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