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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2004-2008 Freescale Semiconductor, Inc.
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
*/
#include <common.h>
#include <config.h>
#include <net.h>
#include <netdev.h>
#include <asm/global_data.h>
#include <linux/delay.h>
#include <asm/fec.h>
#include <asm/immap.h>
#include <linux/mii.h>
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_CMD_NET)
#undef MII_DEBUG
#undef ET_DEBUG
/*extern int fecpin_setclear(struct eth_device *dev, int setclear);*/
#if defined(CONFIG_SYS_DISCOVER_PHY) || defined(CONFIG_CMD_MII)
#include <miiphy.h>
/* Make MII read/write commands for the FEC. */
#define mk_mii_read(ADDR, REG) (0x60020000 | ((ADDR << 23) | \
(REG & 0x1f) << 18))
#define mk_mii_write(ADDR, REG, VAL) (0x50020000 | ((ADDR << 23) | \
(REG & 0x1f) << 18) | (VAL & 0xffff))
#ifndef CFG_SYS_UNSPEC_PHYID
# define CFG_SYS_UNSPEC_PHYID 0
#endif
#ifndef CFG_SYS_UNSPEC_STRID
# define CFG_SYS_UNSPEC_STRID 0
#endif
typedef struct phy_info_struct {
u32 phyid;
char *strid;
} phy_info_t;
phy_info_t phyinfo[] = {
{0x0022561B, "AMD79C784VC"}, /* AMD 79C784VC */
{0x00406322, "BCM5222"}, /* Broadcom 5222 */
{0x02a80150, "Intel82555"}, /* Intel 82555 */
{0x0016f870, "LSI80225"}, /* LSI 80225 */
{0x0016f880, "LSI80225/B"}, /* LSI 80225/B */
{0x78100000, "LXT970"}, /* LXT970 */
{0x001378e0, "LXT971"}, /* LXT971 and 972 */
{0x00221619, "KS8721BL"}, /* Micrel KS8721BL/SL */
{0x00221512, "KSZ8041NL"}, /* Micrel KSZ8041NL */
{0x20005CE1, "N83640"}, /* National 83640 */
{0x20005C90, "N83848"}, /* National 83848 */
{0x20005CA2, "N83849"}, /* National 83849 */
{0x01814400, "QS6612"}, /* QS6612 */
#if defined(CFG_SYS_UNSPEC_PHYID) && defined(CFG_SYS_UNSPEC_STRID)
{CFG_SYS_UNSPEC_PHYID, CFG_SYS_UNSPEC_STRID},
#endif
{0, 0}
};
/*
* mii_init -- Initialize the MII for MII command without ethernet
* This function is a subset of eth_init
*/
void mii_reset(fec_info_t *info)
{
volatile FEC_T *fecp = (FEC_T *) (info->miibase);
int i;
fecp->ecr = FEC_ECR_RESET;
for (i = 0; (fecp->ecr & FEC_ECR_RESET) && (i < FEC_RESET_DELAY); ++i) {
udelay(1);
}
if (i == FEC_RESET_DELAY)
printf("FEC_RESET_DELAY timeout\n");
}
/* send command to phy using mii, wait for result */
uint mii_send(uint mii_cmd)
{
struct udevice *dev;
fec_info_t *info;
volatile FEC_T *ep;
uint mii_reply;
int j = 0;
/* retrieve from register structure */
dev = eth_get_dev();
info = dev_get_priv(dev);
ep = (FEC_T *) info->miibase;
ep->mmfr = mii_cmd; /* command to phy */
/* wait for mii complete */
while (!(ep->eir & FEC_EIR_MII) && (j < info->to_loop)) {
udelay(1);
j++;
}
if (j >= info->to_loop) {
printf("MII not complete\n");
return -1;
}
mii_reply = ep->mmfr; /* result from phy */
ep->eir = FEC_EIR_MII; /* clear MII complete */
#ifdef ET_DEBUG
printf("%s[%d] %s: sent=0x%8.8x, reply=0x%8.8x\n",
__FILE__, __LINE__, __FUNCTION__, mii_cmd, mii_reply);
#endif
return (mii_reply & 0xffff); /* data read from phy */
}
#endif /* CONFIG_SYS_DISCOVER_PHY || (CONFIG_MII) */
#if defined(CONFIG_SYS_DISCOVER_PHY)
int mii_discover_phy(fec_info_t *info)
{
#define MAX_PHY_PASSES 11
int phyaddr, pass;
uint phyno, phytype;
int i, found = 0;
if (info->phyname_init)
return info->phy_addr;
phyaddr = -1; /* didn't find a PHY yet */
for (pass = 1; pass <= MAX_PHY_PASSES && phyaddr < 0; ++pass) {
if (pass > 1) {
/* PHY may need more time to recover from reset.
* The LXT970 needs 50ms typical, no maximum is
* specified, so wait 10ms before try again.
* With 11 passes this gives it 100ms to wake up.
*/
udelay(10000); /* wait 10ms */
}
for (phyno = 0; phyno < 32 && phyaddr < 0; ++phyno) {
phytype = mii_send(mk_mii_read(phyno, MII_PHYSID1));
#ifdef ET_DEBUG
printf("PHY type 0x%x pass %d\n", phytype, pass);
#endif
if (phytype == 0xffff)
continue;
phyaddr = phyno;
phytype <<= 16;
phytype |=
mii_send(mk_mii_read(phyno, MII_PHYSID2));
#ifdef ET_DEBUG
printf("PHY @ 0x%x pass %d\n", phyno, pass);
#endif
for (i = 0; (i < ARRAY_SIZE(phyinfo))
&& (phyinfo[i].phyid != 0); i++) {
if (phyinfo[i].phyid == phytype) {
#ifdef ET_DEBUG
printf("phyid %x - %s\n",
phyinfo[i].phyid,
phyinfo[i].strid);
#endif
strcpy(info->phy_name, phyinfo[i].strid);
info->phyname_init = 1;
found = 1;
break;
}
}
if (!found) {
#ifdef ET_DEBUG
printf("0x%08x\n", phytype);
#endif
strcpy(info->phy_name, "unknown");
info->phyname_init = 1;
break;
}
}
}
if (phyaddr < 0)
printf("No PHY device found.\n");
return phyaddr;
}
#endif /* CONFIG_SYS_DISCOVER_PHY */
__weak void mii_init(void)
{
struct udevice *dev;
fec_info_t *info;
volatile FEC_T *fecp;
int miispd = 0, i = 0;
u16 status = 0;
u16 linkgood = 0;
/* retrieve from register structure */
dev = eth_get_dev();
info = dev_get_priv(dev);
fecp = (FEC_T *) info->miibase;
fecpin_setclear(info, 1);
mii_reset(info);
/* We use strictly polling mode only */
fecp->eimr = 0;
/* Clear any pending interrupt */
fecp->eir = 0xffffffff;
/* Set MII speed */
miispd = (gd->bus_clk / 1000000) / 5;
fecp->mscr = miispd << 1;
#ifdef CONFIG_SYS_DISCOVER_PHY
info->phy_addr = mii_discover_phy(info);
#endif
if (info->phy_addr == -1)
return;
while (i < info->to_loop) {
status = 0;
i++;
/* Read PHY control register */
miiphy_read(dev->name, info->phy_addr, MII_BMCR, &status);
/* If phy set to autonegotiate, wait for autonegotiation done,
* if phy is not autonegotiating, just wait for link up.
*/
if ((status & BMCR_ANENABLE) == BMCR_ANENABLE) {
linkgood = (BMSR_ANEGCOMPLETE | BMSR_LSTATUS);
} else {
linkgood = BMSR_LSTATUS;
}
/* Read PHY status register */
miiphy_read(dev->name, info->phy_addr, MII_BMSR, &status);
if ((status & linkgood) == linkgood)
break;
udelay(1);
}
if (i >= info->to_loop)
printf("Link UP timeout\n");
/* adapt to the duplex and speed settings of the phy */
info->dup_spd = miiphy_duplex(dev->name, info->phy_addr) << 16;
info->dup_spd |= miiphy_speed(dev->name, info->phy_addr);
}
/*
* Read and write a MII PHY register, routines used by MII Utilities
*
* FIXME: These routines are expected to return 0 on success, but mii_send
* does _not_ return an error code. Maybe 0xFFFF means error, i.e.
* no PHY connected...
* For now always return 0.
* FIXME: These routines only work after calling eth_init() at least once!
* Otherwise they hang in mii_send() !!! Sorry!
*/
int mcffec_miiphy_read(struct mii_dev *bus, int addr, int devad, int reg)
{
short rdreg; /* register working value */
#ifdef MII_DEBUG
printf("miiphy_read(0x%x) @ 0x%x = ", reg, addr);
#endif
rdreg = mii_send(mk_mii_read(addr, reg));
#ifdef MII_DEBUG
printf("0x%04x\n", rdreg);
#endif
return rdreg;
}
int mcffec_miiphy_write(struct mii_dev *bus, int addr, int devad, int reg,
u16 value)
{
#ifdef MII_DEBUG
printf("miiphy_write(0x%x) @ 0x%x = 0x%04x\n", reg, addr, value);
#endif
mii_send(mk_mii_write(addr, reg, value));
return 0;
}
#endif /* CONFIG_CMD_NET */
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