Created separate isa_ids.h file and a utility function to print out ISA

IDs in a human-readable format.

diff --git a/src/drivers/bus/isa_ids.c b/src/drivers/bus/isa_ids.c
new file mode 100644 (file)
index 0000000..f7be112
--- /dev/null
+++ b/src/drivers/bus/isa_ids.c
@@ -0,0 +1,24 @@
+#include "etherboot.h"
+#include "isa_ids.h"
+
+/* 
+ * EISA and ISAPnP IDs are actually mildly human readable, though in a
+ * somewhat brain-damaged way.
+ *
+ */
+char * isa_id_string ( uint16_t vendor, uint16_t product ) {
+       static unsigned char buf[7];
+       int i;
+
+       /* Vendor ID is a compressed ASCII string */
+       vendor = htons ( vendor );
+       for ( i = 2 ; i >= 0 ; i-- ) {
+               buf[i] = ( 'A' - 1 + ( vendor & 0x1f ) );
+               vendor >>= 5;
+       }
+       
+       /* Product ID is a 4-digit hex string */
+       sprintf ( &buf[3], "%hx", htons ( product ) );
+
+       return buf;
+}

diff --git a/src/include/isa.h b/src/include/isa.h
index 23a8f2f..fe5c557 100644 (file)
--- a/src/include/isa.h
+++ b/src/include/isa.h
@@ -1,13 +1,9 @@
 #ifndef        ISA_H
 #define ISA_H
 
-struct dev;
-
-#define ISAPNP_VENDOR(a,b,c)   (((((a)-'A'+1)&0x3f)<<2)|\
-                               ((((b)-'A'+1)&0x18)>>3)|((((b)-'A'+1)&7)<<13)|\
-                               ((((c)-'A'+1)&0x1f)<<8))
+#include "isa_ids.h"
 
-#define        GENERIC_ISAPNP_VENDOR   ISAPNP_VENDOR('P','N','P')
+struct dev;
 
 struct isa_driver
 {

diff --git a/src/include/isa_ids.h b/src/include/isa_ids.h
new file mode 100644 (file)
index 0000000..0eaa3da
--- /dev/null
+++ b/src/include/isa_ids.h
@@ -0,0 +1,44 @@
+#ifndef ISA_IDS_H
+#define ISA_IDS_H
+
+/* 
+ * This file defines IDs as used by ISAPnP and EISA devices.  These
+ * IDs have the format:
+ *
+ * vendor  byte 0 bit  7    must be zero
+ *               bits 6-2  first vendor char in compressed ASCII
+ *               bits 1-0  second vendor char in compressed ASCII (bits 4-3)
+ *        byte 1 bits 7-5  second vendor char in compressed ASCII (bits 2-0)
+ *                bits 4-0  third vendor char in compressed ASCII
+ * product byte 0 bits 7-4  first hex digit of product number
+ *               bits 3-0  second hex digit of product number
+ *        byte 1 bits 7-4  third hex digit of product number
+ *               bits 3-0  hex digit of revision level
+ *
+ */
+
+#include "stdint.h"
+
+/*
+ * Construct a vendor ID from three ASCII characters
+ *
+ */
+#define ISA_VENDOR(a,b,c)      (((((a)-'A'+1)&0x3f)<<2)|\
+                               ((((b)-'A'+1)&0x18)>>3)|((((b)-'A'+1)&7)<<13)|\
+                               ((((c)-'A'+1)&0x1f)<<8))
+#define ISAPNP_VENDOR(a,b,c)   ISA_VENDOR(a,b,c)
+#define EISA_VENDOR(a,b,c)     ISA_VENDOR(a,b,c)
+
+#define        GENERIC_ISAPNP_VENDOR   ISAPNP_VENDOR('P','N','P')
+
+/*
+ * Extract product ID and revision from combined product field
+ *
+ */
+#define ISA_PROD_ID(product)   ( (product) & 0xf0ff )
+#define ISA_PROD_REV(product)  ( ( (product) & 0x0f00 ) >> 8 )
+
+/* Functions in isa_ids.c */
+extern char * isa_id_string ( uint16_t vendor, uint16_t product );
+
+#endif /* ISA_IDS_H */

diff --git a/src/include/mca.h b/src/include/mca.h
index f6d37ba..e69b656 100644 (file)
--- a/src/include/mca.h
+++ b/src/include/mca.h
@@ -19,8 +19,8 @@
 #define MCA_POS_REG(n)                 (0x100+(n))
 
 /* Is there a standard that would define this? */
-#include "isa.h"
-#define GENERIC_MCA_VENDOR ISAPNP_VENDOR ( 'M', 'C', 'A' )
+#include "isa_ids.h"
+#define GENERIC_MCA_VENDOR ISA_VENDOR ( 'M', 'C', 'A' )
 
 /*
  * A physical MCA device