Commit e84de0c6 authored by Thomas Bogendoerfer's avatar Thomas Bogendoerfer Committed by Ralf Baechle

MIPS: GIO bus support for SGI IP22/28

SGI IP22/IP28 machines have GIO busses for adding graphics and other
extension cards. This patch adds support for GIO driver/device
handling and converts the newport console driver to a GIO driver.

[ralf@linux-mips.org: Fixed build error caused by the modules.h -> export.h
changes.]
Signed-off-by: default avatarThomas Bogendoerfer <tsbogend@alpha.franken.de>
Acked-by: default avatarFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
To: linux-fbdev@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2886/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 5611cc45
#include <linux/device.h>
#include <linux/mod_devicetable.h>
struct gio_device_id {
__u8 id;
};
struct gio_device {
struct device dev;
struct resource resource;
unsigned int irq;
unsigned int slotno;
const char *name;
struct gio_device_id id;
unsigned id32:1;
unsigned gio64:1;
};
#define to_gio_device(d) container_of(d, struct gio_device, dev)
struct gio_driver {
const char *name;
struct module *owner;
const struct gio_device_id *id_table;
int (*probe)(struct gio_device *, const struct gio_device_id *);
void (*remove)(struct gio_device *);
int (*suspend)(struct gio_device *, pm_message_t);
int (*resume)(struct gio_device *);
void (*shutdown)(struct gio_device *);
struct device_driver driver;
};
#define to_gio_driver(drv) container_of(drv, struct gio_driver, driver)
extern const struct gio_device_id *gio_match_device(const struct gio_device_id *,
const struct gio_device *);
extern struct gio_device *gio_dev_get(struct gio_device *);
extern void gio_dev_put(struct gio_device *);
extern int gio_device_register(struct gio_device *);
extern void gio_device_unregister(struct gio_device *);
extern void gio_release_dev(struct device *);
static inline void gio_device_free(struct gio_device *dev)
{
gio_release_dev(&dev->dev);
}
extern int gio_register_driver(struct gio_driver *);
extern void gio_unregister_driver(struct gio_driver *);
#define gio_get_drvdata(_dev) drv_get_drvdata(&(_dev)->dev)
#define gio_set_drvdata(_dev, data) drv_set_drvdata(&(_dev)->dev, (data))
extern void gio_set_master(struct gio_device *);
......@@ -4,7 +4,7 @@
#
obj-y += ip22-mc.o ip22-hpc.o ip22-int.o ip22-time.o ip22-nvram.o \
ip22-platform.o ip22-reset.o ip22-setup.o
ip22-platform.o ip22-reset.o ip22-setup.o ip22-gio.o
obj-$(CONFIG_SGI_IP22) += ip22-berr.o
obj-$(CONFIG_SGI_IP28) += ip28-berr.o
......
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <asm/addrspace.h>
#include <asm/paccess.h>
#include <asm/gio_device.h>
#include <asm/sgi/gio.h>
#include <asm/sgi/hpc3.h>
#include <asm/sgi/mc.h>
#include <asm/sgi/ip22.h>
static struct bus_type gio_bus_type;
static struct {
const char *name;
__u8 id;
} gio_name_table[] = {
{ .name = "SGI Impact", .id = 0x10 },
{ .name = "Phobos G160", .id = 0x35 },
/* fake IDs */
{ .name = "SGI Newport", .id = 0x7e },
{ .name = "SGI GR2/GR3", .id = 0x7f },
};
static struct device gio_bus = {
.init_name = "gio",
};
/**
* gio_match_device - Tell if an of_device structure has a matching
* gio_match structure
* @ids: array of of device match structures to search in
* @dev: the of device structure to match against
*
* Used by a driver to check whether an of_device present in the
* system is in its list of supported devices.
*/
const struct gio_device_id *gio_match_device(const struct gio_device_id *match,
const struct gio_device *dev)
{
const struct gio_device_id *ids;
for (ids = match; ids->id != 0xff; ids++)
if (ids->id == dev->id.id)
return ids;
return NULL;
}
EXPORT_SYMBOL_GPL(gio_match_device);
struct gio_device *gio_dev_get(struct gio_device *dev)
{
struct device *tmp;
if (!dev)
return NULL;
tmp = get_device(&dev->dev);
if (tmp)
return to_gio_device(tmp);
else
return NULL;
}
EXPORT_SYMBOL_GPL(gio_dev_get);
void gio_dev_put(struct gio_device *dev)
{
if (dev)
put_device(&dev->dev);
}
EXPORT_SYMBOL_GPL(gio_dev_put);
/**
* gio_release_dev - free an gio device structure when all users of it are finished.
* @dev: device that's been disconnected
*
* Will be called only by the device core when all users of this gio device are
* done.
*/
void gio_release_dev(struct device *dev)
{
struct gio_device *giodev;
giodev = to_gio_device(dev);
kfree(giodev);
}
EXPORT_SYMBOL_GPL(gio_release_dev);
int gio_device_register(struct gio_device *giodev)
{
giodev->dev.bus = &gio_bus_type;
giodev->dev.parent = &gio_bus;
return device_register(&giodev->dev);
}
EXPORT_SYMBOL_GPL(gio_device_register);
void gio_device_unregister(struct gio_device *giodev)
{
device_unregister(&giodev->dev);
}
EXPORT_SYMBOL_GPL(gio_device_unregister);
static int gio_bus_match(struct device *dev, struct device_driver *drv)
{
struct gio_device *gio_dev = to_gio_device(dev);
struct gio_driver *gio_drv = to_gio_driver(drv);
return gio_match_device(gio_drv->id_table, gio_dev) != NULL;
}
static int gio_device_probe(struct device *dev)
{
int error = -ENODEV;
struct gio_driver *drv;
struct gio_device *gio_dev;
const struct gio_device_id *match;
drv = to_gio_driver(dev->driver);
gio_dev = to_gio_device(dev);
if (!drv->probe)
return error;
gio_dev_get(gio_dev);
match = gio_match_device(drv->id_table, gio_dev);
if (match)
error = drv->probe(gio_dev, match);
if (error)
gio_dev_put(gio_dev);
return error;
}
static int gio_device_remove(struct device *dev)
{
struct gio_device *gio_dev = to_gio_device(dev);
struct gio_driver *drv = to_gio_driver(dev->driver);
if (dev->driver && drv->remove)
drv->remove(gio_dev);
return 0;
}
static int gio_device_suspend(struct device *dev, pm_message_t state)
{
struct gio_device *gio_dev = to_gio_device(dev);
struct gio_driver *drv = to_gio_driver(dev->driver);
int error = 0;
if (dev->driver && drv->suspend)
error = drv->suspend(gio_dev, state);
return error;
}
static int gio_device_resume(struct device *dev)
{
struct gio_device *gio_dev = to_gio_device(dev);
struct gio_driver *drv = to_gio_driver(dev->driver);
int error = 0;
if (dev->driver && drv->resume)
error = drv->resume(gio_dev);
return error;
}
static void gio_device_shutdown(struct device *dev)
{
struct gio_device *gio_dev = to_gio_device(dev);
struct gio_driver *drv = to_gio_driver(dev->driver);
if (dev->driver && drv->shutdown)
drv->shutdown(gio_dev);
}
static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
char *buf)
{
struct gio_device *gio_dev = to_gio_device(dev);
int len = snprintf(buf, PAGE_SIZE, "gio:%x\n", gio_dev->id.id);
return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
}
static ssize_t name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gio_device *giodev;
giodev = to_gio_device(dev);
return sprintf(buf, "%s", giodev->name);
}
static ssize_t id_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gio_device *giodev;
giodev = to_gio_device(dev);
return sprintf(buf, "%x", giodev->id.id);
}
static struct device_attribute gio_dev_attrs[] = {
__ATTR_RO(modalias),
__ATTR_RO(name),
__ATTR_RO(id),
__ATTR_NULL,
};
static int gio_device_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct gio_device *gio_dev = to_gio_device(dev);
add_uevent_var(env, "MODALIAS=gio:%x", gio_dev->id.id);
return 0;
}
int gio_register_driver(struct gio_driver *drv)
{
/* initialize common driver fields */
if (!drv->driver.name)
drv->driver.name = drv->name;
if (!drv->driver.owner)
drv->driver.owner = drv->owner;
drv->driver.bus = &gio_bus_type;
/* register with core */
return driver_register(&drv->driver);
}
EXPORT_SYMBOL_GPL(gio_register_driver);
void gio_unregister_driver(struct gio_driver *drv)
{
driver_unregister(&drv->driver);
}
EXPORT_SYMBOL_GPL(gio_unregister_driver);
void gio_set_master(struct gio_device *dev)
{
u32 tmp = sgimc->giopar;
switch (dev->slotno) {
case 0:
tmp |= SGIMC_GIOPAR_MASTERGFX;
break;
case 1:
tmp |= SGIMC_GIOPAR_MASTEREXP0;
break;
case 2:
tmp |= SGIMC_GIOPAR_MASTEREXP1;
break;
}
sgimc->giopar = tmp;
}
EXPORT_SYMBOL_GPL(gio_set_master);
void ip22_gio_set_64bit(int slotno)
{
u32 tmp = sgimc->giopar;
switch (slotno) {
case 0:
tmp |= SGIMC_GIOPAR_GFX64;
break;
case 1:
tmp |= SGIMC_GIOPAR_EXP064;
break;
case 2:
tmp |= SGIMC_GIOPAR_EXP164;
break;
}
sgimc->giopar = tmp;
}
static int ip22_gio_id(unsigned long addr, u32 *res)
{
u8 tmp8;
u8 tmp16;
u32 tmp32;
u8 *ptr8;
u16 *ptr16;
u32 *ptr32;
ptr32 = (void *)CKSEG1ADDR(addr);
if (!get_dbe(tmp32, ptr32)) {
/*
* We got no DBE, but this doesn't mean anything.
* If GIO is pipelined (which can't be disabled
* for GFX slot) we don't get a DBE, but we see
* the transfer size as data. So we do an 8bit
* and a 16bit access and check whether the common
* data matches
*/
ptr8 = (void *)CKSEG1ADDR(addr + 3);
get_dbe(tmp8, ptr8);
ptr16 = (void *)CKSEG1ADDR(addr + 2);
get_dbe(tmp16, ptr16);
if (tmp8 == (tmp16 & 0xff) &&
tmp8 == (tmp32 & 0xff) &&
tmp16 == (tmp32 & 0xffff)) {
*res = tmp32;
return 1;
}
}
return 0; /* nothing here */
}
#define HQ2_MYSTERY_OFFS 0x6A07C
#define NEWPORT_USTATUS_OFFS 0xF133C
static int ip22_is_gr2(unsigned long addr)
{
u32 tmp;
u32 *ptr;
/* HQ2 only allows 32bit accesses */
ptr = (void *)CKSEG1ADDR(addr + HQ2_MYSTERY_OFFS);
if (!get_dbe(tmp, ptr)) {
if (tmp == 0xdeadbeef)
return 1;
}
return 0;
}
static void ip22_check_gio(int slotno, unsigned long addr)
{
const char *name = "Unknown";
struct gio_device *gio_dev;
u32 tmp;
__u8 id;
int i;
/* first look for GR2/GR3 by checking mystery register */
if (ip22_is_gr2(addr))
tmp = 0x7f;
else {
if (!ip22_gio_id(addr, &tmp)) {
/*
* no GIO signature at start address of slot, but
* Newport doesn't have one, so let's check usea
* status register
*/
if (ip22_gio_id(addr + NEWPORT_USTATUS_OFFS, &tmp))
tmp = 0x7e;
else
tmp = 0;
}
}
if (tmp) {
id = GIO_ID(tmp);
if (tmp & GIO_32BIT_ID) {
if (tmp & GIO_64BIT_IFACE)
ip22_gio_set_64bit(slotno);
}
for (i = 0; i < ARRAY_SIZE(gio_name_table); i++) {
if (id == gio_name_table[i].id) {
name = gio_name_table[i].name;
break;
}
}
printk(KERN_INFO "GIO: slot %d : %s (id %x)\n",
slotno, name, id);
gio_dev = kzalloc(sizeof *gio_dev, GFP_KERNEL);
gio_dev->name = name;
gio_dev->slotno = slotno;
gio_dev->id.id = id;
gio_dev->resource.start = addr;
gio_dev->resource.end = addr + 0x3fffff;
gio_dev->resource.flags = IORESOURCE_MEM;
dev_set_name(&gio_dev->dev, "%d", slotno);
gio_device_register(gio_dev);
} else
printk(KERN_INFO "GIO: slot %d : Empty\n", slotno);
}
static struct bus_type gio_bus_type = {
.name = "gio",
.dev_attrs = gio_dev_attrs,
.match = gio_bus_match,
.probe = gio_device_probe,
.remove = gio_device_remove,
.suspend = gio_device_suspend,
.resume = gio_device_resume,
.shutdown = gio_device_shutdown,
.uevent = gio_device_uevent,
};
static struct resource gio_bus_resource = {
.start = GIO_SLOT_GFX_BASE,
.end = GIO_SLOT_GFX_BASE + 0x9fffff,
.name = "GIO Bus",
.flags = IORESOURCE_MEM,
};
int __init ip22_gio_init(void)
{
unsigned int pbdma __maybe_unused;
int ret;
ret = device_register(&gio_bus);
if (ret)
return ret;
ret = bus_register(&gio_bus_type);
if (!ret) {
request_resource(&iomem_resource, &gio_bus_resource);
printk(KERN_INFO "GIO: Probing bus...\n");
if (ip22_is_fullhouse() ||
!get_dbe(pbdma, (unsigned int *)&hpc3c1->pbdma[1])) {
/* Indigo2 and ChallengeS */
ip22_check_gio(0, GIO_SLOT_GFX_BASE);
ip22_check_gio(1, GIO_SLOT_EXP0_BASE);
} else {
/* Indy */
ip22_check_gio(0, GIO_SLOT_GFX_BASE);
ip22_check_gio(1, GIO_SLOT_EXP0_BASE);
ip22_check_gio(2, GIO_SLOT_EXP1_BASE);
}
} else
device_unregister(&gio_bus);
return ret;
}
subsys_initcall(ip22_gio_init);
......@@ -139,11 +139,11 @@ void __init sgimc_init(void)
* zero.
*/
/* don't touch parity settings for IP28 */
#ifndef CONFIG_SGI_IP28
tmp = sgimc->cpuctrl0;
tmp |= (SGIMC_CCTRL0_EPERRGIO | SGIMC_CCTRL0_EPERRMEM |
SGIMC_CCTRL0_R4KNOCHKPARR);
#ifndef CONFIG_SGI_IP28
tmp |= SGIMC_CCTRL0_EPERRGIO | SGIMC_CCTRL0_EPERRMEM;
#endif
tmp |= SGIMC_CCTRL0_R4KNOCHKPARR;
sgimc->cpuctrl0 = tmp;
/* Step 3: Setup the MC write buffer depth, this is controlled
......@@ -178,7 +178,8 @@ void __init sgimc_init(void)
*/
/* First the basic invariants across all GIO64 implementations. */
tmp = SGIMC_GIOPAR_HPC64; /* All 1st HPC's interface at 64bits */
tmp = sgimc->giopar & SGIMC_GIOPAR_GFX64; /* keep gfx 64bit settings */
tmp |= SGIMC_GIOPAR_HPC64; /* All 1st HPC's interface at 64bits */
tmp |= SGIMC_GIOPAR_ONEBUS; /* Only one physical GIO bus exists */
if (ip22_is_fullhouse()) {
......@@ -193,7 +194,6 @@ void __init sgimc_init(void)
tmp |= SGIMC_GIOPAR_PLINEEXP0; /* exp[01] pipelined */
tmp |= SGIMC_GIOPAR_PLINEEXP1;
tmp |= SGIMC_GIOPAR_MASTEREISA; /* EISA masters */
tmp |= SGIMC_GIOPAR_GFX64; /* GFX at 64 bits */
}
} else {
/* Guiness specific settings. */
......
......@@ -26,9 +26,6 @@
#include <asm/sgi/hpc3.h>
#include <asm/sgi/ip22.h>
unsigned long sgi_gfxaddr;
EXPORT_SYMBOL_GPL(sgi_gfxaddr);
extern void ip22_be_init(void) __init;
void __init plat_mem_setup(void)
......@@ -78,22 +75,4 @@ void __init plat_mem_setup(void)
prom_flags |= PROM_FLAG_USE_AS_CONSOLE;
add_preferred_console("arc", 0, NULL);
}
#if defined(CONFIG_VT) && defined(CONFIG_SGI_NEWPORT_CONSOLE)
{
ULONG *gfxinfo;
ULONG * (*__vec)(void) = (void *) (long)
*((_PULONG *)(long)((PROMBLOCK)->pvector + 0x20));
gfxinfo = __vec();
sgi_gfxaddr = ((gfxinfo[1] >= 0xa0000000
&& gfxinfo[1] <= 0xc0000000)
? gfxinfo[1] - 0xa0000000 : 0);
/* newport addresses? */
if (sgi_gfxaddr == 0x1f0f0000 || sgi_gfxaddr == 0x1f4f0000) {
conswitchp = &newport_con;
}
}
#endif
}
......@@ -25,14 +25,13 @@
#include <asm/system.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/gio_device.h>
#include <video/newport.h>
#include <linux/linux_logo.h>
#include <linux/font.h>
extern unsigned long sgi_gfxaddr;
#define FONT_DATA ((unsigned char *)font_vga_8x16.data)
/* borrowed from fbcon.c */
......@@ -304,12 +303,6 @@ static const char *newport_startup(void)
{
int i;
if (!sgi_gfxaddr)
return NULL;
if (!npregs)
npregs = (struct newport_regs *)/* ioremap cannot fail */
ioremap(sgi_gfxaddr, sizeof(struct newport_regs));
npregs->cset.config = NPORT_CFG_GD0;
if (newport_wait(npregs))
......@@ -743,26 +736,58 @@ const struct consw newport_con = {
.con_save_screen = DUMMY
};
#ifdef MODULE
static int __init newport_console_init(void)
static int newport_probe(struct gio_device *dev,
const struct gio_device_id *id)
{
if (!sgi_gfxaddr)
return 0;
unsigned long newport_addr;
if (!npregs)
npregs = (struct newport_regs *)/* ioremap cannot fail */
ioremap(sgi_gfxaddr, sizeof(struct newport_regs));
if (!dev->resource.start)
return -EINVAL;
if (npregs)
return -EBUSY; /* we only support one Newport as console */
newport_addr = dev->resource.start + 0xF0000;
if (!request_mem_region(newport_addr, 0x10000, "Newport"))
return -ENODEV;
npregs = (struct newport_regs *)/* ioremap cannot fail */
ioremap(newport_addr, sizeof(struct newport_regs));
return take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
}
module_init(newport_console_init);
static void __exit newport_console_exit(void)
static void newport_remove(struct gio_device *dev)
{
give_up_console(&newport_con);
iounmap((void *)npregs);
}
static struct gio_device_id newport_ids[] = {
{ .id = 0x7e },
{ .id = 0xff }
};
MODULE_ALIAS("gio:7e");
static struct gio_driver newport_driver = {
.name = "newport",
.id_table = newport_ids,
.probe = newport_probe,
.remove = newport_remove,
};
int __init newport_console_init(void)
{
return gio_register_driver(&newport_driver);
}
void __exit newport_console_exit(void)
{
gio_unregister_driver(&newport_driver);
}
module_init(newport_console_init);
module_exit(newport_console_exit);
#endif
MODULE_LICENSE("GPL");
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