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u-boot/cmd/i2c.c
Lukasz Majewski e46f8a3309 i2c: Set default I2C bus number 
This patch allows using i2c commands (e.g. "i2c probe", "i2c md", etc)
without the need to first select the bus number with e.g. "i2c dev 0".

This is the "i2c" command behavior similar to the one from pre DM, where
by default bus 0 was immediately accessible.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
2017-03-28 06:27:54 +02:00

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/*
* (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 <bootretry.h>
#include <cli.h>
#include <command.h>
#include <console.h>
#include <dm.h>
#include <edid.h>
#include <environment.h>
#include <errno.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 uint i2c_dp_last_chip;
static uint i2c_dp_last_addr;
static uint i2c_dp_last_alen;
static uint i2c_dp_last_length = 0x10;
static uint 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
/*
* Default for driver model is to use the chip's existing address length.
* For legacy code, this is not stored, so we need to use a suitable
* default.
*/
#ifdef CONFIG_DM_I2C
#define DEFAULT_ADDR_LEN (-1)
#else
#define DEFAULT_ADDR_LEN 1
#endif
#ifdef CONFIG_DM_I2C
static struct udevice *i2c_cur_bus;
static int cmd_i2c_set_bus_num(unsigned int busnum)
{
struct udevice *bus;
int ret;
ret = uclass_get_device_by_seq(UCLASS_I2C, busnum, &bus);
if (ret) {
debug("%s: No bus %d\n", __func__, busnum);
return ret;
}
i2c_cur_bus = bus;
return 0;
}
static int i2c_get_cur_bus(struct udevice **busp)
{
#ifdef CONFIG_I2C_SET_DEFAULT_BUS_NUM
if (!i2c_cur_bus) {
if (cmd_i2c_set_bus_num(CONFIG_I2C_DEFAULT_BUS_NUMBER)) {
printf("Default I2C bus %d not found\n",
CONFIG_I2C_DEFAULT_BUS_NUMBER);
return -ENODEV;
}
}
#endif
if (!i2c_cur_bus) {
puts("No I2C bus selected\n");
return -ENODEV;
}
*busp = i2c_cur_bus;
return 0;
}
static int i2c_get_cur_bus_chip(uint chip_addr, struct udevice **devp)
{
struct udevice *bus;
int ret;
ret = i2c_get_cur_bus(&bus);
if (ret)
return ret;
return i2c_get_chip(bus, chip_addr, 1, devp);
}
#endif
/**
* i2c_init_board() - Board-specific I2C bus init
*
* This function is the default no-op implementation of I2C bus
* initialization. This function can be overridden 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) && !defined(CONFIG_DM_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 default_len)
{
int j;
int alen;
alen = default_len;
for (j = 0; j < 8; j++) {
if (arg[j] == '.') {
alen = arg[j+1] - '0';
break;
} else if (arg[j] == '\0')
break;
}
return alen;
}
enum i2c_err_op {
I2C_ERR_READ,
I2C_ERR_WRITE,
};
static int i2c_report_err(int ret, enum i2c_err_op op)
{
printf("Error %s the chip: %d\n",
op == I2C_ERR_READ ? "reading" : "writing", ret);
return CMD_RET_FAILURE;
}
/**
* 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[])
{
uint chip;
uint devaddr, length;
int alen;
u_char *memaddr;
int ret;
#ifdef CONFIG_DM_I2C
struct udevice *dev;
#endif
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], DEFAULT_ADDR_LEN);
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);
#ifdef CONFIG_DM_I2C
ret = i2c_get_cur_bus_chip(chip, &dev);
if (!ret && alen != -1)
ret = i2c_set_chip_offset_len(dev, alen);
if (!ret)
ret = dm_i2c_read(dev, devaddr, memaddr, length);
#else
ret = i2c_read(chip, devaddr, alen, memaddr, length);
#endif
if (ret)
return i2c_report_err(ret, I2C_ERR_READ);
return 0;
}
static int do_i2c_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
uint chip;
uint devaddr, length;
int alen;
u_char *memaddr;
int ret;
#ifdef CONFIG_DM_I2C
struct udevice *dev;
struct dm_i2c_chip *i2c_chip;
#endif
if ((argc < 5) || (argc > 6))
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], DEFAULT_ADDR_LEN);
if (alen > 3)
return cmd_usage(cmdtp);
/*
* Length is the number of bytes.
*/
length = simple_strtoul(argv[4], NULL, 16);
#ifdef CONFIG_DM_I2C
ret = i2c_get_cur_bus_chip(chip, &dev);
if (!ret && alen != -1)
ret = i2c_set_chip_offset_len(dev, alen);
if (ret)
return i2c_report_err(ret, I2C_ERR_WRITE);
i2c_chip = dev_get_parent_platdata(dev);
if (!i2c_chip)
return i2c_report_err(ret, I2C_ERR_WRITE);
#endif
if (argc == 6 && !strcmp(argv[5], "-s")) {
/*
* Write all bytes in a single I2C transaction. If the target
* device is an EEPROM, it is your responsibility to not cross
* a page boundary. No write delay upon completion, take this
* into account if linking commands.
*/
#ifdef CONFIG_DM_I2C
i2c_chip->flags &= ~DM_I2C_CHIP_WR_ADDRESS;
ret = dm_i2c_write(dev, devaddr, memaddr, length);
#else
ret = i2c_write(chip, devaddr, alen, memaddr, length);
#endif
if (ret)
return i2c_report_err(ret, I2C_ERR_WRITE);
} else {
/*
* Repeated addressing - perform <length> separate
* write transactions of one byte each
*/
while (length-- > 0) {
#ifdef CONFIG_DM_I2C
i2c_chip->flags |= DM_I2C_CHIP_WR_ADDRESS;
ret = dm_i2c_write(dev, devaddr++, memaddr++, 1);
#else
ret = i2c_write(chip, devaddr++, alen, memaddr++, 1);
#endif
if (ret)
return i2c_report_err(ret, I2C_ERR_WRITE);
/*
* No write delay with FRAM devices.
*/
#if !defined(CONFIG_SYS_I2C_FRAM)
udelay(11000);
#endif
}
}
return 0;
}
#ifdef CONFIG_DM_I2C
static int do_i2c_flags(cmd_tbl_t *cmdtp, int flag, int argc,
char *const argv[])
{
struct udevice *dev;
uint flags;
int chip;
int ret;
if (argc < 2)
return CMD_RET_USAGE;
chip = simple_strtoul(argv[1], NULL, 16);
ret = i2c_get_cur_bus_chip(chip, &dev);
if (ret)
return i2c_report_err(ret, I2C_ERR_READ);
if (argc > 2) {
flags = simple_strtoul(argv[2], NULL, 16);
ret = i2c_set_chip_flags(dev, flags);
} else {
ret = i2c_get_chip_flags(dev, &flags);
if (!ret)
printf("%x\n", flags);
}
if (ret)
return i2c_report_err(ret, I2C_ERR_READ);
return 0;
}
static int do_i2c_olen(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
struct udevice *dev;
uint olen;
int chip;
int ret;
if (argc < 2)
return CMD_RET_USAGE;
chip = simple_strtoul(argv[1], NULL, 16);
ret = i2c_get_cur_bus_chip(chip, &dev);
if (ret)
return i2c_report_err(ret, I2C_ERR_READ);
if (argc > 2) {
olen = simple_strtoul(argv[2], NULL, 16);
ret = i2c_set_chip_offset_len(dev, olen);
} else {
ret = i2c_get_chip_offset_len(dev);
if (ret >= 0) {
printf("%x\n", ret);
ret = 0;
}
}
if (ret)
return i2c_report_err(ret, I2C_ERR_READ);
return 0;
}
#endif
/**
* 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[])
{
uint chip;
uint addr, length;
int alen;
int j, nbytes, linebytes;
int ret;
#ifdef CONFIG_DM_I2C
struct udevice *dev;
#endif
/* 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], DEFAULT_ADDR_LEN);
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);
}
#ifdef CONFIG_DM_I2C
ret = i2c_get_cur_bus_chip(chip, &dev);
if (!ret && alen != -1)
ret = i2c_set_chip_offset_len(dev, alen);
if (ret)
return i2c_report_err(ret, I2C_ERR_READ);
#endif
/*
* 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;
#ifdef CONFIG_DM_I2C
ret = dm_i2c_read(dev, addr, linebuf, linebytes);
#else
ret = i2c_read(chip, addr, alen, linebuf, linebytes);
#endif
if (ret)
return i2c_report_err(ret, I2C_ERR_READ);
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[])
{
uint chip;
ulong addr;
int alen;
uchar byte;
int count;
int ret;
#ifdef CONFIG_DM_I2C
struct udevice *dev;
#endif
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], DEFAULT_ADDR_LEN);
if (alen > 3)
return CMD_RET_USAGE;
#ifdef CONFIG_DM_I2C
ret = i2c_get_cur_bus_chip(chip, &dev);
if (!ret && alen != -1)
ret = i2c_set_chip_offset_len(dev, alen);
if (ret)
return i2c_report_err(ret, I2C_ERR_WRITE);
#endif
/*
* 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) {
#ifdef CONFIG_DM_I2C
ret = dm_i2c_write(dev, addr++, &byte, 1);
#else
ret = i2c_write(chip, addr++, alen, &byte, 1);
#endif
if (ret)
return i2c_report_err(ret, I2C_ERR_WRITE);
/*
* 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[])
{
uint chip;
ulong addr;
int alen;
int count;
uchar byte;
ulong crc;
ulong err;
int ret = 0;
#ifdef CONFIG_DM_I2C
struct udevice *dev;
#endif
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], DEFAULT_ADDR_LEN);
if (alen > 3)
return CMD_RET_USAGE;
#ifdef CONFIG_DM_I2C
ret = i2c_get_cur_bus_chip(chip, &dev);
if (!ret && alen != -1)
ret = i2c_set_chip_offset_len(dev, alen);
if (ret)
return i2c_report_err(ret, I2C_ERR_READ);
#endif
/*
* 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) {
#ifdef CONFIG_DM_I2C
ret = dm_i2c_read(dev, addr, &byte, 1);
#else
ret = i2c_read(chip, addr, alen, &byte, 1);
#endif
if (ret)
err++;
crc = crc32 (crc, &byte, 1);
addr++;
}
if (err > 0)
i2c_report_err(ret, I2C_ERR_READ);
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[])
{
uint chip;
ulong addr;
int alen;
ulong data;
int size = 1;
int nbytes;
int ret;
#ifdef CONFIG_DM_I2C
struct udevice *dev;
#endif
if (argc != 3)
return CMD_RET_USAGE;
bootretry_reset_cmd_timeout(); /* got a good command to get here */
/*
* 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], DEFAULT_ADDR_LEN);
if (alen > 3)
return CMD_RET_USAGE;
}
#ifdef CONFIG_DM_I2C
ret = i2c_get_cur_bus_chip(chip, &dev);
if (!ret && alen != -1)
ret = i2c_set_chip_offset_len(dev, alen);
if (ret)
return i2c_report_err(ret, I2C_ERR_WRITE);
#endif
/*
* Print the address, followed by value. Then accept input for
* the next value. A non-converted value exits.
*/
do {
printf("%08lx:", addr);
#ifdef CONFIG_DM_I2C
ret = dm_i2c_read(dev, addr, (uchar *)&data, size);
#else
ret = i2c_read(chip, addr, alen, (uchar *)&data, size);
#endif
if (ret)
return i2c_report_err(ret, I2C_ERR_READ);
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 = cli_readline(" ? ");
if (nbytes == 0) {
/*
* <CR> pressed as only input, don't modify current
* location and move to next.
*/
if (incrflag)
addr += size;
nbytes = size;
/* good enough to not time out */
bootretry_reset_cmd_timeout();
}
#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) {
/*
* good enough to not time out
*/
bootretry_reset_cmd_timeout();
#ifdef CONFIG_DM_I2C
ret = dm_i2c_write(dev, addr, (uchar *)&data,
size);
#else
ret = i2c_write(chip, addr, alen,
(uchar *)&data, size);
#endif
if (ret)
return i2c_report_err(ret,
I2C_ERR_WRITE);
#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 */
int ret;
#ifdef CONFIG_DM_I2C
struct udevice *bus, *dev;
if (i2c_get_cur_bus(&bus))
return CMD_RET_FAILURE;
#endif
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
#ifdef CONFIG_DM_I2C
ret = dm_i2c_probe(bus, j, 0, &dev);
#else
ret = i2c_probe(j);
#endif
if (ret == 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[])
{
uint chip;
int alen;
uint addr;
uint length;
u_char bytes[16];
int delay;
int ret;
#ifdef CONFIG_DM_I2C
struct udevice *dev;
#endif
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], DEFAULT_ADDR_LEN);
if (alen > 3)
return CMD_RET_USAGE;
#ifdef CONFIG_DM_I2C
ret = i2c_get_cur_bus_chip(chip, &dev);
if (!ret && alen != -1)
ret = i2c_set_chip_offset_len(dev, alen);
if (ret)
return i2c_report_err(ret, I2C_ERR_WRITE);
#endif
/*
* 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) {
#ifdef CONFIG_DM_I2C
ret = dm_i2c_read(dev, addr, bytes, length);
#else
ret = i2c_read(chip, addr, alen, bytes, length);
#endif
if (ret)
i2c_report_err(ret, I2C_ERR_READ);
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, DDR, DDR2, DDR3, DDR4 } type;
uint 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 7:
type = DDR;
puts("DDR\n");
break;
case 8:
type = DDR2;
puts ("DDR2\n");
break;
case 11:
type = DDR3;
puts("DDR3\n");
break;
case 12:
type = DDR4;
puts("DDR4\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[])
{
uint chip;
struct edid1_info edid;
int ret;
#ifdef CONFIG_DM_I2C
struct udevice *dev;
#endif
if (argc < 2) {
cmd_usage(cmdtp);
return 1;
}
chip = simple_strtoul(argv[1], NULL, 16);
#ifdef CONFIG_DM_I2C
ret = i2c_get_cur_bus_chip(chip, &dev);
if (!ret)
ret = dm_i2c_read(dev, 0, (uchar *)&edid, sizeof(edid));
#else
ret = i2c_read(chip, 0, 1, (uchar *)&edid, sizeof(edid));
#endif
if (ret)
return i2c_report_err(ret, I2C_ERR_READ);
if (edid_check_info(&edid)) {
puts("Content isn't valid EDID.\n");
return 1;
}
edid_print_info(&edid);
return 0;
}
#endif /* CONFIG_I2C_EDID */
#ifdef CONFIG_DM_I2C
static void show_bus(struct udevice *bus)
{
struct udevice *dev;
printf("Bus %d:\t%s", bus->req_seq, bus->name);
if (device_active(bus))
printf(" (active %d)", bus->seq);
printf("\n");
for (device_find_first_child(bus, &dev);
dev;
device_find_next_child(&dev)) {
struct dm_i2c_chip *chip = dev_get_parent_platdata(dev);
printf(" %02x: %s, offset len %x, flags %x\n",
chip->chip_addr, dev->name, chip->offset_len,
chip->flags);
}
}
#endif
/**
* 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) || defined(CONFIG_DM_I2C)
static int do_i2c_show_bus(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
if (argc == 1) {
/* show all busses */
#ifdef CONFIG_DM_I2C
struct udevice *bus;
struct uclass *uc;
int ret;
ret = uclass_get(UCLASS_I2C, &uc);
if (ret)
return CMD_RET_FAILURE;
uclass_foreach_dev(bus, uc)
show_bus(bus);
#else
int i;
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
int j;
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");
}
#endif
} else {
int i;
/* show specific bus */
i = simple_strtoul(argv[1], NULL, 10);
#ifdef CONFIG_DM_I2C
struct udevice *bus;
int ret;
ret = uclass_get_device_by_seq(UCLASS_I2C, i, &bus);
if (ret) {
printf("Invalid bus %d: err=%d\n", i, ret);
return CMD_RET_FAILURE;
}
show_bus(bus);
#else
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
int j;
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");
#endif
}
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) || \
defined(CONFIG_DM_I2C)
static int do_i2c_bus_num(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])
{
int ret = 0;
int bus_no;
if (argc == 1) {
/* querying current setting */
#ifdef CONFIG_DM_I2C
struct udevice *bus;
if (!i2c_get_cur_bus(&bus))
bus_no = bus->seq;
else
bus_no = -1;
#else
bus_no = i2c_get_bus_num();
#endif
printf("Current bus is %d\n", bus_no);
} 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);
#ifdef CONFIG_DM_I2C
ret = cmd_i2c_set_bus_num(bus_no);
#else
ret = i2c_set_bus_num(bus_no);
#endif
if (ret)
printf("Failure changing bus number (%d)\n", ret);
}
return ret ? CMD_RET_FAILURE : 0;
}
#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;
#ifdef CONFIG_DM_I2C
struct udevice *bus;
if (i2c_get_cur_bus(&bus))
return 1;
#endif
if (argc == 1) {
#ifdef CONFIG_DM_I2C
speed = dm_i2c_get_bus_speed(bus);
#else
speed = i2c_get_bus_speed();
#endif
/* querying current speed */
printf("Current bus speed=%d\n", speed);
} else {
speed = simple_strtoul(argv[1], NULL, 10);
printf("Setting bus speed to %d Hz\n", speed);
#ifdef CONFIG_DM_I2C
ret = dm_i2c_set_bus_speed(bus, speed);
#else
ret = i2c_set_bus_speed(speed);
#endif
if (ret)
printf("Failure changing bus speed (%d)\n", ret);
}
return ret ? CMD_RET_FAILURE : 0;
}
/**
* 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_DM_I2C)
struct udevice *bus;
if (i2c_get_cur_bus(&bus))
return CMD_RET_FAILURE;
if (i2c_deblock(bus)) {
printf("Error: Not supported by the driver\n");
return CMD_RET_FAILURE;
}
#elif 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) || defined(CONFIG_DM_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) || defined(CONFIG_DM_I2C)
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, 6, 0, do_i2c_write, "", ""),
#ifdef CONFIG_DM_I2C
U_BOOT_CMD_MKENT(flags, 2, 1, do_i2c_flags, "", ""),
U_BOOT_CMD_MKENT(olen, 2, 1, do_i2c_olen, "", ""),
#endif
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 __maybe_unused void i2c_reloc(void)
{
static int relocated;
if (!relocated) {
fixup_cmdtable(cmd_i2c_sub, ARRAY_SIZE(cmd_i2c_sub));
relocated = 1;
};
}
/**
* 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;
#ifdef CONFIG_NEEDS_MANUAL_RELOC
i2c_reloc();
#endif
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) || defined(CONFIG_DM_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) || defined(CONFIG_DM_I2C)
"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 [-s] - write memory\n"
" to I2C; the -s option selects bulk write in a single transaction\n"
#ifdef CONFIG_DM_I2C
"i2c flags chip [flags] - set or get chip flags\n"
"i2c olen chip [offset_length] - set or get chip offset length\n"
#endif
"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, 7, 1, do_i2c,
"I2C sub-system",
i2c_help_text
);
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