firewire/fireface/ff-transaction.c

3  * ff-transaction.c - a part of driver for RME Fireface series
8 #include "ff.h"
10 static void finish_transmit_midi_msg(struct snd_ff *ff, unsigned int port,
14 				READ_ONCE(ff->rx_midi_substreams[port]);
17 		ff->rx_midi_error[port] = true;
23 		ff->next_ktime[port] = 0;
24 		schedule_work(&ff->rx_midi_work[port]);
28 	snd_rawmidi_transmit_ack(substream, ff->rx_bytes[port]);
29 	ff->rx_bytes[port] = 0;
32 		schedule_work(&ff->rx_midi_work[port]);
39 	struct snd_ff *ff =
41 	finish_transmit_midi_msg(ff, 0, rcode);
48 	struct snd_ff *ff =
50 	finish_transmit_midi_msg(ff, 1, rcode);
53 static void transmit_midi_msg(struct snd_ff *ff, unsigned int port)
56 			READ_ONCE(ff->rx_midi_substreams[port]);
59 	struct fw_device *fw_dev = fw_parent_device(ff->unit);
68 	if (ff->rx_bytes[port] > 0 || ff->rx_midi_error[port])
72 	if (ktime_after(ff->next_ktime[port], ktime_get())) {
73 		schedule_work(&ff->rx_midi_work[port]);
77 	quad_count = ff->spec->protocol->fill_midi_msg(ff, substream, port);
82 		addr = ff->spec->midi_rx_addrs[0];
85 		addr = ff->spec->midi_rx_addrs[1];
90 	ff->next_ktime[port] = ktime_add_ns(ktime_get(),
91 			ff->rx_bytes[port] * 8 * (NSEC_PER_SEC / 31250));
108 	fw_send_request(fw_dev->card, &ff->transactions[port], tcode,
110 			addr, &ff->msg_buf[port], quad_count * 4,
111 			callback, &ff->transactions[port]);
116 	struct snd_ff *ff = container_of(work, struct snd_ff, rx_midi_work[0]);
118 	transmit_midi_msg(ff, 0);
123 	struct snd_ff *ff = container_of(work, struct snd_ff, rx_midi_work[1]);
125 	transmit_midi_msg(ff, 1);
132 	struct snd_ff *ff = callback_data;
139 	offset -= ff->async_handler.offset;
141 	spin_lock_irqsave(&ff->lock, flag);
142 	ff->spec->protocol->handle_msg(ff, (unsigned int)offset, buf, length, tstamp);
143 	spin_unlock_irqrestore(&ff->lock, flag);
146 static int allocate_own_address(struct snd_ff *ff, int i)
151 	ff->async_handler.length = ff->spec->midi_addr_range;
152 	ff->async_handler.address_callback = handle_msg;
153 	ff->async_handler.callback_data = ff;
156 	midi_msg_region.end = midi_msg_region.start + ff->async_handler.length;
158 	err = fw_core_add_address_handler(&ff->async_handler, &midi_msg_region);
161 		if (ff->async_handler.offset & 0x0000ffffffff) {
162 			fw_core_remove_address_handler(&ff->async_handler);
177 int snd_ff_transaction_reregister(struct snd_ff *ff)
179 	struct fw_card *fw_card = fw_parent_device(ff->unit)->card;
187 	addr = (fw_card->node_id << 16) | (ff->async_handler.offset >> 32);
189 	return snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
190 				  ff->spec->midi_high_addr,
194 int snd_ff_transaction_register(struct snd_ff *ff)
203 		err = allocate_own_address(ff, i);
210 	err = snd_ff_transaction_reregister(ff);
214 	INIT_WORK(&ff->rx_midi_work[0], transmit_midi0_msg);
215 	INIT_WORK(&ff->rx_midi_work[1], transmit_midi1_msg);
220 void snd_ff_transaction_unregister(struct snd_ff *ff)
224 	if (ff->async_handler.callback_data == NULL)
226 	ff->async_handler.callback_data = NULL;
230 	snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
231 			   ff->spec->midi_high_addr,
234 	fw_core_remove_address_handler(&ff->async_handler);