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net: phy: marvell: add SFP support for 88E1510 

Add support for SFP cages connected to the Marvell 88E1512 transceiver.
88E1512 supports for SGMII/1000Base-X/100Base-FX media type with RGMII
on system interface. Configure PHY to appropriate mode depending on the
type of SFP inserted. On SFP removal configure PHY to the RGMII-copper
mode so RJ-45 port can still work.

Signed-off-by: Ivan Bornyakov <i.bornyakov@metrotek.ru>
Link: https://lore.kernel.org/r/20210812134256.2436-1-i.bornyakov@metrotek.ru
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ivan Bornyakov 2021-08-12 16:42:56 +03:00 committed by Jakub Kicinski
parent a44fc4b6af
commit b697d9d38a
1 changed files with 104 additions and 1 deletions
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105
drivers/net/phy/marvell.c
View File

@ -32,6 +32,7 @@
#include <linux/marvell_phy.h>
#include <linux/bitfield.h>
#include <linux/of.h>
#include <linux/sfp.h>
#include <linux/io.h>
#include <asm/irq.h>
@ -46,6 +47,7 @@
#define MII_MARVELL_MISC_TEST_PAGE 0x06
#define MII_MARVELL_VCT7_PAGE 0x07
#define MII_MARVELL_WOL_PAGE 0x11
#define MII_MARVELL_MODE_PAGE 0x12
#define MII_M1011_IEVENT 0x13
#define MII_M1011_IEVENT_CLEAR 0x0000
@ -176,7 +178,14 @@
#define MII_88E1510_GEN_CTRL_REG_1 0x14
#define MII_88E1510_GEN_CTRL_REG_1_MODE_MASK 0x7
#define MII_88E1510_GEN_CTRL_REG_1_MODE_RGMII 0x0 /* RGMII to copper */
#define MII_88E1510_GEN_CTRL_REG_1_MODE_SGMII 0x1 /* SGMII to copper */
/* RGMII to 1000BASE-X */
#define MII_88E1510_GEN_CTRL_REG_1_MODE_RGMII_1000X 0x2
/* RGMII to 100BASE-FX */
#define MII_88E1510_GEN_CTRL_REG_1_MODE_RGMII_100FX 0x3
/* RGMII to SGMII */
#define MII_88E1510_GEN_CTRL_REG_1_MODE_RGMII_SGMII 0x4
#define MII_88E1510_GEN_CTRL_REG_1_RESET 0x8000 /* Soft reset */
#define MII_VCT5_TX_RX_MDI0_COUPLING 0x10
@ -2701,6 +2710,100 @@ static int marvell_probe(struct phy_device *phydev)
return marvell_hwmon_probe(phydev);
}
static int m88e1510_sfp_insert(void *upstream, const struct sfp_eeprom_id *id)
{
struct phy_device *phydev = upstream;
phy_interface_t interface;
struct device *dev;
int oldpage;
int ret = 0;
u16 mode;
__ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0, };
dev = &phydev->mdio.dev;
sfp_parse_support(phydev->sfp_bus, id, supported);
interface = sfp_select_interface(phydev->sfp_bus, supported);
dev_info(dev, "%s SFP module inserted\n", phy_modes(interface));
switch (interface) {
case PHY_INTERFACE_MODE_1000BASEX:
mode = MII_88E1510_GEN_CTRL_REG_1_MODE_RGMII_1000X;
break;
case PHY_INTERFACE_MODE_100BASEX:
mode = MII_88E1510_GEN_CTRL_REG_1_MODE_RGMII_100FX;
break;
case PHY_INTERFACE_MODE_SGMII:
mode = MII_88E1510_GEN_CTRL_REG_1_MODE_RGMII_SGMII;
break;
default:
dev_err(dev, "Incompatible SFP module inserted\n");
return -EINVAL;
}
oldpage = phy_select_page(phydev, MII_MARVELL_MODE_PAGE);
if (oldpage < 0)
goto error;
ret = __phy_modify(phydev, MII_88E1510_GEN_CTRL_REG_1,
MII_88E1510_GEN_CTRL_REG_1_MODE_MASK, mode);
if (ret < 0)
goto error;
ret = __phy_set_bits(phydev, MII_88E1510_GEN_CTRL_REG_1,
MII_88E1510_GEN_CTRL_REG_1_RESET);
error:
return phy_restore_page(phydev, oldpage, ret);
}
static void m88e1510_sfp_remove(void *upstream)
{
struct phy_device *phydev = upstream;
int oldpage;
int ret = 0;
oldpage = phy_select_page(phydev, MII_MARVELL_MODE_PAGE);
if (oldpage < 0)
goto error;
ret = __phy_modify(phydev, MII_88E1510_GEN_CTRL_REG_1,
MII_88E1510_GEN_CTRL_REG_1_MODE_MASK,
MII_88E1510_GEN_CTRL_REG_1_MODE_RGMII);
if (ret < 0)
goto error;
ret = __phy_set_bits(phydev, MII_88E1510_GEN_CTRL_REG_1,
MII_88E1510_GEN_CTRL_REG_1_RESET);
error:
phy_restore_page(phydev, oldpage, ret);
}
static const struct sfp_upstream_ops m88e1510_sfp_ops = {
.module_insert = m88e1510_sfp_insert,
.module_remove = m88e1510_sfp_remove,
.attach = phy_sfp_attach,
.detach = phy_sfp_detach,
};
static int m88e1510_probe(struct phy_device *phydev)
{
int err;
err = marvell_probe(phydev);
if (err)
return err;
return phy_sfp_probe(phydev, &m88e1510_sfp_ops);
}
static struct phy_driver marvell_drivers[] = {
{
.phy_id = MARVELL_PHY_ID_88E1101,
@ -2927,7 +3030,7 @@ static struct phy_driver marvell_drivers[] = {
.driver_data = DEF_MARVELL_HWMON_OPS(m88e1510_hwmon_ops),
.features = PHY_GBIT_FIBRE_FEATURES,
.flags = PHY_POLL_CABLE_TEST,
.probe = marvell_probe,
.probe = m88e1510_probe,
.config_init = m88e1510_config_init,
.config_aneg = m88e1510_config_aneg,
.read_status = marvell_read_status,