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, 34 insertions, 236 deletions

diff --git a/arch/sh/drivers/pci/pci-sh7780.c b/arch/sh/drivers/pci/pci-sh7780.c
index e09721330ac2..bd3064a82087 100644
--- a/arch/sh/drivers/pci/pci-sh7780.c
+++ b/arch/sh/drivers/pci/pci-sh7780.c
@@ -20,197 +20,36 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/pci.h>
-#include <linux/sched.h>
-#include <linux/ioport.h>
 #include <linux/errno.h>
-#include <linux/irq.h>
 #include <linux/delay.h>
-
-#include <asm/machvec.h>
-#include <asm/io.h>
-#include "pci-sh7780.h"
-
-static unsigned int pci_probe = PCI_PROBE_CONF1;
-extern int pci_fixup_pcic(void);
-
-/*
- * 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 sh7780_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(SH7780_PCIPAR));
-        data = inl(PCI_REG(SH7780_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;
-}
+#include "pci-sh4.h"
 
 /*
- * Since SH7780 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.
+ * Initialization. Try all known PCI access methods. Note that we support
+ * using both PCI BIOS and direct access: in such cases, we use I/O ports
+ * to access config space.
+ *
+ * Note that the platform specific initialization (BSC registers, and memory
+ * space mapping) will be called via the platform defined function
+ * pcibios_init_platform().
  */
-static int sh7780_pci_write(struct pci_bus *bus, unsigned int devfn,
-                            int where, int size, u32 val)
+static int __init sh7780_pci_init(void)
 {
-        unsigned long flags;
-        int shift;
-        u32 data;
-
-        local_irq_save(flags);
-        outl(CONFIG_CMD(bus, devfn, where), PCI_REG(SH7780_PCIPAR));
-        data = inl(PCI_REG(SH7780_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(SH7780_PCIPDR));
-
-        return PCIBIOS_SUCCESSFUL;
-}
-
-#undef CONFIG_CMD
-
-struct pci_ops sh7780_pci_ops = {
-        .read           = sh7780_pci_read,
-        .write          = sh7780_pci_write,
-};
+        unsigned int id;
+        int ret;
 
-static int __init pci_check_direct(void)
-{
-        unsigned int tmp, id;
+        pr_debug("PCI: Starting intialization.\n");
 
         outl(0x00000001, SH7780_PCI_VCR2); /* Enable PCIC */
 
         /* check for SH7780/SH7780R hardware */
-        id = inl(PCI_REG(SH7780_PCIVID));
+        id = pci_read_reg(SH7780_PCIVID);
         if ((id != ((SH7780_DEVICE_ID << 16) | SH7780_VENDOR_ID)) &&
             (id != ((SH7781_DEVICE_ID << 16) | SH7780_VENDOR_ID))) {
                 printk(KERN_ERR "PCI: This is not an SH7780 (%x)\n", id);
                 return -ENODEV;
         }
 
-        /*
-         * Check if configuration works.
-         */
-        if (pci_probe & PCI_PROBE_CONF1) {
-                tmp = inl(PCI_REG(SH7780_PCIPAR));
-                outl(0x80000000, PCI_REG(SH7780_PCIPAR));
-                if (inl(PCI_REG(SH7780_PCIPAR)) == 0x80000000) {
-                        outl(tmp, PCI_REG(SH7780_PCIPAR));
-                        printk(KERN_INFO "PCI: Using configuration type 1\n");
-                        request_region(PCI_REG(SH7780_PCIPAR), 8, "PCI conf1");
-                        return 0;
-                }
-                outl(tmp, PCI_REG(SH7780_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
- * using both PCI BIOS and direct access: in such cases, we use I/O ports
- * 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
- * exists 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.
- */
-
-static int __init sh7780_pci_init(void)
-{
-        int ret;
-
-        pr_debug("PCI: Starting intialization.\n");
-
         /* Setup the INTC */
         ctrl_outl(0x00200000, INTC_ICR0);       /* INTC SH-4 Mode */
         ctrl_outl(0x00078000, INTC_INT2MSKCR);  /* enable PCIINTA - PCIINTD */
@@ -219,15 +58,14 @@ static int __init sh7780_pci_init(void)
         ctrl_outl(0x80000000, INTC_INTMSKCLR1); /* enable IRL0-3 Interrupt */
         ctrl_outl(0xfffe0000, INTC_INTMSKCLR2); /* enable IRL0-3 Interrupt */
 
-        if ((ret = pci_check_direct()) != 0)
+        if ((ret = sh4_pci_check_direct()) != 0)
                 return ret;
 
         return pcibios_init_platform();
 }
-
 core_initcall(sh7780_pci_init);
 
-int __init sh7780_pcic_init(struct sh7780_pci_address_map *map)
+int __init sh7780_pcic_init(struct sh4_pci_address_map *map)
 {
         u32 word;
 
@@ -236,25 +74,25 @@ int __init sh7780_pcic_init(struct sh7780_pci_address_map *map)
          * bootloader and doing it here means the MAC addresses loaded
          * by the bootloader get lost.
          */
-        if (!(map->flags & SH7780_PCIC_NO_RESET)) {
+        if (!(map->flags & SH4_PCIC_NO_RESET)) {
                 /* toggle PCI reset pin */
-                word = SH7780_PCICR_PREFIX | SH7780_PCICR_PRST;
-                outl(word,PCI_REG(SH7780_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 = SH7780_PCICR_PREFIX;
-                outl(word,PCI_REG(SH7780_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
          */
-        outl(0x00000046, PCI_REG(SH7780_PCICMD));
+        pci_write_reg(0x00000046, SH7780_PCICMD);
 
         /* define this host as the host bridge */
-        word = SH7780_PCI_HOST_BRIDGE << 24;
-        outl(word, PCI_REG(SH7780_PCIRID));
+        word = PCI_BASE_CLASS_BRIDGE << 24;
+        pci_write_reg(word, SH7780_PCIRID);
 
         /* Set IO and Mem windows to local address
          * Make PCI and local address the same for easy 1 to 1 mapping
@@ -262,25 +100,26 @@ int __init sh7780_pcic_init(struct sh7780_pci_address_map *map)
          * Window1 = map->window1.size @ cached area base = SDRAM
          */
         word = ((map->window0.size - 1) & 0x1ff00001) | 0x01;
-        outl(0x07f00001, PCI_REG(SH7780_PCILSR0));
+        pci_write_reg(0x07f00001, SH4_PCILSR0);
         word = ((map->window1.size - 1) & 0x1ff00001) | 0x01;
-        outl(0x00000001, PCI_REG(SH7780_PCILSR1));
+        pci_write_reg(0x00000001, SH4_PCILSR1);
         /* Set the values on window 0 PCI config registers */
         word = P2SEGADDR(map->window0.base);
-        outl(0xa8000000, PCI_REG(SH7780_PCILAR0));
-        outl(0x08000000, PCI_REG(SH7780_PCIMBAR0));
+        pci_write_reg(0xa8000000, SH4_PCILAR0);
+        pci_write_reg(0x08000000, SH7780_PCIMBAR0);
         /* Set the values on window 1 PCI config registers */
         word = P2SEGADDR(map->window1.base);
-        outl(0x00000000, PCI_REG(SH7780_PCILAR1));
-        outl(0x00000000, PCI_REG(SH7780_PCIMBAR1));
+        pci_write_reg(0x00000000, SH4_PCILAR1);
+        pci_write_reg(0x00000000, SH7780_PCIMBAR1);
 
         /* Map IO space into PCI IO window
          * The IO window is 64K-PCIBIOS_MIN_IO in size
          * 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), SH7780_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),
+                 SH7780_PCI_IO_BASE + PCIBIOS_MIN_IO);
 
         /* NOTE: I'm ignoring the PCI error IRQs for now..
          * TODO: add support for the internal error interrupts and
@@ -293,49 +132,8 @@ int __init sh7780_pcic_init(struct sh7780_pci_address_map *map)
 
         /* SH7780 init done, set central function init complete */
         /* use round robin mode to stop a device starving/overruning */
-        word = SH7780_PCICR_PREFIX | SH7780_PCICR_CFIN | /* SH7780_PCICR_ARBM |*/ SH7780_PCICR_FTO;
-        outl(word, PCI_REG(SH7780_PCICR));
+        word = SH4_PCICR_PREFIX | SH4_PCICR_CFIN | SH4_PCICR_FTO;
+        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 sh7780_no_swizzle(struct pci_dev *dev, u8 *pin)
-{
-        /* no swizzling */
-        return PCI_SLOT(dev->devfn);
-}
-
-static int sh7780_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(sh7780_no_swizzle, sh7780_pci_lookup_irq);
-}
-