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next-cube: use named gpio to read RTC data bit in scr2

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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>
Message-ID: <20241222130012.1013374-24-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
This commit is contained in:
Mark Cave-Ayland 2024-12-22 13:00:02 +00:00 • committed by Thomas Huth
parent ccbc8fa3f9
commit 68f54f7e59
1 changed files with 92 additions and 77 deletions
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51
hw/m68k/next-cube.c
View file

@ -171,32 +171,20 @@ static bool next_rtc_cmd_is_write(uint8_t cmd)
(cmd == 0xb1); (cmd == 0xb1);
} }
static void next_scr2_rtc_update(NeXTPC *s) static void next_rtc_data_in_irq(void *opaque, int n, int level)
{ {
uint8_t old_scr2, scr2_2; NeXTPC *s = NEXT_PC(opaque);
NeXTRTC *rtc = &s->rtc; NeXTRTC *rtc = &s->rtc;
old_scr2 = extract32(s->old_scr2, 8, 8);
scr2_2 = extract32(s->scr2, 8, 8);
if (scr2_2 & 0x1) {
/* DPRINTF("RTC %x phase %i\n", scr2_2, rtc->phase); */
if (rtc->phase == -1) {
rtc->phase = 0;
}
/* 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) { if (rtc->phase < 8) {
rtc->command = (rtc->command << 1) | rtc->command = (rtc->command << 1) | level;
((scr2_2 & SCR2_RTDATA) ? 1 : 0);
if (rtc->phase == 7 && !next_rtc_cmd_is_write(rtc->command)) { if (rtc->phase == 7 && !next_rtc_cmd_is_write(rtc->command)) {
if (rtc->command <= 0x1f) { if (rtc->command <= 0x1f) {
/* RAM registers */ /* RAM registers */
rtc->retval = rtc->ram[rtc->command]; rtc->retval = rtc->ram[rtc->command];
} }
if ((rtc->command >= 0x20) && (rtc->command <= 0x2F)) { if ((rtc->command >= 0x20) && (rtc->command <= 0x2f)) {
/* RTC */ /* RTC */
time_t time_h = time(NULL); time_t time_h = time(NULL);
struct tm *info = localtime(&time_h); struct tm *info = localtime(&time_h);
@ -236,8 +224,7 @@ static void next_scr2_rtc_update(NeXTPC *s)
if (rtc->phase >= 8 && rtc->phase < 16) { if (rtc->phase >= 8 && rtc->phase < 16) {
if (next_rtc_cmd_is_write(rtc->command)) { if (next_rtc_cmd_is_write(rtc->command)) {
/* Shift in value to write */ /* Shift in value to write */
rtc->value = (rtc->value << 1) | rtc->value = (rtc->value << 1) | level;
((scr2_2 & SCR2_RTDATA) ? 1 : 0);
} else { } else {
/* Shift out value to read */ /* Shift out value to read */
qemu_irq rtc_data_in_irq = qdev_get_gpio_in_named( qemu_irq rtc_data_in_irq = qdev_get_gpio_in_named(
@ -267,6 +254,32 @@ static void next_scr2_rtc_update(NeXTPC *s)
} }
} }
} }
static void next_scr2_rtc_update(NeXTPC *s)
{
uint8_t old_scr2, scr2_2;
NeXTRTC *rtc = &s->rtc;
old_scr2 = extract32(s->old_scr2, 8, 8);
scr2_2 = extract32(s->scr2, 8, 8);
if (scr2_2 & 0x1) {
/* DPRINTF("RTC %x phase %i\n", scr2_2, rtc->phase); */
if (rtc->phase == -1) {
rtc->phase = 0;
}
/* If we are in going down clock... do something */
if (((old_scr2 & SCR2_RTCLK) != (scr2_2 & SCR2_RTCLK)) &&
((scr2_2 & SCR2_RTCLK) == 0)) {
qemu_irq rtc_data_in_irq = qdev_get_gpio_in_named(
DEVICE(s), "rtc-data-in", 0);
if (scr2_2 & SCR2_RTDATA) {
qemu_irq_raise(rtc_data_in_irq);
} else {
qemu_irq_lower(rtc_data_in_irq);
}
}
} else { } else {
/* else end or abort */ /* else end or abort */
rtc->phase = -1; rtc->phase = -1;
@ -1104,6 +1117,8 @@ static void next_pc_init(Object *obj)
s->rtc_power_irq = qdev_get_gpio_in(DEVICE(obj), NEXT_PWR_I); 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, qdev_init_gpio_in_named(DEVICE(obj), next_pc_rtc_data_in_irq,
"pc-rtc-data-in", 1); "pc-rtc-data-in", 1);
qdev_init_gpio_in_named(DEVICE(obj), next_rtc_data_in_irq,
"rtc-data-in", 1);
} }
/* /*