--- /dev/null
+/*
+ * ff-protocol-ff400.c - a part of driver for RME Fireface series
+ *
+ * Copyright (c) 2015-2017 Takashi Sakamoto
+ *
+ * Licensed under the terms of the GNU General Public License, version 2.
+ */
+
+#include <linux/delay.h>
+#include "ff.h"
+
+#define FF400_STF 0x000080100500ull
+#define FF400_RX_PACKET_FORMAT 0x000080100504ull
+#define FF400_ISOC_COMM_START 0x000080100508ull
+#define FF400_TX_PACKET_FORMAT 0x00008010050cull
+#define FF400_ISOC_COMM_STOP 0x000080100510ull
+#define FF400_SYNC_STATUS 0x0000801c0000ull
+#define FF400_FETCH_PCM_FRAMES 0x0000801c0000ull /* For block request. */
+#define FF400_CLOCK_CONFIG 0x0000801c0004ull
+
+#define FF400_MIDI_HIGH_ADDR 0x0000801003f4ull
+#define FF400_MIDI_RX_PORT_0 0x000080180000ull
+#define FF400_MIDI_RX_PORT_1 0x000080190000ull
+
+static int ff400_get_clock(struct snd_ff *ff, unsigned int *rate,
+ enum snd_ff_clock_src *src)
+{
+ __le32 reg;
+ u32 data;
+ int err;
+
+ err = snd_fw_transaction(ff->unit, TCODE_READ_QUADLET_REQUEST,
+ FF400_SYNC_STATUS, ®, sizeof(reg), 0);
+ if (err < 0)
+ return err;
+ data = le32_to_cpu(reg);
+
+ /* Calculate sampling rate. */
+ switch ((data >> 1) & 0x03) {
+ case 0x01:
+ *rate = 32000;
+ break;
+ case 0x00:
+ *rate = 44100;
+ break;
+ case 0x03:
+ *rate = 48000;
+ break;
+ case 0x02:
+ default:
+ return -EIO;
+ }
+
+ if (data & 0x08)
+ *rate *= 2;
+ else if (data & 0x10)
+ *rate *= 4;
+
+ /* Calculate source of clock. */
+ if (data & 0x01) {
+ *src = SND_FF_CLOCK_SRC_INTERNAL;
+ } else {
+ /* TODO: 0x00, 0x01, 0x02, 0x06, 0x07? */
+ switch ((data >> 10) & 0x07) {
+ case 0x03:
+ *src = SND_FF_CLOCK_SRC_SPDIF;
+ break;
+ case 0x04:
+ *src = SND_FF_CLOCK_SRC_WORD;
+ break;
+ case 0x05:
+ *src = SND_FF_CLOCK_SRC_LTC;
+ break;
+ case 0x00:
+ default:
+ *src = SND_FF_CLOCK_SRC_ADAT;
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int ff400_begin_session(struct snd_ff *ff, unsigned int rate)
+{
+ __le32 reg;
+ int i, err;
+
+ /* Check whether the given value is supported or not. */
+ for (i = 0; i < CIP_SFC_COUNT; i++) {
+ if (amdtp_rate_table[i] == rate)
+ break;
+ }
+ if (i == CIP_SFC_COUNT)
+ return -EINVAL;
+
+ /* Set the number of data blocks transferred in a second. */
+ reg = cpu_to_le32(rate);
+ err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
+ FF400_STF, ®, sizeof(reg), 0);
+ if (err < 0)
+ return err;
+
+ msleep(100);
+
+ /*
+ * Set isochronous channel and the number of quadlets of received
+ * packets.
+ */
+ reg = cpu_to_le32(((ff->rx_stream.data_block_quadlets << 3) << 8) |
+ ff->rx_resources.channel);
+ err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
+ FF400_RX_PACKET_FORMAT, ®, sizeof(reg), 0);
+ if (err < 0)
+ return err;
+
+ /*
+ * Set isochronous channel and the number of quadlets of transmitted
+ * packet.
+ */
+ /* TODO: investigate the purpose of this 0x80. */
+ reg = cpu_to_le32((0x80 << 24) |
+ (ff->tx_resources.channel << 5) |
+ (ff->tx_stream.data_block_quadlets));
+ err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
+ FF400_TX_PACKET_FORMAT, ®, sizeof(reg), 0);
+ if (err < 0)
+ return err;
+
+ /* Allow to transmit packets. */
+ reg = cpu_to_le32(0x00000001);
+ return snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
+ FF400_ISOC_COMM_START, ®, sizeof(reg), 0);
+}
+
+static void ff400_finish_session(struct snd_ff *ff)
+{
+ __le32 reg;
+
+ reg = cpu_to_le32(0x80000000);
+ snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
+ FF400_ISOC_COMM_STOP, ®, sizeof(reg), 0);
+}
+
+static int ff400_switch_fetching_mode(struct snd_ff *ff, bool enable)
+{
+ __le32 *reg;
+ int i;
+
+ reg = kzalloc(sizeof(__le32) * 18, GFP_KERNEL);
+ if (reg == NULL)
+ return -ENOMEM;
+
+ if (enable) {
+ /*
+ * Each quadlet is corresponding to data channels in a data
+ * blocks in reverse order. Precisely, quadlets for available
+ * data channels should be enabled. Here, I take second best
+ * to fetch PCM frames from all of data channels regardless of
+ * stf.
+ */
+ for (i = 0; i < 18; ++i)
+ reg[i] = cpu_to_le32(0x00000001);
+ }
+
+ return snd_fw_transaction(ff->unit, TCODE_WRITE_BLOCK_REQUEST,
+ FF400_FETCH_PCM_FRAMES, reg,
+ sizeof(__le32) * 18, 0);
+}
+
+static void ff400_dump_sync_status(struct snd_ff *ff,
+ struct snd_info_buffer *buffer)
+{
+ __le32 reg;
+ u32 data;
+ int err;
+
+ err = snd_fw_transaction(ff->unit, TCODE_READ_QUADLET_REQUEST,
+ FF400_SYNC_STATUS, ®, sizeof(reg), 0);
+ if (err < 0)
+ return;
+
+ data = le32_to_cpu(reg);
+
+ snd_iprintf(buffer, "External source detection:\n");
+
+ snd_iprintf(buffer, "Word Clock:");
+ if ((data >> 24) & 0x20) {
+ if ((data >> 24) & 0x40)
+ snd_iprintf(buffer, "sync\n");
+ else
+ snd_iprintf(buffer, "lock\n");
+ } else {
+ snd_iprintf(buffer, "none\n");
+ }
+
+ snd_iprintf(buffer, "S/PDIF:");
+ if ((data >> 16) & 0x10) {
+ if ((data >> 16) & 0x04)
+ snd_iprintf(buffer, "sync\n");
+ else
+ snd_iprintf(buffer, "lock\n");
+ } else {
+ snd_iprintf(buffer, "none\n");
+ }
+
+ snd_iprintf(buffer, "ADAT:");
+ if ((data >> 8) & 0x04) {
+ if ((data >> 8) & 0x10)
+ snd_iprintf(buffer, "sync\n");
+ else
+ snd_iprintf(buffer, "lock\n");
+ } else {
+ snd_iprintf(buffer, "none\n");
+ }
+
+ snd_iprintf(buffer, "\nUsed external source:\n");
+
+ if (((data >> 22) & 0x07) == 0x07) {
+ snd_iprintf(buffer, "None\n");
+ } else {
+ switch ((data >> 22) & 0x07) {
+ case 0x00:
+ snd_iprintf(buffer, "ADAT:");
+ break;
+ case 0x03:
+ snd_iprintf(buffer, "S/PDIF:");
+ break;
+ case 0x04:
+ snd_iprintf(buffer, "Word:");
+ break;
+ case 0x07:
+ snd_iprintf(buffer, "Nothing:");
+ break;
+ case 0x01:
+ case 0x02:
+ case 0x05:
+ case 0x06:
+ default:
+ snd_iprintf(buffer, "unknown:");
+ break;
+ }
+
+ if ((data >> 25) & 0x07) {
+ switch ((data >> 25) & 0x07) {
+ case 0x01:
+ snd_iprintf(buffer, "32000\n");
+ break;
+ case 0x02:
+ snd_iprintf(buffer, "44100\n");
+ break;
+ case 0x03:
+ snd_iprintf(buffer, "48000\n");
+ break;
+ case 0x04:
+ snd_iprintf(buffer, "64000\n");
+ break;
+ case 0x05:
+ snd_iprintf(buffer, "88200\n");
+ break;
+ case 0x06:
+ snd_iprintf(buffer, "96000\n");
+ break;
+ case 0x07:
+ snd_iprintf(buffer, "128000\n");
+ break;
+ case 0x08:
+ snd_iprintf(buffer, "176400\n");
+ break;
+ case 0x09:
+ snd_iprintf(buffer, "192000\n");
+ break;
+ case 0x00:
+ snd_iprintf(buffer, "unknown\n");
+ break;
+ }
+ }
+ }
+
+ snd_iprintf(buffer, "Multiplied:");
+ snd_iprintf(buffer, "%d\n", (data & 0x3ff) * 250);
+}
+
+static void ff400_dump_clock_config(struct snd_ff *ff,
+ struct snd_info_buffer *buffer)
+{
+ __le32 reg;
+ u32 data;
+ unsigned int rate;
+ const char *src;
+ int err;
+
+ err = snd_fw_transaction(ff->unit, TCODE_READ_BLOCK_REQUEST,
+ FF400_CLOCK_CONFIG, ®, sizeof(reg), 0);
+ if (err < 0)
+ return;
+
+ data = le32_to_cpu(reg);
+
+ snd_iprintf(buffer, "Output S/PDIF format: %s (Emphasis: %s)\n",
+ (data & 0x20) ? "Professional" : "Consumer",
+ (data & 0x40) ? "on" : "off");
+
+ snd_iprintf(buffer, "Optical output interface format: %s\n",
+ ((data >> 8) & 0x01) ? "S/PDIF" : "ADAT");
+
+ snd_iprintf(buffer, "Word output single speed: %s\n",
+ ((data >> 8) & 0x20) ? "on" : "off");
+
+ snd_iprintf(buffer, "S/PDIF input interface: %s\n",
+ ((data >> 8) & 0x02) ? "Optical" : "Coaxial");
+
+ switch ((data >> 1) & 0x03) {
+ case 0x01:
+ rate = 32000;
+ break;
+ case 0x00:
+ rate = 44100;
+ break;
+ case 0x03:
+ rate = 48000;
+ break;
+ case 0x02:
+ default:
+ return;
+ }
+
+ if (data & 0x08)
+ rate *= 2;
+ else if (data & 0x10)
+ rate *= 4;
+
+ snd_iprintf(buffer, "Sampling rate: %d\n", rate);
+
+ if (data & 0x01) {
+ src = "Internal";
+ } else {
+ switch ((data >> 10) & 0x07) {
+ case 0x00:
+ src = "ADAT";
+ break;
+ case 0x03:
+ src = "S/PDIF";
+ break;
+ case 0x04:
+ src = "Word";
+ break;
+ case 0x05:
+ src = "LTC";
+ break;
+ default:
+ return;
+ }
+ }
+
+ snd_iprintf(buffer, "Sync to clock source: %s\n", src);
+}
+
+struct snd_ff_protocol snd_ff_protocol_ff400 = {
+ .get_clock = ff400_get_clock,
+ .begin_session = ff400_begin_session,
+ .finish_session = ff400_finish_session,
+ .switch_fetching_mode = ff400_switch_fetching_mode,
+
+ .dump_sync_status = ff400_dump_sync_status,
+ .dump_clock_config = ff400_dump_clock_config,
+
+ .midi_high_addr_reg = FF400_MIDI_HIGH_ADDR,
+ .midi_rx_port_0_reg = FF400_MIDI_RX_PORT_0,
+ .midi_rx_port_1_reg = FF400_MIDI_RX_PORT_1,
+};
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