1 // SPDX-License-Identifier: GPL-2.0+
3  * Copyright (C) 2004-2008 Freescale Semiconductor, Inc.
4  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
30 /* Make MII read/write commands for the FEC. */
77  * mii_init -- Initialize the MII for MII command without ethernet
82 	volatile FEC_T *fecp = (FEC_T *) (info->miibase);  in mii_reset()
85 	fecp->ecr = FEC_ECR_RESET;  in mii_reset()
87 	for (i = 0; (fecp->ecr & FEC_ECR_RESET) && (i < FEC_RESET_DELAY); ++i) {  in mii_reset()
94 /* send command to phy using mii, wait for result */
105 	info = dev->priv;  in mii_send()
107 	ep = (FEC_T *) info->miibase;  in mii_send()
109 	ep->mmfr = mii_cmd;	/* command to phy */  in mii_send()
111 	/* wait for mii complete */  in mii_send()
112 	while (!(ep->eir & FEC_EIR_MII) && (j < MCFFEC_TOUT_LOOP)) {  in mii_send()
118 		return -1;  in mii_send()
121 	mii_reply = ep->mmfr;	/* result from phy */  in mii_send()
122 	ep->eir = FEC_EIR_MII;	/* clear MII complete */  in mii_send()
128 	return (mii_reply & 0xffff);	/* data read from phy */  in mii_send()
136 	FEC_INFO_T *info = dev->priv;  in mii_discover_phy()
141 	if (info->phyname_init)  in mii_discover_phy()
142 		return info->phy_addr;  in mii_discover_phy()
144 	phyaddr = -1;		/* didn't find a PHY yet */  in mii_discover_phy()
145 	for (pass = 1; pass <= MAX_PHY_PASSES && phyaddr < 0; ++pass) {  in mii_discover_phy()
147 			/* PHY may need more time to recover from reset.  in mii_discover_phy()
150 			 * With 11 passes this gives it 100ms to wake up.  in mii_discover_phy()
155 		for (phyno = 0; phyno < 32 && phyaddr < 0; ++phyno) {  in mii_discover_phy()
159 			printf("PHY type 0x%x pass %d type\n", phytype, pass);  in mii_discover_phy()
169 			printf("PHY @ 0x%x pass %d\n", phyno, pass);  in mii_discover_phy()
172 			for (i = 0; (i < ARRAY_SIZE(phyinfo))  in mii_discover_phy()
176 					printf("phyid %x - %s\n",  in mii_discover_phy()
180 					strcpy(info->phy_name, phyinfo[i].strid);  in mii_discover_phy()
181 					info->phyname_init = 1;  in mii_discover_phy()
191 				strcpy(info->phy_name, "unknown");  in mii_discover_phy()
192 				info->phyname_init = 1;  in mii_discover_phy()
199 		printf("No PHY device found.\n");  in mii_discover_phy()
218 	info = dev->priv;  in __mii_init()
220 	fecp = (FEC_T *) info->miibase;  in __mii_init()
227 	fecp->eimr = 0;  in __mii_init()
230 	fecp->eir = 0xffffffff;  in __mii_init()
233 	miispd = (gd->bus_clk / 1000000) / 5;  in __mii_init()
234 	fecp->mscr = miispd << 1;  in __mii_init()
236 	info->phy_addr = mii_discover_phy(dev);  in __mii_init()
241 		/* Read PHY control register */  in __mii_init()
242 		miiphy_read(dev->name, info->phy_addr, MII_BMCR, &status);  in __mii_init()
244 		/* If phy set to autonegotiate, wait for autonegotiation done,  in __mii_init()
245 		 * if phy is not autonegotiating, just wait for link up.  in __mii_init()
252 		/* Read PHY status register */  in __mii_init()
253 		miiphy_read(dev->name, info->phy_addr, MII_BMSR, &status);  in __mii_init()
263 	/* adapt to the duplex and speed settings of the phy */  in __mii_init()
264 	info->dup_spd = miiphy_duplex(dev->name, info->phy_addr) << 16;  in __mii_init()
265 	info->dup_spd |= miiphy_speed(dev->name, info->phy_addr);  in __mii_init()
269  * Read and write a MII PHY register, routines used by MII Utilities
273  *	  no PHY connected...
274  *	  For now always return 0.