[PATCH v4 2/3] hw/riscv: add DesignWare APB timer to K230 board

[raoyi <rao232328@gmail.com>]

Wire up the DesignWare APB timer to the K230 SoC with
num-timers=6 and a 6.25 MHz clock. Connect timer IRQs
to the PLIC. Remove the previous unimplemented timer stub.

Signed-off-by: raoyi <rao232328@gmail.com>
---
 hw/riscv/Kconfig        |  1 +
 hw/riscv/k230.c         | 33 ++++++++++++++++++++++++++++++---
 include/hw/riscv/k230.h |  8 ++++++++
 3 files changed, 39 insertions(+), 3 deletions(-)

diff --git a/hw/riscv/Kconfig b/hw/riscv/Kconfig
index de37c08cae..c2c01af6ee 100644
--- a/hw/riscv/Kconfig
+++ b/hw/riscv/Kconfig
@@ -162,3 +162,4 @@ config K230
     select SERIAL_MM
     select UNIMP
     select K230_WDT
+    select DW_APB_TIMER
diff --git a/hw/riscv/k230.c b/hw/riscv/k230.c
index 656f28190c..78a05492ad 100644
--- a/hw/riscv/k230.c
+++ b/hw/riscv/k230.c
@@ -24,6 +24,8 @@
 #include "target/riscv/cpu.h"
 #include "hw/core/loader.h"
 #include "hw/core/sysbus.h"
+#include "hw/core/clock.h"
+#include "hw/core/qdev-clock.h"
 #include "hw/riscv/k230.h"
 #include "hw/riscv/boot.h"
 #include "hw/riscv/machines-qom.h"
@@ -37,6 +39,9 @@
 #define K230_DIRECT_KERNEL_ADDR  0x8200000
 #define K230_DIRECT_DTB_ADDR     0xa000000
 
+#define K230_TIMER_NUM_CHANNELS 6
+#define K230_TIMER_DEFAULT_FREQ 6250000
+
 static const MemMapEntry memmap[] = {
     [K230_DEV_DDRC] =         { 0x00000000,  0x80000000 },
     [K230_DEV_KPU_L2_CACHE] = { 0x80000000,  0x00200000 },
@@ -110,6 +115,19 @@ static void k230_soc_init(Object *obj)
     object_initialize_child(obj, "c908-cpu", cpu0, TYPE_RISCV_HART_ARRAY);
     object_initialize_child(obj, "k230-wdt0", &s->wdt[0], TYPE_K230_WDT);
     object_initialize_child(obj, "k230-wdt1", &s->wdt[1], TYPE_K230_WDT);
+    object_initialize_child(obj, "dw-apb-timer", &s->timer,
+                            TYPE_DW_APB_TIMER);
+
+    qdev_prop_set_uint32(DEVICE(&s->timer), "num-timers",
+                         K230_TIMER_NUM_CHANNELS);
+
+    Clock *timer_clk = clock_new(OBJECT(s), "timer-clk");
+    clock_set_hz(timer_clk, K230_TIMER_DEFAULT_FREQ);
+    for (int i = 0; i < K230_TIMER_NUM_CHANNELS; i++) {
+        g_autofree char *clock_name = g_strdup_printf("timer[%d]", i);
+
+        qdev_connect_clock_in(DEVICE(&s->timer), clock_name, timer_clk);
+    }
 
     qdev_prop_set_uint32(DEVICE(cpu0), "hartid-base", 0);
     qdev_prop_set_string(DEVICE(cpu0), "cpu-type", TYPE_RISCV_CPU_THEAD_C908);
@@ -191,6 +209,18 @@ static void k230_soc_realize(DeviceState *dev, Error **errp)
         k230_create_uart(sys_mem, DEVICE(s->c908_plic), i);
     }
 
+    /* Timer */
+    if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer), errp)) {
+        return;
+    }
+    sysbus_mmio_map(SYS_BUS_DEVICE(&s->timer), 0, memmap[K230_DEV_TIMER].base);
+
+    for (int i = 0; i < K230_TIMER_NUM_CHANNELS; i++) {
+        sysbus_connect_irq(SYS_BUS_DEVICE(&s->timer), i,
+                           qdev_get_gpio_in(DEVICE(s->c908_plic),
+                                            K230_TIMER0_IRQ + i));
+    }
+
     /* Watchdog */
     for (int i = 0; i < 2; i++) {
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->wdt[i]), errp)) {
@@ -283,9 +313,6 @@ static void k230_soc_realize(DeviceState *dev, Error **errp)
     create_unimplemented_device("iomux", memmap[K230_DEV_IOMUX].base,
                                 memmap[K230_DEV_IOMUX].size);
 
-    create_unimplemented_device("timer", memmap[K230_DEV_TIMER].base,
-                                memmap[K230_DEV_TIMER].size);
-
     create_unimplemented_device("wdt0", memmap[K230_DEV_WDT0].base,
                                 memmap[K230_DEV_WDT0].size);
 
diff --git a/include/hw/riscv/k230.h b/include/hw/riscv/k230.h
index 592e1c26bf..42a36664eb 100644
--- a/include/hw/riscv/k230.h
+++ b/include/hw/riscv/k230.h
@@ -18,6 +18,7 @@
 #include "hw/core/boards.h"
 #include "hw/riscv/riscv_hart.h"
 #include "hw/watchdog/k230_wdt.h"
+#include "hw/timer/dw-apb-timer.h"
 
 #define C908_CPU_HARTID   (0)
 
@@ -33,6 +34,7 @@ typedef struct K230SoCState {
     RISCVHartArrayState c908_cpu; /* Small core */
 
     K230WdtState wdt[2];
+    DWAPBTimerState timer;
     MemoryRegion sram;
     MemoryRegion bootrom;
 
@@ -127,6 +129,12 @@ enum {
     K230_UART2_IRQ  = 18,
     K230_UART3_IRQ  = 19,
     K230_UART4_IRQ  = 20,
+    K230_TIMER0_IRQ = 101,
+    K230_TIMER1_IRQ = 102,
+    K230_TIMER2_IRQ = 103,
+    K230_TIMER3_IRQ = 104,
+    K230_TIMER4_IRQ = 105,
+    K230_TIMER5_IRQ = 106,
     K230_WDT0_IRQ   = 107,
     K230_WDT1_IRQ   = 108,
 };
-- 
2.53.0