drivers/net/ethernet/amd/hplance.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /* hplance.c  : the  Linux/hp300/lance ethernet driver
  *
  * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
  * Based on the Sun Lance driver and the NetBSD HP Lance driver
  * Uses the generic 7990.c LANCE code.
  */

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
 #include <linux/string.h>
 #include <linux/delay.h>
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/pgtable.h>
 /* Used for the temporal inet entries and routing */
 #include <linux/socket.h>
 #include <linux/route.h>
 #include <linux/dio.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/skbuff.h>

 #include <asm/io.h>

 #include "hplance.h"

 /* We have 16392 bytes of RAM for the init block and buffers. This places
  * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
  * buffers and 2 Tx buffers, it takes (8 + 2) * 1544 bytes.
  */
 #define LANCE_LOG_TX_BUFFERS 1
 #define LANCE_LOG_RX_BUFFERS 3

 #include "7990.h"                                 /* use generic LANCE code */

 /* Our private data structure */
 struct hplance_private {
 	struct lance_private lance;
 };

 /* function prototypes... This is easy because all the grot is in the
  * generic LANCE support. All we have to support is probing for boards,
  * plus board-specific init, open and close actions.
  * Oh, and we need to tell the generic code how to read and write LANCE registers...
  */
 static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent);
 static void hplance_init(struct net_device *dev, struct dio_dev *d);
 static void hplance_remove_one(struct dio_dev *d);
 static void hplance_writerap(void *priv, unsigned short value);
 static void hplance_writerdp(void *priv, unsigned short value);
 static unsigned short hplance_readrdp(void *priv);
 static int hplance_open(struct net_device *dev);
 static int hplance_close(struct net_device *dev);

 static struct dio_device_id hplance_dio_tbl[] = {
 	{ DIO_ID_LAN },
 	{ 0 }
 };

 static struct dio_driver hplance_driver = {
 	.name      = "hplance",
 	.id_table  = hplance_dio_tbl,
 	.probe     = hplance_init_one,
 	.remove    = hplance_remove_one,
 };

 static const struct net_device_ops hplance_netdev_ops = {
 	.ndo_open		= hplance_open,
 	.ndo_stop		= hplance_close,
 	.ndo_start_xmit		= lance_start_xmit,
 	.ndo_set_rx_mode	= lance_set_multicast,
 	.ndo_validate_addr	= eth_validate_addr,
 	.ndo_set_mac_address	= eth_mac_addr,
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= lance_poll,
 #endif
 };

 /* Find all the HP Lance boards and initialise them... */
 static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent)
 {
 	struct net_device *dev;
 	int err = -ENOMEM;

 	dev = alloc_etherdev(sizeof(struct hplance_private));
 	if (!dev)
 		goto out;

 	err = -EBUSY;
 	if (!request_mem_region(dio_resource_start(d),
 				dio_resource_len(d), d->name))
 		goto out_free_netdev;

 	hplance_init(dev, d);
 	err = register_netdev(dev);
 	if (err)
 		goto out_release_mem_region;

 	dio_set_drvdata(d, dev);

 	printk(KERN_INFO "%s: %s; select code %d, addr %pM, irq %d\n",
 	       dev->name, d->name, d->scode, dev->dev_addr, d->ipl);

 	return 0;

  out_release_mem_region:
 	release_mem_region(dio_resource_start(d), dio_resource_len(d));
  out_free_netdev:
 	free_netdev(dev);
  out:
 	return err;
 }

 static void hplance_remove_one(struct dio_dev *d)
 {
 	struct net_device *dev = dio_get_drvdata(d);

 	unregister_netdev(dev);
 	release_mem_region(dio_resource_start(d), dio_resource_len(d));
 	free_netdev(dev);
 }

 /* Initialise a single lance board at the given DIO device */
 static void hplance_init(struct net_device *dev, struct dio_dev *d)
 {
 	unsigned long va = (d->resource.start + DIO_VIRADDRBASE);
 	struct hplance_private *lp;
 	u8 addr[ETH_ALEN];
 	int i;

 	/* reset the board */
 	out_8(va + DIO_IDOFF, 0xff);
 	udelay(100);                              /* ariba! ariba! udelay! udelay! */

 	/* Fill the dev fields */
 	dev->base_addr = va;
 	dev->netdev_ops = &hplance_netdev_ops;
 	dev->dma = 0;

 	for (i = 0; i < 6; i++) {
 		/* The NVRAM holds our ethernet address, one nibble per byte,
 		 * at bytes NVRAMOFF+1,3,5,7,9...
 		 */
 		addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)
 			| (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);
 	}
 	eth_hw_addr_set(dev, addr);

 	lp = netdev_priv(dev);
 	lp->lance.name = d->name;
 	lp->lance.base = va;
 	lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */
 	lp->lance.lance_init_block = NULL;              /* LANCE addr of same RAM */
 	lp->lance.busmaster_regval = LE_C3_BSWP;        /* we're bigendian */
 	lp->lance.irq = d->ipl;
 	lp->lance.writerap = hplance_writerap;
 	lp->lance.writerdp = hplance_writerdp;
 	lp->lance.readrdp = hplance_readrdp;
 	lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
 	lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
 	lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
 	lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
 }

 /* This is disgusting. We have to check the DIO status register for ack every
  * time we read or write the LANCE registers.
  */
 static void hplance_writerap(void *priv, unsigned short value)
 {
 	struct lance_private *lp = (struct lance_private *)priv;

 	do {
 		out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
 	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
 }

 static void hplance_writerdp(void *priv, unsigned short value)
 {
 	struct lance_private *lp = (struct lance_private *)priv;

 	do {
 		out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
 	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
 }

 static unsigned short hplance_readrdp(void *priv)
 {
 	struct lance_private *lp = (struct lance_private *)priv;
 	__u16 value;

 	do {
 		value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
 	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
 	return value;
 }

 static int hplance_open(struct net_device *dev)
 {
 	int status;
 	struct lance_private *lp = netdev_priv(dev);

 	status = lance_open(dev);                 /* call generic lance open code */
 	if (status)
 		return status;
 	/* enable interrupts at board level. */
 	out_8(lp->base + HPLANCE_STATUS, LE_IE);

 	return 0;
 }

 static int hplance_close(struct net_device *dev)
 {
 	struct lance_private *lp = netdev_priv(dev);

 	out_8(lp->base + HPLANCE_STATUS, 0);	/* disable interrupts at boardlevel */
 	lance_close(dev);
 	return 0;
 }

 static int __init hplance_init_module(void)
 {
 	return dio_register_driver(&hplance_driver);
 }

 static void __exit hplance_cleanup_module(void)
 {
 	dio_unregister_driver(&hplance_driver);
 }

 module_init(hplance_init_module);
 module_exit(hplance_cleanup_module);

 MODULE_DESCRIPTION("HP300 on-board LANCE Ethernet driver");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0-only
	/* hplance.c : the Linux/hp300/lance ethernet driver
	*
	* Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
	* Based on the Sun Lance driver and the NetBSD HP Lance driver
	* Uses the generic 7990.c LANCE code.
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/types.h>
	#include <linux/interrupt.h>
	#include <linux/ioport.h>
	#include <linux/string.h>
	#include <linux/delay.h>
	#include <linux/init.h>
	#include <linux/errno.h>
	#include <linux/pgtable.h>
	/* Used for the temporal inet entries and routing */
	#include <linux/socket.h>
	#include <linux/route.h>
	#include <linux/dio.h>
	#include <linux/netdevice.h>
	#include <linux/etherdevice.h>
	#include <linux/skbuff.h>

	#include <asm/io.h>

	#include "hplance.h"

	/* We have 16392 bytes of RAM for the init block and buffers. This places
	* an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
	* buffers and 2 Tx buffers, it takes (8 + 2) * 1544 bytes.
	*/
	#define LANCE_LOG_TX_BUFFERS 1
	#define LANCE_LOG_RX_BUFFERS 3

	#include "7990.h" /* use generic LANCE code */

	/* Our private data structure */
	struct hplance_private {
	struct lance_private lance;
	};

	/* function prototypes... This is easy because all the grot is in the
	* generic LANCE support. All we have to support is probing for boards,
	* plus board-specific init, open and close actions.
	* Oh, and we need to tell the generic code how to read and write LANCE registers...
	*/
	static int hplance_init_one(struct dio_dev d, const struct dio_device_id ent);
	static void hplance_init(struct net_device dev, struct dio_dev d);
	static void hplance_remove_one(struct dio_dev *d);
	static void hplance_writerap(void *priv, unsigned short value);
	static void hplance_writerdp(void *priv, unsigned short value);
	static unsigned short hplance_readrdp(void *priv);
	static int hplance_open(struct net_device *dev);
	static int hplance_close(struct net_device *dev);

	static struct dio_device_id hplance_dio_tbl[] = {
	{ DIO_ID_LAN },
	{ 0 }
	};

	static struct dio_driver hplance_driver = {
	.name = "hplance",
	.id_table = hplance_dio_tbl,
	.probe = hplance_init_one,
	.remove = hplance_remove_one,
	};

	static const struct net_device_ops hplance_netdev_ops = {
	.ndo_open = hplance_open,
	.ndo_stop = hplance_close,
	.ndo_start_xmit = lance_start_xmit,
	.ndo_set_rx_mode = lance_set_multicast,
	.ndo_validate_addr = eth_validate_addr,
	.ndo_set_mac_address = eth_mac_addr,
	#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller = lance_poll,
	#endif
	};

	/* Find all the HP Lance boards and initialise them... */
	static int hplance_init_one(struct dio_dev d, const struct dio_device_id ent)
	{
	struct net_device *dev;
	int err = -ENOMEM;

	dev = alloc_etherdev(sizeof(struct hplance_private));
	if (!dev)
	goto out;

	err = -EBUSY;
	if (!request_mem_region(dio_resource_start(d),
	dio_resource_len(d), d->name))
	goto out_free_netdev;

	hplance_init(dev, d);
	err = register_netdev(dev);
	if (err)
	goto out_release_mem_region;

	dio_set_drvdata(d, dev);

	printk(KERN_INFO "%s: %s; select code %d, addr %pM, irq %d\n",
	dev->name, d->name, d->scode, dev->dev_addr, d->ipl);

	return 0;

	out_release_mem_region:
	release_mem_region(dio_resource_start(d), dio_resource_len(d));
	out_free_netdev:
	free_netdev(dev);
	out:
	return err;
	}

	static void hplance_remove_one(struct dio_dev *d)
	{
	struct net_device *dev = dio_get_drvdata(d);

	unregister_netdev(dev);
	release_mem_region(dio_resource_start(d), dio_resource_len(d));
	free_netdev(dev);
	}

	/* Initialise a single lance board at the given DIO device */
	static void hplance_init(struct net_device dev, struct dio_dev d)
	{
	unsigned long va = (d->resource.start + DIO_VIRADDRBASE);
	struct hplance_private *lp;
	u8 addr[ETH_ALEN];
	int i;

	/* reset the board */
	out_8(va + DIO_IDOFF, 0xff);
	udelay(100); /* ariba! ariba! udelay! udelay! */

	/* Fill the dev fields */
	dev->base_addr = va;
	dev->netdev_ops = &hplance_netdev_ops;
	dev->dma = 0;

	for (i = 0; i < 6; i++) {
	/* The NVRAM holds our ethernet address, one nibble per byte,
	* at bytes NVRAMOFF+1,3,5,7,9...
	*/
	addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)
	\| (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);
	}
	eth_hw_addr_set(dev, addr);

	lp = netdev_priv(dev);
	lp->lance.name = d->name;
	lp->lance.base = va;
	lp->lance.init_block = (struct lance_init_block )(va + HPLANCE_MEMOFF); / CPU addr */
	lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */
	lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */
	lp->lance.irq = d->ipl;
	lp->lance.writerap = hplance_writerap;
	lp->lance.writerdp = hplance_writerdp;
	lp->lance.readrdp = hplance_readrdp;
	lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
	lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
	lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
	lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
	}

	/* This is disgusting. We have to check the DIO status register for ack every
	* time we read or write the LANCE registers.
	*/
	static void hplance_writerap(void *priv, unsigned short value)
	{
	struct lance_private lp = (struct lance_private )priv;

	do {
	out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	}

	static void hplance_writerdp(void *priv, unsigned short value)
	{
	struct lance_private lp = (struct lance_private )priv;

	do {
	out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	}

	static unsigned short hplance_readrdp(void *priv)
	{
	struct lance_private lp = (struct lance_private )priv;
	__u16 value;

	do {
	value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
	} while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
	return value;
	}

	static int hplance_open(struct net_device *dev)
	{
	int status;
	struct lance_private *lp = netdev_priv(dev);

	status = lance_open(dev); /* call generic lance open code */
	if (status)
	return status;
	/* enable interrupts at board level. */
	out_8(lp->base + HPLANCE_STATUS, LE_IE);

	return 0;
	}

	static int hplance_close(struct net_device *dev)
	{
	struct lance_private *lp = netdev_priv(dev);

	out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */
	lance_close(dev);
	return 0;
	}

	static int __init hplance_init_module(void)
	{
	return dio_register_driver(&hplance_driver);
	}

	static void __exit hplance_cleanup_module(void)
	{
	dio_unregister_driver(&hplance_driver);
	}

	module_init(hplance_init_module);
	module_exit(hplance_cleanup_module);

	MODULE_DESCRIPTION("HP300 on-board LANCE Ethernet driver");
	MODULE_LICENSE("GPL");