ae28ee13b4
Amancio. There is some SoundSource support here that is primitive and probably doesn't work, but I'll let the two submitters let me know how my integration of that was since I don't have this card to test. I've only tested this on my GUS MAX since it's all I have. This all probably needs to be re-done anyway since we're widely variant from the original VOXWARE source in the current layout. Submitted by: Amancio Hasty and Jim Lowe Obtained from: Hannu Savolainen
328 lines
6.8 KiB
C
328 lines
6.8 KiB
C
/*
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* sound/uart6850.c
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*
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* Copyright by Hannu Savolainen 1993
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*
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* Mon Nov 22 22:38:35 MET 1993 marco@driq.home.usn.nl:
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* added 6850 support, used with COVOX SoundMaster II and custom cards.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer. 2.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include "sound_config.h"
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#ifdef CONFIGURE_SOUNDCARD
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#if !defined(EXCLUDE_UART6850) && !defined(EXCLUDE_MIDI)
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#define DATAPORT (uart6850_base) /*
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* * * Midi6850 Data I/O Port on IBM
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* */
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#define COMDPORT (uart6850_base+1) /*
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* * * Midi6850 Command Port on IBM */
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#define STATPORT (uart6850_base+1) /*
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* * * Midi6850 Status Port on IBM */
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#define uart6850_status() INB(STATPORT)
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#define input_avail() ((uart6850_status()&INPUT_AVAIL))
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#define output_ready() ((uart6850_status()&OUTPUT_READY))
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#define uart6850_cmd(cmd) OUTB(cmd, COMDPORT)
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#define uart6850_read() INB(DATAPORT)
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#define uart6850_write(byte) OUTB(byte, DATAPORT)
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#define OUTPUT_READY 0x02 /*
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* * * Mask for Data Read Ready Bit */
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#define INPUT_AVAIL 0x01 /*
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* * * Mask for Data Send Ready Bit */
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#define UART_RESET 0x95 /*
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* * * 6850 Total Reset Command */
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#define UART_MODE_ON 0x03 /*
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* * * 6850 Send/Receive UART Mode */
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static int uart6850_opened = 0;
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static int uart6850_base = 0x330;
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static int uart6850_irq;
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static int uart6850_detected = 0;
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static int my_dev;
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static int reset_uart6850 (void);
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static void (*midi_input_intr) (int dev, unsigned char data);
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static void
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uart6850_input_loop (void)
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{
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int count;
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count = 10;
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while (count) /*
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* Not timed out
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*/
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if (input_avail ())
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{
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unsigned char c = uart6850_read ();
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count = 100;
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if (uart6850_opened & OPEN_READ)
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midi_input_intr (my_dev, c);
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}
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else
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while (!input_avail () && count)
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count--;
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}
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void
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m6850intr (INTR_HANDLER_PARMS (irq, dummy))
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{
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if (input_avail ())
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uart6850_input_loop ();
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}
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/*
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* It looks like there is no input interrupts in the UART mode. Let's try
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* polling.
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*/
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static void
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poll_uart6850 (unsigned long dummy)
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{
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unsigned long flags;
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DEFINE_TIMER (uart6850_timer, poll_uart6850);
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if (!(uart6850_opened & OPEN_READ))
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return; /*
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* No longer required
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*/
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DISABLE_INTR (flags);
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if (input_avail ())
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uart6850_input_loop ();
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ACTIVATE_TIMER (uart6850_timer, poll_uart6850, 1); /*
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* Come back later
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*/
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RESTORE_INTR (flags);
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}
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static int
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uart6850_open (int dev, int mode,
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void (*input) (int dev, unsigned char data),
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void (*output) (int dev)
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)
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{
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if (uart6850_opened)
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{
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printk ("Midi6850: Midi busy\n");
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return RET_ERROR (EBUSY);
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}
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uart6850_cmd (UART_RESET);
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uart6850_input_loop ();
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midi_input_intr = input;
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uart6850_opened = mode;
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poll_uart6850 (0); /*
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* Enable input polling
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*/
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return 0;
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}
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static void
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uart6850_close (int dev)
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{
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uart6850_cmd (UART_MODE_ON);
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uart6850_opened = 0;
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}
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static int
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uart6850_out (int dev, unsigned char midi_byte)
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{
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int timeout;
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unsigned long flags;
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/*
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* Test for input since pending input seems to block the output.
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*/
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DISABLE_INTR (flags);
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if (input_avail ())
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uart6850_input_loop ();
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RESTORE_INTR (flags);
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/*
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* Sometimes it takes about 13000 loops before the output becomes ready
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* (After reset). Normally it takes just about 10 loops.
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*/
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for (timeout = 30000; timeout > 0 && !output_ready (); timeout--); /*
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* Wait
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*/
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if (!output_ready ())
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{
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printk ("Midi6850: Timeout\n");
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return 0;
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}
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uart6850_write (midi_byte);
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return 1;
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}
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static int
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uart6850_command (int dev, unsigned char *midi_byte)
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{
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return 1;
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}
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static int
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uart6850_start_read (int dev)
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{
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return 0;
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}
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static int
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uart6850_end_read (int dev)
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{
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return 0;
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}
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static int
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uart6850_ioctl (int dev, unsigned cmd, unsigned arg)
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{
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return RET_ERROR (EINVAL);
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}
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static void
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uart6850_kick (int dev)
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{
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}
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static int
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uart6850_buffer_status (int dev)
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{
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return 0; /*
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* No data in buffers
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*/
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}
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#define MIDI_SYNTH_NAME "6850 UART Midi"
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#define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT
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#include "midi_synth.h"
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static struct midi_operations uart6850_operations =
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{
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{"6850 UART", 0, 0, SNDCARD_UART6850},
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&std_midi_synth,
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{0},
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uart6850_open,
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uart6850_close,
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uart6850_ioctl,
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uart6850_out,
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uart6850_start_read,
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uart6850_end_read,
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uart6850_kick,
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uart6850_command,
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uart6850_buffer_status
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};
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long
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attach_uart6850 (long mem_start, struct address_info *hw_config)
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{
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int ok, timeout;
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unsigned long flags;
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if (num_midis >= MAX_MIDI_DEV)
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{
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printk ("Sound: Too many midi devices detected\n");
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return mem_start;
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}
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uart6850_base = hw_config->io_base;
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uart6850_irq = hw_config->irq;
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if (!uart6850_detected)
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return RET_ERROR (EIO);
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DISABLE_INTR (flags);
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for (timeout = 30000; timeout < 0 && !output_ready (); timeout--); /*
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* Wait
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*/
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uart6850_cmd (UART_MODE_ON);
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ok = 1;
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RESTORE_INTR (flags);
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#if defined(__FreeBSD__)
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printk ("uart0: <6850 Midi Interface>");
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#else
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printk (" <6850 Midi Interface>");
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#endif
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std_midi_synth.midi_dev = my_dev = num_midis;
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midi_devs[num_midis++] = &uart6850_operations;
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return mem_start;
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}
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static int
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reset_uart6850 (void)
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{
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uart6850_read ();
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return 1; /*
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* OK
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*/
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}
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int
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probe_uart6850 (struct address_info *hw_config)
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{
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int ok = 0;
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uart6850_base = hw_config->io_base;
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uart6850_irq = hw_config->irq;
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if (snd_set_irq_handler (uart6850_irq, m6850intr, "MIDI6850") < 0)
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return 0;
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ok = reset_uart6850 ();
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uart6850_detected = ok;
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return ok;
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}
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#endif
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#endif
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