Commit 8cb1f567 authored by Anton Vorontsov's avatar Anton Vorontsov Committed by Bartlomiej Zolnierkiewicz
Browse files

ide: Platform IDE driver 



This is now very similar to pata_platform.c, they both use
same platform data structure and same resources.

To achieve that, byte_lanes_swapping platform data variable
and platform specified iops removed from that driver. It's fine,
since those were never used anyway.

pata_platform and ide_platform are carrying same driver names,
to easily switch between these drivers, without need to touch
platform code.

Bart:
- build fix from Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: default avatarAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: default avatarVitaly Bordug <vitb@kernel.crashing.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Acked-by: default avatarAlan Cox <alan@redhat.com>
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent b4e44369

drivers/ide/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -308,6 +308,14 @@ config IDE_GENERIC 
	help

	  If unsure, say N.



config BLK_DEV_PLATFORM

	tristate "Platform driver for IDE interfaces"

	help

	  This is the platform IDE driver, used mostly for Memory Mapped

	  IDE devices, like Compact Flashes running in True IDE mode.



	  If unsure, say N.



config BLK_DEV_CMD640

	bool "CMD640 chipset bugfix/support"

	depends on X86

drivers/ide/legacy/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -7,6 +7,8 @@ obj-$(CONFIG_BLK_DEV_UMC8672) += umc8672.o 


obj-$(CONFIG_BLK_DEV_IDECS)		+= ide-cs.o



obj-$(CONFIG_BLK_DEV_PLATFORM)		+= ide_platform.o



# Last of all

obj-$(CONFIG_BLK_DEV_HD)		+= hd.o

drivers/ide/legacy/ide_platform.c

0 → 100644
+182 −0
Original line number Diff line number Diff line 
/*

 * Platform IDE driver

 *

 * Copyright (C) 2007 MontaVista Software

 *

 * Maintainer: Kumar Gala <galak@kernel.crashing.org>

 *

 * This program is free software; you can redistribute  it and/or modify it

 * under  the terms of  the GNU General  Public License as published by the

 * Free Software Foundation;  either version 2 of the  License, or (at your

 * option) any later version.

 */



#include <linux/types.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/ide.h>

#include <linux/ioport.h>

#include <linux/module.h>

#include <linux/pata_platform.h>

#include <linux/platform_device.h>

#include <linux/io.h>



static struct {

	void __iomem *plat_ide_mapbase;

	void __iomem *plat_ide_alt_mapbase;

	ide_hwif_t *hwif;

	int index;

} hwif_prop;



static ide_hwif_t *__devinit plat_ide_locate_hwif(void __iomem *base,

	    void __iomem *ctrl, struct pata_platform_info *pdata, int irq,

	    int mmio)

{

	unsigned long port = (unsigned long)base;

	ide_hwif_t *hwif;

	int index, i;



	for (index = 0; index < MAX_HWIFS; ++index) {

		hwif = ide_hwifs + index;

		if (hwif->io_ports[IDE_DATA_OFFSET] == port)

			goto found;

	}



	for (index = 0; index < MAX_HWIFS; ++index) {

		hwif = ide_hwifs + index;

		if (hwif->io_ports[IDE_DATA_OFFSET] == 0)

			goto found;

	}



	return NULL;



found:



	hwif->hw.io_ports[IDE_DATA_OFFSET] = port;



	port += (1 << pdata->ioport_shift);

	for (i = IDE_ERROR_OFFSET; i <= IDE_STATUS_OFFSET;

	     i++, port += (1 << pdata->ioport_shift))

		hwif->hw.io_ports[i] = port;



	hwif->hw.io_ports[IDE_CONTROL_OFFSET] = (unsigned long)ctrl;



	memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));

	hwif->hw.irq = hwif->irq = irq;



	hwif->hw.dma = NO_DMA;

	hwif->hw.chipset = ide_generic;



	if (mmio) {

		hwif->mmio = 1;

		default_hwif_mmiops(hwif);

	}



	hwif_prop.hwif = hwif;

	hwif_prop.index = index;



	return hwif;

}



static int __devinit plat_ide_probe(struct platform_device *pdev)

{

	struct resource *res_base, *res_alt, *res_irq;

	ide_hwif_t *hwif;

	struct pata_platform_info *pdata;

	int ret = 0;

	int mmio = 0;



	pdata = pdev->dev.platform_data;



	/* get a pointer to the register memory */

	res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);

	res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);



	if (!res_base || !res_alt) {

		res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);

		res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);

		if (!res_base || !res_alt) {

			ret = -ENOMEM;

			goto out;

		}

		mmio = 1;

	}



	res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);

	if (!res_irq) {

		ret = -EINVAL;

		goto out;

	}



	if (mmio) {

		hwif_prop.plat_ide_mapbase = devm_ioremap(&pdev->dev,

			res_base->start, res_base->end - res_base->start + 1);

		hwif_prop.plat_ide_alt_mapbase = devm_ioremap(&pdev->dev,

			res_alt->start, res_alt->end - res_alt->start + 1);

	} else {

		hwif_prop.plat_ide_mapbase = devm_ioport_map(&pdev->dev,

			res_base->start, res_base->end - res_base->start + 1);

		hwif_prop.plat_ide_alt_mapbase = devm_ioport_map(&pdev->dev,

			res_alt->start, res_alt->end - res_alt->start + 1);

	}



	hwif = plat_ide_locate_hwif(hwif_prop.plat_ide_mapbase,

	         hwif_prop.plat_ide_alt_mapbase, pdata, res_irq->start, mmio);



	if (!hwif) {

		ret = -ENODEV;

		goto out;

	}

	hwif->gendev.parent = &pdev->dev;

	hwif->noprobe = 0;



	probe_hwif_init(hwif);



	platform_set_drvdata(pdev, hwif);

	ide_proc_register_port(hwif);



	return 0;



out:

	return ret;

}



static int __devexit plat_ide_remove(struct platform_device *pdev)

{

	ide_hwif_t *hwif = pdev->dev.driver_data;



	if (hwif != hwif_prop.hwif) {

		dev_printk(KERN_DEBUG, &pdev->dev, "%s: hwif value error",

		           pdev->name);

	} else {

		ide_unregister(hwif_prop.index);

		hwif_prop.index = 0;

		hwif_prop.hwif = NULL;

	}



	return 0;

}



static struct platform_driver platform_ide_driver = {

	.driver = {

		.name = "pata_platform",

	},

	.probe = plat_ide_probe,

	.remove = __devexit_p(plat_ide_remove),

};



static int __init platform_ide_init(void)

{

	return platform_driver_register(&platform_ide_driver);

}



static void __exit platform_ide_exit(void)

{

	platform_driver_unregister(&platform_ide_driver);

}



MODULE_DESCRIPTION("Platform IDE driver");

MODULE_LICENSE("GPL");



module_init(platform_ide_init);

module_exit(platform_ide_exit);

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