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-rw-r--r--hw/imx_timer.c689
1 files changed, 0 insertions, 689 deletions
diff --git a/hw/imx_timer.c b/hw/imx_timer.c
deleted file mode 100644
index a8c311141e..0000000000
--- a/hw/imx_timer.c
+++ /dev/null
@@ -1,689 +0,0 @@
-/*
- * IMX31 Timer
- *
- * Copyright (c) 2008 OK Labs
- * Copyright (c) 2011 NICTA Pty Ltd
- * Originally written by Hans Jiang
- * Updated by Peter Chubb
- *
- * This code is licensed under GPL version 2 or later. See
- * the COPYING file in the top-level directory.
- *
- */
-
-#include "hw/hw.h"
-#include "qemu/timer.h"
-#include "hw/ptimer.h"
-#include "hw/sysbus.h"
-#include "hw/imx.h"
-
-//#define DEBUG_TIMER 1
-#ifdef DEBUG_TIMER
-# define DPRINTF(fmt, args...) \
- do { printf("imx_timer: " fmt , ##args); } while (0)
-#else
-# define DPRINTF(fmt, args...) do {} while (0)
-#endif
-
-/*
- * Define to 1 for messages about attempts to
- * access unimplemented registers or similar.
- */
-#define DEBUG_IMPLEMENTATION 1
-#if DEBUG_IMPLEMENTATION
-# define IPRINTF(fmt, args...) \
- do { fprintf(stderr, "imx_timer: " fmt, ##args); } while (0)
-#else
-# define IPRINTF(fmt, args...) do {} while (0)
-#endif
-
-/*
- * GPT : General purpose timer
- *
- * This timer counts up continuously while it is enabled, resetting itself
- * to 0 when it reaches TIMER_MAX (in freerun mode) or when it
- * reaches the value of ocr1 (in periodic mode). WE simulate this using a
- * QEMU ptimer counting down from ocr1 and reloading from ocr1 in
- * periodic mode, or counting from ocr1 to zero, then TIMER_MAX - ocr1.
- * waiting_rov is set when counting from TIMER_MAX.
- *
- * In the real hardware, there are three comparison registers that can
- * trigger interrupts, and compare channel 1 can be used to
- * force-reset the timer. However, this is a `bare-bones'
- * implementation: only what Linux 3.x uses has been implemented
- * (free-running timer from 0 to OCR1 or TIMER_MAX) .
- */
-
-
-#define TIMER_MAX 0XFFFFFFFFUL
-
-/* Control register. Not all of these bits have any effect (yet) */
-#define GPT_CR_EN (1 << 0) /* GPT Enable */
-#define GPT_CR_ENMOD (1 << 1) /* GPT Enable Mode */
-#define GPT_CR_DBGEN (1 << 2) /* GPT Debug mode enable */
-#define GPT_CR_WAITEN (1 << 3) /* GPT Wait Mode Enable */
-#define GPT_CR_DOZEN (1 << 4) /* GPT Doze mode enable */
-#define GPT_CR_STOPEN (1 << 5) /* GPT Stop Mode Enable */
-#define GPT_CR_CLKSRC_SHIFT (6)
-#define GPT_CR_CLKSRC_MASK (0x7)
-
-#define GPT_CR_FRR (1 << 9) /* Freerun or Restart */
-#define GPT_CR_SWR (1 << 15) /* Software Reset */
-#define GPT_CR_IM1 (3 << 16) /* Input capture channel 1 mode (2 bits) */
-#define GPT_CR_IM2 (3 << 18) /* Input capture channel 2 mode (2 bits) */
-#define GPT_CR_OM1 (7 << 20) /* Output Compare Channel 1 Mode (3 bits) */
-#define GPT_CR_OM2 (7 << 23) /* Output Compare Channel 2 Mode (3 bits) */
-#define GPT_CR_OM3 (7 << 26) /* Output Compare Channel 3 Mode (3 bits) */
-#define GPT_CR_FO1 (1 << 29) /* Force Output Compare Channel 1 */
-#define GPT_CR_FO2 (1 << 30) /* Force Output Compare Channel 2 */
-#define GPT_CR_FO3 (1 << 31) /* Force Output Compare Channel 3 */
-
-#define GPT_SR_OF1 (1 << 0)
-#define GPT_SR_ROV (1 << 5)
-
-#define GPT_IR_OF1IE (1 << 0)
-#define GPT_IR_ROVIE (1 << 5)
-
-typedef struct {
- SysBusDevice busdev;
- ptimer_state *timer;
- MemoryRegion iomem;
- DeviceState *ccm;
-
- uint32_t cr;
- uint32_t pr;
- uint32_t sr;
- uint32_t ir;
- uint32_t ocr1;
- uint32_t cnt;
-
- uint32_t waiting_rov;
- qemu_irq irq;
-} IMXTimerGState;
-
-static const VMStateDescription vmstate_imx_timerg = {
- .name = "imx-timerg",
- .version_id = 1,
- .minimum_version_id = 1,
- .minimum_version_id_old = 1,
- .fields = (VMStateField[]) {
- VMSTATE_UINT32(cr, IMXTimerGState),
- VMSTATE_UINT32(pr, IMXTimerGState),
- VMSTATE_UINT32(sr, IMXTimerGState),
- VMSTATE_UINT32(ir, IMXTimerGState),
- VMSTATE_UINT32(ocr1, IMXTimerGState),
- VMSTATE_UINT32(cnt, IMXTimerGState),
- VMSTATE_UINT32(waiting_rov, IMXTimerGState),
- VMSTATE_PTIMER(timer, IMXTimerGState),
- VMSTATE_END_OF_LIST()
- }
-};
-
-static const IMXClk imx_timerg_clocks[] = {
- NOCLK, /* 000 No clock source */
- IPG, /* 001 ipg_clk, 532MHz*/
- IPG, /* 010 ipg_clk_highfreq */
- NOCLK, /* 011 not defined */
- CLK_32k, /* 100 ipg_clk_32k */
- NOCLK, /* 101 not defined */
- NOCLK, /* 110 not defined */
- NOCLK, /* 111 not defined */
-};
-
-
-static void imx_timerg_set_freq(IMXTimerGState *s)
-{
- int clksrc;
- uint32_t freq;
-
- clksrc = (s->cr >> GPT_CR_CLKSRC_SHIFT) & GPT_CR_CLKSRC_MASK;
- freq = imx_clock_frequency(s->ccm, imx_timerg_clocks[clksrc]) / (1 + s->pr);
-
- DPRINTF("Setting gtimer clksrc %d to frequency %d\n", clksrc, freq);
- if (freq) {
- ptimer_set_freq(s->timer, freq);
- }
-}
-
-static void imx_timerg_update(IMXTimerGState *s)
-{
- uint32_t flags = s->sr & s->ir & (GPT_SR_OF1 | GPT_SR_ROV);
-
- DPRINTF("g-timer SR: %s %s IR=%s %s, %s\n",
- s->sr & GPT_SR_OF1 ? "OF1" : "",
- s->sr & GPT_SR_ROV ? "ROV" : "",
- s->ir & GPT_SR_OF1 ? "OF1" : "",
- s->ir & GPT_SR_ROV ? "ROV" : "",
- s->cr & GPT_CR_EN ? "CR_EN" : "Not Enabled");
-
-
- qemu_set_irq(s->irq, (s->cr & GPT_CR_EN) && flags);
-}
-
-static uint32_t imx_timerg_update_counts(IMXTimerGState *s)
-{
- uint64_t target = s->waiting_rov ? TIMER_MAX : s->ocr1;
- uint64_t cnt = ptimer_get_count(s->timer);
- s->cnt = target - cnt;
- return s->cnt;
-}
-
-static void imx_timerg_reload(IMXTimerGState *s, uint32_t timeout)
-{
- uint64_t diff_cnt;
-
- if (!(s->cr & GPT_CR_FRR)) {
- IPRINTF("IMX_timerg_reload --- called in reset-mode\n");
- return;
- }
-
- /*
- * For small timeouts, qemu sometimes runs too slow.
- * Better deliver a late interrupt than none.
- *
- * In Reset mode (FRR bit clear)
- * the ptimer reloads itself from OCR1;
- * in free-running mode we need to fake
- * running from 0 to ocr1 to TIMER_MAX
- */
- if (timeout > s->cnt) {
- diff_cnt = timeout - s->cnt;
- } else {
- diff_cnt = 0;
- }
- ptimer_set_count(s->timer, diff_cnt);
-}
-
-static uint64_t imx_timerg_read(void *opaque, hwaddr offset,
- unsigned size)
-{
- IMXTimerGState *s = (IMXTimerGState *)opaque;
-
- DPRINTF("g-read(offset=%x)", offset >> 2);
- switch (offset >> 2) {
- case 0: /* Control Register */
- DPRINTF(" cr = %x\n", s->cr);
- return s->cr;
-
- case 1: /* prescaler */
- DPRINTF(" pr = %x\n", s->pr);
- return s->pr;
-
- case 2: /* Status Register */
- DPRINTF(" sr = %x\n", s->sr);
- return s->sr;
-
- case 3: /* Interrupt Register */
- DPRINTF(" ir = %x\n", s->ir);
- return s->ir;
-
- case 4: /* Output Compare Register 1 */
- DPRINTF(" ocr1 = %x\n", s->ocr1);
- return s->ocr1;
-
-
- case 9: /* cnt */
- imx_timerg_update_counts(s);
- DPRINTF(" cnt = %x\n", s->cnt);
- return s->cnt;
- }
-
- IPRINTF("imx_timerg_read: Bad offset %x\n",
- (int)offset >> 2);
- return 0;
-}
-
-static void imx_timerg_reset(DeviceState *dev)
-{
- IMXTimerGState *s = container_of(dev, IMXTimerGState, busdev.qdev);
-
- /*
- * Soft reset doesn't touch some bits; hard reset clears them
- */
- s->cr &= ~(GPT_CR_EN|GPT_CR_DOZEN|GPT_CR_WAITEN|GPT_CR_DBGEN);
- s->sr = 0;
- s->pr = 0;
- s->ir = 0;
- s->cnt = 0;
- s->ocr1 = TIMER_MAX;
- ptimer_stop(s->timer);
- ptimer_set_limit(s->timer, TIMER_MAX, 1);
- imx_timerg_set_freq(s);
-}
-
-static void imx_timerg_write(void *opaque, hwaddr offset,
- uint64_t value, unsigned size)
-{
- IMXTimerGState *s = (IMXTimerGState *)opaque;
- DPRINTF("g-write(offset=%x, value = 0x%x)\n", (unsigned int)offset >> 2,
- (unsigned int)value);
-
- switch (offset >> 2) {
- case 0: {
- uint32_t oldcr = s->cr;
- /* CR */
- if (value & GPT_CR_SWR) { /* force reset */
- value &= ~GPT_CR_SWR;
- imx_timerg_reset(&s->busdev.qdev);
- imx_timerg_update(s);
- }
-
- s->cr = value & ~0x7c00;
- imx_timerg_set_freq(s);
- if ((oldcr ^ value) & GPT_CR_EN) {
- if (value & GPT_CR_EN) {
- if (value & GPT_CR_ENMOD) {
- ptimer_set_count(s->timer, s->ocr1);
- s->cnt = 0;
- }
- ptimer_run(s->timer,
- (value & GPT_CR_FRR) && (s->ocr1 != TIMER_MAX));
- } else {
- ptimer_stop(s->timer);
- };
- }
- return;
- }
-
- case 1: /* Prescaler */
- s->pr = value & 0xfff;
- imx_timerg_set_freq(s);
- return;
-
- case 2: /* SR */
- /*
- * No point in implementing the status register bits to do with
- * external interrupt sources.
- */
- value &= GPT_SR_OF1 | GPT_SR_ROV;
- s->sr &= ~value;
- imx_timerg_update(s);
- return;
-
- case 3: /* IR -- interrupt register */
- s->ir = value & 0x3f;
- imx_timerg_update(s);
- return;
-
- case 4: /* OCR1 -- output compare register */
- /* In non-freerun mode, reset count when this register is written */
- if (!(s->cr & GPT_CR_FRR)) {
- s->waiting_rov = 0;
- ptimer_set_limit(s->timer, value, 1);
- } else {
- imx_timerg_update_counts(s);
- if (value > s->cnt) {
- s->waiting_rov = 0;
- imx_timerg_reload(s, value);
- } else {
- s->waiting_rov = 1;
- imx_timerg_reload(s, TIMER_MAX - s->cnt);
- }
- }
- s->ocr1 = value;
- return;
-
- default:
- IPRINTF("imx_timerg_write: Bad offset %x\n",
- (int)offset >> 2);
- }
-}
-
-static void imx_timerg_timeout(void *opaque)
-{
- IMXTimerGState *s = (IMXTimerGState *)opaque;
-
- DPRINTF("imx_timerg_timeout, waiting rov=%d\n", s->waiting_rov);
- if (s->cr & GPT_CR_FRR) {
- /*
- * Free running timer from 0 -> TIMERMAX
- * Generates interrupt at TIMER_MAX and at cnt==ocr1
- * If ocr1 == TIMER_MAX, then no need to reload timer.
- */
- if (s->ocr1 == TIMER_MAX) {
- DPRINTF("s->ocr1 == TIMER_MAX, FRR\n");
- s->sr |= GPT_SR_OF1 | GPT_SR_ROV;
- imx_timerg_update(s);
- return;
- }
-
- if (s->waiting_rov) {
- /*
- * We were waiting for cnt==TIMER_MAX
- */
- s->sr |= GPT_SR_ROV;
- s->waiting_rov = 0;
- s->cnt = 0;
- imx_timerg_reload(s, s->ocr1);
- } else {
- /* Must have got a cnt==ocr1 timeout. */
- s->sr |= GPT_SR_OF1;
- s->cnt = s->ocr1;
- s->waiting_rov = 1;
- imx_timerg_reload(s, TIMER_MAX);
- }
- imx_timerg_update(s);
- return;
- }
-
- s->sr |= GPT_SR_OF1;
- imx_timerg_update(s);
-}
-
-static const MemoryRegionOps imx_timerg_ops = {
- .read = imx_timerg_read,
- .write = imx_timerg_write,
- .endianness = DEVICE_NATIVE_ENDIAN,
-};
-
-
-static int imx_timerg_init(SysBusDevice *dev)
-{
- IMXTimerGState *s = FROM_SYSBUS(IMXTimerGState, dev);
- QEMUBH *bh;
-
- sysbus_init_irq(dev, &s->irq);
- memory_region_init_io(&s->iomem, &imx_timerg_ops,
- s, "imxg-timer",
- 0x00001000);
- sysbus_init_mmio(dev, &s->iomem);
-
- bh = qemu_bh_new(imx_timerg_timeout, s);
- s->timer = ptimer_init(bh);
-
- /* Hard reset resets extra bits in CR */
- s->cr = 0;
- return 0;
-}
-
-
-
-/*
- * EPIT: Enhanced periodic interrupt timer
- */
-
-#define CR_EN (1 << 0)
-#define CR_ENMOD (1 << 1)
-#define CR_OCIEN (1 << 2)
-#define CR_RLD (1 << 3)
-#define CR_PRESCALE_SHIFT (4)
-#define CR_PRESCALE_MASK (0xfff)
-#define CR_SWR (1 << 16)
-#define CR_IOVW (1 << 17)
-#define CR_DBGEN (1 << 18)
-#define CR_EPIT (1 << 19)
-#define CR_DOZEN (1 << 20)
-#define CR_STOPEN (1 << 21)
-#define CR_CLKSRC_SHIFT (24)
-#define CR_CLKSRC_MASK (0x3 << CR_CLKSRC_SHIFT)
-
-
-/*
- * Exact clock frequencies vary from board to board.
- * These are typical.
- */
-static const IMXClk imx_timerp_clocks[] = {
- 0, /* disabled */
- IPG, /* ipg_clk, ~532MHz */
- IPG, /* ipg_clk_highfreq */
- CLK_32k, /* ipg_clk_32k -- ~32kHz */
-};
-
-typedef struct {
- SysBusDevice busdev;
- ptimer_state *timer;
- MemoryRegion iomem;
- DeviceState *ccm;
-
- uint32_t cr;
- uint32_t lr;
- uint32_t cmp;
-
- uint32_t freq;
- int int_level;
- qemu_irq irq;
-} IMXTimerPState;
-
-/*
- * Update interrupt status
- */
-static void imx_timerp_update(IMXTimerPState *s)
-{
- if (s->int_level && (s->cr & CR_OCIEN)) {
- qemu_irq_raise(s->irq);
- } else {
- qemu_irq_lower(s->irq);
- }
-}
-
-static void imx_timerp_reset(DeviceState *dev)
-{
- IMXTimerPState *s = container_of(dev, IMXTimerPState, busdev.qdev);
-
- s->cr = 0;
- s->lr = TIMER_MAX;
- s->int_level = 0;
- s->cmp = 0;
- ptimer_stop(s->timer);
- ptimer_set_count(s->timer, TIMER_MAX);
-}
-
-static uint64_t imx_timerp_read(void *opaque, hwaddr offset,
- unsigned size)
-{
- IMXTimerPState *s = (IMXTimerPState *)opaque;
-
- DPRINTF("p-read(offset=%x)", offset >> 2);
- switch (offset >> 2) {
- case 0: /* Control Register */
- DPRINTF("cr %x\n", s->cr);
- return s->cr;
-
- case 1: /* Status Register */
- DPRINTF("int_level %x\n", s->int_level);
- return s->int_level;
-
- case 2: /* LR - ticks*/
- DPRINTF("lr %x\n", s->lr);
- return s->lr;
-
- case 3: /* CMP */
- DPRINTF("cmp %x\n", s->cmp);
- return s->cmp;
-
- case 4: /* CNT */
- return ptimer_get_count(s->timer);
- }
- IPRINTF("imx_timerp_read: Bad offset %x\n",
- (int)offset >> 2);
- return 0;
-}
-
-static void set_timerp_freq(IMXTimerPState *s)
-{
- int clksrc;
- unsigned prescaler;
- uint32_t freq;
-
- clksrc = (s->cr & CR_CLKSRC_MASK) >> CR_CLKSRC_SHIFT;
- prescaler = 1 + ((s->cr >> CR_PRESCALE_SHIFT) & CR_PRESCALE_MASK);
- freq = imx_clock_frequency(s->ccm, imx_timerp_clocks[clksrc]) / prescaler;
-
- s->freq = freq;
- DPRINTF("Setting ptimer frequency to %u\n", freq);
-
- if (freq) {
- ptimer_set_freq(s->timer, freq);
- }
-}
-
-static void imx_timerp_write(void *opaque, hwaddr offset,
- uint64_t value, unsigned size)
-{
- IMXTimerPState *s = (IMXTimerPState *)opaque;
- DPRINTF("p-write(offset=%x, value = %x)\n", (unsigned int)offset >> 2,
- (unsigned int)value);
-
- switch (offset >> 2) {
- case 0: /* CR */
- if (value & CR_SWR) {
- imx_timerp_reset(&s->busdev.qdev);
- value &= ~CR_SWR;
- }
- s->cr = value & 0x03ffffff;
- set_timerp_freq(s);
-
- if (s->freq && (s->cr & CR_EN)) {
- if (!(s->cr & CR_ENMOD)) {
- ptimer_set_count(s->timer, s->lr);
- }
- ptimer_run(s->timer, 0);
- } else {
- ptimer_stop(s->timer);
- }
- break;
-
- case 1: /* SR - ACK*/
- s->int_level = 0;
- imx_timerp_update(s);
- break;
-
- case 2: /* LR - set ticks */
- s->lr = value;
- ptimer_set_limit(s->timer, value, !!(s->cr & CR_IOVW));
- break;
-
- case 3: /* CMP */
- s->cmp = value;
- if (value) {
- IPRINTF(
- "Values for EPIT comparison other than zero not supported\n"
- );
- }
- break;
-
- default:
- IPRINTF("imx_timerp_write: Bad offset %x\n",
- (int)offset >> 2);
- }
-}
-
-static void imx_timerp_tick(void *opaque)
-{
- IMXTimerPState *s = (IMXTimerPState *)opaque;
-
- DPRINTF("imxp tick\n");
- if (!(s->cr & CR_RLD)) {
- ptimer_set_count(s->timer, TIMER_MAX);
- }
- s->int_level = 1;
- imx_timerp_update(s);
-}
-
-void imx_timerp_create(const hwaddr addr,
- qemu_irq irq,
- DeviceState *ccm)
-{
- IMXTimerPState *pp;
- DeviceState *dev;
-
- dev = sysbus_create_simple("imx_timerp", addr, irq);
- pp = container_of(dev, IMXTimerPState, busdev.qdev);
- pp->ccm = ccm;
-}
-
-static const MemoryRegionOps imx_timerp_ops = {
- .read = imx_timerp_read,
- .write = imx_timerp_write,
- .endianness = DEVICE_NATIVE_ENDIAN,
-};
-
-static const VMStateDescription vmstate_imx_timerp = {
- .name = "imx-timerp",
- .version_id = 1,
- .minimum_version_id = 1,
- .minimum_version_id_old = 1,
- .fields = (VMStateField[]) {
- VMSTATE_UINT32(cr, IMXTimerPState),
- VMSTATE_UINT32(lr, IMXTimerPState),
- VMSTATE_UINT32(cmp, IMXTimerPState),
- VMSTATE_UINT32(freq, IMXTimerPState),
- VMSTATE_INT32(int_level, IMXTimerPState),
- VMSTATE_PTIMER(timer, IMXTimerPState),
- VMSTATE_END_OF_LIST()
- }
-};
-
-static int imx_timerp_init(SysBusDevice *dev)
-{
- IMXTimerPState *s = FROM_SYSBUS(IMXTimerPState, dev);
- QEMUBH *bh;
-
- DPRINTF("imx_timerp_init\n");
-
- sysbus_init_irq(dev, &s->irq);
- memory_region_init_io(&s->iomem, &imx_timerp_ops,
- s, "imxp-timer",
- 0x00001000);
- sysbus_init_mmio(dev, &s->iomem);
-
- bh = qemu_bh_new(imx_timerp_tick, s);
- s->timer = ptimer_init(bh);
-
- return 0;
-}
-
-
-void imx_timerg_create(const hwaddr addr,
- qemu_irq irq,
- DeviceState *ccm)
-{
- IMXTimerGState *pp;
- DeviceState *dev;
-
- dev = sysbus_create_simple("imx_timerg", addr, irq);
- pp = container_of(dev, IMXTimerGState, busdev.qdev);
- pp->ccm = ccm;
-}
-
-static void imx_timerg_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
- SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
- k->init = imx_timerg_init;
- dc->vmsd = &vmstate_imx_timerg;
- dc->reset = imx_timerg_reset;
- dc->desc = "i.MX general timer";
-}
-
-static void imx_timerp_class_init(ObjectClass *klass, void *data)
-{
- DeviceClass *dc = DEVICE_CLASS(klass);
- SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
- k->init = imx_timerp_init;
- dc->vmsd = &vmstate_imx_timerp;
- dc->reset = imx_timerp_reset;
- dc->desc = "i.MX periodic timer";
-}
-
-static const TypeInfo imx_timerp_info = {
- .name = "imx_timerp",
- .parent = TYPE_SYS_BUS_DEVICE,
- .instance_size = sizeof(IMXTimerPState),
- .class_init = imx_timerp_class_init,
-};
-
-static const TypeInfo imx_timerg_info = {
- .name = "imx_timerg",
- .parent = TYPE_SYS_BUS_DEVICE,
- .instance_size = sizeof(IMXTimerGState),
- .class_init = imx_timerg_class_init,
-};
-
-static void imx_timer_register_types(void)
-{
- type_register_static(&imx_timerp_info);
- type_register_static(&imx_timerg_info);
-}
-
-type_init(imx_timer_register_types)