From: Kuo-Jung Su <dant...@faraday-tech.com>
The FTDDRII030 is a DDRII SDRAM controller which is responsible for
SDRAM initialization.
In QEMU we emualte only the SDRAM enable function.
Signed-off-by: Kuo-Jung Su <dant...@faraday-tech.com>
---
hw/arm/Makefile.objs | 1 +
hw/arm/faraday_a369_soc.c | 3 +
hw/arm/ftddrii030.c | 163 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 167 insertions(+)
create mode 100644 hw/arm/ftddrii030.c
diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
index 33c9482..2a4c7d6 100644
--- a/hw/arm/Makefile.objs
+++ b/hw/arm/Makefile.objs
@@ -39,3 +39,4 @@ obj-y += faraday_a369.o \
faraday_a369_kpd.o
obj-y += ftintc020.o
obj-y += ftahbc020.o
+obj-y += ftddrii030.o
diff --git a/hw/arm/faraday_a369_soc.c b/hw/arm/faraday_a369_soc.c
index 575d752..1021405 100644
--- a/hw/arm/faraday_a369_soc.c
+++ b/hw/arm/faraday_a369_soc.c
@@ -148,6 +148,9 @@ a369soc_device_init(FaradaySoCState *s)
/* ftahbc020 */
s->ahbc = sysbus_create_simple("ftahbc020", 0x94000000, NULL);
+
+ /* ftddrii030 */
+ s->ddrc = sysbus_create_simple("ftddrii030", 0x93100000, NULL);
}
static int a369soc_init(SysBusDevice *busdev)
diff --git a/hw/arm/ftddrii030.c b/hw/arm/ftddrii030.c
new file mode 100644
index 0000000..e56108e
--- /dev/null
+++ b/hw/arm/ftddrii030.c
@@ -0,0 +1,163 @@
+/*
+ * Faraday DDRII controller
+ *
+ * Copyright (c) 2012 Faraday Technology
+ * Written by Dante Su <dant...@faraday-tech.com>
+ *
+ * This code is licensed under GNU GPL v2+
+ */
+
+#include "hw/hw.h"
+#include "hw/sysbus.h"
+#include "hw/devices.h"
+#include "sysemu/sysemu.h"
+
+#include "faraday.h"
+
+#define REG_MCR 0x00 /* memory configuration register */
+#define REG_MSR 0x04 /* memory status register */
+#define REG_REVR 0x50 /* revision register */
+
+#define MSR_INIT_OK BIT(8) /* DDR2 initial is completed */
+#define MSR_CMD_MRS BIT(0) /* start MRS command */
+
+#define CFG_REGSIZE (0x50 / 4)
+
+#define TYPE_FTDDRII030 "ftddrii030"
+
+typedef struct Ftddrii030State {
+ SysBusDevice busdev;
+ MemoryRegion iomem;
+
+ /* HW register cache */
+ uint32_t regs[CFG_REGSIZE];
+} Ftddrii030State;
+
+#define FTDDRII030(obj) \
+ OBJECT_CHECK(Ftddrii030State, obj, TYPE_FTDDRII030)
+
+#define DDR_REG32(s, off) \
+ *(uint32_t *)((uint8_t *)(s)->regs + (off))
+
+static uint64_t
+ftddrii030_mem_read(void *opaque, hwaddr addr, unsigned size)
+{
+ Ftddrii030State *s = FTDDRII030(opaque);
+ FaradaySoCState *soc = FARADAY_SOC_GET_CORE();
+ uint64_t ret = 0;
+
+ if (soc->ddr_inited) {
+ DDR_REG32(s, REG_MSR) |= MSR_INIT_OK;
+ }
+
+ switch (addr) {
+ case REG_MCR ... 0x4c:
+ ret = s->regs[addr / 4];
+ break;
+ case REG_REVR:
+ ret = 0x100; /* rev. = 0.1.0 */
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static void
+ftddrii030_mem_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
+{
+ Ftddrii030State *s = FTDDRII030(opaque);
+ FaradaySoCState *soc = FARADAY_SOC_GET_CORE();
+
+ switch (addr) {
+ case REG_MCR:
+ DDR_REG32(s, REG_MCR) = (uint32_t)val & 0xffff;
+ break;
+ case REG_MSR:
+ val = (val & 0x3f) | (DDR_REG32(s, REG_MSR) & MSR_INIT_OK);
+ if (!soc->ddr_inited && (val & MSR_CMD_MRS)) {
+ val &= ~MSR_CMD_MRS;
+ val |= MSR_INIT_OK;
+ memory_region_add_subregion(soc->as, soc->ram_base, soc->ram);
+ soc->ddr_inited = true;
+ }
+ DDR_REG32(s, REG_MSR) = (uint32_t)val;
+ break;
+ case 0x08 ... 0x4c: /* DDRII Timing, ECC ...etc. */
+ s->regs[addr / 4] = (uint32_t)val;
+ break;
+ default:
+ break;
+ }
+}
+
+static const MemoryRegionOps ftddrii030_mem_ops = {
+ .read = ftddrii030_mem_read,
+ .write = ftddrii030_mem_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+static void ftddrii030_reset(DeviceState *ds)
+{
+ SysBusDevice *busdev = SYS_BUS_DEVICE(ds);
+ Ftddrii030State *s = FTDDRII030(FROM_SYSBUS(Ftddrii030State, busdev));
+ FaradaySoCState *soc = FARADAY_SOC_GET_CORE();
+
+ if (soc->ddr_inited && !soc->bi) {
+ memory_region_del_subregion(soc->as, soc->ram);
+ soc->ddr_inited = false;
+ }
+
+ memset(s->regs, 0, sizeof(s->regs));
+}
+
+static int ftddrii030_init(SysBusDevice *dev)
+{
+ Ftddrii030State *s = FTDDRII030(FROM_SYSBUS(Ftddrii030State, dev));
+
+ memory_region_init_io(&s->iomem,
+ &ftddrii030_mem_ops,
+ s,
+ TYPE_FTDDRII030,
+ 0x1000);
+ sysbus_init_mmio(dev, &s->iomem);
+ return 0;
+}
+
+static const VMStateDescription vmstate_ftddrii030 = {
+ .name = TYPE_FTDDRII030,
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32_ARRAY(regs, Ftddrii030State, CFG_REGSIZE),
+ VMSTATE_END_OF_LIST(),
+ }
+};
+
+static void ftddrii030_class_init(ObjectClass *klass, void *data)
+{
+ SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ k->init = ftddrii030_init;
+ dc->desc = TYPE_FTDDRII030;
+ dc->vmsd = &vmstate_ftddrii030;
+ dc->reset = ftddrii030_reset;
+ dc->no_user = 1;
+}
+
+static const TypeInfo ftddrii030_info = {
+ .name = TYPE_FTDDRII030,
+ .parent = TYPE_FARADAY_SOC,
+ .instance_size = sizeof(Ftddrii030State),
+ .class_init = ftddrii030_class_init,
+};
+
+static void ftddrii030_register_types(void)
+{
+ type_register_static(&ftddrii030_info);
+}
+
+type_init(ftddrii030_register_types)
--
1.7.9.5
