drivers/net/pse-pd/si3474.c

Source file repositories/reference/linux-study-clean/drivers/net/pse-pd/si3474.c

File Facts

System
Linux kernel
Corpus path
drivers/net/pse-pd/si3474.c
Extension
.c
Size
15621 bytes
Lines
579
Domain
Driver Families
Bucket
drivers/net
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 si3474_pi_desc {
	u8 chan[2];
	bool is_4p;
};

struct si3474_priv {
	struct i2c_client *client[2];
	struct pse_controller_dev pcdev;
	struct device_node *np;
	struct si3474_pi_desc pi[SI3474_MAX_CHANS];
};

static struct si3474_priv *to_si3474_priv(struct pse_controller_dev *pcdev)
{
	return container_of(pcdev, struct si3474_priv, pcdev);
}

static void si3474_get_channels(struct si3474_priv *priv, int id,
				u8 *chan0, u8 *chan1)
{
	*chan0 = priv->pi[id].chan[0];
	*chan1 = priv->pi[id].chan[1];
}

static struct i2c_client *si3474_get_chan_client(struct si3474_priv *priv,
						 u8 chan)
{
	return (chan < 4) ? priv->client[0] : priv->client[1];
}

static int si3474_pi_get_admin_state(struct pse_controller_dev *pcdev, int id,
				     struct pse_admin_state *admin_state)
{
	struct si3474_priv *priv = to_si3474_priv(pcdev);
	struct i2c_client *client;
	bool is_enabled;
	u8 chan0, chan1;
	s32 ret;

	si3474_get_channels(priv, id, &chan0, &chan1);
	client = si3474_get_chan_client(priv, chan0);

	ret = i2c_smbus_read_byte_data(client, PORT_MODE_REG);
	if (ret < 0) {
		admin_state->c33_admin_state =
			ETHTOOL_C33_PSE_ADMIN_STATE_UNKNOWN;
		return ret;
	}

	is_enabled = ret & (CHAN_MASK(chan0) | CHAN_MASK(chan1));

	if (is_enabled)
		admin_state->c33_admin_state =
			ETHTOOL_C33_PSE_ADMIN_STATE_ENABLED;
	else
		admin_state->c33_admin_state =
			ETHTOOL_C33_PSE_ADMIN_STATE_DISABLED;

	return 0;
}

static int si3474_pi_get_pw_status(struct pse_controller_dev *pcdev, int id,
				   struct pse_pw_status *pw_status)
{
	struct si3474_priv *priv = to_si3474_priv(pcdev);
	struct i2c_client *client;
	bool delivering;
	u8 chan0, chan1;
	s32 ret;

	si3474_get_channels(priv, id, &chan0, &chan1);
	client = si3474_get_chan_client(priv, chan0);

	ret = i2c_smbus_read_byte_data(client, POWER_STATUS_REG);
	if (ret < 0) {
		pw_status->c33_pw_status = ETHTOOL_C33_PSE_PW_D_STATUS_UNKNOWN;
		return ret;
	}

	delivering = ret & (CHAN_UPPER_BIT(chan0) | CHAN_UPPER_BIT(chan1));

	if (delivering)
		pw_status->c33_pw_status =
			ETHTOOL_C33_PSE_PW_D_STATUS_DELIVERING;
	else
		pw_status->c33_pw_status = ETHTOOL_C33_PSE_PW_D_STATUS_DISABLED;

	return 0;
}

Annotation

Implementation Notes