drivers/net/dsa/mv88e6352.c - kernel/bruno - Git at Google

 /*
  * net/dsa/mv88e6352.c - Marvell 88e6352 switch chip support
  *
  * Copyright (c) 2014 Guenter Roeck
  *
  * Derived from mv88e6123_61_65.c
  * 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/platform_device.h>
 #include <linux/phy.h>
 #include <net/dsa.h>
 #include "mv88e6xxx.h"

 static const struct mv88e6xxx_switch_id mv88e6352_table[] = {
 	{ PORT_SWITCH_ID_6172, "Marvell 88E6172" },
 	{ PORT_SWITCH_ID_6176, "Marvell 88E6176" },
 	{ PORT_SWITCH_ID_6320, "Marvell 88E6320" },
 	{ PORT_SWITCH_ID_6320_A1, "Marvell 88E6320 (A1)" },
 	{ PORT_SWITCH_ID_6320_A2, "Marvell 88e6320 (A2)" },
 	{ PORT_SWITCH_ID_6321, "Marvell 88E6321" },
 	{ PORT_SWITCH_ID_6321_A1, "Marvell 88E6321 (A1)" },
 	{ PORT_SWITCH_ID_6321_A2, "Marvell 88e6321 (A2)" },
 	{ PORT_SWITCH_ID_6352, "Marvell 88E6352" },
 	{ PORT_SWITCH_ID_6352_A0, "Marvell 88E6352 (A0)" },
 	{ PORT_SWITCH_ID_6352_A1, "Marvell 88E6352 (A1)" },
 };

 static char *mv88e6352_probe(struct device *host_dev, int sw_addr)
 {
 	return mv88e6xxx_lookup_name(host_dev, sw_addr, mv88e6352_table,
 				     ARRAY_SIZE(mv88e6352_table));
 }

 static int mv88e6352_setup_global(struct dsa_switch *ds)
 {
 	u32 upstream_port = dsa_upstream_port(ds);
 	int ret;
 	u32 reg;

 	ret = mv88e6xxx_setup_global(ds);
 	if (ret)
 		return ret;

 	/* Discard packets with excessive collisions,
 	 * mask all interrupt sources, enable PPU (bit 14, undocumented).
 	 */
 	REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL,
 		  GLOBAL_CONTROL_PPU_ENABLE | GLOBAL_CONTROL_DISCARD_EXCESS);

 	/* Configure the upstream port, and configure the upstream
 	 * port as the port to which ingress and egress monitor frames
 	 * are to be sent.
 	 */
 	reg = upstream_port << GLOBAL_MONITOR_CONTROL_INGRESS_SHIFT |
 		upstream_port << GLOBAL_MONITOR_CONTROL_EGRESS_SHIFT |
 		upstream_port << GLOBAL_MONITOR_CONTROL_ARP_SHIFT;
 	REG_WRITE(REG_GLOBAL, GLOBAL_MONITOR_CONTROL, reg);

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

 	return 0;
 }

 static int mv88e6352_setup(struct dsa_switch *ds)
 {
 	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
 	int ret;

 	ret = mv88e6xxx_setup_common(ds);
 	if (ret < 0)
 		return ret;

 	ps->num_ports = 7;

 	mutex_init(&ps->eeprom_mutex);

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

 	ret = mv88e6352_setup_global(ds);
 	if (ret < 0)
 		return ret;

 	return mv88e6xxx_setup_ports(ds);
 }

 static int mv88e6352_read_eeprom_word(struct dsa_switch *ds, int addr)
 {
 	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
 	int ret;

 	mutex_lock(&ps->eeprom_mutex);

 	ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP,
 				  GLOBAL2_EEPROM_OP_READ |
 				  (addr & GLOBAL2_EEPROM_OP_ADDR_MASK));
 	if (ret < 0)
 		goto error;

 	ret = mv88e6xxx_eeprom_busy_wait(ds);
 	if (ret < 0)
 		goto error;

 	ret = mv88e6xxx_reg_read(ds, REG_GLOBAL2, GLOBAL2_EEPROM_DATA);
 error:
 	mutex_unlock(&ps->eeprom_mutex);
 	return ret;
 }

 static int mv88e6352_get_eeprom(struct dsa_switch *ds,
 				struct ethtool_eeprom *eeprom, u8 *data)
 {
 	int offset;
 	int len;
 	int ret;

 	offset = eeprom->offset;
 	len = eeprom->len;
 	eeprom->len = 0;

 	eeprom->magic = 0xc3ec4951;

 	ret = mv88e6xxx_eeprom_load_wait(ds);
 	if (ret < 0)
 		return ret;

 	if (offset & 1) {
 		int word;

 		word = mv88e6352_read_eeprom_word(ds, offset >> 1);
 		if (word < 0)
 			return word;

 		*data++ = (word >> 8) & 0xff;

 		offset++;
 		len--;
 		eeprom->len++;
 	}

 	while (len >= 2) {
 		int word;

 		word = mv88e6352_read_eeprom_word(ds, offset >> 1);
 		if (word < 0)
 			return word;

 		*data++ = word & 0xff;
 		*data++ = (word >> 8) & 0xff;

 		offset += 2;
 		len -= 2;
 		eeprom->len += 2;
 	}

 	if (len) {
 		int word;

 		word = mv88e6352_read_eeprom_word(ds, offset >> 1);
 		if (word < 0)
 			return word;

 		*data++ = word & 0xff;

 		offset++;
 		len--;
 		eeprom->len++;
 	}

 	return 0;
 }

 static int mv88e6352_eeprom_is_readonly(struct dsa_switch *ds)
 {
 	int ret;

 	ret = mv88e6xxx_reg_read(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP);
 	if (ret < 0)
 		return ret;

 	if (!(ret & GLOBAL2_EEPROM_OP_WRITE_EN))
 		return -EROFS;

 	return 0;
 }

 static int mv88e6352_write_eeprom_word(struct dsa_switch *ds, int addr,
 				       u16 data)
 {
 	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
 	int ret;

 	mutex_lock(&ps->eeprom_mutex);

 	ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_DATA, data);
 	if (ret < 0)
 		goto error;

 	ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP,
 				  GLOBAL2_EEPROM_OP_WRITE |
 				  (addr & GLOBAL2_EEPROM_OP_ADDR_MASK));
 	if (ret < 0)
 		goto error;

 	ret = mv88e6xxx_eeprom_busy_wait(ds);
 error:
 	mutex_unlock(&ps->eeprom_mutex);
 	return ret;
 }

 static int mv88e6352_set_eeprom(struct dsa_switch *ds,
 				struct ethtool_eeprom *eeprom, u8 *data)
 {
 	int offset;
 	int ret;
 	int len;

 	if (eeprom->magic != 0xc3ec4951)
 		return -EINVAL;

 	ret = mv88e6352_eeprom_is_readonly(ds);
 	if (ret)
 		return ret;

 	offset = eeprom->offset;
 	len = eeprom->len;
 	eeprom->len = 0;

 	ret = mv88e6xxx_eeprom_load_wait(ds);
 	if (ret < 0)
 		return ret;

 	if (offset & 1) {
 		int word;

 		word = mv88e6352_read_eeprom_word(ds, offset >> 1);
 		if (word < 0)
 			return word;

 		word = (*data++ << 8) | (word & 0xff);

 		ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word);
 		if (ret < 0)
 			return ret;

 		offset++;
 		len--;
 		eeprom->len++;
 	}

 	while (len >= 2) {
 		int word;

 		word = *data++;
 		word |= *data++ << 8;

 		ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word);
 		if (ret < 0)
 			return ret;

 		offset += 2;
 		len -= 2;
 		eeprom->len += 2;
 	}

 	if (len) {
 		int word;

 		word = mv88e6352_read_eeprom_word(ds, offset >> 1);
 		if (word < 0)
 			return word;

 		word = (word & 0xff00) | *data++;

 		ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word);
 		if (ret < 0)
 			return ret;

 		offset++;
 		len--;
 		eeprom->len++;
 	}

 	return 0;
 }

 struct dsa_switch_driver mv88e6352_switch_driver = {
 	.tag_protocol		= DSA_TAG_PROTO_EDSA,
 	.priv_size		= sizeof(struct mv88e6xxx_priv_state),
 	.probe			= mv88e6352_probe,
 	.setup			= mv88e6352_setup,
 	.set_addr		= mv88e6xxx_set_addr_indirect,
 	.phy_read		= mv88e6xxx_phy_read_indirect,
 	.phy_write		= mv88e6xxx_phy_write_indirect,
 	.get_strings		= mv88e6xxx_get_strings,
 	.get_ethtool_stats	= mv88e6xxx_get_ethtool_stats,
 	.get_sset_count		= mv88e6xxx_get_sset_count,
 	.adjust_link		= mv88e6xxx_adjust_link,
 	.set_eee		= mv88e6xxx_set_eee,
 	.get_eee		= mv88e6xxx_get_eee,
 #ifdef CONFIG_NET_DSA_HWMON
 	.get_temp		= mv88e6xxx_get_temp,
 	.get_temp_limit		= mv88e6xxx_get_temp_limit,
 	.set_temp_limit		= mv88e6xxx_set_temp_limit,
 	.get_temp_alarm		= mv88e6xxx_get_temp_alarm,
 #endif
 	.get_eeprom		= mv88e6352_get_eeprom,
 	.set_eeprom		= mv88e6352_set_eeprom,
 	.get_regs_len		= mv88e6xxx_get_regs_len,
 	.get_regs		= mv88e6xxx_get_regs,
 	.port_join_bridge	= mv88e6xxx_port_bridge_join,
 	.port_leave_bridge	= mv88e6xxx_port_bridge_leave,
 	.port_stp_update	= mv88e6xxx_port_stp_update,
 	.port_pvid_get		= mv88e6xxx_port_pvid_get,
 	.port_vlan_prepare	= mv88e6xxx_port_vlan_prepare,
 	.port_vlan_add		= mv88e6xxx_port_vlan_add,
 	.port_vlan_del		= mv88e6xxx_port_vlan_del,
 	.vlan_getnext		= mv88e6xxx_vlan_getnext,
 	.port_fdb_prepare	= mv88e6xxx_port_fdb_prepare,
 	.port_fdb_add		= mv88e6xxx_port_fdb_add,
 	.port_fdb_del		= mv88e6xxx_port_fdb_del,
 	.port_fdb_dump		= mv88e6xxx_port_fdb_dump,
 };

 MODULE_ALIAS("platform:mv88e6172");
 MODULE_ALIAS("platform:mv88e6176");
 MODULE_ALIAS("platform:mv88e6320");
 MODULE_ALIAS("platform:mv88e6321");
 MODULE_ALIAS("platform:mv88e6352");
	/*
	* net/dsa/mv88e6352.c - Marvell 88e6352 switch chip support
	*
	* Copyright (c) 2014 Guenter Roeck
	*
	* Derived from mv88e6123_61_65.c
	* 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/platform_device.h>
	#include <linux/phy.h>
	#include <net/dsa.h>
	#include "mv88e6xxx.h"

	static const struct mv88e6xxx_switch_id mv88e6352_table[] = {
	{ PORT_SWITCH_ID_6172, "Marvell 88E6172" },
	{ PORT_SWITCH_ID_6176, "Marvell 88E6176" },
	{ PORT_SWITCH_ID_6320, "Marvell 88E6320" },
	{ PORT_SWITCH_ID_6320_A1, "Marvell 88E6320 (A1)" },
	{ PORT_SWITCH_ID_6320_A2, "Marvell 88e6320 (A2)" },
	{ PORT_SWITCH_ID_6321, "Marvell 88E6321" },
	{ PORT_SWITCH_ID_6321_A1, "Marvell 88E6321 (A1)" },
	{ PORT_SWITCH_ID_6321_A2, "Marvell 88e6321 (A2)" },
	{ PORT_SWITCH_ID_6352, "Marvell 88E6352" },
	{ PORT_SWITCH_ID_6352_A0, "Marvell 88E6352 (A0)" },
	{ PORT_SWITCH_ID_6352_A1, "Marvell 88E6352 (A1)" },
	};

	static char mv88e6352_probe(struct device host_dev, int sw_addr)
	{
	return mv88e6xxx_lookup_name(host_dev, sw_addr, mv88e6352_table,
	ARRAY_SIZE(mv88e6352_table));
	}

	static int mv88e6352_setup_global(struct dsa_switch *ds)
	{
	u32 upstream_port = dsa_upstream_port(ds);
	int ret;
	u32 reg;

	ret = mv88e6xxx_setup_global(ds);
	if (ret)
	return ret;

	/* Discard packets with excessive collisions,
	* mask all interrupt sources, enable PPU (bit 14, undocumented).
	*/
	REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL,
	GLOBAL_CONTROL_PPU_ENABLE \| GLOBAL_CONTROL_DISCARD_EXCESS);

	/* Configure the upstream port, and configure the upstream
	* port as the port to which ingress and egress monitor frames
	* are to be sent.
	*/
	reg = upstream_port << GLOBAL_MONITOR_CONTROL_INGRESS_SHIFT \|
	upstream_port << GLOBAL_MONITOR_CONTROL_EGRESS_SHIFT \|
	upstream_port << GLOBAL_MONITOR_CONTROL_ARP_SHIFT;
	REG_WRITE(REG_GLOBAL, GLOBAL_MONITOR_CONTROL, reg);

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

	return 0;
	}

	static int mv88e6352_setup(struct dsa_switch *ds)
	{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;

	ret = mv88e6xxx_setup_common(ds);
	if (ret < 0)
	return ret;

	ps->num_ports = 7;

	mutex_init(&ps->eeprom_mutex);

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

	ret = mv88e6352_setup_global(ds);
	if (ret < 0)
	return ret;

	return mv88e6xxx_setup_ports(ds);
	}

	static int mv88e6352_read_eeprom_word(struct dsa_switch *ds, int addr)
	{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;

	mutex_lock(&ps->eeprom_mutex);

	ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP,
	GLOBAL2_EEPROM_OP_READ \|
	(addr & GLOBAL2_EEPROM_OP_ADDR_MASK));
	if (ret < 0)
	goto error;

	ret = mv88e6xxx_eeprom_busy_wait(ds);
	if (ret < 0)
	goto error;

	ret = mv88e6xxx_reg_read(ds, REG_GLOBAL2, GLOBAL2_EEPROM_DATA);
	error:
	mutex_unlock(&ps->eeprom_mutex);
	return ret;
	}

	static int mv88e6352_get_eeprom(struct dsa_switch *ds,
	struct ethtool_eeprom eeprom, u8 data)
	{
	int offset;
	int len;
	int ret;

	offset = eeprom->offset;
	len = eeprom->len;
	eeprom->len = 0;

	eeprom->magic = 0xc3ec4951;

	ret = mv88e6xxx_eeprom_load_wait(ds);
	if (ret < 0)
	return ret;

	if (offset & 1) {
	int word;

	word = mv88e6352_read_eeprom_word(ds, offset >> 1);
	if (word < 0)
	return word;

	*data++ = (word >> 8) & 0xff;

	offset++;
	len--;
	eeprom->len++;
	}

	while (len >= 2) {
	int word;

	word = mv88e6352_read_eeprom_word(ds, offset >> 1);
	if (word < 0)
	return word;

	*data++ = word & 0xff;
	*data++ = (word >> 8) & 0xff;

	offset += 2;
	len -= 2;
	eeprom->len += 2;
	}

	if (len) {
	int word;

	word = mv88e6352_read_eeprom_word(ds, offset >> 1);
	if (word < 0)
	return word;

	*data++ = word & 0xff;

	offset++;
	len--;
	eeprom->len++;
	}

	return 0;
	}

	static int mv88e6352_eeprom_is_readonly(struct dsa_switch *ds)
	{
	int ret;

	ret = mv88e6xxx_reg_read(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP);
	if (ret < 0)
	return ret;

	if (!(ret & GLOBAL2_EEPROM_OP_WRITE_EN))
	return -EROFS;

	return 0;
	}

	static int mv88e6352_write_eeprom_word(struct dsa_switch *ds, int addr,
	u16 data)
	{
	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
	int ret;

	mutex_lock(&ps->eeprom_mutex);

	ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_DATA, data);
	if (ret < 0)
	goto error;

	ret = mv88e6xxx_reg_write(ds, REG_GLOBAL2, GLOBAL2_EEPROM_OP,
	GLOBAL2_EEPROM_OP_WRITE \|
	(addr & GLOBAL2_EEPROM_OP_ADDR_MASK));
	if (ret < 0)
	goto error;

	ret = mv88e6xxx_eeprom_busy_wait(ds);
	error:
	mutex_unlock(&ps->eeprom_mutex);
	return ret;
	}

	static int mv88e6352_set_eeprom(struct dsa_switch *ds,
	struct ethtool_eeprom eeprom, u8 data)
	{
	int offset;
	int ret;
	int len;

	if (eeprom->magic != 0xc3ec4951)
	return -EINVAL;

	ret = mv88e6352_eeprom_is_readonly(ds);
	if (ret)
	return ret;

	offset = eeprom->offset;
	len = eeprom->len;
	eeprom->len = 0;

	ret = mv88e6xxx_eeprom_load_wait(ds);
	if (ret < 0)
	return ret;

	if (offset & 1) {
	int word;

	word = mv88e6352_read_eeprom_word(ds, offset >> 1);
	if (word < 0)
	return word;

	word = (*data++ << 8) \| (word & 0xff);

	ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word);
	if (ret < 0)
	return ret;

	offset++;
	len--;
	eeprom->len++;
	}

	while (len >= 2) {
	int word;

	word = *data++;
	word \|= *data++ << 8;

	ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word);
	if (ret < 0)
	return ret;

	offset += 2;
	len -= 2;
	eeprom->len += 2;
	}

	if (len) {
	int word;

	word = mv88e6352_read_eeprom_word(ds, offset >> 1);
	if (word < 0)
	return word;

	word = (word & 0xff00) \| *data++;

	ret = mv88e6352_write_eeprom_word(ds, offset >> 1, word);
	if (ret < 0)
	return ret;

	offset++;
	len--;
	eeprom->len++;
	}

	return 0;
	}

	struct dsa_switch_driver mv88e6352_switch_driver = {
	.tag_protocol = DSA_TAG_PROTO_EDSA,
	.priv_size = sizeof(struct mv88e6xxx_priv_state),
	.probe = mv88e6352_probe,
	.setup = mv88e6352_setup,
	.set_addr = mv88e6xxx_set_addr_indirect,
	.phy_read = mv88e6xxx_phy_read_indirect,
	.phy_write = mv88e6xxx_phy_write_indirect,
	.get_strings = mv88e6xxx_get_strings,
	.get_ethtool_stats = mv88e6xxx_get_ethtool_stats,
	.get_sset_count = mv88e6xxx_get_sset_count,
	.adjust_link = mv88e6xxx_adjust_link,
	.set_eee = mv88e6xxx_set_eee,
	.get_eee = mv88e6xxx_get_eee,
	#ifdef CONFIG_NET_DSA_HWMON
	.get_temp = mv88e6xxx_get_temp,
	.get_temp_limit = mv88e6xxx_get_temp_limit,
	.set_temp_limit = mv88e6xxx_set_temp_limit,
	.get_temp_alarm = mv88e6xxx_get_temp_alarm,
	#endif
	.get_eeprom = mv88e6352_get_eeprom,
	.set_eeprom = mv88e6352_set_eeprom,
	.get_regs_len = mv88e6xxx_get_regs_len,
	.get_regs = mv88e6xxx_get_regs,
	.port_join_bridge = mv88e6xxx_port_bridge_join,
	.port_leave_bridge = mv88e6xxx_port_bridge_leave,
	.port_stp_update = mv88e6xxx_port_stp_update,
	.port_pvid_get = mv88e6xxx_port_pvid_get,
	.port_vlan_prepare = mv88e6xxx_port_vlan_prepare,
	.port_vlan_add = mv88e6xxx_port_vlan_add,
	.port_vlan_del = mv88e6xxx_port_vlan_del,
	.vlan_getnext = mv88e6xxx_vlan_getnext,
	.port_fdb_prepare = mv88e6xxx_port_fdb_prepare,
	.port_fdb_add = mv88e6xxx_port_fdb_add,
	.port_fdb_del = mv88e6xxx_port_fdb_del,
	.port_fdb_dump = mv88e6xxx_port_fdb_dump,
	};

	MODULE_ALIAS("platform:mv88e6172");
	MODULE_ALIAS("platform:mv88e6176");
	MODULE_ALIAS("platform:mv88e6320");
	MODULE_ALIAS("platform:mv88e6321");
	MODULE_ALIAS("platform:mv88e6352");