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/* drivers/atm/uPD98402.c - NEC uPD98402 (PHY) declarations */
/* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */
#include <linux/module.h>
#include <linux/sched.h> /* for jiffies */
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/atmdev.h>
#include <linux/sonet.h>
#include <linux/init.h>
#include <asm/uaccess.h>
#include "uPD98402.h"
#if 0
#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
#else
#define DPRINTK(format,args...)
#endif
struct uPD98402_priv {
struct sonet_stats sonet_stats; /* link diagnostics */
unsigned char framing; /* SONET/SDH framing */
};
#define PRIV(dev) ((struct uPD98402_priv *) dev->phy_data)
#define PUT(val,reg) dev->ops->phy_put(dev,val,uPD98402_##reg)
#define GET(reg) dev->ops->phy_get(dev,uPD98402_##reg)
static int fetch_stats(struct atm_dev *dev,struct sonet_stats *arg,int zero)
{
unsigned long flags;
int error;
error = 0;
save_flags(flags);
cli();
PRIV(dev)->sonet_stats.uncorr_hcs += GET(HECCT);
if (arg)
error = copy_to_user(arg,&PRIV(dev)->sonet_stats,
sizeof(struct sonet_stats));
if (zero && !error) {
memset(&PRIV(dev)->sonet_stats,0,sizeof(struct sonet_stats));
PRIV(dev)->sonet_stats.corr_hcs = -1;
PRIV(dev)->sonet_stats.tx_cells = -1;
PRIV(dev)->sonet_stats.rx_cells = -1;
}
restore_flags(flags);
return error ? -EFAULT : 0;
}
static int set_framing(struct atm_dev *dev,unsigned char framing)
{
static const unsigned char sonet[] = { 1,2,3,0 };
static const unsigned char sdh[] = { 1,0,0,2 };
const char *set;
unsigned long flags;
switch (framing) {
case SONET_FRAME_SONET:
set = sonet;
break;
case SONET_FRAME_SDH:
set = sdh;
break;
default:
return -EINVAL;
}
save_flags(flags);
cli();
PUT(set[0],C11T);
PUT(set[1],C12T);
PUT(set[2],C13T);
PUT((GET(MDR) & ~uPD98402_MDR_SS_MASK) | (set[3] <<
uPD98402_MDR_SS_SHIFT),MDR);
restore_flags(flags);
return 0;
}
static int get_sense(struct atm_dev *dev,u8 *arg)
{
unsigned long flags;
int error;
save_flags(flags);
cli();
error = put_user(GET(C11R),arg) || put_user(GET(C12R),arg+1) ||
put_user(GET(C13R),arg+2);
restore_flags(flags);
error = error || put_user(0xff,arg+3) || put_user(0xff,arg+4) ||
put_user(0xff,arg+5);
return error ? -EFAULT : 0;
}
static int uPD98402_ioctl(struct atm_dev *dev,unsigned int cmd,void *arg)
{
switch (cmd) {
case SONET_GETSTATZ:
case SONET_GETSTAT:
return fetch_stats(dev,(struct sonet_stats *) arg,
cmd == SONET_GETSTATZ);
case SONET_SETFRAMING:
return set_framing(dev,(int) arg);
case SONET_GETFRAMING:
return put_user(PRIV(dev)->framing,(int *) arg) ?
-EFAULT : 0;
case SONET_GETFRSENSE:
return get_sense(dev,arg);
default:
return -EINVAL;
}
}
static void stat_event(struct atm_dev *dev)
{
unsigned char events;
events = GET(PCR);
if (events & uPD98402_PFM_PFEB)
if ((PRIV(dev)->sonet_stats.path_febe += GET(PFECB)) < 0)
PRIV(dev)->sonet_stats.path_febe = LONG_MAX;
if (events & uPD98402_PFM_LFEB)
if ((PRIV(dev)->sonet_stats.line_febe += GET(LECCT)) < 0)
PRIV(dev)->sonet_stats.line_febe = LONG_MAX;
if (events & uPD98402_PFM_B3E)
if ((PRIV(dev)->sonet_stats.path_bip += GET(B3ECT)) < 0)
PRIV(dev)->sonet_stats.path_bip = LONG_MAX;
if (events & uPD98402_PFM_B2E)
if ((PRIV(dev)->sonet_stats.line_bip += GET(B2ECT)) < 0)
PRIV(dev)->sonet_stats.line_bip = LONG_MAX;
if (events & uPD98402_PFM_B1E)
if ((PRIV(dev)->sonet_stats.section_bip += GET(B1ECT)) < 0)
PRIV(dev)->sonet_stats.section_bip = LONG_MAX;
}
static void uPD98402_int(struct atm_dev *dev)
{
static unsigned long silence = 0;
unsigned char reason;
while ((reason = GET(PICR))) {
if (reason & uPD98402_INT_LOS)
printk(KERN_NOTICE "%s(itf %d): signal lost\n",
dev->type,dev->number);
if (reason & uPD98402_INT_PFM) stat_event(dev);
if (reason & uPD98402_INT_PCO) {
(void) GET(PCOCR); /* clear interrupt cause */
PRIV(dev)->sonet_stats.uncorr_hcs += GET(HECCT);
}
if ((reason & uPD98402_INT_RFO) &&
(time_after(jiffies, silence) || silence == 0)) {
printk(KERN_WARNING "%s(itf %d): uPD98402 receive "
"FIFO overflow\n",dev->type,dev->number);
silence = (jiffies+HZ/2)|1;
}
}
}
static int uPD98402_start(struct atm_dev *dev)
{
DPRINTK("phy_start\n");
if (!(PRIV(dev) = kmalloc(sizeof(struct uPD98402_priv),GFP_KERNEL)))
return -ENOMEM;
memset(&PRIV(dev)->sonet_stats,0,sizeof(struct sonet_stats));
(void) GET(PCR); /* clear performance events */
PUT(uPD98402_PFM_FJ,PCMR); /* ignore frequency adj */
(void) GET(PCOCR); /* clear overflows */
PUT(~uPD98402_PCO_HECC,PCOMR);
(void) GET(PICR); /* clear interrupts */
PUT(~(uPD98402_INT_PFM | uPD98402_INT_ALM | uPD98402_INT_RFO |
uPD98402_INT_LOS),PIMR); /* enable them */
(void) fetch_stats(dev,NULL,1); /* clear kernel counters */
return 0;
}
static const struct atmphy_ops uPD98402_ops = {
uPD98402_start,
uPD98402_ioctl, /* no ioctl yet */
uPD98402_int
};
int __init uPD98402_init(struct atm_dev *dev)
{
DPRINTK("phy_init\n");
dev->phy = &uPD98402_ops;
return 0;
}
#ifdef MODULE
EXPORT_SYMBOL(uPD98402_init);
int init_module(void)
{
MOD_INC_USE_COUNT;
return 0;
}
void cleanup_module(void)
{
/* Nay */
}
#endif
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