+++ /dev/null
-/*
- * (C) Copyright 2005-2007
- * Stefan Roese, DENX Software Engineering, sr@denx.de.
- *
- * (C) Copyright 2006
- * DAVE Srl <www.dave-tech.it>
- *
- * (C) Copyright 2002-2004
- * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
- *
- * 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 <ppc4xx.h>
-#include <asm/processor.h>
-#include "sdram.h"
-#include "ecc.h"
-
-#ifdef CONFIG_SDRAM_BANK0
-
-#ifndef CONFIG_440
-
-#ifndef CONFIG_SYS_SDRAM_TABLE
-sdram_conf_t mb0cf[] = {
- {(128 << 20), 13, 0x000A4001}, /* (0-128MB) Address Mode 3, 13x10(4) */
- {(64 << 20), 13, 0x00084001}, /* (0-64MB) Address Mode 3, 13x9(4) */
- {(32 << 20), 12, 0x00062001}, /* (0-32MB) Address Mode 2, 12x9(4) */
- {(16 << 20), 12, 0x00046001}, /* (0-16MB) Address Mode 4, 12x8(4) */
- {(4 << 20), 11, 0x00008001}, /* (0-4MB) Address Mode 5, 11x8(2) */
-};
-#else
-sdram_conf_t mb0cf[] = CONFIG_SYS_SDRAM_TABLE;
-#endif
-
-#define N_MB0CF (sizeof(mb0cf) / sizeof(mb0cf[0]))
-
-#ifdef CONFIG_SYS_SDRAM_CASL
-static ulong ns2clks(ulong ns)
-{
- ulong bus_period_x_10 = ONE_BILLION / (get_bus_freq(0) / 10);
-
- return ((ns * 10) + bus_period_x_10) / bus_period_x_10;
-}
-#endif /* CONFIG_SYS_SDRAM_CASL */
-
-static ulong compute_sdtr1(ulong speed)
-{
-#ifdef CONFIG_SYS_SDRAM_CASL
- ulong tmp;
- ulong sdtr1 = 0;
-
- /* CASL */
- if (CONFIG_SYS_SDRAM_CASL < 2)
- sdtr1 |= (1 << SDRAM0_TR_CASL);
- else
- if (CONFIG_SYS_SDRAM_CASL > 4)
- sdtr1 |= (3 << SDRAM0_TR_CASL);
- else
- sdtr1 |= ((CONFIG_SYS_SDRAM_CASL-1) << SDRAM0_TR_CASL);
-
- /* PTA */
- tmp = ns2clks(CONFIG_SYS_SDRAM_PTA);
- if ((tmp >= 2) && (tmp <= 4))
- sdtr1 |= ((tmp-1) << SDRAM0_TR_PTA);
- else
- sdtr1 |= ((4-1) << SDRAM0_TR_PTA);
-
- /* CTP */
- tmp = ns2clks(CONFIG_SYS_SDRAM_CTP);
- if ((tmp >= 2) && (tmp <= 4))
- sdtr1 |= ((tmp-1) << SDRAM0_TR_CTP);
- else
- sdtr1 |= ((4-1) << SDRAM0_TR_CTP);
-
- /* LDF */
- tmp = ns2clks(CONFIG_SYS_SDRAM_LDF);
- if ((tmp >= 2) && (tmp <= 4))
- sdtr1 |= ((tmp-1) << SDRAM0_TR_LDF);
- else
- sdtr1 |= ((2-1) << SDRAM0_TR_LDF);
-
- /* RFTA */
- tmp = ns2clks(CONFIG_SYS_SDRAM_RFTA);
- if ((tmp >= 4) && (tmp <= 10))
- sdtr1 |= ((tmp-4) << SDRAM0_TR_RFTA);
- else
- sdtr1 |= ((10-4) << SDRAM0_TR_RFTA);
-
- /* RCD */
- tmp = ns2clks(CONFIG_SYS_SDRAM_RCD);
- if ((tmp >= 2) && (tmp <= 4))
- sdtr1 |= ((tmp-1) << SDRAM0_TR_RCD);
- else
- sdtr1 |= ((4-1) << SDRAM0_TR_RCD);
-
- return sdtr1;
-#else /* CONFIG_SYS_SDRAM_CASL */
- /*
- * If no values are configured in the board config file
- * use the default values, which seem to be ok for most
- * boards.
- *
- * REMARK:
- * For new board ports we strongly recommend to define the
- * correct values for the used SDRAM chips in your board
- * config file (see PPChameleonEVB.h)
- */
- if (speed > 100000000) {
- /*
- * 133 MHz SDRAM
- */
- return 0x01074015;
- } else {
- /*
- * default: 100 MHz SDRAM
- */
- return 0x0086400d;
- }
-#endif /* CONFIG_SYS_SDRAM_CASL */
-}
-
-/* refresh is expressed in ms */
-static ulong compute_rtr(ulong speed, ulong rows, ulong refresh)
-{
-#ifdef CONFIG_SYS_SDRAM_CASL
- ulong tmp;
-
- tmp = ((refresh*1000*1000) / (1 << rows)) * (speed / 1000);
- tmp /= 1000000;
-
- return ((tmp & 0x00003FF8) << 16);
-#else /* CONFIG_SYS_SDRAM_CASL */
- if (speed > 100000000) {
- /*
- * 133 MHz SDRAM
- */
- return 0x07f00000;
- } else {
- /*
- * default: 100 MHz SDRAM
- */
- return 0x05f00000;
- }
-#endif /* CONFIG_SYS_SDRAM_CASL */
-}
-
-/*
- * Autodetect onboard SDRAM on 405 platforms
- */
-phys_size_t initdram(int board_type)
-{
- ulong speed;
- ulong sdtr1;
- int i;
-
- /*
- * Determine SDRAM speed
- */
- speed = get_bus_freq(0); /* parameter not used on ppc4xx */
-
- /*
- * sdtr1 (register SDRAM0_TR) must take into account timings listed
- * in SDRAM chip datasheet. rtr (register SDRAM0_RTR) must take into
- * account actual SDRAM size. So we can set up sdtr1 according to what
- * is specified in board configuration file while rtr dependds on SDRAM
- * size we are assuming before detection.
- */
- sdtr1 = compute_sdtr1(speed);
-
- for (i=0; i<N_MB0CF; i++) {
- /*
- * Disable memory controller.
- */
- mtsdram(SDRAM0_CFG, 0x00000000);
-
- /*
- * Set MB0CF for bank 0.
- */
- mtsdram(SDRAM0_B0CR, mb0cf[i].reg);
- mtsdram(SDRAM0_TR, sdtr1);
- mtsdram(SDRAM0_RTR, compute_rtr(speed, mb0cf[i].rows, 64));
-
- udelay(200);
-
- /*
- * Set memory controller options reg, MCOPT1.
- * Set DC_EN to '1' and BRD_PRF to '01' for 16 byte PLB Burst
- * read/prefetch.
- */
- mtsdram(SDRAM0_CFG, 0x80800000);
-
- udelay(10000);
-
- if (get_ram_size(0, mb0cf[i].size) == mb0cf[i].size) {
- phys_size_t size = mb0cf[i].size;
-
- /*
- * OK, size detected. Enable second bank if
- * defined (assumes same type as bank 0)
- */
-#ifdef CONFIG_SDRAM_BANK1
- mtsdram(SDRAM0_CFG, 0x00000000);
- mtsdram(SDRAM0_B1CR, mb0cf[i].size | mb0cf[i].reg);
- mtsdram(SDRAM0_CFG, 0x80800000);
- udelay(10000);
-
- /*
- * Check if 2nd bank is really available.
- * If the size not equal to the size of the first
- * bank, then disable the 2nd bank completely.
- */
- if (get_ram_size((long *)mb0cf[i].size, mb0cf[i].size) !=
- mb0cf[i].size) {
- mtsdram(SDRAM0_B1CR, 0);
- mtsdram(SDRAM0_CFG, 0);
- } else {
- /*
- * We have two identical banks, so the size
- * is twice the bank size
- */
- size = 2 * size;
- }
-#endif
-
- /*
- * OK, size detected -> all done
- */
- return size;
- }
- }
-
- return 0;
-}
-
-#else /* CONFIG_440 */
-
-/*
- * Define some default values. Those can be overwritten in the
- * board config file.
- */
-
-#ifndef CONFIG_SYS_SDRAM_TABLE
-sdram_conf_t mb0cf[] = {
- {(256 << 20), 13, 0x000C4001}, /* 256MB mode 3, 13x10(4) */
- {(128 << 20), 13, 0x000A4001}, /* 128MB mode 3, 13x10(4) */
- {(64 << 20), 12, 0x00082001} /* 64MB mode 2, 12x9(4) */
-};
-#else
-sdram_conf_t mb0cf[] = CONFIG_SYS_SDRAM_TABLE;
-#endif
-
-#ifndef CONFIG_SYS_SDRAM0_TR0
-#define CONFIG_SYS_SDRAM0_TR0 0x41094012
-#endif
-
-#ifndef CONFIG_SYS_SDRAM0_WDDCTR
-#define CONFIG_SYS_SDRAM0_WDDCTR 0x00000000 /* wrcp=0 dcd=0 */
-#endif
-
-#ifndef CONFIG_SYS_SDRAM0_RTR
-#define CONFIG_SYS_SDRAM0_RTR 0x04100000 /* 7.8us @ 133MHz PLB */
-#endif
-
-#ifndef CONFIG_SYS_SDRAM0_CFG0
-#define CONFIG_SYS_SDRAM0_CFG0 0x82000000 /* DCEN=1, PMUD=0, 64-bit */
-#endif
-
-#define N_MB0CF (sizeof(mb0cf) / sizeof(mb0cf[0]))
-
-#define NUM_TRIES 64
-#define NUM_READS 10
-
-static void sdram_tr1_set(int ram_address, int* tr1_value)
-{
- int i;
- int j, k;
- volatile unsigned int* ram_pointer = (unsigned int *)ram_address;
- int first_good = -1, last_bad = 0x1ff;
-
- unsigned long test[NUM_TRIES] = {
- 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF,
- 0x00000000, 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF,
- 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000,
- 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000,
- 0xAAAAAAAA, 0xAAAAAAAA, 0x55555555, 0x55555555,
- 0xAAAAAAAA, 0xAAAAAAAA, 0x55555555, 0x55555555,
- 0x55555555, 0x55555555, 0xAAAAAAAA, 0xAAAAAAAA,
- 0x55555555, 0x55555555, 0xAAAAAAAA, 0xAAAAAAAA,
- 0xA5A5A5A5, 0xA5A5A5A5, 0x5A5A5A5A, 0x5A5A5A5A,
- 0xA5A5A5A5, 0xA5A5A5A5, 0x5A5A5A5A, 0x5A5A5A5A,
- 0x5A5A5A5A, 0x5A5A5A5A, 0xA5A5A5A5, 0xA5A5A5A5,
- 0x5A5A5A5A, 0x5A5A5A5A, 0xA5A5A5A5, 0xA5A5A5A5,
- 0xAA55AA55, 0xAA55AA55, 0x55AA55AA, 0x55AA55AA,
- 0xAA55AA55, 0xAA55AA55, 0x55AA55AA, 0x55AA55AA,
- 0x55AA55AA, 0x55AA55AA, 0xAA55AA55, 0xAA55AA55,
- 0x55AA55AA, 0x55AA55AA, 0xAA55AA55, 0xAA55AA55 };
-
- /* go through all possible SDRAM0_TR1[RDCT] values */
- for (i=0; i<=0x1ff; i++) {
- /* set the current value for TR1 */
- mtsdram(SDRAM0_TR1, (0x80800800 | i));
-
- /* write values */
- for (j=0; j<NUM_TRIES; j++) {
- ram_pointer[j] = test[j];
-
- /* clear any cache at ram location */
- __asm__("dcbf 0,%0": :"r" (&ram_pointer[j]));
- }
-
- /* read values back */
- for (j=0; j<NUM_TRIES; j++) {
- for (k=0; k<NUM_READS; k++) {
- /* clear any cache at ram location */
- __asm__("dcbf 0,%0": :"r" (&ram_pointer[j]));
-
- if (ram_pointer[j] != test[j])
- break;
- }
-
- /* read error */
- if (k != NUM_READS)
- break;
- }
-
- /* we have a SDRAM0_TR1[RDCT] that is part of the window */
- if (j == NUM_TRIES) {
- if (first_good == -1)
- first_good = i; /* found beginning of window */
- } else { /* bad read */
- /* if we have not had a good read then don't care */
- if (first_good != -1) {
- /* first failure after a good read */
- last_bad = i-1;
- break;
- }
- }
- }
-
- /* return the current value for TR1 */
- *tr1_value = (first_good + last_bad) / 2;
-}
-
-/*
- * Autodetect onboard DDR SDRAM on 440 platforms
- *
- * NOTE: Some of the hardcoded values are hardware dependant,
- * so this should be extended for other future boards
- * using this routine!
- */
-phys_size_t initdram(int board_type)
-{
- int i;
- int tr1_bank1;
-
-#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || \
- defined(CONFIG_440GR) || defined(CONFIG_440SP)
- /*
- * Soft-reset SDRAM controller.
- */
- mtsdr(SDR0_SRST, SDR0_SRST_DMC);
- mtsdr(SDR0_SRST, 0x00000000);
-#endif
-
- for (i=0; i<N_MB0CF; i++) {
- /*
- * Disable memory controller.
- */
- mtsdram(SDRAM0_CFG0, 0x00000000);
-
- /*
- * Setup some default
- */
- mtsdram(SDRAM0_UABBA, 0x00000000); /* ubba=0 (default) */
- mtsdram(SDRAM0_SLIO, 0x00000000); /* rdre=0 wrre=0 rarw=0 */
- mtsdram(SDRAM0_DEVOPT, 0x00000000); /* dll=0 ds=0 (normal) */
- mtsdram(SDRAM0_WDDCTR, CONFIG_SYS_SDRAM0_WDDCTR);
- mtsdram(SDRAM0_CLKTR, 0x40000000); /* clkp=1 (90 deg wr) dcdt=0 */
-
- /*
- * Following for CAS Latency = 2.5 @ 133 MHz PLB
- */
- mtsdram(SDRAM0_B0CR, mb0cf[i].reg);
- mtsdram(SDRAM0_TR0, CONFIG_SYS_SDRAM0_TR0);
- mtsdram(SDRAM0_TR1, 0x80800800); /* SS=T2 SL=STAGE 3 CD=1 CT=0x00*/
- mtsdram(SDRAM0_RTR, CONFIG_SYS_SDRAM0_RTR);
- mtsdram(SDRAM0_CFG1, 0x00000000); /* Self-refresh exit, disable PM*/
- udelay(400); /* Delay 200 usecs (min) */
-
- /*
- * Enable the controller, then wait for DCEN to complete
- */
- mtsdram(SDRAM0_CFG0, CONFIG_SYS_SDRAM0_CFG0);
- udelay(10000);
-
- if (get_ram_size(0, mb0cf[i].size) == mb0cf[i].size) {
- phys_size_t size = mb0cf[i].size;
- /*
- * Optimize TR1 to current hardware environment
- */
- sdram_tr1_set(0x00000000, &tr1_bank1);
- mtsdram(SDRAM0_TR1, (tr1_bank1 | 0x80800800));
-
-
- /*
- * OK, size detected. Enable second bank if
- * defined (assumes same type as bank 0)
- */
-#ifdef CONFIG_SDRAM_BANK1
- mtsdram(SDRAM0_CFG0, 0);
- mtsdram(SDRAM0_B1CR, mb0cf[i].size | mb0cf[i].reg);
- mtsdram(SDRAM0_CFG0, CONFIG_SYS_SDRAM0_CFG0);
- udelay(10000);
-
- /*
- * Check if 2nd bank is really available.
- * If the size not equal to the size of the first
- * bank, then disable the 2nd bank completely.
- */
- if (get_ram_size((long *)mb0cf[i].size, mb0cf[i].size)
- != mb0cf[i].size) {
- mtsdram(SDRAM0_CFG0, 0);
- mtsdram(SDRAM0_B1CR, 0);
- mtsdram(SDRAM0_CFG0, CONFIG_SYS_SDRAM0_CFG0);
- udelay(10000);
- } else {
- /*
- * We have two identical banks, so the size
- * is twice the bank size
- */
- size = 2 * size;
- }
-#endif
-
-#ifdef CONFIG_SDRAM_ECC
- ecc_init(0, size);
-#endif
-
- /*
- * OK, size detected -> all done
- */
- return size;
- }
- }
-
- return 0; /* nothing found ! */
-}
-
-#endif /* CONFIG_440 */
-
-#endif /* CONFIG_SDRAM_BANK0 */
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