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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 <[email protected]>
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 */