3 * Sergey Kubushyn, himself, ksi@koi8.net
5 * Changes for unified multibus/multiadapter I2C support.
8 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
10 * See file CREDITS for list of people who contributed to this
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation; either version 2 of
16 * the License, or (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 * I2C Functions similar to the standard memory functions.
32 * There are several parameters in many of the commands that bear further
35 * {i2c_chip} is the I2C chip address (the first byte sent on the bus).
36 * Each I2C chip on the bus has a unique address. On the I2C data bus,
37 * the address is the upper seven bits and the LSB is the "read/write"
38 * bit. Note that the {i2c_chip} address specified on the command
39 * line is not shifted up: e.g. a typical EEPROM memory chip may have
40 * an I2C address of 0x50, but the data put on the bus will be 0xA0
41 * for write and 0xA1 for read. This "non shifted" address notation
42 * matches at least half of the data sheets :-/.
44 * {addr} is the address (or offset) within the chip. Small memory
45 * chips have 8 bit addresses. Large memory chips have 16 bit
46 * addresses. Other memory chips have 9, 10, or 11 bit addresses.
47 * Many non-memory chips have multiple registers and {addr} is used
48 * as the register index. Some non-memory chips have only one register
49 * and therefore don't need any {addr} parameter.
51 * The default {addr} parameter is one byte (.1) which works well for
52 * memories and registers with 8 bits of address space.
54 * You can specify the length of the {addr} field with the optional .0,
55 * .1, or .2 modifier (similar to the .b, .w, .l modifier). If you are
56 * manipulating a single register device which doesn't use an address
57 * field, use "0.0" for the address and the ".0" length field will
58 * suppress the address in the I2C data stream. This also works for
59 * successive reads using the I2C auto-incrementing memory pointer.
61 * If you are manipulating a large memory with 2-byte addresses, use
62 * the .2 address modifier, e.g. 210.2 addresses location 528 (decimal).
64 * Then there are the unfortunate memory chips that spill the most
65 * significant 1, 2, or 3 bits of address into the chip address byte.
66 * This effectively makes one chip (logically) look like 2, 4, or
67 * 8 chips. This is handled (awkwardly) by #defining
68 * CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW and using the .1 modifier on the
69 * {addr} field (since .1 is the default, it doesn't actually have to
70 * be specified). Examples: given a memory chip at I2C chip address
71 * 0x50, the following would happen...
72 * i2c md 50 0 10 display 16 bytes starting at 0x000
73 * On the bus: <S> A0 00 <E> <S> A1 <rd> ... <rd>
74 * i2c md 50 100 10 display 16 bytes starting at 0x100
75 * On the bus: <S> A2 00 <E> <S> A3 <rd> ... <rd>
76 * i2c md 50 210 10 display 16 bytes starting at 0x210
77 * On the bus: <S> A4 10 <E> <S> A5 <rd> ... <rd>
78 * This is awfully ugly. It would be nice if someone would think up
79 * a better way of handling this.
81 * Adapted from cmd_mem.c which is copyright Wolfgang Denk (wd@denx.de).
87 #include <environment.h>
90 #include <asm/byteorder.h>
91 #include <linux/compiler.h>
93 DECLARE_GLOBAL_DATA_PTR;
95 /* Display values from last command.
96 * Memory modify remembered values are different from display memory.
98 static uchar i2c_dp_last_chip;
99 static uint i2c_dp_last_addr;
100 static uint i2c_dp_last_alen;
101 static uint i2c_dp_last_length = 0x10;
103 static uchar i2c_mm_last_chip;
104 static uint i2c_mm_last_addr;
105 static uint i2c_mm_last_alen;
107 /* If only one I2C bus is present, the list of devices to ignore when
108 * the probe command is issued is represented by a 1D array of addresses.
109 * When multiple buses are present, the list is an array of bus-address
110 * pairs. The following macros take care of this */
112 #if defined(CONFIG_SYS_I2C_NOPROBES)
113 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS)
118 } i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
119 #define GET_BUS_NUM i2c_get_bus_num()
120 #define COMPARE_BUS(b,i) (i2c_no_probes[(i)].bus == (b))
121 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)].addr == (a))
122 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)].addr
123 #else /* single bus */
124 static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
125 #define GET_BUS_NUM 0
126 #define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */
127 #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a))
128 #define NO_PROBE_ADDR(i) i2c_no_probes[(i)]
129 #endif /* defined(CONFIG_SYS_I2C) */
131 #define NUM_ELEMENTS_NOPROBE (sizeof(i2c_no_probes)/sizeof(i2c_no_probes[0]))
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)
148 /* TODO: Implement architecture-specific get/set functions */
151 * i2c_get_bus_speed() - Return I2C bus speed
153 * This function is the default implementation of function for retrieveing
154 * the current I2C bus speed in Hz.
156 * A driver implementing runtime switching of I2C bus speed must override
157 * this function to report the speed correctly. Simple or legacy drivers
158 * can use this fallback.
160 * Returns I2C bus speed in Hz.
162 #if !defined(CONFIG_SYS_I2C)
164 * TODO: Implement architecture-specific get/set functions
165 * Should go away, if we switched completely to new multibus support
168 unsigned int i2c_get_bus_speed(void)
170 return CONFIG_SYS_I2C_SPEED;
174 * i2c_set_bus_speed() - Configure I2C bus speed
175 * @speed: Newly set speed of the I2C bus in Hz
177 * This function is the default implementation of function for setting
178 * the I2C bus speed in Hz.
180 * A driver implementing runtime switching of I2C bus speed must override
181 * this function to report the speed correctly. Simple or legacy drivers
182 * can use this fallback.
184 * Returns zero on success, negative value on error.
187 int i2c_set_bus_speed(unsigned int speed)
189 if (speed != CONFIG_SYS_I2C_SPEED)
197 * get_alen() - Small parser helper function to get address length
199 * Returns the address length.
201 static uint get_alen(char *arg)
207 for (j = 0; j < 8; j++) {
209 alen = arg[j+1] - '0';
211 } else if (arg[j] == '\0')
218 * do_i2c_read() - Handle the "i2c read" command-line command
219 * @cmdtp: Command data struct pointer
220 * @flag: Command flag
221 * @argc: Command-line argument count
222 * @argv: Array of command-line arguments
224 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
228 * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
230 static int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
233 uint devaddr, alen, length;
237 return CMD_RET_USAGE;
242 chip = simple_strtoul(argv[1], NULL, 16);
245 * I2C data address within the chip. This can be 1 or
246 * 2 bytes long. Some day it might be 3 bytes long :-).
248 devaddr = simple_strtoul(argv[2], NULL, 16);
249 alen = get_alen(argv[2]);
251 return CMD_RET_USAGE;
254 * Length is the number of objects, not number of bytes.
256 length = simple_strtoul(argv[3], NULL, 16);
259 * memaddr is the address where to store things in memory
261 memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);
263 if (i2c_read(chip, devaddr, alen, memaddr, length) != 0) {
264 puts ("Error reading the chip.\n");
270 static int do_i2c_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
273 uint devaddr, alen, length;
277 return cmd_usage(cmdtp);
280 * memaddr is the address where to store things in memory
282 memaddr = (u_char *)simple_strtoul(argv[1], NULL, 16);
287 chip = simple_strtoul(argv[2], NULL, 16);
290 * I2C data address within the chip. This can be 1 or
291 * 2 bytes long. Some day it might be 3 bytes long :-).
293 devaddr = simple_strtoul(argv[3], NULL, 16);
294 alen = get_alen(argv[3]);
296 return cmd_usage(cmdtp);
299 * Length is the number of objects, not number of bytes.
301 length = simple_strtoul(argv[4], NULL, 16);
303 while (length-- > 0) {
304 if (i2c_write(chip, devaddr++, alen, memaddr++, 1) != 0) {
305 puts("Error writing to the chip.\n");
309 * No write delay with FRAM devices.
311 #if !defined(CONFIG_SYS_I2C_FRAM)
319 * do_i2c_md() - Handle the "i2c md" command-line command
320 * @cmdtp: Command data struct pointer
321 * @flag: Command flag
322 * @argc: Command-line argument count
323 * @argv: Array of command-line arguments
325 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
329 * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
331 static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
334 uint addr, alen, length;
335 int j, nbytes, linebytes;
337 /* We use the last specified parameters, unless new ones are
340 chip = i2c_dp_last_chip;
341 addr = i2c_dp_last_addr;
342 alen = i2c_dp_last_alen;
343 length = i2c_dp_last_length;
346 return CMD_RET_USAGE;
348 if ((flag & CMD_FLAG_REPEAT) == 0) {
350 * New command specified.
356 chip = simple_strtoul(argv[1], NULL, 16);
359 * I2C data address within the chip. This can be 1 or
360 * 2 bytes long. Some day it might be 3 bytes long :-).
362 addr = simple_strtoul(argv[2], NULL, 16);
363 alen = get_alen(argv[2]);
365 return CMD_RET_USAGE;
368 * If another parameter, it is the length to display.
369 * Length is the number of objects, not number of bytes.
372 length = simple_strtoul(argv[3], NULL, 16);
378 * We buffer all read data, so we can make sure data is read only
383 unsigned char linebuf[DISP_LINE_LEN];
386 linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
388 if (i2c_read(chip, addr, alen, linebuf, linebytes) != 0)
389 puts ("Error reading the chip.\n");
391 printf("%04x:", addr);
393 for (j=0; j<linebytes; j++) {
394 printf(" %02x", *cp++);
399 for (j=0; j<linebytes; j++) {
400 if ((*cp < 0x20) || (*cp > 0x7e))
409 } while (nbytes > 0);
411 i2c_dp_last_chip = chip;
412 i2c_dp_last_addr = addr;
413 i2c_dp_last_alen = alen;
414 i2c_dp_last_length = length;
420 * do_i2c_mw() - Handle the "i2c mw" command-line command
421 * @cmdtp: Command data struct pointer
422 * @flag: Command flag
423 * @argc: Command-line argument count
424 * @argv: Array of command-line arguments
426 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
430 * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
432 static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
440 if ((argc < 4) || (argc > 5))
441 return CMD_RET_USAGE;
444 * Chip is always specified.
446 chip = simple_strtoul(argv[1], NULL, 16);
449 * Address is always specified.
451 addr = simple_strtoul(argv[2], NULL, 16);
452 alen = get_alen(argv[2]);
454 return CMD_RET_USAGE;
457 * Value to write is always specified.
459 byte = simple_strtoul(argv[3], NULL, 16);
465 count = simple_strtoul(argv[4], NULL, 16);
469 while (count-- > 0) {
470 if (i2c_write(chip, addr++, alen, &byte, 1) != 0)
471 puts ("Error writing the chip.\n");
473 * Wait for the write to complete. The write can take
474 * up to 10mSec (we allow a little more time).
477 * No write delay with FRAM devices.
479 #if !defined(CONFIG_SYS_I2C_FRAM)
488 * do_i2c_crc() - Handle the "i2c crc32" command-line command
489 * @cmdtp: Command data struct pointer
490 * @flag: Command flag
491 * @argc: Command-line argument count
492 * @argv: Array of command-line arguments
494 * Calculate a CRC on memory
496 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
500 * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
502 static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
513 return CMD_RET_USAGE;
516 * Chip is always specified.
518 chip = simple_strtoul(argv[1], NULL, 16);
521 * Address is always specified.
523 addr = simple_strtoul(argv[2], NULL, 16);
524 alen = get_alen(argv[2]);
526 return CMD_RET_USAGE;
529 * Count is always specified
531 count = simple_strtoul(argv[3], NULL, 16);
533 printf ("CRC32 for %08lx ... %08lx ==> ", addr, addr + count - 1);
535 * CRC a byte at a time. This is going to be slooow, but hey, the
536 * memories are small and slow too so hopefully nobody notices.
540 while (count-- > 0) {
541 if (i2c_read(chip, addr, alen, &byte, 1) != 0)
543 crc = crc32 (crc, &byte, 1);
547 puts ("Error reading the chip,\n");
549 printf ("%08lx\n", crc);
555 * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
556 * @cmdtp: Command data struct pointer
557 * @flag: Command flag
558 * @argc: Command-line argument count
559 * @argv: Array of command-line arguments
563 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
567 * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
568 * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2}
571 mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const argv[])
581 return CMD_RET_USAGE;
583 #ifdef CONFIG_BOOT_RETRY_TIME
584 reset_cmd_timeout(); /* got a good command to get here */
587 * We use the last specified parameters, unless new ones are
590 chip = i2c_mm_last_chip;
591 addr = i2c_mm_last_addr;
592 alen = i2c_mm_last_alen;
594 if ((flag & CMD_FLAG_REPEAT) == 0) {
596 * New command specified. Check for a size specification.
597 * Defaults to byte if no or incorrect specification.
599 size = cmd_get_data_size(argv[0], 1);
602 * Chip is always specified.
604 chip = simple_strtoul(argv[1], NULL, 16);
607 * Address is always specified.
609 addr = simple_strtoul(argv[2], NULL, 16);
610 alen = get_alen(argv[2]);
612 return CMD_RET_USAGE;
616 * Print the address, followed by value. Then accept input for
617 * the next value. A non-converted value exits.
620 printf("%08lx:", addr);
621 if (i2c_read(chip, addr, alen, (uchar *)&data, size) != 0)
622 puts ("\nError reading the chip,\n");
624 data = cpu_to_be32(data);
626 printf(" %02lx", (data >> 24) & 0x000000FF);
628 printf(" %04lx", (data >> 16) & 0x0000FFFF);
630 printf(" %08lx", data);
633 nbytes = readline (" ? ");
636 * <CR> pressed as only input, don't modify current
637 * location and move to next.
642 #ifdef CONFIG_BOOT_RETRY_TIME
643 reset_cmd_timeout(); /* good enough to not time out */
646 #ifdef CONFIG_BOOT_RETRY_TIME
647 else if (nbytes == -2)
648 break; /* timed out, exit the command */
653 data = simple_strtoul(console_buffer, &endp, 16);
658 data = be32_to_cpu(data);
659 nbytes = endp - console_buffer;
661 #ifdef CONFIG_BOOT_RETRY_TIME
663 * good enough to not time out
667 if (i2c_write(chip, addr, alen, (uchar *)&data, size) != 0)
668 puts ("Error writing the chip.\n");
669 #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
670 udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
678 i2c_mm_last_chip = chip;
679 i2c_mm_last_addr = addr;
680 i2c_mm_last_alen = alen;
686 * do_i2c_probe() - Handle the "i2c probe" command-line command
687 * @cmdtp: Command data struct pointer
688 * @flag: Command flag
689 * @argc: Command-line argument count
690 * @argv: Array of command-line arguments
692 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
698 * Returns zero (success) if one or more I2C devices was found
700 static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
705 #if defined(CONFIG_SYS_I2C_NOPROBES)
707 unsigned int bus = GET_BUS_NUM;
708 #endif /* NOPROBES */
711 addr = simple_strtol(argv[1], 0, 16);
713 puts ("Valid chip addresses:");
714 for (j = 0; j < 128; j++) {
715 if ((0 <= addr) && (j != addr))
718 #if defined(CONFIG_SYS_I2C_NOPROBES)
720 for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
721 if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
729 if (i2c_probe(j) == 0) {
736 #if defined(CONFIG_SYS_I2C_NOPROBES)
737 puts ("Excluded chip addresses:");
738 for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
739 if (COMPARE_BUS(bus,k))
740 printf(" %02X", NO_PROBE_ADDR(k));
749 * do_i2c_loop() - Handle the "i2c loop" command-line command
750 * @cmdtp: Command data struct pointer
751 * @flag: Command flag
752 * @argc: Command-line argument count
753 * @argv: Array of command-line arguments
755 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
759 * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}]
760 * {length} - Number of bytes to read
761 * {delay} - A DECIMAL number and defaults to 1000 uSec
763 static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
773 return CMD_RET_USAGE;
776 * Chip is always specified.
778 chip = simple_strtoul(argv[1], NULL, 16);
781 * Address is always specified.
783 addr = simple_strtoul(argv[2], NULL, 16);
784 alen = get_alen(argv[2]);
786 return CMD_RET_USAGE;
789 * Length is the number of objects, not number of bytes.
792 length = simple_strtoul(argv[3], NULL, 16);
793 if (length > sizeof(bytes))
794 length = sizeof(bytes);
797 * The delay time (uSec) is optional.
801 delay = simple_strtoul(argv[4], NULL, 10);
806 if (i2c_read(chip, addr, alen, bytes, length) != 0)
807 puts ("Error reading the chip.\n");
816 * The SDRAM command is separately configured because many
817 * (most?) embedded boards don't use SDRAM DIMMs.
819 * FIXME: Document and probably move elsewhere!
821 #if defined(CONFIG_CMD_SDRAM)
822 static void print_ddr2_tcyc (u_char const b)
824 printf ("%d.", (b >> 4) & 0x0F);
836 printf ("%d ns\n", b & 0x0F);
856 static void decode_bits (u_char const b, char const *str[], int const do_once)
860 for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) {
871 * i2c sdram {i2c_chip}
873 static int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
875 enum { unknown, EDO, SDRAM, DDR2 } type;
882 static const char *decode_CAS_DDR2[] = {
883 " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD"
886 static const char *decode_CAS_default[] = {
887 " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1"
890 static const char *decode_CS_WE_default[] = {
891 " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0"
894 static const char *decode_byte21_default[] = {
896 " Redundant row address\n",
897 " Differential clock input\n",
898 " Registerd DQMB inputs\n",
899 " Buffered DQMB inputs\n",
901 " Registered address/control lines\n",
902 " Buffered address/control lines\n"
905 static const char *decode_byte22_DDR2[] = {
911 " Supports partial array self refresh\n",
912 " Supports 50 ohm ODT\n",
913 " Supports weak driver\n"
916 static const char *decode_row_density_DDR2[] = {
917 "512 MiB", "256 MiB", "128 MiB", "16 GiB",
918 "8 GiB", "4 GiB", "2 GiB", "1 GiB"
921 static const char *decode_row_density_default[] = {
922 "512 MiB", "256 MiB", "128 MiB", "64 MiB",
923 "32 MiB", "16 MiB", "8 MiB", "4 MiB"
927 return CMD_RET_USAGE;
930 * Chip is always specified.
932 chip = simple_strtoul (argv[1], NULL, 16);
934 if (i2c_read (chip, 0, 1, data, sizeof (data)) != 0) {
935 puts ("No SDRAM Serial Presence Detect found.\n");
940 for (j = 0; j < 63; j++) {
943 if (cksum != data[63]) {
944 printf ("WARNING: Configuration data checksum failure:\n"
945 " is 0x%02x, calculated 0x%02x\n", data[63], cksum);
947 printf ("SPD data revision %d.%d\n",
948 (data[62] >> 4) & 0x0F, data[62] & 0x0F);
949 printf ("Bytes used 0x%02X\n", data[0]);
950 printf ("Serial memory size 0x%02X\n", 1 << data[1]);
952 puts ("Memory type ");
972 puts ("Row address bits ");
973 if ((data[3] & 0x00F0) == 0)
974 printf ("%d\n", data[3] & 0x0F);
976 printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);
978 puts ("Column address bits ");
979 if ((data[4] & 0x00F0) == 0)
980 printf ("%d\n", data[4] & 0x0F);
982 printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);
986 printf ("Number of ranks %d\n",
987 (data[5] & 0x07) + 1);
990 printf ("Module rows %d\n", data[5]);
996 printf ("Module data width %d bits\n", data[6]);
999 printf ("Module data width %d bits\n",
1000 (data[7] << 8) | data[6]);
1004 puts ("Interface signal levels ");
1006 case 0: puts ("TTL 5.0 V\n"); break;
1007 case 1: puts ("LVTTL\n"); break;
1008 case 2: puts ("HSTL 1.5 V\n"); break;
1009 case 3: puts ("SSTL 3.3 V\n"); break;
1010 case 4: puts ("SSTL 2.5 V\n"); break;
1011 case 5: puts ("SSTL 1.8 V\n"); break;
1012 default: puts ("unknown\n"); break;
1017 printf ("SDRAM cycle time ");
1018 print_ddr2_tcyc (data[9]);
1021 printf ("SDRAM cycle time %d.%d ns\n",
1022 (data[9] >> 4) & 0x0F, data[9] & 0x0F);
1028 printf ("SDRAM access time 0.%d%d ns\n",
1029 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1032 printf ("SDRAM access time %d.%d ns\n",
1033 (data[10] >> 4) & 0x0F, data[10] & 0x0F);
1037 puts ("EDC configuration ");
1039 case 0: puts ("None\n"); break;
1040 case 1: puts ("Parity\n"); break;
1041 case 2: puts ("ECC\n"); break;
1042 default: puts ("unknown\n"); break;
1045 if ((data[12] & 0x80) == 0)
1046 puts ("No self refresh, rate ");
1048 puts ("Self refresh, rate ");
1050 switch(data[12] & 0x7F) {
1051 case 0: puts ("15.625 us\n"); break;
1052 case 1: puts ("3.9 us\n"); break;
1053 case 2: puts ("7.8 us\n"); break;
1054 case 3: puts ("31.3 us\n"); break;
1055 case 4: puts ("62.5 us\n"); break;
1056 case 5: puts ("125 us\n"); break;
1057 default: puts ("unknown\n"); break;
1062 printf ("SDRAM width (primary) %d\n", data[13]);
1065 printf ("SDRAM width (primary) %d\n", data[13] & 0x7F);
1066 if ((data[13] & 0x80) != 0) {
1067 printf (" (second bank) %d\n",
1068 2 * (data[13] & 0x7F));
1076 printf ("EDC width %d\n", data[14]);
1079 if (data[14] != 0) {
1080 printf ("EDC width %d\n",
1083 if ((data[14] & 0x80) != 0) {
1084 printf (" (second bank) %d\n",
1085 2 * (data[14] & 0x7F));
1092 printf ("Min clock delay, back-to-back random column addresses "
1096 puts ("Burst length(s) ");
1097 if (data[16] & 0x80) puts (" Page");
1098 if (data[16] & 0x08) puts (" 8");
1099 if (data[16] & 0x04) puts (" 4");
1100 if (data[16] & 0x02) puts (" 2");
1101 if (data[16] & 0x01) puts (" 1");
1103 printf ("Number of banks %d\n", data[17]);
1107 puts ("CAS latency(s) ");
1108 decode_bits (data[18], decode_CAS_DDR2, 0);
1112 puts ("CAS latency(s) ");
1113 decode_bits (data[18], decode_CAS_default, 0);
1119 puts ("CS latency(s) ");
1120 decode_bits (data[19], decode_CS_WE_default, 0);
1125 puts ("WE latency(s) ");
1126 decode_bits (data[20], decode_CS_WE_default, 0);
1132 puts ("Module attributes:\n");
1133 if (data[21] & 0x80)
1134 puts (" TBD (bit 7)\n");
1135 if (data[21] & 0x40)
1136 puts (" Analysis probe installed\n");
1137 if (data[21] & 0x20)
1138 puts (" TBD (bit 5)\n");
1139 if (data[21] & 0x10)
1140 puts (" FET switch external enable\n");
1141 printf (" %d PLLs on DIMM\n", (data[21] >> 2) & 0x03);
1142 if (data[20] & 0x11) {
1143 printf (" %d active registers on DIMM\n",
1144 (data[21] & 0x03) + 1);
1148 puts ("Module attributes:\n");
1152 decode_bits (data[21], decode_byte21_default, 0);
1158 decode_bits (data[22], decode_byte22_DDR2, 0);
1161 puts ("Device attributes:\n");
1162 if (data[22] & 0x80) puts (" TBD (bit 7)\n");
1163 if (data[22] & 0x40) puts (" TBD (bit 6)\n");
1164 if (data[22] & 0x20) puts (" Upper Vcc tolerance 5%\n");
1165 else puts (" Upper Vcc tolerance 10%\n");
1166 if (data[22] & 0x10) puts (" Lower Vcc tolerance 5%\n");
1167 else puts (" Lower Vcc tolerance 10%\n");
1168 if (data[22] & 0x08) puts (" Supports write1/read burst\n");
1169 if (data[22] & 0x04) puts (" Supports precharge all\n");
1170 if (data[22] & 0x02) puts (" Supports auto precharge\n");
1171 if (data[22] & 0x01) puts (" Supports early RAS# precharge\n");
1177 printf ("SDRAM cycle time (2nd highest CAS latency) ");
1178 print_ddr2_tcyc (data[23]);
1181 printf ("SDRAM cycle time (2nd highest CAS latency) %d."
1182 "%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F);
1188 printf ("SDRAM access from clock (2nd highest CAS latency) 0."
1189 "%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1192 printf ("SDRAM access from clock (2nd highest CAS latency) %d."
1193 "%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F);
1199 printf ("SDRAM cycle time (3rd highest CAS latency) ");
1200 print_ddr2_tcyc (data[25]);
1203 printf ("SDRAM cycle time (3rd highest CAS latency) %d."
1204 "%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F);
1210 printf ("SDRAM access from clock (3rd highest CAS latency) 0."
1211 "%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1214 printf ("SDRAM access from clock (3rd highest CAS latency) %d."
1215 "%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F);
1221 printf ("Minimum row precharge %d.%02d ns\n",
1222 (data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03));
1225 printf ("Minimum row precharge %d ns\n", data[27]);
1231 printf ("Row active to row active min %d.%02d ns\n",
1232 (data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03));
1235 printf ("Row active to row active min %d ns\n", data[28]);
1241 printf ("RAS to CAS delay min %d.%02d ns\n",
1242 (data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03));
1245 printf ("RAS to CAS delay min %d ns\n", data[29]);
1249 printf ("Minimum RAS pulse width %d ns\n", data[30]);
1253 puts ("Density of each row ");
1254 decode_bits (data[31], decode_row_density_DDR2, 1);
1258 puts ("Density of each row ");
1259 decode_bits (data[31], decode_row_density_default, 1);
1266 puts ("Command and Address setup ");
1267 if (data[32] >= 0xA0) {
1268 printf ("1.%d%d ns\n",
1269 ((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F);
1271 printf ("0.%d%d ns\n",
1272 ((data[32] >> 4) & 0x0F), data[32] & 0x0F);
1276 printf ("Command and Address setup %c%d.%d ns\n",
1277 (data[32] & 0x80) ? '-' : '+',
1278 (data[32] >> 4) & 0x07, data[32] & 0x0F);
1284 puts ("Command and Address hold ");
1285 if (data[33] >= 0xA0) {
1286 printf ("1.%d%d ns\n",
1287 ((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F);
1289 printf ("0.%d%d ns\n",
1290 ((data[33] >> 4) & 0x0F), data[33] & 0x0F);
1294 printf ("Command and Address hold %c%d.%d ns\n",
1295 (data[33] & 0x80) ? '-' : '+',
1296 (data[33] >> 4) & 0x07, data[33] & 0x0F);
1302 printf ("Data signal input setup 0.%d%d ns\n",
1303 (data[34] >> 4) & 0x0F, data[34] & 0x0F);
1306 printf ("Data signal input setup %c%d.%d ns\n",
1307 (data[34] & 0x80) ? '-' : '+',
1308 (data[34] >> 4) & 0x07, data[34] & 0x0F);
1314 printf ("Data signal input hold 0.%d%d ns\n",
1315 (data[35] >> 4) & 0x0F, data[35] & 0x0F);
1318 printf ("Data signal input hold %c%d.%d ns\n",
1319 (data[35] & 0x80) ? '-' : '+',
1320 (data[35] >> 4) & 0x07, data[35] & 0x0F);
1324 puts ("Manufacturer's JEDEC ID ");
1325 for (j = 64; j <= 71; j++)
1326 printf ("%02X ", data[j]);
1328 printf ("Manufacturing Location %02X\n", data[72]);
1329 puts ("Manufacturer's Part Number ");
1330 for (j = 73; j <= 90; j++)
1331 printf ("%02X ", data[j]);
1333 printf ("Revision Code %02X %02X\n", data[91], data[92]);
1334 printf ("Manufacturing Date %02X %02X\n", data[93], data[94]);
1335 puts ("Assembly Serial Number ");
1336 for (j = 95; j <= 98; j++)
1337 printf ("%02X ", data[j]);
1341 printf ("Speed rating PC%d\n",
1342 data[126] == 0x66 ? 66 : data[126]);
1350 * i2c edid {i2c_chip}
1352 #if defined(CONFIG_I2C_EDID)
1353 int do_edid(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
1356 struct edid1_info edid;
1363 chip = simple_strtoul(argv[1], NULL, 16);
1364 if (i2c_read(chip, 0, 1, (uchar *)&edid, sizeof(edid)) != 0) {
1365 puts("Error reading EDID content.\n");
1369 if (edid_check_info(&edid)) {
1370 puts("Content isn't valid EDID.\n");
1374 edid_print_info(&edid);
1378 #endif /* CONFIG_I2C_EDID */
1381 * do_i2c_show_bus() - Handle the "i2c bus" command-line command
1382 * @cmdtp: Command data struct pointer
1383 * @flag: Command flag
1384 * @argc: Command-line argument count
1385 * @argv: Array of command-line arguments
1387 * Returns zero always.
1389 #if defined(CONFIG_SYS_I2C)
1390 int do_i2c_show_bus(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1393 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1398 /* show all busses */
1399 for (i = 0; i < CONFIG_SYS_NUM_I2C_BUSES; i++) {
1400 printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
1401 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1402 for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
1403 if (i2c_bus[i].next_hop[j].chip == 0)
1405 printf("->%s@0x%2x:%d",
1406 i2c_bus[i].next_hop[j].mux.name,
1407 i2c_bus[i].next_hop[j].chip,
1408 i2c_bus[i].next_hop[j].channel);
1414 /* show specific bus */
1415 i = simple_strtoul(argv[1], NULL, 10);
1416 if (i >= CONFIG_SYS_NUM_I2C_BUSES) {
1417 printf("Invalid bus %d\n", i);
1420 printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
1421 #ifndef CONFIG_SYS_I2C_DIRECT_BUS
1422 for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
1423 if (i2c_bus[i].next_hop[j].chip == 0)
1425 printf("->%s@0x%2x:%d",
1426 i2c_bus[i].next_hop[j].mux.name,
1427 i2c_bus[i].next_hop[j].chip,
1428 i2c_bus[i].next_hop[j].channel);
1439 * do_i2c_bus_num() - Handle the "i2c dev" command-line command
1440 * @cmdtp: Command data struct pointer
1441 * @flag: Command flag
1442 * @argc: Command-line argument count
1443 * @argv: Array of command-line arguments
1445 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1448 #if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS)
1449 int do_i2c_bus_num(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1452 unsigned int bus_no;
1455 /* querying current setting */
1456 printf("Current bus is %d\n", i2c_get_bus_num());
1458 bus_no = simple_strtoul(argv[1], NULL, 10);
1459 if (bus_no >= CONFIG_SYS_NUM_I2C_BUSES) {
1460 printf("Invalid bus %d\n", bus_no);
1463 printf("Setting bus to %d\n", bus_no);
1464 ret = i2c_set_bus_num(bus_no);
1466 printf("Failure changing bus number (%d)\n", ret);
1470 #endif /* defined(CONFIG_SYS_I2C) */
1473 * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
1474 * @cmdtp: Command data struct pointer
1475 * @flag: Command flag
1476 * @argc: Command-line argument count
1477 * @argv: Array of command-line arguments
1479 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1482 static int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1487 /* querying current speed */
1488 printf("Current bus speed=%d\n", i2c_get_bus_speed());
1490 speed = simple_strtoul(argv[1], NULL, 10);
1491 printf("Setting bus speed to %d Hz\n", speed);
1492 ret = i2c_set_bus_speed(speed);
1494 printf("Failure changing bus speed (%d)\n", ret);
1500 * do_i2c_mm() - Handle the "i2c mm" command-line command
1501 * @cmdtp: Command data struct pointer
1502 * @flag: Command flag
1503 * @argc: Command-line argument count
1504 * @argv: Array of command-line arguments
1506 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1509 static int do_i2c_mm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1511 return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
1515 * do_i2c_nm() - Handle the "i2c nm" command-line command
1516 * @cmdtp: Command data struct pointer
1517 * @flag: Command flag
1518 * @argc: Command-line argument count
1519 * @argv: Array of command-line arguments
1521 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1524 static int do_i2c_nm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1526 return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
1530 * do_i2c_reset() - Handle the "i2c reset" command-line command
1531 * @cmdtp: Command data struct pointer
1532 * @flag: Command flag
1533 * @argc: Command-line argument count
1534 * @argv: Array of command-line arguments
1536 * Returns zero always.
1538 static int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1540 #if defined(CONFIG_SYS_I2C)
1541 i2c_init(I2C_ADAP->speed, I2C_ADAP->slaveaddr);
1543 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
1548 static cmd_tbl_t cmd_i2c_sub[] = {
1549 #if defined(CONFIG_SYS_I2C)
1550 U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_show_bus, "", ""),
1552 U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
1553 #if defined(CONFIG_SYS_I2C) || \
1554 defined(CONFIG_I2C_MULTI_BUS)
1555 U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
1556 #endif /* CONFIG_I2C_MULTI_BUS */
1557 #if defined(CONFIG_I2C_EDID)
1558 U_BOOT_CMD_MKENT(edid, 1, 1, do_edid, "", ""),
1559 #endif /* CONFIG_I2C_EDID */
1560 U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
1561 U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
1562 U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
1563 U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
1564 U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
1565 U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
1566 U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
1567 U_BOOT_CMD_MKENT(write, 5, 0, do_i2c_write, "", ""),
1568 U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
1569 #if defined(CONFIG_CMD_SDRAM)
1570 U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
1572 U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
1575 #ifdef CONFIG_NEEDS_MANUAL_RELOC
1576 void i2c_reloc(void) {
1577 fixup_cmdtable(cmd_i2c_sub, ARRAY_SIZE(cmd_i2c_sub));
1582 * do_i2c() - Handle the "i2c" command-line command
1583 * @cmdtp: Command data struct pointer
1584 * @flag: Command flag
1585 * @argc: Command-line argument count
1586 * @argv: Array of command-line arguments
1588 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
1591 static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
1596 return CMD_RET_USAGE;
1598 /* Strip off leading 'i2c' command argument */
1602 c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));
1605 return c->cmd(cmdtp, flag, argc, argv);
1607 return CMD_RET_USAGE;
1610 /***************************************************/
1611 #ifdef CONFIG_SYS_LONGHELP
1612 static char i2c_help_text[] =
1613 #if defined(CONFIG_SYS_I2C)
1614 "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
1616 "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
1617 #if defined(CONFIG_SYS_I2C) || \
1618 defined(CONFIG_I2C_MULTI_BUS)
1619 "i2c dev [dev] - show or set current I2C bus\n"
1620 #endif /* CONFIG_I2C_MULTI_BUS */
1621 #if defined(CONFIG_I2C_EDID)
1622 "i2c edid chip - print EDID configuration information\n"
1623 #endif /* CONFIG_I2C_EDID */
1624 "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
1625 "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n"
1626 "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n"
1627 "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n"
1628 "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n"
1629 "i2c probe [address] - test for and show device(s) on the I2C bus\n"
1630 "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
1631 "i2c write memaddress chip address[.0, .1, .2] length - write memory to i2c\n"
1632 "i2c reset - re-init the I2C Controller\n"
1633 #if defined(CONFIG_CMD_SDRAM)
1634 "i2c sdram chip - print SDRAM configuration information\n"
1636 "i2c speed [speed] - show or set I2C bus speed";