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Commit 92aa674d authored by Sascha Hauer's avatar Sascha Hauer Committed by Jeff Garzik
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[PATCH] network driver for Hilscher netx 



This is a patch for the Hilscher netx builtin ethernet ports. The
netx board support was merged into 2.6.17-git2.
The netx is a arm926 based SoC.

Signed-off-by: default avatarRobert Schwebel <r.schwebel@pengutronix.de>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>

--
 drivers/net/Kconfig             |   11
 drivers/net/Makefile            |    1
 drivers/net/netx-eth.c          |  516 ++++++++++++++++++++++++++++++++++++++++
 include/asm-arm/arch-netx/eth.h |   27 ++
 4 files changed, 555 insertions(+)
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 6d56ab93

drivers/net/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -854,6 +854,17 @@ config SMC9194 
	  <file:Documentation/networking/net-modules.txt>. The module

	  will be called smc9194.



config NET_NETX

	tristate "NetX Ethernet support"

	select MII

	depends on NET_ETHERNET && ARCH_NETX

	help

	  This is support for the Hilscher netX builtin Ethernet ports



	  To compile this driver as a module, choose M here and read

	  <file:Documentation/networking/net-modules.txt>. The module

	  will be called netx-eth.



config DM9000

	tristate "DM9000 support"

	depends on (ARM || MIPS) && NET_ETHERNET

drivers/net/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -187,6 +187,7 @@ obj-$(CONFIG_MACSONIC) += macsonic.o 
obj-$(CONFIG_MACMACE) += macmace.o

obj-$(CONFIG_MAC89x0) += mac89x0.o

obj-$(CONFIG_TUN) += tun.o

obj-$(CONFIG_NET_NETX) += netx-eth.o

obj-$(CONFIG_DL2K) += dl2k.o

obj-$(CONFIG_R8169) += r8169.o

obj-$(CONFIG_AMD8111_ETH) += amd8111e.o

drivers/net/netx-eth.c

0 → 100644
+516 −0
Original line number Diff line number Diff line 
/*

 * drivers/net/netx-eth.c

 *

 * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix

 *

 * 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.

 *

 * 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 <linux/config.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/delay.h>



#include <linux/netdevice.h>

#include <linux/platform_device.h>

#include <linux/etherdevice.h>

#include <linux/skbuff.h>

#include <linux/mii.h>



#include <asm/io.h>

#include <asm/hardware.h>

#include <asm/arch/hardware.h>

#include <asm/arch/netx-regs.h>

#include <asm/arch/pfifo.h>

#include <asm/arch/xc.h>

#include <asm/arch/eth.h>



/* XC Fifo Offsets */

#define EMPTY_PTR_FIFO(xcno)    (0 + ((xcno) << 3))	/* Index of the empty pointer FIFO */

#define IND_FIFO_PORT_HI(xcno)  (1 + ((xcno) << 3))	/* Index of the FIFO where received */

							/* Data packages are indicated by XC */

#define IND_FIFO_PORT_LO(xcno)  (2 + ((xcno) << 3))	/* Index of the FIFO where received */

							/* Data packages are indicated by XC */

#define REQ_FIFO_PORT_HI(xcno)  (3 + ((xcno) << 3))	/* Index of the FIFO where Data packages */

							/* have to be indicated by ARM which */

							/* shall be sent */

#define REQ_FIFO_PORT_LO(xcno)  (4 + ((xcno) << 3))	/* Index of the FIFO where Data packages */

							/* have to be indicated by ARM which shall */

							/* be sent */

#define CON_FIFO_PORT_HI(xcno)  (5 + ((xcno) << 3))	/* Index of the FIFO where sent Data packages */

							/* are confirmed */

#define CON_FIFO_PORT_LO(xcno)  (6 + ((xcno) << 3))	/* Index of the FIFO where sent Data */

							/* packages are confirmed */

#define PFIFO_MASK(xcno)        (0x7f << (xcno*8))



#define FIFO_PTR_FRAMELEN_SHIFT 0

#define FIFO_PTR_FRAMELEN_MASK  (0x7ff << 0)

#define FIFO_PTR_FRAMELEN(len)  (((len) << 0) & FIFO_PTR_FRAMELEN_MASK)

#define FIFO_PTR_TIMETRIG       (1<<11)

#define FIFO_PTR_MULTI_REQ

#define FIFO_PTR_ORIGIN         (1<<14)

#define FIFO_PTR_VLAN           (1<<15)

#define FIFO_PTR_FRAMENO_SHIFT  16

#define FIFO_PTR_FRAMENO_MASK   (0x3f << 16)

#define FIFO_PTR_FRAMENO(no)    (((no) << 16) & FIFO_PTR_FRAMENO_MASK)

#define FIFO_PTR_SEGMENT_SHIFT  22

#define FIFO_PTR_SEGMENT_MASK   (0xf << 22)

#define FIFO_PTR_SEGMENT(seg)   (((seg) & 0xf) << 22)

#define FIFO_PTR_ERROR_SHIFT    28

#define FIFO_PTR_ERROR_MASK     (0xf << 28)



#define ISR_LINK_STATUS_CHANGE (1<<4)

#define ISR_IND_LO             (1<<3)

#define ISR_CON_LO             (1<<2)

#define ISR_IND_HI             (1<<1)

#define ISR_CON_HI             (1<<0)



#define ETH_MAC_LOCAL_CONFIG 0x1560

#define ETH_MAC_4321         0x1564

#define ETH_MAC_65           0x1568



#define MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT 16

#define MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK (0xf<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT)

#define MAC_TRAFFIC_CLASS_ARRANGEMENT(x) (((x)<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) & MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK)

#define LOCAL_CONFIG_LINK_STATUS_IRQ_EN (1<<24)

#define LOCAL_CONFIG_CON_LO_IRQ_EN (1<<23)

#define LOCAL_CONFIG_CON_HI_IRQ_EN (1<<22)

#define LOCAL_CONFIG_IND_LO_IRQ_EN (1<<21)

#define LOCAL_CONFIG_IND_HI_IRQ_EN (1<<20)



#define CARDNAME "netx-eth"



/* LSB must be zero */

#define INTERNAL_PHY_ADR 0x1c



struct netx_eth_priv {

	void                    __iomem *sram_base, *xpec_base, *xmac_base;

	int                     id;

	struct net_device_stats stats;

	struct mii_if_info      mii;

	u32                     msg_enable;

	struct xc               *xc;

	spinlock_t              lock;

};



static void netx_eth_set_multicast_list(struct net_device *ndev)

{

	/* implement me */

}



static int

netx_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)

{

	struct netx_eth_priv *priv = netdev_priv(ndev);

	unsigned char *buf = skb->data;

	unsigned int len = skb->len;



	spin_lock_irq(&priv->lock);

	memcpy_toio(priv->sram_base + 1560, (void *)buf, len);

	if (len < 60) {

		memset_io(priv->sram_base + 1560 + len, 0, 60 - len);

		len = 60;

	}



	pfifo_push(REQ_FIFO_PORT_LO(priv->id),

	           FIFO_PTR_SEGMENT(priv->id) |

	           FIFO_PTR_FRAMENO(1) |

	           FIFO_PTR_FRAMELEN(len));



	ndev->trans_start = jiffies;

	priv->stats.tx_packets++;

	priv->stats.tx_bytes += skb->len;



	netif_stop_queue(ndev);

	spin_unlock_irq(&priv->lock);

	dev_kfree_skb(skb);



	return 0;

}



static void netx_eth_receive(struct net_device *ndev)

{

	struct netx_eth_priv *priv = netdev_priv(ndev);

	unsigned int val, frameno, seg, len;

	unsigned char *data;

	struct sk_buff *skb;



	val = pfifo_pop(IND_FIFO_PORT_LO(priv->id));



	frameno = (val & FIFO_PTR_FRAMENO_MASK) >> FIFO_PTR_FRAMENO_SHIFT;

	seg = (val & FIFO_PTR_SEGMENT_MASK) >> FIFO_PTR_SEGMENT_SHIFT;

	len = (val & FIFO_PTR_FRAMELEN_MASK) >> FIFO_PTR_FRAMELEN_SHIFT;



	skb = dev_alloc_skb(len);

	if (unlikely(skb == NULL)) {

		printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",

			ndev->name);

		priv->stats.rx_dropped++;

		return;

	}



	data = skb_put(skb, len);



	memcpy_fromio(data, priv->sram_base + frameno * 1560, len);



	pfifo_push(EMPTY_PTR_FIFO(priv->id),

		FIFO_PTR_SEGMENT(seg) | FIFO_PTR_FRAMENO(frameno));



	ndev->last_rx = jiffies;

	skb->dev = ndev;

	skb->protocol = eth_type_trans(skb, ndev);

	netif_rx(skb);

	priv->stats.rx_packets++;

	priv->stats.rx_bytes += len;

}



static irqreturn_t

netx_eth_interrupt(int irq, void *dev_id, struct pt_regs *regs)

{

	struct net_device *ndev = dev_id;

	struct netx_eth_priv *priv = netdev_priv(ndev);

	int status;

	unsigned long flags;



	spin_lock_irqsave(&priv->lock, flags);



	status = readl(NETX_PFIFO_XPEC_ISR(priv->id));

	while (status) {

		int fill_level;

		writel(status, NETX_PFIFO_XPEC_ISR(priv->id));



		if ((status & ISR_CON_HI) || (status & ISR_IND_HI))

			printk("%s: unexpected status: 0x%08x\n",

			    __FUNCTION__, status);



		fill_level =

		    readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id)));

		while (fill_level--)

			netx_eth_receive(ndev);



		if (status & ISR_CON_LO)

			netif_wake_queue(ndev);



		if (status & ISR_LINK_STATUS_CHANGE)

			mii_check_media(&priv->mii, netif_msg_link(priv), 1);



		status = readl(NETX_PFIFO_XPEC_ISR(priv->id));

	}

	spin_unlock_irqrestore(&priv->lock, flags);

	return IRQ_HANDLED;

}



static struct net_device_stats *netx_eth_query_statistics(struct net_device *ndev)

{

	struct netx_eth_priv *priv = netdev_priv(ndev);

	return &priv->stats;

}



static int netx_eth_open(struct net_device *ndev)

{

	struct netx_eth_priv *priv = netdev_priv(ndev);



	if (request_irq

	    (ndev->irq, &netx_eth_interrupt, SA_SHIRQ, ndev->name, ndev))

		return -EAGAIN;



	writel(ndev->dev_addr[0] |

	       ndev->dev_addr[1]<<8 |

	       ndev->dev_addr[2]<<16 |

	       ndev->dev_addr[3]<<24,

	       priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);

	writel(ndev->dev_addr[4] |

	       ndev->dev_addr[5]<<8,

	       priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65);



	writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN |

		LOCAL_CONFIG_CON_LO_IRQ_EN |

		LOCAL_CONFIG_CON_HI_IRQ_EN |

		LOCAL_CONFIG_IND_LO_IRQ_EN |

		LOCAL_CONFIG_IND_HI_IRQ_EN,

		priv->xpec_base + NETX_XPEC_RAM_START_OFS +

		ETH_MAC_LOCAL_CONFIG);



	mii_check_media(&priv->mii, netif_msg_link(priv), 1);

	netif_start_queue(ndev);



	return 0;

}



static int netx_eth_close(struct net_device *ndev)

{

	struct netx_eth_priv *priv = netdev_priv(ndev);



	netif_stop_queue(ndev);



	writel(0,

	    priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_LOCAL_CONFIG);



	free_irq(ndev->irq, ndev);



	return 0;

}



static void netx_eth_timeout(struct net_device *ndev)

{

	struct netx_eth_priv *priv = netdev_priv(ndev);

	int i;



	printk(KERN_ERR "%s: transmit timed out, resetting\n", ndev->name);



	spin_lock_irq(&priv->lock);



	xc_reset(priv->xc);

	xc_start(priv->xc);



	for (i=2; i<=18; i++)

		pfifo_push(EMPTY_PTR_FIFO(priv->id),

			FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));



	spin_unlock_irq(&priv->lock);



	netif_wake_queue(ndev);

}



static int

netx_eth_phy_read(struct net_device *ndev, int phy_id, int reg)

{

	unsigned int val;



	val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |

	      MIIMU_REGADDR(reg) | MIIMU_PHY_NRES;



	writel(val, NETX_MIIMU);

	while (readl(NETX_MIIMU) & MIIMU_SNRDY);



	return readl(NETX_MIIMU) >> 16;



}



static void

netx_eth_phy_write(struct net_device *ndev, int phy_id, int reg, int value)

{

	unsigned int val;



	val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |

	      MIIMU_REGADDR(reg) | MIIMU_PHY_NRES | MIIMU_OPMODE_WRITE |

	      MIIMU_DATA(value);



	writel(val, NETX_MIIMU);

	while (readl(NETX_MIIMU) & MIIMU_SNRDY);

}



static int netx_eth_enable(struct net_device *ndev)

{

	struct netx_eth_priv *priv = netdev_priv(ndev);

	unsigned int mac4321, mac65;

	int running, i;



	ether_setup(ndev);



	ndev->open = netx_eth_open;

	ndev->stop = netx_eth_close;

	ndev->hard_start_xmit = netx_eth_hard_start_xmit;

	ndev->tx_timeout = netx_eth_timeout;

	ndev->watchdog_timeo = msecs_to_jiffies(5000);

	ndev->get_stats = netx_eth_query_statistics;

	ndev->set_multicast_list = netx_eth_set_multicast_list;



	priv->msg_enable       = NETIF_MSG_LINK;

	priv->mii.phy_id_mask  = 0x1f;

	priv->mii.reg_num_mask = 0x1f;

	priv->mii.force_media  = 0;

	priv->mii.full_duplex  = 0;

	priv->mii.dev	     = ndev;

	priv->mii.mdio_read    = netx_eth_phy_read;

	priv->mii.mdio_write   = netx_eth_phy_write;

	priv->mii.phy_id = INTERNAL_PHY_ADR + priv->id;



	running = xc_running(priv->xc);

	xc_stop(priv->xc);



	/* if the xc engine is already running, assume the bootloader has

	 * loaded the firmware for us

	 */

	if (running) {

		/* get Node Address from hardware */

		mac4321 = readl(priv->xpec_base +

			NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);

		mac65 = readl(priv->xpec_base +

			NETX_XPEC_RAM_START_OFS + ETH_MAC_65);



		ndev->dev_addr[0] = mac4321 & 0xff;

		ndev->dev_addr[1] = (mac4321 >> 8) & 0xff;

		ndev->dev_addr[2] = (mac4321 >> 16) & 0xff;

		ndev->dev_addr[3] = (mac4321 >> 24) & 0xff;

		ndev->dev_addr[4] = mac65 & 0xff;

		ndev->dev_addr[5] = (mac65 >> 8) & 0xff;

	} else {

		if (xc_request_firmware(priv->xc)) {

			printk(CARDNAME ": requesting firmware failed\n");

			return -ENODEV;

		}

	}



	xc_reset(priv->xc);

	xc_start(priv->xc);



	if (!is_valid_ether_addr(ndev->dev_addr))

		printk("%s: Invalid ethernet MAC address.  Please "

		       "set using ifconfig\n", ndev->name);



	for (i=2; i<=18; i++)

		pfifo_push(EMPTY_PTR_FIFO(priv->id),

			FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));



	return register_netdev(ndev);



}



static int netx_eth_drv_probe(struct platform_device *pdev)

{

	struct netx_eth_priv *priv;

	struct net_device *ndev;

	struct netxeth_platform_data *pdata;

	int ret;



	ndev = alloc_etherdev(sizeof (struct netx_eth_priv));

	if (!ndev) {

		printk("%s: could not allocate device.\n", CARDNAME);

		ret = -ENOMEM;

		goto exit;

	}

	SET_MODULE_OWNER(ndev);

	SET_NETDEV_DEV(ndev, &pdev->dev);



	platform_set_drvdata(pdev, ndev);



	priv = netdev_priv(ndev);



	pdata = (struct netxeth_platform_data *)pdev->dev.platform_data;

	priv->xc = request_xc(pdata->xcno, &pdev->dev);

	if (!priv->xc) {

		dev_err(&pdev->dev, "unable to request xc engine\n");

		ret = -ENODEV;

		goto exit_free_netdev;

	}



	ndev->irq = priv->xc->irq;

	priv->id = pdev->id;

	priv->xpec_base = priv->xc->xpec_base;

	priv->xmac_base = priv->xc->xmac_base;

	priv->sram_base = priv->xc->sram_base;



	ret = pfifo_request(PFIFO_MASK(priv->id));

	if (ret) {

		printk("unable to request PFIFO\n");

		goto exit_free_xc;

	}



	ret = netx_eth_enable(ndev);

	if (ret)

		goto exit_free_pfifo;



	return 0;

exit_free_pfifo:

	pfifo_free(PFIFO_MASK(priv->id));

exit_free_xc:

	free_xc(priv->xc);

exit_free_netdev:

	platform_set_drvdata(pdev, NULL);

	free_netdev(ndev);

exit:

	return ret;

}



static int netx_eth_drv_remove(struct platform_device *pdev)

{

	struct net_device *ndev = dev_get_drvdata(&pdev->dev);

	struct netx_eth_priv *priv = netdev_priv(ndev);



	platform_set_drvdata(pdev, NULL);



	unregister_netdev(ndev);

	xc_stop(priv->xc);

	free_xc(priv->xc);

	free_netdev(ndev);

	pfifo_free(PFIFO_MASK(priv->id));



	return 0;

}



static int netx_eth_drv_suspend(struct platform_device *pdev, pm_message_t state)

{

	dev_err(&pdev->dev, "suspend not implemented\n");

	return 0;

}



static int netx_eth_drv_resume(struct platform_device *pdev)

{

	dev_err(&pdev->dev, "resume not implemented\n");

	return 0;

}



static struct platform_driver netx_eth_driver = {

	.probe		= netx_eth_drv_probe,

	.remove		= netx_eth_drv_remove,

	.suspend	= netx_eth_drv_suspend,

	.resume		= netx_eth_drv_resume,

	.driver		= {

		.name	= CARDNAME,

		.owner	= THIS_MODULE,

	},

};



static int __init netx_eth_init(void)

{

	unsigned int phy_control, val;



	printk("NetX Ethernet driver\n");



	phy_control = PHY_CONTROL_PHY_ADDRESS(INTERNAL_PHY_ADR>>1) |

		      PHY_CONTROL_PHY1_MODE(PHY_MODE_ALL) |

		      PHY_CONTROL_PHY1_AUTOMDIX |

		      PHY_CONTROL_PHY1_EN |

		      PHY_CONTROL_PHY0_MODE(PHY_MODE_ALL) |

		      PHY_CONTROL_PHY0_AUTOMDIX |

		      PHY_CONTROL_PHY0_EN |

		      PHY_CONTROL_CLK_XLATIN;



	val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);

	writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);



	writel(phy_control | PHY_CONTROL_RESET, NETX_SYSTEM_PHY_CONTROL);

	udelay(100);



	val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);

	writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);



	writel(phy_control, NETX_SYSTEM_PHY_CONTROL);



	return platform_driver_register(&netx_eth_driver);

}



static void __exit netx_eth_cleanup(void)

{

	platform_driver_unregister(&netx_eth_driver);

}



module_init(netx_eth_init);

module_exit(netx_eth_cleanup);



MODULE_AUTHOR("Sascha Hauer, Pengutronix");

MODULE_LICENSE("GPL");

include/asm-arm/arch-netx/eth.h

0 → 100644
+27 −0
Original line number Diff line number Diff line 
/*

 * include/asm-arm/arch-netx/eth.h

 *

 * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix

 *

 * 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.

 *

 * 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

 */



#ifndef ASMARM_ARCH_ETH_H

#define ASMARM_ARCH_ETH_H



struct netxeth_platform_data {

	unsigned int xcno;	/* number of xmac/xpec engine this eth uses */

};



#endif