drivers/net/dsa/mv88e6131.c - kernel/lockdown - Git at Google

 /*
  * 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");
	/*
	* 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");