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![Michael Schmitz](/assets/img/avatar_default.png)
Autoloading of Falcon IDE driver modules requires converting these drivers to platform drivers. Add platform device for Falcon IDE interface in Atari platform setup code. Use this in the pata_falcon driver in place of the simple platform device set up on the fly. Convert falconide driver to use the same platform device that is used by pata_falcon also. (With the introduction of a platform device for the Atari Falcon IDE interface, the old Falcon IDE driver no longer loads (resource already claimed by the platform device)). Tested (as built-in driver) on my Atari Falcon. Signed-off-by: Michael Schmitz <schmitzmic@gmail.com> Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Link: https://lore.kernel.org/r/1573008449-8226-1-git-send-email-schmitzmic@gmail.com Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
196 lines
4.8 KiB
C
196 lines
4.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Atari Falcon PATA controller driver
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*
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* Copyright (c) 2016 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Based on falconide.c:
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*
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* Created 12 Jul 1997 by Geert Uytterhoeven
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_cmnd.h>
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#include <linux/ata.h>
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#include <linux/libata.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <asm/setup.h>
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#include <asm/atarihw.h>
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#include <asm/atariints.h>
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#include <asm/atari_stdma.h>
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#include <asm/ide.h>
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#define DRV_NAME "pata_falcon"
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#define DRV_VERSION "0.1.0"
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#define ATA_HD_CONTROL 0x39
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static struct scsi_host_template pata_falcon_sht = {
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ATA_PIO_SHT(DRV_NAME),
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};
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static unsigned int pata_falcon_data_xfer(struct ata_queued_cmd *qc,
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unsigned char *buf,
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unsigned int buflen, int rw)
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{
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struct ata_device *dev = qc->dev;
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struct ata_port *ap = dev->link->ap;
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void __iomem *data_addr = ap->ioaddr.data_addr;
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unsigned int words = buflen >> 1;
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struct scsi_cmnd *cmd = qc->scsicmd;
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bool swap = 1;
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if (dev->class == ATA_DEV_ATA && cmd && cmd->request &&
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!blk_rq_is_passthrough(cmd->request))
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swap = 0;
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/* Transfer multiple of 2 bytes */
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if (rw == READ) {
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if (swap)
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raw_insw_swapw((u16 *)data_addr, (u16 *)buf, words);
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else
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raw_insw((u16 *)data_addr, (u16 *)buf, words);
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} else {
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if (swap)
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raw_outsw_swapw((u16 *)data_addr, (u16 *)buf, words);
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else
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raw_outsw((u16 *)data_addr, (u16 *)buf, words);
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}
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/* Transfer trailing byte, if any. */
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if (unlikely(buflen & 0x01)) {
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unsigned char pad[2] = { };
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/* Point buf to the tail of buffer */
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buf += buflen - 1;
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if (rw == READ) {
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if (swap)
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raw_insw_swapw((u16 *)data_addr, (u16 *)pad, 1);
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else
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raw_insw((u16 *)data_addr, (u16 *)pad, 1);
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*buf = pad[0];
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} else {
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pad[0] = *buf;
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if (swap)
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raw_outsw_swapw((u16 *)data_addr, (u16 *)pad, 1);
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else
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raw_outsw((u16 *)data_addr, (u16 *)pad, 1);
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}
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words++;
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}
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return words << 1;
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}
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/*
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* Provide our own set_mode() as we don't want to change anything that has
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* already been configured..
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*/
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static int pata_falcon_set_mode(struct ata_link *link,
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struct ata_device **unused)
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{
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struct ata_device *dev;
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ata_for_each_dev(dev, link, ENABLED) {
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/* We don't really care */
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dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
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dev->xfer_shift = ATA_SHIFT_PIO;
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dev->flags |= ATA_DFLAG_PIO;
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ata_dev_info(dev, "configured for PIO\n");
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}
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return 0;
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}
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static struct ata_port_operations pata_falcon_ops = {
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.inherits = &ata_sff_port_ops,
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.sff_data_xfer = pata_falcon_data_xfer,
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.cable_detect = ata_cable_unknown,
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.set_mode = pata_falcon_set_mode,
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};
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static int __init pata_falcon_init_one(struct platform_device *pdev)
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{
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struct resource *res;
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struct ata_host *host;
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struct ata_port *ap;
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void __iomem *base;
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dev_info(&pdev->dev, "Atari Falcon PATA controller\n");
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -ENODEV;
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if (!devm_request_mem_region(&pdev->dev, res->start,
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resource_size(res), DRV_NAME)) {
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dev_err(&pdev->dev, "resources busy\n");
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return -EBUSY;
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}
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/* allocate host */
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host = ata_host_alloc(&pdev->dev, 1);
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if (!host)
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return -ENOMEM;
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ap = host->ports[0];
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ap->ops = &pata_falcon_ops;
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ap->pio_mask = ATA_PIO4;
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ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
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ap->flags |= ATA_FLAG_PIO_POLLING;
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base = (void __iomem *)res->start;
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ap->ioaddr.data_addr = base;
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ap->ioaddr.error_addr = base + 1 + 1 * 4;
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ap->ioaddr.feature_addr = base + 1 + 1 * 4;
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ap->ioaddr.nsect_addr = base + 1 + 2 * 4;
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ap->ioaddr.lbal_addr = base + 1 + 3 * 4;
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ap->ioaddr.lbam_addr = base + 1 + 4 * 4;
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ap->ioaddr.lbah_addr = base + 1 + 5 * 4;
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ap->ioaddr.device_addr = base + 1 + 6 * 4;
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ap->ioaddr.status_addr = base + 1 + 7 * 4;
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ap->ioaddr.command_addr = base + 1 + 7 * 4;
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ap->ioaddr.altstatus_addr = base + ATA_HD_CONTROL;
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ap->ioaddr.ctl_addr = base + ATA_HD_CONTROL;
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ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", (unsigned long)base,
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(unsigned long)base + ATA_HD_CONTROL);
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/* activate */
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return ata_host_activate(host, 0, NULL, 0, &pata_falcon_sht);
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}
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static int __exit pata_falcon_remove_one(struct platform_device *pdev)
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{
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struct ata_host *host = platform_get_drvdata(pdev);
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ata_host_detach(host);
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return 0;
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}
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static struct platform_driver pata_falcon_driver = {
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.remove = __exit_p(pata_falcon_remove_one),
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.driver = {
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.name = "atari-falcon-ide",
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},
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};
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module_platform_driver_probe(pata_falcon_driver, pata_falcon_init_one);
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MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
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MODULE_DESCRIPTION("low-level driver for Atari Falcon PATA");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:atari-falcon-ide");
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MODULE_VERSION(DRV_VERSION);
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