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Message-Id: <52189e8ee3f8b578e8477f4f05a2c880629209c2.1600132677.git.fthain@telegraphics.com.au>
Date: Tue, 15 Sep 2020 11:17:57 +1000
From: Finn Thain <fthain@...egraphics.com.au>
To: "David S. Miller" <davem@...emloft.net>,
"Geert Uytterhoeven" <geert@...ux-m68k.org>
Cc: "Bartlomiej Zolnierkiewicz" <b.zolnierkie@...sung.com>,
"Joshua Thompson" <funaho@...ai.org>,
linux-m68k@...ts.linux-m68k.org, linux-kernel@...r.kernel.org,
linux-ide@...r.kernel.org
Subject: [PATCH v3] 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.
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Joshua Thompson <funaho@...ai.org>
References: commit 5ed0794cde593 ("m68k/atari: Convert Falcon IDE drivers to platform drivers")
References: commit 7ad19a99ad431 ("ide: officially deprecated the legacy IDE driver")
Tested-by: Stan Johnson <userm57@...oo.com>
Signed-off-by: Finn Thain <fthain@...egraphics.com.au>
---
This patch was tested successfully on a Powerbook 190 (MAC_IDE_BABOON)
using both pata_platform and ide_platform drivers.
The next step will be to try using these generic drivers with the other
IDE controller variants (MAC_IDE_QUADRA or MAC_IDE_PB) so that the macide
driver can be entirely replaced with libata drivers.
Changed since v2:
- Enabled CONFIG_BLK_DEV_PLATFORM in multi_defconfig.
- Replaced dev_get_drvdata() with platform_get_drvdata().
Changed since v1:
- Adopted DEFINE_RES_MEM and DEFINE_RES_IRQ macros.
- Dropped IORESOURCE_IRQ_SHAREABLE flag as it is ignored by pata_platform.c
and IRQF_SHARED makes no difference in this case.
- Removed redundant release_mem_region() call.
- Enabled CONFIG_BLK_DEV_PLATFORM in mac_defconfig. We might also enable
CONFIG_PATA_PLATFORM but IMO migration to libata should be a separate
patch (as this patch has some unrelated benefits).
---
arch/m68k/configs/mac_defconfig | 1 +
arch/m68k/configs/multi_defconfig | 1 +
arch/m68k/mac/config.c | 41 +++++++++++++++++++
drivers/ide/macide.c | 66 ++++++++++++++++++++-----------
4 files changed, 86 insertions(+), 23 deletions(-)
diff --git a/arch/m68k/configs/mac_defconfig b/arch/m68k/configs/mac_defconfig
index 6087798662601..f770970fe4e99 100644
--- 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 0abb53c38c20d..f93c3021f20d4 100644
--- 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 5c9f3a2d65388..43fc29180cb58 100644
--- 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;
@@ -1048,6 +1069,26 @@ int __init mac_platform_init(void)
break;
}
+ /*
+ * 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/macide.c b/drivers/ide/macide.c
index 3c6bb8599303b..8a201a467886b 100644
--- 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 */
@@ -109,42 +110,61 @@ 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");
--
2.26.2
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