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Wed, 26 Aug 2026 09:09:14 -0700 (PDT) Received: from gmail.com ([2a01:e11:1403:8620:78ce:12f6:160d:28db]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c251b7a9936sm413925966b.49.2026.08.26.09.09.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Aug 2026 09:09:13 -0700 (PDT) From: Paolo Pisati To: Geert Uytterhoeven , Damien Le Moal , Niklas Cassel Cc: linux-ide@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-kernel@vger.kernel.org Subject: [PATCH v6 1/2] ata: pata_cswarp: Add Amiga cslab ata support Date: Wed, 26 Aug 2026 18:09:10 +0200 Message-ID: <20260826160911.460165-2-p.pisati@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260826160911.460165-1-p.pisati@gmail.com> References: <20260826160911.460165-1-p.pisati@gmail.com> Precedence: bulk X-Mailing-List: linux-ide@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 Reviewed-by: Damien Le Moal --- 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#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");