diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/gpio/sandbox.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/gpio/sandbox.c | 254 |
1 files changed, 0 insertions, 254 deletions
diff --git a/qemu/roms/u-boot/drivers/gpio/sandbox.c b/qemu/roms/u-boot/drivers/gpio/sandbox.c deleted file mode 100644 index 22b6a5f79..000000000 --- a/qemu/roms/u-boot/drivers/gpio/sandbox.c +++ /dev/null @@ -1,254 +0,0 @@ -/* - * Copyright (c) 2011 The Chromium OS Authors. - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <dm.h> -#include <fdtdec.h> -#include <malloc.h> -#include <asm/gpio.h> - -DECLARE_GLOBAL_DATA_PTR; - -/* Flags for each GPIO */ -#define GPIOF_OUTPUT (1 << 0) /* Currently set as an output */ -#define GPIOF_HIGH (1 << 1) /* Currently set high */ -#define GPIOF_RESERVED (1 << 2) /* Is in use / requested */ - -struct gpio_state { - const char *label; /* label given by requester */ - u8 flags; /* flags (GPIOF_...) */ -}; - -/* Access routines for GPIO state */ -static u8 *get_gpio_flags(struct device *dev, unsigned offset) -{ - struct gpio_dev_priv *uc_priv = dev->uclass_priv; - struct gpio_state *state = dev_get_priv(dev); - - if (offset >= uc_priv->gpio_count) { - static u8 invalid_flags; - printf("sandbox_gpio: error: invalid gpio %u\n", offset); - return &invalid_flags; - } - - return &state[offset].flags; -} - -static int get_gpio_flag(struct device *dev, unsigned offset, int flag) -{ - return (*get_gpio_flags(dev, offset) & flag) != 0; -} - -static int set_gpio_flag(struct device *dev, unsigned offset, int flag, - int value) -{ - u8 *gpio = get_gpio_flags(dev, offset); - - if (value) - *gpio |= flag; - else - *gpio &= ~flag; - - return 0; -} - -static int check_reserved(struct device *dev, unsigned offset, - const char *func) -{ - if (!get_gpio_flag(dev, offset, GPIOF_RESERVED)) { - printf("sandbox_gpio: %s: error: offset %u not reserved\n", - func, offset); - return -1; - } - - return 0; -} - -/* - * Back-channel sandbox-internal-only access to GPIO state - */ - -int sandbox_gpio_get_value(struct device *dev, unsigned offset) -{ - if (get_gpio_flag(dev, offset, GPIOF_OUTPUT)) - debug("sandbox_gpio: get_value on output gpio %u\n", offset); - return get_gpio_flag(dev, offset, GPIOF_HIGH); -} - -int sandbox_gpio_set_value(struct device *dev, unsigned offset, int value) -{ - return set_gpio_flag(dev, offset, GPIOF_HIGH, value); -} - -int sandbox_gpio_get_direction(struct device *dev, unsigned offset) -{ - return get_gpio_flag(dev, offset, GPIOF_OUTPUT); -} - -int sandbox_gpio_set_direction(struct device *dev, unsigned offset, int output) -{ - return set_gpio_flag(dev, offset, GPIOF_OUTPUT, output); -} - -/* - * These functions implement the public interface within U-Boot - */ - -/* set GPIO port 'offset' as an input */ -static int sb_gpio_direction_input(struct device *dev, unsigned offset) -{ - debug("%s: offset:%u\n", __func__, offset); - - if (check_reserved(dev, offset, __func__)) - return -1; - - return sandbox_gpio_set_direction(dev, offset, 0); -} - -/* set GPIO port 'offset' as an output, with polarity 'value' */ -static int sb_gpio_direction_output(struct device *dev, unsigned offset, - int value) -{ - debug("%s: offset:%u, value = %d\n", __func__, offset, value); - - if (check_reserved(dev, offset, __func__)) - return -1; - - return sandbox_gpio_set_direction(dev, offset, 1) | - sandbox_gpio_set_value(dev, offset, value); -} - -/* read GPIO IN value of port 'offset' */ -static int sb_gpio_get_value(struct device *dev, unsigned offset) -{ - debug("%s: offset:%u\n", __func__, offset); - - if (check_reserved(dev, offset, __func__)) - return -1; - - return sandbox_gpio_get_value(dev, offset); -} - -/* write GPIO OUT value to port 'offset' */ -static int sb_gpio_set_value(struct device *dev, unsigned offset, int value) -{ - debug("%s: offset:%u, value = %d\n", __func__, offset, value); - - if (check_reserved(dev, offset, __func__)) - return -1; - - if (!sandbox_gpio_get_direction(dev, offset)) { - printf("sandbox_gpio: error: set_value on input gpio %u\n", - offset); - return -1; - } - - return sandbox_gpio_set_value(dev, offset, value); -} - -static int sb_gpio_request(struct device *dev, unsigned offset, - const char *label) -{ - struct gpio_dev_priv *uc_priv = dev->uclass_priv; - struct gpio_state *state = dev_get_priv(dev); - - debug("%s: offset:%u, label:%s\n", __func__, offset, label); - - if (offset >= uc_priv->gpio_count) { - printf("sandbox_gpio: error: invalid gpio %u\n", offset); - return -1; - } - - if (get_gpio_flag(dev, offset, GPIOF_RESERVED)) { - printf("sandbox_gpio: error: gpio %u already reserved\n", - offset); - return -1; - } - - state[offset].label = label; - return set_gpio_flag(dev, offset, GPIOF_RESERVED, 1); -} - -static int sb_gpio_free(struct device *dev, unsigned offset) -{ - struct gpio_state *state = dev_get_priv(dev); - - debug("%s: offset:%u\n", __func__, offset); - - if (check_reserved(dev, offset, __func__)) - return -1; - - state[offset].label = NULL; - return set_gpio_flag(dev, offset, GPIOF_RESERVED, 0); -} - -static int sb_gpio_get_state(struct device *dev, unsigned int offset, - char *buf, int bufsize) -{ - struct gpio_dev_priv *uc_priv = dev->uclass_priv; - struct gpio_state *state = dev_get_priv(dev); - const char *label; - - label = state[offset].label; - snprintf(buf, bufsize, "%s%d: %s: %d [%c]%s%s", - uc_priv->bank_name ? uc_priv->bank_name : "", offset, - sandbox_gpio_get_direction(dev, offset) ? "out" : " in", - sandbox_gpio_get_value(dev, offset), - get_gpio_flag(dev, offset, GPIOF_RESERVED) ? 'x' : ' ', - label ? " " : "", - label ? label : ""); - - return 0; -} - -static const struct dm_gpio_ops gpio_sandbox_ops = { - .request = sb_gpio_request, - .free = sb_gpio_free, - .direction_input = sb_gpio_direction_input, - .direction_output = sb_gpio_direction_output, - .get_value = sb_gpio_get_value, - .set_value = sb_gpio_set_value, - .get_state = sb_gpio_get_state, -}; - -static int sandbox_gpio_ofdata_to_platdata(struct device *dev) -{ - struct gpio_dev_priv *uc_priv = dev->uclass_priv; - - uc_priv->gpio_count = fdtdec_get_int(gd->fdt_blob, dev->of_offset, - "num-gpios", 0); - uc_priv->bank_name = fdt_getprop(gd->fdt_blob, dev->of_offset, - "gpio-bank-name", NULL); - - return 0; -} - -static int gpio_sandbox_probe(struct device *dev) -{ - struct gpio_dev_priv *uc_priv = dev->uclass_priv; - - if (dev->of_offset == -1) { - /* Tell the uclass how many GPIOs we have */ - uc_priv->gpio_count = CONFIG_SANDBOX_GPIO_COUNT; - } - - dev->priv = calloc(sizeof(struct gpio_state), uc_priv->gpio_count); - - return 0; -} - -static const struct device_id sandbox_gpio_ids[] = { - { .compatible = "sandbox,gpio" }, - { } -}; - -U_BOOT_DRIVER(gpio_sandbox) = { - .name = "gpio_sandbox", - .id = UCLASS_GPIO, - .of_match = sandbox_gpio_ids, - .ofdata_to_platdata = sandbox_gpio_ofdata_to_platdata, - .probe = gpio_sandbox_probe, - .ops = &gpio_sandbox_ops, -}; |