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drivers: remove the SGI SN2 IOC4 base support

Browse Source 
The IOC4 is a multi-function chip seen on SGI SN2 and some SGI MIPS
systems.  This removes the base driver, which while not having an SN2
Kconfig dependency was only for sub-drivers that had one.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lkml.kernel.org/r/20190813072514.23299-15-hch@lst.de
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Christoph Hellwig 2019-08-13 09:25:00 +02:00 committed by Tony Luck
parent c9fa9c327b
commit f7bc6e42bf
13 changed files with 0 additions and 752 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
Documentation/driver-api/sgi-ioc4.rst
View File

@ -1,49 +0,0 @@
====================================
SGI IOC4 PCI (multi function) device
====================================
The SGI IOC4 PCI device is a bit of a strange beast, so some notes on
it are in order.
First, even though the IOC4 performs multiple functions, such as an
IDE controller, a serial controller, a PS/2 keyboard/mouse controller,
and an external interrupt mechanism, it's not implemented as a
multifunction device. The consequence of this from a software
standpoint is that all these functions share a single IRQ, and
they can't all register to own the same PCI device ID. To make
matters a bit worse, some of the register blocks (and even registers
themselves) present in IOC4 are mixed-purpose between these several
functions, meaning that there's no clear "owning" device driver.
The solution is to organize the IOC4 driver into several independent
drivers, "ioc4", "sgiioc4", and "ioc4_serial". Note that there is no
PS/2 controller driver as this functionality has never been wired up
on a shipping IO card.
ioc4
====
This is the core (or shim) driver for IOC4. It is responsible for
initializing the basic functionality of the chip, and allocating
the PCI resources that are shared between the IOC4 functions.
This driver also provides registration functions that the other
IOC4 drivers can call to make their presence known. Each driver
needs to provide a probe and remove function, which are invoked
by the core driver at appropriate times. The interface of these
IOC4 function probe and remove operations isn't precisely the same
as PCI device probe and remove operations, but is logically the
same operation.
sgiioc4
=======
This is the IDE driver for IOC4. Its name isn't very descriptive
simply for historical reasons (it used to be the only IOC4 driver
component). There's not much to say about it other than it hooks
up to the ioc4 driver via the appropriate registration, probe, and
remove functions.
ioc4_serial
===========
This is the serial driver for IOC4. There's not much to say about it
other than it hooks up to the ioc4 driver via the appropriate registration,
probe, and remove functions.

1
arch/ia64/configs/generic_defconfig
View File

@ -44,7 +44,6 @@ CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_CRYPTOLOOP=m
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_RAM=y
CONFIG_SGI_IOC4=y
CONFIG_SGI_XP=m
CONFIG_IDE=y
CONFIG_BLK_DEV_IDECD=y

1
arch/ia64/configs/gensparse_defconfig
View File

@ -36,7 +36,6 @@ CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_CRYPTOLOOP=m
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_RAM=y
CONFIG_SGI_IOC4=y
CONFIG_IDE=y
CONFIG_BLK_DEV_IDECD=y
CONFIG_IDE_GENERIC=y

1
arch/mips/configs/bigsur_defconfig
View File

@ -103,7 +103,6 @@ CONFIG_FW_LOADER=m
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_CRYPTOLOOP=m
CONFIG_BLK_DEV_NBD=m
CONFIG_SGI_IOC4=m
CONFIG_EEPROM_LEGACY=y
CONFIG_EEPROM_MAX6875=y
CONFIG_IDE=y

1
arch/mips/configs/ip32_defconfig
View File

@ -46,7 +46,6 @@ CONFIG_CONNECTOR=y
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_CRYPTOLOOP=m
CONFIG_BLK_DEV_NBD=m
CONFIG_SGI_IOC4=y
CONFIG_RAID_ATTRS=y
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y

1
arch/mips/configs/markeins_defconfig
View File

@ -117,7 +117,6 @@ CONFIG_MTD_CFI_AMDSTD=y
CONFIG_MTD_PHYSMAP=y
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_CRYPTOLOOP=m
CONFIG_SGI_IOC4=m
CONFIG_SCSI=m
# CONFIG_SCSI_PROC_FS is not set
CONFIG_BLK_DEV_SD=m

1
arch/mips/configs/rm200_defconfig
View File

@ -198,7 +198,6 @@ CONFIG_BLK_DEV_SX8=m
CONFIG_BLK_DEV_RAM=m
CONFIG_CDROM_PKTCDVD=m
CONFIG_ATA_OVER_ETH=m
CONFIG_SGI_IOC4=m
CONFIG_RAID_ATTRS=m
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y

1
arch/mips/configs/sb1250_swarm_defconfig
View File

@ -49,7 +49,6 @@ CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_SIZE=9220
CONFIG_CDROM_PKTCDVD=m
CONFIG_ATA_OVER_ETH=m
CONFIG_SGI_IOC4=m
CONFIG_IDE=y
CONFIG_BLK_DEV_IDECD=y
CONFIG_BLK_DEV_IDETAPE=y

12
drivers/misc/Kconfig
View File

@ -126,18 +126,6 @@ config INTEL_MID_PTI
an Intel Atom (non-netbook) mobile device containing a MIPI
P1149.7 standard implementation.
config SGI_IOC4
tristate "SGI IOC4 Base IO support"
depends on PCI
---help---
This option enables basic support for the IOC4 chip on certain
SGI IO controller cards (IO9, IO10, and PCI-RT). This option
does not enable any specific functions on such a card, but provides
necessary infrastructure for other drivers to utilize.
If you have an SGI Altix with an IOC4-based card say Y.
Otherwise say N.
config TIFM_CORE
tristate "TI Flash Media interface support"
depends on PCI

1
drivers/misc/Makefile
View File

@ -21,7 +21,6 @@ obj-$(CONFIG_QCOM_COINCELL) += qcom-coincell.o
obj-$(CONFIG_QCOM_FASTRPC) += fastrpc.o
obj-$(CONFIG_SENSORS_BH1770) += bh1770glc.o
obj-$(CONFIG_SENSORS_APDS990X) += apds990x.o
obj-$(CONFIG_SGI_IOC4) += ioc4.o
obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
obj-$(CONFIG_KGDB_TESTS) += kgdbts.o
obj-$(CONFIG_SGI_XP) += sgi-xp/

498
drivers/misc/ioc4.c
View File

@ -1,498 +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.
*
* Copyright (C) 2005-2006 Silicon Graphics, Inc. All Rights Reserved.
*/
/* This file contains the master driver module for use by SGI IOC4 subdrivers.
*
* It allocates any resources shared between multiple subdevices, and
* provides accessor functions (where needed) and the like for those
* resources. It also provides a mechanism for the subdevice modules
* to support loading and unloading.
*
* Non-shared resources (e.g. external interrupt A_INT_OUT register page
* alias, serial port and UART registers) are handled by the subdevice
* modules themselves.
*
* This is all necessary because IOC4 is not implemented as a multi-function
* PCI device, but an amalgamation of disparate registers for several
* types of device (ATA, serial, external interrupts). The normal
* resource management in the kernel doesn't have quite the right interfaces
* to handle this situation (e.g. multiple modules can't claim the same
* PCI ID), thus this IOC4 master module.
*/
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/ioc4.h>
#include <linux/ktime.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/time.h>
#include <asm/io.h>
/***************
* Definitions *
***************/
/* Tweakable values */
/* PCI bus speed detection/calibration */
#define IOC4_CALIBRATE_COUNT 63 /* Calibration cycle period */
#define IOC4_CALIBRATE_CYCLES 256 /* Average over this many cycles */
#define IOC4_CALIBRATE_DISCARD 2 /* Discard first few cycles */
#define IOC4_CALIBRATE_LOW_MHZ 25 /* Lower bound on bus speed sanity */
#define IOC4_CALIBRATE_HIGH_MHZ 75 /* Upper bound on bus speed sanity */
#define IOC4_CALIBRATE_DEFAULT_MHZ 66 /* Assumed if sanity check fails */
/************************
* Submodule management *
************************/
static DEFINE_MUTEX(ioc4_mutex);
static LIST_HEAD(ioc4_devices);
static LIST_HEAD(ioc4_submodules);
/* Register an IOC4 submodule */
int
ioc4_register_submodule(struct ioc4_submodule *is)
{
struct ioc4_driver_data *idd;
mutex_lock(&ioc4_mutex);
list_add(&is->is_list, &ioc4_submodules);
/* Initialize submodule for each IOC4 */
if (!is->is_probe)
goto out;
list_for_each_entry(idd, &ioc4_devices, idd_list) {
if (is->is_probe(idd)) {
printk(KERN_WARNING
"%s: IOC4 submodule %s probe failed "
"for pci_dev %s",
__func__, module_name(is->is_owner),
pci_name(idd->idd_pdev));
}
}
out:
mutex_unlock(&ioc4_mutex);
return 0;
}
/* Unregister an IOC4 submodule */
void
ioc4_unregister_submodule(struct ioc4_submodule *is)
{
struct ioc4_driver_data *idd;
mutex_lock(&ioc4_mutex);
list_del(&is->is_list);
/* Remove submodule for each IOC4 */
if (!is->is_remove)
goto out;
list_for_each_entry(idd, &ioc4_devices, idd_list) {
if (is->is_remove(idd)) {
printk(KERN_WARNING
"%s: IOC4 submodule %s remove failed "
"for pci_dev %s.\n",
__func__, module_name(is->is_owner),
pci_name(idd->idd_pdev));
}
}
out:
mutex_unlock(&ioc4_mutex);
}
/*********************
* Device management *
*********************/
#define IOC4_CALIBRATE_LOW_LIMIT \
(1000*IOC4_EXTINT_COUNT_DIVISOR/IOC4_CALIBRATE_LOW_MHZ)
#define IOC4_CALIBRATE_HIGH_LIMIT \
(1000*IOC4_EXTINT_COUNT_DIVISOR/IOC4_CALIBRATE_HIGH_MHZ)
#define IOC4_CALIBRATE_DEFAULT \
(1000*IOC4_EXTINT_COUNT_DIVISOR/IOC4_CALIBRATE_DEFAULT_MHZ)
#define IOC4_CALIBRATE_END \
(IOC4_CALIBRATE_CYCLES + IOC4_CALIBRATE_DISCARD)
#define IOC4_INT_OUT_MODE_TOGGLE 0x7 /* Toggle INT_OUT every COUNT+1 ticks */
/* Determines external interrupt output clock period of the PCI bus an
* IOC4 is attached to. This value can be used to determine the PCI
* bus speed.
*
* IOC4 has a design feature that various internal timers are derived from
* the PCI bus clock. This causes IOC4 device drivers to need to take the
* bus speed into account when setting various register values (e.g. INT_OUT
* register COUNT field, UART divisors, etc). Since this information is
* needed by several subdrivers, it is determined by the main IOC4 driver,
* even though the following code utilizes external interrupt registers
* to perform the speed calculation.
*/
static void
ioc4_clock_calibrate(struct ioc4_driver_data *idd)
{
union ioc4_int_out int_out;
union ioc4_gpcr gpcr;
unsigned int state, last_state;
uint64_t start, end, period;
unsigned int count;
/* Enable output */
gpcr.raw = 0;
gpcr.fields.dir = IOC4_GPCR_DIR_0;
gpcr.fields.int_out_en = 1;
writel(gpcr.raw, &idd->idd_misc_regs->gpcr_s.raw);
/* Reset to power-on state */
writel(0, &idd->idd_misc_regs->int_out.raw);
/* Set up square wave */
int_out.raw = 0;
int_out.fields.count = IOC4_CALIBRATE_COUNT;
int_out.fields.mode = IOC4_INT_OUT_MODE_TOGGLE;
int_out.fields.diag = 0;
writel(int_out.raw, &idd->idd_misc_regs->int_out.raw);
/* Check square wave period averaged over some number of cycles */
start = ktime_get_ns();
state = 1; /* make sure the first read isn't a rising edge */
for (count = 0; count <= IOC4_CALIBRATE_END; count++) {
do { /* wait for a rising edge */
last_state = state;
int_out.raw = readl(&idd->idd_misc_regs->int_out.raw);
state = int_out.fields.int_out;
} while (last_state || !state);
/* discard the first few cycles */
if (count == IOC4_CALIBRATE_DISCARD)
start = ktime_get_ns();
}
end = ktime_get_ns();
/* Calculation rearranged to preserve intermediate precision.
* Logically:
* 1. "end - start" gives us the measurement period over all
* the square wave cycles.
* 2. Divide by number of square wave cycles to get the period
* of a square wave cycle.
* 3. Divide by 2*(int_out.fields.count+1), which is the formula
* by which the IOC4 generates the square wave, to get the
* period of an IOC4 INT_OUT count.
*/
period = (end - start) /
(IOC4_CALIBRATE_CYCLES * 2 * (IOC4_CALIBRATE_COUNT + 1));
/* Bounds check the result. */
if (period > IOC4_CALIBRATE_LOW_LIMIT ||
period < IOC4_CALIBRATE_HIGH_LIMIT) {
printk(KERN_INFO
"IOC4 %s: Clock calibration failed. Assuming"
"PCI clock is %d ns.\n",
pci_name(idd->idd_pdev),
IOC4_CALIBRATE_DEFAULT / IOC4_EXTINT_COUNT_DIVISOR);
period = IOC4_CALIBRATE_DEFAULT;
} else {
u64 ns = period;
do_div(ns, IOC4_EXTINT_COUNT_DIVISOR);
printk(KERN_DEBUG
"IOC4 %s: PCI clock is %llu ns.\n",
pci_name(idd->idd_pdev), (unsigned long long)ns);
}
/* Remember results. We store the extint clock period rather
* than the PCI clock period so that greater precision is
* retained. Divide by IOC4_EXTINT_COUNT_DIVISOR to get
* PCI clock period.
*/
idd->count_period = period;
}
/* There are three variants of IOC4 cards: IO9, IO10, and PCI-RT.
* Each brings out different combinations of IOC4 signals, thus.
* the IOC4 subdrivers need to know to which we're attached.
*
* We look for the presence of a SCSI (IO9) or SATA (IO10) controller
* on the same PCI bus at slot number 3 to differentiate IO9 from IO10.
* If neither is present, it's a PCI-RT.
*/
static unsigned int
ioc4_variant(struct ioc4_driver_data *idd)
{
struct pci_dev *pdev = NULL;
int found = 0;
/* IO9: Look for a QLogic ISP 12160 at the same bus and slot 3. */
do {
pdev = pci_get_device(PCI_VENDOR_ID_QLOGIC,
PCI_DEVICE_ID_QLOGIC_ISP12160, pdev);
if (pdev &&
idd->idd_pdev->bus->number == pdev->bus->number &&
3 == PCI_SLOT(pdev->devfn))
found = 1;
} while (pdev && !found);
if (NULL != pdev) {
pci_dev_put(pdev);
return IOC4_VARIANT_IO9;
}
/* IO10: Look for a Vitesse VSC 7174 at the same bus and slot 3. */
pdev = NULL;
do {
pdev = pci_get_device(PCI_VENDOR_ID_VITESSE,
PCI_DEVICE_ID_VITESSE_VSC7174, pdev);
if (pdev &&
idd->idd_pdev->bus->number == pdev->bus->number &&
3 == PCI_SLOT(pdev->devfn))
found = 1;
} while (pdev && !found);
if (NULL != pdev) {
pci_dev_put(pdev);
return IOC4_VARIANT_IO10;
}
/* PCI-RT: No SCSI/SATA controller will be present */
return IOC4_VARIANT_PCI_RT;
}
static void
ioc4_load_modules(struct work_struct *work)
{
request_module("sgiioc4");
}
static DECLARE_WORK(ioc4_load_modules_work, ioc4_load_modules);
/* Adds a new instance of an IOC4 card */
static int
ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
{
struct ioc4_driver_data *idd;
struct ioc4_submodule *is;
uint32_t pcmd;
int ret;
/* Enable IOC4 and take ownership of it */
if ((ret = pci_enable_device(pdev))) {
printk(KERN_WARNING
"%s: Failed to enable IOC4 device for pci_dev %s.\n",
__func__, pci_name(pdev));
goto out;
}
pci_set_master(pdev);
/* Set up per-IOC4 data */
idd = kmalloc(sizeof(struct ioc4_driver_data), GFP_KERNEL);
if (!idd) {
printk(KERN_WARNING
"%s: Failed to allocate IOC4 data for pci_dev %s.\n",
__func__, pci_name(pdev));
ret = -ENODEV;
goto out_idd;
}
idd->idd_pdev = pdev;
idd->idd_pci_id = pci_id;
/* Map IOC4 misc registers. These are shared between subdevices
* so the main IOC4 module manages them.
*/
idd->idd_bar0 = pci_resource_start(idd->idd_pdev, 0);
if (!idd->idd_bar0) {
printk(KERN_WARNING
"%s: Unable to find IOC4 misc resource "
"for pci_dev %s.\n",
__func__, pci_name(idd->idd_pdev));
ret = -ENODEV;
goto out_pci;
}
if (!request_mem_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs),
"ioc4_misc")) {
printk(KERN_WARNING
"%s: Unable to request IOC4 misc region "
"for pci_dev %s.\n",
__func__, pci_name(idd->idd_pdev));
ret = -ENODEV;
goto out_pci;
}
idd->idd_misc_regs = ioremap(idd->idd_bar0,
sizeof(struct ioc4_misc_regs));
if (!idd->idd_misc_regs) {
printk(KERN_WARNING
"%s: Unable to remap IOC4 misc region "
"for pci_dev %s.\n",
__func__, pci_name(idd->idd_pdev));
ret = -ENODEV;
goto out_misc_region;
}
/* Failsafe portion of per-IOC4 initialization */
/* Detect card variant */
idd->idd_variant = ioc4_variant(idd);
printk(KERN_INFO "IOC4 %s: %s card detected.\n", pci_name(pdev),
idd->idd_variant == IOC4_VARIANT_IO9 ? "IO9" :
idd->idd_variant == IOC4_VARIANT_PCI_RT ? "PCI-RT" :
idd->idd_variant == IOC4_VARIANT_IO10 ? "IO10" : "unknown");
/* Initialize IOC4 */
pci_read_config_dword(idd->idd_pdev, PCI_COMMAND, &pcmd);
pci_write_config_dword(idd->idd_pdev, PCI_COMMAND,
pcmd | PCI_COMMAND_PARITY | PCI_COMMAND_SERR);
/* Determine PCI clock */
ioc4_clock_calibrate(idd);
/* Disable/clear all interrupts. Need to do this here lest
* one submodule request the shared IOC4 IRQ, but interrupt
* is generated by a different subdevice.
*/
/* Disable */
writel(~0, &idd->idd_misc_regs->other_iec.raw);
writel(~0, &idd->idd_misc_regs->sio_iec);
/* Clear (i.e. acknowledge) */
writel(~0, &idd->idd_misc_regs->other_ir.raw);
writel(~0, &idd->idd_misc_regs->sio_ir);
/* Track PCI-device specific data */
idd->idd_serial_data = NULL;
pci_set_drvdata(idd->idd_pdev, idd);
mutex_lock(&ioc4_mutex);
list_add_tail(&idd->idd_list, &ioc4_devices);
/* Add this IOC4 to all submodules */
list_for_each_entry(is, &ioc4_submodules, is_list) {
if (is->is_probe && is->is_probe(idd)) {
printk(KERN_WARNING
"%s: IOC4 submodule 0x%s probe failed "
"for pci_dev %s.\n",
__func__, module_name(is->is_owner),
pci_name(idd->idd_pdev));
}
}
mutex_unlock(&ioc4_mutex);
/* Request sgiioc4 IDE driver on boards that bring that functionality
* off of IOC4. The root filesystem may be hosted on a drive connected
* to IOC4, so we need to make sure the sgiioc4 driver is loaded as it
* won't be picked up by modprobes due to the ioc4 module owning the
* PCI device.
*/
if (idd->idd_variant != IOC4_VARIANT_PCI_RT) {
/* Request the module from a work procedure as the modprobe
* goes out to a userland helper and that will hang if done
* directly from ioc4_probe().
*/
printk(KERN_INFO "IOC4 loading sgiioc4 submodule\n");
schedule_work(&ioc4_load_modules_work);
}
return 0;
out_misc_region:
release_mem_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs));
out_pci:
kfree(idd);
out_idd:
pci_disable_device(pdev);
out:
return ret;
}
/* Removes a particular instance of an IOC4 card. */
static void
ioc4_remove(struct pci_dev *pdev)
{
struct ioc4_submodule *is;
struct ioc4_driver_data *idd;
idd = pci_get_drvdata(pdev);
/* Remove this IOC4 from all submodules */
mutex_lock(&ioc4_mutex);
list_for_each_entry(is, &ioc4_submodules, is_list) {
if (is->is_remove && is->is_remove(idd)) {
printk(KERN_WARNING
"%s: IOC4 submodule 0x%s remove failed "
"for pci_dev %s.\n",
__func__, module_name(is->is_owner),
pci_name(idd->idd_pdev));
}
}
mutex_unlock(&ioc4_mutex);
/* Release resources */
iounmap(idd->idd_misc_regs);
if (!idd->idd_bar0) {
printk(KERN_WARNING
"%s: Unable to get IOC4 misc mapping for pci_dev %s. "
"Device removal may be incomplete.\n",
__func__, pci_name(idd->idd_pdev));
}
release_mem_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs));
/* Disable IOC4 and relinquish */
pci_disable_device(pdev);
/* Remove and free driver data */
mutex_lock(&ioc4_mutex);
list_del(&idd->idd_list);
mutex_unlock(&ioc4_mutex);
kfree(idd);
}
static const struct pci_device_id ioc4_id_table[] = {
{PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC4, PCI_ANY_ID,
PCI_ANY_ID, 0x0b4000, 0xFFFFFF},
{0}
};
static struct pci_driver ioc4_driver = {
.name = "IOC4",
.id_table = ioc4_id_table,
.probe = ioc4_probe,
.remove = ioc4_remove,
};
MODULE_DEVICE_TABLE(pci, ioc4_id_table);
/*********************
* Module management *
*********************/
/* Module load */
static int __init
ioc4_init(void)
{
return pci_register_driver(&ioc4_driver);
}
/* Module unload */
static void __exit
ioc4_exit(void)
{
/* Ensure ioc4_load_modules() has completed before exiting */
flush_work(&ioc4_load_modules_work);
pci_unregister_driver(&ioc4_driver);
}
module_init(ioc4_init);
module_exit(ioc4_exit);
MODULE_AUTHOR("Brent Casavant - Silicon Graphics, Inc. <bcasavan@sgi.com>");
MODULE_DESCRIPTION("PCI driver master module for SGI IOC4 Base-IO Card");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(ioc4_register_submodule);
EXPORT_SYMBOL(ioc4_unregister_submodule);

184
include/linux/ioc4.h
View File

@ -1,184 +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.
*
* Copyright (c) 2005 Silicon Graphics, Inc. All Rights Reserved.
*/
#ifndef _LINUX_IOC4_H
#define _LINUX_IOC4_H
#include <linux/interrupt.h>
/***************
* Definitions *
***************/
/* Miscellaneous values inherent to hardware */
#define IOC4_EXTINT_COUNT_DIVISOR 520 /* PCI clocks per COUNT tick */
/***********************************
* Structures needed by subdrivers *
***********************************/
/* This structure fully describes the IOC4 miscellaneous registers which
* appear at bar[0]+0x00000 through bar[0]+0x0005c. The corresponding
* PCI resource is managed by the main IOC4 driver because it contains
* registers of interest to many different IOC4 subdrivers.
*/
struct ioc4_misc_regs {
/* Miscellaneous IOC4 registers */
union ioc4_pci_err_addr_l {
uint32_t raw;
struct {
uint32_t valid:1; /* Address captured */
uint32_t master_id:4; /* Unit causing error
* 0/1: Serial port 0 TX/RX
* 2/3: Serial port 1 TX/RX
* 4/5: Serial port 2 TX/RX
* 6/7: Serial port 3 TX/RX
* 8: ATA/ATAPI
* 9-15: Undefined
*/
uint32_t mul_err:1; /* Multiple errors occurred */
uint32_t addr:26; /* Bits 31-6 of error addr */
} fields;
} pci_err_addr_l;
uint32_t pci_err_addr_h; /* Bits 63-32 of error addr */
union ioc4_sio_int {
uint32_t raw;
struct {
uint8_t tx_mt:1; /* TX ring buffer empty */
uint8_t rx_full:1; /* RX ring buffer full */
uint8_t rx_high:1; /* RX high-water exceeded */
uint8_t rx_timer:1; /* RX timer has triggered */
uint8_t delta_dcd:1; /* DELTA_DCD seen */
uint8_t delta_cts:1; /* DELTA_CTS seen */
uint8_t intr_pass:1; /* Interrupt pass-through */
uint8_t tx_explicit:1; /* TX, MCW, or delay complete */
} fields[4];
} sio_ir; /* Serial interrupt state */
union ioc4_other_int {
uint32_t raw;
struct {
uint32_t ata_int:1; /* ATA port passthru */
uint32_t ata_memerr:1; /* ATA halted by mem error */
uint32_t memerr:4; /* Serial halted by mem err */
uint32_t kbd_int:1; /* kbd/mouse intr asserted */
uint32_t reserved:16; /* zero */
uint32_t rt_int:1; /* INT_OUT section latch */
uint32_t gen_int:8; /* Intr. from generic pins */
} fields;
} other_ir; /* Other interrupt state */
union ioc4_sio_int sio_ies; /* Serial interrupt enable set */
union ioc4_other_int other_ies; /* Other interrupt enable set */
union ioc4_sio_int sio_iec; /* Serial interrupt enable clear */
union ioc4_other_int other_iec; /* Other interrupt enable clear */
union ioc4_sio_cr {
uint32_t raw;
struct {
uint32_t cmd_pulse:4; /* Bytebus strobe width */
uint32_t arb_diag:3; /* PCI bus requester */
uint32_t sio_diag_idle:1; /* Active ser req? */
uint32_t ata_diag_idle:1; /* Active ATA req? */
uint32_t ata_diag_active:1; /* ATA req is winner */
uint32_t reserved:22; /* zero */
} fields;
} sio_cr;
uint32_t unused1;
union ioc4_int_out {
uint32_t raw;
struct {
uint32_t count:16; /* Period control */
uint32_t mode:3; /* Output signal shape */
uint32_t reserved:11; /* zero */
uint32_t diag:1; /* Timebase control */
uint32_t int_out:1; /* Current value */
} fields;
} int_out; /* External interrupt output control */
uint32_t unused2;
union ioc4_gpcr {
uint32_t raw;
struct {
uint32_t dir:8; /* Pin direction */
uint32_t edge:8; /* Edge/level mode */
uint32_t reserved1:4; /* zero */
uint32_t int_out_en:1; /* INT_OUT enable */
uint32_t reserved2:11; /* zero */
} fields;
} gpcr_s; /* Generic PIO control set */
union ioc4_gpcr gpcr_c; /* Generic PIO control clear */
union ioc4_gpdr {
uint32_t raw;
struct {
uint32_t gen_pin:8; /* State of pins */
uint32_t reserved:24;
} fields;
} gpdr; /* Generic PIO data */
uint32_t unused3;
union ioc4_gppr {
uint32_t raw;
struct {
uint32_t gen_pin:1; /* Single pin state */
uint32_t reserved:31;
} fields;
} gppr[8]; /* Generic PIO pins */
};
/* Masks for GPCR DIR pins */
#define IOC4_GPCR_DIR_0 0x01 /* External interrupt output */
#define IOC4_GPCR_DIR_1 0x02 /* External interrupt input */
#define IOC4_GPCR_DIR_2 0x04
#define IOC4_GPCR_DIR_3 0x08 /* Keyboard/mouse presence */
#define IOC4_GPCR_DIR_4 0x10 /* Ser. port 0 xcvr select (0=232, 1=422) */
#define IOC4_GPCR_DIR_5 0x20 /* Ser. port 1 xcvr select (0=232, 1=422) */
#define IOC4_GPCR_DIR_6 0x40 /* Ser. port 2 xcvr select (0=232, 1=422) */
#define IOC4_GPCR_DIR_7 0x80 /* Ser. port 3 xcvr select (0=232, 1=422) */
/* Masks for GPCR EDGE pins */
#define IOC4_GPCR_EDGE_0 0x01
#define IOC4_GPCR_EDGE_1 0x02 /* External interrupt input */
#define IOC4_GPCR_EDGE_2 0x04
#define IOC4_GPCR_EDGE_3 0x08
#define IOC4_GPCR_EDGE_4 0x10
#define IOC4_GPCR_EDGE_5 0x20
#define IOC4_GPCR_EDGE_6 0x40
#define IOC4_GPCR_EDGE_7 0x80
#define IOC4_VARIANT_IO9 0x0900
#define IOC4_VARIANT_PCI_RT 0x0901
#define IOC4_VARIANT_IO10 0x1000
/* One of these per IOC4 */
struct ioc4_driver_data {
struct list_head idd_list;
unsigned long idd_bar0;
struct pci_dev *idd_pdev;
const struct pci_device_id *idd_pci_id;
struct ioc4_misc_regs __iomem *idd_misc_regs;
unsigned long count_period;
void *idd_serial_data;
unsigned int idd_variant;
};
/* One per submodule */
struct ioc4_submodule {
struct list_head is_list;
char *is_name;
struct module *is_owner;
int (*is_probe) (struct ioc4_driver_data *);
int (*is_remove) (struct ioc4_driver_data *);
};
#define IOC4_NUM_CARDS 8 /* max cards per partition */
/**********************************
* Functions needed by submodules *
**********************************/
extern int ioc4_register_submodule(struct ioc4_submodule *);
extern void ioc4_unregister_submodule(struct ioc4_submodule *);
#endif /* _LINUX_IOC4_H */

1
include/linux/pci_ids.h
View File

@ -1070,7 +1070,6 @@
#define PCI_VENDOR_ID_SGI 0x10a9
#define PCI_DEVICE_ID_SGI_IOC3 0x0003
#define PCI_DEVICE_ID_SGI_LITHIUM 0x1002
#define PCI_DEVICE_ID_SGI_IOC4 0x100a
#define PCI_VENDOR_ID_WINBOND 0x10ad
#define PCI_DEVICE_ID_WINBOND_82C105 0x0105