--- /dev/null
+/*
+ * (C) Copyright 2009
+ * Sergey Kubushyn, himself, ksi@koi8.net
+ *
+ * Changes for unified multibus/multiadapter I2C support.
+ *
+ * (C) Copyright 2001
+ * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ * 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 <edid.h>
+#include <environment.h>
+#include <i2c.h>
+#include <malloc.h>
+#include <asm/byteorder.h>
+#include <linux/compiler.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* 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_SYS_I2C) || 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 /* defined(CONFIG_SYS_I2C) */
+#endif
+
+#define DISP_LINE_LEN 16
+
+/**
+ * i2c_init_board() - Board-specific I2C bus init
+ *
+ * This function is the default no-op implementation of I2C bus
+ * initialization. This function can be overriden by board-specific
+ * implementation if needed.
+ */
+__weak
+void i2c_init_board(void)
+{
+}
+
+/* TODO: Implement architecture-specific get/set functions */
+
+/**
+ * i2c_get_bus_speed() - Return I2C bus speed
+ *
+ * This function is the default implementation of function for retrieveing
+ * the current I2C bus speed in Hz.
+ *
+ * A driver implementing runtime switching of I2C bus speed must override
+ * this function to report the speed correctly. Simple or legacy drivers
+ * can use this fallback.
+ *
+ * Returns I2C bus speed in Hz.
+ */
+#if !defined(CONFIG_SYS_I2C)
+/*
+ * TODO: Implement architecture-specific get/set functions
+ * Should go away, if we switched completely to new multibus support
+ */
+__weak
+unsigned int i2c_get_bus_speed(void)
+{
+ return CONFIG_SYS_I2C_SPEED;
+}
+
+/**
+ * i2c_set_bus_speed() - Configure I2C bus speed
+ * @speed: Newly set speed of the I2C bus in Hz
+ *
+ * This function is the default implementation of function for setting
+ * the I2C bus speed in Hz.
+ *
+ * A driver implementing runtime switching of I2C bus speed must override
+ * this function to report the speed correctly. Simple or legacy drivers
+ * can use this fallback.
+ *
+ * Returns zero on success, negative value on error.
+ */
+__weak
+int i2c_set_bus_speed(unsigned int speed)
+{
+ if (speed != CONFIG_SYS_I2C_SPEED)
+ return -1;
+
+ return 0;
+}
+#endif
+
+/**
+ * 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;
+}
+
+/**
+ * do_i2c_read() - Handle the "i2c read" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ *
+ * 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_RET_USAGE;
+
+ /*
+ * 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_RET_USAGE;
+
+ /*
+ * 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;
+}
+
+static int do_i2c_write(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);
+
+ /*
+ * memaddr is the address where to store things in memory
+ */
+ memaddr = (u_char *)simple_strtoul(argv[1], NULL, 16);
+
+ /*
+ * I2C chip address
+ */
+ chip = simple_strtoul(argv[2], 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[3], NULL, 16);
+ alen = get_alen(argv[3]);
+ if (alen > 3)
+ return cmd_usage(cmdtp);
+
+ /*
+ * Length is the number of objects, not number of bytes.
+ */
+ length = simple_strtoul(argv[4], NULL, 16);
+
+ while (length-- > 0) {
+ if (i2c_write(chip, devaddr++, alen, memaddr++, 1) != 0) {
+ puts("Error writing to the chip.\n");
+ return 1;
+ }
+/*
+ * No write delay with FRAM devices.
+ */
+#if !defined(CONFIG_SYS_I2C_FRAM)
+ udelay(11000);
+#endif
+ }
+ return 0;
+}
+
+/**
+ * do_i2c_md() - Handle the "i2c md" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ *
+ * 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_RET_USAGE;
+
+ 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_RET_USAGE;
+
+ /*
+ * 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;
+}
+
+/**
+ * do_i2c_mw() - Handle the "i2c mw" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ *
+ * 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_RET_USAGE;
+
+ /*
+ * 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_RET_USAGE;
+
+ /*
+ * 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;
+}
+
+/**
+ * do_i2c_crc() - Handle the "i2c crc32" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Calculate a CRC on memory
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ *
+ * 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_RET_USAGE;
+
+ /*
+ * 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_RET_USAGE;
+
+ /*
+ * 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;
+}
+
+/**
+ * mod_i2c_mem() - Handle the "i2c mm" and "i2c nm" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Modify memory.
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ *
+ * 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;
+
+ if (argc != 3)
+ return CMD_RET_USAGE;
+
+#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_RET_USAGE;
+ }
+
+ /*
+ * 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;
+}
+
+/**
+ * do_i2c_probe() - Handle the "i2c probe" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ *
+ * Syntax:
+ * i2c probe {addr}
+ *
+ * Returns zero (success) if one or more I2C devices was found
+ */
+static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ int j;
+ int addr = -1;
+ int found = 0;
+#if defined(CONFIG_SYS_I2C_NOPROBES)
+ int k, skip;
+ unsigned int bus = GET_BUS_NUM;
+#endif /* NOPROBES */
+
+ if (argc == 2)
+ addr = simple_strtol(argv[1], 0, 16);
+
+ puts ("Valid chip addresses:");
+ for (j = 0; j < 128; j++) {
+ if ((0 <= addr) && (j != addr))
+ continue;
+
+#if defined(CONFIG_SYS_I2C_NOPROBES)
+ skip = 0;
+ for (k = 0; k < ARRAY_SIZE(i2c_no_probes); 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);
+ found++;
+ }
+ }
+ putc ('\n');
+
+#if defined(CONFIG_SYS_I2C_NOPROBES)
+ puts ("Excluded chip addresses:");
+ for (k = 0; k < ARRAY_SIZE(i2c_no_probes); k++) {
+ if (COMPARE_BUS(bus,k))
+ printf(" %02X", NO_PROBE_ADDR(k));
+ }
+ putc ('\n');
+#endif
+
+ return (0 == found);
+}
+
+/**
+ * do_i2c_loop() - Handle the "i2c loop" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ *
+ * 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_RET_USAGE;
+
+ /*
+ * 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_RET_USAGE;
+
+ /*
+ * 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.
+ *
+ * FIXME: Document and probably move elsewhere!
+ */
+#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_RET_USAGE;
+
+ /*
+ * 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
+
+/*
+ * Syntax:
+ * i2c edid {i2c_chip}
+ */
+#if defined(CONFIG_I2C_EDID)
+int do_edid(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+ u_char chip;
+ struct edid1_info edid;
+
+ if (argc < 2) {
+ cmd_usage(cmdtp);
+ return 1;
+ }
+
+ chip = simple_strtoul(argv[1], NULL, 16);
+ if (i2c_read(chip, 0, 1, (uchar *)&edid, sizeof(edid)) != 0) {
+ puts("Error reading EDID content.\n");
+ return 1;
+ }
+
+ if (edid_check_info(&edid)) {
+ puts("Content isn't valid EDID.\n");
+ return 1;
+ }
+
+ edid_print_info(&edid);
+ return 0;
+
+}
+#endif /* CONFIG_I2C_EDID */
+
+/**
+ * do_i2c_show_bus() - Handle the "i2c bus" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero always.
+ */
+#if defined(CONFIG_SYS_I2C)
+int do_i2c_show_bus(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ int i;
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+ int j;
+#endif
+
+ if (argc == 1) {
+ /* show all busses */
+ for (i = 0; i < CONFIG_SYS_NUM_I2C_BUSES; i++) {
+ printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+ for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
+ if (i2c_bus[i].next_hop[j].chip == 0)
+ break;
+ printf("->%s@0x%2x:%d",
+ i2c_bus[i].next_hop[j].mux.name,
+ i2c_bus[i].next_hop[j].chip,
+ i2c_bus[i].next_hop[j].channel);
+ }
+#endif
+ printf("\n");
+ }
+ } else {
+ /* show specific bus */
+ i = simple_strtoul(argv[1], NULL, 10);
+ if (i >= CONFIG_SYS_NUM_I2C_BUSES) {
+ printf("Invalid bus %d\n", i);
+ return -1;
+ }
+ printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+ for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
+ if (i2c_bus[i].next_hop[j].chip == 0)
+ break;
+ printf("->%s@0x%2x:%d",
+ i2c_bus[i].next_hop[j].mux.name,
+ i2c_bus[i].next_hop[j].chip,
+ i2c_bus[i].next_hop[j].channel);
+ }
+#endif
+ printf("\n");
+ }
+
+ return 0;
+}
+#endif
+
+/**
+ * do_i2c_bus_num() - Handle the "i2c dev" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ */
+#if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS)
+int do_i2c_bus_num(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ int ret = 0;
+ unsigned int bus_no;
+
+ if (argc == 1)
+ /* querying current setting */
+ printf("Current bus is %d\n", i2c_get_bus_num());
+ else {
+ bus_no = simple_strtoul(argv[1], NULL, 10);
+#if defined(CONFIG_SYS_I2C)
+ if (bus_no >= CONFIG_SYS_NUM_I2C_BUSES) {
+ printf("Invalid bus %d\n", bus_no);
+ return -1;
+ }
+#endif
+ printf("Setting bus to %d\n", bus_no);
+ ret = i2c_set_bus_num(bus_no);
+ if (ret)
+ printf("Failure changing bus number (%d)\n", ret);
+ }
+ return ret;
+}
+#endif /* defined(CONFIG_SYS_I2C) */
+
+/**
+ * do_i2c_bus_speed() - Handle the "i2c speed" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ */
+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;
+}
+
+/**
+ * do_i2c_mm() - Handle the "i2c mm" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ */
+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);
+}
+
+/**
+ * do_i2c_nm() - Handle the "i2c nm" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ */
+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);
+}
+
+/**
+ * do_i2c_reset() - Handle the "i2c reset" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero always.
+ */
+static int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
+{
+#if defined(CONFIG_SYS_I2C)
+ i2c_init(I2C_ADAP->speed, I2C_ADAP->slaveaddr);
+#else
+ i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+#endif
+ return 0;
+}
+
+static cmd_tbl_t cmd_i2c_sub[] = {
+#if defined(CONFIG_SYS_I2C)
+ U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_show_bus, "", ""),
+#endif
+ U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
+#if defined(CONFIG_SYS_I2C) || \
+ defined(CONFIG_I2C_MULTI_BUS)
+ U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
+#endif /* CONFIG_I2C_MULTI_BUS */
+#if defined(CONFIG_I2C_EDID)
+ U_BOOT_CMD_MKENT(edid, 1, 1, do_edid, "", ""),
+#endif /* CONFIG_I2C_EDID */
+ 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(write, 5, 0, do_i2c_write, "", ""),
+ 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
+
+/**
+ * do_i2c() - Handle the "i2c" command-line command
+ * @cmdtp: Command data struct pointer
+ * @flag: Command flag
+ * @argc: Command-line argument count
+ * @argv: Array of command-line arguments
+ *
+ * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
+ * on error.
+ */
+static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
+{
+ cmd_tbl_t *c;
+
+ if (argc < 2)
+ return CMD_RET_USAGE;
+
+ /* 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_RET_USAGE;
+}
+
+/***************************************************/
+#ifdef CONFIG_SYS_LONGHELP
+static char i2c_help_text[] =
+#if defined(CONFIG_SYS_I2C)
+ "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
+#endif
+ "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
+#if defined(CONFIG_SYS_I2C) || \
+ defined(CONFIG_I2C_MULTI_BUS)
+ "i2c dev [dev] - show or set current I2C bus\n"
+#endif /* CONFIG_I2C_MULTI_BUS */
+#if defined(CONFIG_I2C_EDID)
+ "i2c edid chip - print EDID configuration information\n"
+#endif /* CONFIG_I2C_EDID */
+ "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 [address] - test for and show device(s) on the I2C bus\n"
+ "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n"
+ "i2c write memaddress chip address[.0, .1, .2] length - write memory to i2c\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";
+#endif
+
+U_BOOT_CMD(
+ i2c, 6, 1, do_i2c,
+ "I2C sub-system",
+ i2c_help_text
+);
Code Review / kvmfornfv.git / blobdiff