3 * Vikas Manocha, <vikas.manocha@st.com>
5 * SPDX-License-Identifier: GPL-2.0+
8 #ifndef _SERIAL_STM32_X7_
9 #define _SERIAL_STM32_X7_
11 #define CR1_OFFSET(x) (x ? 0x0c : 0x00)
12 #define CR3_OFFSET(x) (x ? 0x14 : 0x08)
13 #define BRR_OFFSET(x) (x ? 0x08 : 0x0c)
14 #define ISR_OFFSET(x) (x ? 0x00 : 0x1c)
16 * STM32F4 has one Data Register (DR) for received or transmitted
17 * data, so map Receive Data Register (RDR) and Transmit Data
18 * Register (TDR) at the same offset
20 #define RDR_OFFSET(x) (x ? 0x04 : 0x24)
21 #define TDR_OFFSET(x) (x ? 0x04 : 0x28)
23 struct stm32_uart_info {
24 u8 uart_enable_bit; /* UART_CR1_UE */
25 bool stm32f4; /* true for STM32F4, false otherwise */
26 bool has_overrun_disable;
29 struct stm32_uart_info stm32x7_info = {
32 .has_overrun_disable = true,
35 /* Information about a serial port */
36 struct stm32x7_serial_platdata {
37 fdt_addr_t base; /* address of registers in physical memory */
38 struct stm32_uart_info *uart_info;
39 unsigned long int clock_rate;
42 #define USART_CR1_OVER8 BIT(15)
43 #define USART_CR1_TE BIT(3)
44 #define USART_CR1_RE BIT(2)
46 #define USART_CR3_OVRDIS BIT(12)
48 #define USART_SR_FLAG_RXNE BIT(5)
49 #define USART_SR_FLAG_TXE BIT(7)
51 #define USART_BRR_F_MASK GENMASK(7, 0)
52 #define USART_BRR_M_SHIFT 4
53 #define USART_BRR_M_MASK GENMASK(15, 4)