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net: dsa: microchip: ksz9477: setup single-led mode (dirty)

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Signed-off-by: Heinrich Toews <ht@twx-software.de>
This commit is contained in:
Heinrich Toews 2025-11-03 14:21:20 +01:00
parent 3c892fb041
commit 7a999a818a
1 changed files with 57 additions and 0 deletions
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57
drivers/net/dsa/microchip/ksz9477.c
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@ -174,6 +174,7 @@ int ksz9477_reset_switch(struct ksz_device *dev)
SPI_AUTO_EDGE_DETECTION, 0);
/* default configuration */
/* TWx: REG_SW_LUE_CTRL_1 = Switch Lookup Engine Control 1 Register */
ksz_write8(dev, REG_SW_LUE_CTRL_1,
SW_AGING_ENABLE | SW_LINK_AUTO_AGING | SW_SRC_ADDR_FILTER);
@ -195,6 +196,62 @@ int ksz9477_reset_switch(struct ksz_device *dev)
data8 = SW_ENABLE_REFCLKO | SW_REFCLKO_IS_125MHZ;
ksz_write8(dev, REG_SW_GLOBAL_OUTPUT_CTRL__1, data8);
{
u16 data16;
/* REGS
*
* Write MMD - Device Address 2h, Register 00h = 0010h to enable single-LED mode.
*
* REG_PORT_PHY_MMD_SETUP - Write the PHY MMD Setup Register with 0002h
* REG_PORT_PHY_MMD_INDEX_DATA - Write the PHY MMD Data Register with 0000h
* - Write the PHY MMD Setup Register with 4002h
* - Write the PHY MMD Data Register with 0010h
*
*
*/
/* WRITE */
for (int i = 1; i <= 5; i++) {
/* skip EM port 3(4) */
if (i == 4)
continue;
/* Read <MMD LED Mode Register> for Port i */
ksz_write16(dev, REG_PORT_PHY_MMD_SETUP |
(i << 12), 0x0002);
ksz_write16(dev, REG_PORT_PHY_MMD_INDEX_DATA |
(i << 12), 0x0000);
ksz_write16(dev, REG_PORT_PHY_MMD_SETUP |
(i << 12), 0x4002);
ksz_write16(dev, REG_PORT_PHY_MMD_INDEX_DATA |
(i << 12), 0x0011);
/* Due to Errata Module 19 this workaround is needed to
* enable single-led mode. It has also to be a 32bit
* write.
*/
ksz_write32(dev, REG_PORT_PHY_DIGITAL_DEBUG_3 |
(i << 12), 0xfa000300);
pr_info("TWx %s:%d - Port %d: Wrote MMD LED Mode Register: 0x%x\n.",
__func__, __LINE__, i, 0x0011);
}
/* READ */
for (int i = 1; i <= 5; i++) {
/* Read <MMD LED Mode Register> for Port i */
ksz_write16(dev, REG_PORT_PHY_MMD_SETUP | (i << 12), 0x0002);
ksz_write16(dev, REG_PORT_PHY_MMD_INDEX_DATA | (i << 12), 0x0000);
ksz_write16(dev, REG_PORT_PHY_MMD_SETUP | (i << 12), 0x4002);
ksz_read16(dev, REG_PORT_PHY_MMD_INDEX_DATA | (i << 12), &data16);
pr_info("TWx %s:%d - Port %d: MMD LED Mode Register: 0x%x\n.",
__func__, __LINE__, i, data16);
}
}
return 0;
}