+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright 2008 Extreme Engineering Solutions, Inc.
- */
-
-/*
- * Driver for DS4510, a CPU supervisor with integrated EEPROM, SRAM,
- * and 4 programmable non-volatile GPIO pins.
- */
-
-#include <i2c.h>
-#include <command.h>
-#include <linux/delay.h>
-#include "ds4510.h"
-
-enum {
- DS4510_CMD_INFO,
- DS4510_CMD_DEVICE,
- DS4510_CMD_NV,
- DS4510_CMD_RSTDELAY,
- DS4510_CMD_OUTPUT,
- DS4510_CMD_INPUT,
- DS4510_CMD_PULLUP,
- DS4510_CMD_EEPROM,
- DS4510_CMD_SEEPROM,
- DS4510_CMD_SRAM,
-};
-
-/*
- * Write to DS4510, taking page boundaries into account
- */
-static int ds4510_mem_write(uint8_t chip, int offset, uint8_t *buf, int count)
-{
- int wrlen;
- int i = 0;
-
- do {
- wrlen = DS4510_EEPROM_PAGE_SIZE -
- DS4510_EEPROM_PAGE_OFFSET(offset);
- if (count < wrlen)
- wrlen = count;
- if (i2c_write(chip, offset, 1, &buf[i], wrlen))
- return -1;
-
- /*
- * This delay isn't needed for SRAM writes but shouldn't delay
- * things too much, so do it unconditionally for simplicity
- */
- udelay(DS4510_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
- count -= wrlen;
- offset += wrlen;
- i += wrlen;
- } while (count > 0);
-
- return 0;
-}
-
-/*
- * General read from DS4510
- */
-static int ds4510_mem_read(uint8_t chip, int offset, uint8_t *buf, int count)
-{
- return i2c_read(chip, offset, 1, buf, count);
-}
-
-/*
- * Write SEE bit in config register.
- * nv = 0 - Writes to SEEPROM registers behave like EEPROM
- * nv = 1 - Writes to SEEPROM registers behave like SRAM
- */
-static int ds4510_see_write(uint8_t chip, uint8_t nv)
-{
- uint8_t data;
-
- if (i2c_read(chip, DS4510_CFG, 1, &data, 1))
- return -1;
-
- if (nv) /* Treat SEEPROM bits as EEPROM */
- data &= ~DS4510_CFG_SEE;
- else /* Treat SEEPROM bits as SRAM */
- data |= DS4510_CFG_SEE;
-
- return ds4510_mem_write(chip, DS4510_CFG, &data, 1);
-}
-
-/*
- * Write de-assertion of reset signal delay
- */
-static int ds4510_rstdelay_write(uint8_t chip, uint8_t delay)
-{
- uint8_t data;
-
- if (i2c_read(chip, DS4510_RSTDELAY, 1, &data, 1))
- return -1;
-
- data &= ~DS4510_RSTDELAY_MASK;
- data |= delay & DS4510_RSTDELAY_MASK;
-
- return ds4510_mem_write(chip, DS4510_RSTDELAY, &data, 1);
-}
-
-/*
- * Write pullup characteristics of IO pins
- */
-static int ds4510_pullup_write(uint8_t chip, uint8_t val)
-{
- val &= DS4510_IO_MASK;
-
- return ds4510_mem_write(chip, DS4510_PULLUP, (uint8_t *)&val, 1);
-}
-
-/*
- * Read pullup characteristics of IO pins
- */
-static int ds4510_pullup_read(uint8_t chip)
-{
- uint8_t val;
-
- if (i2c_read(chip, DS4510_PULLUP, 1, &val, 1))
- return -1;
-
- return val & DS4510_IO_MASK;
-}
-
-/*
- * Write drive level of IO pins
- */
-static int ds4510_gpio_write(uint8_t chip, uint8_t val)
-{
- uint8_t data;
- int i;
-
- for (i = 0; i < DS4510_NUM_IO; i++) {
- if (i2c_read(chip, DS4510_IO0 - i, 1, &data, 1))
- return -1;
-
- if (val & (0x1 << i))
- data |= 0x1;
- else
- data &= ~0x1;
-
- if (ds4510_mem_write(chip, DS4510_IO0 - i, &data, 1))
- return -1;
- }
-
- return 0;
-}
-
-/*
- * Read drive level of IO pins
- */
-static int ds4510_gpio_read(uint8_t chip)
-{
- uint8_t data;
- int val = 0;
- int i;
-
- for (i = 0; i < DS4510_NUM_IO; i++) {
- if (i2c_read(chip, DS4510_IO0 - i, 1, &data, 1))
- return -1;
-
- if (data & 1)
- val |= (1 << i);
- }
-
- return val;
-}
-
-/*
- * Read physical level of IO pins
- */
-static int ds4510_gpio_read_val(uint8_t chip)
-{
- uint8_t val;
-
- if (i2c_read(chip, DS4510_IO_STATUS, 1, &val, 1))
- return -1;
-
- return val & DS4510_IO_MASK;
-}
-
-/*
- * Display DS4510 information
- */
-static int ds4510_info(uint8_t chip)
-{
- int i;
- int tmp;
- uint8_t data;
-
- printf("DS4510 @ 0x%x:\n\n", chip);
-
- if (i2c_read(chip, DS4510_RSTDELAY, 1, &data, 1))
- return -1;
- printf("rstdelay = 0x%x\n\n", data & DS4510_RSTDELAY_MASK);
-
- if (i2c_read(chip, DS4510_CFG, 1, &data, 1))
- return -1;
- printf("config = 0x%x\n", data);
- printf(" /ready = %d\n", data & DS4510_CFG_READY ? 1 : 0);
- printf(" trip pt = %d\n", data & DS4510_CFG_TRIP_POINT ? 1 : 0);
- printf(" rst sts = %d\n", data & DS4510_CFG_RESET ? 1 : 0);
- printf(" /see = %d\n", data & DS4510_CFG_SEE ? 1 : 0);
- printf(" swrst = %d\n\n", data & DS4510_CFG_SWRST ? 1 : 0);
-
- printf("gpio pins: 3210\n");
- printf("---------------\n");
- printf("pullup ");
-
- tmp = ds4510_pullup_read(chip);
- if (tmp == -1)
- return tmp;
- for (i = DS4510_NUM_IO - 1; i >= 0; i--)
- printf("%d", (tmp & (1 << i)) ? 1 : 0);
- printf("\n");
-
- printf("driven ");
- tmp = ds4510_gpio_read(chip);
- if (tmp == -1)
- return -1;
- for (i = DS4510_NUM_IO - 1; i >= 0; i--)
- printf("%d", (tmp & (1 << i)) ? 1 : 0);
- printf("\n");
-
- printf("read ");
- tmp = ds4510_gpio_read_val(chip);
- if (tmp == -1)
- return -1;
- for (i = DS4510_NUM_IO - 1; i >= 0; i--)
- printf("%d", (tmp & (1 << i)) ? 1 : 0);
- printf("\n");
-
- return 0;
-}
-
-struct cmd_tbl cmd_ds4510[] = {
- U_BOOT_CMD_MKENT(device, 3, 0, (void *)DS4510_CMD_DEVICE, "", ""),
- U_BOOT_CMD_MKENT(nv, 3, 0, (void *)DS4510_CMD_NV, "", ""),
- U_BOOT_CMD_MKENT(output, 4, 0, (void *)DS4510_CMD_OUTPUT, "", ""),
- U_BOOT_CMD_MKENT(input, 3, 0, (void *)DS4510_CMD_INPUT, "", ""),
- U_BOOT_CMD_MKENT(pullup, 4, 0, (void *)DS4510_CMD_PULLUP, "", ""),
- U_BOOT_CMD_MKENT(info, 2, 0, (void *)DS4510_CMD_INFO, "", ""),
- U_BOOT_CMD_MKENT(rstdelay, 3, 0, (void *)DS4510_CMD_RSTDELAY, "", ""),
- U_BOOT_CMD_MKENT(eeprom, 6, 0, (void *)DS4510_CMD_EEPROM, "", ""),
- U_BOOT_CMD_MKENT(seeprom, 6, 0, (void *)DS4510_CMD_SEEPROM, "", ""),
- U_BOOT_CMD_MKENT(sram, 6, 0, (void *)DS4510_CMD_SRAM, "", ""),
-};
-
-int do_ds4510(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
-{
- static uint8_t chip = 0x51;
- struct cmd_tbl *c;
- ulong ul_arg2 = 0;
- ulong ul_arg3 = 0;
- int tmp;
- ulong addr;
- ulong off;
- ulong cnt;
- int end;
- int (*rw_func)(uint8_t, int, uint8_t *, int);
-
- c = find_cmd_tbl(argv[1], cmd_ds4510, ARRAY_SIZE(cmd_ds4510));
-
- /* All commands but "device" require 'maxargs' arguments */
- if (!c || !((argc == (c->maxargs)) ||
- (((int)c->cmd == DS4510_CMD_DEVICE) &&
- (argc == (c->maxargs - 1))))) {
- return cmd_usage(cmdtp);
- }
-
- /* arg2 used as chip addr and pin number */
- if (argc > 2)
- ul_arg2 = hextoul(argv[2], NULL);
-
- /* arg3 used as output/pullup value */
- if (argc > 3)
- ul_arg3 = hextoul(argv[3], NULL);
-
- switch ((int)c->cmd) {
- case DS4510_CMD_DEVICE:
- if (argc == 3)
- chip = ul_arg2;
- printf("Current device address: 0x%x\n", chip);
- return 0;
- case DS4510_CMD_NV:
- return ds4510_see_write(chip, ul_arg2);
- case DS4510_CMD_OUTPUT:
- tmp = ds4510_gpio_read(chip);
- if (tmp == -1)
- return -1;
- if (ul_arg3)
- tmp |= (1 << ul_arg2);
- else
- tmp &= ~(1 << ul_arg2);
- return ds4510_gpio_write(chip, tmp);
- case DS4510_CMD_INPUT:
- tmp = ds4510_gpio_read_val(chip);
- if (tmp == -1)
- return -1;
- return (tmp & (1 << ul_arg2)) != 0;
- case DS4510_CMD_PULLUP:
- tmp = ds4510_pullup_read(chip);
- if (tmp == -1)
- return -1;
- if (ul_arg3)
- tmp |= (1 << ul_arg2);
- else
- tmp &= ~(1 << ul_arg2);
- return ds4510_pullup_write(chip, tmp);
- case DS4510_CMD_INFO:
- return ds4510_info(chip);
- case DS4510_CMD_RSTDELAY:
- return ds4510_rstdelay_write(chip, ul_arg2);
- case DS4510_CMD_EEPROM:
- end = DS4510_EEPROM + DS4510_EEPROM_SIZE;
- off = DS4510_EEPROM;
- break;
- case DS4510_CMD_SEEPROM:
- end = DS4510_SEEPROM + DS4510_SEEPROM_SIZE;
- off = DS4510_SEEPROM;
- break;
- case DS4510_CMD_SRAM:
- end = DS4510_SRAM + DS4510_SRAM_SIZE;
- off = DS4510_SRAM;
- break;
- default:
- /* We should never get here... */
- return 1;
- }
-
- /* Only eeprom, seeprom, and sram commands should make it here */
- if (strcmp(argv[2], "read") == 0)
- rw_func = ds4510_mem_read;
- else if (strcmp(argv[2], "write") == 0)
- rw_func = ds4510_mem_write;
- else
- return cmd_usage(cmdtp);
-
- addr = hextoul(argv[3], NULL);
- off += hextoul(argv[4], NULL);
- cnt = hextoul(argv[5], NULL);
-
- if ((off + cnt) > end) {
- printf("ERROR: invalid len\n");
- return -1;
- }
-
- return rw_func(chip, off, (uint8_t *)addr, cnt);
-}
-
-U_BOOT_CMD(
- ds4510, 6, 1, do_ds4510,
- "ds4510 eeprom/seeprom/sram/gpio access",
- "device [dev]\n"
- " - show or set current device address\n"
- "ds4510 info\n"
- " - display ds4510 info\n"
- "ds4510 output pin 0|1\n"
- " - set pin low or high-Z\n"
- "ds4510 input pin\n"
- " - read value of pin\n"
- "ds4510 pullup pin 0|1\n"
- " - disable/enable pullup on specified pin\n"
- "ds4510 nv 0|1\n"
- " - make gpio and seeprom writes volatile/non-volatile"
- "\n"
- "ds4510 rstdelay 0-3\n"
- " - set reset output delay"
- "\n"
- "ds4510 eeprom read addr off cnt\n"
- "ds4510 eeprom write addr off cnt\n"
- " - read/write 'cnt' bytes at EEPROM offset 'off'\n"
- "ds4510 seeprom read addr off cnt\n"
- "ds4510 seeprom write addr off cnt\n"
- " - read/write 'cnt' bytes at SRAM-shadowed EEPROM offset 'off'\n"
- "ds4510 sram read addr off cnt\n"
- "ds4510 sram write addr off cnt\n"
- " - read/write 'cnt' bytes at SRAM offset 'off'"
-);
projects / thirdparty / u-boot.git / commitdiff
