Add monitor functions for indirect access to PPC440 DCR's

Patch by Leonid Baryudin, 12 Oct 2006

diff --git a/CHANGELOG b/CHANGELOG
index 2a40ab3561aa6095fa90c9f89b58d3383d40c37d..4ac98b7a6a2acf08468ca2119908c4b4edbc8979 100644 (file)
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,9 @@
 Changes since U-Boot 1.1.4:
 ======================================================================
 
+* Add monitor functions for indirect access to PPC440 DCR's
+  Patch by Leonid Baryudin, 12 Oct 2006
+
 * PPC405EP: Add support for board configuration of CPC0_PCI register
   This is needed to be able to configure PerWE*/PCI_INT* pin as PerWE*
   Patch by Tolunay Orkun, 07 Apr 2006

diff --git a/common/cmd_dcr.c b/common/cmd_dcr.c
index 5842471df159b15ed929b5dd916e373078315941..5fe2ede52fb1dbfc1bafab7063d3ee0453a4887a 100644 (file)
--- a/common/cmd_dcr.c
+++ b/common/cmd_dcr.c
@@ -31,6 +31,9 @@
 
 #if defined(CONFIG_4xx) && (CONFIG_COMMANDS & CFG_CMD_SETGETDCR)
 
+unsigned long get_dcr (unsigned short);
+unsigned long set_dcr (unsigned short, unsigned long);
+
 /* =======================================================================
  * Interpreter command to retrieve an AMCC PPC 4xx Device Control Register
  * =======================================================================
@@ -64,8 +67,6 @@ int do_getdcr ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[] )
 */
 int do_setdcr (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 {
-       unsigned long get_dcr (unsigned short);
-       unsigned long set_dcr (unsigned short, unsigned long);
        unsigned short dcrn;    /* Device Control Register Num */
        unsigned long value;
 
@@ -106,6 +107,120 @@ int do_setdcr (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
        return 0;
 }
 
+/* =======================================================================
+ * Interpreter command to retrieve an register value through AMCC PPC 4xx
+ * Device Control Register inderect addressing.
+ * =======================================================================
+ */
+int do_getidcr (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+       unsigned short adr_dcrn;        /* Device Control Register Num for Address */
+       unsigned short dat_dcrn;        /* Device Control Register Num for Data */
+       unsigned short offset;          /* Register's offset */
+       unsigned long value;            /* Register's value */
+       char *ptr = NULL;
+       char buf[80];
+
+       /* Validate arguments */
+       if (argc < 3) {
+               printf ("Usage:\n%s\n", cmdtp->usage);
+               return 1;
+       }
+
+       /* Find out whether ther is '.' (dot) symbol in the first parameter. */
+       strncpy (buf, argv[1], sizeof(buf)-1);
+       buf[sizeof(buf)-1] = 0; /* will guarantee zero-end string */
+       ptr = strchr (buf, '.');
+
+       if (ptr != NULL) {
+               /* First parameter has format adr_dcrn.dat_dcrn */
+               *ptr++ = 0; /* erase '.', create zero-end string */
+               adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
+               dat_dcrn = (unsigned short) simple_strtoul (ptr, NULL, 16);
+       } else {
+               /*
+                * First parameter has format adr_dcrn; dat_dcrn will be
+                * calculated as adr_dcrn+1.
+                */
+               adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
+               dat_dcrn = adr_dcrn+1;
+       }
+
+       /* Register's offset */
+       offset = (unsigned short) simple_strtoul (argv[2], NULL, 16);
+
+       /* Disable interrupts */
+       disable_interrupts ();
+       /* Set offset */
+       set_dcr (adr_dcrn, offset);
+       /* get data */
+       value = get_dcr (dat_dcrn);
+       /* Enable interrupts */
+       enable_interrupts ();
+
+       printf ("%04x.%04x-%04x Read  %08lx\n", adr_dcrn, dat_dcrn, offset, value);
+
+       return 0;
+}
+
+/* =======================================================================
+ * Interpreter command to update an register value through AMCC PPC 4xx
+ * Device Control Register inderect addressing.
+ * =======================================================================
+ */
+int do_setidcr (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+       unsigned short adr_dcrn;        /* Device Control Register Num for Address */
+       unsigned short dat_dcrn;        /* Device Control Register Num for Data */
+       unsigned short offset;          /* Register's offset */
+       unsigned long value;            /* Register's value */
+       char *ptr = NULL;
+       char buf[80];
+
+       /* Validate arguments */
+       if (argc < 4) {
+               printf ("Usage:\n%s\n", cmdtp->usage);
+               return 1;
+        }
+
+       /* Find out whether ther is '.' (dot) symbol in the first parameter. */
+       strncpy (buf, argv[1], sizeof(buf)-1);
+       buf[sizeof(buf)-1] = 0; /* will guarantee zero-end string */
+       ptr = strchr (buf, '.');
+
+       if (ptr != NULL) {
+               /* First parameter has format adr_dcrn.dat_dcrn */
+               *ptr++ = 0;     /* erase '.', create zero-end string */
+               adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
+               dat_dcrn = (unsigned short) simple_strtoul (ptr, NULL, 16);
+       } else {
+               /*
+                * First parameter has format adr_dcrn; dat_dcrn will be
+                * calculated as adr_dcrn+1.
+                */
+               adr_dcrn = (unsigned short) simple_strtoul (buf, NULL, 16);
+               dat_dcrn = adr_dcrn+1;
+        }
+
+       /* Register's offset */
+       offset = (unsigned short) simple_strtoul (argv[2], NULL, 16);
+       /* New value */
+       value  = (unsigned  long) simple_strtoul (argv[3], NULL, 16);
+
+       /* Disable interrupts */
+       disable_interrupts ();
+       /* Set offset */
+       set_dcr (adr_dcrn, offset);
+       /* set data */
+       set_dcr (dat_dcrn, value);
+       /* Enable interrupts */
+       enable_interrupts ();
+
+       printf ("%04x.%04x-%04x Write %08lx\n", adr_dcrn, dat_dcrn, offset, value);
+
+       return 0;
+}
+
 /***************************************************/
 
 U_BOOT_CMD(
@@ -119,4 +234,16 @@ U_BOOT_CMD(
        "dcrn - set a DCR's value.\n"
 );
 
+U_BOOT_CMD(
+       getidcr,        3,      1,      do_getidcr,
+       "getidcr - Get a register value via indirect DCR addressing\n",
+       "adr_dcrn[.dat_dcrn] offset - write offset to adr_dcrn, read value from dat_dcrn.\n"
+);
+
+U_BOOT_CMD(
+       setidcr,        4,      1,      do_setidcr,
+       "setidcr - Set a register value via indirect DCR addressing\n",
+       "adr_dcrn[.dat_dcrn] offset value - write offset to adr_dcrn, write value to dat_dcrn.\n"
+);
+
 #endif /* CONFIG_4xx & CFG_CMD_SETGETDCR */