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| author | Birger Koblitz <git@birger-koblitz.de> | 2021-09-13 20:44:43 +0200 |
|---|---|---|
| committer | John Crispin <john@phrozen.org> | 2021-10-09 08:25:06 +0200 |
| commit | 76f60470a192f8ce585ac3289d3037b54d98ba11 (patch) | |
| tree | 2cbf40a6ff59d12dc3168cc0cf2314445e044143 | |
| parent | 88936e7e8278ef82c0937e47be6b4556b3ef708a (diff) | |
| download | upstream-76f60470a192f8ce585ac3289d3037b54d98ba11.tar.gz upstream-76f60470a192f8ce585ac3289d3037b54d98ba11.tar.bz2 upstream-76f60470a192f8ce585ac3289d3037b54d98ba11.zip | |
realtek: Fix bug when accessing external PHYs on SoCs older than Revision C
RTL8393 SoCs older than Revision C hang on accesses to PHYs with PHY address
larger or equal to the CPU-port (52). This will make scanning the MDIO bus
hang forever. Since the RTL8390 platform does not support more than
52 PHYs, return -EIO for phy addresses >= 52. Note that the RTL8390 family
of SoCs has a fixed mapping between port number and PHY-address.
Signed-off-by: Birger Koblitz <git@birger-koblitz.de>
| -rw-r--r-- | target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl839x.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl839x.c b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl839x.c index cca8824ce5..3c85e736c9 100644 --- a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl839x.c +++ b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl839x.c @@ -608,6 +608,10 @@ int rtl839x_read_phy(u32 port, u32 page, u32 reg, u32 *val) if (port > 63 || page > 4095 || reg > 31) return -ENOTSUPP; + // Take bug on RTL839x Rev <= C into account + if (port >= RTL839X_CPU_PORT) + return -EIO; + mutex_lock(&smi_lock); sw_w32_mask(0xffff0000, port << 16, RTL839X_PHYREG_DATA_CTRL); @@ -637,6 +641,10 @@ int rtl839x_write_phy(u32 port, u32 page, u32 reg, u32 val) if (port > 63 || page > 4095 || reg > 31) return -ENOTSUPP; + // Take bug on RTL839x Rev <= C into account + if (port >= RTL839X_CPU_PORT) + return -EIO; + mutex_lock(&smi_lock); // Set PHY to access @@ -670,6 +678,10 @@ int rtl839x_read_mmd_phy(u32 port, u32 devnum, u32 regnum, u32 *val) int err = 0; u32 v; + // Take bug on RTL839x Rev <= C into account + if (port >= RTL839X_CPU_PORT) + return -EIO; + mutex_lock(&smi_lock); // Set PHY to access @@ -701,6 +713,10 @@ int rtl839x_write_mmd_phy(u32 port, u32 devnum, u32 regnum, u32 val) int err = 0; u32 v; + // Take bug on RTL839x Rev <= C into account + if (port >= RTL839X_CPU_PORT) + return -EIO; + mutex_lock(&smi_lock); // Set PHY to access @@ -726,12 +742,15 @@ int rtl839x_write_mmd_phy(u32 port, u32 devnum, u32 regnum, u32 val) void rtl8390_get_version(struct rtl838x_switch_priv *priv) { - u32 info; + u32 info, model; sw_w32_mask(0xf << 28, 0xa << 28, RTL839X_CHIP_INFO); info = sw_r32(RTL839X_CHIP_INFO); - pr_debug("Chip-Info: %x\n", info); - priv->version = RTL8390_VERSION_A; + + model = sw_r32(RTL839X_MODEL_NAME_INFO); + priv->version = RTL8390_VERSION_A + ((model & 0x3f) >> 1); + + pr_info("RTL839X Chip-Info: %x, version %c\n", info, priv->version); } void rtl839x_vlan_profile_dump(int profile) |