[Qemu-arm] [PATCH 2/6] hw/char: QOM'ify cadence_uart model

[xiaoqiang zhao]

* drop qemu_char_get_next_serial and use chardev prop
* create cadence_uart_create wrapper function to create
  cadence_uart_device
* change affected board code to use the new way

Signed-off-by: xiaoqiang zhao <address@hidden>
---
 hw/arm/xilinx_zynq.c           |  5 +++--
 hw/arm/xlnx-zynqmp.c           |  1 +
 hw/char/cadence_uart.c         | 13 +++++++------
 include/hw/char/cadence_uart.h | 17 +++++++++++++++++
 4 files changed, 28 insertions(+), 8 deletions(-)

diff --git a/hw/arm/xilinx_zynq.c b/hw/arm/xilinx_zynq.c
index 98b17c9..aefebcf 100644
--- a/hw/arm/xilinx_zynq.c
+++ b/hw/arm/xilinx_zynq.c
@@ -32,6 +32,7 @@
 #include "hw/ssi/ssi.h"
 #include "qemu/error-report.h"
 #include "hw/sd/sd.h"
+#include "hw/char/cadence_uart.h"
 
 #define NUM_SPI_FLASHES 4
 #define NUM_QSPI_FLASHES 2
@@ -235,8 +236,8 @@ static void zynq_init(MachineState *machine)
     sysbus_create_simple("xlnx,ps7-usb", 0xE0002000, pic[53-IRQ_OFFSET]);
     sysbus_create_simple("xlnx,ps7-usb", 0xE0003000, pic[76-IRQ_OFFSET]);
 
-    sysbus_create_simple("cadence_uart", 0xE0000000, pic[59-IRQ_OFFSET]);
-    sysbus_create_simple("cadence_uart", 0xE0001000, pic[82-IRQ_OFFSET]);
+    cadence_uart_create(0xE0000000, pic[59 - IRQ_OFFSET], serial_hds[0]);
+    cadence_uart_create(0xE0001000, pic[82 - IRQ_OFFSET], serial_hds[1]);
 
     sysbus_create_varargs("cadence_ttc", 0xF8001000,
             pic[42-IRQ_OFFSET], pic[43-IRQ_OFFSET], pic[44-IRQ_OFFSET], NULL);
diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c
index 4d504da..9b893d7 100644
--- a/hw/arm/xlnx-zynqmp.c
+++ b/hw/arm/xlnx-zynqmp.c
@@ -308,6 +308,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error 
**errp)
     }
 
     for (i = 0; i < XLNX_ZYNQMP_NUM_UARTS; i++) {
+        qdev_prop_set_chr(DEVICE(&s->uart[i]), "chardev", serial_hds[i]);
         object_property_set_bool(OBJECT(&s->uart[i]), true, "realized", &err);
         if (err) {
             error_propagate(errp, err);
diff --git a/hw/char/cadence_uart.c b/hw/char/cadence_uart.c
index 442dac5..c856fc3 100644
--- a/hw/char/cadence_uart.c
+++ b/hw/char/cadence_uart.c
@@ -468,9 +468,6 @@ static void cadence_uart_realize(DeviceState *dev, Error 
**errp)
     s->fifo_trigger_handle = timer_new_ns(QEMU_CLOCK_VIRTUAL,
                                           fifo_trigger_update, s);
 
-    /* FIXME use a qdev chardev prop instead of qemu_char_get_next_serial() */
-    s->chr = qemu_char_get_next_serial();
-
     if (s->chr) {
         qemu_chr_add_handlers(s->chr, uart_can_receive, uart_receive,
                               uart_event, s);
@@ -517,6 +514,11 @@ static const VMStateDescription vmstate_cadence_uart = {
     }
 };
 
+static Property cadence_uart_properties[] = {
+    DEFINE_PROP_CHR("chardev", CadenceUARTState, chr),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
 static void cadence_uart_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -524,9 +526,8 @@ static void cadence_uart_class_init(ObjectClass *klass, 
void *data)
     dc->realize = cadence_uart_realize;
     dc->vmsd = &vmstate_cadence_uart;
     dc->reset = cadence_uart_reset;
-    /* Reason: realize() method uses qemu_char_get_next_serial() */
-    dc->cannot_instantiate_with_device_add_yet = true;
-}
+    dc->props = cadence_uart_properties;
+  }
 
 static const TypeInfo cadence_uart_info = {
     .name          = TYPE_CADENCE_UART,
diff --git a/include/hw/char/cadence_uart.h b/include/hw/char/cadence_uart.h
index 6310f52..a12773c 100644
--- a/include/hw/char/cadence_uart.h
+++ b/include/hw/char/cadence_uart.h
@@ -49,5 +49,22 @@ typedef struct {
     QEMUTimer *fifo_trigger_handle;
 } CadenceUARTState;
 
+static inline DeviceState *cadence_uart_create(hwaddr addr,
+                                        qemu_irq irq,
+                                        CharDriverState *chr)
+{
+    DeviceState *dev;
+    SysBusDevice *s;
+
+    dev = qdev_create(NULL, TYPE_CADENCE_UART);
+    s = SYS_BUS_DEVICE(dev);
+    qdev_prop_set_chr(dev, "chardev", chr);
+    qdev_init_nofail(dev);
+    sysbus_mmio_map(s, 0, addr);
+    sysbus_connect_irq(s, 0, irq);
+
+    return dev;
+}
+
 #define CADENCE_UART_H
 #endif
-- 
2.1.4