X-Git-Url: https://git.archive.openwrt.org/?p=openwrt.git;a=blobdiff_plain;f=target%2Flinux%2Fimx6%2Ffiles-4.4%2Fdrivers%2Fnet%2Fphy%2Fgw16083.c;fp=target%2Flinux%2Fimx6%2Ffiles-4.4%2Fdrivers%2Fnet%2Fphy%2Fgw16083.c;h=bdc7446ed3e8a19ccf9d7756160ccf8e308b3cb0;hp=0000000000000000000000000000000000000000;hb=17c53dbe5cc36b86ee25f517b53f37fa065b1266;hpb=385747486437e5dd2b80b07b800f98582b5716aa diff --git a/target/linux/imx6/files-4.4/drivers/net/phy/gw16083.c b/target/linux/imx6/files-4.4/drivers/net/phy/gw16083.c new file mode 100644 index 0000000000..bdc7446ed3 --- /dev/null +++ b/target/linux/imx6/files-4.4/drivers/net/phy/gw16083.c @@ -0,0 +1,1046 @@ +/* + * drivers/net/phy/gw16083.c + * + * Driver for GW16083 Ventana Ethernet Expansion Mezzanine + * + * Author: Tim Harvey + * + * Copyright (c) 2014 Tim Harvey + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#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);