uec.c

U-boot源码 ARM7启动代码

		if (i==0) {
			init_enet_offset = 0;
		} else {
			init_enet_offset = qe_muram_alloc(
					sizeof(uec_thread_rx_pram_t),
					 UEC_THREAD_RX_PRAM_ALIGNMENT);
		}

		entry_val = ((u32)snum << ENET_INIT_PARAM_SNUM_SHIFT) |
				 init_enet_offset | (u32)uec_info->riscRx;
		p_init_enet_param->rxthread[i] = entry_val;
	}

	/* Init Tx global parameter pointer */
	p_init_enet_param->txglobal = uec->tx_glbl_pram_offset |
					 (u32)uec_info->riscTx;

	/* Init Tx threads */
	for (i = 0; i < thread_tx; i++) {
		if ((snum = qe_get_snum()) < 0)	{
			printf("%s can not get snum\n", __FUNCTION__);
			return -ENOMEM;
		}

		init_enet_offset = qe_muram_alloc(sizeof(uec_thread_tx_pram_t),
						 UEC_THREAD_TX_PRAM_ALIGNMENT);

		entry_val = ((u32)snum << ENET_INIT_PARAM_SNUM_SHIFT) |
				 init_enet_offset | (u32)uec_info->riscTx;
		p_init_enet_param->txthread[i] = entry_val;
	}

	__asm__ __volatile__("sync");

	/* Issue QE command */
	command = QE_INIT_TX_RX;
	cecr_subblock =	ucc_fast_get_qe_cr_subblock(
				uec->uec_info->uf_info.ucc_num);
	qe_issue_cmd(command, cecr_subblock, (u8) QE_CR_PROTOCOL_ETHERNET,
						 init_enet_param_offset);

	return 0;
}

static int uec_startup(uec_private_t *uec)
{
	uec_info_t			*uec_info;
	ucc_fast_info_t			*uf_info;
	ucc_fast_private_t		*uccf;
	ucc_fast_t			*uf_regs;
	uec_t				*uec_regs;
	int				num_threads_tx;
	int				num_threads_rx;
	u32				utbipar;
	enet_interface_e		enet_interface;
	u32				length;
	u32				align;
	qe_bd_t				*bd;
	u8				*buf;
	int				i;

	if (!uec || !uec->uec_info) {
		printf("%s: uec or uec_info not initial\n", __FUNCTION__);
		return -EINVAL;
	}

	uec_info = uec->uec_info;
	uf_info = &(uec_info->uf_info);

	/* Check if Rx BD ring len is illegal */
	if ((uec_info->rx_bd_ring_len < UEC_RX_BD_RING_SIZE_MIN) || \
		(uec_info->rx_bd_ring_len % UEC_RX_BD_RING_SIZE_ALIGNMENT)) {
		printf("%s: Rx BD ring len must be multiple of 4, and > 8.\n",
			 __FUNCTION__);
		return -EINVAL;
	}

	/* Check if Tx BD ring len is illegal */
	if (uec_info->tx_bd_ring_len < UEC_TX_BD_RING_SIZE_MIN) {
		printf("%s: Tx BD ring length must not be smaller than 2.\n",
			 __FUNCTION__);
		return -EINVAL;
	}

	/* Check if MRBLR is illegal */
	if ((MAX_RXBUF_LEN == 0) || (MAX_RXBUF_LEN  % UEC_MRBLR_ALIGNMENT)) {
		printf("%s: max rx buffer length must be mutliple of 128.\n",
			 __FUNCTION__);
		return -EINVAL;
	}

	/* Both Rx and Tx are stopped */
	uec->grace_stopped_rx = 1;
	uec->grace_stopped_tx = 1;

	/* Init UCC fast */
	if (ucc_fast_init(uf_info, &uccf)) {
		printf("%s: failed to init ucc fast\n", __FUNCTION__);
		return -ENOMEM;
	}

	/* Save uccf */
	uec->uccf = uccf;

	/* Convert the Tx threads number */
	if (uec_convert_threads_num(uec_info->num_threads_tx,
					 &num_threads_tx)) {
		return -EINVAL;
	}

	/* Convert the Rx threads number */
	if (uec_convert_threads_num(uec_info->num_threads_rx,
					 &num_threads_rx)) {
		return -EINVAL;
	}

	uf_regs = uccf->uf_regs;

	/* UEC register is following UCC fast registers */
	uec_regs = (uec_t *)(&uf_regs->ucc_eth);

	/* Save the UEC register pointer to UEC private struct */
	uec->uec_regs = uec_regs;

	/* Init UPSMR, enable hardware statistics (UCC) */
	out_be32(&uec->uccf->uf_regs->upsmr, UPSMR_INIT_VALUE);

	/* Init MACCFG1, flow control disable, disable Tx and Rx */
	out_be32(&uec_regs->maccfg1, MACCFG1_INIT_VALUE);

	/* Init MACCFG2, length check, MAC PAD and CRC enable */
	out_be32(&uec_regs->maccfg2, MACCFG2_INIT_VALUE);

	/* Setup MAC interface mode */
	uec_set_mac_if_mode(uec, uec_info->enet_interface);

	/* Setup MII management base */
#ifndef CONFIG_eTSEC_MDIO_BUS
	uec->uec_mii_regs = (uec_mii_t *)(&uec_regs->miimcfg);
#else
	uec->uec_mii_regs = (uec_mii_t *) CONFIG_MIIM_ADDRESS;
#endif

	/* Setup MII master clock source */
	qe_set_mii_clk_src(uec_info->uf_info.ucc_num);

	/* Setup UTBIPAR */
	utbipar = in_be32(&uec_regs->utbipar);
	utbipar &= ~UTBIPAR_PHY_ADDRESS_MASK;
	enet_interface = uec->uec_info->enet_interface;
	if (enet_interface == ENET_1000_TBI ||
		 enet_interface == ENET_1000_RTBI) {
		utbipar |=  (uec_info->phy_address + uec_info->uf_info.ucc_num)
						 << UTBIPAR_PHY_ADDRESS_SHIFT;
	} else {
		utbipar |=  (0x10 + uec_info->uf_info.ucc_num)
						 << UTBIPAR_PHY_ADDRESS_SHIFT;
	}

	out_be32(&uec_regs->utbipar, utbipar);

	/* Allocate Tx BDs */
	length = ((uec_info->tx_bd_ring_len * SIZEOFBD) /
		 UEC_TX_BD_RING_SIZE_MEMORY_ALIGNMENT) *
		 UEC_TX_BD_RING_SIZE_MEMORY_ALIGNMENT;
	if ((uec_info->tx_bd_ring_len * SIZEOFBD) %
		 UEC_TX_BD_RING_SIZE_MEMORY_ALIGNMENT) {
		length += UEC_TX_BD_RING_SIZE_MEMORY_ALIGNMENT;
	}

	align = UEC_TX_BD_RING_ALIGNMENT;
	uec->tx_bd_ring_offset = (u32)malloc((u32)(length + align));
	if (uec->tx_bd_ring_offset != 0) {
		uec->p_tx_bd_ring = (u8 *)((uec->tx_bd_ring_offset + align)
						 & ~(align - 1));
	}

	/* Zero all of Tx BDs */
	memset((void *)(uec->tx_bd_ring_offset), 0, length + align);

	/* Allocate Rx BDs */
	length = uec_info->rx_bd_ring_len * SIZEOFBD;
	align = UEC_RX_BD_RING_ALIGNMENT;
	uec->rx_bd_ring_offset = (u32)(malloc((u32)(length + align)));
	if (uec->rx_bd_ring_offset != 0) {
		uec->p_rx_bd_ring = (u8 *)((uec->rx_bd_ring_offset + align)
							 & ~(align - 1));
	}

	/* Zero all of Rx BDs */
	memset((void *)(uec->rx_bd_ring_offset), 0, length + align);

	/* Allocate Rx buffer */
	length = uec_info->rx_bd_ring_len * MAX_RXBUF_LEN;
	align = UEC_RX_DATA_BUF_ALIGNMENT;
	uec->rx_buf_offset = (u32)malloc(length + align);
	if (uec->rx_buf_offset != 0) {
		uec->p_rx_buf = (u8 *)((uec->rx_buf_offset + align)
						 & ~(align - 1));
	}

	/* Zero all of the Rx buffer */
	memset((void *)(uec->rx_buf_offset), 0, length + align);

	/* Init TxBD ring */
	bd = (qe_bd_t *)uec->p_tx_bd_ring;
	uec->txBd = bd;

	for (i = 0; i < uec_info->tx_bd_ring_len; i++) {
		BD_DATA_CLEAR(bd);
		BD_STATUS_SET(bd, 0);
		BD_LENGTH_SET(bd, 0);
		bd ++;
	}
	BD_STATUS_SET((--bd), TxBD_WRAP);

	/* Init RxBD ring */
	bd = (qe_bd_t *)uec->p_rx_bd_ring;
	uec->rxBd = bd;
	buf = uec->p_rx_buf;
	for (i = 0; i < uec_info->rx_bd_ring_len; i++) {
		BD_DATA_SET(bd, buf);
		BD_LENGTH_SET(bd, 0);
		BD_STATUS_SET(bd, RxBD_EMPTY);
		buf += MAX_RXBUF_LEN;
		bd ++;
	}
	BD_STATUS_SET((--bd), RxBD_WRAP | RxBD_EMPTY);

	/* Init global Tx parameter RAM */
	uec_init_tx_parameter(uec, num_threads_tx);

	/* Init global Rx parameter RAM */
	uec_init_rx_parameter(uec, num_threads_rx);

	/* Init ethernet Tx and Rx parameter command */
	if (uec_issue_init_enet_rxtx_cmd(uec, num_threads_tx,
					 num_threads_rx)) {
		printf("%s issue init enet cmd failed\n", __FUNCTION__);
		return -ENOMEM;
	}

	return 0;
}

static int uec_init(struct eth_device* dev, bd_t *bd)
{
	uec_private_t		*uec;
	int			err;

	uec = (uec_private_t *)dev->priv;

	if (uec->the_first_run == 0) {
		/* Set up the MAC address */
		if (dev->enetaddr[0] & 0x01) {
			printf("%s: MacAddress is multcast address\n",
				 __FUNCTION__);
			return 0;
		}
		uec_set_mac_address(uec, dev->enetaddr);
		uec->the_first_run = 1;
	}

	err = uec_open(uec, COMM_DIR_RX_AND_TX);
	if (err) {
		printf("%s: cannot enable UEC device\n", dev->name);
		return 0;
	}

	return uec->mii_info->link;
}

static void uec_halt(struct eth_device* dev)
{
	uec_private_t	*uec = (uec_private_t *)dev->priv;
	uec_stop(uec, COMM_DIR_RX_AND_TX);
}

static int uec_send(struct eth_device* dev, volatile void *buf, int len)
{
	uec_private_t		*uec;
	ucc_fast_private_t	*uccf;
	volatile qe_bd_t	*bd;
	u16			status;
	int			i;
	int			result = 0;

	uec = (uec_private_t *)dev->priv;
	uccf = uec->uccf;
	bd = uec->txBd;

	/* Find an empty TxBD */
	for (i = 0; bd->status & TxBD_READY; i++) {
		if (i > 0x100000) {
			printf("%s: tx buffer not ready\n", dev->name);
			return result;
		}
	}

	/* Init TxBD */
	BD_DATA_SET(bd, buf);
	BD_LENGTH_SET(bd, len);
	status = bd->status;
	status &= BD_WRAP;
	status |= (TxBD_READY | TxBD_LAST);
	BD_STATUS_SET(bd, status);

	/* Tell UCC to transmit the buffer */
	ucc_fast_transmit_on_demand(uccf);

	/* Wait for buffer to be transmitted */
	for (i = 0; bd->status & TxBD_READY; i++) {
		if (i > 0x100000) {
			printf("%s: tx error\n", dev->name);
			return result;
		}
	}

	/* Ok, the buffer be transimitted */
	BD_ADVANCE(bd, status, uec->p_tx_bd_ring);
	uec->txBd = bd;
	result = 1;

	return result;
}

static int uec_recv(struct eth_device* dev)
{
	uec_private_t		*uec = dev->priv;
	volatile qe_bd_t	*bd;
	u16			status;
	u16			len;
	u8			*data;

	bd = uec->rxBd;
	status = bd->status;

	while (!(status & RxBD_EMPTY)) {
		if (!(status & RxBD_ERROR)) {
			data = BD_DATA(bd);
			len = BD_LENGTH(bd);
			NetReceive(data, len);
		} else {
			printf("%s: Rx error\n", dev->name);
		}
		status &= BD_CLEAN;
		BD_LENGTH_SET(bd, 0);
		BD_STATUS_SET(bd, status | RxBD_EMPTY);
		BD_ADVANCE(bd, status, uec->p_rx_bd_ring);
		status = bd->status;
	}
	uec->rxBd = bd;

	return 1;
}

int uec_initialize(int index)
{
	struct eth_device	*dev;
	int			i;
	uec_private_t		*uec;
	uec_info_t		*uec_info;
	int			err;

	dev = (struct eth_device *)malloc(sizeof(struct eth_device));
	if (!dev)
		return 0;
	memset(dev, 0, sizeof(struct eth_device));

	/* Allocate the UEC private struct */
	uec = (uec_private_t *)malloc(sizeof(uec_private_t));
	if (!uec) {
		return -ENOMEM;
	}
	memset(uec, 0, sizeof(uec_private_t));

	/* Init UEC private struct, they come from board.h */
	if (index == 0) {
#ifdef CONFIG_UEC_ETH1
		uec_info = &eth1_uec_info;
#endif
	} else if (index == 1) {
#ifdef CONFIG_UEC_ETH2
		uec_info = &eth2_uec_info;
#endif
	} else {
		printf("%s: index is illegal.\n", __FUNCTION__);
		return -EINVAL;
	}

	uec->uec_info = uec_info;

	sprintf(dev->name, "FSL UEC%d", index);
	dev->iobase = 0;
	dev->priv = (void *)uec;
	dev->init = uec_init;
	dev->halt = uec_halt;
	dev->send = uec_send;
	dev->recv = uec_recv;

	/* Clear the ethnet address */
	for (i = 0; i < 6; i++)
		dev->enetaddr[i] = 0;

	eth_register(dev);

	err = uec_startup(uec);
	if (err) {
		printf("%s: Cannot configure net device, aborting.",dev->name);
		return err;
	}

	err = init_phy(dev);
	if (err) {
		printf("%s: Cannot initialize PHY, aborting.\n", dev->name);
		return err;
	}

	phy_change(dev);

	return 1;
}
#endif /* CONFIG_QE */