+++ /dev/null
-/*
- * Copyright 2013 Texas Instruments, Inc.
- * Author: Dan Murphy <dmurphy@ti.com>
- *
- * Derived work from the pca953x.c driver
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <config.h>
-#include <command.h>
-#include <i2c.h>
-#include <tca642x.h>
-
-/* tca642x register address definitions */
-struct tca642x_bank_info tca642x_regs[] = {
- { .input_reg = 0x00,
- .output_reg = 0x04,
- .polarity_reg = 0x08,
- .configuration_reg = 0x0c },
- { .input_reg = 0x01,
- .output_reg = 0x05,
- .polarity_reg = 0x09,
- .configuration_reg = 0x0d },
- { .input_reg = 0x02,
- .output_reg = 0x06,
- .polarity_reg = 0x0a,
- .configuration_reg = 0x0e },
-};
-
-/*
- * Modify masked bits in register
- */
-static int tca642x_reg_write(uchar chip, uint8_t addr,
- uint8_t reg_bit, uint8_t data)
-{
- uint8_t valw;
- int org_bus_num;
- int ret;
-
- org_bus_num = i2c_get_bus_num();
- i2c_set_bus_num(CFG_SYS_I2C_TCA642X_BUS_NUM);
-
- if (i2c_read(chip, addr, 1, (uint8_t *)&valw, 1)) {
- printf("Could not read before writing\n");
- ret = -1;
- goto error;
- }
- valw &= ~reg_bit;
- valw |= data;
-
- ret = i2c_write(chip, addr, 1, (u8 *)&valw, 1);
-
-error:
- i2c_set_bus_num(org_bus_num);
- return ret;
-}
-
-static int tca642x_reg_read(uchar chip, uint8_t addr, uint8_t *data)
-{
- uint8_t valw;
- int org_bus_num;
- int ret = 0;
-
- org_bus_num = i2c_get_bus_num();
- i2c_set_bus_num(CFG_SYS_I2C_TCA642X_BUS_NUM);
- if (i2c_read(chip, addr, 1, (u8 *)&valw, 1)) {
- ret = -1;
- goto error;
- }
-
- *data = valw;
-
-error:
- i2c_set_bus_num(org_bus_num);
- return ret;
-}
-
-/*
- * Set output value of IO pins in 'reg_bit' to corresponding value in 'data'
- * 0 = low, 1 = high
- */
-int tca642x_set_val(uchar chip, uint8_t gpio_bank,
- uint8_t reg_bit, uint8_t data)
-{
- uint8_t out_reg = tca642x_regs[gpio_bank].output_reg;
-
- return tca642x_reg_write(chip, out_reg, reg_bit, data);
-}
-
-/*
- * Set read polarity of IO pins in 'reg_bit' to corresponding value in 'data'
- * 0 = read pin value, 1 = read inverted pin value
- */
-int tca642x_set_pol(uchar chip, uint8_t gpio_bank,
- uint8_t reg_bit, uint8_t data)
-{
- uint8_t pol_reg = tca642x_regs[gpio_bank].polarity_reg;
-
- return tca642x_reg_write(chip, pol_reg, reg_bit, data);
-}
-
-/*
- * Set direction of IO pins in 'reg_bit' to corresponding value in 'data'
- * 0 = output, 1 = input
- */
-int tca642x_set_dir(uchar chip, uint8_t gpio_bank,
- uint8_t reg_bit, uint8_t data)
-{
- uint8_t config_reg = tca642x_regs[gpio_bank].configuration_reg;
-
- return tca642x_reg_write(chip, config_reg, reg_bit, data);
-}
-
-/*
- * Read current logic level of all IO pins
- */
-int tca642x_get_val(uchar chip, uint8_t gpio_bank)
-{
- uint8_t val;
- uint8_t in_reg = tca642x_regs[gpio_bank].input_reg;
-
- if (tca642x_reg_read(chip, in_reg, &val) < 0)
- return -1;
-
- return (int)val;
-}
-
-/*
- * Set the inital register states for the tca642x gpio expander
- */
-int tca642x_set_inital_state(uchar chip, struct tca642x_bank_info init_data[])
-{
- int i, ret;
- uint8_t config_reg;
- uint8_t polarity_reg;
- uint8_t output_reg;
-
- for (i = 0; i < 3; i++) {
- config_reg = tca642x_regs[i].configuration_reg;
- ret = tca642x_reg_write(chip, config_reg, 0xff,
- init_data[i].configuration_reg);
- polarity_reg = tca642x_regs[i].polarity_reg;
- ret = tca642x_reg_write(chip, polarity_reg, 0xff,
- init_data[i].polarity_reg);
- output_reg = tca642x_regs[i].output_reg;
- ret = tca642x_reg_write(chip, output_reg, 0xff,
- init_data[i].output_reg);
- }
-
- return ret;
-}
-
-#if defined(CONFIG_CMD_TCA642X) && !defined(CONFIG_XPL_BUILD)
-/*
- * Display tca642x information
- */
-static int tca642x_info(uchar chip)
-{
- int i, j;
- uint8_t data;
-
- printf("tca642x@ 0x%x (%d pins):\n", chip, 24);
- for (i = 0; i < 3; i++) {
- printf("Bank %i\n", i);
- if (tca642x_reg_read(chip,
- tca642x_regs[i].configuration_reg,
- &data) < 0)
- return -1;
- printf("\tConfiguration: ");
- for (j = 7; j >= 0; j--)
- printf("%c", data & (1 << j) ? 'i' : 'o');
- printf("\n");
-
- if (tca642x_reg_read(chip,
- tca642x_regs[i].polarity_reg, &data) < 0)
- return -1;
- printf("\tPolarity: ");
- for (j = 7; j >= 0; j--)
- printf("%c", data & (1 << j) ? '1' : '0');
- printf("\n");
-
- if (tca642x_reg_read(chip,
- tca642x_regs[i].input_reg, &data) < 0)
- return -1;
- printf("\tInput value: ");
- for (j = 7; j >= 0; j--)
- printf("%c", data & (1 << j) ? '1' : '0');
- printf("\n");
-
- if (tca642x_reg_read(chip,
- tca642x_regs[i].output_reg, &data) < 0)
- return -1;
- printf("\tOutput value: ");
- for (j = 7; j >= 0; j--)
- printf("%c", data & (1 << j) ? '1' : '0');
- printf("\n");
- }
-
- return 0;
-}
-
-static int tca642x_get_bank(int pin)
-{
- int gpio_bank;
-
- if (pin <= 7) {
- gpio_bank = 0;
- } else if ((pin >= 10) && (pin <= 17)) {
- gpio_bank = 1;
- } else if ((pin >= 20) && (pin <= 27)) {
- gpio_bank = 2;
- } else {
- printf("Requested pin is not available\n");
- gpio_bank = -1;
- }
-
- return gpio_bank;
-}
-
-static struct cmd_tbl cmd_tca642x[] = {
- U_BOOT_CMD_MKENT(device, 3, 0, (void *)TCA642X_CMD_DEVICE, "", ""),
- U_BOOT_CMD_MKENT(output, 4, 0, (void *)TCA642X_CMD_OUTPUT, "", ""),
- U_BOOT_CMD_MKENT(input, 3, 0, (void *)TCA642X_CMD_INPUT, "", ""),
- U_BOOT_CMD_MKENT(invert, 4, 0, (void *)TCA642X_CMD_INVERT, "", ""),
- U_BOOT_CMD_MKENT(info, 2, 0, (void *)TCA642X_CMD_INFO, "", ""),
-};
-
-static int do_tca642x(struct cmd_tbl *cmdtp, int flag, int argc,
- char *const argv[])
-{
- static uchar chip = CFG_SYS_I2C_TCA642X_ADDR;
- int ret = CMD_RET_USAGE, val;
- int gpio_bank = 0;
- uint8_t bank_shift;
- ulong ul_arg2 = 0;
- ulong ul_arg3 = 0;
- struct cmd_tbl *c;
-
- c = find_cmd_tbl(argv[1], cmd_tca642x, ARRAY_SIZE(cmd_tca642x));
-
- /* All commands but "device" require 'maxargs' arguments */
- if (!c ||
- !((argc == (c->maxargs)) ||
- (((int)c->cmd == TCA642X_CMD_DEVICE) &&
- (argc == (c->maxargs - 1))))) {
- return CMD_RET_USAGE;
- }
-
- /* arg2 used as chip number or pin number */
- if (argc > 2)
- ul_arg2 = dectoul(argv[2], NULL);
-
- /* arg3 used as pin or invert value */
- if (argc > 3)
- ul_arg3 = dectoul(argv[3], NULL) & 0x1;
-
- switch ((int)c->cmd) {
- case TCA642X_CMD_INFO:
- ret = tca642x_info(chip);
- if (ret)
- ret = CMD_RET_FAILURE;
- break;
-
- case TCA642X_CMD_DEVICE:
- if (argc == 3)
- chip = (uint8_t)ul_arg2;
- printf("Current device address: 0x%x\n", chip);
- ret = CMD_RET_SUCCESS;
- break;
-
- case TCA642X_CMD_INPUT:
- gpio_bank = tca642x_get_bank(ul_arg2);
- if (gpio_bank < 0) {
- ret = CMD_RET_FAILURE;
- goto error;
- }
- bank_shift = ul_arg2 - (gpio_bank * 10);
- ret = tca642x_set_dir(chip, gpio_bank, (1 << bank_shift),
- TCA642X_DIR_IN << bank_shift);
- val = (tca642x_get_val(chip, gpio_bank) &
- (1 << bank_shift)) != 0;
-
- if (ret)
- ret = CMD_RET_FAILURE;
- else
- printf("chip 0x%02x, pin 0x%lx = %d\n", chip,
- ul_arg2, val);
- break;
-
- case TCA642X_CMD_OUTPUT:
- gpio_bank = tca642x_get_bank(ul_arg2);
- if (gpio_bank < 0) {
- ret = CMD_RET_FAILURE;
- goto error;
- }
- bank_shift = ul_arg2 - (gpio_bank * 10);
- ret = tca642x_set_dir(chip, gpio_bank, (1 << bank_shift),
- (TCA642X_DIR_OUT << bank_shift));
- if (!ret)
- ret = tca642x_set_val(chip,
- gpio_bank, (1 << bank_shift),
- (ul_arg3 << bank_shift));
- if (ret)
- ret = CMD_RET_FAILURE;
- break;
-
- case TCA642X_CMD_INVERT:
- gpio_bank = tca642x_get_bank(ul_arg2);
- if (gpio_bank < 0) {
- ret = CMD_RET_FAILURE;
- goto error;
- }
- bank_shift = ul_arg2 - (gpio_bank * 10);
- ret = tca642x_set_pol(chip, gpio_bank, (1 << bank_shift),
- (ul_arg3 << bank_shift));
- if (ret)
- ret = CMD_RET_FAILURE;
- break;
- }
-error:
- if (ret == CMD_RET_FAILURE)
- eprintf("Error talking to chip at 0x%x\n", chip);
-
- return ret;
-}
-
-U_BOOT_CMD(
- tca642x, 5, 1, do_tca642x,
- "tca642x gpio access",
- "device [dev]\n"
- " - show or set current device address\n"
- "tca642x info\n"
- " - display info for current chip\n"
- "tca642x output pin 0|1\n"
- " - set pin as output and drive low or high\n"
- "tca642x invert pin 0|1\n"
- " - disable/enable polarity inversion for reads\n"
- "tca642x input pin\n"
- " - set pin as input and read value"
-);
-
-#endif /* CONFIG_CMD_TCA642X */
+++ /dev/null
-/*
- * Copyright 2013 Texas Instruments, Inc.
- * Author: Dan Murphy <dmurphy@ti.com>
- *
- * Derived work from the pca953x.c driver
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#ifndef __TCA642X_H_
-#define __TCA642X_H_
-
-#ifdef CONFIG_CMD_TCA642X
-enum {
- TCA642X_CMD_INFO,
- TCA642X_CMD_DEVICE,
- TCA642X_CMD_OUTPUT,
- TCA642X_CMD_INPUT,
- TCA642X_CMD_INVERT,
-};
-#endif
-
-#define TCA642X_OUT_LOW 0
-#define TCA642X_OUT_HIGH 1
-#define TCA642X_POL_NORMAL 0
-#define TCA642X_POL_INVERT 1
-#define TCA642X_DIR_OUT 0
-#define TCA642X_DIR_IN 1
-
-/* Default to an address that hopefully won't corrupt other i2c devices */
-#ifndef CFG_SYS_I2C_TCA642X_ADDR
-#define CFG_SYS_I2C_TCA642X_ADDR (~0)
-#endif
-
-/* Default to an address that hopefully won't corrupt other i2c devices */
-#ifndef CFG_SYS_I2C_TCA642X_BUS_NUM
-#define CFG_SYS_I2C_TCA642X_BUS_NUM (0)
-#endif
-
-struct tca642x_bank_info {
- uint8_t input_reg;
- uint8_t output_reg;
- uint8_t polarity_reg;
- uint8_t configuration_reg;
-};
-
-int tca642x_set_val(uchar chip, uint8_t gpio_bank,
- uint8_t reg_bit, uint8_t data);
-int tca642x_set_pol(uchar chip, uint8_t gpio_bank,
- uint8_t reg_bit, uint8_t data);
-int tca642x_set_dir(uchar chip, uint8_t gpio_bank,
- uint8_t reg_bit, uint8_t data);
-int tca642x_get_val(uchar chip, uint8_t gpio_bank);
-int tca642x_set_inital_state(uchar chip, struct tca642x_bank_info init_data[]);
-
-#endif /* __TCA642X_H_ */
projects / thirdparty / u-boot.git / commitdiff
