[PATCH 6_9] Move common_cmd_ace.c to drivers_systemace.c
The code in this file is not a command; it is a device driver. Put it in
the correct place. There are zero functional changes in this patch, it
only moves the file.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/Makefile b/drivers/Makefile
index 5a369df..fffc22a 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -44,7 +44,7 @@
serial.o serial_max3100.o \
serial_pl010.o serial_pl011.o serial_xuartlite.o \
sl811_usb.o sm501.o smc91111.o smiLynxEM.o \
- status_led.o sym53c8xx.o ahci.o \
+ status_led.o sym53c8xx.o systemace.o ahci.o \
ti_pci1410a.o tigon3.o tsec.o \
usbdcore.o usbdcore_ep0.o usbdcore_omap1510.o usbtty.o \
videomodes.o w83c553f.o \
diff --git a/drivers/systemace.c b/drivers/systemace.c
new file mode 100644
index 0000000..8dd98d0
--- /dev/null
+++ b/drivers/systemace.c
@@ -0,0 +1,264 @@
+/*
+ * 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
+ */
+
+/*
+ * 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 */