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 | |
15 | struct 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 | |
48 | struct 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 | */ |
81 | static 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 | |
97 | static 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 | |