Commit | Line | Data |
---|---|---|
e3b3d0f5 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | /* |
1da177e4 LT |
3 | * Driver for CPM (SCC/SMC) serial ports |
4 | * | |
5 | * Copyright (C) 2004 Freescale Semiconductor, Inc. | |
6 | * | |
6e197696 | 7 | * 2006 (c) MontaVista Software, Inc. |
0d844065 | 8 | * Vitaly Bordug <vbordug@ru.mvista.com> |
6e197696 VB |
9 | * |
10 | * This file is licensed under the terms of the GNU General Public License | |
11 | * version 2. This program is licensed "as is" without any warranty of any | |
12 | * kind, whether express or implied. | |
13 | * | |
1da177e4 LT |
14 | */ |
15 | #ifndef CPM_UART_H | |
16 | #define CPM_UART_H | |
17 | ||
e27987cd VB |
18 | #include <linux/platform_device.h> |
19 | #include <linux/fs_uart_pd.h> | |
1da177e4 LT |
20 | |
21 | #if defined(CONFIG_CPM2) | |
22 | #include "cpm_uart_cpm2.h" | |
49708c9e | 23 | #elif defined(CONFIG_CPM1) |
1da177e4 LT |
24 | #include "cpm_uart_cpm1.h" |
25 | #endif | |
26 | ||
27 | #define SERIAL_CPM_MAJOR 204 | |
28 | #define SERIAL_CPM_MINOR 46 | |
29 | ||
0d844065 | 30 | #define IS_SMC(pinfo) (pinfo->flags & FLAG_SMC) |
1da177e4 LT |
31 | #define IS_DISCARDING(pinfo) (pinfo->flags & FLAG_DISCARDING) |
32 | #define FLAG_DISCARDING 0x00000004 /* when set, don't discard */ | |
33 | #define FLAG_SMC 0x00000002 | |
34 | #define FLAG_CONSOLE 0x00000001 | |
35 | ||
e27987cd VB |
36 | #define UART_SMC1 fsid_smc1_uart |
37 | #define UART_SMC2 fsid_smc2_uart | |
38 | #define UART_SCC1 fsid_scc1_uart | |
39 | #define UART_SCC2 fsid_scc2_uart | |
40 | #define UART_SCC3 fsid_scc3_uart | |
41 | #define UART_SCC4 fsid_scc4_uart | |
1da177e4 | 42 | |
e27987cd | 43 | #define UART_NR fs_uart_nr |
1da177e4 LT |
44 | |
45 | #define RX_NUM_FIFO 4 | |
46 | #define RX_BUF_SIZE 32 | |
47 | #define TX_NUM_FIFO 4 | |
48 | #define TX_BUF_SIZE 32 | |
49 | ||
311c4627 KG |
50 | #define SCC_WAIT_CLOSING 100 |
51 | ||
7485d26b LP |
52 | #define GPIO_CTS 0 |
53 | #define GPIO_RTS 1 | |
54 | #define GPIO_DCD 2 | |
55 | #define GPIO_DSR 3 | |
56 | #define GPIO_DTR 4 | |
57 | #define GPIO_RI 5 | |
58 | ||
59 | #define NUM_GPIOS (GPIO_RI+1) | |
60 | ||
1da177e4 LT |
61 | struct uart_cpm_port { |
62 | struct uart_port port; | |
311c4627 | 63 | u16 rx_nrfifos; |
1da177e4 | 64 | u16 rx_fifosize; |
311c4627 | 65 | u16 tx_nrfifos; |
1da177e4 | 66 | u16 tx_fifosize; |
c1dcfd9d SW |
67 | smc_t __iomem *smcp; |
68 | smc_uart_t __iomem *smcup; | |
69 | scc_t __iomem *sccp; | |
70 | scc_uart_t __iomem *sccup; | |
71 | cbd_t __iomem *rx_bd_base; | |
72 | cbd_t __iomem *rx_cur; | |
73 | cbd_t __iomem *tx_bd_base; | |
74 | cbd_t __iomem *tx_cur; | |
1da177e4 LT |
75 | unsigned char *tx_buf; |
76 | unsigned char *rx_buf; | |
77 | u32 flags; | |
80776554 | 78 | struct clk *clk; |
1da177e4 LT |
79 | u8 brg; |
80 | uint dp_addr; | |
0d844065 | 81 | void *mem_addr; |
1da177e4 | 82 | dma_addr_t dma_addr; |
09b03b6c | 83 | u32 mem_size; |
311c4627 | 84 | /* wait on close if needed */ |
0d844065 | 85 | int wait_closing; |
7ae87036 SW |
86 | /* value to combine with opcode to form cpm command */ |
87 | u32 command; | |
7485d26b | 88 | int gpios[NUM_GPIOS]; |
1da177e4 LT |
89 | }; |
90 | ||
1da177e4 LT |
91 | extern int cpm_uart_nr; |
92 | extern struct uart_cpm_port cpm_uart_ports[UART_NR]; | |
93 | ||
94 | /* these are located in their respective files */ | |
7ae87036 | 95 | void cpm_line_cr_cmd(struct uart_cpm_port *port, int cmd); |
d464df26 LP |
96 | void __iomem *cpm_uart_map_pram(struct uart_cpm_port *port, |
97 | struct device_node *np); | |
98 | void cpm_uart_unmap_pram(struct uart_cpm_port *port, void __iomem *pram); | |
32a56ebb | 99 | int cpm_uart_init_portdesc(void); |
1da177e4 LT |
100 | int cpm_uart_allocbuf(struct uart_cpm_port *pinfo, unsigned int is_con); |
101 | void cpm_uart_freebuf(struct uart_cpm_port *pinfo); | |
102 | ||
103 | void smc1_lineif(struct uart_cpm_port *pinfo); | |
104 | void smc2_lineif(struct uart_cpm_port *pinfo); | |
105 | void scc1_lineif(struct uart_cpm_port *pinfo); | |
106 | void scc2_lineif(struct uart_cpm_port *pinfo); | |
107 | void scc3_lineif(struct uart_cpm_port *pinfo); | |
108 | void scc4_lineif(struct uart_cpm_port *pinfo); | |
109 | ||
09b03b6c VB |
110 | /* |
111 | virtual to phys transtalion | |
112 | */ | |
c1dcfd9d SW |
113 | static inline unsigned long cpu2cpm_addr(void *addr, |
114 | struct uart_cpm_port *pinfo) | |
09b03b6c VB |
115 | { |
116 | int offset; | |
117 | u32 val = (u32)addr; | |
c1dcfd9d | 118 | u32 mem = (u32)pinfo->mem_addr; |
09b03b6c | 119 | /* sane check */ |
c1dcfd9d SW |
120 | if (likely(val >= mem && val < mem + pinfo->mem_size)) { |
121 | offset = val - mem; | |
122 | return pinfo->dma_addr + offset; | |
09b03b6c | 123 | } |
6e197696 VB |
124 | /* something nasty happened */ |
125 | BUG(); | |
09b03b6c VB |
126 | return 0; |
127 | } | |
128 | ||
c1dcfd9d SW |
129 | static inline void *cpm2cpu_addr(unsigned long addr, |
130 | struct uart_cpm_port *pinfo) | |
09b03b6c VB |
131 | { |
132 | int offset; | |
133 | u32 val = addr; | |
c1dcfd9d | 134 | u32 dma = (u32)pinfo->dma_addr; |
09b03b6c | 135 | /* sane check */ |
c1dcfd9d SW |
136 | if (likely(val >= dma && val < dma + pinfo->mem_size)) { |
137 | offset = val - dma; | |
138 | return pinfo->mem_addr + offset; | |
09b03b6c | 139 | } |
6e197696 VB |
140 | /* something nasty happened */ |
141 | BUG(); | |
c1dcfd9d | 142 | return NULL; |
09b03b6c VB |
143 | } |
144 | ||
145 | ||
1da177e4 | 146 | #endif /* CPM_UART_H */ |