projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 | ||
| 28 | struct 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 | ||
| 37 | struct 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 */ |