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/*
* (C) Copyright 2000-2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* 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 <common.h>
#include <mpc8260.h>
#include <asm/processor.h>
/* ------------------------------------------------------------------------- */
/* Bus-to-Core Multiplier */
#define _1x 2
#define _1_5x 3
#define _2x 4
#define _2_5x 5
#define _3x 6
#define _3_5x 7
#define _4x 8
#define _4_5x 9
#define _5x 10
#define _5_5x 11
#define _6x 12
#define _6_5x 13
#define _7x 14
#define _7_5x 15
#define _8x 16
#define _byp -1
#define _off -2
#define _unk -3
typedef struct {
int b2c_mult;
int vco_div;
char *freq_60x;
char *freq_core;
} corecnf_t;
/*
* this table based on "Errata to MPC8260 PowerQUICC II User's Manual",
* Rev. 1, 8/2000, page 10.
*/
corecnf_t corecnf_tab[] = {
{ _1_5x, 4, " 33-100", " 33-100" }, /* 0x00 */
{ _1x, 4, " 50-150", " 50-150" }, /* 0x01 */
{ _1x, 8, " 25-75 ", " 25-75 " }, /* 0x02 */
{ _byp, -1, " ?-? ", " ?-? " }, /* 0x03 */
{ _2x, 2, " 50-150", "100-300" }, /* 0x04 */
{ _2x, 4, " 25-75 ", " 50-150" }, /* 0x05 */
{ _2_5x, 2, " 40-120", "100-240" }, /* 0x06 */
{ _4_5x, 2, " 22-65 ", "100-300" }, /* 0x07 */
{ _3x, 2, " 33-100", "100-300" }, /* 0x08 */
{ _5_5x, 2, " 18-55 ", "100-300" }, /* 0x09 */
{ _4x, 2, " 25-75 ", "100-300" }, /* 0x0A */
{ _5x, 2, " 20-60 ", "100-300" }, /* 0x0B */
{ _1_5x, 8, " 16-50 ", " 16-50 " }, /* 0x0C */
{ _6x, 2, " 16-50 ", "100-300" }, /* 0x0D */
{ _3_5x, 2, " 30-85 ", "100-300" }, /* 0x0E */
{ _off, -1, " ?-? ", " ?-? " }, /* 0x0F */
{ _3x, 4, " 16-50 ", " 50-150" }, /* 0x10 */
{ _2_5x, 4, " 20-60 ", " 50-120" }, /* 0x11 */
{ _6_5x, 2, " 15-46 ", "100-300" }, /* 0x12 */
{ _byp, -1, " ?-? ", " ?-? " }, /* 0x13 */
{ _7x, 2, " 14-43 ", "100-300" }, /* 0x14 */
{ _2x, 4, " 25-75 ", " 50-150" }, /* 0x15 */
{ _7_5x, 2, " 13-40 ", "100-300" }, /* 0x16 */
{ _4_5x, 2, " 22-65 ", "100-300" }, /* 0x17 */
{ _unk, -1, " ?-? ", " ?-? " }, /* 0x18 */
{ _5_5x, 2, " 18-55 ", "100-300" }, /* 0x19 */
{ _4x, 2, " 25-75 ", "100-300" }, /* 0x1A */
{ _5x, 2, " 20-60 ", "100-300" }, /* 0x1B */
{ _8x, 2, " 12-38 ", "100-300" }, /* 0x1C */
{ _6x, 2, " 16-50 ", "100-300" }, /* 0x1D */
{ _3_5x, 2, " 30-85 ", "100-300" }, /* 0x1E */
{ _off, -1, " ?-? ", " ?-? " }, /* 0x1F */
};
/* ------------------------------------------------------------------------- */
/*
*
*/
int get_clocks (void)
{
DECLARE_GLOBAL_DATA_PTR;
volatile immap_t *immap = (immap_t *) CFG_IMMR;
ulong clkin;
ulong sccr, dfbrg;
ulong scmr, corecnf, busdf, cpmdf, plldf, pllmf;
corecnf_t *cp;
#if !defined(CONFIG_8260_CLKIN)
#error clock measuring not implemented yet - define CONFIG_8260_CLKIN
#else
clkin = CONFIG_8260_CLKIN;
#endif
sccr = immap->im_clkrst.car_sccr;
dfbrg = (sccr & SCCR_DFBRG_MSK) >> SCCR_DFBRG_SHIFT;
scmr = immap->im_clkrst.car_scmr;
corecnf = (scmr & SCMR_CORECNF_MSK) >> SCMR_CORECNF_SHIFT;
busdf = (scmr & SCMR_BUSDF_MSK) >> SCMR_BUSDF_SHIFT;
cpmdf = (scmr & SCMR_CPMDF_MSK) >> SCMR_CPMDF_SHIFT;
plldf = (scmr & SCMR_PLLDF) ? 1 : 0;
pllmf = (scmr & SCMR_PLLMF_MSK) >> SCMR_PLLMF_SHIFT;
cp = &corecnf_tab[corecnf];
gd->vco_out = (clkin * 2 * (pllmf + 1)) / (plldf + 1);
#if 0
if (gd->vco_out / (busdf + 1) != clkin) {
/* aaarrrggghhh!!! */
return (1);
}
#endif
gd->cpm_clk = gd->vco_out / 2;
gd->bus_clk = clkin;
gd->scc_clk = gd->vco_out / 4;
gd->brg_clk = gd->vco_out / (1 << (2 * (dfbrg + 1)));
if (cp->b2c_mult > 0) {
gd->cpu_clk = (clkin * cp->b2c_mult) / 2;
} else {
gd->cpu_clk = clkin;
}
return (0);
}
int prt_8260_clks (void)
{
DECLARE_GLOBAL_DATA_PTR;
volatile immap_t *immap = (immap_t *) CFG_IMMR;
ulong sccr, dfbrg;
ulong scmr, corecnf, busdf, cpmdf, plldf, pllmf;
corecnf_t *cp;
sccr = immap->im_clkrst.car_sccr;
dfbrg = (sccr & SCCR_DFBRG_MSK) >> SCCR_DFBRG_SHIFT;
scmr = immap->im_clkrst.car_scmr;
corecnf = (scmr & SCMR_CORECNF_MSK) >> SCMR_CORECNF_SHIFT;
busdf = (scmr & SCMR_BUSDF_MSK) >> SCMR_BUSDF_SHIFT;
cpmdf = (scmr & SCMR_CPMDF_MSK) >> SCMR_CPMDF_SHIFT;
plldf = (scmr & SCMR_PLLDF) ? 1 : 0;
pllmf = (scmr & SCMR_PLLMF_MSK) >> SCMR_PLLMF_SHIFT;
cp = &corecnf_tab[corecnf];
printf ("MPC8260 Clock Configuration\n - Bus-to-Core Mult ");
switch (cp->b2c_mult) {
case _byp:
printf ("BYPASS");
break;
case _off:
printf ("OFF");
break;
case _unk:
printf ("UNKNOWN");
break;
default:
printf ("%d%sx",
cp->b2c_mult / 2,
(cp->b2c_mult % 2) ? ".5" : "");
break;
}
printf (", VCO Div %d, 60x Bus Freq %s, Core Freq %s\n",
cp->vco_div, cp->freq_60x, cp->freq_core);
printf (" - dfbrg %ld, corecnf 0x%02lx, busdf %ld, cpmdf %ld, "
"plldf %ld, pllmf %ld\n", dfbrg, corecnf, busdf, cpmdf, plldf,
pllmf);
printf (" - vco_out %10ld, scc_clk %10ld, brg_clk %10ld\n",
gd->vco_out, gd->scc_clk, gd->brg_clk);
printf (" - cpu_clk %10ld, cpm_clk %10ld, bus_clk %10ld\n\n",
gd->cpu_clk, gd->cpm_clk, gd->bus_clk);
return (0);
}
/* ------------------------------------------------------------------------- */
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