sh: Consolidated SH7751/SH7780 PCI support.

This cleans up quite a lot of the PCI mess that we
currently have, and attempts to consolidate the
duplication in the SH7780 and SH7751 PCI controllers.

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

1 files changed, 61 insertions, 261 deletions

diff --git a/arch/sh/drivers/pci/pci-sh7751.c b/arch/sh/drivers/pci/pci-sh7751.c
index 65093ec..dbe8378 100644
--- a/arch/sh/drivers/pci/pci-sh7751.c
+++ b/arch/sh/drivers/pci/pci-sh7751.c
@@ -15,180 +15,14 @@
 
 #undef DEBUG
 
-#include <linux/types.h>
-#include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/pci.h>
-#include <linux/sched.h>
-#include <linux/ioport.h>
+#include <linux/types.h>
 #include <linux/errno.h>
-#include <linux/irq.h>
 #include <linux/delay.h>
-
-#include <asm/machvec.h>
+#include "pci-sh4.h"
+#include <asm/addrspace.h>
 #include <asm/io.h>
-#include "pci-sh7751.h"
-
-static unsigned int pci_probe = PCI_PROBE_CONF1;
-extern int pci_fixup_pcic(void);
-
-void pcibios_fixup_irqs(void) __attribute__ ((weak));
-
-/*
- * Direct access to PCI hardware...
- */
-
-#define CONFIG_CMD(bus, devfn, where) (0x80000000 | (bus->number << 16) | (devfn << 8) | (where & ~3))
-
-/*
- * Functions for accessing PCI configuration space with type 1 accesses
- */
-static int sh7751_pci_read(struct pci_bus *bus, unsigned int devfn,
-			   int where, int size, u32 *val)
-{
-	unsigned long flags;
-	u32 data;
-
-	/* 
-	 * PCIPDR may only be accessed as 32 bit words, 
-	 * so we must do byte alignment by hand 
-	 */
-	local_irq_save(flags);
-	outl(CONFIG_CMD(bus,devfn,where), PCI_REG(SH7751_PCIPAR));
-	data = inl(PCI_REG(SH7751_PCIPDR));
-	local_irq_restore(flags);
-
-	switch (size) {
-	case 1:
-		*val = (data >> ((where & 3) << 3)) & 0xff;
-		break;
-	case 2:
-		*val = (data >> ((where & 2) << 3)) & 0xffff;
-		break;
-	case 4:
-		*val = data;
-		break;
-	default:
-		return PCIBIOS_FUNC_NOT_SUPPORTED;
-	}
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-/* 
- * Since SH7751 only does 32bit access we'll have to do a read,
- * mask,write operation.
- * We'll allow an odd byte offset, though it should be illegal.
- */ 
-static int sh7751_pci_write(struct pci_bus *bus, unsigned int devfn,
-			    int where, int size, u32 val)
-{
-	unsigned long flags;
-	int shift;
-	u32 data;
-
-	local_irq_save(flags);
-	outl(CONFIG_CMD(bus,devfn,where), PCI_REG(SH7751_PCIPAR));
-	data = inl(PCI_REG(SH7751_PCIPDR));
-	local_irq_restore(flags);
-
-	switch (size) {
-	case 1:
-		shift = (where & 3) << 3;
-		data &= ~(0xff << shift);
-		data |= ((val & 0xff) << shift);
-		break;
-	case 2:
-		shift = (where & 2) << 3;
-		data &= ~(0xffff << shift);
-		data |= ((val & 0xffff) << shift);
-		break;
-	case 4:
-		data = val;
-		break;
-	default:
-		return PCIBIOS_FUNC_NOT_SUPPORTED;
-	}
-
-	outl(data, PCI_REG(SH7751_PCIPDR));
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-#undef CONFIG_CMD
-
-struct pci_ops sh7751_pci_ops = {
-	.read 		= sh7751_pci_read,
-	.write		= sh7751_pci_write,
-};
-
-static int __init pci_check_direct(void)
-{
-	unsigned int tmp, id;
-
-	/* check for SH7751/SH7751R hardware */
-	id = inl(SH7751_PCIREG_BASE+SH7751_PCICONF0);
-	if (id != ((SH7751_DEVICE_ID << 16) | SH7751_VENDOR_ID) &&
-	    id != ((SH7751R_DEVICE_ID << 16) | SH7751_VENDOR_ID)) {
-		pr_debug("PCI: This is not an SH7751(R) (%x)\n", id);
-		return -ENODEV;
-	}
-
-	/*
-	 * Check if configuration works.
-	 */
-	if (pci_probe & PCI_PROBE_CONF1) {
-		tmp = inl (PCI_REG(SH7751_PCIPAR));
-		outl (0x80000000, PCI_REG(SH7751_PCIPAR));
-		if (inl (PCI_REG(SH7751_PCIPAR)) == 0x80000000) {
-			outl (tmp, PCI_REG(SH7751_PCIPAR));
-			printk(KERN_INFO "PCI: Using configuration type 1\n");
-			request_region(PCI_REG(SH7751_PCIPAR), 8, "PCI conf1");
-			return 0;
-		}
-		outl (tmp, PCI_REG(SH7751_PCIPAR));
-	}
-
-	pr_debug("PCI: pci_check_direct failed\n");
-	return -EINVAL;
-}
-
-/***************************************************************************************/
-
-/*
- *  Handle bus scanning and fixups ....
- */
-
-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;
-	pr_debug("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);
-
-/*
- *  Called after each bus is probed, but before its children
- *  are examined.
- */
-
-void __init pcibios_fixup_bus(struct pci_bus *b)
-{
-	pci_read_bridge_bases(b);
-}
 
 /*
  * Initialization. Try all known PCI access methods. Note that we support
@@ -196,25 +30,29 @@ void __init pcibios_fixup_bus(struct pci_bus *b)
  * to access config space.
  * 
  * Note that the platform specific initialization (BSC registers, and memory
- * space mapping) will be called via the machine vectors (sh_mv.mv_pci_init()) if it
- * exitst and via the platform defined function pcibios_init_platform().  
- * See pci_bigsur.c for implementation;
- * 
- * The BIOS version of the pci functions is not yet implemented but it is left
- * in for completeness.  Currently an error will be genereated at compile time. 
+ * space mapping) will be called via the platform defined function
+ * pcibios_init_platform().
  */
-
 static int __init sh7751_pci_init(void)
 {
+	unsigned int id;
 	int ret;
 
 	pr_debug("PCI: Starting intialization.\n");
-	if ((ret = pci_check_direct()) != 0)
+
+	/* check for SH7751/SH7751R hardware */
+	id = pci_read_reg(SH7751_PCICONF0);
+	if (id != ((SH7751_DEVICE_ID << 16) | SH7751_VENDOR_ID) &&
+	    id != ((SH7751R_DEVICE_ID << 16) | SH7751_VENDOR_ID)) {
+		pr_debug("PCI: This is not an SH7751(R) (%x)\n", id);
+		return -ENODEV;
+	}
+
+	if ((ret = sh4_pci_check_direct()) != 0)
 		return ret;
 
 	return pcibios_init_platform();
 }
-
 subsys_initcall(sh7751_pci_init);
 
 static int __init __area_sdram_check(unsigned int area)
@@ -228,7 +66,7 @@ static int __init __area_sdram_check(unsigned int area)
 		       area, word);
 		return 0;
 	}
-	outl(word, PCI_REG(SH7751_PCIBCR1));
+	pci_write_reg(word, SH4_PCIBCR1);
 
 	word = (u16)inw(SH7751_BCR2);
 	/* check BCR2 for 32bit SDRAM interface*/
@@ -237,12 +75,12 @@ static int __init __area_sdram_check(unsigned int area)
 		       area, word);
 		return 0;
 	}
-	outl(word, PCI_REG(SH7751_PCIBCR2));
+	pci_write_reg(word, SH4_PCIBCR2);
 
 	return 1;
 }
 
-int __init sh7751_pcic_init(struct sh7751_pci_address_map *map)
+int __init sh7751_pcic_init(struct sh4_pci_address_map *map)
 {
 	u32 reg;
 	u32 word;
@@ -251,39 +89,39 @@ int __init sh7751_pcic_init(struct sh7751_pci_address_map *map)
 	reg = inl(SH7751_BCR1);
 	reg |= 0x80000;
 	outl(reg, SH7751_BCR1);
-	
+
 	/* Turn the clocks back on (not done in reset)*/
-	outl(0, PCI_REG(SH7751_PCICLKR));
+	pci_write_reg(0, SH4_PCICLKR);
 	/* Clear Powerdown IRQ's (not done in reset) */
-	word = SH7751_PCIPINT_D3 | SH7751_PCIPINT_D0;
-	outl(word, PCI_REG(SH7751_PCIPINT));
+	word = SH4_PCIPINT_D3 | SH4_PCIPINT_D0;
+	pci_write_reg(word, SH4_PCIPINT);
 
 	/*
 	 * This code is unused for some boards as it is done in the
 	 * bootloader and doing it here means the MAC addresses loaded
 	 * by the bootloader get lost.
 	 */
-	if (!(map->flags & SH7751_PCIC_NO_RESET)) {
+	if (!(map->flags & SH4_PCIC_NO_RESET)) {
 		/* toggle PCI reset pin */
-		word = SH7751_PCICR_PREFIX | SH7751_PCICR_PRST;
-		outl(word,PCI_REG(SH7751_PCICR));
+		word = SH4_PCICR_PREFIX | SH4_PCICR_PRST;
+		pci_write_reg(word, SH4_PCICR);
 		/* Wait for a long time... not 1 sec. but long enough */
 		mdelay(100);
-		word = SH7751_PCICR_PREFIX;
-		outl(word,PCI_REG(SH7751_PCICR));
+		word = SH4_PCICR_PREFIX;
+		pci_write_reg(word, SH4_PCICR);
 	}
-	
+
 	/* set the command/status bits to:
 	 * Wait Cycle Control + Parity Enable + Bus Master +
 	 * Mem space enable
 	 */
 	word = SH7751_PCICONF1_WCC | SH7751_PCICONF1_PER | 
 	       SH7751_PCICONF1_BUM | SH7751_PCICONF1_MES;
-	outl(word, PCI_REG(SH7751_PCICONF1));
+	pci_write_reg(word, SH7751_PCICONF1);
 
 	/* define this host as the host bridge */
-	word = SH7751_PCI_HOST_BRIDGE << 24;
-	outl(word, PCI_REG(SH7751_PCICONF2));
+	word = PCI_BASE_CLASS_BRIDGE << 24;
+	pci_write_reg(word, SH7751_PCICONF2);
 
 	/* Set IO and Mem windows to local address 
 	 * Make PCI and local address the same for easy 1 to 1 mapping 
@@ -291,46 +129,49 @@ int __init sh7751_pcic_init(struct sh7751_pci_address_map *map)
 	 * Window1 = map->window1.size @ cached area base = SDRAM 
 	 */
 	word = map->window0.size - 1;
-	outl(word, PCI_REG(SH7751_PCILSR0));
+	pci_write_reg(word, SH4_PCILSR0);
 	word = map->window1.size - 1;
-	outl(word, PCI_REG(SH7751_PCILSR1));
+	pci_write_reg(word, SH4_PCILSR1);
 	/* Set the values on window 0 PCI config registers */
 	word = P2SEGADDR(map->window0.base);
-	outl(word, PCI_REG(SH7751_PCILAR0));
-	outl(word, PCI_REG(SH7751_PCICONF5));
+	pci_write_reg(word, SH4_PCILAR0);
+	pci_write_reg(word, SH7751_PCICONF5);
 	/* Set the values on window 1 PCI config registers */
 	word =  PHYSADDR(map->window1.base);
-	outl(word, PCI_REG(SH7751_PCILAR1));
-	outl(word, PCI_REG(SH7751_PCICONF6));
+	pci_write_reg(word, SH4_PCILAR1);
+	pci_write_reg(word, SH7751_PCICONF6);
 
-	/* Set the local 16MB PCI memory space window to 
+	/* Set the local 16MB PCI memory space window to
 	 * the lowest PCI mapped address
 	 */
-	word = PCIBIOS_MIN_MEM & SH7751_PCIMBR_MASK;
-	PCIDBG(2,"PCI: Setting upper bits of Memory window to 0x%x\n", word);
-	outl(word , PCI_REG(SH7751_PCIMBR));
+	word = PCIBIOS_MIN_MEM & SH4_PCIMBR_MASK;
+	pr_debug("PCI: Setting upper bits of Memory window to 0x%x\n", word);
+	pci_write_reg(word , SH4_PCIMBR);
 
 	/* Map IO space into PCI IO window
 	 * The IO window is 64K-PCIBIOS_MIN_IO in size
-	 * IO addresses will be translated to the 
+	 * IO addresses will be translated to the
 	 * PCI IO window base address
 	 */
-	PCIDBG(3,"PCI: Mapping IO address 0x%x - 0x%x to base 0x%x\n", PCIBIOS_MIN_IO,
-	    (64*1024), SH7751_PCI_IO_BASE+PCIBIOS_MIN_IO);
+	pr_debug("PCI: Mapping IO address 0x%x - 0x%x to base 0x%x\n",
+		 PCIBIOS_MIN_IO, (64 << 10),
+		 SH4_PCI_IO_BASE + PCIBIOS_MIN_IO);
 
-	/* 
+	/*
 	 * XXX: For now, leave this board-specific. In the event we have other
 	 * boards that need to do similar work, this can be wrapped.
 	 */
 #ifdef CONFIG_SH_BIGSUR
-	bigsur_port_map(PCIBIOS_MIN_IO, (64*1024), SH7751_PCI_IO_BASE+PCIBIOS_MIN_IO,0);
+	bigsur_port_map(PCIBIOS_MIN_IO, (64 << 10),
+			SH4_PCI_IO_BASE + PCIBIOS_MIN_IO, 0);
 #endif
 
-	/* Make sure the MSB's of IO window are set to access PCI space correctly */
-	word = PCIBIOS_MIN_IO & SH7751_PCIIOBR_MASK;
-	PCIDBG(2,"PCI: Setting upper bits of IO window to 0x%x\n", word);
-	outl(word, PCI_REG(SH7751_PCIIOBR));
-	
+	/* Make sure the MSB's of IO window are set to access PCI space
+	 * correctly */
+	word = PCIBIOS_MIN_IO & SH4_PCIIOBR_MASK;
+	pr_debug("PCI: Setting upper bits of IO window to 0x%x\n", word);
+	pci_write_reg(word, SH4_PCIIOBR);
+
 	/* Set PCI WCRx, BCRx's, copy from BSC locations */
 
 	/* check BCR for SDRAM in specified area */
@@ -349,13 +190,13 @@ int __init sh7751_pcic_init(struct sh7751_pci_address_map *map)
 
 	/* configure the wait control registers */
 	word = inl(SH7751_WCR1);
-	outl(word, PCI_REG(SH7751_PCIWCR1));
+	pci_write_reg(word, SH4_PCIWCR1);
 	word = inl(SH7751_WCR2);
-	outl(word, PCI_REG(SH7751_PCIWCR2));
+	pci_write_reg(word, SH4_PCIWCR2);
 	word = inl(SH7751_WCR3);
-	outl(word, PCI_REG(SH7751_PCIWCR3));
+	pci_write_reg(word, SH4_PCIWCR3);
 	word = inl(SH7751_MCR);
-	outl(word, PCI_REG(SH7751_PCIMCR));
+	pci_write_reg(word, SH4_PCIMCR);
 
 	/* NOTE: I'm ignoring the PCI error IRQs for now..
 	 * TODO: add support for the internal error interrupts and
@@ -368,49 +209,8 @@ int __init sh7751_pcic_init(struct sh7751_pci_address_map *map)
 
 	/* SH7751 init done, set central function init complete */
 	/* use round robin mode to stop a device starving/overruning */
-	word = SH7751_PCICR_PREFIX | SH7751_PCICR_CFIN | SH7751_PCICR_ARBM;
-	outl(word,PCI_REG(SH7751_PCICR)); 
+	word = SH4_PCICR_PREFIX | SH4_PCICR_CFIN | SH4_PCICR_ARBM;
+	pci_write_reg(word, SH4_PCICR);
 
 	return 1;
 }
-
-char * __init pcibios_setup(char *str)
-{
-	if (!strcmp(str, "off")) {
-		pci_probe = 0;
-		return NULL;
-	}
-
-	return str;
-}
-
-/* 
- * 	IRQ functions 
- */
-static u8 __init sh7751_no_swizzle(struct pci_dev *dev, u8 *pin)
-{
-	/* no swizzling */
-	return PCI_SLOT(dev->devfn);
-}
-
-static int sh7751_pci_lookup_irq(struct pci_dev *dev, u8 slot, u8 pin)
-{
-	int irq = -1;
-
-	/* now lookup the actual IRQ on a platform specific basis (pci-'platform'.c) */
-	irq = pcibios_map_platform_irq(slot,pin);
-	if( irq < 0 ) {
-		pr_debug("PCI: Error mapping IRQ on device %s\n", pci_name(dev));
-		return irq;
-	}
-
-	pr_debug("Setting IRQ for slot %s to %d\n", pci_name(dev), irq);
-
-	return irq;
-}
-
-void __init pcibios_fixup_irqs(void)
-{
-	pci_fixup_irqs(sh7751_no_swizzle, sh7751_pci_lookup_irq);
-}
-