1 files changed, 106 insertions, 0 deletions
diff --git a/drivers/st/ddr/stm32mp_ddr.c b/drivers/st/ddr/stm32mp_ddr.c
new file mode 100644
index 0000000..6776e3b
--- /dev/null
+++ b/drivers/st/ddr/stm32mp_ddr.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2022, STMicroelectronics - All Rights Reserved
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <common/debug.h>
+#include <drivers/delay_timer.h>
+#include <drivers/st/stm32mp_ddr.h>
+#include <drivers/st/stm32mp_ddrctrl_regs.h>
+#include <drivers/st/stm32mp_pmic.h>
+#include <lib/mmio.h>
+
+#include <platform_def.h>
+
+#define INVALID_OFFSET	0xFFU
+
+static uintptr_t get_base_addr(const struct stm32mp_ddr_priv *priv, enum stm32mp_ddr_base_type base)
+{
+	if (base == DDRPHY_BASE) {
+		return (uintptr_t)priv->phy;
+	} else {
+		return (uintptr_t)priv->ctl;
+	}
+}
+
+void stm32mp_ddr_set_reg(const struct stm32mp_ddr_priv *priv, enum stm32mp_ddr_reg_type type,
+			 const void *param, const struct stm32mp_ddr_reg_info *ddr_registers)
+{
+	unsigned int i;
+	unsigned int value;
+	enum stm32mp_ddr_base_type base = ddr_registers[type].base;
+	uintptr_t base_addr = get_base_addr(priv, base);
+	const struct stm32mp_ddr_reg_desc *desc = ddr_registers[type].desc;
+
+	VERBOSE("init %s\n", ddr_registers[type].name);
+	for (i = 0; i < ddr_registers[type].size; i++) {
+		uintptr_t ptr = base_addr + desc[i].offset;
+
+		if (desc[i].par_offset == INVALID_OFFSET) {
+			ERROR("invalid parameter offset for %s", desc[i].name);
+			panic();
+		} else {
+			value = *((uint32_t *)((uintptr_t)param +
+					       desc[i].par_offset));
+			mmio_write_32(ptr, value);
+		}
+	}
+}
+
+/* Start quasi dynamic register update */
+void stm32mp_ddr_start_sw_done(struct stm32mp_ddrctl *ctl)
+{
+	mmio_clrbits_32((uintptr_t)&ctl->swctl, DDRCTRL_SWCTL_SW_DONE);
+	VERBOSE("[0x%lx] swctl = 0x%x\n",
+		(uintptr_t)&ctl->swctl,  mmio_read_32((uintptr_t)&ctl->swctl));
+}
+
+/* Wait quasi dynamic register update */
+void stm32mp_ddr_wait_sw_done_ack(struct stm32mp_ddrctl *ctl)
+{
+	uint64_t timeout;
+	uint32_t swstat;
+
+	mmio_setbits_32((uintptr_t)&ctl->swctl, DDRCTRL_SWCTL_SW_DONE);
+	VERBOSE("[0x%lx] swctl = 0x%x\n",
+		(uintptr_t)&ctl->swctl, mmio_read_32((uintptr_t)&ctl->swctl));
+
+	timeout = timeout_init_us(TIMEOUT_US_1S);
+	do {
+		swstat = mmio_read_32((uintptr_t)&ctl->swstat);
+		VERBOSE("[0x%lx] swstat = 0x%x ",
+			(uintptr_t)&ctl->swstat, swstat);
+		if (timeout_elapsed(timeout)) {
+			panic();
+		}
+	} while ((swstat & DDRCTRL_SWSTAT_SW_DONE_ACK) == 0U);
+
+	VERBOSE("[0x%lx] swstat = 0x%x\n",
+		(uintptr_t)&ctl->swstat, swstat);
+}
+
+void stm32mp_ddr_enable_axi_port(struct stm32mp_ddrctl *ctl)
+{
+	/* Enable uMCTL2 AXI port 0 */
+	mmio_setbits_32((uintptr_t)&ctl->pctrl_0, DDRCTRL_PCTRL_N_PORT_EN);
+	VERBOSE("[0x%lx] pctrl_0 = 0x%x\n", (uintptr_t)&ctl->pctrl_0,
+		mmio_read_32((uintptr_t)&ctl->pctrl_0));
+
+#if STM32MP_DDR_DUAL_AXI_PORT
+	/* Enable uMCTL2 AXI port 1 */
+	mmio_setbits_32((uintptr_t)&ctl->pctrl_1, DDRCTRL_PCTRL_N_PORT_EN);
+	VERBOSE("[0x%lx] pctrl_1 = 0x%x\n", (uintptr_t)&ctl->pctrl_1,
+		mmio_read_32((uintptr_t)&ctl->pctrl_1));
+#endif
+
+}
+
+int stm32mp_board_ddr_power_init(enum ddr_type ddr_type)
+{
+	if (dt_pmic_status() > 0) {
+		return pmic_ddr_power_init(ddr_type);
+	}
+
+	return 0;
+}