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net: dsa: realtek-smi: fix indirect reg access for ports>3

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This switch family can have up to 8 UTP ports {0..7}. However,
INDIRECT_ACCESS_ADDRESS_PHYNUM_MASK was using 2 bits instead of 3,
dropping the most significant bit during indirect register reads and
writes. Reading or writing ports 4, 5, 6, and 7 registers was actually
manipulating, respectively, ports 0, 1, 2, and 3 registers.

This is not sufficient but necessary to support any variant with more
than 4 UTP ports, like RTL8367S.

rtl8365mb_phy_{read,write} will now returns -EINVAL if phy is greater
than 7.

Fixes: 4af2950c50 ("net: dsa: realtek-smi: add rtl8365mb subdriver for RTL8365MB-VC")
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Luiz Angelo Daros de Luca 2021-11-26 17:13:55 -03:00 committed by David S. Miller
parent dacb5d8875
commit 1e89ad864d
1 changed files with 8 additions and 1 deletions
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9
drivers/net/dsa/rtl8365mb.c
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@ -107,6 +107,7 @@
#define RTL8365MB_LEARN_LIMIT_MAX_8365MB_VC 2112
/* Family-specific data and limits */
#define RTL8365MB_PHYADDRMAX 7
#define RTL8365MB_NUM_PHYREGS 32
#define RTL8365MB_PHYREGMAX (RTL8365MB_NUM_PHYREGS - 1)
#define RTL8365MB_MAX_NUM_PORTS (RTL8365MB_CPU_PORT_NUM_8365MB_VC + 1)
@ -176,7 +177,7 @@
#define RTL8365MB_INDIRECT_ACCESS_STATUS_REG 0x1F01
#define RTL8365MB_INDIRECT_ACCESS_ADDRESS_REG 0x1F02
#define RTL8365MB_INDIRECT_ACCESS_ADDRESS_OCPADR_5_1_MASK GENMASK(4, 0)
#define RTL8365MB_INDIRECT_ACCESS_ADDRESS_PHYNUM_MASK GENMASK(6, 5)
#define RTL8365MB_INDIRECT_ACCESS_ADDRESS_PHYNUM_MASK GENMASK(7, 5)
#define RTL8365MB_INDIRECT_ACCESS_ADDRESS_OCPADR_9_6_MASK GENMASK(11, 8)
#define RTL8365MB_PHY_BASE 0x2000
#define RTL8365MB_INDIRECT_ACCESS_WRITE_DATA_REG 0x1F03
@ -679,6 +680,9 @@ static int rtl8365mb_phy_read(struct realtek_smi *smi, int phy, int regnum)
u16 val;
int ret;
if (phy > RTL8365MB_PHYADDRMAX)
return -EINVAL;
if (regnum > RTL8365MB_PHYREGMAX)
return -EINVAL;
@ -704,6 +708,9 @@ static int rtl8365mb_phy_write(struct realtek_smi *smi, int phy, int regnum,
u32 ocp_addr;
int ret;
if (phy > RTL8365MB_PHYADDRMAX)
return -EINVAL;
if (regnum > RTL8365MB_PHYREGMAX)
return -EINVAL;