/* * (C) Copyright 2001 * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com. * * See file CREDITS for list of people who contributed to this * project. * * 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 the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ /* * AMCC 4XX DCR Functions */ #include <common.h> #include <config.h> #include <command.h> 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 * ======================================================================= */ int do_getdcr ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[] ) { unsigned short dcrn; /* Device Control Register Num */ unsigned long value; /* DCR's value */ unsigned long get_dcr (unsigned short); /* Validate arguments */ if (argc < 2) return cmd_usage(cmdtp); /* Get a DCR */ dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16); value = get_dcr (dcrn); printf ("%04x: %08lx\n", dcrn, value); return 0; } /* ====================================================================== * Interpreter command to set an AMCC PPC 4xx Device Control Register * ====================================================================== */ int do_setdcr (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) { unsigned short dcrn; /* Device Control Register Num */ unsigned long value; /* DCR's value */ int nbytes; extern char console_buffer[]; /* Validate arguments */ if (argc < 2) return cmd_usage(cmdtp); /* Set a DCR */ dcrn = (unsigned short) simple_strtoul (argv[1], NULL, 16); do { value = get_dcr (dcrn); printf ("%04x: %08lx", dcrn, value); nbytes = readline (" ? "); if (nbytes == 0) { /* * <CR> pressed as only input, don't modify current * location and exit command. */ nbytes = 1; return 0; } else { unsigned long i; char *endp; i = simple_strtoul (console_buffer, &endp, 16); nbytes = endp - console_buffer; if (nbytes) set_dcr (dcrn, i); } } while (nbytes); 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 * const 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) return cmd_usage(cmdtp); /* 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 * const 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) return cmd_usage(cmdtp); /* 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( getdcr, 2, 1, do_getdcr, "Get an AMCC PPC 4xx DCR's value", "dcrn - return a DCR's value." ); U_BOOT_CMD( setdcr, 2, 1, do_setdcr, "Set an AMCC PPC 4xx DCR's value", "dcrn - set a DCR's value." ); U_BOOT_CMD( getidcr, 3, 1, do_getidcr, "Get a register value via indirect DCR addressing", "adr_dcrn[.dat_dcrn] offset - write offset to adr_dcrn, read value from dat_dcrn." ); U_BOOT_CMD( setidcr, 4, 1, do_setidcr, "Set a register value via indirect DCR addressing", "adr_dcrn[.dat_dcrn] offset value - write offset to adr_dcrn, write value to dat_dcrn." );