wdenk | 4a9cbbe | 2002-08-27 09:48:53 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * (C) Copyright 2000-2002 |
| 3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 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. |
| 12 | * |
| 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. |
| 17 | * |
| 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, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #include <common.h> |
| 25 | #include <mpc8260.h> |
| 26 | #include <asm/processor.h> |
| 27 | |
| 28 | /* ------------------------------------------------------------------------- */ |
| 29 | |
| 30 | /* Bus-to-Core Multiplier */ |
| 31 | #define _1x 2 |
| 32 | #define _1_5x 3 |
| 33 | #define _2x 4 |
| 34 | #define _2_5x 5 |
| 35 | #define _3x 6 |
| 36 | #define _3_5x 7 |
| 37 | #define _4x 8 |
| 38 | #define _4_5x 9 |
| 39 | #define _5x 10 |
| 40 | #define _5_5x 11 |
| 41 | #define _6x 12 |
| 42 | #define _6_5x 13 |
| 43 | #define _7x 14 |
| 44 | #define _7_5x 15 |
| 45 | #define _8x 16 |
| 46 | #define _byp -1 |
| 47 | #define _off -2 |
| 48 | #define _unk -3 |
| 49 | |
| 50 | typedef struct { |
| 51 | int b2c_mult; |
| 52 | int vco_div; |
| 53 | char *freq_60x; |
| 54 | char *freq_core; |
| 55 | } corecnf_t; |
| 56 | |
| 57 | /* |
| 58 | * this table based on "Errata to MPC8260 PowerQUICC II User's Manual", |
| 59 | * Rev. 1, 8/2000, page 10. |
| 60 | */ |
| 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 */ |
| 94 | }; |
| 95 | |
| 96 | /* ------------------------------------------------------------------------- */ |
| 97 | |
| 98 | /* |
| 99 | * |
| 100 | */ |
| 101 | |
| 102 | int get_clocks (void) |
| 103 | { |
| 104 | DECLARE_GLOBAL_DATA_PTR; |
| 105 | |
| 106 | volatile immap_t *immap = (immap_t *) CFG_IMMR; |
| 107 | ulong clkin; |
| 108 | ulong sccr, dfbrg; |
| 109 | ulong scmr, corecnf, busdf, cpmdf, plldf, pllmf; |
| 110 | corecnf_t *cp; |
| 111 | |
| 112 | #if !defined(CONFIG_8260_CLKIN) |
| 113 | #error clock measuring not implemented yet - define CONFIG_8260_CLKIN |
| 114 | #else |
| 115 | clkin = CONFIG_8260_CLKIN; |
| 116 | #endif |
| 117 | |
| 118 | sccr = immap->im_clkrst.car_sccr; |
| 119 | dfbrg = (sccr & SCCR_DFBRG_MSK) >> SCCR_DFBRG_SHIFT; |
| 120 | |
| 121 | scmr = immap->im_clkrst.car_scmr; |
| 122 | corecnf = (scmr & SCMR_CORECNF_MSK) >> SCMR_CORECNF_SHIFT; |
| 123 | busdf = (scmr & SCMR_BUSDF_MSK) >> SCMR_BUSDF_SHIFT; |
| 124 | cpmdf = (scmr & SCMR_CPMDF_MSK) >> SCMR_CPMDF_SHIFT; |
| 125 | plldf = (scmr & SCMR_PLLDF) ? 1 : 0; |
| 126 | pllmf = (scmr & SCMR_PLLMF_MSK) >> SCMR_PLLMF_SHIFT; |
| 127 | |
| 128 | cp = &corecnf_tab[corecnf]; |
| 129 | |
| 130 | gd->vco_out = (clkin * 2 * (pllmf + 1)) / (plldf + 1); |
| 131 | |
| 132 | #if 0 |
| 133 | if (gd->vco_out / (busdf + 1) != clkin) { |
| 134 | /* aaarrrggghhh!!! */ |
| 135 | return (1); |
| 136 | } |
| 137 | #endif |
| 138 | |
| 139 | gd->cpm_clk = gd->vco_out / 2; |
| 140 | gd->bus_clk = clkin; |
| 141 | gd->scc_clk = gd->vco_out / 4; |
| 142 | gd->brg_clk = gd->vco_out / (1 << (2 * (dfbrg + 1))); |
| 143 | |
| 144 | if (cp->b2c_mult > 0) { |
| 145 | gd->cpu_clk = (clkin * cp->b2c_mult) / 2; |
| 146 | } else { |
| 147 | gd->cpu_clk = clkin; |
| 148 | } |
| 149 | |
| 150 | return (0); |
| 151 | } |
| 152 | |
| 153 | int prt_8260_clks (void) |
| 154 | { |
| 155 | DECLARE_GLOBAL_DATA_PTR; |
| 156 | |
| 157 | volatile immap_t *immap = (immap_t *) CFG_IMMR; |
| 158 | ulong sccr, dfbrg; |
| 159 | ulong scmr, corecnf, busdf, cpmdf, plldf, pllmf; |
| 160 | corecnf_t *cp; |
| 161 | |
| 162 | sccr = immap->im_clkrst.car_sccr; |
| 163 | dfbrg = (sccr & SCCR_DFBRG_MSK) >> SCCR_DFBRG_SHIFT; |
| 164 | |
| 165 | scmr = immap->im_clkrst.car_scmr; |
| 166 | corecnf = (scmr & SCMR_CORECNF_MSK) >> SCMR_CORECNF_SHIFT; |
| 167 | busdf = (scmr & SCMR_BUSDF_MSK) >> SCMR_BUSDF_SHIFT; |
| 168 | cpmdf = (scmr & SCMR_CPMDF_MSK) >> SCMR_CPMDF_SHIFT; |
| 169 | plldf = (scmr & SCMR_PLLDF) ? 1 : 0; |
| 170 | pllmf = (scmr & SCMR_PLLMF_MSK) >> SCMR_PLLMF_SHIFT; |
| 171 | |
| 172 | cp = &corecnf_tab[corecnf]; |
| 173 | |
| 174 | printf ("MPC8260 Clock Configuration\n - Bus-to-Core Mult "); |
| 175 | |
| 176 | switch (cp->b2c_mult) { |
| 177 | case _byp: |
| 178 | printf ("BYPASS"); |
| 179 | break; |
| 180 | |
| 181 | case _off: |
| 182 | printf ("OFF"); |
| 183 | break; |
| 184 | |
| 185 | case _unk: |
| 186 | printf ("UNKNOWN"); |
| 187 | break; |
| 188 | |
| 189 | default: |
| 190 | printf ("%d%sx", |
| 191 | cp->b2c_mult / 2, |
| 192 | (cp->b2c_mult % 2) ? ".5" : ""); |
| 193 | break; |
| 194 | } |
| 195 | |
| 196 | printf (", VCO Div %d, 60x Bus Freq %s, Core Freq %s\n", |
| 197 | cp->vco_div, cp->freq_60x, cp->freq_core); |
| 198 | |
| 199 | printf (" - dfbrg %ld, corecnf 0x%02lx, busdf %ld, cpmdf %ld, " |
| 200 | "plldf %ld, pllmf %ld\n", dfbrg, corecnf, busdf, cpmdf, plldf, |
| 201 | pllmf); |
| 202 | |
| 203 | printf (" - vco_out %10ld, scc_clk %10ld, brg_clk %10ld\n", |
| 204 | gd->vco_out, gd->scc_clk, gd->brg_clk); |
| 205 | |
| 206 | printf (" - cpu_clk %10ld, cpm_clk %10ld, bus_clk %10ld\n\n", |
| 207 | gd->cpu_clk, gd->cpm_clk, gd->bus_clk); |
| 208 | return (0); |
| 209 | } |
| 210 | |
| 211 | /* ------------------------------------------------------------------------- */ |