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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 |