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path: root/drivers/net/fm/eth.c
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/*
 * Copyright 2009-2011 Freescale Semiconductor, Inc.
 *	Dave Liu <daveliu@freescale.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */
#include <common.h>
#include <asm/io.h>
#include <malloc.h>
#include <net.h>
#include <hwconfig.h>
#include <fm_eth.h>
#include <fsl_mdio.h>
#include <miiphy.h>
#include <phy.h>
#include <asm/fsl_dtsec.h>
#include <asm/fsl_tgec.h>

#include "fm.h"

static struct eth_device *devlist[NUM_FM_PORTS];
static int num_controllers;

#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) && !defined(BITBANGMII)

#define TBIANA_SETTINGS (TBIANA_ASYMMETRIC_PAUSE | TBIANA_SYMMETRIC_PAUSE | \
			 TBIANA_FULL_DUPLEX)

#define TBIANA_SGMII_ACK 0x4001

#define TBICR_SETTINGS (TBICR_ANEG_ENABLE | TBICR_RESTART_ANEG | \
			TBICR_FULL_DUPLEX | TBICR_SPEED1_SET)

/* Configure the TBI for SGMII operation */
void dtsec_configure_serdes(struct fm_eth *priv)
{
	struct dtsec *regs = priv->mac->base;
	struct tsec_mii_mng *phyregs = priv->mac->phyregs;

	/*
	 * Access TBI PHY registers at given TSEC register offset as
	 * opposed to the register offset used for external PHY accesses
	 */
	tsec_local_mdio_write(phyregs, in_be32(&regs->tbipa), 0, TBI_TBICON,
			TBICON_CLK_SELECT);
	tsec_local_mdio_write(phyregs, in_be32(&regs->tbipa), 0, TBI_ANA,
			TBIANA_SGMII_ACK);
	tsec_local_mdio_write(phyregs, in_be32(&regs->tbipa), 0,
			TBI_CR, TBICR_SETTINGS);
}

static void dtsec_init_phy(struct eth_device *dev)
{
	struct fm_eth *fm_eth = dev->priv;
	struct dtsec *regs = (struct dtsec *)fm_eth->mac->base;

	/* Assign a Physical address to the TBI */
	out_be32(&regs->tbipa, CONFIG_SYS_TBIPA_VALUE);

	if (fm_eth->enet_if == PHY_INTERFACE_MODE_SGMII)
		dtsec_configure_serdes(fm_eth);
}

static int tgec_is_fibre(struct eth_device *dev)
{
	struct fm_eth *fm = dev->priv;
	char phyopt[20];

	sprintf(phyopt, "fsl_fm%d_xaui_phy", fm->fm_index + 1);

	return hwconfig_arg_cmp(phyopt, "xfi");
}
#endif

static u16 muram_readw(u16 *addr)
{
	u32 base = (u32)addr & ~0x3;
	u32 val32 = *(u32 *)base;
	int byte_pos;
	u16 ret;

	byte_pos = (u32)addr & 0x3;
	if (byte_pos)
		ret = (u16)(val32 & 0x0000ffff);
	else
		ret = (u16)((val32 & 0xffff0000) >> 16);

	return ret;
}

static void muram_writew(u16 *addr, u16 val)
{
	u32 base = (u32)addr & ~0x3;
	u32 org32 = *(u32 *)base;
	u32 val32;
	int byte_pos;

	byte_pos = (u32)addr & 0x3;
	if (byte_pos)
		val32 = (org32 & 0xffff0000) | val;
	else
		val32 = (org32 & 0x0000ffff) | ((u32)val << 16);

	*(u32 *)base = val32;
}

static void bmi_rx_port_disable(struct fm_bmi_rx_port *rx_port)
{
	int timeout = 1000000;

	clrbits_be32(&rx_port->fmbm_rcfg, FMBM_RCFG_EN);

	/* wait until the rx port is not busy */
	while ((in_be32(&rx_port->fmbm_rst) & FMBM_RST_BSY) && timeout--)
		;
}

static void bmi_rx_port_init(struct fm_bmi_rx_port *rx_port)
{
	/* set BMI to independent mode, Rx port disable */
	out_be32(&rx_port->fmbm_rcfg, FMBM_RCFG_IM);
	/* clear FOF in IM case */
	out_be32(&rx_port->fmbm_rim, 0);
	/* Rx frame next engine -RISC */
	out_be32(&rx_port->fmbm_rfne, NIA_ENG_RISC | NIA_RISC_AC_IM_RX);
	/* Rx command attribute - no order, MR[3] = 1 */
	clrbits_be32(&rx_port->fmbm_rfca, FMBM_RFCA_ORDER | FMBM_RFCA_MR_MASK);
	setbits_be32(&rx_port->fmbm_rfca, FMBM_RFCA_MR(4));
	/* enable Rx statistic counters */
	out_be32(&rx_port->fmbm_rstc, FMBM_RSTC_EN);
	/* disable Rx performance counters */
	out_be32(&rx_port->fmbm_rpc, 0);
}

static void bmi_tx_port_disable(struct fm_bmi_tx_port *tx_port)
{
	int timeout = 1000000;

	clrbits_be32(&tx_port->fmbm_tcfg, FMBM_TCFG_EN);

	/* wait until the tx port is not busy */
	while ((in_be32(&tx_port->fmbm_tst) & FMBM_TST_BSY) && timeout--)
		;
}

static void bmi_tx_port_init(struct fm_bmi_tx_port *tx_port)
{
	/* set BMI to independent mode, Tx port disable */
	out_be32(&tx_port->fmbm_tcfg, FMBM_TCFG_IM);
	/* Tx frame next engine -RISC */
	out_be32(&tx_port->fmbm_tfne, NIA_ENG_RISC | NIA_RISC_AC_IM_TX);
	out_be32(&tx_port->fmbm_tfene, NIA_ENG_RISC | NIA_RISC_AC_IM_TX);
	/* Tx command attribute - no order, MR[3] = 1 */
	clrbits_be32(&tx_port->fmbm_tfca, FMBM_TFCA_ORDER | FMBM_TFCA_MR_MASK);
	setbits_be32(&tx_port->fmbm_tfca, FMBM_TFCA_MR(4));
	/* enable Tx statistic counters */
	out_be32(&tx_port->fmbm_tstc, FMBM_TSTC_EN);
	/* disable Tx performance counters */
	out_be32(&tx_port->fmbm_tpc, 0);
}

static int fm_eth_rx_port_parameter_init(struct fm_eth *fm_eth)
{
	struct fm_port_global_pram *pram;
	u32 pram_page_offset;
	void *rx_bd_ring_base;
	void *rx_buf_pool;
	struct fm_port_bd *rxbd;
	struct fm_port_qd *rxqd;
	struct fm_bmi_rx_port *bmi_rx_port = fm_eth->rx_port;
	int i;

	/* alloc global parameter ram at MURAM */
	pram = (struct fm_port_global_pram *)fm_muram_alloc(fm_eth->fm_index,
		FM_PRAM_SIZE, FM_PRAM_ALIGN);
	fm_eth->rx_pram = pram;

	/* parameter page offset to MURAM */
	pram_page_offset = (u32)pram - fm_muram_base(fm_eth->fm_index);

	/* enable global mode- snooping data buffers and BDs */
	pram->mode = PRAM_MODE_GLOBAL;

	/* init the Rx queue descriptor pionter */
	pram->rxqd_ptr = pram_page_offset + 0x20;

	/* set the max receive buffer length, power of 2 */
	muram_writew(&pram->mrblr, MAX_RXBUF_LOG2);

	/* alloc Rx buffer descriptors from main memory */
	rx_bd_ring_base = malloc(sizeof(struct fm_port_bd)
			* RX_BD_RING_SIZE);
	if (!rx_bd_ring_base)
		return 0;
	memset(rx_bd_ring_base, 0, sizeof(struct fm_port_bd)
			* RX_BD_RING_SIZE);

	/* alloc Rx buffer from main memory */
	rx_buf_pool = malloc(MAX_RXBUF_LEN * RX_BD_RING_SIZE);
	if (!rx_buf_pool)
		return 0;
	memset(rx_buf_pool, 0, MAX_RXBUF_LEN * RX_BD_RING_SIZE);

	/* save them to fm_eth */
	fm_eth->rx_bd_ring = rx_bd_ring_base;
	fm_eth->cur_rxbd = rx_bd_ring_base;
	fm_eth->rx_buf = rx_buf_pool;

	/* init Rx BDs ring */
	rxbd = (struct fm_port_bd *)rx_bd_ring_base;
	for (i = 0; i < RX_BD_RING_SIZE; i++) {
		rxbd->status = RxBD_EMPTY;
		rxbd->len = 0;
		rxbd->buf_ptr_hi = 0;
		rxbd->buf_ptr_lo = (u32)rx_buf_pool + i * MAX_RXBUF_LEN;
		rxbd++;
	}

	/* set the Rx queue descriptor */
	rxqd = &pram->rxqd;
	muram_writew(&rxqd->gen, 0);
	muram_writew(&rxqd->bd_ring_base_hi, 0);
	rxqd->bd_ring_base_lo = (u32)rx_bd_ring_base;
	muram_writew(&rxqd->bd_ring_size, sizeof(struct fm_port_bd)
			* RX_BD_RING_SIZE);
	muram_writew(&rxqd->offset_in, 0);
	muram_writew(&rxqd->offset_out, 0);

	/* set IM parameter ram pointer to Rx Frame Queue ID */
	out_be32(&bmi_rx_port->fmbm_rfqid, pram_page_offset);

	return 1;
}

static int fm_eth_tx_port_parameter_init(struct fm_eth *fm_eth)
{
	struct fm_port_global_pram *pram;
	u32 pram_page_offset;
	void *tx_bd_ring_base;
	struct fm_port_bd *txbd;
	struct fm_port_qd *txqd;
	struct fm_bmi_tx_port *bmi_tx_port = fm_eth->tx_port;
	int i;

	/* alloc global parameter ram at MURAM */
	pram = (struct fm_port_global_pram *)fm_muram_alloc(fm_eth->fm_index,
		FM_PRAM_SIZE, FM_PRAM_ALIGN);
	fm_eth->tx_pram = pram;

	/* parameter page offset to MURAM */
	pram_page_offset = (u32)pram - fm_muram_base(fm_eth->fm_index);

	/* enable global mode- snooping data buffers and BDs */
	pram->mode = PRAM_MODE_GLOBAL;

	/* init the Tx queue descriptor pionter */
	pram->txqd_ptr = pram_page_offset + 0x40;

	/* alloc Tx buffer descriptors from main memory */
	tx_bd_ring_base = malloc(sizeof(struct fm_port_bd)
			* TX_BD_RING_SIZE);
	if (!tx_bd_ring_base)
		return 0;
	memset(tx_bd_ring_base, 0, sizeof(struct fm_port_bd)
			* TX_BD_RING_SIZE);
	/* save it to fm_eth */
	fm_eth->tx_bd_ring = tx_bd_ring_base;
	fm_eth->cur_txbd = tx_bd_ring_base;

	/* init Tx BDs ring */
	txbd = (struct fm_port_bd *)tx_bd_ring_base;
	for (i = 0; i < TX_BD_RING_SIZE; i++) {
		txbd->status = TxBD_LAST;
		txbd->len = 0;
		txbd->buf_ptr_hi = 0;
		txbd->buf_ptr_lo = 0;
	}

	/* set the Tx queue decriptor */
	txqd = &pram->txqd;
	muram_writew(&txqd->bd_ring_base_hi, 0);
	txqd->bd_ring_base_lo = (u32)tx_bd_ring_base;
	muram_writew(&txqd->bd_ring_size, sizeof(struct fm_port_bd)
			* TX_BD_RING_SIZE);
	muram_writew(&txqd->offset_in, 0);
	muram_writew(&txqd->offset_out, 0);

	/* set IM parameter ram pointer to Tx Confirmation Frame Queue ID */
	out_be32(&bmi_tx_port->fmbm_tcfqid, pram_page_offset);

	return 1;
}

static int fm_eth_init(struct fm_eth *fm_eth)
{

	if (!fm_eth_rx_port_parameter_init(fm_eth))
		return 0;

	if (!fm_eth_tx_port_parameter_init(fm_eth))
		return 0;

	return 1;
}

static int fm_eth_startup(struct fm_eth *fm_eth)
{
	struct fsl_enet_mac *mac;
	mac = fm_eth->mac;

	/* Rx/TxBDs, Rx/TxQDs, Rx buff and parameter ram init */
	if (!fm_eth_init(fm_eth))
		return 0;
	/* setup the MAC controller */
	mac->init_mac(mac);

	/* For some reason we need to set SPEED_100 */
	if ((fm_eth->enet_if == PHY_INTERFACE_MODE_SGMII) && mac->set_if_mode)
		mac->set_if_mode(mac, fm_eth->enet_if, SPEED_100);

	/* init bmi rx port, IM mode and disable */
	bmi_rx_port_init(fm_eth->rx_port);
	/* init bmi tx port, IM mode and disable */
	bmi_tx_port_init(fm_eth->tx_port);

	return 1;
}

static void fmc_tx_port_graceful_stop_enable(struct fm_eth *fm_eth)
{
	struct fm_port_global_pram *pram;

	pram = fm_eth->tx_pram;
	/* graceful stop transmission of frames */
	pram->mode |= PRAM_MODE_GRACEFUL_STOP;
	sync();
}

static void fmc_tx_port_graceful_stop_disable(struct fm_eth *fm_eth)
{
	struct fm_port_global_pram *pram;

	pram = fm_eth->tx_pram;
	/* re-enable transmission of frames */
	pram->mode &= ~PRAM_MODE_GRACEFUL_STOP;
	sync();
}

static int fm_eth_open(struct eth_device *dev, bd_t *bd)
{
	struct fm_eth *fm_eth;
	struct fsl_enet_mac *mac;
#ifdef CONFIG_PHYLIB
	int ret;
#endif

	fm_eth = (struct fm_eth *)dev->priv;
	mac = fm_eth->mac;

	/* setup the MAC address */
	if (dev->enetaddr[0] & 0x01) {
		printf("%s: MacAddress is multcast address\n",	__func__);
		return 1;
	}
	mac->set_mac_addr(mac, dev->enetaddr);

	/* enable bmi Rx port */
	setbits_be32(&fm_eth->rx_port->fmbm_rcfg, FMBM_RCFG_EN);
	/* enable MAC rx/tx port */
	mac->enable_mac(mac);
	/* enable bmi Tx port */
	setbits_be32(&fm_eth->tx_port->fmbm_tcfg, FMBM_TCFG_EN);
	/* re-enable transmission of frame */
	fmc_tx_port_graceful_stop_disable(fm_eth);

#ifdef CONFIG_PHYLIB
	ret = phy_startup(fm_eth->phydev);
	if (ret) {
		printf("%s: Could not initialize\n", fm_eth->phydev->dev->name);
		return ret;
	}
#else
	fm_eth->phydev->speed = SPEED_1000;
	fm_eth->phydev->link = 1;
	fm_eth->phydev->duplex = DUPLEX_FULL;
#endif

	/* set the MAC-PHY mode */
	mac->set_if_mode(mac, fm_eth->enet_if, fm_eth->phydev->speed);

	if (!fm_eth->phydev->link)
		printf("%s: No link.\n", fm_eth->phydev->dev->name);

	return fm_eth->phydev->link ? 0 : -1;
}

static void fm_eth_halt(struct eth_device *dev)
{
	struct fm_eth *fm_eth;
	struct fsl_enet_mac *mac;

	fm_eth = (struct fm_eth *)dev->priv;
	mac = fm_eth->mac;

	/* graceful stop the transmission of frames */
	fmc_tx_port_graceful_stop_enable(fm_eth);
	/* disable bmi Tx port */
	bmi_tx_port_disable(fm_eth->tx_port);
	/* disable MAC rx/tx port */
	mac->disable_mac(mac);
	/* disable bmi Rx port */
	bmi_rx_port_disable(fm_eth->rx_port);

	phy_shutdown(fm_eth->phydev);
}

static int fm_eth_send(struct eth_device *dev, void *buf, int len)
{
	struct fm_eth *fm_eth;
	struct fm_port_global_pram *pram;
	struct fm_port_bd *txbd, *txbd_base;
	u16 offset_in;
	int i;

	fm_eth = (struct fm_eth *)dev->priv;
	pram = fm_eth->tx_pram;
	txbd = fm_eth->cur_txbd;

	/* find one empty TxBD */
	for (i = 0; txbd->status & TxBD_READY; i++) {
		udelay(100);
		if (i > 0x1000) {
			printf("%s: Tx buffer not ready\n", dev->name);
			return 0;
		}
	}
	/* setup TxBD */
	txbd->buf_ptr_hi = 0;
	txbd->buf_ptr_lo = (u32)buf;
	txbd->len = len;
	sync();
	txbd->status = TxBD_READY | TxBD_LAST;
	sync();

	/* update TxQD, let RISC to send the packet */
	offset_in = muram_readw(&pram->txqd.offset_in);
	offset_in += sizeof(struct fm_port_bd);
	if (offset_in >= muram_readw(&pram->txqd.bd_ring_size))
		offset_in = 0;
	muram_writew(&pram->txqd.offset_in, offset_in);
	sync();

	/* wait for buffer to be transmitted */
	for (i = 0; txbd->status & TxBD_READY; i++) {
		udelay(100);
		if (i > 0x10000) {
			printf("%s: Tx error\n", dev->name);
			return 0;
		}
	}

	/* advance the TxBD */
	txbd++;
	txbd_base = (struct fm_port_bd *)fm_eth->tx_bd_ring;
	if (txbd >= (txbd_base + TX_BD_RING_SIZE))
		txbd = txbd_base;
	/* update current txbd */
	fm_eth->cur_txbd = (void *)txbd;

	return 1;
}

static int fm_eth_recv(struct eth_device *dev)
{
	struct fm_eth *fm_eth;
	struct fm_port_global_pram *pram;
	struct fm_port_bd *rxbd, *rxbd_base;
	u16 status, len;
	u8 *data;
	u16 offset_out;

	fm_eth = (struct fm_eth *)dev->priv;
	pram = fm_eth->rx_pram;
	rxbd = fm_eth->cur_rxbd;
	status = rxbd->status;

	while (!(status & RxBD_EMPTY)) {
		if (!(status & RxBD_ERROR)) {
			data = (u8 *)rxbd->buf_ptr_lo;
			len = rxbd->len;
			NetReceive(data, len);
		} else {
			printf("%s: Rx error\n", dev->name);
			return 0;
		}

		/* clear the RxBDs */
		rxbd->status = RxBD_EMPTY;
		rxbd->len = 0;
		sync();

		/* advance RxBD */
		rxbd++;
		rxbd_base = (struct fm_port_bd *)fm_eth->rx_bd_ring;
		if (rxbd >= (rxbd_base + RX_BD_RING_SIZE))
			rxbd = rxbd_base;
		/* read next status */
		status = rxbd->status;

		/* update RxQD */
		offset_out = muram_readw(&pram->rxqd.offset_out);
		offset_out += sizeof(struct fm_port_bd);
		if (offset_out >= muram_readw(&pram->rxqd.bd_ring_size))
			offset_out = 0;
		muram_writew(&pram->rxqd.offset_out, offset_out);
		sync();
	}
	fm_eth->cur_rxbd = (void *)rxbd;

	return 1;
}

static int fm_eth_init_mac(struct fm_eth *fm_eth, struct ccsr_fman *reg)
{
	struct fsl_enet_mac *mac;
	int num;
	void *base, *phyregs = NULL;

	num = fm_eth->num;

	/* Get the mac registers base address */
	if (fm_eth->type == FM_ETH_1G_E) {
		base = &reg->mac_1g[num].fm_dtesc;
		phyregs = &reg->mac_1g[num].fm_mdio.miimcfg;
	} else {
		base = &reg->mac_10g[num].fm_10gec;
		phyregs = &reg->mac_10g[num].fm_10gec_mdio;
	}

	/* alloc mac controller */
	mac = malloc(sizeof(struct fsl_enet_mac));
	if (!mac)
		return 0;
	memset(mac, 0, sizeof(struct fsl_enet_mac));

	/* save the mac to fm_eth struct */
	fm_eth->mac = mac;

	if (fm_eth->type == FM_ETH_1G_E)
		init_dtsec(mac, base, phyregs, MAX_RXBUF_LEN);
	else
		init_tgec(mac, base, phyregs, MAX_RXBUF_LEN);

	return 1;
}

static int init_phy(struct eth_device *dev)
{
	struct fm_eth *fm_eth = dev->priv;
	struct phy_device *phydev = NULL;
	u32 supported;

#ifdef CONFIG_PHYLIB
	if (fm_eth->type == FM_ETH_1G_E)
		dtsec_init_phy(dev);

	if (fm_eth->bus) {
		phydev = phy_connect(fm_eth->bus, fm_eth->phyaddr, dev,
					fm_eth->enet_if);
	}

	if (!phydev) {
		printf("Failed to connect\n");
		return -1;
	}

	if (fm_eth->type == FM_ETH_1G_E) {
		supported = (SUPPORTED_10baseT_Half |
				SUPPORTED_10baseT_Full |
				SUPPORTED_100baseT_Half |
				SUPPORTED_100baseT_Full |
				SUPPORTED_1000baseT_Full);
	} else {
		supported = SUPPORTED_10000baseT_Full;

		if (tgec_is_fibre(dev))
			phydev->port = PORT_FIBRE;
	}

	phydev->supported &= supported;
	phydev->advertising = phydev->supported;

	fm_eth->phydev = phydev;

	phy_config(phydev);
#endif

	return 0;
}

int fm_eth_initialize(struct ccsr_fman *reg, struct fm_eth_info *info)
{
	struct eth_device *dev;
	struct fm_eth *fm_eth;
	int i, num = info->num;

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

	/* alloc the FMan ethernet private struct */
	fm_eth = (struct fm_eth *)malloc(sizeof(struct fm_eth));
	if (!fm_eth)
		return 0;
	memset(fm_eth, 0, sizeof(struct fm_eth));

	/* save off some things we need from the info struct */
	fm_eth->fm_index = info->index - 1; /* keep as 0 based for muram */
	fm_eth->num = num;
	fm_eth->type = info->type;

	fm_eth->rx_port = (void *)&reg->port[info->rx_port_id - 1].fm_bmi;
	fm_eth->tx_port = (void *)&reg->port[info->tx_port_id - 1].fm_bmi;

	/* set the ethernet max receive length */
	fm_eth->max_rx_len = MAX_RXBUF_LEN;

	/* init global mac structure */
	if (!fm_eth_init_mac(fm_eth, reg))
		return 0;

	/* keep same as the manual, we call FMAN1, FMAN2, DTSEC1, DTSEC2, etc */
	if (fm_eth->type == FM_ETH_1G_E)
		sprintf(dev->name, "FM%d@DTSEC%d", info->index, num + 1);
	else
		sprintf(dev->name, "FM%d@TGEC%d", info->index, num + 1);

	devlist[num_controllers++] = dev;
	dev->iobase = 0;
	dev->priv = (void *)fm_eth;
	dev->init = fm_eth_open;
	dev->halt = fm_eth_halt;
	dev->send = fm_eth_send;
	dev->recv = fm_eth_recv;
	fm_eth->dev = dev;
	fm_eth->bus = info->bus;
	fm_eth->phyaddr = info->phy_addr;
	fm_eth->enet_if = info->enet_if;

	/* startup the FM im */
	if (!fm_eth_startup(fm_eth))
		return 0;

	if (init_phy(dev))
		return 0;

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

	return 1;
}