diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/gpio/sx151x.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/gpio/sx151x.c | 242 |
1 files changed, 0 insertions, 242 deletions
diff --git a/qemu/roms/u-boot/drivers/gpio/sx151x.c b/qemu/roms/u-boot/drivers/gpio/sx151x.c deleted file mode 100644 index 167cf40c7..000000000 --- a/qemu/roms/u-boot/drivers/gpio/sx151x.c +++ /dev/null @@ -1,242 +0,0 @@ -/* - * (C) Copyright 2013 - * Viktar Palstsiuk, Promwad, viktar.palstsiuk@promwad.com - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -/* - * Driver for Semtech SX151x SPI GPIO Expanders - */ - -#include <common.h> -#include <spi.h> -#include <sx151x.h> - -#ifndef CONFIG_SX151X_SPI_BUS -#define CONFIG_SX151X_SPI_BUS 0 -#endif - -/* - * The SX151x registers - */ - -#ifdef CONFIG_SX151X_GPIO_COUNT_8 -/* 8bit: SX1511 */ -#define SX151X_REG_DIR 0x07 -#define SX151X_REG_DATA 0x08 -#else -/* 16bit: SX1512 */ -#define SX151X_REG_DIR 0x0F -#define SX151X_REG_DATA 0x11 -#endif -#define SX151X_REG_RESET 0x7D - -static int sx151x_spi_write(int chip, unsigned char reg, unsigned char val) -{ - struct spi_slave *slave; - unsigned char buf[2]; - int ret; - - slave = spi_setup_slave(CONFIG_SX151X_SPI_BUS, chip, 1000000, - SPI_MODE_0); - if (!slave) - return 0; - - spi_claim_bus(slave); - - buf[0] = reg; - buf[1] = val; - - ret = spi_xfer(slave, 16, buf, NULL, SPI_XFER_BEGIN | SPI_XFER_END); - if (ret < 0) - printf("spi%d.%d write fail: can't write %02x to %02x: %d\n", - CONFIG_SX151X_SPI_BUS, chip, val, reg, ret); - else - printf("spi%d.%d write 0x%02x to register 0x%02x\n", - CONFIG_SX151X_SPI_BUS, chip, val, reg); - spi_release_bus(slave); - spi_free_slave(slave); - - return ret; -} - -static int sx151x_spi_read(int chip, unsigned char reg) -{ - struct spi_slave *slave; - int ret; - - slave = spi_setup_slave(CONFIG_SX151X_SPI_BUS, chip, 1000000, - SPI_MODE_0); - if (!slave) - return 0; - - spi_claim_bus(slave); - - ret = spi_w8r8(slave, reg | 0x80); - if (ret < 0) - printf("spi%d.%d read fail: can't read %02x: %d\n", - CONFIG_SX151X_SPI_BUS, chip, reg, ret); - else - printf("spi%d.%d read register 0x%02x: 0x%02x\n", - CONFIG_SX151X_SPI_BUS, chip, reg, ret); - - spi_release_bus(slave); - spi_free_slave(slave); - - return ret; -} - -static inline void sx151x_find_cfg(int gpio, unsigned char *reg, unsigned char *mask) -{ - *reg -= gpio / 8; - *mask = 1 << (gpio % 8); -} - -static int sx151x_write_cfg(int chip, unsigned char gpio, unsigned char reg, int val) -{ - unsigned char mask; - unsigned char data; - int ret; - - sx151x_find_cfg(gpio, ®, &mask); - ret = sx151x_spi_read(chip, reg); - if (ret < 0) - return ret; - else - data = ret; - data &= ~mask; - data |= (val << (gpio % 8)) & mask; - return sx151x_spi_write(chip, reg, data); -} - -int sx151x_get_value(int chip, int gpio) -{ - unsigned char reg = SX151X_REG_DATA; - unsigned char mask; - int ret; - - sx151x_find_cfg(gpio, ®, &mask); - ret = sx151x_spi_read(chip, reg); - if (ret >= 0) - ret = (ret & mask) != 0 ? 1 : 0; - - return ret; -} - -int sx151x_set_value(int chip, int gpio, int val) -{ - return sx151x_write_cfg(chip, gpio, SX151X_REG_DATA, (val ? 1 : 0)); -} - -int sx151x_direction_input(int chip, int gpio) -{ - return sx151x_write_cfg(chip, gpio, SX151X_REG_DIR, 1); -} - -int sx151x_direction_output(int chip, int gpio) -{ - return sx151x_write_cfg(chip, gpio, SX151X_REG_DIR, 0); -} - -int sx151x_reset(int chip) -{ - int err; - - err = sx151x_spi_write(chip, SX151X_REG_RESET, 0x12); - if (err < 0) - return err; - - err = sx151x_spi_write(chip, SX151X_REG_RESET, 0x34); - return err; -} - -#ifdef CONFIG_CMD_SX151X - -int do_sx151x(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) -{ - int ret = CMD_RET_USAGE, chip = 0, gpio = 0, val = 0; - - if (argc < 3) - return CMD_RET_USAGE; - - /* arg2 used as chip number */ - chip = simple_strtoul(argv[2], NULL, 10); - - if (strcmp(argv[1], "reset") == 0) { - ret = sx151x_reset(chip); - if (!ret) { - printf("Device at spi%d.%d was reset\n", - CONFIG_SX151X_SPI_BUS, chip); - } - return ret; - } - - if (argc < 4) - return CMD_RET_USAGE; - - /* arg3 used as gpio number */ - gpio = simple_strtoul(argv[3], NULL, 10); - - if (strcmp(argv[1], "get") == 0) { - ret = sx151x_get_value(chip, gpio); - if (ret < 0) - printf("Failed to get value at spi%d.%d gpio %d\n", - CONFIG_SX151X_SPI_BUS, chip, gpio); - else { - printf("Value at spi%d.%d gpio %d is %d\n", - CONFIG_SX151X_SPI_BUS, chip, gpio, ret); - ret = 0; - } - return ret; - } - - if (argc < 5) - return CMD_RET_USAGE; - - /* arg4 used as value or direction */ - val = simple_strtoul(argv[4], NULL, 10); - - if (strcmp(argv[1], "set") == 0) { - ret = sx151x_set_value(chip, gpio, val); - if (ret < 0) - printf("Failed to set value at spi%d.%d gpio %d\n", - CONFIG_SX151X_SPI_BUS, chip, gpio); - else - printf("New value at spi%d.%d gpio %d is %d\n", - CONFIG_SX151X_SPI_BUS, chip, gpio, val); - return ret; - } else if (strcmp(argv[1], "dir") == 0) { - if (val == 0) - ret = sx151x_direction_output(chip, gpio); - else - ret = sx151x_direction_input(chip, gpio); - - if (ret < 0) - printf("Failed to set direction of spi%d.%d gpio %d\n", - CONFIG_SX151X_SPI_BUS, chip, gpio); - else - printf("New direction of spi%d.%d gpio %d is %d\n", - CONFIG_SX151X_SPI_BUS, chip, gpio, val); - return ret; - } - - printf("Please see usage\n"); - - return ret; -} - -U_BOOT_CMD( - sx151x, 5, 1, do_sx151x, - "sx151x gpio access", - "dir chip gpio 0|1\n" - " - set gpio direction (0 for output, 1 for input)\n" - "sx151x get chip gpio\n" - " - get gpio value\n" - "sx151x set chip gpio 0|1\n" - " - set gpio value\n" - "sx151x reset chip\n" - " - reset chip" -); - -#endif /* CONFIG_CMD_SX151X */ |