i.MX: Split the CCM class into an abstract base class and a concrete class
The IMX_CCM class is now the base abstract class that is used by EPIT
and GPT timer implementation.
IMX31_CCM class is the concrete class implementing CCM for i.MX31 SOC.
For now the i.MX25 continues to use the i.MX31 CCM implementation.
An i.MX25 specific CCM will be introduced in a later patch.
We also rework initialization to stop using deprecated sysbus device init.
Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net>
Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Message-id: fd3c7f87b50f5ebc99ec91f01413db35017f116d.1449528242.git.jcd@tribudubois.net
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/hw/misc/imx31_ccm.c b/hw/misc/imx31_ccm.c
new file mode 100644
index 0000000..b92d2e0
--- /dev/null
+++ b/hw/misc/imx31_ccm.c
@@ -0,0 +1,392 @@
+/*
+ * IMX31 Clock Control Module
+ *
+ * Copyright (C) 2012 NICTA
+ * Updated by Jean-Christophe Dubois <jcd@tribudubois.net>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ * To get the timer frequencies right, we need to emulate at least part of
+ * the i.MX31 CCM.
+ */
+
+#include "hw/misc/imx31_ccm.h"
+
+#define CKIH_FREQ 26000000 /* 26MHz crystal input */
+
+#ifndef DEBUG_IMX31_CCM
+#define DEBUG_IMX31_CCM 0
+#endif
+
+#define DPRINTF(fmt, args...) \
+ do { \
+ if (DEBUG_IMX31_CCM) { \
+ fprintf(stderr, "[%s]%s: " fmt , TYPE_IMX31_CCM, \
+ __func__, ##args); \
+ } \
+ } while (0)
+
+static char const *imx31_ccm_reg_name(uint32_t reg)
+{
+ switch (reg) {
+ case 0:
+ return "CCMR";
+ case 1:
+ return "PDR0";
+ case 2:
+ return "PDR1";
+ case 3:
+ return "RCSR";
+ case 4:
+ return "MPCTL";
+ case 5:
+ return "UPCTL";
+ case 6:
+ return "SPCTL";
+ case 7:
+ return "COSR";
+ case 8:
+ return "CGR0";
+ case 9:
+ return "CGR1";
+ case 10:
+ return "CGR2";
+ case 11:
+ return "WIMR";
+ case 12:
+ return "LDC";
+ case 13:
+ return "DCVR0";
+ case 14:
+ return "DCVR1";
+ case 15:
+ return "DCVR2";
+ case 16:
+ return "DCVR3";
+ case 17:
+ return "LTR0";
+ case 18:
+ return "LTR1";
+ case 19:
+ return "LTR2";
+ case 20:
+ return "LTR3";
+ case 21:
+ return "LTBR0";
+ case 22:
+ return "LTBR1";
+ case 23:
+ return "PMCR0";
+ case 24:
+ return "PMCR1";
+ case 25:
+ return "PDR2";
+ default:
+ return "???";
+ }
+}
+
+static const VMStateDescription vmstate_imx31_ccm = {
+ .name = TYPE_IMX31_CCM,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(ccmr, IMX31CCMState),
+ VMSTATE_UINT32(pdr0, IMX31CCMState),
+ VMSTATE_UINT32(pdr1, IMX31CCMState),
+ VMSTATE_UINT32(mpctl, IMX31CCMState),
+ VMSTATE_UINT32(spctl, IMX31CCMState),
+ VMSTATE_UINT32_ARRAY(cgr, IMX31CCMState, 3),
+ VMSTATE_UINT32(pmcr0, IMX31CCMState),
+ VMSTATE_UINT32(pmcr1, IMX31CCMState),
+ VMSTATE_END_OF_LIST()
+ },
+};
+
+static uint32_t imx31_ccm_get_pll_ref_clk(IMXCCMState *dev)
+{
+ uint32_t freq = 0;
+ IMX31CCMState *s = IMX31_CCM(dev);
+
+ if ((s->ccmr & CCMR_PRCS) == 2) {
+ if (s->ccmr & CCMR_FPME) {
+ freq = CKIL_FREQ;
+ if (s->ccmr & CCMR_FPMF) {
+ freq *= 1024;
+ }
+ }
+ } else {
+ freq = CKIH_FREQ;
+ }
+
+ DPRINTF("freq = %d\n", freq);
+
+ return freq;
+}
+
+static uint32_t imx31_ccm_get_mpll_clk(IMXCCMState *dev)
+{
+ uint32_t freq;
+ IMX31CCMState *s = IMX31_CCM(dev);
+
+ freq = imx_ccm_calc_pll(s->mpctl, imx31_ccm_get_pll_ref_clk(dev));
+
+ DPRINTF("freq = %d\n", freq);
+
+ return freq;
+}
+
+static uint32_t imx31_ccm_get_mcu_main_clk(IMXCCMState *dev)
+{
+ uint32_t freq;
+ IMX31CCMState *s = IMX31_CCM(dev);
+
+ if ((s->ccmr & CCMR_MDS) || !(s->ccmr & CCMR_MPE)) {
+ freq = imx31_ccm_get_pll_ref_clk(dev);
+ } else {
+ freq = imx31_ccm_get_mpll_clk(dev);
+ }
+
+ DPRINTF("freq = %d\n", freq);
+
+ return freq;
+}
+
+static uint32_t imx31_ccm_get_mcu_clk(IMXCCMState *dev)
+{
+ uint32_t freq;
+ IMX31CCMState *s = IMX31_CCM(dev);
+
+ freq = imx31_ccm_get_mcu_main_clk(dev) / (1 + EXTRACT(s->pdr0, MCU));
+
+ DPRINTF("freq = %d\n", freq);
+
+ return freq;
+}
+
+static uint32_t imx31_ccm_get_hsp_clk(IMXCCMState *dev)
+{
+ uint32_t freq;
+ IMX31CCMState *s = IMX31_CCM(dev);
+
+ freq = imx31_ccm_get_mcu_main_clk(dev) / (1 + EXTRACT(s->pdr0, HSP));
+
+ DPRINTF("freq = %d\n", freq);
+
+ return freq;
+}
+
+static uint32_t imx31_ccm_get_hclk_clk(IMXCCMState *dev)
+{
+ uint32_t freq;
+ IMX31CCMState *s = IMX31_CCM(dev);
+
+ freq = imx31_ccm_get_mcu_main_clk(dev) / (1 + EXTRACT(s->pdr0, MAX));
+
+ DPRINTF("freq = %d\n", freq);
+
+ return freq;
+}
+
+static uint32_t imx31_ccm_get_ipg_clk(IMXCCMState *dev)
+{
+ uint32_t freq;
+ IMX31CCMState *s = IMX31_CCM(dev);
+
+ freq = imx31_ccm_get_hclk_clk(dev) / (1 + EXTRACT(s->pdr0, IPG));
+
+ DPRINTF("freq = %d\n", freq);
+
+ return freq;
+}
+
+static uint32_t imx31_ccm_get_clock_frequency(IMXCCMState *dev, IMXClk clock)
+{
+ uint32_t freq = 0;
+
+ switch (clock) {
+ case NOCLK:
+ break;
+ case CLK_MCU:
+ freq = imx31_ccm_get_mcu_clk(dev);
+ break;
+ case CLK_HSP:
+ freq = imx31_ccm_get_hsp_clk(dev);
+ break;
+ case CLK_IPG:
+ freq = imx31_ccm_get_ipg_clk(dev);
+ break;
+ case CLK_32k:
+ freq = CKIL_FREQ;
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: unsupported clock %d\n",
+ TYPE_IMX31_CCM, __func__, clock);
+ break;
+ }
+
+ DPRINTF("Clock = %d) = %d\n", clock, freq);
+
+ return freq;
+}
+
+static void imx31_ccm_reset(DeviceState *dev)
+{
+ IMX31CCMState *s = IMX31_CCM(dev);
+
+ DPRINTF("()\n");
+
+ s->ccmr = 0x074b0b7d;
+ s->pdr0 = 0xff870b48;
+ s->pdr1 = 0x49fcfe7f;
+ s->mpctl = 0x04001800;
+ s->cgr[0] = s->cgr[1] = s->cgr[2] = 0xffffffff;
+ s->spctl = 0x04043001;
+ s->pmcr0 = 0x80209828;
+ s->pmcr1 = 0x00aa0000;
+}
+
+static uint64_t imx31_ccm_read(void *opaque, hwaddr offset, unsigned size)
+{
+ uint32 value = 0;
+ IMX31CCMState *s = (IMX31CCMState *)opaque;
+
+ switch (offset >> 2) {
+ case 0: /* CCMR */
+ value = s->ccmr;
+ break;
+ case 1:
+ value = s->pdr0;
+ break;
+ case 2:
+ value = s->pdr1;
+ break;
+ case 4:
+ value = s->mpctl;
+ break;
+ case 6:
+ value = s->spctl;
+ break;
+ case 8:
+ value = s->cgr[0];
+ break;
+ case 9:
+ value = s->cgr[1];
+ break;
+ case 10:
+ value = s->cgr[2];
+ break;
+ case 18: /* LTR1 */
+ value = 0x00004040;
+ break;
+ case 23:
+ value = s->pmcr0;
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Bad register at offset 0x%"
+ HWADDR_PRIx "\n", TYPE_IMX31_CCM, __func__, offset);
+ break;
+ }
+
+ DPRINTF("reg[%s] => 0x%" PRIx32 "\n", imx31_ccm_reg_name(offset >> 2),
+ value);
+
+ return (uint64_t)value;
+}
+
+static void imx31_ccm_write(void *opaque, hwaddr offset, uint64_t value,
+ unsigned size)
+{
+ IMX31CCMState *s = (IMX31CCMState *)opaque;
+
+ DPRINTF("reg[%s] <= 0x%" PRIx32 "\n", imx31_ccm_reg_name(offset >> 2),
+ (uint32_t)value);
+
+ switch (offset >> 2) {
+ case 0:
+ s->ccmr = CCMR_FPMF | (value & 0x3b6fdfff);
+ break;
+ case 1:
+ s->pdr0 = value & 0xff9f3fff;
+ break;
+ case 2:
+ s->pdr1 = value;
+ break;
+ case 4:
+ s->mpctl = value & 0xbfff3fff;
+ break;
+ case 6:
+ s->spctl = value & 0xbfff3fff;
+ break;
+ case 8:
+ s->cgr[0] = value;
+ break;
+ case 9:
+ s->cgr[1] = value;
+ break;
+ case 10:
+ s->cgr[2] = value;
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Bad register at offset 0x%"
+ HWADDR_PRIx "\n", TYPE_IMX31_CCM, __func__, offset);
+ break;
+ }
+}
+
+static const struct MemoryRegionOps imx31_ccm_ops = {
+ .read = imx31_ccm_read,
+ .write = imx31_ccm_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .valid = {
+ /*
+ * Our device would not work correctly if the guest was doing
+ * unaligned access. This might not be a limitation on the real
+ * device but in practice there is no reason for a guest to access
+ * this device unaligned.
+ */
+ .min_access_size = 4,
+ .max_access_size = 4,
+ .unaligned = false,
+ },
+
+};
+
+static void imx31_ccm_init(Object *obj)
+{
+ DeviceState *dev = DEVICE(obj);
+ SysBusDevice *sd = SYS_BUS_DEVICE(obj);
+ IMX31CCMState *s = IMX31_CCM(obj);
+
+ memory_region_init_io(&s->iomem, OBJECT(dev), &imx31_ccm_ops, s,
+ TYPE_IMX31_CCM, 0x1000);
+ sysbus_init_mmio(sd, &s->iomem);
+}
+
+static void imx31_ccm_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ IMXCCMClass *ccm = IMX_CCM_CLASS(klass);
+
+ dc->reset = imx31_ccm_reset;
+ dc->vmsd = &vmstate_imx31_ccm;
+ dc->desc = "i.MX31 Clock Control Module";
+
+ ccm->get_clock_frequency = imx31_ccm_get_clock_frequency;
+}
+
+static const TypeInfo imx31_ccm_info = {
+ .name = TYPE_IMX31_CCM,
+ .parent = TYPE_IMX_CCM,
+ .instance_size = sizeof(IMX31CCMState),
+ .instance_init = imx31_ccm_init,
+ .class_init = imx31_ccm_class_init,
+};
+
+static void imx31_ccm_register_types(void)
+{
+ type_register_static(&imx31_ccm_info);
+}
+
+type_init(imx31_ccm_register_types)
