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 */ tc_get_speed(struct tc_bus * tbus)115static 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 tc_register_driver(struct tc_driver * tdrv)129static inline int tc_register_driver(struct tc_driver *tdrv) { return 0; } tc_unregister_driver(struct tc_driver * tdrv)130static 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 */ 142