Rename RISC-V_RV32_SiFive_HiFive1-FreedomStudio directory to RISC-V_RV32_SiFive_HiFiv...

[freertos] / FreeRTOS / Demo / RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio / freedom-metal / src / drivers / sifive_fe310-g000_hfrosc.c

diff --git a/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/src/drivers/sifive_fe310-g000_hfrosc.c b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/src/drivers/sifive_fe310-g000_hfrosc.c
new file mode 100644 (file)
index 0000000..61af8d3
--- /dev/null
+++ b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/src/drivers/sifive_fe310-g000_hfrosc.c
@@ -0,0 +1,44 @@
+/* Copyright 2018 SiFive, Inc */
+/* SPDX-License-Identifier: Apache-2.0 */
+
+#include <metal/machine/platform.h>
+
+#ifdef METAL_SIFIVE_FE310_G000_HFROSC
+
+#include <metal/drivers/sifive_fe310-g000_hfrosc.h>
+#include <metal/machine.h>
+
+#define CONFIG_DIVIDER 0x0000003FUL
+#define CONFIG_TRIM    0x001F0000UL
+#define CONFIG_ENABLE  0x40000000UL
+#define CONFIG_READY   0x80000000UL
+
+long __metal_driver_sifive_fe310_g000_hfrosc_get_rate_hz(const struct metal_clock *clock)
+{
+    struct metal_clock *ref = __metal_driver_sifive_fe310_g000_hfrosc_ref(clock);
+    long config_offset = __metal_driver_sifive_fe310_g000_hfrosc_config_offset(clock);
+    struct __metal_driver_sifive_fe310_g000_prci *config_base =
+      __metal_driver_sifive_fe310_g000_hfrosc_config_base(clock);
+    const struct __metal_driver_vtable_sifive_fe310_g000_prci *vtable =
+      __metal_driver_sifive_fe310_g000_prci_vtable();
+    long cfg = vtable->get_reg(config_base, config_offset);
+
+    if ((cfg & CONFIG_ENABLE) == 0)
+        return -1;
+    if ((cfg & CONFIG_READY) == 0)
+        return -1;
+    return metal_clock_get_rate_hz(ref) / ((cfg & CONFIG_DIVIDER) + 1);
+}
+
+long __metal_driver_sifive_fe310_g000_hfrosc_set_rate_hz(struct metal_clock *clock, long rate)
+{
+    return __metal_driver_sifive_fe310_g000_hfrosc_get_rate_hz(clock);
+}
+
+__METAL_DEFINE_VTABLE(__metal_driver_vtable_sifive_fe310_g000_hfrosc) = {
+    .clock.get_rate_hz = &__metal_driver_sifive_fe310_g000_hfrosc_get_rate_hz,
+    .clock.set_rate_hz = &__metal_driver_sifive_fe310_g000_hfrosc_set_rate_hz,
+};
+#endif /* METAL_SIFIVE_FE310_G000_HFROSC */
+
+typedef int no_empty_translation_units;