cx88-mpeg.c

trident tm5600的linux驱动

		return -EIO;
	pci_set_master(dev->pci);
	if (!pci_dma_supported(dev->pci,DMA_32BIT_MASK)) {
		printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
		return -EIO;
	}

	pci_read_config_byte(dev->pci, PCI_CLASS_REVISION, &dev->pci_rev);
	pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
	printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
	       "latency: %d, mmio: 0x%llx\n", dev->core->name,
	       pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
	       dev->pci_lat,(unsigned long long)pci_resource_start(dev->pci,0));

	/* initialize driver struct */
#if 0
	/* moved to cx88_core_get */
	init_MUTEX(&core->lock);
#endif
	spin_lock_init(&dev->slock);

	/* init dma queue */
	INIT_LIST_HEAD(&dev->mpegq.active);
	INIT_LIST_HEAD(&dev->mpegq.queued);
	dev->mpegq.timeout.function = cx8802_timeout;
	dev->mpegq.timeout.data     = (unsigned long)dev;
	init_timer(&dev->mpegq.timeout);
	cx88_risc_stopper(dev->pci,&dev->mpegq.stopper,
			  MO_TS_DMACNTRL,0x11,0x00);

	/* get irq */
	err = request_irq(dev->pci->irq, cx8802_irq,
			  IRQF_SHARED | IRQF_DISABLED, dev->core->name, dev);
	if (err < 0) {
		printk(KERN_ERR "%s: can't get IRQ %d\n",
		       dev->core->name, dev->pci->irq);
		return err;
	}
	cx_set(MO_PCI_INTMSK, core->pci_irqmask);

	/* everything worked */
	pci_set_drvdata(dev->pci,dev);
	return 0;
}

static void cx8802_fini_common(struct cx8802_dev *dev)
{
	dprintk( 2, "cx8802_fini_common\n" );
	cx8802_stop_dma(dev);
	pci_disable_device(dev->pci);

	/* unregister stuff */
	free_irq(dev->pci->irq, dev);
	pci_set_drvdata(dev->pci, NULL);

	/* free memory */
	btcx_riscmem_free(dev->pci,&dev->mpegq.stopper);
}

/* ----------------------------------------------------------- */

static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
{
	struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
	struct cx88_core *core = dev->core;

	/* stop mpeg dma */
	spin_lock(&dev->slock);
	if (!list_empty(&dev->mpegq.active)) {
		dprintk( 2, "suspend\n" );
		printk("%s: suspend mpeg\n", core->name);
		cx8802_stop_dma(dev);
		del_timer(&dev->mpegq.timeout);
	}
	spin_unlock(&dev->slock);

#if 1
	/* FIXME -- shutdown device */
	cx88_shutdown(dev->core);
#endif

	pci_save_state(pci_dev);
	if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
		pci_disable_device(pci_dev);
		dev->state.disabled = 1;
	}
	return 0;
}

static int cx8802_resume_common(struct pci_dev *pci_dev)
{
	struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
	struct cx88_core *core = dev->core;
	int err;

	if (dev->state.disabled) {
		err=pci_enable_device(pci_dev);
		if (err) {
			printk(KERN_ERR "%s: can't enable device\n",
					       dev->core->name);
			return err;
		}
		dev->state.disabled = 0;
	}
	err=pci_set_power_state(pci_dev, PCI_D0);
	if (err) {
		printk(KERN_ERR "%s: can't enable device\n",
					       dev->core->name);
		pci_disable_device(pci_dev);
		dev->state.disabled = 1;

		return err;
	}
	pci_restore_state(pci_dev);

#if 1
	/* FIXME: re-initialize hardware */
	cx88_reset(dev->core);
#endif

	/* restart video+vbi capture */
	spin_lock(&dev->slock);
	if (!list_empty(&dev->mpegq.active)) {
		printk("%s: resume mpeg\n", core->name);
		cx8802_restart_queue(dev,&dev->mpegq);
	}
	spin_unlock(&dev->slock);

	return 0;
}

#if defined(CONFIG_VIDEO_CX88_BLACKBIRD) || \
    defined(CONFIG_VIDEO_CX88_BLACKBIRD_MODULE)
struct cx8802_dev * cx8802_get_device(struct inode *inode)
{
	int minor = iminor(inode);
	struct cx8802_dev *dev;

	list_for_each_entry(dev, &cx8802_devlist, devlist)
		if (dev->mpeg_dev && dev->mpeg_dev->minor == minor)
			return dev;

	return NULL;
}
EXPORT_SYMBOL(cx8802_get_device);
#endif

struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board_type btype)
{
	struct cx8802_driver *d;

	list_for_each_entry(d, &dev->drvlist, drvlist)
		if (d->type_id == btype)
			return d;

	return NULL;
}

/* Driver asked for hardware access. */
static int cx8802_request_acquire(struct cx8802_driver *drv)
{
	struct cx88_core *core = drv->core;

	/* Fail a request for hardware if the device is busy. */
	if (core->active_type_id != CX88_BOARD_NONE &&
	    core->active_type_id != drv->type_id)
		return -EBUSY;

	core->input = CX88_VMUX_DVB;

	if (drv->advise_acquire)
	{
		mutex_lock(&drv->core->lock);
		core->active_ref++;
		if (core->active_type_id == CX88_BOARD_NONE) {
			core->active_type_id = drv->type_id;
			drv->advise_acquire(drv);
		}
		mutex_unlock(&drv->core->lock);

		mpeg_dbg(1,"%s() Post acquire GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
	}

	return 0;
}

/* Driver asked to release hardware. */
static int cx8802_request_release(struct cx8802_driver *drv)
{
	struct cx88_core *core = drv->core;

	mutex_lock(&drv->core->lock);
	if (drv->advise_release && --core->active_ref == 0)
	{
		drv->advise_release(drv);
		core->active_type_id = CX88_BOARD_NONE;
		mpeg_dbg(1,"%s() Post release GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
	}
	mutex_unlock(&drv->core->lock);

	return 0;
}

static int cx8802_check_driver(struct cx8802_driver *drv)
{
	if (drv == NULL)
		return -ENODEV;

	if ((drv->type_id != CX88_MPEG_DVB) &&
		(drv->type_id != CX88_MPEG_BLACKBIRD))
		return -EINVAL;

	if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
		(drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
		return -EINVAL;

	if ((drv->probe == NULL) ||
		(drv->remove == NULL) ||
		(drv->advise_acquire == NULL) ||
		(drv->advise_release == NULL))
		return -EINVAL;

	return 0;
}

int cx8802_register_driver(struct cx8802_driver *drv)
{
	struct cx8802_dev *dev;
	struct cx8802_driver *driver;
	int err, i = 0;

	printk(KERN_INFO
	       "cx88/2: registering cx8802 driver, type: %s access: %s\n",
	       drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
	       drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");

	if ((err = cx8802_check_driver(drv)) != 0) {
		printk(KERN_ERR "cx88/2: cx8802_driver is invalid\n");
		return err;
	}

	list_for_each_entry(dev, &cx8802_devlist, devlist) {
		printk(KERN_INFO
		       "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
		       dev->core->name, dev->pci->subsystem_vendor,
		       dev->pci->subsystem_device, dev->core->board.name,
		       dev->core->boardnr);

		/* Bring up a new struct for each driver instance */
		driver = kzalloc(sizeof(*drv),GFP_KERNEL);
		if (driver == NULL)
			return -ENOMEM;

		/* Snapshot of the driver registration data */
		drv->core = dev->core;
		drv->suspend = cx8802_suspend_common;
		drv->resume = cx8802_resume_common;
		drv->request_acquire = cx8802_request_acquire;
		drv->request_release = cx8802_request_release;
		memcpy(driver, drv, sizeof(*driver));

		err = drv->probe(driver);
		if (err == 0) {
			i++;
			mutex_lock(&drv->core->lock);
			list_add_tail(&driver->drvlist, &dev->drvlist);
			mutex_unlock(&drv->core->lock);
		} else {
			printk(KERN_ERR
			       "%s/2: cx8802 probe failed, err = %d\n",
			       dev->core->name, err);
		}

	}

	return i ? 0 : -ENODEV;
}

int cx8802_unregister_driver(struct cx8802_driver *drv)
{
	struct cx8802_dev *dev;
	struct cx8802_driver *d, *dtmp;
	int err = 0;

	printk(KERN_INFO
	       "cx88/2: unregistering cx8802 driver, type: %s access: %s\n",
	       drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
	       drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");

	list_for_each_entry(dev, &cx8802_devlist, devlist) {
		printk(KERN_INFO
		       "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
		       dev->core->name, dev->pci->subsystem_vendor,
		       dev->pci->subsystem_device, dev->core->board.name,
		       dev->core->boardnr);

		list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
			/* only unregister the correct driver type */
			if (d->type_id != drv->type_id)
				continue;

			err = d->remove(d);
			if (err == 0) {
				mutex_lock(&drv->core->lock);
				list_del(&d->drvlist);
				mutex_unlock(&drv->core->lock);
				kfree(d);
			} else
				printk(KERN_ERR "%s/2: cx8802 driver remove "
				       "failed (%d)\n", dev->core->name, err);
		}

	}

	return err;
}

/* ----------------------------------------------------------- */
static int __devinit cx8802_probe(struct pci_dev *pci_dev,
			       const struct pci_device_id *pci_id)
{
	struct cx8802_dev *dev;
	struct cx88_core  *core;
	int err;
#if defined(CONFIG_VIDEO_CX88_DVB) || defined(CONFIG_VIDEO_CX88_DVB_MODULE)
	struct videobuf_dvb_frontend *demod;
	int i;
#endif

	/* general setup */
	core = cx88_core_get(pci_dev);
	if (NULL == core)
		return -EINVAL;

	printk("%s/2: cx2388x 8802 Driver Manager\n", core->name);

	err = -ENODEV;
	if (!core->board.mpeg)
		goto fail_core;

	err = -ENOMEM;
	dev = kzalloc(sizeof(*dev),GFP_KERNEL);
	if (NULL == dev)
		goto fail_core;
	dev->pci = pci_dev;
	dev->core = core;

	err = cx8802_init_common(dev);
	if (err != 0)
		goto fail_free;

	INIT_LIST_HEAD(&dev->drvlist);
	list_add_tail(&dev->devlist,&cx8802_devlist);

#if defined(CONFIG_VIDEO_CX88_DVB) || defined(CONFIG_VIDEO_CX88_DVB_MODULE)
	mutex_init(&dev->frontends.lock);
	INIT_LIST_HEAD(&dev->frontends.felist);

	if (core->board.num_frontends)
		printk(KERN_INFO "%s() allocating %d frontend(s)\n", __func__, core->board.num_frontends);

	for (i = 1; i <= core->board.num_frontends; i++) {
		demod = videobuf_dvb_alloc_frontend(&dev->frontends, i);
		if(demod == NULL) {
			printk(KERN_ERR "%s() failed to alloc\n", __func__);
			err = -ENOMEM;
			goto fail_free;
		}
	}
#endif

	/* Maintain a reference so cx88-video can query the 8802 device. */
	core->dvbdev = dev;

	/* now autoload cx88-dvb or cx88-blackbird */
	request_modules(dev);
	return 0;

 fail_free:
	kfree(dev);
 fail_core:
	cx88_core_put(core,pci_dev);
	return err;
}

static void __devexit cx8802_remove(struct pci_dev *pci_dev)
{
	struct cx8802_dev *dev;

	dev = pci_get_drvdata(pci_dev);

	dprintk( 1, "%s\n", __func__);

	if (!list_empty(&dev->drvlist)) {
		struct cx8802_driver *drv, *tmp;
		int err;

		printk(KERN_WARNING "%s/2: Trying to remove cx8802 driver "
		       "while cx8802 sub-drivers still loaded?!\n",
		       dev->core->name);

		list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
			err = drv->remove(drv);
			if (err == 0) {
				mutex_lock(&drv->core->lock);
				list_del(&drv->drvlist);
				mutex_unlock(&drv->core->lock);
			} else
				printk(KERN_ERR "%s/2: cx8802 driver remove "
				       "failed (%d)\n", dev->core->name, err);
			kfree(drv);
		}
	}

	/* Destroy any 8802 reference. */
	dev->core->dvbdev = NULL;

	/* common */
	cx8802_fini_common(dev);
	cx88_core_put(dev->core,dev->pci);
	kfree(dev);
}

static struct pci_device_id cx8802_pci_tbl[] = {
	{
		.vendor       = 0x14f1,
		.device       = 0x8802,
		.subvendor    = PCI_ANY_ID,
		.subdevice    = PCI_ANY_ID,
	},{
		/* --- end of list --- */
	}
};
MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);

static struct pci_driver cx8802_pci_driver = {
	.name     = "cx88-mpeg driver manager",
	.id_table = cx8802_pci_tbl,
	.probe    = cx8802_probe,
	.remove   = __devexit_p(cx8802_remove),
#if 0
	/* TODO: Implement this */
	.suspend  = cx8802_suspend_common,
	.resume   = cx8802_resume_common,
#endif
};

static int cx8802_init(void)
{
	printk(KERN_INFO "cx88/2: cx2388x MPEG-TS Driver Manager version %d.%d.%d loaded\n",
	       (CX88_VERSION_CODE >> 16) & 0xff,
	       (CX88_VERSION_CODE >>  8) & 0xff,
	       CX88_VERSION_CODE & 0xff);
#ifdef SNAPSHOT
	printk(KERN_INFO "cx2388x: snapshot date %04d-%02d-%02d\n",
	       SNAPSHOT/10000, (SNAPSHOT/100)%100, SNAPSHOT%100);
#endif
	return pci_register_driver(&cx8802_pci_driver);
}

static void cx8802_fini(void)
{
	pci_unregister_driver(&cx8802_pci_driver);
}

module_init(cx8802_init);
module_exit(cx8802_fini);
EXPORT_SYMBOL(cx8802_buf_prepare);
EXPORT_SYMBOL(cx8802_buf_queue);
EXPORT_SYMBOL(cx8802_cancel_buffers);

EXPORT_SYMBOL(cx8802_register_driver);
EXPORT_SYMBOL(cx8802_unregister_driver);
EXPORT_SYMBOL(cx8802_get_driver);
#if 0
EXPORT_SYMBOL(cx8802_suspend_common);
EXPORT_SYMBOL(cx8802_resume_common);
#endif
/* ----------------------------------------------------------- */
/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 * kate: eol "unix"; indent-width 3; remove-trailing-space on; replace-trailing-space-save on; tab-width 8; replace-tabs off; space-indent off; mixed-indent off
 */