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// 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");
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