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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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b454cc6636
This is a set of changes to convert support for the TURBOchannel bus to the driver model. It implements the usual set of calls similar to what other bus drivers have: tc_register_driver(), tc_unregister_driver(), etc. All the platform-specific bits have been removed and headers from asm-mips/dec/ have been merged into linux/tc.h, which should be included by drivers. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
142 lines
3.4 KiB
C
142 lines
3.4 KiB
C
/*
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* Interface to the TURBOchannel related routines.
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*
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* Copyright (c) 1998 Harald Koerfgen
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* Copyright (c) 2005 James Simmons
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* Copyright (c) 2006 Maciej W. Rozycki
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*
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* Based on:
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*
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* "TURBOchannel Firmware Specification", EK-TCAAD-FS-004
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*
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* from Digital Equipment Corporation.
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*
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* This file is subject to the terms and conditions of the GNU
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* General Public License. See the file "COPYING" in the main
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* directory of this archive for more details.
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*/
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#ifndef _LINUX_TC_H
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#define _LINUX_TC_H
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#include <linux/compiler.h>
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#include <linux/device.h>
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#include <linux/ioport.h>
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#include <linux/types.h>
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/*
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* Offsets for the ROM header locations for TURBOchannel cards.
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*/
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#define TC_OLDCARD 0x3c0000
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#define TC_NEWCARD 0x000000
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#define TC_ROM_WIDTH 0x3e0
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#define TC_ROM_STRIDE 0x3e4
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#define TC_ROM_SIZE 0x3e8
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#define TC_SLOT_SIZE 0x3ec
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#define TC_PATTERN0 0x3f0
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#define TC_PATTERN1 0x3f4
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#define TC_PATTERN2 0x3f8
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#define TC_PATTERN3 0x3fc
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#define TC_FIRM_VER 0x400
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#define TC_VENDOR 0x420
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#define TC_MODULE 0x440
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#define TC_FIRM_TYPE 0x460
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#define TC_FLAGS 0x470
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#define TC_ROM_OBJECTS 0x480
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/*
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* Information obtained through the get_tcinfo() PROM call.
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*/
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struct tcinfo {
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s32 revision; /* Hardware revision level. */
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s32 clk_period; /* Clock period in nanoseconds. */
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s32 slot_size; /* Slot size in megabytes. */
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s32 io_timeout; /* I/O timeout in cycles. */
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s32 dma_range; /* DMA address range in megabytes. */
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s32 max_dma_burst; /* Maximum DMA burst length. */
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s32 parity; /* System module supports TC parity. */
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s32 reserved[4];
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};
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/*
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* TURBOchannel bus.
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*/
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struct tc_bus {
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struct list_head devices; /* List of devices on this bus. */
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struct resource resource[2]; /* Address space routed to this bus. */
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struct device dev;
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char name[13];
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resource_size_t slot_base;
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resource_size_t ext_slot_base;
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resource_size_t ext_slot_size;
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int num_tcslots;
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struct tcinfo info;
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};
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/*
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* TURBOchannel device.
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*/
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struct tc_dev {
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struct list_head node; /* Node in list of all TC devices. */
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struct tc_bus *bus; /* Bus this device is on. */
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struct tc_driver *driver; /* Which driver has allocated this
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device. */
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struct device dev; /* Generic device interface. */
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struct resource resource; /* Address space of this device. */
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char vendor[9];
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char name[9];
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char firmware[9];
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int interrupt;
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int slot;
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};
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#define to_tc_dev(n) container_of(n, struct tc_dev, dev)
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struct tc_device_id {
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char vendor[9];
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char name[9];
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};
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/*
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* TURBOchannel driver.
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*/
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struct tc_driver {
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struct list_head node;
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const struct tc_device_id *id_table;
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struct device_driver driver;
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};
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#define to_tc_driver(drv) container_of(drv, struct tc_driver, driver)
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/*
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* Return TURBOchannel clock frequency in Hz.
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*/
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static inline unsigned long tc_get_speed(struct tc_bus *tbus)
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{
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return 100000 * (10000 / (unsigned long)tbus->info.clk_period);
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}
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#ifdef CONFIG_TC
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extern struct bus_type tc_bus_type;
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extern int tc_register_driver(struct tc_driver *tdrv);
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extern void tc_unregister_driver(struct tc_driver *tdrv);
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#else /* !CONFIG_TC */
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static inline int tc_register_driver(struct tc_driver *tdrv) { return 0; }
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static inline void tc_unregister_driver(struct tc_driver *tdrv) { }
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#endif /* CONFIG_TC */
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/*
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* These have to be provided by the architecture.
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*/
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extern int tc_preadb(u8 *valp, void __iomem *addr);
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extern int tc_bus_get_info(struct tc_bus *tbus);
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extern void tc_device_get_irq(struct tc_dev *tdev);
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#endif /* _LINUX_TC_H */
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