serial: stm32: Rename serial_stm32x7.c to serial_stm32.c

Now this driver is used across stm32f4, stm32f7 and stm32h7
SoCs family, give it a generic name.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Vikas Manocha <vikas.manocha@st.com>

1 files changed, 72 insertions, 0 deletions

diff --git a/drivers/serial/serial_stm32.h b/drivers/serial/serial_stm32.h
new file mode 100644
index 0000000000..d08ba1f55f
--- /dev/null
+++ b/drivers/serial/serial_stm32.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2016, STMicroelectronics - All Rights Reserved
+ * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _SERIAL_STM32_
+#define _SERIAL_STM32_
+
+#define CR1_OFFSET(x)	(x ? 0x0c : 0x00)
+#define CR3_OFFSET(x)	(x ? 0x14 : 0x08)
+#define BRR_OFFSET(x)	(x ? 0x08 : 0x0c)
+#define ISR_OFFSET(x)	(x ? 0x00 : 0x1c)
+/*
+ * STM32F4 has one Data Register (DR) for received or transmitted
+ * data, so map Receive Data Register (RDR) and Transmit Data
+ * Register (TDR) at the same offset
+ */
+#define RDR_OFFSET(x)	(x ? 0x04 : 0x24)
+#define TDR_OFFSET(x)	(x ? 0x04 : 0x28)
+
+struct stm32_uart_info {
+	u8 uart_enable_bit;	/* UART_CR1_UE */
+	bool stm32f4;		/* true for STM32F4, false otherwise */
+	bool has_overrun_disable;
+	bool has_fifo;
+};
+
+struct stm32_uart_info stm32f4_info = {
+	.stm32f4 = true,
+	.uart_enable_bit = 13,
+	.has_overrun_disable = false,
+	.has_fifo = false,
+};
+
+struct stm32_uart_info stm32f7_info = {
+	.uart_enable_bit = 0,
+	.stm32f4 = false,
+	.has_overrun_disable = true,
+	.has_fifo = false,
+};
+
+struct stm32_uart_info stm32h7_info = {
+	.uart_enable_bit = 0,
+	.stm32f4 = false,
+	.has_overrun_disable = true,
+	.has_fifo = true,
+};
+
+/* Information about a serial port */
+struct stm32x7_serial_platdata {
+	fdt_addr_t base;  /* address of registers in physical memory */
+	struct stm32_uart_info *uart_info;
+	unsigned long int clock_rate;
+};
+
+#define USART_CR1_FIFOEN		BIT(29)
+#define USART_CR1_OVER8			BIT(15)
+#define USART_CR1_TE			BIT(3)
+#define USART_CR1_RE			BIT(2)
+
+#define USART_CR3_OVRDIS		BIT(12)
+
+#define USART_SR_FLAG_RXNE		BIT(5)
+#define USART_SR_FLAG_TXE		BIT(7)
+
+#define USART_BRR_F_MASK		GENMASK(7, 0)
+#define USART_BRR_M_SHIFT		4
+#define USART_BRR_M_MASK		GENMASK(15, 4)
+
+#endif