[PATCH v2 4/5] hw/arm : Connect DM163 to B-L475E-IOT01A

["Inès Varhol" <ines.varhol@telecom-paris.fr>]

Signed-off-by: Arnaud Minier <arnaud.minier@telecom-paris.fr>
Signed-off-by: Inès Varhol <ines.varhol@telecom-paris.fr>
---
 hw/arm/b-l475e-iot01a.c | 59 +++++++++++++++++++++++++++++++++++++++--
 hw/arm/Kconfig          |  1 +
 2 files changed, 58 insertions(+), 2 deletions(-)

diff --git a/hw/arm/b-l475e-iot01a.c b/hw/arm/b-l475e-iot01a.c
index 2b570b3e09..6f0bf68ca6 100644
--- a/hw/arm/b-l475e-iot01a.c
+++ b/hw/arm/b-l475e-iot01a.c
@@ -27,10 +27,37 @@
 #include "hw/boards.h"
 #include "hw/qdev-properties.h"
 #include "qemu/error-report.h"
-#include "hw/arm/stm32l4x5_soc.h"
 #include "hw/arm/boot.h"
+#include "hw/core/split-irq.h"
+#include "hw/arm/stm32l4x5_soc.h"
+#include "hw/gpio/stm32l4x5_gpio.h"
+#include "hw/display/dm163.h"
+
+/* B-L475E-IOT01A implementation is inspired from netduinoplus2 and arduino */
 
-/* B-L475E-IOT01A implementation is derived from netduinoplus2 */
+/*
+ * There are actually 14 input pins in the DM163 device.
+ * Here the DM163 input pin EN isn't connected to the STM32L4x5
+ * GPIOs as the IM120417002 colors shield doesn't actually use
+ * this pin to drive the RGB matrix.
+ */
+#define NUM_DM163_INPUTS 13
+
+static const int dm163_input[NUM_DM163_INPUTS] = {
+    1 * GPIO_NUM_PINS + 2,  /* ROW0  PB2       */
+    0 * GPIO_NUM_PINS + 15, /* ROW1  PA15      */
+    0 * GPIO_NUM_PINS + 2,  /* ROW2  PA2       */
+    0 * GPIO_NUM_PINS + 7,  /* ROW3  PA7       */
+    0 * GPIO_NUM_PINS + 6,  /* ROW4  PA6       */
+    0 * GPIO_NUM_PINS + 5,  /* ROW5  PA5       */
+    1 * GPIO_NUM_PINS + 0,  /* ROW6  PB0       */
+    0 * GPIO_NUM_PINS + 3,  /* ROW7  PA3       */
+    0 * GPIO_NUM_PINS + 4,  /* SIN (SDA) PA4   */
+    1 * GPIO_NUM_PINS + 1,  /* DCK (SCK) PB1   */
+    2 * GPIO_NUM_PINS + 3,  /* RST_B (RST) PC3 */
+    2 * GPIO_NUM_PINS + 4,  /* LAT_B (LAT) PC4 */
+    2 * GPIO_NUM_PINS + 5,  /* SELBK (SB)  PC5 */
+};
 
 #define TYPE_B_L475E_IOT01A MACHINE_TYPE_NAME("b-l475e-iot01a")
 OBJECT_DECLARE_SIMPLE_TYPE(Bl475eMachineState, B_L475E_IOT01A)
@@ -39,12 +66,16 @@ typedef struct Bl475eMachineState {
     MachineState parent_obj;
 
     Stm32l4x5SocState soc;
+    SplitIRQ gpio_splitters[NUM_DM163_INPUTS];
+    DM163State dm163;
 } Bl475eMachineState;
 
 static void bl475e_init(MachineState *machine)
 {
     Bl475eMachineState *s = B_L475E_IOT01A(machine);
     const Stm32l4x5SocClass *sc;
+    DeviceState *dev, *gpio_out_splitter;
+    int gpio, pin;
 
     object_initialize_child(OBJECT(machine), "soc", &s->soc,
                             TYPE_STM32L4X5XG_SOC);
@@ -53,6 +84,30 @@ static void bl475e_init(MachineState *machine)
     sc = STM32L4X5_SOC_GET_CLASS(&s->soc);
     armv7m_load_kernel(ARM_CPU(first_cpu),
         machine->kernel_filename, 0, sc->flash_size);
+
+    if (object_class_by_name("dm163")) {
+        object_initialize_child(OBJECT(machine), "dm163",
+                                &s->dm163, TYPE_DM163);
+        dev = DEVICE(&s->dm163);
+        qdev_realize(dev, NULL, &error_abort);
+
+        for (unsigned i = 0; i < NUM_DM163_INPUTS; i++) {
+            object_initialize_child(OBJECT(machine), "gpio-out-splitters[*]",
+                                    &s->gpio_splitters[i], TYPE_SPLIT_IRQ);
+            gpio_out_splitter = DEVICE(&s->gpio_splitters[i]);
+            qdev_prop_set_uint32(gpio_out_splitter, "num-lines", 2);
+            qdev_realize(gpio_out_splitter, NULL, &error_fatal);
+
+            qdev_connect_gpio_out(gpio_out_splitter, 0,
+                qdev_get_gpio_in(DEVICE(&s->soc), dm163_input[i]));
+            qdev_connect_gpio_out(gpio_out_splitter, 1,
+                qdev_get_gpio_in(dev, i));
+            gpio = dm163_input[i] / GPIO_NUM_PINS;
+            pin = dm163_input[i] % GPIO_NUM_PINS;
+            qdev_connect_gpio_out(DEVICE(&s->soc.gpio[gpio]), pin,
+                qdev_get_gpio_in(DEVICE(gpio_out_splitter), 0));
+        }
+    }
 }
 
 static void bl475e_machine_init(ObjectClass *oc, void *data)
diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index 5776dbb19f..6c05bac99b 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -458,6 +458,7 @@ config B_L475E_IOT01A
     default y
     depends on TCG && ARM
     select STM32L4X5_SOC
+    imply DM163
 
 config STM32L4X5_SOC
     bool
-- 
2.43.2