aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/serial/crisv10.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/serial/crisv10.h')
-rw-r--r--drivers/serial/crisv10.h137
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/serial/crisv10.h b/drivers/serial/crisv10.h
new file mode 100644
index 000000000000..1800c0e7531a
--- /dev/null
+++ b/drivers/serial/crisv10.h
@@ -0,0 +1,137 @@
1/*
2 * serial.h: Arch-dep definitions for the Etrax100 serial driver.
3 *
4 * Copyright (C) 1998, 1999, 2000 Axis Communications AB
5 */
6
7#ifndef _ETRAX_SERIAL_H
8#define _ETRAX_SERIAL_H
9
10#include <linux/config.h>
11#include <linux/circ_buf.h>
12#include <asm/termios.h>
13
14/* Software state per channel */
15
16#ifdef __KERNEL__
17/*
18 * This is our internal structure for each serial port's state.
19 *
20 * Many fields are paralleled by the structure used by the serial_struct
21 * structure.
22 *
23 * For definitions of the flags field, see tty.h
24 */
25
26#define SERIAL_RECV_DESCRIPTORS 8
27
28struct etrax_recv_buffer {
29 struct etrax_recv_buffer *next;
30 unsigned short length;
31 unsigned char error;
32 unsigned char pad;
33
34 unsigned char buffer[0];
35};
36
37struct e100_serial {
38 int baud;
39 volatile u8 *port; /* R_SERIALx_CTRL */
40 u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */
41
42 /* Output registers */
43 volatile u8 *oclrintradr; /* adr to R_DMA_CHx_CLR_INTR */
44 volatile u32 *ofirstadr; /* adr to R_DMA_CHx_FIRST */
45 volatile u8 *ocmdadr; /* adr to R_DMA_CHx_CMD */
46 const volatile u8 *ostatusadr; /* adr to R_DMA_CHx_STATUS */
47
48 /* Input registers */
49 volatile u8 *iclrintradr; /* adr to R_DMA_CHx_CLR_INTR */
50 volatile u32 *ifirstadr; /* adr to R_DMA_CHx_FIRST */
51 volatile u8 *icmdadr; /* adr to R_DMA_CHx_CMD */
52 volatile u32 *idescradr; /* adr to R_DMA_CHx_DESCR */
53
54 int flags; /* defined in tty.h */
55
56 u8 rx_ctrl; /* shadow for R_SERIALx_REC_CTRL */
57 u8 tx_ctrl; /* shadow for R_SERIALx_TR_CTRL */
58 u8 iseteop; /* bit number for R_SET_EOP for the input dma */
59 int enabled; /* Set to 1 if the port is enabled in HW config */
60
61 u8 dma_out_enabled:1; /* Set to 1 if DMA should be used */
62 u8 dma_in_enabled:1; /* Set to 1 if DMA should be used */
63
64 /* end of fields defined in rs_table[] in .c-file */
65 u8 uses_dma_in; /* Set to 1 if DMA is used */
66 u8 uses_dma_out; /* Set to 1 if DMA is used */
67 u8 forced_eop; /* a fifo eop has been forced */
68 int baud_base; /* For special baudrates */
69 int custom_divisor; /* For special baudrates */
70 struct etrax_dma_descr tr_descr;
71 struct etrax_dma_descr rec_descr[SERIAL_RECV_DESCRIPTORS];
72 int cur_rec_descr;
73
74 volatile int tr_running; /* 1 if output is running */
75
76 struct tty_struct *tty;
77 int read_status_mask;
78 int ignore_status_mask;
79 int x_char; /* xon/xoff character */
80 int close_delay;
81 unsigned short closing_wait;
82 unsigned short closing_wait2;
83 unsigned long event;
84 unsigned long last_active;
85 int line;
86 int type; /* PORT_ETRAX */
87 int count; /* # of fd on device */
88 int blocked_open; /* # of blocked opens */
89 struct circ_buf xmit;
90 struct etrax_recv_buffer *first_recv_buffer;
91 struct etrax_recv_buffer *last_recv_buffer;
92 unsigned int recv_cnt;
93 unsigned int max_recv_cnt;
94
95 struct work_struct work;
96 struct async_icount icount; /* error-statistics etc.*/
97 struct termios normal_termios;
98 struct termios callout_termios;
99#ifdef DECLARE_WAITQUEUE
100 wait_queue_head_t open_wait;
101 wait_queue_head_t close_wait;
102#else
103 struct wait_queue *open_wait;
104 struct wait_queue *close_wait;
105#endif
106
107 unsigned long char_time_usec; /* The time for 1 char, in usecs */
108 unsigned long flush_time_usec; /* How often we should flush */
109 unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */
110 unsigned long last_tx_active; /* Last tx time in jiffies */
111 unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */
112 unsigned long last_rx_active; /* Last rx time in jiffies */
113
114 int break_detected_cnt;
115 int errorcode;
116
117#ifdef CONFIG_ETRAX_RS485
118 struct rs485_control rs485; /* RS-485 support */
119#endif
120};
121
122/* this PORT is not in the standard serial.h. it's not actually used for
123 * anything since we only have one type of async serial-port anyway in this
124 * system.
125 */
126
127#define PORT_ETRAX 1
128
129/*
130 * Events are used to schedule things to happen at timer-interrupt
131 * time, instead of at rs interrupt time.
132 */
133#define RS_EVENT_WRITE_WAKEUP 0
134
135#endif /* __KERNEL__ */
136
137#endif /* !_ETRAX_SERIAL_H */