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 35 u64 addr; 36 struct fw_transaction transaction; 37 38 u8 *buf; 39 unsigned int len; 40 41 struct snd_rawmidi_substream *substream; 42 snd_fw_async_midi_port_fill fill; 43 unsigned int consume_bytes; 44 }; 45 46 int snd_fw_async_midi_port_init(struct snd_fw_async_midi_port *port, 47 struct fw_unit *unit, u64 addr, unsigned int len, 48 snd_fw_async_midi_port_fill fill); 49 void snd_fw_async_midi_port_destroy(struct snd_fw_async_midi_port *port); 50 51 /** 52 * snd_fw_async_midi_port_run - run transactions for the async MIDI port 53 * @port: the asynchronous MIDI port 54 * @substream: the MIDI substream 55 */ 56 static inline void 57 snd_fw_async_midi_port_run(struct snd_fw_async_midi_port *port, 58 struct snd_rawmidi_substream *substream) 59 { 60 port->substream = substream; 61 schedule_work(&port->work); 62 } 63 64 /** 65 * snd_fw_async_midi_port_finish - finish the asynchronous MIDI port 66 * @port: the asynchronous MIDI port 67 */ 68 static inline void 69 snd_fw_async_midi_port_finish(struct snd_fw_async_midi_port *port) 70 { 71 port->substream = NULL; 72 } 73 74 #endif 75