Add monitor functions for indirect access to PPC440 DCR's
Patch by Leonid Baryudin, 12 Oct 2006
diff --git a/common/cmd_dcr.c b/common/cmd_dcr.c
index 5842471..5fe2ede 100644
--- 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_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 @@
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 @@
"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 */