[IDE] Add driver for Sibyte Swarm evaluation board (4237f229) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/ide/Kconfig

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Original line number	Original line	Diff line number	Diff line
	@@ -787,6 +787,10 @@ config BLK_DEV_IDE_PMAC_BLINK
	This option enables the use of the sleep LED as a hard drive		This option enables the use of the sleep LED as a hard drive
	activity LED.		activity LED.

			config BLK_DEV_IDE_SWARM
			tristate "IDE for Sibyte evaluation boards"
			depends on SIBYTE_SB1xxx_SOC

	config BLK_DEV_IDE_AU1XXX		config BLK_DEV_IDE_AU1XXX
	bool "IDE for AMD Alchemy Au1200"		bool "IDE for AMD Alchemy Au1200"
	depends on SOC_AU1200		depends on SOC_AU1200

drivers/ide/Makefile

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -48,6 +48,6 @@ obj-$(CONFIG_BLK_DEV_IDECD) += ide-cd.o
	obj-$(CONFIG_BLK_DEV_IDETAPE) += ide-tape.o		obj-$(CONFIG_BLK_DEV_IDETAPE) += ide-tape.o
	obj-$(CONFIG_BLK_DEV_IDEFLOPPY) += ide-floppy.o		obj-$(CONFIG_BLK_DEV_IDEFLOPPY) += ide-floppy.o

	obj-$(CONFIG_BLK_DEV_IDE) += legacy/ arm/		obj-$(CONFIG_BLK_DEV_IDE) += legacy/ arm/ mips/
	obj-$(CONFIG_BLK_DEV_HD) += legacy/		obj-$(CONFIG_BLK_DEV_HD) += legacy/
	obj-$(CONFIG_ETRAX_IDE) += cris/		obj-$(CONFIG_ETRAX_IDE) += cris/

drivers/ide/mips/Makefile

0 → 100644

+1 −0

Original line number	Original line	Diff line number	Diff line
			obj-$(CONFIG_BLK_DEV_IDE_SWARM) += swarm.o

drivers/ide/mips/swarm.c

0 → 100644

+201 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* Copyright (C) 2001, 2002, 2003 Broadcom Corporation
			* Copyright (C) 2004 MontaVista Software Inc.
			* Author: Manish Lachwani, mlachwani@mvista.com
			* Copyright (C) 2004 MIPS Technologies, Inc. All rights reserved.
			* Author: Maciej W. Rozycki <macro@mips.com>
			*
			* 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.
			*
			* This program is distributed in the hope that it will be useful,
			* but WITHOUT ANY WARRANTY; without even the implied warranty of
			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
			* GNU General Public License for more details.
			*
			* You should have received a copy of the GNU General Public License
			* along with this program; if not, write to the Free Software
			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
			*/

			/*
			* Derived loosely from ide-pmac.c, so:
			* Copyright (C) 1998 Paul Mackerras.
			* Copyright (C) 1995-1998 Mark Lord
			*/

			/*
			* Boards with SiByte processors so far have supported IDE devices via
			* the Generic Bus, PCI bus, and built-in PCMCIA interface. In all
			* cases, byte-swapping must be avoided for these devices (whereas
			* other PCI devices, for example, will require swapping). Any
			* SiByte-targetted kernel including IDE support will include this
			* file. Probing of a Generic Bus for an IDE device is controlled by
			* the definition of "SIBYTE_HAVE_IDE", which is provided by
			* <asm/sibyte/board.h> for Broadcom boards.
			*/

			#include <linux/ide.h>
			#include <linux/ioport.h>
			#include <linux/kernel.h>
			#include <linux/types.h>
			#include <linux/platform_device.h>

			#include <asm/io.h>

			#include <asm/sibyte/board.h>
			#include <asm/sibyte/sb1250_genbus.h>
			#include <asm/sibyte/sb1250_regs.h>

			#define DRV_NAME "ide-swarm"

			static char swarm_ide_string[] = DRV_NAME;

			static struct resource swarm_ide_resource = {
			.name = "SWARM GenBus IDE",
			.flags = IORESOURCE_MEM,
			};

			static struct platform_device *swarm_ide_dev;

			/*
			* swarm_ide_probe - if the board header indicates the existence of
			* Generic Bus IDE, allocate a HWIF for it.
			*/
			static int __devinit swarm_ide_probe(struct device *dev)
			{
			ide_hwif_t *hwif;
			u8 __iomem *base;
			phys_t offset, size;
			int i;

			if (!SIBYTE_HAVE_IDE)
			return -ENODEV;

			/* Find an empty slot. */
			for (i = 0; i < MAX_HWIFS; i++)
			if (!ide_hwifs[i].io_ports[IDE_DATA_OFFSET])
			break;
			if (i >= MAX_HWIFS) {
			printk(KERN_ERR DRV_NAME ": no free slot for interface\n");
			return -ENOMEM;
			}

			hwif = ide_hwifs + i;

			base = ioremap(A_IO_EXT_BASE, 0x800);
			offset = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS));
			size = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_MULT_SIZE, IDE_CS));
			iounmap(base);

			offset = G_IO_START_ADDR(offset) << S_IO_ADDRBASE;
			size = (G_IO_MULT_SIZE(size) + 1) << S_IO_REGSIZE;
			if (offset < A_PHYS_GENBUS \|\| offset >= A_PHYS_GENBUS_END) {
			printk(KERN_INFO DRV_NAME
			": IDE interface at GenBus disabled\n");
			return -EBUSY;
			}

			printk(KERN_INFO DRV_NAME ": IDE interface at GenBus slot %i\n",
			IDE_CS);

			swarm_ide_resource.start = offset;
			swarm_ide_resource.end = offset + size - 1;
			if (request_resource(&iomem_resource, &swarm_ide_resource)) {
			printk(KERN_ERR DRV_NAME
			": can't request I/O memory resource\n");
			return -EBUSY;
			}

			base = ioremap(offset, size);

			/* Setup MMIO ops. */
			default_hwif_mmiops(hwif);
			/* Prevent resource map manipulation. */
			hwif->mmio = 2;
			hwif->noprobe = 0;

			for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
			hwif->hw.io_ports[i] =
			(unsigned long)(base + ((0x1f0 + i) << 5));
			hwif->hw.io_ports[IDE_CONTROL_OFFSET] =
			(unsigned long)(base + (0x3f6 << 5));
			hwif->hw.irq = K_INT_GB_IDE;

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

			dev_set_drvdata(dev, hwif);

			return 0;
			}

			static struct device_driver swarm_ide_driver = {
			.name = swarm_ide_string,
			.bus = &platform_bus_type,
			.probe = swarm_ide_probe,
			};

			static void swarm_ide_platform_release(struct device *device)
			{
			struct platform_device *pldev;

			/* free device */
			pldev = to_platform_device(device);
			kfree(pldev);
			}

			static int __devinit swarm_ide_init_module(void)
			{
			struct platform_device *pldev;
			int err;

			printk(KERN_INFO "SWARM IDE driver\n");

			if (driver_register(&swarm_ide_driver)) {
			printk(KERN_ERR "Driver registration failed\n");
			err = -ENODEV;
			goto out;
			}

			if (!(pldev = kmalloc(sizeof (*pldev), GFP_KERNEL))) {
			err = -ENOMEM;
			goto out_unregister_driver;
			}

			memset (pldev, 0, sizeof (*pldev));
			pldev->name = swarm_ide_string;
			pldev->id = 0;
			pldev->dev.release = swarm_ide_platform_release;

			if (platform_device_register(pldev)) {
			err = -ENODEV;
			goto out_free_pldev;
			}

			if (!pldev->dev.driver) {
			/*
			* The driver was not bound to this device, there was
			* no hardware at this address. Unregister it, as the
			* release fuction will take care of freeing the
			* allocated structure
			*/
			platform_device_unregister (pldev);
			}

			swarm_ide_dev = pldev;

			return 0;

			out_free_pldev:
			kfree(pldev);

			out_unregister_driver:
			driver_unregister(&swarm_ide_driver);
			out:
			return err;
			}

			module_init(swarm_ide_init_module);