diff options
| -rw-r--r-- | arch/sandbox/Kconfig | 1 | ||||
| -rw-r--r-- | arch/sandbox/Makefile | 6 | ||||
| -rw-r--r-- | arch/sandbox/mach-sandbox/include/mach/linux.h | 12 | ||||
| -rw-r--r-- | arch/sandbox/os/Makefile | 3 | ||||
| -rw-r--r-- | arch/sandbox/os/ftdi.c | 154 | ||||
| -rw-r--r-- | drivers/gpio/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/gpio/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpio/gpio-libftdi1.c | 137 |
8 files changed, 317 insertions, 1 deletions
diff --git a/arch/sandbox/Kconfig b/arch/sandbox/Kconfig index 9c72673bde..3f1cefb837 100644 --- a/arch/sandbox/Kconfig +++ b/arch/sandbox/Kconfig @@ -1,6 +1,7 @@ config SANDBOX bool select OFTREE + select GPIOLIB default y config ARCH_TEXT_BASE diff --git a/arch/sandbox/Makefile b/arch/sandbox/Makefile index 9d545c3b71..85c70b5e80 100644 --- a/arch/sandbox/Makefile +++ b/arch/sandbox/Makefile @@ -41,9 +41,13 @@ ifeq ($(CONFIG_DRIVER_VIDEO_SDL),y) SDL_LIBS := $(shell pkg-config sdl --libs) endif +ifeq ($(CONFIG_GPIO_LIBFTDI1),y) +FTDI1_LIBS := $(shell pkg-config libftdi1 --libs) +endif + cmd_barebox__ = $(CC) -o $@ -Wl,-T,$(barebox-lds) \ -Wl,--start-group $(barebox-common) -Wl,--end-group \ - -lrt -lpthread $(SDL_LIBS) + -lrt -lpthread $(SDL_LIBS) $(FTDI1_LIBS) common-y += $(BOARD) arch/sandbox/os/ diff --git a/arch/sandbox/mach-sandbox/include/mach/linux.h b/arch/sandbox/mach-sandbox/include/mach/linux.h index 1327a56cab..52360f8771 100644 --- a/arch/sandbox/mach-sandbox/include/mach/linux.h +++ b/arch/sandbox/mach-sandbox/include/mach/linux.h @@ -38,4 +38,16 @@ void sdl_get_bitfield_rgba(struct fb_bitfield *r, struct fb_bitfield *g, struct fb_bitfield *b, struct fb_bitfield *a); void sdl_setpixel(int x, int y, uint8_t r, uint8_t g, uint8_t b, uint8_t a); +struct ft2232_bitbang; +struct ft2232_bitbang *barebox_libftdi1_open(int vendor_id, int device_id, + const char *serial); +void barebox_libftdi1_gpio_direction(struct ft2232_bitbang *ftbb, + unsigned off, unsigned dir); +int barebox_libftdi1_gpio_get_value(struct ft2232_bitbang *ftbb, + unsigned off); +void barebox_libftdi1_gpio_set_value(struct ft2232_bitbang *ftbb, + unsigned off, unsigned val); +int barebox_libftdi1_update(struct ft2232_bitbang *ftbb); +void barebox_libftdi1_close(void); + #endif /* __ASM_ARCH_LINUX_H */ diff --git a/arch/sandbox/os/Makefile b/arch/sandbox/os/Makefile index 537f848e06..75baa34a83 100644 --- a/arch/sandbox/os/Makefile +++ b/arch/sandbox/os/Makefile @@ -17,3 +17,6 @@ obj-y = common.o tap.o CFLAGS_sdl.o = $(shell pkg-config sdl --cflags) obj-$(CONFIG_DRIVER_VIDEO_SDL) += sdl.o + +CFLAGS_ftdi.o = $(shell pkg-config libftdi1 --cflags) +obj-$(CONFIG_GPIO_LIBFTDI1) += ftdi.o diff --git a/arch/sandbox/os/ftdi.c b/arch/sandbox/os/ftdi.c new file mode 100644 index 0000000000..6485d5cfab --- /dev/null +++ b/arch/sandbox/os/ftdi.c @@ -0,0 +1,154 @@ +/* + * sandbox barebox libftdi1 support + * + * 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 <stdio.h> +#include <ftdi.h> + +#define GPIOF_DIR_OUT (0 << 0) +#define GPIOF_DIR_IN (1 << 0) + +#define BIT(nr) (1UL << (nr)) + +struct ft2232_bitbang { + struct ftdi_context *ftdi; + uint8_t odata; + uint8_t dir; +}; + +static struct ft2232_bitbang ftbb; + +static inline int ftdi_flush(struct ftdi_context *ftdi) +{ + uint8_t buf[1]; + int ret; + + buf[0] = SEND_IMMEDIATE; + + ret = ftdi_write_data(ftdi, buf, 1); + + return ret; +} + +static int ftdi_get_high_byte_data(struct ftdi_context *ftdi, uint8_t *data) +{ + uint8_t obuf; + int ret; + + obuf = GET_BITS_HIGH; + ret = ftdi_write_data(ftdi, &obuf, 1); + + ret = ftdi_read_data(ftdi, data, 1); + + return ret; +} + +static int ftdi_set_high_byte_data_dir(struct ft2232_bitbang *ftbb) +{ + uint8_t buf[3]; + int ret; + + buf[0] = SET_BITS_HIGH; + buf[1] = ftbb->odata; + buf[2] = ftbb->dir; + + ret = ftdi_write_data(ftbb->ftdi, buf, 3); + ftdi_flush(ftbb->ftdi); + + return ret; +} + +int barebox_libftdi1_update(struct ft2232_bitbang *ftbb) +{ + return ftdi_set_high_byte_data_dir(ftbb); +} + +void barebox_libftdi1_gpio_direction(struct ft2232_bitbang *ftbb, + unsigned off, unsigned dir) +{ + switch (dir) { + case GPIOF_DIR_IN: + ftbb->dir &= ~BIT(off); + break; + case GPIOF_DIR_OUT: + ftbb->dir |= BIT(off); + break; + default: + printf("%s:%d: invalid dir argument\n", __FILE__, __LINE__); + } +} + +int barebox_libftdi1_gpio_get_value(struct ft2232_bitbang *ftbb, unsigned off) +{ + uint8_t data; + + ftdi_get_high_byte_data(ftbb->ftdi, &data); + + return !!(data & BIT(off)); +} + +void barebox_libftdi1_gpio_set_value(struct ft2232_bitbang *ftbb, + unsigned off, unsigned val) +{ + if (val) + ftbb->odata |= BIT(off); + else + ftbb->odata &= ~BIT(off); +} + +struct ft2232_bitbang *barebox_libftdi1_open(int id_vendor, int id_product, + const char *serial) +{ + struct ftdi_context *ftdi; + int ret; + + ftdi = ftdi_new(); + if (!ftdi) { + fprintf(stderr, "ftdi_new failed\n"); + goto error; + } + + ret = ftdi_usb_open_desc(ftdi, id_vendor, id_product, NULL, serial); + if (ret < 0 && ret != -5) { + fprintf(stderr, "unable to open ftdi device: %d (%s)\n", + ret, ftdi_get_error_string(ftdi)); + goto error; + } + + ftdi_set_interface(ftdi, INTERFACE_A); + ftdi_set_bitmode(ftdi, 0x00, BITMODE_MPSSE); + + ftbb.ftdi = ftdi; + + /* reset pins to default neutral state */ + ftbb.dir = 0; + ftbb.odata = 0; + ftdi_set_high_byte_data_dir(&ftbb); + + return &ftbb; + +error: + return NULL; +} + +void barebox_libftdi1_close(void) +{ + struct ftdi_context *ftdi = ftbb.ftdi; + + ftdi_set_interface(ftdi, INTERFACE_ANY); + ftdi_usb_close(ftdi); + ftdi_free(ftdi); +} 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); |