-/*
- * 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 / commitdiff