Marvell MV88E61XX Switch Driver support

Chips supported:-
1. 88E6161 6 port gbe swtich with 5 integrated PHYs
2. 88E6165 6 port gbe swtich with 5 integrated PHYs
2. 88E6132 3 port gbe swtich with 2 integrated PHYs
Platform specific configuration supported for:-
default or router port vlan configuration
led_init configuration
mdip/n polarity reversal configuration

Note: This driver is supported and tested against
kirkwood egiga interface

Contributors:
Yotam Admon <yotam@marvell.com>
Michael Blostein <michaelbl@marvell.com

Reviewed by: Ronen Shitrit <rshitrit@marvell.com>
Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

1 files changed, 413 insertions, 0 deletions

diff --git a/drivers/net/phy/mv88e61xx.c b/drivers/net/phy/mv88e61xx.c
new file mode 100644
index 0000000..ec47286
--- /dev/null
+++ b/drivers/net/phy/mv88e61xx.c
@@ -0,0 +1,413 @@
+/*
+ * (C) Copyright 2009
+ * Marvell Semiconductor <www.marvell.com>
+ * Prafulla Wadaskar <prafulla@marvell.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <common.h>
+#include <netdev.h>
+#include "mv88e61xx.h"
+
+#ifdef CONFIG_MV88E61XX_MULTICHIP_ADRMODE
+/* Chip Address mode
+ * The Switch support two modes of operation
+ * 1. single chip mode and
+ * 2. Multi-chip mode
+ * Refer section 9.2 &9.3 in chip datasheet-02 for more details
+ *
+ * By default single chip mode is configured
+ * multichip mode operation can be configured in board header
+ */
+static int mv88e61xx_busychk_multic(u32 devaddr)
+{
+	u32 reg = 0;
+	u32 timeout = MV88E61XX_PHY_TIMEOUT;
+
+	/* Poll till SMIBusy bit is clear */
+	do {
+		miiphy_read(name, devaddr, 0x0, &reg);
+		if (timeout-- == 0) {
+			printf("SMI busy timeout\n");
+			return -1;
+		}
+	} while (reg & (1 << 15));
+	return 0;
+}
+
+static void mv88e61xx_wr_phy(char *name, u32 phy_adr, u32 reg_ofs, u16 data)
+{
+	u16 reg;
+	u32 mii_dev_addr;
+
+	/* command to read PHY dev address */
+	if (!miiphy_read(name, 0xEE, 0xEE, &mii_dev_addr)) {
+		printf("Error..could not read PHY dev address\n");
+		return;
+	}
+	mv88e61xx_busychk_multic(mii_dev_addr);
+	/* Write data to Switch indirect data register */
+	miiphy_write(name, mii_dev_addr, 0x1, data);
+	/* Write command to Switch indirect command register (write) */
+	miiphy_write(name, mii_dev_addr, 0x0,
+		     reg_ofs | (phy_adr << 5) | (1 << 10) | (1 << 12) | (1 <<
+									 15));
+}
+
+static void mv88e61xx_rd_phy(char *name, u32 phy_adr, u32 reg_ofs, u16 * data)
+{
+	u16 reg;
+	u32 mii_dev_addr;
+
+	/* command to read PHY dev address */
+	if (!miiphy_read(name, 0xEE, 0xEE, &mii_dev_addr)) {
+		printf("Error..could not read PHY dev address\n");
+		return;
+	}
+	mv88e61xx_busychk_multic(mii_dev_addr);
+	/* Write command to Switch indirect command register (read) */
+	miiphy_write(name, mii_dev_addr, 0x0,
+		     reg_ofs | (phy_adr << 5) | (1 << 10) | (1 << 12) | (1 <<
+									 15));
+	mv88e61xx_busychk_multic(mii_dev_addr);
+	/* Read data from Switch indirect data register */
+	miiphy_read(name, mii_dev_addr, 0x1, (u16 *) & data);
+}
+#endif /* CONFIG_MV88E61XX_MULTICHIP_ADRMODE */
+
+static void mv88e61xx_port_vlan_config(struct mv88e61xx_config *swconfig,
+				       u32 max_prtnum, u32 ports_ofs)
+{
+	u32 prt;
+	u16 reg;
+	char *name = swconfig->name;
+	u32 cpu_port = swconfig->cpuport;
+	u32 port_mask = swconfig->ports_enabled;
+	enum mv88e61xx_cfg_vlan vlancfg = swconfig->vlancfg;
+
+	/* be sure all ports are disabled */
+	for (prt = 0; prt < max_prtnum; prt++) {
+		RD_PHY(name, ports_ofs + prt, MV88E61XX_PRT_CTRL_REG, &reg);
+		reg &= ~0x3;
+		WR_PHY(name, ports_ofs + prt, MV88E61XX_PRT_CTRL_REG, reg);
+
+		if (!(cpu_port & (1 << prt)))
+			continue;
+		/* Set CPU port VID to 0x1 */
+		RD_PHY(name, (ports_ofs + prt), MV88E61XX_PRT_VID_REG, &reg);
+		reg &= ~0xfff;
+		reg |= 0x1;
+		WR_PHY(name, (ports_ofs + prt), MV88E61XX_PRT_VID_REG, reg);
+	}
+
+	/* Setting  Port default priority for all ports to zero */
+	for (prt = 0; prt < max_prtnum; prt++) {
+		RD_PHY(name, ports_ofs + prt, MV88E61XX_PRT_VID_REG, &reg);
+		reg &= ~0xc000;
+		WR_PHY(name, ports_ofs + prt, MV88E61XX_PRT_VID_REG, reg);
+	}
+	/* Setting VID and VID map for all ports except CPU port */
+	for (prt = 0; prt < max_prtnum; prt++) {
+		/* only for enabled ports */
+		if ((1 << prt) & port_mask) {
+			/* skip CPU port */
+			if ((1 << prt) & cpu_port) {
+				/*
+				 * Set Vlan map table for cpu_port to see
+				 * all ports
+				 */
+				RD_PHY(name, (ports_ofs + prt),
+				       MV88E61XX_PRT_VMAP_REG, &reg);
+				reg &= ~((1 << max_prtnum) - 1);
+				reg |= port_mask & ~(1 << prt);
+				WR_PHY(name, (ports_ofs + prt),
+				       MV88E61XX_PRT_VMAP_REG, reg);
+			} else {
+
+				/*
+				 *  set Ports VLAN Mapping.
+				 *      port prt <--> cpu_port VLAN #prt+1.
+				 */
+				RD_PHY(name, ports_ofs + prt,
+				       MV88E61XX_PRT_VID_REG, &reg);
+				reg &= ~0x0fff;
+				reg |= (prt + 1);
+				WR_PHY(name, ports_ofs + prt,
+				       MV88E61XX_PRT_VID_REG, reg);
+
+				RD_PHY(name, ports_ofs + prt,
+				       MV88E61XX_PRT_VMAP_REG, &reg);
+				if (vlancfg == MV88E61XX_VLANCFG_DEFAULT) {
+					/*
+					 * all any port can send frames to all other ports
+					 * ref: sec 3.2.1.1 of datasheet
+					 */
+					reg |= 0x03f;
+					reg &= ~(1 << prt);
+				} else if (vlancfg == MV88E61XX_VLANCFG_ROUTER) {
+					/*
+					 * all other ports can send frames to CPU port only
+					 * ref: sec 3.2.1.2 of datasheet
+					 */
+					reg &= ~((1 << max_prtnum) - 1);
+					reg |= cpu_port;
+				}
+				WR_PHY(name, ports_ofs + prt,
+				       MV88E61XX_PRT_VMAP_REG, reg);
+			}
+		}
+	}
+
+	/*
+	 * enable only appropriate ports to forwarding mode
+	 * and disable the others
+	 */
+	for (prt = 0; prt < max_prtnum; prt++) {
+		if ((1 << prt) & port_mask) {
+			RD_PHY(name, ports_ofs + prt,
+			       MV88E61XX_PRT_CTRL_REG, &reg);
+			reg |= 0x3;
+			WR_PHY(name, ports_ofs + prt,
+			       MV88E61XX_PRT_CTRL_REG, reg);
+		} else {
+			/* Disable port */
+			RD_PHY(name, ports_ofs + prt,
+			       MV88E61XX_PRT_CTRL_REG, &reg);
+			reg &= ~0x3;
+			WR_PHY(name, ports_ofs + prt,
+			       MV88E61XX_PRT_CTRL_REG, reg);
+		}
+	}
+}
+
+/*
+ * Make sure SMIBusy bit cleared before another
+ * SMI operation can take place
+ */
+static int mv88e61xx_busychk(char *name)
+{
+	u32 reg = 0;
+	u32 timeout = MV88E61XX_PHY_TIMEOUT;
+	do {
+		RD_PHY(name, MV88E61XX_GLB2REG_DEVADR,
+		       MV88E61XX_PHY_CMD, (u16 *) & reg);
+		if (timeout-- == 0) {
+			printf("SMI busy timeout\n");
+			return -1;
+		}
+	} while (reg & 1 << 28);	/* busy mask */
+	return 0;
+}
+
+/*
+ * Power up the specified port and reset PHY
+ */
+static int mv88361xx_powerup(struct mv88e61xx_config *swconfig, u32 prt)
+{
+	char *name = swconfig->name;
+
+	/* Write Copper Specific control reg1 (0x14) for-
+	 * Enable Phy power up
+	 * Energy Detect on (sense&Xmit NLP Periodically
+	 * reset other settings default
+	 */
+	WR_PHY(name, MV88E61XX_GLB2REG_DEVADR, MV88E61XX_PHY_DATA, 0x3360);
+	WR_PHY(name, MV88E61XX_GLB2REG_DEVADR,
+	       MV88E61XX_PHY_CMD, (0x9410 | (prt << 5)));
+
+	if (mv88e61xx_busychk(name))
+		return -1;
+
+	/* Write PHY ctrl reg (0x0) to apply
+	 * Phy reset (set bit 15 low)
+	 * reset other default values
+	 */
+	WR_PHY(name, MV88E61XX_GLB2REG_DEVADR, MV88E61XX_PHY_DATA, 0x1140);
+	WR_PHY(name, MV88E61XX_GLB2REG_DEVADR,
+	       MV88E61XX_PHY_CMD, (0x9400 | (prt << 5)));
+
+	if (mv88e61xx_busychk(name))
+		return -1;
+
+	return 0;
+}
+
+/*
+ * Default Setup for LED[0]_Control (ref: Table 46 Datasheet-3)
+ * is set to "On-1000Mb/s Link, Off Else"
+ * This function sets it to "On-Link, Blink-Activity, Off-NoLink"
+ *
+ * This is optional settings may be needed on some boards
+ * to setup PHY LEDs default configuration to detect 10/100/1000Mb/s
+ * Link status
+ */
+static int mv88361xx_led_init(struct mv88e61xx_config *swconfig, u32 prt)
+{
+	char *name = swconfig->name;
+	u16 reg;
+
+	if (swconfig->led_init != MV88E61XX_LED_INIT_EN)
+		return 0;
+
+	/* set page address to 3 */
+	reg = 3;
+	WR_PHY(name, MV88E61XX_GLB2REG_DEVADR, MV88E61XX_PHY_DATA, reg);
+	WR_PHY(name, MV88E61XX_GLB2REG_DEVADR,
+	       MV88E61XX_PHY_CMD, (1 << MV88E61XX_BUSY_OFST |
+				   1 << MV88E61XX_MODE_OFST |
+				   1 << MV88E61XX_OP_OFST |
+				   prt << MV88E61XX_ADDR_OFST | 22));
+
+	if (mv88e61xx_busychk(name))
+		return -1;
+
+	/* set LED Func Ctrl reg */
+	reg = 1;	/* LED[0] On-Link, Blink-Activity, Off-NoLink */
+	WR_PHY(name, MV88E61XX_GLB2REG_DEVADR, MV88E61XX_PHY_DATA, reg);
+	WR_PHY(name, MV88E61XX_GLB2REG_DEVADR,
+	       MV88E61XX_PHY_CMD, (1 << MV88E61XX_BUSY_OFST |
+				   1 << MV88E61XX_MODE_OFST |
+				   1 << MV88E61XX_OP_OFST |
+				   prt << MV88E61XX_ADDR_OFST | 16));
+
+	if (mv88e61xx_busychk(name))
+		return -1;
+
+	/* set page address to 0 */
+	reg = 0;
+	WR_PHY(name, MV88E61XX_GLB2REG_DEVADR, MV88E61XX_PHY_DATA, reg);
+	WR_PHY(name, MV88E61XX_GLB2REG_DEVADR,
+	       MV88E61XX_PHY_CMD, (1 << MV88E61XX_BUSY_OFST |
+				   1 << MV88E61XX_MODE_OFST |
+				   1 << MV88E61XX_OP_OFST |
+				   prt << MV88E61XX_ADDR_OFST | 22));
+
+	if (mv88e61xx_busychk(name))
+		return -1;
+
+	return 0;
+}
+
+/*
+ * Reverse Transmit polarity for Media Dependent Interface
+ * Pins (MDIP) bits in Copper Specific Control Register 3
+ * (Page 0, Reg 20 for each phy (except cpu port)
+ * Reference: Section 1.1 Switch datasheet-3
+ *
+ * This is optional settings may be needed on some boards
+ * for PHY<->magnetics h/w tuning
+ */
+static int mv88361xx_reverse_mdipn(struct mv88e61xx_config *swconfig, u32 prt)
+{
+	char *name = swconfig->name;
+	u16 reg;
+
+	if (swconfig->mdip != MV88E61XX_MDIP_REVERSE)
+		return 0;
+
+	reg = 0x0f;		/*Reverse MDIP/N[3:0] bits */
+	WR_PHY(name, MV88E61XX_GLB2REG_DEVADR, MV88E61XX_PHY_DATA, reg);
+	WR_PHY(name, MV88E61XX_GLB2REG_DEVADR,
+	       MV88E61XX_PHY_CMD, (1 << MV88E61XX_BUSY_OFST |
+				   1 << MV88E61XX_MODE_OFST |
+				   1 << MV88E61XX_OP_OFST |
+				   prt << MV88E61XX_ADDR_OFST | 20));
+
+	if (mv88e61xx_busychk(name))
+		return -1;
+
+	return 0;
+}
+
+/*
+ * Marvell 88E61XX Switch initialization
+ */
+int mv88e61xx_switch_initialize(struct mv88e61xx_config *swconfig)
+{
+	u32 prt;
+	u16 reg;
+	char *idstr;
+	char *name = swconfig->name;
+
+	if (miiphy_set_current_dev(name)) {
+		printf("%s failed\n", __FUNCTION__);
+		return -1;
+	}
+
+	if (!(swconfig->cpuport & ((1 << 4) | (1 << 5)))) {
+		swconfig->cpuport = (1 << 5);
+		printf("Invalid cpu port config, using default port5\n");
+	}
+
+	RD_PHY(name, MV88E61XX_PRT_OFST, PHY_PHYIDR2, &reg);
+	reg &= 0xfff0;
+	if (reg == 0x1610)
+		idstr = "88E6161";
+	if (reg == 0x1650)
+		idstr = "88E6165";
+	if (reg == 0x1210) {
+		idstr = "88E6123";
+		/* ports 2,3,4 not available */
+		swconfig->ports_enabled &= 0x023;
+	}
+
+	/* Port based VLANs configuration */
+	if ((swconfig->vlancfg == MV88E61XX_VLANCFG_DEFAULT)
+	    || (swconfig->vlancfg == MV88E61XX_VLANCFG_ROUTER))
+		mv88e61xx_port_vlan_config(swconfig, MV88E61XX_MAX_PORTS_NUM,
+					   MV88E61XX_PRT_OFST);
+	else {
+		printf("Unsupported mode %s failed\n", __FUNCTION__);
+		return -1;
+	}
+
+	if (swconfig->rgmii_delay == MV88E61XX_RGMII_DELAY_EN) {
+		/*
+		 * Enable RGMII delay on Tx and Rx for CPU port
+		 * Ref: sec 9.5 of chip datasheet-02
+		 */
+		WR_PHY(name, MV88E61XX_PRT_OFST + 5,
+		       MV88E61XX_RGMII_TIMECTRL_REG, 0x18);
+		WR_PHY(name, MV88E61XX_PRT_OFST + 4,
+		       MV88E61XX_RGMII_TIMECTRL_REG, 0xc1e7);
+	}
+
+	for (prt = 0; prt < MV88E61XX_MAX_PORTS_NUM; prt++) {
+		if (!((1 << prt) & swconfig->cpuport)) {
+
+			if (mv88361xx_led_init(swconfig, prt))
+				return -1;
+			if (mv88361xx_reverse_mdipn(swconfig, prt))
+				return -1;
+			if (mv88361xx_powerup(swconfig, prt))
+				return -1;
+		}
+
+		/*Program port state */
+		RD_PHY(name, MV88E61XX_PRT_OFST + prt,
+		       MV88E61XX_PRT_CTRL_REG, &reg);
+		WR_PHY(name, MV88E61XX_PRT_OFST + prt,
+		       MV88E61XX_PRT_CTRL_REG,
+		       reg | (swconfig->portstate & 0x03));
+	}
+
+	printf("%s Initialized on %s\n", idstr, name);
+	return 0;
+}