/* * (C) Copyright 2001 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ /* * I2C Functions similar to the standard memory functions. * * There are several parameters in many of the commands that bear further * explanations: * * {i2c_chip} is the I2C chip address (the first byte sent on the bus). * Each I2C chip on the bus has a unique address. On the I2C data bus, * the address is the upper seven bits and the LSB is the "read/write" * bit. Note that the {i2c_chip} address specified on the command * line is not shifted up: e.g. a typical EEPROM memory chip may have * an I2C address of 0x50, but the data put on the bus will be 0xA0 * for write and 0xA1 for read. This "non shifted" address notation * matches at least half of the data sheets :-/. * * {addr} is the address (or offset) within the chip. Small memory * chips have 8 bit addresses. Large memory chips have 16 bit * addresses. Other memory chips have 9, 10, or 11 bit addresses. * Many non-memory chips have multiple registers and {addr} is used * as the register index. Some non-memory chips have only one register * and therefore don't need any {addr} parameter. * * The default {addr} parameter is one byte (.1) which works well for * memories and registers with 8 bits of address space. * * You can specify the length of the {addr} field with the optional .0, * .1, or .2 modifier (similar to the .b, .w, .l modifier). If you are * manipulating a single register device which doesn't use an address * field, use "0.0" for the address and the ".0" length field will * suppress the address in the I2C data stream. This also works for * successive reads using the I2C auto-incrementing memory pointer. * * If you are manipulating a large memory with 2-byte addresses, use * the .2 address modifier, e.g. 210.2 addresses location 528 (decimal). * * Then there are the unfortunate memory chips that spill the most * significant 1, 2, or 3 bits of address into the chip address byte. * This effectively makes one chip (logically) look like 2, 4, or * 8 chips. This is handled (awkwardly) by #defining * CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW and using the .1 modifier on the * {addr} field (since .1 is the default, it doesn't actually have to * be specified). Examples: given a memory chip at I2C chip address * 0x50, the following would happen... * i2c md 50 0 10 display 16 bytes starting at 0x000 * On the bus: <S> A0 00 <E> <S> A1 <rd> ... <rd> * i2c md 50 100 10 display 16 bytes starting at 0x100 * On the bus: <S> A2 00 <E> <S> A3 <rd> ... <rd> * i2c md 50 210 10 display 16 bytes starting at 0x210 * On the bus: <S> A4 10 <E> <S> A5 <rd> ... <rd> * This is awfully ugly. It would be nice if someone would think up * a better way of handling this. * * Adapted from cmd_mem.c which is copyright Wolfgang Denk (wd@denx.de). */ #include <common.h> #include <command.h> #include <environment.h> #include <i2c.h> #include <malloc.h> #include <asm/byteorder.h> /* Display values from last command. * Memory modify remembered values are different from display memory. */ static uchar i2c_dp_last_chip; static uint i2c_dp_last_addr; static uint i2c_dp_last_alen; static uint i2c_dp_last_length = 0x10; static uchar i2c_mm_last_chip; static uint i2c_mm_last_addr; static uint i2c_mm_last_alen; /* If only one I2C bus is present, the list of devices to ignore when * the probe command is issued is represented by a 1D array of addresses. * When multiple buses are present, the list is an array of bus-address * pairs. The following macros take care of this */ #if defined(CONFIG_SYS_I2C_NOPROBES) #if defined(CONFIG_I2C_MULTI_BUS) static struct { uchar bus; uchar addr; } i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES; #define GET_BUS_NUM i2c_get_bus_num() #define COMPARE_BUS(b,i) (i2c_no_probes[(i)].bus == (b)) #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)].addr == (a)) #define NO_PROBE_ADDR(i) i2c_no_probes[(i)].addr #else /* single bus */ static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES; #define GET_BUS_NUM 0 #define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */ #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a)) #define NO_PROBE_ADDR(i) i2c_no_probes[(i)] #endif /* CONFIG_MULTI_BUS */ #define NUM_ELEMENTS_NOPROBE (sizeof(i2c_no_probes)/sizeof(i2c_no_probes[0])) #endif #if defined(CONFIG_I2C_MUX) static I2C_MUX_DEVICE *i2c_mux_devices = NULL; static int i2c_mux_busid = CONFIG_SYS_MAX_I2C_BUS; DECLARE_GLOBAL_DATA_PTR; #endif #define DISP_LINE_LEN 16 /* TODO: Implement architecture-specific get/set functions */ unsigned int __def_i2c_get_bus_speed(void) { return CONFIG_SYS_I2C_SPEED; } unsigned int i2c_get_bus_speed(void) __attribute__((weak, alias("__def_i2c_get_bus_speed"))); int __def_i2c_set_bus_speed(unsigned int speed) { if (speed != CONFIG_SYS_I2C_SPEED) return -1; return 0; } int i2c_set_bus_speed(unsigned int) __attribute__((weak, alias("__def_i2c_set_bus_speed"))); /* * get_alen: small parser helper function to get address length * returns the address length,or 0 on error */ static uint get_alen(char *arg) { int j; int alen; alen = 1; for (j = 0; j < 8; j++) { if (arg[j] == '.') { alen = arg[j+1] - '0'; if (alen > 3) { return 0; } break; } else if (arg[j] == '\0') break; } return alen; } /* * Syntax: * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr} */ static int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { u_char chip; uint devaddr, alen, length; u_char *memaddr; if (argc != 5) { cmd_usage(cmdtp); return 1; } /* * I2C chip address */ chip = simple_strtoul(argv[1], NULL, 16); /* * I2C data address within the chip. This can be 1 or * 2 bytes long. Some day it might be 3 bytes long :-). */ devaddr = simple_strtoul(argv[2], NULL, 16); alen = get_alen(argv[2]); if (alen == 0) { cmd_usage(cmdtp); return 1; } /* * Length is the number of objects, not number of bytes. */ length = simple_strtoul(argv[3], NULL, 16); /* * memaddr is the address where to store things in memory */ memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16); if (i2c_read(chip, devaddr, alen, memaddr, length) != 0) { puts ("Error reading the chip.\n"); return 1; } return 0; } /* * Syntax: * i2c md {i2c_chip} {addr}{.0, .1, .2} {len} */ static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { u_char chip; uint addr, alen, length; int j, nbytes, linebytes; /* We use the last specified parameters, unless new ones are * entered. */ chip = i2c_dp_last_chip; addr = i2c_dp_last_addr; alen = i2c_dp_last_alen; length = i2c_dp_last_length; if (argc < 3) { cmd_usage(cmdtp); return 1; } if ((flag & CMD_FLAG_REPEAT) == 0) { /* * New command specified. */ /* * I2C chip address */ chip = simple_strtoul(argv[1], NULL, 16); /* * I2C data address within the chip. This can be 1 or * 2 bytes long. Some day it might be 3 bytes long :-). */ addr = simple_strtoul(argv[2], NULL, 16); alen = get_alen(argv[2]); if (alen == 0) { cmd_usage(cmdtp); return 1; } /* * If another parameter, it is the length to display. * Length is the number of objects, not number of bytes. */ if (argc > 3) length = simple_strtoul(argv[3], NULL, 16); } /* * Print the lines. * * We buffer all read data, so we can make sure data is read only * once. */ nbytes = length; do { unsigned char linebuf[DISP_LINE_LEN]; unsigned char *cp; linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes; if (i2c_read(chip, addr, alen, linebuf, linebytes) != 0) puts ("Error reading the chip.\n"); else { printf("%04x:", addr); cp = linebuf; for (j=0; j<linebytes; j++) { printf(" %02x", *cp++); addr++; } puts (" "); cp = linebuf; for (j=0; j<linebytes; j++) { if ((*cp < 0x20) || (*cp > 0x7e)) puts ("."); else printf("%c", *cp); cp++; } putc ('\n'); } nbytes -= linebytes; } while (nbytes > 0); i2c_dp_last_chip = chip; i2c_dp_last_addr = addr; i2c_dp_last_alen = alen; i2c_dp_last_length = length; return 0; } /* Write (fill) memory * * Syntax: * i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}] */ static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { uchar chip; ulong addr; uint alen; uchar byte; int count; if ((argc < 4) || (argc > 5)) { cmd_usage(cmdtp); return 1; } /* * Chip is always specified. */ chip = simple_strtoul(argv[1], NULL, 16); /* * Address is always specified. */ addr = simple_strtoul(argv[2], NULL, 16); alen = get_alen(argv[2]); if (alen == 0) { cmd_usage(cmdtp); return 1; } /* * Value to write is always specified. */ byte = simple_strtoul(argv[3], NULL, 16); /* * Optional count */ if (argc == 5) count = simple_strtoul(argv[4], NULL, 16); else count = 1; while (count-- > 0) { if (i2c_write(chip, addr++, alen, &byte, 1) != 0) puts ("Error writing the chip.\n"); /* * Wait for the write to complete. The write can take * up to 10mSec (we allow a little more time). */ /* * No write delay with FRAM devices. */ #if !defined(CONFIG_SYS_I2C_FRAM) udelay(11000); #endif } return (0); } /* Calculate a CRC on memory * * Syntax: * i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count} */ static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { uchar chip; ulong addr; uint alen; int count; uchar byte; ulong crc; ulong err; if (argc < 4) { cmd_usage(cmdtp); return 1; } /* * Chip is always specified. */ chip = simple_strtoul(argv[1], NULL, 16); /* * Address is always specified. */ addr = simple_strtoul(argv[2], NULL, 16); alen = get_alen(argv[2]); if (alen == 0) { cmd_usage(cmdtp); return 1; } /* * Count is always specified */ count = simple_strtoul(argv[3], NULL, 16); printf ("CRC32 for %08lx ... %08lx ==> ", addr, addr + count - 1); /* * CRC a byte at a time. This is going to be slooow, but hey, the * memories are small and slow too so hopefully nobody notices. */ crc = 0; err = 0; while (count-- > 0) { if (i2c_read(chip, addr, alen, &byte, 1) != 0) err++; crc = crc32 (crc, &byte, 1); addr++; } if (err > 0) puts ("Error reading the chip,\n"); else printf ("%08lx\n", crc); return 0; } /* Modify memory. * * Syntax: * i2c mm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2} * i2c nm{.b, .w, .l} {i2c_chip} {addr}{.0, .1, .2} */ static int mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const argv[]) { uchar chip; ulong addr; uint alen; ulong data; int size = 1; int nbytes; extern char console_buffer[]; if (argc != 3) { cmd_usage(cmdtp); return 1; } #ifdef CONFIG_BOOT_RETRY_TIME reset_cmd_timeout(); /* got a good command to get here */ #endif /* * We use the last specified parameters, unless new ones are * entered. */ chip = i2c_mm_last_chip; addr = i2c_mm_last_addr; alen = i2c_mm_last_alen; if ((flag & CMD_FLAG_REPEAT) == 0) { /* * New command specified. Check for a size specification. * Defaults to byte if no or incorrect specification. */ size = cmd_get_data_size(argv[0], 1); /* * Chip is always specified. */ chip = simple_strtoul(argv[1], NULL, 16); /* * Address is always specified. */ addr = simple_strtoul(argv[2], NULL, 16); alen = get_alen(argv[2]); if (alen == 0) { cmd_usage(cmdtp); return 1; } } /* * Print the address, followed by value. Then accept input for * the next value. A non-converted value exits. */ do { printf("%08lx:", addr); if (i2c_read(chip, addr, alen, (uchar *)&data, size) != 0) puts ("\nError reading the chip,\n"); else { data = cpu_to_be32(data); if (size == 1) printf(" %02lx", (data >> 24) & 0x000000FF); else if (size == 2) printf(" %04lx", (data >> 16) & 0x0000FFFF); else printf(" %08lx", data); } nbytes = readline (" ? "); if (nbytes == 0) { /* * <CR> pressed as only input, don't modify current * location and move to next. */ if (incrflag) addr += size; nbytes = size; #ifdef CONFIG_BOOT_RETRY_TIME reset_cmd_timeout(); /* good enough to not time out */ #endif } #ifdef CONFIG_BOOT_RETRY_TIME else if (nbytes == -2) break; /* timed out, exit the command */ #endif else { char *endp; data = simple_strtoul(console_buffer, &endp, 16); if (size == 1) data = data << 24; else if (size == 2) data = data << 16; data = be32_to_cpu(data); nbytes = endp - console_buffer; if (nbytes) { #ifdef CONFIG_BOOT_RETRY_TIME /* * good enough to not time out */ reset_cmd_timeout(); #endif if (i2c_write(chip, addr, alen, (uchar *)&data, size) != 0) puts ("Error writing the chip.\n"); #ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000); #endif if (incrflag) addr += size; } } } while (nbytes); i2c_mm_last_chip = chip; i2c_mm_last_addr = addr; i2c_mm_last_alen = alen; return 0; } /* * Syntax: * i2c probe {addr}{.0, .1, .2} */ static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { int j; #if defined(CONFIG_SYS_I2C_NOPROBES) int k, skip; uchar bus = GET_BUS_NUM; #endif /* NOPROBES */ puts ("Valid chip addresses:"); for (j = 0; j < 128; j++) { #if defined(CONFIG_SYS_I2C_NOPROBES) skip = 0; for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) { if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) { skip = 1; break; } } if (skip) continue; #endif if (i2c_probe(j) == 0) printf(" %02X", j); } putc ('\n'); #if defined(CONFIG_SYS_I2C_NOPROBES) puts ("Excluded chip addresses:"); for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) { if (COMPARE_BUS(bus,k)) printf(" %02X", NO_PROBE_ADDR(k)); } putc ('\n'); #endif return 0; } /* * Syntax: * i2c loop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}] * {length} - Number of bytes to read * {delay} - A DECIMAL number and defaults to 1000 uSec */ static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { u_char chip; ulong alen; uint addr; uint length; u_char bytes[16]; int delay; if (argc < 3) { cmd_usage(cmdtp); return 1; } /* * Chip is always specified. */ chip = simple_strtoul(argv[1], NULL, 16); /* * Address is always specified. */ addr = simple_strtoul(argv[2], NULL, 16); alen = get_alen(argv[2]); if (alen == 0) { cmd_usage(cmdtp); return 1; } /* * Length is the number of objects, not number of bytes. */ length = 1; length = simple_strtoul(argv[3], NULL, 16); if (length > sizeof(bytes)) length = sizeof(bytes); /* * The delay time (uSec) is optional. */ delay = 1000; if (argc > 3) delay = simple_strtoul(argv[4], NULL, 10); /* * Run the loop... */ while (1) { if (i2c_read(chip, addr, alen, bytes, length) != 0) puts ("Error reading the chip.\n"); udelay(delay); } /* NOTREACHED */ return 0; } /* * The SDRAM command is separately configured because many * (most?) embedded boards don't use SDRAM DIMMs. */ #if defined(CONFIG_CMD_SDRAM) static void print_ddr2_tcyc (u_char const b) { printf ("%d.", (b >> 4) & 0x0F); switch (b & 0x0F) { case 0x0: case 0x1: case 0x2: case 0x3: case 0x4: case 0x5: case 0x6: case 0x7: case 0x8: case 0x9: printf ("%d ns\n", b & 0x0F); break; case 0xA: puts ("25 ns\n"); break; case 0xB: puts ("33 ns\n"); break; case 0xC: puts ("66 ns\n"); break; case 0xD: puts ("75 ns\n"); break; default: puts ("?? ns\n"); break; } } static void decode_bits (u_char const b, char const *str[], int const do_once) { u_char mask; for (mask = 0x80; mask != 0x00; mask >>= 1, ++str) { if (b & mask) { puts (*str); if (do_once) return; } } } /* * Syntax: * i2c sdram {i2c_chip} */ static int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) { enum { unknown, EDO, SDRAM, DDR2 } type; u_char chip; u_char data[128]; u_char cksum; int j; static const char *decode_CAS_DDR2[] = { " TBD", " 6", " 5", " 4", " 3", " 2", " TBD", " TBD" }; static const char *decode_CAS_default[] = { " TBD", " 7", " 6", " 5", " 4", " 3", " 2", " 1" }; static const char *decode_CS_WE_default[] = { " TBD", " 6", " 5", " 4", " 3", " 2", " 1", " 0" }; static const char *decode_byte21_default[] = { " TBD (bit 7)\n", " Redundant row address\n", " Differential clock input\n", " Registerd DQMB inputs\n", " Buffered DQMB inputs\n", " On-card PLL\n", " Registered address/control lines\n", " Buffered address/control lines\n" }; static const char *decode_byte22_DDR2[] = { " TBD (bit 7)\n", " TBD (bit 6)\n", " TBD (bit 5)\n", " TBD (bit 4)\n", " TBD (bit 3)\n", " Supports partial array self refresh\n", " Supports 50 ohm ODT\n", " Supports weak driver\n" }; static const char *decode_row_density_DDR2[] = { "512 MiB", "256 MiB", "128 MiB", "16 GiB", "8 GiB", "4 GiB", "2 GiB", "1 GiB" }; static const char *decode_row_density_default[] = { "512 MiB", "256 MiB", "128 MiB", "64 MiB", "32 MiB", "16 MiB", "8 MiB", "4 MiB" }; if (argc < 2) { cmd_usage(cmdtp); return 1; } /* * Chip is always specified. */ chip = simple_strtoul (argv[1], NULL, 16); if (i2c_read (chip, 0, 1, data, sizeof (data)) != 0) { puts ("No SDRAM Serial Presence Detect found.\n"); return 1; } cksum = 0; for (j = 0; j < 63; j++) { cksum += data[j]; } if (cksum != data[63]) { printf ("WARNING: Configuration data checksum failure:\n" " is 0x%02x, calculated 0x%02x\n", data[63], cksum); } printf ("SPD data revision %d.%d\n", (data[62] >> 4) & 0x0F, data[62] & 0x0F); printf ("Bytes used 0x%02X\n", data[0]); printf ("Serial memory size 0x%02X\n", 1 << data[1]); puts ("Memory type "); switch (data[2]) { case 2: type = EDO; puts ("EDO\n"); break; case 4: type = SDRAM; puts ("SDRAM\n"); break; case 8: type = DDR2; puts ("DDR2\n"); break; default: type = unknown; puts ("unknown\n"); break; } puts ("Row address bits "); if ((data[3] & 0x00F0) == 0) printf ("%d\n", data[3] & 0x0F); else printf ("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F); puts ("Column address bits "); if ((data[4] & 0x00F0) == 0) printf ("%d\n", data[4] & 0x0F); else printf ("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F); switch (type) { case DDR2: printf ("Number of ranks %d\n", (data[5] & 0x07) + 1); break; default: printf ("Module rows %d\n", data[5]); break; } switch (type) { case DDR2: printf ("Module data width %d bits\n", data[6]); break; default: printf ("Module data width %d bits\n", (data[7] << 8) | data[6]); break; } puts ("Interface signal levels "); switch(data[8]) { case 0: puts ("TTL 5.0 V\n"); break; case 1: puts ("LVTTL\n"); break; case 2: puts ("HSTL 1.5 V\n"); break; case 3: puts ("SSTL 3.3 V\n"); break; case 4: puts ("SSTL 2.5 V\n"); break; case 5: puts ("SSTL 1.8 V\n"); break; default: puts ("unknown\n"); break; } switch (type) { case DDR2: printf ("SDRAM cycle time "); print_ddr2_tcyc (data[9]); break; default: printf ("SDRAM cycle time %d.%d ns\n", (data[9] >> 4) & 0x0F, data[9] & 0x0F); break; } switch (type) { case DDR2: printf ("SDRAM access time 0.%d%d ns\n", (data[10] >> 4) & 0x0F, data[10] & 0x0F); break; default: printf ("SDRAM access time %d.%d ns\n", (data[10] >> 4) & 0x0F, data[10] & 0x0F); break; } puts ("EDC configuration "); switch (data[11]) { case 0: puts ("None\n"); break; case 1: puts ("Parity\n"); break; case 2: puts ("ECC\n"); break; default: puts ("unknown\n"); break; } if ((data[12] & 0x80) == 0) puts ("No self refresh, rate "); else puts ("Self refresh, rate "); switch(data[12] & 0x7F) { case 0: puts ("15.625 us\n"); break; case 1: puts ("3.9 us\n"); break; case 2: puts ("7.8 us\n"); break; case 3: puts ("31.3 us\n"); break; case 4: puts ("62.5 us\n"); break; case 5: puts ("125 us\n"); break; default: puts ("unknown\n"); break; } switch (type) { case DDR2: printf ("SDRAM width (primary) %d\n", data[13]); break; default: printf ("SDRAM width (primary) %d\n", data[13] & 0x7F); if ((data[13] & 0x80) != 0) { printf (" (second bank) %d\n", 2 * (data[13] & 0x7F)); } break; } switch (type) { case DDR2: if (data[14] != 0) printf ("EDC width %d\n", data[14]); break; default: if (data[14] != 0) { printf ("EDC width %d\n", data[14] & 0x7F); if ((data[14] & 0x80) != 0) { printf (" (second bank) %d\n", 2 * (data[14] & 0x7F)); } } break; } if (DDR2 != type) { printf ("Min clock delay, back-to-back random column addresses " "%d\n", data[15]); } puts ("Burst length(s) "); if (data[16] & 0x80) puts (" Page"); if (data[16] & 0x08) puts (" 8"); if (data[16] & 0x04) puts (" 4"); if (data[16] & 0x02) puts (" 2"); if (data[16] & 0x01) puts (" 1"); putc ('\n'); printf ("Number of banks %d\n", data[17]); switch (type) { case DDR2: puts ("CAS latency(s) "); decode_bits (data[18], decode_CAS_DDR2, 0); putc ('\n'); break; default: puts ("CAS latency(s) "); decode_bits (data[18], decode_CAS_default, 0); putc ('\n'); break; } if (DDR2 != type) { puts ("CS latency(s) "); decode_bits (data[19], decode_CS_WE_default, 0); putc ('\n'); } if (DDR2 != type) { puts ("WE latency(s) "); decode_bits (data[20], decode_CS_WE_default, 0); putc ('\n'); } switch (type) { case DDR2: puts ("Module attributes:\n"); if (data[21] & 0x80) puts (" TBD (bit 7)\n"); if (data[21] & 0x40) puts (" Analysis probe installed\n"); if (data[21] & 0x20) puts (" TBD (bit 5)\n"); if (data[21] & 0x10) puts (" FET switch external enable\n"); printf (" %d PLLs on DIMM\n", (data[21] >> 2) & 0x03); if (data[20] & 0x11) { printf (" %d active registers on DIMM\n", (data[21] & 0x03) + 1); } break; default: puts ("Module attributes:\n"); if (!data[21]) puts (" (none)\n"); else decode_bits (data[21], decode_byte21_default, 0); break; } switch (type) { case DDR2: decode_bits (data[22], decode_byte22_DDR2, 0); break; default: puts ("Device attributes:\n"); if (data[22] & 0x80) puts (" TBD (bit 7)\n"); if (data[22] & 0x40) puts (" TBD (bit 6)\n"); if (data[22] & 0x20) puts (" Upper Vcc tolerance 5%\n"); else puts (" Upper Vcc tolerance 10%\n"); if (data[22] & 0x10) puts (" Lower Vcc tolerance 5%\n"); else puts (" Lower Vcc tolerance 10%\n"); if (data[22] & 0x08) puts (" Supports write1/read burst\n"); if (data[22] & 0x04) puts (" Supports precharge all\n"); if (data[22] & 0x02) puts (" Supports auto precharge\n"); if (data[22] & 0x01) puts (" Supports early RAS# precharge\n"); break; } switch (type) { case DDR2: printf ("SDRAM cycle time (2nd highest CAS latency) "); print_ddr2_tcyc (data[23]); break; default: printf ("SDRAM cycle time (2nd highest CAS latency) %d." "%d ns\n", (data[23] >> 4) & 0x0F, data[23] & 0x0F); break; } switch (type) { case DDR2: printf ("SDRAM access from clock (2nd highest CAS latency) 0." "%d%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F); break; default: printf ("SDRAM access from clock (2nd highest CAS latency) %d." "%d ns\n", (data[24] >> 4) & 0x0F, data[24] & 0x0F); break; } switch (type) { case DDR2: printf ("SDRAM cycle time (3rd highest CAS latency) "); print_ddr2_tcyc (data[25]); break; default: printf ("SDRAM cycle time (3rd highest CAS latency) %d." "%d ns\n", (data[25] >> 4) & 0x0F, data[25] & 0x0F); break; } switch (type) { case DDR2: printf ("SDRAM access from clock (3rd highest CAS latency) 0." "%d%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F); break; default: printf ("SDRAM access from clock (3rd highest CAS latency) %d." "%d ns\n", (data[26] >> 4) & 0x0F, data[26] & 0x0F); break; } switch (type) { case DDR2: printf ("Minimum row precharge %d.%02d ns\n", (data[27] >> 2) & 0x3F, 25 * (data[27] & 0x03)); break; default: printf ("Minimum row precharge %d ns\n", data[27]); break; } switch (type) { case DDR2: printf ("Row active to row active min %d.%02d ns\n", (data[28] >> 2) & 0x3F, 25 * (data[28] & 0x03)); break; default: printf ("Row active to row active min %d ns\n", data[28]); break; } switch (type) { case DDR2: printf ("RAS to CAS delay min %d.%02d ns\n", (data[29] >> 2) & 0x3F, 25 * (data[29] & 0x03)); break; default: printf ("RAS to CAS delay min %d ns\n", data[29]); break; } printf ("Minimum RAS pulse width %d ns\n", data[30]); switch (type) { case DDR2: puts ("Density of each row "); decode_bits (data[31], decode_row_density_DDR2, 1); putc ('\n'); break; default: puts ("Density of each row "); decode_bits (data[31], decode_row_density_default, 1); putc ('\n'); break; } switch (type) { case DDR2: puts ("Command and Address setup "); if (data[32] >= 0xA0) { printf ("1.%d%d ns\n", ((data[32] >> 4) & 0x0F) - 10, data[32] & 0x0F); } else { printf ("0.%d%d ns\n", ((data[32] >> 4) & 0x0F), data[32] & 0x0F); } break; default: printf ("Command and Address setup %c%d.%d ns\n", (data[32] & 0x80) ? '-' : '+', (data[32] >> 4) & 0x07, data[32] & 0x0F); break; } switch (type) { case DDR2: puts ("Command and Address hold "); if (data[33] >= 0xA0) { printf ("1.%d%d ns\n", ((data[33] >> 4) & 0x0F) - 10, data[33] & 0x0F); } else { printf ("0.%d%d ns\n", ((data[33] >> 4) & 0x0F), data[33] & 0x0F); } break; default: printf ("Command and Address hold %c%d.%d ns\n", (data[33] & 0x80) ? '-' : '+', (data[33] >> 4) & 0x07, data[33] & 0x0F); break; } switch (type) { case DDR2: printf ("Data signal input setup 0.%d%d ns\n", (data[34] >> 4) & 0x0F, data[34] & 0x0F); break; default: printf ("Data signal input setup %c%d.%d ns\n", (data[34] & 0x80) ? '-' : '+', (data[34] >> 4) & 0x07, data[34] & 0x0F); break; } switch (type) { case DDR2: printf ("Data signal input hold 0.%d%d ns\n", (data[35] >> 4) & 0x0F, data[35] & 0x0F); break; default: printf ("Data signal input hold %c%d.%d ns\n", (data[35] & 0x80) ? '-' : '+', (data[35] >> 4) & 0x07, data[35] & 0x0F); break; } puts ("Manufacturer's JEDEC ID "); for (j = 64; j <= 71; j++) printf ("%02X ", data[j]); putc ('\n'); printf ("Manufacturing Location %02X\n", data[72]); puts ("Manufacturer's Part Number "); for (j = 73; j <= 90; j++) printf ("%02X ", data[j]); putc ('\n'); printf ("Revision Code %02X %02X\n", data[91], data[92]); printf ("Manufacturing Date %02X %02X\n", data[93], data[94]); puts ("Assembly Serial Number "); for (j = 95; j <= 98; j++) printf ("%02X ", data[j]); putc ('\n'); if (DDR2 != type) { printf ("Speed rating PC%d\n", data[126] == 0x66 ? 66 : data[126]); } return 0; } #endif #if defined(CONFIG_I2C_MUX) static int do_i2c_add_bus(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) { int ret=0; if (argc == 1) { /* show all busses */ I2C_MUX *mux; I2C_MUX_DEVICE *device = i2c_mux_devices; printf ("Busses reached over muxes:\n"); while (device != NULL) { printf ("Bus ID: %x\n", device->busid); printf (" reached over Mux(es):\n"); mux = device->mux; while (mux != NULL) { printf (" %s@%x ch: %x\n", mux->name, mux->chip, mux->channel); mux = mux->next; } device = device->next; } } else { I2C_MUX_DEVICE *dev; dev = i2c_mux_ident_muxstring ((uchar *)argv[1]); ret = 0; } return ret; } #endif /* CONFIG_I2C_MUX */ #if defined(CONFIG_I2C_MULTI_BUS) static int do_i2c_bus_num(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) { int bus_idx, ret=0; if (argc == 1) /* querying current setting */ printf("Current bus is %d\n", i2c_get_bus_num()); else { bus_idx = simple_strtoul(argv[1], NULL, 10); printf("Setting bus to %d\n", bus_idx); ret = i2c_set_bus_num(bus_idx); if (ret) printf("Failure changing bus number (%d)\n", ret); } return ret; } #endif /* CONFIG_I2C_MULTI_BUS */ static int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) { int speed, ret=0; if (argc == 1) /* querying current speed */ printf("Current bus speed=%d\n", i2c_get_bus_speed()); else { speed = simple_strtoul(argv[1], NULL, 10); printf("Setting bus speed to %d Hz\n", speed); ret = i2c_set_bus_speed(speed); if (ret) printf("Failure changing bus speed (%d)\n", ret); } return ret; } static int do_i2c_mm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) { return mod_i2c_mem (cmdtp, 1, flag, argc, argv); } static int do_i2c_nm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) { return mod_i2c_mem (cmdtp, 0, flag, argc, argv); } static int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) { i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); return 0; } static cmd_tbl_t cmd_i2c_sub[] = { #if defined(CONFIG_I2C_MUX) U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_add_bus, "", ""), #endif /* CONFIG_I2C_MUX */ U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""), #if defined(CONFIG_I2C_MULTI_BUS) U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""), #endif /* CONFIG_I2C_MULTI_BUS */ U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""), U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""), U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""), U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""), U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""), U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""), U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""), U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""), #if defined(CONFIG_CMD_SDRAM) U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""), #endif U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""), }; static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) { cmd_tbl_t *c; /* Strip off leading 'i2c' command argument */ argc--; argv++; c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub)); if (c) { return c->cmd(cmdtp, flag, argc, argv); } else { cmd_usage(cmdtp); return 1; } } /***************************************************/ U_BOOT_CMD( i2c, 6, 1, do_i2c, "I2C sub-system", #if defined(CONFIG_I2C_MUX) "bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\ni2c " #endif /* CONFIG_I2C_MUX */ "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n" #if defined(CONFIG_I2C_MULTI_BUS) "i2c dev [dev] - show or set current I2C bus\n" #endif /* CONFIG_I2C_MULTI_BUS */ "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n" "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n" "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n" "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n" "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n" "i2c probe - show devices on the I2C bus\n" "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n" "i2c reset - re-init the I2C Controller\n" #if defined(CONFIG_CMD_SDRAM) "i2c sdram chip - print SDRAM configuration information\n" #endif "i2c speed [speed] - show or set I2C bus speed" ); #if defined(CONFIG_I2C_MUX) static int i2c_mux_add_device(I2C_MUX_DEVICE *dev) { I2C_MUX_DEVICE *devtmp = i2c_mux_devices; if (i2c_mux_devices == NULL) { i2c_mux_devices = dev; return 0; } while (devtmp->next != NULL) devtmp = devtmp->next; devtmp->next = dev; return 0; } I2C_MUX_DEVICE *i2c_mux_search_device(int id) { I2C_MUX_DEVICE *device = i2c_mux_devices; while (device != NULL) { if (device->busid == id) return device; device = device->next; } return NULL; } /* searches in the buf from *pos the next ':'. * returns: * 0 if found (with *pos = where) * < 0 if an error occured * > 0 if the end of buf is reached */ static int i2c_mux_search_next (int *pos, uchar *buf, int len) { while ((buf[*pos] != ':') && (*pos < len)) { *pos += 1; } if (*pos >= len) return 1; if (buf[*pos] != ':') return -1; return 0; } static int i2c_mux_get_busid (void) { int tmp = i2c_mux_busid; i2c_mux_busid ++; return tmp; } /* Analyses a Muxstring and sends immediately the Commands to the Muxes. Runs from Flash. */ int i2c_mux_ident_muxstring_f (uchar *buf) { int pos = 0; int oldpos; int ret = 0; int len = strlen((char *)buf); int chip; uchar channel; int was = 0; while (ret == 0) { oldpos = pos; /* search name */ ret = i2c_mux_search_next(&pos, buf, len); if (ret != 0) printf ("ERROR\n"); /* search address */ pos ++; oldpos = pos; ret = i2c_mux_search_next(&pos, buf, len); if (ret != 0) printf ("ERROR\n"); buf[pos] = 0; chip = simple_strtoul((char *)&buf[oldpos], NULL, 16); buf[pos] = ':'; /* search channel */ pos ++; oldpos = pos; ret = i2c_mux_search_next(&pos, buf, len); if (ret < 0) printf ("ERROR\n"); was = 0; if (buf[pos] != 0) { buf[pos] = 0; was = 1; } channel = simple_strtoul((char *)&buf[oldpos], NULL, 16); if (was) buf[pos] = ':'; if (i2c_write(chip, 0, 0, &channel, 1) != 0) { printf ("Error setting Mux: chip:%x channel: \ %x\n", chip, channel); return -1; } pos ++; oldpos = pos; } return 0; } /* Analyses a Muxstring and if this String is correct * adds a new I2C Bus. */ I2C_MUX_DEVICE *i2c_mux_ident_muxstring (uchar *buf) { I2C_MUX_DEVICE *device; I2C_MUX *mux; int pos = 0; int oldpos; int ret = 0; int len = strlen((char *)buf); int was = 0; device = (I2C_MUX_DEVICE *)malloc (sizeof(I2C_MUX_DEVICE)); device->mux = NULL; device->busid = i2c_mux_get_busid (); device->next = NULL; while (ret == 0) { mux = (I2C_MUX *)malloc (sizeof(I2C_MUX)); mux->next = NULL; /* search name of mux */ oldpos = pos; ret = i2c_mux_search_next(&pos, buf, len); if (ret != 0) printf ("%s no name.\n", __FUNCTION__); mux->name = (char *)malloc (pos - oldpos + 1); memcpy (mux->name, &buf[oldpos], pos - oldpos); mux->name[pos - oldpos] = 0; /* search address */ pos ++; oldpos = pos; ret = i2c_mux_search_next(&pos, buf, len); if (ret != 0) printf ("%s no mux address.\n", __FUNCTION__); buf[pos] = 0; mux->chip = simple_strtoul((char *)&buf[oldpos], NULL, 16); buf[pos] = ':'; /* search channel */ pos ++; oldpos = pos; ret = i2c_mux_search_next(&pos, buf, len); if (ret < 0) printf ("%s no mux channel.\n", __FUNCTION__); was = 0; if (buf[pos] != 0) { buf[pos] = 0; was = 1; } mux->channel = simple_strtoul((char *)&buf[oldpos], NULL, 16); if (was) buf[pos] = ':'; if (device->mux == NULL) device->mux = mux; else { I2C_MUX *muxtmp = device->mux; while (muxtmp->next != NULL) { muxtmp = muxtmp->next; } muxtmp->next = mux; } pos ++; oldpos = pos; } if (ret > 0) { /* Add Device */ i2c_mux_add_device (device); return device; } return NULL; } int i2x_mux_select_mux(int bus) { I2C_MUX_DEVICE *dev; I2C_MUX *mux; if ((gd->flags & GD_FLG_RELOC) != GD_FLG_RELOC) { /* select Default Mux Bus */ #if defined(CONFIG_SYS_I2C_IVM_BUS) i2c_mux_ident_muxstring_f ((uchar *)CONFIG_SYS_I2C_IVM_BUS); #else { unsigned char *buf; buf = (unsigned char *) getenv("EEprom_ivm"); if (buf != NULL) i2c_mux_ident_muxstring_f (buf); } #endif return 0; } dev = i2c_mux_search_device(bus); if (dev == NULL) return -1; mux = dev->mux; while (mux != NULL) { if (i2c_write(mux->chip, 0, 0, &mux->channel, 1) != 0) { printf ("Error setting Mux: chip:%x channel: \ %x\n", mux->chip, mux->channel); return -1; } mux = mux->next; } return 0; } #endif /* CONFIG_I2C_MUX */