/* * This is the main board level file for the Redwood AMCC board. * * (C) Copyright 2008 * Feng Kan, Applied Micro Circuits Corp., fkan@amcc.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 "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 */ }