diff options
Diffstat (limited to 'drivers/ide/mips')
| -rw-r--r-- | drivers/ide/mips/Makefile | 1 | ||||
| -rw-r--r-- | drivers/ide/mips/swarm.c | 201 |
2 files changed, 202 insertions, 0 deletions
diff --git a/drivers/ide/mips/Makefile b/drivers/ide/mips/Makefile new file mode 100644 index 00000000000..578e52a5958 --- /dev/null +++ b/drivers/ide/mips/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_BLK_DEV_IDE_SWARM) += swarm.o diff --git a/drivers/ide/mips/swarm.c b/drivers/ide/mips/swarm.c new file mode 100644 index 00000000000..66f6064f464 --- /dev/null +++ b/drivers/ide/mips/swarm.c @@ -0,0 +1,201 @@ +/* + * 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); |