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 */