atm: [suni] add support for setting loopback and framing modes

Signed-off-by: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 132 insertions, 20 deletions

diff --git a/drivers/atm/suni.c b/drivers/atm/suni.c
index 6097f6877a44..6dd3f5919968 100644
--- a/drivers/atm/suni.c
+++ b/drivers/atm/suni.c
@@ -1,8 +1,14 @@
-/* drivers/atm/suni.c - PMC PM5346 SUNI (PHY) driver */
+/*
+ * 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>
@@ -146,25 +152,105 @@ static int get_diag(struct atm_dev *dev,void __user *arg)
 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 = GET(MCT) & ~(SUNI_MCT_DLE | 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 |= SUNI_MCT_DLE;
+                        control |= dle;
                         break;
                 case ATM_LM_RMT_PHY:
-                        control |= SUNI_MCT_LLE;
+                        control |= lle;
                         break;
                 default:
                         return -EINVAL;
         }
-        PUT(control,MCT);
+         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)
 {
@@ -179,14 +265,16 @@ static int suni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
                 case SONET_GETDIAG:
                         return get_diag(dev,arg);
                 case SONET_SETFRAMING:
-                        if ((int)(unsigned long)arg != SONET_FRAME_SONET) return -EINVAL;
-                        return 0;
+                        if (!capable(CAP_NET_ADMIN))
+                                return -EPERM;
+                        return set_framing(dev, arg);
                 case SONET_GETFRAMING:
-                        return put_user(SONET_FRAME_SONET,(int __user *)arg) ?
-                            -EFAULT : 0;
+                        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) ?
@@ -220,10 +308,6 @@ static int suni_start(struct atm_dev *dev)
         unsigned long flags;
         int first;
 
-        if (!(dev->phy_data = kmalloc(sizeof(struct suni_priv),GFP_KERNEL)))
-                return -ENOMEM;
-
-        PRIV(dev)->dev = dev;
         spin_lock_irqsave(&sunis_lock,flags);
         first = !sunis;
         PRIV(dev)->next = sunis;
@@ -284,16 +368,21 @@ 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 */
-        REG_CHANGE(SUNI_TPOP_APM_S,SUNI_TPOP_APM_S_SHIFT,SUNI_TPOP_S_SONET,
-            TPOP_APM); /* use SONET */
+        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;
 }
 
diff --git a/drivers/atm/suni.h b/drivers/atm/suni.h
index efa79bfae75b..7e3e656b3993 100644
--- a/drivers/atm/suni.h
+++ b/drivers/atm/suni.h
@@ -1,7 +1,8 @@
-/* drivers/atm/suni.h - PMC PM5346 SUNI (PHY) declarations */
+/*
+ * drivers/atm/suni.h - S/UNI PHY driver
+ */
  
 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
- 
 
 #ifndef DRIVER_ATM_SUNI_H
 #define DRIVER_ATM_SUNI_H
@@ -39,7 +40,8 @@
 #define SUNI_RLOP_LFM           0x1F    /* RLOP Line FEBE MSB */
 #define SUNI_TLOP_CTRL          0x20    /* TLOP Control */
 #define SUNI_TLOP_DIAG          0x21    /* TLOP Diagnostic */
-                             /* 0x22-0x2F reserved */
+                             /* 0x22-0x27 reserved */
+#define SUNI_SSTB_CTRL          0x28
 #define SUNI_RPOP_SC            0x30    /* RPOP Status/Control */
 #define SUNI_RPOP_IS            0x31    /* RPOP Interrupt Status */
                              /* 0x32 reserved */
@@ -52,6 +54,7 @@
 #define SUNI_RPOP_PFM           0x3B    /* RPOP Path FEBE MSB */
                              /* 0x3C reserved */
 #define SUNI_RPOP_PBC           0x3D    /* RPOP Path BIP-8 Configuration */
+#define SUNI_RPOP_RC            0x3D    /* RPOP Ring Control (PM5355) */
                              /* 0x3E-0x3F reserved */
 #define SUNI_TPOP_CD            0x40    /* TPOP Control/Diagnostic */
 #define SUNI_TPOP_PC            0x41    /* TPOP Pointer Control */
@@ -82,7 +85,8 @@
 #define SUNI_TACP_TCC           0x65    /* TACP Transmit Cell Counter */
 #define SUNI_TACP_TCCM          0x66    /* TACP Transmit Cell Counter MSB */
 #define SUNI_TACP_CFG           0x67    /* TACP Configuration */
-                             /* 0x68-0x7F reserved */
+#define SUNI_SPTB_CTRL          0x68    /* SPTB Control */
+                             /* 0x69-0x7F reserved */
 #define SUNI_MT                 0x80    /* Master Test */
                              /* 0x81-0xFF reserved */
 
@@ -94,9 +98,18 @@
 #define SUNI_MRI_ID_SHIFT       0
 #define SUNI_MRI_TYPE           0x70    /* R, SUNI type (lite is 011) */
 #define SUNI_MRI_TYPE_SHIFT     4
+#define SUNI_MRI_TYPE_PM5346    0x3     /* S/UNI 155 LITE */
+#define SUNI_MRI_TYPE_PM5347    0x4     /* S/UNI 155 PLUS */
+#define SUNI_MRI_TYPE_PM5350    0x7     /* S/UNI 155 ULTRA */
+#define SUNI_MRI_TYPE_PM5355    0x1     /* S/UNI 622 */
 #define SUNI_MRI_RESET          0x80    /* RW, reset & power down chip
                                            0: normal operation
                                            1: reset & low power */
+
+/* MCM is reg 0x4 */
+#define SUNI_MCM_LLE            0x20    /* line loopback (PM5355) */
+#define SUNI_MCM_DLE            0x10    /* diagnostic loopback (PM5355) */
+
 /* MCT is reg 5 */
 #define SUNI_MCT_LOOPT          0x01    /* RW, timing source, 0: from
                                            TRCLK+/- */
@@ -144,6 +157,12 @@
 /* TLOP_DIAG is reg 0x21 */
 #define SUNI_TLOP_DIAG_DBIP     0x01    /* insert line BIP err (continuously) */
 
+/* SSTB_CTRL is reg 0x28 */
+#define SUNI_SSTB_CTRL_LEN16    0x01    /* path trace message length bit */
+
+/* RPOP_RC is reg 0x3D (PM5355) */
+#define SUNI_RPOP_RC_ENSS       0x40    /* enable size bit */
+
 /* TPOP_DIAG is reg 0x40 */
 #define SUNI_TPOP_DIAG_PAIS     0x01    /* insert STS path alarm ind (cont) */
 #define SUNI_TPOP_DIAG_DB3      0x02    /* insert path BIP err (continuously) */
@@ -191,6 +210,9 @@
                                            pattern */
 #define SUNI_TACP_IUCHP_GFC_SHIFT 4
 
+/* SPTB_CTRL is reg 0x68 */
+#define SUNI_SPTB_CTRL_LEN16    0x01    /* path trace message length */
+
 /* MT is reg 0x80 */
 #define SUNI_MT_HIZIO           0x01    /* RW, all but data bus & MP interface
                                            tri-state */
@@ -208,6 +230,7 @@
 struct suni_priv {
         struct k_sonet_stats sonet_stats;       /* link diagnostics */
         int loop_mode;                          /* loopback mode */
+        int type;                               /* phy type */
         struct atm_dev *dev;                    /* device back-pointer */
         struct suni_priv *next;                 /* next SUNI */
 };