diff options
Diffstat (limited to 'board/jse/jse.c')
| -rw-r--r-- | board/jse/jse.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/board/jse/jse.c b/board/jse/jse.c new file mode 100644 index 0000000..9290814 --- /dev/null +++ b/board/jse/jse.c @@ -0,0 +1,160 @@ +/* + * Copyright (c) 2004 Picture Elements, Inc. + * Stephen Williams (steve@icarus.com) + * + * This source code is free software; you can redistribute it + * and/or modify it in source code form 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 <asm/io.h> +# include "jse_priv.h" + +/* + * This function is run very early, out of flash, and before devices are + * initialized. It is called by lib_ppc/board.c:board_init_f by virtue + * of being in the init_sequence array. + * + * The SDRAM has been initialized already -- start.S:start called + * init.S:init_sdram early on -- but it is not yet being used for + * anything, not even stack. So be careful. + */ +int board_early_init_f (void) +{ + /*-------------------------------------------------------------------------+ + | Interrupt controller setup for the JSE board. + | Note: IRQ 0-15 405GP internally generated; active high; level sensitive + | IRQ 16 405GP internally generated; active low; level sensitive + | IRQ 17-24 RESERVED/UNUSED + | IRQ 25 (EXT IRQ 0) PCI SLOT 0; active low; level sensitive + | IRQ 26 (EXT IRQ 1) PCI SLOT 1; active low; level sensitive + | IRQ 27 (EXT IRQ 2) JP2C CHIP ; active low; level sensitive + | IRQ 28 (EXT IRQ 3) PCI bridge; active low; level sensitive + | IRQ 29 (EXT IRQ 4) SystemACE IRQ; active high + | IRQ 30 (EXT IRQ 5) SystemACE BRdy (unused) + | IRQ 31 (EXT IRQ 6) (unused) + +-------------------------------------------------------------------------*/ + mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */ + mtdcr (uicer, 0x00000000); /* disable all ints */ + mtdcr (uiccr, 0x00000000); /* set all to be non-critical */ + mtdcr (uicpr, 0xFFFFFF87); /* set int polarities */ + mtdcr (uictr, 0x10000000); /* set int trigger levels */ + mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */ + + /* Configure the interface to the SystemACE MCU port. + The SystemACE is fast, but there is no reason to have + excessivly tight timings. So the settings are slightly + generous. */ + + /* EBC0_B1AP: BME=1, TWT=2, CSN=0, OEN=1, + WBN=0, WBF=1, TH=0, RE=0, SOR=0, BEM=0, PEN=0 */ + mtdcr (ebccfga, pb1ap); + mtdcr (ebccfgd, 0x01011000); + + /* EBC0_B1CR: BAS=x, BS=0(1MB), BU=3(R/W), BW=0(8bits) */ + mtdcr (ebccfga, pb1cr); + mtdcr (ebccfgd, CFG_SYSTEMACE_BASE | 0x00018000); + + /* Enable the /PerWE output as /PerWE, instead of /PCIINT. */ + /* CPC0_CR1 |= PCIPW */ + mtdcr (0xb2, mfdcr (0xb2) | 0x00004000); + + return 0; +} + +#ifdef CONFIG_BOARD_PRE_INIT +int board_pre_init (void) +{ + return board_early_init_f (); +} + +#endif + +/* + * This function is also called by lib_ppc/board.c:board_init_f (it is + * also in the init_sequence array) but later. Many more things are + * configured, but we are still running from flash. + */ +int checkboard (void) +{ + unsigned vers, status; + + /* check that the SystemACE chip is alive. */ + printf ("ACE: "); + vers = readw (CFG_SYSTEMACE_BASE + 0x16); + printf ("SystemACE %u.%u (build %u)", + (vers >> 12) & 0x0f, (vers >> 8) & 0x0f, vers & 0xff); + + status = readl (CFG_SYSTEMACE_BASE + 0x04); +#ifdef DEBUG + printf (" STATUS=0x%08x", status); +#endif + /* If the flash card is present and there is an initial error, + then force a restart of the program. */ + if (status & 0x00000010) { + printf (" CFDETECT"); + + if (status & 0x04) { + /* CONTROLREG = CFGPROG */ + writew (0x1000, CFG_SYSTEMACE_BASE + 0x18); + udelay (500); + /* CONTROLREG = CFGRESET */ + writew (0x0080, CFG_SYSTEMACE_BASE + 0x18); + udelay (500); + writew (0x0000, CFG_SYSTEMACE_BASE + 0x18); + /* CONTROLREG = CFGSTART */ + writew (0x0020, CFG_SYSTEMACE_BASE + 0x18); + + status = readl (CFG_SYSTEMACE_BASE + 0x04); + } + } + + /* Wait for the SystemACE to program its chain of devices. */ + while ((status & 0x84) == 0x00) { + udelay (500); + status = readl (CFG_SYSTEMACE_BASE + 0x04); + } + + if (status & 0x04) + printf (" CFG-ERROR"); + if (status & 0x80) + printf (" CFGDONE"); + + printf ("\n"); + + /* Force /RTS to active. The board it not wired quite + correctly to use cts/rtc flow control, so just force the + /RST active and forget about it. */ + writeb (readb (0xef600404) | 0x03, 0xef600404); + + printf ("JSE: ready\n"); + + return 0; +} + +/* **** No more functions called by board_init_f. **** */ + +/* + * This function is called by lib_ppc/board.c:board_init_r. At this + * point, basic setup is done, U-Boot has been moved into SDRAM and + * PCI has been set up. From here we done late setup. + */ +int misc_init_r (void) +{ + host_bridge_init (); + return 0; +} |