device-init.c

linux内核源码

}

static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
				 enum ps3_match_id match_id)
{
	int result;
	struct ps3_storage_device *p;
	u64 port, blk_size, num_blocks;
	unsigned int num_regions, i;

	pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);

	result = ps3_repository_read_stor_dev_info(repo->bus_index,
						   repo->dev_index, &port,
						   &blk_size, &num_blocks,
						   &num_regions);
	if (result) {
		printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
		       __func__, __LINE__, result);
		return -ENODEV;
	}

	pr_debug("%s:%u: (%u:%u:%u): port %lu blk_size %lu num_blocks %lu "
		 "num_regions %u\n", __func__, __LINE__, repo->bus_index,
		 repo->dev_index, repo->dev_type, port, blk_size, num_blocks,
		 num_regions);

	p = kzalloc(sizeof(struct ps3_storage_device) +
		    num_regions * sizeof(struct ps3_storage_region),
		    GFP_KERNEL);
	if (!p) {
		result = -ENOMEM;
		goto fail_malloc;
	}

	p->sbd.match_id = match_id;
	p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
	p->sbd.bus_id = repo->bus_id;
	p->sbd.dev_id = repo->dev_id;
	p->sbd.d_region = &p->dma_region;
	p->blk_size = blk_size;
	p->num_regions = num_regions;

	result = ps3_repository_find_interrupt(repo,
					       PS3_INTERRUPT_TYPE_EVENT_PORT,
					       &p->sbd.interrupt_id);
	if (result) {
		printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
		       __LINE__, result);
		result = -ENODEV;
		goto fail_find_interrupt;
	}

	/* FIXME: Arrange to only do this on a 'cold' boot */

	result = ps3_storage_wait_for_device(repo);
	if (result) {
		printk(KERN_ERR "%s:%u: storage_notification failed %d\n",
		       __func__, __LINE__, result);
		result = -ENODEV;
		goto fail_probe_notification;
	}

	for (i = 0; i < num_regions; i++) {
		unsigned int id;
		u64 start, size;

		result = ps3_repository_read_stor_dev_region(repo->bus_index,
							     repo->dev_index,
							     i, &id, &start,
							     &size);
		if (result) {
			printk(KERN_ERR
			       "%s:%u: read_stor_dev_region failed %d\n",
			       __func__, __LINE__, result);
			result = -ENODEV;
			goto fail_read_region;
		}
		pr_debug("%s:%u: region %u: id %u start %lu size %lu\n",
			 __func__, __LINE__, i, id, start, size);

		p->regions[i].id = id;
		p->regions[i].start = start;
		p->regions[i].size = size;
	}

	result = ps3_system_bus_device_register(&p->sbd);
	if (result) {
		pr_debug("%s:%u ps3_system_bus_device_register failed\n",
			 __func__, __LINE__);
		goto fail_device_register;
	}

	pr_debug(" <- %s:%u\n", __func__, __LINE__);
	return 0;

fail_device_register:
fail_read_region:
fail_probe_notification:
fail_find_interrupt:
	kfree(p);
fail_malloc:
	pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
	return result;
}

static int __init ps3_register_vuart_devices(void)
{
	int result;
	unsigned int port_number;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	result = ps3_repository_read_vuart_av_port(&port_number);
	if (result)
		port_number = 0; /* av default */

	result = ps3_setup_vuart_device(PS3_MATCH_ID_AV_SETTINGS, port_number);
	WARN_ON(result);

	result = ps3_repository_read_vuart_sysmgr_port(&port_number);
	if (result)
		port_number = 2; /* sysmgr default */

	result = ps3_setup_vuart_device(PS3_MATCH_ID_SYSTEM_MANAGER,
		port_number);
	WARN_ON(result);

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return result;
}

static int __init ps3_register_sound_devices(void)
{
	int result;
	struct layout {
		struct ps3_system_bus_device dev;
		struct ps3_dma_region d_region;
		struct ps3_mmio_region m_region;
	} *p;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	p = kzalloc(sizeof(*p), GFP_KERNEL);
	if (!p)
		return -ENOMEM;

	p->dev.match_id = PS3_MATCH_ID_SOUND;
	p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;
	p->dev.d_region = &p->d_region;
	p->dev.m_region = &p->m_region;

	result = ps3_system_bus_device_register(&p->dev);

	if (result)
		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
			__func__, __LINE__);

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return result;
}

static int __init ps3_register_graphics_devices(void)
{
	int result;
	struct layout {
		struct ps3_system_bus_device dev;
	} *p;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	p = kzalloc(sizeof(struct layout), GFP_KERNEL);

	if (!p)
		return -ENOMEM;

	p->dev.match_id = PS3_MATCH_ID_GRAPHICS;
	p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;

	result = ps3_system_bus_device_register(&p->dev);

	if (result)
		pr_debug("%s:%d ps3_system_bus_device_register failed\n",
			__func__, __LINE__);

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return result;
}

/**
 * ps3_register_repository_device - Register a device from the repositiory info.
 *
 */

static int ps3_register_repository_device(
	const struct ps3_repository_device *repo)
{
	int result;

	switch (repo->dev_type) {
	case PS3_DEV_TYPE_SB_GELIC:
		result = ps3_setup_gelic_device(repo);
		if (result) {
			pr_debug("%s:%d ps3_setup_gelic_device failed\n",
				__func__, __LINE__);
		}
		break;
	case PS3_DEV_TYPE_SB_USB:

		/* Each USB device has both an EHCI and an OHCI HC */

		result = ps3_setup_ehci_device(repo);

		if (result) {
			pr_debug("%s:%d ps3_setup_ehci_device failed\n",
				__func__, __LINE__);
		}

		result = ps3_setup_ohci_device(repo);

		if (result) {
			pr_debug("%s:%d ps3_setup_ohci_device failed\n",
				__func__, __LINE__);
		}
		break;
	case PS3_DEV_TYPE_STOR_DISK:
		result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);

		/* Some devices are not accessable from the Other OS lpar. */
		if (result == -ENODEV) {
			result = 0;
			pr_debug("%s:%u: not accessable\n", __func__,
				 __LINE__);
		}

		if (result)
			pr_debug("%s:%u ps3_setup_storage_dev failed\n",
				 __func__, __LINE__);
		break;

	case PS3_DEV_TYPE_STOR_ROM:
		result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
		if (result)
			pr_debug("%s:%u ps3_setup_storage_dev failed\n",
				 __func__, __LINE__);
		break;

	case PS3_DEV_TYPE_STOR_FLASH:
		result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
		if (result)
			pr_debug("%s:%u ps3_setup_storage_dev failed\n",
				 __func__, __LINE__);
		break;

	default:
		result = 0;
		pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
			repo->dev_type);
	}

	return result;
}

/**
 * ps3_probe_thread - Background repository probing at system startup.
 *
 * This implementation only supports background probing on a single bus.
 */

static int ps3_probe_thread(void *data)
{
	struct ps3_repository_device *repo = data;
	int result;
	unsigned int ms = 250;

	pr_debug(" -> %s:%u: kthread started\n", __func__, __LINE__);

	do {
		try_to_freeze();

		pr_debug("%s:%u: probing...\n", __func__, __LINE__);

		do {
			result = ps3_repository_find_device(repo);

			if (result == -ENODEV)
				pr_debug("%s:%u: nothing new\n", __func__,
					__LINE__);
			else if (result)
				pr_debug("%s:%u: find device error.\n",
					__func__, __LINE__);
			else {
				pr_debug("%s:%u: found device (%u:%u:%u)\n",
					 __func__, __LINE__, repo->bus_index,
					 repo->dev_index, repo->dev_type);
				ps3_register_repository_device(repo);
				ps3_repository_bump_device(repo);
				ms = 250;
			}
		} while (!result);

		pr_debug("%s:%u: ms %u\n", __func__, __LINE__, ms);

		if ( ms > 60000)
			break;

		msleep_interruptible(ms);

		/* An exponential backoff. */
		ms <<= 1;

	} while (!kthread_should_stop());

	pr_debug(" <- %s:%u: kthread finished\n", __func__, __LINE__);

	return 0;
}

/**
 * ps3_start_probe_thread - Starts the background probe thread.
 *
 */

static int __init ps3_start_probe_thread(enum ps3_bus_type bus_type)
{
	int result;
	struct task_struct *task;
	static struct ps3_repository_device repo; /* must be static */

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	memset(&repo, 0, sizeof(repo));

	repo.bus_type = bus_type;

	result = ps3_repository_find_bus(repo.bus_type, 0, &repo.bus_index);

	if (result) {
		printk(KERN_ERR "%s: Cannot find bus (%d)\n", __func__, result);
		return -ENODEV;
	}

	result = ps3_repository_read_bus_id(repo.bus_index, &repo.bus_id);

	if (result) {
		printk(KERN_ERR "%s: read_bus_id failed %d\n", __func__,
			result);
		return -ENODEV;
	}

	task = kthread_run(ps3_probe_thread, &repo, "ps3-probe-%u", bus_type);

	if (IS_ERR(task)) {
		result = PTR_ERR(task);
		printk(KERN_ERR "%s: kthread_run failed %d\n", __func__,
		       result);
		return result;
	}

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return 0;
}

/**
 * ps3_register_devices - Probe the system and register devices found.
 *
 * A device_initcall() routine.
 */

static int __init ps3_register_devices(void)
{
	int result;

	if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
		return -ENODEV;

	pr_debug(" -> %s:%d\n", __func__, __LINE__);

	/* ps3_repository_dump_bus_info(); */

	result = ps3_start_probe_thread(PS3_BUS_TYPE_STORAGE);

	ps3_register_vuart_devices();

	ps3_register_graphics_devices();

	ps3_repository_find_devices(PS3_BUS_TYPE_SB,
		ps3_register_repository_device);

	ps3_register_sound_devices();

	pr_debug(" <- %s:%d\n", __func__, __LINE__);
	return 0;
}

device_initcall(ps3_register_devices);