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realtek: Add SerDes access functions for RTL931X

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Adds RTL931X SerDes access functions as needed by the Ethernet driver.

Signed-off-by: Birger Koblitz <git@birger-koblitz.de>
This commit is contained in:
Birger Koblitz 2022-01-10 18:55:24 +01:00 committed by Daniel Golle
parent 6378d72ef6
commit 6b79484268
2 changed files with 52 additions and 0 deletions
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46
target/linux/realtek/files-5.10/drivers/net/phy/rtl83xx-phy.c
View File

@ -312,6 +312,52 @@ int rtl930x_write_sds_phy(int phy_addr, int page, int phy_reg, u16 v)
return 0;
}
int rtl931x_read_sds_phy(int phy_addr, int page, int phy_reg)
{
int i;
u32 cmd = phy_addr << 2 | page << 7 | phy_reg << 13 | 1;
pr_debug("%s: phy_addr(SDS-ID) %d, phy_reg: %d\n", __func__, phy_addr, phy_reg);
sw_w32(cmd, RTL931X_SERDES_INDRT_ACCESS_CTRL);
for (i = 0; i < 100; i++) {
if (!(sw_r32(RTL931X_SERDES_INDRT_ACCESS_CTRL) & 0x1))
break;
mdelay(1);
}
if (i >= 100)
return -EIO;
pr_debug("%s: returning %04x\n", __func__, sw_r32(RTL931X_SERDES_INDRT_DATA_CTRL) & 0xffff);
return sw_r32(RTL931X_SERDES_INDRT_DATA_CTRL) & 0xffff;
}
int rtl931x_write_sds_phy(int phy_addr, int page, int phy_reg, u16 v)
{
int i;
u32 cmd;
cmd = phy_addr << 2 | page << 7 | phy_reg << 13;
sw_w32(cmd, RTL931X_SERDES_INDRT_ACCESS_CTRL);
sw_w32(v, RTL931X_SERDES_INDRT_DATA_CTRL);
cmd = sw_r32(RTL931X_SERDES_INDRT_ACCESS_CTRL) | 0x3;
sw_w32(cmd, RTL931X_SERDES_INDRT_ACCESS_CTRL);
for (i = 0; i < 100; i++) {
if (!(sw_r32(RTL931X_SERDES_INDRT_ACCESS_CTRL) & 0x1))
break;
mdelay(1);
}
if (i >= 100)
return -EIO;
return 0;
}
/*
* On the RTL838x SoCs, the internal SerDes is accessed through direct access to
* standard PHY registers, where a 32 bit register holds a 16 bit word as found

6
target/linux/realtek/files-5.10/drivers/net/phy/rtl83xx-phy.h
View File

@ -58,3 +58,9 @@ struct __attribute__ ((__packed__)) fw_header {
/* Registers of the internal Serdes of the 9300 */
#define RTL930X_SDS_INDACS_CMD (0x03B0)
#define RTL930X_SDS_INDACS_DATA (0x03B4)
/*Registers of the internal SerDes of the 9310 */
#define RTL931X_SERDES_INDRT_ACCESS_CTRL (0x5638)
#define RTL931X_SERDES_INDRT_DATA_CTRL (0x563C)
#define RTL931X_SERDES_MODE_CTRL (0x13cc)
#define RTL931X_PS_SERDES_OFF_MODE_CTRL (0x13f4)