net/Blackfin: move on-chip MAC driver into drivers/net/

The Blackfin on-chip MAC driver was being managed in the BF537-STAMP board
directory, but it is not board specific, so relocate it to the drivers dir
so that other Blackfin ports can utilize it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

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