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/*
* 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. */
u64 dma_mask; /* DMA addressable range. */
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_const(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 const 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 */
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