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dnet: driver for Dave DNET ethernet controller

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Driver for Dave DNET ethernet controller (used on Dave/DENX
QongEVB-LITE board).

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Acked-by: Ben Warren <biggerbadderben@gmail.com>
master
Ilya Yanok 16 years ago committed by Jean-Christophe PLAGNIOL-VILLARD
parent 54dc517328
commit 62cbc408f5
4 changed files with 564 additions and 0 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 1
      drivers/net/Makefile
  2. 396
      drivers/net/dnet.c
  3. 166
      drivers/net/dnet.h
  4. 1
      include/netdev.h

1
drivers/net/Makefile
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@ -33,6 +33,7 @@ COBJS-$(CONFIG_BFIN_MAC) += bfin_mac.o
COBJS-$(CONFIG_DRIVER_CS8900) += cs8900.o
COBJS-$(CONFIG_TULIP) += dc2114x.o
COBJS-$(CONFIG_DRIVER_DM9000) += dm9000x.o
COBJS-$(CONFIG_DNET) += dnet.o
COBJS-$(CONFIG_E1000) += e1000.o
COBJS-$(CONFIG_EEPRO100) += eepro100.o
COBJS-$(CONFIG_ENC28J60) += enc28j60.o

396
drivers/net/dnet.c
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@ -0,0 +1,396 @@
/*
* Dave Ethernet Controller driver
*
* Copyright (C) 2008 Dave S.r.l. <www.dave.eu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <common.h>
#ifndef CONFIG_DNET_AUTONEG_TIMEOUT
#define CONFIG_DNET_AUTONEG_TIMEOUT 5000000 /* default value */
#endif
#include <net.h>
#include <malloc.h>
#include <linux/mii.h>
#include <miiphy.h>
#include <asm/io.h>
#include "dnet.h"
struct dnet_device {
struct dnet_registers *regs;
const struct device *dev;
struct eth_device netdev;
unsigned short phy_addr;
};
/* get struct dnet_device from given struct netdev */
#define to_dnet(_nd) container_of(_nd, struct dnet_device, netdev)
/* function for reading internal MAC register */
u16 dnet_readw_mac(struct dnet_device *dnet, u16 reg)
{
u16 data_read;
/* issue a read */
writel(reg, &dnet->regs->MACREG_ADDR);
/* since a read/write op to the MAC is very slow,
* we must wait before reading the data */
udelay(1);
/* read data read from the MAC register */
data_read = readl(&dnet->regs->MACREG_DATA);
/* all done */
return data_read;
}
/* function for writing internal MAC register */
void dnet_writew_mac(struct dnet_device *dnet, u16 reg, u16 val)
{
/* load data to write */
writel(val, &dnet->regs->MACREG_DATA);
/* issue a write */
writel(reg | DNET_INTERNAL_WRITE, &dnet->regs->MACREG_ADDR);
/* since a read/write op to the MAC is very slow,
* we must wait before exiting */
udelay(1);
}
static void dnet_mdio_write(struct dnet_device *dnet, u8 reg, u16 value)
{
u16 tmp;
debug(DRIVERNAME "dnet_mdio_write %02x:%02x <- %04x\n",
dnet->phy_addr, reg, value);
while (!(dnet_readw_mac(dnet, DNET_INTERNAL_GMII_MNG_CTL_REG) &
DNET_INTERNAL_GMII_MNG_CMD_FIN))
;
/* prepare for a write operation */
tmp = (1 << 13);
/* only 5 bits allowed for register offset */
reg &= 0x1f;
/* prepare reg_value for a write */
tmp |= (dnet->phy_addr << 8);
tmp |= reg;
/* write data to write first */
dnet_writew_mac(dnet, DNET_INTERNAL_GMII_MNG_DAT_REG, value);
/* write control word */
dnet_writew_mac(dnet, DNET_INTERNAL_GMII_MNG_CTL_REG, tmp);
while (!(dnet_readw_mac(dnet, DNET_INTERNAL_GMII_MNG_CTL_REG) &
DNET_INTERNAL_GMII_MNG_CMD_FIN))
;
}
static u16 dnet_mdio_read(struct dnet_device *dnet, u8 reg)
{
u16 value;
while (!(dnet_readw_mac(dnet, DNET_INTERNAL_GMII_MNG_CTL_REG) &
DNET_INTERNAL_GMII_MNG_CMD_FIN))
;
/* only 5 bits allowed for register offset*/
reg &= 0x1f;
/* prepare reg_value for a read */
value = (dnet->phy_addr << 8);
value |= reg;
/* write control word */
dnet_writew_mac(dnet, DNET_INTERNAL_GMII_MNG_CTL_REG, value);
/* wait for end of transfer */
while (!(dnet_readw_mac(dnet, DNET_INTERNAL_GMII_MNG_CTL_REG) &
DNET_INTERNAL_GMII_MNG_CMD_FIN))
;
value = dnet_readw_mac(dnet, DNET_INTERNAL_GMII_MNG_DAT_REG);
debug(DRIVERNAME "dnet_mdio_read %02x:%02x <- %04x\n",
dnet->phy_addr, reg, value);
return value;
}
static int dnet_send(struct eth_device *netdev, volatile void *packet,
int length)
{
struct dnet_device *dnet = to_dnet(netdev);
int i, len, wrsz;
unsigned int *bufp;
unsigned int tx_cmd;
debug(DRIVERNAME "[%s] Sending %u bytes\n", __func__, length);
/* frame size (words) */
len = (length + 3) >> 2;
bufp = (unsigned int *) (((u32)packet) & 0xFFFFFFFC);
wrsz = (u32)length + 3;
wrsz += ((u32)packet) & 0x3;
wrsz >>= 2;
tx_cmd = ((((unsigned int)(packet)) & 0x03) << 16) | (u32)length;
/* check if there is enough room for the current frame */
if (wrsz < (DNET_FIFO_SIZE - readl(&dnet->regs->TX_FIFO_WCNT))) {
for (i = 0; i < wrsz; i++)
writel(*bufp++, &dnet->regs->TX_DATA_FIFO);
/*
* inform MAC that a packet's written and ready
* to be shipped out
*/
writel(tx_cmd, &dnet->regs->TX_LEN_FIFO);
} else {
printf(DRIVERNAME "No free space (actual %d, required %d "
"(words))\n", DNET_FIFO_SIZE -
readl(&dnet->regs->TX_FIFO_WCNT), wrsz);
}
/* No one cares anyway */
return 0;
}
static int dnet_recv(struct eth_device *netdev)
{
struct dnet_device *dnet = to_dnet(netdev);
unsigned int *data_ptr;
int pkt_len, poll, i;
u32 cmd_word;
debug("Waiting for pkt (polling)\n");
poll = 50;
while ((readl(&dnet->regs->RX_FIFO_WCNT) >> 16) == 0) {
udelay(10); /* wait 10 usec */
if (--poll == 0)
return 0; /* no pkt available */
}
cmd_word = readl(&dnet->regs->RX_LEN_FIFO);
pkt_len = cmd_word & 0xFFFF;
debug("Got pkt with size %d bytes\n", pkt_len);
if (cmd_word & 0xDF180000)
printf("%s packet receive error %x\n", __func__, cmd_word);
data_ptr = (unsigned int *) NetRxPackets[0];
for (i = 0; i < (pkt_len + 3) >> 2; i++)
*data_ptr++ = readl(&dnet->regs->RX_DATA_FIFO);
NetReceive(NetRxPackets[0], pkt_len + 5); /* ok + 5 ?? */
return 0;
}
static void dnet_set_hwaddr(struct eth_device *netdev)
{
struct dnet_device *dnet = to_dnet(netdev);
u16 tmp;
tmp = cpu_to_be16(*((u16 *)netdev->enetaddr));
dnet_writew_mac(dnet, DNET_INTERNAL_MAC_ADDR_0_REG, tmp);
tmp = cpu_to_be16(*((u16 *)(netdev->enetaddr + 2)));
dnet_writew_mac(dnet, DNET_INTERNAL_MAC_ADDR_1_REG, tmp);
tmp = cpu_to_be16(*((u16 *)(netdev->enetaddr + 4)));
dnet_writew_mac(dnet, DNET_INTERNAL_MAC_ADDR_2_REG, tmp);
}
static void dnet_phy_reset(struct dnet_device *dnet)
{
struct eth_device *netdev = &dnet->netdev;
int i;
u16 status, adv;
adv = ADVERTISE_CSMA | ADVERTISE_ALL;
dnet_mdio_write(dnet, MII_ADVERTISE, adv);
printf("%s: Starting autonegotiation...\n", netdev->name);
dnet_mdio_write(dnet, MII_BMCR, (BMCR_ANENABLE
| BMCR_ANRESTART));
for (i = 0; i < CONFIG_DNET_AUTONEG_TIMEOUT / 100; i++) {
status = dnet_mdio_read(dnet, MII_BMSR);
if (status & BMSR_ANEGCOMPLETE)
break;
udelay(100);
}
if (status & BMSR_ANEGCOMPLETE)
printf("%s: Autonegotiation complete\n", netdev->name);
else
printf("%s: Autonegotiation timed out (status=0x%04x)\n",
netdev->name, status);
}
static int dnet_phy_init(struct dnet_device *dnet)
{
struct eth_device *netdev = &dnet->netdev;
u16 phy_id, status, adv, lpa;
int media, speed, duplex;
int i;
u32 ctl_reg;
/* Find a PHY */
for (i = 0; i < 32; i++) {
dnet->phy_addr = i;
phy_id = dnet_mdio_read(dnet, MII_PHYSID1);
if (phy_id != 0xffff) {
/* ok we found it */
printf("Found PHY at address %d PHYID (%04x:%04x)\n",
i, phy_id,
dnet_mdio_read(dnet, MII_PHYSID2));
break;
}
}
/* Check if the PHY is up to snuff... */
phy_id = dnet_mdio_read(dnet, MII_PHYSID1);
if (phy_id == 0xffff) {
printf("%s: No PHY present\n", netdev->name);
return -1;
}
status = dnet_mdio_read(dnet, MII_BMSR);
if (!(status & BMSR_LSTATUS)) {
/* Try to re-negotiate if we don't have link already. */
dnet_phy_reset(dnet);
for (i = 0; i < CONFIG_DNET_AUTONEG_TIMEOUT / 100; i++) {
status = dnet_mdio_read(dnet, MII_BMSR);
if (status & BMSR_LSTATUS)
break;
udelay(100);
}
}
if (!(status & BMSR_LSTATUS)) {
printf("%s: link down (status: 0x%04x)\n",
netdev->name, status);
return -1;
} else {
adv = dnet_mdio_read(dnet, MII_ADVERTISE);
lpa = dnet_mdio_read(dnet, MII_LPA);
media = mii_nway_result(lpa & adv);
speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)
? 1 : 0);
duplex = (media & ADVERTISE_FULL) ? 1 : 0;
/* 1000BaseT ethernet is not supported */
printf("%s: link up, %sMbps %s-duplex (lpa: 0x%04x)\n",
netdev->name,
speed ? "100" : "10",
duplex ? "full" : "half",
lpa);
ctl_reg = dnet_readw_mac(dnet, DNET_INTERNAL_RXTX_CONTROL_REG);
if (duplex)
ctl_reg &= ~(DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP);
else
ctl_reg |= DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP;
dnet_writew_mac(dnet, DNET_INTERNAL_RXTX_CONTROL_REG, ctl_reg);
return 0;
}
}
static int dnet_init(struct eth_device *netdev, bd_t *bd)
{
struct dnet_device *dnet = to_dnet(netdev);
u32 config;
/*
* dnet_halt should have been called at some point before now,
* so we'll assume the controller is idle.
*/
/* set hardware address */
dnet_set_hwaddr(netdev);
if (dnet_phy_init(dnet) < 0)
return -1;
/* flush rx/tx fifos */
writel(DNET_SYS_CTL_RXFIFOFLUSH | DNET_SYS_CTL_TXFIFOFLUSH,
&dnet->regs->SYS_CTL);
udelay(1000);
writel(0, &dnet->regs->SYS_CTL);
config = dnet_readw_mac(dnet, DNET_INTERNAL_RXTX_CONTROL_REG);
config |= DNET_INTERNAL_RXTX_CONTROL_RXPAUSE |
DNET_INTERNAL_RXTX_CONTROL_RXBROADCAST |
DNET_INTERNAL_RXTX_CONTROL_DROPCONTROL |
DNET_INTERNAL_RXTX_CONTROL_DISCFXFCS;
dnet_writew_mac(dnet, DNET_INTERNAL_RXTX_CONTROL_REG, config);
/* Enable TX and RX */
dnet_writew_mac(dnet, DNET_INTERNAL_MODE_REG,
DNET_INTERNAL_MODE_RXEN | DNET_INTERNAL_MODE_TXEN);
return 0;
}
static void dnet_halt(struct eth_device *netdev)
{
struct dnet_device *dnet = to_dnet(netdev);
/* Disable TX and RX */
dnet_writew_mac(dnet, DNET_INTERNAL_MODE_REG, 0);
}
int dnet_eth_initialize(int id, void *regs, unsigned int phy_addr)
{
struct dnet_device *dnet;
struct eth_device *netdev;
unsigned int dev_capa;
dnet = malloc(sizeof(struct dnet_device));
if (!dnet) {
printf("Error: Failed to allocate memory for DNET%d\n", id);
return -1;
}
memset(dnet, 0, sizeof(struct dnet_device));
netdev = &dnet->netdev;
dnet->regs = (struct dnet_registers *)regs;
dnet->phy_addr = phy_addr;
sprintf(netdev->name, "dnet%d", id);
netdev->init = dnet_init;
netdev->halt = dnet_halt;
netdev->send = dnet_send;
netdev->recv = dnet_recv;
dev_capa = readl(&dnet->regs->VERCAPS) & 0xFFFF;
debug("%s: has %smdio, %sirq, %sgigabit, %sdma \n", netdev->name,
(dev_capa & DNET_HAS_MDIO) ? "" : "no ",
(dev_capa & DNET_HAS_IRQ) ? "" : "no ",
(dev_capa & DNET_HAS_GIGABIT) ? "" : "no ",
(dev_capa & DNET_HAS_DMA) ? "" : "no ");
eth_register(netdev);
return 0;
}

166
drivers/net/dnet.h
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@ -0,0 +1,166 @@
/*
* Dave Ethernet Controller driver
*
* Copyright (C) 2008 Dave S.r.l. <www.dave.eu>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __DRIVERS_DNET_H__
#define __DRIVERS_DNET_H__
#define DRIVERNAME "dnet"
struct dnet_registers {
/* ALL DNET FIFO REGISTERS */
u32 RX_LEN_FIFO;
u32 RX_DATA_FIFO;
u32 TX_LEN_FIFO;
u32 TX_DATA_FIFO;
u32 pad1[0x3c];
/* ALL DNET CONTROL/STATUS REGISTERS */
u32 VERCAPS;
u32 INTR_SRC;
u32 INTR_ENB;
u32 RX_STATUS;
u32 TX_STATUS;
u32 RX_FRAMES_CNT;
u32 TX_FRAMES_CNT;
u32 RX_FIFO_TH;
u32 TX_FIFO_TH;
u32 SYS_CTL;
u32 PAUSE_TMR;
u32 RX_FIFO_WCNT;
u32 TX_FIFO_WCNT;
u32 pad2[0x33];
/* ALL DNET MAC REGISTERS */
u32 MACREG_DATA; /* Mac-Reg Data */
u32 MACREG_ADDR; /* Mac-Reg Addr */
u32 pad3[0x3e];
/* ALL DNET RX STATISTICS COUNTERS */
u32 RX_PKT_IGNR_CNT;
u32 RX_LEN_CHK_ERR_CNT;
u32 RX_LNG_FRM_CNT;
u32 RX_SHRT_FRM_CNT;
u32 RX_IPG_VIOL_CNT;
u32 RX_CRC_ERR_CNT;
u32 RX_OK_PKT_CNT;
u32 RX_CTL_FRM_CNT;
u32 RX_PAUSE_FRM_CNT;
u32 RX_MULTICAST_CNT;
u32 RX_BROADCAST_CNT;
u32 RX_VLAN_TAG_CNT;
u32 RX_PRE_SHRINK_CNT;
u32 RX_DRIB_NIB_CNT;
u32 RX_UNSUP_OPCD_CNT;
u32 RX_BYTE_CNT;
u32 pad4[0x30];
/* DNET TX STATISTICS COUNTERS */
u32 TX_UNICAST_CNT;
u32 TX_PAUSE_FRM_CNT;
u32 TX_MULTICAST_CNT;
u32 TX_BRDCAST_CNT;
u32 TX_VLAN_TAG_CNT;
u32 TX_BAD_FCS_CNT;
u32 TX_JUMBO_CNT;
u32 TX_BYTE_CNT;
};
/* SOME INTERNAL MAC-CORE REGISTER */
#define DNET_INTERNAL_MODE_REG 0x0
#define DNET_INTERNAL_RXTX_CONTROL_REG 0x2
#define DNET_INTERNAL_MAX_PKT_SIZE_REG 0x4
#define DNET_INTERNAL_IGP_REG 0x8
#define DNET_INTERNAL_MAC_ADDR_0_REG 0xa
#define DNET_INTERNAL_MAC_ADDR_1_REG 0xc
#define DNET_INTERNAL_MAC_ADDR_2_REG 0xe
#define DNET_INTERNAL_TX_RX_STS_REG 0x12
#define DNET_INTERNAL_GMII_MNG_CTL_REG 0x14
#define DNET_INTERNAL_GMII_MNG_DAT_REG 0x16
#define DNET_INTERNAL_GMII_MNG_CMD_FIN (1 << 14)
#define DNET_INTERNAL_WRITE (1 << 31)
/* MAC-CORE REGISTER FIELDS */
/* MAC-CORE MODE REGISTER FIELDS */
#define DNET_INTERNAL_MODE_GBITEN (1 << 0)
#define DNET_INTERNAL_MODE_FCEN (1 << 1)
#define DNET_INTERNAL_MODE_RXEN (1 << 2)
#define DNET_INTERNAL_MODE_TXEN (1 << 3)
/* MAC-CORE RXTX CONTROL REGISTER FIELDS */
#define DNET_INTERNAL_RXTX_CONTROL_RXSHORTFRAME (1 << 8)
#define DNET_INTERNAL_RXTX_CONTROL_RXBROADCAST (1 << 7)
#define DNET_INTERNAL_RXTX_CONTROL_RXMULTICAST (1 << 4)
#define DNET_INTERNAL_RXTX_CONTROL_RXPAUSE (1 << 3)
#define DNET_INTERNAL_RXTX_CONTROL_DISTXFCS (1 << 2)
#define DNET_INTERNAL_RXTX_CONTROL_DISCFXFCS (1 << 1)
#define DNET_INTERNAL_RXTX_CONTROL_ENPROMISC (1 << 0)
#define DNET_INTERNAL_RXTX_CONTROL_DROPCONTROL (1 << 6)
#define DNET_INTERNAL_RXTX_CONTROL_ENABLEHALFDUP (1 << 5)
/* SYSTEM CONTROL REGISTER FIELDS */
#define DNET_SYS_CTL_IGNORENEXTPKT (1 << 0)
#define DNET_SYS_CTL_SENDPAUSE (1 << 2)
#define DNET_SYS_CTL_RXFIFOFLUSH (1 << 3)
#define DNET_SYS_CTL_TXFIFOFLUSH (1 << 4)
/* TX STATUS REGISTER FIELDS */
#define DNET_TX_STATUS_FIFO_ALMOST_EMPTY (1 << 2)
#define DNET_TX_STATUS_FIFO_ALMOST_FULL (1 << 1)
/* INTERRUPT SOURCE REGISTER FIELDS */
#define DNET_INTR_SRC_TX_PKTSENT (1 << 0)
#define DNET_INTR_SRC_TX_FIFOAF (1 << 1)
#define DNET_INTR_SRC_TX_FIFOAE (1 << 2)
#define DNET_INTR_SRC_TX_DISCFRM (1 << 3)
#define DNET_INTR_SRC_TX_FIFOFULL (1 << 4)
#define DNET_INTR_SRC_RX_CMDFIFOAF (1 << 8)
#define DNET_INTR_SRC_RX_CMDFIFOFF (1 << 9)
#define DNET_INTR_SRC_RX_DATAFIFOFF (1 << 10)
#define DNET_INTR_SRC_TX_SUMMARY (1 << 16)
#define DNET_INTR_SRC_RX_SUMMARY (1 << 17)
#define DNET_INTR_SRC_PHY (1 << 19)
/* INTERRUPT ENABLE REGISTER FIELDS */
#define DNET_INTR_ENB_TX_PKTSENT (1 << 0)
#define DNET_INTR_ENB_TX_FIFOAF (1 << 1)
#define DNET_INTR_ENB_TX_FIFOAE (1 << 2)
#define DNET_INTR_ENB_TX_DISCFRM (1 << 3)
#define DNET_INTR_ENB_TX_FIFOFULL (1 << 4)
#define DNET_INTR_ENB_RX_PKTRDY (1 << 8)
#define DNET_INTR_ENB_RX_FIFOAF (1 << 9)
#define DNET_INTR_ENB_RX_FIFOERR (1 << 10)
#define DNET_INTR_ENB_RX_ERROR (1 << 11)
#define DNET_INTR_ENB_RX_FIFOFULL (1 << 12)
#define DNET_INTR_ENB_RX_FIFOAE (1 << 13)
#define DNET_INTR_ENB_TX_SUMMARY (1 << 16)
#define DNET_INTR_ENB_RX_SUMMARY (1 << 17)
#define DNET_INTR_ENB_GLOBAL_ENABLE (1 << 18)
/*
* Capabilities. Used by the driver to know the capabilities that
* the ethernet controller inside the FPGA have.
*/
#define DNET_HAS_MDIO (1 << 0)
#define DNET_HAS_IRQ (1 << 1)
#define DNET_HAS_GIGABIT (1 << 2)
#define DNET_HAS_DMA (1 << 3)
#define DNET_HAS_MII (1 << 4) /* or GMII */
#define DNET_HAS_RMII (1 << 5) /* or RGMII */
#define DNET_CAPS_MASK 0xFFFF
#define DNET_FIFO_SIZE 2048 /* 2K x 32 bit */
#define DNET_FIFO_TX_DATA_AF_TH (DNET_FIFO_SIZE - 384) /* 384 = 1536 / 4 */
#define DNET_FIFO_TX_DATA_AE_TH (384)
#define DNET_FIFO_RX_CMD_AF_TH (1 << 16) /* just one frame inside the FIFO */
#endif

1
include/netdev.h
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@ -44,6 +44,7 @@ int cpu_eth_init(bd_t *bis);
int au1x00_enet_initialize(bd_t*);
int bfin_EMAC_initialize(bd_t *bis);
int dc21x4x_initialize(bd_t *bis);
int dnet_eth_initialize(int id, void *regs, unsigned int phy_addr);
int e1000_initialize(bd_t *bis);
int eepro100_initialize(bd_t *bis);
int eth_3com_initialize (bd_t * bis);

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