ata: add Atari Falcon PATA controller driver (7e11aabd) · Commits · 戴 / test

drivers/ata/Kconfig

+9 −0

Original line number	Diff line number	Diff line
		@@ -902,6 +902,15 @@ config PATA_CMD640_PCI

		If unsure, say N.

		config PATA_FALCON
		tristate "Atari Falcon PATA support"
		depends on M68K && ATARI
		help
		This option enables support for the on-board IDE
		interface on the Atari Falcon.

		If unsure, say N.

		config PATA_ISAPNP
		tristate "ISA Plug and Play PATA support"
		depends on ISAPNP

drivers/ata/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -93,6 +93,7 @@ obj-$(CONFIG_PATA_WINBOND) += pata_sl82c105.o
		obj-$(CONFIG_PATA_AT32) += pata_at32.o
		obj-$(CONFIG_PATA_AT91) += pata_at91.o
		obj-$(CONFIG_PATA_CMD640_PCI) += pata_cmd640.o
		obj-$(CONFIG_PATA_FALCON) += pata_falcon.o
		obj-$(CONFIG_PATA_ISAPNP) += pata_isapnp.o
		obj-$(CONFIG_PATA_IXP4XX_CF) += pata_ixp4xx_cf.o
		obj-$(CONFIG_PATA_MPIIX) += pata_mpiix.o

drivers/ata/pata_falcon.c

0 → 100644

+184 −0

Original line number	Diff line number	Diff line
		/*
		* 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
		*
		* This file is subject to the terms and conditions of the GNU General Public
		* License. See the file "COPYING" in the main directory of this archive
		* for more details.
		*/

		#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>
		#include <asm/ide.h>

		#define DRV_NAME "pata_falcon"
		#define DRV_VERSION "0.1.0"

		#define ATA_HD_BASE 0xfff00000
		#define ATA_HD_CONTROL 0x39

		static 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 && cmd->request &&
		cmd->request->cmd_type == REQ_TYPE_FS)
		swap = 0;

		/* Transfer multiple of 2 bytes */
		if (rw == READ) {
		if (swap)
		raw_insw_swapw((u16 )data_addr, (u16 )buf, words);
		else
		raw_insw((u16 )data_addr, (u16 )buf, words);
		} else {
		if (swap)
		raw_outsw_swapw((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) {
		if (swap)
		raw_insw_swapw((u16 )data_addr, (u16 )pad, 1);
		else
		raw_insw((u16 )data_addr, (u16 )pad, 1);
		*buf = pad[0];
		} else {
		pad[0] = *buf;
		if (swap)
		raw_outsw_swapw((u16 )data_addr, (u16 )pad, 1);
		else
		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_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(void)
		{
		struct ata_host *host;
		struct ata_port *ap;
		struct platform_device *pdev;
		void __iomem *base;

		if (!MACH_IS_ATARI \|\| !ATARIHW_PRESENT(IDE))
		return -ENODEV;

		pr_info(DRV_NAME ": Atari Falcon PATA controller\n");

		pdev = platform_device_register_simple(DRV_NAME, 0, NULL, 0);
		if (IS_ERR(pdev))
		return PTR_ERR(pdev);

		if (!devm_request_mem_region(&pdev->dev, ATA_HD_BASE, 0x40, 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];

		ap->ops = &pata_falcon_ops;
		ap->pio_mask = ATA_PIO4;
		ap->flags \|= ATA_FLAG_SLAVE_POSS \| ATA_FLAG_NO_IORDY;
		ap->flags \|= ATA_FLAG_PIO_POLLING;

		base = (void __iomem *)ATA_HD_BASE;
		ap->ioaddr.data_addr = base;
		ap->ioaddr.error_addr = base + 1 + 1 * 4;
		ap->ioaddr.feature_addr = base + 1 + 1 * 4;
		ap->ioaddr.nsect_addr = base + 1 + 2 * 4;
		ap->ioaddr.lbal_addr = base + 1 + 3 * 4;
		ap->ioaddr.lbam_addr = base + 1 + 4 * 4;
		ap->ioaddr.lbah_addr = base + 1 + 5 * 4;
		ap->ioaddr.device_addr = base + 1 + 6 * 4;
		ap->ioaddr.status_addr = base + 1 + 7 * 4;
		ap->ioaddr.command_addr = base + 1 + 7 * 4;

		ap->ioaddr.altstatus_addr = base + ATA_HD_CONTROL;
		ap->ioaddr.ctl_addr = base + ATA_HD_CONTROL;

		ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", (unsigned long)base,
		(unsigned long)base + ATA_HD_CONTROL);

		/* activate */
		return ata_host_activate(host, 0, NULL, 0, &pata_falcon_sht);
		}

		module_init(pata_falcon_init_one);

		MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
		MODULE_DESCRIPTION("low-level driver for Atari Falcon PATA");
		MODULE_LICENSE("GPL");
		MODULE_VERSION(DRV_VERSION);

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