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7#ifndef _LINUX_SERIAL_8250_H
8#define _LINUX_SERIAL_8250_H
9
10#include <linux/serial_core.h>
11#include <linux/serial_reg.h>
12#include <linux/platform_device.h>
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16
17struct plat_serial8250_port {
18 unsigned long iobase;
19 void __iomem *membase;
20 resource_size_t mapbase;
21 unsigned int irq;
22 unsigned long irqflags;
23 unsigned int uartclk;
24 void *private_data;
25 unsigned char regshift;
26 unsigned char iotype;
27 unsigned char hub6;
28 unsigned char has_sysrq;
29 upf_t flags;
30 unsigned int type;
31 unsigned int (*serial_in)(struct uart_port *, int);
32 void (*serial_out)(struct uart_port *, int, int);
33 void (*set_termios)(struct uart_port *,
34 struct ktermios *new,
35 struct ktermios *old);
36 void (*set_ldisc)(struct uart_port *,
37 struct ktermios *);
38 unsigned int (*get_mctrl)(struct uart_port *);
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 hrtimer start_tx_timer;
81 struct hrtimer stop_tx_timer;
82 struct hrtimer *active_timer;
83 struct uart_8250_port *port;
84 unsigned int tx_stopped:1;
85};
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94struct uart_8250_port {
95 struct uart_port port;
96 struct timer_list timer;
97 struct list_head list;
98 u32 capabilities;
99 unsigned short bugs;
100 bool fifo_bug;
101 unsigned int tx_loadsz;
102 unsigned char acr;
103 unsigned char fcr;
104 unsigned char ier;
105 unsigned char lcr;
106 unsigned char mcr;
107 unsigned char mcr_mask;
108 unsigned char mcr_force;
109 unsigned char cur_iotype;
110 unsigned int rpm_tx_active;
111 unsigned char canary;
112
113
114 unsigned char probe;
115 struct mctrl_gpios *gpios;
116#define UART_PROBE_RSA (1 << 0)
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122
123#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS
124 unsigned char lsr_saved_flags;
125#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
126 unsigned char msr_saved_flags;
127
128 struct uart_8250_dma *dma;
129 const struct uart_8250_ops *ops;
130
131
132 int (*dl_read)(struct uart_8250_port *);
133 void (*dl_write)(struct uart_8250_port *, int);
134
135 struct uart_8250_em485 *em485;
136 void (*rs485_start_tx)(struct uart_8250_port *);
137 void (*rs485_stop_tx)(struct uart_8250_port *);
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139
140 struct delayed_work overrun_backoff;
141 u32 overrun_backoff_time_ms;
142};
143
144static inline struct uart_8250_port *up_to_u8250p(struct uart_port *up)
145{
146 return container_of(up, struct uart_8250_port, port);
147}
148
149int serial8250_register_8250_port(struct uart_8250_port *);
150void serial8250_unregister_port(int line);
151void serial8250_suspend_port(int line);
152void serial8250_resume_port(int line);
153
154extern int early_serial_setup(struct uart_port *port);
155
156extern int early_serial8250_setup(struct earlycon_device *device,
157 const char *options);
158extern void serial8250_update_uartclk(struct uart_port *port,
159 unsigned int uartclk);
160extern void serial8250_do_set_termios(struct uart_port *port,
161 struct ktermios *termios, struct ktermios *old);
162extern void serial8250_do_set_ldisc(struct uart_port *port,
163 struct ktermios *termios);
164extern unsigned int serial8250_do_get_mctrl(struct uart_port *port);
165extern int serial8250_do_startup(struct uart_port *port);
166extern void serial8250_do_shutdown(struct uart_port *port);
167extern void serial8250_do_pm(struct uart_port *port, unsigned int state,
168 unsigned int oldstate);
169extern void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl);
170extern void serial8250_do_set_divisor(struct uart_port *port, unsigned int baud,
171 unsigned int quot,
172 unsigned int quot_frac);
173extern int fsl8250_handle_irq(struct uart_port *port);
174int serial8250_handle_irq(struct uart_port *port, unsigned int iir);
175unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr);
176void serial8250_read_char(struct uart_8250_port *up, unsigned char lsr);
177void serial8250_tx_chars(struct uart_8250_port *up);
178unsigned int serial8250_modem_status(struct uart_8250_port *up);
179void serial8250_init_port(struct uart_8250_port *up);
180void serial8250_set_defaults(struct uart_8250_port *up);
181void serial8250_console_write(struct uart_8250_port *up, const char *s,
182 unsigned int count);
183int serial8250_console_setup(struct uart_port *port, char *options, bool probe);
184int serial8250_console_exit(struct uart_port *port);
185
186extern void serial8250_set_isa_configurator(void (*v)
187 (int port, struct uart_port *up,
188 u32 *capabilities));
189
190#endif
191