include/linux/ioc4.h

   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  */
  31 struct 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 /* One of these per IOC4 */
 151 struct ioc4_driver_data {
 152         struct list_head idd_list;
 153         unsigned long idd_bar0;
 154         struct pci_dev *idd_pdev;
 155         const struct pci_device_id *idd_pci_id;
 156         struct __iomem ioc4_misc_regs *idd_misc_regs;
 157         unsigned long count_period;
 158         void *idd_serial_data;
 159 };
 160
 161 /* One per submodule */
 162 struct ioc4_submodule {
 163         struct list_head is_list;
 164         char *is_name;
 165         struct module *is_owner;
 166         int (*is_probe) (struct ioc4_driver_data *);
 167         int (*is_remove) (struct ioc4_driver_data *);
 168 };
 169
 170 #define IOC4_NUM_CARDS          8       /* max cards per partition */
 171
 172 /**********************************
 173  * Functions needed by submodules *
 174  **********************************/
 175
 176 extern int ioc4_register_submodule(struct ioc4_submodule *);
 177 extern void ioc4_unregister_submodule(struct ioc4_submodule *);
 178
 179 #endif                          /* _LINUX_IOC4_H */