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net: Add driver for Zynq Gem IP

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Device driver for Zynq Gem IP.

Signed-off-by: Michal Simek <monstr@monstr.eu>
CC: Joe Hershberger <joe.hershberger@gmail.com>
CC: Marek Vasut <marex@denx.de>
Acked-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Michal Simek 2012-09-13 20:23:34 +00:00 committed by Joe Hershberger
parent 1dff9d0f54
commit 185f7d9afc
3 changed files with 442 additions and 1 deletions
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1
drivers/net/Makefile
View File

@ -80,6 +80,7 @@ COBJS-$(CONFIG_XILINX_AXIEMAC) += xilinx_axi_emac.o
COBJS-$(CONFIG_XILINX_EMACLITE) += xilinx_emaclite.o
COBJS-$(CONFIG_XILINX_LL_TEMAC) += xilinx_ll_temac.o xilinx_ll_temac_mdio.o \
xilinx_ll_temac_fifo.o xilinx_ll_temac_sdma.o
COBJS-$(CONFIG_ZYNQ_GEM) += zynq_gem.o
COBJS := $(sort $(COBJS-y))
SRCS := $(COBJS:.o=.c)

440
drivers/net/zynq_gem.c Normal file
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@ -0,0 +1,440 @@
/*
* (C) Copyright 2011 Michal Simek
*
* Michal SIMEK <monstr@monstr.eu>
*
* Based on Xilinx gmac driver:
* (C) Copyright 2011 Xilinx
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 <net.h>
#include <config.h>
#include <malloc.h>
#include <asm/io.h>
#include <phy.h>
#include <miiphy.h>
#include <watchdog.h>
#if !defined(CONFIG_PHYLIB)
# error XILINX_GEM_ETHERNET requires PHYLIB
#endif
/* Bit/mask specification */
#define ZYNQ_GEM_PHYMNTNC_OP_MASK 0x40020000 /* operation mask bits */
#define ZYNQ_GEM_PHYMNTNC_OP_R_MASK 0x20000000 /* read operation */
#define ZYNQ_GEM_PHYMNTNC_OP_W_MASK 0x10000000 /* write operation */
#define ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK 23 /* Shift bits for PHYAD */
#define ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK 18 /* Shift bits for PHREG */
#define ZYNQ_GEM_RXBUF_EOF_MASK 0x00008000 /* End of frame. */
#define ZYNQ_GEM_RXBUF_SOF_MASK 0x00004000 /* Start of frame. */
#define ZYNQ_GEM_RXBUF_LEN_MASK 0x00003FFF /* Mask for length field */
#define ZYNQ_GEM_RXBUF_WRAP_MASK 0x00000002 /* Wrap bit, last BD */
#define ZYNQ_GEM_RXBUF_NEW_MASK 0x00000001 /* Used bit.. */
#define ZYNQ_GEM_RXBUF_ADD_MASK 0xFFFFFFFC /* Mask for address */
/* Wrap bit, last descriptor */
#define ZYNQ_GEM_TXBUF_WRAP_MASK 0x40000000
#define ZYNQ_GEM_TXBUF_LAST_MASK 0x00008000 /* Last buffer */
#define ZYNQ_GEM_TXSR_HRESPNOK_MASK 0x00000100 /* Transmit hresp not OK */
#define ZYNQ_GEM_TXSR_URUN_MASK 0x00000040 /* Transmit underrun */
/* Transmit buffs exhausted mid frame */
#define ZYNQ_GEM_TXSR_BUFEXH_MASK 0x00000010
#define ZYNQ_GEM_NWCTRL_TXEN_MASK 0x00000008 /* Enable transmit */
#define ZYNQ_GEM_NWCTRL_RXEN_MASK 0x00000004 /* Enable receive */
#define ZYNQ_GEM_NWCTRL_MDEN_MASK 0x00000010 /* Enable MDIO port */
#define ZYNQ_GEM_NWCTRL_STARTTX_MASK 0x00000200 /* Start tx (tx_go) */
#define ZYNQ_GEM_NWCFG_SPEED 0x00000001 /* 100 Mbps operation */
#define ZYNQ_GEM_NWCFG_FDEN 0x00000002 /* Full Duplex mode */
#define ZYNQ_GEM_NWCFG_FSREM 0x00020000 /* FCS removal */
#define ZYNQ_GEM_NWCFG_MDCCLKDIV 0x000080000 /* Div pclk by 32, 80MHz */
#define ZYNQ_GEM_NWCFG_INIT (ZYNQ_GEM_NWCFG_SPEED | \
ZYNQ_GEM_NWCFG_FDEN | \
ZYNQ_GEM_NWCFG_FSREM | \
ZYNQ_GEM_NWCFG_MDCCLKDIV)
#define ZYNQ_GEM_NWSR_MDIOIDLE_MASK 0x00000004 /* PHY management idle */
#define ZYNQ_GEM_DMACR_BLENGTH 0x00000004 /* INCR4 AHB bursts */
/* Use full configured addressable space (8 Kb) */
#define ZYNQ_GEM_DMACR_RXSIZE 0x00000300
/* Use full configured addressable space (4 Kb) */
#define ZYNQ_GEM_DMACR_TXSIZE 0x00000400
/* Set with binary 00011000 to use 1536 byte(1*max length frame/buffer) */
#define ZYNQ_GEM_DMACR_RXBUF 0x00180000
#define ZYNQ_GEM_DMACR_INIT (ZYNQ_GEM_DMACR_BLENGTH | \
ZYNQ_GEM_DMACR_RXSIZE | \
ZYNQ_GEM_DMACR_TXSIZE | \
ZYNQ_GEM_DMACR_RXBUF)
/* Device registers */
struct zynq_gem_regs {
u32 nwctrl; /* Network Control reg */
u32 nwcfg; /* Network Config reg */
u32 nwsr; /* Network Status reg */
u32 reserved1;
u32 dmacr; /* DMA Control reg */
u32 txsr; /* TX Status reg */
u32 rxqbase; /* RX Q Base address reg */
u32 txqbase; /* TX Q Base address reg */
u32 rxsr; /* RX Status reg */
u32 reserved2[2];
u32 idr; /* Interrupt Disable reg */
u32 reserved3;
u32 phymntnc; /* Phy Maintaince reg */
u32 reserved4[18];
u32 hashl; /* Hash Low address reg */
u32 hashh; /* Hash High address reg */
#define LADDR_LOW 0
#define LADDR_HIGH 1
u32 laddr[4][LADDR_HIGH + 1]; /* Specific1 addr low/high reg */
u32 match[4]; /* Type ID1 Match reg */
u32 reserved6[18];
u32 stat[44]; /* Octects transmitted Low reg - stat start */
};
/* BD descriptors */
struct emac_bd {
u32 addr; /* Next descriptor pointer */
u32 status;
};
#define RX_BUF 3
/* Initialized, rxbd_current, rx_first_buf must be 0 after init */
struct zynq_gem_priv {
struct emac_bd tx_bd;
struct emac_bd rx_bd[RX_BUF];
char rxbuffers[RX_BUF * PKTSIZE_ALIGN];
u32 rxbd_current;
u32 rx_first_buf;
int phyaddr;
struct phy_device *phydev;
struct mii_dev *bus;
};
static inline int mdio_wait(struct eth_device *dev)
{
struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
u32 timeout = 200;
/* Wait till MDIO interface is ready to accept a new transaction. */
while (--timeout) {
if (readl(&regs->nwsr) & ZYNQ_GEM_NWSR_MDIOIDLE_MASK)
break;
WATCHDOG_RESET();
}
if (!timeout) {
printf("%s: Timeout\n", __func__);
return 1;
}
return 0;
}
static u32 phy_setup_op(struct eth_device *dev, u32 phy_addr, u32 regnum,
u32 op, u16 *data)
{
u32 mgtcr;
struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
if (mdio_wait(dev))
return 1;
/* Construct mgtcr mask for the operation */
mgtcr = ZYNQ_GEM_PHYMNTNC_OP_MASK | op |
(phy_addr << ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK) |
(regnum << ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK) | *data;
/* Write mgtcr and wait for completion */
writel(mgtcr, &regs->phymntnc);
if (mdio_wait(dev))
return 1;
if (op == ZYNQ_GEM_PHYMNTNC_OP_R_MASK)
*data = readl(&regs->phymntnc);
return 0;
}
static u32 phyread(struct eth_device *dev, u32 phy_addr, u32 regnum, u16 *val)
{
return phy_setup_op(dev, phy_addr, regnum,
ZYNQ_GEM_PHYMNTNC_OP_R_MASK, val);
}
static u32 phywrite(struct eth_device *dev, u32 phy_addr, u32 regnum, u16 data)
{
return phy_setup_op(dev, phy_addr, regnum,
ZYNQ_GEM_PHYMNTNC_OP_W_MASK, &data);
}
static int zynq_gem_setup_mac(struct eth_device *dev)
{
u32 i, macaddrlow, macaddrhigh;
struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
/* Set the MAC bits [31:0] in BOT */
macaddrlow = dev->enetaddr[0];
macaddrlow |= dev->enetaddr[1] << 8;
macaddrlow |= dev->enetaddr[2] << 16;
macaddrlow |= dev->enetaddr[3] << 24;
/* Set MAC bits [47:32] in TOP */
macaddrhigh = dev->enetaddr[4];
macaddrhigh |= dev->enetaddr[5] << 8;
for (i = 0; i < 4; i++) {
writel(0, &regs->laddr[i][LADDR_LOW]);
writel(0, &regs->laddr[i][LADDR_HIGH]);
/* Do not use MATCHx register */
writel(0, &regs->match[i]);
}
writel(macaddrlow, &regs->laddr[0][LADDR_LOW]);
writel(macaddrhigh, &regs->laddr[0][LADDR_HIGH]);
return 0;
}
static int zynq_gem_init(struct eth_device *dev, bd_t * bis)
{
u32 i;
struct phy_device *phydev;
const u32 stat_size = (sizeof(struct zynq_gem_regs) -
offsetof(struct zynq_gem_regs, stat)) / 4;
struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
struct zynq_gem_priv *priv = dev->priv;
const u32 supported = SUPPORTED_10baseT_Half |
SUPPORTED_10baseT_Full |
SUPPORTED_100baseT_Half |
SUPPORTED_100baseT_Full |
SUPPORTED_1000baseT_Half |
SUPPORTED_1000baseT_Full;
/* Disable all interrupts */
writel(0xFFFFFFFF, &regs->idr);
/* Disable the receiver & transmitter */
writel(0, &regs->nwctrl);
writel(0, &regs->txsr);
writel(0, &regs->rxsr);
writel(0, &regs->phymntnc);
/* Clear the Hash registers for the mac address pointed by AddressPtr */
writel(0x0, &regs->hashl);
/* Write bits [63:32] in TOP */
writel(0x0, &regs->hashh);
/* Clear all counters */
for (i = 0; i <= stat_size; i++)
readl(&regs->stat[i]);
/* Setup RxBD space */
memset(&(priv->rx_bd), 0, sizeof(priv->rx_bd));
/* Create the RxBD ring */
memset(&(priv->rxbuffers), 0, sizeof(priv->rxbuffers));
for (i = 0; i < RX_BUF; i++) {
priv->rx_bd[i].status = 0xF0000000;
priv->rx_bd[i].addr = (u32)((char *) &(priv->rxbuffers) +
(i * PKTSIZE_ALIGN));
}
/* WRAP bit to last BD */
priv->rx_bd[--i].addr |= ZYNQ_GEM_RXBUF_WRAP_MASK;
/* Write RxBDs to IP */
writel((u32) &(priv->rx_bd), &regs->rxqbase);
/* MAC Setup */
/* Setup Network Configuration register */
writel(ZYNQ_GEM_NWCFG_INIT, &regs->nwcfg);
/* Setup for DMA Configuration register */
writel(ZYNQ_GEM_DMACR_INIT, &regs->dmacr);
/* Setup for Network Control register, MDIO, Rx and Tx enable */
setbits_le32(&regs->nwctrl, ZYNQ_GEM_NWCTRL_MDEN_MASK |
ZYNQ_GEM_NWCTRL_RXEN_MASK | ZYNQ_GEM_NWCTRL_TXEN_MASK);
/* interface - look at tsec */
phydev = phy_connect(priv->bus, priv->phyaddr, dev, 0);
phydev->supported &= supported;
phydev->advertising = phydev->supported;
priv->phydev = phydev;
phy_config(phydev);
phy_startup(phydev);
return 0;
}
static int zynq_gem_send(struct eth_device *dev, void *ptr, int len)
{
u32 status;
struct zynq_gem_priv *priv = dev->priv;
struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
const u32 mask = ZYNQ_GEM_TXSR_HRESPNOK_MASK | \
ZYNQ_GEM_TXSR_URUN_MASK | ZYNQ_GEM_TXSR_BUFEXH_MASK;
/* setup BD */
writel((u32)&(priv->tx_bd), &regs->txqbase);
/* Setup Tx BD */
memset((void *) &(priv->tx_bd), 0, sizeof(struct emac_bd));
priv->tx_bd.addr = (u32)ptr;
priv->tx_bd.status = len | ZYNQ_GEM_TXBUF_LAST_MASK |
ZYNQ_GEM_TXBUF_WRAP_MASK;
/* Start transmit */
setbits_le32(&regs->nwctrl, ZYNQ_GEM_NWCTRL_STARTTX_MASK);
/* Read the stat register to know if the packet has been transmitted */
status = readl(&regs->txsr);
if (status & mask)
printf("Something has gone wrong here!? Status is 0x%x.\n",
status);
/* Clear Tx status register before leaving . */
writel(status, &regs->txsr);
return 0;
}
/* Do not check frame_recd flag in rx_status register 0x20 - just poll BD */
static int zynq_gem_recv(struct eth_device *dev)
{
int frame_len;
struct zynq_gem_priv *priv = dev->priv;
struct emac_bd *current_bd = &priv->rx_bd[priv->rxbd_current];
struct emac_bd *first_bd;
if (!(current_bd->addr & ZYNQ_GEM_RXBUF_NEW_MASK))
return 0;
if (!(current_bd->status &
(ZYNQ_GEM_RXBUF_SOF_MASK | ZYNQ_GEM_RXBUF_EOF_MASK))) {
printf("GEM: SOF or EOF not set for last buffer received!\n");
return 0;
}
frame_len = current_bd->status & ZYNQ_GEM_RXBUF_LEN_MASK;
if (frame_len) {
NetReceive((u8 *) (current_bd->addr &
ZYNQ_GEM_RXBUF_ADD_MASK), frame_len);
if (current_bd->status & ZYNQ_GEM_RXBUF_SOF_MASK)
priv->rx_first_buf = priv->rxbd_current;
else {
current_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK;
current_bd->status = 0xF0000000; /* FIXME */
}
if (current_bd->status & ZYNQ_GEM_RXBUF_EOF_MASK) {
first_bd = &priv->rx_bd[priv->rx_first_buf];
first_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK;
first_bd->status = 0xF0000000;
}
if ((++priv->rxbd_current) >= RX_BUF)
priv->rxbd_current = 0;
return frame_len;
}
return 0;
}
static void zynq_gem_halt(struct eth_device *dev)
{
struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
/* Disable the receiver & transmitter */
writel(0, &regs->nwctrl);
}
static int zynq_gem_miiphyread(const char *devname, uchar addr,
uchar reg, ushort *val)
{
struct eth_device *dev = eth_get_dev();
int ret;
ret = phyread(dev, addr, reg, val);
debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, *val);
return ret;
}
static int zynq_gem_miiphy_write(const char *devname, uchar addr,
uchar reg, ushort val)
{
struct eth_device *dev = eth_get_dev();
debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, val);
return phywrite(dev, addr, reg, val);
}
int zynq_gem_initialize(bd_t *bis, int base_addr)
{
struct eth_device *dev;
struct zynq_gem_priv *priv;
dev = calloc(1, sizeof(*dev));
if (dev == NULL)
return -1;
dev->priv = calloc(1, sizeof(struct zynq_gem_priv));
if (dev->priv == NULL) {
free(dev);
return -1;
}
priv = dev->priv;
#ifdef CONFIG_PHY_ADDR
priv->phyaddr = CONFIG_PHY_ADDR;
#else
priv->phyaddr = -1;
#endif
sprintf(dev->name, "Gem.%x", base_addr);
dev->iobase = base_addr;
dev->init = zynq_gem_init;
dev->halt = zynq_gem_halt;
dev->send = zynq_gem_send;
dev->recv = zynq_gem_recv;
dev->write_hwaddr = zynq_gem_setup_mac;
eth_register(dev);
miiphy_register(dev->name, zynq_gem_miiphyread, zynq_gem_miiphy_write);
priv->bus = miiphy_get_dev_by_name(dev->name);
return 1;
}

2
include/netdev.h
View File

@ -104,7 +104,7 @@ int xilinx_emaclite_initialize(bd_t *bis, unsigned long base_addr,
int txpp, int rxpp);
int xilinx_ll_temac_eth_init(bd_t *bis, unsigned long base_addr, int flags,
unsigned long ctrl_addr);
int zynq_gem_initialize(bd_t *bis, int base_addr);
/*
* As long as the Xilinx xps_ll_temac ethernet driver has not its own interface
* exported by a public hader file, we need a global definition at this point.