274 lines
6.4 KiB
C
274 lines
6.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* xtsonic.c
|
|
*
|
|
* (C) 2001 - 2007 Tensilica Inc.
|
|
* Kevin Chea <kchea@yahoo.com>
|
|
* Marc Gauthier <marc@linux-xtensa.org>
|
|
* Chris Zankel <chris@zankel.net>
|
|
*
|
|
* (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 the XT2000.
|
|
*/
|
|
|
|
#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/init.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 <linux/pgtable.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/dma.h>
|
|
|
|
static char xtsonic_string[] = "xtsonic";
|
|
|
|
extern unsigned xtboard_nvram_valid(void);
|
|
extern void xtboard_get_ether_addr(unsigned char *buf);
|
|
|
|
#include "sonic.h"
|
|
|
|
/*
|
|
* According to the documentation for the Sonic ethernet controller,
|
|
* EOBC should be 760 words (1520 bytes) for 32-bit applications, and,
|
|
* as such, 2 words less than the buffer size. The value for RBSIZE
|
|
* defined in sonic.h, however is only 1520.
|
|
*
|
|
* (Note that in 16-bit configurations, EOBC is 759 words (1518 bytes) and
|
|
* RBSIZE 1520 bytes)
|
|
*/
|
|
#undef SONIC_RBSIZE
|
|
#define SONIC_RBSIZE 1524
|
|
|
|
/*
|
|
* The chip provides 256 byte register space.
|
|
*/
|
|
#define SONIC_MEM_SIZE 0x100
|
|
|
|
/*
|
|
* Macros to access SONIC registers
|
|
*/
|
|
#define SONIC_READ(reg) \
|
|
(0xffff & *((volatile unsigned int *)dev->base_addr+reg))
|
|
|
|
#define SONIC_WRITE(reg,val) \
|
|
*((volatile unsigned int *)dev->base_addr+reg) = val
|
|
|
|
/*
|
|
* 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[] =
|
|
{
|
|
0x101, /* SONIC 83934 */
|
|
0xffff /* end of list */
|
|
};
|
|
|
|
static int xtsonic_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 -EAGAIN;
|
|
}
|
|
|
|
retval = sonic_open(dev);
|
|
if (retval)
|
|
free_irq(dev->irq, dev);
|
|
return retval;
|
|
}
|
|
|
|
static int xtsonic_close(struct net_device *dev)
|
|
{
|
|
int err;
|
|
err = sonic_close(dev);
|
|
free_irq(dev->irq, dev);
|
|
return err;
|
|
}
|
|
|
|
static const struct net_device_ops xtsonic_netdev_ops = {
|
|
.ndo_open = xtsonic_open,
|
|
.ndo_stop = xtsonic_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 __init sonic_probe1(struct net_device *dev)
|
|
{
|
|
unsigned int silicon_revision;
|
|
struct sonic_local *lp = netdev_priv(dev);
|
|
unsigned int base_addr = dev->base_addr;
|
|
int i;
|
|
int err = 0;
|
|
|
|
if (!request_mem_region(base_addr, 0x100, xtsonic_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);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Put the sonic into software reset, then retrieve ethernet address.
|
|
* Note: we are assuming that the boot-loader has initialized the cam.
|
|
*/
|
|
SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
|
|
SONIC_WRITE(SONIC_DCR,
|
|
SONIC_DCR_WC0|SONIC_DCR_DW|SONIC_DCR_LBR|SONIC_DCR_SBUS);
|
|
SONIC_WRITE(SONIC_CEP,0);
|
|
SONIC_WRITE(SONIC_IMR,0);
|
|
|
|
SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
|
|
SONIC_WRITE(SONIC_CEP,0);
|
|
|
|
for (i=0; i<3; i++) {
|
|
unsigned int val = SONIC_READ(SONIC_CAP0-i);
|
|
dev->dev_addr[i*2] = val;
|
|
dev->dev_addr[i*2+1] = val >> 8;
|
|
}
|
|
|
|
lp->dma_bitmode = SONIC_BITMODE32;
|
|
|
|
err = sonic_alloc_descriptors(dev);
|
|
if (err)
|
|
goto out;
|
|
|
|
dev->netdev_ops = &xtsonic_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_region(dev->base_addr, SONIC_MEM_SIZE);
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* Probe for a SONIC ethernet controller on an XT2000 board.
|
|
* Actually probing is superfluous but we're paranoid.
|
|
*/
|
|
|
|
int xtsonic_probe(struct platform_device *pdev)
|
|
{
|
|
struct net_device *dev;
|
|
struct sonic_local *lp;
|
|
struct resource *resmem, *resirq;
|
|
int err = 0;
|
|
|
|
if ((resmem = platform_get_resource(pdev, IORESOURCE_MEM, 0)) == NULL)
|
|
return -ENODEV;
|
|
|
|
if ((resirq = platform_get_resource(pdev, IORESOURCE_IRQ, 0)) == NULL)
|
|
return -ENODEV;
|
|
|
|
if ((dev = alloc_etherdev(sizeof(struct sonic_local))) == NULL)
|
|
return -ENOMEM;
|
|
|
|
lp = netdev_priv(dev);
|
|
lp->device = &pdev->dev;
|
|
platform_set_drvdata(pdev, dev);
|
|
SET_NETDEV_DEV(dev, &pdev->dev);
|
|
|
|
dev->base_addr = resmem->start;
|
|
dev->irq = resirq->start;
|
|
|
|
if ((err = sonic_probe1(dev)))
|
|
goto out;
|
|
|
|
pr_info("SONIC ethernet @%08lx, MAC %pM, IRQ %d\n",
|
|
dev->base_addr, dev->dev_addr, dev->irq);
|
|
|
|
sonic_msg_init(dev);
|
|
|
|
if ((err = register_netdev(dev)))
|
|
goto undo_probe1;
|
|
|
|
return 0;
|
|
|
|
undo_probe1:
|
|
dma_free_coherent(lp->device,
|
|
SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
|
|
lp->descriptors, lp->descriptors_laddr);
|
|
release_region(dev->base_addr, SONIC_MEM_SIZE);
|
|
out:
|
|
free_netdev(dev);
|
|
|
|
return err;
|
|
}
|
|
|
|
MODULE_DESCRIPTION("Xtensa XT2000 SONIC ethernet driver");
|
|
|
|
#include "sonic.c"
|
|
|
|
static int xtsonic_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_region (dev->base_addr, SONIC_MEM_SIZE);
|
|
free_netdev(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver xtsonic_driver = {
|
|
.probe = xtsonic_probe,
|
|
.remove = xtsonic_device_remove,
|
|
.driver = {
|
|
.name = xtsonic_string,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(xtsonic_driver);
|