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11#ifndef _LINUX_SERIAL_8250_H
12#define _LINUX_SERIAL_8250_H
13
14#include <linux/serial_core.h>
15#include <linux/serial_reg.h>
16#include <linux/platform_device.h>
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20
21struct plat_serial8250_port {
22 unsigned long iobase;
23 void __iomem *membase;
24 resource_size_t mapbase;
25 unsigned int irq;
26 unsigned long irqflags;
27 unsigned int uartclk;
28 void *private_data;
29 unsigned char regshift;
30 unsigned char iotype;
31 unsigned char hub6;
32 upf_t flags;
33 unsigned int type;
34 unsigned int (*serial_in)(struct uart_port *, int);
35 void (*serial_out)(struct uart_port *, int, int);
36 void (*set_termios)(struct uart_port *,
37 struct ktermios *new,
38 struct ktermios *old);
39 int (*handle_irq)(struct uart_port *);
40 void (*pm)(struct uart_port *, unsigned int state,
41 unsigned old);
42 void (*handle_break)(struct uart_port *);
43};
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48
49enum {
50 PLAT8250_DEV_LEGACY = -1,
51 PLAT8250_DEV_PLATFORM,
52 PLAT8250_DEV_PLATFORM1,
53 PLAT8250_DEV_PLATFORM2,
54 PLAT8250_DEV_FOURPORT,
55 PLAT8250_DEV_ACCENT,
56 PLAT8250_DEV_BOCA,
57 PLAT8250_DEV_EXAR_ST16C554,
58 PLAT8250_DEV_HUB6,
59 PLAT8250_DEV_AU1X00,
60 PLAT8250_DEV_SM501,
61};
62
63struct uart_8250_dma;
64struct uart_8250_port;
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74struct uart_8250_ops {
75 int (*setup_irq)(struct uart_8250_port *);
76 void (*release_irq)(struct uart_8250_port *);
77};
78
79struct uart_8250_em485 {
80 struct timer_list start_tx_timer;
81 struct timer_list stop_tx_timer;
82 struct timer_list *active_timer;
83};
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92struct uart_8250_port {
93 struct uart_port port;
94 struct timer_list timer;
95 struct list_head list;
96 unsigned short capabilities;
97 unsigned short bugs;
98 bool fifo_bug;
99 unsigned int tx_loadsz;
100 unsigned char acr;
101 unsigned char fcr;
102 unsigned char ier;
103 unsigned char lcr;
104 unsigned char mcr;
105 unsigned char mcr_mask;
106 unsigned char mcr_force;
107 unsigned char cur_iotype;
108 unsigned int rpm_tx_active;
109 unsigned char canary;
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111
112 unsigned char probe;
113#define UART_PROBE_RSA (1 << 0)
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119
120#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS
121 unsigned char lsr_saved_flags;
122#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
123 unsigned char msr_saved_flags;
124
125 struct uart_8250_dma *dma;
126 const struct uart_8250_ops *ops;
127
128
129 int (*dl_read)(struct uart_8250_port *);
130 void (*dl_write)(struct uart_8250_port *, int);
131
132 struct uart_8250_em485 *em485;
133};
134
135static inline struct uart_8250_port *up_to_u8250p(struct uart_port *up)
136{
137 return container_of(up, struct uart_8250_port, port);
138}
139
140int serial8250_register_8250_port(struct uart_8250_port *);
141void serial8250_unregister_port(int line);
142void serial8250_suspend_port(int line);
143void serial8250_resume_port(int line);
144
145extern int early_serial_setup(struct uart_port *port);
146
147extern int early_serial8250_setup(struct earlycon_device *device,
148 const char *options);
149extern void serial8250_do_set_termios(struct uart_port *port,
150 struct ktermios *termios, struct ktermios *old);
151extern int serial8250_do_startup(struct uart_port *port);
152extern void serial8250_do_shutdown(struct uart_port *port);
153extern void serial8250_do_pm(struct uart_port *port, unsigned int state,
154 unsigned int oldstate);
155extern void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl);
156extern int fsl8250_handle_irq(struct uart_port *port);
157int serial8250_handle_irq(struct uart_port *port, unsigned int iir);
158unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr);
159void serial8250_tx_chars(struct uart_8250_port *up);
160unsigned int serial8250_modem_status(struct uart_8250_port *up);
161void serial8250_init_port(struct uart_8250_port *up);
162void serial8250_set_defaults(struct uart_8250_port *up);
163void serial8250_console_write(struct uart_8250_port *up, const char *s,
164 unsigned int count);
165int serial8250_console_setup(struct uart_port *port, char *options, bool probe);
166
167extern void serial8250_set_isa_configurator(void (*v)
168 (int port, struct uart_port *up,
169 unsigned short *capabilities));
170
171#endif
172