| Jesper Nilsson | 77accbf | 2007-11-14 17:01:15 -0800 | [diff] [blame] | 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> |
| 13 | #include <asm/arch/io_interface_mux.h> |
| 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 { |
| 39 | int baud; |
| 40 | volatile u8 *port; /* R_SERIALx_CTRL */ |
| 41 | u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */ |
| 42 | |
| 43 | /* Output registers */ |
| 44 | volatile u8 *oclrintradr; /* adr to R_DMA_CHx_CLR_INTR */ |
| 45 | volatile u32 *ofirstadr; /* adr to R_DMA_CHx_FIRST */ |
| 46 | volatile u8 *ocmdadr; /* adr to R_DMA_CHx_CMD */ |
| 47 | const volatile u8 *ostatusadr; /* adr to R_DMA_CHx_STATUS */ |
| 48 | |
| 49 | /* Input registers */ |
| 50 | volatile u8 *iclrintradr; /* adr to R_DMA_CHx_CLR_INTR */ |
| 51 | volatile u32 *ifirstadr; /* adr to R_DMA_CHx_FIRST */ |
| 52 | volatile u8 *icmdadr; /* adr to R_DMA_CHx_CMD */ |
| 53 | volatile u32 *idescradr; /* adr to R_DMA_CHx_DESCR */ |
| 54 | |
| 55 | int flags; /* defined in tty.h */ |
| 56 | |
| 57 | u8 rx_ctrl; /* shadow for R_SERIALx_REC_CTRL */ |
| 58 | u8 tx_ctrl; /* shadow for R_SERIALx_TR_CTRL */ |
| 59 | u8 iseteop; /* bit number for R_SET_EOP for the input dma */ |
| 60 | int enabled; /* Set to 1 if the port is enabled in HW config */ |
| 61 | |
| 62 | u8 dma_out_enabled; /* Set to 1 if DMA should be used */ |
| 63 | u8 dma_in_enabled; /* Set to 1 if DMA should be used */ |
| 64 | |
| 65 | /* end of fields defined in rs_table[] in .c-file */ |
| 66 | int dma_owner; |
| 67 | unsigned int dma_in_nbr; |
| 68 | unsigned int dma_out_nbr; |
| 69 | unsigned int dma_in_irq_nbr; |
| 70 | unsigned int dma_out_irq_nbr; |
| 71 | unsigned long dma_in_irq_flags; |
| 72 | unsigned long dma_out_irq_flags; |
| 73 | char *dma_in_irq_description; |
| 74 | char *dma_out_irq_description; |
| 75 | |
| 76 | enum cris_io_interface io_if; |
| 77 | char *io_if_description; |
| 78 | |
| 79 | u8 uses_dma_in; /* Set to 1 if DMA is used */ |
| 80 | u8 uses_dma_out; /* Set to 1 if DMA is used */ |
| 81 | u8 forced_eop; /* a fifo eop has been forced */ |
| 82 | int baud_base; /* For special baudrates */ |
| 83 | int custom_divisor; /* For special baudrates */ |
| 84 | struct etrax_dma_descr tr_descr; |
| 85 | struct etrax_dma_descr rec_descr[SERIAL_RECV_DESCRIPTORS]; |
| 86 | int cur_rec_descr; |
| 87 | |
| 88 | volatile int tr_running; /* 1 if output is running */ |
| 89 | |
| 90 | struct tty_struct *tty; |
| 91 | int read_status_mask; |
| 92 | int ignore_status_mask; |
| 93 | int x_char; /* xon/xoff character */ |
| 94 | int close_delay; |
| 95 | unsigned short closing_wait; |
| 96 | unsigned short closing_wait2; |
| 97 | unsigned long event; |
| 98 | unsigned long last_active; |
| 99 | int line; |
| 100 | int type; /* PORT_ETRAX */ |
| 101 | int count; /* # of fd on device */ |
| 102 | int blocked_open; /* # of blocked opens */ |
| 103 | struct circ_buf xmit; |
| 104 | struct etrax_recv_buffer *first_recv_buffer; |
| 105 | struct etrax_recv_buffer *last_recv_buffer; |
| 106 | unsigned int recv_cnt; |
| 107 | unsigned int max_recv_cnt; |
| 108 | |
| 109 | struct work_struct work; |
| 110 | struct async_icount icount; /* error-statistics etc.*/ |
| 111 | struct ktermios normal_termios; |
| 112 | struct ktermios callout_termios; |
| 113 | wait_queue_head_t open_wait; |
| 114 | wait_queue_head_t close_wait; |
| 115 | |
| 116 | unsigned long char_time_usec; /* The time for 1 char, in usecs */ |
| 117 | unsigned long flush_time_usec; /* How often we should flush */ |
| 118 | unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */ |
| 119 | unsigned long last_tx_active; /* Last tx time in jiffies */ |
| 120 | unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */ |
| 121 | unsigned long last_rx_active; /* Last rx time in jiffies */ |
| 122 | |
| 123 | int break_detected_cnt; |
| 124 | int errorcode; |
| 125 | |
| 126 | #ifdef CONFIG_ETRAX_RS485 |
| 127 | struct rs485_control rs485; /* RS-485 support */ |
| 128 | #endif |
| 129 | }; |
| 130 | |
| 131 | /* this PORT is not in the standard serial.h. it's not actually used for |
| 132 | * anything since we only have one type of async serial-port anyway in this |
| 133 | * system. |
| 134 | */ |
| 135 | |
| 136 | #define PORT_ETRAX 1 |
| 137 | |
| 138 | /* |
| 139 | * Events are used to schedule things to happen at timer-interrupt |
| 140 | * time, instead of at rs interrupt time. |
| 141 | */ |
| 142 | #define RS_EVENT_WRITE_WAKEUP 0 |
| 143 | |
| 144 | #endif /* __KERNEL__ */ |
| 145 | |
| 146 | #endif /* !_ETRAX_SERIAL_H */ |