From 230e5ab6a084ed50470f101934782dbf54b0d06b Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Sat, 6 Dec 1997 23:51:34 +0000 Subject: Merge with Linux 2.1.67. --- drivers/sound/pas2_midi.c | 326 +++++++++++++++++++++++----------------------- 1 file changed, 160 insertions(+), 166 deletions(-) (limited to 'drivers/sound/pas2_midi.c') diff --git a/drivers/sound/pas2_midi.c b/drivers/sound/pas2_midi.c index 05a509f91..45b60fefd 100644 --- a/drivers/sound/pas2_midi.c +++ b/drivers/sound/pas2_midi.c @@ -15,7 +15,7 @@ #include "sound_config.h" -#if defined(CONFIG_PAS) && defined(CONFIG_MIDI) +#if ( defined(MODULE) || defined(CONFIG_PAS) ) && defined(CONFIG_MIDI) static int midi_busy = 0, input_opened = 0; static int my_dev; @@ -27,87 +27,86 @@ static volatile unsigned char qhead, qtail; static void (*midi_input_intr) (int dev, unsigned char data); static int -pas_midi_open (int dev, int mode, - void (*input) (int dev, unsigned char data), - void (*output) (int dev) +pas_midi_open(int dev, int mode, + void (*input) (int dev, unsigned char data), + void (*output) (int dev) ) { - int err; - unsigned long flags; - unsigned char ctrl; + int err; + unsigned long flags; + unsigned char ctrl; - if (midi_busy) - { - printk ("PAS16: Midi busy\n"); - return -EBUSY; - } - - /* - * Reset input and output FIFO pointers - */ - pas_write (0x20 | 0x40, - 0x178b); - - save_flags (flags); - cli (); - - if ((err = pas_set_intr (0x10)) < 0) - return err; - - /* - * Enable input available and output FIFO empty interrupts - */ + if (midi_busy) + { + printk("PAS16: Midi busy\n"); + return -EBUSY; + } + /* + * Reset input and output FIFO pointers + */ + pas_write(0x20 | 0x40, + 0x178b); - ctrl = 0; - input_opened = 0; - midi_input_intr = input; + save_flags(flags); + cli(); - if (mode == OPEN_READ || mode == OPEN_READWRITE) - { - ctrl |= 0x04; /* Enable input */ - input_opened = 1; - } + if ((err = pas_set_intr(0x10)) < 0) + { + restore_flags(flags); + return err; + } + /* + * Enable input available and output FIFO empty interrupts + */ - if (mode == OPEN_WRITE || mode == OPEN_READWRITE) - { - ctrl |= 0x08 | 0x10; /* Enable output */ - } + ctrl = 0; + input_opened = 0; + midi_input_intr = input; - pas_write (ctrl, 0x178b); + if (mode == OPEN_READ || mode == OPEN_READWRITE) + { + ctrl |= 0x04; /* Enable input */ + input_opened = 1; + } + if (mode == OPEN_WRITE || mode == OPEN_READWRITE) + { + ctrl |= 0x08 | 0x10; /* Enable output */ + } + pas_write(ctrl, 0x178b); - /* - * Acknowledge any pending interrupts - */ + /* + * Acknowledge any pending interrupts + */ - pas_write (0xff, 0x1B88); + pas_write(0xff, 0x1B88); - restore_flags (flags); + restore_flags(flags); - midi_busy = 1; - qlen = qhead = qtail = 0; - return 0; + midi_busy = 1; + qlen = qhead = qtail = 0; + return 0; } static void -pas_midi_close (int dev) +pas_midi_close(int dev) { - /* - * Reset FIFO pointers, disable intrs - */ - pas_write (0x20 | 0x40, 0x178b); + /* + * Reset FIFO pointers, disable intrs + */ + pas_write(0x20 | 0x40, 0x178b); - pas_remove_intr (0x10); - midi_busy = 0; + pas_remove_intr(0x10); + midi_busy = 0; } static int -dump_to_midi (unsigned char midi_byte) +dump_to_midi(unsigned char midi_byte) { - int fifo_space, x; + int fifo_space, x; - fifo_space = ((x = pas_read (0x1B89)) >> 4) & 0x0f; + fifo_space = ((x = pas_read(0x1B89)) >> 4) & 0x0f; /* * The MIDI FIFO space register and it's documentation is nonunderstandable. @@ -117,91 +116,90 @@ dump_to_midi (unsigned char midi_byte) * means that the buffer is empty. */ - if (fifo_space < 2 && fifo_space != 0) /* Full (almost) */ - { - return 0; /* Ask upper layers to retry after some time */ - } - - pas_write (midi_byte, 0x178A); + if (fifo_space < 2 && fifo_space != 0) /* Full (almost) */ + { + return 0; /* Ask upper layers to retry after some time */ + } + pas_write(midi_byte, 0x178A); - return 1; + return 1; } static int -pas_midi_out (int dev, unsigned char midi_byte) +pas_midi_out(int dev, unsigned char midi_byte) { - unsigned long flags; + unsigned long flags; - /* - * Drain the local queue first - */ + /* + * Drain the local queue first + */ - save_flags (flags); - cli (); + save_flags(flags); + cli(); - while (qlen && dump_to_midi (tmp_queue[qhead])) - { - qlen--; - qhead++; - } + while (qlen && dump_to_midi(tmp_queue[qhead])) + { + qlen--; + qhead++; + } - restore_flags (flags); + restore_flags(flags); - /* - * Output the byte if the local queue is empty. - */ + /* + * Output the byte if the local queue is empty. + */ - if (!qlen) - if (dump_to_midi (midi_byte)) - return 1; + if (!qlen) + if (dump_to_midi(midi_byte)) + return 1; - /* - * Put to the local queue - */ + /* + * Put to the local queue + */ - if (qlen >= 256) - return 0; /* Local queue full */ + if (qlen >= 256) + return 0; /* Local queue full */ - save_flags (flags); - cli (); + save_flags(flags); + cli(); - tmp_queue[qtail] = midi_byte; - qlen++; - qtail++; + tmp_queue[qtail] = midi_byte; + qlen++; + qtail++; - restore_flags (flags); + restore_flags(flags); - return 1; + return 1; } static int -pas_midi_start_read (int dev) +pas_midi_start_read(int dev) { - return 0; + return 0; } static int -pas_midi_end_read (int dev) +pas_midi_end_read(int dev) { - return 0; + return 0; } static int -pas_midi_ioctl (int dev, unsigned cmd, caddr_t arg) +pas_midi_ioctl(int dev, unsigned cmd, caddr_t arg) { - return -EINVAL; + return -EINVAL; } static void -pas_midi_kick (int dev) +pas_midi_kick(int dev) { } static int -pas_buffer_status (int dev) +pas_buffer_status(int dev) { - return qlen; + return qlen; } #define MIDI_SYNTH_NAME "Pro Audio Spectrum Midi" @@ -210,80 +208,76 @@ pas_buffer_status (int dev) static struct midi_operations pas_midi_operations = { - {"Pro Audio Spectrum", 0, 0, SNDCARD_PAS}, - &std_midi_synth, - {0}, - pas_midi_open, - pas_midi_close, - pas_midi_ioctl, - pas_midi_out, - pas_midi_start_read, - pas_midi_end_read, - pas_midi_kick, - NULL, - pas_buffer_status, - NULL + {"Pro Audio Spectrum", 0, 0, SNDCARD_PAS}, + &std_midi_synth, + {0}, + pas_midi_open, + pas_midi_close, + pas_midi_ioctl, + pas_midi_out, + pas_midi_start_read, + pas_midi_end_read, + pas_midi_kick, + NULL, + pas_buffer_status, + NULL }; void -pas_midi_init (void) +pas_midi_init(void) { - if (num_midis >= MAX_MIDI_DEV) - { - printk ("Sound: Too many midi devices detected\n"); - return; - } - - std_midi_synth.midi_dev = my_dev = num_midis; - midi_devs[num_midis++] = &pas_midi_operations; - sequencer_init (); + int dev = sound_alloc_mididev(); + + if (dev == -1) + { + printk(KERN_WARNING "pas_midi_init: Too many midi devices detected\n"); + return; + } + std_midi_synth.midi_dev = my_dev = dev; + midi_devs[dev] = &pas_midi_operations; + sequencer_init(); } void -pas_midi_interrupt (void) +pas_midi_interrupt(void) { - unsigned char stat; - int i, incount; - unsigned long flags; - - stat = pas_read (0x1B88); + unsigned char stat; + int i, incount; + unsigned long flags; - if (stat & 0x04) /* Input data available */ - { - incount = pas_read (0x1B89) & 0x0f; /* Input FIFO size */ - if (!incount) - incount = 16; + stat = pas_read(0x1B88); - for (i = 0; i < incount; i++) - if (input_opened) + if (stat & 0x04) /* Input data available */ { - midi_input_intr (my_dev, pas_read (0x178A)); + incount = pas_read(0x1B89) & 0x0f; /* Input FIFO size */ + if (!incount) + incount = 16; + + for (i = 0; i < incount; i++) + if (input_opened) + { + midi_input_intr(my_dev, pas_read(0x178A)); + } else + pas_read(0x178A); /* Flush */ } - else - pas_read (0x178A); /* Flush */ - } - - if (stat & (0x08 | 0x10)) - { - save_flags (flags); - cli (); - - while (qlen && dump_to_midi (tmp_queue[qhead])) - { - qlen--; - qhead++; - } - - restore_flags (flags); - } - + if (stat & (0x08 | 0x10)) + { + save_flags(flags); + cli(); - if (stat & 0x40) - { - printk ("MIDI output overrun %x,%x\n", pas_read (0x1B89), stat); - } + while (qlen && dump_to_midi(tmp_queue[qhead])) + { + qlen--; + qhead++; + } - pas_write (stat, 0x1B88); /* Acknowledge interrupts */ + restore_flags(flags); + } + if (stat & 0x40) + { + printk("MIDI output overrun %x,%x\n", pas_read(0x1B89), stat); + } + pas_write(stat, 0x1B88); /* Acknowledge interrupts */ } #endif -- cgit v1.2.3