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authorSascha Hauer <s.hauer@pengutronix.de>2018-02-08 09:04:21 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2018-02-08 09:04:21 +0100
commit6f826bfe45298721a92bbe93d32a6a0eb76d46ee (patch)
tree167158fd037c76aff6a5ff76862aab9996521c97 /drivers
parenta830047442883e130b39b620168c16e0495420db (diff)
parent643ea6eb95dce1818cc10e6def4d97597d8912d9 (diff)
downloadbarebox-6f826bfe45298721a92bbe93d32a6a0eb76d46ee.tar.gz
barebox-6f826bfe45298721a92bbe93d32a6a0eb76d46ee.tar.xz
Merge branch 'for-next/sandbox-libftdi'
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpio/Kconfig4
-rw-r--r--drivers/gpio/Makefile1
-rw-r--r--drivers/gpio/gpio-libftdi1.c137
3 files changed, 142 insertions, 0 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 434c5688b4..ed93e868ae 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -132,6 +132,10 @@ config GPIO_SX150X
Say Y here to build support for the Semtec Sx150x I2C GPIO
expander chip.
+config GPIO_LIBFTDI1
+ bool "libftdi1 driver"
+ depends on SANDBOX
+
endmenu
endif
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index f37dd08f1a..f5ed876d5e 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_GPIO_CLPS711X) += gpio-clps711x.o
obj-$(CONFIG_GPIO_DIGIC) += gpio-digic.o
obj-$(CONFIG_GPIO_GENERIC) += gpio-generic.o
obj-$(CONFIG_GPIO_IMX) += gpio-imx.o
+obj-$(CONFIG_GPIO_LIBFTDI1) += gpio-libftdi1.o
obj-$(CONFIG_GPIO_MXS) += gpio-mxs.o
obj-$(CONFIG_GPIO_JZ4740) += gpio-jz4740.o
obj-$(CONFIG_GPIO_MALTA_FPGA_I2C) += gpio-malta-fpga-i2c.o
diff --git a/drivers/gpio/gpio-libftdi1.c b/drivers/gpio/gpio-libftdi1.c
new file mode 100644
index 0000000000..cd36b08ca6
--- /dev/null
+++ b/drivers/gpio/gpio-libftdi1.c
@@ -0,0 +1,137 @@
+/*
+ * libftdi1 sandbox barebox GPIO driver
+ *
+ * Copyright (C) 2016, 2017 Antony Pavlov <antonynpavlov@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <gpio.h>
+#include <init.h>
+#include <malloc.h>
+#include <mach/linux.h>
+
+struct libftdi1_gpio_chip {
+ struct gpio_chip chip;
+ struct ft2232_bitbang *ftbb;
+};
+
+static int libftdi1_gpio_direction_input(struct gpio_chip *chip, unsigned off)
+{
+ struct libftdi1_gpio_chip *gpio =
+ container_of(chip, struct libftdi1_gpio_chip, chip);
+
+ barebox_libftdi1_gpio_direction(gpio->ftbb, off, GPIOF_DIR_IN);
+ barebox_libftdi1_update(gpio->ftbb);
+
+ return 0;
+}
+
+static int libftdi1_gpio_direction_output(
+ struct gpio_chip *chip, unsigned off, int value)
+{
+ struct libftdi1_gpio_chip *gpio =
+ container_of(chip, struct libftdi1_gpio_chip, chip);
+
+ barebox_libftdi1_gpio_set_value(gpio->ftbb, off, value);
+ barebox_libftdi1_gpio_direction(gpio->ftbb, off, GPIOF_DIR_OUT);
+ barebox_libftdi1_update(gpio->ftbb);
+
+ return 0;
+}
+
+static int libftdi1_gpio_get_value(struct gpio_chip *chip, unsigned off)
+{
+ struct libftdi1_gpio_chip *gpio =
+ container_of(chip, struct libftdi1_gpio_chip, chip);
+
+ return barebox_libftdi1_gpio_get_value(gpio->ftbb, off);
+}
+
+static void libftdi1_gpio_set_value(
+ struct gpio_chip *chip, unsigned off, int value)
+{
+ struct libftdi1_gpio_chip *gpio =
+ container_of(chip, struct libftdi1_gpio_chip, chip);
+
+ barebox_libftdi1_gpio_set_value(gpio->ftbb, off, value);
+ barebox_libftdi1_update(gpio->ftbb);
+}
+
+static struct gpio_ops libftdi1_gpio_ops = {
+ .direction_input = libftdi1_gpio_direction_input,
+ .direction_output = libftdi1_gpio_direction_output,
+ .get = libftdi1_gpio_get_value,
+ .set = libftdi1_gpio_set_value,
+};
+
+static int libftdi1_gpio_probe(struct device_d *dev)
+{
+ struct libftdi1_gpio_chip *gpio;
+ struct ft2232_bitbang *ftbb;
+ int ret;
+ uint32_t id_vendor, id_product;
+ const char *i_serial_number = NULL;
+
+ of_property_read_u32(dev->device_node, "usb,id_vendor",
+ &id_vendor);
+
+ of_property_read_u32(dev->device_node, "usb,id_product",
+ &id_product);
+
+ of_property_read_string(dev->device_node, "usb,i_serial_number",
+ &i_serial_number);
+
+ ftbb = barebox_libftdi1_open(id_vendor, id_product,
+ i_serial_number);
+ if (!ftbb)
+ return -EIO;
+
+ gpio = xzalloc(sizeof(*gpio));
+
+ gpio->ftbb = ftbb;
+
+ gpio->chip.dev = dev;
+ gpio->chip.ops = &libftdi1_gpio_ops;
+ gpio->chip.base = 0;
+ gpio->chip.ngpio = 8;
+
+ ret = gpiochip_add(&gpio->chip);
+
+ dev_dbg(dev, "%d: probed gpio%d with base %d\n",
+ ret, dev->id, gpio->chip.base);
+
+ return 0;
+}
+
+static __maybe_unused const struct of_device_id libftdi1_gpio_dt_ids[] = {
+ {
+ .compatible = "barebox,libftdi1-gpio",
+ }, {
+ /* sentinel */
+ },
+};
+
+static void libftdi1_gpio_remove(struct device_d *dev)
+{
+ barebox_libftdi1_close();
+}
+
+static struct driver_d libftdi1_gpio_driver = {
+ .name = "libftdi1-gpio",
+ .probe = libftdi1_gpio_probe,
+ .remove = libftdi1_gpio_remove,
+ .of_compatible = DRV_OF_COMPAT(libftdi1_gpio_dt_ids),
+};
+device_platform_driver(libftdi1_gpio_driver);