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Diffstat (limited to 'u-boot/common/cmd_i2c.c')
| -rw-r--r-- | u-boot/common/cmd_i2c.c | 1553 |
1 files changed, 1553 insertions, 0 deletions
diff --git a/u-boot/common/cmd_i2c.c b/u-boot/common/cmd_i2c.c new file mode 100644 index 0000000..c272b0d --- /dev/null +++ b/u-boot/common/cmd_i2c.c @@ -0,0 +1,1553 @@ +/* + * (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 + */ +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'; + 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) + return cmd_usage(cmdtp); + + /* + * 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 > 3) + return cmd_usage(cmdtp); + + /* + * 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) + return cmd_usage(cmdtp); + + 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 > 3) + return cmd_usage(cmdtp); + + /* + * 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)) + return cmd_usage(cmdtp); + + /* + * 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 > 3) + return cmd_usage(cmdtp); + + /* + * 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) + return cmd_usage(cmdtp); + + /* + * 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 > 3) + return cmd_usage(cmdtp); + + /* + * 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) + return cmd_usage(cmdtp); + +#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 > 3) + return cmd_usage(cmdtp); + } + + /* + * 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) + return cmd_usage(cmdtp); + + /* + * 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 > 3) + return cmd_usage(cmdtp); + + /* + * 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) + return cmd_usage(cmdtp); + + /* + * 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, "", ""), +}; + +#ifdef CONFIG_NEEDS_MANUAL_RELOC +void i2c_reloc(void) { + fixup_cmdtable(cmd_i2c_sub, ARRAY_SIZE(cmd_i2c_sub)); +} +#endif + +static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) +{ + cmd_tbl_t *c; + + if (argc < 2) + return cmd_usage(cmdtp); + + /* 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 + return cmd_usage(cmdtp); +} + +/***************************************************/ + +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 */ |