Quelle  gus_main.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Routines for Gravis UltraSound soundcards
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 */

#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/gus.h>
#include <sound/control.h>

#include <asm/dma.h>

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Routines for Gravis UltraSound soundcards");
MODULE_LICENSE("GPL");

static int snd_gus_init_dma_irq(struct snd_gus_card * gus, int latches);

static int snd_gus_joystick_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 uinfo->count = 1;
 uinfo->value.integer.min = 0;
 uinfo->value.integer.max = 31;
 return 0;
}

static int snd_gus_joystick_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
 struct snd_gus_card *gus = snd_kcontrol_chip(kcontrol);
 
 ucontrol->value.integer.value[0] = gus->joystick_dac & 31;
 return 0;
}

static int snd_gus_joystick_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
 struct snd_gus_card *gus = snd_kcontrol_chip(kcontrol);
 unsigned long flags;
 int change;
 unsigned char nval;
 
 nval = ucontrol->value.integer.value[0] & 31;
 spin_lock_irqsave(&gus->reg_lock, flags);
 change = gus->joystick_dac != nval;
 gus->joystick_dac = nval;
 snd_gf1_write8(gus, SNDRV_GF1_GB_JOYSTICK_DAC_LEVEL, gus->joystick_dac);
 spin_unlock_irqrestore(&gus->reg_lock, flags);
 return change;
}

static const struct snd_kcontrol_new snd_gus_joystick_control = {
 .iface = SNDRV_CTL_ELEM_IFACE_CARD,
 .name = "Joystick Speed",
 .info = snd_gus_joystick_info,
 .get = snd_gus_joystick_get,
 .put = snd_gus_joystick_put
};

static void snd_gus_init_control(struct snd_gus_card *gus)
{
 if (!gus->ace_flag)
  snd_ctl_add(gus->card, snd_ctl_new1(&snd_gus_joystick_control, gus));
}

/*
 *
 */

static int snd_gus_free(struct snd_gus_card *gus)
{
 if (gus->gf1.res_port2 == NULL)
  goto __hw_end;
 snd_gf1_stop(gus);
 snd_gus_init_dma_irq(gus, 0);
      __hw_end:
 release_and_free_resource(gus->gf1.res_port1);
 release_and_free_resource(gus->gf1.res_port2);
 if (gus->gf1.irq >= 0)
  free_irq(gus->gf1.irq, (void *) gus);
 if (gus->gf1.dma1 >= 0) {
  disable_dma(gus->gf1.dma1);
  free_dma(gus->gf1.dma1);
 }
 if (!gus->equal_dma && gus->gf1.dma2 >= 0) {
  disable_dma(gus->gf1.dma2);
  free_dma(gus->gf1.dma2);
 }
 kfree(gus);
 return 0;
}

static int snd_gus_dev_free(struct snd_device *device)
{
 struct snd_gus_card *gus = device->device_data;
 return snd_gus_free(gus);
}

int snd_gus_create(struct snd_card *card,
     unsigned long port,
     int irq, int dma1, int dma2,
     int timer_dev,
     int voices,
     int pcm_channels,
     int effect,
     struct snd_gus_card **rgus)
{
 struct snd_gus_card *gus;
 int err;
 static const struct snd_device_ops ops = {
  .dev_free = snd_gus_dev_free,
 };

 *rgus = NULL;
 gus = kzalloc(sizeof(*gus), GFP_KERNEL);
 if (gus == NULL)
  return -ENOMEM;
 spin_lock_init(&gus->reg_lock);
 spin_lock_init(&gus->voice_alloc);
 spin_lock_init(&gus->active_voice_lock);
 spin_lock_init(&gus->event_lock);
 spin_lock_init(&gus->dma_lock);
 spin_lock_init(&gus->pcm_volume_level_lock);
 spin_lock_init(&gus->uart_cmd_lock);
 mutex_init(&gus->dma_mutex);
 gus->gf1.irq = -1;
 gus->gf1.dma1 = -1;
 gus->gf1.dma2 = -1;
 gus->card = card;
 gus->gf1.port = port;
 /* fill register variables for speedup */
 gus->gf1.reg_page = GUSP(gus, GF1PAGE);
 gus->gf1.reg_regsel = GUSP(gus, GF1REGSEL);
 gus->gf1.reg_data8 = GUSP(gus, GF1DATAHIGH);
 gus->gf1.reg_data16 = GUSP(gus, GF1DATALOW);
 gus->gf1.reg_irqstat = GUSP(gus, IRQSTAT);
 gus->gf1.reg_dram = GUSP(gus, DRAM);
 gus->gf1.reg_timerctrl = GUSP(gus, TIMERCNTRL);
 gus->gf1.reg_timerdata = GUSP(gus, TIMERDATA);
 /* allocate resources */
 gus->gf1.res_port1 = request_region(port, 16, "GUS GF1 (Adlib/SB)");
 if (!gus->gf1.res_port1) {
  dev_err(card->dev, "gus: can't grab SB port 0x%lx\n", port);
  snd_gus_free(gus);
  return -EBUSY;
 }
 gus->gf1.res_port2 = request_region(port + 0x100, 12, "GUS GF1 (Synth)");
 if (!gus->gf1.res_port2) {
  dev_err(card->dev, "gus: can't grab synth port 0x%lx\n", port + 0x100);
  snd_gus_free(gus);
  return -EBUSY;
 }
 if (irq >= 0 && request_irq(irq, snd_gus_interrupt, 0, "GUS GF1", (void *) gus)) {
  dev_err(card->dev, "gus: can't grab irq %d\n", irq);
  snd_gus_free(gus);
  return -EBUSY;
 }
 gus->gf1.irq = irq;
 card->sync_irq = irq;
 if (request_dma(dma1, "GUS - 1")) {
  dev_err(card->dev, "gus: can't grab DMA1 %d\n", dma1);
  snd_gus_free(gus);
  return -EBUSY;
 }
 gus->gf1.dma1 = dma1;
 if (dma2 >= 0 && dma1 != dma2) {
  if (request_dma(dma2, "GUS - 2")) {
   dev_err(card->dev, "gus: can't grab DMA2 %d\n", dma2);
   snd_gus_free(gus);
   return -EBUSY;
  }
  gus->gf1.dma2 = dma2;
 } else {
  gus->gf1.dma2 = gus->gf1.dma1;
  gus->equal_dma = 1;
 }
 gus->timer_dev = timer_dev;
 if (voices < 14)
  voices = 14;
 if (voices > 32)
  voices = 32;
 if (pcm_channels < 0)
  pcm_channels = 0;
 if (pcm_channels > 8)
  pcm_channels = 8;
 pcm_channels++;
 pcm_channels &= ~1;
 gus->gf1.effect = effect ? 1 : 0;
 gus->gf1.active_voices = voices;
 gus->gf1.pcm_channels = pcm_channels;
 gus->gf1.volume_ramp = 25;
 gus->gf1.smooth_pan = 1;
 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, gus, &ops);
 if (err < 0) {
  snd_gus_free(gus);
  return err;
 }
 *rgus = gus;
 return 0;
}

/*
 *  Memory detection routine for plain GF1 soundcards
 */

static int snd_gus_detect_memory(struct snd_gus_card * gus)
{
 int l, idx, local;
 unsigned char d;

 snd_gf1_poke(gus, 0L, 0xaa);
 snd_gf1_poke(gus, 1L, 0x55);
 if (snd_gf1_peek(gus, 0L) != 0xaa || snd_gf1_peek(gus, 1L) != 0x55) {
  dev_err(gus->card->dev,
   "plain GF1 card at 0x%lx without onboard DRAM?\n",
   gus->gf1.port);
  return -ENOMEM;
 }
 for (idx = 1, d = 0xab; idx < 4; idx++, d++) {
  local = idx << 18;
  snd_gf1_poke(gus, local, d);
  snd_gf1_poke(gus, local + 1, d + 1);
  if (snd_gf1_peek(gus, local) != d ||
      snd_gf1_peek(gus, local + 1) != d + 1 ||
      snd_gf1_peek(gus, 0L) != 0xaa)
   break;
 }
#if 1
 gus->gf1.memory = idx << 18;
#else
 gus->gf1.memory = 256 * 1024;
#endif
 for (l = 0, local = gus->gf1.memory; l < 4; l++, local -= 256 * 1024) {
  gus->gf1.mem_alloc.banks_8[l].address =
      gus->gf1.mem_alloc.banks_8[l].size = 0;
  gus->gf1.mem_alloc.banks_16[l].address = l << 18;
  gus->gf1.mem_alloc.banks_16[l].size = local > 0 ? 256 * 1024 : 0;
 }
 gus->gf1.mem_alloc.banks_8[0].size = gus->gf1.memory;
 return 0;  /* some memory were detected */
}

static int snd_gus_init_dma_irq(struct snd_gus_card * gus, int latches)
{
 struct snd_card *card;
 unsigned long flags;
 int irq, dma1, dma2;
 static const unsigned char irqs[16] =
  {0, 0, 1, 3, 0, 2, 0, 4, 0, 1, 0, 5, 6, 0, 0, 7};
 static const unsigned char dmas[8] =
  {6, 1, 0, 2, 0, 3, 4, 5};

 if (snd_BUG_ON(!gus))
  return -EINVAL;
 card = gus->card;
 if (snd_BUG_ON(!card))
  return -EINVAL;

 gus->mix_cntrl_reg &= 0xf8;
 gus->mix_cntrl_reg |= 0x01; /* disable MIC, LINE IN, enable LINE OUT */
 if (gus->codec_flag || gus->ess_flag) {
  gus->mix_cntrl_reg &= ~1; /* enable LINE IN */
  gus->mix_cntrl_reg |= 4; /* enable MIC */
 }
 dma1 = gus->gf1.dma1;
 dma1 = abs(dma1);
 dma1 = dmas[dma1 & 7];
 dma2 = gus->gf1.dma2;
 dma2 = abs(dma2);
 dma2 = dmas[dma2 & 7];
 dma1 |= gus->equal_dma ? 0x40 : (dma2 << 3);

 if ((dma1 & 7) == 0 || (dma2 & 7) == 0) {
  dev_err(gus->card->dev, "Error! DMA isn't defined.\n");
  return -EINVAL;
 }
 irq = gus->gf1.irq;
 irq = abs(irq);
 irq = irqs[irq & 0x0f];
 if (irq == 0) {
  dev_err(gus->card->dev, "Error! IRQ isn't defined.\n");
  return -EINVAL;
 }
 irq |= 0x40;
#if 0
 card->mixer.mix_ctrl_reg |= 0x10;
#endif

 spin_lock_irqsave(&gus->reg_lock, flags);
 outb(5, GUSP(gus, REGCNTRLS));
 outb(gus->mix_cntrl_reg, GUSP(gus, MIXCNTRLREG));
 outb(0x00, GUSP(gus, IRQDMACNTRLREG));
 outb(0, GUSP(gus, REGCNTRLS));
 spin_unlock_irqrestore(&gus->reg_lock, flags);

 udelay(100);

 spin_lock_irqsave(&gus->reg_lock, flags);
 outb(0x00 | gus->mix_cntrl_reg, GUSP(gus, MIXCNTRLREG));
 outb(dma1, GUSP(gus, IRQDMACNTRLREG));
 if (latches) {
  outb(0x40 | gus->mix_cntrl_reg, GUSP(gus, MIXCNTRLREG));
  outb(irq, GUSP(gus, IRQDMACNTRLREG));
 }
 spin_unlock_irqrestore(&gus->reg_lock, flags);

 udelay(100);

 spin_lock_irqsave(&gus->reg_lock, flags);
 outb(0x00 | gus->mix_cntrl_reg, GUSP(gus, MIXCNTRLREG));
 outb(dma1, GUSP(gus, IRQDMACNTRLREG));
 if (latches) {
  outb(0x40 | gus->mix_cntrl_reg, GUSP(gus, MIXCNTRLREG));
  outb(irq, GUSP(gus, IRQDMACNTRLREG));
 }
 spin_unlock_irqrestore(&gus->reg_lock, flags);

 snd_gf1_delay(gus);

 if (latches)
  gus->mix_cntrl_reg |= 0x08; /* enable latches */
 else
  gus->mix_cntrl_reg &= ~0x08; /* disable latches */
 spin_lock_irqsave(&gus->reg_lock, flags);
 outb(gus->mix_cntrl_reg, GUSP(gus, MIXCNTRLREG));
 outb(0, GUSP(gus, GF1PAGE));
 spin_unlock_irqrestore(&gus->reg_lock, flags);

 return 0;
}

static int snd_gus_check_version(struct snd_gus_card * gus)
{
 unsigned long flags;
 unsigned char val, rev;
 struct snd_card *card;

 card = gus->card;
 spin_lock_irqsave(&gus->reg_lock, flags);
 outb(0x20, GUSP(gus, REGCNTRLS));
 val = inb(GUSP(gus, REGCNTRLS));
 rev = inb(GUSP(gus, BOARDVERSION));
 spin_unlock_irqrestore(&gus->reg_lock, flags);
 dev_dbg(card->dev, "GF1 [0x%lx] init - val = 0x%x, rev = 0x%x\n", gus->gf1.port, val, rev);
 strscpy(card->driver, "GUS");
 strscpy(card->longname, "Gravis UltraSound Classic (2.4)");
 if ((val != 255 && (val & 0x06)) || (rev >= 5 && rev != 255)) {
  if (rev >= 5 && rev <= 9) {
   gus->ics_flag = 1;
   if (rev == 5)
    gus->ics_flipped = 1;
   card->longname[27] = '3';
   card->longname[29] = rev == 5 ? '5' : '7';
  }
  if (rev >= 10 && rev != 255) {
   if (rev >= 10 && rev <= 11) {
    strscpy(card->driver, "GUS MAX");
    strscpy(card->longname, "Gravis UltraSound MAX");
    gus->max_flag = 1;
   } else if (rev == 0x30) {
    strscpy(card->driver, "GUS ACE");
    strscpy(card->longname, "Gravis UltraSound Ace");
    gus->ace_flag = 1;
   } else if (rev == 0x50) {
    strscpy(card->driver, "GUS Extreme");
    strscpy(card->longname, "Gravis UltraSound Extreme");
    gus->ess_flag = 1;
   } else {
    dev_err(card->dev,
     "unknown GF1 revision number at 0x%lx - 0x%x (0x%x)\n",
     gus->gf1.port, rev, val);
    dev_err(card->dev,
     "  please - report to <perex@perex.cz>\n");
   }
  }
 }
 strscpy(card->shortname, card->longname, sizeof(card->shortname));
 gus->uart_enable = 1; /* standard GUSes doesn't have midi uart trouble */
 snd_gus_init_control(gus);
 return 0;
}

int snd_gus_initialize(struct snd_gus_card *gus)
{
 int err;

 if (!gus->interwave) {
  err = snd_gus_check_version(gus);
  if (err < 0) {
   dev_err(gus->card->dev, "version check failed\n");
   return err;
  }
  err = snd_gus_detect_memory(gus);
  if (err < 0)
   return err;
 }
 err = snd_gus_init_dma_irq(gus, 1);
 if (err < 0)
  return err;
 snd_gf1_start(gus);
 gus->initialized = 1;
 return 0;
}

  /* gus_io.c */
EXPORT_SYMBOL(snd_gf1_delay);
EXPORT_SYMBOL(snd_gf1_write8);
EXPORT_SYMBOL(snd_gf1_look8);
EXPORT_SYMBOL(snd_gf1_write16);
EXPORT_SYMBOL(snd_gf1_look16);
EXPORT_SYMBOL(snd_gf1_i_write8);
EXPORT_SYMBOL(snd_gf1_i_look8);
EXPORT_SYMBOL(snd_gf1_i_look16);
EXPORT_SYMBOL(snd_gf1_dram_addr);
EXPORT_SYMBOL(snd_gf1_write_addr);
EXPORT_SYMBOL(snd_gf1_poke);
EXPORT_SYMBOL(snd_gf1_peek);
  /* gus_reset.c */
EXPORT_SYMBOL(snd_gf1_alloc_voice);
EXPORT_SYMBOL(snd_gf1_free_voice);
EXPORT_SYMBOL(snd_gf1_ctrl_stop);
EXPORT_SYMBOL(snd_gf1_stop_voice);
  /* gus_mixer.c */
EXPORT_SYMBOL(snd_gf1_new_mixer);
  /* gus_pcm.c */
EXPORT_SYMBOL(snd_gf1_pcm_new);
  /* gus.c */
EXPORT_SYMBOL(snd_gus_create);
EXPORT_SYMBOL(snd_gus_initialize);
  /* gus_irq.c */
EXPORT_SYMBOL(snd_gus_interrupt);
  /* gus_uart.c */
EXPORT_SYMBOL(snd_gf1_rawmidi_new);
  /* gus_dram.c */
EXPORT_SYMBOL(snd_gus_dram_write);
EXPORT_SYMBOL(snd_gus_dram_read);
  /* gus_volume.c */
EXPORT_SYMBOL(snd_gf1_lvol_to_gvol_raw);
EXPORT_SYMBOL(snd_gf1_translate_freq);
  /* gus_mem.c */
EXPORT_SYMBOL(snd_gf1_mem_alloc);
EXPORT_SYMBOL(snd_gf1_mem_xfree);
EXPORT_SYMBOL(snd_gf1_mem_free);
EXPORT_SYMBOL(snd_gf1_mem_lock);