maa: add support for enabling pins and pulldowns

* Not Complete

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>

api/maa/common.h

@@ -108,15 +108,23 @@ typedef struct {
     /*@}*/
 } maa_mux_t;
 
-/**
+typedef struct {
- * A Strucutre representing a singular I/O pin. i.e GPIO/PWM
+    maa_boolean_t complex_pin:1;
- */
+    maa_boolean_t output_en:1;
+    maa_boolean_t output_en_high:1;
+    maa_boolean_t pullup_en:1;
+    maa_boolean_t pullup_en_hiz:1;
+} maa_pin_cap_complex_t;
+
 typedef struct {
     /*@{*/
     unsigned int pinmap; /**< sysfs pin */
     unsigned int parent_id; /** parent chip id */
     unsigned int mux_total; /** Numfer of muxes needed for operation of pin */
     maa_mux_t mux[6]; /** Array holding information about mux */
+    unsigned int output_enable; /** Output Enable GPIO, for level shifting */
+    unsigned int pullup_enable; /** Pull-Up enable GPIO, inputs */
+    maa_pin_cap_complex_t complex_cap;
     /*@}*/
 } maa_pin_t;
 

include/maa_internal.h

@@ -69,3 +69,10 @@ maa_pin_t* maa_setup_pwm(int pin);
  * @return maa_mmap_pin_t
  */
 maa_mmap_pin_t* maa_setup_mmap_gpio(int pin);
+
+/** Swap Directional mode.
+ *
+ * @param pin physical pin to operate on
+ * @return out direction to setup. 1 for output 0 for input
+ */
+maa_result_t maa_swap_complex_gpio(int pin, int out);

src/gpio/gpio.c

@@ -368,9 +368,11 @@ maa_gpio_dir(maa_gpio_context dev, gpio_dir_t dir)
 
     char bu[MAX_SIZE];
     int length;
+    int out_switch = 0;
     switch(dir) {
         case MAA_GPIO_OUT:
             length = snprintf(bu, sizeof(bu), "out");
+            out_switch = 1;
             break;
         case MAA_GPIO_IN:
             length = snprintf(bu, sizeof(bu), "in");
@@ -380,6 +382,12 @@ maa_gpio_dir(maa_gpio_context dev, gpio_dir_t dir)
             return MAA_ERROR_FEATURE_NOT_IMPLEMENTED;
     }
 
+    if (dev->phy_pin >= 0) {
+        maa_result_t swap_res = maa_swap_complex_gpio(dev->phy_pin, out_switch);
+        if (swap_res != MAA_SUCCESS)
+            return swap_res;
+    }
+
     if (write(direction, bu, length*sizeof(char)) == -1) {
         fprintf(stderr, "Failed to write to direction\n");
         close(direction);

src/maa.c

@@ -36,6 +36,7 @@
 
 //static maa_pininfo_t* pindata;
 static maa_board_t* plat = NULL;
+static maa_platform_t platform_type = 99;
 
 const char *
 maa_get_version()
@@ -63,7 +64,7 @@ maa_init()
     Py_InitializeEx(0);
     PyEval_InitThreads();
 #endif
-    maa_platform_t platform_type = MAA_UNKNOWN_PLATFORM;
+    platform_type = MAA_UNKNOWN_PLATFORM;
 
     // detect a galileo gen2 board
     char *line = NULL;
@@ -375,3 +376,44 @@ maa_setup_mmap_gpio(int pin)
     maa_mmap_pin_t *ret = &(plat->pins[pin].mmap);
     return ret;
 }
+
+maa_result_t
+maa_swap_complex_gpio(int pin, int out)
+{
+    if (plat == NULL)
+        return MAA_ERROR_INVALID_PLATFORM;
+
+    printf("SWAP CALLED on %i with bool as %i", pin,out);
+
+    switch (platform_type) {
+        case MAA_INTEL_GALILEO_GEN2:
+            printf("Intel Galileo Gen 2\n");
+            if (plat->pins[pin].gpio.complex_cap.complex_pin != 1)
+                return MAA_SUCCESS;
+            if (plat->pins[pin].gpio.complex_cap.output_en == 1) {
+                maa_gpio_context output_e;
+                printf("Doing stuff here with %i", plat->pins[pin].gpio.output_enable);
+                output_e = maa_gpio_init_raw(plat->pins[pin].gpio.output_enable);
+                if (maa_gpio_dir(output_e, MAA_GPIO_OUT) != MAA_SUCCESS)
+                    return MAA_ERROR_INVALID_RESOURCE;
+                int output_val;
+                if (plat->pins[pin].gpio.complex_cap.output_en_high == 1)
+                    output_val = out;
+                else
+                    if (out == 1)
+                        output_val = 0;
+                    else
+                        output_val = 1;
+                if (maa_gpio_write(output_e, output_val) != MAA_SUCCESS)
+                    return MAA_ERROR_INVALID_RESOURCE;
+            }
+            //if (plat->pins[pin].gpio.complex_cap.pullup_en == 1) {
+            //    maa_gpio_context pullup_e;
+            //    pullup_e = maa_gpio_init_raw(plat->pins[pin].gpio.pullup_enable);
+            //    if (maa_gpio_mode(pullup_e, MAA_GPIO_HIZ) != MAA_SUCCESS)
+            //        return MAA_ERROR_INVALID_RESOURCE;
+            //}
+            break;
+        default: return MAA_SUCCESS;
+    }
+}