diff options
Diffstat (limited to 'sound/firewire/fireface/ff-protocol-ff400.c')
| -rw-r--r-- | sound/firewire/fireface/ff-protocol-ff400.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/sound/firewire/fireface/ff-protocol-ff400.c b/sound/firewire/fireface/ff-protocol-ff400.c deleted file mode 100644 index 2280fab9b3c7..000000000000 --- a/sound/firewire/fireface/ff-protocol-ff400.c +++ /dev/null @@ -1,161 +0,0 @@ -/* - * 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 - -/* - * Fireface 400 manages isochronous channel number in 3 bit field. Therefore, - * we can allocate between 0 and 7 channel. - */ -static int keep_resources(struct snd_ff *ff, unsigned int rate) -{ - enum snd_ff_stream_mode mode; - int i; - int 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; - - err = snd_ff_stream_get_multiplier_mode(i, &mode); - if (err < 0) - return err; - - /* Keep resources for in-stream. */ - ff->tx_resources.channels_mask = 0x00000000000000ffuLL; - err = fw_iso_resources_allocate(&ff->tx_resources, - amdtp_stream_get_max_payload(&ff->tx_stream), - fw_parent_device(ff->unit)->max_speed); - if (err < 0) - return err; - - /* Keep resources for out-stream. */ - err = amdtp_ff_set_parameters(&ff->rx_stream, rate, - ff->spec->pcm_playback_channels[mode]); - if (err < 0) - return err; - ff->rx_resources.channels_mask = 0x00000000000000ffuLL; - err = fw_iso_resources_allocate(&ff->rx_resources, - amdtp_stream_get_max_payload(&ff->rx_stream), - fw_parent_device(ff->unit)->max_speed); - if (err < 0) - fw_iso_resources_free(&ff->tx_resources); - - return err; -} - -static int ff400_begin_session(struct snd_ff *ff, unsigned int rate) -{ - __le32 reg; - int err; - - err = keep_resources(ff, rate); - if (err < 0) - return err; - - /* 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 void ff400_handle_midi_msg(struct snd_ff *ff, __le32 *buf, size_t length) -{ - int i; - - for (i = 0; i < length / 4; i++) { - u32 quad = le32_to_cpu(buf[i]); - u8 byte; - unsigned int index; - struct snd_rawmidi_substream *substream; - - /* Message in first port. */ - /* - * This value may represent the index of this unit when the same - * units are on the same IEEE 1394 bus. This driver doesn't use - * it. - */ - index = (quad >> 8) & 0xff; - if (index > 0) { - substream = READ_ONCE(ff->tx_midi_substreams[0]); - if (substream != NULL) { - byte = quad & 0xff; - snd_rawmidi_receive(substream, &byte, 1); - } - } - - /* Message in second port. */ - index = (quad >> 24) & 0xff; - if (index > 0) { - substream = READ_ONCE(ff->tx_midi_substreams[1]); - if (substream != NULL) { - byte = (quad >> 16) & 0xff; - snd_rawmidi_receive(substream, &byte, 1); - } - } - } -} - -const struct snd_ff_protocol snd_ff_protocol_ff400 = { - .handle_midi_msg = ff400_handle_midi_msg, - .begin_session = ff400_begin_session, - .finish_session = ff400_finish_session, -}; |