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common/miiphyutil.c
11.9 KB
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// SPDX-License-Identifier: GPL-2.0+ |
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/* * (C) Copyright 2001 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com. |
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*/ /* * This provides a bit-banged interface to the ethernet MII management * channel. */ #include <common.h> |
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#include <dm.h> |
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#include <miiphy.h> |
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#include <phy.h> |
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|
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#include <asm/types.h> #include <linux/list.h> #include <malloc.h> #include <net.h> /* local debug macro */ |
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#undef MII_DEBUG #undef debug #ifdef MII_DEBUG |
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#define debug(fmt, args...) printf(fmt, ##args) |
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#else |
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#define debug(fmt, args...) |
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#endif /* MII_DEBUG */ |
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static struct list_head mii_devs; static struct mii_dev *current_mii; |
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/* * Lookup the mii_dev struct by the registered device name. */ |
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struct mii_dev *miiphy_get_dev_by_name(const char *devname) |
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{ struct list_head *entry; struct mii_dev *dev; if (!devname) { printf("NULL device name! "); return NULL; } list_for_each(entry, &mii_devs) { dev = list_entry(entry, struct mii_dev, link); if (strcmp(dev->name, devname) == 0) return dev; } |
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return NULL; } |
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/***************************************************************************** * |
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* Initialize global data. Need to be called before any other miiphy routine. */ |
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void miiphy_init(void) |
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{ |
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INIT_LIST_HEAD(&mii_devs); |
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current_mii = NULL; |
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} |
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struct mii_dev *mdio_alloc(void) { struct mii_dev *bus; bus = malloc(sizeof(*bus)); if (!bus) return bus; memset(bus, 0, sizeof(*bus)); /* initalize mii_dev struct fields */ INIT_LIST_HEAD(&bus->link); return bus; } |
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void mdio_free(struct mii_dev *bus) { free(bus); } |
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int mdio_register(struct mii_dev *bus) { |
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if (!bus || !bus->read || !bus->write) |
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return -1; /* check if we have unique name */ if (miiphy_get_dev_by_name(bus->name)) { printf("mdio_register: non unique device name '%s' ", bus->name); return -1; } /* add it to the list */ list_add_tail(&bus->link, &mii_devs); if (!current_mii) current_mii = bus; return 0; } |
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int mdio_register_seq(struct mii_dev *bus, int seq) { int ret; /* Setup a unique name for each mdio bus */ ret = snprintf(bus->name, MDIO_NAME_LEN, "eth%d", seq); if (ret < 0) return ret; return mdio_register(bus); } |
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int mdio_unregister(struct mii_dev *bus) { if (!bus) return 0; /* delete it from the list */ list_del(&bus->link); if (current_mii == bus) current_mii = NULL; return 0; } |
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void mdio_list_devices(void) { struct list_head *entry; list_for_each(entry, &mii_devs) { int i; struct mii_dev *bus = list_entry(entry, struct mii_dev, link); printf("%s: ", bus->name); for (i = 0; i < PHY_MAX_ADDR; i++) { struct phy_device *phydev = bus->phymap[i]; if (phydev) { |
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printf("%x - %s", i, phydev->drv->name); |
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if (phydev->dev) printf(" <--> %s ", phydev->dev->name); else printf(" "); } } } } |
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int miiphy_set_current_dev(const char *devname) |
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{ |
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struct mii_dev *dev; |
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dev = miiphy_get_dev_by_name(devname); |
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if (dev) { current_mii = dev; return 0; |
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} |
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printf("No such device: %s ", devname); |
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return 1; } |
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struct mii_dev *mdio_get_current_dev(void) { return current_mii; } |
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struct list_head *mdio_get_list_head(void) { return &mii_devs; } |
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struct phy_device *mdio_phydev_for_ethname(const char *ethname) { struct list_head *entry; struct mii_dev *bus; list_for_each(entry, &mii_devs) { int i; bus = list_entry(entry, struct mii_dev, link); for (i = 0; i < PHY_MAX_ADDR; i++) { if (!bus->phymap[i] || !bus->phymap[i]->dev) continue; if (strcmp(bus->phymap[i]->dev->name, ethname) == 0) return bus->phymap[i]; } } printf("%s is not a known ethernet ", ethname); return NULL; } |
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const char *miiphy_get_current_dev(void) |
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{ if (current_mii) return current_mii->name; return NULL; } |
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static struct mii_dev *miiphy_get_active_dev(const char *devname) { /* If the current mii is the one we want, return it */ if (current_mii) if (strcmp(current_mii->name, devname) == 0) return current_mii; /* Otherwise, set the active one to the one we want */ if (miiphy_set_current_dev(devname)) return NULL; else return current_mii; } |
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/***************************************************************************** * * Read to variable <value> from the PHY attached to device <devname>, * use PHY address <addr> and register <reg>. * |
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* This API is deprecated. Use phy_read on a phy_device found via phy_connect * |
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* Returns: * 0 on success */ |
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int miiphy_read(const char *devname, unsigned char addr, unsigned char reg, |
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unsigned short *value) |
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{ |
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struct mii_dev *bus; |
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int ret; |
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|
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bus = miiphy_get_active_dev(devname); |
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if (!bus) |
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return 1; |
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|
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ret = bus->read(bus, addr, MDIO_DEVAD_NONE, reg); if (ret < 0) return 1; *value = (unsigned short)ret; return 0; |
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} /***************************************************************************** * * Write <value> to the PHY attached to device <devname>, * use PHY address <addr> and register <reg>. * |
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* This API is deprecated. Use phy_write on a phy_device found by phy_connect * |
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* Returns: * 0 on success */ |
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int miiphy_write(const char *devname, unsigned char addr, unsigned char reg, |
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unsigned short value) |
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{ |
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struct mii_dev *bus; |
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|
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bus = miiphy_get_active_dev(devname); if (bus) return bus->write(bus, addr, MDIO_DEVAD_NONE, reg, value); |
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|
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return 1; |
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} /***************************************************************************** * * Print out list of registered MII capable devices. */ |
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void miiphy_listdev(void) |
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{ struct list_head *entry; struct mii_dev *dev; |
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puts("MII devices: "); list_for_each(entry, &mii_devs) { dev = list_entry(entry, struct mii_dev, link); printf("'%s' ", dev->name); |
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} |
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puts(" "); |
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if (current_mii) |
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printf("Current device: '%s' ", current_mii->name); |
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} |
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/***************************************************************************** * * Read the OUI, manufacture's model number, and revision number. * * OUI: 22 bits (unsigned int) * Model: 6 bits (unsigned char) * Revision: 4 bits (unsigned char) * |
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* This API is deprecated. * |
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* Returns: * 0 on success */ |
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int miiphy_info(const char *devname, unsigned char addr, unsigned int *oui, |
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unsigned char *model, unsigned char *rev) { unsigned int reg = 0; |
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unsigned short tmp; |
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|
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if (miiphy_read(devname, addr, MII_PHYSID2, &tmp) != 0) { debug("PHY ID register 2 read failed "); return -1; |
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} |
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reg = tmp; |
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|
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debug("MII_PHYSID2 @ 0x%x = 0x%04x ", addr, reg); |
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|
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if (reg == 0xFFFF) { /* No physical device present at this address */ |
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return -1; |
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} |
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if (miiphy_read(devname, addr, MII_PHYSID1, &tmp) != 0) { debug("PHY ID register 1 read failed "); return -1; |
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} |
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reg |= tmp << 16; |
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debug("PHY_PHYIDR[1,2] @ 0x%x = 0x%08x ", addr, reg); |
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|
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*oui = (reg >> 10); *model = (unsigned char)((reg >> 4) & 0x0000003F); *rev = (unsigned char)(reg & 0x0000000F); |
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return 0; |
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} |
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#ifndef CONFIG_PHYLIB |
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/***************************************************************************** * * Reset the PHY. |
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* * This API is deprecated. Use PHYLIB. * |
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* Returns: * 0 on success */ |
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int miiphy_reset(const char *devname, unsigned char addr) |
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{ unsigned short reg; |
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int timeout = 500; |
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|
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if (miiphy_read(devname, addr, MII_BMCR, ®) != 0) { debug("PHY status read failed "); return -1; |
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} |
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if (miiphy_write(devname, addr, MII_BMCR, reg | BMCR_RESET) != 0) { debug("PHY reset failed "); return -1; |
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} |
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#ifdef CONFIG_PHY_RESET_DELAY |
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udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */ |
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#endif |
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/* * Poll the control register for the reset bit to go to 0 (it is * auto-clearing). This should happen within 0.5 seconds per the * IEEE spec. */ |
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reg = 0x8000; |
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while (((reg & 0x8000) != 0) && timeout--) { |
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if (miiphy_read(devname, addr, MII_BMCR, ®) != 0) { |
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debug("PHY status read failed "); return -1; |
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} |
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udelay(1000); |
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} if ((reg & 0x8000) == 0) { |
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return 0; |
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} else { |
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puts("PHY reset timed out "); return -1; |
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} |
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return 0; |
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} |
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#endif /* !PHYLIB */ |
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|
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/***************************************************************************** * |
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* Determine the ethernet speed (10/100/1000). Return 10 on error. |
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*/ |
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int miiphy_speed(const char *devname, unsigned char addr) |
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{ |
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u16 bmcr, anlpar, adv; |
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|
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#if defined(CONFIG_PHY_GIGE) |
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u16 btsr; /* * Check for 1000BASE-X. If it is supported, then assume that the speed * is 1000. */ |
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if (miiphy_is_1000base_x(devname, addr)) |
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return _1000BASET; |
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|
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/* * No 1000BASE-X, so assume 1000BASE-T/100BASE-TX/10BASE-T register set. */ /* Check for 1000BASE-T. */ |
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if (miiphy_read(devname, addr, MII_STAT1000, &btsr)) { printf("PHY 1000BT status"); |
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goto miiphy_read_failed; } if (btsr != 0xFFFF && |
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(btsr & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD))) |
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return _1000BASET; |
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#endif /* CONFIG_PHY_GIGE */ |
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|
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/* Check Basic Management Control Register first. */ |
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if (miiphy_read(devname, addr, MII_BMCR, &bmcr)) { printf("PHY speed"); |
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goto miiphy_read_failed; |
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} |
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/* Check if auto-negotiation is on. */ |
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if (bmcr & BMCR_ANENABLE) { |
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/* Get auto-negotiation results. */ |
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if (miiphy_read(devname, addr, MII_LPA, &anlpar)) { printf("PHY AN speed"); |
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goto miiphy_read_failed; |
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} |
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if (miiphy_read(devname, addr, MII_ADVERTISE, &adv)) { puts("PHY AN adv speed"); goto miiphy_read_failed; } return ((anlpar & adv) & LPA_100) ? _100BASET : _10BASET; |
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} /* Get speed from basic control settings. */ |
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return (bmcr & BMCR_SPEED100) ? _100BASET : _10BASET; |
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|
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miiphy_read_failed: |
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printf(" read failed, assuming 10BASE-T "); |
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return _10BASET; |
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} |
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/***************************************************************************** * |
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* Determine full/half duplex. Return half on error. |
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*/ |
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int miiphy_duplex(const char *devname, unsigned char addr) |
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{ |
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u16 bmcr, anlpar, adv; |
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|
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#if defined(CONFIG_PHY_GIGE) |
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u16 btsr; /* Check for 1000BASE-X. */ |
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if (miiphy_is_1000base_x(devname, addr)) { |
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/* 1000BASE-X */ |
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if (miiphy_read(devname, addr, MII_LPA, &anlpar)) { printf("1000BASE-X PHY AN duplex"); |
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goto miiphy_read_failed; } } /* * No 1000BASE-X, so assume 1000BASE-T/100BASE-TX/10BASE-T register set. */ /* Check for 1000BASE-T. */ |
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if (miiphy_read(devname, addr, MII_STAT1000, &btsr)) { printf("PHY 1000BT status"); |
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goto miiphy_read_failed; } if (btsr != 0xFFFF) { if (btsr & PHY_1000BTSR_1000FD) { return FULL; } else if (btsr & PHY_1000BTSR_1000HD) { return HALF; |
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} } |
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#endif /* CONFIG_PHY_GIGE */ |
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|
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/* Check Basic Management Control Register first. */ |
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if (miiphy_read(devname, addr, MII_BMCR, &bmcr)) { puts("PHY duplex"); |
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goto miiphy_read_failed; |
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} |
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/* Check if auto-negotiation is on. */ |
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if (bmcr & BMCR_ANENABLE) { |
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/* Get auto-negotiation results. */ |
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if (miiphy_read(devname, addr, MII_LPA, &anlpar)) { puts("PHY AN duplex"); |
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goto miiphy_read_failed; |
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} |
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if (miiphy_read(devname, addr, MII_ADVERTISE, &adv)) { puts("PHY AN adv duplex"); goto miiphy_read_failed; } return ((anlpar & adv) & (LPA_10FULL | LPA_100FULL)) ? |
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FULL : HALF; |
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} /* Get speed from basic control settings. */ |
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return (bmcr & BMCR_FULLDPLX) ? FULL : HALF; |
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|
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miiphy_read_failed: |
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printf(" read failed, assuming half duplex "); |
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return HALF; } |
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/***************************************************************************** * * Return 1 if PHY supports 1000BASE-X, 0 if PHY supports 10BASE-T/100BASE-TX/ * 1000BASE-T, or on error. */ |
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int miiphy_is_1000base_x(const char *devname, unsigned char addr) |
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{ #if defined(CONFIG_PHY_GIGE) u16 exsr; |
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if (miiphy_read(devname, addr, MII_ESTATUS, &exsr)) { printf("PHY extended status read failed, assuming no " |
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"1000BASE-X "); return 0; } |
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return 0 != (exsr & (ESTATUS_1000XF | ESTATUS_1000XH)); |
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#else return 0; #endif |
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} |
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#ifdef CONFIG_SYS_FAULT_ECHO_LINK_DOWN |
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/***************************************************************************** * * Determine link status */ |
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int miiphy_link(const char *devname, unsigned char addr) |
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{ unsigned short reg; |
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/* dummy read; needed to latch some phys */ |
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(void)miiphy_read(devname, addr, MII_BMSR, ®); if (miiphy_read(devname, addr, MII_BMSR, ®)) { puts("MII_BMSR read failed, assuming no link "); return 0; |
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} /* Determine if a link is active */ |
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if ((reg & BMSR_LSTATUS) != 0) { |
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return 1; |
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} else { |
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return 0; |
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} } #endif |