--- /dev/null
+/*
+ * (C) Copyright 2011
+ * eInfochips Ltd. <www.einfochips.com>
+ * Written-by: Ajay Bhargav <ajay.bhargav@einfochips.com>
+ *
+ * (C) Copyright 2010
+ * Marvell Semiconductor <www.marvell.com>
+ * Contributor: Mahavir Jain <mjain@marvell.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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <common.h>
+#include <net.h>
+#include <malloc.h>
+#include <miiphy.h>
+#include <netdev.h>
+#include <asm/types.h>
+#include <asm/byteorder.h>
+#include <linux/err.h>
+#include <linux/mii.h>
+#include <asm/io.h>
+#include <asm/arch/armada100.h>
+#include "armada100_fec.h"
+
+#define PHY_ADR_REQ 0xFF /* Magic number to read/write PHY address */
+
+#ifdef DEBUG
+static int eth_dump_regs(struct eth_device *dev)
+{
+ struct armdfec_device *darmdfec = to_darmdfec(dev);
+ struct armdfec_reg *regs = darmdfec->regs;
+ unsigned int i = 0;
+
+ printf("\noffset: phy_adr, value: 0x%x\n", readl(®s->phyadr));
+ printf("offset: smi, value: 0x%x\n", readl(®s->smi));
+ for (i = 0x400; i <= 0x4e4; i += 4)
+ printf("offset: 0x%x, value: 0x%x\n",
+ i, readl(ARMD1_FEC_BASE + i));
+ return 0;
+}
+#endif
+
+static int armdfec_phy_timeout(u32 *reg, u32 flag, int cond)
+{
+ u32 timeout = PHY_WAIT_ITERATIONS;
+ u32 reg_val;
+
+ while (--timeout) {
+ reg_val = readl(reg);
+ if (cond && (reg_val & flag))
+ break;
+ else if (!cond && !(reg_val & flag))
+ break;
+ udelay(PHY_WAIT_MICRO_SECONDS);
+ }
+ return !timeout;
+}
+
+static int smi_reg_read(const char *devname, u8 phy_addr, u8 phy_reg,
+ u16 *value)
+{
+ struct eth_device *dev = eth_get_dev_by_name(devname);
+ struct armdfec_device *darmdfec = to_darmdfec(dev);
+ struct armdfec_reg *regs = darmdfec->regs;
+ u32 val;
+
+ if (phy_addr == PHY_ADR_REQ && phy_reg == PHY_ADR_REQ) {
+ val = readl(®s->phyadr);
+ *value = val & 0x1f;
+ return 0;
+ }
+
+ /* check parameters */
+ if (phy_addr > PHY_MASK) {
+ printf("ARMD100 FEC: (%s) Invalid phy address: 0x%X\n",
+ __func__, phy_addr);
+ return -EINVAL;
+ }
+ if (phy_reg > PHY_MASK) {
+ printf("ARMD100 FEC: (%s) Invalid register offset: 0x%X\n",
+ __func__, phy_reg);
+ return -EINVAL;
+ }
+
+ /* wait for the SMI register to become available */
+ if (armdfec_phy_timeout(®s->smi, SMI_BUSY, FALSE)) {
+ printf("ARMD100 FEC: (%s) PHY busy timeout\n", __func__);
+ return -1;
+ }
+
+ writel((phy_addr << 16) | (phy_reg << 21) | SMI_OP_R, ®s->smi);
+
+ /* now wait for the data to be valid */
+ if (armdfec_phy_timeout(®s->smi, SMI_R_VALID, TRUE)) {
+ val = readl(®s->smi);
+ printf("ARMD100 FEC: (%s) PHY Read timeout, val=0x%x\n",
+ __func__, val);
+ return -1;
+ }
+ val = readl(®s->smi);
+ *value = val & 0xffff;
+
+ return 0;
+}
+
+static int smi_reg_write(const char *devname,
+ u8 phy_addr, u8 phy_reg, u16 value)
+{
+ struct eth_device *dev = eth_get_dev_by_name(devname);
+ struct armdfec_device *darmdfec = to_darmdfec(dev);
+ struct armdfec_reg *regs = darmdfec->regs;
+
+ if (phy_addr == PHY_ADR_REQ && phy_reg == PHY_ADR_REQ) {
+ clrsetbits_le32(®s->phyadr, 0x1f, value & 0x1f);
+ return 0;
+ }
+
+ /* check parameters */
+ if (phy_addr > PHY_MASK) {
+ printf("ARMD100 FEC: (%s) Invalid phy address\n", __func__);
+ return -EINVAL;
+ }
+ if (phy_reg > PHY_MASK) {
+ printf("ARMD100 FEC: (%s) Invalid register offset\n", __func__);
+ return -EINVAL;
+ }
+
+ /* wait for the SMI register to become available */
+ if (armdfec_phy_timeout(®s->smi, SMI_BUSY, FALSE)) {
+ printf("ARMD100 FEC: (%s) PHY busy timeout\n", __func__);
+ return -1;
+ }
+
+ writel((phy_addr << 16) | (phy_reg << 21) | SMI_OP_W | (value & 0xffff),
+ ®s->smi);
+ return 0;
+}
+
+/*
+ * Abort any transmit and receive operations and put DMA
+ * in idle state. AT and AR bits are cleared upon entering
+ * in IDLE state. So poll those bits to verify operation.
+ */
+static void abortdma(struct eth_device *dev)
+{
+ struct armdfec_device *darmdfec = to_darmdfec(dev);
+ struct armdfec_reg *regs = darmdfec->regs;
+ int delay;
+ int maxretries = 40;
+ u32 tmp;
+
+ while (--maxretries) {
+ writel(SDMA_CMD_AR | SDMA_CMD_AT, ®s->sdma_cmd);
+ udelay(100);
+
+ delay = 10;
+ while (--delay) {
+ tmp = readl(®s->sdma_cmd);
+ if (!(tmp & (SDMA_CMD_AR | SDMA_CMD_AT)))
+ break;
+ udelay(10);
+ }
+ if (delay)
+ break;
+ }
+
+ if (!maxretries)
+ printf("ARMD100 FEC: (%s) DMA Stuck\n", __func__);
+}
+
+static inline u32 nibble_swapping_32_bit(u32 x)
+{
+ return ((x & 0xf0f0f0f0) >> 4) | ((x & 0x0f0f0f0f) << 4);
+}
+
+static inline u32 nibble_swapping_16_bit(u32 x)
+{
+ return ((x & 0x0000f0f0) >> 4) | ((x & 0x00000f0f) << 4);
+}
+
+static inline u32 flip_4_bits(u32 x)
+{
+ return ((x & 0x01) << 3) | ((x & 0x002) << 1)
+ | ((x & 0x04) >> 1) | ((x & 0x008) >> 3);
+}
+
+/*
+ * This function will calculate the hash function of the address.
+ * depends on the hash mode and hash size.
+ * Inputs
+ * mach - the 2 most significant bytes of the MAC address.
+ * macl - the 4 least significant bytes of the MAC address.
+ * Outputs
+ * return the calculated entry.
+ */
+static u32 hash_function(u32 mach, u32 macl)
+{
+ u32 hashresult;
+ u32 addrh;
+ u32 addrl;
+ u32 addr0;
+ u32 addr1;
+ u32 addr2;
+ u32 addr3;
+ u32 addrhswapped;
+ u32 addrlswapped;
+
+ addrh = nibble_swapping_16_bit(mach);
+ addrl = nibble_swapping_32_bit(macl);
+
+ addrhswapped = flip_4_bits(addrh & 0xf)
+ + ((flip_4_bits((addrh >> 4) & 0xf)) << 4)
+ + ((flip_4_bits((addrh >> 8) & 0xf)) << 8)
+ + ((flip_4_bits((addrh >> 12) & 0xf)) << 12);
+
+ addrlswapped = flip_4_bits(addrl & 0xf)
+ + ((flip_4_bits((addrl >> 4) & 0xf)) << 4)
+ + ((flip_4_bits((addrl >> 8) & 0xf)) << 8)
+ + ((flip_4_bits((addrl >> 12) & 0xf)) << 12)
+ + ((flip_4_bits((addrl >> 16) & 0xf)) << 16)
+ + ((flip_4_bits((addrl >> 20) & 0xf)) << 20)
+ + ((flip_4_bits((addrl >> 24) & 0xf)) << 24)
+ + ((flip_4_bits((addrl >> 28) & 0xf)) << 28);
+
+ addrh = addrhswapped;
+ addrl = addrlswapped;
+
+ addr0 = (addrl >> 2) & 0x03f;
+ addr1 = (addrl & 0x003) | (((addrl >> 8) & 0x7f) << 2);
+ addr2 = (addrl >> 15) & 0x1ff;
+ addr3 = ((addrl >> 24) & 0x0ff) | ((addrh & 1) << 8);
+
+ hashresult = (addr0 << 9) | (addr1 ^ addr2 ^ addr3);
+ hashresult = hashresult & 0x07ff;
+ return hashresult;
+}
+
+/*
+ * This function will add an entry to the address table.
+ * depends on the hash mode and hash size that was initialized.
+ * Inputs
+ * mach - the 2 most significant bytes of the MAC address.
+ * macl - the 4 least significant bytes of the MAC address.
+ * skip - if 1, skip this address.
+ * rd - the RD field in the address table.
+ * Outputs
+ * address table entry is added.
+ * 0 if success.
+ * -ENOSPC if table full
+ */
+static int add_del_hash_entry(struct armdfec_device *darmdfec, u32 mach,
+ u32 macl, u32 rd, u32 skip, int del)
+{
+ struct addr_table_entry_t *entry, *start;
+ u32 newhi;
+ u32 newlo;
+ u32 i;
+
+ newlo = (((mach >> 4) & 0xf) << 15)
+ | (((mach >> 0) & 0xf) << 11)
+ | (((mach >> 12) & 0xf) << 7)
+ | (((mach >> 8) & 0xf) << 3)
+ | (((macl >> 20) & 0x1) << 31)
+ | (((macl >> 16) & 0xf) << 27)
+ | (((macl >> 28) & 0xf) << 23)
+ | (((macl >> 24) & 0xf) << 19)
+ | (skip << HTESKIP) | (rd << HTERDBIT)
+ | HTEVALID;
+
+ newhi = (((macl >> 4) & 0xf) << 15)
+ | (((macl >> 0) & 0xf) << 11)
+ | (((macl >> 12) & 0xf) << 7)
+ | (((macl >> 8) & 0xf) << 3)
+ | (((macl >> 21) & 0x7) << 0);
+
+ /*
+ * Pick the appropriate table, start scanning for free/reusable
+ * entries at the index obtained by hashing the specified MAC address
+ */
+ start = (struct addr_table_entry_t *)(darmdfec->htpr);
+ entry = start + hash_function(mach, macl);
+ for (i = 0; i < HOP_NUMBER; i++) {
+ if (!(entry->lo & HTEVALID)) {
+ break;
+ } else {
+ /* if same address put in same position */
+ if (((entry->lo & 0xfffffff8) == (newlo & 0xfffffff8))
+ && (entry->hi == newhi))
+ break;
+ }
+ if (entry == start + 0x7ff)
+ entry = start;
+ else
+ entry++;
+ }
+
+ if (((entry->lo & 0xfffffff8) != (newlo & 0xfffffff8)) &&
+ (entry->hi != newhi) && del)
+ return 0;
+
+ if (i == HOP_NUMBER) {
+ if (!del) {
+ printf("ARMD100 FEC: (%s) table section is full\n",
+ __func__);
+ return -ENOSPC;
+ } else {
+ return 0;
+ }
+ }
+
+ /*
+ * Update the selected entry
+ */
+ if (del) {
+ entry->hi = 0;
+ entry->lo = 0;
+ } else {
+ entry->hi = newhi;
+ entry->lo = newlo;
+ }
+
+ return 0;
+}
+
+/*
+ * Create an addressTable entry from MAC address info
+ * found in the specifed net_device struct
+ *
+ * Input : pointer to ethernet interface network device structure
+ * Output : N/A
+ */
+static void update_hash_table_mac_address(struct armdfec_device *darmdfec,
+ u8 *oaddr, u8 *addr)
+{
+ u32 mach;
+ u32 macl;
+
+ /* Delete old entry */
+ if (oaddr) {
+ mach = (oaddr[0] << 8) | oaddr[1];
+ macl = (oaddr[2] << 24) | (oaddr[3] << 16) |
+ (oaddr[4] << 8) | oaddr[5];
+ add_del_hash_entry(darmdfec, mach, macl, 1, 0, HASH_DELETE);
+ }
+
+ /* Add new entry */
+ mach = (addr[0] << 8) | addr[1];
+ macl = (addr[2] << 24) | (addr[3] << 16) | (addr[4] << 8) | addr[5];
+ add_del_hash_entry(darmdfec, mach, macl, 1, 0, HASH_ADD);
+}
+
+/* Address Table Initialization */
+static void init_hashtable(struct eth_device *dev)
+{
+ struct armdfec_device *darmdfec = to_darmdfec(dev);
+ struct armdfec_reg *regs = darmdfec->regs;
+ memset(darmdfec->htpr, 0, HASH_ADDR_TABLE_SIZE);
+ writel((u32)darmdfec->htpr, ®s->htpr);
+}
+
+/*
+ * This detects PHY chip from address 0-31 by reading PHY status
+ * registers. PHY chip can be connected at any of this address.
+ */
+static int ethernet_phy_detect(struct eth_device *dev)
+{
+ u32 val;
+ u16 tmp, mii_status;
+ u8 addr;
+
+ for (addr = 0; addr < 32; addr++) {
+ if (miiphy_read(dev->name, addr, MII_BMSR, &mii_status) != 0)
+ /* try next phy */
+ continue;
+
+ /* invalid MII status. More validation required here... */
+ if (mii_status == 0 || mii_status == 0xffff)
+ /* try next phy */
+ continue;
+
+ if (miiphy_read(dev->name, addr, MII_PHYSID1, &tmp) != 0)
+ /* try next phy */
+ continue;
+
+ val = tmp << 16;
+ if (miiphy_read(dev->name, addr, MII_PHYSID2, &tmp) != 0)
+ /* try next phy */
+ continue;
+
+ val |= tmp;
+
+ if ((val & 0xfffffff0) != 0)
+ return addr;
+ }
+ return -1;
+}
+
+static void armdfec_init_rx_desc_ring(struct armdfec_device *darmdfec)
+{
+ struct rx_desc *p_rx_desc;
+ int i;
+
+ /* initialize the Rx descriptors ring */
+ p_rx_desc = darmdfec->p_rxdesc;
+ for (i = 0; i < RINGSZ; i++) {
+ p_rx_desc->cmd_sts = BUF_OWNED_BY_DMA | RX_EN_INT;
+ p_rx_desc->buf_size = PKTSIZE_ALIGN;
+ p_rx_desc->byte_cnt = 0;
+ p_rx_desc->buf_ptr = darmdfec->p_rxbuf + i * PKTSIZE_ALIGN;
+ if (i == (RINGSZ - 1)) {
+ p_rx_desc->nxtdesc_p = darmdfec->p_rxdesc;
+ } else {
+ p_rx_desc->nxtdesc_p = (struct rx_desc *)
+ ((u32)p_rx_desc + ARMDFEC_RXQ_DESC_ALIGNED_SIZE);
+ p_rx_desc = p_rx_desc->nxtdesc_p;
+ }
+ }
+ darmdfec->p_rxdesc_curr = darmdfec->p_rxdesc;
+}
+
+static int armdfec_init(struct eth_device *dev, bd_t *bd)
+{
+ struct armdfec_device *darmdfec = to_darmdfec(dev);
+ struct armdfec_reg *regs = darmdfec->regs;
+ int phy_adr;
+
+ armdfec_init_rx_desc_ring(darmdfec);
+
+ /* Disable interrupts */
+ writel(0, ®s->im);
+ writel(0, ®s->ic);
+ /* Write to ICR to clear interrupts. */
+ writel(0, ®s->iwc);
+
+ /*
+ * Abort any transmit and receive operations and put DMA
+ * in idle state.
+ */
+ abortdma(dev);
+
+ /* Initialize address hash table */
+ init_hashtable(dev);
+
+ /* SDMA configuration */
+ writel(SDCR_BSZ8 | /* Burst size = 32 bytes */
+ SDCR_RIFB | /* Rx interrupt on frame */
+ SDCR_BLMT | /* Little endian transmit */
+ SDCR_BLMR | /* Little endian receive */
+ SDCR_RC_MAX_RETRANS, /* Max retransmit count */
+ ®s->sdma_conf);
+ /* Port Configuration */
+ writel(PCR_HS, ®s->pconf); /* Hash size is 1/2kb */
+
+ /* Set extended port configuration */
+ writel(PCXR_2BSM | /* Two byte suffix aligns IP hdr */
+ PCXR_DSCP_EN | /* Enable DSCP in IP */
+ PCXR_MFL_1536 | /* Set MTU = 1536 */
+ PCXR_FLP | /* do not force link pass */
+ PCXR_TX_HIGH_PRI, /* Transmit - high priority queue */
+ ®s->pconf_ext);
+
+ update_hash_table_mac_address(darmdfec, NULL, dev->enetaddr);
+
+ /* Update TX and RX queue descriptor register */
+ writel((u32)darmdfec->p_txdesc, ®s->txcdp[TXQ]);
+ writel((u32)darmdfec->p_rxdesc, ®s->rxfdp[RXQ]);
+ writel((u32)darmdfec->p_rxdesc_curr, ®s->rxcdp[RXQ]);
+
+ /* Enable Interrupts */
+ writel(ALL_INTS, ®s->im);
+
+ /* Enable Ethernet Port */
+ setbits_le32(®s->pconf, PCR_EN);
+
+ /* Enable RX DMA engine */
+ setbits_le32(®s->sdma_cmd, SDMA_CMD_ERD);
+
+#ifdef DEBUG
+ eth_dump_regs(dev);
+#endif
+
+#if (defined(CONFIG_MII) || defined(CONFIG_CMD_MII))
+
+#if defined(CONFIG_PHY_BASE_ADR)
+ miiphy_write(dev->name, PHY_ADR_REQ, PHY_ADR_REQ, CONFIG_PHY_BASE_ADR);
+#else
+ /* Search phy address from range 0-31 */
+ phy_adr = ethernet_phy_detect(dev);
+ if (phy_adr < 0) {
+ printf("ARMD100 FEC: PHY not detected at address range 0-31\n");
+ return -1;
+ } else {
+ debug("ARMD100 FEC: PHY detected at addr %d\n", phy_adr);
+ miiphy_write(dev->name, PHY_ADR_REQ, PHY_ADR_REQ, phy_adr);
+ }
+#endif
+
+#if defined(CONFIG_SYS_FAULT_ECHO_LINK_DOWN)
+ /* Wait up to 5s for the link status */
+ for (i = 0; i < 5; i++) {
+ u16 phy_adr;
+
+ miiphy_read(dev->name, 0xFF, 0xFF, &phy_adr);
+ /* Return if we get link up */
+ if (miiphy_link(dev->name, phy_adr))
+ return 0;
+ udelay(1000000);
+ }
+
+ printf("ARMD100 FEC: No link on %s\n", dev->name);
+ return -1;
+#endif
+#endif
+ return 0;
+}
+
+static void armdfec_halt(struct eth_device *dev)
+{
+ struct armdfec_device *darmdfec = to_darmdfec(dev);
+ struct armdfec_reg *regs = darmdfec->regs;
+
+ /* Stop RX DMA */
+ clrbits_le32(®s->sdma_cmd, SDMA_CMD_ERD);
+
+ /*
+ * Abort any transmit and receive operations and put DMA
+ * in idle state.
+ */
+ abortdma(dev);
+
+ /* Disable interrupts */
+ writel(0, ®s->im);
+ writel(0, ®s->ic);
+ writel(0, ®s->iwc);
+
+ /* Disable Port */
+ clrbits_le32(®s->pconf, PCR_EN);
+}
+
+static int armdfec_send(struct eth_device *dev, volatile void *dataptr,
+ int datasize)
+{
+ struct armdfec_device *darmdfec = to_darmdfec(dev);
+ struct armdfec_reg *regs = darmdfec->regs;
+ struct tx_desc *p_txdesc = darmdfec->p_txdesc;
+ void *p = (void *)dataptr;
+ int retry = PHY_WAIT_ITERATIONS * PHY_WAIT_MICRO_SECONDS;
+ u32 cmd_sts;
+
+ /* Copy buffer if it's misaligned */
+ if ((u32)dataptr & 0x07) {
+ if (datasize > PKTSIZE_ALIGN) {
+ printf("ARMD100 FEC: Non-aligned data too large (%d)\n",
+ datasize);
+ return -1;
+ }
+ memcpy(darmdfec->p_aligned_txbuf, p, datasize);
+ p = darmdfec->p_aligned_txbuf;
+ }
+
+ p_txdesc->cmd_sts = TX_ZERO_PADDING | TX_GEN_CRC;
+ p_txdesc->cmd_sts |= TX_FIRST_DESC | TX_LAST_DESC;
+ p_txdesc->cmd_sts |= BUF_OWNED_BY_DMA;
+ p_txdesc->cmd_sts |= TX_EN_INT;
+ p_txdesc->buf_ptr = p;
+ p_txdesc->byte_cnt = datasize;
+
+ /* Apply send command using high priority TX queue */
+ writel((u32)p_txdesc, ®s->txcdp[TXQ]);
+ writel(SDMA_CMD_TXDL | SDMA_CMD_TXDH | SDMA_CMD_ERD, ®s->sdma_cmd);
+
+ /*
+ * wait for packet xmit completion
+ */
+ cmd_sts = readl(&p_txdesc->cmd_sts);
+ while (cmd_sts & BUF_OWNED_BY_DMA) {
+ /* return fail if error is detected */
+ if ((cmd_sts & (TX_ERROR | TX_LAST_DESC)) ==
+ (TX_ERROR | TX_LAST_DESC)) {
+ printf("ARMD100 FEC: (%s) in xmit packet\n", __func__);
+ return -1;
+ }
+ cmd_sts = readl(&p_txdesc->cmd_sts);
+ if (!(retry--)) {
+ printf("ARMD100 FEC: (%s) xmit packet timeout!\n",
+ __func__);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static int armdfec_recv(struct eth_device *dev)
+{
+ struct armdfec_device *darmdfec = to_darmdfec(dev);
+ struct rx_desc *p_rxdesc_curr = darmdfec->p_rxdesc_curr;
+ u32 cmd_sts;
+ u32 timeout = 0;
+
+ /* wait untill rx packet available or timeout */
+ do {
+ if (timeout < PHY_WAIT_ITERATIONS * PHY_WAIT_MICRO_SECONDS) {
+ timeout++;
+ } else {
+ debug("ARMD100 FEC: %s time out...\n", __func__);
+ return -1;
+ }
+ } while (readl(&p_rxdesc_curr->cmd_sts) & BUF_OWNED_BY_DMA);
+
+ if (p_rxdesc_curr->byte_cnt != 0) {
+ debug("ARMD100 FEC: %s: Received %d byte Packet @ 0x%x"
+ "(cmd_sts= %08x)\n", __func__,
+ (u32)p_rxdesc_curr->byte_cnt,
+ (u32)p_rxdesc_curr->buf_ptr,
+ (u32)p_rxdesc_curr->cmd_sts);
+ }
+
+ /*
+ * In case received a packet without first/last bits on
+ * OR the error summary bit is on,
+ * the packets needs to be dropeed.
+ */
+ cmd_sts = readl(&p_rxdesc_curr->cmd_sts);
+
+ if ((cmd_sts & (RX_FIRST_DESC | RX_LAST_DESC)) !=
+ (RX_FIRST_DESC | RX_LAST_DESC)) {
+ printf("ARMD100 FEC: (%s) Dropping packet spread on"
+ " multiple descriptors\n", __func__);
+ } else if (cmd_sts & RX_ERROR) {
+ printf("ARMD100 FEC: (%s) Dropping packet with errors\n",
+ __func__);
+ } else {
+ /* !!! call higher layer processing */
+ debug("ARMD100 FEC: (%s) Sending Received packet to"
+ " upper layer (NetReceive)\n", __func__);
+
+ /*
+ * let the upper layer handle the packet, subtract offset
+ * as two dummy bytes are added in received buffer see
+ * PORT_CONFIG_EXT register bit TWO_Byte_Stuff_Mode bit.
+ */
+ NetReceive((p_rxdesc_curr->buf_ptr + RX_BUF_OFFSET),
+ (int)(p_rxdesc_curr->byte_cnt - RX_BUF_OFFSET));
+ }
+ /*
+ * free these descriptors and point next in the ring
+ */
+ p_rxdesc_curr->cmd_sts = BUF_OWNED_BY_DMA | RX_EN_INT;
+ p_rxdesc_curr->buf_size = PKTSIZE_ALIGN;
+ p_rxdesc_curr->byte_cnt = 0;
+
+ writel((u32)p_rxdesc_curr->nxtdesc_p, (u32)&darmdfec->p_rxdesc_curr);
+
+ return 0;
+}
+
+int armada100_fec_register(unsigned long base_addr)
+{
+ struct armdfec_device *darmdfec;
+ struct eth_device *dev;
+
+ darmdfec = malloc(sizeof(struct armdfec_device));
+ if (!darmdfec)
+ goto error;
+
+ memset(darmdfec, 0, sizeof(struct armdfec_device));
+
+ darmdfec->htpr = memalign(8, HASH_ADDR_TABLE_SIZE);
+ if (!darmdfec->htpr)
+ goto error1;
+
+ darmdfec->p_rxdesc = memalign(PKTALIGN,
+ ARMDFEC_RXQ_DESC_ALIGNED_SIZE * RINGSZ + 1);
+
+ if (!darmdfec->p_rxdesc)
+ goto error1;
+
+ darmdfec->p_rxbuf = memalign(PKTALIGN, RINGSZ * PKTSIZE_ALIGN + 1);
+ if (!darmdfec->p_rxbuf)
+ goto error1;
+
+ darmdfec->p_aligned_txbuf = memalign(8, PKTSIZE_ALIGN);
+ if (!darmdfec->p_aligned_txbuf)
+ goto error1;
+
+ darmdfec->p_txdesc = memalign(PKTALIGN, sizeof(struct tx_desc) + 1);
+ if (!darmdfec->p_txdesc)
+ goto error1;
+
+ dev = &darmdfec->dev;
+ /* Assign ARMADA100 Fast Ethernet Controller Base Address */
+ darmdfec->regs = (void *)base_addr;
+
+ /* must be less than NAMESIZE (16) */
+ strcpy(dev->name, "armd-fec0");
+
+ dev->init = armdfec_init;
+ dev->halt = armdfec_halt;
+ dev->send = armdfec_send;
+ dev->recv = armdfec_recv;
+
+ eth_register(dev);
+
+#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
+ miiphy_register(dev->name, smi_reg_read, smi_reg_write);
+#endif
+ return 0;
+
+error1:
+ free(darmdfec->p_aligned_txbuf);
+ free(darmdfec->p_rxbuf);
+ free(darmdfec->p_rxdesc);
+ free(darmdfec->htpr);
+error:
+ free(darmdfec);
+ printf("AMD100 FEC: (%s) Failed to allocate memory\n", __func__);
+ return -1;
+}
--- /dev/null
+/*
+ * (C) Copyright 2011
+ * eInfochips Ltd. <www.einfochips.com>
+ * Written-by: Ajay Bhargav <ajay.bhargav@einfochips.com>
+ *
+ * (C) Copyright 2010
+ * Marvell Semiconductor <www.marvell.com>
+ * Contributor: Mahavir Jain <mjain@marvell.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., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef __ARMADA100_FEC_H__
+#define __ARMADA100_FEC_H__
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+#define PORT_NUM 0x0
+
+/* RX & TX descriptor command */
+#define BUF_OWNED_BY_DMA (1<<31)
+
+/* RX descriptor status */
+#define RX_EN_INT (1<<23)
+#define RX_FIRST_DESC (1<<17)
+#define RX_LAST_DESC (1<<16)
+#define RX_ERROR (1<<15)
+
+/* TX descriptor command */
+#define TX_EN_INT (1<<23)
+#define TX_GEN_CRC (1<<22)
+#define TX_ZERO_PADDING (1<<18)
+#define TX_FIRST_DESC (1<<17)
+#define TX_LAST_DESC (1<<16)
+#define TX_ERROR (1<<15)
+
+/* smi register */
+#define SMI_BUSY (1<<28) /* 0 - Write, 1 - Read */
+#define SMI_R_VALID (1<<27) /* 0 - Write, 1 - Read */
+#define SMI_OP_W (0<<26) /* Write operation */
+#define SMI_OP_R (1<<26) /* Read operation */
+
+#define HASH_ADD 0
+#define HASH_DELETE 1
+#define HASH_ADDR_TABLE_SIZE 0x4000 /* 16K (1/2K address - PCR_HS == 1) */
+#define HOP_NUMBER 12
+
+#define PHY_WAIT_ITERATIONS 1000 /* 1000 iterations * 10uS = 10mS max */
+#define PHY_WAIT_MICRO_SECONDS 10
+
+#define ETH_HW_IP_ALIGN 2 /* hw aligns IP header */
+#define ETH_EXTRA_HEADER (6+6+2+4)
+ /* dest+src addr+protocol id+crc */
+#define MAX_PKT_SIZE 1536
+
+
+/* Bit definitions of the SDMA Config Reg */
+#define SDCR_BSZ_OFF 12
+#define SDCR_BSZ8 (3<<SDCR_BSZ_OFF)
+#define SDCR_BSZ4 (2<<SDCR_BSZ_OFF)
+#define SDCR_BSZ2 (1<<SDCR_BSZ_OFF)
+#define SDCR_BSZ1 (0<<SDCR_BSZ_OFF)
+#define SDCR_BLMR (1<<6)
+#define SDCR_BLMT (1<<7)
+#define SDCR_RIFB (1<<9)
+#define SDCR_RC_OFF 2
+#define SDCR_RC_MAX_RETRANS (0xf << SDCR_RC_OFF)
+
+/* SDMA_CMD */
+#define SDMA_CMD_AT (1<<31)
+#define SDMA_CMD_TXDL (1<<24)
+#define SDMA_CMD_TXDH (1<<23)
+#define SDMA_CMD_AR (1<<15)
+#define SDMA_CMD_ERD (1<<7)
+
+
+/* Bit definitions of the Port Config Reg */
+#define PCR_HS (1<<12)
+#define PCR_EN (1<<7)
+#define PCR_PM (1<<0)
+
+/* Bit definitions of the Port Config Extend Reg */
+#define PCXR_2BSM (1<<28)
+#define PCXR_DSCP_EN (1<<21)
+#define PCXR_MFL_1518 (0<<14)
+#define PCXR_MFL_1536 (1<<14)
+#define PCXR_MFL_2048 (2<<14)
+#define PCXR_MFL_64K (3<<14)
+#define PCXR_FLP (1<<11)
+#define PCXR_PRIO_TX_OFF 3
+#define PCXR_TX_HIGH_PRI (7<<PCXR_PRIO_TX_OFF)
+
+/*
+ * * Bit definitions of the Interrupt Cause Reg
+ * * and Interrupt MASK Reg is the same
+ * */
+#define ICR_RXBUF (1<<0)
+#define ICR_TXBUF_H (1<<2)
+#define ICR_TXBUF_L (1<<3)
+#define ICR_TXEND_H (1<<6)
+#define ICR_TXEND_L (1<<7)
+#define ICR_RXERR (1<<8)
+#define ICR_TXERR_H (1<<10)
+#define ICR_TXERR_L (1<<11)
+#define ICR_TX_UDR (1<<13)
+#define ICR_MII_CH (1<<28)
+
+#define ALL_INTS (ICR_TXBUF_H | ICR_TXBUF_L | ICR_TX_UDR |\
+ ICR_TXERR_H | ICR_TXERR_L |\
+ ICR_TXEND_H | ICR_TXEND_L |\
+ ICR_RXBUF | ICR_RXERR | ICR_MII_CH)
+
+#define PHY_MASK 0x0000001f
+
+#define to_darmdfec(_kd) container_of(_kd, struct armdfec_device, dev)
+/* Size of a Tx/Rx descriptor used in chain list data structure */
+#define ARMDFEC_RXQ_DESC_ALIGNED_SIZE \
+ (((sizeof(struct rx_desc) / PKTALIGN) + 1) * PKTALIGN)
+
+#define RX_BUF_OFFSET 0x2
+#define RXQ 0x0 /* RX Queue 0 */
+#define TXQ 0x1 /* TX Queue 1 */
+
+struct addr_table_entry_t {
+ u32 lo;
+ u32 hi;
+};
+
+/* Bit fields of a Hash Table Entry */
+enum hash_table_entry {
+ HTEVALID = 1,
+ HTESKIP = 2,
+ HTERD = 4,
+ HTERDBIT = 2
+};
+
+struct tx_desc {
+ u32 cmd_sts; /* Command/status field */
+ u16 reserved;
+ u16 byte_cnt; /* buffer byte count */
+ u8 *buf_ptr; /* pointer to buffer for this descriptor */
+ struct tx_desc *nextdesc_p; /* Pointer to next descriptor */
+};
+
+struct rx_desc {
+ u32 cmd_sts; /* Descriptor command status */
+ u16 byte_cnt; /* Descriptor buffer byte count */
+ u16 buf_size; /* Buffer size */
+ u8 *buf_ptr; /* Descriptor buffer pointer */
+ struct rx_desc *nxtdesc_p; /* Next descriptor pointer */
+};
+
+/*
+ * Armada100 Fast Ethernet controller Registers
+ * Refer Datasheet Appendix A.22
+ */
+struct armdfec_reg {
+ u32 phyadr; /* PHY Address */
+ u32 pad1[3];
+ u32 smi; /* SMI */
+ u32 pad2[0xFB];
+ u32 pconf; /* Port configuration */
+ u32 pad3;
+ u32 pconf_ext; /* Port configuration extend */
+ u32 pad4;
+ u32 pcmd; /* Port Command */
+ u32 pad5;
+ u32 pstatus; /* Port Status */
+ u32 pad6;
+ u32 spar; /* Serial Parameters */
+ u32 pad7;
+ u32 htpr; /* Hash table pointer */
+ u32 pad8;
+ u32 fcsal; /* Flow control source address low */
+ u32 pad9;
+ u32 fcsah; /* Flow control source address high */
+ u32 pad10;
+ u32 sdma_conf; /* SDMA configuration */
+ u32 pad11;
+ u32 sdma_cmd; /* SDMA command */
+ u32 pad12;
+ u32 ic; /* Interrupt cause */
+ u32 iwc; /* Interrupt write to clear */
+ u32 im; /* Interrupt mask */
+ u32 pad13;
+ u32 *eth_idscpp[4]; /* Eth0 IP Differentiated Services Code
+ Point to Priority 0 Low */
+ u32 eth_vlan_p; /* Eth0 VLAN Priority Tag to Priority */
+ u32 pad14[3];
+ struct rx_desc *rxfdp[4]; /* Ethernet First Rx Descriptor
+ Pointer */
+ u32 pad15[4];
+ struct rx_desc *rxcdp[4]; /* Ethernet Current Rx Descriptor
+ Pointer */
+ u32 pad16[0x0C];
+ struct tx_desc *txcdp[2]; /* Ethernet Current Tx Descriptor
+ Pointer */
+};
+
+struct armdfec_device {
+ struct eth_device dev;
+ struct armdfec_reg *regs;
+ struct tx_desc *p_txdesc;
+ struct rx_desc *p_rxdesc;
+ struct rx_desc *p_rxdesc_curr;
+ u8 *p_rxbuf;
+ u8 *p_aligned_txbuf;
+ u8 *htpr; /* hash pointer */
+};
+
+#endif /* __ARMADA100_FEC_H__ */
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