diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/faraday/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/faraday/ftgmac100.c | 37 | ||||
| -rw-r--r-- | drivers/net/phy/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/net/phy/Makefile | 1 | ||||
| -rw-r--r-- | drivers/net/phy/mdio-aspeed.c | 157 |
5 files changed, 205 insertions, 4 deletions
diff --git a/drivers/net/ethernet/faraday/Kconfig b/drivers/net/ethernet/faraday/Kconfig index a9b105803fb7..73e4f2648e49 100644 --- a/drivers/net/ethernet/faraday/Kconfig +++ b/drivers/net/ethernet/faraday/Kconfig @@ -32,6 +32,7 @@ config FTGMAC100 depends on ARM || NDS32 || COMPILE_TEST depends on !64BIT || BROKEN select PHYLIB + select MDIO_ASPEED if MACH_ASPEED_G6 ---help--- This driver supports the FTGMAC100 Gigabit Ethernet controller from Faraday. It is used on Faraday A369, Andes AG102 and some diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c index dc8d3e726e75..9b7af94a40bb 100644 --- a/drivers/net/ethernet/faraday/ftgmac100.c +++ b/drivers/net/ethernet/faraday/ftgmac100.c @@ -17,6 +17,7 @@ #include <linux/module.h> #include <linux/netdevice.h> #include <linux/of.h> +#include <linux/of_mdio.h> #include <linux/phy.h> #include <linux/platform_device.h> #include <linux/property.h> @@ -1619,8 +1620,13 @@ static int ftgmac100_setup_mdio(struct net_device *netdev) if (!priv->mii_bus) return -EIO; - if (priv->is_aspeed) { - /* This driver supports the old MDIO interface */ + if (of_device_is_compatible(np, "aspeed,ast2400-mac") || + of_device_is_compatible(np, "aspeed,ast2500-mac")) { + /* The AST2600 has a separate MDIO controller */ + + /* For the AST2400 and AST2500 this driver only supports the + * old MDIO interface + */ reg = ioread32(priv->base + FTGMAC100_OFFSET_REVR); reg &= ~FTGMAC100_REVR_NEW_MDIO_INTERFACE; iowrite32(reg, priv->base + FTGMAC100_OFFSET_REVR); @@ -1797,7 +1803,8 @@ static int ftgmac100_probe(struct platform_device *pdev) np = pdev->dev.of_node; if (np && (of_device_is_compatible(np, "aspeed,ast2400-mac") || - of_device_is_compatible(np, "aspeed,ast2500-mac"))) { + of_device_is_compatible(np, "aspeed,ast2500-mac") || + of_device_is_compatible(np, "aspeed,ast2600-mac"))) { priv->rxdes0_edorr_mask = BIT(30); priv->txdes0_edotr_mask = BIT(30); priv->is_aspeed = true; @@ -1817,7 +1824,29 @@ static int ftgmac100_probe(struct platform_device *pdev) priv->ndev = ncsi_register_dev(netdev, ftgmac100_ncsi_handler); if (!priv->ndev) goto err_ncsi_dev; - } else { + } else if (np && of_get_property(np, "phy-handle", NULL)) { + struct phy_device *phy; + + phy = of_phy_get_and_connect(priv->netdev, np, + &ftgmac100_adjust_link); + if (!phy) { + dev_err(&pdev->dev, "Failed to connect to phy\n"); + goto err_setup_mdio; + } + + /* Indicate that we support PAUSE frames (see comment in + * Documentation/networking/phy.txt) + */ + phy_support_asym_pause(phy); + + /* Display what we found */ + phy_attached_info(phy); + } else if (np && !of_get_child_by_name(np, "mdio")) { + /* Support legacy ASPEED devicetree descriptions that decribe a + * MAC with an embedded MDIO controller but have no "mdio" + * child node. Automatically scan the MDIO bus for available + * PHYs. + */ priv->use_ncsi = false; err = ftgmac100_setup_mdio(netdev); if (err) diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig index 20f14c5fbb7e..206d8650ee7f 100644 --- a/drivers/net/phy/Kconfig +++ b/drivers/net/phy/Kconfig @@ -21,6 +21,19 @@ config MDIO_BUS if MDIO_BUS +config MDIO_ASPEED + tristate "ASPEED MDIO bus controller" + depends on ARCH_ASPEED || COMPILE_TEST + depends on OF_MDIO && HAS_IOMEM + help + This module provides a driver for the independent MDIO bus + controllers found in the ASPEED AST2600 SoC. This is a driver for the + third revision of the ASPEED MDIO register interface - the first two + revisions are the "old" and "new" interfaces found in the AST2400 and + AST2500, embedded in the MAC. For legacy reasons, FTGMAC100 driver + continues to drive the embedded MDIO controller for the AST2400 and + AST2500 SoCs, so say N if AST2600 support is not required. + config MDIO_BCM_IPROC tristate "Broadcom iProc MDIO bus controller" depends on ARCH_BCM_IPROC || COMPILE_TEST diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 839acb292c38..ba07c27e4208 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -22,6 +22,7 @@ libphy-$(CONFIG_LED_TRIGGER_PHY) += phy_led_triggers.o obj-$(CONFIG_PHYLINK) += phylink.o obj-$(CONFIG_PHYLIB) += libphy.o +obj-$(CONFIG_MDIO_ASPEED) += mdio-aspeed.o obj-$(CONFIG_MDIO_BCM_IPROC) += mdio-bcm-iproc.o obj-$(CONFIG_MDIO_BCM_UNIMAC) += mdio-bcm-unimac.o obj-$(CONFIG_MDIO_BITBANG) += mdio-bitbang.o diff --git a/drivers/net/phy/mdio-aspeed.c b/drivers/net/phy/mdio-aspeed.c new file mode 100644 index 000000000000..cad820568f75 --- /dev/null +++ b/drivers/net/phy/mdio-aspeed.c @@ -0,0 +1,157 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* Copyright (C) 2019 IBM Corp. */ + +#include <linux/bitfield.h> +#include <linux/delay.h> +#include <linux/iopoll.h> +#include <linux/mdio.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_mdio.h> +#include <linux/phy.h> +#include <linux/platform_device.h> + +#define DRV_NAME "mdio-aspeed" + +#define ASPEED_MDIO_CTRL 0x0 +#define ASPEED_MDIO_CTRL_FIRE BIT(31) +#define ASPEED_MDIO_CTRL_ST BIT(28) +#define ASPEED_MDIO_CTRL_ST_C45 0 +#define ASPEED_MDIO_CTRL_ST_C22 1 +#define ASPEED_MDIO_CTRL_OP GENMASK(27, 26) +#define MDIO_C22_OP_WRITE 0b01 +#define MDIO_C22_OP_READ 0b10 +#define ASPEED_MDIO_CTRL_PHYAD GENMASK(25, 21) +#define ASPEED_MDIO_CTRL_REGAD GENMASK(20, 16) +#define ASPEED_MDIO_CTRL_MIIWDATA GENMASK(15, 0) + +#define ASPEED_MDIO_DATA 0x4 +#define ASPEED_MDIO_DATA_MDC_THRES GENMASK(31, 24) +#define ASPEED_MDIO_DATA_MDIO_EDGE BIT(23) +#define ASPEED_MDIO_DATA_MDIO_LATCH GENMASK(22, 20) +#define ASPEED_MDIO_DATA_IDLE BIT(16) +#define ASPEED_MDIO_DATA_MIIRDATA GENMASK(15, 0) + +#define ASPEED_MDIO_INTERVAL_US 100 +#define ASPEED_MDIO_TIMEOUT_US (ASPEED_MDIO_INTERVAL_US * 10) + +struct aspeed_mdio { + void __iomem *base; +}; + +static int aspeed_mdio_read(struct mii_bus *bus, int addr, int regnum) +{ + struct aspeed_mdio *ctx = bus->priv; + u32 ctrl; + u32 data; + int rc; + + dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d\n", __func__, addr, + regnum); + + /* Just clause 22 for the moment */ + if (regnum & MII_ADDR_C45) + return -EOPNOTSUPP; + + ctrl = ASPEED_MDIO_CTRL_FIRE + | FIELD_PREP(ASPEED_MDIO_CTRL_ST, ASPEED_MDIO_CTRL_ST_C22) + | FIELD_PREP(ASPEED_MDIO_CTRL_OP, MDIO_C22_OP_READ) + | FIELD_PREP(ASPEED_MDIO_CTRL_PHYAD, addr) + | FIELD_PREP(ASPEED_MDIO_CTRL_REGAD, regnum); + + iowrite32(ctrl, ctx->base + ASPEED_MDIO_CTRL); + + rc = readl_poll_timeout(ctx->base + ASPEED_MDIO_DATA, data, + data & ASPEED_MDIO_DATA_IDLE, + ASPEED_MDIO_INTERVAL_US, + ASPEED_MDIO_TIMEOUT_US); + if (rc < 0) + return rc; + + return FIELD_GET(ASPEED_MDIO_DATA_MIIRDATA, data); +} + +static int aspeed_mdio_write(struct mii_bus *bus, int addr, int regnum, u16 val) +{ + struct aspeed_mdio *ctx = bus->priv; + u32 ctrl; + + dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d, val: 0x%x\n", + __func__, addr, regnum, val); + + /* Just clause 22 for the moment */ + if (regnum & MII_ADDR_C45) + return -EOPNOTSUPP; + + ctrl = ASPEED_MDIO_CTRL_FIRE + | FIELD_PREP(ASPEED_MDIO_CTRL_ST, ASPEED_MDIO_CTRL_ST_C22) + | FIELD_PREP(ASPEED_MDIO_CTRL_OP, MDIO_C22_OP_WRITE) + | FIELD_PREP(ASPEED_MDIO_CTRL_PHYAD, addr) + | FIELD_PREP(ASPEED_MDIO_CTRL_REGAD, regnum) + | FIELD_PREP(ASPEED_MDIO_CTRL_MIIWDATA, val); + + iowrite32(ctrl, ctx->base + ASPEED_MDIO_CTRL); + + return readl_poll_timeout(ctx->base + ASPEED_MDIO_CTRL, ctrl, + !(ctrl & ASPEED_MDIO_CTRL_FIRE), + ASPEED_MDIO_INTERVAL_US, + ASPEED_MDIO_TIMEOUT_US); +} + +static int aspeed_mdio_probe(struct platform_device *pdev) +{ + struct aspeed_mdio *ctx; + struct mii_bus *bus; + int rc; + + bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*ctx)); + if (!bus) + return -ENOMEM; + + ctx = bus->priv; + ctx->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(ctx->base)) + return PTR_ERR(ctx->base); + + bus->name = DRV_NAME; + snprintf(bus->id, MII_BUS_ID_SIZE, "%s%d", pdev->name, pdev->id); + bus->parent = &pdev->dev; + bus->read = aspeed_mdio_read; + bus->write = aspeed_mdio_write; + + rc = of_mdiobus_register(bus, pdev->dev.of_node); + if (rc) { + dev_err(&pdev->dev, "Cannot register MDIO bus!\n"); + return rc; + } + + platform_set_drvdata(pdev, bus); + + return 0; +} + +static int aspeed_mdio_remove(struct platform_device *pdev) +{ + mdiobus_unregister(platform_get_drvdata(pdev)); + + return 0; +} + +static const struct of_device_id aspeed_mdio_of_match[] = { + { .compatible = "aspeed,ast2600-mdio", }, + { }, +}; + +static struct platform_driver aspeed_mdio_driver = { + .driver = { + .name = DRV_NAME, + .of_match_table = aspeed_mdio_of_match, + }, + .probe = aspeed_mdio_probe, + .remove = aspeed_mdio_remove, +}; + +module_platform_driver(aspeed_mdio_driver); + +MODULE_AUTHOR("Andrew Jeffery <andrew@aj.id.au>"); +MODULE_LICENSE("GPL"); |