hw/input/stellaris_gamepad: Remove StellarisGamepadButton struct

Currently for each button on the device we have a
StellarisGamepadButton struct which has the irq, keycode and pressed
state for it.  When we convert to qdev, the qdev property and GPIO
APIs are going to require that we have separate arrays for the irqs
and keycodes.  Convert from array-of-structs to three separate arrays
in preparation.

This is a migration compatibility break for the stellaris boards
(lm3s6965evb, lm3s811evb).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20231030114802.3671871-5-peter.maydell@linaro.org
--
v1=>v2: mention migration compat break in commit message;
  bump version fields in vmstate

diff --git a/hw/input/stellaris_gamepad.c b/hw/input/stellaris_gamepad.c
index 377101a4035824d0fa7bec410598e0e79d2f1616..82ddc47a26d75e6a014c4247f2910ff0f0723aa5 100644 (file)
--- a/hw/input/stellaris_gamepad.c
+++ b/hw/input/stellaris_gamepad.c
@@ -14,15 +14,11 @@
 #include "ui/console.h"
 
 typedef struct {
-    qemu_irq irq;
-    int keycode;
-    uint8_t pressed;
-} StellarisGamepadButton;
-
-typedef struct {
-    StellarisGamepadButton *buttons;
-    int num_buttons;
+    uint32_t num_buttons;
     int extension;
+    qemu_irq *irqs;
+    uint32_t *keycodes;
+    uint8_t *pressed;
 } StellarisGamepad;
 
 static void stellaris_gamepad_put_key(void * opaque, int keycode)
@@ -40,36 +36,23 @@ static void stellaris_gamepad_put_key(void * opaque, int keycode)
     keycode = (keycode & 0x7f) | s->extension;
 
     for (i = 0; i < s->num_buttons; i++) {
-        if (s->buttons[i].keycode == keycode
-                && s->buttons[i].pressed != down) {
-            s->buttons[i].pressed = down;
-            qemu_set_irq(s->buttons[i].irq, down);
+        if (s->keycodes[i] == keycode && s->pressed[i] != down) {
+            s->pressed[i] = down;
+            qemu_set_irq(s->irqs[i], down);
         }
     }
 
     s->extension = 0;
 }
 
-static const VMStateDescription vmstate_stellaris_button = {
-    .name = "stellaris_button",
-    .version_id = 0,
-    .minimum_version_id = 0,
-    .fields = (VMStateField[]) {
-        VMSTATE_UINT8(pressed, StellarisGamepadButton),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
 static const VMStateDescription vmstate_stellaris_gamepad = {
     .name = "stellaris_gamepad",
-    .version_id = 2,
-    .minimum_version_id = 2,
+    .version_id = 3,
+    .minimum_version_id = 3,
     .fields = (VMStateField[]) {
         VMSTATE_INT32(extension, StellarisGamepad),
-        VMSTATE_STRUCT_VARRAY_POINTER_INT32(buttons, StellarisGamepad,
-                                            num_buttons,
-                                            vmstate_stellaris_button,
-                                            StellarisGamepadButton),
+        VMSTATE_VARRAY_UINT32(pressed, StellarisGamepad, num_buttons,
+                              0, vmstate_info_uint8, uint8_t),
         VMSTATE_END_OF_LIST()
     }
 };
@@ -81,10 +64,12 @@ void stellaris_gamepad_init(int n, qemu_irq *irq, const int *keycode)
     int i;
 
     s = g_new0(StellarisGamepad, 1);
-    s->buttons = g_new0(StellarisGamepadButton, n);
+    s->irqs = g_new0(qemu_irq, n);
+    s->keycodes = g_new0(uint32_t, n);
+    s->pressed = g_new0(uint8_t, n);
     for (i = 0; i < n; i++) {
-        s->buttons[i].irq = irq[i];
-        s->buttons[i].keycode = keycode[i];
+        s->irqs[i] = irq[i];
+        s->keycodes[i] = keycode[i];
     }
     s->num_buttons = n;
     qemu_add_kbd_event_handler(stellaris_gamepad_put_key, s);