/* * net/dsa/mv88e6060.c - Driver for Marvell 88e6060 switch chips * Copyright (c) 2008-2009 Marvell Semiconductor * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include #include #include #include #include #include #include #include #include "mv88e6060.h" static int reg_read(struct dsa_switch *ds, int addr, int reg) { struct mv88e6060_priv *priv = ds->priv; return mdiobus_read_nested(priv->bus, priv->sw_addr + addr, reg); } #define REG_READ(addr, reg) \ ({ \ int __ret; \ \ __ret = reg_read(ds, addr, reg); \ if (__ret < 0) \ return __ret; \ __ret; \ }) static int reg_write(struct dsa_switch *ds, int addr, int reg, u16 val) { struct mv88e6060_priv *priv = ds->priv; return mdiobus_write_nested(priv->bus, priv->sw_addr + addr, reg, val); } #define REG_WRITE(addr, reg, val) \ ({ \ int __ret; \ \ __ret = reg_write(ds, addr, reg, val); \ if (__ret < 0) \ return __ret; \ }) static const char *mv88e6060_get_name(struct mii_bus *bus, int sw_addr) { int ret; ret = mdiobus_read(bus, sw_addr + REG_PORT(0), PORT_SWITCH_ID); if (ret >= 0) { if (ret == PORT_SWITCH_ID_6060) return "Marvell 88E6060 (A0)"; if (ret == PORT_SWITCH_ID_6060_R1 || ret == PORT_SWITCH_ID_6060_R2) return "Marvell 88E6060 (B0)"; if ((ret & PORT_SWITCH_ID_6060_MASK) == PORT_SWITCH_ID_6060) return "Marvell 88E6060"; } return NULL; } static enum dsa_tag_protocol mv88e6060_get_tag_protocol(struct dsa_switch *ds, int port) { return DSA_TAG_PROTO_TRAILER; } static const char *mv88e6060_drv_probe(struct device *dsa_dev, struct device *host_dev, int sw_addr, void **_priv) { struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev); struct mv88e6060_priv *priv; const char *name; name = mv88e6060_get_name(bus, sw_addr); if (name) { priv = devm_kzalloc(dsa_dev, sizeof(*priv), GFP_KERNEL); if (!priv) return NULL; *_priv = priv; priv->bus = bus; priv->sw_addr = sw_addr; } return name; } static int mv88e6060_switch_reset(struct dsa_switch *ds) { int i; int ret; unsigned long timeout; /* Set all ports to the disabled state. */ for (i = 0; i < MV88E6060_PORTS; i++) { ret = REG_READ(REG_PORT(i), PORT_CONTROL); REG_WRITE(REG_PORT(i), PORT_CONTROL, ret & ~PORT_CONTROL_STATE_MASK); } /* Wait for transmit queues to drain. */ usleep_range(2000, 4000); /* Reset the switch. */ REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL, GLOBAL_ATU_CONTROL_SWRESET | GLOBAL_ATU_CONTROL_LEARNDIS); /* Wait up to one second for reset to complete. */ timeout = jiffies + 1 * HZ; while (time_before(jiffies, timeout)) { ret = REG_READ(REG_GLOBAL, GLOBAL_STATUS); if (ret & GLOBAL_STATUS_INIT_READY) break; usleep_range(1000, 2000); } if (time_after(jiffies, timeout)) return -ETIMEDOUT; return 0; } static int mv88e6060_setup_global(struct dsa_switch *ds) { /* Disable discarding of frames with excessive collisions, * set the maximum frame size to 1536 bytes, and mask all * interrupt sources. */ REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL, GLOBAL_CONTROL_MAX_FRAME_1536); /* Disable automatic address learning. */ REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL, GLOBAL_ATU_CONTROL_LEARNDIS); return 0; } static int mv88e6060_setup_port(struct dsa_switch *ds, int p) { int addr = REG_PORT(p); /* Do not force flow control, disable Ingress and Egress * Header tagging, disable VLAN tunneling, and set the port * state to Forwarding. Additionally, if this is the CPU * port, enable Ingress and Egress Trailer tagging mode. */ REG_WRITE(addr, PORT_CONTROL, dsa_is_cpu_port(ds, p) ? PORT_CONTROL_TRAILER | PORT_CONTROL_INGRESS_MODE | PORT_CONTROL_STATE_FORWARDING : PORT_CONTROL_STATE_FORWARDING); /* Port based VLAN map: give each port its own address * database, allow the CPU port to talk to each of the 'real' * ports, and allow each of the 'real' ports to only talk to * the CPU port. */ REG_WRITE(addr, PORT_VLAN_MAP, ((p & 0xf) << PORT_VLAN_MAP_DBNUM_SHIFT) | (dsa_is_cpu_port(ds, p) ? dsa_user_ports(ds) : BIT(dsa_to_port(ds, p)->cpu_dp->index))); /* Port Association Vector: when learning source addresses * of packets, add the address to the address database using * a port bitmap that has only the bit for this port set and * the other bits clear. */ REG_WRITE(addr, PORT_ASSOC_VECTOR, BIT(p)); return 0; } static int mv88e6060_setup_addr(struct dsa_switch *ds) { u8 addr[ETH_ALEN]; u16 val; eth_random_addr(addr); val = addr[0] << 8 | addr[1]; /* The multicast bit is always transmitted as a zero, so the switch uses * bit 8 for "DiffAddr", where 0 means all ports transmit the same SA. */ val &= 0xfeff; REG_WRITE(REG_GLOBAL, GLOBAL_MAC_01, val); REG_WRITE(REG_GLOBAL, GLOBAL_MAC_23, (addr[2] << 8) | addr[3]); REG_WRITE(REG_GLOBAL, GLOBAL_MAC_45, (addr[4] << 8) | addr[5]); return 0; } static int mv88e6060_setup(struct dsa_switch *ds) { int ret; int i; ret = mv88e6060_switch_reset(ds); if (ret < 0) return ret; /* @@@ initialise atu */ ret = mv88e6060_setup_global(ds); if (ret < 0) return ret; ret = mv88e6060_setup_addr(ds); if (ret < 0) return ret; for (i = 0; i < MV88E6060_PORTS; i++) { ret = mv88e6060_setup_port(ds, i); if (ret < 0) return ret; } return 0; } static int mv88e6060_port_to_phy_addr(int port) { if (port >= 0 && port < MV88E6060_PORTS) return port; return -1; } static int mv88e6060_phy_read(struct dsa_switch *ds, int port, int regnum) { int addr; addr = mv88e6060_port_to_phy_addr(port); if (addr == -1) return 0xffff; return reg_read(ds, addr, regnum); } static int mv88e6060_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val) { int addr; addr = mv88e6060_port_to_phy_addr(port); if (addr == -1) return 0xffff; return reg_write(ds, addr, regnum, val); } static const struct dsa_switch_ops mv88e6060_switch_ops = { .get_tag_protocol = mv88e6060_get_tag_protocol, .probe = mv88e6060_drv_probe, .setup = mv88e6060_setup, .phy_read = mv88e6060_phy_read, .phy_write = mv88e6060_phy_write, }; static struct dsa_switch_driver mv88e6060_switch_drv = { .ops = &mv88e6060_switch_ops, }; static int __init mv88e6060_init(void) { register_switch_driver(&mv88e6060_switch_drv); return 0; } module_init(mv88e6060_init); static void __exit mv88e6060_cleanup(void) { unregister_switch_driver(&mv88e6060_switch_drv); } module_exit(mv88e6060_cleanup); MODULE_AUTHOR("Lennert Buytenhek "); MODULE_DESCRIPTION("Driver for Marvell 88E6060 ethernet switch chip"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:mv88e6060");