Moved Davinci Ethernet driver to drivers/net

This driver has been renamed davinci_emac.c

Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

2 files changed, 1 insertions, 656 deletions

diff --git a/cpu/arm926ejs/davinci/Makefile b/cpu/arm926ejs/davinci/Makefile
index 6eaa89c..e45ad25 100644
--- a/cpu/arm926ejs/davinci/Makefile
+++ b/cpu/arm926ejs/davinci/Makefile
@@ -30,7 +30,7 @@ LIB	= $(obj)lib$(SOC).a
 COBJS-y				+= cpu.o timer.o psc.o
 COBJS-$(CONFIG_SOC_DM355)	+= dm355.o
 COBJS-$(CONFIG_SOC_DM644X)	+= dm644x.o
-COBJS-$(CONFIG_DRIVER_TI_EMAC)	+= ether.o lxt972.o dp83848.o
+COBJS-$(CONFIG_DRIVER_TI_EMAC)	+= lxt972.o dp83848.o
 
 SOBJS	= reset.o
 
diff --git a/cpu/arm926ejs/davinci/ether.c b/cpu/arm926ejs/davinci/ether.c
deleted file mode 100644
index f6f81df..0000000
--- a/cpu/arm926ejs/davinci/ether.c
+++ /dev/null
@@ -1,655 +0,0 @@
-/*
- * Ethernet driver for TI TMS320DM644x (DaVinci) chips.
- *
- * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
- *
- * Parts shamelessly stolen from TI's dm644x_emac.c. Original copyright
- * follows:
- *
- * ----------------------------------------------------------------------------
- *
- * dm644x_emac.c
- *
- * TI DaVinci (DM644X) EMAC peripheral driver source for DV-EVM
- *
- * Copyright (C) 2005 Texas Instruments.
- *
- * ----------------------------------------------------------------------------
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- * ----------------------------------------------------------------------------
-
- * Modifications:
- * ver. 1.0: Sep 2005, Anant Gole - Created EMAC version for uBoot.
- * ver  1.1: Nov 2005, Anant Gole - Extended the RX logic for multiple descriptors
- *
- */
-#include <common.h>
-#include <command.h>
-#include <net.h>
-#include <miiphy.h>
-#include <asm/arch/emac_defs.h>
-
-#ifdef CONFIG_DRIVER_TI_EMAC
-
-#ifdef CONFIG_CMD_NET
-
-unsigned int	emac_dbg = 0;
-#define debug_emac(fmt,args...)	if (emac_dbg) printf(fmt,##args)
-
-/* Internal static functions */
-static int davinci_eth_hw_init (void);
-static int davinci_eth_open (void);
-static int davinci_eth_close (void);
-static int davinci_eth_send_packet (volatile void *packet, int length);
-static int davinci_eth_rcv_packet (void);
-static void davinci_eth_mdio_enable(void);
-
-static int gen_init_phy(int phy_addr);
-static int gen_is_phy_connected(int phy_addr);
-static int gen_get_link_speed(int phy_addr);
-static int gen_auto_negotiate(int phy_addr);
-
-/* Wrappers exported to the U-Boot proper */
-int eth_hw_init(void)
-{
-	return(davinci_eth_hw_init());
-}
-
-int eth_init(bd_t * bd)
-{
-	return(davinci_eth_open());
-}
-
-void eth_halt(void)
-{
-	davinci_eth_close();
-}
-
-int eth_send(volatile void *packet, int length)
-{
-	return(davinci_eth_send_packet(packet, length));
-}
-
-int eth_rx(void)
-{
-	return(davinci_eth_rcv_packet());
-}
-
-void eth_mdio_enable(void)
-{
-	davinci_eth_mdio_enable();
-}
-/* End of wrappers */
-
-
-static u_int8_t davinci_eth_mac_addr[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
-
-/*
- * This function must be called before emac_open() if you want to override
- * the default mac address.
- */
-void davinci_eth_set_mac_addr(const u_int8_t *addr)
-{
-	int i;
-
-	for (i = 0; i < sizeof (davinci_eth_mac_addr); i++) {
-		davinci_eth_mac_addr[i] = addr[i];
-	}
-}
-
-/* EMAC Addresses */
-static volatile emac_regs	*adap_emac = (emac_regs *)EMAC_BASE_ADDR;
-static volatile ewrap_regs	*adap_ewrap = (ewrap_regs *)EMAC_WRAPPER_BASE_ADDR;
-static volatile mdio_regs	*adap_mdio = (mdio_regs *)EMAC_MDIO_BASE_ADDR;
-
-/* EMAC descriptors */
-static volatile emac_desc	*emac_rx_desc = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_RX_DESC_BASE);
-static volatile emac_desc	*emac_tx_desc = (emac_desc *)(EMAC_WRAPPER_RAM_ADDR + EMAC_TX_DESC_BASE);
-static volatile emac_desc	*emac_rx_active_head = 0;
-static volatile emac_desc	*emac_rx_active_tail = 0;
-static int			emac_rx_queue_active = 0;
-
-/* Receive packet buffers */
-static unsigned char		emac_rx_buffers[EMAC_MAX_RX_BUFFERS * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN)];
-
-/* PHY address for a discovered PHY (0xff - not found) */
-static volatile u_int8_t	active_phy_addr = 0xff;
-
-phy_t				phy;
-
-static void davinci_eth_mdio_enable(void)
-{
-	u_int32_t	clkdiv;
-
-	clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
-
-	adap_mdio->CONTROL = (clkdiv & 0xff) |
-		MDIO_CONTROL_ENABLE |
-		MDIO_CONTROL_FAULT |
-		MDIO_CONTROL_FAULT_ENABLE;
-
-	while (adap_mdio->CONTROL & MDIO_CONTROL_IDLE) {;}
-}
-
-/*
- * Tries to find an active connected PHY. Returns 1 if address if found.
- * If no active PHY (or more than one PHY) found returns 0.
- * Sets active_phy_addr variable.
- */
-static int davinci_eth_phy_detect(void)
-{
-	u_int32_t	phy_act_state;
-	int		i;
-
-	active_phy_addr = 0xff;
-
-	if ((phy_act_state = adap_mdio->ALIVE) == 0)
-		return(0);				/* No active PHYs */
-
-	debug_emac("davinci_eth_phy_detect(), ALIVE = 0x%08x\n", phy_act_state);
-
-	for (i = 0; i < 32; i++) {
-		if (phy_act_state & (1 << i)) {
-			if (phy_act_state & ~(1 << i))
-				return(0);		/* More than one PHY */
-			else {
-				active_phy_addr = i;
-				return(1);
-			}
-		}
-	}
-
-	return(0);	/* Just to make GCC happy */
-}
-
-
-/* Read a PHY register via MDIO inteface. Returns 1 on success, 0 otherwise */
-int davinci_eth_phy_read(u_int8_t phy_addr, u_int8_t reg_num, u_int16_t *data)
-{
-	int	tmp;
-
-	while (adap_mdio->USERACCESS0 & MDIO_USERACCESS0_GO) {;}
-
-	adap_mdio->USERACCESS0 = MDIO_USERACCESS0_GO |
-				MDIO_USERACCESS0_WRITE_READ |
-				((reg_num & 0x1f) << 21) |
-				((phy_addr & 0x1f) << 16);
-
-	/* Wait for command to complete */
-	while ((tmp = adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO) {;}
-
-	if (tmp & MDIO_USERACCESS0_ACK) {
-		*data = tmp & 0xffff;
-		return(1);
-	}
-
-	*data = -1;
-	return(0);
-}
-
-/* Write to a PHY register via MDIO inteface. Blocks until operation is complete. */
-int davinci_eth_phy_write(u_int8_t phy_addr, u_int8_t reg_num, u_int16_t data)
-{
-
-	while (adap_mdio->USERACCESS0 & MDIO_USERACCESS0_GO) {;}
-
-	adap_mdio->USERACCESS0 = MDIO_USERACCESS0_GO |
-				MDIO_USERACCESS0_WRITE_WRITE |
-				((reg_num & 0x1f) << 21) |
-				((phy_addr & 0x1f) << 16) |
-				(data & 0xffff);
-
-	/* Wait for command to complete */
-	while (adap_mdio->USERACCESS0 & MDIO_USERACCESS0_GO) {;}
-
-	return(1);
-}
-
-/* PHY functions for a generic PHY */
-static int gen_init_phy(int phy_addr)
-{
-	int	ret = 1;
-
-	if (gen_get_link_speed(phy_addr)) {
-		/* Try another time */
-		ret = gen_get_link_speed(phy_addr);
-	}
-
-	return(ret);
-}
-
-static int gen_is_phy_connected(int phy_addr)
-{
-	u_int16_t	dummy;
-
-	return(davinci_eth_phy_read(phy_addr, PHY_PHYIDR1, &dummy));
-}
-
-static int gen_get_link_speed(int phy_addr)
-{
-	u_int16_t	tmp;
-
-	if (davinci_eth_phy_read(phy_addr, MII_STATUS_REG, &tmp) && (tmp & 0x04))
-		return(1);
-
-	return(0);
-}
-
-static int gen_auto_negotiate(int phy_addr)
-{
-	u_int16_t	tmp;
-
-	if (!davinci_eth_phy_read(phy_addr, PHY_BMCR, &tmp))
-		return(0);
-
-	/* Restart Auto_negotiation  */
-	tmp |= PHY_BMCR_AUTON;
-	davinci_eth_phy_write(phy_addr, PHY_BMCR, tmp);
-
-	/*check AutoNegotiate complete */
-	udelay (10000);
-	if (!davinci_eth_phy_read(phy_addr, PHY_BMSR, &tmp))
-		return(0);
-
-	if (!(tmp & PHY_BMSR_AUTN_COMP))
-		return(0);
-
-	return(gen_get_link_speed(phy_addr));
-}
-/* End of generic PHY functions */
-
-
-#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
-static int davinci_mii_phy_read(char *devname, unsigned char addr, unsigned char reg, unsigned short *value)
-{
-	return(davinci_eth_phy_read(addr, reg, value) ? 0 : 1);
-}
-
-static int davinci_mii_phy_write(char *devname, unsigned char addr, unsigned char reg, unsigned short value)
-{
-	return(davinci_eth_phy_write(addr, reg, value) ? 0 : 1);
-}
-
-int davinci_eth_miiphy_initialize(bd_t *bis)
-{
-	miiphy_register(phy.name, davinci_mii_phy_read, davinci_mii_phy_write);
-
-	return(1);
-}
-#endif
-
-/*
- * This function initializes the emac hardware. It does NOT initialize
- * EMAC modules power or pin multiplexors, that is done by board_init()
- * much earlier in bootup process. Returns 1 on success, 0 otherwise.
- */
-static int davinci_eth_hw_init(void)
-{
-	u_int32_t	phy_id;
-	u_int16_t	tmp;
-	int		i;
-
-	davinci_eth_mdio_enable();
-
-	for (i = 0; i < 256; i++) {
-		if (adap_mdio->ALIVE)
-			break;
-		udelay(10);
-	}
-
-	if (i >= 256) {
-		printf("No ETH PHY detected!!!\n");
-		return(0);
-	}
-
-	/* Find if a PHY is connected and get it's address */
-	if (!davinci_eth_phy_detect())
-		return(0);
-
-	/* Get PHY ID and initialize phy_ops for a detected PHY */
-	if (!davinci_eth_phy_read(active_phy_addr, PHY_PHYIDR1, &tmp)) {
-		active_phy_addr = 0xff;
-		return(0);
-	}
-
-	phy_id = (tmp << 16) & 0xffff0000;
-
-	if (!davinci_eth_phy_read(active_phy_addr, PHY_PHYIDR2, &tmp)) {
-		active_phy_addr = 0xff;
-		return(0);
-	}
-
-	phy_id |= tmp & 0x0000ffff;
-
-	switch (phy_id) {
-		case PHY_LXT972:
-			sprintf(phy.name, "LXT972 @ 0x%02x", active_phy_addr);
-			phy.init = lxt972_init_phy;
-			phy.is_phy_connected = lxt972_is_phy_connected;
-			phy.get_link_speed = lxt972_get_link_speed;
-			phy.auto_negotiate = lxt972_auto_negotiate;
-			break;
-		case PHY_DP83848:
-			sprintf(phy.name, "DP83848 @ 0x%02x", active_phy_addr);
-			phy.init = dp83848_init_phy;
-			phy.is_phy_connected = dp83848_is_phy_connected;
-			phy.get_link_speed = dp83848_get_link_speed;
-			phy.auto_negotiate = dp83848_auto_negotiate;
-			break;
-		default:
-			sprintf(phy.name, "GENERIC @ 0x%02x", active_phy_addr);
-			phy.init = gen_init_phy;
-			phy.is_phy_connected = gen_is_phy_connected;
-			phy.get_link_speed = gen_get_link_speed;
-			phy.auto_negotiate = gen_auto_negotiate;
-	}
-
-	printf("Ethernet PHY: %s\n", phy.name);
-
-	return(1);
-}
-
-
-/* Eth device open */
-static int davinci_eth_open(void)
-{
-	dv_reg_p		addr;
-	u_int32_t		clkdiv, cnt;
-	volatile emac_desc	*rx_desc;
-
-	debug_emac("+ emac_open\n");
-
-	/* Reset EMAC module and disable interrupts in wrapper */
-	adap_emac->SOFTRESET = 1;
-	while (adap_emac->SOFTRESET != 0) {;}
-	adap_ewrap->EWCTL = 0;
-	for (cnt = 0; cnt < 5; cnt++) {
-		clkdiv = adap_ewrap->EWCTL;
-	}
-
-	rx_desc = emac_rx_desc;
-
-	adap_emac->TXCONTROL = 0x01;
-	adap_emac->RXCONTROL = 0x01;
-
-	/* Set MAC Addresses & Init multicast Hash to 0 (disable any multicast receive) */
-	/* Using channel 0 only - other channels are disabled */
-	adap_emac->MACINDEX = 0;
-	adap_emac->MACADDRHI =
-		(davinci_eth_mac_addr[3] << 24) |
-		(davinci_eth_mac_addr[2] << 16) |
-		(davinci_eth_mac_addr[1] << 8)  |
-		(davinci_eth_mac_addr[0]);
-	adap_emac->MACADDRLO =
-		(davinci_eth_mac_addr[5] << 8) |
-		(davinci_eth_mac_addr[4]);
-
-	adap_emac->MACHASH1 = 0;
-	adap_emac->MACHASH2 = 0;
-
-	/* Set source MAC address - REQUIRED */
-	adap_emac->MACSRCADDRHI =
-		(davinci_eth_mac_addr[3] << 24) |
-		(davinci_eth_mac_addr[2] << 16) |
-		(davinci_eth_mac_addr[1] << 8)  |
-		(davinci_eth_mac_addr[0]);
-	adap_emac->MACSRCADDRLO =
-		(davinci_eth_mac_addr[4] << 8) |
-		(davinci_eth_mac_addr[5]);
-
-	/* Set DMA 8 TX / 8 RX Head pointers to 0 */
-	addr = &adap_emac->TX0HDP;
-	for(cnt = 0; cnt < 16; cnt++)
-		*addr++ = 0;
-
-	addr = &adap_emac->RX0HDP;
-	for(cnt = 0; cnt < 16; cnt++)
-		*addr++ = 0;
-
-	/* Clear Statistics (do this before setting MacControl register) */
-	addr = &adap_emac->RXGOODFRAMES;
-	for(cnt = 0; cnt < EMAC_NUM_STATS; cnt++)
-		*addr++ = 0;
-
-	/* No multicast addressing */
-	adap_emac->MACHASH1 = 0;
-	adap_emac->MACHASH2 = 0;
-
-	/* Create RX queue and set receive process in place */
-	emac_rx_active_head = emac_rx_desc;
-	for (cnt = 0; cnt < EMAC_MAX_RX_BUFFERS; cnt++) {
-		rx_desc->next = (u_int32_t)(rx_desc + 1);
-		rx_desc->buffer = &emac_rx_buffers[cnt * (EMAC_MAX_ETHERNET_PKT_SIZE + EMAC_PKT_ALIGN)];
-		rx_desc->buff_off_len = EMAC_MAX_ETHERNET_PKT_SIZE;
-		rx_desc->pkt_flag_len = EMAC_CPPI_OWNERSHIP_BIT;
-		rx_desc++;
-	}
-
-	/* Set the last descriptor's "next" parameter to 0 to end the RX desc list */
-	rx_desc--;
-	rx_desc->next = 0;
-	emac_rx_active_tail = rx_desc;
-	emac_rx_queue_active = 1;
-
-	/* Enable TX/RX */
-	adap_emac->RXMAXLEN = EMAC_MAX_ETHERNET_PKT_SIZE;
-	adap_emac->RXBUFFEROFFSET = 0;
-
-	/* No fancy configs - Use this for promiscous for debug - EMAC_RXMBPENABLE_RXCAFEN_ENABLE */
-	adap_emac->RXMBPENABLE = EMAC_RXMBPENABLE_RXBROADEN;
-
-	/* Enable ch 0 only */
-	adap_emac->RXUNICASTSET = 0x01;
-
-	/* Enable MII interface and Full duplex mode */
-	adap_emac->MACCONTROL = (EMAC_MACCONTROL_MIIEN_ENABLE | EMAC_MACCONTROL_FULLDUPLEX_ENABLE);
-
-	/* Init MDIO & get link state */
-	clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
-	adap_mdio->CONTROL = ((clkdiv & 0xff) | MDIO_CONTROL_ENABLE | MDIO_CONTROL_FAULT);
-
-	if (!phy.get_link_speed(active_phy_addr))
-		return(0);
-
-	/* Start receive process */
-	adap_emac->RX0HDP = (u_int32_t)emac_rx_desc;
-
-	debug_emac("- emac_open\n");
-
-	return(1);
-}
-
-/* EMAC Channel Teardown */
-static void davinci_eth_ch_teardown(int ch)
-{
-	dv_reg		dly = 0xff;
-	dv_reg		cnt;
-
-	debug_emac("+ emac_ch_teardown\n");
-
-	if (ch == EMAC_CH_TX) {
-		/* Init TX channel teardown */
-		adap_emac->TXTEARDOWN = 1;
-		for(cnt = 0; cnt != 0xfffffffc; cnt = adap_emac->TX0CP) {
-			/* Wait here for Tx teardown completion interrupt to occur
-			 * Note: A task delay can be called here to pend rather than
-			 * occupying CPU cycles - anyway it has been found that teardown
-			 * takes very few cpu cycles and does not affect functionality */
-			 dly--;
-			 udelay(1);
-			 if (dly == 0)
-				break;
-		}
-		adap_emac->TX0CP = cnt;
-		adap_emac->TX0HDP = 0;
-	} else {
-		/* Init RX channel teardown */
-		adap_emac->RXTEARDOWN = 1;
-		for(cnt = 0; cnt != 0xfffffffc; cnt = adap_emac->RX0CP) {
-			/* Wait here for Rx teardown completion interrupt to occur
-			 * Note: A task delay can be called here to pend rather than
-			 * occupying CPU cycles - anyway it has been found that teardown
-			 * takes very few cpu cycles and does not affect functionality */
-			 dly--;
-			 udelay(1);
-			 if (dly == 0)
-				break;
-		}
-		adap_emac->RX0CP = cnt;
-		adap_emac->RX0HDP = 0;
-	}
-
-	debug_emac("- emac_ch_teardown\n");
-}
-
-/* Eth device close */
-static int davinci_eth_close(void)
-{
-	debug_emac("+ emac_close\n");
-
-	davinci_eth_ch_teardown(EMAC_CH_TX);	/* TX Channel teardown */
-	davinci_eth_ch_teardown(EMAC_CH_RX);	/* RX Channel teardown */
-
-	/* Reset EMAC module and disable interrupts in wrapper */
-	adap_emac->SOFTRESET = 1;
-	adap_ewrap->EWCTL = 0;
-
-	debug_emac("- emac_close\n");
-	return(1);
-}
-
-static int tx_send_loop = 0;
-
-/*
- * This function sends a single packet on the network and returns
- * positive number (number of bytes transmitted) or negative for error
- */
-static int davinci_eth_send_packet (volatile void *packet, int length)
-{
-	int ret_status = -1;
-
-	tx_send_loop = 0;
-
-	/* Return error if no link */
-	if (!phy.get_link_speed (active_phy_addr)) {
-		printf ("WARN: emac_send_packet: No link\n");
-		return (ret_status);
-	}
-
-	/* Check packet size and if < EMAC_MIN_ETHERNET_PKT_SIZE, pad it up */
-	if (length < EMAC_MIN_ETHERNET_PKT_SIZE) {
-		length = EMAC_MIN_ETHERNET_PKT_SIZE;
-	}
-
-	/* Populate the TX descriptor */
-	emac_tx_desc->next = 0;
-	emac_tx_desc->buffer = (u_int8_t *) packet;
-	emac_tx_desc->buff_off_len = (length & 0xffff);
-	emac_tx_desc->pkt_flag_len = ((length & 0xffff) |
-				      EMAC_CPPI_SOP_BIT |
-				      EMAC_CPPI_OWNERSHIP_BIT |
-				      EMAC_CPPI_EOP_BIT);
-	/* Send the packet */
-	adap_emac->TX0HDP = (unsigned int) emac_tx_desc;
-
-	/* Wait for packet to complete or link down */
-	while (1) {
-		if (!phy.get_link_speed (active_phy_addr)) {
-			davinci_eth_ch_teardown (EMAC_CH_TX);
-			return (ret_status);
-		}
-		if (adap_emac->TXINTSTATRAW & 0x01) {
-			ret_status = length;
-			break;
-		}
-		tx_send_loop++;
-	}
-
-	return (ret_status);
-}
-
-/*
- * This function handles receipt of a packet from the network
- */
-static int davinci_eth_rcv_packet (void)
-{
-	volatile emac_desc *rx_curr_desc;
-	volatile emac_desc *curr_desc;
-	volatile emac_desc *tail_desc;
-	int status, ret = -1;
-
-	rx_curr_desc = emac_rx_active_head;
-	status = rx_curr_desc->pkt_flag_len;
-	if ((rx_curr_desc) && ((status & EMAC_CPPI_OWNERSHIP_BIT) == 0)) {
-		if (status & EMAC_CPPI_RX_ERROR_FRAME) {
-			/* Error in packet - discard it and requeue desc */
-			printf ("WARN: emac_rcv_pkt: Error in packet\n");
-		} else {
-			NetReceive (rx_curr_desc->buffer,
-				    (rx_curr_desc->buff_off_len & 0xffff));
-			ret = rx_curr_desc->buff_off_len & 0xffff;
-		}
-
-		/* Ack received packet descriptor */
-		adap_emac->RX0CP = (unsigned int) rx_curr_desc;
-		curr_desc = rx_curr_desc;
-		emac_rx_active_head =
-			(volatile emac_desc *) rx_curr_desc->next;
-
-		if (status & EMAC_CPPI_EOQ_BIT) {
-			if (emac_rx_active_head) {
-				adap_emac->RX0HDP =
-					(unsigned int) emac_rx_active_head;
-			} else {
-				emac_rx_queue_active = 0;
-				printf ("INFO:emac_rcv_packet: RX Queue not active\n");
-			}
-		}
-
-		/* Recycle RX descriptor */
-		rx_curr_desc->buff_off_len = EMAC_MAX_ETHERNET_PKT_SIZE;
-		rx_curr_desc->pkt_flag_len = EMAC_CPPI_OWNERSHIP_BIT;
-		rx_curr_desc->next = 0;
-
-		if (emac_rx_active_head == 0) {
-			printf ("INFO: emac_rcv_pkt: active queue head = 0\n");
-			emac_rx_active_head = curr_desc;
-			emac_rx_active_tail = curr_desc;
-			if (emac_rx_queue_active != 0) {
-				adap_emac->RX0HDP =
-					(unsigned int) emac_rx_active_head;
-				printf ("INFO: emac_rcv_pkt: active queue head = 0, HDP fired\n");
-				emac_rx_queue_active = 1;
-			}
-		} else {
-			tail_desc = emac_rx_active_tail;
-			emac_rx_active_tail = curr_desc;
-			tail_desc->next = (unsigned int) curr_desc;
-			status = tail_desc->pkt_flag_len;
-			if (status & EMAC_CPPI_EOQ_BIT) {
-				adap_emac->RX0HDP = (unsigned int) curr_desc;
-				status &= ~EMAC_CPPI_EOQ_BIT;
-				tail_desc->pkt_flag_len = status;
-			}
-		}
-		return (ret);
-	}
-	return (0);
-}
-
-#endif /* CONFIG_CMD_NET */
-
-#endif /* CONFIG_DRIVER_TI_EMAC */