* [PATCH v6 1/2] ata: pata_cswarp: Add Amiga cslab ata support
2026-08-26 16:09 [PATCH v6 0/2] m68k: pata_cswarp: Add Amiga cslab ata support Paolo Pisati
@ 2026-08-26 16:09 ` Paolo Pisati
2026-08-26 16:09 ` [PATCH v6 2/2] m68k: defconfig: enable PATA_CSWARP Paolo Pisati
1 sibling, 0 replies; 3+ messages in thread
From: Paolo Pisati @ 2026-08-26 16:09 UTC (permalink / raw)
To: Geert Uytterhoeven, Damien Le Moal, Niklas Cassel
Cc: linux-ide, linux-m68k, linux-kernel
Driver for the on-board IDE interface on CS-Lab Warp Expansion Card
(NOTE that idemode=native has to be set in Warp Configuration)
Assisted-by: Claude_Code:claude-opus-5
Signed-off-by: Paolo Pisati <p.pisati@gmail.com>
---
drivers/ata/Kconfig | 10 +++
drivers/ata/Makefile | 1 +
drivers/ata/pata_cswarp.c | 183 ++++++++++++++++++++++++++++++++++++++
3 files changed, 194 insertions(+)
create mode 100644 drivers/ata/pata_cswarp.c
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 28ca856ecc75..86af89a9bfce 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -1040,6 +1040,16 @@ config PATA_GAYLE
If unsure, say N.
+config PATA_CSWARP
+ tristate "Amiga CS Warp PATA support"
+ depends on M68K && AMIGA && ZORRO
+ help
+ This option enables support for the on-board IDE interface on
+ CS-Lab Warp Expansion Card (NOTE that idemode=native has to be
+ set in Warp Configuration)
+
+ If unsure, say N.
+
config PATA_BUDDHA
tristate "Buddha/Catweasel/X-Surf PATA support"
depends on ZORRO
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index b96025abd45e..647e3d4b6f75 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -100,6 +100,7 @@ obj-$(CONFIG_PATA_WINBOND) += pata_sl82c105.o
obj-$(CONFIG_PATA_CMD640_PCI) += pata_cmd640.o
obj-$(CONFIG_PATA_FALCON) += pata_falcon.o
obj-$(CONFIG_PATA_GAYLE) += pata_gayle.o
+obj-$(CONFIG_PATA_CSWARP) += pata_cswarp.o
obj-$(CONFIG_PATA_BUDDHA) += pata_buddha.o
obj-$(CONFIG_PATA_ISAPNP) += pata_isapnp.o
obj-$(CONFIG_PATA_IXP4XX_CF) += pata_ixp4xx_cf.o
diff --git a/drivers/ata/pata_cswarp.c b/drivers/ata/pata_cswarp.c
new file mode 100644
index 000000000000..58fe6d0012dc
--- /dev/null
+++ b/drivers/ata/pata_cswarp.c
@@ -0,0 +1,183 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Amiga CS Warp PATA controller driver
+ *
+ * Copyright (c) 2024 CS-Lab s.c.
+ * http://www.cs-lab.eu
+ *
+ * Based on pata_gayle.c, pata_buddha.c and warpATA.device:
+ *
+ * Created 2 Jun 2024 by Andrzej Rogozynski
+ */
+
+#include <linux/ata.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/device-id/zorro.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/libata.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/zorro.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_host.h>
+
+#include <asm/amigahw.h>
+#include <asm/amigaints.h>
+#include <asm/amigayle.h>
+#include <asm/setup.h>
+
+#define DRV_NAME "pata_cswarp"
+
+#define WARP_OFFSET_ATA 0x6000
+
+static const struct scsi_host_template pata_cswarp_sht = {
+ ATA_PIO_SHT(DRV_NAME),
+};
+
+static unsigned int pata_cswarp_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;
+ u16 *buf16 = (u16 *)buf;
+
+ /* Transfer multiple of 2 bytes */
+ if (rw == READ)
+ raw_insw(data_addr, buf16, words);
+ else
+ raw_outsw(data_addr, buf16, words);
+
+ /* Transfer trailing byte, if any. */
+ if (unlikely(buflen & 0x01)) {
+ if (rw == READ)
+ buf[buflen - 1] = raw_inw(data_addr) >> 8;
+ else
+ raw_outw(buf[buflen - 1] << 8, data_addr);
+ 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_cswarp_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 struct ata_port_operations pata_cswarp_ops = {
+ .inherits = &ata_sff_port_ops,
+ .sff_data_xfer = pata_cswarp_data_xfer,
+ .cable_detect = ata_cable_unknown,
+ .set_mode = pata_cswarp_set_mode,
+};
+
+static int pata_cswarp_probe(struct zorro_dev *z,
+ const struct zorro_device_id *ent)
+{
+ static const char board_name[] = "csWarp";
+ struct ata_host *host;
+ struct ata_port *ap;
+ struct resource *res;
+ void __iomem *base;
+ unsigned long board = z->resource.start;
+
+ dev_info(&z->dev, "%s IDE controller (board: 0x%lx)\n", board_name,
+ board);
+
+ res = devm_request_mem_region(&z->dev, board + WARP_OFFSET_ATA, 0x1800,
+ DRV_NAME);
+ if (!res)
+ return -ENXIO;
+
+ host = ata_host_alloc(&z->dev, 1);
+ if (!host)
+ return -ENXIO;
+
+ ap = host->ports[0];
+ base = devm_ioremap(&z->dev, board + WARP_OFFSET_ATA, 0x1800);
+ if (!base)
+ return -ENOMEM;
+
+ ap->ops = &pata_cswarp_ops;
+
+ ap->pio_mask = ATA_PIO4;
+ ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY |
+ ATA_FLAG_PIO_POLLING;
+
+ ap->ioaddr.data_addr = base;
+ ap->ioaddr.error_addr = base + 1 * 4;
+ ap->ioaddr.feature_addr = base + 1 * 4;
+ ap->ioaddr.nsect_addr = base + 2 * 4;
+ ap->ioaddr.lbal_addr = base + 3 * 4;
+ ap->ioaddr.lbam_addr = base + 4 * 4;
+ ap->ioaddr.lbah_addr = base + 5 * 4;
+ ap->ioaddr.device_addr = base + 6 * 4;
+ ap->ioaddr.status_addr = base + 7 * 4;
+ ap->ioaddr.command_addr = base + 7 * 4;
+
+ ap->ioaddr.altstatus_addr = base + (0x1000 | (6UL << 2));
+ ap->ioaddr.ctl_addr = base + (0x1000 | (6UL << 2));
+
+ ata_port_desc(ap, "mmio %pR", res);
+
+ return ata_host_activate(host, 0, NULL,
+ IRQF_SHARED, &pata_cswarp_sht);
+}
+
+static void pata_cswarp_remove(struct zorro_dev *z)
+{
+ struct ata_host *host = dev_get_drvdata(&z->dev);
+
+ ata_host_detach(host);
+}
+
+static const struct zorro_device_id pata_cswarp_zorro_tbl[] = {
+ { .id = ZORRO_PROD_CSLAB_WARP_1260 },
+ { }
+};
+MODULE_DEVICE_TABLE(zorro, pata_cswarp_zorro_tbl);
+
+static struct zorro_driver pata_cswarp_driver = {
+ .name = "pata_cswarp",
+ .id_table = pata_cswarp_zorro_tbl,
+ .probe = pata_cswarp_probe,
+ .remove = pata_cswarp_remove,
+};
+
+static int __init pata_cswarp_init(void)
+{
+ return zorro_register_driver(&pata_cswarp_driver);
+}
+
+static void __exit pata_cswarp_unregister(void)
+{
+ zorro_unregister_driver(&pata_cswarp_driver);
+}
+
+module_init(pata_cswarp_init);
+module_exit(pata_cswarp_unregister);
+
+MODULE_AUTHOR("Andrzej Rogozynski");
+MODULE_DESCRIPTION("low-level driver for CSWarp PATA");
+MODULE_LICENSE("GPL");
--
2.43.0
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