1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (C) 2016, STMicroelectronics - All Rights Reserved
4 * Author(s): Vikas Manocha, <vikas.manocha@st.com> for STMicroelectronics.
10 #define CR1_OFFSET(x) (x ? 0x0c : 0x00)
11 #define CR3_OFFSET(x) (x ? 0x14 : 0x08)
12 #define BRR_OFFSET(x) (x ? 0x08 : 0x0c)
13 #define ISR_OFFSET(x) (x ? 0x00 : 0x1c)
15 #define ICR_OFFSET 0x20
18 * STM32F4 has one Data Register (DR) for received or transmitted
19 * data, so map Receive Data Register (RDR) and Transmit Data
20 * Register (TDR) at the same offset
22 #define RDR_OFFSET(x) (x ? 0x04 : 0x24)
23 #define TDR_OFFSET(x) (x ? 0x04 : 0x28)
25 struct stm32_uart_info {
26 u8 uart_enable_bit; /* UART_CR1_UE */
27 bool stm32f4; /* true for STM32F4, false otherwise */
31 struct stm32_uart_info stm32f4_info = {
33 .uart_enable_bit = 13,
37 struct stm32_uart_info stm32f7_info = {
43 struct stm32_uart_info stm32h7_info = {
49 /* Information about a serial port */
50 struct stm32x7_serial_platdata {
51 fdt_addr_t base; /* address of registers in physical memory */
52 struct stm32_uart_info *uart_info;
53 unsigned long int clock_rate;
56 #define USART_CR1_FIFOEN BIT(29)
57 #define USART_CR1_M1 BIT(28)
58 #define USART_CR1_OVER8 BIT(15)
59 #define USART_CR1_M0 BIT(12)
60 #define USART_CR1_PCE BIT(10)
61 #define USART_CR1_PS BIT(9)
62 #define USART_CR1_TE BIT(3)
63 #define USART_CR1_RE BIT(2)
65 #define USART_CR3_OVRDIS BIT(12)
67 #define USART_ISR_TXE BIT(7)
68 #define USART_ISR_RXNE BIT(5)
69 #define USART_ISR_ORE BIT(3)
70 #define USART_ISR_PE BIT(0)
72 #define USART_BRR_F_MASK GENMASK(7, 0)
73 #define USART_BRR_M_SHIFT 4
74 #define USART_BRR_M_MASK GENMASK(15, 4)
76 #define USART_ICR_ORECF BIT(3)
77 #define USART_ICR_PCECF BIT(0)