u-boot/cmd/w1.c
Simon Glass 8b85dfc675 dm: Avoid accessing seq directly
At present various drivers etc. access the device's 'seq' member directly.
This makes it harder to change the meaning of that member. Change access
to go through a function instead.

The drivers/i2c/lpc32xx_i2c.c file is left unchanged for now.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-18 20:32:21 -07:00

127 lines
2.7 KiB
C

/* SPDX-License-Identifier: GPL-2.0+
*
* (C) Copyright 2018
* Microchip Technology, Inc.
* Eugen Hristev <eugen.hristev@microchip.com>
*/
#include <common.h>
#include <command.h>
#include <dm.h>
#include <w1.h>
#include <w1-eeprom.h>
#include <dm/device-internal.h>
static int w1_bus(void)
{
struct udevice *bus, *dev;
int ret;
ret = w1_get_bus(0, &bus);
if (ret) {
printf("one wire interface not found\n");
return CMD_RET_FAILURE;
}
printf("Bus %d:\t%s", dev_seq(bus), bus->name);
if (device_active(bus))
printf(" (active)");
printf("\n");
for (device_find_first_child(bus, &dev);
dev;
device_find_next_child(&dev)) {
ret = device_probe(dev);
printf("\t%s (%d) uclass %s : ", dev->name, dev_seq(dev),
dev->uclass->uc_drv->name);
if (ret)
printf("device error\n");
else
printf("family 0x%x\n", w1_get_device_family(dev));
}
return CMD_RET_SUCCESS;
}
static int w1_read(int argc, char *const argv[])
{
int bus_n = 0, dev_n = 0, offset = 0, len = 512;
int i;
struct udevice *bus, *dev;
int ret;
u8 buf[512];
if (argc > 2)
bus_n = simple_strtoul(argv[2], NULL, 10);
if (argc > 3)
dev_n = simple_strtoul(argv[3], NULL, 10);
if (argc > 4)
offset = simple_strtoul(argv[4], NULL, 10);
if (argc > 5)
len = simple_strtoul(argv[5], NULL, 10);
if (len > 512) {
printf("len needs to be <= 512\n");
return CMD_RET_FAILURE;
}
ret = w1_get_bus(bus_n, &bus);
if (ret) {
printf("one wire interface not found\n");
return CMD_RET_FAILURE;
}
for (device_find_first_child(bus, &dev), i = 0;
dev && i <= dev_n;
device_find_next_child(&dev), i++) {
ret = device_probe(dev);
if (!ret && i == dev_n)
break;
}
if (i != dev_n || ret || !dev) {
printf("invalid dev\n");
return CMD_RET_FAILURE;
}
if (strcmp(dev->uclass->uc_drv->name, "w1_eeprom")) {
printf("the device present on the interface is of unknown device class\n");
return CMD_RET_FAILURE;
}
ret = w1_eeprom_read_buf(dev, offset, (u8 *)buf, len);
if (ret) {
printf("error reading device %s\n", dev->name);
return CMD_RET_FAILURE;
}
for (i = 0; i < len; i++)
printf("%x", buf[i]);
printf("\n");
return CMD_RET_SUCCESS;
}
int do_w1(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
{
if (argc < 2)
return CMD_RET_USAGE;
if (!strcmp(argv[1], "bus"))
return w1_bus();
if (!strcmp(argv[1], "read"))
return w1_read(argc, argv);
return CMD_RET_SUCCESS;
}
U_BOOT_CMD(w1, 6, 0, do_w1,
"onewire interface utility commands",
"bus - show onewire bus info (all)\n"
"w1 read [<bus> [<dev> [offset [length]]]]"
" - read from onewire device 'dev' on onewire bus 'bus'"
" starting from offset 'offset' and length 'length'\n"
" defaults: bus 0, dev 0, offset 0, length 512 bytes.");