synced to klaus code

1 files changed, 197 insertions, 67 deletions

diff --git a/dmascc/dmascc_cfg.c b/dmascc/dmascc_cfg.c
index 4cece3d..47b4ac2 100644
--- a/dmascc/dmascc_cfg.c
+++ b/dmascc/dmascc_cfg.c
@@ -1,8 +1,8 @@
 /*
- * $Id: dmascc_cfg.c,v 0.7 1997/12/02 11:31:21 oe1kib Exp $
+ * $Id: dmascc_cfg.c,v 1.2 2001/05/10 10:44:45 csmall Exp $
  *
  * Configuration utility for dmascc driver
- * Copyright (C) 1997 Klaus Kudielka
+ * Copyright (C) 1997,2000 Klaus Kudielka
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -26,36 +26,68 @@
 #include <unistd.h>
 #include <sys/socket.h>
 #include <sys/ioctl.h>
-#include <net/if.h>
-#include <linux/dmascc.h>
+#include <linux/if.h>
 #include <asm/param.h>
 
-void usage(char *name)
+/* Ioctls */
+#define SIOCGSCCPARAM SIOCDEVPRIVATE
+#define SIOCSSCCPARAM (SIOCDEVPRIVATE+1)
+
+/* Frequency of timer 0 */
+#define TMR_0_HZ      25600
+
+/* Configurable parameters */
+struct scc_param {
+  int pclk_hz;    /* frequency of BRG input (don't change) */
+  int brg_tc;     /* BRG terminal count; BRG disabled if < 0 */
+  int nrzi;       /* 0 (nrz), 1 (nrzi) */
+  int clocks;     /* see dmascc_cfg documentation */
+  int txdelay;    /* [1/TMR_0_HZ] */
+  int txtimeout;  /* [1/HZ] */
+  int txtail;     /* [1/TMR_0_HZ] */
+  int waittime;   /* [1/TMR_0_HZ] */
+  int slottime;   /* [1/TMR_0_HZ] */
+  int persist;    /* 1 ... 256 */
+  int dma;        /* -1 (disable), 0, 1, 3 */
+  int txpause;    /* [1/TMR_0_HZ] */
+  int rtsoff;     /* [1/TMR_0_HZ] */
+  int dcdon;      /* [1/TMR_0_HZ] */
+  int dcdoff;     /* [1/TMR_0_HZ] */
+  int reserved[35];
+};
+
+void usage(void)
 {
   fprintf(stderr,
-	  "usage:   %s <interface> [ options ... ]\n\n"
-	  "options: --show           show configuration\n"
-	  "         --speed <f>      set baud rate\n"
-	  "         --nrzi 0 | 1     set NRZ or NRZI encoding\n"
-	  "         --clocks <i>     set clock mode\n"
-	  "         --txdelay <f>    set transmit delay in ms\n"
-	  "         --txtime <f>     set maximum transmit time in s\n"
-	  "         --sqdelay <f>    set squelch delay in ms\n"
-	  "         --slottime <f>   set slot time in ms\n"
-	  "         --waittime <f>   set wait time after transmit in ms\n"
-	  "         --persist <i>    set persistence parameter\n"
-	  "         --dma <i>        set DMA channel\n", name);
+	  "usage:   dmascc_cfg <interface> [ options ... ]\n\n"
+	  "options: --show         show updated configuration\n"
+	  "         --frequency f  frequency of baud rate generator in Hz\n"
+	  "         --nrzi n       NRZ (0) or NRZI (1) encoding\n"
+	  "         --clocks n     clock mode (see manual page)\n"
+	  "         --txdelay t    transmit delay in ms\n"
+	  "         --txpause t    inter-packet delay in ms\n"
+	  "         --txtimeout t  stop transmitting packets after t ms\n"
+	  "         --txtail t     transmit tail in ms\n"
+	  "         --rtsoff t     DCD settling time in ms (after RTS off)\n"
+	  "         --dcdon t      DCD settling time in ms (after DCD on)\n"
+	  "         --dcdoff t     DCD settling time in ms (after DCD off)\n"
+	  "         --slottime t   slot time in ms\n"
+	  "         --persist n    persistence parameter (1..256)\n"
+	  "         --waittime t   wait time after transmit in ms\n"
+	  "         --dma n        "
+	  "DMA channel: -1 (no DMA), 0 (S5SCC/DMA only), 1, 3\n"
+	  );
 }
 
 int main(int argc, char *argv[])
 {
-  int sk, show = 0, set = 0, error = 0;
+  int sk, show = 0, set = 0, old = 0, secondary;
   struct ifreq ifr;
   struct scc_param param;
-  char **option, *end;
+  char **option, *end, *error = NULL;
 
   if (argc < 2) {
-    usage(argv[0]);
+    usage();
     return 1;
   }
 
@@ -64,6 +96,14 @@ int main(int argc, char *argv[])
     return 2;
   }
 
+  memset(&param, 0, sizeof(param));
+  param.txpause = -1;
+
+  if strncmp(argv[1], "dmascc", 6) {
+    fprintf(stderr, "invalid interface name.\n");
+    return 5;
+  }
+
   strncpy(ifr.ifr_name, argv[1], IFNAMSIZ);
   ifr.ifr_data = (caddr_t) &param;
   if (ioctl(sk, SIOCGSCCPARAM, &ifr) < 0) {
@@ -72,91 +112,173 @@ int main(int argc, char *argv[])
     return 3;
   }
 
+  if (param.txpause == -1) {
+    param.txpause = 0;
+    old = 1;
+  }
+
+  secondary = argv[1][strlen(argv[1])-1]%2;
+
   option = argv + 2;
   while (!error && *option != NULL) {
     if (!strcmp(*option, "--show")) {
       show = 1;
       option++;
-    } else if (!strcmp(*option, "--speed")) {
+    } else if (!strcmp(*option, "--frequency")) {
       option++;
       if (*option != NULL) {
-	double speed;
+	double f;
 	set = 1;
-	speed = strtod(*option++, &end);
-	if (*end) error = 1; else {
-	  if (speed <= 0.0) param.brg_tc = -1; 
-	  else param.brg_tc = param.pclk_hz / (speed * 2) - 2;
-	  if (param.brg_tc > 0xffff) param.brg_tc = -1;
+	f = strtod(*option++, &end);
+	if (*end) error = "frequency not a number";
+	else {
+	  if (f < 0.0) error = "frequency < 0";
+	  else if (f == 0.0) param.brg_tc = -1;
+	  else {
+	    param.brg_tc = param.pclk_hz / (f * 2) - 2;
+	    if (param.brg_tc > 0xffff) error = "frequency too low";
+	    if (param.brg_tc < 0) error = "frequency too high";
+	  }
 	}
-      } else error = 1;
+      } else error = "--frequency requires parameter";
     } else if (!strcmp(*option, "--nrzi")) {
       option++;
       if (*option != NULL) {
 	set = 1;
 	param.nrzi = strtol(*option++, &end, 0);
-	if (*end) error = 1;
-      } else error = 1;
+	if (*end || param.nrzi < 0 || param.nrzi > 1)
+	  error = "nrzi must be 0 or 1";
+      } else error = "--nrzi requires parameter";
     } else if (!strcmp(*option, "--clocks")) {
       option++;
       if (*option != NULL) {
 	set = 1;
 	param.clocks = strtol(*option++, &end, 0);
-	if (*end) error = 1;
-      } else error = 1;
+	if (*end) error = "clock mode not a number";
+	else if ((param.clocks & ~0x7f)) error = "invalid clock mode";
+      } else error = "--clocks requires parameter";
     } else if (!strcmp(*option, "--txdelay")) {
       option++;
       if (*option != NULL) {
 	set = 1;
 	param.txdelay = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
-	if (*end) error = 1;
-      } else error = 1;
-    } else if (!strcmp(*option, "--txtime")) {
+	if (*end) error = "txdelay not a number";
+	else if (param.txdelay < 0) error = "txdelay < 0";
+	else if (param.txdelay > 0xffff) error = "txdelay too large";
+      } else error = "--txdelay requires parameter";
+    } else if (!strcmp(*option, "--txpause")) {
       option++;
       if (*option != NULL) {
 	set = 1;
-	param.txtime = HZ * strtod(*option++, &end);
-	if (*end) error = 1;
-      } else error = 1;
-    } else if (!strcmp(*option, "--sqdelay")) {
+	param.txpause = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
+	if (*end) error = "txpause not a number";
+	else if (param.txpause < 0) error = "txpause < 0";
+	else if (param.txpause > 0xffff) error = "txpause too large";
+	if (old && param.txpause != 0)
+	  fprintf(stderr, "warning: old driver; txpause not supported.\n");
+      } else error = "--txpause requires parameter";
+    } else if (!strcmp(*option, "--txtimeout")) {
       option++;
       if (*option != NULL) {
 	set = 1;
-	param.sqdelay = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
-	if (*end) error = 1;
-      } else error = 1;
-    } else if (!strcmp(*option, "--slottime")) {
+	param.txtimeout = HZ * strtod(*option++, &end) / 1000.0;
+	if (*end) error = "txtimeout not a number";
+	else if (param.txtimeout < 0) error = "txtimeout < 0";
+      } else error = "--txtimeout requires parameter";
+    } else if (!strcmp(*option, "--txtail")) {
       option++;
       if (*option != NULL) {
 	set = 1;
-	param.slottime = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
-	if (*end) error = 1;
-      } else error = 1;
-    } else if (!strcmp(*option, "--waittime")) {
+	param.txtail = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
+	if (*end) error = "txtail not a number";
+	else if (param.txtail < 0) error = "txtail < 0";
+	else if (param.txtail > 0xffff) error = "txtail too large";
+      } else error = "--txtail requires parameter";
+    } else if (!strcmp(*option, "--rtsoff")) {
       option++;
       if (*option != NULL) {
 	set = 1;
-	param.waittime = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
-	if (*end) error = 1;
-      } else error = 1;
+	param.rtsoff = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
+	if (*end) error = "rtsoff not a number";
+	else if (param.rtsoff < 0) error = "rtsoff < 0";
+	else if (param.rtsoff > 0xffff) error = "rtsoff too large";
+	if (old && param.rtsoff != 0)
+	  fprintf(stderr, "warning: old driver; rtsoff not supported.\n");
+      } else error = "--rtsoff requires parameter";
+    } else if (!strcmp(*option, "--dcdon")) {
+      option++;
+      if (*option != NULL) {
+	set = 1;
+	param.dcdon = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
+	if (*end) error = "dcdon not a number";
+	else if (param.dcdon < 0) error = "dcdon < 0";
+	else if (param.dcdon > 0xffff) error = "dcdon too large";
+	if (old && param.dcdon != 0)
+	  fprintf(stderr, "warning: old driver; dcdon not supported.\n");
+      } else error = "--dcdon requires parameter";
+    } else if (!strcmp(*option, "--dcdoff")) {
+      option++;
+      if (*option != NULL) {
+	set = 1;
+	param.dcdoff = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
+	if (*end) error = "dcdoff not a number";
+	else if (param.dcdoff < 0) error = "dcdoff < 0";
+	else if (param.dcdoff > 0xffff) error = "dcdoff too large";
+	if (old && param.dcdoff != 0)
+	  fprintf(stderr, "warning: old driver; dcdoff not supported.\n");
+      } else error = "--dcdoff requires parameter";
+    } else if (!strcmp(*option, "--slottime")) {
+      option++;
+      if (*option != NULL) {
+	set = 1;
+	param.slottime = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
+	if (*end) error = "slottime not a number";
+	else if (param.slottime < 0) error = "slottime < 0";
+	else if (param.slottime > 0xffff) error = "slottime too large";
+      } else error = "--slottime requires parameter";
     } else if (!strcmp(*option, "--persist")) {
       option++;
       if (*option != NULL) {
 	set = 1;
 	param.persist = strtol(*option++, &end, 0);
-	if (*end) error = 1;
-      } else error = 1;
+	if (*end) error = "persist not a number";
+	else if (param.persist < 1) error = "persist < 1";
+	else if (param.persist > 256) error = "persist > 256";
+      } else error = "--persist requires parameter";
+    } else if (!strcmp(*option, "--waittime")) {
+      option++;
+      if (*option != NULL) {
+	set = 1;
+	param.waittime = TMR_0_HZ * strtod(*option++, &end) / 1000.0;
+	if (*end) error = "waittime not a number";
+	else if (param.waittime < 0) error = "waittime < 0";
+	else if (param.waittime > 0xffff) error = "waittime too large";
+      } else error = "--waittime requires parameter";
     } else if (!strcmp(*option, "--dma")) {
       option++;
       if (*option != NULL) {
+	int dma = param.dma;
 	set = 1;
 	param.dma = strtol(*option++, &end, 0);
-	if (*end) error = 1;
-      } else error = 1;
-    } else error = 1;
+	if (*end) error = "DMA channel not a number";
+	else if (secondary && param.dma != -1)
+	  error = "SCC port B must have DMA disabled";
+	else if (param.dma < -1 || param.dma == 2 || param.dma > 3)
+	  error = "invalid DMA channel";
+	else if (param.pclk_hz != 9830400 && param.dma == 0)
+	  error = "only S5SCC/DMA supports DMA channel 0";
+	else if (old && param.dma == 0)
+	  error = "old driver; DMA channel 0 not supported";
+	else if (old && param.dma == -1 && dma > 0)
+	  error = "old driver; reload module or reboot to disable DMA";
+	else if (old && param.dma == -1 && dma == 0)
+	  param.dma = 0;
+      } else error = "--dma requires parameter";
+    } else error = "invalid option";
   }
 
   if (error) {
-    usage(argv[0]);
+    fprintf(stderr, "usage error: %s.\n", error);
     close(sk);
     return 1;
   }
@@ -170,20 +292,28 @@ int main(int argc, char *argv[])
   }
 
   if (show) {
-    double speed;
-    if (param.brg_tc < 0) speed = 0.0;
-    else speed = ((double) param.pclk_hz) / ( 2 * (param.brg_tc + 2));
-    printf("speed    = %.2f\nnrzi     = %d\nclocks   = 0x%02X\n"
-	   "txdelay  = %.2f ms\ntxtime   = %.2f s\nsqdelay  = %.2f ms\n"
-	   "slottime = %.2f ms\nwaittime = %.2f ms\npersist  = %d\n"
-	   "dma      = %d\n",
-	   speed, param.nrzi, param.clocks,
+    double f;
+    if (param.brg_tc < 0) f = 0.0;
+    else f = ((double) param.pclk_hz) / ( 2 * (param.brg_tc + 2));
+    printf("dmascc_cfg %s \\\n--frequency %.2f --nrzi %d --clocks 0x%02X "
+	   "--txdelay %.2f \\\n--txpause %.2f --txtimeout %.2f "
+	   "--txtail %.2f --rtsoff %.2f \\\n--dcdon %.2f --dcdoff %.2f "
+	   "--slottime %.2f --persist %d \\\n--waittime %.2f --dma %d\n",
+	   argv[1],
+	   f,
+	   param.nrzi,
+	   param.clocks,
 	   param.txdelay * 1000.0 / TMR_0_HZ,
-	   (double) param.txtime / HZ,
-	   param.sqdelay * 1000.0 / TMR_0_HZ,
+	   param.txpause * 1000.0 / TMR_0_HZ,
+	   param.txtimeout * 1000.0 / HZ,
+	   param.txtail * 1000.0 / TMR_0_HZ,
+	   param.rtsoff * 1000.0 / TMR_0_HZ,
+	   param.dcdon * 1000.0 / TMR_0_HZ,
+	   param.dcdoff * 1000.0 / TMR_0_HZ,
 	   param.slottime * 1000.0 / TMR_0_HZ,
+	   param.persist,
 	   param.waittime * 1000.0 / TMR_0_HZ,
-	   param.persist, param.dma);
+	   (old && param.dma == 0) ? -1 : param.dma);
   }
 
   close(sk);