4xx_enet.c

来自「uboot详细解读可用启动引导LINUX2.6内核」· C语言 代码 · 共 2,100 行 · 第 1/4 页

	/* set the Mal configuration reg */
#if defined(CONFIG_440GX) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
	mtdcr (malmcr, MAL_CR_PLBB | MAL_CR_OPBBL | MAL_CR_LEA |
	       MAL_CR_PLBLT_DEFAULT | MAL_CR_EOPIE | 0x00330000);
#else
	mtdcr (malmcr, MAL_CR_PLBB | MAL_CR_OPBBL | MAL_CR_LEA | MAL_CR_PLBLT_DEFAULT);
	/* Errata 1.12: MAL_1 -- Disable MAL bursting */
	if (get_pvr() == PVR_440GP_RB) {
		mtdcr (malmcr, mfdcr(malmcr) & ~MAL_CR_PLBB);
	}
#endif

	/*
	 * Malloc MAL buffer desciptors, make sure they are
	 * aligned on cache line boundary size
	 * (401/403/IOP480 = 16, 405 = 32)
	 * and doesn't cross cache block boundaries.
	 */
	if (hw_p->first_init == 0) {
		debug("*** Allocating descriptor memory ***\n");

		bd_cached = (u32)malloc_aligned(MAL_ALLOC_SIZE, 4096);
		if (!bd_cached) {
			printf("%s: Error allocating MAL descriptor buffers!\n", __func__);
			return -1;
		}

#ifdef CONFIG_4xx_DCACHE
		flush_dcache_range(bd_cached, bd_cached + MAL_ALLOC_SIZE);
		if (!last_used_ea)
#if defined(CFG_MEM_TOP_HIDE)
			bd_uncached = bis->bi_memsize + CFG_MEM_TOP_HIDE;
#else
			bd_uncached = bis->bi_memsize;
#endif
		else
			bd_uncached = last_used_ea + MAL_ALLOC_SIZE;

		last_used_ea = bd_uncached;
		program_tlb(bd_cached, bd_uncached, MAL_ALLOC_SIZE,
			    TLB_WORD2_I_ENABLE);
#else
		bd_uncached = bd_cached;
#endif
		hw_p->tx_phys = bd_cached;
		hw_p->rx_phys = bd_cached + MAL_TX_DESC_SIZE;
		hw_p->tx = (mal_desc_t *)(bd_uncached);
		hw_p->rx = (mal_desc_t *)(bd_uncached + MAL_TX_DESC_SIZE);
		debug("hw_p->tx=%08x, hw_p->rx=%08x\n", hw_p->tx, hw_p->rx);
	}

	for (i = 0; i < NUM_TX_BUFF; i++) {
		hw_p->tx[i].ctrl = 0;
		hw_p->tx[i].data_len = 0;
		if (hw_p->first_init == 0)
			hw_p->txbuf_ptr = malloc_aligned(MAL_ALLOC_SIZE,
							 L1_CACHE_BYTES);
		hw_p->tx[i].data_ptr = hw_p->txbuf_ptr;
		if ((NUM_TX_BUFF - 1) == i)
			hw_p->tx[i].ctrl |= MAL_TX_CTRL_WRAP;
		hw_p->tx_run[i] = -1;
		debug("TX_BUFF %d @ 0x%08lx\n", i, (u32)hw_p->tx[i].data_ptr);
	}

	for (i = 0; i < NUM_RX_BUFF; i++) {
		hw_p->rx[i].ctrl = 0;
		hw_p->rx[i].data_len = 0;
		hw_p->rx[i].data_ptr = (char *)NetRxPackets[i];
		if ((NUM_RX_BUFF - 1) == i)
			hw_p->rx[i].ctrl |= MAL_RX_CTRL_WRAP;
		hw_p->rx[i].ctrl |= MAL_RX_CTRL_EMPTY | MAL_RX_CTRL_INTR;
		hw_p->rx_ready[i] = -1;
		debug("RX_BUFF %d @ 0x%08lx\n", i, (u32)hw_p->rx[i].data_ptr);
	}

	reg = 0x00000000;

	reg |= dev->enetaddr[0];	/* set high address */
	reg = reg << 8;
	reg |= dev->enetaddr[1];

	out_be32((void *)EMAC_IAH + hw_p->hw_addr, reg);

	reg = 0x00000000;
	reg |= dev->enetaddr[2];	/* set low address  */
	reg = reg << 8;
	reg |= dev->enetaddr[3];
	reg = reg << 8;
	reg |= dev->enetaddr[4];
	reg = reg << 8;
	reg |= dev->enetaddr[5];

	out_be32((void *)EMAC_IAL + hw_p->hw_addr, reg);

	switch (devnum) {
	case 1:
		/* setup MAL tx & rx channel pointers */
#if defined (CONFIG_405EP) || defined (CONFIG_440EP) || defined (CONFIG_440GR)
		mtdcr (maltxctp2r, hw_p->tx_phys);
#else
		mtdcr (maltxctp1r, hw_p->tx_phys);
#endif
#if defined(CONFIG_440)
		mtdcr (maltxbattr, 0x0);
		mtdcr (malrxbattr, 0x0);
#endif

#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
		mtdcr (malrxctp8r, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (malrcbs8, ENET_MAX_MTU_ALIGNED / 16);
#else
		mtdcr (malrxctp1r, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (malrcbs1, ENET_MAX_MTU_ALIGNED / 16);
#endif
		break;
#if defined (CONFIG_440GX)
	case 2:
		/* setup MAL tx & rx channel pointers */
		mtdcr (maltxbattr, 0x0);
		mtdcr (malrxbattr, 0x0);
		mtdcr (maltxctp2r, hw_p->tx_phys);
		mtdcr (malrxctp2r, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (malrcbs2, ENET_MAX_MTU_ALIGNED / 16);
		break;
	case 3:
		/* setup MAL tx & rx channel pointers */
		mtdcr (maltxbattr, 0x0);
		mtdcr (maltxctp3r, hw_p->tx_phys);
		mtdcr (malrxbattr, 0x0);
		mtdcr (malrxctp3r, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (malrcbs3, ENET_MAX_MTU_ALIGNED / 16);
		break;
#endif /* CONFIG_440GX */
#if defined (CONFIG_460GT)
	case 2:
		/* setup MAL tx & rx channel pointers */
		mtdcr (maltxbattr, 0x0);
		mtdcr (malrxbattr, 0x0);
		mtdcr (maltxctp2r, hw_p->tx_phys);
		mtdcr (malrxctp16r, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (malrcbs16, ENET_MAX_MTU_ALIGNED / 16);
		break;
	case 3:
		/* setup MAL tx & rx channel pointers */
		mtdcr (maltxbattr, 0x0);
		mtdcr (malrxbattr, 0x0);
		mtdcr (maltxctp3r, hw_p->tx_phys);
		mtdcr (malrxctp24r, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (malrcbs24, ENET_MAX_MTU_ALIGNED / 16);
		break;
#endif /* CONFIG_460GT */
	case 0:
	default:
		/* setup MAL tx & rx channel pointers */
#if defined(CONFIG_440)
		mtdcr (maltxbattr, 0x0);
		mtdcr (malrxbattr, 0x0);
#endif
		mtdcr (maltxctp0r, hw_p->tx_phys);
		mtdcr (malrxctp0r, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (malrcbs0, ENET_MAX_MTU_ALIGNED / 16);
		break;
	}

	/* Enable MAL transmit and receive channels */
#if defined(CONFIG_405EP) || defined(CONFIG_440EP) || defined(CONFIG_440GR)
	mtdcr (maltxcasr, (MAL_TXRX_CASR >> (hw_p->devnum*2)));
#else
	mtdcr (maltxcasr, (MAL_TXRX_CASR >> hw_p->devnum));
#endif
	mtdcr (malrxcasr, (MAL_TXRX_CASR >> hw_p->devnum));

	/* set transmit enable & receive enable */
	out_be32((void *)EMAC_M0 + hw_p->hw_addr, EMAC_M0_TXE | EMAC_M0_RXE);

	mode_reg = in_be32((void *)EMAC_M1 + hw_p->hw_addr);

	/* set rx-/tx-fifo size */
	mode_reg = (mode_reg & ~EMAC_MR1_FIFO_MASK) | EMAC_MR1_FIFO_SIZE;

	/* set speed */
	if (speed == _1000BASET) {
#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_440SP) || defined(CONFIG_440SPE)
		unsigned long pfc1;

		mfsdr (sdr_pfc1, pfc1);
		pfc1 |= SDR0_PFC1_EM_1000;
		mtsdr (sdr_pfc1, pfc1);
#endif
		mode_reg = mode_reg | EMAC_M1_MF_1000MBPS | EMAC_M1_IST;
	} else if (speed == _100BASET)
		mode_reg = mode_reg | EMAC_M1_MF_100MBPS | EMAC_M1_IST;
	else
		mode_reg = mode_reg & ~0x00C00000;	/* 10 MBPS */
	if (duplex == FULL)
		mode_reg = mode_reg | 0x80000000 | EMAC_M1_IST;

	out_be32((void *)EMAC_M1 + hw_p->hw_addr, mode_reg);

	/* Enable broadcast and indvidual address */
	/* TBS: enabling runts as some misbehaved nics will send runts */
	out_be32((void *)EMAC_RXM + hw_p->hw_addr, EMAC_RMR_BAE | EMAC_RMR_IAE);

	/* we probably need to set the tx mode1 reg? maybe at tx time */

	/* set transmit request threshold register */
	out_be32((void *)EMAC_TRTR + hw_p->hw_addr, 0x18000000);	/* 256 byte threshold */

	/* set receive	low/high water mark register */
#if defined(CONFIG_440)
	/* 440s has a 64 byte burst length */
	out_be32((void *)EMAC_RX_HI_LO_WMARK + hw_p->hw_addr, 0x80009000);
#else
	/* 405s have a 16 byte burst length */
	out_be32((void *)EMAC_RX_HI_LO_WMARK + hw_p->hw_addr, 0x0f002000);
#endif /* defined(CONFIG_440) */
	out_be32((void *)EMAC_TXM1 + hw_p->hw_addr, 0xf8640000);

	/* Set fifo limit entry in tx mode 0 */
	out_be32((void *)EMAC_TXM0 + hw_p->hw_addr, 0x00000003);
	/* Frame gap set */
	out_be32((void *)EMAC_I_FRAME_GAP_REG + hw_p->hw_addr, 0x00000008);

	/* Set EMAC IER */
	hw_p->emac_ier = EMAC_ISR_PTLE | EMAC_ISR_BFCS | EMAC_ISR_ORE | EMAC_ISR_IRE;
	if (speed == _100BASET)
		hw_p->emac_ier = hw_p->emac_ier | EMAC_ISR_SYE;

	out_be32((void *)EMAC_ISR + hw_p->hw_addr, 0xffffffff);	/* clear pending interrupts */
	out_be32((void *)EMAC_IER + hw_p->hw_addr, hw_p->emac_ier);

	if (hw_p->first_init == 0) {
		/*
		 * Connect interrupt service routines
		 */
		irq_install_handler(ETH_IRQ_NUM(hw_p->devnum),
				    (interrupt_handler_t *) enetInt, dev);
	}

	mtmsr (msr);		/* enable interrupts again */

	hw_p->bis = bis;
	hw_p->first_init = 1;

	return 0;
}


static int ppc_4xx_eth_send (struct eth_device *dev, volatile void *ptr,
			      int len)
{
	struct enet_frame *ef_ptr;
	ulong time_start, time_now;
	unsigned long temp_txm0;
	EMAC_4XX_HW_PST hw_p = dev->priv;

	ef_ptr = (struct enet_frame *) ptr;

	/*-----------------------------------------------------------------------+
	 *  Copy in our address into the frame.
	 *-----------------------------------------------------------------------*/
	(void) memcpy (ef_ptr->source_addr, dev->enetaddr, ENET_ADDR_LENGTH);

	/*-----------------------------------------------------------------------+
	 * If frame is too long or too short, modify length.
	 *-----------------------------------------------------------------------*/
	/* TBS: where does the fragment go???? */
	if (len > ENET_MAX_MTU)
		len = ENET_MAX_MTU;

	/*   memcpy ((void *) &tx_buff[tx_slot], (const void *) ptr, len); */
	memcpy ((void *) hw_p->txbuf_ptr, (const void *) ptr, len);
	flush_dcache_range((u32)hw_p->txbuf_ptr, (u32)hw_p->txbuf_ptr + len);

	/*-----------------------------------------------------------------------+
	 * set TX Buffer busy, and send it
	 *-----------------------------------------------------------------------*/
	hw_p->tx[hw_p->tx_slot].ctrl = (MAL_TX_CTRL_LAST |
					EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP) &
		~(EMAC_TX_CTRL_ISA | EMAC_TX_CTRL_RSA);
	if ((NUM_TX_BUFF - 1) == hw_p->tx_slot)
		hw_p->tx[hw_p->tx_slot].ctrl |= MAL_TX_CTRL_WRAP;

	hw_p->tx[hw_p->tx_slot].data_len = (short) len;
	hw_p->tx[hw_p->tx_slot].ctrl |= MAL_TX_CTRL_READY;

	sync();

	out_be32((void *)EMAC_TXM0 + hw_p->hw_addr,
		 in_be32((void *)EMAC_TXM0 + hw_p->hw_addr) | EMAC_TXM0_GNP0);
#ifdef INFO_4XX_ENET
	hw_p->stats.pkts_tx++;
#endif

	/*-----------------------------------------------------------------------+
	 * poll unitl the packet is sent and then make sure it is OK
	 *-----------------------------------------------------------------------*/
	time_start = get_timer (0);
	while (1) {
		temp_txm0 = in_be32((void *)EMAC_TXM0 + hw_p->hw_addr);
		/* loop until either TINT turns on or 3 seconds elapse */
		if ((temp_txm0 & EMAC_TXM0_GNP0) != 0) {
			/* transmit is done, so now check for errors
			 * If there is an error, an interrupt should
			 * happen when we return
			 */
			time_now = get_timer (0);
			if ((time_now - time_start) > 3000) {
				return (-1);
			}
		} else {
			return (len);
		}
	}
}


#if defined (CONFIG_440) || defined(CONFIG_405EX)

#if defined(CONFIG_440SP) || defined(CONFIG_440SPE)
/*
 * Hack: On 440SP all enet irq sources are located on UIC1
 * Needs some cleanup. --sr
 */
#define UIC0MSR		uic1msr
#define UIC0SR		uic1sr
#define UIC1MSR		uic1msr
#define UIC1SR		uic1sr
#elif defined(CONFIG_460EX) || defined(CONFIG_460GT)
/*
 * Hack: On 460EX/GT all enet irq sources are located on UIC2
 * Needs some cleanup. --ag
 */
#define UIC0MSR		uic2msr
#define UIC0SR		uic2sr
#define UIC1MSR		uic2msr
#define UIC1SR		uic2sr
#else
#define UIC0MSR		uic0msr
#define UIC0SR		uic0sr
#define UIC1MSR		uic1msr
#define UIC1SR		uic1sr
#endif

#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_405EX)
#define UICMSR_ETHX	uic0msr
#define UICSR_ETHX	uic0sr
#elif defined(CONFIG_460EX) || defined(CONFIG_460GT)
#define UICMSR_ETHX	uic2msr
#define UICSR_ETHX	uic2sr
#else
#define UICMSR_ETHX	uic1msr
#define UICSR_ETHX	uic1sr
#endif

int enetInt (struct eth_device *dev)
{
	int serviced;
	int rc = -1;		/* default to not us */
	unsigned long mal_isr;
	unsigned long emac_isr = 0;
	unsigned long mal_rx_eob;
	unsigned long my_uic0msr, my_uic1msr;
	unsigned long my_uicmsr_ethx;

#if defined(CONFIG_440GX)
	unsigned long my_uic2msr;
#endif
	EMAC_4XX_HW_PST hw_p;

	/*
	 * Because the mal is generic, we need to get the current
	 * eth device
	 */
#if defined(CONFIG_NET_MULTI)
	dev = eth_get_dev();
#else
	dev = emac0_dev;
#endif

	hw_p = dev->priv;

	/* enter loop that stays in interrupt code until nothing to service */
	do {
		serviced = 0;

		my_uic0msr = mfdcr (UIC0MSR);
		my_uic1msr = mfdcr (UIC1MSR);
#if defined(CONFIG_440GX)
		my_uic2msr = mfdcr (uic2msr);
#endif
		my_uicmsr_ethx = mfdcr (UICMSR_ETHX);

		if (!(my_uic0msr & (UIC_MRE | UIC_MTE))
		    && !(my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))
		    && !(my_uicmsr_ethx & (UIC_ETH0 | UIC_ETH1))) {
			/* not for us */
			return (rc);
		}
#if defined (CONFIG_440GX)
		if (!(my_uic0msr & (UIC_MRE | UIC_MTE))
		    && !(my_uic2msr & (UIC_ETH2 | UIC_ETH3))) {
			/* not for us */
			return (rc);
		}
#endif
		/* get and clear controller status interrupts */
		/* look at Mal and EMAC interrupts */
		if ((my_uic0msr & (UIC_MRE | UIC_MTE))
		    || (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))) {
			/* we have a MAL interrupt */
			mal_isr = mfdcr (malesr);
			/* look for mal error */
			if (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE)) {
				mal_err (dev, mal_isr, my_uic1msr, MAL_UIC_DEF, MAL_UIC_ERR);
				serviced = 1;
				rc = 0;
			}
		}

		/* port by port dispatch of emac interrupts */
		if (hw_p->devnum == 0) {
			if (UIC_ETH0 & my_uicmsr_ethx) {	/* look for EMAC errors */
				emac_isr = in_be32((void *)EMAC_ISR + hw_p->hw_addr);
				if ((hw_p->emac_ier & emac_isr) != 0) {
					emac_err (dev, emac_isr);
					serviced = 1;
					rc = 0;
				}
			}
			if ((hw_p->emac_ier & emac_isr)
			    || (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))) {
				mtdcr (UIC0SR, UIC_MRE | UIC_MTE);	/* Clear */
				mtdcr (UIC1SR, UIC_MS | UIC_MTDE | UIC_MRDE);	/* Clear */
				mtdcr (UICSR_ETHX, UIC_ETH0); /* Clear */
				return (rc);	/* we had errors so get out */
			}
		}

#if !defined(CONFIG_440SP)
		if (hw_p->devnum == 1) {
			if (UIC_ETH1 & my_uicmsr_ethx) {	/* look for EMAC errors */
				emac_isr = in_be32((void *)EMAC_ISR + hw_p->hw_addr);
				if ((hw_p->emac_ier & emac_isr) != 0) {
					emac_err (dev, emac_isr);
					serviced = 1;
					rc = 0;
				}
			}
			if ((hw_p->emac_ier & emac_isr)
			    || (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))) {
				mtdcr (UIC0SR, UIC_MRE | UIC_MTE);	/* Clear */
				mtdcr (UIC1SR, UIC_MS | UIC_MTDE | UIC_MRDE); /* Clear */
				mtdcr (UICSR_ETHX, UIC_ETH1); /* Clear */
				return (rc);	/* we had errors so get out */
			}
		}
#if defined (CONFIG_440GX)
		if (hw_p->devnum == 2) {
			if (UIC_ETH2 & my_uic2msr) {	/* look for EMAC errors */
				emac_isr = in_be32((void *)EMAC_ISR + hw_p->hw_addr);
				if ((hw_p->emac_ier & emac_isr) != 0) {
					emac_err (dev, emac_isr);
					serviced = 1;
					rc = 0;
				}
			}
			if ((hw_p->emac_ier & emac_isr)
			    || (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))) {
				mtdcr (UIC0SR, UIC_MRE | UIC_MTE);	/* Clear */
				mtdcr (UIC1SR, UIC_MS | UIC_MTDE | UIC_MRDE);	/* Clear */
				mtdcr (uic2sr, UIC_ETH2);
				return (rc);	/* we had errors so get out */
			}
		}

		if (hw_p->devnum == 3) {
			if (UIC_ETH3 & my_uic2msr) {	/* look for EMAC errors */
				emac_isr = in_be32((void *)EMAC_ISR + hw_p->hw_addr);
				if ((hw_p->emac_ier & emac_isr) != 0) {
					emac_err (dev, emac_isr);
					serviced = 1;
					rc = 0;
				}
			}
			if ((hw_p->emac_ier & emac_isr)
			    || (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))) {
				mtdcr (UIC0SR, UIC_MRE | UIC_MTE);	/* Clear */
				mtdcr (UIC1SR, UIC_MS | UIC_MTDE | UIC_MRDE);	/* Clear */
				mtdcr (uic2sr, UIC_ETH3);
				return (rc);	/* we had errors so get out */
			}
		}
#endif /* CONFIG_440GX */
#endif /* !CONFIG_440SP */

		/* handle MAX TX EOB interrupt from a tx */
		if (my_uic0msr & UIC_MTE) {
			mal_rx_eob = mfdcr (maltxeobisr);
			mtdcr (maltxeobisr, mal_rx_eob);
			mtdcr (UIC0SR, UIC_MTE);
		}
		/* handle MAL RX EOB  interupt from a receive */
		/* check for EOB on valid channels	      */
		if (my_uic0msr & UIC_MRE) {
			mal_rx_eob = mfdcr (malrxeobisr);
			if ((mal_rx_eob &
			     (0x80000000 >> (hw_p->devnum * MAL_RX_CHAN_MUL)))
			    != 0) { /* call emac routine for channel x */
				/* clear EOB
				   mtdcr(malrxeobisr, mal_rx_eob); */