With this it is possible to mark certain chip ports as invalid. This is required for example for the MV88E6220 (which is in general a MV88E6250 with 7 ports) but the ports 2-4 are not routed to pins.
If a user configures an invalid port, an error is returned. Signed-off-by: Hubert Feurstein <[email protected]> --- drivers/net/dsa/mv88e6xxx/chip.c | 9 +++++++++ drivers/net/dsa/mv88e6xxx/chip.h | 10 ++++++++++ 2 files changed, 19 insertions(+) diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c index c8c176da0f1c..9fdcc21f0858 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -2469,6 +2469,14 @@ static int mv88e6xxx_setup(struct dsa_switch *ds) /* Setup Switch Port Registers */ for (i = 0; i < mv88e6xxx_num_ports(chip); i++) { + /* Prevent the use of an invalid port. */ + if (mv88e6xxx_is_invalid_port(chip, i) && + !dsa_is_unused_port(ds, i)) { + dev_err(chip->dev, "port %d is invalid\n", i); + err = -EINVAL; + goto unlock; + } + if (dsa_is_unused_port(ds, i)) { err = mv88e6xxx_port_set_state(chip, i, BR_STATE_DISABLED); @@ -4270,6 +4278,7 @@ static const struct mv88e6xxx_info mv88e6xxx_table[] = { */ .num_ports = 7, .num_internal_phys = 2, + .invalid_port_mask = BIT(2) | BIT(3) | BIT(4), .max_vid = 4095, .port_base_addr = 0x08, .phy_base_addr = 0x00, diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h index 2cc508a1cc32..359d258d7151 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.h +++ b/drivers/net/dsa/mv88e6xxx/chip.h @@ -106,6 +106,11 @@ struct mv88e6xxx_info { unsigned int g2_irqs; bool pvt; + /* Mark certain ports as invalid. This is required for example for the + * MV88E6220 (which is in general a MV88E6250 with 7 ports) but the + * ports 2-4 are not routet to pins. + */ + unsigned int invalid_port_mask; /* Multi-chip Addressing Mode. * Some chips respond to only 2 registers of its own SMI device address * when it is non-zero, and use indirect access to internal registers. @@ -571,6 +576,11 @@ static inline unsigned int mv88e6xxx_num_gpio(struct mv88e6xxx_chip *chip) return chip->info->num_gpio; } +static inline bool mv88e6xxx_is_invalid_port(struct mv88e6xxx_chip *chip, int port) +{ + return (chip->info->invalid_port_mask & BIT(port)) != 0; +} + int mv88e6xxx_read(struct mv88e6xxx_chip *chip, int addr, int reg, u16 *val); int mv88e6xxx_write(struct mv88e6xxx_chip *chip, int addr, int reg, u16 val); int mv88e6xxx_update(struct mv88e6xxx_chip *chip, int addr, int reg, -- 2.22.0
