[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>

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);
 

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,

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,

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 */

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,

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,

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,
 };

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>

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);