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path: root/drivers/net/bfin_mac.c
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-rw-r--r--drivers/net/bfin_mac.c523
1 files changed, 523 insertions, 0 deletions
diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
new file mode 100644
index 0000000..afe122a
--- /dev/null
+++ b/drivers/net/bfin_mac.c
@@ -0,0 +1,523 @@
+/*
+ * Driver for Blackfin On-Chip MAC device
+ *
+ * Copyright (c) 2005-2008 Analog Device, Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <config.h>
+#include <net.h>
+#include <command.h>
+#include <malloc.h>
+
+#include <asm/blackfin.h>
+#include <asm/mach-common/bits/dma.h>
+#include <asm/mach-common/bits/emac.h>
+#include <asm/mach-common/bits/pll.h>
+
+#include "bfin_mac.h"
+
+#ifdef CONFIG_POST
+#include <post.h>
+#endif
+
+#undef DEBUG_ETHERNET
+
+#ifdef DEBUG_ETHERNET
+#define DEBUGF(fmt, args...) printf(fmt, ##args)
+#else
+#define DEBUGF(fmt, args...)
+#endif
+
+#define RXBUF_BASE_ADDR 0xFF900000
+#define TXBUF_BASE_ADDR 0xFF800000
+#define TX_BUF_CNT 1
+
+#define TOUT_LOOP 1000000
+
+ADI_ETHER_BUFFER *txbuf[TX_BUF_CNT];
+ADI_ETHER_BUFFER *rxbuf[PKTBUFSRX];
+static u16 txIdx; /* index of the current RX buffer */
+static u16 rxIdx; /* index of the current TX buffer */
+
+u16 PHYregs[NO_PHY_REGS]; /* u16 PHYADDR; */
+
+/* DMAx_CONFIG values at DMA Restart */
+const ADI_DMA_CONFIG_REG rxdmacfg = {
+ .b_DMA_EN = 1, /* enabled */
+ .b_WNR = 1, /* write to memory */
+ .b_WDSIZE = 2, /* wordsize is 32 bits */
+ .b_DMA2D = 0,
+ .b_RESTART = 0,
+ .b_DI_SEL = 0,
+ .b_DI_EN = 0, /* no interrupt */
+ .b_NDSIZE = 5, /* 5 half words is desc size */
+ .b_FLOW = 7 /* large desc flow */
+};
+
+const ADI_DMA_CONFIG_REG txdmacfg = {
+ .b_DMA_EN = 1, /* enabled */
+ .b_WNR = 0, /* read from memory */
+ .b_WDSIZE = 2, /* wordsize is 32 bits */
+ .b_DMA2D = 0,
+ .b_RESTART = 0,
+ .b_DI_SEL = 0,
+ .b_DI_EN = 0, /* no interrupt */
+ .b_NDSIZE = 5, /* 5 half words is desc size */
+ .b_FLOW = 7 /* large desc flow */
+};
+
+int bfin_EMAC_initialize(bd_t *bis)
+{
+ struct eth_device *dev;
+ dev = (struct eth_device *)malloc(sizeof(*dev));
+ if (dev == NULL)
+ hang();
+
+ memset(dev, 0, sizeof(*dev));
+ sprintf(dev->name, "Blackfin EMAC");
+
+ dev->iobase = 0;
+ dev->priv = 0;
+ dev->init = bfin_EMAC_init;
+ dev->halt = bfin_EMAC_halt;
+ dev->send = bfin_EMAC_send;
+ dev->recv = bfin_EMAC_recv;
+
+ eth_register(dev);
+
+ return 1;
+}
+
+static int bfin_EMAC_send(struct eth_device *dev, volatile void *packet,
+ int length)
+{
+ int i;
+ int result = 0;
+ unsigned int *buf;
+ buf = (unsigned int *)packet;
+
+ if (length <= 0) {
+ printf("Ethernet: bad packet size: %d\n", length);
+ goto out;
+ }
+
+ if ((*pDMA2_IRQ_STATUS & DMA_ERR) != 0) {
+ printf("Ethernet: tx DMA error\n");
+ goto out;
+ }
+
+ for (i = 0; (*pDMA2_IRQ_STATUS & DMA_RUN) != 0; i++) {
+ if (i > TOUT_LOOP) {
+ puts("Ethernet: tx time out\n");
+ goto out;
+ }
+ }
+ txbuf[txIdx]->FrmData->NoBytes = length;
+ memcpy(txbuf[txIdx]->FrmData->Dest, (void *)packet, length);
+ txbuf[txIdx]->Dma[0].START_ADDR = (u32) txbuf[txIdx]->FrmData;
+ *pDMA2_NEXT_DESC_PTR = &txbuf[txIdx]->Dma[0];
+ *pDMA2_CONFIG = *(u16 *) (void *)(&txdmacfg);
+ *pEMAC_OPMODE |= TE;
+
+ for (i = 0; (txbuf[txIdx]->StatusWord & TX_COMP) == 0; i++) {
+ if (i > TOUT_LOOP) {
+ puts("Ethernet: tx error\n");
+ goto out;
+ }
+ }
+ result = txbuf[txIdx]->StatusWord;
+ txbuf[txIdx]->StatusWord = 0;
+ if ((txIdx + 1) >= TX_BUF_CNT)
+ txIdx = 0;
+ else
+ txIdx++;
+ out:
+ DEBUGF("BFIN EMAC send: length = %d\n", length);
+ return result;
+}
+
+static int bfin_EMAC_recv(struct eth_device *dev)
+{
+ int length = 0;
+
+ for (;;) {
+ if ((rxbuf[rxIdx]->StatusWord & RX_COMP) == 0) {
+ length = -1;
+ break;
+ }
+ if ((rxbuf[rxIdx]->StatusWord & RX_DMAO) != 0) {
+ printf("Ethernet: rx dma overrun\n");
+ break;
+ }
+ if ((rxbuf[rxIdx]->StatusWord & RX_OK) == 0) {
+ printf("Ethernet: rx error\n");
+ break;
+ }
+ length = rxbuf[rxIdx]->StatusWord & 0x000007FF;
+ if (length <= 4) {
+ printf("Ethernet: bad frame\n");
+ break;
+ }
+ NetRxPackets[rxIdx] =
+ (volatile uchar *)(rxbuf[rxIdx]->FrmData->Dest);
+ NetReceive(NetRxPackets[rxIdx], length - 4);
+ *pDMA1_IRQ_STATUS |= DMA_DONE | DMA_ERR;
+ rxbuf[rxIdx]->StatusWord = 0x00000000;
+ if ((rxIdx + 1) >= PKTBUFSRX)
+ rxIdx = 0;
+ else
+ rxIdx++;
+ }
+
+ return length;
+}
+
+/**************************************************************
+ *
+ * Ethernet Initialization Routine
+ *
+ *************************************************************/
+
+static int bfin_EMAC_init(struct eth_device *dev, bd_t *bd)
+{
+ u32 opmode;
+ int dat;
+ int i;
+ DEBUGF("Eth_init: ......\n");
+
+ txIdx = 0;
+ rxIdx = 0;
+
+/* Initialize System Register */
+ if (SetupSystemRegs(&dat) < 0)
+ return -1;
+
+/* Initialize EMAC address */
+ bfin_EMAC_setup_addr(bd);
+
+/* Initialize TX and RX buffer */
+ for (i = 0; i < PKTBUFSRX; i++) {
+ rxbuf[i] = SetupRxBuffer(i);
+ if (i > 0) {
+ rxbuf[i - 1]->Dma[1].NEXT_DESC_PTR =
+ &(rxbuf[i]->Dma[0]);
+ if (i == (PKTBUFSRX - 1))
+ rxbuf[i]->Dma[1].NEXT_DESC_PTR =
+ &(rxbuf[0]->Dma[0]);
+ }
+ }
+ for (i = 0; i < TX_BUF_CNT; i++) {
+ txbuf[i] = SetupTxBuffer(i);
+ if (i > 0) {
+ txbuf[i - 1]->Dma[1].NEXT_DESC_PTR =
+ &(txbuf[i]->Dma[0]);
+ if (i == (TX_BUF_CNT - 1))
+ txbuf[i]->Dma[1].NEXT_DESC_PTR =
+ &(txbuf[0]->Dma[0]);
+ }
+ }
+
+ /* Set RX DMA */
+ *pDMA1_NEXT_DESC_PTR = &rxbuf[0]->Dma[0];
+ *pDMA1_CONFIG = *((u16 *) (void *)&rxbuf[0]->Dma[0].CONFIG);
+
+ /* Wait MII done */
+ PollMdcDone();
+
+ /* We enable only RX here */
+ /* ASTP : Enable Automatic Pad Stripping
+ PR : Promiscuous Mode for test
+ PSF : Receive frames with total length less than 64 bytes.
+ FDMODE : Full Duplex Mode
+ LB : Internal Loopback for test
+ RE : Receiver Enable */
+ if (dat == FDMODE)
+ opmode = ASTP | FDMODE | PSF;
+ else
+ opmode = ASTP | PSF;
+ opmode |= RE;
+#ifdef CONFIG_BFIN_MAC_RMII
+ opmode |= TE | RMII;
+#endif
+ /* Turn on the EMAC */
+ *pEMAC_OPMODE = opmode;
+ return 0;
+}
+
+static void bfin_EMAC_halt(struct eth_device *dev)
+{
+ DEBUGF("Eth_halt: ......\n");
+ /* Turn off the EMAC */
+ *pEMAC_OPMODE = 0x00000000;
+ /* Turn off the EMAC RX DMA */
+ *pDMA1_CONFIG = 0x0000;
+ *pDMA2_CONFIG = 0x0000;
+
+}
+
+void bfin_EMAC_setup_addr(bd_t *bd)
+{
+ *pEMAC_ADDRLO =
+ bd->bi_enetaddr[0] |
+ bd->bi_enetaddr[1] << 8 |
+ bd->bi_enetaddr[2] << 16 |
+ bd->bi_enetaddr[3] << 24;
+ *pEMAC_ADDRHI =
+ bd->bi_enetaddr[4] |
+ bd->bi_enetaddr[5] << 8;
+}
+
+static void PollMdcDone(void)
+{
+ /* poll the STABUSY bit */
+ while (*pEMAC_STAADD & STABUSY) ;
+}
+
+static void WrPHYReg(u16 PHYAddr, u16 RegAddr, u16 Data)
+{
+ PollMdcDone();
+
+ *pEMAC_STADAT = Data;
+
+ *pEMAC_STAADD = SET_PHYAD(PHYAddr) | SET_REGAD(RegAddr) |
+ STAOP | STAIE | STABUSY;
+}
+
+/*********************************************************************************
+ * Read an off-chip register in a PHY through the MDC/MDIO port *
+ *********************************************************************************/
+static u16 RdPHYReg(u16 PHYAddr, u16 RegAddr)
+{
+ u16 Data;
+
+ PollMdcDone();
+
+ *pEMAC_STAADD = SET_PHYAD(PHYAddr) | SET_REGAD(RegAddr) |
+ STAIE | STABUSY;
+
+ PollMdcDone();
+
+ Data = (u16) * pEMAC_STADAT;
+
+ PHYregs[RegAddr] = Data; /* save shadow copy */
+
+ return Data;
+}
+
+#if 0 /* dead code ? */
+static void SoftResetPHY(void)
+{
+ u16 phydat;
+ /* set the reset bit */
+ WrPHYReg(PHYADDR, PHY_MODECTL, PHY_RESET);
+ /* and clear it again */
+ WrPHYReg(PHYADDR, PHY_MODECTL, 0x0000);
+ do {
+ /* poll until reset is complete */
+ phydat = RdPHYReg(PHYADDR, PHY_MODECTL);
+ } while ((phydat & PHY_RESET) != 0);
+}
+#endif
+
+static int SetupSystemRegs(int *opmode)
+{
+ u16 sysctl, phydat;
+ int count = 0;
+ /* Enable PHY output */
+ *pVR_CTL |= CLKBUFOE;
+ /* Set all the pins to peripheral mode */
+
+#ifndef CONFIG_BFIN_MAC_RMII
+ *pPORTH_FER = 0xFFFF;
+#ifdef __ADSPBF52x__
+ *pPORTH_MUX = PORT_x_MUX_0_FUNC_2 | PORT_x_MUX_1_FUNC_2 | PORT_x_MUX_2_FUNC_2;
+#endif
+#else
+#if defined(__ADSPBF536__) || defined(__ADSPBF537__)
+ *pPORTH_FER = 0xC373;
+#endif
+#ifdef __ADSPBF52x__
+ *pPORTH_FER = 0x01FF;
+ *pPORTH_MUX = PORT_x_MUX_0_FUNC_2 | PORT_x_MUX_1_FUNC_2;
+#endif
+#endif
+ /* MDC = 2.5 MHz */
+ sysctl = SET_MDCDIV(24);
+ /* Odd word alignment for Receive Frame DMA word */
+ /* Configure checksum support and rcve frame word alignment */
+ sysctl |= RXDWA | RXCKS;
+ *pEMAC_SYSCTL = sysctl;
+ /* auto negotiation on */
+ /* full duplex */
+ /* 100 Mbps */
+ phydat = PHY_ANEG_EN | PHY_DUPLEX | PHY_SPD_SET;
+ WrPHYReg(PHYADDR, PHY_MODECTL, phydat);
+ do {
+ udelay(1000);
+ phydat = RdPHYReg(PHYADDR, PHY_MODESTAT);
+ if (count > 3000) {
+ printf
+ ("Link is down, please check your network connection\n");
+ return -1;
+ }
+ count++;
+ } while (!(phydat & 0x0004));
+
+ phydat = RdPHYReg(PHYADDR, PHY_ANLPAR);
+
+ if ((phydat & 0x0100) || (phydat & 0x0040))
+ *opmode = FDMODE;
+ else
+ *opmode = 0;
+
+ *pEMAC_MMC_CTL = RSTC | CROLL;
+
+ /* Initialize the TX DMA channel registers */
+ *pDMA2_X_COUNT = 0;
+ *pDMA2_X_MODIFY = 4;
+ *pDMA2_Y_COUNT = 0;
+ *pDMA2_Y_MODIFY = 0;
+
+ /* Initialize the RX DMA channel registers */
+ *pDMA1_X_COUNT = 0;
+ *pDMA1_X_MODIFY = 4;
+ *pDMA1_Y_COUNT = 0;
+ *pDMA1_Y_MODIFY = 0;
+ return 0;
+}
+
+ADI_ETHER_BUFFER *SetupRxBuffer(int no)
+{
+ ADI_ETHER_FRAME_BUFFER *frmbuf;
+ ADI_ETHER_BUFFER *buf;
+ int nobytes_buffer = sizeof(ADI_ETHER_BUFFER[2]) / 2; /* ensure a multi. of 4 */
+ int total_size = nobytes_buffer + RECV_BUFSIZE;
+
+ buf = (ADI_ETHER_BUFFER *) (RXBUF_BASE_ADDR + no * total_size);
+ frmbuf =
+ (ADI_ETHER_FRAME_BUFFER *) (RXBUF_BASE_ADDR + no * total_size +
+ nobytes_buffer);
+
+ memset(buf, 0x00, nobytes_buffer);
+ buf->FrmData = frmbuf;
+ memset(frmbuf, 0xfe, RECV_BUFSIZE);
+
+ /* set up first desc to point to receive frame buffer */
+ buf->Dma[0].NEXT_DESC_PTR = &(buf->Dma[1]);
+ buf->Dma[0].START_ADDR = (u32) buf->FrmData;
+ buf->Dma[0].CONFIG.b_DMA_EN = 1; /* enabled */
+ buf->Dma[0].CONFIG.b_WNR = 1; /* Write to memory */
+ buf->Dma[0].CONFIG.b_WDSIZE = 2; /* wordsize is 32 bits */
+ buf->Dma[0].CONFIG.b_NDSIZE = 5; /* 5 half words is desc size. */
+ buf->Dma[0].CONFIG.b_FLOW = 7; /* large desc flow */
+
+ /* set up second desc to point to status word */
+ buf->Dma[1].NEXT_DESC_PTR = &(buf->Dma[0]);
+ buf->Dma[1].START_ADDR = (u32) & buf->IPHdrChksum;
+ buf->Dma[1].CONFIG.b_DMA_EN = 1; /* enabled */
+ buf->Dma[1].CONFIG.b_WNR = 1; /* Write to memory */
+ buf->Dma[1].CONFIG.b_WDSIZE = 2; /* wordsize is 32 bits */
+ buf->Dma[1].CONFIG.b_DI_EN = 1; /* enable interrupt */
+ buf->Dma[1].CONFIG.b_NDSIZE = 5; /* must be 0 when FLOW is 0 */
+ buf->Dma[1].CONFIG.b_FLOW = 7; /* stop */
+
+ return buf;
+}
+
+ADI_ETHER_BUFFER *SetupTxBuffer(int no)
+{
+ ADI_ETHER_FRAME_BUFFER *frmbuf;
+ ADI_ETHER_BUFFER *buf;
+ int nobytes_buffer = sizeof(ADI_ETHER_BUFFER[2]) / 2; /* ensure a multi. of 4 */
+ int total_size = nobytes_buffer + RECV_BUFSIZE;
+
+ buf = (ADI_ETHER_BUFFER *) (TXBUF_BASE_ADDR + no * total_size);
+ frmbuf =
+ (ADI_ETHER_FRAME_BUFFER *) (TXBUF_BASE_ADDR + no * total_size +
+ nobytes_buffer);
+
+ memset(buf, 0x00, nobytes_buffer);
+ buf->FrmData = frmbuf;
+ memset(frmbuf, 0x00, RECV_BUFSIZE);
+
+ /* set up first desc to point to receive frame buffer */
+ buf->Dma[0].NEXT_DESC_PTR = &(buf->Dma[1]);
+ buf->Dma[0].START_ADDR = (u32) buf->FrmData;
+ buf->Dma[0].CONFIG.b_DMA_EN = 1; /* enabled */
+ buf->Dma[0].CONFIG.b_WNR = 0; /* Read to memory */
+ buf->Dma[0].CONFIG.b_WDSIZE = 2; /* wordsize is 32 bits */
+ buf->Dma[0].CONFIG.b_NDSIZE = 5; /* 5 half words is desc size. */
+ buf->Dma[0].CONFIG.b_FLOW = 7; /* large desc flow */
+
+ /* set up second desc to point to status word */
+ buf->Dma[1].NEXT_DESC_PTR = &(buf->Dma[0]);
+ buf->Dma[1].START_ADDR = (u32) & buf->StatusWord;
+ buf->Dma[1].CONFIG.b_DMA_EN = 1; /* enabled */
+ buf->Dma[1].CONFIG.b_WNR = 1; /* Write to memory */
+ buf->Dma[1].CONFIG.b_WDSIZE = 2; /* wordsize is 32 bits */
+ buf->Dma[1].CONFIG.b_DI_EN = 1; /* enable interrupt */
+ buf->Dma[1].CONFIG.b_NDSIZE = 0; /* must be 0 when FLOW is 0 */
+ buf->Dma[1].CONFIG.b_FLOW = 0; /* stop */
+
+ return buf;
+}
+
+#if defined(CONFIG_POST) && defined(CFG_POST_ETHER)
+int ether_post_test(int flags)
+{
+ uchar buf[64];
+ int i, value = 0;
+ int length;
+
+ printf("\n--------");
+ bfin_EMAC_init(NULL, NULL);
+ /* construct the package */
+ buf[0] = buf[6] = (unsigned char)(*pEMAC_ADDRLO & 0xFF);
+ buf[1] = buf[7] = (unsigned char)((*pEMAC_ADDRLO & 0xFF00) >> 8);
+ buf[2] = buf[8] = (unsigned char)((*pEMAC_ADDRLO & 0xFF0000) >> 16);
+ buf[3] = buf[9] = (unsigned char)((*pEMAC_ADDRLO & 0xFF000000) >> 24);
+ buf[4] = buf[10] = (unsigned char)(*pEMAC_ADDRHI & 0xFF);
+ buf[5] = buf[11] = (unsigned char)((*pEMAC_ADDRHI & 0xFF00) >> 8);
+ buf[12] = 0x08; /* Type: ARP */
+ buf[13] = 0x06;
+ buf[14] = 0x00; /* Hardware type: Ethernet */
+ buf[15] = 0x01;
+ buf[16] = 0x08; /* Protocal type: IP */
+ buf[17] = 0x00;
+ buf[18] = 0x06; /* Hardware size */
+ buf[19] = 0x04; /* Protocol size */
+ buf[20] = 0x00; /* Opcode: request */
+ buf[21] = 0x01;
+
+ for (i = 0; i < 42; i++)
+ buf[i + 22] = i;
+ printf("--------Send 64 bytes......\n");
+ bfin_EMAC_send(NULL, (volatile void *)buf, 64);
+ for (i = 0; i < 100; i++) {
+ udelay(10000);
+ if ((rxbuf[rxIdx]->StatusWord & RX_COMP) != 0) {
+ value = 1;
+ break;
+ }
+ }
+ if (value == 0) {
+ printf("--------EMAC can't receive any data\n");
+ eth_halt();
+ return -1;
+ }
+ length = rxbuf[rxIdx]->StatusWord & 0x000007FF - 4;
+ for (i = 0; i < length; i++) {
+ if (rxbuf[rxIdx]->FrmData->Dest[i] != buf[i]) {
+ printf("--------EMAC receive error data!\n");
+ eth_halt();
+ return -1;
+ }
+ }
+ printf("--------receive %d bytes, matched\n", length);
+ bfin_EMAC_halt(NULL);
+ return 0;
+}
+#endif
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