drivers/char/sonypi.c

Source file repositories/reference/linux-study-clean/drivers/char/sonypi.c

File Facts

System
Linux kernel
Corpus path
drivers/char/sonypi.c
Extension
.c
Size
41336 bytes
Lines
1548
Domain
Driver Families
Bucket
drivers/char
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern 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

static const struct file_operations sonypi_misc_fops = {
	.owner		= THIS_MODULE,
	.read		= sonypi_misc_read,
	.poll		= sonypi_misc_poll,
	.open		= sonypi_misc_open,
	.release	= sonypi_misc_release,
	.fasync		= sonypi_misc_fasync,
	.unlocked_ioctl	= sonypi_misc_ioctl,
};

static struct miscdevice sonypi_misc_device = {
	.minor		= MISC_DYNAMIC_MINOR,
	.name		= "sonypi",
	.fops		= &sonypi_misc_fops,
};

static void sonypi_enable(unsigned int camera_on)
{
	switch (sonypi_device.model) {
	case SONYPI_DEVICE_MODEL_TYPE1:
		sonypi_type1_srs();
		break;
	case SONYPI_DEVICE_MODEL_TYPE2:
		sonypi_type2_srs();
		break;
	case SONYPI_DEVICE_MODEL_TYPE3:
		sonypi_type3_srs();
		break;
	}

	sonypi_call1(0x82);
	sonypi_call2(0x81, 0xff);
	sonypi_call1(compat ? 0x92 : 0x82);

	/* Enable ACPI mode to get Fn key events */
	if (!SONYPI_ACPI_ACTIVE && fnkeyinit)
		outb(0xf0, 0xb2);

	if (camera && camera_on)
		sonypi_camera_on();
}

static int sonypi_disable(void)
{
	sonypi_call2(0x81, 0);	/* make sure we don't get any more events */
	if (camera)
		sonypi_camera_off();

	/* disable ACPI mode */
	if (!SONYPI_ACPI_ACTIVE && fnkeyinit)
		outb(0xf1, 0xb2);

	switch (sonypi_device.model) {
	case SONYPI_DEVICE_MODEL_TYPE1:
		sonypi_type1_dis();
		break;
	case SONYPI_DEVICE_MODEL_TYPE2:
		sonypi_type2_dis();
		break;
	case SONYPI_DEVICE_MODEL_TYPE3:
		sonypi_type3_dis();
		break;
	}

	return 0;
}

#ifdef CONFIG_ACPI
static int sonypi_acpi_probe(struct platform_device *pdev)
{
	struct acpi_device *device = ACPI_COMPANION(&pdev->dev);

	sonypi_acpi_device = device;
	strcpy(acpi_device_name(device), "Sony laptop hotkeys");
	strcpy(acpi_device_class(device), "sony/hotkey");
	return 0;
}

static void sonypi_acpi_remove(struct platform_device *pdev)
{
	sonypi_acpi_device = NULL;
}

static const struct acpi_device_id sonypi_device_ids[] = {
	{"SNY6001", 0},
	{"", 0},
};

static struct platform_driver sonypi_acpi_driver = {
	.probe = sonypi_acpi_probe,

Annotation

Implementation Notes