Release 4.18 drivers/net/ethernet/natsemi/jazzsonic.c

// SPDX-License-Identifier: GPL-2.0
/*
 * jazzsonic.c
 *
 * (C) 2005 Finn Thain
 *
 * Converted to DMA API, and (from the mac68k project) introduced
 * dhd's support for 16-bit cards.
 *
 * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
 *
 * This driver is based on work from Andreas Busse, but most of
 * the code is rewritten.
 *
 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
 *
 * A driver for the onboard Sonic ethernet controller on Mips Jazz
 * systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and
 * perhaps others, too)
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/gfp.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>

#include <asm/bootinfo.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/jazz.h>
#include <asm/jazzdma.h>


static char jazz_sonic_string[] = "jazzsonic";


#define SONIC_MEM_SIZE	0x100

#include "sonic.h"

/*
 * Macros to access SONIC registers
 */

#define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg))


#define SONIC_WRITE(reg,val)						\
do {                                                                    \
        *((volatile unsigned int *)dev->base_addr+(reg)) = (val);               \
} while (0)

/*
 * We cannot use station (ethernet) address prefixes to detect the
 * sonic controller since these are board manufacturer depended.
 * So we check for known Silicon Revision IDs instead.
 */

static unsigned short known_revisions[] =
{
	0x04,			/* Mips Magnum 4000 */
	0xffff			/* end of list */
};



static int jazzsonic_open(struct net_device* dev)
{
	int retval;

	retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev);
	if (retval) {
		printk(KERN_ERR "%s: unable to get IRQ %d.\n",
				dev->name, dev->irq);
		return retval;
	}

	retval = sonic_open(dev);
	if (retval)
		free_irq(dev->irq, dev);
	return retval;
}

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Finn Thain
48
62.34%
1
33.33%
Vasiliy Kulikov
28
36.36%
1
33.33%
Michael Opdenacker
1
1.30%
1
33.33%
Total
77
100.00%
3
100.00%



static int jazzsonic_close(struct net_device* dev)
{
	int err;
	err = sonic_close(dev);
	free_irq(dev->irq, dev);
	return err;
}

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1
100.00%


static const struct net_device_ops sonic_netdev_ops = {
	.ndo_open		= jazzsonic_open,
	.ndo_stop		= jazzsonic_close,
	.ndo_start_xmit		= sonic_send_packet,
	.ndo_get_stats		= sonic_get_stats,
	.ndo_set_rx_mode	= sonic_multicast_list,
	.ndo_tx_timeout		= sonic_tx_timeout,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= eth_mac_addr,
};



static int sonic_probe1(struct net_device *dev)
{
	unsigned int silicon_revision;
	unsigned int val;
	struct sonic_local *lp = netdev_priv(dev);
	int err = -ENODEV;
	int i;

	if (!request_mem_region(dev->base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
		return -EBUSY;

	/*
         * get the Silicon Revision ID. If this is one of the known
         * one assume that we found a SONIC ethernet controller at
         * the expected location.
         */
	silicon_revision = SONIC_READ(SONIC_SR);
	i = 0;
	while (known_revisions[i] != 0xffff &&
	       known_revisions[i] != silicon_revision)
		i++;

	if (known_revisions[i] == 0xffff) {
		pr_info("SONIC ethernet controller not found (0x%4x)\n",
			silicon_revision);
		goto out;
	}

	/*
         * Put the sonic into software reset, then
         * retrieve and print the ethernet address.
         */
	SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
	SONIC_WRITE(SONIC_CEP,0);
	for (i=0; i<3; i++) {
		val = SONIC_READ(SONIC_CAP0-i);
		dev->dev_addr[i*2] = val;
		dev->dev_addr[i*2+1] = val >> 8;
	}

	err = -ENOMEM;

	/* Initialize the device structure. */

	lp->dma_bitmode = SONIC_BITMODE32;

	/* Allocate the entire chunk of memory for the descriptors.
           Note that this cannot cross a 64K boundary. */
	lp->descriptors = dma_alloc_coherent(lp->device,
					     SIZEOF_SONIC_DESC *
					     SONIC_BUS_SCALE(lp->dma_bitmode),
					     &lp->descriptors_laddr,
					     GFP_KERNEL);
	if (lp->descriptors == NULL)
		goto out;

	/* Now set up the pointers to point to the appropriate places */
	lp->cda = lp->descriptors;
	lp->tda = lp->cda + (SIZEOF_SONIC_CDA
	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
	lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
	lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
	                     * SONIC_BUS_SCALE(lp->dma_bitmode));

	lp->cda_laddr = lp->descriptors_laddr;
	lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
	lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
	                     * SONIC_BUS_SCALE(lp->dma_bitmode));
	lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
	                     * SONIC_BUS_SCALE(lp->dma_bitmode));

	dev->netdev_ops = &sonic_netdev_ops;
	dev->watchdog_timeo = TX_TIMEOUT;

	/*
         * clear tally counter
         */
	SONIC_WRITE(SONIC_CRCT,0xffff);
	SONIC_WRITE(SONIC_FAET,0xffff);
	SONIC_WRITE(SONIC_MPT,0xffff);

	return 0;
out:
	release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
	return err;
}

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Linus Torvalds (pre-git)
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2
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Finn Thain
111
26.75%
2
20.00%
Ralf Bächle
106
25.54%
1
10.00%
Stephen Hemminger
31
7.47%
1
10.00%
Joe Perches
6
1.45%
1
10.00%
Linus Torvalds
5
1.20%
1
10.00%
Alexander Beregalov
2
0.48%
1
10.00%
Julia Lawall
1
0.24%
1
10.00%
Total
415
100.00%
10
100.00%

/*
 * Probe for a SONIC ethernet controller on a Mips Jazz board.
 * Actually probing is superfluous but we're paranoid.
 */


static int jazz_sonic_probe(struct platform_device *pdev)
{
	struct net_device *dev;
	struct sonic_local *lp;
	struct resource *res;
	int err = 0;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res)
		return -ENODEV;

	dev = alloc_etherdev(sizeof(struct sonic_local));
	if (!dev)
		return -ENOMEM;

	lp = netdev_priv(dev);
	lp->device = &pdev->dev;
	SET_NETDEV_DEV(dev, &pdev->dev);
	platform_set_drvdata(pdev, dev);

	netdev_boot_setup_check(dev);

	dev->base_addr = res->start;
	dev->irq = platform_get_irq(pdev, 0);
	err = sonic_probe1(dev);
	if (err)
		goto out;

	pr_info("SONIC ethernet @%08lx, MAC %pM, IRQ %d\n",
		dev->base_addr, dev->dev_addr, dev->irq);

	sonic_msg_init(dev);

	err = register_netdev(dev);
	if (err)
		goto out1;

	return 0;

out1:
	release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
out:
	free_netdev(dev);

	return err;
}

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1
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Finn Thain
74
36.63%
4
36.36%
Thomas Bogendoerfer
28
13.86%
1
9.09%
Russell King
10
4.95%
1
9.09%
Stephen Hemminger
7
3.47%
1
9.09%
Linus Torvalds (pre-git)
5
2.48%
1
9.09%
Julia Lawall
1
0.50%
1
9.09%
Joe Perches
1
0.50%
1
9.09%
Total
202
100.00%
11
100.00%

MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
MODULE_ALIAS("platform:jazzsonic");

#include "sonic.c"



static int jazz_sonic_device_remove(struct platform_device *pdev)
{
	struct net_device *dev = platform_get_drvdata(pdev);
	struct sonic_local* lp = netdev_priv(dev);

	unregister_netdev(dev);
	dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
	                  lp->descriptors, lp->descriptors_laddr);
	release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
	free_netdev(dev);

	return 0;
}

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Finn Thain
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44.16%
1
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Russell King
6
7.79%
1
25.00%
Julia Lawall
1
1.30%
1
25.00%
Total
77
100.00%
4
100.00%


static struct platform_driver jazz_sonic_driver = {
	.probe	= jazz_sonic_probe,
	.remove	= jazz_sonic_device_remove,
	.driver	= {
		.name	= jazz_sonic_string,
        },
};

module_platform_driver(jazz_sonic_driver);
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252
24.80%
1
3.57%
Linus Torvalds (pre-git)
239
23.52%
2
7.14%
Alexander Beregalov
49
4.82%
1
3.57%
Stephen Hemminger
38
3.74%
1
3.57%
Russell King
28
2.76%
2
7.14%
Vasiliy Kulikov
28
2.76%
1
3.57%
Thomas Bogendoerfer
28
2.76%
1
3.57%
Arnaldo Carvalho de Melo
9
0.89%
1
3.57%
Joe Perches
7
0.69%
2
7.14%
Tejun Heo
7
0.69%
1
3.57%
Kay Sievers
5
0.49%
1
3.57%
Linus Torvalds
5
0.49%
1
3.57%
Julia Lawall
3
0.30%
1
3.57%
Jeff Garzik
2
0.20%
1
3.57%
Axel Lin
2
0.20%
1
3.57%
Herbert Xu
2
0.20%
1
3.57%
Adrian Bunk
1
0.10%
1
3.57%
Michael Opdenacker
1
0.10%
1
3.57%
Jiri Pirko
1
0.10%
1
3.57%
Greg Kroah-Hartman
1
0.10%
1
3.57%
Total
1016
100.00%
28
100.00%
Directory: drivers/net/ethernet/natsemi

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