*/
#include "qemu/osdep.h"
+#include "hw/irq.h"
#include "hw/timer/imx_gpt.h"
-#include "hw/misc/imx_ccm.h"
-#include "qemu/main-loop.h"
+#include "migration/vmstate.h"
+#include "qemu/module.h"
#include "qemu/log.h"
#ifndef DEBUG_IMX_GPT
} \
} while (0)
-static char const *imx_gpt_reg_name(uint32_t reg)
+static const char *imx_gpt_reg_name(uint32_t reg)
{
switch (reg) {
case 0:
}
};
-static const IMXClk imx_gpt_clocks[] = {
+static const IMXClk imx25_gpt_clocks[] = {
+ CLK_NONE, /* 000 No clock source */
+ CLK_IPG, /* 001 ipg_clk, 532MHz*/
+ CLK_IPG_HIGH, /* 010 ipg_clk_highfreq */
+ CLK_NONE, /* 011 not defined */
+ CLK_32k, /* 100 ipg_clk_32k */
+ CLK_32k, /* 101 ipg_clk_32k */
+ CLK_32k, /* 110 ipg_clk_32k */
+ CLK_32k, /* 111 ipg_clk_32k */
+};
+
+static const IMXClk imx31_gpt_clocks[] = {
CLK_NONE, /* 000 No clock source */
CLK_IPG, /* 001 ipg_clk, 532MHz*/
CLK_IPG_HIGH, /* 010 ipg_clk_highfreq */
CLK_NONE, /* 111 not defined */
};
+static const IMXClk imx6_gpt_clocks[] = {
+ CLK_NONE, /* 000 No clock source */
+ CLK_IPG, /* 001 ipg_clk, 532MHz*/
+ CLK_IPG_HIGH, /* 010 ipg_clk_highfreq */
+ CLK_EXT, /* 011 External clock */
+ CLK_32k, /* 100 ipg_clk_32k */
+ CLK_HIGH_DIV, /* 101 reference clock / 8 */
+ CLK_NONE, /* 110 not defined */
+ CLK_HIGH, /* 111 reference clock */
+};
+
+static const IMXClk imx7_gpt_clocks[] = {
+ CLK_NONE, /* 000 No clock source */
+ CLK_IPG, /* 001 ipg_clk, 532MHz*/
+ CLK_IPG_HIGH, /* 010 ipg_clk_highfreq */
+ CLK_EXT, /* 011 External clock */
+ CLK_32k, /* 100 ipg_clk_32k */
+ CLK_HIGH, /* 101 reference clock */
+ CLK_NONE, /* 110 not defined */
+ CLK_NONE, /* 111 not defined */
+};
+
+/* Must be called from within ptimer_transaction_begin/commit block */
static void imx_gpt_set_freq(IMXGPTState *s)
{
uint32_t clksrc = extract32(s->cr, GPT_CR_CLKSRC_SHIFT, 3);
s->freq = imx_ccm_get_clock_frequency(s->ccm,
- imx_gpt_clocks[clksrc]) / (1 + s->pr);
+ s->clocks[clksrc]) / (1 + s->pr);
DPRINTF("Setting clksrc %d to frequency %d\n", clksrc, s->freq);
return timeout;
}
+/* Must be called from within ptimer_transaction_begin/commit block */
static void imx_gpt_compute_next_timeout(IMXGPTState *s, bool event)
{
uint32_t timeout = GPT_TIMER_MAX;
return reg_value;
}
-static void imx_gpt_reset(DeviceState *dev)
-{
- IMXGPTState *s = IMX_GPT(dev);
+static void imx_gpt_reset_common(IMXGPTState *s, bool is_soft_reset)
+{
+ ptimer_transaction_begin(s->timer);
/* stop timer */
ptimer_stop(s->timer);
- /*
- * Soft reset doesn't touch some bits; hard reset clears them
+ /* Soft reset and hard reset differ only in their handling of the CR
+ * register -- soft reset preserves the values of some bits there.
*/
- s->cr &= ~(GPT_CR_EN|GPT_CR_ENMOD|GPT_CR_STOPEN|GPT_CR_DOZEN|
- GPT_CR_WAITEN|GPT_CR_DBGEN);
+ if (is_soft_reset) {
+ /* Clear all CR bits except those that are preserved by soft reset. */
+ s->cr &= GPT_CR_EN | GPT_CR_ENMOD | GPT_CR_STOPEN | GPT_CR_DOZEN |
+ GPT_CR_WAITEN | GPT_CR_DBGEN |
+ (GPT_CR_CLKSRC_MASK << GPT_CR_CLKSRC_SHIFT);
+ } else {
+ s->cr = 0;
+ }
s->sr = 0;
s->pr = 0;
s->ir = 0;
if (s->freq && (s->cr & GPT_CR_EN)) {
ptimer_run(s->timer, 1);
}
+ ptimer_transaction_commit(s->timer);
+}
+
+static void imx_gpt_soft_reset(DeviceState *dev)
+{
+ IMXGPTState *s = IMX_GPT(dev);
+ imx_gpt_reset_common(s, true);
+}
+
+static void imx_gpt_reset(DeviceState *dev)
+{
+ IMXGPTState *s = IMX_GPT(dev);
+ imx_gpt_reset_common(s, false);
}
static void imx_gpt_write(void *opaque, hwaddr offset, uint64_t value,
s->cr = value & ~0x7c14;
if (s->cr & GPT_CR_SWR) { /* force reset */
/* handle the reset */
- imx_gpt_reset(DEVICE(s));
+ imx_gpt_soft_reset(DEVICE(s));
} else {
/* set our freq, as the source might have changed */
+ ptimer_transaction_begin(s->timer);
imx_gpt_set_freq(s);
if ((oldreg ^ s->cr) & GPT_CR_EN) {
ptimer_stop(s->timer);
}
}
+ ptimer_transaction_commit(s->timer);
}
break;
case 1: /* Prescaler */
s->pr = value & 0xfff;
+ ptimer_transaction_begin(s->timer);
imx_gpt_set_freq(s);
+ ptimer_transaction_commit(s->timer);
break;
case 2: /* SR */
s->ir = value & 0x3f;
imx_gpt_update_int(s);
+ ptimer_transaction_begin(s->timer);
imx_gpt_compute_next_timeout(s, false);
+ ptimer_transaction_commit(s->timer);
break;
case 4: /* OCR1 -- output compare register */
s->ocr1 = value;
+ ptimer_transaction_begin(s->timer);
/* In non-freerun mode, reset count when this register is written */
if (!(s->cr & GPT_CR_FRR)) {
s->next_timeout = GPT_TIMER_MAX;
/* compute the new timeout */
imx_gpt_compute_next_timeout(s, false);
+ ptimer_transaction_commit(s->timer);
break;
s->ocr2 = value;
/* compute the new timeout */
+ ptimer_transaction_begin(s->timer);
imx_gpt_compute_next_timeout(s, false);
+ ptimer_transaction_commit(s->timer);
break;
s->ocr3 = value;
/* compute the new timeout */
+ ptimer_transaction_begin(s->timer);
imx_gpt_compute_next_timeout(s, false);
+ ptimer_transaction_commit(s->timer);
break;
{
IMXGPTState *s = IMX_GPT(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
- QEMUBH *bh;
sysbus_init_irq(sbd, &s->irq);
memory_region_init_io(&s->iomem, OBJECT(s), &imx_gpt_ops, s, TYPE_IMX_GPT,
0x00001000);
sysbus_init_mmio(sbd, &s->iomem);
- bh = qemu_bh_new(imx_gpt_timeout, s);
- s->timer = ptimer_init(bh);
+ s->timer = ptimer_init(imx_gpt_timeout, s, PTIMER_POLICY_LEGACY);
}
static void imx_gpt_class_init(ObjectClass *klass, void *data)
dc->desc = "i.MX general timer";
}
-static const TypeInfo imx_gpt_info = {
- .name = TYPE_IMX_GPT,
+static void imx25_gpt_init(Object *obj)
+{
+ IMXGPTState *s = IMX_GPT(obj);
+
+ s->clocks = imx25_gpt_clocks;
+}
+
+static void imx31_gpt_init(Object *obj)
+{
+ IMXGPTState *s = IMX_GPT(obj);
+
+ s->clocks = imx31_gpt_clocks;
+}
+
+static void imx6_gpt_init(Object *obj)
+{
+ IMXGPTState *s = IMX_GPT(obj);
+
+ s->clocks = imx6_gpt_clocks;
+}
+
+static void imx7_gpt_init(Object *obj)
+{
+ IMXGPTState *s = IMX_GPT(obj);
+
+ s->clocks = imx7_gpt_clocks;
+}
+
+static const TypeInfo imx25_gpt_info = {
+ .name = TYPE_IMX25_GPT,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(IMXGPTState),
+ .instance_init = imx25_gpt_init,
.class_init = imx_gpt_class_init,
};
+static const TypeInfo imx31_gpt_info = {
+ .name = TYPE_IMX31_GPT,
+ .parent = TYPE_IMX25_GPT,
+ .instance_init = imx31_gpt_init,
+};
+
+static const TypeInfo imx6_gpt_info = {
+ .name = TYPE_IMX6_GPT,
+ .parent = TYPE_IMX25_GPT,
+ .instance_init = imx6_gpt_init,
+};
+
+static const TypeInfo imx7_gpt_info = {
+ .name = TYPE_IMX7_GPT,
+ .parent = TYPE_IMX25_GPT,
+ .instance_init = imx7_gpt_init,
+};
+
static void imx_gpt_register_types(void)
{
- type_register_static(&imx_gpt_info);
+ type_register_static(&imx25_gpt_info);
+ type_register_static(&imx31_gpt_info);
+ type_register_static(&imx6_gpt_info);
+ type_register_static(&imx7_gpt_info);
}
type_init(imx_gpt_register_types)
projects / mirror_qemu.git / blobdiff