1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __GRLIB_APBUART_H__ 3#define __GRLIB_APBUART_H__ 4 5#include <asm/io.h> 6 7#define UART_NR 8 8static int grlib_apbuart_port_nr; 9 10struct grlib_apbuart_regs_map { 11 u32 data; 12 u32 status; 13 u32 ctrl; 14 u32 scaler; 15}; 16 17struct amba_prom_registers { 18 unsigned int phys_addr; 19 unsigned int reg_size; 20}; 21 22/* 23 * The following defines the bits in the APBUART Status Registers. 24 */ 25#define UART_STATUS_DR 0x00000001 /* Data Ready */ 26#define UART_STATUS_TSE 0x00000002 /* TX Send Register Empty */ 27#define UART_STATUS_THE 0x00000004 /* TX Hold Register Empty */ 28#define UART_STATUS_BR 0x00000008 /* Break Error */ 29#define UART_STATUS_OE 0x00000010 /* RX Overrun Error */ 30#define UART_STATUS_PE 0x00000020 /* RX Parity Error */ 31#define UART_STATUS_FE 0x00000040 /* RX Framing Error */ 32#define UART_STATUS_ERR 0x00000078 /* Error Mask */ 33 34/* 35 * The following defines the bits in the APBUART Ctrl Registers. 36 */ 37#define UART_CTRL_RE 0x00000001 /* Receiver enable */ 38#define UART_CTRL_TE 0x00000002 /* Transmitter enable */ 39#define UART_CTRL_RI 0x00000004 /* Receiver interrupt enable */ 40#define UART_CTRL_TI 0x00000008 /* Transmitter irq */ 41#define UART_CTRL_PS 0x00000010 /* Parity select */ 42#define UART_CTRL_PE 0x00000020 /* Parity enable */ 43#define UART_CTRL_FL 0x00000040 /* Flow control enable */ 44#define UART_CTRL_LB 0x00000080 /* Loopback enable */ 45 46#define APBBASE(port) ((struct grlib_apbuart_regs_map *)((port)->membase)) 47 48#define APBBASE_DATA_P(port) (&(APBBASE(port)->data)) 49#define APBBASE_STATUS_P(port) (&(APBBASE(port)->status)) 50#define APBBASE_CTRL_P(port) (&(APBBASE(port)->ctrl)) 51#define APBBASE_SCALAR_P(port) (&(APBBASE(port)->scaler)) 52 53#define UART_GET_CHAR(port) (__raw_readl(APBBASE_DATA_P(port))) 54#define UART_PUT_CHAR(port, v) (__raw_writel(v, APBBASE_DATA_P(port))) 55#define UART_GET_STATUS(port) (__raw_readl(APBBASE_STATUS_P(port))) 56#define UART_PUT_STATUS(port, v)(__raw_writel(v, APBBASE_STATUS_P(port))) 57#define UART_GET_CTRL(port) (__raw_readl(APBBASE_CTRL_P(port))) 58#define UART_PUT_CTRL(port, v) (__raw_writel(v, APBBASE_CTRL_P(port))) 59#define UART_GET_SCAL(port) (__raw_readl(APBBASE_SCALAR_P(port))) 60#define UART_PUT_SCAL(port, v) (__raw_writel(v, APBBASE_SCALAR_P(port))) 61 62#define UART_RX_DATA(s) (((s) & UART_STATUS_DR) != 0) 63#define UART_TX_READY(s) (((s) & UART_STATUS_THE) != 0) 64 65#endif /* __GRLIB_APBUART_H__ */ 66