[PATCH v9 7/8] net: add MV88E6xxx DSA driver

Add a DSA driver for the MV88E6xxx compatible Ethernet switches.

Cc: Marek Behún marek.behun@nic.cz Cc: Vladimir Oltean vladimir.oltean@nxp.com Signed-off-by: Tim Harvey tharvey@gateworks.com Reviewed-by: Vladimir Oltean vladimir.oltean@nxp.com Reviewed-by: Fabio Estevam festevam@denx.de --- v9: - no changes

v8: - remove energy-detect low-power mode config

v7: - rebase on master - update commit short msg (s/MV88E61xx/MV88E6xxx) - replace inline smi_cmd* with macros using logical operators - replace bitfield_replace with logical operators for readibility - removed some unused register definitions - config switch based SERDES mode once in probe vs port_enable - rework port_enable to clean up and: - enable energy-detect for all non fixed PHY ports - configure RGMII delays based on interface type

v6: - update commit msg (s/MV88E61xx/MV88E6xxx) - remove GbE from commit msg and Kconfig desc - squash accidental change from patch 7 into patch 6 - added error print on failure to read switch id - mv88e6xxx_probe: - check for switch enabled - remove unused variable enabled - remove unnecessary call to dsa_set_tagging - port_probe: - new function to configure phy features by calling phy_config - port_enable: - only enable energy-detect sensing on phy ports - add phy/cmode verification mistmatch warning - remove mv88e6xxx_fixed_port_setup() - always force link up for fixed ports - always set SERDES mode regardless of cpu port - remove unnecessary setting of CPUDEST - port_disable: - remove pointless error check - removed unnecessary priv data for mdio controller - fix indentation - change variable name for clarity

v5: - added support for MV88E6320 - added Fabio's rb tag

v4: - rename to mv88e6xxx - sort includes alphabetically - remove dsa term from function names - reduce indentation level and remove unecessary code in of probe_mdio function - rename pdev to mdev to represent mdio device

v3: - Added Vladimir's rb tag

v2: - rebase on v2022.07-rc1 (use ofnode_get_phy_node) - remove unused commented out fields from struct - remove unused PORT_MASK macro - remove phy from priv struct name - refactor code from original drivers/net/phy/mv88e61xx with suggestions from review to consolidate some functions into mv88e61xx_dsa_port_enable - remove unecessary skiping of disabling of CPU port - remove unecessary dev_set_parent_priv - remove unnecessary static init flag - replace debug with a dev_warn if switch device-id unsupported - remove unnecessary xmit/recv functions as we rely on the fact that only a single port is active instead of mangling packets --- drivers/net/Kconfig | 7 + drivers/net/Makefile | 1 + drivers/net/mv88e6xxx.c | 755 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 763 insertions(+) create mode 100644 drivers/net/mv88e6xxx.c

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 029bf3872aa5..88ffd46973da 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -443,6 +443,13 @@ config LITEETH help Driver for the LiteEth Ethernet MAC from LiteX.

+config MV88E6XXX + bool "Marvell MV88E6xxx Ethernet switch DSA driver" + depends on DM_DSA && DM_MDIO + help + This driver implements a DSA switch driver for the MV88E6xxx family + of Ethernet switches using the MDIO interface + config MVGBE bool "Marvell Orion5x/Kirkwood network interface support" depends on ARCH_KIRKWOOD || ARCH_ORION5X diff --git a/drivers/net/Makefile b/drivers/net/Makefile index d3fc6b7d3ee4..4088ad0ba5f6 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -60,6 +60,7 @@ obj-$(CONFIG_MEDIATEK_ETH) += mtk_eth.o obj-$(CONFIG_MPC8XX_FEC) += mpc8xx_fec.o obj-$(CONFIG_MT7620_ETH) += mt7620-eth.o obj-$(CONFIG_MT7628_ETH) += mt7628-eth.o +obj-$(CONFIG_MV88E6XXX) += mv88e6xxx.o obj-$(CONFIG_MVGBE) += mvgbe.o obj-$(CONFIG_MVMDIO) += mvmdio.o obj-$(CONFIG_MVNETA) += mvneta.o diff --git a/drivers/net/mv88e6xxx.c b/drivers/net/mv88e6xxx.c new file mode 100644 index 000000000000..64e860e324dc --- /dev/null +++ b/drivers/net/mv88e6xxx.c @@ -0,0 +1,755 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2022 + * Gateworks Corporation <www.gateworks.com> + * Tim Harvey tharvey@gateworks.com + * + * (C) Copyright 2015 + * Elecsys Corporation <www.elecsyscorp.com> + * Kevin Smith kevin.smith@elecsyscorp.com + * + * Original driver: + * (C) Copyright 2009 + * Marvell Semiconductor <www.marvell.com> + * Prafulla Wadaskar prafulla@marvell.com + */ + +/* + * DSA driver for mv88e6xxx ethernet switches. + * + * This driver configures the mv88e6xxx for basic use as a DSA switch. + * + * This driver was adapted from drivers/net/phy/mv88e61xx and tested + * on the mv88e6176 via an SGMII interface. + */ + +#include <common.h> +#include <dm/device.h> +#include <dm/device_compat.h> +#include <dm/device-internal.h> +#include <dm/lists.h> +#include <dm/of_extra.h> +#include <linux/delay.h> +#include <miiphy.h> +#include <net/dsa.h> + +/* Device addresses */ +#define DEVADDR_PHY(p) (p) +#define DEVADDR_SERDES 0x0F + +/* SMI indirection registers for multichip addressing mode */ +#define SMI_CMD_REG 0x00 +#define SMI_DATA_REG 0x01 + +/* Global registers */ +#define GLOBAL1_STATUS 0x00 +#define GLOBAL1_CTRL 0x04 + +/* Global 2 registers */ +#define GLOBAL2_REG_PHY_CMD 0x18 +#define GLOBAL2_REG_PHY_DATA 0x19 +#define GLOBAL2_REG_SCRATCH 0x1A + +/* Port registers */ +#define PORT_REG_STATUS 0x00 +#define PORT_REG_PHYS_CTRL 0x01 +#define PORT_REG_SWITCH_ID 0x03 +#define PORT_REG_CTRL 0x04 + +/* Phy registers */ +#define PHY_REG_PAGE 0x16 + +/* Phy page numbers */ +#define PHY_PAGE_COPPER 0 +#define PHY_PAGE_SERDES 1 + +/* Register fields */ +#define GLOBAL1_CTRL_SWRESET BIT(15) + +#define PORT_REG_STATUS_SPEED_SHIFT 8 +#define PORT_REG_STATUS_SPEED_10 0 +#define PORT_REG_STATUS_SPEED_100 1 +#define PORT_REG_STATUS_SPEED_1000 2 + +#define PORT_REG_STATUS_CMODE_MASK 0xF +#define PORT_REG_STATUS_CMODE_SGMII 0xa +#define PORT_REG_STATUS_CMODE_1000BASE_X 0x9 +#define PORT_REG_STATUS_CMODE_100BASE_X 0x8 +#define PORT_REG_STATUS_CMODE_RGMII 0x7 +#define PORT_REG_STATUS_CMODE_RMII 0x5 +#define PORT_REG_STATUS_CMODE_RMII_PHY 0x4 +#define PORT_REG_STATUS_CMODE_GMII 0x3 +#define PORT_REG_STATUS_CMODE_MII 0x2 +#define PORT_REG_STATUS_CMODE_MIIPHY 0x1 + +#define PORT_REG_PHYS_CTRL_RGMII_DELAY_RXCLK BIT(15) +#define PORT_REG_PHYS_CTRL_RGMII_DELAY_TXCLK BIT(14) +#define PORT_REG_PHYS_CTRL_PCS_AN_EN BIT(10) +#define PORT_REG_PHYS_CTRL_PCS_AN_RST BIT(9) +#define PORT_REG_PHYS_CTRL_FC_VALUE BIT(7) +#define PORT_REG_PHYS_CTRL_FC_FORCE BIT(6) +#define PORT_REG_PHYS_CTRL_LINK_VALUE BIT(5) +#define PORT_REG_PHYS_CTRL_LINK_FORCE BIT(4) +#define PORT_REG_PHYS_CTRL_DUPLEX_VALUE BIT(3) +#define PORT_REG_PHYS_CTRL_DUPLEX_FORCE BIT(2) +#define PORT_REG_PHYS_CTRL_SPD1000 BIT(1) +#define PORT_REG_PHYS_CTRL_SPD100 BIT(0) +#define PORT_REG_PHYS_CTRL_SPD_MASK (BIT(1) | BIT(0)) + +#define PORT_REG_CTRL_PSTATE_SHIFT 0 +#define PORT_REG_CTRL_PSTATE_MASK 3 + +/* Field values */ +#define PORT_REG_CTRL_PSTATE_DISABLED 0 +#define PORT_REG_CTRL_PSTATE_FORWARD 3 + +/* + * Macros for building commands for indirect addressing modes. These are valid + * for both the indirect multichip addressing mode and the PHY indirection + * required for the writes to any PHY register. + */ +#define SMI_BUSY BIT(15) +#define SMI_CMD_CLAUSE_22 BIT(12) +#define SMI_CMD_CLAUSE_22_OP_READ (2 << 10) +#define SMI_CMD_CLAUSE_22_OP_WRITE (1 << 10) +#define SMI_CMD_ADDR_SHIFT 5 +#define SMI_CMD_ADDR_MASK 0x1f +#define SMI_CMD_REG_SHIFT 0 +#define SMI_CMD_REG_MASK 0x1f +#define SMI_CMD_READ(addr, reg) \ + (SMI_BUSY | SMI_CMD_CLAUSE_22 | SMI_CMD_CLAUSE_22_OP_READ) | \ + (((addr) & SMI_CMD_ADDR_MASK) << SMI_CMD_ADDR_SHIFT) | \ + (((reg) & SMI_CMD_REG_MASK) << SMI_CMD_REG_SHIFT) +#define SMI_CMD_WRITE(addr, reg) \ + (SMI_BUSY | SMI_CMD_CLAUSE_22 | SMI_CMD_CLAUSE_22_OP_WRITE) | \ + (((addr) & SMI_CMD_ADDR_MASK) << SMI_CMD_ADDR_SHIFT) | \ + (((reg) & SMI_CMD_REG_MASK) << SMI_CMD_REG_SHIFT) + +/* ID register values for different switch models */ +#define PORT_SWITCH_ID_6020 0x0200 +#define PORT_SWITCH_ID_6070 0x0700 +#define PORT_SWITCH_ID_6071 0x0710 +#define PORT_SWITCH_ID_6096 0x0980 +#define PORT_SWITCH_ID_6097 0x0990 +#define PORT_SWITCH_ID_6172 0x1720 +#define PORT_SWITCH_ID_6176 0x1760 +#define PORT_SWITCH_ID_6220 0x2200 +#define PORT_SWITCH_ID_6240 0x2400 +#define PORT_SWITCH_ID_6250 0x2500 +#define PORT_SWITCH_ID_6320 0x1150 +#define PORT_SWITCH_ID_6352 0x3520 + +struct mv88e6xxx_priv { + int smi_addr; + int id; + int port_count; /* Number of switch ports */ + int port_reg_base; /* Base of the switch port registers */ + u8 global1; /* Offset of Switch Global 1 registers */ + u8 global2; /* Offset of Switch Global 2 registers */ +}; + +/* Wait for the current SMI indirect command to complete */ +static int mv88e6xxx_smi_wait(struct udevice *dev, int smi_addr) +{ + int val; + u32 timeout = 100; + + do { + val = dm_mdio_read(dev->parent, smi_addr, MDIO_DEVAD_NONE, SMI_CMD_REG); + if (val >= 0 && (val & SMI_BUSY) == 0) + return 0; + + mdelay(1); + } while (--timeout); + + dev_err(dev, "SMI busy timeout\n"); + return -ETIMEDOUT; +} + +/* + * The mv88e6xxx has three types of addresses: the smi bus address, the device + * address, and the register address. The smi bus address distinguishes it on + * the smi bus from other PHYs or switches. The device address determines + * which on-chip register set you are reading/writing (the various PHYs, their + * associated ports, or global configuration registers). The register address + * is the offset of the register you are reading/writing. + * + * When the mv88e6xxx is hardware configured to have address zero, it behaves in + * single-chip addressing mode, where it responds to all SMI addresses, using + * the smi address as its device address. This obviously only works when this + * is the only chip on the SMI bus. This allows the driver to access device + * registers without using indirection. When the chip is configured to a + * non-zero address, it only responds to that SMI address and requires indirect + * writes to access the different device addresses. + */ +static int mv88e6xxx_reg_read(struct udevice *dev, int addr, int reg) +{ + struct mv88e6xxx_priv *priv = dev_get_priv(dev); + int smi_addr = priv->smi_addr; + int res; + + /* In single-chip mode, the device can be addressed directly */ + if (smi_addr == 0) + return dm_mdio_read(dev->parent, addr, MDIO_DEVAD_NONE, reg); + + /* Wait for the bus to become free */ + res = mv88e6xxx_smi_wait(dev, smi_addr); + if (res < 0) + return res; + + /* Issue the read command */ + res = dm_mdio_write(dev->parent, smi_addr, MDIO_DEVAD_NONE, SMI_CMD_REG, + SMI_CMD_READ(addr, reg)); + if (res < 0) + return res; + + /* Wait for the read command to complete */ + res = mv88e6xxx_smi_wait(dev, smi_addr); + if (res < 0) + return res; + + /* Read the data */ + res = dm_mdio_read(dev->parent, smi_addr, MDIO_DEVAD_NONE, SMI_DATA_REG); + if (res < 0) + return res; + + return res & 0xffff; +} + +/* See the comment above mv88e6xxx_reg_read */ +static int mv88e6xxx_reg_write(struct udevice *dev, int addr, int reg, u16 val) +{ + struct mv88e6xxx_priv *priv = dev_get_priv(dev); + int smi_addr = priv->smi_addr; + int res; + + /* In single-chip mode, the device can be addressed directly */ + if (smi_addr == 0) + return dm_mdio_write(dev->parent, addr, MDIO_DEVAD_NONE, reg, val); + + /* Wait for the bus to become free */ + res = mv88e6xxx_smi_wait(dev, smi_addr); + if (res < 0) + return res; + + /* Set the data to write */ + res = dm_mdio_write(dev->parent, smi_addr, MDIO_DEVAD_NONE, + SMI_DATA_REG, val); + if (res < 0) + return res; + + /* Issue the write command */ + res = dm_mdio_write(dev->parent, smi_addr, MDIO_DEVAD_NONE, SMI_CMD_REG, + SMI_CMD_WRITE(addr, reg)); + if (res < 0) + return res; + + /* Wait for the write command to complete */ + res = mv88e6xxx_smi_wait(dev, smi_addr); + if (res < 0) + return res; + + return 0; +} + +static int mv88e6xxx_phy_wait(struct udevice *dev) +{ + struct mv88e6xxx_priv *priv = dev_get_priv(dev); + int val; + u32 timeout = 100; + + do { + val = mv88e6xxx_reg_read(dev, priv->global2, GLOBAL2_REG_PHY_CMD); + if (val >= 0 && (val & SMI_BUSY) == 0) + return 0; + + mdelay(1); + } while (--timeout); + + return -ETIMEDOUT; +} + +static int mv88e6xxx_phy_read_indirect(struct udevice *dev, int phyad, int devad, int reg) +{ + struct mv88e6xxx_priv *priv = dev_get_priv(dev); + int res; + + /* Issue command to read */ + res = mv88e6xxx_reg_write(dev, priv->global2, + GLOBAL2_REG_PHY_CMD, + SMI_CMD_READ(phyad, reg)); + + /* Wait for data to be read */ + res = mv88e6xxx_phy_wait(dev); + if (res < 0) + return res; + + /* Read retrieved data */ + return mv88e6xxx_reg_read(dev, priv->global2, + GLOBAL2_REG_PHY_DATA); +} + +static int mv88e6xxx_phy_write_indirect(struct udevice *dev, int phyad, + int devad, int reg, u16 data) +{ + struct mv88e6xxx_priv *priv = dev_get_priv(dev); + int res; + + /* Set the data to write */ + res = mv88e6xxx_reg_write(dev, priv->global2, + GLOBAL2_REG_PHY_DATA, data); + if (res < 0) + return res; + /* Issue the write command */ + res = mv88e6xxx_reg_write(dev, priv->global2, + GLOBAL2_REG_PHY_CMD, + SMI_CMD_WRITE(phyad, reg)); + if (res < 0) + return res; + + /* Wait for command to complete */ + return mv88e6xxx_phy_wait(dev); +} + +/* Wrapper function to make calls to phy_read_indirect simpler */ +static int mv88e6xxx_phy_read(struct udevice *dev, int phy, int reg) +{ + return mv88e6xxx_phy_read_indirect(dev, DEVADDR_PHY(phy), + MDIO_DEVAD_NONE, reg); +} + +/* Wrapper function to make calls to phy_write_indirect simpler */ +static int mv88e6xxx_phy_write(struct udevice *dev, int phy, int reg, u16 val) +{ + return mv88e6xxx_phy_write_indirect(dev, DEVADDR_PHY(phy), + MDIO_DEVAD_NONE, reg, val); +} + +static int mv88e6xxx_port_read(struct udevice *dev, u8 port, u8 reg) +{ + struct mv88e6xxx_priv *priv = dev_get_priv(dev); + + return mv88e6xxx_reg_read(dev, priv->port_reg_base + port, reg); +} + +static int mv88e6xxx_port_write(struct udevice *dev, u8 port, u8 reg, u16 val) +{ + struct mv88e6xxx_priv *priv = dev_get_priv(dev); + + return mv88e6xxx_reg_write(dev, priv->port_reg_base + port, reg, val); +} + +static int mv88e6xxx_set_page(struct udevice *dev, u8 phy, u8 page) +{ + return mv88e6xxx_phy_write(dev, phy, PHY_REG_PAGE, page); +} + +static int mv88e6xxx_get_switch_id(struct udevice *dev) +{ + int res; + + res = mv88e6xxx_port_read(dev, 0, PORT_REG_SWITCH_ID); + if (res < 0) { + dev_err(dev, "Failed to read switch ID: %d\n", res); + return res; + } + return res & 0xfff0; +} + +static bool mv88e6xxx_6352_family(struct udevice *dev) +{ + struct mv88e6xxx_priv *priv = dev_get_priv(dev); + + switch (priv->id) { + case PORT_SWITCH_ID_6172: + case PORT_SWITCH_ID_6176: + case PORT_SWITCH_ID_6240: + case PORT_SWITCH_ID_6352: + return true; + } + return false; +} + +static int mv88e6xxx_get_cmode(struct udevice *dev, u8 port) +{ + int res; + + res = mv88e6xxx_port_read(dev, port, PORT_REG_STATUS); + if (res < 0) + return res; + return res & PORT_REG_STATUS_CMODE_MASK; +} + +static int mv88e6xxx_switch_reset(struct udevice *dev) +{ + struct mv88e6xxx_priv *priv = dev_get_priv(dev); + int time_ms; + int val; + u8 port; + + /* Disable all ports */ + for (port = 0; port < priv->port_count; port++) { + val = mv88e6xxx_port_read(dev, port, PORT_REG_CTRL); + if (val < 0) + return val; + val &= ~(PORT_REG_CTRL_PSTATE_MASK << PORT_REG_CTRL_PSTATE_SHIFT); + val |= (PORT_REG_CTRL_PSTATE_DISABLED << PORT_REG_CTRL_PSTATE_SHIFT); + val = mv88e6xxx_port_write(dev, port, PORT_REG_CTRL, val); + if (val < 0) + return val; + } + + /* Wait 2 ms for queues to drain */ + udelay(2000); + + /* Reset switch */ + val = mv88e6xxx_reg_read(dev, priv->global1, GLOBAL1_CTRL); + if (val < 0) + return val; + val |= GLOBAL1_CTRL_SWRESET; + val = mv88e6xxx_reg_write(dev, priv->global1, GLOBAL1_CTRL, val); + if (val < 0) + return val; + + /* Wait up to 1 second for switch to reset complete */ + for (time_ms = 1000; time_ms; time_ms--) { + val = mv88e6xxx_reg_read(dev, priv->global1, GLOBAL1_CTRL); + if (val >= 0 && ((val & GLOBAL1_CTRL_SWRESET) == 0)) + break; + udelay(1000); + } + if (!time_ms) + return -ETIMEDOUT; + + return 0; +} + +static int mv88e6xxx_serdes_init(struct udevice *dev) +{ + int val; + + val = mv88e6xxx_set_page(dev, DEVADDR_SERDES, PHY_PAGE_SERDES); + if (val < 0) + return val; + + /* Power up serdes module */ + val = mv88e6xxx_phy_read(dev, DEVADDR_SERDES, MII_BMCR); + if (val < 0) + return val; + val &= ~(BMCR_PDOWN); + val = mv88e6xxx_phy_write(dev, DEVADDR_SERDES, MII_BMCR, val); + if (val < 0) + return val; + + return 0; +} + +/* + * This function is used to pre-configure the required register + * offsets, so that the indirect register access to the PHY registers + * is possible. This is necessary to be able to read the PHY ID + * while driver probing or in get_phy_id(). The globalN register + * offsets must be initialized correctly for a detected switch, + * otherwise detection of the PHY ID won't work! + */ +static int mv88e6xxx_priv_reg_offs_pre_init(struct udevice *dev) +{ + struct mv88e6xxx_priv *priv = dev_get_priv(dev); + + /* + * Initial 'port_reg_base' value must be an offset of existing + * port register, then reading the ID should succeed. First, try + * to read via port registers with device address 0x10 (88E6096 + * and compatible switches). + */ + priv->port_reg_base = 0x10; + priv->id = mv88e6xxx_get_switch_id(dev); + if (priv->id != 0xfff0) { + priv->global1 = 0x1B; + priv->global2 = 0x1C; + return 0; + } + + /* + * Now try via port registers with device address 0x08 + * (88E6020 and compatible switches). + */ + priv->port_reg_base = 0x08; + priv->id = mv88e6xxx_get_switch_id(dev); + if (priv->id != 0xfff0) { + priv->global1 = 0x0F; + priv->global2 = 0x07; + return 0; + } + + dev_warn(dev, "%s Unknown ID 0x%x\n", __func__, priv->id); + + return -ENODEV; +} + +static int mv88e6xxx_mdio_read(struct udevice *dev, int addr, int devad, int reg) +{ + return mv88e6xxx_phy_read_indirect(dev->parent, DEVADDR_PHY(addr), + MDIO_DEVAD_NONE, reg); +} + +static int mv88e6xxx_mdio_write(struct udevice *dev, int addr, int devad, + int reg, u16 val) +{ + return mv88e6xxx_phy_write_indirect(dev->parent, DEVADDR_PHY(addr), + MDIO_DEVAD_NONE, reg, val); +} + +static const struct mdio_ops mv88e6xxx_mdio_ops = { + .read = mv88e6xxx_mdio_read, + .write = mv88e6xxx_mdio_write, +}; + +static int mv88e6xxx_mdio_bind(struct udevice *dev) +{ + char name[32]; + static int num_devices; + + sprintf(name, "mv88e6xxx-mdio-%d", num_devices++); + device_set_name(dev, name); + + return 0; +} + +U_BOOT_DRIVER(mv88e6xxx_mdio) = { + .name = "mv88e6xxx_mdio", + .id = UCLASS_MDIO, + .ops = &mv88e6xxx_mdio_ops, + .bind = mv88e6xxx_mdio_bind, + .plat_auto = sizeof(struct mdio_perdev_priv), +}; + +static int mv88e6xxx_port_probe(struct udevice *dev, int port, struct phy_device *phy) +{ + struct mv88e6xxx_priv *priv = dev_get_priv(dev); + int supported; + + switch (priv->id) { + case PORT_SWITCH_ID_6020: + case PORT_SWITCH_ID_6070: + case PORT_SWITCH_ID_6071: + supported = PHY_BASIC_FEATURES | SUPPORTED_MII; + break; + default: + supported = PHY_GBIT_FEATURES; + break; + } + + phy->supported &= supported; + phy->advertising &= supported; + + return phy_config(phy); +} + +static int mv88e6xxx_port_enable(struct udevice *dev, int port, struct phy_device *phy) +{ + int val, ret; + + dev_dbg(dev, "%s P%d phy:0x%08x %s\n", __func__, port, + phy->phy_id, phy_string_for_interface(phy->interface)); + + if (phy->phy_id == PHY_FIXED_ID) { + /* Physical Control register: Table 62 */ + val = mv88e6xxx_port_read(dev, port, PORT_REG_PHYS_CTRL); + + /* configure RGMII delays for fixed link */ + switch (phy->interface) { + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: + dev_dbg(dev, "configure internal RGMII delays\n"); + + /* RGMII delays */ + val &= ~(PORT_REG_PHYS_CTRL_RGMII_DELAY_RXCLK || + PORT_REG_PHYS_CTRL_RGMII_DELAY_TXCLK); + if (phy->interface == PHY_INTERFACE_MODE_RGMII_ID || + phy->interface == PHY_INTERFACE_MODE_RGMII_RXID) + val |= PORT_REG_PHYS_CTRL_RGMII_DELAY_RXCLK; + if (phy->interface == PHY_INTERFACE_MODE_RGMII_ID || + phy->interface == PHY_INTERFACE_MODE_RGMII_TXID) + val |= PORT_REG_PHYS_CTRL_RGMII_DELAY_TXCLK; + break; + default: + break; + } + + /* Force Link */ + val |= PORT_REG_PHYS_CTRL_LINK_VALUE | + PORT_REG_PHYS_CTRL_LINK_FORCE; + + ret = mv88e6xxx_port_write(dev, port, PORT_REG_PHYS_CTRL, val); + if (ret < 0) + return ret; + + if (mv88e6xxx_6352_family(dev)) { + /* validate interface type */ + dev_dbg(dev, "validate interface type\n"); + val = mv88e6xxx_get_cmode(dev, port); + if (val < 0) + return val; + switch (phy->interface) { + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: + case PHY_INTERFACE_MODE_RGMII_ID: + if (val != PORT_REG_STATUS_CMODE_RGMII) + goto mismatch; + break; + case PHY_INTERFACE_MODE_1000BASEX: + if (val != PORT_REG_STATUS_CMODE_1000BASE_X) + goto mismatch; + break; +mismatch: + default: + dev_err(dev, "Mismatched PHY mode %s on port %d!\n", + phy_string_for_interface(phy->interface), port); + break; + } + } + } + + /* enable port */ + val = mv88e6xxx_port_read(dev, port, PORT_REG_CTRL); + if (val < 0) + return val; + val &= ~(PORT_REG_CTRL_PSTATE_MASK << PORT_REG_CTRL_PSTATE_SHIFT); + val |= (PORT_REG_CTRL_PSTATE_FORWARD << PORT_REG_CTRL_PSTATE_SHIFT); + val = mv88e6xxx_port_write(dev, port, PORT_REG_CTRL, val); + if (val < 0) + return val; + + return phy_startup(phy); +} + +static void mv88e6xxx_port_disable(struct udevice *dev, int port, struct phy_device *phy) +{ + int val; + + dev_dbg(dev, "%s P%d phy:0x%08x %s\n", __func__, port, + phy->phy_id, phy_string_for_interface(phy->interface)); + + val = mv88e6xxx_port_read(dev, port, PORT_REG_CTRL); + val &= ~(PORT_REG_CTRL_PSTATE_MASK << PORT_REG_CTRL_PSTATE_SHIFT); + val |= (PORT_REG_CTRL_PSTATE_DISABLED << PORT_REG_CTRL_PSTATE_SHIFT); + mv88e6xxx_port_write(dev, port, PORT_REG_CTRL, val); +} + +static const struct dsa_ops mv88e6xxx_dsa_ops = { + .port_probe = mv88e6xxx_port_probe, + .port_enable = mv88e6xxx_port_enable, + .port_disable = mv88e6xxx_port_disable, +}; + +/* bind and probe the switch mdios */ +static int mv88e6xxx_probe_mdio(struct udevice *dev) +{ + struct udevice *mdev; + const char *name; + ofnode node; + int ret; + + /* bind phy ports of mdio child node to mv88e6xxx_mdio device */ + node = dev_read_subnode(dev, "mdio"); + if (!ofnode_valid(node)) + return 0; + + name = ofnode_get_name(node); + ret = device_bind_driver_to_node(dev, + "mv88e6xxx_mdio", + name, node, NULL); + if (ret) { + dev_err(dev, "failed to bind %s: %d\n", name, ret); + } else { + /* need to probe it as there is no compatible to do so */ + ret = uclass_get_device_by_ofnode(UCLASS_MDIO, node, &mdev); + if (ret) + dev_err(dev, "failed to probe %s: %d\n", name, ret); + } + + return ret; +} + +static int mv88e6xxx_probe(struct udevice *dev) +{ + struct dsa_pdata *dsa_pdata = dev_get_uclass_plat(dev); + struct mv88e6xxx_priv *priv = dev_get_priv(dev); + int val, ret; + + if (ofnode_valid(dev_ofnode(dev)) && + !ofnode_is_enabled(dev_ofnode(dev))) { + dev_dbg(dev, "switch disabled\n"); + return -ENODEV; + } + + /* probe internal mdio bus */ + ret = mv88e6xxx_probe_mdio(dev); + if (ret) + return ret; + + ret = mv88e6xxx_priv_reg_offs_pre_init(dev); + if (ret) + return ret; + + dev_dbg(dev, "ID=0x%x PORT_BASE=0x%02x GLOBAL1=0x%02x GLOBAL2=0x%02x\n", + priv->id, priv->port_reg_base, priv->global1, priv->global2); + switch (priv->id) { + case PORT_SWITCH_ID_6096: + case PORT_SWITCH_ID_6097: + case PORT_SWITCH_ID_6172: + case PORT_SWITCH_ID_6176: + case PORT_SWITCH_ID_6240: + case PORT_SWITCH_ID_6352: + priv->port_count = 11; + break; + case PORT_SWITCH_ID_6020: + case PORT_SWITCH_ID_6070: + case PORT_SWITCH_ID_6071: + case PORT_SWITCH_ID_6220: + case PORT_SWITCH_ID_6250: + case PORT_SWITCH_ID_6320: + priv->port_count = 7; + break; + default: + return -ENODEV; + } + + ret = mv88e6xxx_switch_reset(dev); + if (ret < 0) + return ret; + + if (mv88e6xxx_6352_family(dev)) { + val = mv88e6xxx_get_cmode(dev, dsa_pdata->cpu_port); + if (val < 0) + return val; + /* initialize serdes */ + if (val == PORT_REG_STATUS_CMODE_100BASE_X || + val == PORT_REG_STATUS_CMODE_1000BASE_X || + val == PORT_REG_STATUS_CMODE_SGMII) { + ret = mv88e6xxx_serdes_init(dev); + if (ret < 0) + return ret; + } + } + + return 0; +} + +static const struct udevice_id mv88e6xxx_ids[] = { + { .compatible = "marvell,mv88e6085" }, + { } +}; + +U_BOOT_DRIVER(mv88e6xxx) = { + .name = "mv88e6xxx", + .id = UCLASS_DSA, + .of_match = mv88e6xxx_ids, + .probe = mv88e6xxx_probe, + .ops = &mv88e6xxx_dsa_ops, + .priv_auto = sizeof(struct mv88e6xxx_priv), +};