3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * I2C Functions similar to the standard memory functions.
27 * There are several parameters in many of the commands that bear further
30 * {i2c_chip} is the I2C chip address (the first byte sent on the bus).
31 * Each I2C chip on the bus has a unique address. On the I2C data bus,
32 * the address is the upper seven bits and the LSB is the "read/write"
33 * bit. Note that the {i2c_chip} address specified on the command
34 * line is not shifted up: e.g. a typical EEPROM memory chip may have
35 * an I2C address of 0x50, but the data put on the bus will be 0xA0
36 * for write and 0xA1 for read. This "non shifted" address notation
37 * matches at least half of the data sheets :-/.
39 * {addr} is the address (or offset) within the chip. Small memory
40 * chips have 8 bit addresses. Large memory chips have 16 bit
41 * addresses. Other memory chips have 9, 10, or 11 bit addresses.
42 * Many non-memory chips have multiple registers and {addr} is used
43 * as the register index. Some non-memory chips have only one register
44 * and therefore don't need any {addr} parameter.
46 * The default {addr} parameter is one byte (.1) which works well for
47 * memories and registers with 8 bits of address space.
49 * You can specify the length of the {addr} field with the optional .0,
50 * .1, or .2 modifier (similar to the .b, .w, .l modifier). If you are
51 * manipulating a single register device which doesn't use an address
52 * field, use "0.0" for the address and the ".0" length field will
53 * suppress the address in the I2C data stream. This also works for
54 * successive reads using the I2C auto-incrementing memory pointer.
56 * If you are manipulating a large memory with 2-byte addresses, use
57 * the .2 address modifier, e.g. 210.2 addresses location 528 (decimal).
59 * Then there are the unfortunate memory chips that spill the most
60 * significant 1, 2, or 3 bits of address into the chip address byte.
61 * This effectively makes one chip (logically) look like 2, 4, or
62 * 8 chips. This is handled (awkwardly) by #defining
63 * CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW and using the .1 modifier on the
64 * {addr} field (since .1 is the default, it doesn't actually have to
65 * be specified). Examples: given a memory chip at I2C chip address
66 * 0x50, the following would happen...
67 * i2c md 50 0 10 display 16 bytes starting at 0x000
68 * On the bus: <S> A0 00 <E> <S> A1 <rd> ... <rd>
69 * i2c md 50 100 10 display 16 bytes starting at 0x100
70 * On the bus: <S> A2 00 <E> <S> A3 <rd> ... <rd>
71 * i2c md 50 210 10 display 16 bytes starting at 0x210
72 * On the bus: <S> A4 10 <E> <S> A5 <rd> ... <rd>
73 * This is awfully ugly. It would be nice if someone would think up
74 * a better way of handling this.
76 * Adapted from cmd_mem.c which is copyright Wolfgang Denk (wd@denx.de).
81 #include <environment.h>
84 #include <asm/byteorder.h>
85 #include <linux/compiler.h>
87 /* Display values from last command.
88 * Memory modify remembered values are different from display memory.
90 static uchar i2c_dp_last_chip;
91 static uint i2c_dp_last_addr;
92 static uint i2c_dp_last_alen;
93 static uint i2c_dp_last_length = 0x10;
95 static uchar i2c_mm_last_chip;
96 static uint i2c_mm_last_addr;
97 static uint i2c_mm_last_alen;
99 /* If only one I2C bus is present, the list of devices to ignore when
100 * the probe command is issued is represented by a 1D array of addresses.
101 * When multiple buses are present, the list is an array of bus-address
102 * pairs. The following macros take care of this */
104 #if defined(CONFIG_SYS_I2C_NOPROBES)
105 #if defined(CONFIG_I2C_MULTI_BUS)
110 } i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
111 #define GET_BUS_NUM i2c_get_bus_num()
112 #define COMPARE_BUS(b,i) (i2c_no_probes[(i)].bus == (b))
113 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)].addr == (a))
114 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)].addr
115 #else /* single bus */
116 static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
117 #define GET_BUS_NUM 0
118 #define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */
119 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a))
120 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)]
121 #endif /* CONFIG_MULTI_BUS */
123 #define NUM_ELEMENTS_NOPROBE (sizeof(i2c_no_probes)/sizeof(i2c_no_probes[0]))
126 #if defined(CONFIG_I2C_MUX)
127 static I2C_MUX_DEVICE *i2c_mux_devices = NULL;
128 static int i2c_mux_busid = CONFIG_SYS_MAX_I2C_BUS;
130 DECLARE_GLOBAL_DATA_PTR;
134 #define DISP_LINE_LEN 16
137 * i2c_init_board() - Board-specific I2C bus init
139 * This function is the default no-op implementation of I2C bus
140 * initialization. This function can be overriden by board-specific
141 * implementation if needed.
144 void i2c_init_board(void)
149 /* TODO: Implement architecture-specific get/set functions */
152 * i2c_get_bus_speed() - Return I2C bus speed
154 * This function is the default implementation of function for retrieveing
155 * the current I2C bus speed in Hz.
157 * A driver implementing runtime switching of I2C bus speed must override
158 * this function to report the speed correctly. Simple or legacy drivers
159 * can use this fallback.
161 * Returns I2C bus speed in Hz.
164 unsigned int i2c_get_bus_speed(void)
166 return CONFIG_SYS_I2C_SPEED;
170 * i2c_set_bus_speed() - Configure I2C bus speed
171 * @speed: Newly set speed of the I2C bus in Hz
173 * This function is the default implementation of function for setting
174 * the I2C bus speed in Hz.
176 * A driver implementing runtime switching of I2C bus speed must override
177 * this function to report the speed correctly. Simple or legacy drivers
178 * can use this fallback.
180 * Returns zero on success, negative value on error.
183 int i2c_set_bus_speed(unsigned int speed)
185 if (speed != CONFIG_SYS_I2C_SPEED)
192 * get_alen() - Small parser helper function to get address length
194 * Returns the address length.
196 static uint get_alen(char *arg)
202 for (j = 0; j < 8; j++) {
204 alen = arg[j+1] - '0';
206 } else if (arg[j] == '\0')
213 * do_i2c_read() - Handle the "i2c read" command-line command
214 * @cmdtp: Command data struct pointer
215 * @flag: Command flag
216 * @argc: Command-line argument count
217 * @argv: Array of command-line arguments
219 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
223 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
225 static int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
228 uint devaddr, alen, length;
232 return CMD_RET_USAGE;
237 chip = simple_strtoul(argv[1], NULL, 16);
240 * I2C data address within the chip. This can be 1 or
241 * 2 bytes long. Some day it might be 3 bytes long :-).
243 devaddr = simple_strtoul(argv[2], NULL, 16);
244 alen = get_alen(argv[2]);
246 return CMD_RET_USAGE;
249 * Length is the number of objects, not number of bytes.
251 length = simple_strtoul(argv[3], NULL, 16);
254 * memaddr is the address where to store things in memory
256 memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);
258 if (i2c_read(chip, devaddr, alen, memaddr, length) != 0) {
259 puts ("Error reading the chip.\n");
265 static int do_i2c_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
268 uint devaddr, alen, length;
272 return cmd_usage(cmdtp);
275 * memaddr is the address where to store things in memory
277 memaddr = (u_char *)simple_strtoul(argv[1], NULL, 16);
282 chip = simple_strtoul(argv[2], NULL, 16);
285 * I2C data address within the chip. This can be 1 or
286 * 2 bytes long. Some day it might be 3 bytes long :-).
288 devaddr = simple_strtoul(argv[3], NULL, 16);
289 alen = get_alen(argv[3]);
291 return cmd_usage(cmdtp);
294 * Length is the number of objects, not number of bytes.
296 length = simple_strtoul(argv[4], NULL, 16);
298 while (length-- > 0) {
299 if (i2c_write(chip, devaddr++, alen, memaddr++, 1) != 0) {
300 puts("Error writing to the chip.\n");
304 * No write delay with FRAM devices.
306 #if !defined(CONFIG_SYS_I2C_FRAM)
314 * do_i2c_md() - Handle the "i2c md" command-line command
315 * @cmdtp: Command data struct pointer
316 * @flag: Command flag
317 * @argc: Command-line argument count
318 * @argv: Array of command-line arguments
320 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
324 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
326 static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
329 uint addr, alen, length;
330 int j, nbytes, linebytes;
332 /* We use the last specified parameters, unless new ones are
335 chip = i2c_dp_last_chip;
336 addr = i2c_dp_last_addr;
337 alen = i2c_dp_last_alen;
338 length = i2c_dp_last_length;
341 return CMD_RET_USAGE;
343 if ((flag & CMD_FLAG_REPEAT) == 0) {
345 * New command specified.
351 chip = simple_strtoul(argv[1], NULL, 16);
354 * I2C data address within the chip. This can be 1 or
355 * 2 bytes long. Some day it might be 3 bytes long :-).
357 addr = simple_strtoul(argv[2], NULL, 16);
358 alen = get_alen(argv[2]);
360 return CMD_RET_USAGE;
363 * If another parameter, it is the length to display.
364 * Length is the number of objects, not number of bytes.
367 length = simple_strtoul(argv[3], NULL, 16);
373 * We buffer all read data, so we can make sure data is read only
378 unsigned char linebuf[DISP_LINE_LEN];
381 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
383 if (i2c_read(chip, addr, alen, linebuf, linebytes) != 0)
384 puts ("Error reading the chip.\n");
386 printf("%04x:", addr);
388 for (j=0; j<linebytes; j++) {
389 printf(" %02x", *cp++);
394 for (j=0; j<linebytes; j++) {
395 if ((*cp < 0x20) || (*cp > 0x7e))
404 } while (nbytes > 0);
406 i2c_dp_last_chip = chip;
407 i2c_dp_last_addr = addr;
408 i2c_dp_last_alen = alen;
409 i2c_dp_last_length = length;
415 * do_i2c_mw() - Handle the "i2c mw" command-line command
416 * @cmdtp: Command data struct pointer
417 * @flag: Command flag
418 * @argc: Command-line argument count
419 * @argv: Array of command-line arguments
421 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
425 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
427 static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
435 if ((argc < 4) || (argc > 5))
436 return CMD_RET_USAGE;
439 * Chip is always specified.
441 chip = simple_strtoul(argv[1], NULL, 16);
444 * Address is always specified.
446 addr = simple_strtoul(argv[2], NULL, 16);
447 alen = get_alen(argv[2]);
449 return CMD_RET_USAGE;
452 * Value to write is always specified.
454 byte = simple_strtoul(argv[3], NULL, 16);
460 count = simple_strtoul(argv[4], NULL, 16);
464 while (count-- > 0) {
465 if (i2c_write(chip, addr++, alen, &byte, 1) != 0)
466 puts ("Error writing the chip.\n");
468 * Wait for the write to complete. The write can take
469 * up to 10mSec (we allow a little more time).
472 * No write delay with FRAM devices.
474 #if !defined(CONFIG_SYS_I2C_FRAM)
483 * do_i2c_crc() - Handle the "i2c crc32" command-line command
484 * @cmdtp: Command data struct pointer
485 * @flag: Command flag
486 * @argc: Command-line argument count
487 * @argv: Array of command-line arguments
489 * Calculate a CRC on memory
491 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
495 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
497 static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
508 return CMD_RET_USAGE;
511 * Chip is always specified.
513 chip = simple_strtoul(argv[1], NULL, 16);
516 * Address is always specified.
518 addr = simple_strtoul(argv[2], NULL, 16);
519 alen = get_alen(argv[2]);
521 return CMD_RET_USAGE;
524 * Count is always specified
526 count = simple_strtoul(argv[3], NULL, 16);
528 printf ("CRC32 for %08lx ... %08lx ==> ", addr, addr + count - 1);
530 * CRC a byte at a time. This is going to be slooow, but hey, the
531 * memories are small and slow too so hopefully nobody notices.
535 while (count-- > 0) {
536 if (i2c_read(chip, addr, alen, &byte, 1) != 0)
538 crc = crc32 (crc, &byte, 1);
542 puts ("Error reading the chip,\n");
544 printf ("%08lx\n", crc);
550 * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
551 * @cmdtp: Command data struct pointer
552 * @flag: Command flag
553 * @argc: Command-line argument count
554 * @argv: Array of command-line arguments
558 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
562 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
563 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
566 mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const argv[])
576 return CMD_RET_USAGE;
578 #ifdef CONFIG_BOOT_RETRY_TIME
579 reset_cmd_timeout(); /* got a good command to get here */
582 * We use the last specified parameters, unless new ones are
585 chip = i2c_mm_last_chip;
586 addr = i2c_mm_last_addr;
587 alen = i2c_mm_last_alen;
589 if ((flag & CMD_FLAG_REPEAT) == 0) {
591 * New command specified. Check for a size specification.
592 * Defaults to byte if no or incorrect specification.
594 size = cmd_get_data_size(argv[0], 1);
597 * Chip is always specified.
599 chip = simple_strtoul(argv[1], NULL, 16);
602 * Address is always specified.
604 addr = simple_strtoul(argv[2], NULL, 16);
605 alen = get_alen(argv[2]);
607 return CMD_RET_USAGE;
611 * Print the address, followed by value. Then accept input for
612 * the next value. A non-converted value exits.
615 printf("%08lx:", addr);
616 if (i2c_read(chip, addr, alen, (uchar *)&data, size) != 0)
617 puts ("\nError reading the chip,\n");
619 data = cpu_to_be32(data);
621 printf(" %02lx", (data >> 24) & 0x000000FF);
623 printf(" %04lx", (data >> 16) & 0x0000FFFF);
625 printf(" %08lx", data);
628 nbytes = readline (" ? ");
631 * <CR> pressed as only input, don't modify current
632 * location and move to next.
637 #ifdef CONFIG_BOOT_RETRY_TIME
638 reset_cmd_timeout(); /* good enough to not time out */
641 #ifdef CONFIG_BOOT_RETRY_TIME
642 else if (nbytes == -2)
643 break; /* timed out, exit the command */
648 data = simple_strtoul(console_buffer, &endp, 16);
653 data = be32_to_cpu(data);
654 nbytes = endp - console_buffer;
656 #ifdef CONFIG_BOOT_RETRY_TIME
658 * good enough to not time out
662 if (i2c_write(chip, addr, alen, (uchar *)&data, size) != 0)
663 puts ("Error writing the chip.\n");
664 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
665 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
673 i2c_mm_last_chip = chip;
674 i2c_mm_last_addr = addr;
675 i2c_mm_last_alen = alen;
681 * do_i2c_probe() - Handle the "i2c probe" command-line command
682 * @cmdtp: Command data struct pointer
683 * @flag: Command flag
684 * @argc: Command-line argument count
685 * @argv: Array of command-line arguments
687 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
693 * Returns zero (success) if one or more I2C devices was found
695 static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
700 #if defined(CONFIG_SYS_I2C_NOPROBES)
702 uchar bus = GET_BUS_NUM;
703 #endif /* NOPROBES */
706 addr = simple_strtol(argv[1], 0, 16);
708 puts ("Valid chip addresses:");
709 for (j = 0; j < 128; j++) {
710 if ((0 <= addr) && (j != addr))
713 #if defined(CONFIG_SYS_I2C_NOPROBES)
715 for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
716 if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
724 if (i2c_probe(j) == 0) {
731 #if defined(CONFIG_SYS_I2C_NOPROBES)
732 puts ("Excluded chip addresses:");
733 for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
734 if (COMPARE_BUS(bus,k))
735 printf(" %02X", NO_PROBE_ADDR(k));
744 * do_i2c_loop() - Handle the "i2c loop" command-line command
745 * @cmdtp: Command data struct pointer
746 * @flag: Command flag
747 * @argc: Command-line argument count
748 * @argv: Array of command-line arguments
750 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
754 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
755 * {length} - Number of bytes to read
756 * {delay} - A DECIMAL number and defaults to 1000 uSec
758 static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
768 return CMD_RET_USAGE;
771 * Chip is always specified.
773 chip = simple_strtoul(argv[1], NULL, 16);
776 * Address is always specified.
778 addr = simple_strtoul(argv[2], NULL, 16);
779 alen = get_alen(argv[2]);
781 return CMD_RET_USAGE;
784 * Length is the number of objects, not number of bytes.
787 length = simple_strtoul(argv[3], NULL, 16);
788 if (length > sizeof(bytes))
789 length = sizeof(bytes);
792 * The delay time (uSec) is optional.
796 delay = simple_strtoul(argv[4], NULL, 10);
801 if (i2c_read(chip, addr, alen, bytes, length) != 0)
802 puts ("Error reading the chip.\n");
811 * The SDRAM command is separately configured because many
812 * (most?) embedded boards don't use SDRAM DIMMs.
814 * FIXME: Document and probably move elsewhere!
816 #if defined(CONFIG_CMD_SDRAM)
817 static void print_ddr2_tcyc (u_char const b)
819 printf ("%d.", (b >> 4) & 0x0F);
831 printf ("%d ns\n", b & 0x0F);
851 static void decode_bits (u_char const b, char const *str[], int const do_once)
855 for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) {
866 * i2c sdram {i2c_chip}
868 static int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
870 enum { unknown, EDO, SDRAM, DDR2 } type;
877 static const char *decode_CAS_DDR2[] = {
878 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
881 static const char *decode_CAS_default[] = {
882 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
885 static const char *decode_CS_WE_default[] = {
886 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
889 static const char *decode_byte21_default[] = {
891 " Redundant row address\n",
892 " Differential clock input\n",
893 " Registerd DQMB inputs\n",
894 " Buffered DQMB inputs\n",
896 " Registered address/control lines\n",
897 " Buffered address/control lines\n"
900 static const char *decode_byte22_DDR2[] = {
906 " Supports partial array self refresh\n",
907 " Supports 50 ohm ODT\n",
908 " Supports weak driver\n"
911 static const char *decode_row_density_DDR2[] = {
912 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
913 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
916 static const char *decode_row_density_default[] = {
917 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
918 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
922 return CMD_RET_USAGE;
925 * Chip is always specified.
927 chip = simple_strtoul (argv[1], NULL, 16);
929 if (i2c_read (chip, 0, 1, data, sizeof (data)) != 0) {
930 puts ("No SDRAM Serial Presence Detect found.\n");
935 for (j = 0; j < 63; j++) {
938 if (cksum != data[63]) {
939 printf ("WARNING: Configuration data checksum failure:\n"
940 " is 0x%02x, calculated 0x%02x\n", data[63], cksum);
942 printf ("SPD data revision %d.%d\n",
943 (data[62] >> 4) & 0x0F, data[62] & 0x0F);
944 printf ("Bytes used 0x%02X\n", data[0]);
945 printf ("Serial memory size 0x%02X\n", 1 << data[1]);
947 puts ("Memory type ");
967 puts ("Row address bits ");
968 if ((data[3] & 0x00F0) == 0)
969 printf ("%d\n", data[3] & 0x0F);
971 printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);
973 puts ("Column address bits ");
974 if ((data[4] & 0x00F0) == 0)
975 printf ("%d\n", data[4] & 0x0F);
977 printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);
981 printf ("Number of ranks %d\n",
982 (data[5] & 0x07) + 1);
985 printf ("Module rows %d\n", data[5]);
991 printf ("Module data width %d bits\n", data[6]);
994 printf ("Module data width %d bits\n",
995 (data[7] << 8) | data[6]);
999 puts ("Interface signal levels ");
1001 case 0: puts ("TTL 5.0 V\n"); break;
1002 case 1: puts ("LVTTL\n"); break;
1003 case 2: puts ("HSTL 1.5 V\n"); break;
1004 case 3: puts ("SSTL 3.3 V\n"); break;
1005 case 4: puts ("SSTL 2.5 V\n"); break;
1006 case 5: puts ("SSTL 1.8 V\n"); break;
1007 default: puts ("unknown\n"); break;
1012 printf ("SDRAM cycle time ");
1013 print_ddr2_tcyc (data[9]);
1016 printf ("SDRAM cycle time %d.%d ns\n",
1017 (data[9] >> 4) & 0x0F, data[9] & 0x0F);
1023 printf ("SDRAM access time 0.%d%d ns\n",
1024 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1027 printf ("SDRAM access time %d.%d ns\n",
1028 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1032 puts ("EDC configuration ");
1034 case 0: puts ("None\n"); break;
1035 case 1: puts ("Parity\n"); break;
1036 case 2: puts ("ECC\n"); break;
1037 default: puts ("unknown\n"); break;
1040 if ((data[12] & 0x80) == 0)
1041 puts ("No self refresh, rate ");
1043 puts ("Self refresh, rate ");
1045 switch(data[12] & 0x7F) {
1046 case 0: puts ("15.625 us\n"); break;
1047 case 1: puts ("3.9 us\n"); break;
1048 case 2: puts ("7.8 us\n"); break;
1049 case 3: puts ("31.3 us\n"); break;
1050 case 4: puts ("62.5 us\n"); break;
1051 case 5: puts ("125 us\n"); break;
1052 default: puts ("unknown\n"); break;
1057 printf ("SDRAM width (primary) %d\n", data[13]);
1060 printf ("SDRAM width (primary) %d\n", data[13] & 0x7F);
1061 if ((data[13] & 0x80) != 0) {
1062 printf (" (second bank) %d\n",
1063 2 * (data[13] & 0x7F));
1071 printf ("EDC width %d\n", data[14]);
1074 if (data[14] != 0) {
1075 printf ("EDC width %d\n",
1078 if ((data[14] & 0x80) != 0) {
1079 printf (" (second bank) %d\n",
1080 2 * (data[14] & 0x7F));
1087 printf ("Min clock delay, back-to-back random column addresses "
1091 puts ("Burst length(s) ");
1092 if (data[16] & 0x80) puts (" Page");
1093 if (data[16] & 0x08) puts (" 8");
1094 if (data[16] & 0x04) puts (" 4");
1095 if (data[16] & 0x02) puts (" 2");
1096 if (data[16] & 0x01) puts (" 1");
1098 printf ("Number of banks %d\n", data[17]);
1102 puts ("CAS latency(s) ");
1103 decode_bits (data[18], decode_CAS_DDR2, 0);
1107 puts ("CAS latency(s) ");
1108 decode_bits (data[18], decode_CAS_default, 0);
1114 puts ("CS latency(s) ");
1115 decode_bits (data[19], decode_CS_WE_default, 0);
1120 puts ("WE latency(s) ");
1121 decode_bits (data[20], decode_CS_WE_default, 0);
1127 puts ("Module attributes:\n");
1128 if (data[21] & 0x80)
1129 puts (" TBD (bit 7)\n");
1130 if (data[21] & 0x40)
1131 puts (" Analysis probe installed\n");
1132 if (data[21] & 0x20)
1133 puts (" TBD (bit 5)\n");
1134 if (data[21] & 0x10)
1135 puts (" FET switch external enable\n");
1136 printf (" %d PLLs on DIMM\n", (data[21] >> 2) & 0x03);
1137 if (data[20] & 0x11) {
1138 printf (" %d active registers on DIMM\n",
1139 (data[21] & 0x03) + 1);
1143 puts ("Module attributes:\n");
1147 decode_bits (data[21], decode_byte21_default, 0);
1153 decode_bits (data[22], decode_byte22_DDR2, 0);
1156 puts ("Device attributes:\n");
1157 if (data[22] & 0x80) puts (" TBD (bit 7)\n");
1158 if (data[22] & 0x40) puts (" TBD (bit 6)\n");
1159 if (data[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1160 else puts (" Upper Vcc tolerance 10%\n");
1161 if (data[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1162 else puts (" Lower Vcc tolerance 10%\n");
1163 if (data[22] & 0x08) puts (" Supports write1/read burst\n");
1164 if (data[22] & 0x04) puts (" Supports precharge all\n");
1165 if (data[22] & 0x02) puts (" Supports auto precharge\n");
1166 if (data[22] & 0x01) puts (" Supports early RAS# precharge\n");
1172 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1173 print_ddr2_tcyc (data[23]);
1176 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1177 "%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F);
1183 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1184 "%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1187 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1188 "%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1194 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1195 print_ddr2_tcyc (data[25]);
1198 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1199 "%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F);
1205 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1206 "%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1209 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1210 "%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1216 printf ("Minimum row precharge %d.%02d ns\n",
1217 (data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03));
1220 printf ("Minimum row precharge %d ns\n", data[27]);
1226 printf ("Row active to row active min %d.%02d ns\n",
1227 (data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03));
1230 printf ("Row active to row active min %d ns\n", data[28]);
1236 printf ("RAS to CAS delay min %d.%02d ns\n",
1237 (data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03));
1240 printf ("RAS to CAS delay min %d ns\n", data[29]);
1244 printf ("Minimum RAS pulse width %d ns\n", data[30]);
1248 puts ("Density of each row ");
1249 decode_bits (data[31], decode_row_density_DDR2, 1);
1253 puts ("Density of each row ");
1254 decode_bits (data[31], decode_row_density_default, 1);
1261 puts ("Command and Address setup ");
1262 if (data[32] >= 0xA0) {
1263 printf ("1.%d%d ns\n",
1264 ((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F);
1266 printf ("0.%d%d ns\n",
1267 ((data[32] >> 4) & 0x0F), data[32] & 0x0F);
1271 printf ("Command and Address setup %c%d.%d ns\n",
1272 (data[32] & 0x80) ? '-' : '+',
1273 (data[32] >> 4) & 0x07, data[32] & 0x0F);
1279 puts ("Command and Address hold ");
1280 if (data[33] >= 0xA0) {
1281 printf ("1.%d%d ns\n",
1282 ((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F);
1284 printf ("0.%d%d ns\n",
1285 ((data[33] >> 4) & 0x0F), data[33] & 0x0F);
1289 printf ("Command and Address hold %c%d.%d ns\n",
1290 (data[33] & 0x80) ? '-' : '+',
1291 (data[33] >> 4) & 0x07, data[33] & 0x0F);
1297 printf ("Data signal input setup 0.%d%d ns\n",
1298 (data[34] >> 4) & 0x0F, data[34] & 0x0F);
1301 printf ("Data signal input setup %c%d.%d ns\n",
1302 (data[34] & 0x80) ? '-' : '+',
1303 (data[34] >> 4) & 0x07, data[34] & 0x0F);
1309 printf ("Data signal input hold 0.%d%d ns\n",
1310 (data[35] >> 4) & 0x0F, data[35] & 0x0F);
1313 printf ("Data signal input hold %c%d.%d ns\n",
1314 (data[35] & 0x80) ? '-' : '+',
1315 (data[35] >> 4) & 0x07, data[35] & 0x0F);
1319 puts ("Manufacturer's JEDEC ID ");
1320 for (j = 64; j <= 71; j++)
1321 printf ("%02X ", data[j]);
1323 printf ("Manufacturing Location %02X\n", data[72]);
1324 puts ("Manufacturer's Part Number ");
1325 for (j = 73; j <= 90; j++)
1326 printf ("%02X ", data[j]);
1328 printf ("Revision Code %02X %02X\n", data[91], data[92]);
1329 printf ("Manufacturing Date %02X %02X\n", data[93], data[94]);
1330 puts ("Assembly Serial Number ");
1331 for (j = 95; j <= 98; j++)
1332 printf ("%02X ", data[j]);
1336 printf ("Speed rating PC%d\n",
1337 data[126] == 0x66 ? 66 : data[126]);
1343 #if defined(CONFIG_I2C_MUX)
1345 * do_i2c_add_bus() - Handle the "i2c bus" command-line command
1346 * @cmdtp: Command data struct pointer
1347 * @flag: Command flag
1348 * @argc: Command-line argument count
1349 * @argv: Array of command-line arguments
1351 * Returns zero always.
1353 static int do_i2c_add_bus(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1358 /* show all busses */
1360 I2C_MUX_DEVICE *device = i2c_mux_devices;
1362 printf ("Busses reached over muxes:\n");
1363 while (device != NULL) {
1364 printf ("Bus ID: %x\n", device->busid);
1365 printf (" reached over Mux(es):\n");
1367 while (mux != NULL) {
1368 printf (" %s@%x ch: %x\n", mux->name, mux->chip, mux->channel);
1371 device = device->next;
1374 (void)i2c_mux_ident_muxstring ((uchar *)argv[1]);
1379 #endif /* CONFIG_I2C_MUX */
1381 #if defined(CONFIG_I2C_MULTI_BUS)
1383 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
1384 * @cmdtp: Command data struct pointer
1385 * @flag: Command flag
1386 * @argc: Command-line argument count
1387 * @argv: Array of command-line arguments
1389 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1392 static int do_i2c_bus_num(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1397 /* querying current setting */
1398 printf("Current bus is %d\n", i2c_get_bus_num());
1400 bus_idx = simple_strtoul(argv[1], NULL, 10);
1401 printf("Setting bus to %d\n", bus_idx);
1402 ret = i2c_set_bus_num(bus_idx);
1404 printf("Failure changing bus number (%d)\n", ret);
1408 #endif /* CONFIG_I2C_MULTI_BUS */
1411 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
1412 * @cmdtp: Command data struct pointer
1413 * @flag: Command flag
1414 * @argc: Command-line argument count
1415 * @argv: Array of command-line arguments
1417 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1420 static int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1425 /* querying current speed */
1426 printf("Current bus speed=%d\n", i2c_get_bus_speed());
1428 speed = simple_strtoul(argv[1], NULL, 10);
1429 printf("Setting bus speed to %d Hz\n", speed);
1430 ret = i2c_set_bus_speed(speed);
1432 printf("Failure changing bus speed (%d)\n", ret);
1438 * do_i2c_mm() - Handle the "i2c mm" command-line command
1439 * @cmdtp: Command data struct pointer
1440 * @flag: Command flag
1441 * @argc: Command-line argument count
1442 * @argv: Array of command-line arguments
1444 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1447 static int do_i2c_mm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1449 return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
1453 * do_i2c_nm() - Handle the "i2c nm" command-line command
1454 * @cmdtp: Command data struct pointer
1455 * @flag: Command flag
1456 * @argc: Command-line argument count
1457 * @argv: Array of command-line arguments
1459 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1462 static int do_i2c_nm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1464 return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
1468 * do_i2c_reset() - Handle the "i2c reset" command-line command
1469 * @cmdtp: Command data struct pointer
1470 * @flag: Command flag
1471 * @argc: Command-line argument count
1472 * @argv: Array of command-line arguments
1474 * Returns zero always.
1476 static int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1478 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
1482 static cmd_tbl_t cmd_i2c_sub[] = {
1483 #if defined(CONFIG_I2C_MUX)
1484 U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_add_bus, "", ""),
1485 #endif /* CONFIG_I2C_MUX */
1486 U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
1487 #if defined(CONFIG_I2C_MULTI_BUS)
1488 U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
1489 #endif /* CONFIG_I2C_MULTI_BUS */
1490 U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
1491 U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
1492 U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
1493 U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
1494 U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
1495 U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
1496 U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
1497 U_BOOT_CMD_MKENT(write, 5, 0, do_i2c_write, "", ""),
1498 U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
1499 #if defined(CONFIG_CMD_SDRAM)
1500 U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
1502 U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
1505 #ifdef CONFIG_NEEDS_MANUAL_RELOC
1506 void i2c_reloc(void) {
1507 fixup_cmdtable(cmd_i2c_sub, ARRAY_SIZE(cmd_i2c_sub));
1512 * do_i2c() - Handle the "i2c" command-line command
1513 * @cmdtp: Command data struct pointer
1514 * @flag: Command flag
1515 * @argc: Command-line argument count
1516 * @argv: Array of command-line arguments
1518 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1521 static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1526 return CMD_RET_USAGE;
1528 /* Strip off leading 'i2c' command argument */
1532 c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));
1535 return c->cmd(cmdtp, flag, argc, argv);
1537 return CMD_RET_USAGE;
1540 /***************************************************/
1541 #ifdef CONFIG_SYS_LONGHELP
1542 static char i2c_help_text[] =
1543 #if defined(CONFIG_I2C_MUX)
1544 "bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\ni2c "
1545 #endif /* CONFIG_I2C_MUX */
1546 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1547 #if defined(CONFIG_I2C_MULTI_BUS)
1548 "i2c dev [dev] - show or set current I2C bus\n"
1549 #endif /* CONFIG_I2C_MULTI_BUS */
1550 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1551 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1552 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1553 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1554 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1555 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
1556 "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
1557 "i2c write memaddress chip address[.0, .1, .2] length - write memory to i2c\n"
1558 "i2c reset - re-init the I2C Controller\n"
1559 #if defined(CONFIG_CMD_SDRAM)
1560 "i2c sdram chip - print SDRAM configuration information\n"
1562 "i2c speed [speed] - show or set I2C bus speed";
1571 #if defined(CONFIG_I2C_MUX)
1572 static int i2c_mux_add_device(I2C_MUX_DEVICE *dev)
1574 I2C_MUX_DEVICE *devtmp = i2c_mux_devices;
1576 if (i2c_mux_devices == NULL) {
1577 i2c_mux_devices = dev;
1580 while (devtmp->next != NULL)
1581 devtmp = devtmp->next;
1587 I2C_MUX_DEVICE *i2c_mux_search_device(int id)
1589 I2C_MUX_DEVICE *device = i2c_mux_devices;
1591 while (device != NULL) {
1592 if (device->busid == id)
1594 device = device->next;
1599 /* searches in the buf from *pos the next ':'.
1601 * 0 if found (with *pos = where)
1602 * < 0 if an error occured
1603 * > 0 if the end of buf is reached
1605 static int i2c_mux_search_next (int *pos, uchar *buf, int len)
1607 while ((buf[*pos] != ':') && (*pos < len)) {
1612 if (buf[*pos] != ':')
1617 static int i2c_mux_get_busid (void)
1619 int tmp = i2c_mux_busid;
1625 /* Analyses a Muxstring and immediately sends the
1626 commands to the muxes. Runs from flash.
1628 int i2c_mux_ident_muxstring_f (uchar *buf)
1633 int len = strlen((char *)buf);
1641 ret = i2c_mux_search_next(&pos, buf, len);
1644 /* search address */
1647 ret = i2c_mux_search_next(&pos, buf, len);
1651 chip = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1653 /* search channel */
1656 ret = i2c_mux_search_next(&pos, buf, len);
1660 if (buf[pos] != 0) {
1664 channel = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1667 if (i2c_write(chip, 0, 0, &channel, 1) != 0) {
1668 printf ("Error setting Mux: chip:%x channel: \
1669 %x\n", chip, channel);
1681 /* Analyses a Muxstring and if this String is correct
1682 * adds a new I2C Bus.
1684 I2C_MUX_DEVICE *i2c_mux_ident_muxstring (uchar *buf)
1686 I2C_MUX_DEVICE *device;
1691 int len = strlen((char *)buf);
1694 device = (I2C_MUX_DEVICE *)malloc (sizeof(I2C_MUX_DEVICE));
1696 device->busid = i2c_mux_get_busid ();
1697 device->next = NULL;
1699 mux = (I2C_MUX *)malloc (sizeof(I2C_MUX));
1701 /* search name of mux */
1703 ret = i2c_mux_search_next(&pos, buf, len);
1705 printf ("%s no name.\n", __FUNCTION__);
1706 mux->name = (char *)malloc (pos - oldpos + 1);
1707 memcpy (mux->name, &buf[oldpos], pos - oldpos);
1708 mux->name[pos - oldpos] = 0;
1709 /* search address */
1712 ret = i2c_mux_search_next(&pos, buf, len);
1714 printf ("%s no mux address.\n", __FUNCTION__);
1716 mux->chip = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1718 /* search channel */
1721 ret = i2c_mux_search_next(&pos, buf, len);
1723 printf ("%s no mux channel.\n", __FUNCTION__);
1725 if (buf[pos] != 0) {
1729 mux->channel = simple_strtoul((char *)&buf[oldpos], NULL, 16);
1732 if (device->mux == NULL)
1735 I2C_MUX *muxtmp = device->mux;
1736 while (muxtmp->next != NULL) {
1737 muxtmp = muxtmp->next;
1746 i2c_mux_add_device (device);
1753 int i2x_mux_select_mux(int bus)
1755 I2C_MUX_DEVICE *dev;
1758 if ((gd->flags & GD_FLG_RELOC) != GD_FLG_RELOC) {
1759 /* select Default Mux Bus */
1760 #if defined(CONFIG_SYS_I2C_IVM_BUS)
1761 i2c_mux_ident_muxstring_f ((uchar *)CONFIG_SYS_I2C_IVM_BUS);
1765 buf = (unsigned char *) getenv("EEprom_ivm");
1767 i2c_mux_ident_muxstring_f (buf);
1772 dev = i2c_mux_search_device(bus);
1777 while (mux != NULL) {
1778 /* do deblocking on each level of mux, before mux config */
1780 if (i2c_write(mux->chip, 0, 0, &mux->channel, 1) != 0) {
1781 printf ("Error setting Mux: chip:%x channel: \
1782 %x\n", mux->chip, mux->channel);
1787 /* do deblocking on each level of mux and after mux config */
1791 #endif /* CONFIG_I2C_MUX */