diff options
Diffstat (limited to 'kernel/drivers/net/dsa/mv88e6131.c')
| -rw-r--r-- | kernel/drivers/net/dsa/mv88e6131.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/kernel/drivers/net/dsa/mv88e6131.c b/kernel/drivers/net/dsa/mv88e6131.c new file mode 100644 index 000000000..e54824fa0 --- /dev/null +++ b/kernel/drivers/net/dsa/mv88e6131.c @@ -0,0 +1,319 @@ +/* + * net/dsa/mv88e6131.c - Marvell 88e6095/6095f/6131 switch chip support + * 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 <linux/delay.h> +#include <linux/jiffies.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/phy.h> +#include <net/dsa.h> +#include "mv88e6xxx.h" + +static char *mv88e6131_probe(struct device *host_dev, int sw_addr) +{ + struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev); + int ret; + + if (bus == NULL) + return NULL; + + ret = __mv88e6xxx_reg_read(bus, sw_addr, REG_PORT(0), PORT_SWITCH_ID); + if (ret >= 0) { + int ret_masked = ret & 0xfff0; + + if (ret_masked == PORT_SWITCH_ID_6085) + return "Marvell 88E6085"; + if (ret_masked == PORT_SWITCH_ID_6095) + return "Marvell 88E6095/88E6095F"; + if (ret == PORT_SWITCH_ID_6131_B2) + return "Marvell 88E6131 (B2)"; + if (ret_masked == PORT_SWITCH_ID_6131) + return "Marvell 88E6131"; + } + + return NULL; +} + +static int mv88e6131_setup_global(struct dsa_switch *ds) +{ + int ret; + int i; + + /* Enable the PHY polling unit, don't discard packets with + * excessive collisions, use a weighted fair queueing scheme + * to arbitrate between packet queues, set the maximum frame + * size to 1632, and mask all interrupt sources. + */ + REG_WRITE(REG_GLOBAL, 0x04, 0x4400); + + /* Set the default address aging time to 5 minutes, and + * enable address learn messages to be sent to all message + * ports. + */ + REG_WRITE(REG_GLOBAL, 0x0a, 0x0148); + + /* Configure the priority mapping registers. */ + ret = mv88e6xxx_config_prio(ds); + if (ret < 0) + return ret; + + /* Set the VLAN ethertype to 0x8100. */ + REG_WRITE(REG_GLOBAL, 0x19, 0x8100); + + /* Disable ARP mirroring, and configure the upstream port as + * the port to which ingress and egress monitor frames are to + * be sent. + */ + REG_WRITE(REG_GLOBAL, 0x1a, (dsa_upstream_port(ds) * 0x1100) | 0x00f0); + + /* Disable cascade port functionality unless this device + * is used in a cascade configuration, and set the switch's + * DSA device number. + */ + if (ds->dst->pd->nr_chips > 1) + REG_WRITE(REG_GLOBAL, 0x1c, 0xf000 | (ds->index & 0x1f)); + else + REG_WRITE(REG_GLOBAL, 0x1c, 0xe000 | (ds->index & 0x1f)); + + /* Send all frames with destination addresses matching + * 01:80:c2:00:00:0x to the CPU port. + */ + REG_WRITE(REG_GLOBAL2, 0x03, 0xffff); + + /* Ignore removed tag data on doubly tagged packets, disable + * flow control messages, force flow control priority to the + * highest, and send all special multicast frames to the CPU + * port at the highest priority. + */ + REG_WRITE(REG_GLOBAL2, 0x05, 0x00ff); + + /* Program the DSA routing table. */ + for (i = 0; i < 32; i++) { + int nexthop; + + nexthop = 0x1f; + if (ds->pd->rtable && + i != ds->index && i < ds->dst->pd->nr_chips) + nexthop = ds->pd->rtable[i] & 0x1f; + + REG_WRITE(REG_GLOBAL2, 0x06, 0x8000 | (i << 8) | nexthop); + } + + /* Clear all trunk masks. */ + for (i = 0; i < 8; i++) + REG_WRITE(REG_GLOBAL2, 0x07, 0x8000 | (i << 12) | 0x7ff); + + /* Clear all trunk mappings. */ + for (i = 0; i < 16; i++) + REG_WRITE(REG_GLOBAL2, 0x08, 0x8000 | (i << 11)); + + /* Force the priority of IGMP/MLD snoop frames and ARP frames + * to the highest setting. + */ + REG_WRITE(REG_GLOBAL2, 0x0f, 0x00ff); + + return 0; +} + +static int mv88e6131_setup_port(struct dsa_switch *ds, int p) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int addr = REG_PORT(p); + u16 val; + + /* MAC Forcing register: don't force link, speed, duplex + * or flow control state to any particular values on physical + * ports, but force the CPU port and all DSA ports to 1000 Mb/s + * (100 Mb/s on 6085) full duplex. + */ + if (dsa_is_cpu_port(ds, p) || ds->dsa_port_mask & (1 << p)) + if (ps->id == PORT_SWITCH_ID_6085) + REG_WRITE(addr, 0x01, 0x003d); /* 100 Mb/s */ + else + REG_WRITE(addr, 0x01, 0x003e); /* 1000 Mb/s */ + else + REG_WRITE(addr, 0x01, 0x0003); + + /* Port Control: disable Core Tag, disable Drop-on-Lock, + * transmit frames unmodified, disable Header mode, + * enable IGMP/MLD snoop, disable DoubleTag, disable VLAN + * tunneling, determine priority by looking at 802.1p and + * IP priority fields (IP prio has precedence), and set STP + * state to Forwarding. + * + * If this is the upstream port for this switch, enable + * forwarding of unknown unicasts, and enable DSA tagging + * mode. + * + * If this is the link to another switch, use DSA tagging + * mode, but do not enable forwarding of unknown unicasts. + */ + val = 0x0433; + if (p == dsa_upstream_port(ds)) { + val |= 0x0104; + /* On 6085, unknown multicast forward is controlled + * here rather than in Port Control 2 register. + */ + if (ps->id == PORT_SWITCH_ID_6085) + val |= 0x0008; + } + if (ds->dsa_port_mask & (1 << p)) + val |= 0x0100; + REG_WRITE(addr, 0x04, val); + + /* Port Control 2: don't force a good FCS, don't use + * VLAN-based, source address-based or destination + * address-based priority overrides, don't let the switch + * add or strip 802.1q tags, don't discard tagged or + * untagged frames on this port, do a destination address + * lookup on received packets as usual, don't send a copy + * of all transmitted/received frames on this port to the + * CPU, and configure the upstream port number. + * + * If this is the upstream port for this switch, enable + * forwarding of unknown multicast addresses. + */ + if (ps->id == PORT_SWITCH_ID_6085) + /* on 6085, bits 3:0 are reserved, bit 6 control ARP + * mirroring, and multicast forward is handled in + * Port Control register. + */ + REG_WRITE(addr, 0x08, 0x0080); + else { + val = 0x0080 | dsa_upstream_port(ds); + if (p == dsa_upstream_port(ds)) + val |= 0x0040; + REG_WRITE(addr, 0x08, val); + } + + /* Rate Control: disable ingress rate limiting. */ + REG_WRITE(addr, 0x09, 0x0000); + + /* Rate Control 2: disable egress rate limiting. */ + REG_WRITE(addr, 0x0a, 0x0000); + + /* 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, 0x0b, 1 << p); + + /* Tag Remap: use an identity 802.1p prio -> switch prio + * mapping. + */ + REG_WRITE(addr, 0x18, 0x3210); + + /* Tag Remap 2: use an identity 802.1p prio -> switch prio + * mapping. + */ + REG_WRITE(addr, 0x19, 0x7654); + + return mv88e6xxx_setup_port_common(ds, p); +} + +static int mv88e6131_setup(struct dsa_switch *ds) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + int i; + int ret; + + ret = mv88e6xxx_setup_common(ds); + if (ret < 0) + return ret; + + mv88e6xxx_ppu_state_init(ds); + + switch (ps->id) { + case PORT_SWITCH_ID_6085: + ps->num_ports = 10; + break; + case PORT_SWITCH_ID_6095: + ps->num_ports = 11; + break; + case PORT_SWITCH_ID_6131: + case PORT_SWITCH_ID_6131_B2: + ps->num_ports = 8; + break; + default: + return -ENODEV; + } + + ret = mv88e6xxx_switch_reset(ds, false); + if (ret < 0) + return ret; + + /* @@@ initialise vtu and atu */ + + ret = mv88e6131_setup_global(ds); + if (ret < 0) + return ret; + + for (i = 0; i < ps->num_ports; i++) { + ret = mv88e6131_setup_port(ds, i); + if (ret < 0) + return ret; + } + + return 0; +} + +static int mv88e6131_port_to_phy_addr(struct dsa_switch *ds, int port) +{ + struct mv88e6xxx_priv_state *ps = ds_to_priv(ds); + + if (port >= 0 && port < ps->num_ports) + return port; + + return -EINVAL; +} + +static int +mv88e6131_phy_read(struct dsa_switch *ds, int port, int regnum) +{ + int addr = mv88e6131_port_to_phy_addr(ds, port); + + if (addr < 0) + return addr; + + return mv88e6xxx_phy_read_ppu(ds, addr, regnum); +} + +static int +mv88e6131_phy_write(struct dsa_switch *ds, + int port, int regnum, u16 val) +{ + int addr = mv88e6131_port_to_phy_addr(ds, port); + + if (addr < 0) + return addr; + + return mv88e6xxx_phy_write_ppu(ds, addr, regnum, val); +} + +struct dsa_switch_driver mv88e6131_switch_driver = { + .tag_protocol = DSA_TAG_PROTO_DSA, + .priv_size = sizeof(struct mv88e6xxx_priv_state), + .probe = mv88e6131_probe, + .setup = mv88e6131_setup, + .set_addr = mv88e6xxx_set_addr_direct, + .phy_read = mv88e6131_phy_read, + .phy_write = mv88e6131_phy_write, + .poll_link = mv88e6xxx_poll_link, + .get_strings = mv88e6xxx_get_strings, + .get_ethtool_stats = mv88e6xxx_get_ethtool_stats, + .get_sset_count = mv88e6xxx_get_sset_count, +}; + +MODULE_ALIAS("platform:mv88e6085"); +MODULE_ALIAS("platform:mv88e6095"); +MODULE_ALIAS("platform:mv88e6095f"); +MODULE_ALIAS("platform:mv88e6131"); |