ColdFire: Add mii driver in drivers/net

All CF platforms' mii.c are consolidated into one

Signed-off-by: TsiChung Liew <Tsi-Chung.Liew@freescale.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

1 files changed, 321 insertions, 0 deletions

diff --git a/drivers/net/mcfmii.c b/drivers/net/mcfmii.c
new file mode 100644
index 0000000..2b733c6
--- /dev/null
+++ b/drivers/net/mcfmii.c
@@ -0,0 +1,321 @@
+/*
+ * Copyright (C) 2004-2008 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <config.h>
+#include <net.h>
+#include <netdev.h>
+
+#ifdef CONFIG_MCF547x_8x
+#include <asm/fsl_mcdmafec.h>
+#else
+#include <asm/fec.h>
+#endif
+#include <asm/immap.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI)
+#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 CONFIG_SYS_UNSPEC_PHYID
+#	define CONFIG_SYS_UNSPEC_PHYID		0
+#endif
+#ifndef CONFIG_SYS_UNSPEC_STRID
+#	define CONFIG_SYS_UNSPEC_STRID		0
+#endif
+
+#ifdef CONFIG_MCF547x_8x
+typedef struct fec_info_dma FEC_INFO_T;
+#define FEC_T fecdma_t
+#else
+typedef struct fec_info_s FEC_INFO_T;
+#define FEC_T fec_t
+#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(CONFIG_SYS_UNSPEC_PHYID) && defined(CONFIG_SYS_UNSPEC_STRID)
+	{CONFIG_SYS_UNSPEC_PHYID, CONFIG_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)
+{
+	FEC_INFO_T *info;
+	volatile FEC_T *ep;
+	struct eth_device *dev;
+	uint mii_reply;
+	int j = 0;
+
+	/* retrieve from register structure */
+	dev = eth_get_dev();
+	info = dev->priv;
+
+	ep = (FEC_T *) info->miibase;
+
+	ep->mmfr = mii_cmd;	/* command to phy */
+
+	/* wait for mii complete */
+	while (!(ep->eir & FEC_EIR_MII) && (j < MCFFEC_TOUT_LOOP)) {
+		udelay(1);
+		j++;
+	}
+	if (j >= MCFFEC_TOUT_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(struct eth_device *dev)
+{
+#define MAX_PHY_PASSES 11
+	FEC_INFO_T *info = dev->priv;
+	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, PHY_PHYIDR1));
+#ifdef ET_DEBUG
+			printf("PHY type 0x%x pass %d type\n", phytype, pass);
+#endif
+			if (phytype != 0xffff) {
+				phyaddr = phyno;
+				phytype <<= 16;
+				phytype |=
+				    mii_send(mk_mii_read(phyno, PHY_PHYIDR2));
+
+#ifdef ET_DEBUG
+				printf("PHY @ 0x%x pass %d\n", phyno, pass);
+#endif
+
+				for (i = 0; i < (sizeof(phyinfo) / sizeof(phy_info_t)); 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 */
+
+void mii_init(void) __attribute__((weak,alias("__mii_init")));
+
+void __mii_init(void)
+{
+	FEC_INFO_T *info;
+	volatile FEC_T *fecp;
+	struct eth_device *dev;
+	int miispd = 0, i = 0;
+	u16 autoneg = 0;
+
+	/* retrieve from register structure */
+	dev = eth_get_dev();
+	info = dev->priv;
+
+	fecp = (FEC_T *) info->miibase;
+
+	fecpin_setclear(dev, 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;
+
+	info->phy_addr = mii_discover_phy(dev);
+
+#define AUTONEGLINK		(PHY_BMSR_AUTN_COMP | PHY_BMSR_LS)
+	while (i < MCFFEC_TOUT_LOOP) {
+		autoneg = 0;
+		miiphy_read(dev->name, info->phy_addr, PHY_BMSR, &autoneg);
+		i++;
+
+		if ((autoneg & AUTONEGLINK) == AUTONEGLINK)
+			break;
+
+		udelay(500);
+	}
+	if (i >= MCFFEC_TOUT_LOOP) {
+		printf("Auto Negotiation not complete\n");
+	}
+
+	/* adapt to the half/full speed settings */
+	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(char *devname, unsigned char addr, unsigned char reg,
+		       unsigned short *value)
+{
+	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));
+
+	*value = rdreg;
+
+#ifdef MII_DEBUG
+	printf("0x%04x\n", *value);
+#endif
+
+	return 0;
+}
+
+int mcffec_miiphy_write(char *devname, unsigned char addr, unsigned char reg,
+			unsigned short value)
+{
+	short rdreg;		/* register working value */
+
+#ifdef MII_DEBUG
+	printf("miiphy_write(0x%x) @ 0x%x = ", reg, addr);
+#endif
+
+	rdreg = mii_send(mk_mii_write(addr, reg, value));
+
+#ifdef MII_DEBUG
+	printf("0x%04x\n", value);
+#endif
+
+	return 0;
+}
+
+#endif				/* CONFIG_CMD_NET, FEC_ENET & NET_MULTI */