/* * 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 <netdev.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 0; } 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