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422 | giacomo | 1 | /* |
2 | * Private header file for the (dumb) serial driver |
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3 | * |
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4 | * Copyright (C) 1997 by Theodore Ts'o. |
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5 | * |
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6 | * Redistribution of this file is permitted under the terms of the GNU |
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7 | * Public License (GPL) |
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8 | */ |
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9 | |||
10 | #ifndef _LINUX_SERIALP_H |
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11 | #define _LINUX_SERIALP_H |
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12 | |||
13 | /* |
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14 | * This is our internal structure for each serial port's state. |
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15 | * |
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16 | * Many fields are paralleled by the structure used by the serial_struct |
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17 | * structure. |
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18 | * |
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19 | * For definitions of the flags field, see tty.h |
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20 | */ |
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21 | |||
22 | #include <linux/version.h> |
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23 | #include <linux/config.h> |
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24 | #include <linux/termios.h> |
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25 | #include <linux/workqueue.h> |
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26 | #include <linux/interrupt.h> |
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27 | #include <linux/circ_buf.h> |
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28 | #include <linux/wait.h> |
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29 | #if (LINUX_VERSION_CODE < 0x020300) |
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30 | /* Unfortunate, but Linux 2.2 needs async_icount defined here and |
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31 | * it got moved in 2.3 */ |
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32 | #include <linux/serial.h> |
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33 | #endif |
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34 | |||
35 | struct serial_state { |
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36 | int magic; |
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37 | int baud_base; |
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38 | unsigned long port; |
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39 | int irq; |
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40 | int flags; |
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41 | int hub6; |
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42 | int type; |
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43 | int line; |
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44 | int revision; /* Chip revision (950) */ |
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45 | int xmit_fifo_size; |
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46 | int custom_divisor; |
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47 | int count; |
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48 | u8 *iomem_base; |
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49 | u16 iomem_reg_shift; |
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50 | unsigned short close_delay; |
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51 | unsigned short closing_wait; /* time to wait before closing */ |
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52 | struct async_icount icount; |
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53 | int io_type; |
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54 | struct async_struct *info; |
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55 | struct pci_dev *dev; |
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56 | }; |
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57 | |||
58 | struct async_struct { |
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59 | int magic; |
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60 | unsigned long port; |
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61 | int hub6; |
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62 | int flags; |
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63 | int xmit_fifo_size; |
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64 | struct serial_state *state; |
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65 | struct tty_struct *tty; |
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66 | int read_status_mask; |
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67 | int ignore_status_mask; |
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68 | int timeout; |
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69 | int quot; |
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70 | int x_char; /* xon/xoff character */ |
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71 | int close_delay; |
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72 | unsigned short closing_wait; |
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73 | unsigned short closing_wait2; /* obsolete */ |
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74 | int IER; /* Interrupt Enable Register */ |
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75 | int MCR; /* Modem control register */ |
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76 | int LCR; /* Line control register */ |
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77 | int ACR; /* 16950 Additional Control Reg. */ |
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78 | unsigned long event; |
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79 | unsigned long last_active; |
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80 | int line; |
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81 | int blocked_open; /* # of blocked opens */ |
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82 | struct circ_buf xmit; |
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83 | spinlock_t xmit_lock; |
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84 | u8 *iomem_base; |
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85 | u16 iomem_reg_shift; |
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86 | int io_type; |
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87 | struct work_struct work; |
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88 | struct tasklet_struct tlet; |
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89 | #ifdef DECLARE_WAITQUEUE |
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90 | wait_queue_head_t open_wait; |
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91 | wait_queue_head_t close_wait; |
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92 | wait_queue_head_t delta_msr_wait; |
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93 | #else |
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94 | struct wait_queue *open_wait; |
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95 | struct wait_queue *close_wait; |
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96 | struct wait_queue *delta_msr_wait; |
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97 | #endif |
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98 | struct async_struct *next_port; /* For the linked list */ |
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99 | struct async_struct *prev_port; |
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100 | }; |
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101 | |||
102 | #define CONFIGURED_SERIAL_PORT(info) ((info)->port || ((info)->iomem_base)) |
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103 | |||
104 | #define SERIAL_MAGIC 0x5301 |
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105 | #define SSTATE_MAGIC 0x5302 |
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106 | |||
107 | /* |
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108 | * Events are used to schedule things to happen at timer-interrupt |
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109 | * time, instead of at rs interrupt time. |
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110 | */ |
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111 | #define RS_EVENT_WRITE_WAKEUP 0 |
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112 | |||
113 | /* |
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114 | * Multiport serial configuration structure --- internal structure |
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115 | */ |
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116 | struct rs_multiport_struct { |
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117 | int port1; |
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118 | unsigned char mask1, match1; |
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119 | int port2; |
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120 | unsigned char mask2, match2; |
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121 | int port3; |
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122 | unsigned char mask3, match3; |
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123 | int port4; |
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124 | unsigned char mask4, match4; |
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125 | int port_monitor; |
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126 | }; |
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127 | |||
128 | #if defined(__alpha__) && !defined(CONFIG_PCI) |
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129 | /* |
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130 | * Digital did something really horribly wrong with the OUT1 and OUT2 |
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131 | * lines on at least some ALPHA's. The failure mode is that if either |
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132 | * is cleared, the machine locks up with endless interrupts. |
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133 | * |
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134 | * This is still used by arch/mips/au1000/common/serial.c for some weird |
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135 | * reason (mips != alpha!) |
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136 | */ |
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137 | #define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1) |
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138 | #else |
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139 | #define ALPHA_KLUDGE_MCR 0 |
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140 | #endif |
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141 | |||
142 | /* |
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143 | * Definitions for PCI support. |
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144 | */ |
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145 | #define SPCI_FL_BASE_MASK 0x0007 |
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146 | #define SPCI_FL_BASE0 0x0000 |
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147 | #define SPCI_FL_BASE1 0x0001 |
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148 | #define SPCI_FL_BASE2 0x0002 |
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149 | #define SPCI_FL_BASE3 0x0003 |
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150 | #define SPCI_FL_BASE4 0x0004 |
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151 | #define SPCI_FL_GET_BASE(x) (x & SPCI_FL_BASE_MASK) |
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152 | |||
153 | #define SPCI_FL_IRQ_MASK (0x0007 << 4) |
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154 | #define SPCI_FL_IRQBASE0 (0x0000 << 4) |
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155 | #define SPCI_FL_IRQBASE1 (0x0001 << 4) |
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156 | #define SPCI_FL_IRQBASE2 (0x0002 << 4) |
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157 | #define SPCI_FL_IRQBASE3 (0x0003 << 4) |
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158 | #define SPCI_FL_IRQBASE4 (0x0004 << 4) |
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159 | #define SPCI_FL_GET_IRQBASE(x) ((x & SPCI_FL_IRQ_MASK) >> 4) |
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160 | |||
161 | /* Use successive BARs (PCI base address registers), |
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162 | else use offset into some specified BAR */ |
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163 | #define SPCI_FL_BASE_TABLE 0x0100 |
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164 | |||
165 | /* Use successive entries in the irq resource table */ |
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166 | #define SPCI_FL_IRQ_TABLE 0x0200 |
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167 | |||
168 | /* Use the irq resource table instead of dev->irq */ |
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169 | #define SPCI_FL_IRQRESOURCE 0x0400 |
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170 | |||
171 | /* Use the Base address register size to cap number of ports */ |
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172 | #define SPCI_FL_REGION_SZ_CAP 0x0800 |
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173 | |||
174 | /* Do not use irq sharing for this device */ |
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175 | #define SPCI_FL_NO_SHIRQ 0x1000 |
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176 | |||
177 | /* This is a PNP device */ |
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178 | #define SPCI_FL_ISPNP 0x2000 |
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179 | |||
180 | #define SPCI_FL_PNPDEFAULT (SPCI_FL_IRQRESOURCE|SPCI_FL_ISPNP) |
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181 | |||
182 | #endif /* _LINUX_SERIAL_H */ |