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Diffstat (limited to 'kernel/include/linux/tc.h')
| -rw-r--r-- | kernel/include/linux/tc.h | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/kernel/include/linux/tc.h b/kernel/include/linux/tc.h new file mode 100644 index 000000000..f92511e57 --- /dev/null +++ b/kernel/include/linux/tc.h @@ -0,0 +1,141 @@ +/* + * Interface to the TURBOchannel related routines. + * + * Copyright (c) 1998 Harald Koerfgen + * Copyright (c) 2005 James Simmons + * Copyright (c) 2006 Maciej W. Rozycki + * + * Based on: + * + * "TURBOchannel Firmware Specification", EK-TCAAD-FS-004 + * + * from Digital Equipment Corporation. + * + * This file is subject to the terms and conditions of the GNU + * General Public License. See the file "COPYING" in the main + * directory of this archive for more details. + */ +#ifndef _LINUX_TC_H +#define _LINUX_TC_H + +#include <linux/compiler.h> +#include <linux/device.h> +#include <linux/ioport.h> +#include <linux/types.h> + +/* + * Offsets for the ROM header locations for TURBOchannel cards. + */ +#define TC_OLDCARD 0x3c0000 +#define TC_NEWCARD 0x000000 + +#define TC_ROM_WIDTH 0x3e0 +#define TC_ROM_STRIDE 0x3e4 +#define TC_ROM_SIZE 0x3e8 +#define TC_SLOT_SIZE 0x3ec +#define TC_PATTERN0 0x3f0 +#define TC_PATTERN1 0x3f4 +#define TC_PATTERN2 0x3f8 +#define TC_PATTERN3 0x3fc +#define TC_FIRM_VER 0x400 +#define TC_VENDOR 0x420 +#define TC_MODULE 0x440 +#define TC_FIRM_TYPE 0x460 +#define TC_FLAGS 0x470 +#define TC_ROM_OBJECTS 0x480 + +/* + * Information obtained through the get_tcinfo() PROM call. + */ +struct tcinfo { + s32 revision; /* Hardware revision level. */ + s32 clk_period; /* Clock period in nanoseconds. */ + s32 slot_size; /* Slot size in megabytes. */ + s32 io_timeout; /* I/O timeout in cycles. */ + s32 dma_range; /* DMA address range in megabytes. */ + s32 max_dma_burst; /* Maximum DMA burst length. */ + s32 parity; /* System module supports TC parity. */ + s32 reserved[4]; +}; + +/* + * TURBOchannel bus. + */ +struct tc_bus { + struct list_head devices; /* List of devices on this bus. */ + struct resource resource[2]; /* Address space routed to this bus. */ + + struct device dev; + char name[13]; + resource_size_t slot_base; + resource_size_t ext_slot_base; + resource_size_t ext_slot_size; + int num_tcslots; + struct tcinfo info; +}; + +/* + * TURBOchannel device. + */ +struct tc_dev { + struct list_head node; /* Node in list of all TC devices. */ + struct tc_bus *bus; /* Bus this device is on. */ + struct tc_driver *driver; /* Which driver has allocated this + device. */ + struct device dev; /* Generic device interface. */ + struct resource resource; /* Address space of this device. */ + char vendor[9]; + char name[9]; + char firmware[9]; + int interrupt; + int slot; +}; + +#define to_tc_dev(n) container_of(n, struct tc_dev, dev) + +struct tc_device_id { + char vendor[9]; + char name[9]; +}; + +/* + * TURBOchannel driver. + */ +struct tc_driver { + struct list_head node; + const struct tc_device_id *id_table; + struct device_driver driver; +}; + +#define to_tc_driver(drv) container_of(drv, struct tc_driver, driver) + +/* + * Return TURBOchannel clock frequency in Hz. + */ +static inline unsigned long tc_get_speed(struct tc_bus *tbus) +{ + return 100000 * (10000 / (unsigned long)tbus->info.clk_period); +} + +#ifdef CONFIG_TC + +extern struct bus_type tc_bus_type; + +extern int tc_register_driver(struct tc_driver *tdrv); +extern void tc_unregister_driver(struct tc_driver *tdrv); + +#else /* !CONFIG_TC */ + +static inline int tc_register_driver(struct tc_driver *tdrv) { return 0; } +static inline void tc_unregister_driver(struct tc_driver *tdrv) { } + +#endif /* CONFIG_TC */ + +/* + * These have to be provided by the architecture. + */ +extern int tc_preadb(u8 *valp, void __iomem *addr); +extern int tc_bus_get_info(struct tc_bus *tbus); +extern void tc_device_get_irq(struct tc_dev *tdev); + +#endif /* _LINUX_TC_H */ |