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- // SPDX-License-Identifier: GPL-2.0+
- #include <common.h>
- #include <command.h>
- #include <dm.h>
- #include <hexdump.h>
- #include <i2c.h>
- #include <mapmem.h>
- #include <rtc.h>
- #define MAX_RTC_BYTES 32
- static int do_rtc_read(struct udevice *dev, int argc, char * const argv[])
- {
- u8 buf[MAX_RTC_BYTES];
- int reg, len, ret, r;
- if (argc < 2 || argc > 3)
- return CMD_RET_USAGE;
- reg = hextoul(argv[0], NULL);
- len = hextoul(argv[1], NULL);
- if (argc == 3) {
- u8 *addr;
- addr = map_sysmem(hextoul(argv[2], NULL), len);
- ret = dm_rtc_read(dev, reg, addr, len);
- unmap_sysmem(addr);
- if (ret) {
- printf("dm_rtc_read() failed: %d\n", ret);
- return CMD_RET_FAILURE;
- }
- return CMD_RET_SUCCESS;
- }
- while (len) {
- r = min_t(int, len, sizeof(buf));
- ret = dm_rtc_read(dev, reg, buf, r);
- if (ret) {
- printf("dm_rtc_read() failed: %d\n", ret);
- return CMD_RET_FAILURE;
- }
- print_buffer(reg, buf, 1, r, 0);
- len -= r;
- reg += r;
- }
- return CMD_RET_SUCCESS;
- }
- static int do_rtc_write(struct udevice *dev, int argc, char * const argv[])
- {
- u8 buf[MAX_RTC_BYTES];
- int reg, len, ret;
- const char *s;
- int slen;
- if (argc < 2 || argc > 3)
- return CMD_RET_USAGE;
- reg = hextoul(argv[0], NULL);
- if (argc == 3) {
- u8 *addr;
- len = hextoul(argv[1], NULL);
- addr = map_sysmem(hextoul(argv[2], NULL), len);
- ret = dm_rtc_write(dev, reg, addr, len);
- unmap_sysmem(addr);
- if (ret) {
- printf("dm_rtc_write() failed: %d\n", ret);
- return CMD_RET_FAILURE;
- }
- return CMD_RET_SUCCESS;
- }
- s = argv[1];
- slen = strlen(s);
- if (slen % 2) {
- printf("invalid hex string\n");
- return CMD_RET_FAILURE;
- }
- while (slen) {
- len = min_t(int, slen / 2, sizeof(buf));
- if (hex2bin(buf, s, len)) {
- printf("invalid hex string\n");
- return CMD_RET_FAILURE;
- }
- ret = dm_rtc_write(dev, reg, buf, len);
- if (ret) {
- printf("dm_rtc_write() failed: %d\n", ret);
- return CMD_RET_FAILURE;
- }
- s += 2 * len;
- slen -= 2 * len;
- }
- return CMD_RET_SUCCESS;
- }
- int do_rtc(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
- {
- static int curr_rtc;
- struct udevice *dev;
- int ret, idx;
- if (argc < 2)
- return CMD_RET_USAGE;
- argc--;
- argv++;
- if (!strcmp(argv[0], "list")) {
- struct uclass *uc;
- idx = 0;
- uclass_id_foreach_dev(UCLASS_RTC, dev, uc) {
- printf("RTC #%d - %s\n", idx++, dev->name);
- }
- if (!idx) {
- printf("*** no RTC devices available ***\n");
- return CMD_RET_FAILURE;
- }
- return CMD_RET_SUCCESS;
- }
- idx = curr_rtc;
- if (!strcmp(argv[0], "dev") && argc >= 2)
- idx = dectoul(argv[1], NULL);
- ret = uclass_get_device(UCLASS_RTC, idx, &dev);
- if (ret) {
- printf("Cannot find RTC #%d: err=%d\n", idx, ret);
- return CMD_RET_FAILURE;
- }
- if (!strcmp(argv[0], "dev")) {
- /* Show the existing or newly selected RTC */
- if (argc >= 2)
- curr_rtc = idx;
- printf("RTC #%d - %s\n", idx, dev->name);
- return CMD_RET_SUCCESS;
- }
- if (!strcmp(argv[0], "read"))
- return do_rtc_read(dev, argc - 1, argv + 1);
- if (!strcmp(argv[0], "write"))
- return do_rtc_write(dev, argc - 1, argv + 1);
- return CMD_RET_USAGE;
- }
- U_BOOT_CMD(
- rtc, 5, 0, do_rtc,
- "RTC subsystem",
- "list - show available rtc devices\n"
- "rtc dev [n] - show or set current rtc device\n"
- "rtc read <reg> <count> - read and display 8-bit registers starting at <reg>\n"
- "rtc read <reg> <count> <addr> - read 8-bit registers starting at <reg> to memory <addr>\n"
- "rtc write <reg> <hexstring> - write 8-bit registers starting at <reg>\n"
- "rtc write <reg> <count> <addr> - write from memory <addr> to 8-bit registers starting at <reg>\n"
- );
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