[PATCH v3 7/8] net: add MV88E61xx DSA driver
Vladimir Oltean
vladimir.oltean at nxp.com
Mon Jun 20 13:58:48 CEST 2022
On Mon, May 23, 2022 at 11:25:48AM -0700, Tim Harvey wrote:
> Add a DSA driver for the MV88E61xx compatible GbE Ethernet switches.
>
> Cc: Marek BehĂșn <marek.behun at nic.cz>
> Cc: Vladimir Oltean <vladimir.oltean at nxp.com>
> Signed-off-by: Tim Harvey <tharvey at gateworks.com>
> Reviewed-by: Vladimir Oltean <vladimir.oltean at nxp.com>
> ---
> 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
This looks good, but my opinion remains that we can rename mv88e61xx to
mv88e6xxx for consistency with Linux. Users will know that the drivers
are expected to support the same hardware models (even if the compatible
list is now incomplete and does not cover an actual 61xx device).
> ---
> drivers/net/Kconfig | 7 +
> drivers/net/Makefile | 1 +
> drivers/net/mv88e61xx.c | 843 ++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 851 insertions(+)
> create mode 100644 drivers/net/mv88e61xx.c
>
> diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
> index 7fe0e00649cf..edb1a0898986 100644
> --- a/drivers/net/Kconfig
> +++ b/drivers/net/Kconfig
> @@ -433,6 +433,13 @@ config LPC32XX_ETH
> depends on ARCH_LPC32XX
> default y
>
> +config MV88E61XX
> + bool "Marvell MV88E61xx GbE switch DSA driver"
> + depends on DM_DSA && DM_MDIO
> + help
> + This driver implements a DSA switch driver for the MV88E61xx family
> + of GbE 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 69fb3bbbf7cb..36b4c279430a 100644
> --- a/drivers/net/Makefile
> +++ b/drivers/net/Makefile
> @@ -59,6 +59,7 @@ 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-$(CONFIG_MV88E61XX) += mv88e61xx.o
> obj-$(CONFIG_MVGBE) += mvgbe.o
> obj-$(CONFIG_MVMDIO) += mvmdio.o
> obj-$(CONFIG_MVNETA) += mvneta.o
> diff --git a/drivers/net/mv88e61xx.c b/drivers/net/mv88e61xx.c
> new file mode 100644
> index 000000000000..514835bf03b9
> --- /dev/null
> +++ b/drivers/net/mv88e61xx.c
> @@ -0,0 +1,843 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * (C) Copyright 2022
> + * Gateworks Corporation <http://www.gateworks.com/>
> + * Tim Harvey <tharvey at gateworks.com>
> + *
> + * (C) Copyright 2015
> + * Elecsys Corporation <http://www.elecsyscorp.com/>
> + * Kevin Smith <kevin.smith at elecsyscorp.com>
> + *
> + * Original driver:
> + * (C) Copyright 2009
> + * Marvell Semiconductor <http://www.marvell.com/>
> + * Prafulla Wadaskar <prafulla at marvell.com>
> + */
> +
> +/*
> + * DSA driver for mv88e61xx ethernet switches.
> + *
> + * This driver configures the mv88e61xx 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 <bitfield.h>
> +#include <common.h>
> +#include <miiphy.h>
Alphabetic ordering please.
> +#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 <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
> +#define GLOBAL1_MON_CTRL 0x1A
> +
> +/* 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
> +#define PORT_REG_VLAN_MAP 0x06
> +#define PORT_REG_VLAN_ID 0x07
> +#define PORT_REG_LED_CTRL 0x16
> +
> +/* Phy registers */
> +#define PHY_REG_CTRL1 0x10
> +#define PHY_REG_STATUS1 0x11
> +#define PHY_REG_PAGE 0x16
> +
> +/* Serdes registers */
> +#define SERDES_REG_CTRL_1 0x10
> +
> +/* Phy page numbers */
> +#define PHY_PAGE_COPPER 0
> +#define PHY_PAGE_SERDES 1
> +
> +/* Register fields */
> +#define GLOBAL1_CTRL_SWRESET BIT(15)
> +
> +#define GLOBAL1_MON_CTRL_CPUDEST_SHIFT 4
> +#define GLOBAL1_MON_CTRL_CPUDEST_WIDTH 4
> +
> +#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_100BASE_X 0x8
> +#define PORT_REG_STATUS_CMODE_1000BASE_X 0x9
> +#define PORT_REG_STATUS_CMODE_SGMII 0xa
> +
> +#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_WIDTH 2
> +
> +#define PORT_REG_VLAN_ID_DEF_VID_SHIFT 0
> +#define PORT_REG_VLAN_ID_DEF_VID_WIDTH 12
> +
> +#define PORT_REG_VLAN_MAP_TABLE_SHIFT 0
> +#define PORT_REG_VLAN_MAP_TABLE_WIDTH 11
> +
> +#define SERDES_REG_CTRL_1_FORCE_LINK BIT(10)
> +
> +/* Field values */
> +#define PORT_REG_CTRL_PSTATE_DISABLED 0
> +#define PORT_REG_CTRL_PSTATE_FORWARD 3
> +
> +#define PHY_REG_CTRL1_ENERGY_DET_OFF 0
> +#define PHY_REG_CTRL1_ENERGY_DET_SENSE_PULSE 1
> +#define PHY_REG_CTRL1_ENERGY_DET_SENSE_ONLY 2
> +#define PHY_REG_CTRL1_ENERGY_DET_SENSE_XMIT 3
> +
> +/* PHY Status Register */
> +#define PHY_REG_STATUS1_SPEED 0xc000
> +#define PHY_REG_STATUS1_GBIT 0x8000
> +#define PHY_REG_STATUS1_100 0x4000
> +#define PHY_REG_STATUS1_DUPLEX 0x2000
> +#define PHY_REG_STATUS1_SPDDONE 0x0800
> +#define PHY_REG_STATUS1_LINK 0x0400
> +#define PHY_REG_STATUS1_ENERGY 0x0010
> +
> +/*
> + * 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_READ (SMI_BUSY | SMI_CMD_CLAUSE_22 | \
> + SMI_CMD_CLAUSE_22_OP_READ)
> +#define SMI_CMD_WRITE (SMI_BUSY | SMI_CMD_CLAUSE_22 | \
> + SMI_CMD_CLAUSE_22_OP_WRITE)
> +
> +#define SMI_CMD_ADDR_SHIFT 5
> +#define SMI_CMD_ADDR_WIDTH 5
> +#define SMI_CMD_REG_SHIFT 0
> +#define SMI_CMD_REG_WIDTH 5
> +
> +/* Defines for Scratch and Misc Registers */
> +#define SCRATCH_UPDATE BIT(15)
> +#define SCRATCH_ADDR_SHIFT 8
> +#define SCRATCH_ADDR_WIDTH 7
> +
> +/* Scratch registers */
> +#define SCRATCH_ADDR_GPIO0DIR 0x62 /* GPIO[7:0] direction 1=input */
> +#define SCRATCH_ADDR_GPIO1DIR 0x63 /* GPIO[14:8] direction 1=input */
> +#define SCRATCH_ADDR_GPIO0DATA 0x64 /* GPIO[7:0] data */
> +#define SCRATCH_ADDR_GPIO1DATA 0x65 /* GPIO[14:8] data */
> +#define SCRATCH_ADDR_GPIO0CTRL 0x68 /* GPIO[1:0] control */
> +#define SCRATCH_ADDR_GPIO1CTRL 0x69 /* GPIO[3:2] control */
> +
> +/* 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_6352 0x3520
> +
> +struct mv88e61xx_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 */
> + u8 phy_ctrl1_en_det_shift; /* 'EDet' bit field offset */
> + u8 phy_ctrl1_en_det_width; /* Width of 'EDet' bit field */
> + u8 phy_ctrl1_en_det_ctrl; /* 'EDet' control value */
> +};
> +
> +static inline int smi_cmd(int cmd, int addr, int reg)
> +{
> + cmd = bitfield_replace(cmd, SMI_CMD_ADDR_SHIFT, SMI_CMD_ADDR_WIDTH,
> + addr);
> + cmd = bitfield_replace(cmd, SMI_CMD_REG_SHIFT, SMI_CMD_REG_WIDTH, reg);
> + return cmd;
> +}
> +
> +static inline int smi_cmd_read(int addr, int reg)
> +{
> + return smi_cmd(SMI_CMD_READ, addr, reg);
> +}
> +
> +static inline int smi_cmd_write(int addr, int reg)
> +{
> + return smi_cmd(SMI_CMD_WRITE, addr, reg);
> +}
> +
> +/* Wait for the current SMI indirect command to complete */
> +static int mv88e61xx_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 mv88e61xx 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 mv88e61xx 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 mv88e61xx_reg_read(struct udevice *dev, int addr, int reg)
> +{
> + struct mv88e61xx_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 = mv88e61xx_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 = mv88e61xx_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 bitfield_extract(res, 0, 16);
> +}
> +
> +/* See the comment above mv88e61xx_reg_read */
> +static int mv88e61xx_reg_write(struct udevice *dev, int addr, int reg, u16 val)
> +{
> + struct mv88e61xx_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 = mv88e61xx_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 = mv88e61xx_smi_wait(dev, smi_addr);
> + if (res < 0)
> + return res;
> +
> + return 0;
> +}
> +
> +static int mv88e61xx_phy_wait(struct udevice *dev)
> +{
> + struct mv88e61xx_priv *priv = dev_get_priv(dev);
> + int val;
> + u32 timeout = 100;
> +
> + do {
> + val = mv88e61xx_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 mv88e61xx_phy_read_indirect(struct udevice *dev, int phyad, int devad, int reg)
> +{
> + struct mv88e61xx_priv *priv = dev_get_priv(dev);
> + int res;
> +
> + /* Issue command to read */
> + res = mv88e61xx_reg_write(dev, priv->global2,
> + GLOBAL2_REG_PHY_CMD,
> + smi_cmd_read(phyad, reg));
> +
> + /* Wait for data to be read */
> + res = mv88e61xx_phy_wait(dev);
> + if (res < 0)
> + return res;
> +
> + /* Read retrieved data */
> + return mv88e61xx_reg_read(dev, priv->global2,
> + GLOBAL2_REG_PHY_DATA);
> +}
> +
> +static int mv88e61xx_phy_write_indirect(struct udevice *dev, int phyad,
> + int devad, int reg, u16 data)
> +{
> + struct mv88e61xx_priv *priv = dev_get_priv(dev);
> + int res;
> +
> + /* Set the data to write */
> + res = mv88e61xx_reg_write(dev, priv->global2,
> + GLOBAL2_REG_PHY_DATA, data);
> + if (res < 0)
> + return res;
> + /* Issue the write command */
> + res = mv88e61xx_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 mv88e61xx_phy_wait(dev);
> +}
> +
> +/* Wrapper function to make calls to phy_read_indirect simpler */
> +static int mv88e61xx_phy_read(struct udevice *dev, int phy, int reg)
> +{
> + return mv88e61xx_phy_read_indirect(dev, DEVADDR_PHY(phy),
> + MDIO_DEVAD_NONE, reg);
> +}
> +
> +/* Wrapper function to make calls to phy_write_indirect simpler */
> +static int mv88e61xx_phy_write(struct udevice *dev, int phy, int reg, u16 val)
> +{
> + return mv88e61xx_phy_write_indirect(dev, DEVADDR_PHY(phy),
> + MDIO_DEVAD_NONE, reg, val);
> +}
> +
> +static int mv88e61xx_port_read(struct udevice *dev, u8 port, u8 reg)
> +{
> + struct mv88e61xx_priv *priv = dev_get_priv(dev);
> +
> + return mv88e61xx_reg_read(dev, priv->port_reg_base + port, reg);
> +}
> +
> +static int mv88e61xx_port_write(struct udevice *dev, u8 port, u8 reg, u16 val)
> +{
> + struct mv88e61xx_priv *priv = dev_get_priv(dev);
> +
> + return mv88e61xx_reg_write(dev, priv->port_reg_base + port, reg, val);
> +}
> +
> +static int mv88e61xx_set_page(struct udevice *dev, u8 phy, u8 page)
> +{
> + return mv88e61xx_phy_write(dev, phy, PHY_REG_PAGE, page);
> +}
> +
> +static int mv88e61xx_get_switch_id(struct udevice *dev)
> +{
> + int res;
> +
> + res = mv88e61xx_port_read(dev, 0, PORT_REG_SWITCH_ID);
> + if (res < 0)
> + return res;
> + return res & 0xfff0;
> +}
> +
> +static bool mv88e61xx_6352_family(struct udevice *dev)
> +{
> + struct mv88e61xx_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 mv88e61xx_get_cmode(struct udevice *dev, u8 port)
> +{
> + int res;
> +
> + res = mv88e61xx_port_read(dev, port, PORT_REG_STATUS);
> + if (res < 0)
> + return res;
> + return res & PORT_REG_STATUS_CMODE_MASK;
> +}
> +
> +static int mv88e61xx_switch_reset(struct udevice *dev)
> +{
> + struct mv88e61xx_priv *priv = dev_get_priv(dev);
> + int time;
> + int val;
> + u8 port;
> +
> + /* Disable all ports */
> + for (port = 0; port < priv->port_count; port++) {
> + val = mv88e61xx_port_read(dev, port, PORT_REG_CTRL);
> + if (val < 0)
> + return val;
> + val = bitfield_replace(val, PORT_REG_CTRL_PSTATE_SHIFT,
> + PORT_REG_CTRL_PSTATE_WIDTH,
> + PORT_REG_CTRL_PSTATE_DISABLED);
> + val = mv88e61xx_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 = mv88e61xx_reg_read(dev, priv->global1, GLOBAL1_CTRL);
> + if (val < 0)
> + return val;
> + val |= GLOBAL1_CTRL_SWRESET;
> + val = mv88e61xx_reg_write(dev, priv->global1, GLOBAL1_CTRL, val);
> + if (val < 0)
> + return val;
> +
> + /* Wait up to 1 second for switch reset complete */
> + for (time = 1000; time; time--) {
> + val = mv88e61xx_reg_read(dev, priv->global1, GLOBAL1_CTRL);
> + if (val >= 0 && ((val & GLOBAL1_CTRL_SWRESET) == 0))
> + break;
> + udelay(1000);
> + }
> + if (!time)
> + return -ETIMEDOUT;
> +
> + return 0;
> +}
> +
> +static int mv88e61xx_serdes_init(struct udevice *dev)
> +{
> + int val;
> +
> + val = mv88e61xx_set_page(dev, DEVADDR_SERDES, PHY_PAGE_SERDES);
> + if (val < 0)
> + return val;
> +
> + /* Power up serdes module */
> + val = mv88e61xx_phy_read(dev, DEVADDR_SERDES, MII_BMCR);
> + if (val < 0)
> + return val;
> + val &= ~(BMCR_PDOWN);
> + val = mv88e61xx_phy_write(dev, DEVADDR_SERDES, MII_BMCR, val);
> + if (val < 0)
> + return val;
> +
> + return 0;
> +}
> +
> +static int mv88e61xx_fixed_port_setup(struct udevice *dev, u8 port)
> +{
> + struct dsa_pdata *dsa_pdata = dev_get_uclass_plat(dev);
> + struct mv88e61xx_priv *priv = dev_get_priv(dev);
> + int val;
> +
> + val = mv88e61xx_port_read(dev, port, PORT_REG_PHYS_CTRL);
> + if (val < 0)
> + return val;
> +
> + val &= ~(PORT_REG_PHYS_CTRL_SPD_MASK |
> + PORT_REG_PHYS_CTRL_FC_VALUE |
> + PORT_REG_PHYS_CTRL_FC_FORCE);
> + val |= PORT_REG_PHYS_CTRL_FC_FORCE |
> + PORT_REG_PHYS_CTRL_DUPLEX_VALUE |
> + PORT_REG_PHYS_CTRL_DUPLEX_FORCE;
> +
> + if (priv->id == PORT_SWITCH_ID_6071) {
> + val |= PORT_REG_PHYS_CTRL_SPD100;
> + } else {
> + val |= PORT_REG_PHYS_CTRL_PCS_AN_EN |
> + PORT_REG_PHYS_CTRL_PCS_AN_RST |
> + PORT_REG_PHYS_CTRL_SPD1000;
> + }
> +
> + if (port == dsa_pdata->cpu_port)
> + val |= PORT_REG_PHYS_CTRL_LINK_VALUE |
> + PORT_REG_PHYS_CTRL_LINK_FORCE;
> +
> + return mv88e61xx_port_write(dev, port, PORT_REG_PHYS_CTRL, val);
> +}
> +
> +/*
> + * 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 mv88e61xx_priv_reg_offs_pre_init(struct udevice *dev)
> +{
> + struct mv88e61xx_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 = mv88e61xx_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 = mv88e61xx_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 mv88e61xx_mdio_read(struct udevice *dev, int addr, int devad, int reg)
> +{
> + return mv88e61xx_phy_read_indirect(dev->parent, DEVADDR_PHY(addr),
> + MDIO_DEVAD_NONE, reg);
> +}
> +
> +static int mv88e61xx_mdio_write(struct udevice *dev, int addr, int devad,
> + int reg, u16 val)
> +{
> + return mv88e61xx_phy_write_indirect(dev->parent, DEVADDR_PHY(addr),
> + MDIO_DEVAD_NONE, reg, val);
> +}
> +
> +static const struct mdio_ops mv88e61xx_mdio_ops = {
> + .read = mv88e61xx_mdio_read,
> + .write = mv88e61xx_mdio_write,
> +};
> +
> +static int mv88e61xx_mdio_bind(struct udevice *dev)
> +{
> + char name[32];
> + static int num_devices;
> +
> + sprintf(name, "mv88e61xx-mdio-%d", num_devices++);
> + device_set_name(dev, name);
> +
> + return 0;
> +}
> +
> +U_BOOT_DRIVER(mv88e61xx_mdio) = {
> + .name = "mv88e61xx_mdio",
> + .id = UCLASS_MDIO,
> + .ops = &mv88e61xx_mdio_ops,
> + .bind = mv88e61xx_mdio_bind,
> + .priv_auto = sizeof(struct mv88e61xx_priv),
> + .plat_auto = sizeof(struct mdio_perdev_priv),
> +};
> +
> +static int mv88e61xx_dsa_port_enable(struct udevice *dev, int port, struct phy_device *phy)
> +{
> + struct dsa_pdata *dsa_pdata = dev_get_uclass_plat(dev);
> + struct mv88e61xx_priv *priv = dev_get_priv(dev);
> + 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));
> +
> + /*
> + * Enable energy-detect sensing on PHY, used to determine when a PHY
> + * port is physically connected
> + */
> + val = mv88e61xx_phy_read(dev, port, PHY_REG_CTRL1);
> + if (val < 0)
> + return val;
> + val = bitfield_replace(val, priv->phy_ctrl1_en_det_shift,
> + priv->phy_ctrl1_en_det_width,
> + priv->phy_ctrl1_en_det_ctrl);
> + val = mv88e61xx_phy_write(dev, port, PHY_REG_CTRL1, val);
> + if (val < 0)
> + return val;
> +
> + /* enable port */
> + val = mv88e61xx_port_read(dev, port, PORT_REG_CTRL);
> + if (val < 0)
> + return val;
> + val = bitfield_replace(val, PORT_REG_CTRL_PSTATE_SHIFT,
> + PORT_REG_CTRL_PSTATE_WIDTH,
> + PORT_REG_CTRL_PSTATE_FORWARD);
> + val = mv88e61xx_port_write(dev, port, PORT_REG_CTRL, val);
> + if (val < 0)
> + return val;
> +
> + /* configure RGMII delays for fixed link */
> + if (phy->phy_id == PHY_FIXED_ID) {
> + /* Physical Control register: Table 62 */
> + val = mv88e61xx_port_read(dev, port, PORT_REG_PHYS_CTRL);
> + 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;
> + val |= BIT(5) | BIT(4); /* Force link */
> + ret = mv88e61xx_port_write(dev, port, PORT_REG_PHYS_CTRL, val);
> + if (ret < 0)
> + return ret;
> +
> + ret = mv88e61xx_fixed_port_setup(dev, port);
> + if (ret < 0)
> + return ret;
> + }
> +
> + if (port == dsa_pdata->cpu_port) {
> + /* Set CPUDest for cpu port */
> + val = mv88e61xx_reg_read(dev, priv->global1, GLOBAL1_MON_CTRL);
> + if (val < 0)
> + return val;
> + val = bitfield_replace(val, GLOBAL1_MON_CTRL_CPUDEST_SHIFT,
> + GLOBAL1_MON_CTRL_CPUDEST_WIDTH, port);
> + val = mv88e61xx_reg_write(dev, priv->global1, GLOBAL1_MON_CTRL, val);
> + if (val < 0)
> + return val;
> +
> + if (mv88e61xx_6352_family(dev)) {
> + /* initialize serdes */
> + val = mv88e61xx_get_cmode(dev, dsa_pdata->cpu_port);
> + if (val < 0)
> + return val;
> + if (val == PORT_REG_STATUS_CMODE_100BASE_X ||
> + val == PORT_REG_STATUS_CMODE_1000BASE_X ||
> + val == PORT_REG_STATUS_CMODE_SGMII) {
> + val = mv88e61xx_serdes_init(dev);
> + if (val < 0)
> + return val;
> + }
> + }
> + }
> +
> + return 0;
> +}
> +
> +static void mv88e61xx_dsa_port_disable(struct udevice *dev, int port, struct phy_device *phy)
> +{
> + int val;
> +
> + dev_dbg(dev, "%s P%d phy:0x%x\n", __func__, port, phy->phy_id);
> +
> + val = mv88e61xx_port_read(dev, port, PORT_REG_CTRL);
> + if (val < 0)
> + return;
> + val = bitfield_replace(val, PORT_REG_CTRL_PSTATE_SHIFT,
> + PORT_REG_CTRL_PSTATE_WIDTH,
> + PORT_REG_CTRL_PSTATE_DISABLED);
> + val = mv88e61xx_port_write(dev, port, PORT_REG_CTRL, val);
> + if (val < 0)
> + return;
> +}
> +
> +static const struct dsa_ops mv88e61xx_dsa_ops = {
> + .port_enable = mv88e61xx_dsa_port_enable,
> + .port_disable = mv88e61xx_dsa_port_disable,
You can drop "dsa" from these names so they become "mv88e6xxx_port_enable"
and "mv88e6xxx_port_disable". In Marvell terminology, a DSA port is a
technical term for a cascade port, and this is not what this is about.
> +};
> +
> +/* bind and probe the switch mdios */
> +static int mv88e61xx_dsa_probe_mdio(struct udevice *dev)
And in general you can drop the "dsa" word from most function names, it
makes them longer with not a lot of benefit.
> +{
> + struct udevice *pdev;
> + ofnode node, mdios;
> + const char *name;
> + int ret;
> +
> + /* bind phy ports of mdios child node to mv88e61xx_mdio device */
> + mdios = dev_read_subnode(dev, "mdios");
> + if (ofnode_valid(mdios)) {
> + ofnode_for_each_subnode(node, mdios) {
> + name = ofnode_get_name(node);
> + ret = device_bind_driver_to_node(dev,
> + "mv88e61xx_mdio",
> + name, node, &pdev);
> + if (ret) {
> + dev_err(dev, "failed to bind %s: %d\n", name, ret);
> + continue;
> + }
> +
> + /* need to probe it as there is no compatible to do so */
> + ret = uclass_get_device_by_ofnode(UCLASS_MDIO, node, &pdev);
> + if (ret) {
> + dev_err(dev, "failed to probe %s: %d\n", name, ret);
> + continue;
> + }
What do you do with this pdev once you get it? Are you missing a device_probe() call?
Also, why "pdev" and not "dev"? What does the "p" stand for?
> + }
> + }
> +
> + /* bind the mdios node to the parent mdio driver */
> + name = ofnode_get_name(mdios);
> + ret = device_bind_driver_to_node(dev,
> + "mv88e61xx_mdio",
> + name, mdios, &pdev);
> + if (ret)
> + dev_err(dev, "failed to bind %s: %d\n", name, ret);
> +
> + /* need to probe it as there is no compatible to do so */
> + ret = uclass_get_device_by_ofnode(UCLASS_MDIO, mdios, &pdev);
> + if (ret)
> + dev_err(dev, "failed to probe %s: %d\n", name, ret);
> +
> + return ret;
I think this after the "if (ofnode_valid(mdios))" check is all stray
code that should be removed. There is no udevice that should be bound to
the "mdios" node, that is just a container.
That, plus you should try to reduce the indentation by one level by
exiting early if (!ofnode_valid(mdio)) (and not with an error, it is
completely valid to not have an MDIO controller described in DT).
> +}
> +
> +static int mv88e61xx_dsa_probe(struct udevice *dev)
> +{
> + struct mv88e61xx_priv *priv = dev_get_priv(dev);
> + struct udevice *master = dsa_get_master(dev);
> + int ret;
> +
> + if (!master)
> + return -ENODEV;
> +
> + dev_dbg(dev, "%s master:%s\n", __func__, master->name);
> +
> + /* probe internal mdio bus */
> + ret = mv88e61xx_dsa_probe_mdio(dev);
> + if (ret)
> + return ret;
> +
> + ret = mv88e61xx_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;
> + priv->phy_ctrl1_en_det_shift = 8;
> + priv->phy_ctrl1_en_det_width = 2;
> + priv->phy_ctrl1_en_det_ctrl =
> + PHY_REG_CTRL1_ENERGY_DET_SENSE_XMIT;
> + 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:
> + priv->port_count = 7;
> + priv->phy_ctrl1_en_det_shift = 14;
> + priv->phy_ctrl1_en_det_width = 1;
> + priv->phy_ctrl1_en_det_ctrl =
> + PHY_REG_CTRL1_ENERGY_DET_SENSE_PULSE;
> + break;
> + default:
> + return -ENODEV;
> + }
> +
> + ret = mv88e61xx_switch_reset(dev);
> + if (ret < 0)
> + return ret;
> +
> + dsa_set_tagging(dev, 0, 0);
> +
> + return 0;
> +}
> +
> +static const struct udevice_id mv88e61xx_ids[] = {
> + { .compatible = "marvell,mv88e6085" },
> + { }
> +};
> +
> +U_BOOT_DRIVER(mv88e61xx) = {
> + .name = "mv88e61xx",
> + .id = UCLASS_DSA,
> + .of_match = mv88e61xx_ids,
> + .probe = mv88e61xx_dsa_probe,
> + .ops = &mv88e61xx_dsa_ops,
> + .priv_auto = sizeof(struct mv88e61xx_priv),
> +};
> --
> 2.17.1
>
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