diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2018-08-08 15:38:55 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-08-10 00:15:00 +0300 |
| commit | 933de7866b57b2fc8adc160642a81f07175f138d (patch) | |
| tree | 426941763388190203f66173988ab92056d35f8e /drivers/net/dsa | |
| parent | cd16e5b233aadad5c4652f5466d1505a9f78bade (diff) | |
| download | linux-933de7866b57b2fc8adc160642a81f07175f138d.tar.xz | |
net: dsa: rtl8366rb: Support port 4 (WAN)
The totally undocumented IO mode needs to be set to enumerator
0 to enable port 4 also known as WAN in most configurations,
for ordinary traffic. The 3 bits in the register come up as
010 after reset, but need to be set to 000.
The Realtek source code contains a name for these bits, but
no explanation of what the 8 different IO modes may be.
Set it to zero for the time being and drop a comment so
people know what is going on if they run into trouble. This
"mode zero" works fine with the D-Link DIR-685 with
RTL8366RB.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa')
| -rw-r--r-- | drivers/net/dsa/rtl8366rb.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/net/dsa/rtl8366rb.c b/drivers/net/dsa/rtl8366rb.c index 1e55b9bf8b56..a4d5049df692 100644 --- a/drivers/net/dsa/rtl8366rb.c +++ b/drivers/net/dsa/rtl8366rb.c @@ -48,6 +48,23 @@ #define RTL8366RB_SSCR2 0x0004 #define RTL8366RB_SSCR2_DROP_UNKNOWN_DA BIT(0) +/* Port Mode Control registers */ +#define RTL8366RB_PMC0 0x0005 +#define RTL8366RB_PMC0_SPI BIT(0) +#define RTL8366RB_PMC0_EN_AUTOLOAD BIT(1) +#define RTL8366RB_PMC0_PROBE BIT(2) +#define RTL8366RB_PMC0_DIS_BISR BIT(3) +#define RTL8366RB_PMC0_ADCTEST BIT(4) +#define RTL8366RB_PMC0_SRAM_DIAG BIT(5) +#define RTL8366RB_PMC0_EN_SCAN BIT(6) +#define RTL8366RB_PMC0_P4_IOMODE_SHIFT 7 +#define RTL8366RB_PMC0_P4_IOMODE_MASK GENMASK(9, 7) +#define RTL8366RB_PMC0_P5_IOMODE_SHIFT 10 +#define RTL8366RB_PMC0_P5_IOMODE_MASK GENMASK(12, 10) +#define RTL8366RB_PMC0_SDSMODE_SHIFT 13 +#define RTL8366RB_PMC0_SDSMODE_MASK GENMASK(15, 13) +#define RTL8366RB_PMC1 0x0006 + /* Port Mirror Control Register */ #define RTL8366RB_PMCR 0x0007 #define RTL8366RB_PMCR_SOURCE_PORT(a) (a) @@ -860,6 +877,19 @@ static int rtl8366rb_setup(struct dsa_switch *ds) if (ret) return ret; + /* Port 4 setup: this enables Port 4, usually the WAN port, + * common PHY IO mode is apparently mode 0, and this is not what + * the port is initialized to. There is no explanation of the + * IO modes in the Realtek source code, if your WAN port is + * connected to something exotic such as fiber, then this might + * be worth experimenting with. + */ + ret = regmap_update_bits(smi->map, RTL8366RB_PMC0, + RTL8366RB_PMC0_P4_IOMODE_MASK, + 0 << RTL8366RB_PMC0_P4_IOMODE_SHIFT); + if (ret) + return ret; + /* Discard VLAN tagged packets if the port is not a member of * the VLAN with which the packets is associated. */ |