ata: add Amiga Gayle PATA controller driver
Add Amiga Gayle PATA controller driver. It enables libata support for the on-board IDE interfaces on some Amiga models (A600, A1200, A4000 and A4000T) and also for IDE interfaces on the Zorro expansion bus (M-Tech E-Matrix 530 expansion card). Thanks to John Paul Adrian Glaubitz and Michael Schmitz for help with testing the driver. Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Michael Schmitz <schmitzmic@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Bartlomiej Zolnierkiewicz
Tejun Heo
Родитель
e5878732a5
Коммит
9ab27d1d35
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@ -963,6 +963,18 @@ config PATA_FALCON
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If unsure, say N.
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config PATA_GAYLE
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tristate "Amiga Gayle PATA support"
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depends on M68K && AMIGA
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help
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This option enables support for the on-board IDE
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interfaces on some Amiga models (A600, A1200,
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A4000 and A4000T) and also for IDE interfaces on
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the Zorro expansion bus (M-Tech E-Matrix 530
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expansion card).
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If unsure, say N.
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config PATA_ISAPNP
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tristate "ISA Plug and Play PATA support"
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depends on ISAPNP
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@ -98,6 +98,7 @@ obj-$(CONFIG_PATA_WINBOND) += pata_sl82c105.o
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# SFF PIO only
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obj-$(CONFIG_PATA_CMD640_PCI) += pata_cmd640.o
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obj-$(CONFIG_PATA_FALCON) += pata_falcon.o
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obj-$(CONFIG_PATA_GAYLE) += pata_gayle.o
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obj-$(CONFIG_PATA_ISAPNP) += pata_isapnp.o
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obj-$(CONFIG_PATA_IXP4XX_CF) += pata_ixp4xx_cf.o
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obj-$(CONFIG_PATA_MPIIX) += pata_mpiix.o
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@ -0,0 +1,219 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Amiga Gayle PATA controller driver
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*
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* Copyright (c) 2018 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Based on gayle.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/ata.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/libata.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/zorro.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_host.h>
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#include <asm/amigahw.h>
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#include <asm/amigaints.h>
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#include <asm/amigayle.h>
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#include <asm/ide.h>
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#include <asm/setup.h>
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#define DRV_NAME "pata_gayle"
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#define DRV_VERSION "0.1.0"
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#define GAYLE_CONTROL 0x101a
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static struct scsi_host_template pata_gayle_sht = {
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ATA_PIO_SHT(DRV_NAME),
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};
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/* FIXME: is this needed? */
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static unsigned int pata_gayle_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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/* Transfer multiple of 2 bytes */
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if (rw == READ)
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raw_insw((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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/* 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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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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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_gayle_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 bool pata_gayle_irq_check(struct ata_port *ap)
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{
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u8 ch;
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ch = z_readb((unsigned long)ap->private_data);
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return !!(ch & GAYLE_IRQ_IDE);
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}
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static void pata_gayle_irq_clear(struct ata_port *ap)
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{
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(void)z_readb((unsigned long)ap->ioaddr.status_addr);
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z_writeb(0x7c, (unsigned long)ap->private_data);
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}
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static struct ata_port_operations pata_gayle_a1200_ops = {
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.inherits = &ata_sff_port_ops,
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.sff_data_xfer = pata_gayle_data_xfer,
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.sff_irq_check = pata_gayle_irq_check,
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.sff_irq_clear = pata_gayle_irq_clear,
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.cable_detect = ata_cable_unknown,
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.set_mode = pata_gayle_set_mode,
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};
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static struct ata_port_operations pata_gayle_a4000_ops = {
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.inherits = &ata_sff_port_ops,
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.sff_data_xfer = pata_gayle_data_xfer,
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.cable_detect = ata_cable_unknown,
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.set_mode = pata_gayle_set_mode,
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};
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static int __init pata_gayle_init_one(struct platform_device *pdev)
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{
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struct resource *res;
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struct gayle_ide_platform_data *pdata;
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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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int ret;
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pdata = dev_get_platdata(&pdev->dev);
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dev_info(&pdev->dev, "Amiga Gayle IDE controller (A%u style)\n",
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pdata->explicit_ack ? 1200 : 4000);
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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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pr_err(DRV_NAME ": 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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if (pdata->explicit_ack)
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ap->ops = &pata_gayle_a1200_ops;
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else
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ap->ops = &pata_gayle_a4000_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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base = ZTWO_VADDR(pdata->base);
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ap->ioaddr.data_addr = base;
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ap->ioaddr.error_addr = base + 2 + 1 * 4;
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ap->ioaddr.feature_addr = base + 2 + 1 * 4;
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ap->ioaddr.nsect_addr = base + 2 + 2 * 4;
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ap->ioaddr.lbal_addr = base + 2 + 3 * 4;
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ap->ioaddr.lbam_addr = base + 2 + 4 * 4;
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ap->ioaddr.lbah_addr = base + 2 + 5 * 4;
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ap->ioaddr.device_addr = base + 2 + 6 * 4;
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ap->ioaddr.status_addr = base + 2 + 7 * 4;
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ap->ioaddr.command_addr = base + 2 + 7 * 4;
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ap->ioaddr.altstatus_addr = base + GAYLE_CONTROL;
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ap->ioaddr.ctl_addr = base + GAYLE_CONTROL;
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ap->private_data = (void *)ZTWO_VADDR(pdata->irqport);
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ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", pdata->base,
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pdata->base + GAYLE_CONTROL);
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ret = ata_host_activate(host, IRQ_AMIGA_PORTS, ata_sff_interrupt,
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IRQF_SHARED, &pata_gayle_sht);
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if (ret)
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return ret;
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platform_set_drvdata(pdev, host);
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return 0;
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}
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static int __exit pata_gayle_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_gayle_driver = {
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.remove = __exit_p(pata_gayle_remove_one),
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.driver = {
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.name = "amiga-gayle-ide",
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},
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};
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module_platform_driver_probe(pata_gayle_driver, pata_gayle_init_one);
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MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
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MODULE_DESCRIPTION("low-level driver for Amiga Gayle PATA");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:amiga-gayle-ide");
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MODULE_VERSION(DRV_VERSION);
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