aboutsummaryrefslogtreecommitdiff
path: root/drivers/atm/uPD98402.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/atm/uPD98402.c
downloadlinux-stericsson-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/atm/uPD98402.c')
-rw-r--r--drivers/atm/uPD98402.c265
1 files changed, 265 insertions, 0 deletions
diff --git a/drivers/atm/uPD98402.c b/drivers/atm/uPD98402.c
new file mode 100644
index 000000000000..9504cce51bfb
--- /dev/null
+++ b/drivers/atm/uPD98402.c
@@ -0,0 +1,265 @@
+/* drivers/atm/uPD98402.c - NEC uPD98402 (PHY) declarations */
+
+/* Written 1995-2000 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 <asm/atomic.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 k_sonet_stats sonet_stats;/* link diagnostics */
+ unsigned char framing; /* SONET/SDH framing */
+ int loop_mode; /* loopback mode */
+ spinlock_t lock;
+};
+
+
+#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 __user *arg,int zero)
+{
+ struct sonet_stats tmp;
+ int error = 0;
+
+ atomic_add(GET(HECCT),&PRIV(dev)->sonet_stats.uncorr_hcs);
+ sonet_copy_stats(&PRIV(dev)->sonet_stats,&tmp);
+ if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
+ if (zero && !error) {
+ /* unused fields are reported as -1, but we must not "adjust"
+ them */
+ tmp.corr_hcs = tmp.tx_cells = tmp.rx_cells = 0;
+ sonet_subtract_stats(&PRIV(dev)->sonet_stats,&tmp);
+ }
+ 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;
+ }
+ spin_lock_irqsave(&PRIV(dev)->lock, flags);
+ 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);
+ spin_unlock_irqrestore(&PRIV(dev)->lock, flags);
+ return 0;
+}
+
+
+static int get_sense(struct atm_dev *dev,u8 __user *arg)
+{
+ unsigned long flags;
+ unsigned char s[3];
+
+ spin_lock_irqsave(&PRIV(dev)->lock, flags);
+ s[0] = GET(C11R);
+ s[1] = GET(C12R);
+ s[2] = GET(C13R);
+ spin_unlock_irqrestore(&PRIV(dev)->lock, flags);
+ return (put_user(s[0], arg) || put_user(s[1], arg+1) ||
+ put_user(s[2], arg+2) || put_user(0xff, arg+3) ||
+ put_user(0xff, arg+4) || put_user(0xff, arg+5)) ? -EFAULT : 0;
+}
+
+
+static int set_loopback(struct atm_dev *dev,int mode)
+{
+ unsigned char mode_reg;
+
+ mode_reg = GET(MDR) & ~(uPD98402_MDR_TPLP | uPD98402_MDR_ALP |
+ uPD98402_MDR_RPLP);
+ switch (__ATM_LM_XTLOC(mode)) {
+ case __ATM_LM_NONE:
+ break;
+ case __ATM_LM_PHY:
+ mode_reg |= uPD98402_MDR_TPLP;
+ break;
+ case __ATM_LM_ATM:
+ mode_reg |= uPD98402_MDR_ALP;
+ break;
+ default:
+ return -EINVAL;
+ }
+ switch (__ATM_LM_XTRMT(mode)) {
+ case __ATM_LM_NONE:
+ break;
+ case __ATM_LM_PHY:
+ mode_reg |= uPD98402_MDR_RPLP;
+ break;
+ default:
+ return -EINVAL;
+ }
+ PUT(mode_reg,MDR);
+ PRIV(dev)->loop_mode = mode;
+ return 0;
+}
+
+
+static int uPD98402_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
+{
+ switch (cmd) {
+
+ case SONET_GETSTATZ:
+ case SONET_GETSTAT:
+ return fetch_stats(dev,arg, cmd == SONET_GETSTATZ);
+ case SONET_SETFRAMING:
+ return set_framing(dev, (int)(unsigned long)arg);
+ case SONET_GETFRAMING:
+ return put_user(PRIV(dev)->framing,(int __user *)arg) ?
+ -EFAULT : 0;
+ case SONET_GETFRSENSE:
+ return get_sense(dev,arg);
+ case ATM_SETLOOP:
+ return set_loopback(dev, (int)(unsigned long)arg);
+ case ATM_GETLOOP:
+ return put_user(PRIV(dev)->loop_mode,(int __user *)arg) ?
+ -EFAULT : 0;
+ case ATM_QUERYLOOP:
+ return put_user(ATM_LM_LOC_PHY | ATM_LM_LOC_ATM |
+ ATM_LM_RMT_PHY,(int __user *)arg) ? -EFAULT : 0;
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+
+#define ADD_LIMITED(s,v) \
+ { atomic_add(GET(v),&PRIV(dev)->sonet_stats.s); \
+ if (atomic_read(&PRIV(dev)->sonet_stats.s) < 0) \
+ atomic_set(&PRIV(dev)->sonet_stats.s,INT_MAX); }
+
+
+static void stat_event(struct atm_dev *dev)
+{
+ unsigned char events;
+
+ events = GET(PCR);
+ if (events & uPD98402_PFM_PFEB) ADD_LIMITED(path_febe,PFECB);
+ if (events & uPD98402_PFM_LFEB) ADD_LIMITED(line_febe,LECCT);
+ if (events & uPD98402_PFM_B3E) ADD_LIMITED(path_bip,B3ECT);
+ if (events & uPD98402_PFM_B2E) ADD_LIMITED(line_bip,B2ECT);
+ if (events & uPD98402_PFM_B1E) ADD_LIMITED(section_bip,B1ECT);
+}
+
+
+#undef ADD_LIMITED
+
+
+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 */
+ atomic_add(GET(HECCT),
+ &PRIV(dev)->sonet_stats.uncorr_hcs);
+ }
+ 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 (!(dev->dev_data = kmalloc(sizeof(struct uPD98402_priv),GFP_KERNEL)))
+ return -ENOMEM;
+ spin_lock_init(&PRIV(dev)->lock);
+ memset(&PRIV(dev)->sonet_stats,0,sizeof(struct k_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 */
+ atomic_set(&PRIV(dev)->sonet_stats.corr_hcs,-1);
+ atomic_set(&PRIV(dev)->sonet_stats.tx_cells,-1);
+ atomic_set(&PRIV(dev)->sonet_stats.rx_cells,-1);
+ return 0;
+}
+
+
+static int uPD98402_stop(struct atm_dev *dev)
+{
+ /* let SAR driver worry about stopping interrupts */
+ kfree(PRIV(dev));
+ return 0;
+}
+
+
+static const struct atmphy_ops uPD98402_ops = {
+ .start = uPD98402_start,
+ .ioctl = uPD98402_ioctl,
+ .interrupt = uPD98402_int,
+ .stop = uPD98402_stop,
+};
+
+
+int uPD98402_init(struct atm_dev *dev)
+{
+DPRINTK("phy_init\n");
+ dev->phy = &uPD98402_ops;
+ return 0;
+}
+
+
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(uPD98402_init);
+
+static __init int uPD98402_module_init(void)
+{
+ return 0;
+}
+module_init(uPD98402_module_init);
+/* module_exit not defined so not unloadable */