drivers/bcma/main.c

Source file repositories/reference/linux-study-clean/drivers/bcma/main.c

File Facts

System
Linux kernel
Corpus path
drivers/bcma/main.c
Extension
.c
Size
16594 bytes
Lines
706
Domain
Driver Families
Bucket
drivers/bcma
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 int bcma_bus_match(struct device *dev, const struct device_driver *drv);
static int bcma_device_probe(struct device *dev);
static void bcma_device_remove(struct device *dev);
static int bcma_device_uevent(const struct device *dev, struct kobj_uevent_env *env);

static ssize_t manuf_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	return sprintf(buf, "0x%03X\n", core->id.manuf);
}
static DEVICE_ATTR_RO(manuf);

static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	return sprintf(buf, "0x%03X\n", core->id.id);
}
static DEVICE_ATTR_RO(id);

static ssize_t rev_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	return sprintf(buf, "0x%02X\n", core->id.rev);
}
static DEVICE_ATTR_RO(rev);

static ssize_t class_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct bcma_device *core = container_of(dev, struct bcma_device, dev);
	return sprintf(buf, "0x%X\n", core->id.class);
}
static DEVICE_ATTR_RO(class);

static struct attribute *bcma_device_attrs[] = {
	&dev_attr_manuf.attr,
	&dev_attr_id.attr,
	&dev_attr_rev.attr,
	&dev_attr_class.attr,
	NULL,
};
ATTRIBUTE_GROUPS(bcma_device);

static const struct bus_type bcma_bus_type = {
	.name		= "bcma",
	.match		= bcma_bus_match,
	.probe		= bcma_device_probe,
	.remove		= bcma_device_remove,
	.uevent		= bcma_device_uevent,
	.dev_groups	= bcma_device_groups,
};

static u16 bcma_cc_core_id(struct bcma_bus *bus)
{
	if (bus->chipinfo.id == BCMA_CHIP_ID_BCM4706)
		return BCMA_CORE_4706_CHIPCOMMON;
	return BCMA_CORE_CHIPCOMMON;
}

struct bcma_device *bcma_find_core_unit(struct bcma_bus *bus, u16 coreid,
					u8 unit)
{
	struct bcma_device *core;

	list_for_each_entry(core, &bus->cores, list) {
		if (core->id.id == coreid && core->core_unit == unit)
			return core;
	}
	return NULL;
}
EXPORT_SYMBOL_GPL(bcma_find_core_unit);

bool bcma_wait_value(struct bcma_device *core, u16 reg, u32 mask, u32 value,
		     int timeout)
{
	unsigned long deadline = jiffies + timeout;
	u32 val;

	do {
		val = bcma_read32(core, reg);
		if ((val & mask) == value)
			return true;
		cpu_relax();
		udelay(10);
	} while (!time_after_eq(jiffies, deadline));

	bcma_warn(core->bus, "Timeout waiting for register 0x%04X!\n", reg);

	return false;
}

Annotation

Implementation Notes