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[IDE] Add driver for Sibyte Swarm evaluation board
This driver supports the IDE port on the Sibyte Swarm evaluation boards and it's relatives for the BCM1250 family of systems on a chip. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Ralf Baechle
parent
b60ccd575c
commit
4237f22901
@ -787,6 +787,10 @@ config BLK_DEV_IDE_PMAC_BLINK
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This option enables the use of the sleep LED as a hard drive
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activity LED.
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config BLK_DEV_IDE_SWARM
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tristate "IDE for Sibyte evaluation boards"
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depends on SIBYTE_SB1xxx_SOC
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config BLK_DEV_IDE_AU1XXX
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bool "IDE for AMD Alchemy Au1200"
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depends on SOC_AU1200
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@ -48,6 +48,6 @@ obj-$(CONFIG_BLK_DEV_IDECD) += ide-cd.o
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obj-$(CONFIG_BLK_DEV_IDETAPE) += ide-tape.o
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obj-$(CONFIG_BLK_DEV_IDEFLOPPY) += ide-floppy.o
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obj-$(CONFIG_BLK_DEV_IDE) += legacy/ arm/
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obj-$(CONFIG_BLK_DEV_IDE) += legacy/ arm/ mips/
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obj-$(CONFIG_BLK_DEV_HD) += legacy/
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obj-$(CONFIG_ETRAX_IDE) += cris/
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1
drivers/ide/mips/Makefile
Normal file
1
drivers/ide/mips/Makefile
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@ -0,0 +1 @@
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obj-$(CONFIG_BLK_DEV_IDE_SWARM) += swarm.o
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201
drivers/ide/mips/swarm.c
Normal file
201
drivers/ide/mips/swarm.c
Normal file
@ -0,0 +1,201 @@
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/*
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* Copyright (C) 2001, 2002, 2003 Broadcom Corporation
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* Copyright (C) 2004 MontaVista Software Inc.
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* Author: Manish Lachwani, mlachwani@mvista.com
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* Copyright (C) 2004 MIPS Technologies, Inc. All rights reserved.
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* Author: Maciej W. Rozycki <macro@mips.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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* Derived loosely from ide-pmac.c, so:
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* Copyright (C) 1998 Paul Mackerras.
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* Copyright (C) 1995-1998 Mark Lord
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*/
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/*
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* Boards with SiByte processors so far have supported IDE devices via
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* the Generic Bus, PCI bus, and built-in PCMCIA interface. In all
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* cases, byte-swapping must be avoided for these devices (whereas
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* other PCI devices, for example, will require swapping). Any
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* SiByte-targetted kernel including IDE support will include this
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* file. Probing of a Generic Bus for an IDE device is controlled by
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* the definition of "SIBYTE_HAVE_IDE", which is provided by
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* <asm/sibyte/board.h> for Broadcom boards.
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*/
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#include <linux/ide.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/platform_device.h>
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#include <asm/io.h>
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#include <asm/sibyte/board.h>
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#include <asm/sibyte/sb1250_genbus.h>
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#include <asm/sibyte/sb1250_regs.h>
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#define DRV_NAME "ide-swarm"
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static char swarm_ide_string[] = DRV_NAME;
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static struct resource swarm_ide_resource = {
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.name = "SWARM GenBus IDE",
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device *swarm_ide_dev;
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/*
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* swarm_ide_probe - if the board header indicates the existence of
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* Generic Bus IDE, allocate a HWIF for it.
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*/
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static int __devinit swarm_ide_probe(struct device *dev)
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{
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ide_hwif_t *hwif;
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u8 __iomem *base;
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phys_t offset, size;
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int i;
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if (!SIBYTE_HAVE_IDE)
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return -ENODEV;
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/* Find an empty slot. */
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for (i = 0; i < MAX_HWIFS; i++)
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if (!ide_hwifs[i].io_ports[IDE_DATA_OFFSET])
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break;
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if (i >= MAX_HWIFS) {
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printk(KERN_ERR DRV_NAME ": no free slot for interface\n");
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return -ENOMEM;
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}
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hwif = ide_hwifs + i;
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base = ioremap(A_IO_EXT_BASE, 0x800);
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offset = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS));
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size = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_MULT_SIZE, IDE_CS));
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iounmap(base);
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offset = G_IO_START_ADDR(offset) << S_IO_ADDRBASE;
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size = (G_IO_MULT_SIZE(size) + 1) << S_IO_REGSIZE;
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if (offset < A_PHYS_GENBUS || offset >= A_PHYS_GENBUS_END) {
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printk(KERN_INFO DRV_NAME
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": IDE interface at GenBus disabled\n");
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return -EBUSY;
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}
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printk(KERN_INFO DRV_NAME ": IDE interface at GenBus slot %i\n",
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IDE_CS);
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swarm_ide_resource.start = offset;
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swarm_ide_resource.end = offset + size - 1;
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if (request_resource(&iomem_resource, &swarm_ide_resource)) {
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printk(KERN_ERR DRV_NAME
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": can't request I/O memory resource\n");
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return -EBUSY;
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}
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base = ioremap(offset, size);
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/* Setup MMIO ops. */
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default_hwif_mmiops(hwif);
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/* Prevent resource map manipulation. */
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hwif->mmio = 2;
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hwif->noprobe = 0;
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for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
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hwif->hw.io_ports[i] =
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(unsigned long)(base + ((0x1f0 + i) << 5));
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hwif->hw.io_ports[IDE_CONTROL_OFFSET] =
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(unsigned long)(base + (0x3f6 << 5));
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hwif->hw.irq = K_INT_GB_IDE;
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memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
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hwif->irq = hwif->hw.irq;
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dev_set_drvdata(dev, hwif);
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return 0;
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}
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static struct device_driver swarm_ide_driver = {
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.name = swarm_ide_string,
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.bus = &platform_bus_type,
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.probe = swarm_ide_probe,
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};
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static void swarm_ide_platform_release(struct device *device)
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{
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struct platform_device *pldev;
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/* free device */
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pldev = to_platform_device(device);
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kfree(pldev);
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}
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static int __devinit swarm_ide_init_module(void)
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{
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struct platform_device *pldev;
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int err;
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printk(KERN_INFO "SWARM IDE driver\n");
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if (driver_register(&swarm_ide_driver)) {
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printk(KERN_ERR "Driver registration failed\n");
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err = -ENODEV;
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goto out;
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}
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if (!(pldev = kmalloc(sizeof (*pldev), GFP_KERNEL))) {
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err = -ENOMEM;
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goto out_unregister_driver;
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}
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memset (pldev, 0, sizeof (*pldev));
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pldev->name = swarm_ide_string;
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pldev->id = 0;
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pldev->dev.release = swarm_ide_platform_release;
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if (platform_device_register(pldev)) {
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err = -ENODEV;
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goto out_free_pldev;
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}
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if (!pldev->dev.driver) {
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/*
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* The driver was not bound to this device, there was
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* no hardware at this address. Unregister it, as the
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* release fuction will take care of freeing the
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* allocated structure
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*/
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platform_device_unregister (pldev);
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}
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swarm_ide_dev = pldev;
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return 0;
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out_free_pldev:
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kfree(pldev);
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out_unregister_driver:
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driver_unregister(&swarm_ide_driver);
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out:
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return err;
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}
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module_init(swarm_ide_init_module);
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