[PATCH 09/11] hw/sh4: sh7750 Add CPG.

[Yoshinori Sato <ysato@users.sourceforge.jp>]

CPG required new hw modules.

Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
 include/hw/sh4/sh7751-cpg.h |  94 ++++++++
 hw/sh4/sh7750.c             |  25 ++
 hw/sh4/sh7751-cpg.c         | 457 ++++++++++++++++++++++++++++++++++++
 hw/sh4/meson.build          |   1 +
 4 files changed, 577 insertions(+)
 create mode 100644 include/hw/sh4/sh7751-cpg.h
 create mode 100644 hw/sh4/sh7751-cpg.c

diff --git a/include/hw/sh4/sh7751-cpg.h b/include/hw/sh4/sh7751-cpg.h
new file mode 100644
index 0000000000..79f9abe210
--- /dev/null
+++ b/include/hw/sh4/sh7751-cpg.h
@@ -0,0 +1,94 @@
+/*
+ * SH7751(R) Clock generator circuit
+ *
+ * Datasheet: SH7751 Group, SH7751R Group User's Manual: Hardware
+ *            (Rev.4.01 R01UH0457EJ0401)
+ *
+ * Copyright (c) 2020 Yoshinori Sato
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 HW_SH4_SH7751_CPG_H
+#define HW_SH4_SH7751_CPG_H
+
+#include "hw/sysbus.h"
+#include "hw/qdev-clock.h"
+
+#define TYPE_SH7751_CPG_BASE "sh7751-cpg-base"
+#define SH7751CPGBase(obj) \
+    OBJECT_CHECK(SH7751CPGBaseState, (obj), TYPE_SH7751_CPG_BASE)
+#define TYPE_SH7751_CPG "sh7751-cpg"
+#define SH7751CPG(obj) OBJECT_CHECK(SH7751CPGState, (obj), TYPE_SH7751_CPG)
+#define TYPE_SH7751R_CPG "sh7751r-cpg"
+#define SH7751RCPG(obj) OBJECT_CHECK(SH7751RCPGState, (obj), TYPE_SH7751R_CPG)
+#define SH7751CPG_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(SH7751CPGBaseClass, obj, TYPE_SH7751_CPG_BASE)
+#define SH7751CPGBaseClass(klass) \
+    OBJECT_CLASS_CHECK(SH7751CPGBaseClass, klass, TYPE_SH7751_CPG_BASE)
+
+enum {
+    CK_DMAC,
+    CK_SCIF,
+    CK_TMU_0,
+    CK_RTC,
+    CK_SCI,
+    CK_SQ,
+    CK_UBC,
+    CK_PCIC,
+    CK_TMU_1,
+    CK_INTC,
+    NUM_SUBCLOCK,
+};
+
+typedef struct SH7751CPGBaseState {
+    SysBusDevice parent_obj;
+    uint8_t stbcr[2];
+    uint32_t clkstp00;
+    uint16_t freqcr;
+
+    uint32_t clock_mode;
+    int ick;
+    Clock *clk_ick;
+    int bck;
+    Clock *clk_bck;
+    int pck;
+    Clock *clk_pck;
+    Clock *dev_clocks[NUM_SUBCLOCK];
+    uint32_t xtal_freq_hz;
+    MemoryRegion memory[3 * 2];
+} SH7751CPGBaseState;
+
+typedef struct {
+    SH7751CPGBaseState parent_obj;
+} SH7751CPGState;
+
+typedef struct {
+    SH7751CPGBaseState parent_obj;
+} SH7751RCPGState;
+
+typedef struct {
+    SysBusDeviceClass parent;
+    int (*pll1mul)(int mode, uint16_t freqcr);
+    uint16_t *initfreqcr;
+} SH7751CPGBaseClass;
+
+typedef struct {
+    SH7751CPGBaseClass parent;
+} SH7751CPGClass;
+
+typedef struct {
+    SH7751CPGBaseClass parent;
+} SH7751RCPGClass;
+
+#endif
diff --git a/hw/sh4/sh7750.c b/hw/sh4/sh7750.c
index d53a436d8c..2f6c382aa6 100644
--- a/hw/sh4/sh7750.c
+++ b/hw/sh4/sh7750.c
@@ -24,6 +24,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qapi/error.h"
 #include "hw/irq.h"
 #include "hw/sh4/sh.h"
 #include "sysemu/sysemu.h"
@@ -32,6 +33,8 @@
 #include "hw/sh4/sh_intc.h"
 #include "hw/timer/tmu012.h"
 #include "exec/exec-all.h"
+#include "hw/sh4/sh7751-cpg.h"
+#include "hw/qdev-properties.h"
 
 #define NB_DEVICES 4
 
@@ -752,9 +755,29 @@ static const MemoryRegionOps sh7750_mmct_ops = {
     .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
+static SH7751CPGBaseState *sh_cpg_init(MemoryRegion *sysmem,
+                                      int cputype)
+{
+    const char *cpgtype;
+    SH7751CPGBaseState *cpg;
+    if (cputype & (SH_CPU_SH7750R | SH_CPU_SH7751R)) {
+        cpgtype = TYPE_SH7751R_CPG;
+    } else {
+        cpgtype = TYPE_SH7751_CPG;
+    }
+    cpg = SH7751CPGBase(qdev_new(cpgtype));
+    qdev_prop_set_uint32(DEVICE(cpg), "xtal-frequency-hz", 20 * 1000 * 1000);
+    qdev_prop_set_uint32(DEVICE(cpg), "clock-mode", 5);
+    sysbus_mmio_map(SYS_BUS_DEVICE(cpg), 0, 0x1fc00000);
+    sysbus_mmio_map(SYS_BUS_DEVICE(cpg), 1, P4ADDR(0x1fc00000));
+    sysbus_mmio_map(SYS_BUS_DEVICE(cpg), 2, A7ADDR(0x1fc00000));
+    return cpg;
+}
+
 SH7750State *sh7750_init(SuperHCPU *cpu, MemoryRegion *sysmem)
 {
     SH7750State *s;
+    SH7751CPGBaseState *cpg;
 
     s = g_malloc0(sizeof(SH7750State));
     s->cpu = cpu;
@@ -800,6 +823,7 @@ SH7750State *sh7750_init(SuperHCPU *cpu, MemoryRegion *sysmem)
 
     cpu->env.intc_handle = &s->intc;
 
+    cpg = sh_cpg_init(sysmem, cpu->env.id);
     sh_serial_init(sysmem, 0x1fe00000,
                    0, s->periph_freq, serial_hd(0),
                    s->intc.irqs[SCI1_ERI],
@@ -824,6 +848,7 @@ SH7750State *sh7750_init(SuperHCPU *cpu, MemoryRegion *sysmem)
 		s->intc.irqs[TMU2_TUNI],
 		s->intc.irqs[TMU2_TICPI]);
 
+    sysbus_realize(SYS_BUS_DEVICE(cpg), &error_abort);
     if (cpu->env.id & (SH_CPU_SH7750 | SH_CPU_SH7750S | SH_CPU_SH7751)) {
         sh_intc_register_sources(&s->intc,
 				 _INTC_ARRAY(vectors_dma4),
diff --git a/hw/sh4/sh7751-cpg.c b/hw/sh4/sh7751-cpg.c
new file mode 100644
index 0000000000..4e057908ff
--- /dev/null
+++ b/hw/sh4/sh7751-cpg.c
@@ -0,0 +1,457 @@
+/*
+ * SH7750 / SH7751 Clock Generation Circuit
+ *
+ * Datasheet: SH7751 Group, SH7751R Group User's Manual: Hardware
+ *            (Rev.4.01 R01UH0457EJ0401)
+ *
+ * Copyright (c) 2020 Yoshinori Sato
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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 "qapi/error.h"
+#include "qemu/log.h"
+#include "hw/hw.h"
+#include "hw/sh4/sh7751-cpg.h"
+#include "hw/sysbus.h"
+#include "hw/qdev-properties.h"
+#include "hw/registerfields.h"
+#include "hw/qdev-properties.h"
+#include "hw/clock.h"
+#include "migration/vmstate.h"
+
+#define SH7751_XTAL_MIN_HZ  (1 * 1000 * 1000)
+#define SH7751_XTAL_MAX_HZ (34 * 1000 * 1000)
+
+REG16(FREQCR, 0)
+  FIELD(FREQCR, PFC, 0, 3)
+  FIELD(FREQCR, BFC, 3, 3)
+  FIELD(FREQCR, IFC, 6, 3)
+  FIELD(FREQCR, PLL2EN, 9, 1)
+  FIELD(FREQCR, PLL1EN, 10, 1)
+  FIELD(FREQCR, CKOEN, 11, 1)
+REG8(STBCR, 4)
+REG8(STBCR2, 16)
+
+REG32(CLKSTP00, 0)
+REG32(CLKSTPCLR00, 8)
+
+typedef struct {
+    const char *name;
+    int devnum;
+    int reg;
+    int offset;
+} dev_clock_t;
+
+static const dev_clock_t dev_clock_list[] = {
+    { .name = "pck_sci", .devnum = CK_SCI, .reg = 0, .offset = 0},
+    { .name = "pck_rtc", .devnum = CK_RTC, .reg = 0, .offset = 1},
+    { .name = "pck_tmu-0", .devnum = CK_TMU_0, .reg = 0, .offset = 2},
+    { .name = "pck_scif",  .devnum = CK_SCIF, .reg = 0, .offset = 3},
+    { .name = "pck_dmac", .devnum = CK_DMAC, .reg = 0, .offset = 4},
+    { .name = "pck_ubc", .devnum = CK_UBC, .reg = 1, .offset = 0},
+    { .name = "pck_sq", .devnum = CK_SQ, .reg = 1, .offset = 1},
+    { .name = "pck_intc", .devnum = CK_INTC, .reg = 2, .offset = 0},
+    { .name = "pck_tmu-1", .devnum = CK_TMU_1, .reg = 2, .offset = 1},
+    { .name = "pck_pcic", .devnum = CK_PCIC, .reg = 2, .offset = 2},
+    { },
+};
+
+static void set_clock_in(SH7751CPGBaseState *cpg, const dev_clock_t *ck)
+{
+    Clock *out;
+    uint64_t period;
+
+    out = qdev_get_clock_out(DEVICE(cpg), ck->name);
+    g_assert(out);
+    period = 0;
+    switch (ck->reg) {
+    case 0:
+    case 1:
+        if (extract8(cpg->stbcr[ck->reg], ck->offset, 1) == 0) {
+            period = clock_get(cpg->clk_ick);
+        }
+        break;
+    case 2:
+        if (extract32(cpg->clkstp00, ck->offset, 1) == 0) {
+            period = clock_get(cpg->clk_ick);
+        }
+        break;
+    }
+    if (clock_get(out) != period) {
+        clock_update(out, period);
+    }
+}
+
+static void update_divrate(SH7751CPGBaseState *cpg)
+{
+    SH7751CPGBaseClass *k = SH7751CPG_GET_CLASS(cpg);
+    int ick = FIELD_EX32(cpg->freqcr, FREQCR, IFC);
+    int bck = FIELD_EX32(cpg->freqcr, FREQCR, BFC);
+    int pck = FIELD_EX32(cpg->freqcr, FREQCR, PFC);
+    const dev_clock_t *p = dev_clock_list;
+    uint32_t divinput;
+
+    divinput = cpg->xtal_freq_hz * k->pll1mul(cpg->clock_mode, cpg->freqcr);
+
+    ick = ick < 4 ? ick + 1 : (ick - 1) * 2;
+    clock_update_hz(cpg->clk_ick, divinput / ick);
+    bck = bck < 4 ? bck + 1 : (bck - 1) * 2;
+    clock_update_hz(cpg->clk_bck, divinput / bck);
+    pck = pck < 3 ? pck + 2 : pck * 2;
+    clock_update_hz(cpg->clk_pck, divinput / pck);
+
+     while (p->name) {
+        set_clock_in(cpg, p);
+        p++;
+    }
+}
+
+static const dev_clock_t *find_clock_list(int crno, int bit)
+{
+    const dev_clock_t *ret = dev_clock_list;
+    while (ret->name) {
+        if (ret->reg == crno && ret->offset == bit) {
+            return ret;
+        }
+        ret++;
+    }
+    return NULL;
+}
+
+static void update_stbcr(SH7751CPGBaseState *cpg, int no, uint32_t diff)
+{
+    int bit = 0;
+    const dev_clock_t *p;
+    static const char *reg[] = {"STBCR", "STBCR2", "CLKSTP00"};
+
+    while (diff) {
+        if (diff & 1) {
+            p = find_clock_list(no, bit);
+            if (p) {
+                set_clock_in(cpg, p);
+            } else {
+                qemu_log_mask(LOG_UNIMP, "sh7751-cpg: %s "
+                              " bit %d is not implement.\n", reg[no], bit);
+            }
+        }
+        bit++;
+        diff >>= 1;
+    }
+}
+
+static uint64_t cpg_read(void *opaque, hwaddr addr, unsigned size)
+{
+    SH7751CPGBaseState *cpg = SH7751CPGBase(opaque);
+    int reg;
+
+    switch (addr) {
+    case A_FREQCR:
+        if (size != 2) {
+            qemu_log_mask(LOG_GUEST_ERROR, "sh7751-cpg: Register 0x%"
+                          HWADDR_PRIX " Invalid access size.\n", addr);
+            return UINT64_MAX;
+        }
+        return cpg->freqcr;
+    case A_STBCR:
+    case A_STBCR2:
+        if (size != 1) {
+            qemu_log_mask(LOG_GUEST_ERROR, "sh7751-cpg: Register 0x%"
+                          HWADDR_PRIX " Invalid access size.\n", addr);
+            return UINT64_MAX;
+        }
+        reg = extract32(addr, 4, 1); /* STBCR -> 0x04 / STBCR2 -> 0x10 */
+        return cpg->stbcr[reg];
+        break;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR, "sh7751-cpg: Register 0x%"
+                      HWADDR_PRIX " Invalid address.\n", addr);
+        return UINT64_MAX;
+    }
+
+}
+
+static void cpg_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
+{
+    SH7751CPGBaseState *cpg = SH7751CPGBase(opaque);
+    uint32_t old_stbcr;
+    int reg;
+
+    switch (addr) {
+    case A_FREQCR:
+        if (size != 2) {
+            qemu_log_mask(LOG_GUEST_ERROR, "sh7751-cpg: Register 0x%"
+                          HWADDR_PRIX " Invalid access size.\n", addr);
+            return;
+        }
+        if ((cpg->freqcr ^ val) & 0x0600) {
+            qemu_log_mask(LOG_UNIMP,
+                          "sh7751-cpg: PLL operation not supported.\n");
+        }
+        cpg->freqcr = val;
+        update_divrate(cpg);
+        break;
+    case A_STBCR:
+    case A_STBCR2:
+        if (size != 1) {
+            qemu_log_mask(LOG_GUEST_ERROR, "sh7751-cpg: Register 0x%"
+                          HWADDR_PRIX " Invalid access size.\n", addr);
+            return;
+        }
+        reg = extract32(addr, 4, 1); /* STBCR -> 0x04 / STBCR2 -> 0x10 */
+        old_stbcr = cpg->stbcr[reg];
+        old_stbcr ^= val;
+        cpg->stbcr[reg] = val;
+        update_stbcr(cpg, reg, old_stbcr);
+        break;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR, "sh7751-cpg: Register 0x%"
+                      HWADDR_PRIX " Invalid address.\n", addr);
+    }
+}
+
+static uint64_t stp_read(void *opaque, hwaddr addr, unsigned size)
+{
+    SH7751CPGBaseState *cpg = SH7751CPGBase(opaque);
+
+    switch (addr) {
+    case A_CLKSTP00:
+        return cpg->clkstp00;
+    case A_CLKSTPCLR00:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "sh7751-cpg: CLKSTPCLR00 is write only.\n");
+        return UINT64_MAX;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR, "sh7751-cpg: Register 0x%"
+                      HWADDR_PRIX " Invalid address.\n", addr);
+        return UINT64_MAX;
+    }
+}
+
+static void stp_write(void *opaque, hwaddr addr, uint64_t val, unsigned size)
+{
+    SH7751CPGBaseState *cpg = SH7751CPGBase(opaque);
+
+    val &= 0x7;
+    switch (addr) {
+    case A_CLKSTP00:
+        cpg->clkstp00 |= val;
+        update_stbcr(cpg, 2, val);
+        break;
+    case A_CLKSTPCLR00:
+        cpg->clkstp00 &= ~val;
+        update_stbcr(cpg, 2, val);
+        break;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR, "sh7751-cpg: Register 0x%"
+                      HWADDR_PRIX " Invalid address.\n", addr);
+    }
+}
+
+static int sh7751_pll1mul(int mode, uint16_t freqcr)
+{
+    int div1;
+    int pll1;
+    switch (mode) {
+    case 3:
+    case 5:
+    case 6:
+        div1 = 2;
+        break;
+    default:
+        div1 = 1;
+    }
+    if (FIELD_EX16(freqcr, FREQCR, PLL1EN)) {
+        pll1 = 6;
+    } else {
+        pll1 = 1;
+    }
+    return pll1 / div1;
+}
+
+static int sh7751r_pll1mul(int mode, uint16_t freqcr)
+{
+    int pll1;
+    switch (mode) {
+    case 0:
+    case 1:
+    case 3:
+    case 5:
+        pll1 = 12;
+        break;
+    case 2:
+    case 4:
+    case 6:
+        pll1 = 6;
+        break;
+    default:
+        g_assert_not_reached();
+    }
+    if (!FIELD_EX16(freqcr, FREQCR, PLL1EN)) {
+        pll1 = 1;
+    }
+    return pll1;
+}
+
+static const MemoryRegionOps cpg_ops = {
+    .write = cpg_write,
+    .read  = cpg_read,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+    .impl = {
+        .min_access_size = 1,
+        .max_access_size = 4,
+    },
+};
+
+static const MemoryRegionOps stp_ops = {
+    .write = stp_write,
+    .read  = stp_read,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
+};
+
+static const ClockPortInitArray sh7751_cpg_clocks = {
+    QDEV_CLOCK_OUT(SH7751CPGBaseState, clk_ick),
+    QDEV_CLOCK_OUT(SH7751CPGBaseState, clk_bck),
+    QDEV_CLOCK_OUT(SH7751CPGBaseState, clk_pck),
+    QDEV_CLOCK_END
+};
+
+static void sh7751cpg_realize(DeviceState *dev, Error **errp)
+{
+    SH7751CPGBaseState *cpg = SH7751CPGBase(dev);
+    SH7751CPGBaseClass *k = SH7751CPG_GET_CLASS(cpg);
+
+    if (cpg->xtal_freq_hz == 0) {
+        error_setg(errp, "\"xtal-frequency-hz\" property must be provided.");
+        return;
+    }
+    /* XTAL range: 1-34 MHz */
+    if (cpg->xtal_freq_hz < SH7751_XTAL_MIN_HZ ||
+        cpg->xtal_freq_hz > SH7751_XTAL_MAX_HZ) {
+        error_setg(errp, "\"xtal-frequency-hz\" property in incorrect range.");
+        return;
+    }
+    /* Clock mode: 0 - 6 */
+    if (cpg->clock_mode > 6) {
+        error_setg(errp, "\"clock-mode\" property in incorrect range.");
+        return;
+    }
+
+    cpg->freqcr = k->initfreqcr[cpg->clock_mode];
+    update_divrate(cpg);
+}
+
+static void sh7751_cpg_init(Object *obj)
+{
+    SH7751CPGBaseState *cpg = SH7751CPGBase(obj);
+    const dev_clock_t *p = dev_clock_list;
+    qdev_init_clocks(DEVICE(obj), sh7751_cpg_clocks);
+    /* connect parent clock */
+    while (p->name) {
+        cpg->dev_clocks[p->devnum] = qdev_init_clock_out(DEVICE(obj),
+                                                         p->name);
+        p++;
+    }
+
+    memory_region_init_io(&cpg->memory[0], OBJECT(cpg), &cpg_ops,
+                          cpg, "sh7751-cpg", 0x14);
+    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &cpg->memory[0]);
+    memory_region_init_alias(&cpg->memory[1], NULL,
+                             "sh7751-cpg-a4", &cpg->memory[0], 0, 0x14);
+    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &cpg->memory[1]);
+    memory_region_init_alias(&cpg->memory[2], NULL,
+                             "sh7751-cpg-p7", &cpg->memory[0], 0, 0x14);
+    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &cpg->memory[2]);
+    memory_region_init_io(&cpg->memory[3], OBJECT(cpg), &stp_ops,
+                          cpg, "sh7751-stp", 0x10);
+    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &cpg->memory[3]);
+    memory_region_init_alias(&cpg->memory[4], NULL,
+                             "sh7751-stp-a4", &cpg->memory[3], 0, 0x10);
+    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &cpg->memory[4]);
+    memory_region_init_alias(&cpg->memory[5], NULL,
+                             "sh7751-stp-p7", &cpg->memory[3], 0, 0x10u);
+    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &cpg->memory[5]);
+}
+
+static Property sh7751_cpg_properties[] = {
+    DEFINE_PROP_UINT32("xtal-frequency-hz",
+                       SH7751CPGBaseState, xtal_freq_hz, 0),
+    DEFINE_PROP_UINT32("clock-mode",
+                       SH7751CPGBaseState, clock_mode, 0),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void sh7751cpg_base_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    device_class_set_props(dc, sh7751_cpg_properties);
+}
+
+static void sh7751cpg_class_init(ObjectClass *klass, void *data)
+{
+    SH7751CPGBaseClass *base = SH7751CPGBaseClass(klass);
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    static uint16_t initfreqcr[] = {0x0e1a, 0x0e23, 0x0e13, 0x0e13,
+                                   0x0e0a, 0x0e0a, 0x0808};
+
+    base->pll1mul = sh7751_pll1mul;
+    base->initfreqcr = initfreqcr;
+    dc->realize = sh7751cpg_realize;
+}
+
+static void sh7751rcpg_class_init(ObjectClass *klass, void *data)
+{
+    SH7751CPGBaseClass *base = SH7751CPGBaseClass(klass);
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    static uint16_t initfreqcr[] = {0x0e1a, 0x0e2c, 0x0e13, 0x0e13,
+                                   0x0e0a, 0x0e0a, 0x0808};
+
+    base->pll1mul = sh7751r_pll1mul;
+    base->initfreqcr = initfreqcr;
+    dc->realize = sh7751cpg_realize;
+}
+
+static const TypeInfo sh7751cpg_info[] = {
+    {
+        .name       = TYPE_SH7751_CPG_BASE,
+        .parent     = TYPE_SYS_BUS_DEVICE,
+        .instance_size = sizeof(SH7751CPGBaseState),
+        .class_init = sh7751cpg_base_class_init,
+        .class_size = sizeof(SH7751CPGBaseClass),
+        .abstract = true,
+    },
+    {
+        .name       = TYPE_SH7751_CPG,
+        .parent     = TYPE_SH7751_CPG_BASE,
+        .instance_size = sizeof(SH7751CPGState),
+        .instance_init = sh7751_cpg_init,
+        .class_init = sh7751cpg_class_init,
+        .class_size = sizeof(SH7751CPGClass),
+    },
+    {
+        .name       = TYPE_SH7751R_CPG,
+        .parent     = TYPE_SH7751_CPG_BASE,
+        .instance_size = sizeof(SH7751RCPGState),
+        .instance_init = sh7751_cpg_init,
+        .class_init = sh7751rcpg_class_init,
+        .class_size = sizeof(SH7751RCPGClass),
+    },
+};
+
+DEFINE_TYPES(sh7751cpg_info)
diff --git a/hw/sh4/meson.build b/hw/sh4/meson.build
index 424d5674de..7ed8246152 100644
--- a/hw/sh4/meson.build
+++ b/hw/sh4/meson.build
@@ -2,6 +2,7 @@ sh4_ss = ss.source_set()
 sh4_ss.add(files(
   'sh7750.c',
   'sh7750_regnames.c',
+  'sh7751-cpg.c',
 ))
 sh4_ss.add(when: 'CONFIG_R2D', if_true: files('r2d.c'))
 sh4_ss.add(when: 'CONFIG_SHIX', if_true: files('shix.c'))
-- 
2.20.1