mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 09:46:53 +07:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
881 lines
18 KiB
C
881 lines
18 KiB
C
/*
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* sound/wf_midi.c
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*
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* The low level driver for the WaveFront ICS2115 MIDI interface(s)
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* Note that there is also an MPU-401 emulation (actually, a UART-401
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* emulation) on the CS4232 on the Tropez Plus. This code has nothing
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* to do with that interface at all.
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*
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* The interface is essentially just a UART-401, but is has the
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* interesting property of supporting what Turtle Beach called
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* "Virtual MIDI" mode. In this mode, there are effectively *two*
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* MIDI buses accessible via the interface, one that is routed
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* solely to/from the external WaveFront synthesizer and the other
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* corresponding to the pin/socket connector used to link external
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* MIDI devices to the board.
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*
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* This driver fully supports this mode, allowing two distinct
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* midi devices (/dev/midiNN and /dev/midiNN+1) to be used
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* completely independently, giving 32 channels of MIDI routing,
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* 16 to the WaveFront synth and 16 to the external MIDI bus.
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*
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* Switching between the two is accomplished externally by the driver
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* using the two otherwise unused MIDI bytes. See the code for more details.
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*
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* NOTE: VIRTUAL MIDI MODE IS ON BY DEFAULT (see wavefront.c)
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*
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* The main reason to turn off Virtual MIDI mode is when you want to
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* tightly couple the WaveFront synth with an external MIDI
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* device. You won't be able to distinguish the source of any MIDI
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* data except via SysEx ID, but thats probably OK, since for the most
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* part, the WaveFront won't be sending any MIDI data at all.
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*
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* The main reason to turn on Virtual MIDI Mode is to provide two
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* completely independent 16-channel MIDI buses, one to the
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* WaveFront and one to any external MIDI devices. Given the 32
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* voice nature of the WaveFront, its pretty easy to find a use
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* for all 16 channels driving just that synth.
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*
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*/
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/*
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* Copyright (C) by Paul Barton-Davis 1998
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* Some portions of this file are derived from work that is:
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*
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* CopyriGht (C) by Hannu Savolainen 1993-1996
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*
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* USS/Lite for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
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* Version 2 (June 1991). See the "COPYING" file distributed with this software
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* for more info.
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*/
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/spinlock.h>
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#include "sound_config.h"
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#include <linux/wavefront.h>
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#ifdef MODULE
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struct wf_mpu_config {
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int base;
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#define DATAPORT(d) (d)->base
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#define COMDPORT(d) (d)->base+1
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#define STATPORT(d) (d)->base+1
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int irq;
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int opened;
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int devno;
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int synthno;
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int mode;
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#define MODE_MIDI 1
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#define MODE_SYNTH 2
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void (*inputintr) (int dev, unsigned char data);
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char isvirtual; /* do virtual I/O stuff */
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};
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static struct wf_mpu_config devs[2];
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static struct wf_mpu_config *phys_dev = &devs[0];
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static struct wf_mpu_config *virt_dev = &devs[1];
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static void start_uart_mode (void);
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static DEFINE_SPINLOCK(lock);
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#define OUTPUT_READY 0x40
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#define INPUT_AVAIL 0x80
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#define MPU_ACK 0xFE
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#define UART_MODE_ON 0x3F
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static inline int wf_mpu_status (void)
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{
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return inb (STATPORT (phys_dev));
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}
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static inline int input_avail (void)
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{
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return !(wf_mpu_status() & INPUT_AVAIL);
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}
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static inline int output_ready (void)
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{
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return !(wf_mpu_status() & OUTPUT_READY);
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}
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static inline int read_data (void)
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{
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return inb (DATAPORT (phys_dev));
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}
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static inline void write_data (unsigned char byte)
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{
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outb (byte, DATAPORT (phys_dev));
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}
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/*
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* States for the input scanner (should be in dev_table.h)
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*/
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#define MST_SYSMSG 100 /* System message (sysx etc). */
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#define MST_MTC 102 /* Midi Time Code (MTC) qframe msg */
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#define MST_SONGSEL 103 /* Song select */
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#define MST_SONGPOS 104 /* Song position pointer */
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#define MST_TIMED 105 /* Leading timing byte rcvd */
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/* buffer space check for input scanner */
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#define BUFTEST(mi) if (mi->m_ptr >= MI_MAX || mi->m_ptr < 0) \
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{printk(KERN_ERR "WF-MPU: Invalid buffer pointer %d/%d, s=%d\n", \
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mi->m_ptr, mi->m_left, mi->m_state);mi->m_ptr--;}
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static unsigned char len_tab[] = /* # of data bytes following a status
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*/
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{
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2, /* 8x */
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2, /* 9x */
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2, /* Ax */
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2, /* Bx */
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1, /* Cx */
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1, /* Dx */
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2, /* Ex */
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0 /* Fx */
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};
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static int
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wf_mpu_input_scanner (int devno, int synthdev, unsigned char midic)
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{
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struct midi_input_info *mi = &midi_devs[devno]->in_info;
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switch (mi->m_state) {
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case MST_INIT:
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switch (midic) {
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case 0xf8:
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/* Timer overflow */
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break;
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case 0xfc:
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break;
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case 0xfd:
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/* XXX do something useful with this. If there is
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an external MIDI timer (e.g. a hardware sequencer,
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a useful timer can be derived ...
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For now, no timer support.
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*/
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break;
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case 0xfe:
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return MPU_ACK;
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break;
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case 0xf0:
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case 0xf1:
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case 0xf2:
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case 0xf3:
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case 0xf4:
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case 0xf5:
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case 0xf6:
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case 0xf7:
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break;
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case 0xf9:
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break;
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case 0xff:
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mi->m_state = MST_SYSMSG;
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break;
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default:
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if (midic <= 0xef) {
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mi->m_state = MST_TIMED;
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}
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else
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printk (KERN_ERR "<MPU: Unknown event %02x> ",
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midic);
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}
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break;
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case MST_TIMED:
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{
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int msg = ((int) (midic & 0xf0) >> 4);
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mi->m_state = MST_DATA;
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if (msg < 8) { /* Data byte */
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msg = ((int) (mi->m_prev_status & 0xf0) >> 4);
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msg -= 8;
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mi->m_left = len_tab[msg] - 1;
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mi->m_ptr = 2;
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mi->m_buf[0] = mi->m_prev_status;
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mi->m_buf[1] = midic;
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if (mi->m_left <= 0) {
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mi->m_state = MST_INIT;
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do_midi_msg (synthdev, mi->m_buf, mi->m_ptr);
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mi->m_ptr = 0;
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}
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} else if (msg == 0xf) { /* MPU MARK */
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mi->m_state = MST_INIT;
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switch (midic) {
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case 0xf8:
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break;
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case 0xf9:
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break;
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case 0xfc:
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break;
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default:
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break;
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}
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} else {
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mi->m_prev_status = midic;
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msg -= 8;
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mi->m_left = len_tab[msg];
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mi->m_ptr = 1;
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mi->m_buf[0] = midic;
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if (mi->m_left <= 0) {
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mi->m_state = MST_INIT;
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do_midi_msg (synthdev, mi->m_buf, mi->m_ptr);
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mi->m_ptr = 0;
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}
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}
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}
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break;
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case MST_SYSMSG:
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switch (midic) {
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case 0xf0:
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mi->m_state = MST_SYSEX;
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break;
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case 0xf1:
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mi->m_state = MST_MTC;
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break;
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case 0xf2:
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mi->m_state = MST_SONGPOS;
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mi->m_ptr = 0;
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break;
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case 0xf3:
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mi->m_state = MST_SONGSEL;
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break;
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case 0xf6:
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mi->m_state = MST_INIT;
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/*
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* Real time messages
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*/
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case 0xf8:
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/* midi clock */
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mi->m_state = MST_INIT;
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/* XXX need ext MIDI timer support */
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break;
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case 0xfA:
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mi->m_state = MST_INIT;
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/* XXX need ext MIDI timer support */
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break;
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case 0xFB:
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mi->m_state = MST_INIT;
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/* XXX need ext MIDI timer support */
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break;
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case 0xFC:
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mi->m_state = MST_INIT;
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/* XXX need ext MIDI timer support */
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break;
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case 0xFE:
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/* active sensing */
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mi->m_state = MST_INIT;
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break;
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case 0xff:
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mi->m_state = MST_INIT;
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break;
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default:
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printk (KERN_ERR "unknown MIDI sysmsg %0x\n", midic);
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mi->m_state = MST_INIT;
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}
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break;
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case MST_MTC:
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mi->m_state = MST_INIT;
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break;
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case MST_SYSEX:
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if (midic == 0xf7) {
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mi->m_state = MST_INIT;
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} else {
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/* XXX fix me */
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}
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break;
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case MST_SONGPOS:
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BUFTEST (mi);
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mi->m_buf[mi->m_ptr++] = midic;
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if (mi->m_ptr == 2) {
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mi->m_state = MST_INIT;
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mi->m_ptr = 0;
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/* XXX need ext MIDI timer support */
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}
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break;
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case MST_DATA:
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BUFTEST (mi);
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mi->m_buf[mi->m_ptr++] = midic;
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if ((--mi->m_left) <= 0) {
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mi->m_state = MST_INIT;
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do_midi_msg (synthdev, mi->m_buf, mi->m_ptr);
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mi->m_ptr = 0;
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}
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break;
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default:
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printk (KERN_ERR "Bad state %d ", mi->m_state);
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mi->m_state = MST_INIT;
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}
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return 1;
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}
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static irqreturn_t
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wf_mpuintr(int irq, void *dev_id, struct pt_regs *dummy)
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{
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struct wf_mpu_config *physical_dev = dev_id;
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static struct wf_mpu_config *input_dev;
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struct midi_input_info *mi = &midi_devs[physical_dev->devno]->in_info;
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int n;
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if (!input_avail()) { /* not for us */
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return IRQ_NONE;
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}
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if (mi->m_busy)
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return IRQ_HANDLED;
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spin_lock(&lock);
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mi->m_busy = 1;
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if (!input_dev) {
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input_dev = physical_dev;
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}
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n = 50; /* XXX why ? */
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do {
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unsigned char c = read_data ();
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if (phys_dev->isvirtual) {
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if (c == WF_EXTERNAL_SWITCH) {
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input_dev = virt_dev;
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continue;
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} else if (c == WF_INTERNAL_SWITCH) {
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input_dev = phys_dev;
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continue;
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} /* else just leave it as it is */
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} else {
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input_dev = phys_dev;
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}
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if (input_dev->mode == MODE_SYNTH) {
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wf_mpu_input_scanner (input_dev->devno,
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input_dev->synthno, c);
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} else if (input_dev->opened & OPEN_READ) {
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if (input_dev->inputintr) {
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input_dev->inputintr (input_dev->devno, c);
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}
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}
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} while (input_avail() && n-- > 0);
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mi->m_busy = 0;
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spin_unlock(&lock);
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return IRQ_HANDLED;
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}
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static int
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wf_mpu_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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struct wf_mpu_config *devc;
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if (dev < 0 || dev >= num_midis || midi_devs[dev]==NULL)
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return -(ENXIO);
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if (phys_dev->devno == dev) {
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devc = phys_dev;
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} else if (phys_dev->isvirtual && virt_dev->devno == dev) {
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devc = virt_dev;
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} else {
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printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
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return -(EINVAL);
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}
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if (devc->opened) {
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return -(EBUSY);
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}
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devc->mode = MODE_MIDI;
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devc->opened = mode;
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devc->synthno = 0;
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devc->inputintr = input;
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return 0;
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}
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static void
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wf_mpu_close (int dev)
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{
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struct wf_mpu_config *devc;
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if (dev < 0 || dev >= num_midis || midi_devs[dev]==NULL)
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return;
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if (phys_dev->devno == dev) {
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devc = phys_dev;
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} else if (phys_dev->isvirtual && virt_dev->devno == dev) {
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devc = virt_dev;
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} else {
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printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
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return;
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}
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devc->mode = 0;
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devc->inputintr = NULL;
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devc->opened = 0;
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}
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static int
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wf_mpu_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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static int lastoutdev = -1;
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unsigned char switchch;
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if (phys_dev->isvirtual && lastoutdev != dev) {
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if (dev == phys_dev->devno) {
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switchch = WF_INTERNAL_SWITCH;
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} else if (dev == virt_dev->devno) {
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switchch = WF_EXTERNAL_SWITCH;
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} else {
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printk (KERN_ERR "WF-MPU: bad device number %d", dev);
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return (0);
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}
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/* XXX fix me */
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for (timeout = 30000; timeout > 0 && !output_ready ();
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timeout--);
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spin_lock_irqsave(&lock,flags);
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if (!output_ready ()) {
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printk (KERN_WARNING "WF-MPU: Send switch "
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"byte timeout\n");
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spin_unlock_irqrestore(&lock,flags);
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return 0;
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}
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write_data (switchch);
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spin_unlock_irqrestore(&lock,flags);
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}
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lastoutdev = dev;
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/*
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* Sometimes it takes about 30000 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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/* XXX fix me */
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for (timeout = 30000; timeout > 0 && !output_ready (); timeout--);
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spin_lock_irqsave(&lock,flags);
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if (!output_ready ()) {
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spin_unlock_irqrestore(&lock,flags);
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printk (KERN_WARNING "WF-MPU: Send data timeout\n");
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return 0;
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}
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write_data (midi_byte);
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spin_unlock_irqrestore(&lock,flags);
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return 1;
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}
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static inline int wf_mpu_start_read (int dev) {
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return 0;
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}
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static inline int wf_mpu_end_read (int dev) {
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return 0;
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}
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static int wf_mpu_ioctl (int dev, unsigned cmd, void __user *arg)
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{
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printk (KERN_WARNING
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"WF-MPU: Intelligent mode not supported by hardware.\n");
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return -(EINVAL);
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}
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static int wf_mpu_buffer_status (int dev)
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{
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return 0;
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}
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static struct synth_operations wf_mpu_synth_operations[2];
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static struct midi_operations wf_mpu_midi_operations[2];
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static struct midi_operations wf_mpu_midi_proto =
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{
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.owner = THIS_MODULE,
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.info = {"WF-MPU MIDI", 0, MIDI_CAP_MPU401, SNDCARD_MPU401},
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.in_info = {0}, /* in_info */
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.open = wf_mpu_open,
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.close = wf_mpu_close,
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.ioctl = wf_mpu_ioctl,
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.outputc = wf_mpu_out,
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.start_read = wf_mpu_start_read,
|
|
.end_read = wf_mpu_end_read,
|
|
.buffer_status = wf_mpu_buffer_status,
|
|
};
|
|
|
|
static struct synth_info wf_mpu_synth_info_proto =
|
|
{"WaveFront MPU-401 interface", 0,
|
|
SYNTH_TYPE_MIDI, MIDI_TYPE_MPU401, 0, 128, 0, 128, SYNTH_CAP_INPUT};
|
|
|
|
static struct synth_info wf_mpu_synth_info[2];
|
|
|
|
static int
|
|
wf_mpu_synth_ioctl (int dev, unsigned int cmd, void __user *arg)
|
|
{
|
|
int midi_dev;
|
|
int index;
|
|
|
|
midi_dev = synth_devs[dev]->midi_dev;
|
|
|
|
if (midi_dev < 0 || midi_dev > num_midis || midi_devs[midi_dev]==NULL)
|
|
return -(ENXIO);
|
|
|
|
if (midi_dev == phys_dev->devno) {
|
|
index = 0;
|
|
} else if (phys_dev->isvirtual && midi_dev == virt_dev->devno) {
|
|
index = 1;
|
|
} else {
|
|
return -(EINVAL);
|
|
}
|
|
|
|
switch (cmd) {
|
|
|
|
case SNDCTL_SYNTH_INFO:
|
|
if (copy_to_user(arg,
|
|
&wf_mpu_synth_info[index],
|
|
sizeof (struct synth_info)))
|
|
return -EFAULT;
|
|
return 0;
|
|
|
|
case SNDCTL_SYNTH_MEMAVL:
|
|
return 0x7fffffff;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int
|
|
wf_mpu_synth_open (int dev, int mode)
|
|
{
|
|
int midi_dev;
|
|
struct wf_mpu_config *devc;
|
|
|
|
midi_dev = synth_devs[dev]->midi_dev;
|
|
|
|
if (midi_dev < 0 || midi_dev > num_midis || midi_devs[midi_dev]==NULL) {
|
|
return -(ENXIO);
|
|
}
|
|
|
|
if (phys_dev->devno == midi_dev) {
|
|
devc = phys_dev;
|
|
} else if (phys_dev->isvirtual && virt_dev->devno == midi_dev) {
|
|
devc = virt_dev;
|
|
} else {
|
|
printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
|
|
return -(EINVAL);
|
|
}
|
|
|
|
if (devc->opened) {
|
|
return -(EBUSY);
|
|
}
|
|
|
|
devc->mode = MODE_SYNTH;
|
|
devc->synthno = dev;
|
|
devc->opened = mode;
|
|
devc->inputintr = NULL;
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
wf_mpu_synth_close (int dev)
|
|
{
|
|
int midi_dev;
|
|
struct wf_mpu_config *devc;
|
|
|
|
midi_dev = synth_devs[dev]->midi_dev;
|
|
|
|
if (phys_dev->devno == midi_dev) {
|
|
devc = phys_dev;
|
|
} else if (phys_dev->isvirtual && virt_dev->devno == midi_dev) {
|
|
devc = virt_dev;
|
|
} else {
|
|
printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
|
|
return;
|
|
}
|
|
|
|
devc->inputintr = NULL;
|
|
devc->opened = 0;
|
|
devc->mode = 0;
|
|
}
|
|
|
|
#define _MIDI_SYNTH_C_
|
|
#define MIDI_SYNTH_NAME "WaveFront (MIDI)"
|
|
#define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT
|
|
#include "midi_synth.h"
|
|
|
|
static struct synth_operations wf_mpu_synth_proto =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.id = "WaveFront (ICS2115)",
|
|
.info = NULL, /* info field, filled in during configuration */
|
|
.midi_dev = 0, /* MIDI dev XXX should this be -1 ? */
|
|
.synth_type = SYNTH_TYPE_MIDI,
|
|
.synth_subtype = SAMPLE_TYPE_WAVEFRONT,
|
|
.open = wf_mpu_synth_open,
|
|
.close = wf_mpu_synth_close,
|
|
.ioctl = wf_mpu_synth_ioctl,
|
|
.kill_note = midi_synth_kill_note,
|
|
.start_note = midi_synth_start_note,
|
|
.set_instr = midi_synth_set_instr,
|
|
.reset = midi_synth_reset,
|
|
.hw_control = midi_synth_hw_control,
|
|
.load_patch = midi_synth_load_patch,
|
|
.aftertouch = midi_synth_aftertouch,
|
|
.controller = midi_synth_controller,
|
|
.panning = midi_synth_panning,
|
|
.bender = midi_synth_bender,
|
|
.setup_voice = midi_synth_setup_voice,
|
|
.send_sysex = midi_synth_send_sysex
|
|
};
|
|
|
|
static int
|
|
config_wf_mpu (struct wf_mpu_config *dev)
|
|
|
|
{
|
|
int is_external;
|
|
char *name;
|
|
int index;
|
|
|
|
if (dev == phys_dev) {
|
|
name = "WaveFront internal MIDI";
|
|
is_external = 0;
|
|
index = 0;
|
|
memcpy ((char *) &wf_mpu_synth_operations[index],
|
|
(char *) &wf_mpu_synth_proto,
|
|
sizeof (struct synth_operations));
|
|
} else {
|
|
name = "WaveFront external MIDI";
|
|
is_external = 1;
|
|
index = 1;
|
|
/* no synth operations for an external MIDI interface */
|
|
}
|
|
|
|
memcpy ((char *) &wf_mpu_synth_info[dev->devno],
|
|
(char *) &wf_mpu_synth_info_proto,
|
|
sizeof (struct synth_info));
|
|
|
|
strcpy (wf_mpu_synth_info[index].name, name);
|
|
|
|
wf_mpu_synth_operations[index].midi_dev = dev->devno;
|
|
wf_mpu_synth_operations[index].info = &wf_mpu_synth_info[index];
|
|
|
|
memcpy ((char *) &wf_mpu_midi_operations[index],
|
|
(char *) &wf_mpu_midi_proto,
|
|
sizeof (struct midi_operations));
|
|
|
|
if (is_external) {
|
|
wf_mpu_midi_operations[index].converter = NULL;
|
|
} else {
|
|
wf_mpu_midi_operations[index].converter =
|
|
&wf_mpu_synth_operations[index];
|
|
}
|
|
|
|
strcpy (wf_mpu_midi_operations[index].info.name, name);
|
|
|
|
midi_devs[dev->devno] = &wf_mpu_midi_operations[index];
|
|
midi_devs[dev->devno]->in_info.m_busy = 0;
|
|
midi_devs[dev->devno]->in_info.m_state = MST_INIT;
|
|
midi_devs[dev->devno]->in_info.m_ptr = 0;
|
|
midi_devs[dev->devno]->in_info.m_left = 0;
|
|
midi_devs[dev->devno]->in_info.m_prev_status = 0;
|
|
|
|
devs[index].opened = 0;
|
|
devs[index].mode = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int virtual_midi_enable (void)
|
|
|
|
{
|
|
if ((virt_dev->devno < 0) &&
|
|
(virt_dev->devno = sound_alloc_mididev()) == -1) {
|
|
printk (KERN_ERR
|
|
"WF-MPU: too many midi devices detected\n");
|
|
return -1;
|
|
}
|
|
|
|
config_wf_mpu (virt_dev);
|
|
|
|
phys_dev->isvirtual = 1;
|
|
return virt_dev->devno;
|
|
}
|
|
|
|
int
|
|
virtual_midi_disable (void)
|
|
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&lock,flags);
|
|
|
|
wf_mpu_close (virt_dev->devno);
|
|
/* no synth on virt_dev, so no need to call wf_mpu_synth_close() */
|
|
phys_dev->isvirtual = 0;
|
|
|
|
spin_unlock_irqrestore(&lock,flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int __init detect_wf_mpu (int irq, int io_base)
|
|
{
|
|
if (!request_region(io_base, 2, "wavefront midi")) {
|
|
printk (KERN_WARNING "WF-MPU: I/O port %x already in use.\n",
|
|
io_base);
|
|
return -1;
|
|
}
|
|
|
|
phys_dev->base = io_base;
|
|
phys_dev->irq = irq;
|
|
phys_dev->devno = -1;
|
|
virt_dev->devno = -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int __init install_wf_mpu (void)
|
|
{
|
|
if ((phys_dev->devno = sound_alloc_mididev()) < 0){
|
|
|
|
printk (KERN_ERR "WF-MPU: Too many MIDI devices detected.\n");
|
|
release_region(phys_dev->base, 2);
|
|
return -1;
|
|
}
|
|
|
|
phys_dev->isvirtual = 0;
|
|
|
|
if (config_wf_mpu (phys_dev)) {
|
|
|
|
printk (KERN_WARNING
|
|
"WF-MPU: configuration for MIDI device %d failed\n",
|
|
phys_dev->devno);
|
|
sound_unload_mididev (phys_dev->devno);
|
|
|
|
}
|
|
|
|
/* OK, now we're configured to handle an interrupt ... */
|
|
|
|
if (request_irq (phys_dev->irq, wf_mpuintr, SA_INTERRUPT|SA_SHIRQ,
|
|
"wavefront midi", phys_dev) < 0) {
|
|
|
|
printk (KERN_ERR "WF-MPU: Failed to allocate IRQ%d\n",
|
|
phys_dev->irq);
|
|
return -1;
|
|
|
|
}
|
|
|
|
/* This being a WaveFront (ICS-2115) emulated MPU-401, we have
|
|
to switch it into UART (dumb) mode, because otherwise, it
|
|
won't do anything at all.
|
|
*/
|
|
|
|
start_uart_mode ();
|
|
|
|
return phys_dev->devno;
|
|
}
|
|
|
|
void
|
|
uninstall_wf_mpu (void)
|
|
|
|
{
|
|
release_region (phys_dev->base, 2);
|
|
free_irq (phys_dev->irq, phys_dev);
|
|
sound_unload_mididev (phys_dev->devno);
|
|
|
|
if (virt_dev->devno >= 0) {
|
|
sound_unload_mididev (virt_dev->devno);
|
|
}
|
|
}
|
|
|
|
static void
|
|
start_uart_mode (void)
|
|
|
|
{
|
|
int ok, i;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&lock,flags);
|
|
|
|
/* XXX fix me */
|
|
|
|
for (i = 0; i < 30000 && !output_ready (); i++);
|
|
|
|
outb (UART_MODE_ON, COMDPORT(phys_dev));
|
|
|
|
for (ok = 0, i = 50000; i > 0 && !ok; i--) {
|
|
if (input_avail ()) {
|
|
if (read_data () == MPU_ACK) {
|
|
ok = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&lock,flags);
|
|
}
|
|
#endif
|