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1 | /* |
2 | * linux/include/linux/serial_8250.h |
3 | * |
4 | * Copyright (C) 2004 Russell King |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | */ |
11 | #ifndef _LINUX_SERIAL_8250_H |
12 | #define _LINUX_SERIAL_8250_H |
13 | |
14 | #include <linux/serial_core.h> |
15 | #include <linux/platform_device.h> |
16 | |
17 | /* |
18 | * This is the platform device platform_data structure |
19 | */ |
20 | struct plat_serial8250_port { |
21 | unsigned long iobase; /* io base address */ |
22 | void __iomem *membase; /* ioremap cookie or NULL */ |
23 | resource_size_t mapbase; /* resource base */ |
24 | unsigned int irq; /* interrupt number */ |
25 | unsigned long irqflags; /* request_irq flags */ |
26 | unsigned int uartclk; /* UART clock rate */ |
27 | void *private_data; |
28 | unsigned char regshift; /* register shift */ |
29 | unsigned char iotype; /* UPIO_* */ |
30 | unsigned char hub6; |
31 | upf_t flags; /* UPF_* flags */ |
32 | unsigned int type; /* If UPF_FIXED_TYPE */ |
33 | unsigned int (*serial_in)(struct uart_port *, int); |
34 | void (*serial_out)(struct uart_port *, int, int); |
35 | void (*set_termios)(struct uart_port *, |
36 | struct ktermios *new, |
37 | struct ktermios *old); |
38 | int (*handle_irq)(struct uart_port *); |
39 | void (*pm)(struct uart_port *, unsigned int state, |
40 | unsigned old); |
41 | void (*handle_break)(struct uart_port *); |
42 | }; |
43 | |
44 | /* |
45 | * Allocate 8250 platform device IDs. Nothing is implied by |
46 | * the numbering here, except for the legacy entry being -1. |
47 | */ |
48 | enum { |
49 | PLAT8250_DEV_LEGACY = -1, |
50 | PLAT8250_DEV_PLATFORM, |
51 | PLAT8250_DEV_PLATFORM1, |
52 | PLAT8250_DEV_PLATFORM2, |
53 | PLAT8250_DEV_FOURPORT, |
54 | PLAT8250_DEV_ACCENT, |
55 | PLAT8250_DEV_BOCA, |
56 | PLAT8250_DEV_EXAR_ST16C554, |
57 | PLAT8250_DEV_HUB6, |
58 | PLAT8250_DEV_AU1X00, |
59 | PLAT8250_DEV_SM501, |
60 | }; |
61 | |
62 | struct uart_8250_dma; |
63 | |
64 | /* |
65 | * This should be used by drivers which want to register |
66 | * their own 8250 ports without registering their own |
67 | * platform device. Using these will make your driver |
68 | * dependent on the 8250 driver. |
69 | */ |
70 | |
71 | struct uart_8250_port { |
72 | struct uart_port port; |
73 | struct timer_list timer; /* "no irq" timer */ |
74 | struct list_head list; /* ports on this IRQ */ |
75 | unsigned short capabilities; /* port capabilities */ |
76 | unsigned short bugs; /* port bugs */ |
77 | unsigned int tx_loadsz; /* transmit fifo load size */ |
78 | unsigned char acr; |
79 | unsigned char ier; |
80 | unsigned char lcr; |
81 | unsigned char mcr; |
82 | unsigned char mcr_mask; /* mask of user bits */ |
83 | unsigned char mcr_force; /* mask of forced bits */ |
84 | unsigned char cur_iotype; /* Running I/O type */ |
85 | |
86 | /* |
87 | * Some bits in registers are cleared on a read, so they must |
88 | * be saved whenever the register is read but the bits will not |
89 | * be immediately processed. |
90 | */ |
91 | #define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS |
92 | unsigned char lsr_saved_flags; |
93 | #define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA |
94 | unsigned char msr_saved_flags; |
95 | |
96 | struct uart_8250_dma *dma; |
97 | |
98 | /* 8250 specific callbacks */ |
99 | int (*dl_read)(struct uart_8250_port *); |
100 | void (*dl_write)(struct uart_8250_port *, int); |
101 | }; |
102 | |
103 | int serial8250_register_8250_port(struct uart_8250_port *); |
104 | void serial8250_unregister_port(int line); |
105 | void serial8250_suspend_port(int line); |
106 | void serial8250_resume_port(int line); |
107 | |
108 | extern int early_serial_setup(struct uart_port *port); |
109 | |
110 | extern int serial8250_find_port(struct uart_port *p); |
111 | extern int serial8250_find_port_for_earlycon(void); |
112 | extern unsigned int serial8250_early_in(struct uart_port *port, int offset); |
113 | extern void serial8250_early_out(struct uart_port *port, int offset, int value); |
114 | extern int setup_early_serial8250_console(char *cmdline); |
115 | extern void serial8250_do_set_termios(struct uart_port *port, |
116 | struct ktermios *termios, struct ktermios *old); |
117 | extern void serial8250_do_pm(struct uart_port *port, unsigned int state, |
118 | unsigned int oldstate); |
119 | extern int fsl8250_handle_irq(struct uart_port *port); |
120 | int serial8250_handle_irq(struct uart_port *port, unsigned int iir); |
121 | unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr); |
122 | void serial8250_tx_chars(struct uart_8250_port *up); |
123 | unsigned int serial8250_modem_status(struct uart_8250_port *up); |
124 | |
125 | extern void serial8250_set_isa_configurator(void (*v) |
126 | (int port, struct uart_port *up, |
127 | unsigned short *capabilities)); |
128 | |
129 | #endif |
130 |
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