Add support for the tms320671x host port interface (HPI)

5 files changed, 678 insertions, 2 deletions

diff --git a/board/spc1920/Makefile b/board/spc1920/Makefile
index 424ab1c..0c48c3a 100644
--- a/board/spc1920/Makefile
+++ b/board/spc1920/Makefile
@@ -25,7 +25,7 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	= $(BOARD).o
+COBJS	= $(BOARD).o hpi.o
 
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))
diff --git a/board/spc1920/hpi.c b/board/spc1920/hpi.c
new file mode 100644
index 0000000..687c170
--- /dev/null
+++ b/board/spc1920/hpi.c
@@ -0,0 +1,604 @@
+/*
+ * (C) Copyright 2006
+ * Markus Klotzbuecher, DENX Software Engineering, mk@denx.de.
+ *
+ * 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
+ */
+
+/*
+ * Host Port Interface (HPI)
+ */
+
+/* debug levels:
+ *  0 : errors
+ *  1 : usefull info
+ *  2 : lots of info
+ *  3 : noisy
+ */
+
+#define DEBUG 0
+
+#include <config.h>
+#include <common.h>
+#include <mpc8xx.h>
+
+#include "pld.h"
+#include "hpi.h"
+#include "spc1920.h" /* led function */
+
+#define	_NOT_USED_	0xFFFFFFFF
+
+/* original table:
+ * - inserted loops to achieve long CS low and high Periods (~217ns)
+ * - move cs high 2/4 to the right
+ */
+const uint dsp_table_slow[] =
+{
+	/* single read   (offset  0x00 in upm ram) */
+	0x8fffdc04, 0x0fffdc84, 0x0fffdc84, 0x0fffdc00,
+	0x3fffdc04, 0xffffdc84, 0xffffdc84, 0xffffdc05,
+
+	/* burst read    (offset 0x08 in upm ram) */
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+
+	/* single write  (offset 0x18 in upm ram) */
+	0x8fffd004, 0x0fffd084, 0x0fffd084, 0x3fffd000,
+	0xffffd084, 0xffffd084, 0xffffd005, _NOT_USED_,
+
+	/* burst write   (offset 0x20 in upm ram) */
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	/* refresh       (offset 0x30 in upm ram) */
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	/* exception     (offset 0x3C in upm ram) */
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+};
+
+/* dsp hpi upm ram table
+ * works fine for noninc access, failes on incremental.
+ * - removed first word
+ */
+const uint dsp_table_fast[] =
+{
+	/* single read   (offset  0x00 in upm ram) */
+	0x8fffdc04, 0x0fffdc04, 0x0fffdc00, 0x3fffdc04,
+	0xffffdc05, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+
+	/* burst read    (offset 0x08 in upm ram) */
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+
+	/* single write  (offset 0x18 in upm ram) */
+	0x8fffd004, 0x0fffd004, 0x3fffd000, 0xffffd005,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+
+	/* burst write   (offset 0x20 in upm ram) */
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	/* refresh       (offset 0x30 in upm ram) */
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+	/* exception     (offset 0x3C in upm ram) */
+	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
+};
+
+
+#ifdef CONFIG_SPC1920_HPI_TEST
+#undef HPI_TEST_OSZI
+
+#define HPI_TEST_CHUNKSIZE	0x1000
+#define HPI_TEST_PATTERN	0x00000000
+#define HPI_TEST_START		0x0
+#define HPI_TEST_END		0x30000
+
+#define TINY_AUTOINC_DATA_SIZE 16 /* 32bit words */
+#define TINY_AUTOINC_BASE_ADDR 0x0
+
+static int hpi_activate(void);
+static void hpi_inactivate(void);
+static void dsp_reset(void);
+
+static int hpi_write_inc(u32 addr, u32 *data, u32 count);
+static int hpi_read_inc(u32 addr, u32 *buf, u32 count);
+static int hpi_write_noinc(u32 addr, u32 data);
+static u32 hpi_read_noinc(u32 addr);
+
+int hpi_test(void);
+static int hpi_write_addr_test(u32 addr);
+static int hpi_read_write_test(u32 addr, u32 data);
+static int hpi_tiny_autoinc_test(void);
+#endif /* CONFIG_SPC1920_HPI_TEST */
+
+
+/* init the host port interface on UPMA */
+int hpi_init(void)
+{
+	volatile immap_t *immr = (immap_t *) CFG_IMMR;
+	volatile memctl8xx_t *memctl = &immr->im_memctl;
+	volatile spc1920_pld_t *pld = (spc1920_pld_t *) CFG_SPC1920_PLD_BASE;
+
+	upmconfig(UPMA, (uint *)dsp_table_slow, sizeof(dsp_table_slow)/sizeof(uint));
+	udelay(100);
+
+	memctl->memc_mamr = CFG_MAMR;
+	memctl->memc_or3 = CFG_OR3_PRELIM;
+	memctl->memc_br3 = CFG_BR3_PRELIM;
+
+	/* reset dsp */
+	dsp_reset();
+
+	/* activate hpi switch*/
+	pld->dsp_hpi_on = 0x1;
+
+	udelay(100);
+
+	return 0;
+}
+
+#ifdef CONFIG_SPC1920_HPI_TEST
+/* activate the Host Port interface */
+static int hpi_activate(void)
+{
+	volatile spc1920_pld_t *pld = (spc1920_pld_t *) CFG_SPC1920_PLD_BASE;
+
+	/* turn on hpi */
+	pld->dsp_hpi_on = 0x1;
+
+	udelay(5);
+
+	/* turn on the power EN_DSP_POWER high*/
+	/* currently always on TBD */
+
+	/* setup hpi control register */
+	HPI_HPIC_1 = (u16) 0x0008;
+	HPI_HPIC_2 = (u16) 0x0008;
+
+	udelay(100);
+
+	return 0;
+}
+
+/* turn off the host port interface */
+static void hpi_inactivate(void)
+{
+	volatile spc1920_pld_t *pld = (spc1920_pld_t *) CFG_SPC1920_PLD_BASE;
+
+	/* deactivate hpi */
+	pld->dsp_hpi_on = 0x0;
+
+	/* reset the dsp */
+	/* pld->dsp_reset = 0x0; */
+
+	/* turn off the power EN_DSP_POWER# high*/
+	/* currently always on TBD */
+
+}
+
+/* reset the DSP */
+static void dsp_reset(void)
+{
+	volatile spc1920_pld_t *pld = (spc1920_pld_t *) CFG_SPC1920_PLD_BASE;
+	pld->dsp_reset = 0x1;
+	pld->dsp_hpi_on = 0x0;
+
+	udelay(300000);
+
+	pld->dsp_reset = 0x0;
+	pld->dsp_hpi_on = 0x1;
+}
+
+
+/* write using autoinc (count is number of 32bit words) */
+static int hpi_write_inc(u32 addr, u32 *data, u32 count)
+{
+	int i;
+	u16 addr1, addr2;
+
+	addr1 = (u16) ((addr >> 16) & 0xffff); /* First HW is most significant */
+	addr2 = (u16) (addr & 0xffff);
+
+	/* write address */
+	HPI_HPIA_1 = addr1;
+	HPI_HPIA_2 = addr2;
+
+	debugX(4, "writing from data=0x%x to 0x%x\n", data, (data+count));
+
+	for(i=0; i<count; i++) {
+		HPI_HPID_INC_1 = (u16) ((data[i] >> 16) & 0xffff);
+		HPI_HPID_INC_2 = (u16) (data[i] & 0xffff);
+		debugX(4, "hpi_write_inc: data1=0x%x, data2=0x%x\n",
+		       (u16) ((data[i] >> 16) & 0xffff),
+		       (u16) (data[i] & 0xffff));
+	}
+#if 0
+	while(data_ptr < (u16*) (data + count)) {
+		HPI_HPID_INC_1 = *(data_ptr++);
+		HPI_HPID_INC_2 = *(data_ptr++);
+	}
+#endif
+
+	/* return number of bytes written */
+	return count;
+}
+
+/*
+ * read using autoinc (count is number of 32bit words)
+ */
+static int hpi_read_inc(u32 addr, u32 *buf, u32 count)
+{
+	int i;
+	u16 addr1, addr2, data1, data2;
+
+	addr1 = (u16) ((addr >> 16) & 0xffff); /* First HW is most significant */
+	addr2 = (u16) (addr & 0xffff);
+
+	/* write address */
+	HPI_HPIA_1 = addr1;
+	HPI_HPIA_2 = addr2;
+
+	for(i=0; i<count; i++) {
+		data1 = HPI_HPID_INC_1;
+		data2 = HPI_HPID_INC_2;
+		debugX(4, "hpi_read_inc: data1=0x%x, data2=0x%x\n", data1, data2);
+		buf[i] = (((u32) data1) << 16) | (data2 & 0xffff);
+	}
+
+#if 0
+	while(buf_ptr < (u16*) (buf + count)) {
+		*(buf_ptr++) = HPI_HPID_INC_1;
+		*(buf_ptr++) = HPI_HPID_INC_2;
+	}
+#endif
+
+	/* return number of bytes read */
+	return count;
+}
+
+
+/* write to non- auto inc regs */
+static int hpi_write_noinc(u32 addr, u32 data)
+{
+
+	u16 addr1, addr2, data1, data2;
+
+	addr1 = (u16) ((addr >> 16) & 0xffff); /* First HW is most significant */
+	addr2 = (u16) (addr & 0xffff);
+
+	/* printf("hpi_write_noinc: addr1=0x%x, addr2=0x%x\n", addr1, addr2); */
+
+	HPI_HPIA_1 = addr1;
+	HPI_HPIA_2 = addr2;
+
+	data1 = (u16) ((data >> 16) & 0xffff);
+	data2 = (u16) (data & 0xffff);
+
+	/* printf("hpi_write_noinc: data1=0x%x, data2=0x%x\n", data1, data2); */
+
+	HPI_HPID_NOINC_1 = data1;
+	HPI_HPID_NOINC_2 = data2;
+
+	return 0;
+}
+
+/* read from non- auto inc regs */
+static u32 hpi_read_noinc(u32 addr)
+{
+	u16 addr1, addr2, data1, data2;
+	u32 ret;
+
+	addr1 = (u16) ((addr >> 16) & 0xffff); /* First HW is most significant */
+	addr2 = (u16) (addr & 0xffff);
+
+	HPI_HPIA_1 = addr1;
+	HPI_HPIA_2 = addr2;
+
+	/* printf("hpi_read_noinc: addr1=0x%x, addr2=0x%x\n", addr1, addr2); */
+
+	data1 = HPI_HPID_NOINC_1;
+	data2 = HPI_HPID_NOINC_2;
+
+	/* printf("hpi_read_noinc: data1=0x%x, data2=0x%x\n", data1, data2); */
+
+	ret = (((u32) data1) << 16) | (data2 & 0xffff);
+	return ret;
+
+}
+
+/*
+ * Host Port Interface Tests
+ */
+
+#ifndef HPI_TEST_OSZI
+/* main test function */
+int hpi_test(void)
+{
+	int err = 0;
+	u32 i, ii, pattern, tmp;
+
+	pattern = HPI_TEST_PATTERN;
+
+	u32 test_data[HPI_TEST_CHUNKSIZE];
+	u32 read_data[HPI_TEST_CHUNKSIZE];
+
+	debugX(2, "hpi_test: activating hpi...");
+	hpi_activate();
+	debugX(2, "OK.\n");
+
+#if 0
+	/* Dump the first 1024 bytes
+	 *
+	 */
+	for(i=0; i<1024; i+=4) {
+		if(i%16==0)
+			printf("\n0x%08x: ", i);
+		printf("0x%08x ", hpi_read_noinc(i));
+	}
+#endif
+
+	/* HPIA read-write test
+	 *
+	 */
+	debugX(1, "hpi_test: starting HPIA read-write tests...\n");
+	err |= hpi_write_addr_test(0xdeadc0de);
+	err |= hpi_write_addr_test(0xbeefd00d);
+	err |= hpi_write_addr_test(0xabcd1234);
+	err |= hpi_write_addr_test(0xaaaaaaaa);
+	if(err) {
+		debugX(1, "hpi_test: HPIA read-write tests: *** FAILED ***\n");
+		return -1;
+	}
+	debugX(1, "hpi_test: HPIA read-write tests: OK\n");
+
+
+	/* read write test using nonincremental data regs
+	 *
+	 */
+	debugX(1, "hpi_test: starting nonincremental tests...\n");
+	for(i=HPI_TEST_START; i<HPI_TEST_END; i+=4) {
+		err |= hpi_read_write_test(i, pattern);
+
+		/* stolen from cmd_mem.c */
+		if(pattern & 0x80000000) {
+			pattern = -pattern;	/* complement & increment */
+		} else {
+			pattern = ~pattern;
+		}
+		err |= hpi_read_write_test(i, pattern);
+
+		if(err) {
+			debugX(1, "hpi_test: nonincremental tests *** FAILED ***\n");
+			return -1;
+		}
+	}
+	debugX(1, "hpi_test: nonincremental test OK\n");
+
+	/* read write a chunk of data using nonincremental data regs
+	 *
+	 */
+	debugX(1, "hpi_test: starting nonincremental chunk tests...\n");
+	pattern = HPI_TEST_PATTERN;
+	for(i=HPI_TEST_START; i<HPI_TEST_END; i+=4) {
+		hpi_write_noinc(i, pattern);
+
+		/* stolen from cmd_mem.c */
+		if(pattern & 0x80000000) {
+			pattern = -pattern;	/* complement & increment */
+		} else {
+			pattern = ~pattern;
+		}
+	}
+	pattern = HPI_TEST_PATTERN;
+	for(i=HPI_TEST_START; i<HPI_TEST_END; i+=4) {
+		tmp = hpi_read_noinc(i);
+
+		if(tmp != pattern) {
+			debugX(1, "hpi_test: noninc chunk test *** FAILED *** @ 0x%x, written=0x%x, read=0x%x\n", i, pattern, tmp);
+			err = -1;
+		}
+		/* stolen from cmd_mem.c */
+		if(pattern & 0x80000000) {
+			pattern = -pattern;	/* complement & increment */
+		} else {
+			pattern = ~pattern;
+		}
+	}
+	if(err)
+		return -1;
+	debugX(1, "hpi_test: nonincremental chunk test OK\n");
+
+
+#ifdef DO_TINY_TEST
+	/* small verbose test using autoinc and nonautoinc to compare
+	 *
+	 */
+	debugX(1, "hpi_test: tiny_autoinc_test...\n");
+	hpi_tiny_autoinc_test();
+	debugX(1, "hpi_test: tiny_autoinc_test done\n");
+#endif /* DO_TINY_TEST */
+
+
+	/* $%& write a chunk of data using the autoincremental regs
+	 *
+	 */
+	debugX(1, "hpi_test: starting autoinc test %d chunks with 0x%x bytes...\n",
+	       ((HPI_TEST_END - HPI_TEST_START) / HPI_TEST_CHUNKSIZE),
+	       HPI_TEST_CHUNKSIZE);
+
+	for(i=HPI_TEST_START;
+	    i < ((HPI_TEST_END - HPI_TEST_START) / HPI_TEST_CHUNKSIZE);
+	    i++) {
+		/* generate the pattern data */
+		debugX(3, "generating pattern data: ");
+		for(ii = 0; ii < HPI_TEST_CHUNKSIZE; ii++) {
+			debugX(3, "0x%x ", pattern);
+
+			test_data[ii] = pattern;
+			read_data[ii] = 0x0; /* zero to be sure */
+
+			/* stolen from cmd_mem.c */
+			if(pattern & 0x80000000) {
+				pattern = -pattern;	/* complement & increment */
+			} else {
+				pattern = ~pattern;
+			}
+		}
+		debugX(3, "done\n");
+
+		debugX(2, "Writing autoinc data @ 0x%x\n", i);
+		hpi_write_inc(i, test_data, HPI_TEST_CHUNKSIZE);
+
+		debugX(2, "Reading autoinc data @ 0x%x\n", i);
+		hpi_read_inc(i, read_data, HPI_TEST_CHUNKSIZE);
+
+		/* compare */
+		for(ii = 0; ii < HPI_TEST_CHUNKSIZE; ii++) {
+			debugX(3, "hpi_test_autoinc: @ 0x%x, written=0x%x, read=0x%x", i+ii, test_data[ii], read_data[ii]);
+			if(read_data[ii] != test_data[ii]) {
+				debugX(0, "hpi_test: autoinc test @ 0x%x, written=0x%x, read=0x%x *** FAILED ***\n", i+ii, test_data[ii], read_data[ii]);
+				return -1;
+			}
+		}
+	}
+	debugX(1, "hpi_test: autoinc test OK\n");
+
+	return 0;
+}
+#else /* HPI_TEST_OSZI */
+int hpi_test(void)
+{
+	int i;
+	u32 read_data[TINY_AUTOINC_DATA_SIZE];
+
+	unsigned int dummy_data[TINY_AUTOINC_DATA_SIZE] = {
+		0x11112222, 0x33334444, 0x55556666, 0x77778888,
+		0x9999aaaa, 0xbbbbcccc, 0xddddeeee, 0xffff1111,
+		0x00010002, 0x00030004, 0x00050006, 0x00070008,
+		0x0009000a, 0x000b000c, 0x000d000e, 0x000f0001
+	};
+
+	debugX(0, "hpi_test: activating hpi...");
+	hpi_activate();
+	debugX(0, "OK.\n");
+
+	while(1) {
+		led9(1);
+		debugX(0, " writing to autoinc...\n");
+		hpi_write_inc(TINY_AUTOINC_BASE_ADDR,
+			      dummy_data, TINY_AUTOINC_DATA_SIZE);
+
+		debugX(0, " reading from autoinc...\n");
+		hpi_read_inc(TINY_AUTOINC_BASE_ADDR,
+			     read_data, TINY_AUTOINC_DATA_SIZE);
+
+		for(i=0; i < (TINY_AUTOINC_DATA_SIZE); i++) {
+			debugX(0, " written=0x%x, read(inc)=0x%x\n",
+			       dummy_data[i], read_data[i]);
+		}
+		led9(0);
+		udelay(2000000);
+	}
+	return 0;
+}
+#endif
+
+/* test if Host Port Address Register can be written correctly */
+static int hpi_write_addr_test(u32 addr)
+{
+	u32 read_back;
+	/* write address */
+	HPI_HPIA_1 = ((u16) (addr >> 16)); /* First HW is most significant */
+	HPI_HPIA_2 = ((u16) addr);
+
+	read_back = (((u32) HPI_HPIA_1)<<16) | ((u32) HPI_HPIA_2);
+
+	if(read_back == addr) {
+		debugX(2, " hpi_write_addr_test OK: written=0x%x, read=0x%x\n",
+		       addr, read_back);
+		return 0;
+	} else {
+		debugX(0, " hpi_write_addr_test *** FAILED ***: written=0x%x, read=0x%x\n",
+		      addr, read_back);
+		return -1;
+	}
+
+	return 0;
+}
+
+/* test if a simple read/write sequence succeeds */
+static int hpi_read_write_test(u32 addr, u32 data)
+{
+	u32 read_back;
+
+	hpi_write_noinc(addr, data);
+	read_back = hpi_read_noinc(addr);
+
+	if(read_back == data) {
+		debugX(2, " hpi_read_write_test: OK, addr=0x%x written=0x%x, read=0x%x\n", addr, data, read_back);
+		return 0;
+	} else {
+		debugX(0, " hpi_read_write_test: *** FAILED ***, addr=0x%x written=0x%x, read=0x%x\n", addr, data, read_back);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int hpi_tiny_autoinc_test(void)
+{
+	int i;
+	u32 read_data[TINY_AUTOINC_DATA_SIZE];
+	u32 read_data_noinc[TINY_AUTOINC_DATA_SIZE];
+
+	unsigned int dummy_data[TINY_AUTOINC_DATA_SIZE] = {
+		0x11112222, 0x33334444, 0x55556666, 0x77778888,
+		0x9999aaaa, 0xbbbbcccc, 0xddddeeee, 0xffff1111,
+		0x00010002, 0x00030004, 0x00050006, 0x00070008,
+		0x0009000a, 0x000b000c, 0x000d000e, 0x000f0001
+	};
+
+	printf(" writing to autoinc...\n");
+	hpi_write_inc(TINY_AUTOINC_BASE_ADDR, dummy_data, TINY_AUTOINC_DATA_SIZE);
+
+	printf(" reading from autoinc...\n");
+	hpi_read_inc(TINY_AUTOINC_BASE_ADDR, read_data, TINY_AUTOINC_DATA_SIZE);
+
+	printf(" reading from noinc for comparison...\n");
+	for(i=0; i < (TINY_AUTOINC_DATA_SIZE); i++)
+		read_data_noinc[i] = hpi_read_noinc(TINY_AUTOINC_BASE_ADDR+i*4);
+
+	for(i=0; i < (TINY_AUTOINC_DATA_SIZE); i++) {
+		printf(" written=0x%x, read(inc)=0x%x, read(noinc)=0x%x\n",
+		       dummy_data[i], read_data[i], read_data_noinc[i]);
+	}
+	return 0;
+}
+
+#endif /* CONFIG_SPC1920_HPI_TEST */
diff --git a/board/spc1920/hpi.h b/board/spc1920/hpi.h
new file mode 100644
index 0000000..4503873
--- /dev/null
+++ b/board/spc1920/hpi.h
@@ -0,0 +1,28 @@
+/*
+ * (C) Copyright 2006
+ * Markus Klotzbuecher, DENX Software Engineering, mk@denx.de.
+ *
+ * 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
+ */
+
+int hpi_init(void);
+
+#ifdef CONFIG_SPC1920_HPI_TEST
+int hpi_test(void);
+#endif
diff --git a/board/spc1920/spc1920.c b/board/spc1920/spc1920.c
index 028f4c6..1fc2ea1 100644
--- a/board/spc1920/spc1920.c
+++ b/board/spc1920/spc1920.c
@@ -27,9 +27,9 @@
 #include <common.h>
 #include <mpc8xx.h>
 #include "pld.h"
+#include "hpi.h"
 
 #define	_NOT_USED_	0xFFFFFFFF
-/* #define debug(fmt,args...)     printf (fmt ,##args) */
 
 static long int dram_size (long int, long int *, long int);
 
@@ -172,6 +172,8 @@ long int initdram (int board_type)
 	memctl->memc_br1 = (CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMB | BR_V;
 	udelay (1000);
 
+	/* initalize the DSP Host Port Interface */
+	hpi_init();
 
 	/* PLD Setup */
 	memctl->memc_or5 = CFG_OR5_PRELIM;
@@ -228,6 +230,14 @@ int board_early_init_f(void)
 	return 0;
 }
 
+int last_stage_init(void)
+{
+#ifdef CONFIG_SPC1920_HPI_TEST
+	printf("CMB1920 Host Port Interface Test: %s\n",
+	       hpi_test() ? "Failed!" : "OK");
+#endif
+	return 0;
+}
 
 int checkboard (void)
 {
diff --git a/include/configs/spc1920.h b/include/configs/spc1920.h
index 9d3609a..6e99699 100644
--- a/include/configs/spc1920.h
+++ b/include/configs/spc1920.h
@@ -330,6 +330,40 @@
 			MBMR_TLFB_4X) /* 0x04804114 */ /* 0x10802114 */
 
 
+/*
+ * DSP Host Port Interface CS3
+ */
+#define CFG_SPC1920_HPI_BASE   0x90000000
+#define CFG_PRELIM_OR3_AM      0xF0000000
+
+#define CFG_OR3_PRELIM         (CFG_PRELIM_OR3_AM | \
+				       OR_G5LS | \
+				       OR_SCY_0_CLK | \
+				       OR_BI)
+
+#define CFG_BR3_PRELIM ((CFG_SPC1920_HPI_BASE & BR_BA_MSK) | \
+					       BR_MS_UPMA | \
+					       BR_PS_16 | \
+					       BR_V);
+
+#define CFG_MAMR (MAMR_GPL_A4DIS | \
+		MAMR_RLFA_5X | \
+		MAMR_WLFA_5X)
+
+#define CONFIG_SPC1920_HPI_TEST
+
+#ifdef CONFIG_SPC1920_HPI_TEST
+#define HPI_REG(x)             (*((volatile u16 *) (CFG_SPC1920_HPI_BASE + x)))
+#define HPI_HPIC_1             HPI_REG(0)
+#define HPI_HPIC_2             HPI_REG(2)
+#define HPI_HPIA_1             HPI_REG(0x2000000)
+#define HPI_HPIA_2             HPI_REG(0x2000000 + 2)
+#define HPI_HPID_INC_1         HPI_REG(0x1000000)
+#define HPI_HPID_INC_2         HPI_REG(0x1000000 + 2)
+#define HPI_HPID_NOINC_1       HPI_REG(0x3000000)
+#define HPI_HPID_NOINC_2       HPI_REG(0x3000000 + 2)
+#endif /* CONFIG_SPC1920_HPI_TEST */
+
 /* PLD CS5 */
 #define CFG_SPC1920_PLD_BASE	0x80000000
 #define CFG_PRELIM_OR5_AM	0xffff8000