blob: 7146ed29d5081e5ea29db4ae25770e2f90ccc75a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/*
* serial.h: Arch-dep definitions for the Etrax100 serial driver.
*
* Copyright (C) 1998-2007 Axis Communications AB
*/
#ifndef _ETRAX_SERIAL_H
#define _ETRAX_SERIAL_H
#include <linux/circ_buf.h>
#include <asm/termios.h>
#include <asm/dma.h>
#include <arch/io_interface_mux.h>
/* Software state per channel */
#ifdef __KERNEL__
/*
* This is our internal structure for each serial port's state.
*
* Many fields are paralleled by the structure used by the serial_struct
* structure.
*
* For definitions of the flags field, see tty.h
*/
#define SERIAL_RECV_DESCRIPTORS 8
struct etrax_recv_buffer {
struct etrax_recv_buffer *next;
unsigned short length;
unsigned char error;
unsigned char pad;
unsigned char buffer[0];
};
struct e100_serial {
struct tty_port port;
int baud;
volatile u8 *ioport; /* R_SERIALx_CTRL */
u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */
/* Output registers */
volatile u8 *oclrintradr; /* adr to R_DMA_CHx_CLR_INTR */
volatile u32 *ofirstadr; /* adr to R_DMA_CHx_FIRST */
volatile u8 *ocmdadr; /* adr to R_DMA_CHx_CMD */
const volatile u8 *ostatusadr; /* adr to R_DMA_CHx_STATUS */
/* Input registers */
volatile u8 *iclrintradr; /* adr to R_DMA_CHx_CLR_INTR */
volatile u32 *ifirstadr; /* adr to R_DMA_CHx_FIRST */
volatile u8 *icmdadr; /* adr to R_DMA_CHx_CMD */
volatile u32 *idescradr; /* adr to R_DMA_CHx_DESCR */
u8 rx_ctrl; /* shadow for R_SERIALx_REC_CTRL */
u8 tx_ctrl; /* shadow for R_SERIALx_TR_CTRL */
u8 iseteop; /* bit number for R_SET_EOP for the input dma */
int enabled; /* Set to 1 if the port is enabled in HW config */
u8 dma_out_enabled; /* Set to 1 if DMA should be used */
u8 dma_in_enabled; /* Set to 1 if DMA should be used */
/* end of fields defined in rs_table[] in .c-file */
int dma_owner;
unsigned int dma_in_nbr;
unsigned int dma_out_nbr;
unsigned int dma_in_irq_nbr;
unsigned int dma_out_irq_nbr;
unsigned long dma_in_irq_flags;
unsigned long dma_out_irq_flags;
char *dma_in_irq_description;
char *dma_out_irq_description;
enum cris_io_interface io_if;
char *io_if_description;
u8 uses_dma_in; /* Set to 1 if DMA is used */
u8 uses_dma_out; /* Set to 1 if DMA is used */
u8 forced_eop; /* a fifo eop has been forced */
int baud_base; /* For special baudrates */
int custom_divisor; /* For special baudrates */
struct etrax_dma_descr tr_descr;
struct etrax_dma_descr rec_descr[SERIAL_RECV_DESCRIPTORS];
int cur_rec_descr;
volatile int tr_running; /* 1 if output is running */
struct tty_struct *tty;
int read_status_mask;
int ignore_status_mask;
int x_char; /* xon/xoff character */
int close_delay;
unsigned short closing_wait;
unsigned short closing_wait2;
unsigned long event;
unsigned long last_active;
int line;
int type; /* PORT_ETRAX */
int count; /* # of fd on device */
int blocked_open; /* # of blocked opens */
struct circ_buf xmit;
struct etrax_recv_buffer *first_recv_buffer;
struct etrax_recv_buffer *last_recv_buffer;
unsigned int recv_cnt;
unsigned int max_recv_cnt;
struct work_struct work;
struct async_icount icount; /* error-statistics etc.*/
struct ktermios normal_termios;
struct ktermios callout_termios;
wait_queue_head_t open_wait;
wait_queue_head_t close_wait;
unsigned long char_time_usec; /* The time for 1 char, in usecs */
unsigned long flush_time_usec; /* How often we should flush */
unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */
unsigned long last_tx_active; /* Last tx time in jiffies */
unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */
unsigned long last_rx_active; /* Last rx time in jiffies */
int break_detected_cnt;
int errorcode;
#ifdef CONFIG_ETRAX_RS485
struct serial_rs485 rs485; /* RS-485 support */
#endif
};
/* this PORT is not in the standard serial.h. it's not actually used for
* anything since we only have one type of async serial-port anyway in this
* system.
*/
#define PORT_ETRAX 1
/*
* Events are used to schedule things to happen at timer-interrupt
* time, instead of at rs interrupt time.
*/
#define RS_EVENT_WRITE_WAKEUP 0
#endif /* __KERNEL__ */
#endif /* !_ETRAX_SERIAL_H */
|
