Commit 6793abb4 authored by Guenter Roeck's avatar Guenter Roeck Committed by David S. Miller
Browse files

net: dsa: Add support for switch EEPROM access 



On some chips it is possible to access the switch eeprom.
Add infrastructure support for it.

Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 87e5f66b

include/net/dsa.h

+10 −0
Original line number Diff line number Diff line
@@ -38,6 +38,9 @@ struct dsa_chip_data { 
	struct device	*host_dev;

	int		sw_addr;



	/* set to size of eeprom if supported by the switch */

	int		eeprom_len;



	/* Device tree node pointer for this specific switch chip

	 * used during switch setup in case additional properties

	 * and resources needs to be used
@@ -258,6 +261,13 @@ struct dsa_switch_driver { 
	int	(*set_temp_limit)(struct dsa_switch *ds, int temp);

	int	(*get_temp_alarm)(struct dsa_switch *ds, bool *alarm);

#endif



	/* EEPROM access */

	int	(*get_eeprom_len)(struct dsa_switch *ds);

	int	(*get_eeprom)(struct dsa_switch *ds,

			      struct ethtool_eeprom *eeprom, u8 *data);

	int	(*set_eeprom)(struct dsa_switch *ds,

			      struct ethtool_eeprom *eeprom, u8 *data);

};



void register_switch_driver(struct dsa_switch_driver *type);

net/dsa/dsa.c

+4 −0
Original line number Diff line number Diff line
@@ -575,6 +575,7 @@ static int dsa_of_probe(struct platform_device *pdev) 
	const char *port_name;

	int chip_index, port_index;

	const unsigned int *sw_addr, *port_reg;

	u32 eeprom_len;

	int ret;



	mdio = of_parse_phandle(np, "dsa,mii-bus", 0);
@@ -626,6 +627,9 @@ static int dsa_of_probe(struct platform_device *pdev) 
		if (cd->sw_addr > PHY_MAX_ADDR)

			continue;



		if (!of_property_read_u32(np, "eeprom-length", &eeprom_len))

			cd->eeprom_len = eeprom_len;



		for_each_available_child_of_node(child, port) {

			port_reg = of_get_property(port, "reg", NULL);

			if (!port_reg)

net/dsa/slave.c

+41 −0
Original line number Diff line number Diff line
@@ -271,6 +271,44 @@ static u32 dsa_slave_get_link(struct net_device *dev) 
	return -EOPNOTSUPP;

}



static int dsa_slave_get_eeprom_len(struct net_device *dev)

{

	struct dsa_slave_priv *p = netdev_priv(dev);

	struct dsa_switch *ds = p->parent;



	if (ds->pd->eeprom_len)

		return ds->pd->eeprom_len;



	if (ds->drv->get_eeprom_len)

		return ds->drv->get_eeprom_len(ds);



	return 0;

}



static int dsa_slave_get_eeprom(struct net_device *dev,

				struct ethtool_eeprom *eeprom, u8 *data)

{

	struct dsa_slave_priv *p = netdev_priv(dev);

	struct dsa_switch *ds = p->parent;



	if (ds->drv->get_eeprom)

		return ds->drv->get_eeprom(ds, eeprom, data);



	return -EOPNOTSUPP;

}



static int dsa_slave_set_eeprom(struct net_device *dev,

				struct ethtool_eeprom *eeprom, u8 *data)

{

	struct dsa_slave_priv *p = netdev_priv(dev);

	struct dsa_switch *ds = p->parent;



	if (ds->drv->set_eeprom)

		return ds->drv->set_eeprom(ds, eeprom, data);



	return -EOPNOTSUPP;

}



static void dsa_slave_get_strings(struct net_device *dev,

				  uint32_t stringset, uint8_t *data)

{
@@ -387,6 +425,9 @@ static const struct ethtool_ops dsa_slave_ethtool_ops = { 
	.get_drvinfo		= dsa_slave_get_drvinfo,

	.nway_reset		= dsa_slave_nway_reset,

	.get_link		= dsa_slave_get_link,

	.get_eeprom_len		= dsa_slave_get_eeprom_len,

	.get_eeprom		= dsa_slave_get_eeprom,

	.set_eeprom		= dsa_slave_set_eeprom,

	.get_strings		= dsa_slave_get_strings,

	.get_ethtool_stats	= dsa_slave_get_ethtool_stats,

	.get_sset_count		= dsa_slave_get_sset_count,