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Subject[PATCH] visws: pci support (8/13)
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Hi.

This patch contains update of pci support for visws.

Please consider applying.

Best regards.

--
Andrey Panin | Embedded systems software developer
pazke@orbita1.ru | PGP key: wwwkeys.pgp.net
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/include/linux/pci_ids.h linux-2.5.60/include/linux/pci_ids.h
--- linux-2.5.60.vanilla/include/linux/pci_ids.h Thu Feb 13 20:31:18 2003
+++ linux-2.5.60/include/linux/pci_ids.h Thu Feb 13 20:42:02 2003
@@ -848,6 +848,7 @@

#define PCI_VENDOR_ID_SGI 0x10a9
#define PCI_DEVICE_ID_SGI_IOC3 0x0003
+#define PCI_VENDOR_ID_SGI_LITHIUM 0x1002

#define PCI_VENDOR_ID_ACC 0x10aa
#define PCI_DEVICE_ID_ACC_2056 0x0000
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/mach-visws/pci-visws.c linux-2.5.60/arch/i386/mach-visws/pci-visws.c
--- linux-2.5.60.vanilla/arch/i386/mach-visws/pci-visws.c Thu Feb 13 20:29:07 2003
+++ linux-2.5.60/arch/i386/mach-visws/pci-visws.c Thu Jan 1 03:00:00 1970
@@ -1,141 +0,0 @@
-/*
- * Low-Level PCI Support for SGI Visual Workstation
- *
- * (c) 1999--2000 Martin Mares <mj@ucw.cz>
- */
-
-#include <linux/config.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/irq.h>
-
-#include <asm/smp.h>
-#include <asm/lithium.h>
-#include <asm/io.h>
-
-#include "pci-i386.h"
-
-unsigned int pci_probe = 0;
-
-/*
- * The VISWS uses configuration access type 1 only.
- */
-
-#define CONFIG_CMD(dev, where) (0x80000000 | (dev->bus->number << 16) | (dev->devfn << 8) | (where & ~3))
-
-static int pci_conf1_read_config_byte(struct pci_dev *dev, int where, u8 *value)
-{
- outl(CONFIG_CMD(dev,where), 0xCF8);
- *value = inb(0xCFC + (where&3));
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_conf1_read_config_word(struct pci_dev *dev, int where, u16 *value)
-{
- outl(CONFIG_CMD(dev,where), 0xCF8);
- *value = inw(0xCFC + (where&2));
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_conf1_read_config_dword(struct pci_dev *dev, int where, u32 *value)
-{
- outl(CONFIG_CMD(dev,where), 0xCF8);
- *value = inl(0xCFC);
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_conf1_write_config_byte(struct pci_dev *dev, int where, u8 value)
-{
- outl(CONFIG_CMD(dev,where), 0xCF8);
- outb(value, 0xCFC + (where&3));
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_conf1_write_config_word(struct pci_dev *dev, int where, u16 value)
-{
- outl(CONFIG_CMD(dev,where), 0xCF8);
- outw(value, 0xCFC + (where&2));
- return PCIBIOS_SUCCESSFUL;
-}
-
-static int pci_conf1_write_config_dword(struct pci_dev *dev, int where, u32 value)
-{
- outl(CONFIG_CMD(dev,where), 0xCF8);
- outl(value, 0xCFC);
- return PCIBIOS_SUCCESSFUL;
-}
-
-#undef CONFIG_CMD
-
-static struct pci_ops visws_pci_ops = {
- pci_conf1_read_config_byte,
- pci_conf1_read_config_word,
- pci_conf1_read_config_dword,
- pci_conf1_write_config_byte,
- pci_conf1_write_config_word,
- pci_conf1_write_config_dword
-};
-
-static void __init pcibios_fixup_irqs(void)
-{
- struct pci_dev *dev, *p;
- u8 pin;
- int irq;
-
- pci_for_each_dev(dev) {
- pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
- dev->irq = 0;
- if (!pin)
- continue;
- pin--;
- if (dev->bus->parent) {
- p = dev->bus->parent->self;
- pin = (pin + PCI_SLOT(dev->devfn)) % 4;
- } else
- p = dev;
- irq = visws_get_PCI_irq_vector(p->bus->number, PCI_SLOT(p->devfn), pin+1);
- if (irq >= 0)
- dev->irq = irq;
- DBG("PCI IRQ: %s pin %d -> %d\n", dev->slot_name, pin, irq);
- }
-}
-
-void __init pcibios_fixup_bus(struct pci_bus *b)
-{
- pci_read_bridge_bases(b);
-}
-
-#if 0
-static struct resource visws_pci_bus_resources[2] = {
- { "Host bus 1", 0xf4000000, 0xf7ffffff, 0 },
- { "Host bus 2", 0xf0000000, 0xf3ffffff, 0 }
-};
-#endif
-
-void __init pcibios_init(void)
-{
- unsigned int sec_bus = li_pcib_read16(LI_PCI_BUSNUM) & 0xff;
-
- printk("PCI: Probing PCI hardware on host buses 00 and %02x\n", sec_bus);
- pci_scan_bus(0, &visws_pci_ops, NULL);
- pci_scan_bus(sec_bus, &visws_pci_ops, NULL);
- pcibios_fixup_irqs();
- pcibios_resource_survey();
-}
-
-char * __init pcibios_setup(char *str)
-{
- return str;
-}
-
-int pcibios_enable_device(struct pci_dev *dev, int mask)
-{
- return pcibios_enable_resources(dev, mask);
-}
-
-void __init pcibios_penalize_isa_irq(irq)
-{
-}
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/pci/Makefile linux-2.5.60/arch/i386/pci/Makefile
--- linux-2.5.60.vanilla/arch/i386/pci/Makefile Thu Feb 13 20:29:07 2003
+++ linux-2.5.60/arch/i386/pci/Makefile Thu Feb 13 20:42:02 2003
@@ -3,6 +3,8 @@
obj-$(CONFIG_PCI_BIOS) += pcbios.o
obj-$(CONFIG_PCI_DIRECT) += direct.o

+obj-$(CONFIG_X86_VISWS) += visws.o
+
ifdef CONFIG_X86_NUMAQ
obj-y += numa.o
else
@@ -11,8 +13,15 @@
ifdef CONFIG_ACPI_PCI
obj-y += acpi.o
endif
-obj-y += legacy.o

+ifndef CONFIG_X86_VISWS
+obj-y += legacy.o
+endif

endif # CONFIG_X86_NUMAQ
-obj-y += irq.o common.o
+
+ifndef CONFIG_X86_VISWS
+obj-y += irq.o
+endif
+
+obj-y += common.o
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/pci/common.c linux-2.5.60/arch/i386/pci/common.c
--- linux-2.5.60.vanilla/arch/i386/pci/common.c Thu Feb 13 20:29:07 2003
+++ linux-2.5.60/arch/i386/pci/common.c Thu Feb 13 20:42:02 2003
@@ -180,13 +180,8 @@
return NULL;
}
#endif
- else if (!strcmp(str, "rom")) {
- pci_probe |= PCI_ASSIGN_ROMS;
- return NULL;
- } else if (!strcmp(str, "assign-busses")) {
- pci_probe |= PCI_ASSIGN_ALL_BUSSES;
- return NULL;
- } else if (!strcmp(str, "usepirqmask")) {
+#ifndef CONFIG_X86_VISWS
+ else if (!strcmp(str, "usepirqmask")) {
pci_probe |= PCI_USE_PIRQ_MASK;
return NULL;
} else if (!strncmp(str, "irqmask=", 8)) {
@@ -194,6 +189,14 @@
return NULL;
} else if (!strncmp(str, "lastbus=", 8)) {
pcibios_last_bus = simple_strtol(str+8, NULL, 0);
+ return NULL;
+ }
+#endif
+ else if (!strcmp(str, "rom")) {
+ pci_probe |= PCI_ASSIGN_ROMS;
+ return NULL;
+ } else if (!strcmp(str, "assign-busses")) {
+ pci_probe |= PCI_ASSIGN_ALL_BUSSES;
return NULL;
}
return str;
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/pci/direct.c linux-2.5.60/arch/i386/pci/direct.c
--- linux-2.5.60.vanilla/arch/i386/pci/direct.c Thu Feb 13 20:29:07 2003
+++ linux-2.5.60/arch/i386/pci/direct.c Thu Feb 13 20:42:02 2003
@@ -83,7 +83,7 @@
PCI_FUNC(devfn), where, size, value);
}

-static struct pci_ops pci_direct_conf1 = {
+struct pci_ops pci_direct_conf1 = {
.read = pci_conf1_read,
.write = pci_conf1_write,
};
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/pci/visws.c linux-2.5.60/arch/i386/pci/visws.c
--- linux-2.5.60.vanilla/arch/i386/pci/visws.c Thu Jan 1 03:00:00 1970
+++ linux-2.5.60/arch/i386/pci/visws.c Thu Feb 13 20:42:02 2003
@@ -0,0 +1,110 @@
+/*
+ * Low-Level PCI Support for SGI Visual Workstation
+ *
+ * (c) 1999--2000 Martin Mares <mj@ucw.cz>
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+
+#include "cobalt.h"
+#include "lithium.h"
+
+#include "pci.h"
+
+
+int broken_hp_bios_irq9;
+
+extern struct pci_ops pci_direct_conf1;
+
+static int pci_visws_enable_irq(struct pci_dev *dev) { return 0; }
+
+int (*pcibios_enable_irq)(struct pci_dev *dev) = &pci_visws_enable_irq;
+
+void __init pcibios_penalize_isa_irq(int irq) {}
+
+
+unsigned int pci_bus0, pci_bus1;
+
+static inline u8 bridge_swizzle(u8 pin, u8 slot)
+{
+ return (((pin - 1) + slot) % 4) + 1;
+}
+
+static u8 __init visws_swizzle(struct pci_dev *dev, u8 *pinp)
+{
+ u8 pin = *pinp;
+
+ while (dev->bus->self) { /* Move up the chain of bridges. */
+ pin = bridge_swizzle(pin, PCI_SLOT(dev->devfn));
+ dev = dev->bus->self;
+ }
+ *pinp = pin;
+
+ return PCI_SLOT(dev->devfn);
+}
+
+static int __init visws_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+ int irq, bus = dev->bus->number;
+
+ pin--;
+
+ /* Nothing usefull at PIIX4 pin 1 */
+ if (bus == pci_bus0 && slot == 4 && pin == 0)
+ return -1;
+
+ /* PIIX4 USB is on Bus 0, Slot 4, Line 3 */
+ if (bus == pci_bus0 && slot == 4 && pin == 3) {
+ irq = CO_IRQ(CO_APIC_PIIX4_USB);
+ goto out;
+ }
+
+ /* First pin spread down 1 APIC entry per slot */
+ if (pin == 0) {
+ irq = CO_IRQ((bus == pci_bus0 ? CO_APIC_PCIB_BASE0 :
+ CO_APIC_PCIA_BASE0) + slot);
+ goto out;
+ }
+
+ /* lines 1,2,3 from any slot is shared in this twirly pattern */
+ if (bus == pci_bus1) {
+ /* lines 1-3 from devices 0 1 rotate over 2 apic entries */
+ irq = CO_IRQ(CO_APIC_PCIA_BASE123 + ((slot + (pin - 1)) % 2));
+ } else { /* bus == pci_bus0 */
+ /* lines 1-3 from devices 0-3 rotate over 3 apic entries */
+ if (slot == 0)
+ slot = 3; /* same pattern */
+ irq = CO_IRQ(CO_APIC_PCIA_BASE123 + ((3 - slot) + (pin - 1) % 3));
+ }
+out:
+ printk(KERN_DEBUG "PCI: Bus %d Slot %d Line %d -> IRQ %d\n", bus, slot, pin, irq);
+ return irq;
+}
+
+void __init pcibios_update_irq(struct pci_dev *dev, int irq)
+{
+ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
+}
+
+static int __init pcibios_init(void)
+{
+ /* The VISWS supports configuration access type 1 only */
+ pci_probe = (pci_probe | PCI_PROBE_CONF1) &
+ ~(PCI_PROBE_BIOS | PCI_PROBE_CONF2);
+
+ pci_bus0 = li_pcib_read16(LI_PCI_BUSNUM) & 0xff;
+ pci_bus1 = li_pcia_read16(LI_PCI_BUSNUM) & 0xff;
+
+ printk(KERN_INFO "PCI: Lithium bridge A bus: %u, "
+ "bridge B (PIIX4) bus: %u\n", pci_bus1, pci_bus0);
+
+ pci_scan_bus(pci_bus0, &pci_direct_conf1, NULL);
+ pci_scan_bus(pci_bus1, &pci_direct_conf1, NULL);
+ pci_fixup_irqs(visws_swizzle, visws_map_irq);
+ pcibios_resource_survey();
+}
+
+subsys_initcall(pcibios_init);
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/drivers/pci/Makefile linux-2.5.60/drivers/pci/Makefile
--- linux-2.5.60.vanilla/drivers/pci/Makefile Thu Feb 13 20:30:57 2003
+++ linux-2.5.60/drivers/pci/Makefile Thu Feb 13 20:42:02 2003
@@ -22,6 +22,7 @@
obj-$(CONFIG_PPC32) += setup-irq.o
obj-$(CONFIG_DDB5476) += setup-bus.o
obj-$(CONFIG_SGI_IP27) += setup-irq.o
+obj-$(CONFIG_X86_VISWS) += setup-irq.o

# CompactPCI hotplug requires the pbus_* functions
ifdef CONFIG_HOTPLUG_PCI_CPCI
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