[POWERPC] Generic check_legacy_ioport

check_legacy_ioport makes only sense on PREP, CHRP and pSeries.
They may have an isa node with PS/2, parport, floppy and serial ports.

Remove the check_legacy_ioport call from ppc_md, it's not needed
anymore.  Hardware capabilities come from the device-tree.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

9 files changed, 37 insertions, 81 deletions

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 3c8847b647fa..370803722e47 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -478,11 +478,39 @@ void probe_machine(void)
         printk(KERN_INFO "Using %s machine description\n", ppc_md.name);
 }
 
+/* Match a class of boards, not a specific device configuration. */
 int check_legacy_ioport(unsigned long base_port)
 {
-        if (ppc_md.check_legacy_ioport == NULL)
-                return 0;
-        return ppc_md.check_legacy_ioport(base_port);
+        struct device_node *parent, *np = NULL;
+        int ret = -ENODEV;
+
+        switch(base_port) {
+        case I8042_DATA_REG:
+                np = of_find_node_by_type(NULL, "8042");
+                break;
+        case FDC_BASE: /* FDC1 */
+                np = of_find_node_by_type(NULL, "fdc");
+                break;
+#ifdef CONFIG_PPC_PREP
+        case _PIDXR:
+        case _PNPWRP:
+        case PNPBIOS_BASE:
+                /* implement me */
+#endif
+        default:
+                /* ipmi is supposed to fail here */
+                break;
+        }
+        if (!np)
+                return ret;
+        parent = of_get_parent(np);
+        if (parent) {
+                if (strcmp(parent->type, "isa") == 0)
+                        ret = 0;
+                of_node_put(parent);
+        }
+        of_node_put(np);
+        return ret;
 }
 EXPORT_SYMBOL(check_legacy_ioport);
 
diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c
index 5c5fa34e59ee..54b96183cb64 100644
--- a/arch/powerpc/platforms/cell/setup.c
+++ b/arch/powerpc/platforms/cell/setup.c
@@ -190,15 +190,6 @@ static int __init cell_probe(void)
         return 1;
 }
 
-/*
- * Cell has no legacy IO; anything calling this function has to
- * fail or bad things will happen
- */
-static int cell_check_legacy_ioport(unsigned int baseport)
-{
-        return -ENODEV;
-}
-
 define_machine(cell) {
         .name                   = "Cell",
         .probe                  = cell_probe,
@@ -211,7 +202,6 @@ define_machine(cell) {
         .get_rtc_time           = rtas_get_rtc_time,
         .set_rtc_time           = rtas_set_rtc_time,
         .calibrate_decr         = generic_calibrate_decr,
-        .check_legacy_ioport    = cell_check_legacy_ioport,
         .progress               = cell_progress,
         .init_IRQ               = cell_init_irq,
         .pci_setup_phb          = rtas_setup_phb,
diff --git a/arch/powerpc/platforms/celleb/setup.c b/arch/powerpc/platforms/celleb/setup.c
index ab1db9dd1aa1..596ab2a788d4 100644
--- a/arch/powerpc/platforms/celleb/setup.c
+++ b/arch/powerpc/platforms/celleb/setup.c
@@ -128,15 +128,6 @@ static int __init celleb_probe(void)
         return 1;
 }
 
-/*
- * Cell has no legacy IO; anything calling this function has to
- * fail or bad things will happen
- */
-static int celleb_check_legacy_ioport(unsigned int baseport)
-{
-        return -ENODEV;
-}
-
 #ifdef CONFIG_KEXEC
 static void celleb_kexec_cpu_down(int crash, int secondary)
 {
@@ -173,7 +164,6 @@ define_machine(celleb) {
         .get_rtc_time           = beat_get_rtc_time,
         .set_rtc_time           = beat_set_rtc_time,
         .calibrate_decr         = generic_calibrate_decr,
-        .check_legacy_ioport    = celleb_check_legacy_ioport,
         .progress               = celleb_progress,
         .power_save             = beat_power_save,
         .nvram_size             = beat_nvram_get_size,
diff --git a/arch/powerpc/platforms/iseries/setup.c b/arch/powerpc/platforms/iseries/setup.c
index cce7e309340c..7f5dcee814d4 100644
--- a/arch/powerpc/platforms/iseries/setup.c
+++ b/arch/powerpc/platforms/iseries/setup.c
@@ -628,15 +628,6 @@ static void iseries_iounmap(volatile void __iomem *token)
 {
 }
 
-/*
- * iSeries has no legacy IO, anything calling this function has to
- * fail or bad things will happen
- */
-static int iseries_check_legacy_ioport(unsigned int baseport)
-{
-        return -ENODEV;
-}
-
 static int __init iseries_probe(void)
 {
         unsigned long root = of_get_flat_dt_root();
@@ -667,7 +658,6 @@ define_machine(iseries) {
         .calibrate_decr = generic_calibrate_decr,
         .progress       = iSeries_progress,
         .probe          = iseries_probe,
-        .check_legacy_ioport    = iseries_check_legacy_ioport,
         .ioremap        = iseries_ioremap,
         .iounmap        = iseries_iounmap,
         /* XXX Implement enable_pmcs for iSeries */
diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
index a7bf88e94c64..f88f0ec4c8cb 100644
--- a/arch/powerpc/platforms/pasemi/setup.c
+++ b/arch/powerpc/platforms/pasemi/setup.c
@@ -102,12 +102,6 @@ void __init pas_setup_arch(void)
         pasemi_idle_init();
 }
 
-/* No legacy IO on our parts */
-static int pas_check_legacy_ioport(unsigned int baseport)
-{
-        return -ENODEV;
-}
-
 static __init void pas_init_IRQ(void)
 {
         struct device_node *np;
@@ -252,7 +246,6 @@ define_machine(pas) {
         .restart                = pas_restart,
         .get_boot_time          = pas_get_boot_time,
         .calibrate_decr         = generic_calibrate_decr,
-        .check_legacy_ioport    = pas_check_legacy_ioport,
         .progress               = pas_progress,
         .machine_check_exception = pas_machine_check_handler,
         .pci_irq_fixup          = pas_pci_irq_fixup,
diff --git a/arch/powerpc/platforms/powermac/setup.c b/arch/powerpc/platforms/powermac/setup.c
index 0444e07e8d7a..b820cabac697 100644
--- a/arch/powerpc/platforms/powermac/setup.c
+++ b/arch/powerpc/platforms/powermac/setup.c
@@ -635,15 +635,6 @@ static void __init pmac_init_early(void)
 #endif
 }
 
-/*
- * pmac has no legacy IO, anything calling this function has to
- * fail or bad things will happen
- */
-static int pmac_check_legacy_ioport(unsigned int baseport)
-{
-        return -ENODEV;
-}
-
 static int __init pmac_declare_of_platform_devices(void)
 {
         struct device_node *np;
@@ -755,7 +746,6 @@ define_machine(powermac) {
         .get_rtc_time           = pmac_get_rtc_time,
         .calibrate_decr         = pmac_calibrate_decr,
         .feature_call           = pmac_do_feature_call,
-        .check_legacy_ioport    = pmac_check_legacy_ioport,
         .progress               = udbg_progress,
 #ifdef CONFIG_PPC64
         .pci_probe_mode         = pmac_pci_probe_mode,
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index e2fcd2307e67..33eec2822c66 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -335,32 +335,6 @@ static void __init pSeries_init_early(void)
         DBG(" <- pSeries_init_early()\n");
 }
 
-
-static int pSeries_check_legacy_ioport(unsigned int baseport)
-{
-        struct device_node *np;
-
-#define I8042_DATA_REG  0x60
-#define FDC_BASE        0x3f0
-
-
-        switch(baseport) {
-        case I8042_DATA_REG:
-                np = of_find_node_by_type(NULL, "8042");
-                if (np == NULL)
-                        return -ENODEV;
-                of_node_put(np);
-                break;
-        case FDC_BASE:
-                np = of_find_node_by_type(NULL, "fdc");
-                if (np == NULL)
-                        return -ENODEV;
-                of_node_put(np);
-                break;
-        }
-        return 0;
-}
-
 /*
  * Called very early, MMU is off, device-tree isn't unflattened
  */
@@ -537,7 +511,6 @@ define_machine(pseries) {
         .set_rtc_time           = rtas_set_rtc_time,
         .calibrate_decr         = generic_calibrate_decr,
         .progress               = rtas_progress,
-        .check_legacy_ioport    = pSeries_check_legacy_ioport,
         .system_reset_exception = pSeries_system_reset_exception,
         .machine_check_exception = pSeries_machine_check_exception,
 };
diff --git a/include/asm-powerpc/io.h b/include/asm-powerpc/io.h
index 301c9bb308b1..350c9bdb31dc 100644
--- a/include/asm-powerpc/io.h
+++ b/include/asm-powerpc/io.h
@@ -11,7 +11,12 @@
 
 /* Check of existence of legacy devices */
 extern int check_legacy_ioport(unsigned long base_port);
-#define PNPBIOS_BASE    0xf000  /* only relevant for PReP */
+#define I8042_DATA_REG  0x60
+#define FDC_BASE        0x3f0
+/* only relevant for PReP */
+#define _PIDXR          0x279
+#define _PNPWRP         0xa79
+#define PNPBIOS_BASE    0xf000
 
 #include <linux/compiler.h>
 #include <asm/page.h>
diff --git a/include/asm-powerpc/machdep.h b/include/asm-powerpc/machdep.h
index 1b04e5723548..b204926ce913 100644
--- a/include/asm-powerpc/machdep.h
+++ b/include/asm-powerpc/machdep.h
@@ -153,9 +153,6 @@ struct machdep_calls {
          */
         long            (*feature_call)(unsigned int feature, ...);
 
-        /* Check availability of legacy devices like i8042 */
-        int             (*check_legacy_ioport)(unsigned int baseport);
-
         /* Get legacy PCI/IDE interrupt mapping */ 
         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);