drivers/media/usb/go7007/go7007-loader.c

Source file repositories/reference/linux-study-clean/drivers/media/usb/go7007/go7007-loader.c

File Facts

System
Linux kernel
Corpus path
drivers/media/usb/go7007/go7007-loader.c
Extension
.c
Size
3307 bytes
Lines
130
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct fw_config {
	u16 vendor;
	u16 product;
	const char * const fw_name1;
	const char * const fw_name2;
};

static struct fw_config fw_configs[] = {
	{ 0x1943, 0xa250, "go7007/s2250-1.fw", "go7007/s2250-2.fw" },
	{ 0x093b, 0xa002, "go7007/px-m402u.fw", NULL },
	{ 0x093b, 0xa004, "go7007/px-tv402u.fw", NULL },
	{ 0x0eb1, 0x6666, "go7007/lr192.fw", NULL },
	{ 0x0eb1, 0x6668, "go7007/wis-startrek.fw", NULL },
	{ 0, 0, NULL, NULL }
};
MODULE_FIRMWARE("go7007/s2250-1.fw");
MODULE_FIRMWARE("go7007/s2250-2.fw");
MODULE_FIRMWARE("go7007/px-m402u.fw");
MODULE_FIRMWARE("go7007/px-tv402u.fw");
MODULE_FIRMWARE("go7007/lr192.fw");
MODULE_FIRMWARE("go7007/wis-startrek.fw");

static int go7007_loader_probe(struct usb_interface *interface,
				const struct usb_device_id *id)
{
	struct usb_device *usbdev;
	const struct firmware *fw;
	u16 vendor, product;
	const char *fw1, *fw2;
	int ret;
	int i;

	usbdev = interface_to_usbdev(interface);

	if (usbdev->descriptor.bNumConfigurations != 1) {
		dev_err(&interface->dev, "can't handle multiple config\n");
		goto failed2;
	}

	vendor = le16_to_cpu(usbdev->descriptor.idVendor);
	product = le16_to_cpu(usbdev->descriptor.idProduct);

	for (i = 0; fw_configs[i].fw_name1; i++)
		if (fw_configs[i].vendor == vendor &&
		    fw_configs[i].product == product)
			break;

	/* Should never happen */
	if (fw_configs[i].fw_name1 == NULL)
		goto failed2;

	fw1 = fw_configs[i].fw_name1;
	fw2 = fw_configs[i].fw_name2;

	dev_info(&interface->dev, "loading firmware %s\n", fw1);

	if (request_firmware(&fw, fw1, &usbdev->dev)) {
		dev_err(&interface->dev,
			"unable to load firmware from file \"%s\"\n", fw1);
		goto failed2;
	}
	ret = cypress_load_firmware(usbdev, fw, CYPRESS_FX2);
	release_firmware(fw);
	if (0 != ret) {
		dev_err(&interface->dev, "loader download failed\n");
		goto failed2;
	}

	if (fw2 == NULL)
		return 0;

	if (request_firmware(&fw, fw2, &usbdev->dev)) {
		dev_err(&interface->dev,
			"unable to load firmware from file \"%s\"\n", fw2);
		goto failed2;
	}
	ret = cypress_load_firmware(usbdev, fw, CYPRESS_FX2);
	release_firmware(fw);
	if (0 != ret) {
		dev_err(&interface->dev, "firmware download failed\n");
		goto failed2;
	}
	return 0;

failed2:
	dev_err(&interface->dev, "probe failed\n");
	return -ENODEV;
}

static void go7007_loader_disconnect(struct usb_interface *interface)

Annotation

Implementation Notes