[PATCH] ata: add Amiga Gayle PATA controller driver

[PATCH] ata: add Amiga Gayle PATA controller driver

[Bartlomiej Zolnierkiewicz]

Add Amiga Gayle PATA controller driver. It enables libata support
for the on-board IDE interfaces on some Amiga models (A600, A1200,
A4000 and A4000T) and also for IDE interfaces on the Zorro expansion
bus (M-Tech E-Matrix 530 expansion card).

Thanks to John Paul Adrian Glaubitz and Michael Schmitz for help
with testing the driver.

Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Michael Schmitz <schmitzmic@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
 drivers/ata/Kconfig      |   12 ++
 drivers/ata/Makefile     |    1 
 drivers/ata/pata_gayle.c |  224 +++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 237 insertions(+)

Index: b/drivers/ata/Kconfig
===================================================================
--- a/drivers/ata/Kconfig	2018-01-30 17:02:59.792831900 +0100
+++ b/drivers/ata/Kconfig	2018-01-30 17:02:59.792831900 +0100
@@ -963,6 +963,18 @@ config PATA_FALCON
 
 	  If unsure, say N.
 
+config PATA_GAYLE
+	tristate "Amiga Gayle PATA support"
+	depends on M68K && AMIGA
+	help
+	  This option enables support for the on-board IDE
+	  interfaces on some Amiga models (A600, A1200,
+	  A4000 and A4000T) and also for IDE interfaces on
+	  the Zorro expansion bus (M-Tech E-Matrix 530
+	  expansion card).
+
+	  If unsure, say N.
+
 config PATA_ISAPNP
 	tristate "ISA Plug and Play PATA support"
 	depends on ISAPNP
Index: b/drivers/ata/Makefile
===================================================================
--- a/drivers/ata/Makefile	2018-01-30 17:02:59.792831900 +0100
+++ b/drivers/ata/Makefile	2018-01-30 17:02:59.792831900 +0100
@@ -98,6 +98,7 @@ obj-$(CONFIG_PATA_WINBOND)	+= pata_sl82c
 # SFF PIO only
 obj-$(CONFIG_PATA_CMD640_PCI)	+= pata_cmd640.o
 obj-$(CONFIG_PATA_FALCON)	+= pata_falcon.o
+obj-$(CONFIG_PATA_GAYLE)	+= pata_gayle.o
 obj-$(CONFIG_PATA_ISAPNP)	+= pata_isapnp.o
 obj-$(CONFIG_PATA_IXP4XX_CF)	+= pata_ixp4xx_cf.o
 obj-$(CONFIG_PATA_MPIIX)	+= pata_mpiix.o
Index: b/drivers/ata/pata_gayle.c
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ b/drivers/ata/pata_gayle.c	2018-01-30 17:05:04.780835047 +0100
@@ -0,0 +1,224 @@
+/*
+ * Amiga Gayle PATA controller driver
+ *
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Based on gayle.c:
+ *
+ *     Created 12 Jul 1997 by Geert Uytterhoeven
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_cmnd.h>
+#include <linux/ata.h>
+#include <linux/libata.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/zorro.h>
+#include <linux/platform_device.h>
+
+#include <asm/setup.h>
+#include <asm/amigahw.h>
+#include <asm/amigaints.h>
+#include <asm/amigayle.h>
+#include <asm/ide.h>
+
+#define DRV_NAME "pata_gayle"
+#define DRV_VERSION "0.1.0"
+
+#define GAYLE_CONTROL	0x101a
+
+static struct scsi_host_template pata_gayle_sht = {
+	ATA_PIO_SHT(DRV_NAME),
+};
+
+/* FIXME: is this needed? */
+static unsigned int pata_gayle_data_xfer(struct ata_queued_cmd *qc,
+					 unsigned char *buf,
+					 unsigned int buflen, int rw)
+{
+	struct ata_device *dev = qc->dev;
+	struct ata_port *ap = dev->link->ap;
+	void __iomem *data_addr = ap->ioaddr.data_addr;
+	unsigned int words = buflen >> 1;
+
+	/* Transfer multiple of 2 bytes */
+	if (rw == READ)
+		raw_insw((u16 *)data_addr, (u16 *)buf, words);
+	else
+		raw_outsw((u16 *)data_addr, (u16 *)buf, words);
+
+	/* Transfer trailing byte, if any. */
+	if (unlikely(buflen & 0x01)) {
+		unsigned char pad[2] = { };
+
+		/* Point buf to the tail of buffer */
+		buf += buflen - 1;
+
+		if (rw == READ) {
+			raw_insw((u16 *)data_addr, (u16 *)pad, 1);
+			*buf = pad[0];
+		} else {
+			pad[0] = *buf;
+			raw_outsw((u16 *)data_addr, (u16 *)pad, 1);
+		}
+		words++;
+	}
+
+	return words << 1;
+}
+
+/*
+ * Provide our own set_mode() as we don't want to change anything that has
+ * already been configured..
+ */
+static int pata_gayle_set_mode(struct ata_link *link,
+			       struct ata_device **unused)
+{
+	struct ata_device *dev;
+
+	ata_for_each_dev(dev, link, ENABLED) {
+		/* We don't really care */
+		dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
+		dev->xfer_shift = ATA_SHIFT_PIO;
+		dev->flags |= ATA_DFLAG_PIO;
+		ata_dev_info(dev, "configured for PIO\n");
+	}
+	return 0;
+}
+
+static bool pata_gayle_irq_check(struct ata_port *ap)
+{
+	u8 ch;
+
+	ch = z_readb((unsigned long)ap->private_data);
+	if (!(ch & GAYLE_IRQ_IDE))
+		return false;
+	return true;
+}
+
+static void pata_gayle_irq_clear(struct ata_port *ap)
+{
+	(void)z_readb((unsigned long)ap->ioaddr.status_addr);
+	z_writeb(0x7c, (unsigned long)ap->private_data);
+}
+
+static struct ata_port_operations pata_gayle_a1200_ops = {
+	.inherits	= &ata_sff_port_ops,
+	.sff_data_xfer	= pata_gayle_data_xfer,
+	.sff_irq_check	= pata_gayle_irq_check,
+	.sff_irq_clear	= pata_gayle_irq_clear,
+	.cable_detect	= ata_cable_unknown,
+	.set_mode	= pata_gayle_set_mode,
+};
+
+static struct ata_port_operations pata_gayle_a4000_ops = {
+	.inherits	= &ata_sff_port_ops,
+	.sff_data_xfer	= pata_gayle_data_xfer,
+	.cable_detect	= ata_cable_unknown,
+	.set_mode	= pata_gayle_set_mode,
+};
+
+static int __init pata_gayle_init_one(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct gayle_ide_platform_data *pdata;
+	struct ata_host *host;
+	struct ata_port *ap;
+	void __iomem *base;
+	int ret;
+
+	pdata = dev_get_platdata(&pdev->dev);
+
+	pr_info(DRV_NAME ": Amiga Gayle IDE controller (A%u style)\n",
+		pdata->explicit_ack ? 1200 : 4000);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+
+	if (!devm_request_mem_region(&pdev->dev, res->start,
+				     resource_size(res), DRV_NAME)) {
+		pr_err(DRV_NAME ": resources busy\n");
+		return -EBUSY;
+	}
+
+	/* allocate host */
+	host = ata_host_alloc(&pdev->dev, 1);
+	if (!host)
+		return -ENOMEM;
+
+	ap = host->ports[0];
+
+	if (pdata->explicit_ack)
+		ap->ops = &pata_gayle_a1200_ops;
+	else
+		ap->ops = &pata_gayle_a4000_ops;
+
+	ap->pio_mask = ATA_PIO4;
+	ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
+
+	base = ZTWO_VADDR(pdata->base);
+	ap->ioaddr.data_addr		= base;
+	ap->ioaddr.error_addr		= base + 2 + 1 * 4;
+	ap->ioaddr.feature_addr		= base + 2 + 1 * 4;
+	ap->ioaddr.nsect_addr		= base + 2 + 2 * 4;
+	ap->ioaddr.lbal_addr		= base + 2 + 3 * 4;
+	ap->ioaddr.lbam_addr		= base + 2 + 4 * 4;
+	ap->ioaddr.lbah_addr		= base + 2 + 5 * 4;
+	ap->ioaddr.device_addr		= base + 2 + 6 * 4;
+	ap->ioaddr.status_addr		= base + 2 + 7 * 4;
+	ap->ioaddr.command_addr		= base + 2 + 7 * 4;
+
+	ap->ioaddr.altstatus_addr	= base + GAYLE_CONTROL;
+	ap->ioaddr.ctl_addr		= base + GAYLE_CONTROL;
+
+	ap->private_data = (void *)ZTWO_VADDR(pdata->irqport);
+
+	ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", (unsigned long)base,
+		      (unsigned long)base + GAYLE_CONTROL);
+
+	/* activate */
+	ret = ata_host_activate(host, IRQ_AMIGA_PORTS, ata_sff_interrupt,
+				IRQF_SHARED, &pata_gayle_sht);
+	if (ret)
+		return ret;
+
+	platform_set_drvdata(pdev, host);
+
+	return 0;
+}
+
+static int __exit pata_gayle_remove_one(struct platform_device *pdev)
+{
+	struct ata_host *host = platform_get_drvdata(pdev);
+
+	ata_host_detach(host);
+
+	return 0;
+}
+
+static struct platform_driver pata_gayle_driver = {
+	.remove = __exit_p(pata_gayle_remove_one),
+	.driver   = {
+		.name	= "amiga-gayle-ide",
+	},
+};
+
+module_platform_driver_probe(pata_gayle_driver, pata_gayle_init_one);
+
+MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
+MODULE_DESCRIPTION("low-level driver for Amiga Gayle PATA");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:amiga-gayle-ide");
+MODULE_VERSION(DRV_VERSION);

Re: [PATCH] ata: add Amiga Gayle PATA controller driver

[Philippe Ombredanne]

On Mon, Feb 12, 2018 at 2:49 PM, Bartlomiej Zolnierkiewicz
<b.zolnierkie@samsung.com> wrote:
> Add Amiga Gayle PATA controller driver. It enables libata support
> for the on-board IDE interfaces on some Amiga models (A600, A1200,
> A4000 and A4000T) and also for IDE interfaces on the Zorro expansion
> bus (M-Tech E-Matrix 530 expansion card).
>
> Thanks to John Paul Adrian Glaubitz and Michael Schmitz for help
> with testing the driver.
>
> Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
> Cc: Michael Schmitz <schmitzmic@gmail.com>
> Cc: Geert Uytterhoeven <geert@linux-m68k.org>
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

<snip>
> + *
> + * This file is subject to the terms and conditions of the GNU General Public
> + * License.  See the file "COPYING" in the main directory of this archive
> + * for more details.
> + */

Do you mind using the new SDPX ids? (well not so new anymore). [1]

<snip>
> +
> +MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
> +MODULE_DESCRIPTION("low-level driver for Amiga Gayle PATA");
> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS("platform:amiga-gayle-ide");
> +MODULE_VERSION(DRV_VERSION);
>

.... and while doing it please make sure your MODULE_LICENSE matches
the license.
Here for instance it is not clear to me if this a GPL-2.0 or a GPL-2.0+


Thanks!
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/license-rules.rst
-- 
Cordially
Philippe Ombredanne

+1 650 799 0949 | pombredanne@nexB.com
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Re: [PATCH] ata: add Amiga Gayle PATA controller driver

[John Paul Adrian Glaubitz]

Hello!

On 02/12/2018 02:49 PM, Bartlomiej Zolnierkiewicz wrote:
> Add Amiga Gayle PATA controller driver. It enables libata support
> for the on-board IDE interfaces on some Amiga models (A600, A1200,
> A4000 and A4000T) and also for IDE interfaces on the Zorro expansion
> bus (M-Tech E-Matrix 530 expansion card).
> 
> Thanks to John Paul Adrian Glaubitz and Michael Schmitz for help
> with testing the driver.

Is there any progress on this? Is it just the SDPX headers now that
are missing?

Thanks,
Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

Re: [PATCH] ata: add Amiga Gayle PATA controller driver

[John Paul Adrian Glaubitz]

Hello!

On 02/18/2018 05:18 PM, John Paul Adrian Glaubitz wrote:
> Is there any progress on this? Is it just the SDPX headers now that
> are missing?

Would it be okay if re-send the patch with the SPDX headers added?

Or can we get the patch merged, then I'll send a patch to add the
SPDX headers?

Thanks,
Adrian

-- 
  .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
   `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913

Re: [PATCH] ata: add Amiga Gayle PATA controller driver

[Bartlomiej Zolnierkiewicz]

On Thursday, March 01, 2018 10:55:48 AM John Paul Adrian Glaubitz wrote:
> Hello!

Hi,

> On 02/18/2018 05:18 PM, John Paul Adrian Glaubitz wrote:
> > Is there any progress on this? Is it just the SDPX headers now that
> > are missing?
> 
> Would it be okay if re-send the patch with the SPDX headers added?
> 
> Or can we get the patch merged, then I'll send a patch to add the
> SPDX headers?

I'll post updated version later today, sorry for the delay (I've been
busy with other things and the patch is not v4.16 material anyway).

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

Re: [PATCH] ata: add Amiga Gayle PATA controller driver

[John Paul Adrian Glaubitz]

Hi Bartlomiej!

Any chance you had a chance working on the libata port of the Buddha
driver? The Amiga 4000 here is equipped with a Buddha and I'm happy
to help testing the driver:

root@elgar:~> lszorro
00: Phase 5 Digital Products CyberSCSI/Blizzard 1220
01: Village Tronic Ariadne Ethernet Card
02: individual Computers X-Surf 100 Z-II/ZIII Ethernet
03: individual Computers Buddha IDE Controller
04: Phase 5 Digital Products CyberVision 64
root@elgar:~>

Adrian

On 3/1/18 11:52 AM, Bartlomiej Zolnierkiewicz wrote:
> On Thursday, March 01, 2018 10:55:48 AM John Paul Adrian Glaubitz wrote:
>> Hello!
> 
> Hi,
> 
>> On 02/18/2018 05:18 PM, John Paul Adrian Glaubitz wrote:
>>> Is there any progress on this? Is it just the SDPX headers now that
>>> are missing?
>>
>> Would it be okay if re-send the patch with the SPDX headers added?
>>
>> Or can we get the patch merged, then I'll send a patch to add the
>> SPDX headers?
> 
> I'll post updated version later today, sorry for the delay (I've been
> busy with other things and the patch is not v4.16 material anyway).
> 
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
> 
> --
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> the body of a message to majordomo@vger.kernel.org
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> 

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
  `-    GPG: 62FF 8A75 84E0 2956 9546  0006 7426 3B37 F5B5 F913