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82 lines
2.0 KiB
82 lines
2.0 KiB
#ifndef SOUND_FIREWIRE_LIB_H_INCLUDED |
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#define SOUND_FIREWIRE_LIB_H_INCLUDED |
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#include <linux/firewire-constants.h> |
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#include <linux/types.h> |
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#include <linux/sched.h> |
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#include <sound/rawmidi.h> |
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struct fw_unit; |
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#define FW_GENERATION_MASK 0x00ff |
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#define FW_FIXED_GENERATION 0x0100 |
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#define FW_QUIET 0x0200 |
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int snd_fw_transaction(struct fw_unit *unit, int tcode, |
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u64 offset, void *buffer, size_t length, |
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unsigned int flags); |
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/* returns true if retrying the transaction would not make sense */ |
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static inline bool rcode_is_permanent_error(int rcode) |
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{ |
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return rcode == RCODE_TYPE_ERROR || rcode == RCODE_ADDRESS_ERROR; |
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} |
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void snd_fw_schedule_registration(struct fw_unit *unit, |
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struct delayed_work *dwork); |
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struct snd_fw_async_midi_port; |
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typedef int (*snd_fw_async_midi_port_fill)( |
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struct snd_rawmidi_substream *substream, |
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u8 *buf); |
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struct snd_fw_async_midi_port { |
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struct fw_device *parent; |
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struct work_struct work; |
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bool idling; |
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ktime_t next_ktime; |
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bool error; |
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u64 addr; |
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struct fw_transaction transaction; |
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u8 *buf; |
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unsigned int len; |
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struct snd_rawmidi_substream *substream; |
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snd_fw_async_midi_port_fill fill; |
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int consume_bytes; |
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}; |
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int snd_fw_async_midi_port_init(struct snd_fw_async_midi_port *port, |
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struct fw_unit *unit, u64 addr, unsigned int len, |
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snd_fw_async_midi_port_fill fill); |
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void snd_fw_async_midi_port_destroy(struct snd_fw_async_midi_port *port); |
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/** |
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* snd_fw_async_midi_port_run - run transactions for the async MIDI port |
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* @port: the asynchronous MIDI port |
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* @substream: the MIDI substream |
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*/ |
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static inline void |
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snd_fw_async_midi_port_run(struct snd_fw_async_midi_port *port, |
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struct snd_rawmidi_substream *substream) |
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{ |
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if (!port->error) { |
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port->substream = substream; |
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schedule_work(&port->work); |
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} |
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} |
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/** |
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* snd_fw_async_midi_port_finish - finish the asynchronous MIDI port |
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* @port: the asynchronous MIDI port |
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*/ |
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static inline void |
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snd_fw_async_midi_port_finish(struct snd_fw_async_midi_port *port) |
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{ |
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port->substream = NULL; |
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port->error = false; |
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} |
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#endif
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