drivers/net/dsa/mv88e6171.c - kernel/lockdown - Git at Google

 /* net/dsa/mv88e6171.c - Marvell 88e6171/8826172 switch chip support
  * Copyright (c) 2008-2009 Marvell Semiconductor
  * Copyright (c) 2014 Claudio Leite <leitec@staticky.com>
  *
  * 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 *mv88e6171_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) {
 		if ((ret & 0xfff0) == PORT_SWITCH_ID_6171)
 			return "Marvell 88E6171";
 		if ((ret & 0xfff0) == PORT_SWITCH_ID_6172)
 			return "Marvell 88E6172";
 	}

 	return NULL;
 }

 static int mv88e6171_setup_global(struct dsa_switch *ds)
 {
 	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
 	int ret;
 	int i;

 	/* Discard packets with excessive collisions, mask all
 	 * interrupt sources, enable PPU.
 	 */
 	REG_WRITE(REG_GLOBAL, 0x04, 0x6000);

 	/* 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;

 	/* Configure the upstream port, and configure the upstream
 	 * port as the port to which ingress and egress monitor frames
 	 * are to be sent.
 	 */
 	if (REG_READ(REG_PORT(0), 0x03) == 0x1710)
 		REG_WRITE(REG_GLOBAL, 0x1a, (dsa_upstream_port(ds) * 0x1111));
 	else
 		REG_WRITE(REG_GLOBAL, 0x1a, (dsa_upstream_port(ds) * 0x1110));

 	/* Disable remote management for now, and set the switch's
 	 * DSA device number.
 	 */
 	REG_WRITE(REG_GLOBAL, 0x1c, ds->index & 0x1f);

 	/* Send all frames with destination addresses matching
 	 * 01:80:c2:00:00:2x to the CPU port.
 	 */
 	REG_WRITE(REG_GLOBAL2, 0x02, 0xffff);

 	/* Send all frames with destination addresses matching
 	 * 01:80:c2:00:00:0x to the CPU port.
 	 */
 	REG_WRITE(REG_GLOBAL2, 0x03, 0xffff);

 	/* Disable the loopback filter, disable flow control
 	 * messages, disable flood broadcast override, disable
 	 * removing of provider tags, disable ATU age violation
 	 * interrupts, disable tag flow control, force flow
 	 * control priority to the highest, and send all special
 	 * multicast frames to the CPU 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 (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 < ps->num_ports; i++)
 		REG_WRITE(REG_GLOBAL2, 0x07, 0x8000 | (i << 12) | 0xff);

 	/* Clear all trunk mappings. */
 	for (i = 0; i < 16; i++)
 		REG_WRITE(REG_GLOBAL2, 0x08, 0x8000 | (i << 11));

 	/* Disable ingress rate limiting by resetting all ingress
 	 * rate limit registers to their initial state.
 	 */
 	for (i = 0; i < 6; i++)
 		REG_WRITE(REG_GLOBAL2, 0x09, 0x9000 | (i << 8));

 	/* Initialise cross-chip port VLAN table to reset defaults. */
 	REG_WRITE(REG_GLOBAL2, 0x0b, 0x9000);

 	/* Clear the priority override table. */
 	for (i = 0; i < 16; i++)
 		REG_WRITE(REG_GLOBAL2, 0x0f, 0x8000 | (i << 8));

 	/* @@@ initialise AVB (22/23) watchdog (27) sdet (29) registers */

 	return 0;
 }

 static int mv88e6171_setup_port(struct dsa_switch *ds, int p)
 {
 	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
 	 * full duplex.
 	 */
 	val = REG_READ(addr, 0x01);
 	if (dsa_is_cpu_port(ds, p) || ds->dsa_port_mask & (1 << p))
 		REG_WRITE(addr, 0x01, val | 0x003e);
 	else
 		REG_WRITE(addr, 0x01, val | 0x0003);

 	/* Do not limit the period of time that this port can be
 	 * paused for by the remote end or the period of time that
 	 * this port can pause the remote end.
 	 */
 	REG_WRITE(addr, 0x02, 0x0000);

 	/* Port Control: disable Drop-on-Unlock, disable Drop-on-Lock,
 	 * disable Header mode, enable IGMP/MLD snooping, 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 CPU link, use DSA or EDSA tagging depending
 	 * on which tagging mode was configured.
 	 *
 	 * If this is a link to another switch, use DSA tagging mode.
 	 *
 	 * If this is the upstream port for this switch, enable
 	 * forwarding of unknown unicasts and multicasts.
 	 */
 	val = 0x0433;
 	if (dsa_is_cpu_port(ds, p)) {
 		if (ds->dst->tag_protocol == DSA_TAG_PROTO_EDSA)
 			val |= 0x3300;
 		else
 			val |= 0x0100;
 	}
 	if (ds->dsa_port_mask & (1 << p))
 		val |= 0x0100;
 	if (p == dsa_upstream_port(ds))
 		val |= 0x000c;
 	REG_WRITE(addr, 0x04, val);

 	/* Port Control 2: don't force a good FCS, set the maximum
 	 * frame size to 10240 bytes, 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 all
 	 * received packets as usual, disable ARP mirroring and don't
 	 * send a copy of all transmitted/received frames on this port
 	 * to the CPU.
 	 */
 	REG_WRITE(addr, 0x08, 0x2080);

 	/* Egress rate control: disable egress rate control. */
 	REG_WRITE(addr, 0x09, 0x0001);

 	/* Egress rate control 2: disable egress rate control. */
 	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);

 	/* Port ATU control: disable limiting the number of address
 	 * database entries that this port is allowed to use.
 	 */
 	REG_WRITE(addr, 0x0c, 0x0000);

 	/* Priority Override: disable DA, SA and VTU priority override. */
 	REG_WRITE(addr, 0x0d, 0x0000);

 	/* Port Ethertype: use the Ethertype DSA Ethertype value. */
 	REG_WRITE(addr, 0x0f, ETH_P_EDSA);

 	/* 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 mv88e6171_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;

 	ps->num_ports = 7;

 	ret = mv88e6xxx_switch_reset(ds, true);
 	if (ret < 0)
 		return ret;

 	/* @@@ initialise vtu and atu */

 	ret = mv88e6171_setup_global(ds);
 	if (ret < 0)
 		return ret;

 	for (i = 0; i < ps->num_ports; i++) {
 		if (!(dsa_is_cpu_port(ds, i) || ds->phys_port_mask & (1 << i)))
 			continue;

 		ret = mv88e6171_setup_port(ds, i);
 		if (ret < 0)
 			return ret;
 	}

 	return 0;
 }

 static int mv88e6171_get_eee(struct dsa_switch *ds, int port,
 			     struct ethtool_eee *e)
 {
 	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

 	if (ps->id == PORT_SWITCH_ID_6172)
 		return mv88e6xxx_get_eee(ds, port, e);

 	return -EOPNOTSUPP;
 }

 static int mv88e6171_set_eee(struct dsa_switch *ds, int port,
 			     struct phy_device *phydev, struct ethtool_eee *e)
 {
 	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

 	if (ps->id == PORT_SWITCH_ID_6172)
 		return mv88e6xxx_set_eee(ds, port, phydev, e);

 	return -EOPNOTSUPP;
 }

 struct dsa_switch_driver mv88e6171_switch_driver = {
 	.tag_protocol		= DSA_TAG_PROTO_EDSA,
 	.priv_size		= sizeof(struct mv88e6xxx_priv_state),
 	.probe			= mv88e6171_probe,
 	.setup			= mv88e6171_setup,
 	.set_addr		= mv88e6xxx_set_addr_indirect,
 	.phy_read		= mv88e6xxx_phy_read_indirect,
 	.phy_write		= mv88e6xxx_phy_write_indirect,
 	.poll_link		= mv88e6xxx_poll_link,
 	.get_strings		= mv88e6xxx_get_strings,
 	.get_ethtool_stats	= mv88e6xxx_get_ethtool_stats,
 	.get_sset_count		= mv88e6xxx_get_sset_count,
 	.set_eee		= mv88e6171_set_eee,
 	.get_eee		= mv88e6171_get_eee,
 #ifdef CONFIG_NET_DSA_HWMON
 	.get_temp               = mv88e6xxx_get_temp,
 #endif
 	.get_regs_len		= mv88e6xxx_get_regs_len,
 	.get_regs		= mv88e6xxx_get_regs,
 	.port_join_bridge       = mv88e6xxx_join_bridge,
 	.port_leave_bridge      = mv88e6xxx_leave_bridge,
 	.port_stp_update        = mv88e6xxx_port_stp_update,
 	.fdb_add		= mv88e6xxx_port_fdb_add,
 	.fdb_del		= mv88e6xxx_port_fdb_del,
 	.fdb_getnext		= mv88e6xxx_port_fdb_getnext,
 };

 MODULE_ALIAS("platform:mv88e6171");
 MODULE_ALIAS("platform:mv88e6172");
	/* net/dsa/mv88e6171.c - Marvell 88e6171/8826172 switch chip support
	* Copyright (c) 2008-2009 Marvell Semiconductor
	* Copyright (c) 2014 Claudio Leite <leitec@staticky.com>
	*
	* 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 mv88e6171_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) {
	if ((ret & 0xfff0) == PORT_SWITCH_ID_6171)
	return "Marvell 88E6171";
	if ((ret & 0xfff0) == PORT_SWITCH_ID_6172)
	return "Marvell 88E6172";
	}

	return NULL;
	}

	static int mv88e6171_setup_global(struct dsa_switch *ds)
	{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;
	int i;

	/* Discard packets with excessive collisions, mask all
	* interrupt sources, enable PPU.
	*/
	REG_WRITE(REG_GLOBAL, 0x04, 0x6000);

	/* 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;

	/* Configure the upstream port, and configure the upstream
	* port as the port to which ingress and egress monitor frames
	* are to be sent.
	*/
	if (REG_READ(REG_PORT(0), 0x03) == 0x1710)
	REG_WRITE(REG_GLOBAL, 0x1a, (dsa_upstream_port(ds) * 0x1111));
	else
	REG_WRITE(REG_GLOBAL, 0x1a, (dsa_upstream_port(ds) * 0x1110));

	/* Disable remote management for now, and set the switch's
	* DSA device number.
	*/
	REG_WRITE(REG_GLOBAL, 0x1c, ds->index & 0x1f);

	/* Send all frames with destination addresses matching
	* 01:80:c2:00:00:2x to the CPU port.
	*/
	REG_WRITE(REG_GLOBAL2, 0x02, 0xffff);

	/* Send all frames with destination addresses matching
	* 01:80:c2:00:00:0x to the CPU port.
	*/
	REG_WRITE(REG_GLOBAL2, 0x03, 0xffff);

	/* Disable the loopback filter, disable flow control
	* messages, disable flood broadcast override, disable
	* removing of provider tags, disable ATU age violation
	* interrupts, disable tag flow control, force flow
	* control priority to the highest, and send all special
	* multicast frames to the CPU 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 (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 < ps->num_ports; i++)
	REG_WRITE(REG_GLOBAL2, 0x07, 0x8000 \| (i << 12) \| 0xff);

	/* Clear all trunk mappings. */
	for (i = 0; i < 16; i++)
	REG_WRITE(REG_GLOBAL2, 0x08, 0x8000 \| (i << 11));

	/* Disable ingress rate limiting by resetting all ingress
	* rate limit registers to their initial state.
	*/
	for (i = 0; i < 6; i++)
	REG_WRITE(REG_GLOBAL2, 0x09, 0x9000 \| (i << 8));

	/* Initialise cross-chip port VLAN table to reset defaults. */
	REG_WRITE(REG_GLOBAL2, 0x0b, 0x9000);

	/* Clear the priority override table. */
	for (i = 0; i < 16; i++)
	REG_WRITE(REG_GLOBAL2, 0x0f, 0x8000 \| (i << 8));

	/* @@@ initialise AVB (22/23) watchdog (27) sdet (29) registers */

	return 0;
	}

	static int mv88e6171_setup_port(struct dsa_switch *ds, int p)
	{
	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
	* full duplex.
	*/
	val = REG_READ(addr, 0x01);
	if (dsa_is_cpu_port(ds, p) \|\| ds->dsa_port_mask & (1 << p))
	REG_WRITE(addr, 0x01, val \| 0x003e);
	else
	REG_WRITE(addr, 0x01, val \| 0x0003);

	/* Do not limit the period of time that this port can be
	* paused for by the remote end or the period of time that
	* this port can pause the remote end.
	*/
	REG_WRITE(addr, 0x02, 0x0000);

	/* Port Control: disable Drop-on-Unlock, disable Drop-on-Lock,
	* disable Header mode, enable IGMP/MLD snooping, 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 CPU link, use DSA or EDSA tagging depending
	* on which tagging mode was configured.
	*
	* If this is a link to another switch, use DSA tagging mode.
	*
	* If this is the upstream port for this switch, enable
	* forwarding of unknown unicasts and multicasts.
	*/
	val = 0x0433;
	if (dsa_is_cpu_port(ds, p)) {
	if (ds->dst->tag_protocol == DSA_TAG_PROTO_EDSA)
	val \|= 0x3300;
	else
	val \|= 0x0100;
	}
	if (ds->dsa_port_mask & (1 << p))
	val \|= 0x0100;
	if (p == dsa_upstream_port(ds))
	val \|= 0x000c;
	REG_WRITE(addr, 0x04, val);

	/* Port Control 2: don't force a good FCS, set the maximum
	* frame size to 10240 bytes, 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 all
	* received packets as usual, disable ARP mirroring and don't
	* send a copy of all transmitted/received frames on this port
	* to the CPU.
	*/
	REG_WRITE(addr, 0x08, 0x2080);

	/* Egress rate control: disable egress rate control. */
	REG_WRITE(addr, 0x09, 0x0001);

	/* Egress rate control 2: disable egress rate control. */
	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);

	/* Port ATU control: disable limiting the number of address
	* database entries that this port is allowed to use.
	*/
	REG_WRITE(addr, 0x0c, 0x0000);

	/* Priority Override: disable DA, SA and VTU priority override. */
	REG_WRITE(addr, 0x0d, 0x0000);

	/* Port Ethertype: use the Ethertype DSA Ethertype value. */
	REG_WRITE(addr, 0x0f, ETH_P_EDSA);

	/* 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 mv88e6171_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;

	ps->num_ports = 7;

	ret = mv88e6xxx_switch_reset(ds, true);
	if (ret < 0)
	return ret;

	/* @@@ initialise vtu and atu */

	ret = mv88e6171_setup_global(ds);
	if (ret < 0)
	return ret;

	for (i = 0; i < ps->num_ports; i++) {
	if (!(dsa_is_cpu_port(ds, i) \|\| ds->phys_port_mask & (1 << i)))
	continue;

	ret = mv88e6171_setup_port(ds, i);
	if (ret < 0)
	return ret;
	}

	return 0;
	}

	static int mv88e6171_get_eee(struct dsa_switch *ds, int port,
	struct ethtool_eee *e)
	{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

	if (ps->id == PORT_SWITCH_ID_6172)
	return mv88e6xxx_get_eee(ds, port, e);

	return -EOPNOTSUPP;
	}

	static int mv88e6171_set_eee(struct dsa_switch *ds, int port,
	struct phy_device phydev, struct ethtool_eee e)
	{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

	if (ps->id == PORT_SWITCH_ID_6172)
	return mv88e6xxx_set_eee(ds, port, phydev, e);

	return -EOPNOTSUPP;
	}

	struct dsa_switch_driver mv88e6171_switch_driver = {
	.tag_protocol = DSA_TAG_PROTO_EDSA,
	.priv_size = sizeof(struct mv88e6xxx_priv_state),
	.probe = mv88e6171_probe,
	.setup = mv88e6171_setup,
	.set_addr = mv88e6xxx_set_addr_indirect,
	.phy_read = mv88e6xxx_phy_read_indirect,
	.phy_write = mv88e6xxx_phy_write_indirect,
	.poll_link = mv88e6xxx_poll_link,
	.get_strings = mv88e6xxx_get_strings,
	.get_ethtool_stats = mv88e6xxx_get_ethtool_stats,
	.get_sset_count = mv88e6xxx_get_sset_count,
	.set_eee = mv88e6171_set_eee,
	.get_eee = mv88e6171_get_eee,
	#ifdef CONFIG_NET_DSA_HWMON
	.get_temp = mv88e6xxx_get_temp,
	#endif
	.get_regs_len = mv88e6xxx_get_regs_len,
	.get_regs = mv88e6xxx_get_regs,
	.port_join_bridge = mv88e6xxx_join_bridge,
	.port_leave_bridge = mv88e6xxx_leave_bridge,
	.port_stp_update = mv88e6xxx_port_stp_update,
	.fdb_add = mv88e6xxx_port_fdb_add,
	.fdb_del = mv88e6xxx_port_fdb_del,
	.fdb_getnext = mv88e6xxx_port_fdb_getnext,
	};

	MODULE_ALIAS("platform:mv88e6171");
	MODULE_ALIAS("platform:mv88e6172");