1 files changed, 390 insertions, 0 deletions
diff --git a/drivers/atm/suni.c b/drivers/atm/suni.c
new file mode 100644
index 000000000..21e5acc76
--- /dev/null
+++ b/drivers/atm/suni.c
@@ -0,0 +1,390 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * drivers/atm/suni.c - S/UNI PHY driver
+ *
+ * Supports the following:
+ * 	PMC PM5346 S/UNI LITE
+ * 	PMC PM5350 S/UNI 155 ULTRA
+ * 	PMC PM5355 S/UNI 622
+ */
+ 
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+#include <linux/module.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/atmdev.h>
+#include <linux/sonet.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/capability.h>
+#include <linux/slab.h>
+#include <asm/param.h>
+#include <linux/uaccess.h>
+#include <linux/atomic.h>
+
+#include "suni.h"
+
+
+#if 0
+#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
+#else
+#define DPRINTK(format,args...)
+#endif
+
+#define PRIV(dev) ((struct suni_priv *) dev->phy_data)
+
+#define PUT(val,reg) dev->ops->phy_put(dev,val,SUNI_##reg)
+#define GET(reg) dev->ops->phy_get(dev,SUNI_##reg)
+#define REG_CHANGE(mask,shift,value,reg) \
+  PUT((GET(reg) & ~(mask)) | ((value) << (shift)),reg)
+
+
+static struct timer_list poll_timer;
+static struct suni_priv *sunis = NULL;
+static DEFINE_SPINLOCK(sunis_lock);
+
+
+#define ADD_LIMITED(s,v) \
+    atomic_add((v),&stats->s); \
+    if (atomic_read(&stats->s) < 0) atomic_set(&stats->s,INT_MAX);
+
+
+static void suni_hz(struct timer_list *timer)
+{
+	struct suni_priv *walk;
+	struct atm_dev *dev;
+	struct k_sonet_stats *stats;
+
+	for (walk = sunis; walk; walk = walk->next) {
+		dev = walk->dev;
+		stats = &walk->sonet_stats;
+		PUT(0,MRI); /* latch counters */
+		udelay(1);
+		ADD_LIMITED(section_bip,(GET(RSOP_SBL) & 0xff) |
+		    ((GET(RSOP_SBM) & 0xff) << 8));
+		ADD_LIMITED(line_bip,(GET(RLOP_LBL) & 0xff) |
+		    ((GET(RLOP_LB) & 0xff) << 8) |
+		    ((GET(RLOP_LBM) & 0xf) << 16));
+		ADD_LIMITED(path_bip,(GET(RPOP_PBL) & 0xff) |
+		    ((GET(RPOP_PBM) & 0xff) << 8));
+		ADD_LIMITED(line_febe,(GET(RLOP_LFL) & 0xff) |
+		    ((GET(RLOP_LF) & 0xff) << 8) |
+		    ((GET(RLOP_LFM) & 0xf) << 16));
+		ADD_LIMITED(path_febe,(GET(RPOP_PFL) & 0xff) |
+		    ((GET(RPOP_PFM) & 0xff) << 8));
+		ADD_LIMITED(corr_hcs,GET(RACP_CHEC) & 0xff);
+		ADD_LIMITED(uncorr_hcs,GET(RACP_UHEC) & 0xff);
+		ADD_LIMITED(rx_cells,(GET(RACP_RCCL) & 0xff) |
+		    ((GET(RACP_RCC) & 0xff) << 8) |
+		    ((GET(RACP_RCCM) & 7) << 16));
+		ADD_LIMITED(tx_cells,(GET(TACP_TCCL) & 0xff) |
+		    ((GET(TACP_TCC) & 0xff) << 8) |
+		    ((GET(TACP_TCCM) & 7) << 16));
+	}
+	if (timer) mod_timer(&poll_timer,jiffies+HZ);
+}
+
+
+#undef ADD_LIMITED
+
+
+static int fetch_stats(struct atm_dev *dev,struct sonet_stats __user *arg,int zero)
+{
+	struct sonet_stats tmp;
+	int error = 0;
+
+	sonet_copy_stats(&PRIV(dev)->sonet_stats,&tmp);
+	if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
+	if (zero && !error) sonet_subtract_stats(&PRIV(dev)->sonet_stats,&tmp);
+	return error ? -EFAULT : 0;
+}
+
+
+#define HANDLE_FLAG(flag,reg,bit) \
+  if (todo & flag) { \
+    if (set) PUT(GET(reg) | bit,reg); \
+    else PUT(GET(reg) & ~bit,reg); \
+    todo &= ~flag; \
+  }
+
+
+static int change_diag(struct atm_dev *dev,void __user *arg,int set)
+{
+	int todo;
+
+	if (get_user(todo,(int __user *)arg)) return -EFAULT;
+	HANDLE_FLAG(SONET_INS_SBIP,TSOP_DIAG,SUNI_TSOP_DIAG_DBIP8);
+	HANDLE_FLAG(SONET_INS_LBIP,TLOP_DIAG,SUNI_TLOP_DIAG_DBIP);
+	HANDLE_FLAG(SONET_INS_PBIP,TPOP_CD,SUNI_TPOP_DIAG_DB3);
+	HANDLE_FLAG(SONET_INS_FRAME,RSOP_CIE,SUNI_RSOP_CIE_FOOF);
+	HANDLE_FLAG(SONET_INS_LAIS,TSOP_CTRL,SUNI_TSOP_CTRL_LAIS);
+	HANDLE_FLAG(SONET_INS_PAIS,TPOP_CD,SUNI_TPOP_DIAG_PAIS);
+	HANDLE_FLAG(SONET_INS_LOS,TSOP_DIAG,SUNI_TSOP_DIAG_DLOS);
+	HANDLE_FLAG(SONET_INS_HCS,TACP_CS,SUNI_TACP_CS_DHCS);
+	return put_user(todo,(int __user *)arg) ? -EFAULT : 0;
+}
+
+
+#undef HANDLE_FLAG
+
+
+static int get_diag(struct atm_dev *dev,void __user *arg)
+{
+	int set;
+
+	set = 0;
+	if (GET(TSOP_DIAG) & SUNI_TSOP_DIAG_DBIP8) set |= SONET_INS_SBIP;
+	if (GET(TLOP_DIAG) & SUNI_TLOP_DIAG_DBIP) set |= SONET_INS_LBIP;
+	if (GET(TPOP_CD) & SUNI_TPOP_DIAG_DB3) set |= SONET_INS_PBIP;
+	/* SONET_INS_FRAME is one-shot only */
+	if (GET(TSOP_CTRL) & SUNI_TSOP_CTRL_LAIS) set |= SONET_INS_LAIS;
+	if (GET(TPOP_CD) & SUNI_TPOP_DIAG_PAIS) set |= SONET_INS_PAIS;
+	if (GET(TSOP_DIAG) & SUNI_TSOP_DIAG_DLOS) set |= SONET_INS_LOS;
+	if (GET(TACP_CS) & SUNI_TACP_CS_DHCS) set |= SONET_INS_HCS;
+	return put_user(set,(int __user *)arg) ? -EFAULT : 0;
+}
+
+
+static int set_loopback(struct atm_dev *dev,int mode)
+{
+	unsigned char control;
+	int reg, dle, lle;
+
+	if (PRIV(dev)->type == SUNI_MRI_TYPE_PM5355) {
+		reg = SUNI_MCM;
+		dle = SUNI_MCM_DLE;
+		lle = SUNI_MCM_LLE;
+	} else {
+		reg = SUNI_MCT;
+		dle = SUNI_MCT_DLE;
+		lle = SUNI_MCT_LLE;
+	}
+
+	control = dev->ops->phy_get(dev, reg) & ~(dle | lle);
+	switch (mode) {
+		case ATM_LM_NONE:
+			break;
+		case ATM_LM_LOC_PHY:
+			control |= dle;
+			break;
+		case ATM_LM_RMT_PHY:
+			control |= lle;
+			break;
+		default:
+			return -EINVAL;
+	}
+	dev->ops->phy_put(dev, control, reg);
+	PRIV(dev)->loop_mode = mode;
+	return 0;
+}
+
+/*
+ * SONET vs. SDH Configuration
+ *
+ * Z0INS (register 0x06): 0 for SONET, 1 for SDH
+ * ENSS (register 0x3D): 0 for SONET, 1 for SDH
+ * LEN16 (register 0x28): 0 for SONET, 1 for SDH (n/a for S/UNI 155 QUAD)
+ * LEN16 (register 0x50): 0 for SONET, 1 for SDH (n/a for S/UNI 155 QUAD)
+ * S[1:0] (register 0x46): 00 for SONET, 10 for SDH
+ */
+
+static int set_sonet(struct atm_dev *dev)
+{
+	if (PRIV(dev)->type == SUNI_MRI_TYPE_PM5355) {
+		PUT(GET(RPOP_RC) & ~SUNI_RPOP_RC_ENSS, RPOP_RC);
+		PUT(GET(SSTB_CTRL) & ~SUNI_SSTB_CTRL_LEN16, SSTB_CTRL);
+		PUT(GET(SPTB_CTRL) & ~SUNI_SPTB_CTRL_LEN16, SPTB_CTRL);
+	}
+
+	REG_CHANGE(SUNI_TPOP_APM_S, SUNI_TPOP_APM_S_SHIFT,
+		   SUNI_TPOP_S_SONET, TPOP_APM);
+
+	return 0;
+}
+
+static int set_sdh(struct atm_dev *dev)
+{
+	if (PRIV(dev)->type == SUNI_MRI_TYPE_PM5355) {
+		PUT(GET(RPOP_RC) | SUNI_RPOP_RC_ENSS, RPOP_RC);
+		PUT(GET(SSTB_CTRL) | SUNI_SSTB_CTRL_LEN16, SSTB_CTRL);
+		PUT(GET(SPTB_CTRL) | SUNI_SPTB_CTRL_LEN16, SPTB_CTRL);
+	}
+
+	REG_CHANGE(SUNI_TPOP_APM_S, SUNI_TPOP_APM_S_SHIFT,
+		   SUNI_TPOP_S_SDH, TPOP_APM);
+
+	return 0;
+}
+
+
+static int get_framing(struct atm_dev *dev, void __user *arg)
+{
+	int framing;
+	unsigned char s;
+
+
+	s = (GET(TPOP_APM) & SUNI_TPOP_APM_S) >> SUNI_TPOP_APM_S_SHIFT;
+	if (s == SUNI_TPOP_S_SONET)
+		framing = SONET_FRAME_SONET;
+	else
+		framing = SONET_FRAME_SDH;
+
+	return put_user(framing, (int __user *) arg) ? -EFAULT : 0;
+}
+
+static int set_framing(struct atm_dev *dev, void __user *arg)
+{
+	int mode;
+
+	if (get_user(mode, (int __user *) arg))
+		return -EFAULT;
+
+	if (mode == SONET_FRAME_SONET)
+		return set_sonet(dev);
+	else if (mode == SONET_FRAME_SDH)
+		return set_sdh(dev);
+
+	return -EINVAL;
+}
+
+
+static int suni_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_SETDIAG:
+			return change_diag(dev,arg,1);
+		case SONET_CLRDIAG:
+			return change_diag(dev,arg,0);
+		case SONET_GETDIAG:
+			return get_diag(dev,arg);
+		case SONET_SETFRAMING:
+			if (!capable(CAP_NET_ADMIN))
+				return -EPERM;
+			return set_framing(dev, arg);
+		case SONET_GETFRAMING:
+			return get_framing(dev, arg);
+		case SONET_GETFRSENSE:
+			return -EINVAL;
+		case ATM_SETLOOP:
+			if (!capable(CAP_NET_ADMIN))
+				return -EPERM;
+			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_RMT_PHY,
+			    (int __user *) arg) ? -EFAULT : 0;
+		default:
+			return -ENOIOCTLCMD;
+	}
+}
+
+
+static void poll_los(struct atm_dev *dev)
+{
+	atm_dev_signal_change(dev,
+		GET(RSOP_SIS) & SUNI_RSOP_SIS_LOSV ?
+		ATM_PHY_SIG_LOST : ATM_PHY_SIG_FOUND);
+}
+
+
+static void suni_int(struct atm_dev *dev)
+{
+	poll_los(dev);
+	printk(KERN_NOTICE "%s(itf %d): signal %s\n",dev->type,dev->number,
+	    dev->signal == ATM_PHY_SIG_LOST ?  "lost" : "detected again");
+}
+
+
+static int suni_start(struct atm_dev *dev)
+{
+	unsigned long flags;
+	int first;
+
+	spin_lock_irqsave(&sunis_lock,flags);
+	first = !sunis;
+	PRIV(dev)->next = sunis;
+	sunis = PRIV(dev);
+	spin_unlock_irqrestore(&sunis_lock,flags);
+	memset(&PRIV(dev)->sonet_stats,0,sizeof(struct k_sonet_stats));
+	PUT(GET(RSOP_CIE) | SUNI_RSOP_CIE_LOSE,RSOP_CIE);
+		/* interrupt on loss of signal */
+	poll_los(dev); /* ... and clear SUNI interrupts */
+	if (dev->signal == ATM_PHY_SIG_LOST)
+		printk(KERN_WARNING "%s(itf %d): no signal\n",dev->type,
+		    dev->number);
+	PRIV(dev)->loop_mode = ATM_LM_NONE;
+	suni_hz(NULL); /* clear SUNI counters */
+	(void) fetch_stats(dev,NULL,1); /* clear kernel counters */
+	if (first) {
+		timer_setup(&poll_timer, suni_hz, 0);
+		poll_timer.expires = jiffies+HZ;
+#if 0
+printk(KERN_DEBUG "[u] p=0x%lx,n=0x%lx\n",(unsigned long) poll_timer.list.prev,
+    (unsigned long) poll_timer.list.next);
+#endif
+		add_timer(&poll_timer);
+	}
+	return 0;
+}
+
+
+static int suni_stop(struct atm_dev *dev)
+{
+	struct suni_priv **walk;
+	unsigned long flags;
+
+	/* let SAR driver worry about stopping interrupts */
+	spin_lock_irqsave(&sunis_lock,flags);
+	for (walk = &sunis; *walk != PRIV(dev);
+	    walk = &PRIV((*walk)->dev)->next);
+	*walk = PRIV((*walk)->dev)->next;
+	if (!sunis) del_timer_sync(&poll_timer);
+	spin_unlock_irqrestore(&sunis_lock,flags);
+	kfree(PRIV(dev));
+
+	return 0;
+}
+
+
+static const struct atmphy_ops suni_ops = {
+	.start		= suni_start,
+	.ioctl		= suni_ioctl,
+	.interrupt	= suni_int,
+	.stop		= suni_stop,
+};
+
+
+int suni_init(struct atm_dev *dev)
+{
+	unsigned char mri;
+
+	if (!(dev->phy_data = kmalloc(sizeof(struct suni_priv),GFP_KERNEL)))
+		return -ENOMEM;
+	PRIV(dev)->dev = dev;
+
+	mri = GET(MRI); /* reset SUNI */
+	PRIV(dev)->type = (mri & SUNI_MRI_TYPE) >> SUNI_MRI_TYPE_SHIFT;
+	PUT(mri | SUNI_MRI_RESET,MRI);
+	PUT(mri,MRI);
+	PUT((GET(MT) & SUNI_MT_DS27_53),MT); /* disable all tests */
+        set_sonet(dev);
+	REG_CHANGE(SUNI_TACP_IUCHP_CLP,0,SUNI_TACP_IUCHP_CLP,
+	    TACP_IUCHP); /* idle cells */
+	PUT(SUNI_IDLE_PATTERN,TACP_IUCPOP);
+	dev->phy = &suni_ops;
+
+	return 0;
+}
+
+EXPORT_SYMBOL(suni_init);
+
+MODULE_LICENSE("GPL");