--- /dev/null
+/*
+ * drivers/net/phy/gw16083.c
+ *
+ * Driver for GW16083 Ventana Ethernet Expansion Mezzanine
+ *
+ * Author: Tim Harvey
+ *
+ * Copyright (c) 2014 Tim Harvey <tharvey@gateworks.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.
+ *
+ */
+
+/*
+ * The GW16083 interfaces with a Ventana baseboard via the PCIe bus, an i2c
+ * bus (i2c2), and a couple of GPIO's. On the PCIe bus is an i210 GigE with
+ * its MAC connected to Port4 of a Marvell MV88E6176 7-port GigE switch via
+ * MDIO and RGMII. Ports 0-3 are standard copper RJ45 but Ports 5 and 6
+ * connect to Marvell MV88E1111 dual-mode Copper/Fiber PHY's over SGMII and
+ * MDIO. The PHY's have both an RG45 for copper and an SFP module.
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/phy.h>
+#include <linux/marvell_phy.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+#include <linux/io.h>
+#include <asm/irq.h>
+#include <net/dsa.h>
+#include <linux/uaccess.h>
+
+#include "gw16083.h"
+
+#undef FAIL_ON_CHECKSUM_ERR /* fail to configure SFP if checksum bad */
+#define PORT_POWER_CONTROL /* ports can be enabled/disabled via sysfs */
+#define PORT_MODE_CONTROL /* ports 5/6 can have SFP/RJ45 mode forced */
+#define RGMII_DELAY_ON_PHY /* implement Port5/6 tx/rx delay on PHY vs sw */
+
+MODULE_DESCRIPTION("GW16083 driver");
+MODULE_AUTHOR("Tim Harvey");
+MODULE_LICENSE("GPL");
+
+struct mv88e1111_port_state {
+ int port;
+ bool present;
+ bool serdes;
+ bool sfp_signal;
+ bool sfp_present;
+ bool sfp_compat;
+ bool sfp_enabled;
+ char sfp_id[64];
+};
+
+struct mv88e1111_priv {
+ struct phy_device *phydev;
+ struct i2c_client *client;
+ struct mv88e1111_port_state port5;
+ struct mv88e1111_port_state port6;
+ struct kobject *sysfs_kobj;
+ struct delayed_work work;
+ struct workqueue_struct *workq;
+};
+
+enum {
+ mode_copper = 0,
+ mode_serdes = 1,
+};
+
+#if IS_ENABLED(CONFIG_NET_DSA_MV88E6352)
+static struct dsa_chip_data switch_chip_data = {
+ .port_names = {
+ "lan4",
+ "lan3",
+ "lan2",
+ "lan1",
+ "cpu",
+ "lan5",
+ "lan6",
+ },
+};
+
+static struct dsa_platform_data switch_plat_data = {
+ .nr_chips = 1,
+ .chip = &switch_chip_data,
+};
+
+static struct platform_device switch_device = {
+ .name = "dsa",
+ .id = 0,
+ .num_resources = 0,
+ .dev.platform_data = &switch_plat_data,
+};
+#endif
+
+static struct i2c_client *gw16083_client = NULL;
+
+static int gw16083_read_port_sfp(struct i2c_client *client,
+ struct mv88e1111_port_state *state);
+
+/* read switch port register from port0-6 */
+u16 read_switch_port(struct phy_device *pdev, int port, u8 regaddr)
+{
+ return pdev->bus->read(pdev->bus, MV_BASE + port, regaddr);
+}
+
+/* write switch port register to port0-6 */
+int write_switch_port(struct phy_device *pdev, int port, u8 regaddr, u16 val)
+{
+ return pdev->bus->write(pdev->bus, MV_BASE + port, regaddr, val);
+}
+
+/*
+ * read_switch_port_phy - write a register for a specific port on 88E6176
+ * The 88E6176 PHY registers must be accessed thorugh the Global2 address
+ * using the SMI_PHY_COMMAND_REG and SMI_PHY_DATA_REG.
+ */
+int read_switch_port_phy(struct phy_device *pdev, int port, u8 regaddr)
+{
+ struct mv88e1111_priv *priv = dev_get_drvdata(&pdev->dev);
+ u16 reg;
+ int i;
+
+ dev_dbg(&priv->client->dev, "read_phy: port%d reg=0x%02x\n", port,
+ regaddr);
+ reg = SMIBUSY | SMIMODE22 | SMIOP_READ;
+ reg |= port << DEVADDR;
+ reg |= regaddr << REGADDR;
+ pdev->bus->write(pdev->bus, MV_GLOBAL2, MV_SMI_PHY_COMMAND, reg);
+ for (i = 0; i < 10; i++) {
+ reg = pdev->bus->read(pdev->bus, MV_GLOBAL2,
+ MV_SMI_PHY_COMMAND);
+ if (!(reg & (1<<15)))
+ break;
+ mdelay(1);
+ }
+ /* timeout */
+ if (i == 10)
+ return 0xffff;
+ reg = pdev->bus->read(pdev->bus, MV_GLOBAL2, MV_SMI_PHY_DATA);
+ return reg;
+}
+
+/*
+ * write_switch_port_phy - write a register for a specific port on 88E6176
+ * The 88E6176 PHY registers must be accessed thorugh the Global2 address
+ * using the SMI_PHY_COMMAND_REG and SMI_PHY_DATA_REG.
+ */
+int write_switch_port_phy(struct phy_device *pdev, int port, u8 addr, u16 reg)
+{
+ struct mv88e1111_priv *priv = dev_get_drvdata(&pdev->dev);
+ int i;
+
+ dev_dbg(&priv->client->dev, "write_phy: port%d reg=0x%02x val=0x%04x\n",
+ port, addr, reg);
+ pdev->bus->write(pdev->bus, MV_GLOBAL2, MV_SMI_PHY_DATA, reg);
+ reg = SMIBUSY | SMIMODE22 | SMIOP_WRITE;
+ reg |= port << DEVADDR;
+ reg |= addr << REGADDR;
+ pdev->bus->write(pdev->bus, MV_GLOBAL2, MV_SMI_PHY_COMMAND, reg);
+ for (i = 0; i < 10; i++) {
+ reg = pdev->bus->read(pdev->bus, MV_GLOBAL2,
+ MV_SMI_PHY_COMMAND);
+ if (!(reg & (1<<15)))
+ break;
+ mdelay(1);
+ }
+ /* timeout */
+ if (i == 10)
+ return -ETIMEDOUT;
+
+ return 0;
+}
+
+/* read a scratch register from switch */
+inline u8 read_switch_scratch(struct phy_device *pdev, u8 reg)
+{
+ pdev->bus->write(pdev->bus, MV_GLOBAL2, MV_SCRATCH_MISC, (reg << 8));
+ return pdev->bus->read(pdev->bus, MV_GLOBAL2, MV_SCRATCH_MISC) & 0xff;
+}
+
+/* write a scratch register to switch */
+inline void write_switch_scratch(struct phy_device *pdev, u8 reg, u8 val)
+{
+ pdev->bus->write(pdev->bus, MV_GLOBAL2, MV_SCRATCH_MISC,
+ (1 << 15) | (reg << 8) | val);
+}
+
+/* enable or disable an SFP's TXEN signal */
+static int enable_sfp_txen(struct phy_device *pdev, int port, bool enable)
+{
+ struct mv88e1111_priv *priv = dev_get_drvdata(&pdev->dev);
+ u8 gpio;
+ int bit;
+
+ if (port != 5 && port != 6)
+ return -EINVAL;
+
+ /* GPIO[2:1] output low to enable TXEN */
+ bit = (port == 5) ? 1 : 2;
+ gpio = read_switch_scratch(pdev, MV_GPIO_DATA);
+ if (enable)
+ gpio |= (1 << bit);
+ else
+ gpio &= (1 << bit);
+ write_switch_scratch(pdev, MV_GPIO_DATA, gpio);
+ dev_info(&priv->client->dev, "Port%d: SFP TX %s\n", port, enable ?
+ "enabled" : "disabled");
+ return 0;
+}
+
+/* configure mv88e1111 port for copper or serdes
+ * For Copper we set auto link/duplex/speed detection
+ * For SerDes/Fiber we force 1000mbps link up and auto-neg duplex
+ */
+static int config_mv88e1111_port_sfp(struct phy_device *pdev, int port,
+ bool sfp)
+{
+ struct mv88e1111_priv *priv = dev_get_drvdata(&pdev->dev);
+ u16 reg;
+
+ if (port != 5 && port != 6)
+ return -EINVAL;
+
+ dev_dbg(&priv->client->dev, "%s: Port%d %s\n", __func__, port,
+ sfp ? "SFP" : "copper");
+ if (sfp) {
+ enable_sfp_txen(pdev, port, 1);
+
+ /* configure MV88E6176 Physical Control Port Register */
+ dev_info(&priv->client->dev,
+ "Port%d: SFP: force 1000mbps link up "
+ "(auto-negotiate duplex)\n",
+ port);
+ reg = read_switch_port(pdev, port, MV_PORT_PHYS_CONTROL);
+ reg &= ~0x3f; /* clear 5-0 */
+ reg |= (1 << 4) | (1 << 5); /* force link up */
+ reg |= 2; /* force 1000mbps */
+ write_switch_port(pdev, port, MV_PORT_PHYS_CONTROL, reg);
+ reg = read_switch_port(pdev, port, MV_PORT_PHYS_CONTROL);
+ }
+
+ /* copper */
+ else {
+ enable_sfp_txen(pdev, port, 0);
+
+ /* configure MV88E6176 Physical Control Port Register */
+ dev_info(&priv->client->dev,
+ "Port%d: Copper: set auto-neg link/duplex/speed\n",
+ port);
+ reg = read_switch_port(pdev, port, MV_PORT_PHYS_CONTROL);
+ reg &= ~0x3f; /* clear 5-0 */
+ reg |= 3; /* speed not forced */
+ write_switch_port(pdev, port, MV_PORT_PHYS_CONTROL, reg);
+ reg = read_switch_port(pdev, port, MV_PORT_PHYS_CONTROL);
+ }
+ dev_dbg(&priv->client->dev, "%s: Port%d %s PORT_PHYS_CONTROL=0x%04x\n",
+ __func__, port, sfp ? "SFP" : "copper",
+ read_switch_port(pdev, port, MV_PORT_PHYS_CONTROL));
+
+ return 0;
+}
+
+#if !IS_ENABLED(CONFIG_NET_DSA_MV88E6352) && defined(PORT_POWER_CONTROL)
+static int enable_switch_port(struct phy_device *pdev, int port, bool enable)
+{
+ struct mv88e1111_priv *priv = dev_get_drvdata(&pdev->dev);
+ u16 reg;
+
+ /* power up port */
+ dev_info(&priv->client->dev, "Port%d: %s\n", port,
+ enable ? "normal operation" : "power down");
+ reg = read_switch_port_phy(pdev, port, MV_PHY_CONTROL);
+ if (enable)
+ reg &= ~(1 << 11); /* Normal Operation */
+ else
+ reg |= (1 << 11); /* power down */
+ write_switch_port_phy(pdev, port, MV_PHY_CONTROL, reg);
+
+ reg = read_switch_port_phy(pdev, port, MV_PHY_CONTROL1);
+ if (enable)
+ reg &= ~(1 << 2); /* Normal Operation */
+ else
+ reg |= (1 << 2); /* power down */
+ write_switch_port_phy(pdev, port, MV_PHY_CONTROL1, reg);
+
+ return 0;
+}
+#endif
+
+/*
+ * Sysfs API
+ */
+
+struct mv88e1111_port_state *get_port_state(struct mv88e1111_priv *priv,
+ int port)
+{
+ if (port == 5)
+ return &priv->port5;
+ if (port == 6)
+ return &priv->port6;
+ return NULL;
+}
+
+/*
+ * get MV88E6176 port number for a specific GW16083 port name
+ * The GW16083 ports as shown on the silkscreen are not mapped according to
+ * the MV88E6176 ports numbers.
+ */
+static int gw16083_get_port(const char* name)
+{
+ int i;
+ int map[] = { 3, 2, 1, 0, 5, 6 };
+
+ if (strncasecmp(name, "LAN", 3) != 0)
+ return -1;
+ i = name[3] - '0';
+ if (i < 1 || i > 6)
+ return -1;
+ return map[i-1];
+}
+
+#if !IS_ENABLED(CONFIG_NET_DSA_MV88E6352)
+static ssize_t port_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct mv88e1111_priv *priv = dev_get_drvdata(dev);
+ int port = -1;
+ u16 reg;
+
+ if (sscanf(attr->attr.name, "port%d", &port) != 1)
+ return 0;
+ if (port < 0 || port > 6)
+ return 0;
+ reg = read_switch_port_phy(priv->phydev, port, MV_PHY_CONTROL);
+ return sprintf(buf, "%s\n", (reg & (1 << 11)) ? "disabled" : "enabled");
+}
+
+#if defined(PORT_POWER_CONTROL)
+static ssize_t port_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mv88e1111_priv *priv = dev_get_drvdata(dev);
+ int port = -1;
+ int val;
+
+ port = gw16083_get_port(attr->attr.name);
+ if (port < 0)
+ return 0;
+ if (sscanf(buf, "%d", &val) != 1)
+ return 0;
+ enable_switch_port(priv->phydev, port, val ? 1 : 0);
+ return count;
+}
+
+static DEVICE_ATTR(lan1, S_IWUSR | S_IRUGO, port_show, port_store);
+static DEVICE_ATTR(lan2, S_IWUSR | S_IRUGO, port_show, port_store);
+static DEVICE_ATTR(lan3, S_IWUSR | S_IRUGO, port_show, port_store);
+static DEVICE_ATTR(lan4, S_IWUSR | S_IRUGO, port_show, port_store);
+static DEVICE_ATTR(lan5, S_IWUSR | S_IRUGO, port_show, port_store);
+static DEVICE_ATTR(lan6, S_IWUSR | S_IRUGO, port_show, port_store);
+#else
+static DEVICE_ATTR(lan1, S_IRUGO, port_show, NULL);
+static DEVICE_ATTR(lan2, S_IRUGO, port_show, NULL);
+static DEVICE_ATTR(lan3, S_IRUGO, port_show, NULL);
+static DEVICE_ATTR(lan4, S_IRUGO, port_show, NULL);
+static DEVICE_ATTR(lan5, S_IRUGO, port_show, NULL);
+static DEVICE_ATTR(lan6, S_IRUGO, port_show, NULL);
+#endif
+#endif /* #if IS_ENABLED(CONFIG_NET_DSA_MV88E6352) */
+
+static ssize_t portmode_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct mv88e1111_priv *priv = dev_get_drvdata(dev);
+ struct mv88e1111_port_state *state;
+
+ state = get_port_state(priv, gw16083_get_port(attr->attr.name));
+ if (!state)
+ return 0;
+
+ return sprintf(buf, "%s\n", state->serdes ? "SFP" : "RJ45");
+}
+#ifdef PORT_MODE_CONTROL
+static ssize_t portmode_store(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct mv88e1111_priv *priv = dev_get_drvdata(dev);
+ struct mv88e1111_port_state *state;
+ u16 reg;
+ int port;
+
+ port = gw16083_get_port(attr->attr.name);
+ state = get_port_state(priv, port);
+ if (!state)
+ return 0;
+
+ reg = read_switch_port_phy(priv->phydev, port, MII_M1111_PHY_EXT_SR);
+ if (strcasecmp(buf, "auto") == 0) {
+ reg &= ~(1<<15); /* enable auto-selection */
+ dev_info(&priv->client->dev, "Port%d: enable auto-selection\n",
+ port);
+ } else if (strcasecmp(buf, "RJ45") == 0) {
+ reg |= (1<<15); /* disable auto-selection */
+ reg |= 0xb; /* RGMII to Copper */
+ config_mv88e1111_port_sfp(priv->phydev, port, 0);
+ dev_info(&priv->client->dev, "Port%d: select RJ45\n", port);
+ } else if (strcasecmp(buf, "SFP") == 0) {
+ reg |= (1<<15); /* disable auto-selection */
+ reg |= 0x3; /* RGMII to Fiber */
+ config_mv88e1111_port_sfp(priv->phydev, port, 1);
+ dev_info(&priv->client->dev, "Port%d: select SFP\n", port);
+ }
+ write_switch_port_phy(priv->phydev, port, MII_M1111_PHY_EXT_SR, reg);
+
+ return count;
+}
+
+static DEVICE_ATTR(lan5_mode, S_IWUSR | S_IRUGO, portmode_show, portmode_store);
+static DEVICE_ATTR(lan6_mode, S_IWUSR | S_IRUGO, portmode_show, portmode_store);
+#else
+static DEVICE_ATTR(lan5_mode, S_IRUGO, portmode_show, NULL);
+static DEVICE_ATTR(lan6_mode, S_IRUGO, portmode_show, NULL);
+#endif
+
+static ssize_t portsfp_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct mv88e1111_priv *priv = dev_get_drvdata(dev);
+ struct mv88e1111_port_state *state;
+
+ state = get_port_state(priv, gw16083_get_port(attr->attr.name));
+ if (!state)
+ return 0;
+
+ if (!state->sfp_present)
+ return 0;
+
+ return sprintf(buf, "%s\n", state->sfp_id);
+}
+
+static DEVICE_ATTR(lan5_sfp, S_IRUGO, portsfp_show, NULL);
+static DEVICE_ATTR(lan6_sfp, S_IRUGO, portsfp_show, NULL);
+
+/*
+ * PHY driver
+ */
+
+/* check MV88E1111 PHY status and MV88E6176 GPIO */
+static void
+mv88e6176_work(struct work_struct *work)
+{
+ struct mv88e1111_priv *priv =
+ container_of(work, struct mv88e1111_priv, work.work);
+ struct phy_device *pdev = priv->phydev;
+ struct device *dev = &priv->client->dev;
+ struct mv88e1111_port_state *state;
+ bool serdes, sfp_present, sfp_signal;
+ int port;
+ u16 gpio;
+
+ mutex_lock(&pdev->lock);
+ gpio = read_switch_scratch(pdev, MV_GPIO_DATA);
+ for (port = 5; port < 7; port++) {
+ serdes = (read_switch_port_phy(pdev, port, MII_M1111_PHY_EXT_SR)
+ & (1<<13)) ? 1 : 0;
+ dev_dbg(dev, "%s: Port%d GPIO:0x%02x SerDes:%d\n",
+ __func__, port, gpio, serdes);
+ switch(port) {
+ case 5:
+ state = &priv->port5;
+ sfp_present = !((gpio >> 5) & 1);
+ sfp_signal = !((gpio >> 6) & 1);
+ break;
+ case 6:
+ state = &priv->port6;
+ sfp_present = !((gpio >> 3) & 1);
+ sfp_signal = !((gpio >> 4) & 1);
+ break;
+ }
+
+ /*
+ * on sfp_detect read/verify SFP MSA and set sfp_compat
+ * on sfp_signal issue link down?
+ * on serdes auto-select
+ */
+ if (state->sfp_present != sfp_present) {
+ state->sfp_present = sfp_present;
+ dev_info(dev, "Port%d: SFP %s\n",
+ port, sfp_present ? "inserted" : "removed");
+ if (state->sfp_present) {
+ if (gw16083_read_port_sfp(priv->client, state))
+ state->sfp_compat = false;
+ else
+ state->sfp_compat = true;
+ /* trigger a re-select/enable below */
+ state->serdes = !serdes;
+ pdev->state = PHY_RUNNING;
+ } else {
+ state->sfp_compat = false;
+ state->sfp_enabled = false;
+ pdev->state = PHY_NOLINK;
+ }
+ }
+ if (state->sfp_signal != sfp_signal) {
+ state->sfp_signal = sfp_signal;
+ dev_info(dev, "Port%d: SFP signal %s\n",
+ port, sfp_signal ? "detected" : "lost");
+ }
+ if (state->serdes != serdes) {
+ state->serdes = serdes;
+ dev_info(dev, "Port%d: %s auto-selected\n",
+ port, serdes ? "SERDES" : "copper");
+
+ /*
+ * if auto-selection has switched to copper
+ * disable serdes
+ */
+ if (!serdes) {
+ config_mv88e1111_port_sfp(pdev, port, 0);
+ state->sfp_enabled = false;
+ }
+ }
+
+ /* if compatible SFP module and not yet enabled then enable */
+ if (state->sfp_compat && state->sfp_signal &&
+ !state->sfp_enabled)
+ {
+ if (!config_mv88e1111_port_sfp(pdev, port, 1))
+ state->sfp_enabled = true;
+ }
+ }
+ mutex_unlock(&pdev->lock);
+
+ queue_delayed_work(priv->workq, &priv->work, HZ);
+}
+
+static int
+mv88e6176_read_status(struct phy_device *pdev)
+{
+ return 0;
+}
+
+static int
+mv88e6176_config_aneg(struct phy_device *pdev)
+{
+ return 0;
+}
+
+static int
+mv88e6176_config_init(struct phy_device *pdev)
+{
+ pdev->state = PHY_RUNNING;
+
+ return 0;
+}
+
+static void
+mv88e6176_remove(struct phy_device *pdev)
+{
+ struct mv88e1111_priv *priv = dev_get_drvdata(&pdev->dev);
+
+ dev_dbg(&priv->client->dev, "%s", __func__);
+
+ destroy_workqueue(priv->workq);
+#if !IS_ENABLED(CONFIG_NET_DSA_MV88E6352)
+ device_remove_file(&pdev->dev, &dev_attr_lan1);
+ device_remove_file(&pdev->dev, &dev_attr_lan2);
+ device_remove_file(&pdev->dev, &dev_attr_lan3);
+ device_remove_file(&pdev->dev, &dev_attr_lan4);
+ device_remove_file(&pdev->dev, &dev_attr_lan5);
+ device_remove_file(&pdev->dev, &dev_attr_lan6);
+#endif
+ device_remove_file(&pdev->dev, &dev_attr_lan5_sfp);
+ device_remove_file(&pdev->dev, &dev_attr_lan6_sfp);
+ device_remove_file(&pdev->dev, &dev_attr_lan5_mode);
+ device_remove_file(&pdev->dev, &dev_attr_lan6_mode);
+ sysfs_remove_link(kernel_kobj, "gw16083");
+}
+
+/*
+ * mv88e6176_probe - called any time an MV88E6176 is found on an mdio bus
+ * Determine if this MV88E6176 is indeed on a GW16083 and if so configure
+ * the port5/port6 phy and register a background procedure for monitoring
+ * their states to support SFP vs Copper switching.
+ *
+ * Verify this is a GW16083 by ensuring:
+ * - the phy address matches that of a GW16083
+ * - the mdio bus is from an i210 device (igb driver)
+ * - there are MV881111 PHY's hanging off of Port5 and Port6
+ */
+static int
+mv88e6176_probe(struct phy_device *pdev)
+{
+ int port;
+ int ret = 0;
+ u32 id, reg;
+ struct mv88e1111_priv *priv;
+ struct device *dev;
+#if IS_ENABLED(CONFIG_NET_DSA_MV88E6352)
+ struct net_device *netdev = NULL;
+#endif
+
+ dev_dbg(&pdev->dev, "%s: addr=0x%02x bus=%s:%s gw16083_client=%p\n",
+ __func__, pdev->addr, pdev->bus->name, pdev->bus->id,
+ gw16083_client);
+
+ /* In single-chip addressing mode the MV88E6176 shows up on 0x10-0x16 */
+ if (pdev->addr != MV_BASE)
+ return 0;
+
+ /* i2c driver needs to be loaded first */
+ if (!gw16083_client)
+ return 0;
+ dev = &gw16083_client->dev;
+
+ /* gw16083 has MV88E1676 hanging off of i210 mdio bus */
+ if (strcmp(pdev->bus->name, "igb_enet_mii_bus") != 0)
+ return 0;
+
+ /* verify Port5/Port6 have an MV88E1111 PHY hanging off them */
+ for (port = 5; port < 7; port++) {
+ id = read_switch_port_phy(pdev, port,
+ MII_M1111_PHY_IDENT0) << 16;
+ id |= read_switch_port_phy(pdev, port, MII_M1111_PHY_IDENT1);
+ if ((id & MII_M1111_PHY_ID_MASK) != MII_M1111_PHY_ID) {
+ dev_err(dev, "Port%d: No MV88E1111 PHY detected", port);
+ return 0;
+ }
+ }
+
+#if IS_ENABLED(CONFIG_NET_DSA_MV88E6352)
+ /*
+ * Find the netdev this bus is hanging off of and register with DSA:
+ * The netdev must be an Intel I210 (igb) with Gateworks MAC addr
+ */
+ read_lock(&dev_base_lock);
+ for_each_netdev(&init_net, netdev) {
+ if (netdev->dev.parent &&
+ !strcmp(netdev->dev.parent->driver->name, "igb") &&
+ (netdev->perm_addr[0] == 0x00) &&
+ (netdev->perm_addr[1] == 0xd0) &&
+ (netdev->perm_addr[2] == 0x12))
+ {
+ switch_plat_data.netdev = &netdev->dev;
+ switch_plat_data.chip[0].host_dev = &pdev->bus->dev;
+ break;
+ }
+ }
+ read_unlock(&dev_base_lock);
+
+ if (switch_plat_data.netdev) {
+ platform_device_register(&switch_device);
+ dev_info(dev, "registered GW16083 DSA switch\n");
+ } else {
+ dev_err(dev, "failed to find netdev for DSA switch\n");
+ }
+#endif
+
+ /*
+ * port5/6 config: MV88E1111 PHY
+ * Register 20: PHY Control Register
+ * R20_7: add delay to RX_CLK for RXD
+ * R20_1: add delay to TX_CLK for TXD
+ * Register 24: LED Control Register
+ * 0x4111:
+ * Pulse stretch 170 to 340 ms
+ * Register 0: Control Register
+ * R0_15: phy reset
+ */
+ dev_info(dev, "Configuring MV88E6176 7-port switch");
+ for (port = 5; port < 7; port++) {
+#ifdef RGMII_DELAY_ON_PHY
+ /* phy rx/tx delay */
+ reg = read_switch_port_phy(pdev, port, MII_M1111_PHY_EXT_CR);
+ reg |= (1<<1) | (1<<7);
+ write_switch_port_phy(pdev, port, MII_M1111_PHY_EXT_CR, reg);
+#else
+ write_switch_port(pdev, port, MV_PORT_PHYS_CONTROL, 0xC003);
+#endif
+
+ /* led config */
+ write_switch_port_phy(pdev, port, MII_M1111_PHY_LED_CONTROL,
+ MII_M1111_PHY_LED_PULSE_STR);
+ /* reset phy */
+ reg = read_switch_port_phy(pdev, port, MII_M1111_PHY_CONTROL);
+ reg |= MII_M1111_PHY_CONTROL_RESET;
+ write_switch_port_phy(pdev, port, MII_M1111_PHY_CONTROL, reg);
+ dev_info(dev, "Port%d: MV88E111 PHY configured\n", port);
+ }
+
+ /*
+ * GPIO Configuration:
+ * GPIO1: FIB5_TXEN# (output)
+ * GPIO2: FIB6_TXEN# (output)
+ * GPIO3: FIB6_PRES# (input)
+ * GPIO4: FIB6_LOS (input)
+ * GPIO5: FIB5_PRES# (input)
+ * GPIO6: FIB5_LOS (input)
+ */
+ write_switch_scratch(pdev, MV_GPIO_DATA, 0x06); /* GPIO[2:1] out hi */
+ write_switch_scratch(pdev, MV_GPIO_DIR, 0x78); /* GPIO[6:3] inp */
+
+ pdev->irq = PHY_POLL;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ memset(priv, 0, sizeof(*priv));
+ priv->phydev = pdev;
+ priv->client = gw16083_client;
+ priv->port5.port = 5;
+ priv->port6.port = 6;
+ dev_set_drvdata(&pdev->dev, priv);
+
+ /* register sysfs API */
+#if !IS_ENABLED(CONFIG_NET_DSA_MV88E6352)
+ ret |= device_create_file(&pdev->dev, &dev_attr_lan1);
+ ret |= device_create_file(&pdev->dev, &dev_attr_lan2);
+ ret |= device_create_file(&pdev->dev, &dev_attr_lan3);
+ ret |= device_create_file(&pdev->dev, &dev_attr_lan4);
+ ret |= device_create_file(&pdev->dev, &dev_attr_lan5);
+ ret |= device_create_file(&pdev->dev, &dev_attr_lan6);
+#endif
+ ret |= device_create_file(&pdev->dev, &dev_attr_lan5_sfp);
+ ret |= device_create_file(&pdev->dev, &dev_attr_lan6_sfp);
+ ret |= device_create_file(&pdev->dev, &dev_attr_lan5_mode);
+ ret |= device_create_file(&pdev->dev, &dev_attr_lan6_mode);
+
+ if (unlikely(ret))
+ dev_err(&pdev->dev, "Failed creating attrs\n");
+
+ /* Add a nice symlink to the real device */
+ ret = sysfs_create_link(kernel_kobj, &pdev->dev.kobj, "gw16083");
+
+ INIT_DELAYED_WORK(&priv->work, mv88e6176_work);
+ priv->workq = create_singlethread_workqueue("gw16083");
+ if (!priv->workq)
+ return -ENODEV;
+ queue_delayed_work(priv->workq, &priv->work, 0);
+
+ dev_dbg(dev, "initial state: GPIO=0x%02x "
+ "Port5_serdes=%d Port6_serdes=%d\n",
+ read_switch_scratch(pdev, MV_GPIO_DATA),
+ (read_switch_port_phy(pdev, 5, MII_M1111_PHY_EXT_SR)
+ & (1<<13) ? 1:0),
+ (read_switch_port_phy(pdev, 6, MII_M1111_PHY_EXT_SR)
+ & (1<<13) ? 1:0));
+
+ return ret;
+}
+
+static struct phy_driver mv88e6176_phy_driver = {
+ .name = "gw16083",
+ .phy_id = MV_IDENT_VALUE,
+ .phy_id_mask = MV_IDENT_MASK,
+ .features = PHY_BASIC_FEATURES,
+ .probe = &mv88e6176_probe,
+ .remove = &mv88e6176_remove,
+ .config_init = &mv88e6176_config_init,
+ .config_aneg = &mv88e6176_config_aneg,
+ .read_status = &mv88e6176_read_status,
+ .driver = { .owner = THIS_MODULE },
+};
+
+/*
+ * I2C driver
+ */
+
+/* See SFF-8472 */
+struct sfp_msa {
+ /* Basic ID fields */
+ u8 identifier;
+ u8 ext_identifier;
+ u8 connector;
+ u8 transceiver[8];
+ u8 encoding;
+ u8 br_nominal;
+ u8 rate_identifier;
+ u8 length_smf_km;
+ u8 length_smf;
+ u8 length_om2;
+ u8 length_om1;
+ u8 length_om4;
+ u8 length_om3;
+ u8 vendor_name[16];
+ u8 transceiver2;
+ u8 vendor_oui[3];
+ u8 vendor_pn[16];
+ u8 vendor_rev[4];
+ u8 wavelength[2];
+ u8 resv1;
+ u8 cc_base;
+
+ /* extended id fields */
+ u8 options[2];
+ u8 br_max;
+ u8 br_min;
+ u8 vendor_sn[16];
+ u8 date_code[8];
+ u8 diags_type;
+ u8 enhanced_options;
+ u8 sff8472_compliance;
+ u8 cc_ext;
+
+ /* Vendor specific ID fields */
+ u8 vendor_data[32];
+ u8 sff8079[128];
+};
+
+enum identifier {
+ UNKNOWN,
+ GBIC,
+ SFF,
+ SFP,
+ XBI,
+ XENPACK,
+ XFP,
+ XFF,
+ XFP_E,
+ XPAK,
+ X2,
+ DWDM_SFP,
+ QSFP,
+ MAX_ID,
+};
+
+const char* id_names[] = {
+ "UNKONWN",
+ "GBIC",
+ "SFF",
+ "SFP",
+ NULL,
+};
+
+/* Flags for SFP modules compatible with ETH up to 1Gb */
+struct sfp_flags {
+ u8 e1000_base_sx:1;
+ u8 e1000_base_lx:1;
+ u8 e1000_base_cx:1;
+ u8 e1000_base_t:1;
+ u8 e100_base_lx:1;
+ u8 e100_base_fx:1;
+ u8 e10_base_bx10:1;
+ u8 e10_base_px:1;
+};
+
+#define STRING_APPEND(str, src) \
+ strncat(str, src, sizeof(src)); \
+ for (i = 1; i < sizeof(str); i++) \
+ if (str[i-1] == ' ' && str[i] == ' ') \
+ str[i] = 0;
+
+static int gw16083_read_port_sfp(struct i2c_client *client,
+ struct mv88e1111_port_state *state)
+{
+ int ret = 0;
+ u8 data[256];
+ struct sfp_flags *eth_flags;
+ u8 crc;
+ int i;
+ u8 *str;
+ struct sfp_msa *sfp_msa = (struct sfp_msa *)data;
+ int port = state->port;
+ union i2c_smbus_data d;
+
+ dev_dbg(&client->dev, "%s Port%d\n", __func__, port);
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_READ_I2C_BLOCK))
+ return -ENODEV;
+ d.byte = (port == 5) ? 1 : 2;
+ if (i2c_smbus_xfer(client->adapter, GW16083_I2C_ADDR_PCA9543,
+ client->flags, I2C_SMBUS_WRITE, 0,
+ I2C_SMBUS_BYTE_DATA, &d) < 0)
+ {
+ dev_err(&client->dev,
+ "Port%d: failed writing PCA9543 register\n", port);
+ return ret;
+ }
+
+ /* read all 256 bytes of SFP EEPROM */
+ for (i = 0; i < sizeof(data); i += I2C_SMBUS_BLOCK_MAX) {
+ d.block[0] = I2C_SMBUS_BLOCK_MAX;
+ if (i2c_smbus_xfer(client->adapter, GW16083_I2C_ADDR_SFP1,
+ client->flags, I2C_SMBUS_READ, i,
+ I2C_SMBUS_I2C_BLOCK_DATA, &d) < 0)
+ {
+ dev_err(&client->dev,
+ "Port%d: failed reading SFP data\n", port);
+ return ret;
+ }
+ memcpy(data + i, d.block + 1, I2C_SMBUS_BLOCK_MAX);
+ }
+
+ /* Validate checksums */
+ for (crc = 0, i = 0; i < 63; i++)
+ crc += data[i];
+ if (crc != sfp_msa->cc_base) {
+ dev_err(&client->dev, "Port%d: "
+ "Checksum failure for Base ID fields: 0x%02x\n", port,
+ crc);
+#ifdef FAIL_ON_CHECKSUM_ERR
+ return -EINVAL;
+#endif
+ }
+ for (crc = 0, i = 64; i < 95; i++)
+ crc += data[i];
+ if (crc != sfp_msa->cc_ext) {
+ dev_err(&client->dev, "Port%d: "
+ "Checksum failure for Extended ID fields: 0x%02x\n",
+ port, crc);
+#ifdef FAIL_ON_CHECKSUM_ERR
+ return -EINVAL;
+#endif
+ }
+ state->sfp_id[0] = 0;
+ for (i = 0; id_names[i]; i++) {
+ if (sfp_msa->identifier == i) {
+ sprintf(state->sfp_id, "%s: ", id_names[i]);
+ break;
+ }
+ }
+ STRING_APPEND(state->sfp_id, sfp_msa->vendor_oui);
+ STRING_APPEND(state->sfp_id, sfp_msa->vendor_name);
+ STRING_APPEND(state->sfp_id, sfp_msa->vendor_pn);
+ STRING_APPEND(state->sfp_id, sfp_msa->vendor_rev);
+ STRING_APPEND(state->sfp_id, sfp_msa->vendor_sn);
+ dev_info(&client->dev, "Port%d: %s\n", port, state->sfp_id);
+
+ if ((sfp_msa->identifier != GBIC) &&
+ (sfp_msa->identifier != SFF) &&
+ (sfp_msa->identifier != SFP))
+ {
+ dev_err(&client->dev, "Port%d: Unknown module identifier: %d\n",
+ port, sfp_msa->identifier);
+ return -EINVAL;
+ }
+
+ str = "";
+ eth_flags = (struct sfp_flags *)(sfp_msa->transceiver + 3);
+ if (eth_flags->e1000_base_sx) {
+ str = "1000Base-SX (Fiber)";
+ } else if (eth_flags->e1000_base_lx) {
+ str = "1000Base-LX (Fiber)";
+ } else if (eth_flags->e1000_base_t) {
+ str = "1000Base-T (Copper)";
+ } else if (eth_flags->e100_base_fx) {
+ str = "100Base-FX (Fiber) - not supported";
+ ret = -EINVAL;
+ } else {
+ str = "Unknown/Unsupported media type";
+ ret = -EINVAL;
+ }
+ if (ret)
+ dev_err(&client->dev, "Port%d: %s (0x%02x)\n", port, str,
+ sfp_msa->transceiver[3]);
+ else
+ dev_info(&client->dev, "Port%d: %s (0x%02x)\n", port, str,
+ sfp_msa->transceiver[3]);
+
+ return ret;
+}
+
+static int gw16083_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+
+ dev_info(&client->dev, "GW16083 Ethernet Expansion Mezzanine\n");
+ if (gw16083_client) {
+ dev_err(&client->dev, "client already registered\n");
+ return -EINVAL;
+ }
+ gw16083_client = client;
+
+ ret = phy_driver_register(&mv88e6176_phy_driver);
+ if (ret)
+ dev_err(&client->dev,
+ "failed to register mv88e6176 phy driver: %d\n", ret);
+ return ret;
+}
+
+static int gw16083_remove(struct i2c_client *client)
+{
+ dev_dbg(&client->dev, "%s\n", __func__);
+
+ phy_driver_unregister(&mv88e6176_phy_driver);
+ gw16083_client = NULL;
+ return 0;
+}
+
+static const struct of_device_id gw16083_dt_ids[] = {
+ { .compatible = "gateworks,gw16083", },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, gw16083_dt_ids);
+
+static const struct i2c_device_id gw16083_id[] = {
+ { "gw16083", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, gw16083_id);
+
+static struct i2c_driver gw16083_driver = {
+ .driver = {
+ .name = "gw16083",
+ .of_match_table = gw16083_dt_ids,
+ },
+ .probe = gw16083_probe,
+ .remove = gw16083_remove,
+ .id_table = gw16083_id,
+};
+
+static int __init mv88e6176_init(void)
+{
+ return i2c_add_driver(&gw16083_driver);
+}
+
+static void __exit mv88e6176_exit(void)
+{
+ i2c_del_driver(&gw16083_driver);
+}
+
+module_init(mv88e6176_init);
+module_exit(mv88e6176_exit);
projects / openwrt.git / blobdiff