linux-vax-kern-commit

[Dave A. <ai...@us...>]

Update of /cvsroot/linux-vax/kernel-2.4/drivers/char
In directory usw-pr-cvs1:/tmp/cvs-serv13105

Modified Files:
	dz.c dz.h 
Log Message:
DA: changes to dz driver for VS3100 (won't work elsewhere).. I've never seen a chip with separate RX/TX interrupts before .. it seems to work for me ...
for vs4000 you might need to change the vsbus int numbers until I write the vsbus autodetect IRQ code..


Index: dz.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/drivers/char/dz.c,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -r1.4 -r1.5
--- dz.c	2001/02/26 02:28:27	1.4
+++ dz.c	2001/06/09 14:07:38	1.5
@@ -39,9 +39,11 @@
 #include <linux/param.h>
 #include <linux/tqueue.h>
 #include <linux/interrupt.h>
-
+#include <linux/delay.h>
 #ifdef CONFIG_VAX
-#define SERIAL 0 /* FIXME: this is wrong */
+#define SERIAL_RX 0xB0 /* FIXME: this is wrong */
+#define SERIAL_TX 0xB1 /* FIXME: this is wrong */
+#define SERIAL SERIAL_RX
 #else
 #include <asm-mips/wbflush.h>
 /* for definition of SERIAL */
@@ -328,8 +330,6 @@
 {
   unsigned char tmp;
 
-
-
   if (info->x_char) {           /* XON/XOFF chars */
     dz_out (info, DZ_TDR, info->x_char);
     info->icount.tx++;
@@ -385,7 +385,9 @@
  * It deals with the multiple ports.
  * ------------------------------------------------------------
  */
-static void dz_interrupt (int irq, void *dev, struct pt_regs *regs)
+/* VAX has separate RX/TX interrupts */
+#ifdef CONFIG_VAX 
+static void dz_interrupt_rx (int irq, void *dev, struct pt_regs *regs)
 {
   struct dz_serial *info;
   unsigned short status;
@@ -396,10 +398,40 @@
   if (status & DZ_RDONE) 
       receive_chars (info);          /* the receive function */
 
+  vsbus_clear_int(7);
+
+}
+
+static void dz_interrupt_tx (int irq, void *dev, struct pt_regs *regs)
+{
+  struct dz_serial *info;
+  unsigned short status;
+
+  status = dz_in ((struct dz_serial *)dev, DZ_CSR); /* get the reason why we just got an irq */
+  info = lines[LINE(status)];     /* re-arrange info the proper port */
+
   if (status & DZ_TRDY) 
     transmit_chars (info);
+
+  vsbus_clear_int(6);
+
 }
+#else
+static void dz_interrupt (int irq, void *dev, struct pt_regs *regs)
+{
+  struct dz_serial *info;
+  unsigned short status;
 
+  status = dz_in ((struct dz_serial *)dev, DZ_CSR); /* get the reason why we just got an irq */
+  info = lines[LINE(status)];     /* re-arrange info the proper port */
+
+  if (status & DZ_RDONE) 
+      receive_chars (info);          /* the receive function */
+
+  if (status & DZ_TRDY) 
+    transmit_chars (info);
+}
+#endif
 /*
  * -------------------------------------------------------------------
  * Here ends the DZ interrupt routines.
@@ -493,6 +525,10 @@
   tmp |= (DZ_RIE | DZ_TIE | DZ_MSE);
   dz_out (info, DZ_CSR, tmp);
 
+#ifdef CONFIG_VAX
+  vsbus_enable_int(6);
+  vsbus_enable_int(7);
+#endif
   info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 
   /* set up the speed */
@@ -674,7 +710,6 @@
 
 
   if (from_user) {
-
     down (&tmp_buf_sem);
     while (1) {
       c = MIN(count, MIN(DZ_XMIT_SIZE - info->xmit_cnt - 1, DZ_XMIT_SIZE - info->xmit_head));
@@ -1265,7 +1300,7 @@
 
   if ((line == DZ_KEYBOARD) || (line == DZ_MOUSE))
     return -ENODEV;
-
+  printk("dz opening line %d\n",line);
   info = lines[line];
   info->count++;
 
@@ -1279,8 +1314,6 @@
   if (retval)
     return retval;
 
-
-
   retval = block_til_ready (tty, filp, info);
   if (retval)
     return retval;
@@ -1296,6 +1329,7 @@
 
   info->session = current->session;
   info->pgrp = current->pgrp;
+
   return 0;
 }
 
@@ -1309,7 +1343,7 @@
 {
   int i, flags;
   struct dz_serial *info;
-
+  int irq;
   /* Setup base handler, and timer table. */
   init_bh (SERIAL_BH, do_serial_bh);
 
@@ -1370,14 +1404,14 @@
     info->magic = SERIAL_MAGIC;
 
 #ifdef CONFIG_VAX
-      info->port = (unsigned long) 0x200A0000;
+      info->port = (unsigned long) dz11_addr;
 #else
       if ((mips_machtype == MACH_DS23100) || (mips_machtype == MACH_DS5100)) 
       info->port = (unsigned long) KN01_DZ11_BASE;
       else 
       info->port = (unsigned long) KN02_DZ11_BASE;
 #endif
-       
+
     info->line = i;
     info->tty = 0;
     info->close_delay = 50;
@@ -1399,10 +1433,12 @@
        set up in setup.c to handle this. */
     if (! info->port)
       return 0;
-
-    printk("ttyS%02d at 0x%04x (irq = %d)\n", info->line, info->port, SERIAL);
+#ifdef CONFIG_VAX
+    printk("ttyS%d at 0x%04x (irq = %d, %d)\n", info->line, info->port, SERIAL_RX, SERIAL_TX);
+#else
+    printk("ttyS%d at 0x%04x (irq = %d)\n", info->line, info->port, SERIAL);
+#endif
   }
-
   /* reset the chip */
 #ifndef CONFIG_SERIAL_CONSOLE
   dz_out(info, DZ_CSR, DZ_CLR);
@@ -1416,21 +1452,48 @@
   /* order matters here... the trick is that flags
      is updated... in request_irq - to immediatedly obliterate
      it is unwise. */
-  restore_flags(flags);
- 
+  restore_flags(flags); 
+#if 0
+  {
+    short i;
 
-  if (request_irq (SERIAL, dz_interrupt, SA_INTERRUPT, "DZ", lines[0]))
+  
+    autoirq_setup(0);
+    vsbus_enable_int(6);
+    i = dz_in(info, DZ_TCR);
+    dz_out(info, DZ_CSR, DZ_MSE|DZ_TIE);
+    dz_out(info, DZ_TCR, 0);
+    udelay(100);
+    dz_out(info, DZ_TCR, 1);
+    udelay(10000);
+    dz_out(info, DZ_TCR, 1);
+    vsbus_clear_int(6);
+    irq=autoirq_report(100);
+  }
+  printk("going for IRQ %d\n", irq);
+#endif
+#ifdef CONFIG_VAX
+  if (request_irq (SERIAL_TX, dz_interrupt_tx, SA_INTERRUPT, "DZ", lines[0]))
     panic ("Unable to register DZ interrupt\n");
- 
+  if (request_irq (SERIAL_RX, dz_interrupt_rx, SA_INTERRUPT, "DZ", lines[0]))
+    panic ("Unable to register DZ interrupt\n");
+#else
+  if (request_irq (SERIAL, dz_interrupt_rx, SA_INTERRUPT, "DZ", lines[0]))
+    panic ("Unable to register DZ interrupt\n");
+#endif
+
   return 0;
 }
 
+__initcall(dz_init);
+
 #ifdef CONFIG_SERIAL_CONSOLE
 static void dz_console_put_char (unsigned char ch)
 {
   unsigned long flags;
   int  loops = 2500;
   unsigned short tmp = ch;
+  unsigned short tcr, mask;
   /* this code sends stuff out to serial device - spinning its
       wheels and waiting. */
 
@@ -1440,7 +1503,9 @@
   save_flags(flags);
   cli();
   
-
+  mask = 1 << dz_console->line;
+  tcr = dz_in (dz_console, DZ_TCR);       /* read the TX flag */
+  dz_out(dz_console, DZ_TCR, mask);
   /* spin our wheels */
   while (((dz_in(dz_console,DZ_CSR) & DZ_TRDY) != DZ_TRDY) &&  loops--)
     ;
@@ -1448,6 +1513,7 @@
   /* Actually transmit the character. */
   dz_out (dz_console, DZ_TDR, tmp);
 
+  dz_out(dz_console, DZ_TCR, tcr);
   restore_flags(flags); 
 }
 /* 

Index: dz.h
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/drivers/char/dz.h,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -r1.2 -r1.3
--- dz.h	2001/01/26 00:27:00	1.2
+++ dz.h	2001/06/09 14:07:38	1.3
@@ -116,7 +116,11 @@
 #define DZ_TDR       0x18            /* Transmit Data Register */
 #endif
 
+#ifdef CONFIG_VAX
 #define DZ_NB_PORT 4
+#else
+#define DZ_NB_PORT 4
+#endif
 
 #define DZ_XMIT_SIZE   4096                 /* buffer size */
 #define WAKEUP_CHARS   DZ_XMIT_SIZE/4
@@ -213,7 +217,12 @@
 
 static void dz_stop (struct tty_struct *);
 static void dz_start (struct tty_struct *);
+#ifdef CONFIG_VAX
+static void dz_interrupt_rx (int, void *, struct pt_regs *);
+static void dz_interrupt_tx (int, void *, struct pt_regs *);
+#else
 static void dz_interrupt (int, void *, struct pt_regs *);
+#endif
 static void do_serial_bh (void);
 static void do_softint (void *);
 static void do_serial_hangup (void *);