sh: Get the SH-5 PCI support building.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 72 insertions, 380 deletions

diff --git a/arch/sh/drivers/pci/pci-sh5.c b/arch/sh/drivers/pci/pci-sh5.c
index b4d9534..a00a4df 100644
--- a/arch/sh/drivers/pci/pci-sh5.c
+++ b/arch/sh/drivers/pci/pci-sh5.c
@@ -18,40 +18,14 @@
 #include <linux/pci.h>
 #include <linux/delay.h>
 #include <linux/types.h>
-#include <asm/pci.h>
 #include <linux/irq.h>
-
+#include <asm/cpu/irq.h>
+#include <asm/pci.h>
 #include <asm/io.h>
-#include <asm/hardware.h>
-#include "pci_sh5.h"
-
-static unsigned long pcicr_virt;
-unsigned long pciio_virt;
-
-static void __init pci_fixup_ide_bases(struct pci_dev *d)
-{
-	int i;
-
-	/*
-	 * PCI IDE controllers use non-standard I/O port decoding, respect it.
-	 */
-	if ((d->class >> 8) != PCI_CLASS_STORAGE_IDE)
-		return;
-	printk("PCI: IDE base address fixup for %s\n", pci_name(d));
-	for(i=0; i<4; i++) {
-		struct resource *r = &d->resource[i];
-		if ((r->start & ~0x80) == 0x374) {
-			r->start |= 2;
-			r->end = r->start;
-		}
-	}
-}
-DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pci_fixup_ide_bases);
+#include "pci-sh5.h"
 
-char * __devinit pcibios_setup(char *str)
-{
-	return str;
-}
+unsigned long pcicr_virt;
+unsigned long PCI_IO_AREA;
 
 /* Rounds a number UP to the nearest power of two. Used for
  * sizing the PCI window.
@@ -79,31 +53,73 @@ static u32 __init r2p2(u32 num)
 	return tmp;
 }
 
-extern unsigned long long memory_start, memory_end;
+static irqreturn_t pcish5_err_irq(int irq, void *dev_id)
+{
+	struct pt_regs *regs = get_irq_regs();
+	unsigned pci_int, pci_air, pci_cir, pci_aint;
+
+	pci_int = SH5PCI_READ(INT);
+	pci_cir = SH5PCI_READ(CIR);
+	pci_air = SH5PCI_READ(AIR);
 
-int __init sh5pci_init(unsigned memStart, unsigned memSize)
+	if (pci_int) {
+		printk("PCI INTERRUPT (at %08llx)!\n", regs->pc);
+		printk("PCI INT -> 0x%x\n", pci_int & 0xffff);
+		printk("PCI AIR -> 0x%x\n", pci_air);
+		printk("PCI CIR -> 0x%x\n", pci_cir);
+		SH5PCI_WRITE(INT, ~0);
+	}
+
+	pci_aint = SH5PCI_READ(AINT);
+	if (pci_aint) {
+		printk("PCI ARB INTERRUPT!\n");
+		printk("PCI AINT -> 0x%x\n", pci_aint);
+		printk("PCI AIR -> 0x%x\n", pci_air);
+		printk("PCI CIR -> 0x%x\n", pci_cir);
+		SH5PCI_WRITE(AINT, ~0);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t pcish5_serr_irq(int irq, void *dev_id)
+{
+	printk("SERR IRQ\n");
+
+	return IRQ_NONE;
+}
+
+int __init sh5pci_init(unsigned long memStart, unsigned long memSize)
 {
 	u32 lsr0;
 	u32 uval;
 
+        if (request_irq(IRQ_ERR, pcish5_err_irq,
+                        IRQF_DISABLED, "PCI Error",NULL) < 0) {
+                printk(KERN_ERR "PCISH5: Cannot hook PCI_PERR interrupt\n");
+                return -EINVAL;
+        }
+
+        if (request_irq(IRQ_SERR, pcish5_serr_irq,
+                        IRQF_DISABLED, "PCI SERR interrupt", NULL) < 0) {
+                printk(KERN_ERR "PCISH5: Cannot hook PCI_SERR interrupt\n");
+                return -EINVAL;
+        }
+
 	pcicr_virt = onchip_remap(SH5PCI_ICR_BASE, 1024, "PCICR");
 	if (!pcicr_virt) {
 		panic("Unable to remap PCICR\n");
 	}
 
-	pciio_virt = onchip_remap(SH5PCI_IO_BASE, 0x10000, "PCIIO");
-	if (!pciio_virt) {
+	PCI_IO_AREA = onchip_remap(SH5PCI_IO_BASE, 0x10000, "PCIIO");
+	if (!PCI_IO_AREA) {
 		panic("Unable to remap PCIIO\n");
 	}
 
-	pr_debug("Register base addres is 0x%08lx\n", pcicr_virt);
-
 	/* Clear snoop registers */
         SH5PCI_WRITE(CSCR0, 0);
         SH5PCI_WRITE(CSCR1, 0);
 
-	pr_debug("Wrote to reg\n");
-
         /* Switch off interrupts */
         SH5PCI_WRITE(INTM,  0);
         SH5PCI_WRITE(AINTM, 0);
@@ -113,16 +129,17 @@ int __init sh5pci_init(unsigned memStart, unsigned memSize)
         uval = SH5PCI_READ(CR);
 
 	/* Set command Register */
-        SH5PCI_WRITE(CR, uval | CR_LOCK_MASK | CR_CFINT| CR_FTO | CR_PFE | CR_PFCS | CR_BMAM);
+        SH5PCI_WRITE(CR, uval | CR_LOCK_MASK | CR_CFINT| CR_FTO | CR_PFE |
+		     CR_PFCS | CR_BMAM);
 
 	uval=SH5PCI_READ(CR);
-        pr_debug("CR is actually 0x%08x\n",uval);
 
         /* Allow it to be a master */
 	/* NB - WE DISABLE I/O ACCESS to stop overlap */
         /* set WAIT bit to enable stepping, an attempt to improve stability */
 	SH5PCI_WRITE_SHORT(CSR_CMD,
-			    PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_WAIT);
+			    PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
+			    PCI_COMMAND_WAIT);
 
         /*
         ** Set translation mapping memory in order to convert the address
@@ -143,32 +160,30 @@ int __init sh5pci_init(unsigned memStart, unsigned memSize)
 
         SH5PCI_WRITE(IOBR,0x0);
 
-	pr_debug("PCI:Writing 0x%08x to IOBR\n",0);
-
         /* Set up a 256K window. Totally pointless waste  of address space */
         SH5PCI_WRITE(IOBMR,0);
-	pr_debug("PCI:Writing 0x%08x to IOBMR\n",0);
 
-	/* The SH5 has a HUGE 256K I/O region, which breaks the PCI spec. Ideally,
-         * we would want to map the I/O region somewhere, but it is so big this is not
-         * that easy!
+	/* The SH5 has a HUGE 256K I/O region, which breaks the PCI spec.
+	 * Ideally, we would want to map the I/O region somewhere, but it
+	 * is so big this is not that easy!
          */
 	SH5PCI_WRITE(CSR_IBAR0,~0);
 	/* Set memory size value */
         memSize = memory_end - memory_start;
 
-        /* Now we set up the mbars so the PCI bus can see the memory of the machine */
-        if (memSize < (1024 * 1024)) {
-                printk(KERN_ERR "PCISH5: Ridiculous memory size of 0x%x?\n", memSize);
+	/* Now we set up the mbars so the PCI bus can see the memory of
+	 * the machine */
+	if (memSize < (1024 * 1024)) {
+                printk(KERN_ERR "PCISH5: Ridiculous memory size of 0x%lx?\n",
+		       memSize);
                 return -EINVAL;
         }
 
         /* Set LSR 0 */
-        lsr0 = (memSize > (512 * 1024 * 1024)) ? 0x1ff00001 : ((r2p2(memSize) - 0x100000) | 0x1);
+        lsr0 = (memSize > (512 * 1024 * 1024)) ? 0x1ff00001 :
+		((r2p2(memSize) - 0x100000) | 0x1);
         SH5PCI_WRITE(LSR0, lsr0);
 
-	pr_debug("PCI:Writing 0x%08x to LSR0\n",lsr0);
-
         /* Set MBAR 0 */
         SH5PCI_WRITE(CSR_MBAR0, memory_start);
         SH5PCI_WRITE(LAR0, memory_start);
@@ -177,334 +192,21 @@ int __init sh5pci_init(unsigned memStart, unsigned memSize)
         SH5PCI_WRITE(LAR1,0);
         SH5PCI_WRITE(LSR1,0);
 
-	pr_debug("PCI:Writing 0x%08llx to CSR_MBAR0\n",memory_start);
-	pr_debug("PCI:Writing 0x%08llx to LAR0\n",memory_start);
-
         /* Enable the PCI interrupts on the device */
         SH5PCI_WRITE(INTM,  ~0);
         SH5PCI_WRITE(AINTM, ~0);
         SH5PCI_WRITE(PINTM, ~0);
 
-	pr_debug("Switching on all error interrupts\n");
-
-        return(0);
-}
-
-static int sh5pci_read(struct pci_bus *bus, unsigned int devfn, int where,
-			int size, u32 *val)
-{
-	SH5PCI_WRITE(PAR, CONFIG_CMD(bus, devfn, where));
-
-	switch (size) {
-		case 1:
-			*val = (u8)SH5PCI_READ_BYTE(PDR + (where & 3));
-			break;
-		case 2:
-			*val = (u16)SH5PCI_READ_SHORT(PDR + (where & 2));
-			break;
-		case 4:
-			*val = SH5PCI_READ(PDR);
-			break;
-	}
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static int sh5pci_write(struct pci_bus *bus, unsigned int devfn, int where,
-			 int size, u32 val)
-{
-	SH5PCI_WRITE(PAR, CONFIG_CMD(bus, devfn, where));
-
-	switch (size) {
-		case 1:
-			SH5PCI_WRITE_BYTE(PDR + (where & 3), (u8)val);
-			break;
-		case 2:
-			SH5PCI_WRITE_SHORT(PDR + (where & 2), (u16)val);
-			break;
-		case 4:
-			SH5PCI_WRITE(PDR, val);
-			break;
-	}
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static struct pci_ops pci_config_ops = {
-	.read =		sh5pci_read,
-	.write =	sh5pci_write,
-};
-
-/* Everything hangs off this */
-static struct pci_bus *pci_root_bus;
-
-
-static u8 __init no_swizzle(struct pci_dev *dev, u8 * pin)
-{
-	pr_debug("swizzle for dev %d on bus %d slot %d pin is %d\n",
-	         dev->devfn,dev->bus->number, PCI_SLOT(dev->devfn),*pin);
-	return PCI_SLOT(dev->devfn);
-}
-
-static inline u8 bridge_swizzle(u8 pin, u8 slot)
-{
-	return (((pin-1) + slot) % 4) + 1;
-}
-
-u8 __init common_swizzle(struct pci_dev *dev, u8 *pinp)
-{
-	if (dev->bus->number != 0) {
-		u8 pin = *pinp;
-		do {
-			pin = bridge_swizzle(pin, PCI_SLOT(dev->devfn));
-			/* Move up the chain of bridges. */
-			dev = dev->bus->self;
-		} while (dev->bus->self);
-		*pinp = pin;
-
-		/* The slot is the slot of the last bridge. */
-	}
-
-	return PCI_SLOT(dev->devfn);
-}
-
-/* This needs to be shunted out of here into the board specific bit */
-
-static int __init map_cayman_irq(struct pci_dev *dev, u8 slot, u8 pin)
-{
-	int result = -1;
-
-	/* The complication here is that the PCI IRQ lines from the Cayman's 2
-	   5V slots get into the CPU via a different path from the IRQ lines
-	   from the 3 3.3V slots.  Thus, we have to detect whether the card's
-	   interrupts go via the 5V or 3.3V path, i.e. the 'bridge swizzling'
-	   at the point where we cross from 5V to 3.3V is not the normal case.
-
-	   The added complication is that we don't know that the 5V slots are
-	   always bus 2, because a card containing a PCI-PCI bridge may be
-	   plugged into a 3.3V slot, and this changes the bus numbering.
-
-	   Also, the Cayman has an intermediate PCI bus that goes a custom
-	   expansion board header (and to the secondary bridge).  This bus has
-	   never been used in practice.
-
-	   The 1ary onboard PCI-PCI bridge is device 3 on bus 0
-	   The 2ary onboard PCI-PCI bridge is device 0 on the 2ary bus of the 1ary bridge.
-	   */
-
-	struct slot_pin {
-		int slot;
-		int pin;
-	} path[4];
-	int i=0;
-
-	while (dev->bus->number > 0) {
-
-		slot = path[i].slot = PCI_SLOT(dev->devfn);
-		pin = path[i].pin = bridge_swizzle(pin, slot);
-		dev = dev->bus->self;
-		i++;
-		if (i > 3) panic("PCI path to root bus too long!\n");
-	}
-
-	slot = PCI_SLOT(dev->devfn);
-	/* This is the slot on bus 0 through which the device is eventually
-	   reachable. */
-
-	/* Now work back up. */
-	if ((slot < 3) || (i == 0)) {
-		/* Bus 0 (incl. PCI-PCI bridge itself) : perform the final
-		   swizzle now. */
-		result = IRQ_INTA + bridge_swizzle(pin, slot) - 1;
-	} else {
-		i--;
-		slot = path[i].slot;
-		pin  = path[i].pin;
-		if (slot > 0) {
-			panic("PCI expansion bus device found - not handled!\n");
-		} else {
-			if (i > 0) {
-				/* 5V slots */
-				i--;
-				slot = path[i].slot;
-				pin  = path[i].pin;
-				/* 'pin' was swizzled earlier wrt slot, don't do it again. */
-				result = IRQ_P2INTA + (pin - 1);
-			} else {
-				/* IRQ for 2ary PCI-PCI bridge : unused */
-				result = -1;
-			}
-		}
-	}
-
-	return result;
-}
-
-static irqreturn_t pcish5_err_irq(int irq, void *dev_id)
-{
-	struct pt_regs *regs = get_irq_regs();
-	unsigned pci_int, pci_air, pci_cir, pci_aint;
-
-	pci_int = SH5PCI_READ(INT);
-	pci_cir = SH5PCI_READ(CIR);
-	pci_air = SH5PCI_READ(AIR);
-
-	if (pci_int) {
-		printk("PCI INTERRUPT (at %08llx)!\n", regs->pc);
-		printk("PCI INT -> 0x%x\n", pci_int & 0xffff);
-		printk("PCI AIR -> 0x%x\n", pci_air);
-		printk("PCI CIR -> 0x%x\n", pci_cir);
-		SH5PCI_WRITE(INT, ~0);
-	}
-
-	pci_aint = SH5PCI_READ(AINT);
-	if (pci_aint) {
-		printk("PCI ARB INTERRUPT!\n");
-		printk("PCI AINT -> 0x%x\n", pci_aint);
-		printk("PCI AIR -> 0x%x\n", pci_air);
-		printk("PCI CIR -> 0x%x\n", pci_cir);
-		SH5PCI_WRITE(AINT, ~0);
-	}
-
-	return IRQ_HANDLED;
-}
-
-static irqreturn_t pcish5_serr_irq(int irq, void *dev_id)
-{
-	printk("SERR IRQ\n");
-
-	return IRQ_NONE;
-}
-
-static void __init
-pcibios_size_bridge(struct pci_bus *bus, struct resource *ior,
-		    struct resource *memr)
-{
-	struct resource io_res, mem_res;
-	struct pci_dev *dev;
-	struct pci_dev *bridge = bus->self;
-	struct list_head *ln;
-
-	if (!bridge)
-		return;	/* host bridge, nothing to do */
-
-	/* set reasonable default locations for pcibios_align_resource */
-	io_res.start = PCIBIOS_MIN_IO;
-	mem_res.start = PCIBIOS_MIN_MEM;
-
-	io_res.end = io_res.start;
-	mem_res.end = mem_res.start;
-
-	/* Collect information about how our direct children are layed out. */
-	for (ln=bus->devices.next; ln != &bus->devices; ln=ln->next) {
-		int i;
-		dev = pci_dev_b(ln);
-
-		/* Skip bridges for now */
-		if (dev->class >> 8 == PCI_CLASS_BRIDGE_PCI)
-			continue;
-
-		for (i = 0; i < PCI_NUM_RESOURCES; i++) {
-			struct resource res;
-			unsigned long size;
-
-			memcpy(&res, &dev->resource[i], sizeof(res));
-			size = res.end - res.start + 1;
-
-			if (res.flags & IORESOURCE_IO) {
-				res.start = io_res.end;
-				pcibios_align_resource(dev, &res, size, 0);
-				io_res.end = res.start + size;
-			} else if (res.flags & IORESOURCE_MEM) {
-				res.start = mem_res.end;
-				pcibios_align_resource(dev, &res, size, 0);
-				mem_res.end = res.start + size;
-			}
-		}
-	}
-
-	/* And for all of the subordinate busses. */
-	for (ln=bus->children.next; ln != &bus->children; ln=ln->next)
-		pcibios_size_bridge(pci_bus_b(ln), &io_res, &mem_res);
-
-	/* turn the ending locations into sizes (subtract start) */
-	io_res.end -= io_res.start;
-	mem_res.end -= mem_res.start;
-
-	/* Align the sizes up by bridge rules */
-	io_res.end = ALIGN(io_res.end, 4*1024) - 1;
-	mem_res.end = ALIGN(mem_res.end, 1*1024*1024) - 1;
-
-	/* Adjust the bridge's allocation requirements */
-	bridge->resource[0].end = bridge->resource[0].start + io_res.end;
-	bridge->resource[1].end = bridge->resource[1].start + mem_res.end;
-
-	bridge->resource[PCI_BRIDGE_RESOURCES].end =
-	    bridge->resource[PCI_BRIDGE_RESOURCES].start + io_res.end;
-	bridge->resource[PCI_BRIDGE_RESOURCES+1].end =
-	    bridge->resource[PCI_BRIDGE_RESOURCES+1].start + mem_res.end;
-
-	/* adjust parent's resource requirements */
-	if (ior) {
-		ior->end = ALIGN(ior->end, 4*1024);
-		ior->end += io_res.end;
-	}
-
-	if (memr) {
-		memr->end = ALIGN(memr->end, 1*1024*1024);
-		memr->end += mem_res.end;
-	}
-}
-
-static void __init pcibios_size_bridges(void)
-{
-	struct resource io_res, mem_res;
-
-	memset(&io_res, 0, sizeof(io_res));
-	memset(&mem_res, 0, sizeof(mem_res));
-
-	pcibios_size_bridge(pci_root_bus, &io_res, &mem_res);
-}
-
-static int __init pcibios_init(void)
-{
-        if (request_irq(IRQ_ERR, pcish5_err_irq,
-                        IRQF_DISABLED, "PCI Error",NULL) < 0) {
-                printk(KERN_ERR "PCISH5: Cannot hook PCI_PERR interrupt\n");
-                return -EINVAL;
-        }
-
-        if (request_irq(IRQ_SERR, pcish5_serr_irq,
-                        IRQF_DISABLED, "PCI SERR interrupt", NULL) < 0) {
-                printk(KERN_ERR "PCISH5: Cannot hook PCI_SERR interrupt\n");
-                return -EINVAL;
-        }
-
-	/* The pci subsystem needs to know where memory is and how much
-	 * of it there is. I've simply made these globals. A better mechanism
-	 * is probably needed.
-	 */
-	sh5pci_init(__pa(memory_start),
-		     __pa(memory_end) - __pa(memory_start));
-
-	pci_root_bus = pci_scan_bus(0, &pci_config_ops, NULL);
-	pcibios_size_bridges();
-	pci_assign_unassigned_resources();
-	pci_fixup_irqs(no_swizzle, map_cayman_irq);
-
 	return 0;
 }
 
-subsys_initcall(pcibios_init);
-
 void __devinit pcibios_fixup_bus(struct pci_bus *bus)
 {
 	struct pci_dev *dev = bus->self;
 	int i;
 
-#if 1
-	if(dev) {
-		for(i=0; i<3; i++) {
+	if (dev) {
+		for (i= 0; i < 3; i++) {
 			bus->resource[i] =
 				&dev->resource[PCI_BRIDGE_RESOURCES+i];
 			bus->resource[i]->name = bus->name;
@@ -514,23 +216,13 @@ void __devinit pcibios_fixup_bus(struct pci_bus *bus)
 
 		/* For now, propagate host limits to the bus;
 		 * we'll adjust them later. */
-
-#if 1
 		bus->resource[0]->end = 64*1024 - 1 ;
 		bus->resource[1]->end = PCIBIOS_MIN_MEM+(256*1024*1024)-1;
 		bus->resource[0]->start = PCIBIOS_MIN_IO;
 		bus->resource[1]->start = PCIBIOS_MIN_MEM;
-#else
-		bus->resource[0]->end = 0;
-		bus->resource[1]->end = 0;
-		bus->resource[0]->start =0;
-		bus->resource[1]->start = 0;
-#endif
+
 		/* Turn off downstream PF memory address range by default */
 		bus->resource[2]->start = 1024*1024;
 		bus->resource[2]->end = bus->resource[2]->start - 1;
 	}
-#endif
-
 }
-