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Diffstat (limited to 'tools/mpc86x_clk.c')
| -rw-r--r-- | tools/mpc86x_clk.c | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/tools/mpc86x_clk.c b/tools/mpc86x_clk.c deleted file mode 100644 index 8dfbd4e3d0..0000000000 --- a/tools/mpc86x_clk.c +++ /dev/null @@ -1,218 +0,0 @@ -/* - * (C) Copyright 2003 Intracom S.A. - * Pantelis Antoniou <panto@intracom.gr> - * - * This little program makes an exhaustive search for the - * correct terms of pdf, mfi, mfn, mfd, s, dbrmo, in PLPRCR. - * The goal is to produce a gclk2 from a xin input, while respecting - * all the restrictions on their combination. - * - * Generaly you select the first row of the produced table. - * - * 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 - */ - - -#include <stdio.h> -#include <stdlib.h> - -#define DPREF_MIN 10000000 -#define DPREF_MAX 32000000 - -#define DPGDCK_MAX 320000000 -#define DPGDCK_MIN 160000000 - -#define S_MIN 0 -#define S_MAX 2 - -#define MFI_MIN 5 -#define MFI_MAX 15 - -#define MFN_MIN 0 -#define MFN_MAX 15 - -#define MFD_MIN 0 -#define MFD_MAX 31 - -#define MF_MIN 5 -#define MF_MAX 15 - -#define PDF_MIN 0 -#define PDF_MAX 15 - -#define GCLK2_MAX 150000000 - -static int calculate (int xin, int target_clock, - int ppm, int pdf, int mfi, int mfn, int mfd, int s, - int *dprefp, int *dpgdckp, int *jdbckp, - int *gclk2p, int *dbrmop) -{ - unsigned int dpref, dpgdck, jdbck, gclk2, t1, t2, dbrmo; - - /* valid MFI? */ - if (mfi < MFI_MIN) - return -1; - - /* valid num, denum? */ - if (mfn > 0 && mfn >= mfd) - return -1; - - dpref = xin / (pdf + 1); - - /* valid dpef? */ - if (dpref < DPREF_MIN || dpref > DPREF_MAX) - return -1; - - if (mfn == 0) { - dpgdck = (2 * mfi * xin) / (pdf + 1) ; - dbrmo = 0; - } else { - /* 5 <= mfi + (mfn / mfd + 1) <= 15 */ - t1 = mfd + 1; - t2 = mfi * t1 + mfn; - if ( MF_MIN * t1 > t2 || MF_MAX * t1 < t2) - return -1; - - dpgdck = (unsigned int)(2 * (mfi * mfd + mfi + mfn) * - (unsigned int)xin) / - ((mfd + 1) * (pdf + 1)); - - dbrmo = 10 * mfn < (mfd + 1); - } - - /* valid dpgclk? */ - if (dpgdck < DPGDCK_MIN || dpgdck > DPGDCK_MAX) - return -1; - - jdbck = dpgdck >> s; - gclk2 = jdbck / 2; - - /* valid gclk2 */ - if (gclk2 > GCLK2_MAX) - return -1; - - t1 = abs(gclk2 - target_clock); - - /* XXX max 1MHz dev. in clock */ - if (t1 > 1000000) - return -1; - - /* dev within range (XXX gclk2 scaled to avoid overflow) */ - if (t1 * 1000 > (unsigned int)ppm * (gclk2 / 1000)) - return -1; - - *dprefp = dpref; - *dpgdckp = dpgdck; - *jdbckp = jdbck; - *gclk2p = gclk2; - *dbrmop = dbrmo; - - return gclk2; -} - -int conf_clock(int xin, int target_clock, int ppm) -{ - int pdf, s, mfn, mfd, mfi; - int dpref, dpgdck, jdbck, gclk2, xout, dbrmo; - int found = 0; - - /* integer multipliers */ - for (pdf = PDF_MIN; pdf <= PDF_MAX; pdf++) { - for (mfi = MFI_MIN; mfi <= MFI_MAX; mfi++) { - for (s = 0; s <= S_MAX; s++) { - xout = calculate(xin, target_clock, - ppm, pdf, mfi, 0, 0, s, - &dpref, &dpgdck, &jdbck, - &gclk2, &dbrmo); - if (xout < 0) - continue; - - if (found == 0) { - printf("pdf mfi mfn mfd s dbrmo dpref dpgdck jdbck gclk2 exact?\n"); - printf("--- --- --- --- - ----- ----- ------ ----- ----- ------\n"); - } - - printf("%3d %3d --- --- %1d %5d %9d %9d %9d %9d%s\n", - pdf, mfi, s, dbrmo, - dpref, dpgdck, jdbck, gclk2, - gclk2 == target_clock ? " YES" : ""); - - found++; - } - } - } - - /* fractional multipliers */ - for (pdf = PDF_MIN; pdf <= PDF_MAX; pdf++) { - for (mfi = MFI_MIN; mfi <= MFI_MAX; mfi++) { - for (mfn = 1; mfn <= MFN_MAX; mfn++) { - for (mfd = 1; mfd <= MFD_MAX; mfd++) { - for (s = 0; s <= S_MAX; s++) { - xout = calculate(xin, target_clock, - ppm, pdf, mfi, mfn, mfd, s, - &dpref, &dpgdck, &jdbck, - &gclk2, &dbrmo); - if (xout < 0) - continue; - - if (found == 0) { - printf("pdf mfi mfn mfd s dbrmo dpref dpgdck jdbck gclk2 exact?\n"); - printf("--- --- --- --- - ----- ----- ------ ----- ----- ------\n"); - } - - printf("%3d %3d %3d %3d %1d %5d %9d %9d %9d %9d%s\n", - pdf, mfi, mfn, mfd, s, - dbrmo, dpref, dpgdck, jdbck, gclk2, - gclk2 == target_clock ? " YES" : ""); - - found++; - } - } - } - - } - } - - return found; -} - -int main(int argc, char *argv[]) -{ - int xin, want_gclk2, found, ppm = 100; - - if (argc < 3) { - fprintf(stderr, "usage: mpc86x_clk <xin> <want_gclk2> [ppm]\n"); - fprintf(stderr, " default ppm is 100\n"); - return 10; - } - - xin = atoi(argv[1]); - want_gclk2 = atoi(argv[2]); - if (argc >= 4) - ppm = atoi(argv[3]); - - found = conf_clock(xin, want_gclk2, ppm); - if (found <= 0) { - fprintf(stderr, "cannot produce gclk2 %d from xin %d\n", - want_gclk2, xin); - return EXIT_FAILURE; - } - - return EXIT_SUCCESS; -} |