include/linux/tc.h

   1 /*
   2  *      Interface to the TURBOchannel related routines.
   3  *
   4  *      Copyright (c) 1998  Harald Koerfgen
   5  *      Copyright (c) 2005  James Simmons
   6  *      Copyright (c) 2006  Maciej W. Rozycki
   7  *
   8  *      Based on:
   9  *
  10  *      "TURBOchannel Firmware Specification", EK-TCAAD-FS-004
  11  *
  12  *      from Digital Equipment Corporation.
  13  *
  14  *      This file is subject to the terms and conditions of the GNU
  15  *      General Public License.  See the file "COPYING" in the main
  16  *      directory of this archive for more details.
  17  */
  18 #ifndef _LINUX_TC_H
  19 #define _LINUX_TC_H
  20
  21 #include <linux/compiler.h>
  22 #include <linux/device.h>
  23 #include <linux/ioport.h>
  24 #include <linux/types.h>
  25
  26 /*
  27  * Offsets for the ROM header locations for TURBOchannel cards.
  28  */
  29 #define TC_OLDCARD      0x3c0000
  30 #define TC_NEWCARD      0x000000
  31
  32 #define TC_ROM_WIDTH    0x3e0
  33 #define TC_ROM_STRIDE   0x3e4
  34 #define TC_ROM_SIZE     0x3e8
  35 #define TC_SLOT_SIZE    0x3ec
  36 #define TC_PATTERN0     0x3f0
  37 #define TC_PATTERN1     0x3f4
  38 #define TC_PATTERN2     0x3f8
  39 #define TC_PATTERN3     0x3fc
  40 #define TC_FIRM_VER     0x400
  41 #define TC_VENDOR       0x420
  42 #define TC_MODULE       0x440
  43 #define TC_FIRM_TYPE    0x460
  44 #define TC_FLAGS        0x470
  45 #define TC_ROM_OBJECTS  0x480
  46
  47 /*
  48  * Information obtained through the get_tcinfo() PROM call.
  49  */
  50 struct tcinfo {
  51         s32             revision;       /* Hardware revision level. */
  52         s32             clk_period;     /* Clock period in nanoseconds. */
  53         s32             slot_size;      /* Slot size in megabytes. */
  54         s32             io_timeout;     /* I/O timeout in cycles. */
  55         s32             dma_range;      /* DMA address range in megabytes. */
  56         s32             max_dma_burst;  /* Maximum DMA burst length. */
  57         s32             parity;         /* System module supports TC parity. */
  58         s32             reserved[4];
  59 };
  60
  61 /*
  62  * TURBOchannel bus.
  63  */
  64 struct tc_bus {
  65         struct list_head devices;       /* List of devices on this bus. */
  66         struct resource resource[2];    /* Address space routed to this bus. */
  67
  68         struct device   dev;
  69         char            name[13];
  70         resource_size_t slot_base;
  71         resource_size_t ext_slot_base;
  72         resource_size_t ext_slot_size;
  73         int             num_tcslots;
  74         struct tcinfo   info;
  75 };
  76
  77 /*
  78  * TURBOchannel device.
  79  */
  80 struct tc_dev {
  81         struct list_head node;          /* Node in list of all TC devices. */
  82         struct tc_bus   *bus;           /* Bus this device is on. */
  83         struct tc_driver *driver;       /* Which driver has allocated this
  84                                            device. */
  85         struct device   dev;            /* Generic device interface. */
  86         struct resource resource;       /* Address space of this device. */
  87         char            vendor[9];
  88         char            name[9];
  89         char            firmware[9];
  90         int             interrupt;
  91         int             slot;
  92 };
  93
  94 #define to_tc_dev(n) container_of(n, struct tc_dev, dev)
  95
  96 struct tc_device_id {
  97         char            vendor[9];
  98         char            name[9];
  99 };
 100
 101 /*
 102  * TURBOchannel driver.
 103  */
 104 struct tc_driver {
 105         struct list_head node;
 106         const struct tc_device_id *id_table;
 107         struct device_driver driver;
 108 };
 109
 110 #define to_tc_driver(drv) container_of(drv, struct tc_driver, driver)
 111
 112 /*
 113  * Return TURBOchannel clock frequency in Hz.
 114  */
 115 static inline unsigned long tc_get_speed(struct tc_bus *tbus)
 116 {
 117         return 100000 * (10000 / (unsigned long)tbus->info.clk_period);
 118 }
 119
 120 #ifdef CONFIG_TC
 121
 122 extern struct bus_type tc_bus_type;
 123
 124 extern int tc_register_driver(struct tc_driver *tdrv);
 125 extern void tc_unregister_driver(struct tc_driver *tdrv);
 126
 127 #else /* !CONFIG_TC */
 128
 129 static inline int tc_register_driver(struct tc_driver *tdrv) { return 0; }
 130 static inline void tc_unregister_driver(struct tc_driver *tdrv) { }
 131
 132 #endif /* CONFIG_TC */
 133
 134 /*
 135  * These have to be provided by the architecture.
 136  */
 137 extern int tc_preadb(u8 *valp, void __iomem *addr);
 138 extern int tc_bus_get_info(struct tc_bus *tbus);
 139 extern void tc_device_get_irq(struct tc_dev *tdev);
 140
 141 #endif /* _LINUX_TC_H */