepro_10_spec;
+extern struct snd_bebob_spec saffire_le_spec;
+extern struct snd_bebob_spec saffire_spec;
 
 #define SND_BEBOB_DEV_ENTRY(vendor, model, data) \
 { \
diff --git a/sound/firewire/bebob/bebob_focusrite.c b/sound/firewire/bebob/bebob_focusrite.c
new file mode 100644
index 000000000000..cd29dbc4b691
--- /dev/null
+++ b/sound/firewire/bebob/bebob_focusrite.c
@@ -0,0 +1,279 @@
+/*
+ * bebob_focusrite.c - a part of driver for BeBoB based devices
+ *
+ * Copyright (c) 2013-2014 Takashi Sakamoto
+ *
+ * Licensed under the terms of the GNU General Public License, version 2.
+ */
+
+#include "./bebob.h"
+
+#define ANA_IN  "Analog In"
+#define DIG_IN  "Digital In"
+#define ANA_OUT "Analog Out"
+#define DIG_OUT "Digital Out"
+#define STM_IN  "Stream In"
+
+#define SAFFIRE_ADDRESS_BASE                    0x000100000000
+
+#define SAFFIRE_OFFSET_CLOCK_SOURCE             0x0000000000f8
+#define SAFFIREPRO_OFFSET_CLOCK_SOURCE          0x000000000174
+
+/* whether sync to external device or not */
+#define SAFFIRE_OFFSET_CLOCK_SYNC_EXT           0x00000000013c
+#define SAFFIRE_LE_OFFSET_CLOCK_SYNC_EXT        0x000000000432
+#define SAFFIREPRO_OFFSET_CLOCK_SYNC_EXT        0x000000000164
+
+#define SAFFIRE_CLOCK_SOURCE_INTERNAL           0
+#define SAFFIRE_CLOCK_SOURCE_SPDIF              1
+
+/* '1' is absent, why... */
+#define SAFFIREPRO_CLOCK_SOURCE_INTERNAL        0
+#define SAFFIREPRO_CLOCK_SOURCE_SPDIF           2
+#define SAFFIREPRO_CLOCK_SOURCE_ADAT1           3
+#define SAFFIREPRO_CLOCK_SOURCE_ADAT2           4
+#define SAFFIREPRO_CLOCK_SOURCE_WORDCLOCK       5
+
+/* S/PDIF, ADAT1, ADAT2 is enabled or not. three quadlets */
+#define SAFFIREPRO_ENABLE_DIG_IFACES            0x0000000001a4
+
+/* saffirepro has its own parameter for sampling frequency */
+#define SAFFIREPRO_RATE_NOREBOOT                0x0000000001cc
+/* index is the value for this register */
+static const unsigned int rates[] = {
+        [0] = 0,
+        [1] = 44100,
+        [2] = 48000,
+        [3] = 88200,
+        [4] = 96000,
+        [5] = 176400,
+        [6] = 192000
+};
+
+/* saffire(no label)/saffire LE has metering */
+#define SAFFIRE_OFFSET_METER                    0x000000000100
+#define SAFFIRE_LE_OFFSET_METER                 0x000000000168
+
+static inline int
+saffire_read_block(struct snd_bebob *bebob, u64 offset,
+                   u32 *buf, unsigned int size)
+{
+        unsigned int i;
+        int err;
+        __be32 *tmp = (__be32 *)buf;
+
+        err =  snd_fw_transaction(bebob->unit, TCODE_READ_BLOCK_REQUEST,
+                                  SAFFIRE_ADDRESS_BASE + offset,
+                                  tmp, size, 0);
+        if (err < 0)
+                goto end;
+
+        for (i = 0; i < size / sizeof(u32); i++)
+                buf[i] = be32_to_cpu(tmp[i]);
+end:
+        return err;
+}
+
+static inline int
+saffire_read_quad(struct snd_bebob *bebob, u64 offset, u32 *value)
+{
+        int err;
+        __be32 tmp;
+
+        err = snd_fw_transaction(bebob->unit, TCODE_READ_QUADLET_REQUEST,
+                                 SAFFIRE_ADDRESS_BASE + offset,
+                                 &tmp, sizeof(__be32), 0);
+        if (err < 0)
+                goto end;
+
+        *value = be32_to_cpu(tmp);
+end:
+        return err;
+}
+
+static inline int
+saffire_write_quad(struct snd_bebob *bebob, u64 offset, u32 value)
+{
+        __be32 data = cpu_to_be32(value);
+
+        return snd_fw_transaction(bebob->unit, TCODE_WRITE_QUADLET_REQUEST,
+                                  SAFFIRE_ADDRESS_BASE + offset,
+                                  &data, sizeof(__be32), 0);
+}
+
+static char *const saffirepro_26_clk_src_labels[] = {
+        SND_BEBOB_CLOCK_INTERNAL, "S/PDIF", "ADAT1", "ADAT2", "Word Clock"
+};
+
+static char *const saffirepro_10_clk_src_labels[] = {
+        SND_BEBOB_CLOCK_INTERNAL, "S/PDIF", "Word Clock"
+};
+static int
+saffirepro_both_clk_freq_get(struct snd_bebob *bebob, unsigned int *rate)
+{
+        u32 id;
+        int err;
+
+        err = saffire_read_quad(bebob, SAFFIREPRO_RATE_NOREBOOT, &id);
+        if (err < 0)
+                goto end;
+        if (id >= ARRAY_SIZE(rates))
+                err = -EIO;
+        else
+                *rate = rates[id];
+end:
+        return err;
+}
+static int
+saffirepro_both_clk_freq_set(struct snd_bebob *bebob, unsigned int rate)
+{
+        u32 id;
+
+        for (id = 0; id < ARRAY_SIZE(rates); id++) {
+                if (rates[id] == rate)
+                        break;
+        }
+        if (id == ARRAY_SIZE(rates))
+                return -EINVAL;
+
+        return saffire_write_quad(bebob, SAFFIREPRO_RATE_NOREBOOT, id);
+}
+static int
+saffirepro_both_clk_src_get(struct snd_bebob *bebob, unsigned int *id)
+{
+        int err;
+        u32 value;
+
+        err = saffire_read_quad(bebob, SAFFIREPRO_OFFSET_CLOCK_SOURCE, &value);
+        if (err < 0)
+                goto end;
+
+        if (bebob->spec->clock->labels == saffirepro_10_clk_src_labels) {
+                if (value == SAFFIREPRO_CLOCK_SOURCE_WORDCLOCK)
+                        *id = 2;
+                else if (value == SAFFIREPRO_CLOCK_SOURCE_SPDIF)
+                        *id = 1;
+        } else if (value > 1) {
+                *id = value - 1;
+        }
+end:
+        return err;
+}
+
+struct snd_bebob_spec saffire_le_spec;
+static char *const saffire_both_clk_src_labels[] = {
+        SND_BEBOB_CLOCK_INTERNAL, "S/PDIF"
+};
+static int
+saffire_both_clk_src_get(struct snd_bebob *bebob, unsigned int *id)
+{
+        int err;
+        u32 value;
+
+        err = saffire_read_quad(bebob, SAFFIRE_OFFSET_CLOCK_SOURCE, &value);
+        if (err >= 0)
+                *id = 0xff & value;
+
+        return err;
+};
+static char *const saffire_le_meter_labels[] = {
+        ANA_IN, ANA_IN, DIG_IN,
+        ANA_OUT, ANA_OUT, ANA_OUT, ANA_OUT,
+        STM_IN, STM_IN
+};
+static char *const saffire_meter_labels[] = {
+        ANA_IN, ANA_IN,
+        STM_IN, STM_IN, STM_IN, STM_IN, STM_IN,
+};
+static int
+saffire_meter_get(struct snd_bebob *bebob, u32 *buf, unsigned int size)
+{
+        struct snd_bebob_meter_spec *spec = bebob->spec->meter;
+        unsigned int channels;
+        u64 offset;
+        int err;
+
+        if (spec->labels == saffire_le_meter_labels)
+                offset = SAFFIRE_LE_OFFSET_METER;
+        else
+                offset = SAFFIRE_OFFSET_METER;
+
+        channels = spec->num * 2;
+        if (size < channels * sizeof(u32))
+                return -EIO;
+
+        err = saffire_read_block(bebob, offset, buf, size);
+        if (err >= 0 && spec->labels == saffire_le_meter_labels) {
+                swap(buf[1], buf[3]);
+                swap(buf[2], buf[3]);
+                swap(buf[3], buf[4]);
+
+                swap(buf[7], buf[10]);
+                swap(buf[8], buf[10]);
+                swap(buf[9], buf[11]);
+                swap(buf[11], buf[12]);
+
+                swap(buf[15], buf[16]);
+        }
+
+        return err;
+}
+
+static struct snd_bebob_rate_spec saffirepro_both_rate_spec = {
+        .get    = &saffirepro_both_clk_freq_get,
+        .set    = &saffirepro_both_clk_freq_set,
+};
+/* Saffire Pro 26 I/O  */
+static struct snd_bebob_clock_spec saffirepro_26_clk_spec = {
+        .num    = ARRAY_SIZE(saffirepro_26_clk_src_labels),
+        .labels = saffirepro_26_clk_src_labels,
+        .get    = &saffirepro_both_clk_src_get,
+};
+struct snd_bebob_spec saffirepro_26_spec = {
+        .clock  = &saffirepro_26_clk_spec,
+        .rate   = &saffirepro_both_rate_spec,
+        .meter  = NULL
+};
+/* Saffire Pro 10 I/O */
+static struct snd_bebob_clock_spec saffirepro_10_clk_spec = {
+        .num    = ARRAY_SIZE(saffirepro_10_clk_src_labels),
+        .labels = saffirepro_10_clk_src_labels,
+        .get    = &saffirepro_both_clk_src_get,
+};
+struct snd_bebob_spec saffirepro_10_spec = {
+        .clock  = &saffirepro_10_clk_spec,
+        .rate   = &saffirepro_both_rate_spec,
+        .meter  = NULL
+};
+
+static struct snd_bebob_rate_spec saffire_both_rate_spec = {
+        .get    = &snd_bebob_stream_get_rate,
+        .set    = &snd_bebob_stream_set_rate,
+};
+static struct snd_bebob_clock_spec saffire_both_clk_spec = {
+        .num    = ARRAY_SIZE(saffire_both_clk_src_labels),
+        .labels = saffire_both_clk_src_labels,
+        .get    = &saffire_both_clk_src_get,
+};
+/* Saffire LE */
+struct snd_bebob_meter_spec saffire_le_meter_spec = {
+        .num    = ARRAY_SIZE(saffire_le_meter_labels),
+        .labels = saffire_le_meter_labels,
+        .get    = &saffire_meter_get,
+};
+struct snd_bebob_spec saffire_le_spec = {
+        .clock  = &saffire_both_clk_spec,
+        .rate   = &saffire_both_rate_spec,
+        .meter  = &saffire_le_meter_spec
+};
+/* Saffire */
+struct snd_bebob_meter_spec saffire_meter_spec = {
+        .num    = ARRAY_SIZE(saffire_meter_labels),
+        .labels = saffire_meter_labels,
+        .get    = &saffire_meter_get,
+};
+struct snd_bebob_spec saffire_spec = {
+        .clock  = &saffire_both_clk_spec,
+        .rate   = &saffire_both_rate_spec,
+        .meter  = &saffire_meter_spec
+};