drivers/net/ethernet/wangxun/txgbe/txgbe_hw.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/wangxun/txgbe/txgbe_hw.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/wangxun/txgbe/txgbe_hw.c
Extension
.c
Size
5762 bytes
Lines
228
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

if (wx->mac.type == wx_mac_aml) {
			if (i >= TXGBE_EEPROM_I2C_SRART_PTR &&
			    i < TXGBE_EEPROM_I2C_END_PTR)
				local_buffer[i] = 0xffff;
		}
		if (i != wx->eeprom.sw_region_offset + TXGBE_EEPROM_CHECKSUM)
			*checksum += local_buffer[i];
	}

	kvfree(eeprom_ptrs);

	*checksum = TXGBE_EEPROM_SUM - *checksum;

	return 0;
}

/**
 *  txgbe_validate_eeprom_checksum - Validate EEPROM checksum
 *  @wx: pointer to hardware structure
 *  @checksum_val: calculated checksum
 *
 *  Performs checksum calculation and validates the EEPROM checksum.  If the
 *  caller does not need checksum_val, the value can be NULL.
 **/
int txgbe_validate_eeprom_checksum(struct wx *wx, u16 *checksum_val)
{
	u16 read_checksum = 0;
	u16 checksum;
	int status;

	/* Read the first word from the EEPROM. If this times out or fails, do
	 * not continue or we could be in for a very long wait while every
	 * EEPROM read fails
	 */
	status = wx_read_ee_hostif(wx, 0, &checksum);
	if (status) {
		wx_err(wx, "EEPROM read failed\n");
		return status;
	}

	checksum = 0;
	status = txgbe_calc_eeprom_checksum(wx, &checksum);
	if (status != 0)
		return status;

	status = wx_read_ee_hostif(wx, wx->eeprom.sw_region_offset +
				   TXGBE_EEPROM_CHECKSUM, &read_checksum);
	if (status != 0)
		return status;

	/* Verify read checksum from EEPROM is the same as
	 * calculated checksum
	 */
	if (read_checksum != checksum) {
		status = -EIO;
		wx_err(wx, "Invalid EEPROM checksum\n");
	}

	/* If the user cares, return the calculated checksum */
	if (checksum_val)
		*checksum_val = checksum;

	return status;
}

static void txgbe_reset_misc(struct wx *wx)
{
	wx_reset_misc(wx);
	txgbe_init_thermal_sensor_thresh(wx);
}

/**
 *  txgbe_reset_hw - Perform hardware reset
 *  @wx: pointer to wx structure
 *
 *  Resets the hardware by resetting the transmit and receive units, masks
 *  and clears all interrupts, perform a PHY reset, and perform a link (MAC)
 *  reset.
 **/
int txgbe_reset_hw(struct wx *wx)
{
	int status;

	/* Call adapter stop to disable tx/rx and clear interrupts */
	status = wx_stop_adapter(wx);
	if (status != 0)
		return status;

	if (wx->media_type != wx_media_copper) {
		u32 val;

Annotation

Implementation Notes