1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 *  Driver for CPM (SCC/SMC) serial ports
4 *
5 *  Copyright (C) 2004 Freescale Semiconductor, Inc.
6 *
7 *  2006 (c) MontaVista Software, Inc.
8 *	Vitaly Bordug <vbordug@ru.mvista.com>
9 */
10#ifndef CPM_UART_H
11#define CPM_UART_H
12
13#include <linux/platform_device.h>
14
15struct gpio_desc;
16
17#if defined(CONFIG_CPM2)
18#include "asm/cpm2.h"
19#elif defined(CONFIG_CPM1)
20#include "asm/cpm1.h"
21#endif
22
23#define DPRAM_BASE	((u8 __iomem *)cpm_muram_addr(0))
24
25#define SERIAL_CPM_MAJOR	204
26#define SERIAL_CPM_MINOR	46
27
28#define IS_SMC(pinfo)		(pinfo->flags & FLAG_SMC)
29#define FLAG_SMC	0x00000002
30#define FLAG_CONSOLE	0x00000001
31
32#define UART_NR		6
33
34#define RX_NUM_FIFO	4
35#define RX_BUF_SIZE	32
36#define TX_NUM_FIFO	4
37#define TX_BUF_SIZE	32
38
39#define GPIO_CTS	0
40#define GPIO_RTS	1
41#define GPIO_DCD	2
42#define GPIO_DSR	3
43#define GPIO_DTR	4
44#define GPIO_RI		5
45
46#define NUM_GPIOS	(GPIO_RI+1)
47
48struct uart_cpm_port {
49	struct uart_port	port;
50	u16			rx_nrfifos;
51	u16			rx_fifosize;
52	u16			tx_nrfifos;
53	u16			tx_fifosize;
54	smc_t __iomem		*smcp;
55	smc_uart_t __iomem	*smcup;
56	scc_t __iomem		*sccp;
57	scc_uart_t __iomem	*sccup;
58	cbd_t __iomem		*rx_bd_base;
59	cbd_t __iomem		*rx_cur;
60	cbd_t __iomem		*tx_bd_base;
61	cbd_t __iomem		*tx_cur;
62	unsigned char		*tx_buf;
63	unsigned char		*rx_buf;
64	u32			flags;
65	struct clk		*clk;
66	u8			brg;
67	uint			 dp_addr;
68	void			*mem_addr;
69	dma_addr_t		 dma_addr;
70	u32			mem_size;
71	/* wait on close if needed */
72	int			wait_closing;
73	/* value to combine with opcode to form cpm command */
74	u32			command;
75	struct gpio_desc	*gpios[NUM_GPIOS];
76};
77
78/*
79   virtual to phys transtalion
80*/
81static inline unsigned long cpu2cpm_addr(void *addr,
82                                         struct uart_cpm_port *pinfo)
83{
84	int offset;
85	u32 val = (u32)addr;
86	u32 mem = (u32)pinfo->mem_addr;
87	/* sane check */
88	if (likely(val >= mem && val < mem + pinfo->mem_size)) {
89		offset = val - mem;
90		return pinfo->dma_addr + offset;
91	}
92	/* something nasty happened */
93	BUG();
94	return 0;
95}
96
97static inline void *cpm2cpu_addr(unsigned long addr,
98                                 struct uart_cpm_port *pinfo)
99{
100	int offset;
101	u32 val = addr;
102	u32 dma = (u32)pinfo->dma_addr;
103	/* sane check */
104	if (likely(val >= dma && val < dma + pinfo->mem_size)) {
105		offset = val - dma;
106		return pinfo->mem_addr + offset;
107	}
108	/* something nasty happened */
109	BUG();
110	return NULL;
111}
112
113
114#endif /* CPM_UART_H */
115