1 files changed, 123 insertions, 0 deletions
diff --git a/plat/rockchip/rk3399/drivers/pwm/pwm.c b/plat/rockchip/rk3399/drivers/pwm/pwm.c
new file mode 100644
index 00000000..11c1565e
--- /dev/null
+++ b/plat/rockchip/rk3399/drivers/pwm/pwm.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <plat_private.h>
+#include <pmu.h>
+#include <pwm.h>
+#include <soc.h>
+
+#define PWM0_IOMUX_PWM_EN		(1 << 0)
+#define PWM1_IOMUX_PWM_EN		(1 << 1)
+#define PWM2_IOMUX_PWM_EN		(1 << 2)
+#define PWM3_IOMUX_PWM_EN		(1 << 3)
+
+struct pwm_data_s {
+	uint32_t iomux_bitmask;
+	uint32_t enable_bitmask;
+};
+
+static struct pwm_data_s pwm_data;
+
+/*
+ * Disable the PWMs.
+ */
+void disable_pwms(void)
+{
+	uint32_t i, val;
+
+	pwm_data.iomux_bitmask = 0;
+
+	/* Save PWMs pinmux and change PWMs pinmux to GPIOs */
+	val = mmio_read_32(GRF_BASE + GRF_GPIO4C_IOMUX);
+	if (((val >> GRF_GPIO4C2_IOMUX_SHIFT) &
+		GRF_IOMUX_2BIT_MASK) == GRF_GPIO4C2_IOMUX_PWM) {
+		pwm_data.iomux_bitmask |= PWM0_IOMUX_PWM_EN;
+		val = BITS_WITH_WMASK(GRF_IOMUX_GPIO, GRF_IOMUX_2BIT_MASK,
+				    GRF_GPIO4C2_IOMUX_SHIFT);
+		mmio_write_32(GRF_BASE + GRF_GPIO4C_IOMUX, val);
+	}
+
+	val = mmio_read_32(GRF_BASE + GRF_GPIO4C_IOMUX);
+	if (((val >> GRF_GPIO4C6_IOMUX_SHIFT) &
+		GRF_IOMUX_2BIT_MASK) == GRF_GPIO4C6_IOMUX_PWM) {
+		pwm_data.iomux_bitmask |= PWM1_IOMUX_PWM_EN;
+		val = BITS_WITH_WMASK(GRF_IOMUX_GPIO, GRF_IOMUX_2BIT_MASK,
+				    GRF_GPIO4C6_IOMUX_SHIFT);
+		mmio_write_32(GRF_BASE + GRF_GPIO4C_IOMUX, val);
+	}
+
+	val = mmio_read_32(PMUGRF_BASE + PMUGRF_GPIO1C_IOMUX);
+	if (((val >> PMUGRF_GPIO1C3_IOMUX_SHIFT) &
+		GRF_IOMUX_2BIT_MASK) == PMUGRF_GPIO1C3_IOMUX_PWM) {
+		pwm_data.iomux_bitmask |= PWM2_IOMUX_PWM_EN;
+		val = BITS_WITH_WMASK(GRF_IOMUX_GPIO, GRF_IOMUX_2BIT_MASK,
+				    PMUGRF_GPIO1C3_IOMUX_SHIFT);
+		mmio_write_32(PMUGRF_BASE + PMUGRF_GPIO1C_IOMUX, val);
+	}
+
+	val = mmio_read_32(PMUGRF_BASE + PMUGRF_GPIO0A_IOMUX);
+	if (((val >> PMUGRF_GPIO0A6_IOMUX_SHIFT) &
+		GRF_IOMUX_2BIT_MASK) == PMUGRF_GPIO0A6_IOMUX_PWM) {
+		pwm_data.iomux_bitmask |= PWM3_IOMUX_PWM_EN;
+		val = BITS_WITH_WMASK(GRF_IOMUX_GPIO, GRF_IOMUX_2BIT_MASK,
+				    PMUGRF_GPIO0A6_IOMUX_SHIFT);
+		mmio_write_32(PMUGRF_BASE + PMUGRF_GPIO0A_IOMUX, val);
+	}
+
+	/* Disable the pwm channel */
+	pwm_data.enable_bitmask = 0;
+	for (i = 0; i < 4; i++) {
+		val = mmio_read_32(PWM_BASE + PWM_CTRL(i));
+		if ((val & PWM_ENABLE) != PWM_ENABLE)
+			continue;
+		pwm_data.enable_bitmask |= (1 << i);
+		mmio_write_32(PWM_BASE + PWM_CTRL(i), val & ~PWM_ENABLE);
+	}
+}
+
+/*
+ * Enable the PWMs.
+ */
+void enable_pwms(void)
+{
+	uint32_t i, val;
+
+	for (i = 0; i < 4; i++) {
+		val = mmio_read_32(PWM_BASE + PWM_CTRL(i));
+		if (!(pwm_data.enable_bitmask & (1 << i)))
+			continue;
+		mmio_write_32(PWM_BASE + PWM_CTRL(i), val | PWM_ENABLE);
+	}
+
+	/* Restore all IOMUXes */
+	if (pwm_data.iomux_bitmask & PWM3_IOMUX_PWM_EN) {
+		val = BITS_WITH_WMASK(PMUGRF_GPIO0A6_IOMUX_PWM,
+				    GRF_IOMUX_2BIT_MASK,
+				    PMUGRF_GPIO0A6_IOMUX_SHIFT);
+		mmio_write_32(PMUGRF_BASE + PMUGRF_GPIO0A_IOMUX, val);
+	}
+
+	if (pwm_data.iomux_bitmask & PWM2_IOMUX_PWM_EN) {
+		val = BITS_WITH_WMASK(PMUGRF_GPIO1C3_IOMUX_PWM,
+				    GRF_IOMUX_2BIT_MASK,
+				    PMUGRF_GPIO1C3_IOMUX_SHIFT);
+		mmio_write_32(PMUGRF_BASE + PMUGRF_GPIO1C_IOMUX, val);
+	}
+
+	if (pwm_data.iomux_bitmask & PWM1_IOMUX_PWM_EN) {
+		val = BITS_WITH_WMASK(GRF_GPIO4C6_IOMUX_PWM,
+				    GRF_IOMUX_2BIT_MASK,
+				    GRF_GPIO4C6_IOMUX_SHIFT);
+		mmio_write_32(GRF_BASE + GRF_GPIO4C_IOMUX, val);
+	}
+
+	if (pwm_data.iomux_bitmask & PWM0_IOMUX_PWM_EN) {
+		val = BITS_WITH_WMASK(GRF_GPIO4C2_IOMUX_PWM,
+				    GRF_IOMUX_2BIT_MASK,
+				    GRF_GPIO4C2_IOMUX_SHIFT);
+		mmio_write_32(GRF_BASE + GRF_GPIO4C_IOMUX, val);
+	}
+}