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@xxxxxxxxxxxxxxxxxxx> Cc: Michael Schmitz <schmitzmic@xxxxxxxxx> Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Cc: Philippe Ombredanne <pombredanne@xxxxxxxx> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx> --- v2: - clarify license version (it should be GPL 2.0) - use SPDX header drivers/ata/Kconfig | 12 ++ drivers/ata/Makefile | 1 drivers/ata/pata_gayle.c | 222 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 235 insertions(+) Index: b/drivers/ata/Kconfig =================================================================== --- a/drivers/ata/Kconfig 2018-03-01 11:48:06.941525737 +0100 +++ b/drivers/ata/Kconfig 2018-03-01 11:48:06.921525736 +0100 @@ -963,6 +963,18 @@ config PATA_FALCON If unsure, say N. +config PATA_GAYLE + tristate "Amiga Gayle PATA support" + depends on M68K && AMIGA + help + This option enables 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). + + If unsure, say N. + config PATA_ISAPNP tristate "ISA Plug and Play PATA support" depends on ISAPNP Index: b/drivers/ata/Makefile =================================================================== --- a/drivers/ata/Makefile 2018-03-01 11:48:06.941525737 +0100 +++ b/drivers/ata/Makefile 2018-03-01 11:48:06.937525737 +0100 @@ -98,6 +98,7 @@ obj-$(CONFIG_PATA_WINBOND) += pata_sl82c # SFF PIO only obj-$(CONFIG_PATA_CMD640_PCI) += pata_cmd640.o obj-$(CONFIG_PATA_FALCON) += pata_falcon.o +obj-$(CONFIG_PATA_GAYLE) += pata_gayle.o obj-$(CONFIG_PATA_ISAPNP) += pata_isapnp.o obj-$(CONFIG_PATA_IXP4XX_CF) += pata_ixp4xx_cf.o obj-$(CONFIG_PATA_MPIIX) += pata_mpiix.o Index: b/drivers/ata/pata_gayle.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ b/drivers/ata/pata_gayle.c 2018-03-01 11:57:12.673539480 +0100 @@ -0,0 +1,222 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Amiga Gayle PATA controller driver + * + * Copyright (c) 2018 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * Based on gayle.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/zorro.h> +#include <linux/platform_device.h> + +#include <asm/setup.h> +#include <asm/amigahw.h> +#include <asm/amigaints.h> +#include <asm/amigayle.h> +#include <asm/ide.h> + +#define DRV_NAME "pata_gayle" +#define DRV_VERSION "0.1.0" + +#define GAYLE_CONTROL 0x101a + +static struct scsi_host_template pata_gayle_sht = { + ATA_PIO_SHT(DRV_NAME), +}; + +/* FIXME: is this needed? */ +static unsigned int pata_gayle_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; + + /* Transfer multiple of 2 bytes */ + if (rw == READ) + raw_insw((u16 *)data_addr, (u16 *)buf, words); + else + raw_outsw((u16 *)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) { + raw_insw((u16 *)data_addr, (u16 *)pad, 1); + *buf = pad[0]; + } else { + pad[0] = *buf; + raw_outsw((u16 *)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_gayle_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 bool pata_gayle_irq_check(struct ata_port *ap) +{ + u8 ch; + + ch = z_readb((unsigned long)ap->private_data); + if (!(ch & GAYLE_IRQ_IDE)) + return false; + return true; +} + +static void pata_gayle_irq_clear(struct ata_port *ap) +{ + (void)z_readb((unsigned long)ap->ioaddr.status_addr); + z_writeb(0x7c, (unsigned long)ap->private_data); +} + +static struct ata_port_operations pata_gayle_a1200_ops = { + .inherits = &ata_sff_port_ops, + .sff_data_xfer = pata_gayle_data_xfer, + .sff_irq_check = pata_gayle_irq_check, + .sff_irq_clear = pata_gayle_irq_clear, + .cable_detect = ata_cable_unknown, + .set_mode = pata_gayle_set_mode, +}; + +static struct ata_port_operations pata_gayle_a4000_ops = { + .inherits = &ata_sff_port_ops, + .sff_data_xfer = pata_gayle_data_xfer, + .cable_detect = ata_cable_unknown, + .set_mode = pata_gayle_set_mode, +}; + +static int __init pata_gayle_init_one(struct platform_device *pdev) +{ + struct resource *res; + struct gayle_ide_platform_data *pdata; + struct ata_host *host; + struct ata_port *ap; + void __iomem *base; + int ret; + + pdata = dev_get_platdata(&pdev->dev); + + pr_info(DRV_NAME ": Amiga Gayle IDE controller (A%u style)\n", + pdata->explicit_ack ? 1200 : 4000); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + if (!devm_request_mem_region(&pdev->dev, res->start, + resource_size(res), DRV_NAME)) { + pr_err(DRV_NAME ": resources busy\n"); + return -EBUSY; + } + + /* allocate host */ + host = ata_host_alloc(&pdev->dev, 1); + if (!host) + return -ENOMEM; + + ap = host->ports[0]; + + if (pdata->explicit_ack) + ap->ops = &pata_gayle_a1200_ops; + else + ap->ops = &pata_gayle_a4000_ops; + + ap->pio_mask = ATA_PIO4; + ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY; + + base = ZTWO_VADDR(pdata->base); + ap->ioaddr.data_addr = base; + ap->ioaddr.error_addr = base + 2 + 1 * 4; + ap->ioaddr.feature_addr = base + 2 + 1 * 4; + ap->ioaddr.nsect_addr = base + 2 + 2 * 4; + ap->ioaddr.lbal_addr = base + 2 + 3 * 4; + ap->ioaddr.lbam_addr = base + 2 + 4 * 4; + ap->ioaddr.lbah_addr = base + 2 + 5 * 4; + ap->ioaddr.device_addr = base + 2 + 6 * 4; + ap->ioaddr.status_addr = base + 2 + 7 * 4; + ap->ioaddr.command_addr = base + 2 + 7 * 4; + + ap->ioaddr.altstatus_addr = base + GAYLE_CONTROL; + ap->ioaddr.ctl_addr = base + GAYLE_CONTROL; + + ap->private_data = (void *)ZTWO_VADDR(pdata->irqport); + + ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", (unsigned long)base, + (unsigned long)base + GAYLE_CONTROL); + + /* activate */ + ret = ata_host_activate(host, IRQ_AMIGA_PORTS, ata_sff_interrupt, + IRQF_SHARED, &pata_gayle_sht); + if (ret) + return ret; + + platform_set_drvdata(pdev, host); + + return 0; +} + +static int __exit pata_gayle_remove_one(struct platform_device *pdev) +{ + struct ata_host *host = platform_get_drvdata(pdev); + + ata_host_detach(host); + + return 0; +} + +static struct platform_driver pata_gayle_driver = { + .remove = __exit_p(pata_gayle_remove_one), + .driver = { + .name = "amiga-gayle-ide", + }, +}; + +module_platform_driver_probe(pata_gayle_driver, pata_gayle_init_one); + +MODULE_AUTHOR("Bartlomiej Zolnierkiewicz"); +MODULE_DESCRIPTION("low-level driver for Amiga Gayle PATA"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:amiga-gayle-ide"); +MODULE_VERSION(DRV_VERSION); -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
