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authorPeter Maydell <peter.maydell@linaro.org>2013-02-04 13:28:02 +0000
committerPeter Maydell <peter.maydell@linaro.org>2013-02-04 15:25:39 +0000
commit7b8497572f444df6c0b72bf33869f64cd32884db (patch)
tree6b10087fca2dbd3b63cf282b00e0d26499224dde
parent219b775b4c45f19f14e89d6ea8a17b1d23baae14 (diff)
downloadqemu-arm-7b8497572f444df6c0b72bf33869f64cd32884db.tar.gz
hw/arm_sysctl: Implement SYS_CFG_VOLT
Implement the SYS_CFG_VOLT registers which return the voltage of various supplies on motherboard and daughterboard. Since QEMU implements a perfectly stable power supply these registers always return a constant value. The number and value of the daughterboard voltages is dependent on the specific daughterboard, so we use a property array to allow the board to configure them appropriately. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
-rw-r--r--hw/arm_sysctl.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/hw/arm_sysctl.c b/hw/arm_sysctl.c
index 6d135acdee..0d79310fce 100644
--- a/hw/arm_sysctl.c
+++ b/hw/arm_sysctl.c
@@ -35,6 +35,8 @@ typedef struct {
uint32_t sys_cfgctrl;
uint32_t sys_cfgstat;
uint32_t sys_clcd;
+ uint32_t db_num_vsensors;
+ uint32_t *db_voltage;
} arm_sysctl_state;
static const VMStateDescription vmstate_arm_sysctl = {
@@ -236,6 +238,19 @@ static bool vexpress_cfgctrl_read(arm_sysctl_state *s, unsigned int dcc,
}
switch (function) {
+ case SYS_CFG_VOLT:
+ if (site == SYS_CFG_SITE_DB1 && device < s->db_num_vsensors) {
+ *val = s->db_voltage[device];
+ return true;
+ }
+ if (site == SYS_CFG_SITE_MB && device == 0) {
+ /* There is only one motherboard voltage sensor:
+ * VIO : 3.3V : bus voltage between mother and daughterboard
+ */
+ *val = 3300000;
+ return true;
+ }
+ break;
default:
break;
}
@@ -537,9 +552,19 @@ static void arm_sysctl_init(Object *obj)
qdev_init_gpio_out(dev, &s->pl110_mux_ctrl, 1);
}
+static void arm_sysctl_finalize(Object *obj)
+{
+ SysBusDevice *dev = SYS_BUS_DEVICE(obj);
+ arm_sysctl_state *s = FROM_SYSBUS(arm_sysctl_state, dev);
+ g_free(s->db_voltage);
+}
+
static Property arm_sysctl_properties[] = {
DEFINE_PROP_UINT32("sys_id", arm_sysctl_state, sys_id, 0),
DEFINE_PROP_UINT32("proc_id", arm_sysctl_state, proc_id, 0),
+ /* Daughterboard power supply voltages (as reported via SYS_CFG) */
+ DEFINE_PROP_ARRAY("db-voltage", arm_sysctl_state, db_num_vsensors,
+ db_voltage, qdev_prop_uint32, uint32_t),
DEFINE_PROP_END_OF_LIST(),
};
@@ -557,6 +582,7 @@ static const TypeInfo arm_sysctl_info = {
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(arm_sysctl_state),
.instance_init = arm_sysctl_init,
+ .instance_finalize = arm_sysctl_finalize,
.class_init = arm_sysctl_class_init,
};