Adding upstream version 2.8.0+dfsg.upstream/2.8.0+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 112 insertions, 0 deletions

diff --git a/plat/mediatek/drivers/uart/uart.c b/plat/mediatek/drivers/uart/uart.c
new file mode 100644
index 0000000..fdaa793
--- /dev/null
+++ b/plat/mediatek/drivers/uart/uart.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2020-2022, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <lib/mmio.h>
+#include <uart.h>
+
+static struct mt_uart uart_save_addr[DRV_SUPPORT_UART_PORTS];
+
+static const uint32_t uart_base_addr[DRV_SUPPORT_UART_PORTS] = {
+	UART0_BASE,
+	UART1_BASE
+};
+
+void mt_uart_restore(void)
+{
+	int uart_idx = UART_PORT0;
+	struct mt_uart *uart;
+	unsigned long base;
+
+	/* Must NOT print any debug log before UART restore */
+	for (uart_idx = UART_PORT0; uart_idx < HW_SUPPORT_UART_PORTS;
+	     uart_idx++) {
+
+		uart = &uart_save_addr[uart_idx];
+		base = uart->base;
+
+		mmio_write_32(UART_LCR(base), UART_LCR_MODE_B);
+		mmio_write_32(UART_EFR(base), uart->registers.efr);
+		mmio_write_32(UART_LCR(base), uart->registers.lcr);
+		mmio_write_32(UART_FCR(base), uart->registers.fcr);
+
+		/* baudrate */
+		mmio_write_32(UART_HIGHSPEED(base), uart->registers.highspeed);
+		mmio_write_32(UART_FRACDIV_L(base), uart->registers.fracdiv_l);
+		mmio_write_32(UART_FRACDIV_M(base), uart->registers.fracdiv_m);
+		mmio_write_32(UART_LCR(base),
+			      uart->registers.lcr | UART_LCR_DLAB);
+		mmio_write_32(UART_DLL(base), uart->registers.dll);
+		mmio_write_32(UART_DLH(base), uart->registers.dlh);
+		mmio_write_32(UART_LCR(base), uart->registers.lcr);
+		mmio_write_32(UART_SAMPLE_COUNT(base),
+			      uart->registers.sample_count);
+		mmio_write_32(UART_SAMPLE_POINT(base),
+			      uart->registers.sample_point);
+		mmio_write_32(UART_GUARD(base), uart->registers.guard);
+
+		/* flow control */
+		mmio_write_32(UART_ESCAPE_EN(base), uart->registers.escape_en);
+		mmio_write_32(UART_MCR(base), uart->registers.mcr);
+		mmio_write_32(UART_IER(base), uart->registers.ier);
+		mmio_write_32(UART_SCR(base), uart->registers.scr);
+	}
+}
+
+void mt_uart_save(void)
+{
+	int uart_idx = UART_PORT0;
+	struct mt_uart *uart;
+	unsigned long base;
+
+	for (uart_idx = UART_PORT0; uart_idx < HW_SUPPORT_UART_PORTS;
+	     uart_idx++) {
+
+		uart_save_addr[uart_idx].base = uart_base_addr[uart_idx];
+		base = uart_base_addr[uart_idx];
+		uart = &uart_save_addr[uart_idx];
+		uart->registers.lcr = mmio_read_32(UART_LCR(base));
+
+		mmio_write_32(UART_LCR(base), UART_LCR_MODE_B);
+		uart->registers.efr = mmio_read_32(UART_EFR(base));
+		mmio_write_32(UART_LCR(base), uart->registers.lcr);
+		uart->registers.fcr = mmio_read_32(UART_FCR_RD(base));
+
+		/* baudrate */
+		uart->registers.highspeed = mmio_read_32(UART_HIGHSPEED(base));
+		uart->registers.fracdiv_l = mmio_read_32(UART_FRACDIV_L(base));
+		uart->registers.fracdiv_m = mmio_read_32(UART_FRACDIV_M(base));
+		mmio_write_32(UART_LCR(base),
+			      uart->registers.lcr | UART_LCR_DLAB);
+		uart->registers.dll = mmio_read_32(UART_DLL(base));
+		uart->registers.dlh = mmio_read_32(UART_DLH(base));
+		mmio_write_32(UART_LCR(base), uart->registers.lcr);
+		uart->registers.sample_count = mmio_read_32(
+						UART_SAMPLE_COUNT(base));
+		uart->registers.sample_point = mmio_read_32(
+						UART_SAMPLE_POINT(base));
+		uart->registers.guard = mmio_read_32(UART_GUARD(base));
+
+		/* flow control */
+		uart->registers.escape_en = mmio_read_32(UART_ESCAPE_EN(base));
+		uart->registers.mcr = mmio_read_32(UART_MCR(base));
+		uart->registers.ier = mmio_read_32(UART_IER(base));
+		uart->registers.scr = mmio_read_32(UART_SCR(base));
+	}
+}
+
+void mt_console_uart_cg(int on)
+{
+	if (on == 1) {
+		mmio_write_32(UART_CLOCK_GATE_CLR, UART0_CLOCK_GATE_BIT);
+	} else {
+		mmio_write_32(UART_CLOCK_GATE_SET, UART0_CLOCK_GATE_BIT);
+	}
+}
+
+uint32_t mt_console_uart_cg_status(void)
+{
+	return mmio_read_32(UART_CLOCK_GATE_STA) & UART0_CLOCK_GATE_BIT;
+}