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git.ipfire.org Git - people/ms/u-boot.git/blob - cpu/mpc8260/speed.c
2 * (C) Copyright 2000-2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #include <asm/processor.h>
28 /* ------------------------------------------------------------------------- */
30 /* Bus-to-Core Multiplier */
58 * this table based on "Errata to MPC8260 PowerQUICC II User's Manual",
59 * Rev. 1, 8/2000, page 10.
61 corecnf_t corecnf_tab
[] = {
62 { _1_5x
, 4, " 33-100", " 33-100" }, /* 0x00 */
63 { _1x
, 4, " 50-150", " 50-150" }, /* 0x01 */
64 { _1x
, 8, " 25-75 ", " 25-75 " }, /* 0x02 */
65 { _byp
, -1, " ?-? ", " ?-? " }, /* 0x03 */
66 { _2x
, 2, " 50-150", "100-300" }, /* 0x04 */
67 { _2x
, 4, " 25-75 ", " 50-150" }, /* 0x05 */
68 { _2_5x
, 2, " 40-120", "100-240" }, /* 0x06 */
69 { _4_5x
, 2, " 22-65 ", "100-300" }, /* 0x07 */
70 { _3x
, 2, " 33-100", "100-300" }, /* 0x08 */
71 { _5_5x
, 2, " 18-55 ", "100-300" }, /* 0x09 */
72 { _4x
, 2, " 25-75 ", "100-300" }, /* 0x0A */
73 { _5x
, 2, " 20-60 ", "100-300" }, /* 0x0B */
74 { _1_5x
, 8, " 16-50 ", " 16-50 " }, /* 0x0C */
75 { _6x
, 2, " 16-50 ", "100-300" }, /* 0x0D */
76 { _3_5x
, 2, " 30-85 ", "100-300" }, /* 0x0E */
77 { _off
, -1, " ?-? ", " ?-? " }, /* 0x0F */
78 { _3x
, 4, " 16-50 ", " 50-150" }, /* 0x10 */
79 { _2_5x
, 4, " 20-60 ", " 50-120" }, /* 0x11 */
80 { _6_5x
, 2, " 15-46 ", "100-300" }, /* 0x12 */
81 { _byp
, -1, " ?-? ", " ?-? " }, /* 0x13 */
82 { _7x
, 2, " 14-43 ", "100-300" }, /* 0x14 */
83 { _2x
, 4, " 25-75 ", " 50-150" }, /* 0x15 */
84 { _7_5x
, 2, " 13-40 ", "100-300" }, /* 0x16 */
85 { _4_5x
, 2, " 22-65 ", "100-300" }, /* 0x17 */
86 { _unk
, -1, " ?-? ", " ?-? " }, /* 0x18 */
87 { _5_5x
, 2, " 18-55 ", "100-300" }, /* 0x19 */
88 { _4x
, 2, " 25-75 ", "100-300" }, /* 0x1A */
89 { _5x
, 2, " 20-60 ", "100-300" }, /* 0x1B */
90 { _8x
, 2, " 12-38 ", "100-300" }, /* 0x1C */
91 { _6x
, 2, " 16-50 ", "100-300" }, /* 0x1D */
92 { _3_5x
, 2, " 30-85 ", "100-300" }, /* 0x1E */
93 { _off
, -1, " ?-? ", " ?-? " }, /* 0x1F */
96 /* ------------------------------------------------------------------------- */
102 int get_clocks (void)
104 DECLARE_GLOBAL_DATA_PTR
;
106 volatile immap_t
*immap
= (immap_t
*) CFG_IMMR
;
109 ulong scmr
, corecnf
, busdf
, cpmdf
, plldf
, pllmf
;
112 #if !defined(CONFIG_8260_CLKIN)
113 #error clock measuring not implemented yet - define CONFIG_8260_CLKIN
115 clkin
= CONFIG_8260_CLKIN
;
118 sccr
= immap
->im_clkrst
.car_sccr
;
119 dfbrg
= (sccr
& SCCR_DFBRG_MSK
) >> SCCR_DFBRG_SHIFT
;
121 scmr
= immap
->im_clkrst
.car_scmr
;
122 corecnf
= (scmr
& SCMR_CORECNF_MSK
) >> SCMR_CORECNF_SHIFT
;
123 cp
= &corecnf_tab
[corecnf
];
125 busdf
= (scmr
& SCMR_BUSDF_MSK
) >> SCMR_BUSDF_SHIFT
;
126 cpmdf
= (scmr
& SCMR_CPMDF_MSK
) >> SCMR_CPMDF_SHIFT
;
128 if (get_pvr () == PVR_8260_HIP7
) { /* HiP7 */
129 pllmf
= (scmr
& SCMR_PLLMF_MSKH7
) >> SCMR_PLLMF_SHIFT
;
130 gd
->vco_out
= clkin
* (pllmf
+ 1);
131 } else { /* HiP3, HiP4 */
132 pllmf
= (scmr
& SCMR_PLLMF_MSK
) >> SCMR_PLLMF_SHIFT
;
133 plldf
= (scmr
& SCMR_PLLDF
) ? 1 : 0;
134 gd
->vco_out
= (clkin
* 2 * (pllmf
+ 1)) / (plldf
+ 1);
137 if (gd
->vco_out
/ (busdf
+ 1) != clkin
) {
138 /* aaarrrggghhh!!! */
143 gd
->cpm_clk
= gd
->vco_out
/ 2;
145 gd
->scc_clk
= gd
->vco_out
/ 4;
146 gd
->brg_clk
= gd
->vco_out
/ (1 << (2 * (dfbrg
+ 1)));
148 if (cp
->b2c_mult
> 0) {
149 gd
->cpu_clk
= (clkin
* cp
->b2c_mult
) / 2;
157 int prt_8260_clks (void)
159 DECLARE_GLOBAL_DATA_PTR
;
161 volatile immap_t
*immap
= (immap_t
*) CFG_IMMR
;
163 ulong scmr
, corecnf
, busdf
, cpmdf
, plldf
, pllmf
;
166 sccr
= immap
->im_clkrst
.car_sccr
;
167 dfbrg
= (sccr
& SCCR_DFBRG_MSK
) >> SCCR_DFBRG_SHIFT
;
169 scmr
= immap
->im_clkrst
.car_scmr
;
170 corecnf
= (scmr
& SCMR_CORECNF_MSK
) >> SCMR_CORECNF_SHIFT
;
171 busdf
= (scmr
& SCMR_BUSDF_MSK
) >> SCMR_BUSDF_SHIFT
;
172 cpmdf
= (scmr
& SCMR_CPMDF_MSK
) >> SCMR_CPMDF_SHIFT
;
173 plldf
= (scmr
& SCMR_PLLDF
) ? 1 : 0;
174 pllmf
= (scmr
& SCMR_PLLMF_MSK
) >> SCMR_PLLMF_SHIFT
;
176 cp
= &corecnf_tab
[corecnf
];
178 printf (CPU_ID_STR
" Clock Configuration\n - Bus-to-Core Mult ");
180 switch (cp
->b2c_mult
) {
196 (cp
->b2c_mult
% 2) ? ".5" : "");
200 printf (", VCO Div %d, 60x Bus Freq %s, Core Freq %s\n",
201 cp
->vco_div
, cp
->freq_60x
, cp
->freq_core
);
203 printf (" - dfbrg %ld, corecnf 0x%02lx, busdf %ld, cpmdf %ld, "
204 "plldf %ld, pllmf %ld\n", dfbrg
, corecnf
, busdf
, cpmdf
, plldf
,
207 printf (" - vco_out %10ld, scc_clk %10ld, brg_clk %10ld\n",
208 gd
->vco_out
, gd
->scc_clk
, gd
->brg_clk
);
210 printf (" - cpu_clk %10ld, cpm_clk %10ld, bus_clk %10ld\n\n",
211 gd
->cpu_clk
, gd
->cpm_clk
, gd
->bus_clk
);
215 /* ------------------------------------------------------------------------- */