vx_core.c

linux-2.6.15.6

	spin_lock_irqsave(&chip->lock, flags);
	err = vx_send_rih_nolock(chip, cmd);
	spin_unlock_irqrestore(&chip->lock, flags);
	return err;
}

#define END_OF_RESET_WAIT_TIME		500	/* us */

/**
 * snd_vx_boot_xilinx - boot up the xilinx interface
 * @boot: the boot record to load
 */
int snd_vx_load_boot_image(vx_core_t *chip, const struct firmware *boot)
{
	unsigned int i;
	int no_fillup = vx_has_new_dsp(chip);

	/* check the length of boot image */
	snd_assert(boot->size > 0, return -EINVAL);
	snd_assert(boot->size % 3 == 0, return -EINVAL);
#if 0
	{
		/* more strict check */
		unsigned int c = ((u32)boot->data[0] << 16) | ((u32)boot->data[1] << 8) | boot->data[2];
		snd_assert(boot->size == (c + 2) * 3, return -EINVAL);
	}
#endif

	/* reset dsp */
	vx_reset_dsp(chip);
	
	udelay(END_OF_RESET_WAIT_TIME); /* another wait? */

	/* download boot strap */
	for (i = 0; i < 0x600; i += 3) {
		if (i >= boot->size) {
			if (no_fillup)
				break;
			if (vx_wait_isr_bit(chip, ISR_TX_EMPTY) < 0) {
				snd_printk(KERN_ERR "dsp boot failed at %d\n", i);
				return -EIO;
			}
			vx_outb(chip, TXH, 0);
			vx_outb(chip, TXM, 0);
			vx_outb(chip, TXL, 0);
		} else {
			unsigned char *image = boot->data + i;
			if (vx_wait_isr_bit(chip, ISR_TX_EMPTY) < 0) {
				snd_printk(KERN_ERR "dsp boot failed at %d\n", i);
				return -EIO;
			}
			vx_outb(chip, TXH, image[0]);
			vx_outb(chip, TXM, image[1]);
			vx_outb(chip, TXL, image[2]);
		}
	}
	return 0;
}

/*
 * vx_test_irq_src - query the source of interrupts
 *
 * called from irq handler only
 */
static int vx_test_irq_src(vx_core_t *chip, unsigned int *ret)
{
	int err;

	vx_init_rmh(&chip->irq_rmh, CMD_TEST_IT);
	spin_lock(&chip->lock);
	err = vx_send_msg_nolock(chip, &chip->irq_rmh);
	if (err < 0)
		*ret = 0;
	else
		*ret = chip->irq_rmh.Stat[0];
	spin_unlock(&chip->lock);
	return err;
}


/*
 * vx_interrupt - soft irq handler
 */
static void vx_interrupt(unsigned long private_data)
{
	vx_core_t *chip = (vx_core_t *) private_data;
	unsigned int events;
		
	if (chip->chip_status & VX_STAT_IS_STALE)
		return;

	if (vx_test_irq_src(chip, &events) < 0)
		return;
    
#if 0
	if (events & 0x000800)
		printk(KERN_ERR "DSP Stream underrun ! IRQ events = 0x%x\n", events);
#endif
	// printk(KERN_DEBUG "IRQ events = 0x%x\n", events);

	/* We must prevent any application using this DSP
	 * and block any further request until the application
	 * either unregisters or reloads the DSP
	 */
	if (events & FATAL_DSP_ERROR) {
		snd_printk(KERN_ERR "vx_core: fatal DSP error!!\n");
		return;
	}

	/* The start on time code conditions are filled (ie the time code
	 * received by the board is equal to one of those given to it).
	 */
	if (events & TIME_CODE_EVENT_PENDING)
		; /* so far, nothing to do yet */

	/* The frequency has changed on the board (UER mode). */
	if (events & FREQUENCY_CHANGE_EVENT_PENDING)
		vx_change_frequency(chip);

	/* update the pcm streams */
	vx_pcm_update_intr(chip, events);
}


/**
 * snd_vx_irq_handler - interrupt handler
 */
irqreturn_t snd_vx_irq_handler(int irq, void *dev, struct pt_regs *regs)
{
	vx_core_t *chip = dev;

	if (! (chip->chip_status & VX_STAT_CHIP_INIT) ||
	    (chip->chip_status & VX_STAT_IS_STALE))
		return IRQ_NONE;
	if (! vx_test_and_ack(chip))
		tasklet_hi_schedule(&chip->tq);
	return IRQ_HANDLED;
}


/*
 */
static void vx_reset_board(vx_core_t *chip, int cold_reset)
{
	snd_assert(chip->ops->reset_board, return);

	/* current source, later sync'ed with target */
	chip->audio_source = VX_AUDIO_SRC_LINE;
	if (cold_reset) {
		chip->audio_source_target = chip->audio_source;
		chip->clock_source = INTERNAL_QUARTZ;
		chip->clock_mode = VX_CLOCK_MODE_AUTO;
		chip->freq = 48000;
		chip->uer_detected = VX_UER_MODE_NOT_PRESENT;
		chip->uer_bits = SNDRV_PCM_DEFAULT_CON_SPDIF;
	}

	chip->ops->reset_board(chip, cold_reset);

	vx_reset_codec(chip, cold_reset);

	vx_set_internal_clock(chip, chip->freq);

	/* Reset the DSP */
	vx_reset_dsp(chip);

	if (vx_is_pcmcia(chip)) {
		/* Acknowledge any pending IRQ and reset the MEMIRQ flag. */
		vx_test_and_ack(chip);
		vx_validate_irq(chip, 1);
	}

	/* init CBits */
	vx_set_iec958_status(chip, chip->uer_bits);
}


/*
 * proc interface
 */

static void vx_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
{
	vx_core_t *chip = entry->private_data;
	static char *audio_src_vxp[] = { "Line", "Mic", "Digital" };
	static char *audio_src_vx2[] = { "Analog", "Analog", "Digital" };
	static char *clock_mode[] = { "Auto", "Internal", "External" };
	static char *clock_src[] = { "Internal", "External" };
	static char *uer_type[] = { "Consumer", "Professional", "Not Present" };
	
	snd_iprintf(buffer, "%s\n", chip->card->longname);
	snd_iprintf(buffer, "Xilinx Firmware: %s\n",
		    chip->chip_status & VX_STAT_XILINX_LOADED ? "Loaded" : "No");
	snd_iprintf(buffer, "Device Initialized: %s\n",
		    chip->chip_status & VX_STAT_DEVICE_INIT ? "Yes" : "No");
	snd_iprintf(buffer, "DSP audio info:");
	if (chip->audio_info & VX_AUDIO_INFO_REAL_TIME)
		snd_iprintf(buffer, " realtime");
	if (chip->audio_info & VX_AUDIO_INFO_OFFLINE)
		snd_iprintf(buffer, " offline");
	if (chip->audio_info & VX_AUDIO_INFO_MPEG1)
		snd_iprintf(buffer, " mpeg1");
	if (chip->audio_info & VX_AUDIO_INFO_MPEG2)
		snd_iprintf(buffer, " mpeg2");
	if (chip->audio_info & VX_AUDIO_INFO_LINEAR_8)
		snd_iprintf(buffer, " linear8");
	if (chip->audio_info & VX_AUDIO_INFO_LINEAR_16)
		snd_iprintf(buffer, " linear16");
	if (chip->audio_info & VX_AUDIO_INFO_LINEAR_24)
		snd_iprintf(buffer, " linear24");
	snd_iprintf(buffer, "\n");
	snd_iprintf(buffer, "Input Source: %s\n", vx_is_pcmcia(chip) ?
		    audio_src_vxp[chip->audio_source] :
		    audio_src_vx2[chip->audio_source]);
	snd_iprintf(buffer, "Clock Mode: %s\n", clock_mode[chip->clock_mode]);
	snd_iprintf(buffer, "Clock Source: %s\n", clock_src[chip->clock_source]);
	snd_iprintf(buffer, "Frequency: %d\n", chip->freq);
	snd_iprintf(buffer, "Detected Frequency: %d\n", chip->freq_detected);
	snd_iprintf(buffer, "Detected UER type: %s\n", uer_type[chip->uer_detected]);
	snd_iprintf(buffer, "Min/Max/Cur IBL: %d/%d/%d (granularity=%d)\n",
		    chip->ibl.min_size, chip->ibl.max_size, chip->ibl.size,
		    chip->ibl.granularity);
}

static void vx_proc_init(vx_core_t *chip)
{
	snd_info_entry_t *entry;

	if (! snd_card_proc_new(chip->card, "vx-status", &entry))
		snd_info_set_text_ops(entry, chip, 1024, vx_proc_read);
}


/**
 * snd_vx_dsp_boot - load the DSP boot
 */
int snd_vx_dsp_boot(vx_core_t *chip, const struct firmware *boot)
{
	int err;
	int cold_reset = !(chip->chip_status & VX_STAT_DEVICE_INIT);

	vx_reset_board(chip, cold_reset);
	vx_validate_irq(chip, 0);

	if ((err = snd_vx_load_boot_image(chip, boot)) < 0)
		return err;
	snd_vx_delay(chip, 10);

	return 0;
}

/**
 * snd_vx_dsp_load - load the DSP image
 */
int snd_vx_dsp_load(vx_core_t *chip, const struct firmware *dsp)
{
	unsigned int i;
	int err;
	unsigned int csum = 0;
	unsigned char *image, *cptr;

	snd_assert(dsp->size % 3 == 0, return -EINVAL);

	vx_toggle_dac_mute(chip, 1);

	/* Transfert data buffer from PC to DSP */
	for (i = 0; i < dsp->size; i += 3) {
		image = dsp->data + i;
		/* Wait DSP ready for a new read */
		if ((err = vx_wait_isr_bit(chip, ISR_TX_EMPTY)) < 0) {
			printk("dsp loading error at position %d\n", i);
			return err;
		}
		cptr = image;
		csum ^= *cptr;
		csum = (csum >> 24) | (csum << 8);
		vx_outb(chip, TXH, *cptr++);
		csum ^= *cptr;
		csum = (csum >> 24) | (csum << 8);
		vx_outb(chip, TXM, *cptr++);
		csum ^= *cptr;
		csum = (csum >> 24) | (csum << 8);
		vx_outb(chip, TXL, *cptr++);
	}
	snd_printdd(KERN_DEBUG "checksum = 0x%08x\n", csum);

	snd_vx_delay(chip, 200);

	if ((err = vx_wait_isr_bit(chip, ISR_CHK)) < 0)
		return err;

	vx_toggle_dac_mute(chip, 0);

	vx_test_and_ack(chip);
	vx_validate_irq(chip, 1);

	return 0;
}

#ifdef CONFIG_PM
/*
 * suspend
 */
static int snd_vx_suspend(snd_card_t *card, pm_message_t state)
{
	vx_core_t *chip = card->pm_private_data;
	unsigned int i;

	snd_assert(chip, return -EINVAL);

	chip->chip_status |= VX_STAT_IN_SUSPEND;
	for (i = 0; i < chip->hw->num_codecs; i++)
		snd_pcm_suspend_all(chip->pcm[i]);

	return 0;
}

/*
 * resume
 */
static int snd_vx_resume(snd_card_t *card)
{
	vx_core_t *chip = card->pm_private_data;
	int i, err;

	snd_assert(chip, return -EINVAL);

	chip->chip_status &= ~VX_STAT_CHIP_INIT;

	for (i = 0; i < 4; i++) {
		if (! chip->firmware[i])
			continue;
		err = chip->ops->load_dsp(chip, i, chip->firmware[i]);
		if (err < 0) {
			snd_printk(KERN_ERR "vx: firmware resume error at DSP %d\n", i);
			return -EIO;
		}
	}

	chip->chip_status |= VX_STAT_CHIP_INIT;
	chip->chip_status &= ~VX_STAT_IN_SUSPEND;

	return 0;
}

#endif

/**
 * snd_vx_create - constructor for vx_core_t
 * @hw: hardware specific record
 *
 * this function allocates the instance and prepare for the hardware
 * initialization.
 *
 * return the instance pointer if successful, NULL in error.
 */
vx_core_t *snd_vx_create(snd_card_t *card, struct snd_vx_hardware *hw,
			 struct snd_vx_ops *ops,
			 int extra_size)
{
	vx_core_t *chip;

	snd_assert(card && hw && ops, return NULL);

	chip = kzalloc(sizeof(*chip) + extra_size, GFP_KERNEL);
	if (! chip) {
		snd_printk(KERN_ERR "vx_core: no memory\n");
		return NULL;
	}
	spin_lock_init(&chip->lock);
	spin_lock_init(&chip->irq_lock);
	chip->irq = -1;
	chip->hw = hw;
	chip->type = hw->type;
	chip->ops = ops;
	tasklet_init(&chip->tq, vx_interrupt, (unsigned long)chip);
	init_MUTEX(&chip->mixer_mutex);

	chip->card = card;
	card->private_data = chip;
	strcpy(card->driver, hw->name);
	sprintf(card->shortname, "Digigram %s", hw->name);

	snd_card_set_pm_callback(card, snd_vx_suspend, snd_vx_resume, chip);

	vx_proc_init(chip);

	return chip;
}

/*
 * module entries
 */
static int __init alsa_vx_core_init(void)
{
	return 0;
}

static void __exit alsa_vx_core_exit(void)
{
}

module_init(alsa_vx_core_init)
module_exit(alsa_vx_core_exit)

/*
 * exports
 */
EXPORT_SYMBOL(snd_vx_check_reg_bit);
EXPORT_SYMBOL(snd_vx_create);
EXPORT_SYMBOL(snd_vx_setup_firmware);
EXPORT_SYMBOL(snd_vx_free_firmware);
EXPORT_SYMBOL(snd_vx_irq_handler);
EXPORT_SYMBOL(snd_vx_delay);
EXPORT_SYMBOL(snd_vx_dsp_boot);
EXPORT_SYMBOL(snd_vx_dsp_load);
EXPORT_SYMBOL(snd_vx_load_boot_image);