This patch adds support for having a "fixed-link" to some other MAC (like some embedded switch-device).
For this purpose we introduce a new phy-driver, called "Fixed PHY". Fixed PHY works only with CONFIG_DM_ETH enabled, since the fixed-link is described with a subnode below ethernet interface. Most ethernet drivers (unfortunately not all are following same scheme for searching/attaching phys) are calling "phy_connect(...)" for getting a phy-device. At this point we link in, we search here for a subnode called "fixed- link", once found we start phy_device_create(...) with the special phy- id PHY_FIXED_ID (0xa5a55a5a). During init the "Fixed PHY" driver has registered with this id and now gets probed, during probe we get all the details about fixed-link out of dts, later on the phy reports this values. Signed-off-by: Hannes Schmelzer <[email protected]> --- drivers/net/phy/Makefile | 1 + drivers/net/phy/fixed.c | 86 ++++++++++++++++++++++++++++++++++++++++++++++++ drivers/net/phy/phy.c | 23 +++++++++++-- include/phy.h | 3 ++ 4 files changed, 110 insertions(+), 3 deletions(-) create mode 100644 drivers/net/phy/fixed.c diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index d372971..88c00a5 100644 --- a/drivers/net/phy/Makefile +++ b/drivers/net/phy/Makefile @@ -28,3 +28,4 @@ obj-$(CONFIG_PHY_TI) += ti.o obj-$(CONFIG_PHY_XILINX) += xilinx_phy.o obj-$(CONFIG_PHY_VITESSE) += vitesse.o obj-$(CONFIG_PHY_MSCC) += mscc.o +obj-$(CONFIG_PHY_FIXED) += fixed.o diff --git a/drivers/net/phy/fixed.c b/drivers/net/phy/fixed.c new file mode 100644 index 0000000..fc86a3f --- /dev/null +++ b/drivers/net/phy/fixed.c @@ -0,0 +1,86 @@ +/* + * Fixed-Link phy + * + * Copyright 2017 Bernecker & Rainer Industrieelektronik GmbH + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <config.h> +#include <common.h> +#include <phy.h> +#include <dm.h> +#include <fdt_support.h> + +DECLARE_GLOBAL_DATA_PTR; + +int fixedphy_probe(struct phy_device *phydev) +{ + struct fixed_link *priv; + int ofnode = phydev->addr; + u32 val; + + debug("%s: start.\n", __func__); + /* check for mandatory properties within fixed-link node */ + val = fdt_getprop_u32_default_node(gd->fdt_blob, + ofnode, 0, "speed", ~0UL); + if (val == ~0UL || + (val != SPEED_10 && val != SPEED_1000 && val != SPEED_1000)) { + printf("ERROR: no/invalid speed given in fixed-link node!"); + return -1; + } + + priv = malloc(sizeof(*priv)); + if (!priv) + return -ENOMEM; + memset(priv, 0, sizeof(*priv)); + + phydev->priv = priv; + phydev->addr = 0; + + priv->link_speed = val; + priv->duplex = fdtdec_get_bool(gd->fdt_blob, ofnode, "full-duplex"); + priv->pause = fdtdec_get_bool(gd->fdt_blob, ofnode, "pause"); + priv->asym_pause = fdtdec_get_bool(gd->fdt_blob, ofnode, "asym-pause"); + + /* set this for preventing stack doing some unary reset */ + phydev->flags |= PHY_FLAG_BROKEN_RESET; + + return 0; +} + +int fixedphy_startup(struct phy_device *phydev) +{ + struct fixed_link *priv = phydev->priv; + + debug("%s: start.\n", __func__); + + phydev->asym_pause = priv->asym_pause; + phydev->pause = priv->pause; + phydev->duplex = priv->duplex; + phydev->speed = priv->link_speed; + phydev->link = 1; + + return 0; +} + +int fixedphy_shutdown(struct phy_device *phydev) +{ + return 0; +} + +static struct phy_driver fixedphy_driver = { + .uid = PHY_FIXED_ID, + .mask = 0xffffffff, + .name = "Fixed PHY", + .features = PHY_GBIT_FEATURES | SUPPORTED_MII, + .probe = fixedphy_probe, + .startup = fixedphy_startup, + .shutdown = fixedphy_shutdown, +}; + +int phy_fixed_init(void) +{ + phy_register(&fixedphy_driver); + return 0; +} diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 8db6574..a569d0b 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -515,7 +515,9 @@ int phy_init(void) #ifdef CONFIG_PHY_MSCC phy_mscc_init(); #endif - +#ifdef CONFIG_PHY_FIXED + phy_fixed_init(); +#endif return 0; } @@ -854,9 +856,24 @@ struct phy_device *phy_connect(struct mii_dev *bus, int addr, struct eth_device *dev, phy_interface_t interface) #endif { - struct phy_device *phydev; + struct phy_device *phydev = NULL; +#if defined(CONFIG_DM_ETH) && defined(CONFIG_PHY_FIXED) + int sn; + const char *name; + sn = fdt_first_subnode(gd->fdt_blob, dev->of_offset); + while (sn > 0) { + name = fdt_get_name(gd->fdt_blob, sn, NULL); + if (name != NULL && strcmp(name, "fixed-link") == 0) { + phydev = phy_device_create(bus, + sn, PHY_FIXED_ID, interface); + break; + } + sn = fdt_next_subnode(gd->fdt_blob, sn); + } +#endif + if (phydev == NULL) + phydev = phy_find_by_mask(bus, 1 << addr, interface); - phydev = phy_find_by_mask(bus, 1 << addr, interface); if (phydev) phy_connect_dev(phydev, dev); else diff --git a/include/phy.h b/include/phy.h index 5477496..f5fdc04 100644 --- a/include/phy.h +++ b/include/phy.h @@ -15,6 +15,8 @@ #include <linux/ethtool.h> #include <linux/mdio.h> +#define PHY_FIXED_ID 0xa5a55a5a + #define PHY_MAX_ADDR 32 #define PHY_FLAG_BROKEN_RESET (1 << 0) /* soft reset not supported */ @@ -267,6 +269,7 @@ int phy_ti_init(void); int phy_vitesse_init(void); int phy_xilinx_init(void); int phy_mscc_init(void); +int phy_fixed_init(void); int board_phy_config(struct phy_device *phydev); int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id); -- 1.9.1 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
