Here's a snippet from a program I use to debug an ethernet driver that I
have using ioctl's. The ethernet ioctl interface is slightly different
from a "normal" ioctl in that it uses sockets and not a file descriptor.
The ioctl's I use are added to the ioctl interface in the driver, using
the defined device-specific range (that was supposed to disappear in
2.5.x or 2.6.x). With this I read/write my phy register's to test out
the interface between my TEMAC and my PHY.
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <net/if.h>
#include <linux/sockios.h>
int main (int argc, char **argv)
{
int driver_fd = -1;
int cmd = 0;
int res;
char* buffer = NULL;
struct ifreq ifr;
if (argc < 3)
{
printf ("Usage %s <devname> <ioctl>\n", argv [0]);
exit (1);
}
driver_fd = socket(AF_INET, SOCK_DGRAM, 0);
if (driver_fd == -1)
{
printf ("Could not open %s: %s\n", TEMAC_DRIVER_NAME, strerror
(errno));
exit (1);
}
memset(&ifr, 0, sizeof(struct ifreq));
strcpy(ifr.ifr_name, argv[1]);
cmd = atoi (argv [2]);
if (SIOCDEVPRIVATE + 3 == cmd) {
if (argc != 4) {
printf("usage %s <devname> 35315 <phy reg>\n", argv[0]);
exit(1);
}
ifr.ifr_ifindex = atoi(argv[3]);
}
if (SIOCDEVPRIVATE + 4 == cmd) {
if (argc != 5) {
printf("usage %s <devname> 35316 <phy reg> <val>\n", argv[0]);
exit(1);
}
ifr.ifr_ifindex = atoi(argv[3]) << 16;
ifr.ifr_ifindex |= atoi(argv[4]);
}
printf("Performing ioctl %d:\n", cmd);
res = ioctl(driver_fd, cmd, &ifr);
if (res == -1)
{
printf ("Error from %d: %s\n", driver_fd, strerror (errno));
exit (1);
}
return 0;
}
-----Original Message-----
From: John Linn [mailto:[EMAIL PROTECTED]
Sent: Thursday, March 06, 2008 5:15 PM
To: khollan; [email protected]
Subject: RE: Xilinx Temac link detect
Hi Kevin,
I couldn't find any example laying around, so I took a shot at it based
on other non-network examples we had. I've not personally done it so
bear that in mind.
I have not tried to compile any of this, just stole parts for places and
pasted in.
Hope it helps,
John
#include <ioctl.h>
/*
* FD of the IIC device opened.
*/
int Fdtemac;
struct mii_ioctl_data ioctl_data;
/*
* Open the device.
*/
Fdtemac = open("/dev/TBD", O_RDWR);
if(Fdtemac < 0)
{
printf("Cannot open the temac device\n");
return -1;
}
/* setup the inputs to the ioctl call */
ioctl_data.phy_num = TBD;
ioctl_data.reg_num = TBD;
/*
* Read the phy register
*/
Register = ioctl(Fdtemac, SIOCGMIIREG, &ioctl_data);
if(Status < 0)
{
/* failure */
return 0;
}
/* results should be in ioctl_data.val_out I think
}
>From the temac linux adapter, a snippet showing the the ioctl function.
xenet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) {
struct mii_ioctl_data *data = (struct mii_ioctl_data *)
&rq->ifr_data;
case SIOCGMIIREG: /* Read GMII PHY register. */
ret = XTemac_PhyRead(&lp->Emac, data->phy_id,
data->reg_num, &data->val_out); }
from linux/mii.h
/* This structure is used in all SIOCxMIIxxx ioctl calls */ struct
mii_ioctl_data {
__u16 phy_id;
__u16 reg_num;
__u16 val_in;
__u16 val_out;
};
from linux/if.h
struct ifreq
{
#define IFHWADDRLEN 6
union
{
char ifrn_name[IFNAMSIZ]; /* if name, e.g.
"en0" */
} ifr_ifrn;
union {
struct sockaddr ifru_addr;
struct sockaddr ifru_dstaddr;
struct sockaddr ifru_broadaddr;
struct sockaddr ifru_netmask;
struct sockaddr ifru_hwaddr;
short ifru_flags;
int ifru_ivalue;
int ifru_mtu;
struct ifmap ifru_map;
char ifru_slave[IFNAMSIZ]; /* Just fits the size */
char ifru_newname[IFNAMSIZ];
void __user * ifru_data;
struct if_settings ifru_settings;
} ifr_ifru;
};
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of khollan
Sent: Thursday, March 06, 2008 1:44 PM
To: [email protected]
Subject: Re: Xilinx Temac link detect
I figure I could write a C program to talk to the ioctl in the TEMAC
driver and read the PHY register. Does anyone have example code for
talking to network ioctl's?
Thanks
Kevin
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