diff options
Diffstat (limited to 'drivers/gpio/sandbox.c')
| -rw-r--r-- | drivers/gpio/sandbox.c | 138 |
1 files changed, 90 insertions, 48 deletions
diff --git a/drivers/gpio/sandbox.c b/drivers/gpio/sandbox.c index dc8d506e8d..d008fdd222 100644 --- a/drivers/gpio/sandbox.c +++ b/drivers/gpio/sandbox.c @@ -19,42 +19,51 @@ #include <dt-bindings/gpio/gpio.h> #include <dt-bindings/gpio/sandbox-gpio.h> - struct gpio_state { const char *label; /* label given by requester */ - ulong dir_flags; /* dir_flags (GPIOD_...) */ + ulong flags; /* flags (GPIOD_...) */ }; -/* Access routines for GPIO dir flags */ -static ulong *get_gpio_dir_flags(struct udevice *dev, unsigned int offset) +/* Access routines for GPIO info */ +static struct gpio_state *get_gpio_state(struct udevice *dev, uint offset) { 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 ulong invalid_dir_flags; printf("sandbox_gpio: error: invalid gpio %u\n", offset); - return &invalid_dir_flags; + return NULL; } - return &state[offset].dir_flags; + return &state[offset]; +} + +/* Access routines for GPIO flags */ +static ulong *get_gpio_flags(struct udevice *dev, unsigned int offset) +{ + struct gpio_state *state = get_gpio_state(dev, offset); + + if (!state) + return NULL; + + return &state->flags; } static int get_gpio_flag(struct udevice *dev, unsigned int offset, ulong flag) { - return (*get_gpio_dir_flags(dev, offset) & flag) != 0; + return (*get_gpio_flags(dev, offset) & flag) != 0; } static int set_gpio_flag(struct udevice *dev, unsigned int offset, ulong flag, int value) { - ulong *gpio = get_gpio_dir_flags(dev, offset); + struct gpio_state *state = get_gpio_state(dev, offset); if (value) - *gpio |= flag; + state->flags |= flag; else - *gpio &= ~flag; + state->flags &= ~flag; return 0; } @@ -65,14 +74,31 @@ static int set_gpio_flag(struct udevice *dev, unsigned int offset, ulong flag, int sandbox_gpio_get_value(struct udevice *dev, unsigned offset) { + struct gpio_state *state = get_gpio_state(dev, offset); + bool val; + if (get_gpio_flag(dev, offset, GPIOD_IS_OUT)) debug("sandbox_gpio: get_value on output gpio %u\n", offset); - return get_gpio_flag(dev, offset, GPIOD_IS_OUT_ACTIVE); + + if (state->flags & GPIOD_EXT_DRIVEN) { + val = state->flags & GPIOD_EXT_HIGH; + } else { + if (state->flags & GPIOD_EXT_PULL_UP) + val = true; + else if (state->flags & GPIOD_EXT_PULL_DOWN) + val = false; + else + val = state->flags & GPIOD_PULL_UP; + } + + return val; } int sandbox_gpio_set_value(struct udevice *dev, unsigned offset, int value) { - return set_gpio_flag(dev, offset, GPIOD_IS_OUT_ACTIVE, value); + set_gpio_flag(dev, offset, GPIOD_EXT_DRIVEN | GPIOD_EXT_HIGH, value); + + return 0; } int sandbox_gpio_get_direction(struct udevice *dev, unsigned offset) @@ -83,20 +109,23 @@ int sandbox_gpio_get_direction(struct udevice *dev, unsigned offset) int sandbox_gpio_set_direction(struct udevice *dev, unsigned offset, int output) { set_gpio_flag(dev, offset, GPIOD_IS_OUT, output); - set_gpio_flag(dev, offset, GPIOD_IS_IN, !(output)); + set_gpio_flag(dev, offset, GPIOD_IS_IN, !output); return 0; } -ulong sandbox_gpio_get_dir_flags(struct udevice *dev, unsigned int offset) +ulong sandbox_gpio_get_flags(struct udevice *dev, uint offset) { - return *get_gpio_dir_flags(dev, offset); + ulong flags = *get_gpio_flags(dev, offset); + + return flags & ~GPIOD_SANDBOX_MASK; } -int sandbox_gpio_set_dir_flags(struct udevice *dev, unsigned int offset, - ulong flags) +int sandbox_gpio_set_flags(struct udevice *dev, uint offset, ulong flags) { - *get_gpio_dir_flags(dev, offset) = flags; + struct gpio_state *state = get_gpio_state(dev, offset); + + state->flags = flags; return 0; } @@ -117,10 +146,19 @@ static int sb_gpio_direction_input(struct udevice *dev, unsigned offset) static int sb_gpio_direction_output(struct udevice *dev, unsigned offset, int value) { + int ret; + debug("%s: offset:%u, value = %d\n", __func__, offset, value); - return sandbox_gpio_set_direction(dev, offset, 1) | - sandbox_gpio_set_value(dev, offset, value); + ret = sandbox_gpio_set_direction(dev, offset, 1); + if (ret) + return ret; + ret = set_gpio_flag(dev, offset, GPIOD_IS_OUT_ACTIVE | + GPIOD_EXT_DRIVEN | GPIOD_EXT_HIGH, value); + if (ret) + return ret; + + return 0; } /* read GPIO IN value of port 'offset' */ @@ -134,6 +172,8 @@ static int sb_gpio_get_value(struct udevice *dev, unsigned offset) /* write GPIO OUT value to port 'offset' */ static int sb_gpio_set_value(struct udevice *dev, unsigned offset, int value) { + int ret; + debug("%s: offset:%u, value = %d\n", __func__, offset, value); if (!sandbox_gpio_get_direction(dev, offset)) { @@ -142,7 +182,12 @@ static int sb_gpio_set_value(struct udevice *dev, unsigned offset, int value) return -1; } - return sandbox_gpio_set_value(dev, offset, value); + ret = set_gpio_flag(dev, offset, GPIOD_IS_OUT_ACTIVE | + GPIOD_EXT_DRIVEN | GPIOD_EXT_HIGH, value); + if (ret) + return ret; + + return 0; } static int sb_gpio_get_function(struct udevice *dev, unsigned offset) @@ -177,33 +222,30 @@ static int sb_gpio_xlate(struct udevice *dev, struct gpio_desc *desc, return 0; } -static int sb_gpio_set_dir_flags(struct udevice *dev, unsigned int offset, - ulong flags) +static int sb_gpio_set_flags(struct udevice *dev, unsigned int offset, + ulong flags) { - ulong *dir_flags; - - debug("%s: offset:%u, dir_flags = %lx\n", __func__, offset, flags); - - dir_flags = get_gpio_dir_flags(dev, offset); - - /* - * For testing purposes keep the output value when switching to input. - * This allows us to manipulate the input value via the gpio command. - */ - if (flags & GPIOD_IS_IN) - *dir_flags = (flags & ~GPIOD_IS_OUT_ACTIVE) | - (*dir_flags & GPIOD_IS_OUT_ACTIVE); - else - *dir_flags = flags; + debug("%s: offset:%u, flags = %lx\n", __func__, offset, flags); + struct gpio_state *state = get_gpio_state(dev, offset); + + if (flags & GPIOD_IS_OUT) { + flags |= GPIOD_EXT_DRIVEN; + if (flags & GPIOD_IS_OUT_ACTIVE) + flags |= GPIOD_EXT_HIGH; + else + flags &= ~GPIOD_EXT_HIGH; + } else { + flags |= state->flags & GPIOD_SANDBOX_MASK; + } + state->flags = flags; return 0; } -static int sb_gpio_get_dir_flags(struct udevice *dev, unsigned int offset, - ulong *flags) +static int sb_gpio_get_flags(struct udevice *dev, uint offset, ulong *flagsp) { debug("%s: offset:%u\n", __func__, offset); - *flags = *get_gpio_dir_flags(dev, offset); + *flagsp = *get_gpio_flags(dev, offset) & ~GPIOD_SANDBOX_MASK; return 0; } @@ -272,8 +314,8 @@ static const struct dm_gpio_ops gpio_sandbox_ops = { .set_value = sb_gpio_set_value, .get_function = sb_gpio_get_function, .xlate = sb_gpio_xlate, - .set_dir_flags = sb_gpio_set_dir_flags, - .get_dir_flags = sb_gpio_get_dir_flags, + .set_flags = sb_gpio_set_flags, + .get_flags = sb_gpio_get_flags, #if CONFIG_IS_ENABLED(ACPIGEN) .get_acpi = sb_gpio_get_acpi, #endif @@ -456,7 +498,7 @@ static const char *sb_pinctrl_get_pin_name(struct udevice *dev, return pin_name; } -static char *get_dir_flags_string(ulong flags) +static char *get_flags_string(ulong flags) { if (flags & GPIOD_OPEN_DRAIN) return "drive-open-drain"; @@ -475,7 +517,7 @@ static int sb_pinctrl_get_pin_muxing(struct udevice *dev, { struct udevice *gpio_dev; unsigned int gpio_idx; - ulong dir_flags; + ulong flags; int function; /* look up for the bank which owns the requested pin */ @@ -484,11 +526,11 @@ static int sb_pinctrl_get_pin_muxing(struct udevice *dev, snprintf(buf, size, "Error"); } else { function = sb_gpio_get_function(gpio_dev, gpio_idx); - dir_flags = *get_gpio_dir_flags(gpio_dev, gpio_idx); + flags = *get_gpio_flags(gpio_dev, gpio_idx); snprintf(buf, size, "gpio %s %s", function == GPIOF_OUTPUT ? "output" : "input", - get_dir_flags_string(dir_flags)); + get_flags_string(flags)); } return 0; |