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path: root/arch/sh/drivers/pci/pci-sh5.c
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Diffstat (limited to 'arch/sh/drivers/pci/pci-sh5.c')
-rw-r--r--arch/sh/drivers/pci/pci-sh5.c452
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 b4d9534d2b0..a00a4df8c02 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
-
}
-
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-12 11:47:32 +0000