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77accbf5 JN |
1 | /* |
2 | * serial.h: Arch-dep definitions for the Etrax100 serial driver. | |
3 | * | |
4 | * Copyright (C) 1998-2007 Axis Communications AB | |
5 | */ | |
6 | ||
7 | #ifndef _ETRAX_SERIAL_H | |
8 | #define _ETRAX_SERIAL_H | |
9 | ||
10 | #include <linux/circ_buf.h> | |
11 | #include <asm/termios.h> | |
12 | #include <asm/dma.h> | |
556dcee7 | 13 | #include <arch/io_interface_mux.h> |
77accbf5 JN |
14 | |
15 | /* Software state per channel */ | |
16 | ||
17 | #ifdef __KERNEL__ | |
18 | /* | |
19 | * This is our internal structure for each serial port's state. | |
20 | * | |
21 | * Many fields are paralleled by the structure used by the serial_struct | |
22 | * structure. | |
23 | * | |
24 | * For definitions of the flags field, see tty.h | |
25 | */ | |
26 | ||
27 | #define SERIAL_RECV_DESCRIPTORS 8 | |
28 | ||
29 | struct etrax_recv_buffer { | |
30 | struct etrax_recv_buffer *next; | |
31 | unsigned short length; | |
32 | unsigned char error; | |
33 | unsigned char pad; | |
34 | ||
35 | unsigned char buffer[0]; | |
36 | }; | |
37 | ||
38 | struct e100_serial { | |
d7283353 | 39 | struct tty_port port; |
77accbf5 | 40 | int baud; |
d7283353 | 41 | volatile u8 *ioport; /* R_SERIALx_CTRL */ |
77accbf5 JN |
42 | u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */ |
43 | ||
44 | /* Output registers */ | |
45 | volatile u8 *oclrintradr; /* adr to R_DMA_CHx_CLR_INTR */ | |
46 | volatile u32 *ofirstadr; /* adr to R_DMA_CHx_FIRST */ | |
47 | volatile u8 *ocmdadr; /* adr to R_DMA_CHx_CMD */ | |
48 | const volatile u8 *ostatusadr; /* adr to R_DMA_CHx_STATUS */ | |
49 | ||
50 | /* Input registers */ | |
51 | volatile u8 *iclrintradr; /* adr to R_DMA_CHx_CLR_INTR */ | |
52 | volatile u32 *ifirstadr; /* adr to R_DMA_CHx_FIRST */ | |
53 | volatile u8 *icmdadr; /* adr to R_DMA_CHx_CMD */ | |
54 | volatile u32 *idescradr; /* adr to R_DMA_CHx_DESCR */ | |
55 | ||
77accbf5 JN |
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; /* Set to 1 if DMA should be used */ | |
62 | u8 dma_in_enabled; /* Set to 1 if DMA should be used */ | |
63 | ||
64 | /* end of fields defined in rs_table[] in .c-file */ | |
65 | int dma_owner; | |
66 | unsigned int dma_in_nbr; | |
67 | unsigned int dma_out_nbr; | |
68 | unsigned int dma_in_irq_nbr; | |
69 | unsigned int dma_out_irq_nbr; | |
70 | unsigned long dma_in_irq_flags; | |
71 | unsigned long dma_out_irq_flags; | |
72 | char *dma_in_irq_description; | |
73 | char *dma_out_irq_description; | |
74 | ||
75 | enum cris_io_interface io_if; | |
76 | char *io_if_description; | |
77 | ||
78 | u8 uses_dma_in; /* Set to 1 if DMA is used */ | |
79 | u8 uses_dma_out; /* Set to 1 if DMA is used */ | |
80 | u8 forced_eop; /* a fifo eop has been forced */ | |
81 | int baud_base; /* For special baudrates */ | |
82 | int custom_divisor; /* For special baudrates */ | |
83 | struct etrax_dma_descr tr_descr; | |
84 | struct etrax_dma_descr rec_descr[SERIAL_RECV_DESCRIPTORS]; | |
85 | int cur_rec_descr; | |
86 | ||
87 | volatile int tr_running; /* 1 if output is running */ | |
88 | ||
77accbf5 | 89 | int x_char; /* xon/xoff character */ |
77accbf5 | 90 | unsigned long event; |
77accbf5 JN |
91 | int line; |
92 | int type; /* PORT_ETRAX */ | |
77accbf5 JN |
93 | struct circ_buf xmit; |
94 | struct etrax_recv_buffer *first_recv_buffer; | |
95 | struct etrax_recv_buffer *last_recv_buffer; | |
96 | unsigned int recv_cnt; | |
97 | unsigned int max_recv_cnt; | |
98 | ||
99 | struct work_struct work; | |
100 | struct async_icount icount; /* error-statistics etc.*/ | |
77accbf5 JN |
101 | |
102 | unsigned long char_time_usec; /* The time for 1 char, in usecs */ | |
103 | unsigned long flush_time_usec; /* How often we should flush */ | |
104 | unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */ | |
105 | unsigned long last_tx_active; /* Last tx time in jiffies */ | |
106 | unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */ | |
107 | unsigned long last_rx_active; /* Last rx time in jiffies */ | |
108 | ||
109 | int break_detected_cnt; | |
110 | int errorcode; | |
111 | ||
112 | #ifdef CONFIG_ETRAX_RS485 | |
6fd1af4c | 113 | struct serial_rs485 rs485; /* RS-485 support */ |
77accbf5 JN |
114 | #endif |
115 | }; | |
116 | ||
117 | /* this PORT is not in the standard serial.h. it's not actually used for | |
118 | * anything since we only have one type of async serial-port anyway in this | |
119 | * system. | |
120 | */ | |
121 | ||
122 | #define PORT_ETRAX 1 | |
123 | ||
124 | /* | |
125 | * Events are used to schedule things to happen at timer-interrupt | |
126 | * time, instead of at rs interrupt time. | |
127 | */ | |
128 | #define RS_EVENT_WRITE_WAKEUP 0 | |
129 | ||
130 | #endif /* __KERNEL__ */ | |
131 | ||
132 | #endif /* !_ETRAX_SERIAL_H */ |