Moved Davinci Ethernet driver to drivers/net
This driver has been renamed davinci_emac.c
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index a360a50..575d9d9 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -64,6 +64,7 @@
COBJS-$(CONFIG_DRIVER_SMC91111) += smc91111.o
COBJS-$(CONFIG_DRIVER_SMC911X) += smc911x.o
COBJS-$(CONFIG_TIGON3) += tigon3.o bcm570x_autoneg.o 5701rls.o
+COBJS-$(CONFIG_DRIVER_TI_EMAC) += davinci_emac.o
COBJS-$(CONFIG_TSEC_ENET) += tsec.o
COBJS-$(CONFIG_TSI108_ETH) += tsi108_eth.o
COBJS-$(CONFIG_ULI526X) += uli526x.o
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
new file mode 100644
index 0000000..f6f81df
--- /dev/null
+++ b/drivers/net/davinci_emac.c
@@ -0,0 +1,655 @@
+/*
+ * 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 */