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-rw-r--r--u-boot/post/board/lwmon5/gdc.c380
1 files changed, 380 insertions, 0 deletions
diff --git a/u-boot/post/board/lwmon5/gdc.c b/u-boot/post/board/lwmon5/gdc.c
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+++ b/u-boot/post/board/lwmon5/gdc.c
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+/*
+ * (C) Copyright 2008 Dmitry Rakhchev, EmCraft Systems, rda@emcraft.com
+ *
+ * Developed for DENX Software Engineering GmbH
+ *
+ * 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
+ */
+#include <common.h>
+
+/* This test attempts to verify board GDC. A scratch register tested, then
+ * simple memory test (get_ram_size()) run over GDC memory.
+ */
+
+#include <post.h>
+#include <watchdog.h>
+#include <asm/io.h>
+#include <video.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define GDC_SCRATCH_REG 0xC1FF8044
+#define GDC_VERSION_REG 0xC1FF8084
+#define GDC_HOST_BASE 0xC1FC0000
+#define GDC_RAM_START 0xC0000000
+#define GDC_RAM_END (GDC_HOST_BASE - 1)
+#define GDC_RAM_SIZE (GDC_RAM_END - GDC_RAM_START)
+
+#if CONFIG_POST & CONFIG_SYS_POST_BSPEC4
+
+const static unsigned long pattern[] = {
+ 0xffffffff,
+ 0xaaaaaaaa,
+ 0xcccccccc,
+ 0xf0f0f0f0,
+ 0xff00ff00,
+ 0xffff0000,
+ 0x0000ffff,
+ 0x00ff00ff,
+ 0x0f0f0f0f,
+ 0x33333333,
+ 0x55555555,
+ 0x00000000
+};
+
+const static unsigned long otherpattern = 0x01234567;
+
+/* test write/read og a given LIME Register */
+static int gdc_test_reg_one(uint value)
+{
+ int ret;
+ uint read_value;
+
+ /* write test pattern */
+ out_be32((void *)GDC_SCRATCH_REG, value);
+ /* read other location (protect against data lines capacity) */
+ ret = in_be32((void *)GDC_RAM_START);
+ /* verify test pattern */
+ read_value = in_be32((void *)GDC_SCRATCH_REG);
+ if (read_value != value) {
+ post_log("GDC SCRATCH test failed write %08X, read %08X\n",
+ value, read_value);
+ }
+
+ return (read_value != value);
+}
+
+/* test with a given static 32 bit pattern in a given memory addressrange */
+static int gdc_post_test1(ulong *start, ulong size, ulong val)
+{
+ int ret = 0;
+ ulong i = 0;
+ ulong *mem = start;
+ ulong readback;
+
+ for (i = 0; i < size / sizeof(ulong); i++) {
+ mem[i] = val;
+ if (i % 1024 == 0)
+ WATCHDOG_RESET();
+ }
+
+ for (i = 0; i < size / sizeof(ulong); i++) {
+ readback = mem[i];
+ if (readback != val) {
+ post_log("GDC Memory error at %08x, "
+ "wrote %08x, read %08x !\n",
+ mem + i, val, readback);
+ ret = -1;
+ break;
+ }
+ if (i % 1024 == 0)
+ WATCHDOG_RESET();
+ }
+
+ return ret;
+}
+
+/* test with dynamic 32 bit pattern in a given memory addressrange */
+static int gdc_post_test2(ulong *start, ulong size)
+{
+ int ret = 0;
+ ulong i = 0;
+ ulong *mem = start;
+ ulong readback;
+
+ for (i = 0; i < size / sizeof(ulong); i++) {
+ mem[i] = 1 << (i % 32);
+ if (i % 1024 == 0)
+ WATCHDOG_RESET();
+ }
+
+ for (i = 0; i < size / sizeof(ulong); i++) {
+ readback = mem[i];
+ if (readback != 1 << (i % 32)) {
+ post_log("GDC Memory error at %08x, "
+ "wrote %08x, read %08x !\n",
+ mem + i, 1 << (i % 32), readback);
+ ret = -1;
+ break;
+ }
+ if (i % 1024 == 0)
+ WATCHDOG_RESET();
+ }
+
+ return ret;
+}
+
+/* test with dynamic 32 bit pattern in a given memory addressrange */
+static int gdc_post_test3(ulong *start, ulong size)
+{
+ int ret = 0;
+ ulong i = 0;
+ ulong *mem = start;
+ ulong readback;
+
+ for (i = 0; i < size / sizeof(ulong); i++) {
+ mem[i] = i;
+ if (i % 1024 == 0)
+ WATCHDOG_RESET();
+ }
+
+ for (i = 0; i < size / sizeof(ulong); i++) {
+ readback = mem[i];
+ if (readback != i) {
+ post_log("GDC Memory error at %08x, "
+ "wrote %08x, read %08x !\n",
+ mem + i, i, readback);
+ ret = -1;
+ break;
+ }
+ if (i % 1024 == 0)
+ WATCHDOG_RESET();
+ }
+
+ return ret;
+}
+
+/* test with dynamic 32 bit pattern in a given memory addressrange */
+static int gdc_post_test4(ulong *start, ulong size)
+{
+ int ret = 0;
+ ulong i = 0;
+ ulong *mem = start;
+ ulong readback;
+
+ for (i = 0; i < size / sizeof(ulong); i++) {
+ mem[i] = ~i;
+ if (i % 1024 == 0)
+ WATCHDOG_RESET();
+ }
+
+ for (i = 0; i < size / sizeof(ulong); i++) {
+ readback = mem[i];
+ if (readback != ~i) {
+ post_log("GDC Memory error at %08x, "
+ "wrote %08x, read %08x !\n",
+ mem + i, ~i, readback);
+ ret = -1;
+ break;
+ }
+ if (i % 1024 == 0)
+ WATCHDOG_RESET();
+ }
+
+ return ret;
+}
+
+/* do some patterntests in a given addressrange */
+int gdc_mem_test(ulong *start, ulong size)
+{
+ int ret = 0;
+
+ /*
+ * check addressrange and do different static and dynamic
+ * pattern tests with it.
+ */
+ if (((void *)start) + size <= (void *)GDC_RAM_END) {
+ if (ret == 0)
+ ret = gdc_post_test1(start, size, 0x00000000);
+
+ if (ret == 0)
+ ret = gdc_post_test1(start, size, 0xffffffff);
+
+ if (ret == 0)
+ ret = gdc_post_test1(start, size, 0x55555555);
+
+ if (ret == 0)
+ ret = gdc_post_test1(start, size, 0xaaaaaaaa);
+
+ if (ret == 0)
+ ret = gdc_post_test2(start, size);
+
+ if (ret == 0)
+ ret = gdc_post_test3(start, size);
+
+ if (ret == 0)
+ ret = gdc_post_test4(start, size);
+ }
+
+ return ret;
+}
+
+/* test function of gdc memory addresslines*/
+static int gdc_post_addrline(ulong *address, ulong *base, ulong size)
+{
+ ulong *target;
+ ulong *end;
+ ulong readback = 0;
+ ulong xor = 0;
+ int ret = 0;
+
+ end = (ulong *)((ulong)base + size);
+
+ for (xor = sizeof(long); xor > 0; xor <<= 1) {
+ target = (ulong *)((ulong)address ^ xor);
+ if ((target >= base) && (target < end)) {
+ *address = ~*target;
+ readback = *target;
+ }
+
+ if (readback == *address) {
+ post_log("GDC Memory (address line) error at %08x"
+ "XOR value %08x !\n",
+ address, target , xor);
+ ret = -1;
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static int gdc_post_dataline(ulong *address)
+{
+ unsigned long temp32 = 0;
+ int i = 0;
+ int ret = 0;
+
+ for (i = 0; i < ARRAY_SIZE(pattern); i++) {
+ *address = pattern[i];
+ /*
+ * Put a different pattern on the data lines: otherwise they
+ * may float long enough to read back what we wrote.
+ */
+ *(address + 1) = otherpattern;
+ temp32 = *address;
+
+ if (temp32 != pattern[i]){
+ post_log("GDC Memory (date line) error at %08x, "
+ "wrote %08x, read %08x !\n",
+ address, pattern[i], temp32);
+ ret = 1;
+ }
+ }
+
+ return ret;
+}
+
+/* Verify GDC, get memory size, verify GDC memory */
+int gdc_post_test(int flags)
+{
+ uint old_value;
+ int i = 0;
+ int ret = 0;
+
+ post_log("\n");
+ old_value = in_be32((void *)GDC_SCRATCH_REG);
+
+ /*
+ * GPIOC2 register behaviour: the LIME graphics processor has a
+ * maximum of 5 GPIO ports that can be used in this hardware
+ * configuration. Thus only the bits for these 5 GPIOs can be
+ * activated in the GPIOC2 register. All other bits will always be
+ * read as zero.
+ */
+ if (gdc_test_reg_one(0x00150015))
+ ret = 1;
+ if (gdc_test_reg_one(0x000A000A))
+ ret = 1;
+
+ out_be32((void *)GDC_SCRATCH_REG, old_value);
+
+ old_value = in_be32((void *)GDC_VERSION_REG);
+ post_log("GDC chip version %u.%u, year %04X\n",
+ (old_value >> 8) & 0xFF, old_value & 0xFF,
+ (old_value >> 16) & 0xFFFF);
+
+ old_value = get_ram_size((void *)GDC_RAM_START,
+ 0x02000000);
+
+ debug("GDC RAM size (ist): %d bytes\n", old_value);
+ debug("GDC RAM size (soll): %d bytes\n", GDC_RAM_SIZE);
+ post_log("GDC RAM size: %d bytes\n", old_value);
+
+ /* Test SDRAM datalines */
+ if (gdc_post_dataline((ulong *)GDC_RAM_START)) {
+ ret = 1;
+ goto out;
+ }
+ WATCHDOG_RESET();
+
+ /* Test SDRAM adresslines */
+ if (gdc_post_addrline((ulong *)GDC_RAM_START,
+ (ulong *)GDC_RAM_START, GDC_RAM_SIZE)) {
+ ret = 1;
+ goto out;
+ }
+ WATCHDOG_RESET();
+ if (gdc_post_addrline((ulong *)GDC_RAM_END - sizeof(long),
+ (ulong *)GDC_RAM_START, GDC_RAM_SIZE)) {
+ ret = 1;
+ goto out;
+ }
+ WATCHDOG_RESET();
+
+ /* memory pattern test */
+ debug("GDC Memory test (flags %8x:%8x)\n", flags,
+ POST_SLOWTEST | POST_MANUAL);
+
+ if (flags & POST_MANUAL) {
+ debug("Full memory test\n");
+ if (gdc_mem_test((ulong *)GDC_RAM_START, GDC_RAM_SIZE)) {
+ ret = 1;
+ goto out;
+ }
+ /* load splashscreen again */
+ } else {
+ debug("smart memory test\n");
+ for (i = 0; i < (GDC_RAM_SIZE >> 20) && ret == 0; i++) {
+ if (ret == 0)
+ ret = gdc_mem_test((ulong *)(GDC_RAM_START +
+ (i << 20)),
+ 0x800);
+ if (ret == 0)
+ ret = gdc_mem_test((ulong *)(GDC_RAM_START +
+ (i << 20) + 0xff800),
+ 0x800);
+ }
+ }
+ WATCHDOG_RESET();
+
+out:
+ return ret;
+}
+#endif /* CONFIG_POST & CONFIG_SYS_POST_BSPEC4 */
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