ide/macide: Convert Mac IDE driver to platform driver

Add platform devices for the Mac IDE controller variants. Convert the
macide module into a platform driver to support two of those variants.
For the third, use a generic "pata_platform" driver instead.
This enables automatic loading of the appropriate module and begins
the process of replacing the driver with libata alternatives.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Tested-by: Stan Johnson <userm57@yahoo.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Joshua Thompson <funaho@jurai.org>
References: commit 5ed0794cde593 ("m68k/atari: Convert Falcon IDE drivers to platform drivers")
References: commit 7ad19a99ad431 ("ide: officially deprecated the legacy IDE driver")
Link: https://lore.kernel.org/r/edd106dad1bbea32500601c6071f37a9f02a8004.1600901284.git.fthain@telegraphics.com.au
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

diff --git a/arch/m68k/configs/mac_defconfig b/arch/m68k/configs/mac_defconfig
index 522dcf6..3cd76bf 100644 (file)
--- a/arch/m68k/configs/mac_defconfig
+++ b/arch/m68k/configs/mac_defconfig
@@ -317,6 +317,7 @@ CONFIG_DUMMY_IRQ=m
 CONFIG_IDE=y
 CONFIG_IDE_GD_ATAPI=y
 CONFIG_BLK_DEV_IDECD=y
+CONFIG_BLK_DEV_PLATFORM=y
 CONFIG_BLK_DEV_MAC_IDE=y
 CONFIG_RAID_ATTRS=m
 CONFIG_SCSI=y

diff --git a/arch/m68k/configs/multi_defconfig b/arch/m68k/configs/multi_defconfig
index 2433409..c3d6faa 100644 (file)
--- a/arch/m68k/configs/multi_defconfig
+++ b/arch/m68k/configs/multi_defconfig
@@ -346,6 +346,7 @@ CONFIG_DUMMY_IRQ=m
 CONFIG_IDE=y
 CONFIG_IDE_GD_ATAPI=y
 CONFIG_BLK_DEV_IDECD=y
+CONFIG_BLK_DEV_PLATFORM=y
 CONFIG_BLK_DEV_GAYLE=y
 CONFIG_BLK_DEV_BUDDHA=y
 CONFIG_BLK_DEV_FALCON_IDE=y

diff --git a/arch/m68k/mac/config.c b/arch/m68k/mac/config.c
index 5c9f3a2..43fc291 100644 (file)
--- a/arch/m68k/mac/config.c
+++ b/arch/m68k/mac/config.c
@@ -24,6 +24,7 @@
 #include <linux/init.h>
 #include <linux/vt_kern.h>
 #include <linux/platform_device.h>
+#include <linux/ata_platform.h>
 #include <linux/adb.h>
 #include <linux/cuda.h>
 #include <linux/pmu.h>
@@ -940,6 +941,26 @@ static const struct resource mac_scsi_ccl_rsrc[] __initconst = {
        },
 };
 
+static const struct resource mac_ide_quadra_rsrc[] __initconst = {
+       DEFINE_RES_MEM(0x50F1A000, 0x104),
+       DEFINE_RES_IRQ(IRQ_NUBUS_F),
+};
+
+static const struct resource mac_ide_pb_rsrc[] __initconst = {
+       DEFINE_RES_MEM(0x50F1A000, 0x104),
+       DEFINE_RES_IRQ(IRQ_NUBUS_C),
+};
+
+static const struct resource mac_pata_baboon_rsrc[] __initconst = {
+       DEFINE_RES_MEM(0x50F1A000, 0x38),
+       DEFINE_RES_MEM(0x50F1A038, 0x04),
+       DEFINE_RES_IRQ(IRQ_BABOON_1),
+};
+
+static const struct pata_platform_info mac_pata_baboon_data __initconst = {
+       .ioport_shift = 2,
+};
+
 int __init mac_platform_init(void)
 {
        phys_addr_t swim_base = 0;
@@ -1049,6 +1070,26 @@ int __init mac_platform_init(void)
        }
 
        /*
+        * IDE device
+        */
+
+       switch (macintosh_config->ide_type) {
+       case MAC_IDE_QUADRA:
+               platform_device_register_simple("mac_ide", -1,
+                       mac_ide_quadra_rsrc, ARRAY_SIZE(mac_ide_quadra_rsrc));
+               break;
+       case MAC_IDE_PB:
+               platform_device_register_simple("mac_ide", -1,
+                       mac_ide_pb_rsrc, ARRAY_SIZE(mac_ide_pb_rsrc));
+               break;
+       case MAC_IDE_BABOON:
+               platform_device_register_resndata(NULL, "pata_platform", -1,
+                       mac_pata_baboon_rsrc, ARRAY_SIZE(mac_pata_baboon_rsrc),
+                       &mac_pata_baboon_data, sizeof(mac_pata_baboon_data));
+               break;
+       }
+
+       /*
         * Ethernet device
         */
 

diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig
index 973ed4b..19abf11 100644 (file)
--- a/drivers/ide/Kconfig
+++ b/drivers/ide/Kconfig
@@ -744,9 +744,10 @@ config BLK_DEV_MAC_IDE
        depends on MAC
        help
          This is the IDE driver for the on-board IDE interface on some m68k
-         Macintosh models. It supports both the `Quadra style' (used in
-         Quadra/ Centris 630 and Performa 588 models) and `Powerbook style'
-         (used in the Powerbook 150 and 190 models) IDE interface.
+         Macintosh models, namely Quadra/Centris 630, Performa 588 and
+         Powerbook 150. The IDE interface on the Powerbook 190 is not
+         supported by this driver and requires BLK_DEV_PLATFORM or
+         PATA_PLATFORM.
 
          Say Y if you have such an Macintosh model and want to use IDE
          devices (hard disks, CD-ROM drives, etc.) that are connected to the

diff --git a/drivers/ide/macide.c b/drivers/ide/macide.c
index adc5fe9..8d2bf73 100644 (file)
--- a/drivers/ide/macide.c
+++ b/drivers/ide/macide.c
@@ -18,10 +18,11 @@
 #include <linux/delay.h>
 #include <linux/ide.h>
 #include <linux/module.h>
+#include <linux/platform_device.h>
 
 #include <asm/macintosh.h>
-#include <asm/macints.h>
-#include <asm/mac_baboon.h>
+
+#define DRV_NAME "mac_ide"
 
 #define IDE_BASE 0x50F1A000    /* Base address of IDE controller */
 
@@ -100,42 +101,61 @@ static const char *mac_ide_name[] =
  * Probe for a Macintosh IDE interface
  */
 
-static int __init macide_init(void)
+static int mac_ide_probe(struct platform_device *pdev)
 {
-       unsigned long base;
-       int irq;
+       struct resource *mem, *irq;
        struct ide_hw hw, *hws[] = { &hw };
        struct ide_port_info d = macide_port_info;
+       struct ide_host *host;
+       int rc;
 
        if (!MACH_IS_MAC)
                return -ENODEV;
 
-       switch (macintosh_config->ide_type) {
-       case MAC_IDE_QUADRA:
-               base = IDE_BASE;
-               irq = IRQ_NUBUS_F;
-               break;
-       case MAC_IDE_PB:
-               base = IDE_BASE;
-               irq = IRQ_NUBUS_C;
-               break;
-       case MAC_IDE_BABOON:
-               base = BABOON_BASE;
-               d.port_ops = NULL;
-               irq = IRQ_BABOON_1;
-               break;
-       default:
+       mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!mem)
+               return -ENODEV;
+
+       irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+       if (!irq)
                return -ENODEV;
+
+       if (!devm_request_mem_region(&pdev->dev, mem->start,
+                                    resource_size(mem), DRV_NAME)) {
+               dev_err(&pdev->dev, "resources busy\n");
+               return -EBUSY;
        }
 
        printk(KERN_INFO "ide: Macintosh %s IDE controller\n",
                         mac_ide_name[macintosh_config->ide_type - 1]);
 
-       macide_setup_ports(&hw, base, irq);
+       macide_setup_ports(&hw, mem->start, irq->start);
 
-       return ide_host_add(&d, hws, 1, NULL);
+       rc = ide_host_add(&d, hws, 1, &host);
+       if (rc)
+               return rc;
+
+       platform_set_drvdata(pdev, host);
+       return 0;
 }
 
-module_init(macide_init);
+static int mac_ide_remove(struct platform_device *pdev)
+{
+       struct ide_host *host = platform_get_drvdata(pdev);
+
+       ide_host_remove(host);
+       return 0;
+}
+
+static struct platform_driver mac_ide_driver = {
+       .driver = {
+               .name = DRV_NAME,
+       },
+       .probe  = mac_ide_probe,
+       .remove = mac_ide_remove,
+};
+
+module_platform_driver(mac_ide_driver);
 
+MODULE_ALIAS("platform:" DRV_NAME);
 MODULE_LICENSE("GPL");