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-rw-r--r--sw/hash_tester.c286
-rw-r--r--sw/novena-eim.c1106
-rw-r--r--sw/novena-eim.h349
3 files changed, 894 insertions, 847 deletions
diff --git a/sw/hash_tester.c b/sw/hash_tester.c
index 4fbeaa3..a0ab0f1 100644
--- a/sw/hash_tester.c
+++ b/sw/hash_tester.c
@@ -63,13 +63,13 @@ int quiet = 0;
int repeat = 0;
/* instead of core number 0 we have a page of global registers */
-#define ADDR_GLOBAL_BOARD_TYPE EIM_BASE_ADDR + (0x00 << 2)
-#define ADDR_GLOBAL_BITSTREAM_VER EIM_BASE_ADDR + (0x01 << 2)
-#define ADDR_GLOBAL_DUMMY_REG EIM_BASE_ADDR + (0xFF << 2)
+#define ADDR_GLOBAL_BOARD_TYPE EIM_BASE_ADDR + (0x00 << 2)
+#define ADDR_GLOBAL_BITSTREAM_VER EIM_BASE_ADDR + (0x01 << 2)
+#define ADDR_GLOBAL_DUMMY_REG EIM_BASE_ADDR + (0xFF << 2)
-#define SEGMENT_OFFSET_HASHES EIM_BASE_ADDR + 0x000000
-#define SEGMENT_OFFSET_RNGS EIM_BASE_ADDR + 0x010000
-#define SEGMENT_OFFSET_CIPHERS EIM_BASE_ADDR + 0x020000
+#define SEGMENT_OFFSET_HASHES EIM_BASE_ADDR + 0x000000
+#define SEGMENT_OFFSET_RNGS EIM_BASE_ADDR + 0x010000
+#define SEGMENT_OFFSET_CIPHERS EIM_BASE_ADDR + 0x020000
/* addresses and codes common to all hash cores */
@@ -85,10 +85,10 @@ int repeat = 0;
#define ADDR_BLOCK 0x40
#define ADDR_DIGEST 0x80
-#define HASH_CORE_SIZE 0x400
+#define HASH_CORE_SIZE 0x400
/* addresses and codes for the specific hash cores */
-#define SHA1_ADDR_BASE EIM_BASE_ADDR + (1*HASH_CORE_SIZE)
+#define SHA1_ADDR_BASE SEGMENT_OFFSET_HASHES + (1*HASH_CORE_SIZE)
#define SHA1_ADDR_NAME0 SHA1_ADDR_BASE + ADDR_NAME0
#define SHA1_ADDR_NAME1 SHA1_ADDR_BASE + ADDR_NAME1
#define SHA1_ADDR_VERSION SHA1_ADDR_BASE + ADDR_VERSION
@@ -99,7 +99,7 @@ int repeat = 0;
#define SHA1_BLOCK_LEN 512 / 8
#define SHA1_DIGEST_LEN 160 / 8
-#define SHA256_ADDR_BASE EIM_BASE_ADDR + (2*HASH_CORE_SIZE)
+#define SHA256_ADDR_BASE SEGMENT_OFFSET_HASHES + (2*HASH_CORE_SIZE)
#define SHA256_ADDR_NAME0 SHA256_ADDR_BASE + ADDR_NAME0
#define SHA256_ADDR_NAME1 SHA256_ADDR_BASE + ADDR_NAME1
#define SHA256_ADDR_VERSION SHA256_ADDR_BASE + ADDR_VERSION
@@ -110,7 +110,7 @@ int repeat = 0;
#define SHA256_BLOCK_LEN 512 / 8
#define SHA256_DIGEST_LEN 256 / 8
-#define SHA512_ADDR_BASE EIM_BASE_ADDR + (3*HASH_CORE_SIZE)
+#define SHA512_ADDR_BASE SEGMENT_OFFSET_HASHES + (3*HASH_CORE_SIZE)
#define SHA512_ADDR_NAME0 SHA512_ADDR_BASE + ADDR_NAME0
#define SHA512_ADDR_NAME1 SHA512_ADDR_BASE + ADDR_NAME1
#define SHA512_ADDR_VERSION SHA512_ADDR_BASE + ADDR_VERSION
@@ -300,11 +300,11 @@ const uint8_t SHA512_DOUBLE_DIGEST[] =
void dump(char *label, const uint8_t *buf, int len)
{
if (debug) {
- int i;
- printf("%s [", label);
- for (i = 0; i < len; ++i)
- printf(" %02x", buf[i]);
- printf(" ]\n");
+ int i;
+ printf("%s [", label);
+ for (i = 0; i < len; ++i)
+ printf(" %02x", buf[i]);
+ printf(" ]\n");
}
}
@@ -313,9 +313,9 @@ int tc_write(off_t offset, const uint8_t *buf, int len)
dump("write ", buf, len);
for (; len > 0; offset += 4, buf += 4, len -= 4) {
- uint32_t val;
- val = htonl(*(uint32_t *)buf);
- eim_write_32(offset, &val);
+ uint32_t val;
+ val = htonl(*(uint32_t *)buf);
+ eim_write_32(offset, &val);
}
return 0;
@@ -327,9 +327,9 @@ int tc_read(off_t offset, uint8_t *buf, int len)
int rlen = len;
for (; rlen > 0; offset += 4, rbuf += 4, rlen -= 4) {
- uint32_t val;
- eim_read_32(offset, &val);
- *(uint32_t *)rbuf = ntohl(val);
+ uint32_t val;
+ eim_read_32(offset, &val);
+ *(uint32_t *)rbuf = ntohl(val);
}
dump("read ", buf, len);
@@ -396,14 +396,14 @@ int tc_wait(off_t offset, uint8_t status)
for (i = 0; i < 10; ++i) {
if (tc_read(offset, buf, 4) != 0)
return 1;
- if (buf[3] & status)
- return 0;
+ if (buf[3] & status)
+ return 0;
}
fprintf(stderr, "tc_wait timed out\n");
return 1;
#endif
}
-
+
int tc_wait_ready(off_t offset)
{
return tc_wait(offset, STATUS_READY_BIT);
@@ -414,6 +414,45 @@ int tc_wait_valid(off_t offset)
return tc_wait(offset, STATUS_VALID_BIT);
}
+/* ---------------- sanity test case ---------------- */
+
+int TC0()
+{
+ uint8_t board_type[4] = { 'P', 'V', 'T', '1'}; /* "PVT1" */
+ uint8_t bitstream_ver[4] = { 0x00, 0x01, 0x00, 0x0B }; /* v0.1.0b */
+ uint8_t t[4];
+
+ uint8_t seg_rngs_reg_first[4] = { 0xAA, 0xAA, 0xAA, 0xAA};
+ uint8_t seg_rngs_reg_second[4] = { 0xBB, 0xBB, 0xBB, 0xBB};
+ uint8_t seg_rngs_reg_third[4] = { 0xCC, 0xCC, 0xCC, 0xCC};
+
+ uint8_t seg_ciphers_reg_first[4] = { 0xDD, 0xDD, 0xDD, 0xDD};
+ uint8_t seg_ciphers_reg_second[4] = { 0xEE, 0xEE, 0xEE, 0xEE};
+ uint8_t seg_ciphers_reg_third[4] = { 0xFF, 0xFF, 0xFF, 0xFF};
+
+ if (!quiet)
+ printf("TC0: Reading board type, version, and dummy reg from global registers.\n");
+
+ /* write current time into dummy register, then try to read it back
+ * to make sure that we can actually write something into EIM
+ */
+ (void)time((time_t *)t);
+ tc_write(ADDR_GLOBAL_DUMMY_REG, (void *)&t, 4);
+
+ return
+ tc_expected(ADDR_GLOBAL_BOARD_TYPE, board_type, 4) ||
+ tc_expected(ADDR_GLOBAL_BITSTREAM_VER, bitstream_ver, 4) ||
+ tc_expected(ADDR_GLOBAL_DUMMY_REG, (void *)t, 4) ||
+
+ tc_expected(SEGMENT_OFFSET_RNGS + (0 << 2), seg_rngs_reg_first, 4) ||
+ tc_expected(SEGMENT_OFFSET_RNGS + (1 << 2), seg_rngs_reg_second, 4) ||
+ tc_expected(SEGMENT_OFFSET_RNGS + (2 << 2), seg_rngs_reg_third, 4) ||
+
+ tc_expected(SEGMENT_OFFSET_CIPHERS + (0 << 2), seg_ciphers_reg_first, 4) ||
+ tc_expected(SEGMENT_OFFSET_CIPHERS + (1 << 2), seg_ciphers_reg_second, 4) ||
+ tc_expected(SEGMENT_OFFSET_CIPHERS + (2 << 2), seg_ciphers_reg_third, 4);
+}
+
/* ---------------- SHA-1 test cases ---------------- */
/* TC1: Read name and version from SHA-1 core. */
@@ -424,7 +463,7 @@ int TC1(void)
uint8_t version[4] = { 0x30, 0x2e, 0x35, 0x30 }; /* "0.50" */
if (!quiet)
- printf("TC1: Reading name, type and version words from SHA-1 core.\n");
+ printf("TC1: Reading name, type and version words from SHA-1 core.\n");
return
tc_expected(SHA1_ADDR_NAME0, name0, 4) ||
@@ -440,7 +479,7 @@ int TC2(void)
int ret;
if (!quiet)
- printf("TC2: Single block message test for SHA-1.\n");
+ printf("TC2: Single block message test for SHA-1.\n");
/* Write block to SHA-1. */
tc_write(SHA1_ADDR_BLOCK, block, SHA1_BLOCK_LEN);
@@ -464,7 +503,7 @@ int TC3(void)
int ret;
if (!quiet)
- printf("TC3: Double block message test for SHA-1.\n");
+ printf("TC3: Double block message test for SHA-1.\n");
/* Write first block to SHA-1. */
tc_write(SHA1_ADDR_BLOCK, block[0], SHA1_BLOCK_LEN);
@@ -493,7 +532,7 @@ int TC4(void)
uint8_t version[4] = { 0x30, 0x2e, 0x38, 0x30 }; /* "0.80" */
if (!quiet)
- printf("TC4: Reading name, type and version words from SHA-256 core.\n");
+ printf("TC4: Reading name, type and version words from SHA-256 core.\n");
return
tc_expected(SHA256_ADDR_NAME0, name0, 4) ||
@@ -508,7 +547,7 @@ int TC5()
const uint8_t *expected = SHA256_SINGLE_DIGEST;
if (!quiet)
- printf("TC5: Single block message test for SHA-256.\n");
+ printf("TC5: Single block message test for SHA-256.\n");
return
/* Write block to SHA-256. */
@@ -532,7 +571,7 @@ int TC6()
const uint8_t *expected = SHA256_DOUBLE_DIGEST;
if (!quiet)
- printf("TC6: Double block message test for SHA-256.\n");
+ printf("TC6: Double block message test for SHA-256.\n");
return
/* Write first block to SHA-256. */
@@ -574,11 +613,11 @@ int TC7()
int i, n = 1000;
if (!quiet)
- printf("TC7: Message with %d blocks test for SHA-256.\n", n);
+ printf("TC7: Message with %d blocks test for SHA-256.\n", n);
/* Write block data to SHA-256. */
if (tc_write(SHA256_ADDR_BLOCK, block, SHA256_BLOCK_LEN))
- return 1;
+ return 1;
/* Start initial block hashing, wait and check status. */
if (tc_init(SHA256_ADDR_CTRL) ||
@@ -605,12 +644,12 @@ int TC7()
/* TC8: Read name and version from SHA-512 core. */
int TC8()
{
- uint8_t name0[4] = { 0x73, 0x68, 0x61, 0x32 }; /* "sha2" */
- uint8_t name1[4] = { 0x2d, 0x35, 0x31, 0x32 }; /* "-512" */
- uint8_t version[4] = { 0x30, 0x2e, 0x38, 0x30 }; /* "0.80" */
+ uint8_t name0[4] = { 0x73, 0x68, 0x61, 0x32 }; /* "sha2" */
+ uint8_t name1[4] = { 0x2d, 0x35, 0x31, 0x32 }; /* "-512" */
+ uint8_t version[4] = { 0x30, 0x2e, 0x38, 0x30 }; /* "0.80" */
if (!quiet)
- printf("TC8: Reading name, type and version words from SHA-512 core.\n");
+ printf("TC8: Reading name, type and version words from SHA-512 core.\n");
return
tc_expected(SHA512_ADDR_NAME0, name0, 4) ||
@@ -638,22 +677,22 @@ int tc9(int mode, const uint8_t *expected, int digest_len)
int TC9()
{
if (!quiet)
- printf("TC9-1: Single block message test for SHA-512/224.\n");
+ printf("TC9-1: Single block message test for SHA-512/224.\n");
if (tc9(MODE_SHA_512_224, SHA512_224_SINGLE_DIGEST, SHA512_224_DIGEST_LEN) != 0)
return 1;
if (!quiet)
- printf("TC9-2: Single block message test for SHA-512/256.\n");
+ printf("TC9-2: Single block message test for SHA-512/256.\n");
if (tc9(MODE_SHA_512_256, SHA512_256_SINGLE_DIGEST, SHA512_256_DIGEST_LEN) != 0)
return 1;
if (!quiet)
- printf("TC9-3: Single block message test for SHA-384.\n");
+ printf("TC9-3: Single block message test for SHA-384.\n");
if (tc9(MODE_SHA_384, SHA384_SINGLE_DIGEST, SHA384_DIGEST_LEN) != 0)
return 1;
if (!quiet)
- printf("TC9-4: Single block message test for SHA-512.\n");
+ printf("TC9-4: Single block message test for SHA-512.\n");
if (tc9(MODE_SHA_512, SHA512_SINGLE_DIGEST, SHA512_DIGEST_LEN) != 0)
return 1;
@@ -686,68 +725,31 @@ int tc10(int mode, const uint8_t *expected, int digest_len)
int TC10()
{
if (!quiet)
- printf("TC10-1: Double block message test for SHA-512/224.\n");
+ printf("TC10-1: Double block message test for SHA-512/224.\n");
if (tc10(MODE_SHA_512_224, SHA512_224_DOUBLE_DIGEST, SHA512_224_DIGEST_LEN) != 0)
return 1;
if (!quiet)
- printf("TC10-2: Double block message test for SHA-512/256.\n");
+ printf("TC10-2: Double block message test for SHA-512/256.\n");
if (tc10(MODE_SHA_512_256, SHA512_256_DOUBLE_DIGEST, SHA512_256_DIGEST_LEN) != 0)
return 1;
if (!quiet)
- printf("TC10-3: Double block message test for SHA-384.\n");
+ printf("TC10-3: Double block message test for SHA-384.\n");
if (tc10(MODE_SHA_384, SHA384_DOUBLE_DIGEST, SHA384_DIGEST_LEN) != 0)
return 1;
if (!quiet)
- printf("TC10-4: Double block message test for SHA-512.\n");
+ printf("TC10-4: Double block message test for SHA-512.\n");
if (tc10(MODE_SHA_512, SHA512_DOUBLE_DIGEST, SHA512_DIGEST_LEN) != 0)
return 1;
return 0;
}
-int TC11()
-{
- uint8_t board_type[4] = { 'P', 'V', 'T', '1'}; /* "PVT1" */
- uint8_t bitstream_ver[4] = { 0x00, 0x01, 0x00, 0x0B }; /* v0.1.0b */
- uint8_t t[4];
-
- uint8_t seg_rngs_reg_first[4] = { 0xAA, 0xAA, 0xAA, 0xAA};
- uint8_t seg_rngs_reg_second[4] = { 0xBB, 0xBB, 0xBB, 0xBB};
- uint8_t seg_rngs_reg_third[4] = { 0xCC, 0xCC, 0xCC, 0xCC};
-
- uint8_t seg_ciphers_reg_first[4] = { 0xDD, 0xDD, 0xDD, 0xDD};
- uint8_t seg_ciphers_reg_second[4] = { 0xEE, 0xEE, 0xEE, 0xEE};
- uint8_t seg_ciphers_reg_third[4] = { 0xFF, 0xFF, 0xFF, 0xFF};
-
- // write current time into dummy register, then try to read it back
- // to make sure that we can actually write something into eim
- (void)time((time_t *)t);
- tc_write(ADDR_GLOBAL_DUMMY_REG, (void *)&t, 4);
-
- if (!quiet)
- printf("TC11: Reading board type, bitstream version and dummy register from global registers.\n");
- if (!quiet)
- printf("TC11: Reading dummy registers from RNG and CIPHER memory segments.\n");
-
- return
- tc_expected(ADDR_GLOBAL_BOARD_TYPE, board_type, 4) ||
- tc_expected(ADDR_GLOBAL_BITSTREAM_VER, bitstream_ver, 4) ||
- tc_expected(ADDR_GLOBAL_DUMMY_REG, (void *)t, 4) ||
-
- tc_expected(SEGMENT_OFFSET_RNGS + (0 << 2), seg_rngs_reg_first, 4) ||
- tc_expected(SEGMENT_OFFSET_RNGS + (1 << 2), seg_rngs_reg_second, 4) ||
- tc_expected(SEGMENT_OFFSET_RNGS + (2 << 2), seg_rngs_reg_third, 4) ||
-
- tc_expected(SEGMENT_OFFSET_CIPHERS + (0 << 2), seg_ciphers_reg_first, 4) ||
- tc_expected(SEGMENT_OFFSET_CIPHERS + (1 << 2), seg_ciphers_reg_second, 4) ||
- tc_expected(SEGMENT_OFFSET_CIPHERS + (2 << 2), seg_ciphers_reg_third, 4);
-}
-
/* ---------------- main ---------------- */
+/* signal handler for ctrl-c to end repeat testing */
unsigned long iter = 0;
struct timeval tv_start, tv_end;
void sighandler(int unused)
@@ -756,19 +758,19 @@ void sighandler(int unused)
gettimeofday(&tv_end, NULL);
tv_diff = (double)(tv_end.tv_sec - tv_start.tv_sec) +
- (double)(tv_end.tv_usec - tv_start.tv_usec)/1000000;
+ (double)(tv_end.tv_usec - tv_start.tv_usec)/1000000;
printf("\n%lu iterations in %.3f seconds (%.3f iterations/sec)\n",
- iter, tv_diff, (double)iter/tv_diff);
- exit(0);
+ iter, tv_diff, (double)iter/tv_diff);
+ exit(EXIT_SUCCESS);
}
int main(int argc, char *argv[])
{
typedef int (*tcfp)(void);
+ tcfp all_tests[] = { TC0, TC1, TC2, TC3, TC4, TC5, TC6, TC7, TC8, TC9, TC10 };
tcfp sha1_tests[] = { TC1, TC2, TC3 };
tcfp sha256_tests[] = { TC4, TC5, TC6, TC7 };
tcfp sha512_tests[] = { TC8, TC9, TC10 };
- tcfp all_tests[] = { TC1, TC2, TC3, TC4, TC5, TC6, TC7, TC8, TC9, TC10, TC11 };
char *usage = "Usage: %s [-h] [-d] [-q] [-r] tc...\n";
int i, j, opt;
@@ -778,99 +780,97 @@ int main(int argc, char *argv[])
case 'h':
case '?':
printf(usage, argv[0]);
- return 0;
+ return EXIT_SUCCESS;
case 'd':
debug = 1;
break;
- case 'q':
- quiet = 1;
- break;
- case 'r':
- repeat = 1;
- break;
+ case 'q':
+ quiet = 1;
+ break;
+ case 'r':
+ repeat = 1;
+ break;
default:
fprintf(stderr, usage, argv[0]);
- return 1;
+ return EXIT_FAILURE;
}
}
- // try to setup eim (return value should be 1)
- printf("Configuring EIM .. ");
- if (eim_setup() < 1) {
- printf("ERROR\n");
- return EXIT_FAILURE;
- }
- else {
- printf("EIM Setup ok.\n");
+ /* set up EIM */
+ if (eim_setup() != 0) {
+ fprintf(stderr, "EIM setup failed\n");
+ return EXIT_FAILURE;
}
+ /* repeat one test until interrupted */
if (repeat) {
- tcfp tc;
- if (optind != argc - 1) {
- fprintf(stderr, "only one test case can be repeated\n");
- return 1;
- }
- j = atoi(argv[optind]);
- if (j <= 0 || j > sizeof(all_tests)/sizeof(all_tests[0])) {
- fprintf(stderr, "invalid test number %s\n", argv[optind]);
- return 1;
- }
- tc = (all_tests[j - 1]);
- srand(time(NULL));
- signal(SIGINT, sighandler);
- gettimeofday(&tv_start, NULL);
- while (1) {
- ++iter;
- if ((iter & 0xffff) == 0) {
- printf(".");
- fflush(stdout);
- }
- if (tc() != 0)
- sighandler(0);
- }
- return 0; /*NOTREACHED*/
+ tcfp tc;
+ if (optind != argc - 1) {
+ fprintf(stderr, "only one test case can be repeated\n");
+ return EXIT_FAILURE;
+ }
+ j = atoi(argv[optind]);
+ if (j < 0 || j >= sizeof(all_tests)/sizeof(all_tests[0])) {
+ fprintf(stderr, "invalid test number %s\n", argv[optind]);
+ return EXIT_FAILURE;
+ }
+ tc = (all_tests[j]);
+ srand(time(NULL));
+ signal(SIGINT, sighandler);
+ gettimeofday(&tv_start, NULL);
+ while (1) {
+ ++iter;
+ if ((iter & 0xffff) == 0) {
+ printf(".");
+ fflush(stdout);
+ }
+ if (tc() != 0)
+ sighandler(0);
+ }
+ return EXIT_SUCCESS; /*NOTREACHED*/
}
/* no args == run all tests */
if (optind >= argc) {
for (j = 0; j < sizeof(all_tests)/sizeof(all_tests[0]); ++j)
if (all_tests[j]() != 0)
- return 1;
- return 0;
+ return EXIT_FAILURE;
+ return EXIT_SUCCESS;
}
+ /* run one or more tests (by number) or groups of tests (by name) */
for (i = optind; i < argc; ++i) {
- if (strcmp(argv[i], "sha1") == 0) {
+ if (strcmp(argv[i], "all") == 0) {
+ for (j = 0; j < sizeof(all_tests)/sizeof(all_tests[0]); ++j)
+ if (all_tests[j]() != 0)
+ return EXIT_FAILURE;
+ }
+ else if (strcmp(argv[i], "sha1") == 0) {
for (j = 0; j < sizeof(sha1_tests)/sizeof(sha1_tests[0]); ++j)
if (sha1_tests[j]() != 0)
- return 1;
+ return EXIT_FAILURE;
}
else if (strcmp(argv[i], "sha256") == 0) {
for (j = 0; j < sizeof(sha256_tests)/sizeof(sha256_tests[0]); ++j)
if (sha256_tests[j]() != 0)
- return 1;
+ return EXIT_FAILURE;
}
else if (strcmp(argv[i], "sha512") == 0) {
for (j = 0; j < sizeof(sha512_tests)/sizeof(sha512_tests[0]); ++j)
if (sha512_tests[j]() != 0)
- return 1;
- }
- else if (strcmp(argv[i], "all") == 0) {
- for (j = 0; j < sizeof(all_tests)/sizeof(all_tests[0]); ++j)
- if (all_tests[j]() != 0)
- return 1;
+ return EXIT_FAILURE;
}
else if (isdigit(argv[i][0]) &&
- (((j = atoi(argv[i])) > 0) &&
- (j <= sizeof(all_tests)/sizeof(all_tests[0])))) {
- if (all_tests[j - 1]() != 0)
- return 1;
+ (((j = atoi(argv[i])) >= 0) &&
+ (j < sizeof(all_tests)/sizeof(all_tests[0])))) {
+ if (all_tests[j]() != 0)
+ return EXIT_FAILURE;
}
else {
fprintf(stderr, "unknown test case %s\n", argv[i]);
- return 1;
+ return EXIT_FAILURE;
}
}
- return 0;
+ return EXIT_SUCCESS;
}
diff --git a/sw/novena-eim.c b/sw/novena-eim.c
index 1effff1..9b3d236 100644
--- a/sw/novena-eim.c
+++ b/sw/novena-eim.c
@@ -1,407 +1,699 @@
-//------------------------------------------------------------------------------
-// novena-eim.c
-//------------------------------------------------------------------------------
-
-
-//------------------------------------------------------------------------------
-// Headers
-//------------------------------------------------------------------------------
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdint.h>
-#include <sys/mman.h>
-#include "novena-eim.h"
-
-
-//------------------------------------------------------------------------------
-// Variables
-//------------------------------------------------------------------------------
-static long mem_page_size = 0;
-static int mem_dev_fd = -1;
-static void * mem_map_ptr = MAP_FAILED;
-static off_t mem_base_addr = 0;
-
-
-//------------------------------------------------------------------------------
-int eim_setup()
-//------------------------------------------------------------------------------
-{
- // register cleanup function
- int ok = atexit(_eim_cleanup);
- if (ok != 0)
- { printf("ERROR: atexit() failed.\n");
- return -1;
- }
-
- // determine memory page size to use in mmap()
- mem_page_size = sysconf(_SC_PAGESIZE);
- if (mem_page_size < 1)
- { printf("ERROR: sysconf(_SC_PAGESIZE) == %ld\n", mem_page_size);
- return -1;
- }
-
- // try to open memory device
- mem_dev_fd = open(MEMORY_DEVICE, O_RDWR | O_SYNC);
- if (mem_dev_fd == -1)
- { printf("ERROR: open(%s) failed.\n", MEMORY_DEVICE);
- return -1;
- }
-
- /* Several blocks in the CPU have common pins, we can use I/O MUX Controller
- * to configure what block will actually use I/O pins. We wait EIM module to be able
- * to communicate with the on-board FPGA. Let's configure IOMUXC accordingly.
- */
- _eim_setup_iomuxc();
-
- /* We need to enable clocking of EIM block in order to be able to use it.
- * Let's configure Clock Controller Module accordingly.
- */
- _eim_setup_ccm();
-
- /* We need to properly configure EIM mode and all the corresponding parameters.
- * That's a lot of code, let's do it now.
- */
- _eim_setup_eim();
-
-
- // done
- return 1;
-}
-
-
-//------------------------------------------------------------------------------
-void _eim_cleanup()
-//------------------------------------------------------------------------------
-{
- // unmap memory if needed
- if (mem_map_ptr != MAP_FAILED)
- { int ok = munmap(mem_map_ptr, mem_page_size);
- if (ok != 0) printf("WARNING: munmap() failed.\n");
- }
-
- // close memory device if needed
- if (mem_dev_fd != -1)
- { int ok = close(mem_dev_fd);
- if (ok != 0) printf("WARNING: close() failed.\n");
- }
-}
-
-
-//------------------------------------------------------------------------------
-void _eim_setup_iomuxc()
-//------------------------------------------------------------------------------
-{
- // create structures
- struct IOMUXC_SW_MUX_CTL_PAD_EIM reg_mux; // mux control register
- struct IOMUXC_SW_PAD_CTL_PAD_EIM reg_pad; // pad control register
-
- // setup mux control register
- reg_mux.mux_mode = IOMUXC_MUX_MODE_ALT0; // ALT0 mode must be used for EIM
- reg_mux.sion = 0; // forced input not needed
- reg_mux.reserved_3 = 0; // must be 0
- reg_mux.reserved_31_5 = 0; // must be 0
-
- // setup pad control register
- reg_pad.sre = IOMUXC_PAD_CTL_SRE_FAST; // fast slew rate
- reg_pad.dse = IOMUXC_PAD_CTL_DSE_33_OHM; // highest drive strength
- reg_pad.speed = IOMUXC_PAD_CTL_SPEED_MEDIUM_10; // medium speed
- reg_pad.ode = IOMUXC_PAD_CTL_ODE_DISABLED; // open drain not needed
- reg_pad.pke = IOMUXC_PAD_CTL_PKE_DISABLED; // neither pull nor keeper are needed
- reg_pad.pue = IOMUXC_PAD_CTL_PUE_PULL; // doesn't matter actually, because PKE is disabled
- reg_pad.pus = IOMUXC_PAD_CTL_PUS_100K_OHM_PU; // doesn't matter actually, because PKE is disabled
- reg_pad.hys = IOMUXC_PAD_CTL_HYS_DISABLED; // use CMOS, not Schmitt trigger input
- reg_pad.reserved_2_1 = 0; // must be 0
- reg_pad.reserved_10_8 = 0; // must be 0
- reg_pad.reserved_31_17 = 0; // must be 0
-
- // all the pins must be configured to use the same ALT0 mode
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_CS0_B, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_OE_B, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_RW, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_LBA_B, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD00, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD01, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD02, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD03, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD04, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD05, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD06, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD07, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD08, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD09, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD10, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD11, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD12, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD13, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD14, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD15, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_WAIT_B, (uint32_t *)&reg_mux);
- eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_BCLK, (uint32_t *)&reg_mux);
-
- // we need to configure all the I/O pads too
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_CS0_B, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_OE_B, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_RW, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_LBA_B, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD00, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD01, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD02, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD03, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD04, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD05, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD06, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD07, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD08, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD09, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD10, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD11, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD12, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD13, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD14, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD15, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_WAIT_B, (uint32_t *)&reg_pad);
- eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_BCLK, (uint32_t *)&reg_pad);
-}
-
-
-//------------------------------------------------------------------------------
-void _eim_setup_ccm()
-//------------------------------------------------------------------------------
-{
- // create structure
- struct CCM_CCGR6 ccm_ccgr6;
-
- // read register
- eim_read_32(CCM_CCGR6, (uint32_t *)&ccm_ccgr6);
-
- // modify register
- ccm_ccgr6.cg0_usboh3 = CCM_CGR_ON_EXCEPT_STOP;
- ccm_ccgr6.cg1_usdhc1 = CCM_CGR_OFF;
- ccm_ccgr6.cg2_usdhc2 = CCM_CGR_ON_EXCEPT_STOP;
- ccm_ccgr6.cg3_usdhc3 = CCM_CGR_ON_EXCEPT_STOP;
-
- ccm_ccgr6.cg3_usdhc4 = CCM_CGR_OFF;
- ccm_ccgr6.cg5_eim_slow = CCM_CGR_ON_EXCEPT_STOP;
- ccm_ccgr6.cg6_vdoaxiclk = CCM_CGR_OFF;
- ccm_ccgr6.cg7_vpu = CCM_CGR_OFF;
-
- ccm_ccgr6.cg8_reserved = 0;
- ccm_ccgr6.cg9_reserved = 0;
- ccm_ccgr6.cg10_reserved = 0;
- ccm_ccgr6.cg11_reserved = 0;
- ccm_ccgr6.cg12_reserved = 0;
- ccm_ccgr6.cg13_reserved = 0;
- ccm_ccgr6.cg14_reserved = 0;
- ccm_ccgr6.cg15_reserved = 0;
-
- // write register
- eim_write_32(CCM_CCGR6, (uint32_t *)&ccm_ccgr6);
-}
-
-
-//------------------------------------------------------------------------------
-void _eim_setup_eim()
-//------------------------------------------------------------------------------
-{
- // create structures
- struct EIM_CS_GCR1 gcr1;
- struct EIM_CS_GCR2 gcr2;
- struct EIM_CS_RCR1 rcr1;
- struct EIM_CS_RCR2 rcr2;
- struct EIM_CS_WCR1 wcr1;
- struct EIM_CS_WCR2 wcr2;
-
- struct EIM_WCR wcr;
- struct EIM_WIAR wiar;
- struct EIM_EAR ear;
-
- // read all the registers
- eim_read_32(EIM_CS0GCR1, (uint32_t *)&gcr1);
- eim_read_32(EIM_CS0GCR2, (uint32_t *)&gcr2);
- eim_read_32(EIM_CS0RCR1, (uint32_t *)&rcr1);
- eim_read_32(EIM_CS0RCR2, (uint32_t *)&rcr2);
- eim_read_32(EIM_CS0WCR1, (uint32_t *)&wcr1);
- eim_read_32(EIM_CS0WCR2, (uint32_t *)&wcr2);
-
- eim_read_32(EIM_WCR, (uint32_t *)&wcr);
- eim_read_32(EIM_WIAR, (uint32_t *)&wiar);
- eim_read_32(EIM_EAR, (uint32_t *)&ear);
-
- // manipulate registers as needed
- gcr1.csen = 1; // chip select is enabled |
- gcr1.swr = 1; // write is sync |
- gcr1.srd = 1; // read is sync |
- gcr1.mum = 1; // address and data are multiplexed |
- gcr1.wfl = 0; // write latency is not fixed |
- gcr1.rfl = 0; // read latency is not fixed |
- gcr1.cre = 0; // CRE signal not needed |
- //gcr1.crep = x; // don't care, CRE not used |
- gcr1.bl = 4; // burst length | ?
- gcr1.wc = 0; // write is not continuous | ?
- gcr1.bcd = 3; // BCLK divisor is 3+1=4 |
- gcr1.bcs = 1; // delay from ~CS to BCLK is 1 cycle |
- gcr1.dsz = 1; // 16 bits per databeat at DATA[15:0] |
- gcr1.sp = 0; // supervisor protection is disabled |
- gcr1.csrec = 1; // ~CS recovery is 1 cycle |
- gcr1.aus = 1; // address is not shifted |
- gcr1.gbc = 1; // ~CS gap is 1 cycle |
- gcr1.wp = 0; // write protection is not enabled |
- //gcr1.psz = x; // don't care, page mode is not used |
-
- gcr2.adh = 0; // address hold duration is 1 cycle |
- //gcr2.daps = x; // don't care, DTACK is not used |
- gcr2.dae = 0; // DTACK is not used |
- //gcr2.dap = x; // don't care, DTACK is not used |
- gcr2.mux16_byp_grant = 1; // enable grant mechanism | ?
- gcr2.reserved_3_2 = 0; // must be 0 |
- gcr2.reserved_11_10 = 0; // must be 0 |
- gcr2.reserved_31_13 = 0; // must be 0 |
-
- //rcr1.rcsn = x; // don't care in sync mode |
- rcr1.rcsa = 0; // no delay for ~CS needed |
- //rcr1.oen = x; // don't care in sync mode |
- rcr1.oea = 0; // no delay for ~OE needed |
- rcr1.radvn = 0; // no delay for ~LBA needed |
- rcr1.ral = 0; // clear ~LBA when needed |
- rcr1.radva = 0; // no delay for ~LBA needed |
- rcr1.rwsc = 1; // one wait state |
- rcr1.reserved_3 = 0; // must be 0 |
- rcr1.reserved_7 = 0; // must be 0 |
- rcr1.reserved_11 = 0; // must be 0 |
- rcr1.reserved_15 = 0; // must be 0 |
- rcr1.reserved_23 = 0; // must be 0 |
- rcr1.reserved_31_30 = 0; // must be 0 |
-
- //rcr2.rben = x; // don't care in sync mode |
- rcr2.rbe = 0; // BE is disabled |
- //rcr2.rbea = x; // don't care when BE is not used |
- rcr2.rl = 0; // read latency is 0 | ?
- //rcr2.pat = x; // don't care when page read is not used |
- rcr2.apr = 0; // page read mode is not used |
- rcr2.reserved_7 = 0; // must be 0 |
- rcr2.reserved_11_10 = 0; // must be 0 |
- rcr2.reserved_31_16 = 0; // must be 0 |
-
- //wcr1.wcsn = x; // don't care in sync mode |
- wcr1.wcsa = 0; // no delay for ~CS needed |
- //wcr1.wen = x; // don't care in sync mode |
- wcr1.wea = 0; // no delay for ~WR_N needed |
- //wcr1.wben = x; // don't care in sync mode |
- //wcr1.wbea = x; // don't care in sync mode |
- wcr1.wadvn = 0; // no delay for ~LBA needed |
- wcr1.wadva = 0; // no delay for ~LBA needed |
- wcr1.wwsc = 1; // no wait state in needed |
- wcr1.wbed = 1; // BE is disabled |
- wcr1.wal = 0; // clear ~LBA when needed |
-
- wcr2.wbcdd = 0; // write clock division is not needed |
- wcr2.reserved_31_1 = 0; // must be 0 |
-
- wcr.bcm = 0; // clock is only active during access |
- //wcr.gbcd = x; // don't care when BCM=0 |
- wcr.inten = 0; // interrupt is not used |
- //wcr.intpol = x; // don't care when interrupt is not used |
- wcr.wdog_en = 1; // watchdog is enabled |
- wcr.wdog_limit = 00; // timeout is 128 BCLK cycles |
- wcr.reserved_3 = 0; // must be 0 |
- wcr.reserved_7_6 = 0; // must be 0 |
- wcr.reserved_31_11 = 0; // must be 0 |
-
- wiar.ips_req = 0; // IPS not needed |
- wiar.ips_ack = 0; // IPS not needed |
- //wiar.irq = x; // don't touch |
- //wiar.errst = x; // don't touch |
- wiar.aclk_en = 1; // clock is enabled |
- wiar.reserved_31_5 = 0; // must be 0 |
-
- //ear.error_addr = x; // read-only |
-
- // write modified registers
- eim_write_32(EIM_CS0GCR1, (uint32_t *)&gcr1);
- eim_write_32(EIM_CS0GCR2, (uint32_t *)&gcr2);
- eim_write_32(EIM_CS0RCR1, (uint32_t *)&rcr1);
- eim_write_32(EIM_CS0RCR2, (uint32_t *)&rcr2);
- eim_write_32(EIM_CS0WCR1, (uint32_t *)&wcr1);
- eim_write_32(EIM_CS0WCR2, (uint32_t *)&wcr2);
- eim_write_32(EIM_WCR, (uint32_t *)&wcr);
- eim_write_32(EIM_WIAR, (uint32_t *)&wiar);/*
- eim_write_32(EIM_EAR, (uint32_t *)&ear);*/
-}
-
-
-//------------------------------------------------------------------------------
-void eim_write_32(off_t offset, uint32_t *pvalue)
-//------------------------------------------------------------------------------
-{
- // calculate memory offset
- uint32_t *ptr = (uint32_t *)_eim_calc_offset(offset);
-
- // write data to memory
- memcpy(ptr, pvalue, sizeof(uint32_t));
-}
-
-//------------------------------------------------------------------------------
-void eim_read_32(off_t offset, uint32_t *pvalue)
-//------------------------------------------------------------------------------
-{
- // calculate memory offset
- uint32_t *ptr = (uint32_t *)_eim_calc_offset(offset);
-
- // read data from memory
- memcpy(pvalue, ptr, sizeof(uint32_t));
-}
-
-
-//------------------------------------------------------------------------------
-off_t _eim_calc_offset(off_t offset)
-//------------------------------------------------------------------------------
-{
- // make sure that memory is mapped
- if (mem_map_ptr == MAP_FAILED) _eim_remap_mem(offset);
-
- // calculate starting and ending addresses of currently mapped page
- off_t offset_low = mem_base_addr;
- off_t offset_high = mem_base_addr + (mem_page_size - 1);
-
- // check that offset is in currently mapped page, remap new page otherwise
- if ((offset < offset_low) || (offset > offset_high)) _eim_remap_mem(offset);
-
- // calculate pointer
- return (off_t)mem_map_ptr + (offset - mem_base_addr);
-}
-
-
-//------------------------------------------------------------------------------
-void _eim_remap_mem(off_t offset)
-//------------------------------------------------------------------------------
-{
- // unmap old memory page if needed
- if (mem_map_ptr != MAP_FAILED)
- { int ok = munmap(mem_map_ptr, mem_page_size);
- if (ok != 0)
- { printf("ERROR: munmap() failed.\n");
- exit(EXIT_FAILURE);
- }
- }
-
- // calculate starting address of new page
- while (offset % mem_page_size) offset--;
-
- // try to map new memory page
- mem_map_ptr = mmap(NULL, mem_page_size, PROT_READ | PROT_WRITE, MAP_SHARED, mem_dev_fd, offset);
- if (mem_map_ptr == MAP_FAILED)
- { printf("ERROR: mmap() failed.\n");
- exit(EXIT_FAILURE);
- }
-
- // save last mapped page address
- mem_base_addr = offset;
-}
-
-
-//------------------------------------------------------------------------------
-// End-of-File
-//------------------------------------------------------------------------------
+/*
+ * novena-eim.c
+ * ------------
+ * This module contains the userland magic to set up and use the EIM bus.
+ *
+ *
+ * Author: Pavel Shatov
+ * Copyright (c) 2014-2015, NORDUnet A/S All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of the NORDUnet nor the names of its contributors may
+ * be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+//------------------------------------------------------------------------------
+// Headers
+//------------------------------------------------------------------------------
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <sys/mman.h>
+
+#include "novena-eim.h"
+
+
+//------------------------------------------------------------------------------
+// Defines
+//------------------------------------------------------------------------------
+#define MEMORY_DEVICE "/dev/mem"
+
+#define IOMUXC_MUX_MODE_ALT0 0 // 000
+
+#define IOMUXC_PAD_CTL_SRE_FAST 1 // 1
+#define IOMUXC_PAD_CTL_DSE_33_OHM 7 // 111
+#define IOMUXC_PAD_CTL_SPEED_MEDIUM_10 2 // 10
+#define IOMUXC_PAD_CTL_ODE_DISABLED 0 // 0
+#define IOMUXC_PAD_CTL_PKE_DISABLED 0 // 0
+#define IOMUXC_PAD_CTL_PUE_PULL 1 // 1
+#define IOMUXC_PAD_CTL_PUS_100K_OHM_PU 2 // 10
+#define IOMUXC_PAD_CTL_HYS_DISABLED 0 // 0
+
+#define CCM_CGR_OFF 0 // 00
+#define CCM_CGR_ON_EXCEPT_STOP 3 // 11
+
+
+//------------------------------------------------------------------------------
+// CPU Registers
+//------------------------------------------------------------------------------
+enum IMX6DQ_REGISTER_OFFSET
+{
+ IOMUXC_SW_MUX_CTL_PAD_EIM_CS0_B = 0x020E00F8,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_OE_B = 0x020E0100,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_RW = 0x020E0104,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_LBA_B = 0x020E0108,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD00 = 0x020E0114,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD01 = 0x020E0118,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD02 = 0x020E011C,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD03 = 0x020E0120,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD04 = 0x020E0124,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD05 = 0x020E0128,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD06 = 0x020E012C,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD07 = 0x020E0130,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD08 = 0x020E0134,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD09 = 0x020E0138,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD10 = 0x020E013C,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD11 = 0x020E0140,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD12 = 0x020E0144,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD13 = 0x020E0148,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD14 = 0x020E014C,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_AD15 = 0x020E0150,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_WAIT_B = 0x020E0154,
+ IOMUXC_SW_MUX_CTL_PAD_EIM_BCLK = 0x020E0158,
+
+ IOMUXC_SW_PAD_CTL_PAD_EIM_CS0_B = 0x020E040C,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_OE_B = 0x020E0414,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_RW = 0x020E0418,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_LBA_B = 0x020E041C,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD00 = 0x020E0428,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD01 = 0x020E042C,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD02 = 0x020E0430,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD03 = 0x020E0434,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD04 = 0x020E0438,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD05 = 0x020E043C,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD06 = 0x020E0440,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD07 = 0x020E0444,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD08 = 0x020E0448,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD09 = 0x020E044C,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD10 = 0x020E0450,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD11 = 0x020E0454,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD12 = 0x020E0458,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD13 = 0x020E045C,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD14 = 0x020E0460,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_AD15 = 0x020E0464,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_WAIT_B = 0x020E0468,
+ IOMUXC_SW_PAD_CTL_PAD_EIM_BCLK = 0x020E046C,
+
+ CCM_CCGR6 = 0x020C4080,
+
+ EIM_CS0GCR1 = 0x021B8000,
+ EIM_CS0GCR2 = 0x021B8004,
+ EIM_CS0RCR1 = 0x021B8008,
+ EIM_CS0RCR2 = 0x021B800C,
+ EIM_CS0WCR1 = 0x021B8010,
+ EIM_CS0WCR2 = 0x021B8014,
+
+ EIM_WCR = 0x021B8090,
+ EIM_WIAR = 0x021B8094,
+ EIM_EAR = 0x021B8098,
+
+};
+
+
+//------------------------------------------------------------------------------
+// Structures
+//------------------------------------------------------------------------------
+struct IOMUXC_SW_MUX_CTL_PAD_EIM
+{
+ uint32_t mux_mode : 3;
+ uint32_t reserved_3 : 1;
+ uint32_t sion : 1;
+ uint32_t reserved_31_5 : 27;
+};
+
+struct IOMUXC_SW_PAD_CTL_PAD_EIM
+{
+ uint32_t sre : 1;
+ uint32_t reserved_2_1 : 2;
+ uint32_t dse : 3;
+ uint32_t speed : 2;
+ uint32_t reserved_10_8 : 3;
+ uint32_t ode : 1;
+ uint32_t pke : 1;
+ uint32_t pue : 1;
+ uint32_t pus : 2;
+ uint32_t hys : 1;
+ uint32_t reserved_31_17 : 15;
+};
+
+struct CCM_CCGR6
+{
+ uint32_t cg0_usboh3 : 2;
+ uint32_t cg1_usdhc1 : 2;
+ uint32_t cg2_usdhc2 : 2;
+ uint32_t cg3_usdhc3 : 2;
+
+ uint32_t cg3_usdhc4 : 2;
+ uint32_t cg5_eim_slow : 2;
+ uint32_t cg6_vdoaxiclk : 2;
+ uint32_t cg7_vpu : 2;
+
+ uint32_t cg8_reserved : 2;
+ uint32_t cg9_reserved : 2;
+ uint32_t cg10_reserved : 2;
+ uint32_t cg11_reserved : 2;
+
+ uint32_t cg12_reserved : 2;
+ uint32_t cg13_reserved : 2;
+ uint32_t cg14_reserved : 2;
+ uint32_t cg15_reserved : 2;
+};
+
+struct EIM_CS_GCR1
+{
+ uint32_t csen : 1;
+ uint32_t swr : 1;
+ uint32_t srd : 1;
+ uint32_t mum : 1;
+ uint32_t wfl : 1;
+ uint32_t rfl : 1;
+ uint32_t cre : 1;
+ uint32_t crep : 1;
+ uint32_t bl : 3;
+ uint32_t wc : 1;
+ uint32_t bcd : 2;
+ uint32_t bcs : 2;
+ uint32_t dsz : 3;
+ uint32_t sp : 1;
+ uint32_t csrec : 3;
+ uint32_t aus : 1;
+ uint32_t gbc : 3;
+ uint32_t wp : 1;
+ uint32_t psz : 4;
+};
+
+struct EIM_CS_GCR2
+{
+ uint32_t adh : 2;
+ uint32_t reserved_3_2 : 2;
+ uint32_t daps : 4;
+ uint32_t dae : 1;
+ uint32_t dap : 1;
+ uint32_t reserved_11_10 : 2;
+ uint32_t mux16_byp_grant : 1;
+ uint32_t reserved_31_13 : 19;
+};
+
+struct EIM_CS_RCR1
+{
+ uint32_t rcsn : 3;
+ uint32_t reserved_3 : 1;
+ uint32_t rcsa : 3;
+ uint32_t reserved_7 : 1;
+ uint32_t oen : 3;
+ uint32_t reserved_11 : 1;
+ uint32_t oea : 3;
+ uint32_t reserved_15 : 1;
+ uint32_t radvn : 3;
+ uint32_t ral : 1;
+ uint32_t radva : 3;
+ uint32_t reserved_23 : 1;
+ uint32_t rwsc : 6;
+ uint32_t reserved_31_30 : 2;
+};
+
+struct EIM_CS_RCR2
+{
+ uint32_t rben : 3;
+ uint32_t rbe : 1;
+ uint32_t rbea : 3;
+ uint32_t reserved_7 : 1;
+ uint32_t rl : 2;
+ uint32_t reserved_11_10 : 2;
+ uint32_t pat : 3;
+ uint32_t apr : 1;
+ uint32_t reserved_31_16 : 16;
+};
+
+struct EIM_CS_WCR1
+{
+ uint32_t wcsn : 3;
+ uint32_t wcsa : 3;
+ uint32_t wen : 3;
+ uint32_t wea : 3;
+ uint32_t wben : 3;
+ uint32_t wbea : 3;
+ uint32_t wadvn : 3;
+ uint32_t wadva : 3;
+ uint32_t wwsc : 6;
+ uint32_t wbed : 1;
+ uint32_t wal : 1;
+};
+
+struct EIM_CS_WCR2
+{
+ uint32_t wbcdd : 1;
+ uint32_t reserved_31_1 : 31;
+};
+
+struct EIM_WCR
+{
+ uint32_t bcm : 1;
+ uint32_t gbcd : 2;
+ uint32_t reserved_3 : 1;
+ uint32_t inten : 1;
+ uint32_t intpol : 1;
+ uint32_t reserved_7_6 : 2;
+ uint32_t wdog_en : 1;
+ uint32_t wdog_limit : 2;
+ uint32_t reserved_31_11 : 21;
+};
+
+struct EIM_WIAR
+{
+ uint32_t ips_req : 1;
+ uint32_t ips_ack : 1;
+ uint32_t irq : 1;
+ uint32_t errst : 1;
+ uint32_t aclk_en : 1;
+ uint32_t reserved_31_5 : 27;
+};
+
+struct EIM_EAR
+{
+ uint32_t error_addr : 32;
+};
+
+
+//------------------------------------------------------------------------------
+// Variables
+//------------------------------------------------------------------------------
+static long mem_page_size = 0;
+static int mem_dev_fd = -1;
+static void * mem_map_ptr = MAP_FAILED;
+static off_t mem_base_addr = 0;
+
+//------------------------------------------------------------------------------
+// Prototypes
+//------------------------------------------------------------------------------
+static void _eim_setup_iomuxc (void);
+static void _eim_setup_ccm (void);
+static void _eim_setup_eim (void);
+static void _eim_cleanup (void);
+static off_t _eim_calc_offset (off_t);
+static void _eim_remap_mem (off_t);
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+int eim_setup(void)
+{
+ // register cleanup function
+ if (atexit(_eim_cleanup) != 0) {
+ fprintf(stderr, "ERROR: atexit() failed.\n");
+ return -1;
+ }
+
+ // determine memory page size to use in mmap()
+ mem_page_size = sysconf(_SC_PAGESIZE);
+ if (mem_page_size < 1) {
+ fprintf(stderr, "ERROR: sysconf(_SC_PAGESIZE) == %ld\n", mem_page_size);
+ return -1;
+ }
+
+ // try to open memory device
+ mem_dev_fd = open(MEMORY_DEVICE, O_RDWR | O_SYNC);
+ if (mem_dev_fd == -1) {
+ fprintf(stderr, "ERROR: open(%s) failed.\n", MEMORY_DEVICE);
+ return -1;
+ }
+
+ /* Several blocks in the CPU have common pins, we can use I/O MUX Controller
+ * to configure what block will actually use I/O pins. We wait EIM module to be able
+ * to communicate with the on-board FPGA. Let's configure IOMUXC accordingly.
+ */
+ _eim_setup_iomuxc();
+
+ /* We need to enable clocking of EIM block in order to be able to use it.
+ * Let's configure Clock Controller Module accordingly.
+ */
+ _eim_setup_ccm();
+
+ /* We need to properly configure EIM mode and all the corresponding parameters.
+ * That's a lot of code, let's do it now.
+ */
+ _eim_setup_eim();
+
+ // done
+ return 0;
+}
+
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+static void _eim_cleanup(void)
+{
+ // unmap memory if needed
+ if (mem_map_ptr != MAP_FAILED)
+ if (munmap(mem_map_ptr, mem_page_size) != 0)
+ fprintf(stderr, "WARNING: munmap() failed.\n");
+
+ // close memory device if needed
+ if (mem_dev_fd != -1)
+ if (close(mem_dev_fd) != 0)
+ fprintf(stderr, "WARNING: close() failed.\n");
+}
+
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+static void _eim_setup_iomuxc(void)
+{
+ // create structures
+ struct IOMUXC_SW_MUX_CTL_PAD_EIM reg_mux; // mux control register
+ struct IOMUXC_SW_PAD_CTL_PAD_EIM reg_pad; // pad control register
+
+ // setup mux control register
+ reg_mux.mux_mode = IOMUXC_MUX_MODE_ALT0; // ALT0 mode must be used for EIM
+ reg_mux.sion = 0; // forced input not needed
+ reg_mux.reserved_3 = 0; // must be 0
+ reg_mux.reserved_31_5 = 0; // must be 0
+
+ // setup pad control register
+ reg_pad.sre = IOMUXC_PAD_CTL_SRE_FAST; // fast slew rate
+ reg_pad.dse = IOMUXC_PAD_CTL_DSE_33_OHM; // highest drive strength
+ reg_pad.speed = IOMUXC_PAD_CTL_SPEED_MEDIUM_10; // medium speed
+ reg_pad.ode = IOMUXC_PAD_CTL_ODE_DISABLED; // open drain not needed
+ reg_pad.pke = IOMUXC_PAD_CTL_PKE_DISABLED; // neither pull nor keeper are needed
+ reg_pad.pue = IOMUXC_PAD_CTL_PUE_PULL; // doesn't matter actually, because PKE is disabled
+ reg_pad.pus = IOMUXC_PAD_CTL_PUS_100K_OHM_PU; // doesn't matter actually, because PKE is disabled
+ reg_pad.hys = IOMUXC_PAD_CTL_HYS_DISABLED; // use CMOS, not Schmitt trigger input
+ reg_pad.reserved_2_1 = 0; // must be 0
+ reg_pad.reserved_10_8 = 0; // must be 0
+ reg_pad.reserved_31_17 = 0; // must be 0
+
+ // all the pins must be configured to use the same ALT0 mode
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_CS0_B, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_OE_B, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_RW, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_LBA_B, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD00, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD01, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD02, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD03, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD04, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD05, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD06, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD07, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD08, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD09, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD10, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD11, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD12, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD13, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD14, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_AD15, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_WAIT_B, (uint32_t *)&reg_mux);
+ eim_write_32(IOMUXC_SW_MUX_CTL_PAD_EIM_BCLK, (uint32_t *)&reg_mux);
+
+ // we need to configure all the I/O pads too
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_CS0_B, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_OE_B, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_RW, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_LBA_B, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD00, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD01, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD02, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD03, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD04, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD05, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD06, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD07, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD08, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD09, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD10, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD11, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD12, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD13, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD14, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_AD15, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_WAIT_B, (uint32_t *)&reg_pad);
+ eim_write_32(IOMUXC_SW_PAD_CTL_PAD_EIM_BCLK, (uint32_t *)&reg_pad);
+}
+
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+static void _eim_setup_ccm(void)
+{
+ // create structure
+ struct CCM_CCGR6 ccm_ccgr6;
+
+ // read register
+ eim_read_32(CCM_CCGR6, (uint32_t *)&ccm_ccgr6);
+
+ // modify register
+ ccm_ccgr6.cg0_usboh3 = CCM_CGR_ON_EXCEPT_STOP;
+ ccm_ccgr6.cg1_usdhc1 = CCM_CGR_OFF;
+ ccm_ccgr6.cg2_usdhc2 = CCM_CGR_ON_EXCEPT_STOP;
+ ccm_ccgr6.cg3_usdhc3 = CCM_CGR_ON_EXCEPT_STOP;
+
+ ccm_ccgr6.cg3_usdhc4 = CCM_CGR_OFF;
+ ccm_ccgr6.cg5_eim_slow = CCM_CGR_ON_EXCEPT_STOP;
+ ccm_ccgr6.cg6_vdoaxiclk = CCM_CGR_OFF;
+ ccm_ccgr6.cg7_vpu = CCM_CGR_OFF;
+
+ ccm_ccgr6.cg8_reserved = 0;
+ ccm_ccgr6.cg9_reserved = 0;
+ ccm_ccgr6.cg10_reserved = 0;
+ ccm_ccgr6.cg11_reserved = 0;
+ ccm_ccgr6.cg12_reserved = 0;
+ ccm_ccgr6.cg13_reserved = 0;
+ ccm_ccgr6.cg14_reserved = 0;
+ ccm_ccgr6.cg15_reserved = 0;
+
+ // write register
+ eim_write_32(CCM_CCGR6, (uint32_t *)&ccm_ccgr6);
+}
+
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+static void _eim_setup_eim(void)
+{
+ // create structures
+ struct EIM_CS_GCR1 gcr1;
+ struct EIM_CS_GCR2 gcr2;
+ struct EIM_CS_RCR1 rcr1;
+ struct EIM_CS_RCR2 rcr2;
+ struct EIM_CS_WCR1 wcr1;
+ struct EIM_CS_WCR2 wcr2;
+
+ struct EIM_WCR wcr;
+ struct EIM_WIAR wiar;
+ struct EIM_EAR ear;
+
+ // read all the registers
+ eim_read_32(EIM_CS0GCR1, (uint32_t *)&gcr1);
+ eim_read_32(EIM_CS0GCR2, (uint32_t *)&gcr2);
+ eim_read_32(EIM_CS0RCR1, (uint32_t *)&rcr1);
+ eim_read_32(EIM_CS0RCR2, (uint32_t *)&rcr2);
+ eim_read_32(EIM_CS0WCR1, (uint32_t *)&wcr1);
+ eim_read_32(EIM_CS0WCR2, (uint32_t *)&wcr2);
+
+ eim_read_32(EIM_WCR, (uint32_t *)&wcr);
+ eim_read_32(EIM_WIAR, (uint32_t *)&wiar);
+ eim_read_32(EIM_EAR, (uint32_t *)&ear);
+
+ // manipulate registers as needed
+ gcr1.csen = 1; // chip select is enabled
+ gcr1.swr = 1; // write is sync
+ gcr1.srd = 1; // read is sync
+ gcr1.mum = 1; // address and data are multiplexed
+ gcr1.wfl = 0; // write latency is not fixed
+ gcr1.rfl = 0; // read latency is not fixed
+ gcr1.cre = 0; // CRE signal not needed
+ //gcr1.crep = x; // don't care, CRE not used
+ gcr1.bl = 4; // burst length
+ gcr1.wc = 0; // write is not continuous
+ gcr1.bcd = 3; // BCLK divisor is 3+1=4
+ gcr1.bcs = 1; // delay from ~CS to BCLK is 1 cycle
+ gcr1.dsz = 1; // 16 bits per databeat at DATA[15:0]
+ gcr1.sp = 0; // supervisor protection is disabled
+ gcr1.csrec = 1; // ~CS recovery is 1 cycle
+ gcr1.aus = 1; // address is not shifted
+ gcr1.gbc = 1; // ~CS gap is 1 cycle
+ gcr1.wp = 0; // write protection is not enabled
+ //gcr1.psz = x; // don't care, page mode is not used
+
+ gcr2.adh = 0; // address hold duration is 1 cycle
+ //gcr2.daps = x; // don't care, DTACK is not used
+ gcr2.dae = 0; // DTACK is not used
+ //gcr2.dap = x; // don't care, DTACK is not used
+ gcr2.mux16_byp_grant= 1; // enable grant mechanism
+ gcr2.reserved_3_2 = 0; // must be 0
+ gcr2.reserved_11_10 = 0; // must be 0
+ gcr2.reserved_31_13 = 0; // must be 0
+
+ //rcr1.rcsn = x; // don't care in sync mode
+ rcr1.rcsa = 0; // no delay for ~CS needed
+ //rcr1.oen = x; // don't care in sync mode
+ rcr1.oea = 0; // no delay for ~OE needed
+ rcr1.radvn = 0; // no delay for ~LBA needed
+ rcr1.ral = 0; // clear ~LBA when needed
+ rcr1.radva = 0; // no delay for ~LBA needed
+ rcr1.rwsc = 1; // one wait state
+ rcr1.reserved_3 = 0; // must be 0
+ rcr1.reserved_7 = 0; // must be 0
+ rcr1.reserved_11 = 0; // must be 0
+ rcr1.reserved_15 = 0; // must be 0
+ rcr1.reserved_23 = 0; // must be 0
+ rcr1.reserved_31_30 = 0; // must be 0
+
+ //rcr2.rben = x; // don't care in sync mode
+ rcr2.rbe = 0; // BE is disabled
+ //rcr2.rbea = x; // don't care when BE is not used
+ rcr2.rl = 0; // read latency is 0
+ //rcr2.pat = x; // don't care when page read is not used
+ rcr2.apr = 0; // page read mode is not used
+ rcr2.reserved_7 = 0; // must be 0
+ rcr2.reserved_11_10 = 0; // must be 0
+ rcr2.reserved_31_16 = 0; // must be 0
+
+ //wcr1.wcsn = x; // don't care in sync mode
+ wcr1.wcsa = 0; // no delay for ~CS needed
+ //wcr1.wen = x; // don't care in sync mode
+ wcr1.wea = 0; // no delay for ~WR_N needed
+ //wcr1.wben = x; // don't care in sync mode
+ //wcr1.wbea = x; // don't care in sync mode
+ wcr1.wadvn = 0; // no delay for ~LBA needed
+ wcr1.wadva = 0; // no delay for ~LBA needed
+ wcr1.wwsc = 1; // no wait state in needed
+ wcr1.wbed = 1; // BE is disabled
+ wcr1.wal = 0; // clear ~LBA when needed
+
+ wcr2.wbcdd = 0; // write clock division is not needed
+ wcr2.reserved_31_1 = 0; // must be 0
+
+ wcr.bcm = 0; // clock is only active during access
+ //wcr.gbcd = x; // don't care when BCM=0
+ wcr.inten = 0; // interrupt is not used
+ //wcr.intpol = x; // don't care when interrupt is not used
+ wcr.wdog_en = 1; // watchdog is enabled
+ wcr.wdog_limit = 00; // timeout is 128 BCLK cycles
+ wcr.reserved_3 = 0; // must be 0
+ wcr.reserved_7_6 = 0; // must be 0
+ wcr.reserved_31_11 = 0; // must be 0
+
+ wiar.ips_req = 0; // IPS not needed
+ wiar.ips_ack = 0; // IPS not needed
+ //wiar.irq = x; // don't touch
+ //wiar.errst = x; // don't touch
+ wiar.aclk_en = 1; // clock is enabled
+ wiar.reserved_31_5 = 0; // must be 0
+
+ //ear.error_addr = x; // read-only
+
+ // write modified registers
+ eim_write_32(EIM_CS0GCR1, (uint32_t *)&gcr1);
+ eim_write_32(EIM_CS0GCR2, (uint32_t *)&gcr2);
+ eim_write_32(EIM_CS0RCR1, (uint32_t *)&rcr1);
+ eim_write_32(EIM_CS0RCR2, (uint32_t *)&rcr2);
+ eim_write_32(EIM_CS0WCR1, (uint32_t *)&wcr1);
+ eim_write_32(EIM_CS0WCR2, (uint32_t *)&wcr2);
+ eim_write_32(EIM_WCR, (uint32_t *)&wcr);
+ eim_write_32(EIM_WIAR, (uint32_t *)&wiar);
+/* eim_write_32(EIM_EAR, (uint32_t *)&ear);*/
+}
+
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+void eim_write_32(off_t offset, uint32_t *pvalue)
+{
+ // calculate memory offset
+ uint32_t *ptr = (uint32_t *)_eim_calc_offset(offset);
+
+ // write data to memory
+ memcpy(ptr, pvalue, sizeof(uint32_t));
+}
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+void eim_read_32(off_t offset, uint32_t *pvalue)
+{
+ // calculate memory offset
+ uint32_t *ptr = (uint32_t *)_eim_calc_offset(offset);
+
+ // read data from memory
+ memcpy(pvalue, ptr, sizeof(uint32_t));
+}
+
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+static off_t _eim_calc_offset(off_t offset)
+{
+ // make sure that memory is mapped
+ if (mem_map_ptr == MAP_FAILED)
+ _eim_remap_mem(offset);
+
+ // calculate starting and ending addresses of currently mapped page
+ off_t offset_low = mem_base_addr;
+ off_t offset_high = mem_base_addr + (mem_page_size - 1);
+
+ // check that offset is in currently mapped page, remap new page otherwise
+ if ((offset < offset_low) || (offset > offset_high))
+ _eim_remap_mem(offset);
+
+ // calculate pointer
+ return (off_t)mem_map_ptr + (offset - mem_base_addr);
+}
+
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+static void _eim_remap_mem(off_t offset)
+{
+ // unmap old memory page if needed
+ if (mem_map_ptr != MAP_FAILED) {
+ if (munmap(mem_map_ptr, mem_page_size) != 0) {
+ fprintf(stderr, "ERROR: munmap() failed.\n");
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ // calculate starting address of new page
+ while (offset % mem_page_size)
+ offset--;
+
+ // try to map new memory page
+ mem_map_ptr = mmap(NULL, mem_page_size, PROT_READ | PROT_WRITE, MAP_SHARED,
+ mem_dev_fd, offset);
+ if (mem_map_ptr == MAP_FAILED) {
+ fprintf(stderr, "ERROR: mmap() failed.\n");
+ exit(EXIT_FAILURE);
+ }
+
+ // save last mapped page address
+ mem_base_addr = offset;
+}
+
+
+//------------------------------------------------------------------------------
+// End-of-File
+//------------------------------------------------------------------------------
diff --git a/sw/novena-eim.h b/sw/novena-eim.h
index 3d29f77..75613bf 100644
--- a/sw/novena-eim.h
+++ b/sw/novena-eim.h
@@ -1,297 +1,52 @@
-//------------------------------------------------------------------------------
-// novena-eim.h
-//------------------------------------------------------------------------------
-
-
-//------------------------------------------------------------------------------
-// Defined Values
-//------------------------------------------------------------------------------
-#define MEMORY_DEVICE "/dev/mem"
-
-
-//------------------------------------------------------------------------------
-// IOMUXC Values
-//------------------------------------------------------------------------------
-#define IOMUXC_MUX_MODE_ALT0 0 // 000
-
-#define IOMUXC_PAD_CTL_SRE_FAST 1 // 1
-#define IOMUXC_PAD_CTL_DSE_33_OHM 7 // 111
-#define IOMUXC_PAD_CTL_SPEED_MEDIUM_10 2 // 10
-#define IOMUXC_PAD_CTL_ODE_DISABLED 0 // 0
-#define IOMUXC_PAD_CTL_PKE_DISABLED 0 // 0
-#define IOMUXC_PAD_CTL_PUE_PULL 1 // 1
-#define IOMUXC_PAD_CTL_PUS_100K_OHM_PU 2 // 10
-#define IOMUXC_PAD_CTL_HYS_DISABLED 0 // 0
-
-//------------------------------------------------------------------------------
-// CCM Values
-//------------------------------------------------------------------------------
-#define CCM_CGR_OFF 0 // 00
-#define CCM_CGR_ON_EXCEPT_STOP 3 // 11
-
-
-//------------------------------------------------------------------------------
-// CPU Registers
-//------------------------------------------------------------------------------
-enum IMX6DQ_REGISTER_OFFSET
-{
- IOMUXC_SW_MUX_CTL_PAD_EIM_CS0_B = 0x020E00F8,
- IOMUXC_SW_MUX_CTL_PAD_EIM_OE_B = 0x020E0100,
- IOMUXC_SW_MUX_CTL_PAD_EIM_RW = 0x020E0104,
- IOMUXC_SW_MUX_CTL_PAD_EIM_LBA_B = 0x020E0108,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD00 = 0x020E0114,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD01 = 0x020E0118,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD02 = 0x020E011C,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD03 = 0x020E0120,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD04 = 0x020E0124,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD05 = 0x020E0128,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD06 = 0x020E012C,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD07 = 0x020E0130,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD08 = 0x020E0134,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD09 = 0x020E0138,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD10 = 0x020E013C,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD11 = 0x020E0140,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD12 = 0x020E0144,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD13 = 0x020E0148,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD14 = 0x020E014C,
- IOMUXC_SW_MUX_CTL_PAD_EIM_AD15 = 0x020E0150,
- IOMUXC_SW_MUX_CTL_PAD_EIM_WAIT_B = 0x020E0154,
- IOMUXC_SW_MUX_CTL_PAD_EIM_BCLK = 0x020E0158,
-
- IOMUXC_SW_PAD_CTL_PAD_EIM_CS0_B = 0x020E040C,
- IOMUXC_SW_PAD_CTL_PAD_EIM_OE_B = 0x020E0414,
- IOMUXC_SW_PAD_CTL_PAD_EIM_RW = 0x020E0418,
- IOMUXC_SW_PAD_CTL_PAD_EIM_LBA_B = 0x020E041C,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD00 = 0x020E0428,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD01 = 0x020E042C,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD02 = 0x020E0430,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD03 = 0x020E0434,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD04 = 0x020E0438,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD05 = 0x020E043C,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD06 = 0x020E0440,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD07 = 0x020E0444,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD08 = 0x020E0448,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD09 = 0x020E044C,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD10 = 0x020E0450,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD11 = 0x020E0454,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD12 = 0x020E0458,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD13 = 0x020E045C,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD14 = 0x020E0460,
- IOMUXC_SW_PAD_CTL_PAD_EIM_AD15 = 0x020E0464,
- IOMUXC_SW_PAD_CTL_PAD_EIM_WAIT_B = 0x020E0468,
- IOMUXC_SW_PAD_CTL_PAD_EIM_BCLK = 0x020E046C,
-
- CCM_CCGR6 = 0x020C4080,
-
- EIM_CS0GCR1 = 0x021B8000,
- EIM_CS0GCR2 = 0x021B8004,
- EIM_CS0RCR1 = 0x021B8008,
- EIM_CS0RCR2 = 0x021B800C,
- EIM_CS0WCR1 = 0x021B8010,
- EIM_CS0WCR2 = 0x021B8014,
-
- EIM_WCR = 0x021B8090,
- EIM_WIAR = 0x021B8094,
- EIM_EAR = 0x021B8098,
-
- EIM_BASE_ADDR = 0x08000000
-};
-
-
-//------------------------------------------------------------------------------
-struct IOMUXC_SW_MUX_CTL_PAD_EIM
-//------------------------------------------------------------------------------
-{
- uint32_t mux_mode : 3;
- uint32_t reserved_3 : 1;
- uint32_t sion : 1;
- uint32_t reserved_31_5 : 27;
-};
-//------------------------------------------------------------------------------
-struct IOMUXC_SW_PAD_CTL_PAD_EIM
-//------------------------------------------------------------------------------
-{
- uint32_t sre : 1;
- uint32_t reserved_2_1 : 2;
- uint32_t dse : 3;
- uint32_t speed : 2;
- uint32_t reserved_10_8 : 3;
- uint32_t ode : 1;
- uint32_t pke : 1;
- uint32_t pue : 1;
- uint32_t pus : 2;
- uint32_t hys : 1;
- uint32_t reserved_31_17 : 15;
-};
-
-
-//------------------------------------------------------------------------------
-struct CCM_CCGR6
-//------------------------------------------------------------------------------
-{
- uint32_t cg0_usboh3 : 2;
- uint32_t cg1_usdhc1 : 2;
- uint32_t cg2_usdhc2 : 2;
- uint32_t cg3_usdhc3 : 2;
-
- uint32_t cg3_usdhc4 : 2;
- uint32_t cg5_eim_slow : 2;
- uint32_t cg6_vdoaxiclk : 2;
- uint32_t cg7_vpu : 2;
-
- uint32_t cg8_reserved : 2;
- uint32_t cg9_reserved : 2;
- uint32_t cg10_reserved : 2;
- uint32_t cg11_reserved : 2;
-
- uint32_t cg12_reserved : 2;
- uint32_t cg13_reserved : 2;
- uint32_t cg14_reserved : 2;
- uint32_t cg15_reserved : 2;
-};
-
-
-//------------------------------------------------------------------------------
-struct EIM_CS_GCR1
-//------------------------------------------------------------------------------
-{
- uint32_t csen : 1;
- uint32_t swr : 1;
- uint32_t srd : 1;
- uint32_t mum : 1;
- uint32_t wfl : 1;
- uint32_t rfl : 1;
- uint32_t cre : 1;
- uint32_t crep : 1;
- uint32_t bl : 3;
- uint32_t wc : 1;
- uint32_t bcd : 2;
- uint32_t bcs : 2;
- uint32_t dsz : 3;
- uint32_t sp : 1;
- uint32_t csrec : 3;
- uint32_t aus : 1;
- uint32_t gbc : 3;
- uint32_t wp : 1;
- uint32_t psz : 4;
-};
-//------------------------------------------------------------------------------
-struct EIM_CS_GCR2
-//------------------------------------------------------------------------------
-{
- uint32_t adh : 2;
- uint32_t reserved_3_2 : 2;
- uint32_t daps : 4;
- uint32_t dae : 1;
- uint32_t dap : 1;
- uint32_t reserved_11_10 : 2;
- uint32_t mux16_byp_grant : 1;
- uint32_t reserved_31_13 : 19;
-};
-//------------------------------------------------------------------------------
-struct EIM_CS_RCR1
-//------------------------------------------------------------------------------
-{
- uint32_t rcsn : 3;
- uint32_t reserved_3 : 1;
- uint32_t rcsa : 3;
- uint32_t reserved_7 : 1;
- uint32_t oen : 3;
- uint32_t reserved_11 : 1;
- uint32_t oea : 3;
- uint32_t reserved_15 : 1;
- uint32_t radvn : 3;
- uint32_t ral : 1;
- uint32_t radva : 3;
- uint32_t reserved_23 : 1;
- uint32_t rwsc : 6;
- uint32_t reserved_31_30 : 2;
-};
-//------------------------------------------------------------------------------
-struct EIM_CS_RCR2
-//------------------------------------------------------------------------------
-{
- uint32_t rben : 3;
- uint32_t rbe : 1;
- uint32_t rbea : 3;
- uint32_t reserved_7 : 1;
- uint32_t rl : 2;
- uint32_t reserved_11_10 : 2;
- uint32_t pat : 3;
- uint32_t apr : 1;
- uint32_t reserved_31_16 : 16;
-};
-//------------------------------------------------------------------------------
-struct EIM_CS_WCR1
-//------------------------------------------------------------------------------
-{
- uint32_t wcsn : 3;
- uint32_t wcsa : 3;
- uint32_t wen : 3;
- uint32_t wea : 3;
- uint32_t wben : 3;
- uint32_t wbea : 3;
- uint32_t wadvn : 3;
- uint32_t wadva : 3;
- uint32_t wwsc : 6;
- uint32_t wbed : 1;
- uint32_t wal : 1;
-};
-//------------------------------------------------------------------------------
-struct EIM_CS_WCR2
-//------------------------------------------------------------------------------
-{
- uint32_t wbcdd : 1;
- uint32_t reserved_31_1 : 31;
-};
-//------------------------------------------------------------------------------
-struct EIM_WCR
-//------------------------------------------------------------------------------
-{
- uint32_t bcm : 1;
- uint32_t gbcd : 2;
- uint32_t reserved_3 : 1;
- uint32_t inten : 1;
- uint32_t intpol : 1;
- uint32_t reserved_7_6 : 2;
- uint32_t wdog_en : 1;
- uint32_t wdog_limit : 2;
- uint32_t reserved_31_11 : 21;
-};
-//------------------------------------------------------------------------------
-struct EIM_WIAR
-//------------------------------------------------------------------------------
-{
- uint32_t ips_req : 1;
- uint32_t ips_ack : 1;
- uint32_t irq : 1;
- uint32_t errst : 1;
- uint32_t aclk_en : 1;
- uint32_t reserved_31_5 : 27;
-};
-//------------------------------------------------------------------------------
-struct EIM_EAR
-//------------------------------------------------------------------------------
-{
- uint32_t error_addr : 32;
-};
-
-
-//------------------------------------------------------------------------------
-// Prototypes
-//------------------------------------------------------------------------------
-int eim_setup ();
-void eim_write_32 (off_t, uint32_t *);
-void eim_read_32 (off_t, uint32_t *);
-
-void _eim_setup_iomuxc ();
-void _eim_setup_ccm ();
-void _eim_setup_eim ();
-void _eim_cleanup ();
-off_t _eim_calc_offset (off_t);
-void _eim_remap_mem (off_t);
-
-
-//------------------------------------------------------------------------------
-// End-of-File
-//------------------------------------------------------------------------------
+/*
+ * novena-eim.h
+ * ------------
+ * This module contains the userland magic to set up and use the EIM bus.
+ *
+ *
+ * Author: Pavel Shatov
+ * Copyright (c) 2014-2015, NORDUnet A/S All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of the NORDUnet nor the names of its contributors may
+ * be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define EIM_BASE_ADDR 0x08000000
+
+/* Set up EIM bus.
+ * Returns 0 on success, -1 on failure.
+ */
+int eim_setup(void);
+
+/* Write a 32-bit word to EIM.
+ * If EIM is not set up correctly, this will abort with a bus error.
+ */
+void eim_write_32(off_t, uint32_t *);
+
+/* Read a 32-bit word from EIM.
+ * If EIM is not set up correctly, this will abort with a bus error.
+ */
+void eim_read_32(off_t, uint32_t *);
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