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linux/drivers/ata/pata_falcon.c
Uwe Kleine-König 2d910fe1e6 ata: Switch back to struct platform_driver::remove() 
After commit 0edb555a65 ("platform: Make platform_driver::remove()
return void") .remove() is (again) the right callback to implement for
platform drivers.

Convert all platform drivers below drivers/ata/ to use .remove(), with
the eventual goal to drop struct platform_driver::remove_new(). As
.remove() and .remove_new() have the same prototypes, conversion is done
by just changing the structure member name in the driver initializer.

While touching these files, make indention of the struct initializer
consistent in several files.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20241016141609.27329-2-u.kleine-koenig@baylibre.com
Signed-off-by: Niklas Cassel <cassel@kernel.org>
2024-10-17 09:55:08 +02:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Atari Falcon PATA controller driver
*
* Copyright (c) 2016 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Based on falconide.c:
*
* Created 12 Jul 1997 by Geert Uytterhoeven
*/
#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/platform_device.h>
#include <asm/setup.h>
#include <asm/atarihw.h>
#include <asm/atariints.h>
#include <asm/atari_stdma.h>
#define DRV_NAME "pata_falcon"
#define DRV_VERSION "0.1.0"
static int pata_falcon_swap_mask;
module_param_named(data_swab, pata_falcon_swap_mask, int, 0444);
MODULE_PARM_DESC(data_swab, "Data byte swap enable/disable bitmap (0x1==drive1, 0x2==drive2, 0x4==drive3, 0x8==drive4, default==0)");
static const struct scsi_host_template pata_falcon_sht = {
ATA_PIO_SHT(DRV_NAME),
};
static unsigned int pata_falcon_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;
struct scsi_cmnd *cmd = qc->scsicmd;
bool swap = 1;
if (dev->class == ATA_DEV_ATA && cmd &&
!blk_rq_is_passthrough(scsi_cmd_to_rq(cmd)))
swap = (uintptr_t)ap->private_data & BIT(dev->devno);
/* Transfer multiple of 2 bytes */
if (rw == READ) {
if (swap)
raw_insw_swapw(data_addr, (u16 *)buf, words);
else
raw_insw(data_addr, (u16 *)buf, words);
} else {
if (swap)
raw_outsw_swapw(data_addr, (u16 *)buf, words);
else
raw_outsw(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) {
if (swap)
raw_insw_swapw(data_addr, (u16 *)pad, 1);
else
raw_insw(data_addr, (u16 *)pad, 1);
*buf = pad[0];
} else {
pad[0] = *buf;
if (swap)
raw_outsw_swapw(data_addr, (u16 *)pad, 1);
else
raw_outsw(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_falcon_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_falcon_ops = {
.inherits = &ata_sff_port_ops,
.sff_data_xfer = pata_falcon_data_xfer,
.cable_detect = ata_cable_unknown,
.set_mode = pata_falcon_set_mode,
};
static int pata_falcon_init_one(struct platform_device *pdev)
{
struct resource *base_mem_res, *ctl_mem_res;
struct resource *base_res, *ctl_res, *irq_res;
struct ata_host *host;
struct ata_port *ap;
void __iomem *base, *ctl_base;
int mask_shift = 0; /* Q40 & Falcon default */
int irq = 0, io_offset = 1, reg_shift = 2; /* Falcon defaults */
dev_info(&pdev->dev, "Atari Falcon and Q40/Q60 PATA controller\n");
base_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (base_res && !devm_request_region(&pdev->dev, base_res->start,
resource_size(base_res), DRV_NAME)) {
dev_err(&pdev->dev, "resources busy\n");
return -EBUSY;
}
ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
if (ctl_res && !devm_request_region(&pdev->dev, ctl_res->start,
resource_size(ctl_res), DRV_NAME)) {
dev_err(&pdev->dev, "resources busy\n");
return -EBUSY;
}
base_mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!base_mem_res)
return -ENODEV;
if (!devm_request_mem_region(&pdev->dev, base_mem_res->start,
resource_size(base_mem_res), DRV_NAME)) {
dev_err(&pdev->dev, "resources busy\n");
return -EBUSY;
}
ctl_mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!ctl_mem_res)
return -ENODEV;
/* allocate host */
host = ata_host_alloc(&pdev->dev, 1);
if (!host)
return -ENOMEM;
ap = host->ports[0];
ap->ops = &pata_falcon_ops;
ap->pio_mask = ATA_PIO4;
ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
/* N.B. this assumes data_addr will be used for word-sized I/O only */
ap->ioaddr.data_addr = (void __iomem *)base_mem_res->start;
if (base_res) { /* only Q40 has IO resources */
io_offset = 0x10000;
reg_shift = 0;
base = (void __iomem *)base_res->start;
ctl_base = (void __iomem *)ctl_res->start;
} else {
base = (void __iomem *)base_mem_res->start;
ctl_base = (void __iomem *)ctl_mem_res->start;
}
ap->ioaddr.error_addr = base + io_offset + (1 << reg_shift);
ap->ioaddr.feature_addr = base + io_offset + (1 << reg_shift);
ap->ioaddr.nsect_addr = base + io_offset + (2 << reg_shift);
ap->ioaddr.lbal_addr = base + io_offset + (3 << reg_shift);
ap->ioaddr.lbam_addr = base + io_offset + (4 << reg_shift);
ap->ioaddr.lbah_addr = base + io_offset + (5 << reg_shift);
ap->ioaddr.device_addr = base + io_offset + (6 << reg_shift);
ap->ioaddr.status_addr = base + io_offset + (7 << reg_shift);
ap->ioaddr.command_addr = base + io_offset + (7 << reg_shift);
ap->ioaddr.altstatus_addr = ctl_base + io_offset;
ap->ioaddr.ctl_addr = ctl_base + io_offset;
ata_port_desc(ap, "cmd %px ctl %px data %px",
base, ctl_base, ap->ioaddr.data_addr);
if (pdev->id > 0)
mask_shift = 2;
ap->private_data = (void *)(uintptr_t)(pata_falcon_swap_mask >> mask_shift);
irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (irq_res && irq_res->start > 0) {
irq = irq_res->start;
} else {
ap->flags |= ATA_FLAG_PIO_POLLING;
ata_port_desc(ap, "no IRQ, using PIO polling");
}
/* activate */
return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
IRQF_SHARED, &pata_falcon_sht);
}
static void pata_falcon_remove_one(struct platform_device *pdev)
{
struct ata_host *host = platform_get_drvdata(pdev);
ata_host_detach(host);
}
static struct platform_driver pata_falcon_driver = {
.probe = pata_falcon_init_one,
.remove = pata_falcon_remove_one,
.driver = {
.name = "atari-falcon-ide",
},
};
module_platform_driver(pata_falcon_driver);
MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
MODULE_DESCRIPTION("low-level driver for Atari Falcon PATA");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:atari-falcon-ide");
MODULE_VERSION(DRV_VERSION);
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