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-rw-r--r--sound/oss/wf_midi.c880
1 files changed, 0 insertions, 880 deletions
diff --git a/sound/oss/wf_midi.c b/sound/oss/wf_midi.c
deleted file mode 100644
index 75c0c143a759..000000000000
--- a/sound/oss/wf_midi.c
+++ /dev/null
@@ -1,880 +0,0 @@
-/*
- * sound/oss/wf_midi.c
- *
- * The low level driver for the WaveFront ICS2115 MIDI interface(s)
- * Note that there is also an MPU-401 emulation (actually, a UART-401
- * emulation) on the CS4232 on the Tropez Plus. This code has nothing
- * to do with that interface at all.
- *
- * The interface is essentially just a UART-401, but is has the
- * interesting property of supporting what Turtle Beach called
- * "Virtual MIDI" mode. In this mode, there are effectively *two*
- * MIDI buses accessible via the interface, one that is routed
- * solely to/from the external WaveFront synthesizer and the other
- * corresponding to the pin/socket connector used to link external
- * MIDI devices to the board.
- *
- * This driver fully supports this mode, allowing two distinct
- * midi devices (/dev/midiNN and /dev/midiNN+1) to be used
- * completely independently, giving 32 channels of MIDI routing,
- * 16 to the WaveFront synth and 16 to the external MIDI bus.
- *
- * Switching between the two is accomplished externally by the driver
- * using the two otherwise unused MIDI bytes. See the code for more details.
- *
- * NOTE: VIRTUAL MIDI MODE IS ON BY DEFAULT (see wavefront.c)
- *
- * The main reason to turn off Virtual MIDI mode is when you want to
- * tightly couple the WaveFront synth with an external MIDI
- * device. You won't be able to distinguish the source of any MIDI
- * data except via SysEx ID, but thats probably OK, since for the most
- * part, the WaveFront won't be sending any MIDI data at all.
- *
- * The main reason to turn on Virtual MIDI Mode is to provide two
- * completely independent 16-channel MIDI buses, one to the
- * WaveFront and one to any external MIDI devices. Given the 32
- * voice nature of the WaveFront, its pretty easy to find a use
- * for all 16 channels driving just that synth.
- *
- */
-
-/*
- * Copyright (C) by Paul Barton-Davis 1998
- * Some portions of this file are derived from work that is:
- *
- * CopyriGht (C) by Hannu Savolainen 1993-1996
- *
- * USS/Lite for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
- * Version 2 (June 1991). See the "COPYING" file distributed with this software
- * for more info.
- */
-
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/spinlock.h>
-#include "sound_config.h"
-
-#include <linux/wavefront.h>
-
-#ifdef MODULE
-
-struct wf_mpu_config {
- int base;
-#define DATAPORT(d) (d)->base
-#define COMDPORT(d) (d)->base+1
-#define STATPORT(d) (d)->base+1
-
- int irq;
- int opened;
- int devno;
- int synthno;
- int mode;
-#define MODE_MIDI 1
-#define MODE_SYNTH 2
-
- void (*inputintr) (int dev, unsigned char data);
- char isvirtual; /* do virtual I/O stuff */
-};
-
-static struct wf_mpu_config devs[2];
-static struct wf_mpu_config *phys_dev = &devs[0];
-static struct wf_mpu_config *virt_dev = &devs[1];
-
-static void start_uart_mode (void);
-static DEFINE_SPINLOCK(lock);
-
-#define OUTPUT_READY 0x40
-#define INPUT_AVAIL 0x80
-#define MPU_ACK 0xFE
-#define UART_MODE_ON 0x3F
-
-static inline int wf_mpu_status (void)
-{
- return inb (STATPORT (phys_dev));
-}
-
-static inline int input_avail (void)
-{
- return !(wf_mpu_status() & INPUT_AVAIL);
-}
-
-static inline int output_ready (void)
-{
- return !(wf_mpu_status() & OUTPUT_READY);
-}
-
-static inline int read_data (void)
-{
- return inb (DATAPORT (phys_dev));
-}
-
-static inline void write_data (unsigned char byte)
-{
- outb (byte, DATAPORT (phys_dev));
-}
-
-/*
- * States for the input scanner (should be in dev_table.h)
- */
-
-#define MST_SYSMSG 100 /* System message (sysx etc). */
-#define MST_MTC 102 /* Midi Time Code (MTC) qframe msg */
-#define MST_SONGSEL 103 /* Song select */
-#define MST_SONGPOS 104 /* Song position pointer */
-#define MST_TIMED 105 /* Leading timing byte rcvd */
-
-/* buffer space check for input scanner */
-
-#define BUFTEST(mi) if (mi->m_ptr >= MI_MAX || mi->m_ptr < 0) \
-{printk(KERN_ERR "WF-MPU: Invalid buffer pointer %d/%d, s=%d\n", \
- mi->m_ptr, mi->m_left, mi->m_state);mi->m_ptr--;}
-
-static unsigned char len_tab[] = /* # of data bytes following a status
- */
-{
- 2, /* 8x */
- 2, /* 9x */
- 2, /* Ax */
- 2, /* Bx */
- 1, /* Cx */
- 1, /* Dx */
- 2, /* Ex */
- 0 /* Fx */
-};
-
-static int
-wf_mpu_input_scanner (int devno, int synthdev, unsigned char midic)
-
-{
- struct midi_input_info *mi = &midi_devs[devno]->in_info;
-
- switch (mi->m_state) {
- case MST_INIT:
- switch (midic) {
- case 0xf8:
- /* Timer overflow */
- break;
-
- case 0xfc:
- break;
-
- case 0xfd:
- /* XXX do something useful with this. If there is
- an external MIDI timer (e.g. a hardware sequencer,
- a useful timer can be derived ...
-
- For now, no timer support.
- */
- break;
-
- case 0xfe:
- return MPU_ACK;
- break;
-
- case 0xf0:
- case 0xf1:
- case 0xf2:
- case 0xf3:
- case 0xf4:
- case 0xf5:
- case 0xf6:
- case 0xf7:
- break;
-
- case 0xf9:
- break;
-
- case 0xff:
- mi->m_state = MST_SYSMSG;
- break;
-
- default:
- if (midic <= 0xef) {
- mi->m_state = MST_TIMED;
- }
- else
- printk (KERN_ERR "<MPU: Unknown event %02x> ",
- midic);
- }
- break;
-
- case MST_TIMED:
- {
- int msg = ((int) (midic & 0xf0) >> 4);
-
- mi->m_state = MST_DATA;
-
- if (msg < 8) { /* Data byte */
-
- msg = ((int) (mi->m_prev_status & 0xf0) >> 4);
- msg -= 8;
- mi->m_left = len_tab[msg] - 1;
-
- mi->m_ptr = 2;
- mi->m_buf[0] = mi->m_prev_status;
- mi->m_buf[1] = midic;
-
- if (mi->m_left <= 0) {
- mi->m_state = MST_INIT;
- do_midi_msg (synthdev, mi->m_buf, mi->m_ptr);
- mi->m_ptr = 0;
- }
- } else if (msg == 0xf) { /* MPU MARK */
-
- mi->m_state = MST_INIT;
-
- switch (midic) {
- case 0xf8:
- break;
-
- case 0xf9:
- break;
-
- case 0xfc:
- break;
-
- default:
- break;
- }
- } else {
- mi->m_prev_status = midic;
- msg -= 8;
- mi->m_left = len_tab[msg];
-
- mi->m_ptr = 1;
- mi->m_buf[0] = midic;
-
- if (mi->m_left <= 0) {
- mi->m_state = MST_INIT;
- do_midi_msg (synthdev, mi->m_buf, mi->m_ptr);
- mi->m_ptr = 0;
- }
- }
- }
- break;
-
- case MST_SYSMSG:
- switch (midic) {
- case 0xf0:
- mi->m_state = MST_SYSEX;
- break;
-
- case 0xf1:
- mi->m_state = MST_MTC;
- break;
-
- case 0xf2:
- mi->m_state = MST_SONGPOS;
- mi->m_ptr = 0;
- break;
-
- case 0xf3:
- mi->m_state = MST_SONGSEL;
- break;
-
- case 0xf6:
- mi->m_state = MST_INIT;
-
- /*
- * Real time messages
- */
- case 0xf8:
- /* midi clock */
- mi->m_state = MST_INIT;
- /* XXX need ext MIDI timer support */
- break;
-
- case 0xfA:
- mi->m_state = MST_INIT;
- /* XXX need ext MIDI timer support */
- break;
-
- case 0xFB:
- mi->m_state = MST_INIT;
- /* XXX need ext MIDI timer support */
- break;
-
- case 0xFC:
- mi->m_state = MST_INIT;
- /* XXX need ext MIDI timer support */
- break;
-
- case 0xFE:
- /* active sensing */
- mi->m_state = MST_INIT;
- break;
-
- case 0xff:
- mi->m_state = MST_INIT;
- break;
-
- default:
- printk (KERN_ERR "unknown MIDI sysmsg %0x\n", midic);
- mi->m_state = MST_INIT;
- }
- break;
-
- case MST_MTC:
- mi->m_state = MST_INIT;
- break;
-
- case MST_SYSEX:
- if (midic == 0xf7) {
- mi->m_state = MST_INIT;
- } else {
- /* XXX fix me */
- }
- break;
-
- case MST_SONGPOS:
- BUFTEST (mi);
- mi->m_buf[mi->m_ptr++] = midic;
- if (mi->m_ptr == 2) {
- mi->m_state = MST_INIT;
- mi->m_ptr = 0;
- /* XXX need ext MIDI timer support */
- }
- break;
-
- case MST_DATA:
- BUFTEST (mi);
- mi->m_buf[mi->m_ptr++] = midic;
- if ((--mi->m_left) <= 0) {
- mi->m_state = MST_INIT;
- do_midi_msg (synthdev, mi->m_buf, mi->m_ptr);
- mi->m_ptr = 0;
- }
- break;
-
- default:
- printk (KERN_ERR "Bad state %d ", mi->m_state);
- mi->m_state = MST_INIT;
- }
-
- return 1;
-}
-
-static irqreturn_t
-wf_mpuintr(int irq, void *dev_id, struct pt_regs *dummy)
-
-{
- struct wf_mpu_config *physical_dev = dev_id;
- static struct wf_mpu_config *input_dev;
- struct midi_input_info *mi = &midi_devs[physical_dev->devno]->in_info;
- int n;
-
- if (!input_avail()) { /* not for us */
- return IRQ_NONE;
- }
-
- if (mi->m_busy)
- return IRQ_HANDLED;
- spin_lock(&lock);
- mi->m_busy = 1;
-
- if (!input_dev) {
- input_dev = physical_dev;
- }
-
- n = 50; /* XXX why ? */
-
- do {
- unsigned char c = read_data ();
-
- if (phys_dev->isvirtual) {
-
- if (c == WF_EXTERNAL_SWITCH) {
- input_dev = virt_dev;
- continue;
- } else if (c == WF_INTERNAL_SWITCH) {
- input_dev = phys_dev;
- continue;
- } /* else just leave it as it is */
-
- } else {
- input_dev = phys_dev;
- }
-
- if (input_dev->mode == MODE_SYNTH) {
-
- wf_mpu_input_scanner (input_dev->devno,
- input_dev->synthno, c);
-
- } else if (input_dev->opened & OPEN_READ) {
-
- if (input_dev->inputintr) {
- input_dev->inputintr (input_dev->devno, c);
- }
- }
-
- } while (input_avail() && n-- > 0);
-
- mi->m_busy = 0;
- spin_unlock(&lock);
- return IRQ_HANDLED;
-}
-
-static int
-wf_mpu_open (int dev, int mode,
- void (*input) (int dev, unsigned char data),
- void (*output) (int dev)
- )
-{
- struct wf_mpu_config *devc;
-
- if (dev < 0 || dev >= num_midis || midi_devs[dev]==NULL)
- return -(ENXIO);
-
- if (phys_dev->devno == dev) {
- devc = phys_dev;
- } else if (phys_dev->isvirtual && virt_dev->devno == 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_MIDI;
- devc->opened = mode;
- devc->synthno = 0;
-
- devc->inputintr = input;
- return 0;
-}
-
-static void
-wf_mpu_close (int dev)
-{
- struct wf_mpu_config *devc;
-
- if (dev < 0 || dev >= num_midis || midi_devs[dev]==NULL)
- return;
-
- if (phys_dev->devno == dev) {
- devc = phys_dev;
- } else if (phys_dev->isvirtual && virt_dev->devno == dev) {
- devc = virt_dev;
- } else {
- printk (KERN_ERR "WF-MPU: unknown device number %d\n", dev);
- return;
- }
-
- devc->mode = 0;
- devc->inputintr = NULL;
- devc->opened = 0;
-}
-
-static int
-wf_mpu_out (int dev, unsigned char midi_byte)
-{
- int timeout;
- unsigned long flags;
- static int lastoutdev = -1;
- unsigned char switchch;
-
- if (phys_dev->isvirtual && lastoutdev != dev) {
-
- if (dev == phys_dev->devno) {
- switchch = WF_INTERNAL_SWITCH;
- } else if (dev == virt_dev->devno) {
- switchch = WF_EXTERNAL_SWITCH;
- } else {
- printk (KERN_ERR "WF-MPU: bad device number %d", dev);
- return (0);
- }
-
- /* XXX fix me */
-
- for (timeout = 30000; timeout > 0 && !output_ready ();
- timeout--);
-
- spin_lock_irqsave(&lock,flags);
-
- if (!output_ready ()) {
- printk (KERN_WARNING "WF-MPU: Send switch "
- "byte timeout\n");
- spin_unlock_irqrestore(&lock,flags);
- return 0;
- }
-
- write_data (switchch);
- spin_unlock_irqrestore(&lock,flags);
- }
-
- lastoutdev = dev;
-
- /*
- * Sometimes it takes about 30000 loops before the output becomes ready
- * (After reset). Normally it takes just about 10 loops.
- */
-
- /* XXX fix me */
-
- for (timeout = 30000; timeout > 0 && !output_ready (); timeout--);
-
- spin_lock_irqsave(&lock,flags);
- if (!output_ready ()) {
- spin_unlock_irqrestore(&lock,flags);
- printk (KERN_WARNING "WF-MPU: Send data timeout\n");
- return 0;
- }
-
- write_data (midi_byte);
- spin_unlock_irqrestore(&lock,flags);
-
- return 1;
-}
-
-static inline int wf_mpu_start_read (int dev) {
- return 0;
-}
-
-static inline int wf_mpu_end_read (int dev) {
- return 0;
-}
-
-static int wf_mpu_ioctl (int dev, unsigned cmd, void __user *arg)
-{
- printk (KERN_WARNING
- "WF-MPU: Intelligent mode not supported by hardware.\n");
- return -(EINVAL);
-}
-
-static int wf_mpu_buffer_status (int dev)
-{
- return 0;
-}
-
-static struct synth_operations wf_mpu_synth_operations[2];
-static struct midi_operations wf_mpu_midi_operations[2];
-
-static struct midi_operations wf_mpu_midi_proto =
-{
- .owner = THIS_MODULE,
- .info = {"WF-MPU MIDI", 0, MIDI_CAP_MPU401, SNDCARD_MPU401},
- .in_info = {0}, /* in_info */
- .open = wf_mpu_open,
- .close = wf_mpu_close,
- .ioctl = wf_mpu_ioctl,
- .outputc = wf_mpu_out,
- .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, IRQF_DISABLED|IRQF_SHARED,
- "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