danh-arm
commit
094a935de2
|
|
@ -476,6 +476,18 @@ memory layout implies some image overlaying like in ARM standard platforms.
|
|||
|
||||
Defines the maximum address that the TSP's progbits sections can occupy.
|
||||
|
||||
If the platform port uses the PL061 GPIO driver, the following constant may
|
||||
optionally be defined:
|
||||
|
||||
* **PLAT_PL061_MAX_GPIOS**
|
||||
Maximum number of GPIOs required by the platform. This allows control how
|
||||
much memory is allocated for PL061 GPIO controllers. The default value is
|
||||
32.
|
||||
[For example, define the build flag in platform.mk]:
|
||||
PLAT_PL061_MAX_GPIOS := 160
|
||||
$(eval $(call add_define,PLAT_PL061_MAX_GPIOS))
|
||||
|
||||
|
||||
### File : plat_macros.S [mandatory]
|
||||
|
||||
Each platform must ensure a file of this name is in the system include path with
|
||||
|
|
|
|||
|
|
@ -0,0 +1,165 @@
|
|||
/*
|
||||
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* Redistributions of source code must retain the above copyright notice, this
|
||||
* list of conditions and the following disclaimer.
|
||||
*
|
||||
* Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* Neither the name of ARM nor the names of its contributors may be used
|
||||
* to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* ARM PL061 GPIO Driver.
|
||||
* Reference to ARM DDI 0190B document.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <assert.h>
|
||||
#include <cassert.h>
|
||||
#include <debug.h>
|
||||
#include <errno.h>
|
||||
#include <gpio.h>
|
||||
#include <mmio.h>
|
||||
#include <pl061_gpio.h>
|
||||
|
||||
#if !PLAT_PL061_MAX_GPIOS
|
||||
# define PLAT_PL061_MAX_GPIOS 32
|
||||
#endif /* PLAT_PL061_MAX_GPIOS */
|
||||
|
||||
CASSERT(PLAT_PL061_MAX_GPIOS > 0, assert_plat_pl061_max_gpios);
|
||||
|
||||
#define MAX_GPIO_DEVICES ((PLAT_PL061_MAX_GPIOS + \
|
||||
(GPIOS_PER_PL061 - 1)) / GPIOS_PER_PL061)
|
||||
|
||||
#define PL061_GPIO_DIR 0x400
|
||||
|
||||
#define GPIOS_PER_PL061 8
|
||||
#define BIT(nr) (1UL << (nr))
|
||||
|
||||
static int pl061_get_direction(int gpio);
|
||||
static void pl061_set_direction(int gpio, int direction);
|
||||
static int pl061_get_value(int gpio);
|
||||
static void pl061_set_value(int gpio, int value);
|
||||
|
||||
static uintptr_t pl061_reg_base[MAX_GPIO_DEVICES];
|
||||
|
||||
static const gpio_ops_t pl061_gpio_ops = {
|
||||
.get_direction = pl061_get_direction,
|
||||
.set_direction = pl061_set_direction,
|
||||
.get_value = pl061_get_value,
|
||||
.set_value = pl061_set_value,
|
||||
};
|
||||
|
||||
static int pl061_get_direction(int gpio)
|
||||
{
|
||||
uintptr_t base_addr;
|
||||
unsigned int data, offset;
|
||||
|
||||
assert((gpio >= 0) && (gpio < PLAT_PL061_MAX_GPIOS));
|
||||
|
||||
base_addr = pl061_reg_base[gpio / GPIOS_PER_PL061];
|
||||
offset = gpio % GPIOS_PER_PL061;
|
||||
data = mmio_read_8(base_addr + PL061_GPIO_DIR);
|
||||
if (data & BIT(offset))
|
||||
return GPIO_DIR_OUT;
|
||||
return GPIO_DIR_IN;
|
||||
}
|
||||
|
||||
static void pl061_set_direction(int gpio, int direction)
|
||||
{
|
||||
uintptr_t base_addr;
|
||||
unsigned int data, offset;
|
||||
|
||||
assert((gpio >= 0) && (gpio < PLAT_PL061_MAX_GPIOS));
|
||||
|
||||
base_addr = pl061_reg_base[gpio / GPIOS_PER_PL061];
|
||||
offset = gpio % GPIOS_PER_PL061;
|
||||
if (direction == GPIO_DIR_OUT) {
|
||||
data = mmio_read_8(base_addr + PL061_GPIO_DIR) | BIT(offset);
|
||||
mmio_write_8(base_addr + PL061_GPIO_DIR, data);
|
||||
} else {
|
||||
data = mmio_read_8(base_addr + PL061_GPIO_DIR) & ~BIT(offset);
|
||||
mmio_write_8(base_addr + PL061_GPIO_DIR, data);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* The offset of GPIODATA register is 0.
|
||||
* The values read from GPIODATA are determined for each bit, by the mask bit
|
||||
* derived from the address used to access the data register, PADDR[9:2].
|
||||
* Bits that are 1 in the address mask cause the corresponding bits in GPIODATA
|
||||
* to be read, and bits that are 0 in the address mask cause the corresponding
|
||||
* bits in GPIODATA to be read as 0, regardless of their value.
|
||||
*/
|
||||
static int pl061_get_value(int gpio)
|
||||
{
|
||||
uintptr_t base_addr;
|
||||
unsigned int offset;
|
||||
|
||||
assert((gpio >= 0) && (gpio < PLAT_PL061_MAX_GPIOS));
|
||||
|
||||
base_addr = pl061_reg_base[gpio / GPIOS_PER_PL061];
|
||||
offset = gpio % GPIOS_PER_PL061;
|
||||
if (mmio_read_8(base_addr + BIT(offset + 2)))
|
||||
return GPIO_LEVEL_HIGH;
|
||||
return GPIO_LEVEL_LOW;
|
||||
}
|
||||
|
||||
/*
|
||||
* In order to write GPIODATA, the corresponding bits in the mask, resulting
|
||||
* from the address bus, PADDR[9:2], must be HIGH. Otherwise the bit values
|
||||
* remain unchanged by the write.
|
||||
*/
|
||||
static void pl061_set_value(int gpio, int value)
|
||||
{
|
||||
uintptr_t base_addr;
|
||||
int offset;
|
||||
|
||||
assert((gpio >= 0) && (gpio < PLAT_PL061_MAX_GPIOS));
|
||||
|
||||
base_addr = pl061_reg_base[gpio / GPIOS_PER_PL061];
|
||||
offset = gpio % GPIOS_PER_PL061;
|
||||
if (value == GPIO_LEVEL_HIGH)
|
||||
mmio_write_8(base_addr + BIT(offset + 2), BIT(offset));
|
||||
else
|
||||
mmio_write_8(base_addr + BIT(offset + 2), 0);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Register the PL061 GPIO controller with a base address and the offset
|
||||
* of start pin in this GPIO controller.
|
||||
* This function is called after pl061_gpio_ops_init().
|
||||
*/
|
||||
void pl061_gpio_register(uintptr_t base_addr, int gpio_dev)
|
||||
{
|
||||
assert((gpio_dev >= 0) && (gpio_dev < MAX_GPIO_DEVICES));
|
||||
|
||||
pl061_reg_base[gpio_dev] = base_addr;
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialize PL061 GPIO controller with the total GPIO numbers in SoC.
|
||||
*/
|
||||
void pl061_gpio_init(void)
|
||||
{
|
||||
gpio_init(&pl061_gpio_ops);
|
||||
}
|
||||
|
|
@ -0,0 +1,96 @@
|
|||
/*
|
||||
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* Redistributions of source code must retain the above copyright notice, this
|
||||
* list of conditions and the following disclaimer.
|
||||
*
|
||||
* Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* Neither the name of ARM nor the names of its contributors may be used
|
||||
* to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* GPIO -- General Purpose Input/Output
|
||||
*
|
||||
* Defines a simple and generic interface to access GPIO device.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <assert.h>
|
||||
#include <errno.h>
|
||||
#include <gpio.h>
|
||||
|
||||
/*
|
||||
* The gpio implementation
|
||||
*/
|
||||
static const gpio_ops_t *ops;
|
||||
|
||||
int gpio_get_direction(int gpio)
|
||||
{
|
||||
assert(ops);
|
||||
assert(ops->get_direction != 0);
|
||||
assert(gpio >= 0);
|
||||
|
||||
return ops->get_direction(gpio);
|
||||
}
|
||||
|
||||
void gpio_set_direction(int gpio, int direction)
|
||||
{
|
||||
assert(ops);
|
||||
assert(ops->set_direction != 0);
|
||||
assert((direction == GPIO_DIR_OUT) || (direction == GPIO_DIR_IN));
|
||||
assert(gpio >= 0);
|
||||
|
||||
ops->set_direction(gpio, direction);
|
||||
}
|
||||
|
||||
int gpio_get_value(int gpio)
|
||||
{
|
||||
assert(ops);
|
||||
assert(ops->get_value != 0);
|
||||
assert(gpio >= 0);
|
||||
|
||||
return ops->get_value(gpio);
|
||||
}
|
||||
|
||||
void gpio_set_value(int gpio, int value)
|
||||
{
|
||||
assert(ops);
|
||||
assert(ops->set_value != 0);
|
||||
assert((value == GPIO_LEVEL_LOW) || (value == GPIO_LEVEL_HIGH));
|
||||
assert(gpio >= 0);
|
||||
|
||||
ops->set_value(gpio, value);
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialize the gpio. The fields in the provided gpio
|
||||
* ops pointer must be valid.
|
||||
*/
|
||||
void gpio_init(const gpio_ops_t *ops_ptr)
|
||||
{
|
||||
assert(ops_ptr != 0 &&
|
||||
(ops_ptr->get_direction != 0) &&
|
||||
(ops_ptr->set_direction != 0) &&
|
||||
(ops_ptr->get_value != 0) &&
|
||||
(ops_ptr->set_value != 0));
|
||||
|
||||
ops = ops_ptr;
|
||||
}
|
||||
|
|
@ -0,0 +1,39 @@
|
|||
/*
|
||||
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* Redistributions of source code must retain the above copyright notice, this
|
||||
* list of conditions and the following disclaimer.
|
||||
*
|
||||
* Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* Neither the name of ARM nor the names of its contributors may be used
|
||||
* to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#ifndef __PL061_GPIO_H__
|
||||
#define __PL061_GPIO_H__
|
||||
|
||||
#include <gpio.h>
|
||||
|
||||
void pl061_gpio_register(uintptr_t base_addr, int gpio_dev);
|
||||
void pl061_gpio_init(void);
|
||||
|
||||
#endif /* __PL061_GPIO_H__ */
|
||||
|
|
@ -0,0 +1,53 @@
|
|||
/*
|
||||
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* Redistributions of source code must retain the above copyright notice, this
|
||||
* list of conditions and the following disclaimer.
|
||||
*
|
||||
* Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* Neither the name of ARM nor the names of its contributors may be used
|
||||
* to endorse or promote products derived from this software without specific
|
||||
* prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#ifndef __GPIO_H__
|
||||
#define __GPIO_H__
|
||||
|
||||
#define GPIO_DIR_OUT 0
|
||||
#define GPIO_DIR_IN 1
|
||||
|
||||
#define GPIO_LEVEL_LOW 0
|
||||
#define GPIO_LEVEL_HIGH 1
|
||||
|
||||
typedef struct gpio_ops {
|
||||
int (*get_direction)(int gpio);
|
||||
void (*set_direction)(int gpio, int direction);
|
||||
int (*get_value)(int gpio);
|
||||
void (*set_value)(int gpio, int value);
|
||||
} gpio_ops_t;
|
||||
|
||||
int gpio_get_direction(int gpio);
|
||||
void gpio_set_direction(int gpio, int direction);
|
||||
int gpio_get_value(int gpio);
|
||||
void gpio_set_value(int gpio, int value);
|
||||
void gpio_init(const gpio_ops_t *ops);
|
||||
|
||||
#endif /* __GPIO_H__ */
|
||||
Loading…
Reference in New Issue