--- /dev/null
+/*
+ * This is the main board level file for the Redwood AMCC board.
+ *
+ * (C) Copyright 2008
+ * Feng Kan, Applied Micro Circuits Corp., fkan@amcc.com
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include "redwood.h"
+#include <asm/ppc4xx.h>
+#include <asm/processor.h>
+#include <i2c.h>
+#include <asm/io.h>
+
+int compare_to_true(char *str);
+char *remove_l_w_space(char *in_str);
+char *remove_t_w_space(char *in_str);
+int get_console_port(void);
+
+static void early_init_EBC(void);
+static int bootdevice_selected(void);
+static void early_reinit_EBC(int);
+static void early_init_UIC(void);
+
+/*
+ * Define Boot devices
+ */
+#define BOOT_FROM_8BIT_SRAM 0x00
+#define BOOT_FROM_16BIT_SRAM 0x01
+#define BOOT_FROM_32BIT_SRAM 0x02
+#define BOOT_FROM_8BIT_NAND 0x03
+#define BOOT_FROM_16BIT_NOR 0x04
+#define BOOT_DEVICE_UNKNOWN 0xff
+
+/*
+ * EBC Devices Characteristics
+ * Peripheral Bank Access Parameters - EBC_BxAP
+ * Peripheral Bank Configuration Register - EBC_BxCR
+ */
+
+/*
+ * 8 bit width SRAM
+ * BU Value
+ * BxAP : 0x03800000 - 0 00000111 0 00 00 00 00 00 000 0 0 0 0 00000
+ * B0CR : 0xff098000 - BAS = ff0 - 100 11 00 0000000000000
+ * B2CR : 0xe7098000 - BAS = e70 - 100 11 00 0000000000000
+ */
+#define EBC_BXAP_8BIT_SRAM \
+ EBC_BXAP_BME_DISABLED | EBC_BXAP_TWT_ENCODE(7) | \
+ EBC_BXAP_BCE_DISABLE | EBC_BXAP_BCT_2TRANS | \
+ EBC_BXAP_CSN_ENCODE(0) | EBC_BXAP_OEN_ENCODE(0) | \
+ EBC_BXAP_WBN_ENCODE(0) | EBC_BXAP_WBF_ENCODE(0) | \
+ EBC_BXAP_TH_ENCODE(0) | EBC_BXAP_RE_DISABLED | \
+ EBC_BXAP_SOR_DELAYED | EBC_BXAP_BEM_WRITEONLY | \
+ EBC_BXAP_PEN_DISABLED
+
+#define EBC_BXAP_16BIT_SRAM EBC_BXAP_8BIT_SRAM
+#define EBC_BXAP_32BIT_SRAM EBC_BXAP_8BIT_SRAM
+
+/*
+ * NAND flash
+ * BU Value
+ * BxAP : 0x048ff240 - 0 00000111 0 00 00 00 00 00 000 0 0 0 0 00000
+ * B0CR : 0xff09a000 - BAS = ff0 - 100 11 01 0000000000000
+ * B2CR : 0xe709a000 - BAS = e70 - 100 11 01 0000000000000
+*/
+#define EBC_BXAP_NAND \
+ EBC_BXAP_BME_DISABLED | EBC_BXAP_TWT_ENCODE(7) | \
+ EBC_BXAP_BCE_DISABLE | EBC_BXAP_BCT_2TRANS | \
+ EBC_BXAP_CSN_ENCODE(0) | EBC_BXAP_OEN_ENCODE(0) | \
+ EBC_BXAP_WBN_ENCODE(0) | EBC_BXAP_WBF_ENCODE(0) | \
+ EBC_BXAP_TH_ENCODE(0) | EBC_BXAP_RE_DISABLED | \
+ EBC_BXAP_SOR_DELAYED | EBC_BXAP_BEM_WRITEONLY | \
+ EBC_BXAP_PEN_DISABLED
+
+/*
+ * NOR flash
+ * BU Value
+ * BxAP : 0x048ff240 - 0 00000111 0 00 00 00 00 00 000 0 0 0 0 00000
+ * B0CR : 0xff09a000 - BAS = ff0 - 100 11 01 0000000000000
+ * B2CR : 0xe709a000 - BAS = e70 - 100 11 01 0000000000000
+*/
+#define EBC_BXAP_NOR \
+ EBC_BXAP_BME_DISABLED | EBC_BXAP_TWT_ENCODE(7) | \
+ EBC_BXAP_BCE_DISABLE | EBC_BXAP_BCT_2TRANS | \
+ EBC_BXAP_CSN_ENCODE(0) | EBC_BXAP_OEN_ENCODE(0) | \
+ EBC_BXAP_WBN_ENCODE(0) | EBC_BXAP_WBF_ENCODE(0) | \
+ EBC_BXAP_TH_ENCODE(0) | EBC_BXAP_RE_DISABLED | \
+ EBC_BXAP_SOR_DELAYED | EBC_BXAP_BEM_WRITEONLY | \
+ EBC_BXAP_PEN_DISABLED
+
+/*
+ * FPGA
+ * BU value :
+ * B1AP = 0x05895240 - 0 00001011 0 00 10 01 01 01 001 0 0 1 0 00000
+ * B1CR = 0xe201a000 - BAS = e20 - 000 11 01 00000000000000
+ */
+#define EBC_BXAP_FPGA \
+ EBC_BXAP_BME_DISABLED | EBC_BXAP_TWT_ENCODE(11) | \
+ EBC_BXAP_BCE_DISABLE | EBC_BXAP_BCT_2TRANS | \
+ EBC_BXAP_CSN_ENCODE(10) | EBC_BXAP_OEN_ENCODE(1) | \
+ EBC_BXAP_WBN_ENCODE(1) | EBC_BXAP_WBF_ENCODE(1) | \
+ EBC_BXAP_TH_ENCODE(1) | EBC_BXAP_RE_DISABLED | \
+ EBC_BXAP_SOR_DELAYED | EBC_BXAP_BEM_RW | \
+ EBC_BXAP_PEN_DISABLED
+
+#define EBC_BXCR_8BIT_SRAM_CS0 \
+ EBC_BXCR_BAS_ENCODE(0xFFE00000) | EBC_BXCR_BS_1MB | \
+ EBC_BXCR_BU_RW | EBC_BXCR_BW_8BIT
+
+#define EBC_BXCR_32BIT_SRAM_CS0 \
+ EBC_BXCR_BAS_ENCODE(0xFFC00000) | EBC_BXCR_BS_1MB | \
+ EBC_BXCR_BU_RW | EBC_BXCR_BW_32BIT
+
+#define EBC_BXCR_NAND_CS0 \
+ EBC_BXCR_BAS_ENCODE(0xFF000000) | EBC_BXCR_BS_16MB | \
+ EBC_BXCR_BU_RW | EBC_BXCR_BW_8BIT
+
+#define EBC_BXCR_16BIT_SRAM_CS0 \
+ EBC_BXCR_BAS_ENCODE(0xFFE00000) | EBC_BXCR_BS_2MB | \
+ EBC_BXCR_BU_RW | EBC_BXCR_BW_16BIT
+
+#define EBC_BXCR_NOR_CS0 \
+ EBC_BXCR_BAS_ENCODE(0xFF000000) | EBC_BXCR_BS_16MB | \
+ EBC_BXCR_BU_RW | EBC_BXCR_BW_16BIT
+
+#define EBC_BXCR_NOR_CS1 \
+ EBC_BXCR_BAS_ENCODE(0xE0000000) | EBC_BXCR_BS_128MB | \
+ EBC_BXCR_BU_RW | EBC_BXCR_BW_16BIT
+
+#define EBC_BXCR_NAND_CS1 \
+ EBC_BXCR_BAS_ENCODE(0xE0000000) | EBC_BXCR_BS_128MB | \
+ EBC_BXCR_BU_RW | EBC_BXCR_BW_8BIT
+
+#define EBC_BXCR_NAND_CS2 \
+ EBC_BXCR_BAS_ENCODE(0xC0000000) | EBC_BXCR_BS_128MB | \
+ EBC_BXCR_BU_RW | EBC_BXCR_BW_8BIT
+
+#define EBC_BXCR_SRAM_CS2 \
+ EBC_BXCR_BAS_ENCODE(0xC0000000) | EBC_BXCR_BS_4MB | \
+ EBC_BXCR_BU_RW | EBC_BXCR_BW_32BIT
+
+#define EBC_BXCR_LARGE_FLASH_CS2 \
+ EBC_BXCR_BAS_ENCODE(0xE7000000) | EBC_BXCR_BS_16MB | \
+ EBC_BXCR_BU_RW | EBC_BXCR_BW_16BIT
+
+#define EBC_BXCR_FPGA_CS3 \
+ EBC_BXCR_BAS_ENCODE(0xE2000000) | EBC_BXCR_BS_1MB | \
+ EBC_BXCR_BU_RW | EBC_BXCR_BW_16BIT
+
+/*****************************************************************************
+ * UBOOT initiated board specific function calls
+ ****************************************************************************/
+
+int board_early_init_f(void)
+{
+ int computed_boot_device = BOOT_DEVICE_UNKNOWN;
+
+ /*
+ * Initialise EBC
+ */
+ early_init_EBC();
+
+ /*
+ * Determine which boot device was selected
+ */
+ computed_boot_device = bootdevice_selected();
+
+ /*
+ * Reinit EBC based on selected boot device
+ */
+ early_reinit_EBC(computed_boot_device);
+
+ /*
+ * Setup for UIC on 460SX redwood board
+ */
+ early_init_UIC();
+
+ return 0;
+}
+
+int checkboard(void)
+{
+ char buf[64];
+ int i = getenv_f("serial#", buf, sizeof(buf));
+
+ printf("Board: Redwood - AMCC 460SX Reference Board");
+ if (i > 0) {
+ puts(", serial# ");
+ puts(buf);
+ }
+ putc('\n');
+
+ return 0;
+}
+
+static void early_init_EBC(void)
+{
+ /*
+ * Initialize EBC CONFIG -
+ * Keep the Default value, but the bit PDT which has to be set to 1 ?TBC
+ * default value :
+ * 0x07C00000 - 0 0 000 1 1 1 1 1 0000 0 00000 000000000000
+ */
+ mtebc(EBC0_CFG, EBC_CFG_LE_UNLOCK |
+ EBC_CFG_PTD_ENABLE |
+ EBC_CFG_RTC_16PERCLK |
+ EBC_CFG_ATC_PREVIOUS |
+ EBC_CFG_DTC_PREVIOUS |
+ EBC_CFG_CTC_PREVIOUS |
+ EBC_CFG_OEO_PREVIOUS |
+ EBC_CFG_EMC_DEFAULT | EBC_CFG_PME_DISABLE | EBC_CFG_PR_16);
+
+ /*
+ * PART 1 : Initialize EBC Bank 3
+ * ==============================
+ * Bank1 is always associated to the EPLD.
+ * It has to be initialized prior to other banks settings computation
+ * since some board registers values may be needed to determine the
+ * boot type
+ */
+ mtebc(PB1AP, EBC_BXAP_FPGA);
+ mtebc(PB1CR, EBC_BXCR_FPGA_CS3);
+
+}
+
+static int bootdevice_selected(void)
+{
+ unsigned long sdr0_pinstp;
+ unsigned long bootstrap_settings;
+ int computed_boot_device = BOOT_DEVICE_UNKNOWN;
+
+ /*
+ * Determine which boot device was selected
+ * =================================================
+ *
+ * Read Pin Strap Register in PPC460SX
+ * Result can either be :
+ * - Boot strap = boot from EBC 8bits => Small Flash
+ * - Boot strap = boot from PCI
+ * - Boot strap = IIC
+ * In case of boot from IIC, read Serial Device Strap Register1
+ *
+ * Result can either be :
+ * - Boot from EBC - EBC Bus Width = 8bits => Small Flash
+ * - Boot from EBC - EBC Bus Width = 16bits => Large Flash or SRAM
+ * - Boot from PCI
+ */
+
+ /* Read Pin Strap Register in PPC460SX */
+ mfsdr(SDR0_PINSTP, sdr0_pinstp);
+ bootstrap_settings = sdr0_pinstp & SDR0_PSTRP0_BOOTSTRAP_MASK;
+
+ switch (bootstrap_settings) {
+ case SDR0_PSTRP0_BOOTSTRAP_SETTINGS0:
+ /*
+ * Boot from SRAM, 8bit width
+ */
+ computed_boot_device = BOOT_FROM_8BIT_SRAM;
+ break;
+ case SDR0_PSTRP0_BOOTSTRAP_SETTINGS1:
+ /*
+ * Boot from SRAM, 32bit width
+ */
+ computed_boot_device = BOOT_FROM_32BIT_SRAM;
+ break;
+ case SDR0_PSTRP0_BOOTSTRAP_SETTINGS2:
+ /*
+ * Boot from NAND, 8bit width
+ */
+ computed_boot_device = BOOT_FROM_8BIT_NAND;
+ break;
+ case SDR0_PSTRP0_BOOTSTRAP_SETTINGS4:
+ /*
+ * Boot from SRAM, 16bit width
+ * Boot setting in IIC EEPROM 0x50
+ */
+ computed_boot_device = BOOT_FROM_16BIT_SRAM;
+ break;
+ case SDR0_PSTRP0_BOOTSTRAP_SETTINGS5:
+ /*
+ * Boot from NOR, 16bit width
+ * Boot setting in IIC EEPROM 0x54
+ */
+ computed_boot_device = BOOT_FROM_16BIT_NOR;
+ break;
+ default:
+ /* should not be */
+ computed_boot_device = BOOT_DEVICE_UNKNOWN;
+ break;
+ }
+
+ return computed_boot_device;
+}
+
+static void early_reinit_EBC(int computed_boot_device)
+{
+ /*
+ * Compute EBC settings depending on selected boot device
+ * ======================================================
+ *
+ * Resulting EBC init will be among following configurations :
+ *
+ * - Boot from EBC 8bits => boot from Small Flash selected
+ * EBC-CS0 = Small Flash
+ * EBC-CS2 = Large Flash and SRAM
+ *
+ * - Boot from EBC 16bits => boot from Large Flash or SRAM
+ * EBC-CS0 = Large Flash or SRAM
+ * EBC-CS2 = Small Flash
+ *
+ * - Boot from PCI
+ * EBC-CS0 = not initialized to avoid address contention
+ * EBC-CS2 = same as boot from Small Flash selected
+ */
+
+ unsigned long ebc0_cs0_bxap_value = 0, ebc0_cs0_bxcr_value = 0;
+ unsigned long ebc0_cs1_bxap_value = 0, ebc0_cs1_bxcr_value = 0;
+ unsigned long ebc0_cs2_bxap_value = 0, ebc0_cs2_bxcr_value = 0;
+
+ switch (computed_boot_device) {
+ /*-------------------------------------------------------------------*/
+ case BOOT_FROM_8BIT_SRAM:
+ /*-------------------------------------------------------------------*/
+ ebc0_cs0_bxap_value = EBC_BXAP_8BIT_SRAM;
+ ebc0_cs0_bxcr_value = EBC_BXCR_8BIT_SRAM_CS0;
+ ebc0_cs1_bxap_value = EBC_BXAP_NOR;
+ ebc0_cs1_bxcr_value = EBC_BXCR_NOR_CS1;
+ ebc0_cs2_bxap_value = EBC_BXAP_NAND;
+ ebc0_cs2_bxcr_value = EBC_BXCR_NAND_CS2;
+ break;
+
+ /*-------------------------------------------------------------------*/
+ case BOOT_FROM_16BIT_SRAM:
+ /*-------------------------------------------------------------------*/
+ ebc0_cs0_bxap_value = EBC_BXAP_16BIT_SRAM;
+ ebc0_cs0_bxcr_value = EBC_BXCR_16BIT_SRAM_CS0;
+ ebc0_cs1_bxap_value = EBC_BXAP_NOR;
+ ebc0_cs1_bxcr_value = EBC_BXCR_NOR_CS1;
+ ebc0_cs2_bxap_value = EBC_BXAP_NAND;
+ ebc0_cs2_bxcr_value = EBC_BXCR_NAND_CS2;
+ break;
+
+ /*-------------------------------------------------------------------*/
+ case BOOT_FROM_32BIT_SRAM:
+ /*-------------------------------------------------------------------*/
+ ebc0_cs0_bxap_value = EBC_BXAP_32BIT_SRAM;
+ ebc0_cs0_bxcr_value = EBC_BXCR_32BIT_SRAM_CS0;
+ ebc0_cs1_bxap_value = EBC_BXAP_NOR;
+ ebc0_cs1_bxcr_value = EBC_BXCR_NOR_CS1;
+ ebc0_cs2_bxap_value = EBC_BXAP_NAND;
+ ebc0_cs2_bxcr_value = EBC_BXCR_NAND_CS2;
+ break;
+
+ /*-------------------------------------------------------------------*/
+ case BOOT_FROM_16BIT_NOR:
+ /*-------------------------------------------------------------------*/
+ ebc0_cs0_bxap_value = EBC_BXAP_NOR;
+ ebc0_cs0_bxcr_value = EBC_BXCR_NOR_CS0;
+ ebc0_cs1_bxap_value = EBC_BXAP_NAND;
+ ebc0_cs1_bxcr_value = EBC_BXCR_NAND_CS1;
+ ebc0_cs2_bxap_value = EBC_BXAP_32BIT_SRAM;
+ ebc0_cs2_bxcr_value = EBC_BXCR_SRAM_CS2;
+ break;
+
+ /*-------------------------------------------------------------------*/
+ case BOOT_FROM_8BIT_NAND:
+ /*-------------------------------------------------------------------*/
+ ebc0_cs0_bxap_value = EBC_BXAP_NAND;
+ ebc0_cs0_bxcr_value = EBC_BXCR_NAND_CS0;
+ ebc0_cs1_bxap_value = EBC_BXAP_NOR;
+ ebc0_cs1_bxcr_value = EBC_BXCR_NOR_CS1;
+ ebc0_cs2_bxap_value = EBC_BXAP_32BIT_SRAM;
+ ebc0_cs2_bxcr_value = EBC_BXCR_SRAM_CS2;
+ break;
+
+ /*-------------------------------------------------------------------*/
+ default:
+ /*-------------------------------------------------------------------*/
+ /* BOOT_DEVICE_UNKNOWN */
+ break;
+ }
+
+ mtebc(PB0AP, ebc0_cs0_bxap_value);
+ mtebc(PB0CR, ebc0_cs0_bxcr_value);
+ mtebc(PB1AP, ebc0_cs1_bxap_value);
+ mtebc(PB1CR, ebc0_cs1_bxcr_value);
+ mtebc(PB2AP, ebc0_cs2_bxap_value);
+ mtebc(PB2CR, ebc0_cs2_bxcr_value);
+}
+
+static void early_init_UIC(void)
+{
+ /*
+ * Initialise UIC registers. Clear all interrupts. Disable all
+ * interrupts.
+ * Set critical interrupt values. Set interrupt polarities. Set
+ * interrupt trigger levels. Make bit 0 High priority. Clear all
+ * interrupts again.
+ */
+ mtdcr(UIC3SR, 0xffffffff); /* Clear all interrupts */
+ mtdcr(UIC3ER, 0x00000000); /* disable all interrupts */
+ mtdcr(UIC3CR, 0x00000000); /* Set Critical / Non Critical
+ * interrupts */
+ mtdcr(UIC3PR, 0xffffffff); /* Set Interrupt Polarities */
+ mtdcr(UIC3TR, 0x001fffff); /* Set Interrupt Trigger Levels */
+ mtdcr(UIC3VR, 0x00000000); /* int31 highest, base=0x000 */
+ mtdcr(UIC3SR, 0xffffffff); /* clear all interrupts */
+
+ mtdcr(UIC2SR, 0xffffffff); /* Clear all interrupts */
+ mtdcr(UIC2ER, 0x00000000); /* disable all interrupts */
+ mtdcr(UIC2CR, 0x00000000); /* Set Critical / Non Critical
+ * interrupts */
+ mtdcr(UIC2PR, 0xebebebff); /* Set Interrupt Polarities */
+ mtdcr(UIC2TR, 0x74747400); /* Set Interrupt Trigger Levels */
+ mtdcr(UIC2VR, 0x00000000); /* int31 highest, base=0x000 */
+ mtdcr(UIC2SR, 0xffffffff); /* clear all interrupts */
+
+ mtdcr(UIC1SR, 0xffffffff); /* Clear all interrupts */
+ mtdcr(UIC1ER, 0x00000000); /* disable all interrupts */
+ mtdcr(UIC1CR, 0x00000000); /* Set Critical / Non Critical
+ * interrupts */
+ mtdcr(UIC1PR, 0xffffffff); /* Set Interrupt Polarities */
+ mtdcr(UIC1TR, 0x001fc0ff); /* Set Interrupt Trigger Levels */
+ mtdcr(UIC1VR, 0x00000000); /* int31 highest, base=0x000 */
+ mtdcr(UIC1SR, 0xffffffff); /* clear all interrupts */
+
+ mtdcr(UIC0SR, 0xffffffff); /* Clear all interrupts */
+ mtdcr(UIC0ER, 0x00000000); /* disable all interrupts excepted
+ * cascade to be checked */
+ mtdcr(UIC0CR, 0x00104001); /* Set Critical / Non Critical
+ * interrupts */
+ mtdcr(UIC0PR, 0xffffffff); /* Set Interrupt Polarities */
+ mtdcr(UIC0TR, 0x000f003c); /* Set Interrupt Trigger Levels */
+ mtdcr(UIC0VR, 0x00000000); /* int31 highest, base=0x000 */
+ mtdcr(UIC0SR, 0xffffffff); /* clear all interrupts */
+
+}
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