1 #ifndef SOUND_FIREWIRE_LIB_H_INCLUDED 2 #define SOUND_FIREWIRE_LIB_H_INCLUDED 3 4 #include <linux/firewire-constants.h> 5 #include <linux/types.h> 6 #include <linux/sched.h> 7 #include <sound/rawmidi.h> 8 9 struct fw_unit; 10 11 #define FW_GENERATION_MASK 0x00ff 12 #define FW_FIXED_GENERATION 0x0100 13 #define FW_QUIET 0x0200 14 15 int snd_fw_transaction(struct fw_unit *unit, int tcode, 16 u64 offset, void *buffer, size_t length, 17 unsigned int flags); 18 19 /* returns true if retrying the transaction would not make sense */ 20 static inline bool rcode_is_permanent_error(int rcode) 21 { 22 return rcode == RCODE_TYPE_ERROR || rcode == RCODE_ADDRESS_ERROR; 23 } 24 25 struct snd_fw_async_midi_port; 26 typedef int (*snd_fw_async_midi_port_fill)( 27 struct snd_rawmidi_substream *substream, 28 u8 *buf); 29 30 struct snd_fw_async_midi_port { 31 struct fw_device *parent; 32 struct work_struct work; 33 bool idling; 34 ktime_t next_ktime; 35 36 u64 addr; 37 struct fw_transaction transaction; 38 39 u8 *buf; 40 unsigned int len; 41 42 struct snd_rawmidi_substream *substream; 43 snd_fw_async_midi_port_fill fill; 44 unsigned int consume_bytes; 45 }; 46 47 int snd_fw_async_midi_port_init(struct snd_fw_async_midi_port *port, 48 struct fw_unit *unit, u64 addr, unsigned int len, 49 snd_fw_async_midi_port_fill fill); 50 void snd_fw_async_midi_port_destroy(struct snd_fw_async_midi_port *port); 51 52 /** 53 * snd_fw_async_midi_port_run - run transactions for the async MIDI port 54 * @port: the asynchronous MIDI port 55 * @substream: the MIDI substream 56 */ 57 static inline void 58 snd_fw_async_midi_port_run(struct snd_fw_async_midi_port *port, 59 struct snd_rawmidi_substream *substream) 60 { 61 port->substream = substream; 62 schedule_work(&port->work); 63 } 64 65 /** 66 * snd_fw_async_midi_port_finish - finish the asynchronous MIDI port 67 * @port: the asynchronous MIDI port 68 */ 69 static inline void 70 snd_fw_async_midi_port_finish(struct snd_fw_async_midi_port *port) 71 { 72 port->substream = NULL; 73 } 74 75 #endif 76