On some chips it is possible to access the switch eeprom.
Add infrastructure support for it.
Signed-off-by: Guenter Roeck <li...@roeck-us.net>
---
v3:
- Fix bug seen if devicetree is enabled; eeprom-length property is
attached to switch devicetree node, not to dsa node.
v2:
- Add support for configuring switch EEPROM size through platform data
or devicetree data
- Do not compare new pointers against NULL
- Check if get_eeprom pointer is set before calling it
include/net/dsa.h | 10 ++++++++++
net/dsa/dsa.c | 4 ++++
net/dsa/slave.c | 41 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 55 insertions(+)
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 55e75e7..37856a2 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -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);
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
index 5edbbca..b51ef592 100644
--- a/net/dsa/dsa.c
+++ b/net/dsa/dsa.c
@@ -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)
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 6d18174..ff2fbe7 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -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,
--
1.9.1
--
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