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linux-sg2042/drivers/net/jazzsonic.c

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/*
* 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/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 <asm/bootinfo.h>
#include <asm/system.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)
/* use 0 for production, 1 for verification, >1 for debug */
#ifdef SONIC_DEBUG
static unsigned int sonic_debug = SONIC_DEBUG;
#else
static unsigned int sonic_debug = 1;
#endif
/*
* 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, IRQF_DISABLED,
"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;
}
static int jazzsonic_close(struct net_device* dev)
{
int err;
err = sonic_close(dev);
free_irq(dev->irq, dev);
return err;
}
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_multicast_list = sonic_multicast_list,
.ndo_tx_timeout = sonic_tx_timeout,
.ndo_change_mtu = eth_change_mtu,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
};
static int __devinit sonic_probe1(struct net_device *dev)
{
static unsigned version_printed;
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);
if (sonic_debug > 1)
printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
i = 0;
while (known_revisions[i] != 0xffff &&
known_revisions[i] != silicon_revision)
i++;
if (known_revisions[i] == 0xffff) {
printk("SONIC ethernet controller not found (0x%4x)\n",
silicon_revision);
goto out;
}
if (sonic_debug && version_printed++ == 0)
printk(version);
printk(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ",
dev_name(lp->device), dev->base_addr);
/*
* 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. */
if ((lp->descriptors = dma_alloc_coherent(lp->device,
SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
&lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n",
dev_name(lp->device));
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;
}
/*
* Probe for a SONIC ethernet controller on a Mips Jazz board.
* Actually probing is superfluous but we're paranoid.
*/
static int __devinit 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;
err = register_netdev(dev);
if (err)
goto out1;
printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
return 0;
out1:
release_mem_region(dev->base_addr, SONIC_MEM_SIZE);
out:
free_netdev(dev);
return err;
}
MODULE_DESCRIPTION("Jazz SONIC ethernet driver");
module_param(sonic_debug, int, 0);
MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)");
MODULE_ALIAS("platform:jazzsonic");
#include "sonic.c"
static int __devexit 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;
}
static struct platform_driver jazz_sonic_driver = {
.probe = jazz_sonic_probe,
.remove = __devexit_p(jazz_sonic_device_remove),
.driver = {
.name = jazz_sonic_string,
.owner = THIS_MODULE,
},
};
static int __init jazz_sonic_init_module(void)
{
return platform_driver_register(&jazz_sonic_driver);
}
static void __exit jazz_sonic_cleanup_module(void)
{
platform_driver_unregister(&jazz_sonic_driver);
}
module_init(jazz_sonic_init_module);
module_exit(jazz_sonic_cleanup_module);
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