[PATCH] net: phy: add Marvell 88X2222 transceiver support
From: Ivan Bornyakov
Date: Mon Feb 01 2021 - 14:56:34 EST
Add basic support for the Marvell 88X2222 multi-speed ethernet
transceiver.
This PHY provides data transmission over fiber-optic as well as Twinax
copper links. The 88X2222 supports 2 ports of 10GBase-R and 1000Base-X
on the line-side interface. The host-side interface supports 4 ports of
10GBase-R, RXAUI, 1000Base-X and 2 ports of XAUI.
This driver, however, supports only XAUI on the host-side and
1000Base-X/10GBase-R on the line-side, for now. Interrupts are not
supported also.
Internal registers access compliant with the Clause 45 specification.
Signed-off-by: Ivan Bornyakov <i.bornyakov@xxxxxxxxxxx>
---
drivers/net/phy/Kconfig | 6 +
drivers/net/phy/Makefile | 1 +
drivers/net/phy/marvell-88x2222.c | 480 ++++++++++++++++++++++++++++++
include/linux/marvell_phy.h | 1 +
4 files changed, 488 insertions(+)
create mode 100644 drivers/net/phy/marvell-88x2222.c
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 698bea312adc..a615b3660b05 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -201,6 +201,12 @@ config MARVELL_10G_PHY
help
Support for the Marvell Alaska MV88X3310 and compatible PHYs.
+config MARVELL_88X2222_PHY
+ tristate "Marvell 88X2222 PHY"
+ help
+ Support for the Marvell 88X2222 Dual-port Multi-speed Ethernet
+ Transceiver.
+
config MICREL_PHY
tristate "Micrel PHYs"
help
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index a13e402074cf..de683e3abe63 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -63,6 +63,7 @@ obj-$(CONFIG_LSI_ET1011C_PHY) += et1011c.o
obj-$(CONFIG_LXT_PHY) += lxt.o
obj-$(CONFIG_MARVELL_10G_PHY) += marvell10g.o
obj-$(CONFIG_MARVELL_PHY) += marvell.o
+obj-$(CONFIG_MARVELL_88X2222_PHY) += marvell-88x2222.o
obj-$(CONFIG_MESON_GXL_PHY) += meson-gxl.o
obj-$(CONFIG_MICREL_KS8995MA) += spi_ks8995.o
obj-$(CONFIG_MICREL_PHY) += micrel.o
diff --git a/drivers/net/phy/marvell-88x2222.c b/drivers/net/phy/marvell-88x2222.c
new file mode 100644
index 000000000000..e2c55db4769f
--- /dev/null
+++ b/drivers/net/phy/marvell-88x2222.c
@@ -0,0 +1,480 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Marvell 88x2222 dual-port multi-speed ethernet transceiver.
+ *
+ * Supports:
+ * XAUI on the host side.
+ * 1000Base-X or 10GBase-R on the line side.
+ */
+#include <linux/module.h>
+#include <linux/phy.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/mdio.h>
+#include <linux/marvell_phy.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/sfp.h>
+#include <linux/netdevice.h>
+
+/* Port PCS Configuration */
+#define MV_PCS_CONFIG 0xF002
+#define MV_PCS_HOST_XAUI 0x73
+#define MV_PCS_LINE_10GBR (0x71 << 8)
+#define MV_PCS_LINE_1GBX_AN (0x7B << 8)
+
+/* Port Reset and Power Down */
+#define MV_PORT_RST 0xF003
+#define MV_LINE_RST_SW BIT(15)
+#define MV_HOST_RST_SW BIT(7)
+#define MV_PORT_RST_SW (MV_LINE_RST_SW | MV_HOST_RST_SW)
+
+/* LED0 Control */
+#define MV_LED0_CTRL 0xF020
+#define MV_LED0_SOLID_MASK (0xf << 4)
+#define MV_LED0_SOLID_OFF (0x0 << 4)
+#define MV_LED0_SOLID_ON (0x7 << 4)
+
+/* PMD Transmit Disable */
+#define MV_TX_DISABLE 0x0009
+#define MV_TX_DISABLE_GLOBAL BIT(0)
+
+/* 10GBASE-R PCS Status 1 */
+#define MV_10GBR_STAT MDIO_STAT1
+
+/* 10GBASE-R PCS Real Time Status Register */
+#define MV_10GBR_STAT_RT 0x8002
+
+/* 1000Base-X/SGMII Control Register */
+#define MV_1GBX_CTRL 0x2000
+
+/* 1000BASE-X/SGMII Status Register */
+#define MV_1GBX_STAT 0x2001
+
+/* 1000Base-X Auto-Negotiation Advertisement Register */
+#define MV_1GBX_ADVERTISE 0x2004
+
+/* 1000Base-X PHY Specific Status Register */
+#define MV_1GBX_PHY_STAT 0xA003
+#define MV_1GBX_PHY_STAT_LSTATUS_RT BIT(10)
+#define MV_1GBX_PHY_STAT_AN_RESOLVED BIT(11)
+#define MV_1GBX_PHY_STAT_DUPLEX BIT(13)
+#define MV_1GBX_PHY_STAT_SPEED100 BIT(14)
+#define MV_1GBX_PHY_STAT_SPEED1000 BIT(15)
+
+struct mv2222_data {
+ bool sfp_inserted;
+ bool net_up;
+};
+
+/* SFI PMA transmit enable */
+static void mv2222_tx_enable(struct phy_device *phydev)
+{
+ phy_clear_bits_mmd(phydev, MDIO_MMD_PMAPMD, MV_TX_DISABLE,
+ MV_TX_DISABLE_GLOBAL);
+}
+
+/* SFI PMA transmit disable */
+static void mv2222_tx_disable(struct phy_device *phydev)
+{
+ phy_set_bits_mmd(phydev, MDIO_MMD_PMAPMD, MV_TX_DISABLE,
+ MV_TX_DISABLE_GLOBAL);
+}
+
+static void mv2222_link_led_on(struct phy_device *phydev)
+{
+ phy_modify_mmd(phydev, MDIO_MMD_VEND2, MV_LED0_CTRL, MV_LED0_SOLID_MASK,
+ MV_LED0_SOLID_ON);
+}
+
+static void mv2222_link_led_off(struct phy_device *phydev)
+{
+ phy_modify_mmd(phydev, MDIO_MMD_VEND2, MV_LED0_CTRL, MV_LED0_SOLID_MASK,
+ MV_LED0_SOLID_OFF);
+}
+
+static int mv2222_soft_reset(struct phy_device *phydev)
+{
+ int ret = phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PORT_RST, MV_PORT_RST_SW);
+
+ msleep(2000);
+
+ return ret;
+}
+
+static int sfp_module_insert(void *_priv, const struct sfp_eeprom_id *id)
+{
+ struct phy_device *phydev = _priv;
+ struct device *dev = &phydev->mdio.dev;
+ struct mv2222_data *priv = phydev->priv;
+ phy_interface_t interface;
+
+ __ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0, };
+
+ sfp_parse_support(phydev->sfp_bus, id, supported);
+ interface = sfp_select_interface(phydev->sfp_bus, supported);
+
+ dev_info(dev, "%s SFP module inserted", phy_modes(interface));
+
+ switch (interface) {
+ case PHY_INTERFACE_MODE_10GBASER:
+ phydev->speed = SPEED_10000;
+ phydev->interface = PHY_INTERFACE_MODE_10GBASER;
+ linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
+ phydev->supported);
+
+ phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PCS_CONFIG,
+ MV_PCS_HOST_XAUI | MV_PCS_LINE_10GBR);
+ mv2222_soft_reset(phydev);
+ break;
+ case PHY_INTERFACE_MODE_1000BASEX:
+ default:
+ phydev->speed = SPEED_1000;
+ phydev->interface = PHY_INTERFACE_MODE_1000BASEX;
+ linkmode_clear_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
+ phydev->supported);
+
+ phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PCS_CONFIG,
+ MV_PCS_HOST_XAUI | MV_PCS_LINE_1GBX_AN);
+ mv2222_soft_reset(phydev);
+ }
+
+ priv->sfp_inserted = true;
+
+ if (priv->net_up)
+ mv2222_tx_enable(phydev);
+
+ return 0;
+}
+
+static void sfp_module_remove(void *_priv)
+{
+ struct phy_device *phydev = _priv;
+ struct mv2222_data *priv = phydev->priv;
+
+ priv->sfp_inserted = false;
+ mv2222_tx_disable(phydev);
+}
+
+static const struct sfp_upstream_ops sfp_phy_ops = {
+ .module_insert = sfp_module_insert,
+ .module_remove = sfp_module_remove,
+ .attach = phy_sfp_attach,
+ .detach = phy_sfp_detach,
+};
+
+static int mv2222_config_init(struct phy_device *phydev)
+{
+ linkmode_zero(phydev->supported);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, phydev->supported);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, phydev->supported);
+
+ phydev->pause = 0;
+ phydev->asym_pause = 0;
+ phydev->duplex = DUPLEX_FULL;
+ phydev->autoneg = AUTONEG_DISABLE;
+
+ return 0;
+}
+
+static void mv2222_update_interface(struct phy_device *phydev)
+{
+ if ((phydev->speed == SPEED_1000 ||
+ phydev->speed == SPEED_100 ||
+ phydev->speed == SPEED_10) &&
+ phydev->interface != PHY_INTERFACE_MODE_1000BASEX) {
+ phydev->interface = PHY_INTERFACE_MODE_1000BASEX;
+
+ phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PCS_CONFIG,
+ MV_PCS_HOST_XAUI | MV_PCS_LINE_1GBX_AN);
+ mv2222_soft_reset(phydev);
+ } else if (phydev->speed == SPEED_10000 &&
+ phydev->interface != PHY_INTERFACE_MODE_10GBASER) {
+ phydev->interface = PHY_INTERFACE_MODE_10GBASER;
+
+ phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PCS_CONFIG,
+ MV_PCS_HOST_XAUI | MV_PCS_LINE_10GBR);
+ mv2222_soft_reset(phydev);
+ }
+}
+
+/* Returns negative on error, 0 if link is down, 1 if link is up */
+static int mv2222_read_status_10g(struct phy_device *phydev)
+{
+ int val, link = 0;
+
+ val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_10GBR_STAT);
+ if (val < 0)
+ return val;
+
+ if (val & MDIO_STAT1_LSTATUS) {
+ link = 1;
+
+ /* 10GBASE-R do not support auto-negotiation */
+ phydev->autoneg = AUTONEG_DISABLE;
+ phydev->speed = SPEED_10000;
+ phydev->duplex = DUPLEX_FULL;
+ }
+
+ return link;
+}
+
+/* Returns negative on error, 0 if link is down, 1 if link is up */
+static int mv2222_read_status_1g(struct phy_device *phydev)
+{
+ int val, link = 0;
+
+ val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_STAT);
+ if (val < 0)
+ return val;
+
+ if (!(val & MDIO_STAT1_LSTATUS) ||
+ (phydev->autoneg == AUTONEG_ENABLE && !(val & MDIO_AN_STAT1_COMPLETE)))
+ return 0;
+
+ link = 1;
+
+ if (phydev->autoneg == AUTONEG_DISABLE) {
+ phydev->speed = SPEED_1000;
+ phydev->duplex = DUPLEX_FULL;
+
+ return link;
+ }
+
+ val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_PHY_STAT);
+ if (val < 0)
+ return val;
+
+ if (val & MV_1GBX_PHY_STAT_AN_RESOLVED) {
+ if (val & MV_1GBX_PHY_STAT_DUPLEX)
+ phydev->duplex = DUPLEX_FULL;
+ else
+ phydev->duplex = DUPLEX_HALF;
+
+ if (val & MV_1GBX_PHY_STAT_SPEED1000)
+ phydev->speed = SPEED_1000;
+ else if (val & MV_1GBX_PHY_STAT_SPEED100)
+ phydev->speed = SPEED_100;
+ else
+ phydev->speed = SPEED_10;
+ } else {
+ phydev->duplex = DUPLEX_UNKNOWN;
+ phydev->speed = SPEED_UNKNOWN;
+ }
+
+ return link;
+}
+
+static int mv2222_read_status(struct phy_device *phydev)
+{
+ int link;
+
+ linkmode_zero(phydev->lp_advertising);
+ phydev->pause = 0;
+ phydev->asym_pause = 0;
+
+ switch (phydev->interface) {
+ case PHY_INTERFACE_MODE_10GBASER:
+ link = mv2222_read_status_10g(phydev);
+ break;
+ case PHY_INTERFACE_MODE_1000BASEX:
+ default:
+ link = mv2222_read_status_1g(phydev);
+ break;
+ }
+
+ if (link < 0)
+ return link;
+
+ phydev->link = link;
+
+ if (phydev->link)
+ mv2222_link_led_on(phydev);
+ else
+ mv2222_link_led_off(phydev);
+
+ return 0;
+}
+
+static int mv2222_disable_aneg(struct phy_device *phydev)
+{
+ return phy_clear_bits_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_CTRL,
+ MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART);
+}
+
+static int mv2222_enable_aneg(struct phy_device *phydev)
+{
+ return phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_CTRL,
+ MDIO_AN_CTRL1_ENABLE | MDIO_CTRL1_RESET);
+}
+
+static int mv2222_config_aneg(struct phy_device *phydev)
+{
+ int ret, adv;
+
+ if (phydev->autoneg == AUTONEG_DISABLE ||
+ phydev->speed == SPEED_10000) {
+ if (phydev->speed == SPEED_10000 &&
+ !linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
+ phydev->supported))
+ return -EINVAL;
+
+ /* Link partner advertising modes */
+ linkmode_copy(phydev->advertising, phydev->supported);
+
+ mv2222_update_interface(phydev);
+
+ return mv2222_disable_aneg(phydev);
+ }
+
+ /* Try 10G first */
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
+ phydev->supported)) {
+ phydev->speed = SPEED_10000;
+ mv2222_update_interface(phydev);
+
+ ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_10GBR_STAT_RT);
+ if (ret < 0)
+ return ret;
+
+ if (ret & MDIO_STAT1_LSTATUS) {
+ phydev->autoneg = AUTONEG_DISABLE;
+ linkmode_copy(phydev->advertising, phydev->supported);
+
+ return mv2222_disable_aneg(phydev);
+ } else {
+ phydev->speed = SPEED_1000;
+ mv2222_update_interface(phydev);
+ }
+ }
+
+ adv = 0;
+ linkmode_zero(phydev->advertising);
+
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
+ phydev->supported)) {
+ adv |= ADVERTISE_1000XFULL;
+ linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
+ phydev->advertising);
+ }
+
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+ phydev->supported)) {
+ adv |= ADVERTISE_1000XPAUSE;
+ linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+ phydev->advertising);
+ }
+
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+ phydev->supported)) {
+ adv |= ADVERTISE_1000XPSE_ASYM;
+ linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+ phydev->advertising);
+ }
+
+ ret = phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_ADVERTISE,
+ ADVERTISE_1000XFULL |
+ ADVERTISE_1000XPAUSE | ADVERTISE_1000XPSE_ASYM,
+ adv);
+ if (ret < 0)
+ return ret;
+
+ return mv2222_enable_aneg(phydev);
+}
+
+static int mv2222_aneg_done(struct phy_device *phydev)
+{
+ int ret;
+
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
+ phydev->supported)) {
+ ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_10GBR_STAT);
+ if (ret < 0)
+ return ret;
+
+ if (ret & MDIO_STAT1_LSTATUS)
+ return 1;
+ }
+
+ ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_STAT);
+ if (ret < 0)
+ return ret;
+
+ return (ret & MDIO_AN_STAT1_COMPLETE);
+}
+
+static int mv2222_resume(struct phy_device *phydev)
+{
+ struct mv2222_data *priv = phydev->priv;
+
+ priv->net_up = true;
+
+ if (priv->sfp_inserted)
+ mv2222_tx_enable(phydev);
+
+ return 0;
+}
+
+static int mv2222_suspend(struct phy_device *phydev)
+{
+ struct mv2222_data *priv = phydev->priv;
+
+ priv->net_up = false;
+ mv2222_tx_disable(phydev);
+ mv2222_link_led_off(phydev);
+
+ return 0;
+}
+
+static int mv2222_probe(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ struct mv2222_data *priv = NULL;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ phydev->priv = priv;
+
+ return phy_sfp_probe(phydev, &sfp_phy_ops);
+}
+
+static void mv2222_remove(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ struct mv2222_data *priv = phydev->priv;
+
+ if (priv)
+ devm_kfree(dev, priv);
+}
+
+static struct phy_driver mv2222_drivers[] = {
+ {
+ .phy_id = MARVELL_PHY_ID_88X2222,
+ .phy_id_mask = MARVELL_PHY_ID_MASK,
+ .name = "Marvell 88X2222",
+ .soft_reset = mv2222_soft_reset,
+ .config_init = mv2222_config_init,
+ .config_aneg = mv2222_config_aneg,
+ .aneg_done = mv2222_aneg_done,
+ .probe = mv2222_probe,
+ .remove = mv2222_remove,
+ .suspend = mv2222_suspend,
+ .resume = mv2222_resume,
+ .read_status = mv2222_read_status,
+ },
+};
+module_phy_driver(mv2222_drivers);
+
+static struct mdio_device_id __maybe_unused mv2222_tbl[] = {
+ { MARVELL_PHY_ID_88X2222, MARVELL_PHY_ID_MASK },
+ { }
+};
+MODULE_DEVICE_TABLE(mdio, mv2222_tbl);
+
+MODULE_DESCRIPTION("Marvell 88x2222 ethernet transceiver driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/marvell_phy.h b/include/linux/marvell_phy.h
index 52b1610eae68..274abd5fbac3 100644
--- a/include/linux/marvell_phy.h
+++ b/include/linux/marvell_phy.h
@@ -24,6 +24,7 @@
#define MARVELL_PHY_ID_88E3016 0x01410e60
#define MARVELL_PHY_ID_88X3310 0x002b09a0
#define MARVELL_PHY_ID_88E2110 0x002b09b0
+#define MARVELL_PHY_ID_88X2222 0x01410f10
/* Marvel 88E1111 in Finisar SFP module with modified PHY ID */
#define MARVELL_PHY_ID_88E1111_FINISAR 0x01ff0cc0
--
2.20.1