Wolfgang Denk wd-at-denx.de |u-boot-users| wrote:
In message 27598-21055@sneakemail.com you wrote:
I've made a patch relative the current CVS (at sourceforge) that adds support for a Xilinx SystemACE chip directly attached to the PPC. (Well, conceivably any CPU type.)
I've made the bundle of diffs and new files available for ftp download here:
It doesn't work this way. Please you submit your patches to the list (or to me).
This is the systemace.h and systemace.c files that goes with the earlier posted systemace patch. These files go in include/systemace.h and common/cmd_ace.c
-------------------------- #ifndef __systemace_H #define __systemace_H /* * Copyright (c) 2004 Picture Elements, Inc. * Stephen Williams (steve@picturel.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 */ #ident "$Id:$"
#ifdef CONFIG_SYSTEMACE
# include <part.h>
block_dev_desc_t * systemace_get_dev(int dev);
#endif #endif --------------------------------- /* * Copyright (c) 2004 Picture Elements, Inc. * Stephen Williams (XXXXXXXXXXXXXXXX) * * 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 */ #ident "$Id:$"
/* * The Xilinx SystemACE chip support is activated by defining * CONFIG_SYSTEMACE to turn on support, and CFG_SYSTEMACE_BASE * to set the base address of the device. This code currently * assumes that the chip is connected via a byte-wide bus. * * The CONFIG_SYSTEMACE also adds to fat support the device class * "ace" that allows the user to execute "fatls ace 0" and the * like. This works by making the systemace_get_dev function * available to cmd_fat.c:get_dev and filling in a block device * description that has all the bits needed for FAT support to * read sectors. */
# include <common.h> # include <command.h> # include <systemace.h> # include <part.h> # include <asm/io.h>
#ifdef CONFIG_SYSTEMACE
/* * The ace_readw and writew functions read/write 16bit words, but the * offset value is the BYTE offset as most used in the Xilinx * datasheet for the SystemACE chip. The CFG_SYSTEMACE_BASE is defined * to be the base address for the chip, usually in the local * peripheral bus. */ static unsigned ace_readw(unsigned offset) { return readw(CFG_SYSTEMACE_BASE+offset); }
static unsigned ace_writew(unsigned val, unsigned offset) { writew(val, CFG_SYSTEMACE_BASE+offset); }
/* */
static unsigned long systemace_read(int dev, unsigned long start, unsigned long blkcnt, unsigned long *buffer);
static block_dev_desc_t systemace_dev = {0};
static int get_cf_lock(void) { int retry = 10;
/* CONTROLREG = LOCKREG */ ace_writew(0x0002, 0x18);
/* Wait for MPULOCK in STATUSREG[15:0] */ while (! (ace_readw(0x04) & 0x0002)) {
if (retry < 0) return -1;
udelay(100000); retry -= 1; }
return 0; }
static void release_cf_lock(void) { /* CONTROLREG = none */ ace_writew(0x0000, 0x18); }
block_dev_desc_t * systemace_get_dev(int dev) { /* The first time through this, the systemace_dev object is not yet initialized. In that case, fill it in. */ if (systemace_dev.blksz == 0) { systemace_dev.if_type = IF_TYPE_UNKNOWN; systemace_dev.part_type = PART_TYPE_UNKNOWN; systemace_dev.type = DEV_TYPE_HARDDISK; systemace_dev.blksz = 512; systemace_dev.removable = 1; systemace_dev.block_read = systemace_read; }
return &systemace_dev; }
/* * This function is called (by dereferencing the block_read pointer in * the dev_desc) to read blocks of data. The return value is the * number of blocks read. A zero return indicates an error. */ static unsigned long systemace_read(int dev, unsigned long start, unsigned long blkcnt, unsigned long *buffer) { unsigned val; int retry; unsigned char*dp = (unsigned char*)buffer;
if (get_cf_lock() < 0) { unsigned status = ace_readw(0x04);
/* If CFDETECT is false, card is missing. */ if (! (status&0x0010)) { printf("** CompactFlash card not present. **\n"); return 0; }
printf("**** ACE locked away from me (STATUSREG=%04x)\n", status); return 0; }
retry = 2000; for (;;) { unsigned val = ace_readw(0x04);
/* If CFDETECT is false, card is missing. */ if (! (val & 0x0010)) { printf("**** ACE CompactFlash not found.\n"); release_cf_lock(); return 0; }
/* If RDYFORCMD, then we are ready to go. */ if (val & 0x0100) break;
if (retry < 0) { printf("**** SystemACE not ready.\n"); release_cf_lock(); return 0; }
udelay(1000); retry -= 1; }
/* Write LBA block address */ ace_writew(start & 0xffff, 0x10); start >>= 16; ace_writew(start & 0xff, 0x12);
/* Write sector count | ReadMemCardData. */ ace_writew(blkcnt | 0x0300, 0x14);
/* CONTROLREG = CFGRESET|LOCKREQ */ ace_writew(0x0082, 0x18);
retry = blkcnt * 16; while (retry > 0) { int idx;
/* Wait for buffer to become ready. */ while (! (ace_readw(0x04) & 0x0020)) { udelay(1000); }
/* Read 16 words of 2bytes from the sector buffer. */ for (idx = 0 ; idx < 16 ; idx += 1) { unsigned short val = ace_readw(0x40); *dp++ = val & 0xff; *dp++ = (val>>8) & 0xff; }
retry -= 1; }
release_cf_lock();
return blkcnt; }
#endif
/* * $Log: $ */