2 * Copyright (C) 2001, 2002, 2003 Broadcom Corporation
3 * Copyright (C) 2004 MontaVista Software Inc.
4 * Author: Manish Lachwani, mlachwani@mvista.com
5 * Copyright (C) 2004 MIPS Technologies, Inc. All rights reserved.
6 * Author: Maciej W. Rozycki <macro@mips.com>
7 * Copyright (c) 2006 Maciej W. Rozycki
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version 2
12 * of the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 * Derived loosely from ide-pmac.c, so:
26 * Copyright (C) 1998 Paul Mackerras.
27 * Copyright (C) 1995-1998 Mark Lord
31 * Boards with SiByte processors so far have supported IDE devices via
32 * the Generic Bus, PCI bus, and built-in PCMCIA interface. In all
33 * cases, byte-swapping must be avoided for these devices (whereas
34 * other PCI devices, for example, will require swapping). Any
35 * SiByte-targetted kernel including IDE support will include this
36 * file. Probing of a Generic Bus for an IDE device is controlled by
37 * the definition of "SIBYTE_HAVE_IDE", which is provided by
38 * <asm/sibyte/board.h> for Broadcom boards.
41 #include <linux/ide.h>
42 #include <linux/ioport.h>
43 #include <linux/kernel.h>
44 #include <linux/types.h>
45 #include <linux/platform_device.h>
49 #include <asm/sibyte/board.h>
50 #include <asm/sibyte/sb1250_genbus.h>
51 #include <asm/sibyte/sb1250_regs.h>
53 #define DRV_NAME "ide-swarm"
55 static char swarm_ide_string[] = DRV_NAME;
57 static struct resource swarm_ide_resource = {
58 .name = "SWARM GenBus IDE",
59 .flags = IORESOURCE_MEM,
62 static struct platform_device *swarm_ide_dev;
65 * swarm_ide_probe - if the board header indicates the existence of
66 * Generic Bus IDE, allocate a HWIF for it.
68 static int __devinit swarm_ide_probe(struct device *dev)
78 /* Find an empty slot. */
79 for (i = 0; i < MAX_HWIFS; i++)
80 if (!ide_hwifs[i].io_ports[IDE_DATA_OFFSET])
83 printk(KERN_ERR DRV_NAME ": no free slot for interface\n");
89 base = ioremap(A_IO_EXT_BASE, 0x800);
90 offset = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS));
91 size = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_MULT_SIZE, IDE_CS));
94 offset = G_IO_START_ADDR(offset) << S_IO_ADDRBASE;
95 size = (G_IO_MULT_SIZE(size) + 1) << S_IO_REGSIZE;
96 if (offset < A_PHYS_GENBUS || offset >= A_PHYS_GENBUS_END) {
97 printk(KERN_INFO DRV_NAME
98 ": IDE interface at GenBus disabled\n");
102 printk(KERN_INFO DRV_NAME ": IDE interface at GenBus slot %i\n",
105 swarm_ide_resource.start = offset;
106 swarm_ide_resource.end = offset + size - 1;
107 if (request_resource(&iomem_resource, &swarm_ide_resource)) {
108 printk(KERN_ERR DRV_NAME
109 ": can't request I/O memory resource\n");
113 base = ioremap(offset, size);
115 /* Setup MMIO ops. */
116 default_hwif_mmiops(hwif);
117 /* Prevent resource map manipulation. */
121 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
122 hwif->hw.io_ports[i] =
123 (unsigned long)(base + ((0x1f0 + i) << 5));
124 hwif->hw.io_ports[IDE_CONTROL_OFFSET] =
125 (unsigned long)(base + (0x3f6 << 5));
126 hwif->hw.irq = K_INT_GB_IDE;
128 memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports));
129 hwif->irq = hwif->hw.irq;
131 probe_hwif_init(hwif);
132 dev_set_drvdata(dev, hwif);
137 static struct device_driver swarm_ide_driver = {
138 .name = swarm_ide_string,
139 .bus = &platform_bus_type,
140 .probe = swarm_ide_probe,
143 static void swarm_ide_platform_release(struct device *device)
145 struct platform_device *pldev;
148 pldev = to_platform_device(device);
152 static int __devinit swarm_ide_init_module(void)
154 struct platform_device *pldev;
157 printk(KERN_INFO "SWARM IDE driver\n");
159 if (driver_register(&swarm_ide_driver)) {
160 printk(KERN_ERR "Driver registration failed\n");
165 if (!(pldev = kmalloc(sizeof (*pldev), GFP_KERNEL))) {
167 goto out_unregister_driver;
170 memset (pldev, 0, sizeof (*pldev));
171 pldev->name = swarm_ide_string;
173 pldev->dev.release = swarm_ide_platform_release;
175 if (platform_device_register(pldev)) {
180 if (!pldev->dev.driver) {
182 * The driver was not bound to this device, there was
183 * no hardware at this address. Unregister it, as the
184 * release fuction will take care of freeing the
185 * allocated structure
187 platform_device_unregister (pldev);
190 swarm_ide_dev = pldev;
197 out_unregister_driver:
198 driver_unregister(&swarm_ide_driver);
203 module_init(swarm_ide_init_module);