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-rw-r--r--hw/sd/Kconfig4
-rw-r--r--hw/sd/cadence_sdhci.c193
-rw-r--r--hw/sd/meson.build1
-rw-r--r--include/hw/sd/cadence_sdhci.h47
4 files changed, 245 insertions, 0 deletions
diff --git a/hw/sd/Kconfig b/hw/sd/Kconfig
index c5e1e55..633b9af 100644
--- a/hw/sd/Kconfig
+++ b/hw/sd/Kconfig
@@ -19,3 +19,7 @@ config SDHCI_PCI
default y if PCI_DEVICES
depends on PCI
select SDHCI
+
+config CADENCE_SDHCI
+ bool
+ select SDHCI
diff --git a/hw/sd/cadence_sdhci.c b/hw/sd/cadence_sdhci.c
new file mode 100644
index 0000000..0b371c8
--- /dev/null
+++ b/hw/sd/cadence_sdhci.c
@@ -0,0 +1,193 @@
+/*
+ * Cadence SDHCI emulation
+ *
+ * Copyright (c) 2020 Wind River Systems, Inc.
+ *
+ * Author:
+ * Bin Meng <bin.meng@windriver.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 or
+ * (at your option) version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/bitops.h"
+#include "qemu/error-report.h"
+#include "qemu/log.h"
+#include "qapi/error.h"
+#include "migration/vmstate.h"
+#include "hw/irq.h"
+#include "hw/sd/cadence_sdhci.h"
+#include "sdhci-internal.h"
+
+/* HRS - Host Register Set (specific to Cadence) */
+
+#define CADENCE_SDHCI_HRS00 0x00 /* general information */
+#define CADENCE_SDHCI_HRS00_SWR BIT(0)
+#define CADENCE_SDHCI_HRS00_POR_VAL 0x00010000
+
+#define CADENCE_SDHCI_HRS04 0x10 /* PHY access port */
+#define CADENCE_SDHCI_HRS04_WR BIT(24)
+#define CADENCE_SDHCI_HRS04_RD BIT(25)
+#define CADENCE_SDHCI_HRS04_ACK BIT(26)
+
+#define CADENCE_SDHCI_HRS06 0x18 /* eMMC control */
+#define CADENCE_SDHCI_HRS06_TUNE_UP BIT(15)
+
+/* SRS - Slot Register Set (SDHCI-compatible) */
+
+#define CADENCE_SDHCI_SRS_BASE 0x200
+
+#define TO_REG(addr) ((addr) / sizeof(uint32_t))
+
+static void cadence_sdhci_instance_init(Object *obj)
+{
+ CadenceSDHCIState *s = CADENCE_SDHCI(obj);
+
+ object_initialize_child(OBJECT(s), "generic-sdhci",
+ &s->sdhci, TYPE_SYSBUS_SDHCI);
+}
+
+static void cadence_sdhci_reset(DeviceState *dev)
+{
+ CadenceSDHCIState *s = CADENCE_SDHCI(dev);
+
+ memset(s->regs, 0, CADENCE_SDHCI_REG_SIZE);
+ s->regs[TO_REG(CADENCE_SDHCI_HRS00)] = CADENCE_SDHCI_HRS00_POR_VAL;
+
+ device_cold_reset(DEVICE(&s->sdhci));
+}
+
+static uint64_t cadence_sdhci_read(void *opaque, hwaddr addr, unsigned int size)
+{
+ CadenceSDHCIState *s = opaque;
+ uint32_t val;
+
+ val = s->regs[TO_REG(addr)];
+
+ return (uint64_t)val;
+}
+
+static void cadence_sdhci_write(void *opaque, hwaddr addr, uint64_t val,
+ unsigned int size)
+{
+ CadenceSDHCIState *s = opaque;
+ uint32_t val32 = (uint32_t)val;
+
+ switch (addr) {
+ case CADENCE_SDHCI_HRS00:
+ /*
+ * The only writable bit is SWR (software reset) and it automatically
+ * clears to zero, so essentially this register remains unchanged.
+ */
+ if (val32 & CADENCE_SDHCI_HRS00_SWR) {
+ cadence_sdhci_reset(DEVICE(s));
+ }
+
+ break;
+ case CADENCE_SDHCI_HRS04:
+ /*
+ * Only emulate the ACK bit behavior when read or write transaction
+ * are requested.
+ */
+ if (val32 & (CADENCE_SDHCI_HRS04_WR | CADENCE_SDHCI_HRS04_RD)) {
+ val32 |= CADENCE_SDHCI_HRS04_ACK;
+ } else {
+ val32 &= ~CADENCE_SDHCI_HRS04_ACK;
+ }
+
+ s->regs[TO_REG(addr)] = val32;
+ break;
+ case CADENCE_SDHCI_HRS06:
+ if (val32 & CADENCE_SDHCI_HRS06_TUNE_UP) {
+ val32 &= ~CADENCE_SDHCI_HRS06_TUNE_UP;
+ }
+
+ s->regs[TO_REG(addr)] = val32;
+ break;
+ default:
+ s->regs[TO_REG(addr)] = val32;
+ break;
+ }
+}
+
+static const MemoryRegionOps cadence_sdhci_ops = {
+ .read = cadence_sdhci_read,
+ .write = cadence_sdhci_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .impl = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ },
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ }
+};
+
+static void cadence_sdhci_realize(DeviceState *dev, Error **errp)
+{
+ CadenceSDHCIState *s = CADENCE_SDHCI(dev);
+ SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+ SysBusDevice *sbd_sdhci = SYS_BUS_DEVICE(&s->sdhci);
+
+ memory_region_init(&s->container, OBJECT(s),
+ "cadence.sdhci-container", 0x1000);
+ sysbus_init_mmio(sbd, &s->container);
+
+ memory_region_init_io(&s->iomem, OBJECT(s), &cadence_sdhci_ops,
+ s, TYPE_CADENCE_SDHCI, CADENCE_SDHCI_REG_SIZE);
+ memory_region_add_subregion(&s->container, 0, &s->iomem);
+
+ sysbus_realize(sbd_sdhci, errp);
+ memory_region_add_subregion(&s->container, CADENCE_SDHCI_SRS_BASE,
+ sysbus_mmio_get_region(sbd_sdhci, 0));
+
+ /* propagate irq and "sd-bus" from generic-sdhci */
+ sysbus_pass_irq(sbd, sbd_sdhci);
+ s->bus = qdev_get_child_bus(DEVICE(sbd_sdhci), "sd-bus");
+}
+
+static const VMStateDescription vmstate_cadence_sdhci = {
+ .name = TYPE_CADENCE_SDHCI,
+ .version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32_ARRAY(regs, CadenceSDHCIState, CADENCE_SDHCI_NUM_REGS),
+ VMSTATE_END_OF_LIST(),
+ },
+};
+
+static void cadence_sdhci_class_init(ObjectClass *classp, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(classp);
+
+ dc->desc = "Cadence SD/SDIO/eMMC Host Controller (SD4HC)";
+ dc->realize = cadence_sdhci_realize;
+ dc->reset = cadence_sdhci_reset;
+ dc->vmsd = &vmstate_cadence_sdhci;
+}
+
+static TypeInfo cadence_sdhci_info = {
+ .name = TYPE_CADENCE_SDHCI,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(CadenceSDHCIState),
+ .instance_init = cadence_sdhci_instance_init,
+ .class_init = cadence_sdhci_class_init,
+};
+
+static void cadence_sdhci_register_types(void)
+{
+ type_register_static(&cadence_sdhci_info);
+}
+
+type_init(cadence_sdhci_register_types)
diff --git a/hw/sd/meson.build b/hw/sd/meson.build
index b43e59b..9c29691 100644
--- a/hw/sd/meson.build
+++ b/hw/sd/meson.build
@@ -10,3 +10,4 @@ softmmu_ss.add(when: 'CONFIG_PXA2XX', if_true: files('pxa2xx_mmci.c'))
softmmu_ss.add(when: 'CONFIG_RASPI', if_true: files('bcm2835_sdhost.c'))
softmmu_ss.add(when: 'CONFIG_ASPEED_SOC', if_true: files('aspeed_sdhci.c'))
softmmu_ss.add(when: 'CONFIG_ALLWINNER_H3', if_true: files('allwinner-sdhost.c'))
+softmmu_ss.add(when: 'CONFIG_CADENCE_SDHCI', if_true: files('cadence_sdhci.c'))
diff --git a/include/hw/sd/cadence_sdhci.h b/include/hw/sd/cadence_sdhci.h
new file mode 100644
index 0000000..cd8288b
--- /dev/null
+++ b/include/hw/sd/cadence_sdhci.h
@@ -0,0 +1,47 @@
+/*
+ * Cadence SDHCI emulation
+ *
+ * Copyright (c) 2020 Wind River Systems, Inc.
+ *
+ * Author:
+ * Bin Meng <bin.meng@windriver.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 or
+ * (at your option) version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef CADENCE_SDHCI_H
+#define CADENCE_SDHCI_H
+
+#include "hw/sd/sdhci.h"
+
+#define CADENCE_SDHCI_REG_SIZE 0x100
+#define CADENCE_SDHCI_NUM_REGS (CADENCE_SDHCI_REG_SIZE / sizeof(uint32_t))
+
+typedef struct CadenceSDHCIState {
+ SysBusDevice parent;
+
+ MemoryRegion container;
+ MemoryRegion iomem;
+ BusState *bus;
+
+ uint32_t regs[CADENCE_SDHCI_NUM_REGS];
+
+ SDHCIState sdhci;
+} CadenceSDHCIState;
+
+#define TYPE_CADENCE_SDHCI "cadence.sdhci"
+#define CADENCE_SDHCI(obj) OBJECT_CHECK(CadenceSDHCIState, (obj), \
+ TYPE_CADENCE_SDHCI)
+
+#endif /* CADENCE_SDHCI_H */
generated by cgit v1.1 at 2024-11-03 10:09:33 +0000