[POWERPC] Add briq support to CHRP

The support for Briq machines has been floating around as patches for
ages. This cleans it up and adds it once for all.

Some of this is based on initial code provided by Karsten Jeppesen
<karsten@jeppesens.com> and mostly rewritten from scratch by me.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 38 insertions, 4 deletions

diff --git a/arch/powerpc/platforms/chrp/pci.c b/arch/powerpc/platforms/chrp/pci.c
index 6802cdc3168a..6d7ac649b45e 100644
--- a/arch/powerpc/platforms/chrp/pci.c
+++ b/arch/powerpc/platforms/chrp/pci.c
@@ -257,7 +257,7 @@ chrp_find_bridges(void)
 		else
 			printk(KERN_INFO "PCI buses %d..%d",
 			       bus_range[0], bus_range[1]);
-		printk(" controlled by %s", dev->type);
+		printk(" controlled by %s", dev->full_name);
 		if (!is_longtrail)
 			printk(" at %llx", (unsigned long long)r.start);
 		printk("\n");
@@ -289,6 +289,19 @@ chrp_find_bridges(void)
 			setup_indirect_pci(hose, 0xfec00cf8, 0xfee00cfc);
 		} else if (is_pegasos == 2) {
 			setup_peg2(hose, dev);
+		} else if (!strncmp(model, "IBM,CPC710", 10)) {
+			setup_indirect_pci(hose,
+					   r.start + 0x000f8000,
+					   r.start + 0x000f8010);
+			if (index == 0) {
+				dma = get_property(dev, "system-dma-base",&len);
+				if (dma && len >= sizeof(*dma)) {
+					dma = (unsigned int *)
+						(((unsigned long)dma) +
+						len - sizeof(*dma));
+						pci_dram_offset = *dma;
+				}
+			}
 		} else {
 			printk("No methods for %s (model %s), using RTAS\n",
 			       dev->full_name, model);
@@ -306,8 +319,29 @@ chrp_find_bridges(void)
 			printk("pci_dram_offset = %lx\n", pci_dram_offset);
 		}
 	}
+}
+
+/* SL82C105 IDE Control/Status Register */
+#define SL82C105_IDECSR                0x40
+
+/* Fixup for Winbond ATA quirk, required for briq */
+void chrp_pci_fixup_winbond_ata(struct pci_dev *sl82c105)
+{
+	u8 progif;
 
-	/* Do not fixup interrupts from OF tree on pegasos */
-	if (is_pegasos)
-		ppc_md.pcibios_fixup = NULL;
+	/* If non-briq machines need that fixup too, please speak up */
+	if (!machine_is(chrp) || _chrp_type != _CHRP_briq)
+		return;
+
+	if ((sl82c105->class & 5) != 5) {
+		printk("W83C553: Switching SL82C105 IDE to PCI native mode\n");
+		/* Enable SL82C105 PCI native IDE mode */
+		pci_read_config_byte(sl82c105, PCI_CLASS_PROG, &progif);
+		pci_write_config_byte(sl82c105, PCI_CLASS_PROG, progif | 0x05);
+		sl82c105->class |= 0x05;
+		/* Disable SL82C105 second port */
+		pci_write_config_word(sl82c105, SL82C105_IDECSR, 0x0003);
+	}
 }
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
+		chrp_pci_fixup_winbond_ata);