5 files changed, 155 insertions, 49 deletions

diff --git a/arch/alpha/kernel/Makefile b/arch/alpha/kernel/Makefile
index 7739a62440a7..5a62fb46ef20 100644
--- a/arch/alpha/kernel/Makefile
+++ b/arch/alpha/kernel/Makefile
@@ -35,7 +35,7 @@ endif
 
 obj-y    += irq_pyxis.o irq_i8259.o irq_srm.o
 obj-y    += err_ev6.o
-obj-y    += es1888.o smc37c669.o smc37c93x.o ns87312.o gct.o
+obj-y    += es1888.o smc37c669.o smc37c93x.o pc873xx.o gct.o
 obj-y    += srmcons.o
 
 else
@@ -63,11 +63,11 @@ obj-$(CONFIG_ALPHA_WILDFIRE)	+= core_wildfire.o
 # Board support
 obj-$(CONFIG_ALPHA_ALCOR)       += sys_alcor.o irq_i8259.o irq_srm.o
 obj-$(CONFIG_ALPHA_CABRIOLET)   += sys_cabriolet.o irq_i8259.o irq_srm.o \
-                                   ns87312.o
+                                   pc873xx.o
 obj-$(CONFIG_ALPHA_EB164)       += sys_cabriolet.o irq_i8259.o irq_srm.o \
-                                   ns87312.o
+                                   pc873xx.o
 obj-$(CONFIG_ALPHA_EB66P)       += sys_cabriolet.o irq_i8259.o irq_srm.o \
-                                   ns87312.o
+                                   pc873xx.o
 obj-$(CONFIG_ALPHA_LX164)       += sys_cabriolet.o irq_i8259.o irq_srm.o \
                                    smc37c93x.o
 obj-$(CONFIG_ALPHA_PC164)       += sys_cabriolet.o irq_i8259.o irq_srm.o \
@@ -90,14 +90,14 @@ obj-$(CONFIG_ALPHA_RUFFIAN)	+= sys_ruffian.o irq_pyxis.o irq_i8259.o
 obj-$(CONFIG_ALPHA_RX164)       += sys_rx164.o irq_i8259.o
 obj-$(CONFIG_ALPHA_SABLE)       += sys_sable.o
 obj-$(CONFIG_ALPHA_LYNX)        += sys_sable.o
-obj-$(CONFIG_ALPHA_BOOK1)       += sys_sio.o irq_i8259.o irq_srm.o ns87312.o
-obj-$(CONFIG_ALPHA_AVANTI)      += sys_sio.o irq_i8259.o irq_srm.o ns87312.o
-obj-$(CONFIG_ALPHA_NONAME)      += sys_sio.o irq_i8259.o irq_srm.o ns87312.o
-obj-$(CONFIG_ALPHA_P2K)         += sys_sio.o irq_i8259.o irq_srm.o ns87312.o
-obj-$(CONFIG_ALPHA_XL)          += sys_sio.o irq_i8259.o irq_srm.o ns87312.o
+obj-$(CONFIG_ALPHA_BOOK1)       += sys_sio.o irq_i8259.o irq_srm.o pc873xx.o
+obj-$(CONFIG_ALPHA_AVANTI)      += sys_sio.o irq_i8259.o irq_srm.o pc873xx.o
+obj-$(CONFIG_ALPHA_NONAME)      += sys_sio.o irq_i8259.o irq_srm.o pc873xx.o
+obj-$(CONFIG_ALPHA_P2K)         += sys_sio.o irq_i8259.o irq_srm.o pc873xx.o
+obj-$(CONFIG_ALPHA_XL)          += sys_sio.o irq_i8259.o irq_srm.o pc873xx.o
 obj-$(CONFIG_ALPHA_SX164)       += sys_sx164.o irq_pyxis.o irq_i8259.o \
                                    irq_srm.o smc37c669.o
-obj-$(CONFIG_ALPHA_TAKARA)      += sys_takara.o irq_i8259.o ns87312.o
+obj-$(CONFIG_ALPHA_TAKARA)      += sys_takara.o irq_i8259.o pc873xx.o
 obj-$(CONFIG_ALPHA_WILDFIRE)    += sys_wildfire.o irq_i8259.o
 
 # Error support
diff --git a/arch/alpha/kernel/ns87312.c b/arch/alpha/kernel/ns87312.c
deleted file mode 100644
index 342b56d24c20..000000000000
--- a/arch/alpha/kernel/ns87312.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- *      linux/arch/alpha/kernel/ns87312.c
- */
-
-#include <linux/init.h>
-#include <asm/io.h>
-#include "proto.h"
-
-
-/*
- * The SRM console *disables* the IDE interface, this code ensures it's
- * enabled.
- *
- * This code bangs on a control register of the 87312 Super I/O chip
- * that implements parallel port/serial ports/IDE/FDI.  Depending on
- * the motherboard, the Super I/O chip can be configured through a
- * pair of registers that are located either at I/O ports 0x26e/0x26f
- * or 0x398/0x399.  Unfortunately, autodetecting which base address is
- * in use works only once (right after a reset).  The Super I/O chip
- * has the additional quirk that configuration register data must be
- * written twice (I believe this is a safety feature to prevent
- * accidental modification---fun, isn't it?).
- */
-
-void __init
-ns87312_enable_ide(long ide_base)
-{
-        int data;
-        unsigned long flags;
-
-        local_irq_save(flags);
-        outb(0, ide_base);              /* set the index register for reg #0 */
-        data = inb(ide_base+1);         /* read the current contents */
-        outb(0, ide_base);              /* set the index register for reg #0 */
-        outb(data | 0x40, ide_base+1);  /* turn on IDE */
-        outb(data | 0x40, ide_base+1);  /* turn on IDE, really! */
-        local_irq_restore(flags);
-}
diff --git a/arch/alpha/kernel/pc873xx.c b/arch/alpha/kernel/pc873xx.c
new file mode 100644
index 000000000000..27dcbff85613
--- /dev/null
+++ b/arch/alpha/kernel/pc873xx.c
@@ -0,0 +1,88 @@
+#include <linux/ioport.h>
+#include <asm/io.h>
+
+#include "pc873xx.h"
+
+static unsigned pc873xx_probelist[] = {0x398, 0x26e, 0};
+
+static char *pc873xx_names[] = {
+        "PC87303", "PC87306", "PC87312", "PC87332", "PC87334"
+};
+
+static unsigned int base, model;
+
+
+unsigned int __init pc873xx_get_base()
+{
+        return base;
+}
+
+char *__init pc873xx_get_model()
+{
+        return pc873xx_names[model];
+}
+
+static unsigned char __init pc873xx_read(unsigned int base, int reg)
+{
+        outb(reg, base);
+        return inb(base + 1);
+}
+
+static void __init pc873xx_write(unsigned int base, int reg, unsigned char data)
+{
+        unsigned long flags;
+
+        local_irq_save(flags);
+        outb(reg, base);
+        outb(data, base + 1);
+        outb(data, base + 1);           /* Must be written twice */
+        local_irq_restore(flags);
+}
+
+int __init pc873xx_probe(void)
+{
+        int val, index = 0;
+
+        while ((base = pc873xx_probelist[index++])) {
+
+                if (request_region(base, 2, "Super IO PC873xx") == NULL)
+                        continue;
+
+                val = pc873xx_read(base, REG_SID);
+                if ((val & 0xf0) == 0x10) {
+                        model = PC87332;
+                        break;
+                } else if ((val & 0xf8) == 0x70) {
+                        model = PC87306;
+                        break;
+                } else if ((val & 0xf8) == 0x50) {
+                        model = PC87334;
+                        break;
+                } else if ((val & 0xf8) == 0x40) {
+                        model = PC87303;
+                        break;
+                }
+
+                release_region(base, 2);
+        }
+
+        return (base == 0) ? -1 : 1;
+}
+
+void __init pc873xx_enable_epp19(void)
+{
+        unsigned char data;
+
+        printk(KERN_INFO "PC873xx enabling EPP v1.9\n");
+        data = pc873xx_read(base, REG_PCR);
+        pc873xx_write(base, REG_PCR, (data & 0xFC) | 0x02);
+}
+
+void __init pc873xx_enable_ide(void)
+{
+        unsigned char data;
+
+        printk(KERN_INFO "PC873xx enabling IDE interrupt\n");
+        data = pc873xx_read(base, REG_FER);
+        pc873xx_write(base, REG_FER, data | 0x40);
+}
diff --git a/arch/alpha/kernel/pc873xx.h b/arch/alpha/kernel/pc873xx.h
new file mode 100644
index 000000000000..25e16956fe3e
--- /dev/null
+++ b/arch/alpha/kernel/pc873xx.h
@@ -0,0 +1,35 @@
+
+#ifndef _PC873xx_H_
+#define _PC873xx_H_
+
+/*
+ * Control Register Values
+ */
+#define REG_FER 0x00
+#define REG_FAR 0x01
+#define REG_PTR 0x02
+#define REG_FCR 0x03
+#define REG_PCR 0x04
+#define REG_KRR 0x05
+#define REG_PMC 0x06
+#define REG_TUP 0x07
+#define REG_SID 0x08
+#define REG_ASC 0x09
+#define REG_IRC 0x0e
+
+/*
+ * Model numbers
+ */
+#define PC87303 0
+#define PC87306 1
+#define PC87312 2
+#define PC87332 3
+#define PC87334 4
+
+int pc873xx_probe(void);
+unsigned int pc873xx_get_base(void);
+char *pc873xx_get_model(void);
+void pc873xx_enable_epp19(void);
+void pc873xx_enable_ide(void);
+
+#endif
diff --git a/arch/alpha/kernel/sys_sio.c b/arch/alpha/kernel/sys_sio.c
index d4327e461c22..85b4aea01ef8 100644
--- a/arch/alpha/kernel/sys_sio.c
+++ b/arch/alpha/kernel/sys_sio.c
@@ -34,6 +34,7 @@
 #include "irq_impl.h"
 #include "pci_impl.h"
 #include "machvec_impl.h"
+#include "pc873xx.h"
 
 #if defined(ALPHA_RESTORE_SRM_SETUP)
 /* Save LCA configuration data as the console had it set up.  */
@@ -208,7 +209,27 @@ noname_init_pci(void)
         common_init_pci();
         sio_pci_route();
         sio_fixup_irq_levels(sio_collect_irq_levels());
-        ns87312_enable_ide(0x26e);
+
+        if (pc873xx_probe() == -1) {
+                printk(KERN_ERR "Probing for PC873xx Super IO chip failed.\n");
+        } else {
+                printk(KERN_INFO "Found %s Super IO chip at 0x%x\n",
+                        pc873xx_get_model(), pc873xx_get_base());
+
+                /* Enabling things in the Super IO chip doesn't actually
+                 * configure and enable things, the legacy drivers still
+                 * need to do the actual configuration and enabling.
+                 * This only unblocks them.
+                 */
+
+#if !defined(CONFIG_ALPHA_AVANTI)
+                /* Don't bother on the Avanti family.
+                 * None of them had on-board IDE.
+                 */
+                pc873xx_enable_ide();
+#endif
+                pc873xx_enable_epp19();
+        }
 }
 
 static inline void __init