summaryrefslogtreecommitdiff
path: root/common/cmd_ace.c
diff options
context:
space:
mode:
Diffstat (limited to 'common/cmd_ace.c')
-rw-r--r--common/cmd_ace.c267
1 files changed, 0 insertions, 267 deletions
diff --git a/common/cmd_ace.c b/common/cmd_ace.c
deleted file mode 100644
index b6d6105..0000000
--- a/common/cmd_ace.c
+++ /dev/null
@@ -1,267 +0,0 @@
-/*
- * 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.
- *
- * According to Xilinx technical support, before accessing the
- * SystemACE CF you need to set the following control bits:
- * FORCECFGMODE : 1
- * CFGMODE : 0
- * CFGSTART : 0
- */
-
-# 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)
-{
-#if (CFG_SYSTEMACE_WIDTH == 8)
- u16 temp;
-
-#if !defined(__BIG_ENDIAN)
- temp =((u16)readb(CFG_SYSTEMACE_BASE+offset) << 8);
- temp |= (u16)readb(CFG_SYSTEMACE_BASE+offset+1);
-#else
- temp = (u16)readb(CFG_SYSTEMACE_BASE+offset);
- temp |=((u16)readb(CFG_SYSTEMACE_BASE+offset+1) << 8);
-#endif
- return temp;
-#else
- return readw(CFG_SYSTEMACE_BASE+offset);
-#endif
-}
-
-static void ace_writew(unsigned val, unsigned offset)
-{
-#if (CFG_SYSTEMACE_WIDTH == 8)
-#if !defined(__BIG_ENDIAN)
- writeb((u8)(val>>8), CFG_SYSTEMACE_BASE+offset);
- writeb((u8)val, CFG_SYSTEMACE_BASE+offset+1);
-#else
- writeb((u8)val, CFG_SYSTEMACE_BASE+offset);
- writeb((u8)(val>>8), CFG_SYSTEMACE_BASE+offset+1);
-#endif
-#else
- writew(val, CFG_SYSTEMACE_BASE+offset);
-#endif
-}
-
-/* */
-
-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 */
- unsigned val=ace_readw(0x18);
- val|=0x0002;
- ace_writew((val&0xffff), 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)
-{
- unsigned val=ace_readw(0x18);
- val&=~(0x0002);
- ace_writew((val&0xffff), 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.dev = 0;
- 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;
-
- init_part(&systemace_dev);
-
- }
-
- 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)
-{
- int retry;
- unsigned blk_countdown;
- unsigned char*dp = (unsigned char*)buffer;
- unsigned val;
-
- 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;
- }
-
-#ifdef DEBUG_SYSTEMACE
- printf("... systemace read %lu sectors at %lu\n", blkcnt, start);
-#endif
-
- retry = 2000;
- for (;;) {
- 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;
- }
-
- /* The SystemACE can only transfer 256 sectors at a time, so
- limit the current chunk of sectors. The blk_countdown
- variable is the number of sectors left to transfer. */
-
- blk_countdown = blkcnt;
- while (blk_countdown > 0) {
- unsigned trans = blk_countdown;
-
- if (trans > 256) trans = 256;
-
-#ifdef DEBUG_SYSTEMACE
- printf("... transfer %lu sector in a chunk\n", trans);
-#endif
- /* Write LBA block address */
- ace_writew((start>> 0) & 0xffff, 0x10);
- ace_writew((start>>16) & 0x00ff, 0x12);
-
- /* NOTE: in the Write Sector count below, a count of 0
- causes a transfer of 256, so &0xff gives the right
- value for whatever transfer count we want. */
-
- /* Write sector count | ReadMemCardData. */
- ace_writew((trans&0xff) | 0x0300, 0x14);
-
- /* Reset the configruation controller */
- val = ace_readw(0x18);
- val|=0x0080;
- ace_writew(val, 0x18);
-
- retry = trans * 16;
- while (retry > 0) {
- int idx;
-
- /* Wait for buffer to become ready. */
- while (! (ace_readw(0x04) & 0x0020)) {
- udelay(100);
- }
-
- /* 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;
- }
-
- /* Clear the configruation controller reset */
- val = ace_readw(0x18);
- val&=~0x0080;
- ace_writew(val, 0x18);
-
- /* Count the blocks we transfer this time. */
- start += trans;
- blk_countdown -= trans;
- }
-
- release_cf_lock();
-
- return blkcnt;
-}
-#endif /* CONFIG_SYSTEMACE */
generated by cgit v1.1 at 2024-11-29 12:52:59 +0000