| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2012 secunet Security Networks AG |
| * (Written by Nico Huber <nico.huber@secunet.com> for secunet) |
| * |
| * 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; version 2 of the License. |
| * |
| * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <stdint.h> |
| #include <delay.h> |
| #include <console/console.h> |
| #include "gm45.h" |
| |
| static const int ddr3_lookup_schedule[6][2] = { |
| { 0, 1 }, { 2, 3 }, { 4, 5 }, { 4, 5 }, { 6, 7 }, { 6, 7 } |
| }; |
| /* Look-up table: |
| * a1step X idx X (group || pull-up/-down) |
| */ |
| static const u8 ddr3_lut[2][64][8] = { |
| { /* Stepping B3 and below. */ |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 8, 8, 3, 3, 3, 3, 5, 7 }, |
| { 9, 9, 3, 3, 3, 3, 6, 7 }, |
| { 9, 9, 3, 3, 3, 3, 6, 7 }, |
| { 10, 10, 3, 3, 3, 3, 7, 8 }, |
| { 11, 10, 3, 3, 3, 3, 7, 8 }, |
| { 12, 11, 3, 3, 3, 3, 8, 9 }, |
| { 13, 11, 3, 3, 3, 3, 9, 9 }, |
| { 14, 12, 3, 3, 3, 3, 9, 10 }, |
| { 15, 13, 3, 3, 3, 3, 9, 10 }, |
| { 16, 14, 3, 3, 3, 3, 9, 11 }, |
| { 18, 16, 3, 3, 3, 3, 10, 12 }, |
| { 20, 18, 4, 3, 4, 4, 10, 12 }, |
| { 22, 22, 4, 4, 4, 4, 11, 12 }, |
| { 24, 24, 4, 4, 4, 4, 11, 12 }, |
| { 28, 26, 4, 4, 4, 4, 12, 12 }, |
| { 32, 28, 5, 4, 5, 5, 12, 12 }, |
| { 36, 32, 5, 5, 5, 5, 13, 13 }, |
| { 40, 36, 5, 5, 5, 5, 14, 13 }, |
| { 43, 40, 5, 5, 5, 5, 15, 14 }, |
| { 43, 43, 5, 5, 6, 5, 15, 14 }, |
| { 43, 43, 6, 5, 6, 5, 15, 15 }, |
| { 43, 43, 6, 5, 6, 6, 15, 15 }, |
| { 43, 43, 6, 6, 6, 6, 15, 15 }, |
| { 43, 43, 6, 6, 7, 6, 15, 15 }, |
| { 43, 43, 7, 6, 7, 6, 15, 15 }, |
| { 43, 43, 7, 7, 7, 7, 15, 15 }, |
| { 43, 43, 7, 7, 7, 7, 15, 15 }, |
| { 43, 43, 7, 7, 7, 7, 15, 15 }, |
| { 43, 43, 8, 7, 8, 7, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| }, |
| { /* Stepping A1 and above. */ |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 8, 8, 3, 3, 3, 3, 5, 5 }, |
| { 9, 9, 3, 3, 3, 3, 6, 6 }, |
| { 9, 9, 3, 3, 3, 3, 6, 6 }, |
| { 10, 10, 3, 3, 3, 3, 7, 7 }, |
| { 10, 10, 3, 3, 3, 3, 7, 7 }, |
| { 12, 11, 3, 3, 3, 3, 8, 8 }, |
| { 13, 11, 3, 3, 3, 3, 9, 9 }, |
| { 14, 12, 3, 3, 3, 3, 9, 9 }, |
| { 15, 13, 3, 3, 3, 3, 9, 9 }, |
| { 16, 14, 3, 3, 3, 3, 9, 9 }, |
| { 18, 16, 3, 3, 3, 3, 10, 10 }, |
| { 20, 18, 4, 3, 4, 4, 10, 10 }, |
| { 22, 22, 4, 4, 4, 4, 11, 11 }, |
| { 24, 24, 4, 4, 4, 4, 11, 11 }, |
| { 28, 26, 4, 4, 4, 4, 12, 12 }, |
| { 32, 28, 5, 4, 5, 5, 12, 12 }, |
| { 36, 32, 5, 5, 5, 5, 13, 13 }, |
| { 40, 36, 5, 5, 5, 5, 14, 14 }, |
| { 43, 40, 5, 5, 5, 5, 15, 15 }, |
| { 43, 43, 5, 5, 6, 5, 15, 15 }, |
| { 43, 43, 6, 5, 6, 5, 15, 15 }, |
| { 43, 43, 6, 5, 6, 6, 15, 15 }, |
| { 43, 43, 6, 6, 6, 6, 15, 15 }, |
| { 43, 43, 6, 6, 7, 6, 15, 15 }, |
| { 43, 43, 7, 6, 7, 6, 15, 15 }, |
| { 43, 43, 7, 7, 7, 7, 15, 15 }, |
| { 43, 43, 7, 7, 7, 7, 15, 15 }, |
| { 43, 43, 7, 7, 7, 7, 15, 15 }, |
| { 43, 43, 8, 7, 8, 7, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| { 43, 43, 8, 8, 8, 8, 15, 15 }, |
| } |
| }; |
| static void lookup_and_write(const int a1step, |
| const int row, const int col, |
| unsigned int mchbar) |
| { |
| int i; |
| |
| /* Write 4 32-bit registers, 4 values each. */ |
| for (i = row; i < row + 16; i += 4) { |
| MCHBAR32(mchbar) = |
| ((ddr3_lut[a1step][i + 0][col] & 0x3f) << 0) | |
| ((ddr3_lut[a1step][i + 1][col] & 0x3f) << 8) | |
| ((ddr3_lut[a1step][i + 2][col] & 0x3f) << 16) | |
| ((ddr3_lut[a1step][i + 3][col] & 0x3f) << 24); |
| mchbar += 4; |
| } |
| } |
| void raminit_rcomp_calibration(const stepping_t stepping) { |
| const int a1step = stepping >= STEPPING_CONVERSION_A1; |
| |
| int i; |
| |
| enum { |
| PULL_UP = 0, |
| PULL_DOWN = 1, |
| }; |
| /* channel X group X pull-up/-down */ |
| char lut_idx[2][6][2]; |
| for (i = 0; i < 2 * 6 * 2; ++i) |
| ((char *)lut_idx)[i] = -1; |
| |
| MCHBAR32(0x400) |= (1 << 2); |
| MCHBAR32(0x418) |= (1 << 17); |
| MCHBAR32(0x40c) &= ~(1 << 23); |
| MCHBAR32(0x41c) &= ~((1 << 7) | (1 << 3)); |
| MCHBAR32(0x400) |= 1; |
| |
| /* Read lookup indices. */ |
| for (i = 0; i < 12; ++i) { |
| do { |
| MCHBAR32(0x400) |= (1 << 3); |
| udelay(10); |
| MCHBAR32(0x400) &= ~(1 << 3); |
| } while ((MCHBAR32(0x530) & 0x7) != 0x4); |
| u32 reg = MCHBAR32(0x400); |
| const unsigned int group = (reg >> 13) & 0x7; |
| const unsigned int channel = (reg >> 12) & 0x1; |
| if (group > 5) |
| break; |
| reg = MCHBAR32(0x518); |
| lut_idx[channel][group][PULL_UP] = (reg >> 24) & 0x7f; |
| lut_idx[channel][group][PULL_DOWN] = (reg >> 16) & 0x7f; |
| } |
| /* Cleanup? */ |
| MCHBAR32(0x400) |= (1 << 3); |
| udelay(10); |
| MCHBAR32(0x400) &= ~(1 << 3); |
| MCHBAR32(0x400) &= ~(1 << 2); |
| |
| /* Check for consistency. */ |
| for (i = 0; i < 2 * 6 * 2; ++i) { |
| const char idx = ((char *)lut_idx)[i]; |
| if ((idx < 7) || (idx > 55)) |
| die("Bad RCOMP calibration lookup index.\n"); |
| } |
| |
| /* Lookup values and fill registers. */ |
| int channel, group, pu_pd; |
| unsigned int mchbar = 0x0680; |
| for (channel = 0; channel < 2; ++channel) { |
| for (group = 0; group < 6; ++group) { |
| for (pu_pd = PULL_DOWN; pu_pd >= PULL_UP; --pu_pd) { |
| lookup_and_write( |
| a1step, |
| lut_idx[channel][group][pu_pd] - 7, |
| ddr3_lookup_schedule[group][pu_pd], |
| mchbar); |
| mchbar += 0x0018; |
| } |
| mchbar += 0x0010; |
| /* Channel B knows only the first two groups. */ |
| if ((1 == channel) && (1 == group)) |
| break; |
| } |
| mchbar += 0x0040; |
| } |
| } |
| |
