ide: merge ide_arm and ide_generic host drivers

There is no need for a separate ide_arm host driver nowadays
so merge it into ide_generic one.

While at it:
- return -EBUSY from ide_generic_init() if I/O resources are busy
- scale down ide_generic_check_pci_legacy_iobases() for CONFIG_PCI=n

Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Alexander Schulz <alex@shark-linux.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

4 files changed, 15 insertions, 66 deletions

diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index 640c99207242..896424445f65 100644
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -222,7 +222,8 @@ comment "IDE chipset support/bugfixes"
 
 config IDE_GENERIC
         tristate "generic/default IDE chipset support"
-        depends on ALPHA || X86 || IA64 || M32R || MIPS
+        depends on ALPHA || X86 || IA64 || M32R || MIPS || ARCH_RPC || ARCH_SHARK
+        default ARM && (ARCH_RPC || ARCH_SHARK)
         help
           This is the generic IDE driver.  This driver attaches to the
           fixed legacy ports (e.g. on PCs 0x1f0/0x170, 0x1e8/0x168 and
@@ -731,11 +732,6 @@ config BLK_DEV_IDE_AT91
         depends on ARM && ARCH_AT91 && !ARCH_AT91RM9200 && !ARCH_AT91X40
         select IDE_TIMINGS
 
-config IDE_ARM
-        tristate "ARM IDE support"
-        depends on ARM && (ARCH_RPC || ARCH_SHARK)
-        default y
-
 config BLK_DEV_IDE_ICSIDE
         tristate "ICS IDE interface support"
         depends on ARM && ARCH_ACORN
diff --git a/drivers/ide/Makefile b/drivers/ide/Makefile
index 9b4bbe1cdc1a..81df925f0e8b 100644
--- a/drivers/ide/Makefile
+++ b/drivers/ide/Makefile
@@ -21,8 +21,6 @@ ide-core-$(CONFIG_IDE_LEGACY)		+= ide-legacy.o
 
 obj-$(CONFIG_IDE)                       += ide-core.o
 
-obj-$(CONFIG_IDE_ARM)                   += ide_arm.o
-
 obj-$(CONFIG_BLK_DEV_ALI14XX)           += ali14xx.o
 obj-$(CONFIG_BLK_DEV_UMC8672)           += umc8672.o
 obj-$(CONFIG_BLK_DEV_DTC2278)           += dtc2278.o
diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
index 3a93e4c41bf7..7812ca0be13b 100644
--- a/drivers/ide/ide-generic.c
+++ b/drivers/ide/ide-generic.c
@@ -13,7 +13,10 @@
 #include <linux/ide.h>
 #include <linux/pci_ids.h>
 
-/* FIXME: convert m32r to use ide_platform host driver */
+/* FIXME: convert arm and m32r to use ide_platform host driver */
+#ifdef CONFIG_ARM
+#include <asm/irq.h>
+#endif
 #ifdef CONFIG_M32R
 #include <asm/m32r.h>
 #endif
@@ -28,8 +31,11 @@ static const struct ide_port_info ide_generic_port_info = {
         .host_flags             = IDE_HFLAG_NO_DMA,
 };
 
-#if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) \
-        || defined(CONFIG_PLAT_OPSPUT)
+#ifdef CONFIG_ARM
+static const u16 legacy_bases[] = { 0x1f0 };
+static const int legacy_irqs[]  = { IRQ_HARDDISK };
+#elif defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_MAPPI2) || \
+      defined(CONFIG_PLAT_OPSPUT)
 static const u16 legacy_bases[] = { 0x1f0 };
 static const int legacy_irqs[]  = { PLD_IRQ_CFIREQ };
 #elif defined(CONFIG_PLAT_MAPPI3)
@@ -45,11 +51,11 @@ static const int legacy_irqs[]  = { 14, 15, 11, 10, 8, 12 };
 
 static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary)
 {
+#ifdef CONFIG_PCI
         struct pci_dev *p = NULL;
         u16 val;
 
         for_each_pci_dev(p) {
-
                 if (pci_resource_start(p, 0) == 0x1f0)
                         *primary = 1;
                 if (pci_resource_start(p, 2) == 0x170)
@@ -64,7 +70,6 @@ static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary)
                 /* Intel MPIIX - PIO ATA on non PCI side of bridge */
                 if (p->vendor == PCI_VENDOR_ID_INTEL &&
                     p->device == PCI_DEVICE_ID_INTEL_82371MX) {
-
                         pci_read_config_word(p, 0x6C, &val);
                         if (val & 0x8000) {
                                 /* ATA port enabled */
@@ -75,6 +80,7 @@ static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary)
                         }
                 }
         }
+#endif
 }
 
 static int __init ide_generic_init(void)
@@ -106,6 +112,7 @@ static int __init ide_generic_init(void)
                                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX "
                                                 "not free.\n",
                                                 DRV_NAME, io_addr, io_addr + 7);
+                                rc = -EBUSY;
                                 continue;
                         }
 
@@ -114,6 +121,7 @@ static int __init ide_generic_init(void)
                                                 "not free.\n",
                                                 DRV_NAME, io_addr + 0x206);
                                 release_region(io_addr, 8);
+                                rc = -EBUSY;
                                 continue;
                         }
 
diff --git a/drivers/ide/ide_arm.c b/drivers/ide/ide_arm.c
deleted file mode 100644
index cf6385446ece..000000000000
--- a/drivers/ide/ide_arm.c
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * ARM default IDE host driver
- *
- * Copyright (C) 2004 Bartlomiej Zolnierkiewicz
- * Based on code by: Russell King, Ian Molton and Alexander Schulz.
- *
- * May be copied or modified under the terms of the GNU General Public License.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/ide.h>
-
-#include <asm/irq.h>
-
-#define DRV_NAME "ide_arm"
-
-#define IDE_ARM_IO      0x1f0
-#define IDE_ARM_IRQ     IRQ_HARDDISK
-
-static const struct ide_port_info ide_arm_port_info = {
-        .host_flags             = IDE_HFLAG_NO_DMA,
-};
-
-static int __init ide_arm_init(void)
-{
-        unsigned long base = IDE_ARM_IO, ctl = IDE_ARM_IO + 0x206;
-        hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
-
-        if (!request_region(base, 8, DRV_NAME)) {
-                printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
-                                DRV_NAME, base, base + 7);
-                return -EBUSY;
-        }
-
-        if (!request_region(ctl, 1, DRV_NAME)) {
-                printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
-                                DRV_NAME, ctl);
-                release_region(base, 8);
-                return -EBUSY;
-        }
-
-        memset(&hw, 0, sizeof(hw));
-        ide_std_init_ports(&hw, base, ctl);
-        hw.irq = IDE_ARM_IRQ;
-        hw.chipset = ide_generic;
-
-        return ide_host_add(&ide_arm_port_info, hws, NULL);
-}
-
-module_init(ide_arm_init);
-
-MODULE_LICENSE("GPL");