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[TC] MIPS: TURBOchannel update to the driver model

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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>
This commit is contained in:
Maciej W. Rozycki 2007-02-05 16:28:25 -08:00 committed by Ralf Baechle
parent 5986a2ec35
commit b454cc6636
8 changed files with 395 additions and 327 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
MAINTAINERS
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@ -3287,6 +3287,11 @@ L: vtun@office.satix.net
W: http://vtun.sourceforge.net/tun
S: Maintained
TURBOCHANNEL SUBSYSTEM
P: Maciej W. Rozycki
M: macro@linux-mips.org
S: Maintained
U14-34F SCSI DRIVER
P: Dario Ballabio
M: ballabio_dario@emc.com

2
drivers/tc/Makefile
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@ -4,7 +4,7 @@
# Object file lists.
obj-$(CONFIG_TC) += tc.o
obj-$(CONFIG_TC) += tc.o tc-driver.o
obj-$(CONFIG_ZS) += zs.o
obj-$(CONFIG_VT) += lk201.o lk201-map.o lk201-remap.o

110
drivers/tc/tc-driver.c Normal file
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@ -0,0 +1,110 @@
/*
* TURBOchannel driver services.
*
* Copyright (c) 2005 James Simmons
* Copyright (c) 2006 Maciej W. Rozycki
*
* Loosely based on drivers/dio/dio-driver.c and
* drivers/pci/pci-driver.c.
*
* 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.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/tc.h>
/**
* tc_register_driver - register a new TC driver
* @drv: the driver structure to register
*
* Adds the driver structure to the list of registered drivers
* Returns a negative value on error, otherwise 0.
* If no error occurred, the driver remains registered even if
* no device was claimed during registration.
*/
int tc_register_driver(struct tc_driver *tdrv)
{
return driver_register(&tdrv->driver);
}
EXPORT_SYMBOL(tc_register_driver);
/**
* tc_unregister_driver - unregister a TC driver
* @drv: the driver structure to unregister
*
* Deletes the driver structure from the list of registered TC drivers,
* gives it a chance to clean up by calling its remove() function for
* each device it was responsible for, and marks those devices as
* driverless.
*/
void tc_unregister_driver(struct tc_driver *tdrv)
{
driver_unregister(&tdrv->driver);
}
EXPORT_SYMBOL(tc_unregister_driver);
/**
* tc_match_device - tell if a TC device structure has a matching
* TC device ID structure
* @tdrv: the TC driver to earch for matching TC device ID strings
* @tdev: the TC device structure to match against
*
* Used by a driver to check whether a TC device present in the
* system is in its list of supported devices. Returns the matching
* tc_device_id structure or %NULL if there is no match.
*/
const struct tc_device_id *tc_match_device(struct tc_driver *tdrv,
struct tc_dev *tdev)
{
const struct tc_device_id *id = tdrv->id_table;
if (id) {
while (id->name[0] || id->vendor[0]) {
if (strcmp(tdev->name, id->name) == 0 &&
strcmp(tdev->vendor, id->vendor) == 0)
return id;
id++;
}
}
return NULL;
}
EXPORT_SYMBOL(tc_match_device);
/**
* tc_bus_match - Tell if a device structure has a matching
* TC device ID structure
* @dev: the device structure to match against
* @drv: the device driver to search for matching TC device ID strings
*
* Used by a driver to check whether a TC device present in the
* system is in its list of supported devices. Returns 1 if there
* is a match or 0 otherwise.
*/
static int tc_bus_match(struct device *dev, struct device_driver *drv)
{
struct tc_dev *tdev = to_tc_dev(dev);
struct tc_driver *tdrv = to_tc_driver(drv);
const struct tc_device_id *id;
id = tc_match_device(tdrv, tdev);
if (id)
return 1;
return 0;
}
struct bus_type tc_bus_type = {
.name = "tc",
.match = tc_bus_match,
};
EXPORT_SYMBOL(tc_bus_type);
static int __init tc_driver_init(void)
{
return bus_register(&tc_bus_type);
}
postcore_initcall(tc_driver_init);

337
drivers/tc/tc.c
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@ -1,254 +1,193 @@
/*
* tc-init: We assume the TURBOchannel to be up and running so
* just probe for Modules and fill in the global data structure
* tc_bus.
* TURBOchannel bus services.
*
* 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.
* Copyright (c) Harald Koerfgen, 1998
* Copyright (c) 2001, 2003, 2005, 2006 Maciej W. Rozycki
* Copyright (c) 2005 James Simmons
*
* Copyright (c) Harald Koerfgen, 1998
* Copyright (c) 2001, 2003, 2005 Maciej W. Rozycki
* 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.
*/
#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/tc.h>
#include <linux/types.h>
#include <asm/addrspace.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <asm/paccess.h>
#include <asm/dec/machtype.h>
#include <asm/dec/prom.h>
#include <asm/dec/tcinfo.h>
#include <asm/dec/tcmodule.h>
#include <asm/dec/interrupts.h>
MODULE_LICENSE("GPL");
slot_info tc_bus[MAX_SLOT];
static int num_tcslots;
static tcinfo *info;
static struct tc_bus tc_bus = {
.name = "TURBOchannel",
};
/*
* Interface to the world. Read comment in include/asm-mips/tc.h.
* Probing for TURBOchannel modules.
*/
int search_tc_card(const char *name)
static void __init tc_bus_add_devices(struct tc_bus *tbus)
{
int slot;
slot_info *sip;
for (slot = 0; slot < num_tcslots; slot++) {
sip = &tc_bus[slot];
if ((sip->flags & FREE) &&
(strncmp(sip->name, name, strlen(name)) == 0)) {
return slot;
}
}
return -ENODEV;
}
void claim_tc_card(int slot)
{
if (tc_bus[slot].flags & IN_USE) {
printk("claim_tc_card: attempting to claim a card already in use\n");
return;
}
tc_bus[slot].flags &= ~FREE;
tc_bus[slot].flags |= IN_USE;
}
void release_tc_card(int slot)
{
if (tc_bus[slot].flags & FREE) {
printk("release_tc_card: "
"attempting to release a card already free\n");
return;
}
tc_bus[slot].flags &= ~IN_USE;
tc_bus[slot].flags |= FREE;
}
unsigned long get_tc_base_addr(int slot)
{
return tc_bus[slot].base_addr;
}
unsigned long get_tc_irq_nr(int slot)
{
return tc_bus[slot].interrupt;
}
unsigned long get_tc_speed(void)
{
return 100000 * (10000 / (unsigned long)info->clk_period);
}
/*
* Probing for TURBOchannel modules
*/
static void __init tc_probe(unsigned long startaddr, unsigned long size,
int slots)
{
unsigned long slotaddr;
resource_size_t slotsize = tbus->info.slot_size << 20;
resource_size_t extslotsize = tbus->ext_slot_size;
resource_size_t slotaddr;
resource_size_t extslotaddr;
resource_size_t devsize;
void __iomem *module;
struct tc_dev *tdev;
int i, slot, err;
long offset;
u8 pattern[4];
volatile u8 *module;
long offset;
for (slot = 0; slot < slots; slot++) {
slotaddr = startaddr + slot * size;
module = ioremap_nocache(slotaddr, size);
for (slot = 0; slot < tbus->num_tcslots; slot++) {
slotaddr = tbus->slot_base + slot * slotsize;
extslotaddr = tbus->ext_slot_base + slot * extslotsize;
module = ioremap_nocache(slotaddr, slotsize);
BUG_ON(!module);
offset = OLDCARD;
offset = TC_OLDCARD;
err = 0;
err |= get_dbe(pattern[0], module + OLDCARD + TC_PATTERN0);
err |= get_dbe(pattern[1], module + OLDCARD + TC_PATTERN1);
err |= get_dbe(pattern[2], module + OLDCARD + TC_PATTERN2);
err |= get_dbe(pattern[3], module + OLDCARD + TC_PATTERN3);
if (err) {
iounmap(module);
continue;
}
err |= tc_preadb(pattern + 0, module + offset + TC_PATTERN0);
err |= tc_preadb(pattern + 1, module + offset + TC_PATTERN1);
err |= tc_preadb(pattern + 2, module + offset + TC_PATTERN2);
err |= tc_preadb(pattern + 3, module + offset + TC_PATTERN3);
if (err)
goto out_err;
if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
pattern[2] != 0xaa || pattern[3] != 0xff) {
offset = NEWCARD;
offset = TC_NEWCARD;
err = 0;
err |= get_dbe(pattern[0], module + TC_PATTERN0);
err |= get_dbe(pattern[1], module + TC_PATTERN1);
err |= get_dbe(pattern[2], module + TC_PATTERN2);
err |= get_dbe(pattern[3], module + TC_PATTERN3);
if (err) {
iounmap(module);
continue;
}
err |= tc_preadb(pattern + 0,
module + offset + TC_PATTERN0);
err |= tc_preadb(pattern + 1,
module + offset + TC_PATTERN1);
err |= tc_preadb(pattern + 2,
module + offset + TC_PATTERN2);
err |= tc_preadb(pattern + 3,
module + offset + TC_PATTERN3);
if (err)
goto out_err;
}
if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
pattern[2] != 0xaa || pattern[3] != 0xff) {
iounmap(module);
continue;
}
pattern[2] != 0xaa || pattern[3] != 0xff)
goto out_err;
/* Found a board, allocate it an entry in the list */
tdev = kzalloc(sizeof(*tdev), GFP_KERNEL);
if (!tdev) {
printk(KERN_ERR "tc%x: unable to allocate tc_dev\n",
slot);
goto out_err;
}
sprintf(tdev->dev.bus_id, "tc%x", slot);
tdev->bus = tbus;
tdev->dev.parent = &tbus->dev;
tdev->dev.bus = &tc_bus_type;
tdev->slot = slot;
tc_bus[slot].base_addr = slotaddr;
for (i = 0; i < 8; i++) {
tc_bus[slot].firmware[i] =
module[TC_FIRM_VER + offset + 4 * i];
tc_bus[slot].vendor[i] =
module[TC_VENDOR + offset + 4 * i];
tc_bus[slot].name[i] =
module[TC_MODULE + offset + 4 * i];
}
tc_bus[slot].firmware[8] = 0;
tc_bus[slot].vendor[8] = 0;
tc_bus[slot].name[8] = 0;
/*
* Looks unneccesary, but we may change
* TC? in the future
*/
switch (slot) {
case 0:
tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC0];
break;
case 1:
tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC1];
break;
case 2:
tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC2];
break;
/*
* Yuck! DS5000/200 onboard devices
*/
case 5:
tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC5];
break;
case 6:
tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC6];
break;
default:
tc_bus[slot].interrupt = -1;
break;
tdev->firmware[i] =
readb(module + offset + TC_FIRM_VER + 4 * i);
tdev->vendor[i] =
readb(module + offset + TC_VENDOR + 4 * i);
tdev->name[i] =
readb(module + offset + TC_MODULE + 4 * i);
}
tdev->firmware[8] = 0;
tdev->vendor[8] = 0;
tdev->name[8] = 0;
pr_info("%s: %s %s %s\n", tdev->dev.bus_id, tdev->vendor,
tdev->name, tdev->firmware);
devsize = readb(module + offset + TC_SLOT_SIZE);
devsize <<= 22;
if (devsize <= slotsize) {
tdev->resource.start = slotaddr;
tdev->resource.end = slotaddr + devsize - 1;
} else if (devsize <= extslotsize) {
tdev->resource.start = extslotaddr;
tdev->resource.end = extslotaddr + devsize - 1;
} else {
printk(KERN_ERR "%s: Cannot provide slot space "
"(%dMiB required, up to %dMiB supported)\n",
tdev->dev.bus_id, devsize >> 20,
max(slotsize, extslotsize) >> 20);
kfree(tdev);
goto out_err;
}
tdev->resource.name = tdev->name;
tdev->resource.flags = IORESOURCE_MEM;
tc_device_get_irq(tdev);
device_register(&tdev->dev);
list_add_tail(&tdev->node, &tbus->devices);
out_err:
iounmap(module);
}
}
/*
* the main entry
* The main entry.
*/
static int __init tc_init(void)
{
int tc_clock;
int i;
unsigned long slot0addr;
unsigned long slot_size;
if (!TURBOCHANNEL)
/* Initialize the TURBOchannel bus */
if (tc_bus_get_info(&tc_bus))
return 0;
for (i = 0; i < MAX_SLOT; i++) {
tc_bus[i].base_addr = 0;
tc_bus[i].name[0] = 0;
tc_bus[i].vendor[0] = 0;
tc_bus[i].firmware[0] = 0;
tc_bus[i].interrupt = -1;
tc_bus[i].flags = FREE;
}
INIT_LIST_HEAD(&tc_bus.devices);
strcpy(tc_bus.dev.bus_id, "tc");
device_register(&tc_bus.dev);
info = rex_gettcinfo();
slot0addr = CPHYSADDR((long)rex_slot_address(0));
if (tc_bus.info.slot_size) {
unsigned int tc_clock = tc_get_speed(&tc_bus) / 100000;
switch (mips_machtype) {
case MACH_DS5000_200:
num_tcslots = 7;
break;
case MACH_DS5000_1XX:
case MACH_DS5000_2X0:
case MACH_DS5900:
num_tcslots = 3;
break;
case MACH_DS5000_XX:
default:
num_tcslots = 2;
break;
}
pr_info("tc: TURBOchannel rev. %d at %d.%d MHz "
"(with%s parity)\n", tc_bus.info.revision,
tc_clock / 10, tc_clock % 10,
tc_bus.info.parity ? "" : "out");
tc_clock = 10000 / info->clk_period;
if (info->slot_size && slot0addr) {
pr_info("TURBOchannel rev. %d at %d.%d MHz (with%s parity)\n",
info->revision, tc_clock / 10, tc_clock % 10,
info->parity ? "" : "out");
slot_size = info->slot_size << 20;
tc_probe(slot0addr, slot_size, num_tcslots);
for (i = 0; i < num_tcslots; i++) {
if (!tc_bus[i].base_addr)
continue;
pr_info(" slot %d: %s %s %s\n", i, tc_bus[i].vendor,
tc_bus[i].name, tc_bus[i].firmware);
tc_bus.resource[0].start = tc_bus.slot_base;
tc_bus.resource[0].end = tc_bus.slot_base +
(tc_bus.info.slot_size << 20) *
tc_bus.num_tcslots;
tc_bus.resource[0].name = tc_bus.name;
tc_bus.resource[0].flags = IORESOURCE_MEM;
if (request_resource(&iomem_resource,
&tc_bus.resource[0]) < 0) {
printk(KERN_ERR "tc: Cannot reserve resource\n");
return 0;
}
if (tc_bus.ext_slot_size) {
tc_bus.resource[1].start = tc_bus.ext_slot_base;
tc_bus.resource[1].end = tc_bus.ext_slot_base +
tc_bus.ext_slot_size *
tc_bus.num_tcslots;
tc_bus.resource[1].name = tc_bus.name;
tc_bus.resource[1].flags = IORESOURCE_MEM;
if (request_resource(&iomem_resource,
&tc_bus.resource[1]) < 0) {
printk(KERN_ERR
"tc: Cannot reserve resource\n");
release_resource(&tc_bus.resource[0]);
return 0;
}
}
tc_bus_add_devices(&tc_bus);
}
return 0;
}
subsys_initcall(tc_init);
EXPORT_SYMBOL(search_tc_card);
EXPORT_SYMBOL(claim_tc_card);
EXPORT_SYMBOL(release_tc_card);
EXPORT_SYMBOL(get_tc_base_addr);
EXPORT_SYMBOL(get_tc_irq_nr);
EXPORT_SYMBOL(get_tc_speed);

41
include/asm-mips/dec/tc.h
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@ -1,41 +0,0 @@
/*
* Interface to the TURBOchannel related routines
*
* 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.
*
* Copyright (c) 1998 Harald Koerfgen
*/
#ifndef __ASM_DEC_TC_H
#define __ASM_DEC_TC_H
/*
* Search for a TURBOchannel Option Module
* with a certain name. Returns slot number
* of the first card not in use or -ENODEV
* if none found.
*/
extern int search_tc_card(const char *);
/*
* Marks the card in slot as used
*/
extern void claim_tc_card(int);
/*
* Marks the card in slot as free
*/
extern void release_tc_card(int);
/*
* Return base address of card in slot
*/
extern unsigned long get_tc_base_addr(int);
/*
* Return interrupt number of slot
*/
extern unsigned long get_tc_irq_nr(int);
/*
* Return TURBOchannel clock frequency in Hz
*/
extern unsigned long get_tc_speed(void);
#endif /* __ASM_DEC_TC_H */

47
include/asm-mips/dec/tcinfo.h
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@ -1,47 +0,0 @@
/*
* Various TURBOchannel related stuff
*
* 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.
*
* Information obtained through the get_tcinfo prom call
* created from:
*
* TURBOchannel Firmware Specification
*
* EK-TCAAD-FS-004
* from Digital Equipment Corporation
*
* Copyright (c) 1998 Harald Koerfgen
*/
typedef struct {
int revision;
int clk_period;
int slot_size;
int io_timeout;
int dma_range;
int max_dma_burst;
int parity;
int reserved[4];
} tcinfo;
#define MAX_SLOT 7
typedef struct {
unsigned long base_addr;
unsigned char name[9];
unsigned char vendor[9];
unsigned char firmware[9];
int interrupt;
int flags;
} slot_info;
/*
* Values for flags
*/
#define FREE 1<<0
#define IN_USE 1<<1

39
include/asm-mips/dec/tcmodule.h
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@ -1,39 +0,0 @@
/*
* 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.
*
* Offsets for the ROM header locations for
* TURBOchannel cards
*
* created from:
*
* TURBOchannel Firmware Specification
*
* EK-TCAAD-FS-004
* from Digital Equipment Corporation
*
* Jan.1998 Harald Koerfgen
*/
#ifndef __ASM_DEC_TCMODULE_H
#define __ASM_DEC_TCMODULE_H
#define OLDCARD 0x3c0000
#define 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
#endif /* __ASM_DEC_TCMODULE_H */

141
include/linux/tc.h Normal file
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@ -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 */