/* * Copyright (C) 2002 Scott McNutt * * 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 #include #include #define BOOT_SMALL_FLASH 32 /* 00100000 */ #define FLASH_ONBD_N 2 /* 00000010 */ #define FLASH_SRAM_SEL 1 /* 00000001 */ DECLARE_GLOBAL_DATA_PTR; long int fixed_sdram(void); int board_early_init_f(void) { uint reg; unsigned char *fpga_base = (unsigned char *)CFG_FPGA_BASE; unsigned char status; /*-------------------------------------------------------------------- * Setup the external bus controller/chip selects *-------------------------------------------------------------------*/ mtdcr(ebccfga, xbcfg); reg = mfdcr(ebccfgd); mtdcr(ebccfgd, reg | 0x04000000); /* Set ATC */ mtebc(pb1ap, 0x02815480); /* NVRAM/RTC */ mtebc(pb1cr, 0x48018000); /* BA=0x480 1MB R/W 8-bit */ mtebc(pb7ap, 0x01015280); /* FPGA registers */ mtebc(pb7cr, 0x48318000); /* BA=0x483 1MB R/W 8-bit */ /* read FPGA_REG0 and set the bus controller */ status = *fpga_base; if ((status & BOOT_SMALL_FLASH) && !(status & FLASH_ONBD_N)) { mtebc(pb0ap, 0x9b015480); /* FLASH/SRAM */ mtebc(pb0cr, 0xfff18000); /* BAS=0xfff 1MB R/W 8-bit */ mtebc(pb2ap, 0x9b015480); /* 4MB FLASH */ mtebc(pb2cr, 0xff858000); /* BAS=0xff8 4MB R/W 8-bit */ } else { mtebc(pb0ap, 0x9b015480); /* 4MB FLASH */ mtebc(pb0cr, 0xffc58000); /* BAS=0xffc 4MB R/W 8-bit */ /* set CS2 if FLASH_ONBD_N == 0 */ if (!(status & FLASH_ONBD_N)) { mtebc(pb2ap, 0x9b015480); /* FLASH/SRAM */ mtebc(pb2cr, 0xff818000); /* BAS=0xff8 4MB R/W 8-bit */ } } /*-------------------------------------------------------------------- * Setup the interrupt controller polarities, triggers, etc. *-------------------------------------------------------------------*/ mtdcr(uic0sr, 0xffffffff); /* clear all */ mtdcr(uic0er, 0x00000000); /* disable all */ mtdcr(uic0cr, 0x00000009); /* SMI & UIC1 crit are critical */ mtdcr(uic0pr, 0xfffffe13); /* per ref-board manual */ mtdcr(uic0tr, 0x01c00008); /* per ref-board manual */ mtdcr(uic0vr, 0x00000001); /* int31 highest, base=0x000 */ mtdcr(uic0sr, 0xffffffff); /* clear all */ mtdcr(uic1sr, 0xffffffff); /* clear all */ mtdcr(uic1er, 0x00000000); /* disable all */ mtdcr(uic1cr, 0x00000000); /* all non-critical */ mtdcr(uic1pr, 0xffffe0ff); /* per ref-board manual */ mtdcr(uic1tr, 0x00ffc000); /* per ref-board manual */ mtdcr(uic1vr, 0x00000001); /* int31 highest, base=0x000 */ mtdcr(uic1sr, 0xffffffff); /* clear all */ return 0; } int checkboard(void) { char *s = getenv("serial#"); printf("Board: Ebony - AMCC PPC440GP Evaluation Board"); if (s != NULL) { puts(", serial# "); puts(s); } putc('\n'); return (0); } long int initdram(int board_type) { long dram_size = 0; #if defined(CONFIG_SPD_EEPROM) dram_size = spd_sdram(); #else dram_size = fixed_sdram(); #endif return dram_size; } #if defined(CFG_DRAM_TEST) int testdram(void) { uint *pstart = (uint *) 0x00000000; uint *pend = (uint *) 0x08000000; uint *p; for (p = pstart; p < pend; p++) *p = 0xaaaaaaaa; for (p = pstart; p < pend; p++) { if (*p != 0xaaaaaaaa) { printf("SDRAM test fails at: %08x\n", (uint) p); return 1; } } for (p = pstart; p < pend; p++) *p = 0x55555555; for (p = pstart; p < pend; p++) { if (*p != 0x55555555) { printf("SDRAM test fails at: %08x\n", (uint) p); return 1; } } return 0; } #endif #if !defined(CONFIG_SPD_EEPROM) /************************************************************************* * fixed sdram init -- doesn't use serial presence detect. * * Assumes: 128 MB, non-ECC, non-registered * PLB @ 133 MHz * ************************************************************************/ long int fixed_sdram(void) { uint reg; /*-------------------------------------------------------------------- * Setup some default *------------------------------------------------------------------*/ mtsdram(mem_uabba, 0x00000000); /* ubba=0 (default) */ mtsdram(mem_slio, 0x00000000); /* rdre=0 wrre=0 rarw=0 */ mtsdram(mem_devopt, 0x00000000); /* dll=0 ds=0 (normal) */ mtsdram(mem_wddctr, 0x00000000); /* wrcp=0 dcd=0 */ mtsdram(mem_clktr, 0x40000000); /* clkp=1 (90 deg wr) dcdt=0 */ /*-------------------------------------------------------------------- * Setup for board-specific specific mem *------------------------------------------------------------------*/ /* * Following for CAS Latency = 2.5 @ 133 MHz PLB */ mtsdram(mem_b0cr, 0x000a4001); /* SDBA=0x000 128MB, Mode 3, enabled */ mtsdram(mem_tr0, 0x410a4012); /* WR=2 WD=1 CL=2.5 PA=3 CP=4 LD=2 */ /* RA=10 RD=3 */ mtsdram(mem_tr1, 0x8080082f); /* SS=T2 SL=STAGE 3 CD=1 CT=0x02f */ mtsdram(mem_rtr, 0x08200000); /* Rate 15.625 ns @ 133 MHz PLB */ mtsdram(mem_cfg1, 0x00000000); /* Self-refresh exit, disable PM */ udelay(400); /* Delay 200 usecs (min) */ /*-------------------------------------------------------------------- * Enable the controller, then wait for DCEN to complete *------------------------------------------------------------------*/ mtsdram(mem_cfg0, 0x86000000); /* DCEN=1, PMUD=1, 64-bit */ for (;;) { mfsdram(mem_mcsts, reg); if (reg & 0x80000000) break; } return (128 * 1024 * 1024); /* 128 MB */ } #endif /* !defined(CONFIG_SPD_EEPROM) */ /************************************************************************* * pci_pre_init * * This routine is called just prior to registering the hose and gives * the board the opportunity to check things. Returning a value of zero * indicates that things are bad & PCI initialization should be aborted. * * Different boards may wish to customize the pci controller structure * (add regions, override default access routines, etc) or perform * certain pre-initialization actions. * ************************************************************************/ #if defined(CONFIG_PCI) int pci_pre_init(struct pci_controller *hose) { unsigned long strap; /*--------------------------------------------------------------------------+ * The ebony board is always configured as the host & requires the * PCI arbiter to be enabled. *--------------------------------------------------------------------------*/ strap = mfdcr(cpc0_strp1); if ((strap & 0x00100000) == 0) { printf("PCI: CPC0_STRP1[PAE] not set.\n"); return 0; } return 1; } #endif /* defined(CONFIG_PCI) */ /************************************************************************* * pci_target_init * * The bootstrap configuration provides default settings for the pci * inbound map (PIM). But the bootstrap config choices are limited and * may not be sufficient for a given board. * ************************************************************************/ #if defined(CONFIG_PCI) && defined(CFG_PCI_TARGET_INIT) void pci_target_init(struct pci_controller *hose) { /*--------------------------------------------------------------------------+ * Disable everything *--------------------------------------------------------------------------*/ out32r(PCIX0_PIM0SA, 0); /* disable */ out32r(PCIX0_PIM1SA, 0); /* disable */ out32r(PCIX0_PIM2SA, 0); /* disable */ out32r(PCIX0_EROMBA, 0); /* disable expansion rom */ /*--------------------------------------------------------------------------+ * Map all of SDRAM to PCI address 0x0000_0000. Note that the 440 strapping * options to not support sizes such as 128/256 MB. *--------------------------------------------------------------------------*/ out32r(PCIX0_PIM0LAL, CFG_SDRAM_BASE); out32r(PCIX0_PIM0LAH, 0); out32r(PCIX0_PIM0SA, ~(gd->ram_size - 1) | 1); out32r(PCIX0_BAR0, 0); /*--------------------------------------------------------------------------+ * Program the board's subsystem id/vendor id *--------------------------------------------------------------------------*/ out16r(PCIX0_SBSYSVID, CFG_PCI_SUBSYS_VENDORID); out16r(PCIX0_SBSYSID, CFG_PCI_SUBSYS_DEVICEID); out16r(PCIX0_CMD, in16r(PCIX0_CMD) | PCI_COMMAND_MEMORY); } #endif /* defined(CONFIG_PCI) && defined(CFG_PCI_TARGET_INIT) */ /************************************************************************* * is_pci_host * * This routine is called to determine if a pci scan should be * performed. With various hardware environments (especially cPCI and * PPMC) it's insufficient to depend on the state of the arbiter enable * bit in the strap register, or generic host/adapter assumptions. * * Rather than hard-code a bad assumption in the general 440 code, the * 440 pci code requires the board to decide at runtime. * * Return 0 for adapter mode, non-zero for host (monarch) mode. * * ************************************************************************/ #if defined(CONFIG_PCI) int is_pci_host(struct pci_controller *hose) { /* The ebony board is always configured as host. */ return (1); } #endif /* defined(CONFIG_PCI) */