diff mbox series

[v3,23/33] next-cube: use named gpio to read RTC data bit in scr2

Message ID 20241222130012.1013374-24-mark.cave-ayland@ilande.co.uk (mailing list archive)
State New
Headers show
Series next-cube: more tidy-ups and improvements | expand

Commit Message

Mark Cave-Ayland Dec. 22, 2024, 1 p.m. UTC 
This is in preparation for moving NeXTRTC to its own separate device.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Thomas Huth <huth@tuxfamily.org>
---
 hw/m68k/next-cube.c | 169 ++++++++++++++++++++++++--------------------
 1 file changed, 92 insertions(+), 77 deletions(-)
diff mbox series

Patch

diff --git a/hw/m68k/next-cube.c b/hw/m68k/next-cube.c
index bc3afa7d54..53acf0a1c7 100644
--- a/hw/m68k/next-cube.c
+++ b/hw/m68k/next-cube.c
@@ -171,6 +171,90 @@  static bool next_rtc_cmd_is_write(uint8_t cmd)
            (cmd == 0xb1);
 }
 
+static void next_rtc_data_in_irq(void *opaque, int n, int level)
+{
+    NeXTPC *s = NEXT_PC(opaque);
+    NeXTRTC *rtc = &s->rtc;
+
+    if (rtc->phase < 8) {
+        rtc->command = (rtc->command << 1) | level;
+
+        if (rtc->phase == 7 && !next_rtc_cmd_is_write(rtc->command)) {
+            if (rtc->command <= 0x1f) {
+                /* RAM registers */
+                rtc->retval = rtc->ram[rtc->command];
+            }
+            if ((rtc->command >= 0x20) && (rtc->command <= 0x2f)) {
+                /* RTC */
+                time_t time_h = time(NULL);
+                struct tm *info = localtime(&time_h);
+                rtc->retval = 0;
+
+                switch (rtc->command) {
+                case 0x20:
+                    rtc->retval = SCR2_TOBCD(info->tm_sec);
+                    break;
+                case 0x21:
+                    rtc->retval = SCR2_TOBCD(info->tm_min);
+                    break;
+                case 0x22:
+                    rtc->retval = SCR2_TOBCD(info->tm_hour);
+                    break;
+                case 0x24:
+                    rtc->retval = SCR2_TOBCD(info->tm_mday);
+                    break;
+                case 0x25:
+                    rtc->retval = SCR2_TOBCD((info->tm_mon + 1));
+                    break;
+                case 0x26:
+                    rtc->retval = SCR2_TOBCD((info->tm_year - 100));
+                    break;
+                }
+            }
+            if (rtc->command == 0x30) {
+                /* read the status 0x30 */
+                rtc->retval = rtc->status;
+            }
+            if (rtc->command == 0x31) {
+                /* read the control 0x31 */
+                rtc->retval = rtc->control;
+            }
+        }
+    }
+    if (rtc->phase >= 8 && rtc->phase < 16) {
+        if (next_rtc_cmd_is_write(rtc->command)) {
+            /* Shift in value to write */
+            rtc->value = (rtc->value << 1) | level;
+        } else {
+            /* Shift out value to read */
+            qemu_irq rtc_data_in_irq = qdev_get_gpio_in_named(
+                DEVICE(s), "pc-rtc-data-in", 0);
+
+            if (rtc->retval & (0x80 >> (rtc->phase - 8))) {
+                qemu_irq_raise(rtc_data_in_irq);
+            } else {
+                qemu_irq_lower(rtc_data_in_irq);
+            }
+        }
+    }
+
+    rtc->phase++;
+    if (rtc->phase == 16 && next_rtc_cmd_is_write(rtc->command)) {
+        if (rtc->command >= 0x80 && rtc->command <= 0x9f) {
+            /* RAM registers */
+            rtc->ram[rtc->command - 0x80] = rtc->value;
+        }
+        if (rtc->command == 0xb1) {
+            /* write to 0x30 register */
+            if (rtc->value & 0x04) {
+                /* clear FTU */
+                rtc->status = rtc->status & (~0x18);
+                qemu_irq_lower(s->rtc_power_irq);
+            }
+        }
+    }
+}
+
 static void next_scr2_rtc_update(NeXTPC *s)
 {
     uint8_t old_scr2, scr2_2;
@@ -187,84 +271,13 @@  static void next_scr2_rtc_update(NeXTPC *s)
         /* If we are in going down clock... do something */
         if (((old_scr2 & SCR2_RTCLK) != (scr2_2 & SCR2_RTCLK)) &&
                 ((scr2_2 & SCR2_RTCLK) == 0)) {
-            if (rtc->phase < 8) {
-                rtc->command = (rtc->command << 1) |
-                               ((scr2_2 & SCR2_RTDATA) ? 1 : 0);
-
-                if (rtc->phase == 7 && !next_rtc_cmd_is_write(rtc->command)) {
-                    if (rtc->command <= 0x1f) {
-                        /* RAM registers */
-                        rtc->retval = rtc->ram[rtc->command];
-                    }
-                    if ((rtc->command >= 0x20) && (rtc->command <= 0x2F)) {
-                        /* RTC */
-                        time_t time_h = time(NULL);
-                        struct tm *info = localtime(&time_h);
-                        rtc->retval = 0;
-
-                        switch (rtc->command) {
-                        case 0x20:
-                            rtc->retval = SCR2_TOBCD(info->tm_sec);
-                            break;
-                        case 0x21:
-                            rtc->retval = SCR2_TOBCD(info->tm_min);
-                            break;
-                        case 0x22:
-                            rtc->retval = SCR2_TOBCD(info->tm_hour);
-                            break;
-                        case 0x24:
-                            rtc->retval = SCR2_TOBCD(info->tm_mday);
-                            break;
-                        case 0x25:
-                            rtc->retval = SCR2_TOBCD((info->tm_mon + 1));
-                            break;
-                        case 0x26:
-                            rtc->retval = SCR2_TOBCD((info->tm_year - 100));
-                            break;
-                        }
-                    }
-                    if (rtc->command == 0x30) {
-                        /* read the status 0x30 */
-                        rtc->retval = rtc->status;
-                    }
-                    if (rtc->command == 0x31) {
-                        /* read the control 0x31 */
-                        rtc->retval = rtc->control;
-                    }
-                }
-            }
-            if (rtc->phase >= 8 && rtc->phase < 16) {
-                if (next_rtc_cmd_is_write(rtc->command)) {
-                    /* Shift in value to write */
-                    rtc->value = (rtc->value << 1) |
-                                 ((scr2_2 & SCR2_RTDATA) ? 1 : 0);
-                } else {
-                    /* Shift out value to read */
-                    qemu_irq rtc_data_in_irq = qdev_get_gpio_in_named(
-                        DEVICE(s), "pc-rtc-data-in", 0);
-
-                    if (rtc->retval & (0x80 >> (rtc->phase - 8))) {
-                        qemu_irq_raise(rtc_data_in_irq);
-                    } else {
-                        qemu_irq_lower(rtc_data_in_irq);
-                    }
-                }
-            }
+            qemu_irq rtc_data_in_irq = qdev_get_gpio_in_named(
+                DEVICE(s), "rtc-data-in", 0);
 
-            rtc->phase++;
-            if (rtc->phase == 16 && next_rtc_cmd_is_write(rtc->command)) {
-                if (rtc->command >= 0x80 && rtc->command <= 0x9f) {
-                    /* RAM registers */
-                    rtc->ram[rtc->command - 0x80] = rtc->value;
-                }
-                if (rtc->command == 0xb1) {
-                    /* write to 0x30 register */
-                    if (rtc->value & 0x04) {
-                        /* clear FTU */
-                        rtc->status = rtc->status & (~0x18);
-                        qemu_irq_lower(s->rtc_power_irq);
-                    }
-                }
+            if (scr2_2 & SCR2_RTDATA) {
+                qemu_irq_raise(rtc_data_in_irq);
+            } else {
+                qemu_irq_lower(rtc_data_in_irq);
             }
         }
     } else {
@@ -1104,6 +1117,8 @@  static void next_pc_init(Object *obj)
     s->rtc_power_irq = qdev_get_gpio_in(DEVICE(obj), NEXT_PWR_I);
     qdev_init_gpio_in_named(DEVICE(obj), next_pc_rtc_data_in_irq,
                             "pc-rtc-data-in", 1);
+    qdev_init_gpio_in_named(DEVICE(obj), next_rtc_data_in_irq,
+                            "rtc-data-in", 1);
 }
 
 /*