|
|
|
@ -4,8 +4,13 @@ |
|
|
|
|
*/ |
|
|
|
|
|
|
|
|
|
#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 */ |
|
|
|
@ -16,34 +21,30 @@ struct gpio_state { |
|
|
|
|
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 device *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->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", 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 device *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 device *dev, unsigned offset, int flag, |
|
|
|
|
int value) |
|
|
|
|
{ |
|
|
|
|
u8 *gpio = get_gpio_flags(gp); |
|
|
|
|
u8 *gpio = get_gpio_flags(dev, offset); |
|
|
|
|
|
|
|
|
|
if (value) |
|
|
|
|
*gpio |= flag; |
|
|
|
@ -53,11 +54,12 @@ static int set_gpio_flag(unsigned gp, int flag, int value) |
|
|
|
|
return 0; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
static int check_reserved(unsigned gpio, const char *func) |
|
|
|
|
static int check_reserved(struct device *dev, unsigned offset, |
|
|
|
|
const char *func) |
|
|
|
|
{ |
|
|
|
|
if (!get_gpio_flag(gpio, GPIOF_RESERVED)) { |
|
|
|
|
printf("sandbox_gpio: %s: error: gpio %u not reserved\n", |
|
|
|
|
func, gpio); |
|
|
|
|
if (!get_gpio_flag(dev, offset, GPIOF_RESERVED)) { |
|
|
|
|
printf("sandbox_gpio: %s: error: offset %u not reserved\n", |
|
|
|
|
func, offset); |
|
|
|
|
return -1; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
@ -68,126 +70,185 @@ static int check_reserved(unsigned gpio, const char *func) |
|
|
|
|
* Back-channel sandbox-internal-only access to GPIO state |
|
|
|
|
*/ |
|
|
|
|
|
|
|
|
|
int sandbox_gpio_get_value(unsigned gp) |
|
|
|
|
int sandbox_gpio_get_value(struct device *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 device *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 device *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 device *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 device *dev, unsigned offset) |
|
|
|
|
{ |
|
|
|
|
debug("%s: gp:%u\n", __func__, gp); |
|
|
|
|
debug("%s: offset:%u\n", __func__, offset); |
|
|
|
|
|
|
|
|
|
if (check_reserved(gp, __func__)) |
|
|
|
|
if (check_reserved(dev, offset, __func__)) |
|
|
|
|
return -1; |
|
|
|
|
|
|
|
|
|
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 device *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__)) |
|
|
|
|
if (check_reserved(dev, offset, __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 device *dev, unsigned offset) |
|
|
|
|
{ |
|
|
|
|
debug("%s: gp:%u\n", __func__, gp); |
|
|
|
|
debug("%s: offset:%u\n", __func__, offset); |
|
|
|
|
|
|
|
|
|
if (check_reserved(gp, __func__)) |
|
|
|
|
if (check_reserved(dev, offset, __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 device *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__)) |
|
|
|
|
if (check_reserved(dev, offset, __func__)) |
|
|
|
|
return -1; |
|
|
|
|
|
|
|
|
|
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_request(struct device *dev, unsigned offset, |
|
|
|
|
const char *label) |
|
|
|
|
{ |
|
|
|
|
debug("%s: gp:%u, label:%s\n", __func__, gp, 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 (gp >= ARRAY_SIZE(state)) { |
|
|
|
|
printf("sandbox_gpio: error: invalid gpio %u\n", gp); |
|
|
|
|
if (offset >= uc_priv->gpio_count) { |
|
|
|
|
printf("sandbox_gpio: error: invalid gpio %u\n", offset); |
|
|
|
|
return -1; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
if (get_gpio_flag(gp, GPIOF_RESERVED)) { |
|
|
|
|
printf("sandbox_gpio: error: gpio %u already reserved\n", gp); |
|
|
|
|
if (get_gpio_flag(dev, offset, GPIOF_RESERVED)) { |
|
|
|
|
printf("sandbox_gpio: error: gpio %u already reserved\n", |
|
|
|
|
offset); |
|
|
|
|
return -1; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
state[gp].label = label; |
|
|
|
|
return set_gpio_flag(gp, GPIOF_RESERVED, 1); |
|
|
|
|
state[offset].label = label; |
|
|
|
|
return set_gpio_flag(dev, offset, GPIOF_RESERVED, 1); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
int gpio_free(unsigned gp) |
|
|
|
|
static int sb_gpio_free(struct device *dev, unsigned offset) |
|
|
|
|
{ |
|
|
|
|
debug("%s: gp:%u\n", __func__, gp); |
|
|
|
|
struct gpio_state *state = dev_get_priv(dev); |
|
|
|
|
|
|
|
|
|
debug("%s: offset:%u\n", __func__, offset); |
|
|
|
|
|
|
|
|
|
if (check_reserved(gp, __func__)) |
|
|
|
|
if (check_reserved(dev, offset, __func__)) |
|
|
|
|
return -1; |
|
|
|
|
|
|
|
|
|
state[gp].label = NULL; |
|
|
|
|
return set_gpio_flag(gp, GPIOF_RESERVED, 0); |
|
|
|
|
state[offset].label = NULL; |
|
|
|
|
return set_gpio_flag(dev, offset, GPIOF_RESERVED, 0); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
/* Display GPIO information */ |
|
|
|
|
void gpio_info(void) |
|
|
|
|
static int sb_gpio_get_state(struct device *dev, unsigned int offset, |
|
|
|
|
char *buf, int bufsize) |
|
|
|
|
{ |
|
|
|
|
unsigned gpio; |
|
|
|
|
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 : ""); |
|
|
|
|
|
|
|
|
|
puts("Sandbox GPIOs\n"); |
|
|
|
|
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; |
|
|
|
|
|
|
|
|
|
for (gpio = 0; gpio < ARRAY_SIZE(state); ++gpio) { |
|
|
|
|
const char *label = state[gpio].label; |
|
|
|
|
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); |
|
|
|
|
|
|
|
|
|
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 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, |
|
|
|
|
}; |
|
|
|
|