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net: dsa: lan9303: Move tag setup to new lan9303_setup_tagging

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Prepare for next patch:
Move tag setup from lan9303_separate_ports() to new function
lan9303_setup_tagging()

Signed-off-by: Egil Hjelmeland <privat@egil-hjelmeland.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Egil Hjelmeland 2017-10-10 14:49:52 +02:00 committed by David S. Miller
parent 4a269818a7
commit f7e3bfa14d
1 changed files with 25 additions and 17 deletions
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42
drivers/net/dsa/lan9303-core.c
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@ -157,6 +157,7 @@
# define LAN9303_SWE_PORT_MIRROR_ENABLE_RX_MIRRORING BIT(1)
# define LAN9303_SWE_PORT_MIRROR_ENABLE_TX_MIRRORING BIT(0)
#define LAN9303_SWE_INGRESS_PORT_TYPE 0x1847
#define LAN9303_SWE_INGRESS_PORT_TYPE_VLAN 3
#define LAN9303_BM_CFG 0x1c00
#define LAN9303_BM_EGRSS_PORT_TYPE 0x1c0c
# define LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT2 (BIT(17) | BIT(16))
@ -510,11 +511,30 @@ static int lan9303_enable_processing_port(struct lan9303 *chip,
LAN9303_MAC_TX_CFG_X_TX_ENABLE);
}
/* forward special tagged packets from port 0 to port 1 *or* port 2 */
static int lan9303_setup_tagging(struct lan9303 *chip)
{
int ret;
u32 val;
/* enable defining the destination port via special VLAN tagging
* for port 0
*/
ret = lan9303_write_switch_reg(chip, LAN9303_SWE_INGRESS_PORT_TYPE,
LAN9303_SWE_INGRESS_PORT_TYPE_VLAN);
if (ret)
return ret;
/* tag incoming packets at port 1 and 2 on their way to port 0 to be
* able to discover their source port
*/
val = LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT0;
return lan9303_write_switch_reg(chip, LAN9303_BM_EGRSS_PORT_TYPE, val);
}
/* We want a special working switch:
* - do not forward packets between port 1 and 2
* - forward everything from port 1 to port 0
* - forward everything from port 2 to port 0
* - forward special tagged packets from port 0 to port 1 *or* port 2
*/
static int lan9303_separate_ports(struct lan9303 *chip)
{
@ -529,22 +549,6 @@ static int lan9303_separate_ports(struct lan9303 *chip)
if (ret)
return ret;
/* enable defining the destination port via special VLAN tagging
* for port 0
*/
ret = lan9303_write_switch_reg(chip, LAN9303_SWE_INGRESS_PORT_TYPE,
0x03);
if (ret)
return ret;
/* tag incoming packets at port 1 and 2 on their way to port 0 to be
* able to discover their source port
*/
ret = lan9303_write_switch_reg(chip, LAN9303_BM_EGRSS_PORT_TYPE,
LAN9303_BM_EGRSS_PORT_TYPE_SPECIAL_TAG_PORT0);
if (ret)
return ret;
/* prevent port 1 and 2 from forwarding packets by their own */
return lan9303_write_switch_reg(chip, LAN9303_SWE_PORT_STATE,
LAN9303_SWE_PORT_STATE_FORWARDING_PORT0 |
@ -644,6 +648,10 @@ static int lan9303_setup(struct dsa_switch *ds)
return -EINVAL;
}
ret = lan9303_setup_tagging(chip);
if (ret)
dev_err(chip->dev, "failed to setup port tagging %d\n", ret);
ret = lan9303_separate_ports(chip);
if (ret)
dev_err(chip->dev, "failed to separate ports %d\n", ret);