From: 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/Kconfig                 |  1 +
 hw/arm/stm32l4x5_soc.c         | 65 ++++++++++++++++++++++++++++++++--
 include/hw/arm/stm32l4x5_soc.h |  3 ++
 3 files changed, 67 insertions(+), 2 deletions(-)

diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index b95576fb0c..28d378ed83 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -458,6 +458,7 @@ config STM32L4X5_SOC
     bool
     select ARM_V7M
     select OR_IRQ
+    select STM32L4X5_EXTI
 
 config XLNX_ZYNQMP_ARM
     bool
diff --git a/hw/arm/stm32l4x5_soc.c b/hw/arm/stm32l4x5_soc.c
index f476878b2c..cf786eac1d 100644
--- a/hw/arm/stm32l4x5_soc.c
+++ b/hw/arm/stm32l4x5_soc.c
@@ -45,10 +45,51 @@
 #define SRAM2_BASE_ADDRESS 0x10000000
 #define SRAM2_SIZE (32 * KiB)
 
+#define EXTI_ADDR 0x40010400
+
+#define NUM_EXTI_IRQ 40
+/* Match exti line connections with their CPU IRQ number */
+/* See Vector Table (Reference Manual p.396) */
+static const int exti_irq[NUM_EXTI_IRQ] = {
+    6,                      /* GPIO[0]                 */
+    7,                      /* GPIO[1]                 */
+    8,                      /* GPIO[2]                 */
+    9,                      /* GPIO[3]                 */
+    10,                     /* GPIO[4]                 */
+    23, 23, 23, 23, 23,     /* GPIO[5..9]              */
+    40, 40, 40, 40, 40, 40, /* GPIO[10..15]            */
+    1,                      /* PVD                     */
+    67,                     /* OTG_FS_WKUP, Direct     */
+    41,                     /* RTC_ALARM               */
+    2,                      /* RTC_TAMP_STAMP2/CSS_LSE */
+    3,                      /* RTC wakeup timer        */
+    63,                     /* COMP1                   */
+    63,                     /* COMP2                   */
+    31,                     /* I2C1 wakeup, Direct     */
+    33,                     /* I2C2 wakeup, Direct     */
+    72,                     /* I2C3 wakeup, Direct     */
+    37,                     /* USART1 wakeup, Direct   */
+    38,                     /* USART2 wakeup, Direct   */
+    39,                     /* USART3 wakeup, Direct   */
+    52,                     /* UART4 wakeup, Direct    */
+    53,                     /* UART4 wakeup, Direct    */
+    70,                     /* LPUART1 wakeup, Direct  */
+    65,                     /* LPTIM1, Direct          */
+    66,                     /* LPTIM2, Direct          */
+    76,                     /* SWPMI1 wakeup, Direct   */
+    1,                      /* PVM1 wakeup             */
+    1,                      /* PVM2 wakeup             */
+    1,                      /* PVM3 wakeup             */
+    1,                      /* PVM4 wakeup             */
+    78                      /* LCD wakeup, Direct      */
+};
+
 static void stm32l4x5_soc_initfn(Object *obj)
 {
     Stm32l4x5SocState *s = STM32L4X5_SOC(obj);
 
+    object_initialize_child(obj, "exti", &s->exti, TYPE_STM32L4X5_EXTI);
+
     s->sysclk = qdev_init_clock_in(DEVICE(s), "sysclk", NULL, NULL, 0);
     s->refclk = qdev_init_clock_in(DEVICE(s), "refclk", NULL, NULL, 0);
 }
@@ -59,7 +100,9 @@ static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
     Stm32l4x5SocState *s = STM32L4X5_SOC(dev_soc);
     const Stm32l4x5SocClass *sc = STM32L4X5_SOC_GET_CLASS(dev_soc);
     MemoryRegion *system_memory = get_system_memory();
-    DeviceState *armv7m;
+    DeviceState *dev, *armv7m;
+    SysBusDevice *busdev;
+    int i;
 
     /*
      * We use s->refclk internally and only define it with qdev_init_clock_in()
@@ -124,6 +167,25 @@ static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
         return;
     }
 
+    dev = DEVICE(&s->exti);
+    if (!sysbus_realize(SYS_BUS_DEVICE(&s->exti), errp)) {
+        return;
+    }
+    busdev = SYS_BUS_DEVICE(dev);
+    sysbus_mmio_map(busdev, 0, EXTI_ADDR);
+    for (i = 0; i < NUM_EXTI_IRQ; i++) {
+        /* IRQ seems not to be connected ? */
+        sysbus_connect_irq(busdev, i, qdev_get_gpio_in(armv7m, exti_irq[i]));
+    }
+
+    /*
+     * Uncomment when Syscfg is implemented
+     * for (i = 0; i < 16; i++) {
+     *     qdev_connect_gpio_out(DEVICE(&s->syscfg), i,
+     *                           qdev_get_gpio_in(dev, i));
+     * }
+     */
+
     /* APB1 BUS */
     create_unimplemented_device("TIM2",      0x40000000, 0x400);
     create_unimplemented_device("TIM3",      0x40000400, 0x400);
@@ -164,7 +226,6 @@ static void stm32l4x5_soc_realize(DeviceState *dev_soc, Error **errp)
     create_unimplemented_device("SYSCFG",    0x40010000, 0x30);
     create_unimplemented_device("VREFBUF",   0x40010030, 0x1D0);
     create_unimplemented_device("COMP",      0x40010200, 0x200);
-    create_unimplemented_device("EXTI",      0x40010400, 0x400);
     /* RESERVED:    0x40010800, 0x1400 */
     create_unimplemented_device("FIREWALL",  0x40011C00, 0x400);
     /* RESERVED:    0x40012000, 0x800 */
diff --git a/include/hw/arm/stm32l4x5_soc.h b/include/hw/arm/stm32l4x5_soc.h
index 564201fee5..ac47158596 100644
--- a/include/hw/arm/stm32l4x5_soc.h
+++ b/include/hw/arm/stm32l4x5_soc.h
@@ -37,6 +37,7 @@
 #include "qemu/units.h"
 #include "hw/qdev-core.h"
 #include "hw/arm/armv7m.h"
+#include "hw/misc/stm32l4x5_exti.h"
 #include "qom/object.h"
 
 #define TYPE_STM32L4X5_SOC "stm32l4x5-soc"
@@ -50,6 +51,8 @@ struct Stm32l4x5SocState {
 
     ARMv7MState armv7m;
 
+    Stm32l4x5ExtiState exti;
+
     MemoryRegion sram1;
     MemoryRegion sram2;
     MemoryRegion flash;
-- 
2.38.5