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driver: net: ethernet: cpsw: dual emac interface implementation

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The CPSW switch can act as Dual EMAC by segregating the switch ports
using VLAN and port VLAN as per the TRM description in
14.3.2.10.2 Dual Mac Mode

Following CPSW components will be common for both the interfaces.
* Interrupt source is common for both eth interfaces
* Interrupt pacing is common for both interfaces
* Hardware statistics is common for all the ports
* CPDMA is common for both eth interface
* CPTS is common for both the interface and it should not be enabled on
  both the interface as timestamping information doesn't contain port
  information.

Constrains
* Reserved VID of One port should not be used in other interface which will
  enable switching functionality
* Same VID must not be used in both the interface which will enable switching
  functionality

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mugunthan V N
2013-02-11 09:52:20 +00:00
committed by David S. Miller
parent 9232b16df2
commit d9ba8f9e62
3 changed files with 288 additions and 52 deletions
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3
include/linux/platform_data/cpsw.h
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@@ -21,6 +21,8 @@ struct cpsw_slave_data {
char phy_id[MII_BUS_ID_SIZE];
int phy_if;
u8 mac_addr[ETH_ALEN];
u16 dual_emac_res_vlan; /* Reserved VLAN for DualEMAC */
};
struct cpsw_platform_data {
@@ -36,6 +38,7 @@ struct cpsw_platform_data {
u32 rx_descs; /* Number of Rx Descriptios */
u32 mac_control; /* Mac control register */
u16 default_vlan; /* Def VLAN for ALE lookup in VLAN aware mode*/
bool dual_emac; /* Enable Dual EMAC mode */
};
#endif /* __CPSW_H__ */