X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fgpio%2Fsandbox.c;h=a9b1efcd061222220be45b881ec3a119164ab7f8;hb=6d846c726b300fcb4e5b9228709e6752459e7553;hp=3c6cfec179dc2f0988ecc3ef54f33d9725c463de;hpb=3be2bdf5dc69b3142c1162a59bc67191c9077567;p=u-boot diff --git a/drivers/gpio/sandbox.c b/drivers/gpio/sandbox.c index 3c6cfec179..a9b1efcd06 100644 --- a/drivers/gpio/sandbox.c +++ b/drivers/gpio/sandbox.c @@ -4,46 +4,47 @@ */ #include +#include +#include +#include #include +#include + +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_...) */ }; -/* - * State of GPIOs - * TODO: Put this into sandbox state - */ -static struct gpio_state state[CONFIG_SANDBOX_GPIO_COUNT]; - /* Access routines for GPIO state */ -static u8 *get_gpio_flags(unsigned gp) +static u8 *get_gpio_flags(struct udevice *dev, unsigned offset) { - /* assert()'s could be disabled, so make sure we handle that */ - assert(gp < ARRAY_SIZE(state)); - if (gp >= ARRAY_SIZE(state)) { + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + 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", gp); + printf("sandbox_gpio: error: invalid gpio %u\n", offset); return &invalid_flags; } - return &state[gp].flags; + return &state[offset].flags; } -static int get_gpio_flag(unsigned gp, int flag) +static int get_gpio_flag(struct udevice *dev, unsigned offset, int flag) { - return (*get_gpio_flags(gp) & flag) != 0; + return (*get_gpio_flags(dev, offset) & flag) != 0; } -static int set_gpio_flag(unsigned gp, int flag, int value) +static int set_gpio_flag(struct udevice *dev, unsigned offset, int flag, + int value) { - u8 *gpio = get_gpio_flags(gp); + u8 *gpio = get_gpio_flags(dev, offset); if (value) *gpio |= flag; @@ -53,141 +54,154 @@ static int set_gpio_flag(unsigned gp, int flag, int value) return 0; } -static int check_reserved(unsigned gpio, const char *func) -{ - if (!get_gpio_flag(gpio, GPIOF_RESERVED)) { - printf("sandbox_gpio: %s: error: gpio %u not reserved\n", - func, gpio); - return -1; - } - - return 0; -} - /* * Back-channel sandbox-internal-only access to GPIO state */ -int sandbox_gpio_get_value(unsigned gp) +int sandbox_gpio_get_value(struct udevice *dev, unsigned offset) { - if (get_gpio_flag(gp, GPIOF_OUTPUT)) - debug("sandbox_gpio: get_value on output gpio %u\n", gp); - return get_gpio_flag(gp, GPIOF_HIGH); + 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(unsigned gp, int value) +int sandbox_gpio_set_value(struct udevice *dev, unsigned offset, int value) { - return set_gpio_flag(gp, GPIOF_HIGH, value); + return set_gpio_flag(dev, offset, GPIOF_HIGH, value); } -int sandbox_gpio_get_direction(unsigned gp) +int sandbox_gpio_get_direction(struct udevice *dev, unsigned offset) { - return get_gpio_flag(gp, GPIOF_OUTPUT); + return get_gpio_flag(dev, offset, GPIOF_OUTPUT); } -int sandbox_gpio_set_direction(unsigned gp, int output) +int sandbox_gpio_set_direction(struct udevice *dev, unsigned offset, int output) { - return set_gpio_flag(gp, GPIOF_OUTPUT, output); + return set_gpio_flag(dev, offset, GPIOF_OUTPUT, output); } /* * These functions implement the public interface within U-Boot */ -/* set GPIO port 'gp' as an input */ -int gpio_direction_input(unsigned gp) +/* set GPIO port 'offset' as an input */ +static int sb_gpio_direction_input(struct udevice *dev, unsigned offset) { - debug("%s: gp:%u\n", __func__, gp); - - if (check_reserved(gp, __func__)) - return -1; + debug("%s: offset:%u\n", __func__, offset); - return sandbox_gpio_set_direction(gp, 0); + return sandbox_gpio_set_direction(dev, offset, 0); } -/* set GPIO port 'gp' as an output, with polarity 'value' */ -int gpio_direction_output(unsigned gp, int value) +/* set GPIO port 'offset' as an output, with polarity 'value' */ +static int sb_gpio_direction_output(struct udevice *dev, unsigned offset, + int value) { - debug("%s: gp:%u, value = %d\n", __func__, gp, value); + debug("%s: offset:%u, value = %d\n", __func__, offset, value); - if (check_reserved(gp, __func__)) - return -1; - - return sandbox_gpio_set_direction(gp, 1) | - sandbox_gpio_set_value(gp, value); + return sandbox_gpio_set_direction(dev, offset, 1) | + sandbox_gpio_set_value(dev, offset, value); } -/* read GPIO IN value of port 'gp' */ -int gpio_get_value(unsigned gp) +/* read GPIO IN value of port 'offset' */ +static int sb_gpio_get_value(struct udevice *dev, unsigned offset) { - debug("%s: gp:%u\n", __func__, gp); + debug("%s: offset:%u\n", __func__, offset); - if (check_reserved(gp, __func__)) - return -1; - - return sandbox_gpio_get_value(gp); + return sandbox_gpio_get_value(dev, offset); } -/* write GPIO OUT value to port 'gp' */ -int gpio_set_value(unsigned gp, int value) +/* write GPIO OUT value to port 'offset' */ +static int sb_gpio_set_value(struct udevice *dev, unsigned offset, int value) { - debug("%s: gp:%u, value = %d\n", __func__, gp, value); - - if (check_reserved(gp, __func__)) - return -1; + debug("%s: offset:%u, value = %d\n", __func__, offset, value); - if (!sandbox_gpio_get_direction(gp)) { - printf("sandbox_gpio: error: set_value on input gpio %u\n", gp); + 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(gp, value); + return sandbox_gpio_set_value(dev, offset, value); } -int gpio_request(unsigned gp, const char *label) +static int sb_gpio_get_function(struct udevice *dev, unsigned offset) { - debug("%s: gp:%u, label:%s\n", __func__, gp, label); - - if (gp >= ARRAY_SIZE(state)) { - printf("sandbox_gpio: error: invalid gpio %u\n", gp); - return -1; - } + if (get_gpio_flag(dev, offset, GPIOF_OUTPUT)) + return GPIOF_OUTPUT; + return GPIOF_INPUT; +} - if (get_gpio_flag(gp, GPIOF_RESERVED)) { - printf("sandbox_gpio: error: gpio %u already reserved\n", gp); - return -1; - } +static int sb_gpio_xlate(struct udevice *dev, struct gpio_desc *desc, + struct fdtdec_phandle_args *args) +{ + desc->offset = args->args[0]; + if (args->args_count < 2) + return 0; + if (args->args[1] & GPIO_ACTIVE_LOW) + desc->flags |= GPIOD_ACTIVE_LOW; + if (args->args[1] & 2) + desc->flags |= GPIOD_IS_IN; + if (args->args[1] & 4) + desc->flags |= GPIOD_IS_OUT; + if (args->args[1] & 8) + desc->flags |= GPIOD_IS_OUT_ACTIVE; - state[gp].label = label; - return set_gpio_flag(gp, GPIOF_RESERVED, 1); + return 0; } -int gpio_free(unsigned gp) +static const struct dm_gpio_ops gpio_sandbox_ops = { + .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_function = sb_gpio_get_function, + .xlate = sb_gpio_xlate, +}; + +static int sandbox_gpio_ofdata_to_platdata(struct udevice *dev) { - debug("%s: gp:%u\n", __func__, gp); + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); - if (check_reserved(gp, __func__)) - return -1; + 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); - state[gp].label = NULL; - return set_gpio_flag(gp, GPIOF_RESERVED, 0); + return 0; } -/* Display GPIO information */ -void gpio_info(void) +static int gpio_sandbox_probe(struct udevice *dev) { - unsigned gpio; + struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); + + 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); - puts("Sandbox GPIOs\n"); + return 0; +} - for (gpio = 0; gpio < ARRAY_SIZE(state); ++gpio) { - const char *label = state[gpio].label; +static int gpio_sandbox_remove(struct udevice *dev) +{ + free(dev->priv); - printf("%4d: %s: %d [%c] %s\n", - gpio, - sandbox_gpio_get_direction(gpio) ? "out" : " in", - sandbox_gpio_get_value(gpio), - get_gpio_flag(gpio, GPIOF_RESERVED) ? 'x' : ' ', - label ? label : ""); - } + return 0; } + +static const struct udevice_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, + .remove = gpio_sandbox_remove, + .ops = &gpio_sandbox_ops, +};