* (C) Copyright 2007
* Stefan Roese, DENX Software Engineering, sr@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
+ * SPDX-License-Identifier: GPL-2.0+
*/
+/* define DEBUG for debugging output (obviously ;-)) */
+#if 0
+#define DEBUG
+#endif
+
#include <common.h>
#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/ppc4xx-gpio.h>
-#define CRAM_BANK0_BASE 0x0
-#define CRAM_DIDR 0x00100000
-#define MICRON_MT45W8MW16BGX_CRAM_ID 0x1b431b43
-#define MICRON_MT45W8MW16BGX_CRAM_ID2 0x13431343
-#define MICRON_DIDR_VENDOR_ID 0x00030003 /* 00011b */
-#define CRAM_DIDR_VENDOR_ID_MASK 0x001f001f /* DIDR[4:0] */
-#define CRAM_DEVID_NOT_SUPPORTED 0x00000000
-
-#define PSRAM_PASS 0x50415353 /* "PASS" */
-#define PSRAM_FAIL 0x4641494C /* "FAIL" */
-
-static u32 is_cram_inited(void);
-static u32 is_cram(void);
-static long int cram_init(u32);
-static void cram_bcr_write(u32);
-void udelay (unsigned long);
-
-void sdram_init(void)
-{
- volatile unsigned long spr_reg;
+DECLARE_GLOBAL_DATA_PTR;
- /*
- * If CRAM not initialized or CRAM looks initialized because this
- * is after a warm reboot then set SPRG7 to indicate CRAM needs
- * initialization. Note that CRAM is initialized by the SPI and
- * NAND preloader.
- */
- spr_reg = (volatile unsigned long) mfspr(SPRG6);
- if ((is_cram_inited() != 1) || (spr_reg != LOAK_SPL)) {
- mtspr(SPRG7, LOAK_NONE); /* "NONE" */
- }
-#if 1
- /*
- * When running the NAND SPL, the normal EBC configuration is not
- * done, so We need to enable EPLD access on EBC_CS_2 and the memory
- * on EBC_CS_3
- */
-
- /* Enable CPLD - Needed for PSRAM Access */
-
-
- /* Init SDRAM by setting EBC Bank 3 for PSRAM */
- mtebc(pb1ap, CFG_EBC_PB1AP);
- mtebc(pb1cr, CFG_EBC_PB1CR);
-
- mtebc(pb2ap, CFG_EBC_PB2AP);
- mtebc(pb2cr, CFG_EBC_PB2CR);
-
- /* pre-boot loader code: we are in OCM */
- mtspr(SPRG6, LOAK_SPL); /* "SPL " */
- mtspr(SPRG7, LOAK_OCM); /* "OCM " */
-#endif
- return;
-}
+extern void board_pll_init_f(void);
static void cram_bcr_write(u32 wr_val)
{
- u32 tmp_reg;
- u32 val;
- volatile u32 gpio_reg;
+ wr_val <<= 2;
- /* # Program CRAM write */
+ /* set CRAM_CRE to 1 */
+ gpio_write_bit(CONFIG_SYS_GPIO_CRAM_CRE, 1);
- /*
- * set CRAM_CRE = 0x1
- * set wr_val = wr_val << 2
- */
- gpio_reg = in32(GPIO1_OR);
- out32(GPIO1_OR, gpio_reg | 0x00000400);
- wr_val = wr_val << 2;
- /* wr_val = 0x1c048; */
+ /* Write BCR to CRAM on CS1 */
+ out32(wr_val + 0x00200000, 0);
+ debug("CRAM VAL: %08x for CS1 ", wr_val + 0x00200000);
- /*
- * # stop PLL clock before programming CRAM
- * set EPLD0_MUX_CTL.OESPR3 = 1
- * delay 2
- */
+ /* Write BCR to CRAM on CS2 */
+ out32(wr_val + 0x02200000, 0);
+ debug("CRAM VAL: %08x for CS2\n", wr_val + 0x02200000);
- /*
- * # CS1
- * read 0x00200000
- * #shift 2 bit left before write
- * set val = wr_val + 0x00200000
- * write dmem val 0
- * read 0x00200000 val
- * print val/8x
- */
- tmp_reg = in32(0x00200000);
- val = wr_val + 0x00200000;
- /* val = 0x0021c048; */
- out32(val, 0x0000);
- udelay(100000);
- val = in32(0x00200000);
+ sync();
+ eieio();
- debug("CRAM VAL: %x for CS1 ", val);
+ /* set CRAM_CRE back to 0 (normal operation) */
+ gpio_write_bit(CONFIG_SYS_GPIO_CRAM_CRE, 0);
- /*
- * # CS2
- * read 0x02200000
- * #shift 2 bit left before write
- * set val = wr_val + 0x02200000
- * write dmem val 0
- * read 0x02200000 val
- * print val/8x
- */
- tmp_reg = in32(0x02200000);
- val = wr_val + 0x02200000;
- /* val = 0x0221c048; */
- out32(val, 0x0000);
- udelay(100000);
- val = in32(0x02200000);
-
- debug("CRAM VAL: %x for CS2 ", val);
-
- /*
- * # Start PLL clock before programming CRAM
- * set EPLD0_MUX_CTL.OESPR3 = 0
- */
-
- /*
- * set CRAMCR = 0x1
- */
- gpio_reg = in32(GPIO1_OR);
- out32(GPIO1_OR, gpio_reg | 0x00000400);
-
- /*
- * # read CRAM config BCR ( bit19:18 = 10b )
- * #read 0x00200000
- * # 1001_1001_0001_1111 ( 991f ) =>
- * #10_0110_0100_0111_1100 => 2647c => 0022647c
- * #0011_0010_0011_1110 (323e)
- * #
- */
-
- /*
- * set EPLD0_MUX_CTL.CRAMCR = 0x0
- */
- gpio_reg = in32(GPIO1_OR);
- out32(GPIO1_OR, gpio_reg & 0xFFFFFBFF);
return;
}
-static u32 is_cram_inited()
-{
- volatile unsigned long spr_reg;
-
- /*
- * If CRAM is initialized already, then don't reinitialize it again.
- * In the case of NAND boot and SPI boot, CRAM will already be
- * initialized by the pre-loader
- */
- spr_reg = (volatile unsigned long) mfspr(SPRG7);
- if (spr_reg == LOAK_CRAM) {
- return 1;
- } else {
- return 0;
- }
-}
-
-/******
- * return 0 if not CRAM
- * return 1 if CRAM and it's already inited by preloader
- * else return cram_id (CRAM Device Identification Register)
- ******/
-static u32 is_cram(void)
+int dram_init(void)
{
- u32 gpio_TCR, gpio_OSRL, gpio_OR, gpio_ISR1L;
- volatile u32 gpio_reg;
- volatile u32 cram_id = 0;
-
- if (is_cram_inited() == 1) {
- /* this is CRAM and it is already inited (by preloader) */
- cram_id = 1;
- } else {
- /*
- * # CRAM CLOCK
- * set GPIO0_TCR.G8 = 1
- * set GPIO0_OSRL.G8 = 0
- * set GPIO0_OR.G8 = 0
- */
- gpio_reg = in32(GPIO0_TCR);
- gpio_TCR = gpio_reg;
- out32(GPIO0_TCR, gpio_reg | 0x00800000);
- gpio_reg = in32(GPIO0_OSRL);
- gpio_OSRL = gpio_reg;
- out32(GPIO0_OSRL, gpio_reg & 0xffffbfff);
- gpio_reg = in32(GPIO0_OR);
- gpio_OR = gpio_reg;
- out32(GPIO0_OR, gpio_reg & 0xff7fffff);
-
- /*
- * # CRAM Addreaa Valid
- * set GPIO0_TCR.G10 = 1
- * set GPIO0_OSRL.G10 = 0
- * set GPIO0_OR.G10 = 0
- */
- gpio_reg = in32(GPIO0_TCR);
- out32(GPIO0_TCR, gpio_reg | 0x00200000);
- gpio_reg = in32(GPIO0_OSRL);
- out32(GPIO0_OSRL, gpio_reg & 0xfffffbff);
- gpio_reg = in32(GPIO0_OR);
- out32(GPIO0_OR, gpio_reg & 0xffdfffff);
-
- /*
- * # config input (EBC_WAIT)
- * set GPIO0_ISR1L.G9 = 1
- * set GPIO0_TCR.G9 = 0
- */
- gpio_reg = in32(GPIO0_ISR1L);
- gpio_ISR1L = gpio_reg;
- out32(GPIO0_ISR1L, gpio_reg | 0x00001000);
- gpio_reg = in32(GPIO0_TCR);
- out32(GPIO0_TCR, gpio_reg & 0xffbfffff);
-
- /*
- * Enable CRE to read Registers
- * set GPIO0_TCR.21 = 1
- * set GPIO1_OR.21 = 1
- */
- gpio_reg = in32(GPIO1_TCR);
- out32(GPIO1_TCR, gpio_reg | 0x00000400);
-
- gpio_reg = in32(GPIO1_OR);
- out32(GPIO1_OR, gpio_reg | 0x00000400);
-
- /* Read Version ID */
- cram_id = (volatile u32) in32(CRAM_BANK0_BASE+CRAM_DIDR);
- udelay(100000);
-
- asm volatile(" sync");
- asm volatile(" eieio");
-
- debug("Cram ID: %X ", cram_id);
-
- switch (cram_id) {
- case MICRON_MT45W8MW16BGX_CRAM_ID:
- case MICRON_MT45W8MW16BGX_CRAM_ID2:
- /* supported CRAM vendor/part */
- break;
- case CRAM_DEVID_NOT_SUPPORTED:
- default:
- /* check for DIDR Vendor ID of Micron */
- if ((cram_id & CRAM_DIDR_VENDOR_ID_MASK) ==
- MICRON_DIDR_VENDOR_ID)
- {
- /* supported CRAM vendor */
- break;
- }
- /* this is not CRAM or not supported CRAM vendor/part */
- cram_id = 0;
- /*
- * reset the GPIO registers to the values that were
- * there before this routine
- */
- out32(GPIO0_TCR, gpio_TCR);
- out32(GPIO0_OSRL, gpio_OSRL);
- out32(GPIO0_OR, gpio_OR);
- out32(GPIO0_ISR1L, gpio_ISR1L);
- break;
- }
- }
-
- return cram_id;
-}
-
-static long int cram_init(u32 already_inited)
-{
- volatile u32 tmp_reg;
- u32 cram_wr_val;
-
- if (already_inited == 0) return 0;
-
- /*
- * If CRAM is initialized already, then don't reinitialize it again.
- * In the case of NAND boot and SPI boot, CRAM will already be
- * initialized by the pre-loader
- */
- if (already_inited != 1) {
- /*
- * #o CRAM Card
- * # - CRAMCRE @reg16 = 1; for CRAM to use
- * # - CRAMCRE @reg16 = 0; for CRAM to program
- *
- * # enable CRAM SEL, move from setEPLD.cmd
- * set EPLD0_MUX_CTL.OECRAM = 0
- * set EPLD0_MUX_CTL.CRAMCR = 1
- * set EPLD0_ETHRSTBOOT.SLCRAM = 0
- * #end
- */
-
- /*
- * #1. EBC need to program READY, CLK, ADV for ASync mode
- * # config output
- */
-
- /*
- * # CRAM CLOCK
- * set GPIO0_TCR.G8 = 1
- * set GPIO0_OSRL.G8 = 0
- * set GPIO0_OR.G8 = 0
- */
- tmp_reg = in32(GPIO0_TCR);
- out32(GPIO0_TCR, tmp_reg | 0x00800000);
- tmp_reg = in32(GPIO0_OSRL);
- out32(GPIO0_OSRL, tmp_reg & 0xffffbfff);
- tmp_reg = in32(GPIO0_OR);
- out32(GPIO0_OR, tmp_reg & 0xff7fffff);
-
- /*
- * # CRAM Addreaa Valid
- * set GPIO0_TCR.G10 = 1
- * set GPIO0_OSRL.G10 = 0
- * set GPIO0_OR.G10 = 0
- */
- tmp_reg = in32(GPIO0_TCR);
- out32(GPIO0_TCR, tmp_reg | 0x00200000);
- tmp_reg = in32(GPIO0_OSRL);
- out32(GPIO0_OSRL, tmp_reg & 0xfffffbff);
- tmp_reg = in32(GPIO0_OR);
- out32(GPIO0_OR, tmp_reg & 0xffdfffff);
-
- /*
- * # config input (EBC_WAIT)
- * set GPIO0_ISR1L.G9 = 1
- * set GPIO0_TCR.G9 = 0
- */
- tmp_reg = in32(GPIO0_ISR1L);
- out32(GPIO0_ISR1L, tmp_reg | 0x00001000);
- tmp_reg = in32(GPIO0_TCR);
- out32(GPIO0_TCR, tmp_reg & 0xffbfffff);
-
- /*
- * # config CS4 from GPIO
- * set GPIO0_TCR.G0 = 1
- * set GPIO0_OSRL.G0 = 1
- */
- tmp_reg = in32(GPIO0_TCR);
- out32(GPIO0_TCR, tmp_reg | 0x80000000);
- tmp_reg = in32(GPIO0_OSRL);
- out32(GPIO0_OSRL, tmp_reg | 0x40000000);
-
- /*
- * #2. EBC in Async mode
- * # set EBC0_PB1AP = 0x078f0ec0
- * set EBC0_PB1AP = 0x078f1ec0
- * set EBC0_PB2AP = 0x078f1ec0
- */
- mtebc(pb1ap, 0x078F1EC0);
- mtebc(pb2ap, 0x078F1EC0);
-
- /*
- * #set EBC0_PB1CR = 0x000bc000
- * #enable CS2 for CRAM
- * set EBC0_PB2CR = 0x020bc000
- */
- mtebc(pb1cr, 0x000BC000);
- mtebc(pb2cr, 0x020BC000);
-
- /*
- * #3. set CRAM in Sync mode
- * #exec cm_bcr_write.cmd { 0x701f }
- * #3. set CRAM in Sync mode (full drv strength)
- * exec cm_bcr_write.cmd { 0x701F }
- */
- cram_wr_val = 0x7012; /* CRAM burst setting */
- cram_bcr_write(cram_wr_val);
-
- /*
- * #4. EBC in Sync mode
- * #set EBC0_PB1AP = 0x9f800fc0
- * #set EBC0_PB1AP = 0x900001c0
- * set EBC0_PB2AP = 0x9C0201c0
- * set EBC0_PB2AP = 0x9C0201c0
- */
- mtebc(pb1ap, 0x9C0201C0);
- mtebc(pb2ap, 0x9C0201C0);
-
- /*
- * #5. EBC need to program READY, CLK, ADV for Sync mode
- * # config output
- * set GPIO0_TCR.G8 = 1
- * set GPIO0_OSRL.G8 = 1
- * set GPIO0_TCR.G10 = 1
- * set GPIO0_OSRL.G10 = 1
- */
- tmp_reg = in32(GPIO0_TCR);
- out32(GPIO0_TCR, tmp_reg | 0x00800000);
- tmp_reg = in32(GPIO0_OSRL);
- out32(GPIO0_OSRL, tmp_reg | 0x00004000);
- tmp_reg = in32(GPIO0_TCR);
- out32(GPIO0_TCR, tmp_reg | 0x00200000);
- tmp_reg = in32(GPIO0_OSRL);
- out32(GPIO0_OSRL, tmp_reg | 0x00000400);
-
- /*
- * # config input
- * set GPIO0_ISR1L.G9 = 1
- * set GPIO0_TCR.G9 = 0
- */
- tmp_reg = in32(GPIO0_ISR1L);
- out32(GPIO0_ISR1L, tmp_reg | 0x00001000);
- tmp_reg = in32(GPIO0_TCR);
- out32(GPIO0_TCR, tmp_reg & 0xffbfffff);
-
- /*
- * # config EBC to use RDY
- * set SDR0_ULTRA0.EBCREN = 1
- */
- mfsdr(sdrultra0, tmp_reg);
- mtsdr(sdrultra0, tmp_reg | 0x04000000);
-
- /*
- * set EPLD0_MUX_CTL.OESPR3 = 0
- */
- mtspr(SPRG7, LOAK_CRAM); /* "CRAM" */
- } /* if (already_inited != 1) */
-
- return (64 * 1024 * 1024);
-}
-
-/******
- * return 0 if not PSRAM
- * return 1 if is PSRAM
- ******/
-static int is_psram(u32 addr)
-{
- u32 test_pattern = 0xdeadbeef;
- volatile u32 readback;
-
- if (addr == CFG_SDRAM_BASE) {
- /* This is to temp enable OE for PSRAM */
- out16(EPLD_BASE+EPLD_MUXOE, 0x7f0f);
- udelay(10000);
- }
-
- out32(addr, test_pattern);
- asm volatile(" sync");
- asm volatile(" eieio");
-
- readback = (volatile u32) in32(addr);
- asm volatile(" sync");
- asm volatile(" eieio");
- if (readback == test_pattern) {
- return 1;
- } else {
- return 0;
- }
-}
-
-static long int psram_init(void)
-{
- u32 readback;
- long psramsize = 0;
int i;
+ u32 val;
- /* This is to temp enable OE for PSRAM */
- out16(EPLD_BASE+EPLD_MUXOE, 0x7f0f);
- udelay(10000);
+ /* 1. EBC need to program READY, CLK, ADV for ASync mode */
+ gpio_config(CONFIG_SYS_GPIO_CRAM_CLK, GPIO_OUT, GPIO_SEL, GPIO_OUT_0);
+ gpio_config(CONFIG_SYS_GPIO_CRAM_ADV, GPIO_OUT, GPIO_SEL, GPIO_OUT_0);
+ gpio_config(CONFIG_SYS_GPIO_CRAM_CRE, GPIO_OUT, GPIO_SEL, GPIO_OUT_0);
+ gpio_config(CONFIG_SYS_GPIO_CRAM_WAIT, GPIO_IN, GPIO_SEL, GPIO_OUT_NO_CHG);
- /*
- * PSRAM bank 1: read then write to address 0x00000000
- */
- for (i = 0; i < 100; i++) {
- if (is_psram(CFG_SDRAM_BASE + (i*256)) == 1) {
- readback = PSRAM_PASS;
- } else {
- readback = PSRAM_FAIL;
- break;
- }
- }
- if (readback == PSRAM_PASS) {
- debug("psram_init(bank0): pass\n");
- psramsize = (16 * 1024 * 1024);
- } else {
- debug("psram_init(bank0): fail\n");
- return 0;
- }
+ /* 2. EBC in Async mode */
+ mtebc(PB1AP, 0x078F1EC0);
+ mtebc(PB2AP, 0x078F1EC0);
+ mtebc(PB1CR, 0x000BC000);
+ mtebc(PB2CR, 0x020BC000);
-#if 0
- /*
- * PSRAM bank 1: read then write to address 0x01000000
- */
- for (i = 0; i < 100; i++) {
- if (is_psram((1 << 24) + (i*256)) == 1) {
- readback = PSRAM_PASS;
- } else {
- readback = PSRAM_FAIL;
- break;
- }
- }
- if (readback == PSRAM_PASS) {
- debug("psram_init(bank1): pass\n");
- psramsize = psramsize + (16 * 1024 * 1024);
- }
-#endif
+ /* 3. Set CRAM in Sync mode */
+ cram_bcr_write(0x7012); /* CRAM burst setting */
- mtspr(SPRG7, LOAK_PSRAM); /* "PSRA" - PSRAM */
+ /* 4. EBC in Sync mode */
+ mtebc(PB1AP, 0x9C0201C0);
+ mtebc(PB2AP, 0x9C0201C0);
- return psramsize;
-}
+ /* Set GPIO pins back to alternate function */
+ gpio_config(CONFIG_SYS_GPIO_CRAM_CLK, GPIO_OUT, GPIO_ALT1, GPIO_OUT_NO_CHG);
+ gpio_config(CONFIG_SYS_GPIO_CRAM_ADV, GPIO_OUT, GPIO_ALT1, GPIO_OUT_NO_CHG);
-long int initdram(int board_type)
-{
- long int sram_size;
- u32 cram_inited;
+ /* Config EBC to use RDY */
+ mfsdr(SDR0_ULTRA0, val);
+ mtsdr(SDR0_ULTRA0, val | SDR_ULTRA0_EBCRDYEN);
- /* Determine Attached Memory Expansion Card*/
- cram_inited = is_cram();
- if (cram_inited != 0) { /* CRAM */
- debug("CRAM Expansion Card attached\n");
- sram_size = cram_init(cram_inited);
- } else if (is_psram(CFG_SDRAM_BASE+4) == 1) { /* PSRAM */
- debug("PSRAM Expansion Card attached\n");
- sram_size = psram_init();
- } else { /* no SRAM */
- debug("No Memory Card Attached!!\n");
- sram_size = 0;
- }
+ /* Wait a short while, since for NAND booting this is too fast */
+ for (i=0; i<200000; i++)
+ ;
- return sram_size;
-}
+ gd->ram_size = CONFIG_SYS_MBYTES_RAM << 20;
-int testdram(void)
-{
- return (0);
+ return 0;
}
projects / people / ms / u-boot.git / blobdiff