projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 77accbf5 JN |
2 | /* |
| 3 | * serial.h: Arch-dep definitions for the Etrax100 serial driver. | |
| 4 | * | |
| 5 | * Copyright (C) 1998-2007 Axis Communications AB | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef _ETRAX_SERIAL_H | |
| 9 | #define _ETRAX_SERIAL_H | |
| 10 | ||
| 11 | #include <linux/circ_buf.h> | |
| 12 | #include <asm/termios.h> | |
| 13 | #include <asm/dma.h> | |
| 556dcee7 | 14 | #include <arch/io_interface_mux.h> |
| 77accbf5 JN |
15 | |
| 16 | /* Software state per channel */ | |
| 17 | ||
| 18 | #ifdef __KERNEL__ | |
| 19 | /* | |
| 20 | * This is our internal structure for each serial port's state. | |
| 21 | * | |
| 22 | * Many fields are paralleled by the structure used by the serial_struct | |
| 23 | * structure. | |
| 24 | * | |
| 25 | * For definitions of the flags field, see tty.h | |
| 26 | */ | |
| 27 | ||
| 28 | #define SERIAL_RECV_DESCRIPTORS 8 | |
| 29 | ||
| 30 | struct etrax_recv_buffer { | |
| 31 | struct etrax_recv_buffer *next; | |
| 32 | unsigned short length; | |
| 33 | unsigned char error; | |
| 34 | unsigned char pad; | |
| 35 | ||
| 36 | unsigned char buffer[0]; | |
| 37 | }; | |
| 38 | ||
| 39 | struct e100_serial { | |
| d7283353 | 40 | struct tty_port port; |
| 77accbf5 | 41 | int baud; |
| d7283353 | 42 | volatile u8 *ioport; /* R_SERIALx_CTRL */ |
| 77accbf5 JN |
43 | u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */ |
| 44 | ||
| 45 | /* Output registers */ | |
| 46 | volatile u8 *oclrintradr; /* adr to R_DMA_CHx_CLR_INTR */ | |
| 47 | volatile u32 *ofirstadr; /* adr to R_DMA_CHx_FIRST */ | |
| 48 | volatile u8 *ocmdadr; /* adr to R_DMA_CHx_CMD */ | |
| 49 | const volatile u8 *ostatusadr; /* adr to R_DMA_CHx_STATUS */ | |
| 50 | ||
| 51 | /* Input registers */ | |
| 52 | volatile u8 *iclrintradr; /* adr to R_DMA_CHx_CLR_INTR */ | |
| 53 | volatile u32 *ifirstadr; /* adr to R_DMA_CHx_FIRST */ | |
| 54 | volatile u8 *icmdadr; /* adr to R_DMA_CHx_CMD */ | |
| 55 | volatile u32 *idescradr; /* adr to R_DMA_CHx_DESCR */ | |
| 56 | ||
| 77accbf5 JN |
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 | ||
| 77accbf5 | 90 | int x_char; /* xon/xoff character */ |
| 77accbf5 | 91 | unsigned long event; |
| 77accbf5 JN |
92 | int line; |
| 93 | int type; /* PORT_ETRAX */ | |
| 77accbf5 JN |
94 | struct circ_buf xmit; |
| 95 | struct etrax_recv_buffer *first_recv_buffer; | |
| 96 | struct etrax_recv_buffer *last_recv_buffer; | |
| 97 | unsigned int recv_cnt; | |
| 98 | unsigned int max_recv_cnt; | |
| 99 | ||
| 100 | struct work_struct work; | |
| 101 | struct async_icount icount; /* error-statistics etc.*/ | |
| 77accbf5 JN |
102 | |
| 103 | unsigned long char_time_usec; /* The time for 1 char, in usecs */ | |
| 104 | unsigned long flush_time_usec; /* How often we should flush */ | |
| 105 | unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */ | |
| 106 | unsigned long last_tx_active; /* Last tx time in jiffies */ | |
| 107 | unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */ | |
| 108 | unsigned long last_rx_active; /* Last rx time in jiffies */ | |
| 109 | ||
| 110 | int break_detected_cnt; | |
| 111 | int errorcode; | |
| 112 | ||
| 113 | #ifdef CONFIG_ETRAX_RS485 | |
| 6fd1af4c | 114 | struct serial_rs485 rs485; /* RS-485 support */ |
| 77accbf5 JN |
115 | #endif |
| 116 | }; | |
| 117 | ||
| 118 | /* this PORT is not in the standard serial.h. it's not actually used for | |
| 119 | * anything since we only have one type of async serial-port anyway in this | |
| 120 | * system. | |
| 121 | */ | |
| 122 | ||
| 123 | #define PORT_ETRAX 1 | |
| 124 | ||
| 125 | /* | |
| 126 | * Events are used to schedule things to happen at timer-interrupt | |
| 127 | * time, instead of at rs interrupt time. | |
| 128 | */ | |
| 129 | #define RS_EVENT_WRITE_WAKEUP 0 | |
| 130 | ||
| 131 | #endif /* __KERNEL__ */ | |
| 132 | ||
| 133 | #endif /* !_ETRAX_SERIAL_H */ |