* Cleanup compiler warnings * Fix problem with side effects in macros in include/usb.h * Patch by David Benson, 13 Nov 2003: bug 841358 - fix TFTP download size limit * Fixing bug 850768: improper flush_cache() in load_serial() * Fixing bug 834943: MPC8540 - missing volatile declarations * Patch by Stephen Williams, 09 Feb 2004: Add support for Xilinx SystemACE chip: - New files common/cmd_ace.c and include/systemace.h - Hook systemace support into cmd_fat and the partition manager * Patch by Travis Sawyer, 09 Feb 2004: Add bi_opbfreq & bi_iic_fast to 440GX bd_info as needed for Linuxmaster
wdenk
21 years ago
parent
3c74e32a98
commit
3f85ce2785
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/*
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* Copyright (c) 2004 Picture Elements, Inc. |
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* Stephen Williams (XXXXXXXXXXXXXXXX) |
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* |
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* This source code is free software; you can redistribute it |
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* and/or modify it in source code form under the terms of the GNU |
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* General Public License as published by the Free Software |
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* Foundation; either version 2 of the License, or (at your option) |
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* any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
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*/ |
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#ident "$Id:$" |
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/*
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* The Xilinx SystemACE chip support is activated by defining |
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* CONFIG_SYSTEMACE to turn on support, and CFG_SYSTEMACE_BASE |
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* to set the base address of the device. This code currently |
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* assumes that the chip is connected via a byte-wide bus. |
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* |
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* The CONFIG_SYSTEMACE also adds to fat support the device class |
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* "ace" that allows the user to execute "fatls ace 0" and the |
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* like. This works by making the systemace_get_dev function |
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* available to cmd_fat.c:get_dev and filling in a block device |
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* description that has all the bits needed for FAT support to |
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* read sectors. |
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*/ |
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# include <common.h> |
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# include <command.h> |
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# include <systemace.h> |
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# include <part.h> |
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# include <asm/io.h> |
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#ifdef CONFIG_SYSTEMACE |
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/*
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* The ace_readw and writew functions read/write 16bit words, but the |
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* offset value is the BYTE offset as most used in the Xilinx |
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* datasheet for the SystemACE chip. The CFG_SYSTEMACE_BASE is defined |
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* to be the base address for the chip, usually in the local |
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* peripheral bus. |
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*/ |
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static unsigned ace_readw(unsigned offset) |
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{ |
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return readw(CFG_SYSTEMACE_BASE+offset); |
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} |
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static unsigned ace_writew(unsigned val, unsigned offset) |
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{ |
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writew(val, CFG_SYSTEMACE_BASE+offset); |
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} |
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/* */ |
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static unsigned long systemace_read(int dev, |
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unsigned long start, |
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unsigned long blkcnt, |
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unsigned long *buffer); |
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static block_dev_desc_t systemace_dev = {0}; |
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static int get_cf_lock(void) |
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{ |
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int retry = 10; |
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/* CONTROLREG = LOCKREG */ |
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ace_writew(0x0002, 0x18); |
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/* Wait for MPULOCK in STATUSREG[15:0] */ |
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while (! (ace_readw(0x04) & 0x0002)) { |
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if (retry < 0) |
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return -1; |
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udelay(100000); |
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retry -= 1; |
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} |
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return 0; |
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} |
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static void release_cf_lock(void) |
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{ |
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/* CONTROLREG = none */ |
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ace_writew(0x0000, 0x18); |
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} |
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block_dev_desc_t * systemace_get_dev(int dev) |
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{ |
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/* The first time through this, the systemace_dev object is
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not yet initialized. In that case, fill it in. */ |
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if (systemace_dev.blksz == 0) { |
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systemace_dev.if_type = IF_TYPE_UNKNOWN; |
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systemace_dev.part_type = PART_TYPE_UNKNOWN; |
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systemace_dev.type = DEV_TYPE_HARDDISK; |
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systemace_dev.blksz = 512; |
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systemace_dev.removable = 1; |
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systemace_dev.block_read = systemace_read; |
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} |
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return &systemace_dev; |
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} |
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/*
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* This function is called (by dereferencing the block_read pointer in |
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* the dev_desc) to read blocks of data. The return value is the |
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* number of blocks read. A zero return indicates an error. |
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*/ |
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static unsigned long systemace_read(int dev, |
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unsigned long start, |
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unsigned long blkcnt, |
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unsigned long *buffer) |
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{ |
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unsigned val; |
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int retry; |
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unsigned char*dp = (unsigned char*)buffer; |
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if (get_cf_lock() < 0) { |
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unsigned status = ace_readw(0x04); |
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/* If CFDETECT is false, card is missing. */ |
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if (! (status&0x0010)) { |
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printf("** CompactFlash card not present. **\n"); |
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return 0; |
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} |
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printf("**** ACE locked away from me (STATUSREG=%04x)\n", status); |
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return 0; |
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} |
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retry = 2000; |
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for (;;) { |
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unsigned val = ace_readw(0x04); |
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/* If CFDETECT is false, card is missing. */ |
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if (! (val & 0x0010)) { |
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printf("**** ACE CompactFlash not found.\n"); |
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release_cf_lock(); |
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return 0; |
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} |
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/* If RDYFORCMD, then we are ready to go. */ |
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if (val & 0x0100) |
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break; |
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if (retry < 0) { |
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printf("**** SystemACE not ready.\n"); |
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release_cf_lock(); |
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return 0; |
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} |
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udelay(1000); |
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retry -= 1; |
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} |
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/* Write LBA block address */ |
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ace_writew(start & 0xffff, 0x10); |
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start >>= 16; |
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ace_writew(start & 0xff, 0x12); |
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/* Write sector count | ReadMemCardData. */ |
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ace_writew(blkcnt | 0x0300, 0x14); |
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/* CONTROLREG = CFGRESET|LOCKREQ */ |
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ace_writew(0x0082, 0x18); |
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retry = blkcnt * 16; |
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while (retry > 0) { |
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int idx; |
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/* Wait for buffer to become ready. */ |
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while (! (ace_readw(0x04) & 0x0020)) { |
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udelay(1000); |
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} |
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/* Read 16 words of 2bytes from the sector buffer. */ |
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for (idx = 0 ; idx < 16 ; idx += 1) { |
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unsigned short val = ace_readw(0x40); |
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*dp++ = val & 0xff; |
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*dp++ = (val>>8) & 0xff; |
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} |
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retry -= 1; |
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} |
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release_cf_lock(); |
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return blkcnt; |
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} |
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#endif |
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/*
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* $Log: $ |
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*/ |
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@ -0,0 +1,31 @@ |
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#ifndef __SYSTEMACE_H |
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#define __SYSTEMACE_H |
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/*
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* Copyright (c) 2004 Picture Elements, Inc. |
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* Stephen Williams (steve@picturel.com) |
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* |
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* This source code is free software; you can redistribute it |
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* and/or modify it in source code form under the terms of the GNU |
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* General Public License as published by the Free Software |
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* Foundation; either version 2 of the License, or (at your option) |
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* any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
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*/ |
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#ident "$Id:$" |
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#ifdef CONFIG_SYSTEMACE |
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# include <part.h> |
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block_dev_desc_t * systemace_get_dev(int dev); |
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#endif /* CONFIG_SYSTEMACE */ |
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#endif /* __SYSTEMACE_H */ |
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