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usb: Added gpio isr support to ft4222

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Signed-off-by: Henry Bruce <henry.bruce@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Henry Bruce
2015-07-27 11:09:10 -07:00
committed by Brendan Le Foll
parent 001e291d63
commit 453eefc56a
3 changed files with 43 additions and 8 deletions
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42
src/usb/ftdi_ft4222.c
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@@ -24,6 +24,8 @@
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include "linux/i2c-dev.h"
#include "common.h"
#include "ftd2xx.h"
@@ -37,6 +39,8 @@
static FT_HANDLE ftHandle = (FT_HANDLE)NULL;
static int bus_speed = 400;
static int numI2cGpioExapnderPins = 8;
static int numUsbGpio = 0;
mraa_result_t
@@ -362,13 +366,13 @@ mraa_ftdi_ft4222_gpio_init_internal_replace(int pin)
static mraa_result_t
mraa_ftdi_ft4222_gpio_mode_replace(mraa_gpio_context dev, mraa_gpio_mode_t mode)
{
return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
return MRAA_SUCCESS;
}
static mraa_result_t
mraa_ftdi_ft4222_gpio_edge_mode_replace(mraa_gpio_context dev, mraa_gpio_edge_t mode)
{
return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
return MRAA_SUCCESS;
}
static int
@@ -409,11 +413,38 @@ mraa_ftdi_ft4222_gpio_dir_replace(mraa_gpio_context dev, mraa_gpio_dir_t dir)
return mraa_ftdi_ft4222_gpio_write_replace(dev, 1);
case MRAA_GPIO_OUT_LOW:
return mraa_ftdi_ft4222_gpio_write_replace(dev, 0);
default:
return MRAA_SUCCESS;
default:;
}
return MRAA_SUCCESS;
}
void mraa_ftdi_ft4222_sleep_ms(unsigned long mseconds)
{
struct timespec sleepTime;
sleepTime.tv_sec = mseconds / 1000; // Number of seconds
sleepTime.tv_nsec = ( mseconds % 1000 ) * 1000000; // Convert fractional seconds to nanoseconds
// Iterate nanosleep in a loop until the total sleep time is the original
// value of the seconds parameter
while ( ( nanosleep( &sleepTime, &sleepTime ) != 0 ) && ( errno == EINTR ) );
}
static void*
mraa_ftdi_ft4222_gpio_interrupt_handler_replace(mraa_gpio_context dev)
{
int prev_level = mraa_ftdi_ft4222_gpio_read_replace(dev);
while (1) {
int level = mraa_ftdi_ft4222_gpio_read_replace(dev);
if (level != prev_level) {
dev->isr(dev->isr_args);
prev_level = level;
}
// printf("mraa_ftdi_ft4222_gpio_interrupt_handler_replace\n");
mraa_ftdi_ft4222_sleep_ms(100);
}
return NULL;
}
static void
mraa_ftdi_ft4222_populate_i2c_func_table(mraa_adv_func_t* func_table)
@@ -442,6 +473,7 @@ mraa_ftdi_ft4222_populate_gpio_func_table(mraa_adv_func_t* func_table)
func_table->gpio_dir_replace = &mraa_ftdi_ft4222_gpio_dir_replace;
func_table->gpio_read_replace = &mraa_ftdi_ft4222_gpio_read_replace;
func_table->gpio_write_replace = &mraa_ftdi_ft4222_gpio_write_replace;
func_table->gpio_interrupt_handler_replace = &mraa_ftdi_ft4222_gpio_interrupt_handler_replace;
}
@@ -453,7 +485,7 @@ mraa_ftdi_ft4222()
return NULL;
mraa_boolean_t haveGpio = mraa_ftdi_ft4222_detect_io_expander();
int pinIndex = 0;
int numUsbGpio = haveGpio ? 8 : 0;
numUsbGpio = haveGpio ? numI2cGpioExapnderPins : 0;
int numUsbPins = numUsbGpio + 2; // Add SDA and SCL
sub_plat->platform_name = PLATFORM_NAME;
sub_plat->phy_pin_count = numUsbPins;