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.
Signed-off-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Acked-by: Florian Tobias Schandinat <FlorianSchandinat@xxxxxx>
---
Changes in v3:
- reworked device tree for gio bus
- make module autoloading working
Changes in v2:
- use EXPORT_SYMBOL_GPL
- ChallengeS has only 2 slots
- use subsys_initcall for gio detection
arch/mips/include/asm/gio_device.h | 56 +++++
arch/mips/sgi-ip22/Makefile | 2 +-
arch/mips/sgi-ip22/ip22-gio.c | 428 +++++++++++++++++++++++++++++++++++
arch/mips/sgi-ip22/ip22-mc.c | 10 +-
arch/mips/sgi-ip22/ip22-setup.c | 21 --
drivers/video/console/newport_con.c | 63 ++++--
6 files changed, 534 insertions(+), 46 deletions(-)
diff --git a/arch/mips/include/asm/gio_device.h b/arch/mips/include/asm/gio_device.h
new file mode 100644
index 0000000..5437c84
--- /dev/null
+++ b/arch/mips/include/asm/gio_device.h
@@ -0,0 +1,56 @@
+#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 *);
diff --git a/arch/mips/sgi-ip22/Makefile b/arch/mips/sgi-ip22/Makefile
index cc53849..411cda9 100644
--- a/arch/mips/sgi-ip22/Makefile
+++ b/arch/mips/sgi-ip22/Makefile
@@ -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
diff --git a/arch/mips/sgi-ip22/ip22-gio.c b/arch/mips/sgi-ip22/ip22-gio.c
new file mode 100644
index 0000000..b6537d9
--- /dev/null
+++ b/arch/mips/sgi-ip22/ip22-gio.c
@@ -0,0 +1,428 @@
+#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);
+
diff --git a/arch/mips/sgi-ip22/ip22-mc.c b/arch/mips/sgi-ip22/ip22-mc.c
index d22262e..75ada8a 100644
--- a/arch/mips/sgi-ip22/ip22-mc.c
+++ b/arch/mips/sgi-ip22/ip22-mc.c
@@ -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. */
diff --git a/arch/mips/sgi-ip22/ip22-setup.c b/arch/mips/sgi-ip22/ip22-setup.c
index 5e66213..c7bdfe4 100644
--- a/arch/mips/sgi-ip22/ip22-setup.c
+++ b/arch/mips/sgi-ip22/ip22-setup.c
@@ -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
}
diff --git a/drivers/video/console/newport_con.c b/drivers/video/console/newport_con.c
index 93317b5..a122d92 100644
--- a/drivers/video/console/newport_con.c
+++ b/drivers/video/console/newport_con.c
@@ -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");
