linux/include/linux/ioc4.h
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   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * Copyright (c) 2005 Silicon Graphics, Inc.  All Rights Reserved.
   7 */
   8
   9#ifndef _LINUX_IOC4_H
  10#define _LINUX_IOC4_H
  11
  12#include <linux/interrupt.h>
  13
  14/***************
  15 * Definitions *
  16 ***************/
  17
  18/* Miscellaneous values inherent to hardware */
  19
  20#define IOC4_EXTINT_COUNT_DIVISOR 520   /* PCI clocks per COUNT tick */
  21
  22/***********************************
  23 * Structures needed by subdrivers *
  24 ***********************************/
  25
  26/* This structure fully describes the IOC4 miscellaneous registers which
  27 * appear at bar[0]+0x00000 through bar[0]+0x0005c.  The corresponding
  28 * PCI resource is managed by the main IOC4 driver because it contains
  29 * registers of interest to many different IOC4 subdrivers.
  30 */
  31struct ioc4_misc_regs {
  32        /* Miscellaneous IOC4 registers */
  33        union ioc4_pci_err_addr_l {
  34                uint32_t raw;
  35                struct {
  36                        uint32_t valid:1;       /* Address captured */
  37                        uint32_t master_id:4;   /* Unit causing error
  38                                                 * 0/1: Serial port 0 TX/RX
  39                                                 * 2/3: Serial port 1 TX/RX
  40                                                 * 4/5: Serial port 2 TX/RX
  41                                                 * 6/7: Serial port 3 TX/RX
  42                                                 * 8: ATA/ATAPI
  43                                                 * 9-15: Undefined
  44                                                 */
  45                        uint32_t mul_err:1;     /* Multiple errors occurred */
  46                        uint32_t addr:26;       /* Bits 31-6 of error addr */
  47                } fields;
  48        } pci_err_addr_l;
  49        uint32_t pci_err_addr_h;        /* Bits 63-32 of error addr */
  50        union ioc4_sio_int {
  51                uint32_t raw;
  52                struct {
  53                        uint8_t tx_mt:1;        /* TX ring buffer empty */
  54                        uint8_t rx_full:1;      /* RX ring buffer full */
  55                        uint8_t rx_high:1;      /* RX high-water exceeded */
  56                        uint8_t rx_timer:1;     /* RX timer has triggered */
  57                        uint8_t delta_dcd:1;    /* DELTA_DCD seen */
  58                        uint8_t delta_cts:1;    /* DELTA_CTS seen */
  59                        uint8_t intr_pass:1;    /* Interrupt pass-through */
  60                        uint8_t tx_explicit:1;  /* TX, MCW, or delay complete */
  61                } fields[4];
  62        } sio_ir;               /* Serial interrupt state */
  63        union ioc4_other_int {
  64                uint32_t raw;
  65                struct {
  66                        uint32_t ata_int:1;     /* ATA port passthru */
  67                        uint32_t ata_memerr:1;  /* ATA halted by mem error */
  68                        uint32_t memerr:4;      /* Serial halted by mem err */
  69                        uint32_t kbd_int:1;     /* kbd/mouse intr asserted */
  70                        uint32_t reserved:16;   /* zero */
  71                        uint32_t rt_int:1;      /* INT_OUT section latch */
  72                        uint32_t gen_int:8;     /* Intr. from generic pins */
  73                } fields;
  74        } other_ir;             /* Other interrupt state */
  75        union ioc4_sio_int sio_ies;     /* Serial interrupt enable set */
  76        union ioc4_other_int other_ies; /* Other interrupt enable set */
  77        union ioc4_sio_int sio_iec;     /* Serial interrupt enable clear */
  78        union ioc4_other_int other_iec; /* Other interrupt enable clear */
  79        union ioc4_sio_cr {
  80                uint32_t raw;
  81                struct {
  82                        uint32_t cmd_pulse:4;   /* Bytebus strobe width */
  83                        uint32_t arb_diag:3;    /* PCI bus requester */
  84                        uint32_t sio_diag_idle:1;       /* Active ser req? */
  85                        uint32_t ata_diag_idle:1;       /* Active ATA req? */
  86                        uint32_t ata_diag_active:1;     /* ATA req is winner */
  87                        uint32_t reserved:22;   /* zero */
  88                } fields;
  89        } sio_cr;
  90        uint32_t unused1;
  91        union ioc4_int_out {
  92                uint32_t raw;
  93                struct {
  94                        uint32_t count:16;      /* Period control */
  95                        uint32_t mode:3;        /* Output signal shape */
  96                        uint32_t reserved:11;   /* zero */
  97                        uint32_t diag:1;        /* Timebase control */
  98                        uint32_t int_out:1;     /* Current value */
  99                } fields;
 100        } int_out;              /* External interrupt output control */
 101        uint32_t unused2;
 102        union ioc4_gpcr {
 103                uint32_t raw;
 104                struct {
 105                        uint32_t dir:8; /* Pin direction */
 106                        uint32_t edge:8;        /* Edge/level mode */
 107                        uint32_t reserved1:4;   /* zero */
 108                        uint32_t int_out_en:1;  /* INT_OUT enable */
 109                        uint32_t reserved2:11;  /* zero */
 110                } fields;
 111        } gpcr_s;               /* Generic PIO control set */
 112        union ioc4_gpcr gpcr_c; /* Generic PIO control clear */
 113        union ioc4_gpdr {
 114                uint32_t raw;
 115                struct {
 116                        uint32_t gen_pin:8;     /* State of pins */
 117                        uint32_t reserved:24;
 118                } fields;
 119        } gpdr;                 /* Generic PIO data */
 120        uint32_t unused3;
 121        union ioc4_gppr {
 122                uint32_t raw;
 123                struct {
 124                        uint32_t gen_pin:1;     /* Single pin state */
 125                        uint32_t reserved:31;
 126                } fields;
 127        } gppr[8];              /* Generic PIO pins */
 128};
 129
 130/* Masks for GPCR DIR pins */
 131#define IOC4_GPCR_DIR_0 0x01    /* External interrupt output */
 132#define IOC4_GPCR_DIR_1 0x02    /* External interrupt input */
 133#define IOC4_GPCR_DIR_2 0x04
 134#define IOC4_GPCR_DIR_3 0x08    /* Keyboard/mouse presence */
 135#define IOC4_GPCR_DIR_4 0x10    /* Ser. port 0 xcvr select (0=232, 1=422) */
 136#define IOC4_GPCR_DIR_5 0x20    /* Ser. port 1 xcvr select (0=232, 1=422) */
 137#define IOC4_GPCR_DIR_6 0x40    /* Ser. port 2 xcvr select (0=232, 1=422) */
 138#define IOC4_GPCR_DIR_7 0x80    /* Ser. port 3 xcvr select (0=232, 1=422) */
 139
 140/* Masks for GPCR EDGE pins */
 141#define IOC4_GPCR_EDGE_0 0x01
 142#define IOC4_GPCR_EDGE_1 0x02   /* External interrupt input */
 143#define IOC4_GPCR_EDGE_2 0x04
 144#define IOC4_GPCR_EDGE_3 0x08
 145#define IOC4_GPCR_EDGE_4 0x10
 146#define IOC4_GPCR_EDGE_5 0x20
 147#define IOC4_GPCR_EDGE_6 0x40
 148#define IOC4_GPCR_EDGE_7 0x80
 149
 150#define IOC4_VARIANT_IO9        0x0900
 151#define IOC4_VARIANT_PCI_RT     0x0901
 152#define IOC4_VARIANT_IO10       0x1000
 153
 154/* One of these per IOC4 */
 155struct ioc4_driver_data {
 156        struct list_head idd_list;
 157        unsigned long idd_bar0;
 158        struct pci_dev *idd_pdev;
 159        const struct pci_device_id *idd_pci_id;
 160        struct ioc4_misc_regs __iomem *idd_misc_regs;
 161        unsigned long count_period;
 162        void *idd_serial_data;
 163        unsigned int idd_variant;
 164};
 165
 166/* One per submodule */
 167struct ioc4_submodule {
 168        struct list_head is_list;
 169        char *is_name;
 170        struct module *is_owner;
 171        int (*is_probe) (struct ioc4_driver_data *);
 172        int (*is_remove) (struct ioc4_driver_data *);
 173};
 174
 175#define IOC4_NUM_CARDS          8       /* max cards per partition */
 176
 177/**********************************
 178 * Functions needed by submodules *
 179 **********************************/
 180
 181extern int ioc4_register_submodule(struct ioc4_submodule *);
 182extern void ioc4_unregister_submodule(struct ioc4_submodule *);
 183
 184#endif                          /* _LINUX_IOC4_H */
 185
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