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-rw-r--r--drivers/fpga/fpga.c335
1 files changed, 335 insertions, 0 deletions
diff --git a/drivers/fpga/fpga.c b/drivers/fpga/fpga.c
new file mode 100644
index 0000000..67a6c30
--- /dev/null
+++ b/drivers/fpga/fpga.c
@@ -0,0 +1,335 @@
+/*
+ * (C) Copyright 2002
+ * Rich Ireland, Enterasys Networks, rireland@enterasys.com.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it 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
+ *
+ */
+
+/*
+ * Generic FPGA support
+ */
+#include <common.h> /* core U-Boot definitions */
+#include <xilinx.h> /* xilinx specific definitions */
+#include <altera.h> /* altera specific definitions */
+
+#if 0
+#define FPGA_DEBUG /* define FPGA_DEBUG to get debug messages */
+#endif
+
+/* Local definitions */
+#ifndef CONFIG_MAX_FPGA_DEVICES
+#define CONFIG_MAX_FPGA_DEVICES 5
+#endif
+
+/* Enable/Disable debug console messages */
+#ifdef FPGA_DEBUG
+#define PRINTF(fmt,args...) printf (fmt ,##args)
+#else
+#define PRINTF(fmt,args...)
+#endif
+
+/* Local static data */
+static ulong relocation_offset = 0;
+static int next_desc = FPGA_INVALID_DEVICE;
+static fpga_desc desc_table[CONFIG_MAX_FPGA_DEVICES];
+
+/* Local static functions */
+static __attribute__((__const__)) fpga_desc * __attribute__((__const__)) fpga_get_desc( int devnum );
+static __attribute__((__const__)) fpga_desc * __attribute__((__const__)) fpga_validate( int devnum, void *buf,
+ size_t bsize, char *fn );
+static int fpga_dev_info( int devnum );
+
+
+/* ------------------------------------------------------------------------- */
+
+/* fpga_no_sup
+ * 'no support' message function
+ */
+static void fpga_no_sup( char *fn, char *msg )
+{
+ if ( fn && msg ) {
+ printf( "%s: No support for %s.\n", fn, msg);
+ } else if ( msg ) {
+ printf( "No support for %s.\n", msg);
+ } else {
+ printf( "No FPGA suport!\n");
+ }
+}
+
+
+/* fpga_get_desc
+ * map a device number to a descriptor
+ */
+static __attribute__((__const__)) fpga_desc * __attribute__((__const__)) fpga_get_desc( int devnum )
+{
+ fpga_desc *desc = (fpga_desc * )NULL;
+
+ if (( devnum >= 0 ) && (devnum < next_desc )) {
+ desc = &desc_table[devnum];
+ PRINTF( "%s: found fpga descriptor #%d @ 0x%p\n",
+ __FUNCTION__, devnum, desc );
+ }
+
+ return desc;
+}
+
+
+/* fpga_validate
+ * generic parameter checking code
+ */
+static __attribute__((__const__)) fpga_desc * __attribute__((__const__)) fpga_validate( int devnum, void *buf,
+ size_t bsize, char *fn )
+{
+ fpga_desc * desc = fpga_get_desc( devnum );
+
+ if ( !desc ) {
+ printf( "%s: Invalid device number %d\n", fn, devnum );
+ }
+
+ if ( !buf ) {
+ printf( "%s: Null buffer.\n", fn );
+ return (fpga_desc * const)NULL;
+ }
+ return desc;
+}
+
+
+/* fpga_dev_info
+ * generic multiplexing code
+ */
+static int fpga_dev_info( int devnum )
+{
+ int ret_val = FPGA_FAIL; /* assume failure */
+ const fpga_desc * const desc = fpga_get_desc( devnum );
+
+ if ( desc ) {
+ PRINTF( "%s: Device Descriptor @ 0x%p\n",
+ __FUNCTION__, desc->devdesc );
+
+ switch ( desc->devtype ) {
+ case fpga_xilinx:
+#if defined(CONFIG_FPGA_XILINX)
+ printf( "Xilinx Device\nDescriptor @ 0x%p\n", desc );
+ ret_val = xilinx_info( desc->devdesc );
+#else
+ fpga_no_sup( (char *)__FUNCTION__, "Xilinx devices" );
+#endif
+ break;
+ case fpga_altera:
+#if defined(CONFIG_FPGA_ALTERA)
+ printf( "Altera Device\nDescriptor @ 0x%p\n", desc );
+ ret_val = altera_info( desc->devdesc );
+#else
+ fpga_no_sup( (char *)__FUNCTION__, "Altera devices" );
+#endif
+ break;
+ default:
+ printf( "%s: Invalid or unsupported device type %d\n",
+ __FUNCTION__, desc->devtype );
+ }
+ } else {
+ printf( "%s: Invalid device number %d\n",
+ __FUNCTION__, devnum );
+ }
+
+ return ret_val;
+}
+
+
+/* fpga_reloc
+ * generic multiplexing code
+ */
+int fpga_reloc( fpga_type devtype, void *desc, ulong reloc_off )
+{
+ int ret_val = FPGA_FAIL;
+
+ PRINTF( "%s: Relocating Device of type %d @ 0x%p with offset %lx\n",
+ __FUNCTION__, devtype, desc, reloc_off );
+
+ switch ( devtype ) {
+ case fpga_xilinx:
+#if defined(CONFIG_FPGA_XILINX)
+ ret_val = xilinx_reloc( desc, reloc_off );
+#else
+ fpga_no_sup( (char *)__FUNCTION__, "Xilinx devices" );
+#endif
+ break;
+ case fpga_altera:
+#if defined(CONFIG_FPGA_ALTERA)
+ ret_val = altera_reloc( desc, reloc_off );
+#else
+ fpga_no_sup( (char *)__FUNCTION__, "Altera devices" );
+#endif
+ break;
+ default:
+ printf( "%s: Invalid or unsupported device type %d\n",
+ __FUNCTION__, devtype );
+ }
+
+ return ret_val;
+}
+
+/* ------------------------------------------------------------------------- */
+/* fgpa_init is usually called from misc_init_r() and MUST be called
+ * before any of the other fpga functions are used.
+ */
+void fpga_init( ulong reloc_off )
+{
+ relocation_offset = reloc_off;
+ next_desc = 0;
+ memset( desc_table, 0, sizeof(desc_table));
+
+ PRINTF( "%s: CONFIG_FPGA = 0x%x\n", __FUNCTION__, CONFIG_FPGA );
+}
+
+/* fpga_count
+ * Basic interface function to get the current number of devices available.
+ */
+int fpga_count( void )
+{
+ return next_desc;
+}
+
+/* fpga_add
+ * Attempts to relocate the device/board specific interface code
+ * to the proper RAM locations and adds the device descriptor to
+ * the device table.
+ */
+int fpga_add( fpga_type devtype, void *desc )
+{
+ int devnum = FPGA_INVALID_DEVICE;
+
+ if ( next_desc < 0 ) {
+ printf( "%s: FPGA support not initialized!\n", __FUNCTION__ );
+ } else if (( devtype > fpga_min_type ) && ( devtype < fpga_undefined )) {
+ if ( desc ) {
+ if ( next_desc < CONFIG_MAX_FPGA_DEVICES ) {
+ if ( fpga_reloc( devtype, desc, relocation_offset )
+ == FPGA_SUCCESS ) {
+ devnum = next_desc;
+ desc_table[next_desc].devtype = devtype;
+ desc_table[next_desc++].devdesc = desc;
+ } else {
+ printf( "%s: Unable to relocate device interface table!\n",
+ __FUNCTION__ );
+ }
+ } else {
+ printf( "%s: Exceeded Max FPGA device count\n", __FUNCTION__ );
+ }
+ } else {
+ printf( "%s: NULL device descriptor\n", __FUNCTION__ );
+ }
+ } else {
+ printf( "%s: Unsupported FPGA type %d\n", __FUNCTION__, devtype );
+ }
+
+ return devnum;
+}
+
+/*
+ * Generic multiplexing code
+ */
+int fpga_load( int devnum, void *buf, size_t bsize )
+{
+ int ret_val = FPGA_FAIL; /* assume failure */
+ fpga_desc * desc = fpga_validate( devnum, buf, bsize, (char *)__FUNCTION__ );
+
+ if ( desc ) {
+ switch ( desc->devtype ) {
+ case fpga_xilinx:
+#if defined(CONFIG_FPGA_XILINX)
+ ret_val = xilinx_load( desc->devdesc, buf, bsize );
+#else
+ fpga_no_sup( (char *)__FUNCTION__, "Xilinx devices" );
+#endif
+ break;
+ case fpga_altera:
+#if defined(CONFIG_FPGA_ALTERA)
+ ret_val = altera_load( desc->devdesc, buf, bsize );
+#else
+ fpga_no_sup( (char *)__FUNCTION__, "Altera devices" );
+#endif
+ break;
+ default:
+ printf( "%s: Invalid or unsupported device type %d\n",
+ __FUNCTION__, desc->devtype );
+ }
+ }
+
+ return ret_val;
+}
+
+/* fpga_dump
+ * generic multiplexing code
+ */
+int fpga_dump( int devnum, void *buf, size_t bsize )
+{
+ int ret_val = FPGA_FAIL; /* assume failure */
+ fpga_desc * desc = fpga_validate( devnum, buf, bsize, (char *)__FUNCTION__ );
+
+ if ( desc ) {
+ switch ( desc->devtype ) {
+ case fpga_xilinx:
+#if defined(CONFIG_FPGA_XILINX)
+ ret_val = xilinx_dump( desc->devdesc, buf, bsize );
+#else
+ fpga_no_sup( (char *)__FUNCTION__, "Xilinx devices" );
+#endif
+ break;
+ case fpga_altera:
+#if defined(CONFIG_FPGA_ALTERA)
+ ret_val = altera_dump( desc->devdesc, buf, bsize );
+#else
+ fpga_no_sup( (char *)__FUNCTION__, "Altera devices" );
+#endif
+ break;
+ default:
+ printf( "%s: Invalid or unsupported device type %d\n",
+ __FUNCTION__, desc->devtype );
+ }
+ }
+
+ return ret_val;
+}
+
+
+/* fpga_info
+ * front end to fpga_dev_info. If devnum is invalid, report on all
+ * available devices.
+ */
+int fpga_info( int devnum )
+{
+ if ( devnum == FPGA_INVALID_DEVICE ) {
+ if ( next_desc > 0 ) {
+ int dev;
+
+ for ( dev = 0; dev < next_desc; dev++ ) {
+ fpga_dev_info( dev );
+ }
+ return FPGA_SUCCESS;
+ } else {
+ printf( "%s: No FPGA devices available.\n", __FUNCTION__ );
+ return FPGA_FAIL;
+ }
+ }
+ else return fpga_dev_info( devnum );
+}
+
+/* ------------------------------------------------------------------------- */
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